From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1MJ3mG-0008Rf-H5 for mharc-grub-devel@gnu.org; Tue, 23 Jun 2009 07:03:00 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MJ3mD-0008N2-HQ for grub-devel@gnu.org; Tue, 23 Jun 2009 07:02:57 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MJ3m8-0008Dy-90 for grub-devel@gnu.org; Tue, 23 Jun 2009 07:02:56 -0400 Received: from [199.232.76.173] (port=48354 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MJ3m7-0008DL-W8 for grub-devel@gnu.org; Tue, 23 Jun 2009 07:02:52 -0400 Received: from mx20.gnu.org ([199.232.41.8]:3103) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MJ3m7-0003xT-Bm for grub-devel@gnu.org; Tue, 23 Jun 2009 07:02:51 -0400 Received: from aybabtu.com ([69.60.117.155]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1MJ3m6-0006Kh-Ow for grub-devel@gnu.org; Tue, 23 Jun 2009 07:02:50 -0400 Received: from [192.168.10.10] (helo=thorin) by aybabtu.com with esmtp (Exim 4.69) (envelope-from ) id 1MJ2iv-0005c8-2G for grub-devel@gnu.org; Tue, 23 Jun 2009 11:55:29 +0200 Received: from rmh by thorin with local (Exim 4.69) (envelope-from ) id 1MJ3lw-0006Fz-S1 for grub-devel@gnu.org; Tue, 23 Jun 2009 13:02:40 +0200 Date: Tue, 23 Jun 2009 13:02:40 +0200 From: Robert Millan To: The development of GRUB 2 Message-ID: <20090623110240.GA24028@thorin> References: <20090621181748.GA21152@thorin> <20090621225332.GB2360@thorin> <1245633761.9864.34.camel@mj> <20090622095252.GC8969@thorin> <1245699543.2561.1.camel@mj> <20090622205213.GB7871@thorin> <20090622213232.GB10027@thorin> <1245707083.5069.2.camel@mj> <20090622224327.GB11998@thorin> <1245718416.7956.2.camel@mj> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1245718416.7956.2.camel@mj> Organization: free as in freedom X-Message-Flag: Worried about Outlook viruses? Switch to Thunderbird! www.mozilla.com/thunderbird X-Debbugs-No-Ack: true User-Agent: Mutt/1.5.18 (2008-05-17) X-Detected-Operating-System: by mx20.gnu.org: GNU/Linux 2.6 (newer, 1) X-detected-operating-system: by monty-python.gnu.org: Genre and OS details not recognized. Subject: Re: [PATCH] access gdtdesc on segment 0 unconditionally (Re: [PATCH] i386-qemu port) X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: The development of GRUB 2 List-Id: The development of GRUB 2 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Jun 2009 11:02:58 -0000 On Mon, Jun 22, 2009 at 08:53:36PM -0400, Pavel Roskin wrote: > On Tue, 2009-06-23 at 00:43 +0200, Robert Millan wrote: > > > If I omit ADDR32 on i386-pc, I get: > > > > 836f: 2e 66 0f 01 16 68 83 lgdtl %cs:-0x7c98 > > > > "-0x7c98" being the signed version of 0x8368, which is also 16-bit. What is > > really odd is that you got 0x168 which is an offset to 0x8200, when in fact > > %cs is 0, so I don't think your binary would work (did you test it?). > > That's because you are disassembling the linked image after relocation > and I'm disassembling the object file. But it's the linked image that will be executed. The object file is only for ld consumption (and it doesn't contain any absolute addresses, even for instructions that require them, because link address has not yet been specified). -- Robert Millan The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and how) you may access your data; but nobody's threatening your freedom: we still allow you to remove your data and not access it at all."