Leave it as an exercise to the reader.

I mean, "demos that shouldn't be shared" from the root comment implies that it isn't done, right?

I'm effectively lying to the kernel about the environment it's executing in, and trying to convince it that it's running on the kind of hardware it expects, when in reality it's running inside a very different environment.

Since I map guest threads 1:1 to host threads in JS, and architecture-specific code manages the loading/unloading of programs, the exec syscall is exercising these lies in a way that they're not currently equipped to handle.

What I'm currently doing is improving those lies to the point where exec stops noticing they're lies and just starts functioning as expected.