>>> On 30.09.15 at 16:23, <roger....@citrix.com> wrote: > El 30/09/15 a les 14.35, Jan Beulich ha escrit: >> On 30.09.15 at 14:19, <roger....@citrix.com> wrote: >>> For VCPU_HVM_MODE_32B: >>> - rIP within CS limit. >>> - Check that CS.DPL == SS.DPL. >>> - rSP within SS limit. >>> >>> TBH I don't think we should enforce the last two checks, starting with >>> an invalid stack should be fine as long as the user knows it. Maybe >>> print a warning/debug message in this case? >> >> I wouldn't check ESP at all. As to the two DPLs to, I don't think you >> could launch a guest with these disagreeing. > > I think we should basically check that the DPL of the CS segment is > equal or greater than the DPL of all the other segments (ds, ss and es).
Except that for SS it needs to be equal. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
