Makefile

   1 export AS = yasm
   2 export CC = i686-elf-gcc
   3 QEMU = qemu-system-i386 -monitor stdio
   4
   5 export GIT_REV = $(shell git describe --long HEAD)
   6
   7 CFLAGS = -g -fgnu89-inline -Iinclude/arch/x86 -ffreestanding -DGIT_COMMIT=\"$(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
  11 BOOTLOADER_OBJ = boot/x86/mbr boot/x86/vbr-fat32 boot/x86/stage3/LOADER.BIN boot/x86/stage3/loader.elf
  12
  13 default: kernel/kernel.elf bootloader
  14
  15 all: default boot/x86/disk.img
  16
  17 bootloader: $(BOOTLOADER_OBJ)
  18
  19 run: all
  20         $(QEMU) boot/x86/disk.img
  21
  22 boot/x86/mbr: boot/x86/mbr.s
  23 boot/x86/vbr-fat32: boot/x86/vbr-fat32.s boot/x86/fat32/*.s
  24 boot/x86/stage3/LOADER.BIN: boot/x86/stage3/*.s boot/x86/stage3/*.c boot/x86/fat32/*.s
  25 boot/x86/stage3/loader.elf: boot/x86/stage3/*.s boot/x86/stage3/*.c boot/x86/fat32/*.s
  26 $(BOOTLOADER_OBJ):
  27         $(MAKE) -C boot/x86
  28
  29 boot/x86/disk.img: boot/x86/mbr boot/x86/vbr-fat32 boot/x86/stage3/LOADER.BIN boot/x86/disk.dump kernel/kernel.bin
  30         truncate -s1G boot/x86/disk.img
  31         sfdisk boot/x86/disk.img < boot/x86/disk.dump
  32         mkfs.fat -F 32 --offset 2048 boot/x86/disk.img
  33         dd if=boot/x86/mbr of=boot/x86/disk.img bs=440 count=1 conv=notrunc
  34         dd if=boot/x86/vbr-fat32 of=boot/x86/disk.img bs=1 skip=90 seek=1048666 conv=notrunc
  35         mcopy -i boot/x86/disk.img@@1M boot/x86/stage3/LOADER.BIN ::.
  36         mcopy -i boot/x86/disk.img@@1M kernel/kernel.bin ::./KERNEL.BIN
  37
  38 kernel/kernel.bin: ${KERNEL_OBJ} kernel/linker.ld
  39         $(CC) -ffreestanding -nostdlib -o $@ -T kernel/linker.ld ${KERNEL_OBJ}
  40
  41 kernel/entry.o: kernel/entry.s
  42         $(AS) -f elf $< -o $@
  43
  44 kernel/arch/x86/irq/sample_handler.o: kernel/arch/x86/irq/sample_handler.c
  45         $(CC) $(CFLAGS) -mgeneral-regs-only -c $< -o $@
  46
  47 kernel/kernel.elf: kernel/kernel.bin
  48         $(CC) -ffreestanding -nostdlib -o $@ -T kernel/linker.ld ${KERNEL_OBJ} -Wl,--oformat=elf32-i386
  49         i686-elf-objcopy --only-keep-debug kernel/kernel.elf kernel/kernel.dbg
  50         i686-elf-objcopy --add-gnu-debuglink=kernel/kernel.dbg kernel/kernel.elf
  51         i686-elf-strip --strip-unneeded kernel/kernel.elf
  52
  53 clean:
  54         -rm kernel/kernel.{bin,dbg,elf} ${KERNEL_OBJ}
  55         cd boot/x86 && $(MAKE) clean
  56
  57 .PHONY: default all clean run bootloader