1//===-- COFFDump.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-objdump.
12/// It outputs the Win64 EH data structures as plain text.
13/// The encoding of the unwind codes is described in MSDN:
14/// http://msdn.microsoft.com/en-us/library/ck9asaa9.aspx
15///
16//===----------------------------------------------------------------------===//
17
18#include "llvm-objdump.h"
19#include "llvm/Object/COFF.h"
20#include "llvm/Object/ObjectFile.h"
21#include "llvm/Support/Format.h"
22#include "llvm/Support/SourceMgr.h"
23#include "llvm/Support/Win64EH.h"
24#include "llvm/Support/raw_ostream.h"
25#include <algorithm>
26#include <cstring>
27#include <system_error>
28
29using namespace llvm;
30using namespace object;
31using namespace llvm::Win64EH;
32
33// Returns the name of the unwind code.
34static StringRef getUnwindCodeTypeName(uint8_t Code) {
35  switch(Code) {
36  default: llvm_unreachable("Invalid unwind code");
37  case UOP_PushNonVol: return "UOP_PushNonVol";
38  case UOP_AllocLarge: return "UOP_AllocLarge";
39  case UOP_AllocSmall: return "UOP_AllocSmall";
40  case UOP_SetFPReg: return "UOP_SetFPReg";
41  case UOP_SaveNonVol: return "UOP_SaveNonVol";
42  case UOP_SaveNonVolBig: return "UOP_SaveNonVolBig";
43  case UOP_SaveXMM128: return "UOP_SaveXMM128";
44  case UOP_SaveXMM128Big: return "UOP_SaveXMM128Big";
45  case UOP_PushMachFrame: return "UOP_PushMachFrame";
46  }
47}
48
49// Returns the name of a referenced register.
50static StringRef getUnwindRegisterName(uint8_t Reg) {
51  switch(Reg) {
52  default: llvm_unreachable("Invalid register");
53  case 0: return "RAX";
54  case 1: return "RCX";
55  case 2: return "RDX";
56  case 3: return "RBX";
57  case 4: return "RSP";
58  case 5: return "RBP";
59  case 6: return "RSI";
60  case 7: return "RDI";
61  case 8: return "R8";
62  case 9: return "R9";
63  case 10: return "R10";
64  case 11: return "R11";
65  case 12: return "R12";
66  case 13: return "R13";
67  case 14: return "R14";
68  case 15: return "R15";
69  }
70}
71
72// Calculates the number of array slots required for the unwind code.
73static unsigned getNumUsedSlots(const UnwindCode &UnwindCode) {
74  switch (UnwindCode.getUnwindOp()) {
75  default: llvm_unreachable("Invalid unwind code");
76  case UOP_PushNonVol:
77  case UOP_AllocSmall:
78  case UOP_SetFPReg:
79  case UOP_PushMachFrame:
80    return 1;
81  case UOP_SaveNonVol:
82  case UOP_SaveXMM128:
83    return 2;
84  case UOP_SaveNonVolBig:
85  case UOP_SaveXMM128Big:
86    return 3;
87  case UOP_AllocLarge:
88    return (UnwindCode.getOpInfo() == 0) ? 2 : 3;
89  }
90}
91
92// Prints one unwind code. Because an unwind code can occupy up to 3 slots in
93// the unwind codes array, this function requires that the correct number of
94// slots is provided.
95static void printUnwindCode(ArrayRef<UnwindCode> UCs) {
96  assert(UCs.size() >= getNumUsedSlots(UCs[0]));
97  outs() <<  format("      0x%02x: ", unsigned(UCs[0].u.CodeOffset))
98         << getUnwindCodeTypeName(UCs[0].getUnwindOp());
99  switch (UCs[0].getUnwindOp()) {
100  case UOP_PushNonVol:
101    outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo());
102    break;
103  case UOP_AllocLarge:
104    if (UCs[0].getOpInfo() == 0) {
105      outs() << " " << UCs[1].FrameOffset;
106    } else {
107      outs() << " " << UCs[1].FrameOffset
108                       + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16);
109    }
110    break;
111  case UOP_AllocSmall:
112    outs() << " " << ((UCs[0].getOpInfo() + 1) * 8);
113    break;
114  case UOP_SetFPReg:
115    outs() << " ";
116    break;
117  case UOP_SaveNonVol:
118    outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo())
119           << format(" [0x%04x]", 8 * UCs[1].FrameOffset);
120    break;
121  case UOP_SaveNonVolBig:
122    outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo())
123           << format(" [0x%08x]", UCs[1].FrameOffset
124                    + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16));
125    break;
126  case UOP_SaveXMM128:
127    outs() << " XMM" << static_cast<uint32_t>(UCs[0].getOpInfo())
128           << format(" [0x%04x]", 16 * UCs[1].FrameOffset);
129    break;
130  case UOP_SaveXMM128Big:
131    outs() << " XMM" << UCs[0].getOpInfo()
132           << format(" [0x%08x]", UCs[1].FrameOffset
133                           + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16));
134    break;
135  case UOP_PushMachFrame:
136    outs() << " " << (UCs[0].getOpInfo() ? "w/o" : "w")
137           << " error code";
138    break;
139  }
140  outs() << "\n";
141}
142
143static void printAllUnwindCodes(ArrayRef<UnwindCode> UCs) {
144  for (const UnwindCode *I = UCs.begin(), *E = UCs.end(); I < E; ) {
145    unsigned UsedSlots = getNumUsedSlots(*I);
146    if (UsedSlots > UCs.size()) {
147      outs() << "Unwind data corrupted: Encountered unwind op "
148             << getUnwindCodeTypeName((*I).getUnwindOp())
149             << " which requires " << UsedSlots
150             << " slots, but only " << UCs.size()
151             << " remaining in buffer";
152      return ;
153    }
154    printUnwindCode(makeArrayRef(I, E));
155    I += UsedSlots;
156  }
157}
158
159// Given a symbol sym this functions returns the address and section of it.
160static std::error_code
161resolveSectionAndAddress(const COFFObjectFile *Obj, const SymbolRef &Sym,
162                         const coff_section *&ResolvedSection,
163                         uint64_t &ResolvedAddr) {
164  ErrorOr<uint64_t> ResolvedAddrOrErr = Sym.getAddress();
165  if (std::error_code EC = ResolvedAddrOrErr.getError())
166    return EC;
167  ResolvedAddr = *ResolvedAddrOrErr;
168  ErrorOr<section_iterator> Iter = Sym.getSection();
169  if (std::error_code EC = Iter.getError())
170    return EC;
171  ResolvedSection = Obj->getCOFFSection(**Iter);
172  return std::error_code();
173}
174
175// Given a vector of relocations for a section and an offset into this section
176// the function returns the symbol used for the relocation at the offset.
177static std::error_code resolveSymbol(const std::vector<RelocationRef> &Rels,
178                                     uint64_t Offset, SymbolRef &Sym) {
179  for (std::vector<RelocationRef>::const_iterator I = Rels.begin(),
180                                                  E = Rels.end();
181                                                  I != E; ++I) {
182    uint64_t Ofs = I->getOffset();
183    if (Ofs == Offset) {
184      Sym = *I->getSymbol();
185      return std::error_code();
186    }
187  }
188  return object_error::parse_failed;
189}
190
191// Given a vector of relocations for a section and an offset into this section
192// the function resolves the symbol used for the relocation at the offset and
193// returns the section content and the address inside the content pointed to
194// by the symbol.
195static std::error_code
196getSectionContents(const COFFObjectFile *Obj,
197                   const std::vector<RelocationRef> &Rels, uint64_t Offset,
198                   ArrayRef<uint8_t> &Contents, uint64_t &Addr) {
199  SymbolRef Sym;
200  if (std::error_code EC = resolveSymbol(Rels, Offset, Sym))
201    return EC;
202  const coff_section *Section;
203  if (std::error_code EC = resolveSectionAndAddress(Obj, Sym, Section, Addr))
204    return EC;
205  if (std::error_code EC = Obj->getSectionContents(Section, Contents))
206    return EC;
207  return std::error_code();
208}
209
210// Given a vector of relocations for a section and an offset into this section
211// the function returns the name of the symbol used for the relocation at the
212// offset.
213static std::error_code resolveSymbolName(const std::vector<RelocationRef> &Rels,
214                                         uint64_t Offset, StringRef &Name) {
215  SymbolRef Sym;
216  if (std::error_code EC = resolveSymbol(Rels, Offset, Sym))
217    return EC;
218  ErrorOr<StringRef> NameOrErr = Sym.getName();
219  if (std::error_code EC = NameOrErr.getError())
220    return EC;
221  Name = *NameOrErr;
222  return std::error_code();
223}
224
225static void printCOFFSymbolAddress(llvm::raw_ostream &Out,
226                                   const std::vector<RelocationRef> &Rels,
227                                   uint64_t Offset, uint32_t Disp) {
228  StringRef Sym;
229  if (!resolveSymbolName(Rels, Offset, Sym)) {
230    Out << Sym;
231    if (Disp > 0)
232      Out << format(" + 0x%04x", Disp);
233  } else {
234    Out << format("0x%04x", Disp);
235  }
236}
237
238static void
239printSEHTable(const COFFObjectFile *Obj, uint32_t TableVA, int Count) {
240  if (Count == 0)
241    return;
242
243  const pe32_header *PE32Header;
244  error(Obj->getPE32Header(PE32Header));
245  uint32_t ImageBase = PE32Header->ImageBase;
246  uintptr_t IntPtr = 0;
247  error(Obj->getVaPtr(TableVA, IntPtr));
248  const support::ulittle32_t *P = (const support::ulittle32_t *)IntPtr;
249  outs() << "SEH Table:";
250  for (int I = 0; I < Count; ++I)
251    outs() << format(" 0x%x", P[I] + ImageBase);
252  outs() << "\n\n";
253}
254
255static void printLoadConfiguration(const COFFObjectFile *Obj) {
256  // Skip if it's not executable.
257  const pe32_header *PE32Header;
258  error(Obj->getPE32Header(PE32Header));
259  if (!PE32Header)
260    return;
261
262  // Currently only x86 is supported
263  if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_I386)
264    return;
265
266  const data_directory *DataDir;
267  error(Obj->getDataDirectory(COFF::LOAD_CONFIG_TABLE, DataDir));
268  uintptr_t IntPtr = 0;
269  if (DataDir->RelativeVirtualAddress == 0)
270    return;
271  error(Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr));
272
273  auto *LoadConf = reinterpret_cast<const coff_load_configuration32 *>(IntPtr);
274  outs() << "Load configuration:"
275         << "\n  Timestamp: " << LoadConf->TimeDateStamp
276         << "\n  Major Version: " << LoadConf->MajorVersion
277         << "\n  Minor Version: " << LoadConf->MinorVersion
278         << "\n  GlobalFlags Clear: " << LoadConf->GlobalFlagsClear
279         << "\n  GlobalFlags Set: " << LoadConf->GlobalFlagsSet
280         << "\n  Critical Section Default Timeout: " << LoadConf->CriticalSectionDefaultTimeout
281         << "\n  Decommit Free Block Threshold: " << LoadConf->DeCommitFreeBlockThreshold
282         << "\n  Decommit Total Free Threshold: " << LoadConf->DeCommitTotalFreeThreshold
283         << "\n  Lock Prefix Table: " << LoadConf->LockPrefixTable
284         << "\n  Maximum Allocation Size: " << LoadConf->MaximumAllocationSize
285         << "\n  Virtual Memory Threshold: " << LoadConf->VirtualMemoryThreshold
286         << "\n  Process Affinity Mask: " << LoadConf->ProcessAffinityMask
287         << "\n  Process Heap Flags: " << LoadConf->ProcessHeapFlags
288         << "\n  CSD Version: " << LoadConf->CSDVersion
289         << "\n  Security Cookie: " << LoadConf->SecurityCookie
290         << "\n  SEH Table: " << LoadConf->SEHandlerTable
291         << "\n  SEH Count: " << LoadConf->SEHandlerCount
292         << "\n\n";
293  printSEHTable(Obj, LoadConf->SEHandlerTable, LoadConf->SEHandlerCount);
294  outs() << "\n";
295}
296
297// Prints import tables. The import table is a table containing the list of
298// DLL name and symbol names which will be linked by the loader.
299static void printImportTables(const COFFObjectFile *Obj) {
300  import_directory_iterator I = Obj->import_directory_begin();
301  import_directory_iterator E = Obj->import_directory_end();
302  if (I == E)
303    return;
304  outs() << "The Import Tables:\n";
305  for (; I != E; I = ++I) {
306    const import_directory_table_entry *Dir;
307    StringRef Name;
308    if (I->getImportTableEntry(Dir)) return;
309    if (I->getName(Name)) return;
310
311    outs() << format("  lookup %08x time %08x fwd %08x name %08x addr %08x\n\n",
312                     static_cast<uint32_t>(Dir->ImportLookupTableRVA),
313                     static_cast<uint32_t>(Dir->TimeDateStamp),
314                     static_cast<uint32_t>(Dir->ForwarderChain),
315                     static_cast<uint32_t>(Dir->NameRVA),
316                     static_cast<uint32_t>(Dir->ImportAddressTableRVA));
317    outs() << "    DLL Name: " << Name << "\n";
318    outs() << "    Hint/Ord  Name\n";
319    const import_lookup_table_entry32 *entry;
320    if (I->getImportLookupEntry(entry))
321      return;
322    for (; entry->Data; ++entry) {
323      if (entry->isOrdinal()) {
324        outs() << format("      % 6d\n", entry->getOrdinal());
325        continue;
326      }
327      uint16_t Hint;
328      StringRef Name;
329      if (Obj->getHintName(entry->getHintNameRVA(), Hint, Name))
330        return;
331      outs() << format("      % 6d  ", Hint) << Name << "\n";
332    }
333    outs() << "\n";
334  }
335}
336
337// Prints export tables. The export table is a table containing the list of
338// exported symbol from the DLL.
339static void printExportTable(const COFFObjectFile *Obj) {
340  outs() << "Export Table:\n";
341  export_directory_iterator I = Obj->export_directory_begin();
342  export_directory_iterator E = Obj->export_directory_end();
343  if (I == E)
344    return;
345  StringRef DllName;
346  uint32_t OrdinalBase;
347  if (I->getDllName(DllName))
348    return;
349  if (I->getOrdinalBase(OrdinalBase))
350    return;
351  outs() << " DLL name: " << DllName << "\n";
352  outs() << " Ordinal base: " << OrdinalBase << "\n";
353  outs() << " Ordinal      RVA  Name\n";
354  for (; I != E; I = ++I) {
355    uint32_t Ordinal;
356    if (I->getOrdinal(Ordinal))
357      return;
358    uint32_t RVA;
359    if (I->getExportRVA(RVA))
360      return;
361    bool IsForwarder;
362    if (I->isForwarder(IsForwarder))
363      return;
364
365    if (IsForwarder) {
366      // Export table entries can be used to re-export symbols that
367      // this COFF file is imported from some DLLs. This is rare.
368      // In most cases IsForwarder is false.
369      outs() << format("    % 4d         ", Ordinal);
370    } else {
371      outs() << format("    % 4d %# 8x", Ordinal, RVA);
372    }
373
374    StringRef Name;
375    if (I->getSymbolName(Name))
376      continue;
377    if (!Name.empty())
378      outs() << "  " << Name;
379    if (IsForwarder) {
380      StringRef S;
381      if (I->getForwardTo(S))
382        return;
383      outs() << " (forwarded to " << S << ")";
384    }
385    outs() << "\n";
386  }
387}
388
389// Given the COFF object file, this function returns the relocations for .pdata
390// and the pointer to "runtime function" structs.
391static bool getPDataSection(const COFFObjectFile *Obj,
392                            std::vector<RelocationRef> &Rels,
393                            const RuntimeFunction *&RFStart, int &NumRFs) {
394  for (const SectionRef &Section : Obj->sections()) {
395    StringRef Name;
396    error(Section.getName(Name));
397    if (Name != ".pdata")
398      continue;
399
400    const coff_section *Pdata = Obj->getCOFFSection(Section);
401    for (const RelocationRef &Reloc : Section.relocations())
402      Rels.push_back(Reloc);
403
404    // Sort relocations by address.
405    std::sort(Rels.begin(), Rels.end(), RelocAddressLess);
406
407    ArrayRef<uint8_t> Contents;
408    error(Obj->getSectionContents(Pdata, Contents));
409    if (Contents.empty())
410      continue;
411
412    RFStart = reinterpret_cast<const RuntimeFunction *>(Contents.data());
413    NumRFs = Contents.size() / sizeof(RuntimeFunction);
414    return true;
415  }
416  return false;
417}
418
419static void printWin64EHUnwindInfo(const Win64EH::UnwindInfo *UI) {
420  // The casts to int are required in order to output the value as number.
421  // Without the casts the value would be interpreted as char data (which
422  // results in garbage output).
423  outs() << "    Version: " << static_cast<int>(UI->getVersion()) << "\n";
424  outs() << "    Flags: " << static_cast<int>(UI->getFlags());
425  if (UI->getFlags()) {
426    if (UI->getFlags() & UNW_ExceptionHandler)
427      outs() << " UNW_ExceptionHandler";
428    if (UI->getFlags() & UNW_TerminateHandler)
429      outs() << " UNW_TerminateHandler";
430    if (UI->getFlags() & UNW_ChainInfo)
431      outs() << " UNW_ChainInfo";
432  }
433  outs() << "\n";
434  outs() << "    Size of prolog: " << static_cast<int>(UI->PrologSize) << "\n";
435  outs() << "    Number of Codes: " << static_cast<int>(UI->NumCodes) << "\n";
436  // Maybe this should move to output of UOP_SetFPReg?
437  if (UI->getFrameRegister()) {
438    outs() << "    Frame register: "
439           << getUnwindRegisterName(UI->getFrameRegister()) << "\n";
440    outs() << "    Frame offset: " << 16 * UI->getFrameOffset() << "\n";
441  } else {
442    outs() << "    No frame pointer used\n";
443  }
444  if (UI->getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) {
445    // FIXME: Output exception handler data
446  } else if (UI->getFlags() & UNW_ChainInfo) {
447    // FIXME: Output chained unwind info
448  }
449
450  if (UI->NumCodes)
451    outs() << "    Unwind Codes:\n";
452
453  printAllUnwindCodes(makeArrayRef(&UI->UnwindCodes[0], UI->NumCodes));
454
455  outs() << "\n";
456  outs().flush();
457}
458
459/// Prints out the given RuntimeFunction struct for x64, assuming that Obj is
460/// pointing to an executable file.
461static void printRuntimeFunction(const COFFObjectFile *Obj,
462                                 const RuntimeFunction &RF) {
463  if (!RF.StartAddress)
464    return;
465  outs() << "Function Table:\n"
466         << format("  Start Address: 0x%04x\n",
467                   static_cast<uint32_t>(RF.StartAddress))
468         << format("  End Address: 0x%04x\n",
469                   static_cast<uint32_t>(RF.EndAddress))
470         << format("  Unwind Info Address: 0x%04x\n",
471                   static_cast<uint32_t>(RF.UnwindInfoOffset));
472  uintptr_t addr;
473  if (Obj->getRvaPtr(RF.UnwindInfoOffset, addr))
474    return;
475  printWin64EHUnwindInfo(reinterpret_cast<const Win64EH::UnwindInfo *>(addr));
476}
477
478/// Prints out the given RuntimeFunction struct for x64, assuming that Obj is
479/// pointing to an object file. Unlike executable, fields in RuntimeFunction
480/// struct are filled with zeros, but instead there are relocations pointing to
481/// them so that the linker will fill targets' RVAs to the fields at link
482/// time. This function interprets the relocations to find the data to be used
483/// in the resulting executable.
484static void printRuntimeFunctionRels(const COFFObjectFile *Obj,
485                                     const RuntimeFunction &RF,
486                                     uint64_t SectionOffset,
487                                     const std::vector<RelocationRef> &Rels) {
488  outs() << "Function Table:\n";
489  outs() << "  Start Address: ";
490  printCOFFSymbolAddress(outs(), Rels,
491                         SectionOffset +
492                             /*offsetof(RuntimeFunction, StartAddress)*/ 0,
493                         RF.StartAddress);
494  outs() << "\n";
495
496  outs() << "  End Address: ";
497  printCOFFSymbolAddress(outs(), Rels,
498                         SectionOffset +
499                             /*offsetof(RuntimeFunction, EndAddress)*/ 4,
500                         RF.EndAddress);
501  outs() << "\n";
502
503  outs() << "  Unwind Info Address: ";
504  printCOFFSymbolAddress(outs(), Rels,
505                         SectionOffset +
506                             /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
507                         RF.UnwindInfoOffset);
508  outs() << "\n";
509
510  ArrayRef<uint8_t> XContents;
511  uint64_t UnwindInfoOffset = 0;
512  error(getSectionContents(
513          Obj, Rels, SectionOffset +
514                         /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
515          XContents, UnwindInfoOffset));
516  if (XContents.empty())
517    return;
518
519  UnwindInfoOffset += RF.UnwindInfoOffset;
520  if (UnwindInfoOffset > XContents.size())
521    return;
522
523  auto *UI = reinterpret_cast<const Win64EH::UnwindInfo *>(XContents.data() +
524                                                           UnwindInfoOffset);
525  printWin64EHUnwindInfo(UI);
526}
527
528void llvm::printCOFFUnwindInfo(const COFFObjectFile *Obj) {
529  if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_AMD64) {
530    errs() << "Unsupported image machine type "
531              "(currently only AMD64 is supported).\n";
532    return;
533  }
534
535  std::vector<RelocationRef> Rels;
536  const RuntimeFunction *RFStart;
537  int NumRFs;
538  if (!getPDataSection(Obj, Rels, RFStart, NumRFs))
539    return;
540  ArrayRef<RuntimeFunction> RFs(RFStart, NumRFs);
541
542  bool IsExecutable = Rels.empty();
543  if (IsExecutable) {
544    for (const RuntimeFunction &RF : RFs)
545      printRuntimeFunction(Obj, RF);
546    return;
547  }
548
549  for (const RuntimeFunction &RF : RFs) {
550    uint64_t SectionOffset =
551        std::distance(RFs.begin(), &RF) * sizeof(RuntimeFunction);
552    printRuntimeFunctionRels(Obj, RF, SectionOffset, Rels);
553  }
554}
555
556void llvm::printCOFFFileHeader(const object::ObjectFile *Obj) {
557  const COFFObjectFile *file = dyn_cast<const COFFObjectFile>(Obj);
558  printLoadConfiguration(file);
559  printImportTables(file);
560  printExportTable(file);
561}
562
563void llvm::printCOFFSymbolTable(const COFFObjectFile *coff) {
564  for (unsigned SI = 0, SE = coff->getNumberOfSymbols(); SI != SE; ++SI) {
565    ErrorOr<COFFSymbolRef> Symbol = coff->getSymbol(SI);
566    StringRef Name;
567    error(Symbol.getError());
568    error(coff->getSymbolName(*Symbol, Name));
569
570    outs() << "[" << format("%2d", SI) << "]"
571           << "(sec " << format("%2d", int(Symbol->getSectionNumber())) << ")"
572           << "(fl 0x00)" // Flag bits, which COFF doesn't have.
573           << "(ty " << format("%3x", unsigned(Symbol->getType())) << ")"
574           << "(scl " << format("%3x", unsigned(Symbol->getStorageClass())) << ") "
575           << "(nx " << unsigned(Symbol->getNumberOfAuxSymbols()) << ") "
576           << "0x" << format("%08x", unsigned(Symbol->getValue())) << " "
577           << Name << "\n";
578
579    for (unsigned AI = 0, AE = Symbol->getNumberOfAuxSymbols(); AI < AE; ++AI, ++SI) {
580      if (Symbol->isSectionDefinition()) {
581        const coff_aux_section_definition *asd;
582        error(coff->getAuxSymbol<coff_aux_section_definition>(SI + 1, asd));
583
584        int32_t AuxNumber = asd->getNumber(Symbol->isBigObj());
585
586        outs() << "AUX "
587               << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x "
588                         , unsigned(asd->Length)
589                         , unsigned(asd->NumberOfRelocations)
590                         , unsigned(asd->NumberOfLinenumbers)
591                         , unsigned(asd->CheckSum))
592               << format("assoc %d comdat %d\n"
593                         , unsigned(AuxNumber)
594                         , unsigned(asd->Selection));
595      } else if (Symbol->isFileRecord()) {
596        const char *FileName;
597        error(coff->getAuxSymbol<char>(SI + 1, FileName));
598
599        StringRef Name(FileName, Symbol->getNumberOfAuxSymbols() *
600                                     coff->getSymbolTableEntrySize());
601        outs() << "AUX " << Name.rtrim(StringRef("\0", 1))  << '\n';
602
603        SI = SI + Symbol->getNumberOfAuxSymbols();
604        break;
605      } else {
606        outs() << "AUX Unknown\n";
607      }
608    }
609  }
610}
611