[Bug 11570] New: VDMSound crashes with illegal instruction

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=11570

           Summary: VDMSound crashes with illegal instruction
           Product: Wine
           Version: CVS/GIT
          Platform: Other
               URL: http://sourceforge.net/project/showfiles.php?group_id=20
                    091
        OS/Version: other
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: dos
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: chris.kcat at gmail.com


Created an attachment (id=10741)
 --> (http://bugs.winehq.org/attachment.cgi?id=10741)
Trace log and backtrace of crash

VDMSound is used on NT-based Windows systems for emulating audio cards (digital
and midi) for DOS apps. Trying to run the provided dosdrv.exe results in an
illegal instruction when trying to load vddloader.dll. The instruction it seems
to crash on is

popl %gs

in the vm86_[enter|return] assembly functions (in ntdll/signal_i386.c).

I have an AMD X2 4200+ CPU which is a 64-bit CPU, however I'm running a full
32-bit system (32-bit Linux kernel and all; nothing 64-bit). I should also
probably note that the app I'm trying to run through VDMSound (Daggerfall) does
not crash with an illegal instruction, but complains that it can't run under
Windows 3.1, and exits. VDMSound is supposed to help allow the game to run
under real Win2k/XP.

Attached is a +all,-gdi,-syslevel,-heap winedebug trace, along with the winedbg
dump at the very end. You can search for "code=c000001d" to find the point
where it crashes. For some reason, some of the threads' traces in the log get
intermingled at points, and I can't seem to help it much.


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