如何在Centos6中获取符号地址vmalloc_node_范围

我必须为我的模块请求

START

和

END

之间的内存

static struct kprobe kp={.symbol_name = "kallsyms_lookup_name",};

int get_kallsyms_lookup_name(void)
{
   int ret = register_kprobe(&kp);
   if(ret < 0){
   printk("[err] %s. register_kprobe failed, ret:%d\n", __FUNCTION__, ret);
   return ret;
   }
  printk("[info] %s. kprobe at addr:%p, ret:%d\n", __FUNCTION__, kp.addr, ret);
  orig_kallsyms_lookup_name = (kallsyms_lookup_name_t)(void*)kp.addr;
  unregister_kprobe(&kp);
  return ret;
}

 
static int __init init(void)
{
    if(get_kallsyms_lookup_name() < 0)
    {
      printk("[err] %s failed!\n", __FUNCTION__);
      return -1; 
}

___vmalloc_node_range = (void *)orig_kallsyms_lookup_name("__vmalloc_node");
if(!___vmalloc_node_range)
   printk("error");
   return -1;
}

#define START _AC(0xffffffffa0000000, UL)
#define END   _AC(0xffffffffff000000, UL)