REDUCE

14.2 Ring Buffers

The code-address-to-symbol function takes an integer argument, and attempts to find out what function that address is in. If the address does not map to any function, the name of the most recently loaded function is returned.

(code-address-to-symbol ADDRESS:integer): id expr
for example:
(code-address-to-symbol 16#38393)

This function is available by evaluating (load addr2id).