| /* |
| * __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 |
