3.3.3.4 How Do I Stop the Compiler From Using Certain Memory Locations?
Concatenating an address attribute with the noload attribute can be used
to block out sections of memory. Also, you can use the option -mreserve.
For more on variable attributes and options, see the following sections in this user’s
guide:
5.7.1 Options Specific to PIC32M Devices
See the MPLAB® XC32 Assembler, Linker and Utilities User’s Guide (DS50002186) for details on linker scripts.