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- /*
- * __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
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