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Delete bootloader/Makefile

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Remove Makefile in bootloader
This commit is contained in:
Gregory Kenneth Bowne
2025-11-14 14:15:51 -08:00
committed by GitHub
parent 0e011c1682
commit 2ab0efdee1
1 changed files with 0 additions and 125 deletions
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125
bootloader/Makefile
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@@ -1,125 +0,0 @@
# Makefile – ClassicOS
# ------------------------------------------------------------
# Targets:
# all → build the final floppy image (os.img)
# run → build + launch in QEMU
# clean → remove all generated files
# ------------------------------------------------------------
# Tools
NASM := nasm
GCC := i686-elf-gcc
LD := i686-elf-ld
OBJCOPY := i686-elf-objcopy
QEMU := qemu-system-i386
DD := dd
MKDIR := mkdir -p
RM := rm -rf
# Directories
BOOTDIR := bootloader
KERNDIR := kernel
OBJDIR := obj
IMGDIR := img
# ----------------------------------------------------------------
# Bootloader sources
# ----------------------------------------------------------------
BOOT_ASM := $(BOOTDIR)/boot.asm $(BOOTDIR)/boot1.asm
BOOT_OBJ := $(OBJDIR)/boot.o $(OBJDIR)/boot1.o
# ----------------------------------------------------------------
# Kernel sources (C + asm)
# ----------------------------------------------------------------
KERN_C := $(wildcard $(KERNDIR)/*.c)
KERN_ASM := $(wildcard $(KERNDIR)/*.asm)
KERN_OBJ := $(patsubst $(KERNDIR)/%.c,$(OBJDIR)/%.o,$(KERN_C)) \
$(patsubst $(KERNDIR)/%.asm,$(OBJDIR)/%.o,$(KERN_ASM))
# ----------------------------------------------------------------
# Flags
# ----------------------------------------------------------------
NASMFLAGS := -f elf32
CFLAGS := -std=gnu99 -ffreestanding -Wall -Wextra \
-nostdinc -nostdlib -fno-builtin -fno-stack-protector \
-m32 -I$(KERNDIR)
LDFLAGS := -T $(BOOTDIR)/linker.ld -m elf_i386 -nostdlib
# ----------------------------------------------------------------
# Final artefacts
# ----------------------------------------------------------------
IMG := $(IMGDIR)/os.img
KERNEL_BIN := $(OBJDIR)/kernel.bin
BOOT_BIN := $(OBJDIR)/boot.bin
BOOT1_BIN := $(OBJDIR)/boot1.bin
# ----------------------------------------------------------------
# Phony targets
# ----------------------------------------------------------------
.PHONY: all clean run dirs
# ----------------------------------------------------------------
# Default
# ----------------------------------------------------------------
all: dirs $(IMG)
# ----------------------------------------------------------------
# Create needed directories
# ----------------------------------------------------------------
dirs:
$(MKDIR) $(OBJDIR) $(IMGDIR)
# ----------------------------------------------------------------
# 1. First-stage bootloader (512 bytes, raw binary)
# ----------------------------------------------------------------
$(OBJDIR)/boot.o: $(BOOTDIR)/boot.asm
$(NASM) -f bin -o $@ $<
# ----------------------------------------------------------------
# 2. Second-stage bootloader (ELF → raw binary)
# ----------------------------------------------------------------
$(OBJDIR)/boot1.o: $(BOOTDIR)/boot1.asm
$(NASM) $(NASMFLAGS) -o $@ $<
$(BOOT1_BIN): $(OBJDIR)/boot1.o
$(LD) -Ttext=0x7E00 --oformat binary -o $@ $<
# ----------------------------------------------------------------
# 3. Kernel (C + asm → ELF → raw binary)
# ----------------------------------------------------------------
$(OBJDIR)/%.o: $(KERNDIR)/%.c
$(GCC) $(CFLAGS) -c -o $@ $<
$(OBJDIR)/%.o: $(KERNDIR)/%.asm
$(NASM) $(NASMFLAGS) -o $@ $<
$(OBJDIR)/kernel.elf: $(KERN_OBJ)
$(LD) $(LDFLAGS) -o $@ $^
$(KERNEL_BIN): $(OBJDIR)/kernel.elf
$(OBJCOPY) -O binary $@ $<
# ----------------------------------------------------------------
# 4. Build the final floppy image
# • 2880 sectors (1.44 MiB floppy)
# • sector 0 → boot (MBR)
# • sector 1–4 → boot1 (4 × 512 = 2 KB)
# • sector 5–20 → kernel (16 sectors = 8 KB)
# ----------------------------------------------------------------
$(IMG): $(OBJDIR)/boot.o $(BOOT1_BIN) $(KERNEL_BIN)
$(DD) if=/dev/zero of=$@ bs=512 count=2880
$(DD) if=$(OBJDIR)/boot.o of=$@ conv=notrunc bs=512 count=1
$(DD) if=$(BOOT1_BIN) of=$@ conv=notrunc bs=512 seek=1 count=4
$(DD) if=$(KERNEL_BIN) of=$@ conv=notrunc bs=512 seek=5 count=16
# ----------------------------------------------------------------
# Run in QEMU
# ----------------------------------------------------------------
run: all
$(QEMU) -fda $(IMG) -boot a
# ----------------------------------------------------------------
# Clean
# ----------------------------------------------------------------
clean:
$(RM) $(OBJDIR) $(IMGDIR)