RIOT
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cpu: Add start and end markers for flash_writable section
Contribution description
This PR adds start and end markers for the flash_writable
section. For the ESP32x SoCs these were already added in #19079.
What are they used for? I can't find any reference outside ESP32 code
What are they used for? I can't find any reference outside ESP32 code
Not directly inside RIOT but I needed these markers to assess the size and location of the region to model it in an emulator. So I thought it would make sense to add them in cases other people want this information.