gdb

Commands

• finish step out of the function
• disas disassemble (default is current function)
• where / frame print the stack frame
• si step in instruction level
• watch: Triggers when the variable’s value is changed (written to).
• rwatch: Triggers when the variable’s value is read.
• awatch: Triggers on both read and write access to the variable.

Break

• b *0x400f30 set breakpoint at memory
• Conditional breakpoints:
  • break [location] if [condition]

Format Letters

• Examine memory: x/FMT ADDRESS.
  • Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal), t(binary), f(float), a(address), i(instruction), c(char), s(string)

Keymap

• <C-x-a>: TUI mode
• <C-x-2>: multiple windows

Layout

• layout asm
• tui reg float

Links

• DWARF