1*2fe8fb19SBen Gras/* $NetBSD: compat_Ovfork.S,v 1.2 2006/01/06 04:30:33 uwe Exp $ */ 2*2fe8fb19SBen Gras 3*2fe8fb19SBen Gras/*- 4*2fe8fb19SBen Gras * Copyright (c) 1990 The Regents of the University of California. 5*2fe8fb19SBen Gras * All rights reserved. 6*2fe8fb19SBen Gras * 7*2fe8fb19SBen Gras * This code is derived from software contributed to Berkeley by 8*2fe8fb19SBen Gras * William Jolitz. 9*2fe8fb19SBen Gras * 10*2fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 11*2fe8fb19SBen Gras * modification, are permitted provided that the following conditions 12*2fe8fb19SBen Gras * are met: 13*2fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 14*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 15*2fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 16*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 17*2fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 18*2fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors 19*2fe8fb19SBen Gras * may be used to endorse or promote products derived from this software 20*2fe8fb19SBen Gras * without specific prior written permission. 21*2fe8fb19SBen Gras * 22*2fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23*2fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24*2fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25*2fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26*2fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27*2fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28*2fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29*2fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30*2fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31*2fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32*2fe8fb19SBen Gras * SUCH DAMAGE. 33*2fe8fb19SBen Gras * 34*2fe8fb19SBen Gras * from: @(#)Ovfork.s 5.1 (Berkeley) 4/23/90 35*2fe8fb19SBen Gras */ 36*2fe8fb19SBen Gras 37*2fe8fb19SBen Gras#include <machine/asm.h> 38*2fe8fb19SBen Gras#if defined(SYSLIBC_SCCS) && !defined(lint) 39*2fe8fb19SBen Gras RCSID("$NetBSD: compat_Ovfork.S,v 1.2 2006/01/06 04:30:33 uwe Exp $") 40*2fe8fb19SBen Gras#endif /* SYSLIBC_SCCS and not lint */ 41*2fe8fb19SBen Gras 42*2fe8fb19SBen Gras#include "SYS.h" 43*2fe8fb19SBen Gras 44*2fe8fb19SBen GrasWARN_REFERENCES(vfork, \ 45*2fe8fb19SBen Gras "warning: reference to compatibility vfork(); include <unistd.h> for correct reference") 46*2fe8fb19SBen Gras 47*2fe8fb19SBen Gras/* 48*2fe8fb19SBen Gras * pid = vfork(); 49*2fe8fb19SBen Gras * 50*2fe8fb19SBen Gras * r1 == 0 in parent process, r1 == 1 in child process. 51*2fe8fb19SBen Gras * r0 == pid of child in parent, r0 == pid of parent in child. 52*2fe8fb19SBen Gras * 53*2fe8fb19SBen Gras */ 54*2fe8fb19SBen GrasENTRY(vfork) 55*2fe8fb19SBen Gras mov #SYS_vfork, r0 56*2fe8fb19SBen Gras trapa #0x80 57*2fe8fb19SBen Gras bf err 58*2fe8fb19SBen Gras 59*2fe8fb19SBen Gras add #0xff, r1 /* from 1 to 0 in child, 0 to -1 in parent */ 60*2fe8fb19SBen Gras rts 61*2fe8fb19SBen Gras and r1, r0 /* 0 in child, child pid in parent */ 62*2fe8fb19SBen Gras 63*2fe8fb19SBen Graserr: 64*2fe8fb19SBen Gras JUMP_CERROR 65*2fe8fb19SBen Gras 66*2fe8fb19SBen Gras SET_ENTRY_SIZE(vfork) 67