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Diffstat (limited to 'arch/s390/lib/uaccess64.S')
-rw-r--r-- | arch/s390/lib/uaccess64.S | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/arch/s390/lib/uaccess64.S b/arch/s390/lib/uaccess64.S deleted file mode 100644 index 1f755be22f92..000000000000 --- a/arch/s390/lib/uaccess64.S +++ /dev/null | |||
@@ -1,207 +0,0 @@ | |||
1 | /* | ||
2 | * arch/s390x/lib/uaccess.S | ||
3 | * __copy_{from|to}_user functions. | ||
4 | * | ||
5 | * s390 | ||
6 | * Copyright (C) 2000,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation | ||
7 | * Authors(s): Martin Schwidefsky (schwidefsky@de.ibm.com) | ||
8 | * | ||
9 | * These functions have standard call interface | ||
10 | */ | ||
11 | |||
12 | #include <linux/errno.h> | ||
13 | #include <asm/lowcore.h> | ||
14 | #include <asm/asm-offsets.h> | ||
15 | |||
16 | .text | ||
17 | .align 4 | ||
18 | .globl __copy_from_user_asm | ||
19 | # %r2 = to, %r3 = n, %r4 = from | ||
20 | __copy_from_user_asm: | ||
21 | slgr %r0,%r0 | ||
22 | 0: mvcp 0(%r3,%r2),0(%r4),%r0 | ||
23 | jnz 1f | ||
24 | slgr %r2,%r2 | ||
25 | br %r14 | ||
26 | 1: la %r2,256(%r2) | ||
27 | la %r4,256(%r4) | ||
28 | aghi %r3,-256 | ||
29 | 2: mvcp 0(%r3,%r2),0(%r4),%r0 | ||
30 | jnz 1b | ||
31 | 3: slgr %r2,%r2 | ||
32 | br %r14 | ||
33 | 4: lghi %r0,-4096 | ||
34 | lgr %r5,%r4 | ||
35 | slgr %r5,%r0 | ||
36 | ngr %r5,%r0 # %r5 = (%r4 + 4096) & -4096 | ||
37 | slgr %r5,%r4 # %r5 = #bytes to next user page boundary | ||
38 | clgr %r3,%r5 # copy crosses next page boundary ? | ||
39 | jnh 6f # no, the current page faulted | ||
40 | # move with the reduced length which is < 256 | ||
41 | 5: mvcp 0(%r5,%r2),0(%r4),%r0 | ||
42 | slgr %r3,%r5 | ||
43 | 6: lgr %r2,%r3 | ||
44 | br %r14 | ||
45 | .section __ex_table,"a" | ||
46 | .quad 0b,4b | ||
47 | .quad 2b,4b | ||
48 | .quad 5b,6b | ||
49 | .previous | ||
50 | |||
51 | .align 4 | ||
52 | .text | ||
53 | .globl __copy_to_user_asm | ||
54 | # %r2 = from, %r3 = n, %r4 = to | ||
55 | __copy_to_user_asm: | ||
56 | slgr %r0,%r0 | ||
57 | 0: mvcs 0(%r3,%r4),0(%r2),%r0 | ||
58 | jnz 1f | ||
59 | slgr %r2,%r2 | ||
60 | br %r14 | ||
61 | 1: la %r2,256(%r2) | ||
62 | la %r4,256(%r4) | ||
63 | aghi %r3,-256 | ||
64 | 2: mvcs 0(%r3,%r4),0(%r2),%r0 | ||
65 | jnz 1b | ||
66 | 3: slgr %r2,%r2 | ||
67 | br %r14 | ||
68 | 4: lghi %r0,-4096 | ||
69 | lgr %r5,%r4 | ||
70 | slgr %r5,%r0 | ||
71 | ngr %r5,%r0 # %r5 = (%r4 + 4096) & -4096 | ||
72 | slgr %r5,%r4 # %r5 = #bytes to next user page boundary | ||
73 | clgr %r3,%r5 # copy crosses next page boundary ? | ||
74 | jnh 6f # no, the current page faulted | ||
75 | # move with the reduced length which is < 256 | ||
76 | 5: mvcs 0(%r5,%r4),0(%r2),%r0 | ||
77 | slgr %r3,%r5 | ||
78 | 6: lgr %r2,%r3 | ||
79 | br %r14 | ||
80 | .section __ex_table,"a" | ||
81 | .quad 0b,4b | ||
82 | .quad 2b,4b | ||
83 | .quad 5b,6b | ||
84 | .previous | ||
85 | |||
86 | .align 4 | ||
87 | .text | ||
88 | .globl __copy_in_user_asm | ||
89 | # %r2 = from, %r3 = n, %r4 = to | ||
90 | __copy_in_user_asm: | ||
91 | aghi %r3,-1 | ||
92 | jo 6f | ||
93 | sacf 256 | ||
94 | bras %r1,4f | ||
95 | 0: aghi %r3,257 | ||
96 | 1: mvc 0(1,%r4),0(%r2) | ||
97 | la %r2,1(%r2) | ||
98 | la %r4,1(%r4) | ||
99 | aghi %r3,-1 | ||
100 | jnz 1b | ||
101 | 2: lgr %r2,%r3 | ||
102 | br %r14 | ||
103 | 3: mvc 0(256,%r4),0(%r2) | ||
104 | la %r2,256(%r2) | ||
105 | la %r4,256(%r4) | ||
106 | 4: aghi %r3,-256 | ||
107 | jnm 3b | ||
108 | 5: ex %r3,4(%r1) | ||
109 | sacf 0 | ||
110 | 6: slgr %r2,%r2 | ||
111 | br 14 | ||
112 | .section __ex_table,"a" | ||
113 | .quad 1b,2b | ||
114 | .quad 3b,0b | ||
115 | .quad 5b,0b | ||
116 | .previous | ||
117 | |||
118 | .align 4 | ||
119 | .text | ||
120 | .globl __clear_user_asm | ||
121 | # %r2 = to, %r3 = n | ||
122 | __clear_user_asm: | ||
123 | slgr %r0,%r0 | ||
124 | larl %r5,empty_zero_page | ||
125 | 1: mvcs 0(%r3,%r2),0(%r5),%r0 | ||
126 | jnz 2f | ||
127 | slgr %r2,%r2 | ||
128 | br %r14 | ||
129 | 2: la %r2,256(%r2) | ||
130 | aghi %r3,-256 | ||
131 | 3: mvcs 0(%r3,%r2),0(%r5),%r0 | ||
132 | jnz 2b | ||
133 | 4: slgr %r2,%r2 | ||
134 | br %r14 | ||
135 | 5: lghi %r0,-4096 | ||
136 | lgr %r4,%r2 | ||
137 | slgr %r4,%r0 | ||
138 | ngr %r4,%r0 # %r4 = (%r2 + 4096) & -4096 | ||
139 | slgr %r4,%r2 # %r4 = #bytes to next user page boundary | ||
140 | clgr %r3,%r4 # clear crosses next page boundary ? | ||
141 | jnh 7f # no, the current page faulted | ||
142 | # clear with the reduced length which is < 256 | ||
143 | 6: mvcs 0(%r4,%r2),0(%r5),%r0 | ||
144 | slgr %r3,%r4 | ||
145 | 7: lgr %r2,%r3 | ||
146 | br %r14 | ||
147 | .section __ex_table,"a" | ||
148 | .quad 1b,5b | ||
149 | .quad 3b,5b | ||
150 | .quad 6b,7b | ||
151 | .previous | ||
152 | |||
153 | .align 4 | ||
154 | .text | ||
155 | .globl __strncpy_from_user_asm | ||
156 | # %r2 = count, %r3 = dst, %r4 = src | ||
157 | __strncpy_from_user_asm: | ||
158 | lghi %r0,0 | ||
159 | lgr %r1,%r4 | ||
160 | la %r2,0(%r2,%r4) # %r2 points to first byte after string | ||
161 | sacf 256 | ||
162 | 0: srst %r2,%r1 | ||
163 | jo 0b | ||
164 | sacf 0 | ||
165 | lgr %r1,%r2 | ||
166 | jh 1f # \0 found in string ? | ||
167 | aghi %r1,1 # include \0 in copy | ||
168 | 1: slgr %r1,%r4 # %r1 = copy length (without \0) | ||
169 | slgr %r2,%r4 # %r2 = return length (including \0) | ||
170 | 2: mvcp 0(%r1,%r3),0(%r4),%r0 | ||
171 | jnz 3f | ||
172 | br %r14 | ||
173 | 3: la %r3,256(%r3) | ||
174 | la %r4,256(%r4) | ||
175 | aghi %r1,-256 | ||
176 | mvcp 0(%r1,%r3),0(%r4),%r0 | ||
177 | jnz 3b | ||
178 | br %r14 | ||
179 | 4: sacf 0 | ||
180 | lghi %r2,-EFAULT | ||
181 | br %r14 | ||
182 | .section __ex_table,"a" | ||
183 | .quad 0b,4b | ||
184 | .previous | ||
185 | |||
186 | .align 4 | ||
187 | .text | ||
188 | .globl __strnlen_user_asm | ||
189 | # %r2 = count, %r3 = src | ||
190 | __strnlen_user_asm: | ||
191 | lghi %r0,0 | ||
192 | lgr %r1,%r3 | ||
193 | la %r2,0(%r2,%r3) # %r2 points to first byte after string | ||
194 | sacf 256 | ||
195 | 0: srst %r2,%r1 | ||
196 | jo 0b | ||
197 | sacf 0 | ||
198 | aghi %r2,1 # strnlen_user result includes the \0 | ||
199 | # or return count+1 if \0 not found | ||
200 | slgr %r2,%r3 | ||
201 | br %r14 | ||
202 | 2: sacf 0 | ||
203 | slgr %r2,%r2 # return 0 on exception | ||
204 | br %r14 | ||
205 | .section __ex_table,"a" | ||
206 | .quad 0b,2b | ||
207 | .previous | ||