Memory region IDT_LIST

[backstreet.devisor]

Hi.

What is IDT_LIST (Memory region)?

What is it used for and can it be used in nRF52820 microcontroller?

Thank you.

[SwRa]

Hello,

It's the interrupt descriptor table / vector table. Based on description here, https://github.com/nrfconnect/sdk-zephyr/blob/main/include/zephyr/linker/intlist.ld#L22, it's just a bogus memory region, that is stripped from the final ELF image.

Regards,

Swathy

[John Galvin]

If this is bogus, is it not counted towards the overall memory size?

I ask this because I'm using the nRF52832-QFAA which is has 512K flash. The FLASH region fof my build with a single project (no mcuboot) is 480K whcih is 32K less than the 512K capacity of the device.

Is the IDT_LIST this 32K or is has the 32K gone somewhere else? How to I get in back?

[243/243] Linking C executable zephyr\zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:      221240 B       480 KB     45.01%
             RAM:       30660 B        64 KB     46.78%
        IDT_LIST:          0 GB        32 KB      0.00%