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Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 11 years 11 months ago. By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant. | |
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1 | /* strncpy_from_user.S: Sparc strncpy from userspace. |
2 | * |
3 | * Copyright(C) 1996 David S. Miller |
4 | */ |
5 | |
6 | #include <asm/ptrace.h> |
7 | #include <asm/errno.h> |
8 | |
9 | .text |
10 | .align 4 |
11 | |
12 | /* Must return: |
13 | * |
14 | * -EFAULT for an exception |
15 | * count if we hit the buffer limit |
16 | * bytes copied if we hit a null byte |
17 | */ |
18 | |
19 | .globl __strncpy_from_user |
20 | __strncpy_from_user: |
21 | /* %o0=dest, %o1=src, %o2=count */ |
22 | mov %o2, %o3 |
23 | 1: |
24 | subcc %o2, 1, %o2 |
25 | bneg 2f |
26 | nop |
27 | 10: |
28 | ldub [%o1], %o4 |
29 | add %o0, 1, %o0 |
30 | cmp %o4, 0 |
31 | add %o1, 1, %o1 |
32 | bne 1b |
33 | stb %o4, [%o0 - 1] |
34 | 2: |
35 | add %o2, 1, %o0 |
36 | retl |
37 | sub %o3, %o0, %o0 |
38 | |
39 | .section .fixup,#alloc,#execinstr |
40 | .align 4 |
41 | 4: |
42 | retl |
43 | mov -EFAULT, %o0 |
44 | |
45 | .section __ex_table,#alloc |
46 | .align 4 |
47 | .word 10b, 4b |
48 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9