Reference Parameters

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Passing Parameters by Reference
-------------------------------

   If the parameter is passed by reference (e.g., Pascal `VAR'
parameters), then the symbol descriptor is `v' if it is in the argument
list, or `a' if it in a register.  Other than the fact that these
contain the address of the parameter rather than the parameter itself,
they are identical to `p' and `R', respectively.  I believe `a' is an
AIX invention; `v' is supported by all stabs-using systems as far as I
know.