From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2060 invoked by alias); 13 Oct 2014 16:04:06 -0000 Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org Received: (qmail 1951 invoked by uid 89); 13 Oct 2014 16:04:05 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.3 required=5.0 tests=AWL,BAYES_00,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: glazunov.sibelius.xs4all.nl Received: from sibelius.xs4all.nl (HELO glazunov.sibelius.xs4all.nl) (83.163.83.176) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Mon, 13 Oct 2014 16:04:03 +0000 Received: from glazunov.sibelius.xs4all.nl (kettenis@localhost [127.0.0.1]) by glazunov.sibelius.xs4all.nl (8.14.5/8.14.3) with ESMTP id s9DG3ta8016083; Mon, 13 Oct 2014 18:03:55 +0200 (CEST) Received: (from kettenis@localhost) by glazunov.sibelius.xs4all.nl (8.14.5/8.14.3/Submit) id s9DG3sAq002782; Mon, 13 Oct 2014 18:03:54 +0200 (CEST) Date: Mon, 13 Oct 2014 16:04:00 -0000 Message-Id: <201410131603.s9DG3sAq002782@glazunov.sibelius.xs4all.nl> From: Mark Kettenis To: brobecker@adacore.com CC: palves@redhat.com, gdb@sourceware.org In-reply-to: <20141013133809.GB4805@adacore.com> (message from Joel Brobecker on Mon, 13 Oct 2014 06:38:09 -0700) Subject: Re: VAX Ultrix? (Re: GDB dropping support for mips-irix and alpha-tru64) References: <20140911185249.GA13931@adacore.com> <5439406D.6060107@redhat.com> <20141013133809.GB4805@adacore.com> X-SW-Source: 2014-10/txt/msg00030.txt.bz2 > Date: Mon, 13 Oct 2014 06:38:09 -0700 > From: Joel Brobecker > > > Going over the supported hosts in configure.host, I noticed we still > > "support" VAX Ultrix / 4.2BSD: > > > > vax-*-bsd*) gdb_host=vax ;; > > vax-*-ultrix*) gdb_host=vax ;; > > > > Does it make sense to keep support for old Ultrix given we're > > dropping OSF/1 / Tru64? > > Wikipedia says that VAX production ceased in 2005. The last VAX-specific > patch I can see being submitted to gdb-patches is us mentioning support > for VAX floats in the Ada mode (which we removed in 2010). VAX VMS was > removed in 2010 from BFD. There seems to be some regular activity around > VAX on the GCC side, though, but Ultrix itself seems to be no longer be > supported. There are probably quite a few VAXen still running. Just learned last week there are still some radiotelescopes around running a VAX to control the telescope. But they're probably running VMS on those though. If you want, there's the SIMH simulator. > So this seems to indicate that we will be able to remove support > for Ultrix. FWIW, I kept the VAX Ultrix and VAX 4.2BSD code around as an example of how a classic ptrace(2) implementation works. Helped me a great bit when refactoring inf-ptrace.c back in the days. Linux really turned ptrace(2) into a mess... Other than the educational value, there is no point in keeping Ultrix and BSD4.2 support alive. I'm pretty sure that GDB has become too bloated to compile and/or run on these systems. > > Below's the table I was building, listing the full set of > > supported hosts, according to configure.host, mapping OS to triplet. > > > | HP-UX | hppa*-*-hpux* | > > | HP-UX | ia64-*-hpux* | > > I suspect that HP-UX will no longer find any takers. AdaCore had to > step-up many many years go to keep those alive. The situation is > different today, and we are stepping down. It'd be somewhat sad to see inf-ttrace.c go. IMHO ttrace(2) is by far the best example of how to do a proper threads-aware debugger interface.