2022-05-09 13:45:06 +00:00
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# $@ = target file
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# $< = first dependency
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# $^ = all dependencies
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GDB = gdb
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C_FILES = $(shell find src/ -type f -name '*.c')
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CO_FILES = $(patsubst src/%.c, obj/%.o, $(C_FILES))
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ASM_FILES = $(shell find src/kernel/ -type f -name '*.asm')
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AO_FILES = $(patsubst src/kernel/%.asm, obj/kernel/%.o, $(ASM_FILES))
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ABIN_FILES = $(patsubst src/%.asm, bin/%.bin, $(ASM_FILES))
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os-image.bin: bin/boot.bin bin/kernel.bin
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cat $^ > $@
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bin/boot.bin: src/boot/boot.asm bin/kernel.bin .FORCE
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sed -i.orig "s@CH_REPLACE_BOOTSECTORCOUNT@$(shell ./getinblocks.py $(shell du -b "bin/kernel.bin" | cut -f 1))@g" src/boot/kernel.asm
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nasm -Isrc/boot/ $< -f bin -o $@
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mv src/boot/kernel.asm.orig src/boot/kernel.asm
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.FORCE:
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bin/kernel.bin: obj/kernel/entry.o ${CO_FILES} ${AO_FILES}
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i386-elf-ld -o $@ -Ttext 0x1000 $^ --oformat binary
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kernel.elf: obj/kernel/entry.o ${CO_FILES} ${AO_FILES}
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i386-elf-ld -o $@ -Ttext 0x1000 $^
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run: clean os-image.bin
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2022-05-13 01:12:29 +00:00
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qemu-system-x86_64 -hdd os-image.bin -d int
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2022-05-09 13:45:06 +00:00
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debug: clean os-image.bin kernel.elf
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qemu-system-x86_64 -s -S -hdd os-image.bin &
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${GDB} os-image.bin -ex "symbol-file kernel.elf" -ex "target remote localhost:1234"
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obj/%.o: src/%.c
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mkdir -p "$(@D)"
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i386-elf-gcc -g -ffreestanding -c $< -o $@
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obj/%.o: src/%.asm
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mkdir -p "$(@D)"
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nasm -f elf $< -o $@
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bin/%.bin: src/%.asm
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mkdir -p "$(@D)"
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nasm -f bin $< -o $@
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clean:
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find obj -type f -name '*.o' -exec rm {} +
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find obj -type f -name '*.bin' -exec rm {} +
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find bin -type f -name '*.o' -exec rm {} +
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find bin -type f -name '*.bin' -exec rm {} +
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find . -type f -name '*.dis' -exec rm {} +
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rm -f kernel.elf
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