Cheatography
https://cheatography.com
Basic way to start reverse engineering and exploitation
Run GDBgdb <program_path> | Load program into gdb | gdb <program_path> <core_path> | Load program and core dump into gdb |
Breakpointsbreak | Set break point at the current location | break if <condition> | Set break point here that triggers if certain condition is met | break <code_location> | Set break point at given code location | break <code_location> if <condition> | Set break point at given code location that triggers if given condition is met | hbreak | works exactly like break but it is hardware assisted breakpoints | info breakpoints | List all breakpoints and their associated num | clear | Delete all break points | delete <breakpoint_num> | Delete breakpoint given its number | enable <breakpoint_num> | Enable breakpoint given its number | disable <breakpoint_num> | Disable breakpoint given its number |
code_locationfunction_name | self-explanatory | *function_name + offset | move offset bytes from function_name | *math_expr | pointer evaluated from the math expression |
Steppingrun | Run the loaded program | run <arguments> | Run loaded program with given arguments | attach <pid> | Attach debugger to given process | next | Next line of source code | step | Same as next but will dive into calls | nexti | Next assembly instruction | stepi | same as nexti but will dive into calls | finish | Continue till first ret instruction | continue | Continue till next breakpoint |
| | Examining codebacktrace | Print current backtrace | disassemble <function_name> | Disassemble given function |
Memoryprint/<format> <expression> | Evaluate expression and print it in given format | display/<format> <expression> | Same as print however it keeps executing after each step instruction | info display | List all auto-display expressions and their numbers | enable display <num> | Enable display given its number | disable display <num> | Disable display given its number | x/nuf <address> | Examine memory.
n: How many units to print (default 1).
f: Format character (like "print").
u: Unit. Unit is one of:
b: Byte
h: Half-word (two bytes)
w: Word (four bytes)
g: Giant word (eight bytes). |
Formata | Pointer | c | Character | d | Signed integer | f | Floating point number | i | instruction | o | octal | s | C-type strings | t | Binary | u | Unsigned integer | x | Hexadecimal |
General informationinfo sharedlibrary | List loaded shared libraries | info proc mappings | list of mapped memory regions. |
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