Executing privileged code in a process
US10796008B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2017 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Aug 21, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2141
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for executing privileged code in a process are described. The method includes establishing, by an authorized library, a privileged function. The privileged function has a first privilege level used by a processor that is executing the privileged function, while preserving a different privilege level for a process invoking the privileged function. The method includes communicating, to a computer process, access information of the privileged function, to allow the computer process to invoke the privileged function. The method includes executing the privileged function for the computer process. Executing the privileged function includes setting a processor that is being used by the computer process to use the first privilege level associated with the privileged function, executing the privileged function with that processor at the first privilege level, then restoring that processor to a previous privilege level, and returning control of that processor to the computer process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.