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Diffstat (limited to 'arch/arm26/lib/getuser.S')
-rw-r--r-- | arch/arm26/lib/getuser.S | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/arch/arm26/lib/getuser.S b/arch/arm26/lib/getuser.S deleted file mode 100644 index 2b1de7fbfe1..00000000000 --- a/arch/arm26/lib/getuser.S +++ /dev/null @@ -1,112 +0,0 @@ -/* - * linux/arch/arm26/lib/getuser.S - * - * Copyright (C) 2001 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Idea from x86 version, (C) Copyright 1998 Linus Torvalds - * - * 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. - * - * __get_user_X - * - * Inputs: r0 contains the address - * Outputs: r0 is the error code - * r1, r2 contains the zero-extended value - * lr corrupted - * - * No other registers must be altered. (see include/asm-arm/uaccess.h - * for specific ASM register usage). - * - * Note that ADDR_LIMIT is either 0 or 0xc0000000. - * Note also that it is intended that __get_user_bad is not global. - */ -#include <asm/asm-offsets.h> -#include <asm/thread_info.h> -#include <asm/errno.h> - - .global __get_user_1 -__get_user_1: - bic r1, sp, #0x1f00 - bic r1, r1, #0x00ff - str lr, [sp, #-4]! - ldr r1, [r1, #TI_ADDR_LIMIT] - sub r1, r1, #1 - cmp r0, r1 - bge __get_user_bad - cmp r0, #0x02000000 -1: ldrlsbt r1, [r0] - ldrgeb r1, [r0] - mov r0, #0 - ldmfd sp!, {pc}^ - - .global __get_user_2 -__get_user_2: - bic r2, sp, #0x1f00 - bic r2, r2, #0x00ff - str lr, [sp, #-4]! - ldr r2, [r2, #TI_ADDR_LIMIT] - sub r2, r2, #2 - cmp r0, r2 - bge __get_user_bad - cmp r0, #0x02000000 -2: ldrlsbt r1, [r0], #1 -3: ldrlsbt r2, [r0] - ldrgeb r1, [r0], #1 - ldrgeb r2, [r0] - orr r1, r1, r2, lsl #8 - mov r0, #0 - ldmfd sp!, {pc}^ - - .global __get_user_4 -__get_user_4: - bic r1, sp, #0x1f00 - bic r1, r1, #0x00ff - str lr, [sp, #-4]! - ldr r1, [r1, #TI_ADDR_LIMIT] - sub r1, r1, #4 - cmp r0, r1 - bge __get_user_bad - cmp r0, #0x02000000 -4: ldrlst r1, [r0] - ldrge r1, [r0] - mov r0, #0 - ldmfd sp!, {pc}^ - - .global __get_user_8 -__get_user_8: - bic r2, sp, #0x1f00 - bic r2, r2, #0x00ff - str lr, [sp, #-4]! - ldr r2, [r2, #TI_ADDR_LIMIT] - sub r2, r2, #8 - cmp r0, r2 - bge __get_user_bad_8 - cmp r0, #0x02000000 -5: ldrlst r1, [r0], #4 -6: ldrlst r2, [r0] - ldrge r1, [r0], #4 - ldrge r2, [r0] - mov r0, #0 - ldmfd sp!, {pc}^ - -__get_user_bad_8: - mov r2, #0 -__get_user_bad: - mov r1, #0 - mov r0, #-EFAULT - ldmfd sp!, {pc}^ - -.section __ex_table, "a" - .long 1b, __get_user_bad - .long 2b, __get_user_bad - .long 3b, __get_user_bad - .long 4b, __get_user_bad - .long 5b, __get_user_bad_8 - .long 6b, __get_user_bad_8 -.previous |