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Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S')
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S68
1 files changed, 42 insertions, 26 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S
index de83dec1b..caebb935a 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_once.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -18,10 +18,10 @@
#include <unwindbuf.h>
#include <sysdep.h>
+#include <bits/kernel-features.h>
+#include <lowlevellock.h>
#include "lowlevel-atomic.h"
-#define FUTEX_WAIT 0
-#define FUTEX_WAKE 1
.comm __fork_generation, 4, 4
@@ -94,7 +94,19 @@ __pthread_once:
bf 3f /* Different for generation -> run initializer. */
/* Somebody else got here first. Wait. */
- mov #FUTEX_WAIT, r5
+#ifdef __ASSUME_PRIVATE_FUTEX
+ mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAIT), r5
+ extu.b r5, r5
+#else
+ stc gbr, r1
+ mov.w .Lpfoff, r2
+ add r2, r1
+ mov.l @r1, r5
+# if FUTEX_WAIT != 0
+ mov #FUTEX_WAIT, r0
+ or r0, r5
+# endif
+#endif
mov r3, r6
mov #0, r7
mov #SYS_futex, r3
@@ -156,7 +168,17 @@ __pthread_once:
INC (@r9, r2)
/* Wake up all other threads. */
mov r9, r4
- mov #FUTEX_WAKE, r5
+#ifdef __ASSUME_PRIVATE_FUTEX
+ mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAKE), r5
+ extu.b r5, r5
+#else
+ stc gbr, r1
+ mov.w .Lpfoff, r2
+ add r2, r1
+ mov.l @r1, r5
+ mov #FUTEX_WAKE, r0
+ or r0, r5
+#endif
mov #-1, r6
shlr r6 /* r6 = 0x7fffffff */
mov #0, r7
@@ -191,7 +213,17 @@ __pthread_once:
mov #0, r7
mov.l r7, @r9
mov r9, r4
- mov #FUTEX_WAKE, r5
+#ifdef __ASSUME_PRIVATE_FUTEX
+ mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAKE), r5
+#else
+ stc gbr, r1
+ mov.w .Lpfoff, r2
+ add r2, r1
+ mov.l @r1, r5
+ mov #FUTEX_WAKE, r0
+ or r0, r5
+#endif
+ extu.b r5, r5
mov #-1, r6
shlr r6 /* r6 = 0x7fffffff */
mov #SYS_futex, r3
@@ -207,6 +239,10 @@ __pthread_once:
sleep
cfi_endproc
+#ifndef __ASSUME_PRIVATE_FUTEX
+.Lpfoff:
+ .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE
+#endif
.align 2
.Lsigsetjmp:
.long __sigsetjmp@PLT-(.Lsigsetjmp0-.)
@@ -223,23 +259,3 @@ __pthread_once_internal = __pthread_once
.globl pthread_once
pthread_once = __pthread_once
-
-
- .type clear_once_control,@function
- .align 5
-clear_once_control:
- mov #0, r0
- mov.l r0, @r4
-
- mov #FUTEX_WAKE, r5
- mov #-1, r6
- shlr r6 /* r6 = 0x7fffffff */
- mov #0, r7
- mov #SYS_futex, r3
- extu.b r3, r3
- trapa #0x14
- SYSCALL_INST_PAD
-
- rts
- nop
- .size clear_once_control,.-clear_once_control