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.
IIRC, CPUs used to use external memory manager chips. This isn't very
complicated if all you want is segmentation (either with or without
address space expansion). Context switches require writing the process
ID to the MMU chip.
However, if you are going to use an external MMU with a chip that uses
paged memory, this isn't going to work.
--
JRT
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