projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2004-2015 Free Software Foundation, Inc. |
| d3a4a571 UD |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. | |
| 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 | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the 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 | |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| d3a4a571 UD |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | #define _ERRNO_H 1 | |
| 21 | #include <bits/errno.h> | |
| d3a4a571 UD |
22 | #include <bits/wordsize.h> |
| 23 | #include <tcb-offsets.h> | |
| 24 | ||
| 25 | /* Clone the calling process, but without copying the whole address space. | |
| 26 | The calling process is suspended until the new process exits or is | |
| 27 | replaced by a call to `execve'. Return -1 for errors, 0 to the new process, | |
| 28 | and the process ID of the new process to the old process. */ | |
| 29 | ||
| 39507e4a | 30 | ENTRY (__libc_vfork) |
| d3a4a571 UD |
31 | ear %r4,%a0 |
| 32 | lhi %r1,1 | |
| 33 | icm %r3,15,PID(%r4) | |
| 34 | sll %r1,31 | |
| 35 | je 1f | |
| 36 | lcr %r1,%r3 | |
| 37 | 1: st %r1,PID(%r4) | |
| 38 | ||
| 39 | /* Do vfork system call. */ | |
| 40 | svc SYS_ify (vfork) | |
| 41 | ||
| 42 | ltr %r2,%r2 | |
| 43 | je 1f | |
| 44 | st %r3,PID(%r4) | |
| 45 | 1: | |
| 46 | /* Check for error. */ | |
| 47 | lhi %r4,-4095 | |
| 48 | clr %r2,%r4 | |
| 49 | jnl SYSCALL_ERROR_LABEL | |
| 50 | ||
| 51 | /* Normal return. */ | |
| 52 | br %r14 | |
| 39507e4a RM |
53 | PSEUDO_END (__libc_vfork) |
| 54 | ||
| 4f41c682 | 55 | #if IS_IN (libc) |
| 39507e4a RM |
56 | weak_alias (__libc_vfork, vfork) |
| 57 | strong_alias (__libc_vfork, __vfork) | |
| 73b4ce64 | 58 | libc_hidden_def (__vfork) |
| 39507e4a | 59 | #endif |