MiniOS-Pro/boot.S at main · KRO256/MiniOS-Pro · 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
.section .multiboot
.align 8
multiboot_header:
    .long 0xe85250d6
    .long 0
    .long multiboot_header_end - multiboot_header
    .long -(0xe85250d6 + 0 + (multiboot_header_end - multiboot_header))

    .align 8
    .short 5
    .short 0
    .long 20
    .long 1024
    .long 768
    .long 32
    .long 0

    .align 8
    .short 0
    .short 0
    .long 8
multiboot_header_end:

.section .text
.global _start
_start:
    cli
    mov $stack_top, %esp

    call idt_load
    call pic_init
    sti

    push %ebx
    call kmain
loop:
    hlt
    jmp loop

.global irq12_handler_stub
irq12_handler_stub:
    pusha
    push %ds
    push %es
    push %fs
    push %gs

    mov $0x10, %ax
    mov %ax, %ds
    mov %ax, %es
    mov %ax, %fs
    mov %ax, %gs

    push %esp
    call mouse_irq_handler
    add $4, %esp

    pop %gs
    pop %fs
    pop %es
    pop %ds
    popa

    movb $0x20, %al
    outb %al, $0x20

    iret

.section .bootstrap_stack, "aw", @nobits
.align 16
stack_bottom:
    .skip 16384
stack_top: