Makefile

   1 export AS = yasm
   2 export CC = i686-elf-gcc
   3 QEMU = qemu-system-i386 -monitor stdio
   4
   5 export GIT_REV = $(shell git describe --long HEAD)
   6
   7 CFLAGS = -std=gnu89 -g -Iinclude/arch/x86 -ffreestanding -DGIT_COMMIT=\"$(GIT_REV)\"
   8
   9 KERNEL_OBJ = kernel/entry.o kernel/arch/x86/tty/tty.o kernel/drivers/irq/i8259a.o kernel/arch/x86/irq/idt.o kernel/arch/x86/irq/sample_handler.o kernel/kernel.o
  10 BOOTLOADER_OBJ = boot/x86/mbr boot/x86/vbr-fat32 boot/x86/stage3/LOADER.BIN
  11
  12 default: kernel/kernel.elf bootloader
  13
  14 all: default boot/x86/disk.img
  15
  16 bootloader: $(BOOTLOADER_OBJ)
  17
  18 run: all
  19         $(QEMU) boot/x86/disk.img
  20
  21 boot/x86/mbr: boot/x86/mbr.s
  22 boot/x86/vbr-fat32: boot/x86/vbr-fat32.s boot/x86/fat32/*.s
  23 boot/x86/stage3/LOADER.BIN: boot/x86/stage3/*.s boot/x86/fat32/*.s
  24 $(BOOTLOADER_OBJ):
  25         $(MAKE) -C boot/x86
  26
  27 boot/x86/disk.img: boot/x86/mbr boot/x86/vbr-fat32 boot/x86/stage3/LOADER.BIN boot/x86/disk.dump kernel/kernel.bin
  28         truncate -s1G boot/x86/disk.img
  29         sfdisk boot/x86/disk.img < boot/x86/disk.dump
  30         mkfs.fat -F 32 --offset 2048 boot/x86/disk.img
  31         dd if=boot/x86/mbr of=boot/x86/disk.img bs=440 count=1 conv=notrunc
  32         dd if=boot/x86/vbr-fat32 of=boot/x86/disk.img bs=1 skip=90 seek=1048666 conv=notrunc
  33         mcopy -i boot/x86/disk.img@@1M boot/x86/stage3/LOADER.BIN ::.
  34         mcopy -i boot/x86/disk.img@@1M kernel/kernel.bin ::./KERNEL.BIN
  35
  36 kernel/kernel.bin: ${KERNEL_OBJ} kernel/linker.ld
  37         $(CC) -ffreestanding -nostdlib -o $@ -T kernel/linker.ld ${KERNEL_OBJ}
  38
  39 kernel/entry.o: kernel/entry.s
  40         $(AS) -f elf $< -o $@
  41
  42 kernel/arch/x86/irq/sample_handler.o: kernel/arch/x86/irq/sample_handler.c
  43         $(CC) $(CFLAGS) -mgeneral-regs-only -c $< -o $@
  44
  45 kernel/kernel.elf: kernel/kernel.bin
  46         $(CC) -ffreestanding -nostdlib -o $@ -T kernel/linker.ld ${KERNEL_OBJ} -Wl,--oformat=elf32-i386
  47         i686-elf-objcopy --only-keep-debug kernel/kernel.elf kernel/kernel.dbg
  48         i686-elf-objcopy --add-gnu-debuglink=kernel/kernel.dbg kernel/kernel.elf
  49         i686-elf-strip --strip-unneeded kernel/kernel.elf
  50
  51 clean:
  52         -rm kernel/kernel.{bin,dbg,elf} ${KERNEL_OBJ}
  53         cd boot/x86 && $(MAKE) clean
  54
  55 .PHONY: default all clean run bootloader