Similarly, protection is guaranteed if identifiers are not duplicated. If two processes duplicate an identifier in their segment registers, they share that virtual segment by definition. The architecture does not use explicit address-space identifiers the segment registers ensure address space protection. ![]() ![]() The segments provide address space protection and can be used for shared memory. It is this extended virtual address that is mapped by the TLB and page table. ![]() Processes generate 32-bit effective addresses that are mapped onto a 52-bit address space via 16 segment registers, using the top 4 bits of the effective address as an index.
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