Finished implementing paging init and long mode switch

Makefile

@@ -15,6 +15,11 @@ SRC_DIRS := core
 KERNEL_C_FILES := $(foreach dir,$(SRC_DIRS),$(wildcard $(dir)/*.c))
 KERNEL_OBJ := $(addprefix $(BUILDDIR)/,$(KERNEL_C_FILES:.c=.o))
 
+BUILD_ID := $(shell tools/generate_build_id.py --arch $(ARCH))
+
+CFLAGS := -DBUILD_ID=\"$(BUILD_ID)\"
+ASMFLAGS := -DBUILD_ID=\"$(BUILD_ID)\"
+
 $(BUILDDIR)/$(KERNEL_EXEC): $(KERNEL_OBJ) $(ARCH_OBJ)
 	@echo "    \033[1;36mLINK\033[0m   \033[1m$@\033[0m"
 	@mkdir -p $(@D)