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2b778ceb | 1 | /* Copyright (C) 1999-2021 Free Software Foundation, Inc. |
554066b8 MS |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
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18 | |
19 | #include <sysdep.h> | |
20 | #define _ERRNO_H 1 | |
21 | #include <bits/errno.h> | |
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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 | ||
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30 | mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ |
31 | mov x1, sp | |
32 | DO_CALL (clone, 2) | |
89b4bd6b | 33 | |
554066b8 | 34 | cmn x0, #4095 |
89b4bd6b | 35 | b.cs .Lsyscall_error |
554066b8 | 36 | RET |
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37 | |
38 | PSEUDO_END (__vfork) | |
39 | libc_hidden_def (__vfork) | |
40 | ||
41 | weak_alias (__vfork, vfork) | |
89b4bd6b | 42 | strong_alias (__vfork, __libc_vfork) |