You can inspect or modify library functions by examining the source code in the lib/src subdirectory of the compiler installation. For example, C:\ti\ccsv7\tools\compiler\c2000_#.#.#\lib\src.
One you have located the relevant source code, change the specific function file and rebuild the library.
You can use this source tree to rebuild the rts2800_ml.lib library or to build a new library. See Section 8.1.7 for details on library naming and Section 8.4 for details on building