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| help command |
Get help on a certain command |
| apropos keyword |
Search help for a particular keyword |
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| gdb [-tui] [-c core] [exename] |
(Unix Command) Start gdb on an executable or standalone; specify "-tui" to start the TUI GUI; specify "-c" with a corefile name to see where a crash occurred |
| run [arg1] [arg2] [...] |
Run the currently loaded program with the given command line arguments |
| quit |
Exit the debugger |
| file exename |
Load an executable file by name |
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| break location |
Set a breakpoint at a location, line number, or file (e.g. "main", "5", or "hello.c:23") |
| watch expression |
Break when a variable is written to |
| rwatch expression |
Break when a variable is read from |
| awatch expression |
Break when a variable is written to or read from |
| info break |
Display breakpoint and watchpoint information and numbers |
| info watch |
Same as info break |
| clear location |
Clear a breakpoint from a location |
| delete num |
Delete a breakpoint or watchpoint by number |
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| next |
Run to the next line of this function |
| step |
Step into the function on this line, if possible |
| stepi |
Step a single assembly instruction |
| continue |
Keep running from here |
| CTRL-C |
Stop running, wherever you are |
| finish |
Run until the end of the current function |
| advance location |
Advance to a location, line number, or file (e.g. "somefunction", "5", or "hello.c:23") |
| jump location |
Just like continue, except jump to a particular location first. |
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| display expression |
Display the value of a variable or expression every step of the program—the expression must make sense in the current scope |
| info display |
Show a list of expressions currently being displayed and their numbers |
| undisplay num |
Stop showing an expression identified by its number (see info display) |
| print expression |
Print the value of a variable or expression |
| printf formatstr expressionlist |
Do some formatted output with printf() e.g. printf "i = %d, p = %s
", i, p |
| set variable expression |
Set a variable to value, e.g. set variable x=20 |
| set (expression) |
Works like set variable |
|
| info win |
Shows current window info |
| focus winname |
Set focus to a particular window bby name ("SRC", "CMD", "ASM", or "REG") or by position ("next" or "prev") |
| fs |
Alias for focus |
| layout type |
Set the window layout ("src", "asm", "split", or "reg") |
| tui reg type |
Set the register window layout ("general", "float", "system", or "next") |
| winheight val |
Set the window height (either an absolute value, or a relative value prefaced with "+" or "-") |
| wh |
Alias for winheight |
| set disassembly-flavor flavor |
Set the look-and-feel of the disassembly. On Intel machines, valid flavors are intel and att |
|
| RETURN |
Hit RETURN to repeat the last command |
| backtrace |
Show the current stack |
| bt |
Alias for backtrace |
| attach pid |
Attach to an already-running process by its PID |
| info registers |
Dump integer registers to screen |
| info all-registers |
Dump all registers to screen |