add initial version of CI tests

Author: stlankes

.github/workflows/ci.yml

@@ -0,0 +1,93 @@
+name: CI
+
+on:
+  pull_request:
+  merge_group:
+  workflow_dispatch:
+
+env:
+  GH_TOKEN: ${{ github.token }}
+  RUSTDOCFLAGS: -Dwarnings
+
+jobs:
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-26.04
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          submodules: true
+          lfs: true
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+      - name: Clippy
+        run: |
+          cd mkinitrd 
+          cargo clippy
+          cd ..
+          ARCH=x86_64 make initrd.img
+          cd image
+          cargo clippy --target=x86_64-unknown-none -- -Dwarnings
+          cd ..
+          rm initrd.img
+          ARCH=aarch64 make initrd.img
+          cd image
+          cargo clippy --target=aarch64-unknown-none-softfloat -- -Dwarnings
+          cd ..
+          rm initrd.img
+          ARCH=riscv64 make initrd.img
+          cd image
+          cargo clippy --target=riscv64gc-unknown-none-elf --no-default-features --features loader,fork,kernel-stack,common-os -- -Dwarnings
+
+  format:
+    name: Format
+    runs-on: ubuntu-26.04
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          submodules: true 
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy rustfmt
+      - name: Format
+        run: |
+          cd mkinitrd
+          cargo fmt -- --check
+          cd ../image
+          cargo fmt -- --check
+
+  run-hermit:
+    name: Run
+    runs-on: ubuntu-26.04
+    strategy:
+      matrix:
+        arch: [x86_64, aarch64, riscv64]
+        profile: [dev, release]
+        include:
+          - arch: x86_64
+            packages: qemu-system-x86-hwe
+            flags: --accel --sudo
+          - arch: aarch64
+            packages: qemu-system-arm-hwe
+          - arch: riscv64
+            packages: qemu-system-riscv-hwe
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          submodules: true
+          lfs: true
+      - name: Install Packages
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends ipxe-qemu libcap-ng-dev libseccomp-dev ${{ matrix.packages }}
+      - name: Download loader
+        working-directory: ./image
+        run: gh release download --repo hermit-os/loader --pattern 'hermit-loader-${{ matrix.arch }}*'
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+      - name: Run boot-image
+        run: |
+          ARCH=${{ matrix.arch }} make run

image/.cargo/config.toml

@@ -6,15 +6,24 @@ build-std-features = ["compiler-builtins-mem"]
 target = "x86_64-unknown-none"
 
 [target.x86_64-unknown-none]
-runner = "qemu-system-x86_64 -display none -serial stdio -kernel hermit-loader-x86_64 -cpu Skylake-Client -device isa-debug-exit,iobase=0xf4,iosize=0x04 -smp 1 -m 2G -netdev user,id=u1,hostfwd=tcp::9975-:9975,hostfwd=udp::9975-:9975,net=192.168.76.0/24,dhcpstart=192.168.76.9 -device virtio-net-pci,netdev=u1,disable-legacy=on -monitor telnet:127.0.0.1:12345,server,nowait -initrd"
+runner = "qemu-system-x86_64 -display none -serial stdio -kernel hermit-loader-x86_64-multiboot -cpu Skylake-Client -device isa-debug-exit,iobase=0xf4,iosize=0x04 -smp 1 -m 2G -netdev user,id=u1,hostfwd=tcp::9975-:9975,hostfwd=udp::9975-:9975,net=192.168.76.0/24,dhcpstart=192.168.76.9 -device virtio-net-pci,netdev=u1,disable-legacy=on -monitor telnet:127.0.0.1:12345,server,nowait -initrd"
 
 [target.aarch64-unknown-none-softfloat]
 runner = "sh ./qemu-aarch64.sh"
-rustflags = ["-Clink-arg=--image-base=0x40400000"]
+# Link boot_image as a static PIE so the loader can place it anywhere in RAM.
+# The target spec does not enable static PIE, so `-pie` must be passed
+# explicitly; `-Crelocation-model=pic` alone still yields an ET_EXEC
+# linked at lld's default base (0x200000), which is outside of RAM.
+rustflags = [
+    "-Crelocation-model=pic",
+    "-Clink-arg=-pie",
+    "-Clink-arg=--no-dynamic-linker",
+    "-Clink-arg=-ztext",
+]
 
 [target.riscv64gc-unknown-none-elf]
 # Uses QEMU's bundled OpenSBI as the default -bios for the virt machine.
-runner = "qemu-system-riscv64 -machine virt -cpu rv64 -smp 1 -m 2G -display none -serial stdio -kernel hermit-loader-riscv64 -initrd"
+runner = "qemu-system-riscv64 -machine virt -cpu rv64 -smp 1 -m 2G -display none -serial stdio -bios /usr/lib/riscv64-linux-gnu/opensbi/generic/fw_jump.bin -kernel hermit-loader-riscv64-sbi -initrd"
 # RAM on the virt machine starts at 0x8000_0000; OpenSBI occupies the
 # first 512 KiB and the loader sits at 0x8020_0000. Link the kernel
 # image above both (the loader loads ELF segments at their link

image/kernel

@@ -4,7 +4,7 @@
 # because cargo invokes the runner with the working directory set there.
 exec qemu-system-aarch64 \
     -display none -serial stdio \
-    -kernel hermit-loader-aarch64 \
+    -kernel hermit-loader-aarch64-elf \
     -machine virt,gic-version=3 \
     -cpu max,lpa2=off \
     -semihosting \

image/qemu-aarch64.sh

@@ -1,6 +1,8 @@
 [toolchain]
 channel = "nightly-2026-09-01"
 components = [
+    "clippy",
     "llvm-tools",
     "rust-src",
+    "rustfmt",
 ]

image/rust-toolchain.toml

@@ -410,7 +410,7 @@ pub extern "C" fn main(_argc: i32, _argv: *const *const u8, _env: *const *const
 
 	info!("Start user-level process to initialize the HermitOS");
 
-	let app = c"/bin/fork".to_owned();
+	let app = c"/bin/pipe".to_owned();
 	let spawn_args = Box::new(SpawnArgs {
 		args: vec![app.clone()],
 		envs: Vec::new(),

image/src/main.rs

@@ -23,7 +23,9 @@ pub fn list(path: &Path) -> io::Result<()> {
 
 		println!(
 			"Found file {:?} ({} bytes, compressed {} bytes)",
-			ramdisk_file.path, decompressed_size, ramdisk_file.bin.len()
+			ramdisk_file.path,
+			decompressed_size,
+			ramdisk_file.bin.len()
 		);
 	}