On Thu, Sep 13, 2018 at 11:48 AM Razvan Cojocaru <rcojoc...@bitdefender.com> wrote: > > On 9/13/18 8:29 PM, Spencer Michaels wrote: > > I'm writing an application that can read/write guest memory, and as part > > of that I need to check whether the page being manipulated is > > readable/writable by the guest itself. Does Xen have an API that would > > allow me to read the flags of an arbitrary page on a guest, given either > > its address or its PFN? I've only been able to find functions that > > update the existing memory mappings, but none to read them. > > If you mean EPT, yes: look at xc_get_mem_access() in xenctrl.h / libxc. > If you mean "regular" PTEs, no - you'd have to write your own code to > retrieve that.
LibVMI does that for guest PTEs: https://github.com/libvmi/libvmi/blob/master/libvmi/libvmi.h#L936 Tamas _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
