143 lines
3.4 KiB
Makefile
143 lines
3.4 KiB
Makefile
TARGET = bios
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ifeq ($(TARGET), bios)
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TOOLCHAIN=i386-elf
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else ifeq ($(TARGET), uefi)
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TOOLCHAIN=x86_64-elf
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else
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$(error Invalid toolchain)
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endif
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CC = $(TOOLCHAIN)-gcc
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LD = $(TOOLCHAIN)-gcc
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OBJCOPY = $(TOOLCHAIN)-objcopy
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OBJDUMP = $(TOOLCHAIN)-objdump
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READELF = $(TOOLCHAIN)-readelf
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COM_OUTPUT = false
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E9_OUTPUT = false
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BUILD_ID := $(shell dd if=/dev/urandom count=8 bs=1 | od -An -t x8 | sed 's/^ /0x/')
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LIMINE_VERSION := $(shell git describe --exact-match --tags `git log -n1 --pretty='%h'` || git log -n1 --pretty='%h')
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WERROR = -Werror
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CFLAGS = -Os -pipe -Wall -Wextra $(WERROR)
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INTERNAL_CFLAGS := \
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-std=gnu11 \
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-fplan9-extensions \
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-ffreestanding \
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-fno-stack-protector \
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-fno-pic \
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-fno-omit-frame-pointer \
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-fno-lto \
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-Wno-address-of-packed-member \
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-masm=intel \
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-mgeneral-regs-only \
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-MMD \
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-DBUILD_ID=$(BUILD_ID) \
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-DLIMINE_VERSION='"$(LIMINE_VERSION)"' \
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-DCOM_OUTPUT=$(COM_OUTPUT) \
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-DE9_OUTPUT=$(E9_OUTPUT) \
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-D$(TARGET)=1 \
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-I. \
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-I..
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ifeq ($(TARGET), uefi)
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INTERNAL_CFLAGS += \
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-I../gnu-efi/inc \
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-I../gnu-efi/inc/x86_64 \
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-fpic \
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-fshort-wchar \
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-mno-red-zone \
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-mcmodel=small
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endif
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LDFLAGS = -Os
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INTERNAL_LDFLAGS := \
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-fno-lto \
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-nostdlib \
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-z max-page-size=0x1000
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ifeq ($(TARGET), bios)
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INTERNAL_LDFLAGS += \
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-static \
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-no-pie \
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-lgcc \
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-static-libgcc
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else ifeq ($(TARGET), uefi)
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INTERNAL_LDFLAGS += \
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-shared \
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-z nocombreloc \
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-Wl,-Bsymbolic
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endif
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.PHONY: all clean
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C_FILES := $(shell find -L ./ -type f -name '*.c' | sort)
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ifeq ($(TARGET), bios)
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ASM_FILES := $(shell find -L ./ -type f -name '*.asm' | sort)
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endif
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OBJ := $(ASM_FILES:.asm=.o) $(C_FILES:.c=.o)
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ifeq ($(TARGET), uefi)
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OBJ += sys/smp_trampoline.o ../gnu-efi/lib/x86_64/efi_stub.o
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endif
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HEADER_DEPS := $(C_FILES:.c=.d)
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ifeq ($(TARGET), bios)
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all: limine.sys stage2.bin stage2.bin.gz
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else ifeq ($(TARGET), uefi)
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all: BOOTX64.EFI
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endif
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BOOTX64.EFI: limine.elf
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$(OBJCOPY) -I elf64-x86-64 -O efi-app-x86_64 limine.elf $@
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stage2.bin.gz: stage2.bin
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gzip -n -9 < stage2.bin > stage2.bin.gz
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stage2.bin: limine.sys
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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=$@
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limine.map.o: limine_nomap.elf
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ifeq ($(TARGET), bios)
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./gensyms.sh $(OBJDUMP) limine_nomap.elf limine
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else ifeq ($(TARGET), uefi)
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./gensyms64.sh $(OBJDUMP) limine_nomap.elf limine
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endif
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limine.sys: limine.elf
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$(OBJCOPY) -O binary $< $@
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limine_nomap.elf: $(OBJ)
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$(LD) $(OBJ) font.o $(LDFLAGS) $(INTERNAL_LDFLAGS) -Tlinker_nomap_$(TARGET).ld -o $@
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ifeq ($(TARGET), bios)
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$(LD) $(OBJ) font.o $(LDFLAGS) $(INTERNAL_LDFLAGS) -Wl,--gc-sections -Tlinker_stage2only.ld -o limine_stage2only.elf || \
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( echo "This error means that stage 2 was trying to use stage 3 symbols before loading stage 3" && \
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false )
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endif
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font.o:
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$(OBJCOPY) -B i8086 -I binary -O default font.bin $@
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limine.elf: $(OBJ) font.o limine.map.o
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$(LD) $(OBJ) font.o limine.map.o $(LDFLAGS) $(INTERNAL_LDFLAGS) -Tlinker_$(TARGET).ld -o $@
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-include $(HEADER_DEPS)
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%.o: %.c
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$(CC) $(CFLAGS) $(INTERNAL_CFLAGS) -c $< -o $@
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%.o: %.S
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$(CC) $(CFLAGS) $(INTERNAL_CFLAGS) -c $< -o $@
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ifeq ($(TARGET), bios)
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%.o: %.asm
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nasm $< -f elf32 -o $@
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else ifeq ($(TARGET), uefi)
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%.o: %.asm
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nasm $< -f elf64 -o $@
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endif
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clean:
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rm -f limine.elf limine_nomap.elf limine_stage2only.elf font.o limine.map.o limine.sys stage2.bin stage2.bin.gz BOOTX64.EFI $(OBJ) $(HEADER_DEPS)
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