-
Notifications
You must be signed in to change notification settings - Fork 28
/
usdt_tracepoints_x86_64.s
123 lines (113 loc) · 2.53 KB
/
usdt_tracepoints_x86_64.s
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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
/*
* Copyright (c) 2012, Chris Andrews. All rights reserved.
*/
/*
* Stub functions containing DTrace tracepoints for probes and
* is-enabled probes. These functions are copied for each probe
* dynamically created.
*
*/
.text
.align 4, 0x90
.globl usdt_tracepoint_isenabled
.globl _usdt_tracepoint_isenabled
.globl usdt_tracepoint_probe
.globl _usdt_tracepoint_probe
.globl usdt_tracepoint_end
.globl _usdt_tracepoint_end
.globl usdt_probe_args
.globl _usdt_probe_args
usdt_tracepoint_isenabled:
_usdt_tracepoint_isenabled:
pushq %rbp
movq %rsp, %rbp
addq $1, %rax
xorq %rax, %rax
nop
nop
leave
ret
usdt_tracepoint_probe:
_usdt_tracepoint_probe:
nop
nop
nop
nop
nop
addq %r14,%rsp
popq %rbx
popq %r14
popq %r13
popq %r12
leave
usdt_tracepoint_end:
_usdt_tracepoint_end:
ret
/*
* Probe argument marshalling, x86_64 style
*
*/
usdt_probe_args:
_usdt_probe_args:
pushq %rbp
movq %rsp,%rbp
pushq %r12
pushq %r13
pushq %r14
pushq %rbx
movq %rdi,%r12
movq %rsi,%rbx
movq %rdx,%r11
movq $0,%r14
test %rbx,%rbx
je fire
movq (%r11),%rdi
dec %rbx
test %rbx,%rbx
je fire
addq $8,%r11
movq (%r11),%rsi
dec %rbx
test %rbx,%rbx
je fire
addq $8,%r11
movq (%r11),%rdx
dec %rbx
test %rbx,%rbx
je fire
addq $8,%r11
movq (%r11),%rcx
dec %rbx
test %rbx,%rbx
je fire
addq $8,%r11
movq (%r11),%r8
dec %rbx
test %rbx,%rbx
je fire
addq $8,%r11
movq (%r11),%r9
movq %rbx,%r13
morestack:
dec %rbx
test %rbx,%rbx
je args
subq $16,%rsp
addq $16,%r14
dec %rbx
test %rbx,%rbx
je args
jmp morestack
args:
movq %r13,%rbx
movq $0,%r13
moreargs:
dec %rbx
test %rbx,%rbx
je fire
addq $8,%r11
movq (%r11),%rax
movq %rax,(%rsp,%r13)
addq $8,%r13
jmp moreargs
fire: jmp *%r12