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[MIParser] Set RegClassOrRegBank during instruction parsing
[llvm-complete.git] / tools / llvm-objdump / COFFDump.cpp
blob60b0f5a3cbd15f91a72e99c198e08ee420d019e7
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 uintptr_t IntPtr = 0;
238 if (std::error_code EC = Obj->getVaPtr(TableVA, IntPtr))
239 reportError(errorCodeToError(EC), Obj->getFileName());
240
241 const support::ulittle32_t *P = (const support::ulittle32_t *)IntPtr;
242 outs() << "SEH Table:";
243 for (int I = 0; I < Count; ++I)
244 outs() << format(" 0x%x", P[I] + Obj->getPE32Header()->ImageBase);
245 outs() << "\n\n";
246 }
247
248 template <typename T>
249 static void printTLSDirectoryT(const coff_tls_directory<T> *TLSDir) {
250 size_t FormatWidth = sizeof(T) * 2;
251 outs() << "TLS directory:"
252 << "\n StartAddressOfRawData: "
253 << format_hex(TLSDir->StartAddressOfRawData, FormatWidth)
254 << "\n EndAddressOfRawData: "
255 << format_hex(TLSDir->EndAddressOfRawData, FormatWidth)
256 << "\n AddressOfIndex: "
257 << format_hex(TLSDir->AddressOfIndex, FormatWidth)
258 << "\n AddressOfCallBacks: "
259 << format_hex(TLSDir->AddressOfCallBacks, FormatWidth)
260 << "\n SizeOfZeroFill: "
261 << TLSDir->SizeOfZeroFill
262 << "\n Characteristics: "
263 << TLSDir->Characteristics
264 << "\n Alignment: "
265 << TLSDir->getAlignment()
266 << "\n\n";
267 }
268
269 static void printTLSDirectory(const COFFObjectFile *Obj) {
270 const pe32_header *PE32Header = Obj->getPE32Header();
271 const pe32plus_header *PE32PlusHeader = Obj->getPE32PlusHeader();
272
273 // Skip if it's not executable.
274 if (!PE32Header && !PE32PlusHeader)
275 return;
276
277 const data_directory *DataDir;
278 if (std::error_code EC = Obj->getDataDirectory(COFF::TLS_TABLE, DataDir))
279 reportError(errorCodeToError(EC), Obj->getFileName());
280
281 if (DataDir->RelativeVirtualAddress == 0)
282 return;
283
284 uintptr_t IntPtr = 0;
285 if (std::error_code EC =
286 Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr))
287 reportError(errorCodeToError(EC), Obj->getFileName());
288
289 if (PE32Header) {
290 auto *TLSDir = reinterpret_cast<const coff_tls_directory32 *>(IntPtr);
291 printTLSDirectoryT(TLSDir);
292 } else {
293 auto *TLSDir = reinterpret_cast<const coff_tls_directory64 *>(IntPtr);
294 printTLSDirectoryT(TLSDir);
295 }
296
297 outs() << "\n";
298 }
299
300 static void printLoadConfiguration(const COFFObjectFile *Obj) {
301 // Skip if it's not executable.
302 if (!Obj->getPE32Header())
303 return;
304
305 // Currently only x86 is supported
306 if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_I386)
307 return;
308
309 const data_directory *DataDir;
310
311 if (std::error_code EC =
312 Obj->getDataDirectory(COFF::LOAD_CONFIG_TABLE, DataDir))
313 reportError(errorCodeToError(EC), Obj->getFileName());
314
315 uintptr_t IntPtr = 0;
316 if (DataDir->RelativeVirtualAddress == 0)
317 return;
318
319 if (std::error_code EC =
320 Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr))
321 reportError(errorCodeToError(EC), Obj->getFileName());
322
323 auto *LoadConf = reinterpret_cast<const coff_load_configuration32 *>(IntPtr);
324 outs() << "Load configuration:"
325 << "\n Timestamp: " << LoadConf->TimeDateStamp
326 << "\n Major Version: " << LoadConf->MajorVersion
327 << "\n Minor Version: " << LoadConf->MinorVersion
328 << "\n GlobalFlags Clear: " << LoadConf->GlobalFlagsClear
329 << "\n GlobalFlags Set: " << LoadConf->GlobalFlagsSet
330 << "\n Critical Section Default Timeout: " << LoadConf->CriticalSectionDefaultTimeout
331 << "\n Decommit Free Block Threshold: " << LoadConf->DeCommitFreeBlockThreshold
332 << "\n Decommit Total Free Threshold: " << LoadConf->DeCommitTotalFreeThreshold
333 << "\n Lock Prefix Table: " << LoadConf->LockPrefixTable
334 << "\n Maximum Allocation Size: " << LoadConf->MaximumAllocationSize
335 << "\n Virtual Memory Threshold: " << LoadConf->VirtualMemoryThreshold
336 << "\n Process Affinity Mask: " << LoadConf->ProcessAffinityMask
337 << "\n Process Heap Flags: " << LoadConf->ProcessHeapFlags
338 << "\n CSD Version: " << LoadConf->CSDVersion
339 << "\n Security Cookie: " << LoadConf->SecurityCookie
340 << "\n SEH Table: " << LoadConf->SEHandlerTable
341 << "\n SEH Count: " << LoadConf->SEHandlerCount
342 << "\n\n";
343 printSEHTable(Obj, LoadConf->SEHandlerTable, LoadConf->SEHandlerCount);
344 outs() << "\n";
345 }
346
347 // Prints import tables. The import table is a table containing the list of
348 // DLL name and symbol names which will be linked by the loader.
349 static void printImportTables(const COFFObjectFile *Obj) {
350 import_directory_iterator I = Obj->import_directory_begin();
351 import_directory_iterator E = Obj->import_directory_end();
352 if (I == E)
353 return;
354 outs() << "The Import Tables:\n";
355 for (const ImportDirectoryEntryRef &DirRef : Obj->import_directories()) {
356 const coff_import_directory_table_entry *Dir;
357 StringRef Name;
358 if (DirRef.getImportTableEntry(Dir)) return;
359 if (DirRef.getName(Name)) return;
360
361 outs() << format(" lookup %08x time %08x fwd %08x name %08x addr %08x\n\n",
362 static_cast<uint32_t>(Dir->ImportLookupTableRVA),
363 static_cast<uint32_t>(Dir->TimeDateStamp),
364 static_cast<uint32_t>(Dir->ForwarderChain),
365 static_cast<uint32_t>(Dir->NameRVA),
366 static_cast<uint32_t>(Dir->ImportAddressTableRVA));
367 outs() << " DLL Name: " << Name << "\n";
368 outs() << " Hint/Ord Name\n";
369 for (const ImportedSymbolRef &Entry : DirRef.imported_symbols()) {
370 bool IsOrdinal;
371 if (Entry.isOrdinal(IsOrdinal))
372 return;
373 if (IsOrdinal) {
374 uint16_t Ordinal;
375 if (Entry.getOrdinal(Ordinal))
376 return;
377 outs() << format(" % 6d\n", Ordinal);
378 continue;
379 }
380 uint32_t HintNameRVA;
381 if (Entry.getHintNameRVA(HintNameRVA))
382 return;
383 uint16_t Hint;
384 StringRef Name;
385 if (Obj->getHintName(HintNameRVA, Hint, Name))
386 return;
387 outs() << format(" % 6d ", Hint) << Name << "\n";
388 }
389 outs() << "\n";
390 }
391 }
392
393 // Prints export tables. The export table is a table containing the list of
394 // exported symbol from the DLL.
395 static void printExportTable(const COFFObjectFile *Obj) {
396 outs() << "Export Table:\n";
397 export_directory_iterator I = Obj->export_directory_begin();
398 export_directory_iterator E = Obj->export_directory_end();
399 if (I == E)
400 return;
401 StringRef DllName;
402 uint32_t OrdinalBase;
403 if (I->getDllName(DllName))
404 return;
405 if (I->getOrdinalBase(OrdinalBase))
406 return;
407 outs() << " DLL name: " << DllName << "\n";
408 outs() << " Ordinal base: " << OrdinalBase << "\n";
409 outs() << " Ordinal RVA Name\n";
410 for (; I != E; I = ++I) {
411 uint32_t Ordinal;
412 if (I->getOrdinal(Ordinal))
413 return;
414 uint32_t RVA;
415 if (I->getExportRVA(RVA))
416 return;
417 bool IsForwarder;
418 if (I->isForwarder(IsForwarder))
419 return;
420
421 if (IsForwarder) {
422 // Export table entries can be used to re-export symbols that
423 // this COFF file is imported from some DLLs. This is rare.
424 // In most cases IsForwarder is false.
425 outs() << format(" % 4d ", Ordinal);
426 } else {
427 outs() << format(" % 4d %# 8x", Ordinal, RVA);
428 }
429
430 StringRef Name;
431 if (I->getSymbolName(Name))
432 continue;
433 if (!Name.empty())
434 outs() << " " << Name;
435 if (IsForwarder) {
436 StringRef S;
437 if (I->getForwardTo(S))
438 return;
439 outs() << " (forwarded to " << S << ")";
440 }
441 outs() << "\n";
442 }
443 }
444
445 // Given the COFF object file, this function returns the relocations for .pdata
446 // and the pointer to "runtime function" structs.
447 static bool getPDataSection(const COFFObjectFile *Obj,
448 std::vector<RelocationRef> &Rels,
449 const RuntimeFunction *&RFStart, int &NumRFs) {
450 for (const SectionRef &Section : Obj->sections()) {
451 StringRef Name = unwrapOrError(Section.getName(), Obj->getFileName());
452 if (Name != ".pdata")
453 continue;
454
455 const coff_section *Pdata = Obj->getCOFFSection(Section);
456 for (const RelocationRef &Reloc : Section.relocations())
457 Rels.push_back(Reloc);
458
459 // Sort relocations by address.
460 llvm::sort(Rels, isRelocAddressLess);
461
462 ArrayRef<uint8_t> Contents;
463 if (Error E = Obj->getSectionContents(Pdata, Contents))
464 reportError(std::move(E), Obj->getFileName());
465
466 if (Contents.empty())
467 continue;
468
469 RFStart = reinterpret_cast<const RuntimeFunction *>(Contents.data());
470 NumRFs = Contents.size() / sizeof(RuntimeFunction);
471 return true;
472 }
473 return false;
474 }
475
476 Error getCOFFRelocationValueString(const COFFObjectFile *Obj,
477 const RelocationRef &Rel,
478 SmallVectorImpl<char> &Result) {
479 symbol_iterator SymI = Rel.getSymbol();
480 Expected<StringRef> SymNameOrErr = SymI->getName();
481 if (!SymNameOrErr)
482 return SymNameOrErr.takeError();
483 StringRef SymName = *SymNameOrErr;
484 Result.append(SymName.begin(), SymName.end());
485 return Error::success();
486 }
487
488 static void printWin64EHUnwindInfo(const Win64EH::UnwindInfo *UI) {
489 // The casts to int are required in order to output the value as number.
490 // Without the casts the value would be interpreted as char data (which
491 // results in garbage output).
492 outs() << " Version: " << static_cast<int>(UI->getVersion()) << "\n";
493 outs() << " Flags: " << static_cast<int>(UI->getFlags());
494 if (UI->getFlags()) {
495 if (UI->getFlags() & UNW_ExceptionHandler)
496 outs() << " UNW_ExceptionHandler";
497 if (UI->getFlags() & UNW_TerminateHandler)
498 outs() << " UNW_TerminateHandler";
499 if (UI->getFlags() & UNW_ChainInfo)
500 outs() << " UNW_ChainInfo";
501 }
502 outs() << "\n";
503 outs() << " Size of prolog: " << static_cast<int>(UI->PrologSize) << "\n";
504 outs() << " Number of Codes: " << static_cast<int>(UI->NumCodes) << "\n";
505 // Maybe this should move to output of UOP_SetFPReg?
506 if (UI->getFrameRegister()) {
507 outs() << " Frame register: "
508 << getUnwindRegisterName(UI->getFrameRegister()) << "\n";
509 outs() << " Frame offset: " << 16 * UI->getFrameOffset() << "\n";
510 } else {
511 outs() << " No frame pointer used\n";
512 }
513 if (UI->getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) {
514 // FIXME: Output exception handler data
515 } else if (UI->getFlags() & UNW_ChainInfo) {
516 // FIXME: Output chained unwind info
517 }
518
519 if (UI->NumCodes)
520 outs() << " Unwind Codes:\n";
521
522 printAllUnwindCodes(makeArrayRef(&UI->UnwindCodes[0], UI->NumCodes));
523
524 outs() << "\n";
525 outs().flush();
526 }
527
528 /// Prints out the given RuntimeFunction struct for x64, assuming that Obj is
529 /// pointing to an executable file.
530 static void printRuntimeFunction(const COFFObjectFile *Obj,
531 const RuntimeFunction &RF) {
532 if (!RF.StartAddress)
533 return;
534 outs() << "Function Table:\n"
535 << format(" Start Address: 0x%04x\n",
536 static_cast<uint32_t>(RF.StartAddress))
537 << format(" End Address: 0x%04x\n",
538 static_cast<uint32_t>(RF.EndAddress))
539 << format(" Unwind Info Address: 0x%04x\n",
540 static_cast<uint32_t>(RF.UnwindInfoOffset));
541 uintptr_t addr;
542 if (Obj->getRvaPtr(RF.UnwindInfoOffset, addr))
543 return;
544 printWin64EHUnwindInfo(reinterpret_cast<const Win64EH::UnwindInfo *>(addr));
545 }
546
547 /// Prints out the given RuntimeFunction struct for x64, assuming that Obj is
548 /// pointing to an object file. Unlike executable, fields in RuntimeFunction
549 /// struct are filled with zeros, but instead there are relocations pointing to
550 /// them so that the linker will fill targets' RVAs to the fields at link
551 /// time. This function interprets the relocations to find the data to be used
552 /// in the resulting executable.
553 static void printRuntimeFunctionRels(const COFFObjectFile *Obj,
554 const RuntimeFunction &RF,
555 uint64_t SectionOffset,
556 const std::vector<RelocationRef> &Rels) {
557 outs() << "Function Table:\n";
558 outs() << " Start Address: ";
559 printCOFFSymbolAddress(outs(), Rels,
560 SectionOffset +
561 /*offsetof(RuntimeFunction, StartAddress)*/ 0,
562 RF.StartAddress);
563 outs() << "\n";
564
565 outs() << " End Address: ";
566 printCOFFSymbolAddress(outs(), Rels,
567 SectionOffset +
568 /*offsetof(RuntimeFunction, EndAddress)*/ 4,
569 RF.EndAddress);
570 outs() << "\n";
571
572 outs() << " Unwind Info Address: ";
573 printCOFFSymbolAddress(outs(), Rels,
574 SectionOffset +
575 /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
576 RF.UnwindInfoOffset);
577 outs() << "\n";
578
579 ArrayRef<uint8_t> XContents;
580 uint64_t UnwindInfoOffset = 0;
581 if (Error E = getSectionContents(
582 Obj, Rels,
583 SectionOffset +
584 /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
585 XContents, UnwindInfoOffset))
586 reportError(std::move(E), Obj->getFileName());
587 if (XContents.empty())
588 return;
589
590 UnwindInfoOffset += RF.UnwindInfoOffset;
591 if (UnwindInfoOffset > XContents.size())
592 return;
593
594 auto *UI = reinterpret_cast<const Win64EH::UnwindInfo *>(XContents.data() +
595 UnwindInfoOffset);
596 printWin64EHUnwindInfo(UI);
597 }
598
599 void printCOFFUnwindInfo(const COFFObjectFile *Obj) {
600 if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_AMD64) {
601 WithColor::error(errs(), "llvm-objdump")
602 << "unsupported image machine type "
603 "(currently only AMD64 is supported).\n";
604 return;
605 }
606
607 std::vector<RelocationRef> Rels;
608 const RuntimeFunction *RFStart;
609 int NumRFs;
610 if (!getPDataSection(Obj, Rels, RFStart, NumRFs))
611 return;
612 ArrayRef<RuntimeFunction> RFs(RFStart, NumRFs);
613
614 bool IsExecutable = Rels.empty();
615 if (IsExecutable) {
616 for (const RuntimeFunction &RF : RFs)
617 printRuntimeFunction(Obj, RF);
618 return;
619 }
620
621 for (const RuntimeFunction &RF : RFs) {
622 uint64_t SectionOffset =
623 std::distance(RFs.begin(), &RF) * sizeof(RuntimeFunction);
624 printRuntimeFunctionRels(Obj, RF, SectionOffset, Rels);
625 }
626 }
627
628 void printCOFFFileHeader(const object::ObjectFile *Obj) {
629 const COFFObjectFile *file = dyn_cast<const COFFObjectFile>(Obj);
630 printTLSDirectory(file);
631 printLoadConfiguration(file);
632 printImportTables(file);
633 printExportTable(file);
634 }
635
636 void printCOFFSymbolTable(const object::COFFImportFile *i) {
637 unsigned Index = 0;
638 bool IsCode = i->getCOFFImportHeader()->getType() == COFF::IMPORT_CODE;
639
640 for (const object::BasicSymbolRef &Sym : i->symbols()) {
641 std::string Name;
642 raw_string_ostream NS(Name);
643
644 cantFail(Sym.printName(NS));
645 NS.flush();
646
647 outs() << "[" << format("%2d", Index) << "]"
648 << "(sec " << format("%2d", 0) << ")"
649 << "(fl 0x00)" // Flag bits, which COFF doesn't have.
650 << "(ty " << format("%3x", (IsCode && Index) ? 32 : 0) << ")"
651 << "(scl " << format("%3x", 0) << ") "
652 << "(nx " << 0 << ") "
653 << "0x" << format("%08x", 0) << " " << Name << '\n';
654
655 ++Index;
656 }
657 }
658
659 void printCOFFSymbolTable(const COFFObjectFile *coff) {
660 for (unsigned SI = 0, SE = coff->getNumberOfSymbols(); SI != SE; ++SI) {
661 Expected<COFFSymbolRef> Symbol = coff->getSymbol(SI);
662 if (!Symbol)
663 reportError(Symbol.takeError(), coff->getFileName());
664
665 StringRef Name;
666 if (std::error_code EC = coff->getSymbolName(*Symbol, Name))
667 reportError(errorCodeToError(EC), coff->getFileName());
668
669 outs() << "[" << format("%2d", SI) << "]"
670 << "(sec " << format("%2d", int(Symbol->getSectionNumber())) << ")"
671 << "(fl 0x00)" // Flag bits, which COFF doesn't have.
672 << "(ty " << format("%3x", unsigned(Symbol->getType())) << ")"
673 << "(scl " << format("%3x", unsigned(Symbol->getStorageClass()))
674 << ") "
675 << "(nx " << unsigned(Symbol->getNumberOfAuxSymbols()) << ") "
676 << "0x" << format("%08x", unsigned(Symbol->getValue())) << " "
677 << Name;
678 if (Demangle && Name.startswith("?")) {
679 char *DemangledSymbol = nullptr;
680 size_t Size = 0;
681 int Status = -1;
682 DemangledSymbol =
683 microsoftDemangle(Name.data(), DemangledSymbol, &Size, &Status);
684
685 if (Status == 0 && DemangledSymbol) {
686 outs() << " (" << StringRef(DemangledSymbol) << ")";
687 std::free(DemangledSymbol);
688 } else {
689 outs() << " (invalid mangled name)";
690 }
691 }
692 outs() << "\n";
693
694 for (unsigned AI = 0, AE = Symbol->getNumberOfAuxSymbols(); AI < AE; ++AI, ++SI) {
695 if (Symbol->isSectionDefinition()) {
696 const coff_aux_section_definition *asd;
697 if (std::error_code EC =
698 coff->getAuxSymbol<coff_aux_section_definition>(SI + 1, asd))
699 reportError(errorCodeToError(EC), coff->getFileName());
700
701 int32_t AuxNumber = asd->getNumber(Symbol->isBigObj());
702
703 outs() << "AUX "
704 << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x "
705 , unsigned(asd->Length)
706 , unsigned(asd->NumberOfRelocations)
707 , unsigned(asd->NumberOfLinenumbers)
708 , unsigned(asd->CheckSum))
709 << format("assoc %d comdat %d\n"
710 , unsigned(AuxNumber)
711 , unsigned(asd->Selection));
712 } else if (Symbol->isFileRecord()) {
713 const char *FileName;
714 if (std::error_code EC = coff->getAuxSymbol<char>(SI + 1, FileName))
715 reportError(errorCodeToError(EC), coff->getFileName());
716
717 StringRef Name(FileName, Symbol->getNumberOfAuxSymbols() *
718 coff->getSymbolTableEntrySize());
719 outs() << "AUX " << Name.rtrim(StringRef("\0", 1)) << '\n';
720
721 SI = SI + Symbol->getNumberOfAuxSymbols();
722 break;
723 } else if (Symbol->isWeakExternal()) {
724 const coff_aux_weak_external *awe;
725 if (std::error_code EC =
726 coff->getAuxSymbol<coff_aux_weak_external>(SI + 1, awe))
727 reportError(errorCodeToError(EC), coff->getFileName());
728
729 outs() << "AUX " << format("indx %d srch %d\n",
730 static_cast<uint32_t>(awe->TagIndex),
731 static_cast<uint32_t>(awe->Characteristics));
732 } else {
733 outs() << "AUX Unknown\n";
734 }
735 }
736 }
737 }
738 } // namespace llvm
The low level virtual machine