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1/* Copyright (C) 1999-2019 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 <http://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

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