@Override
	public String toString() {
		switch (subopcode) {
			case kPEFRelocSmByImport:  return "RelocSmByImport";
			case kPEFRelocSmSetSectC:  return "RelocSmSetSectC";
			case kPEFRelocSmSetSectD:  return "RelocSmSetSectD";
			case kPEFRelocSmBySection: return "RelocSmBySection";
		}
		return super.toString();
	}
This "RelocSmBySection" (SECN) instruction adds the address of the instantiated 
section specified by <code>index</code> to the word 
pointed to by <code>relocAddress</code>. After
execution, <code>relocAddress</code> points to just 
past the modified word.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pef/RelocByIndexGroup.java