This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down list at the bottom of the left panel and select the desired version.

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 ARM and Xtensa cores.