This is the `wasmtime-environ` crate, which contains the implementations
of the `ModuleEnvironment` and `FuncEnvironment` traits from
[`cranelift-wasm`](https://crates.io/crates/cranelift-wasm). They effectively
implement an ABI for basic wasm compilation that defines how linear memories
are allocated, how indirect calls work, and other details. They can be used
for JITing, native object files, or other purposes.