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In my linker script file, I have defined two symbols define symbol _region_RAM_start__ = 0xC0000000; define symbol _region_RAM_end__ = 0xC00fffff; and then I have exported them as well as shown below export symbol _region_RAM_start__; export symbol _region_RAM_end__; From the application code, I try to access these symbols extern const unsigned int _region_RAM_start__; extern const unsigned int _region_RAM_end__; .... int GetRAMSize() { int size = 0; unsigned int address_1 = _region_RAM_start__; unsigned int address_2 = _region_RAM_end__; size = address_2 - address_1 + 1U; return size; } Now, I expected the return value to be 0x00100000, however, all I get is 0. So, when I turned to the debugger, I noticed that _region_RAM_start__ and _region_RAM_end__ have the values 0xC0000000 and 0xC00fffff respectively, but address_1 and address_2 have the value 0. The compiler optimization is set to "None". This has been bugging me for a while now. Is there something very obvious I am missing here (other than "I should not be doing this in the first place") ? Solution Thanks to n.m. for the answer unsigned int address_1 = (unsigned int) (&_region_RAM_start__); Otherwise address_1 and address_2 both contain garbage values (i.e. values available at the address 0xC0000000 and 0xC00fffff respectivly, but garbage from the point of view of this code)

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