/* SPDX-License-Identifier: GPL-2.0-only *//* *  linux/arch/arm/lib/getuser.S * *  Copyright (C) 2001 Russell King * *  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, r3 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_bad1: TUSER(ldrb)	r2, [r0]	mov	r0, #0	ret	lrENDPROC(__get_user_1)_ASM_NOKPROBE(__get_user_1) ENTRY(__get_user_2)	check_uaccess r0, 2, r1, r2, __get_user_bad#if __LINUX_ARM_ARCH__ >= 6 2: TUSER(ldrh)	r2, [r0] #else #ifdef CONFIG_CPU_USE_DOMAINSrb	.req	ip2:	ldrbt	r2, [r0], #13:	ldrbt	rb, [r0], #0#elserb	.req	r02:	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 #endif /* __LINUX_ARM_ARCH__ >= 6 */ 	mov	r0, #0	ret	lrENDPROC(__get_user_2)_ASM_NOKPROBE(__get_user_2) ENTRY(__get_user_4)	check_uaccess r0, 4, r1, r2, __get_user_bad4: TUSER(ldr)	r2, [r0]	mov	r0, #0	ret	lrENDPROC(__get_user_4)_ASM_NOKPROBE(__get_user_4) ENTRY(__get_user_8)	check_uaccess r0, 8, r1, r2, __get_user_bad8#ifdef CONFIG_THUMB2_KERNEL5: TUSER(ldr)	r2, [r0]6: TUSER(ldr)	r3, [r0, #4]#else5: TUSER(ldr)	r2, [r0], #46: TUSER(ldr)	r3, [r0]#endif	mov	r0, #0	ret	lrENDPROC(__get_user_8)_ASM_NOKPROBE(__get_user_8) #ifdef __ARMEB__ENTRY(__get_user_32t_8)	check_uaccess r0, 8, r1, r2, __get_user_bad#ifdef CONFIG_CPU_USE_DOMAINS	add	r0, r0, #47:	ldrt	r2, [r0]#else7:	ldr	r2, [r0, #4]#endif	mov	r0, #0	ret	lrENDPROC(__get_user_32t_8)_ASM_NOKPROBE(__get_user_32t_8) ENTRY(__get_user_64t_1)	check_uaccess r0, 1, r1, r2, __get_user_bad88: TUSER(ldrb)	r3, [r0]	mov	r0, #0	ret	lrENDPROC(__get_user_64t_1)_ASM_NOKPROBE(__get_user_64t_1) ENTRY(__get_user_64t_2)	check_uaccess r0, 2, r1, r2, __get_user_bad8#ifdef CONFIG_CPU_USE_DOMAINSrb	.req	ip9:	ldrbt	r3, [r0], #110:	ldrbt	rb, [r0], #0#elserb	.req	r09:	ldrb	r3, [r0]10:	ldrb	rb, [r0, #1]#endif	orr	r3, rb, r3, lsl #8	mov	r0, #0	ret	lrENDPROC(__get_user_64t_2)_ASM_NOKPROBE(__get_user_64t_2) ENTRY(__get_user_64t_4)	check_uaccess r0, 4, r1, r2, __get_user_bad811: TUSER(ldr)	r3, [r0]	mov	r0, #0	ret	lrENDPROC(__get_user_64t_4)_ASM_NOKPROBE(__get_user_64t_4)#endif __get_user_bad8:	mov	r3, #0__get_user_bad:	mov	r2, #0	mov	r0, #-EFAULT	ret	lrENDPROC(__get_user_bad)ENDPROC(__get_user_bad8)_ASM_NOKPROBE(__get_user_bad)_ASM_NOKPROBE(__get_user_bad8) .pushsection __ex_table, "a"	.long	1b, __get_user_bad	.long	2b, __get_user_bad#if __LINUX_ARM_ARCH__ < 6	.long	3b, __get_user_bad#endif	.long	4b, __get_user_bad	.long	5b, __get_user_bad8	.long	6b, __get_user_bad8#ifdef __ARMEB__	.long   7b, __get_user_bad	.long	8b, __get_user_bad8	.long	9b, __get_user_bad8	.long	10b, __get_user_bad8	.long	11b, __get_user_bad8#endif.popsection