Re: [hatari-devel] 68020 addressing modes not correctly disassembled

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 21/06/2020 à 16:46, Christian Zietz a écrit :
> Thorsten Otto schrieb:
>
> > Hm, you are right, but only when cpulevel >= 2. IMHO that should always
> > be disassembled;
>
> This is of course at the discretion of the Hatari developers, but I
> disagree. Imho, the Hatari disassembler is mostly a helper while
> interactively debugging a program. It is not a general purpose
> disassembler to, e.g., reverse-engineer software [1].
>
> Imagine how confusing it would be if you single stepped a through a
> program in 68000 mode, saw a perfectly disassembled 68020-and-above
> instruction (without realizing that it's 68020-and-above) and then the
> emulated CPU correctly took the invalid instruction exception.
>
> Regards
> Christian

Hi

exactly, disassembler is meant to disassemble what is currently 
happening, using current HW config. So it's normal that in 68000 mode 
you don't see 68020+ opcodes disassembled.
As you said, it would be highly confusing to see 68020 opcodes when 
trying to crack a games's protection, while they would result in various 
exception when running in 68000 mode.

Nicolas