Get size of a memory segment

gpontis · Oct 15th 2017, 7:58pm

I am trying to find the size of a memory segment. In this specific case it should be easy since I only have one section in the memory segment. According to the docs for the section placement file format, one can add a size_symbol. If my understanding is correct, then I could access the value through this symbol in the application code. I tried this:
<MemorySegment name="$(ITCM_NAME:ITCM)">
<ProgramSection alignment="4" load="No" size_symbol="__itcm_size__" name=".code_TCM_run" />
</MemorySegment>
But it does not lead to creating such a symbol. Am I understanding the use of size_symbol correctly ? If yes, then how can I use it to do what I need ?
George

SEGGER - Nino · Oct 17th 2017, 10:48am

Hello George,

But it does not lead to creating such a symbol. Am I understanding the use of size_symbol correctly ? If yes, then how can I use it to do what I need ?

You are understanding the documentation correctly. Unfortunately there seems to be an issue currently with that functionality.
We are investigating if this is wrong behaviour or a mistake in documentation.

Nonetheless you have a working alternative you can use. Per default each section creates a size symbol the following way: __<sectionname>_size__
It does not matter if you have called size_symbol or not, the mentioned symbol is always created and can be used.
Keep in mind that this symbol is treated like a address pointer and needs to be called accordingly.

Sorry for any inconveniences caused.

Best regards,
Nino

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