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authorAndreas Schwab <schwab@suse.de>2003-01-10 14:05:26 +0000
committerAndreas Schwab <schwab@suse.de>2003-01-10 14:05:26 +0000
commitb2222ac61c7bfa221fc9ca88a48940af75016ed2 (patch)
treeac5cda2085d1a5d68f78ad832f020c429f9ebc67 /sysdeps/unix
parent29d9a17dba956f7d14eb0dd15f71751fd6da02ce (diff)
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Optimize for kernels which are known to have the vfork syscall.
Diffstat (limited to 'sysdeps/unix')
-rw-r--r--sysdeps/unix/sysv/linux/m68k/vfork.S11
1 files changed, 10 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/m68k/vfork.S b/sysdeps/unix/sysv/linux/m68k/vfork.S
index ed5e1e81d5..8027b2f801 100644
--- a/sysdeps/unix/sysv/linux/m68k/vfork.S
+++ b/sysdeps/unix/sysv/linux/m68k/vfork.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Schwab <schwab@gnu.org>.
@@ -20,6 +20,7 @@
#include <sysdep.h>
#define _ERRNO_H 1
#include <bits/errno.h>
+#include <kernel-features.h>
/* Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
@@ -46,13 +47,20 @@ ENTRY (__vfork)
/* Push back the return PC. */
movel %a0,%sp@-
+# ifdef __ASSUME_VFORK_SYSCALL
+# ifndef PIC
+ jbra SYSCALL_ERROR_LABEL
+# endif
+# else
/* Check if vfork syscall is known at all. */
movel #-ENOSYS,%d1
cmpl %d0,%d1
jne SYSCALL_ERROR_LABEL
+# endif
#endif
+#ifndef __ASSUME_VFORK_SYSCALL
/* If we don't have vfork, fork is close enough. */
movel #SYS_ify (fork), %d0
@@ -60,6 +68,7 @@ ENTRY (__vfork)
tstl %d0
jmi SYSCALL_ERROR_LABEL
rts
+#endif
PSEUDO_END (__vfork)
libc_hidden_def (__vfork)