Load ELF kernel instead of flat binary

[nameless-os.git] / Makefile

diff --git a/Makefile b/Makefile
index 9d95b1ef97134bcebc837fe4ab4cfab1e6fff45a..f254d0c8ed42952a44a7d1cd42ad6c699b727b63 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,18 +1,55 @@
-AS = yasm # choose yasm or nasm here
-ASFLAGS = -f bin # compile a raw binary
+export AS = yasm
+ASFLAGS = -g dwarf2 -f elf
+export CC = i686-elf-gcc
+QEMU = qemu-system-i386 -monitor stdio
 
-boot: boot.s print.s
-       $(AS) $(ASFLAGS) -o $@ boot.s
+export GIT_REV = $(shell git describe --long HEAD)
 
-clean:
-       -rm boot
+CFLAGS = -g -fgnu89-inline -Ikernel/include -Ikernel/include/arch/x86 -ffreestanding -DGIT_COMMIT=\"$(GIT_REV)\"
+
+KERNEL_OBJ = kernel/entry.o kernel/arch/x86/halt.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 boot/x86/stage3/loader.elf
+
+default: kernel/kernel.elf bootloader
+
+all: default boot/x86/disk.img
+
+bootloader: $(BOOTLOADER_OBJ)
 
-run:
-       qemu-system-i386 boot
+run: all
+       $(QEMU) boot/x86/disk.img
 
-help:
-       @echo "Run 'make' to compile."
-       @echo "Run 'make clean' to delete compiled objects."
-       @echo "Run 'make run' to run the compiled object. Must have qemu-system-i386 (but x86_64 should work too)."
+debug: all
+       $(QEMU) -s -S boot/x86/disk.img
+
+boot/x86/mbr: boot/x86/mbr.s
+boot/x86/vbr-fat32: boot/x86/vbr-fat32.s boot/x86/fat32/*.s 
+boot/x86/stage3/LOADER.BIN: boot/x86/stage3/*.s boot/x86/stage3/*.c boot/x86/fat32/*.s boot/x86/stage3/stage3.ld
+boot/x86/stage3/loader.elf: boot/x86/stage3/*.s boot/x86/stage3/*.c boot/x86/fat32/*.s boot/x86/stage3/stage3.ld
+$(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 kernel/kernel.elf
+       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
+       dd if=boot/x86/mbr of=boot/x86/disk.img bs=440 count=1 conv=notrunc
+       dd if=boot/x86/vbr-fat32 of=boot/x86/disk.img bs=1 skip=90 seek=1048666 conv=notrunc
+       mcopy -i boot/x86/disk.img@@1M boot/x86/stage3/LOADER.BIN ::.
+       mcopy -i boot/x86/disk.img@@1M kernel/kernel.elf ::./KERNEL.ELF
+
+kernel/arch/x86/irq/sample_handler.o: kernel/arch/x86/irq/sample_handler.c
+       $(CC) $(CFLAGS) -mgeneral-regs-only -c $< -o $@
+
+kernel/kernel.elf: $(KERNEL_OBJ)
+       $(CC) -ffreestanding -nostdlib -o $@ -T kernel/linker.ld ${KERNEL_OBJ} -lgcc
+       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.{dbg,elf} ${KERNEL_OBJ}
+       cd boot/x86 && $(MAKE) clean
 
-.PHONY = clean run help
+.PHONY: default all clean run debug bootloader