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/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#define _ERRNO_H 1
#include <bits/errno.h>
#include <bits/kernel-features.h>
#include <tcb-offsets.h>
/* 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 process,
and the process ID of the new process to the old process. */
ENTRY (__vfork)
lwz 0,PID(2)
cmpwi 0,0,0
neg 0,0
bne- 0,1f
lis 0,0x8000
1: stw 0,PID(2)
DO_CALL (SYS_ify (vfork))
cmpwi 1,3,0
beqlr- 1
lwz 0,PID(2)
/* Cannot use clrlwi. here, because cr0 needs to be preserved
until PSEUDO_RET. */
clrlwi 4,0,1
cmpwi 1,4,0
beq- 1,1f
neg 4,0
1: stw 4,PID(2)
PSEUDO_RET
PSEUDO_END (__vfork)
libc_hidden_def (__vfork)
weak_alias (__vfork, vfork)
libc_hidden_weak(vfork)
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