1/*	$OpenBSD: support.S,v 1.3 2022/03/22 06:51:12 miod Exp $	*/
2
3/*-
4 * Copyright (c) 2015-2020 Ruslan Bukin <br@bsdpad.com>
5 * All rights reserved.
6 *
7 * Portions of this software were developed by SRI International and the
8 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
9 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
10 *
11 * Portions of this software were developed by the University of Cambridge
12 * Computer Laboratory as part of the CTSRD Project, with support from the
13 * UK Higher Education Innovation Fund (HEIF).
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 *    notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 *    notice, this list of conditions and the following disclaimer in the
22 *    documentation and/or other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include "assym.h"
38#include <machine/asm.h>
39#include <machine/setjmp.h>
40
41ENTRY(setjmp)
42	/* Store the stack pointer */
43	sd	sp, 0(a0)
44	addi	a0, a0, 8
45
46	/* Store the general purpose registers and ra */
47	sd	s0, (0 * 8)(a0)
48	sd	s1, (1 * 8)(a0)
49	sd	s2, (2 * 8)(a0)
50	sd	s3, (3 * 8)(a0)
51	sd	s4, (4 * 8)(a0)
52	sd	s5, (5 * 8)(a0)
53	sd	s6, (6 * 8)(a0)
54	sd	s7, (7 * 8)(a0)
55	sd	s8, (8 * 8)(a0)
56	sd	s9, (9 * 8)(a0)
57	sd	s10, (10 * 8)(a0)
58	sd	s11, (11 * 8)(a0)
59	sd	ra, (12 * 8)(a0)
60
61	/* Return zero */
62	li	a0, 0
63	ret
64END(setjmp)
65
66ENTRY(longjmp)
67	/* Restore the stack pointer */
68	ld	sp, 0(a0)
69	addi	a0, a0, 8
70
71	/* Restore the general purpose registers and ra */
72	ld	s0, (0 * 8)(a0)
73	ld	s1, (1 * 8)(a0)
74	ld	s2, (2 * 8)(a0)
75	ld	s3, (3 * 8)(a0)
76	ld	s4, (4 * 8)(a0)
77	ld	s5, (5 * 8)(a0)
78	ld	s6, (6 * 8)(a0)
79	ld	s7, (7 * 8)(a0)
80	ld	s8, (8 * 8)(a0)
81	ld	s9, (9 * 8)(a0)
82	ld	s10, (10 * 8)(a0)
83	ld	s11, (11 * 8)(a0)
84	ld	ra, (12 * 8)(a0)
85
86	/* Return nonzero */
87	li	a0, 1
88	ret
89END(longjmp)
90