[i336_]

I'm not sure if this will be relevant or useful information, but I understand that a GSoC project added Lua to SYSLINUX. I'm not sure what the specifics of the memory access/stack structure is; the idea is to let you run Lua scripts directly in your bootloader, and it can also open an interactive REPL.

Strangely, the effort was made to get Lua functioning, but not much has been practically done with it. Stuff like VESA support was even thrown around, but the whole thing was eventually abandoned(?!).

I see so many possibilities for something like this, generally speaking... and FYI, the code does apparently work.