| /* | |
| * __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 |