193 lines
3.9 KiB
ArmAsm
193 lines
3.9 KiB
ArmAsm
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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#include <shlib-compat.h>
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#include <pthread-errnos.h>
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#ifndef UP
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# define LOCK lock
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#else
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# define
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#endif
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#define SYS_gettimeofday __NR_gettimeofday
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#define SYS_futex 240
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#define FUTEX_WAKE 1
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.text
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.globl sem_timedwait
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.type sem_timedwait,@function
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.align 16
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cfi_startproc
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sem_timedwait:
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/* First check for cancellation. */
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movl %gs:CANCELHANDLING, %eax
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andl $0xfffffff9, %eax
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cmpl $8, %eax
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je 10f
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movl 4(%esp), %ecx
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movl (%ecx), %eax
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2: testl %eax, %eax
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je,pn 1f
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leal -1(%eax), %edx
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LOCK
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cmpxchgl %edx, (%ecx)
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jne,pn 2b
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xorl %eax, %eax
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ret
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/* Check whether the timeout value is valid. */
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1: pushl %esi
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cfi_adjust_cfa_offset(4)
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pushl %edi
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cfi_adjust_cfa_offset(4)
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pushl %ebx
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cfi_adjust_cfa_offset(4)
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subl $12, %esp
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cfi_adjust_cfa_offset(12)
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movl 32(%esp), %edi
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cfi_offset(7, -12) /* %edi */
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/* Check for invalid nanosecond field. */
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cmpl $1000000000, 4(%edi)
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movl $EINVAL, %esi
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cfi_offset(6, -8) /* %esi */
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jae 6f
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cfi_offset(3, -16) /* %ebx */
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7: call __pthread_enable_asynccancel
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movl %eax, 8(%esp)
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xorl %ecx, %ecx
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movl %esp, %ebx
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movl %ecx, %edx
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movl $SYS_gettimeofday, %eax
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ENTER_KERNEL
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/* Compute relative timeout. */
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movl 4(%esp), %eax
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movl $1000, %edx
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mul %edx /* Milli seconds to nano seconds. */
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movl (%edi), %ecx
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movl 4(%edi), %edx
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subl (%esp), %ecx
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subl %eax, %edx
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jns 5f
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addl $1000000000, %edx
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subl $1, %ecx
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5: testl %ecx, %ecx
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movl $ETIMEDOUT, %esi
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js 6f /* Time is already up. */
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movl %ecx, (%esp) /* Store relative timeout. */
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movl %edx, 4(%esp)
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movl 28(%esp), %ebx
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xorl %ecx, %ecx
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movl %esp, %esi
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movl $SYS_futex, %eax
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xorl %edx, %edx
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ENTER_KERNEL
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movl %eax, %esi
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movl 8(%esp), %eax
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call __pthread_disable_asynccancel
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testl %esi, %esi
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je,pt 9f
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cmpl $-EWOULDBLOCK, %esi
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jne 3f
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9: movl (%ebx), %eax
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8: testl %eax, %eax
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je 7b
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leal -1(%eax), %ecx
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LOCK
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cmpxchgl %ecx, (%ebx)
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jne,pn 8b
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addl $12, %esp
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cfi_adjust_cfa_offset(-12)
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xorl %eax, %eax
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popl %ebx
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cfi_adjust_cfa_offset(-4)
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cfi_restore(3)
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popl %edi
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cfi_adjust_cfa_offset(-4)
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cfi_restore(7)
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popl %esi
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cfi_adjust_cfa_offset(-4)
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cfi_restore(6)
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cfi_adjust_cfa_offset(-4)
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cfi_restore(6)
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ret
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cfi_adjust_cfa_offset(24)
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cfi_offset(6, -8) /* %esi */
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cfi_offset(7, -12) /* %edi */
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cfi_offset(3, -16) /* %ebx */
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3: negl %esi
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6:
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#ifdef PIC
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call __i686.get_pc_thunk.bx
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#else
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movl $4f, %ebx
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4:
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#endif
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addl $_GLOBAL_OFFSET_TABLE_, %ebx
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#if USE___THREAD
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movl %gs:0, %edx
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subl errno@gottpoff(%ebx), %edx
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movl %esi, (%edx)
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#else
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call __errno_location@plt
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movl %esi, (%eax)
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#endif
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addl $12, %esp
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cfi_adjust_cfa_offset(-12)
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orl $-1, %eax
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popl %ebx
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cfi_adjust_cfa_offset(-4)
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cfi_restore(3)
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popl %edi
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cfi_adjust_cfa_offset(-4)
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cfi_restore(7)
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popl %esi
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cfi_adjust_cfa_offset(-4)
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cfi_restore(6)
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ret
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10: /* Canceled. */
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movl $0xffffffff, %gs:RESULT
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LOCK
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orl $0x10, %gs:CANCELHANDLING
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movl %gs:CLEANUP_JMP_BUF, %eax
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jmp HIDDEN_JUMPTARGET (__pthread_unwind)
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cfi_endproc
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.size sem_timedwait,.-sem_timedwait
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