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#####################
# #
# FoolOS Build Sys. #
# #
#####################
############ phony targets ############
.PHONY: all clean run
############ some constants ############
#lets use the size of a 1.44 floppy for a start for our boot img
IMAGE_SIZE=1474560
#font data starts at sector 50
FONT_DATA_START=25600
############ flags ############
CFLAGS=-ffreestanding -std=gnu99 -m32 -fno-asynchronous-unwind-tables -O0
############ source and object files ############
#kernel sources (asm and c)
SOURCES=$(wildcard ./kernel/*.c)
SOURCES+=$(wildcard ./lib/*/*.c)
ASMSOURCES=$(wildcard ./asm/*.asm)
#kernel object files
OBJECTS=$(patsubst %.c, %.o, $(SOURCES))
ASMOBJECTS=$(patsubst %.asm, %.o, $(ASMSOURCES))
KERNEL_ENTRY=./boot/kernel_entry.o
#master boot record asm
MBR=./boot/mbr.bin
#some fillup data (zeros)
FILLUP=./data/fill.bin
############ final image (default target) ############
all: FoolOS.img
############ nasm assembling rules ############
%.o: %.asm
nasm -f elf $^ -o $@
%.bin: %.asm
nasm -f bin $^ -o $@
############ linking kernel binary ############
# the kernel_entry.o needs to be FIRST!!
kernel.bin: $(KERNEL_ENTRY) $(ASMOBJECTS) $(OBJECTS)
ld -o $@ -Ttext 0x1000 --oformat binary -melf_i386 $^ -O0
############ fool-font ############
binfont.bin: data/binfont.src
python tools/binarize.py $< $@
############ assembling of final image ############
# master boot record, kernel binary and fool-font
FoolOS.img: Fool.img FoolData.img $(FILLUP)
cat $^ | head -c $(IMAGE_SIZE) > $@
Fool.img: $(MBR) kernel.bin $(FILLUP)
cat $^ | head -c $(FONT_DATA_START) > $@
FoolData.img: binfont.bin
cat $^ > $@
############ vm stuff ############
# run in our local bochs (we need cirrus support for our vesa mode)
run: FoolOS.img
~/opt/bochs-2.6.6/bochs -q
############ cleanup ############
clean:
-rm *.bin *.img bochs.log $(KERNEL_ENTRY) $(ASMOBJECTS) $(OBJECTS) $(FILLUP) $(MBR)
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