WASI custom files

[konsumer]

I am using WAMR_BUILD_LIBC_WASI and basic printf and stuff works.

I am making a game-engine that loads a zip file for all assets. It has a wasm file in it, that is the user's code, which I can read & run fine. I use physfs to make the host functions (load image, etc) work correctly, but I would like to expose this to WASI (so users can use regular WASI functions to read files in zip, directly.)

I don't see anything for preloading files, other than the directory-mounting stuff, and I really don't want to extract the files before running them.

In other hosts (like with emscripten on web, or with other web wasi-shims) I would preload the files (mapping fd numbers to file contents) or hook up the wasi_snapshot_preview1 functions directly to accessing the files. I can't figure out how to do it in WAMR. Ideally, I'd like to mostly use the existing/working LIBC_WASI and just hook into the part like "when the user tries to access a file, give them this from physfs instead." Is there a way to preload files, or even better access them directly on the fly, without having to extract them all?

My engine is here.