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[obj2yaml] - Rework tool's error reporting logic for ELF target.
[llvm-complete.git] / tools / llvm-objdump / COFFDump.cpp
blob1ba0a68902c9276b7c7a9b6bf04b851a423b2fbc
1 //===-- COFFDump.cpp - COFF-specific dumper ---------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// \file
10 /// This file implements the COFF-specific dumper for llvm-objdump.
11 /// It outputs the Win64 EH data structures as plain text.
12 /// The encoding of the unwind codes is described in MSDN:
13 /// http://msdn.microsoft.com/en-us/library/ck9asaa9.aspx
14 ///
15 //===----------------------------------------------------------------------===//
16
17 #include "llvm-objdump.h"
18 #include "llvm/Demangle/Demangle.h"
19 #include "llvm/Object/COFF.h"
20 #include "llvm/Object/COFFImportFile.h"
21 #include "llvm/Object/ObjectFile.h"
22 #include "llvm/Support/Format.h"
23 #include "llvm/Support/Win64EH.h"
24 #include "llvm/Support/WithColor.h"
25 #include "llvm/Support/raw_ostream.h"
26
27 using namespace llvm::object;
28 using namespace llvm::Win64EH;
29
30 namespace llvm {
31 // Returns the name of the unwind code.
32 static StringRef getUnwindCodeTypeName(uint8_t Code) {
33 switch(Code) {
34 default: llvm_unreachable("Invalid unwind code");
35 case UOP_PushNonVol: return "UOP_PushNonVol";
36 case UOP_AllocLarge: return "UOP_AllocLarge";
37 case UOP_AllocSmall: return "UOP_AllocSmall";
38 case UOP_SetFPReg: return "UOP_SetFPReg";
39 case UOP_SaveNonVol: return "UOP_SaveNonVol";
40 case UOP_SaveNonVolBig: return "UOP_SaveNonVolBig";
41 case UOP_SaveXMM128: return "UOP_SaveXMM128";
42 case UOP_SaveXMM128Big: return "UOP_SaveXMM128Big";
43 case UOP_PushMachFrame: return "UOP_PushMachFrame";
44 }
45 }
46
47 // Returns the name of a referenced register.
48 static StringRef getUnwindRegisterName(uint8_t Reg) {
49 switch(Reg) {
50 default: llvm_unreachable("Invalid register");
51 case 0: return "RAX";
52 case 1: return "RCX";
53 case 2: return "RDX";
54 case 3: return "RBX";
55 case 4: return "RSP";
56 case 5: return "RBP";
57 case 6: return "RSI";
58 case 7: return "RDI";
59 case 8: return "R8";
60 case 9: return "R9";
61 case 10: return "R10";
62 case 11: return "R11";
63 case 12: return "R12";
64 case 13: return "R13";
65 case 14: return "R14";
66 case 15: return "R15";
67 }
68 }
69
70 // Calculates the number of array slots required for the unwind code.
71 static unsigned getNumUsedSlots(const UnwindCode &UnwindCode) {
72 switch (UnwindCode.getUnwindOp()) {
73 default: llvm_unreachable("Invalid unwind code");
74 case UOP_PushNonVol:
75 case UOP_AllocSmall:
76 case UOP_SetFPReg:
77 case UOP_PushMachFrame:
78 return 1;
79 case UOP_SaveNonVol:
80 case UOP_SaveXMM128:
81 return 2;
82 case UOP_SaveNonVolBig:
83 case UOP_SaveXMM128Big:
84 return 3;
85 case UOP_AllocLarge:
86 return (UnwindCode.getOpInfo() == 0) ? 2 : 3;
87 }
88 }
89
90 // Prints one unwind code. Because an unwind code can occupy up to 3 slots in
91 // the unwind codes array, this function requires that the correct number of
92 // slots is provided.
93 static void printUnwindCode(ArrayRef<UnwindCode> UCs) {
94 assert(UCs.size() >= getNumUsedSlots(UCs[0]));
95 outs() << format(" 0x%02x: ", unsigned(UCs[0].u.CodeOffset))
96 << getUnwindCodeTypeName(UCs[0].getUnwindOp());
97 switch (UCs[0].getUnwindOp()) {
98 case UOP_PushNonVol:
99 outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo());
100 break;
101 case UOP_AllocLarge:
102 if (UCs[0].getOpInfo() == 0) {
103 outs() << " " << UCs[1].FrameOffset;
104 } else {
105 outs() << " " << UCs[1].FrameOffset
106 + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16);
107 }
108 break;
109 case UOP_AllocSmall:
110 outs() << " " << ((UCs[0].getOpInfo() + 1) * 8);
111 break;
112 case UOP_SetFPReg:
113 outs() << " ";
114 break;
115 case UOP_SaveNonVol:
116 outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo())
117 << format(" [0x%04x]", 8 * UCs[1].FrameOffset);
118 break;
119 case UOP_SaveNonVolBig:
120 outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo())
121 << format(" [0x%08x]", UCs[1].FrameOffset
122 + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16));
123 break;
124 case UOP_SaveXMM128:
125 outs() << " XMM" << static_cast<uint32_t>(UCs[0].getOpInfo())
126 << format(" [0x%04x]", 16 * UCs[1].FrameOffset);
127 break;
128 case UOP_SaveXMM128Big:
129 outs() << " XMM" << UCs[0].getOpInfo()
130 << format(" [0x%08x]", UCs[1].FrameOffset
131 + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16));
132 break;
133 case UOP_PushMachFrame:
134 outs() << " " << (UCs[0].getOpInfo() ? "w/o" : "w")
135 << " error code";
136 break;
137 }
138 outs() << "\n";
139 }
140
141 static void printAllUnwindCodes(ArrayRef<UnwindCode> UCs) {
142 for (const UnwindCode *I = UCs.begin(), *E = UCs.end(); I < E; ) {
143 unsigned UsedSlots = getNumUsedSlots(*I);
144 if (UsedSlots > UCs.size()) {
145 outs() << "Unwind data corrupted: Encountered unwind op "
146 << getUnwindCodeTypeName((*I).getUnwindOp())
147 << " which requires " << UsedSlots
148 << " slots, but only " << UCs.size()
149 << " remaining in buffer";
150 return ;
151 }
152 printUnwindCode(makeArrayRef(I, E));
153 I += UsedSlots;
154 }
155 }
156
157 // Given a symbol sym this functions returns the address and section of it.
158 static Error resolveSectionAndAddress(const COFFObjectFile *Obj,
159 const SymbolRef &Sym,
160 const coff_section *&ResolvedSection,
161 uint64_t &ResolvedAddr) {
162 Expected<uint64_t> ResolvedAddrOrErr = Sym.getAddress();
163 if (!ResolvedAddrOrErr)
164 return ResolvedAddrOrErr.takeError();
165 ResolvedAddr = *ResolvedAddrOrErr;
166 Expected<section_iterator> Iter = Sym.getSection();
167 if (!Iter)
168 return Iter.takeError();
169 ResolvedSection = Obj->getCOFFSection(**Iter);
170 return Error::success();
171 }
172
173 // Given a vector of relocations for a section and an offset into this section
174 // the function returns the symbol used for the relocation at the offset.
175 static Error resolveSymbol(const std::vector<RelocationRef> &Rels,
176 uint64_t Offset, SymbolRef &Sym) {
177 for (auto &R : Rels) {
178 uint64_t Ofs = R.getOffset();
179 if (Ofs == Offset) {
180 Sym = *R.getSymbol();
181 return Error::success();
182 }
183 }
184 return make_error<BinaryError>();
185 }
186
187 // Given a vector of relocations for a section and an offset into this section
188 // the function resolves the symbol used for the relocation at the offset and
189 // returns the section content and the address inside the content pointed to
190 // by the symbol.
191 static Error
192 getSectionContents(const COFFObjectFile *Obj,
193 const std::vector<RelocationRef> &Rels, uint64_t Offset,
194 ArrayRef<uint8_t> &Contents, uint64_t &Addr) {
195 SymbolRef Sym;
196 if (Error E = resolveSymbol(Rels, Offset, Sym))
197 return E;
198 const coff_section *Section;
199 if (Error E = resolveSectionAndAddress(Obj, Sym, Section, Addr))
200 return E;
201 return Obj->getSectionContents(Section, Contents);
202 }
203
204 // Given a vector of relocations for a section and an offset into this section
205 // the function returns the name of the symbol used for the relocation at the
206 // offset.
207 static Error resolveSymbolName(const std::vector<RelocationRef> &Rels,
208 uint64_t Offset, StringRef &Name) {
209 SymbolRef Sym;
210 if (Error EC = resolveSymbol(Rels, Offset, Sym))
211 return EC;
212 Expected<StringRef> NameOrErr = Sym.getName();
213 if (!NameOrErr)
214 return NameOrErr.takeError();
215 Name = *NameOrErr;
216 return Error::success();
217 }
218
219 static void printCOFFSymbolAddress(raw_ostream &Out,
220 const std::vector<RelocationRef> &Rels,
221 uint64_t Offset, uint32_t Disp) {
222 StringRef Sym;
223 if (!resolveSymbolName(Rels, Offset, Sym)) {
224 Out << Sym;
225 if (Disp > 0)
226 Out << format(" + 0x%04x", Disp);
227 } else {
228 Out << format("0x%04x", Disp);
229 }
230 }
231
232 static void
233 printSEHTable(const COFFObjectFile *Obj, uint32_t TableVA, int Count) {
234 if (Count == 0)
235 return;
236
237 const pe32_header *PE32Header;
238 error(Obj->getPE32Header(PE32Header));
239 uint32_t ImageBase = PE32Header->ImageBase;
240 uintptr_t IntPtr = 0;
241 error(Obj->getVaPtr(TableVA, IntPtr));
242 const support::ulittle32_t *P = (const support::ulittle32_t *)IntPtr;
243 outs() << "SEH Table:";
244 for (int I = 0; I < Count; ++I)
245 outs() << format(" 0x%x", P[I] + ImageBase);
246 outs() << "\n\n";
247 }
248
249 template <typename T>
250 static void printTLSDirectoryT(const coff_tls_directory<T> *TLSDir) {
251 size_t FormatWidth = sizeof(T) * 2;
252 outs() << "TLS directory:"
253 << "\n StartAddressOfRawData: "
254 << format_hex(TLSDir->StartAddressOfRawData, FormatWidth)
255 << "\n EndAddressOfRawData: "
256 << format_hex(TLSDir->EndAddressOfRawData, FormatWidth)
257 << "\n AddressOfIndex: "
258 << format_hex(TLSDir->AddressOfIndex, FormatWidth)
259 << "\n AddressOfCallBacks: "
260 << format_hex(TLSDir->AddressOfCallBacks, FormatWidth)
261 << "\n SizeOfZeroFill: "
262 << TLSDir->SizeOfZeroFill
263 << "\n Characteristics: "
264 << TLSDir->Characteristics
265 << "\n Alignment: "
266 << TLSDir->getAlignment()
267 << "\n\n";
268 }
269
270 static void printTLSDirectory(const COFFObjectFile *Obj) {
271 const pe32_header *PE32Header;
272 error(Obj->getPE32Header(PE32Header));
273
274 const pe32plus_header *PE32PlusHeader;
275 error(Obj->getPE32PlusHeader(PE32PlusHeader));
276
277 // Skip if it's not executable.
278 if (!PE32Header && !PE32PlusHeader)
279 return;
280
281 const data_directory *DataDir;
282 error(Obj->getDataDirectory(COFF::TLS_TABLE, DataDir));
283 uintptr_t IntPtr = 0;
284 if (DataDir->RelativeVirtualAddress == 0)
285 return;
286 error(Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr));
287
288 if (PE32Header) {
289 auto *TLSDir = reinterpret_cast<const coff_tls_directory32 *>(IntPtr);
290 printTLSDirectoryT(TLSDir);
291 } else {
292 auto *TLSDir = reinterpret_cast<const coff_tls_directory64 *>(IntPtr);
293 printTLSDirectoryT(TLSDir);
294 }
295
296 outs() << "\n";
297 }
298
299 static void printLoadConfiguration(const COFFObjectFile *Obj) {
300 // Skip if it's not executable.
301 const pe32_header *PE32Header;
302 error(Obj->getPE32Header(PE32Header));
303 if (!PE32Header)
304 return;
305
306 // Currently only x86 is supported
307 if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_I386)
308 return;
309
310 const data_directory *DataDir;
311 error(Obj->getDataDirectory(COFF::LOAD_CONFIG_TABLE, DataDir));
312 uintptr_t IntPtr = 0;
313 if (DataDir->RelativeVirtualAddress == 0)
314 return;
315 error(Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr));
316
317 auto *LoadConf = reinterpret_cast<const coff_load_configuration32 *>(IntPtr);
318 outs() << "Load configuration:"
319 << "\n Timestamp: " << LoadConf->TimeDateStamp
320 << "\n Major Version: " << LoadConf->MajorVersion
321 << "\n Minor Version: " << LoadConf->MinorVersion
322 << "\n GlobalFlags Clear: " << LoadConf->GlobalFlagsClear
323 << "\n GlobalFlags Set: " << LoadConf->GlobalFlagsSet
324 << "\n Critical Section Default Timeout: " << LoadConf->CriticalSectionDefaultTimeout
325 << "\n Decommit Free Block Threshold: " << LoadConf->DeCommitFreeBlockThreshold
326 << "\n Decommit Total Free Threshold: " << LoadConf->DeCommitTotalFreeThreshold
327 << "\n Lock Prefix Table: " << LoadConf->LockPrefixTable
328 << "\n Maximum Allocation Size: " << LoadConf->MaximumAllocationSize
329 << "\n Virtual Memory Threshold: " << LoadConf->VirtualMemoryThreshold
330 << "\n Process Affinity Mask: " << LoadConf->ProcessAffinityMask
331 << "\n Process Heap Flags: " << LoadConf->ProcessHeapFlags
332 << "\n CSD Version: " << LoadConf->CSDVersion
333 << "\n Security Cookie: " << LoadConf->SecurityCookie
334 << "\n SEH Table: " << LoadConf->SEHandlerTable
335 << "\n SEH Count: " << LoadConf->SEHandlerCount
336 << "\n\n";
337 printSEHTable(Obj, LoadConf->SEHandlerTable, LoadConf->SEHandlerCount);
338 outs() << "\n";
339 }
340
341 // Prints import tables. The import table is a table containing the list of
342 // DLL name and symbol names which will be linked by the loader.
343 static void printImportTables(const COFFObjectFile *Obj) {
344 import_directory_iterator I = Obj->import_directory_begin();
345 import_directory_iterator E = Obj->import_directory_end();
346 if (I == E)
347 return;
348 outs() << "The Import Tables:\n";
349 for (const ImportDirectoryEntryRef &DirRef : Obj->import_directories()) {
350 const coff_import_directory_table_entry *Dir;
351 StringRef Name;
352 if (DirRef.getImportTableEntry(Dir)) return;
353 if (DirRef.getName(Name)) return;
354
355 outs() << format(" lookup %08x time %08x fwd %08x name %08x addr %08x\n\n",
356 static_cast<uint32_t>(Dir->ImportLookupTableRVA),
357 static_cast<uint32_t>(Dir->TimeDateStamp),
358 static_cast<uint32_t>(Dir->ForwarderChain),
359 static_cast<uint32_t>(Dir->NameRVA),
360 static_cast<uint32_t>(Dir->ImportAddressTableRVA));
361 outs() << " DLL Name: " << Name << "\n";
362 outs() << " Hint/Ord Name\n";
363 for (const ImportedSymbolRef &Entry : DirRef.imported_symbols()) {
364 bool IsOrdinal;
365 if (Entry.isOrdinal(IsOrdinal))
366 return;
367 if (IsOrdinal) {
368 uint16_t Ordinal;
369 if (Entry.getOrdinal(Ordinal))
370 return;
371 outs() << format(" % 6d\n", Ordinal);
372 continue;
373 }
374 uint32_t HintNameRVA;
375 if (Entry.getHintNameRVA(HintNameRVA))
376 return;
377 uint16_t Hint;
378 StringRef Name;
379 if (Obj->getHintName(HintNameRVA, Hint, Name))
380 return;
381 outs() << format(" % 6d ", Hint) << Name << "\n";
382 }
383 outs() << "\n";
384 }
385 }
386
387 // Prints export tables. The export table is a table containing the list of
388 // exported symbol from the DLL.
389 static void printExportTable(const COFFObjectFile *Obj) {
390 outs() << "Export Table:\n";
391 export_directory_iterator I = Obj->export_directory_begin();
392 export_directory_iterator E = Obj->export_directory_end();
393 if (I == E)
394 return;
395 StringRef DllName;
396 uint32_t OrdinalBase;
397 if (I->getDllName(DllName))
398 return;
399 if (I->getOrdinalBase(OrdinalBase))
400 return;
401 outs() << " DLL name: " << DllName << "\n";
402 outs() << " Ordinal base: " << OrdinalBase << "\n";
403 outs() << " Ordinal RVA Name\n";
404 for (; I != E; I = ++I) {
405 uint32_t Ordinal;
406 if (I->getOrdinal(Ordinal))
407 return;
408 uint32_t RVA;
409 if (I->getExportRVA(RVA))
410 return;
411 bool IsForwarder;
412 if (I->isForwarder(IsForwarder))
413 return;
414
415 if (IsForwarder) {
416 // Export table entries can be used to re-export symbols that
417 // this COFF file is imported from some DLLs. This is rare.
418 // In most cases IsForwarder is false.
419 outs() << format(" % 4d ", Ordinal);
420 } else {
421 outs() << format(" % 4d %# 8x", Ordinal, RVA);
422 }
423
424 StringRef Name;
425 if (I->getSymbolName(Name))
426 continue;
427 if (!Name.empty())
428 outs() << " " << Name;
429 if (IsForwarder) {
430 StringRef S;
431 if (I->getForwardTo(S))
432 return;
433 outs() << " (forwarded to " << S << ")";
434 }
435 outs() << "\n";
436 }
437 }
438
439 // Given the COFF object file, this function returns the relocations for .pdata
440 // and the pointer to "runtime function" structs.
441 static bool getPDataSection(const COFFObjectFile *Obj,
442 std::vector<RelocationRef> &Rels,
443 const RuntimeFunction *&RFStart, int &NumRFs) {
444 for (const SectionRef &Section : Obj->sections()) {
445 StringRef Name;
446 error(Section.getName(Name));
447 if (Name != ".pdata")
448 continue;
449
450 const coff_section *Pdata = Obj->getCOFFSection(Section);
451 for (const RelocationRef &Reloc : Section.relocations())
452 Rels.push_back(Reloc);
453
454 // Sort relocations by address.
455 llvm::sort(Rels, isRelocAddressLess);
456
457 ArrayRef<uint8_t> Contents;
458 error(Obj->getSectionContents(Pdata, Contents));
459 if (Contents.empty())
460 continue;
461
462 RFStart = reinterpret_cast<const RuntimeFunction *>(Contents.data());
463 NumRFs = Contents.size() / sizeof(RuntimeFunction);
464 return true;
465 }
466 return false;
467 }
468
469 Error getCOFFRelocationValueString(const COFFObjectFile *Obj,
470 const RelocationRef &Rel,
471 SmallVectorImpl<char> &Result) {
472 symbol_iterator SymI = Rel.getSymbol();
473 Expected<StringRef> SymNameOrErr = SymI->getName();
474 if (!SymNameOrErr)
475 return SymNameOrErr.takeError();
476 StringRef SymName = *SymNameOrErr;
477 Result.append(SymName.begin(), SymName.end());
478 return Error::success();
479 }
480
481 static void printWin64EHUnwindInfo(const Win64EH::UnwindInfo *UI) {
482 // The casts to int are required in order to output the value as number.
483 // Without the casts the value would be interpreted as char data (which
484 // results in garbage output).
485 outs() << " Version: " << static_cast<int>(UI->getVersion()) << "\n";
486 outs() << " Flags: " << static_cast<int>(UI->getFlags());
487 if (UI->getFlags()) {
488 if (UI->getFlags() & UNW_ExceptionHandler)
489 outs() << " UNW_ExceptionHandler";
490 if (UI->getFlags() & UNW_TerminateHandler)
491 outs() << " UNW_TerminateHandler";
492 if (UI->getFlags() & UNW_ChainInfo)
493 outs() << " UNW_ChainInfo";
494 }
495 outs() << "\n";
496 outs() << " Size of prolog: " << static_cast<int>(UI->PrologSize) << "\n";
497 outs() << " Number of Codes: " << static_cast<int>(UI->NumCodes) << "\n";
498 // Maybe this should move to output of UOP_SetFPReg?
499 if (UI->getFrameRegister()) {
500 outs() << " Frame register: "
501 << getUnwindRegisterName(UI->getFrameRegister()) << "\n";
502 outs() << " Frame offset: " << 16 * UI->getFrameOffset() << "\n";
503 } else {
504 outs() << " No frame pointer used\n";
505 }
506 if (UI->getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) {
507 // FIXME: Output exception handler data
508 } else if (UI->getFlags() & UNW_ChainInfo) {
509 // FIXME: Output chained unwind info
510 }
511
512 if (UI->NumCodes)
513 outs() << " Unwind Codes:\n";
514
515 printAllUnwindCodes(makeArrayRef(&UI->UnwindCodes[0], UI->NumCodes));
516
517 outs() << "\n";
518 outs().flush();
519 }
520
521 /// Prints out the given RuntimeFunction struct for x64, assuming that Obj is
522 /// pointing to an executable file.
523 static void printRuntimeFunction(const COFFObjectFile *Obj,
524 const RuntimeFunction &RF) {
525 if (!RF.StartAddress)
526 return;
527 outs() << "Function Table:\n"
528 << format(" Start Address: 0x%04x\n",
529 static_cast<uint32_t>(RF.StartAddress))
530 << format(" End Address: 0x%04x\n",
531 static_cast<uint32_t>(RF.EndAddress))
532 << format(" Unwind Info Address: 0x%04x\n",
533 static_cast<uint32_t>(RF.UnwindInfoOffset));
534 uintptr_t addr;
535 if (Obj->getRvaPtr(RF.UnwindInfoOffset, addr))
536 return;
537 printWin64EHUnwindInfo(reinterpret_cast<const Win64EH::UnwindInfo *>(addr));
538 }
539
540 /// Prints out the given RuntimeFunction struct for x64, assuming that Obj is
541 /// pointing to an object file. Unlike executable, fields in RuntimeFunction
542 /// struct are filled with zeros, but instead there are relocations pointing to
543 /// them so that the linker will fill targets' RVAs to the fields at link
544 /// time. This function interprets the relocations to find the data to be used
545 /// in the resulting executable.
546 static void printRuntimeFunctionRels(const COFFObjectFile *Obj,
547 const RuntimeFunction &RF,
548 uint64_t SectionOffset,
549 const std::vector<RelocationRef> &Rels) {
550 outs() << "Function Table:\n";
551 outs() << " Start Address: ";
552 printCOFFSymbolAddress(outs(), Rels,
553 SectionOffset +
554 /*offsetof(RuntimeFunction, StartAddress)*/ 0,
555 RF.StartAddress);
556 outs() << "\n";
557
558 outs() << " End Address: ";
559 printCOFFSymbolAddress(outs(), Rels,
560 SectionOffset +
561 /*offsetof(RuntimeFunction, EndAddress)*/ 4,
562 RF.EndAddress);
563 outs() << "\n";
564
565 outs() << " Unwind Info Address: ";
566 printCOFFSymbolAddress(outs(), Rels,
567 SectionOffset +
568 /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
569 RF.UnwindInfoOffset);
570 outs() << "\n";
571
572 ArrayRef<uint8_t> XContents;
573 uint64_t UnwindInfoOffset = 0;
574 error(getSectionContents(
575 Obj, Rels, SectionOffset +
576 /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
577 XContents, UnwindInfoOffset));
578 if (XContents.empty())
579 return;
580
581 UnwindInfoOffset += RF.UnwindInfoOffset;
582 if (UnwindInfoOffset > XContents.size())
583 return;
584
585 auto *UI = reinterpret_cast<const Win64EH::UnwindInfo *>(XContents.data() +
586 UnwindInfoOffset);
587 printWin64EHUnwindInfo(UI);
588 }
589
590 void printCOFFUnwindInfo(const COFFObjectFile *Obj) {
591 if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_AMD64) {
592 WithColor::error(errs(), "llvm-objdump")
593 << "unsupported image machine type "
594 "(currently only AMD64 is supported).\n";
595 return;
596 }
597
598 std::vector<RelocationRef> Rels;
599 const RuntimeFunction *RFStart;
600 int NumRFs;
601 if (!getPDataSection(Obj, Rels, RFStart, NumRFs))
602 return;
603 ArrayRef<RuntimeFunction> RFs(RFStart, NumRFs);
604
605 bool IsExecutable = Rels.empty();
606 if (IsExecutable) {
607 for (const RuntimeFunction &RF : RFs)
608 printRuntimeFunction(Obj, RF);
609 return;
610 }
611
612 for (const RuntimeFunction &RF : RFs) {
613 uint64_t SectionOffset =
614 std::distance(RFs.begin(), &RF) * sizeof(RuntimeFunction);
615 printRuntimeFunctionRels(Obj, RF, SectionOffset, Rels);
616 }
617 }
618
619 void printCOFFFileHeader(const object::ObjectFile *Obj) {
620 const COFFObjectFile *file = dyn_cast<const COFFObjectFile>(Obj);
621 printTLSDirectory(file);
622 printLoadConfiguration(file);
623 printImportTables(file);
624 printExportTable(file);
625 }
626
627 void printCOFFSymbolTable(const object::COFFImportFile *i) {
628 unsigned Index = 0;
629 bool IsCode = i->getCOFFImportHeader()->getType() == COFF::IMPORT_CODE;
630
631 for (const object::BasicSymbolRef &Sym : i->symbols()) {
632 std::string Name;
633 raw_string_ostream NS(Name);
634
635 cantFail(Sym.printName(NS));
636 NS.flush();
637
638 outs() << "[" << format("%2d", Index) << "]"
639 << "(sec " << format("%2d", 0) << ")"
640 << "(fl 0x00)" // Flag bits, which COFF doesn't have.
641 << "(ty " << format("%3x", (IsCode && Index) ? 32 : 0) << ")"
642 << "(scl " << format("%3x", 0) << ") "
643 << "(nx " << 0 << ") "
644 << "0x" << format("%08x", 0) << " " << Name << '\n';
645
646 ++Index;
647 }
648 }
649
650 void printCOFFSymbolTable(const COFFObjectFile *coff) {
651 for (unsigned SI = 0, SE = coff->getNumberOfSymbols(); SI != SE; ++SI) {
652 Expected<COFFSymbolRef> Symbol = coff->getSymbol(SI);
653 StringRef Name;
654 error(Symbol.takeError());
655 error(coff->getSymbolName(*Symbol, Name));
656
657 outs() << "[" << format("%2d", SI) << "]"
658 << "(sec " << format("%2d", int(Symbol->getSectionNumber())) << ")"
659 << "(fl 0x00)" // Flag bits, which COFF doesn't have.
660 << "(ty " << format("%3x", unsigned(Symbol->getType())) << ")"
661 << "(scl " << format("%3x", unsigned(Symbol->getStorageClass()))
662 << ") "
663 << "(nx " << unsigned(Symbol->getNumberOfAuxSymbols()) << ") "
664 << "0x" << format("%08x", unsigned(Symbol->getValue())) << " "
665 << Name;
666 if (Demangle && Name.startswith("?")) {
667 char *DemangledSymbol = nullptr;
668 size_t Size = 0;
669 int Status = -1;
670 DemangledSymbol =
671 microsoftDemangle(Name.data(), DemangledSymbol, &Size, &Status);
672
673 if (Status == 0 && DemangledSymbol) {
674 outs() << " (" << StringRef(DemangledSymbol) << ")";
675 std::free(DemangledSymbol);
676 } else {
677 outs() << " (invalid mangled name)";
678 }
679 }
680 outs() << "\n";
681
682 for (unsigned AI = 0, AE = Symbol->getNumberOfAuxSymbols(); AI < AE; ++AI, ++SI) {
683 if (Symbol->isSectionDefinition()) {
684 const coff_aux_section_definition *asd;
685 error(coff->getAuxSymbol<coff_aux_section_definition>(SI + 1, asd));
686
687 int32_t AuxNumber = asd->getNumber(Symbol->isBigObj());
688
689 outs() << "AUX "
690 << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x "
691 , unsigned(asd->Length)
692 , unsigned(asd->NumberOfRelocations)
693 , unsigned(asd->NumberOfLinenumbers)
694 , unsigned(asd->CheckSum))
695 << format("assoc %d comdat %d\n"
696 , unsigned(AuxNumber)
697 , unsigned(asd->Selection));
698 } else if (Symbol->isFileRecord()) {
699 const char *FileName;
700 error(coff->getAuxSymbol<char>(SI + 1, FileName));
701
702 StringRef Name(FileName, Symbol->getNumberOfAuxSymbols() *
703 coff->getSymbolTableEntrySize());
704 outs() << "AUX " << Name.rtrim(StringRef("\0", 1)) << '\n';
705
706 SI = SI + Symbol->getNumberOfAuxSymbols();
707 break;
708 } else if (Symbol->isWeakExternal()) {
709 const coff_aux_weak_external *awe;
710 error(coff->getAuxSymbol<coff_aux_weak_external>(SI + 1, awe));
711
712 outs() << "AUX " << format("indx %d srch %d\n",
713 static_cast<uint32_t>(awe->TagIndex),
714 static_cast<uint32_t>(awe->Characteristics));
715 } else {
716 outs() << "AUX Unknown\n";
717 }
718 }
719 }
720 }
721 } // namespace llvm
The low level virtual machine