blob: 715fff8f1690334b5a420e9ce70cb6fcd562b44e (
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TOOLCHAIN_PREFIX := riscv64-linux-gnu-
CC := $(TOOLCHAIN_PREFIX)gcc
CXX := $(TOOLCHAIN_PREFIX)g++
LD := $(TOOLCHAIN_PREFIX)ld
OBJCOPY := $(TOOLCHAIN_PREFIX)objcopy
OBJDUMP := $(TOOLCHAIN_PREFIX)objdump
BUILD_DIR := build
SRC_DIR := src
CFLAGS := -Wall -Wextra -O2 -g -ffreestanding -nostdlib -mcmodel=medany -Iinclude
CXXFLAGS := $(CFLAGS) -fno-exceptions -fno-rtti -fno-use-cxa-atexit
LINKER_SCRIPT := linker.ld
UPROGS_SRC := $(SRC_DIR)/user/init.cc
UPROGS_OBJ := $(BUILD_DIR)/user/entry.o $(BUILD_DIR)/user/init.o
ULIB_OBJ := $(BUILD_DIR)/user/usys.o
USER_LD := $(SRC_DIR)/user/user.ld
INITCODE_BIN := $(BUILD_DIR)/user/initcode
SRCS_S := $(shell find $(SRC_DIR) -name "*.S" -not -path "$(SRC_DIR)/user/*")
SRCS_CXX := $(shell find $(SRC_DIR) -name "*.cc" -not -path "$(SRC_DIR)/user/*")
OBJS := $(SRCS_S:%.S=$(BUILD_DIR)/%.o) $(SRCS_CXX:%.cc=$(BUILD_DIR)/%.o)
TARGET := $(BUILD_DIR)/kernel.elf
QEMUOPTS = -drive file=fs.img,if=none,format=raw,id=x0
QEMUOPTS += -device virtio-blk-device,drive=x0 -global virtio-mmio.force-legacy=false
.PHONY: all clean run debug
all: $(TARGET)
$(BUILD_DIR)/user/%.o: $(SRC_DIR)/user/%.cc
@mkdir -p $(dir $@)
@echo " U_CXX $<"
@$(CXX) $(CXXFLAGS) -c $< -o $@
$(BUILD_DIR)/user/%.o: $(SRC_DIR)/user/%.S
@mkdir -p $(dir $@)
@echo " U_AS $<"
@$(CC) $(CFLAGS) -c $< -o $@
$(INITCODE_BIN): $(UPROGS_OBJ) $(ULIB_OBJ) $(USER_LD)
@echo " U_LD $@"
@$(LD) -T $(USER_LD) -o $@.out $(UPROGS_OBJ) $(ULIB_OBJ)
@$(OBJCOPY) -S -O binary $@.out $@
@$(OBJDUMP) -S $@.out > $@.asm
$(TARGET): $(OBJS) $(LINKER_SCRIPT)
@echo " LD $@"
@$(LD) -T $(LINKER_SCRIPT) -o $@ $(OBJS)
$(BUILD_DIR)/src/kernel/initcode.o: $(SRC_DIR)/kernel/initcode.S $(INITCODE_BIN)
@mkdir -p $(dir $@)
@echo " AS_INC $<"
@$(CC) $(CFLAGS) -c $< -o $@
$(BUILD_DIR)/%.o: %.S
@mkdir -p $(dir $@)
@echo " AS $<"
@$(CC) $(CFLAGS) -c $< -o $@
$(BUILD_DIR)/%.o: %.cc
@mkdir -p $(dir $@)
@echo " CXX $<"
@$(CXX) $(CXXFLAGS) -c $< -o $@
fs.img:
@echo " IMG Generating fs.img (1MB)"
@dd if=/dev/zero of=fs.img bs=1M count=1 2>/dev/null
run: $(TARGET) fs.img
@echo " QEMU Running..."
@qemu-system-riscv64 -machine virt -nographic \
-kernel $(TARGET) -m 128M $(QEMUOPTS)
debug: $(TARGET) fs.img
@echo " QEMU (DEBUG) Waiting for GDB..."
@qemu-system-riscv64 -machine virt -nographic \
-kernel $(TARGET) -m 128M -s -S $(QEMUOPTS)
clean:
rm -rf $(BUILD_DIR) fs.img
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