diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/i486/sem_trywait.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/i486/sem_trywait.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/i486/sem_trywait.S b/sysdeps/unix/sysv/linux/i386/i486/sem_trywait.S new file mode 100644 index 0000000000..69611eac5d --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/i486/sem_trywait.S @@ -0,0 +1,67 @@ +/* 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 <lowlevellock.h> + + .text + + .globl __new_sem_trywait + .type __new_sem_trywait,@function + .align 16 +__new_sem_trywait: + movl 4(%esp), %ecx + + movl (%ecx), %eax +2: testl %eax, %eax + jz 1f + + leal -1(%eax), %edx + LOCK + cmpxchgl %edx, (%ecx) + jne 2b + xorl %eax, %eax + ret + +1: +#ifdef PIC + SETUP_PIC_REG(cx) +#else + movl $3f, %ecx +3: +#endif + addl $_GLOBAL_OFFSET_TABLE_, %ecx +#ifdef NO_TLS_DIRECT_SEG_REFS + movl errno@gotntpoff(%ecx), %edx + addl %gs:0, %edx + movl $EAGAIN, (%edx) +#else + movl errno@gotntpoff(%ecx), %edx + movl $EAGAIN, %gs:(%edx) +#endif + orl $-1, %eax + ret + .size __new_sem_trywait,.-__new_sem_trywait + versioned_symbol(libpthread, __new_sem_trywait, sem_trywait, GLIBC_2_1) +#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) + .global __old_sem_trywait +__old_sem_trywait = __new_sem_trywait + compat_symbol(libpthread, __old_sem_trywait, sem_trywait, GLIBC_2_0) +#endif |