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Thread-Topic: Remote kernel debugging using GDB
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From: "Leubner, Achim" <Achim_Leubner@adaptec.com>
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Subject: Remote kernel debugging using GDB
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Hello all,

=20

I want to do some remote kernel debugging using GDB on FreeBSD 5.3.=20

I connected host and target with a null-modem cable on COM1 and made a =
debug kernel with "options GDB", "options DDB", "options KDB" and =
"makeoptions  DEBUG=3D-g" and I set the port flags of sio0 to 0x80.

But if I start the debug kernel on the target machine with "boot -d" I =
always get the message "GDB: no debug ports present" and if I want to =
start GDB I get "The remote GDB backend could not be selected". In =
"debug.kdb.available" I only see the ddb and "sysctl -w =
debug.kdb.current=3Dgdb" fails.

Does anybody know what=B4s going wrong here? Any help is greatly =
appreciated.

=20

Thanks,

Achim Leubner

ICP vortex GmbH / Adaptec Inc.

Phone: +49-351-8718291

=20