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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [arm/] [lib/] [putuser.S] - Blame information for rev 3

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/*
 *  linux/arch/arm/lib/putuser.S
 *
 *  Copyright (C) 2001 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Idea from x86 version, (C) Copyright 1998 Linus Torvalds
 *
 * These functions have a non-standard call interface to make
 * them more efficient, especially as they return an error
 * value in addition to the "real" return value.
 *
 * __put_user_X
 *
 * Inputs:      r0 contains the address
 *              r2, r3 contains the value
 * Outputs:     r0 is the error code
 *              lr corrupted
 *
 * No other registers must be altered.  (see include/asm-arm/uaccess.h
 * for specific ASM register usage).
 *
 * Note that ADDR_LIMIT is either 0 or 0xc0000000
 * Note also that it is intended that __put_user_bad is not global.
 */
#include 
 
        .global __put_user_1
__put_user_1:
1:      strbt   r2, [r0]
        mov     r0, #0
        mov     pc, lr
 
        .global __put_user_2
__put_user_2:
        mov     ip, r2, lsr #8
#ifndef __ARMEB__
2:      strbt   r2, [r0], #1
3:      strbt   ip, [r0]
#else
2:      strbt   ip, [r0], #1
3:      strbt   r2, [r0]
#endif
        mov     r0, #0
        mov     pc, lr
 
        .global __put_user_4
__put_user_4:
4:      strt    r2, [r0]
        mov     r0, #0
        mov     pc, lr
 
        .global __put_user_8
__put_user_8:
5:      strt    r2, [r0], #4
6:      strt    r3, [r0]
        mov     r0, #0
        mov     pc, lr
 
__put_user_bad:
        mov     r0, #-EFAULT
        mov     pc, lr
 
.section __ex_table, "a"
        .long   1b, __put_user_bad
        .long   2b, __put_user_bad
        .long   3b, __put_user_bad
        .long   4b, __put_user_bad
        .long   5b, __put_user_bad
        .long   6b, __put_user_bad
.previous

Line No.	Rev	Author	Line
1	3	xianfeng	`/*`
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`
30
31			`.global __put_user_1`
32			`__put_user_1:`
33			`1: strbt r2, [r0]`
34			`mov r0, #0`
35			`mov pc, lr`
36
37			`.global __put_user_2`
38			`__put_user_2:`
39			`mov ip, r2, lsr #8`
40			`#ifndef __ARMEB__`
41			`2: strbt r2, [r0], #1`
42			`3: strbt ip, [r0]`
43			`#else`
44			`2: strbt ip, [r0], #1`
45			`3: strbt r2, [r0]`
46			`#endif`
47			`mov r0, #0`
48			`mov pc, lr`
49
50			`.global __put_user_4`
51			`__put_user_4:`
52			`4: strt r2, [r0]`
53			`mov r0, #0`
54			`mov pc, lr`
55
56			`.global __put_user_8`
57			`__put_user_8:`
58			`5: strt r2, [r0], #4`
59			`6: strt r3, [r0]`
60			`mov r0, #0`
61			`mov pc, lr`
62
63			`__put_user_bad:`
64			`mov r0, #-EFAULT`
65			`mov pc, lr`
66
67			`.section __ex_table, "a"`
68			`.long 1b, __put_user_bad`
69			`.long 2b, __put_user_bad`
70			`.long 3b, __put_user_bad`
71			`.long 4b, __put_user_bad`
72			`.long 5b, __put_user_bad`
73			`.long 6b, __put_user_bad`
74			`.previous`

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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [arm/] [lib/] [putuser.S] - Blame information for rev 3