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Automated Discovery, Classification, and Systematic Security Verification Methodology for Undocumented Instructions
DescriptionUndocumented instructions pose a growing security threat, yet current research is limited.
Existing work focuses on discovery with constrained techniques, while semantic analysis is manual and ad-hoc. Moreover, a significant gap exists in methodologies for systematic security verification. This paper presents a comprehensive framework for the automated discovery, systematic classification, and security verification of undocumented instructions. Our evaluation discovered 23 new instructions and classified 29 using a classifier with 99.8357% accuracy. Most importantly, we verified that 5 instructions have tangible security implications, demonstrating our approach's efficacy in addressing threats at the processor instruction level.