How to read the shared memory in Openfwwf firmware (Assemply code)?

I have modified Openfwwf and it works on Openwrt. my question is

How to read the data that they are saved in the shared memory? If it is possible to add any code in a firmware to be able to read the data from a command line or using c code?

I am stacked at this point. Please any help will be great. thank you in advance