51 lines
1.2 KiB
Makefile
51 lines
1.2 KiB
Makefile
ASM=nasm
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SRC_DIR=src
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BUILD_DIR=build
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.PHONY: all floppy_image kernel bootloader clean always
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#
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# Floppy image
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# * use dd to create 1.44MB blank image file
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# * apply FAT12 filesystem to image
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# * copy 512 byte bootloader binary to image using dd (overwriting first sector)
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# * copy kernel binary to filesystem
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# + this step wtill fail if bootloader binary does not contain proper FAT12 headers
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#
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floppy_image: $(BUILD_DIR)/main_floppy.img
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$(BUILD_DIR)/main_floppy.img: bootloader kernel
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dd if=/dev/zero of=$(BUILD_DIR)/main_floppy.img bs=512 count=2880
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mkfs.fat -F 12 -n "WEESLOS" $(BUILD_DIR)/main_floppy.img
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dd if=$(BUILD_DIR)/bootloader.bin of=$(BUILD_DIR)/main_floppy.img conv=notrunc
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mcopy -i $(BUILD_DIR)/main_floppy.img $(BUILD_DIR)/kernel.bin "::kernel.bin"
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#
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# Bootloader
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#
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bootloader: $(BUILD_DIR)/bootloader.bin
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$(BUILD_DIR)/bootloader.bin: always
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$(ASM) $(SRC_DIR)/bootloader/boot.asm -f bin -o $(BUILD_DIR)/bootloader.bin
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#
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# Kernel
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#
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kernel: $(BUILD_DIR)/kernel.bin
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$(BUILD_DIR)/kernel.bin: always
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$(ASM) $(SRC_DIR)/kernel/main.asm -f bin -o $(BUILD_DIR)/kernel.bin
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#
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# Always
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#
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always:
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mkdir -p $(BUILD_DIR)
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#
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# Clean
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#
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clean:
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rm -rf $(BUILD_DIR)/*
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