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:
Jun. 27, 2017
Filed:
Jun. 12, 2009
Neil William Stewart, Glasgow, GB;
Graeme Kerr Harkness, Edinburgh, GB;
Douglas Mcpherson Little, Glasgow, GB;
Neil William Stewart, Glasgow, GB;
Graeme Kerr Harkness, Edinburgh, GB;
Douglas McPherson Little, Glasgow, GB;
Metaforic Limited, Glasgow, GB;
Abstract
Program code is modified to execute correctly only when code and data memory accesses/fetches are synchronised, i.e. data and code accesses/fetches are routed to identical physical addresses in computer memory. This indirectly defeats the MMU attack, in which code and data memory accesses/fetches to the same logical address are routed to different physical addresses. The program code is modified such that one or more sections of the code ('repair targets') are deliberately broken so that the program code will not execute correctly, the repair targets being replaced at run time with correct code before the repair targets are executed.