From: Angelo Papenhoff <aap@papnet.eu>
To: tuhs@tuhs.org
Subject: [TUHS] Re: Software written in B
Date: Wed, 14 Jun 2023 22:03:19 +0200 [thread overview]
Message-ID: <ZIodB1CeqLW4M8wn@indra.papnet.eu> (raw)
In-Reply-To: <ZImp0653GK31zDbB@indra.papnet.eu>
After writing this mail I actually started reversing the B binaries.
You can find them here: http://squoze.net/B/programs/
I did find some differences in versions of the B runtime and library.
Especially interesting was an implementation of the cksto routine
in su and stty that checks whether an address in an assignment is in a
reasonable range ("LV out of range" error if not)
What is perhaps interesting historically is that the su binary contains
a hardcoded password ^Q^R^S^T, which is not printable for a good reason:
it is given as a command line argument.
I will hopefully continue with this in the next time (if, goto, mail and
glob are left).
Best,
aap
On 14/06/23, Angelo Papenhoff wrote:
> Thank you two for finding this!
> I did some disassembling yesterday and have uploaded brt1.s and brt2.s
> to my site now: http://squoze.net/B/brt/ (I haven't actually assembled
> them yet, there may be mistakes)
>
> Some observations:
>
> - The 'chain' format is actually a linked list and not a list of
> addresses. Phil and I both got this wrong.
>
> - The "Init" string is an error message if for some reason the B init
> chain didn't run or main doesn't look like a function
>
> - The cmdline arguments overwrite part of the init code. There's about
> 80 bytes of space for them before it overwrites the code that builds the
> argv vector
>
> - brt2.s is only to mark the beginning of the stack
>
>
> I also saw some differences in the bilib code but haven't really
> analyzed that part (yet?)
>
> Would be really great if we could get all the files disassembled and
> decompiled and restore the source code for everything :)
>
> Best,
> Angelo
next prev parent reply other threads:[~2023-06-14 20:03 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-07 10:14 [TUHS] " Sebastien F4GRX
2023-06-07 10:38 ` [TUHS] " Lars Brinkhoff
2023-06-07 15:05 ` Angelo Papenhoff
2023-06-07 15:57 ` Clem Cole
2023-06-07 16:21 ` Lars Brinkhoff
2023-06-07 17:26 ` Bakul Shah
2023-06-07 18:16 ` Phil Budne
2023-06-07 23:49 ` Andrew Hume
2023-06-08 2:10 ` segaloco via TUHS
2023-06-08 3:31 ` Phil Budne
2023-06-08 15:05 ` segaloco via TUHS
2023-06-14 11:51 ` Angelo Papenhoff
2023-06-14 20:03 ` Angelo Papenhoff [this message]
2023-06-14 21:53 ` segaloco via TUHS
2023-06-14 22:05 ` Angelo Papenhoff
2023-06-15 8:00 ` Sebastien F4GRX
2023-06-15 8:21 ` Angelo Papenhoff
2023-06-15 8:33 ` Sebastien F4GRX
2023-06-17 8:19 ` Angelo Papenhoff
2023-06-19 9:52 ` Sebastien F4GRX
2023-06-19 10:18 ` Sebastien F4GRX
2023-06-19 10:48 ` Lars Brinkhoff
2023-06-19 10:55 ` G. Branden Robinson
2023-06-19 11:07 ` Sebastien F4GRX
2023-06-19 18:44 ` segaloco via TUHS
2023-06-23 10:59 ` Angelo Papenhoff
2023-06-23 13:32 ` Sebastien F4GRX
2023-06-23 14:01 ` Angelo Papenhoff
2023-06-23 14:14 ` Sebastien F4GRX
2023-06-23 14:39 ` Angelo Papenhoff
2023-06-23 14:10 ` Sebastien F4GRX
2023-06-23 14:49 ` Angelo Papenhoff
2023-06-23 15:31 ` Sebastien F4GRX
2023-06-23 15:36 ` Angelo Papenhoff
2023-06-23 15:53 ` Sebastien F4GRX
2023-06-08 14:41 ` arnold
2023-06-09 8:56 ` Sebastien F4GRX
2023-06-09 9:57 ` Lars Brinkhoff
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