Vondehi is an in-memory unpacker for data compressed with
xz in LZMA1-mode). It basically performs these steps:
memfd_createsyscall. This file descriptor works like a regular file, except the backing storage is RAM.
xzcat, which outputs everything to the memfd from step 1.
execveaton the memfd.
Of course, the code itself is hand-optimized x86 assembly, and is very crazy.