Almost all the modules of the library are in the segments LIB_CODE and LDIV, but i don't know if we can separate some modules from these segments. Can we do it? And if yes, how can i do it?
For what you call "remote download", you will need a separate, stand-alone version of the code that handles the download. This version must not make any use of the library functions of the piece of code it will remove and replace by something else. You'll usually have to link that "firmware" separately from the main program, and keep it in an isolated memory region.
I agree but I did not find the functions which can replace the library and i need these functions in the firmware. We read a code that was store in an external flash, via a bus I2c. So we need a long address. So I need such functions as multiplication,division...But now i found these functions. Thank you for your answers. Kaoru
You're not quite getting me yet. The trick you're missing is that you will have to have *two* copies of that library segment: one in the firmware part of the program, the other in the program it downloads into the flash. Essentially, you'll have to build the firmware and the linker as self-contained separate projects, including separate linker runs for each of them.