Re: [patch] x86: fix ESP corruption CPU bug

From: Brian Gerst
Date: Mon Mar 14 2005 - 14:26:50 EST

linux-os wrote:
On Mon, 14 Mar 2005, Jakob Eriksson wrote:

Andi Kleen wrote:

Stas Sergeev <stsp@xxxxxxxx> 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.


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).

Because even in 16-bit mode (real, vm86 or 16-bit protected) you can use 32-bit instructions, with an operand and/or address size override prefix. Of course this only works on 386 or later.

Brian Gerst
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at