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- /* Copyright (C) 2003 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-cancel.h>
- #define _ERRNO_H 1
- #include <bits/errno.h>
- #include <bits/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. */
- #ifdef SHARED
- .section ".toc","aw"
- .LC0:
- .tc __libc_pthread_functions[TC],__libc_pthread_functions
- .section ".text"
- .align 2
- #endif
- ENTRY (__vfork)
- #ifdef __NR_vfork
- # ifdef SHARED
- ld 10,.LC0@toc(2)
- ld 10,0(10)
- cmpwi 10,0
- bne- HIDDEN_JUMPTARGET(fork)
- # else
- .weak pthread_create
- lis 10,pthread_create@highest
- ori 10,10,pthread_create@higher
- sldi 10,10,32
- oris 10,10,pthread_create@h
- ori 10,10,pthread_create@l
- cmpwi 10,0
- bne- .Lhidden_fork
- # endif
- DO_CALL (SYS_ify (vfork));
- # ifdef __ASSUME_VFORK_SYSCALL
- PSEUDO_RET
- # else
- bnslr+
- /* Check if vfork syscall is known at all. */
- cmpdi r3,ENOSYS
- # ifdef SHARED
- bne JUMPTARGET(__syscall_error)
- # else
- bne- .Lsyscall_error
- # endif
- # endif
- #endif
- #ifndef __ASSUME_VFORK_SYSCALL
- /* If we don't have vfork, fork is close enough. */
- DO_CALL (SYS_ify (fork));
- PSEUDO_RET
- #endif
- # ifndef SHARED
- .Lhidden_fork:
- b HIDDEN_JUMPTARGET(fork)
- .Lsyscall_error:
- b JUMPTARGET(__syscall_error)
- # endif
- PSEUDO_END (__vfork)
- libc_hidden_def (__vfork)
- weak_alias (__vfork, vfork)
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