forked from aquynh/iVM
-
Notifications
You must be signed in to change notification settings - Fork 0
/
test-i386-code16.S
79 lines (59 loc) · 1.29 KB
/
test-i386-code16.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
.code16
.globl code16_start
.globl code16_end
CS_SEG = 0xf
code16_start:
.globl code16_func1
/* basic test */
code16_func1 = . - code16_start
mov $1, %eax
data32 lret
/* test push/pop in 16 bit mode */
.globl code16_func2
code16_func2 = . - code16_start
xor %eax, %eax
mov $0x12345678, %ebx
movl %esp, %ecx
push %bx
subl %esp, %ecx
pop %ax
data32 lret
/* test various jmp opcodes */
.globl code16_func3
code16_func3 = . - code16_start
jmp 1f
nop
1:
mov $4, %eax
mov $0x12345678, %ebx
xor %bx, %bx
jz 2f
add $2, %ax
2:
call myfunc
lcall $CS_SEG, $(myfunc2 - code16_start)
ljmp $CS_SEG, $(myjmp1 - code16_start)
myjmp1_next:
cs lcall *myfunc2_addr - code16_start
cs ljmp *myjmp2_addr - code16_start
myjmp2_next:
data32 lret
myfunc2_addr:
.short myfunc2 - code16_start
.short CS_SEG
myjmp2_addr:
.short myjmp2 - code16_start
.short CS_SEG
myjmp1:
add $8, %ax
jmp myjmp1_next
myjmp2:
add $16, %ax
jmp myjmp2_next
myfunc:
add $1, %ax
ret
myfunc2:
add $4, %ax
lret
code16_end: