/* * __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