diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/i486')
13 files changed, 586 insertions, 164 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/libc-lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/libc-lowlevellock.S index 88885b735d..830f628578 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/libc-lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/libc-lowlevellock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -17,14 +17,19 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -/* In libc.so we do not unconditionally use the lock prefix. Only if - the application is using threads. */ -#ifndef UP -# define LOCK \ - cmpl $0, %gs:MULTIPLE_THREADS_OFFSET; \ - je 0f; \ - lock; \ -0: +#include <kernel-features.h> + +/* All locks in libc are private. Use the kernel feature if possible. */ +#define FUTEX_PRIVATE_FLAG 128 +#ifdef __ASSUME_PRIVATE_FUTEX +# define FUTEX_WAIT (0 | FUTEX_PRIVATE_FLAG) +# define FUTEX_WAKE (1 | FUTEX_PRIVATE_FLAG) +#else +# define LOAD_FUTEX_WAIT(reg) \ + movl %gs:PRIVATE_FUTEX, reg +# define LOAD_FUTEX_WAKE(reg) \ + movl %gs:PRIVATE_FUTEX, reg ; \ + orl $FUTEX_WAKE, reg #endif #include "lowlevellock.S" diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S index e2da5b04cf..cfcc7dafc4 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -32,8 +32,22 @@ #define SYS_gettimeofday __NR_gettimeofday #define SYS_futex 240 -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 +#ifndef FUTEX_WAIT +# define FUTEX_WAIT 0 +# define FUTEX_WAKE 1 +#endif + +#ifndef LOAD_FUTEX_WAIT +# if FUTEX_WAIT == 0 +# define LOAD_FUTEX_WAIT(reg) \ + xorl reg, reg +# else +# define LOAD_FUTEX_WAIT(reg) \ + movl $FUTEX_WAIT, reg +# endif +# define LOAD_FUTEX_WAKE(reg) \ + movl $FUTEX_WAKE, reg +#endif .globl __lll_mutex_lock_wait @@ -55,7 +69,7 @@ __lll_mutex_lock_wait: movl $2, %edx movl %ecx, %ebx xorl %esi, %esi /* No timeout. */ - xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ + LOAD_FUTEX_WAIT (%ecx) cmpl %edx, %eax /* NB: %edx == 2 */ jne 2f @@ -151,7 +165,7 @@ __lll_mutex_timedlock_wait: /* Futex call. */ movl %esp, %esi - xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ + LOAD_FUTEX_WAIT (%ecx) movl $SYS_futex, %eax ENTER_KERNEL movl %eax, %ecx @@ -205,35 +219,6 @@ __lll_mutex_timedlock_wait: #endif -#ifdef NOT_IN_libc - .globl lll_unlock_wake_cb - .type lll_unlock_wake_cb,@function - .hidden lll_unlock_wake_cb - .align 16 -lll_unlock_wake_cb: - pushl %ebx - pushl %ecx - pushl %edx - - movl 20(%esp), %ebx - LOCK - subl $1, (%ebx) - je 1f - - movl $FUTEX_WAKE, %ecx - movl $1, %edx /* Wake one thread. */ - movl $SYS_futex, %eax - movl $0, (%ebx) - ENTER_KERNEL - -1: popl %edx - popl %ecx - popl %ebx - ret - .size lll_unlock_wake_cb,.-lll_unlock_wake_cb -#endif - - .globl __lll_mutex_unlock_wake .type __lll_mutex_unlock_wake,@function .hidden __lll_mutex_unlock_wake @@ -252,7 +237,7 @@ __lll_mutex_unlock_wake: movl %eax, %ebx movl $0, (%eax) - movl $FUTEX_WAKE, %ecx + LOAD_FUTEX_WAKE (%ecx) movl $1, %edx /* Wake one thread. */ movl $SYS_futex, %eax ENTER_KERNEL @@ -314,6 +299,8 @@ __lll_timedwait_tid: jz 4f movl %esp, %esi + /* XXX The kernel so far uses global futex for the wakeup at + all times. */ xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ movl %ebp, %ebx movl $SYS_futex, %eax diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S index fe7a8b9c66..29857195f0 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -69,7 +69,13 @@ pthread_barrier_wait: /* Wait for the remaining threads. The call will return immediately if the CURR_EVENT memory has meanwhile been changed. */ -7: xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ +7: +#if FUTEX_WAIT == 0 + movl PRIVATE(%ebx), %ecx +#else + movl $FUTEX_WAIT, %ecx + orl PRIVATE(%ebx), %ecx +#endif xorl %esi, %esi 8: movl $SYS_futex, %eax ENTER_KERNEL @@ -120,6 +126,7 @@ pthread_barrier_wait: so 0x7fffffff is the highest value. */ movl $0x7fffffff, %edx movl $FUTEX_WAKE, %ecx + orl PRIVATE(%ebx), %ecx movl $SYS_futex, %eax ENTER_KERNEL diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S index f481a8e43c..93f4d56b32 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -87,7 +87,7 @@ __pthread_cond_timedwait: addl $1, total_seq(%ebx) adcl $0, total_seq+4(%ebx) addl $1, cond_futex(%ebx) - addl $(1 << clock_bits), cond_nwaiters(%ebx) + addl $(1 << nwaiters_shift), cond_nwaiters(%ebx) #define FRAME_SIZE 24 subl $FRAME_SIZE, %esp @@ -106,7 +106,7 @@ __pthread_cond_timedwait: #ifdef __NR_clock_gettime /* Get the clock number. */ movl cond_nwaiters(%ebx), %ebx - andl $((1 << clock_bits) - 1), %ebx + andl $((1 << nwaiters_shift) - 1), %ebx /* Only clocks 0 and 1 are allowed so far. Both are handled in the kernel. */ leal 4(%esp), %ecx @@ -228,7 +228,7 @@ __pthread_cond_timedwait: 14: addl $1, woken_seq(%ebx) adcl $0, woken_seq+4(%ebx) -24: subl $(1 << clock_bits), cond_nwaiters(%ebx) +24: subl $(1 << nwaiters_shift), cond_nwaiters(%ebx) /* Wake up a thread which wants to destroy the condvar object. */ movl total_seq(%ebx), %eax @@ -236,7 +236,7 @@ __pthread_cond_timedwait: cmpl $0xffffffff, %eax jne 25f movl cond_nwaiters(%ebx), %eax - andl $~((1 << clock_bits) - 1), %eax + andl $~((1 << nwaiters_shift) - 1), %eax jne 25f addl $cond_nwaiters, %ebx @@ -424,7 +424,7 @@ __condvar_tw_cleanup: 7: addl $1, woken_seq(%ebx) adcl $0, woken_seq+4(%ebx) -3: subl $(1 << clock_bits), cond_nwaiters(%ebx) +3: subl $(1 << nwaiters_shift), cond_nwaiters(%ebx) /* Wake up a thread which wants to destroy the condvar object. */ xorl %edi, %edi @@ -433,7 +433,7 @@ __condvar_tw_cleanup: cmpl $0xffffffff, %eax jne 4f movl cond_nwaiters(%ebx), %eax - andl $~((1 << clock_bits) - 1), %eax + andl $~((1 << nwaiters_shift) - 1), %eax jne 4f addl $cond_nwaiters, %ebx diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S index f16c7d9198..c92cfbc718 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -80,7 +80,7 @@ __pthread_cond_wait: addl $1, total_seq(%ebx) adcl $0, total_seq+4(%ebx) addl $1, cond_futex(%ebx) - addl $(1 << clock_bits), cond_nwaiters(%ebx) + addl $(1 << nwaiters_shift), cond_nwaiters(%ebx) #define FRAME_SIZE 16 subl $FRAME_SIZE, %esp @@ -157,7 +157,7 @@ __pthread_cond_wait: adcl $0, woken_seq+4(%ebx) /* Unlock */ -16: subl $(1 << clock_bits), cond_nwaiters(%ebx) +16: subl $(1 << nwaiters_shift), cond_nwaiters(%ebx) /* Wake up a thread which wants to destroy the condvar object. */ movl total_seq(%ebx), %eax @@ -165,7 +165,7 @@ __pthread_cond_wait: cmpl $0xffffffff, %eax jne 17f movl cond_nwaiters(%ebx), %eax - andl $~((1 << clock_bits) - 1), %eax + andl $~((1 << nwaiters_shift) - 1), %eax jne 17f addl $cond_nwaiters, %ebx @@ -315,7 +315,7 @@ __condvar_w_cleanup: 7: addl $1, woken_seq(%ebx) adcl $0, woken_seq+4(%ebx) -3: subl $(1 << clock_bits), cond_nwaiters(%ebx) +3: subl $(1 << nwaiters_shift), cond_nwaiters(%ebx) /* Wake up a thread which wants to destroy the condvar object. */ xorl %edi, %edi @@ -324,7 +324,7 @@ __condvar_w_cleanup: cmpl $0xffffffff, %eax jne 4f movl cond_nwaiters(%ebx), %eax - andl $~((1 << clock_bits) - 1), %eax + andl $~((1 << nwaiters_shift) - 1), %eax jne 4f addl $cond_nwaiters, %ebx diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S index db0639d21c..c61c697985 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -61,7 +61,7 @@ __pthread_rwlock_rdlock: jne 14f cmpl $0, WRITERS_QUEUED(%ebx) je 5f - cmpl $0, FLAGS(%ebx) + cmpb $0, FLAGS(%ebx) je 5f 3: addl $1, READERS_QUEUED(%ebx) @@ -77,8 +77,18 @@ __pthread_rwlock_rdlock: #endif jne 10f -11: addl $READERS_WAKEUP, %ebx - movl %esi, %ecx /* movl $FUTEX_WAIT, %ecx */ +11: +#if __ASSUME_PRIVATE_FUTEX + movzbl PSHARED(%ebx), %ecx + xorl $FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %ecx +#else + movzbl PSHARED(%ebx), %ecx +# if FUTEX_WAIT != 0 + orl $FUTEX_WAIT, %ecx +# endif + xorl %gs:PRIVATE_FUTEX, %ecx +#endif + addl $READERS_WAKEUP, %ebx movl $SYS_futex, %eax ENTER_KERNEL diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S index eb5665b432..c6a584fed0 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -65,7 +65,7 @@ pthread_rwlock_timedrdlock: jne 14f cmpl $0, WRITERS_QUEUED(%ebp) je 5f - cmpl $0, FLAGS(%ebp) + cmpb $0, FLAGS(%ebp) je 5f /* Check the value of the timeout parameter. */ @@ -108,8 +108,18 @@ pthread_rwlock_timedrdlock: /* Futex call. */ movl %ecx, (%esp) /* Store relative timeout. */ movl %edx, 4(%esp) + movl %esi, %edx - xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ +#if __ASSUME_PRIVATE_FUTEX + movzbl PSHARED(%ebp), %ecx + xorl $FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %ecx +#else + movzbl PSHARED(%ebp), %ecx +# if FUTEX_WAIT != 0 + orl $FUTEX_WAIT, %ecx +# endif + xorl %gs:PRIVATE_FUTEX, %ecx +#endif movl %esp, %esi leal READERS_WAKEUP(%ebp), %ebx movl $SYS_futex, %eax diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S index d9db77ba05..5e9faf93fb 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -106,8 +106,18 @@ pthread_rwlock_timedwrlock: /* Futex call. */ movl %ecx, (%esp) /* Store relative timeout. */ movl %edx, 4(%esp) + movl %esi, %edx - xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ +#if __ASSUME_PRIVATE_FUTEX + movzbl PSHARED(%ebp), %ecx + xorl $FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %ecx +#else + movzbl PSHARED(%ebp), %ecx +# if FUTEX_WAIT != 0 + orl $FUTEX_WAIT, %ecx +# endif + xorl %gs:PRIVATE_FUTEX, %ecx +#endif movl %esp, %esi leal WRITERS_WAKEUP(%ebp), %ebx movl $SYS_futex, %eax diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S index 64aac3255a..35c40c2c1c 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -61,9 +61,8 @@ __pthread_rwlock_unlock: 5: movl $0, WRITER(%edi) - movl $1, %ecx + movl $1, %edx leal WRITERS_WAKEUP(%edi), %ebx - movl %ecx, %edx cmpl $0, WRITERS_QUEUED(%edi) jne 0f @@ -83,7 +82,16 @@ __pthread_rwlock_unlock: #endif jne 7f -8: movl $SYS_futex, %eax +8: +#if __ASSUME_PRIVATE_FUTEX + movzbl PSHARED(%edi), %ecx + xorl $FUTEX_PRIVATE_FLAG|FUTEX_WAKE, %ecx +#else + movzbl PSHARED(%edi), %ecx + orl $FUTEX_WAKE, %ecx + xorl %gs:PRIVATE_FUTEX, %ecx +#endif + movl $SYS_futex, %eax ENTER_KERNEL xorl %eax, %eax diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S index ea9cc170db..88044c040b 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -75,8 +75,18 @@ __pthread_rwlock_wrlock: #endif jne 10f -11: addl $WRITERS_WAKEUP, %ebx - movl %esi, %ecx /* movl $FUTEX_WAIT, %ecx */ +11: +#if __ASSUME_PRIVATE_FUTEX + movzbl PSHARED(%ebx), %ecx + xorl $FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %ecx +#else + movzbl PSHARED(%ebx), %ecx +# if FUTEX_WAIT != 0 + orl $FUTEX_WAIT, %ecx +# endif + xorl %gs:PRIVATE_FUTEX, %ecx +#endif + addl $WRITERS_WAKEUP, %ebx movl $SYS_futex, %eax ENTER_KERNEL diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S index 71e96d2228..280dc2fe27 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -20,6 +20,7 @@ #include <sysdep.h> #include <shlib-compat.h> #include <pthread-errnos.h> +#include <structsem.h> #ifndef UP # define LOCK lock @@ -40,19 +41,27 @@ __new_sem_post: pushl %ebx movl 8(%esp), %ebx - movl $1, %edx + LOCK - xaddl %edx, (%ebx) +#if VALUE == 0 + addl $1, (%ebx) +#else + addl $1, VALUE(%ebx) +#endif + + cmpl $0, NWAITERS(%ebx) + je 2f - movl $SYS_futex, %eax movl $FUTEX_WAKE, %ecx - addl $1, %edx + orl PRIVATE(%ebx), %ecx + movl $1, %edx + movl $SYS_futex, %eax ENTER_KERNEL testl %eax, %eax js 1f - xorl %eax, %eax +2: xorl %eax, %eax popl %ebx ret diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S index bf70e17fca..57b5b58186 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S @@ -20,6 +20,7 @@ #include <sysdep.h> #include <shlib-compat.h> #include <pthread-errnos.h> +#include <structsem.h> #ifndef UP # define LOCK lock @@ -29,7 +30,12 @@ #define SYS_gettimeofday __NR_gettimeofday #define SYS_futex 240 -#define FUTEX_WAKE 1 +#define FUTEX_WAIT 0 + + +#if VALUE != 0 +# error "code needs to be rewritten for VALUE != 0" +#endif .text @@ -37,14 +43,8 @@ .globl sem_timedwait .type sem_timedwait,@function .align 16 - cfi_startproc sem_timedwait: - /* First check for cancellation. */ - movl %gs:CANCELHANDLING, %eax - andl $0xfffffff9, %eax - cmpl $8, %eax - je 10f - +.LSTARTCODE: movl 4(%esp), %ecx movl (%ecx), %eax @@ -61,24 +61,24 @@ sem_timedwait: /* Check whether the timeout value is valid. */ 1: pushl %esi - cfi_adjust_cfa_offset(4) +.Lpush_esi: pushl %edi - cfi_adjust_cfa_offset(4) +.Lpush_edi: pushl %ebx - cfi_adjust_cfa_offset(4) +.Lpush_ebx: subl $12, %esp - cfi_adjust_cfa_offset(12) +.Lsub_esp: movl 32(%esp), %edi - cfi_offset(7, -12) /* %edi */ /* Check for invalid nanosecond field. */ cmpl $1000000000, 4(%edi) movl $EINVAL, %esi - cfi_offset(6, -8) /* %esi */ jae 6f - cfi_offset(3, -16) /* %ebx */ + LOCK + incl NWAITERS(%ecx) + 7: xorl %ecx, %ecx movl %esp, %ebx movl %ecx, %edx @@ -103,19 +103,26 @@ sem_timedwait: movl %ecx, (%esp) /* Store relative timeout. */ movl %edx, 4(%esp) +.LcleanupSTART: call __pthread_enable_asynccancel movl %eax, 8(%esp) - movl 28(%esp), %ebx - xorl %ecx, %ecx + movl 28(%esp), %ebx /* Load semaphore address. */ +#if FUTEX_WAIT == 0 + movl PRIVATE(%ebx), %ecx +#else + movl $FUTEX_WAIT, %ecx + orl PRIVATE(%ebx), %ecx +#endif movl %esp, %esi - movl $SYS_futex, %eax xorl %edx, %edx + movl $SYS_futex, %eax ENTER_KERNEL movl %eax, %esi movl 8(%esp), %eax call __pthread_disable_asynccancel +.LcleanupEND: testl %esi, %esi je 9f @@ -131,24 +138,22 @@ sem_timedwait: cmpxchgl %ecx, (%ebx) jne 8b - addl $12, %esp - cfi_adjust_cfa_offset(-12) xorl %eax, %eax + +10: LOCK + decl NWAITERS(%ebx) + + addl $12, %esp +.Ladd_esp: popl %ebx - cfi_adjust_cfa_offset(-4) - cfi_restore(3) +.Lpop_ebx: popl %edi - cfi_adjust_cfa_offset(-4) - cfi_restore(7) +.Lpop_edi: popl %esi - cfi_adjust_cfa_offset(-4) - cfi_restore(6) +.Lpop_esi: ret - cfi_adjust_cfa_offset(24) - cfi_offset(6, -8) /* %esi */ - cfi_offset(7, -12) /* %edi */ - cfi_offset(3, -16) /* %ebx */ +.Lafter_ret: 3: negl %esi 6: #ifdef PIC @@ -172,25 +177,163 @@ sem_timedwait: movl %esi, (%eax) #endif - addl $12, %esp - cfi_adjust_cfa_offset(-12) + movl 28(%esp), %ebx /* Load semaphore address. */ orl $-1, %eax - popl %ebx - cfi_adjust_cfa_offset(-4) - cfi_restore(3) - popl %edi - cfi_adjust_cfa_offset(-4) - cfi_restore(7) - popl %esi - cfi_adjust_cfa_offset(-4) - cfi_restore(6) - ret + jmp 10b + .size sem_timedwait,.-sem_timedwait -10: /* Canceled. */ - movl $0xffffffff, %gs:RESULT + + .type sem_wait_cleanup,@function +sem_wait_cleanup: LOCK - orl $0x10, %gs:CANCELHANDLING - movl %gs:CLEANUP_JMP_BUF, %eax - jmp HIDDEN_JUMPTARGET (__pthread_unwind) - cfi_endproc - .size sem_timedwait,.-sem_timedwait + decl NWAITERS(%ebx) + movl %eax, (%esp) +.LcallUR: + call _Unwind_Resume@PLT + hlt +.LENDCODE: + .size sem_wait_cleanup,.-sem_wait_cleanup + + + .section .gcc_except_table,"a",@progbits +.LexceptSTART: + .byte 0xff # @LPStart format (omit) + .byte 0xff # @TType format (omit) + .byte 0x01 # call-site format + # DW_EH_PE_uleb128 + .uleb128 .Lcstend-.Lcstbegin +.Lcstbegin: + .uleb128 .LcleanupSTART-.LSTARTCODE + .uleb128 .LcleanupEND-.LcleanupSTART + .uleb128 sem_wait_cleanup-.LSTARTCODE + .uleb128 0 + .uleb128 .LcallUR-.LSTARTCODE + .uleb128 .LENDCODE-.LcallUR + .uleb128 0 + .uleb128 0 +.Lcstend: + + + .section .eh_frame,"a",@progbits +.LSTARTFRAME: + .long .LENDCIE-.LSTARTCIE # Length of the CIE. +.LSTARTCIE: + .long 0 # CIE ID. + .byte 1 # Version number. +#ifdef SHARED + .string "zPLR" # NUL-terminated augmentation + # string. +#else + .string "zPL" # NUL-terminated augmentation + # string. +#endif + .uleb128 1 # Code alignment factor. + .sleb128 -4 # Data alignment factor. + .byte 8 # Return address register + # column. +#ifdef SHARED + .uleb128 7 # Augmentation value length. + .byte 0x9b # Personality: DW_EH_PE_pcrel + # + DW_EH_PE_sdata4 + # + DW_EH_PE_indirect + .long DW.ref.__gcc_personality_v0-. + .byte 0x1b # LSDA Encoding: DW_EH_PE_pcrel + # + DW_EH_PE_sdata4. + .byte 0x1b # FDE Encoding: DW_EH_PE_pcrel + # + DW_EH_PE_sdata4. +#else + .uleb128 6 # Augmentation value length. + .byte 0x0 # Personality: absolute + .long __gcc_personality_v0 + .byte 0x0 # LSDA Encoding: absolute +#endif + .byte 0x0c # DW_CFA_def_cfa + .uleb128 4 + .uleb128 4 + .byte 0x88 # DW_CFA_offset, column 0x10 + .uleb128 1 + .align 4 +.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. + .uleb128 4 # Augmentation size +#ifdef SHARED + .long .LexceptSTART-. +#else + .long .LexceptSTART +#endif + + .byte 4 # DW_CFA_advance_loc4 + .long .Lpush_esi-.LSTARTCODE + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 8 + .byte 0x86 # DW_CFA_offset %esi + .uleb128 2 + .byte 4 # DW_CFA_advance_loc4 + .long .Lpush_edi-.Lpush_esi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 12 + .byte 0x87 # DW_CFA_offset %edi + .uleb128 3 + .byte 4 # DW_CFA_advance_loc4 + .long .Lpush_ebx-.Lpush_edi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 16 + .byte 0x83 # DW_CFA_offset %ebx + .uleb128 4 + .byte 4 # DW_CFA_advance_loc4 + .long .Lsub_esp-.Lpush_ebx + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 28 + .byte 4 # DW_CFA_advance_loc4 + .long .Ladd_esp-.Lsub_esp + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 16 + .byte 4 # DW_CFA_advance_loc4 + .long .Lpop_ebx-.Ladd_esp + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 12 + .byte 0xc3 # DW_CFA_restore %ebx + .byte 4 # DW_CFA_advance_loc4 + .long .Lpop_edi-.Lpop_ebx + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 8 + .byte 0xc7 # DW_CFA_restore %edi + .byte 4 # DW_CFA_advance_loc4 + .long .Lpop_esi-.Lpop_edi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 4 + .byte 0xc6 # DW_CFA_restore %esi + .byte 4 # DW_CFA_advance_loc4 + .long .Lafter_ret-.Lpop_esi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 28 + .byte 0x86 # DW_CFA_offset %esi + .uleb128 2 + .byte 0x87 # DW_CFA_offset %edi + .uleb128 3 + .byte 0x83 # DW_CFA_offset %ebx + .uleb128 4 + .align 4 +.LENDFDE: + + +#ifdef SHARED + .hidden DW.ref.__gcc_personality_v0 + .weak DW.ref.__gcc_personality_v0 + .section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits + .align 4 + .type DW.ref.__gcc_personality_v0, @object + .size DW.ref.__gcc_personality_v0, 4 +DW.ref.__gcc_personality_v0: + .long __gcc_personality_v0 +#endif diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S index b1296275d0..d0eef75144 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_wait.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -20,6 +20,7 @@ #include <sysdep.h> #include <shlib-compat.h> #include <pthread-errnos.h> +#include <structsem.h> #ifndef UP # define LOCK lock @@ -28,22 +29,261 @@ #endif #define SYS_futex 240 -#define FUTEX_WAKE 1 +#define FUTEX_WAIT 0 +#if VALUE != 0 +# error "code needs to be rewritten for VALUE != 0" +#endif + .text .globl __new_sem_wait .type __new_sem_wait,@function .align 16 - cfi_startproc __new_sem_wait: - /* First check for cancellation. */ - movl %gs:CANCELHANDLING, %eax - andl $0xfffffff9, %eax - cmpl $8, %eax - je 5f +.LSTARTCODE: + pushl %ebx +.Lpush_ebx: + pushl %esi +.Lpush_esi: + subl $4, %esp +.Lsub_esp: + + movl 16(%esp), %ebx + + movl (%ebx), %eax +2: testl %eax, %eax + je 1f + + leal -1(%eax), %edx + LOCK + cmpxchgl %edx, (%ebx) + jne 2b +7: xorl %eax, %eax + +9: movl 4(%esp), %esi + movl 8(%esp), %ebx + addl $12, %esp +.Ladd_esp: + ret + +.Lafter_ret: +1: LOCK + incl NWAITERS(%ebx) + +.LcleanupSTART: +6: call __pthread_enable_asynccancel + movl %eax, (%esp) + +#if FUTEX_WAIT == 0 + movl PRIVATE(%ebx), %ecx +#else + movl $FUTEX_WAIT, %ecx + orl PRIVATE(%ebx), %ecx +#endif + xorl %esi, %esi + xorl %edx, %edx + movl $SYS_futex, %eax + ENTER_KERNEL + movl %eax, %esi + + movl (%esp), %eax + call __pthread_disable_asynccancel +.LcleanupEND: + + testl %esi, %esi + je 3f + cmpl $-EWOULDBLOCK, %esi + jne 4f + +3: + movl (%ebx), %eax +5: testl %eax, %eax + je 6b + + leal -1(%eax), %edx + LOCK + cmpxchgl %edx, (%ebx) + jne 5b + + LOCK + decl NWAITERS(%ebx) + jmp 7b + +4: LOCK + decl NWAITERS(%ebx) + + negl %esi +#ifdef PIC + call __i686.get_pc_thunk.bx +#else + movl $8f, %ebx +8: +#endif + addl $_GLOBAL_OFFSET_TABLE_, %ebx +#if USE___THREAD +# ifdef NO_TLS_DIRECT_SEG_REFS + movl errno@gotntpoff(%ebx), %edx + addl %gs:0, %edx + movl %esi, (%edx) +# else + movl errno@gotntpoff(%ebx), %edx + movl %esi, %gs:(%edx) +# endif +#else + call __errno_location@plt + movl %esi, (%eax) +#endif + orl $-1, %eax + + jmp 9b + .size __new_sem_wait,.-__new_sem_wait + versioned_symbol(libpthread, __new_sem_wait, sem_wait, GLIBC_2_1) + + + .type sem_wait_cleanup,@function +sem_wait_cleanup: + LOCK + decl NWAITERS(%ebx) + movl %eax, (%esp) +.LcallUR: + call _Unwind_Resume@PLT + hlt +.LENDCODE: + .size sem_wait_cleanup,.-sem_wait_cleanup + + + .section .gcc_except_table,"a",@progbits +.LexceptSTART: + .byte 0xff # @LPStart format (omit) + .byte 0xff # @TType format (omit) + .byte 0x01 # call-site format + # DW_EH_PE_uleb128 + .uleb128 .Lcstend-.Lcstbegin +.Lcstbegin: + .uleb128 .LcleanupSTART-.LSTARTCODE + .uleb128 .LcleanupEND-.LcleanupSTART + .uleb128 sem_wait_cleanup-.LSTARTCODE + .uleb128 0 + .uleb128 .LcallUR-.LSTARTCODE + .uleb128 .LENDCODE-.LcallUR + .uleb128 0 + .uleb128 0 +.Lcstend: + + + .section .eh_frame,"a",@progbits +.LSTARTFRAME: + .long .LENDCIE-.LSTARTCIE # Length of the CIE. +.LSTARTCIE: + .long 0 # CIE ID. + .byte 1 # Version number. +#ifdef SHARED + .string "zPLR" # NUL-terminated augmentation + # string. +#else + .string "zPL" # NUL-terminated augmentation + # string. +#endif + .uleb128 1 # Code alignment factor. + .sleb128 -4 # Data alignment factor. + .byte 8 # Return address register + # column. +#ifdef SHARED + .uleb128 7 # Augmentation value length. + .byte 0x9b # Personality: DW_EH_PE_pcrel + # + DW_EH_PE_sdata4 + # + DW_EH_PE_indirect + .long DW.ref.__gcc_personality_v0-. + .byte 0x1b # LSDA Encoding: DW_EH_PE_pcrel + # + DW_EH_PE_sdata4. + .byte 0x1b # FDE Encoding: DW_EH_PE_pcrel + # + DW_EH_PE_sdata4. +#else + .uleb128 6 # Augmentation value length. + .byte 0x0 # Personality: absolute + .long __gcc_personality_v0 + .byte 0x0 # LSDA Encoding: absolute +#endif + .byte 0x0c # DW_CFA_def_cfa + .uleb128 4 + .uleb128 4 + .byte 0x88 # DW_CFA_offset, column 0x10 + .uleb128 1 + .align 4 +.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. + .uleb128 4 # Augmentation size +#ifdef SHARED + .long .LexceptSTART-. +#else + .long .LexceptSTART +#endif + .byte 4 # DW_CFA_advance_loc4 + .long .Lpush_ebx-.LSTARTCODE + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 8 + .byte 0x83 # DW_CFA_offset %ebx + .uleb128 2 + .byte 4 # DW_CFA_advance_loc4 + .long .Lpush_esi-.Lpush_ebx + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 12 + .byte 0x86 # DW_CFA_offset %esi + .uleb128 3 + .byte 4 # DW_CFA_advance_loc4 + .long .Lsub_esp-.Lpush_esi + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 16 + .byte 4 # DW_CFA_advance_loc4 + .long .Ladd_esp-.Lsub_esp + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 4 + .byte 0xc3 # DW_CFA_restore %ebx + .byte 0xc6 # DW_CFA_restore %esi + .byte 4 # DW_CFA_advance_loc4 + .long .Lafter_ret-.Ladd_esp + .byte 14 # DW_CFA_def_cfa_offset + .uleb128 16 + .byte 0x83 # DW_CFA_offset %ebx + .uleb128 2 + .byte 0x86 # DW_CFA_offset %esi + .uleb128 3 + .align 4 +.LENDFDE: + + +#ifdef SHARED + .hidden DW.ref.__gcc_personality_v0 + .weak DW.ref.__gcc_personality_v0 + .section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits + .align 4 + .type DW.ref.__gcc_personality_v0, @object + .size DW.ref.__gcc_personality_v0, 4 +DW.ref.__gcc_personality_v0: + .long __gcc_personality_v0 +#endif + + +#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) + .section ".text.compat", "ax" + .global __old_sem_wait + .type __old_sem_wait,@function + .align 16 + cfi_startproc +__old_sem_wait: pushl %ebx cfi_adjust_cfa_offset(4) pushl %esi @@ -52,9 +292,9 @@ __new_sem_wait: cfi_adjust_cfa_offset(4) movl 16(%esp), %ebx - cfi_offset(3, -8) /* %ebx */ + cfi_offset(ebx, -8) - cfi_offset(6, -12) /* %esi */ + cfi_offset(esi, -12) 3: movl (%ebx), %eax 2: testl %eax, %eax je 1f @@ -65,17 +305,17 @@ __new_sem_wait: jne 2b xorl %eax, %eax - movl 4(%esp), %esi - cfi_restore(6) +5: movl 4(%esp), %esi movl 8(%esp), %ebx - cfi_restore(3) addl $12, %esp + cfi_restore(ebx) + cfi_restore(esi) cfi_adjust_cfa_offset(-12) ret cfi_adjust_cfa_offset(12) - cfi_offset(3, -8) /* %ebx */ - cfi_offset(6, -12) /* %esi */ + cfi_offset(ebx, -8) + cfi_offset(esi, -12) 1: call __pthread_enable_asynccancel movl %eax, (%esp) @@ -115,25 +355,8 @@ __new_sem_wait: movl %esi, (%eax) #endif orl $-1, %eax - movl 4(%esp), %esi - cfi_restore(6) - movl 8(%esp), %ebx - cfi_restore(3) - addl $12, %esp - cfi_adjust_cfa_offset(-12) - ret - -5: /* Canceled. */ - movl $0xffffffff, %gs:RESULT - LOCK - orl $0x10, %gs:CANCELHANDLING - movl %gs:CLEANUP_JMP_BUF, %eax - jmp HIDDEN_JUMPTARGET (__pthread_unwind) + jmp 5b cfi_endproc - .size __new_sem_wait,.-__new_sem_wait - versioned_symbol(libpthread, __new_sem_wait, sem_wait, GLIBC_2_1) -#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) - .global __old_sem_wait -__old_sem_wait = __new_sem_wait + .size __old_sem_wait,.-__old_sem_wait compat_symbol(libpthread, __old_sem_wait, sem_wait, GLIBC_2_0) #endif |