projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 36960f0c | 1 | /* vfork for Linux, RISC-V version. |
| 04277e02 | 2 | Copyright (C) 2005-2019 Free Software Foundation, Inc. |
| 36960f0c PD |
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 | |
| 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 | |
| 16 | License along with the GNU C Library. If not, see | |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| 36960f0c PD |
18 | |
| 19 | /* vfork() is just a special case of clone(). */ | |
| 20 | ||
| 21 | #include <sys/asm.h> | |
| 22 | #include <sysdep.h> | |
| 23 | #define __ASSEMBLY__ | |
| 36960f0c PD |
24 | #include <asm/signal.h> |
| 25 | ||
| 8cacbcf4 JM |
26 | #define CLONE_VM 0x00000100 /* Set if VM shared between processes. */ |
| 27 | #define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to | |
| 28 | wake it up on mm_release. */ | |
| 29 | ||
| 36960f0c PD |
30 | .text |
| 31 | LEAF (__libc_vfork) | |
| 32 | ||
| 33 | li a0, (CLONE_VFORK | CLONE_VM | SIGCHLD) | |
| 34 | mv a1, sp | |
| 35 | ||
| 36 | li a7, __NR_clone | |
| 37 | scall | |
| 38 | ||
| 39 | bltz a0, 1f | |
| 40 | ret | |
| 41 | ||
| 42 | 1: j __syscall_error | |
| 43 | END (__libc_vfork) | |
| 44 | ||
| 45 | weak_alias (__libc_vfork, vfork) | |
| 46 | strong_alias (__libc_vfork, __vfork) | |
| 47 | libc_hidden_def (__vfork) |