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From: olcott <polcott333@gmail.com>
Newsgroups: comp.theory
Subject: Re: Anyone that claims this is not telling the truth
Date: Sun, 18 Aug 2024 07:48:32 -0500
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On 8/18/2024 3:58 AM, Mikko wrote:
> On 2024-08-17 15:09:01 +0000, olcott said:
> 
>> On 8/17/2024 10:06 AM, Richard Damon wrote:
>>> On 8/17/24 10:58 AM, olcott wrote:
>>>> On 8/17/2024 9:10 AM, Richard Damon wrote:
>>>>> On 8/17/24 8:29 AM, olcott wrote:
>>>>>> void DDD()
>>>>>> {
>>>>>>    HHH(DDD);
>>>>>> }
>>>>>>
>>>>>> _DDD()
>>>>>> [00002172] 55         push ebp      ; housekeeping
>>>>>> [00002173] 8bec       mov ebp,esp   ; housekeeping
>>>>>> [00002175] 6872210000 push 00002172 ; push DDD
>>>>>> [0000217a] e853f4ffff call 000015d2 ; call HHH(DDD)
>>>>>> [0000217f] 83c404     add esp,+04
>>>>>> [00002182] 5d         pop ebp
>>>>>> [00002183] c3         ret
>>>>>> Size in bytes:(0018) [00002183]
>>>>>>
>>>>>> *It is a basic fact that DDD emulated by HHH according to*
>>>>>> *the semantics of the x86 language cannot possibly stop*
>>>>>> *running unless aborted* (out of memory error excluded)
>>>>>>
>>>>>
>>>>> No, anyone saying that the above is something that CAN be correctly 
>>>>> emulated by the semantics of the x86 language is just a LIAR.
>>>>>
>>>>
>>>> You are inserting a word that I did not say.
>>>>
>>>
>>> To say that DDD is emulated by HHH means that it must be possible to 
>>> validly do that act.
>>>
>>
>> You are not going to get very far with any claim that
>> emulating a sequence of x86 machine-code bytes is impossible.
> 
> It is impossible to emulate a call if the memory content at the
> called address is not kown (or even whether there is any memory
> at that address). The byte sequence above contains a call to
> an address that is not a part of the shown sequence.
> 

x86utm takes the compiled Halt7.obj file of this c program
https://github.com/plolcott/x86utm/blob/master/Halt7.c
Thus making all of the code of HHH directly available to
DDD and itself. HHH emulates itself emulating DDD.


-- 
Copyright 2024 Olcott "Talent hits a target no one else can hit; Genius
hits a target no one else can see." Arthur Schopenhauer