我自己在linux 6.0编译内核,如下如我的内核源码:
文件名:kernel.c
代码:
#include <linux/module.h>
#include <net/sock.h>
#include <linux/netlink.h>
#include <linux/skbuff.h>
#define NETLINK_USER 31
struct sock *nl_sk = NULL;
static void hello_nl_recv_msg(struct sk_buff *skb)
{
struct nlmsghdr *nlh;
int pid;
struct sk_buff *skb_out;
int msg_size;
char *msg = "Hello from kernel";
int res;
printk(KERN_INFO "Entering: %s\n", __FUNCTION__);
msg_size = strlen(msg);
nlh = (struct nlmsghdr *)skb->data;
printk(KERN_INFO "Netlink received msg payload:
%s\n", (char *)nlmsg_data(nlh));
pid = nlh->nlmsg_pid; /*pid of sending process */
skb_out = nlmsg_new(msg_size, 0);
if (!skb_out)
{
printk(KERN_ERR "Failed to allocate new skb\n");
return;
}
nlh = nlmsg_put(skb_out, 0, 0, NLMSG_DONE, msg_size, 0);
NETLINK_CB(skb_out).dst_group = 0; /* not in mcast group */
strncpy(nlmsg_data(nlh), msg, msg_size);
res = nlmsg_unicast(nl_sk, skb_out, pid);
if (res < 0)
printk(KERN_INFO "Error while sending bak to user\n");
}
static int __init hello_init(void)
{
printk("Entering: %s\n", __FUNCTION__);
nl_sk = netlink_kernel_create(&init_net, NETLINK_USER, 0, hello_nl_recv_msg,
NULL, THIS_MODULE);
if (!nl_sk)
{
printk(KERN_ALERT "Error creating socket.\n");
return -10;
}
return 0;
}
static void __exit hello_exit(void)
{
printk(KERN_INFO "exiting hello module\n");
netlink_kernel_release(nl_sk);
}
module_init(hello_init); module_exit(hello_exit);
MODULE_LICENSE("GPL");
文件名:Makefile
代码:
obj-m = kernel.o
KVERSION = $(shell uname -r)
all:
make -C /lib/modules/$(KVERSION)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(KVERSION)/build M=$(PWD) clean
当我一次执行命令:
1.make
2.insmod kernle.ko
然后内核报错:
insmod: error inserting 'kernel.ko': -1 Inavalid parameters
出错原因:
解决办法:
将kernel.c的文件名换成hello.c,同时将Makefile中对应的名称也换成hello,然后重新make,insmod问题解决~~
关于这个问题我还想补充几点:
1.Makefile文件中注意命令执行的部分,前面一定用tab键开头,否则编译的时候会出错。
2.这个编译程序是适用于linux平台下的,ubuntu平台下可能会报异常,大家一定注意!!!
3.关于这个问题,我还看到过csdn上另一个博客,如果我的方法无法解决,大家可以参考这篇博客:
http://blog.csdn.net/miaohongyu1/article/details/20938515
最后,good luck~~