[xine-devel] Combatting RCE (Was: Re: [xine-user] recommend a dvd-drive)

[KAY R. <kom...@my...>]

> Once dvdnav plays all the DVDs out there well, I might start looking at
> holistic instruction group analysis to filter out RCE instructions.
> The problem is that as the RCE is done with instructions, there are
> hundreds of combinations of instructions which can be used to check RCE.

g[0-15] = VM registers
grce[0-15] = RCE combat flags

On VM init -> grce[0-15] = 0
If g[x] is loaded with the region -> grce[x] = 1
If g[x] is loaded with a constant -> grce[x] = 0
If g[x] is loaded with g[y] -> grce[x] = grce[y]
If g[x] is compared with a constant and grce[x] == 1 -> Always return true

I would imagine that this would stop any current attempt at RCE (unless they
had circumvention in mind). What do you think?

--
Wishing you good fortune,
--Robin Kay-- (komadori)