Gitiles
Code Review Sign In
review.evervolv.com / android_kernel_oneplus_msm8996 / 4944dd62de21230af039eda7cd218e9a09021d11 / . / arch / x86 / include / asm / ftrace.h
blob: 9e8bc29b8b17dd3739d7479af6920c3c627130cb [file] [log] [blame]
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700[diff] [blame]1#ifndef _ASM_X86_FTRACE_H
2#define _ASM_X86_FTRACE_H
Abhishek Sagar395a59d2008-06-21 23:47:27 +0530[diff] [blame]3
Ingo Molnar4944dd62008-10-27 10:50:54 +0100[diff] [blame^]4#ifdef CONFIG_FUNCTION_TRACER
Abhishek Sagar395a59d2008-06-21 23:47:27 +0530[diff] [blame]5#define MCOUNT_ADDR ((long)(mcount))
6#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
7
8#ifndef __ASSEMBLY__
9extern void mcount(void);
Steven Rostedt68bf21a2008-08-14 15:45:08 -0400[diff] [blame]10
11static 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}
Abhishek Sagar395a59d2008-06-21 23:47:27 +0530[diff] [blame]20#endif
21
Ingo Molnar4944dd62008-10-27 10:50:54 +0100[diff] [blame^]22#endif /* CONFIG_FUNCTION_TRACER */
Abhishek Sagar395a59d2008-06-21 23:47:27 +0530[diff] [blame]23
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700[diff] [blame]24#endif /* _ASM_X86_FTRACE_H */