Ghidra: External references for raw binary

[saruman9]

Describe the bug
Functions from external programs in raw binary file dispayed in decompiler as func_0x00009190 or func_0x1

To Reproduce
Steps to reproduce the behavior:

1. Load raw binary file (module of firmware), which contains calls of external functions.
2. Load additional raw binary file (shared library for modules of firmware) and set it as external program.
3. Open module of firmware in CodeBrowser and find undefined call of function
   

1. Add external reference for CALL
   

   

   Name of function in decompiler:
   

   or

   1. Create new block of memory (addresses of shared library).

   2. Create reference in called function.
      

      Name of function in decompiler:
      

Expected behavior
Name of function in decompiler should be displayed as in external function.

Environment (please complete the following information):

• OS: Linux
• Java Version: 11.0
• Ghidra Version: 9.0

Additional context
How can I create external reference in idiomatic way for raw binaries? Adding external reference for all CALL (JMP and others) is a very time consuming process. Can I automate it without script?

How can I export functions (signatures too) from Exports of shared library to Import of module of firmware and synchronize them in future? I do it manually now: reverse engineering functions in shared library, then changing signatures in functions of Imports in module of firmware.

[saruman9]

I developed a script for temporary use. It find all references to functions from all external programs (shared libraries) and set external references, set name and prototype (signature) of functions.

script

[goosenphil]

Could you make the script into a PR?

[saruman9]

Could you make the script into a PR?

I developed the script in the context of the project at work (NDA). When I finish the project, I will make a PR. While you can use prototype.

[saruman9]

As I promised, I'm publishing the script for finding external references in raw binaries. It's far from ideal, but you can use it as example for developing more complex scripts/plugins.

[goosenphil]

As I promised, I'm publishing the script for finding external references in raw binaries. It's far from ideal, but you can use it as example for developing more complex scripts/plugins.

Thank you very much for this contribution :)