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| /*
| * 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.
| *
| * Copyright (C) 1996, 1998, 1999, 2004 by Ralf Baechle
| * Copyright (C) 1999 Silicon Graphics, Inc.
| * Copyright (C) 2011 MIPS Technologies, Inc.
| */
| #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
| */
| .macro __BUILD_STRLEN_ASM func
| LEAF(__strlen_\func\()_asm)
| LONG_L v0, TI_ADDR_LIMIT($28) # pointer ok?
| and v0, a0
| bnez v0, .Lfault\@
|
| move v0, a0
| .ifeqs "\func", "kernel"
| 1: EX(lbu, v1, (v0), .Lfault\@)
| .else
| 1: EX(lbue, v1, (v0), .Lfault\@)
| .endif
| PTR_ADDIU v0, 1
| bnez v1, 1b
| PTR_SUBU v0, a0
| jr ra
| END(__strlen_\func\()_asm)
|
| .Lfault\@: move v0, zero
| jr ra
| .endm
|
| #ifndef CONFIG_EVA
| /* Set aliases */
| .global __strlen_user_asm
| .set __strlen_user_asm, __strlen_kernel_asm
| #endif
|
| __BUILD_STRLEN_ASM kernel
|
| #ifdef CONFIG_EVA
|
| .set push
| .set eva
| __BUILD_STRLEN_ASM user
| .set pop
| #endif
|
|
