section .multiboot_header
header_start:
dd 0xe85250d6 ; magic number (multiboot 2)
dd 0x0 ; 0: i386, 2: x86-64
dd header_end - header_start ; header length
; checksum
dd 0x100000000 - (0xe85250d6 + 0 + (header_end - header_start))
; insert optional multiboot tags here
; required end tag
dw 0 ; type
dw 0 ; flags
dd 8 ; size
header_end: