🚀 go-pugleaf

Sorry to post to this newsgroup.  Couldn't think of anything else.

I have a program written in common lisp, which links a set of
libraries written in C and compiled with gcc.  The lisp program
crashes in the C section of code, and dumps core.  The backtrace of
the core cannot locate the symbols for the function where the crash
takes place.  However, I know which function it is, but cannot tell
gdb to use that function.  I can load the symbols from the .o file
containing the function, but there I am stuck.  Is there any way to
tell gdb that the ?? in the backtrace in fact belongs to a particular
function whose symbols can be provided?  If not, is there a reason why
this is so?

Thanks for any and all responses.