diff options
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 00000000000..9e8bc29b8b1 --- /dev/null +++ b/arch/x86/include/asm/ftrace.h @@ -0,0 +1,24 @@ +#ifndef _ASM_X86_FTRACE_H +#define _ASM_X86_FTRACE_H + +#ifdef CONFIG_FUNCTION_TRACER +#define MCOUNT_ADDR ((long)(mcount)) +#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ + +#ifndef __ASSEMBLY__ +extern void mcount(void); + +static inline unsigned long ftrace_call_adjust(unsigned long addr) +{ + /* + * call mcount is "e8 <4 byte offset>" + * The addr points to the 4 byte offset and the caller of this + * function wants the pointer to e8. Simply subtract one. + */ + return addr - 1; +} +#endif + +#endif /* CONFIG_FUNCTION_TRACER */ + +#endif /* _ASM_X86_FTRACE_H */ |