1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) 2018 Alexander Graf <agraf@suse.de>
*/
#include <config.h>
#include <linux/linkage.h>
#ifdef CONFIG_ARCH_RV64I
#define STORE_IDX(reg, idx) sd reg, (idx*8)(a0)
#define LOAD_IDX(reg, idx) ld reg, (idx*8)(a0)
#else
#define STORE_IDX(reg, idx) sw reg, (idx*4)(a0)
#define LOAD_IDX(reg, idx) lw reg, (idx*4)(a0)
#endif
.pushsection .text.setjmp, "ax"
ENTRY(setjmp)
/* Preserve all callee-saved registers and the SP */
STORE_IDX(s0, 0)
STORE_IDX(s1, 1)
STORE_IDX(s2, 2)
STORE_IDX(s3, 3)
STORE_IDX(s4, 4)
STORE_IDX(s5, 5)
STORE_IDX(s6, 6)
STORE_IDX(s7, 7)
STORE_IDX(s8, 8)
STORE_IDX(s9, 9)
STORE_IDX(s10, 10)
STORE_IDX(s11, 11)
STORE_IDX(ra, 12)
STORE_IDX(sp, 13)
li a0, 0
ret
ENDPROC(setjmp)
.popsection
.pushsection .text.longjmp, "ax"
ENTRY(longjmp)
LOAD_IDX(s0, 0)
LOAD_IDX(s1, 1)
LOAD_IDX(s2, 2)
LOAD_IDX(s3, 3)
LOAD_IDX(s4, 4)
LOAD_IDX(s5, 5)
LOAD_IDX(s6, 6)
LOAD_IDX(s7, 7)
LOAD_IDX(s8, 8)
LOAD_IDX(s9, 9)
LOAD_IDX(s10, 10)
LOAD_IDX(s11, 11)
LOAD_IDX(ra, 12)
LOAD_IDX(sp, 13)
/* Move the return value in place, but return 1 if passed 0. */
beq a1, zero, longjmp_1
mv a0, a1
ret
longjmp_1:
li a0, 1
ret
ENDPROC(longjmp)
.popsection
|
