blob: 5eaa794f3fbc636831cc8a05d2ace53262a77a59 (
plain)
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
|
MBALIGN equ 1<<0 ; Align loaded modules on page boundries */
MBMEMINFO equ 1<<1 ; Provide memory map*/
MBFLAGS equ MBALIGN | MBMEMINFO ; Multiboot flag field*/
MAGIC equ 0x1BADB002 ;Lets bootloader find header*/
CHECKSUM equ -(MAGIC + MBFLAGS) ; Proves we are multiboot via checksum*/
section .multiboot
align 4
dd MAGIC
dd MBFLAGS
dd CHECKSUM
section .bss
align 16
stack_bottom:
resb 16384
stack_top:
section .text
global _start:function (_start.end - _start)
_start:
mov esp, stack_top
extern get_gdtr
call get_gdtr
extern gdtr
mov [gdtr], eax
cli
lgdt [gdtr]
call reloadSegments ; this motherfucker is what is causing so many issues
[bits 32]
extern kernel_main
call kernel_main
cli
.hang: hlt
jmp .hang
.end:
reloadSegments:
JMP 0x0008:.reload_CS ; should def define a CODESEG
.reload_CS:
MOV AX, 0x0010
MOV DS, AX
MOV ES, AX
MOV FS, AX
MOV GS, AX
MOV SS, AX
RET
|
