Hello everyone,
I am trying to port kernel 2.6.19 onto my system.so I need the c code
, which can show me where the program is running. I add -g when I
compile it.
after I got the vmlinux( uncompressed) I used arm-none-eabi-objcopy
--change-addresses 0x40000000 to change the start address.
it seems that the debug information is strange. expecially after the
mmu is turned on , it totally disappreared.
anyone knows how to handle this?
thanks in advance.
regards,
yang
On 17/08/07, Xu Yang <[email protected]> wrote:
> Hello everyone,
>
> I am trying to port kernel 2.6.19 onto my system.so I need the c code
> , which can show me where the program is running. I add -g when I
> compile it.
>
You shouldn't need to do that manually, simply go into "make
menuconfig", enter the "Kernel hacking" menu and select the "Kernel
debugging" and "Compile the kernel with debug info" options.
You may also want to enable "Compile the kernel with frame pointers"
and various other options in that menu to get more debug info.
--
Jesper Juhl <[email protected]>
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please http://www.expita.com/nomime.html
Hi Jesper,
I tried as what you told me. and the vmlinux does contain debug
information. but the start address of this vmlinux is 0xc0008000. when
I tried to run this vmlinux, the program always exit at 0x80a0. I
checked out that here is the place mmu is turned on.
so I used objcopy --change-addresses 0x40000000 to change the start
address of the vmlinux, and the program goes further.but the debug
information disappeared.
how to handle this? (making the program running and debug information available)
thanks,
regards,
yang
2007/8/17, Jesper Juhl <[email protected]>:
> On 17/08/07, Xu Yang <[email protected]> wrote:
> > Hello everyone,
> >
> > I am trying to port kernel 2.6.19 onto my system.so I need the c code
> > , which can show me where the program is running. I add -g when I
> > compile it.
> >
> You shouldn't need to do that manually, simply go into "make
> menuconfig", enter the "Kernel hacking" menu and select the "Kernel
> debugging" and "Compile the kernel with debug info" options.
> You may also want to enable "Compile the kernel with frame pointers"
> and various other options in that menu to get more debug info.
>
>
> --
> Jesper Juhl <[email protected]>
> Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
> Plain text mails only, please http://www.expita.com/nomime.html
>
On Aug 18 2007 21:49, Xu Yang wrote:
>
>I tried as what you told me. and the vmlinux does contain debug
>information. but the start address of this vmlinux is 0xc0008000. when
>I tried to run this vmlinux, the program always exit at 0x80a0. I
>checked out that here is the place mmu is turned on.
>so I used objcopy --change-addresses 0x40000000 to change the start
>address of the vmlinux, and the program goes further.but the debug
>information disappeared.
Are you using an UML image... or were you really trying to gdb a real vmlinux?
Jan
--
this vmlinux file is running on my software virtual prototype system.
and my software enviorment can only load elf file, so I am using this
real vmlinux file.
regards,
Yang
2007/8/18, Jan Engelhardt <[email protected]>:
>
> On Aug 18 2007 21:49, Xu Yang wrote:
> >
> >I tried as what you told me. and the vmlinux does contain debug
> >information. but the start address of this vmlinux is 0xc0008000. when
> >I tried to run this vmlinux, the program always exit at 0x80a0. I
> >checked out that here is the place mmu is turned on.
> >so I used objcopy --change-addresses 0x40000000 to change the start
> >address of the vmlinux, and the program goes further.but the debug
> >information disappeared.
>
> Are you using an UML image... or were you really trying to gdb a real vmlinux?
>
>
>
> Jan
> --
>
On Aug 18 2007 22:01, Xu Yang wrote:
>
>this vmlinux file is running on my software virtual prototype system.
>and my software enviorment can only load elf file, so I am using this
>real vmlinux file.
Maybe there is a problem in your virtual prototype system (VM?).
Jan
--