42 lines
1.4 KiB
Makefile
42 lines
1.4 KiB
Makefile
OBJCOPY=objcopy
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ASFLAGS+=-m32
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all: sos_qemu.img
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-include ../.mkvars
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# The image is the simple concatenation of the boot sector and the kernel
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# It may be use in bochs or on a real floppy, but NOT in qemu (see below)
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sos_bsect.img: bsect.bin sos.bin
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cat $^ > $@
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@echo "[31mYou can use the $@ image in bochs or on a real floppy (NOT qemu)[m"
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# For qemu, the trick is to tell it we have *more* than 1440 sectors (720kB).
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# Rtherwise the qemu disk geometry will be configured to be that of a 720kB
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# floppy, while our boot sector assumes it to be 1.44MB
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sos_qemu.img: sos_bsect.img
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# Padding with 0s after the bsect/kernel image
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cat $< /dev/zero | dd of=$@ bs=1k count=1440
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@echo "[31mYou can use the $@ image in qemu, bochs, or on a real floppy[m"
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# we extract the boot sector from the main ELF binary
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bsect.bin: sos_bsect.elf
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$(OBJCOPY) -v -O binary -j .bootsect $< $@
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# we extract the kernel code from the main ELF binary
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sos.bin: sos_bsect.elf
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$(OBJCOPY) -v -O binary -R .bootsect $< $@
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# The main ELF binary contains the boot sector and the kernel code
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# linked together (hence we deal with a SINGLE image that we split
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# above) because they share some symbol definitions
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sos_bsect.elf: bootsect.o compile_kernel
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$(LD) -m elf_i386 --warn-common -T ./sos_bsect.lds -o $@ \
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bootsect.o $(wildcard ../hwcore/*.o ../drivers/*.o ../sos/*.o)
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compile_kernel:
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$(MAKE) -C ..
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clean:
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$(RM) *.img *.elf *.bin *~ *.o *.out
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