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:
May. 21, 2019
Filed:
Jan. 25, 2016
Hewlett-packard Development Company, L.p., Houston, TX (US);
Wei Ze Liu, Houston, TX (US);
Jeffrey Kevin Jeansonne, Houston, TX (US);
Dallas M Barlow, Tomball, TX (US);
Hewlett-Packard Development Company, L.P., Spring, TX (US);
Abstract
A method of protecting basic input/output system (BIOS) code. The method includes, with a relocation information tool executed by a processor, refactoring a number of data sections within a number of handlers of the BIOS code to tag a number of variables within the handlers. The tags indicate which of the variables should be protected at runtime. The method further includes generating a relocation file comprising a number of relocation addresses identifying locations of a number of dynamic variables that change at runtime. The relocation addresses point to a location within the handlers different from an original location. The method further includes, with a loader, loading at runtime the relocation file as part of a BIOS firmware image and adjusting data access to the dynamic variables in handler code to identify the location of the dynamic variables based on the relocation file.