diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevelrwlock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevelrwlock.S | 654 |
1 files changed, 0 insertions, 654 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevelrwlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevelrwlock.S deleted file mode 100644 index cc2885ebc9..0000000000 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevelrwlock.S +++ /dev/null @@ -1,654 +0,0 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@redhat.com>, 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 <sysdep.h> - - .text - -#define SYS_gettimeofday __NR_gettimeofday -#define SYS_futex 240 -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 - -#define EAGAIN 11 -#define EDEADLK 35 -#define ETIMEDOUT 110 - -/* Offsets in the pthread_rwlock_t structure. */ -#define MUTEX 0 -#define NR_READERS 4 -#define READERS_WAKEUP 8 -#define WRITERS_WAKEUP 12 -#define READERS_QUEUED 16 -#define WRITERS_QUEUED 20 -#define FLAGS 24 -#define WRITER 28 - -#ifndef UP -# define LOCK lock -#else -# define LOCK -#endif - - - .globl __pthread_rwlock_rdlock - .type __pthread_rwlock_rdlock,@function - .align 16 -__pthread_rwlock_rdlock: - pushl %esi - pushl %ebx - - xorl %esi, %esi - xorl %edx, %edx - movl 12(%esp), %ebx - - /* Get the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%ebx) -#else - xaddl %eax, MUTEX(%ebx) -#endif - testl %eax, %eax - jne 1f - -2: movl WRITER(%ebx), %eax - testl %eax, %eax - jne 14f - cmp $0, WRITERS_QUEUED(%ebx) - je 5f - cmpl $0, FLAGS(%ebx) - je 5f - -3: incl READERS_QUEUED(%ebx) - je 4f - - LOCK -#if MUTEX == 0 - decl (%ebx) -#else - decl MUTEX(%ebx) -#endif - jne 10f - -11: addl $READERS_WAKEUP-MUTEX, %ebx - movl %esi, %ecx /* movl $FUTEX_WAIT, %ecx */ - movl $SYS_futex, %eax - ENTER_KERNEL - - subl $READERS_WAKEUP-MUTEX, %ebx - - /* Reget the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%ebx) -#else - xaddl %eax, MUTEX(%ebx) -#endif - testl %eax, %eax - jne 12f - -13: decl READERS_QUEUED(%ebx) - jne 2b - movl $0, READERS_WAKEUP(%ebx) - jmp 2b - -5: xorl %ecx, %ecx - incl NR_READERS(%ebx) - je 8f -9: LOCK -#if MUTEX == 0 - decl (%ebx) -#else - decl MUTEX(%ebx) -#endif - jne 6f -7: - - movl %ecx, %eax - popl %ebx - popl %esi - ret - -1: movl %ebx, %ecx - call __lll_mutex_lock_wait - jmp 2b - -14: cmpl %gs:8, %eax - jne 3b - /* Deadlock detected. */ - movl $EDEADLK, %ecx - jmp 9b - -6: movl %ebx, %eax - call __lll_mutex_unlock_wake - jmp 7b - - /* Overflow. */ -8: decl NR_READERS(%ebx) - movl $EAGAIN, %ecx - jmp 9b - - /* Overflow. */ -4: decl READERS_QUEUED(%ebx) - movl $EAGAIN, %ecx - jmp 9b - -10: movl %ebx, %eax - call __lll_mutex_unlock_wake - jmp 11b - -12: movl %ebx, %ecx - call __lll_mutex_lock_wait - jmp 13b - .size __pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock - - .globl pthread_rwlock_rdlock -pthread_rwlock_rdlock = __pthread_rwlock_rdlock - - .globl __pthread_rwlock_rdlock_internal -__pthread_rwlock_rdlock_internal = __pthread_rwlock_rdlock - - - .globl pthread_rwlock_timedrdlock - .type pthread_rwlock_timedrdlock,@function - .align 16 -pthread_rwlock_timedrdlock: - pushl %esi - pushl %edi - pushl %ebx - pushl %ebp - subl $8, %esp - - movl 28(%esp), %ebp - movl 32(%esp), %edi - - /* Get the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%ebp) -#else - xaddl %eax, MUTEX(%ebp) -#endif - testl %eax, %eax - jne 1f - -2: movl WRITER(%ebp), %eax - testl %eax, %eax - jne 14f - cmp $0, WRITERS_QUEUED(%ebp) - je 5f - cmpl $0, FLAGS(%ebp) - je 5f - -3: incl READERS_QUEUED(%ebp) - je 4f - - LOCK -#if MUTEX == 0 - decl (%ebp) -#else - decl MUTEX(%ebp) -#endif - jne 10f - - /* Get current time. */ - movl %esp, %ebx - xorl %ecx, %ecx - movl $SYS_gettimeofday, %eax - ENTER_KERNEL - - /* Compute relative timeout. */ - movl 4(%esp), %eax - movl $1000, %edx - mul %edx /* Milli seconds to nano seconds. */ - movl (%edi), %ecx - movl 4(%edi), %edx - subl (%esp), %ecx - subl %eax, %edx - jns 15f - addl $1000000000, %edx - decl %ecx -15: testl %ecx, %ecx - js 16f /* Time is already up. */ - - /* Futex call. */ - movl %ecx, (%esp) /* Store relative timeout. */ - movl %edx, 4(%esp) - xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ - movl %esp, %esi - movl %ecx, %edx - leal READERS_WAKEUP(%ebp), %ebx - movl $SYS_futex, %eax - ENTER_KERNEL - movl %eax, %edx -17: - - /* Reget the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%ebp) -#else - xaddl %eax, MUTEX(%ebp) -#endif - testl %eax, %eax - jne 12f - -13: cmpl $-ETIMEDOUT, %ecx - je 18f - decl READERS_QUEUED(%ebp) - jne 2b - movl $0, READERS_WAKEUP(%ebp) - jmp 2b - - -5: xorl %ecx, %ecx - incl NR_READERS(%ebp) - je 8f -9: LOCK -#if MUTEX == 0 - decl (%ebp) -#else - decl MUTEX(%ebp) -#endif - jne 6f - -7: movl %ecx, %eax - - addl $8, %esp - popl %ebp - popl %ebx - popl %edi - popl %esi - ret - -1: movl %ebp, %ecx - call __lll_mutex_lock_wait - jmp 2b - -14: cmpl %gs:8, %eax - jne 3b - movl $EDEADLK, %ecx - jmp 9b - -6: movl %ebp, %eax - call __lll_mutex_unlock_wake - jmp 7b - - /* Overflow. */ -8: decl NR_READERS(%ebp) - movl $EAGAIN, %ecx - jmp 9b - - /* Overflow. */ -4: decl READERS_QUEUED(%ebp) - movl $EAGAIN, %ecx - jmp 9b - -10: movl %ebp, %eax - call __lll_mutex_unlock_wake - jmp 11b - -12: movl %ebx, %ecx - call __lll_mutex_lock_wait - jmp 13b - -16: movl $-ETIMEDOUT, %ecx - jmp 17b - -18: movl $ETIMEDOUT, %ecx - jmp 9b - .size pthread_rwlock_timedrdlock,.-pthread_rwlock_timedrdlock - - - .globl __pthread_rwlock_wrlock - .type __pthread_rwlock_wrlock,@function - .align 16 -__pthread_rwlock_wrlock: - pushl %esi - pushl %ebx - - xorl %esi, %esi - xorl %edx, %edx - movl 12(%esp), %ebx - - /* Get the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%ebx) -#else - xaddl %eax, MUTEX(%ebx) -#endif - testl %eax, %eax - jne 1f - -2: movl WRITER(%ebx), %eax - testl %eax, %eax - jne 14f - cmp $0, NR_READERS(%ebx) - je 5f - -3: incl WRITERS_QUEUED(%ebx) - je 4f - - LOCK -#if MUTEX == 0 - decl (%ebx) -#else - decl MUTEX(%ebx) -#endif - jne 10f - -11: addl $WRITERS_WAKEUP-MUTEX, %ebx - movl %esi, %ecx /* movl $FUTEX_WAIT, %ecx */ - movl $SYS_futex, %eax - ENTER_KERNEL - - subl $WRITERS_WAKEUP-MUTEX, %ebx - - /* Reget the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%ebx) -#else - xaddl %eax, MUTEX(%ebx) -#endif - testl %eax, %eax - jne 12f - -13: decl WRITERS_QUEUED(%ebx) - movl $0, WRITERS_WAKEUP(%ebx) - jmp 2b - -5: xorl %ecx, %ecx - movl %gs:8, %eax - movl %eax, WRITER(%ebx) -9: LOCK -#if MUTEX == 0 - decl (%ebx) -#else - decl MUTEX(%ebx) -#endif - jne 6f -7: - - movl %ecx, %eax - popl %ebx - popl %esi - ret - -1: movl %ebx, %ecx - call __lll_mutex_lock_wait - jmp 2b - -14: cmpl %gs:8, %eax - jne 3b - movl $EDEADLK, %ecx - jmp 9b - -6: movl %ebx, %eax - call __lll_mutex_unlock_wake - jmp 7b - -4: decl WRITERS_QUEUED(%ebx) - movl $EAGAIN, %ecx - jmp 9b - -10: movl %ebx, %eax - call __lll_mutex_unlock_wake - jmp 11b - -12: movl %ebx, %ecx - call __lll_mutex_lock_wait - jmp 13b - .size __pthread_rwlock_wrlock,.-__pthread_rwlock_wrlock - - .globl pthread_rwlock_wrlock -pthread_rwlock_wrlock = __pthread_rwlock_wrlock - - .globl __pthread_rwlock_wrlock_internal -__pthread_rwlock_wrlock_internal = __pthread_rwlock_wrlock - - - .globl pthread_rwlock_timedwrlock - .type pthread_rwlock_timedwrlock,@function - .align 16 -pthread_rwlock_timedwrlock: - pushl %esi - pushl %edi - pushl %ebx - pushl %ebp - subl $8, %esp - - movl 28(%esp), %ebp - movl 32(%esp), %edi - - /* Get the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%ebp) -#else - xaddl %eax, MUTEX(%ebp) -#endif - testl %eax, %eax - jne 1f - -2: movl WRITER(%ebp), %eax - testl %eax, %eax - jne 14f - cmp $0, NR_READERS(%ebp) - je 5f - -3: incl WRITERS_QUEUED(%ebp) - je 4f - - LOCK -#if MUTEX == 0 - decl (%ebp) -#else - decl MUTEX(%ebp) -#endif - jne 10f - - /* Get current time. */ - movl %esp, %ebx - xorl %ecx, %ecx - movl $SYS_gettimeofday, %eax - ENTER_KERNEL - - /* Compute relative timeout. */ - movl 4(%esp), %eax - movl $1000, %edx - mul %edx /* Milli seconds to nano seconds. */ - movl (%edi), %ecx - movl 4(%edi), %edx - subl (%esp), %ecx - subl %eax, %edx - jns 15f - addl $1000000000, %edx - decl %ecx -15: testl %ecx, %ecx - js 16f /* Time is already up. */ - - /* Futex call. */ - movl %ecx, (%esp) /* Store relative timeout. */ - movl %edx, 4(%esp) - xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ - movl %esp, %esi - movl %ecx, %edx - leal WRITERS_WAKEUP(%ebp), %ebx - movl $SYS_futex, %eax - ENTER_KERNEL - movl %eax, %edx -17: - - /* Reget the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%ebp) -#else - xaddl %eax, MUTEX(%ebp) -#endif - testl %eax, %eax - jne 12f - -13: cmpl $-ETIMEDOUT, %ecx - je 18f - decl WRITERS_QUEUED(%ebp) - movl $0, WRITERS_WAKEUP(%ebp) - jmp 2b - - -5: xorl %ecx, %ecx - movl %gs:8, %eax - movl %eax, WRITER(%ebp) -9: LOCK -#if MUTEX == 0 - decl (%ebp) -#else - decl MUTEX(%ebp) -#endif - jne 6f - -7: movl %ecx, %eax - - addl $8, %esp - popl %ebp - popl %ebx - popl %edi - popl %esi - ret - -1: movl %ebp, %ecx - call __lll_mutex_lock_wait - jmp 2b - -14: cmpl %gs:8, %eax - jne 3b - movl $EDEADLK, %ecx - jmp 9b - -6: movl %ebp, %eax - call __lll_mutex_unlock_wake - jmp 7b - - /* Overflow. */ -4: decl WRITERS_QUEUED(%ebp) - movl $EAGAIN, %ecx - jmp 9b - -10: movl %ebp, %eax - call __lll_mutex_unlock_wake - jmp 11b - -12: movl %ebx, %ecx - call __lll_mutex_lock_wait - jmp 13b - -16: movl $-ETIMEDOUT, %ecx - jmp 17b - -18: movl $ETIMEDOUT, %ecx - jmp 9b - .size pthread_rwlock_timedwrlock,.-pthread_rwlock_timedwrlock - - .globl __pthread_rwlock_unlock - .type __pthread_rwlock_unlock,@function - .align 16 -__pthread_rwlock_unlock: - pushl %ebx - pushl %esi - pushl %edi - - xorl %esi, %esi - xorl %edx, %edx - movl 16(%esp), %edi - - /* Get the lock. */ - movl $1, %eax - LOCK -#if MUTEX == 0 - xaddl %eax, (%edi) -#else - xaddl %eax, MUTEX(%edi) -#endif - testl %eax, %eax - jne 1f - -2: cmpl $0, WRITER(%edi) - jne 5f - decl NR_READERS(%edi) - jnz 6f - -5: movl $0, WRITER(%edi) - - movl $0x7fffffff, %edx - leal READERS_WAKEUP(%edi), %ebx - movl $1, %ecx - leal WRITERS_WAKEUP(%edi), %eax - cmpl $0, WRITERS_QUEUED(%edi) -#ifdef HAVE_CMOV - cmovnel %ecx, %edx - cmovnel %eax, %ebx -#else - je 0f - movl %ecx, %edx - movl %eax, %ebx -0: -#endif - movl $SYS_futex, %eax - ENTER_KERNEL - -6: LOCK -#if MUTEX == 0 - decl (%edi) -#else - decl MUTEX(%edi) -#endif - jne 3f - -4: xorl %eax, %eax - popl %edi - popl %esi - popl %ebx - ret - -1: movl %edi, %ecx - call __lll_mutex_lock_wait - jmp 2b - -3: movl %edi, %eax - call __lll_mutex_unlock_wake - jmp 4b - - .size __pthread_rwlock_unlock,.-__pthread_rwlock_unlock - - .globl pthread_rwlock_unlock -pthread_rwlock_unlock = __pthread_rwlock_unlock - - .globl __pthread_rwlock_unlock_internal -__pthread_rwlock_unlock_internal = __pthread_rwlock_unlock |