| /* Copyright (C) 2004-2018 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 <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 (__libc_vfork) |
| |
| mov.w .L1, r3 |
| trapa #0x10 |
| mov r0, r1 |
| |
| mov #-12, r2 |
| shad r2, r1 |
| not r1, r1 // r1=0 means r0 = -1 to -4095 |
| tst r1, r1 // i.e. error in linux |
| bf .Lpseudo_end |
| SYSCALL_ERROR_HANDLER |
| .Lpseudo_end: |
| rts |
| nop |
| .L1: |
| .word __NR_vfork |
| .align 2 |
| PSEUDO_END (__libc_vfork) |
| |
| #if IS_IN (libc) |
| weak_alias (__libc_vfork, vfork) |
| strong_alias (__libc_vfork, __vfork) |
| libc_hidden_def (__vfork) |
| #endif |
