udynlink is a dynamic linker for ARM Cortex-M MCUs. It compiles code into a binary blob that can be loaded and executed at runtime on the MCU. The binary blob can be either loaded into RAM or executed directly from the flash memory (execute in place). The dynamic linker can be used for various purposes, such as:

• Use code that can run only from RAM (for example, code that manipulates the internal MCU flash memory, like a bootloader).
• Speed up the execution of some of your code by running it from RAM instead of Flash.
• Apply partial patches to your application (replace a part of the code by dynamically loading a newer version of that code).
• Implement loaders for modules written in C for higher-level languages (like Lua, Python or JavaScript).

See more in the project GitHub repo.