xv6 setup instructions on andromeda
https://www.ics.uci.edu/~aburtsev/238P/hw/xv6-setup.html

gdb x command
http://visualgdb.com/gdbreference/commands/x

gdbinit
https:raw.githubusercontent.com/gdbinit/Gdbinit/master/gdbinit

gdb cheat sheet
http://darkdust.net/files/GDB%20Cheat%20Sheet.pdf

Assembly Files: Difference between .a .s .asm
https://stackoverflow.com/questions/34098596/assembly-files-difference-between-a-s-asm

Symbols
https://ftp.gnu.org/old-gnu/Manuals/gas-2.9.1/html_chapter/as_5.es.html