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| author | Paul Mundt <lethal@linux-sh.org> | 2009-12-21 11:59:55 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-12-21 11:59:55 +0900 |
| commit | 76e7461a21dfe13565b2a323b53c8cc963541126 (patch) | |
| tree | 8e399c71b38bb80c00d8a82310021b55ab6e8e33 /arch/mips/include/asm/ftrace.h | |
| parent | d0b873fc73b793277c8a0824ce986b5bfeaef157 (diff) | |
| parent | dd59f6c76b265ed2ff18b497d6105a9511b1feb1 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/mips/include/asm/ftrace.h')
| -rw-r--r-- | arch/mips/include/asm/ftrace.h | 91 |
1 files changed, 90 insertions, 1 deletions
diff --git a/arch/mips/include/asm/ftrace.h b/arch/mips/include/asm/ftrace.h index 40a8c178f10..3986cd8704f 100644 --- a/arch/mips/include/asm/ftrace.h +++ b/arch/mips/include/asm/ftrace.h @@ -1 +1,90 @@ -/* empty */ +/* + * 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 <wuzj@lemote.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 " %[" STR(dst) "], 0(%[" STR(src) "])\n"\ + " li %[" STR(error) "], 0\n" \ + "2:\n" \ + \ + ".section .fixup, \"ax\"\n" \ + "3: li %[" STR(error) "], 1\n" \ + " j 2b\n" \ + ".previous\n" \ + \ + ".section\t__ex_table,\"a\"\n\t" \ + STR(PTR) "\t1b, 3b\n\t" \ + ".previous\n" \ + \ + : [dst] "=&r" (dst), [error] "=r" (error)\ + : [src] "r" (src) \ + : "memory" \ + ); \ +} while (0) + +#define safe_store(store, src, dst, error) \ +do { \ + asm volatile ( \ + "1: " store " %[" STR(src) "], 0(%[" STR(dst) "])\n"\ + " li %[" STR(error) "], 0\n" \ + "2:\n" \ + \ + ".section .fixup, \"ax\"\n" \ + "3: li %[" STR(error) "], 1\n" \ + " j 2b\n" \ + ".previous\n" \ + \ + ".section\t__ex_table,\"a\"\n\t"\ + STR(PTR) "\t1b, 3b\n\t" \ + ".previous\n" \ + \ + : [error] "=r" (error) \ + : [dst] "r" (dst), [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 */ |