feat(adapter): init+storage packed into kernel image; drop adapter FAT16 reader + virtio-blk

crates/adapter-riscv/build.rs

@@ -1,5 +1,26 @@
+use std::path::PathBuf;
+
 fn main() {
     let ld = std::path::Path::new("linker.ld").canonicalize().unwrap();
     println!("cargo:rustc-link-arg=-T{}", ld.display());
     println!("cargo:rerun-if-changed=linker.ld");
+
+    // Init and storage are packed into the kernel image: they are what
+    // reads the disk, so they cannot come from it. `make build` builds them
+    // first; without them the image boots to "init missing".
+    let manifest = PathBuf::from(std::env::var("CARGO_MANIFEST_DIR").unwrap());
+    let bins = manifest.join("../../target/riscv64gc-unknown-none-elf/release");
+    let out = PathBuf::from(std::env::var("OUT_DIR").unwrap());
+    for (var, bin) in [("KOS_INIT_ELF", "init"), ("KOS_STORAGE_ELF", "storage-qemu")] {
+        let path = bins.join(bin);
+        println!("cargo:rerun-if-changed={}", path.display());
+        let path = if path.is_file() {
+            path
+        } else {
+            let empty = out.join(bin);
+            std::fs::write(&empty, []).unwrap();
+            empty
+        };
+        println!("cargo:rustc-env={}={}", var, path.display());
+    }
 }