[RFC PATCH] uprobes: copy to user-space xol page with proper cache flushing

[David Miller]

From: David Long <dave.long at linaro.org>
Date: Tue, 15 Apr 2014 15:39:18 -0400

> Yes, I have that coded for 14 out of 24 architectures (the easy
> ones). The remaining ones need more work.  Some may prove problematic.
> The whole approach could yet prove impractical.  More recent suggested
> approaches may be better too (or Linus's relatively simple change).

BTW, another reason perhaps to write directly to userspace and have
a uprobes_*() specific interface is that you'll only need to do
3 architectures, the ones that support uprobes.

That way, this is just part of what every arch needs to implement in
order to support uprobes.