移除标准库

ch1/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "ch1"
+name = "os"
 version = "0.1.0"
 edition = "2021"
 

ch1/Makefile

@@ -0,0 +1,20 @@
+
+TARGET := riscv64gc-unknown-none-elf
+KERNEL_START := 0x80200000
+MODE := release
+
+
+build:
+	cargo build --$(MODE) --target=$(TARGET)
+
+run:build
+	qemu-system-riscv64 \
+		-machine virt \
+		-nographic \
+		-bios ../bootloader/rustsbi-qemu.bin \
+		-device loader,file=target/$(TARGET)/$(MODE)/os.bin,addr=$(KERNEL_START)
+
+
+
+clean:
+	rm -rf ./target

ch1/src/lang_items.rs

@@ -0,0 +1 @@
+pub mod panic;

ch1/src/lang_items/panic.rs

@@ -0,0 +1,8 @@
+
+
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
+}

ch1/src/main.rs

@@ -1,3 +1,9 @@
-fn main() {
-    println!("Hello, world!");
-}
+#![no_std]
+#![no_main]
+
+mod lang_items;
+
+// fn main() {
+//
+//     // println!("Hello, world!");
+// }