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# 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
QEMU_OPT += -hda disk.img
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 arch/$(ARCH)/irq_wrappers.o arch/$(ARCH)/exception_wrappers.o
deps = $(csrc:%.c=%.d)
kernel kernel.sym &: $(asmobj) $(cobj) linker.ld
$(CC) -m32 -ffreestanding -nostdlib $(cobj) $(asmobj) -o kernel -T linker.ld -lgcc
objcopy --only-keep-debug kernel kernel.sym
objcopy --strip-debug kernel
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
disk.img:
qemu-img create -f qcow2 disk.img 32M
%.o:%.asm
$(AS) $(ASFLAGS) -o $@ $<
%.o: %.S
$(CC) "-I$(PWD)" -c "$<" $(CFLAGS) -o "$@"
test: CFLAGS += -DRUN_TEST
test: clean kernel disk.img
qemu-system-x86_64 -kernel kernel -serial stdio -m 32M $(QEMU_OPT)
run:kernel disk.img
qemu-system-x86_64 -kernel $< $(QEMU_OPT)
debug: CFLAGS += $(DEBUG_FLAGS) -DRUN_TEST
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
debug_test: CFLAGS += $(DEBUG_FLAGS) -DRUN_TEST
debug_test: debug
clean:
$(RM) kernel $(asmobj) $(cobj) $(deps) fd.iso kernel.sym
$(RM) -r isodir
ifneq ($(MAKECMDGOALS),clean)
-include $(deps)
endif