On Tuesday 15 August 2006 03:43, Kostik Belousov wrote: > On Mon, Aug 14, 2006 at 11:12:23PM +0600, Stanislav Sedov wrote: > > On Mon, 14 Aug 2006 11:15:22 -0700 > > John-Mark Gurney <[EMAIL PROTECTED]> mentioned: > > > > > > You should make a MD API for reading these out (if one doesn't already > > > exist) that handle the faulting for you, and then have your driver hook > > > into this api... > > > > > > I had to do something similar for accessing PCI config registers > > > that don't exist and cause a fault... > > > > > > > Do you know some examples to look at? The problem is that i can't make > > modifications in trap.c or anywhere else in src tree as such driver > > isn't likely to become a part of FreeBSD kernel. > > Hmm, I think that jhb@ somewhat misguided your. For kernel-mode faults > on i386, GPF and Segment not Present faults both results in calling > of pcb_onfault handler. This is true for both STABLE and CURRENT. > > And this is true for amd64 as well. > > Look at the code at the <arch>/<arch>/trap.c, for arch in i386, amd64.
Hmm, well that's handy then. Learn something new everyday. :) You can see how to use pcb_onfault in some of the routines in i386/i386/support.s. -- John Baldwin _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
