sparc/sys/fork.S

     1.2  christos /*	$NetBSD: fork.S,v 1.2.12.1 2000/08/22 07:24:00 kleink Exp $	*/
     1.2  christos
     1.1       cgd /*
     1.1       cgd  * Copyright (c) 1992, 1993
     1.1       cgd  *	The Regents of the University of California.  All rights reserved.
     1.1       cgd  *
     1.1       cgd  * This software was developed by the Computer Systems Engineering group
     1.1       cgd  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
     1.1       cgd  * contributed to Berkeley.
     1.1       cgd  *
     1.1       cgd  * Redistribution and use in source and binary forms, with or without
     1.1       cgd  * modification, are permitted provided that the following conditions
     1.1       cgd  * are met:
     1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     1.1       cgd  *    documentation and/or other materials provided with the distribution.
     1.1       cgd  * 3. All advertising materials mentioning features or use of this software
     1.1       cgd  *    must display the following acknowledgement:
     1.1       cgd  *	This product includes software developed by the University of
     1.1       cgd  *	California, Berkeley and its contributors.
     1.1       cgd  * 4. Neither the name of the University nor the names of its contributors
     1.1       cgd  *    may be used to endorse or promote products derived from this software
     1.1       cgd  *    without specific prior written permission.
     1.1       cgd  *
     1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     1.1       cgd  * SUCH DAMAGE.
     1.1       cgd  *
     1.1       cgd  * from: Header: fork.s,v 1.1 91/07/06 13:05:58 torek Exp
     1.1       cgd  */
     1.1       cgd
     1.2  christos #include <machine/asm.h>
     1.2  christos #if defined(SYSLIBC_SCCS) && !defined(lint)
     1.2  christos #if 0
     1.1       cgd 	.asciz "@(#)fork.s	8.1 (Berkeley) 6/4/93"
     1.2  christos #else
     1.2  christos 	RCSID("$NetBSD: fork.S,v 1.2.12.1 2000/08/22 07:24:00 kleink Exp $")
     1.2  christos #endif
     1.2  christos #endif /* SYSLIBC_SCCS and not lint */
     1.1       cgd
     1.1       cgd #include "SYS.h"
     1.1       cgd
1.2.12.1    kleink #ifdef WEAK_ALIAS
1.2.12.1    kleink WEAK_ALIAS(fork, _fork)
1.2.12.1    kleink #endif
1.2.12.1    kleink
1.2.12.1    kleink _SYSCALL(_fork,fork)
     1.1       cgd 	dec	%o1		! from 1 to 0 in child, 0 to -1 in parent
     1.1       cgd 	retl
1.2.12.1    kleink 	 and	%o0, %o1, %o0	! return 0 in child, pid in parent