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第一次学写驱动,试着按照 linuxdevicedriver3 里说的写的一个驱动
#include<linux/module.h>
#include<linux/kernel.h>
#include<linux/version.h>
#include<linux/types.h>
#include<linux/fs.h>
#include<linux/mm.h>
#include<linux/error.h>
#include<linux/config.h>
#include<asm/segment.h>
unsigned int test_major = 0;
static int read_test(struct inode *inode,struct file *file,char *buf,int count){
int left;
if (verify_area(VERIFY_WRITE,buf,count) == -EFAULT)
return -EFAULT;
for (left = count; left > 0 ; left--){
__put_user(1,buf,1);
buf++;
}
return count;
}
static int write_test(struct inode *inode,struct file *file,const char *buf, int count){
return count;
}
static void release_test(struct inode *inode,struct file *file,){
MOD_DEC_USE_COUNT;
}
struct file_operations test_fops = {
NULL,
read_test,
write_test,
NULL,
NULL,
NULL,
NULL,
open_test,
release_test,
NULL,
};
int init_module(void){
int result;
result = regster_chrdev(0,"test",&test_fops);
if(result < 0){
printk(KERN_INFO "test:can't get major number!\n");
return result;
}
if(test_major == 0)test_major = result;
return 0;
}
void cleanup_module(void){
unregister_chrdev(test_major,"test");
}
一般设备驱动写这样一个.c文件就可以了吗?(本人实在不太懂,都没有说这样些一个完整驱动的例子),????
然后就执行:
gcc -O2 -DMODULE -D__KENEL__ -c test.c
出错:
linux/module.h:No such file or director
linux/mm.h:No such file or directory
linux/error.h:No such file or directory
linux/config.h:No such file or directory
asm/segment.h:No such file or directory
为什么会这样?是gcc找不到lib文件?我有装 linux-headers- |
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