1*2fe8fb19SBen Gras/* $NetBSD: fork.S,v 1.5 2003/08/07 16:42:25 agc Exp $ */ 2*2fe8fb19SBen Gras 3*2fe8fb19SBen Gras/* 4*2fe8fb19SBen Gras * Copyright (c) 1992, 1993 5*2fe8fb19SBen Gras * The Regents of the University of California. All rights reserved. 6*2fe8fb19SBen Gras * 7*2fe8fb19SBen Gras * This software was developed by the Computer Systems Engineering group 8*2fe8fb19SBen Gras * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9*2fe8fb19SBen Gras * contributed to Berkeley. 10*2fe8fb19SBen Gras * 11*2fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 12*2fe8fb19SBen Gras * modification, are permitted provided that the following conditions 13*2fe8fb19SBen Gras * are met: 14*2fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 15*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 16*2fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 17*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 18*2fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 19*2fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors 20*2fe8fb19SBen Gras * may be used to endorse or promote products derived from this software 21*2fe8fb19SBen Gras * without specific prior written permission. 22*2fe8fb19SBen Gras * 23*2fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24*2fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25*2fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26*2fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27*2fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28*2fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29*2fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30*2fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31*2fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32*2fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33*2fe8fb19SBen Gras * SUCH DAMAGE. 34*2fe8fb19SBen Gras * 35*2fe8fb19SBen Gras * from: Header: fork.s,v 1.1 91/07/06 13:05:58 torek Exp 36*2fe8fb19SBen Gras */ 37*2fe8fb19SBen Gras 38*2fe8fb19SBen Gras#include <machine/asm.h> 39*2fe8fb19SBen Gras#if defined(SYSLIBC_SCCS) && !defined(lint) 40*2fe8fb19SBen Gras#if 0 41*2fe8fb19SBen Gras .asciz "@(#)fork.s 8.1 (Berkeley) 6/4/93" 42*2fe8fb19SBen Gras#else 43*2fe8fb19SBen Gras RCSID("$NetBSD: fork.S,v 1.5 2003/08/07 16:42:25 agc Exp $") 44*2fe8fb19SBen Gras#endif 45*2fe8fb19SBen Gras#endif /* SYSLIBC_SCCS and not lint */ 46*2fe8fb19SBen Gras 47*2fe8fb19SBen Gras#include "SYS.h" 48*2fe8fb19SBen Gras 49*2fe8fb19SBen Gras_SYSCALL(__fork,fork) 50*2fe8fb19SBen Gras dec %o1 ! from 1 to 0 in child, 0 to -1 in parent 51*2fe8fb19SBen Gras retl 52*2fe8fb19SBen Gras and %o0, %o1, %o0 ! return 0 in child, pid in parent 53