[PATCH 0/3] MR260: ntdll: Improve xstate validation in NtGetContextThread()

[Paul Gofman (＠gofman)]

Supposed to fix SCP: Secret Laboratory intermittent crash at main menu.

The first two patches make the existing validation also work for other thread context query (as context_from_server called through get_thread_context() doesn't do that).

The last patch adds xstate alignment validation with corresponding test.