Other

John David Kubiatowicz

Daniel Shawcross Wilkerson

In accordance with one embodiment, additions to the standard computer microprocessor architecture hardware are disclosed comprising novel page table entry fields, special registers, instructions for modifying these fieldsand registers, and hardware-implementedruntime checks and operations involving these fields and registers. More specifically, in the above embodiment of a Hard Object system, there is additional meta-datain each page table entry beyond what it commonly holds, and each time a data load or store is issued from the CPU, and the virtual addresstranslated to the physical address, the Hard Object system uses its additional PTE meta-datato perform memory access checks additional to those done in current systems. Together with changes to software, these access checks can be arranged carefully to provide more fine-grain access control for data than do current systems.

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Pleasant Hill, CA, United States of America

John David Kubiatowicz