On Fri, Jun 19, 2009 at 12:25, Bernd Schmidt wrote: > Mike Frysinger wrote: >> - before the handler can push RETI onto the stack (and thus clear >> IPEND[4]), an exception is triggered > > This shouldn't happen, at least not with any exception other than a CPLB > miss.
right, the likelihood of this happening in *our* code is very very small, but it is still non-zero. with xenomai ipipe code (and perhaps other people's code), it may be much higher. i think our core code should be able to recover from this though regardless of what other people are doing. perhaps we need to add another field to our core PDA to save IPEND so that when we do return from exception_to_level5, we can test to see if we need to restore IPEND[4] to the state before the exception occurred. -mike _______________________________________________ Uclinux-dist-devel mailing list Uclinux-dist-devel@blackfin.uclinux.org https://blackfin.uclinux.org/mailman/listinfo/uclinux-dist-devel
