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Date:      Wed, 09 Jun 1999 14:35:48 -0400
From:      "David E. Cross" <crossd@cs.rpi.edu>
To:        The Hermit Hacker <scrappy@hub.org>
Cc:        "David E. Cross" <crossd@cs.rpi.edu>, freebsd-current@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG, crossd@cs.rpi.edu
Subject:   Re: MMAP() in STABLE/CURRENT ... 
Message-ID:  <199906091835.OAA35583@cs.rpi.edu>
In-Reply-To: Message from The Hermit Hacker <scrappy@hub.org>  of "Wed, 09 Jun 1999 15:11:43 -0300." <Pine.BSF.4.05.9906091509450.49155-100000@thelab.hub.org> 

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by "break" I mean a serial break condition.  Take the Tx line out of your 
box and bring it negative 3-5 volts for a short time, that will be a break.

Seriously, the break will need to be sent from the piece of equipment that is
connected to the other end of the serial line.  It isn't a telnet issue at all.
There should be a way to drop into a command mode on the livingston (I have
never used one, so I don't know how), and send a RS-232 break to the remote
side.  After that go back to terminal mode, you should be at a DDB prompt.
"trace" should give you what we want to see.  Also, if you can configure 
'dumpon' and 'savecore' (man savecore, see 'dumpon' in /etc/rc.conf), at that
prompt enter 'panic' to get a core dump of your system... you may have to 
enter 'panic' more than once.

I have a spare machine here.. I will try my program on it shortly..  I don't 
feel like crashing my home machine again... it is in X so DDB doesn't work,
and I need to hard down it with the reset button.  Plus it is a good 15 minute
walk to just get there.

--
David Cross                               | email: crossd@cs.rpi.edu 
Systems Administrator/Research Programmer | Web: http://www.cs.rpi.edu/~crossd 
Rensselaer Polytechnic Institute,         | Ph: 518.276.2860            
Department of Computer Science            | Fax: 518.276.4033
I speak only for myself.                  | WinNT:Linux::Linux:FreeBSD
--
David Cross                               | email: crossd@cs.rpi.edu 
Systems Administrator/Research Programmer | Web: http://www.cs.rpi.edu/~crossd 
Rensselaer Polytechnic Institute,         | Ph: 518.276.2860            
Department of Computer Science            | Fax: 518.276.4033
I speak only for myself.                  | WinNT:Linux::Linux:FreeBSD


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