GP-1645 Added relative pointer action in the decompiler

Ghidra/Features/Decompiler/src/main/java/ghidra/app/plugin/core/decompile/DecompilerProvider.java

@@ -812,6 +812,9 @@ public class DecompilerProvider extends NavigatableComponentProviderAdapter
 		RetypeLocalAction retypeLocalAction = new RetypeLocalAction();
 		setGroupInfo(retypeLocalAction, variableGroup, subGroupPosition++);
 
+		CreatePointerRelative createRelativeAction = new CreatePointerRelative();
+		setGroupInfo(createRelativeAction, variableGroup, subGroupPosition++);
+
 		RetypeGlobalAction retypeGlobalAction = new RetypeGlobalAction();
 		setGroupInfo(retypeGlobalAction, variableGroup, subGroupPosition++);
 
@@ -991,6 +994,7 @@ public class DecompilerProvider extends NavigatableComponentProviderAdapter
 		addLocalAction(setEquateAction);
 		addLocalAction(removeEquateAction);
 		addLocalAction(retypeLocalAction);
+		addLocalAction(createRelativeAction);
 		addLocalAction(retypeGlobalAction);
 		addLocalAction(retypeReturnAction);
 		addLocalAction(retypeFieldAction);

Ghidra/Features/Decompiler/src/main/java/ghidra/app/plugin/core/decompile/actions/RetypeLocalAction.java

@@ -59,7 +59,11 @@ public class RetypeLocalAction extends AbstractDecompilerAction {
 		setKeyBindingData(new KeyBindingData(KeyEvent.VK_L, InputEvent.CTRL_DOWN_MASK));
 	}
 
-	private void retypeSymbol(Program program, HighSymbol highSymbol, Varnode exactSpot,
+	protected RetypeLocalAction(String name) {
+		super(name);
+	}
+
+	protected void retypeSymbol(Program program, HighSymbol highSymbol, Varnode exactSpot,
 			DataType dt, PluginTool tool) {
 		HighFunction hfunction = highSymbol.getHighFunction();
 

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/PcodeDataTypeManager.java

@@ -260,7 +260,7 @@ public class PcodeDataTypeManager {
 	 * @param offset is the offset into the base data-type
 	 * @return the inner data-type
 	 */
-	private DataType findSubType(DataType base, int offset) {
+	public static DataType findPointerRelativeInner(DataType base, int offset) {
 		if (base instanceof TypeDef) {
 			base = ((TypeDef) base).getBaseDataType();
 		}
@@ -297,7 +297,7 @@ public class PcodeDataTypeManager {
 		}
 		resBuf.append(">\n");
 		DataType parent = pointer.getDataType();
-		DataType ptrto = findSubType(parent, (int) offset);
+		DataType ptrto = findPointerRelativeInner(parent, (int) offset);
 		buildTypeRef(resBuf, ptrto, 1);
 		buildTypeRef(resBuf, parent, 1);
 		resBuf.append("\n<off>").append(offset).append("</off>\n");