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 two short videos (registration required) highlighting:

System Workbench for STM32

STM32F042F6P6, generating much too large .bin file silently?

Without seeing your code, the only thing I can think of offhand is that you might have USE_FULL_ASSERT (#define) enabled. I don’t see any reference to printf() in the map file, so I could very well be wrong.

If USE_FULL_ASSERT is on and you’re using the Cube HAL, a LOT of extra code will get generated.