Detect recursive fixed calls.

Former-commit-id: 94666d2282500664bbac52cdbfbd616c2ab4eb5b

src/interfaces/irdb/STARS_IRDB_Function.cpp

@@ -255,8 +255,10 @@ void STARS_IRDB_Function_t::FindFixedCalls(SMPFunction *CurrFunc) {
 				if (success && (!TargetIDSet.empty())) {
 					assert(1 == TargetIDSet.size());
 					STARS_ea_t JumpTargetID = TargetIDSet.begin()->GetIDWithinFile();
-					if ((STARS_BADADDR != JumpTargetID) && (!this->IsInstIDInFunc(JumpTargetID))) {
-						// Valid jump target outside of current function.
+					bool ValidJumpTarget = (STARS_BADADDR != JumpTargetID);
+					bool RecursiveFixedCall = (JumpTargetID == CurrFunc->GetFirstFuncAddr());
+					if (ValidJumpTarget && ((!this->IsInstIDInFunc(JumpTargetID)) || RecursiveFixedCall)) {
+						// Valid jump target outside of current function, or recursive call to start of function.
 						CurrInst->SetFixedCallJump();
 						cout << "Found fixed call jump to ID " << JumpTargetID << " from ID " << CurrInst->GetAddr() << endl;
 						FixedCallPushSeen = false; // reset for detection of next occurrence