Memory Safe Inline Assembly
Summary
This article explains Fil-C's approach to memory-safe inline assembly, detailing why safe inline assembly is possible, how safety instrumentation validates assembly strings and constraints, and the initial implementation and testing roadmap. It covers motivations for inline assembly, examples of safe usage, and the runtime safety model where unsafe code leads to panics or illegal instruction traps. The piece emphasizes a test-driven path and future work to expand the allowlist and error checking.