On Thu, 19 Aug 2021 at 20:18, Peter Maydell <peter.mayd...@linaro.org> wrote: > Just noticed that section G1.16.7 says that when we report > PC alignment faults to AArch32 they should be prefetch aborts, > not UDEF. The fault address and fault status registers also need > to be set (with slightly varying behaviour for when the fault > is taken to Hyp mode). > > For AArch64 we should also be setting the FAR, which means > that for consistency it's better to use EXCP_PREFETCH_ABORT > and set exception.vaddress in the translate-a64.c code > (you get better logging in the exception-entry code) > even though these different EXCP_* all boil down to the > same synchronous-exception vector.
Also, looking at kernel code while reviewing your alignment-checking patchset, I realized that we should also catch this case of a prefetch abort in linux-user/ and turn it into a SIGBUS/BUS_ADRALN with the address being whatever the value in the FAR is (for both arm and aarch64). -- PMM
