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[X86] Various type corrections to the code that creates LOCK_OR32mi8/OR32mi8Locked...
[llvm-core.git] / tools / llvm-objdump / COFFDump.cpp
bloba81068c2ca45f6cf8590b59afc6d1bffd0e8b93c
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 if (std::error_code EC = Obj->getSectionContents(Section, Contents))
202 return errorCodeToError(EC);
203 return Error::success();
204 }
205
206 // Given a vector of relocations for a section and an offset into this section
207 // the function returns the name of the symbol used for the relocation at the
208 // offset.
209 static Error resolveSymbolName(const std::vector<RelocationRef> &Rels,
210 uint64_t Offset, StringRef &Name) {
211 SymbolRef Sym;
212 if (Error EC = resolveSymbol(Rels, Offset, Sym))
213 return EC;
214 Expected<StringRef> NameOrErr = Sym.getName();
215 if (!NameOrErr)
216 return NameOrErr.takeError();
217 Name = *NameOrErr;
218 return Error::success();
219 }
220
221 static void printCOFFSymbolAddress(raw_ostream &Out,
222 const std::vector<RelocationRef> &Rels,
223 uint64_t Offset, uint32_t Disp) {
224 StringRef Sym;
225 if (!resolveSymbolName(Rels, Offset, Sym)) {
226 Out << Sym;
227 if (Disp > 0)
228 Out << format(" + 0x%04x", Disp);
229 } else {
230 Out << format("0x%04x", Disp);
231 }
232 }
233
234 static void
235 printSEHTable(const COFFObjectFile *Obj, uint32_t TableVA, int Count) {
236 if (Count == 0)
237 return;
238
239 const pe32_header *PE32Header;
240 error(Obj->getPE32Header(PE32Header));
241 uint32_t ImageBase = PE32Header->ImageBase;
242 uintptr_t IntPtr = 0;
243 error(Obj->getVaPtr(TableVA, IntPtr));
244 const support::ulittle32_t *P = (const support::ulittle32_t *)IntPtr;
245 outs() << "SEH Table:";
246 for (int I = 0; I < Count; ++I)
247 outs() << format(" 0x%x", P[I] + ImageBase);
248 outs() << "\n\n";
249 }
250
251 template <typename T>
252 static void printTLSDirectoryT(const coff_tls_directory<T> *TLSDir) {
253 size_t FormatWidth = sizeof(T) * 2;
254 outs() << "TLS directory:"
255 << "\n StartAddressOfRawData: "
256 << format_hex(TLSDir->StartAddressOfRawData, FormatWidth)
257 << "\n EndAddressOfRawData: "
258 << format_hex(TLSDir->EndAddressOfRawData, FormatWidth)
259 << "\n AddressOfIndex: "
260 << format_hex(TLSDir->AddressOfIndex, FormatWidth)
261 << "\n AddressOfCallBacks: "
262 << format_hex(TLSDir->AddressOfCallBacks, FormatWidth)
263 << "\n SizeOfZeroFill: "
264 << TLSDir->SizeOfZeroFill
265 << "\n Characteristics: "
266 << TLSDir->Characteristics
267 << "\n Alignment: "
268 << TLSDir->getAlignment()
269 << "\n\n";
270 }
271
272 static void printTLSDirectory(const COFFObjectFile *Obj) {
273 const pe32_header *PE32Header;
274 error(Obj->getPE32Header(PE32Header));
275
276 const pe32plus_header *PE32PlusHeader;
277 error(Obj->getPE32PlusHeader(PE32PlusHeader));
278
279 // Skip if it's not executable.
280 if (!PE32Header && !PE32PlusHeader)
281 return;
282
283 const data_directory *DataDir;
284 error(Obj->getDataDirectory(COFF::TLS_TABLE, DataDir));
285 uintptr_t IntPtr = 0;
286 if (DataDir->RelativeVirtualAddress == 0)
287 return;
288 error(Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr));
289
290 if (PE32Header) {
291 auto *TLSDir = reinterpret_cast<const coff_tls_directory32 *>(IntPtr);
292 printTLSDirectoryT(TLSDir);
293 } else {
294 auto *TLSDir = reinterpret_cast<const coff_tls_directory64 *>(IntPtr);
295 printTLSDirectoryT(TLSDir);
296 }
297
298 outs() << "\n";
299 }
300
301 static void printLoadConfiguration(const COFFObjectFile *Obj) {
302 // Skip if it's not executable.
303 const pe32_header *PE32Header;
304 error(Obj->getPE32Header(PE32Header));
305 if (!PE32Header)
306 return;
307
308 // Currently only x86 is supported
309 if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_I386)
310 return;
311
312 const data_directory *DataDir;
313 error(Obj->getDataDirectory(COFF::LOAD_CONFIG_TABLE, DataDir));
314 uintptr_t IntPtr = 0;
315 if (DataDir->RelativeVirtualAddress == 0)
316 return;
317 error(Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr));
318
319 auto *LoadConf = reinterpret_cast<const coff_load_configuration32 *>(IntPtr);
320 outs() << "Load configuration:"
321 << "\n Timestamp: " << LoadConf->TimeDateStamp
322 << "\n Major Version: " << LoadConf->MajorVersion
323 << "\n Minor Version: " << LoadConf->MinorVersion
324 << "\n GlobalFlags Clear: " << LoadConf->GlobalFlagsClear
325 << "\n GlobalFlags Set: " << LoadConf->GlobalFlagsSet
326 << "\n Critical Section Default Timeout: " << LoadConf->CriticalSectionDefaultTimeout
327 << "\n Decommit Free Block Threshold: " << LoadConf->DeCommitFreeBlockThreshold
328 << "\n Decommit Total Free Threshold: " << LoadConf->DeCommitTotalFreeThreshold
329 << "\n Lock Prefix Table: " << LoadConf->LockPrefixTable
330 << "\n Maximum Allocation Size: " << LoadConf->MaximumAllocationSize
331 << "\n Virtual Memory Threshold: " << LoadConf->VirtualMemoryThreshold
332 << "\n Process Affinity Mask: " << LoadConf->ProcessAffinityMask
333 << "\n Process Heap Flags: " << LoadConf->ProcessHeapFlags
334 << "\n CSD Version: " << LoadConf->CSDVersion
335 << "\n Security Cookie: " << LoadConf->SecurityCookie
336 << "\n SEH Table: " << LoadConf->SEHandlerTable
337 << "\n SEH Count: " << LoadConf->SEHandlerCount
338 << "\n\n";
339 printSEHTable(Obj, LoadConf->SEHandlerTable, LoadConf->SEHandlerCount);
340 outs() << "\n";
341 }
342
343 // Prints import tables. The import table is a table containing the list of
344 // DLL name and symbol names which will be linked by the loader.
345 static void printImportTables(const COFFObjectFile *Obj) {
346 import_directory_iterator I = Obj->import_directory_begin();
347 import_directory_iterator E = Obj->import_directory_end();
348 if (I == E)
349 return;
350 outs() << "The Import Tables:\n";
351 for (const ImportDirectoryEntryRef &DirRef : Obj->import_directories()) {
352 const coff_import_directory_table_entry *Dir;
353 StringRef Name;
354 if (DirRef.getImportTableEntry(Dir)) return;
355 if (DirRef.getName(Name)) return;
356
357 outs() << format(" lookup %08x time %08x fwd %08x name %08x addr %08x\n\n",
358 static_cast<uint32_t>(Dir->ImportLookupTableRVA),
359 static_cast<uint32_t>(Dir->TimeDateStamp),
360 static_cast<uint32_t>(Dir->ForwarderChain),
361 static_cast<uint32_t>(Dir->NameRVA),
362 static_cast<uint32_t>(Dir->ImportAddressTableRVA));
363 outs() << " DLL Name: " << Name << "\n";
364 outs() << " Hint/Ord Name\n";
365 for (const ImportedSymbolRef &Entry : DirRef.imported_symbols()) {
366 bool IsOrdinal;
367 if (Entry.isOrdinal(IsOrdinal))
368 return;
369 if (IsOrdinal) {
370 uint16_t Ordinal;
371 if (Entry.getOrdinal(Ordinal))
372 return;
373 outs() << format(" % 6d\n", Ordinal);
374 continue;
375 }
376 uint32_t HintNameRVA;
377 if (Entry.getHintNameRVA(HintNameRVA))
378 return;
379 uint16_t Hint;
380 StringRef Name;
381 if (Obj->getHintName(HintNameRVA, Hint, Name))
382 return;
383 outs() << format(" % 6d ", Hint) << Name << "\n";
384 }
385 outs() << "\n";
386 }
387 }
388
389 // Prints export tables. The export table is a table containing the list of
390 // exported symbol from the DLL.
391 static void printExportTable(const COFFObjectFile *Obj) {
392 outs() << "Export Table:\n";
393 export_directory_iterator I = Obj->export_directory_begin();
394 export_directory_iterator E = Obj->export_directory_end();
395 if (I == E)
396 return;
397 StringRef DllName;
398 uint32_t OrdinalBase;
399 if (I->getDllName(DllName))
400 return;
401 if (I->getOrdinalBase(OrdinalBase))
402 return;
403 outs() << " DLL name: " << DllName << "\n";
404 outs() << " Ordinal base: " << OrdinalBase << "\n";
405 outs() << " Ordinal RVA Name\n";
406 for (; I != E; I = ++I) {
407 uint32_t Ordinal;
408 if (I->getOrdinal(Ordinal))
409 return;
410 uint32_t RVA;
411 if (I->getExportRVA(RVA))
412 return;
413 bool IsForwarder;
414 if (I->isForwarder(IsForwarder))
415 return;
416
417 if (IsForwarder) {
418 // Export table entries can be used to re-export symbols that
419 // this COFF file is imported from some DLLs. This is rare.
420 // In most cases IsForwarder is false.
421 outs() << format(" % 4d ", Ordinal);
422 } else {
423 outs() << format(" % 4d %# 8x", Ordinal, RVA);
424 }
425
426 StringRef Name;
427 if (I->getSymbolName(Name))
428 continue;
429 if (!Name.empty())
430 outs() << " " << Name;
431 if (IsForwarder) {
432 StringRef S;
433 if (I->getForwardTo(S))
434 return;
435 outs() << " (forwarded to " << S << ")";
436 }
437 outs() << "\n";
438 }
439 }
440
441 // Given the COFF object file, this function returns the relocations for .pdata
442 // and the pointer to "runtime function" structs.
443 static bool getPDataSection(const COFFObjectFile *Obj,
444 std::vector<RelocationRef> &Rels,
445 const RuntimeFunction *&RFStart, int &NumRFs) {
446 for (const SectionRef &Section : Obj->sections()) {
447 StringRef Name;
448 error(Section.getName(Name));
449 if (Name != ".pdata")
450 continue;
451
452 const coff_section *Pdata = Obj->getCOFFSection(Section);
453 for (const RelocationRef &Reloc : Section.relocations())
454 Rels.push_back(Reloc);
455
456 // Sort relocations by address.
457 llvm::sort(Rels, isRelocAddressLess);
458
459 ArrayRef<uint8_t> Contents;
460 error(Obj->getSectionContents(Pdata, Contents));
461 if (Contents.empty())
462 continue;
463
464 RFStart = reinterpret_cast<const RuntimeFunction *>(Contents.data());
465 NumRFs = Contents.size() / sizeof(RuntimeFunction);
466 return true;
467 }
468 return false;
469 }
470
471 Error getCOFFRelocationValueString(const COFFObjectFile *Obj,
472 const RelocationRef &Rel,
473 SmallVectorImpl<char> &Result) {
474 symbol_iterator SymI = Rel.getSymbol();
475 Expected<StringRef> SymNameOrErr = SymI->getName();
476 if (!SymNameOrErr)
477 return SymNameOrErr.takeError();
478 StringRef SymName = *SymNameOrErr;
479 Result.append(SymName.begin(), SymName.end());
480 return Error::success();
481 }
482
483 static void printWin64EHUnwindInfo(const Win64EH::UnwindInfo *UI) {
484 // The casts to int are required in order to output the value as number.
485 // Without the casts the value would be interpreted as char data (which
486 // results in garbage output).
487 outs() << " Version: " << static_cast<int>(UI->getVersion()) << "\n";
488 outs() << " Flags: " << static_cast<int>(UI->getFlags());
489 if (UI->getFlags()) {
490 if (UI->getFlags() & UNW_ExceptionHandler)
491 outs() << " UNW_ExceptionHandler";
492 if (UI->getFlags() & UNW_TerminateHandler)
493 outs() << " UNW_TerminateHandler";
494 if (UI->getFlags() & UNW_ChainInfo)
495 outs() << " UNW_ChainInfo";
496 }
497 outs() << "\n";
498 outs() << " Size of prolog: " << static_cast<int>(UI->PrologSize) << "\n";
499 outs() << " Number of Codes: " << static_cast<int>(UI->NumCodes) << "\n";
500 // Maybe this should move to output of UOP_SetFPReg?
501 if (UI->getFrameRegister()) {
502 outs() << " Frame register: "
503 << getUnwindRegisterName(UI->getFrameRegister()) << "\n";
504 outs() << " Frame offset: " << 16 * UI->getFrameOffset() << "\n";
505 } else {
506 outs() << " No frame pointer used\n";
507 }
508 if (UI->getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) {
509 // FIXME: Output exception handler data
510 } else if (UI->getFlags() & UNW_ChainInfo) {
511 // FIXME: Output chained unwind info
512 }
513
514 if (UI->NumCodes)
515 outs() << " Unwind Codes:\n";
516
517 printAllUnwindCodes(makeArrayRef(&UI->UnwindCodes[0], UI->NumCodes));
518
519 outs() << "\n";
520 outs().flush();
521 }
522
523 /// Prints out the given RuntimeFunction struct for x64, assuming that Obj is
524 /// pointing to an executable file.
525 static void printRuntimeFunction(const COFFObjectFile *Obj,
526 const RuntimeFunction &RF) {
527 if (!RF.StartAddress)
528 return;
529 outs() << "Function Table:\n"
530 << format(" Start Address: 0x%04x\n",
531 static_cast<uint32_t>(RF.StartAddress))
532 << format(" End Address: 0x%04x\n",
533 static_cast<uint32_t>(RF.EndAddress))
534 << format(" Unwind Info Address: 0x%04x\n",
535 static_cast<uint32_t>(RF.UnwindInfoOffset));
536 uintptr_t addr;
537 if (Obj->getRvaPtr(RF.UnwindInfoOffset, addr))
538 return;
539 printWin64EHUnwindInfo(reinterpret_cast<const Win64EH::UnwindInfo *>(addr));
540 }
541
542 /// Prints out the given RuntimeFunction struct for x64, assuming that Obj is
543 /// pointing to an object file. Unlike executable, fields in RuntimeFunction
544 /// struct are filled with zeros, but instead there are relocations pointing to
545 /// them so that the linker will fill targets' RVAs to the fields at link
546 /// time. This function interprets the relocations to find the data to be used
547 /// in the resulting executable.
548 static void printRuntimeFunctionRels(const COFFObjectFile *Obj,
549 const RuntimeFunction &RF,
550 uint64_t SectionOffset,
551 const std::vector<RelocationRef> &Rels) {
552 outs() << "Function Table:\n";
553 outs() << " Start Address: ";
554 printCOFFSymbolAddress(outs(), Rels,
555 SectionOffset +
556 /*offsetof(RuntimeFunction, StartAddress)*/ 0,
557 RF.StartAddress);
558 outs() << "\n";
559
560 outs() << " End Address: ";
561 printCOFFSymbolAddress(outs(), Rels,
562 SectionOffset +
563 /*offsetof(RuntimeFunction, EndAddress)*/ 4,
564 RF.EndAddress);
565 outs() << "\n";
566
567 outs() << " Unwind Info Address: ";
568 printCOFFSymbolAddress(outs(), Rels,
569 SectionOffset +
570 /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
571 RF.UnwindInfoOffset);
572 outs() << "\n";
573
574 ArrayRef<uint8_t> XContents;
575 uint64_t UnwindInfoOffset = 0;
576 error(getSectionContents(
577 Obj, Rels, SectionOffset +
578 /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
579 XContents, UnwindInfoOffset));
580 if (XContents.empty())
581 return;
582
583 UnwindInfoOffset += RF.UnwindInfoOffset;
584 if (UnwindInfoOffset > XContents.size())
585 return;
586
587 auto *UI = reinterpret_cast<const Win64EH::UnwindInfo *>(XContents.data() +
588 UnwindInfoOffset);
589 printWin64EHUnwindInfo(UI);
590 }
591
592 void printCOFFUnwindInfo(const COFFObjectFile *Obj) {
593 if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_AMD64) {
594 WithColor::error(errs(), "llvm-objdump")
595 << "unsupported image machine type "
596 "(currently only AMD64 is supported).\n";
597 return;
598 }
599
600 std::vector<RelocationRef> Rels;
601 const RuntimeFunction *RFStart;
602 int NumRFs;
603 if (!getPDataSection(Obj, Rels, RFStart, NumRFs))
604 return;
605 ArrayRef<RuntimeFunction> RFs(RFStart, NumRFs);
606
607 bool IsExecutable = Rels.empty();
608 if (IsExecutable) {
609 for (const RuntimeFunction &RF : RFs)
610 printRuntimeFunction(Obj, RF);
611 return;
612 }
613
614 for (const RuntimeFunction &RF : RFs) {
615 uint64_t SectionOffset =
616 std::distance(RFs.begin(), &RF) * sizeof(RuntimeFunction);
617 printRuntimeFunctionRels(Obj, RF, SectionOffset, Rels);
618 }
619 }
620
621 void printCOFFFileHeader(const object::ObjectFile *Obj) {
622 const COFFObjectFile *file = dyn_cast<const COFFObjectFile>(Obj);
623 printTLSDirectory(file);
624 printLoadConfiguration(file);
625 printImportTables(file);
626 printExportTable(file);
627 }
628
629 void printCOFFSymbolTable(const object::COFFImportFile *i) {
630 unsigned Index = 0;
631 bool IsCode = i->getCOFFImportHeader()->getType() == COFF::IMPORT_CODE;
632
633 for (const object::BasicSymbolRef &Sym : i->symbols()) {
634 std::string Name;
635 raw_string_ostream NS(Name);
636
637 cantFail(Sym.printName(NS));
638 NS.flush();
639
640 outs() << "[" << format("%2d", Index) << "]"
641 << "(sec " << format("%2d", 0) << ")"
642 << "(fl 0x00)" // Flag bits, which COFF doesn't have.
643 << "(ty " << format("%3x", (IsCode && Index) ? 32 : 0) << ")"
644 << "(scl " << format("%3x", 0) << ") "
645 << "(nx " << 0 << ") "
646 << "0x" << format("%08x", 0) << " " << Name << '\n';
647
648 ++Index;
649 }
650 }
651
652 void printCOFFSymbolTable(const COFFObjectFile *coff) {
653 for (unsigned SI = 0, SE = coff->getNumberOfSymbols(); SI != SE; ++SI) {
654 Expected<COFFSymbolRef> Symbol = coff->getSymbol(SI);
655 StringRef Name;
656 error(Symbol.takeError());
657 error(coff->getSymbolName(*Symbol, Name));
658
659 outs() << "[" << format("%2d", SI) << "]"
660 << "(sec " << format("%2d", int(Symbol->getSectionNumber())) << ")"
661 << "(fl 0x00)" // Flag bits, which COFF doesn't have.
662 << "(ty " << format("%3x", unsigned(Symbol->getType())) << ")"
663 << "(scl " << format("%3x", unsigned(Symbol->getStorageClass()))
664 << ") "
665 << "(nx " << unsigned(Symbol->getNumberOfAuxSymbols()) << ") "
666 << "0x" << format("%08x", unsigned(Symbol->getValue())) << " "
667 << Name;
668 if (Demangle && Name.startswith("?")) {
669 char *DemangledSymbol = nullptr;
670 size_t Size = 0;
671 int Status = -1;
672 DemangledSymbol =
673 microsoftDemangle(Name.data(), DemangledSymbol, &Size, &Status);
674
675 if (Status == 0 && DemangledSymbol) {
676 outs() << " (" << StringRef(DemangledSymbol) << ")";
677 std::free(DemangledSymbol);
678 } else {
679 outs() << " (invalid mangled name)";
680 }
681 }
682 outs() << "\n";
683
684 for (unsigned AI = 0, AE = Symbol->getNumberOfAuxSymbols(); AI < AE; ++AI, ++SI) {
685 if (Symbol->isSectionDefinition()) {
686 const coff_aux_section_definition *asd;
687 error(coff->getAuxSymbol<coff_aux_section_definition>(SI + 1, asd));
688
689 int32_t AuxNumber = asd->getNumber(Symbol->isBigObj());
690
691 outs() << "AUX "
692 << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x "
693 , unsigned(asd->Length)
694 , unsigned(asd->NumberOfRelocations)
695 , unsigned(asd->NumberOfLinenumbers)
696 , unsigned(asd->CheckSum))
697 << format("assoc %d comdat %d\n"
698 , unsigned(AuxNumber)
699 , unsigned(asd->Selection));
700 } else if (Symbol->isFileRecord()) {
701 const char *FileName;
702 error(coff->getAuxSymbol<char>(SI + 1, FileName));
703
704 StringRef Name(FileName, Symbol->getNumberOfAuxSymbols() *
705 coff->getSymbolTableEntrySize());
706 outs() << "AUX " << Name.rtrim(StringRef("\0", 1)) << '\n';
707
708 SI = SI + Symbol->getNumberOfAuxSymbols();
709 break;
710 } else if (Symbol->isWeakExternal()) {
711 const coff_aux_weak_external *awe;
712 error(coff->getAuxSymbol<coff_aux_weak_external>(SI + 1, awe));
713
714 outs() << "AUX " << format("indx %d srch %d\n",
715 static_cast<uint32_t>(awe->TagIndex),
716 static_cast<uint32_t>(awe->Characteristics));
717 } else {
718 outs() << "AUX Unknown\n";
719 }
720 }
721 }
722 }
723 } // namespace llvm
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