58 lines
1.8 KiB
Makefile
58 lines
1.8 KiB
Makefile
objects = entry.o kernel.o task.o handler.o interrupt.o v86.o print.o tss.o gdt.o\
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paging.o fault.o tests.o kbd.o helper.o disk.o file.o fs.o dosfs/dosfs.o fs_dos.o\
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progs.o hexedit.o textedit.o
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CFLAGS = -target "i686-elf" -m32 -mgeneral-regs-only -ffreestanding\
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-march=i686 -fno-stack-protector -Wno-int-conversion -nostdlib -c
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LFLAGS = -Wl,--gc-sections -Wl,--print-gc-sections -m32 -nostartfiles -nostdlib
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ifeq ($(OUTFILE),)
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OUTFILE = virtdisk.bin
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endif
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ifeq ($(PARTSTART),)
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PARTSTART = 2048
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endif
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PARTVBR=$(shell echo "$(PARTSTART) * (2^9)" | bc)
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PARTVBRBOOT=$(shell echo "$(PARTVBR) + 90" | bc)
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KERNSEC=$(shell echo "$(PARTSTART) + 4" | bc)
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.PHONY: $(OUTFILE)
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all: $(OUTFILE)
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$(OUTFILE): boot.bin boot_partition.bin kernel.bin
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# Copy system bootloader to boot sector, don't overwrite MBR
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dd bs=400 count=1 conv=notrunc if=boot.bin of=$@
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# Ensure partition VBR contains EB 5A
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echo -n -e '\xeb\x5a' | dd bs=1 seek=$(PARTVBR) count=2 conv=notrunc of=$@
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# Copy kernel bootloader to partition VBR
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dd bs=1 count=420 seek=$(PARTVBRBOOT) conv=notrunc if=boot_partition.bin of=$@
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# TODO Check that disk has enough reserved sectors,
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# currently this will overwrite the disk if too few
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# Write kernel beyond boot sector, maximum 64K (128 sectors)
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dd bs=512 count=128 seek=$(KERNSEC) conv=notrunc if=kernel.bin of=$@
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kernel.bin: out.o link.ld usermode.o
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clang $(LFLAGS) -Wl,-M -Tlink.ld -ffreestanding -o $@ out.o usermode.o
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usermode.o: usermode.bin
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objcopy -I binary -O elf32-i386 -B i386 $< $@
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%.bin: %.nasm
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nasm -o $@ $<
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out.o: $(objects)
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clang $(LFLAGS) -e entry -r -o $@ $^
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%.o: %.nasm
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nasm -f elf32 -o $@ $<
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%.o: %.c
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clang $(CFLAGS) -ffunction-sections -fdata-sections -Os -o $@ $<
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virtdisk:
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cp virtdisk.bin.ex virtdisk.bin
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clean:
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rm -f $(objects) out.o kernel.bin boot.bin usermode.bin
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