1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (c) 1996, 1998, 1999, 2004 by Ralf Baechle
7 * Copyright (c) 1999 Silicon Graphics, Inc.
8 */
9#include <asm/asm.h>
10#include <asm/asm-offsets.h>
11#include <asm/regdef.h>
12
13#define EX(insn,reg,addr,handler)			\
149:	insn	reg, addr;				\
15	.section __ex_table,"a";			\
16	PTR	9b, handler;				\
17	.previous
18
19/*
20 * Return the size of a string (including the ending 0)
21 *
22 * Return 0 for error
23 */
24LEAF(__strlen_user_asm)
25	LONG_L		v0, TI_ADDR_LIMIT($28)	# pointer ok?
26	and		v0, a0
27	bnez		v0, .Lfault
28
29FEXPORT(__strlen_user_nocheck_asm)
30	move		v0, a0
311:	EX(lb, t0, (v0), .Lfault)
32	PTR_ADDIU	v0, 1
33	bnez		t0, 1b
34	PTR_SUBU	v0, a0
35	jr		ra
36	END(__strlen_user_asm)
37
38.Lfault:	move		v0, zero
39	jr		ra
40