2024-09-09 08:52:07 +00:00
|
|
|
/*
|
|
|
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
|
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
|
|
|
* for more details.
|
|
|
|
|
*
|
2024-09-09 08:57:42 +00:00
|
|
|
* Copyright (C) 1996, 1998, 1999, 2004 by Ralf Baechle
|
|
|
|
|
* Copyright (C) 1999 Silicon Graphics, Inc.
|
|
|
|
|
* Copyright (C) 2011 MIPS Technologies, Inc.
|
2024-09-09 08:52:07 +00:00
|
|
|
*/
|
|
|
|
|
#include <asm/asm.h>
|
|
|
|
|
#include <asm/asm-offsets.h>
|
|
|
|
|
#include <asm/regdef.h>
|
|
|
|
|
|
|
|
|
|
#define EX(insn,reg,addr,handler) \
|
|
|
|
|
9: insn reg, addr; \
|
|
|
|
|
.section __ex_table,"a"; \
|
|
|
|
|
PTR 9b, handler; \
|
|
|
|
|
.previous
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Return the size of a string (including the ending 0)
|
|
|
|
|
*
|
|
|
|
|
* Return 0 for error
|
|
|
|
|
*/
|
2024-09-09 08:57:42 +00:00
|
|
|
.macro __BUILD_STRLEN_ASM func
|
|
|
|
|
LEAF(__strlen_\func\()_asm)
|
2024-09-09 08:52:07 +00:00
|
|
|
LONG_L v0, TI_ADDR_LIMIT($28) # pointer ok?
|
|
|
|
|
and v0, a0
|
2024-09-09 08:57:42 +00:00
|
|
|
bnez v0, .Lfault\@
|
2024-09-09 08:52:07 +00:00
|
|
|
|
2024-09-09 08:57:42 +00:00
|
|
|
FEXPORT(__strlen_\func\()_nocheck_asm)
|
2024-09-09 08:52:07 +00:00
|
|
|
move v0, a0
|
2024-09-09 08:57:42 +00:00
|
|
|
.ifeqs "\func", "kernel"
|
|
|
|
|
1: EX(lbu, v1, (v0), .Lfault\@)
|
|
|
|
|
.else
|
|
|
|
|
1: EX(lbue, v1, (v0), .Lfault\@)
|
|
|
|
|
.endif
|
2024-09-09 08:52:07 +00:00
|
|
|
PTR_ADDIU v0, 1
|
2024-09-09 08:57:42 +00:00
|
|
|
bnez v1, 1b
|
2024-09-09 08:52:07 +00:00
|
|
|
PTR_SUBU v0, a0
|
|
|
|
|
jr ra
|
2024-09-09 08:57:42 +00:00
|
|
|
END(__strlen_\func\()_asm)
|
2024-09-09 08:52:07 +00:00
|
|
|
|
2024-09-09 08:57:42 +00:00
|
|
|
.Lfault\@: move v0, zero
|
2024-09-09 08:52:07 +00:00
|
|
|
jr ra
|
2024-09-09 08:57:42 +00:00
|
|
|
.endm
|
|
|
|
|
|
|
|
|
|
#ifndef CONFIG_EVA
|
|
|
|
|
/* Set aliases */
|
|
|
|
|
.global __strlen_user_asm
|
|
|
|
|
.global __strlen_user_nocheck_asm
|
|
|
|
|
.set __strlen_user_asm, __strlen_kernel_asm
|
|
|
|
|
.set __strlen_user_nocheck_asm, __strlen_kernel_nocheck_asm
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
__BUILD_STRLEN_ASM kernel
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_EVA
|
|
|
|
|
|
|
|
|
|
.set push
|
|
|
|
|
.set eva
|
|
|
|
|
__BUILD_STRLEN_ASM user
|
|
|
|
|
.set pop
|
|
|
|
|
#endif
|
