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/* Copyright (C) 1999, 2002, 2003 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. */
PSEUDO_PROLOGUE
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)
swi __NR_vfork
cmn a1, #4096
RETINSTR(movcc, pc, 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. */
swi __NR_fork
cmn a1, #4096
RETINSTR(movcc, pc, 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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