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GP-2020: Support for loading split dyld_shared_cache files from a GFileSystem

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This commit is contained in:
Ryan Kurtz 2022-05-19 13:36:42 -04:00
parent a4111b1592
commit 70b0602af0
1 changed files with 44 additions and 34 deletions
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78
Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/DyldCacheUtils.java
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@ -15,14 +15,16 @@
*/
package ghidra.app.util.opinion;
import java.io.*;
import java.nio.file.AccessMode;
import java.io.Closeable;
import java.io.IOException;
import java.util.*;
import ghidra.app.util.bin.*;
import ghidra.app.util.bin.BinaryReader;
import ghidra.app.util.bin.ByteProvider;
import ghidra.app.util.bin.format.macho.dyld.DyldArchitecture;
import ghidra.app.util.bin.format.macho.dyld.DyldCacheHeader;
import ghidra.app.util.importer.MessageLog;
import ghidra.formats.gfilesystem.*;
import ghidra.program.model.address.Address;
import ghidra.program.model.listing.Program;
import ghidra.program.model.mem.MemoryAccessException;
@ -101,8 +103,9 @@ public class DyldCacheUtils {
*/
public static class SplitDyldCache implements Closeable {
List<ByteProvider> providers = new ArrayList<>();
List<DyldCacheHeader> headers = new ArrayList<>();
private List<ByteProvider> providers = new ArrayList<>();
private List<DyldCacheHeader> headers = new ArrayList<>();
private FileSystemService fsService;
/**
* Creates a new {@link SplitDyldCache}
@ -127,17 +130,23 @@ public class DyldCacheUtils {
headers.add(baseHeader);
// Setup additional "split" DYLD Caches (if applicable)
for (File splitFile : getSplitDyldCacheFiles(baseProvider, shouldCombineSplitFiles)) {
monitor.setMessage("Parsing " + splitFile.getName() + " headers...");
ByteProvider provider = new FileByteProvider(splitFile, null, AccessMode.READ);
if (!DyldCacheUtils.isDyldCache(provider)) {
if (!shouldCombineSplitFiles) {
return;
}
fsService = FileSystemService.getInstance();
for (FSRL splitFSRL : findSplitDyldCacheFiles(baseProvider.getFSRL(), monitor)) {
monitor.setMessage("Parsing " + splitFSRL.getName() + " headers...");
ByteProvider splitProvider = fsService.getByteProvider(splitFSRL, false, monitor);
if (!DyldCacheUtils.isDyldCache(splitProvider)) {
splitProvider.close();
continue;
}
providers.add(provider);
DyldCacheHeader splitHeader = new DyldCacheHeader(new BinaryReader(provider, true));
providers.add(splitProvider);
DyldCacheHeader splitHeader =
new DyldCacheHeader(new BinaryReader(splitProvider, true));
splitHeader.parseFromFile(shouldProcessSymbols, log, monitor);
headers.add(splitHeader);
log.appendMsg("Including split DYLD: " + splitFile.getName());
log.appendMsg("Including split DYLD: " + splitProvider.getName());
}
}
@ -180,36 +189,37 @@ public class DyldCacheUtils {
}
/**
* Gets a {@link List} of extra split DYLD Cache files to load, sorted by name (base
* DYLD Cache file not included)
* Finds a {@link List} of extra split DYLD Cache {@link FSRL files} to load, sorted by
* name (base DYLD Cache file not included)
*
* @param baseProvider The base {@link ByteProvider} that contains the DYLD Cache bytes
* @param shouldCombineSplitFiles True if split DYLD Cache files should be automatically
* combined into one DYLD Cache; false if only the base file should be processed
* @return A {@link List} of extra split DYLD Cache files to load, sorted by name (base
* DYLD Cache file not included).
* @param baseFSRL The {@link FSRL} that contains the base DYLD Cache
* @return A {@link List} of extra split DYLD Cache {@link FSRL files} to load, sorted by
* name (base DYLD Cache provider not included).
* @throws IOException If there was an IO-related issue finding the files
* @throws CancelledException If the user canceled the operation
*/
private List<File> getSplitDyldCacheFiles(ByteProvider baseProvider,
boolean shouldCombineSplitFiles) {
File file = baseProvider.getFile();
if (file != null && shouldCombineSplitFiles) {
String baseName = file.getName();
File[] splitFiles = file.getParentFile().listFiles(f -> {
private List<FSRL> findSplitDyldCacheFiles(FSRL baseFSRL, TaskMonitor monitor)
throws CancelledException, IOException {
if (baseFSRL == null) {
return Collections.emptyList();
}
try (FileSystemRef fsRef = fsService.getFilesystem(baseFSRL.getFS(), monitor)) {
GFileSystem fs = fsRef.getFilesystem();
GFile baseFile = fs.lookup(baseFSRL.getPath());
String baseName = baseFile.getName();
List<FSRL> ret = new ArrayList<>();
for (GFile f : fs.getListing(baseFile.getParentFile())) {
if (!f.getName().startsWith(baseName + ".")) {
return false;
continue;
}
if (f.getName().toLowerCase().endsWith(".map")) {
return false;
continue;
}
return true;
});
if (splitFiles != null) {
List<File> list = Arrays.asList(splitFiles);
Collections.sort(list);
return list;
ret.add(f.getFSRL());
}
ret.sort((f1, f2) -> f1.getName().compareTo(f2.getName()));
return ret;
}
return Collections.emptyList();
}
}
}