Messages in this thread | | | Date | Mon, 14 Mar 2005 14:24:05 -0500 | From | Brian Gerst <> | Subject | Re: [patch] x86: fix ESP corruption CPU bug |
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linux-os wrote: > On Mon, 14 Mar 2005, Jakob Eriksson wrote: > >> Andi Kleen wrote: >> >>> Stas Sergeev <stsp@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).
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.
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