i followed the link and tried to add a system call in kernel-version 2.6.37
here is the code :
#include<linux/linkage.h>
#include<linux/kernel.h>
#include<linux/fs.h> //for getname
#include<linux/err.h> //for PTR_ERR
asmlinkage int sys_hariohm(const char __user *filename)
{
char *tmp = getname(filename);
int fd=PTR_ERR(tmp);
if (!IS_ERR(tmp))
{
printk("filename %s \n",tmp);
putname(tmp);
return fd;
}
else
{
return 2;
}
}
the compilation process was silent (without any error).
but when i try to boot into the kernel having this system call , i get the errors like :
do_exit() ,do_group_exit() , syscall_init() error lines with some addresses.
can someone help me understand what is wrong with this code?
thanks in advance :)
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........................
MOHIT VERMA
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