Hi Joakim, On Wednesday 13 April 2011 17:38:03 Joakim Tjernlund wrote: > > > How big was the size to copy_tofrom_user()? Did it mange to copy > > > any bytes? > > > > The size in __copy_tofrom_user is 4. And its the first call in > > ftrace_modify_code() that fails directly. This works just fine on a > > PPC440EPx board. > > Since the size is only 4 it would not use dcbX anyway(I think). > Then is is probably called with the wrong addresses?
No, addresses seem to be correct. I checked a bit further (I'm quite new to the MPC8xx MMU) and it seems that trying to modify the code (that's the destination address) via __copy_tofrom_user() fails on MPC8xx. Still not sure why this is the case. Perhaps an 8xx guru might chime in here. ;) BTW: I just noticed that enabling CONFIG_PIN_TLB seems to resolve this issue. With this option enabled, the dynamic code modification works just fine. Joakim, Scott? Any ideas on this? Thanks, Stefan _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
