10. int 0x80 Definition
int 0x80 is the assembly language instruction that
is used to invoke system calls in Linux on x86
(i.e., Intel-compatible) processors.
http://www.linfo.org/int_0x80.html
13. The ELF format
● Executable and Linkable Format
● 4bytes magic number
● 32/64bit binary
● instruction set architecture
● interpreter for the program
https://en.wikipedia.org/wiki/Executable_and_Linkable_Format
http://www.skyfree.org/linux/references/ELF_Format.pdf