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2 Using kgdb, kdb and the kernel debugger internals
33 Two machines are required for using kgdb. One of these machines is a
71 If the architecture that you are using supports the kernel option
75 supports it for the architecture you are using, you can use hardware
106 ``CONFIG_KGDB_SERIAL_CONSOLE`` interface if you plan on using kdb on a
129 using kdb and kgdb as well as providing some examples of the
142 console as your primary console as well as using it to perform kernel
174 depending on if you are using kdb and/or kgdb, in one of the following
176 optional configurations together. Using kms + only gdb is generally not
179 Using loadable module or built-in
195 first is for an x86 target using the first serial port. The second
196 example is for the ARM Versatile AB using the second serial port.
225 depending on if you are using kdb and/or kgdb, in one of the following
265 When using kgdboc with no debugger proxy, you can end up connecting the
283 to work using the boot console until it can transition to the regular
323 Kgdb supports using the gdb serial protocol to send console messages to
378 If the architecture that you are using enable KASLR by default,
384 Using kdb
392 1. Configure kgdboc at boot using kernel parameters::
398 Configure kgdboc after the kernel has booted; assuming you are using
405 manually; all involve using the :kbd:`SysRq-G`, which means you must have
412 - Example using minicom 2.2
435 ``bt`` Get a backtrace of the current process using dump_stack()
440 4. When you are done using kdb you need to consider rebooting the system
441 or using the ``go`` command to resuming normal kernel execution. If you
445 consideration when using the kernel debugger.
447 Quick start for kdb using a keyboard connected console
452 1. Configure kgdboc at boot using kernel parameters::
464 manually; all involve using the :kbd:`SysRq-G`, which means you must have
471 - Example using a laptop keyboard:
485 - Example using a PS/2 101-key keyboard
498 Using kgdb / gdb
521 Configure kgdboc at boot using kernel parameters::
535 using kgdbwait as a boot argument, via a :kbd:`SysRq-G`, or running the
543 - Example using minicom 2.2
558 Example (using a directly connected port)::
643 It is possible to run a limited set of kdb commands from gdb, using the
646 debugger. You should be using gdb for breakpoints and run control
706 using the debugger
848 When using kgdboc with a UART, the UART driver must implement two
885 switch to a text context when you are using ``kgdboc=kms,kbd``, provided