TestOS/_irq.asm at master · AvihooI/TestOS · GitHub

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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
section .text

global _irq_0
global _irq_1
global _irq_2
global _irq_3
global _irq_4
global _irq_5
global _irq_6
global _irq_7
global _irq_8
global _irq_9
global _irq_10
global _irq_11
global _irq_12
global _irq_13
global _irq_14
global _irq_15

_irq_0:
    cli
    push byte 0
    push byte 32
    jmp _irq_common

_irq_1:
    cli
    push byte 0
    push byte 33
    jmp _irq_common

_irq_2:
    cli
    push byte 0
    push byte 34
    jmp _irq_common

_irq_3:
    cli
    push byte 0
    push byte 35
    jmp _irq_common

_irq_4:
    cli
    push byte 0
    push byte 36
    jmp _irq_common

_irq_5:
    cli
    push byte 0
    push byte 37
    jmp _irq_common

_irq_6:
    cli
    push byte 0
    push byte 38
    jmp _irq_common

_irq_7:
    cli
    push byte 0
    push byte 39
    jmp _irq_common

_irq_8:
    cli
    push byte 0
    push byte 40
    jmp _irq_common

_irq_9:
    cli
    push byte 0
    push byte 41
    jmp _irq_common

_irq_10:
    cli
    push byte 0
    push byte 42
    jmp _irq_common

_irq_11:
    cli
    push byte 0
    push byte 43
    jmp _irq_common

_irq_12:
    cli
    push byte 0
    push byte 44
    jmp _irq_common

_irq_13:
    cli
    push byte 0
    push byte 45
    jmp _irq_common

_irq_14:
    cli
    push byte 0
    push byte 46
    jmp _irq_common

_irq_15:
    cli
    push byte 0
    push byte 47
    jmp _irq_common

_irq_common:
    pusha
    push ds
    push es
    push fs
    push gs
    mov ax, 0x10 ;Load ring-0 DS selector
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    mov eax, esp ;Push the stack
    push eax
    extern irq_main_handler
    call irq_main_handler
    pop eax
    pop gs
    pop fs
    pop es
    pop ds
    popa
    add esp, 8 ;cleans the pushed error code and pushed isr number
    iret ;pops CS, EIP, EFLAGS, SS and ESP