blob: 4d801430abe4013eb8aa0d4fe6e011b0e3ddb5bc (
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TOOLCHAIN := riscv64-linux-gnu
CC := $(TOOLCHAIN)-gcc
CXX := $(TOOLCHAIN)-g++
LD := $(TOOLCHAIN)-ld
OBJCOPY := $(TOOLCHAIN)-objcopy
TARGET_ELF := build/kernel.elf
TARGET_BIN := build/kernel.bin
ARCH_FLAGS := -march=rv64gc -mabi=lp64 -mcmodel=medany
CFLAGS := -Wall -Wextra -O2 -ffreestanding -nostdlib -Iinclude $(ARCH_FLAGS)
CXXFLAGS := $(CFLAGS) -fno-exceptions -fno-rtti -fno-use-cxa-atexit
SRC_DIRS := src
SRCS_ASM := $(shell find $(SRC_DIRS) -name "*.S")
SRCS_CXX := $(shell find $(SRC_DIRS) -name "*.cc")
OBJS := $(SRCS_ASM:%.S=build/%.o) $(SRCS_CXX:%.cc=build/%.o)
DEPS := $(OBJS:.o=.d)
LINKER_SCRIPT := linker.ld
QEMU := qemu-system-riscv64
QEMU_FLAGS := -machine virt -m 128M -nographic -bios none -kernel $(TARGET_ELF)
.PHONY: all clean run debug directories
all: directories $(TARGET_ELF)
$(TARGET_ELF): $(OBJS) $(LINKER_SCRIPT)
@echo "Linking $@"
@$(LD) -T $(LINKER_SCRIPT) -o $@ $(OBJS)
build/%.o: %.S
@mkdir -p $(dir $@)
@echo "Compiling ASM $<"
@$(CC) $(CFLAGS) -MMD -c $< -o $@
build/%.o: %.cc
@mkdir -p $(dir $@)
@echo "Compiling C++ $<"
@$(CXX) $(CXXFLAGS) -MMD -c $< -o $@
directories:
@mkdir -p build
run: all
@echo "Starting QEMU..."
$(QEMU) $(QEMU_FLAGS)
debug: all
@echo "Starting QEMU in debug mode (connect with gdb-multiarch)..."
$(QEMU) $(QEMU_FLAGS) -S -s
clean:
@rm -rf build
-include $(DEPS)
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