GDB-Tips

Useful gdb commands

• p or p/x (for hex) - Print an expression
• x or x/32wx (for 32 Hex words) - Show memory at location
• break - set a breakpoint (include a * to start raw memory addresses)
• continue - start execution after breakpoint
• ni/si - execute the next instruction - skip calls or don't
• display - like x, but reprints the output prior to each prompt
• info reg - information about registers
• info frame - info about the current Stack frame (ebp-esp)
• bt - backtrace
• help

Breakpoints

• Breakpoint for each call:
• break *0x<address of call1>
• break *0x<address of call2>
• etc..

Display Settings

• DISPLAY SETTINGS/Basic
• display/i $pc
• display/x $edx
• display/x $ecx
• display/x $ebx
• display/x $eax
• display/32wx $ebp-92
• display/32xw $esp