minix/lib/nbsd_libc/arch/powerpc64/sys/__clone.S

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/* $NetBSD: __clone.S,v 1.1 2006/07/01 16:37:20 ross Exp $ */
/*-
* Copyright (c) 2001 Tsubai Masanari. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/errno.h>
#include "SYS.h"
#ifdef WEAK_ALIAS
WEAK_ALIAS(clone, __clone)
#endif
/*
* int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
*/
ENTRY(__clone)
/*
* Sanity checks: func and stack may not be NULL.
*/
cmpdi %r3,0
beq 1f
cmpdi %r4,0
beq 1f
mr %r7,%r3 /* Save fn in r7. */
mr %r3,%r5
li %r0,SYS___clone /* (flags, stack) */
sc
bso 2f /* error... */
cmpdi %r3,0
bnelr /* We're the parent, just return. */
mtlr %r7 /* fn */
mr %r3,%r6 /* arg */
blrl /* Call the clone's entry point. */
bl PIC_PLT(_C_LABEL(_exit))
1:
li %r3,EINVAL
2:
b PIC_PLT(_C_LABEL(__cerror))