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InfoResearchPeer-reviewed

FLEX: Flexible Linked EXecution for Real-Time Embedded Hotpatching

Source
IEEE Xplore (Security & AI Journals)(opens in a new tab)
Published
Record updated

Summary

The paper proposes Flexible Linked EXecution (FLEX), a hotpatching technique for real-time embedded systems that avoids reboots. FLEX redirects function calls and global variable accesses through a compile-time generated Control Flow Table (CFT) and applies updates with a double-buffered pointer swap. In experiments it showed about 11% average execution overhead and roughly 17% more flash memory usage.