xref: /freebsd/contrib/llvm-project/llvm/tools/llvm-readobj/XCOFFDumper.cpp (revision 0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583) 
1 //===-- XCOFFDumper.cpp - XCOFF dumping utility -----------------*- 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 // This file implements an XCOFF specific dumper for llvm-readobj.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "ObjDumper.h"
14 #include "llvm-readobj.h"
15 #include "llvm/Demangle/Demangle.h"
16 #include "llvm/Object/XCOFFObjectFile.h"
17 #include "llvm/Support/FormattedStream.h"
18 #include "llvm/Support/ScopedPrinter.h"
19 
20 #include <ctime>
21 
22 using namespace llvm;
23 using namespace object;
24 
25 namespace {
26 
27 class XCOFFDumper : public ObjDumper {
28 
29 public:
XCOFFDumper(const XCOFFObjectFile & Obj,ScopedPrinter & Writer)30   XCOFFDumper(const XCOFFObjectFile &Obj, ScopedPrinter &Writer)
31       : ObjDumper(Writer, Obj.getFileName()), Obj(Obj) {}
32 
33   void printFileHeaders() override;
34   void printAuxiliaryHeader() override;
35   void printSectionHeaders() override;
36   void printRelocations() override;
37   void printSymbols(bool ExtraSymInfo) override;
38   void printDynamicSymbols() override;
39   void printUnwindInfo() override;
40   void printStackMap() const override;
41   void printNeededLibraries() override;
42   void printStringTable() override;
43   void printExceptionSection() override;
44   void printLoaderSection(bool PrintHeader, bool PrintSymbols,
45                           bool PrintRelocations) override;
46 
getScopedPrinter() const47   ScopedPrinter &getScopedPrinter() const { return W; }
48 
49 private:
50   template <typename T> void printSectionHeaders(ArrayRef<T> Sections);
51   template <typename T> void printGenericSectionHeader(T &Sec) const;
52   template <typename T> void printOverflowSectionHeader(T &Sec) const;
53   template <typename T>
54   void printExceptionSectionEntry(const T &ExceptionSectEnt) const;
55   template <typename T> void printExceptionSectionEntries() const;
56   template <typename T> const T *getAuxEntPtr(uintptr_t AuxAddress);
57   void printFileAuxEnt(const XCOFFFileAuxEnt *AuxEntPtr);
58   void printCsectAuxEnt(XCOFFCsectAuxRef AuxEntRef);
59   void printSectAuxEntForStat(const XCOFFSectAuxEntForStat *AuxEntPtr);
60   void printExceptionAuxEnt(const XCOFFExceptionAuxEnt *AuxEntPtr);
61   void printFunctionAuxEnt(const XCOFFFunctionAuxEnt32 *AuxEntPtr);
62   void printFunctionAuxEnt(const XCOFFFunctionAuxEnt64 *AuxEntPtr);
63   void printBlockAuxEnt(const XCOFFBlockAuxEnt32 *AuxEntPtr);
64   void printBlockAuxEnt(const XCOFFBlockAuxEnt64 *AuxEntPtr);
65   template <typename T> void printSectAuxEntForDWARF(const T *AuxEntPtr);
66   void printSymbol(const SymbolRef &);
67   template <typename RelTy> void printRelocation(RelTy Reloc);
68   template <typename Shdr, typename RelTy>
69   void printRelocations(ArrayRef<Shdr> Sections);
70   void printAuxiliaryHeader(const XCOFFAuxiliaryHeader32 *AuxHeader);
71   void printAuxiliaryHeader(const XCOFFAuxiliaryHeader64 *AuxHeader);
72   void printLoaderSectionHeader(uintptr_t LoaderSectAddr);
73   void printLoaderSectionSymbols(uintptr_t LoaderSectAddr);
74   template <typename LoaderSectionSymbolEntry, typename LoaderSectionHeader>
75   void printLoaderSectionSymbolsHelper(uintptr_t LoaderSectAddr);
76   template <typename LoadSectionRelocTy>
77   void printLoaderSectionRelocationEntry(LoadSectionRelocTy *LoaderSecRelEntPtr,
78                                          StringRef SymbolName);
79   void printLoaderSectionRelocationEntries(uintptr_t LoaderSectAddr);
80   template <typename LoaderSectionHeader, typename LoaderSectionSymbolEntry,
81             typename LoaderSectionRelocationEntry>
82   void printLoaderSectionRelocationEntriesHelper(uintptr_t LoaderSectAddr);
83 
84   const XCOFFObjectFile &Obj;
85   const static int32_t FirstSymIdxOfLoaderSec = 3;
86 };
87 } // anonymous namespace
88 
printFileHeaders()89 void XCOFFDumper::printFileHeaders() {
90   DictScope DS(W, "FileHeader");
91   W.printHex("Magic", Obj.getMagic());
92   W.printNumber("NumberOfSections", Obj.getNumberOfSections());
93 
94   // Negative timestamp values are reserved for future use.
95   int32_t TimeStamp = Obj.getTimeStamp();
96   if (TimeStamp > 0) {
97     // This handling of the time stamp assumes that the host system's time_t is
98     // compatible with AIX time_t. If a platform is not compatible, the lit
99     // tests will let us know.
100     time_t TimeDate = TimeStamp;
101 
102     char FormattedTime[80] = {};
103 
104     size_t BytesFormatted =
105       strftime(FormattedTime, sizeof(FormattedTime), "%F %T", gmtime(&TimeDate));
106     if (BytesFormatted)
107       W.printHex("TimeStamp", FormattedTime, TimeStamp);
108     else
109       W.printHex("Timestamp", TimeStamp);
110   } else {
111     W.printHex("TimeStamp", TimeStamp == 0 ? "None" : "Reserved Value",
112                TimeStamp);
113   }
114 
115   // The number of symbol table entries is an unsigned value in 64-bit objects
116   // and a signed value (with negative values being 'reserved') in 32-bit
117   // objects.
118   if (Obj.is64Bit()) {
119     W.printHex("SymbolTableOffset", Obj.getSymbolTableOffset64());
120     W.printNumber("SymbolTableEntries", Obj.getNumberOfSymbolTableEntries64());
121   } else {
122     W.printHex("SymbolTableOffset", Obj.getSymbolTableOffset32());
123     int32_t SymTabEntries = Obj.getRawNumberOfSymbolTableEntries32();
124     if (SymTabEntries >= 0)
125       W.printNumber("SymbolTableEntries", SymTabEntries);
126     else
127       W.printHex("SymbolTableEntries", "Reserved Value", SymTabEntries);
128   }
129 
130   W.printHex("OptionalHeaderSize", Obj.getOptionalHeaderSize());
131   W.printHex("Flags", Obj.getFlags());
132 
133   // TODO FIXME Add support for the auxiliary header (if any) once
134   // XCOFFObjectFile has the necessary support.
135 }
136 
printAuxiliaryHeader()137 void XCOFFDumper::printAuxiliaryHeader() {
138   DictScope DS(W, "AuxiliaryHeader");
139 
140   if (Obj.is64Bit())
141     printAuxiliaryHeader(Obj.auxiliaryHeader64());
142   else
143     printAuxiliaryHeader(Obj.auxiliaryHeader32());
144 }
145 
printSectionHeaders()146 void XCOFFDumper::printSectionHeaders() {
147   if (Obj.is64Bit())
148     printSectionHeaders(Obj.sections64());
149   else
150     printSectionHeaders(Obj.sections32());
151 }
152 
printLoaderSection(bool PrintHeader,bool PrintSymbols,bool PrintRelocations)153 void XCOFFDumper::printLoaderSection(bool PrintHeader, bool PrintSymbols,
154                                      bool PrintRelocations) {
155   DictScope DS(W, "Loader Section");
156   Expected<uintptr_t> LoaderSectionAddrOrError =
157       Obj.getSectionFileOffsetToRawData(XCOFF::STYP_LOADER);
158   if (!LoaderSectionAddrOrError) {
159     reportUniqueWarning(LoaderSectionAddrOrError.takeError());
160     return;
161   }
162   uintptr_t LoaderSectionAddr = LoaderSectionAddrOrError.get();
163 
164   if (LoaderSectionAddr == 0)
165     return;
166 
167   W.indent();
168   if (PrintHeader)
169     printLoaderSectionHeader(LoaderSectionAddr);
170 
171   if (PrintSymbols)
172     printLoaderSectionSymbols(LoaderSectionAddr);
173 
174   if (PrintRelocations)
175     printLoaderSectionRelocationEntries(LoaderSectionAddr);
176 
177   W.unindent();
178 }
179 
printLoaderSectionHeader(uintptr_t LoaderSectionAddr)180 void XCOFFDumper::printLoaderSectionHeader(uintptr_t LoaderSectionAddr) {
181   DictScope DS(W, "Loader Section Header");
182 
183   auto PrintLoadSecHeaderCommon = [&](const auto *LDHeader) {
184     W.printNumber("Version", LDHeader->Version);
185     W.printNumber("NumberOfSymbolEntries", LDHeader->NumberOfSymTabEnt);
186     W.printNumber("NumberOfRelocationEntries", LDHeader->NumberOfRelTabEnt);
187     W.printNumber("LengthOfImportFileIDStringTable",
188                   LDHeader->LengthOfImpidStrTbl);
189     W.printNumber("NumberOfImportFileIDs", LDHeader->NumberOfImpid);
190     W.printHex("OffsetToImportFileIDs", LDHeader->OffsetToImpid);
191     W.printNumber("LengthOfStringTable", LDHeader->LengthOfStrTbl);
192     W.printHex("OffsetToStringTable", LDHeader->OffsetToStrTbl);
193   };
194 
195   if (Obj.is64Bit()) {
196     const LoaderSectionHeader64 *LoaderSec64 =
197         reinterpret_cast<const LoaderSectionHeader64 *>(LoaderSectionAddr);
198     PrintLoadSecHeaderCommon(LoaderSec64);
199     W.printHex("OffsetToSymbolTable", LoaderSec64->OffsetToSymTbl);
200     W.printHex("OffsetToRelocationEntries", LoaderSec64->OffsetToRelEnt);
201   } else {
202     const LoaderSectionHeader32 *LoaderSec32 =
203         reinterpret_cast<const LoaderSectionHeader32 *>(LoaderSectionAddr);
204     PrintLoadSecHeaderCommon(LoaderSec32);
205   }
206 }
207 
208 const EnumEntry<XCOFF::StorageClass> SymStorageClass[] = {
209 #define ECase(X)                                                               \
210   { #X, XCOFF::X }
211     ECase(C_NULL),  ECase(C_AUTO),    ECase(C_EXT),     ECase(C_STAT),
212     ECase(C_REG),   ECase(C_EXTDEF),  ECase(C_LABEL),   ECase(C_ULABEL),
213     ECase(C_MOS),   ECase(C_ARG),     ECase(C_STRTAG),  ECase(C_MOU),
214     ECase(C_UNTAG), ECase(C_TPDEF),   ECase(C_USTATIC), ECase(C_ENTAG),
215     ECase(C_MOE),   ECase(C_REGPARM), ECase(C_FIELD),   ECase(C_BLOCK),
216     ECase(C_FCN),   ECase(C_EOS),     ECase(C_FILE),    ECase(C_LINE),
217     ECase(C_ALIAS), ECase(C_HIDDEN),  ECase(C_HIDEXT),  ECase(C_BINCL),
218     ECase(C_EINCL), ECase(C_INFO),    ECase(C_WEAKEXT), ECase(C_DWARF),
219     ECase(C_GSYM),  ECase(C_LSYM),    ECase(C_PSYM),    ECase(C_RSYM),
220     ECase(C_RPSYM), ECase(C_STSYM),   ECase(C_TCSYM),   ECase(C_BCOMM),
221     ECase(C_ECOML), ECase(C_ECOMM),   ECase(C_DECL),    ECase(C_ENTRY),
222     ECase(C_FUN),   ECase(C_BSTAT),   ECase(C_ESTAT),   ECase(C_GTLS),
223     ECase(C_STTLS), ECase(C_EFCN)
224 #undef ECase
225 };
226 
227 template <typename LoaderSectionSymbolEntry, typename LoaderSectionHeader>
printLoaderSectionSymbolsHelper(uintptr_t LoaderSectionAddr)228 void XCOFFDumper::printLoaderSectionSymbolsHelper(uintptr_t LoaderSectionAddr) {
229   const LoaderSectionHeader *LoadSecHeader =
230       reinterpret_cast<const LoaderSectionHeader *>(LoaderSectionAddr);
231   const LoaderSectionSymbolEntry *LoadSecSymEntPtr =
232       reinterpret_cast<LoaderSectionSymbolEntry *>(
233           LoaderSectionAddr + uintptr_t(LoadSecHeader->getOffsetToSymTbl()));
234 
235   for (uint32_t i = 0; i < LoadSecHeader->NumberOfSymTabEnt;
236        ++i, ++LoadSecSymEntPtr) {
237     if (Error E = Binary::checkOffset(
238             Obj.getMemoryBufferRef(),
239             LoaderSectionAddr + uintptr_t(LoadSecHeader->getOffsetToSymTbl()) +
240                 (i * sizeof(LoaderSectionSymbolEntry)),
241             sizeof(LoaderSectionSymbolEntry))) {
242       reportUniqueWarning(std::move(E));
243       return;
244     }
245 
246     Expected<StringRef> SymbolNameOrErr =
247         LoadSecSymEntPtr->getSymbolName(LoadSecHeader);
248     if (!SymbolNameOrErr) {
249       reportUniqueWarning(SymbolNameOrErr.takeError());
250       return;
251     }
252 
253     DictScope DS(W, "Symbol");
254     StringRef SymbolName = SymbolNameOrErr.get();
255     W.printString("Name", opts::Demangle ? demangle(SymbolName) : SymbolName);
256     W.printHex("Virtual Address", LoadSecSymEntPtr->Value);
257     W.printNumber("SectionNum", LoadSecSymEntPtr->SectionNumber);
258     W.printHex("SymbolType", LoadSecSymEntPtr->SymbolType);
259     W.printEnum("StorageClass",
260                 static_cast<uint8_t>(LoadSecSymEntPtr->StorageClass),
261                 ArrayRef(SymStorageClass));
262     W.printHex("ImportFileID", LoadSecSymEntPtr->ImportFileID);
263     W.printNumber("ParameterTypeCheck", LoadSecSymEntPtr->ParameterTypeCheck);
264   }
265 }
266 
printLoaderSectionSymbols(uintptr_t LoaderSectionAddr)267 void XCOFFDumper::printLoaderSectionSymbols(uintptr_t LoaderSectionAddr) {
268   DictScope DS(W, "Loader Section Symbols");
269   if (Obj.is64Bit())
270     printLoaderSectionSymbolsHelper<LoaderSectionSymbolEntry64,
271                                     LoaderSectionHeader64>(LoaderSectionAddr);
272   else
273     printLoaderSectionSymbolsHelper<LoaderSectionSymbolEntry32,
274                                     LoaderSectionHeader32>(LoaderSectionAddr);
275 }
276 
277 const EnumEntry<XCOFF::RelocationType> RelocationTypeNameclass[] = {
278 #define ECase(X)                                                               \
279   { #X, XCOFF::X }
280     ECase(R_POS),    ECase(R_RL),     ECase(R_RLA),    ECase(R_NEG),
281     ECase(R_REL),    ECase(R_TOC),    ECase(R_TRL),    ECase(R_TRLA),
282     ECase(R_GL),     ECase(R_TCL),    ECase(R_REF),    ECase(R_BA),
283     ECase(R_BR),     ECase(R_RBA),    ECase(R_RBR),    ECase(R_TLS),
284     ECase(R_TLS_IE), ECase(R_TLS_LD), ECase(R_TLS_LE), ECase(R_TLSM),
285     ECase(R_TLSML),  ECase(R_TOCU),   ECase(R_TOCL)
286 #undef ECase
287 };
288 
289 // From the XCOFF specification: there are five implicit external symbols, one
290 // each for the .text, .data, .bss, .tdata, and .tbss sections. These symbols
291 // are referenced from the relocation table entries using symbol table index
292 // values 0, 1, 2, -1, and -2, respectively.
getImplicitLoaderSectionSymName(int SymIndx)293 static const char *getImplicitLoaderSectionSymName(int SymIndx) {
294   switch (SymIndx) {
295   default:
296     return "Unkown Symbol Name";
297   case -2:
298     return ".tbss";
299   case -1:
300     return ".tdata";
301   case 0:
302     return ".text";
303   case 1:
304     return ".data";
305   case 2:
306     return ".bss";
307   }
308 }
309 
310 template <typename LoadSectionRelocTy>
printLoaderSectionRelocationEntry(LoadSectionRelocTy * LoaderSecRelEntPtr,StringRef SymbolName)311 void XCOFFDumper::printLoaderSectionRelocationEntry(
312     LoadSectionRelocTy *LoaderSecRelEntPtr, StringRef SymbolName) {
313   uint16_t Type = LoaderSecRelEntPtr->Type;
314   if (opts::ExpandRelocs) {
315     DictScope DS(W, "Relocation");
316     auto IsRelocationSigned = [](uint8_t Info) {
317       return Info & XCOFF::XR_SIGN_INDICATOR_MASK;
318     };
319     auto IsFixupIndicated = [](uint8_t Info) {
320       return Info & XCOFF::XR_FIXUP_INDICATOR_MASK;
321     };
322     auto GetRelocatedLength = [](uint8_t Info) {
323       // The relocation encodes the bit length being relocated minus 1. Add
324       // back
325       //   the 1 to get the actual length being relocated.
326       return (Info & XCOFF::XR_BIASED_LENGTH_MASK) + 1;
327     };
328 
329     uint8_t Info = Type >> 8;
330     W.printHex("Virtual Address", LoaderSecRelEntPtr->VirtualAddr);
331     W.printNumber("Symbol", opts::Demangle ? demangle(SymbolName) : SymbolName,
332                   LoaderSecRelEntPtr->SymbolIndex);
333     W.printString("IsSigned", IsRelocationSigned(Info) ? "Yes" : "No");
334     W.printNumber("FixupBitValue", IsFixupIndicated(Info) ? 1 : 0);
335     W.printNumber("Length", GetRelocatedLength(Info));
336     W.printEnum("Type", static_cast<uint8_t>(Type),
337                 ArrayRef(RelocationTypeNameclass));
338     W.printNumber("SectionNumber", LoaderSecRelEntPtr->SectionNum);
339   } else {
340     W.startLine() << format_hex(LoaderSecRelEntPtr->VirtualAddr,
341                                 Obj.is64Bit() ? 18 : 10)
342                   << " " << format_hex(Type, 6) << " ("
343                   << XCOFF::getRelocationTypeString(
344                          static_cast<XCOFF::RelocationType>(Type))
345                   << ")" << format_decimal(LoaderSecRelEntPtr->SectionNum, 8)
346                   << "    "
347                   << (opts::Demangle ? demangle(SymbolName) : SymbolName)
348                   << " (" << LoaderSecRelEntPtr->SymbolIndex << ")\n";
349   }
350 }
351 
352 template <typename LoaderSectionHeader, typename LoaderSectionSymbolEntry,
353           typename LoaderSectionRelocationEntry>
printLoaderSectionRelocationEntriesHelper(uintptr_t LoaderSectionAddr)354 void XCOFFDumper::printLoaderSectionRelocationEntriesHelper(
355     uintptr_t LoaderSectionAddr) {
356   const LoaderSectionHeader *LoaderSec =
357       reinterpret_cast<const LoaderSectionHeader *>(LoaderSectionAddr);
358   const LoaderSectionRelocationEntry *LoaderSecRelEntPtr =
359       reinterpret_cast<const LoaderSectionRelocationEntry *>(
360           LoaderSectionAddr + uintptr_t(LoaderSec->getOffsetToRelEnt()));
361 
362   if (!opts::ExpandRelocs)
363     W.startLine() << center_justify("Vaddr", Obj.is64Bit() ? 18 : 10)
364                   << center_justify("Type", 15) << right_justify("SecNum", 8)
365                   << center_justify("SymbolName (Index) ", 24) << "\n";
366 
367   for (uint32_t i = 0; i < LoaderSec->NumberOfRelTabEnt;
368        ++i, ++LoaderSecRelEntPtr) {
369     StringRef SymbolName;
370     if (LoaderSecRelEntPtr->SymbolIndex >= FirstSymIdxOfLoaderSec) {
371       // Because there are implicit symbol index values (-2, -1, 0, 1, 2),
372       // LoaderSecRelEnt.SymbolIndex - FirstSymIdxOfLoaderSec will get the
373       // real symbol from the symbol table.
374       const uint64_t SymOffset =
375           (LoaderSecRelEntPtr->SymbolIndex - FirstSymIdxOfLoaderSec) *
376           sizeof(LoaderSectionSymbolEntry);
377       const LoaderSectionSymbolEntry *LoaderSecRelSymEntPtr =
378           reinterpret_cast<LoaderSectionSymbolEntry *>(
379               LoaderSectionAddr + uintptr_t(LoaderSec->getOffsetToSymTbl()) +
380               SymOffset);
381 
382       Expected<StringRef> SymbolNameOrErr =
383           LoaderSecRelSymEntPtr->getSymbolName(LoaderSec);
384       if (!SymbolNameOrErr) {
385         reportUniqueWarning(SymbolNameOrErr.takeError());
386         return;
387       }
388       SymbolName = SymbolNameOrErr.get();
389     } else
390       SymbolName =
391           getImplicitLoaderSectionSymName(LoaderSecRelEntPtr->SymbolIndex);
392 
393     printLoaderSectionRelocationEntry(LoaderSecRelEntPtr, SymbolName);
394   }
395 }
396 
printLoaderSectionRelocationEntries(uintptr_t LoaderSectionAddr)397 void XCOFFDumper::printLoaderSectionRelocationEntries(
398     uintptr_t LoaderSectionAddr) {
399   DictScope DS(W, "Loader Section Relocations");
400 
401   if (Obj.is64Bit())
402     printLoaderSectionRelocationEntriesHelper<LoaderSectionHeader64,
403                                               LoaderSectionSymbolEntry64,
404                                               LoaderSectionRelocationEntry64>(
405         LoaderSectionAddr);
406   else
407     printLoaderSectionRelocationEntriesHelper<LoaderSectionHeader32,
408                                               LoaderSectionSymbolEntry32,
409                                               LoaderSectionRelocationEntry32>(
410         LoaderSectionAddr);
411 }
412 
413 template <typename T>
printExceptionSectionEntry(const T & ExceptionSectEnt) const414 void XCOFFDumper::printExceptionSectionEntry(const T &ExceptionSectEnt) const {
415   if (ExceptionSectEnt.getReason())
416     W.printHex("Trap Instr Addr", ExceptionSectEnt.getTrapInstAddr());
417   else {
418     uint32_t SymIdx = ExceptionSectEnt.getSymbolIndex();
419     Expected<StringRef> ErrOrSymbolName = Obj.getSymbolNameByIndex(SymIdx);
420     if (Error E = ErrOrSymbolName.takeError()) {
421       reportUniqueWarning(std::move(E));
422       return;
423     }
424     StringRef SymName = *ErrOrSymbolName;
425 
426     W.printNumber("Symbol", SymName, SymIdx);
427   }
428   W.printNumber("LangID", ExceptionSectEnt.getLangID());
429   W.printNumber("Reason", ExceptionSectEnt.getReason());
430 }
431 
printExceptionSectionEntries() const432 template <typename T> void XCOFFDumper::printExceptionSectionEntries() const {
433   Expected<ArrayRef<T>> ExceptSectEntsOrErr = Obj.getExceptionEntries<T>();
434   if (Error E = ExceptSectEntsOrErr.takeError()) {
435     reportUniqueWarning(std::move(E));
436     return;
437   }
438   ArrayRef<T> ExceptSectEnts = *ExceptSectEntsOrErr;
439 
440   DictScope DS(W, "Exception section");
441   if (ExceptSectEnts.empty())
442     return;
443   for (auto &Ent : ExceptSectEnts)
444     printExceptionSectionEntry(Ent);
445 }
446 
printExceptionSection()447 void XCOFFDumper::printExceptionSection() {
448   if (Obj.is64Bit())
449     printExceptionSectionEntries<ExceptionSectionEntry64>();
450   else
451     printExceptionSectionEntries<ExceptionSectionEntry32>();
452 }
453 
printRelocations()454 void XCOFFDumper::printRelocations() {
455   if (Obj.is64Bit())
456     printRelocations<XCOFFSectionHeader64, XCOFFRelocation64>(Obj.sections64());
457   else
458     printRelocations<XCOFFSectionHeader32, XCOFFRelocation32>(Obj.sections32());
459 }
460 
printRelocation(RelTy Reloc)461 template <typename RelTy> void XCOFFDumper::printRelocation(RelTy Reloc) {
462   Expected<StringRef> ErrOrSymbolName =
463       Obj.getSymbolNameByIndex(Reloc.SymbolIndex);
464   if (Error E = ErrOrSymbolName.takeError()) {
465     reportUniqueWarning(std::move(E));
466     return;
467   }
468   StringRef SymbolName = *ErrOrSymbolName;
469   StringRef RelocName = XCOFF::getRelocationTypeString(Reloc.Type);
470   if (opts::ExpandRelocs) {
471     DictScope Group(W, "Relocation");
472     W.printHex("Virtual Address", Reloc.VirtualAddress);
473     W.printNumber("Symbol", opts::Demangle ? demangle(SymbolName) : SymbolName,
474                   Reloc.SymbolIndex);
475     W.printString("IsSigned", Reloc.isRelocationSigned() ? "Yes" : "No");
476     W.printNumber("FixupBitValue", Reloc.isFixupIndicated() ? 1 : 0);
477     W.printNumber("Length", Reloc.getRelocatedLength());
478     W.printEnum("Type", (uint8_t)Reloc.Type, ArrayRef(RelocationTypeNameclass));
479   } else {
480     raw_ostream &OS = W.startLine();
481     OS << W.hex(Reloc.VirtualAddress) << " " << RelocName << " "
482        << (opts::Demangle ? demangle(SymbolName) : SymbolName) << "("
483        << Reloc.SymbolIndex << ") " << W.hex(Reloc.Info) << "\n";
484   }
485 }
486 
487 template <typename Shdr, typename RelTy>
printRelocations(ArrayRef<Shdr> Sections)488 void XCOFFDumper::printRelocations(ArrayRef<Shdr> Sections) {
489   ListScope LS(W, "Relocations");
490   uint16_t Index = 0;
491   for (const Shdr &Sec : Sections) {
492     ++Index;
493     // Only the .text, .data, .tdata, and STYP_DWARF sections have relocation.
494     if (Sec.Flags != XCOFF::STYP_TEXT && Sec.Flags != XCOFF::STYP_DATA &&
495         Sec.Flags != XCOFF::STYP_TDATA && Sec.Flags != XCOFF::STYP_DWARF)
496       continue;
497     Expected<ArrayRef<RelTy>> ErrOrRelocations = Obj.relocations<Shdr, RelTy>(Sec);
498     if (Error E = ErrOrRelocations.takeError()) {
499       reportUniqueWarning(std::move(E));
500       continue;
501     }
502 
503     const ArrayRef<RelTy> Relocations = *ErrOrRelocations;
504     if (Relocations.empty())
505       continue;
506 
507     W.startLine() << "Section (index: " << Index << ") " << Sec.getName()
508                   << " {\n";
509     W.indent();
510 
511     for (const RelTy Reloc : Relocations)
512       printRelocation(Reloc);
513 
514     W.unindent();
515     W.startLine() << "}\n";
516   }
517 }
518 
519 const EnumEntry<XCOFF::CFileStringType> FileStringType[] = {
520 #define ECase(X)                                                               \
521   { #X, XCOFF::X }
522     ECase(XFT_FN), ECase(XFT_CT), ECase(XFT_CV), ECase(XFT_CD)
523 #undef ECase
524 };
525 
526 const EnumEntry<XCOFF::SymbolAuxType> SymAuxType[] = {
527 #define ECase(X)                                                               \
528   { #X, XCOFF::X }
529     ECase(AUX_EXCEPT), ECase(AUX_FCN), ECase(AUX_SYM), ECase(AUX_FILE),
530     ECase(AUX_CSECT),  ECase(AUX_SECT)
531 #undef ECase
532 };
533 
printFileAuxEnt(const XCOFFFileAuxEnt * AuxEntPtr)534 void XCOFFDumper::printFileAuxEnt(const XCOFFFileAuxEnt *AuxEntPtr) {
535   assert((!Obj.is64Bit() || AuxEntPtr->AuxType == XCOFF::AUX_FILE) &&
536          "Mismatched auxiliary type!");
537   StringRef FileName =
538       unwrapOrError(Obj.getFileName(), Obj.getCFileName(AuxEntPtr));
539   DictScope SymDs(W, "File Auxiliary Entry");
540   W.printNumber("Index",
541                 Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
542   W.printString("Name", FileName);
543   W.printEnum("Type", static_cast<uint8_t>(AuxEntPtr->Type),
544               ArrayRef(FileStringType));
545   if (Obj.is64Bit()) {
546     W.printEnum("Auxiliary Type", static_cast<uint8_t>(AuxEntPtr->AuxType),
547                 ArrayRef(SymAuxType));
548   }
549 }
550 
551 static const EnumEntry<XCOFF::StorageMappingClass> CsectStorageMappingClass[] =
552     {
553 #define ECase(X)                                                               \
554   { #X, XCOFF::X }
555         ECase(XMC_PR), ECase(XMC_RO), ECase(XMC_DB),   ECase(XMC_GL),
556         ECase(XMC_XO), ECase(XMC_SV), ECase(XMC_SV64), ECase(XMC_SV3264),
557         ECase(XMC_TI), ECase(XMC_TB), ECase(XMC_RW),   ECase(XMC_TC0),
558         ECase(XMC_TC), ECase(XMC_TD), ECase(XMC_DS),   ECase(XMC_UA),
559         ECase(XMC_BS), ECase(XMC_UC), ECase(XMC_TL),   ECase(XMC_UL),
560         ECase(XMC_TE)
561 #undef ECase
562 };
563 
564 const EnumEntry<XCOFF::SymbolType> CsectSymbolTypeClass[] = {
565 #define ECase(X)                                                               \
566   { #X, XCOFF::X }
567     ECase(XTY_ER), ECase(XTY_SD), ECase(XTY_LD), ECase(XTY_CM)
568 #undef ECase
569 };
570 
printCsectAuxEnt(XCOFFCsectAuxRef AuxEntRef)571 void XCOFFDumper::printCsectAuxEnt(XCOFFCsectAuxRef AuxEntRef) {
572   assert((!Obj.is64Bit() || AuxEntRef.getAuxType64() == XCOFF::AUX_CSECT) &&
573          "Mismatched auxiliary type!");
574 
575   DictScope SymDs(W, "CSECT Auxiliary Entry");
576   W.printNumber("Index", Obj.getSymbolIndex(AuxEntRef.getEntryAddress()));
577   W.printNumber(AuxEntRef.isLabel() ? "ContainingCsectSymbolIndex"
578                                     : "SectionLen",
579                 AuxEntRef.getSectionOrLength());
580   W.printHex("ParameterHashIndex", AuxEntRef.getParameterHashIndex());
581   W.printHex("TypeChkSectNum", AuxEntRef.getTypeChkSectNum());
582   // Print out symbol alignment and type.
583   W.printNumber("SymbolAlignmentLog2", AuxEntRef.getAlignmentLog2());
584   W.printEnum("SymbolType", AuxEntRef.getSymbolType(),
585               ArrayRef(CsectSymbolTypeClass));
586   W.printEnum("StorageMappingClass",
587               static_cast<uint8_t>(AuxEntRef.getStorageMappingClass()),
588               ArrayRef(CsectStorageMappingClass));
589 
590   if (Obj.is64Bit()) {
591     W.printEnum("Auxiliary Type", static_cast<uint8_t>(XCOFF::AUX_CSECT),
592                 ArrayRef(SymAuxType));
593   } else {
594     W.printHex("StabInfoIndex", AuxEntRef.getStabInfoIndex32());
595     W.printHex("StabSectNum", AuxEntRef.getStabSectNum32());
596   }
597 }
598 
printSectAuxEntForStat(const XCOFFSectAuxEntForStat * AuxEntPtr)599 void XCOFFDumper::printSectAuxEntForStat(
600     const XCOFFSectAuxEntForStat *AuxEntPtr) {
601   assert(!Obj.is64Bit() && "32-bit interface called on 64-bit object file.");
602 
603   DictScope SymDs(W, "Sect Auxiliary Entry For Stat");
604   W.printNumber("Index",
605                 Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
606   W.printNumber("SectionLength", AuxEntPtr->SectionLength);
607 
608   // Unlike the corresponding fields in the section header, NumberOfRelocEnt
609   // and NumberOfLineNum do not handle values greater than 65535.
610   W.printNumber("NumberOfRelocEnt", AuxEntPtr->NumberOfRelocEnt);
611   W.printNumber("NumberOfLineNum", AuxEntPtr->NumberOfLineNum);
612 }
613 
printExceptionAuxEnt(const XCOFFExceptionAuxEnt * AuxEntPtr)614 void XCOFFDumper::printExceptionAuxEnt(const XCOFFExceptionAuxEnt *AuxEntPtr) {
615   assert(Obj.is64Bit() && "64-bit interface called on 32-bit object file.");
616 
617   DictScope SymDs(W, "Exception Auxiliary Entry");
618   W.printNumber("Index",
619                 Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
620   W.printHex("OffsetToExceptionTable", AuxEntPtr->OffsetToExceptionTbl);
621   W.printHex("SizeOfFunction", AuxEntPtr->SizeOfFunction);
622   W.printNumber("SymbolIndexOfNextBeyond", AuxEntPtr->SymIdxOfNextBeyond);
623   W.printEnum("Auxiliary Type", static_cast<uint8_t>(AuxEntPtr->AuxType),
624               ArrayRef(SymAuxType));
625 }
626 
printFunctionAuxEnt(const XCOFFFunctionAuxEnt32 * AuxEntPtr)627 void XCOFFDumper::printFunctionAuxEnt(const XCOFFFunctionAuxEnt32 *AuxEntPtr) {
628   assert(!Obj.is64Bit() && "32-bit interface called on 64-bit object file.");
629 
630   DictScope SymDs(W, "Function Auxiliary Entry");
631   W.printNumber("Index",
632                 Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
633   W.printHex("OffsetToExceptionTable", AuxEntPtr->OffsetToExceptionTbl);
634   W.printHex("SizeOfFunction", AuxEntPtr->SizeOfFunction);
635   W.printHex("PointerToLineNum", AuxEntPtr->PtrToLineNum);
636   W.printNumber("SymbolIndexOfNextBeyond", AuxEntPtr->SymIdxOfNextBeyond);
637 }
638 
printFunctionAuxEnt(const XCOFFFunctionAuxEnt64 * AuxEntPtr)639 void XCOFFDumper::printFunctionAuxEnt(const XCOFFFunctionAuxEnt64 *AuxEntPtr) {
640   assert(Obj.is64Bit() && "64-bit interface called on 32-bit object file.");
641 
642   DictScope SymDs(W, "Function Auxiliary Entry");
643   W.printNumber("Index",
644                 Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
645   W.printHex("SizeOfFunction", AuxEntPtr->SizeOfFunction);
646   W.printHex("PointerToLineNum", AuxEntPtr->PtrToLineNum);
647   W.printNumber("SymbolIndexOfNextBeyond", AuxEntPtr->SymIdxOfNextBeyond);
648   W.printEnum("Auxiliary Type", static_cast<uint8_t>(AuxEntPtr->AuxType),
649               ArrayRef(SymAuxType));
650 }
651 
printBlockAuxEnt(const XCOFFBlockAuxEnt32 * AuxEntPtr)652 void XCOFFDumper::printBlockAuxEnt(const XCOFFBlockAuxEnt32 *AuxEntPtr) {
653   assert(!Obj.is64Bit() && "32-bit interface called on 64-bit object file.");
654 
655   DictScope SymDs(W, "Block Auxiliary Entry");
656   W.printNumber("Index",
657                 Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
658   W.printHex("LineNumber (High 2 Bytes)", AuxEntPtr->LineNumHi);
659   W.printHex("LineNumber (Low 2 Bytes)", AuxEntPtr->LineNumLo);
660 }
661 
printBlockAuxEnt(const XCOFFBlockAuxEnt64 * AuxEntPtr)662 void XCOFFDumper::printBlockAuxEnt(const XCOFFBlockAuxEnt64 *AuxEntPtr) {
663   assert(Obj.is64Bit() && "64-bit interface called on 32-bit object file.");
664 
665   DictScope SymDs(W, "Block Auxiliary Entry");
666   W.printNumber("Index",
667                 Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
668   W.printHex("LineNumber", AuxEntPtr->LineNum);
669   W.printEnum("Auxiliary Type", static_cast<uint8_t>(AuxEntPtr->AuxType),
670               ArrayRef(SymAuxType));
671 }
672 
673 template <typename T>
printSectAuxEntForDWARF(const T * AuxEntPtr)674 void XCOFFDumper::printSectAuxEntForDWARF(const T *AuxEntPtr) {
675   DictScope SymDs(W, "Sect Auxiliary Entry For DWARF");
676   W.printNumber("Index",
677                 Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
678   W.printHex("LengthOfSectionPortion", AuxEntPtr->LengthOfSectionPortion);
679   W.printNumber("NumberOfRelocEntries", AuxEntPtr->NumberOfRelocEnt);
680   if (Obj.is64Bit())
681     W.printEnum("Auxiliary Type", static_cast<uint8_t>(XCOFF::AUX_SECT),
682                 ArrayRef(SymAuxType));
683 }
684 
GetSymbolValueName(XCOFF::StorageClass SC)685 static StringRef GetSymbolValueName(XCOFF::StorageClass SC) {
686   switch (SC) {
687   case XCOFF::C_EXT:
688   case XCOFF::C_WEAKEXT:
689   case XCOFF::C_HIDEXT:
690   case XCOFF::C_STAT:
691   case XCOFF::C_FCN:
692   case XCOFF::C_BLOCK:
693     return "Value (RelocatableAddress)";
694   case XCOFF::C_FILE:
695     return "Value (SymbolTableIndex)";
696   case XCOFF::C_DWARF:
697     return "Value (OffsetInDWARF)";
698   case XCOFF::C_FUN:
699   case XCOFF::C_STSYM:
700   case XCOFF::C_BINCL:
701   case XCOFF::C_EINCL:
702   case XCOFF::C_INFO:
703   case XCOFF::C_BSTAT:
704   case XCOFF::C_LSYM:
705   case XCOFF::C_PSYM:
706   case XCOFF::C_RPSYM:
707   case XCOFF::C_RSYM:
708   case XCOFF::C_ECOML:
709     assert(false && "This StorageClass for the symbol is not yet implemented.");
710     return "";
711   default:
712     return "Value";
713   }
714 }
715 
716 const EnumEntry<XCOFF::CFileLangId> CFileLangIdClass[] = {
717 #define ECase(X)                                                               \
718   { #X, XCOFF::X }
719     ECase(TB_C), ECase(TB_Fortran), ECase(TB_CPLUSPLUS)
720 #undef ECase
721 };
722 
723 const EnumEntry<XCOFF::CFileCpuId> CFileCpuIdClass[] = {
724 #define ECase(X)                                                               \
725   { #X, XCOFF::X }
726     ECase(TCPU_PPC64), ECase(TCPU_COM), ECase(TCPU_970)
727 #undef ECase
728 };
729 
getAuxEntPtr(uintptr_t AuxAddress)730 template <typename T> const T *XCOFFDumper::getAuxEntPtr(uintptr_t AuxAddress) {
731   const T *AuxEntPtr = reinterpret_cast<const T *>(AuxAddress);
732   Obj.checkSymbolEntryPointer(reinterpret_cast<uintptr_t>(AuxEntPtr));
733   return AuxEntPtr;
734 }
735 
printUnexpectedRawAuxEnt(ScopedPrinter & W,uintptr_t AuxAddress)736 static void printUnexpectedRawAuxEnt(ScopedPrinter &W, uintptr_t AuxAddress) {
737   W.startLine() << "!Unexpected raw auxiliary entry data:\n";
738   W.startLine() << format_bytes(
739                        ArrayRef<uint8_t>(
740                            reinterpret_cast<const uint8_t *>(AuxAddress),
741                            XCOFF::SymbolTableEntrySize),
742                        std::nullopt, XCOFF::SymbolTableEntrySize)
743                 << "\n";
744 }
745 
printSymbol(const SymbolRef & S)746 void XCOFFDumper::printSymbol(const SymbolRef &S) {
747   DataRefImpl SymbolDRI = S.getRawDataRefImpl();
748   XCOFFSymbolRef SymbolEntRef = Obj.toSymbolRef(SymbolDRI);
749 
750   uint8_t NumberOfAuxEntries = SymbolEntRef.getNumberOfAuxEntries();
751 
752   DictScope SymDs(W, "Symbol");
753 
754   StringRef SymbolName =
755       unwrapOrError(Obj.getFileName(), SymbolEntRef.getName());
756 
757   uint32_t SymbolIdx = Obj.getSymbolIndex(SymbolEntRef.getEntryAddress());
758   XCOFF::StorageClass SymbolClass = SymbolEntRef.getStorageClass();
759 
760   W.printNumber("Index", SymbolIdx);
761   W.printString("Name", opts::Demangle ? demangle(SymbolName) : SymbolName);
762   W.printHex(GetSymbolValueName(SymbolClass), SymbolEntRef.getValue());
763 
764   StringRef SectionName =
765       unwrapOrError(Obj.getFileName(), Obj.getSymbolSectionName(SymbolEntRef));
766 
767   W.printString("Section", SectionName);
768   if (SymbolClass == XCOFF::C_FILE) {
769     W.printEnum("Source Language ID", SymbolEntRef.getLanguageIdForCFile(),
770                 ArrayRef(CFileLangIdClass));
771     W.printEnum("CPU Version ID", SymbolEntRef.getCPUTypeIddForCFile(),
772                 ArrayRef(CFileCpuIdClass));
773   } else
774     W.printHex("Type", SymbolEntRef.getSymbolType());
775 
776   W.printEnum("StorageClass", static_cast<uint8_t>(SymbolClass),
777               ArrayRef(SymStorageClass));
778   W.printNumber("NumberOfAuxEntries", NumberOfAuxEntries);
779 
780   if (NumberOfAuxEntries == 0)
781     return;
782 
783   auto checkNumOfAux = [=] {
784     if (NumberOfAuxEntries > 1)
785       reportUniqueWarning("the " +
786                           enumToString(static_cast<uint8_t>(SymbolClass),
787                                        ArrayRef(SymStorageClass)) +
788                           " symbol at index " + Twine(SymbolIdx) +
789                           " should not have more than 1 "
790                           "auxiliary entry");
791   };
792 
793   switch (SymbolClass) {
794   case XCOFF::C_FILE:
795     // If the symbol is C_FILE and has auxiliary entries...
796     for (int I = 1; I <= NumberOfAuxEntries; I++) {
797       uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
798           SymbolEntRef.getEntryAddress(), I);
799 
800       if (Obj.is64Bit() &&
801           *Obj.getSymbolAuxType(AuxAddress) != XCOFF::SymbolAuxType::AUX_FILE) {
802         printUnexpectedRawAuxEnt(W, AuxAddress);
803         continue;
804       }
805 
806       const XCOFFFileAuxEnt *FileAuxEntPtr =
807           getAuxEntPtr<XCOFFFileAuxEnt>(AuxAddress);
808       printFileAuxEnt(FileAuxEntPtr);
809     }
810     break;
811   case XCOFF::C_EXT:
812   case XCOFF::C_WEAKEXT:
813   case XCOFF::C_HIDEXT: {
814     // For 32-bit objects, print the function auxiliary symbol table entry. The
815     // last one must be a CSECT auxiliary entry.
816     // For 64-bit objects, both a function auxiliary entry and an exception
817     // auxiliary entry may appear, print them in the loop and skip printing the
818     // CSECT auxiliary entry, which will be printed outside the loop.
819     for (int I = 1; I <= NumberOfAuxEntries; I++) {
820       if (I == NumberOfAuxEntries && !Obj.is64Bit())
821         break;
822 
823       uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
824           SymbolEntRef.getEntryAddress(), I);
825 
826       if (Obj.is64Bit()) {
827         XCOFF::SymbolAuxType Type = *Obj.getSymbolAuxType(AuxAddress);
828         if (Type == XCOFF::SymbolAuxType::AUX_CSECT)
829           continue;
830         if (Type == XCOFF::SymbolAuxType::AUX_FCN) {
831           const XCOFFFunctionAuxEnt64 *AuxEntPtr =
832               getAuxEntPtr<XCOFFFunctionAuxEnt64>(AuxAddress);
833           printFunctionAuxEnt(AuxEntPtr);
834         } else if (Type == XCOFF::SymbolAuxType::AUX_EXCEPT) {
835           const XCOFFExceptionAuxEnt *AuxEntPtr =
836               getAuxEntPtr<XCOFFExceptionAuxEnt>(AuxAddress);
837           printExceptionAuxEnt(AuxEntPtr);
838         } else {
839           printUnexpectedRawAuxEnt(W, AuxAddress);
840         }
841       } else {
842         const XCOFFFunctionAuxEnt32 *AuxEntPtr =
843             getAuxEntPtr<XCOFFFunctionAuxEnt32>(AuxAddress);
844         printFunctionAuxEnt(AuxEntPtr);
845       }
846     }
847 
848     // Print the CSECT auxiliary entry.
849     auto ErrOrCsectAuxRef = SymbolEntRef.getXCOFFCsectAuxRef();
850     if (!ErrOrCsectAuxRef)
851       reportUniqueWarning(ErrOrCsectAuxRef.takeError());
852     else
853       printCsectAuxEnt(*ErrOrCsectAuxRef);
854 
855     break;
856   }
857   case XCOFF::C_STAT: {
858     checkNumOfAux();
859 
860     const XCOFFSectAuxEntForStat *StatAuxEntPtr =
861         getAuxEntPtr<XCOFFSectAuxEntForStat>(
862             XCOFFObjectFile::getAdvancedSymbolEntryAddress(
863                 SymbolEntRef.getEntryAddress(), 1));
864     printSectAuxEntForStat(StatAuxEntPtr);
865     break;
866   }
867   case XCOFF::C_DWARF: {
868     checkNumOfAux();
869 
870     uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
871         SymbolEntRef.getEntryAddress(), 1);
872 
873     if (Obj.is64Bit()) {
874       const XCOFFSectAuxEntForDWARF64 *AuxEntPtr =
875           getAuxEntPtr<XCOFFSectAuxEntForDWARF64>(AuxAddress);
876       printSectAuxEntForDWARF<XCOFFSectAuxEntForDWARF64>(AuxEntPtr);
877     } else {
878       const XCOFFSectAuxEntForDWARF32 *AuxEntPtr =
879           getAuxEntPtr<XCOFFSectAuxEntForDWARF32>(AuxAddress);
880       printSectAuxEntForDWARF<XCOFFSectAuxEntForDWARF32>(AuxEntPtr);
881     }
882     break;
883   }
884   case XCOFF::C_BLOCK:
885   case XCOFF::C_FCN: {
886     checkNumOfAux();
887 
888     uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
889         SymbolEntRef.getEntryAddress(), 1);
890 
891     if (Obj.is64Bit()) {
892       const XCOFFBlockAuxEnt64 *AuxEntPtr =
893           getAuxEntPtr<XCOFFBlockAuxEnt64>(AuxAddress);
894       printBlockAuxEnt(AuxEntPtr);
895     } else {
896       const XCOFFBlockAuxEnt32 *AuxEntPtr =
897           getAuxEntPtr<XCOFFBlockAuxEnt32>(AuxAddress);
898       printBlockAuxEnt(AuxEntPtr);
899     }
900     break;
901   }
902   default:
903     for (int i = 1; i <= NumberOfAuxEntries; i++) {
904       printUnexpectedRawAuxEnt(W,
905                                XCOFFObjectFile::getAdvancedSymbolEntryAddress(
906                                    SymbolEntRef.getEntryAddress(), i));
907     }
908     break;
909   }
910 }
911 
printSymbols(bool)912 void XCOFFDumper::printSymbols(bool /*ExtraSymInfo*/) {
913   ListScope Group(W, "Symbols");
914   for (const SymbolRef &S : Obj.symbols())
915     printSymbol(S);
916 }
917 
printStringTable()918 void XCOFFDumper::printStringTable() {
919   DictScope DS(W, "StringTable");
920   StringRef StrTable = Obj.getStringTable();
921   uint32_t StrTabSize = StrTable.size();
922   W.printNumber("Length", StrTabSize);
923   // Print strings from the fifth byte, since the first four bytes contain the
924   // length (in bytes) of the string table (including the length field).
925   if (StrTabSize > 4)
926     printAsStringList(StrTable, 4);
927 }
928 
printDynamicSymbols()929 void XCOFFDumper::printDynamicSymbols() {
930   llvm_unreachable("Unimplemented functionality for XCOFFDumper");
931 }
932 
printUnwindInfo()933 void XCOFFDumper::printUnwindInfo() {
934   llvm_unreachable("Unimplemented functionality for XCOFFDumper");
935 }
936 
printStackMap() const937 void XCOFFDumper::printStackMap() const {
938   llvm_unreachable("Unimplemented functionality for XCOFFDumper");
939 }
940 
printNeededLibraries()941 void XCOFFDumper::printNeededLibraries() {
942   ListScope D(W, "NeededLibraries");
943   auto ImportFilesOrError = Obj.getImportFileTable();
944   if (!ImportFilesOrError) {
945     reportUniqueWarning(ImportFilesOrError.takeError());
946     return;
947   }
948 
949   StringRef ImportFileTable = ImportFilesOrError.get();
950   const char *CurrentStr = ImportFileTable.data();
951   const char *TableEnd = ImportFileTable.end();
952   // Default column width for names is 13 even if no names are that long.
953   size_t BaseWidth = 13;
954 
955   // Get the max width of BASE columns.
956   for (size_t StrIndex = 0; CurrentStr < TableEnd; ++StrIndex) {
957     size_t CurrentLen = strlen(CurrentStr);
958     CurrentStr += strlen(CurrentStr) + 1;
959     if (StrIndex % 3 == 1)
960       BaseWidth = std::max(BaseWidth, CurrentLen);
961   }
962 
963   auto &OS = static_cast<formatted_raw_ostream &>(W.startLine());
964   // Each entry consists of 3 strings: the path_name, base_name and
965   // archive_member_name. The first entry is a default LIBPATH value and other
966   // entries have no path_name. We just dump the base_name and
967   // archive_member_name here.
968   OS << left_justify("BASE", BaseWidth)  << " MEMBER\n";
969   CurrentStr = ImportFileTable.data();
970   for (size_t StrIndex = 0; CurrentStr < TableEnd;
971        ++StrIndex, CurrentStr += strlen(CurrentStr) + 1) {
972     if (StrIndex >= 3 && StrIndex % 3 != 0) {
973       if (StrIndex % 3 == 1)
974         OS << "  " << left_justify(CurrentStr, BaseWidth) << " ";
975       else
976         OS << CurrentStr << "\n";
977     }
978   }
979 }
980 
981 const EnumEntry<XCOFF::SectionTypeFlags> SectionTypeFlagsNames[] = {
982 #define ECase(X)                                                               \
983   { #X, XCOFF::X }
984     ECase(STYP_PAD),    ECase(STYP_DWARF), ECase(STYP_TEXT),
985     ECase(STYP_DATA),   ECase(STYP_BSS),   ECase(STYP_EXCEPT),
986     ECase(STYP_INFO),   ECase(STYP_TDATA), ECase(STYP_TBSS),
987     ECase(STYP_LOADER), ECase(STYP_DEBUG), ECase(STYP_TYPCHK),
988     ECase(STYP_OVRFLO)
989 #undef ECase
990 };
991 
992 const EnumEntry<XCOFF::DwarfSectionSubtypeFlags>
993     DWARFSectionSubtypeFlagsNames[] = {
994 #define ECase(X)                                                               \
995   { #X, XCOFF::X }
996         ECase(SSUBTYP_DWINFO),  ECase(SSUBTYP_DWLINE),  ECase(SSUBTYP_DWPBNMS),
997         ECase(SSUBTYP_DWPBTYP), ECase(SSUBTYP_DWARNGE), ECase(SSUBTYP_DWABREV),
998         ECase(SSUBTYP_DWSTR),   ECase(SSUBTYP_DWRNGES), ECase(SSUBTYP_DWLOC),
999         ECase(SSUBTYP_DWFRAME), ECase(SSUBTYP_DWMAC)
1000 #undef ECase
1001 };
1002 
1003 template <typename T>
printOverflowSectionHeader(T & Sec) const1004 void XCOFFDumper::printOverflowSectionHeader(T &Sec) const {
1005   if (Obj.is64Bit()) {
1006     reportWarning(make_error<StringError>("An 64-bit XCOFF object file may not "
1007                                           "contain an overflow section header.",
1008                                           object_error::parse_failed),
1009                   Obj.getFileName());
1010   }
1011 
1012   W.printString("Name", Sec.getName());
1013   W.printNumber("NumberOfRelocations", Sec.PhysicalAddress);
1014   W.printNumber("NumberOfLineNumbers", Sec.VirtualAddress);
1015   W.printHex("Size", Sec.SectionSize);
1016   W.printHex("RawDataOffset", Sec.FileOffsetToRawData);
1017   W.printHex("RelocationPointer", Sec.FileOffsetToRelocationInfo);
1018   W.printHex("LineNumberPointer", Sec.FileOffsetToLineNumberInfo);
1019   W.printNumber("IndexOfSectionOverflowed", Sec.NumberOfRelocations);
1020   W.printNumber("IndexOfSectionOverflowed", Sec.NumberOfLineNumbers);
1021 }
1022 
1023 template <typename T>
printGenericSectionHeader(T & Sec) const1024 void XCOFFDumper::printGenericSectionHeader(T &Sec) const {
1025   W.printString("Name", Sec.getName());
1026   W.printHex("PhysicalAddress", Sec.PhysicalAddress);
1027   W.printHex("VirtualAddress", Sec.VirtualAddress);
1028   W.printHex("Size", Sec.SectionSize);
1029   W.printHex("RawDataOffset", Sec.FileOffsetToRawData);
1030   W.printHex("RelocationPointer", Sec.FileOffsetToRelocationInfo);
1031   W.printHex("LineNumberPointer", Sec.FileOffsetToLineNumberInfo);
1032   W.printNumber("NumberOfRelocations", Sec.NumberOfRelocations);
1033   W.printNumber("NumberOfLineNumbers", Sec.NumberOfLineNumbers);
1034 }
1035 
1036 enum PrintStyle { Hex, Number };
1037 template <typename T, typename V>
printAuxMemberHelper(PrintStyle Style,const char * MemberName,const T & Member,const V * AuxHeader,uint16_t AuxSize,uint16_t & PartialFieldOffset,const char * & PartialFieldName,ScopedPrinter & W)1038 static void printAuxMemberHelper(PrintStyle Style, const char *MemberName,
1039                                  const T &Member, const V *AuxHeader,
1040                                  uint16_t AuxSize, uint16_t &PartialFieldOffset,
1041                                  const char *&PartialFieldName,
1042                                  ScopedPrinter &W) {
1043   ptrdiff_t Offset = reinterpret_cast<const char *>(&Member) -
1044                      reinterpret_cast<const char *>(AuxHeader);
1045   if (Offset + sizeof(Member) <= AuxSize)
1046     Style == Hex ? W.printHex(MemberName, Member)
1047                  : W.printNumber(MemberName, Member);
1048   else if (Offset < AuxSize) {
1049     PartialFieldOffset = Offset;
1050     PartialFieldName = MemberName;
1051   }
1052 }
1053 
1054 template <class T>
checkAndPrintAuxHeaderParseError(const char * PartialFieldName,uint16_t PartialFieldOffset,uint16_t AuxSize,T & AuxHeader,XCOFFDumper * Dumper)1055 void checkAndPrintAuxHeaderParseError(const char *PartialFieldName,
1056                                       uint16_t PartialFieldOffset,
1057                                       uint16_t AuxSize, T &AuxHeader,
1058                                       XCOFFDumper *Dumper) {
1059   if (PartialFieldOffset < AuxSize) {
1060     Dumper->reportUniqueWarning(Twine("only partial field for ") +
1061                                 PartialFieldName + " at offset (" +
1062                                 Twine(PartialFieldOffset) + ")");
1063     Dumper->getScopedPrinter().printBinary(
1064         "Raw data", "",
1065         ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(&AuxHeader) +
1066                               PartialFieldOffset,
1067                           AuxSize - PartialFieldOffset));
1068   } else if (sizeof(AuxHeader) < AuxSize)
1069     Dumper->getScopedPrinter().printBinary(
1070         "Extra raw data", "",
1071         ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(&AuxHeader) +
1072                               sizeof(AuxHeader),
1073                           AuxSize - sizeof(AuxHeader)));
1074 }
1075 
printAuxiliaryHeader(const XCOFFAuxiliaryHeader32 * AuxHeader)1076 void XCOFFDumper::printAuxiliaryHeader(
1077     const XCOFFAuxiliaryHeader32 *AuxHeader) {
1078   if (AuxHeader == nullptr)
1079     return;
1080   uint16_t AuxSize = Obj.getOptionalHeaderSize();
1081   uint16_t PartialFieldOffset = AuxSize;
1082   const char *PartialFieldName = nullptr;
1083 
1084   auto PrintAuxMember = [&](PrintStyle Style, const char *MemberName,
1085                             auto &Member) {
1086     printAuxMemberHelper(Style, MemberName, Member, AuxHeader, AuxSize,
1087                          PartialFieldOffset, PartialFieldName, W);
1088   };
1089 
1090   PrintAuxMember(Hex, "Magic", AuxHeader->AuxMagic);
1091   PrintAuxMember(Hex, "Version", AuxHeader->Version);
1092   PrintAuxMember(Hex, "Size of .text section", AuxHeader->TextSize);
1093   PrintAuxMember(Hex, "Size of .data section", AuxHeader->InitDataSize);
1094   PrintAuxMember(Hex, "Size of .bss section", AuxHeader->BssDataSize);
1095   PrintAuxMember(Hex, "Entry point address", AuxHeader->EntryPointAddr);
1096   PrintAuxMember(Hex, ".text section start address", AuxHeader->TextStartAddr);
1097   PrintAuxMember(Hex, ".data section start address", AuxHeader->DataStartAddr);
1098   PrintAuxMember(Hex, "TOC anchor address", AuxHeader->TOCAnchorAddr);
1099   PrintAuxMember(Number, "Section number of entryPoint",
1100                  AuxHeader->SecNumOfEntryPoint);
1101   PrintAuxMember(Number, "Section number of .text", AuxHeader->SecNumOfText);
1102   PrintAuxMember(Number, "Section number of .data", AuxHeader->SecNumOfData);
1103   PrintAuxMember(Number, "Section number of TOC", AuxHeader->SecNumOfTOC);
1104   PrintAuxMember(Number, "Section number of loader data",
1105                  AuxHeader->SecNumOfLoader);
1106   PrintAuxMember(Number, "Section number of .bss", AuxHeader->SecNumOfBSS);
1107   PrintAuxMember(Hex, "Maxium alignment of .text", AuxHeader->MaxAlignOfText);
1108   PrintAuxMember(Hex, "Maxium alignment of .data", AuxHeader->MaxAlignOfData);
1109   PrintAuxMember(Hex, "Module type", AuxHeader->ModuleType);
1110   PrintAuxMember(Hex, "CPU type of objects", AuxHeader->CpuFlag);
1111   PrintAuxMember(Hex, "(Reserved)", AuxHeader->CpuType);
1112   PrintAuxMember(Hex, "Maximum stack size", AuxHeader->MaxStackSize);
1113   PrintAuxMember(Hex, "Maximum data size", AuxHeader->MaxDataSize);
1114   PrintAuxMember(Hex, "Reserved for debugger", AuxHeader->ReservedForDebugger);
1115   PrintAuxMember(Hex, "Text page size", AuxHeader->TextPageSize);
1116   PrintAuxMember(Hex, "Data page size", AuxHeader->DataPageSize);
1117   PrintAuxMember(Hex, "Stack page size", AuxHeader->StackPageSize);
1118   if (offsetof(XCOFFAuxiliaryHeader32, FlagAndTDataAlignment) +
1119           sizeof(XCOFFAuxiliaryHeader32::FlagAndTDataAlignment) <=
1120       AuxSize) {
1121     W.printHex("Flag", AuxHeader->getFlag());
1122     W.printHex("Alignment of thread-local storage",
1123                AuxHeader->getTDataAlignment());
1124   }
1125 
1126   PrintAuxMember(Number, "Section number for .tdata", AuxHeader->SecNumOfTData);
1127   PrintAuxMember(Number, "Section number for .tbss", AuxHeader->SecNumOfTBSS);
1128 
1129   checkAndPrintAuxHeaderParseError(PartialFieldName, PartialFieldOffset,
1130                                    AuxSize, *AuxHeader, this);
1131 }
1132 
printAuxiliaryHeader(const XCOFFAuxiliaryHeader64 * AuxHeader)1133 void XCOFFDumper::printAuxiliaryHeader(
1134     const XCOFFAuxiliaryHeader64 *AuxHeader) {
1135   if (AuxHeader == nullptr)
1136     return;
1137   uint16_t AuxSize = Obj.getOptionalHeaderSize();
1138   uint16_t PartialFieldOffset = AuxSize;
1139   const char *PartialFieldName = nullptr;
1140 
1141   auto PrintAuxMember = [&](PrintStyle Style, const char *MemberName,
1142                             auto &Member) {
1143     printAuxMemberHelper(Style, MemberName, Member, AuxHeader, AuxSize,
1144                          PartialFieldOffset, PartialFieldName, W);
1145   };
1146 
1147   PrintAuxMember(Hex, "Magic", AuxHeader->AuxMagic);
1148   PrintAuxMember(Hex, "Version", AuxHeader->Version);
1149   PrintAuxMember(Hex, "Reserved for debugger", AuxHeader->ReservedForDebugger);
1150   PrintAuxMember(Hex, ".text section start address", AuxHeader->TextStartAddr);
1151   PrintAuxMember(Hex, ".data section start address", AuxHeader->DataStartAddr);
1152   PrintAuxMember(Hex, "TOC anchor address", AuxHeader->TOCAnchorAddr);
1153   PrintAuxMember(Number, "Section number of entryPoint",
1154                  AuxHeader->SecNumOfEntryPoint);
1155   PrintAuxMember(Number, "Section number of .text", AuxHeader->SecNumOfText);
1156   PrintAuxMember(Number, "Section number of .data", AuxHeader->SecNumOfData);
1157   PrintAuxMember(Number, "Section number of TOC", AuxHeader->SecNumOfTOC);
1158   PrintAuxMember(Number, "Section number of loader data",
1159                  AuxHeader->SecNumOfLoader);
1160   PrintAuxMember(Number, "Section number of .bss", AuxHeader->SecNumOfBSS);
1161   PrintAuxMember(Hex, "Maxium alignment of .text", AuxHeader->MaxAlignOfText);
1162   PrintAuxMember(Hex, "Maxium alignment of .data", AuxHeader->MaxAlignOfData);
1163   PrintAuxMember(Hex, "Module type", AuxHeader->ModuleType);
1164   PrintAuxMember(Hex, "CPU type of objects", AuxHeader->CpuFlag);
1165   PrintAuxMember(Hex, "(Reserved)", AuxHeader->CpuType);
1166   PrintAuxMember(Hex, "Text page size", AuxHeader->TextPageSize);
1167   PrintAuxMember(Hex, "Data page size", AuxHeader->DataPageSize);
1168   PrintAuxMember(Hex, "Stack page size", AuxHeader->StackPageSize);
1169   if (offsetof(XCOFFAuxiliaryHeader64, FlagAndTDataAlignment) +
1170           sizeof(XCOFFAuxiliaryHeader64::FlagAndTDataAlignment) <=
1171       AuxSize) {
1172     W.printHex("Flag", AuxHeader->getFlag());
1173     W.printHex("Alignment of thread-local storage",
1174                AuxHeader->getTDataAlignment());
1175   }
1176   PrintAuxMember(Hex, "Size of .text section", AuxHeader->TextSize);
1177   PrintAuxMember(Hex, "Size of .data section", AuxHeader->InitDataSize);
1178   PrintAuxMember(Hex, "Size of .bss section", AuxHeader->BssDataSize);
1179   PrintAuxMember(Hex, "Entry point address", AuxHeader->EntryPointAddr);
1180   PrintAuxMember(Hex, "Maximum stack size", AuxHeader->MaxStackSize);
1181   PrintAuxMember(Hex, "Maximum data size", AuxHeader->MaxDataSize);
1182   PrintAuxMember(Number, "Section number for .tdata", AuxHeader->SecNumOfTData);
1183   PrintAuxMember(Number, "Section number for .tbss", AuxHeader->SecNumOfTBSS);
1184   PrintAuxMember(Hex, "Additional flags 64-bit XCOFF", AuxHeader->XCOFF64Flag);
1185 
1186   checkAndPrintAuxHeaderParseError(PartialFieldName, PartialFieldOffset,
1187                                    AuxSize, *AuxHeader, this);
1188 }
1189 
1190 template <typename T>
printSectionHeaders(ArrayRef<T> Sections)1191 void XCOFFDumper::printSectionHeaders(ArrayRef<T> Sections) {
1192   ListScope Group(W, "Sections");
1193 
1194   uint16_t Index = 1;
1195   for (const T &Sec : Sections) {
1196     DictScope SecDS(W, "Section");
1197 
1198     W.printNumber("Index", Index++);
1199     uint16_t SectionType = Sec.getSectionType();
1200     int32_t SectionSubtype = Sec.getSectionSubtype();
1201     switch (SectionType) {
1202     case XCOFF::STYP_OVRFLO:
1203       printOverflowSectionHeader(Sec);
1204       break;
1205     case XCOFF::STYP_LOADER:
1206     case XCOFF::STYP_EXCEPT:
1207     case XCOFF::STYP_TYPCHK:
1208       // TODO The interpretation of loader, exception and type check section
1209       // headers are different from that of generic section headers. We will
1210       // implement them later. We interpret them as generic section headers for
1211       // now.
1212     default:
1213       printGenericSectionHeader(Sec);
1214       break;
1215     }
1216     if (Sec.isReservedSectionType())
1217       W.printHex("Flags", "Reserved", SectionType);
1218     else {
1219       W.printEnum("Type", SectionType, ArrayRef(SectionTypeFlagsNames));
1220       if (SectionType == XCOFF::STYP_DWARF) {
1221         W.printEnum("DWARFSubType", SectionSubtype,
1222                     ArrayRef(DWARFSectionSubtypeFlagsNames));
1223       }
1224     }
1225   }
1226 
1227   if (opts::SectionRelocations)
1228     report_fatal_error("Dumping section relocations is unimplemented");
1229 
1230   if (opts::SectionSymbols)
1231     report_fatal_error("Dumping symbols is unimplemented");
1232 
1233   if (opts::SectionData)
1234     report_fatal_error("Dumping section data is unimplemented");
1235 }
1236 
1237 namespace llvm {
1238 std::unique_ptr<ObjDumper>
createXCOFFDumper(const object::XCOFFObjectFile & XObj,ScopedPrinter & Writer)1239 createXCOFFDumper(const object::XCOFFObjectFile &XObj, ScopedPrinter &Writer) {
1240   return std::make_unique<XCOFFDumper>(XObj, Writer);
1241 }
1242 } // namespace llvm
1243