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/* Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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>
/* 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)
/* We have to use the clone() system call. The flags to use are
CLONE_VFORK | CLONE_VM
and we send SIGCHLD on termination (i.e., flags = 0x4111). */
popl %edx /* Pop return address. */
pushl %ebx
movl %esp, %ecx
movl $0x4111, %ebx
movl $SYS_ify(clone), %eax
int $0x80
popl %ebx
pushl %edx
cmpl $-4095, %eax
jae SYSCALL_ERROR_LABEL
L(pseudo_end):
ret
PSEUDO_END (__vfork)
weak_alias (__vfork, vfork)
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