On Thu, 2011-12-01 at 18:44 +0800, tiejun.chen wrote: > Do you mean we should push the original pt_regs (or that whole exception > stack) > downwards the location the new r1 point? Then its safe to perform this real > emulated stw instruction. At last we will reroute r1 to that copied exception > frame to restore as normal. Right?
Right. That way we don't have to modify the (sensitive) restore path, we only hook around the do_work branch which is a lot easier and less risky. > Here I suppose so, I implement this for PPC32 based on the above > understanding. > I take a validation for kprobing do_fork()/show_interrupts(), now looks fine. > Tomorrow I will go PPC64, and hope its fine as well. > > If everything is good I'll send these patches to linuxppc-dev next week. Excellent, thanks ! Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
