> On Aug 4, 2018, at 2:09 AM, Maxime Villard <m...@m00nbsd.net> wrote:
> 
> Regarding the DDB ifndef, probably there must be
> a bit in ARM64 saying "disable page protection", so it could be set when
> we enter DDB, and we could remove the ifndef.


It only matters when setting / removing breakpoints, so it seems like you want 
to defer changing page protection right until then.

Even if there's not a single bit that will do it (I honestly don't know), why 
not just fiddle with the L2 descriptor directly?

-- thorpej

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