Have you tried using the ST fork of OpenOCD? https://github.com/sysprogs/openocd-st/
Is this of any use? https://visualgdb.com/tutorials/arm/stm32/multicore/startup/
Have you tried using the ST fork of OpenOCD? https://github.com/sysprogs/openocd-st/
Is this of any use? https://visualgdb.com/tutorials/arm/stm32/multicore/startup/