* pm:shell now has a new command (9), which currently just does abort(). However, it looks like in a future update it will return an event handle of some kind.
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* pm:shell now has a new command (9), which does abort() in normal FIRM. However, when in safe mode, it returns a handle to an event that is signaled on IShellService->NotifyBootFinished(), before the embedded safemode boot2 runs.