From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1J7qU7-0004dG-2Q for mharc-grub-devel@gnu.org; Thu, 27 Dec 2007 06:01:07 -0500 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1J7qU5-0004c1-IY for grub-devel@gnu.org; Thu, 27 Dec 2007 06:01:05 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1J7qU5-0004bP-1a for grub-devel@gnu.org; Thu, 27 Dec 2007 06:01:05 -0500 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1J7qU4-0004bD-Nq for grub-devel@gnu.org; Thu, 27 Dec 2007 06:01:04 -0500 Received: from aybabtu.com ([69.60.117.155]) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1J7qU4-00022E-9n for grub-devel@gnu.org; Thu, 27 Dec 2007 06:01:04 -0500 Received: from [192.168.10.6] (helo=thorin) by aybabtu.com with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.63) (envelope-from ) id 1J7qTz-0003Ua-Tu for grub-devel@gnu.org; Thu, 27 Dec 2007 12:01:03 +0100 Received: from rmh by thorin with local (Exim 4.63) (envelope-from ) id 1J7qTV-0008NW-HP for grub-devel@gnu.org; Thu, 27 Dec 2007 12:00:29 +0100 Date: Thu, 27 Dec 2007 12:00:29 +0100 From: Robert Millan To: The development of GRUB 2 Message-ID: <20071227110029.GA32072@thorin> References: <1198575687.6484.25.camel@latsun.main.fg> <20071225110756.GA22389@thorin> <1198581793.6484.30.camel@latsun.main.fg> <20071226071732.GB8632@thorin> <20071227095705.GA30225@thorin> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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/1.5.13 (2006-08-11) X-detected-kernel: by monty-python.gnu.org: Genre and OS details not recognized. Subject: Re: Failed to build grub2 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: Thu, 27 Dec 2007 11:01:05 -0000 On Thu, Dec 27, 2007 at 06:43:22PM +0800, Bean wrote: > On Dec 27, 2007 5:57 PM, Robert Millan wrote: > > Why not force it with .code32 / .code16 ? > > No, you can't use .code32/.code16, it will not cause compile error, > but the machine code is wrong. However, you can write it like this: > > .byte 0x66, 0x67 > .code32 > leal 0x200 + data_start - data_next(%ebx,%eax), %eax > .code16 > > 0x66 and 0x67 is the DATA32 and ADDR32 prefix, it tell the cpu that > the next instruction use different registry and address mode. (16-bit > %ax -> 32-bit %eax, 16-bit address mode to 32-bit address mode). Uhm I recall seeing macros for that already: kern/i386/pc/startup.S: DATA32 ADDR32 lgdt gdtdesc I guess those are telling GAS to generate 0x66 and 0x67? -- Robert Millan I know my rights; I want my phone call! What use is a phone call, if you are unable to speak? (as seen on /.)