Green Threads for UEFI: This project is a an alpha version of “green” threads for UEFI. It’s not really like Linux green threads as there is no distinction between user space and kernel space but the different threads are running on the same core
This C-based project has a bit of Intel-centric assembly language code.
Wikipedia defines “Green Threads” as: “threads that are scheduled by a runtime library or virtual machine (VM) instead of natively by the underlying operating system. Green threads emulate multithreaded environments without relying on any native OS capabilities, and they are managed in user space instead of kernel space, enabling them to work in environments that do not have native thread support.”
Firmware Security 