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 | |
28 | ENTRY (__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 | |
38 | PSEUDO_END (__vfork) |
39 | libc_hidden_def (__vfork) |
40 | |
41 | weak_alias (__vfork, vfork) |
42 | strong_alias (__vfork, __libc_vfork) |
43 | |