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6bc9a396 CL |
1 | /* |
2 | * arch/score/lib/string.S | |
3 | * | |
4 | * Score Processor version. | |
5 | * | |
6 | * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. | |
7 | * Chen Liqin <liqin.chen@sunplusct.com> | |
8 | * Lennox Wu <lennox.wu@sunplusct.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, see the file COPYING, or write | |
22 | * to the Free Software Foundation, Inc., | |
23 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <linux/linkage.h> | |
27 | #include <asm-generic/errno.h> | |
28 | ||
29 | .text | |
30 | .align 2 | |
31 | ENTRY(__strncpy_from_user) | |
32 | cmpi.c r6, 0 | |
33 | mv r9, r6 | |
34 | ble .L2 | |
35 | 0: lbu r7, [r5] | |
36 | ldi r8, 0 | |
37 | 1: sb r7, [r4] | |
38 | 2: lb r6, [r5] | |
39 | cmp.c r6, r8 | |
40 | beq .L2 | |
41 | ||
42 | .L5: | |
43 | addi r8, 1 | |
44 | cmp.c r8, r9 | |
45 | beq .L7 | |
46 | 3: lbu r6, [r5, 1]+ | |
47 | 4: sb r6, [r4, 1]+ | |
48 | 5: lb r7, [r5] | |
49 | cmpi.c r7, 0 | |
50 | bne .L5 | |
51 | .L7: | |
52 | mv r4, r8 | |
53 | br r3 | |
54 | .L2: | |
55 | ldi r8, 0 | |
56 | mv r4, r8 | |
57 | br r3 | |
58 | .section .fixup, "ax" | |
59 | 99: | |
60 | ldi r4, -EFAULT | |
61 | br r3 | |
62 | .previous | |
63 | .section __ex_table, "a" | |
64 | .align 2 | |
65 | .word 0b ,99b | |
66 | .word 1b ,99b | |
67 | .word 2b ,99b | |
68 | .word 3b ,99b | |
69 | .word 4b ,99b | |
70 | .word 5b ,99b | |
71 | .previous | |
72 | ||
73 | .align 2 | |
74 | ENTRY(__strnlen_user) | |
75 | cmpi.c r5, 0 | |
76 | ble .L11 | |
77 | 0: lb r6, [r4] | |
78 | ldi r7, 0 | |
79 | cmp.c r6, r7 | |
80 | beq .L11 | |
81 | .L15: | |
82 | addi r7, 1 | |
83 | cmp.c r7, r5 | |
84 | beq .L23 | |
85 | 1: lb r6, [r4,1]+ | |
86 | cmpi.c r6, 0 | |
87 | bne .L15 | |
88 | .L23: | |
89 | addri r4, r7, 1 | |
90 | br r3 | |
91 | ||
92 | .L11: | |
93 | ldi r4, 1 | |
94 | br r3 | |
95 | .section .fixup, "ax" | |
96 | 99: | |
97 | ldi r4, 0 | |
98 | br r3 | |
99 | ||
100 | .section __ex_table,"a" | |
101 | .align 2 | |
102 | .word 0b, 99b | |
103 | .word 1b, 99b | |
104 | .previous | |
105 | ||
106 | .align 2 | |
107 | ENTRY(__strlen_user) | |
108 | 0: lb r6, [r4] | |
109 | mv r7, r4 | |
110 | extsb r6, r6 | |
111 | cmpi.c r6, 0 | |
112 | mv r4, r6 | |
113 | beq .L27 | |
114 | .L28: | |
115 | 1: lb r6, [r7, 1]+ | |
116 | addi r6, 1 | |
117 | cmpi.c r6, 0 | |
118 | bne .L28 | |
119 | .L27: | |
120 | br r3 | |
121 | .section .fixup, "ax" | |
122 | ldi r4, 0x0 | |
123 | br r3 | |
124 | 99: | |
125 | ldi r4, 0 | |
126 | br r3 | |
127 | .previous | |
128 | .section __ex_table, "a" | |
129 | .align 2 | |
130 | .word 0b ,99b | |
131 | .word 1b ,99b | |
132 | .previous | |
133 | ||
134 | .align 2 | |
135 | ENTRY(__copy_tofrom_user) | |
136 | cmpi.c r6, 0 | |
137 | mv r10,r6 | |
138 | beq .L32 | |
139 | ldi r9, 0 | |
140 | .L34: | |
141 | add r6, r5, r9 | |
142 | 0: lbu r8, [r6] | |
143 | add r7, r4, r9 | |
144 | 1: sb r8, [r7] | |
145 | addi r9, 1 | |
146 | cmp.c r9, r10 | |
147 | bne .L34 | |
148 | .L32: | |
149 | ldi r4, 0 | |
150 | br r3 | |
151 | .section .fixup, "ax" | |
152 | 99: | |
153 | sub r4, r10, r9 | |
154 | br r3 | |
155 | .previous | |
156 | .section __ex_table, "a" | |
157 | .align 2 | |
158 | .word 0b, 99b | |
159 | .word 1b, 99b | |
160 | .previous | |
161 | ||
162 | .align 2 | |
163 | ENTRY(__clear_user) | |
164 | cmpi.c r5, 0 | |
165 | beq .L38 | |
166 | ldi r6, 0 | |
167 | mv r7, r6 | |
168 | .L40: | |
169 | addi r6, 1 | |
170 | 0: sb r7, [r4]+, 1 | |
171 | cmp.c r6, r5 | |
172 | bne .L40 | |
173 | .L38: | |
174 | ldi r4, 0 | |
175 | br r3 | |
176 | ||
177 | .section .fixup, "ax" | |
80524e93 | 178 | 99: |
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179 | br r3 |
180 | .previous | |
181 | .section __ex_table, "a" | |
182 | .align 2 | |
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183 | .word 0b, 99b |
184 | .previous |