NOVA: Capability selectors cause call of invalid portal

Alexander Boettcher alexander.boettcher at ...1...
Tue Jul 31 09:51:06 CEST 2012


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Sorry,

I forgot to mention that the described limits of course apply only to
the 32bit version of the kernel interface. For 64bit the limits are
different.

Alex.

On 31.07.2012 09:33, Alexander Boettcher wrote:
> the kernel does only support cap selectors up to 1 << 24 (which is 
> 0x1000000), however selectors only up to 1 << 20 (which is
> 0x100000) as base can be mapped/delegated. (There are only 20 bit
> available for the base of the capability range descripter, see also
> the NOVA kernel specification, section - 4.3.4 Object Capability
> Range Descriptor).
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