/* Copyright (C) 2004-2018 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.h>

#define _ERRNO_H	1

#include <bits/errno.h>

#include <tcb-offsets.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 (__libc_vfork)

	mov.w	.L1, r3

	trapa	#0x10

	mov     r0, r1

	mov	#-12, r2

	shad	r2, r1

	not	r1, r1			// r1=0 means r0 = -1 to -4095

	tst	r1, r1			// i.e. error in linux

	bf	.Lpseudo_end

	SYSCALL_ERROR_HANDLER

.Lpseudo_end:

	rts

	 nop

.L1:

	.word	__NR_vfork

	.align	2

PSEUDO_END (__libc_vfork)

#if IS_IN (libc)

weak_alias (__libc_vfork, vfork)

strong_alias (__libc_vfork, __vfork)

libc_hidden_def (__vfork)

#endif