Memory Safe Inline Assembly
a day ago
- #Inline Assembly
- #Memory Safety
- #Fil-C
- Fil-C introduces memory-safe inline assembly, ensuring memory safety while allowing inline assembly usage.
- Supports safe inline assembly instructions like cpuid, xgetbv, and arithmetic operations used in crypto for constant-time implementations.
- Runtime error handling: unsafe inline assembly leads to a panic, and unsupported instructions cause an illegal instruction trap.
- Implementation involves parsing assembly strings and constraints, validating safety, and maintaining a database of allowed instructions.
- The feature was developed using an AI-assisted loop to iteratively implement and test hundreds of pre-AVX512 x86_64 instructions.