mirror of
https://github.com/gbowne1/ClassicOS.git
synced 2025-10-26 02:15:06 -07:00
65 lines
1.5 KiB
Makefile
65 lines
1.5 KiB
Makefile
AS = nasm
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CC = gcc
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CFLAGS = -std=c11 -m32 -ffreestanding -c -fno-stack-protector -fno-pie
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LD = ld
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QEMU = qemu-system-i386
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IMG_SIZE = 1440k
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BUILD_DIR = build
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BOOT_SRC = bootloader/boot.asm
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BOOT_OBJ = $(BUILD_DIR)/boot.o
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BOOT_ELF = $(BUILD_DIR)/boot.elf
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BOOT_IMG = $(BUILD_DIR)/boot.img
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KERNEL_C_SRC = $(wildcard kernel/*.c)
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KERNEL_ASM_SRC = $(wildcard kernel/*.asm)
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KERNEL_OBJ = $(patsubst kernel/%.c, $(BUILD_DIR)/%.o, $(KERNEL_C_SRC))
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KERNEL_OBJ += $(patsubst kernel/%.asm, $(BUILD_DIR)/asm_%.o, $(KERNEL_ASM_SRC))
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KERNEL_OBJ += $(BUILD_DIR)/boot1.o
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KERNEL_ELF = $(BUILD_DIR)/kernel.elf
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KERNEL_BIN = $(BUILD_DIR)/kernel.bin
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DISK_IMG = $(BUILD_DIR)/disk.img
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all: $(BOOT_IMG) $(KERNEL_BIN) $(DISK_IMG)
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$(BUILD_DIR):
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mkdir -p $@
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$(BOOT_OBJ): $(BOOT_SRC) | $(BUILD_DIR)
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$(AS) -f elf32 -g -F dwarf -o $@ $<
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$(BOOT_ELF): $(BOOT_OBJ)
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$(LD) -Ttext=0x7c00 -melf_i386 -o $@ $<
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$(BOOT_IMG): $(BOOT_ELF)
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objcopy -O binary $< $@
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truncate -s $(IMG_SIZE) $@
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$(BUILD_DIR)/boot1.o: bootloader/boot1.asm
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$(AS) -f elf32 -o $@ $<
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$(BUILD_DIR)/asm_%.o: kernel/%.asm
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$(AS) -f elf32 -o $@ $<
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$(BUILD_DIR)/%.o: kernel/%.c
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$(CC) $(CFLAGS) $< -o $@
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$(KERNEL_BIN): $(KERNEL_OBJ) | $(BUILD_DIR)
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$(LD) -melf_i386 --oformat binary -T bootloader/linker.ld -o $@ $(KERNEL_OBJ)
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$(DISK_IMG): $(BOOT_IMG) $(KERNEL_BIN)
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dd if=$(BOOT_IMG) of=$@ bs=512 seek=4
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dd if=$(KERNEL_BIN) of=$@ bs=512 seek=200
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run: $(DISK_IMG)
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$(QEMU) -drive file=$<,format=raw,if=floppy
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.PHONY: stage1 clean
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stage1: $(BOOT_IMG)
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clean:
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rm -rf $(BUILD_DIR)
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