On Sep 5, 2015 14:35, Bastian Koppelmann <kbast...@mail.uni-paderborn.de> wrote: > IIRC a lot of the registers are supervisor only, e.g. VR, NPC or SR and > the manual is fairly clear about that. User mode cpu ought not to read > these registers unconditionally.
When I last discussed this on the openrisc list, back in March, there was no real specification for user mode, and what bits are or should be accessible. Looking at http://opencores.org/or1k/Architecture_Specification today, that still seems to be the case. In the meantime, dropping the privilege check makes linux-user GCC tests work better. r~
