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:
Sep. 12, 2017
Filed:
Jun. 06, 2013
Applicant:
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Inventors:
Yasuhiro Ito, Tokyo, JP;
Yasuo Sugure, Tokyo, JP;
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 11/00 (2006.01); G06F 11/263 (2006.01); G06F 11/22 (2006.01); G06F 11/26 (2006.01);
U.S. Cl.
CPC ...
G06F 11/263 (2013.01); G06F 11/22 (2013.01); G06F 11/2236 (2013.01); G06F 11/26 (2013.01); G06F 11/261 (2013.01);
Abstract
Temporary fault injection to existing hardware is performed using only software without changing an implementation of the hardware. A fault injection interrupt process starts on an operation of a CPU using an interrupt that is not used by software, and an internal state of hardware is updated to the same value as a result obtained when a fault has occurred during the interrupt process. A clock of the CPU during the interrupt process is accelerated so that a period of time of the interrupt process is smaller than a period of time until a fault becomes effective.