From owner-freebsd-hackers@FreeBSD.ORG Mon Mar 22 16:02:45 2010 Return-Path: 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 EE019106564A for ; Mon, 22 Mar 2010 16:02:45 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id BE2728FC12 for ; Mon, 22 Mar 2010 16:02:45 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 7574C46B0D; Mon, 22 Mar 2010 12:02:45 -0400 (EDT) Received: from jhbbsd.localnet (smtp.hudson-trading.com [209.249.190.9]) by bigwig.baldwin.cx (Postfix) with ESMTPA id BCCD98A025; Mon, 22 Mar 2010 12:02:44 -0400 (EDT) From: John Baldwin To: Alexander Best Date: Mon, 22 Mar 2010 12:02:18 -0400 User-Agent: KMail/1.12.1 (FreeBSD/7.3-CBSD-20100217; KDE/4.3.1; amd64; ; ) References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201003221202.18683.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Mon, 22 Mar 2010 12:02:44 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-1.7 required=4.2 tests=AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: freebsd-hackers@freebsd.org Subject: Re: [patch] teach the bootloader minor amd64 knowledge X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Mar 2010 16:02:46 -0000 On Monday 22 March 2010 11:20:10 am Alexander Best wrote: > John Baldwin schrieb am 2010-03-22: > > On Monday 22 March 2010 9:50:05 am Alexander Best wrote: > > > hi there, > > > > since i386 and amd64 are sharing the same bootcode the bootloader > > > gets named > > > "FreeBSD/i386" on amd64 too. the following patch is a cosmetic > > > change to > > have > > > the bootloader identify itself as "FreeBSD/amd64" on amd64. > > > > any thoughts on this one? > > > I would not do this. They really are the same binary. You can take > > a > > /boot/loader built under FreeBSD/i386 and use it to load an amd64 > > kernel and > > vice versa. The one change I looked at doing a while back was > > renaming the > > i386/amd64 boot bits to identify themselves as 'FreeBSD/x86' rather > > than > > 'FreeBSD/i386'. > > sounds nice. however that would introduce some severe inconsistency, because > the term 'i386' is used in many places to define the x86 architecture (uname > -p/-m e.g.). also 'x86' related files/directories are called 'i386'. > > personally i'd like to see the term 'i386' completely replaced by 'x86' > throughout the whole freebsd code. > > if i'm not mistaken 80386 has been dropped in GENERIC in freebsd4 and entirely > in freebsd5. Ah, but 'x86' is commonly used now for things that are shared between i386 and amd64. See sys/x86 in HEAD, sys/arch/x86 in NetBSD, etc. I think even Linux has an x86 tree for shared code between i386 and x86_64. -- John Baldwin