Re: [PATCH v2 5/8] target/arm: Take an exception if PC is misaligned

[Peter Maydell]

On Mon, 20 Sept 2021 at 02:29, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 8/26/21 6:45 AM, Peter Maydell wrote:
> > I don't think you should need to special case AArch64 vs AArch32 like this;
> > you can do
> >     env->exception.vaddress = pc;
> >     env->exception.fsr = the_fsr;
> >     raise_exception(env, EXCP_PREFETCH_ABORT, syn_pcalignment(), target_el);
> >
> > for both. AArch64/AArch32-Hyp exception entry will ignore exception.fsr,
> > and AArch32-not-Hyp entry will ignore exception.syndrome.
>
> Not true.  The latter case still requires syndrome with EC_INSNABORT, etc.

For AArch32-not-Hyp ? Syndrome doesn't matter at all in that case
(only Hyp mode and AArch64 have syndrome registers); it just needs
to take the prefetch abort exception, which you get by using
EXCP_PREFETCH_ABORT.

-- PMM