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DragonFly users List (threaded) for 2005-06
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Re: Historical use of "traps"

From: "George Georgalis" <george@xxxxxxxxx>
Date: Sat, 11 Jun 2005 01:56:51 -0400

On Thu, Jun 09, 2005 at 05:44:36PM +0000, Oliver Fromme wrote:
>Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx> wrote:
> >    Actually what I really want is a PCI card that allows me to run GDB
> >    from another box without having to do any code interfacing at all.
>I was under the impression that the firewire console access
>offered something like that, i.e. reading and writing RAM
>locations directly from the IEEE1394 controller without any
>need for a driver.  At least the FreeBSD manpage sounds
>like that (but I've never used it, so I might misunderstand
>how it works).

Right. I saw Greg Lehey's "Debugging Kernel Problems" at the May BSDCan
2005, and he demonstrated the technique in FBSD. See page 44 of his

Debugging kernel problems: tutorial and slides. 

apparently the freebsd 6.0, gdb(4) has some specific instructions too.

[Anybody got a P.E.T. emulator and rat trap game?]

// George

George Georgalis, systems architect, administrator Linux BSD IXOYE
http://galis.org/george/ cell:646-331-2027 mailto:george@xxxxxxxxx

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