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Date: Mon, 30 Nov 2009 18:02:57 +0530
From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, "Frank Ch. Eigler" <fche@redhat.com>,
       utrace-devel <utrace-devel@redhat.com>,
       Roland McGrath <roland@redhat.com>, Jim Keniston <jkenisto@us.ibm.com>,
       Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Subject: Re: [RFC] [PATCH] In-kernel gdbstub based on utrace Infrastructure.
Message-ID: <20091130123257.GB18879@linux.vnet.ibm.com>
Reply-To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
References: <20091130120345.GA18879@linux.vnet.ibm.com> <1259582952.20516.209.camel@laptop>
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* Peter Zijlstra <peterz@infradead.org> [2009-11-30 13:09:12]:

> On Mon, 2009-11-30 at 17:33 +0530, Srikar Dronamraju wrote:
> > This patch implements an in-kernel gdb stub.
> > It provides an interface between gdb and Linux Kernel by implementing
> > the remote serial protocol.  This gdbstub uses utrace infrastructure.
> > This patch provides register set access, signal mapping, process event
> > handling, input/output operations.
> > 
> > /proc/<pid>/gdb was chosen as file for gdb to interact with the
> > process through remote serial protocol. 
> > 
> > Hence users would have to use "target remote /proc/<pid>/gdb" command
> > on gdb prompt to start using this infrastructure.
> > 
> > For Breakpointing support, gdbstub needs User space breakpointing
> > layer and uprobes layer which will be posted later.
> 
> How does this compare to kgdb and related efforts?

This is a In-kernel gdbstub to debug user space programs. 
This stub doesnt help in debugging kernel.

Hence I am not sure how to compare kgdb gdbstub with this gdbstub.
Can you please provide more pointers on what you were referring to?

--
Thanks and Regards
Srikar
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