1/* Copyright (C) 1999-2022 Free Software Foundation, Inc.
2
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public License as
7   published by the Free Software Foundation; either version 2.1 of the
8   License, or (at your option) any later version.
9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#include <sysdep.h>
20#define _ERRNO_H	1
21#include <bits/errno.h>
22
23/* Clone the calling process, but without copying the whole address space.
24   The calling process is suspended until the new process exits or is
25   replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
26   and the process ID of the new process to the old process.  */
27
28ENTRY (__vfork)
29
30	mov	x0, #0x4111	/* CLONE_VM | CLONE_VFORK | SIGCHLD */
31	mov	x1, sp
32	DO_CALL (clone, 2)
33
34	cmn	x0, #4095
35	b.cs    .Lsyscall_error
36	RET
37
38PSEUDO_END (__vfork)
39libc_hidden_def (__vfork)
40
41weak_alias (__vfork, vfork)
42strong_alias (__vfork, __libc_vfork)
43