Initial Commit

Makefile

@@ -0,0 +1,56 @@
+# Toolchain
+CC = riscv64-unknown-elf-gcc
+LD = riscv64-unknown-elf-ld
+
+# Directories
+SRC_DIR = src
+BUILD_DIR = build
+OUTPUT_DIR = output
+
+# Flags
+# Added -O0 for easier debugging and -g for symbols
+CFLAGS = -Wall -Wextra -ffreestanding -nostdlib -mcmodel=medany -Iinclude -O0 -g
+LDFLAGS = -T linker.ld
+
+# 1. Find sources
+SRCS_C = $(shell find $(SRC_DIR) -name "*.c")
+SRCS_S = $(shell find $(SRC_DIR) -name "*.S")
+
+# 2. Object mapping
+OBJS_C = $(patsubst $(SRC_DIR)/%.c, $(BUILD_DIR)/%.o, $(SRCS_C))
+OBJS_S = $(patsubst $(SRC_DIR)/%.S, $(BUILD_DIR)/%.o, $(SRCS_S))
+# Put Assembly first to help the linker find _start
+OBJS   = $(OBJS_S) $(OBJS_C)
+
+# 3. List of all required build subdirectories
+OBJ_DIRS = $(sort $(dir $(OBJS)))
+
+TARGET = $(OUTPUT_DIR)/kernel.elf
+
+.PHONY: all clean run
+
+all: $(TARGET)
+
+# The final link step
+# Added -Wl, to pass LDFLAGS to the actual linker
+$(TARGET): $(OBJS) | $(OUTPUT_DIR)
+	$(CC) $(CFLAGS) -Wl,$(LDFLAGS) $(OBJS) -o $(TARGET)
+
+# Rule for C files
+$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c | $(OBJ_DIRS)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+# Rule for Assembly files
+$(BUILD_DIR)/%.o: $(SRC_DIR)/%.S | $(OBJ_DIRS)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+# Create directories using order-only prerequisites (|)
+$(OBJ_DIRS) $(OUTPUT_DIR):
+	mkdir -p $@
+
+run: all
+	clear
+	qemu-system-riscv64 -M virt -bios none -kernel $(TARGET) -nographic
+
+clean:
+	rm -rf $(BUILD_DIR) $(OUTPUT_DIR)