83 lines
2.3 KiB
Makefile
83 lines
2.3 KiB
Makefile
.POSIX:
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COMMON ?= common.h
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DOC_OUT = README.html
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ELF_EXT = .elf
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LD ?= ld
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LINKER_SCRIPT ?= linker.ld
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# Use gcc so that the preprocessor will run first.
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GAS ?= gcc
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GAS_EXT ?= .S
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NASM_EXT ?= .asm
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OBJ_EXT ?= .o
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OUT_EXT ?= .img
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QEMU ?= qemu-system-i386 -drive 'file=$(RUN_FILE),format=raw' -serial mon:stdio -smp 2
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RUN ?= bios_hello_world
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RUN_ARGS ?= -soundhw pcspk
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TMP_EXT ?= .tmp
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OUTS := $(sort $(foreach IN_EXT,$(NASM_EXT) $(GAS_EXT),$(patsubst %$(IN_EXT),%$(OUT_EXT),$(wildcard *$(IN_EXT)))))
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RUN_FILE := $(RUN)$(OUT_EXT)
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.PRECIOUS: %$(OBJ_EXT)
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.PHONY: all clean doc run
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all: $(OUTS)
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%$(OUT_EXT): %$(OBJ_EXT) $(LINKER_SCRIPT)
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$(LD) -melf_i386 -nostdlib -o '$(@:$(OUT_EXT)=$(ELF_EXT))' -T '$(LINKER_SCRIPT)' '$<'
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objcopy -O binary '$(@:$(OUT_EXT)=.elf)' '$@'
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%$(OBJ_EXT): %$(GAS_EXT) $(COMMON)
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$(GAS) -m32 -c -ggdb3 -o '$@' '$<'
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%$(OUT_EXT): %$(NASM_EXT)
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nasm -f bin -o '$@' '$<'
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# So that directories without a common.h can reuse this.
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$(COMMON):
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clean:
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rm -fr '$(DOC_OUT)' *$(ELF_EXT) *$(OBJ_EXT) *$(OUT_EXT) *$(TMP_EXT)
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run: $(RUN_FILE)
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$(QEMU) $(RUN_ARGS)
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debug: $(RUN_FILE)
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$(QEMU) -S -s &
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gdb -quiet -x gdb.gdb '$(<:$(OUT_EXT)=$(ELF_EXT))'
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bochs: $(RUN_FILE)
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# Supposes size is already multiples of 512.
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# We force that with our linker script,
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# and `grub-mkrescue` also seems to respect it as well.
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CYLINDERS="$$(($$(stat -c '%s' '$(RUN_FILE)') / 512))" && \
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bochs -qf /dev/null \
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'ata0-master: type=disk, path="$(RUN_FILE)", mode=flat, cylinders='"$$CYLINDERS"', heads=1, spt=1' \
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'com1: enabled=1, mode=file, dev=$(RUN).tmp.serial' \
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'boot: disk' \
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'display_library: sdl2' \
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'megs: 128'
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BIG_IMG_DIR := big_img$(TMP_EXT)
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BOOT_DIR := $(BIG_IMG_DIR)/boot
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GRUB_DIR := $(BOOT_DIR)/grub
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big$(OUT_EXT): all
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rm -rf '$(BIG_IMG_DIR)'
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mkdir -p '$(GRUB_DIR)'
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for out in $(OUTS); do\
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printf "menuentry \"$${out%.*}\" {\n chainloader /boot/$$out\n}\n" >> '$(GRUB_DIR)/grub.cfg';\
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cp "$$out" '$(BOOT_DIR)';\
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done
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# TODO why does this fail to boot properly?
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#make -C multiboot/hello-world
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#mkdir -p '$(BOOT_DIR)/multiboot'
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#printf "menuentry \"multiboot/hello-world\" {\n chainloader /boot/multiboot/hello-world.img\n}\n" >> '$(GRUB_DIR)/grub.cfg';\
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#cp multiboot/hello-world/main.img '$(BOOT_DIR)/multiboot/hello-world.img'
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grub-mkrescue -o '$@' '$(BIG_IMG_DIR)'
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doc: $(DOC_OUT)
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$(DOC_OUT): README.adoc
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asciidoctor -o $@ -v $<
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