1/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library; if not, see
16   <https://www.gnu.org/licenses/>.  */
17
18#include <sysdep.h>
19#define _ERRNO_H	1
20#include <bits/errno.h>
21#include <bits/wordsize.h>
22#include <tcb-offsets.h>
23
24/* Clone the calling process, but without copying the whole address space.
25   The calling process is suspended until the new process exits or is
26   replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
27   and the process ID of the new process to the old process.  */
28
29ENTRY (__libc_vfork)
30	/* Do vfork system call.  */
31	svc	SYS_ify (vfork)
32
33	/* Check for error.  */
34	lghi	%r4,-4095
35	clgr	%r2,%r4
36	jgnl	SYSCALL_ERROR_LABEL
37
38	/* Normal return.  */
39	br	%r14
40PSEUDO_END (__libc_vfork)
41
42#if IS_IN (libc)
43weak_alias (__libc_vfork, vfork)
44strong_alias (__libc_vfork, __vfork)
45libc_hidden_def (__vfork)
46#endif
47