aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/include/asm/ftrace.h
blob: dde1296b8b41a903dd2707f0d9465162efd36fbc (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
#ifndef _ASM_POWERPC_FTRACE
#define _ASM_POWERPC_FTRACE

#ifdef CONFIG_FUNCTION_TRACER
#define MCOUNT_ADDR		((long)(_mcount))
#define MCOUNT_INSN_SIZE	4 /* sizeof mcount call */

#ifdef __ASSEMBLY__

/* Based off of objdump optput from glibc */

#define MCOUNT_SAVE_FRAME			\
	stwu	r1,-48(r1);			\
	stw	r3, 12(r1);			\
	stw	r4, 16(r1);			\
	stw	r5, 20(r1);			\
	stw	r6, 24(r1);			\
	mflr	r3;				\
	lwz	r4, 52(r1);			\
	mfcr	r5;				\
	stw	r7, 28(r1);			\
	stw	r8, 32(r1);			\
	stw	r9, 36(r1);			\
	stw	r10,40(r1);			\
	stw	r3, 44(r1);			\
	stw	r5, 8(r1)

#define MCOUNT_RESTORE_FRAME			\
	lwz	r6, 8(r1);			\
	lwz	r0, 44(r1);			\
	lwz	r3, 12(r1);			\
	mtctr	r0;				\
	lwz	r4, 16(r1);			\
	mtcr	r6;				\
	lwz	r5, 20(r1);			\
	lwz	r6, 24(r1);			\
	lwz	r0, 52(r1);			\
	lwz	r7, 28(r1);			\
	lwz	r8, 32(r1);			\
	mtlr	r0;				\
	lwz	r9, 36(r1);			\
	lwz	r10,40(r1);			\
	addi	r1, r1, 48

#else /* !__ASSEMBLY__ */
extern void _mcount(void);

#ifdef CONFIG_DYNAMIC_FTRACE
static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
       /* reloction of mcount call site is the same as the address */
       return addr;
}

struct dyn_arch_ftrace {
	struct module *mod;
};
#endif /*  CONFIG_DYNAMIC_FTRACE */
#endif /* __ASSEMBLY__ */

#endif

#endif /* _ASM_POWERPC_FTRACE */