From owner-freebsd-hackers@FreeBSD.ORG Thu Apr 10 15:14:35 2003 Return-Path: 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 4FE8137B401 for ; Thu, 10 Apr 2003 15:14:35 -0700 (PDT) Received: from stork.mail.pas.earthlink.net (stork.mail.pas.earthlink.net [207.217.120.188]) by mx1.FreeBSD.org (Postfix) with ESMTP id C268043F75 for ; Thu, 10 Apr 2003 15:14:34 -0700 (PDT) (envelope-from tlambert2@mindspring.com) Received: from pool0274.cvx40-bradley.dialup.earthlink.net ([216.244.43.19] helo=mindspring.com) by stork.mail.pas.earthlink.net with asmtp (SSLv3:RC4-MD5:128) (Exim 3.33 #1) id 193kJO-00042A-00; Thu, 10 Apr 2003 15:14:27 -0700 Message-ID: <3E95EC17.7746B6D9@mindspring.com> Date: Thu, 10 Apr 2003 15:11:35 -0700 From: Terry Lambert X-Mailer: Mozilla 4.79 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: jhs@berklix.com References: <200304101843.h3AIh4C65481@flip.jhs.private> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-ELNK-Trace: b1a02af9316fbb217a47c185c03b154d40683398e744b8a4f2cacdcf594cb859f4c9535a33c430cb667c3043c0873f7e350badd9bab72f9c350badd9bab72f9c cc: freebsd-hackers@freebsd.org cc: Michael Elbel Subject: Re: Anyone seen 4.8-RELEASE running on a real 386 (not 486 586 etc) ? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Apr 2003 22:14:35 -0000 Julian Stacey wrote: > freebsd-hackers@, > Anyone seen 4.8-RELEASE running on a real 386 processor (not a 486, 586 etc) ? > > I have a 386 that runs 4.7, dmesg below, both GENERIC & my own kernel; > But it wont boot 4.8 { either generic or my own config } compiled on my > other 4.8 box. I tried making with & without /etc/make.conf > CFLAGS = -m386 -march=i386 -msoft-float -mcpu=i386 -O -pipe > COPTFLAGS= -m386 -march=i386 -msoft-float -mcpu=i386 -O -pipe > I tried the /kernel copied from a 4.8 cdrom to hard disk (no cdrom > drive on the box). I tried 4.8 boot floppies (to prove its not > something wrong in hard disc /boot) Every 4.8 kernel crashes during boot -s. You must config your kernel with a CPU type of 386, so that it will not atttempt to use 486-specific instructions, and so it will emulate kernel write faulting, since the 386 does not do this correctly. There was a recent discussion in which people were attempting to murder the 386 support, in which a number of instructions and patches were listed. You should look in the mailing list archives for more information. -- Terry