And if you declare a section in an ld script, and declare variables in this section. Is there an example of a section declaration and how to declare variables?

Thanks for reply!

I have a lot of variables. Lots of code from code generator. This may increase read-only data and searches are needed!
Would like to be able to access the data section in flash.

How to read initialization data values for variables? I want to know if the value of a variable has changed, compared to the initialization value. Global var: int abc = 124; In stm32: address VAR in data (flash) = "start section of data in flash" + ("address VAR in ram" - "start data section in ram"...