[PATCH] ntdll: Catch page fault in RtlWow64EnableFsRedirectionEx

[André Hentschel]

Am 04.08.2016 um 19:05 schrieb Matt Robinson:
> Previously, RtlWow64EnableFsRedirectionEx only returned
> STATUS_NOT_IMPLEMENTED if the old_value pointer started with 0x0000, and
> would cause an unhandled page fault if an invalid handle not starting
> with 0x00 was passed.  However, Windows seems to catch page faults when
> accessing old_value and returns STATUS_ACCESS_VIOLATION.
>
> This adds a test to confirm the behaviour and then wraps the access to
> old_value in an exception handler.
>
> Fixes https://bugs.winehq.org/show_bug.cgi?id=41066
>
> Signed-off-by: Matt Robinson <git at nerdoftheherd.com>

Signed-off-by: André Hentschel <nerv at dawncrow.de>