In IDA, in the Functions subview, many functions have one or more underscores in their name. I'm guessing the number of underscores implies something. Does anyone know what the number of underscores indicate?


  • The function names here are not given by IDA (unless Lumia) - it is probably from the symbols in the binary. The _ doesn't mean anything in IDA context.
    – sudhackar
    Apr 8 at 9:17
  • Function names in the binary, FLIRT signatures or a PDB, I reckon.
    – 0xC0000022L
    Apr 8 at 10:03

1 Answer 1


I found the answer on this thread.

These are not from IDA, but from the libraries used by the binary.

  • 1
    You can mark this as accepted
    – sudhackar
    Apr 8 at 14:33

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