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/* Copyright (C) 2004-2014 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/wordsize.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 (__libc_vfork)
ear %r4,%a0
sllg %r4,%r4,32
ear %r4,%a1
icm %r3,15,PID(%r4)
llilh %r1,32768
je 1f
lcr %r1,%r3
1: st %r1,PID(%r4)
/* Do vfork system call. */
svc SYS_ify (vfork)
ltgr %r2,%r2
je 1f
st %r3,PID(%r4)
1:
/* Check for error. */
lghi %r4,-4095
clgr %r2,%r4
jgnl SYSCALL_ERROR_LABEL
/* Normal return. */
br %r14
PSEUDO_END (__libc_vfork)
#if IS_IN (libc)
weak_alias (__libc_vfork, vfork)
strong_alias (__libc_vfork, __vfork)
libc_hidden_def (__vfork)
#endif
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