1221828Sgrehan/* $NetBSD: __vfork14.S,v 1.1 1998/01/04 20:58:13 thorpej Exp $ */ 2221828Sgrehan 3221828Sgrehan/* 4221828Sgrehan * Copyright (c) 1992, 1993 5221828Sgrehan * The Regents of the University of California. All rights reserved. 6221828Sgrehan * 7221828Sgrehan * This software was developed by the Computer Systems Engineering group 8221828Sgrehan * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9221828Sgrehan * contributed to Berkeley. 10221828Sgrehan * 11221828Sgrehan * Redistribution and use in source and binary forms, with or without 12221828Sgrehan * modification, are permitted provided that the following conditions 13221828Sgrehan * are met: 14221828Sgrehan * 1. Redistributions of source code must retain the above copyright 15221828Sgrehan * notice, this list of conditions and the following disclaimer. 16221828Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 17221828Sgrehan * notice, this list of conditions and the following disclaimer in the 18221828Sgrehan * documentation and/or other materials provided with the distribution. 19221828Sgrehan * 3. Neither the name of the University nor the names of its contributors 20221828Sgrehan * may be used to endorse or promote products derived from this software 21221828Sgrehan * without specific prior written permission. 22221828Sgrehan * 23221828Sgrehan * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24221828Sgrehan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25221828Sgrehan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26221828Sgrehan * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27221828Sgrehan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28221828Sgrehan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29221828Sgrehan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30221828Sgrehan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31221828Sgrehan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32221828Sgrehan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33221828Sgrehan * SUCH DAMAGE. 34221828Sgrehan * 35221828Sgrehan * from: Header: Ovfork.s,v 1.1 91/07/06 13:05:56 torek Exp 36221828Sgrehan */ 37221828Sgrehan 38221828Sgrehan#include <machine/asm.h> 39221828Sgrehan#if defined(SYSLIBC_SCCS) && !defined(lint) 40221828Sgrehan#if 0 41221828Sgrehan .asciz "@(#)Ovfork.s 8.1 (Berkeley) 6/4/93" 42221828Sgrehan#else 43221828Sgrehan RCSID("$NetBSD: __vfork14.S,v 1.1 1998/01/04 20:58:13 thorpej Exp $") 44221828Sgrehan#endif 45221828Sgrehan#endif /* SYSLIBC_SCCS and not lint */ 46221828Sgrehan 47221828Sgrehan/* 48221828Sgrehan * pid = vfork(); 49221828Sgrehan * 50221828Sgrehan * %o1 == 0 in parent process, 1 in child process. 51221828Sgrehan * %o0 == pid of child in parent, pid of parent in child. 52221828Sgrehan */ 53221828Sgrehan 54221828Sgrehan#include "SYS.h" 55221828Sgrehan 56221828SgrehanSYSCALL(__vfork14) 57221828Sgrehan dec %o1 ! from 1 to 0 in child, 0 to -1 in parent 58221828Sgrehan retl 59221828Sgrehan and %o0, %o1, %o0 ! return 0 in child, pid in parent 60221828Sgrehan