Re: [PATCH 1/2] target/arm: Log M-profile vector table accesses

["Alex Bennée" <alex.bennee@linaro.org>]

Peter Maydell <peter.maydell@linaro.org> writes:

> Currently the CPU_LOG_INT logging misses some useful information
> about loads from the vector table.  Add logging where we load vector
> table entries.  This is particularly helpful for cases where the user
> has accidentally not put a vector table in their image at all, which
> can result in confusing guest crashes at startup.
>
> Here's an example of the new logging for a case where
> the vector table contains garbage:
>
> Loaded reset SP 0x0 PC 0x0 from vector table
> Loaded reset SP 0xd008f8df PC 0xf000bf00 from vector table
> Taking exception 3 [Prefetch Abort] on CPU 0
> ...with CFSR.IACCVIOL
> ...BusFault with BFSR.STKERR
> ...taking pending nonsecure exception 3
> ...loading from element 3 of non-secure vector table at 0xc
> ...loaded new PC 0x20000558
> ----------------
> IN:
> 0x20000558:  08000079  stmdaeq  r0, {r0, r3, r4, r5, r6}
>
> (The double reset logging is the result of our long-standing
> "CPUs all get reset twice" weirdness; it looks a bit ugly
> but it'll go away if we ever fix that :-))
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

-- 
Alex Bennée