-
Notifications
You must be signed in to change notification settings - Fork 1
/
selfmod.c
76 lines (71 loc) · 1.07 KB
/
selfmod.c
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
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
int hello = 0;
void foo()
{
if (!hello) {
hello = 1;
printf("Hello\n");
}
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
__asm__("nop");
}
void bar()
{
printf("World\n");
exit(0);
}
/* Dummy so we can get end of bar */
void baz()
{
}
int main()
{
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
foo();
memcpy(foo, bar, baz-bar);
foo();
/* Should print "Hello\nWorld\n" */
return 1;
}