Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761502AbZC3Vzp (ORCPT ); Mon, 30 Mar 2009 17:55:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754028AbZC3Vzf (ORCPT ); Mon, 30 Mar 2009 17:55:35 -0400 Received: from e33.co.us.ibm.com ([32.97.110.151]:38222 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753941AbZC3Vzc (ORCPT ); Mon, 30 Mar 2009 17:55:32 -0400 Message-ID: <49D13FCE.3020106@us.ibm.com> Date: Mon, 30 Mar 2009 14:55:26 -0700 From: Darren Hart User-Agent: Thunderbird 2.0.0.21 (X11/20090318) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: Thomas Gleixner , Sripathi Kodi , Peter Zijlstra , John Stultz , Steven Rostedt , Dinakar Guniguntala , Ulrich Drepper , Eric Dumazet , Ingo Molnar , Jakub Jelinek Subject: Re: glibc hacks for requeue_pi References: <20090330213306.606.9540.stgit@Aeon> In-Reply-To: <20090330213306.606.9540.stgit@Aeon> Content-Type: multipart/mixed; boundary="------------060306000605070902060600" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 41316 Lines: 1499 This is a multi-part message in MIME format. --------------060306000605070902060600 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit The attached patch is what we used to test glibc with requeue_pi. As a prototype we deleted the assembly optimizations and just updated the .c implementation. Credit for the prototype goes to Sripathi Kodi. Thanks, -- Darren Hart --------------060306000605070902060600 Content-Type: text/x-diff; name="glibc_requeue_pi_prototype_v3.patch" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="glibc_requeue_pi_prototype_v3.patch" diff -uprN glibc-2.5-20061008T1257_org/nptl/sysdeps/pthread/pthread_cond_broadcast.c glibc-2.5-20061008T1257/nptl/sysdeps/pthread/pthread_cond_broadcast.c --- glibc-2.5-20061008T1257_org/nptl/sysdeps/pthread/pthread_cond_broadcast.c 2009-01-19 13:52:14.000000000 +0530 +++ glibc-2.5-20061008T1257/nptl/sysdeps/pthread/pthread_cond_broadcast.c 2009-03-26 14:38:53.000000000 +0530 @@ -27,11 +27,39 @@ #include #include +#define FUTEX_CMP_REQUEUE 4 +#define FUTEX_REQUEUE_PI 12 +#define FUTEX_CMP_REQUEUE_PI 13 + +/* Returns non-zero if error happened, zero if success. */ +#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __ret; \ + __ret = INTERNAL_SYSCALL (futex, __err, 6, \ + (futexp), FUTEX_CMP_REQUEUE, (nr_wake), \ + (nr_move), (mutex), (val)); \ + INTERNAL_SYSCALL_ERROR_P (__ret, __err); \ + }) + + +/* Returns non-zero if error happened, zero if success. */ +#define lll_futex_requeue_pi(futexp, nr_wake, nr_move, mutex, val) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __ret; \ + __ret = INTERNAL_SYSCALL (futex, __err, 6, \ + (futexp), FUTEX_CMP_REQUEUE_PI, (nr_wake), \ + (nr_move), (mutex), (val)); \ + INTERNAL_SYSCALL_ERROR_P (__ret, __err); \ + }) int __pthread_cond_broadcast (cond) pthread_cond_t *cond; { + int err; + /* Make sure we are alone. */ lll_mutex_lock (cond->__data.__lock); @@ -57,9 +85,25 @@ __pthread_cond_broadcast (cond) pthread_mutex_t *mut = (pthread_mutex_t *) cond->__data.__mutex; /* XXX: Kernel so far doesn't support requeue to PI futex. */ - if (__builtin_expect (mut->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP, +/* if (__builtin_expect (mut->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP, 0)) goto wake_all; +*/ + /* requeue_pi */ + /* This code assumes that lll_futex_requeue_pi returns 0 on success */ + if (mut->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP) + { + err = lll_futex_requeue_pi (&cond->__data.__futex, 1, INT_MAX, + &mut->__data.__lock, futex_val); + /* FIXME: We now return any error other than ENOSYS to application */ + if (!err) + return 0; + else if (err != ENOSYS) + return err; + else /* It is ENOSYS */ + goto wake_all; + } + /* lll_futex_requeue returns 0 for success and non-zero for errors. */ diff -uprN glibc-2.5-20061008T1257_org/nptl/sysdeps/pthread/pthread_cond_signal.c glibc-2.5-20061008T1257/nptl/sysdeps/pthread/pthread_cond_signal.c --- glibc-2.5-20061008T1257_org/nptl/sysdeps/pthread/pthread_cond_signal.c 2009-01-19 13:52:14.000000000 +0530 +++ glibc-2.5-20061008T1257/nptl/sysdeps/pthread/pthread_cond_signal.c 2009-03-26 14:43:08.000000000 +0530 @@ -27,11 +27,48 @@ #include #include +#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1) +#define FUTEX_WAKE_OP 5 + +#define FUTEX_REQUEUE_PI 12 +#define FUTEX_CMP_REQUEUE_PI 13 + +/* Returns non-zero if error happened, zero if success. */ +#define lll_futex_requeue_pi(futexp, nr_wake, nr_move, mutex, val) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __ret; \ + __ret = INTERNAL_SYSCALL (futex, __err, 6, \ + (futexp), FUTEX_REQUEUE_PI, (nr_wake), \ + (nr_move), (mutex), (val)); \ + INTERNAL_SYSCALL_ERROR_P (__ret, __err); \ + }) + + +/* Returns non-zero if error happened, zero if success. */ +#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __ret; \ + \ + __ret = INTERNAL_SYSCALL (futex, __err, 6, \ + (futexp), FUTEX_WAKE_OP, (nr_wake), \ + (nr_wake2), (futexp2), \ + FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \ + INTERNAL_SYSCALL_ERROR_P (__ret, __err); \ + }) + int __pthread_cond_signal (cond) pthread_cond_t *cond; { + int err; + + /* Needed for requeue_pi. */ + pthread_mutex_t *mut = (pthread_mutex_t *) cond->__data.__mutex; + int futex_val = cond->__data.__futex; + /* Make sure we are alone. */ lll_mutex_lock (cond->__data.__lock); @@ -42,6 +79,21 @@ __pthread_cond_signal (cond) ++cond->__data.__wakeup_seq; ++cond->__data.__futex; + /* requeue_pi: requeue 1 waiter */ + /* This code assumes that lll_futex_requeue_pi returns 0 on success */ + if (mut->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP) + { + err = lll_futex_requeue_pi (&cond->__data.__futex, 1, 0, &mut->__data.__lock, + futex_val); + /* FIXME: We now return any error other than ENOSYS to application + * In case of ENOSYS we fall through this code to call lll_futex_wake_unlock*/ + if (!err) + goto requeued; + else if (err != ENOSYS) + return err; + } + + /* Wake one. */ if (! __builtin_expect (lll_futex_wake_unlock (&cond->__data.__futex, 1, 1, &cond->__data.__lock), @@ -51,6 +103,8 @@ __pthread_cond_signal (cond) lll_futex_wake (&cond->__data.__futex, 1); } +requeued: + /* We are done. */ lll_mutex_unlock (cond->__data.__lock); diff -uprN glibc-2.5-20061008T1257_org/nptl/sysdeps/pthread/pthread_cond_timedwait.c glibc-2.5-20061008T1257/nptl/sysdeps/pthread/pthread_cond_timedwait.c --- glibc-2.5-20061008T1257_org/nptl/sysdeps/pthread/pthread_cond_timedwait.c 2009-01-19 13:52:14.000000000 +0530 +++ glibc-2.5-20061008T1257/nptl/sysdeps/pthread/pthread_cond_timedwait.c 2009-03-26 14:43:08.000000000 +0530 @@ -39,6 +39,18 @@ struct _condvar_cleanup_buffer unsigned int bc_seq; }; +#define FUTEX_WAIT_REQUEUE_PI 11 + +#define lll_futex_timed_wait_requeue_pi(futexp, val, time, mutex) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __ret; \ + __ret = INTERNAL_SYSCALL (futex, __err, 5, \ + (futexp), FUTEX_WAIT_REQUEUE_PI, (val), time, (mutex)); \ + INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret : __ret; \ + }) + + int __pthread_cond_timedwait (cond, mutex, abstime) pthread_cond_t *cond; @@ -151,9 +163,18 @@ __pthread_cond_timedwait (cond, mutex, a /* Enable asynchronous cancellation. Required by the standard. */ cbuffer.oldtype = __pthread_enable_asynccancel (); - /* Wait until woken by signal or broadcast. */ - err = lll_futex_timed_wait (&cond->__data.__futex, + /* requeue_pi */ + if (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP) + { + err = lll_futex_timed_wait_requeue_pi (&cond->__data.__futex, + futex_val, &rt, &mutex->__data.__lock); + } else + { + + /* Wait until woken by signal or broadcast. */ + err = lll_futex_timed_wait (&cond->__data.__futex, futex_val, &rt); + } /* Disable asynchronous cancellation. */ __pthread_disable_asynccancel (cbuffer.oldtype); @@ -205,7 +226,11 @@ __pthread_cond_timedwait (cond, mutex, a __pthread_cleanup_pop (&buffer, 0); /* Get the mutex before returning. */ - err = __pthread_mutex_cond_lock (mutex); + /* With requeue_pi, the lock is held in the kernel, so just return 0 to application */ + if (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP) + return 0; + else + err = __pthread_mutex_cond_lock (mutex); return err ?: result; } diff -uprN glibc-2.5-20061008T1257_org/nptl/sysdeps/pthread/pthread_cond_wait.c glibc-2.5-20061008T1257/nptl/sysdeps/pthread/pthread_cond_wait.c --- glibc-2.5-20061008T1257_org/nptl/sysdeps/pthread/pthread_cond_wait.c 2009-01-19 13:52:14.000000000 +0530 +++ glibc-2.5-20061008T1257/nptl/sysdeps/pthread/pthread_cond_wait.c 2009-03-26 14:43:09.000000000 +0530 @@ -87,6 +87,17 @@ __condvar_cleanup (void *arg) __pthread_mutex_cond_lock (cbuffer->mutex); } +#define FUTEX_WAIT_REQUEUE_PI 11 + +#define lll_futex_wait_requeue_pi(futexp, val, mutex) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __ret; \ + __ret = INTERNAL_SYSCALL (futex, __err, 5, \ + (futexp), FUTEX_WAIT_REQUEUE_PI, (val), 0, (mutex)); \ + INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret : __ret; \ + }) + int __pthread_cond_wait (cond, mutex) @@ -145,9 +156,25 @@ __pthread_cond_wait (cond, mutex) /* Enable asynchronous cancellation. Required by the standard. */ cbuffer.oldtype = __pthread_enable_asynccancel (); + /* requeue_pi */ + if (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP) + { + err = lll_futex_wait_requeue_pi (&cond->__data.__futex, + futex_val, &mutex->__data.__lock); + /* If error is ENOSYS, we fall through this code to call lll_futex_wait. + * Return any other error to application, for now + * FIXME: Find out what other errors can come from the kernel */ + if (!err) + goto requeued; + else if (err != ENOSYS) + return err; + } + /* Wait until woken by signal or broadcast. */ lll_futex_wait (&cond->__data.__futex, futex_val); +requeued: + /* Disable asynchronous cancellation. */ __pthread_disable_asynccancel (cbuffer.oldtype); @@ -173,6 +200,10 @@ __pthread_cond_wait (cond, mutex) /* If pthread_cond_destroy was called on this varaible already, notify the pthread_cond_destroy caller all waiters have left and it can be successfully destroyed. */ + + /* FIXME: With requeue_pi, the below check won't work properly. Hence test cases + * that call cond_destroy may not work correctly */ + if (cond->__data.__total_seq == -1ULL && cond->__data.__nwaiters < (1 << COND_CLOCK_BITS)) lll_futex_wake (&cond->__data.__nwaiters, 1); @@ -184,7 +215,11 @@ __pthread_cond_wait (cond, mutex) __pthread_cleanup_pop (&buffer, 0); /* Get the mutex before returning. */ - return __pthread_mutex_cond_lock (mutex); + /* With requeue_pi, the lock is held in the kernel, so just return 0 to application */ + if (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP) + return 0; + else + return __pthread_mutex_cond_lock (mutex); } versioned_symbol (libpthread, __pthread_cond_wait, pthread_cond_wait, diff -uprN glibc-2.5-20061008T1257_org/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S glibc-2.5-20061008T1257/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S --- glibc-2.5-20061008T1257_org/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S 2009-01-19 13:52:14.000000000 +0530 +++ glibc-2.5-20061008T1257/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S 1970-01-01 05:30:00.000000000 +0530 @@ -1,143 +0,0 @@ -/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper , 2002. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include -#include -#include -#include -#include - -#ifdef UP -# define LOCK -#else -# define LOCK lock -#endif - -#define SYS_futex 202 -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 -#define FUTEX_REQUEUE 3 -#define FUTEX_CMP_REQUEUE 4 - -#define EINVAL 22 - - - .text - - /* int pthread_cond_broadcast (pthread_cond_t *cond) */ - .globl __pthread_cond_broadcast - .type __pthread_cond_broadcast, @function - .align 16 -__pthread_cond_broadcast: - - /* Get internal lock. */ - movl $1, %esi - xorl %eax, %eax - LOCK -#if cond_lock == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, cond_lock(%rdi) -#endif - jnz 1f - -2: addq $cond_futex, %rdi - movq total_seq-cond_futex(%rdi), %r9 - cmpq wakeup_seq-cond_futex(%rdi), %r9 - jna 4f - - /* Cause all currently waiting threads to recognize they are - woken up. */ - movq %r9, wakeup_seq-cond_futex(%rdi) - movq %r9, woken_seq-cond_futex(%rdi) - addq %r9, %r9 - movl %r9d, (%rdi) - incl broadcast_seq-cond_futex(%rdi) - - /* Get the address of the mutex used. */ - movq dep_mutex-cond_futex(%rdi), %r8 - - /* Unlock. */ - LOCK - decl cond_lock-cond_futex(%rdi) - jne 7f - -8: cmpq $-1, %r8 - je 9f - - /* XXX: The kernel so far doesn't support requeue to PI futex. */ - testl $PI_BIT, MUTEX_KIND(%r8) - jne 9f - - /* Wake up all threads. */ - movl $FUTEX_CMP_REQUEUE, %esi - movl $SYS_futex, %eax - movl $1, %edx - movl $0x7fffffff, %r10d - syscall - - /* For any kind of error, which mainly is EAGAIN, we try again - with WAKE. The general test also covers running on old - kernels. */ - cmpq $-4095, %rax - jae 9f - -10: xorl %eax, %eax - retq - - .align 16 - /* Unlock. */ -4: LOCK - decl cond_lock-cond_futex(%rdi) - jne 5f - -6: xorl %eax, %eax - retq - - /* Initial locking failed. */ -1: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_lock_wait -#if cond_lock != 0 - subq $cond_lock, %rdi -#endif - jmp 2b - - /* Unlock in loop requires wakeup. */ -5: addq $cond_lock-cond_futex, %rdi - callq __lll_mutex_unlock_wake - jmp 6b - - /* Unlock in loop requires wakeup. */ -7: addq $cond_lock-cond_futex, %rdi - callq __lll_mutex_unlock_wake - subq $cond_lock-cond_futex, %rdi - jmp 8b - -9: /* The futex requeue functionality is not available. */ - movl $0x7fffffff, %edx - movl $FUTEX_WAKE, %esi - movl $SYS_futex, %eax - syscall - jmp 10b - .size __pthread_cond_broadcast, .-__pthread_cond_broadcast -versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast, - GLIBC_2_3_2) diff -uprN glibc-2.5-20061008T1257_org/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S glibc-2.5-20061008T1257/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S --- glibc-2.5-20061008T1257_org/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S 2009-01-19 13:52:14.000000000 +0530 +++ glibc-2.5-20061008T1257/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S 1970-01-01 05:30:00.000000000 +0530 @@ -1,127 +0,0 @@ -/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper , 2002. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include -#include -#include -#include - -#ifdef UP -# define LOCK -#else -# define LOCK lock -#endif - -#define SYS_futex 202 -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 -#define FUTEX_WAKE_OP 5 - -#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1) - -#define EINVAL 22 - - - .text - - /* int pthread_cond_signal (pthread_cond_t *cond) */ - .globl __pthread_cond_signal - .type __pthread_cond_signal, @function - .align 16 -__pthread_cond_signal: - - /* Get internal lock. */ - movq %rdi, %r8 - movl $1, %esi - xorl %eax, %eax - LOCK -#if cond_lock == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, cond_lock(%rdi) -#endif - jnz 1f - -2: addq $cond_futex, %rdi - movq total_seq(%r8), %rcx - cmpq wakeup_seq(%r8), %rcx - jbe 4f - - /* Bump the wakeup number. */ - addq $1, wakeup_seq(%r8) - addl $1, (%rdi) - - /* Wake up one thread. */ - movl $FUTEX_WAKE_OP, %esi - movl $SYS_futex, %eax - movl $1, %edx - movl $1, %r10d -#if cond_lock != 0 - addq $cond_lock, %r8 -#endif - movl $FUTEX_OP_CLEAR_WAKE_IF_GT_ONE, %r9d - syscall -#if cond_lock != 0 - subq $cond_lock, %r8 -#endif - /* For any kind of error, we try again with WAKE. - The general test also covers running on old kernels. */ - cmpq $-4095, %rax - jae 7f - - xorl %eax, %eax - retq - -7: movl $FUTEX_WAKE, %esi - movl $SYS_futex, %eax - /* %rdx should be 1 already from $FUTEX_WAKE_OP syscall. - movl $1, %edx */ - syscall - - /* Unlock. */ -4: LOCK -#if cond_lock == 0 - decl (%r8) -#else - decl cond_lock(%r8) -#endif - jne 5f - -6: xorl %eax, %eax - retq - - /* Initial locking failed. */ -1: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_lock_wait -#if cond_lock != 0 - subq $cond_lock, %rdi -#endif - jmp 2b - - /* Unlock in loop requires wakeup. */ -5: - movq %r8, %rdi - callq __lll_mutex_unlock_wake - jmp 6b - .size __pthread_cond_signal, .-__pthread_cond_signal -versioned_symbol (libpthread, __pthread_cond_signal, pthread_cond_signal, - GLIBC_2_3_2) diff -uprN glibc-2.5-20061008T1257_org/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S glibc-2.5-20061008T1257/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S --- glibc-2.5-20061008T1257_org/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S 2009-01-19 13:52:14.000000000 +0530 +++ glibc-2.5-20061008T1257/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S 1970-01-01 05:30:00.000000000 +0530 @@ -1,470 +0,0 @@ -/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper , 2002. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include -#include -#include -#include - -#ifdef UP -# define LOCK -#else -# define LOCK lock -#endif - -#define SYS_futex 202 -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 - -/* For the calculation see asm/vsyscall.h. */ -#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 - - - .text - -/* int pthread_cond_timedwait (pthread_cond_t *cond, pthread_mutex_t *mutex, - const struct timespec *abstime) */ - .globl __pthread_cond_timedwait - .type __pthread_cond_timedwait, @function - .align 16 -__pthread_cond_timedwait: -.LSTARTCODE: - pushq %r12 -.Lpush_r12: - pushq %r13 -.Lpush_r13: - pushq %r14 -.Lpush_r14: -#define FRAME_SIZE 80 - subq $FRAME_SIZE, %rsp -.Lsubq: - - cmpq $1000000000, 8(%rdx) - movl $EINVAL, %eax - jae 18f - - /* Stack frame: - - rsp + 80 - +--------------------------+ - rsp + 48 | cleanup buffer | - +--------------------------+ - rsp + 40 | old wake_seq value | - +--------------------------+ - rsp + 24 | timeout value | - +--------------------------+ - rsp + 16 | mutex pointer | - +--------------------------+ - rsp + 8 | condvar pointer | - +--------------------------+ - rsp + 4 | old broadcast_seq value | - +--------------------------+ - rsp + 0 | old cancellation mode | - +--------------------------+ - */ - - cmpq $-1, dep_mutex(%rdi) - - /* Prepare structure passed to cancellation handler. */ - movq %rdi, 8(%rsp) - movq %rsi, 16(%rsp) - movq %rdx, %r13 - - je 22f - movq %rsi, dep_mutex(%rdi) - - /* Get internal lock. */ -22: movl $1, %esi - xorl %eax, %eax - LOCK -#if cond_lock == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, cond_lock(%rdi) -#endif - jnz 1f - - /* Unlock the mutex. */ -2: movq 16(%rsp), %rdi - xorl %esi, %esi - callq __pthread_mutex_unlock_usercnt - - testl %eax, %eax - jne 16f - - movq 8(%rsp), %rdi - incq total_seq(%rdi) - incl cond_futex(%rdi) - addl $(1 << clock_bits), cond_nwaiters(%rdi) - - /* Install cancellation handler. */ -#ifdef PIC - leaq __condvar_cleanup(%rip), %rsi -#else - leaq __condvar_cleanup, %rsi -#endif - leaq 48(%rsp), %rdi - movq %rsp, %rdx - callq __pthread_cleanup_push - - /* Get and store current wakeup_seq value. */ - movq 8(%rsp), %rdi - movq wakeup_seq(%rdi), %r9 - movl broadcast_seq(%rdi), %edx - movq %r9, 40(%rsp) - movl %edx, 4(%rsp) - - /* Get the current time. */ -8: -#ifdef __NR_clock_gettime - /* Get the clock number. Note that the field in the condvar - structure stores the number minus 1. */ - movq 8(%rsp), %rdi - movl cond_nwaiters(%rdi), %edi - andl $((1 << clock_bits) - 1), %edi - /* Only clocks 0 and 1 are allowed so far. Both are handled in the - kernel. */ - leaq 24(%rsp), %rsi - movl $__NR_clock_gettime, %eax - syscall -# ifndef __ASSUME_POSIX_TIMERS - cmpq $-ENOSYS, %rax - je 19f -# endif - - /* Compute relative timeout. */ - movq (%r13), %rcx - movq 8(%r13), %rdx - subq 24(%rsp), %rcx - subq 32(%rsp), %rdx -#else - leaq 24(%rsp), %rdi - xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - callq *%rax - - /* Compute relative timeout. */ - movq 32(%rsp), %rax - movl $1000, %edx - mul %rdx /* Milli seconds to nano seconds. */ - movq (%r13), %rcx - movq 8(%r13), %rdx - subq 24(%rsp), %rcx - subq %rax, %rdx -#endif - jns 12f - addq $1000000000, %rdx - decq %rcx -12: testq %rcx, %rcx - movq 8(%rsp), %rdi - movq $-ETIMEDOUT, %r14 - js 6f - - /* Store relative timeout. */ -21: movq %rcx, 24(%rsp) - movq %rdx, 32(%rsp) - - movl cond_futex(%rdi), %r12d - - /* Unlock. */ - LOCK -#if cond_lock == 0 - decl (%rdi) -#else - decl cond_lock(%rdi) -#endif - jne 3f - -4: callq __pthread_enable_asynccancel - movl %eax, (%rsp) - - leaq 24(%rsp), %r10 -#if FUTEX_WAIT == 0 - xorl %esi, %esi -#else - movl $FUTEX_WAIT, %esi -#endif - movq %r12, %rdx - addq $cond_futex, %rdi - movl $SYS_futex, %eax - syscall - movq %rax, %r14 - - movl (%rsp), %edi - callq __pthread_disable_asynccancel - - /* Lock. */ - movq 8(%rsp), %rdi - movl $1, %esi - xorl %eax, %eax - LOCK -#if cond_lock == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, cond_lock(%rdi) -#endif - jne 5f - -6: movl broadcast_seq(%rdi), %edx - - movq woken_seq(%rdi), %rax - - movq wakeup_seq(%rdi), %r9 - - cmpl 4(%rsp), %edx - jne 23f - - cmpq 40(%rsp), %r9 - jbe 15f - - cmpq %rax, %r9 - ja 9f - -15: cmpq $-ETIMEDOUT, %r14 - jne 8b - -13: incq wakeup_seq(%rdi) - incl cond_futex(%rdi) - movl $ETIMEDOUT, %r14d - jmp 14f - -23: xorq %r14, %r14 - jmp 24f - -9: xorq %r14, %r14 -14: incq woken_seq(%rdi) - -24: subl $(1 << clock_bits), cond_nwaiters(%rdi) - - /* Wake up a thread which wants to destroy the condvar object. */ - cmpq $0xffffffffffffffff, total_seq(%rdi) - jne 25f - movl cond_nwaiters(%rdi), %eax - andl $~((1 << clock_bits) - 1), %eax - jne 25f - - addq $cond_nwaiters, %rdi - movl $SYS_futex, %eax - movl $FUTEX_WAKE, %esi - movl $1, %edx - syscall - subq $cond_nwaiters, %rdi - -25: LOCK -#if cond_lock == 0 - decl (%rdi) -#else - decl cond_lock(%rdi) -#endif - jne 10f - - /* Remove cancellation handler. */ -11: movq 48+CLEANUP_PREV(%rsp), %rdx - movq %rdx, %fs:CLEANUP - - movq 16(%rsp), %rdi - callq __pthread_mutex_cond_lock - - testq %rax, %rax - cmoveq %r14, %rax - -18: addq $FRAME_SIZE, %rsp -.Laddq: - popq %r14 -.Lpop_r14: - popq %r13 -.Lpop_r13: - popq %r12 -.Lpop_r12: - - retq - - /* Initial locking failed. */ -1: -.LSbl1: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_lock_wait - jmp 2b - - /* Unlock in loop requires wakeup. */ -3: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_unlock_wake - jmp 4b - - /* Locking in loop failed. */ -5: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_lock_wait -#if cond_lock != 0 - subq $cond_lock, %rdi -#endif - jmp 6b - - /* Unlock after loop requires wakeup. */ -10: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_unlock_wake - jmp 11b - - /* The initial unlocking of the mutex failed. */ -16: movq 8(%rsp), %rdi - movq %rax, (%rsp) - LOCK -#if cond_lock == 0 - decl (%rdi) -#else - decl cond_lock(%rdi) -#endif - jne 17f - -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_unlock_wake - -17: movq (%rsp), %rax - jmp 18b - -#if defined __NR_clock_gettime && !defined __ASSUME_POSIX_TIMERS - /* clock_gettime not available. */ -19: leaq 24(%rsp), %rdi - xorl %esi, %esi - movq $VSYSCALL_ADDR_vgettimeofday, %rax - callq *%rax - - /* Compute relative timeout. */ - movq 32(%rsp), %rax - movl $1000, %edx - mul %rdx /* Milli seconds to nano seconds. */ - movq (%r13), %rcx - movq 8(%r13), %rdx - subq 24(%rsp), %rcx - subq %rax, %rdx - jns 20f - addq $1000000000, %rdx - decq %rcx -20: testq %rcx, %rcx - movq 8(%rsp), %rdi - movq $-ETIMEDOUT, %r14 - js 6b - jmp 21b -#endif -.LENDCODE: - .size __pthread_cond_timedwait, .-__pthread_cond_timedwait -versioned_symbol (libpthread, __pthread_cond_timedwait, pthread_cond_timedwait, - GLIBC_2_3_2) - - - .section .eh_frame,"a",@progbits -.LSTARTFRAME: - .long L(ENDCIE)-L(STARTCIE) # Length of the CIE. -.LSTARTCIE: - .long 0 # CIE ID. - .byte 1 # Version number. -#ifdef SHARED - .string "zR" # NUL-terminated augmentation - # string. -#else - .ascii "\0" # NUL-terminated augmentation - # string. -#endif - .uleb128 1 # Code alignment factor. - .sleb128 -8 # Data alignment factor. - .byte 16 # Return address register - # column. -#ifdef SHARED - .uleb128 1 # Augmentation value length. - .byte 0x1b # Encoding: DW_EH_PE_pcrel - # + DW_EH_PE_sdata4. -#endif - .byte 0x0c # DW_CFA_def_cfa - .uleb128 7 - .uleb128 8 - .byte 0x90 # DW_CFA_offset, column 0x8 - .uleb128 1 - .align 8 -.LENDCIE: - - .long .LENDFDE-.LSTARTFDE # Length of the FDE. -.LSTARTFDE: - .long .LSTARTFDE-.LSTARTFRAME # CIE pointer. -#ifdef SHARED - .long .LSTARTCODE-. # PC-relative start address - # of the code -#else - .long .LSTARTCODE # Start address of the code. -#endif - .long .LENDCODE-.LSTARTCODE # Length of the code. -#ifdef SHARED - .uleb128 0 # No augmentation data. -#endif - .byte 0x40+.Lpush_r12-.LSTARTCODE # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 16 - .byte 0x8c # DW_CFA_offset %r12 - .uleb128 2 - .byte 0x40+.Lpush_r13-.Lpush_r12 # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 24 - .byte 0x8d # DW_CFA_offset %r13 - .uleb128 3 - .byte 0x40+.Lpush_r14-.Lpush_r13 # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 32 - .byte 0x84 # DW_CFA_offset %r14 - .uleb128 4 - .byte 0x40+.Lsubq-.Lpush_r14 # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 32+FRAME_SIZE - .byte 3 # DW_CFA_advance_loc2 - .2byte .Laddq-.Lsubq - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 32 - .byte 0x40+.Lpop_r14-.Laddq # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 24 - .byte 0xce # DW_CFA_restore %r14 - .byte 0x40+.Lpop_r13-.Lpop_r14 # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 16 - .byte 0xcd # DW_CFA_restore %r13 - .byte 0x40+.Lpop_r12-.Lpop_r13 # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 8 - .byte 0xcc # DW_CFA_restore %r12 - .byte 0x40+.LSbl1-.Lpop_r12 # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 32+FRAME_SIZE - .byte 0x8c # DW_CFA_offset %r12 - .uleb128 2 - .byte 0x8d # DW_CFA_offset %r13 - .uleb128 3 - .byte 0x84 # DW_CFA_offset %r14 - .uleb128 4 - .align 8 -.LENDFDE: diff -uprN glibc-2.5-20061008T1257_org/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S glibc-2.5-20061008T1257/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S --- glibc-2.5-20061008T1257_org/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S 2009-01-19 13:52:14.000000000 +0530 +++ glibc-2.5-20061008T1257/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S 1970-01-01 05:30:00.000000000 +0530 @@ -1,429 +0,0 @@ -/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper , 2002. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include -#include -#include -#include - -#ifdef UP -# define LOCK -#else -# define LOCK lock -#endif - -#define SYS_futex 202 -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 - - - .text - - .align 16 - .type __condvar_cleanup, @function - .globl __condvar_cleanup - .hidden __condvar_cleanup -__condvar_cleanup: - pushq %r12 - - /* Get internal lock. */ - movq %rdi, %r8 - movq 8(%rdi), %rdi - movl $1, %esi - xorl %eax, %eax - LOCK -#if cond_lock == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, cond_lock(%rdi) -#endif - jz 1f - -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_lock_wait -#if cond_lock != 0 - subq $cond_lock, %rdi -#endif - -1: movl broadcast_seq(%rdi), %edx - cmpl 4(%r8), %edx - jne 3f - - /* We increment the wakeup_seq counter only if it is lower than - total_seq. If this is not the case the thread was woken and - then canceled. In this case we ignore the signal. */ - movq total_seq(%rdi), %rax - cmpq wakeup_seq(%rdi), %rax - jbe 6f - incq wakeup_seq(%rdi) - incl cond_futex(%rdi) -6: incq woken_seq(%rdi) - -3: subl $(1 << clock_bits), cond_nwaiters(%rdi) - - /* Wake up a thread which wants to destroy the condvar object. */ - xorq %r12, %r12 - cmpq $0xffffffffffffffff, total_seq(%rdi) - jne 4f - movl cond_nwaiters(%rdi), %eax - andl $~((1 << clock_bits) - 1), %eax - jne 4f - - addq $cond_nwaiters, %rdi - movl $SYS_futex, %eax - movl $FUTEX_WAKE, %esi - movl $1, %edx - syscall - subq $cond_nwaiters, %rdi - movl $1, %r12d - -4: LOCK -#if cond_lock == 0 - decl (%rdi) -#else - decl cond_lock(%rdi) -#endif - je 2f -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_unlock_wake - - /* Wake up all waiters to make sure no signal gets lost. */ -2: testq %r12, %r12 - jnz 5f - addq $cond_futex, %rdi - movl $FUTEX_WAKE, %esi - movl $0x7fffffff, %edx - movl $SYS_futex, %eax - syscall - -5: movq 16(%r8), %rdi - callq __pthread_mutex_cond_lock - - popq %r12 - - retq - .size __condvar_cleanup, .-__condvar_cleanup - - -/* int pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex) */ - .globl __pthread_cond_wait - .type __pthread_cond_wait, @function - .align 16 -__pthread_cond_wait: -.LSTARTCODE: - pushq %r12 -.Lpush_r12: -#define FRAME_SIZE 64 - subq $FRAME_SIZE, %rsp -.Lsubq: - /* Stack frame: - - rsp + 64 - +--------------------------+ - rsp + 32 | cleanup buffer | - +--------------------------+ - rsp + 24 | old wake_seq value | - +--------------------------+ - rsp + 16 | mutex pointer | - +--------------------------+ - rsp + 8 | condvar pointer | - +--------------------------+ - rsp + 4 | old broadcast_seq value | - +--------------------------+ - rsp + 0 | old cancellation mode | - +--------------------------+ - */ - - cmpq $-1, dep_mutex(%rdi) - - /* Prepare structure passed to cancellation handler. */ - movq %rdi, 8(%rsp) - movq %rsi, 16(%rsp) - - je 15f - movq %rsi, dep_mutex(%rdi) - - /* Get internal lock. */ -15: movl $1, %esi - xorl %eax, %eax - LOCK -#if cond_lock == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, cond_lock(%rdi) -#endif - jne 1f - - /* Unlock the mutex. */ -2: movq 16(%rsp), %rdi - xorl %esi, %esi - callq __pthread_mutex_unlock_usercnt - - testl %eax, %eax - jne 12f - - movq 8(%rsp), %rdi - incq total_seq(%rdi) - incl cond_futex(%rdi) - addl $(1 << clock_bits), cond_nwaiters(%rdi) - - /* Install cancellation handler. */ -#ifdef PIC - leaq __condvar_cleanup(%rip), %rsi -#else - leaq __condvar_cleanup, %rsi -#endif - leaq 32(%rsp), %rdi - movq %rsp, %rdx - callq __pthread_cleanup_push - - /* Get and store current wakeup_seq value. */ - movq 8(%rsp), %rdi - movq wakeup_seq(%rdi), %r9 - movl broadcast_seq(%rdi), %edx - movq %r9, 24(%rsp) - movl %edx, 4(%rsp) - - /* Unlock. */ -8: movl cond_futex(%rdi), %r12d - LOCK -#if cond_lock == 0 - decl (%rdi) -#else - decl cond_lock(%rdi) -#endif - jne 3f - -4: callq __pthread_enable_asynccancel - movl %eax, (%rsp) - - movq 8(%rsp), %rdi - xorq %r10, %r10 - movq %r12, %rdx - addq $cond_futex-cond_lock, %rdi - movl $SYS_futex, %eax -#if FUTEX_WAIT == 0 - xorl %esi, %esi -#else - movl $FUTEX_WAIT, %esi -#endif - syscall - - movl (%rsp), %edi - callq __pthread_disable_asynccancel - - /* Lock. */ - movq 8(%rsp), %rdi - movl $1, %esi - xorl %eax, %eax - LOCK -#if cond_lock == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, cond_lock(%rdi) -#endif - jnz 5f - -6: movl broadcast_seq(%rdi), %edx - - movq woken_seq(%rdi), %rax - - movq wakeup_seq(%rdi), %r9 - - cmpl 4(%rsp), %edx - jne 16f - - cmpq 24(%rsp), %r9 - jbe 8b - - cmpq %rax, %r9 - jna 8b - - incq woken_seq(%rdi) - - /* Unlock */ -16: subl $(1 << clock_bits), cond_nwaiters(%rdi) - - /* Wake up a thread which wants to destroy the condvar object. */ - cmpq $0xffffffffffffffff, total_seq(%rdi) - jne 17f - movl cond_nwaiters(%rdi), %eax - andl $~((1 << clock_bits) - 1), %eax - jne 17f - - addq $cond_nwaiters, %rdi - movl $SYS_futex, %eax - movl $FUTEX_WAKE, %esi - movl $1, %edx - syscall - subq $cond_nwaiters, %rdi - -17: LOCK -#if cond_lock == 0 - decl (%rdi) -#else - decl cond_lock(%rdi) -#endif - jne 10f - - /* Remove cancellation handler. */ -11: movq 32+CLEANUP_PREV(%rsp), %rdx - movq %rdx, %fs:CLEANUP - - movq 16(%rsp), %rdi - callq __pthread_mutex_cond_lock -14: addq $FRAME_SIZE, %rsp -.Laddq: - - popq %r12 -.Lpop_r12: - - /* We return the result of the mutex_lock operation. */ - retq - - /* Initial locking failed. */ -1: -.LSbl1: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_lock_wait - jmp 2b - - /* Unlock in loop requires wakeup. */ -3: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_unlock_wake - jmp 4b - - /* Locking in loop failed. */ -5: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_lock_wait -#if cond_lock != 0 - subq $cond_lock, %rdi -#endif - jmp 6b - - /* Unlock after loop requires wakeup. */ -10: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_unlock_wake - jmp 11b - - /* The initial unlocking of the mutex failed. */ -12: movq %rax, %r10 - movq 8(%rsp), %rdi - LOCK -#if cond_lock == 0 - decl (%rdi) -#else - decl cond_lock(%rdi) -#endif - jne 13f - -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - callq __lll_mutex_unlock_wake - -13: movq %r10, %rax - jmp 14b -.LENDCODE: - .size __pthread_cond_wait, .-__pthread_cond_wait -versioned_symbol (libpthread, __pthread_cond_wait, pthread_cond_wait, - GLIBC_2_3_2) - - - .section .eh_frame,"a",@progbits -.LSTARTFRAME: - .long L(ENDCIE)-L(STARTCIE) # Length of the CIE. -.LSTARTCIE: - .long 0 # CIE ID. - .byte 1 # Version number. -#ifdef SHARED - .string "zR" # NUL-terminated augmentation - # string. -#else - .ascii "\0" # NUL-terminated augmentation - # string. -#endif - .uleb128 1 # Code alignment factor. - .sleb128 -8 # Data alignment factor. - .byte 16 # Return address register - # column. -#ifdef SHARED - .uleb128 1 # Augmentation value length. - .byte 0x1b # Encoding: DW_EH_PE_pcrel - # + DW_EH_PE_sdata4. -#endif - .byte 0x0c # DW_CFA_def_cfa - .uleb128 7 - .uleb128 8 - .byte 0x90 # DW_CFA_offset, column 0x8 - .uleb128 1 - .align 8 -.LENDCIE: - - .long .LENDFDE-.LSTARTFDE # Length of the FDE. -.LSTARTFDE: - .long .LSTARTFDE-.LSTARTFRAME # CIE pointer. -#ifdef SHARED - .long .LSTARTCODE-. # PC-relative start address - # of the code -#else - .long .LSTARTCODE # Start address of the code. -#endif - .long .LENDCODE-.LSTARTCODE # Length of the code. -#ifdef SHARED - .uleb128 0 # No augmentation data. -#endif - .byte 0x40+.Lpush_r12-.LSTARTCODE # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 16 - .byte 0x8c # DW_CFA_offset %r12 - .uleb128 2 - .byte 0x40+.Lsubq-.Lpush_r12 # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 16+FRAME_SIZE - .byte 3 # DW_CFA_advance_loc2 - .2byte .Laddq-.Lsubq - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 16 - .byte 0x40+.Lpop_r12-.Laddq # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 8 - .byte 0xcc # DW_CFA_restore %r12 - .byte 0x40+.LSbl1-.Lpop_r12 # DW_CFA_advance_loc+N - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 80 - .byte 0x8c # DW_CFA_offset %r12 - .uleb128 2 - .align 8 -.LENDFDE: --------------060306000605070902060600-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/