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| author | Andreas Schwab <schwab@suse.de> | 2003-01-10 14:05:26 +0000 |
|---|---|---|
| committer | Andreas Schwab <schwab@suse.de> | 2003-01-10 14:05:26 +0000 |
| commit | b2222ac61c7bfa221fc9ca88a48940af75016ed2 (patch) | |
| tree | ac5cda2085d1a5d68f78ad832f020c429f9ebc67 /sysdeps/unix | |
| parent | 29d9a17dba956f7d14eb0dd15f71751fd6da02ce (diff) | |
| download | glibc-b2222ac61c7bfa221fc9ca88a48940af75016ed2.zip glibc-b2222ac61c7bfa221fc9ca88a48940af75016ed2.tar.gz glibc-b2222ac61c7bfa221fc9ca88a48940af75016ed2.tar.bz2 | |
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.S | 11 |
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 ed5e1e8..8027b2f 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) |