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gdb <program_path>
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Load program into gdb
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gdb <program_path> <core_path>
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Load program and core dump into gdb
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break
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Set break point at the current location
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break if <condition>
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Set break point here that triggers if certain condition is met
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break <code_location>
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Set break point at given code location
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break <code_location> if <condition>
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Set break point at given code location that triggers if given condition is met
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hbreak
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works exactly like break but it is hardware assisted breakpoints
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info breakpoints
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List all breakpoints and their associated num
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clear
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Delete all break points
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delete <breakpoint_num>
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Delete breakpoint given its number
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enable <breakpoint_num>
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Enable breakpoint given its number
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disable <breakpoint_num>
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Disable breakpoint given its number
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function_name
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self-explanatory
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*function_name + offset
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move offset bytes from function_name
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*math_expr
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pointer evaluated from the math expression
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run
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Run the loaded program
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run <arguments>
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Run loaded program with given arguments
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attach <pid>
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Attach debugger to given process
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next
|
Next line of source code
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step
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Same as next but will dive into calls
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nexti
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Next assembly instruction
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stepi
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same as nexti but will dive into calls
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finish
|
Continue till first ret instruction
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continue
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Continue till next breakpoint
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backtrace
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Print current backtrace
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disassemble <function_name>
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Disassemble given function
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print/<format> <expression>
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Evaluate expression and print it in given format
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display/<format> <expression>
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Same as print however it keeps executing after each step instruction
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info display
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List all auto-display expressions and their numbers
|
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enable display <num>
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Enable display given its number
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disable display <num>
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Disable display given its number
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x/nuf <address>
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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). |
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a
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Pointer
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c
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Character
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d
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Signed integer
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f
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Floating point number
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i
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instruction
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o
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octal
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s
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C-type strings
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t
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Binary
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u
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Unsigned integer
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x
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Hexadecimal
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info sharedlibrary
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List loaded shared libraries
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info proc mappings
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list of mapped memory regions.
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Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
