On 22/04/2022 14:26, Mike Jagdis via Sdcc-user wrote:
I suspect that what it means is that only S and AF parts covered by
RM0016 implement roll-over limits and you should not assume other
variants are the same. I guess there's some regulation in the automotive
world that says stack space must be clearly defined and {over,under}flow
must never be allowed to trash non-stack data. I can't see any other
reason for going to the expense unless not doing it would lose a hefty
chunk of market.
I just had a quick look at the reference manuals for the STM8L series
(RM0013 & RM0031), and those unhelpfully don't have equivalent content
in their 'Memory and register map' sections. No talk of stack pointer
handling; it just says "see product datasheets".
A couple of STM8L datasheets I then looked at (STM8L050 & STM8L151) *do*
show a limited stack of 512 bytes on their memory map, so one could
assume that they behave the same as the STM8S/AF. But, without parts in
hand to actually test, who really knows... <shrug>
Regards,
Basil Hussain
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