1 //===-- llvm-nm.cpp - Symbol table dumping utility for llvm ---------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This program is a utility that works like traditional Unix "nm", that is, it
11 // prints out the names of symbols in a bitcode or object file, along with some
12 // information about each symbol.
14 // This "nm" supports many of the features of GNU "nm", including its different
17 //===----------------------------------------------------------------------===//
19 #include "llvm/IR/Function.h"
20 #include "llvm/IR/GlobalAlias.h"
21 #include "llvm/IR/GlobalVariable.h"
22 #include "llvm/IR/LLVMContext.h"
23 #include "llvm/Object/Archive.h"
24 #include "llvm/Object/COFF.h"
25 #include "llvm/Object/ELFObjectFile.h"
26 #include "llvm/Object/IRObjectFile.h"
27 #include "llvm/Object/MachO.h"
28 #include "llvm/Object/MachOUniversal.h"
29 #include "llvm/Object/ObjectFile.h"
30 #include "llvm/Support/COFF.h"
31 #include "llvm/Support/CommandLine.h"
32 #include "llvm/Support/FileSystem.h"
33 #include "llvm/Support/Format.h"
34 #include "llvm/Support/ManagedStatic.h"
35 #include "llvm/Support/MemoryBuffer.h"
36 #include "llvm/Support/PrettyStackTrace.h"
37 #include "llvm/Support/Program.h"
38 #include "llvm/Support/Signals.h"
39 #include "llvm/Support/raw_ostream.h"
40 #include "llvm/Support/TargetSelect.h"
45 #include <system_error>
48 using namespace object;
51 enum OutputFormatTy { bsd, sysv, posix, darwin };
52 cl::opt<OutputFormatTy> OutputFormat(
53 "format", cl::desc("Specify output format"),
54 cl::values(clEnumVal(bsd, "BSD format"), clEnumVal(sysv, "System V format"),
55 clEnumVal(posix, "POSIX.2 format"),
56 clEnumVal(darwin, "Darwin -m format"), clEnumValEnd),
58 cl::alias OutputFormat2("f", cl::desc("Alias for --format"),
59 cl::aliasopt(OutputFormat));
61 cl::list<std::string> InputFilenames(cl::Positional, cl::desc("<input files>"),
64 cl::opt<bool> UndefinedOnly("undefined-only",
65 cl::desc("Show only undefined symbols"));
66 cl::alias UndefinedOnly2("u", cl::desc("Alias for --undefined-only"),
67 cl::aliasopt(UndefinedOnly));
69 cl::opt<bool> DynamicSyms("dynamic",
70 cl::desc("Display the dynamic symbols instead "
71 "of normal symbols."));
72 cl::alias DynamicSyms2("D", cl::desc("Alias for --dynamic"),
73 cl::aliasopt(DynamicSyms));
75 cl::opt<bool> DefinedOnly("defined-only",
76 cl::desc("Show only defined symbols"));
77 cl::alias DefinedOnly2("U", cl::desc("Alias for --defined-only"),
78 cl::aliasopt(DefinedOnly));
80 cl::opt<bool> ExternalOnly("extern-only",
81 cl::desc("Show only external symbols"));
82 cl::alias ExternalOnly2("g", cl::desc("Alias for --extern-only"),
83 cl::aliasopt(ExternalOnly));
85 cl::opt<bool> BSDFormat("B", cl::desc("Alias for --format=bsd"));
86 cl::opt<bool> POSIXFormat("P", cl::desc("Alias for --format=posix"));
87 cl::opt<bool> DarwinFormat("m", cl::desc("Alias for --format=darwin"));
89 static cl::list<std::string>
90 ArchFlags("arch", cl::desc("architecture(s) from a Mach-O file to dump"),
94 cl::opt<bool> PrintFileName(
96 cl::desc("Precede each symbol with the object file it came from"));
98 cl::alias PrintFileNameA("A", cl::desc("Alias for --print-file-name"),
99 cl::aliasopt(PrintFileName));
100 cl::alias PrintFileNameo("o", cl::desc("Alias for --print-file-name"),
101 cl::aliasopt(PrintFileName));
103 cl::opt<bool> DebugSyms("debug-syms",
104 cl::desc("Show all symbols, even debugger only"));
105 cl::alias DebugSymsa("a", cl::desc("Alias for --debug-syms"),
106 cl::aliasopt(DebugSyms));
108 cl::opt<bool> NumericSort("numeric-sort", cl::desc("Sort symbols by address"));
109 cl::alias NumericSortn("n", cl::desc("Alias for --numeric-sort"),
110 cl::aliasopt(NumericSort));
111 cl::alias NumericSortv("v", cl::desc("Alias for --numeric-sort"),
112 cl::aliasopt(NumericSort));
114 cl::opt<bool> NoSort("no-sort", cl::desc("Show symbols in order encountered"));
115 cl::alias NoSortp("p", cl::desc("Alias for --no-sort"), cl::aliasopt(NoSort));
117 cl::opt<bool> ReverseSort("reverse-sort", cl::desc("Sort in reverse order"));
118 cl::alias ReverseSortr("r", cl::desc("Alias for --reverse-sort"),
119 cl::aliasopt(ReverseSort));
121 cl::opt<bool> PrintSize("print-size",
122 cl::desc("Show symbol size instead of address"));
123 cl::alias PrintSizeS("S", cl::desc("Alias for --print-size"),
124 cl::aliasopt(PrintSize));
126 cl::opt<bool> SizeSort("size-sort", cl::desc("Sort symbols by size"));
128 cl::opt<bool> WithoutAliases("without-aliases", cl::Hidden,
129 cl::desc("Exclude aliases from output"));
131 cl::opt<bool> ArchiveMap("print-armap", cl::desc("Print the archive map"));
132 cl::alias ArchiveMaps("s", cl::desc("Alias for --print-armap"),
133 cl::aliasopt(ArchiveMap));
134 bool PrintAddress = true;
136 bool MultipleFiles = false;
138 bool HadError = false;
140 std::string ToolName;
143 static void error(Twine Message, Twine Path = Twine()) {
145 errs() << ToolName << ": " << Path << ": " << Message << ".\n";
148 static bool error(std::error_code EC, Twine Path = Twine()) {
150 error(EC.message(), Path);
166 static bool compareSymbolAddress(const NMSymbol &A, const NMSymbol &B) {
168 if (A.Address < B.Address)
170 else if (A.Address == B.Address && A.Name < B.Name)
172 else if (A.Address == B.Address && A.Name == B.Name && A.Size < B.Size)
177 if (A.Address > B.Address)
179 else if (A.Address == B.Address && A.Name > B.Name)
181 else if (A.Address == B.Address && A.Name == B.Name && A.Size > B.Size)
188 static bool compareSymbolSize(const NMSymbol &A, const NMSymbol &B) {
192 else if (A.Size == B.Size && A.Name < B.Name)
194 else if (A.Size == B.Size && A.Name == B.Name && A.Address < B.Address)
201 else if (A.Size == B.Size && A.Name > B.Name)
203 else if (A.Size == B.Size && A.Name == B.Name && A.Address > B.Address)
210 static bool compareSymbolName(const NMSymbol &A, const NMSymbol &B) {
214 else if (A.Name == B.Name && A.Size < B.Size)
216 else if (A.Name == B.Name && A.Size == B.Size && A.Address < B.Address)
223 else if (A.Name == B.Name && A.Size > B.Size)
225 else if (A.Name == B.Name && A.Size == B.Size && A.Address > B.Address)
232 static char isSymbolList64Bit(SymbolicFile *Obj) {
233 if (isa<IRObjectFile>(Obj))
235 else if (isa<COFFObjectFile>(Obj))
237 else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj))
238 return MachO->is64Bit();
239 else if (isa<ELF32LEObjectFile>(Obj))
241 else if (isa<ELF64LEObjectFile>(Obj))
243 else if (isa<ELF32BEObjectFile>(Obj))
245 else if (isa<ELF64BEObjectFile>(Obj))
251 static StringRef CurrentFilename;
252 typedef std::vector<NMSymbol> SymbolListT;
253 static SymbolListT SymbolList;
255 // darwinPrintSymbol() is used to print a symbol from a Mach-O file when the
256 // the OutputFormat is darwin. It produces the same output as darwin's nm(1) -m
258 static void darwinPrintSymbol(MachOObjectFile *MachO, SymbolListT::iterator I,
259 char *SymbolAddrStr, const char *printBlanks) {
260 MachO::mach_header H;
261 MachO::mach_header_64 H_64;
262 uint32_t Filetype, Flags;
263 MachO::nlist_64 STE_64;
268 if (MachO->is64Bit()) {
269 H_64 = MachO->MachOObjectFile::getHeader64();
270 Filetype = H_64.filetype;
272 STE_64 = MachO->getSymbol64TableEntry(I->Symb);
273 NType = STE_64.n_type;
274 NDesc = STE_64.n_desc;
275 NValue = STE_64.n_value;
277 H = MachO->MachOObjectFile::getHeader();
278 Filetype = H.filetype;
280 STE = MachO->getSymbolTableEntry(I->Symb);
283 NValue = STE.n_value;
287 if ((NType & MachO::N_TYPE) == MachO::N_INDR)
288 strcpy(SymbolAddrStr, printBlanks);
289 outs() << SymbolAddrStr << ' ';
292 switch (NType & MachO::N_TYPE) {
295 outs() << "(common) ";
296 if (MachO::GET_COMM_ALIGN(NDesc) != 0)
297 outs() << "(alignment 2^" << (int)MachO::GET_COMM_ALIGN(NDesc) << ") ";
299 if ((NType & MachO::N_TYPE) == MachO::N_PBUD)
300 outs() << "(prebound ";
303 if ((NDesc & MachO::REFERENCE_TYPE) ==
304 MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
305 outs() << "undefined [lazy bound]) ";
306 else if ((NDesc & MachO::REFERENCE_TYPE) ==
307 MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
308 outs() << "undefined [private lazy bound]) ";
309 else if ((NDesc & MachO::REFERENCE_TYPE) ==
310 MachO::REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY)
311 outs() << "undefined [private]) ";
313 outs() << "undefined) ";
317 outs() << "(absolute) ";
320 outs() << "(indirect) ";
322 case MachO::N_SECT: {
323 section_iterator Sec = MachO->section_end();
324 MachO->getSymbolSection(I->Symb, Sec);
325 DataRefImpl Ref = Sec->getRawDataRefImpl();
326 StringRef SectionName;
327 MachO->getSectionName(Ref, SectionName);
328 StringRef SegmentName = MachO->getSectionFinalSegmentName(Ref);
329 outs() << "(" << SegmentName << "," << SectionName << ") ";
337 if (NType & MachO::N_EXT) {
338 if (NDesc & MachO::REFERENCED_DYNAMICALLY)
339 outs() << "[referenced dynamically] ";
340 if (NType & MachO::N_PEXT) {
341 if ((NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF)
342 outs() << "weak private external ";
344 outs() << "private external ";
346 if ((NDesc & MachO::N_WEAK_REF) == MachO::N_WEAK_REF ||
347 (NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF) {
348 if ((NDesc & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF)) ==
349 (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
350 outs() << "weak external automatically hidden ";
352 outs() << "weak external ";
354 outs() << "external ";
357 if (NType & MachO::N_PEXT)
358 outs() << "non-external (was a private external) ";
360 outs() << "non-external ";
363 if (Filetype == MachO::MH_OBJECT &&
364 (NDesc & MachO::N_NO_DEAD_STRIP) == MachO::N_NO_DEAD_STRIP)
365 outs() << "[no dead strip] ";
367 if (Filetype == MachO::MH_OBJECT &&
368 ((NType & MachO::N_TYPE) != MachO::N_UNDF) &&
369 (NDesc & MachO::N_SYMBOL_RESOLVER) == MachO::N_SYMBOL_RESOLVER)
370 outs() << "[symbol resolver] ";
372 if (Filetype == MachO::MH_OBJECT &&
373 ((NType & MachO::N_TYPE) != MachO::N_UNDF) &&
374 (NDesc & MachO::N_ALT_ENTRY) == MachO::N_ALT_ENTRY)
375 outs() << "[alt entry] ";
377 if ((NDesc & MachO::N_ARM_THUMB_DEF) == MachO::N_ARM_THUMB_DEF)
378 outs() << "[Thumb] ";
380 if ((NType & MachO::N_TYPE) == MachO::N_INDR) {
381 outs() << I->Name << " (for ";
382 StringRef IndirectName;
383 if (MachO->getIndirectName(I->Symb, IndirectName))
386 outs() << IndirectName << ")";
390 if ((Flags & MachO::MH_TWOLEVEL) == MachO::MH_TWOLEVEL &&
391 (((NType & MachO::N_TYPE) == MachO::N_UNDF && NValue == 0) ||
392 (NType & MachO::N_TYPE) == MachO::N_PBUD)) {
393 uint32_t LibraryOrdinal = MachO::GET_LIBRARY_ORDINAL(NDesc);
394 if (LibraryOrdinal != 0) {
395 if (LibraryOrdinal == MachO::EXECUTABLE_ORDINAL)
396 outs() << " (from executable)";
397 else if (LibraryOrdinal == MachO::DYNAMIC_LOOKUP_ORDINAL)
398 outs() << " (dynamically looked up)";
400 StringRef LibraryName;
401 if (MachO->getLibraryShortNameByIndex(LibraryOrdinal - 1, LibraryName))
402 outs() << " (from bad library ordinal " << LibraryOrdinal << ")";
404 outs() << " (from " << LibraryName << ")";
412 static void sortAndPrintSymbolList(SymbolicFile *Obj, bool printName) {
415 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolAddress);
417 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolSize);
419 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolName);
422 if (OutputFormat == posix && MultipleFiles && printName) {
423 outs() << '\n' << CurrentFilename << ":\n";
424 } else if (OutputFormat == bsd && MultipleFiles && printName) {
425 outs() << "\n" << CurrentFilename << ":\n";
426 } else if (OutputFormat == sysv) {
427 outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n"
428 << "Name Value Class Type"
429 << " Size Line Section\n";
432 const char *printBlanks, *printFormat;
433 if (isSymbolList64Bit(Obj)) {
435 printFormat = "%016" PRIx64;
438 printFormat = "%08" PRIx64;
441 for (SymbolListT::iterator I = SymbolList.begin(), E = SymbolList.end();
443 if ((I->TypeChar != 'U') && UndefinedOnly)
445 if ((I->TypeChar == 'U') && DefinedOnly)
447 if (SizeSort && !PrintAddress && I->Size == UnknownAddressOrSize)
450 char SymbolAddrStr[18] = "";
451 char SymbolSizeStr[18] = "";
453 if (OutputFormat == sysv || I->Address == UnknownAddressOrSize)
454 strcpy(SymbolAddrStr, printBlanks);
455 if (OutputFormat == sysv)
456 strcpy(SymbolSizeStr, printBlanks);
458 if (I->Address != UnknownAddressOrSize)
459 format(printFormat, I->Address)
460 .print(SymbolAddrStr, sizeof(SymbolAddrStr));
461 if (I->Size != UnknownAddressOrSize)
462 format(printFormat, I->Size).print(SymbolSizeStr, sizeof(SymbolSizeStr));
464 // If OutputFormat is darwin and we have a MachOObjectFile print as darwin's
465 // nm(1) -m output, else if OutputFormat is darwin and not a Mach-O object
466 // fall back to OutputFormat bsd (see below).
467 MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj);
468 if (OutputFormat == darwin && MachO) {
469 darwinPrintSymbol(MachO, I, SymbolAddrStr, printBlanks);
470 } else if (OutputFormat == posix) {
471 outs() << I->Name << " " << I->TypeChar << " " << SymbolAddrStr
472 << SymbolSizeStr << "\n";
473 } else if (OutputFormat == bsd || (OutputFormat == darwin && !MachO)) {
475 outs() << SymbolAddrStr << ' ';
477 outs() << SymbolSizeStr;
478 if (I->Size != UnknownAddressOrSize)
481 outs() << I->TypeChar << " " << I->Name << "\n";
482 } else if (OutputFormat == sysv) {
483 std::string PaddedName(I->Name);
484 while (PaddedName.length() < 20)
486 outs() << PaddedName << "|" << SymbolAddrStr << "| " << I->TypeChar
487 << " | |" << SymbolSizeStr << "| |\n";
494 template <class ELFT>
495 static char getSymbolNMTypeChar(ELFObjectFile<ELFT> &Obj,
496 basic_symbol_iterator I) {
497 typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
498 typedef typename ELFObjectFile<ELFT>::Elf_Shdr Elf_Shdr;
501 symbol_iterator SymI(I);
503 DataRefImpl Symb = I->getRawDataRefImpl();
504 const Elf_Sym *ESym = Obj.getSymbol(Symb);
505 const ELFFile<ELFT> &EF = *Obj.getELFFile();
506 const Elf_Shdr *ESec = EF.getSection(ESym);
509 switch (ESec->sh_type) {
510 case ELF::SHT_PROGBITS:
511 case ELF::SHT_DYNAMIC:
512 switch (ESec->sh_flags) {
513 case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
515 case (ELF::SHF_TLS | ELF::SHF_ALLOC | ELF::SHF_WRITE):
516 case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
519 case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
520 case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
524 case ELF::SHT_NOBITS:
529 if (ESym->getType() == ELF::STT_SECTION) {
531 if (error(SymI->getName(Name)))
533 return StringSwitch<char>(Name)
534 .StartsWith(".debug", 'N')
535 .StartsWith(".note", 'n')
542 static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
543 const coff_symbol *Symb = Obj.getCOFFSymbol(*I);
545 symbol_iterator SymI(I);
548 if (error(SymI->getName(Name)))
551 char Ret = StringSwitch<char>(Name)
552 .StartsWith(".debug", 'N')
553 .StartsWith(".sxdata", 'N')
559 uint32_t Characteristics = 0;
560 if (!COFF::isReservedSectionNumber(Symb->SectionNumber)) {
561 section_iterator SecI = Obj.section_end();
562 if (error(SymI->getSection(SecI)))
564 const coff_section *Section = Obj.getCOFFSection(*SecI);
565 Characteristics = Section->Characteristics;
568 switch (Symb->SectionNumber) {
569 case COFF::IMAGE_SYM_DEBUG:
572 // Check section type.
573 if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
575 else if (Characteristics & COFF::IMAGE_SCN_MEM_READ &&
576 ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
578 else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
580 else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
582 else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
585 // Check for section symbol.
586 else if (Symb->isSectionDefinition())
593 static uint8_t getNType(MachOObjectFile &Obj, DataRefImpl Symb) {
595 MachO::nlist_64 STE = Obj.getSymbol64TableEntry(Symb);
598 MachO::nlist STE = Obj.getSymbolTableEntry(Symb);
602 static char getSymbolNMTypeChar(MachOObjectFile &Obj, basic_symbol_iterator I) {
603 DataRefImpl Symb = I->getRawDataRefImpl();
604 uint8_t NType = getNType(Obj, Symb);
606 switch (NType & MachO::N_TYPE) {
611 case MachO::N_SECT: {
612 section_iterator Sec = Obj.section_end();
613 Obj.getSymbolSection(Symb, Sec);
614 DataRefImpl Ref = Sec->getRawDataRefImpl();
615 StringRef SectionName;
616 Obj.getSectionName(Ref, SectionName);
617 StringRef SegmentName = Obj.getSectionFinalSegmentName(Ref);
618 if (SegmentName == "__TEXT" && SectionName == "__text")
620 else if (SegmentName == "__DATA" && SectionName == "__data")
622 else if (SegmentName == "__DATA" && SectionName == "__bss")
632 static char getSymbolNMTypeChar(const GlobalValue &GV) {
633 if (GV.getType()->getElementType()->isFunctionTy())
635 // FIXME: should we print 'b'? At the IR level we cannot be sure if this
636 // will be in bss or not, but we could approximate.
640 static char getSymbolNMTypeChar(IRObjectFile &Obj, basic_symbol_iterator I) {
641 const GlobalValue *GV = Obj.getSymbolGV(I->getRawDataRefImpl());
644 return getSymbolNMTypeChar(*GV);
647 template <class ELFT>
648 static bool isObject(ELFObjectFile<ELFT> &Obj, symbol_iterator I) {
649 typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
651 DataRefImpl Symb = I->getRawDataRefImpl();
652 const Elf_Sym *ESym = Obj.getSymbol(Symb);
654 return ESym->getType() == ELF::STT_OBJECT;
657 static bool isObject(SymbolicFile *Obj, basic_symbol_iterator I) {
658 if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
659 return isObject(*ELF, I);
660 if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
661 return isObject(*ELF, I);
662 if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
663 return isObject(*ELF, I);
664 if (ELF64BEObjectFile *ELF = dyn_cast<ELF64BEObjectFile>(Obj))
665 return isObject(*ELF, I);
669 static char getNMTypeChar(SymbolicFile *Obj, basic_symbol_iterator I) {
670 uint32_t Symflags = I->getFlags();
671 if ((Symflags & object::SymbolRef::SF_Weak) && !isa<MachOObjectFile>(Obj)) {
672 char Ret = isObject(Obj, I) ? 'v' : 'w';
673 if (!(Symflags & object::SymbolRef::SF_Undefined))
678 if (Symflags & object::SymbolRef::SF_Undefined)
681 if (Symflags & object::SymbolRef::SF_Common)
685 if (Symflags & object::SymbolRef::SF_Absolute)
687 else if (IRObjectFile *IR = dyn_cast<IRObjectFile>(Obj))
688 Ret = getSymbolNMTypeChar(*IR, I);
689 else if (COFFObjectFile *COFF = dyn_cast<COFFObjectFile>(Obj))
690 Ret = getSymbolNMTypeChar(*COFF, I);
691 else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj))
692 Ret = getSymbolNMTypeChar(*MachO, I);
693 else if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
694 Ret = getSymbolNMTypeChar(*ELF, I);
695 else if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
696 Ret = getSymbolNMTypeChar(*ELF, I);
697 else if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
698 Ret = getSymbolNMTypeChar(*ELF, I);
700 Ret = getSymbolNMTypeChar(*cast<ELF64BEObjectFile>(Obj), I);
702 if (Symflags & object::SymbolRef::SF_Global)
708 static void dumpSymbolNamesFromObject(SymbolicFile *Obj, bool printName) {
709 basic_symbol_iterator IBegin = Obj->symbol_begin();
710 basic_symbol_iterator IEnd = Obj->symbol_end();
713 error("File format has no dynamic symbol table", Obj->getFileName());
716 std::pair<symbol_iterator, symbol_iterator> IDyn =
717 getELFDynamicSymbolIterators(Obj);
721 std::string NameBuffer;
722 raw_string_ostream OS(NameBuffer);
723 for (basic_symbol_iterator I = IBegin; I != IEnd; ++I) {
724 uint32_t SymFlags = I->getFlags();
725 if (!DebugSyms && (SymFlags & SymbolRef::SF_FormatSpecific))
727 if (WithoutAliases) {
728 if (IRObjectFile *IR = dyn_cast<IRObjectFile>(Obj)) {
729 const GlobalValue *GV = IR->getSymbolGV(I->getRawDataRefImpl());
730 if (GV && isa<GlobalAlias>(GV))
735 S.Size = UnknownAddressOrSize;
736 S.Address = UnknownAddressOrSize;
737 if ((PrintSize || SizeSort) && isa<ObjectFile>(Obj)) {
738 symbol_iterator SymI = I;
739 if (error(SymI->getSize(S.Size)))
742 if (PrintAddress && isa<ObjectFile>(Obj))
743 if (error(symbol_iterator(I)->getAddress(S.Address)))
745 S.TypeChar = getNMTypeChar(Obj, I);
746 if (error(I->printName(OS)))
749 S.Symb = I->getRawDataRefImpl();
750 SymbolList.push_back(S);
754 const char *P = NameBuffer.c_str();
755 for (unsigned I = 0; I < SymbolList.size(); ++I) {
756 SymbolList[I].Name = P;
760 CurrentFilename = Obj->getFileName();
761 sortAndPrintSymbolList(Obj, printName);
764 // checkMachOAndArchFlags() checks to see if the SymbolicFile is a Mach-O file
765 // and if it is and there is a list of architecture flags is specified then
766 // check to make sure this Mach-O file is one of those architectures or all
767 // architectures was specificed. If not then an error is generated and this
768 // routine returns false. Else it returns true.
769 static bool checkMachOAndArchFlags(SymbolicFile *O, std::string &Filename) {
770 if (isa<MachOObjectFile>(O) && !ArchAll && ArchFlags.size() != 0) {
771 MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(O);
772 bool ArchFound = false;
773 MachO::mach_header H;
774 MachO::mach_header_64 H_64;
776 if (MachO->is64Bit()) {
777 H_64 = MachO->MachOObjectFile::getHeader64();
778 T = MachOObjectFile::getArch(H_64.cputype, H_64.cpusubtype);
780 H = MachO->MachOObjectFile::getHeader();
781 T = MachOObjectFile::getArch(H.cputype, H.cpusubtype);
784 for (i = 0; i < ArchFlags.size(); ++i) {
785 if (ArchFlags[i] == T.getArchName())
791 "file: " + Filename + " does not contain architecture");
798 static void dumpSymbolNamesFromFile(std::string &Filename) {
799 std::unique_ptr<MemoryBuffer> Buffer;
800 if (error(MemoryBuffer::getFileOrSTDIN(Filename, Buffer), Filename))
803 LLVMContext &Context = getGlobalContext();
804 ErrorOr<Binary *> BinaryOrErr = createBinary(Buffer, &Context);
805 if (error(BinaryOrErr.getError(), Filename))
808 std::unique_ptr<Binary> Bin(BinaryOrErr.get());
810 if (Archive *A = dyn_cast<Archive>(Bin.get())) {
812 Archive::symbol_iterator I = A->symbol_begin();
813 Archive::symbol_iterator E = A->symbol_end();
815 outs() << "Archive map\n";
816 for (; I != E; ++I) {
817 ErrorOr<Archive::child_iterator> C = I->getMember();
818 if (error(C.getError()))
820 ErrorOr<StringRef> FileNameOrErr = C.get()->getName();
821 if (error(FileNameOrErr.getError()))
823 StringRef SymName = I->getName();
824 outs() << SymName << " in " << FileNameOrErr.get() << "\n";
830 for (Archive::child_iterator I = A->child_begin(), E = A->child_end();
832 ErrorOr<std::unique_ptr<Binary>> ChildOrErr = I->getAsBinary(&Context);
833 if (ChildOrErr.getError())
835 if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
836 if (!checkMachOAndArchFlags(O, Filename))
839 if (isa<MachOObjectFile>(O)) {
840 outs() << Filename << "(" << O->getFileName() << ")";
842 outs() << O->getFileName();
844 dumpSymbolNamesFromObject(O, false);
849 if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(Bin.get())) {
850 // If we have a list of architecture flags specified dump only those.
851 if (!ArchAll && ArchFlags.size() != 0) {
852 // Look for a slice in the universal binary that matches each ArchFlag.
854 for (unsigned i = 0; i < ArchFlags.size(); ++i) {
856 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
857 E = UB->end_objects();
859 if (ArchFlags[i] == I->getArchTypeName()) {
861 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
862 I->getAsObjectFile();
863 std::unique_ptr<Archive> A;
865 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
866 if (ArchFlags.size() > 1) {
867 outs() << "\n" << Obj->getFileName() << " (for architecture "
868 << I->getArchTypeName() << ")"
871 dumpSymbolNamesFromObject(Obj.get(), false);
872 } else if (!I->getAsArchive(A)) {
873 for (Archive::child_iterator AI = A->child_begin(),
876 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
877 AI->getAsBinary(&Context);
878 if (ChildOrErr.getError())
880 if (SymbolicFile *O =
881 dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
882 outs() << "\n" << A->getFileName();
883 outs() << "(" << O->getFileName() << ")";
884 if (ArchFlags.size() > 1) {
885 outs() << " (for architecture " << I->getArchTypeName()
889 dumpSymbolNamesFromObject(O, false);
897 "file: " + Filename + " does not contain architecture");
903 // No architecture flags were specified so if this contains a slice that
904 // matches the host architecture dump only that.
906 StringRef HostArchName = MachOObjectFile::getHostArch().getArchName();
907 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
908 E = UB->end_objects();
910 if (HostArchName == I->getArchTypeName()) {
911 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
912 std::unique_ptr<Archive> A;
914 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
915 dumpSymbolNamesFromObject(Obj.get(), false);
916 } else if (!I->getAsArchive(A)) {
917 for (Archive::child_iterator AI = A->child_begin(),
920 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
921 AI->getAsBinary(&Context);
922 if (ChildOrErr.getError())
924 if (SymbolicFile *O =
925 dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
926 outs() << "\n" << A->getFileName() << "(" << O->getFileName()
929 dumpSymbolNamesFromObject(O, false);
937 // Either all architectures have been specified or none have been specified
938 // and this does not contain the host architecture so dump all the slices.
939 bool moreThanOneArch = UB->getNumberOfObjects() > 1;
940 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
941 E = UB->end_objects();
943 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
944 std::unique_ptr<Archive> A;
946 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
949 outs() << Obj->getFileName();
950 if (isa<MachOObjectFile>(Obj.get()) && moreThanOneArch)
951 outs() << " (for architecture " << I->getArchTypeName() << ")";
953 dumpSymbolNamesFromObject(Obj.get(), false);
954 } else if (!I->getAsArchive(A)) {
955 for (Archive::child_iterator AI = A->child_begin(), AE = A->child_end();
957 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
958 AI->getAsBinary(&Context);
959 if (ChildOrErr.getError())
961 if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
962 outs() << "\n" << A->getFileName();
963 if (isa<MachOObjectFile>(O)) {
964 outs() << "(" << O->getFileName() << ")";
966 outs() << " (for architecture " << I->getArchTypeName() << ")";
968 outs() << ":" << O->getFileName();
970 dumpSymbolNamesFromObject(O, false);
977 if (SymbolicFile *O = dyn_cast<SymbolicFile>(Bin.get())) {
978 if (!checkMachOAndArchFlags(O, Filename))
980 dumpSymbolNamesFromObject(O, true);
983 error("unrecognizable file type", Filename);
987 int main(int argc, char **argv) {
988 // Print a stack trace if we signal out.
989 sys::PrintStackTraceOnErrorSignal();
990 PrettyStackTraceProgram X(argc, argv);
992 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
993 cl::ParseCommandLineOptions(argc, argv, "llvm symbol table dumper\n");
995 // llvm-nm only reads binary files.
996 if (error(sys::ChangeStdinToBinary()))
999 llvm::InitializeAllTargetInfos();
1000 llvm::InitializeAllTargetMCs();
1001 llvm::InitializeAllAsmParsers();
1007 OutputFormat = posix;
1009 OutputFormat = darwin;
1011 // The relative order of these is important. If you pass --size-sort it should
1012 // only print out the size. However, if you pass -S --size-sort, it should
1013 // print out both the size and address.
1014 if (SizeSort && !PrintSize)
1015 PrintAddress = false;
1016 if (OutputFormat == sysv || SizeSort)
1019 switch (InputFilenames.size()) {
1021 InputFilenames.push_back("a.out");
1025 MultipleFiles = true;
1028 for (unsigned i = 0; i < ArchFlags.size(); ++i) {
1029 if (ArchFlags[i] == "all") {
1032 Triple T = MachOObjectFile::getArch(ArchFlags[i]);
1033 if (T.getArch() == Triple::UnknownArch)
1034 error("Unknown architecture named '" + ArchFlags[i] + "'",
1035 "for the -arch option");
1039 std::for_each(InputFilenames.begin(), InputFilenames.end(),
1040 dumpSymbolNamesFromFile);