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 by Ralf Baechle
7 * Copyright (c) 1999 Silicon Graphics, Inc.
8 */
9#include <asm/asm.h>
10#include <asm/offset.h>
11#include <asm/regdef.h>
12#include <asm/sgidefs.h>
13
14#define EX(insn,reg,addr,handler)			\
159:	insn	reg, addr;				\
16	.section __ex_table,"a";			\
17	PTR	9b, handler;				\
18	.previous
19
20/*
21 * Return the size of a string (including the ending 0)
22 *
23 * Return 0 for error
24 */
25LEAF(__strlen_user_asm)
26	lw	v0, THREAD_CURDS($28)	# pointer ok?
27	and	v0, a0
28	bltz	v0, fault
29
30FEXPORT(__strlen_user_nocheck_asm)
31	move	v0, a0
321:	EX(lb, t0, (v0), fault)
33	addiu	v0, 1
34	bnez	t0, 1b
35	subu	v0, a0
36	jr	ra
37	END(__strlen_user_asm)
38
39fault:	move	v0, zero
40	jr	ra
41