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1 | /* Copyright (C) 2003 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, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
18 | ||
19 | #include <sysdep.h> | |
20 | #define _ERRNO_H 1 | |
21 | #include <bits/errno.h> | |
22 | #include <kernel-features.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 (__vfork) | |
30 | ||
31 | #ifdef __NR_vfork | |
32 | ||
33 | DO_CALL (SYS_ify (vfork)) | |
34 | ||
35 | # ifdef __ASSUME_VFORK_SYSCALL | |
36 | PSEUDO_RET | |
37 | # else | |
38 | bnslr+ | |
39 | /* Check if vfork syscall is known at all. */ | |
40 | cmpwi r3,ENOSYS | |
05856976 | 41 | bne- .Lsyscall_error |
b398ae3c UD |
42 | |
43 | # endif | |
44 | #endif | |
45 | ||
46 | #ifndef __ASSUME_VFORK_SYSCALL | |
47 | /* If we don't have vfork, fork is close enough. */ | |
48 | ||
49 | DO_CALL (SYS_ify (fork)) | |
05856976 UD |
50 | bnslr+ |
51 | ||
52 | .Lsyscall_error: | |
b0e196a4 | 53 | b __syscall_error@local |
b398ae3c UD |
54 | #endif |
55 | ||
56 | PSEUDO_END (__vfork) | |
57 | libc_hidden_def (__vfork) | |
58 | ||
59 | weak_alias (__vfork, vfork) |