add rust kernel stub

nix/pkgs/bootle.nix

@@ -0,0 +1,63 @@
+{
+  callPackage,
+  rust-bin,
+  naersk,
+  bootler,
+  qemu,
+  ...
+}: let
+  rust-toolchain = rust-bin.fromRustupToolchainFile ../../rust-toolchain.toml;
+  naersk' = callPackage naersk {
+    cargo = rust-toolchain;
+    rustc = rust-toolchain;
+    clippy = rust-toolchain;
+  };
+in (naersk'.buildPackage {
+  src = ../../.;
+
+  # deps for rust-src
+  additionalCargoLock = "${rust-toolchain.availableComponents.rust-src}/lib/rustlib/src/rust/library/Cargo.lock";
+
+  # just library build
+  copyBins = false;
+  release = true;
+
+  # build std
+  cargoBuildOptions = x: x ++ ["-Zbuild-std=core,compiler_builtins,alloc" "-Zbuild-std-features=compiler-builtins-mem"];
+
+  postInstall = ''
+    ld --oformat binary \
+      -o kernel.bin \
+      -T src/linker.ld \
+      -e _start \
+      target/x86_64-unknown-none/release/libbootle.a
+
+    dd if=/dev/zero of=disk bs=512 count=2
+    dd if=${bootler}/bin/boot.bin of=disk conv=notrunc
+    dd if=kernel.bin of=disk bs=512 seek=1 conv=notrunc
+
+    mkdir -p $out/lib
+    mkdir -p $out/bin
+
+    cat<<EOF>$out/bin/bootle
+    #!/usr/bin/env bash
+
+    mkdir -p ./.bootle
+    cp $(echo $out)/bin/disk ./.bootle/disk
+    chmod a+w ./.bootle/disk
+
+    ${qemu}/bin/qemu-system-x86_64 \
+      -nographic \
+      -drive file=./.bootle/disk,format=raw,index=0,media=disk
+
+    rm ./.bootle -r
+
+    EOF
+
+    chmod +x $out/bin/bootle
+
+    cp target/x86_64-unknown-none/release/libbootle.a $out/lib
+    cp kernel.bin $out/bin
+    cp disk $out/bin
+  '';
+})

nix/pkgs/bootler.nix

@@ -0,0 +1,49 @@
+{
+  stdenv,
+  nasm,
+  qemu,
+  ...
+}: let
+  bootImg = "boot";
+in
+  stdenv.mkDerivation {
+    pname = "bootler";
+    version = "0.1.0";
+    src = ../../.;
+    buildPhase = ''
+      ${nasm}/bin/nasm asm/boot.asm -o boot.bin
+      ${nasm}/bin/nasm asm/kernel.asm -o dummy.bin
+
+      dd if=/dev/zero of=${bootImg} bs=512 count=2
+      dd if=boot.bin of=${bootImg} conv=notrunc
+      dd if=dummy.bin of=${bootImg} bs=512 seek=1 conv=notrunc
+    '';
+    installPhase = ''
+      mkdir -p $out/bin
+      cp boot.bin $out/bin
+      cp dummy.bin $out/bin
+      cp ${bootImg} $out/bin
+
+      # create emulation binary
+      cat<<EOF>$out/bin/bootler
+      #!/usr/bin/env bash
+
+      # create temp dir
+      mkdir -p ./.bootler
+      cp $(echo $out)/bin/${bootImg} ./.bootler/${bootImg}
+      chmod a+w ./.bootler/${bootImg}
+
+      # run image
+      ${qemu}/bin/qemu-system-x86_64 \
+        -nographic \
+        -drive file=./.bootler/${bootImg},format=raw,index=0,media=disk
+
+      # clean up
+      rm ./.bootler -r
+
+      EOF
+
+      chmod +x $out/bin/${bootImg}
+      chmod +x $out/bin/bootler
+    '';
+  }