problem with storage data when DFU updated

[Mikhail]

I use DFU. All ok. But I need to store my settings after update. As I was advised, I located my data from address 0x72400

 

 volatile PASSKEY_CONTEXT pass __attribute__((section(".ARM.__at_0x72500"))) =
{
	.passkey_length 			= 6, 	.passkey 				= "123456", 
};

But Keil added after this struc some code

:102500000631323334353600000000000000000090
:10251000011022011A4002B11BFFFF1401619461F6
:102520008A028B893D0C012E0C10181818122901F3
:10253000014E1220027540C490D00314E1360223EC
:0425400003FF000095
:040000050001F20103
:00000001FF

When I make to many changes (compile on an another optimisation level), this part of code changes to. Therefore if try to update by DFU, most of code will updated but this part of code will not be updated. And project will fall.

How to correct locate my struct with my non updatable data?

How to except generation of this additional code?

[Mikhail]

I decided this problem. Should locate structure like before (0x72400) and correct .srt file to flash size from 0x1f000 and size 0x51000

And at this case all will work correct.