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SRC_DIR=src
INCLUDE_DIR=include
BUILD_DIR=build
K_BIN_NAME=kernel.bin
ISO_NAME=os_image.iso
CC=cc
LD=ld
AS=nasm
CFLAGS+=-std=c2x -ffreestanding -fno-stack-protector -g -Wall -Wextra -pedantic -lgcc -isystem $(INCLUDE_DIR)
CFLAGS+=-DPAGE_SIZE=4096
LDFLAGS+=-nmagic
C_SRC=$(shell find $(SRC_DIR) -type f -name "*.c")
C_OBJ=$(patsubst %.c,$(BUILD_DIR)/%.o,$(C_SRC))
H_SRC=$(shell find $(SRC_DIR) -type f -name "*.h")
H_INCLUDE=$(shell find $(INCLUDE_DIR) -type f -name "*.h")
A_SRC=$(shell find $(SRC_DIR) -type f -name "*.S")
A_OBJ=$(patsubst %.S,$(BUILD_DIR)/%.S.o,$(A_SRC))
.PHONY: all clean
all: $(BUILD_DIR)/$(ISO_NAME)
clean:
@printf "\033[31m RM \033[0m%s\n" $(BUILD_DIR)
@rm -rf $(BUILD_DIR)/*
$(A_OBJ): $(BUILD_DIR)/%.S.o : %.S
@mkdir -p $(@D)
@printf "\033[33m AS \033[0m%s\n" $<
@nasm $< -f elf64 -o $@
$(C_OBJ): $(BUILD_DIR)/%.o : %.c
@mkdir -p $(@D)
@printf "\033[34m CC \033[0m%s\n" $<
@$(CC) -c $(CFLAGS) -o $@ $<
$(BUILD_DIR)/$(K_BIN_NAME): arch/amd64/linker.ld $(A_OBJ) $(C_OBJ) $(H_SRC) $(H_INCLUDE)
@mkdir -p $(@D)
@printf "\033[32m LD \033[0m%s\n" $@
@$(LD) $(LDFLAGS) --no-warn-rwx-segments -T arch/amd64/linker.ld -o $(BUILD_DIR)/$(K_BIN_NAME) $(A_OBJ) $(C_OBJ)
$(BUILD_DIR)/$(ISO_NAME): $(BUILD_DIR)/$(K_BIN_NAME) grub.cfg
@mkdir -p $(@D)
@mkdir -p $(BUILD_DIR)/iso/boot/grub
@cp grub.cfg $(BUILD_DIR)/iso/boot/grub
@cp $(BUILD_DIR)/$(K_BIN_NAME) $(BUILD_DIR)/iso/boot
@printf "\033[35m ISO \033[0m%s\n" $(BUILD_DIR)/$(ISO_NAME)
@grub-mkrescue -o $(BUILD_DIR)/$(ISO_NAME) $(BUILD_DIR)/iso 2> /dev/null
run: all
@qemu-system-x86_64 \
-cdrom $(BUILD_DIR)/$(ISO_NAME) \
-serial stdio \
-display gtk,show-menubar=off,zoom-to-fit=on \
-m 4G \
-enable-kvm \
-name corn
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