Need some help with xtensa processor

Ben Greear
Wed Aug 17 00:22:00 GMT 2016

On 08/16/2016 05:11 PM, Sterling Augustine wrote:
> On Tue, Aug 16, 2016 at 5:01 PM, Ben Greear <> wrote:
>> Hello!
>> I'm working on a closed source (not my decision) project that uses
>> an xtensa cpu.  I have no jtag access to this board, but I can pass
>> messages, including grabbing 'logs' and stack traces on crash, and so forth.
> Can the Cadence people not help you?
> If you have a copy of the ISA book or the programmer's book, then I
> believe they have explanations on how to set the registers as well.
> Failing all that, then your best bet it to look at the gdb sources and
> see how it is done.

Cadence probably could, but I don't think I rate high enough for them to care.

I have the ISA book, and you can find it online, and I think I am close,
but I must be missing something.  I suspect it is the exception vector...trying
to figure out how to set that now.


Ben Greear <>
Candela Technologies Inc

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