Need more detailed information about Tensilica TIE language

Few days ago I started to debug programm for Xtensa processors. Today i find out, that there is possible for user to create additional commands fot processor with TIE Language. There is not very much documentation in the network and the software for creating commands with TIE, Xtensa Xplorer, available only in demo version.

The questions are:

  • Is it possible to find user-created commands in the ELF file?

  • If yes, where they can be?

  • If no, how are they translated to the processor?

  • How this commands can be translated to electrical signals correctly?

Thanks in advance.