[avr-gcc-list] Any constant to locate first and last byte of ram?

[Bernard Fouché]

I'd like to offer a ram dump option to a product. Is there a way to do it
using already existing constants to have portable code in all the avr
product range? For instance to be able to write:

for(i=RAM_START;i<=RAM_END;i++)
        printf_P(PSTR("%04x: %02x\n\r"),read_ram_byte(i));

RAM_START would skip registers and RAM_END would point to the very last byte
of ram of the chip. Maybe some functions are to be used instead of
constants?

Thanks