initial import of armv8-hello

Makefile

@@ -0,0 +1,37 @@
+IMAGE := kernel.elf
+
+CROSS_COMPILE = aarch64-linux-gnu-
+
+CC = $(CROSS_COMPILE)gcc
+LD = $(CROSS_COMPILE)ld
+OBJDUMP = $(CROSS_COMPILE)objdump
+
+CFLAGS = -Wall -fno-common -O0 -g \
+         -nostdlib -nostartfiles -ffreestanding \
+         -march=armv8-a
+
+OBJS = hello.o
+
+all: $(IMAGE)
+
+boot.o: boot.S
+	$(CC) boot.S -c -o boot.o
+
+$(IMAGE): kernel.ld boot.o $(OBJS)
+	$(LD) boot.o $(OBJS) -T kernel.ld -o $(IMAGE)
+	$(OBJDUMP) -d kernel.elf > kernel.list
+	$(OBJDUMP) -t kernel.elf | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > kernel.sym
+
+qemu: $(IMAGE)
+	@qemu-system-aarch64 -M ? | grep virt >/dev/null || exit
+	@echo "Press Ctrl-A and then X to exit QEMU"
+	@echo
+	qemu-system-aarch64 -machine virt -cpu cortex-a57 \
+	                    -smp 4 -m 4096 \
+			    -nographic -serial mon:stdio \
+	                    -kernel $(IMAGE)
+
+clean:
+	rm -f $(IMAGE) *.o *.list *.sym
+
+.PHONY: all qemu clean