TARGET = bios ifeq ($(TARGET), bios) TOOLCHAIN=i386-elf else ifeq ($(TARGET), uefi) TOOLCHAIN=x86_64-elf else $(error Invalid target) endif CC = $(TOOLCHAIN)-gcc LD = $(TOOLCHAIN)-ld OBJCOPY = $(TOOLCHAIN)-objcopy OBJDUMP = $(TOOLCHAIN)-objdump READELF = $(TOOLCHAIN)-readelf COM_OUTPUT = false E9_OUTPUT = false BUILD_ID := $(shell dd if=/dev/urandom count=8 bs=1 | od -An -t x8 | sed 's/^ /0x/') LIMINE_VERSION := $(shell git describe --exact-match --tags `git log -n1 --pretty='%h'` || git log -n1 --pretty='%h') WERROR = -Werror CFLAGS = -Os -g -pipe -Wall -Wextra $(WERROR) INTERNAL_CFLAGS := \ -std=gnu11 \ -fplan9-extensions \ -ffreestanding \ -fno-stack-protector \ -fno-omit-frame-pointer \ -fno-lto \ -Wno-address-of-packed-member \ -masm=intel \ -mgeneral-regs-only \ -MMD \ -DBUILD_ID=$(BUILD_ID) \ -DLIMINE_VERSION='"$(LIMINE_VERSION)"' \ -DCOM_OUTPUT=$(COM_OUTPUT) \ -DE9_OUTPUT=$(E9_OUTPUT) \ -D$(TARGET)=1 \ -I. \ -I.. ifeq ($(TARGET), bios) INTERNAL_CFLAGS += \ -fno-pic endif ifeq ($(TARGET), uefi) INTERNAL_CFLAGS += \ -I../gnu-efi/inc \ -I../gnu-efi/inc/x86_64 \ -fpic \ -mno-red-zone endif LDFLAGS = -Os -g INTERNAL_LDFLAGS := \ -fno-lto \ -nostdlib \ -z max-page-size=0x1000 ifeq ($(TARGET), bios) INTERNAL_LDFLAGS += \ -static \ -fno-pie \ -lgcc \ -static-libgcc endif .PHONY: all clean C_FILES := $(shell find -L ./ -type f -name '*.c' | sort) ifeq ($(TARGET), bios) ASM_FILES := $(shell find -L ./ -type f -name '*.asm' | sort) endif OBJ := $(ASM_FILES:.asm=.o) $(C_FILES:.c=.o) HEADER_DEPS := $(C_FILES:.c=.d) ifeq ($(TARGET), bios) all: limine_dbg.elf limine.sys stage2.bin stage2.bin.gz else ifeq ($(TARGET), uefi) all: BOOTX64.EFI endif BOOTX64.EFI: limine-efi.elf $(OBJCOPY) -j .text -j .sdata -j .data -j .dynamic -j .dynsym -j .rel -j .rela -j .rel.* -j .rela.* -j .reloc --target efi-app-x86_64 --subsystem=10 limine-efi.elf $@ stage2.bin.gz: stage2.bin gzip -n -9 < stage2.bin > stage2.bin.gz stage2.bin: limine.sys dd if=limine.sys bs=$$(( 0x$$($(READELF) -S limine.elf | grep .stage3.text | sed 's/^.*] //' | awk '{print $$3}' | sed 's/^0*//') - 0x8000 )) count=1 of=$@ limine.map.o: limine_nomap.elf ./gensyms.sh $(OBJDUMP) limine_nomap.elf limine limine.sys: limine.elf $(OBJCOPY) -O binary $< $@ limine_nomap.elf: $(OBJ) font.o sys/smp_trampoline.o $(CC) $(OBJ) font.o sys/smp_trampoline.o $(LDFLAGS) $(INTERNAL_LDFLAGS) -Tlinker_nomap.ld -o $@ $(CC) $(OBJ) font.o sys/smp_trampoline.o $(LDFLAGS) $(INTERNAL_LDFLAGS) -Wl,--gc-sections -Tlinker_stage2only.ld -o limine_stage2only.elf || \ ( echo "This error means that stage 2 was trying to use stage 3 symbols before loading stage 3" && \ false ) limine_dbg.elf: $(OBJ) font.o sys/smp_trampoline.o $(CC) $(OBJ) font.o sys/smp_trampoline.o $(LDFLAGS) $(INTERNAL_LDFLAGS) -Tlinker_dbg.ld -o $@ sys/smp_trampoline.o: sys/smp_trampoline.bin $(OBJCOPY) -B i8086 -I binary -O default sys/smp_trampoline.bin $@ sys/smp_trampoline.bin: sys/smp_trampoline.real nasm $< -f bin -o $@ font.o: font.bin $(OBJCOPY) -B i8086 -I binary -O default font.bin $@ limine.elf: $(OBJ) font.o sys/smp_trampoline.o limine.map.o $(CC) $(OBJ) font.o sys/smp_trampoline.o limine.map.o $(LDFLAGS) $(INTERNAL_LDFLAGS) -Tlinker.ld -o $@ limine-efi.elf: $(OBJ) font.o sys/smp_trampoline.o $(LD) -shared -Bsymbolic \ -T../gnu-efi/gnuefi/elf_x86_64_efi.lds \ ../gnu-efi/x86_64/gnuefi/crt0-efi-x86_64.o \ ../gnu-efi/x86_64/gnuefi/libgnuefi.a \ $(OBJ) font.o sys/smp_trampoline.o -o $@ -include $(HEADER_DEPS) %.o: %.c $(CC) $(CFLAGS) $(INTERNAL_CFLAGS) -c $< -o $@ %.o: %.S $(CC) $(CFLAGS) $(INTERNAL_CFLAGS) -c $< -o $@ %.o: %.asm nasm $< -F dwarf -g -f elf32 -o $@ clean: rm -f limine.elf limine_nomap.elf limine_stage2only.elf font.o limine.map.o limine.sys stage2.bin stage2.bin.gz BOOTX64.EFI sys/smp_trampoline.bin sys/smp_trampoline.o $(OBJ) $(HEADER_DEPS)