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Re: [Xen-devel] accessing domain's page contents from hypervisor
- To: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
- From: Sai Suresh <saisuresh@xxxxxxxxx>
- Date: Thu, 12 May 2005 10:45:18 -0500
- Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 12 May 2005 15:44:51 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
Actually, I was passing the machine address in that variable :) I was
using the code to debug, and didnt bother to change the variable name.
Its type is unsigned long. It seems to contain a valid machine address,
as it fell in the range between alloc_start and alloc_end that is
allocated to a domain.
On 5/12/05, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx> wrote:
> 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.
map_domain_mem takes a machine address
Ian
> /*----------------------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------------------------------*/
>
>
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