IRQ_STACK
In this section:
Description
Holds the stack which is used when servicing IRQ exceptions. Other stacks may be added as needed for servicing other exception types—FIQ, SVC, ABT, and UND. The cstartup.s file must be modified to initialize the exception stack pointers used.
Note
This section is not used when compiling for Cortex-M.
Memory placement
This section can be placed anywhere in memory.