From owner-freebsd-hackers@FreeBSD.ORG  Fri Aug 10 19:14:39 2007
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9041316A417
	for <freebsd-hackers@freebsd.org>; Fri, 10 Aug 2007 19:14:39 +0000 (UTC)
	(envelope-from freebsd.dev@gmail.com)
Received: from wr-out-0506.google.com (wr-out-0506.google.com [64.233.184.235])
	by mx1.freebsd.org (Postfix) with ESMTP id 4D47313C45B
	for <freebsd-hackers@freebsd.org>; Fri, 10 Aug 2007 19:14:39 +0000 (UTC)
	(envelope-from freebsd.dev@gmail.com)
Received: by wr-out-0506.google.com with SMTP id 70so115207wra
	for <freebsd-hackers@freebsd.org>; Fri, 10 Aug 2007 12:14:38 -0700 (PDT)
DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta;
	h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references;
	b=SMUytKitQ3R8y0phndQRWL7RInSZ++KI5JzefGkJEOou+yTYLaGD2o1og9WqkChK+d1n4tPR4wNWuieiraFPrrB39QoCB1TF53F/Iqf40yt2Rf9kKVgGAf11kv+xvHQ3t5nOS3nhVPqbynp6FTP4/x7Aq5c4aBdhWqGndkNjnnY=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta;
	h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references;
	b=bQPjXSfGUpBS+Etb5GPabvKASAIv4904CQNQ0D7Dw9+bqzNAJfFRoDw9dloeAsbXu0RQSO0h4GNMhWUv8oeib3LxmL5DaockCN1lrHI8ADjE75pdgMqxkBvNB5gFMpWhn2KMByXxG+4Zop2i/znW2glxFAoXgiS2oqZIVib6Fcc=
Received: by 10.90.102.20 with SMTP id z20mr4981664agb.1186773277723;
	Fri, 10 Aug 2007 12:14:37 -0700 (PDT)
Received: by 10.90.49.2 with HTTP; Fri, 10 Aug 2007 12:14:37 -0700 (PDT)
Message-ID: <50cd4e5f0708101214s74155d6bqecc8ed6ae80d7c87@mail.gmail.com>
Date: Fri, 10 Aug 2007 14:14:37 -0500
From: "Biks N" <freebsd.dev@gmail.com>
To: freebsd-hackers@freebsd.org
In-Reply-To: <20070808172535.GA8404@nowhere>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
References: <50cd4e5f0708080923p1d441e66ha6b42e277b55f8d@mail.gmail.com>
	<20070808172535.GA8404@nowhere>
Subject: Re: Using userland library in Kernel
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
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: Fri, 10 Aug 2007 19:14:39 -0000

Thanks to everyone :)

On 8/8/07, Craig Boston <cb@severious.net> wrote:
> On Wed, Aug 08, 2007 at 11:23:25AM -0500, Biks N wrote:
> > I am new to FreeBSD kernel programming and I am trying to use userland
> > library (zlib) in FreeBSD kernel. But I am not sure if zlib library is
> > linkable from the kernel.
>
> Normally, no, you can't just link in a library designed for userland
> into the kernel.  Some porting is required to deal with the kernel
> environment -- things such as not having a full C library available,
> different memory management, etc.
>
> In this case however, there is already a zlib implementation in the
> kernel.  IIRC, geom_uzip and the crypto framework both use it.
>
> You may want to check out sys/net/zlib.[ch] and see if it can do what
> you're after.  You'll need to make sure to include a dependency on the
> zlib module and/or add it to your kernel configuration.
>
> Good luck,
> Craig
>