Preserving error information between reboots with RTC_NOINIT_ATTR

[JosuGZ]

Hi, I want to preserve some memory between reboots so I can check the cause (for example, by setting a variable before calling abort); or just keep some counters (like an error counter).

I've seen that I can achieve that with "RTC_NOINIT_ATTR", but I'm not sure the bootloader will not override the values, is there a proper way to do this?

Also, it would be interesting to have some kind of stack trace or core dump preserved, I'm not sure if that can be done.

[JosuGZ]

It seems like I should check the linker script for this, although I still don't know how to do it...

[ESP_Sprite]

The bootloader shouldn't touch the RTC memory.