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[uclinux-h8/uClibc.git] / libpthread / nptl / sysdeps / unix / sysv / linux / i386 / i486 / pthread_rwlock_unlock.S

diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S
index 597c82f..ec33147 100644 (file)
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.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.
 
@@ -13,32 +13,30 @@
    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.  */
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
 
 #include <sysdep.h>
+#include <lowlevellock.h>
 #include <lowlevelrwlock.h>
-
-
-#define FUTEX_WAIT             0
-#define FUTEX_WAKE             1
-
-#ifndef UP
-# define LOCK lock
-#else
-# define LOCK
-#endif
+#include <bits/kernel-features.h>
+#include <tls.h>
 
 
        .text
 
        .globl  __pthread_rwlock_unlock
        .type   __pthread_rwlock_unlock,@function
+       .protected      __pthread_rwlock_unlock
        .align  16
 __pthread_rwlock_unlock:
+       cfi_startproc
        pushl   %ebx
+       cfi_adjust_cfa_offset(4)
        pushl   %edi
+       cfi_adjust_cfa_offset(4)
+       cfi_offset(%ebx, -8)
+       cfi_offset(%edi, -12)
 
        movl    12(%esp), %edi
 
@@ -60,9 +58,8 @@ __pthread_rwlock_unlock:
 
 5:     movl    $0, WRITER(%edi)
 
-       movl    $1, %ecx
+       movl    $1, %edx
        leal    WRITERS_WAKEUP(%edi), %ebx
-       movl    %ecx, %edx
        cmpl    $0, WRITERS_QUEUED(%edi)
        jne     0f
 
@@ -82,14 +79,30 @@ __pthread_rwlock_unlock:
 #endif
        jne     7f
 
-8:     movl    $SYS_futex, %eax
+8:
+#ifdef __ASSUME_PRIVATE_FUTEX
+       movzbl  PSHARED(%edi), %ecx
+       xorl    $FUTEX_PRIVATE_FLAG|FUTEX_WAKE, %ecx
+#else
+       movzbl  PSHARED(%edi), %ecx
+       orl     $FUTEX_WAKE, %ecx
+       xorl    %gs:PRIVATE_FUTEX, %ecx
+#endif
+       movl    $SYS_futex, %eax
        ENTER_KERNEL
 
        xorl    %eax, %eax
        popl    %edi
+       cfi_adjust_cfa_offset(-4)
+       cfi_restore(%edi)
        popl    %ebx
+       cfi_adjust_cfa_offset(-4)
+       cfi_restore(%ebx)
        ret
 
+       cfi_adjust_cfa_offset(8)
+       cfi_offset(%ebx, -8)
+       cfi_offset(%edi, -12)
        .align  16
 6:     LOCK
 #if MUTEX == 0
@@ -106,31 +119,34 @@ __pthread_rwlock_unlock:
 
 1:
 #if MUTEX == 0
-       movl    %edi, %ecx
+       movl    %edi, %edx
 #else
-       leal    MUTEX(%edx), %ecx
+       leal    MUTEX(%edi), %edx
 #endif
-       call    __lll_mutex_lock_wait
+       movzbl  PSHARED(%edi), %ecx
+       call    __lll_lock_wait
        jmp     2b
 
 3:
 #if MUTEX == 0
        movl    %edi, %eax
 #else
-       leal    MUTEX(%edx), %eax
+       leal    MUTEX(%edi), %eax
 #endif
-       call    __lll_mutex_unlock_wake
+       movzbl  PSHARED(%edi), %ecx
+       call    __lll_unlock_wake
        jmp     4b
 
 7:
 #if MUTEX == 0
        movl    %edi, %eax
 #else
-       leal    MUTEX(%edx), %eax
+       leal    MUTEX(%edi), %eax
 #endif
-       call    __lll_mutex_unlock_wake
+       movzbl  PSHARED(%edi), %ecx
+       call    __lll_unlock_wake
        jmp     8b
-
+       cfi_endproc
        .size   __pthread_rwlock_unlock,.-__pthread_rwlock_unlock
 
        .globl  pthread_rwlock_unlock