diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/lib/getuser.S')
-rw-r--r-- | ANDROID_3.4.5/arch/arm/lib/getuser.S | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/ANDROID_3.4.5/arch/arm/lib/getuser.S b/ANDROID_3.4.5/arch/arm/lib/getuser.S deleted file mode 100644 index 9b06bb41..00000000 --- a/ANDROID_3.4.5/arch/arm/lib/getuser.S +++ /dev/null @@ -1,80 +0,0 @@ -/* - * linux/arch/arm/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 - * r1 contains the address limit, which must be preserved - * Outputs: r0 is the error code - * r2 contains the zero-extended value - * lr corrupted - * - * No other registers must be altered. (see <asm/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 <linux/linkage.h> -#include <asm/assembler.h> -#include <asm/errno.h> -#include <asm/domain.h> - -ENTRY(__get_user_1) - check_uaccess r0, 1, r1, r2, __get_user_bad -1: TUSER(ldrb) r2, [r0] - mov r0, #0 - mov pc, lr -ENDPROC(__get_user_1) - -ENTRY(__get_user_2) - check_uaccess r0, 2, r1, r2, __get_user_bad -#ifdef CONFIG_CPU_USE_DOMAINS -rb .req ip -2: ldrbt r2, [r0], #1 -3: ldrbt rb, [r0], #0 -#else -rb .req r0 -2: ldrb r2, [r0] -3: ldrb rb, [r0, #1] -#endif -#ifndef __ARMEB__ - orr r2, r2, rb, lsl #8 -#else - orr r2, rb, r2, lsl #8 -#endif - mov r0, #0 - mov pc, lr -ENDPROC(__get_user_2) - -ENTRY(__get_user_4) - check_uaccess r0, 4, r1, r2, __get_user_bad -4: TUSER(ldr) r2, [r0] - mov r0, #0 - mov pc, lr -ENDPROC(__get_user_4) - -__get_user_bad: - mov r2, #0 - mov r0, #-EFAULT - mov pc, lr -ENDPROC(__get_user_bad) - -.pushsection __ex_table, "a" - .long 1b, __get_user_bad - .long 2b, __get_user_bad - .long 3b, __get_user_bad - .long 4b, __get_user_bad -.popsection |