From owner-freebsd-hackers  Thu Apr 20 15:30:53 1995
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From: Bill Fenner <fenner@parc.xerox.com>
To: freebsd-hackers@FreeBSD.org
Subject: How do I set a kernel variable?
Message-Id: <95Apr20.152730pdt.49864@crevenia.parc.xerox.com>
Date: Thu, 20 Apr 1995 15:27:19 PDT
Sender: hackers-owner@FreeBSD.org
Precedence: bulk

Under Sunos, I do

adb -w -k /vmunix /dev/mem
mrtdebug/W1

Under FreeBSD, I do

gdb -k /kernel /dev/mem
kgdb> set mrtdebug = 1
kvm_write:write failed
kgdb> p mrtdebug
$1 = 0

Do I have to set up a sysctl interface for my debugging flags?...

  Bill