| /* Copyright (C) 2003 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003. |
| |
| 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <sysdep.h> |
| #define _ERRNO_H 1 |
| #include <bits/errno.h> |
| #include <kernel-features.h> |
| #include <bits/wordsize.h> |
| #include <tcb-offsets.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) |
| ear %r4,%a0 |
| l %r3,PID(%r4) |
| lcr %r1,%r3 |
| st %r1,PID(%r4) |
| |
| /* Do vfork system call. */ |
| svc SYS_ify (vfork) |
| |
| ltr %r2,%r2 |
| je 1f |
| st %r3,PID(%r4) |
| 1: |
| /* Check for error. */ |
| lhi %r4,-4095 |
| clr %r2,%r4 |
| jnl SYSCALL_ERROR_LABEL |
| |
| /* Normal return. */ |
| br %r14 |
| PSEUDO_END(__vfork) |
| |
| weak_alias (__vfork, vfork) |
