Inject the logger for Asterinas

kernel/comps/logger/src/lib.rs

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: MPL-2.0
+
+//! The logger implementation for Asterinas.
+//!
+//! This logger now has the most basic logging functionality, controls the output
+//! based on the globally set log level. Different log levels will be represented
+//! with different colors if enabling `log_color` feature.
+//!
+//! This logger guarantees _atomicity_ under concurrency: messages are always
+//! printed in their entirety without being mixed with messages generated
+//! concurrently on other cores.
+//!
+//! IRQs are disabled while printing. So do not print long log messages.
+#![no_std]
+#![deny(unsafe_code)]
+
+extern crate alloc;
+
+use component::{init_component, ComponentInitError};
+
+mod aster_logger;
+mod console;
+
+pub use console::_print;
+
+#[init_component]
+fn init() -> Result<(), ComponentInitError> {
+    aster_logger::init();
+    Ok(())
+}