mirror of
https://github.com/torvalds/linux.git
synced 2024-12-21 10:31:54 +00:00
85 lines
1.3 KiB
ArmAsm
85 lines
1.3 KiB
ArmAsm
|
/*
|
||
|
|
* __put_user functions.
|
||
|
|
*
|
||
|
|
* (C) Copyright 1998 Linus Torvalds
|
||
|
|
* (C) Copyright 2001 Hirokazu Takata
|
||
|
|
*
|
||
|
|
* These functions have a non-standard call interface
|
||
|
|
* to make them more efficient.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/config.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* __put_user_X
|
||
|
|
*
|
||
|
|
* Inputs: r0 contains the address
|
||
|
|
* r1 contains the value
|
||
|
|
*
|
||
|
|
* Outputs: r0 is error code (0 or -EFAULT)
|
||
|
|
* r1 is corrupted (will contain "current_task").
|
||
|
|
*
|
||
|
|
* 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 __put_user_1
|
||
|
|
__put_user_1:
|
||
|
|
1: stb r1, @r0 || ldi r0, #0
|
||
|
|
jmp r14
|
||
|
|
|
||
|
|
.balign 4
|
||
|
|
.globl __put_user_2
|
||
|
|
__put_user_2:
|
||
|
|
2: sth r1, @r0 || ldi r0, #0
|
||
|
|
jmp r14
|
||
|
|
|
||
|
|
.balign 4
|
||
|
|
.globl __put_user_4
|
||
|
|
__put_user_4:
|
||
|
|
3: st r1, @r0 || ldi r0, #0
|
||
|
|
jmp r14
|
||
|
|
|
||
|
|
bad_put_user:
|
||
|
|
ldi r0, #-14 || jmp r14
|
||
|
|
|
||
|
|
#else /* not CONFIG_ISA_DUAL_ISSUE */
|
||
|
|
|
||
|
|
.text
|
||
|
|
.balign 4
|
||
|
|
.globl __put_user_1
|
||
|
|
__put_user_1:
|
||
|
|
1: stb r1, @r0
|
||
|
|
ldi r0, #0
|
||
|
|
jmp r14
|
||
|
|
|
||
|
|
.balign 4
|
||
|
|
.globl __put_user_2
|
||
|
|
__put_user_2:
|
||
|
|
2: sth r1, @r0
|
||
|
|
ldi r0, #0
|
||
|
|
jmp r14
|
||
|
|
|
||
|
|
.balign 4
|
||
|
|
.globl __put_user_4
|
||
|
|
__put_user_4:
|
||
|
|
3: st r1, @r0
|
||
|
|
ldi r0, #0
|
||
|
|
jmp r14
|
||
|
|
|
||
|
|
bad_put_user:
|
||
|
|
ldi r0, #-14
|
||
|
|
jmp r14
|
||
|
|
|
||
|
|
#endif /* not CONFIG_ISA_DUAL_ISSUE */
|
||
|
|
|
||
|
|
.section __ex_table,"a"
|
||
|
|
.long 1b,bad_put_user
|
||
|
|
.long 2b,bad_put_user
|
||
|
|
.long 3b,bad_put_user
|
||
|
|
.previous
|