NDLI: LOCS: a low overhead profiler-driven design flow for security of MPSoCs

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LOCS: a low overhead profiler-driven design flow for security of MPSoCs

Content Provider	ACM Digital Library
Author	Patel, Krutartha Parameswaran, Sri
Abstract	Security is a growing concern in processor based systems and hence requires immediate attention. New paradigms in the design of MPSoCs must be found, with security as one of the primary objectives. Software attacks like Code Injection Attacks exploit vulnerabilities in "trusted" code. Previous countermeasures addressing code injection attacks in MPSoCs have significant performance overheads and do not check every single line of code. The work described in this paper has reduced performance overhead and ensures that all the lines in the program code are checked. We propose an MPSoC system where one processor (which we call a MONITOR processor) is responsible for supervising all other application processors. Our design flow, LOCS, instruments and profiles the execution of basic blocks in the program. LOCS subsequently uses the profiler output to re-instrument the source files to minimize runtime overheads. LOCS also aids in the design of hardware customizations required by the MONITOR. At runtime, the MONITOR checks the validity of the control flow transitions and the execution time of basic blocks. We implemented our system on a commercial extensible processor, Xtensa LX2, and tested it on three multimedia benchmarks. The experiments show that our system has the worst-case performance degradation of about 24% and an area overhead of approximately 40%. LOCS has smaller performance, area and code size overheads than all previous code injection countermeasures for MPSoCs.
Starting Page	79
Ending Page	84
Page Count	6
File Format	PDF
ISBN	9781605584706
DOI	10.1145/1450135.1450154
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2008-10-19
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Execution profile Architecture Mpsoc Code injection Tensilica
Content Type	Text
Resource Type	Article

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