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.
pgp0S7hcaY8fS.pgp
Description: PGP signature
