Initial Commit
This commit is contained in:
kaguya
+207
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# Nuke built-in rules.
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.SUFFIXES:
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# This is the name that our final executable will have.
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# Change as needed.
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override OUTPUT := kirkos
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# User controllable toolchain and toolchain prefix.
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TOOLCHAIN :=
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TOOLCHAIN_PREFIX :=
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ifneq ($(TOOLCHAIN),)
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ifeq ($(TOOLCHAIN_PREFIX),)
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TOOLCHAIN_PREFIX := $(TOOLCHAIN)-
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endif
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endif
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# User controllable C compiler command.
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ifneq ($(TOOLCHAIN_PREFIX),)
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CC := $(TOOLCHAIN_PREFIX)gcc
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else
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CC := cc
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endif
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# User controllable linker command.
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LD := $(TOOLCHAIN_PREFIX)ld
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# Defaults overrides for variables if using "llvm" as toolchain.
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ifeq ($(TOOLCHAIN),llvm)
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CC := clang
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LD := ld.lld
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endif
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# User controllable C flags.
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CFLAGS := -g -O2 -pipe
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# User controllable C preprocessor flags. We set none by default.
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CPPFLAGS :=
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# User controllable nasm flags.
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NASMFLAGS := -g
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ISO_ROOT := iso_root
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ISO := image.iso
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EXT2_ROOT := ext2_root
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DISK_IMG := disk.img
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# User controllable linker flags. We set none by default.
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LDFLAGS :=
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# Check if CC is Clang.
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override CC_IS_CLANG := $(shell ! $(CC) --version 2>/dev/null | grep -q '^Target: '; echo $$?)
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# If the C compiler is Clang, set the target as needed.
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ifeq ($(CC_IS_CLANG),1)
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override CC += \
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-target x86_64-unknown-none-elf
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endif
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# Internal C flags that should not be changed by the user.
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override CFLAGS += \
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-Wall \
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-Wextra \
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-std=gnu11 \
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-ffreestanding \
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-fno-stack-protector \
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-fno-stack-check \
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-fno-lto \
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-fno-PIC \
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-ffunction-sections \
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-fdata-sections \
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-m64 \
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-march=x86-64 \
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-mabi=sysv \
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-mno-80387 \
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-mno-mmx \
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-mno-sse \
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-mno-sse2 \
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-mno-red-zone \
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-mcmodel=kernel
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# Internal C preprocessor flags that should not be changed by the user.
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override CPPFLAGS := \
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-I src \
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$(CPPFLAGS) \
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-MMD \
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-MP
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# Internal nasm flags that should not be changed by the user.
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override NASMFLAGS := \
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-f elf64 \
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$(patsubst -g,-g -F dwarf,$(NASMFLAGS)) \
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-Wall
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# Internal linker flags that should not be changed by the user.
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override LDFLAGS += \
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-m elf_x86_64 \
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-nostdlib \
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-static \
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-z max-page-size=0x1000 \
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--gc-sections \
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-T linker.lds
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# Use "find" to glob all *.c, *.S, and *.asm files in the tree and obtain the
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# object and header dependency file names.
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override SRCFILES := $(shell find -L src -type f 2>/dev/null | LC_ALL=C sort)
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override CFILES := $(filter %.c,$(SRCFILES))
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override ASFILES := $(filter %.S,$(SRCFILES))
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override NASMFILES := $(filter %.asm,$(SRCFILES))
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override OBJ := $(addprefix obj/,$(CFILES:.c=.c.o) $(ASFILES:.S=.S.o) $(NASMFILES:.asm=.asm.o))
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override HEADER_DEPS := $(addprefix obj/,$(CFILES:.c=.c.d) $(ASFILES:.S=.S.d))
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# Default target. This must come first, before header dependencies.
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.PHONY: all run clean-iso iso limine debug
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all: bin/$(OUTPUT)
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LIMINE_DIR := limine
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# Include header dependencies.
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-include $(HEADER_DEPS)
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# Link rules for the final executable.
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bin/$(OUTPUT): GNUmakefile linker.lds $(OBJ)
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mkdir -p "$(dir $@)"
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$(LD) $(LDFLAGS) $(OBJ) -o $@
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# Compilation rules for *.c files.
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obj/%.c.o: %.c GNUmakefile
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mkdir -p "$(dir $@)"
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$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
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# Compilation rules for *.S files.
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obj/%.S.o: %.S GNUmakefile
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mkdir -p "$(dir $@)"
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$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
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# Compilation rules for *.asm (nasm) files.
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obj/%.asm.o: %.asm GNUmakefile
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mkdir -p "$(dir $@)"
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nasm $(NASMFLAGS) $< -o $@
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$(DISK_IMG): $(EXT2_ROOT)
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@echo "Creating ext2 disk image from $(EXT2_ROOT)..."
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dd if=/dev/zero of=$(DISK_IMG) bs=1M count=32
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mkfs.ext2 -F -L KIRKOS $(DISK_IMG)
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mkdir -p mnt
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sudo mount -o loop $(DISK_IMG) mnt
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sudo cp -r $(EXT2_ROOT)/* mnt/
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sudo umount mnt
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rmdir mnt
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@echo "Done: $(DISK_IMG) created"
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# Build ISO directory structure
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$(ISO_ROOT):
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mkdir -p $(ISO_ROOT)/boot
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mkdir -p $(ISO_ROOT)/boot/limine
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mkdir -p $(ISO_ROOT)/EFI/BOOT
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# Copy kernel
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$(ISO_ROOT)/boot/$(OUTPUT): bin/$(OUTPUT) | $(ISO_ROOT)
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cp -v bin/$(OUTPUT) $(ISO_ROOT)/boot/
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# Copy limine BIOS/UEFI files
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limine-files: | $(ISO_ROOT)
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cp -v limine.conf \
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$(LIMINE_DIR)/limine-bios.sys \
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$(LIMINE_DIR)/limine-bios-cd.bin \
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$(LIMINE_DIR)/limine-uefi-cd.bin \
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$(ISO_ROOT)/boot/limine
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cp -v $(LIMINE_DIR)/BOOTX64.EFI $(ISO_ROOT)/EFI/BOOT/
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cp -v $(LIMINE_DIR)/BOOTIA32.EFI $(ISO_ROOT)/EFI/BOOT/
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# Build ISO
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iso: all $(ISO_ROOT)/boot/$(OUTPUT) limine-files
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xorriso -as mkisofs -R -r -J \
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-b boot/limine/limine-bios-cd.bin \
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-no-emul-boot -boot-load-size 4 -boot-info-table \
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-hfsplus \
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-apm-block-size 2048 \
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--efi-boot boot/limine/limine-uefi-cd.bin \
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-efi-boot-part --efi-boot-image \
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--protective-msdos-label \
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$(ISO_ROOT) -o $(ISO)
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./$(LIMINE_DIR)/limine bios-install $(ISO)
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# Run in QEMU
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run: $(DISK_IMG) iso
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qemu-system-x86_64 -cdrom $(ISO) -hda $(DISK_IMG) -debugcon stdio -m 8G -smp 2 -device ich9-intel-hda -device hda-duplex
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debug: iso $(DISK_IMG)
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qemu-system-x86_64 \
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-cdrom $(ISO) -hda $(DISK_IMG) \
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-s -S -debugcon stdio -d int,cpu_reset -m 8G -smp 2 -device ich9-intel-hda,id=hda -device hda-duplex,id=codec0,bus=hda.0,cad=0
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# Clean ISO artifacts
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clean-iso:
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rm -rf $(ISO_ROOT) $(ISO)
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# Remove object files and the final executable.
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.PHONY: clean
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clean:
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rm -rf bin obj $(DISK_IMG)
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