[sitkack]

This is a full system simulator with an emulated RISC-V CPU in under a 1000 lines of clean C, in two files, so you can include it basically any program (STB style FTW).

[mlindner]

I mean, any program can include any program, why go to the extra layer of doing it inefficiently?

[cnlohr]

It allows you to run it in a protected environment. Think scripting languages.