/* Copyright (C) 2005-2018 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/>.  */

/* vfork() is just a special case of clone().  */

#include <sys/asm.h>

#include <sysdep.h>

#include <asm/unistd.h>

#include <sgidefs.h>

#include <tls.h>

/* int vfork() */

	.text

	.set		nomips16

LOCALSZ= 1

FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK

GPOFF= FRAMESZ-(1*SZREG)

NESTED(__libc_vfork,FRAMESZ,sp)

#ifdef __PIC__

	SETUP_GP

#endif

	PTR_SUBU sp, FRAMESZ

	cfi_adjust_cfa_offset (FRAMESZ)

	SETUP_GP64_REG (a5, __libc_vfork)

#ifdef __PIC__

	SAVE_GP (GPOFF)

#endif

#ifdef PROF

# if (_MIPS_SIM != _ABIO32)

	PTR_S		a5, GPOFF(sp)

# endif

	.set		noat

	move		$1, ra

# if (_MIPS_SIM == _ABIO32)

	subu		sp,sp,8

# endif

	jal		_mcount

	.set		at

# if (_MIPS_SIM != _ABIO32)

	PTR_L		a5, GPOFF(sp)

# endif

#endif

	PTR_ADDU	sp, FRAMESZ

	cfi_adjust_cfa_offset (-FRAMESZ)

	li		a0, 0x4112	/* CLONE_VM | CLONE_VFORK | SIGCHLD */

	move		a1, sp

	/* Do the system call */

	li		v0,__NR_clone

	syscall

	cfi_remember_state

	bnez		a3,L(error)

	/* Successful return from the parent or child.  */

	RESTORE_GP64_REG

	ret

	/* Something bad happened -- no child created.  */

L(error):

	cfi_restore_state

#ifdef __PIC__

	PTR_LA		t9, __syscall_error

	RESTORE_GP64_REG

	jr		t9

#else

	RESTORE_GP64_REG

	j		__syscall_error

#endif

	END(__libc_vfork)

#if IS_IN (libc)

weak_alias (__libc_vfork, vfork)

strong_alias (__libc_vfork, __vfork)

libc_hidden_def (__vfork)

#endif