.section .multiboot_header, "a" .align 4 header_start: # magic number .long 0xe85250d6 # multiboot2 # architecture .long 0 # protected mode i386 # header length .long (header_end - header_start) # checksum .long 0x100000000 - (0xe85250d6 + 0 + (header_end - header_start)) # end tag .word 0 .word 0 .long 8 header_end: