Initial commit: SUB-OS 64-Bit Production Monolithic Operating System with LazyBox userland suite

Makefile

@@ -0,0 +1,114 @@
+# =============================================================================
+# SUB-OS Master Makefile - Modular Monolithic Linux-Like Kernel Build System
+# =============================================================================
+
+# Cross Compiler & Toolchain Detection
+CROSS_COMPILE ?= x86_64-elf-
+
+CC      = $(CROSS_COMPILE)gcc
+LD      = $(CROSS_COMPILE)ld
+OBJCOPY = $(CROSS_COMPILE)objcopy
+ASM     = nasm
+
+# Build Directories
+BUILD_DIR = build
+BOOT_DIR  = boot
+
+# Target Architecture Flags
+CFLAGS = -ffreestanding \
+         -mno-red-zone \
+         -mno-mmx \
+         -mno-sse \
+         -mno-sse2 \
+         -mcmodel=kernel \
+         -Wall \
+         -Wextra \
+         -Wno-unused-function \
+         -Wno-unused-parameter \
+         -O2 \
+         -Iinclude
+
+ASMFLAGS_ELF  = -f elf64
+ASMFLAGS_BOOT = -f bin -I$(BOOT_DIR)/
+
+LDFLAGS = -nostdlib -T linker.ld
+
+# Source Files Discovery
+ARCH_C_SRCS     = $(shell find arch -name '*.c' 2>/dev/null)
+ARCH_ASM_SRCS   = $(shell find arch -name '*.asm' 2>/dev/null)
+KERNEL_C_SRCS   = $(shell find kernel -name '*.c' 2>/dev/null)
+MM_C_SRCS       = $(shell find mm -name '*.c' 2>/dev/null)
+DRIVERS_C_SRCS  = $(shell find drivers -name '*.c' 2>/dev/null)
+FS_C_SRCS       = $(shell find fs -name '*.c' 2>/dev/null)
+NET_C_SRCS      = $(shell find net -name '*.c' 2>/dev/null)
+CRYPTO_C_SRCS   = $(shell find crypto -name '*.c' 2>/dev/null)
+LIB_C_SRCS      = $(shell find lib -name '*.c' 2>/dev/null)
+USERLAND_C_SRCS = $(shell find userland -name '*.c' 2>/dev/null)
+
+ALL_C_SRCS = $(ARCH_C_SRCS) $(KERNEL_C_SRCS) $(MM_C_SRCS) $(DRIVERS_C_SRCS) \
+             $(FS_C_SRCS) $(NET_C_SRCS) $(CRYPTO_C_SRCS) $(LIB_C_SRCS) $(USERLAND_C_SRCS)
+
+# Object Files Mapping
+C_OBJS   = $(patsubst %.c, $(BUILD_DIR)/%.o, $(ALL_C_SRCS))
+ASM_OBJS = $(patsubst %.asm, $(BUILD_DIR)/%.o, $(ARCH_ASM_SRCS))
+
+# Put entry.o first in linker sequence
+ENTRY_OBJ = $(BUILD_DIR)/arch/x86_64/boot/entry.o
+OTHER_OBJS = $(filter-out $(ENTRY_OBJ), $(ASM_OBJS) $(C_OBJS))
+
+IMAGE = SUB-OS.img
+
+.PHONY: all clean run debug info
+
+all: $(IMAGE)
+
+# Assemble 16-bit Bootloader Stage 1
+$(BUILD_DIR)/boot/boot.bin: $(BOOT_DIR)/boot.asm | $(BUILD_DIR)/boot
+	$(ASM) $(ASMFLAGS_BOOT) $< -o $@
+
+# Assemble 16/32/64-bit Bootloader Stage 2
+$(BUILD_DIR)/boot/stage2.bin: $(BOOT_DIR)/stage2.asm $(BOOT_DIR)/gdt.asm | $(BUILD_DIR)/boot
+	$(ASM) $(ASMFLAGS_BOOT) $< -o $@
+
+# Compile 64-bit C source files
+$(BUILD_DIR)/%.o: %.c
+	@mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+# Assemble 64-bit ASM source files
+$(BUILD_DIR)/%.o: %.asm
+	@mkdir -p $(dir $@)
+	$(ASM) $(ASMFLAGS_ELF) $< -o $@
+
+# Link Kernel ELF
+$(BUILD_DIR)/kernel.elf: $(ENTRY_OBJ) $(OTHER_OBJS) linker.ld
+	$(LD) $(LDFLAGS) -o $@ $(ENTRY_OBJ) $(OTHER_OBJS)
+
+# Convert ELF to Flat Binary
+$(BUILD_DIR)/kernel.bin: $(BUILD_DIR)/kernel.elf
+	$(OBJCOPY) -O binary $< $@
+
+# Create Bootable Floppy / HDD Raw Disk Image
+$(IMAGE): $(BUILD_DIR)/boot/boot.bin $(BUILD_DIR)/boot/stage2.bin $(BUILD_DIR)/kernel.bin
+	dd if=/dev/zero of=$@ bs=512 count=2880 status=none
+	dd if=$(BUILD_DIR)/boot/boot.bin of=$@ bs=512 conv=notrunc status=none
+	dd if=$(BUILD_DIR)/boot/stage2.bin of=$@ bs=512 seek=1 conv=notrunc status=none
+	dd if=$(BUILD_DIR)/kernel.bin of=$@ bs=512 seek=16 conv=notrunc status=none
+	@echo "=== [SUB-OS Disk Image Built Successfully: $@ (Size: $$(du -h $@ | cut -f1))] ==="
+
+$(BUILD_DIR)/boot:
+	mkdir -p $(BUILD_DIR)/boot
+
+run: $(IMAGE)
+	qemu-system-x86_64 -drive format=raw,file=$(IMAGE) -nic model=e1000 -serial stdio
+
+debug: $(IMAGE)
+	qemu-system-x86_64 -drive format=raw,file=$(IMAGE) -nic model=e1000 -serial stdio -s -S
+
+info:
+	@echo "C Sources:   $(words $(ALL_C_SRCS)) files"
+	@echo "ASM Sources: $(words $(ARCH_ASM_SRCS)) files"
+	@echo "Target:      $(IMAGE)"
+
+clean:
+	rm -rf $(BUILD_DIR) $(IMAGE)