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On 3/2/2025 4:15 PM, Fred. Zwarts wrote:No, it calls a specific emulator, that of a given HHH. There is no requirement for the program DD to be emulated by that program.Op 02.mrt.2025 om 22:21 schreef olcott:Not at all. The fact that DD calls its own emulatorint DD()>
{
int Halt_Status = HHH(DD);
if (Halt_Status)
HERE: goto HERE;
return Halt_Status;
}
>
_DD()
[00002133] 55 push ebp ; housekeeping
[00002134] 8bec mov ebp,esp ; housekeeping
[00002136] 51 push ecx ; make space for local
[00002137] 6833210000 push 00002133 ; push DD
[0000213c] e882f4ffff call 000015c3 ; call HHH(DD)
[00002141] 83c404 add esp,+04
[00002144] 8945fc mov [ebp-04],eax
[00002147] 837dfc00 cmp dword [ebp-04],+00
[0000214b] 7402 jz 0000214f
[0000214d] ebfe jmp 0000214d
[0000214f] 8b45fc mov eax,[ebp-04]
[00002152] 8be5 mov esp,ebp
[00002154] 5d pop ebp
[00002155] c3 ret
Size in bytes:(0035) [00002155]
>
DD emulated by HHH according to the behavior that DD
specifies cannot possibly reach its own "ret" instruction
and terminate normally.
>
This process computes the mapping from the actual input
(not any other damn thing) finite string to the non
terminating behavior that this finite specifies when
it calls its own emulator in recursive emulation.
In other words 'non terminating behavior' means that *HHH* was unable to reach the 'ret' instruction.
makes DD unable to reach its own "ret" instruction.
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