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authorUlrich Drepper <drepper@redhat.com>2003-09-17 18:23:49 +0000
committerUlrich Drepper <drepper@redhat.com>2003-09-17 18:23:49 +0000
commit06f6ca9019897f5d1799c0ae8d7293ed249c0f97 (patch)
tree9a04e5058de47ce0898cf279205c8e58735efb96 /linuxthreads/sysdeps/unix
parent65af7e61427ce9bbbc0e43b2ad44e5b4678a37fc (diff)
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Update.
2003-09-17 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/arm/vfork.S: Branch to fork if libpthread is loaded. Elide backwards compatibility code when not required.
Diffstat (limited to 'linuxthreads/sysdeps/unix')
-rw-r--r--linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S39
1 files changed, 31 insertions, 8 deletions
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S b/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S
index 8d3338afd0..23687342d1 100644
--- a/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S
+++ b/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S
@@ -20,37 +20,60 @@
#include <sysdep-cancel.h>
#define _ERRNO_H 1
#include <bits/errno.h>
+#include <kernel-features.h>
-/* Clone the calling process, but without copying the whole address
-pace.
+/* Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
- replaced by a call to `execve'. Return -1 for errors, 0 to the new
-rocess,
+ replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
and the process ID of the new process to the old process. */
PSEUDO_PROLOGUE
ENTRY (__vfork)
- SINGLE_THREAD_P
- bne HIDDEN_JUMPTARGET (__fork)
#ifdef __NR_vfork
+
+#ifdef SHARED
+ ldr ip, 1f
+ ldr r0, 2f
+3: add ip, pc, ip
+ ldr r0, [ip, r0]
+#else
+ ldr r0, 1f
+#endif
+ movs r0, r0
+ bne HIDDEN_JUMPTARGET (__fork)
+
swi __NR_vfork
cmn a1, #4096
RETINSTR(movcc, pc, lr)
+#ifndef __ASSUME_VFORK_SYSCALL
/* Check if vfork syscall is known at all. */
- ldr a2, =-ENOSYS
- teq a1, a2
+ cmn a1, #ENOSYS
bne PLTJMP(C_SYMBOL_NAME(__syscall_error))
#endif
+#endif
+
+#ifndef __ASSUME_VFORK_SYSCALL
/* If we don't have vfork, fork is close enough. */
swi __NR_fork
cmn a1, #4096
RETINSTR(movcc, pc, lr)
+#elif !defined __NR_vfork
+# error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined"
+#endif
b PLTJMP(C_SYMBOL_NAME(__syscall_error))
+#ifdef SHARED
+1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 8
+2: .word __libc_pthread_functions(GOTOFF)
+#else
+ .weak pthread_create
+1: .word pthread_create
+#endif
+
PSEUDO_END (__vfork)
libc_hidden_def (__vfork)