__vfork14.S revision 1.10 
11.10Smatt/*	$NetBSD: __vfork14.S,v 1.10 2013/09/03 00:30:19 matt Exp $	*/
21.1Sbjh21
31.1Sbjh21/*-
41.1Sbjh21 * Copyright (c) 1990 The Regents of the University of California.
51.1Sbjh21 * All rights reserved.
61.1Sbjh21 *
71.1Sbjh21 * Redistribution and use in source and binary forms, with or without
81.1Sbjh21 * modification, are permitted provided that the following conditions
91.1Sbjh21 * are met:
101.1Sbjh21 * 1. Redistributions of source code must retain the above copyright
111.1Sbjh21 *    notice, this list of conditions and the following disclaimer.
121.1Sbjh21 * 2. Redistributions in binary form must reproduce the above copyright
131.1Sbjh21 *    notice, this list of conditions and the following disclaimer in the
141.1Sbjh21 *    documentation and/or other materials provided with the distribution.
151.6Sagc * 3. Neither the name of the University nor the names of its contributors
161.1Sbjh21 *    may be used to endorse or promote products derived from this software
171.1Sbjh21 *    without specific prior written permission.
181.1Sbjh21 *
191.1Sbjh21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
201.1Sbjh21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
211.1Sbjh21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
221.1Sbjh21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
231.1Sbjh21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
241.1Sbjh21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
251.1Sbjh21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
261.1Sbjh21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
271.1Sbjh21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
281.1Sbjh21 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
291.1Sbjh21 * SUCH DAMAGE.
301.1Sbjh21 *
311.1Sbjh21 *	from: @(#)Ovfork.s	5.1 (Berkeley) 4/23/90
321.1Sbjh21 */
331.1Sbjh21
341.1Sbjh21#include "SYS.h"
351.1Sbjh21
361.1Sbjh21/*
371.1Sbjh21 * pid = vfork();
381.2Sbjh21 *
391.2Sbjh21 * On return from the SWI:
401.2Sbjh21 * r1 == 0 in parent process, r1 == 1 in child process.
411.2Sbjh21 * r0 == pid of child in parent, r0 == pid of parent in child.
421.1Sbjh21 */
431.1Sbjh21ENTRY(__vfork14)
441.9Smatt	mov	r2, lr
451.3Sbjh21	SYSTRAP(__vfork14)
461.9Smatt	_INVOKE_CERROR()
471.9Smatt	subs	r1, r1, #1	/* r1 == 0xffffffff if parent, 0 if child */
481.9Smatt	ands	r0, r0, r1	/* r0 == 0 if child, else unchanged */
491.9Smatt	RETr(r2)
501.9SmattEND(__vfork14)
51