完善用户程序Makefile, 现在可以build出来二进制文件

ch2/user/Makefile

@@ -1,16 +1,28 @@
 MODE := release
 TARGET := riscv64gc-unknown-none-elf
-
+OBJDUMP := rust-objdump --arch-name=riscv64
+OBJCOPY := rust-objcopy --binary-architecture=riscv64
 
 RUST_FLAGS := -Clink-arg=-Tsrc/linker.ld  # 使用我们自己的链接脚本
 RUST_FLAGS += -Cforce-frame-pointers=yes  # 强制编译器生成帧指针
 RUST_FLAGS:=$(strip ${RUST_FLAGS})
 
+APP_DIR := src/bin
+TARGET_DIR := target/$(TARGET)/$(MODE)
+APPS := $(wildcard $(APP_DIR)/*.rs)
+ELFS := $(patsubst $(APP_DIR)/%.rs, $(TARGET_DIR)/%, $(APPS))
+BINS := $(patsubst $(APP_DIR)/%.rs, $(TARGET_DIR)/%.bin, $(APPS))
+
+
 # 编译elf文件
 build_elf: clean
 	CARGO_BUILD_RUSTFLAGS="$(RUST_FLAGS)" \
  	cargo build --$(MODE) --target=$(TARGET)
 
 
+build: build_elf
+	@$(foreach elf, $(ELFS), $(OBJCOPY) $(elf) --strip-all -O binary $(patsubst $(TARGET_DIR)/%, $(TARGET_DIR)/%.bin, $(elf));)
+
+
 clean:
 	rm -rf ./target*