/* * 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) 2009 DSLab, Lanzhou University, China * Author: Wu Zhangjin <wuzhangjin@gmail.com> */ #ifndef _ASM_MIPS_FTRACE_H #define _ASM_MIPS_FTRACE_H #ifdef CONFIG_FUNCTION_TRACER #define MCOUNT_ADDR ((unsigned long)(_mcount)) #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ #ifndef __ASSEMBLY__ extern void _mcount(void); #define mcount _mcount #define safe_load(load, src, dst, error) \ do { \ asm volatile ( \ "1: " load " %[tmp_dst], 0(%[tmp_src])\n" \ " li %[tmp_err], 0\n" \ "2: .insn\n" \ \ ".section .fixup, \"ax\"\n" \ "3: li %[tmp_err], 1\n" \ " j 2b\n" \ ".previous\n" \ \ ".section\t__ex_table,\"a\"\n\t" \ STR(PTR_WD) "\t1b, 3b\n\t" \ ".previous\n" \ \ : [tmp_dst] "=&r" (dst), [tmp_err] "=r" (error)\ : [tmp_src] "r" (src) \ : "memory" \ ); \ } while (0) #define safe_store(store, src, dst, error) \ do { \ asm volatile ( \ "1: " store " %[tmp_src], 0(%[tmp_dst])\n"\ " li %[tmp_err], 0\n" \ "2: .insn\n" \ \ ".section .fixup, \"ax\"\n" \ "3: li %[tmp_err], 1\n" \ " j 2b\n" \ ".previous\n" \ \ ".section\t__ex_table,\"a\"\n\t"\ STR(PTR_WD) "\t1b, 3b\n\t" \ ".previous\n" \ \ : [tmp_err] "=r" (error) \ : [tmp_dst] "r" (dst), [tmp_src] "r" (src)\ : "memory" \ ); \ } while (0) #define safe_load_code(dst, src, error) \ safe_load(STR(lw), src, dst, error) #define safe_store_code(src, dst, error) \ safe_store(STR(sw), src, dst, error) #define safe_load_stack(dst, src, error) \ safe_load(STR(PTR_L), src, dst, error) #define safe_store_stack(src, dst, error) \ safe_store(STR(PTR_S), src, dst, error) #ifdef CONFIG_DYNAMIC_FTRACE static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; } struct dyn_arch_ftrace { }; #endif /* CONFIG_DYNAMIC_FTRACE */ void prepare_ftrace_return(unsigned long *parent_ra_addr, unsigned long self_ra, unsigned long fp); #endif /* __ASSEMBLY__ */ #endif /* CONFIG_FUNCTION_TRACER */ #endif /* _ASM_MIPS_FTRACE_H */