| /* Copyright (C) 1999-2014 Free Software Foundation, Inc. |
| |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| #define _ERRNO_H 1 |
| #include <bits/errno.h> |
| #include <kernel-features.h> |
| |
| /* Clone the calling process, but without copying the whole address space. |
| The calling process is suspended until the new process exits or is |
| replaced by a call to `execve'. Return -1 for errors, 0 to the new process, |
| and the process ID of the new process to the old process. */ |
| |
| ENTRY (__vfork) |
| |
| #ifdef SAVE_PID |
| SAVE_PID |
| #endif |
| mov x0, #0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ |
| mov x1, sp |
| DO_CALL (clone, 2) |
| #ifdef RESTORE_PID |
| RESTORE_PID |
| #endif |
| cmn x0, #4095 |
| b.cs 1f |
| RET |
| 1: |
| b SYSCALL_ERROR |
| |
| PSEUDO_END (__vfork) |
| libc_hidden_def (__vfork) |
| |
| weak_alias (__vfork, vfork) |
