| H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_FTRACE_H |
| 2 | #define _ASM_X86_FTRACE_H |
| Abhishek Sagar | 395a59d | 2008-06-21 23:47:27 +0530 | [diff] [blame] | 3 | |
| 4 | #ifdef CONFIG_FTRACE |
| 5 | #define MCOUNT_ADDR ((long)(mcount)) |
| 6 | #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ |
| 7 | |
| 8 | #ifndef __ASSEMBLY__ |
| 9 | extern void mcount(void); |
| Steven Rostedt | 68bf21a | 2008-08-14 15:45:08 -0400 | [diff] [blame] | 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 | } |
| Abhishek Sagar | 395a59d | 2008-06-21 23:47:27 +0530 | [diff] [blame] | 20 | #endif |
| 21 | |
| 22 | #endif /* CONFIG_FTRACE */ |
| 23 | |
| H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 24 | #endif /* _ASM_X86_FTRACE_H */ |