From owner-cvs-all Mon Dec 28 19:35:18 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id TAA07911 for cvs-all-outgoing; Mon, 28 Dec 1998 19:35:18 -0800 (PST) (envelope-from owner-cvs-all@FreeBSD.ORG) Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id TAA07904; Mon, 28 Dec 1998 19:35:13 -0800 (PST) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id OAA01716; Tue, 29 Dec 1998 14:04:17 +1030 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.1/8.9.0) id OAA32845; Tue, 29 Dec 1998 14:04:17 +1030 (CST) Message-ID: <19981229140417.A32838@freebie.lemis.com> Date: Tue, 29 Dec 1998 14:04:17 +1030 From: Greg Lehey To: Doug Rabson , Peter Wemm Cc: Bruce Evans , jonny@jonny.eng.br, cvs-all@FreeBSD.ORG, cvs-committers@FreeBSD.ORG Subject: Re: Use of LKMs (was: cvs commit: src/share/mk bsd.kern.mk src/sys/alpha/conf Makefile.alpha) References: <199812230532.NAA39231@spinner.netplex.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: ; from Doug Rabson on Wed, Dec 23, 1998 at 10:30:24AM +0000 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk On Wednesday, 23 December 1998 at 10:30:24 +0000, Doug Rabson wrote: > On Wed, 23 Dec 1998, Peter Wemm wrote: > >> Greg Lehey wrote: >>> On Saturday, 19 December 1998 at 23:27:39 +1100, Bruce Evans wrote: >>>>> #define quoting(Bruce Evans) >>>>> // src/lkm -> src/sys/lkm (like src/sys/modules) >>>>> >>>>> Is there a reason to keep the lkm's, now that kld's are working ? >>>>> (Aren't they ?) >>>> >>>> They might still be being used. >>> >>> [Somehow I missed the original of this] >>> >>> What's the current situation for kld debugging? I'm using Vinum as an >>> lkm because I can debug it that way. >> >> It works just fine, with one exception.. With LKM's you use a fixed >> offset to skip the header - 0x20 from memory. With KLD's you have to get >> that from the header: >> # objdump --headers /modules/vinum.ko | more >> Idx Name Size VMA LMA File off Algn >> [..] >> 6 .text 0000915c 000051e4 000051e4 000051e4 2**2 >> CONTENTS, ALLOC, LOAD, READONLY, CODE >> In this case, it would be 0x51e4 as the symbol offset rather than 0x20. >> >> Scriptifying that could be fun though.. :-/ > > Perhaps an #ifdef DDB extra field in struct linker_file which the ELF > backend could fill in with the correct offset? After struggling through the structures, I now understand this statement. Yes, I think this would be an *excellent* idea. Peter? Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message