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      1  1.2  matt /*	$NetBSD: __clone.S,v 1.2 2014/08/23 02:24:22 matt Exp $	*/
      2  1.1  ross 
      3  1.1  ross /*-
      4  1.1  ross  * Copyright (c) 2001 Tsubai Masanari.  All rights reserved.
      5  1.1  ross  *
      6  1.1  ross  * Redistribution and use in source and binary forms, with or without
      7  1.1  ross  * modification, are permitted provided that the following conditions
      8  1.1  ross  * are met:
      9  1.1  ross  * 1. Redistributions of source code must retain the above copyright
     10  1.1  ross  *    notice, this list of conditions and the following disclaimer.
     11  1.1  ross  * 2. Redistributions in binary form must reproduce the above copyright
     12  1.1  ross  *    notice, this list of conditions and the following disclaimer in the
     13  1.1  ross  *    documentation and/or other materials provided with the distribution.
     14  1.1  ross  * 3. The name of the author may not be used to endorse or promote products
     15  1.1  ross  *    derived from this software without specific prior written permission.
     16  1.1  ross  *
     17  1.1  ross  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  1.1  ross  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  1.1  ross  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  1.1  ross  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  1.1  ross  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  1.1  ross  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  1.1  ross  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  1.1  ross  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  1.1  ross  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  1.1  ross  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  1.1  ross  */
     28  1.1  ross 
     29  1.1  ross #include <sys/errno.h>
     30  1.1  ross #include "SYS.h"
     31  1.1  ross 
     32  1.1  ross #ifdef WEAK_ALIAS
     33  1.1  ross WEAK_ALIAS(clone, __clone)
     34  1.1  ross #endif
     35  1.1  ross 
     36  1.1  ross /*
     37  1.1  ross  * int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
     38  1.1  ross  */
     39  1.1  ross ENTRY(__clone)
     40  1.1  ross 	/*
     41  1.1  ross 	 * Sanity checks: func and stack may not be NULL.
     42  1.1  ross 	 */
     43  1.2  matt 	cmpptri	%r3,0
     44  1.1  ross 	beq	1f
     45  1.2  matt 	cmpptri	%r4,0
     46  1.1  ross 	beq	1f
     47  1.1  ross 
     48  1.1  ross 	mr	%r7,%r3		/* Save fn in r7. */
     49  1.1  ross 	mr	%r3,%r5
     50  1.2  matt 	_DOSYSCALL(__clone)	/* (flags, stack) */
     51  1.1  ross 	bso	2f		/* error... */
     52  1.1  ross 
     53  1.2  matt 	cmpptri	%r3,0
     54  1.1  ross 	bnelr			/* We're the parent, just return. */
     55  1.1  ross 
     56  1.1  ross 	mtlr	%r7		/* fn */
     57  1.1  ross 	mr	%r3,%r6		/* arg */
     58  1.1  ross 	blrl			/* Call the clone's entry point. */
     59  1.1  ross 
     60  1.1  ross 	bl	PIC_PLT(_C_LABEL(_exit))
     61  1.2  matt 	nop
     62  1.1  ross 
     63  1.1  ross 1:
     64  1.1  ross 	li	%r3,EINVAL
     65  1.1  ross 2:
     66  1.2  matt 	BRANCH_TO_CERROR()
     67  1.2  matt END(__clone)
     68