From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: about gdbserver-xen
Date: Mon, 06 Dec 2010 10:24:04 -0800
Message-ID: <4CFD2A44.5050907@goop.org>
References: <d8a15e.694c.12cba5f49ab.Coremail.topperxin@126.com>
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On 12/05/2010 10:29 PM, topperxin wrote:
> hi all
> Anybody who have ever use gdbserver-xen debug the domU kernel?
>
> from the guide of the gdbserver-xen, the domU must start at first,
> then at the dom0 we can do just like this:
> gdbserver-xen 127.0.0.1:9999 $dom_id
>
> and then also at dom0:
>
> gdb vmlinux
>
> gdb> target romote 127.0.0.1:9999
>
> that's ok.
>
> my question is when I do as above , my domU will crash. another is
> since the domU must start at first, if I want to debug the start stage
> of the domU kernel , what should I do? who can give me some advice ,
> thank you very much.


Firstly, "gdbsx" is the preferred command for debugging a domain these
days ("gdbsx -a <domid> <32|64> <port>").

Secondly, you can start your domain paused ("xl create -p"), attach
gdbsx and gdb, set any breakpoints, etc, then start the domain off.

J