Rogelio Serrano wrote:
On 4/12/07, Hamie <[EMAIL PROTECTED]> wrote:
On Thursday 12 April 2007 10:12, Rogelio Serrano wrote:
> sorry to ask but i dont know where to go.
>
> im looking for a 64 bit processor with segmented memory support. im
> working on a no kernel os and the prototype is running on a 32 bit
> processor. the problem is there is not enough memory space to have
> very strong address randomization. unfortunately the x86_64 arch does
> not have segmentation in long mode.
>
> maybe the only option is an fpga based processor.
Why do you want segmented specifically?
i use segmentation to protect shared data and code from other
processes. this allows service calls without using traps. and it makes
zero copy io and ipc very easy.
Segmentation is normally used to expand or virtualize the memory space.
If all you need is protection, paged memory should do that since pages
are owned by one process and protected from access by other processes
with the same privilege level.
--
JRT
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