From: Mark Kettenis <mark.kettenis@xs4all.nl>
To: brobecker@adacore.com
Cc: palves@redhat.com, gdb@sourceware.org
Subject: Re: VAX Ultrix? (Re: GDB dropping support for mips-irix and alpha-tru64)
Date: Mon, 13 Oct 2014 16:04:00 -0000 [thread overview]
Message-ID: <201410131603.s9DG3sAq002782@glazunov.sibelius.xs4all.nl> (raw)
In-Reply-To: <20141013133809.GB4805@adacore.com> (message from Joel Brobecker on Mon, 13 Oct 2014 06:38:09 -0700)
> Date: Mon, 13 Oct 2014 06:38:09 -0700
> From: Joel Brobecker <brobecker@adacore.com>
>
> > 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.
next prev parent reply other threads:[~2014-10-13 16:04 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-11 18:52 GDB dropping support for mips-irix and alpha-tru64 Joel Brobecker
2014-09-11 20:53 ` Joel Sherrill
2014-09-12 0:30 ` Joel Brobecker
2014-09-12 0:33 ` Andrew Pinski
2014-09-12 1:11 ` Joel Sherrill
2014-09-12 9:53 ` Matthew Fortune
2014-10-11 14:36 ` VAX Ultrix? (Re: GDB dropping support for mips-irix and alpha-tru64) Pedro Alves
2014-10-13 13:38 ` Joel Brobecker
2014-10-13 13:57 ` Maciej W. Rozycki
2014-10-13 15:02 ` Pedro Alves
2014-10-13 16:04 ` Mark Kettenis [this message]
2014-10-15 13:22 ` Pedro Alves
2014-10-17 13:47 ` GDB is removing VAX Ultrix support Pedro Alves
2014-10-24 17:12 ` Support for VAX Ultrix removed Pedro Alves
2014-10-24 17:11 ` GDB dropping support for mips-irix and alpha-tru64 Pedro Alves
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