From owner-freebsd-hackers@FreeBSD.ORG  Sun Feb  6 06:16:43 2005
Return-Path: <owner-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 E0D8F16A4CE
	for <freebsd-hackers@freebsd.org>;
	Sun,  6 Feb 2005 06:16:43 +0000 (GMT)
Received: from panther.cs.ucla.edu (Panther.CS.UCLA.EDU [131.179.128.25])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 9FDDF43D5C
	for <freebsd-hackers@freebsd.org>;
	Sun,  6 Feb 2005 06:16:43 +0000 (GMT)
	(envelope-from yanyu@CS.UCLA.EDU)
Received: from localhost (yanyu@localhost)j166GeW26933
	for <freebsd-hackers@freebsd.org>;
	Sat, 5 Feb 2005 22:16:41 -0800 (PST)
Date: Sat, 5 Feb 2005 22:16:40 -0800 (PST)
From: Yan Yu <yanyu@CS.UCLA.EDU>
To: freebsd-hackers@freebsd.org
In-Reply-To: <Pine.GSO.4.58.0501251028210.8888@panther.cs.ucla.edu>
Message-ID: <Pine.GSO.4.58.0502052156360.26089@panther.cs.ucla.edu>
References: <Pine.GSO.4.58.0501241426470.2472@panther.cs.ucla.edu>
	<Pine.GSO.4.58.0501251028210.8888@panther.cs.ucla.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Subject: falloc()
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
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: Sun, 06 Feb 2005 06:16:44 -0000

Hi, all,
  I am wondering if there is a way to use kernel loadable module to
replace the original falloc() (kern/kern_descrip.c) in the system.
I know how to do this if the funciton to be replaced is some system call
function or ufs* operatio ( i could just change the symbol table which
holds these function pointers),.
but i could not find the symbol table which holds the falloc() function
pointer...

Any pointers are appreciated!
yan