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SCM Command Structures
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Reflections on Trusting TrustZone
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- 1 Intro
- 2 What is TrustZone?
- 3 TrustZone Architecture
- 4 Real-World Uses
- 5 Prior Work
- 6 Motivation
- 7 Toolchain
- 8 Attack Surface
- 9 Attacker Assumptions
- 10 QSEE SCM Interface
- 11 SCM Call-by-Register Convention
- 12 SCM Command Structures
- 13 Structure Sanity Checking
- 14 Secure Memory Checking Pseudocode
- 15 Review: Integer Overflow
- 16 Integer Overflow Vulnerability
- 17 Pathological Command Buffer
- 18 What is Written to Response Header?
- 19 Sorcery!
- 20 Building Better Primitives
- 21 Choosing A New Write Primitive
- 22 SMC Handler Table
- 23 SMC Table Extension Attack
- 24 Arbitrary TZ Code Execution
- 25 Lessons Learned
