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001 OBJCOPY=objcopy 001 OBJCOPY=objcopy >> 002 LIBGCC := $(shell $(CC) -print-libgcc-file-name) # To benefit from FP/64bits artihm. >> 003 EXTRA := $(shell [ -f ../userland/userprogs.kimg ] && echo ../userland/userprogs.kimg) 002 004 003 all: sos_qemu.img 005 all: sos_qemu.img 004 006 005 -include ../.mkvars 007 -include ../.mkvars 006 008 007 # The image is the simple concatenation of the 009 # The image is the simple concatenation of the boot sector and the kernel 008 # It may be use in bochs or on a real floppy, 010 # It may be use in bochs or on a real floppy, but NOT in qemu (see below) 009 sos_bsect.img: bsect.bin sos.bin 011 sos_bsect.img: bsect.bin sos.bin 010 cat $^ > $@ 012 cat $^ > $@ 011 @echo "[31mYou can use the $@ image i 013 @echo "[31mYou can use the $@ image in bochs or on a real floppy (NOT qemu)[m" 012 014 013 # For qemu, the trick is to tell it we have *m 015 # For qemu, the trick is to tell it we have *more* than 1440 sectors (720kB). 014 # Rtherwise the qemu disk geometry will be con 016 # Rtherwise the qemu disk geometry will be configured to be that of a 720kB 015 # floppy, while our boot sector assumes it to 017 # floppy, while our boot sector assumes it to be 1.44MB 016 sos_qemu.img: sos_bsect.img 018 sos_qemu.img: sos_bsect.img 017 # Padding with 0s after the bsect/kern 019 # Padding with 0s after the bsect/kernel image 018 cat $< /dev/zero | dd of=$@ bs=1k coun 020 cat $< /dev/zero | dd of=$@ bs=1k count=1440 019 @echo "[31mYou can use the $@ image i 021 @echo "[31mYou can use the $@ image in qemu, bochs, or on a real floppy[m" 020 022 021 # we extract the boot sector from the main ELF 023 # we extract the boot sector from the main ELF binary 022 bsect.bin: sos_bsect.elf 024 bsect.bin: sos_bsect.elf 023 $(OBJCOPY) -v -O binary -j .bootsect $ 025 $(OBJCOPY) -v -O binary -j .bootsect $< $@ 024 026 025 # we extract the kernel code from the main ELF 027 # we extract the kernel code from the main ELF binary 026 sos.bin: sos_bsect.elf 028 sos.bin: sos_bsect.elf 027 $(OBJCOPY) -v -O binary -R .bootsect $ 029 $(OBJCOPY) -v -O binary -R .bootsect $< $@ 028 030 029 # The main ELF binary contains the boot sector 031 # The main ELF binary contains the boot sector and the kernel code 030 # linked together (hence we deal with a SINGLE 032 # linked together (hence we deal with a SINGLE image that we split 031 # above) because they share some symbol defini 033 # above) because they share some symbol definitions 032 sos_bsect.elf: bootsect.o compile_kernel 034 sos_bsect.elf: bootsect.o compile_kernel 033 $(LD) --warn-common -T ./sos_bsect.lds 035 $(LD) --warn-common -T ./sos_bsect.lds -o $@ \ 034 bootsect.o $(wildcard ../hwcor !! 036 bootsect.o $(wildcard ../hwcore/*.o ../drivers/*.o ../sos/*.o)\ >> 037 $(EXTRA) $(LIBGCC) 035 038 036 compile_kernel: 039 compile_kernel: 037 $(MAKE) -C .. 040 $(MAKE) -C .. 038 041 039 clean: 042 clean: 040 $(RM) *.img *.elf *.bin *~ *.o *.out 043 $(RM) *.img *.elf *.bin *~ *.o *.out
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