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). Roger. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
