ftrace.h
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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) 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) "\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) "\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 */
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_FUNCTION_TRACER */
#endif /* _ASM_MIPS_FTRACE_H */