__clone.S revision 1.1 
11.1Stsubai/*	$NetBSD: __clone.S,v 1.1 2001/07/20 17:19:15 tsubai Exp $	*/
21.1Stsubai
31.1Stsubai/*-
41.1Stsubai * Copyright (c) 2001 Tsubai Masanari.  All rights reserved.
51.1Stsubai *
61.1Stsubai * Redistribution and use in source and binary forms, with or without
71.1Stsubai * modification, are permitted provided that the following conditions
81.1Stsubai * are met:
91.1Stsubai * 1. Redistributions of source code must retain the above copyright
101.1Stsubai *    notice, this list of conditions and the following disclaimer.
111.1Stsubai * 2. Redistributions in binary form must reproduce the above copyright
121.1Stsubai *    notice, this list of conditions and the following disclaimer in the
131.1Stsubai *    documentation and/or other materials provided with the distribution.
141.1Stsubai * 3. The name of the author may not be used to endorse or promote products
151.1Stsubai *    derived from this software without specific prior written permission.
161.1Stsubai *
171.1Stsubai * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
181.1Stsubai * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
191.1Stsubai * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
201.1Stsubai * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
211.1Stsubai * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
221.1Stsubai * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
231.1Stsubai * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
241.1Stsubai * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
251.1Stsubai * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
261.1Stsubai * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
271.1Stsubai */
281.1Stsubai
291.1Stsubai#include <sys/errno.h>
301.1Stsubai#include "SYS.h"
311.1Stsubai
321.1Stsubai#ifdef WEAK_ALIAS
331.1StsubaiWEAK_ALIAS(clone, __clone)
341.1Stsubai#endif
351.1Stsubai
361.1Stsubai/*
371.1Stsubai * int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
381.1Stsubai */
391.1StsubaiENTRY(__clone)
401.1Stsubai	/*
411.1Stsubai	 * Sanity checks: func and stack may not be NULL.
421.1Stsubai	 */
431.1Stsubai	cmpwi	3,0
441.1Stsubai	beq	1f
451.1Stsubai	cmpwi	4,0
461.1Stsubai	beq	1f
471.1Stsubai
481.1Stsubai	mr	7,3		/* Save fn in r7. */
491.1Stsubai	mr	3,5
501.1Stsubai	li	0,SYS___clone	/* (flags, stack) */
511.1Stsubai	sc
521.1Stsubai	bso	2f		/* error... */
531.1Stsubai
541.1Stsubai	cmpwi	3,0
551.1Stsubai	bnelr			/* We're the parent, just return. */
561.1Stsubai
571.1Stsubai	mtlr	7		/* fn */
581.1Stsubai	mr	3,6		/* arg */
591.1Stsubai	blrl			/* Call the clone's entry point. */
601.1Stsubai
611.1Stsubai	bl	PIC_PLT(_C_LABEL(_exit))
621.1Stsubai
631.1Stsubai1:
641.1Stsubai	li	3,EINVAL
651.1Stsubai2:
661.1Stsubai	b	PIC_PLT(_C_LABEL(__cerror))
67