A comprehensive open-source project has reverse-engineered Apple's Rosetta 2 binary translation technology, enabling x86_64 applications to run on ARM64 Linux systems. The repository contains detailed documentation and C implementations of Rosetta 2 functions, providing unprecedented insight into Apple's sophisticated translation engine.

The project emerged from Apple's 2020 transition to Apple Silicon, which required Rosetta 2 to maintain compatibility with existing Intel-based software. Through careful analysis of Rosetta 2 binaries, researchers have mapped out the technical architecture, including Ahead-of-Time compilation, Just-in-Time translation, and complex instruction set mapping between x86_64 and ARM64 architectures.

This reverse-engineering effort documents how Rosetta 2 handles critical challenges like register mapping between x86_64's 16 general-purpose registers and ARM64's 31 registers, memory ordering differences between architectures, and vector instruction translation from SSE/AVX to NEON. The project provides educational value for understanding binary translation techniques and practical implementations that could enable Linux systems to run x86_64 applications through similar translation mechanisms.