Let AddressSpace do segment selector assignment in NeLoader

Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/ne/NewExecutable.java

@@ -1,6 +1,5 @@
 /* ###
  * IP: GHIDRA
- * REVIEWED: YES
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,12 +15,13 @@
  */
 package ghidra.app.util.bin.format.ne;
 
-import generic.continues.*;
-import ghidra.app.util.bin.*;
-import ghidra.app.util.bin.format.*;
-import ghidra.app.util.bin.format.mz.*;
+import java.io.IOException;
 
-import java.io.*;
+import generic.continues.GenericFactory;
+import ghidra.app.util.bin.ByteProvider;
+import ghidra.app.util.bin.format.FactoryBundledWithBinaryReader;
+import ghidra.app.util.bin.format.mz.DOSHeader;
+import ghidra.program.model.address.SegmentedAddress;
 
 /**
  * A class to manage loading New Executables (NE).
@@ -34,17 +34,20 @@ public class NewExecutable {
     private WindowsHeader winHeader;
 
     /**
-     * Constructs a new instance of an new executable.
-     * @param bp the byte provider
-     * @throws IOException if an I/O error occurs.
-     */
-    public NewExecutable(GenericFactory factory, ByteProvider bp) throws IOException {
+	 * Constructs a new instance of an new executable.
+	 * @param factory is the object factory to bundle with the reader
+	 * @param bp the byte provider
+	 * @param baseAddr the image base of the executable
+	 * @throws IOException if an I/O error occurs.
+	 */
+	public NewExecutable(GenericFactory factory, ByteProvider bp, SegmentedAddress baseAddr)
+			throws IOException {
         reader = new FactoryBundledWithBinaryReader(factory, bp, true);
         dosHeader = DOSHeader.createDOSHeader(reader);
 
         if (dosHeader.isDosSignature()) {
             try {
-                winHeader = new WindowsHeader(reader, (short)dosHeader.e_lfanew());
+				winHeader = new WindowsHeader(reader, baseAddr, (short) dosHeader.e_lfanew());
             }
             catch (InvalidWindowsHeaderException e) {
             }

Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/ne/SegmentTable.java

@@ -1,6 +1,5 @@
 /* ###
  * IP: GHIDRA
- * REVIEWED: YES
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +17,9 @@ package ghidra.app.util.bin.format.ne;
 
 import java.io.IOException;
 
-import ghidra.app.util.bin.format.*;
+import ghidra.app.util.bin.format.FactoryBundledWithBinaryReader;
+import ghidra.program.model.address.SegmentedAddress;
+import ghidra.program.model.address.SegmentedAddressSpace;
 import ghidra.util.Conv;
 
 /**
@@ -28,7 +29,8 @@ import ghidra.util.Conv;
 public class SegmentTable {
     private Segment [] segments;
 
-    SegmentTable(FactoryBundledWithBinaryReader reader, short index, short segmentCount, short shiftAlignCount) throws IOException {
+	SegmentTable(FactoryBundledWithBinaryReader reader, SegmentedAddress baseAddr, short index,
+			short segmentCount, short shiftAlignCount) throws IOException {
         long oldIndex = reader.getPointerIndex();
         reader.setPointerIndex(Conv.shortToInt(index));
 
@@ -39,14 +41,29 @@ public class SegmentTable {
 
         segments = new Segment[segmentCountInt];
 
-        int startOffset = 0;
+		SegmentedAddressSpace space;
+		int curSegment;
+		if (baseAddr != null) {
+			space = (SegmentedAddressSpace) baseAddr.getAddressSpace();
+			curSegment = baseAddr.getSegment();
+		}
+		else {
+			space = null;
+			curSegment = 0;
+		}
         for (int i = 0 ; i < segmentCountInt ; ++i) {
-            segments[i] = new Segment(reader, shiftAlignCount, startOffset >> 4);
+			segments[i] = new Segment(reader, shiftAlignCount, curSegment);
             int size = segments[i].getMinAllocSize() & 0xffff;
             if (size == 0) {
             	size = 0x10000;
             }
-            startOffset = (startOffset + size + 0xf) & ~0xf;
+			if (space != null) {
+				SegmentedAddress endAddr = space.getAddress(curSegment, size - 1);
+				curSegment = space.getNextOpenSegment(endAddr);
+			}
+			else {
+				curSegment += 1;
+			}
         }
 
         reader.setPointerIndex(oldIndex);

Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/ne/WindowsHeader.java

@@ -1,6 +1,5 @@
 /* ###
  * IP: GHIDRA
- * REVIEWED: YES
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,9 +15,11 @@
  */
 package ghidra.app.util.bin.format.ne;
 
-import ghidra.app.util.bin.format.*;
 import java.io.IOException;
 
+import ghidra.app.util.bin.format.FactoryBundledWithBinaryReader;
+import ghidra.program.model.address.SegmentedAddress;
+
 /**
  * A class to represent and parse the 
  * Windows new-style executable (NE) header.
@@ -39,20 +40,22 @@ public class WindowsHeader {
     private NonResidentNameTable nonResNameTable;
 
     /**
-     * Constructor
-     * @param reader the binary reader
-     * @param index the index where the windows headers begins
-     * @throws InvalidWindowsHeaderException if the bytes defined in the binary reader at
-     * the specified index do not constitute a valid windows header.
-     */
-    public WindowsHeader(FactoryBundledWithBinaryReader reader, short index) throws InvalidWindowsHeaderException, IOException {
+	 * Constructor
+	 * @param reader the binary reader
+	 * @param baseAddr the image base address
+	 * @param index the index where the windows headers begins
+	 * @throws InvalidWindowsHeaderException if the bytes defined in the binary reader at
+	 * the specified index do not constitute a valid windows header.
+	 * @throws IOException for problems reading the header bytes
+	 */
+	public WindowsHeader(FactoryBundledWithBinaryReader reader, SegmentedAddress baseAddr,
+			short index) throws InvalidWindowsHeaderException, IOException {
         this.infoBlock = new InformationBlock(reader, index);
 
         short segTableIndex = (short)(infoBlock.getSegmentTableOffset() + index);
         this.segTable = new SegmentTable(reader,
-                                        segTableIndex,
-                                        infoBlock.getSegmentCount(),
-                                        infoBlock.getSegmentAlignmentShiftCount());
+			baseAddr, segTableIndex, infoBlock.getSegmentCount(),
+			infoBlock.getSegmentAlignmentShiftCount());
 
         //if resource table offset == resident name table offset, then
         //we do not have any resources...

Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/NeLoader.java

@@ -51,6 +51,7 @@ public class NeLoader extends AbstractLibrarySupportLoader {
 
 	private static final String TAB = "    ";
 	private static final long MIN_BYTE_LENGTH = 4;
+	private static final int SEGMENT_START = 0x1000;
 
 	private ArrayList<Address> entryPointList = new ArrayList<>();
 	private Comparator<String> comparator = new CallNameComparator();
@@ -65,7 +66,7 @@ public class NeLoader extends AbstractLibrarySupportLoader {
 		if (provider.length() < MIN_BYTE_LENGTH) {
 			return loadSpecs;
 		}
-		NewExecutable ne = new NewExecutable(RethrowContinuesFactory.INSTANCE, provider);
+		NewExecutable ne = new NewExecutable(RethrowContinuesFactory.INSTANCE, provider, null);
 		WindowsHeader wh = ne.getWindowsHeader();
 		if (wh != null) {
 			List<QueryResult> results = QueryOpinionService.query(getName(),
@@ -99,7 +100,9 @@ public class NeLoader extends AbstractLibrarySupportLoader {
 		// the original bytes.
 		MemoryBlockUtils.createFileBytes(prog, provider, monitor);
 
-		NewExecutable ne = new NewExecutable(factory, provider);
+		SegmentedAddressSpace space =
+			(SegmentedAddressSpace) prog.getAddressFactory().getDefaultAddressSpace();
+		NewExecutable ne = new NewExecutable(factory, provider, space.getAddress(SEGMENT_START, 0));
 		WindowsHeader wh = ne.getWindowsHeader();
 		InformationBlock ib = wh.getInformationBlock();
 		SegmentTable st = wh.getSegmentTable();
@@ -113,8 +116,6 @@ public class NeLoader extends AbstractLibrarySupportLoader {
 		Listing listing = prog.getListing();
 		SymbolTable symbolTable = prog.getSymbolTable();
 		Memory memory = prog.getMemory();
-		SegmentedAddressSpace space =
-			(SegmentedAddressSpace) prog.getAddressFactory().getDefaultAddressSpace();
 		ProgramContext context = prog.getProgramContext();
 		RelocationTable relocTable = prog.getRelocationTable();
 

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/address/ProtectedAddressSpace.java

@@ -69,7 +69,8 @@ public class ProtectedAddressSpace extends SegmentedAddressSpace {
 	@Override
 	public int getNextOpenSegment(Address addr) {
 		int res = getDefaultSegmentFromFlat(addr.getOffset());
-		res += 1;
+		// Advance the selector by 8, accounting for the descriptor table bit and the privilege level bits
+		res = (res + 8) & 0xfff8;
 		return res;
 	}
 }