[llvm-readobj] Dump the COFF image load config

This includes the safe SEH tables and the control flow guard function
table. LLD will emit the guard table soon, and I need a tool that dumps
them for testing.

llvm-svn: 305979

1 files changed, 89 insertions, 11 deletions

diff --git a/llvm/include/llvm/Object/COFF.h b/llvm/include/llvm/Object/COFF.h
index ae695a52959..bf0172822d3 100644
--- a/llvm/include/llvm/Object/COFF.h
+++ b/llvm/include/llvm/Object/COFF.h
@@ -562,8 +562,26 @@ struct coff_tls_directory {
 using coff_tls_directory32 = coff_tls_directory<support::little32_t>;
 using coff_tls_directory64 = coff_tls_directory<support::little64_t>;
 
+/// Bits in control flow guard flags as we understand them.
+enum class coff_guard_flags : uint32_t {
+  CFInstrumented = 0x00000100,
+  HasFidTable = 0x00000400,
+  ProtectDelayLoadIAT = 0x00001000,
+  DelayLoadIATSection = 0x00002000, // Delay load in separate section
+  HasLongJmpTable = 0x00010000,
+  FidTableHasFlags = 0x10000000, // Indicates that fid tables are 5 bytes
+};
+
+struct coff_load_config_code_integrity {
+  support::ulittle16_t Flags;
+  support::ulittle16_t Catalog;
+  support::ulittle32_t CatalogOffset;
+  support::ulittle32_t Reserved;
+};
+
+/// 32-bit load config (IMAGE_LOAD_CONFIG_DIRECTORY32)
 struct coff_load_configuration32 {
-  support::ulittle32_t Characteristics;
+  support::ulittle32_t Size;
   support::ulittle32_t TimeDateStamp;
   support::ulittle16_t MajorVersion;
   support::ulittle16_t MinorVersion;
@@ -578,34 +596,81 @@ struct coff_load_configuration32 {
   support::ulittle32_t ProcessAffinityMask;
   support::ulittle32_t ProcessHeapFlags;
   support::ulittle16_t CSDVersion;
-  support::ulittle16_t Reserved;
+  support::ulittle16_t DependentLoadFlags;
   support::ulittle32_t EditList;
   support::ulittle32_t SecurityCookie;
   support::ulittle32_t SEHandlerTable;
   support::ulittle32_t SEHandlerCount;
+
+  // Added in MSVC 2015 for /guard:cf.
+  support::ulittle32_t GuardCFCheckFunction;
+  support::ulittle32_t GuardCFCheckDispatch;
+  support::ulittle32_t GuardCFFunctionTable;
+  support::ulittle32_t GuardCFFunctionCount;
+  support::ulittle32_t GuardFlags; // coff_guard_flags
+
+  // Added in MSVC 2017
+  coff_load_config_code_integrity CodeIntegrity;
+  support::ulittle32_t GuardAddressTakenIatEntryTable;
+  support::ulittle32_t GuardAddressTakenIatEntryCount;
+  support::ulittle32_t GuardLongJumpTargetTable;
+  support::ulittle32_t GuardLongJumpTargetCount;
+  support::ulittle32_t DynamicValueRelocTable;
+  support::ulittle32_t CHPEMetadataPointer;
+  support::ulittle32_t GuardRFFailureRoutine;
+  support::ulittle32_t GuardRFFailureRoutineFunctionPointer;
+  support::ulittle32_t DynamicValueRelocTableOffset;
+  support::ulittle16_t DynamicValueRelocTableSection;
+  support::ulittle16_t Reserved2;
+  support::ulittle32_t GuardRFVerifyStackPointerFunctionPointer;
+  support::ulittle32_t HotPatchTableOffset;
 };
 
+/// 64-bit load config (IMAGE_LOAD_CONFIG_DIRECTORY64)
 struct coff_load_configuration64 {
-  support::ulittle32_t Characteristics;
+  support::ulittle32_t Size;
   support::ulittle32_t TimeDateStamp;
   support::ulittle16_t MajorVersion;
   support::ulittle16_t MinorVersion;
   support::ulittle32_t GlobalFlagsClear;
   support::ulittle32_t GlobalFlagsSet;
   support::ulittle32_t CriticalSectionDefaultTimeout;
-  support::ulittle32_t DeCommitFreeBlockThreshold;
-  support::ulittle32_t DeCommitTotalFreeThreshold;
-  support::ulittle32_t LockPrefixTable;
-  support::ulittle32_t MaximumAllocationSize;
-  support::ulittle32_t VirtualMemoryThreshold;
-  support::ulittle32_t ProcessAffinityMask;
+  support::ulittle64_t DeCommitFreeBlockThreshold;
+  support::ulittle64_t DeCommitTotalFreeThreshold;
+  support::ulittle64_t LockPrefixTable;
+  support::ulittle64_t MaximumAllocationSize;
+  support::ulittle64_t VirtualMemoryThreshold;
+  support::ulittle64_t ProcessAffinityMask;
   support::ulittle32_t ProcessHeapFlags;
   support::ulittle16_t CSDVersion;
-  support::ulittle16_t Reserved;
-  support::ulittle32_t EditList;
+  support::ulittle16_t DependentLoadFlags;
+  support::ulittle64_t EditList;
   support::ulittle64_t SecurityCookie;
   support::ulittle64_t SEHandlerTable;
   support::ulittle64_t SEHandlerCount;
+
+  // Added in MSVC 2015 for /guard:cf.
+  support::ulittle64_t GuardCFCheckFunction;
+  support::ulittle64_t GuardCFCheckDispatch;
+  support::ulittle64_t GuardCFFunctionTable;
+  support::ulittle64_t GuardCFFunctionCount;
+  support::ulittle32_t GuardFlags;
+
+  // Added in MSVC 2017
+  coff_load_config_code_integrity CodeIntegrity;
+  support::ulittle64_t GuardAddressTakenIatEntryTable;
+  support::ulittle64_t GuardAddressTakenIatEntryCount;
+  support::ulittle64_t GuardLongJumpTargetTable;
+  support::ulittle64_t GuardLongJumpTargetCount;
+  support::ulittle64_t DynamicValueRelocTable;
+  support::ulittle64_t CHPEMetadataPointer;
+  support::ulittle64_t GuardRFFailureRoutine;
+  support::ulittle64_t GuardRFFailureRoutineFunctionPointer;
+  support::ulittle32_t DynamicValueRelocTableOffset;
+  support::ulittle16_t DynamicValueRelocTableSection;
+  support::ulittle16_t Reserved2;
+  support::ulittle64_t GuardRFVerifyStackPointerFunctionPointer;
+  support::ulittle32_t HotPatchTableOffset;
 };
 
 struct coff_runtime_function_x64 {
@@ -684,6 +749,8 @@ private:
   const coff_base_reloc_block_header *BaseRelocEnd;
   const debug_directory *DebugDirectoryBegin;
   const debug_directory *DebugDirectoryEnd;
+  // Either coff_load_configuration32 or coff_load_configuration64.
+  const void *LoadConfig;
 
   std::error_code getString(uint32_t offset, StringRef &Res) const;
 
@@ -698,6 +765,7 @@ private:
   std::error_code initExportTablePtr();
   std::error_code initBaseRelocPtr();
   std::error_code initDebugDirectoryPtr();
+  std::error_code initLoadConfigPtr();
 
 public:
   uintptr_t getSymbolTable() const {
@@ -775,6 +843,16 @@ public:
     return getRawNumberOfSymbols();
   }
 
+  const coff_load_configuration32 *getLoadConfig32() const {
+    assert(!is64());
+    return reinterpret_cast<const coff_load_configuration32 *>(LoadConfig);
+  }
+
+  const coff_load_configuration64 *getLoadConfig64() const {
+    assert(is64());
+    return reinterpret_cast<const coff_load_configuration64 *>(LoadConfig);
+  }
+
 protected:
   void moveSymbolNext(DataRefImpl &Symb) const override;
   Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;