3: add watch

Author: jackos

Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "linux"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

Makefile

@@ -1803,6 +1803,13 @@ $(DOC_TARGETS):
 
 # Rust targets
 # ---------------------------------------------------------------------------
+PHONY += rustwatch
+rustwatch:
+	$(Q) cargo watch -w ./samples/rust/rust_vdev.rs -cs 'make && qemu-system-x86_64 -nographic -kernel vmlinux -initrd initrd.img -nic user,model=rtl8139,hostfwd=tcp::5555-:23'
+
+PHONY += rustvm
+rustvm:
+	$(Q) make && qemu-system-x86_64 -nographic -kernel vmlinux -initrd initrd.img -nic user,model=rtl8139,hostfwd=tcp::5555-:23
 
 # "Is Rust available?" target
 PHONY += rustavailable

samples/rust/rust_vdev.rs

@@ -14,6 +14,7 @@ impl kernel::Module for VDev {
         // Print a banner to make sure our moudle is working
         pr_info!("-----------------------\n");
         pr_info!("initialize vdev module!\n");
+        pr_info!("watching for changes...\n");
         pr_info!("-----------------------\n");
         Ok(VDev)
     }

src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}