/* SPDX-License-Identifier: GPL-2.0-only *//* *  linux/arch/arm/lib/putuser.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. * * __put_user_X * * Inputs:	r0 contains the address *		r1 contains the address limit, which must be preserved *		r2, r3 contains the value * Outputs:	r0 is the error code *		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 __put_user_bad is not global. */#include <linux/linkage.h>#include <asm/assembler.h>#include <asm/errno.h>#include <asm/domain.h> ENTRY(__put_user_1)	check_uaccess r0, 1, r1, ip, __put_user_bad1: TUSER(strb)	r2, [r0]	mov	r0, #0	ret	lrENDPROC(__put_user_1) ENTRY(__put_user_2)	check_uaccess r0, 2, r1, ip, __put_user_bad#if __LINUX_ARM_ARCH__ >= 6 2: TUSER(strh)	r2, [r0] #else 	mov	ip, r2, lsr #8#ifndef __ARMEB__2: TUSER(strb)	r2, [r0], #13: TUSER(strb)	ip, [r0]#else2: TUSER(strb)	ip, [r0], #13: TUSER(strb)	r2, [r0]#endif #endif /* __LINUX_ARM_ARCH__ >= 6 */	mov	r0, #0	ret	lrENDPROC(__put_user_2) ENTRY(__put_user_4)	check_uaccess r0, 4, r1, ip, __put_user_bad4: TUSER(str)	r2, [r0]	mov	r0, #0	ret	lrENDPROC(__put_user_4) ENTRY(__put_user_8)	check_uaccess r0, 8, r1, ip, __put_user_bad#ifdef CONFIG_THUMB2_KERNEL5: TUSER(str)	r2, [r0]6: TUSER(str)	r3, [r0, #4]#else5: TUSER(str)	r2, [r0], #46: TUSER(str)	r3, [r0]#endif	mov	r0, #0	ret	lrENDPROC(__put_user_8) __put_user_bad:	mov	r0, #-EFAULT	ret	lrENDPROC(__put_user_bad) .pushsection __ex_table, "a"	.long	1b, __put_user_bad	.long	2b, __put_user_bad#if __LINUX_ARM_ARCH__ < 6	.long	3b, __put_user_bad#endif	.long	4b, __put_user_bad	.long	5b, __put_user_bad	.long	6b, __put_user_bad.popsection