Open Source Summit Korea 2026

Running unmodified x86-64 binaries on ARM64 and RISC-V Linux systems remains important, but existing solutions often involve high overhead or depend on platform-specific hardware. Box64 addresses this gap with a wrapping-first architecture that prioritizes native execution by routing calls into host libraries through ABI translation, while reserving JIT compilation for guest code that cannot be directly mapped.

This session presents the core design of Box64 in three parts. First, a native wrapping layer that spans hundreds of libraries, handling entry-point interception and callback bridging. Second, a multi-pass JIT compiler that applies optimizations such as flag liveness analysis and deferred flag computation. Third, system-level integration techniques that enable practical deployment, including container bypass, mixed-bitness coordination with Wine, and memory ordering support on weakly ordered architectures.

We will also share performance results on ARM64 and RISC-V platforms, showing how Box64 achieves near-native performance in favorable cases and significant speedups over traditional emulation approaches.