Tornado Reference : Tornado Utilities
elfXsyms - extract the symbol table from an ELF file
elfXsyms < objMod > symTbl
This tool reads an object module (UNIX SVR4 ELF format) from standard input and writes an object module to standard output. The output object module contains only the symbol table, with no code, but is otherwise a normal, executable object module.
This tool is used to generate the VxWorks symbol table, vxWorks.sym.
elfXsyms, makeSymTbl, UNIX SVR4 ELF documentation