# Used to generated .d file that deal with header dependencies CPPFLAGS = -MMD AS=nasm ASFLAGS += -f elf32 #LDFLAGS += -m32 -nostdlib -mkernel -fno-stack-protector LDFLAGS += -m32 -nostdlib -static -fno-common -fno-use-cxa-atexit -fno-exceptions -fno-non-call-exceptions -fno-weak -fno-rtti -fno-stack-protector CFLAGS += -m32 -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-pie -fno-stack-protector -fno-tree-vectorize CXXFLAGS += -m32 -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-rtti -fno-pie DEBUG_FLAGS += -g -Og -DDEBUG -fno-omit-frame-pointer -fno-inline ARCH?=x86 SUBDIRS := core drivers tests arch/$(ARCH) CPPFLAGS += $(foreach dir, $(SUBDIRS), -I$(dir)) asmsrc=$(wildcard arch/$(ARCH)/boot/*.asm) asmobj=$(asmsrc:%.asm=%.o) csrc=$(shell find $(SUBDIRS) -type f -name "*.c")# $(wildcard *.c) cobj=$(csrc:%.c=%.o) arch/$(ARCH)/cpu_context_switch.o arch/$(ARCH)/irq_pit.o deps = $(csrc:%.c=%.d) kernel:$(asmobj) $(cobj) linker.ld $(CC) -m32 -ffreestanding -nostdlib $(cobj) $(asmobj) -o $@ -T linker.ld -lgcc -no-pie objcopy --only-keep-debug $@ $@.sym objcopy --strip-debug $@ fd.iso: kernel mkdir -p isodir/boot/grub cp $< isodir/boot/ @printf "menuentry \"myos\" {\n\tmultiboot /boot/kernel\n}" > isodir/boot/grub/grub.cfg grub-mkrescue -o $@ isodir #https://gcc.gnu.org/onlinedocs/gcc/x86-Function-Attributes.html#x86-Function-Attributes arch/$(ARCH)/exception_handler.o:arch/$(ARCH)/exception_handler.c $(CC) $(CFLAGS) $(CPPFLAGS) -mgeneral-regs-only -c $< -o $@ arch/$(ARCH)/irq_handler.o:arch/$(ARCH)/irq_handler.c $(CC) $(CFLAGS) $(CPPFLAGS) -mgeneral-regs-only -c $< -o $@ %.o:%.asm $(AS) $(ASFLAGS) -o $@ $< %.o: %.S $(CC) "-I$(PWD)" -c "$<" $(CFLAGS) -o "$@" self_test: CFLAGS += -DRUN_TEST -DDEBUG self_test: clean kernel qemu-system-x86_64 -kernel kernel -serial stdio test:kernel qemu-system-x86_64 -kernel $< debug: CFLAGS += $(DEBUG_FLAGS) debug: CXXFLAGS += $(DEBUG_FLAGS) debug:kernel kernel.sym #qemu-system-x86_64 -s -S -kernel kernel& #qemu-system-i386 -s -S -kernel kernel& #gdb -s kernel.sym -ex "target remote localhost:1234" -ex "dir core:driver:arch/$(ARCH))'" gdb -x debug.gdb clean: $(RM) kernel $(asmobj) $(cobj) $(deps) fd.iso kernel.sym $(RM) -r isodir ifneq ($(MAKECMDGOALS),clean) -include $(deps) endif