New subject: [Bug 54290] RtlAddFunctionTable does not work for modules with empty IMAGE_DIRECTORY_ENTRY_EXCEPTION

11 Jan 2023

      https://bugs.winehq.org/show_bug.cgi?id=54290

            Bug ID: 54290
           Summary: RtlAddFunctionTable does not work for modules with
                    empty IMAGE_DIRECTORY_ENTRY_EXCEPTION
           Product: Wine
           Version: 7.22
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: wine-bugs(a)winehq.org
          Reporter: novae.harpist06(a)icloud.com
      Distribution: ---

Created attachment 73859
  --> https://bugs.winehq.org/attachment.cgi?id=73859
Reproducer

RtlAddFunctionTable is generally called for code allocated by JIT engines and
similar, however on Windows it also works for images, as long as the image has
an empty IMAGE_DIRECTORY_ENTRY_EXCEPTION. This is sometimes used by packers.

On Wine, this does not work.

The problem is that dynamic entries are only enumerated if the memory does not
belong to an image:

https://github.com/wine-mirror/wine/blob/0adec25f92219b5626b8ee3c1c13396d36e...

Code that reproduces the issue is attached.

Windows output:

VirtualAddress: 00072000
hello!!!!

Wine output:

VirtualAddress: 00072000
wine: Unhandled exception 0x80000003 in thread 2a4 at address 0000000180001007
(thread 02a4), starting debugger...

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[Bug 54290] New: RtlAddFunctionTable does not work for modules with empty IMAGE_DIRECTORY_ENTRY_EXCEPTION

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