1/*	$OpenBSD: _setjmp.S,v 1.3 2021/05/14 00:57:03 drahn Exp $	*/
2/*
3 * Copyright (c) 2020 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
19#include "DEFS.h"
20#include <machine/setjmp.h>
21
22ENTRY(_setjmp)
23	RETGUARD_SETUP(_setjmp, t6)
24
25	sd	sp, (1 * 8)(a0)
26	/* Store the general purpose registers and ra */
27	sd	s0, (2 * 8)(a0)
28	sd	s1, (3 * 8)(a0)
29	sd	s2, (4 * 8)(a0)
30	sd	s3, (5 * 8)(a0)
31	sd	s4, (6 * 8)(a0)
32	sd	s5, (7 * 8)(a0)
33	sd	s6, (8 * 8)(a0)
34	sd	s7, (9 * 8)(a0)
35	sd	s8, (10 * 8)(a0)
36	sd	s9, (11 * 8)(a0)
37	sd	s10, (12 * 8)(a0)
38	sd	s11, (13 * 8)(a0)
39	sd	ra, (14 * 8)(a0)
40
41#ifndef _STANDALONE
42	/* Store the fp registers */
43	fsd	fs0, (15 * 8)(a0)
44	fsd	fs1, (16 * 8)(a0)
45	fsd	fs2, (17 * 8)(a0)
46	fsd	fs3, (18 * 8)(a0)
47	fsd	fs4, (19 * 8)(a0)
48	fsd	fs5, (20 * 8)(a0)
49	fsd	fs6, (21 * 8)(a0)
50	fsd	fs7, (22 * 8)(a0)
51	fsd	fs8, (23 * 8)(a0)
52	fsd	fs9, (24 * 8)(a0)
53	fsd	fs10, (25 * 8)(a0)
54	fsd	fs11, (26 * 8)(a0)
55	frcsr	t0
56	sd	t0, (27 * 8)(a0)
57#endif
58
59	/* Return value */
60	mv	a0, x0
61	RETGUARD_CHECK(_setjmp, t6)
62	ret
63END_STRONG(_setjmp)
64
65ENTRY(_longjmp)
66	RETGUARD_SYMBOL(_longjmp)
67	RETGUARD_LOAD_RANDOM(_longjmp, t6)
68
69	/* Restore the stack pointer */
70	ld	t0, (1 * 8)(a0)
71	mv	sp, t0
72
73	/* Store the general purpose registers and ra */
74	ld	s0, (2 * 8)(a0)
75	ld	s1, (3 * 8)(a0)
76	ld	s2, (4 * 8)(a0)
77	ld	s3, (5 * 8)(a0)
78	ld	s4, (6 * 8)(a0)
79	ld	s5, (7 * 8)(a0)
80	ld	s6, (8 * 8)(a0)
81	ld	s7, (9 * 8)(a0)
82	ld	s8, (10 * 8)(a0)
83	ld	s9, (11 * 8)(a0)
84	ld	s10, (12 * 8)(a0)
85	ld	s11, (13 * 8)(a0)
86	ld	ra, (14 * 8)(a0)
87
88#ifndef _STANDALONE
89	/* Store the fp registers */
90	fld	fs0, (15 * 8)(a0)
91	fld	fs1, (16 * 8)(a0)
92	fld	fs2, (17 * 8)(a0)
93	fld	fs3, (18 * 8)(a0)
94	fld	fs4, (19 * 8)(a0)
95	fld	fs5, (20 * 8)(a0)
96	fld	fs6, (21 * 8)(a0)
97	fld	fs7, (22 * 8)(a0)
98	fld	fs8, (23 * 8)(a0)
99	fld	fs9, (24 * 8)(a0)
100	fld	fs10, (25 * 8)(a0)
101	fld	fs11, (26 * 8)(a0)
102	ld	t0, (27 * 8)(a0)
103	fscsr	t0
104#endif
105
106	/* Load the return value */
107	li	a0, 1
108	beqz	a1, 1f
109	mv	a0, a1
1101:
111	RETGUARD_CHECK(_longjmp, t6)
112	ret
113
114END_STRONG(_longjmp)
115