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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* SPDX-License-Identifier: GPL-2.0 */
/* una_asm.S: Kernel unaligned trap assembler helpers.
*
* Copyright (C) 1996,2005,2008 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/errno.h>
.text
retl_efault:
retl
mov -EFAULT, %o0
/* int __do_int_store(unsigned long *dst_addr, int size,
* unsigned long *src_val)
*
* %o0 = dest_addr
* %o1 = size
* %o2 = src_val
*
* Return '0' on success, -EFAULT on failure.
*/
.globl __do_int_store
__do_int_store:
ld [%o2], %g1
cmp %o1, 2
be 2f
cmp %o1, 4
be 1f
srl %g1, 24, %g2
srl %g1, 16, %g7
4: stb %g2, [%o0]
srl %g1, 8, %g2
5: stb %g7, [%o0 + 1]
ld [%o2 + 4], %g7
6: stb %g2, [%o0 + 2]
srl %g7, 24, %g2
7: stb %g1, [%o0 + 3]
srl %g7, 16, %g1
8: stb %g2, [%o0 + 4]
srl %g7, 8, %g2
9: stb %g1, [%o0 + 5]
10: stb %g2, [%o0 + 6]
b 0f
11: stb %g7, [%o0 + 7]
1: srl %g1, 16, %g7
12: stb %g2, [%o0]
srl %g1, 8, %g2
13: stb %g7, [%o0 + 1]
14: stb %g2, [%o0 + 2]
b 0f
15: stb %g1, [%o0 + 3]
2: srl %g1, 8, %g2
16: stb %g2, [%o0]
17: stb %g1, [%o0 + 1]
0: retl
mov 0, %o0
.section __ex_table,#alloc
.word 4b, retl_efault
.word 5b, retl_efault
.word 6b, retl_efault
.word 7b, retl_efault
.word 8b, retl_efault
.word 9b, retl_efault
.word 10b, retl_efault
.word 11b, retl_efault
.word 12b, retl_efault
.word 13b, retl_efault
.word 14b, retl_efault
.word 15b, retl_efault
.word 16b, retl_efault
.word 17b, retl_efault
.previous
/* int do_int_load(unsigned long *dest_reg, int size,
* unsigned long *saddr, int is_signed)
*
* %o0 = dest_reg
* %o1 = size
* %o2 = saddr
* %o3 = is_signed
*
* Return '0' on success, -EFAULT on failure.
*/
.globl do_int_load
do_int_load:
cmp %o1, 8
be 9f
cmp %o1, 4
be 6f
4: ldub [%o2], %g1
5: ldub [%o2 + 1], %g2
sll %g1, 8, %g1
tst %o3
be 3f
or %g1, %g2, %g1
sll %g1, 16, %g1
sra %g1, 16, %g1
3: b 0f
st %g1, [%o0]
6: ldub [%o2 + 1], %g2
sll %g1, 24, %g1
7: ldub [%o2 + 2], %g7
sll %g2, 16, %g2
8: ldub [%o2 + 3], %g3
sll %g7, 8, %g7
or %g3, %g2, %g3
or %g7, %g3, %g7
or %g1, %g7, %g1
b 0f
st %g1, [%o0]
9: ldub [%o2], %g1
10: ldub [%o2 + 1], %g2
sll %g1, 24, %g1
11: ldub [%o2 + 2], %g7
sll %g2, 16, %g2
12: ldub [%o2 + 3], %g3
sll %g7, 8, %g7
or %g1, %g2, %g1
or %g7, %g3, %g7
or %g1, %g7, %g7
13: ldub [%o2 + 4], %g1
st %g7, [%o0]
14: ldub [%o2 + 5], %g2
sll %g1, 24, %g1
15: ldub [%o2 + 6], %g7
sll %g2, 16, %g2
16: ldub [%o2 + 7], %g3
sll %g7, 8, %g7
or %g1, %g2, %g1
or %g7, %g3, %g7
or %g1, %g7, %g7
st %g7, [%o0 + 4]
0: retl
mov 0, %o0
.section __ex_table,#alloc
.word 4b, retl_efault
.word 5b, retl_efault
.word 6b, retl_efault
.word 7b, retl_efault
.word 8b, retl_efault
.word 9b, retl_efault
.word 10b, retl_efault
.word 11b, retl_efault
.word 12b, retl_efault
.word 13b, retl_efault
.word 14b, retl_efault
.word 15b, retl_efault
.word 16b, retl_efault
.previous
|
