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Re: Supexec/Super patch?
> |> For now I think it can be only done by changing the BUSERR handler so that
> |> it could emulate all accesses to these variables from the user mode
> |> (I know it could be slow, but I don't think programs do it often).
>
> Continuing after BUSERR on a plain 68000 is tricky at best.
Tricky, yes. If one can assume a few things about the accesses, it's still
doable, though. (I've done it myself in my QL emulator for the ST/Falcon)
Anyway, worrying about this on a plain 68000 doesn't really make much sense
since there's no way to protect the rest of the system.
On an '030, safe Super()/SupExec() is doable and might be useful. I doubt it
would be easy, though.
--
Chalmers University | Why are these | e-mail: rand@cd.chalmers.se
of Technology | .signatures | johan@rand.thn.htu.se
| so hard to do | WWW/ftp: rand.thn.htu.se
Gothenburg, Sweden | well? | (MGIFv5, QLem, BAD MOOD)