KGDB(7) BSD Reference Manual KGDB(7)
kgdb - remote kernel debugging with gdb
Should a programmer be dissatisfied with the OpenBSD kernel's internal debugger ddb(4), and have appropriate hardware available, a kernel with option KGDB may be built to effect remote debugging with gdb(1) instead. To prepare for debugging over serial line one would: • Obtain a second system and a crossover serial cable. • Connect the systems and test the cable. • Build a kernel with option KGDB and makeoptions DEBUG="-g". • Copy the resultant bsd.gdb to the control system, and boot the corresponding bsd on the target system. • On the control system, run gdb on the kernel just copied. • Issue the command "target remote /dev/<serial port>" within gdb. The target system should enter kgdb at this point. • Debug as normal and detach when done, the target should resume normal operation.
gdb(1), ddb(4), options(4) gdb info documents and online documentation.
The remote connection will introduce certain latencies a local debugger would not see. Not available on all architectures. MirOS BSD #10-current August 23, 2001 1
Generated on 2013-10-31 22:57:03 by $MirOS: src/scripts/roff2htm,v 1.77 2013/01/01 20:49:09 tg Exp $
These manual pages and other documentation are copyrighted by their respective writers;
their source is available at our CVSweb,
AnonCVS, and other mirrors. The rest is Copyright © 2002‒2013 The MirOS Project, Germany.
This product includes material provided by Thorsten Glaser.
This manual page’s HTML representation is supposed to be valid XHTML/1.1; if not, please send a bug report – diffs preferred.