forked from luck/tmp_suning_uos_patched
1da177e4c3
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!
89 lines
1.4 KiB
ArmAsm
89 lines
1.4 KiB
ArmAsm
/*
|
|
* __get_user functions.
|
|
*
|
|
* (C) Copyright 2001 Hirokazu Takata
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
|
|
/*
|
|
* __get_user_X
|
|
*
|
|
* Inputs: r0 contains the address
|
|
*
|
|
* Outputs: r0 is error code (0 or -EFAULT)
|
|
* r1 contains zero-extended value
|
|
*
|
|
* These functions should not modify any other registers,
|
|
* as they get called from within inline assembly.
|
|
*/
|
|
|
|
#ifdef CONFIG_ISA_DUAL_ISSUE
|
|
|
|
.text
|
|
.balign 4
|
|
.globl __get_user_1
|
|
__get_user_1:
|
|
1: ldub r1, @r0 || ldi r0, #0
|
|
jmp r14
|
|
|
|
.balign 4
|
|
.globl __get_user_2
|
|
__get_user_2:
|
|
2: lduh r1, @r0 || ldi r0, #0
|
|
jmp r14
|
|
|
|
.balign 4
|
|
.globl __get_user_4
|
|
__get_user_4:
|
|
3: ld r1, @r0 || ldi r0, #0
|
|
jmp r14
|
|
|
|
bad_get_user:
|
|
ldi r1, #0 || ldi r0, #-14
|
|
jmp r14
|
|
|
|
#else /* not CONFIG_ISA_DUAL_ISSUE */
|
|
|
|
.text
|
|
.balign 4
|
|
.globl __get_user_1
|
|
__get_user_1:
|
|
1: ldub r1, @r0
|
|
ldi r0, #0
|
|
jmp r14
|
|
|
|
.balign 4
|
|
.globl __get_user_2
|
|
__get_user_2:
|
|
2: lduh r1, @r0
|
|
ldi r0, #0
|
|
jmp r14
|
|
|
|
.balign 4
|
|
.globl __get_user_4
|
|
__get_user_4:
|
|
3: ld r1, @r0
|
|
ldi r0, #0
|
|
jmp r14
|
|
|
|
bad_get_user:
|
|
ldi r1, #0
|
|
ldi r0, #-14
|
|
jmp r14
|
|
|
|
#endif /* not CONFIG_ISA_DUAL_ISSUE */
|
|
|
|
.section __ex_table,"a"
|
|
.long 1b,bad_get_user
|
|
.long 2b,bad_get_user
|
|
.long 3b,bad_get_user
|
|
.previous
|
|
|
|
.end
|