v7-M: Fixing XIP when the kernel is in ROM

[Ezequiel Garcia]

On 27 October 2015 at 18:52, Maxime Coquelin <mcoquelin.stm32 at gmail.com> wrote:
> 2015-10-27 22:46 GMT+01:00 Ezequiel Garcia <ezequiel at vanguardiasur.com.ar>:
>> On 27 October 2015 at 18:33, Maxime Coquelin <mcoquelin.stm32 at gmail.com> wrote:
>>> 2015-10-27 21:33 GMT+01:00 Stefan Agner <stefan at agner.ch>:
> ...
>>>> Anyway, I guess Ezequiel's fix is the right thing to do...
>>> Or, maybe we should put the stack in RAM as Uwe suggest?
>>>
>>
>> It seems the current fix would be used as-is (no need to
>> set a temporary stack before the SVC call).
>>
>> And on top of that, we need a to set a proper stack as soon
>> as the kernel takes control.
>>
>> Am I right?
> IMHO, yes, that's how I understand it.
>

After some deeper code parsing, it seems the stack
is set in __mmap_switched.

Although it seems that happens after __v7m_setup,
ARM noMMU has worked like this since ages now, is v7-M
really different to need a special treatment?

-- 
Ezequiel García, VanguardiaSur
www.vanguardiasur.com.ar