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We need to use a syscall.

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Ulrich Drepper 1999-01-29 08:03:49 +00:00
parent 9953714a27
commit ac3b5c24b4
1 changed files with 0 additions and 46 deletions
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sysdeps/unix/sysv/linux/arm/vfork.S
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/* Copyright (C) 1999 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 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>
#define _SIGNAL_H
#include <bits/signum.h>
#define CLONE_VM 0x00000100 /* Set if VM shared between processes. */
#define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to
wake it up on mm_release. */
/* 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)
mov a1, $SIGCLD
orr a1, a1, $(CLONE_VM | CLONE_VFORK)
mov a2, $0
swi SYS_ify(clone)
cmn a1, $4096
bhs PLTJMP(C_SYMBOL_NAME(__syscall_error))
RETINSTR(mov, pc, lr)
PSEUDO_END (__vfork)
weak_alias (__vfork, vfork)