[Bug 58997] New: Page fault crash in experimental WOW64 mode on ARM64 when running D3D8 game with DXVK

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58997

Bug ID: 58997
           Summary: Page fault crash in experimental WOW64 mode on ARM64
                    when running D3D8 game with DXVK
           Product: Wine-staging
           Version: 10.18
          Hardware: aarch64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

Created attachment 79719
  --> http://bugs.winehq.org/attachment.cgi?id=79719
the log file when wine wrapgame.exe

Environment:
- Hardware: Apple M1 Mac Mini (ARM64/aarch64)
- OS: Fedora Asahi Remix 43 (Linux kernel 6.16.8-400.asahi.fc43.aarch64+16k)
- Wine: wine-staging 10.18
- DXVK: 2.7.1
- Application: Shark Attack (Direct3D 8 game via wrapgame.exe)

Issue:
Game consistently crashes with page fault at address 7FFFFFF0 immediately after
Direct3D device initialization when running in Wine's experimental WOW64 mode
on ARM64.

Steps to reproduce:
1. Install wine-staging 10.18 on ARM64 system
2. Install DXVK 2.7.1 (winetricks dxvk)
3. Run any Direct3D 8 application

Expected behavior:
Game should run in WOW64 mode

Actual behavior:
Unhandled page fault on write access to 7FFFFFF0

Notes:
- DXVK successfully initializes and reports "D3D9 interface is now operating in
D3D8 compatibility mode"
- Device creation completes successfully
- Crash occurs right after swapchain creation
- Error is consistent across multiple launch attempts
- Wine correctly identifies this as experimental WOW64 mode

Attachment contains full crash log with debugger output.