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Re: Boot time attach

To: kgdb@xxxxxxxxxxx
Subject: Re: Boot time attach
From: sfoehner@xxxxxxxxxxxxxxxxxxx (Scott Foehner)
Date: Fri, 7 Apr 2000 15:15:18 -0700 (PDT)
In-reply-to: Tim Gardner <timg@xxxxxxx> "Boot time attach" (Apr 7, 3:07pm)
References: <Pine.LNX.3.96.1000407150155.23599A-100000@xxxxxxxxxxxxx>
Sender: owner-kgdb@xxxxxxxxxxx
Tim,

Are you asking the gdb command to necessary to connect across a serial
line?  If so, the answer is "target".  You are right in that I only documented
the kernel side of things, and not what needed to be done on gdb.  I will add
that to the FAQ.  Are you using a 2.2 series kernel, or 2.3?  I believe the
2.3 patch has some documentation of this nature.

I have this in my .gdbinit:
define rmt
set remotebaud 38400
target remote /dev/ttyd2
end

Basically, you need to do the "set remotebaud <your baud rate>", and then
"target remote <the local serial port name>".

Let me know if you still have problems.

Scott

On Apr 7,  3:07pm, Tim Gardner wrote:
> Subject: Boot time attach
> What's the secret to attaching at boot time? I'm using ddd as the gdb
> frontend. I've set the baud rate, the serial device, etc. When I set
> 'Debugging of remote protocol' I can see serial traffic with
> acknowledgements. So, I think I have the physical stuff working. It must
> be obvious by now that I'm not (yet) a gdb expert. I've tried run, attach,
> etc. No joy. Any help would be appreciated. Maybe this is something that
> should be added to the FAQ. I see from the April00 archive that this is
> not the first time this question has been asked.

-- 
Scott Foehner                   SGI
sfoehner@xxxxxxxxxxxx           Computer Systems Business Unit
650-933-3473                    Core OS

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