getuser.S (b74b953b998bcc2db91b694446f3a2619ec32de6) getuser.S (247055aa21ffef1c49dd64710d5e94c2aee19b58)
1/*
2 * linux/arch/arm/lib/getuser.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.

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23 * No other registers must be altered. (see <asm/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 __get_user_bad is not global.
28 */
29#include <linux/linkage.h>
30#include <asm/errno.h>
1/*
2 * linux/arch/arm/lib/getuser.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.

--- 14 unchanged lines hidden (view full) ---

23 * No other registers must be altered. (see <asm/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 __get_user_bad is not global.
28 */
29#include <linux/linkage.h>
30#include <asm/errno.h>
31#include <asm/domain.h>
31
32ENTRY(__get_user_1)
32
33ENTRY(__get_user_1)
331: ldrbt r2, [r0]
341: T(ldrb) r2, [r0]
34 mov r0, #0
35 mov pc, lr
36ENDPROC(__get_user_1)
37
38ENTRY(__get_user_2)
39#ifdef CONFIG_THUMB2_KERNEL
35 mov r0, #0
36 mov pc, lr
37ENDPROC(__get_user_1)
38
39ENTRY(__get_user_2)
40#ifdef CONFIG_THUMB2_KERNEL
402: ldrbt r2, [r0]
413: ldrbt r3, [r0, #1]
412: T(ldrb) r2, [r0]
423: T(ldrb) r3, [r0, #1]
42#else
43#else
432: ldrbt r2, [r0], #1
443: ldrbt r3, [r0]
442: T(ldrb) r2, [r0], #1
453: T(ldrb) r3, [r0]
45#endif
46#ifndef __ARMEB__
47 orr r2, r2, r3, lsl #8
48#else
49 orr r2, r3, r2, lsl #8
50#endif
51 mov r0, #0
52 mov pc, lr
53ENDPROC(__get_user_2)
54
55ENTRY(__get_user_4)
46#endif
47#ifndef __ARMEB__
48 orr r2, r2, r3, lsl #8
49#else
50 orr r2, r3, r2, lsl #8
51#endif
52 mov r0, #0
53 mov pc, lr
54ENDPROC(__get_user_2)
55
56ENTRY(__get_user_4)
564: ldrt r2, [r0]
574: T(ldr) r2, [r0]
57 mov r0, #0
58 mov pc, lr
59ENDPROC(__get_user_4)
60
61__get_user_bad:
62 mov r2, #0
63 mov r0, #-EFAULT
64 mov pc, lr
65ENDPROC(__get_user_bad)
66
67.pushsection __ex_table, "a"
68 .long 1b, __get_user_bad
69 .long 2b, __get_user_bad
70 .long 3b, __get_user_bad
71 .long 4b, __get_user_bad
72.popsection
58 mov r0, #0
59 mov pc, lr
60ENDPROC(__get_user_4)
61
62__get_user_bad:
63 mov r2, #0
64 mov r0, #-EFAULT
65 mov pc, lr
66ENDPROC(__get_user_bad)
67
68.pushsection __ex_table, "a"
69 .long 1b, __get_user_bad
70 .long 2b, __get_user_bad
71 .long 3b, __get_user_bad
72 .long 4b, __get_user_bad
73.popsection