C - Address of variables in the activation records

What's the quickest, easiest way to开发者_开发技巧 find the memory address of the first local variable in the activation record? (In C..)

Doesn't matter what we have declared already. Could be simple as char *s = 'Hello world!'

Thanks!

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You can't do that - the C standard doesn't even require that there is a stack, let alone requiring a standard way to find out the order in which variables were put on it.

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There is no portable way to do this in C. Any attempt to do this would be platform- and calling convention-specific.