[patch] x86: fix ESP corruption CPU bug

[linux-os]

On Mon, 14 Mar 2005, Jakob Eriksson wrote:

> Andi Kleen wrote:
>
>> Stas Sergeev <stsp at aknet.ru> writes:
>> 
>>>> Another way of saying the same thing: I absolutely hate seeing
>>>> patches that fix some theoretical issue that no Linux apps will ever
>>>> care about.
>>>> 
>>> No, it is not theoretical, but it is mainly
>>> about a DOS games and an MS linker, as for
>>> me. The things I'd like to get working, but
>>> the ones you may not care too much about:)
>>> The particular game I want to get working,
>>> is "Master of Orion 2" for DOS.
>>> 
>> 
>> How about you just run it in dosbox instead of dosemu ?
>> 
>
> Yes, that's a solution of course, but it is a bit like saying why
> not use Open Office instead of MS Word.
>
> A long term goal of wine is to support DOS apps to. Of course
> it's not a priority, but it's there.
>
> regards,
> Jakob
>

Can you tell me how the invisible high-word (invisible in VM-86, and
in real mode) could possibly harm something running in VM-86 or
read-mode ???  I don't even think it's a BUG. If the transition
into and out of VM-86 doesn't handle the fact that the high-word
of the stack hasn't been used in VM-86, then that piece of code
is bad (the SP isn't even the same stack, BTW).


Cheers,
Dick Johnson
Penguin : Linux version 2.6.11 on an i686 machine (5537.79 BogoMips).
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