On 16 May 2011 17:10, Paul Brook <p...@codesourcery.com> wrote: >> > I just spoke with Paul on IRC about this. In summary: >> > * for a helper to cause an exception then it has (a) to make sure CPU >> > >> > state (pc, condflags) is sync'd before the call to the helper and (b) >> > the helper has to be in a file with access to global env, because it >> > needs to call cpu_loop_exit() >> >> I don't think (a) is true. It is possible to use the same way as for >> load/store operations, that is call cpu_restore_state() before calling >> cpu_loop_exit(). > > To call cpu_restore_state you need to know searched_pc. To find that you need > to unwind the host stack all the way back to translated code.
You can do this by calling GETPC() from the top level helper function though, right? [OK, we'd need to move the definition out of dyngen-exec.h.] -- PMM
