Websites:
    OSDev Wiki - https://wiki.osdev.org/
    bona fide os developer - http://osdever.net/
    LittleOSBook - https://littleosbook.github.io/
    http://www.brokenthorn.com/Resources/OSDevIndex.html

References:
    NASM quick reference - https://www.posix.nl/linuxassembly/nasmdochtml/nasmdoca.html
    ELF Reference - https://flint.cs.yale.edu/cs422/doc/ELF_Format.pdf
    Anatomy of a program in memory - https://manybutfinite.com/post/anatomy-of-a-program-in-memory/
    Linux Buddy System Paging - https://lwn.net/Articles/253361/