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OSNAME = mfsos
OSBIN = $(OSNAME).bin
KERNBIN = kernel.bin
# Available options: `bootloader`, `multiboot`
BOOT ?= bootloader
ARCH = x86
ARCH_PATH = arch/$(ARCH)
ARCH_INCLUDE = $(PWD)/arch/$(ARCH)/include
ARCH_BOOT = arch/$(ARCH)/boot/$(BOOT)
BOOTBIN = $(ARCH_BOOT)/bootloader.bin
OS_BINARIES = $(KERNBIN)
ifeq ($(BOOT), bootloader)
OS_BINARIES := $(BOOTBIN) $(OS_BINARIES)
endif
TARGET = i686-elf
TARGET_TOOLS = $(PWD)/tools/toolchain/bin/$(TARGET)-
CC = $(TARGET_TOOLS)gcc
LD = $(TARGET_TOOLS)ld
AS = $(TARGET_TOOLS)as
OBJDUMP = $(TARGET_TOOLS)objdump
KERN_HEAD = $(ARCH_BOOT)/head.o
C_SOURCES = \
kernel/main.c \
kernel/string.c \
drivers/video/console/vgacon.c \
$(ARCH_PATH)/gdt.c
OBJECTS = ${C_SOURCES:.c=.o}
export CC LD AS OBJDUMP
export ARCH_INCLUDE
.PHONY: all qemu objdump-boot objdump-kernel clean
all: $(OSBIN)
$(OSBIN): $(OS_BINARIES)
cat $^ > $@
dd if=/dev/zero bs=512 count=128 >> $@ # 65536
$(BOOTBIN) $(KERN_HEAD):
$(MAKE) -C $(ARCH_BOOT)
$(KERNBIN): $(KERN_HEAD) $(OBJECTS)
$(CC) -T $(ARCH_BOOT)/linker.ld -o $@ \
-ffreestanding -nostdlib \
$^ -lgcc
printf "Kernel size: 0x%x\n" `stat -c "%s" $@`
%.o: %.c
$(CC) -std=gnu89 -Wall -ffreestanding -nostdlib \
-I arch/$(ARCH)/include \
-I kernel \
-I drivers \
-c $< -o $@ -lgcc
qemu: $(OSBIN)
qemu-system-i386 -kernel $(OSBIN)
objdump-boot: $(BOOTBIN)
$(MAKE) -C $(ARCH_BOOT) objdump-bootsect objdump-setup
objdump-kernel: $(KERNBIN)
$(OBJDUMP) -D -m i386 -b binary \
--adjust-vma=0x1000 -Maddr32,data32 $<
clean:
$(MAKE) -C $(ARCH_BOOT) clean
rm -f $(KERNBIN) $(OSBIN) $(OBJECTS)
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