export CC = i686-elf-gcc
QEMU = qemu-system-i386 -monitor stdio
-GIT_REV = $(shell git rev-parse --short HEAD)
+export GIT_REV = $(shell git describe --long HEAD)
-CFLAGS = -std=gnu89 -g -Iinclude/arch/x86 -ffreestanding -DGIT_COMMIT=\"$(GIT_REV)\"
+CFLAGS = -std=gnu99 -g -Iinclude/arch/x86 -ffreestanding -DGIT_COMMIT=\"$(GIT_REV)\"
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
+BOOTLOADER_OBJ = boot/x86/mbr boot/x86/vbr-fat32 boot/x86/stage3/LOADER.BIN
default: kernel/kernel.elf bootloader
all: default boot/x86/disk.img
-bootloader: boot/x86/mbr boot/x86/vbr-fat32 boot/x86/stage3/LOADER.BIN
+bootloader: $(BOOTLOADER_OBJ)
run: all
$(QEMU) boot/x86/disk.img
+debug: all
+ $(QEMU) -s -S boot/x86/disk.img
+
boot/x86/mbr: boot/x86/mbr.s
- $(MAKE) -C boot/x86
boot/x86/vbr-fat32: boot/x86/vbr-fat32.s boot/x86/fat32/*.s
- $(MAKE) -C boot/x86
boot/x86/stage3/LOADER.BIN: boot/x86/stage3/*.s boot/x86/fat32/*.s
+$(BOOTLOADER_OBJ):
$(MAKE) -C boot/x86
-boot/x86/disk.img: boot/x86/mbr boot/x86/vbr-fat32 boot/x86/stage3/LOADER.BIN boot/x86/disk.dump
+boot/x86/disk.img: boot/x86/mbr boot/x86/vbr-fat32 boot/x86/stage3/LOADER.BIN boot/x86/disk.dump kernel/kernel.bin
truncate -s1G boot/x86/disk.img
sfdisk boot/x86/disk.img < boot/x86/disk.dump
mkfs.fat -F 32 --offset 2048 boot/x86/disk.img
mcopy -i boot/x86/disk.img@@1M boot/x86/stage3/LOADER.BIN ::.
mcopy -i boot/x86/disk.img@@1M kernel/kernel.bin ::./KERNEL.BIN
-kernel/kernel.bin: ${KERNEL_OBJ}
+kernel/kernel.bin: ${KERNEL_OBJ} kernel/linker.ld
$(CC) -ffreestanding -nostdlib -o $@ -T kernel/linker.ld ${KERNEL_OBJ}
kernel/entry.o: kernel/entry.s
- $(AS) -f elf kernel/entry.s -o $@
+ $(AS) -f elf $< -o $@
kernel/arch/x86/irq/sample_handler.o: kernel/arch/x86/irq/sample_handler.c
- $(CC) $(CFLAGS) -mgeneral-regs-only -c kernel/arch/x86/irq/sample_handler.c -o $@
+ $(CC) $(CFLAGS) -mgeneral-regs-only -c $< -o $@
kernel/kernel.elf: kernel/kernel.bin
$(CC) -ffreestanding -nostdlib -o $@ -T kernel/linker.ld ${KERNEL_OBJ} -Wl,--oformat=elf32-i386
+ i686-elf-objcopy --only-keep-debug kernel/kernel.elf kernel/kernel.dbg
+ i686-elf-objcopy --add-gnu-debuglink=kernel/kernel.dbg kernel/kernel.elf
+ i686-elf-strip --strip-unneeded kernel/kernel.elf
clean:
- -rm kernel/kernel.bin kernel/kernel.elf ${KERNEL_OBJ}
+ -rm kernel/kernel.{bin,dbg,elf} ${KERNEL_OBJ}
cd boot/x86 && $(MAKE) clean
-.PHONY: default all clean run bootloader
+.PHONY: default all clean run debug bootloader