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:
Jan. 09, 2024
Filed:
Mar. 12, 2019
Huawei Technologies Co., Ltd., Shenzhen, CN;
Jan-erik Ekberg, Helsinki, FI;
Jan-Erik Ekberg, Helsinki, FI;
HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, CN;
Abstract
An apparatus includes a processor coupled to a memory. The processor calls a second function from a first function by coloring with an inaccessible color value a first memory area associated with the first function, branching to the second function, coloring with a second color value a second memory area associated with the second function, operating on the second memory area, and coloring with the inaccessible color value the second memory area. The processor then returns control to the first function, and colors with a first color value the first memory area. The coloring step includes branching to a coloring routine that includes a basic block beginning with a single branch target instruction, identifying and authorizing the calling routine, coloring with a hardcoded color value a memory area associated with the calling routine, and returning to the calling routine.