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gdt_start:
gdt_null: ;null descriptor (2 x 4 bytes)
dd 0x0
dd 0x0
gdt_code:
; flags:
; present: 1 / privilege: 00 / type: 1
; code: 1 / conforming: 0 / readable: 1 / accessed: 0
; granularity: 1 / 32-bit default: 1 / 64-bit seg: 0 / AVL: 0
dw 0xffff ;limit
dw 0x0 ;base
db 0x0 ;base
db 10011010b ;flags
db 11001111b ;flags & seg.limit
db 0x0 ;base
gdt_data:
; flags:
; code: 0 / expand down: 0 / writable: 1 / accessed: 0
dw 0xffff
dw 0x0
db 0x0
db 10010010b
db 11001111b
db 0x0
gdt_end:
gdt_descriptor:
dw gdt_end-gdt_start-1
dd gdt_start
CODE_SEG equ gdt_code - gdt_start
DATA_SEG equ gdt_data - gdt_start
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