[Bug 40620] Unhandled exception: page fault on read access to 0x00000001 in 32-bit code (0x00422056).

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40620

Michael Müller <michael at fds-team.de> changed:

           What    |Removed                     |Added
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                 CC|                            |michael at fds-team.de

--- Comment #1 from Michael Müller <michael at fds-team.de> ---
Have you tested the application on Windows? I don't think it can work on
Windows this way.

My guess is that this is an application bug, but it is a bit hard to tell
without the source code. The crash happens in your runPE::run function. You try
to check if the the passed buffer (second parameter) starts with MZ. You
implemented the comparison using a short or WORD as data type and therefore you
need to cast the pointer to a WORD* or short* pointer. Judging from the
assembler code, you do not only cast the pointer but also cast the value of the
pointer, i.e. you remove the higher 16 bits from the address. The address is
therefore invalid and it will crash.

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