@Override
	public InjectPayload getCallFixup(Address callDestAddr) {
		Program program = instr.getProgram();
		Function func = program.getFunctionManager().getFunctionAt(callDestAddr);
		if (func == null) {
			return null;
		}
		String fixupName = func.getCallFixup();
		if (fixupName == null) {
			return null;
		}
		InjectPayload fixup = program.getCompilerSpec()
				.getPcodeInjectLibrary()
				.getPayload(InjectPayload.CALLFIXUP_TYPE, fixupName);
		if (fixup == null) {
			Msg.warn(this, "Undefined call-fixup at " + callDestAddr + ": " + fixupName);
		}
		return fixup;
	}
Initialize the cache or any references on an instruction that would cause an override.

@return list of any program overrides
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/listing/InstructionPcodeOverride.java