mirror of
https://github.com/NationalSecurityAgency/ghidra.git
synced 2024-11-25 13:42:06 +00:00
GP-3596: Updating DyldCacheHeader fields and simplifying code
This commit is contained in:
Ryan Kurtz
parent
d2be76feb7
commit
e24ee64937
@ -56,8 +56,8 @@ public class DyldCacheHeader implements StructConverter {
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private long cacheType;
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private int branchPoolsOffset;
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private int branchPoolsCount;
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private long accelerateInfoAddr;
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private long accelerateInfoSize;
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private long accelerateInfoAddr_dyldInCacheMH;
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private long accelerateInfoSize_dyldInCacheEntry;
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private long imagesTextOffset;
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private long imagesTextCount;
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private long patchInfoAddr;
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@ -101,7 +101,7 @@ public class DyldCacheHeader implements StructConverter {
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private long swiftOptsOffset;
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private long swiftOptsSize;
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private int subCacheArrayOffset;
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private int subCacheArrayCount;
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private Integer subCacheArrayCount;
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private byte[] symbolFileUUID;
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private long rosettaReadOnlyAddr;
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private long rosettaReadOnlySize;
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@ -109,8 +109,14 @@ public class DyldCacheHeader implements StructConverter {
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private long rosettaReadWriteSize;
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private int imagesOffset;
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private int imagesCount;
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private Integer cacheSubType;
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private long objcOptsOffset;
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private long objcOptsSize;
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private long cacheAtlasOffset;
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private long cacheAtlasSize;
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private long dynamicDataOffset;
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private long dynamicDataMaxSize;
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private int headerType;
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private int headerSize;
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private BinaryReader reader;
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private long baseAddress;
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@ -136,18 +142,13 @@ public class DyldCacheHeader implements StructConverter {
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this.reader = reader;
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long startIndex = reader.getPointerIndex();
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// HEADER 1: https://opensource.apple.com/source/dyld/dyld-95.3/launch-cache/dyld_cache_format.h.auto.html
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headerType = 1;
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magic = reader.readNextByteArray(16);
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mappingOffset = reader.readNextInt();
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mappingCount = reader.readNextInt();
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imagesOffsetOld = reader.readNextInt();
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imagesCountOld = reader.readNextInt();
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dyldBaseAddress = reader.readNextLong();
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// HEADER 2: https://opensource.apple.com/source/dyld/dyld-195.5/launch-cache/dyld_cache_format.h.auto.html
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if (reader.getPointerIndex() < mappingOffset) {
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headerType = 2;
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codeSignatureOffset = reader.readNextLong();
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codeSignatureSize = reader.readNextLong();
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}
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@ -155,40 +156,33 @@ public class DyldCacheHeader implements StructConverter {
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slideInfoOffset = reader.readNextLong();
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slideInfoSize = reader.readNextLong();
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}
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// HEADER 3: No header file for this version (without the following UUID), but there are images of this version
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if (reader.getPointerIndex() < mappingOffset) {
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headerType = 3;
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localSymbolsOffset = reader.readNextLong();
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localSymbolsSize = reader.readNextLong();
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}
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// HEADER 4: https://opensource.apple.com/source/dyld/dyld-239.3/launch-cache/dyld_cache_format.h.auto.html
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if (reader.getPointerIndex() < mappingOffset) {
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headerType = 4;
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uuid = reader.readNextByteArray(16);
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}
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// HEADER 5: https://opensource.apple.com/source/dyld/dyld-360.14/launch-cache/dyld_cache_format.h.auto.html
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if (reader.getPointerIndex() < mappingOffset) {
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headerType = 5;
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cacheType = reader.readNextLong();
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}
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// HEADER 6: https://opensource.apple.com/source/dyld/dyld-421.1/launch-cache/dyld_cache_format.h.auto.html
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if (reader.getPointerIndex() < mappingOffset) {
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headerType = 6;
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branchPoolsOffset = reader.readNextInt();
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branchPoolsCount = reader.readNextInt();
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accelerateInfoAddr = reader.readNextLong();
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accelerateInfoSize = reader.readNextLong();
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imagesTextOffset = reader.readNextLong();
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imagesTextCount = reader.readNextLong();
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}
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// HEADER 7: https://opensource.apple.com/source/dyld/dyld-832.7.1/dyld3/shared-cache/dyld_cache_format.h.auto.html
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if (reader.getPointerIndex() < mappingOffset) {
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headerType = 7;
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branchPoolsCount = reader.readNextInt();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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accelerateInfoAddr_dyldInCacheMH = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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accelerateInfoSize_dyldInCacheEntry = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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imagesTextOffset = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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imagesTextCount = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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patchInfoAddr = reader.readNextLong();
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@ -265,11 +259,6 @@ public class DyldCacheHeader implements StructConverter {
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if (reader.getPointerIndex() < mappingOffset) {
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mappingWithSlideCount = reader.readNextInt();
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}
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// HEADER 8: https://github.com/apple-oss-distributions/dyld/blob/dyld-940/cache-builder/dyld_cache_format.h
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if (reader.getPointerIndex() < mappingOffset) {
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headerType = 8;
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}
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if (reader.getPointerIndex() < mappingOffset) {
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dylibsPBLStateArrayAddrUnused = reader.readNextLong();
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}
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@ -337,9 +326,29 @@ public class DyldCacheHeader implements StructConverter {
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if (reader.getPointerIndex() < mappingOffset) {
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imagesCount = reader.readNextInt();
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}
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// HEADER 9: <unknown>
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if (reader.getPointerIndex() < mappingOffset) {
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headerType = 9;
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cacheSubType = reader.readNextInt();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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padding = reader.readNextInt();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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objcOptsOffset = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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objcOptsSize = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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cacheAtlasOffset = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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cacheAtlasSize = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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dynamicDataOffset = reader.readNextLong();
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}
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if (reader.getPointerIndex() < mappingOffset) {
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dynamicDataMaxSize = reader.readNextLong();
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}
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headerSize = (int) (reader.getPointerIndex() - startIndex);
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@ -366,29 +375,20 @@ public class DyldCacheHeader implements StructConverter {
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*/
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public void parseFromFile(boolean parseLocalSymbols, MessageLog log, TaskMonitor monitor)
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throws CancelledException {
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if (headerType >= 1) {
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parseMappingInfo(log, monitor);
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parseImageInfo(log, monitor);
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}
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if (headerType >= 3) {
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if (parseLocalSymbols) {
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parseLocalSymbolsInfo(log, monitor);
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}
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}
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if (headerType >= 6) {
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parseBranchPools(log, monitor);
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parseImageTextInfo(log, monitor);
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}
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if (headerType >= 8) {
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parseSubcaches(log, monitor);
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}
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parseMappingInfo(log, monitor);
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parseImageInfo(log, monitor);
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parseLocalSymbolsInfo(parseLocalSymbols, log, monitor);
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parseBranchPools(log, monitor);
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parseImageTextInfo(log, monitor);
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parseSubcaches(log, monitor);
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parseCacheMappingSlideInfo(log, monitor);
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if (hasSlideInfo()) {
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parseSlideInfos(log, monitor);
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}
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parseSlideInfos(log, monitor);
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}
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private void parseSlideInfos(MessageLog log, TaskMonitor monitor) throws CancelledException {
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if (!hasSlideInfo()) {
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return;
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}
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if (slideInfoOffset != 0) {
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DyldCacheSlideInfoCommon slideInfo = parseSlideInfo(slideInfoOffset, log, monitor);
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if (slideInfo != null) {
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@ -445,9 +445,7 @@ public class DyldCacheHeader implements StructConverter {
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*/
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public void parseFromMemory(Program program, AddressSpace space, MessageLog log,
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TaskMonitor monitor) throws CancelledException {
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if (headerType >= 6) {
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parseAcceleratorInfo(program, space, log, monitor);
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}
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parseAcceleratorInfo(program, space, log, monitor);
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}
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/**
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@ -462,31 +460,17 @@ public class DyldCacheHeader implements StructConverter {
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*/
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public void markup(Program program, boolean markupLocalSymbols, AddressSpace space,
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TaskMonitor monitor, MessageLog log) throws CancelledException {
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if (headerType >= 1) {
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markupHeader(program, space, monitor, log);
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markupMappingInfo(program, space, monitor, log);
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markupImageInfo(program, space, monitor, log);
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}
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if (headerType >= 2) {
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markupCodeSignature(program, space, monitor, log);
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markupSlideInfo(program, space, monitor, log);
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}
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if (headerType >= 3) {
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if (markupLocalSymbols) {
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markupLocalSymbolsInfo(program, space, monitor, log);
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}
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}
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if (headerType >= 6) {
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markupBranchPools(program, space, monitor, log);
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markupAcceleratorInfo(program, space, monitor, log);
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markupImageTextInfo(program, space, monitor, log);
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}
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if (headerType >= 8) {
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markupSubcacheEntries(program, space, monitor, log);
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}
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if (mappingWithSlideOffset >= 0) {
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markupCacheMappingSlideInfo(program, space, log, monitor);
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}
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markupHeader(program, space, monitor, log);
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markupMappingInfo(program, space, monitor, log);
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markupImageInfo(program, space, monitor, log);
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markupLocalSymbolsInfo(markupLocalSymbols, program, space, monitor, log);
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markupCodeSignature(program, space, monitor, log);
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markupSlideInfo(program, space, monitor, log);
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markupBranchPools(program, space, monitor, log);
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markupAcceleratorInfo(program, space, monitor, log);
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markupImageTextInfo(program, space, monitor, log);
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markupSubcacheEntries(program, space, monitor, log);
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markupCacheMappingSlideInfo(program, space, log, monitor);
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}
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/**
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@ -643,47 +627,32 @@ public class DyldCacheHeader implements StructConverter {
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StructureDataType struct = new StructureDataType("dyld_cache_header", 0);
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// @formatter:off
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// headerType 1
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//
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addHeaderField(struct, new ArrayDataType(ASCII, 16, 1), "magic","e.g. \"dyld_v0 i386\"");
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addHeaderField(struct, DWORD, "mappingOffset","file offset to first dyld_cache_mapping_info");
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addHeaderField(struct, DWORD, "mappingCount", "number of dyld_cache_mapping_info entries");
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addHeaderField(struct, DWORD, "imagesOffsetOld", "UNUSED: moved to imagesOffset to prevent older dsc_extarctors from crashing");
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addHeaderField(struct, DWORD, "imagesCountOld", "UNUSED: moved to imagesCount to prevent older dsc_extarctors from crashing");
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addHeaderField(struct, QWORD, "dyldBaseAddress","base address of dyld when cache was built");
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// headerType 2
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//
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addHeaderField(struct, QWORD, "codeSignatureOffset", "file offset of code signature blob");
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addHeaderField(struct, QWORD, "codeSignatureSize","size of code signature blob (zero means to end of file)");
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addHeaderField(struct, QWORD, "slideInfoOffset", "file offset of kernel slid info");
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addHeaderField(struct, QWORD, "slideInfoSize", "size of kernel slid info");
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// headerType 3
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//
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addHeaderField(struct, QWORD, "localSymbolsOffset","file offset of where local symbols are stored");
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addHeaderField(struct, QWORD, "localSymbolsSize", "size of local symbols information");
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// headerType 4
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//
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addHeaderField(struct, new ArrayDataType(BYTE, 16, 1), "uuid","unique value for each shared cache file");
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// headerType 5
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//
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addHeaderField(struct, QWORD, "cacheType", "0 for development, 1 for production");
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// headerType 6
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//
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addHeaderField(struct, DWORD, "branchPoolsOffset","file offset to table of uint64_t pool addresses");
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addHeaderField(struct, DWORD, "branchPoolsCount", "number of uint64_t entries");
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addHeaderField(struct, QWORD, "accelerateInfoAddr","(unslid) address of optimization info");
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addHeaderField(struct, QWORD, "accelerateInfoSize", "size of optimization info");
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if (hasAccelerateInfo()) {
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addHeaderField(struct, QWORD, "accelerateInfoAddr","(unslid) address of optimization info");
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addHeaderField(struct, QWORD, "accelerateInfoSize", "size of optimization info");
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}
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else {
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addHeaderField(struct, QWORD, "dyldInCacheMH","(unslid) address of mach_header of dyld in cache");
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addHeaderField(struct, QWORD, "dyldInCacheEntry", "(unslid) address of entry point (_dyld_start) of dyld in cache");
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}
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addHeaderField(struct, QWORD, "imagesTextOffset","file offset to first dyld_cache_image_text_info");
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addHeaderField(struct, QWORD, "imagesTextCount","number of dyld_cache_image_text_info entries");
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// headerType 7
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//
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addHeaderField(struct, QWORD, "patchInfoAddr", "(unslid) address of dyld_cache_patch_info");
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addHeaderField(struct, QWORD, "patchInfoSize", "Size of all of the patch information pointed to via the dyld_cache_patch_info");
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addHeaderField(struct, QWORD, "otherImageGroupAddrUnused", "unused");
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@ -707,9 +676,6 @@ public class DyldCacheHeader implements StructConverter {
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addHeaderField(struct, QWORD, "otherTrieSize","size of trie of dylibs and bundles with dlopen closures");
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addHeaderField(struct, DWORD, "mappingWithSlideOffset","file offset to first dyld_cache_mapping_and_slide_info");
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addHeaderField(struct, DWORD, "mappingWithSlideCount","number of dyld_cache_mapping_and_slide_info entries");
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// headerType 8
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//
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addHeaderField(struct, QWORD, "dylibsPBLStateArrayAddrUnused", "unused");
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addHeaderField(struct, QWORD, "dylibsPBLSetAddr", "(unslid) address of PrebuiltLoaderSet of all cached dylibs");
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addHeaderField(struct, QWORD, "programsPBLSetPoolAddr", "(unslid) address of pool of PrebuiltLoaderSet for each program ");
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@ -730,6 +696,14 @@ public class DyldCacheHeader implements StructConverter {
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addHeaderField(struct, QWORD, "rosettaReadWriteSize", "maximum size of the Rosetta read-write region");
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addHeaderField(struct, DWORD, "imagesOffset", "file offset to first dyld_cache_image_info");
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addHeaderField(struct, DWORD, "imagesCount", "number of dyld_cache_image_info entries");
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addHeaderField(struct, DWORD, "cacheSubType", "0 for development, 1 for production, when cacheType is multi-cache(2)");
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addHeaderField(struct, DWORD, "padding", "");
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addHeaderField(struct, QWORD, "objcOptsOffset", "VM offset from cache_header* to ObjC optimizations header");
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addHeaderField(struct, QWORD, "objcOptsSize", "size of ObjC optimizations header");
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addHeaderField(struct, QWORD, "cacheAtlasOffset", "VM offset from cache_header* to embedded cache atlas for process introspection");
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addHeaderField(struct, QWORD, "cacheAtlasSize", "size of embedded cache atlas");
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addHeaderField(struct, QWORD, "dynamicDataOffset", "VM offset from cache_header* to the location of dyld_cache_dynamic_data_header");
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addHeaderField(struct, QWORD, "dynamicDataMaxSize", "maximum size of space reserved from dynamic data");
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// @formatter:on
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struct.setCategoryPath(new CategoryPath(MachConstants.DATA_TYPE_CATEGORY));
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@ -789,9 +763,9 @@ public class DyldCacheHeader implements StructConverter {
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return slideInfo;
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}
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private void parseLocalSymbolsInfo(MessageLog log, TaskMonitor monitor)
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private void parseLocalSymbolsInfo(boolean shouldParse, MessageLog log, TaskMonitor monitor)
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throws CancelledException {
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if (localSymbolsOffset == 0) {
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if (!shouldParse || localSymbolsOffset == 0) {
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return;
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}
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monitor.setMessage("Parsing DYLD local symbols info...");
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@ -856,7 +830,7 @@ public class DyldCacheHeader implements StructConverter {
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try {
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reader.setPointerIndex(subCacheArrayOffset);
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for (int i = 0; i < subCacheArrayCount; ++i) {
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subcacheEntryList.add(new DyldSubcacheEntry(reader, headerType));
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subcacheEntryList.add(new DyldSubcacheEntry(reader));
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monitor.checkCancelled();
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monitor.incrementProgress(1);
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}
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@ -869,12 +843,12 @@ public class DyldCacheHeader implements StructConverter {
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private void parseAcceleratorInfo(Program program, AddressSpace space, MessageLog log,
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TaskMonitor monitor) throws CancelledException {
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if (accelerateInfoAddr == 0 || headerType >= 9) {
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if (!hasAccelerateInfo() || accelerateInfoAddr_dyldInCacheMH == 0) {
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return;
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}
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monitor.setMessage("Parsing DYLD accelerateor info...");
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monitor.initialize(imagesTextCount);
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Address addr = space.getAddress(accelerateInfoAddr);
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Address addr = space.getAddress(accelerateInfoAddr_dyldInCacheMH);
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try (ByteProvider bytes = new MemoryByteProvider(program.getMemory(), addr)) {
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BinaryReader memoryReader =
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new BinaryReader(bytes, !program.getLanguage().isBigEndian());
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@ -1002,8 +976,11 @@ public class DyldCacheHeader implements StructConverter {
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}
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}
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private void markupLocalSymbolsInfo(Program program, AddressSpace space, TaskMonitor monitor,
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MessageLog log) throws CancelledException {
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private void markupLocalSymbolsInfo(boolean shouldMarkup, Program program, AddressSpace space,
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TaskMonitor monitor, MessageLog log) throws CancelledException {
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if (!shouldMarkup) {
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return;
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}
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monitor.setMessage("Marking up DYLD local symbols info...");
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monitor.initialize(1);
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try {
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@ -1047,8 +1024,8 @@ public class DyldCacheHeader implements StructConverter {
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monitor.setMessage("Marking up DYLD accelerator info...");
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monitor.initialize(1);
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try {
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if (accelerateInfo != null && headerType < 9) {
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Address addr = space.getAddress(accelerateInfoAddr);
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if (hasAccelerateInfo() && accelerateInfo != null) {
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Address addr = space.getAddress(accelerateInfoAddr_dyldInCacheMH);
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DataUtilities.createData(program, addr, accelerateInfo.toDataType(), -1,
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DataUtilities.ClearDataMode.CHECK_FOR_SPACE);
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accelerateInfo.markup(program, addr, monitor, log);
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@ -1157,11 +1134,9 @@ public class DyldCacheHeader implements StructConverter {
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// this is no longer used, but if non-zero, is older format and has slide-info
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return true;
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}
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if (headerType > 6) {
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for (DyldCacheMappingAndSlideInfo info : cacheMappingAndSlideInfoList) {
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if (info.getSlideInfoFileSize() != 0) {
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return true;
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}
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for (DyldCacheMappingAndSlideInfo info : cacheMappingAndSlideInfoList) {
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if (info.getSlideInfoFileSize() != 0) {
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return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
@ -1179,9 +1154,19 @@ public class DyldCacheHeader implements StructConverter {
|
||||
/**
|
||||
* Checks to see whether or not this is a subcache
|
||||
*
|
||||
* @return True if this is a subcache; otherwise, false if its a base cache
|
||||
* @return True if this is a subcache; otherwise, false if it's a base cache
|
||||
*/
|
||||
public boolean isSubcache() {
|
||||
return headerType >= 8 && subCacheArrayCount == 0 && symbolFileUUID == null;
|
||||
return subCacheArrayCount != null && subCacheArrayCount == 0 && symbolFileUUID == null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks to see whether or not the old accelerate info fields are being used
|
||||
*
|
||||
* @return True if the old accelerate info fields are being used; otherwise, false if the new
|
||||
* dyldInCache fields are being used
|
||||
*/
|
||||
public boolean hasAccelerateInfo() {
|
||||
return cacheSubType == null;
|
||||
}
|
||||
}
|
||||
|
||||
@ -36,21 +36,19 @@ public class DyldSubcacheEntry implements StructConverter {
|
||||
private long cacheVMOffset;
|
||||
private byte[] cacheExtension;
|
||||
|
||||
private long headerType;
|
||||
|
||||
/**
|
||||
* Create a new {@link DyldSubcacheEntry}.
|
||||
*
|
||||
* @param reader A {@link BinaryReader} positioned at the start of a DYLD subCache entry
|
||||
* @param headerType The header type value
|
||||
* @throws IOException if there was an IO-related problem creating the DYLD subCache entry
|
||||
*/
|
||||
public DyldSubcacheEntry(BinaryReader reader, long headerType) throws IOException {
|
||||
this.headerType = headerType;
|
||||
|
||||
public DyldSubcacheEntry(BinaryReader reader) throws IOException {
|
||||
uuid = reader.readNextByteArray(16);
|
||||
cacheVMOffset = reader.readNextLong();
|
||||
if (supportsCacheExtension()) {
|
||||
|
||||
// A bit of a hack. Is there a safer way to know if you are reading a dyld_subcache_entry
|
||||
// or a dyld_subcache_entry_v1?
|
||||
if (reader.readByte(reader.getPointerIndex()) == '.') {
|
||||
cacheExtension = reader.readNextByteArray(32);
|
||||
}
|
||||
}
|
||||
@ -97,20 +95,11 @@ public class DyldSubcacheEntry implements StructConverter {
|
||||
struct.add(new ArrayDataType(BYTE, 16, 1), "uuid", "The UUID of the subCache file");
|
||||
struct.add(QWORD, "cacheVMOffset",
|
||||
"The offset of this subcache from the main cache base address");
|
||||
if (supportsCacheExtension()) {
|
||||
if (cacheExtension != null) {
|
||||
struct.add(new ArrayDataType(ASCII, 32, 1), "cacheExtension",
|
||||
"The extension of the subCache file");
|
||||
}
|
||||
struct.setCategoryPath(new CategoryPath(MachConstants.DATA_TYPE_CATEGORY));
|
||||
return struct;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks to see if the subCache extension is known
|
||||
*
|
||||
* @return True if the subCache extension is known; otherwise, false
|
||||
*/
|
||||
private boolean supportsCacheExtension() {
|
||||
return headerType >= 9;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user