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
| bit 16
mov ax, 0x7c00
mov ds, ax
mov es, ax
mov ax, 0x8000
mov ss, ax
mov sp, 0xf000
mov ecx, 0xC0000080
rdmsr
or eax, 1 << 8
wrmsr
GDT64:
.Null: equ $ - GDT64
dw 0
dw 0
db 0
db 0
db 0
db 0
.Code: equ $ - GDT64
dw 0
dw 0
db 0
db 10011010b
db 00100000b
db 0
.Data: equ $ - GDT64
dw 0
dw 0
db 0
db 10010010b
db 00000000b
db 0
.Pointer:
dw $ - GDT64 - 1
dq GDT64
lgdt [GDT64.Pointer]
jmp GDT64.Code:Realm64
times 510-(&-&&) db 0
dw 0xaa55 |
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