Access symbols in another image
Use a symbol definitions (symdefs) file if you want one image to know the global symbol values of another image.
You can use a symdefs file, for example, if you have one image that always resides in ROM and multiple images that are loaded into RAM. The images loaded into RAM can access global functions and data from the image located in ROM.
You specify a symdefs file with the
--symdefs command-line option.