1/*	$OpenBSD: tfork_thread.S,v 1.4 2021/02/03 13:00:39 kurt 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(param, size_t psize, void (*func)(void *), void *arg);
32 */
33ENTRY(__tfork_thread, 0)
34	SYSCALL(__tfork)
35	comb,<>	r0, ret0, 1f
36	 nop
37
38	/*
39	 * In child process: invoke function, then exit.
40	 */
41	copy	arg3, arg0		/* arg */
42	copy	arg2, t1
43	bl	$$dyncall, r31
44	copy	r31, rp
45
46	copy	r0, arg0
47	SYSCALL(__threxit)
48
491:
50	bv	r0(rp)
51	 nop
52
53EXIT(__tfork_thread)
54