Invention Grant
- Patent Title: Page protection layer
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Application No.: US16564502Application Date: 2019-09-09
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Publication No.: US11188477B2Publication Date: 2021-11-30
- Inventor: Julien Oster , Thomas G. Holland , Bernard J. Semeria , Jason A. Harmening , Pierre-Olivier J. Martel , Gregory D. Hughes , P. Love Hornquist Astrand , Jacques Fortier , Ryan P. Nielson , Simon P. Cooper
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Agent Lawrence J. Merkel
- Main IPC: G06F12/1009
- IPC: G06F12/1009 ; G06F21/62 ; G06F9/455

Abstract:
In an embodiment, a computer system comprises a page protection layer. The page protection layer may be the component in the system which manages the page tables for virtual to physical page mappings. Transactions to the page protection layer are used to create/manage mappings created in the page tables. The page protection layer may enforce dynamic security policies in the system (i.e. security policies that may not be enforced using only a static hardware configuration). In an embodiment, the page protection layer may ensure that it is the only component which is able to modify the page tables. The page protection layer may ensure than no component in the system is able to modify a page that is marked executable in any process' address space. The page protection may ensure that any page that is marked executable has code with a verified code signature, in an embodiment.
Public/Granted literature
- US20200081847A1 Page Protection Layer Public/Granted day:2020-03-12
Information query
IPC分类: