Appears in the Proceedings of the 6th International Conference on Architectural Support for
Traditional methods of providing. This paper examines guarded pointers, a hardware technique which uses tagged 64-bit pointer objects to implement capability-based addressing. Guarded pointers encode a segment descriptor into the upper bits of every pointer, eliminating the indirection and related p...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.12.5725 http://www.cs.utexas.edu/users/skeckler/pubs/asplos94.pdf |
| Summary: | Traditional methods of providing. This paper examines guarded pointers, a hardware technique which uses tagged 64-bit pointer objects to implement capability-based addressing. Guarded pointers encode a segment descriptor into the upper bits of every pointer, eliminating the indirection and related performance penalties associated with traditional implementations of capabilities. All processes share a single 54-bit virtual address space, and access is limited to the data that can be referenced through the pointers that a process has been issued. Only one level of address translation is required to perform a memory reference. Sharing data between processes is efficient, and protection states are defined to allow fast protected subsystem calls and create unforgeable data keys. |
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