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