Date: Wed, 12 Jul 2000 10:39:22 +0930 From: Greg Lehey <grog@lemis.com> To: Ben Smithurst <ben@FreeBSD.ORG> Cc: doc@FreeBSD.ORG Subject: Re: small update to handbook about debug kernels Message-ID: <20000712103922.A29642@wantadilla.lemis.com> In-Reply-To: <20000711131846.L11000@strontium.scientia.demon.co.uk> References: <20000711131846.L11000@strontium.scientia.demon.co.uk>
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On Tuesday, 11 July 2000 at 13:18:46 +0100, Ben Smithurst wrote: > Hi, > > I'd like to commit this shortly. Any objections, either on documentation > quality or the technical accuracy? (that's why -hackers is included.) > > > - <para>When the kernel has been built make a copy of it, say > + <para>When the kernel has been built, make a copy of it, say > <filename>kernel.debug</filename>, and then run <command>strip > - -g</command> on the original. Install the original as normal. You > + -g</command> on the original. Install the original as normal. > + Note that from FreeBSD 4.0-RELEASE onwards, these two steps are > + performed automatically, so you should not execute them yourself. > + On all FreeBSD releases, you > may also install the unstripped kernel, but symbol table lookup time for > - some programs will drastically increase, and since the whole kernel is > + some programs will drastically increase. With an a.out kernel, > + since the whole kernel is > loaded entirely at boot time and cannot be swapped out later, several > - megabytes of physical memory will be wasted.</para> > + megabytes of physical memory will also be wasted. However, this should not > + be a problem for most users, as ELF has been the default format for > + kernels since FreeBSD 3.1-RELEASE.</para> I think you should look from the viewpoint of the modern kernel: If you are using version 2 or 3 of FreeBSD, you will need to strip the kernel manually... Note that if you run an a.out kernel with debugging symbols, the whole kernel will be loaded into memory... Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
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