diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/lib/putuser.S |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/arm/lib/putuser.S')
-rw-r--r-- | arch/arm/lib/putuser.S | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/lib/putuser.S b/arch/arm/lib/putuser.S new file mode 100644 index 000000000000..b09398d95aac --- /dev/null +++ b/arch/arm/lib/putuser.S | |||
@@ -0,0 +1,76 @@ | |||
1 | /* | ||
2 | * linux/arch/arm/lib/putuser.S | ||
3 | * | ||
4 | * Copyright (C) 2001 Russell King | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License version 2 as | ||
8 | * published by the Free Software Foundation. | ||
9 | * | ||
10 | * Idea from x86 version, (C) Copyright 1998 Linus Torvalds | ||
11 | * | ||
12 | * These functions have a non-standard call interface to make | ||
13 | * them more efficient, especially as they return an error | ||
14 | * value in addition to the "real" return value. | ||
15 | * | ||
16 | * __put_user_X | ||
17 | * | ||
18 | * Inputs: r0 contains the address | ||
19 | * r2, r3 contains the value | ||
20 | * Outputs: r0 is the error code | ||
21 | * lr corrupted | ||
22 | * | ||
23 | * No other registers must be altered. (see include/asm-arm/uaccess.h | ||
24 | * for specific ASM register usage). | ||
25 | * | ||
26 | * Note that ADDR_LIMIT is either 0 or 0xc0000000 | ||
27 | * Note also that it is intended that __put_user_bad is not global. | ||
28 | */ | ||
29 | #include <asm/constants.h> | ||
30 | #include <asm/thread_info.h> | ||
31 | #include <asm/errno.h> | ||
32 | |||
33 | .global __put_user_1 | ||
34 | __put_user_1: | ||
35 | 1: strbt r2, [r0] | ||
36 | mov r0, #0 | ||
37 | mov pc, lr | ||
38 | |||
39 | .global __put_user_2 | ||
40 | __put_user_2: | ||
41 | mov ip, r2, lsr #8 | ||
42 | #ifndef __ARMEB__ | ||
43 | 2: strbt r2, [r0], #1 | ||
44 | 3: strbt ip, [r0] | ||
45 | #else | ||
46 | 2: strbt ip, [r0], #1 | ||
47 | 3: strbt r2, [r0] | ||
48 | #endif | ||
49 | mov r0, #0 | ||
50 | mov pc, lr | ||
51 | |||
52 | .global __put_user_4 | ||
53 | __put_user_4: | ||
54 | 4: strt r2, [r0] | ||
55 | mov r0, #0 | ||
56 | mov pc, lr | ||
57 | |||
58 | .global __put_user_8 | ||
59 | __put_user_8: | ||
60 | 5: strt r2, [r0], #4 | ||
61 | 6: strt r3, [r0] | ||
62 | mov r0, #0 | ||
63 | mov pc, lr | ||
64 | |||
65 | __put_user_bad: | ||
66 | mov r0, #-EFAULT | ||
67 | mov pc, lr | ||
68 | |||
69 | .section __ex_table, "a" | ||
70 | .long 1b, __put_user_bad | ||
71 | .long 2b, __put_user_bad | ||
72 | .long 3b, __put_user_bad | ||
73 | .long 4b, __put_user_bad | ||
74 | .long 5b, __put_user_bad | ||
75 | .long 6b, __put_user_bad | ||
76 | .previous | ||