OSNAME = KessOS

GNUEFI = ../gnu-efi
OVMFDIR = ../OVMFbin
LDS = link.ld
CC = gcc
ASMC = nasm

CFLAGS = -ffreestanding -fshort-wchar -mgeneral-regs-only
LDFLAGS = -T $(LDS) -static -Bsymbolic -nostdlib

SRCDIR := src
OBJDIR := lib
BUILDDIR = bin
BOOTEFI := $(GNUEFI)/x86_64/bootloader/main.efi

rwildcard=$(foreach d,$(wildcard $(1:=/*)),$(call rwildcard,$d,$2) $(filter $(subst *,%,$2),$d))

SRC = $(call rwildcard,$(SRCDIR),*.c)          
ASMSRC = $(call rwildcard,$(SRCDIR),*.asm)
OBJS = $(patsubst $(SRCDIR)/%.c, $(OBJDIR)/%.o, $(SRC))
OBJS += $(patsubst $(SRCDIR)/%.asm, $(OBJDIR)/%.asm.o, $(ASMSRC))
OBJS += $(call rwildcard,$(OBJDIR)/userspace,*.o)
DIRS = $(wildcard $(SRCDIR)/*)

kernel: $(OBJS) link
$(OBJDIR)/%.o: $(SRCDIR)/%.c
	@mkdir -p $(@D)
	$(CC) $(CFLAGS) -c $^ -o $@ -I src

$(OBJDIR)/%.asm.o: $(SRCDIR)/%.asm

	$(ASMC) $^ -felf64 -o $@

link:
	$(LD) $(LDFLAGS) -o $(BUILDDIR)/kernel.elf $(OBJS)

setup:
	@mkdir $(BUILDDIR)
	@mkdir $(SRCDIR)
	@mkdir $(OBJDIR)

buildimg:
	dd if=/dev/zero of=$(BUILDDIR)/$(OSNAME).img bs=512 count=93750
	mformat -i $(BUILDDIR)/$(OSNAME).img
	mmd -i $(BUILDDIR)/$(OSNAME).img ::/EFI
	mmd -i $(BUILDDIR)/$(OSNAME).img ::/EFI/BOOT
	mcopy -i $(BUILDDIR)/$(OSNAME).img $(BOOTEFI) ::/EFI/BOOT
	mcopy -i $(BUILDDIR)/$(OSNAME).img startup.nsh ::
	mcopy -i $(BUILDDIR)/$(OSNAME).img $(BUILDDIR)/kernel.elf :: 
	mcopy -i $(BUILDDIR)/$(OSNAME).img $(BUILDDIR)/zap-light16.psf :: 


run:
	qemu-system-x86_64 -drive file=$(BUILDDIR)/$(OSNAME).img -m 256M -cpu qemu64 -drive if=pflash,format=raw,unit=0,file="$(OVMFDIR)/OVMF_CODE-pure-efi.fd",readonly=on -drive if=pflash,format=raw,unit=1,file="$(OVMFDIR)/OVMF_VARS-pure-efi.fd" -net none -serial stdio -d int -no-reboot -D logfile.txt -M smm=off -soundhw pcspk

debug:
	qemu-system-x86_64 -drive file=$(BUILDDIR)/$(OSNAME).img -m 4G -cpu qemu64 -drive if=pflash,format=raw,unit=0,file="$(OVMFDIR)/OVMF_CODE-pure-efi.fd",readonly=on -drive if=pflash,format=raw,unit=1,file="$(OVMFDIR)/OVMF_VARS-pure-efi.fd" -net none -monitor stdio -d int -no-reboot -D logfile.txt -M smm=off -soundhw pcspk
