Module kernel 

We have three goals for our error shims:

• preserve upstream error numbers.
• preserve upstream error messages.
• allow matching on specific errors.

There are a couple of things that make this difficult:

• fvm_shared*::error::ErrorNumber is #[non_exhaustive]

We have designed with the following assumptions about the fvm* crates:

• new error variants are append-only
• error messages are consistent between crates

Macros

error_number 🔒

Structs

SyscallError

Enums

ErrorNumber