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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
#
# arch/arm/setjmp.S
#
# setjmp/longjmp for the ARM architecture
#
#include <klibc/asmmacros.h>
#ifndef __thumb__
#
# "Pure ARM" version
#
# The jmp_buf is assumed to contain the following, in order:
# r4
# r5
# r6
# r7
# r8
# r9
# r10
# fp
# sp
# lr
#
.text
.balign 4
.globl setjmp
.type setjmp, #function
setjmp:
stmia r0, {r4, r5, r6, r7, r8, r9, r10, fp, sp, lr}
mov r0, #0
BX(lr)
.size setjmp,.-setjmp
.text
.balign 4
.globl longjmp
.type longjmp, #function
longjmp:
ldmia r0, {r4, r5, r6, r7, r8, r9, r10, fp, sp, lr}
movs r0, r1
moveq r0, #1
BX(lr)
.size longjmp,.-longjmp
#else /* __thumb__ */
#
# Thumb version
#
# The jmp_buf is assumed to contain the following, in order:
# lr
# r4
# r5
# r6
# r7
# r8
# r9
# r10
# fp
# sp
#
.text
.balign 4
.globl setjmp
.type setjmp, #function
.thumb_func
setjmp:
mov r2, r0
mov r3, lr
stmia r0!, {r3, r4, r5, r6, r7}
mov r3, r8
mov r4, r9
mov r5, r10
mov r6, fp
mov r7, sp
stmia r0!, {r3, r4, r5, r6, r7}
/* Do not trash r4 .. r7 */
ldmia r2!, {r3, r4, r5, r6, r7}
mov r0, #0
BX(lr)
.size setjmp,.-setjmp
.text
.balign 4
.globl longjmp
.type longjmp, #function
.thumb_func
longjmp:
mov r2, r0
add r0, #5*4
ldmia r0!, {r3, r4, r5, r6, r7}
mov r8, r3
mov r9, r4
mov r10, r5
mov fp, r6
mov sp, r7
ldmia r2!, {r3, r4, r5, r6, r7}
mov r0, r1
bne 1f
mov r0, #1
1: BX(r3)
.size longjmp,.-longjmp
#endif /* __thumb__ */
|
