CC = i386-elf-gcc

LD = i386-elf-ld

OBJCOPY = i386-elf-objcopy

QEMU = qemu-system-i386

SRC=$(shell pwd)

BIN=./bin

FLAGS=-ffreestanding -m32 -g

CSRC := $(shell find ./ -name "*.c")

CTAR := $(patsubst %.c,%.o,$(CSRC))

ASMSRC := ./Bootloader/gdt.asm ./Kernel/kernel_entry.asm

ASMTAR := $(patsubst %.asm,%.o,$(ASMSRC))

all: prebuild build

debug: prebuild build

$(OBJCP) --only-keep-debug $(BIN)/kernel.elf $(BIN)/kernel.sym

gdb -ex "target remote localhost:1234" -ex "symbol-file $(BIN)/kernel.sym"

qemu-system-x86_64 -drive format=raw,file=osimage_formated.bin,index=0,if=floppy -hda disk.img -m 128M -s -S &

prebuild: ## Prebuild instructions

rm -rf $(BIN)

mkdir $(BIN)

build: boot $(ASMTAR) $(CTAR)

$(LD) -o $(BIN)/kernel.elf -TKernel/kernel.ld $(shell find ./ -name "*.o" | xargs)

$(OBJCOPY) -O binary $(BIN)/kernel.elf $(BIN)/kernel.bin

cat $(BIN)/boot.bin $(BIN)/boot_2.bin > $(BIN)/both_boot.bin

cat $(BIN)/both_boot.bin $(BIN)/kernel.bin > $(BIN)/short.bin

cat $(BIN)/short.bin $(BIN)/zeros.bin > $(BIN)/os_image.bin

dd if=/dev/zero of=$(BIN)/osimage_formated.img bs=512 count=2880 >/dev/null

dd if=$(BIN)/os_image.bin of=$(BIN)/osimage_formated.img conv=notrunc >/dev/null

boot:

nasm Bootloader/boot.asm -f bin -o $(BIN)/boot.bin -i Bootloader

nasm Bootloader/boot_2.asm -f bin -o $(BIN)/boot_2.bin -i Bootloader

nasm Kernel/zeros.asm -f bin -o $(BIN)/zeros.bin

%.o: %.c

mkdir -p $(BIN)/$(shell dirname $<)

$(CC) $(FLAGS) -c $< -o $(BIN)/$(subst .c,.o,$<) $(addprefix -I ,$(shell dirname $(shell echo $(CSRC) | tr ' ' '\n' | sort -u | xargs)))

%.o : %.asm

mkdir -p $(BIN)/$(shell dirname $<)

nasm $< -f elf -o $(BIN)/$(subst .asm,.o,$<) $(addprefix -i ,$(shell dirname $(shell echo $(CSRC) | tr ' ' '\n' | sort -u | xargs)))

run: prebuild build

qemu-system-x86_64 -d cpu_reset -drive format=raw,file=$(BIN)/osimage_formated.img,index=0,if=floppy -m 128M