db5f2fc93d
* sysdeps/unix/sysv/linux/x86_64/sem_post.S: New file. * sysdeps/unix/sysv/linux/x86_64/sem_trywait.S: New file. * sysdeps/unix/sysv/linux/x86_64/sem_wait.S: New file. * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S: New file. * sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Fix error value in unused code.
80 lines
1.8 KiB
ArmAsm
80 lines
1.8 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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#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 202
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#define EWOULDBLOCK 11
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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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3: movl (%rdi), %eax
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2: testl %eax, %eax
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je 1f
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leal -1(%eax), %edx
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LOCK
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cmpxchgl %edx, (%rdi)
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jne 2b
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xorl %eax, %eax
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retq
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1: xorq %r10, %r10
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movq $SYS_futex, %rax
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movq %r10, %rsi
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movq %r10, %rdx
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syscall
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testq %rax, %rax
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je 3b
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cmpq $-EWOULDBLOCK, %rax
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je 3b
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negq %rax
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#if USE___THREAD
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movq errno@gottpoff(%rip), %rdx
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movl %eax, %fs:(%rdx)
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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, (%rax)
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#endif
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orl $-1, %eax
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retq
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.size __new_sem_wait,.-__new_sem_wait
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.symver __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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.symver __old_sem_wait, sem_wait@GLIBC_2.0
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#endif
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