GP-2834: Add Unwind Stack action, hovers for dynamic variable values.

Ghidra/Debug/TaintAnalysis/src/main/java/ghidra/pcode/emu/taint/AbstractTaintPcodeExecutorStatePiece.java

@@ -15,12 +15,16 @@
  */
 package ghidra.pcode.emu.taint;
 
+import java.util.List;
+import java.util.Map;
+
 import ghidra.pcode.emu.taint.plain.TaintSpace;
 import ghidra.pcode.exec.*;
 import ghidra.pcode.exec.PcodeArithmetic.Purpose;
 import ghidra.program.model.address.Address;
 import ghidra.program.model.address.AddressSpace;
 import ghidra.program.model.lang.Language;
+import ghidra.program.model.lang.Register;
 import ghidra.program.model.mem.MemBuffer;
 import ghidra.taint.model.TaintVec;
 
@@ -116,6 +120,11 @@ public abstract class AbstractTaintPcodeExecutorStatePiece<S extends TaintSpace>
 		return space.get(offset, size);
 	}
 
+	@Override
+	protected Map<Register, TaintVec> getRegisterValuesFromSpace(S space, List<Register> registers) {
+		return space.getRegisterValues(registers);
+	}
+	
 	@Override
 	public void clear() {
 		for (S space : spaceMap.values()) {

Ghidra/Debug/TaintAnalysis/src/main/java/ghidra/pcode/emu/taint/plain/TaintPcodeExecutorStatePiece.java

@@ -71,6 +71,21 @@ public class TaintPcodeExecutorStatePiece extends AbstractTaintPcodeExecutorStat
 			protected TaintSpace newSpace(AddressSpace space) {
 				return new TaintSpace();
 			}
+
+			@Override
+			public AbstractSpaceMap<TaintSpace> fork() {
+				throw new UnsupportedOperationException();
+			}
+
+			@Override
+			public TaintSpace fork(TaintSpace s) {
+				throw new UnsupportedOperationException();
+			}
 		};
 	}
+
+	@Override
+	public TaintPcodeExecutorStatePiece fork() {
+		throw new UnsupportedOperationException();
+	}
 }

Ghidra/Debug/TaintAnalysis/src/main/java/ghidra/pcode/emu/taint/plain/TaintSpace.java

@@ -15,10 +15,10 @@
  */
 package ghidra.pcode.emu.taint.plain;
 
-import java.util.HashMap;
-import java.util.Map;
+import java.util.*;
 
 import ghidra.pcode.emu.taint.trace.TaintTraceSpace;
+import ghidra.program.model.lang.Register;
 import ghidra.taint.model.TaintSet;
 import ghidra.taint.model.TaintVec;
 
@@ -112,4 +112,20 @@ public class TaintSpace {
 	public void clear() {
 		taints.clear();
 	}
+
+	public Map<Register, TaintVec> getRegisterValues(List<Register> registers) {
+		Map<Register, TaintVec> result = new HashMap<>();
+		for (Register r : registers) {
+			long offset = r.getAddress().getOffset();
+			TaintVec vec = new TaintVec(r.getNumBytes());
+			for (int i = 0; i < vec.length; i++) {
+				TaintSet s = taints.get(offset + i);
+				if (s == null) {
+					continue;
+				}
+			}
+			result.put(r, vec);
+		}
+		return result;
+	}
 }

Ghidra/Debug/TaintAnalysis/src/main/java/ghidra/pcode/emu/taint/trace/TaintTracePcodeExecutorStatePiece.java

@@ -82,9 +82,24 @@ public class TaintTracePcodeExecutorStatePiece
 					PcodeTracePropertyAccess<String> backing) {
 				return new TaintTraceSpace(space, property);
 			}
+
+			@Override
+			public AbstractSpaceMap<TaintTraceSpace> fork() {
+				throw new UnsupportedOperationException();
+			}
+
+			@Override
+			public TaintTraceSpace fork(TaintTraceSpace s) {
+				throw new UnsupportedOperationException();
+			}
 		};
 	}
 
+	@Override
+	public TaintTracePcodeExecutorStatePiece fork() {
+		throw new UnsupportedOperationException();
+	}
+
 	/**
 	 * {@inheritDoc}
 	 *