public int getExtendedSectionIndex(ElfSymbol sym) {
		if (sym.getSectionHeaderIndex() == ElfSectionHeaderConstants.SHN_XINDEX &&
			symbolSectionIndexTable != null) {
			int symbolTableIndex = sym.getSymbolTableIndex();
			if (symbolTableIndex < symbolSectionIndexTable.length) {
				return symbolSectionIndexTable[symbolTableIndex];
			}
		}
		return 0;
	}
Get the extended symbol section index value for the specified ELF symbol which originated
from this symbol table.   This section index is provided by an associated SHT_SYMTAB_SHNDX 
section when the symbols st_shndx == SHN_XINDEX.
@param sym ELF symbol from this symbol table
@return associated extended section index value or 0 if not defined.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/elf/ElfSymbolTable.java