87 lines
1.5 KiB
Makefile
87 lines
1.5 KiB
Makefile
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# environment
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AARCH64_TOOLCHAIN ?= aarch64-linux-gnu
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# Shortcuts
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CC=clang --target=aarch64-none-elf -mcpu=cortex-a57
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# CC=$(AARCH64_TOOLCHAIN)-gcc
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LD=$(AARCH64_TOOLCHAIN)-ld
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OBJCOPY=$(AARCH64_TOOLCHAIN)-objcopy --target elf64-littleaarch64
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CFLAGS += -O0
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CFLAGS += -g
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CFLAGS += -nostdlib
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CFLAGS += -march=armv8-a
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#CFLAGS += -std=c99
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#CFLAGS += -pedantic
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#CFLAGS += -Wall
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#CFLAGS += -Wmissing-prototypes
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#CFLAGS += -Wstrict-prototypes
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#CFLAGS += -Wold-style-definition
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BUILD_DIR=build
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# Files
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KERNEL_MEMMAP = sys/memmap
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KERNEL_SOURCES = \
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aarch64/boot.s \
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sys/main.c \
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sys/uart.c \
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KERNEL_LIST := $(wildcard $(KERNEL_SOURCES))
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KERNEL_OBJS := $(addsuffix .o, $(addprefix $(BUILD_DIR)/, ${KERNEL_LIST}))
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all: kernel
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# compilation
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kernel: $(BUILD_DIR)/kernel.elf # $(BUILD_DIR)/kernel.sym
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$(BUILD_DIR)/kernel.elf: $(KERNEL_OBJS)
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$(info linking target: $@)
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$(LD) -T$(KERNEL_MEMMAP) $^ -o $@
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$(info done: $@)
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$(BUILD_DIR)/kernel.bin: $(BUILD_DIR)/kernel.elf
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$(OBJCOPY) -O binary $< $@
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$(BUILD_DIR)/kernel.sym: $(BUILD_DIR)/kernel.elf
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$(OBJCOPY) --only-keep-debug $< $@
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$(OBJCOPY) --strip-debug $@
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$(BUILD_DIR)/%.o: %
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$(info compiling file: $<)
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@mkdir -p $(dir ./$(BUILD_DIR)/$<)
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$(CC) $(CFLAGS) -c $< -o $@
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.PHONY: clean run
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# helpers
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QEMU_CMD = \
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qemu-system-aarch64 \
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-cpu cortex-a57 \
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-machine type=virt \
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-nographic \
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-smp 4 \
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-m 4098 \
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-kernel build/kernel.elf \
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-serial stdio \
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-monitor none
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clean:
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rm -Rf ./$(BUILD_DIR)/*
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run: kernel
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$(QEMU_CMD)
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debug: kernel
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$(QEMU_CMD) -gdb tcp::1234 -S
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