Linkable Loadable Extensions (LLEXT)

The LLEXT subsystem provides a toolbox for extending the functionality of an application at runtime with linkable loadable code.

Extensions are precompiled executables in ELF format that can be verified, loaded, and linked with the main Zephyr binary. Extensions can be manipulated and introspected to some degree, as well as unloaded when no longer needed.

• Configuration
• Building extensions
• Loading extensions
• Troubleshooting
• API Reference

Note

The LLEXT subsystem requires architecture-specific support. It is currently available only on RISC-V, ARM, ARM64, ARC (experimental) and Xtensa cores.