The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 2021
Filed:
Dec. 21, 2016
Vmware, Inc., Palo Alto, CA (US);
Andrei Warkentin, Cambridge, MA (US);
Cyrien Laplace, Cambridge, MA (US);
Alexander Fainkichen, Southborough, MA (US);
Ye Li, Newton, MA (US);
Regis Duchesne, Monts-de-Corsier, CH;
VMware, Inc., Palo Alto, CA (US);
Abstract
Examples construct a bootloader address space using a page fault exception. A bootloader executing in machine address (MA) space determines the MA at which the bootloader has been loaded into memory. The bootloader calculates a difference between an expected virtual address (VA) and the loaded MA. The bootloader defines a page table mapping the bootloader MA to an expected VA, and sets an exception handling vector to point to the expected VA. When a memory management unit (MMU) utilizing the defined page table for address translation is enabled, a page fault exception occurs. The page fault exception handling resumes execution of the bootloader at the expected VA via an exception handling vector pointing thereto.