我'm making a very simple hello world kernel module and getting some crazy behavior. This worked until I upgraded to kernel 3.3.8 and now it... Well, it'在退出时调用 init
函数,在初始化时调用 exit
函数 . 我确保我的名字是正确的
// Needed for module definitions
#include <linux/module.h>
// Needed for initilization modules
#include <linux/init.h>
// Must declare some license
MODULE_LICENSE("Dual BSD/GPL");
// Function to be called on insmod
// Returns 0 on success
static int __init mymod_init(void)
{
// Prints kernel alert. Check /var/log/syslog
printk(KERN_ALERT "Module was loaded, this is the printk.");
return 0;
}
// Function to be called on rmmod
static void __exit mymod_exit(void)
{
// Prints kernel alert. Check /var/log/syslog
printk(KERN_ALERT "Module was unloaded, this is the printk");
}
// Register these functions
module_init(mymod_init);
module_exit(mymod_exit);
样本输出:
root @ cop4610:/home/cop4610/Downloads/linux-3.3.8/mymodule#insmod mymodule.ko root @ cop4610:/home/cop4610/Downloads/linux-3.3.8/mymodule#tail / var / log / syslog 10月12日10:08:20 cop4610内核:[633.567832]模块已卸载,这是printk
以下是现场直播的视频:http://www.youtube.com/watch?v=8aJNSpCd7as&feature=youtu.be
2 回答
它需要换行!!!!!! Arrggg!
和
它似乎并没有真正按顺序执行,它只是出现了,因为第一个没有出现,直到第二个发布,因为缓冲区没有刷新 .
这是我的基本例子:
我的基本Makefile: