1/* $OpenBSD: tfork_thread.S,v 1.7 2022/05/24 17:20:23 guenther Exp $ */ 2/* 3 * Copyright (c) 2005 Dale Rahn <drahn@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18#include "SYS.h" 19 20/* 21 * r0 r1 r2 r3 22 * __tfork_thread(param, psize, start_fnc, start_arg); 23 */ 24 25ENTRY(__tfork_thread) 26 SYSTRAP(__tfork) 27 bcs CERROR 28 29 /* check if we are parent or child */ 30 cmp r0, #0 31 movne pc, lr 32 33 /* child */ 34 mov r0, r3 35 mov lr, pc 36 mov pc, r2 37 nop 38 SYSTRAP(__threxit) 39 udf #0 40END(__tfork_thread) 41