If we are unable to migrate all C code before the end of the project, can we do that strategically?

Goal: call from rust into the remaining C code without the C code calling back out into rust again.

• If we get close to this, we can identify what C code calls back into rust and tartget that for migration to rust.

shim helper crate(s)

• rename shadow-shim-helper-rs -> shadow-util. consider moving main/util functions there

Are there any important syscalls currently missing?

• sigtimedwait
• UNIX pathname sockets, but it requires file system overlay, so we deferred
• sendmsg/recvmsg