ableos-idl/ableos/src/wasm_jumploader/mod.rs

pub mod host_functions;

extern crate wasmi;
// extern crate wabt;

use genfs::{Fs, OpenOptions};
use wasmi::{ImportsBuilder, ModuleInstance};

use crate::{filesystem::FILE_SYSTEM, wasm_jumploader::host_functions::HostExternals};

pub fn interp() {
    trace!("Interpreting...");
    let fs = &*FILE_SYSTEM.lock();
    trace!("Got filesystem");
    let file = fs
        .open(
            b"/home/able/bins/aos_wasm_stress_test.wasm",
            OpenOptions::new().read(true),
        )
        .unwrap();

    let mut wasm_binary = Vec::new();

    let ret = file.read_to_end(&mut wasm_binary).unwrap();
    trace!("Binary size {}", ret);
    // Load wasm binary and prepare it for instantiation.
    let module = wasmi::Module::from_buffer(&wasm_binary).expect("failed to load wasm");

    let imports = ImportsBuilder::new().with_resolver("env", &host_functions::HostExternals {});

    // Instantiate a module with empty imports and
    // assert that there is no `start` function.
    let instance = ModuleInstance::new(&module, &imports)
        .expect("failed to instantiate wasm module")
        .assert_no_start();

    let ret = instance
        .invoke_export("start", &[], &mut HostExternals {})
        .expect("failed to execute export");

    println!("collected wasm return value: {:?}", ret);
}