新增rust ffi (#77)

* 引入cargo

* 取消对Cargo.lock的跟踪

* 解决vscode报错问题

* new: rust的代码能够调用c语言的printk_color

* 1、将原本run.sh的工作拆解，变为几个不同的make命令
2、在docker镜像中编译rust

* 更改workflow

* update workflow

* new: 解决workflow无法通过编译的问题

kernel/.cargo/config.toml

@@ -0,0 +1,11 @@
+[build]
+target = "src/arch/x86_64/x86_64-unknown-none.json"
+
+[unstable]
+build-std = ["core", "compiler_builtins"]
+build-std-features = ["compiler-builtins-mem"]
+
+[target.'cfg(target_os = "none")']
+runner = "bootimage runner"
+
+[env]

kernel/.gitignore

@@ -0,0 +1,5 @@
+target/
+src/kernel
+Cargo.lock
+# 将自动生成的Rust FFI加到gitignore
+src/include/bindings/bindings.rs

kernel/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "dragonos_kernel"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+crate-type = ["staticlib"]
+
+[dependencies]
+x86_64 = "0.14.10"
+
+[build-dependencies]
+bindgen = "0.61.0"

kernel/Makefile

@@ -1,75 +1,8 @@
-SUBDIR_ROOTS := .
-DIRS := . $(shell find $(SUBDIR_ROOTS) -type d)
-GARBAGE_PATTERNS := *.o *.s~ *.s *.S~ *.c~ *.h~ kernel
-GARBAGE := $(foreach DIR,$(DIRS),$(addprefix $(DIR)/,$(GARBAGE_PATTERNS)))
 
-DIR_LIB=lib
-lib_patterns := *.a
-LIB_FILES := $(foreach DIR,$(DIR_LIB),$(addprefix $(DIR)/,$(lib_patterns)))
-
-
-# 控制操作系统使用的中断控制器 _INTR_8259A_ _INTR_APIC_
-PIC := _INTR_APIC_
-CFLAGS = $(GLOBAL_CFLAGS) -D $(PIC) -I $(shell pwd)
-
-export ASFLAGS := --64
-
-LD_LIST := head.o
-
-
-kernel_subdirs := common driver process debug filesystem time arch exception mm smp sched syscall ktest lib ipc
+all: 
+	$(MAKE) -C src all
 	
 
-
-head.o: head.S
-	$(CC) -E head.S > _head.s # 预处理
-	as $(ASFLAGS) -o head.o _head.s
-
-
-main.o: main.c 
-# -fno-builtin: 不使用C语言内建函数
-# The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture.
-	$(CC) $(CFLAGS) -c main.c  -o main.o
-
-
-all: kernel
-	@echo "Linking kernel..."
-	ld -b elf64-x86-64 -z muldefs -o kernel head.o main.o $(shell find . -name "*.o") -T link.lds
-# 生成kallsyms
-	current_dir=$(pwd)
-	
-	@dbg='debug';for x in $$dbg; do \
-		cd $$x;\
-		$(MAKE) generate_kallsyms kernel_root_path="$(shell pwd)";\
-		cd ..;\
-		if [ "$$?" != "0" ]; then\
-            exit $$?;\
-        fi;\
-	done
-	
-# 重新链接
-	@echo "Re-Linking kernel..."
-	ld -b elf64-x86-64 -z muldefs -o kernel head.o main.o $(shell find . -name "*.o") ./debug/kallsyms.o -T link.lds
-	@echo "Generating kernel ELF file..."
-# 生成内核文件
-	objcopy -I elf64-x86-64 -O elf64-x86-64 -R ".comment" -R ".eh_frame" kernel ../bin/kernel/kernel.elf
-	@echo "Kernel Build Done."
-
-ECHO:
-	@echo "$@"
-
-$(kernel_subdirs): ECHO
-
-	$(MAKE) -C $@ all CFLAGS="$(CFLAGS)" ASFLAGS="$(ASFLAGS)" PIC="$(PIC)" kernel_root_path="$(shell pwd)"
-
-kernel: head.o main.o $(kernel_subdirs)
-	
-
-
-clean: 
-	rm -rf $(GARBAGE)
-	@list='$(kernel_subdirs)'; for subdir in $$list; do \
-		echo "Clean in dir: $$subdir";\
-		cd $$subdir && $(MAKE) clean;\
-		cd .. ;\
-	done
+clean:
+	rm -f Cargo.lock
+	$(MAKE) -C src clean

kernel/build.rs

@@ -0,0 +1,40 @@
+extern crate bindgen;
+
+use std::path::PathBuf;
+
+fn main() {
+    // Tell cargo to look for shared libraries in the specified directory
+    println!("cargo:rustc-link-search=src");
+    println!("cargo:rerun-if-changed=src/include/bindings/wrapper.h");
+    let binding_file_path = "src/include/bindings/bindings.rs";
+    // The bindgen::Builder is the main entry point
+    // to bindgen, and lets you build up options for
+    // the resulting bindings.
+    {
+        let bindings = bindgen::Builder::default()
+            .clang_arg("-I./src")
+            // The input header we would like to generate
+            // bindings for.
+            .header("src/include/bindings/wrapper.h")
+            .clang_arg("--target=x86_64-none-none")
+            .clang_arg("-v")
+            // 使用core，并将c语言的类型改为core::ffi，而不是使用std库。
+            .use_core()
+            .ctypes_prefix("::core::ffi")
+            .generate_inline_functions(true)
+            // Tell cargo to invalidate the built crate whenever any of the
+            // included header files changed.
+            .parse_callbacks(Box::new(bindgen::CargoCallbacks))
+            // Finish the builder and generate the bindings.
+            .generate()
+            // Unwrap the Result and panic on failure.
+            .expect("Unable to generate bindings");
+
+        // Write the bindings to the $OUT_DIR/bindings.rs file.
+        let out_path = PathBuf::from(String::from("."));
+
+        bindings
+            .write_to_file(out_path.join(binding_file_path))
+            .expect("Couldn't write bindings!");
+    }
+}

kernel/src/Makefile

@@ -0,0 +1,79 @@
+SUBDIR_ROOTS := .
+DIRS := . $(shell find $(SUBDIR_ROOTS) -type d)
+GARBAGE_PATTERNS := *.o *.s~ *.s *.S~ *.c~ *.h~ kernel
+GARBAGE := $(foreach DIR,$(DIRS),$(addprefix $(DIR)/,$(GARBAGE_PATTERNS)))
+
+DIR_LIB=lib
+lib_patterns := *.a
+LIB_FILES := $(foreach DIR,$(DIR_LIB),$(addprefix $(DIR)/,$(lib_patterns)))
+
+
+# 控制操作系统使用的中断控制器 _INTR_8259A_ _INTR_APIC_
+PIC := _INTR_APIC_
+CFLAGS = $(GLOBAL_CFLAGS) -D $(PIC) -I $(shell pwd)
+
+export ASFLAGS := --64
+
+LD_LIST := head.o
+
+
+kernel_subdirs := common driver process debug filesystem time arch exception mm smp sched syscall ktest lib ipc
+	
+
+
+head.o: head.S
+	$(CC) -E head.S > _head.s # 预处理
+	as $(ASFLAGS) -o head.o _head.s
+
+
+main.o: main.c 
+# -fno-builtin: 不使用C语言内建函数
+# The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture.
+	$(CC) $(CFLAGS) -c main.c  -o main.o
+
+
+all: kernel
+	rustup default nightly
+	cargo +nightly build --release --target ./arch/x86_64/x86_64-unknown-none.json
+	@echo "Linking kernel..."
+	ld -b elf64-x86-64 -z muldefs -o kernel head.o main.o $(shell find . -name "*.o") ../target/x86_64-unknown-none/release/libdragonos_kernel.a -T link.lds
+# 生成kallsyms
+	current_dir=$(pwd)
+	
+	@dbg='debug';for x in $$dbg; do \
+		cd $$x;\
+		$(MAKE) generate_kallsyms kernel_root_path="$(shell pwd)";\
+		cd ..;\
+		if [ "$$?" != "0" ]; then\
+            exit $$?;\
+        fi;\
+	done
+	
+	
+# 重新链接
+	@echo "Re-Linking kernel..."
+	ld -b elf64-x86-64 -z muldefs -o kernel head.o main.o $(shell find . -name "*.o") ../target/x86_64-unknown-none/release/libdragonos_kernel.a ./debug/kallsyms.o  -T link.lds
+	@echo "Generating kernel ELF file..."
+# 生成内核文件
+	objcopy -I elf64-x86-64 -O elf64-x86-64 -R ".comment" -R ".eh_frame" kernel ../../bin/kernel/kernel.elf
+	@echo "Kernel Build Done."
+
+ECHO:
+	@echo "$@"
+
+$(kernel_subdirs): ECHO
+
+	$(MAKE) -C $@ all CFLAGS="$(CFLAGS)" ASFLAGS="$(ASFLAGS)" PIC="$(PIC)" kernel_root_path="$(shell pwd)"
+
+kernel: head.o main.o $(kernel_subdirs)
+	
+
+
+clean: 
+	cargo clean
+	rm -rf $(GARBAGE)
+	@list='$(kernel_subdirs)'; for subdir in $$list; do \
+		echo "Clean in dir: $$subdir";\
+		cd $$subdir && $(MAKE) clean;\
+		cd .. ;\
+	done

kernel/src/arch/x86_64/x86_64-unknown-none.json

@@ -0,0 +1,15 @@
+{
+  "llvm-target": "x86_64-unknown-none",
+  "data-layout": "e-m:e-i64:64-f80:128-n8:16:32:64-S128",
+  "arch": "x86_64",
+  "target-endian": "little",
+  "target-pointer-width": "64",
+  "target-c-int-width": "32",
+  "os": "none",
+  "linker": "rust-lld",
+  "linker-flavor": "ld.lld",
+  "executables": true,
+  "features": "-mmx,-sse,+soft-float",
+  "disable-redzone": true,
+  "panic-strategy": "abort"
+}