1 | /* Copyright (C) 2004-2024 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 | |
29 | ENTRY (__libc_vfork) |
30 | /* Do vfork system call. */ |
31 | lghi %r1,SYS_ify (vfork) |
32 | svc 0 |
33 | |
34 | /* Check for error. */ |
35 | lghi %r4,-4095 |
36 | clgr %r2,%r4 |
37 | jgnl SYSCALL_ERROR_LABEL |
38 | |
39 | /* Normal return. */ |
40 | br %r14 |
41 | PSEUDO_END (__libc_vfork) |
42 | |
43 | #if IS_IN (libc) |
44 | weak_alias (__libc_vfork, vfork) |
45 | strong_alias (__libc_vfork, __vfork) |
46 | libc_hidden_def (__vfork) |
47 | #endif |
48 | |