mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 10:50:07 +00:00
151 lines
2.9 KiB
ArmAsm
151 lines
2.9 KiB
ArmAsm
/* Copyright (C) 2002-2014 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <shlib-compat.h>
|
|
#include <pthread-errnos.h>
|
|
#include <structsem.h>
|
|
#include <lowlevellock.h>
|
|
|
|
|
|
.text
|
|
|
|
.globl __new_sem_post
|
|
.type __new_sem_post,@function
|
|
.align 16
|
|
__new_sem_post:
|
|
cfi_startproc
|
|
pushl %ebx
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_offset(%ebx, -8)
|
|
|
|
movl 8(%esp), %ebx
|
|
|
|
#if VALUE == 0
|
|
movl (%ebx), %eax
|
|
#else
|
|
movl VALUE(%ebx), %eax
|
|
#endif
|
|
0: cmpl $SEM_VALUE_MAX, %eax
|
|
je 3f
|
|
leal 1(%eax), %edx
|
|
LOCK
|
|
#if VALUE == 0
|
|
cmpxchgl %edx, (%ebx)
|
|
#else
|
|
cmpxchgl %edx, VALUE(%ebx)
|
|
#endif
|
|
jnz 0b
|
|
|
|
cmpl $0, NWAITERS(%ebx)
|
|
je 2f
|
|
|
|
movl $FUTEX_WAKE, %ecx
|
|
orl PRIVATE(%ebx), %ecx
|
|
movl $1, %edx
|
|
movl $SYS_futex, %eax
|
|
ENTER_KERNEL
|
|
|
|
testl %eax, %eax
|
|
js 1f
|
|
|
|
2: xorl %eax, %eax
|
|
popl %ebx
|
|
cfi_adjust_cfa_offset(-4)
|
|
cfi_restore(%ebx)
|
|
ret
|
|
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_offset(%ebx, -8)
|
|
1:
|
|
#ifdef PIC
|
|
SETUP_PIC_REG(bx)
|
|
#else
|
|
movl $4f, %ebx
|
|
4:
|
|
#endif
|
|
addl $_GLOBAL_OFFSET_TABLE_, %ebx
|
|
#ifdef NO_TLS_DIRECT_SEG_REFS
|
|
movl errno@gotntpoff(%ebx), %edx
|
|
addl %gs:0, %edx
|
|
movl $EINVAL, (%edx)
|
|
#else
|
|
movl errno@gotntpoff(%ebx), %edx
|
|
movl $EINVAL, %gs:(%edx)
|
|
#endif
|
|
|
|
orl $-1, %eax
|
|
popl %ebx
|
|
ret
|
|
|
|
3:
|
|
#ifdef PIC
|
|
SETUP_PIC_REG(bx)
|
|
#else
|
|
movl $5f, %ebx
|
|
5:
|
|
#endif
|
|
addl $_GLOBAL_OFFSET_TABLE_, %ebx
|
|
#ifdef NO_TLS_DIRECT_SEG_REFS
|
|
movl errno@gotntpoff(%ebx), %edx
|
|
addl %gs:0, %edx
|
|
movl $EOVERFLOW, (%edx)
|
|
#else
|
|
movl errno@gotntpoff(%ebx), %edx
|
|
movl $EOVERFLOW, %gs:(%edx)
|
|
#endif
|
|
|
|
orl $-1, %eax
|
|
popl %ebx
|
|
cfi_adjust_cfa_offset(-4)
|
|
cfi_restore(%ebx)
|
|
ret
|
|
cfi_endproc
|
|
.size __new_sem_post,.-__new_sem_post
|
|
versioned_symbol(libpthread, __new_sem_post, sem_post, GLIBC_2_1)
|
|
#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
|
|
.global __old_sem_post
|
|
.type __old_sem_post,@function
|
|
__old_sem_post:
|
|
cfi_startproc
|
|
pushl %ebx
|
|
cfi_adjust_cfa_offset(4)
|
|
cfi_offset(%ebx, -8)
|
|
|
|
movl 8(%esp), %ebx
|
|
LOCK
|
|
addl $1, (%ebx)
|
|
|
|
movl $SYS_futex, %eax
|
|
movl $FUTEX_WAKE, %ecx
|
|
movl $1, %edx
|
|
ENTER_KERNEL
|
|
|
|
testl %eax, %eax
|
|
js 1b
|
|
|
|
xorl %eax, %eax
|
|
popl %ebx
|
|
cfi_adjust_cfa_offset(-4)
|
|
cfi_restore(%ebx)
|
|
ret
|
|
cfi_endproc
|
|
.size __old_sem_post,.-__old_sem_post
|
|
compat_symbol(libpthread, __old_sem_post, sem_post, GLIBC_2_0)
|
|
#endif
|