GCC-Inline-Assembly-HOWTO

http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html#s2

GDB and assembly
https://forum.eviloctal.com/thread-21546-1-5.html

RESOURCES:
http://asm.sourceforge.net/resources.html

SIMPLE TUTORIAL:
http://www.xs4all.nl/~smit/asm01001.htm