Re: AI and decompilation?

From	Dan Espen <dan1espen@gmail.com>
Newsgroups	alt.folklore.computers, comp.sys.raspberry-pi
Subject	Re: AI and decompilation?
Date	2021-01-04 20:59 -0500
Organization	A noiseless patient Spider
Message-ID	<rt0h69$a30$2@dont-email.me> (permalink)
References	(2 earlier) <rsvkik$2s5$2@dont-email.me> <rt030d$k64$1@dont-email.me> <rt063a$78i$1@dont-email.me> <rt06n7$glm$1@dont-email.me> <jqg7vfh17h511fvieccnb52np6jmvgbjpo@4ax.com>

Cross-posted to 2 groups.

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J. Clarke <jclarke.873638@gmail.com> writes:

> On Mon, 4 Jan 2021 23:00:54 +0000, Pancho
> <Pancho.Dontmaileme@outlook.com> wrote:
>
>>On 04/01/2021 22:50, Dan Espen wrote:
>>> Pancho <Pancho.Dontmaileme@outlook.com> writes:
>>> 
>>>> On 04/01/2021 17:51, gareth evans wrote:
>>>>> On 04/01/2021 13:08, Pancho wrote:
>>>>>> On 04/01/2021 11:00, gareth evans wrote:
>>>>>>> Thinking back to my first job, nearly 50 years ago now,
>>>>>>> when I had to dis-assemble DEC's paper tape BASIC
>>>>>>> interpreter in order to enhance it, I guess that
>>>>>>> dis-assemblers and decompilers must now be ten-a-penny,
>>>>>>> especially for programs running under Windows where
>>>>>>> the structure of Windows programs is well-known with
>>>>>>> an assumption that C was the source language?
>>>>>>>
>>>>>>> But I wonder if Artificial Intelligence could, after
>>>>>>> being fed with numerous instruction sets, take a
>>>>>>> block of binary, and analyse its source without
>>>>>>> any prior knowledge of the instruction set?
>>>>>>>
>>>>>>> I am particularly interested in the Binary Blob
>>>>>>> provided for Raspberry Pi computers, with a view to
>>>>>>> getting detailed knowledge of the video processors
>>>>>>> employed therein.
>>>>>>>
>>>>>> I think a lot of the problem is defining the question.
>>>>>>
>>>>>> What do you want it to do?
>>>>>>
>>>>> I don't want it to do anything. I want to play at a low level
>>>>> with the thing ... large oaks from little acorns grow.
>>>>>
>>>>
>>>> Play with what thing? What is an instruction set, what is the Binary
>>>> Blob? Why do you need an AI?
>>>>
>>>> Most compilers leave fingerprints on executables you don't need an AI
>>>> to detect them. I remember decompiling in the early 80's but complex
>>>> modern code can often be a challenge to naively reverse engineer a
>>>> high level understanding from even if you do have source code. Take
>>>> away sensible variable and function names and you are stuffed.
>>> 
>>> I've had more than one experience in putting those meaningful variable
>>> names right back.  It's actually pretty easy, a somewhat rote process.
>>> Find the read input instruction.  Since you know the layout of the input
>>> record, you now have labels to many of the references to that input
>>> area.
>>> 
>>> I think you can work out how to proceed.
>>> 
>>> 
>>Without the source how do you know any meaningful variable names in the 
>>first place?
>
> You start with the inputs and outputs and work into the algorithms and
> eventually maybe you can make sense of it.

Yep.

One place I was working they had a lost source code program
reconstructed from object code and they were complaining no one
could work on it because of the variable and routine names.

Seemed easy enough to me and I fixed it up in a day or 2.

-- 
Dan Espen

Thread

AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-04 11:00 +0000
  Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-04 11:42 +0000
  Re: AI and decompilation? Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-04 13:08 +0000
    Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-04 17:51 +0000
      Re: AI and decompilation? Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-04 21:57 +0000
        Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-04 22:23 +0000
          Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 23:09 +0000
        Re: AI and decompilation? Dan Espen <dan1espen@gmail.com> - 2021-01-04 17:50 -0500
          Re: AI and decompilation? Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-04 23:00 +0000
            Re: AI and decompilation? Peter Flass <peter_flass@yahoo.com> - 2021-01-04 16:59 -0700
            Re: AI and decompilation? J. Clarke <jclarke.873638@gmail.com> - 2021-01-04 20:42 -0500
              Re: AI and decompilation? Dan Espen <dan1espen@gmail.com> - 2021-01-04 20:59 -0500
            Re: AI and decompilation? Dan Espen <dan1espen@gmail.com> - 2021-01-04 20:55 -0500
              Re: AI and decompilation? Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-05 10:38 +0000
                Re: AI and decompilation? Bob Eager <news0073@eager.cx> - 2021-01-05 12:46 +0000
                Re: AI and decompilation? Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-05 13:43 +0000
                Re: AI and decompilation? Bob Eager <news0073@eager.cx> - 2021-01-05 14:23 +0000
                Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 15:22 +0000
                Re: AI and decompilation? Dan Espen <dan1espen@gmail.com> - 2021-01-05 09:05 -0500
            Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-05 10:51 +0000
              Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-05 11:52 +0000
              Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 12:06 +0000
              Re: AI and decompilation? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-05 20:12 +0000
          Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 11:45 +0000
            Re: AI and decompilation? Peter Flass <peter_flass@yahoo.com> - 2021-01-05 14:25 -0700
        Re: AI and decompilation? J. Clarke <jclarke.873638@gmail.com> - 2021-01-04 20:38 -0500
          Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 11:54 +0000
          Re: AI and decompilation? Peter Flass <peter_flass@yahoo.com> - 2021-01-05 14:06 -0700
            Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 22:52 +0000
        Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-05 10:29 +0000
  Re: AI and decompilation? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-04 11:05 -0500
    Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 17:07 +0000
      Re: AI and decompilation? scott@slp53.sl.home (Scott Lurndal) - 2021-01-04 17:52 +0000
        Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-05 10:28 +0000
          Re: AI and decompilation? Thomas Koenig <tkoenig@netcologne.de> - 2021-01-05 13:06 +0000
            Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-05 13:41 +0000
            Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 15:30 +0000
              Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-05 16:42 +0000
                Re: AI and decompilation? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-05 20:12 +0000
                Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 20:20 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-05 22:23 +0000
                Re: AI and decompilation? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-06 00:14 +0000
                Re: AI and decompilation? Eli the Bearded <*@eli.users.panix.com> - 2021-01-06 02:17 +0000
                Re: AI and decompilation? Björn Lundin <b.f.lundin@gmail.com> - 2021-01-08 14:39 +0100
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-08 15:07 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-08 15:56 +0000
                Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-08 15:35 +0000
                Re: AI and decompilation? Eli the Bearded <*@eli.users.panix.com> - 2021-01-08 20:02 +0000
                Re: AI and decompilation? Björn Lundin <b.f.lundin@gmail.com> - 2021-01-10 15:12 +0100
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-06 09:36 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 10:43 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-06 18:09 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 18:29 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-06 18:37 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 21:03 +0000
                Re: AI and decompilation? Björn Lundin <b.f.lundin@gmail.com> - 2021-01-08 14:45 +0100
                Re: AI and decompilation? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-08 18:06 +0000
                Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-08 18:44 +0000
                Re: AI and decompilation? A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-09 03:02 +0000
                Re: AI and decompilation? A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-09 02:58 +0000
                Re: AI and decompilation? Andy Burns <usenet@andyburns.uk> - 2021-01-06 18:35 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-06 18:39 +0000
                Re: AI and decompilation? Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-06 19:03 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-06 19:08 +0000
                Re: AI and decompilation? Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-06 19:19 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-07 04:07 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-07 12:59 +0000
                Re: AI and decompilation? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-08 21:41 -0500
                Re: AI and decompilation? Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-09 12:25 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-09 12:46 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-09 15:49 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-09 18:33 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-09 19:20 +0000
                Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-09 21:05 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-09 23:19 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-10 12:17 +0000
                Re: AI and decompilation? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-09 16:54 -0500
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-09 23:48 +0000
                Re: AI and decompilation? A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-10 02:00 +0000
                Re: AI and decompilation? druck <news@druck.org.uk> - 2021-01-09 18:36 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-09 19:28 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-10 12:15 +0000
                Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-10 12:33 +0000
                Re: AI and decompilation? Andy Burns <usenet@andyburns.uk> - 2021-01-10 13:18 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-10 14:01 +0000
                Re: AI and decompilation? TimS <timstreater@greenbee.net> - 2021-01-10 15:14 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-10 13:59 +0000
                Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-10 14:46 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-10 15:34 +0000
                Re: AI and decompilation? Andy Burns <usenet@andyburns.uk> - 2021-01-10 15:05 +0000
                Re: AI and decompilation? Axel Berger <Spam@Berger-Odenthal.De> - 2021-01-10 17:28 +0100
                Re: AI and decompilation? Andy Burns <usenet@andyburns.uk> - 2021-01-11 17:25 +0000
                Re: AI and decompilation? TimS <timstreater@greenbee.net> - 2021-01-10 15:13 +0000
                Re: AI and decompilation? Andy Burns <usenet@andyburns.uk> - 2021-01-10 15:35 +0000
                Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-10 15:35 +0000
                Re: AI and decompilation? TimS <timstreater@greenbee.net> - 2021-01-10 17:23 +0000
                Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-10 18:17 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-11 03:44 +0000
                Re: AI and decompilation? TimS <timstreater@greenbee.net> - 2021-01-11 11:00 +0000
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-11 03:36 +0000
                Re: AI and decompilation? Andy Burns <usenet@andyburns.uk> - 2021-01-06 21:34 +0000
                Re: AI and decompilation? druck <news@druck.org.uk> - 2021-01-06 18:37 +0000
                Re: AI and decompilation? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-08 21:09 -0500
                Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-06 09:32 +0000
                Re: AI and decompilation? Björn Lundin <b.f.lundin@gmail.com> - 2021-01-08 14:56 +0100
            Re: AI and decompilation? Peter Flass <peter_flass@yahoo.com> - 2021-01-05 14:25 -0700
            Re: AI and decompilation? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2021-01-06 14:17 +0200
              Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-06 12:42 +0000
                Re: AI and decompilation? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2021-01-06 16:42 +0200
                Re: AI and decompilation? "Kerr-Mudd,John" <notsaying@127.0.0.1> - 2021-01-08 09:48 +0000
                Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-08 10:27 +0000
              Re: AI and decompilation? usenet@only.tnx (Questor) - 2021-01-08 21:40 +0000
          Re: AI and decompilation? Peter Flass <peter_flass@yahoo.com> - 2021-01-05 14:06 -0700
            Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-05 22:27 +0000
              Re: AI and decompilation? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-06 00:14 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 08:25 +0000
                Re: AI and decompilation? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-08 21:52 -0500
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-09 15:37 +0000
                Re: AI and decompilation? Peter Flass <peter_flass@yahoo.com> - 2021-01-10 06:40 -0700
              Re: AI and decompilation? scott@slp53.sl.home (Scott Lurndal) - 2021-01-06 15:15 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 16:09 +0000
                Re: AI and decompilation? scott@slp53.sl.home (Scott Lurndal) - 2021-01-06 17:07 +0000
                Re: AI and decompilation? Martin Gregorie <martin@mydomain.invalid> - 2021-01-06 17:38 +0000
          Re: AI and decompilation? druck <news@druck.org.uk> - 2021-01-05 21:20 +0000
    Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-04 17:47 +0000
    Re: AI and decompilation? Dan Espen <dan1espen@gmail.com> - 2021-01-04 14:18 -0500
      Re: AI and decompilation? Peter Flass <peter_flass@yahoo.com> - 2021-01-04 16:54 -0700
    Re: AI and decompilation? Theo <theom+news@chiark.greenend.org.uk> - 2021-01-04 23:01 +0000
  Re: AI and decompilation? Eli the Bearded <*@eli.users.panix.com> - 2021-01-04 20:11 +0000
  Re: AI and decompilation? Richard Kettlewell <invalid@invalid.invalid> - 2021-01-05 09:07 +0000
    Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-05 09:47 +0000
      Re: AI and decompilation? Richard Kettlewell <invalid@invalid.invalid> - 2021-01-05 11:13 +0000
        Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 12:12 +0000
          Re: AI and decompilation? Richard Kettlewell <invalid@invalid.invalid> - 2021-01-05 13:39 +0000
            Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 15:32 +0000
              Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 15:40 +0000
          Re: AI and decompilation? scott@slp53.sl.home (Scott Lurndal) - 2021-01-05 16:02 +0000
        Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-05 18:27 +0000
        Re: AI and decompilation? Vir Campestris <vir.campestris@invalid.invalid> - 2021-01-05 21:15 +0000
          Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 22:54 +0000
    Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 11:56 +0000
      Re: AI and decompilation? A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-05 14:11 +0000
        Re: AI and decompilation? Bob Eager <news0073@eager.cx> - 2021-01-05 14:22 +0000
        Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 15:35 +0000
          Re: AI and decompilation? Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-05 18:47 +0000
            Re: AI and decompilation? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-05 20:15 +0000
    Re: AI and decompilation? J. Clarke <jclarke.873638@gmail.com> - 2021-01-05 07:32 -0500
    Re: AI and decompilation? scott@slp53.sl.home (Scott Lurndal) - 2021-01-05 16:00 +0000
  Re: AI and decompilation? Adrian Caspersz <email@here.invalid> - 2021-01-05 11:26 +0000
    Re: AI and decompilation? Thomas Koenig <tkoenig@netcologne.de> - 2021-01-05 13:07 +0000
      Re: AI and decompilation? The Natural Philosopher <tnp@invalid.invalid> - 2021-01-05 13:42 +0000
      Re: AI and decompilation? Eli the Bearded <*@eli.users.panix.com> - 2021-01-05 18:31 +0000
  Re: AI and decompilation? "K. Krause" <klemens.krause@gmx.net> - 2021-01-05 16:01 +0100
  Re: AI and decompilation? druck <news@druck.org.uk> - 2021-01-05 20:51 +0000
    Re: AI and decompilation? gareth evans <headstone255@yahoo.com> - 2021-01-05 22:51 +0000
      Re: AI and decompilation? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-08 22:23 -0500
  Re: AI and decompilation? Andy Burns <usenet@andyburns.uk> - 2021-02-12 15:40 +0000

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