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#####################
# #
# FoolOS Build Sys. #
# #
#####################
############ some constants ############
#take care to set this properly!
USB_STICK=/dev/sdf
#here our kernel will be loaded by the bootloader.
KERNEL_START=0x100000
#use our cross compiler
CC=i686-elf-gcc
############ compiler flags ############
CFLAGS=
CFLAGS+=-ffreestanding
CFLAGS+=-nostdlib
CFLAGS+=-std=gnu11
CFLAGS+= -I.
#CFLAGS+=-lgcc
CFLAGS+=-Werror-implicit-function-declaration
#CFLAGS+= -O4
#CFLAGS+=-fdata-sections -ffunction-sections
#CFLAGS+= -Werror
############ source and object files ############
#kernel sources (asm and c)
SOURCES=$(wildcard ./kernel/*.c)
SOURCES+=$(wildcard ./video/*.c)
SOURCES+=$(wildcard ./lib/*/*.c)
SOURCES+=$(wildcard ./fs/*.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=./boot0/mbr.bin
#stage 2 bootloader
STAGE2=./boot/stage2.bin
#multiprocessor binary entry
MP_BIN=./boot/mp.bin
#some fillup data (zeros)
FILLUP=./data/fill.bin
############ final image (default target) ############
all: FoolOS.vdi
new: clean all
newrun: clean run
############ 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)
$(CC) $(CFLAGS) -o $@ -Wl,-Ttext,$(KERNEL_START),--oformat,binary $^
############ 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: $(MBR) $(STAGE2) kernel.bin $(FILLUP) FoolData.img
cp $(FILLUP) $@
dd if=$(MBR) of=$@ bs=512 seek=0 conv=notrunc
dd if=$(STAGE2) of=$@ bs=512 seek=1 conv=notrunc
dd if=kernel.bin of=$@ bs=512 seek=10 conv=notrunc #will end up at 0x100000 in ram (this is what the booloader starts loading secotr: 10)
dd if=FoolData.img of=$@ bs=512 seek=842 conv=notrunc #data starts at 0x168000
binfont.img: binfont.bin
cat $^ > $@
FoolData.img: binfont.bin $(MP_BIN) userspace/ext2.img
dd if=$(MP_BIN) of=$@ bs=512 seek=0 conv=notrunc
dd if=binfont.bin of=$@ bs=512 seek=1 conv=notrunc
dd if=userspace/ext2.img of=$@ bs=512 seek=4 conv=notrunc #will end up at 0x80800 in ram
############ virtual machines stuff ############
# vdi image for VirtualBox
FoolOS.vdi: FoolOS.img
VBoxManage convertfromraw FoolOS.img FoolOS.vdi --uuid 2f11ca11-c35d-4240-b77e-79e37d32616c
# run in our local bochs (we need cirrus support for our vesa mode)
run: all
~/opt/bochs-2.6.6/bochs -q -f bochs/bochsrc -rc bochs/bochsdebug
############ create bootable usb image ############
stick: FoolOS.img
cat FoolOS.img > $(USB_STICK) && sync
xxd $(USB_STICK) | head -n 50
############ cleanup ############
clean_release:
-rm *.bin FoolData.img binfont.img bochs.log $(KERNEL_ENTRY) $(ASMOBJECTS) $(OBJECTS) $(FILLUP) $(MBR) $(MP_BIN) bochs.out ne2k-tx.log ne2k-txdump.txt $(STAGE2)
make -C userspace clean
clean: clean_release
-rm FoolOS.img FoolOS.vdi
release: new
-mv FoolOS.img release/
make clean_release
userspace/ext2.img:
make -C userspace
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