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Quote: use page protection to provide access to shared libraries from user-level extensions; data/function pointers stay the same; applications control which pages are accessible
Topic:
memory management by paging
Topic:
managing shared memory
Topic:
extensible systems
Quotation Skeleton
User-level extensions need to share with the main … [p. 113] Instead of segmentation protection hardware, we use … converts itself to SPL2 through a system call, … [User-level extensions run in a user-level extension segment at SPL 3 and PPL 1.] In addition, the PPL of any pages … memory regions, is set to 1. … user-level extensions can never access pages that the … paging hardware prevents [an] SPL 3 code segment … space range as the extension segment, relocation supported … without modifications, thus greatly facilitating code/data sharing. Google-1 Google-2
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Topic: memory management by paging (23 items)
Topic: managing shared memory (74 items)
Topic: extensible systems (22 items)