From: Noel Hunt <noel.hunt@gmail.com>
To: Paul Ruizendaal <pnr@planet.nl>
Cc: TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] SDB debugger
Date: Sat, 2 May 2020 10:49:19 +1000 [thread overview]
Message-ID: <CAGfO01xewgGGT7Bdrgobto+hvNbK5=GorNhUhjBHEkq4qRBwVg@mail.gmail.com> (raw)
In-Reply-To: <2F4C604D-F01C-4A82-948A-7E77093B48A1@planet.nl>
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When it comes to Eight Edition, please don't forget Tom Cargill's
'pi'. There was also a version I believe that was used as the
debugger for programs on the Blit/Jerq; it seems to be known as
'4pi' in the source.
On Sat, May 2, 2020 at 6:49 AM Paul Ruizendaal <pnr@planet.nl> wrote:
> Reading some more stuff about the road from 7th Edition to 8th Edition,
> this time about debuggers.
>
> My current understanding is as follows:
>
> - On 6th edition the debugger was ‘cdb’
>
> - On 7th edition it was ‘adb’, a rewrite / evolution from ‘cdb’
>
> - In 32V a new debugger appears, ‘sdb’. Its code seems a derivative from
> ‘adb’, but the command language is substantially reworked and it uses a
> modified variant of the a.out linker format - in essence the beginnings of
> ‘stabs’. Of course the compiler, assembler, linker and related tools all
> emit/recognize these new symbol table elements.
>
> - The July 78 file note by London/Reiser does not mention a reworked
> debugger at all; the 32V tape that is on TUHS has ’sdb' files that are
> dated Feb/Mar 1979. This stuff must have been developed between July 78 and
> March 79.
>
> - In the SysIII and 3BSD code on TUHS (from early 80 and late 79
> respectively) the stabs format is more developed. For SysIII it is ‘VAX
> only’. With these roots, it is not surprising that it is also in 8th
> Edition.
>
>
> Two questions:
>
> (1) According to Wikipedia the original author of the stabs format is
> unknown. It also says that the original author of ‘sdb’ is unknown. Is that
> correct, is the author really unknown?
>
> (2) As far as I can tell, the ’sdb’ debugger was never back ported to 16
> bit Unix, not in the SysIII line and not in the 2.xBSD line. It would seem
> to me that the simple stabs format of 32V would have lent itself to being
> back ported. Is it correct that no PDP11 Unix used (a simple) stabs tool
> chain and debugger?
>
>
>
>
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next prev parent reply other threads:[~2020-05-02 0:50 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-01 20:48 Paul Ruizendaal
2020-05-01 21:57 ` Clem Cole
2020-05-02 9:10 ` Paul Ruizendaal
2020-05-02 16:04 ` Clem Cole
2020-05-01 23:05 ` Jeremy C. Reed
2020-05-02 0:49 ` Noel Hunt [this message]
2020-05-02 1:22 ` Rob Pike
2020-05-02 3:49 ` Noel Hunt
2020-05-02 20:16 ` Paul Ruizendaal
2020-05-03 6:58 ` arnold
2020-05-03 16:13 ` Clem Cole
2020-05-03 16:53 ` Henry Bent
2020-05-03 17:06 ` Henry Bent
2020-05-03 17:13 ` Henry Bent
2020-05-03 20:26 ` Clem Cole
2020-05-05 0:22 ` [TUHS] DEC Compilers (was: " Win Treese
2020-05-05 17:36 ` Paul Winalski
2020-05-05 18:53 ` Dr Iain Maoileoin
2020-05-05 21:59 ` Dan Cross
2020-05-05 21:49 ` Henry Bent
2020-05-03 17:35 ` [TUHS] " Paul Winalski
2020-05-03 21:27 ` Paul Ruizendaal
2020-05-12 4:15 ` Dave Horsfall
2020-05-02 2:52 Doug McIlroy
2020-05-02 17:45 ` Larry McVoy
2020-05-03 16:16 ` Rich Morin
2020-05-12 4:36 ` Dave Horsfall
2020-05-03 2:21 Norman Wilson
2020-05-03 2:41 ` Larry McVoy
2020-05-03 7:14 ` arnold
2020-05-03 3:05 ` Rob Pike
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