97 lines
2.1 KiB
ArmAsm
97 lines
2.1 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_futex 240
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#define FUTEX_WAKE 1
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.text
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.globl __new_sem_wait
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.type __new_sem_wait,@function
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.align 16
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__new_sem_wait:
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pushl %ebx
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pushl %esi
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movl 12(%esp), %ebx
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3: movl (%ebx), %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, (%ebx)
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jne,pn 2b
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xorl %eax, %eax
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popl %esi
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popl %ebx
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ret
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1: xorl %esi, %esi
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movl $SYS_futex, %eax
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movl %esi, %ecx
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movl %esi, %edx
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ENTER_KERNEL
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testl %eax, %eax
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je 3b
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cmpl $-EWOULDBLOCK, %eax
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je 3b
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negl %eax
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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 %eax, (%edx)
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#else
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movl %eax, %edx
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call __errno_location@plt
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movl %edx, (%eax)
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#endif
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orl $-1, %eax
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popl %esi
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popl %ebx
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ret
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.size __new_sem_wait,.-__new_sem_wait
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versioned_symbol(libpthread, __new_sem_wait, sem_wait, GLIBC_2_1)
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#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
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.global __old_sem_wait
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__old_sem_wait = __new_sem_wait
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compat_symbol(libpthread, __old_sem_wait, sem_wait, GLIBC_2_0)
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#endif
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