summaryrefslogtreecommitdiff
path: root/include/asm-x86/ftrace.h
blob: 1bb6f9bbe1ab99319d4df113086e46ec17e9c7e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
#ifndef ASM_X86__FTRACE_H
#define ASM_X86__FTRACE_H

#ifdef CONFIG_FTRACE
#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_FTRACE */

#endif /* ASM_X86__FTRACE_H */