When is .ARM.exidx is used

Question

I am working on Contiki 2.7 with the mbxxx target. While building my code the linker complained about an overlap of .ARM.exidx and .data sections. After som

Answer 1

.ARM.exidx is the section containing information for unwinding the stack. If your C program has functions that print out a stack backtrace, the functions will likely depend on this section being present.

Maybe look for a -funwind-tables or -fexceptions flag in your compiler options.