/* | |
* __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 |