1*553d6ca3Suwe/* $NetBSD: compat_Ovfork.S,v 1.2 2006/01/06 04:30:33 uwe Exp $ */ 2bdfc6e2eSuwe 3bdfc6e2eSuwe/*- 4bdfc6e2eSuwe * Copyright (c) 1990 The Regents of the University of California. 5bdfc6e2eSuwe * All rights reserved. 6bdfc6e2eSuwe * 7bdfc6e2eSuwe * This code is derived from software contributed to Berkeley by 8bdfc6e2eSuwe * William Jolitz. 9bdfc6e2eSuwe * 10bdfc6e2eSuwe * Redistribution and use in source and binary forms, with or without 11bdfc6e2eSuwe * modification, are permitted provided that the following conditions 12bdfc6e2eSuwe * are met: 13bdfc6e2eSuwe * 1. Redistributions of source code must retain the above copyright 14bdfc6e2eSuwe * notice, this list of conditions and the following disclaimer. 15bdfc6e2eSuwe * 2. Redistributions in binary form must reproduce the above copyright 16bdfc6e2eSuwe * notice, this list of conditions and the following disclaimer in the 17bdfc6e2eSuwe * documentation and/or other materials provided with the distribution. 18bdfc6e2eSuwe * 3. Neither the name of the University nor the names of its contributors 19bdfc6e2eSuwe * may be used to endorse or promote products derived from this software 20bdfc6e2eSuwe * without specific prior written permission. 21bdfc6e2eSuwe * 22bdfc6e2eSuwe * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23bdfc6e2eSuwe * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24bdfc6e2eSuwe * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25bdfc6e2eSuwe * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26bdfc6e2eSuwe * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27bdfc6e2eSuwe * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28bdfc6e2eSuwe * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29bdfc6e2eSuwe * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30bdfc6e2eSuwe * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31bdfc6e2eSuwe * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32bdfc6e2eSuwe * SUCH DAMAGE. 33bdfc6e2eSuwe * 34bdfc6e2eSuwe * from: @(#)Ovfork.s 5.1 (Berkeley) 4/23/90 35bdfc6e2eSuwe */ 36bdfc6e2eSuwe 37bdfc6e2eSuwe#include <machine/asm.h> 38bdfc6e2eSuwe#if defined(SYSLIBC_SCCS) && !defined(lint) 39*553d6ca3Suwe RCSID("$NetBSD: compat_Ovfork.S,v 1.2 2006/01/06 04:30:33 uwe Exp $") 40bdfc6e2eSuwe#endif /* SYSLIBC_SCCS and not lint */ 41bdfc6e2eSuwe 42bdfc6e2eSuwe#include "SYS.h" 43bdfc6e2eSuwe 44*553d6ca3SuweWARN_REFERENCES(vfork, \ 45*553d6ca3Suwe "warning: reference to compatibility vfork(); include <unistd.h> for correct reference") 46*553d6ca3Suwe 47bdfc6e2eSuwe/* 48bdfc6e2eSuwe * pid = vfork(); 49bdfc6e2eSuwe * 50bdfc6e2eSuwe * r1 == 0 in parent process, r1 == 1 in child process. 51bdfc6e2eSuwe * r0 == pid of child in parent, r0 == pid of parent in child. 52bdfc6e2eSuwe * 53bdfc6e2eSuwe */ 54bdfc6e2eSuweENTRY(vfork) 55*553d6ca3Suwe mov #SYS_vfork, r0 56bdfc6e2eSuwe trapa #0x80 57bdfc6e2eSuwe bf err 58bdfc6e2eSuwe 59*553d6ca3Suwe add #0xff, r1 /* from 1 to 0 in child, 0 to -1 in parent */ 60*553d6ca3Suwe rts 61*553d6ca3Suwe and r1, r0 /* 0 in child, child pid in parent */ 62*553d6ca3Suwe 63*553d6ca3Suweerr: 64*553d6ca3Suwe JUMP_CERROR 65*553d6ca3Suwe 66*553d6ca3Suwe SET_ENTRY_SIZE(vfork) 67