KGTP is a realtime and lightweight Linux Kernel GDB debugger and
tracer that use Kprobe.
It make Linux Kernel supply a GDB remote debug interface. Then GDB in
current machine or remote machine(see "Make GDB connect to gtp") can
debug Linux through GDB tracepoint without stop the Linux Kernel. And
even if the board doesn't have GDB on it and doesn't have
interface for remote debug. It can debug the Linux Kernel use offline
debug (See "Offline debug").
It support X86-32, X86-64, MIPS and ARM.
http://www.tudou.com/programs/view/_p6VTgxmCRA/ This is a video(in
Chinese) to show how to use it.
Now, KGTP 20110424 release.
You can get the package for it from
http://kgtp.googlecode.com/files/kgtp_20110424.tar.bz2
or
svn co https://kgtp.googlecode.com/svn/tags/20110424
The main change of this verion is add a special trace state variables
$dump_stack, "collect" it will let Linux Kernel output stack dump
directly.
Following example let Linux Kernel show the stack dump of vfs_readdir:
trace vfs_readdir
commands
collect $dump_stack
end
Then your kernel will printk like:
[22779.208064] gtp 1:Pid: 441, comm: python Not tainted 2.6.39-rc3+ #46
[22779.208068] Call Trace:
[22779.208072] [<fe653cca>] gtp_get_var+0x4a/0xa0 [gtp]
[22779.208076] [<fe653d79>] gtp_collect_var+0x59/0xa0 [gtp]
[22779.208080] [<fe655974>] gtp_action_x+0x1bb4/0x1dc0 [gtp]
[22779.208084] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
[22779.208088] [<c023f152>] ? __find_get_block_slow+0xd2/0x160
[22779.208091] [<c01a8c56>] ? delayacct_end+0x96/0xb0
[22779.208100] [<c023f404>] ? __find_get_block+0x84/0x1d0
[22779.208103] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
[22779.208106] [<c02e0838>] ? find_revoke_record+0xa8/0xc0
[22779.208109] [<c02e0c45>] ? jbd2_journal_cancel_revoke+0xd5/0xe0
[22779.208112] [<c02db51f>] ? __jbd2_journal_temp_unlink_buffer+0x2f/0x110
[22779.208115] [<fe655c4c>] gtp_kp_pre_handler+0xcc/0x1c0 [gtp]
[22779.208118] [<c05b8a88>] kprobe_exceptions_notify+0x3d8/0x440
[22779.208121] [<c05b7d54>] ? hw_breakpoint_exceptions_notify+0x14/0x180
[22779.208124] [<c05b95eb>] ? sub_preempt_count+0x7b/0xb0
[22779.208126] [<c0227ac5>] ? vfs_readdir+0x15/0xb0
[22779.208128] [<c0227ac4>] ? vfs_readdir+0x14/0xb0
[22779.208131] [<c05b9743>] notifier_call_chain+0x43/0x60
[22779.208134] [<c05b9798>] __atomic_notifier_call_chain+0x38/0x50
[22779.208137] [<c05b97cf>] atomic_notifier_call_chain+0x1f/0x30
[22779.208140] [<c05b980d>] notify_die+0x2d/0x30
[22779.208142] [<c05b71c5>] do_int3+0x35/0xa0
Add a special trace state variables $clock. Access it in tracepoint
condition and action will get the return of local_clock() that return
the timestamp in nanoseconds.
And according to Steven Rostedt's mail, move the interface from proc
to debug fs. So, access kgtp need change to /sys/kernel/debug/gtp.
The other change is:
Make frame align better.
Change sp_checked to type 0xff, Change stack of x from local to static.
Fix the bug of $printk_tmp.
Make getgtprsp.pl support special trace state variables.
You can read the doc gtp.txt to get how to use kgtp.
And according to the comments of Christoph. I make a patch for Linux
Kernel and make it looks OK with checkpatch.pl.
Signed-off-by: Hui Zhu <[email protected]>
---
Documentation/trace/gtp.txt | 873 +++++++
arch/arm/include/asm/gtp.h | 13
arch/mips/include/asm/gtp.h | 18
arch/x86/include/asm/gtp.h | 18
lib/Kconfig.debug | 9
lib/Makefile | 2
lib/gtp.c | 5104 ++++++++++++++++++++++++++++++++++++++++++++
scripts/getgtprsp.pl | 102
8 files changed, 6139 insertions(+)
--- /dev/null
+++ b/Documentation/trace/gtp.txt
@@ -0,0 +1,873 @@
+ Linux Kernel GDB tracepoint module (KGTP)
+ =========================================
+ By Hui Zhu <[email protected]>
+ https://code.google.com/p/kgtp/wiki/HOWTO
+ 2011-04-24
+
+Table of contents
+-----------------
+
+What is KGTP
+Report issue about KGTP
+Get info about GDB tracepoint
+Get KGTP through http
+Get KGTP through svn
+Config KGTP
+Compile KGTP
+Install KGTP
+Uninstall KGTP
+Howto use
+ Exec it
+ Make GDB connect to gtp
+ Add module symbols to GDB
+ Get GDB tracepoint commands
+ Get registers info from Kernel
+ Get the value of variable from Kernel
+ How to use use tracepoint condition
+ How to use trace state variables
+ Simple trace state variables
+ Special trace state variables $current_task,
+ $current_thread_info, $cpu_id, $dump_stack, $printk_level,
+ $printk_format, $printk_tmp and $clock
+ Show all the traced data of current frame
+ Get backtrace info from Kernel
+ Howto let tracepoint output value directly
+ Output stack dump directly
+ Switch collect to output the value directly
+ Use printf command in actions
+ Get status of KGTP from Kernel
+ Set the trace buffer into a circular buffer
+ Do not stop tracepoint when the GDB disconnect
+ Howto show the variable that value of it is optimized
+ Linux kernel "Compile with almost no optimization" patch
+ Update your GCC
+ Offline debug
+
+
+
+
+What is KGTP
+------------
+
+KGTP is a realtime and lightweight Linux Kernel GDB debugger and tracer that
+use Kprobe.
+
+It make Linux Kernel supply a GDB remote debug interface. Then GDB in current
+machine or remote machine(see "Make GDB connect to gtp") can debug Linux
+through GDB tracepoint without stop the Linux Kernel.
+And even if the board doesn't have GDB on it and doesn't have interface for
+remote debug. It can debug the Linux Kernel use offline debug (See "Offline
+debug").
+It support X86-32, X86-64, MIPS and ARM.
+http://www.tudou.com/programs/view/_p6VTgxmCRA/ This is a video(in Chinese)
+to show how to use it.
+
+
+
+
+Report issue about KGTP
+-----------------------
+You can post it in https://code.google.com/p/kgtp/issues/list or write Email
+to [email protected].
+
+
+
+
+Get info about GDB tracepoint
+-----------------------------
+Please goto http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
+
+
+
+
+Get KGTP through http
+---------------------
+Please goto http://code.google.com/p/kgtp/downloads/list OR UPDATE to down
+the package.
+
+
+
+
+Get KGTP through svn
+--------------------
+Some people have trouble with access to KGTP website. You can access kgtp
+through svn:
+
+------------------------------------------------------------
+svn checkout http://kgtp.googlecode.com/svn/ kgtp-read-only
+------------------------------------------------------------
+
+kgtp-read-only/tags/ There is the each release of KGTP.
+kgtp-read-only/trunk/ There is the main trunk of KGTP.
+
+
+
+
+Config KGTP
+-----------
+
+Before compile KGTP, you can choice which Kernel you want build with and
+which compiler you want through change the Makefile. For example:
+
+-------------------------------------------
+KERNELDIR := /lib/modules/`uname -r`/build
+CROSS_COMPILE :=
+-------------------------------------------
+
+KERNELDIR is set the directory which Kernel you want build for. Now it set to
+the current kernel that you use.
+CROSS_COMPILE is set the compiler that you want to build the KGTP. Empty mean
+use current compiler.
+ARCH is the architecture.
+
+------------------------------------------
+KERNELDIR := /home/teawater/kernel/bamd64
+CROSS_COMPILE :=x86_64-glibc_std-
+ARCH := x86_64
+------------------------------------------
+
+KERNELDIR is set to /home/teawater/kernel/bamd64. Compiler will
+use x86_64-glibc_std-gcc.
+
+
+
+
+Compile KGTP
+------------
+
+For normal use:
+
+---------
+cd kgtp/
+make
+---------
+
+If you want KGTP out the debug message,please use following (It is available
+after 20100825):
+
+---------
+cd kgtp/
+make D=1
+---------
+
+
+
+
+Install KGTP
+------------
+
+------------------
+cd kgtp/
+sudo make install
+------------------
+
+
+
+
+Uninstall KGTP
+--------------
+
+--------------------
+cd kgtp/
+sudo make uninstall
+--------------------
+
+
+
+
+Howto use
+---------
+
+Exec it
+-------
+
+If you had installed the KGTP in your system, you can:
+
+------------------
+sudo modprobe gtp
+------------------
+
+Or you can use the kgtp module in the directory.
+
+-------------------
+cd kgtp/
+sudo insmod gtp.ko
+-------------------
+
+
+
+Make GDB connect to gtp
+-----------------------
+
+In current machine:
+
+---------------------------------
+sudo gdb ./vmlinux
+(gdb) target remote /sys/kernel/debug/gtp
+Remote debugging using /sys/kernel/debug/gtp
+0x0000000000000000 in ?? ()
+---------------------------------
+
+In remote machine:
+
+---------------------------------------------
+#Open the KGTP interface in current machine.
+sudo su
+nc -l 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp
+(nc -l -p 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp for old version
+netcat.)
+#Let gdb connect to the port 1234
+gdb ./vmlinux
+(gdb) target remote xxx.xxx.xxx.xxx:1234
+---------------------------------------------
+
+
+
+Add module symbols to GDB
+-------------------------
+
+Sometime, you need add the Linux Kernel module(lkm) symbols to GDB to debug it.
+Following a example howto add ext3.ko's symbols to GDB:
+
+--------------------------------------------------------------------------------
+cat /proc/modules | grep ext
+ext3 116512 3 - Live 0xf9083000
+#Get the address 0xf9083000.
+modinfo ext3
+filename: /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
+#Get the directory name of ext3.
+(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
0xf9083000
+#Then, GDB get the symbols of ext3.
+--------------------------------------------------------------------------------
+
+You will see that it just add the text section info to GDB, sometime you need
+add another section info of other section, for example:
+
+--------------------------------------------------------------------------------
+cat /sys/module/ext3/sections/.bss
+0xf908170c
+#Get the bss address 0xf908170c.
+(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
0xf9083000 -s .bss 0xf908170c
+#Then, GDB get the symbols of ext3.
+--------------------------------------------------------------------------------
+
+
+
+Get GDB tracepoint commands
+---------------------------
+
+Please goto http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
+
+
+Get registers info from Kernel
+------------------------------
+
+Following part is an example that record the value of all registers when Linux
+Kernel call function "vfs_readdir".
+
+--------------------------------------------------------------------------------
+(gdb) trace vfs_readdir
+Tracepoint 1 at 0xc01a1ac0: file
+/home/teawater/kernel/linux-2.6/fs/readdir.c, line 23.
+(gdb) actions
+Enter actions for tracepoint 1, one per line.
+End with a line saying just "end".
+>collect $reg
+>end
+(gdb) tstart
+(gdb) shell ls
+(gdb) tstop
+(gdb) tfind
+Found trace frame 0, tracepoint 1
+#0 0xc01a1ac1 in vfs_readdir (file=0xc5528d00, filler=0xc01a1900 <filldir64>,
+ buf=0xc0d09f90) at /home/teawater/kernel/linux-2.6/fs/readdir.c:23
+23 /home/teawater/kernel/linux-2.6/fs/readdir.c: No such file or
directory.
+ in /home/teawater/kernel/linux-2.6/fs/readdir.c
+(gdb) info reg
+eax 0xc5528d00 -984445696
+ecx 0xc0d09f90 -1060069488
+edx 0xc01a1900 -1072031488
+ebx 0xfffffff7 -9
+esp 0xc0d09f8c 0xc0d09f8c
+ebp 0x0 0x0
+esi 0x8061480 134616192
+edi 0xc5528d00 -984445696
+eip 0xc01a1ac1 0xc01a1ac1 <vfs_readdir+1>
+eflags 0x286 [ PF SF IF ]
+cs 0x60 96
+ss 0x8061480 134616192
+ds 0x7b 123
+es 0x7b 123
+fs 0x0 0
+gs 0x0 0
+(gdb) tfind
+Found trace frame 1, tracepoint 1
+0xc01a1ac1 23 in /home/teawater/kernel/linux-2.6/fs/readdir.c
+(gdb) info reg
+eax 0xc5528d00 -984445696
+ecx 0xc0d09f90 -1060069488
+edx 0xc01a1900 -1072031488
+ebx 0xfffffff7 -9
+esp 0xc0d09f8c 0xc0d09f8c
+ebp 0x0 0x0
+esi 0x8061480 134616192
+edi 0xc5528d00 -984445696
+eip 0xc01a1ac1 0xc01a1ac1 <vfs_readdir+1>
+eflags 0x286 [ PF SF IF ]
+cs 0x60 96
+ss 0x8061480 134616192
+ds 0x7b 123
+es 0x7b 123
+fs 0x0 0
+gs 0x0 0
+--------------------------------------------------------------------------------
+
+
+
+Get the value of variable from Kernel
+-------------------------------------
+
+Following part is an example that record the value of "jiffies_64" when Linux
+Kernel call function "vfs_readdir".
+
+--------------------------------------------------------------------------------
+(gdb) trace vfs_readdir
+Tracepoint 1 at 0xc01ed740: file
/home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
+(gdb) actions
+Enter actions for tracepoint 1, one per line.
+End with a line saying just "end".
+>collect jiffies_64
+>collect file->f_path.dentry->d_iname
+>end
+(gdb) tstart
+(gdb) shell ls
+arch drivers include kernel mm Module.symvers
security System.map virt
+block firmware init lib modules.builtin net
sound t vmlinux
+crypto fs ipc Makefile modules.order scripts
source usr vmlinux.o
+(gdb) tstop
+(gdb) tfind
+Found trace frame 0, tracepoint 1
+#0 0xc01ed741 in vfs_readdir (file=0xf4063000, filler=0xc01ed580
<filldir64>, buf=0xd6dfdf90)
+ at /home/teawater/kernel/linux-2.6/fs/readdir.c:24
+24 {
+(gdb) p jiffies_64
+$1 = 4297248706
+(gdb) p file->f_path.dentry->d_iname
+$1 = "b26", '\000' <repeats 28 times>
+--------------------------------------------------------------------------------
+
+
+
+How to use use tracepoint condition
+-----------------------------------
+
+http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoint-Conditions.html
+Like the breakpoint, we can set condition to tracepoint. But it speed is more
+fast than breakpoint's condition because KGTP do all the condition check.
+For example:
+
+------------------------------
+(gdb) trace handle_irq
+(gdb) condition 1 (irq == 47)
+------------------------------
+
+This action of tracepoint 1 will work only when irq number is 47.
+
+
+
+How to use trace state variables
+--------------------------------
+
+http://sourceware.org/gdb/current/onlinedocs/gdb/Trace-State-Variables.html
+Tracepoint have special variables. You can trace it or use it in tracepoint
+condition.
+Note that only GDB 7.2.1 and later version support use trace state variables
+directly, the old version GDB just can show the value of trace state variables
+through command "info tvariables".
+
+
+Simple trace state variables
+----------------------------
+
+Define a trace state variable $c.
+
+-------------------
+(gdb) tvariable $c
+-------------------
+
+Trace state variable $c created, with initial value 0.
+Use it in the action. Follow action will use $c to count how much irq happen
+in Kernel.
+
+-----------------------------------------------------------------------
+(gdb) trace handle_irq
+(gdb) actions
+Enter actions for tracepoint 3, one per line.
+End with a line saying just "end".
+>collect $c #Save current value of $c to the trace frame buffer.
+>teval $c=$c+1 #Increase the $c.
+>end
+-----------------------------------------------------------------------
+
+You can get the current value of $c when the trace is running or stop.
+
+----------------------------------
+(gdb) tstart
+(gdb) info tvariables
+$c 0 31554
+(gdb) p $c
+$5 = 33652
+(gdb) tstop
+(gdb) p $c
+$9 = 105559
+----------------------------------
+
+When use the tfind parse the trace frame buffer, if the value of trace state
+variable is collect. You can use it.
+
+------------------------------
+(gdb) tstop
+(gdb) tfind
+(gdb) info tvariables
+$c 0 0
+(gdb) p $c
+$6 = 0
+(gdb) tfind 100
+(gdb) p $c
+$7 = 100
+------------------------------
+
+
+Special trace state variables $current_task, $current_thread_info, $cpu_id,
+$dump_stack, $printk_level, $printk_format, $printk_tmp and $clock
+--------------------------------------------------------------------------
+
+KGTP have special trace state variables $current_task, $current_thread_info,
+$cpu_id and $clock can very easy to access to some special value. You can see
+them when GDB connect to the KGTP. You can use them in tracepoint condition
+or actions.
+Access $current_task in tracepoint condition and action will get the return
+of get_current().
+Access $current_thread_info in tracepoint condition and action will get the
+return of current_thread_info().
+Access $cpu_id in tracepoint condition and action will get the return of
+smp_processor_id().
+Access $clock in tracepoint condition and action will get the return of
+local_clock() that return the timestamp in nanoseconds.
+
+And KGTP have other special trace state variables $dump_stack, $printk_level,
+$printk_format and $printk_tmp, all of them are for output value directly that
+will introduce in "Howto let tracepoint output value directly".
+
+Following example will count process 16663 call how many sys_read in $c
+and collect the struct thread_info of current task:
+
+--------------------------------------------------------------------------------
+(gdb) trace vfs_read if ((*(struct task_struct *)$current_task)->pid == 16663)
+(gdb) tvariable $c
+(gdb) actions
+Enter actions for tracepoint 4, one per line.
+End with a line saying just "end".
+>teval $c=$c+1
+>collect (*(struct thread_info *)$current_thread_info)
+>end
+(gdb) tstart
+(gdb) info tvariables
+Name Initial Current
+$c 0 184
+$current_task 0 <unknown>
+$current_thread_info 0 <unknown>
+$cpu_id 0 <unknown>
+(gdb) tstop
+(gdb) tfind
+(gdb) p *(struct thread_info *)$current_thread_info
+$10 = {task = 0xf0ac6580, exec_domain = 0xc07b1400, flags = 0, status
= 0, cpu = 1, preempt_count = 2, addr_limit = {
+ seg = 4294967295}, restart_block = {fn = 0xc0159fb0
<do_no_restart_syscall>, {{arg0 = 138300720, arg1 = 11,
+ arg2 = 1, arg3 = 78}, futex = {uaddr = 0x83e4d30, val = 11,
flags = 1, bitset = 78, time = 977063750,
+ uaddr2 = 0x0}, nanosleep = {index = 138300720, rmtp = 0xb,
expires = 335007449089}, poll = {
+ ufds = 0x83e4d30, nfds = 11, has_timeout = 1, tv_sec = 78,
tv_nsec = 977063750}}},
+ sysenter_return = 0xb77ce424, previous_esp = 0, supervisor_stack =
0xef340044 "", uaccess_err = 0}
+--------------------------------------------------------------------------------
+
+nother example can show how much sys_read() execute in each cpu.
+
+--------------------------------------
+tvariable $c0
+tvariable $c1
+trace sys_read
+ condition $bpnum ($cpu_id == 0)
+ commands
+ teval $c0=$c0+1
+ end
+trace sys_read
+ condition $bpnum ($cpu_id == 1)
+ commands
+ teval $c1=$c1+1
+ end
+info tvariables
+Name Initial Current
+$current_task 0 <unknown>
+$cpu_id 0 <unknown>
+$c0 0 3255
+$c1 0 1904
+--------------------------------------
+
+sys_read() execute 3255 times in cpu0 and 1904 times in cpu1.
+
+
+
+Show all the traced data of current frame
+-----------------------------------------
+
+--------------------------------------------------------------------------------
+(gdb) tdump
+Data collected at tracepoint 1, trace frame 0:
+$cr = void
+file->f_path.dentry->d_iname =
"gtp\000.google.chrome.g05ZYO\000\235", <incomplete sequence \364>
+jiffies_64 = 4319751455
+--------------------------------------------------------------------------------
+
+
+
+Get backtrace info from Kernel
+------------------------------
+
+We can get the backtrace through collect the stack.
+In x86_32, following action command will collect 512 bytes of stack.
+
+-----------------------------------
+collect *(unsigned char *)$esp@512
+-----------------------------------
+
+In x86_64, following command will collect 512 bytes of stack.
+
+-----------------------------------
+collect *(unsigned char *)$rsp@512
+-----------------------------------
+
+In MIPS or ARM, following command will collect 512 bytes of stack.
+----------------------------------
+collect *(unsigned char *)$sp@512
+-----------------------------------
+
+Following part is an example about howto backtrace in x86_64:
+
+--------------------------------------------------------------------------------
+(gdb) trace vfs_readdir
+Tracepoint 1 at 0xffffffff8113f7fc: file
/home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
+(gdb) actions
+Enter actions for tracepoint 1, one per line.
+End with a line saying just "end".
+>collect *(unsigned char *)$rsp@512
+>end
+(gdb) tstart
+(gdb) shell ls
+2 block firmware i ipc Makefile
modules.order scripts source t~ vmlinux
+a.out crypto fs include kernel mm
Module.symvers security System.map usr vmlinux.o
+arch drivers gdb.txt init lib modules.builtin net
sound t virt
+(gdb) tstop
+(gdb) tfind
+Found trace frame 0, tracepoint 1
+#0 0xffffffff8113f7fd in vfs_readdir (file=0xffff880075f00780,
filler=0xffffffff8113f630 <filldir>, buf=0xffff880005785f38)
+ at ./linux-2.6/fs/readdir.c:24
+24 {
+(gdb) bt
+#0 0xffffffff8113f7fd in vfs_readdir (file=0xffff880075f00780,
filler=0xffffffff8113f630 <filldir>, buf=0xffff880005785f38)
+ at ./linux-2.6/fs/readdir.c:24
+#1 0xffffffff8113fa14 in sys_getdents (fd=<value optimized out>,
dirent=0x801108, count=32768)
+ at ./linux-2.6/fs/readdir.c:214
+#2 0xffffffff8100af42 in ?? () at ./linux-2.6/arch/x86/kernel/entry_64.S:487
+--------------------------------------------------------------------------------
+
+
+
+Howto let tracepoint output value directly
+------------------------------------------
+
+In the previous parts, you can get that to get the value from Linux Kernel you
+need use tracepoint action "collect" save value to the tracepoint frame and
+use GDB command "tfind" parse the the value out from the frame.
+But we want get the value directly sometime, so KGTP support two ways to output
+value directly.
+
+
+Output stack dump directly
+--------------------------
+KGTP have special trace state variables $dump_stack, "collect" it will let
+Linux Kernel output stack dump directly.
+
+Following example let Linux Kernel show the stack dump of vfs_readdir:
+
+--------------------------------------------------------------------------------
+trace vfs_readdir
+ commands
+ collect $dump_stack
+ end
+--------------------------------------------------------------------------------
+
+Then your kernel will printk like:
+
+--------------------------------------------------------------------------------
+[22779.208064] gtp 1:Pid: 441, comm: python Not tainted 2.6.39-rc3+ #46
+[22779.208068] Call Trace:
+[22779.208072] [<fe653cca>] gtp_get_var+0x4a/0xa0 [gtp]
+[22779.208076] [<fe653d79>] gtp_collect_var+0x59/0xa0 [gtp]
+[22779.208080] [<fe655974>] gtp_action_x+0x1bb4/0x1dc0 [gtp]
+[22779.208084] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
+[22779.208088] [<c023f152>] ? __find_get_block_slow+0xd2/0x160
+[22779.208091] [<c01a8c56>] ? delayacct_end+0x96/0xb0
+[22779.208100] [<c023f404>] ? __find_get_block+0x84/0x1d0
+[22779.208103] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
+[22779.208106] [<c02e0838>] ? find_revoke_record+0xa8/0xc0
+[22779.208109] [<c02e0c45>] ? jbd2_journal_cancel_revoke+0xd5/0xe0
+[22779.208112] [<c02db51f>] ? __jbd2_journal_temp_unlink_buffer+0x2f/0x110
+[22779.208115] [<fe655c4c>] gtp_kp_pre_handler+0xcc/0x1c0 [gtp]
+[22779.208118] [<c05b8a88>] kprobe_exceptions_notify+0x3d8/0x440
+[22779.208121] [<c05b7d54>] ? hw_breakpoint_exceptions_notify+0x14/0x180
+[22779.208124] [<c05b95eb>] ? sub_preempt_count+0x7b/0xb0
+[22779.208126] [<c0227ac5>] ? vfs_readdir+0x15/0xb0
+[22779.208128] [<c0227ac4>] ? vfs_readdir+0x14/0xb0
+[22779.208131] [<c05b9743>] notifier_call_chain+0x43/0x60
+[22779.208134] [<c05b9798>] __atomic_notifier_call_chain+0x38/0x50
+[22779.208137] [<c05b97cf>] atomic_notifier_call_chain+0x1f/0x30
+[22779.208140] [<c05b980d>] notify_die+0x2d/0x30
+[22779.208142] [<c05b71c5>] do_int3+0x35/0xa0
+--------------------------------------------------------------------------------
+
+
+Switch collect to output the value directly
+-------------------------------------------
+
+KGTP have special trace state variables $printk_level, $printk_format
+and $printk_tmp to support this function.
+
+$printk_level, if its value is 8 (this is the default value), "collect" will
+save value to the tracepoint frame.
+If its value is 0-7, "collect" will output the value through "printk" directly,
+and value will be the level of printk. The level is:
+0 KERN_EMERG system is unusable
+1 KERN_ALERT action must be taken immediately
+2 KERN_CRIT critical conditions
+3 KERN_ERR error conditions
+4 KERN_WARNING warning conditions
+5 KERN_NOTICE normal but significant condition
+6 KERN_INFO informational
+7 KERN_DEBUG debug-level messages
+
+$printk_format, collect printk will output value in the format that set by it.
+The format is:
+0 This is the default value.
+ If the size of collect value is 1, 2, 4 or 8, it will be outputted as
+ a unsigned decimal.
+ If not, it will be outputted as a hexadecimal string.
+1 Output value in signed decimal.
+2 Output value in unsigned decimal.
+3 Output value in unsigned hexadecimal.
+4 Output value as a string.
+5 Output value as a hexadecimal string.
+
+$printk_tmp, to output the value of global variable need set to it first.
+
+Following example show the a count number, pid, jiffies_64 and the file name
+that call vfs_readdir:
+
+--------------------------------------------------------------------------------
+tvariable $c
+trace vfs_readdir
+ commands
+ teval $printk_level=0
+ collect $c=$c+1
+ collect (*(struct task_struct *)$current_task)->pid
+ collect $printk_tmp=jiffies_64
+ teval $printk_format=4
+ collect file->f_path.dentry->d_iname
+ end
+--------------------------------------------------------------------------------
+
+Then your kernel will printk like:
+
+--------------------------------------------------------------------------------
+gtp 1:$c=$c+1=41
+gtp 1:(*(struct task_struct *)$current_task)->pid=12085
+gtp 1:$printk_tmp=jiffies_64=4322021438
+gtp 1:file->f_path.dentry->d_iname=b26
+gtp 1:$c=$c+1=42
+gtp 1:(*(struct task_struct *)$current_task)->pid=12085
+gtp 1:$printk_tmp=jiffies_64=4322021438
+gtp 1:file->f_path.dentry->d_iname=b26
+--------------------------------------------------------------------------------
+
+"gtp 1" mean that it output by tracepoint 1.
+
+
+Use printf command in actions
+-----------------------------
+
+This way have a trouble is GDB is still not accept the patch that make
+tracepoint support printf, So if you want use it, you need patch the patch in
+http://sourceware.org/ml/gdb-patches/2011-03/msg00022.html and build your
+GDB with yourself.
+
+Following example show the a count number, pid and the file name that call
+vfs_readdir:
+
+--------------------------------------------------------------------------------
+tvariable $c
+trace vfs_readdir
+ commands
+ printf "<0>%d pid=%d name:%s\n", $c=$c+1, (*(struct task_struct
*)$current_task)->pid, file->f_path.dentry->d_iname
+ end
+--------------------------------------------------------------------------------
+
+Then your kernel will printk like:
+
+--------------------------------------------------------------------------------
+1 pid=10888 name:bin
+2 pid=10888 name:bin
+3 pid=10893 name:teawater
+4 pid=10893 name:teawater
+--------------------------------------------------------------------------------
+
+Like what we use printk in Linux Kernel, please add kernel loglevel
in the begin
+and add "\n" in the end.
+The kernel loglevel is:
+KERN_EMERG "<0>" system is unusable
+KERN_ALERT "<1>" action must be taken immediately
+KERN_CRIT "<2>" critical conditions
+KERN_ERR "<3>" error conditions
+KERN_WARNING "<4>" warning conditions
+KERN_NOTICE "<5>" normal but significant condition
+KERN_INFO "<6>" informational
+KERN_DEBUG "<7>" debug-level messages
+
+
+
+Get status of KGTP from Kernel
+------------------------------
+Please use GDB command "tstatus"
+
+
+
+Set the trace buffer into a circular buffer
+-------------------------------------------
+http://sourceware.org/gdb/current/onlinedocs/gdb/Starting-and-Stopping-Trace-Experiments.html
+The frame buffer is not a circular buffer by default. When the buffer is full,
+the tracepoint will stop.
+
+-----------------------------
+set circular-trace-buffer on
+-----------------------------
+
+Set frame buffer to a circular buffer. When the buffer is full, it will auto
+discard traceframes (oldest first) and keep trace.
+
+
+
+Do not stop tracepoint when the GDB disconnect
+----------------------------------------------
+
+http://sourceware.org/gdb/current/onlinedocs/gdb/Starting-and-Stopping-Trace-Experiments.html
+The KGTP will stop and delete the trace frame when GDB disconnect with it by
+default.
+
+----------------------------
+set disconnected-tracing on
+----------------------------
+will open the KGTP disconnect-trace. After that, when GDB disconnect with KGTP,
+KGTP will not stop trace. And after GDB reconnect to KGTP, it can keep control
+the KGTP like nothing happen.
+
+
+
+Howto show the variable that value of it is optimized
+-----------------------------------------------------
+
+Sometimes, GDB will output some value like:
+
+-------------------------------------------
+inode has been optimized out of existence.
+res has been optimized out of existence.
+-------------------------------------------
+
+That is because value of inode and res is optimized. Linux Kernel is built
+with -O2 so you will get this trouble sometimes.
+There are 2 ways to handle it:
+
+Linux kernel "Compile with almost no optimization" patch
+--------------------------------------------------------
+If you do not care about the speed when you debug the Kernel, you can use the
+patch for Linux Kernel in
+http://code.google.com/p/kgtp/downloads/detail?name=co.patch It add a option
+in "Kernel hacking" called "Compile with almost no optimization". It will make
+kernel be built without -O2. It support x86_32, x86_64 and arm.
+
+Update your GCC
+---------------
+The VTA branch(http://gcc.gnu.org/wiki/Var_Tracking_Assignments) was merged
+for GCC 4.5 Which helps a lot with generating dwarf for previously
+"optimized out" values.
+
+
+
+Offline debug
+-------------
+
+In the PC that can run the GDB:
+Change the "target remote XXXX" to
+
+------------------------------------------
+(gdb) target remote | perl ./getgtprsp.pl
+------------------------------------------.
+
+After that, set tracepoint and start it as usual:
+
+--------------------------------------------------------------------------------
+(gdb) trace vfs_readdir
+Tracepoint 1 at 0xffffffff8114f3c0: file
/home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
+(gdb) actions
+Enter actions for tracepoint 1, one per line.
+End with a line saying just "end".
+#If your GDB support tracepoint "printf" (see "Howto use tracepoint
printf"), use it to show the value directly is better.
+>collect $reg
+>end
+(gdb) tstart
+(gdb) stop
+(gdb) quit
+--------------------------------------------------------------------------------
+
+Then you can find files gtpstart and gtpstop. Copy it to the machine that you
+want debug.
+
+
+In the debuged machine after insmod the gtp.ko:
+Start the tracepoint:
+
+------------------------------------
+cat gtpstart > /sys/kernel/debug/gtp
+------------------------------------
+
+Stop the tracepoint:
+
+-----------------------------------
+cat gtpstop > /sys/kernel/debug/gtp
+-----------------------------------
+
+You can let Linux Kernel show the value directly, please see "Howto let
+tracepoint output value directly".
+
+If you want save the value to the trace frame and parse later, you can use file
+"/sys/kernel/debug/gtpframe" that have the trace frame. Copy it to the PC that
+has GDB.
+
+In the PC that can run the GDB:
+
+--------------------------------------------------------------------------------
+(gdb) target tfile ./gtpframe
+Tracepoint 1 at 0xffffffff8114f3dc: file
/home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
+Created tracepoint 1 for target's tracepoint 1 at 0xffffffff8114f3c0.
+(gdb) tfind
+Found trace frame 0, tracepoint 1
+#0 vfs_readdir (file=0xffff880036e8f300, filler=0xffffffff8114f240
<filldir>, buf=0xffff880001e5bf38)
+ at /home/teawater/kernel/linux-2.6/fs/readdir.c:24
+24 {
+--------------------------------------------------------------------------------
--- /dev/null
+++ b/arch/arm/include/asm/gtp.h
@@ -0,0 +1,13 @@
+#ifndef _ASM_ARM_GTP_H_
+#define _ASM_ARM_GTP_H_
+
+#define ULONGEST uint64_t
+#define LONGEST int64_t
+#define CORE_ADDR unsigned long
+
+#define GTP_REGS_PC(regs) ((regs)->uregs[15])
+
+#define GTP_REG_ASCII_SIZE 336
+#define GTP_REG_BIN_SIZE 168
+
+#endif
--- /dev/null
+++ b/arch/mips/include/asm/gtp.h
@@ -0,0 +1,18 @@
+#ifndef _ASM_MIPS_GTP_H_
+#define _ASM_MIPS_GTP_H_
+
+#define ULONGEST uint64_t
+#define LONGEST int64_t
+#define CORE_ADDR unsigned long
+
+#define GTP_REGS_PC(regs) ((regs)->cp0_epc)
+
+#ifdef CONFIG_32BIT
+#define GTP_REG_ASCII_SIZE 304
+#define GTP_REG_BIN_SIZE 152
+#else
+#define GTP_REG_ASCII_SIZE 608
+#define GTP_REG_BIN_SIZE 304
+#endif
+
+#endif
--- /dev/null
+++ b/arch/x86/include/asm/gtp.h
@@ -0,0 +1,18 @@
+#ifndef _ASM_X86_GTP_H_
+#define _ASM_X86_GTP_H_
+
+#define ULONGEST uint64_t
+#define LONGEST int64_t
+#define CORE_ADDR unsigned long
+
+#define GTP_REGS_PC(regs) ((regs)->ip)
+
+#ifdef CONFIG_X86_32
+#define GTP_REG_ASCII_SIZE 128
+#define GTP_REG_BIN_SIZE 64
+#else
+#define GTP_REG_ASCII_SIZE 296
+#define GTP_REG_BIN_SIZE 148
+#endif
+
+#endif
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1253,6 +1253,15 @@ config ASYNC_RAID6_TEST
If unsure, say N.
+config GTP
+ tristate "GDB tracepoint support"
+ depends on X86 || ARM || MIPS
+ depends on KPROBES
+ depends on DEBUG_FS
+ ---help---
+ Supply GDB tracepoint interface in /sys/kernel/debug/gtp.
+ See https://code.google.com/p/kgtp/wiki/HOWTO
+
source "samples/Kconfig"
source "lib/Kconfig.kgdb"
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -115,6 +115,8 @@ obj-$(CONFIG_AVERAGE) += average.o
obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
+obj-$(CONFIG_GTP) += gtp.o
+
hostprogs-y := gen_crc32table
clean-files := crc32table.h
--- /dev/null
+++ b/lib/gtp.c
@@ -0,0 +1,5104 @@
+/*
+ * Kernel GDB tracepoint module.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright(C) Hui Zhu ([email protected]), 2010, 2011
+ */
+
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include <linux/poll.h>
+#include <linux/kprobes.h>
+#include <linux/debugfs.h>
+#include <asm/gtp.h>
+
+#define KERN_NULL
+
+#ifdef GTPDEBUG
+#define GTP_DEBUG KERN_WARNING
+#endif
+
+#define GTP_RW_MAX 16384
+
+#define FRAME_ALIGN_SIZE sizeof(unsigned int)
+#define FRAME_ALIGN(x) ((x + FRAME_ALIGN_SIZE - 1) \
+ & (~(FRAME_ALIGN_SIZE - 1)))
+
+#define FID_TYPE unsigned int
+#define FID_SIZE sizeof(FID_TYPE)
+#define FID(x) (*((FID_TYPE *)x))
+#define FID_HEAD 0
+#define FID_REG 1
+#define FID_MEM 2
+#define FID_VAR 3
+#define FID_END 4
+
+/* GTP_FRAME_SIZE must align with FRAME_ALIGN_SIZE. */
+#define GTP_FRAME_SIZE 5242880
+#define GTP_FRAME_HEAD_SIZE (FID_SIZE + sizeof(char *) + sizeof(ULONGEST))
+#define GTP_FRAME_REG_SIZE (FID_SIZE + sizeof(char *) \
+ + sizeof(struct pt_regs))
+#define GTP_FRAME_MEM_SIZE (FID_SIZE + sizeof(char *) \
+ + sizeof(struct gtp_frame_mem))
+#define GTP_FRAME_VAR_SIZE (FID_SIZE + sizeof(char *) \
+ + sizeof(struct gtp_frame_var))
+
+#define TOHEX(h) ((h) > 9 ? (h) + 'a' - 10 : (h) + '0')
+
+struct action_agent_exp {
+ unsigned int size;
+ uint8_t *buf;
+ int need_var_lock;
+};
+
+struct action_m {
+ int regnum;
+ CORE_ADDR offset;
+ size_t size;
+};
+
+struct action {
+ struct action *next;
+ unsigned char type;
+ char *src;
+ union {
+ ULONGEST reg_mask;
+ struct action_agent_exp exp;
+ struct action_m m;
+ } u;
+};
+
+struct gtpsrc {
+ struct gtpsrc *next;
+ char *src;
+};
+
+enum gtp_stop_type {
+ gtp_stop_normal = 0,
+ gtp_stop_frame_full,
+ gtp_stop_efault,
+ gtp_stop_access_wrong_reg,
+ gtp_stop_agent_expr_code_error,
+ gtp_stop_agent_expr_stack_overflow,
+};
+
+struct gtp_entry {
+ struct gtp_entry *next;
+ int disable;
+ ULONGEST num;
+ ULONGEST addr;
+ ULONGEST step;
+ ULONGEST pass;
+ int nopass;
+ atomic_t current_pass;
+ int kpreg;
+ struct kprobe kp;
+ struct work_struct work;
+ enum gtp_stop_type reason;
+ struct action *cond;
+ struct action *action_list;
+ struct gtpsrc *src;
+ int have_printk;
+ struct gtpsrc *printk_str;
+};
+
+struct gtp_var {
+ struct gtp_var *next;
+ unsigned int num;
+ uint64_t val;
+ char *src;
+};
+
+struct gtp_frame_mem {
+ CORE_ADDR addr;
+ size_t size;
+};
+
+struct gtp_frame_var {
+ unsigned int num;
+ uint64_t val;
+};
+
+struct gtpro_entry {
+ struct gtpro_entry *next;
+ CORE_ADDR start;
+ CORE_ADDR end;
+};
+
+static struct gtp_entry *gtp_list;
+static struct gtp_entry *current_gtp;
+static struct action *current_gtp_action;
+static struct gtpsrc *current_gtp_src;
+
+static struct workqueue_struct *gtp_wq;
+
+static char gtp_read_ack;
+static char *gtp_rw_buf;
+static char *gtp_rw_bufp;
+static size_t gtp_rw_size;
+
+static int gtp_start;
+
+static int gtp_disconnected_tracing;
+static int gtp_circular;
+
+static DEFINE_SPINLOCK(gtp_var_lock);
+static struct gtp_var *gtp_var_list;
+static unsigned int gtp_var_head;
+static unsigned int gtp_var_tail;
+static struct gtp_var **gtp_var_array;
+static struct gtp_var *current_gtp_var;
+#define GTP_VAR_CURRENT_TASK_ID 1
+static struct gtp_var gtp_var_current_task = {
+ .next = NULL,
+ .num = GTP_VAR_CURRENT_TASK_ID,
+ .src = "0:1:63757272656e745f7461736b",
+};
+#define GTP_VAR_CURRENT_THREAD_INFO_ID 2
+static struct gtp_var gtp_var_current_thread_info = {
+ .next = >p_var_current_task,
+ .num = GTP_VAR_CURRENT_THREAD_INFO_ID,
+ .src = "0:1:63757272656e745f7468726561645f696e666f",
+};
+#define GTP_VAR_CLOCK_ID 3
+static struct gtp_var gtp_var_clock = {
+ .next = >p_var_current_thread_info,
+ .num = GTP_VAR_CLOCK_ID,
+ .src = "0:1:636c6f636b",
+};
+#define GTP_VAR_CPU_ID 4
+static struct gtp_var gtp_var_cpu_id = {
+ .next = >p_var_clock,
+ .num = GTP_VAR_CPU_ID,
+ .src = "0:1:6370755f6964",
+};
+#define GTP_VAR_PRINTK_TMP_ID 5
+static struct gtp_var gtp_var_printk_tmp = {
+ .next = >p_var_cpu_id,
+ .num = GTP_VAR_PRINTK_TMP_ID,
+ .src = "0:1:7072696e746b5f746d70",
+};
+#define GTP_VAR_PRINTK_LEVEL_ID 6
+static struct gtp_var gtp_var_printk_level = {
+ .next = >p_var_printk_tmp,
+ .num = GTP_VAR_PRINTK_LEVEL_ID,
+ .src = "8:1:7072696e746b5f6c6576656c",
+};
+#define GTP_VAR_PRINTK_FORMAT_ID 7
+static struct gtp_var gtp_var_printk_format = {
+ .next = >p_var_printk_level,
+ .num = GTP_VAR_PRINTK_FORMAT_ID,
+ .src = "0:1:7072696e746b5f666f726d6174",
+};
+#define GTP_VAR_DUMP_STACK_ID 8
+static struct gtp_var gtp_var_dump_stack = {
+ .next = >p_var_printk_format,
+ .num = GTP_VAR_DUMP_STACK_ID,
+ .src = "0:1:64756d705f737461636b",
+};
+#define GTP_VAR_LIST_FIRST (>p_var_dump_stack)
+#define GTP_VAR_SPECIAL_MIN GTP_VAR_CURRENT_TASK_ID
+#define GTP_VAR_SPECIAL_MAX GTP_VAR_DUMP_STACK_ID
+#define GTP_VAR_IS_SPECIAL(x) ((x) >= GTP_VAR_SPECIAL_MIN \
+ && (x) <= GTP_VAR_SPECIAL_MAX)
+#define GTP_VAR_NOT_GETV(x) ((x) == GTP_VAR_PRINTK_LEVEL_ID \
+ || (x) == GTP_VAR_PRINTK_FORMAT_ID)
+#define GTP_VAR_NOT_SETV(x) (((x) >= GTP_VAR_CURRENT_TASK_ID \
+ && (x) <= GTP_VAR_CPU_ID) \
+ || (x) == GTP_VAR_DUMP_STACK_ID)
+#define GTP_VAR_NOT_TRACEV(x) ((x) >= GTP_VAR_PRINTK_LEVEL_ID \
+ && (x) <= GTP_VAR_PRINTK_FORMAT_ID)
+
+static DEFINE_SPINLOCK(gtp_frame_lock);
+static char *gtp_frame;
+static char *gtp_frame_r_start;
+static char *gtp_frame_w_start;
+static char *gtp_frame_end;
+static int gtp_frame_is_circular;
+static char *gtp_frame_current;
+static int gtp_frame_current_num;
+static atomic_t gtp_frame_create;
+static char *gtp_frame_file;
+static size_t gtp_frame_file_size;
+
+static struct gtpro_entry *gtpro_list;
+
+#define GTP_PRINTF_MAX 256
+static DEFINE_PER_CPU(char[GTP_PRINTF_MAX], gtp_printf);
+
+#ifdef CONFIG_X86
+static ULONGEST
+gtp_action_reg_read(struct pt_regs *regs, struct gtp_entry *tpe, int num)
+{
+ ULONGEST ret;
+
+ switch (num) {
+#ifdef CONFIG_X86_32
+ case 0:
+ ret = regs->ax;
+ break;
+ case 1:
+ ret = regs->cx;
+ break;
+ case 2:
+ ret = regs->dx;
+ break;
+ case 3:
+ ret = regs->bx;
+ break;
+ case 4:
+ ret = (ULONGEST)(CORE_ADDR)®s->sp;
+ break;
+ case 5:
+ ret = regs->bp;
+ break;
+ case 6:
+ ret = regs->si;
+ break;
+ case 7:
+ ret = regs->di;
+ break;
+ case 8:
+ ret = regs->ip - 1;
+ break;
+ case 9:
+ ret = regs->flags;
+ break;
+ case 10:
+ ret = regs->cs;
+ break;
+ case 11:
+ ret = regs->ss;
+ break;
+ case 12:
+ ret = regs->ds;
+ break;
+ case 13:
+ ret = regs->es;
+ break;
+ case 14:
+ ret = regs->fs;
+ break;
+ case 15:
+ ret = regs->gs;
+ break;
+#else
+ case 0:
+ ret = regs->ax;
+ break;
+ case 1:
+ ret = regs->bx;
+ break;
+ case 2:
+ ret = regs->cx;
+ break;
+ case 3:
+ ret = regs->dx;
+ break;
+ case 4:
+ ret = regs->si;
+ break;
+ case 5:
+ ret = regs->di;
+ break;
+ case 6:
+ ret = regs->bp;
+ break;
+ case 7:
+ ret = regs->sp;
+ break;
+ case 8:
+ ret = regs->r8;
+ break;
+ case 9:
+ ret = regs->r9;
+ break;
+ case 10:
+ ret = regs->r10;
+ break;
+ case 11:
+ ret = regs->r11;
+ break;
+ case 12:
+ ret = regs->r12;
+ break;
+ case 13:
+ ret = regs->r13;
+ break;
+ case 14:
+ ret = regs->r14;
+ break;
+ case 15:
+ ret = regs->r15;
+ break;
+ case 16:
+ ret = regs->ip - 1;
+ break;
+ case 17:
+ ret = regs->flags;
+ break;
+ case 18:
+ ret = regs->cs;
+ break;
+ case 19:
+ ret = regs->ss;
+ break;
+#endif
+ default:
+ ret = 0;
+ tpe->reason = gtp_stop_access_wrong_reg;
+ break;
+ }
+
+ return ret;
+}
+
+static void
+gtp_regs2ascii(struct pt_regs *regs, char *buf)
+{
+#ifdef CONFIG_X86_32
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_regs2ascii: ax = 0x%x\n",
+ (unsigned int) regs->ax);
+ printk(GTP_DEBUG "gtp_regs2ascii: cx = 0x%x\n",
+ (unsigned int) regs->cx);
+ printk(GTP_DEBUG "gtp_regs2ascii: dx = 0x%x\n",
+ (unsigned int) regs->dx);
+ printk(GTP_DEBUG "gtp_regs2ascii: bx = 0x%x\n",
+ (unsigned int) regs->bx);
+ printk(GTP_DEBUG "gtp_regs2ascii: sp = 0x%x\n",
+ (unsigned int) regs->sp);
+ printk(GTP_DEBUG "gtp_regs2ascii: bp = 0x%x\n",
+ (unsigned int) regs->bp);
+ printk(GTP_DEBUG "gtp_regs2ascii: si = 0x%x\n",
+ (unsigned int) regs->si);
+ printk(GTP_DEBUG "gtp_regs2ascii: di = 0x%x\n",
+ (unsigned int) regs->di);
+ printk(GTP_DEBUG "gtp_regs2ascii: ip = 0x%x\n",
+ (unsigned int) regs->ip);
+ printk(GTP_DEBUG "gtp_regs2ascii: flags = 0x%x\n",
+ (unsigned int) regs->flags);
+ printk(GTP_DEBUG "gtp_regs2ascii: cs = 0x%x\n",
+ (unsigned int) regs->cs);
+ printk(GTP_DEBUG "gtp_regs2ascii: ss = 0x%x\n",
+ (unsigned int) regs->ss);
+ printk(GTP_DEBUG "gtp_regs2ascii: ds = 0x%x\n",
+ (unsigned int) regs->ds);
+ printk(GTP_DEBUG "gtp_regs2ascii: es = 0x%x\n",
+ (unsigned int) regs->es);
+ printk(GTP_DEBUG "gtp_regs2ascii: fs = 0x%x\n",
+ (unsigned int) regs->fs);
+ printk(GTP_DEBUG "gtp_regs2ascii: gs = 0x%x\n",
+ (unsigned int) regs->gs);
+#endif
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->ax));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->cx));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->dx));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->bx));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->sp));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->bp));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->si));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->di));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->ip));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->flags));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->cs));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->ss));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->ds));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->es));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->fs));
+ buf += 8;
+ sprintf(buf, "%08x", (unsigned int) swab32(regs->gs));
+ buf += 8;
+#else
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_regs2ascii: ax = 0x%lx\n", regs->ax);
+ printk(GTP_DEBUG "gtp_regs2ascii: bx = 0x%lx\n", regs->bx);
+ printk(GTP_DEBUG "gtp_regs2ascii: cx = 0x%lx\n", regs->cx);
+ printk(GTP_DEBUG "gtp_regs2ascii: dx = 0x%lx\n", regs->dx);
+ printk(GTP_DEBUG "gtp_regs2ascii: si = 0x%lx\n", regs->si);
+ printk(GTP_DEBUG "gtp_regs2ascii: di = 0x%lx\n", regs->di);
+ printk(GTP_DEBUG "gtp_regs2ascii: bp = 0x%lx\n", regs->bp);
+ printk(GTP_DEBUG "gtp_regs2ascii: sp = 0x%lx\n", regs->sp);
+ printk(GTP_DEBUG "gtp_regs2ascii: r8 = 0x%lx\n", regs->r8);
+ printk(GTP_DEBUG "gtp_regs2ascii: r9 = 0x%lx\n", regs->r9);
+ printk(GTP_DEBUG "gtp_regs2ascii: r10 = 0x%lx\n", regs->r10);
+ printk(GTP_DEBUG "gtp_regs2ascii: r11 = 0x%lx\n", regs->r11);
+ printk(GTP_DEBUG "gtp_regs2ascii: r12 = 0x%lx\n", regs->r12);
+ printk(GTP_DEBUG "gtp_regs2ascii: r13 = 0x%lx\n", regs->r13);
+ printk(GTP_DEBUG "gtp_regs2ascii: r14 = 0x%lx\n", regs->r14);
+ printk(GTP_DEBUG "gtp_regs2ascii: r15 = 0x%lx\n", regs->r15);
+ printk(GTP_DEBUG "gtp_regs2ascii: ip = 0x%lx\n", regs->ip);
+ printk(GTP_DEBUG "gtp_regs2ascii: flags = 0x%lx\n", regs->flags);
+ printk(GTP_DEBUG "gtp_regs2ascii: cs = 0x%lx\n", regs->cs);
+ printk(GTP_DEBUG "gtp_regs2ascii: ss = 0x%lx\n", regs->ss);
+#endif
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->ax));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->bx));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->cx));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->dx));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->si));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->di));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->bp));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->sp));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->r8));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->r9));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->r10));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->r11));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->r12));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->r13));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->r14));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->r15));
+ buf += 16;
+ sprintf(buf, "%016lx", (unsigned long) swab64(regs->ip));
+ buf += 16;
+ sprintf(buf, "%08x",
+ (unsigned int) swab32((unsigned int)regs->flags));
+ buf += 8;
+ sprintf(buf, "%08x",
+ (unsigned int) swab32((unsigned int)regs->cs));
+ buf += 8;
+ sprintf(buf, "%08x",
+ (unsigned int) swab32((unsigned int)regs->ss));
+ buf += 8;
+#endif
+}
+
+static void
+gtp_regs2bin(struct pt_regs *regs, char *buf)
+{
+#ifdef CONFIG_X86_32
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_regs2ascii: ax = 0x%x\n",
+ (unsigned int) regs->ax);
+ printk(GTP_DEBUG "gtp_regs2ascii: cx = 0x%x\n",
+ (unsigned int) regs->cx);
+ printk(GTP_DEBUG "gtp_regs2ascii: dx = 0x%x\n",
+ (unsigned int) regs->dx);
+ printk(GTP_DEBUG "gtp_regs2ascii: bx = 0x%x\n",
+ (unsigned int) regs->bx);
+ printk(GTP_DEBUG "gtp_regs2ascii: sp = 0x%x\n",
+ (unsigned int) regs->sp);
+ printk(GTP_DEBUG "gtp_regs2ascii: bp = 0x%x\n",
+ (unsigned int) regs->bp);
+ printk(GTP_DEBUG "gtp_regs2ascii: si = 0x%x\n",
+ (unsigned int) regs->si);
+ printk(GTP_DEBUG "gtp_regs2ascii: di = 0x%x\n",
+ (unsigned int) regs->di);
+ printk(GTP_DEBUG "gtp_regs2ascii: ip = 0x%x\n",
+ (unsigned int) regs->ip);
+ printk(GTP_DEBUG "gtp_regs2ascii: flags = 0x%x\n",
+ (unsigned int) regs->flags);
+ printk(GTP_DEBUG "gtp_regs2ascii: cs = 0x%x\n",
+ (unsigned int) regs->cs);
+ printk(GTP_DEBUG "gtp_regs2ascii: ss = 0x%x\n",
+ (unsigned int) regs->ss);
+ printk(GTP_DEBUG "gtp_regs2ascii: ds = 0x%x\n",
+ (unsigned int) regs->ds);
+ printk(GTP_DEBUG "gtp_regs2ascii: es = 0x%x\n",
+ (unsigned int) regs->es);
+ printk(GTP_DEBUG "gtp_regs2ascii: fs = 0x%x\n",
+ (unsigned int) regs->fs);
+ printk(GTP_DEBUG "gtp_regs2ascii: gs = 0x%x\n",
+ (unsigned int) regs->gs);
+#endif
+ memcpy(buf, ®s->ax, 4);
+ buf += 4;
+ memcpy(buf, ®s->cx, 4);
+ buf += 4;
+ memcpy(buf, ®s->dx, 4);
+ buf += 4;
+ memcpy(buf, ®s->bx, 4);
+ buf += 4;
+ memcpy(buf, ®s->sp, 4);
+ buf += 4;
+ memcpy(buf, ®s->bp, 4);
+ buf += 4;
+ memcpy(buf, ®s->si, 4);
+ buf += 4;
+ memcpy(buf, ®s->di, 4);
+ buf += 4;
+ memcpy(buf, ®s->ip, 4);
+ buf += 4;
+ memcpy(buf, ®s->flags, 4);
+ buf += 4;
+ memcpy(buf, ®s->cs, 4);
+ buf += 4;
+ memcpy(buf, ®s->ss, 4);
+ buf += 4;
+ memcpy(buf, ®s->ds, 4);
+ buf += 4;
+ memcpy(buf, ®s->es, 4);
+ buf += 4;
+ memcpy(buf, ®s->fs, 4);
+ buf += 4;
+ memcpy(buf, ®s->gs, 4);
+ buf += 4;
+#else
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_regs2ascii: ax = 0x%lx\n", regs->ax);
+ printk(GTP_DEBUG "gtp_regs2ascii: bx = 0x%lx\n", regs->bx);
+ printk(GTP_DEBUG "gtp_regs2ascii: cx = 0x%lx\n", regs->cx);
+ printk(GTP_DEBUG "gtp_regs2ascii: dx = 0x%lx\n", regs->dx);
+ printk(GTP_DEBUG "gtp_regs2ascii: si = 0x%lx\n", regs->si);
+ printk(GTP_DEBUG "gtp_regs2ascii: di = 0x%lx\n", regs->di);
+ printk(GTP_DEBUG "gtp_regs2ascii: bp = 0x%lx\n", regs->bp);
+ printk(GTP_DEBUG "gtp_regs2ascii: sp = 0x%lx\n", regs->sp);
+ printk(GTP_DEBUG "gtp_regs2ascii: r8 = 0x%lx\n", regs->r8);
+ printk(GTP_DEBUG "gtp_regs2ascii: r9 = 0x%lx\n", regs->r9);
+ printk(GTP_DEBUG "gtp_regs2ascii: r10 = 0x%lx\n", regs->r10);
+ printk(GTP_DEBUG "gtp_regs2ascii: r11 = 0x%lx\n", regs->r11);
+ printk(GTP_DEBUG "gtp_regs2ascii: r12 = 0x%lx\n", regs->r12);
+ printk(GTP_DEBUG "gtp_regs2ascii: r13 = 0x%lx\n", regs->r13);
+ printk(GTP_DEBUG "gtp_regs2ascii: r14 = 0x%lx\n", regs->r14);
+ printk(GTP_DEBUG "gtp_regs2ascii: r15 = 0x%lx\n", regs->r15);
+ printk(GTP_DEBUG "gtp_regs2ascii: ip = 0x%lx\n", regs->ip);
+ printk(GTP_DEBUG "gtp_regs2ascii: flags = 0x%lx\n", regs->flags);
+ printk(GTP_DEBUG "gtp_regs2ascii: cs = 0x%lx\n", regs->cs);
+ printk(GTP_DEBUG "gtp_regs2ascii: ss = 0x%lx\n", regs->ss);
+#endif
+ memcpy(buf, ®s->ax, 8);
+ buf += 8;
+ memcpy(buf, ®s->bx, 8);
+ buf += 8;
+ memcpy(buf, ®s->cx, 8);
+ buf += 8;
+ memcpy(buf, ®s->dx, 8);
+ buf += 8;
+ memcpy(buf, ®s->si, 8);
+ buf += 8;
+ memcpy(buf, ®s->di, 8);
+ buf += 8;
+ memcpy(buf, ®s->bp, 8);
+ buf += 8;
+ memcpy(buf, ®s->sp, 8);
+ buf += 8;
+ memcpy(buf, ®s->r8, 8);
+ buf += 8;
+ memcpy(buf, ®s->r9, 8);
+ buf += 8;
+ memcpy(buf, ®s->r10, 8);
+ buf += 8;
+ memcpy(buf, ®s->r11, 8);
+ buf += 8;
+ memcpy(buf, ®s->r12, 8);
+ buf += 8;
+ memcpy(buf, ®s->r13, 8);
+ buf += 8;
+ memcpy(buf, ®s->r14, 8);
+ buf += 8;
+ memcpy(buf, ®s->r15, 8);
+ buf += 8;
+ memcpy(buf, ®s->ip, 8);
+ buf += 8;
+ memcpy(buf, ®s->flags, 4);
+ buf += 4;
+ memcpy(buf, ®s->cs, 4);
+ buf += 4;
+ memcpy(buf, ®s->ss, 4);
+ buf += 4;
+#endif
+}
+#endif
+
+#ifdef CONFIG_MIPS
+static ULONGEST
+gtp_action_reg_read(struct pt_regs *regs, struct gtp_entry *tpe, int num)
+{
+ ULONGEST ret;
+
+ if (num > 90) {
+ /* GDB convert the reg number to a GDB
+ [1 * gdbarch_num_regs .. 2 * gdbarch_num_regs) REGNUM
+ in function mips_dwarf_dwarf2_ecoff_reg_to_regnum. */
+ num -= 90;
+ }
+
+ if (num >= 0 && num <= 31) {
+ ret = regs->regs[num];
+ } else {
+ switch (num) {
+ case 32:
+ ret = regs->cp0_status;
+ break;
+ case 33:
+ ret = regs->lo;
+ break;
+ case 34:
+ ret = regs->hi;
+ break;
+ case 35:
+ ret = regs->cp0_badvaddr;
+ break;
+ case 36:
+ ret = regs->cp0_cause;
+ break;
+ case 37:
+ ret = regs->cp0_epc;
+ break;
+ default:
+ ret = 0;
+ tpe->reason = gtp_stop_access_wrong_reg;
+ break;
+ }
+ }
+
+ return ret;
+};
+
+static void
+gtp_regs2ascii(struct pt_regs *regs, char *buf)
+{
+#ifdef GTP_DEBUG
+ {
+ int i;
+
+ for (i = 0; i < 32; i++)
+ printk(GTP_DEBUG "gtp_gdbrsp_g: r%d = 0x%lx\n", i,
+ regs->regs[i]);
+ }
+ printk(GTP_DEBUG "gtp_gdbrsp_g: status = 0x%lx\n",
+ regs->cp0_status);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: lo = 0x%lx\n", regs->lo);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: hi = 0x%lx\n", regs->hi);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: badvaddr = 0x%lx\n",
+ regs->cp0_badvaddr);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: cause = 0x%lx\n", regs->cp0_cause);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: pc = 0x%lx\n", regs->cp0_epc);
+#endif
+
+#ifdef CONFIG_32BIT
+#define OUTFORMAT "%08lx"
+#define REGSIZE 8
+#ifdef __LITTLE_ENDIAN
+#define SWAB(a) swab32(a)
+#else
+#define SWAB(a) (a)
+#endif
+#else
+#define OUTFORMAT "%016lx"
+#define REGSIZE 16
+#ifdef __LITTLE_ENDIAN
+#define SWAB(a) swab64(a)
+#else
+#define SWAB(a) (a)
+#endif
+#endif
+ {
+ int i;
+
+ for (i = 0; i < 32; i++) {
+ sprintf(buf, OUTFORMAT,
+ (unsigned long) SWAB(regs->regs[i]));
+ buf += REGSIZE;
+ }
+ }
+
+ sprintf(buf, OUTFORMAT,
+ (unsigned long) SWAB(regs->cp0_status));
+ buf += REGSIZE;
+ sprintf(buf, OUTFORMAT,
+ (unsigned long) SWAB(regs->lo));
+ buf += REGSIZE;
+ sprintf(buf, OUTFORMAT,
+ (unsigned long) SWAB(regs->hi));
+ buf += REGSIZE;
+ sprintf(buf, OUTFORMAT,
+ (unsigned long) SWAB(regs->cp0_badvaddr));
+ buf += REGSIZE;
+ sprintf(buf, OUTFORMAT,
+ (unsigned long) SWAB(regs->cp0_cause));
+ buf += REGSIZE;
+ sprintf(buf, OUTFORMAT,
+ (unsigned long) SWAB(regs->cp0_epc));
+ buf += REGSIZE;
+#undef OUTFORMAT
+#undef REGSIZE
+#undef SWAB
+}
+
+static void
+gtp_regs2bin(struct pt_regs *regs, char *buf)
+{
+#ifdef GTP_DEBUG
+ {
+ int i;
+
+ for (i = 0; i < 32; i++)
+ printk(GTP_DEBUG "gtp_gdbrsp_g: r%d = 0x%lx\n", i,
+ regs->regs[i]);
+ }
+ printk(GTP_DEBUG "gtp_gdbrsp_g: status = 0x%lx\n",
+ regs->cp0_status);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: lo = 0x%lx\n", regs->lo);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: hi = 0x%lx\n", regs->hi);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: badvaddr = 0x%lx\n",
+ regs->cp0_badvaddr);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: cause = 0x%lx\n", regs->cp0_cause);
+ printk(GTP_DEBUG "gtp_gdbrsp_g: pc = 0x%lx\n", regs->cp0_epc);
+#endif
+
+#ifdef CONFIG_32BIT
+#define REGSIZE 4
+#else
+#define REGSIZE 8
+#endif
+ {
+ int i;
+
+ for (i = 0; i < 32; i++) {
+ memcpy(buf, ®s->regs[i], REGSIZE);
+ buf += REGSIZE;
+ }
+ }
+ memcpy(buf, ®s->cp0_status, REGSIZE);
+ buf += REGSIZE;
+ memcpy(buf, ®s->lo, REGSIZE);
+ buf += REGSIZE;
+ memcpy(buf, ®s->hi, REGSIZE);
+ buf += REGSIZE;
+ memcpy(buf, ®s->cp0_badvaddr, REGSIZE);
+ buf += REGSIZE;
+ memcpy(buf, ®s->cp0_cause, REGSIZE);
+ buf += REGSIZE;
+ memcpy(buf, ®s->cp0_epc, REGSIZE);
+ buf += REGSIZE;
+#undef REGSIZE
+}
+#endif
+
+#ifdef CONFIG_ARM
+static ULONGEST
+gtp_action_reg_read(struct pt_regs *regs, struct gtp_entry *tpe, int num)
+{
+ if (num >= 0 && num < 16)
+ return regs->uregs[num];
+ else if (num == 25)
+ return regs->uregs[16];
+
+ tpe->reason = gtp_stop_access_wrong_reg;
+ return 0;
+}
+
+static void
+gtp_regs2ascii(struct pt_regs *regs, char *buf)
+{
+#ifdef __LITTLE_ENDIAN
+#define SWAB(a) swab32(a)
+#else
+#define SWAB(a) (a)
+#endif
+ int i;
+
+ for (i = 0; i < 16; i++) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_g: r%d = 0x%lx\n",
+ i, regs->uregs[i]);
+#endif
+ sprintf(buf, "%08lx", (unsigned long) SWAB(regs->uregs[i]));
+ buf += 8;
+ }
+
+ /* f0-f7 fps */
+ memset(buf, '0', 200);
+ buf += 200;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_g: cpsr = 0x%lx\n", regs->uregs[16]);
+#endif
+ sprintf(buf, "%08lx",
+ (unsigned long) SWAB(regs->uregs[16]));
+ buf += 8;
+#undef SWAB
+}
+
+static void
+gtp_regs2bin(struct pt_regs *regs, char *buf)
+{
+ int i;
+
+ for (i = 0; i < 16; i++) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_g: r%d = 0x%lx\n",
+ i, regs->uregs[i]);
+#endif
+ memcpy(buf, ®s->uregs[i], 4);
+ buf += 4;
+ }
+
+ /* f0-f7 fps */
+ memset(buf, '\0', 100);
+ buf += 100;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_g: cpsr = 0x%lx\n", regs->uregs[16]);
+#endif
+ memcpy(buf, ®s->uregs[16], 4);
+ buf += 4;
+}
+#endif
+
+static char *
+gtp_frame_next(char *frame)
+{
+ switch (FID(frame)) {
+ case FID_HEAD:
+ frame += FRAME_ALIGN(GTP_FRAME_HEAD_SIZE);
+ break;
+ case FID_REG:
+ frame += FRAME_ALIGN(GTP_FRAME_REG_SIZE);
+ break;
+ case FID_MEM: {
+ struct gtp_frame_mem *gfm;
+
+ gfm = (struct gtp_frame_mem *) (frame + FID_SIZE
+ + sizeof(char *));
+ frame += FRAME_ALIGN(GTP_FRAME_MEM_SIZE + gfm->size);
+ }
+ break;
+ case FID_VAR:
+ frame += FRAME_ALIGN(GTP_FRAME_VAR_SIZE);
+ break;
+ case FID_END:
+ frame = gtp_frame;
+ break;
+ default:
+ return NULL;
+ break;
+ }
+
+ return frame;
+}
+
+#ifdef FRAME_ALLOC_RECORD
+ULONGEST frame_alloc_size;
+ULONGEST frame_alloc_size_hole;
+#endif
+
+static char *
+gtp_frame_alloc(size_t size)
+{
+ char *ret = NULL;
+
+#ifdef FRAME_ALLOC_RECORD
+ frame_alloc_size += size;
+ frame_alloc_size_hole += (FRAME_ALIGN(size) - size);
+#endif
+
+ size = FRAME_ALIGN(size);
+
+ if (size > GTP_FRAME_SIZE)
+ return NULL;
+
+ spin_lock(>p_frame_lock);
+
+ if (gtp_frame_w_start + size > gtp_frame_end) {
+ if (gtp_circular) {
+ gtp_frame_is_circular = 1;
+#ifdef FRAME_ALLOC_RECORD
+ if (gtp_frame_w_start != gtp_frame_end
+ && gtp_frame_end - gtp_frame_w_start < FID_SIZE) {
+ printk(KERN_WARNING "Frame align wrong."
+ "start = %p end = %p\n",
+ gtp_frame_w_start, gtp_frame_end);
+ goto out;
+ }
+#endif
+ if (gtp_frame_w_start != gtp_frame_end)
+ FID(gtp_frame_w_start) = FID_END;
+ gtp_frame_w_start = gtp_frame;
+ gtp_frame_r_start = gtp_frame;
+ } else
+ goto out;
+ }
+
+ if (gtp_frame_is_circular) {
+ while (gtp_frame_w_start <= gtp_frame_r_start
+ && gtp_frame_w_start + size > gtp_frame_r_start) {
+ char *tmp = gtp_frame_next(gtp_frame_r_start);
+ if (tmp == NULL)
+ goto out;
+ gtp_frame_r_start = tmp;
+ }
+ }
+
+ ret = gtp_frame_w_start;
+ gtp_frame_w_start += size;
+
+out:
+ spin_unlock(>p_frame_lock);
+ return ret;
+}
+
+static char * *
+gtp_action_head(struct gtp_entry *tpe)
+{
+ char *tmp;
+ char **nextp;
+ ULONGEST *trace_nump;
+
+ /* Get the head. */
+ tmp = gtp_frame_alloc(GTP_FRAME_HEAD_SIZE);
+ if (!tmp) {
+ tpe->reason = gtp_stop_frame_full;
+ return NULL;
+ }
+
+ FID(tmp) = FID_HEAD;
+ tmp += FID_SIZE;
+
+ nextp = (char **)tmp;
+ *nextp = NULL;
+ tmp += sizeof(char *);
+
+ trace_nump = (ULONGEST *)tmp;
+ *trace_nump = tpe->num;
+
+ return nextp;
+}
+
+struct gtp_trace_s {
+ struct gtp_entry *tpe;
+ struct pt_regs *regs;
+ char **next;
+ int *run;
+ ULONGEST printk_tmp;
+ unsigned int printk_level;
+ unsigned int printk_format;
+ struct gtpsrc *printk_str;
+};
+
+#define GTP_PRINTK_FORMAT_A 0
+#define GTP_PRINTK_FORMAT_D 1
+#define GTP_PRINTK_FORMAT_U 2
+#define GTP_PRINTK_FORMAT_X 3
+#define GTP_PRINTK_FORMAT_S 4
+#define GTP_PRINTK_FORMAT_B 5
+
+static int
+gtp_action_printk(struct gtp_trace_s *gts, ULONGEST addr, size_t size)
+{
+ unsigned int printk_format = gts->printk_format;
+ char *pbuf = per_cpu(gtp_printf, smp_processor_id());
+
+ if (gts->printk_str == NULL) {
+ gts->tpe->reason = gtp_stop_agent_expr_code_error;
+ printk(KERN_WARNING "gtp_action_printk: id:%d "
+ "printk doesn't have var name. Please "
+ "check actions of it.\n",
+ (int)gts->tpe->num);
+ return -1;
+ }
+
+ if (size) {
+ if (size > GTP_PRINTF_MAX - 1)
+ size = GTP_PRINTF_MAX - 1;
+ if (gts->printk_format != GTP_PRINTK_FORMAT_S
+ && gts->printk_format != GTP_PRINTK_FORMAT_B
+ && size > 8)
+ size = 8;
+ if (probe_kernel_read(pbuf, (void *)(CORE_ADDR)addr, size)) {
+ gts->tpe->reason = gtp_stop_efault;
+ printk(KERN_WARNING "gtp_action_printk: id:%d "
+ "read %p %u get error.\n",
+ (int)gts->tpe->num, (void *)(CORE_ADDR)addr,
+ (unsigned int)size);
+ return -1;
+ }
+ } else {
+ size = sizeof(ULONGEST);
+ memcpy(pbuf, &addr, sizeof(ULONGEST));
+ }
+
+ if (printk_format == GTP_PRINTK_FORMAT_A) {
+ if (size == 1 || size == 2 || size == 4 || size == 8)
+ printk_format = GTP_PRINTK_FORMAT_U;
+ else
+ printk_format = GTP_PRINTK_FORMAT_B;
+ }
+
+ switch (printk_format) {
+ case GTP_PRINTK_FORMAT_D:
+ switch (size) {
+ case 1:
+ printk(KERN_NULL "<%d>%s%d\n", gts->printk_level,
+ gts->printk_str->src, pbuf[0]);
+ break;
+ case 2:
+ printk(KERN_NULL "<%d>%s%d\n", gts->printk_level,
+ gts->printk_str->src, (int)(*(short *)pbuf));
+ break;
+ case 4:
+ printk(KERN_NULL "<%d>%s%d\n", gts->printk_level,
+ gts->printk_str->src, *(int *)pbuf);
+ break;
+ case 8:
+ printk(KERN_NULL "<%d>%s%lld\n", gts->printk_level,
+ gts->printk_str->src, *(long long *)pbuf);
+ break;
+ default:
+ printk(KERN_WARNING "gtp_action_printk: id:%d "
+ "size %d cannot printk.\n",
+ (int)gts->tpe->num, (unsigned int)size);
+ gts->tpe->reason = gtp_stop_agent_expr_code_error;
+ return -1;
+ break;
+ }
+ break;
+ case GTP_PRINTK_FORMAT_U:
+ switch (size) {
+ case 1:
+ printk(KERN_NULL "<%d>%s%u\n", gts->printk_level,
+ gts->printk_str->src, pbuf[0]);
+ break;
+ case 2:
+ printk(KERN_NULL "<%d>%s%u\n", gts->printk_level,
+ gts->printk_str->src, (int)(*(short *)pbuf));
+ break;
+ case 4:
+ printk(KERN_NULL "<%d>%s%u\n", gts->printk_level,
+ gts->printk_str->src, *(int *)pbuf);
+ break;
+ case 8:
+ printk(KERN_NULL "<%d>%s%llu\n", gts->printk_level,
+ gts->printk_str->src, *(long long *)pbuf);
+ break;
+ default:
+ printk(KERN_WARNING "gtp_action_printk: id:%d "
+ "size %d cannot printk.\n",
+ (int)gts->tpe->num, (unsigned int)size);
+ gts->tpe->reason = gtp_stop_agent_expr_code_error;
+ return -1;
+ break;
+ }
+ break;
+ case GTP_PRINTK_FORMAT_X:
+ switch (size) {
+ case 1:
+ printk(KERN_NULL "<%d>%s0x%x\n", gts->printk_level,
+ gts->printk_str->src, pbuf[0]);
+ break;
+ case 2:
+ printk(KERN_NULL "<%d>%s0x%x\n", gts->printk_level,
+ gts->printk_str->src, (int)(*(short *)pbuf));
+ break;
+ case 4:
+ printk(KERN_NULL "<%d>%s0x%x\n", gts->printk_level,
+ gts->printk_str->src, *(int *)pbuf);
+ break;
+ case 8:
+ printk(KERN_NULL "<%d>%s0x%llx\n", gts->printk_level,
+ gts->printk_str->src, *(long long *)pbuf);
+ break;
+ default:
+ printk(KERN_WARNING "gtp_action_printk: id:%d "
+ "size %d cannot printk.\n",
+ (int)gts->tpe->num, (unsigned int)size);
+ gts->tpe->reason = gtp_stop_agent_expr_code_error;
+ return -1;
+ break;
+ }
+ break;
+ case GTP_PRINTK_FORMAT_S:
+ pbuf[GTP_PRINTF_MAX - 1] = '\0';
+ printk("<%d>%s%s\n", gts->printk_level, gts->printk_str->src,
+ pbuf);
+ break;
+ case GTP_PRINTK_FORMAT_B: {
+ size_t i;
+
+ printk(KERN_NULL "<%d>%s", gts->printk_level,
+ gts->printk_str->src);
+ for (i = 0; i < size; i++)
+ printk("%02x", (unsigned int)pbuf[i]);
+ printk("\n");
+ }
+ break;
+ default:
+ printk(KERN_WARNING "gtp_action_printk: id:%d "
+ "printk format %u is not support.\n",
+ (int)gts->tpe->num, gts->printk_format);
+ gts->tpe->reason = gtp_stop_agent_expr_code_error;
+ return -1;
+ break;
+ }
+
+ gts->printk_str = gts->printk_str->next;
+
+ return 0;
+}
+
+static int
+gtp_action_memory_read(struct gtp_trace_s *gts, int reg, CORE_ADDR addr,
+ size_t size)
+{
+ char *tmp;
+ struct gtp_frame_mem *fm;
+
+ if (reg >= 0)
+ addr += (CORE_ADDR) gtp_action_reg_read(gts->regs,
+ gts->tpe, reg);
+ if (gts->tpe->reason != gtp_stop_normal)
+ return -1;
+
+ if (gts->next == NULL) {
+ gts->next = gtp_action_head(gts->tpe);
+ if (!gts->next)
+ return -1;
+ }
+
+ tmp = gtp_frame_alloc(GTP_FRAME_MEM_SIZE + size);
+ if (!tmp) {
+ gts->tpe->reason = gtp_stop_frame_full;
+ return -1;
+ }
+ *gts->next = tmp;
+
+ FID(tmp) = FID_MEM;
+ tmp += FID_SIZE;
+
+ gts->next = (char **)tmp;
+ *gts->next = NULL;
+ tmp += sizeof(char *);
+
+ fm = (struct gtp_frame_mem *)tmp;
+ fm->addr = addr;
+ fm->size = size;
+ tmp += sizeof(struct gtp_frame_mem);
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_action_memory_read: id:%d %p %u\n",
+ (int)gts->tpe->num, (void *)addr, (unsigned int)size);
+#endif
+
+ if (probe_kernel_read(tmp, (void *)addr, size)) {
+ gts->tpe->reason = gtp_stop_efault;
+ memset(tmp, 0, size);
+ printk(KERN_WARNING "gtp_action_memory_read: id:%d read %p %u "
+ "get error.\n", (int)gts->tpe->num,
+ (void *)addr, (unsigned int)size);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+gtp_action_r(struct gtp_trace_s *gts, struct action *ae)
+{
+ struct pt_regs *regs;
+ char *tmp;
+
+ if (gts->next == NULL) {
+ gts->next = gtp_action_head(gts->tpe);
+ if (!gts->next)
+ return -1;
+ }
+
+ tmp = gtp_frame_alloc(GTP_FRAME_REG_SIZE);
+ if (!tmp) {
+ gts->tpe->reason = gtp_stop_frame_full;
+ return -1;
+ }
+ *gts->next = tmp;
+
+ FID(tmp) = FID_REG;
+ tmp += FID_SIZE;
+
+ gts->next = (char **)tmp;
+ *gts->next = NULL;
+ tmp += sizeof(char *);
+
+ regs = (struct pt_regs *)tmp;
+
+ memcpy(regs, gts->regs, sizeof(struct pt_regs));
+#ifdef CONFIG_X86_32
+ regs->sp = (unsigned long)®s->sp;
+#endif /* CONFIG_X86_32 */
+#ifdef CONFIG_X86
+ regs->ip -= 1;
+#endif /* CONFIG_X86 */
+
+ return 0;
+}
+
+static struct gtp_var *
+gtp_gtp_var_array_find(unsigned int num)
+{
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gtp_var_array_find: num:%u %u %u\n",
+ gtp_var_head, gtp_var_tail, num);
+#endif
+
+ if (num < gtp_var_head || num > gtp_var_tail)
+ return NULL;
+
+ return gtp_var_array[num - gtp_var_head];
+}
+
+uint64_t
+gtp_get_var(struct gtp_trace_s *gts, struct gtp_var *tve)
+{
+ switch (tve->num) {
+ case GTP_VAR_CURRENT_TASK_ID:
+ return (uint64_t)(CORE_ADDR)get_current();
+ break;
+ case GTP_VAR_CURRENT_THREAD_INFO_ID:
+ return (uint64_t)(CORE_ADDR)current_thread_info();
+ break;
+ case GTP_VAR_CLOCK_ID:
+ return (uint64_t)(CORE_ADDR)local_clock();
+ break;
+ case GTP_VAR_CPU_ID:
+ return (uint64_t)(CORE_ADDR)smp_processor_id();
+ break;
+ case GTP_VAR_PRINTK_TMP_ID:
+ return gts->printk_tmp;
+ break;
+ case GTP_VAR_DUMP_STACK_ID:
+ printk(KERN_NULL "gtp %d:", (int)gts->tpe->num);
+ dump_stack();
+ return 0;
+ break;
+ }
+
+ return tve->val;
+}
+
+static int
+gtp_collect_var(struct gtp_trace_s *gts, struct gtp_var *tve)
+{
+ struct gtp_frame_var *fvar;
+ char *tmp;
+
+ if (gts->next == NULL) {
+ gts->next = gtp_action_head(gts->tpe);
+ if (!gts->next)
+ return -1;
+ }
+
+ tmp = gtp_frame_alloc(GTP_FRAME_VAR_SIZE);
+ if (!tmp) {
+ gts->tpe->reason = gtp_stop_frame_full;
+ return -1;
+ }
+ *gts->next = tmp;
+
+ FID(tmp) = FID_VAR;
+ tmp += FID_SIZE;
+
+ gts->next = (char **)tmp;
+ *gts->next = NULL;
+ tmp += sizeof(char *);
+
+ fvar = (struct gtp_frame_var *) tmp;
+ fvar->num = tve->num;
+ fvar->val = gtp_get_var(gts, tve);
+
+ return 0;
+}
+
+#define gtp_action_x_getv \
+ do { \
+ struct gtp_var *tve; \
+ \
+ tve = gtp_gtp_var_array_find(arg); \
+ if (!tve) \
+ goto code_error_out; \
+ \
+ stack[sp++] = top; \
+ \
+ top = gtp_get_var(gts, tve); \
+ } while (0)
+
+#define gtp_action_x_setv \
+ do { \
+ switch (arg) { \
+ case GTP_VAR_PRINTK_TMP_ID: \
+ gts->printk_tmp = top; \
+ break; \
+ case GTP_VAR_PRINTK_LEVEL_ID: \
+ gts->printk_level = (unsigned int)top; \
+ break; \
+ case GTP_VAR_PRINTK_FORMAT_ID: \
+ gts->printk_format = (unsigned int)top; \
+ break; \
+ default: { \
+ struct gtp_var *tve; \
+ \
+ tve = gtp_gtp_var_array_find(arg); \
+ if (!tve) \
+ goto code_error_out; \
+ /* Not check the other special \
+ trace state variables. \
+ Checked in gtp_check_x. */ \
+ tve->val = (uint64_t)top; \
+ } \
+ break; \
+ } \
+ } while (0)
+
+#define gtp_action_x_tracev \
+ do { \
+ if (gts->tpe->have_printk) \
+ pc += 2; \
+ else { \
+ struct gtp_var *tve; \
+ \
+ tve = gtp_gtp_var_array_find(arg); \
+ if (!tve) \
+ goto code_error_out; \
+ \
+ if (gtp_collect_var(gts, tve)) { \
+ /* gtp_collect_var will set error \
+ status with itself if it got \
+ error. */ \
+ goto out; \
+ } \
+ } \
+ } while (0)
+
+#define gtp_action_x_tracev_printk \
+ do { \
+ struct gtp_var *tve; \
+ \
+ tve = gtp_gtp_var_array_find(arg); \
+ if (!tve) \
+ goto code_error_out; \
+ \
+ if (gtp_action_printk(gts, gtp_get_var(gts, tve), 0)) { \
+ /* gtp_collect_var will set error status with \
+ itself if it got error. */ \
+ goto out; \
+ } \
+ } while (0)
+
+#define gtp_action_x_printf \
+ do { \
+ if (strstr((char *)(ebuf + pc), "%s")) { \
+ int i; \
+ char buf[50]; \
+ \
+ for (i = 0; i < 50; i++) { \
+ if (probe_kernel_read(buf + i, \
+ argv + i, 1)) \
+ goto code_error_out; \
+ if (!buf[i]) \
+ break; \
+ } \
+ snprintf(pbuf, psize, (char *)(ebuf + pc), \
+ buf); \
+ } else { \
+ snprintf(pbuf, psize, (char *)(ebuf + pc), \
+ argv); \
+ } \
+ } while (0)
+
+#define STACK_MAX 32
+static DEFINE_PER_CPU(ULONGEST[STACK_MAX], action_x_stack);
+
+static int
+gtp_action_x(struct gtp_trace_s *gts, struct action *ae)
+{
+ int ret = 0;
+ unsigned int pc = 0, sp = 0;
+ ULONGEST top = 0;
+ int arg;
+ union {
+ union {
+ uint8_t bytes[1];
+ uint8_t val;
+ } u8;
+ union {
+ uint8_t bytes[2];
+ uint16_t val;
+ } u16;
+ union {
+ uint8_t bytes[4];
+ uint32_t val;
+ } u32;
+ union {
+ uint8_t bytes[8];
+ ULONGEST val;
+ } u64;
+ } cnv;
+ uint8_t *ebuf = ae->u.exp.buf;
+ int psize = GTP_PRINTF_MAX;
+ char *pbuf = per_cpu(gtp_printf, smp_processor_id());
+ ULONGEST *stack = per_cpu(action_x_stack, smp_processor_id());
+
+ if (ae->u.exp.need_var_lock)
+ spin_lock(>p_var_lock);
+
+ if (ae->type == 'X') {
+ while (pc < ae->u.exp.size) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_parse_x: cmd %x\n", ebuf[pc]);
+#endif
+
+ switch (ebuf[pc++]) {
+ /* add */
+ case 0x02:
+ top += stack[--sp];
+ break;
+ /* sub */
+ case 0x03:
+ top = stack[--sp] - top;
+ break;
+ /* mul */
+ case 0x04:
+ top *= stack[--sp];
+ break;
+#ifndef CONFIG_MIPS
+ /* div_signed */
+ case 0x05:
+ if (top) {
+ LONGEST l = (LONGEST) stack[--sp];
+ do_div(l, (LONGEST) top);
+ top = l;
+ } else
+ goto code_error_out;
+ break;
+ /* div_unsigned */
+ case 0x06:
+ if (top) {
+ ULONGEST ul = stack[--sp];
+ do_div(ul, top);
+ top = ul;
+ } else
+ goto code_error_out;
+ break;
+ /* rem_signed */
+ case 0x07:
+ if (top) {
+ LONGEST l1 = (LONGEST) stack[--sp];
+ LONGEST l2 = (LONGEST) top;
+ top = do_div(l1, l2);
+ } else
+ goto code_error_out;
+ break;
+ /* rem_unsigned */
+ case 0x08:
+ if (top) {
+ ULONGEST ul1 = stack[--sp];
+ ULONGEST ul2 = top;
+ top = do_div(ul1, ul2);
+ } else
+ goto code_error_out;
+ break;
+#endif
+ /* lsh */
+ case 0x09:
+ top = stack[--sp] << top;
+ break;
+ /* rsh_signed */
+ case 0x0a:
+ top = ((LONGEST) stack[--sp]) >> top;
+ break;
+ /* rsh_unsigned */
+ case 0x0b:
+ top = stack[--sp] >> top;
+ break;
+ /* trace */
+ case 0x0c:
+ --sp;
+ if (!gts->tpe->have_printk) {
+ if (gtp_action_memory_read
+ (gts, -1,
+ (CORE_ADDR) stack[sp],
+ (size_t) top))
+ goto out;
+ }
+ top = stack[--sp];
+ break;
+ /* trace_printk */
+ case 0xfd:
+ if (gtp_action_printk(gts,
+ (ULONGEST)stack[--sp],
+ (size_t) top))
+ goto out;
+ top = stack[--sp];
+ break;
+ /* trace_quick */
+ case 0x0d:
+ if (!gts->tpe->have_printk) {
+ if (gtp_action_memory_read
+ (gts, -1, (CORE_ADDR) top,
+ (size_t) ebuf[pc]))
+ goto out;
+ }
+ pc++;
+ break;
+ /* trace_quick_printk */
+ case 0xfe:
+ if (gtp_action_printk(gts, (ULONGEST) top,
+ (size_t) ebuf[pc++]))
+ goto out;
+ break;
+ /* log_not */
+ case 0x0e:
+ top = !top;
+ break;
+ /* bit_and */
+ case 0x0f:
+ top &= stack[--sp];
+ break;
+ /* bit_or */
+ case 0x10:
+ top |= stack[--sp];
+ break;
+ /* bit_xor */
+ case 0x11:
+ top ^= stack[--sp];
+ break;
+ /* bit_not */
+ case 0x12:
+ top = ~top;
+ break;
+ /* equal */
+ case 0x13:
+ top = (stack[--sp] == top);
+ break;
+ /* less_signed */
+ case 0x14:
+ top = (((LONGEST) stack[--sp])
+ < ((LONGEST) top));
+ break;
+ /* less_unsigned */
+ case 0x15:
+ top = (stack[--sp] < top);
+ break;
+ /* ext */
+ case 0x16:
+ arg = ebuf[pc++];
+ if (arg < (sizeof(LONGEST)*8)) {
+ LONGEST mask = 1 << (arg - 1);
+ top &= ((LONGEST) 1 << arg) - 1;
+ top = (top ^ mask) - mask;
+ }
+ break;
+ /* ref8 */
+ case 0x17:
+ if (probe_kernel_read
+ (cnv.u8.bytes,
+ (void *)(CORE_ADDR)top, 1))
+ goto code_error_out;
+ top = (ULONGEST) cnv.u8.val;
+ break;
+ /* ref16 */
+ case 0x18:
+ if (probe_kernel_read
+ (cnv.u16.bytes,
+ (void *)(CORE_ADDR)top, 2))
+ goto code_error_out;
+ top = (ULONGEST) cnv.u16.val;
+ break;
+ /* ref32 */
+ case 0x19:
+ if (probe_kernel_read
+ (cnv.u32.bytes,
+ (void *)(CORE_ADDR)top, 4))
+ goto code_error_out;
+ top = (ULONGEST) cnv.u32.val;
+ break;
+ /* ref64 */
+ case 0x1a:
+ if (probe_kernel_read
+ (cnv.u64.bytes,
+ (void *)(CORE_ADDR)top, 8))
+ goto code_error_out;
+ top = (ULONGEST) cnv.u64.val;
+ break;
+ /* if_goto */
+ case 0x20:
+ /* The not check sp code don't
+ support if_goto. */
+ goto code_error_out;
+ break;
+ /* goto */
+ case 0x21:
+ pc = (ebuf[pc] << 8) + (ebuf[pc + 1]);
+ break;
+ /* const8 */
+ case 0x22:
+ stack[sp++] = top;
+ top = ebuf[pc++];
+ break;
+ /* const16 */
+ case 0x23:
+ stack[sp++] = top;
+ top = ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ break;
+ /* const32 */
+ case 0x24:
+ stack[sp++] = top;
+ top = ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ break;
+ /* const64 */
+ case 0x25:
+ stack[sp++] = top;
+ top = ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ break;
+ /* reg */
+ case 0x26:
+ stack[sp++] = top;
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ top = gtp_action_reg_read(gts->regs, gts->tpe,
+ arg);
+ if (gts->tpe->reason != gtp_stop_normal)
+ goto error_out;
+ break;
+ /* end */
+ case 0x27:
+ if (gts->run)
+ *(gts->run) = (int)top;
+ goto out;
+ break;
+ /* dup */
+ case 0x28:
+ stack[sp++] = top;
+ break;
+ /* pop */
+ case 0x29:
+ top = stack[--sp];
+ break;
+ /* zero_ext */
+ case 0x2a:
+ arg = ebuf[pc++];
+ if (arg < (sizeof(LONGEST)*8))
+ top &= ((LONGEST) 1 << arg) - 1;
+ break;
+ /* swap */
+ case 0x2b:
+ stack[sp] = top;
+ top = stack[sp - 1];
+ stack[sp - 1] = stack[sp];
+ break;
+ /* getv */
+ case 0x2c:
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ gtp_action_x_getv;
+ break;
+ /* setv */
+ case 0x2d:
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ gtp_action_x_setv;
+ break;
+ /* tracev */
+ case 0x2e:
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ gtp_action_x_tracev;
+ break;
+ /* tracev_printk */
+ case 0xff:
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ gtp_action_x_tracev_printk;
+ break;
+ /* printf */
+ case 0x31: {
+ arg = ebuf[pc++];
+
+ if (arg) {
+ void *argv = (void *)
+ (unsigned long)
+ top;
+
+ /* pop */
+ top = stack[--sp];
+
+ gtp_action_x_printf;
+ } else
+ snprintf(pbuf, psize,
+ (char *)(ebuf + pc));
+ psize -= strlen(pbuf);
+ pbuf += strlen(pbuf);
+
+ pc += strlen((char *)ebuf + pc) + 1;
+ }
+ break;
+ }
+ }
+ } else {
+ /* The x execution code don't support printk so it doesn't have
+ printk ae support. */
+ while (pc < ae->u.exp.size) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_parse_x: cmd %x\n", ebuf[pc]);
+#endif
+
+ switch (ebuf[pc++]) {
+ /* add */
+ case 0x02:
+ if (sp)
+ top += stack[--sp];
+ else
+ goto code_error_out;
+ break;
+ /* sub */
+ case 0x03:
+ if (sp)
+ top = stack[--sp] - top;
+ else
+ goto code_error_out;
+ break;
+ /* mul */
+ case 0x04:
+ if (sp)
+ top *= stack[--sp];
+ else
+ goto code_error_out;
+ break;
+#ifndef CONFIG_MIPS
+ /* div_signed */
+ case 0x05:
+ if (top && sp) {
+ LONGEST l = (LONGEST) stack[--sp];
+ do_div(l, (LONGEST) top);
+ top = l;
+ } else
+ goto code_error_out;
+ break;
+ /* div_unsigned */
+ case 0x06:
+ if (top && sp) {
+ ULONGEST ul = stack[--sp];
+ do_div(ul, top);
+ top = ul;
+ } else
+ goto code_error_out;
+ break;
+ /* rem_signed */
+ case 0x07:
+ if (top && sp) {
+ LONGEST l1 = (LONGEST) stack[--sp];
+ LONGEST l2 = (LONGEST) top;
+ top = do_div(l1, l2);
+ } else
+ goto code_error_out;
+ break;
+ /* rem_unsigned */
+ case 0x08:
+ if (top && sp) {
+ ULONGEST ul1 = stack[--sp];
+ ULONGEST ul2 = top;
+ top = do_div(ul1, ul2);
+ } else
+ goto code_error_out;
+ break;
+#endif
+ /* lsh */
+ case 0x09:
+ if (sp)
+ top = stack[--sp] << top;
+ else
+ goto code_error_out;
+ break;
+ /* rsh_signed */
+ case 0x0a:
+ if (sp)
+ top = ((LONGEST) stack[--sp]) >> top;
+ else
+ goto code_error_out;
+ break;
+ /* rsh_unsigned */
+ case 0x0b:
+ if (sp)
+ top = stack[--sp] >> top;
+ else
+ goto code_error_out;
+ break;
+ /* trace */
+ case 0x0c:
+ if (sp > 1) {
+ if (gtp_action_memory_read
+ (gts, -1, (CORE_ADDR) stack[--sp],
+ (size_t) top)) {
+ /* gtp_action_memory_read will
+ set error status with itself
+ if it got error. */
+ goto out;
+ }
+ top = stack[--sp];
+ } else
+ goto code_error_out;
+ break;
+ /* trace_quick */
+ case 0x0d:
+ if (gtp_action_memory_read
+ (gts, -1, (CORE_ADDR) top,
+ (size_t) ebuf[pc++])) {
+ /* gtp_action_memory_read will set
+ error status with itself if it got
+ error. */
+ goto out;
+ }
+ break;
+ /* log_not */
+ case 0x0e:
+ top = !top;
+ break;
+ /* bit_and */
+ case 0x0f:
+ if (sp)
+ top &= stack[--sp];
+ else
+ goto code_error_out;
+ break;
+ /* bit_or */
+ case 0x10:
+ if (sp)
+ top |= stack[--sp];
+ else
+ goto code_error_out;
+ break;
+ /* bit_xor */
+ case 0x11:
+ if (sp)
+ top ^= stack[--sp];
+ else
+ goto code_error_out;
+ break;
+ /* bit_not */
+ case 0x12:
+ top = ~top;
+ break;
+ /* equal */
+ case 0x13:
+ if (sp)
+ top = (stack[--sp] == top);
+ else
+ goto code_error_out;
+ break;
+ /* less_signed */
+ case 0x14:
+ if (sp)
+ top = (((LONGEST) stack[--sp])
+ < ((LONGEST) top));
+ else
+ goto code_error_out;
+ break;
+ /* less_unsigned */
+ case 0x15:
+ if (sp)
+ top = (stack[--sp] < top);
+ else
+ goto code_error_out;
+ break;
+ /* ext */
+ case 0x16:
+ arg = ebuf[pc++];
+ if (arg < (sizeof(LONGEST)*8)) {
+ LONGEST mask = 1 << (arg - 1);
+ top &= ((LONGEST) 1 << arg) - 1;
+ top = (top ^ mask) - mask;
+ }
+ break;
+ /* ref8 */
+ case 0x17:
+ if (probe_kernel_read
+ (cnv.u8.bytes,
+ (void *)(CORE_ADDR)top, 1))
+ goto code_error_out;
+ top = (ULONGEST) cnv.u8.val;
+ break;
+ /* ref16 */
+ case 0x18:
+ if (probe_kernel_read
+ (cnv.u16.bytes,
+ (void *)(CORE_ADDR)top, 2))
+ goto code_error_out;
+ top = (ULONGEST) cnv.u16.val;
+ break;
+ /* ref32 */
+ case 0x19:
+ if (probe_kernel_read
+ (cnv.u32.bytes,
+ (void *)(CORE_ADDR)top, 4))
+ goto code_error_out;
+ top = (ULONGEST) cnv.u32.val;
+ break;
+ /* ref64 */
+ case 0x1a:
+ if (probe_kernel_read
+ (cnv.u64.bytes,
+ (void *)(CORE_ADDR)top, 8))
+ goto code_error_out;
+ top = (ULONGEST) cnv.u64.val;
+ break;
+ /* if_goto */
+ case 0x20:
+ if (top)
+ pc = (ebuf[pc] << 8)
+ + (ebuf[pc + 1]);
+ else
+ pc += 2;
+ /* pop */
+ if (sp)
+ top = stack[--sp];
+ else
+ goto code_error_out;
+ break;
+ /* goto */
+ case 0x21:
+ pc = (ebuf[pc] << 8) + (ebuf[pc + 1]);
+ break;
+ /* const8 */
+ case 0x22:
+ stack[sp++] = top;
+ top = ebuf[pc++];
+ break;
+ /* const16 */
+ case 0x23:
+ stack[sp++] = top;
+ top = ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ break;
+ /* const32 */
+ case 0x24:
+ stack[sp++] = top;
+ top = ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ break;
+ /* const64 */
+ case 0x25:
+ stack[sp++] = top;
+ top = ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ top = (top << 8) + ebuf[pc++];
+ break;
+ /* reg */
+ case 0x26:
+ stack[sp++] = top;
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ top = gtp_action_reg_read(gts->regs, gts->tpe,
+ arg);
+ if (gts->tpe->reason != gtp_stop_normal)
+ goto error_out;
+ break;
+ /* end */
+ case 0x27:
+ if (gts->run)
+ *(gts->run) = (int)top;
+ goto out;
+ break;
+ /* dup */
+ case 0x28:
+ stack[sp++] = top;
+ break;
+ /* pop */
+ case 0x29:
+ if (sp)
+ top = stack[--sp];
+ else
+ goto code_error_out;
+ break;
+ /* zero_ext */
+ case 0x2a:
+ arg = ebuf[pc++];
+ if (arg < (sizeof(LONGEST)*8))
+ top &= ((LONGEST) 1 << arg) - 1;
+ break;
+ /* swap */
+ case 0x2b:
+ if (sp) {
+ stack[sp] = top;
+ top = stack[sp - 1];
+ stack[sp - 1] = stack[sp];
+ } else
+ goto code_error_out;
+ break;
+ /* getv */
+ case 0x2c:
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ if (GTP_VAR_NOT_GETV(arg))
+ goto code_error_out;
+ gtp_action_x_getv;
+ break;
+ /* setv */
+ case 0x2d:
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ if (GTP_VAR_NOT_SETV(arg))
+ goto code_error_out;
+ gtp_action_x_setv;
+ break;
+ /* tracev */
+ case 0x2e:
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+ if (GTP_VAR_NOT_TRACEV(arg))
+ goto code_error_out;
+ gtp_action_x_tracev;
+ break;
+ /* printf */
+ case 0x31: {
+ arg = ebuf[pc++];
+
+ if (arg) {
+ void *argv = (void *)
+ (unsigned long)
+ top;
+
+ /* pop */
+ if (sp)
+ top = stack[--sp];
+ else
+ goto code_error_out;
+
+ gtp_action_x_printf;
+ } else
+ snprintf(pbuf, psize,
+ (char *)(ebuf + pc));
+ psize -= strlen(pbuf);
+ pbuf += strlen(pbuf);
+
+ pc += strlen((char *)ebuf + pc) + 1;
+ }
+ break;
+ }
+
+ if (sp > STACK_MAX - 5) {
+ printk(KERN_WARNING "gtp_action_x: stack "
+ "overflow.\n");
+ gts->tpe->reason
+ = gtp_stop_agent_expr_stack_overflow;
+ goto error_out;
+ }
+ }
+ }
+code_error_out:
+ gts->tpe->reason = gtp_stop_agent_expr_code_error;
+error_out:
+ ret = -1;
+ printk(KERN_WARNING "gtp_action_x: tracepoint %d "
+ "action X get error in pc %u.\n",
+ (int)gts->tpe->num, pc);
+out:
+ if (psize != GTP_PRINTF_MAX) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ printk("%s", pbuf - (GTP_PRINTF_MAX - psize));
+ local_irq_restore(flags);
+ }
+ if (ae->u.exp.need_var_lock)
+ spin_unlock(>p_var_lock);
+ return ret;
+}
+
+static int
+gtp_kp_pre_handler(struct kprobe *p, struct pt_regs *regs)
+{
+ struct gtp_trace_s gts;
+ struct action *ae;
+
+ gts.tpe = container_of(p, struct gtp_entry, kp);
+ gts.regs = regs;
+ gts.next = NULL;
+ gts.printk_tmp = 0;
+ gts.printk_level = 8;
+ gts.printk_format = 0;
+ gts.printk_str = gts.tpe->printk_str;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_kp_pre_handler: tracepoint %d\n",
+ (int)gts.tpe->num);
+#endif
+
+ if (gts.tpe->kpreg == 0)
+ return 0;
+
+ /* Condition. */
+ if (gts.tpe->cond) {
+ int run;
+
+ gts.run = &run;
+ if (gtp_action_x(>s, gts.tpe->cond))
+ goto tpe_stop;
+ if (!run)
+ return 0;
+ }
+
+ gts.run = NULL;
+
+ /* Pass. */
+ if (!gts.tpe->nopass) {
+ if (atomic_dec_return(>s.tpe->current_pass) < 0)
+ goto tpe_stop;
+ }
+
+ atomic_inc(>p_frame_create);
+
+ /* Handle actions. */
+ for (ae = gts.tpe->action_list; ae; ae = ae->next) {
+ switch (ae->type) {
+ case 'R':
+ if (gtp_action_r(>s, ae))
+ goto tpe_stop;
+ break;
+ case 'X':
+ case 0xff:
+ if (gtp_action_x(>s, ae))
+ goto tpe_stop;
+ break;
+ case 'M':
+ if (gtp_action_memory_read(>s, ae->u.m.regnum,
+ ae->u.m.offset,
+ ae->u.m.size))
+ goto tpe_stop;
+ break;
+ }
+ }
+
+ return 0;
+
+tpe_stop:
+ gts.tpe->kpreg = 0;
+ queue_work(gtp_wq, >s.tpe->work);
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_kp_pre_handler: tracepoint %d stop.\n",
+ (int)gts.tpe->num);
+#endif
+ return 0;
+}
+
+static struct action *
+gtp_action_alloc(char *pkg)
+{
+ struct action *ret;
+
+ ret = kmalloc(sizeof(struct action), GFP_KERNEL);
+ if (!ret)
+ goto out;
+
+ memset(ret, '\0', sizeof(struct action));
+ ret->type = pkg[0];
+ ret->src = pkg;
+
+out:
+ return ret;
+}
+
+static void
+gtp_action_release(struct action *ae)
+{
+ struct action *ae2;
+
+ while (ae) {
+ ae2 = ae;
+ ae = ae->next;
+ /* Release ae2. */
+ switch (ae2->type) {
+ case 'X':
+ kfree(ae2->u.exp.buf);
+ break;
+ }
+ kfree(ae2->src);
+ kfree(ae2);
+ }
+}
+
+static void
+gtp_src_release(struct gtpsrc *src)
+{
+ struct gtpsrc *src2;
+
+ while (src) {
+ src2 = src;
+ src = src->next;
+ kfree(src2->src);
+ kfree(src2);
+ }
+}
+
+static void
+gtp_stop(struct work_struct *work)
+{
+ struct gtp_entry *tpe = container_of(work,
+ struct gtp_entry, work);
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_stop: tracepoint %d\n", (int)tpe->num);
+#endif
+
+ unregister_kprobe(&tpe->kp);
+}
+
+static struct gtp_entry *
+gtp_list_add(ULONGEST num, ULONGEST addr)
+{
+ struct gtp_entry *ret = kmalloc(sizeof(struct gtp_entry),
+ GFP_KERNEL);
+
+ if (!ret)
+ goto out;
+ memset(ret, '\0', sizeof(struct gtp_entry));
+ ret->num = num;
+ ret->addr = addr;
+ ret->kp.addr = (kprobe_opcode_t *) (CORE_ADDR)addr;
+ ret->kp.pre_handler = gtp_kp_pre_handler;
+ INIT_WORK(&ret->work, gtp_stop);
+ ret->have_printk = 0;
+
+ /* Add to gtp_list. */
+ ret->next = gtp_list;
+ gtp_list = ret;
+
+out:
+ return ret;
+}
+
+static struct gtp_entry *
+gtp_list_find(ULONGEST num)
+{
+ struct gtp_entry *tpe;
+
+ for (tpe = gtp_list; tpe; tpe = tpe->next) {
+ if (tpe->num == num)
+ return tpe;
+ }
+
+ return NULL;
+}
+
+static void
+gtp_list_release(void)
+{
+ struct gtp_entry *tpe;
+
+ while (gtp_list) {
+ tpe = gtp_list;
+ gtp_list = gtp_list->next;
+ gtp_action_release(tpe->cond);
+ gtp_action_release(tpe->action_list);
+ gtp_src_release(tpe->src);
+ kfree(tpe);
+ }
+
+ current_gtp = NULL;
+ current_gtp_action = NULL;
+ current_gtp_src = NULL;
+}
+
+static void
+gtp_frame_reset(void)
+{
+ gtp_frame_r_start = gtp_frame;
+ gtp_frame_w_start = gtp_frame;
+ gtp_frame_end = gtp_frame + GTP_FRAME_SIZE;
+ gtp_frame_is_circular = 0;
+ gtp_frame_current = NULL;
+ gtp_frame_current_num = 0;
+ atomic_set(>p_frame_create, 0);
+ if (gtp_frame_file) {
+ vfree(gtp_frame_file);
+ gtp_frame_file = NULL;
+ gtp_frame_file_size = 0;
+ }
+}
+
+static int
+hex2int(char hex, int *i)
+{
+ if ((hex >= '0') && (hex <= '9')) {
+ *i = hex - '0';
+ return 1;
+ }
+ if ((hex >= 'a') && (hex <= 'f')) {
+ *i = hex - 'a' + 10;
+ return 1;
+ }
+ if ((hex >= 'A') && (hex <= 'F')) {
+ *i = hex - 'A' + 10;
+ return 1;
+ }
+
+ return 0;
+}
+
+static char *
+hex2ulongest(char *pkg, ULONGEST *u64)
+{
+ int i;
+
+ *u64 = 0;
+ while (hex2int(pkg[0], &i)) {
+ pkg++;
+ *u64 = (*u64) << 4;
+ *u64 |= i & 0xf;
+ }
+
+ return pkg;
+}
+
+static char *
+string2hex(char *pkg, char *out)
+{
+ char *ret = out;
+
+ while (pkg[0]) {
+ sprintf(out, "%x", pkg[0]);
+ pkg++;
+ out += 2;
+ }
+
+ return ret;
+}
+
+static char *
+hex2string(char *pkg, char *out)
+{
+ char *ret = out;
+ int i, j;
+
+ while (hex2int(pkg[0], &i) && hex2int(pkg[1], &j)) {
+ out[0] = i * 16 + j;
+ pkg += 2;
+ out += 1;
+ }
+ out[0] = '\0';
+
+ return ret;
+}
+
+static char *
+gtp_strdup(char *begin, char *end)
+{
+ int len;
+ char *ret;
+
+ if (end)
+ len = end - begin;
+ else
+ len = strlen(begin);
+
+ ret = kmalloc(len + 1, GFP_KERNEL);
+ if (ret == NULL)
+ return NULL;
+
+ strncpy(ret, begin, len);
+ ret[len] = '\0';
+
+ return ret;
+}
+
+static void
+gtpro_list_clear(void)
+{
+ struct gtpro_entry *e;
+
+ while (gtpro_list) {
+ e = gtpro_list;
+ gtpro_list = gtpro_list->next;
+ kfree(e);
+ }
+}
+
+static struct gtpro_entry *
+gtpro_list_add(CORE_ADDR start, CORE_ADDR end)
+{
+ struct gtpro_entry *e;
+
+ e = kmalloc(sizeof(struct gtpro_entry), GFP_KERNEL);
+ if (e == NULL)
+ goto out;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtpro_list_add: %p %p\n", (void *)start, (void *)end);
+#endif
+
+ e->start = start;
+ e->end = end;
+
+ e->next = gtpro_list;
+ gtpro_list = e;
+
+out:
+ return e;
+}
+
+static struct gtp_var *
+gtp_var_add(unsigned int num, uint64_t val, char *src)
+{
+ struct gtp_var *var = kmalloc(sizeof(struct gtp_var), GFP_KERNEL);
+ if (!var)
+ goto out;
+
+ var->num = num;
+ var->val = val;
+
+ var->src = gtp_strdup(src, NULL);
+ if (var->src == NULL) {
+ kfree(var);
+ var = NULL;
+ goto out;
+ }
+
+ var->next = gtp_var_list;
+ gtp_var_list = var;
+ gtp_var_head = min(var->num, gtp_var_head);
+ gtp_var_tail = max(var->num, gtp_var_tail);
+
+out:
+ return var;
+}
+
+static struct gtp_var *
+gtp_var_find(unsigned int num)
+{
+ struct gtp_var *ret = NULL;
+
+ if (num >= gtp_var_head && num <= gtp_var_tail) {
+ for (ret = gtp_var_list; ret; ret = ret->next) {
+ if (ret->num == num)
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static void
+gtp_var_release(void)
+{
+ struct gtp_var *tve;
+
+ gtp_var_head = GTP_VAR_SPECIAL_MIN;
+ gtp_var_tail = GTP_VAR_SPECIAL_MAX;
+ current_gtp_var = NULL;
+
+ while (gtp_var_list != GTP_VAR_LIST_FIRST) {
+ tve = gtp_var_list;
+ gtp_var_list = gtp_var_list->next;
+ kfree(tve->src);
+ kfree(tve);
+ }
+}
+
+static int
+gtp_gdbrsp_qtstop(void)
+{
+ struct gtp_entry *tpe;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtstop\n");
+#endif
+
+#ifdef FRAME_ALLOC_RECORD
+ printk(KERN_WARNING "frame_alloc_size = %llu, "
+ "frame_alloc_size_hole = %llu\n",
+ frame_alloc_size, frame_alloc_size_hole);
+ frame_alloc_size = 0;
+ frame_alloc_size_hole = 0;
+#endif
+
+ if (!gtp_start)
+ return -EBUSY;
+
+ flush_workqueue(gtp_wq);
+
+ for (tpe = gtp_list; tpe; tpe = tpe->next) {
+ if (tpe->kpreg) {
+ unregister_kprobe(&tpe->kp);
+ tpe->kpreg = 0;
+ }
+ }
+
+ kfree(gtp_var_array);
+ gtp_var_array = NULL;
+
+ gtp_start = 0;
+
+ return 0;
+}
+
+static int
+gtp_gdbrsp_qtinit(void)
+{
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtinit\n");
+#endif
+
+ if (gtp_start)
+ gtp_gdbrsp_qtstop();
+
+ gtp_list_release();
+
+ if (gtp_frame)
+ gtp_frame_reset();
+
+ gtpro_list_clear();
+
+ gtp_var_release();
+
+ return 0;
+}
+
+static int
+gtp_gdbrsp_qtstart(void)
+{
+ struct gtp_entry *tpe;
+ struct gtp_var *tve;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtstart\n");
+#endif
+
+ if (gtp_start)
+ return -EBUSY;
+
+ /* Check the tracepoint that have printk. */
+ for (tpe = gtp_list; tpe; tpe = tpe->next) {
+ if (tpe->have_printk) {
+ struct action *ae, *prev_ae = NULL;
+ struct gtpsrc *src, *srctail = NULL;
+
+restart:
+ for (ae = tpe->action_list; ae;
+ prev_ae = ae, ae = ae->next) {
+ switch (ae->type) {
+ case 'R':
+ /* Remove it. */
+ if (prev_ae)
+ prev_ae->next = ae->next;
+ else
+ tpe->action_list = ae->next;
+ kfree(ae->src);
+ kfree(ae);
+ if (prev_ae)
+ ae = prev_ae;
+ else
+ goto restart;
+ break;
+ case 'M':
+ printk(KERN_WARNING "qtstart: action "
+ "of tp %d is not right. "
+ "Please put global variable to "
+ "trace state variable "
+ "$printk_tmp before print it.\n",
+ (int)tpe->num);
+ return -EINVAL;
+ break;
+ }
+ }
+
+ for (src = tpe->src; src; src = src->next) {
+ int i;
+ char str[strlen(src->src) >> 1];
+ char *var = NULL;
+ ULONGEST num;
+ char tmp[20];
+ struct gtpsrc *ksrc;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtstart: action "
+ "%s\n", src->src);
+#endif
+ /* Get the action in str. */
+ if (strncmp("cmd:0:", src->src,
+ strlen("cmd:0:")))
+ continue;
+ var = hex2ulongest(src->src + 6, &num);
+ if (var[0] == '\0')
+ return -EINVAL;
+ var++;
+ hex2string(var, str);
+ if (strlen(str) != num)
+ return -EINVAL;
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtstart: action "
+ "command %s\n", str);
+#endif
+
+ if (strncmp("collect ", str,
+ strlen("collect ")))
+ continue;
+ for (i = strlen("collect "); ; i++) {
+ if (str[i] != ' ') {
+ var = str + i;
+ break;
+ }
+ if (str[i] == '\0')
+ break;
+ }
+ if (!var) {
+ printk(KERN_WARNING "qtstart: cannot "
+ "get the var name "
+ "from tp %d "
+ "command %s.\n",
+ (int)tpe->num, str);
+ return -EINVAL;
+ }
+ if (strcmp(var, "$args") == 0
+ || strcmp(var, "$local") == 0) {
+ printk(KERN_WARNING "qtstart: cannot "
+ "print $args and "
+ "$local.\n");
+ return -EINVAL;
+ }
+ if (strcmp(var, "$reg") == 0)
+ continue;
+
+ ksrc = kmalloc(sizeof(struct gtpsrc),
+ GFP_KERNEL);
+ if (ksrc == NULL)
+ return -ENOMEM;
+ ksrc->next = NULL;
+
+ snprintf(tmp, 20, "gtp %d:", (int)tpe->num);
+ ksrc->src = kmalloc(strlen(tmp)
+ + strlen(var) + 2,
+ GFP_KERNEL);
+ if (ksrc->src == NULL) {
+ kfree(ksrc);
+ return -ENOMEM;
+ }
+ sprintf(ksrc->src, "%s%s=", tmp, var);
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtstart: new "
+ "printk var %s\n", ksrc->src);
+#endif
+
+ if (tpe->printk_str)
+ srctail->next = ksrc;
+ else
+ tpe->printk_str = ksrc;
+ srctail = ksrc;
+ }
+ }
+ }
+
+ if (!gtp_frame) {
+ gtp_frame = vmalloc(GTP_FRAME_SIZE);
+ if (!gtp_frame)
+ return -ENOMEM;
+
+ gtp_frame_reset();
+ }
+
+ gtp_start = 1;
+
+ gtp_var_array = kmalloc(sizeof(struct gtp_var *)
+ *(gtp_var_tail - gtp_var_head + 1),
+ GFP_KERNEL);
+ if (!gtp_var_array) {
+ gtp_gdbrsp_qtstop();
+ return -ENOMEM;
+ }
+ memset(gtp_var_array, '\0', sizeof(struct gtp_var *)
+ *(gtp_var_tail - gtp_var_head + 1));
+ for (tve = gtp_var_list; tve; tve = tve->next)
+ gtp_var_array[tve->num - gtp_var_head] = tve;
+
+ for (tpe = gtp_list; tpe; tpe = tpe->next) {
+ if (!tpe->disable) {
+ int ret;
+
+ if (!tpe->nopass)
+ atomic_set(&tpe->current_pass, tpe->pass);
+ ret = register_kprobe(&tpe->kp);
+ if (ret < 0) {
+ gtp_gdbrsp_qtstop();
+ return ret;
+ }
+ tpe->kpreg = 1;
+ }
+ tpe->reason = gtp_stop_normal;
+ }
+
+ return 0;
+}
+
+struct gtp_x_goto {
+ struct gtp_x_goto *next;
+ unsigned int addr;
+ int non_goto_done;
+};
+
+static struct gtp_x_goto *
+gtp_x_goto_find(struct gtp_x_goto *list, unsigned int pc)
+{
+ struct gtp_x_goto *ret = NULL;
+
+ for (ret = list; ret; ret = ret->next) {
+ if (ret->addr == pc)
+ break;
+ }
+
+ return ret;
+}
+
+static struct gtp_x_goto *
+gtp_x_goto_add(struct gtp_x_goto **list, unsigned int pc, int non_goto_done)
+{
+ struct gtp_x_goto *ret;
+
+ ret = kmalloc(sizeof(struct gtp_x_goto), GFP_KERNEL);
+ if (!ret)
+ goto out;
+
+ ret->addr = pc;
+ ret->non_goto_done = non_goto_done;
+
+ if (*list) {
+ ret->next = *list;
+ *list = ret;
+ } else {
+ ret->next = NULL;
+ *list = ret;
+ }
+
+out:
+ return ret;
+}
+
+struct gtp_x_var {
+ struct gtp_x_var *next;
+ unsigned int num;
+ unsigned int flags;
+};
+
+static int
+gtp_x_var_add(struct gtp_x_var **list, unsigned int num, unsigned int flag)
+{
+ struct gtp_x_var *curv;
+
+ for (curv = *list; curv; curv = curv->next) {
+ if (curv->num == num)
+ break;
+ }
+
+ if (!curv) {
+ curv = kmalloc(sizeof(struct gtp_x_var), GFP_KERNEL);
+ if (!curv)
+ return -ENOMEM;
+ curv->num = num;
+ curv->flags = 0;
+ if (*list) {
+ curv->next = *list;
+ *list = curv;
+ } else {
+ curv->next = NULL;
+ *list = curv;
+ }
+ }
+
+ curv->flags |= flag;
+
+ return 0;
+}
+
+static int
+gtp_check_x(struct gtp_entry *tpe, struct action *ae)
+{
+ int ret = -EINVAL;
+ unsigned int pc = 0, sp = 0;
+ struct gtp_x_goto *glist = NULL, *gtmp;
+ struct gtp_x_var *vlist = NULL, *vtmp;
+ uint8_t *ebuf = ae->u.exp.buf;
+ int last_trace_pc = -1;
+ unsigned int stack_size = 0;
+
+reswitch:
+ while (pc < ae->u.exp.size) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_check_x: cmd %x\n", ebuf[pc]);
+#endif
+ switch (ebuf[pc++]) {
+ /* add */
+ case 0x02:
+ /* sub */
+ case 0x03:
+ /* mul */
+ case 0x04:
+ /* lsh */
+ case 0x09:
+ /* rsh_signed */
+ case 0x0a:
+ /* rsh_unsigned */
+ case 0x0b:
+ /* bit_and */
+ case 0x0f:
+ /* bit_or */
+ case 0x10:
+ /* bit_xor */
+ case 0x11:
+ /* equal */
+ case 0x13:
+ /* less_signed */
+ case 0x14:
+ /* less_unsigned */
+ case 0x15:
+ /* pop */
+ case 0x29:
+ /* swap */
+ case 0x2b:
+ if (ae->type == 'X') {
+ if (sp < 1) {
+ printk(KERN_WARNING "gtp_check_x: "
+ "stack overflow "
+ "in %d.\n",
+ pc - 1);
+ goto release_out;
+ } else
+ sp--;
+ }
+ break;
+
+ /* trace */
+ case 0x0c:
+ if (tpe->have_printk)
+ last_trace_pc = pc - 1;
+
+ if (ae->type == 'X') {
+ if (sp < 2) {
+ printk(KERN_WARNING "gtp_check_x: "
+ "stack overflow "
+ "in %d.\n",
+ pc - 1);
+ goto release_out;
+ } else
+ sp -= 2;
+ }
+ break;
+
+ /* log_not */
+ case 0x0e:
+ /* bit_not */
+ case 0x12:
+ /* ref8 */
+ case 0x17:
+ /* ref16 */
+ case 0x18:
+ /* ref32 */
+ case 0x19:
+ /* ref64 */
+ case 0x1a:
+ break;
+
+ /* dup */
+ case 0x28:
+ if (ae->type == 'X') {
+ sp++;
+ if (stack_size < sp)
+ stack_size = sp;
+ }
+ break;
+
+ /* const8 */
+ case 0x22:
+ if (ae->type == 'X') {
+ sp++;
+ if (stack_size < sp)
+ stack_size = sp;
+ }
+ /* ext */
+ case 0x16:
+ /* zero_ext */
+ case 0x2a:
+ if (pc >= ae->u.exp.size)
+ goto release_out;
+ pc++;
+ break;
+
+ /* trace_quick */
+ case 0x0d:
+ if (tpe->have_printk)
+ last_trace_pc = pc - 1;
+
+ if (pc >= ae->u.exp.size)
+ goto release_out;
+ pc++;
+ break;
+
+ /* const16 */
+ case 0x23:
+ /* reg */
+ case 0x26:
+ if (pc + 1 >= ae->u.exp.size)
+ goto release_out;
+ pc += 2;
+ if (ae->type == 'X') {
+ sp++;
+ if (stack_size < sp)
+ stack_size = sp;
+ }
+ break;
+
+ /* const32 */
+ case 0x24:
+ if (pc + 3 >= ae->u.exp.size)
+ goto release_out;
+ pc += 4;
+ if (ae->type == 'X') {
+ sp++;
+ if (stack_size < sp)
+ stack_size = sp;
+ }
+ break;
+
+ /* const64 */
+ case 0x25:
+ if (pc + 7 >= ae->u.exp.size)
+ goto release_out;
+ pc += 8;
+ if (ae->type == 'X') {
+ sp++;
+ if (stack_size < sp)
+ stack_size = sp;
+ }
+ break;
+
+ /* if_goto */
+ case 0x20:
+ if (tpe->have_printk)
+ goto release_out;
+
+ if (pc + 1 >= ae->u.exp.size)
+ goto release_out;
+ gtmp = gtp_x_goto_find(glist, pc);
+ if (gtmp) {
+ if (gtmp->non_goto_done)
+ goto out;
+ else {
+ gtmp->non_goto_done = 1;
+ pc += 2;
+ }
+ } else {
+ if (!gtp_x_goto_add(&glist, pc, 0)) {
+ ret = -ENOMEM;
+ goto release_out;
+ }
+ pc = (ebuf[pc] << 8)
+ + (ebuf[pc + 1]);
+ }
+ /* Mark this action X need sp check when it exec. */
+ ae->type = 0xff;
+ break;
+
+ /* goto */
+ case 0x21:
+ if (pc + 1 >= ae->u.exp.size)
+ goto release_out;
+ gtmp = gtp_x_goto_find(glist, pc);
+ if (gtmp)
+ goto out;
+ else {
+ if (!gtp_x_goto_add(&glist, pc, 1)) {
+ ret = -ENOMEM;
+ goto release_out;
+ }
+ pc = (ebuf[pc] << 8) + (ebuf[pc + 1]);
+ }
+ break;
+
+ /* end */
+ case 0x27:
+ goto out;
+ break;
+
+ /* getv */
+ case 0x2c: {
+ int arg;
+
+ if (pc + 1 >= ae->u.exp.size)
+ goto release_out;
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+
+ if (GTP_VAR_NOT_GETV(arg)) {
+ printk(KERN_WARNING
+ "gtp_check_x: The tv %d cannot "
+ "get.\n", arg);
+ goto release_out;
+ }
+
+ if (!GTP_VAR_IS_SPECIAL(arg)) {
+ if (gtp_x_var_add(&vlist, arg, 1)) {
+ ret = -ENOMEM;
+ goto release_out;
+ }
+ }
+ }
+ if (ae->type == 'X') {
+ sp++;
+ if (stack_size < sp)
+ stack_size = sp;
+ }
+ break;
+
+ /* setv */
+ case 0x2d: {
+ int arg;
+
+ if (pc + 1 >= ae->u.exp.size)
+ goto release_out;
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+
+ if (GTP_VAR_NOT_SETV(arg)) {
+ printk(KERN_WARNING
+ "gtp_check_x: The tv %d cannot "
+ "set.\n", arg);
+ goto release_out;
+ }
+
+ if (arg == GTP_VAR_PRINTK_LEVEL_ID)
+ tpe->have_printk = 1;
+
+ if (!GTP_VAR_IS_SPECIAL(arg)) {
+ if (gtp_x_var_add(&vlist, arg, 2)) {
+ ret = -ENOMEM;
+ goto release_out;
+ }
+ }
+ }
+ break;
+
+ /* tracev */
+ case 0x2e: {
+ int arg;
+
+ if (tpe->have_printk)
+ last_trace_pc = pc - 1;
+
+ if (pc + 1 >= ae->u.exp.size)
+ goto release_out;
+ arg = ebuf[pc++];
+ arg = (arg << 8) + ebuf[pc++];
+
+ if (GTP_VAR_NOT_TRACEV(arg)) {
+ printk(KERN_WARNING
+ "gtp_check_x: The tv %d cannot "
+ "trace.\n", arg);
+ goto release_out;
+ }
+
+ if (!GTP_VAR_IS_SPECIAL(arg)) {
+ if (gtp_x_var_add(&vlist, arg, 4)) {
+ ret = -ENOMEM;
+ goto release_out;
+ }
+ }
+ }
+ break;
+
+ /* printf */
+ case 0x31: {
+ int arg = ebuf[pc++];
+ if (arg && ae->type == 'X') {
+ if (sp < 1) {
+ printk(KERN_WARNING
+ "gtp_check_x: stack "
+ "overflow in %d.\n",
+ pc - 2);
+ goto release_out;
+ } else
+ sp--;
+ }
+ pc += strlen((char *)ebuf + pc) + 1;
+ }
+ break;
+
+ /* div_signed */
+ case 0x05:
+ /* div_unsigned */
+ case 0x06:
+ /* rem_signed */
+ case 0x07:
+ /* rem_unsigned */
+ case 0x08:
+#ifdef CONFIG_MIPS
+ /* XXX, mips don't have 64 bit div. */
+ goto release_out;
+#endif
+ if (ae->type == 'X') {
+ if (sp < 1) {
+ printk(KERN_WARNING "gtp_check_x: "
+ "stack overflow "
+ "in %d.\n",
+ pc - 1);
+ goto release_out;
+ } else
+ sp--;
+ }
+ break;
+
+ /* float */
+ case 0x01:
+ /* ref_float */
+ case 0x1b:
+ /* ref_double */
+ case 0x1c:
+ /* ref_long_double */
+ case 0x1d:
+ /* l_to_d */
+ case 0x1e:
+ /* d_to_l */
+ case 0x1f:
+ /* trace16 */
+ case 0x30:
+ default:
+ goto release_out;
+ break;
+ }
+ }
+ goto release_out;
+
+out:
+ for (gtmp = glist; gtmp; gtmp = gtmp->next) {
+ if (!gtmp->non_goto_done)
+ break;
+ }
+ if (gtmp) {
+ pc = gtmp->addr + 2;
+ gtmp->non_goto_done = 1;
+ goto reswitch;
+ }
+ if (stack_size >= STACK_MAX) {
+ printk(KERN_WARNING "gtp_check_x: stack overflow.");
+ goto release_out;
+ }
+ ret = 0;
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_check_x: Code is OK. sp_checked is %d. "
+ "stack_size is %d.\n",
+ (ae->type == 'X'), stack_size);
+#endif
+
+release_out:
+ while (glist) {
+ gtmp = glist;
+ glist = glist->next;
+ kfree(gtmp);
+ }
+ while (vlist) {
+ vtmp = vlist;
+ vlist = vlist->next;
+ if ((vtmp->flags & 2)
+ && ((vtmp->flags & 1) || (vtmp->flags & 4)))
+ ae->u.exp.need_var_lock = 1;
+ kfree(vtmp);
+ }
+
+ if (tpe->have_printk && last_trace_pc > -1) {
+ /* Set the last trace code to printk code. */
+ switch (ebuf[last_trace_pc]) {
+ /* trace */
+ case 0x0c:
+ ebuf[last_trace_pc] = 0xfd;
+ break;
+ /* trace_quick */
+ case 0x0d:
+ ebuf[last_trace_pc] = 0xfe;
+ break;
+ /* tracev */
+ case 0x2e:
+ ebuf[last_trace_pc] = 0xff;
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int
+gtp_parse_x(struct gtp_entry *tpe, struct action *ae, char **pkgp)
+{
+ ULONGEST size;
+ int ret = 0, i, h, l;
+ char *pkg = *pkgp;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_parse_x: %s\n", pkg);
+#endif
+
+ if (pkg[0] == '\0') {
+ ret = -EINVAL;
+ goto out;
+ }
+ pkg = hex2ulongest(pkg, &size);
+ if (pkg[0] != ',') {
+ ret = -EINVAL;
+ goto out;
+ }
+ ae->u.exp.size = (unsigned int)size;
+ pkg++;
+
+ ae->u.exp.buf = kmalloc(ae->u.exp.size, GFP_KERNEL);
+ if (!ae->u.exp.buf)
+ return -ENOMEM;
+
+ for (i = 0; i < ae->u.exp.size
+ && hex2int(pkg[0], &h) && hex2int(pkg[1], &l);
+ i++) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_parse_x: %s %d %d\n", pkg, h, l);
+#endif
+ ae->u.exp.buf[i] = (h << 4) | l;
+ pkg += 2;
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_parse_x: %x\n", ae->u.exp.buf[i]);
+#endif
+ }
+ if (i != ae->u.exp.size) {
+ kfree(ae->u.exp.buf);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ae->u.exp.need_var_lock = 0;
+
+ ret = gtp_check_x(tpe, ae);
+ if (ret < 0)
+ kfree(ae->u.exp.buf);
+
+out:
+ *pkgp = pkg;
+ return ret;
+}
+
+static int
+gtp_gdbrsp_qtdp(char *pkg)
+{
+ int addnew = 1;
+ ULONGEST num, addr;
+ struct gtp_entry *tpe;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtdp: %s\n", pkg);
+#endif
+
+ if (gtp_start)
+ return -EBUSY;
+
+ if (pkg[0] == '-') {
+ pkg++;
+ addnew = 0;
+ }
+
+ /* Get num and addr. */
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg = hex2ulongest(pkg, &num);
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg++;
+ pkg = hex2ulongest(pkg, &addr);
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg++;
+
+ tpe = gtp_list_find(num);
+ if (addnew) {
+ if (tpe)
+ return -EINVAL;
+
+ tpe = gtp_list_add(num, addr);
+ if (tpe == NULL)
+ return -ENOMEM;
+
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ if (pkg[0] == 'D')
+ tpe->disable = 1;
+ pkg++;
+
+ /* Get step and pass. */
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg++;
+ pkg = hex2ulongest(pkg, &tpe->step);
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg++;
+ pkg = hex2ulongest(pkg, &tpe->pass);
+ if (tpe->pass == 0)
+ tpe->nopass = 1;
+ }
+
+ if (tpe) {
+ /* Add action to tpe. */
+ int step_action = 0;
+
+ if (pkg[0] == 'S') {
+ pkg++;
+ step_action = 1;
+ /* XXX: Still not support step. */
+ return 1;
+ }
+ while (pkg[0]) {
+ struct action *ae = NULL, *atail = NULL;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtdp: %s\n", pkg);
+#endif
+ switch (pkg[0]) {
+ case ':':
+ pkg++;
+ break;
+ case 'M': {
+ int is_neg = 0;
+ ULONGEST ulongtmp;
+
+ ae = gtp_action_alloc(pkg);
+ if (!ae)
+ return -ENOMEM;
+ pkg++;
+ if (pkg[0] == '-') {
+ is_neg = 1;
+ pkg++;
+ }
+ pkg = hex2ulongest(pkg, &ulongtmp);
+ ae->u.m.regnum = (int)ulongtmp;
+ if (is_neg)
+ ae->u.m.regnum
+ = -ae->u.m.regnum;
+ if (pkg[0] == '\0') {
+ kfree(ae);
+ return -EINVAL;
+ }
+ pkg++;
+ pkg = hex2ulongest(pkg, &ulongtmp);
+ ae->u.m.offset = (CORE_ADDR)ulongtmp;
+ if (pkg[0] == '\0') {
+ kfree(ae);
+ return -EINVAL;
+ }
+ pkg++;
+ pkg = hex2ulongest(pkg, &ulongtmp);
+ ae->u.m.size = (size_t)ulongtmp;
+ }
+ break;
+ case 'R':
+ /* XXX: reg_mask is ignore. */
+ ae = gtp_action_alloc(pkg);
+ if (!ae)
+ return -ENOMEM;
+ pkg++;
+ pkg = hex2ulongest(pkg,
+ &ae->u.reg_mask);
+ break;
+ case 'X': {
+ int ret;
+
+ ae = gtp_action_alloc(pkg);
+ if (!ae)
+ return -ENOMEM;
+ pkg++;
+ ret = gtp_parse_x(tpe, ae, &pkg);
+ if (ret < 0) {
+ kfree(ae);
+ return ret;
+ }
+#ifdef GTP_DEBUG
+ if (ae && ae->u.exp.need_var_lock)
+ printk(GTP_DEBUG
+ "gtp_gdbrsp_qtdp: "
+ "ae need var lock.\n");
+#endif
+ }
+ break;
+ case '-':
+ pkg++;
+ break;
+ default:
+ /* XXX: Not support. */
+ return 1;
+ }
+
+ if (ae) {
+ /* Save the src. */
+ ae->src = gtp_strdup(ae->src, pkg);
+ if (ae->src == NULL) {
+ kfree(ae);
+ return -ENOMEM;
+ }
+ /* Add ae to tpe. */
+ if (ae->type == 'X' && addnew && !tpe->cond) {
+ tpe->cond = ae;
+ tpe->cond->next = NULL;
+ } else if (!tpe->action_list) {
+ tpe->action_list = ae;
+ atail = ae;
+ } else {
+ if (atail == NULL)
+ for (atail = tpe->action_list;
+ atail->next;
+ atail = atail->next)
+ ;
+ atail->next = ae;
+ atail = ae;
+ }
+ }
+ }
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+
+static int
+gtp_gdbrsp_qtdpsrc(char *pkg)
+{
+ ULONGEST num, addr;
+ struct gtpsrc *src, *srctail;
+ struct gtp_entry *tpe;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtdpsrc: %s\n", pkg);
+#endif
+
+ if (gtp_start)
+ return -EBUSY;
+
+ /* Get num and addr. */
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg = hex2ulongest(pkg, &num);
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg++;
+ pkg = hex2ulongest(pkg, &addr);
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg++;
+ tpe = gtp_list_find(num);
+ if (tpe == NULL)
+ return -EINVAL;
+
+ src = kmalloc(sizeof(struct gtpsrc), GFP_KERNEL);
+ if (src == NULL)
+ return -ENOMEM;
+ src->next = NULL;
+ src->src = gtp_strdup(pkg, NULL);
+ if (src->src == NULL) {
+ kfree(src);
+ return -ENOMEM;
+ }
+
+ if (tpe->src) {
+ for (srctail = tpe->src; srctail->next;
+ srctail = srctail->next)
+ ;
+ srctail->next = src;
+ } else
+ tpe->src = src;
+
+ return 0;
+}
+
+static int
+gtp_gdbrsp_qtdisconnected(char *pkg)
+{
+ ULONGEST setting;
+
+ if (pkg[0] == '\0')
+ return -EINVAL;
+
+ hex2ulongest(pkg, &setting);
+ gtp_disconnected_tracing = (int)setting;
+
+ return 0;
+}
+
+static int
+gtp_gdbrsp_qtbuffer(char *pkg)
+{
+ if (strncmp("circular:", pkg, 9) == 0) {
+ ULONGEST setting;
+
+ pkg += 9;
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ hex2ulongest(pkg, &setting);
+ gtp_circular = (int)setting;
+
+ return 0;
+ }
+
+ return 1;
+}
+
+static int
+gtp_frame_head_find_addr(char *cur, int inside, unsigned long lo,
+ unsigned long hi)
+{
+ char *tmp;
+ int tfnum = gtp_frame_current_num;
+
+ if (cur)
+ tmp = cur;
+ else
+ tmp = gtp_frame_r_start;
+
+ do {
+ if (FID(tmp) == FID_HEAD) {
+ if (tfnum != gtp_frame_current_num) {
+ char *next;
+ struct pt_regs *regs = NULL;
+
+ for (next = *(char **)(tmp + FID_SIZE); next;
+ next = *(char **)(next + FID_SIZE)) {
+ if (FID(next) == FID_REG) {
+ regs = (struct pt_regs *)
+ (next + FID_SIZE
+ + sizeof(char *));
+ break;
+ }
+ }
+ if (regs
+ && ((inside
+ && GTP_REGS_PC(regs) >= lo
+ && GTP_REGS_PC(regs) <= hi)
+ || (!inside
+ && (GTP_REGS_PC(regs) < lo
+ || GTP_REGS_PC(regs) > hi)))) {
+ gtp_frame_current_num = tfnum;
+ gtp_frame_current = tmp;
+ return 0;
+ }
+ }
+ tfnum++;
+ }
+
+ tmp = gtp_frame_next(tmp);
+ if (!tmp)
+ break;
+
+ if (tmp == gtp_frame_end)
+ tmp = gtp_frame;
+ } while (tmp != gtp_frame_w_start);
+
+ return -1;
+}
+
+static int
+gtp_frame_head_find_trace(char *cur, ULONGEST trace)
+{
+ char *tmp;
+ int tfnum = gtp_frame_current_num;
+
+ if (cur)
+ tmp = cur;
+ else
+ tmp = gtp_frame_r_start;
+
+ do {
+ if (FID(tmp) == FID_HEAD) {
+ if (tfnum != gtp_frame_current_num) {
+ if (trace == *(ULONGEST *) (tmp + FID_SIZE
+ + sizeof(char *))) {
+ gtp_frame_current_num = tfnum;
+ gtp_frame_current = tmp;
+ return 0;
+ }
+ }
+ tfnum++;
+ }
+
+ tmp = gtp_frame_next(tmp);
+ if (!tmp)
+ break;
+
+ if (tmp == gtp_frame_end)
+ tmp = gtp_frame;
+ } while (tmp != gtp_frame_w_start);
+
+ return -1;
+}
+
+static int
+gtp_frame_head_find_num(int num)
+{
+ char *tmp = gtp_frame_r_start;
+ int tfnum = 0;
+
+ do {
+ if (FID(tmp) == FID_HEAD) {
+ if (tfnum == num) {
+ gtp_frame_current_num = num;
+ gtp_frame_current = tmp;
+ return 0;
+ }
+ tfnum++;
+ }
+
+ tmp = gtp_frame_next(tmp);
+ if (!tmp)
+ break;
+
+ if (tmp == gtp_frame_end)
+ tmp = gtp_frame;
+ } while (tmp != gtp_frame_w_start);
+
+ return -1;
+}
+
+static int
+gtp_gdbrsp_qtframe(char *pkg)
+{
+ int ret = -1;
+
+ if (gtp_start)
+ return -EBUSY;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qtframe: %s\n", pkg);
+#endif
+
+ if (atomic_read(>p_frame_create) == 0)
+ goto out;
+
+ if (strncmp(pkg, "pc:", 3) == 0) {
+ ULONGEST addr;
+
+ pkg += 3;
+
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ hex2ulongest(pkg, &addr);
+
+ ret = gtp_frame_head_find_addr(gtp_frame_current, 1,
+ (unsigned long)addr,
+ (unsigned long)addr);
+ } else if (strncmp(pkg, "tdp:", 4) == 0) {
+ ULONGEST trace;
+
+ pkg += 4;
+
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ hex2ulongest(pkg, &trace);
+
+ ret = gtp_frame_head_find_trace(gtp_frame_current, trace);
+ } else if (strncmp(pkg, "range:", 6) == 0) {
+ ULONGEST start, end;
+
+ pkg += 6;
+
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg = hex2ulongest(pkg, &start);
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg++;
+ hex2ulongest(pkg, &end);
+
+ ret = gtp_frame_head_find_addr(gtp_frame_current, 1,
+ (unsigned long)start,
+ (unsigned long)end);
+ } else if (strncmp(pkg, "outside:", 8) == 0) {
+ ULONGEST start, end;
+
+ pkg += 8;
+
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg = hex2ulongest(pkg, &start);
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg++;
+ hex2ulongest(pkg, &end);
+
+ ret = gtp_frame_head_find_addr(gtp_frame_current, 0,
+ (unsigned long)start,
+ (unsigned long)end);
+ } else {
+ ULONGEST num;
+
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ hex2ulongest(pkg, &num);
+
+ if (((int) num) < 0) {
+ /* Return to current. */
+ gtp_frame_current = NULL;
+ gtp_frame_current_num = 0;
+
+ return 0;
+ }
+ ret = gtp_frame_head_find_num((int) num);
+ }
+
+out:
+ if (ret) {
+ strcpy(gtp_rw_bufp, "F-1");
+ gtp_rw_bufp += 3;
+ gtp_rw_size += 3;
+ } else {
+ sprintf(gtp_rw_bufp, "F%xT%x",
+ gtp_frame_current_num,
+ (unsigned int)
+ *(ULONGEST *)(gtp_frame_current + FID_SIZE
+ + sizeof(char *)));
+ gtp_rw_size += strlen(gtp_rw_bufp);
+ gtp_rw_bufp += strlen(gtp_rw_bufp);
+ }
+ return 1;
+}
+
+static int
+gtp_gdbrsp_qtro(char *pkg)
+{
+ ULONGEST start, end;
+
+ gtpro_list_clear();
+
+ while (pkg[0]) {
+ pkg = hex2ulongest(pkg, &start);
+ if (pkg[0] != ',')
+ return -EINVAL;
+ pkg++;
+ pkg = hex2ulongest(pkg, &end);
+ if (pkg[0])
+ pkg++;
+
+ if (gtpro_list_add((CORE_ADDR)start, (CORE_ADDR)end) == NULL)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int
+gtp_gdbrsp_qtdv(char *pkg)
+{
+ ULONGEST num, val;
+ struct gtp_var *var;
+ char *src;
+
+ pkg = hex2ulongest(pkg, &num);
+ if (GTP_VAR_IS_SPECIAL(num))
+ return 0;
+ if (pkg[0] != ':')
+ return -EINVAL;
+ pkg++;
+ src = pkg;
+ pkg = hex2ulongest(pkg, &val);
+ if (pkg[0] != ':')
+ return -EINVAL;
+ pkg++;
+
+ var = gtp_var_find(num);
+ if (var)
+ return -EINVAL;
+
+ if (!gtp_var_add((unsigned int)num, (uint64_t)val, src))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int
+gtp_gdbrsp_QT(char *pkg)
+{
+ int ret = 1;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_QT: %s\n", pkg);
+#endif
+
+ if (strcmp("init", pkg) == 0)
+ ret = gtp_gdbrsp_qtinit();
+ else if (strcmp("Stop", pkg) == 0)
+ ret = gtp_gdbrsp_qtstop();
+ else if (strcmp("Start", pkg) == 0)
+ ret = gtp_gdbrsp_qtstart();
+ else if (strncmp("DP:", pkg, 3) == 0)
+ ret = gtp_gdbrsp_qtdp(pkg + 3);
+ else if (strncmp("DPsrc:", pkg, 6) == 0)
+ ret = gtp_gdbrsp_qtdpsrc(pkg + 6);
+ else if (strncmp("Disconnected:", pkg, 13) == 0)
+ ret = gtp_gdbrsp_qtdisconnected(pkg + 13);
+ else if (strncmp("Buffer:", pkg, 7) == 0)
+ ret = gtp_gdbrsp_qtbuffer(pkg + 7);
+ else if (strncmp("Frame:", pkg, 6) == 0)
+ ret = gtp_gdbrsp_qtframe(pkg + 6);
+ else if (strncmp("ro:", pkg, 3) == 0)
+ ret = gtp_gdbrsp_qtro(pkg + 3);
+ else if (strncmp("DV:", pkg, 3) == 0)
+ ret = gtp_gdbrsp_qtdv(pkg + 3);
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_QT: return %d\n", ret);
+#endif
+
+ return ret;
+}
+
+static int
+gtp_get_status(struct gtp_entry *tpe, char *buf)
+{
+ int size = 0;
+ int tfnum = 0;
+ CORE_ADDR tmpaddr;
+
+ if (!gtp_frame) {
+ sprintf(buf, "tnotrun:0;");
+ buf += 10;
+ size += 10;
+ } else if (!tpe || (tpe && tpe->reason == gtp_stop_normal)) {
+ sprintf(buf, "tstop:0;");
+ buf += 8;
+ size += 8;
+ } else {
+ char outtmp[100];
+
+ switch (tpe->reason) {
+ case gtp_stop_frame_full:
+ sprintf(buf, "tfull:%lx;",
+ (unsigned long)tpe->num);
+ break;
+ case gtp_stop_efault:
+ sprintf(buf, "terror:%s:%lx;",
+ string2hex("read memory false", outtmp),
+ (unsigned long)tpe->num);
+ break;
+ case gtp_stop_access_wrong_reg:
+ sprintf(buf, "terror:%s:%lx;",
+ string2hex("access wrong register", outtmp),
+ (unsigned long)tpe->num);
+ break;
+ case gtp_stop_agent_expr_code_error:
+ sprintf(buf, "terror:%s:%lx;",
+ string2hex("agent expression code error",
+ outtmp),
+ (unsigned long)tpe->num);
+ break;
+ case gtp_stop_agent_expr_stack_overflow:
+ sprintf(buf, "terror:%s:%lx;",
+ string2hex("agent expression stack overflow",
+ outtmp),
+ (unsigned long)tpe->num);
+ break;
+ default:
+ buf[0] = '\0';
+ break;
+ }
+
+ size += strlen(buf);
+ buf += strlen(buf);
+ }
+
+ if (atomic_read(>p_frame_create)) {
+ char *tmp = gtp_frame_r_start;
+
+ do {
+ if (FID(tmp) == FID_HEAD)
+ tfnum++;
+
+ tmp = gtp_frame_next(tmp);
+ if (!tmp)
+ break;
+
+ if (tmp == gtp_frame_end)
+ tmp = gtp_frame;
+ } while (tmp != gtp_frame_w_start);
+ }
+ sprintf(buf, "tframes:%x;", tfnum);
+ size += strlen(buf);
+ buf += strlen(buf);
+
+ sprintf(buf, "tcreated:%x;", atomic_read(>p_frame_create));
+ size += strlen(buf);
+ buf += strlen(buf);
+
+ sprintf(buf, "tsize:%x;", GTP_FRAME_SIZE);
+ size += strlen(buf);
+ buf += strlen(buf);
+
+ spin_lock(>p_frame_lock);
+ if (gtp_frame_is_circular)
+ tmpaddr = 0;
+ else
+ tmpaddr = GTP_FRAME_SIZE - (gtp_frame_w_start - gtp_frame);
+ spin_unlock(>p_frame_lock);
+ sprintf(buf, "tfree:%lx;", (unsigned long)tmpaddr);
+ size += strlen(buf);
+ buf += strlen(buf);
+
+ sprintf(buf, "circular:%x;", gtp_circular);
+ size += strlen(buf);
+ buf += strlen(buf);
+
+ sprintf(buf, "disconn:%x", gtp_disconnected_tracing);
+ size += strlen(buf);
+ buf += strlen(buf);
+
+ return size;
+}
+
+static int
+gtp_gdbrsp_qtstatus(void)
+{
+ struct gtp_entry *tpe;
+ int tmp;
+
+ for (tpe = gtp_list; tpe; tpe = tpe->next) {
+ if (tpe->reason != gtp_stop_normal)
+ break;
+ }
+
+ if (gtp_start && tpe) /* Tpe is stop, stop all tpes. */
+ gtp_gdbrsp_qtstop();
+
+ sprintf(gtp_rw_bufp, "T%x;", gtp_start ? 1 : 0);
+ gtp_rw_bufp += 3;
+ gtp_rw_size += 3;
+
+ tmp = gtp_get_status(tpe, gtp_rw_bufp);
+ gtp_rw_bufp += tmp;
+ gtp_rw_size += tmp;
+
+ return 1;
+}
+
+static void
+gtp_report_tracepoint(struct gtp_entry *gtp, char *buf)
+{
+ sprintf(buf, "T%lx:%lx:%c:%lx:%lx",
+ (unsigned long)gtp->num,
+ (unsigned long)gtp->addr,
+ (gtp->disable ? 'D' : 'E'),
+ (unsigned long)gtp->step,
+ (unsigned long)gtp->pass);
+}
+
+static void
+gtp_report_action(struct gtp_entry *gtp, struct action *action, char *buf)
+{
+ sprintf(buf, "A%lx:%lx:%s",
+ (unsigned long)gtp->num,
+ (unsigned long)gtp->addr,
+ action->src);
+}
+
+static void
+gtp_report_src(struct gtp_entry *gtp, struct gtpsrc *src, char *buf)
+{
+ sprintf(buf, "Z%lx:%lx:%s",
+ (unsigned long)gtp->num,
+ (unsigned long)gtp->addr,
+ src->src);
+}
+
+static void
+gtp_current_set_check(void)
+{
+ if (current_gtp_src == NULL)
+ current_gtp = current_gtp->next;
+}
+
+static void
+gtp_current_action_check(void)
+{
+ if (current_gtp_action == NULL) {
+ current_gtp_src = current_gtp->src;
+ gtp_current_set_check();
+ }
+}
+
+static int
+gtp_gdbrsp_qtfp(void)
+{
+ if (gtp_list) {
+ current_gtp = gtp_list;
+ gtp_report_tracepoint(current_gtp, gtp_rw_bufp);
+ gtp_rw_size += strlen(gtp_rw_bufp);
+ gtp_rw_bufp += strlen(gtp_rw_bufp);
+ current_gtp_action = current_gtp->action_list;
+ gtp_current_action_check();
+ } else {
+ gtp_rw_bufp[0] = 'l';
+ gtp_rw_size += 1;
+ gtp_rw_bufp += 1;
+ }
+
+ return 1;
+}
+
+static int
+gtp_gdbrsp_qtsp(void)
+{
+ if (current_gtp_action) {
+ gtp_report_action(current_gtp, current_gtp_action,
+ gtp_rw_bufp);
+ gtp_rw_size += strlen(gtp_rw_bufp);
+ gtp_rw_bufp += strlen(gtp_rw_bufp);
+ current_gtp_action = current_gtp_action->next;
+ gtp_current_action_check();
+ goto out;
+ }
+
+ if (current_gtp_src) {
+ gtp_report_src(current_gtp, current_gtp_src, gtp_rw_bufp);
+ gtp_rw_size += strlen(gtp_rw_bufp);
+ gtp_rw_bufp += strlen(gtp_rw_bufp);
+ current_gtp_src = current_gtp_src->next;
+ gtp_current_set_check();
+ goto out;
+ }
+
+ if (current_gtp) {
+ gtp_report_tracepoint(current_gtp, gtp_rw_bufp);
+ gtp_rw_size += strlen(gtp_rw_bufp);
+ gtp_rw_bufp += strlen(gtp_rw_bufp);
+ current_gtp_action = current_gtp->action_list;
+ gtp_current_action_check();
+ } else {
+ gtp_rw_bufp[0] = 'l';
+ gtp_rw_size += 1;
+ gtp_rw_bufp += 1;
+ }
+out:
+ return 1;
+}
+
+static void
+gtp_report_var(void)
+{
+ sprintf(gtp_rw_bufp, "%x:%s", current_gtp_var->num,
+ current_gtp_var->src);
+ gtp_rw_size += strlen(gtp_rw_bufp);
+ gtp_rw_bufp += strlen(gtp_rw_bufp);
+}
+
+static int
+gtp_gdbrsp_qtfsv(int f)
+{
+ if (f)
+ current_gtp_var = gtp_var_list;
+
+ if (current_gtp_var) {
+ gtp_report_var();
+ current_gtp_var = current_gtp_var->next;
+ } else {
+ gtp_rw_bufp[0] = 'l';
+ gtp_rw_size += 1;
+ gtp_rw_bufp += 1;
+ }
+
+ return 1;
+}
+
+static int
+gtp_gdbrsp_qtv(char *pkg)
+{
+ ULONGEST num;
+ struct gtp_var *var = NULL;
+ struct gtp_frame_var *vr = NULL;
+ uint64_t val;
+
+ pkg = hex2ulongest(pkg, &num);
+
+ if (gtp_start || !gtp_frame_current) {
+ if (!GTP_VAR_IS_SPECIAL(num)) {
+ var = gtp_var_find(num);
+ if (var)
+ val = var->val;
+ }
+ } else {
+ char *next;
+
+ for (next = *(char **)(gtp_frame_current + FID_SIZE); next;
+ next = *(char **)(next + FID_SIZE)) {
+ if (FID(next) == FID_VAR) {
+ vr = (struct gtp_frame_var *)
+ (next + FID_SIZE + sizeof(char *));
+ if (vr->num == (unsigned int)num)
+ goto while_stop;
+ }
+ }
+ vr = NULL;
+while_stop:
+ if (vr)
+ val = vr->val;
+ }
+
+ if (var || vr) {
+ sprintf(gtp_rw_bufp, "V%08x%08x",
+ (unsigned int) (val >> 32),
+ (unsigned int) (val & 0xffffffff));
+ gtp_rw_size += strlen(gtp_rw_bufp);
+ gtp_rw_bufp += strlen(gtp_rw_bufp);
+ } else {
+ gtp_rw_bufp[0] = 'U';
+ gtp_rw_size += 1;
+ gtp_rw_bufp += 1;
+ }
+
+ return 1;
+}
+
+static int
+gtp_gdbrsp_qT(char *pkg)
+{
+ int ret = 1;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_qT: %s\n", pkg);
+#endif
+
+ if (strcmp("Status", pkg) == 0)
+ ret = gtp_gdbrsp_qtstatus();
+ else if (strcmp("fP", pkg) == 0)
+ ret = gtp_gdbrsp_qtfp();
+ else if (strcmp("sP", pkg) == 0)
+ ret = gtp_gdbrsp_qtsp();
+ else if (strcmp("fV", pkg) == 0)
+ ret = gtp_gdbrsp_qtfsv(1);
+ else if (strcmp("sV", pkg) == 0)
+ ret = gtp_gdbrsp_qtfsv(0);
+ else if (strncmp("V:", pkg, 2) == 0)
+ ret = gtp_gdbrsp_qtv(pkg + 2);
+
+ return ret;
+}
+
+static uint8_t gtp_m_buffer[0xffff];
+
+static int
+gtp_gdbrsp_m(char *pkg)
+{
+ int i;
+ ULONGEST addr, len;
+
+ /* Get add and len. */
+ if (pkg[0] == '\0')
+ return -EINVAL;
+ pkg = hex2ulongest(pkg, &addr);
+ if (pkg[0] != ',')
+ return -EINVAL;
+ pkg++;
+ pkg = hex2ulongest(pkg, &len);
+ if (len == 0)
+ return -EINVAL;
+ len &= 0xffff;
+ len = (ULONGEST) min((int)((GTP_RW_MAX - 4 - gtp_rw_size) / 2),
+ (int)len);
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_m: addr = 0x%lx len = %d\n",
+ (unsigned long) addr, (int) len);
+#endif
+
+ if (gtp_start || !gtp_frame_current) {
+ if (probe_kernel_read(gtp_m_buffer, (void *)(CORE_ADDR)addr,
+ (size_t)len))
+ return -EFAULT;
+ } else {
+ char *next;
+ int ret;
+
+ /* The following part is for gtpro support.
+ It is not available because it make disassemble cannot
+ work when select a trace frame. */
+#if 0
+ struct gtpro_entry *gtroe;
+
+ memset(gtp_m_buffer, 0, len);
+
+ /* Read the gtpro. */
+ for (gtroe = gtpro_list; gtroe; gtroe = gtroe->next) {
+ CORE_ADDR cur_start, cur_end;
+
+ cur_start = max(gtroe->start, (CORE_ADDR)addr);
+ cur_end = min(gtroe->end, ((CORE_ADDR)(addr + len)));
+ if (cur_start < cur_end) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_m: ro read "
+ "start = 0x%lx end = 0x%lx\n",
+ (unsigned long) cur_start,
+ (unsigned long) cur_end);
+#endif
+ if (probe_kernel_read(gtp_m_buffer,
+ (void *)cur_start,
+ (size_t)(cur_end
+ - cur_start)))
+ return -EFAULT;
+ }
+ }
+#endif
+ ret = probe_kernel_read(gtp_m_buffer, (void *)(CORE_ADDR)addr,
+ (size_t)len);
+
+ for (next = *(char **)(gtp_frame_current + FID_SIZE); next;
+ next = *(char **)(next + FID_SIZE)) {
+ if (FID(next) == FID_MEM) {
+ struct gtp_frame_mem *mr;
+ ULONGEST cur_start, cur_end;
+ uint8_t *buf;
+
+ mr = (struct gtp_frame_mem *)
+ (next + FID_SIZE + sizeof(char *));
+ buf = next + GTP_FRAME_MEM_SIZE;
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_m: section "
+ "addr = 0x%lx size = %lu\n",
+ (unsigned long) mr->addr,
+ (unsigned long) mr->size);
+#endif
+ cur_start = max(((ULONGEST)mr->addr), addr);
+ cur_end = min(((ULONGEST)mr->addr
+ + mr->size),
+ (addr + len));
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_m: read "
+ "start = 0x%lx end = 0x%lx\n",
+ (unsigned long) cur_start,
+ (unsigned long) cur_end);
+#endif
+ if (cur_start < cur_end) {
+ memcpy(gtp_m_buffer,
+ buf + cur_start - mr->addr,
+ cur_end - cur_start);
+ ret = 0;
+ }
+ }
+ }
+
+ if (ret)
+ return -EFAULT;
+ }
+
+ for (i = 0; i < (int)len; i++) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_gdbrsp_m: %d %02x\n", i, gtp_m_buffer[i]);
+#endif
+ sprintf(gtp_rw_bufp, "%02x", gtp_m_buffer[i]);
+ gtp_rw_bufp += 2;
+ gtp_rw_size += 2;
+ }
+
+ return 1;
+}
+
+static int
+gtp_gdbrsp_g(void)
+{
+ char *next;
+ struct pt_regs *regs;
+
+ if (GTP_RW_MAX - 4 - gtp_rw_size < GTP_REG_ASCII_SIZE)
+ return -E2BIG;
+
+ if (gtp_start || !gtp_frame_current) {
+ memset(gtp_rw_bufp, '0', GTP_REG_ASCII_SIZE);
+ goto out;
+ }
+
+ /* Get the regs. */
+ regs = NULL;
+ for (next = *(char **)(gtp_frame_current + FID_SIZE); next;
+ next = *(char **)(next + FID_SIZE)) {
+ if (FID(next) == FID_REG) {
+ regs = (struct pt_regs *)
+ (next + FID_SIZE + sizeof(char *));
+ break;
+ }
+ }
+ if (regs)
+ gtp_regs2ascii(regs, gtp_rw_bufp);
+ else {
+ struct pt_regs pregs;
+ struct gtp_entry *tpe;
+
+ memset(&pregs, '\0', sizeof(struct pt_regs));
+ tpe = gtp_list_find(*(ULONGEST *)(gtp_frame_current
+ + FID_SIZE + sizeof(char *)));
+ if (tpe)
+ GTP_REGS_PC(&pregs) = (unsigned long)tpe->addr;
+ gtp_regs2ascii(&pregs, gtp_rw_bufp);
+ }
+out:
+ gtp_rw_bufp += GTP_REG_ASCII_SIZE;
+ gtp_rw_size += GTP_REG_ASCII_SIZE;
+
+ return 1;
+}
+
+static DEFINE_SEMAPHORE(gtp_rw_lock);
+static DECLARE_WAIT_QUEUE_HEAD(gtp_rw_wq);
+static unsigned int gtp_rw_count;
+
+static int
+gtp_open(struct inode *inode, struct file *file)
+{
+ int ret = 0;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_open\n");
+#endif
+
+ down(>p_rw_lock);
+ if (gtp_rw_count == 0) {
+ gtp_read_ack = 0;
+ gtp_rw_buf = vmalloc(GTP_RW_MAX);
+ if (!gtp_rw_buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ }
+ gtp_rw_count++;
+
+out:
+ up(>p_rw_lock);
+ return ret;
+}
+
+static int
+gtp_release(struct inode *inode, struct file *file)
+{
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_release\n");
+#endif
+
+ down(>p_rw_lock);
+ gtp_rw_count--;
+ if (gtp_rw_count == 0) {
+ vfree(gtp_rw_buf);
+
+ if (!gtp_disconnected_tracing) {
+ gtp_gdbrsp_qtstop();
+ gtp_gdbrsp_qtinit();
+ if (gtp_frame) {
+ vfree(gtp_frame);
+ gtp_frame = NULL;
+ }
+ }
+ }
+ up(>p_rw_lock);
+
+ return 0;
+}
+
+static long
+gtp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_ioctl: %x\n", cmd);
+#endif
+
+ return 0;
+}
+
+static ssize_t
+gtp_write(struct file *file, const char __user *buf, size_t size,
+ loff_t *ppos)
+{
+ char *rsppkg = NULL;
+ int i, ret;
+ unsigned char csum = 0;
+
+ if (down_interruptible(>p_rw_lock))
+ return -EINTR;
+
+ if (size == 0) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_write: try write 0 size.\n");
+#endif
+ goto error_out;
+ }
+
+ size = min(size, (size_t) GTP_RW_MAX);
+ if (copy_from_user(gtp_rw_buf, buf, size)) {
+ size = -EFAULT;
+ goto error_out;
+ }
+
+ if (gtp_rw_buf[0] == '+' || gtp_rw_buf[0] == '-'
+ || gtp_rw_buf[0] == '\3') {
+ if (gtp_rw_buf[0] == '+')
+ gtp_rw_size = 0;
+ size = 1;
+ goto out;
+ }
+
+ if (size < 4) {
+ gtp_read_ack = '-';
+ goto out;
+ }
+ /* Check format and crc and get the rsppkg. */
+ for (i = 0; i < size - 2; i++) {
+ if (rsppkg == NULL) {
+ if (gtp_rw_buf[i] == '$')
+ rsppkg = gtp_rw_buf + i + 1;
+ } else {
+ if (gtp_rw_buf[i] == '#')
+ break;
+ else
+ csum += gtp_rw_buf[i];
+ }
+ }
+ if (rsppkg && gtp_rw_buf[i] == '#') {
+ /* Format is OK. Check crc. */
+ unsigned char c1, c2;
+
+ gtp_rw_buf[i] = '\0';
+
+ c1 = gtp_rw_buf[i+1];
+ c2 = gtp_rw_buf[i+2];
+ if (csum == (c1 << 4) + c2) {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_write: crc error\n");
+#endif
+ gtp_read_ack = '-';
+ goto out;
+ }
+ } else {
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_write: format error\n");
+#endif
+ gtp_read_ack = '-';
+ goto out;
+ }
+ gtp_read_ack = '+';
+ size = i + 3;
+
+ wake_up_interruptible_nr(>p_rw_wq, 1);
+
+ up(>p_rw_lock);
+ if (down_interruptible(>p_rw_lock))
+ return -EINTR;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_write: %s\n", rsppkg);
+#endif
+
+ /* Handle rsppkg and put return to gtp_rw_buf. */
+ gtp_rw_buf[0] = '$';
+ gtp_rw_bufp = gtp_rw_buf + 1;
+ gtp_rw_size = 0;
+ ret = 1;
+ switch (rsppkg[0]) {
+ case '?':
+ strcpy(gtp_rw_bufp, "S05");
+ gtp_rw_bufp += 3;
+ gtp_rw_size += 3;
+ break;
+ case 'g':
+ ret = gtp_gdbrsp_g();
+ break;
+ case 'm':
+ ret = gtp_gdbrsp_m(rsppkg + 1);
+ break;
+ case 'Q':
+ if (rsppkg[1] == 'T')
+ ret = gtp_gdbrsp_QT(rsppkg + 2);
+ break;
+ case 'q':
+ if (rsppkg[1] == 'T')
+ ret = gtp_gdbrsp_qT(rsppkg + 2);
+ else if (strncmp("qSupported", rsppkg, 10) == 0) {
+ strcpy(gtp_rw_bufp,
+ "ConditionalTracepoints+;"
+ "TracepointSource+;DisconnectedTracing+");
+ gtp_rw_size += strlen(gtp_rw_bufp);
+ gtp_rw_bufp += strlen(gtp_rw_bufp);
+ ret = 1;
+ }
+ break;
+ case 's':
+ case 'S':
+ case 'c':
+ case 'C':
+ ret = -1;
+ break;
+ }
+ if (ret == 0) {
+ strcpy(gtp_rw_bufp, "OK");
+ gtp_rw_bufp += 2;
+ gtp_rw_size += 2;
+ } else if (ret < 0) {
+ sprintf(gtp_rw_bufp, "E%02x", -ret);
+ gtp_rw_bufp += 3;
+ gtp_rw_size += 3;
+ }
+
+ gtp_rw_bufp[0] = '#';
+ csum = 0;
+ for (i = 1; i < gtp_rw_size + 1; i++)
+ csum += gtp_rw_buf[i];
+ gtp_rw_bufp[1] = TOHEX(csum >> 4);
+ gtp_rw_bufp[2] = TOHEX(csum & 0x0f);
+ gtp_rw_bufp = gtp_rw_buf;
+ gtp_rw_size += 4;
+
+out:
+ wake_up_interruptible_nr(>p_rw_wq, 1);
+error_out:
+ up(>p_rw_lock);
+ return size;
+}
+
+static ssize_t
+gtp_read(struct file *file, char __user *buf, size_t size,
+ loff_t *ppos)
+{
+ int err;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_read\n");
+#endif
+
+ if (size == 0)
+ goto out;
+
+ if (down_interruptible(>p_rw_lock))
+ return -EINTR;
+
+ if (gtp_read_ack) {
+ err = put_user(gtp_read_ack, buf);
+ if (err) {
+ size = -err;
+ goto out;
+ }
+ gtp_read_ack = 0;
+ size = 1;
+ goto out;
+ }
+
+ size = min(gtp_rw_size, size);
+ if (size == 0)
+ goto out;
+ if (copy_to_user(buf, gtp_rw_bufp, size)) {
+ size = -EFAULT;
+ goto out;
+ }
+ gtp_rw_bufp += size;
+ gtp_rw_size -= size;
+
+out:
+ up(>p_rw_lock);
+ return size;
+}
+
+static unsigned int
+gtp_poll(struct file *file, poll_table *wait)
+{
+ unsigned int mask = POLLOUT | POLLWRNORM;
+
+#ifdef GTP_DEBUG
+ printk(GTP_DEBUG "gtp_poll\n");
+#endif
+
+ down(>p_rw_lock);
+ poll_wait(file, >p_rw_wq, wait);
+ if (gtp_read_ack || gtp_rw_size)
+ mask |= POLLIN | POLLRDNORM;
+ up(>p_rw_lock);
+
+ return mask;
+}
+
+static char *
+gtp_frame_file_realloc(size_t *real_size, size_t size, int is_end)
+{
+ if (*real_size < gtp_frame_file_size + size) {
+ char *tmp;
+
+ *real_size = gtp_frame_file_size + size;
+ if (!is_end)
+ *real_size += 100;
+
+ tmp = vmalloc(*real_size);
+ if (!tmp) {
+ vfree(gtp_frame_file);
+ return NULL;
+ }
+
+ memcpy(tmp, gtp_frame_file, gtp_frame_file_size);
+ vfree(gtp_frame_file);
+ gtp_frame_file = tmp;
+ }
+
+ return gtp_frame_file + gtp_frame_file_size;
+}
+
+static int
+gtp_frame2file_m(size_t *real_sizep, uint32_t *data_size, char *frame)
+{
+ struct gtp_frame_mem *mr;
+ uint8_t *buf;
+ ULONGEST addr;
+ size_t remaining;
+
+ mr = (struct gtp_frame_mem *) (frame + FID_SIZE + sizeof(char *));
+ buf = frame + GTP_FRAME_MEM_SIZE;
+ addr = mr->addr;
+ remaining = mr->size;
+
+ while (remaining > 0) {
+ uint16_t blocklen;
+ char *wbuf;
+ size_t sp;
+
+ blocklen = remaining > 65535 ? 65535 : remaining;
+
+ sp = 1 + sizeof(addr) + sizeof(blocklen) + blocklen;
+ wbuf = gtp_frame_file_realloc(real_sizep, sp, 0);
+ if (!wbuf)
+ return -1;
+
+ wbuf[0] = 'M';
+ wbuf += 1;
+
+ memcpy(wbuf, &addr, sizeof(addr));
+ wbuf += sizeof(addr);
+
+ memcpy(wbuf, &blocklen, sizeof(blocklen));
+ wbuf += sizeof(blocklen);
+
+ memcpy(wbuf, buf, blocklen);
+
+ addr += blocklen;
+ remaining -= blocklen;
+ buf += blocklen;
+
+ gtp_frame_file_size += sp;
+ *data_size += sp;
+ }
+
+ return 0;
+}
+
+static int
+gtp_frame2file_v(size_t *real_sizep, uint32_t *data_size, char *frame)
+{
+ struct gtp_frame_var *vr;
+ size_t sp = 1 + sizeof(unsigned int)
+ + sizeof(uint64_t);
+ char *wbuf;
+
+ wbuf = gtp_frame_file_realloc(real_sizep, sp, 0);
+ if (!wbuf)
+ return -1;
+
+ vr = (struct gtp_frame_var *) (frame + FID_SIZE + sizeof(char *));
+
+ wbuf[0] = 'V';
+ wbuf += 1;
+
+ memcpy(wbuf, &vr->num, sizeof(unsigned int));
+ wbuf += sizeof(unsigned int);
+
+ memcpy(wbuf, &vr->val, sizeof(uint64_t));
+ wbuf += sizeof(uint64_t);
+
+ gtp_frame_file_size += sp;
+ *data_size += sp;
+
+ return 0;
+}
+
+static int
+gtp_frame2file(size_t *real_sizep, char *frame)
+{
+ int16_t *tmp16p;
+ char *next;
+ char *wbuf;
+ uint32_t data_size;
+
+ /* Head. */
+ tmp16p = (int16_t *)gtp_frame_file_realloc(real_sizep, 2, 0);
+ if (!tmp16p)
+ return -1;
+ *tmp16p = (int16_t)*(ULONGEST *)(frame + FID_SIZE + sizeof(char *));
+ gtp_frame_file_size += 2;
+ /* This part is for the data_size. */
+ wbuf = gtp_frame_file_realloc(real_sizep, 4, 0);
+ if (!wbuf)
+ return -1;
+ gtp_frame_file_size += 4;
+
+ /* Body. */
+ data_size = 0;
+ for (next = *(char **)(frame + FID_SIZE); next;
+ next = *(char **)(next + FID_SIZE)) {
+ switch (FID(next)) {
+ case FID_REG:
+ wbuf = gtp_frame_file_realloc(real_sizep,
+ GTP_REG_BIN_SIZE + 1,
+ 0);
+ if (!wbuf)
+ return -1;
+ wbuf[0] = 'R';
+ gtp_regs2bin((struct pt_regs *)(next + FID_SIZE
+ + sizeof(char *)),
+ wbuf + 1);
+ gtp_frame_file_size += GTP_REG_BIN_SIZE + 1;
+ data_size += GTP_REG_BIN_SIZE + 1;
+ break;
+
+ case FID_MEM:
+ if (gtp_frame2file_m(real_sizep, &data_size, next))
+ return -1;
+ break;
+
+ case FID_VAR:
+ if (gtp_frame2file_v(real_sizep, &data_size, next))
+ return -1;
+ break;
+ }
+ }
+
+ /* Set the data_size. */
+ memcpy(gtp_frame_file + gtp_frame_file_size - data_size - 4,
+ &data_size, 4);
+
+ return 0;
+}
+
+static ssize_t
+gtpframe_read(struct file *file, char __user *buf, size_t size,
+ loff_t *ppos)
+{
+ ssize_t ret = -ENOMEM;
+
+ down(>p_rw_lock);
+
+ if (gtp_start) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ /* Set gtp_frame_file if need. */
+ if (!gtp_frame_file) {
+ size_t real_size;
+ char *wbuf;
+ struct gtp_entry *tpe;
+ struct gtp_var *tvar;
+ int tmpsize;
+ char tmpbuf[200];
+ char *frame;
+
+ if (gtp_frame_is_circular)
+ real_size = GTP_FRAME_SIZE;
+ else
+ real_size = gtp_frame_w_start - gtp_frame;
+ real_size += 200;
+
+ gtp_frame_file = vmalloc(real_size);
+ if (!gtp_frame_file)
+ goto out;
+ gtp_frame_file_size = 0;
+
+ /* Head. */
+ wbuf = gtp_frame_file;
+ strcpy(wbuf, "\x7fTRACE0\n");
+ gtp_frame_file_size += 8;
+
+ /* BUG: will be a new value. */
+ snprintf(tmpbuf, 200, "R %x\n", GTP_REG_BIN_SIZE);
+ wbuf = gtp_frame_file_realloc(&real_size, strlen(tmpbuf), 0);
+ if (!wbuf)
+ goto out;
+ strcpy(wbuf, tmpbuf);
+ gtp_frame_file_size += strlen(tmpbuf);
+
+ strcpy(tmpbuf, "status 0;");
+ wbuf = gtp_frame_file_realloc(&real_size, strlen(tmpbuf), 0);
+ if (!wbuf)
+ goto out;
+ strcpy(wbuf, tmpbuf);
+ gtp_frame_file_size += strlen(tmpbuf);
+
+ for (tpe = gtp_list; tpe; tpe = tpe->next) {
+ if (tpe->reason != gtp_stop_normal)
+ break;
+ }
+ tmpsize = gtp_get_status(tpe, tmpbuf);
+ wbuf = gtp_frame_file_realloc(&real_size, tmpsize, 0);
+ if (!wbuf)
+ goto out;
+ memcpy(wbuf, tmpbuf, tmpsize);
+ gtp_frame_file_size += tmpsize;
+
+ wbuf = gtp_frame_file_realloc(&real_size, 1, 0);
+ if (!wbuf)
+ goto out;
+ wbuf[0] = '\n';
+ gtp_frame_file_size += 1;
+
+ /* Tval. */
+ for (tvar = gtp_var_list; tvar; tvar = tvar->next) {
+ snprintf(tmpbuf, 200, "tsv %x:%s\n", tvar->num,
+ tvar->src);
+ wbuf = gtp_frame_file_realloc(&real_size,
+ strlen(tmpbuf), 0);
+ if (!wbuf)
+ goto out;
+ strcpy(wbuf, tmpbuf);
+ gtp_frame_file_size += strlen(tmpbuf);
+ }
+
+ /* Tracepoint. */
+ for (tpe = gtp_list; tpe; tpe = tpe->next) {
+ struct action *ae;
+ struct gtpsrc *src;
+
+ /* Tpe. */
+ gtp_report_tracepoint(tpe, tmpbuf);
+ wbuf = gtp_frame_file_realloc(&real_size,
+ strlen(tmpbuf) + 5, 0);
+ if (!wbuf)
+ goto out;
+ sprintf(wbuf, "tp %s\n", tmpbuf);
+ gtp_frame_file_size += strlen(tmpbuf) + 4;
+ /* Action. */
+ for (ae = tpe->action_list; ae; ae = ae->next) {
+ gtp_report_action(tpe, ae, tmpbuf);
+ wbuf = gtp_frame_file_realloc
+ (&real_size, strlen(tmpbuf) + 5, 0);
+ if (!wbuf)
+ goto out;
+ sprintf(wbuf, "tp %s\n", tmpbuf);
+ gtp_frame_file_size += strlen(tmpbuf) + 4;
+ }
+ /* Src. */
+ for (src = tpe->src; src; src = src->next) {
+ gtp_report_src(tpe, src, tmpbuf);
+ wbuf = gtp_frame_file_realloc
+ (&real_size, strlen(tmpbuf) + 5, 0);
+ if (!wbuf)
+ goto out;
+ sprintf(wbuf, "tp %s\n", tmpbuf);
+ gtp_frame_file_size += strlen(tmpbuf) + 4;
+ }
+ }
+
+ wbuf = gtp_frame_file_realloc(&real_size, 1, 0);
+ if (!wbuf)
+ goto out;
+ wbuf[0] = '\n';
+ gtp_frame_file_size += 1;
+
+ /* Frame. */
+ if (atomic_read(>p_frame_create) == 0)
+ goto end;
+ frame = gtp_frame_r_start;
+ do {
+ if (FID(frame) == FID_HEAD) {
+ if (gtp_frame2file(&real_size, frame))
+ goto out;
+ }
+
+ frame = gtp_frame_next(frame);
+ if (!frame)
+ break;
+
+ if (frame == gtp_frame_end)
+ frame = gtp_frame;
+ } while (frame != gtp_frame_w_start);
+
+end:
+ /* End. */
+ wbuf = gtp_frame_file_realloc(&real_size, tmpsize, 2);
+ if (!wbuf)
+ goto out;
+ wbuf[0] = '\0';
+ wbuf[1] = '\0';
+ gtp_frame_file_size += 2;
+ }
+
+ /* Set buf. */
+ ret = size;
+ if (*ppos + ret > gtp_frame_file_size) {
+ ret = gtp_frame_file_size - *ppos;
+ if (ret <= 0) {
+ ret = 0;
+ goto out;
+ }
+ }
+ if (copy_to_user(buf, gtp_frame_file + *ppos, ret)) {
+ size = -EFAULT;
+ goto out;
+ }
+ *ppos += ret;
+
+out:
+ up(>p_rw_lock);
+ return ret;
+}
+
+static const struct file_operations gtp_operations = {
+ .owner = THIS_MODULE,
+ .open = gtp_open,
+ .release = gtp_release,
+ .unlocked_ioctl = gtp_ioctl,
+ .compat_ioctl = gtp_ioctl,
+ .read = gtp_read,
+ .write = gtp_write,
+ .poll = gtp_poll,
+};
+
+static const struct file_operations gtpframe_operations = {
+ .owner = THIS_MODULE,
+ .open = gtp_open,
+ .release = gtp_release,
+ .read = gtpframe_read,
+ .llseek = default_llseek,
+};
+
+struct dentry *gtp_dir;
+struct dentry *gtpframe_dir;
+
+static int __init gtp_init(void)
+{
+ int ret = -ENOMEM;
+
+ gtp_list = NULL;
+ gtp_read_ack = 0;
+ gtp_rw_bufp = NULL;
+ gtp_rw_size = 0;
+ gtp_start = 0;
+ gtp_disconnected_tracing = 0;
+ gtp_circular = 0;
+ gtp_var_list = GTP_VAR_LIST_FIRST;
+ gtp_var_head = GTP_VAR_SPECIAL_MIN;
+ gtp_var_tail = GTP_VAR_SPECIAL_MAX;
+ gtp_var_array = NULL;
+ current_gtp_var = NULL;
+ gtp_frame = NULL;
+ gtp_frame_r_start = NULL;
+ gtp_frame_w_start = NULL;
+ gtp_frame_end = NULL;
+ gtp_frame_is_circular = 0;
+ gtp_frame_current = NULL;
+ gtp_frame_current_num = 0;
+ atomic_set(>p_frame_create, 0);
+ gtp_rw_count = 0;
+ current_gtp = NULL;
+ current_gtp_action = NULL;
+ current_gtp_src = NULL;
+ gtpro_list = NULL;
+ gtp_frame_file = NULL;
+ gtp_frame_file_size = 0;
+ gtp_dir = NULL;
+ gtpframe_dir = NULL;
+
+ gtp_wq = create_singlethread_workqueue("gtpd");
+ if (gtp_wq == NULL)
+ goto out;
+
+ gtp_dir = debugfs_create_file("gtp", S_IFIFO | S_IRUSR | S_IWUSR, NULL,
+ NULL, >p_operations);
+ if (gtp_dir == NULL || gtp_dir == ERR_PTR(-ENODEV)) {
+ gtp_dir = NULL;
+ goto out;
+ }
+ gtpframe_dir = debugfs_create_file("gtpframe", S_IFIFO | S_IRUSR, NULL,
+ NULL, >pframe_operations);
+ if (gtpframe_dir == NULL || gtpframe_dir == ERR_PTR(-ENODEV)) {
+ gtpframe_dir = NULL;
+ goto out;
+ }
+
+ ret = 0;
+out:
+ if (ret < 0) {
+ if (gtp_wq)
+ destroy_workqueue(gtp_wq);
+
+ if (gtp_dir != NULL)
+ debugfs_remove_recursive(gtp_dir);
+ if (gtpframe_dir != NULL)
+ debugfs_remove_recursive(gtpframe_dir);
+ }
+
+ return 0;
+}
+
+static void __exit gtp_exit(void)
+{
+ if (gtp_dir != NULL)
+ debugfs_remove_recursive(gtp_dir);
+ if (gtpframe_dir != NULL)
+ debugfs_remove_recursive(gtpframe_dir);
+
+ gtp_gdbrsp_qtstop();
+ gtp_gdbrsp_qtinit();
+ if (gtp_frame) {
+ vfree(gtp_frame);
+ gtp_frame = NULL;
+ }
+
+ destroy_workqueue(gtp_wq);
+}
+
+module_init(gtp_init)
+module_exit(gtp_exit)
+
+MODULE_AUTHOR("Hui Zhu <[email protected]>");
+MODULE_LICENSE("GPL");
--- /dev/null
+++ b/scripts/getgtprsp.pl
@@ -0,0 +1,102 @@
+#!/usr/bin/perl
+
+# This script to get the GDB tracepoint RSP package and save it
+# to ./gtpstart and ./gtpstop file.
+# GPL
+# Copyright(C) Hui Zhu ([email protected]), 2010
+
+binmode STDIN, ":raw";
+$| = 1;
+
+$status = 0;
+$circular = 0;
+$var_count = 0;
+
+while (1) {
+ sysread STDIN, $c, 1 or next;
+ if ($c eq '') {
+ next;
+ } elsif ($c eq '+' || $c eq '-') {
+ $c = '';
+ }
+
+ sysread STDIN, $line, 1024 or next;
+ print '+';
+ $line = $c.$line;
+
+ open(LOG, ">>./log");
+ print LOG $line."\n";
+ close (LOG);
+
+ if ($status == 0) {
+ if ($line eq '$?#3f') {
+ print '$S05#b8';
+ } elsif ($line eq '$g#67') {
+ print '$00000000#80';
+ } elsif ($line =~ /^\$m/ || $line =~ /^\$p/) {
+ print '$00000000#80';
+ } elsif ($line eq '$qTStatus#49') {
+ print '$T0;tnotrun:0;tframes:0;tcreated:0;tsize:';
+ print '500000;tfree:500000;circular:0;disconn:0#d1';
+ } elsif ($line eq '$QTBuffer:circular:1#f9') {
+ print '$OK#9a';
+ $circular = 1;
+ } elsif ($line eq '$QTBuffer:circular:0#f8') {
+ print '$OK#9a';
+ $circular = 0;
+ } elsif ($line eq '$QTStop#4b') {
+ print '$OK#9a';
+ } elsif ($line =~ /^\$qSupported/) {
+ print '$ConditionalTracepoints+;TracepointSource+#1b';
+ } elsif ($line eq '$QTinit#59') {
+ $status = 1;
+ open(STARTFILE, ">./gtpstart");
+ print STARTFILE '$QTDisconnected:1#e3'."\n";
+ if ($circular) {
+ print STARTFILE '$QTBuffer:circular:1#f9'."\n";
+ } else {
+ print STARTFILE '$QTBuffer:circular:0#f8'."\n";
+ }
+ } elsif ($line eq '$qTfV#81') {
+ print '$8:0:1:64756d705f737461636b#f6';
+ } elsif ($line eq '$qTsV#8e') {
+ if ($var_count == 0) {
+ print '$7:0:1:7072696e746b5f666f726d6174#9b';
+ } elsif ($var_count == 1) {
+ print '$6:8:1:7072696e746b5f6c6576656c#3a';
+ } elsif ($var_count == 2) {
+ print '$5:0:1:7072696e746b5f746d70#28';
+ } elsif ($var_count == 3) {
+ print '$4:0:1:6370755f6964#f3';
+ } elsif ($var_count == 4) {
+ print '$3:0:1:636c6f636b#e1';
+ } elsif ($var_count == 5) {
+ print '$2:0:1:63757272656e745f7468726561';
+ print '645f696e666f#1f';
+ } elsif ($var_count == 6) {
+ print '$1:0:1:63757272656e745f7461736b#c7';
+ } else {
+ print '$l#6c';
+ }
+ $var_count++;
+ } else {
+ print '$#00';
+ }
+ }
+
+ if ($status == 1) {
+ print '$OK#9a';
+
+ print STARTFILE $line."\n";
+
+ if ($line eq '$QTStart#b3') {
+ $status = 0;
+
+ close(STARTFILE);
+
+ open(STOPFILE, ">./gtpstop");
+ print STOPFILE '$QTStop#4b'."\n";
+ close(STOPFILE);
+ }
+ }
+}
On 4/24/11, Hui Zhu <[email protected]> wrote:
> KGTP is a realtime and lightweight Linux Kernel GDB debugger and
> tracer that use Kprobe.
>
> It make Linux Kernel supply a GDB remote debug interface. Then GDB in
> current machine or remote machine(see "Make GDB connect to gtp") can
> debug Linux through GDB tracepoint without stop the Linux Kernel. And
> even if the board doesn't have GDB on it and doesn't have
> interface for remote debug. It can debug the Linux Kernel use offline
> debug (See "Offline debug").
>
> It support X86-32, X86-64, MIPS and ARM.
> http://www.tudou.com/programs/view/_p6VTgxmCRA/ This is a video(in
> Chinese) to show how to use it.
>
> Now, KGTP 20110424 release.
> You can get the package for it from
> http://kgtp.googlecode.com/files/kgtp_20110424.tar.bz2
> or
> svn co https://kgtp.googlecode.com/svn/tags/20110424
>
> The main change of this verion is add a special trace state variables
> $dump_stack, "collect" it will let Linux Kernel output stack dump
> directly.
> Following example let Linux Kernel show the stack dump of vfs_readdir:
> trace vfs_readdir
> commands
> collect $dump_stack
> end
> Then your kernel will printk like:
>
> [22779.208064] gtp 1:Pid: 441, comm: python Not tainted 2.6.39-rc3+ #46
> [22779.208068] Call Trace:
> [22779.208072] [<fe653cca>] gtp_get_var+0x4a/0xa0 [gtp]
> [22779.208076] [<fe653d79>] gtp_collect_var+0x59/0xa0 [gtp]
> [22779.208080] [<fe655974>] gtp_action_x+0x1bb4/0x1dc0 [gtp]
> [22779.208084] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
> [22779.208088] [<c023f152>] ? __find_get_block_slow+0xd2/0x160
> [22779.208091] [<c01a8c56>] ? delayacct_end+0x96/0xb0
> [22779.208100] [<c023f404>] ? __find_get_block+0x84/0x1d0
> [22779.208103] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
> [22779.208106] [<c02e0838>] ? find_revoke_record+0xa8/0xc0
> [22779.208109] [<c02e0c45>] ? jbd2_journal_cancel_revoke+0xd5/0xe0
> [22779.208112] [<c02db51f>] ? __jbd2_journal_temp_unlink_buffer+0x2f/0x110
> [22779.208115] [<fe655c4c>] gtp_kp_pre_handler+0xcc/0x1c0 [gtp]
> [22779.208118] [<c05b8a88>] kprobe_exceptions_notify+0x3d8/0x440
> [22779.208121] [<c05b7d54>] ? hw_breakpoint_exceptions_notify+0x14/0x180
> [22779.208124] [<c05b95eb>] ? sub_preempt_count+0x7b/0xb0
> [22779.208126] [<c0227ac5>] ? vfs_readdir+0x15/0xb0
> [22779.208128] [<c0227ac4>] ? vfs_readdir+0x14/0xb0
> [22779.208131] [<c05b9743>] notifier_call_chain+0x43/0x60
> [22779.208134] [<c05b9798>] __atomic_notifier_call_chain+0x38/0x50
> [22779.208137] [<c05b97cf>] atomic_notifier_call_chain+0x1f/0x30
> [22779.208140] [<c05b980d>] notify_die+0x2d/0x30
> [22779.208142] [<c05b71c5>] do_int3+0x35/0xa0
>
> Add a special trace state variables $clock. Access it in tracepoint
> condition and action will get the return of local_clock() that return
> the timestamp in nanoseconds.
>
> And according to Steven Rostedt's mail, move the interface from proc
> to debug fs. So, access kgtp need change to /sys/kernel/debug/gtp.
>
> The other change is:
> Make frame align better.
> Change sp_checked to type 0xff, Change stack of x from local to static.
> Fix the bug of $printk_tmp.
> Make getgtprsp.pl support special trace state variables.
>
> You can read the doc gtp.txt to get how to use kgtp.
>
> And according to the comments of Christoph. I make a patch for Linux
> Kernel and make it looks OK with checkpatch.pl.
>
> Signed-off-by: Hui Zhu <[email protected]>
>
> ---
> Documentation/trace/gtp.txt | 873 +++++++
> arch/arm/include/asm/gtp.h | 13
> arch/mips/include/asm/gtp.h | 18
> arch/x86/include/asm/gtp.h | 18
> lib/Kconfig.debug | 9
> lib/Makefile | 2
> lib/gtp.c | 5104
> ++++++++++++++++++++++++++++++++++++++++++++
> scripts/getgtprsp.pl | 102
> 8 files changed, 6139 insertions(+)
>
> --- /dev/null
> +++ b/Documentation/trace/gtp.txt
> @@ -0,0 +1,873 @@
> + Linux Kernel GDB tracepoint module (KGTP)
> + =========================================
> + By Hui Zhu <[email protected]>
> + https://code.google.com/p/kgtp/wiki/HOWTO
> + 2011-04-24
> +
> +Table of contents
> +-----------------
> +
> +What is KGTP
> +Report issue about KGTP
> +Get info about GDB tracepoint
> +Get KGTP through http
> +Get KGTP through svn
> +Config KGTP
> +Compile KGTP
> +Install KGTP
> +Uninstall KGTP
> +Howto use
> + Exec it
> + Make GDB connect to gtp
> + Add module symbols to GDB
> + Get GDB tracepoint commands
> + Get registers info from Kernel
> + Get the value of variable from Kernel
> + How to use use tracepoint condition
> + How to use trace state variables
> + Simple trace state variables
> + Special trace state variables $current_task,
> + $current_thread_info, $cpu_id, $dump_stack, $printk_level,
> + $printk_format, $printk_tmp and $clock
> + Show all the traced data of current frame
> + Get backtrace info from Kernel
> + Howto let tracepoint output value directly
> + Output stack dump directly
> + Switch collect to output the value directly
> + Use printf command in actions
> + Get status of KGTP from Kernel
> + Set the trace buffer into a circular buffer
> + Do not stop tracepoint when the GDB disconnect
> + Howto show the variable that value of it is optimized
> + Linux kernel "Compile with almost no optimization" patch
> + Update your GCC
> + Offline debug
> +
> +
> +
> +
> +What is KGTP
> +------------
> +
> +KGTP is a realtime and lightweight Linux Kernel GDB debugger and tracer
> that
> +use Kprobe.
> +
> +It make Linux Kernel supply a GDB remote debug interface. Then GDB in
> current
> +machine or remote machine(see "Make GDB connect to gtp") can debug Linux
> +through GDB tracepoint without stop the Linux Kernel.
> +And even if the board doesn't have GDB on it and doesn't have interface for
> +remote debug. It can debug the Linux Kernel use offline debug (See "Offline
> +debug").
> +It support X86-32, X86-64, MIPS and ARM.
> +http://www.tudou.com/programs/view/_p6VTgxmCRA/ This is a video(in Chinese)
> +to show how to use it.
> +
> +
> +
> +
> +Report issue about KGTP
> +-----------------------
> +You can post it in https://code.google.com/p/kgtp/issues/list or write
> Email
> +to [email protected].
> +
> +
> +
> +
> +Get info about GDB tracepoint
> +-----------------------------
> +Please goto
> http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
> +
> +
> +
> +
> +Get KGTP through http
> +---------------------
> +Please goto http://code.google.com/p/kgtp/downloads/list OR UPDATE to down
> +the package.
> +
> +
> +
> +
> +Get KGTP through svn
> +--------------------
> +Some people have trouble with access to KGTP website. You can access kgtp
> +through svn:
> +
> +------------------------------------------------------------
> +svn checkout http://kgtp.googlecode.com/svn/ kgtp-read-only
> +------------------------------------------------------------
> +
> +kgtp-read-only/tags/ There is the each release of KGTP.
> +kgtp-read-only/trunk/ There is the main trunk of KGTP.
> +
> +
> +
> +
> +Config KGTP
> +-----------
> +
> +Before compile KGTP, you can choice which Kernel you want build with and
> +which compiler you want through change the Makefile. For example:
> +
> +-------------------------------------------
> +KERNELDIR := /lib/modules/`uname -r`/build
> +CROSS_COMPILE :=
> +-------------------------------------------
> +
> +KERNELDIR is set the directory which Kernel you want build for. Now it set
> to
> +the current kernel that you use.
> +CROSS_COMPILE is set the compiler that you want to build the KGTP. Empty
> mean
> +use current compiler.
> +ARCH is the architecture.
> +
> +------------------------------------------
> +KERNELDIR := /home/teawater/kernel/bamd64
> +CROSS_COMPILE :=x86_64-glibc_std-
> +ARCH := x86_64
> +------------------------------------------
> +
> +KERNELDIR is set to /home/teawater/kernel/bamd64. Compiler will
> +use x86_64-glibc_std-gcc.
> +
> +
> +
> +
> +Compile KGTP
> +------------
> +
> +For normal use:
> +
> +---------
> +cd kgtp/
> +make
> +---------
> +
> +If you want KGTP out the debug message,please use following (It is
> available
> +after 20100825):
> +
> +---------
> +cd kgtp/
> +make D=1
> +---------
> +
> +
> +
> +
> +Install KGTP
> +------------
> +
> +------------------
> +cd kgtp/
> +sudo make install
> +------------------
> +
> +
> +
> +
> +Uninstall KGTP
> +--------------
> +
> +--------------------
> +cd kgtp/
> +sudo make uninstall
> +--------------------
> +
> +
> +
> +
> +Howto use
> +---------
> +
> +Exec it
> +-------
> +
> +If you had installed the KGTP in your system, you can:
> +
> +------------------
> +sudo modprobe gtp
> +------------------
> +
> +Or you can use the kgtp module in the directory.
> +
> +-------------------
> +cd kgtp/
> +sudo insmod gtp.ko
> +-------------------
> +
> +
> +
> +Make GDB connect to gtp
> +-----------------------
> +
> +In current machine:
> +
> +---------------------------------
> +sudo gdb ./vmlinux
> +(gdb) target remote /sys/kernel/debug/gtp
> +Remote debugging using /sys/kernel/debug/gtp
> +0x0000000000000000 in ?? ()
> +---------------------------------
> +
> +In remote machine:
> +
> +---------------------------------------------
> +#Open the KGTP interface in current machine.
> +sudo su
> +nc -l 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp
> +(nc -l -p 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp for old
> version
> +netcat.)
> +#Let gdb connect to the port 1234
> +gdb ./vmlinux
> +(gdb) target remote xxx.xxx.xxx.xxx:1234
> +---------------------------------------------
> +
> +
> +
> +Add module symbols to GDB
> +-------------------------
> +
> +Sometime, you need add the Linux Kernel module(lkm) symbols to GDB to debug
> it.
> +Following a example howto add ext3.ko's symbols to GDB:
> +
> +--------------------------------------------------------------------------------
> +cat /proc/modules | grep ext
> +ext3 116512 3 - Live 0xf9083000
> +#Get the address 0xf9083000.
> +modinfo ext3
> +filename: /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> +#Get the directory name of ext3.
> +(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> 0xf9083000
> +#Then, GDB get the symbols of ext3.
> +--------------------------------------------------------------------------------
> +
> +You will see that it just add the text section info to GDB, sometime you
> need
> +add another section info of other section, for example:
> +
> +--------------------------------------------------------------------------------
> +cat /sys/module/ext3/sections/.bss
> +0xf908170c
> +#Get the bss address 0xf908170c.
> +(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> 0xf9083000 -s .bss 0xf908170c
> +#Then, GDB get the symbols of ext3.
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Get GDB tracepoint commands
> +---------------------------
> +
> +Please goto
> http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
> +
> +
> +Get registers info from Kernel
> +------------------------------
> +
> +Following part is an example that record the value of all registers when
> Linux
> +Kernel call function "vfs_readdir".
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xc01a1ac0: file
> +/home/teawater/kernel/linux-2.6/fs/readdir.c, line 23.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +>collect $reg
> +>end
> +(gdb) tstart
> +(gdb) shell ls
> +(gdb) tstop
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 0xc01a1ac1 in vfs_readdir (file=0xc5528d00, filler=0xc01a1900
> <filldir64>,
> + buf=0xc0d09f90) at /home/teawater/kernel/linux-2.6/fs/readdir.c:23
> +23 /home/teawater/kernel/linux-2.6/fs/readdir.c: No such file or
> directory.
> + in /home/teawater/kernel/linux-2.6/fs/readdir.c
> +(gdb) info reg
> +eax 0xc5528d00 -984445696
> +ecx 0xc0d09f90 -1060069488
> +edx 0xc01a1900 -1072031488
> +ebx 0xfffffff7 -9
> +esp 0xc0d09f8c 0xc0d09f8c
> +ebp 0x0 0x0
> +esi 0x8061480 134616192
> +edi 0xc5528d00 -984445696
> +eip 0xc01a1ac1 0xc01a1ac1 <vfs_readdir+1>
> +eflags 0x286 [ PF SF IF ]
> +cs 0x60 96
> +ss 0x8061480 134616192
> +ds 0x7b 123
> +es 0x7b 123
> +fs 0x0 0
> +gs 0x0 0
> +(gdb) tfind
> +Found trace frame 1, tracepoint 1
> +0xc01a1ac1 23 in /home/teawater/kernel/linux-2.6/fs/readdir.c
> +(gdb) info reg
> +eax 0xc5528d00 -984445696
> +ecx 0xc0d09f90 -1060069488
> +edx 0xc01a1900 -1072031488
> +ebx 0xfffffff7 -9
> +esp 0xc0d09f8c 0xc0d09f8c
> +ebp 0x0 0x0
> +esi 0x8061480 134616192
> +edi 0xc5528d00 -984445696
> +eip 0xc01a1ac1 0xc01a1ac1 <vfs_readdir+1>
> +eflags 0x286 [ PF SF IF ]
> +cs 0x60 96
> +ss 0x8061480 134616192
> +ds 0x7b 123
> +es 0x7b 123
> +fs 0x0 0
> +gs 0x0 0
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Get the value of variable from Kernel
> +-------------------------------------
> +
> +Following part is an example that record the value of "jiffies_64" when
> Linux
> +Kernel call function "vfs_readdir".
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xc01ed740: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +>collect jiffies_64
> +>collect file->f_path.dentry->d_iname
> +>end
> +(gdb) tstart
> +(gdb) shell ls
> +arch drivers include kernel mm Module.symvers
> security System.map virt
> +block firmware init lib modules.builtin net
> sound t vmlinux
> +crypto fs ipc Makefile modules.order scripts
> source usr vmlinux.o
> +(gdb) tstop
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 0xc01ed741 in vfs_readdir (file=0xf4063000, filler=0xc01ed580
> <filldir64>, buf=0xd6dfdf90)
> + at /home/teawater/kernel/linux-2.6/fs/readdir.c:24
> +24 {
> +(gdb) p jiffies_64
> +$1 = 4297248706
> +(gdb) p file->f_path.dentry->d_iname
> +$1 = "b26", '\000' <repeats 28 times>
> +--------------------------------------------------------------------------------
> +
> +
> +
> +How to use use tracepoint condition
> +-----------------------------------
> +
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoint-Conditions.html
> +Like the breakpoint, we can set condition to tracepoint. But it speed is
> more
> +fast than breakpoint's condition because KGTP do all the condition check.
> +For example:
> +
> +------------------------------
> +(gdb) trace handle_irq
> +(gdb) condition 1 (irq == 47)
> +------------------------------
> +
> +This action of tracepoint 1 will work only when irq number is 47.
> +
> +
> +
> +How to use trace state variables
> +--------------------------------
> +
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Trace-State-Variables.html
> +Tracepoint have special variables. You can trace it or use it in tracepoint
> +condition.
> +Note that only GDB 7.2.1 and later version support use trace state
> variables
> +directly, the old version GDB just can show the value of trace state
> variables
> +through command "info tvariables".
> +
> +
> +Simple trace state variables
> +----------------------------
> +
> +Define a trace state variable $c.
> +
> +-------------------
> +(gdb) tvariable $c
> +-------------------
> +
> +Trace state variable $c created, with initial value 0.
> +Use it in the action. Follow action will use $c to count how much irq
> happen
> +in Kernel.
> +
> +-----------------------------------------------------------------------
> +(gdb) trace handle_irq
> +(gdb) actions
> +Enter actions for tracepoint 3, one per line.
> +End with a line saying just "end".
> +>collect $c #Save current value of $c to the trace frame buffer.
> +>teval $c=$c+1 #Increase the $c.
> +>end
> +-----------------------------------------------------------------------
> +
> +You can get the current value of $c when the trace is running or stop.
> +
> +----------------------------------
> +(gdb) tstart
> +(gdb) info tvariables
> +$c 0 31554
> +(gdb) p $c
> +$5 = 33652
> +(gdb) tstop
> +(gdb) p $c
> +$9 = 105559
> +----------------------------------
> +
> +When use the tfind parse the trace frame buffer, if the value of trace
> state
> +variable is collect. You can use it.
> +
> +------------------------------
> +(gdb) tstop
> +(gdb) tfind
> +(gdb) info tvariables
> +$c 0 0
> +(gdb) p $c
> +$6 = 0
> +(gdb) tfind 100
> +(gdb) p $c
> +$7 = 100
> +------------------------------
> +
> +
> +Special trace state variables $current_task, $current_thread_info, $cpu_id,
> +$dump_stack, $printk_level, $printk_format, $printk_tmp and $clock
> +--------------------------------------------------------------------------
> +
> +KGTP have special trace state variables $current_task,
> $current_thread_info,
> +$cpu_id and $clock can very easy to access to some special value. You can
> see
> +them when GDB connect to the KGTP. You can use them in tracepoint condition
> +or actions.
> +Access $current_task in tracepoint condition and action will get the return
> +of get_current().
> +Access $current_thread_info in tracepoint condition and action will get the
> +return of current_thread_info().
> +Access $cpu_id in tracepoint condition and action will get the return of
> +smp_processor_id().
> +Access $clock in tracepoint condition and action will get the return of
> +local_clock() that return the timestamp in nanoseconds.
> +
> +And KGTP have other special trace state variables $dump_stack,
> $printk_level,
> +$printk_format and $printk_tmp, all of them are for output value directly
> that
> +will introduce in "Howto let tracepoint output value directly".
> +
> +Following example will count process 16663 call how many sys_read in $c
> +and collect the struct thread_info of current task:
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_read if ((*(struct task_struct *)$current_task)->pid ==
> 16663)
> +(gdb) tvariable $c
> +(gdb) actions
> +Enter actions for tracepoint 4, one per line.
> +End with a line saying just "end".
> +>teval $c=$c+1
> +>collect (*(struct thread_info *)$current_thread_info)
> +>end
> +(gdb) tstart
> +(gdb) info tvariables
> +Name Initial Current
> +$c 0 184
> +$current_task 0 <unknown>
> +$current_thread_info 0 <unknown>
> +$cpu_id 0 <unknown>
> +(gdb) tstop
> +(gdb) tfind
> +(gdb) p *(struct thread_info *)$current_thread_info
> +$10 = {task = 0xf0ac6580, exec_domain = 0xc07b1400, flags = 0, status
> = 0, cpu = 1, preempt_count = 2, addr_limit = {
> + seg = 4294967295}, restart_block = {fn = 0xc0159fb0
> <do_no_restart_syscall>, {{arg0 = 138300720, arg1 = 11,
> + arg2 = 1, arg3 = 78}, futex = {uaddr = 0x83e4d30, val = 11,
> flags = 1, bitset = 78, time = 977063750,
> + uaddr2 = 0x0}, nanosleep = {index = 138300720, rmtp = 0xb,
> expires = 335007449089}, poll = {
> + ufds = 0x83e4d30, nfds = 11, has_timeout = 1, tv_sec = 78,
> tv_nsec = 977063750}}},
> + sysenter_return = 0xb77ce424, previous_esp = 0, supervisor_stack =
> 0xef340044 "", uaccess_err = 0}
> +--------------------------------------------------------------------------------
> +
> +nother example can show how much sys_read() execute in each cpu.
> +
> +--------------------------------------
> +tvariable $c0
> +tvariable $c1
> +trace sys_read
> + condition $bpnum ($cpu_id == 0)
> + commands
> + teval $c0=$c0+1
> + end
> +trace sys_read
> + condition $bpnum ($cpu_id == 1)
> + commands
> + teval $c1=$c1+1
> + end
> +info tvariables
> +Name Initial Current
> +$current_task 0 <unknown>
> +$cpu_id 0 <unknown>
> +$c0 0 3255
> +$c1 0 1904
> +--------------------------------------
> +
> +sys_read() execute 3255 times in cpu0 and 1904 times in cpu1.
> +
> +
> +
> +Show all the traced data of current frame
> +-----------------------------------------
> +
> +--------------------------------------------------------------------------------
> +(gdb) tdump
> +Data collected at tracepoint 1, trace frame 0:
> +$cr = void
> +file->f_path.dentry->d_iname =
> "gtp\000.google.chrome.g05ZYO\000\235", <incomplete sequence \364>
> +jiffies_64 = 4319751455
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Get backtrace info from Kernel
> +------------------------------
> +
> +We can get the backtrace through collect the stack.
> +In x86_32, following action command will collect 512 bytes of stack.
> +
> +-----------------------------------
> +collect *(unsigned char *)$esp@512
> +-----------------------------------
> +
> +In x86_64, following command will collect 512 bytes of stack.
> +
> +-----------------------------------
> +collect *(unsigned char *)$rsp@512
> +-----------------------------------
> +
> +In MIPS or ARM, following command will collect 512 bytes of stack.
> +----------------------------------
> +collect *(unsigned char *)$sp@512
> +-----------------------------------
> +
> +Following part is an example about howto backtrace in x86_64:
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xffffffff8113f7fc: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +>collect *(unsigned char *)$rsp@512
> +>end
> +(gdb) tstart
> +(gdb) shell ls
> +2 block firmware i ipc Makefile
> modules.order scripts source t~ vmlinux
> +a.out crypto fs include kernel mm
> Module.symvers security System.map usr vmlinux.o
> +arch drivers gdb.txt init lib modules.builtin net
> sound t virt
> +(gdb) tstop
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 0xffffffff8113f7fd in vfs_readdir (file=0xffff880075f00780,
> filler=0xffffffff8113f630 <filldir>, buf=0xffff880005785f38)
> + at ./linux-2.6/fs/readdir.c:24
> +24 {
> +(gdb) bt
> +#0 0xffffffff8113f7fd in vfs_readdir (file=0xffff880075f00780,
> filler=0xffffffff8113f630 <filldir>, buf=0xffff880005785f38)
> + at ./linux-2.6/fs/readdir.c:24
> +#1 0xffffffff8113fa14 in sys_getdents (fd=<value optimized out>,
> dirent=0x801108, count=32768)
> + at ./linux-2.6/fs/readdir.c:214
> +#2 0xffffffff8100af42 in ?? () at
> ./linux-2.6/arch/x86/kernel/entry_64.S:487
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Howto let tracepoint output value directly
> +------------------------------------------
> +
> +In the previous parts, you can get that to get the value from Linux Kernel
> you
> +need use tracepoint action "collect" save value to the tracepoint frame and
> +use GDB command "tfind" parse the the value out from the frame.
> +But we want get the value directly sometime, so KGTP support two ways to
> output
> +value directly.
> +
> +
> +Output stack dump directly
> +--------------------------
> +KGTP have special trace state variables $dump_stack, "collect" it will let
> +Linux Kernel output stack dump directly.
> +
> +Following example let Linux Kernel show the stack dump of vfs_readdir:
> +
> +--------------------------------------------------------------------------------
> +trace vfs_readdir
> + commands
> + collect $dump_stack
> + end
> +--------------------------------------------------------------------------------
> +
> +Then your kernel will printk like:
> +
> +--------------------------------------------------------------------------------
> +[22779.208064] gtp 1:Pid: 441, comm: python Not tainted 2.6.39-rc3+ #46
> +[22779.208068] Call Trace:
> +[22779.208072] [<fe653cca>] gtp_get_var+0x4a/0xa0 [gtp]
> +[22779.208076] [<fe653d79>] gtp_collect_var+0x59/0xa0 [gtp]
> +[22779.208080] [<fe655974>] gtp_action_x+0x1bb4/0x1dc0 [gtp]
> +[22779.208084] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
> +[22779.208088] [<c023f152>] ? __find_get_block_slow+0xd2/0x160
> +[22779.208091] [<c01a8c56>] ? delayacct_end+0x96/0xb0
> +[22779.208100] [<c023f404>] ? __find_get_block+0x84/0x1d0
> +[22779.208103] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
> +[22779.208106] [<c02e0838>] ? find_revoke_record+0xa8/0xc0
> +[22779.208109] [<c02e0c45>] ? jbd2_journal_cancel_revoke+0xd5/0xe0
> +[22779.208112] [<c02db51f>] ? __jbd2_journal_temp_unlink_buffer+0x2f/0x110
> +[22779.208115] [<fe655c4c>] gtp_kp_pre_handler+0xcc/0x1c0 [gtp]
> +[22779.208118] [<c05b8a88>] kprobe_exceptions_notify+0x3d8/0x440
> +[22779.208121] [<c05b7d54>] ? hw_breakpoint_exceptions_notify+0x14/0x180
> +[22779.208124] [<c05b95eb>] ? sub_preempt_count+0x7b/0xb0
> +[22779.208126] [<c0227ac5>] ? vfs_readdir+0x15/0xb0
> +[22779.208128] [<c0227ac4>] ? vfs_readdir+0x14/0xb0
> +[22779.208131] [<c05b9743>] notifier_call_chain+0x43/0x60
> +[22779.208134] [<c05b9798>] __atomic_notifier_call_chain+0x38/0x50
> +[22779.208137] [<c05b97cf>] atomic_notifier_call_chain+0x1f/0x30
> +[22779.208140] [<c05b980d>] notify_die+0x2d/0x30
> +[22779.208142] [<c05b71c5>] do_int3+0x35/0xa0
> +--------------------------------------------------------------------------------
> +
> +
> +Switch collect to output the value directly
> +-------------------------------------------
> +
> +KGTP have special trace state variables $printk_level, $printk_format
> +and $printk_tmp to support this function.
> +
> +$printk_level, if its value is 8 (this is the default value), "collect"
> will
> +save value to the tracepoint frame.
> +If its value is 0-7, "collect" will output the value through "printk"
> directly,
> +and value will be the level of printk. The level is:
> +0 KERN_EMERG system is unusable
> +1 KERN_ALERT action must be taken immediately
> +2 KERN_CRIT critical conditions
> +3 KERN_ERR error conditions
> +4 KERN_WARNING warning conditions
> +5 KERN_NOTICE normal but significant condition
> +6 KERN_INFO informational
> +7 KERN_DEBUG debug-level messages
> +
> +$printk_format, collect printk will output value in the format that set by
> it.
> +The format is:
> +0 This is the default value.
> + If the size of collect value is 1, 2, 4 or 8, it will be outputted as
> + a unsigned decimal.
> + If not, it will be outputted as a hexadecimal string.
> +1 Output value in signed decimal.
> +2 Output value in unsigned decimal.
> +3 Output value in unsigned hexadecimal.
> +4 Output value as a string.
> +5 Output value as a hexadecimal string.
> +
> +$printk_tmp, to output the value of global variable need set to it first.
> +
> +Following example show the a count number, pid, jiffies_64 and the file
> name
> +that call vfs_readdir:
> +
> +--------------------------------------------------------------------------------
> +tvariable $c
> +trace vfs_readdir
> + commands
> + teval $printk_level=0
> + collect $c=$c+1
> + collect (*(struct task_struct *)$current_task)->pid
> + collect $printk_tmp=jiffies_64
> + teval $printk_format=4
> + collect file->f_path.dentry->d_iname
> + end
> +--------------------------------------------------------------------------------
> +
> +Then your kernel will printk like:
> +
> +--------------------------------------------------------------------------------
> +gtp 1:$c=$c+1=41
> +gtp 1:(*(struct task_struct *)$current_task)->pid=12085
> +gtp 1:$printk_tmp=jiffies_64=4322021438
> +gtp 1:file->f_path.dentry->d_iname=b26
> +gtp 1:$c=$c+1=42
> +gtp 1:(*(struct task_struct *)$current_task)->pid=12085
> +gtp 1:$printk_tmp=jiffies_64=4322021438
> +gtp 1:file->f_path.dentry->d_iname=b26
> +--------------------------------------------------------------------------------
> +
> +"gtp 1" mean that it output by tracepoint 1.
> +
> +
> +Use printf command in actions
> +-----------------------------
> +
> +This way have a trouble is GDB is still not accept the patch that make
> +tracepoint support printf, So if you want use it, you need patch the patch
> in
> +http://sourceware.org/ml/gdb-patches/2011-03/msg00022.html and build your
> +GDB with yourself.
> +
> +Following example show the a count number, pid and the file name that call
> +vfs_readdir:
> +
> +--------------------------------------------------------------------------------
> +tvariable $c
> +trace vfs_readdir
> + commands
> + printf "<0>%d pid=%d name:%s\n", $c=$c+1, (*(struct task_struct
> *)$current_task)->pid, file->f_path.dentry->d_iname
> + end
> +--------------------------------------------------------------------------------
> +
> +Then your kernel will printk like:
> +
> +--------------------------------------------------------------------------------
> +1 pid=10888 name:bin
> +2 pid=10888 name:bin
> +3 pid=10893 name:teawater
> +4 pid=10893 name:teawater
> +--------------------------------------------------------------------------------
> +
> +Like what we use printk in Linux Kernel, please add kernel loglevel
> in the begin
> +and add "\n" in the end.
> +The kernel loglevel is:
> +KERN_EMERG "<0>" system is unusable
> +KERN_ALERT "<1>" action must be taken immediately
> +KERN_CRIT "<2>" critical conditions
> +KERN_ERR "<3>" error conditions
> +KERN_WARNING "<4>" warning conditions
> +KERN_NOTICE "<5>" normal but significant condition
> +KERN_INFO "<6>" informational
> +KERN_DEBUG "<7>" debug-level messages
> +
> +
> +
> +Get status of KGTP from Kernel
> +------------------------------
> +Please use GDB command "tstatus"
> +
> +
> +
> +Set the trace buffer into a circular buffer
> +-------------------------------------------
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Starting-and-Stopping-Trace-Experiments.html
> +The frame buffer is not a circular buffer by default. When the buffer is
> full,
> +the tracepoint will stop.
> +
> +-----------------------------
> +set circular-trace-buffer on
> +-----------------------------
> +
> +Set frame buffer to a circular buffer. When the buffer is full, it will
> auto
> +discard traceframes (oldest first) and keep trace.
> +
> +
> +
> +Do not stop tracepoint when the GDB disconnect
> +----------------------------------------------
> +
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Starting-and-Stopping-Trace-Experiments.html
> +The KGTP will stop and delete the trace frame when GDB disconnect with it
> by
> +default.
> +
> +----------------------------
> +set disconnected-tracing on
> +----------------------------
> +will open the KGTP disconnect-trace. After that, when GDB disconnect with
> KGTP,
> +KGTP will not stop trace. And after GDB reconnect to KGTP, it can keep
> control
> +the KGTP like nothing happen.
> +
> +
> +
> +Howto show the variable that value of it is optimized
> +-----------------------------------------------------
> +
> +Sometimes, GDB will output some value like:
> +
> +-------------------------------------------
> +inode has been optimized out of existence.
> +res has been optimized out of existence.
> +-------------------------------------------
> +
> +That is because value of inode and res is optimized. Linux Kernel is built
> +with -O2 so you will get this trouble sometimes.
> +There are 2 ways to handle it:
> +
> +Linux kernel "Compile with almost no optimization" patch
> +--------------------------------------------------------
> +If you do not care about the speed when you debug the Kernel, you can use
> the
> +patch for Linux Kernel in
> +http://code.google.com/p/kgtp/downloads/detail?name=co.patch It add a
> option
> +in "Kernel hacking" called "Compile with almost no optimization". It will
> make
> +kernel be built without -O2. It support x86_32, x86_64 and arm.
> +
> +Update your GCC
> +---------------
> +The VTA branch(http://gcc.gnu.org/wiki/Var_Tracking_Assignments) was merged
> +for GCC 4.5 Which helps a lot with generating dwarf for previously
> +"optimized out" values.
> +
> +
> +
> +Offline debug
> +-------------
> +
> +In the PC that can run the GDB:
> +Change the "target remote XXXX" to
> +
> +------------------------------------------
> +(gdb) target remote | perl ./getgtprsp.pl
> +------------------------------------------.
> +
> +After that, set tracepoint and start it as usual:
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xffffffff8114f3c0: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +#If your GDB support tracepoint "printf" (see "Howto use tracepoint
> printf"), use it to show the value directly is better.
> +>collect $reg
> +>end
> +(gdb) tstart
> +(gdb) stop
> +(gdb) quit
> +--------------------------------------------------------------------------------
> +
> +Then you can find files gtpstart and gtpstop. Copy it to the machine that
> you
> +want debug.
> +
> +
> +In the debuged machine after insmod the gtp.ko:
> +Start the tracepoint:
> +
> +------------------------------------
> +cat gtpstart > /sys/kernel/debug/gtp
> +------------------------------------
> +
> +Stop the tracepoint:
> +
> +-----------------------------------
> +cat gtpstop > /sys/kernel/debug/gtp
> +-----------------------------------
> +
> +You can let Linux Kernel show the value directly, please see "Howto let
> +tracepoint output value directly".
> +
> +If you want save the value to the trace frame and parse later, you can use
> file
> +"/sys/kernel/debug/gtpframe" that have the trace frame. Copy it to the PC
> that
> +has GDB.
> +
> +In the PC that can run the GDB:
> +
> +--------------------------------------------------------------------------------
> +(gdb) target tfile ./gtpframe
> +Tracepoint 1 at 0xffffffff8114f3dc: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +Created tracepoint 1 for target's tracepoint 1 at 0xffffffff8114f3c0.
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 vfs_readdir (file=0xffff880036e8f300, filler=0xffffffff8114f240
> <filldir>, buf=0xffff880001e5bf38)
> + at /home/teawater/kernel/linux-2.6/fs/readdir.c:24
> +24 {
> +--------------------------------------------------------------------------------
> --- /dev/null
> +++ b/arch/arm/include/asm/gtp.h
> @@ -0,0 +1,13 @@
> +#ifndef _ASM_ARM_GTP_H_
> +#define _ASM_ARM_GTP_H_
> +
> +#define ULONGEST uint64_t
> +#define LONGEST int64_t
> +#define CORE_ADDR unsigned long
> +
> +#define GTP_REGS_PC(regs) ((regs)->uregs[15])
> +
> +#define GTP_REG_ASCII_SIZE 336
> +#define GTP_REG_BIN_SIZE 168
> +
> +#endif
> --- /dev/null
> +++ b/arch/mips/include/asm/gtp.h
> @@ -0,0 +1,18 @@
> +#ifndef _ASM_MIPS_GTP_H_
> +#define _ASM_MIPS_GTP_H_
> +
> +#define ULONGEST uint64_t
> +#define LONGEST int64_t
> +#define CORE_ADDR unsigned long
> +
> +#define GTP_REGS_PC(regs) ((regs)->cp0_epc)
> +
> +#ifdef CONFIG_32BIT
> +#define GTP_REG_ASCII_SIZE 304
> +#define GTP_REG_BIN_SIZE 152
> +#else
> +#define GTP_REG_ASCII_SIZE 608
> +#define GTP_REG_BIN_SIZE 304
> +#endif
> +
> +#endif
> --- /dev/null
> +++ b/arch/x86/include/asm/gtp.h
> @@ -0,0 +1,18 @@
> +#ifndef _ASM_X86_GTP_H_
> +#define _ASM_X86_GTP_H_
> +
> +#define ULONGEST uint64_t
> +#define LONGEST int64_t
> +#define CORE_ADDR unsigned long
> +
> +#define GTP_REGS_PC(regs) ((regs)->ip)
> +
> +#ifdef CONFIG_X86_32
> +#define GTP_REG_ASCII_SIZE 128
> +#define GTP_REG_BIN_SIZE 64
> +#else
> +#define GTP_REG_ASCII_SIZE 296
> +#define GTP_REG_BIN_SIZE 148
> +#endif
> +
> +#endif
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1253,6 +1253,15 @@ config ASYNC_RAID6_TEST
>
> If unsure, say N.
>
> +config GTP
> + tristate "GDB tracepoint support"
> + depends on X86 || ARM || MIPS
> + depends on KPROBES
> + depends on DEBUG_FS
> + ---help---
> + Supply GDB tracepoint interface in /sys/kernel/debug/gtp.
> + See https://code.google.com/p/kgtp/wiki/HOWTO
> +
> source "samples/Kconfig"
>
> source "lib/Kconfig.kgdb"
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -115,6 +115,8 @@ obj-$(CONFIG_AVERAGE) += average.o
>
> obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
>
> +obj-$(CONFIG_GTP) += gtp.o
> +
> hostprogs-y := gen_crc32table
> clean-files := crc32table.h
>
> --- /dev/null
> +++ b/lib/gtp.c
> @@ -0,0 +1,5104 @@
> +/*
> + * Kernel GDB tracepoint module.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
> USA.
> + *
> + * Copyright(C) Hui Zhu ([email protected]), 2010, 2011
> + */
> +
> +#include <linux/version.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/uaccess.h>
> +#include <linux/vmalloc.h>
> +#include <linux/poll.h>
> +#include <linux/kprobes.h>
> +#include <linux/debugfs.h>
> +#include <asm/gtp.h>
> +
> +#define KERN_NULL
> +
> +#ifdef GTPDEBUG
> +#define GTP_DEBUG KERN_WARNING
> +#endif
> +
> +#define GTP_RW_MAX 16384
> +
> +#define FRAME_ALIGN_SIZE sizeof(unsigned int)
> +#define FRAME_ALIGN(x) ((x + FRAME_ALIGN_SIZE - 1) \
> + & (~(FRAME_ALIGN_SIZE - 1)))
> +
> +#define FID_TYPE unsigned int
> +#define FID_SIZE sizeof(FID_TYPE)
> +#define FID(x) (*((FID_TYPE *)x))
> +#define FID_HEAD 0
> +#define FID_REG 1
> +#define FID_MEM 2
> +#define FID_VAR 3
> +#define FID_END 4
> +
> +/* GTP_FRAME_SIZE must align with FRAME_ALIGN_SIZE. */
> +#define GTP_FRAME_SIZE 5242880
> +#define GTP_FRAME_HEAD_SIZE (FID_SIZE + sizeof(char *) + sizeof(ULONGEST))
> +#define GTP_FRAME_REG_SIZE (FID_SIZE + sizeof(char *) \
> + + sizeof(struct pt_regs))
> +#define GTP_FRAME_MEM_SIZE (FID_SIZE + sizeof(char *) \
> + + sizeof(struct gtp_frame_mem))
> +#define GTP_FRAME_VAR_SIZE (FID_SIZE + sizeof(char *) \
> + + sizeof(struct gtp_frame_var))
> +
> +#define TOHEX(h) ((h) > 9 ? (h) + 'a' - 10 : (h) + '0')
> +
> +struct action_agent_exp {
> + unsigned int size;
> + uint8_t *buf;
> + int need_var_lock;
> +};
> +
> +struct action_m {
> + int regnum;
> + CORE_ADDR offset;
> + size_t size;
> +};
> +
> +struct action {
> + struct action *next;
> + unsigned char type;
> + char *src;
> + union {
> + ULONGEST reg_mask;
> + struct action_agent_exp exp;
> + struct action_m m;
> + } u;
> +};
> +
> +struct gtpsrc {
> + struct gtpsrc *next;
> + char *src;
> +};
> +
> +enum gtp_stop_type {
> + gtp_stop_normal = 0,
> + gtp_stop_frame_full,
> + gtp_stop_efault,
> + gtp_stop_access_wrong_reg,
> + gtp_stop_agent_expr_code_error,
> + gtp_stop_agent_expr_stack_overflow,
> +};
> +
> +struct gtp_entry {
> + struct gtp_entry *next;
> + int disable;
> + ULONGEST num;
> + ULONGEST addr;
> + ULONGEST step;
> + ULONGEST pass;
> + int nopass;
> + atomic_t current_pass;
> + int kpreg;
> + struct kprobe kp;
> + struct work_struct work;
> + enum gtp_stop_type reason;
> + struct action *cond;
> + struct action *action_list;
> + struct gtpsrc *src;
> + int have_printk;
> + struct gtpsrc *printk_str;
> +};
> +
> +struct gtp_var {
> + struct gtp_var *next;
> + unsigned int num;
> + uint64_t val;
> + char *src;
> +};
> +
> +struct gtp_frame_mem {
> + CORE_ADDR addr;
> + size_t size;
> +};
> +
> +struct gtp_frame_var {
> + unsigned int num;
> + uint64_t val;
> +};
> +
> +struct gtpro_entry {
> + struct gtpro_entry *next;
> + CORE_ADDR start;
> + CORE_ADDR end;
> +};
> +
> +static struct gtp_entry *gtp_list;
> +static struct gtp_entry *current_gtp;
> +static struct action *current_gtp_action;
> +static struct gtpsrc *current_gtp_src;
> +
> +static struct workqueue_struct *gtp_wq;
> +
> +static char gtp_read_ack;
> +static char *gtp_rw_buf;
> +static char *gtp_rw_bufp;
> +static size_t gtp_rw_size;
> +
> +static int gtp_start;
> +
> +static int gtp_disconnected_tracing;
> +static int gtp_circular;
> +
> +static DEFINE_SPINLOCK(gtp_var_lock);
> +static struct gtp_var *gtp_var_list;
> +static unsigned int gtp_var_head;
> +static unsigned int gtp_var_tail;
> +static struct gtp_var **gtp_var_array;
> +static struct gtp_var *current_gtp_var;
> +#define GTP_VAR_CURRENT_TASK_ID 1
> +static struct gtp_var gtp_var_current_task = {
> + .next = NULL,
> + .num = GTP_VAR_CURRENT_TASK_ID,
> + .src = "0:1:63757272656e745f7461736b",
> +};
> +#define GTP_VAR_CURRENT_THREAD_INFO_ID 2
> +static struct gtp_var gtp_var_current_thread_info = {
> + .next = >p_var_current_task,
> + .num = GTP_VAR_CURRENT_THREAD_INFO_ID,
> + .src = "0:1:63757272656e745f7468726561645f696e666f",
> +};
> +#define GTP_VAR_CLOCK_ID 3
> +static struct gtp_var gtp_var_clock = {
> + .next = >p_var_current_thread_info,
> + .num = GTP_VAR_CLOCK_ID,
> + .src = "0:1:636c6f636b",
> +};
> +#define GTP_VAR_CPU_ID 4
> +static struct gtp_var gtp_var_cpu_id = {
> + .next = >p_var_clock,
> + .num = GTP_VAR_CPU_ID,
> + .src = "0:1:6370755f6964",
> +};
> +#define GTP_VAR_PRINTK_TMP_ID 5
> +static struct gtp_var gtp_var_printk_tmp = {
> + .next = >p_var_cpu_id,
> + .num = GTP_VAR_PRINTK_TMP_ID,
> + .src = "0:1:7072696e746b5f746d70",
> +};
> +#define GTP_VAR_PRINTK_LEVEL_ID 6
> +static struct gtp_var gtp_var_printk_level = {
> + .next = >p_var_printk_tmp,
> + .num = GTP_VAR_PRINTK_LEVEL_ID,
> + .src = "8:1:7072696e746b5f6c6576656c",
> +};
> +#define GTP_VAR_PRINTK_FORMAT_ID 7
> +static struct gtp_var gtp_var_printk_format = {
> + .next = >p_var_printk_level,
> + .num = GTP_VAR_PRINTK_FORMAT_ID,
> + .src = "0:1:7072696e746b5f666f726d6174",
> +};
> +#define GTP_VAR_DUMP_STACK_ID 8
> +static struct gtp_var gtp_var_dump_stack = {
> + .next = >p_var_printk_format,
> + .num = GTP_VAR_DUMP_STACK_ID,
> + .src = "0:1:64756d705f737461636b",
> +};
> +#define GTP_VAR_LIST_FIRST (>p_var_dump_stack)
> +#define GTP_VAR_SPECIAL_MIN GTP_VAR_CURRENT_TASK_ID
> +#define GTP_VAR_SPECIAL_MAX GTP_VAR_DUMP_STACK_ID
> +#define GTP_VAR_IS_SPECIAL(x) ((x) >= GTP_VAR_SPECIAL_MIN \
> + && (x) <= GTP_VAR_SPECIAL_MAX)
> +#define GTP_VAR_NOT_GETV(x) ((x) == GTP_VAR_PRINTK_LEVEL_ID \
> + || (x) == GTP_VAR_PRINTK_FORMAT_ID)
> +#define GTP_VAR_NOT_SETV(x) (((x) >= GTP_VAR_CURRENT_TASK_ID \
> + && (x) <= GTP_VAR_CPU_ID) \
> + || (x) == GTP_VAR_DUMP_STACK_ID)
> +#define GTP_VAR_NOT_TRACEV(x) ((x) >= GTP_VAR_PRINTK_LEVEL_ID \
> + && (x) <= GTP_VAR_PRINTK_FORMAT_ID)
> +
> +static DEFINE_SPINLOCK(gtp_frame_lock);
> +static char *gtp_frame;
> +static char *gtp_frame_r_start;
> +static char *gtp_frame_w_start;
> +static char *gtp_frame_end;
> +static int gtp_frame_is_circular;
> +static char *gtp_frame_current;
> +static int gtp_frame_current_num;
> +static atomic_t gtp_frame_create;
> +static char *gtp_frame_file;
> +static size_t gtp_frame_file_size;
> +
> +static struct gtpro_entry *gtpro_list;
> +
> +#define GTP_PRINTF_MAX 256
> +static DEFINE_PER_CPU(char[GTP_PRINTF_MAX], gtp_printf);
> +
> +#ifdef CONFIG_X86
> +static ULONGEST
> +gtp_action_reg_read(struct pt_regs *regs, struct gtp_entry *tpe, int num)
> +{
> + ULONGEST ret;
> +
> + switch (num) {
> +#ifdef CONFIG_X86_32
> + case 0:
> + ret = regs->ax;
> + break;
> + case 1:
> + ret = regs->cx;
> + break;
> + case 2:
> + ret = regs->dx;
> + break;
> + case 3:
> + ret = regs->bx;
> + break;
> + case 4:
> + ret = (ULONGEST)(CORE_ADDR)®s->sp;
> + break;
> + case 5:
> + ret = regs->bp;
> + break;
> + case 6:
> + ret = regs->si;
> + break;
> + case 7:
> + ret = regs->di;
> + break;
> + case 8:
> + ret = regs->ip - 1;
> + break;
> + case 9:
> + ret = regs->flags;
> + break;
> + case 10:
> + ret = regs->cs;
> + break;
> + case 11:
> + ret = regs->ss;
> + break;
> + case 12:
> + ret = regs->ds;
> + break;
> + case 13:
> + ret = regs->es;
> + break;
> + case 14:
> + ret = regs->fs;
> + break;
> + case 15:
> + ret = regs->gs;
> + break;
> +#else
> + case 0:
> + ret = regs->ax;
> + break;
> + case 1:
> + ret = regs->bx;
> + break;
> + case 2:
> + ret = regs->cx;
> + break;
> + case 3:
> + ret = regs->dx;
> + break;
> + case 4:
> + ret = regs->si;
> + break;
> + case 5:
> + ret = regs->di;
> + break;
> + case 6:
> + ret = regs->bp;
> + break;
> + case 7:
> + ret = regs->sp;
> + break;
> + case 8:
> + ret = regs->r8;
> + break;
> + case 9:
> + ret = regs->r9;
> + break;
> + case 10:
> + ret = regs->r10;
> + break;
> + case 11:
> + ret = regs->r11;
> + break;
> + case 12:
> + ret = regs->r12;
> + break;
> + case 13:
> + ret = regs->r13;
> + break;
> + case 14:
> + ret = regs->r14;
> + break;
> + case 15:
> + ret = regs->r15;
> + break;
> + case 16:
> + ret = regs->ip - 1;
> + break;
> + case 17:
> + ret = regs->flags;
> + break;
> + case 18:
> + ret = regs->cs;
> + break;
> + case 19:
> + ret = regs->ss;
> + break;
> +#endif
> + default:
> + ret = 0;
> + tpe->reason = gtp_stop_access_wrong_reg;
> + break;
> + }
> +
> + return ret;
> +}
> +
> +static void
> +gtp_regs2ascii(struct pt_regs *regs, char *buf)
> +{
> +#ifdef CONFIG_X86_32
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_regs2ascii: ax = 0x%x\n",
> + (unsigned int) regs->ax);
> + printk(GTP_DEBUG "gtp_regs2ascii: cx = 0x%x\n",
> + (unsigned int) regs->cx);
> + printk(GTP_DEBUG "gtp_regs2ascii: dx = 0x%x\n",
> + (unsigned int) regs->dx);
> + printk(GTP_DEBUG "gtp_regs2ascii: bx = 0x%x\n",
> + (unsigned int) regs->bx);
> + printk(GTP_DEBUG "gtp_regs2ascii: sp = 0x%x\n",
> + (unsigned int) regs->sp);
> + printk(GTP_DEBUG "gtp_regs2ascii: bp = 0x%x\n",
> + (unsigned int) regs->bp);
> + printk(GTP_DEBUG "gtp_regs2ascii: si = 0x%x\n",
> + (unsigned int) regs->si);
> + printk(GTP_DEBUG "gtp_regs2ascii: di = 0x%x\n",
> + (unsigned int) regs->di);
> + printk(GTP_DEBUG "gtp_regs2ascii: ip = 0x%x\n",
> + (unsigned int) regs->ip);
> + printk(GTP_DEBUG "gtp_regs2ascii: flags = 0x%x\n",
> + (unsigned int) regs->flags);
> + printk(GTP_DEBUG "gtp_regs2ascii: cs = 0x%x\n",
> + (unsigned int) regs->cs);
> + printk(GTP_DEBUG "gtp_regs2ascii: ss = 0x%x\n",
> + (unsigned int) regs->ss);
> + printk(GTP_DEBUG "gtp_regs2ascii: ds = 0x%x\n",
> + (unsigned int) regs->ds);
> + printk(GTP_DEBUG "gtp_regs2ascii: es = 0x%x\n",
> + (unsigned int) regs->es);
> + printk(GTP_DEBUG "gtp_regs2ascii: fs = 0x%x\n",
> + (unsigned int) regs->fs);
> + printk(GTP_DEBUG "gtp_regs2ascii: gs = 0x%x\n",
> + (unsigned int) regs->gs);
> +#endif
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->ax));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->cx));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->dx));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->bx));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->sp));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->bp));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->si));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->di));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->ip));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->flags));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->cs));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->ss));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->ds));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->es));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->fs));
> + buf += 8;
> + sprintf(buf, "%08x", (unsigned int) swab32(regs->gs));
> + buf += 8;
> +#else
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_regs2ascii: ax = 0x%lx\n", regs->ax);
> + printk(GTP_DEBUG "gtp_regs2ascii: bx = 0x%lx\n", regs->bx);
> + printk(GTP_DEBUG "gtp_regs2ascii: cx = 0x%lx\n", regs->cx);
> + printk(GTP_DEBUG "gtp_regs2ascii: dx = 0x%lx\n", regs->dx);
> + printk(GTP_DEBUG "gtp_regs2ascii: si = 0x%lx\n", regs->si);
> + printk(GTP_DEBUG "gtp_regs2ascii: di = 0x%lx\n", regs->di);
> + printk(GTP_DEBUG "gtp_regs2ascii: bp = 0x%lx\n", regs->bp);
> + printk(GTP_DEBUG "gtp_regs2ascii: sp = 0x%lx\n", regs->sp);
> + printk(GTP_DEBUG "gtp_regs2ascii: r8 = 0x%lx\n", regs->r8);
> + printk(GTP_DEBUG "gtp_regs2ascii: r9 = 0x%lx\n", regs->r9);
> + printk(GTP_DEBUG "gtp_regs2ascii: r10 = 0x%lx\n", regs->r10);
> + printk(GTP_DEBUG "gtp_regs2ascii: r11 = 0x%lx\n", regs->r11);
> + printk(GTP_DEBUG "gtp_regs2ascii: r12 = 0x%lx\n", regs->r12);
> + printk(GTP_DEBUG "gtp_regs2ascii: r13 = 0x%lx\n", regs->r13);
> + printk(GTP_DEBUG "gtp_regs2ascii: r14 = 0x%lx\n", regs->r14);
> + printk(GTP_DEBUG "gtp_regs2ascii: r15 = 0x%lx\n", regs->r15);
> + printk(GTP_DEBUG "gtp_regs2ascii: ip = 0x%lx\n", regs->ip);
> + printk(GTP_DEBUG "gtp_regs2ascii: flags = 0x%lx\n", regs->flags);
> + printk(GTP_DEBUG "gtp_regs2ascii: cs = 0x%lx\n", regs->cs);
> + printk(GTP_DEBUG "gtp_regs2ascii: ss = 0x%lx\n", regs->ss);
> +#endif
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->ax));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->bx));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->cx));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->dx));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->si));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->di));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->bp));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->sp));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->r8));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->r9));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->r10));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->r11));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->r12));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->r13));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->r14));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->r15));
> + buf += 16;
> + sprintf(buf, "%016lx", (unsigned long) swab64(regs->ip));
> + buf += 16;
> + sprintf(buf, "%08x",
> + (unsigned int) swab32((unsigned int)regs->flags));
> + buf += 8;
> + sprintf(buf, "%08x",
> + (unsigned int) swab32((unsigned int)regs->cs));
> + buf += 8;
> + sprintf(buf, "%08x",
> + (unsigned int) swab32((unsigned int)regs->ss));
> + buf += 8;
> +#endif
> +}
> +
> +static void
> +gtp_regs2bin(struct pt_regs *regs, char *buf)
> +{
> +#ifdef CONFIG_X86_32
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_regs2ascii: ax = 0x%x\n",
> + (unsigned int) regs->ax);
> + printk(GTP_DEBUG "gtp_regs2ascii: cx = 0x%x\n",
> + (unsigned int) regs->cx);
> + printk(GTP_DEBUG "gtp_regs2ascii: dx = 0x%x\n",
> + (unsigned int) regs->dx);
> + printk(GTP_DEBUG "gtp_regs2ascii: bx = 0x%x\n",
> + (unsigned int) regs->bx);
> + printk(GTP_DEBUG "gtp_regs2ascii: sp = 0x%x\n",
> + (unsigned int) regs->sp);
> + printk(GTP_DEBUG "gtp_regs2ascii: bp = 0x%x\n",
> + (unsigned int) regs->bp);
> + printk(GTP_DEBUG "gtp_regs2ascii: si = 0x%x\n",
> + (unsigned int) regs->si);
> + printk(GTP_DEBUG "gtp_regs2ascii: di = 0x%x\n",
> + (unsigned int) regs->di);
> + printk(GTP_DEBUG "gtp_regs2ascii: ip = 0x%x\n",
> + (unsigned int) regs->ip);
> + printk(GTP_DEBUG "gtp_regs2ascii: flags = 0x%x\n",
> + (unsigned int) regs->flags);
> + printk(GTP_DEBUG "gtp_regs2ascii: cs = 0x%x\n",
> + (unsigned int) regs->cs);
> + printk(GTP_DEBUG "gtp_regs2ascii: ss = 0x%x\n",
> + (unsigned int) regs->ss);
> + printk(GTP_DEBUG "gtp_regs2ascii: ds = 0x%x\n",
> + (unsigned int) regs->ds);
> + printk(GTP_DEBUG "gtp_regs2ascii: es = 0x%x\n",
> + (unsigned int) regs->es);
> + printk(GTP_DEBUG "gtp_regs2ascii: fs = 0x%x\n",
> + (unsigned int) regs->fs);
> + printk(GTP_DEBUG "gtp_regs2ascii: gs = 0x%x\n",
> + (unsigned int) regs->gs);
> +#endif
> + memcpy(buf, ®s->ax, 4);
> + buf += 4;
> + memcpy(buf, ®s->cx, 4);
> + buf += 4;
> + memcpy(buf, ®s->dx, 4);
> + buf += 4;
> + memcpy(buf, ®s->bx, 4);
> + buf += 4;
> + memcpy(buf, ®s->sp, 4);
> + buf += 4;
> + memcpy(buf, ®s->bp, 4);
> + buf += 4;
> + memcpy(buf, ®s->si, 4);
> + buf += 4;
> + memcpy(buf, ®s->di, 4);
> + buf += 4;
> + memcpy(buf, ®s->ip, 4);
> + buf += 4;
> + memcpy(buf, ®s->flags, 4);
> + buf += 4;
> + memcpy(buf, ®s->cs, 4);
> + buf += 4;
> + memcpy(buf, ®s->ss, 4);
> + buf += 4;
> + memcpy(buf, ®s->ds, 4);
> + buf += 4;
> + memcpy(buf, ®s->es, 4);
> + buf += 4;
> + memcpy(buf, ®s->fs, 4);
> + buf += 4;
> + memcpy(buf, ®s->gs, 4);
> + buf += 4;
> +#else
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_regs2ascii: ax = 0x%lx\n", regs->ax);
> + printk(GTP_DEBUG "gtp_regs2ascii: bx = 0x%lx\n", regs->bx);
> + printk(GTP_DEBUG "gtp_regs2ascii: cx = 0x%lx\n", regs->cx);
> + printk(GTP_DEBUG "gtp_regs2ascii: dx = 0x%lx\n", regs->dx);
> + printk(GTP_DEBUG "gtp_regs2ascii: si = 0x%lx\n", regs->si);
> + printk(GTP_DEBUG "gtp_regs2ascii: di = 0x%lx\n", regs->di);
> + printk(GTP_DEBUG "gtp_regs2ascii: bp = 0x%lx\n", regs->bp);
> + printk(GTP_DEBUG "gtp_regs2ascii: sp = 0x%lx\n", regs->sp);
> + printk(GTP_DEBUG "gtp_regs2ascii: r8 = 0x%lx\n", regs->r8);
> + printk(GTP_DEBUG "gtp_regs2ascii: r9 = 0x%lx\n", regs->r9);
> + printk(GTP_DEBUG "gtp_regs2ascii: r10 = 0x%lx\n", regs->r10);
> + printk(GTP_DEBUG "gtp_regs2ascii: r11 = 0x%lx\n", regs->r11);
> + printk(GTP_DEBUG "gtp_regs2ascii: r12 = 0x%lx\n", regs->r12);
> + printk(GTP_DEBUG "gtp_regs2ascii: r13 = 0x%lx\n", regs->r13);
> + printk(GTP_DEBUG "gtp_regs2ascii: r14 = 0x%lx\n", regs->r14);
> + printk(GTP_DEBUG "gtp_regs2ascii: r15 = 0x%lx\n", regs->r15);
> + printk(GTP_DEBUG "gtp_regs2ascii: ip = 0x%lx\n", regs->ip);
> + printk(GTP_DEBUG "gtp_regs2ascii: flags = 0x%lx\n", regs->flags);
> + printk(GTP_DEBUG "gtp_regs2ascii: cs = 0x%lx\n", regs->cs);
> + printk(GTP_DEBUG "gtp_regs2ascii: ss = 0x%lx\n", regs->ss);
> +#endif
> + memcpy(buf, ®s->ax, 8);
> + buf += 8;
> + memcpy(buf, ®s->bx, 8);
> + buf += 8;
> + memcpy(buf, ®s->cx, 8);
> + buf += 8;
> + memcpy(buf, ®s->dx, 8);
> + buf += 8;
> + memcpy(buf, ®s->si, 8);
> + buf += 8;
> + memcpy(buf, ®s->di, 8);
> + buf += 8;
> + memcpy(buf, ®s->bp, 8);
> + buf += 8;
> + memcpy(buf, ®s->sp, 8);
> + buf += 8;
> + memcpy(buf, ®s->r8, 8);
> + buf += 8;
> + memcpy(buf, ®s->r9, 8);
> + buf += 8;
> + memcpy(buf, ®s->r10, 8);
> + buf += 8;
> + memcpy(buf, ®s->r11, 8);
> + buf += 8;
> + memcpy(buf, ®s->r12, 8);
> + buf += 8;
> + memcpy(buf, ®s->r13, 8);
> + buf += 8;
> + memcpy(buf, ®s->r14, 8);
> + buf += 8;
> + memcpy(buf, ®s->r15, 8);
> + buf += 8;
> + memcpy(buf, ®s->ip, 8);
> + buf += 8;
> + memcpy(buf, ®s->flags, 4);
> + buf += 4;
> + memcpy(buf, ®s->cs, 4);
> + buf += 4;
> + memcpy(buf, ®s->ss, 4);
> + buf += 4;
> +#endif
> +}
> +#endif
> +
> +#ifdef CONFIG_MIPS
> +static ULONGEST
> +gtp_action_reg_read(struct pt_regs *regs, struct gtp_entry *tpe, int num)
> +{
> + ULONGEST ret;
> +
> + if (num > 90) {
> + /* GDB convert the reg number to a GDB
> + [1 * gdbarch_num_regs .. 2 * gdbarch_num_regs) REGNUM
> + in function mips_dwarf_dwarf2_ecoff_reg_to_regnum. */
> + num -= 90;
> + }
> +
> + if (num >= 0 && num <= 31) {
> + ret = regs->regs[num];
> + } else {
> + switch (num) {
> + case 32:
> + ret = regs->cp0_status;
> + break;
> + case 33:
> + ret = regs->lo;
> + break;
> + case 34:
> + ret = regs->hi;
> + break;
> + case 35:
> + ret = regs->cp0_badvaddr;
> + break;
> + case 36:
> + ret = regs->cp0_cause;
> + break;
> + case 37:
> + ret = regs->cp0_epc;
> + break;
> + default:
> + ret = 0;
> + tpe->reason = gtp_stop_access_wrong_reg;
> + break;
> + }
> + }
> +
> + return ret;
> +};
> +
> +static void
> +gtp_regs2ascii(struct pt_regs *regs, char *buf)
> +{
> +#ifdef GTP_DEBUG
> + {
> + int i;
> +
> + for (i = 0; i < 32; i++)
> + printk(GTP_DEBUG "gtp_gdbrsp_g: r%d = 0x%lx\n", i,
> + regs->regs[i]);
> + }
> + printk(GTP_DEBUG "gtp_gdbrsp_g: status = 0x%lx\n",
> + regs->cp0_status);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: lo = 0x%lx\n", regs->lo);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: hi = 0x%lx\n", regs->hi);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: badvaddr = 0x%lx\n",
> + regs->cp0_badvaddr);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: cause = 0x%lx\n", regs->cp0_cause);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: pc = 0x%lx\n", regs->cp0_epc);
> +#endif
> +
> +#ifdef CONFIG_32BIT
> +#define OUTFORMAT "%08lx"
> +#define REGSIZE 8
> +#ifdef __LITTLE_ENDIAN
> +#define SWAB(a) swab32(a)
> +#else
> +#define SWAB(a) (a)
> +#endif
> +#else
> +#define OUTFORMAT "%016lx"
> +#define REGSIZE 16
> +#ifdef __LITTLE_ENDIAN
> +#define SWAB(a) swab64(a)
> +#else
> +#define SWAB(a) (a)
> +#endif
> +#endif
> + {
> + int i;
> +
> + for (i = 0; i < 32; i++) {
> + sprintf(buf, OUTFORMAT,
> + (unsigned long) SWAB(regs->regs[i]));
> + buf += REGSIZE;
> + }
> + }
> +
> + sprintf(buf, OUTFORMAT,
> + (unsigned long) SWAB(regs->cp0_status));
> + buf += REGSIZE;
> + sprintf(buf, OUTFORMAT,
> + (unsigned long) SWAB(regs->lo));
> + buf += REGSIZE;
> + sprintf(buf, OUTFORMAT,
> + (unsigned long) SWAB(regs->hi));
> + buf += REGSIZE;
> + sprintf(buf, OUTFORMAT,
> + (unsigned long) SWAB(regs->cp0_badvaddr));
> + buf += REGSIZE;
> + sprintf(buf, OUTFORMAT,
> + (unsigned long) SWAB(regs->cp0_cause));
> + buf += REGSIZE;
> + sprintf(buf, OUTFORMAT,
> + (unsigned long) SWAB(regs->cp0_epc));
> + buf += REGSIZE;
> +#undef OUTFORMAT
> +#undef REGSIZE
> +#undef SWAB
> +}
> +
> +static void
> +gtp_regs2bin(struct pt_regs *regs, char *buf)
> +{
> +#ifdef GTP_DEBUG
> + {
> + int i;
> +
> + for (i = 0; i < 32; i++)
> + printk(GTP_DEBUG "gtp_gdbrsp_g: r%d = 0x%lx\n", i,
> + regs->regs[i]);
> + }
> + printk(GTP_DEBUG "gtp_gdbrsp_g: status = 0x%lx\n",
> + regs->cp0_status);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: lo = 0x%lx\n", regs->lo);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: hi = 0x%lx\n", regs->hi);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: badvaddr = 0x%lx\n",
> + regs->cp0_badvaddr);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: cause = 0x%lx\n", regs->cp0_cause);
> + printk(GTP_DEBUG "gtp_gdbrsp_g: pc = 0x%lx\n", regs->cp0_epc);
> +#endif
> +
> +#ifdef CONFIG_32BIT
> +#define REGSIZE 4
> +#else
> +#define REGSIZE 8
> +#endif
> + {
> + int i;
> +
> + for (i = 0; i < 32; i++) {
> + memcpy(buf, ®s->regs[i], REGSIZE);
> + buf += REGSIZE;
> + }
> + }
> + memcpy(buf, ®s->cp0_status, REGSIZE);
> + buf += REGSIZE;
> + memcpy(buf, ®s->lo, REGSIZE);
> + buf += REGSIZE;
> + memcpy(buf, ®s->hi, REGSIZE);
> + buf += REGSIZE;
> + memcpy(buf, ®s->cp0_badvaddr, REGSIZE);
> + buf += REGSIZE;
> + memcpy(buf, ®s->cp0_cause, REGSIZE);
> + buf += REGSIZE;
> + memcpy(buf, ®s->cp0_epc, REGSIZE);
> + buf += REGSIZE;
> +#undef REGSIZE
> +}
> +#endif
> +
> +#ifdef CONFIG_ARM
> +static ULONGEST
> +gtp_action_reg_read(struct pt_regs *regs, struct gtp_entry *tpe, int num)
> +{
> + if (num >= 0 && num < 16)
> + return regs->uregs[num];
> + else if (num == 25)
> + return regs->uregs[16];
> +
> + tpe->reason = gtp_stop_access_wrong_reg;
> + return 0;
> +}
> +
> +static void
> +gtp_regs2ascii(struct pt_regs *regs, char *buf)
> +{
> +#ifdef __LITTLE_ENDIAN
> +#define SWAB(a) swab32(a)
> +#else
> +#define SWAB(a) (a)
> +#endif
> + int i;
> +
> + for (i = 0; i < 16; i++) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_g: r%d = 0x%lx\n",
> + i, regs->uregs[i]);
> +#endif
> + sprintf(buf, "%08lx", (unsigned long) SWAB(regs->uregs[i]));
> + buf += 8;
> + }
> +
> + /* f0-f7 fps */
> + memset(buf, '0', 200);
> + buf += 200;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_g: cpsr = 0x%lx\n", regs->uregs[16]);
> +#endif
> + sprintf(buf, "%08lx",
> + (unsigned long) SWAB(regs->uregs[16]));
> + buf += 8;
> +#undef SWAB
> +}
> +
> +static void
> +gtp_regs2bin(struct pt_regs *regs, char *buf)
> +{
> + int i;
> +
> + for (i = 0; i < 16; i++) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_g: r%d = 0x%lx\n",
> + i, regs->uregs[i]);
> +#endif
> + memcpy(buf, ®s->uregs[i], 4);
> + buf += 4;
> + }
> +
> + /* f0-f7 fps */
> + memset(buf, '\0', 100);
> + buf += 100;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_g: cpsr = 0x%lx\n", regs->uregs[16]);
> +#endif
> + memcpy(buf, ®s->uregs[16], 4);
> + buf += 4;
> +}
> +#endif
> +
> +static char *
> +gtp_frame_next(char *frame)
> +{
> + switch (FID(frame)) {
> + case FID_HEAD:
> + frame += FRAME_ALIGN(GTP_FRAME_HEAD_SIZE);
> + break;
> + case FID_REG:
> + frame += FRAME_ALIGN(GTP_FRAME_REG_SIZE);
> + break;
> + case FID_MEM: {
> + struct gtp_frame_mem *gfm;
> +
> + gfm = (struct gtp_frame_mem *) (frame + FID_SIZE
> + + sizeof(char *));
> + frame += FRAME_ALIGN(GTP_FRAME_MEM_SIZE + gfm->size);
> + }
> + break;
> + case FID_VAR:
> + frame += FRAME_ALIGN(GTP_FRAME_VAR_SIZE);
> + break;
> + case FID_END:
> + frame = gtp_frame;
> + break;
> + default:
> + return NULL;
> + break;
> + }
> +
> + return frame;
> +}
> +
> +#ifdef FRAME_ALLOC_RECORD
> +ULONGEST frame_alloc_size;
> +ULONGEST frame_alloc_size_hole;
> +#endif
> +
> +static char *
> +gtp_frame_alloc(size_t size)
> +{
> + char *ret = NULL;
> +
> +#ifdef FRAME_ALLOC_RECORD
> + frame_alloc_size += size;
> + frame_alloc_size_hole += (FRAME_ALIGN(size) - size);
> +#endif
> +
> + size = FRAME_ALIGN(size);
> +
> + if (size > GTP_FRAME_SIZE)
> + return NULL;
> +
> + spin_lock(>p_frame_lock);
> +
> + if (gtp_frame_w_start + size > gtp_frame_end) {
> + if (gtp_circular) {
> + gtp_frame_is_circular = 1;
> +#ifdef FRAME_ALLOC_RECORD
> + if (gtp_frame_w_start != gtp_frame_end
> + && gtp_frame_end - gtp_frame_w_start < FID_SIZE) {
> + printk(KERN_WARNING "Frame align wrong."
> + "start = %p end = %p\n",
> + gtp_frame_w_start, gtp_frame_end);
> + goto out;
> + }
> +#endif
> + if (gtp_frame_w_start != gtp_frame_end)
> + FID(gtp_frame_w_start) = FID_END;
> + gtp_frame_w_start = gtp_frame;
> + gtp_frame_r_start = gtp_frame;
> + } else
> + goto out;
> + }
> +
> + if (gtp_frame_is_circular) {
> + while (gtp_frame_w_start <= gtp_frame_r_start
> + && gtp_frame_w_start + size > gtp_frame_r_start) {
> + char *tmp = gtp_frame_next(gtp_frame_r_start);
> + if (tmp == NULL)
> + goto out;
> + gtp_frame_r_start = tmp;
> + }
> + }
> +
> + ret = gtp_frame_w_start;
> + gtp_frame_w_start += size;
> +
> +out:
> + spin_unlock(>p_frame_lock);
> + return ret;
> +}
> +
> +static char * *
> +gtp_action_head(struct gtp_entry *tpe)
> +{
> + char *tmp;
> + char **nextp;
> + ULONGEST *trace_nump;
> +
> + /* Get the head. */
> + tmp = gtp_frame_alloc(GTP_FRAME_HEAD_SIZE);
> + if (!tmp) {
> + tpe->reason = gtp_stop_frame_full;
> + return NULL;
> + }
> +
> + FID(tmp) = FID_HEAD;
> + tmp += FID_SIZE;
> +
> + nextp = (char **)tmp;
> + *nextp = NULL;
> + tmp += sizeof(char *);
> +
> + trace_nump = (ULONGEST *)tmp;
> + *trace_nump = tpe->num;
> +
> + return nextp;
> +}
> +
> +struct gtp_trace_s {
> + struct gtp_entry *tpe;
> + struct pt_regs *regs;
> + char **next;
> + int *run;
> + ULONGEST printk_tmp;
> + unsigned int printk_level;
> + unsigned int printk_format;
> + struct gtpsrc *printk_str;
> +};
> +
> +#define GTP_PRINTK_FORMAT_A 0
> +#define GTP_PRINTK_FORMAT_D 1
> +#define GTP_PRINTK_FORMAT_U 2
> +#define GTP_PRINTK_FORMAT_X 3
> +#define GTP_PRINTK_FORMAT_S 4
> +#define GTP_PRINTK_FORMAT_B 5
> +
> +static int
> +gtp_action_printk(struct gtp_trace_s *gts, ULONGEST addr, size_t size)
> +{
> + unsigned int printk_format = gts->printk_format;
> + char *pbuf = per_cpu(gtp_printf, smp_processor_id());
> +
> + if (gts->printk_str == NULL) {
> + gts->tpe->reason = gtp_stop_agent_expr_code_error;
> + printk(KERN_WARNING "gtp_action_printk: id:%d "
> + "printk doesn't have var name. Please "
> + "check actions of it.\n",
> + (int)gts->tpe->num);
> + return -1;
> + }
> +
> + if (size) {
> + if (size > GTP_PRINTF_MAX - 1)
> + size = GTP_PRINTF_MAX - 1;
> + if (gts->printk_format != GTP_PRINTK_FORMAT_S
> + && gts->printk_format != GTP_PRINTK_FORMAT_B
> + && size > 8)
> + size = 8;
> + if (probe_kernel_read(pbuf, (void *)(CORE_ADDR)addr, size)) {
> + gts->tpe->reason = gtp_stop_efault;
> + printk(KERN_WARNING "gtp_action_printk: id:%d "
> + "read %p %u get error.\n",
> + (int)gts->tpe->num, (void *)(CORE_ADDR)addr,
> + (unsigned int)size);
> + return -1;
> + }
> + } else {
> + size = sizeof(ULONGEST);
> + memcpy(pbuf, &addr, sizeof(ULONGEST));
> + }
> +
> + if (printk_format == GTP_PRINTK_FORMAT_A) {
> + if (size == 1 || size == 2 || size == 4 || size == 8)
> + printk_format = GTP_PRINTK_FORMAT_U;
> + else
> + printk_format = GTP_PRINTK_FORMAT_B;
> + }
> +
> + switch (printk_format) {
> + case GTP_PRINTK_FORMAT_D:
> + switch (size) {
> + case 1:
> + printk(KERN_NULL "<%d>%s%d\n", gts->printk_level,
> + gts->printk_str->src, pbuf[0]);
> + break;
> + case 2:
> + printk(KERN_NULL "<%d>%s%d\n", gts->printk_level,
> + gts->printk_str->src, (int)(*(short *)pbuf));
> + break;
> + case 4:
> + printk(KERN_NULL "<%d>%s%d\n", gts->printk_level,
> + gts->printk_str->src, *(int *)pbuf);
> + break;
> + case 8:
> + printk(KERN_NULL "<%d>%s%lld\n", gts->printk_level,
> + gts->printk_str->src, *(long long *)pbuf);
> + break;
> + default:
> + printk(KERN_WARNING "gtp_action_printk: id:%d "
> + "size %d cannot printk.\n",
> + (int)gts->tpe->num, (unsigned int)size);
> + gts->tpe->reason = gtp_stop_agent_expr_code_error;
> + return -1;
> + break;
> + }
> + break;
> + case GTP_PRINTK_FORMAT_U:
> + switch (size) {
> + case 1:
> + printk(KERN_NULL "<%d>%s%u\n", gts->printk_level,
> + gts->printk_str->src, pbuf[0]);
> + break;
> + case 2:
> + printk(KERN_NULL "<%d>%s%u\n", gts->printk_level,
> + gts->printk_str->src, (int)(*(short *)pbuf));
> + break;
> + case 4:
> + printk(KERN_NULL "<%d>%s%u\n", gts->printk_level,
> + gts->printk_str->src, *(int *)pbuf);
> + break;
> + case 8:
> + printk(KERN_NULL "<%d>%s%llu\n", gts->printk_level,
> + gts->printk_str->src, *(long long *)pbuf);
> + break;
> + default:
> + printk(KERN_WARNING "gtp_action_printk: id:%d "
> + "size %d cannot printk.\n",
> + (int)gts->tpe->num, (unsigned int)size);
> + gts->tpe->reason = gtp_stop_agent_expr_code_error;
> + return -1;
> + break;
> + }
> + break;
> + case GTP_PRINTK_FORMAT_X:
> + switch (size) {
> + case 1:
> + printk(KERN_NULL "<%d>%s0x%x\n", gts->printk_level,
> + gts->printk_str->src, pbuf[0]);
> + break;
> + case 2:
> + printk(KERN_NULL "<%d>%s0x%x\n", gts->printk_level,
> + gts->printk_str->src, (int)(*(short *)pbuf));
> + break;
> + case 4:
> + printk(KERN_NULL "<%d>%s0x%x\n", gts->printk_level,
> + gts->printk_str->src, *(int *)pbuf);
> + break;
> + case 8:
> + printk(KERN_NULL "<%d>%s0x%llx\n", gts->printk_level,
> + gts->printk_str->src, *(long long *)pbuf);
> + break;
> + default:
> + printk(KERN_WARNING "gtp_action_printk: id:%d "
> + "size %d cannot printk.\n",
> + (int)gts->tpe->num, (unsigned int)size);
> + gts->tpe->reason = gtp_stop_agent_expr_code_error;
> + return -1;
> + break;
> + }
> + break;
> + case GTP_PRINTK_FORMAT_S:
> + pbuf[GTP_PRINTF_MAX - 1] = '\0';
> + printk("<%d>%s%s\n", gts->printk_level, gts->printk_str->src,
> + pbuf);
> + break;
> + case GTP_PRINTK_FORMAT_B: {
> + size_t i;
> +
> + printk(KERN_NULL "<%d>%s", gts->printk_level,
> + gts->printk_str->src);
> + for (i = 0; i < size; i++)
> + printk("%02x", (unsigned int)pbuf[i]);
> + printk("\n");
> + }
> + break;
> + default:
> + printk(KERN_WARNING "gtp_action_printk: id:%d "
> + "printk format %u is not support.\n",
> + (int)gts->tpe->num, gts->printk_format);
> + gts->tpe->reason = gtp_stop_agent_expr_code_error;
> + return -1;
> + break;
> + }
> +
> + gts->printk_str = gts->printk_str->next;
> +
> + return 0;
> +}
> +
> +static int
> +gtp_action_memory_read(struct gtp_trace_s *gts, int reg, CORE_ADDR addr,
> + size_t size)
> +{
> + char *tmp;
> + struct gtp_frame_mem *fm;
> +
> + if (reg >= 0)
> + addr += (CORE_ADDR) gtp_action_reg_read(gts->regs,
> + gts->tpe, reg);
> + if (gts->tpe->reason != gtp_stop_normal)
> + return -1;
> +
> + if (gts->next == NULL) {
> + gts->next = gtp_action_head(gts->tpe);
> + if (!gts->next)
> + return -1;
> + }
> +
> + tmp = gtp_frame_alloc(GTP_FRAME_MEM_SIZE + size);
> + if (!tmp) {
> + gts->tpe->reason = gtp_stop_frame_full;
> + return -1;
> + }
> + *gts->next = tmp;
> +
> + FID(tmp) = FID_MEM;
> + tmp += FID_SIZE;
> +
> + gts->next = (char **)tmp;
> + *gts->next = NULL;
> + tmp += sizeof(char *);
> +
> + fm = (struct gtp_frame_mem *)tmp;
> + fm->addr = addr;
> + fm->size = size;
> + tmp += sizeof(struct gtp_frame_mem);
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_action_memory_read: id:%d %p %u\n",
> + (int)gts->tpe->num, (void *)addr, (unsigned int)size);
> +#endif
> +
> + if (probe_kernel_read(tmp, (void *)addr, size)) {
> + gts->tpe->reason = gtp_stop_efault;
> + memset(tmp, 0, size);
> + printk(KERN_WARNING "gtp_action_memory_read: id:%d read %p %u "
> + "get error.\n", (int)gts->tpe->num,
> + (void *)addr, (unsigned int)size);
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +gtp_action_r(struct gtp_trace_s *gts, struct action *ae)
> +{
> + struct pt_regs *regs;
> + char *tmp;
> +
> + if (gts->next == NULL) {
> + gts->next = gtp_action_head(gts->tpe);
> + if (!gts->next)
> + return -1;
> + }
> +
> + tmp = gtp_frame_alloc(GTP_FRAME_REG_SIZE);
> + if (!tmp) {
> + gts->tpe->reason = gtp_stop_frame_full;
> + return -1;
> + }
> + *gts->next = tmp;
> +
> + FID(tmp) = FID_REG;
> + tmp += FID_SIZE;
> +
> + gts->next = (char **)tmp;
> + *gts->next = NULL;
> + tmp += sizeof(char *);
> +
> + regs = (struct pt_regs *)tmp;
> +
> + memcpy(regs, gts->regs, sizeof(struct pt_regs));
> +#ifdef CONFIG_X86_32
> + regs->sp = (unsigned long)®s->sp;
> +#endif /* CONFIG_X86_32 */
> +#ifdef CONFIG_X86
> + regs->ip -= 1;
> +#endif /* CONFIG_X86 */
> +
> + return 0;
> +}
> +
> +static struct gtp_var *
> +gtp_gtp_var_array_find(unsigned int num)
> +{
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gtp_var_array_find: num:%u %u %u\n",
> + gtp_var_head, gtp_var_tail, num);
> +#endif
> +
> + if (num < gtp_var_head || num > gtp_var_tail)
> + return NULL;
> +
> + return gtp_var_array[num - gtp_var_head];
> +}
> +
> +uint64_t
> +gtp_get_var(struct gtp_trace_s *gts, struct gtp_var *tve)
> +{
> + switch (tve->num) {
> + case GTP_VAR_CURRENT_TASK_ID:
> + return (uint64_t)(CORE_ADDR)get_current();
> + break;
> + case GTP_VAR_CURRENT_THREAD_INFO_ID:
> + return (uint64_t)(CORE_ADDR)current_thread_info();
> + break;
> + case GTP_VAR_CLOCK_ID:
> + return (uint64_t)(CORE_ADDR)local_clock();
> + break;
> + case GTP_VAR_CPU_ID:
> + return (uint64_t)(CORE_ADDR)smp_processor_id();
> + break;
> + case GTP_VAR_PRINTK_TMP_ID:
> + return gts->printk_tmp;
> + break;
> + case GTP_VAR_DUMP_STACK_ID:
> + printk(KERN_NULL "gtp %d:", (int)gts->tpe->num);
> + dump_stack();
> + return 0;
> + break;
> + }
> +
> + return tve->val;
> +}
> +
> +static int
> +gtp_collect_var(struct gtp_trace_s *gts, struct gtp_var *tve)
> +{
> + struct gtp_frame_var *fvar;
> + char *tmp;
> +
> + if (gts->next == NULL) {
> + gts->next = gtp_action_head(gts->tpe);
> + if (!gts->next)
> + return -1;
> + }
> +
> + tmp = gtp_frame_alloc(GTP_FRAME_VAR_SIZE);
> + if (!tmp) {
> + gts->tpe->reason = gtp_stop_frame_full;
> + return -1;
> + }
> + *gts->next = tmp;
> +
> + FID(tmp) = FID_VAR;
> + tmp += FID_SIZE;
> +
> + gts->next = (char **)tmp;
> + *gts->next = NULL;
> + tmp += sizeof(char *);
> +
> + fvar = (struct gtp_frame_var *) tmp;
> + fvar->num = tve->num;
> + fvar->val = gtp_get_var(gts, tve);
> +
> + return 0;
> +}
> +
> +#define gtp_action_x_getv \
> + do { \
> + struct gtp_var *tve; \
> + \
> + tve = gtp_gtp_var_array_find(arg); \
> + if (!tve) \
> + goto code_error_out; \
> + \
> + stack[sp++] = top; \
> + \
> + top = gtp_get_var(gts, tve); \
> + } while (0)
> +
> +#define gtp_action_x_setv \
> + do { \
> + switch (arg) { \
> + case GTP_VAR_PRINTK_TMP_ID: \
> + gts->printk_tmp = top; \
> + break; \
> + case GTP_VAR_PRINTK_LEVEL_ID: \
> + gts->printk_level = (unsigned int)top; \
> + break; \
> + case GTP_VAR_PRINTK_FORMAT_ID: \
> + gts->printk_format = (unsigned int)top; \
> + break; \
> + default: { \
> + struct gtp_var *tve; \
> + \
> + tve = gtp_gtp_var_array_find(arg); \
> + if (!tve) \
> + goto code_error_out; \
> + /* Not check the other special \
> + trace state variables. \
> + Checked in gtp_check_x. */ \
> + tve->val = (uint64_t)top; \
> + } \
> + break; \
> + } \
> + } while (0)
> +
> +#define gtp_action_x_tracev \
> + do { \
> + if (gts->tpe->have_printk) \
> + pc += 2; \
> + else { \
> + struct gtp_var *tve; \
> + \
> + tve = gtp_gtp_var_array_find(arg); \
> + if (!tve) \
> + goto code_error_out; \
> + \
> + if (gtp_collect_var(gts, tve)) { \
> + /* gtp_collect_var will set error \
> + status with itself if it got \
> + error. */ \
> + goto out; \
> + } \
> + } \
> + } while (0)
> +
> +#define gtp_action_x_tracev_printk \
> + do { \
> + struct gtp_var *tve; \
> + \
> + tve = gtp_gtp_var_array_find(arg); \
> + if (!tve) \
> + goto code_error_out; \
> + \
> + if (gtp_action_printk(gts, gtp_get_var(gts, tve), 0)) { \
> + /* gtp_collect_var will set error status with \
> + itself if it got error. */ \
> + goto out; \
> + } \
> + } while (0)
> +
> +#define gtp_action_x_printf \
> + do { \
> + if (strstr((char *)(ebuf + pc), "%s")) { \
> + int i; \
> + char buf[50]; \
> + \
> + for (i = 0; i < 50; i++) { \
> + if (probe_kernel_read(buf + i, \
> + argv + i, 1)) \
> + goto code_error_out; \
> + if (!buf[i]) \
> + break; \
> + } \
> + snprintf(pbuf, psize, (char *)(ebuf + pc), \
> + buf); \
> + } else { \
> + snprintf(pbuf, psize, (char *)(ebuf + pc), \
> + argv); \
> + } \
> + } while (0)
> +
> +#define STACK_MAX 32
> +static DEFINE_PER_CPU(ULONGEST[STACK_MAX], action_x_stack);
> +
> +static int
> +gtp_action_x(struct gtp_trace_s *gts, struct action *ae)
> +{
> + int ret = 0;
> + unsigned int pc = 0, sp = 0;
> + ULONGEST top = 0;
> + int arg;
> + union {
> + union {
> + uint8_t bytes[1];
> + uint8_t val;
> + } u8;
> + union {
> + uint8_t bytes[2];
> + uint16_t val;
> + } u16;
> + union {
> + uint8_t bytes[4];
> + uint32_t val;
> + } u32;
> + union {
> + uint8_t bytes[8];
> + ULONGEST val;
> + } u64;
> + } cnv;
> + uint8_t *ebuf = ae->u.exp.buf;
> + int psize = GTP_PRINTF_MAX;
> + char *pbuf = per_cpu(gtp_printf, smp_processor_id());
> + ULONGEST *stack = per_cpu(action_x_stack, smp_processor_id());
> +
> + if (ae->u.exp.need_var_lock)
> + spin_lock(>p_var_lock);
> +
> + if (ae->type == 'X') {
> + while (pc < ae->u.exp.size) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_parse_x: cmd %x\n", ebuf[pc]);
> +#endif
> +
> + switch (ebuf[pc++]) {
> + /* add */
> + case 0x02:
> + top += stack[--sp];
> + break;
> + /* sub */
> + case 0x03:
> + top = stack[--sp] - top;
> + break;
> + /* mul */
> + case 0x04:
> + top *= stack[--sp];
> + break;
> +#ifndef CONFIG_MIPS
> + /* div_signed */
> + case 0x05:
> + if (top) {
> + LONGEST l = (LONGEST) stack[--sp];
> + do_div(l, (LONGEST) top);
> + top = l;
> + } else
> + goto code_error_out;
> + break;
> + /* div_unsigned */
> + case 0x06:
> + if (top) {
> + ULONGEST ul = stack[--sp];
> + do_div(ul, top);
> + top = ul;
> + } else
> + goto code_error_out;
> + break;
> + /* rem_signed */
> + case 0x07:
> + if (top) {
> + LONGEST l1 = (LONGEST) stack[--sp];
> + LONGEST l2 = (LONGEST) top;
> + top = do_div(l1, l2);
> + } else
> + goto code_error_out;
> + break;
> + /* rem_unsigned */
> + case 0x08:
> + if (top) {
> + ULONGEST ul1 = stack[--sp];
> + ULONGEST ul2 = top;
> + top = do_div(ul1, ul2);
> + } else
> + goto code_error_out;
> + break;
> +#endif
> + /* lsh */
> + case 0x09:
> + top = stack[--sp] << top;
> + break;
> + /* rsh_signed */
> + case 0x0a:
> + top = ((LONGEST) stack[--sp]) >> top;
> + break;
> + /* rsh_unsigned */
> + case 0x0b:
> + top = stack[--sp] >> top;
> + break;
> + /* trace */
> + case 0x0c:
> + --sp;
> + if (!gts->tpe->have_printk) {
> + if (gtp_action_memory_read
> + (gts, -1,
> + (CORE_ADDR) stack[sp],
> + (size_t) top))
> + goto out;
> + }
> + top = stack[--sp];
> + break;
> + /* trace_printk */
> + case 0xfd:
> + if (gtp_action_printk(gts,
> + (ULONGEST)stack[--sp],
> + (size_t) top))
> + goto out;
> + top = stack[--sp];
> + break;
> + /* trace_quick */
> + case 0x0d:
> + if (!gts->tpe->have_printk) {
> + if (gtp_action_memory_read
> + (gts, -1, (CORE_ADDR) top,
> + (size_t) ebuf[pc]))
> + goto out;
> + }
> + pc++;
> + break;
> + /* trace_quick_printk */
> + case 0xfe:
> + if (gtp_action_printk(gts, (ULONGEST) top,
> + (size_t) ebuf[pc++]))
> + goto out;
> + break;
> + /* log_not */
> + case 0x0e:
> + top = !top;
> + break;
> + /* bit_and */
> + case 0x0f:
> + top &= stack[--sp];
> + break;
> + /* bit_or */
> + case 0x10:
> + top |= stack[--sp];
> + break;
> + /* bit_xor */
> + case 0x11:
> + top ^= stack[--sp];
> + break;
> + /* bit_not */
> + case 0x12:
> + top = ~top;
> + break;
> + /* equal */
> + case 0x13:
> + top = (stack[--sp] == top);
> + break;
> + /* less_signed */
> + case 0x14:
> + top = (((LONGEST) stack[--sp])
> + < ((LONGEST) top));
> + break;
> + /* less_unsigned */
> + case 0x15:
> + top = (stack[--sp] < top);
> + break;
> + /* ext */
> + case 0x16:
> + arg = ebuf[pc++];
> + if (arg < (sizeof(LONGEST)*8)) {
> + LONGEST mask = 1 << (arg - 1);
> + top &= ((LONGEST) 1 << arg) - 1;
> + top = (top ^ mask) - mask;
> + }
> + break;
> + /* ref8 */
> + case 0x17:
> + if (probe_kernel_read
> + (cnv.u8.bytes,
> + (void *)(CORE_ADDR)top, 1))
> + goto code_error_out;
> + top = (ULONGEST) cnv.u8.val;
> + break;
> + /* ref16 */
> + case 0x18:
> + if (probe_kernel_read
> + (cnv.u16.bytes,
> + (void *)(CORE_ADDR)top, 2))
> + goto code_error_out;
> + top = (ULONGEST) cnv.u16.val;
> + break;
> + /* ref32 */
> + case 0x19:
> + if (probe_kernel_read
> + (cnv.u32.bytes,
> + (void *)(CORE_ADDR)top, 4))
> + goto code_error_out;
> + top = (ULONGEST) cnv.u32.val;
> + break;
> + /* ref64 */
> + case 0x1a:
> + if (probe_kernel_read
> + (cnv.u64.bytes,
> + (void *)(CORE_ADDR)top, 8))
> + goto code_error_out;
> + top = (ULONGEST) cnv.u64.val;
> + break;
> + /* if_goto */
> + case 0x20:
> + /* The not check sp code don't
> + support if_goto. */
> + goto code_error_out;
> + break;
> + /* goto */
> + case 0x21:
> + pc = (ebuf[pc] << 8) + (ebuf[pc + 1]);
> + break;
> + /* const8 */
> + case 0x22:
> + stack[sp++] = top;
> + top = ebuf[pc++];
> + break;
> + /* const16 */
> + case 0x23:
> + stack[sp++] = top;
> + top = ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + break;
> + /* const32 */
> + case 0x24:
> + stack[sp++] = top;
> + top = ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + break;
> + /* const64 */
> + case 0x25:
> + stack[sp++] = top;
> + top = ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + break;
> + /* reg */
> + case 0x26:
> + stack[sp++] = top;
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + top = gtp_action_reg_read(gts->regs, gts->tpe,
> + arg);
> + if (gts->tpe->reason != gtp_stop_normal)
> + goto error_out;
> + break;
> + /* end */
> + case 0x27:
> + if (gts->run)
> + *(gts->run) = (int)top;
> + goto out;
> + break;
> + /* dup */
> + case 0x28:
> + stack[sp++] = top;
> + break;
> + /* pop */
> + case 0x29:
> + top = stack[--sp];
> + break;
> + /* zero_ext */
> + case 0x2a:
> + arg = ebuf[pc++];
> + if (arg < (sizeof(LONGEST)*8))
> + top &= ((LONGEST) 1 << arg) - 1;
> + break;
> + /* swap */
> + case 0x2b:
> + stack[sp] = top;
> + top = stack[sp - 1];
> + stack[sp - 1] = stack[sp];
> + break;
> + /* getv */
> + case 0x2c:
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + gtp_action_x_getv;
> + break;
> + /* setv */
> + case 0x2d:
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + gtp_action_x_setv;
> + break;
> + /* tracev */
> + case 0x2e:
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + gtp_action_x_tracev;
> + break;
> + /* tracev_printk */
> + case 0xff:
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + gtp_action_x_tracev_printk;
> + break;
> + /* printf */
> + case 0x31: {
> + arg = ebuf[pc++];
> +
> + if (arg) {
> + void *argv = (void *)
> + (unsigned long)
> + top;
> +
> + /* pop */
> + top = stack[--sp];
> +
> + gtp_action_x_printf;
> + } else
> + snprintf(pbuf, psize,
> + (char *)(ebuf + pc));
> + psize -= strlen(pbuf);
> + pbuf += strlen(pbuf);
> +
> + pc += strlen((char *)ebuf + pc) + 1;
> + }
> + break;
> + }
> + }
> + } else {
> + /* The x execution code don't support printk so it doesn't have
> + printk ae support. */
> + while (pc < ae->u.exp.size) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_parse_x: cmd %x\n", ebuf[pc]);
> +#endif
> +
> + switch (ebuf[pc++]) {
> + /* add */
> + case 0x02:
> + if (sp)
> + top += stack[--sp];
> + else
> + goto code_error_out;
> + break;
> + /* sub */
> + case 0x03:
> + if (sp)
> + top = stack[--sp] - top;
> + else
> + goto code_error_out;
> + break;
> + /* mul */
> + case 0x04:
> + if (sp)
> + top *= stack[--sp];
> + else
> + goto code_error_out;
> + break;
> +#ifndef CONFIG_MIPS
> + /* div_signed */
> + case 0x05:
> + if (top && sp) {
> + LONGEST l = (LONGEST) stack[--sp];
> + do_div(l, (LONGEST) top);
> + top = l;
> + } else
> + goto code_error_out;
> + break;
> + /* div_unsigned */
> + case 0x06:
> + if (top && sp) {
> + ULONGEST ul = stack[--sp];
> + do_div(ul, top);
> + top = ul;
> + } else
> + goto code_error_out;
> + break;
> + /* rem_signed */
> + case 0x07:
> + if (top && sp) {
> + LONGEST l1 = (LONGEST) stack[--sp];
> + LONGEST l2 = (LONGEST) top;
> + top = do_div(l1, l2);
> + } else
> + goto code_error_out;
> + break;
> + /* rem_unsigned */
> + case 0x08:
> + if (top && sp) {
> + ULONGEST ul1 = stack[--sp];
> + ULONGEST ul2 = top;
> + top = do_div(ul1, ul2);
> + } else
> + goto code_error_out;
> + break;
> +#endif
> + /* lsh */
> + case 0x09:
> + if (sp)
> + top = stack[--sp] << top;
> + else
> + goto code_error_out;
> + break;
> + /* rsh_signed */
> + case 0x0a:
> + if (sp)
> + top = ((LONGEST) stack[--sp]) >> top;
> + else
> + goto code_error_out;
> + break;
> + /* rsh_unsigned */
> + case 0x0b:
> + if (sp)
> + top = stack[--sp] >> top;
> + else
> + goto code_error_out;
> + break;
> + /* trace */
> + case 0x0c:
> + if (sp > 1) {
> + if (gtp_action_memory_read
> + (gts, -1, (CORE_ADDR) stack[--sp],
> + (size_t) top)) {
> + /* gtp_action_memory_read will
> + set error status with itself
> + if it got error. */
> + goto out;
> + }
> + top = stack[--sp];
> + } else
> + goto code_error_out;
> + break;
> + /* trace_quick */
> + case 0x0d:
> + if (gtp_action_memory_read
> + (gts, -1, (CORE_ADDR) top,
> + (size_t) ebuf[pc++])) {
> + /* gtp_action_memory_read will set
> + error status with itself if it got
> + error. */
> + goto out;
> + }
> + break;
> + /* log_not */
> + case 0x0e:
> + top = !top;
> + break;
> + /* bit_and */
> + case 0x0f:
> + if (sp)
> + top &= stack[--sp];
> + else
> + goto code_error_out;
> + break;
> + /* bit_or */
> + case 0x10:
> + if (sp)
> + top |= stack[--sp];
> + else
> + goto code_error_out;
> + break;
> + /* bit_xor */
> + case 0x11:
> + if (sp)
> + top ^= stack[--sp];
> + else
> + goto code_error_out;
> + break;
> + /* bit_not */
> + case 0x12:
> + top = ~top;
> + break;
> + /* equal */
> + case 0x13:
> + if (sp)
> + top = (stack[--sp] == top);
> + else
> + goto code_error_out;
> + break;
> + /* less_signed */
> + case 0x14:
> + if (sp)
> + top = (((LONGEST) stack[--sp])
> + < ((LONGEST) top));
> + else
> + goto code_error_out;
> + break;
> + /* less_unsigned */
> + case 0x15:
> + if (sp)
> + top = (stack[--sp] < top);
> + else
> + goto code_error_out;
> + break;
> + /* ext */
> + case 0x16:
> + arg = ebuf[pc++];
> + if (arg < (sizeof(LONGEST)*8)) {
> + LONGEST mask = 1 << (arg - 1);
> + top &= ((LONGEST) 1 << arg) - 1;
> + top = (top ^ mask) - mask;
> + }
> + break;
> + /* ref8 */
> + case 0x17:
> + if (probe_kernel_read
> + (cnv.u8.bytes,
> + (void *)(CORE_ADDR)top, 1))
> + goto code_error_out;
> + top = (ULONGEST) cnv.u8.val;
> + break;
> + /* ref16 */
> + case 0x18:
> + if (probe_kernel_read
> + (cnv.u16.bytes,
> + (void *)(CORE_ADDR)top, 2))
> + goto code_error_out;
> + top = (ULONGEST) cnv.u16.val;
> + break;
> + /* ref32 */
> + case 0x19:
> + if (probe_kernel_read
> + (cnv.u32.bytes,
> + (void *)(CORE_ADDR)top, 4))
> + goto code_error_out;
> + top = (ULONGEST) cnv.u32.val;
> + break;
> + /* ref64 */
> + case 0x1a:
> + if (probe_kernel_read
> + (cnv.u64.bytes,
> + (void *)(CORE_ADDR)top, 8))
> + goto code_error_out;
> + top = (ULONGEST) cnv.u64.val;
> + break;
> + /* if_goto */
> + case 0x20:
> + if (top)
> + pc = (ebuf[pc] << 8)
> + + (ebuf[pc + 1]);
> + else
> + pc += 2;
> + /* pop */
> + if (sp)
> + top = stack[--sp];
> + else
> + goto code_error_out;
> + break;
> + /* goto */
> + case 0x21:
> + pc = (ebuf[pc] << 8) + (ebuf[pc + 1]);
> + break;
> + /* const8 */
> + case 0x22:
> + stack[sp++] = top;
> + top = ebuf[pc++];
> + break;
> + /* const16 */
> + case 0x23:
> + stack[sp++] = top;
> + top = ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + break;
> + /* const32 */
> + case 0x24:
> + stack[sp++] = top;
> + top = ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + break;
> + /* const64 */
> + case 0x25:
> + stack[sp++] = top;
> + top = ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + top = (top << 8) + ebuf[pc++];
> + break;
> + /* reg */
> + case 0x26:
> + stack[sp++] = top;
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + top = gtp_action_reg_read(gts->regs, gts->tpe,
> + arg);
> + if (gts->tpe->reason != gtp_stop_normal)
> + goto error_out;
> + break;
> + /* end */
> + case 0x27:
> + if (gts->run)
> + *(gts->run) = (int)top;
> + goto out;
> + break;
> + /* dup */
> + case 0x28:
> + stack[sp++] = top;
> + break;
> + /* pop */
> + case 0x29:
> + if (sp)
> + top = stack[--sp];
> + else
> + goto code_error_out;
> + break;
> + /* zero_ext */
> + case 0x2a:
> + arg = ebuf[pc++];
> + if (arg < (sizeof(LONGEST)*8))
> + top &= ((LONGEST) 1 << arg) - 1;
> + break;
> + /* swap */
> + case 0x2b:
> + if (sp) {
> + stack[sp] = top;
> + top = stack[sp - 1];
> + stack[sp - 1] = stack[sp];
> + } else
> + goto code_error_out;
> + break;
> + /* getv */
> + case 0x2c:
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + if (GTP_VAR_NOT_GETV(arg))
> + goto code_error_out;
> + gtp_action_x_getv;
> + break;
> + /* setv */
> + case 0x2d:
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + if (GTP_VAR_NOT_SETV(arg))
> + goto code_error_out;
> + gtp_action_x_setv;
> + break;
> + /* tracev */
> + case 0x2e:
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> + if (GTP_VAR_NOT_TRACEV(arg))
> + goto code_error_out;
> + gtp_action_x_tracev;
> + break;
> + /* printf */
> + case 0x31: {
> + arg = ebuf[pc++];
> +
> + if (arg) {
> + void *argv = (void *)
> + (unsigned long)
> + top;
> +
> + /* pop */
> + if (sp)
> + top = stack[--sp];
> + else
> + goto code_error_out;
> +
> + gtp_action_x_printf;
> + } else
> + snprintf(pbuf, psize,
> + (char *)(ebuf + pc));
> + psize -= strlen(pbuf);
> + pbuf += strlen(pbuf);
> +
> + pc += strlen((char *)ebuf + pc) + 1;
> + }
> + break;
> + }
> +
> + if (sp > STACK_MAX - 5) {
> + printk(KERN_WARNING "gtp_action_x: stack "
> + "overflow.\n");
> + gts->tpe->reason
> + = gtp_stop_agent_expr_stack_overflow;
> + goto error_out;
> + }
> + }
> + }
> +code_error_out:
> + gts->tpe->reason = gtp_stop_agent_expr_code_error;
> +error_out:
> + ret = -1;
> + printk(KERN_WARNING "gtp_action_x: tracepoint %d "
> + "action X get error in pc %u.\n",
> + (int)gts->tpe->num, pc);
> +out:
> + if (psize != GTP_PRINTF_MAX) {
> + unsigned long flags;
> +
> + local_irq_save(flags);
> + printk("%s", pbuf - (GTP_PRINTF_MAX - psize));
> + local_irq_restore(flags);
> + }
> + if (ae->u.exp.need_var_lock)
> + spin_unlock(>p_var_lock);
> + return ret;
> +}
> +
> +static int
> +gtp_kp_pre_handler(struct kprobe *p, struct pt_regs *regs)
> +{
> + struct gtp_trace_s gts;
> + struct action *ae;
> +
> + gts.tpe = container_of(p, struct gtp_entry, kp);
> + gts.regs = regs;
> + gts.next = NULL;
> + gts.printk_tmp = 0;
> + gts.printk_level = 8;
> + gts.printk_format = 0;
> + gts.printk_str = gts.tpe->printk_str;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_kp_pre_handler: tracepoint %d\n",
> + (int)gts.tpe->num);
> +#endif
> +
> + if (gts.tpe->kpreg == 0)
> + return 0;
> +
> + /* Condition. */
> + if (gts.tpe->cond) {
> + int run;
> +
> + gts.run = &run;
> + if (gtp_action_x(>s, gts.tpe->cond))
> + goto tpe_stop;
> + if (!run)
> + return 0;
> + }
> +
> + gts.run = NULL;
> +
> + /* Pass. */
> + if (!gts.tpe->nopass) {
> + if (atomic_dec_return(>s.tpe->current_pass) < 0)
> + goto tpe_stop;
> + }
> +
> + atomic_inc(>p_frame_create);
> +
> + /* Handle actions. */
> + for (ae = gts.tpe->action_list; ae; ae = ae->next) {
> + switch (ae->type) {
> + case 'R':
> + if (gtp_action_r(>s, ae))
> + goto tpe_stop;
> + break;
> + case 'X':
> + case 0xff:
> + if (gtp_action_x(>s, ae))
> + goto tpe_stop;
> + break;
> + case 'M':
> + if (gtp_action_memory_read(>s, ae->u.m.regnum,
> + ae->u.m.offset,
> + ae->u.m.size))
> + goto tpe_stop;
> + break;
> + }
> + }
> +
> + return 0;
> +
> +tpe_stop:
> + gts.tpe->kpreg = 0;
> + queue_work(gtp_wq, >s.tpe->work);
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_kp_pre_handler: tracepoint %d stop.\n",
> + (int)gts.tpe->num);
> +#endif
> + return 0;
> +}
> +
> +static struct action *
> +gtp_action_alloc(char *pkg)
> +{
> + struct action *ret;
> +
> + ret = kmalloc(sizeof(struct action), GFP_KERNEL);
> + if (!ret)
> + goto out;
> +
> + memset(ret, '\0', sizeof(struct action));
> + ret->type = pkg[0];
> + ret->src = pkg;
> +
> +out:
> + return ret;
> +}
> +
> +static void
> +gtp_action_release(struct action *ae)
> +{
> + struct action *ae2;
> +
> + while (ae) {
> + ae2 = ae;
> + ae = ae->next;
> + /* Release ae2. */
> + switch (ae2->type) {
> + case 'X':
> + kfree(ae2->u.exp.buf);
> + break;
> + }
> + kfree(ae2->src);
> + kfree(ae2);
> + }
> +}
> +
> +static void
> +gtp_src_release(struct gtpsrc *src)
> +{
> + struct gtpsrc *src2;
> +
> + while (src) {
> + src2 = src;
> + src = src->next;
> + kfree(src2->src);
> + kfree(src2);
> + }
> +}
> +
> +static void
> +gtp_stop(struct work_struct *work)
> +{
> + struct gtp_entry *tpe = container_of(work,
> + struct gtp_entry, work);
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_stop: tracepoint %d\n", (int)tpe->num);
> +#endif
> +
> + unregister_kprobe(&tpe->kp);
> +}
> +
> +static struct gtp_entry *
> +gtp_list_add(ULONGEST num, ULONGEST addr)
> +{
> + struct gtp_entry *ret = kmalloc(sizeof(struct gtp_entry),
> + GFP_KERNEL);
> +
> + if (!ret)
> + goto out;
> + memset(ret, '\0', sizeof(struct gtp_entry));
> + ret->num = num;
> + ret->addr = addr;
> + ret->kp.addr = (kprobe_opcode_t *) (CORE_ADDR)addr;
> + ret->kp.pre_handler = gtp_kp_pre_handler;
> + INIT_WORK(&ret->work, gtp_stop);
> + ret->have_printk = 0;
> +
> + /* Add to gtp_list. */
> + ret->next = gtp_list;
> + gtp_list = ret;
> +
> +out:
> + return ret;
> +}
> +
> +static struct gtp_entry *
> +gtp_list_find(ULONGEST num)
> +{
> + struct gtp_entry *tpe;
> +
> + for (tpe = gtp_list; tpe; tpe = tpe->next) {
> + if (tpe->num == num)
> + return tpe;
> + }
> +
> + return NULL;
> +}
> +
> +static void
> +gtp_list_release(void)
> +{
> + struct gtp_entry *tpe;
> +
> + while (gtp_list) {
> + tpe = gtp_list;
> + gtp_list = gtp_list->next;
> + gtp_action_release(tpe->cond);
> + gtp_action_release(tpe->action_list);
> + gtp_src_release(tpe->src);
> + kfree(tpe);
> + }
> +
> + current_gtp = NULL;
> + current_gtp_action = NULL;
> + current_gtp_src = NULL;
> +}
> +
> +static void
> +gtp_frame_reset(void)
> +{
> + gtp_frame_r_start = gtp_frame;
> + gtp_frame_w_start = gtp_frame;
> + gtp_frame_end = gtp_frame + GTP_FRAME_SIZE;
> + gtp_frame_is_circular = 0;
> + gtp_frame_current = NULL;
> + gtp_frame_current_num = 0;
> + atomic_set(>p_frame_create, 0);
> + if (gtp_frame_file) {
> + vfree(gtp_frame_file);
> + gtp_frame_file = NULL;
> + gtp_frame_file_size = 0;
> + }
> +}
> +
> +static int
> +hex2int(char hex, int *i)
> +{
> + if ((hex >= '0') && (hex <= '9')) {
> + *i = hex - '0';
> + return 1;
> + }
> + if ((hex >= 'a') && (hex <= 'f')) {
> + *i = hex - 'a' + 10;
> + return 1;
> + }
> + if ((hex >= 'A') && (hex <= 'F')) {
> + *i = hex - 'A' + 10;
> + return 1;
> + }
> +
> + return 0;
> +}
> +
> +static char *
> +hex2ulongest(char *pkg, ULONGEST *u64)
> +{
> + int i;
> +
> + *u64 = 0;
> + while (hex2int(pkg[0], &i)) {
> + pkg++;
> + *u64 = (*u64) << 4;
> + *u64 |= i & 0xf;
> + }
> +
> + return pkg;
> +}
> +
> +static char *
> +string2hex(char *pkg, char *out)
> +{
> + char *ret = out;
> +
> + while (pkg[0]) {
> + sprintf(out, "%x", pkg[0]);
> + pkg++;
> + out += 2;
> + }
> +
> + return ret;
> +}
> +
> +static char *
> +hex2string(char *pkg, char *out)
> +{
> + char *ret = out;
> + int i, j;
> +
> + while (hex2int(pkg[0], &i) && hex2int(pkg[1], &j)) {
> + out[0] = i * 16 + j;
> + pkg += 2;
> + out += 1;
> + }
> + out[0] = '\0';
> +
> + return ret;
> +}
> +
> +static char *
> +gtp_strdup(char *begin, char *end)
> +{
> + int len;
> + char *ret;
> +
> + if (end)
> + len = end - begin;
> + else
> + len = strlen(begin);
> +
> + ret = kmalloc(len + 1, GFP_KERNEL);
> + if (ret == NULL)
> + return NULL;
> +
> + strncpy(ret, begin, len);
> + ret[len] = '\0';
> +
> + return ret;
> +}
> +
> +static void
> +gtpro_list_clear(void)
> +{
> + struct gtpro_entry *e;
> +
> + while (gtpro_list) {
> + e = gtpro_list;
> + gtpro_list = gtpro_list->next;
> + kfree(e);
> + }
> +}
> +
> +static struct gtpro_entry *
> +gtpro_list_add(CORE_ADDR start, CORE_ADDR end)
> +{
> + struct gtpro_entry *e;
> +
> + e = kmalloc(sizeof(struct gtpro_entry), GFP_KERNEL);
> + if (e == NULL)
> + goto out;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtpro_list_add: %p %p\n", (void *)start, (void *)end);
> +#endif
> +
> + e->start = start;
> + e->end = end;
> +
> + e->next = gtpro_list;
> + gtpro_list = e;
> +
> +out:
> + return e;
> +}
> +
> +static struct gtp_var *
> +gtp_var_add(unsigned int num, uint64_t val, char *src)
> +{
> + struct gtp_var *var = kmalloc(sizeof(struct gtp_var), GFP_KERNEL);
> + if (!var)
> + goto out;
> +
> + var->num = num;
> + var->val = val;
> +
> + var->src = gtp_strdup(src, NULL);
> + if (var->src == NULL) {
> + kfree(var);
> + var = NULL;
> + goto out;
> + }
> +
> + var->next = gtp_var_list;
> + gtp_var_list = var;
> + gtp_var_head = min(var->num, gtp_var_head);
> + gtp_var_tail = max(var->num, gtp_var_tail);
> +
> +out:
> + return var;
> +}
> +
> +static struct gtp_var *
> +gtp_var_find(unsigned int num)
> +{
> + struct gtp_var *ret = NULL;
> +
> + if (num >= gtp_var_head && num <= gtp_var_tail) {
> + for (ret = gtp_var_list; ret; ret = ret->next) {
> + if (ret->num == num)
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> +static void
> +gtp_var_release(void)
> +{
> + struct gtp_var *tve;
> +
> + gtp_var_head = GTP_VAR_SPECIAL_MIN;
> + gtp_var_tail = GTP_VAR_SPECIAL_MAX;
> + current_gtp_var = NULL;
> +
> + while (gtp_var_list != GTP_VAR_LIST_FIRST) {
> + tve = gtp_var_list;
> + gtp_var_list = gtp_var_list->next;
> + kfree(tve->src);
> + kfree(tve);
> + }
> +}
> +
> +static int
> +gtp_gdbrsp_qtstop(void)
> +{
> + struct gtp_entry *tpe;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtstop\n");
> +#endif
> +
> +#ifdef FRAME_ALLOC_RECORD
> + printk(KERN_WARNING "frame_alloc_size = %llu, "
> + "frame_alloc_size_hole = %llu\n",
> + frame_alloc_size, frame_alloc_size_hole);
> + frame_alloc_size = 0;
> + frame_alloc_size_hole = 0;
> +#endif
> +
> + if (!gtp_start)
> + return -EBUSY;
> +
> + flush_workqueue(gtp_wq);
> +
> + for (tpe = gtp_list; tpe; tpe = tpe->next) {
> + if (tpe->kpreg) {
> + unregister_kprobe(&tpe->kp);
> + tpe->kpreg = 0;
> + }
> + }
> +
> + kfree(gtp_var_array);
> + gtp_var_array = NULL;
> +
> + gtp_start = 0;
> +
> + return 0;
> +}
> +
> +static int
> +gtp_gdbrsp_qtinit(void)
> +{
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtinit\n");
> +#endif
> +
> + if (gtp_start)
> + gtp_gdbrsp_qtstop();
> +
> + gtp_list_release();
> +
> + if (gtp_frame)
> + gtp_frame_reset();
> +
> + gtpro_list_clear();
> +
> + gtp_var_release();
> +
> + return 0;
> +}
> +
> +static int
> +gtp_gdbrsp_qtstart(void)
> +{
> + struct gtp_entry *tpe;
> + struct gtp_var *tve;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtstart\n");
> +#endif
> +
> + if (gtp_start)
> + return -EBUSY;
> +
> + /* Check the tracepoint that have printk. */
> + for (tpe = gtp_list; tpe; tpe = tpe->next) {
> + if (tpe->have_printk) {
> + struct action *ae, *prev_ae = NULL;
> + struct gtpsrc *src, *srctail = NULL;
> +
> +restart:
> + for (ae = tpe->action_list; ae;
> + prev_ae = ae, ae = ae->next) {
> + switch (ae->type) {
> + case 'R':
> + /* Remove it. */
> + if (prev_ae)
> + prev_ae->next = ae->next;
> + else
> + tpe->action_list = ae->next;
> + kfree(ae->src);
> + kfree(ae);
> + if (prev_ae)
> + ae = prev_ae;
> + else
> + goto restart;
> + break;
> + case 'M':
> + printk(KERN_WARNING "qtstart: action "
> + "of tp %d is not right. "
> + "Please put global variable to "
> + "trace state variable "
> + "$printk_tmp before print it.\n",
> + (int)tpe->num);
> + return -EINVAL;
> + break;
> + }
> + }
> +
> + for (src = tpe->src; src; src = src->next) {
> + int i;
> + char str[strlen(src->src) >> 1];
> + char *var = NULL;
> + ULONGEST num;
> + char tmp[20];
> + struct gtpsrc *ksrc;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtstart: action "
> + "%s\n", src->src);
> +#endif
> + /* Get the action in str. */
> + if (strncmp("cmd:0:", src->src,
> + strlen("cmd:0:")))
> + continue;
> + var = hex2ulongest(src->src + 6, &num);
> + if (var[0] == '\0')
> + return -EINVAL;
> + var++;
> + hex2string(var, str);
> + if (strlen(str) != num)
> + return -EINVAL;
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtstart: action "
> + "command %s\n", str);
> +#endif
> +
> + if (strncmp("collect ", str,
> + strlen("collect ")))
> + continue;
> + for (i = strlen("collect "); ; i++) {
> + if (str[i] != ' ') {
> + var = str + i;
> + break;
> + }
> + if (str[i] == '\0')
> + break;
> + }
> + if (!var) {
> + printk(KERN_WARNING "qtstart: cannot "
> + "get the var name "
> + "from tp %d "
> + "command %s.\n",
> + (int)tpe->num, str);
> + return -EINVAL;
> + }
> + if (strcmp(var, "$args") == 0
> + || strcmp(var, "$local") == 0) {
> + printk(KERN_WARNING "qtstart: cannot "
> + "print $args and "
> + "$local.\n");
> + return -EINVAL;
> + }
> + if (strcmp(var, "$reg") == 0)
> + continue;
> +
> + ksrc = kmalloc(sizeof(struct gtpsrc),
> + GFP_KERNEL);
> + if (ksrc == NULL)
> + return -ENOMEM;
> + ksrc->next = NULL;
> +
> + snprintf(tmp, 20, "gtp %d:", (int)tpe->num);
> + ksrc->src = kmalloc(strlen(tmp)
> + + strlen(var) + 2,
> + GFP_KERNEL);
> + if (ksrc->src == NULL) {
> + kfree(ksrc);
> + return -ENOMEM;
> + }
> + sprintf(ksrc->src, "%s%s=", tmp, var);
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtstart: new "
> + "printk var %s\n", ksrc->src);
> +#endif
> +
> + if (tpe->printk_str)
> + srctail->next = ksrc;
> + else
> + tpe->printk_str = ksrc;
> + srctail = ksrc;
> + }
> + }
> + }
> +
> + if (!gtp_frame) {
> + gtp_frame = vmalloc(GTP_FRAME_SIZE);
> + if (!gtp_frame)
> + return -ENOMEM;
> +
> + gtp_frame_reset();
> + }
> +
> + gtp_start = 1;
> +
> + gtp_var_array = kmalloc(sizeof(struct gtp_var *)
> + *(gtp_var_tail - gtp_var_head + 1),
> + GFP_KERNEL);
> + if (!gtp_var_array) {
> + gtp_gdbrsp_qtstop();
> + return -ENOMEM;
> + }
> + memset(gtp_var_array, '\0', sizeof(struct gtp_var *)
> + *(gtp_var_tail - gtp_var_head + 1));
> + for (tve = gtp_var_list; tve; tve = tve->next)
> + gtp_var_array[tve->num - gtp_var_head] = tve;
> +
> + for (tpe = gtp_list; tpe; tpe = tpe->next) {
> + if (!tpe->disable) {
> + int ret;
> +
> + if (!tpe->nopass)
> + atomic_set(&tpe->current_pass, tpe->pass);
> + ret = register_kprobe(&tpe->kp);
> + if (ret < 0) {
> + gtp_gdbrsp_qtstop();
> + return ret;
> + }
> + tpe->kpreg = 1;
> + }
> + tpe->reason = gtp_stop_normal;
> + }
> +
> + return 0;
> +}
> +
> +struct gtp_x_goto {
> + struct gtp_x_goto *next;
> + unsigned int addr;
> + int non_goto_done;
> +};
> +
> +static struct gtp_x_goto *
> +gtp_x_goto_find(struct gtp_x_goto *list, unsigned int pc)
> +{
> + struct gtp_x_goto *ret = NULL;
> +
> + for (ret = list; ret; ret = ret->next) {
> + if (ret->addr == pc)
> + break;
> + }
> +
> + return ret;
> +}
> +
> +static struct gtp_x_goto *
> +gtp_x_goto_add(struct gtp_x_goto **list, unsigned int pc, int
> non_goto_done)
> +{
> + struct gtp_x_goto *ret;
> +
> + ret = kmalloc(sizeof(struct gtp_x_goto), GFP_KERNEL);
> + if (!ret)
> + goto out;
> +
> + ret->addr = pc;
> + ret->non_goto_done = non_goto_done;
> +
> + if (*list) {
> + ret->next = *list;
> + *list = ret;
> + } else {
> + ret->next = NULL;
> + *list = ret;
> + }
> +
> +out:
> + return ret;
> +}
> +
> +struct gtp_x_var {
> + struct gtp_x_var *next;
> + unsigned int num;
> + unsigned int flags;
> +};
> +
> +static int
> +gtp_x_var_add(struct gtp_x_var **list, unsigned int num, unsigned int flag)
> +{
> + struct gtp_x_var *curv;
> +
> + for (curv = *list; curv; curv = curv->next) {
> + if (curv->num == num)
> + break;
> + }
> +
> + if (!curv) {
> + curv = kmalloc(sizeof(struct gtp_x_var), GFP_KERNEL);
> + if (!curv)
> + return -ENOMEM;
> + curv->num = num;
> + curv->flags = 0;
> + if (*list) {
> + curv->next = *list;
> + *list = curv;
> + } else {
> + curv->next = NULL;
> + *list = curv;
> + }
> + }
> +
> + curv->flags |= flag;
> +
> + return 0;
> +}
> +
> +static int
> +gtp_check_x(struct gtp_entry *tpe, struct action *ae)
> +{
> + int ret = -EINVAL;
> + unsigned int pc = 0, sp = 0;
> + struct gtp_x_goto *glist = NULL, *gtmp;
> + struct gtp_x_var *vlist = NULL, *vtmp;
> + uint8_t *ebuf = ae->u.exp.buf;
> + int last_trace_pc = -1;
> + unsigned int stack_size = 0;
> +
> +reswitch:
> + while (pc < ae->u.exp.size) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_check_x: cmd %x\n", ebuf[pc]);
> +#endif
> + switch (ebuf[pc++]) {
> + /* add */
> + case 0x02:
> + /* sub */
> + case 0x03:
> + /* mul */
> + case 0x04:
> + /* lsh */
> + case 0x09:
> + /* rsh_signed */
> + case 0x0a:
> + /* rsh_unsigned */
> + case 0x0b:
> + /* bit_and */
> + case 0x0f:
> + /* bit_or */
> + case 0x10:
> + /* bit_xor */
> + case 0x11:
> + /* equal */
> + case 0x13:
> + /* less_signed */
> + case 0x14:
> + /* less_unsigned */
> + case 0x15:
> + /* pop */
> + case 0x29:
> + /* swap */
> + case 0x2b:
> + if (ae->type == 'X') {
> + if (sp < 1) {
> + printk(KERN_WARNING "gtp_check_x: "
> + "stack overflow "
> + "in %d.\n",
> + pc - 1);
> + goto release_out;
> + } else
> + sp--;
> + }
> + break;
> +
> + /* trace */
> + case 0x0c:
> + if (tpe->have_printk)
> + last_trace_pc = pc - 1;
> +
> + if (ae->type == 'X') {
> + if (sp < 2) {
> + printk(KERN_WARNING "gtp_check_x: "
> + "stack overflow "
> + "in %d.\n",
> + pc - 1);
> + goto release_out;
> + } else
> + sp -= 2;
> + }
> + break;
> +
> + /* log_not */
> + case 0x0e:
> + /* bit_not */
> + case 0x12:
> + /* ref8 */
> + case 0x17:
> + /* ref16 */
> + case 0x18:
> + /* ref32 */
> + case 0x19:
> + /* ref64 */
> + case 0x1a:
> + break;
> +
> + /* dup */
> + case 0x28:
> + if (ae->type == 'X') {
> + sp++;
> + if (stack_size < sp)
> + stack_size = sp;
> + }
> + break;
> +
> + /* const8 */
> + case 0x22:
> + if (ae->type == 'X') {
> + sp++;
> + if (stack_size < sp)
> + stack_size = sp;
> + }
> + /* ext */
> + case 0x16:
> + /* zero_ext */
> + case 0x2a:
> + if (pc >= ae->u.exp.size)
> + goto release_out;
> + pc++;
> + break;
> +
> + /* trace_quick */
> + case 0x0d:
> + if (tpe->have_printk)
> + last_trace_pc = pc - 1;
> +
> + if (pc >= ae->u.exp.size)
> + goto release_out;
> + pc++;
> + break;
> +
> + /* const16 */
> + case 0x23:
> + /* reg */
> + case 0x26:
> + if (pc + 1 >= ae->u.exp.size)
> + goto release_out;
> + pc += 2;
> + if (ae->type == 'X') {
> + sp++;
> + if (stack_size < sp)
> + stack_size = sp;
> + }
> + break;
> +
> + /* const32 */
> + case 0x24:
> + if (pc + 3 >= ae->u.exp.size)
> + goto release_out;
> + pc += 4;
> + if (ae->type == 'X') {
> + sp++;
> + if (stack_size < sp)
> + stack_size = sp;
> + }
> + break;
> +
> + /* const64 */
> + case 0x25:
> + if (pc + 7 >= ae->u.exp.size)
> + goto release_out;
> + pc += 8;
> + if (ae->type == 'X') {
> + sp++;
> + if (stack_size < sp)
> + stack_size = sp;
> + }
> + break;
> +
> + /* if_goto */
> + case 0x20:
> + if (tpe->have_printk)
> + goto release_out;
> +
> + if (pc + 1 >= ae->u.exp.size)
> + goto release_out;
> + gtmp = gtp_x_goto_find(glist, pc);
> + if (gtmp) {
> + if (gtmp->non_goto_done)
> + goto out;
> + else {
> + gtmp->non_goto_done = 1;
> + pc += 2;
> + }
> + } else {
> + if (!gtp_x_goto_add(&glist, pc, 0)) {
> + ret = -ENOMEM;
> + goto release_out;
> + }
> + pc = (ebuf[pc] << 8)
> + + (ebuf[pc + 1]);
> + }
> + /* Mark this action X need sp check when it exec. */
> + ae->type = 0xff;
> + break;
> +
> + /* goto */
> + case 0x21:
> + if (pc + 1 >= ae->u.exp.size)
> + goto release_out;
> + gtmp = gtp_x_goto_find(glist, pc);
> + if (gtmp)
> + goto out;
> + else {
> + if (!gtp_x_goto_add(&glist, pc, 1)) {
> + ret = -ENOMEM;
> + goto release_out;
> + }
> + pc = (ebuf[pc] << 8) + (ebuf[pc + 1]);
> + }
> + break;
> +
> + /* end */
> + case 0x27:
> + goto out;
> + break;
> +
> + /* getv */
> + case 0x2c: {
> + int arg;
> +
> + if (pc + 1 >= ae->u.exp.size)
> + goto release_out;
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> +
> + if (GTP_VAR_NOT_GETV(arg)) {
> + printk(KERN_WARNING
> + "gtp_check_x: The tv %d cannot "
> + "get.\n", arg);
> + goto release_out;
> + }
> +
> + if (!GTP_VAR_IS_SPECIAL(arg)) {
> + if (gtp_x_var_add(&vlist, arg, 1)) {
> + ret = -ENOMEM;
> + goto release_out;
> + }
> + }
> + }
> + if (ae->type == 'X') {
> + sp++;
> + if (stack_size < sp)
> + stack_size = sp;
> + }
> + break;
> +
> + /* setv */
> + case 0x2d: {
> + int arg;
> +
> + if (pc + 1 >= ae->u.exp.size)
> + goto release_out;
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> +
> + if (GTP_VAR_NOT_SETV(arg)) {
> + printk(KERN_WARNING
> + "gtp_check_x: The tv %d cannot "
> + "set.\n", arg);
> + goto release_out;
> + }
> +
> + if (arg == GTP_VAR_PRINTK_LEVEL_ID)
> + tpe->have_printk = 1;
> +
> + if (!GTP_VAR_IS_SPECIAL(arg)) {
> + if (gtp_x_var_add(&vlist, arg, 2)) {
> + ret = -ENOMEM;
> + goto release_out;
> + }
> + }
> + }
> + break;
> +
> + /* tracev */
> + case 0x2e: {
> + int arg;
> +
> + if (tpe->have_printk)
> + last_trace_pc = pc - 1;
> +
> + if (pc + 1 >= ae->u.exp.size)
> + goto release_out;
> + arg = ebuf[pc++];
> + arg = (arg << 8) + ebuf[pc++];
> +
> + if (GTP_VAR_NOT_TRACEV(arg)) {
> + printk(KERN_WARNING
> + "gtp_check_x: The tv %d cannot "
> + "trace.\n", arg);
> + goto release_out;
> + }
> +
> + if (!GTP_VAR_IS_SPECIAL(arg)) {
> + if (gtp_x_var_add(&vlist, arg, 4)) {
> + ret = -ENOMEM;
> + goto release_out;
> + }
> + }
> + }
> + break;
> +
> + /* printf */
> + case 0x31: {
> + int arg = ebuf[pc++];
> + if (arg && ae->type == 'X') {
> + if (sp < 1) {
> + printk(KERN_WARNING
> + "gtp_check_x: stack "
> + "overflow in %d.\n",
> + pc - 2);
> + goto release_out;
> + } else
> + sp--;
> + }
> + pc += strlen((char *)ebuf + pc) + 1;
> + }
> + break;
> +
> + /* div_signed */
> + case 0x05:
> + /* div_unsigned */
> + case 0x06:
> + /* rem_signed */
> + case 0x07:
> + /* rem_unsigned */
> + case 0x08:
> +#ifdef CONFIG_MIPS
> + /* XXX, mips don't have 64 bit div. */
> + goto release_out;
> +#endif
> + if (ae->type == 'X') {
> + if (sp < 1) {
> + printk(KERN_WARNING "gtp_check_x: "
> + "stack overflow "
> + "in %d.\n",
> + pc - 1);
> + goto release_out;
> + } else
> + sp--;
> + }
> + break;
> +
> + /* float */
> + case 0x01:
> + /* ref_float */
> + case 0x1b:
> + /* ref_double */
> + case 0x1c:
> + /* ref_long_double */
> + case 0x1d:
> + /* l_to_d */
> + case 0x1e:
> + /* d_to_l */
> + case 0x1f:
> + /* trace16 */
> + case 0x30:
> + default:
> + goto release_out;
> + break;
> + }
> + }
> + goto release_out;
> +
> +out:
> + for (gtmp = glist; gtmp; gtmp = gtmp->next) {
> + if (!gtmp->non_goto_done)
> + break;
> + }
> + if (gtmp) {
> + pc = gtmp->addr + 2;
> + gtmp->non_goto_done = 1;
> + goto reswitch;
> + }
> + if (stack_size >= STACK_MAX) {
> + printk(KERN_WARNING "gtp_check_x: stack overflow.");
> + goto release_out;
> + }
> + ret = 0;
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_check_x: Code is OK. sp_checked is %d. "
> + "stack_size is %d.\n",
> + (ae->type == 'X'), stack_size);
> +#endif
> +
> +release_out:
> + while (glist) {
> + gtmp = glist;
> + glist = glist->next;
> + kfree(gtmp);
> + }
> + while (vlist) {
> + vtmp = vlist;
> + vlist = vlist->next;
> + if ((vtmp->flags & 2)
> + && ((vtmp->flags & 1) || (vtmp->flags & 4)))
> + ae->u.exp.need_var_lock = 1;
> + kfree(vtmp);
> + }
> +
> + if (tpe->have_printk && last_trace_pc > -1) {
> + /* Set the last trace code to printk code. */
> + switch (ebuf[last_trace_pc]) {
> + /* trace */
> + case 0x0c:
> + ebuf[last_trace_pc] = 0xfd;
> + break;
> + /* trace_quick */
> + case 0x0d:
> + ebuf[last_trace_pc] = 0xfe;
> + break;
> + /* tracev */
> + case 0x2e:
> + ebuf[last_trace_pc] = 0xff;
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> +static int
> +gtp_parse_x(struct gtp_entry *tpe, struct action *ae, char **pkgp)
> +{
> + ULONGEST size;
> + int ret = 0, i, h, l;
> + char *pkg = *pkgp;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_parse_x: %s\n", pkg);
> +#endif
> +
> + if (pkg[0] == '\0') {
> + ret = -EINVAL;
> + goto out;
> + }
> + pkg = hex2ulongest(pkg, &size);
> + if (pkg[0] != ',') {
> + ret = -EINVAL;
> + goto out;
> + }
> + ae->u.exp.size = (unsigned int)size;
> + pkg++;
> +
> + ae->u.exp.buf = kmalloc(ae->u.exp.size, GFP_KERNEL);
> + if (!ae->u.exp.buf)
> + return -ENOMEM;
> +
> + for (i = 0; i < ae->u.exp.size
> + && hex2int(pkg[0], &h) && hex2int(pkg[1], &l);
> + i++) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_parse_x: %s %d %d\n", pkg, h, l);
> +#endif
> + ae->u.exp.buf[i] = (h << 4) | l;
> + pkg += 2;
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_parse_x: %x\n", ae->u.exp.buf[i]);
> +#endif
> + }
> + if (i != ae->u.exp.size) {
> + kfree(ae->u.exp.buf);
> + ret = -EINVAL;
> + goto out;
> + }
> +
> + ae->u.exp.need_var_lock = 0;
> +
> + ret = gtp_check_x(tpe, ae);
> + if (ret < 0)
> + kfree(ae->u.exp.buf);
> +
> +out:
> + *pkgp = pkg;
> + return ret;
> +}
> +
> +static int
> +gtp_gdbrsp_qtdp(char *pkg)
> +{
> + int addnew = 1;
> + ULONGEST num, addr;
> + struct gtp_entry *tpe;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtdp: %s\n", pkg);
> +#endif
> +
> + if (gtp_start)
> + return -EBUSY;
> +
> + if (pkg[0] == '-') {
> + pkg++;
> + addnew = 0;
> + }
> +
> + /* Get num and addr. */
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg = hex2ulongest(pkg, &num);
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg++;
> + pkg = hex2ulongest(pkg, &addr);
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg++;
> +
> + tpe = gtp_list_find(num);
> + if (addnew) {
> + if (tpe)
> + return -EINVAL;
> +
> + tpe = gtp_list_add(num, addr);
> + if (tpe == NULL)
> + return -ENOMEM;
> +
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + if (pkg[0] == 'D')
> + tpe->disable = 1;
> + pkg++;
> +
> + /* Get step and pass. */
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg++;
> + pkg = hex2ulongest(pkg, &tpe->step);
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg++;
> + pkg = hex2ulongest(pkg, &tpe->pass);
> + if (tpe->pass == 0)
> + tpe->nopass = 1;
> + }
> +
> + if (tpe) {
> + /* Add action to tpe. */
> + int step_action = 0;
> +
> + if (pkg[0] == 'S') {
> + pkg++;
> + step_action = 1;
> + /* XXX: Still not support step. */
> + return 1;
> + }
> + while (pkg[0]) {
> + struct action *ae = NULL, *atail = NULL;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtdp: %s\n", pkg);
> +#endif
> + switch (pkg[0]) {
> + case ':':
> + pkg++;
> + break;
> + case 'M': {
> + int is_neg = 0;
> + ULONGEST ulongtmp;
> +
> + ae = gtp_action_alloc(pkg);
> + if (!ae)
> + return -ENOMEM;
> + pkg++;
> + if (pkg[0] == '-') {
> + is_neg = 1;
> + pkg++;
> + }
> + pkg = hex2ulongest(pkg, &ulongtmp);
> + ae->u.m.regnum = (int)ulongtmp;
> + if (is_neg)
> + ae->u.m.regnum
> + = -ae->u.m.regnum;
> + if (pkg[0] == '\0') {
> + kfree(ae);
> + return -EINVAL;
> + }
> + pkg++;
> + pkg = hex2ulongest(pkg, &ulongtmp);
> + ae->u.m.offset = (CORE_ADDR)ulongtmp;
> + if (pkg[0] == '\0') {
> + kfree(ae);
> + return -EINVAL;
> + }
> + pkg++;
> + pkg = hex2ulongest(pkg, &ulongtmp);
> + ae->u.m.size = (size_t)ulongtmp;
> + }
> + break;
> + case 'R':
> + /* XXX: reg_mask is ignore. */
> + ae = gtp_action_alloc(pkg);
> + if (!ae)
> + return -ENOMEM;
> + pkg++;
> + pkg = hex2ulongest(pkg,
> + &ae->u.reg_mask);
> + break;
> + case 'X': {
> + int ret;
> +
> + ae = gtp_action_alloc(pkg);
> + if (!ae)
> + return -ENOMEM;
> + pkg++;
> + ret = gtp_parse_x(tpe, ae, &pkg);
> + if (ret < 0) {
> + kfree(ae);
> + return ret;
> + }
> +#ifdef GTP_DEBUG
> + if (ae && ae->u.exp.need_var_lock)
> + printk(GTP_DEBUG
> + "gtp_gdbrsp_qtdp: "
> + "ae need var lock.\n");
> +#endif
> + }
> + break;
> + case '-':
> + pkg++;
> + break;
> + default:
> + /* XXX: Not support. */
> + return 1;
> + }
> +
> + if (ae) {
> + /* Save the src. */
> + ae->src = gtp_strdup(ae->src, pkg);
> + if (ae->src == NULL) {
> + kfree(ae);
> + return -ENOMEM;
> + }
> + /* Add ae to tpe. */
> + if (ae->type == 'X' && addnew && !tpe->cond) {
> + tpe->cond = ae;
> + tpe->cond->next = NULL;
> + } else if (!tpe->action_list) {
> + tpe->action_list = ae;
> + atail = ae;
> + } else {
> + if (atail == NULL)
> + for (atail = tpe->action_list;
> + atail->next;
> + atail = atail->next)
> + ;
> + atail->next = ae;
> + atail = ae;
> + }
> + }
> + }
> + } else
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> +static int
> +gtp_gdbrsp_qtdpsrc(char *pkg)
> +{
> + ULONGEST num, addr;
> + struct gtpsrc *src, *srctail;
> + struct gtp_entry *tpe;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtdpsrc: %s\n", pkg);
> +#endif
> +
> + if (gtp_start)
> + return -EBUSY;
> +
> + /* Get num and addr. */
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg = hex2ulongest(pkg, &num);
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg++;
> + pkg = hex2ulongest(pkg, &addr);
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg++;
> + tpe = gtp_list_find(num);
> + if (tpe == NULL)
> + return -EINVAL;
> +
> + src = kmalloc(sizeof(struct gtpsrc), GFP_KERNEL);
> + if (src == NULL)
> + return -ENOMEM;
> + src->next = NULL;
> + src->src = gtp_strdup(pkg, NULL);
> + if (src->src == NULL) {
> + kfree(src);
> + return -ENOMEM;
> + }
> +
> + if (tpe->src) {
> + for (srctail = tpe->src; srctail->next;
> + srctail = srctail->next)
> + ;
> + srctail->next = src;
> + } else
> + tpe->src = src;
> +
> + return 0;
> +}
> +
> +static int
> +gtp_gdbrsp_qtdisconnected(char *pkg)
> +{
> + ULONGEST setting;
> +
> + if (pkg[0] == '\0')
> + return -EINVAL;
> +
> + hex2ulongest(pkg, &setting);
> + gtp_disconnected_tracing = (int)setting;
> +
> + return 0;
> +}
> +
> +static int
> +gtp_gdbrsp_qtbuffer(char *pkg)
> +{
> + if (strncmp("circular:", pkg, 9) == 0) {
> + ULONGEST setting;
> +
> + pkg += 9;
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + hex2ulongest(pkg, &setting);
> + gtp_circular = (int)setting;
> +
> + return 0;
> + }
> +
> + return 1;
> +}
> +
> +static int
> +gtp_frame_head_find_addr(char *cur, int inside, unsigned long lo,
> + unsigned long hi)
> +{
> + char *tmp;
> + int tfnum = gtp_frame_current_num;
> +
> + if (cur)
> + tmp = cur;
> + else
> + tmp = gtp_frame_r_start;
> +
> + do {
> + if (FID(tmp) == FID_HEAD) {
> + if (tfnum != gtp_frame_current_num) {
> + char *next;
> + struct pt_regs *regs = NULL;
> +
> + for (next = *(char **)(tmp + FID_SIZE); next;
> + next = *(char **)(next + FID_SIZE)) {
> + if (FID(next) == FID_REG) {
> + regs = (struct pt_regs *)
> + (next + FID_SIZE
> + + sizeof(char *));
> + break;
> + }
> + }
> + if (regs
> + && ((inside
> + && GTP_REGS_PC(regs) >= lo
> + && GTP_REGS_PC(regs) <= hi)
> + || (!inside
> + && (GTP_REGS_PC(regs) < lo
> + || GTP_REGS_PC(regs) > hi)))) {
> + gtp_frame_current_num = tfnum;
> + gtp_frame_current = tmp;
> + return 0;
> + }
> + }
> + tfnum++;
> + }
> +
> + tmp = gtp_frame_next(tmp);
> + if (!tmp)
> + break;
> +
> + if (tmp == gtp_frame_end)
> + tmp = gtp_frame;
> + } while (tmp != gtp_frame_w_start);
> +
> + return -1;
> +}
> +
> +static int
> +gtp_frame_head_find_trace(char *cur, ULONGEST trace)
> +{
> + char *tmp;
> + int tfnum = gtp_frame_current_num;
> +
> + if (cur)
> + tmp = cur;
> + else
> + tmp = gtp_frame_r_start;
> +
> + do {
> + if (FID(tmp) == FID_HEAD) {
> + if (tfnum != gtp_frame_current_num) {
> + if (trace == *(ULONGEST *) (tmp + FID_SIZE
> + + sizeof(char *))) {
> + gtp_frame_current_num = tfnum;
> + gtp_frame_current = tmp;
> + return 0;
> + }
> + }
> + tfnum++;
> + }
> +
> + tmp = gtp_frame_next(tmp);
> + if (!tmp)
> + break;
> +
> + if (tmp == gtp_frame_end)
> + tmp = gtp_frame;
> + } while (tmp != gtp_frame_w_start);
> +
> + return -1;
> +}
> +
> +static int
> +gtp_frame_head_find_num(int num)
> +{
> + char *tmp = gtp_frame_r_start;
> + int tfnum = 0;
> +
> + do {
> + if (FID(tmp) == FID_HEAD) {
> + if (tfnum == num) {
> + gtp_frame_current_num = num;
> + gtp_frame_current = tmp;
> + return 0;
> + }
> + tfnum++;
> + }
> +
> + tmp = gtp_frame_next(tmp);
> + if (!tmp)
> + break;
> +
> + if (tmp == gtp_frame_end)
> + tmp = gtp_frame;
> + } while (tmp != gtp_frame_w_start);
> +
> + return -1;
> +}
> +
> +static int
> +gtp_gdbrsp_qtframe(char *pkg)
> +{
> + int ret = -1;
> +
> + if (gtp_start)
> + return -EBUSY;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qtframe: %s\n", pkg);
> +#endif
> +
> + if (atomic_read(>p_frame_create) == 0)
> + goto out;
> +
> + if (strncmp(pkg, "pc:", 3) == 0) {
> + ULONGEST addr;
> +
> + pkg += 3;
> +
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + hex2ulongest(pkg, &addr);
> +
> + ret = gtp_frame_head_find_addr(gtp_frame_current, 1,
> + (unsigned long)addr,
> + (unsigned long)addr);
> + } else if (strncmp(pkg, "tdp:", 4) == 0) {
> + ULONGEST trace;
> +
> + pkg += 4;
> +
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + hex2ulongest(pkg, &trace);
> +
> + ret = gtp_frame_head_find_trace(gtp_frame_current, trace);
> + } else if (strncmp(pkg, "range:", 6) == 0) {
> + ULONGEST start, end;
> +
> + pkg += 6;
> +
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg = hex2ulongest(pkg, &start);
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg++;
> + hex2ulongest(pkg, &end);
> +
> + ret = gtp_frame_head_find_addr(gtp_frame_current, 1,
> + (unsigned long)start,
> + (unsigned long)end);
> + } else if (strncmp(pkg, "outside:", 8) == 0) {
> + ULONGEST start, end;
> +
> + pkg += 8;
> +
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg = hex2ulongest(pkg, &start);
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg++;
> + hex2ulongest(pkg, &end);
> +
> + ret = gtp_frame_head_find_addr(gtp_frame_current, 0,
> + (unsigned long)start,
> + (unsigned long)end);
> + } else {
> + ULONGEST num;
> +
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + hex2ulongest(pkg, &num);
> +
> + if (((int) num) < 0) {
> + /* Return to current. */
> + gtp_frame_current = NULL;
> + gtp_frame_current_num = 0;
> +
> + return 0;
> + }
> + ret = gtp_frame_head_find_num((int) num);
> + }
> +
> +out:
> + if (ret) {
> + strcpy(gtp_rw_bufp, "F-1");
> + gtp_rw_bufp += 3;
> + gtp_rw_size += 3;
> + } else {
> + sprintf(gtp_rw_bufp, "F%xT%x",
> + gtp_frame_current_num,
> + (unsigned int)
> + *(ULONGEST *)(gtp_frame_current + FID_SIZE
> + + sizeof(char *)));
> + gtp_rw_size += strlen(gtp_rw_bufp);
> + gtp_rw_bufp += strlen(gtp_rw_bufp);
> + }
> + return 1;
> +}
> +
> +static int
> +gtp_gdbrsp_qtro(char *pkg)
> +{
> + ULONGEST start, end;
> +
> + gtpro_list_clear();
> +
> + while (pkg[0]) {
> + pkg = hex2ulongest(pkg, &start);
> + if (pkg[0] != ',')
> + return -EINVAL;
> + pkg++;
> + pkg = hex2ulongest(pkg, &end);
> + if (pkg[0])
> + pkg++;
> +
> + if (gtpro_list_add((CORE_ADDR)start, (CORE_ADDR)end) == NULL)
> + return -ENOMEM;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +gtp_gdbrsp_qtdv(char *pkg)
> +{
> + ULONGEST num, val;
> + struct gtp_var *var;
> + char *src;
> +
> + pkg = hex2ulongest(pkg, &num);
> + if (GTP_VAR_IS_SPECIAL(num))
> + return 0;
> + if (pkg[0] != ':')
> + return -EINVAL;
> + pkg++;
> + src = pkg;
> + pkg = hex2ulongest(pkg, &val);
> + if (pkg[0] != ':')
> + return -EINVAL;
> + pkg++;
> +
> + var = gtp_var_find(num);
> + if (var)
> + return -EINVAL;
> +
> + if (!gtp_var_add((unsigned int)num, (uint64_t)val, src))
> + return -ENOMEM;
> +
> + return 0;
> +}
> +
> +static int
> +gtp_gdbrsp_QT(char *pkg)
> +{
> + int ret = 1;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_QT: %s\n", pkg);
> +#endif
> +
> + if (strcmp("init", pkg) == 0)
> + ret = gtp_gdbrsp_qtinit();
> + else if (strcmp("Stop", pkg) == 0)
> + ret = gtp_gdbrsp_qtstop();
> + else if (strcmp("Start", pkg) == 0)
> + ret = gtp_gdbrsp_qtstart();
> + else if (strncmp("DP:", pkg, 3) == 0)
> + ret = gtp_gdbrsp_qtdp(pkg + 3);
> + else if (strncmp("DPsrc:", pkg, 6) == 0)
> + ret = gtp_gdbrsp_qtdpsrc(pkg + 6);
> + else if (strncmp("Disconnected:", pkg, 13) == 0)
> + ret = gtp_gdbrsp_qtdisconnected(pkg + 13);
> + else if (strncmp("Buffer:", pkg, 7) == 0)
> + ret = gtp_gdbrsp_qtbuffer(pkg + 7);
> + else if (strncmp("Frame:", pkg, 6) == 0)
> + ret = gtp_gdbrsp_qtframe(pkg + 6);
> + else if (strncmp("ro:", pkg, 3) == 0)
> + ret = gtp_gdbrsp_qtro(pkg + 3);
> + else if (strncmp("DV:", pkg, 3) == 0)
> + ret = gtp_gdbrsp_qtdv(pkg + 3);
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_QT: return %d\n", ret);
> +#endif
> +
> + return ret;
> +}
> +
> +static int
> +gtp_get_status(struct gtp_entry *tpe, char *buf)
> +{
> + int size = 0;
> + int tfnum = 0;
> + CORE_ADDR tmpaddr;
> +
> + if (!gtp_frame) {
> + sprintf(buf, "tnotrun:0;");
> + buf += 10;
> + size += 10;
> + } else if (!tpe || (tpe && tpe->reason == gtp_stop_normal)) {
> + sprintf(buf, "tstop:0;");
> + buf += 8;
> + size += 8;
> + } else {
> + char outtmp[100];
> +
> + switch (tpe->reason) {
> + case gtp_stop_frame_full:
> + sprintf(buf, "tfull:%lx;",
> + (unsigned long)tpe->num);
> + break;
> + case gtp_stop_efault:
> + sprintf(buf, "terror:%s:%lx;",
> + string2hex("read memory false", outtmp),
> + (unsigned long)tpe->num);
> + break;
> + case gtp_stop_access_wrong_reg:
> + sprintf(buf, "terror:%s:%lx;",
> + string2hex("access wrong register", outtmp),
> + (unsigned long)tpe->num);
> + break;
> + case gtp_stop_agent_expr_code_error:
> + sprintf(buf, "terror:%s:%lx;",
> + string2hex("agent expression code error",
> + outtmp),
> + (unsigned long)tpe->num);
> + break;
> + case gtp_stop_agent_expr_stack_overflow:
> + sprintf(buf, "terror:%s:%lx;",
> + string2hex("agent expression stack overflow",
> + outtmp),
> + (unsigned long)tpe->num);
> + break;
> + default:
> + buf[0] = '\0';
> + break;
> + }
> +
> + size += strlen(buf);
> + buf += strlen(buf);
> + }
> +
> + if (atomic_read(>p_frame_create)) {
> + char *tmp = gtp_frame_r_start;
> +
> + do {
> + if (FID(tmp) == FID_HEAD)
> + tfnum++;
> +
> + tmp = gtp_frame_next(tmp);
> + if (!tmp)
> + break;
> +
> + if (tmp == gtp_frame_end)
> + tmp = gtp_frame;
> + } while (tmp != gtp_frame_w_start);
> + }
> + sprintf(buf, "tframes:%x;", tfnum);
> + size += strlen(buf);
> + buf += strlen(buf);
> +
> + sprintf(buf, "tcreated:%x;", atomic_read(>p_frame_create));
> + size += strlen(buf);
> + buf += strlen(buf);
> +
> + sprintf(buf, "tsize:%x;", GTP_FRAME_SIZE);
> + size += strlen(buf);
> + buf += strlen(buf);
> +
> + spin_lock(>p_frame_lock);
> + if (gtp_frame_is_circular)
> + tmpaddr = 0;
> + else
> + tmpaddr = GTP_FRAME_SIZE - (gtp_frame_w_start - gtp_frame);
> + spin_unlock(>p_frame_lock);
> + sprintf(buf, "tfree:%lx;", (unsigned long)tmpaddr);
> + size += strlen(buf);
> + buf += strlen(buf);
> +
> + sprintf(buf, "circular:%x;", gtp_circular);
> + size += strlen(buf);
> + buf += strlen(buf);
> +
> + sprintf(buf, "disconn:%x", gtp_disconnected_tracing);
> + size += strlen(buf);
> + buf += strlen(buf);
> +
> + return size;
> +}
> +
> +static int
> +gtp_gdbrsp_qtstatus(void)
> +{
> + struct gtp_entry *tpe;
> + int tmp;
> +
> + for (tpe = gtp_list; tpe; tpe = tpe->next) {
> + if (tpe->reason != gtp_stop_normal)
> + break;
> + }
> +
> + if (gtp_start && tpe) /* Tpe is stop, stop all tpes. */
> + gtp_gdbrsp_qtstop();
> +
> + sprintf(gtp_rw_bufp, "T%x;", gtp_start ? 1 : 0);
> + gtp_rw_bufp += 3;
> + gtp_rw_size += 3;
> +
> + tmp = gtp_get_status(tpe, gtp_rw_bufp);
> + gtp_rw_bufp += tmp;
> + gtp_rw_size += tmp;
> +
> + return 1;
> +}
> +
> +static void
> +gtp_report_tracepoint(struct gtp_entry *gtp, char *buf)
> +{
> + sprintf(buf, "T%lx:%lx:%c:%lx:%lx",
> + (unsigned long)gtp->num,
> + (unsigned long)gtp->addr,
> + (gtp->disable ? 'D' : 'E'),
> + (unsigned long)gtp->step,
> + (unsigned long)gtp->pass);
> +}
> +
> +static void
> +gtp_report_action(struct gtp_entry *gtp, struct action *action, char *buf)
> +{
> + sprintf(buf, "A%lx:%lx:%s",
> + (unsigned long)gtp->num,
> + (unsigned long)gtp->addr,
> + action->src);
> +}
> +
> +static void
> +gtp_report_src(struct gtp_entry *gtp, struct gtpsrc *src, char *buf)
> +{
> + sprintf(buf, "Z%lx:%lx:%s",
> + (unsigned long)gtp->num,
> + (unsigned long)gtp->addr,
> + src->src);
> +}
> +
> +static void
> +gtp_current_set_check(void)
> +{
> + if (current_gtp_src == NULL)
> + current_gtp = current_gtp->next;
> +}
> +
> +static void
> +gtp_current_action_check(void)
> +{
> + if (current_gtp_action == NULL) {
> + current_gtp_src = current_gtp->src;
> + gtp_current_set_check();
> + }
> +}
> +
> +static int
> +gtp_gdbrsp_qtfp(void)
> +{
> + if (gtp_list) {
> + current_gtp = gtp_list;
> + gtp_report_tracepoint(current_gtp, gtp_rw_bufp);
> + gtp_rw_size += strlen(gtp_rw_bufp);
> + gtp_rw_bufp += strlen(gtp_rw_bufp);
> + current_gtp_action = current_gtp->action_list;
> + gtp_current_action_check();
> + } else {
> + gtp_rw_bufp[0] = 'l';
> + gtp_rw_size += 1;
> + gtp_rw_bufp += 1;
> + }
> +
> + return 1;
> +}
> +
> +static int
> +gtp_gdbrsp_qtsp(void)
> +{
> + if (current_gtp_action) {
> + gtp_report_action(current_gtp, current_gtp_action,
> + gtp_rw_bufp);
> + gtp_rw_size += strlen(gtp_rw_bufp);
> + gtp_rw_bufp += strlen(gtp_rw_bufp);
> + current_gtp_action = current_gtp_action->next;
> + gtp_current_action_check();
> + goto out;
> + }
> +
> + if (current_gtp_src) {
> + gtp_report_src(current_gtp, current_gtp_src, gtp_rw_bufp);
> + gtp_rw_size += strlen(gtp_rw_bufp);
> + gtp_rw_bufp += strlen(gtp_rw_bufp);
> + current_gtp_src = current_gtp_src->next;
> + gtp_current_set_check();
> + goto out;
> + }
> +
> + if (current_gtp) {
> + gtp_report_tracepoint(current_gtp, gtp_rw_bufp);
> + gtp_rw_size += strlen(gtp_rw_bufp);
> + gtp_rw_bufp += strlen(gtp_rw_bufp);
> + current_gtp_action = current_gtp->action_list;
> + gtp_current_action_check();
> + } else {
> + gtp_rw_bufp[0] = 'l';
> + gtp_rw_size += 1;
> + gtp_rw_bufp += 1;
> + }
> +out:
> + return 1;
> +}
> +
> +static void
> +gtp_report_var(void)
> +{
> + sprintf(gtp_rw_bufp, "%x:%s", current_gtp_var->num,
> + current_gtp_var->src);
> + gtp_rw_size += strlen(gtp_rw_bufp);
> + gtp_rw_bufp += strlen(gtp_rw_bufp);
> +}
> +
> +static int
> +gtp_gdbrsp_qtfsv(int f)
> +{
> + if (f)
> + current_gtp_var = gtp_var_list;
> +
> + if (current_gtp_var) {
> + gtp_report_var();
> + current_gtp_var = current_gtp_var->next;
> + } else {
> + gtp_rw_bufp[0] = 'l';
> + gtp_rw_size += 1;
> + gtp_rw_bufp += 1;
> + }
> +
> + return 1;
> +}
> +
> +static int
> +gtp_gdbrsp_qtv(char *pkg)
> +{
> + ULONGEST num;
> + struct gtp_var *var = NULL;
> + struct gtp_frame_var *vr = NULL;
> + uint64_t val;
> +
> + pkg = hex2ulongest(pkg, &num);
> +
> + if (gtp_start || !gtp_frame_current) {
> + if (!GTP_VAR_IS_SPECIAL(num)) {
> + var = gtp_var_find(num);
> + if (var)
> + val = var->val;
> + }
> + } else {
> + char *next;
> +
> + for (next = *(char **)(gtp_frame_current + FID_SIZE); next;
> + next = *(char **)(next + FID_SIZE)) {
> + if (FID(next) == FID_VAR) {
> + vr = (struct gtp_frame_var *)
> + (next + FID_SIZE + sizeof(char *));
> + if (vr->num == (unsigned int)num)
> + goto while_stop;
> + }
> + }
> + vr = NULL;
> +while_stop:
> + if (vr)
> + val = vr->val;
> + }
> +
> + if (var || vr) {
> + sprintf(gtp_rw_bufp, "V%08x%08x",
> + (unsigned int) (val >> 32),
> + (unsigned int) (val & 0xffffffff));
> + gtp_rw_size += strlen(gtp_rw_bufp);
> + gtp_rw_bufp += strlen(gtp_rw_bufp);
> + } else {
> + gtp_rw_bufp[0] = 'U';
> + gtp_rw_size += 1;
> + gtp_rw_bufp += 1;
> + }
> +
> + return 1;
> +}
> +
> +static int
> +gtp_gdbrsp_qT(char *pkg)
> +{
> + int ret = 1;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_qT: %s\n", pkg);
> +#endif
> +
> + if (strcmp("Status", pkg) == 0)
> + ret = gtp_gdbrsp_qtstatus();
> + else if (strcmp("fP", pkg) == 0)
> + ret = gtp_gdbrsp_qtfp();
> + else if (strcmp("sP", pkg) == 0)
> + ret = gtp_gdbrsp_qtsp();
> + else if (strcmp("fV", pkg) == 0)
> + ret = gtp_gdbrsp_qtfsv(1);
> + else if (strcmp("sV", pkg) == 0)
> + ret = gtp_gdbrsp_qtfsv(0);
> + else if (strncmp("V:", pkg, 2) == 0)
> + ret = gtp_gdbrsp_qtv(pkg + 2);
> +
> + return ret;
> +}
> +
> +static uint8_t gtp_m_buffer[0xffff];
> +
> +static int
> +gtp_gdbrsp_m(char *pkg)
> +{
> + int i;
> + ULONGEST addr, len;
> +
> + /* Get add and len. */
> + if (pkg[0] == '\0')
> + return -EINVAL;
> + pkg = hex2ulongest(pkg, &addr);
> + if (pkg[0] != ',')
> + return -EINVAL;
> + pkg++;
> + pkg = hex2ulongest(pkg, &len);
> + if (len == 0)
> + return -EINVAL;
> + len &= 0xffff;
> + len = (ULONGEST) min((int)((GTP_RW_MAX - 4 - gtp_rw_size) / 2),
> + (int)len);
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_m: addr = 0x%lx len = %d\n",
> + (unsigned long) addr, (int) len);
> +#endif
> +
> + if (gtp_start || !gtp_frame_current) {
> + if (probe_kernel_read(gtp_m_buffer, (void *)(CORE_ADDR)addr,
> + (size_t)len))
> + return -EFAULT;
> + } else {
> + char *next;
> + int ret;
> +
> + /* The following part is for gtpro support.
> + It is not available because it make disassemble cannot
> + work when select a trace frame. */
> +#if 0
> + struct gtpro_entry *gtroe;
> +
> + memset(gtp_m_buffer, 0, len);
> +
> + /* Read the gtpro. */
> + for (gtroe = gtpro_list; gtroe; gtroe = gtroe->next) {
> + CORE_ADDR cur_start, cur_end;
> +
> + cur_start = max(gtroe->start, (CORE_ADDR)addr);
> + cur_end = min(gtroe->end, ((CORE_ADDR)(addr + len)));
> + if (cur_start < cur_end) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_m: ro read "
> + "start = 0x%lx end = 0x%lx\n",
> + (unsigned long) cur_start,
> + (unsigned long) cur_end);
> +#endif
> + if (probe_kernel_read(gtp_m_buffer,
> + (void *)cur_start,
> + (size_t)(cur_end
> + - cur_start)))
> + return -EFAULT;
> + }
> + }
> +#endif
> + ret = probe_kernel_read(gtp_m_buffer, (void *)(CORE_ADDR)addr,
> + (size_t)len);
> +
> + for (next = *(char **)(gtp_frame_current + FID_SIZE); next;
> + next = *(char **)(next + FID_SIZE)) {
> + if (FID(next) == FID_MEM) {
> + struct gtp_frame_mem *mr;
> + ULONGEST cur_start, cur_end;
> + uint8_t *buf;
> +
> + mr = (struct gtp_frame_mem *)
> + (next + FID_SIZE + sizeof(char *));
> + buf = next + GTP_FRAME_MEM_SIZE;
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_m: section "
> + "addr = 0x%lx size = %lu\n",
> + (unsigned long) mr->addr,
> + (unsigned long) mr->size);
> +#endif
> + cur_start = max(((ULONGEST)mr->addr), addr);
> + cur_end = min(((ULONGEST)mr->addr
> + + mr->size),
> + (addr + len));
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_m: read "
> + "start = 0x%lx end = 0x%lx\n",
> + (unsigned long) cur_start,
> + (unsigned long) cur_end);
> +#endif
> + if (cur_start < cur_end) {
> + memcpy(gtp_m_buffer,
> + buf + cur_start - mr->addr,
> + cur_end - cur_start);
> + ret = 0;
> + }
> + }
> + }
> +
> + if (ret)
> + return -EFAULT;
> + }
> +
> + for (i = 0; i < (int)len; i++) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_gdbrsp_m: %d %02x\n", i, gtp_m_buffer[i]);
> +#endif
> + sprintf(gtp_rw_bufp, "%02x", gtp_m_buffer[i]);
> + gtp_rw_bufp += 2;
> + gtp_rw_size += 2;
> + }
> +
> + return 1;
> +}
> +
> +static int
> +gtp_gdbrsp_g(void)
> +{
> + char *next;
> + struct pt_regs *regs;
> +
> + if (GTP_RW_MAX - 4 - gtp_rw_size < GTP_REG_ASCII_SIZE)
> + return -E2BIG;
> +
> + if (gtp_start || !gtp_frame_current) {
> + memset(gtp_rw_bufp, '0', GTP_REG_ASCII_SIZE);
> + goto out;
> + }
> +
> + /* Get the regs. */
> + regs = NULL;
> + for (next = *(char **)(gtp_frame_current + FID_SIZE); next;
> + next = *(char **)(next + FID_SIZE)) {
> + if (FID(next) == FID_REG) {
> + regs = (struct pt_regs *)
> + (next + FID_SIZE + sizeof(char *));
> + break;
> + }
> + }
> + if (regs)
> + gtp_regs2ascii(regs, gtp_rw_bufp);
> + else {
> + struct pt_regs pregs;
> + struct gtp_entry *tpe;
> +
> + memset(&pregs, '\0', sizeof(struct pt_regs));
> + tpe = gtp_list_find(*(ULONGEST *)(gtp_frame_current
> + + FID_SIZE + sizeof(char *)));
> + if (tpe)
> + GTP_REGS_PC(&pregs) = (unsigned long)tpe->addr;
> + gtp_regs2ascii(&pregs, gtp_rw_bufp);
> + }
> +out:
> + gtp_rw_bufp += GTP_REG_ASCII_SIZE;
> + gtp_rw_size += GTP_REG_ASCII_SIZE;
> +
> + return 1;
> +}
> +
> +static DEFINE_SEMAPHORE(gtp_rw_lock);
> +static DECLARE_WAIT_QUEUE_HEAD(gtp_rw_wq);
> +static unsigned int gtp_rw_count;
> +
> +static int
> +gtp_open(struct inode *inode, struct file *file)
> +{
> + int ret = 0;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_open\n");
> +#endif
> +
> + down(>p_rw_lock);
> + if (gtp_rw_count == 0) {
> + gtp_read_ack = 0;
> + gtp_rw_buf = vmalloc(GTP_RW_MAX);
> + if (!gtp_rw_buf) {
> + ret = -ENOMEM;
> + goto out;
> + }
> + }
> + gtp_rw_count++;
> +
> +out:
> + up(>p_rw_lock);
> + return ret;
> +}
> +
> +static int
> +gtp_release(struct inode *inode, struct file *file)
> +{
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_release\n");
> +#endif
> +
> + down(>p_rw_lock);
> + gtp_rw_count--;
> + if (gtp_rw_count == 0) {
> + vfree(gtp_rw_buf);
> +
> + if (!gtp_disconnected_tracing) {
> + gtp_gdbrsp_qtstop();
> + gtp_gdbrsp_qtinit();
> + if (gtp_frame) {
> + vfree(gtp_frame);
> + gtp_frame = NULL;
> + }
> + }
> + }
> + up(>p_rw_lock);
> +
> + return 0;
> +}
> +
> +static long
> +gtp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> +{
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_ioctl: %x\n", cmd);
> +#endif
> +
> + return 0;
> +}
> +
> +static ssize_t
> +gtp_write(struct file *file, const char __user *buf, size_t size,
> + loff_t *ppos)
> +{
> + char *rsppkg = NULL;
> + int i, ret;
> + unsigned char csum = 0;
> +
> + if (down_interruptible(>p_rw_lock))
> + return -EINTR;
> +
> + if (size == 0) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_write: try write 0 size.\n");
> +#endif
> + goto error_out;
> + }
> +
> + size = min(size, (size_t) GTP_RW_MAX);
> + if (copy_from_user(gtp_rw_buf, buf, size)) {
> + size = -EFAULT;
> + goto error_out;
> + }
> +
> + if (gtp_rw_buf[0] == '+' || gtp_rw_buf[0] == '-'
> + || gtp_rw_buf[0] == '\3') {
> + if (gtp_rw_buf[0] == '+')
> + gtp_rw_size = 0;
> + size = 1;
> + goto out;
> + }
> +
> + if (size < 4) {
> + gtp_read_ack = '-';
> + goto out;
> + }
> + /* Check format and crc and get the rsppkg. */
> + for (i = 0; i < size - 2; i++) {
> + if (rsppkg == NULL) {
> + if (gtp_rw_buf[i] == '$')
> + rsppkg = gtp_rw_buf + i + 1;
> + } else {
> + if (gtp_rw_buf[i] == '#')
> + break;
> + else
> + csum += gtp_rw_buf[i];
> + }
> + }
> + if (rsppkg && gtp_rw_buf[i] == '#') {
> + /* Format is OK. Check crc. */
> + unsigned char c1, c2;
> +
> + gtp_rw_buf[i] = '\0';
> +
> + c1 = gtp_rw_buf[i+1];
> + c2 = gtp_rw_buf[i+2];
> + if (csum == (c1 << 4) + c2) {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_write: crc error\n");
> +#endif
> + gtp_read_ack = '-';
> + goto out;
> + }
> + } else {
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_write: format error\n");
> +#endif
> + gtp_read_ack = '-';
> + goto out;
> + }
> + gtp_read_ack = '+';
> + size = i + 3;
> +
> + wake_up_interruptible_nr(>p_rw_wq, 1);
> +
> + up(>p_rw_lock);
> + if (down_interruptible(>p_rw_lock))
> + return -EINTR;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_write: %s\n", rsppkg);
> +#endif
> +
> + /* Handle rsppkg and put return to gtp_rw_buf. */
> + gtp_rw_buf[0] = '$';
> + gtp_rw_bufp = gtp_rw_buf + 1;
> + gtp_rw_size = 0;
> + ret = 1;
> + switch (rsppkg[0]) {
> + case '?':
> + strcpy(gtp_rw_bufp, "S05");
> + gtp_rw_bufp += 3;
> + gtp_rw_size += 3;
> + break;
> + case 'g':
> + ret = gtp_gdbrsp_g();
> + break;
> + case 'm':
> + ret = gtp_gdbrsp_m(rsppkg + 1);
> + break;
> + case 'Q':
> + if (rsppkg[1] == 'T')
> + ret = gtp_gdbrsp_QT(rsppkg + 2);
> + break;
> + case 'q':
> + if (rsppkg[1] == 'T')
> + ret = gtp_gdbrsp_qT(rsppkg + 2);
> + else if (strncmp("qSupported", rsppkg, 10) == 0) {
> + strcpy(gtp_rw_bufp,
> + "ConditionalTracepoints+;"
> + "TracepointSource+;DisconnectedTracing+");
> + gtp_rw_size += strlen(gtp_rw_bufp);
> + gtp_rw_bufp += strlen(gtp_rw_bufp);
> + ret = 1;
> + }
> + break;
> + case 's':
> + case 'S':
> + case 'c':
> + case 'C':
> + ret = -1;
> + break;
> + }
> + if (ret == 0) {
> + strcpy(gtp_rw_bufp, "OK");
> + gtp_rw_bufp += 2;
> + gtp_rw_size += 2;
> + } else if (ret < 0) {
> + sprintf(gtp_rw_bufp, "E%02x", -ret);
> + gtp_rw_bufp += 3;
> + gtp_rw_size += 3;
> + }
> +
> + gtp_rw_bufp[0] = '#';
> + csum = 0;
> + for (i = 1; i < gtp_rw_size + 1; i++)
> + csum += gtp_rw_buf[i];
> + gtp_rw_bufp[1] = TOHEX(csum >> 4);
> + gtp_rw_bufp[2] = TOHEX(csum & 0x0f);
> + gtp_rw_bufp = gtp_rw_buf;
> + gtp_rw_size += 4;
> +
> +out:
> + wake_up_interruptible_nr(>p_rw_wq, 1);
> +error_out:
> + up(>p_rw_lock);
> + return size;
> +}
> +
> +static ssize_t
> +gtp_read(struct file *file, char __user *buf, size_t size,
> + loff_t *ppos)
> +{
> + int err;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_read\n");
> +#endif
> +
> + if (size == 0)
> + goto out;
> +
> + if (down_interruptible(>p_rw_lock))
> + return -EINTR;
> +
> + if (gtp_read_ack) {
> + err = put_user(gtp_read_ack, buf);
> + if (err) {
> + size = -err;
> + goto out;
> + }
> + gtp_read_ack = 0;
> + size = 1;
> + goto out;
> + }
> +
> + size = min(gtp_rw_size, size);
> + if (size == 0)
> + goto out;
> + if (copy_to_user(buf, gtp_rw_bufp, size)) {
> + size = -EFAULT;
> + goto out;
> + }
> + gtp_rw_bufp += size;
> + gtp_rw_size -= size;
> +
> +out:
> + up(>p_rw_lock);
> + return size;
> +}
> +
> +static unsigned int
> +gtp_poll(struct file *file, poll_table *wait)
> +{
> + unsigned int mask = POLLOUT | POLLWRNORM;
> +
> +#ifdef GTP_DEBUG
> + printk(GTP_DEBUG "gtp_poll\n");
> +#endif
> +
> + down(>p_rw_lock);
> + poll_wait(file, >p_rw_wq, wait);
> + if (gtp_read_ack || gtp_rw_size)
> + mask |= POLLIN | POLLRDNORM;
> + up(>p_rw_lock);
> +
> + return mask;
> +}
> +
> +static char *
> +gtp_frame_file_realloc(size_t *real_size, size_t size, int is_end)
> +{
> + if (*real_size < gtp_frame_file_size + size) {
> + char *tmp;
> +
> + *real_size = gtp_frame_file_size + size;
> + if (!is_end)
> + *real_size += 100;
> +
> + tmp = vmalloc(*real_size);
> + if (!tmp) {
> + vfree(gtp_frame_file);
> + return NULL;
> + }
> +
> + memcpy(tmp, gtp_frame_file, gtp_frame_file_size);
> + vfree(gtp_frame_file);
> + gtp_frame_file = tmp;
> + }
> +
> + return gtp_frame_file + gtp_frame_file_size;
> +}
> +
> +static int
> +gtp_frame2file_m(size_t *real_sizep, uint32_t *data_size, char *frame)
> +{
> + struct gtp_frame_mem *mr;
> + uint8_t *buf;
> + ULONGEST addr;
> + size_t remaining;
> +
> + mr = (struct gtp_frame_mem *) (frame + FID_SIZE + sizeof(char *));
> + buf = frame + GTP_FRAME_MEM_SIZE;
> + addr = mr->addr;
> + remaining = mr->size;
> +
> + while (remaining > 0) {
> + uint16_t blocklen;
> + char *wbuf;
> + size_t sp;
> +
> + blocklen = remaining > 65535 ? 65535 : remaining;
> +
> + sp = 1 + sizeof(addr) + sizeof(blocklen) + blocklen;
> + wbuf = gtp_frame_file_realloc(real_sizep, sp, 0);
> + if (!wbuf)
> + return -1;
> +
> + wbuf[0] = 'M';
> + wbuf += 1;
> +
> + memcpy(wbuf, &addr, sizeof(addr));
> + wbuf += sizeof(addr);
> +
> + memcpy(wbuf, &blocklen, sizeof(blocklen));
> + wbuf += sizeof(blocklen);
> +
> + memcpy(wbuf, buf, blocklen);
> +
> + addr += blocklen;
> + remaining -= blocklen;
> + buf += blocklen;
> +
> + gtp_frame_file_size += sp;
> + *data_size += sp;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +gtp_frame2file_v(size_t *real_sizep, uint32_t *data_size, char *frame)
> +{
> + struct gtp_frame_var *vr;
> + size_t sp = 1 + sizeof(unsigned int)
> + + sizeof(uint64_t);
> + char *wbuf;
> +
> + wbuf = gtp_frame_file_realloc(real_sizep, sp, 0);
> + if (!wbuf)
> + return -1;
> +
> + vr = (struct gtp_frame_var *) (frame + FID_SIZE + sizeof(char *));
> +
> + wbuf[0] = 'V';
> + wbuf += 1;
> +
> + memcpy(wbuf, &vr->num, sizeof(unsigned int));
> + wbuf += sizeof(unsigned int);
> +
> + memcpy(wbuf, &vr->val, sizeof(uint64_t));
> + wbuf += sizeof(uint64_t);
> +
> + gtp_frame_file_size += sp;
> + *data_size += sp;
> +
> + return 0;
> +}
> +
> +static int
> +gtp_frame2file(size_t *real_sizep, char *frame)
> +{
> + int16_t *tmp16p;
> + char *next;
> + char *wbuf;
> + uint32_t data_size;
> +
> + /* Head. */
> + tmp16p = (int16_t *)gtp_frame_file_realloc(real_sizep, 2, 0);
> + if (!tmp16p)
> + return -1;
> + *tmp16p = (int16_t)*(ULONGEST *)(frame + FID_SIZE + sizeof(char *));
> + gtp_frame_file_size += 2;
> + /* This part is for the data_size. */
> + wbuf = gtp_frame_file_realloc(real_sizep, 4, 0);
> + if (!wbuf)
> + return -1;
> + gtp_frame_file_size += 4;
> +
> + /* Body. */
> + data_size = 0;
> + for (next = *(char **)(frame + FID_SIZE); next;
> + next = *(char **)(next + FID_SIZE)) {
> + switch (FID(next)) {
> + case FID_REG:
> + wbuf = gtp_frame_file_realloc(real_sizep,
> + GTP_REG_BIN_SIZE + 1,
> + 0);
> + if (!wbuf)
> + return -1;
> + wbuf[0] = 'R';
> + gtp_regs2bin((struct pt_regs *)(next + FID_SIZE
> + + sizeof(char *)),
> + wbuf + 1);
> + gtp_frame_file_size += GTP_REG_BIN_SIZE + 1;
> + data_size += GTP_REG_BIN_SIZE + 1;
> + break;
> +
> + case FID_MEM:
> + if (gtp_frame2file_m(real_sizep, &data_size, next))
> + return -1;
> + break;
> +
> + case FID_VAR:
> + if (gtp_frame2file_v(real_sizep, &data_size, next))
> + return -1;
> + break;
> + }
> + }
> +
> + /* Set the data_size. */
> + memcpy(gtp_frame_file + gtp_frame_file_size - data_size - 4,
> + &data_size, 4);
> +
> + return 0;
> +}
> +
> +static ssize_t
> +gtpframe_read(struct file *file, char __user *buf, size_t size,
> + loff_t *ppos)
> +{
> + ssize_t ret = -ENOMEM;
> +
> + down(>p_rw_lock);
> +
> + if (gtp_start) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> + /* Set gtp_frame_file if need. */
> + if (!gtp_frame_file) {
> + size_t real_size;
> + char *wbuf;
> + struct gtp_entry *tpe;
> + struct gtp_var *tvar;
> + int tmpsize;
> + char tmpbuf[200];
> + char *frame;
> +
> + if (gtp_frame_is_circular)
> + real_size = GTP_FRAME_SIZE;
> + else
> + real_size = gtp_frame_w_start - gtp_frame;
> + real_size += 200;
> +
> + gtp_frame_file = vmalloc(real_size);
> + if (!gtp_frame_file)
> + goto out;
> + gtp_frame_file_size = 0;
> +
> + /* Head. */
> + wbuf = gtp_frame_file;
> + strcpy(wbuf, "\x7fTRACE0\n");
> + gtp_frame_file_size += 8;
> +
> + /* BUG: will be a new value. */
> + snprintf(tmpbuf, 200, "R %x\n", GTP_REG_BIN_SIZE);
> + wbuf = gtp_frame_file_realloc(&real_size, strlen(tmpbuf), 0);
> + if (!wbuf)
> + goto out;
> + strcpy(wbuf, tmpbuf);
> + gtp_frame_file_size += strlen(tmpbuf);
> +
> + strcpy(tmpbuf, "status 0;");
> + wbuf = gtp_frame_file_realloc(&real_size, strlen(tmpbuf), 0);
> + if (!wbuf)
> + goto out;
> + strcpy(wbuf, tmpbuf);
> + gtp_frame_file_size += strlen(tmpbuf);
> +
> + for (tpe = gtp_list; tpe; tpe = tpe->next) {
> + if (tpe->reason != gtp_stop_normal)
> + break;
> + }
> + tmpsize = gtp_get_status(tpe, tmpbuf);
> + wbuf = gtp_frame_file_realloc(&real_size, tmpsize, 0);
> + if (!wbuf)
> + goto out;
> + memcpy(wbuf, tmpbuf, tmpsize);
> + gtp_frame_file_size += tmpsize;
> +
> + wbuf = gtp_frame_file_realloc(&real_size, 1, 0);
> + if (!wbuf)
> + goto out;
> + wbuf[0] = '\n';
> + gtp_frame_file_size += 1;
> +
> + /* Tval. */
> + for (tvar = gtp_var_list; tvar; tvar = tvar->next) {
> + snprintf(tmpbuf, 200, "tsv %x:%s\n", tvar->num,
> + tvar->src);
> + wbuf = gtp_frame_file_realloc(&real_size,
> + strlen(tmpbuf), 0);
> + if (!wbuf)
> + goto out;
> + strcpy(wbuf, tmpbuf);
> + gtp_frame_file_size += strlen(tmpbuf);
> + }
> +
> + /* Tracepoint. */
> + for (tpe = gtp_list; tpe; tpe = tpe->next) {
> + struct action *ae;
> + struct gtpsrc *src;
> +
> + /* Tpe. */
> + gtp_report_tracepoint(tpe, tmpbuf);
> + wbuf = gtp_frame_file_realloc(&real_size,
> + strlen(tmpbuf) + 5, 0);
> + if (!wbuf)
> + goto out;
> + sprintf(wbuf, "tp %s\n", tmpbuf);
> + gtp_frame_file_size += strlen(tmpbuf) + 4;
> + /* Action. */
> + for (ae = tpe->action_list; ae; ae = ae->next) {
> + gtp_report_action(tpe, ae, tmpbuf);
> + wbuf = gtp_frame_file_realloc
> + (&real_size, strlen(tmpbuf) + 5, 0);
> + if (!wbuf)
> + goto out;
> + sprintf(wbuf, "tp %s\n", tmpbuf);
> + gtp_frame_file_size += strlen(tmpbuf) + 4;
> + }
> + /* Src. */
> + for (src = tpe->src; src; src = src->next) {
> + gtp_report_src(tpe, src, tmpbuf);
> + wbuf = gtp_frame_file_realloc
> + (&real_size, strlen(tmpbuf) + 5, 0);
> + if (!wbuf)
> + goto out;
> + sprintf(wbuf, "tp %s\n", tmpbuf);
> + gtp_frame_file_size += strlen(tmpbuf) + 4;
> + }
> + }
> +
> + wbuf = gtp_frame_file_realloc(&real_size, 1, 0);
> + if (!wbuf)
> + goto out;
> + wbuf[0] = '\n';
> + gtp_frame_file_size += 1;
> +
> + /* Frame. */
> + if (atomic_read(>p_frame_create) == 0)
> + goto end;
> + frame = gtp_frame_r_start;
> + do {
> + if (FID(frame) == FID_HEAD) {
> + if (gtp_frame2file(&real_size, frame))
> + goto out;
> + }
> +
> + frame = gtp_frame_next(frame);
> + if (!frame)
> + break;
> +
> + if (frame == gtp_frame_end)
> + frame = gtp_frame;
> + } while (frame != gtp_frame_w_start);
> +
> +end:
> + /* End. */
> + wbuf = gtp_frame_file_realloc(&real_size, tmpsize, 2);
> + if (!wbuf)
> + goto out;
> + wbuf[0] = '\0';
> + wbuf[1] = '\0';
> + gtp_frame_file_size += 2;
> + }
> +
> + /* Set buf. */
> + ret = size;
> + if (*ppos + ret > gtp_frame_file_size) {
> + ret = gtp_frame_file_size - *ppos;
> + if (ret <= 0) {
> + ret = 0;
> + goto out;
> + }
> + }
> + if (copy_to_user(buf, gtp_frame_file + *ppos, ret)) {
> + size = -EFAULT;
> + goto out;
> + }
> + *ppos += ret;
> +
> +out:
> + up(>p_rw_lock);
> + return ret;
> +}
> +
> +static const struct file_operations gtp_operations = {
> + .owner = THIS_MODULE,
> + .open = gtp_open,
> + .release = gtp_release,
> + .unlocked_ioctl = gtp_ioctl,
> + .compat_ioctl = gtp_ioctl,
> + .read = gtp_read,
> + .write = gtp_write,
> + .poll = gtp_poll,
> +};
> +
> +static const struct file_operations gtpframe_operations = {
> + .owner = THIS_MODULE,
> + .open = gtp_open,
> + .release = gtp_release,
> + .read = gtpframe_read,
> + .llseek = default_llseek,
> +};
> +
> +struct dentry *gtp_dir;
> +struct dentry *gtpframe_dir;
> +
> +static int __init gtp_init(void)
> +{
> + int ret = -ENOMEM;
> +
> + gtp_list = NULL;
> + gtp_read_ack = 0;
> + gtp_rw_bufp = NULL;
> + gtp_rw_size = 0;
> + gtp_start = 0;
> + gtp_disconnected_tracing = 0;
> + gtp_circular = 0;
> + gtp_var_list = GTP_VAR_LIST_FIRST;
> + gtp_var_head = GTP_VAR_SPECIAL_MIN;
> + gtp_var_tail = GTP_VAR_SPECIAL_MAX;
> + gtp_var_array = NULL;
> + current_gtp_var = NULL;
> + gtp_frame = NULL;
> + gtp_frame_r_start = NULL;
> + gtp_frame_w_start = NULL;
> + gtp_frame_end = NULL;
> + gtp_frame_is_circular = 0;
> + gtp_frame_current = NULL;
> + gtp_frame_current_num = 0;
> + atomic_set(>p_frame_create, 0);
> + gtp_rw_count = 0;
> + current_gtp = NULL;
> + current_gtp_action = NULL;
> + current_gtp_src = NULL;
> + gtpro_list = NULL;
> + gtp_frame_file = NULL;
> + gtp_frame_file_size = 0;
> + gtp_dir = NULL;
> + gtpframe_dir = NULL;
> +
> + gtp_wq = create_singlethread_workqueue("gtpd");
> + if (gtp_wq == NULL)
> + goto out;
> +
> + gtp_dir = debugfs_create_file("gtp", S_IFIFO | S_IRUSR | S_IWUSR, NULL,
> + NULL, >p_operations);
> + if (gtp_dir == NULL || gtp_dir == ERR_PTR(-ENODEV)) {
> + gtp_dir = NULL;
> + goto out;
> + }
> + gtpframe_dir = debugfs_create_file("gtpframe", S_IFIFO | S_IRUSR, NULL,
> + NULL, >pframe_operations);
> + if (gtpframe_dir == NULL || gtpframe_dir == ERR_PTR(-ENODEV)) {
> + gtpframe_dir = NULL;
> + goto out;
> + }
> +
> + ret = 0;
> +out:
> + if (ret < 0) {
> + if (gtp_wq)
> + destroy_workqueue(gtp_wq);
> +
> + if (gtp_dir != NULL)
> + debugfs_remove_recursive(gtp_dir);
> + if (gtpframe_dir != NULL)
> + debugfs_remove_recursive(gtpframe_dir);
> + }
> +
> + return 0;
> +}
> +
> +static void __exit gtp_exit(void)
> +{
> + if (gtp_dir != NULL)
> + debugfs_remove_recursive(gtp_dir);
> + if (gtpframe_dir != NULL)
> + debugfs_remove_recursive(gtpframe_dir);
> +
> + gtp_gdbrsp_qtstop();
> + gtp_gdbrsp_qtinit();
> + if (gtp_frame) {
> + vfree(gtp_frame);
> + gtp_frame = NULL;
> + }
> +
> + destroy_workqueue(gtp_wq);
> +}
> +
> +module_init(gtp_init)
> +module_exit(gtp_exit)
> +
> +MODULE_AUTHOR("Hui Zhu <[email protected]>");
> +MODULE_LICENSE("GPL");
> --- /dev/null
> +++ b/scripts/getgtprsp.pl
> @@ -0,0 +1,102 @@
> +#!/usr/bin/perl
> +
> +# This script to get the GDB tracepoint RSP package and save it
> +# to ./gtpstart and ./gtpstop file.
> +# GPL
> +# Copyright(C) Hui Zhu ([email protected]), 2010
> +
> +binmode STDIN, ":raw";
> +$| = 1;
> +
> +$status = 0;
> +$circular = 0;
> +$var_count = 0;
> +
> +while (1) {
> + sysread STDIN, $c, 1 or next;
> + if ($c eq '') {
> + next;
> + } elsif ($c eq '+' || $c eq '-') {
> + $c = '';
> + }
> +
> + sysread STDIN, $line, 1024 or next;
> + print '+';
> + $line = $c.$line;
> +
> + open(LOG, ">>./log");
> + print LOG $line."\n";
> + close (LOG);
> +
> + if ($status == 0) {
> + if ($line eq '$?#3f') {
> + print '$S05#b8';
> + } elsif ($line eq '$g#67') {
> + print '$00000000#80';
> + } elsif ($line =~ /^\$m/ || $line =~ /^\$p/) {
> + print '$00000000#80';
> + } elsif ($line eq '$qTStatus#49') {
> + print '$T0;tnotrun:0;tframes:0;tcreated:0;tsize:';
> + print '500000;tfree:500000;circular:0;disconn:0#d1';
> + } elsif ($line eq '$QTBuffer:circular:1#f9') {
> + print '$OK#9a';
> + $circular = 1;
> + } elsif ($line eq '$QTBuffer:circular:0#f8') {
> + print '$OK#9a';
> + $circular = 0;
> + } elsif ($line eq '$QTStop#4b') {
> + print '$OK#9a';
> + } elsif ($line =~ /^\$qSupported/) {
> + print '$ConditionalTracepoints+;TracepointSource+#1b';
> + } elsif ($line eq '$QTinit#59') {
> + $status = 1;
> + open(STARTFILE, ">./gtpstart");
> + print STARTFILE '$QTDisconnected:1#e3'."\n";
> + if ($circular) {
> + print STARTFILE '$QTBuffer:circular:1#f9'."\n";
> + } else {
> + print STARTFILE '$QTBuffer:circular:0#f8'."\n";
> + }
> + } elsif ($line eq '$qTfV#81') {
> + print '$8:0:1:64756d705f737461636b#f6';
> + } elsif ($line eq '$qTsV#8e') {
> + if ($var_count == 0) {
> + print '$7:0:1:7072696e746b5f666f726d6174#9b';
> + } elsif ($var_count == 1) {
> + print '$6:8:1:7072696e746b5f6c6576656c#3a';
> + } elsif ($var_count == 2) {
> + print '$5:0:1:7072696e746b5f746d70#28';
> + } elsif ($var_count == 3) {
> + print '$4:0:1:6370755f6964#f3';
> + } elsif ($var_count == 4) {
> + print '$3:0:1:636c6f636b#e1';
> + } elsif ($var_count == 5) {
> + print '$2:0:1:63757272656e745f7468726561';
> + print '645f696e666f#1f';
> + } elsif ($var_count == 6) {
> + print '$1:0:1:63757272656e745f7461736b#c7';
> + } else {
> + print '$l#6c';
> + }
> + $var_count++;
> + } else {
> + print '$#00';
> + }
> + }
> +
> + if ($status == 1) {
> + print '$OK#9a';
> +
> + print STARTFILE $line."\n";
> +
> + if ($line eq '$QTStart#b3') {
> + $status = 0;
> +
> + close(STARTFILE);
> +
> + open(STOPFILE, ">./gtpstop");
> + print STOPFILE '$QTStop#4b'."\n";
> + close(STOPFILE);
> + }
> + }
> +}
> --
Perfect , Thanks
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
On Sun, 24 Apr 2011 22:47:49 +0800 Wanlong Gao wrote:
> > --
> Perfect , Thanks
Please don't include the full 153 KB patch in such replies.
---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
On Sun, 2011-04-24 at 22:28 +0800, Hui Zhu wrote:
There is several grammar mistakes, I'll correct those here that caused
me to have trouble understanding what you were saying. There's more
mistakes that I'm not correcting because I still understand what you
meant. I'll let Randy correct those, as he can come up with better
sentences than I can.
Do not take this as an insult, I have an utmost respect for those that
communicate on LKML in a language that is not their own mother tongue.
And I also understand that the Asian languages are even more different
than English that it makes it 10 times more difficult to get it right
(as suppose to those that speak German).
> --- /dev/null
> +++ b/Documentation/trace/gtp.txt
> @@ -0,0 +1,873 @@
> + Linux Kernel GDB tracepoint module (KGTP)
> + =========================================
> + By Hui Zhu <[email protected]>
> + https://code.google.com/p/kgtp/wiki/HOWTO
> + 2011-04-24
> +
> +Table of contents
> +-----------------
> +
> +What is KGTP
> +Report issue about KGTP
> +Get info about GDB tracepoint
> +Get KGTP through http
> +Get KGTP through svn
> +Config KGTP
> +Compile KGTP
> +Install KGTP
> +Uninstall KGTP
> +Howto use
> + Exec it
> + Make GDB connect to gtp
> + Add module symbols to GDB
> + Get GDB tracepoint commands
> + Get registers info from Kernel
> + Get the value of variable from Kernel
> + How to use use tracepoint condition
> + How to use trace state variables
> + Simple trace state variables
> + Special trace state variables $current_task,
> + $current_thread_info, $cpu_id, $dump_stack, $printk_level,
> + $printk_format, $printk_tmp and $clock
> + Show all the traced data of current frame
> + Get backtrace info from Kernel
> + Howto let tracepoint output value directly
> + Output stack dump directly
> + Switch collect to output the value directly
> + Use printf command in actions
> + Get status of KGTP from Kernel
> + Set the trace buffer into a circular buffer
> + Do not stop tracepoint when the GDB disconnect
> + Howto show the variable that value of it is optimized
> + Linux kernel "Compile with almost no optimization" patch
> + Update your GCC
> + Offline debug
> +
> +
> +
> +
> +What is KGTP
> +------------
> +
> +KGTP is a realtime and lightweight Linux Kernel GDB debugger and tracer that
> +use Kprobe.
"uses Kprobes."
> +
> +It make Linux Kernel supply a GDB remote debug interface. Then GDB in current
It supplies the Linux Kernel with a GDB remote debug interface. ...
> +machine or remote machine(see "Make GDB connect to gtp") can debug Linux
> +through GDB tracepoint without stop the Linux Kernel.
without stopping the Linux Kernel.
> +And even if the board doesn't have GDB on it and doesn't have interface for
> +remote debug. It can debug the Linux Kernel use offline debug (See "Offline
using offline debug.
> +debug").
> +It support X86-32, X86-64, MIPS and ARM.
> +http://www.tudou.com/programs/view/_p6VTgxmCRA/ This is a video(in Chinese)
> +to show how to use it.
> +
> +
> +
> +
> +Report issue about KGTP
Report an issues about KGTP
> +-----------------------
> +You can post it in https://code.google.com/p/kgtp/issues/list or write Email
or write an email to ...
> +to [email protected].
> +
> +
> +
> +
> +Get info about GDB tracepoint
> +-----------------------------
> +Please goto http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
> +
> +
> +
> +
> +Get KGTP through http
> +---------------------
> +Please goto http://code.google.com/p/kgtp/downloads/list OR UPDATE to down
to download the package (?)
> +the package.
> +
> +
> +
> +
> +Get KGTP through svn
> +--------------------
> +Some people have trouble with access to KGTP website. You can access kgtp
> +through svn:
> +
> +------------------------------------------------------------
> +svn checkout http://kgtp.googlecode.com/svn/ kgtp-read-only
> +------------------------------------------------------------
> +
> +kgtp-read-only/tags/ There is the each release of KGTP.
This has each release of KGTP (?)
> +kgtp-read-only/trunk/ There is the main trunk of KGTP.
This is the main code repository of KGTP (?)
> +
> +
> +
> +
> +Config KGTP
> +-----------
> +
> +Before compile KGTP, you can choice which Kernel you want build with and
Before compiling KGTP, you can choose which kernel you want to build
with and
> +which compiler you want through change the Makefile. For example:
which compiler you want by changing the Makefile in your KGTP
repository. (?)
> +
> +-------------------------------------------
> +KERNELDIR := /lib/modules/`uname -r`/build
> +CROSS_COMPILE :=
> +-------------------------------------------
> +
> +KERNELDIR is set the directory which Kernel you want build for. Now it set to
KERELDIR is set to the directory which holds the kernel you want to
build for. By default, it is set to the kernel that you are running.
> +the current kernel that you use.
> +CROSS_COMPILE is set the compiler that you want to build the KGTP. Empty mean
> +use current compiler.
CROSS_COMPILE is set to the compiler you want to build KGTP. Leave empty
to compile with your default compiler.
> +ARCH is the architecture.
> +
> +------------------------------------------
> +KERNELDIR := /home/teawater/kernel/bamd64
> +CROSS_COMPILE :=x86_64-glibc_std-
> +ARCH := x86_64
> +------------------------------------------
> +
> +KERNELDIR is set to /home/teawater/kernel/bamd64. Compiler will
> +use x86_64-glibc_std-gcc.
> +
> +
> +
> +
> +Compile KGTP
> +------------
> +
> +For normal use:
> +
> +---------
> +cd kgtp/
> +make
> +---------
> +
> +If you want KGTP out the debug message,please use following (It is available
> +after 20100825):
I'm not sure what you mean by the above. Do you mean:
If you want KGTP to output debug messages, then us the following (....)
> +
> +---------
> +cd kgtp/
> +make D=1
> +---------
> +
> +
> +
> +
> +Install KGTP
> +------------
> +
> +------------------
> +cd kgtp/
> +sudo make install
> +------------------
> +
> +
> +
> +
> +Uninstall KGTP
> +--------------
> +
> +--------------------
> +cd kgtp/
> +sudo make uninstall
> +--------------------
> +
> +
> +
> +
> +Howto use
> +---------
> +
> +Exec it
> +-------
> +
> +If you had installed the KGTP in your system, you can:
> +
> +------------------
> +sudo modprobe gtp
> +------------------
> +
> +Or you can use the kgtp module in the directory.
> +
> +-------------------
> +cd kgtp/
> +sudo insmod gtp.ko
> +-------------------
> +
> +
> +
> +Make GDB connect to gtp
> +-----------------------
> +
> +In current machine:
On current machine.
Now it may be better to use "server" instead of current machine. I guess
you mean the man box the user is using.
> +
> +---------------------------------
> +sudo gdb ./vmlinux
> +(gdb) target remote /sys/kernel/debug/gtp
> +Remote debugging using /sys/kernel/debug/gtp
> +0x0000000000000000 in ?? ()
> +---------------------------------
> +
> +In remote machine:
On remote machine:
"target" may also be better, but I'm fine with "remote".
> +
> +---------------------------------------------
> +#Open the KGTP interface in current machine.
Now do you mean current == remote? I'm confused here. It is best to stay
consistent. Always use "remote" and always use "server".
> +sudo su
> +nc -l 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp
> +(nc -l -p 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp for old version
> +netcat.)
> +#Let gdb connect to the port 1234
> +gdb ./vmlinux
> +(gdb) target remote xxx.xxx.xxx.xxx:1234
You run gdb on the remote machine too?
> +---------------------------------------------
> +
> +
> +
> +Add module symbols to GDB
> +-------------------------
> +
> +Sometime, you need add the Linux Kernel module(lkm) symbols to GDB to debug it.
> +Following a example howto add ext3.ko's symbols to GDB:
The following example howto adds ext3.ko symbols to GDB:
> +
> +--------------------------------------------------------------------------------
> +cat /proc/modules | grep ext
> +ext3 116512 3 - Live 0xf9083000
> +#Get the address 0xf9083000.
> +modinfo ext3
> +filename: /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> +#Get the directory name of ext3.
> +(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> 0xf9083000
> +#Then, GDB get the symbols of ext3.
Now GDB has the symbols for ext3 (?)
> +--------------------------------------------------------------------------------
> +
> +You will see that it just add the text section info to GDB, sometime you need
just adds the ..., sometimes you need to add the info section of another
section. For example:
> +add another section info of other section, for example:
> +
> +--------------------------------------------------------------------------------
> +cat /sys/module/ext3/sections/.bss
> +0xf908170c
> +#Get the bss address 0xf908170c.
> +(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> 0xf9083000 -s .bss 0xf908170c
> +#Then, GDB get the symbols of ext3.
Now GDB has the .bss symbols for ext3 (?)
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Get GDB tracepoint commands
> +---------------------------
> +
> +Please goto http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
> +
> +
> +Get registers info from Kernel
> +------------------------------
> +
> +Following part is an example that record the value of all registers when Linux
> +Kernel call function "vfs_readdir".
The following is an example that records the value of all registers when
"vfs_readdir" is called.
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
Is this on the server or remote? Or do you mean that you can do this
from either one or the other.
Again, I'm a bit confused ;)
> +Tracepoint 1 at 0xc01a1ac0: file
> +/home/teawater/kernel/linux-2.6/fs/readdir.c, line 23.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +>collect $reg
> +>end
> +(gdb) tstart
> +(gdb) shell ls
I take it that this is run on the remote (target) box. I don't think
this would work on the server, would it?
> +(gdb) tstop
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 0xc01a1ac1 in vfs_readdir (file=0xc5528d00, filler=0xc01a1900 <filldir64>,
> + buf=0xc0d09f90) at /home/teawater/kernel/linux-2.6/fs/readdir.c:23
> +23 /home/teawater/kernel/linux-2.6/fs/readdir.c: No such file or
> directory.
> + in /home/teawater/kernel/linux-2.6/fs/readdir.c
> +(gdb) info reg
> +eax 0xc5528d00 -984445696
> +ecx 0xc0d09f90 -1060069488
> +edx 0xc01a1900 -1072031488
> +ebx 0xfffffff7 -9
> +esp 0xc0d09f8c 0xc0d09f8c
> +ebp 0x0 0x0
> +esi 0x8061480 134616192
> +edi 0xc5528d00 -984445696
> +eip 0xc01a1ac1 0xc01a1ac1 <vfs_readdir+1>
> +eflags 0x286 [ PF SF IF ]
> +cs 0x60 96
> +ss 0x8061480 134616192
> +ds 0x7b 123
> +es 0x7b 123
> +fs 0x0 0
> +gs 0x0 0
> +(gdb) tfind
> +Found trace frame 1, tracepoint 1
> +0xc01a1ac1 23 in /home/teawater/kernel/linux-2.6/fs/readdir.c
> +(gdb) info reg
> +eax 0xc5528d00 -984445696
> +ecx 0xc0d09f90 -1060069488
> +edx 0xc01a1900 -1072031488
> +ebx 0xfffffff7 -9
> +esp 0xc0d09f8c 0xc0d09f8c
> +ebp 0x0 0x0
> +esi 0x8061480 134616192
> +edi 0xc5528d00 -984445696
> +eip 0xc01a1ac1 0xc01a1ac1 <vfs_readdir+1>
> +eflags 0x286 [ PF SF IF ]
> +cs 0x60 96
> +ss 0x8061480 134616192
> +ds 0x7b 123
> +es 0x7b 123
> +fs 0x0 0
> +gs 0x0 0
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Get the value of variable from Kernel
> +-------------------------------------
> +
> +Following part is an example that record the value of "jiffies_64" when Linux
> +Kernel call function "vfs_readdir".
The following is an example that records the value of "jiffies_64" when
the function "vfs_readdir" is called:
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xc01ed740: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +>collect jiffies_64
> +>collect file->f_path.dentry->d_iname
> +>end
> +(gdb) tstart
> +(gdb) shell ls
> +arch drivers include kernel mm Module.symvers
> security System.map virt
> +block firmware init lib modules.builtin net
> sound t vmlinux
> +crypto fs ipc Makefile modules.order scripts
> source usr vmlinux.o
> +(gdb) tstop
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 0xc01ed741 in vfs_readdir (file=0xf4063000, filler=0xc01ed580
> <filldir64>, buf=0xd6dfdf90)
> + at /home/teawater/kernel/linux-2.6/fs/readdir.c:24
> +24 {
> +(gdb) p jiffies_64
> +$1 = 4297248706
> +(gdb) p file->f_path.dentry->d_iname
> +$1 = "b26", '\000' <repeats 28 times>
> +--------------------------------------------------------------------------------
> +
> +
> +
> +How to use use tracepoint condition
> +-----------------------------------
> +
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoint-Conditions.html
> +Like the breakpoint, we can set condition to tracepoint. But it speed is more
> +fast than breakpoint's condition because KGTP do all the condition check.
Like breakpoints, conditions can be set to tracepoints. The speed of
tracepoints is faster than breakpoints because KGTP can do all the
condition checks.
> +For example:
> +
> +------------------------------
> +(gdb) trace handle_irq
> +(gdb) condition 1 (irq == 47)
> +------------------------------
> +
> +This action of tracepoint 1 will work only when irq number is 47.
> +
> +
> +
> +How to use trace state variables
> +--------------------------------
> +
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Trace-State-Variables.html
> +Tracepoint have special variables. You can trace it or use it in tracepoint
> +condition.
Tracepoints have special variables. The variables can be traced
directly, or used in tracepoint conditions.
> +Note that only GDB 7.2.1 and later version support use trace state variables
Note that only GDB versions 7.2.1 and later support the sue of trace
state variables directly,..
> +directly, the old version GDB just can show the value of trace state variables
, the old version of GDB can show the value of trace ...
> +through command "info tvariables".
> +
> +
> +Simple trace state variables
> +----------------------------
> +
> +Define a trace state variable $c.
> +
> +-------------------
> +(gdb) tvariable $c
> +-------------------
> +
> +Trace state variable $c created, with initial value 0.
... variable $c is created with initial value 0.
> +Use it in the action. Follow action will use $c to count how much irq happen
> +in Kernel.
The following action uses $c to count how many irqs happened in the
Kernel.
> +
> +-----------------------------------------------------------------------
> +(gdb) trace handle_irq
> +(gdb) actions
> +Enter actions for tracepoint 3, one per line.
> +End with a line saying just "end".
> +>collect $c #Save current value of $c to the trace frame buffer.
> +>teval $c=$c+1 #Increase the $c.
> +>end
> +-----------------------------------------------------------------------
> +
> +You can get the current value of $c when the trace is running or stop.
... of $c while the trace is running or stopped.
> +
> +----------------------------------
> +(gdb) tstart
> +(gdb) info tvariables
> +$c 0 31554
> +(gdb) p $c
> +$5 = 33652
> +(gdb) tstop
> +(gdb) p $c
> +$9 = 105559
> +----------------------------------
> +
> +When use the tfind parse the trace frame buffer, if the value of trace state
> +variable is collect. You can use it.
I do not understand the above at all.
> +
> +------------------------------
> +(gdb) tstop
> +(gdb) tfind
> +(gdb) info tvariables
> +$c 0 0
> +(gdb) p $c
> +$6 = 0
> +(gdb) tfind 100
> +(gdb) p $c
> +$7 = 100
> +------------------------------
Nor do I understand the above example.
> +
> +
> +Special trace state variables $current_task, $current_thread_info, $cpu_id,
> +$dump_stack, $printk_level, $printk_format, $printk_tmp and $clock
> +--------------------------------------------------------------------------
> +
> +KGTP have special trace state variables $current_task, $current_thread_info,
KGTP has special ...
> +$cpu_id and $clock can very easy to access to some special value. You can see
... $clock that can be used to access their special values. (?)
> +them when GDB connect to the KGTP. You can use them in tracepoint condition
connects conditions
> +or actions.
> +Access $current_task in tracepoint condition and action will get the return
> +of get_current().
The use of $current_task in tracepoint conditions will return the action
of get_current().
> +Access $current_thread_info in tracepoint condition and action will get the
> +return of current_thread_info().
Same
> +Access $cpu_id in tracepoint condition and action will get the return of
> +smp_processor_id().
Same
> +Access $clock in tracepoint condition and action will get the return of
> +local_clock() that return the timestamp in nanoseconds.
Same
> +
> +And KGTP have other special trace state variables $dump_stack, $printk_level,
KGTP has other special trace state variables ...
> +$printk_format and $printk_tmp, all of them are for output value directly that
$print_tmp. Their output is explained in
"Howto ..."
> +will introduce in "Howto let tracepoint output value directly".
> +
> +Following example will count process 16663 call how many sys_read in $c
> +and collect the struct thread_info of current task:
I'm confused by what $c is to give it a proper translation.
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_read if ((*(struct task_struct *)$current_task)->pid == 16663)
> +(gdb) tvariable $c
> +(gdb) actions
> +Enter actions for tracepoint 4, one per line.
> +End with a line saying just "end".
> +>teval $c=$c+1
> +>collect (*(struct thread_info *)$current_thread_info)
> +>end
> +(gdb) tstart
> +(gdb) info tvariables
> +Name Initial Current
> +$c 0 184
> +$current_task 0 <unknown>
> +$current_thread_info 0 <unknown>
> +$cpu_id 0 <unknown>
> +(gdb) tstop
> +(gdb) tfind
> +(gdb) p *(struct thread_info *)$current_thread_info
> +$10 = {task = 0xf0ac6580, exec_domain = 0xc07b1400, flags = 0, status
> = 0, cpu = 1, preempt_count = 2, addr_limit = {
> + seg = 4294967295}, restart_block = {fn = 0xc0159fb0
> <do_no_restart_syscall>, {{arg0 = 138300720, arg1 = 11,
> + arg2 = 1, arg3 = 78}, futex = {uaddr = 0x83e4d30, val = 11,
> flags = 1, bitset = 78, time = 977063750,
> + uaddr2 = 0x0}, nanosleep = {index = 138300720, rmtp = 0xb,
> expires = 335007449089}, poll = {
> + ufds = 0x83e4d30, nfds = 11, has_timeout = 1, tv_sec = 78,
> tv_nsec = 977063750}}},
> + sysenter_return = 0xb77ce424, previous_esp = 0, supervisor_stack =
> 0xef340044 "", uaccess_err = 0}
> +--------------------------------------------------------------------------------
This is all I have time for this now, but this work looks very
promising. When I get some more time, I will have to start playing with
it.
Thanks!
-- Steve
On Mon, 25 Apr 2011 10:42:48 -0400 Steven Rostedt wrote:
> On Sun, 2011-04-24 at 22:28 +0800, Hui Zhu wrote:
>
>
> There is several grammar mistakes, I'll correct those here that caused
> me to have trouble understanding what you were saying. There's more
> mistakes that I'm not correcting because I still understand what you
> meant. I'll let Randy correct those, as he can come up with better
> sentences than I can.
I tried (see separate email).
> Do not take this as an insult, I have an utmost respect for those that
> communicate on LKML in a language that is not their own mother tongue.
> And I also understand that the Asian languages are even more different
> than English that it makes it 10 times more difficult to get it right
> (as suppose to those that speak German).
Absolutely.
---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
On Sun, 24 Apr 2011 22:28:13 +0800 Hui Zhu wrote:
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1253,6 +1253,15 @@ config ASYNC_RAID6_TEST
>
> If unsure, say N.
>
> +config GTP
> + tristate "GDB tracepoint support"
> + depends on X86 || ARM || MIPS
> + depends on KPROBES
> + depends on DEBUG_FS
> + ---help---
> + Supply GDB tracepoint interface in /sys/kernel/debug/gtp.
> + See https://code.google.com/p/kgtp/wiki/HOWTO
Align the 2 help lines by using tab + 2 spaces on them.
Also, the second line (URL) is duplicated in this patch, so consider something
like the following:
help
Supply GDB tracepoint interface in /sys/kernel/debug/gtp.
See Documentation/trace/gtp.txt for more info, or
https://code.google.com/p/kgtp/wiki/HOWTO may contain more
current information.
> +
> source "samples/Kconfig"
>
> source "lib/Kconfig.kgdb"
> --- /dev/null
> +++ b/Documentation/trace/gtp.txt
> @@ -0,0 +1,873 @@
> + Linux Kernel GDB tracepoint module (KGTP)
> + =========================================
> + By Hui Zhu <[email protected]>
> + https://code.google.com/p/kgtp/wiki/HOWTO
> + 2011-04-24
> +
> +Table of contents
> +-----------------
> +
> +What is KGTP
> +Report issue about KGTP
issues
> +Get info about GDB tracepoint
> +Get KGTP through http
> +Get KGTP through svn
> +Config KGTP
> +Compile KGTP
> +Install KGTP
> +Uninstall KGTP
> +Howto use
> + Exec it
> + Make GDB connect to gtp
> + Add module symbols to GDB
> + Get GDB tracepoint commands
> + Get registers info from Kernel
Get register info from Kernel
> + Get the value of variable from Kernel
> + How to use use tracepoint condition
> + How to use trace state variables
> + Simple trace state variables
> + Special trace state variables $current_task,
> + $current_thread_info, $cpu_id, $dump_stack, $printk_level,
> + $printk_format, $printk_tmp and $clock
> + Show all the traced data of current frame
> + Get backtrace info from Kernel
> + Howto let tracepoint output value directly
Howto get
> + Output stack dump directly
> + Switch collect to output the value directly
> + Use printf command in actions
> + Get status of KGTP from Kernel
> + Set the trace buffer into a circular buffer
> + Do not stop tracepoint when the GDB disconnect
when GDB is disconnected
> + Howto show the variable that value of it is optimized
Howto show a variable whose value has been optimized away
> + Linux kernel "Compile with almost no optimization" patch
> + Update your GCC
> + Offline debug
> +
> +
> +
> +
> +What is KGTP
> +------------
> +
> +KGTP is a realtime and lightweight Linux Kernel GDB debugger and tracer that
> +use Kprobe.
uses Kprobes.
> +
> +It make Linux Kernel supply a GDB remote debug interface. Then GDB in current
It makes
> +machine or remote machine(see "Make GDB connect to gtp") can debug Linux
machine (see
> +through GDB tracepoint without stop the Linux Kernel.
stopping
> +And even if the board doesn't have GDB on it and doesn't have interface for
> +remote debug. It can debug the Linux Kernel use offline debug (See "Offline
debug, it can debug the Linux Kernel using offline
> +debug").
> +It support X86-32, X86-64, MIPS and ARM.
supports
> +http://www.tudou.com/programs/view/_p6VTgxmCRA/ This is a video(in Chinese)
video (in Chinese)
> +to show how to use it.
> +
> +
> +
> +
> +Report issue about KGTP
issues
> +-----------------------
> +You can post it in https://code.google.com/p/kgtp/issues/list or write Email
> +to [email protected].
> +
> +
> +
> +
> +Get info about GDB tracepoint
> +-----------------------------
> +Please goto http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
> +
> +
> +
> +
> +Get KGTP through http
> +---------------------
> +Please goto http://code.google.com/p/kgtp/downloads/list OR UPDATE to down
download
> +the package.
> +
> +
> +
> +
> +Get KGTP through svn
> +--------------------
> +Some people have trouble with access to KGTP website. You can access kgtp
> +through svn:
> +
> +------------------------------------------------------------
> +svn checkout http://kgtp.googlecode.com/svn/ kgtp-read-only
> +------------------------------------------------------------
> +
> +kgtp-read-only/tags/ There is the each release of KGTP.
(maybe this?)
Present for each release of KGTP.
> +kgtp-read-only/trunk/ There is the main trunk of KGTP.
Present for the main trunk of KGTP.
> +
> +
> +
> +
> +Config KGTP
> +-----------
> +
> +Before compile KGTP, you can choice which Kernel you want build with and
compiling KGTP, you can choose
> +which compiler you want through change the Makefile. For example:
by making changes to the Makefile. For example:
> +
> +-------------------------------------------
> +KERNELDIR := /lib/modules/`uname -r`/build
> +CROSS_COMPILE :=
> +-------------------------------------------
> +
> +KERNELDIR is set the directory which Kernel you want build for. Now it set to
set to the directory of the Kernel that you want to build for.
Now it is set to the current kernel that is running.
> +the current kernel that you use.
> +CROSS_COMPILE is set the compiler that you want to build the KGTP. Empty mean
is set to the compiler that you want to use to build the KGTP.
Empty means to use the current compiler.
> +use current compiler.
> +ARCH is the architecture.
> +
> +------------------------------------------
> +KERNELDIR := /home/teawater/kernel/bamd64
> +CROSS_COMPILE :=x86_64-glibc_std-
> +ARCH := x86_64
> +------------------------------------------
> +
> +KERNELDIR is set to /home/teawater/kernel/bamd64. Compiler will
> +use x86_64-glibc_std-gcc.
> +
> +
> +
> +
> +Compile KGTP
> +------------
> +
> +For normal use:
> +
> +---------
> +cd kgtp/
> +make
> +---------
> +
> +If you want KGTP out the debug message,please use following (It is available
to output debug messages, please
> +after 20100825):
> +
> +---------
> +cd kgtp/
> +make D=1
> +---------
> +
> +
> +
> +
> +Install KGTP
> +------------
> +
> +------------------
> +cd kgtp/
> +sudo make install
> +------------------
> +
> +
> +
> +
> +Uninstall KGTP
> +--------------
> +
> +--------------------
> +cd kgtp/
> +sudo make uninstall
> +--------------------
> +
> +
> +
> +
> +Howto use
> +---------
> +
> +Exec it
> +-------
> +
> +If you had installed the KGTP in your system, you can:
have installed KGTP in
> +
> +------------------
> +sudo modprobe gtp
> +------------------
> +
> +Or you can use the kgtp module in the directory.
> +
> +-------------------
> +cd kgtp/
> +sudo insmod gtp.ko
> +-------------------
> +
> +
> +
> +Make GDB connect to gtp
> +-----------------------
> +
> +In current machine:
> +
> +---------------------------------
> +sudo gdb ./vmlinux
> +(gdb) target remote /sys/kernel/debug/gtp
> +Remote debugging using /sys/kernel/debug/gtp
> +0x0000000000000000 in ?? ()
> +---------------------------------
> +
> +In remote machine:
> +
> +---------------------------------------------
> +#Open the KGTP interface in current machine.
> +sudo su
Are both of those needed?
> +nc -l 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp
> +(nc -l -p 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp for old version
> +netcat.)
> +#Let gdb connect to the port 1234
> +gdb ./vmlinux
> +(gdb) target remote xxx.xxx.xxx.xxx:1234
> +---------------------------------------------
> +
> +
> +
> +Add module symbols to GDB
> +-------------------------
> +
> +Sometime, you need add the Linux Kernel module(lkm) symbols to GDB to debug it.
Sometimes you need to add a Linux kernel module's symbols to GDB to debug it.
> +Following a example howto add ext3.ko's symbols to GDB:
Following is an example of howto add ext.ko's symbols to GDB:
> +
> +--------------------------------------------------------------------------------
> +cat /proc/modules | grep ext
> +ext3 116512 3 - Live 0xf9083000
> +#Get the address 0xf9083000.
> +modinfo ext3
> +filename: /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> +#Get the directory name of ext3.
> +(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> 0xf9083000
> +#Then, GDB get the symbols of ext3.
> +--------------------------------------------------------------------------------
> +
> +You will see that it just add the text section info to GDB, sometime you need
adds GDB. Sometimes you need
> +add another section info of other section, for example:
to add section info of another section, for example:
> +
> +--------------------------------------------------------------------------------
> +cat /sys/module/ext3/sections/.bss
> +0xf908170c
> +#Get the bss address 0xf908170c.
> +(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
> 0xf9083000 -s .bss 0xf908170c
> +#Then, GDB get the symbols of ext3.
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Get GDB tracepoint commands
> +---------------------------
> +
> +Please goto http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
> +
> +
> +Get registers info from Kernel
register info
> +------------------------------
> +
> +Following part is an example that record the value of all registers when Linux
records
> +Kernel call function "vfs_readdir".
calls
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xc01a1ac0: file
> +/home/teawater/kernel/linux-2.6/fs/readdir.c, line 23.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +>collect $reg
> +>end
> +(gdb) tstart
> +(gdb) shell ls
> +(gdb) tstop
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 0xc01a1ac1 in vfs_readdir (file=0xc5528d00, filler=0xc01a1900 <filldir64>,
> + buf=0xc0d09f90) at /home/teawater/kernel/linux-2.6/fs/readdir.c:23
> +23 /home/teawater/kernel/linux-2.6/fs/readdir.c: No such file or
> directory.
> + in /home/teawater/kernel/linux-2.6/fs/readdir.c
> +(gdb) info reg
> +eax 0xc5528d00 -984445696
> +ecx 0xc0d09f90 -1060069488
> +edx 0xc01a1900 -1072031488
> +ebx 0xfffffff7 -9
> +esp 0xc0d09f8c 0xc0d09f8c
> +ebp 0x0 0x0
> +esi 0x8061480 134616192
> +edi 0xc5528d00 -984445696
> +eip 0xc01a1ac1 0xc01a1ac1 <vfs_readdir+1>
> +eflags 0x286 [ PF SF IF ]
> +cs 0x60 96
> +ss 0x8061480 134616192
> +ds 0x7b 123
> +es 0x7b 123
> +fs 0x0 0
> +gs 0x0 0
> +(gdb) tfind
> +Found trace frame 1, tracepoint 1
> +0xc01a1ac1 23 in /home/teawater/kernel/linux-2.6/fs/readdir.c
> +(gdb) info reg
> +eax 0xc5528d00 -984445696
> +ecx 0xc0d09f90 -1060069488
> +edx 0xc01a1900 -1072031488
> +ebx 0xfffffff7 -9
> +esp 0xc0d09f8c 0xc0d09f8c
> +ebp 0x0 0x0
> +esi 0x8061480 134616192
> +edi 0xc5528d00 -984445696
> +eip 0xc01a1ac1 0xc01a1ac1 <vfs_readdir+1>
> +eflags 0x286 [ PF SF IF ]
> +cs 0x60 96
> +ss 0x8061480 134616192
> +ds 0x7b 123
> +es 0x7b 123
> +fs 0x0 0
> +gs 0x0 0
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Get the value of variable from Kernel
> +-------------------------------------
> +
> +Following part is an example that record the value of "jiffies_64" when Linux
records
> +Kernel call function "vfs_readdir".
calls
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xc01ed740: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +>collect jiffies_64
> +>collect file->f_path.dentry->d_iname
> +>end
> +(gdb) tstart
> +(gdb) shell ls
> +arch drivers include kernel mm Module.symvers
> security System.map virt
> +block firmware init lib modules.builtin net
> sound t vmlinux
> +crypto fs ipc Makefile modules.order scripts
> source usr vmlinux.o
> +(gdb) tstop
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 0xc01ed741 in vfs_readdir (file=0xf4063000, filler=0xc01ed580
> <filldir64>, buf=0xd6dfdf90)
> + at /home/teawater/kernel/linux-2.6/fs/readdir.c:24
> +24 {
> +(gdb) p jiffies_64
> +$1 = 4297248706
> +(gdb) p file->f_path.dentry->d_iname
> +$1 = "b26", '\000' <repeats 28 times>
> +--------------------------------------------------------------------------------
> +
> +
> +
> +How to use use tracepoint condition
> +-----------------------------------
> +
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoint-Conditions.html
> +Like the breakpoint, we can set condition to tracepoint. But it speed is more
Like breakpoints, we can set conditions on tracepoints. But its speed is
> +fast than breakpoint's condition because KGTP do all the condition check.
faster than breakpoint conditions because KGTP does all of the condition checks.
> +For example:
> +
> +------------------------------
> +(gdb) trace handle_irq
> +(gdb) condition 1 (irq == 47)
> +------------------------------
> +
> +This action of tracepoint 1 will work only when irq number is 47.
> +
> +
> +
> +How to use trace state variables
> +--------------------------------
> +
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Trace-State-Variables.html
> +Tracepoint have special variables. You can trace it or use it in tracepoint
Tracepoints have trace them or use them in
> +condition.
conditions.
> +Note that only GDB 7.2.1 and later version support use trace state variables
later versions support trace state variables
> +directly, the old version GDB just can show the value of trace state variables
directly; the older GDB versions can just show the value of
> +through command "info tvariables".
> +
> +
> +Simple trace state variables
> +----------------------------
> +
> +Define a trace state variable $c.
> +
> +-------------------
> +(gdb) tvariable $c
> +-------------------
> +
> +Trace state variable $c created, with initial value 0.
> +Use it in the action. Follow action will use $c to count how much irq happen
The following action uses $c to count how much irqs happen
> +in Kernel.
> +
> +-----------------------------------------------------------------------
> +(gdb) trace handle_irq
> +(gdb) actions
> +Enter actions for tracepoint 3, one per line.
> +End with a line saying just "end".
> +>collect $c #Save current value of $c to the trace frame buffer.
> +>teval $c=$c+1 #Increase the $c.
> +>end
> +-----------------------------------------------------------------------
> +
> +You can get the current value of $c when the trace is running or stop.
> +
> +----------------------------------
> +(gdb) tstart
> +(gdb) info tvariables
> +$c 0 31554
> +(gdb) p $c
> +$5 = 33652
> +(gdb) tstop
> +(gdb) p $c
> +$9 = 105559
> +----------------------------------
> +
> +When use the tfind parse the trace frame buffer, if the value of trace state
> +variable is collect. You can use it.
Maybe this?
When using tfind, you can parse the trace frame buffer. If the value of a trace state
variable is collected, you can use it.
> +
> +------------------------------
> +(gdb) tstop
> +(gdb) tfind
> +(gdb) info tvariables
> +$c 0 0
> +(gdb) p $c
> +$6 = 0
> +(gdb) tfind 100
> +(gdb) p $c
> +$7 = 100
> +------------------------------
> +
> +
> +Special trace state variables $current_task, $current_thread_info, $cpu_id,
> +$dump_stack, $printk_level, $printk_format, $printk_tmp and $clock
> +--------------------------------------------------------------------------
> +
> +KGTP have special trace state variables $current_task, $current_thread_info,
drop "have"
> +$cpu_id and $clock can very easy to access to some special value. You can see
> +them when GDB connect to the KGTP. You can use them in tracepoint condition
connects conditions
> +or actions.
> +Access $current_task in tracepoint condition and action will get the return
> +of get_current().
> +Access $current_thread_info in tracepoint condition and action will get the
> +return of current_thread_info().
> +Access $cpu_id in tracepoint condition and action will get the return of
> +smp_processor_id().
> +Access $clock in tracepoint condition and action will get the return of
> +local_clock() that return the timestamp in nanoseconds.
that returns
> +
> +And KGTP have other special trace state variables $dump_stack, $printk_level,
has
> +$printk_format and $printk_tmp, all of them are for output value directly that
$printk_tmp. All of them output their values directly, as
> +will introduce in "Howto let tracepoint output value directly".
can be seen in "Howto get tracepoint output values directly".
> +
> +Following example will count process 16663 call how many sys_read in $c
The following example counts in $c how many sys_read calls that process 16663 does
> +and collect the struct thread_info of current task:
and collects
but I don't see it qualifies these traces with "sys_read".
Should it be vfs_read instead? or you are just equating sys_read -> vfs_read?
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_read if ((*(struct task_struct *)$current_task)->pid == 16663)
> +(gdb) tvariable $c
> +(gdb) actions
> +Enter actions for tracepoint 4, one per line.
> +End with a line saying just "end".
> +>teval $c=$c+1
> +>collect (*(struct thread_info *)$current_thread_info)
> +>end
> +(gdb) tstart
> +(gdb) info tvariables
> +Name Initial Current
> +$c 0 184
> +$current_task 0 <unknown>
> +$current_thread_info 0 <unknown>
> +$cpu_id 0 <unknown>
> +(gdb) tstop
> +(gdb) tfind
> +(gdb) p *(struct thread_info *)$current_thread_info
> +$10 = {task = 0xf0ac6580, exec_domain = 0xc07b1400, flags = 0, status
> = 0, cpu = 1, preempt_count = 2, addr_limit = {
> + seg = 4294967295}, restart_block = {fn = 0xc0159fb0
> <do_no_restart_syscall>, {{arg0 = 138300720, arg1 = 11,
> + arg2 = 1, arg3 = 78}, futex = {uaddr = 0x83e4d30, val = 11,
> flags = 1, bitset = 78, time = 977063750,
> + uaddr2 = 0x0}, nanosleep = {index = 138300720, rmtp = 0xb,
> expires = 335007449089}, poll = {
> + ufds = 0x83e4d30, nfds = 11, has_timeout = 1, tv_sec = 78,
> tv_nsec = 977063750}}},
> + sysenter_return = 0xb77ce424, previous_esp = 0, supervisor_stack =
> 0xef340044 "", uaccess_err = 0}
> +--------------------------------------------------------------------------------
> +
> +nother example can show how much sys_read() execute in each cpu.
Another example shows how much sys_read() executes in each CPU.
> +
> +--------------------------------------
> +tvariable $c0
> +tvariable $c1
> +trace sys_read
> + condition $bpnum ($cpu_id == 0)
> + commands
> + teval $c0=$c0+1
> + end
> +trace sys_read
> + condition $bpnum ($cpu_id == 1)
> + commands
> + teval $c1=$c1+1
> + end
> +info tvariables
> +Name Initial Current
> +$current_task 0 <unknown>
> +$cpu_id 0 <unknown>
> +$c0 0 3255
> +$c1 0 1904
> +--------------------------------------
> +
> +sys_read() execute 3255 times in cpu0 and 1904 times in cpu1.
> +
> +
> +
> +Show all the traced data of current frame
> +-----------------------------------------
> +
> +--------------------------------------------------------------------------------
> +(gdb) tdump
> +Data collected at tracepoint 1, trace frame 0:
> +$cr = void
> +file->f_path.dentry->d_iname =
> "gtp\000.google.chrome.g05ZYO\000\235", <incomplete sequence \364>
> +jiffies_64 = 4319751455
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Get backtrace info from Kernel
> +------------------------------
> +
> +We can get the backtrace through collect the stack.
We can get a backtrace by collecting the stack.
> +In x86_32, following action command will collect 512 bytes of stack.
> +
> +-----------------------------------
> +collect *(unsigned char *)$esp@512
> +-----------------------------------
> +
> +In x86_64, following command will collect 512 bytes of stack.
> +
> +-----------------------------------
> +collect *(unsigned char *)$rsp@512
> +-----------------------------------
> +
> +In MIPS or ARM, following command will collect 512 bytes of stack.
> +----------------------------------
> +collect *(unsigned char *)$sp@512
> +-----------------------------------
> +
> +Following part is an example about howto backtrace in x86_64:
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xffffffff8113f7fc: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +>collect *(unsigned char *)$rsp@512
> +>end
> +(gdb) tstart
> +(gdb) shell ls
> +2 block firmware i ipc Makefile
> modules.order scripts source t~ vmlinux
> +a.out crypto fs include kernel mm
> Module.symvers security System.map usr vmlinux.o
> +arch drivers gdb.txt init lib modules.builtin net
> sound t virt
> +(gdb) tstop
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 0xffffffff8113f7fd in vfs_readdir (file=0xffff880075f00780,
> filler=0xffffffff8113f630 <filldir>, buf=0xffff880005785f38)
> + at ./linux-2.6/fs/readdir.c:24
> +24 {
> +(gdb) bt
> +#0 0xffffffff8113f7fd in vfs_readdir (file=0xffff880075f00780,
> filler=0xffffffff8113f630 <filldir>, buf=0xffff880005785f38)
> + at ./linux-2.6/fs/readdir.c:24
> +#1 0xffffffff8113fa14 in sys_getdents (fd=<value optimized out>,
> dirent=0x801108, count=32768)
> + at ./linux-2.6/fs/readdir.c:214
> +#2 0xffffffff8100af42 in ?? () at ./linux-2.6/arch/x86/kernel/entry_64.S:487
> +--------------------------------------------------------------------------------
> +
> +
> +
> +Howto let tracepoint output value directly
Howto get (?: makes more sense to me)
> +------------------------------------------
> +
Maybe:
> +In the previous parts, you can get that to get the value from Linux Kernel you
you may understand that to get a value from Linux kernel, you
> +need use tracepoint action "collect" save value to the tracepoint frame and
need to use a tracepoint "collect" action to save the value to the tracepoint frame and
> +use GDB command "tfind" parse the the value out from the frame.
use the GDB command "tfind" to parse the value from the frame data.
> +But we want get the value directly sometime, so KGTP support two ways to output
sometimes, supports
> +value directly.
values
> +
> +
> +Output stack dump directly
> +--------------------------
> +KGTP have special trace state variables $dump_stack, "collect" it will let
has variable ;
> +Linux Kernel output stack dump directly.
> +
> +Following example let Linux Kernel show the stack dump of vfs_readdir:
lets
> +
> +--------------------------------------------------------------------------------
> +trace vfs_readdir
> + commands
> + collect $dump_stack
> + end
> +--------------------------------------------------------------------------------
> +
> +Then your kernel will printk like:
> +
> +--------------------------------------------------------------------------------
> +[22779.208064] gtp 1:Pid: 441, comm: python Not tainted 2.6.39-rc3+ #46
> +[22779.208068] Call Trace:
> +[22779.208072] [<fe653cca>] gtp_get_var+0x4a/0xa0 [gtp]
> +[22779.208076] [<fe653d79>] gtp_collect_var+0x59/0xa0 [gtp]
> +[22779.208080] [<fe655974>] gtp_action_x+0x1bb4/0x1dc0 [gtp]
> +[22779.208084] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
> +[22779.208088] [<c023f152>] ? __find_get_block_slow+0xd2/0x160
> +[22779.208091] [<c01a8c56>] ? delayacct_end+0x96/0xb0
> +[22779.208100] [<c023f404>] ? __find_get_block+0x84/0x1d0
> +[22779.208103] [<c05b6408>] ? _raw_spin_unlock+0x18/0x40
> +[22779.208106] [<c02e0838>] ? find_revoke_record+0xa8/0xc0
> +[22779.208109] [<c02e0c45>] ? jbd2_journal_cancel_revoke+0xd5/0xe0
> +[22779.208112] [<c02db51f>] ? __jbd2_journal_temp_unlink_buffer+0x2f/0x110
> +[22779.208115] [<fe655c4c>] gtp_kp_pre_handler+0xcc/0x1c0 [gtp]
> +[22779.208118] [<c05b8a88>] kprobe_exceptions_notify+0x3d8/0x440
> +[22779.208121] [<c05b7d54>] ? hw_breakpoint_exceptions_notify+0x14/0x180
> +[22779.208124] [<c05b95eb>] ? sub_preempt_count+0x7b/0xb0
> +[22779.208126] [<c0227ac5>] ? vfs_readdir+0x15/0xb0
> +[22779.208128] [<c0227ac4>] ? vfs_readdir+0x14/0xb0
> +[22779.208131] [<c05b9743>] notifier_call_chain+0x43/0x60
> +[22779.208134] [<c05b9798>] __atomic_notifier_call_chain+0x38/0x50
> +[22779.208137] [<c05b97cf>] atomic_notifier_call_chain+0x1f/0x30
> +[22779.208140] [<c05b980d>] notify_die+0x2d/0x30
> +[22779.208142] [<c05b71c5>] do_int3+0x35/0xa0
> +--------------------------------------------------------------------------------
> +
> +
> +Switch collect to output the value directly
> +-------------------------------------------
> +
> +KGTP have special trace state variables $printk_level, $printk_format
has
> +and $printk_tmp to support this function.
> +
> +$printk_level, if its value is 8 (this is the default value), "collect" will
$printk_level:
> +save value to the tracepoint frame.
will save what value to the tracepoint frame??
> +If its value is 0-7, "collect" will output the value through "printk" directly,
> +and value will be the level of printk. The level is:
> +0 KERN_EMERG system is unusable
> +1 KERN_ALERT action must be taken immediately
> +2 KERN_CRIT critical conditions
> +3 KERN_ERR error conditions
> +4 KERN_WARNING warning conditions
> +5 KERN_NOTICE normal but significant condition
> +6 KERN_INFO informational
> +7 KERN_DEBUG debug-level messages
> +
> +$printk_format, collect printk will output value in the format that set by it.
that is set by it.
> +The format is:
> +0 This is the default value.
> + If the size of collect value is 1, 2, 4 or 8, it will be outputted as
output as
> + a unsigned decimal.
an unsigned decimal.
> + If not, it will be outputted as a hexadecimal string.
output
> +1 Output value in signed decimal.
> +2 Output value in unsigned decimal.
> +3 Output value in unsigned hexadecimal.
> +4 Output value as a string.
> +5 Output value as a hexadecimal string.
> +
> +$printk_tmp, to output the value of global variable need set to it first.
> +
> +Following example show the a count number, pid, jiffies_64 and the file name
shows a count number, ...
> +that call vfs_readdir:
> +
> +--------------------------------------------------------------------------------
> +tvariable $c
> +trace vfs_readdir
> + commands
> + teval $printk_level=0
> + collect $c=$c+1
> + collect (*(struct task_struct *)$current_task)->pid
> + collect $printk_tmp=jiffies_64
> + teval $printk_format=4
> + collect file->f_path.dentry->d_iname
> + end
> +--------------------------------------------------------------------------------
> +
> +Then your kernel will printk like:
> +
> +--------------------------------------------------------------------------------
> +gtp 1:$c=$c+1=41
> +gtp 1:(*(struct task_struct *)$current_task)->pid=12085
> +gtp 1:$printk_tmp=jiffies_64=4322021438
> +gtp 1:file->f_path.dentry->d_iname=b26
> +gtp 1:$c=$c+1=42
> +gtp 1:(*(struct task_struct *)$current_task)->pid=12085
> +gtp 1:$printk_tmp=jiffies_64=4322021438
> +gtp 1:file->f_path.dentry->d_iname=b26
> +--------------------------------------------------------------------------------
> +
> +"gtp 1" mean that it output by tracepoint 1.
means that it was output by tracepoint 1.
> +
> +
> +Use printf command in actions
> +-----------------------------
> +
> +This way have a trouble is GDB is still not accept the patch that make
This method has a proble: GDB still has not accepted the patch that makes
> +tracepoint support printf, So if you want use it, you need patch the patch in
tracepoints support printf, so if you want to use it, you need to apply the patch in
> +http://sourceware.org/ml/gdb-patches/2011-03/msg00022.html and build your
> +GDB with yourself.
GDB yourself.
> +
> +Following example show the a count number, pid and the file name that call
Following example shows a count number, ...
> +vfs_readdir:
> +
> +--------------------------------------------------------------------------------
> +tvariable $c
> +trace vfs_readdir
> + commands
> + printf "<0>%d pid=%d name:%s\n", $c=$c+1, (*(struct task_struct
> *)$current_task)->pid, file->f_path.dentry->d_iname
> + end
> +--------------------------------------------------------------------------------
> +
> +Then your kernel will printk like:
> +
> +--------------------------------------------------------------------------------
> +1 pid=10888 name:bin
> +2 pid=10888 name:bin
> +3 pid=10893 name:teawater
> +4 pid=10893 name:teawater
> +--------------------------------------------------------------------------------
> +
> +Like what we use printk in Linux Kernel, please add kernel loglevel
use with printk in
> in the begin
at the beginning
> +and add "\n" in the end.
> +The kernel loglevel is:
> +KERN_EMERG "<0>" system is unusable
> +KERN_ALERT "<1>" action must be taken immediately
> +KERN_CRIT "<2>" critical conditions
> +KERN_ERR "<3>" error conditions
> +KERN_WARNING "<4>" warning conditions
> +KERN_NOTICE "<5>" normal but significant condition
> +KERN_INFO "<6>" informational
> +KERN_DEBUG "<7>" debug-level messages
> +
> +
> +
> +Get status of KGTP from Kernel
> +------------------------------
> +Please use GDB command "tstatus"
> +
> +
> +
> +Set the trace buffer into a circular buffer
> +-------------------------------------------
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Starting-and-Stopping-Trace-Experiments.html
> +The frame buffer is not a circular buffer by default. When the buffer is full,
> +the tracepoint will stop.
> +
> +-----------------------------
> +set circular-trace-buffer on
> +-----------------------------
> +
> +Set frame buffer to a circular buffer. When the buffer is full, it will auto
> +discard traceframes (oldest first) and keep trace.
> +
> +
> +
> +Do not stop tracepoint when the GDB disconnect
GDB disconnects
> +----------------------------------------------
> +
> +http://sourceware.org/gdb/current/onlinedocs/gdb/Starting-and-Stopping-Trace-Experiments.html
> +The KGTP will stop and delete the trace frame when GDB disconnect with it by
KGTP will stop and ... disconnects
> +default.
> +
> +----------------------------
> +set disconnected-tracing on
> +----------------------------
> +will open the KGTP disconnect-trace. After that, when GDB disconnect with KGTP,
disconnects
> +KGTP will not stop trace. And after GDB reconnect to KGTP, it can keep control
reconnects
> +the KGTP like nothing happen.
of KGTP like nothing happened.
> +
> +
> +
> +Howto show the variable that value of it is optimized
Howto show a variable whose value has been optimized away
> +-----------------------------------------------------
> +
> +Sometimes, GDB will output some value like:
> +
> +-------------------------------------------
> +inode has been optimized out of existence.
> +res has been optimized out of existence.
> +-------------------------------------------
> +
> +That is because value of inode and res is optimized. Linux Kernel is built
> +with -O2 so you will get this trouble sometimes.
> +There are 2 ways to handle it:
> +
> +Linux kernel "Compile with almost no optimization" patch
> +--------------------------------------------------------
> +If you do not care about the speed when you debug the Kernel, you can use the
> +patch for Linux Kernel in
> +http://code.google.com/p/kgtp/downloads/detail?name=co.patch It add a option
an option
> +in "Kernel hacking" called "Compile with almost no optimization". It will make
> +kernel be built without -O2. It support x86_32, x86_64 and arm.
> +
> +Update your GCC
> +---------------
> +The VTA branch(http://gcc.gnu.org/wiki/Var_Tracking_Assignments) was merged
branch (http:// ...
> +for GCC 4.5 Which helps a lot with generating dwarf for previously
for GCC 4.5. This helps a lot ...
> +"optimized out" values.
> +
> +
> +
> +Offline debug
> +-------------
> +
> +In the PC that can run the GDB:
> +Change the "target remote XXXX" to
> +
> +------------------------------------------
> +(gdb) target remote | perl ./getgtprsp.pl
> +------------------------------------------.
> +
> +After that, set tracepoint and start it as usual:
> +
> +--------------------------------------------------------------------------------
> +(gdb) trace vfs_readdir
> +Tracepoint 1 at 0xffffffff8114f3c0: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +(gdb) actions
> +Enter actions for tracepoint 1, one per line.
> +End with a line saying just "end".
> +#If your GDB support tracepoint "printf" (see "Howto use tracepoint
> printf"), use it to show the value directly is better.
> +>collect $reg
> +>end
> +(gdb) tstart
> +(gdb) stop
> +(gdb) quit
> +--------------------------------------------------------------------------------
> +
> +Then you can find files gtpstart and gtpstop. Copy it to the machine that you
> +want debug.
want to debug.
> +
> +
> +In the debuged machine after insmod the gtp.ko:
debugged
> +Start the tracepoint:
> +
> +------------------------------------
> +cat gtpstart > /sys/kernel/debug/gtp
> +------------------------------------
> +
> +Stop the tracepoint:
> +
> +-----------------------------------
> +cat gtpstop > /sys/kernel/debug/gtp
> +-----------------------------------
> +
> +You can let Linux Kernel show the value directly, please see "Howto let
> +tracepoint output value directly".
> +
> +If you want save the value to the trace frame and parse later, you can use file
want to save
> +"/sys/kernel/debug/gtpframe" that have the trace frame. Copy it to the PC that
that has the
> +has GDB.
> +
> +In the PC that can run the GDB:
> +
> +--------------------------------------------------------------------------------
> +(gdb) target tfile ./gtpframe
> +Tracepoint 1 at 0xffffffff8114f3dc: file
> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
> +Created tracepoint 1 for target's tracepoint 1 at 0xffffffff8114f3c0.
> +(gdb) tfind
> +Found trace frame 0, tracepoint 1
> +#0 vfs_readdir (file=0xffff880036e8f300, filler=0xffffffff8114f240
> <filldir>, buf=0xffff880001e5bf38)
> + at /home/teawater/kernel/linux-2.6/fs/readdir.c:24
> +24 {
> +--------------------------------------------------------------------------------
Hope that helps.
---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
Thanks for your help, Steven and Randy.
I update doc according to your mail in
https://code.google.com/p/kgtp/source/detail?r=306
They will be included in next release.
Best,
Hui
On Mon, Apr 25, 2011 at 22:42, Steven Rostedt <[email protected]> wrote:
> On Sun, 2011-04-24 at 22:28 +0800, Hui Zhu wrote:
>
>
> There is several grammar mistakes, I'll correct those here that caused
> me to have trouble understanding what you were saying. There's more
> mistakes that I'm not correcting because I still understand what you
> meant. I'll let Randy correct those, as he can come up with better
> sentences than I can.
>
> Do not take this as an insult, I have an utmost respect for those that
> communicate on LKML in a language that is not their own mother tongue.
> And I also understand that the Asian languages are even more different
> than English that it makes it 10 times more difficult to get it right
> (as suppose to those that speak German).
>> --- /dev/null
>> +++ b/Documentation/trace/gtp.txt
>> @@ -0,0 +1,873 @@
>> + ? ? ? ? ? ? Linux Kernel GDB tracepoint module (KGTP)
>> + ? ? ? ? ? ? =========================================
>> + ? ? ? ? ? ? By Hui Zhu <[email protected]>
>> + ? ? ? ? ? ? https://code.google.com/p/kgtp/wiki/HOWTO
>> + ? ? ? ? ? ? 2011-04-24
>> +
>> +Table of contents
>> +-----------------
>> +
>> +What is KGTP
>> +Report issue about KGTP
>> +Get info about GDB tracepoint
>> +Get KGTP through http
>> +Get KGTP through svn
>> +Config KGTP
>> +Compile KGTP
>> +Install KGTP
>> +Uninstall KGTP
>> +Howto use
>> + ? ? Exec it
>> + ? ? Make GDB connect to gtp
>> + ? ? Add module symbols to GDB
>> + ? ? Get GDB tracepoint commands
>> + ? ? Get registers info from Kernel
>> + ? ? Get the value of variable from Kernel
>> + ? ? How to use use tracepoint condition
>> + ? ? How to use trace state variables
>> + ? ? ? ? ? ? Simple trace state variables
>> + ? ? ? ? ? ? Special trace state variables $current_task,
>> + ? ? ? ? ? ? ? ? $current_thread_info, $cpu_id, $dump_stack, $printk_level,
>> + ? ? ? ? ? ? ? ? $printk_format, $printk_tmp and $clock
>> + ? ? Show all the traced data of current frame
>> + ? ? Get backtrace info from Kernel
>> + ? ? Howto let tracepoint output value directly
>> + ? ? ? ? ? ? Output stack dump directly
>> + ? ? ? ? ? ? Switch collect to output the value directly
>> + ? ? ? ? ? ? Use printf command in actions
>> + ? ? Get status of KGTP from Kernel
>> + ? ? Set the trace buffer into a circular buffer
>> + ? ? Do not stop tracepoint when the GDB disconnect
>> + ? ? Howto show the variable that value of it is optimized
>> + ? ? ? ? ? ? Linux kernel "Compile with almost no optimization" patch
>> + ? ? ? ? ? ? Update your GCC
>> + ? ? Offline debug
>> +
>> +
>> +
>> +
>> +What is KGTP
>> +------------
>> +
>> +KGTP is a realtime and lightweight Linux Kernel GDB debugger and tracer that
>> +use Kprobe.
>
> "uses Kprobes."
>
>> +
>> +It make Linux Kernel supply a GDB remote debug interface. Then GDB in current
>
> It supplies the Linux Kernel with a GDB remote debug interface. ...
>
>> +machine or remote machine(see "Make GDB connect to gtp") can debug Linux
>> +through GDB tracepoint without stop the Linux Kernel.
>
> without stopping the Linux Kernel.
>
>> +And even if the board doesn't have GDB on it and doesn't have interface for
>> +remote debug. It can debug the Linux Kernel use offline debug (See "Offline
>
> using offline debug.
>
>> +debug").
>> +It support X86-32, X86-64, MIPS and ARM.
>> +http://www.tudou.com/programs/view/_p6VTgxmCRA/ This is a video(in Chinese)
>> +to show how to use it.
>> +
>> +
>> +
>> +
>> +Report issue about KGTP
>
> Report an issues about KGTP
>
>> +-----------------------
>> +You can post it in https://code.google.com/p/kgtp/issues/list or write Email
>
> or write an email to ...
>
>> +to [email protected].
>> +
>> +
>> +
>> +
>> +Get info about GDB tracepoint
>> +-----------------------------
>> +Please goto http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
>> +
>> +
>> +
>> +
>> +Get KGTP through http
>> +---------------------
>> +Please goto http://code.google.com/p/kgtp/downloads/list OR UPDATE to down
>
> to download the package (?)
>
>> +the package.
>> +
>> +
>> +
>> +
>> +Get KGTP through svn
>> +--------------------
>> +Some people have trouble with access to KGTP website. You can access kgtp
>> +through svn:
>> +
>> +------------------------------------------------------------
>> +svn checkout http://kgtp.googlecode.com/svn/ kgtp-read-only
>> +------------------------------------------------------------
>> +
>> +kgtp-read-only/tags/ There is the each release of KGTP.
>
> This has each release of KGTP (?)
>
>> +kgtp-read-only/trunk/ There is the main trunk of KGTP.
>
> This is the main code repository of KGTP (?)
>
>> +
>> +
>> +
>> +
>> +Config KGTP
>> +-----------
>> +
>> +Before compile KGTP, you can choice which Kernel you want build with and
>
> Before compiling KGTP, you can choose which kernel you want to build
> with and
>
>> +which compiler you want through change the Makefile. For example:
>
> which compiler you want by changing the Makefile in your KGTP
> repository. (?)
>
>
>> +
>> +-------------------------------------------
>> +KERNELDIR := /lib/modules/`uname -r`/build
>> +CROSS_COMPILE :=
>> +-------------------------------------------
>> +
>> +KERNELDIR is set the directory which Kernel you want build for. Now it set to
>
> KERELDIR is set to the directory which holds the kernel you want to
> build for. By default, it is set to the kernel that you are running.
>
>> +the current kernel that you use.
>
>> +CROSS_COMPILE is set the compiler that you want to build the KGTP. Empty mean
>> +use current compiler.
>
> CROSS_COMPILE is set to the compiler you want to build KGTP. Leave empty
> to compile with your default compiler.
>
>> +ARCH is the architecture.
>> +
>> +------------------------------------------
>> +KERNELDIR := /home/teawater/kernel/bamd64
>> +CROSS_COMPILE :=x86_64-glibc_std-
>> +ARCH := x86_64
>> +------------------------------------------
>> +
>> +KERNELDIR is set to /home/teawater/kernel/bamd64. Compiler will
>> +use x86_64-glibc_std-gcc.
>> +
>> +
>> +
>> +
>> +Compile KGTP
>> +------------
>> +
>> +For normal use:
>> +
>> +---------
>> +cd kgtp/
>> +make
>> +---------
>> +
>> +If you want KGTP out the debug message,please use following (It is available
>> +after 20100825):
>
>
> I'm not sure what you mean by the above. Do you mean:
>
> If you want KGTP to output debug messages, then us the following (....)
>
>> +
>> +---------
>> +cd kgtp/
>> +make D=1
>> +---------
>> +
>> +
>> +
>> +
>> +Install KGTP
>> +------------
>> +
>> +------------------
>> +cd kgtp/
>> +sudo make install
>> +------------------
>> +
>> +
>> +
>> +
>> +Uninstall KGTP
>> +--------------
>> +
>> +--------------------
>> +cd kgtp/
>> +sudo make uninstall
>> +--------------------
>> +
>> +
>> +
>> +
>> +Howto use
>> +---------
>> +
>> +Exec it
>> +-------
>> +
>> +If you had installed the KGTP in your system, you can:
>> +
>> +------------------
>> +sudo modprobe gtp
>> +------------------
>> +
>> +Or you can use the kgtp module in the directory.
>> +
>> +-------------------
>> +cd kgtp/
>> +sudo insmod gtp.ko
>> +-------------------
>> +
>> +
>> +
>> +Make GDB connect to gtp
>> +-----------------------
>> +
>> +In current machine:
>
> On current machine.
>
> Now it may be better to use "server" instead of current machine. I guess
> you mean the man box the user is using.
>
>> +
>> +---------------------------------
>> +sudo gdb ./vmlinux
>> +(gdb) target remote /sys/kernel/debug/gtp
>> +Remote debugging using /sys/kernel/debug/gtp
>> +0x0000000000000000 in ?? ()
>> +---------------------------------
>> +
>> +In remote machine:
>
> On remote machine:
>
> "target" may also be better, but I'm fine with "remote".
>
>> +
>> +---------------------------------------------
>> +#Open the KGTP interface in current machine.
>
> Now do you mean current == remote? I'm confused here. It is best to stay
> consistent. Always use "remote" and always use "server".
>
>> +sudo su
>> +nc -l 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp
>> +(nc -l -p 1234 </sys/kernel/debug/gtp >/sys/kernel/debug/gtp for old version
>> +netcat.)
>> +#Let gdb connect to the port 1234
>> +gdb ./vmlinux
>> +(gdb) target remote xxx.xxx.xxx.xxx:1234
>
> You run gdb on the remote machine too?
>
>> +---------------------------------------------
>> +
>> +
>> +
>> +Add module symbols to GDB
>> +-------------------------
>> +
>> +Sometime, you need add the Linux Kernel module(lkm) symbols to GDB to debug it.
>> +Following a example howto add ext3.ko's symbols to GDB:
>
> The following example howto adds ext3.ko symbols to GDB:
>
>> +
>> +--------------------------------------------------------------------------------
>> +cat /proc/modules ?| grep ext
>> +ext3 116512 3 - Live 0xf9083000
>> +#Get the address 0xf9083000.
>> +modinfo ext3
>> +filename: ? ? ? /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
>> +#Get the directory name of ext3.
>> +(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
>> 0xf9083000
>> +#Then, GDB get the symbols of ext3.
>
> Now GDB has the symbols for ext3 (?)
>
>> +--------------------------------------------------------------------------------
>> +
>> +You will see that it just add the text section info to GDB, sometime you need
> just adds the ..., sometimes you need to add the info section of another
> section. For example:
>
>> +add another section info of other section, for example:
>> +
>> +--------------------------------------------------------------------------------
>> +cat /sys/module/ext3/sections/.bss
>> +0xf908170c
>> +#Get the bss address 0xf908170c.
>> +(gdb) add-symbol-file /lib/modules/2.6.36-rc2+/kernel/fs/ext3/ext3.ko
>> 0xf9083000 -s .bss 0xf908170c
>> +#Then, GDB get the symbols of ext3.
>
> Now GDB has the .bss symbols for ext3 (?)
>
>> +--------------------------------------------------------------------------------
>> +
>> +
>> +
>> +Get GDB tracepoint commands
>> +---------------------------
>> +
>> +Please goto http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoints.html
>> +
>> +
>> +Get registers info from Kernel
>> +------------------------------
>> +
>> +Following part is an example that record the value of all registers when Linux
>> +Kernel call function "vfs_readdir".
>
> The following is an example that records the value of all registers when
> "vfs_readdir" is called.
>
>> +
>> +--------------------------------------------------------------------------------
>> +(gdb) trace vfs_readdir
>
> Is this on the server or remote? Or do you mean that you can do this
> from either one or the other.
>
> Again, I'm a bit confused ;)
>
>
>> +Tracepoint 1 at 0xc01a1ac0: file
>> +/home/teawater/kernel/linux-2.6/fs/readdir.c, line 23.
>> +(gdb) actions
>> +Enter actions for tracepoint 1, one per line.
>> +End with a line saying just "end".
>> +>collect $reg
>> +>end
>> +(gdb) tstart
>> +(gdb) shell ls
>
> I take it that this is run on the remote (target) box. I don't think
> this would work on the server, would it?
>
>> +(gdb) tstop
>> +(gdb) tfind
>> +Found trace frame 0, tracepoint 1
>> +#0 ?0xc01a1ac1 in vfs_readdir (file=0xc5528d00, filler=0xc01a1900 <filldir64>,
>> + ? buf=0xc0d09f90) at /home/teawater/kernel/linux-2.6/fs/readdir.c:23
>> +23 ? ? ?/home/teawater/kernel/linux-2.6/fs/readdir.c: No such file or
>> directory.
>> + ? ? ? in /home/teawater/kernel/linux-2.6/fs/readdir.c
>> +(gdb) info reg
>> +eax ? ? ? ? ? ?0xc5528d00 ? ? ? -984445696
>> +ecx ? ? ? ? ? ?0xc0d09f90 ? ? ? -1060069488
>> +edx ? ? ? ? ? ?0xc01a1900 ? ? ? -1072031488
>> +ebx ? ? ? ? ? ?0xfffffff7 ? ? ? -9
>> +esp ? ? ? ? ? ?0xc0d09f8c ? ? ? 0xc0d09f8c
>> +ebp ? ? ? ? ? ?0x0 ? ? ?0x0
>> +esi ? ? ? ? ? ?0x8061480 ? ? ? ?134616192
>> +edi ? ? ? ? ? ?0xc5528d00 ? ? ? -984445696
>> +eip ? ? ? ? ? ?0xc01a1ac1 ? ? ? 0xc01a1ac1 <vfs_readdir+1>
>> +eflags ? ? ? ? 0x286 ? ?[ PF SF IF ]
>> +cs ? ? ? ? ? ? 0x60 ? ? 96
>> +ss ? ? ? ? ? ? 0x8061480 ? ? ? ?134616192
>> +ds ? ? ? ? ? ? 0x7b ? ? 123
>> +es ? ? ? ? ? ? 0x7b ? ? 123
>> +fs ? ? ? ? ? ? 0x0 ? ? ?0
>> +gs ? ? ? ? ? ? 0x0 ? ? ?0
>> +(gdb) tfind
>> +Found trace frame 1, tracepoint 1
>> +0xc01a1ac1 ? ? ?23 ? ? ?in /home/teawater/kernel/linux-2.6/fs/readdir.c
>> +(gdb) info reg
>> +eax ? ? ? ? ? ?0xc5528d00 ? ? ? -984445696
>> +ecx ? ? ? ? ? ?0xc0d09f90 ? ? ? -1060069488
>> +edx ? ? ? ? ? ?0xc01a1900 ? ? ? -1072031488
>> +ebx ? ? ? ? ? ?0xfffffff7 ? ? ? -9
>> +esp ? ? ? ? ? ?0xc0d09f8c ? ? ? 0xc0d09f8c
>> +ebp ? ? ? ? ? ?0x0 ? ? ?0x0
>> +esi ? ? ? ? ? ?0x8061480 ? ? ? ?134616192
>> +edi ? ? ? ? ? ?0xc5528d00 ? ? ? -984445696
>> +eip ? ? ? ? ? ?0xc01a1ac1 ? ? ? 0xc01a1ac1 <vfs_readdir+1>
>> +eflags ? ? ? ? 0x286 ? ?[ PF SF IF ]
>> +cs ? ? ? ? ? ? 0x60 ? ? 96
>> +ss ? ? ? ? ? ? 0x8061480 ? ? ? ?134616192
>> +ds ? ? ? ? ? ? 0x7b ? ? 123
>> +es ? ? ? ? ? ? 0x7b ? ? 123
>> +fs ? ? ? ? ? ? 0x0 ? ? ?0
>> +gs ? ? ? ? ? ? 0x0 ? ? ?0
>> +--------------------------------------------------------------------------------
>> +
>> +
>> +
>> +Get the value of variable from Kernel
>> +-------------------------------------
>> +
>> +Following part is an example that record the value of "jiffies_64" when Linux
>> +Kernel call function "vfs_readdir".
>
> The following is an example that records the value of "jiffies_64" when
> the function "vfs_readdir" is called:
>
>> +
>> +--------------------------------------------------------------------------------
>> +(gdb) trace vfs_readdir
>> +Tracepoint 1 at 0xc01ed740: file
>> /home/teawater/kernel/linux-2.6/fs/readdir.c, line 24.
>> +(gdb) actions
>> +Enter actions for tracepoint 1, one per line.
>> +End with a line saying just "end".
>> +>collect jiffies_64
>> +>collect file->f_path.dentry->d_iname
>> +>end
>> +(gdb) tstart
>> +(gdb) shell ls
>> +arch ? ?drivers ? include ?kernel ? ?mm ? ? ? ? ? ? ? Module.symvers
>> security ?System.map ?virt
>> +block ? firmware ?init ? ? lib ? ? ? modules.builtin ?net
>> sound ? ? t ? ? ? ? ? vmlinux
>> +crypto ?fs ? ? ? ?ipc ? ? ?Makefile ?modules.order ? ?scripts
>> source ? ?usr ? ? ? ? vmlinux.o
>> +(gdb) tstop
>> +(gdb) tfind
>> +Found trace frame 0, tracepoint 1
>> +#0 ?0xc01ed741 in vfs_readdir (file=0xf4063000, filler=0xc01ed580
>> <filldir64>, buf=0xd6dfdf90)
>> + ? ?at /home/teawater/kernel/linux-2.6/fs/readdir.c:24
>> +24 ? ? ?{
>> +(gdb) p jiffies_64
>> +$1 = 4297248706
>> +(gdb) p file->f_path.dentry->d_iname
>> +$1 = "b26", '\000' <repeats 28 times>
>> +--------------------------------------------------------------------------------
>> +
>> +
>> +
>> +How to use use tracepoint condition
>> +-----------------------------------
>> +
>> +http://sourceware.org/gdb/current/onlinedocs/gdb/Tracepoint-Conditions.html
>> +Like the breakpoint, we can set condition to tracepoint. But it speed is more
>> +fast than breakpoint's condition because KGTP do all the condition check.
>
> Like breakpoints, conditions can be set to tracepoints. The speed of
> tracepoints is faster than breakpoints because KGTP can do all the
> condition checks.
>
>> +For example:
>> +
>> +------------------------------
>> +(gdb) trace handle_irq
>> +(gdb) condition 1 (irq == 47)
>> +------------------------------
>> +
>> +This action of tracepoint 1 will work only when irq number is 47.
>> +
>> +
>> +
>> +How to use trace state variables
>> +--------------------------------
>> +
>> +http://sourceware.org/gdb/current/onlinedocs/gdb/Trace-State-Variables.html
>> +Tracepoint have special variables. You can trace it or use it in tracepoint
>> +condition.
>
> Tracepoints have special variables. The variables can be traced
> directly, or used in tracepoint conditions.
>
>> +Note that only GDB 7.2.1 and later version support use trace state variables
>
> Note that only GDB versions 7.2.1 and later support the sue of trace
> state variables directly,..
>
>> +directly, the old version GDB just can show the value of trace state variables
>
> , the old version of GDB can show the value of trace ...
>
>> +through command "info tvariables".
>> +
>> +
>> +Simple trace state variables
>> +----------------------------
>> +
>> +Define a trace state variable $c.
>> +
>> +-------------------
>> +(gdb) tvariable $c
>> +-------------------
>> +
>> +Trace state variable $c created, with initial value 0.
>
> ... variable $c is created with initial value 0.
>
>> +Use it in the action. Follow action will use $c to count how much irq happen
>> +in Kernel.
>
> The following action uses $c to count how many irqs happened in the
> Kernel.
>
>> +
>> +-----------------------------------------------------------------------
>> +(gdb) trace handle_irq
>> +(gdb) actions
>> +Enter actions for tracepoint 3, one per line.
>> +End with a line saying just "end".
>> +>collect $c ? ? #Save current value of $c to the trace frame buffer.
>> +>teval $c=$c+1 ?#Increase the $c.
>> +>end
>> +-----------------------------------------------------------------------
>> +
>> +You can get the current value of $c when the trace is running or stop.
>
> ... of $c while the trace is running or stopped.
>
>> +
>> +----------------------------------
>> +(gdb) tstart
>> +(gdb) info tvariables
>> +$c ? ? ? ? ? ? ?0 ? ? ? ? ? 31554
>> +(gdb) p $c
>> +$5 = 33652
>> +(gdb) tstop
>> +(gdb) p $c
>> +$9 = 105559
>> +----------------------------------
>> +
>> +When use the tfind parse the trace frame buffer, if the value of trace state
>> +variable is collect. You can use it.
>
> I do not understand the above at all.
>
>> +
>> +------------------------------
>> +(gdb) tstop
>> +(gdb) tfind
>> +(gdb) info tvariables
>> +$c ? ? ? ? ? ? ?0 ? ? ? ? ? 0
>> +(gdb) p $c
>> +$6 = 0
>> +(gdb) tfind 100
>> +(gdb) p $c
>> +$7 = 100
>> +------------------------------
>
> Nor do I understand the above example.
>
>
>> +
>> +
>> +Special trace state variables $current_task, $current_thread_info, $cpu_id,
>> +$dump_stack, $printk_level, $printk_format, $printk_tmp and $clock
>> +--------------------------------------------------------------------------
>> +
>> +KGTP have special trace state variables $current_task, $current_thread_info,
>
> KGTP has special ...
>
>> +$cpu_id and $clock can very easy to access to some special value. You can see
>
> ... $clock that can be used to access their special values. (?)
>
>> +them when GDB connect to the KGTP. You can use them in tracepoint condition
>
> ? ? ? ? ? ? ? ? connects ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? conditions
>
>> +or actions.
>> +Access $current_task in tracepoint condition and action will get the return
>> +of get_current().
>
> The use of $current_task in tracepoint conditions will return the action
> of get_current().
>
>> +Access $current_thread_info in tracepoint condition and action will get the
>> +return of current_thread_info().
>
> Same
>
>> +Access $cpu_id in tracepoint condition and action will get the return of
>> +smp_processor_id().
>
> Same
>
>> +Access $clock in tracepoint condition and action will get the return of
>> +local_clock() that return the timestamp in nanoseconds.
>
> Same
>
>> +
>> +And KGTP have other special trace state variables $dump_stack, $printk_level,
>
> KGTP has other special trace state variables ...
>
>> +$printk_format and $printk_tmp, all of them are for output value directly that
>
> ? ? ? ? ? ? ? ? ? ? ?$print_tmp. Their output is explained in
> "Howto ..."
>
>> +will introduce in "Howto let tracepoint output value directly".
>> +
>> +Following example will count process 16663 call how many sys_read in $c
>> +and collect the struct thread_info of current task:
>
> I'm confused by what $c is to give it a proper translation.
>
>> +
>> +--------------------------------------------------------------------------------
>> +(gdb) trace vfs_read if ((*(struct task_struct *)$current_task)->pid == 16663)
>> +(gdb) tvariable $c
>> +(gdb) actions
>> +Enter actions for tracepoint 4, one per line.
>> +End with a line saying just "end".
>> +>teval $c=$c+1
>> +>collect (*(struct thread_info *)$current_thread_info)
>> +>end
>> +(gdb) tstart
>> +(gdb) info tvariables
>> +Name ? ? ? ? ? ?Initial ? ? Current
>> +$c ? ? ? ? ? ? ?0 ? ? ? ? ? 184
>> +$current_task ? 0 ? ? ? ? ? <unknown>
>> +$current_thread_info 0 ? ? ? ? ? <unknown>
>> +$cpu_id ? ? ? ? 0 ? ? ? ? ? <unknown>
>> +(gdb) tstop
>> +(gdb) tfind
>> +(gdb) p *(struct thread_info *)$current_thread_info
>> +$10 = {task = 0xf0ac6580, exec_domain = 0xc07b1400, flags = 0, status
>> = 0, cpu = 1, preempt_count = 2, addr_limit = {
>> + ? ?seg = 4294967295}, restart_block = {fn = 0xc0159fb0
>> <do_no_restart_syscall>, {{arg0 = 138300720, arg1 = 11,
>> + ? ? ? ?arg2 = 1, arg3 = 78}, futex = {uaddr = 0x83e4d30, val = 11,
>> flags = 1, bitset = 78, time = 977063750,
>> + ? ? ? ?uaddr2 = 0x0}, nanosleep = {index = 138300720, rmtp = 0xb,
>> expires = 335007449089}, poll = {
>> + ? ? ? ?ufds = 0x83e4d30, nfds = 11, has_timeout = 1, tv_sec = 78,
>> tv_nsec = 977063750}}},
>> + ?sysenter_return = 0xb77ce424, previous_esp = 0, supervisor_stack =
>> 0xef340044 "", uaccess_err = 0}
>> +--------------------------------------------------------------------------------
>
>
> This is all I have time for this now, but this work looks very
> promising. When I get some more time, I will have to start playing with
> it.
>
> Thanks!
>
> -- Steve
>
>
>