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/* $NetBSD: __clone.S,v 1.4 2011/01/25 02:38:15 matt Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas <matt@3am-software.com>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 SYSLIBC_SCCS
RCSID("$NetBSD: __clone.S,v 1.4 2011/01/25 02:38:15 matt Exp $")
#endif
#ifdef WEAK_ALIAS
WEAK_ALIAS(clone, __clone)
#endif
/*
* int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
*/
ENTRY(__clone, 0)
/*
* Sanity checks: func and stack may not be NULL.
*/
movl 4(%ap),%r2 /* check and save function */
beql 9f
tstl 8(%ap) /* check stack */
beql 9f
/*
* The system call expects (flags, stack).
*/
movl 12(%ap),4(%ap) /* XXX this doesn't work for
callg with a RO arglist */
movl $2,(%ap)
SYSTRAP(__clone) /* only %r0/%r1 munged */
blbc %r1,8f /* %r1<0>: 0=parent 1=child */
/* Call the clone's entry point. */
pushl 16(%ap)
calls $1,(%r2)
/* Pass return value to _exit(). */
pushl %r0
calls $1,_C_LABEL(_exit)
/* NOTREACHED */
8: ret
9: movl $EINVAL,%r0
jmp CERROR+2
END(__clone)
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