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- /* Copyright (C) 1999, 2002, 2003, 2005 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Philip Blundell <philb@gnu.org>.
- 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-cancel.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 __NR_vfork
- #ifdef SHARED
- ldr ip, 1f
- ldr r0, 2f
- 3: add ip, pc, ip
- ldr r0, [ip, r0]
- #else
- ldr r0, 1f
- #endif
- movs r0, r0
- bne HIDDEN_JUMPTARGET (__fork)
- DO_CALL (vfork, 0)
- cmn a1, #4096
- RETINSTR(cc, lr)
- #ifndef __ASSUME_VFORK_SYSCALL
- /* Check if vfork syscall is known at all. */
- cmn a1, #ENOSYS
- bne PLTJMP(C_SYMBOL_NAME(__syscall_error))
- #endif
- #endif
- #ifndef __ASSUME_VFORK_SYSCALL
- /* If we don't have vfork, fork is close enough. */
- DO_CALL (fork, 0)
- cmn a1, #4096
- RETINSTR(cc, lr)
- #elif !defined __NR_vfork
- # error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined"
- #endif
- b PLTJMP(C_SYMBOL_NAME(__syscall_error))
- #ifdef SHARED
- 1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 8
- 2: .word __libc_pthread_functions(GOTOFF)
- #else
- .weak pthread_create
- 1: .word pthread_create
- #endif
- PSEUDO_END (__vfork)
- libc_hidden_def (__vfork)
- weak_alias (__vfork, vfork)
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