From owner-freebsd-hackers@FreeBSD.ORG  Mon Feb 27 18:31:50 2006
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 4711616A420
	for <freebsd-hackers@freebsd.org>; Mon, 27 Feb 2006 18:31:50 +0000 (GMT)
	(envelope-from jmg@hydrogen.funkthat.com)
Received: from hydrogen.funkthat.com (gate.funkthat.com [69.17.45.168])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 99DF543D58
	for <freebsd-hackers@freebsd.org>; Mon, 27 Feb 2006 18:31:44 +0000 (GMT)
	(envelope-from jmg@hydrogen.funkthat.com)
Received: from hydrogen.funkthat.com (iqc2mdz5jbblsey9@localhost.funkthat.com
	[127.0.0.1])
	by hydrogen.funkthat.com (8.13.3/8.13.3) with ESMTP id k1RIVhTA037294; 
	Mon, 27 Feb 2006 10:31:43 -0800 (PST)
	(envelope-from jmg@hydrogen.funkthat.com)
Received: (from jmg@localhost)
	by hydrogen.funkthat.com (8.13.3/8.13.3/Submit) id k1RIVg2I037293;
	Mon, 27 Feb 2006 10:31:42 -0800 (PST) (envelope-from jmg)
Date: Mon, 27 Feb 2006 10:31:42 -0800
From: John-Mark Gurney <gurney_j@resnet.uoregon.edu>
To: Tanmay <tanmayinamdar@gmail.com>
Message-ID: <20060227183142.GJ840@funkthat.com>
Mail-Followup-To: Tanmay <tanmayinamdar@gmail.com>, freebsd-hackers@freebsd.org
References: <cdc1d1310602270026o6b17101et14ddf301269edc37@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <cdc1d1310602270026o6b17101et14ddf301269edc37@mail.gmail.com>
User-Agent: Mutt/1.4.2.1i
X-Operating-System: FreeBSD 5.4-RELEASE-p6 i386
X-PGP-Fingerprint: B7 EC EF F8 AE ED A7 31  96 7A 22 B3 D8 56 36 F4
X-Files: The truth is out there
X-URL: http://resnet.uoregon.edu/~gurney_j/
X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html
Cc: freebsd-hackers@freebsd.org
Subject: Re: Accessing address space of a process through kld!!
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: John-Mark Gurney <gurney_j@resnet.uoregon.edu>
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 27 Feb 2006 18:31:50 -0000

Tanmay wrote this message on Mon, Feb 27, 2006 at 13:56 +0530:
> How do I access the address space ie text,data and stack of a (user
> level)process whose pid I know from my kld. for eg: Suppose 'vi' is running
> and I want to access its address space through my kld, then how do I do it?

You look up the process with pfind(9), and then you can use uio(9) to
transfer data into kernel space...  Don't forget to PROC_UNLOCK the
struct once you are done referencing it.

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."