[PATCH] Simple NX lowmem mappings

[Kees Cook]

Hi,

Thanks for starting this work!

Russel said:
> -#define MT_MEMORY      9
> [...]
> + MT_MEMORY,
> + MT_MEMORY_NX,

Instead of these names, let's more fully describe the protections. "NX"
doesn't say anything about RO vs RW. Instead, how about:

MT_MEMORY_RWX (to replace MT_MEMORY)
MT_MEMORY_RW  (as the new "NX" in use for this patch)

for the first change? Then as we move forward, we can add:

MT_MEMORY_R

At which point we'll have the three states.

-Kees

-- 
Kees Cook                                            @outflux.net