You've got some kind of XY-problem.
The truth is: it's IDA who so to say "changes" the name of (something she thinks is) a function from absolutely nothing to sub_{address}. Why on earth would PE-file have non-exported symbols stored in it? Some kind of masochism? To give a candy to reversers?
Thus, you have at least three ways of dealing with your problem:
- pray and hope that IDA's FLIRT will heuristically recognize
printf; linkyour program with debug-info:-debugwhich tells linker to generatepdb-file which IDA will query for all the symbols stored for your application;- tell linker to
-export:printfso that it's name will be in export directory and you can get it's address easily even programmatically.
