Blame - arch/arm/lib/putuser.S - LeafOS-Devices/android_kernel_samsung_gta4xl

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Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	1	/*
				2	* linux/arch/arm/lib/putuser.S
				3	*
				4	* Copyright (C) 2001 Russell King
				5	*
				6	* This program is free software; you can redistribute it and/or modify
				7	* it under the terms of the GNU General Public License version 2 as
				8	* published by the Free Software Foundation.
				9	*
				10	* Idea from x86 version, (C) Copyright 1998 Linus Torvalds
				11	*
				12	* These functions have a non-standard call interface to make
				13	* them more efficient, especially as they return an error
				14	* value in addition to the "real" return value.
				15	*
				16	* __put_user_X
				17	*
				18	* Inputs: r0 contains the address
Russell King	8404663	2012-09-07 18:22:28 +0100	[diff] [blame]	19	* r1 contains the address limit, which must be preserved
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	20	* r2, r3 contains the value
				21	* Outputs: r0 is the error code
				22	* lr corrupted
				23	*
Russell King	4baa992	2008-08-02 10:55:55 +0100	[diff] [blame]	24	* No other registers must be altered. (see <asm/uaccess.h>
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	25	* for specific ASM register usage).
				26	*
				27	* Note that ADDR_LIMIT is either 0 or 0xc0000000
				28	* Note also that it is intended that __put_user_bad is not global.
				29	*/
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	30	#include <linux/linkage.h>
Russell King	8404663	2012-09-07 18:22:28 +0100	[diff] [blame]	31	#include <asm/assembler.h>
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	32	#include <asm/errno.h>
Catalin Marinas	247055a	2010-09-13 16:03:21 +0100	[diff] [blame]	33	#include <asm/domain.h>
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	34
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	35	ENTRY(__put_user_1)
Russell King	8404663	2012-09-07 18:22:28 +0100	[diff] [blame]	36	check_uaccess r0, 1, r1, ip, __put_user_bad
Catalin Marinas	4e7682d	2012-01-25 11:38:13 +0100	[diff] [blame]	37	1: TUSER(strb) r2, [r0]
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	38	mov r0, #0
Russell King	6ebbf2c	2014-06-30 16:29:12 +0100	[diff] [blame]	39	ret lr
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	40	ENDPROC(__put_user_1)
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	41
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	42	ENTRY(__put_user_2)
Russell King	8404663	2012-09-07 18:22:28 +0100	[diff] [blame]	43	check_uaccess r0, 2, r1, ip, __put_user_bad
Vincent Whitchurch	e82dd54	2018-11-09 10:12:30 +0100	[diff] [blame]	44	#if __LINUX_ARM_ARCH__ >= 6
				45
				46	2: TUSER(strh) r2, [r0]
				47
Catalin Marinas	8b59278	2009-07-24 12:32:57 +0100	[diff] [blame]	48	#else
Vincent Whitchurch	e82dd54	2018-11-09 10:12:30 +0100	[diff] [blame]	49
				50	mov ip, r2, lsr #8
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	51	#ifndef __ARMEB__
Catalin Marinas	4e7682d	2012-01-25 11:38:13 +0100	[diff] [blame]	52	2: TUSER(strb) r2, [r0], #1
				53	3: TUSER(strb) ip, [r0]
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	54	#else
Catalin Marinas	4e7682d	2012-01-25 11:38:13 +0100	[diff] [blame]	55	2: TUSER(strb) ip, [r0], #1
				56	3: TUSER(strb) r2, [r0]
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	57	#endif
Vincent Whitchurch	e82dd54	2018-11-09 10:12:30 +0100	[diff] [blame]	58
				59	#endif /* __LINUX_ARM_ARCH__ >= 6 */
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	60	mov r0, #0
Russell King	6ebbf2c	2014-06-30 16:29:12 +0100	[diff] [blame]	61	ret lr
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	62	ENDPROC(__put_user_2)
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	63
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	64	ENTRY(__put_user_4)
Russell King	8404663	2012-09-07 18:22:28 +0100	[diff] [blame]	65	check_uaccess r0, 4, r1, ip, __put_user_bad
Catalin Marinas	4e7682d	2012-01-25 11:38:13 +0100	[diff] [blame]	66	4: TUSER(str) r2, [r0]
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	67	mov r0, #0
Russell King	6ebbf2c	2014-06-30 16:29:12 +0100	[diff] [blame]	68	ret lr
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	69	ENDPROC(__put_user_4)
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	70
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	71	ENTRY(__put_user_8)
Russell King	8404663	2012-09-07 18:22:28 +0100	[diff] [blame]	72	check_uaccess r0, 8, r1, ip, __put_user_bad
Catalin Marinas	8b59278	2009-07-24 12:32:57 +0100	[diff] [blame]	73	#ifdef CONFIG_THUMB2_KERNEL
Catalin Marinas	4e7682d	2012-01-25 11:38:13 +0100	[diff] [blame]	74	5: TUSER(str) r2, [r0]
				75	6: TUSER(str) r3, [r0, #4]
Catalin Marinas	8b59278	2009-07-24 12:32:57 +0100	[diff] [blame]	76	#else
Catalin Marinas	4e7682d	2012-01-25 11:38:13 +0100	[diff] [blame]	77	5: TUSER(str) r2, [r0], #4
				78	6: TUSER(str) r3, [r0]
Catalin Marinas	8b59278	2009-07-24 12:32:57 +0100	[diff] [blame]	79	#endif
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	80	mov r0, #0
Russell King	6ebbf2c	2014-06-30 16:29:12 +0100	[diff] [blame]	81	ret lr
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	82	ENDPROC(__put_user_8)
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	83
				84	__put_user_bad:
				85	mov r0, #-EFAULT
Russell King	6ebbf2c	2014-06-30 16:29:12 +0100	[diff] [blame]	86	ret lr
Catalin Marinas	93ed397	2008-08-28 11:22:32 +0100	[diff] [blame]	87	ENDPROC(__put_user_bad)
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	88
Russell King	4260415	2010-04-19 10:15:03 +0100	[diff] [blame]	89	.pushsection __ex_table, "a"
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	90	.long 1b, __put_user_bad
				91	.long 2b, __put_user_bad
Vincent Whitchurch	e82dd54	2018-11-09 10:12:30 +0100	[diff] [blame]	92	#if __LINUX_ARM_ARCH__ < 6
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	93	.long 3b, __put_user_bad
Vincent Whitchurch	e82dd54	2018-11-09 10:12:30 +0100	[diff] [blame]	94	#endif
Linus Torvalds	1da177e	2005-04-16 15:20:36 -0700	[diff] [blame]	95	.long 4b, __put_user_bad
				96	.long 5b, __put_user_bad
				97	.long 6b, __put_user_bad
Russell King	4260415	2010-04-19 10:15:03 +0100	[diff] [blame]	98	.popsection