diff options
author | Austin Foxley <austinf@cetoncorp.com> | 2009-10-17 12:26:24 -0700 |
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committer | Austin Foxley <austinf@cetoncorp.com> | 2009-10-17 12:26:24 -0700 |
commit | c68d0fa2d88fc2134a38d99e7e944828384a7671 (patch) | |
tree | 6596943bd1c77f18d6e49d4153ddd3f3d67b49f5 /libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S | |
parent | 9a03e98a3b418f33c347a6023e9320f3a42cb9e4 (diff) |
libpthread/nptl: core of the "Native Posix Threading Library" for uClibc
targetting arm,sh,i386,mips,sparc for now
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S')
-rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S new file mode 100644 index 000000000..7f608a597 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S @@ -0,0 +1,66 @@ +/* Copyright (C) 2002, 2003, 2005 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <shlib-compat.h> +#include <pthread-errnos.h> + +#ifndef UP +# define LOCK lock +#else +# define +#endif + +#define SYS_futex 202 +#define FUTEX_WAKE 1 + + + .text + + .globl sem_post + .type sem_post,@function + .align 16 +sem_post: + movl $1, %edx + LOCK + xaddl %edx, (%rdi) + + movl $SYS_futex, %eax + movl $FUTEX_WAKE, %esi + incl %edx + syscall + + testq %rax, %rax + js 1f + + xorl %eax, %eax + retq + +1: +#if USE___THREAD + movq errno@gottpoff(%rip), %rdx + movl $EINVAL, %fs:(%rdx) +#else + callq __errno_location@plt + movl $EINVAL, (%rax) +#endif + + orl $-1, %eax + retq + .size sem_post,.-sem_post |