Breakage in 'priviledged instructions' handling.

[Lionel Ulmer]

Hi all,

Some games that worked pretty well in Wine (like, for example, Tomb Raider
3) are now failing with latest CVS due to :

Unhandled exception: privileged instruction in 32-bit code (0x0048e2e1).

So I was wondering what changed in the Wine code that suppressed the
emulation of these instructions.

Lionel

[Alexandre Julliard]

Lionel Ulmer  writes:
> Some games that worked pretty well in Wine (like, for example, Tomb Raider
> 3) are now failing with latest CVS due to :
>
> Unhandled exception: privileged instruction in 32-bit code (0x0048e2e1).
>
> So I was wondering what changed in the Wine code that suppressed the
> emulation of these instructions.

What changed is that emulation of these instructions was deliberately
removed ;-)

This was done for dll separation reasons, and because they are not
emulated under NT either (which also means better performance for the
exception handling). What happens if you run with Windows version set
to NT?

[Lionel Ulmer]

On Sat, Oct 11, 2003 at 05:42:49PM -0700, Alexandre Julliard wrote:
> What changed is that emulation of these instructions was deliberately
> removed ;-)

I should have guessed that they were sacrified due to the DLL separation :-)
> This was done for dll separation reasons, and because they are not
> emulated under NT either (which also means better performance for the
> exception handling). What happens if you run with Windows version set
> to NT?

Well, now that you say it, when I tested the demo for Tomb Raider 3 on Win2K
(to check some slight graphical corruptions), it crashed at start-up... So
the game does not even check for Windows version before doing its hacks.

Let's hope we do not have many such broken apps out there...

Lionel

[Mike Hearn]

On Sun, 2003-10-12 at 09:17, Lionel Ulmer wrote:
> Well, now that you say it, when I tested the demo for Tomb Raider 3 on Win2K
> (to check some slight graphical corruptions), it crashed at start-up... So
> the game does not even check for Windows version before doing its hacks.
>
> Let's hope we do not have many such broken apps out there...

We lost the ability to run some 9x only apps? Will we ever get back the
ability to emulate these instructions, I also have an app crashing
because of this (not tried emulating NT yet). I guess if this will
always be the case we should either emulate NT by default, or print some
slightly more helpful message than a debug printout.