; Mark the program as a kernel to a multiboot bootloader.
section .multiboot
align 4
_mb_start:
        dd MBMAGIC                  ; Magic number
        dd MBARCH                   ; ia86 Architecture.
        dd (_mb_end - _mb_start)    ; Header Length
        dd -(MBMAGIC + MBARCH + (_mb_end - _mb_start))  ; Checksum?

        ; End Tag.
        dd 0, 0, 8
_mb_end: