Access to symbol table from within a program

[linguist-gcc@rich-paul.net]

I'm curious:  I have found the -finstrument-functions compiler
switch, and have used to it print out the addresses of functions
as they are called.  How could I use the symbol table from within
the program so that I could show the names of the functions as
they are called, something like:

+main
 +myfunc1
  +myfunc2
  -myfunc2
  +myfunc3
   +myfunc2
   -myfunc2
  -myfunc3
 -myfunc1
-main

This would be really handy.

Is there any reference that would discuss this part of the ABI?

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