[Xen-devel] accessing domain's page contents from hypervisor

[Sai Suresh <saisuresh@xxxxxxxxx>]

Hi,

I was trying to read the contents of a domain's L1 page table page from hypervisor.
The system reboots whenever I dereference the contents of a page.
I use the map_domain_mem and unmap_domain_mem functions before and after I dereference it.
Any suggestions on the possible reasons would be really helpful.

Thanks,
Sai


/*----------------------code---start------------------------------*/
    unsigned long * pg;
    int i;
    list_for_each_entry(page, &d->page_list, list)
    {
        if ( (page->u.inuse.type_info & PGT_type_mask) == PGT_l1_page_table){
        
            pg = (unsigned long *) map_domain_mem(domain_id);
             for(i=0; i<1024; i++) {
               
if( ( pg != NULL) &&  (pg[i] & 0x00000041) )
                count++;
              }
         }
         unmap_domain_mem(pg);
     }
/*----------------------code---end------------------------------*/
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel