SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world. And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download (registration required) various documents highlighting:

System Workbench for STM32

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Simple debugger problem...



There is a small problem in the memory view, where the debugger tries to read past the end of the existing memory (which is the case as your stack is at the end of the chip internal SRAM), thus getting an access error and not updating the memory view. We are currently working on a solution, that will be available in a coming update.

In the meantime you could, instead of using the memory view, you could create a watch to check that the variable is correctly updated, possibly accessing the variable by *(int*)0x20003ff3

Hops this helps,