alt_load() - Anyone having info?

It's only copied to RAM if that's what you've asked for on the system library properties page. If you've assigned the .rodata section to be in flash, it will be left in flash.

The same is true of the .exceptions section, except in this case where it is placed is determined by where you point the hardware exceptions vector in SOPC builder.

There is an engineering trade off here. It will save RAM if you leave these sections in flash, but it will also potentially slow your code down. What the right choice is for you depends on your requirements.