[Bug 49698] Unwinding with a PE based ntdll.dll fails in some cases

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49698

--- Comment #1 from Paul Gofman <pgofman at codeweavers.com> ---
Thanks for bringing in handy test case.

I've tested the test.

The regression was triggered solely by ntdll switch to PE and does not
interfere with any other patches.

The problem is in dlls/ntdll/signal_x86_64.c:call_consolidate_callback()
function.
It is supposed to return to the caller (RtlSetThreadContext) in case of normal
return but in case if the callback unwinds (which is likely) the unwind should
jump directly to the specified context and skip all the functions in between
with their unwinds (that is the feature of consolidated unwind which does the
unwind for multiple nested frames in one call). The required tricks were
implemented with dwarf unwind info but not for PE unwinds, thus it was broken
as soon as ntdll.dll is build as PE.

Patches [1], [2] are fixing the issue for me.

1. https://source.winehq.org/patches/data/190692
2. https://source.winehq.org/patches/data/190693

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