2005-04-16 15:20:36 -07:00
										 
									 
								 
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								/*
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								 *  linux/arch/arm/lib/strnlen_user.S
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								 *
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								 *  Copyright (C) 1995-2000 Russell King
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								 *
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								 * This program is free software; you can redistribute it and/or modify
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								 * it under the terms of the GNU General Public License version 2 as
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								 * published by the Free Software Foundation.
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								 */
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								#include <linux/linkage.h>
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								#include <asm/assembler.h>
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								#include <asm/errno.h>
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									.text
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									.align	5
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											2006-06-21 14:44:52 +01:00
										 
									 
								 
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								/* Prototype: unsigned long __strnlen_user(const char *str, long n)
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								 * Purpose  : get length of a string in user memory
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								 * Params   : str - address of string in user memory
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								 * Returns  : length of string *including terminator*
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								 *	      or zero on exception, or n + 1 if too long
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								 */
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											2006-06-21 14:44:52 +01:00
										 
									 
								 
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								ENTRY(__strnlen_user)
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									mov	r2, r0
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								1:
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											2009-07-24 12:32:57 +01:00
										 
									 
								 
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									ldrusr	r3, r0, 1
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									teq	r3, #0
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									beq	2f
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									subs	r1, r1, #1
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									bne	1b
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									add	r0, r0, #1
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								2:	sub	r0, r0, r2
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											2006-06-25 11:37:09 +01:00
										 
									 
								 
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									mov	pc, lr
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											2008-08-28 11:22:32 +01:00
										 
									 
								 
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								ENDPROC(__strnlen_user)
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											2005-04-16 15:20:36 -07:00
										 
									 
								 
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											2010-04-19 10:15:03 +01:00
										 
									 
								 
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									.pushsection .fixup,"ax"
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									.align	0
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								9001:	mov	r0, #0
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											2006-06-25 11:37:09 +01:00
										 
									 
								 
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									mov	pc, lr
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											2010-04-19 10:15:03 +01:00
										 
									 
								 
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									.popsection
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