kgdb(1)

NAME

kgdb - kernel debugger

kgdb [-a | -f | -fullname] [-q | -quiet] [-v] [-d crashdir]
     [-c core | -n dumpnr | -r device] [kernel [core]]

The kgdb utility is a debugger based on gdb(1) that allows
debugging of kernel core files.
The options are as follows:
-a Increase the annotation level. An anno
tation level of: 1 features the historical -fullname op; tion of gdb(1).
This is useful when running kgdb in; Emacs. The -f or
-fullname options are supported for back; ward compatibility as well.
-q Suppress printing of the banner when the
debugger: starts. The -quiet form is supported for; compatibility as well.
-v Increase verbosity.
-d crashdir Use crashdir instead of the default,
/var/crash to: locate kernel core dump files in. The; name vmcore.
plus the dump number will be appended to; determine the
actual dump file name.
-c core Explicitly use core as the core dump
file.
-n dumpnr Use the kernel core dump file numbered
dumpnr for: debugging.
-r device Use device to connect kgdb to for a re
mote debugging: session.
The -c, -n, and -r options are mutually exclusive.
Optionally, the name of the kernel symbol file and the name
of the core dump file can be supplied on the command-line as positional
arguments. If no kernel symbol file name has been given, the symbol
file of the currently running kernel will be used. If no core dump file
has been specified through either of the options or the last command-line
argument, /dev/mem will be opened to allow debugging the currently
running kernel.