Date: Tue, 20 Jul 2004 08:39:31 -0700 From: Marcel Moolenaar <marcel@xcllnt.net> To: Mark Kettenis <kettenis@gnu.org> Cc: cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/kern imgact_elf.c Message-ID: <20040720153931.GA37633@dhcp50.pn.xcllnt.net> In-Reply-To: <200407200958.i6K9wZD4022358@juw15.nfra.nl> References: <200407182028.i6IKS7Su002490@repoman.freebsd.org> <20040719034245.C32601@pooker.samsco.org> <20040719171041.GA22048@ns1.xcllnt.net> <200407200958.i6K9wZD4022358@juw15.nfra.nl>
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On Tue, Jul 20, 2004 at 11:58:35AM +0200, Mark Kettenis wrote: > > I think a redesign of the core file format along the lines you said > above would defenitely pay off. The NetBSD folks have done it, and I > think their approach is pretty elegant. An improtant benefit of their > approach is that it's (almost) machine independent. The BFD code is > pretty much localized in elf.c (look for the functions with netbsd in > their names). Adapting that code for FreeNSD should not be much work. > I don't think any further changes to GDB are needed. One problem I see is that the pid and lwpid, as saved by binutils are mangled into a single id before given to gdb. I guess the trick is to not tell binutils about lwpid. If I'm not mistaken, binutils doesn't really keep track if the lwpids anyway. > Please realize that the problems you're citing largely stem from the > let's simulate-Linux-which-simulates-SVR4 type notes currently used by > FreeBSD. Throwing that all overboard will save much trouble in the > future. Yes, I got that impression as well, but the impact on binutils and the backward compatibility problems are more than I could handle for 5.3. > I'm certainly willing to do some of the legwork, since it'd make life > for me on the GDB side a lot easier if you'd adapt these NetBSD-style > core file notes. I certainly have some time the coming weeks to spend > on it. In principle I'm all for it. I like to see a plan and key players signed up for it, if we're going to do this for 5.3. -- Marcel Moolenaar USPA: A-39004 marcel@xcllnt.net
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