1/* $OpenBSD: tfork_thread.S,v 1.2 2012/06/21 00:56:59 guenther Exp $ */ 2 3/* 4 * Copyright (c) 2005, Miodrag Vallat 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include "SYS.h" 29 30/* 31 * int __tfork_thread(const struct __tfork *param, size_t psize, void (*func)(void *), void *arg); 32 */ 33ENTRY(__tfork_thread) 34 or r13, r0, __SYSCALLNAME(SYS_,__tfork) 35 tb0 0, r0, 128 /* corrupts r2 and r3 in the child */ 36 br __cerror 37 38 bcnd eq0, r2, 1f 39 40 /* 41 * In parent process: just return. 42 */ 43 jmp r1 44 451: 46 /* 47 * In child process: invoke function, then exit. 48 */ 49 jsr.n r4 /* func */ 50 or r2, r5, r0 /* arg */ 51 52 or r13, r0, __SYSCALLNAME(SYS_,__threxit) 53 tb0 0, r0, 128 54