Kirn Gill has ported the Brainfuck language’s interpreter to UEFI!
https://github.com/segin/efibrainfuck
https://en.wikipedia.org/wiki/Brainfuck
So we have another language option for pre-OS scripting. And something else to look for when searching the UEFI’s ESP (EFI System Partition) for security threats: also look for Brainfuck scripts (and the interpreter), in addition to Python, Lua, Ruby, etc. scripts.
It is built with GNU-EFI, not Tianocore’s EDK-II.

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