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Groups > alt.folklore.computers > #161327

Re: Debugging Adventure using Address Break

From Morten Reistad <first@last.name.invalid>
Newsgroups alt.folklore.computers
Subject Re: Debugging Adventure using Address Break
Date 2016-03-22 13:22 +0100
Organization Me, Myself and I
Message-ID <a0q7sc-6c7.ln1@sambook.reistad.name> (permalink)
References <PM00052E54A86D1850@users-ibook-g4-6.unknown.dom> <PM00052E8E3263F463@aca43280.ipt.aol.com> <5g75sc-3u1.ln1@sambook.reistad.name> <ncr114$re4$1@gioia.aioe.org>

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In article <ncr114$re4$1@gioia.aioe.org>,
Rob Doyle  <radioengr@gmail.com> wrote:
>On 3/21/2016 5:53 AM, Morten Reistad wrote:
>> In article <PM00052E8E3263F463@aca43280.ipt.aol.com>,
>> jmfbahciv  <See.above@aol.com> wrote:
>>> Rod Speed wrote:
>>>> jmfbahciv <See.above@aol.com> wrote
>>>
>>>>>> And this method won't work if they don’t.
>>>>
>>>> And that game doesn’t. So this bit of yours is a complete
>>>> irrelevancy to what is being discussed, whether SET BREAK
>>>> can be used to determine the end point in that particular
>>>> game. It can't.
>>>
>>> The facts are that a person did figure out the last point
>>> using the address break feature of TOPS-10.
>>>
>>> /BAH
>>
>>
>> The way I would go about this, given a tops10 system, read+execute
>> access to the binary but no source is to make a binary with
>> DDT; look at where the data output'ed by the points write came
>> from, and set a break on access to that data. This is a read/write
>> break; not an execute break. For that I would probably have to exit
>> to the command prompt and use the SET BREAK command, but I would
>> get all the data (addresses) from DDT. I would then see where the
>> points accesses came from. I would probably have to search in the
>> binary for that. Possibly manually.
>>
>> This assumes I have no symbols. Once symbols are in place this becomes
>> a lot easier to find.
>>
>> So, yes, the SET BREAK command would be instrumental, but I would
>> be totally lost without DDT too.
>>
>> So, this is a minor verification of Barb's claim.
>>
>> -- mrr
>>
>> (I don't know how to set the read/write breaks directly in DDT, if that
>> is at all possible. I mostly dealt with tops20, which has different syntax
>> for this)
>
>Is the SET BREAK command just a interface to the PDP10 Address 
>Breakpoint hardware?   (using the DATA0 APR opcode)
>
>I was reading the bottom page C-5 of:
><http://bitsavers.org/pdf/dec/pdp10/1982_ProcRefMan.pdf>

Yep. ISTR it could be invoked from inside DDT as well, but I never
did that. I always used the shell command.

-- mrr

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Thread

Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-19 13:23 +0000
  Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-20 06:46 +1100
    Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-20 13:56 +0000
      Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-21 04:51 +1100
        Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-21 12:24 +0000
          Re: Debugging Adventure using Address Break Morten Reistad <first@last.name.invalid> - 2016-03-21 13:53 +0100
            Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-22 04:23 +1100
              Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-22 13:40 +0000
                Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-23 05:01 +1100
            Re: Debugging Adventure using Address Break Rob Doyle <radioengr@gmail.com> - 2016-03-22 01:50 -0700
              Re: Debugging Adventure using Address Break Morten Reistad <first@last.name.invalid> - 2016-03-22 13:22 +0100
              Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-22 13:40 +0000
            Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-22 13:40 +0000
              Re: Debugging Adventure using Address Break usenet@only.tnx (Questor) - 2016-03-26 07:32 +0000
          Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-22 04:24 +1100
          Re: Debugging Adventure using Address Break "Charles Richmond" <numerist@aquaporin4.com> - 2016-03-22 10:20 -0500
            Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-23 13:23 +0000
  Re: Debugging Adventure using Address Break scott@slp53.sl.home (Scott Lurndal) - 2016-03-21 13:58 +0000
  Re: Debugging Adventure using Address Break scott@slp53.sl.home (Scott Lurndal) - 2016-03-21 14:00 +0000
    Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-22 13:40 +0000
      Re: Debugging Adventure using Address Break "Charles Richmond" <numerist@aquaporin4.com> - 2016-03-22 10:24 -0500
  Re: Debugging Adventure using Address Break usenet@only.tnx (Questor) - 2016-03-22 07:19 +0000
  Re: Debugging Adventure using Address Break usenet@only.tnx (Questor) - 2016-03-22 07:19 +0000
    Re: Debugging Adventure using Address Break Morten Reistad <first@last.name.invalid> - 2016-03-22 13:20 +0100
    Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-22 13:40 +0000
      Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-23 04:55 +1100
      Re: Debugging Adventure using Address Break usenet@only.tnx (Questor) - 2016-03-26 07:32 +0000
        Re: Debugging Adventure using Address Break Morten Reistad <first@last.name.invalid> - 2016-03-26 09:55 +0100
          Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-26 13:24 +0000
            Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-27 04:11 +1100
              Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-27 13:26 +0000
                Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-28 04:25 +1100
                Re: Debugging Adventure using Address Break "Charles Richmond" <numerist@aquaporin4.com> - 2016-03-28 15:58 -0500
                Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-29 13:55 +0000
                Re: Debugging Adventure using Address Break Morten Reistad <first@last.name.invalid> - 2016-03-29 17:17 +0200
                Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-30 13:58 +0000
                Re: Debugging Adventure using Address Break scott@slp53.sl.home (Scott Lurndal) - 2016-03-29 16:17 +0000
                Re: Debugging Adventure using Address Break Ahem A Rivet's Shot <steveo@eircom.net> - 2016-03-29 17:57 +0100
                Re: Debugging Adventure using Address Break Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-03-29 17:14 +0000
                Re: Debugging Adventure using Address Break Huge <Huge@nowhere.much.invalid> - 2016-03-29 17:17 +0000
                Re: Debugging Adventure using Address Break scott@slp53.sl.home (Scott Lurndal) - 2016-03-29 17:48 +0000
                Re: Debugging Adventure using Address Break Ibmekon <Ibmekon> - 2016-03-29 21:35 +0100
                Re: Debugging Adventure using Address Break Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-03-29 23:20 +0000
                Re: Debugging Adventure using Address Break Andrew Swallow <am.swallow@btopenworld.com> - 2016-03-30 05:33 +0100
                Re: Debugging Adventure using Address Break "764hho" <764hho@nospam.com> - 2016-03-30 17:23 +1100
                Re: Debugging Adventure using Address Break Ibmekon <Ibmekon> - 2016-03-29 19:28 +0100
                Re: Debugging Adventure using Address Break "Charles Richmond" <numerist@aquaporin4.com> - 2016-03-31 11:10 -0500
                Re: Debugging Adventure using Address Break Ibmekon <Ibmekon> - 2016-03-31 19:20 +0100
                Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-30 13:58 +0000
                Re: Debugging Adventure using Address Break Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-03-30 16:32 +0000
                Re: Debugging Adventure using Address Break scott@slp53.sl.home (Scott Lurndal) - 2016-03-30 16:55 +0000
                Re: Debugging Adventure using Address Break "764hho" <764hho@nospam.com> - 2016-03-31 04:09 +1100
                Re: Debugging Adventure using Address Break Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-03-31 06:22 +0000
                Re: Debugging Adventure using Address Break "Charles Richmond" <numerist@aquaporin4.com> - 2016-03-31 11:13 -0500
                Re: Debugging Adventure using Address Break JimP. <blue@cwahi.net> - 2016-03-31 21:00 -0500
                Re: Debugging Adventure using Address Break "764hho" <764hho@nospam.com> - 2016-03-31 03:49 +1100
                Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-30 05:29 +1100
                Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-30 13:58 +0000
                Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-31 03:41 +1100
                Re: Debugging Adventure using Address Break jmfbahciv <See.above@aol.com> - 2016-03-31 12:41 +0000
                Re: Debugging Adventure using Address Break "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-04-01 05:03 +1100
                Re: Debugging Adventure using Address Break usenet@only.tnx (Questor) - 2016-04-15 08:34 +0000

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