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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/* profile.h
Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved.
Permission to use, copy, modify, and distribute this software
is freely granted, provided that this notice is preserved. */
#ifndef __XSCALE_PROFILE_H__
#define __XSCALE_PROFILE_H__
/* FIXME:
We need to create a string version of the CPP predefined
__USER_LABEL_PREFIX__ macro. Ideally we would like to
so do something like:
#if __USER_LABEL_PREFIX__ == _
but this fails for arm-elf targets because although
__USER_LABEL__PREFIX__ is defined, it is not defined to
a specific value (even 0) and so the above test fails
with:
operator '==' has no left operand
Instead we have to test the CPP predefined __ELF__ and
rely upon the *assumption* that ELF targets will not use
an underscore prefix and that COFF targets will. */
#ifdef __ELF__
#define FOO ""
#else
#define FOO "_"
#endif
#define _MCOUNT_DECL(frompc, selfpc) \
void __attribute__ ((no_instrument_function)) \
mcount_internal (frompc, selfpc)
/* mcount_internal expects two arguments
r0 frompc (return address for function that call function that calls mcount)
r1 selfpc (return address for function that called mcount)
The frompc is extracted from the stack frames. If the code does not
generate stack frames, then mcount cannot extract this
information. Thus, the -fomit-frame-pointer optimization cannot be
used if a call graph information is required.
Due to optimizations mcount doesn't set up a new fp. mcount has the fp
of the calling function.
r0 frompc is from the current frame
r1 selfpc can be obtained directly from lr. */
#ifdef __thumb__
#define MCOUNT \
void __attribute__ ((naked)) \
__attribute__ ((no_instrument_function)) \
mcount (void) \
{ \
__asm__("push {r0, r1, r2, r3, lr};" \
"add r0, r7, #0;" \
"beq 1f;" \
"sub r0, r0, #4;" \
"ldr r0, [r0];" \
"1: mov r1, lr;" \
"bl " FOO "mcount_internal ;" \
"pop {r0, r1, r2, r3, pc};" \
); \
}
#else
#define MCOUNT \
void __attribute__ ((naked)) \
__attribute__ ((no_instrument_function)) \
mcount (void) \
{ \
__asm__("stmdb sp!, {r0, r1, r2, r3, lr};" \
"movs r0, fp;" \
"ldrne r0, [r0, #-4];" \
"mov r1, lr;" \
"bl " FOO "mcount_internal ;" \
"ldmia sp!, {r0, r1, r2, r3, pc};" \
); \
}
#endif
#define FUNCTION_ALIGNMENT 2
#endif /* !__XSCALE_PROFILE_H__ */
|
