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author | Ingo Molnar <mingo@elte.hu> | 2008-10-27 05:50:54 -0400 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-27 05:50:54 -0400 |
commit | 4944dd62de21230af039eda7cd218e9a09021d11 (patch) | |
tree | bac70f7bab8506c7e1b0408bacbdb0b1d77262e9 /arch/x86/include/asm/ftrace.h | |
parent | f17845e5d97ead8fbdadfd40039e058ec7cf4a42 (diff) | |
parent | 0173a3265b228da319ceb9c1ec6a5682fd1b2d92 (diff) |
Merge commit 'v2.6.28-rc2' into tracing/urgent
Diffstat (limited to 'arch/x86/include/asm/ftrace.h')
-rw-r--r-- | arch/x86/include/asm/ftrace.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h new file mode 100644 index 000000000000..9e8bc29b8b17 --- /dev/null +++ b/arch/x86/include/asm/ftrace.h | |||
@@ -0,0 +1,24 @@ | |||
1 | #ifndef _ASM_X86_FTRACE_H | ||
2 | #define _ASM_X86_FTRACE_H | ||
3 | |||
4 | #ifdef CONFIG_FUNCTION_TRACER | ||
5 | #define MCOUNT_ADDR ((long)(mcount)) | ||
6 | #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ | ||
7 | |||
8 | #ifndef __ASSEMBLY__ | ||
9 | extern void mcount(void); | ||
10 | |||
11 | static inline unsigned long ftrace_call_adjust(unsigned long addr) | ||
12 | { | ||
13 | /* | ||
14 | * call mcount is "e8 <4 byte offset>" | ||
15 | * The addr points to the 4 byte offset and the caller of this | ||
16 | * function wants the pointer to e8. Simply subtract one. | ||
17 | */ | ||
18 | return addr - 1; | ||
19 | } | ||
20 | #endif | ||
21 | |||
22 | #endif /* CONFIG_FUNCTION_TRACER */ | ||
23 | |||
24 | #endif /* _ASM_X86_FTRACE_H */ | ||