/* * 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 [31mCONFIG_EVA[0m /* Set aliases */ .global __strlen_user_asm .set __strlen_user_asm, __strlen_kernel_asm #endif __BUILD_STRLEN_ASM kernel #ifdef [31mCONFIG_EVA[0m .set push .set eva __BUILD_STRLEN_ASM user .set pop #endif |