[avr-gcc-list] a symbol for end of program memory used?

[Paul Stoffregen]

I'm working on a program which attempts to use all of the un-allocated 
flash memory for data storage.  Writes are done by calling hooks in a 
bootloader.

So far, I'm using "__data_load_end" to know where the unused flash 
memory begins.  Is that the best way?  Does the linker provide any 
special symbols or other way I can get the end of allocated flash memory 
as a constant which I can use in my program?


Thanks,

-Paul