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Viewing changes to arch/mips/include/asm/ftrace.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/mips/include/asm/ftrace.h
 
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/*
 
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 * This file is subject to the terms and conditions of the GNU General Public
 
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 * License.  See the file "COPYING" in the main directory of this archive for
 
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 * more details.
 
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 *
 
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 * Copyright (C) 2009 DSLab, Lanzhou University, China
 
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 * Author: Wu Zhangjin <wuzhangjin@gmail.com>
 
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 */
 
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#ifndef _ASM_MIPS_FTRACE_H
 
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#define _ASM_MIPS_FTRACE_H
 
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#ifdef CONFIG_FUNCTION_TRACER
 
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#define MCOUNT_ADDR ((unsigned long)(_mcount))
 
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#define MCOUNT_INSN_SIZE 4              /* sizeof mcount call */
 
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#ifndef __ASSEMBLY__
 
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extern void _mcount(void);
 
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#define mcount _mcount
 
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#define safe_load(load, src, dst, error)                \
 
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do {                                                    \
 
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        asm volatile (                                  \
 
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                "1: " load " %[" STR(dst) "], 0(%[" STR(src) "])\n"\
 
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                "   li %[" STR(error) "], 0\n"          \
 
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                "2:\n"                                  \
 
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                                                        \
 
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                ".section .fixup, \"ax\"\n"             \
 
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                "3: li %[" STR(error) "], 1\n"          \
 
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                "   j 2b\n"                             \
 
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                ".previous\n"                           \
 
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                                                        \
 
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                ".section\t__ex_table,\"a\"\n\t"        \
 
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                STR(PTR) "\t1b, 3b\n\t"                 \
 
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                ".previous\n"                           \
 
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                                                        \
 
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                : [dst] "=&r" (dst), [error] "=r" (error)\
 
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                : [src] "r" (src)                       \
 
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                : "memory"                              \
 
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        );                                              \
 
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} while (0)
 
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#define safe_store(store, src, dst, error)      \
 
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do {                                            \
 
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        asm volatile (                          \
 
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                "1: " store " %[" STR(src) "], 0(%[" STR(dst) "])\n"\
 
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                "   li %[" STR(error) "], 0\n"  \
 
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                "2:\n"                          \
 
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                                                \
 
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                ".section .fixup, \"ax\"\n"     \
 
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                "3: li %[" STR(error) "], 1\n"  \
 
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                "   j 2b\n"                     \
 
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                ".previous\n"                   \
 
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                                                \
 
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                ".section\t__ex_table,\"a\"\n\t"\
 
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                STR(PTR) "\t1b, 3b\n\t"         \
 
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                ".previous\n"                   \
 
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                                                \
 
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                : [error] "=r" (error)          \
 
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                : [dst] "r" (dst), [src] "r" (src)\
 
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                : "memory"                      \
 
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        );                                      \
 
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} while (0)
 
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#define safe_load_code(dst, src, error) \
 
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        safe_load(STR(lw), src, dst, error)
 
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#define safe_store_code(src, dst, error) \
 
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        safe_store(STR(sw), src, dst, error)
 
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#define safe_load_stack(dst, src, error) \
 
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        safe_load(STR(PTR_L), src, dst, error)
 
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#define safe_store_stack(src, dst, error) \
 
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        safe_store(STR(PTR_S), src, dst, error)
 
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#ifdef CONFIG_DYNAMIC_FTRACE
 
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static inline unsigned long ftrace_call_adjust(unsigned long addr)
 
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{
 
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        return addr;
 
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}
 
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struct dyn_arch_ftrace {
 
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};
 
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#endif /*  CONFIG_DYNAMIC_FTRACE */
 
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#endif /* __ASSEMBLY__ */
 
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#endif /* CONFIG_FUNCTION_TRACER */
 
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#endif /* _ASM_MIPS_FTRACE_H */