Candidate release of source code.

Ghidra/Features/Base/ghidra_scripts/FFsBeGoneScript.java

@@ -0,0 +1,107 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+//Rid us of those pesky FF's that become bad instructions
+//@category Cleanup
+
+import ghidra.app.script.GhidraScript;
+import ghidra.program.model.address.Address;
+import ghidra.program.model.data.CategoryPath;
+import ghidra.program.model.data.DataType;
+
+import java.util.Arrays;
+
+public class FFsBeGoneScript extends GhidraScript {
+	private Address addr;
+	byte[] bytes = new byte[10];
+	byte[] masks = new byte[10];
+
+	@Override
+	public void run() throws Exception {
+		DataType wordDataType =
+			currentProgram.getDataTypeManager().getDataType(new CategoryPath("/"), "word");
+		if (wordDataType == null) {
+			throw new Exception("Data type 'word' could not be found in the program.");
+		}
+		Arrays.fill(bytes, (byte) 0xff);
+		Arrays.fill(masks, (byte) 0xff);
+		addr = currentProgram.getMemory().getMinAddress();
+		advance();
+		while (addr != null && !monitor.isCancelled()) {
+			byte byt = 0;
+			try {
+				byt = currentProgram.getMemory().getByte(addr);
+			}
+			catch (Exception e) {
+				advance();
+				continue;
+			}
+			while ((byt & 0xff) == 0xff) {
+				if (isUndefinedData(addr)) {
+					try {
+						createData(addr, wordDataType);
+					}
+					catch (Exception e) {
+						println("Could not create data at " + addr.toString());
+						addr = addr.next();
+						break;
+					}
+				}
+				else {
+					break;
+				}
+				addr = currentProgram.getListing().getDefinedDataAt(addr).getMaxAddress().next();
+				try {
+					byt = currentProgram.getMemory().getByte(addr);
+				}
+				catch (Exception e) {
+					break;
+				}
+			}
+			advance();
+		}
+	}
+
+	private void advance() {
+		if (addr == null) {
+			return;
+		}
+		addr = currentProgram.getMemory().findBytes(addr, bytes, masks, true, monitor);
+		if (addr != null) {
+			if (!isUndefinedData(addr)) {
+				if (currentProgram.getListing().getInstructionContaining(addr) != null) {
+					addr =
+						currentProgram.getListing().getInstructionContaining(addr).getMaxAddress().next();
+				}
+				else if (currentProgram.getListing().getDefinedDataContaining(addr) != null) {
+					addr =
+						currentProgram.getListing().getDefinedDataContaining(addr).getMaxAddress().next();
+				}
+				advance();
+			}
+		}
+	}
+
+	private boolean isUndefinedData(Address address) {
+		if (currentProgram.getListing().getInstructionContaining(address) != null) {
+			return false;
+		}
+		if (currentProgram.getListing().getDefinedDataContaining(address) != null) {
+			return false;
+		}
+		return true;
+	}
+
+}