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4#include <linux/uaccess.h>
5#include <linux/types.h>
6
7unsigned long raw_copy_from_user(void *to, const void *from,
8 unsigned long n)
9{
10 int tmp, nsave;
11
12 __asm__ __volatile__(
13 "0: cmpnei %1, 0 \n"
14 " bf 7f \n"
15 " mov %3, %1 \n"
16 " or %3, %2 \n"
17 " andi %3, 3 \n"
18 " cmpnei %3, 0 \n"
19 " bf 1f \n"
20 " br 5f \n"
21 "1: cmplti %0, 16 \n"
22 " bt 3f \n"
23 "2: ldw %3, (%2, 0) \n"
24 "10: ldw %4, (%2, 4) \n"
25 " stw %3, (%1, 0) \n"
26 " stw %4, (%1, 4) \n"
27 "11: ldw %3, (%2, 8) \n"
28 "12: ldw %4, (%2, 12) \n"
29 " stw %3, (%1, 8) \n"
30 " stw %4, (%1, 12) \n"
31 " addi %2, 16 \n"
32 " addi %1, 16 \n"
33 " subi %0, 16 \n"
34 " br 1b \n"
35 "3: cmplti %0, 4 \n"
36 " bt 5f \n"
37 "4: ldw %3, (%2, 0) \n"
38 " stw %3, (%1, 0) \n"
39 " addi %2, 4 \n"
40 " addi %1, 4 \n"
41 " subi %0, 4 \n"
42 " br 3b \n"
43 "5: cmpnei %0, 0 \n"
44 " bf 7f \n"
45 "6: ldb %3, (%2, 0) \n"
46 " stb %3, (%1, 0) \n"
47 " addi %2, 1 \n"
48 " addi %1, 1 \n"
49 " subi %0, 1 \n"
50 " br 5b \n"
51 "8: stw %3, (%1, 0) \n"
52 " subi %0, 4 \n"
53 " bf 7f \n"
54 "9: subi %0, 8 \n"
55 " bf 7f \n"
56 "13: stw %3, (%1, 8) \n"
57 " subi %0, 12 \n"
58 " bf 7f \n"
59 ".section __ex_table, \"a\" \n"
60 ".align 2 \n"
61 ".long 2b, 7f \n"
62 ".long 4b, 7f \n"
63 ".long 6b, 7f \n"
64 ".long 10b, 8b \n"
65 ".long 11b, 9b \n"
66 ".long 12b,13b \n"
67 ".previous \n"
68 "7: \n"
69 : "=r"(n), "=r"(to), "=r"(from), "=r"(nsave),
70 "=r"(tmp)
71 : "0"(n), "1"(to), "2"(from)
72 : "memory");
73
74 return n;
75}
76EXPORT_SYMBOL(raw_copy_from_user);
77
78unsigned long raw_copy_to_user(void *to, const void *from,
79 unsigned long n)
80{
81 int w0, w1, w2, w3;
82
83 __asm__ __volatile__(
84 "0: cmpnei %1, 0 \n"
85 " bf 8f \n"
86 " mov %3, %1 \n"
87 " or %3, %2 \n"
88 " andi %3, 3 \n"
89 " cmpnei %3, 0 \n"
90 " bf 1f \n"
91 " br 5f \n"
92 "1: cmplti %0, 16 \n"
93 " bt 3f \n"
94 " ldw %3, (%2, 0) \n"
95 " ldw %4, (%2, 4) \n"
96 " ldw %5, (%2, 8) \n"
97 " ldw %6, (%2, 12) \n"
98 "2: stw %3, (%1, 0) \n"
99 "9: stw %4, (%1, 4) \n"
100 "10: stw %5, (%1, 8) \n"
101 "11: stw %6, (%1, 12) \n"
102 " addi %2, 16 \n"
103 " addi %1, 16 \n"
104 " subi %0, 16 \n"
105 " br 1b \n"
106 "3: cmplti %0, 4 \n"
107 " bt 5f \n"
108 " ldw %3, (%2, 0) \n"
109 "4: stw %3, (%1, 0) \n"
110 " addi %2, 4 \n"
111 " addi %1, 4 \n"
112 " subi %0, 4 \n"
113 " br 3b \n"
114 "5: cmpnei %0, 0 \n"
115 " bf 13f \n"
116 " ldb %3, (%2, 0) \n"
117 "6: stb %3, (%1, 0) \n"
118 " addi %2, 1 \n"
119 " addi %1, 1 \n"
120 " subi %0, 1 \n"
121 " br 5b \n"
122 "7: subi %0, 4 \n"
123 "8: subi %0, 4 \n"
124 "12: subi %0, 4 \n"
125 " br 13f \n"
126 ".section __ex_table, \"a\" \n"
127 ".align 2 \n"
128 ".long 2b, 13f \n"
129 ".long 4b, 13f \n"
130 ".long 6b, 13f \n"
131 ".long 9b, 12b \n"
132 ".long 10b, 8b \n"
133 ".long 11b, 7b \n"
134 ".previous \n"
135 "13: \n"
136 : "=r"(n), "=r"(to), "=r"(from), "=r"(w0),
137 "=r"(w1), "=r"(w2), "=r"(w3)
138 : "0"(n), "1"(to), "2"(from)
139 : "memory");
140
141 return n;
142}
143EXPORT_SYMBOL(raw_copy_to_user);
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165
166long __strncpy_from_user(char *dst, const char *src, long count)
167{
168 long res, faultres;
169 int tmp;
170
171 __asm__ __volatile__(
172 " cmpnei %3, 0 \n"
173 " bf 4f \n"
174 "1: cmpnei %1, 0 \n"
175 " bf 5f \n"
176 "2: ldb %4, (%3, 0) \n"
177 " stb %4, (%2, 0) \n"
178 " cmpnei %4, 0 \n"
179 " bf 3f \n"
180 " addi %3, 1 \n"
181 " addi %2, 1 \n"
182 " subi %1, 1 \n"
183 " br 1b \n"
184 "3: subu %0, %1 \n"
185 " br 5f \n"
186 "4: mov %0, %5 \n"
187 " br 5f \n"
188 ".section __ex_table, \"a\" \n"
189 ".align 2 \n"
190 ".long 2b, 4b \n"
191 ".previous \n"
192 "5: \n"
193 : "=r"(res), "=r"(count), "=r"(dst),
194 "=r"(src), "=r"(tmp), "=r"(faultres)
195 : "5"(-EFAULT), "0"(count), "1"(count),
196 "2"(dst), "3"(src)
197 : "memory");
198
199 return res;
200}
201EXPORT_SYMBOL(__strncpy_from_user);
202
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212
213
214long __strnlen_user(const char *s, long n)
215{
216 unsigned long res, tmp;
217
218 __asm__ __volatile__(
219 " cmpnei %1, 0 \n"
220 " bf 3f \n"
221 "1: cmpnei %0, 0 \n"
222 " bf 3f \n"
223 "2: ldb %3, (%1, 0) \n"
224 " cmpnei %3, 0 \n"
225 " bf 3f \n"
226 " subi %0, 1 \n"
227 " addi %1, 1 \n"
228 " br 1b \n"
229 "3: subu %2, %0 \n"
230 " addi %2, 1 \n"
231 " br 5f \n"
232 "4: movi %0, 0 \n"
233 " br 5f \n"
234 ".section __ex_table, \"a\" \n"
235 ".align 2 \n"
236 ".long 2b, 4b \n"
237 ".previous \n"
238 "5: \n"
239 : "=r"(n), "=r"(s), "=r"(res), "=r"(tmp)
240 : "0"(n), "1"(s), "2"(n)
241 : "memory");
242
243 return res;
244}
245EXPORT_SYMBOL(__strnlen_user);
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257
258unsigned long
259__clear_user(void __user *to, unsigned long n)
260{
261 int data, value, tmp;
262
263 __asm__ __volatile__(
264 "0: cmpnei %1, 0 \n"
265 " bf 7f \n"
266 " mov %3, %1 \n"
267 " andi %3, 3 \n"
268 " cmpnei %3, 0 \n"
269 " bf 1f \n"
270 " br 5f \n"
271 "1: cmplti %0, 32 \n"
272 " bt 3f \n"
273 "8: stw %2, (%1, 0) \n"
274 "10: stw %2, (%1, 4) \n"
275 "11: stw %2, (%1, 8) \n"
276 "12: stw %2, (%1, 12) \n"
277 "13: stw %2, (%1, 16) \n"
278 "14: stw %2, (%1, 20) \n"
279 "15: stw %2, (%1, 24) \n"
280 "16: stw %2, (%1, 28) \n"
281 " addi %1, 32 \n"
282 " subi %0, 32 \n"
283 " br 1b \n"
284 "3: cmplti %0, 4 \n"
285 " bt 5f \n"
286 "4: stw %2, (%1, 0) \n"
287 " addi %1, 4 \n"
288 " subi %0, 4 \n"
289 " br 3b \n"
290 "5: cmpnei %0, 0 \n"
291 "9: bf 7f \n"
292 "6: stb %2, (%1, 0) \n"
293 " addi %1, 1 \n"
294 " subi %0, 1 \n"
295 " br 5b \n"
296 ".section __ex_table,\"a\" \n"
297 ".align 2 \n"
298 ".long 8b, 9b \n"
299 ".long 10b, 9b \n"
300 ".long 11b, 9b \n"
301 ".long 12b, 9b \n"
302 ".long 13b, 9b \n"
303 ".long 14b, 9b \n"
304 ".long 15b, 9b \n"
305 ".long 16b, 9b \n"
306 ".long 4b, 9b \n"
307 ".long 6b, 9b \n"
308 ".previous \n"
309 "7: \n"
310 : "=r"(n), "=r" (data), "=r"(value), "=r"(tmp)
311 : "0"(n), "1"(to), "2"(0)
312 : "memory");
313
314 return n;
315}
316EXPORT_SYMBOL(__clear_user);
317
