mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 08:26:49 +07:00
47003497dd
Rename all includes to use asm-offsets.h to match generic name Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
110 lines
2.8 KiB
ArmAsm
110 lines
2.8 KiB
ArmAsm
/*
|
|
* linux/arch/arm26/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
|
|
* r1, r2 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 <asm/asm-offsets.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/errno.h>
|
|
|
|
.global __put_user_1
|
|
__put_user_1:
|
|
bic r2, sp, #0x1f00
|
|
bic r2, r2, #0x00ff
|
|
str lr, [sp, #-4]!
|
|
ldr r2, [r2, #TI_ADDR_LIMIT]
|
|
sub r2, r2, #1
|
|
cmp r0, r2
|
|
bge __put_user_bad
|
|
1: cmp r0, #0x02000000
|
|
strlsbt r1, [r0]
|
|
strgeb r1, [r0]
|
|
mov r0, #0
|
|
ldmfd sp!, {pc}^
|
|
|
|
.global __put_user_2
|
|
__put_user_2:
|
|
bic r2, sp, #0x1f00
|
|
bic r2, r2, #0x00ff
|
|
str lr, [sp, #-4]!
|
|
ldr r2, [r2, #TI_ADDR_LIMIT]
|
|
sub r2, r2, #2
|
|
cmp r0, r2
|
|
bge __put_user_bad
|
|
2: cmp r0, #0x02000000
|
|
strlsbt r1, [r0], #1
|
|
strgeb r1, [r0], #1
|
|
mov r1, r1, lsr #8
|
|
3: strlsbt r1, [r0]
|
|
strgeb r1, [r0]
|
|
mov r0, #0
|
|
ldmfd sp!, {pc}^
|
|
|
|
.global __put_user_4
|
|
__put_user_4:
|
|
bic r2, sp, #0x1f00
|
|
bic r2, r2, #0x00ff
|
|
str lr, [sp, #-4]!
|
|
ldr r2, [r2, #TI_ADDR_LIMIT]
|
|
sub r2, r2, #4
|
|
cmp r0, r2
|
|
4: bge __put_user_bad
|
|
cmp r0, #0x02000000
|
|
strlst r1, [r0]
|
|
strge r1, [r0]
|
|
mov r0, #0
|
|
ldmfd sp!, {pc}^
|
|
|
|
.global __put_user_8
|
|
__put_user_8:
|
|
bic ip, sp, #0x1f00
|
|
bic ip, ip, #0x00ff
|
|
str lr, [sp, #-4]!
|
|
ldr ip, [ip, #TI_ADDR_LIMIT]
|
|
sub ip, ip, #8
|
|
cmp r0, ip
|
|
bge __put_user_bad
|
|
cmp r0, #0x02000000
|
|
5: strlst r1, [r0], #4
|
|
6: strlst r2, [r0]
|
|
strge r1, [r0], #4
|
|
strge r2, [r0]
|
|
mov r0, #0
|
|
ldmfd sp!, {pc}^
|
|
|
|
__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
|