1/* Copyright (C) 1999-2017 Free Software Foundation, Inc.
2
3   The GNU C Library is free software; you can redistribute it and/or
4   modify it under the terms of the GNU Lesser General Public License as
5   published by the Free Software Foundation; either version 2.1 of the
6   License, or (at your option) any later version.
7
8   The GNU C Library is distributed in the hope that it will be useful,
9   but WITHOUT ANY WARRANTY; without even the implied warranty of
10   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11   Lesser General Public License for more details.
12
13   You should have received a copy of the GNU Lesser General Public
14   License along with the GNU C Library; if not, see
15   <http://www.gnu.org/licenses/>.  */
16
17#include <sysdep.h>
18#define _ERRNO_H	1
19#include <bits/errno.h>
20
21/* Clone the calling process, but without copying the whole address space.
22   The calling process is suspended until the new process exits or is
23   replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
24   and the process ID of the new process to the old process.  */
25
26ENTRY (__vfork)
27
28	mov	x0, #0x4111	/* CLONE_VM | CLONE_VFORK | SIGCHLD */
29	mov	x1, sp
30	DO_CALL (clone, 2)
31
32	cmn	x0, #4095
33	b.cs    .Lsyscall_error
34	RET
35
36PSEUDO_END (__vfork)
37libc_hidden_def(vfork)
38
39weak_alias (__vfork, vfork)
40