# Used to generated .d file that deal with header dependencies CPPFLAGS = -MMD AS=nasm ASFLAGS += -f elf32 LDFLAGS += -m elf_i386 CFLAGS += -m32 -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-pie -fno-stack-protector -fno-tree-vectorize -D__KERNEL__ #keep .i and .s #CFLAGS += -save-temps #CFLAGS += -fanalyzer -Wno-analyzer-malloc-leak -Wno-analyzer-out-of-bounds CXXFLAGS += -m32 -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-rtti -fno-pie DEBUG_FLAGS += -g -Og -DDEBUG -fno-omit-frame-pointer -fno-inline LIBGCC = $(shell $(CC) -print-libgcc-file-name $(CFLAGS)) QEMU_OPT += -hda disk.img ARCH?=x86 SUBDIRS := core drivers tests arch/$(ARCH) INCDIRS += $(foreach dir, $(SUBDIRS), -I$(dir)) CPPFLAGS += $(INCDIRS) asmsrc= asmobj=$(asmsrc:%.asm=%.o) gasmsrc=$(wildcard arch/$(ARCH)/*.S arch/$(ARCH)/boot/*.S) gasmobj=$(gasmsrc:%.S=%.o) csrc=$(shell find $(SUBDIRS) -type f -name "*.c")# $(wildcard *.c) cobj=$(csrc:%.c=%.o) cinc=$(csrc:%.c=%.i) deps=$(csrc:%.c=%.d) $(gasmsrc:%.S=%.d) docsrc=$(wildcard docs/*.md) docobj=$(docsrc:%.md=%.html) kernel kernel.sym &: $(asmobj) $(gasmobj) $(cobj) linker.ld $(LD) $(LDFLAGS) $(asmobj) $(gasmobj) $(cobj) -o kernel -T linker.ld $(LIBGCC) -Map kernel.map objcopy --only-keep-debug kernel kernel.sym objcopy --strip-debug kernel objcopy --add-gnu-debuglink=kernel.sym 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 userspace: FORCE $(MAKE) -C userspace FORCE: @ doc: $(docobj) help: ## show this help # regex for general help @sed -ne "s/^##\(.*\)/\1/p" $(MAKEFILE_LIST) # regex for makefile commands (targets) @printf "────────────────────────`tput bold``tput setaf 2` Make Commands `tput sgr0`────────────────────────────────\n" @sed -ne "/@sed/!s/\(^[^#?=]*:\).*##\(.*\)/`tput setaf 2``tput bold`\1`tput sgr0`\2/p" $(MAKEFILE_LIST) # regex for makefile variables @printf "────────────────────────`tput bold``tput setaf 4` Make Variables `tput sgr0`───────────────────────────────\n" @sed -ne "/@sed/!s/\(.*\)?=\(.*\)##\(.*\)/`tput setaf 4``tput bold`\1:`tput setaf 5`\2`tput sgr0`\3/p" $(MAKEFILE_LIST) disk.img: disk.sfdisk userspace qemu-img create -f raw $@ 32M sfdisk $@ < $< # Before having filesystem support, just dump the user prog into the first partition strip userspace/user -o userspace/user.strip $(eval file_size:=$(shell du -b userspace/user.strip|awk '{print $$1}' | xargs printf "%016d" )) \ sed '1s/^/$(file_size)/' userspace/user.strip | dd of=disk.img seek=2048 bs=512 # NASM without preprocessing %.o:%.asm $(AS) $(ASFLAGS) -o $@ $< #GNU GAS ASM with C Preprocessing %.o: %.S $(CC) $(CFLAGS) $(CPPFLAGS) -c "$<" -o "$@" %.html: %.md markdown -o $@ $< %.i: %.c $(CC) $(CFLAGS) $(CPPFLAGS) -E -c "$<" -o "$@" test: CFLAGS += -DRUN_TEST ## Run the OS on qemu with the inner test activated test: clean kernel disk.img qemu-system-x86_64 -kernel kernel -serial stdio -m 32M $(QEMU_OPT) run:kernel disk.img ## Run the OS on qemu qemu-system-x86_64 -kernel $< -serial stdio $(QEMU_OPT) debug: CFLAGS += $(DEBUG_FLAGS) ## Run the OS on qemu and attach a debugger to it (may need a clean befor to have the debug symbols) debug: CXXFLAGS += $(DEBUG_FLAGS) debug:kernel kernel.sym disk.img gdb -q -x debug.gdb debug_test: CFLAGS += $(DEBUG_FLAGS) -DRUN_TEST debug_test: debug screenshot: shutter --window=qemu -o screenshot_1.png -e && zopflipng screenshot_1.png screenshot_1.png clean: $(RM) kernel $(asmobj) $(gasmobj) $(cobj) $(deps) $(cinc) fd.iso kernel.sym kernel.map $(docobj) $(RM) -r isodir .PHONY: userspace screenshot ifneq ($(MAKECMDGOALS),clean) -include $(deps) endif