From a032a6587011cbdac8c2f7e11f15dc4e592bbb55 Mon Sep 17 00:00:00 2001
From: Austin Foxley <austinf@cetoncorp.com>
Date: Tue, 16 Feb 2010 12:27:18 -0800
Subject: mass sync with glibc nptl

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
---
 .../sysv/linux/i386/i486/pthread_rwlock_rdlock.S   | 74 ++++++++++++++--------
 1 file changed, 46 insertions(+), 28 deletions(-)

(limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S')

diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S
index aec79f07e..d181393e6 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -18,19 +18,10 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <lowlevellock.h>
 #include <lowlevelrwlock.h>
 #include <pthread-errnos.h>
-#include <tcb-offsets.h>
-
-
-#define FUTEX_WAIT		0
-#define FUTEX_WAKE		1
-
-#ifndef UP
-# define LOCK lock
-#else
-# define LOCK
-#endif
+#include <bits/kernel-features.h>
 
 
 	.text
@@ -39,8 +30,13 @@
 	.type	__pthread_rwlock_rdlock,@function
 	.align	16
 __pthread_rwlock_rdlock:
+	cfi_startproc
 	pushl	%esi
+	cfi_adjust_cfa_offset(4)
 	pushl	%ebx
+	cfi_adjust_cfa_offset(4)
+	cfi_offset(%esi, -8)
+	cfi_offset(%ebx, -12)
 
 	xorl	%esi, %esi
 	movl	12(%esp), %ebx
@@ -61,7 +57,7 @@ __pthread_rwlock_rdlock:
 	jne	14f
 	cmpl	$0, WRITERS_QUEUED(%ebx)
 	je	5f
-	cmpl	$0, FLAGS(%ebx)
+	cmpb	$0, FLAGS(%ebx)
 	je	5f
 
 3:	addl	$1, READERS_QUEUED(%ebx)
@@ -77,8 +73,18 @@ __pthread_rwlock_rdlock:
 #endif
 	jne	10f
 
-11:	addl	$READERS_WAKEUP, %ebx
-	movl	%esi, %ecx	/* movl $FUTEX_WAIT, %ecx */
+11:
+#ifdef __ASSUME_PRIVATE_FUTEX
+	movzbl	PSHARED(%ebx), %ecx
+	xorl	$FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %ecx
+#else
+	movzbl	PSHARED(%ebx), %ecx
+# if FUTEX_WAIT != 0
+	orl	$FUTEX_WAIT, %ecx
+# endif
+	xorl	%gs:PRIVATE_FUTEX, %ecx
+#endif
+	addl	$READERS_WAKEUP, %ebx
 	movl	$SYS_futex, %eax
 	ENTER_KERNEL
 
@@ -98,7 +104,7 @@ __pthread_rwlock_rdlock:
 13:	subl	$1, READERS_QUEUED(%ebx)
 	jmp	2b
 
-5:	xorl	%ecx, %ecx
+5:	xorl	%edx, %edx
 	addl	$1, NR_READERS(%ebx)
 	je	8f
 9:	LOCK
@@ -110,24 +116,32 @@ __pthread_rwlock_rdlock:
 	jne	6f
 7:
 
-	movl	%ecx, %eax
+	movl	%edx, %eax
 	popl	%ebx
+	cfi_adjust_cfa_offset(-4)
+	cfi_restore(%ebx)
 	popl	%esi
+	cfi_adjust_cfa_offset(-4)
+	cfi_restore(%esi)
 	ret
 
+	cfi_adjust_cfa_offset(8)
+	cfi_offset(%esi, -8)
+	cfi_offset(%ebx, -12)
 1:
 #if MUTEX == 0
-	movl	%ebx, %ecx
+	movl	%ebx, %edx
 #else
-	leal	MUTEX(%ebx), %ecx
+	leal	MUTEX(%ebx), %edx
 #endif
-	call	__lll_mutex_lock_wait
+	movzbl	PSHARED(%ebx), %ecx
+	call	__lll_lock_wait
 	jmp	2b
 
 14:	cmpl	%gs:TID, %eax
 	jne	3b
 	/* Deadlock detected.  */
-	movl	$EDEADLK, %ecx
+	movl	$EDEADLK, %edx
 	jmp	9b
 
 6:
@@ -136,17 +150,18 @@ __pthread_rwlock_rdlock:
 #else
 	leal	MUTEX(%ebx), %eax
 #endif
-	call	__lll_mutex_unlock_wake
+	movzbl	PSHARED(%ebx), %ecx
+	call	__lll_unlock_wake
 	jmp	7b
 
 	/* Overflow.  */
 8:	subl	$1, NR_READERS(%ebx)
-	movl	$EAGAIN, %ecx
+	movl	$EAGAIN, %edx
 	jmp	9b
 
 	/* Overflow.  */
 4:	subl	$1, READERS_QUEUED(%ebx)
-	movl	$EAGAIN, %ecx
+	movl	$EAGAIN, %edx
 	jmp	9b
 
 10:
@@ -155,17 +170,20 @@ __pthread_rwlock_rdlock:
 #else
 	leal	MUTEX(%ebx), %eax
 #endif
-	call	__lll_mutex_unlock_wake
+	movzbl	PSHARED(%ebx), %ecx
+	call	__lll_unlock_wake
 	jmp	11b
 
 12:
 #if MUTEX == 0
-	movl	%ebx, %ecx
+	movl	%ebx, %edx
 #else
-	leal	MUTEX(%ebx), %ecx
+	leal	MUTEX(%ebx), %edx
 #endif
-	call	__lll_mutex_lock_wait
+	movzbl	PSHARED(%ebx), %ecx
+	call	__lll_lock_wait
 	jmp	13b
+	cfi_endproc
 	.size	__pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock
 
 	.globl	pthread_rwlock_rdlock
-- 
cgit v1.2.3