tools/llvm-readobj/COFFDumper.cpp

   1 //===-- COFFDumper.cpp - COFF-specific dumper -------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 ///
  10 /// \file
  11 /// \brief This file implements the COFF-specific dumper for llvm-readobj.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "llvm-readobj.h"
  16 #include "Error.h"
  17 #include "ObjDumper.h"
  18 #include "StreamWriter.h"
  19 #include "llvm/ADT/DenseMap.h"
  20 #include "llvm/ADT/SmallString.h"
  21 #include "llvm/Object/COFF.h"
  22 #include "llvm/Object/ObjectFile.h"
  23 #include "llvm/Support/COFF.h"
  24 #include "llvm/Support/Casting.h"
  25 #include "llvm/Support/Compiler.h"
  26 #include "llvm/Support/DataExtractor.h"
  27 #include "llvm/Support/Format.h"
  28 #include "llvm/Support/SourceMgr.h"
  29 #include "llvm/Support/Win64EH.h"
  30 #include "llvm/Support/raw_ostream.h"
  31 #include "llvm/Support/system_error.h"
  32 #include <algorithm>
  33 #include <cstring>
  34 #include <time.h>
  35
  36 using namespace llvm;
  37 using namespace llvm::object;
  38 using namespace llvm::Win64EH;
  39
  40 namespace {
  41
  42 class COFFDumper : public ObjDumper {
  43 public:
  44   COFFDumper(const llvm::object::COFFObjectFile *Obj, StreamWriter& Writer)
  45     : ObjDumper(Writer)
  46     , Obj(Obj) {
  47     cacheRelocations();
  48   }
  49
  50   virtual void printFileHeaders() override;
  51   virtual void printSections() override;
  52   virtual void printRelocations() override;
  53   virtual void printSymbols() override;
  54   virtual void printDynamicSymbols() override;
  55   virtual void printUnwindInfo() override;
  56
  57 private:
  58   void printSymbol(const SymbolRef &Sym);
  59   void printRelocation(const SectionRef &Section, const RelocationRef &Reloc);
  60   void printDataDirectory(uint32_t Index, const std::string &FieldName);
  61   void printX64UnwindInfo();
  62
  63   template <class PEHeader> void printPEHeader(const PEHeader *Hdr);
  64   void printBaseOfDataField(const pe32_header *Hdr);
  65   void printBaseOfDataField(const pe32plus_header *Hdr);
  66
  67   void printRuntimeFunction(
  68     const RuntimeFunction& RTF,
  69     uint64_t OffsetInSection,
  70     const std::vector<RelocationRef> &Rels);
  71
  72   void printUnwindInfo(
  73     const Win64EH::UnwindInfo& UI,
  74     uint64_t OffsetInSection,
  75     const std::vector<RelocationRef> &Rels);
  76
  77   void printUnwindCode(const Win64EH::UnwindInfo &UI, ArrayRef<UnwindCode> UCs);
  78
  79   void printCodeViewLineTables(const SectionRef &Section);
  80
  81   void cacheRelocations();
  82
  83   error_code getSectionContents(
  84     const std::vector<RelocationRef> &Rels,
  85     uint64_t Offset,
  86     ArrayRef<uint8_t> &Contents,
  87     uint64_t &Addr);
  88
  89   error_code getSection(
  90     const std::vector<RelocationRef> &Rels,
  91     uint64_t Offset,
  92     const coff_section **Section,
  93     uint64_t *AddrPtr);
  94
  95   typedef DenseMap<const coff_section*, std::vector<RelocationRef> > RelocMapTy;
  96
  97   const llvm::object::COFFObjectFile *Obj;
  98   RelocMapTy RelocMap;
  99   std::vector<RelocationRef> EmptyRelocs;
 100 };
 101
 102 } // namespace
 103
 104
 105 namespace llvm {
 106
 107 error_code createCOFFDumper(const object::ObjectFile *Obj, StreamWriter &Writer,
 108                             std::unique_ptr<ObjDumper> &Result) {
 109   const COFFObjectFile *COFFObj = dyn_cast<COFFObjectFile>(Obj);
 110   if (!COFFObj)
 111     return readobj_error::unsupported_obj_file_format;
 112
 113   Result.reset(new COFFDumper(COFFObj, Writer));
 114   return readobj_error::success;
 115 }
 116
 117 } // namespace llvm
 118
 119
 120 // Returns the name of the unwind code.
 121 static StringRef getUnwindCodeTypeName(uint8_t Code) {
 122   switch(Code) {
 123   default: llvm_unreachable("Invalid unwind code");
 124   case UOP_PushNonVol: return "PUSH_NONVOL";
 125   case UOP_AllocLarge: return "ALLOC_LARGE";
 126   case UOP_AllocSmall: return "ALLOC_SMALL";
 127   case UOP_SetFPReg: return "SET_FPREG";
 128   case UOP_SaveNonVol: return "SAVE_NONVOL";
 129   case UOP_SaveNonVolBig: return "SAVE_NONVOL_FAR";
 130   case UOP_SaveXMM128: return "SAVE_XMM128";
 131   case UOP_SaveXMM128Big: return "SAVE_XMM128_FAR";
 132   case UOP_PushMachFrame: return "PUSH_MACHFRAME";
 133   }
 134 }
 135
 136 // Returns the name of a referenced register.
 137 static StringRef getUnwindRegisterName(uint8_t Reg) {
 138   switch(Reg) {
 139   default: llvm_unreachable("Invalid register");
 140   case 0: return "RAX";
 141   case 1: return "RCX";
 142   case 2: return "RDX";
 143   case 3: return "RBX";
 144   case 4: return "RSP";
 145   case 5: return "RBP";
 146   case 6: return "RSI";
 147   case 7: return "RDI";
 148   case 8: return "R8";
 149   case 9: return "R9";
 150   case 10: return "R10";
 151   case 11: return "R11";
 152   case 12: return "R12";
 153   case 13: return "R13";
 154   case 14: return "R14";
 155   case 15: return "R15";
 156   }
 157 }
 158
 159 // Calculates the number of array slots required for the unwind code.
 160 static unsigned getNumUsedSlots(const UnwindCode &UnwindCode) {
 161   switch (UnwindCode.getUnwindOp()) {
 162   default: llvm_unreachable("Invalid unwind code");
 163   case UOP_PushNonVol:
 164   case UOP_AllocSmall:
 165   case UOP_SetFPReg:
 166   case UOP_PushMachFrame:
 167     return 1;
 168   case UOP_SaveNonVol:
 169   case UOP_SaveXMM128:
 170     return 2;
 171   case UOP_SaveNonVolBig:
 172   case UOP_SaveXMM128Big:
 173     return 3;
 174   case UOP_AllocLarge:
 175     return (UnwindCode.getOpInfo() == 0) ? 2 : 3;
 176   }
 177 }
 178
 179 // Given a symbol sym this functions returns the address and section of it.
 180 static error_code resolveSectionAndAddress(const COFFObjectFile *Obj,
 181                                            const SymbolRef &Sym,
 182                                            const coff_section *&ResolvedSection,
 183                                            uint64_t &ResolvedAddr) {
 184   if (error_code EC = Sym.getAddress(ResolvedAddr))
 185     return EC;
 186
 187   section_iterator iter(Obj->section_begin());
 188   if (error_code EC = Sym.getSection(iter))
 189     return EC;
 190
 191   ResolvedSection = Obj->getCOFFSection(*iter);
 192   return object_error::success;
 193 }
 194
 195 // Given a vector of relocations for a section and an offset into this section
 196 // the function returns the symbol used for the relocation at the offset.
 197 static error_code resolveSymbol(const std::vector<RelocationRef> &Rels,
 198                                 uint64_t Offset, SymbolRef &Sym) {
 199   for (std::vector<RelocationRef>::const_iterator RelI = Rels.begin(),
 200                                                   RelE = Rels.end();
 201                                                   RelI != RelE; ++RelI) {
 202     uint64_t Ofs;
 203     if (error_code EC = RelI->getOffset(Ofs))
 204       return EC;
 205
 206     if (Ofs == Offset) {
 207       Sym = *RelI->getSymbol();
 208       return readobj_error::success;
 209     }
 210   }
 211
 212   return readobj_error::unknown_symbol;
 213 }
 214
 215 // Given a vector of relocations for a section and an offset into this section
 216 // the function returns the name of the symbol used for the relocation at the
 217 // offset.
 218 static error_code resolveSymbolName(const std::vector<RelocationRef> &Rels,
 219                                     uint64_t Offset, StringRef &Name) {
 220   SymbolRef Sym;
 221   if (error_code EC = resolveSymbol(Rels, Offset, Sym)) return EC;
 222   if (error_code EC = Sym.getName(Name)) return EC;
 223   return object_error::success;
 224 }
 225
 226 static const EnumEntry<COFF::MachineTypes> ImageFileMachineType[] = {
 227   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_UNKNOWN  ),
 228   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_AM33     ),
 229   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_AMD64    ),
 230   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_ARM      ),
 231   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_ARMNT    ),
 232   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_EBC      ),
 233   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_I386     ),
 234   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_IA64     ),
 235   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_M32R     ),
 236   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_MIPS16   ),
 237   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_MIPSFPU  ),
 238   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_MIPSFPU16),
 239   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_POWERPC  ),
 240   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_POWERPCFP),
 241   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_R4000    ),
 242   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_SH3      ),
 243   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_SH3DSP   ),
 244   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_SH4      ),
 245   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_SH5      ),
 246   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_THUMB    ),
 247   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_MACHINE_WCEMIPSV2)
 248 };
 249
 250 static const EnumEntry<COFF::Characteristics> ImageFileCharacteristics[] = {
 251   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_RELOCS_STRIPPED        ),
 252   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_EXECUTABLE_IMAGE       ),
 253   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_LINE_NUMS_STRIPPED     ),
 254   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_LOCAL_SYMS_STRIPPED    ),
 255   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_AGGRESSIVE_WS_TRIM     ),
 256   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_LARGE_ADDRESS_AWARE    ),
 257   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_BYTES_REVERSED_LO      ),
 258   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_32BIT_MACHINE          ),
 259   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_DEBUG_STRIPPED         ),
 260   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP),
 261   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_NET_RUN_FROM_SWAP      ),
 262   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_SYSTEM                 ),
 263   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_DLL                    ),
 264   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_UP_SYSTEM_ONLY         ),
 265   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_BYTES_REVERSED_HI      )
 266 };
 267
 268 static const EnumEntry<COFF::WindowsSubsystem> PEWindowsSubsystem[] = {
 269   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_UNKNOWN                ),
 270   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_NATIVE                 ),
 271   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_WINDOWS_GUI            ),
 272   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_WINDOWS_CUI            ),
 273   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_POSIX_CUI              ),
 274   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_WINDOWS_CE_GUI         ),
 275   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_EFI_APPLICATION        ),
 276   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER),
 277   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER     ),
 278   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_EFI_ROM                ),
 279   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_XBOX                   ),
 280 };
 281
 282 static const EnumEntry<COFF::DLLCharacteristics> PEDLLCharacteristics[] = {
 283   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_HIGH_ENTROPY_VA      ),
 284   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE         ),
 285   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY      ),
 286   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_NX_COMPAT            ),
 287   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_NO_ISOLATION         ),
 288   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_NO_SEH               ),
 289   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_NO_BIND              ),
 290   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_WDM_DRIVER           ),
 291   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE),
 292 };
 293
 294 static const EnumEntry<COFF::SectionCharacteristics>
 295 ImageSectionCharacteristics[] = {
 296   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_TYPE_NO_PAD           ),
 297   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_CNT_CODE              ),
 298   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_CNT_INITIALIZED_DATA  ),
 299   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_CNT_UNINITIALIZED_DATA),
 300   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_LNK_OTHER             ),
 301   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_LNK_INFO              ),
 302   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_LNK_REMOVE            ),
 303   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_LNK_COMDAT            ),
 304   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_GPREL                 ),
 305   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_PURGEABLE         ),
 306   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_16BIT             ),
 307   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_LOCKED            ),
 308   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_PRELOAD           ),
 309   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_1BYTES          ),
 310   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_2BYTES          ),
 311   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_4BYTES          ),
 312   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_8BYTES          ),
 313   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_16BYTES         ),
 314   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_32BYTES         ),
 315   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_64BYTES         ),
 316   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_128BYTES        ),
 317   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_256BYTES        ),
 318   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_512BYTES        ),
 319   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_1024BYTES       ),
 320   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_2048BYTES       ),
 321   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_4096BYTES       ),
 322   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_8192BYTES       ),
 323   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_LNK_NRELOC_OVFL       ),
 324   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_DISCARDABLE       ),
 325   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_NOT_CACHED        ),
 326   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_NOT_PAGED         ),
 327   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_SHARED            ),
 328   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_EXECUTE           ),
 329   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_READ              ),
 330   LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_MEM_WRITE             )
 331 };
 332
 333 static const EnumEntry<COFF::SymbolBaseType> ImageSymType[] = {
 334   { "Null"  , COFF::IMAGE_SYM_TYPE_NULL   },
 335   { "Void"  , COFF::IMAGE_SYM_TYPE_VOID   },
 336   { "Char"  , COFF::IMAGE_SYM_TYPE_CHAR   },
 337   { "Short" , COFF::IMAGE_SYM_TYPE_SHORT  },
 338   { "Int"   , COFF::IMAGE_SYM_TYPE_INT    },
 339   { "Long"  , COFF::IMAGE_SYM_TYPE_LONG   },
 340   { "Float" , COFF::IMAGE_SYM_TYPE_FLOAT  },
 341   { "Double", COFF::IMAGE_SYM_TYPE_DOUBLE },
 342   { "Struct", COFF::IMAGE_SYM_TYPE_STRUCT },
 343   { "Union" , COFF::IMAGE_SYM_TYPE_UNION  },
 344   { "Enum"  , COFF::IMAGE_SYM_TYPE_ENUM   },
 345   { "MOE"   , COFF::IMAGE_SYM_TYPE_MOE    },
 346   { "Byte"  , COFF::IMAGE_SYM_TYPE_BYTE   },
 347   { "Word"  , COFF::IMAGE_SYM_TYPE_WORD   },
 348   { "UInt"  , COFF::IMAGE_SYM_TYPE_UINT   },
 349   { "DWord" , COFF::IMAGE_SYM_TYPE_DWORD  }
 350 };
 351
 352 static const EnumEntry<COFF::SymbolComplexType> ImageSymDType[] = {
 353   { "Null"    , COFF::IMAGE_SYM_DTYPE_NULL     },
 354   { "Pointer" , COFF::IMAGE_SYM_DTYPE_POINTER  },
 355   { "Function", COFF::IMAGE_SYM_DTYPE_FUNCTION },
 356   { "Array"   , COFF::IMAGE_SYM_DTYPE_ARRAY    }
 357 };
 358
 359 static const EnumEntry<COFF::SymbolStorageClass> ImageSymClass[] = {
 360   { "EndOfFunction"  , COFF::IMAGE_SYM_CLASS_END_OF_FUNCTION  },
 361   { "Null"           , COFF::IMAGE_SYM_CLASS_NULL             },
 362   { "Automatic"      , COFF::IMAGE_SYM_CLASS_AUTOMATIC        },
 363   { "External"       , COFF::IMAGE_SYM_CLASS_EXTERNAL         },
 364   { "Static"         , COFF::IMAGE_SYM_CLASS_STATIC           },
 365   { "Register"       , COFF::IMAGE_SYM_CLASS_REGISTER         },
 366   { "ExternalDef"    , COFF::IMAGE_SYM_CLASS_EXTERNAL_DEF     },
 367   { "Label"          , COFF::IMAGE_SYM_CLASS_LABEL            },
 368   { "UndefinedLabel" , COFF::IMAGE_SYM_CLASS_UNDEFINED_LABEL  },
 369   { "MemberOfStruct" , COFF::IMAGE_SYM_CLASS_MEMBER_OF_STRUCT },
 370   { "Argument"       , COFF::IMAGE_SYM_CLASS_ARGUMENT         },
 371   { "StructTag"      , COFF::IMAGE_SYM_CLASS_STRUCT_TAG       },
 372   { "MemberOfUnion"  , COFF::IMAGE_SYM_CLASS_MEMBER_OF_UNION  },
 373   { "UnionTag"       , COFF::IMAGE_SYM_CLASS_UNION_TAG        },
 374   { "TypeDefinition" , COFF::IMAGE_SYM_CLASS_TYPE_DEFINITION  },
 375   { "UndefinedStatic", COFF::IMAGE_SYM_CLASS_UNDEFINED_STATIC },
 376   { "EnumTag"        , COFF::IMAGE_SYM_CLASS_ENUM_TAG         },
 377   { "MemberOfEnum"   , COFF::IMAGE_SYM_CLASS_MEMBER_OF_ENUM   },
 378   { "RegisterParam"  , COFF::IMAGE_SYM_CLASS_REGISTER_PARAM   },
 379   { "BitField"       , COFF::IMAGE_SYM_CLASS_BIT_FIELD        },
 380   { "Block"          , COFF::IMAGE_SYM_CLASS_BLOCK            },
 381   { "Function"       , COFF::IMAGE_SYM_CLASS_FUNCTION         },
 382   { "EndOfStruct"    , COFF::IMAGE_SYM_CLASS_END_OF_STRUCT    },
 383   { "File"           , COFF::IMAGE_SYM_CLASS_FILE             },
 384   { "Section"        , COFF::IMAGE_SYM_CLASS_SECTION          },
 385   { "WeakExternal"   , COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL    },
 386   { "CLRToken"       , COFF::IMAGE_SYM_CLASS_CLR_TOKEN        }
 387 };
 388
 389 static const EnumEntry<COFF::COMDATType> ImageCOMDATSelect[] = {
 390   { "NoDuplicates", COFF::IMAGE_COMDAT_SELECT_NODUPLICATES },
 391   { "Any"         , COFF::IMAGE_COMDAT_SELECT_ANY          },
 392   { "SameSize"    , COFF::IMAGE_COMDAT_SELECT_SAME_SIZE    },
 393   { "ExactMatch"  , COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH  },
 394   { "Associative" , COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE  },
 395   { "Largest"     , COFF::IMAGE_COMDAT_SELECT_LARGEST      },
 396   { "Newest"      , COFF::IMAGE_COMDAT_SELECT_NEWEST       }
 397 };
 398
 399 static const EnumEntry<COFF::WeakExternalCharacteristics>
 400 WeakExternalCharacteristics[] = {
 401   { "NoLibrary", COFF::IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY },
 402   { "Library"  , COFF::IMAGE_WEAK_EXTERN_SEARCH_LIBRARY   },
 403   { "Alias"    , COFF::IMAGE_WEAK_EXTERN_SEARCH_ALIAS     }
 404 };
 405
 406 static const EnumEntry<unsigned> UnwindFlags[] = {
 407   { "ExceptionHandler", Win64EH::UNW_ExceptionHandler },
 408   { "TerminateHandler", Win64EH::UNW_TerminateHandler },
 409   { "ChainInfo"       , Win64EH::UNW_ChainInfo        }
 410 };
 411
 412 static const EnumEntry<unsigned> UnwindOpInfo[] = {
 413   { "RAX",  0 },
 414   { "RCX",  1 },
 415   { "RDX",  2 },
 416   { "RBX",  3 },
 417   { "RSP",  4 },
 418   { "RBP",  5 },
 419   { "RSI",  6 },
 420   { "RDI",  7 },
 421   { "R8",   8 },
 422   { "R9",   9 },
 423   { "R10", 10 },
 424   { "R11", 11 },
 425   { "R12", 12 },
 426   { "R13", 13 },
 427   { "R14", 14 },
 428   { "R15", 15 }
 429 };
 430
 431 // Some additional COFF structures not defined by llvm::object.
 432 namespace {
 433   struct coff_aux_file_record {
 434     char FileName[18];
 435   };
 436 } // namespace
 437
 438 static uint64_t getOffsetOfLSDA(const Win64EH::UnwindInfo& UI) {
 439   return static_cast<const char*>(UI.getLanguageSpecificData())
 440          - reinterpret_cast<const char*>(&UI);
 441 }
 442
 443 static uint32_t getLargeSlotValue(ArrayRef<UnwindCode> UCs) {
 444   if (UCs.size() < 3)
 445     return 0;
 446
 447   return UCs[1].FrameOffset + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16);
 448 }
 449
 450 template<typename T>
 451 static error_code getSymbolAuxData(const COFFObjectFile *Obj,
 452                                    const coff_symbol *Symbol, const T* &Aux) {
 453   ArrayRef<uint8_t> AuxData = Obj->getSymbolAuxData(Symbol);
 454   Aux = reinterpret_cast<const T*>(AuxData.data());
 455   return readobj_error::success;
 456 }
 457
 458 static std::string formatSymbol(const std::vector<RelocationRef> &Rels,
 459                                 uint64_t Offset, uint32_t Disp) {
 460   std::string Buffer;
 461   raw_string_ostream Str(Buffer);
 462
 463   StringRef Sym;
 464   if (resolveSymbolName(Rels, Offset, Sym)) {
 465     Str << format(" (0x%" PRIX64 ")", Offset);
 466     return Str.str();
 467   }
 468
 469   Str << Sym;
 470   if (Disp > 0) {
 471     Str << format(" +0x%X (0x%" PRIX64 ")", Disp, Offset);
 472   } else {
 473     Str << format(" (0x%" PRIX64 ")", Offset);
 474   }
 475
 476   return Str.str();
 477 }
 478
 479 // Given a vector of relocations for a section and an offset into this section
 480 // the function resolves the symbol used for the relocation at the offset and
 481 // returns the section content and the address inside the content pointed to
 482 // by the symbol.
 483 error_code COFFDumper::getSectionContents(
 484     const std::vector<RelocationRef> &Rels, uint64_t Offset,
 485     ArrayRef<uint8_t> &Contents, uint64_t &Addr) {
 486
 487   SymbolRef Sym;
 488   const coff_section *Section;
 489
 490   if (error_code EC = resolveSymbol(Rels, Offset, Sym))
 491     return EC;
 492   if (error_code EC = resolveSectionAndAddress(Obj, Sym, Section, Addr))
 493     return EC;
 494   if (error_code EC = Obj->getSectionContents(Section, Contents))
 495     return EC;
 496
 497   return object_error::success;
 498 }
 499
 500 error_code COFFDumper::getSection(
 501     const std::vector<RelocationRef> &Rels, uint64_t Offset,
 502     const coff_section **SectionPtr, uint64_t *AddrPtr) {
 503
 504   SymbolRef Sym;
 505   if (error_code EC = resolveSymbol(Rels, Offset, Sym))
 506     return EC;
 507
 508   const coff_section *Section;
 509   uint64_t Addr;
 510   if (error_code EC = resolveSectionAndAddress(Obj, Sym, Section, Addr))
 511     return EC;
 512
 513   if (SectionPtr)
 514     *SectionPtr = Section;
 515   if (AddrPtr)
 516     *AddrPtr = Addr;
 517
 518   return object_error::success;
 519 }
 520
 521 void COFFDumper::cacheRelocations() {
 522   for (const SectionRef &S : Obj->sections()) {
 523     const coff_section *Section = Obj->getCOFFSection(S);
 524
 525     for (const RelocationRef &Reloc : S.relocations())
 526       RelocMap[Section].push_back(Reloc);
 527
 528     // Sort relocations by address.
 529     std::sort(RelocMap[Section].begin(), RelocMap[Section].end(),
 530               relocAddressLess);
 531   }
 532 }
 533
 534 void COFFDumper::printDataDirectory(uint32_t Index, const std::string &FieldName) {
 535   const data_directory *Data;
 536   if (Obj->getDataDirectory(Index, Data))
 537     return;
 538   W.printHex(FieldName + "RVA", Data->RelativeVirtualAddress);
 539   W.printHex(FieldName + "Size", Data->Size);
 540 }
 541
 542 void COFFDumper::printFileHeaders() {
 543   // Print COFF header
 544   const coff_file_header *COFFHeader = 0;
 545   if (error(Obj->getCOFFHeader(COFFHeader)))
 546     return;
 547
 548   time_t TDS = COFFHeader->TimeDateStamp;
 549   char FormattedTime[20] = { };
 550   strftime(FormattedTime, 20, "%Y-%m-%d %H:%M:%S", gmtime(&TDS));
 551
 552   {
 553     DictScope D(W, "ImageFileHeader");
 554     W.printEnum  ("Machine", COFFHeader->Machine,
 555                     makeArrayRef(ImageFileMachineType));
 556     W.printNumber("SectionCount", COFFHeader->NumberOfSections);
 557     W.printHex   ("TimeDateStamp", FormattedTime, COFFHeader->TimeDateStamp);
 558     W.printHex   ("PointerToSymbolTable", COFFHeader->PointerToSymbolTable);
 559     W.printNumber("SymbolCount", COFFHeader->NumberOfSymbols);
 560     W.printNumber("OptionalHeaderSize", COFFHeader->SizeOfOptionalHeader);
 561     W.printFlags ("Characteristics", COFFHeader->Characteristics,
 562                     makeArrayRef(ImageFileCharacteristics));
 563   }
 564
 565   // Print PE header. This header does not exist if this is an object file and
 566   // not an executable.
 567   const pe32_header *PEHeader = 0;
 568   if (error(Obj->getPE32Header(PEHeader)))
 569     return;
 570   if (PEHeader)
 571     printPEHeader<pe32_header>(PEHeader);
 572
 573   const pe32plus_header *PEPlusHeader = 0;
 574   if (error(Obj->getPE32PlusHeader(PEPlusHeader)))
 575     return;
 576   if (PEPlusHeader)
 577     printPEHeader<pe32plus_header>(PEPlusHeader);
 578 }
 579
 580 template <class PEHeader>
 581 void COFFDumper::printPEHeader(const PEHeader *Hdr) {
 582   DictScope D(W, "ImageOptionalHeader");
 583   W.printNumber("MajorLinkerVersion", Hdr->MajorLinkerVersion);
 584   W.printNumber("MinorLinkerVersion", Hdr->MinorLinkerVersion);
 585   W.printNumber("SizeOfCode", Hdr->SizeOfCode);
 586   W.printNumber("SizeOfInitializedData", Hdr->SizeOfInitializedData);
 587   W.printNumber("SizeOfUninitializedData", Hdr->SizeOfUninitializedData);
 588   W.printHex   ("AddressOfEntryPoint", Hdr->AddressOfEntryPoint);
 589   W.printHex   ("BaseOfCode", Hdr->BaseOfCode);
 590   printBaseOfDataField(Hdr);
 591   W.printHex   ("ImageBase", Hdr->ImageBase);
 592   W.printNumber("SectionAlignment", Hdr->SectionAlignment);
 593   W.printNumber("FileAlignment", Hdr->FileAlignment);
 594   W.printNumber("MajorOperatingSystemVersion",
 595                 Hdr->MajorOperatingSystemVersion);
 596   W.printNumber("MinorOperatingSystemVersion",
 597                 Hdr->MinorOperatingSystemVersion);
 598   W.printNumber("MajorImageVersion", Hdr->MajorImageVersion);
 599   W.printNumber("MinorImageVersion", Hdr->MinorImageVersion);
 600   W.printNumber("MajorSubsystemVersion", Hdr->MajorSubsystemVersion);
 601   W.printNumber("MinorSubsystemVersion", Hdr->MinorSubsystemVersion);
 602   W.printNumber("SizeOfImage", Hdr->SizeOfImage);
 603   W.printNumber("SizeOfHeaders", Hdr->SizeOfHeaders);
 604   W.printEnum  ("Subsystem", Hdr->Subsystem, makeArrayRef(PEWindowsSubsystem));
 605   W.printFlags ("Subsystem", Hdr->DLLCharacteristics,
 606                 makeArrayRef(PEDLLCharacteristics));
 607   W.printNumber("SizeOfStackReserve", Hdr->SizeOfStackReserve);
 608   W.printNumber("SizeOfStackCommit", Hdr->SizeOfStackCommit);
 609   W.printNumber("SizeOfHeapReserve", Hdr->SizeOfHeapReserve);
 610   W.printNumber("SizeOfHeapCommit", Hdr->SizeOfHeapCommit);
 611   W.printNumber("NumberOfRvaAndSize", Hdr->NumberOfRvaAndSize);
 612
 613   if (Hdr->NumberOfRvaAndSize > 0) {
 614     DictScope D(W, "DataDirectory");
 615     static const char * const directory[] = {
 616       "ExportTable", "ImportTable", "ResourceTable", "ExceptionTable",
 617       "CertificateTable", "BaseRelocationTable", "Debug", "Architecture",
 618       "GlobalPtr", "TLSTable", "LoadConfigTable", "BoundImport", "IAT",
 619       "DelayImportDescriptor", "CLRRuntimeHeader", "Reserved"
 620     };
 621
 622     for (uint32_t i = 0; i < Hdr->NumberOfRvaAndSize; ++i) {
 623       printDataDirectory(i, directory[i]);
 624     }
 625   }
 626 }
 627
 628 void COFFDumper::printBaseOfDataField(const pe32_header *Hdr) {
 629   W.printHex("BaseOfData", Hdr->BaseOfData);
 630 }
 631
 632 void COFFDumper::printBaseOfDataField(const pe32plus_header *) {}
 633
 634 void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
 635   StringRef Data;
 636   if (error(Section.getContents(Data)))
 637     return;
 638
 639   SmallVector<StringRef, 10> FunctionNames;
 640   StringMap<StringRef> FunctionLineTables;
 641   StringRef FileIndexToStringOffsetTable;
 642   StringRef StringTable;
 643
 644   ListScope D(W, "CodeViewLineTables");
 645   {
 646     DataExtractor DE(Data, true, 4);
 647     uint32_t Offset = 0,
 648              Magic = DE.getU32(&Offset);
 649     W.printHex("Magic", Magic);
 650     if (Magic != COFF::DEBUG_SECTION_MAGIC) {
 651       error(object_error::parse_failed);
 652       return;
 653     }
 654
 655     bool Finished = false;
 656     while (DE.isValidOffset(Offset) && !Finished) {
 657       // The section consists of a number of subsection in the following format:
 658       // |Type|PayloadSize|Payload...|
 659       uint32_t SubSectionType = DE.getU32(&Offset),
 660                PayloadSize = DE.getU32(&Offset);
 661       ListScope S(W, "Subsection");
 662       W.printHex("Type", SubSectionType);
 663       W.printHex("PayloadSize", PayloadSize);
 664       if (PayloadSize > Data.size() - Offset) {
 665         error(object_error::parse_failed);
 666         return;
 667       }
 668
 669       // Print the raw contents to simplify debugging if anything goes wrong
 670       // afterwards.
 671       StringRef Contents = Data.substr(Offset, PayloadSize);
 672       W.printBinaryBlock("Contents", Contents);
 673
 674       switch (SubSectionType) {
 675       case COFF::DEBUG_LINE_TABLE_SUBSECTION: {
 676         // Holds a PC to file:line table.  Some data to parse this subsection is
 677         // stored in the other subsections, so just check sanity and store the
 678         // pointers for deferred processing.
 679
 680         if (PayloadSize < 12) {
 681           // There should be at least three words to store two function
 682           // relocations and size of the code.
 683           error(object_error::parse_failed);
 684           return;
 685         }
 686
 687         StringRef FunctionName;
 688         if (error(resolveSymbolName(RelocMap[Obj->getCOFFSection(Section)],
 689                                     Offset, FunctionName)))
 690           return;
 691         W.printString("FunctionName", FunctionName);
 692         if (FunctionLineTables.count(FunctionName) != 0) {
 693           // Saw debug info for this function already?
 694           error(object_error::parse_failed);
 695           return;
 696         }
 697
 698         FunctionLineTables[FunctionName] = Contents;
 699         FunctionNames.push_back(FunctionName);
 700         break;
 701       }
 702       case COFF::DEBUG_STRING_TABLE_SUBSECTION:
 703         if (PayloadSize == 0 || StringTable.data() != 0 ||
 704             Contents.back() != '\0') {
 705           // Empty or duplicate or non-null-terminated subsection.
 706           error(object_error::parse_failed);
 707           return;
 708         }
 709         StringTable = Contents;
 710         break;
 711       case COFF::DEBUG_INDEX_SUBSECTION:
 712         // Holds the translation table from file indices
 713         // to offsets in the string table.
 714
 715         if (PayloadSize == 0 || FileIndexToStringOffsetTable.data() != 0) {
 716           // Empty or duplicate subsection.
 717           error(object_error::parse_failed);
 718           return;
 719         }
 720         FileIndexToStringOffsetTable = Contents;
 721         break;
 722       }
 723       Offset += PayloadSize;
 724
 725       // Align the reading pointer by 4.
 726       Offset += (-Offset) % 4;
 727     }
 728   }
 729
 730   // Dump the line tables now that we've read all the subsections and know all
 731   // the required information.
 732   for (unsigned I = 0, E = FunctionNames.size(); I != E; ++I) {
 733     StringRef Name = FunctionNames[I];
 734     ListScope S(W, "FunctionLineTable");
 735     W.printString("FunctionName", Name);
 736
 737     DataExtractor DE(FunctionLineTables[Name], true, 4);
 738     uint32_t Offset = 8;  // Skip relocations.
 739     uint32_t FunctionSize = DE.getU32(&Offset);
 740     W.printHex("CodeSize", FunctionSize);
 741     while (DE.isValidOffset(Offset)) {
 742       // For each range of lines with the same filename, we have a segment
 743       // in the line table.  The filename string is accessed using double
 744       // indirection to the string table subsection using the index subsection.
 745       uint32_t OffsetInIndex = DE.getU32(&Offset),
 746                SegmentLength   = DE.getU32(&Offset),
 747                FullSegmentSize = DE.getU32(&Offset);
 748       if (FullSegmentSize != 12 + 8 * SegmentLength) {
 749         error(object_error::parse_failed);
 750         return;
 751       }
 752
 753       uint32_t FilenameOffset;
 754       {
 755         DataExtractor SDE(FileIndexToStringOffsetTable, true, 4);
 756         uint32_t OffsetInSDE = OffsetInIndex;
 757         if (!SDE.isValidOffset(OffsetInSDE)) {
 758           error(object_error::parse_failed);
 759           return;
 760         }
 761         FilenameOffset = SDE.getU32(&OffsetInSDE);
 762       }
 763
 764       if (FilenameOffset == 0 || FilenameOffset + 1 >= StringTable.size() ||
 765           StringTable.data()[FilenameOffset - 1] != '\0') {
 766         // Each string in an F3 subsection should be preceded by a null
 767         // character.
 768         error(object_error::parse_failed);
 769         return;
 770       }
 771
 772       StringRef Filename(StringTable.data() + FilenameOffset);
 773       ListScope S(W, "FilenameSegment");
 774       W.printString("Filename", Filename);
 775       for (unsigned J = 0; J != SegmentLength && DE.isValidOffset(Offset);
 776            ++J) {
 777         // Then go the (PC, LineNumber) pairs.  The line number is stored in the
 778         // least significant 31 bits of the respective word in the table.
 779         uint32_t PC = DE.getU32(&Offset),
 780                  LineNumber = DE.getU32(&Offset) & 0x7fffffff;
 781         if (PC >= FunctionSize) {
 782           error(object_error::parse_failed);
 783           return;
 784         }
 785         char Buffer[32];
 786         format("+0x%X", PC).snprint(Buffer, 32);
 787         W.printNumber(Buffer, LineNumber);
 788       }
 789     }
 790   }
 791 }
 792
 793 void COFFDumper::printSections() {
 794   ListScope SectionsD(W, "Sections");
 795   int SectionNumber = 0;
 796   for (const SectionRef &Sec : Obj->sections()) {
 797     ++SectionNumber;
 798     const coff_section *Section = Obj->getCOFFSection(Sec);
 799
 800     StringRef Name;
 801     if (error(Sec.getName(Name)))
 802       Name = "";
 803
 804     DictScope D(W, "Section");
 805     W.printNumber("Number", SectionNumber);
 806     W.printBinary("Name", Name, Section->Name);
 807     W.printHex   ("VirtualSize", Section->VirtualSize);
 808     W.printHex   ("VirtualAddress", Section->VirtualAddress);
 809     W.printNumber("RawDataSize", Section->SizeOfRawData);
 810     W.printHex   ("PointerToRawData", Section->PointerToRawData);
 811     W.printHex   ("PointerToRelocations", Section->PointerToRelocations);
 812     W.printHex   ("PointerToLineNumbers", Section->PointerToLinenumbers);
 813     W.printNumber("RelocationCount", Section->NumberOfRelocations);
 814     W.printNumber("LineNumberCount", Section->NumberOfLinenumbers);
 815     W.printFlags ("Characteristics", Section->Characteristics,
 816                     makeArrayRef(ImageSectionCharacteristics),
 817                     COFF::SectionCharacteristics(0x00F00000));
 818
 819     if (opts::SectionRelocations) {
 820       ListScope D(W, "Relocations");
 821       for (const RelocationRef &Reloc : Sec.relocations())
 822         printRelocation(Sec, Reloc);
 823     }
 824
 825     if (opts::SectionSymbols) {
 826       ListScope D(W, "Symbols");
 827       for (const SymbolRef &Symbol : Obj->symbols()) {
 828         bool Contained = false;
 829         if (Sec.containsSymbol(Symbol, Contained) || !Contained)
 830           continue;
 831
 832         printSymbol(Symbol);
 833       }
 834     }
 835
 836     if (Name == ".debug$S" && opts::CodeViewLineTables)
 837       printCodeViewLineTables(Sec);
 838
 839     if (opts::SectionData) {
 840       StringRef Data;
 841       if (error(Sec.getContents(Data)))
 842         break;
 843
 844       W.printBinaryBlock("SectionData", Data);
 845     }
 846   }
 847 }
 848
 849 void COFFDumper::printRelocations() {
 850   ListScope D(W, "Relocations");
 851
 852   int SectionNumber = 0;
 853   for (const SectionRef &Section : Obj->sections()) {
 854     ++SectionNumber;
 855     StringRef Name;
 856     if (error(Section.getName(Name)))
 857       continue;
 858
 859     bool PrintedGroup = false;
 860     for (const RelocationRef &Reloc : Section.relocations()) {
 861       if (!PrintedGroup) {
 862         W.startLine() << "Section (" << SectionNumber << ") " << Name << " {\n";
 863         W.indent();
 864         PrintedGroup = true;
 865       }
 866
 867       printRelocation(Section, Reloc);
 868     }
 869
 870     if (PrintedGroup) {
 871       W.unindent();
 872       W.startLine() << "}\n";
 873     }
 874   }
 875 }
 876
 877 void COFFDumper::printRelocation(const SectionRef &Section,
 878                                  const RelocationRef &Reloc) {
 879   uint64_t Offset;
 880   uint64_t RelocType;
 881   SmallString<32> RelocName;
 882   StringRef SymbolName;
 883   StringRef Contents;
 884   if (error(Reloc.getOffset(Offset)))
 885     return;
 886   if (error(Reloc.getType(RelocType)))
 887     return;
 888   if (error(Reloc.getTypeName(RelocName)))
 889     return;
 890   symbol_iterator Symbol = Reloc.getSymbol();
 891   if (error(Symbol->getName(SymbolName)))
 892     return;
 893   if (error(Section.getContents(Contents)))
 894     return;
 895
 896   if (opts::ExpandRelocs) {
 897     DictScope Group(W, "Relocation");
 898     W.printHex("Offset", Offset);
 899     W.printNumber("Type", RelocName, RelocType);
 900     W.printString("Symbol", SymbolName.size() > 0 ? SymbolName : "-");
 901   } else {
 902     raw_ostream& OS = W.startLine();
 903     OS << W.hex(Offset)
 904        << " " << RelocName
 905        << " " << (SymbolName.size() > 0 ? SymbolName : "-")
 906        << "\n";
 907   }
 908 }
 909
 910 void COFFDumper::printSymbols() {
 911   ListScope Group(W, "Symbols");
 912
 913   for (const SymbolRef &Symbol : Obj->symbols())
 914     printSymbol(Symbol);
 915 }
 916
 917 void COFFDumper::printDynamicSymbols() { ListScope Group(W, "DynamicSymbols"); }
 918
 919 void COFFDumper::printSymbol(const SymbolRef &Sym) {
 920   DictScope D(W, "Symbol");
 921
 922   const coff_symbol *Symbol = Obj->getCOFFSymbol(Sym);
 923   const coff_section *Section;
 924   if (error_code EC = Obj->getSection(Symbol->SectionNumber, Section)) {
 925     W.startLine() << "Invalid section number: " << EC.message() << "\n";
 926     W.flush();
 927     return;
 928   }
 929
 930   StringRef SymbolName;
 931   if (Obj->getSymbolName(Symbol, SymbolName))
 932     SymbolName = "";
 933
 934   StringRef SectionName = "";
 935   if (Section)
 936     Obj->getSectionName(Section, SectionName);
 937
 938   W.printString("Name", SymbolName);
 939   W.printNumber("Value", Symbol->Value);
 940   W.printNumber("Section", SectionName, Symbol->SectionNumber);
 941   W.printEnum  ("BaseType", Symbol->getBaseType(), makeArrayRef(ImageSymType));
 942   W.printEnum  ("ComplexType", Symbol->getComplexType(),
 943                                                    makeArrayRef(ImageSymDType));
 944   W.printEnum  ("StorageClass", Symbol->StorageClass,
 945                                                    makeArrayRef(ImageSymClass));
 946   W.printNumber("AuxSymbolCount", Symbol->NumberOfAuxSymbols);
 947
 948   for (unsigned I = 0; I < Symbol->NumberOfAuxSymbols; ++I) {
 949     if (Symbol->isFunctionDefinition()) {
 950       const coff_aux_function_definition *Aux;
 951       if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
 952         break;
 953
 954       DictScope AS(W, "AuxFunctionDef");
 955       W.printNumber("TagIndex", Aux->TagIndex);
 956       W.printNumber("TotalSize", Aux->TotalSize);
 957       W.printHex("PointerToLineNumber", Aux->PointerToLinenumber);
 958       W.printHex("PointerToNextFunction", Aux->PointerToNextFunction);
 959       W.printBinary("Unused", makeArrayRef(Aux->Unused));
 960
 961     } else if (Symbol->isWeakExternal()) {
 962       const coff_aux_weak_external *Aux;
 963       if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
 964         break;
 965
 966       const coff_symbol *Linked;
 967       StringRef LinkedName;
 968       error_code EC;
 969       if ((EC = Obj->getSymbol(Aux->TagIndex, Linked)) ||
 970           (EC = Obj->getSymbolName(Linked, LinkedName))) {
 971         LinkedName = "";
 972         error(EC);
 973       }
 974
 975       DictScope AS(W, "AuxWeakExternal");
 976       W.printNumber("Linked", LinkedName, Aux->TagIndex);
 977       W.printEnum  ("Search", Aux->Characteristics,
 978                     makeArrayRef(WeakExternalCharacteristics));
 979       W.printBinary("Unused", makeArrayRef(Aux->Unused));
 980
 981     } else if (Symbol->isFileRecord()) {
 982       const coff_aux_file_record *Aux;
 983       if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
 984         break;
 985
 986       DictScope AS(W, "AuxFileRecord");
 987       W.printString("FileName", StringRef(Aux->FileName));
 988
 989     } else if (Symbol->isSectionDefinition()) {
 990       const coff_aux_section_definition *Aux;
 991       if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
 992         break;
 993
 994       DictScope AS(W, "AuxSectionDef");
 995       W.printNumber("Length", Aux->Length);
 996       W.printNumber("RelocationCount", Aux->NumberOfRelocations);
 997       W.printNumber("LineNumberCount", Aux->NumberOfLinenumbers);
 998       W.printHex("Checksum", Aux->CheckSum);
 999       W.printNumber("Number", Aux->Number);
1000       W.printEnum("Selection", Aux->Selection, makeArrayRef(ImageCOMDATSelect));
1001       W.printBinary("Unused", makeArrayRef(Aux->Unused));
1002
1003       if (Section && Section->Characteristics & COFF::IMAGE_SCN_LNK_COMDAT
1004           && Aux->Selection == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE) {
1005         const coff_section *Assoc;
1006         StringRef AssocName;
1007         error_code EC;
1008         if ((EC = Obj->getSection(Aux->Number, Assoc)) ||
1009             (EC = Obj->getSectionName(Assoc, AssocName))) {
1010           AssocName = "";
1011           error(EC);
1012         }
1013
1014         W.printNumber("AssocSection", AssocName, Aux->Number);
1015       }
1016     } else if (Symbol->isCLRToken()) {
1017       const coff_aux_clr_token *Aux;
1018       if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
1019         break;
1020
1021       const coff_symbol *ReferredSym;
1022       StringRef ReferredName;
1023       error_code EC;
1024       if ((EC = Obj->getSymbol(Aux->SymbolTableIndex, ReferredSym)) ||
1025           (EC = Obj->getSymbolName(ReferredSym, ReferredName))) {
1026         ReferredName = "";
1027         error(EC);
1028       }
1029
1030       DictScope AS(W, "AuxCLRToken");
1031       W.printNumber("AuxType", Aux->AuxType);
1032       W.printNumber("Reserved", Aux->Reserved);
1033       W.printNumber("SymbolTableIndex", ReferredName, Aux->SymbolTableIndex);
1034       W.printBinary("Unused", makeArrayRef(Aux->Unused));
1035
1036     } else {
1037       W.startLine() << "<unhandled auxiliary record>\n";
1038     }
1039   }
1040 }
1041
1042 void COFFDumper::printUnwindInfo() {
1043   const coff_file_header *Header;
1044   if (error(Obj->getCOFFHeader(Header)))
1045     return;
1046
1047   ListScope D(W, "UnwindInformation");
1048   if (Header->Machine != COFF::IMAGE_FILE_MACHINE_AMD64) {
1049     W.startLine() << "Unsupported image machine type "
1050               "(currently only AMD64 is supported).\n";
1051     return;
1052   }
1053
1054   printX64UnwindInfo();
1055 }
1056
1057 void COFFDumper::printX64UnwindInfo() {
1058   for (const SectionRef &Section : Obj->sections()) {
1059     StringRef Name;
1060     if (error(Section.getName(Name)))
1061       continue;
1062     if (Name != ".pdata" && !Name.startswith(".pdata$"))
1063       continue;
1064
1065     const coff_section *PData = Obj->getCOFFSection(Section);
1066
1067     ArrayRef<uint8_t> Contents;
1068     if (error(Obj->getSectionContents(PData, Contents)) || Contents.empty())
1069       continue;
1070
1071     ArrayRef<RuntimeFunction> RFs(
1072       reinterpret_cast<const RuntimeFunction *>(Contents.data()),
1073       Contents.size() / sizeof(RuntimeFunction));
1074
1075     for (const RuntimeFunction *I = RFs.begin(), *E = RFs.end(); I < E; ++I) {
1076       const uint64_t OffsetInSection = std::distance(RFs.begin(), I)
1077                                      * sizeof(RuntimeFunction);
1078
1079       printRuntimeFunction(*I, OffsetInSection, RelocMap[PData]);
1080     }
1081   }
1082 }
1083
1084 void COFFDumper::printRuntimeFunction(
1085     const RuntimeFunction& RTF,
1086     uint64_t OffsetInSection,
1087     const std::vector<RelocationRef> &Rels) {
1088
1089   DictScope D(W, "RuntimeFunction");
1090   W.printString("StartAddress",
1091                 formatSymbol(Rels, OffsetInSection + 0, RTF.StartAddress));
1092   W.printString("EndAddress",
1093                 formatSymbol(Rels, OffsetInSection + 4, RTF.EndAddress));
1094   W.printString("UnwindInfoAddress",
1095                 formatSymbol(Rels, OffsetInSection + 8, RTF.UnwindInfoOffset));
1096
1097   const coff_section* XData = 0;
1098   uint64_t UnwindInfoOffset = 0;
1099   if (error(getSection(Rels, OffsetInSection + 8, &XData, &UnwindInfoOffset)))
1100     return;
1101
1102   ArrayRef<uint8_t> XContents;
1103   if (error(Obj->getSectionContents(XData, XContents)) || XContents.empty())
1104     return;
1105
1106   UnwindInfoOffset += RTF.UnwindInfoOffset;
1107   if (UnwindInfoOffset > XContents.size())
1108     return;
1109
1110   const Win64EH::UnwindInfo *UI =
1111     reinterpret_cast<const Win64EH::UnwindInfo *>(
1112       XContents.data() + UnwindInfoOffset);
1113
1114   printUnwindInfo(*UI, UnwindInfoOffset, RelocMap[XData]);
1115 }
1116
1117 void COFFDumper::printUnwindInfo(
1118     const Win64EH::UnwindInfo& UI,
1119     uint64_t OffsetInSection,
1120     const std::vector<RelocationRef> &Rels) {
1121   DictScope D(W, "UnwindInfo");
1122   W.printNumber("Version", UI.getVersion());
1123   W.printFlags("Flags", UI.getFlags(), makeArrayRef(UnwindFlags));
1124   W.printNumber("PrologSize", UI.PrologSize);
1125   if (UI.getFrameRegister() != 0) {
1126     W.printEnum("FrameRegister", UI.getFrameRegister(),
1127                 makeArrayRef(UnwindOpInfo));
1128     W.printHex("FrameOffset", UI.getFrameOffset());
1129   } else {
1130     W.printString("FrameRegister", StringRef("-"));
1131     W.printString("FrameOffset", StringRef("-"));
1132   }
1133
1134   W.printNumber("UnwindCodeCount", UI.NumCodes);
1135   {
1136     ListScope CodesD(W, "UnwindCodes");
1137     ArrayRef<UnwindCode> UCs(&UI.UnwindCodes[0], UI.NumCodes);
1138     for (const UnwindCode *I = UCs.begin(), *E = UCs.end(); I < E; ++I) {
1139       unsigned UsedSlots = getNumUsedSlots(*I);
1140       if (UsedSlots > UCs.size()) {
1141         errs() << "Corrupt unwind data";
1142         return;
1143       }
1144       printUnwindCode(UI, ArrayRef<UnwindCode>(I, E));
1145       I += UsedSlots - 1;
1146     }
1147   }
1148
1149   uint64_t LSDAOffset = OffsetInSection + getOffsetOfLSDA(UI);
1150   if (UI.getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) {
1151     W.printString("Handler", formatSymbol(Rels, LSDAOffset,
1152                                         UI.getLanguageSpecificHandlerOffset()));
1153   } else if (UI.getFlags() & UNW_ChainInfo) {
1154     const RuntimeFunction *Chained = UI.getChainedFunctionEntry();
1155     if (Chained) {
1156       DictScope D(W, "Chained");
1157       W.printString("StartAddress", formatSymbol(Rels, LSDAOffset + 0,
1158                                                         Chained->StartAddress));
1159       W.printString("EndAddress", formatSymbol(Rels, LSDAOffset + 4,
1160                                                           Chained->EndAddress));
1161       W.printString("UnwindInfoAddress", formatSymbol(Rels, LSDAOffset + 8,
1162                                                     Chained->UnwindInfoOffset));
1163     }
1164   }
1165 }
1166
1167 // Prints one unwind code. Because an unwind code can occupy up to 3 slots in
1168 // the unwind codes array, this function requires that the correct number of
1169 // slots is provided.
1170 void COFFDumper::printUnwindCode(const Win64EH::UnwindInfo& UI,
1171                                  ArrayRef<UnwindCode> UCs) {
1172   assert(UCs.size() >= getNumUsedSlots(UCs[0]));
1173
1174   W.startLine() << format("0x%02X: ", unsigned(UCs[0].u.CodeOffset))
1175                 << getUnwindCodeTypeName(UCs[0].getUnwindOp());
1176
1177   uint32_t AllocSize = 0;
1178
1179   switch (UCs[0].getUnwindOp()) {
1180   case UOP_PushNonVol:
1181     outs() << " reg=" << getUnwindRegisterName(UCs[0].getOpInfo());
1182     break;
1183
1184   case UOP_AllocLarge:
1185     if (UCs[0].getOpInfo() == 0) {
1186       AllocSize = UCs[1].FrameOffset * 8;
1187     } else {
1188       AllocSize = getLargeSlotValue(UCs);
1189     }
1190     outs() << " size=" << AllocSize;
1191     break;
1192   case UOP_AllocSmall:
1193     outs() << " size=" << ((UCs[0].getOpInfo() + 1) * 8);
1194     break;
1195   case UOP_SetFPReg:
1196     if (UI.getFrameRegister() == 0) {
1197       outs() << " reg=<invalid>";
1198     } else {
1199       outs() << " reg=" << getUnwindRegisterName(UI.getFrameRegister())
1200              << format(", offset=0x%X", UI.getFrameOffset() * 16);
1201     }
1202     break;
1203   case UOP_SaveNonVol:
1204     outs() << " reg=" << getUnwindRegisterName(UCs[0].getOpInfo())
1205            << format(", offset=0x%X", UCs[1].FrameOffset * 8);
1206     break;
1207   case UOP_SaveNonVolBig:
1208     outs() << " reg=" << getUnwindRegisterName(UCs[0].getOpInfo())
1209            << format(", offset=0x%X", getLargeSlotValue(UCs));
1210     break;
1211   case UOP_SaveXMM128:
1212     outs() << " reg=XMM" << static_cast<uint32_t>(UCs[0].getOpInfo())
1213            << format(", offset=0x%X", UCs[1].FrameOffset * 16);
1214     break;
1215   case UOP_SaveXMM128Big:
1216     outs() << " reg=XMM" << static_cast<uint32_t>(UCs[0].getOpInfo())
1217            << format(", offset=0x%X", getLargeSlotValue(UCs));
1218     break;
1219   case UOP_PushMachFrame:
1220     outs() << " errcode=" << (UCs[0].getOpInfo() == 0 ? "no" : "yes");
1221     break;
1222   }
1223
1224   outs() << "\n";
1225 }