Binary Exploitation Cheatsheet

README.md

Examinining Memory

https://ftp.gnu.org/old-gnu/Manuals/gdb/html_node/gdb_55.html

x/nfu addr

• n, the repeat count. Decimal integer, default to 1, counted by units u.

• f, the display format. Default changes each time using x or print command.

  • s null-terminated string

  • i machine instruction

  • x hexadecimal (initial default)

• u, the unit size

  • b Bytes.

  • h Halfwords (two bytes).

  • w Words (four bytes). This is the initial default.

  • g Giant words (eight bytes).

Memory layout

It contained in a /proc/<pid>/maps file. From gdb we can do:

gdb$ info proc mappings
gdb$ maintenance info sections
gdb$ files

Dynamic library

$ ldd <binary>