Date: Wed, 23 Dec 1998 10:30:24 +0000 (GMT) From: Doug Rabson <dfr@nlsystems.com> To: Peter Wemm <peter@netplex.com.au> Cc: Greg Lehey <grog@lemis.com>, Bruce Evans <bde@zeta.org.au>, 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) Message-ID: <Pine.BSF.4.01.9812231028570.25052-100000@herring.nlsystems.com> In-Reply-To: <199812230532.NAA39231@spinner.netplex.com.au>
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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? -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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