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

[Richard Henderson <richard.henderson@linaro.org>]

On 3/15/22 13:43, Peter Maydell wrote:
> 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>
> ---
>   target/arm/cpu.c      | 5 +++++
>   target/arm/m_helper.c | 5 +++++
>   2 files changed, 10 insertions(+)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~