1 //===-- llvm-nm.cpp - Symbol table dumping utility for llvm ---------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
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.
13 //
14 // This "nm" supports many of the features of GNU "nm", including its different
15 // output formats.
16 //
17 //===----------------------------------------------------------------------===//
18
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/TargetSelect.h"
40 #include "llvm/Support/raw_ostream.h"
41 #include <algorithm>
42 #include <cctype>
43 #include <cerrno>
44 #include <cstring>
45 #include <system_error>
46 #include <vector>
47 using namespace llvm;
48 using namespace object;
49
50 namespace {
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),
57 cl::init(bsd));
58 cl::alias OutputFormat2("f", cl::desc("Alias for --format"),
59 cl::aliasopt(OutputFormat));
60
61 cl::list<std::string> InputFilenames(cl::Positional, cl::desc("<input files>"),
62 cl::ZeroOrMore);
63
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));
68
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));
74
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));
79
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));
84
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"));
88
89 static cl::list<std::string>
90 ArchFlags("arch", cl::desc("architecture(s) from a Mach-O file to dump"),
91 cl::ZeroOrMore);
92 bool ArchAll = false;
93
94 cl::opt<bool> PrintFileName(
95 "print-file-name",
96 cl::desc("Precede each symbol with the object file it came from"));
97
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));
102
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));
107
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));
113
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));
116
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));
120
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));
125
126 cl::opt<bool> SizeSort("size-sort", cl::desc("Sort symbols by size"));
127
128 cl::opt<bool> WithoutAliases("without-aliases", cl::Hidden,
129 cl::desc("Exclude aliases from output"));
130
131 cl::opt<bool> ArchiveMap("print-armap", cl::desc("Print the archive map"));
132 cl::alias ArchiveMaps("M", cl::desc("Alias for --print-armap"),
133 cl::aliasopt(ArchiveMap));
134
135 cl::opt<bool> JustSymbolName("just-symbol-name",
136 cl::desc("Print just the symbol's name"));
137 cl::alias JustSymbolNames("j", cl::desc("Alias for --just-symbol-name"),
138 cl::aliasopt(JustSymbolName));
139
140 // FIXME: This option takes exactly two strings and should be allowed anywhere
141 // on the command line. Such that "llvm-nm -s __TEXT __text foo.o" would work.
142 // But that does not as the CommandLine Library does not have a way to make
143 // this work. For now the "-s __TEXT __text" has to be last on the command
144 // line.
145 cl::list<std::string> SegSect("s", cl::Positional, cl::ZeroOrMore,
146 cl::desc("Dump only symbols from this segment "
147 "and section name, Mach-O only"));
148
149 cl::opt<bool> FormatMachOasHex("x", cl::desc("Print symbol entry in hex, "
150 "Mach-O only"));
151
152 cl::opt<bool> NoLLVMBitcode("no-llvm-bc",
153 cl::desc("Disable LLVM bitcode reader"));
154
155 bool PrintAddress = true;
156
157 bool MultipleFiles = false;
158
159 bool HadError = false;
160
161 std::string ToolName;
162 }
163
error(Twine Message,Twine Path=Twine ())164 static void error(Twine Message, Twine Path = Twine()) {
165 HadError = true;
166 errs() << ToolName << ": " << Path << ": " << Message << ".\n";
167 }
168
error(std::error_code EC,Twine Path=Twine ())169 static bool error(std::error_code EC, Twine Path = Twine()) {
170 if (EC) {
171 error(EC.message(), Path);
172 return true;
173 }
174 return false;
175 }
176
177 namespace {
178 struct NMSymbol {
179 uint64_t Address;
180 uint64_t Size;
181 char TypeChar;
182 StringRef Name;
183 DataRefImpl Symb;
184 };
185 }
186
compareSymbolAddress(const NMSymbol & A,const NMSymbol & B)187 static bool compareSymbolAddress(const NMSymbol &A, const NMSymbol &B) {
188 if (!ReverseSort) {
189 if (A.Address < B.Address)
190 return true;
191 else if (A.Address == B.Address && A.Name < B.Name)
192 return true;
193 else if (A.Address == B.Address && A.Name == B.Name && A.Size < B.Size)
194 return true;
195 else
196 return false;
197 } else {
198 if (A.Address > B.Address)
199 return true;
200 else if (A.Address == B.Address && A.Name > B.Name)
201 return true;
202 else if (A.Address == B.Address && A.Name == B.Name && A.Size > B.Size)
203 return true;
204 else
205 return false;
206 }
207 }
208
compareSymbolSize(const NMSymbol & A,const NMSymbol & B)209 static bool compareSymbolSize(const NMSymbol &A, const NMSymbol &B) {
210 if (!ReverseSort) {
211 if (A.Size < B.Size)
212 return true;
213 else if (A.Size == B.Size && A.Name < B.Name)
214 return true;
215 else if (A.Size == B.Size && A.Name == B.Name && A.Address < B.Address)
216 return true;
217 else
218 return false;
219 } else {
220 if (A.Size > B.Size)
221 return true;
222 else if (A.Size == B.Size && A.Name > B.Name)
223 return true;
224 else if (A.Size == B.Size && A.Name == B.Name && A.Address > B.Address)
225 return true;
226 else
227 return false;
228 }
229 }
230
compareSymbolName(const NMSymbol & A,const NMSymbol & B)231 static bool compareSymbolName(const NMSymbol &A, const NMSymbol &B) {
232 if (!ReverseSort) {
233 if (A.Name < B.Name)
234 return true;
235 else if (A.Name == B.Name && A.Size < B.Size)
236 return true;
237 else if (A.Name == B.Name && A.Size == B.Size && A.Address < B.Address)
238 return true;
239 else
240 return false;
241 } else {
242 if (A.Name > B.Name)
243 return true;
244 else if (A.Name == B.Name && A.Size > B.Size)
245 return true;
246 else if (A.Name == B.Name && A.Size == B.Size && A.Address > B.Address)
247 return true;
248 else
249 return false;
250 }
251 }
252
isSymbolList64Bit(SymbolicFile & Obj)253 static char isSymbolList64Bit(SymbolicFile &Obj) {
254 if (isa<IRObjectFile>(Obj))
255 return false;
256 else if (isa<COFFObjectFile>(Obj))
257 return false;
258 else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj))
259 return MachO->is64Bit();
260 else if (isa<ELF32LEObjectFile>(Obj))
261 return false;
262 else if (isa<ELF64LEObjectFile>(Obj))
263 return true;
264 else if (isa<ELF32BEObjectFile>(Obj))
265 return false;
266 else if (isa<ELF64BEObjectFile>(Obj))
267 return true;
268 else
269 return false;
270 }
271
272 static StringRef CurrentFilename;
273 typedef std::vector<NMSymbol> SymbolListT;
274 static SymbolListT SymbolList;
275
276 // darwinPrintSymbol() is used to print a symbol from a Mach-O file when the
277 // the OutputFormat is darwin or we are printing Mach-O symbols in hex. For
278 // the darwin format it produces the same output as darwin's nm(1) -m output
279 // and when printing Mach-O symbols in hex it produces the same output as
280 // darwin's nm(1) -x format.
darwinPrintSymbol(MachOObjectFile * MachO,SymbolListT::iterator I,char * SymbolAddrStr,const char * printBlanks)281 static void darwinPrintSymbol(MachOObjectFile *MachO, SymbolListT::iterator I,
282 char *SymbolAddrStr, const char *printBlanks) {
283 MachO::mach_header H;
284 MachO::mach_header_64 H_64;
285 uint32_t Filetype, Flags;
286 MachO::nlist_64 STE_64;
287 MachO::nlist STE;
288 uint8_t NType;
289 uint8_t NSect;
290 uint16_t NDesc;
291 uint32_t NStrx;
292 uint64_t NValue;
293 if (MachO->is64Bit()) {
294 H_64 = MachO->MachOObjectFile::getHeader64();
295 Filetype = H_64.filetype;
296 Flags = H_64.flags;
297 STE_64 = MachO->getSymbol64TableEntry(I->Symb);
298 NType = STE_64.n_type;
299 NSect = STE_64.n_sect;
300 NDesc = STE_64.n_desc;
301 NStrx = STE_64.n_strx;
302 NValue = STE_64.n_value;
303 } else {
304 H = MachO->MachOObjectFile::getHeader();
305 Filetype = H.filetype;
306 Flags = H.flags;
307 STE = MachO->getSymbolTableEntry(I->Symb);
308 NType = STE.n_type;
309 NSect = STE.n_sect;
310 NDesc = STE.n_desc;
311 NStrx = STE.n_strx;
312 NValue = STE.n_value;
313 }
314
315 // If we are printing Mach-O symbols in hex do that and return.
316 if (FormatMachOasHex) {
317 char Str[18] = "";
318 const char *printFormat;
319 if (MachO->is64Bit())
320 printFormat = "%016" PRIx64;
321 else
322 printFormat = "%08" PRIx64;
323 format(printFormat, NValue).print(Str, sizeof(Str));
324 outs() << Str << ' ';
325 format("%02x", NType).print(Str, sizeof(Str));
326 outs() << Str << ' ';
327 format("%02x", NSect).print(Str, sizeof(Str));
328 outs() << Str << ' ';
329 format("%04x", NDesc).print(Str, sizeof(Str));
330 outs() << Str << ' ';
331 format("%08x", NStrx).print(Str, sizeof(Str));
332 outs() << Str << ' ';
333 outs() << I->Name << "\n";
334 return;
335 }
336
337 if (PrintAddress) {
338 if ((NType & MachO::N_TYPE) == MachO::N_INDR)
339 strcpy(SymbolAddrStr, printBlanks);
340 outs() << SymbolAddrStr << ' ';
341 }
342
343 switch (NType & MachO::N_TYPE) {
344 case MachO::N_UNDF:
345 if (NValue != 0) {
346 outs() << "(common) ";
347 if (MachO::GET_COMM_ALIGN(NDesc) != 0)
348 outs() << "(alignment 2^" << (int)MachO::GET_COMM_ALIGN(NDesc) << ") ";
349 } else {
350 if ((NType & MachO::N_TYPE) == MachO::N_PBUD)
351 outs() << "(prebound ";
352 else
353 outs() << "(";
354 if ((NDesc & MachO::REFERENCE_TYPE) ==
355 MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
356 outs() << "undefined [lazy bound]) ";
357 else if ((NDesc & MachO::REFERENCE_TYPE) ==
358 MachO::REFERENCE_FLAG_UNDEFINED_LAZY)
359 outs() << "undefined [private lazy bound]) ";
360 else if ((NDesc & MachO::REFERENCE_TYPE) ==
361 MachO::REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY)
362 outs() << "undefined [private]) ";
363 else
364 outs() << "undefined) ";
365 }
366 break;
367 case MachO::N_ABS:
368 outs() << "(absolute) ";
369 break;
370 case MachO::N_INDR:
371 outs() << "(indirect) ";
372 break;
373 case MachO::N_SECT: {
374 section_iterator Sec = MachO->section_end();
375 MachO->getSymbolSection(I->Symb, Sec);
376 DataRefImpl Ref = Sec->getRawDataRefImpl();
377 StringRef SectionName;
378 MachO->getSectionName(Ref, SectionName);
379 StringRef SegmentName = MachO->getSectionFinalSegmentName(Ref);
380 outs() << "(" << SegmentName << "," << SectionName << ") ";
381 break;
382 }
383 default:
384 outs() << "(?) ";
385 break;
386 }
387
388 if (NType & MachO::N_EXT) {
389 if (NDesc & MachO::REFERENCED_DYNAMICALLY)
390 outs() << "[referenced dynamically] ";
391 if (NType & MachO::N_PEXT) {
392 if ((NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF)
393 outs() << "weak private external ";
394 else
395 outs() << "private external ";
396 } else {
397 if ((NDesc & MachO::N_WEAK_REF) == MachO::N_WEAK_REF ||
398 (NDesc & MachO::N_WEAK_DEF) == MachO::N_WEAK_DEF) {
399 if ((NDesc & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF)) ==
400 (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
401 outs() << "weak external automatically hidden ";
402 else
403 outs() << "weak external ";
404 } else
405 outs() << "external ";
406 }
407 } else {
408 if (NType & MachO::N_PEXT)
409 outs() << "non-external (was a private external) ";
410 else
411 outs() << "non-external ";
412 }
413
414 if (Filetype == MachO::MH_OBJECT &&
415 (NDesc & MachO::N_NO_DEAD_STRIP) == MachO::N_NO_DEAD_STRIP)
416 outs() << "[no dead strip] ";
417
418 if (Filetype == MachO::MH_OBJECT &&
419 ((NType & MachO::N_TYPE) != MachO::N_UNDF) &&
420 (NDesc & MachO::N_SYMBOL_RESOLVER) == MachO::N_SYMBOL_RESOLVER)
421 outs() << "[symbol resolver] ";
422
423 if (Filetype == MachO::MH_OBJECT &&
424 ((NType & MachO::N_TYPE) != MachO::N_UNDF) &&
425 (NDesc & MachO::N_ALT_ENTRY) == MachO::N_ALT_ENTRY)
426 outs() << "[alt entry] ";
427
428 if ((NDesc & MachO::N_ARM_THUMB_DEF) == MachO::N_ARM_THUMB_DEF)
429 outs() << "[Thumb] ";
430
431 if ((NType & MachO::N_TYPE) == MachO::N_INDR) {
432 outs() << I->Name << " (for ";
433 StringRef IndirectName;
434 if (MachO->getIndirectName(I->Symb, IndirectName))
435 outs() << "?)";
436 else
437 outs() << IndirectName << ")";
438 } else
439 outs() << I->Name;
440
441 if ((Flags & MachO::MH_TWOLEVEL) == MachO::MH_TWOLEVEL &&
442 (((NType & MachO::N_TYPE) == MachO::N_UNDF && NValue == 0) ||
443 (NType & MachO::N_TYPE) == MachO::N_PBUD)) {
444 uint32_t LibraryOrdinal = MachO::GET_LIBRARY_ORDINAL(NDesc);
445 if (LibraryOrdinal != 0) {
446 if (LibraryOrdinal == MachO::EXECUTABLE_ORDINAL)
447 outs() << " (from executable)";
448 else if (LibraryOrdinal == MachO::DYNAMIC_LOOKUP_ORDINAL)
449 outs() << " (dynamically looked up)";
450 else {
451 StringRef LibraryName;
452 if (MachO->getLibraryShortNameByIndex(LibraryOrdinal - 1, LibraryName))
453 outs() << " (from bad library ordinal " << LibraryOrdinal << ")";
454 else
455 outs() << " (from " << LibraryName << ")";
456 }
457 }
458 }
459
460 outs() << "\n";
461 }
462
463 // Table that maps Darwin's Mach-O stab constants to strings to allow printing.
464 struct DarwinStabName {
465 uint8_t NType;
466 const char *Name;
467 };
468 static const struct DarwinStabName DarwinStabNames[] = {
469 {MachO::N_GSYM, "GSYM"},
470 {MachO::N_FNAME, "FNAME"},
471 {MachO::N_FUN, "FUN"},
472 {MachO::N_STSYM, "STSYM"},
473 {MachO::N_LCSYM, "LCSYM"},
474 {MachO::N_BNSYM, "BNSYM"},
475 {MachO::N_PC, "PC"},
476 {MachO::N_AST, "AST"},
477 {MachO::N_OPT, "OPT"},
478 {MachO::N_RSYM, "RSYM"},
479 {MachO::N_SLINE, "SLINE"},
480 {MachO::N_ENSYM, "ENSYM"},
481 {MachO::N_SSYM, "SSYM"},
482 {MachO::N_SO, "SO"},
483 {MachO::N_OSO, "OSO"},
484 {MachO::N_LSYM, "LSYM"},
485 {MachO::N_BINCL, "BINCL"},
486 {MachO::N_SOL, "SOL"},
487 {MachO::N_PARAMS, "PARAM"},
488 {MachO::N_VERSION, "VERS"},
489 {MachO::N_OLEVEL, "OLEV"},
490 {MachO::N_PSYM, "PSYM"},
491 {MachO::N_EINCL, "EINCL"},
492 {MachO::N_ENTRY, "ENTRY"},
493 {MachO::N_LBRAC, "LBRAC"},
494 {MachO::N_EXCL, "EXCL"},
495 {MachO::N_RBRAC, "RBRAC"},
496 {MachO::N_BCOMM, "BCOMM"},
497 {MachO::N_ECOMM, "ECOMM"},
498 {MachO::N_ECOML, "ECOML"},
499 {MachO::N_LENG, "LENG"},
500 {0, 0}};
getDarwinStabString(uint8_t NType)501 static const char *getDarwinStabString(uint8_t NType) {
502 for (unsigned i = 0; DarwinStabNames[i].Name; i++) {
503 if (DarwinStabNames[i].NType == NType)
504 return DarwinStabNames[i].Name;
505 }
506 return 0;
507 }
508
509 // darwinPrintStab() prints the n_sect, n_desc along with a symbolic name of
510 // a stab n_type value in a Mach-O file.
darwinPrintStab(MachOObjectFile * MachO,SymbolListT::iterator I)511 static void darwinPrintStab(MachOObjectFile *MachO, SymbolListT::iterator I) {
512 MachO::nlist_64 STE_64;
513 MachO::nlist STE;
514 uint8_t NType;
515 uint8_t NSect;
516 uint16_t NDesc;
517 if (MachO->is64Bit()) {
518 STE_64 = MachO->getSymbol64TableEntry(I->Symb);
519 NType = STE_64.n_type;
520 NSect = STE_64.n_sect;
521 NDesc = STE_64.n_desc;
522 } else {
523 STE = MachO->getSymbolTableEntry(I->Symb);
524 NType = STE.n_type;
525 NSect = STE.n_sect;
526 NDesc = STE.n_desc;
527 }
528
529 char Str[18] = "";
530 format("%02x", NSect).print(Str, sizeof(Str));
531 outs() << ' ' << Str << ' ';
532 format("%04x", NDesc).print(Str, sizeof(Str));
533 outs() << Str << ' ';
534 if (const char *stabString = getDarwinStabString(NType))
535 format("%5.5s", stabString).print(Str, sizeof(Str));
536 else
537 format(" %02x", NType).print(Str, sizeof(Str));
538 outs() << Str;
539 }
540
sortAndPrintSymbolList(SymbolicFile & Obj,bool printName,std::string ArchiveName,std::string ArchitectureName)541 static void sortAndPrintSymbolList(SymbolicFile &Obj, bool printName,
542 std::string ArchiveName,
543 std::string ArchitectureName) {
544 if (!NoSort) {
545 if (NumericSort)
546 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolAddress);
547 else if (SizeSort)
548 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolSize);
549 else
550 std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolName);
551 }
552
553 if (!PrintFileName) {
554 if (OutputFormat == posix && MultipleFiles && printName) {
555 outs() << '\n' << CurrentFilename << ":\n";
556 } else if (OutputFormat == bsd && MultipleFiles && printName) {
557 outs() << "\n" << CurrentFilename << ":\n";
558 } else if (OutputFormat == sysv) {
559 outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n"
560 << "Name Value Class Type"
561 << " Size Line Section\n";
562 }
563 }
564
565 const char *printBlanks, *printFormat;
566 if (isSymbolList64Bit(Obj)) {
567 printBlanks = " ";
568 printFormat = "%016" PRIx64;
569 } else {
570 printBlanks = " ";
571 printFormat = "%08" PRIx64;
572 }
573
574 for (SymbolListT::iterator I = SymbolList.begin(), E = SymbolList.end();
575 I != E; ++I) {
576 if ((I->TypeChar != 'U') && UndefinedOnly)
577 continue;
578 if ((I->TypeChar == 'U') && DefinedOnly)
579 continue;
580 if (SizeSort && !PrintAddress && I->Size == UnknownAddressOrSize)
581 continue;
582 if (PrintFileName) {
583 if (!ArchitectureName.empty())
584 outs() << "(for architecture " << ArchitectureName << "):";
585 if (!ArchiveName.empty())
586 outs() << ArchiveName << ":";
587 outs() << CurrentFilename << ": ";
588 }
589 if (JustSymbolName || (UndefinedOnly && isa<MachOObjectFile>(Obj))) {
590 outs() << I->Name << "\n";
591 continue;
592 }
593
594 char SymbolAddrStr[18] = "";
595 char SymbolSizeStr[18] = "";
596
597 if (OutputFormat == sysv || I->Address == UnknownAddressOrSize)
598 strcpy(SymbolAddrStr, printBlanks);
599 if (OutputFormat == sysv)
600 strcpy(SymbolSizeStr, printBlanks);
601
602 if (I->Address != UnknownAddressOrSize)
603 format(printFormat, I->Address)
604 .print(SymbolAddrStr, sizeof(SymbolAddrStr));
605 if (I->Size != UnknownAddressOrSize)
606 format(printFormat, I->Size).print(SymbolSizeStr, sizeof(SymbolSizeStr));
607
608 // If OutputFormat is darwin or we are printing Mach-O symbols in hex and
609 // we have a MachOObjectFile, call darwinPrintSymbol to print as darwin's
610 // nm(1) -m output or hex, else if OutputFormat is darwin or we are
611 // printing Mach-O symbols in hex and not a Mach-O object fall back to
612 // OutputFormat bsd (see below).
613 MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj);
614 if ((OutputFormat == darwin || FormatMachOasHex) && MachO) {
615 darwinPrintSymbol(MachO, I, SymbolAddrStr, printBlanks);
616 } else if (OutputFormat == posix) {
617 outs() << I->Name << " " << I->TypeChar << " " << SymbolAddrStr
618 << SymbolSizeStr << "\n";
619 } else if (OutputFormat == bsd || (OutputFormat == darwin && !MachO)) {
620 if (PrintAddress)
621 outs() << SymbolAddrStr << ' ';
622 if (PrintSize) {
623 outs() << SymbolSizeStr;
624 if (I->Size != UnknownAddressOrSize)
625 outs() << ' ';
626 }
627 outs() << I->TypeChar;
628 if (I->TypeChar == '-' && MachO)
629 darwinPrintStab(MachO, I);
630 outs() << " " << I->Name << "\n";
631 } else if (OutputFormat == sysv) {
632 std::string PaddedName(I->Name);
633 while (PaddedName.length() < 20)
634 PaddedName += " ";
635 outs() << PaddedName << "|" << SymbolAddrStr << "| " << I->TypeChar
636 << " | |" << SymbolSizeStr << "| |\n";
637 }
638 }
639
640 SymbolList.clear();
641 }
642
643 template <class ELFT>
getSymbolNMTypeChar(ELFObjectFile<ELFT> & Obj,basic_symbol_iterator I)644 static char getSymbolNMTypeChar(ELFObjectFile<ELFT> &Obj,
645 basic_symbol_iterator I) {
646 typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
647 typedef typename ELFObjectFile<ELFT>::Elf_Shdr Elf_Shdr;
648
649 // OK, this is ELF
650 symbol_iterator SymI(I);
651
652 DataRefImpl Symb = I->getRawDataRefImpl();
653 const Elf_Sym *ESym = Obj.getSymbol(Symb);
654 const ELFFile<ELFT> &EF = *Obj.getELFFile();
655 const Elf_Shdr *ESec = EF.getSection(ESym);
656
657 if (ESec) {
658 switch (ESec->sh_type) {
659 case ELF::SHT_PROGBITS:
660 case ELF::SHT_DYNAMIC:
661 switch (ESec->sh_flags) {
662 case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR):
663 return 't';
664 case (ELF::SHF_TLS | ELF::SHF_ALLOC | ELF::SHF_WRITE):
665 case (ELF::SHF_ALLOC | ELF::SHF_WRITE):
666 return 'd';
667 case ELF::SHF_ALLOC:
668 case (ELF::SHF_ALLOC | ELF::SHF_MERGE):
669 case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS):
670 return 'r';
671 }
672 break;
673 case ELF::SHT_NOBITS:
674 return 'b';
675 }
676 }
677
678 if (ESym->getType() == ELF::STT_SECTION) {
679 StringRef Name;
680 if (error(SymI->getName(Name)))
681 return '?';
682 return StringSwitch<char>(Name)
683 .StartsWith(".debug", 'N')
684 .StartsWith(".note", 'n')
685 .Default('?');
686 }
687
688 return '?';
689 }
690
getSymbolNMTypeChar(COFFObjectFile & Obj,symbol_iterator I)691 static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
692 COFFSymbolRef Symb = Obj.getCOFFSymbol(*I);
693 // OK, this is COFF.
694 symbol_iterator SymI(I);
695
696 StringRef Name;
697 if (error(SymI->getName(Name)))
698 return '?';
699
700 char Ret = StringSwitch<char>(Name)
701 .StartsWith(".debug", 'N')
702 .StartsWith(".sxdata", 'N')
703 .Default('?');
704
705 if (Ret != '?')
706 return Ret;
707
708 uint32_t Characteristics = 0;
709 if (!COFF::isReservedSectionNumber(Symb.getSectionNumber())) {
710 section_iterator SecI = Obj.section_end();
711 if (error(SymI->getSection(SecI)))
712 return '?';
713 const coff_section *Section = Obj.getCOFFSection(*SecI);
714 Characteristics = Section->Characteristics;
715 }
716
717 switch (Symb.getSectionNumber()) {
718 case COFF::IMAGE_SYM_DEBUG:
719 return 'n';
720 default:
721 // Check section type.
722 if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
723 return 't';
724 if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
725 return Characteristics & COFF::IMAGE_SCN_MEM_WRITE ? 'd' : 'r';
726 if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
727 return 'b';
728 if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
729 return 'i';
730 // Check for section symbol.
731 if (Symb.isSectionDefinition())
732 return 's';
733 }
734
735 return '?';
736 }
737
getNType(MachOObjectFile & Obj,DataRefImpl Symb)738 static uint8_t getNType(MachOObjectFile &Obj, DataRefImpl Symb) {
739 if (Obj.is64Bit()) {
740 MachO::nlist_64 STE = Obj.getSymbol64TableEntry(Symb);
741 return STE.n_type;
742 }
743 MachO::nlist STE = Obj.getSymbolTableEntry(Symb);
744 return STE.n_type;
745 }
746
getSymbolNMTypeChar(MachOObjectFile & Obj,basic_symbol_iterator I)747 static char getSymbolNMTypeChar(MachOObjectFile &Obj, basic_symbol_iterator I) {
748 DataRefImpl Symb = I->getRawDataRefImpl();
749 uint8_t NType = getNType(Obj, Symb);
750
751 if (NType & MachO::N_STAB)
752 return '-';
753
754 switch (NType & MachO::N_TYPE) {
755 case MachO::N_ABS:
756 return 's';
757 case MachO::N_INDR:
758 return 'i';
759 case MachO::N_SECT: {
760 section_iterator Sec = Obj.section_end();
761 Obj.getSymbolSection(Symb, Sec);
762 DataRefImpl Ref = Sec->getRawDataRefImpl();
763 StringRef SectionName;
764 Obj.getSectionName(Ref, SectionName);
765 StringRef SegmentName = Obj.getSectionFinalSegmentName(Ref);
766 if (SegmentName == "__TEXT" && SectionName == "__text")
767 return 't';
768 else if (SegmentName == "__DATA" && SectionName == "__data")
769 return 'd';
770 else if (SegmentName == "__DATA" && SectionName == "__bss")
771 return 'b';
772 else
773 return 's';
774 }
775 }
776
777 return '?';
778 }
779
getSymbolNMTypeChar(const GlobalValue & GV)780 static char getSymbolNMTypeChar(const GlobalValue &GV) {
781 if (GV.getType()->getElementType()->isFunctionTy())
782 return 't';
783 // FIXME: should we print 'b'? At the IR level we cannot be sure if this
784 // will be in bss or not, but we could approximate.
785 return 'd';
786 }
787
getSymbolNMTypeChar(IRObjectFile & Obj,basic_symbol_iterator I)788 static char getSymbolNMTypeChar(IRObjectFile &Obj, basic_symbol_iterator I) {
789 const GlobalValue *GV = Obj.getSymbolGV(I->getRawDataRefImpl());
790 if (!GV)
791 return 't';
792 return getSymbolNMTypeChar(*GV);
793 }
794
795 template <class ELFT>
isELFObject(ELFObjectFile<ELFT> & Obj,symbol_iterator I)796 static bool isELFObject(ELFObjectFile<ELFT> &Obj, symbol_iterator I) {
797 typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
798
799 DataRefImpl Symb = I->getRawDataRefImpl();
800 const Elf_Sym *ESym = Obj.getSymbol(Symb);
801
802 return ESym->getType() == ELF::STT_OBJECT;
803 }
804
isObject(SymbolicFile & Obj,basic_symbol_iterator I)805 static bool isObject(SymbolicFile &Obj, basic_symbol_iterator I) {
806 if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(&Obj))
807 return isELFObject(*ELF, I);
808 if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(&Obj))
809 return isELFObject(*ELF, I);
810 if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(&Obj))
811 return isELFObject(*ELF, I);
812 if (ELF64BEObjectFile *ELF = dyn_cast<ELF64BEObjectFile>(&Obj))
813 return isELFObject(*ELF, I);
814 return false;
815 }
816
getNMTypeChar(SymbolicFile & Obj,basic_symbol_iterator I)817 static char getNMTypeChar(SymbolicFile &Obj, basic_symbol_iterator I) {
818 uint32_t Symflags = I->getFlags();
819 if ((Symflags & object::SymbolRef::SF_Weak) && !isa<MachOObjectFile>(Obj)) {
820 char Ret = isObject(Obj, I) ? 'v' : 'w';
821 if (!(Symflags & object::SymbolRef::SF_Undefined))
822 Ret = toupper(Ret);
823 return Ret;
824 }
825
826 if (Symflags & object::SymbolRef::SF_Undefined)
827 return 'U';
828
829 if (Symflags & object::SymbolRef::SF_Common)
830 return 'C';
831
832 char Ret = '?';
833 if (Symflags & object::SymbolRef::SF_Absolute)
834 Ret = 'a';
835 else if (IRObjectFile *IR = dyn_cast<IRObjectFile>(&Obj))
836 Ret = getSymbolNMTypeChar(*IR, I);
837 else if (COFFObjectFile *COFF = dyn_cast<COFFObjectFile>(&Obj))
838 Ret = getSymbolNMTypeChar(*COFF, I);
839 else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj))
840 Ret = getSymbolNMTypeChar(*MachO, I);
841 else if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(&Obj))
842 Ret = getSymbolNMTypeChar(*ELF, I);
843 else if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(&Obj))
844 Ret = getSymbolNMTypeChar(*ELF, I);
845 else if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(&Obj))
846 Ret = getSymbolNMTypeChar(*ELF, I);
847 else
848 Ret = getSymbolNMTypeChar(cast<ELF64BEObjectFile>(Obj), I);
849
850 if (Symflags & object::SymbolRef::SF_Global)
851 Ret = toupper(Ret);
852
853 return Ret;
854 }
855
856 // getNsectForSegSect() is used to implement the Mach-O "-s segname sectname"
857 // option to dump only those symbols from that section in a Mach-O file.
858 // It is called once for each Mach-O file from dumpSymbolNamesFromObject()
859 // to get the section number for that named section from the command line
860 // arguments. It returns the section number for that section in the Mach-O
861 // file or zero it is not present.
getNsectForSegSect(MachOObjectFile * Obj)862 static unsigned getNsectForSegSect(MachOObjectFile *Obj) {
863 unsigned Nsect = 1;
864 for (section_iterator I = Obj->section_begin(), E = Obj->section_end();
865 I != E; ++I) {
866 DataRefImpl Ref = I->getRawDataRefImpl();
867 StringRef SectionName;
868 Obj->getSectionName(Ref, SectionName);
869 StringRef SegmentName = Obj->getSectionFinalSegmentName(Ref);
870 if (SegmentName == SegSect[0] && SectionName == SegSect[1])
871 return Nsect;
872 Nsect++;
873 }
874 return 0;
875 }
876
877 // getNsectInMachO() is used to implement the Mach-O "-s segname sectname"
878 // option to dump only those symbols from that section in a Mach-O file.
879 // It is called once for each symbol in a Mach-O file from
880 // dumpSymbolNamesFromObject() and returns the section number for that symbol
881 // if it is in a section, else it returns 0.
getNsectInMachO(MachOObjectFile & Obj,basic_symbol_iterator I)882 static unsigned getNsectInMachO(MachOObjectFile &Obj, basic_symbol_iterator I) {
883 DataRefImpl Symb = I->getRawDataRefImpl();
884 if (Obj.is64Bit()) {
885 MachO::nlist_64 STE = Obj.getSymbol64TableEntry(Symb);
886 if ((STE.n_type & MachO::N_TYPE) == MachO::N_SECT)
887 return STE.n_sect;
888 return 0;
889 }
890 MachO::nlist STE = Obj.getSymbolTableEntry(Symb);
891 if ((STE.n_type & MachO::N_TYPE) == MachO::N_SECT)
892 return STE.n_sect;
893 return 0;
894 }
895
dumpSymbolNamesFromObject(SymbolicFile & Obj,bool printName,std::string ArchiveName=std::string (),std::string ArchitectureName=std::string ())896 static void dumpSymbolNamesFromObject(SymbolicFile &Obj, bool printName,
897 std::string ArchiveName = std::string(),
898 std::string ArchitectureName =
899 std::string()) {
900 basic_symbol_iterator IBegin = Obj.symbol_begin();
901 basic_symbol_iterator IEnd = Obj.symbol_end();
902 if (DynamicSyms) {
903 if (!Obj.isELF()) {
904 error("File format has no dynamic symbol table", Obj.getFileName());
905 return;
906 }
907 std::pair<symbol_iterator, symbol_iterator> IDyn =
908 getELFDynamicSymbolIterators(&Obj);
909 IBegin = IDyn.first;
910 IEnd = IDyn.second;
911 }
912 std::string NameBuffer;
913 raw_string_ostream OS(NameBuffer);
914 // If a "-s segname sectname" option was specified and this is a Mach-O
915 // file get the section number for that section in this object file.
916 unsigned int Nsect = 0;
917 MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj);
918 if (SegSect.size() != 0 && MachO) {
919 Nsect = getNsectForSegSect(MachO);
920 // If this section is not in the object file no symbols are printed.
921 if (Nsect == 0)
922 return;
923 }
924 for (basic_symbol_iterator I = IBegin; I != IEnd; ++I) {
925 uint32_t SymFlags = I->getFlags();
926 if (!DebugSyms && (SymFlags & SymbolRef::SF_FormatSpecific))
927 continue;
928 if (WithoutAliases) {
929 if (IRObjectFile *IR = dyn_cast<IRObjectFile>(&Obj)) {
930 const GlobalValue *GV = IR->getSymbolGV(I->getRawDataRefImpl());
931 if (GV && isa<GlobalAlias>(GV))
932 continue;
933 }
934 }
935 // If a "-s segname sectname" option was specified and this is a Mach-O
936 // file and this section appears in this file, Nsect will be non-zero then
937 // see if this symbol is a symbol from that section and if not skip it.
938 if (Nsect && Nsect != getNsectInMachO(*MachO, I))
939 continue;
940 NMSymbol S;
941 S.Size = UnknownAddressOrSize;
942 S.Address = UnknownAddressOrSize;
943 if ((PrintSize || SizeSort) && isa<ObjectFile>(Obj)) {
944 symbol_iterator SymI = I;
945 if (error(SymI->getSize(S.Size)))
946 break;
947 }
948 if (PrintAddress && isa<ObjectFile>(Obj))
949 if (error(symbol_iterator(I)->getAddress(S.Address)))
950 break;
951 S.TypeChar = getNMTypeChar(Obj, I);
952 if (error(I->printName(OS)))
953 break;
954 OS << '\0';
955 S.Symb = I->getRawDataRefImpl();
956 SymbolList.push_back(S);
957 }
958
959 OS.flush();
960 const char *P = NameBuffer.c_str();
961 for (unsigned I = 0; I < SymbolList.size(); ++I) {
962 SymbolList[I].Name = P;
963 P += strlen(P) + 1;
964 }
965
966 CurrentFilename = Obj.getFileName();
967 sortAndPrintSymbolList(Obj, printName, ArchiveName, ArchitectureName);
968 }
969
970 // checkMachOAndArchFlags() checks to see if the SymbolicFile is a Mach-O file
971 // and if it is and there is a list of architecture flags is specified then
972 // check to make sure this Mach-O file is one of those architectures or all
973 // architectures was specificed. If not then an error is generated and this
974 // routine returns false. Else it returns true.
checkMachOAndArchFlags(SymbolicFile * O,std::string & Filename)975 static bool checkMachOAndArchFlags(SymbolicFile *O, std::string &Filename) {
976 if (isa<MachOObjectFile>(O) && !ArchAll && ArchFlags.size() != 0) {
977 MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(O);
978 bool ArchFound = false;
979 MachO::mach_header H;
980 MachO::mach_header_64 H_64;
981 Triple T;
982 if (MachO->is64Bit()) {
983 H_64 = MachO->MachOObjectFile::getHeader64();
984 T = MachOObjectFile::getArch(H_64.cputype, H_64.cpusubtype);
985 } else {
986 H = MachO->MachOObjectFile::getHeader();
987 T = MachOObjectFile::getArch(H.cputype, H.cpusubtype);
988 }
989 unsigned i;
990 for (i = 0; i < ArchFlags.size(); ++i) {
991 if (ArchFlags[i] == T.getArchName())
992 ArchFound = true;
993 break;
994 }
995 if (!ArchFound) {
996 error(ArchFlags[i],
997 "file: " + Filename + " does not contain architecture");
998 return false;
999 }
1000 }
1001 return true;
1002 }
1003
dumpSymbolNamesFromFile(std::string & Filename)1004 static void dumpSymbolNamesFromFile(std::string &Filename) {
1005 ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
1006 MemoryBuffer::getFileOrSTDIN(Filename);
1007 if (error(BufferOrErr.getError(), Filename))
1008 return;
1009
1010 LLVMContext &Context = getGlobalContext();
1011 ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(
1012 BufferOrErr.get()->getMemBufferRef(), NoLLVMBitcode ? nullptr : &Context);
1013 if (error(BinaryOrErr.getError(), Filename))
1014 return;
1015 Binary &Bin = *BinaryOrErr.get();
1016
1017 if (Archive *A = dyn_cast<Archive>(&Bin)) {
1018 if (ArchiveMap) {
1019 Archive::symbol_iterator I = A->symbol_begin();
1020 Archive::symbol_iterator E = A->symbol_end();
1021 if (I != E) {
1022 outs() << "Archive map\n";
1023 for (; I != E; ++I) {
1024 ErrorOr<Archive::child_iterator> C = I->getMember();
1025 if (error(C.getError()))
1026 return;
1027 ErrorOr<StringRef> FileNameOrErr = C.get()->getName();
1028 if (error(FileNameOrErr.getError()))
1029 return;
1030 StringRef SymName = I->getName();
1031 outs() << SymName << " in " << FileNameOrErr.get() << "\n";
1032 }
1033 outs() << "\n";
1034 }
1035 }
1036
1037 for (Archive::child_iterator I = A->child_begin(), E = A->child_end();
1038 I != E; ++I) {
1039 ErrorOr<std::unique_ptr<Binary>> ChildOrErr = I->getAsBinary(&Context);
1040 if (ChildOrErr.getError())
1041 continue;
1042 if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
1043 if (!checkMachOAndArchFlags(O, Filename))
1044 return;
1045 if (!PrintFileName) {
1046 outs() << "\n";
1047 if (isa<MachOObjectFile>(O)) {
1048 outs() << Filename << "(" << O->getFileName() << ")";
1049 } else
1050 outs() << O->getFileName();
1051 outs() << ":\n";
1052 }
1053 dumpSymbolNamesFromObject(*O, false, Filename);
1054 }
1055 }
1056 return;
1057 }
1058 if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(&Bin)) {
1059 // If we have a list of architecture flags specified dump only those.
1060 if (!ArchAll && ArchFlags.size() != 0) {
1061 // Look for a slice in the universal binary that matches each ArchFlag.
1062 bool ArchFound;
1063 for (unsigned i = 0; i < ArchFlags.size(); ++i) {
1064 ArchFound = false;
1065 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
1066 E = UB->end_objects();
1067 I != E; ++I) {
1068 if (ArchFlags[i] == I->getArchTypeName()) {
1069 ArchFound = true;
1070 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
1071 I->getAsObjectFile();
1072 std::string ArchiveName;
1073 std::string ArchitectureName;
1074 ArchiveName.clear();
1075 ArchitectureName.clear();
1076 if (ObjOrErr) {
1077 ObjectFile &Obj = *ObjOrErr.get();
1078 if (ArchFlags.size() > 1) {
1079 if (PrintFileName)
1080 ArchitectureName = I->getArchTypeName();
1081 else
1082 outs() << "\n" << Obj.getFileName() << " (for architecture "
1083 << I->getArchTypeName() << ")"
1084 << ":\n";
1085 }
1086 dumpSymbolNamesFromObject(Obj, false, ArchiveName,
1087 ArchitectureName);
1088 } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
1089 I->getAsArchive()) {
1090 std::unique_ptr<Archive> &A = *AOrErr;
1091 for (Archive::child_iterator AI = A->child_begin(),
1092 AE = A->child_end();
1093 AI != AE; ++AI) {
1094 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
1095 AI->getAsBinary(&Context);
1096 if (ChildOrErr.getError())
1097 continue;
1098 if (SymbolicFile *O =
1099 dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
1100 if (PrintFileName) {
1101 ArchiveName = A->getFileName();
1102 if (ArchFlags.size() > 1)
1103 ArchitectureName = I->getArchTypeName();
1104 } else {
1105 outs() << "\n" << A->getFileName();
1106 outs() << "(" << O->getFileName() << ")";
1107 if (ArchFlags.size() > 1) {
1108 outs() << " (for architecture " << I->getArchTypeName()
1109 << ")";
1110 }
1111 outs() << ":\n";
1112 }
1113 dumpSymbolNamesFromObject(*O, false, ArchiveName,
1114 ArchitectureName);
1115 }
1116 }
1117 }
1118 }
1119 }
1120 if (!ArchFound) {
1121 error(ArchFlags[i],
1122 "file: " + Filename + " does not contain architecture");
1123 return;
1124 }
1125 }
1126 return;
1127 }
1128 // No architecture flags were specified so if this contains a slice that
1129 // matches the host architecture dump only that.
1130 if (!ArchAll) {
1131 StringRef HostArchName = MachOObjectFile::getHostArch().getArchName();
1132 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
1133 E = UB->end_objects();
1134 I != E; ++I) {
1135 if (HostArchName == I->getArchTypeName()) {
1136 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
1137 std::string ArchiveName;
1138 ArchiveName.clear();
1139 if (ObjOrErr) {
1140 ObjectFile &Obj = *ObjOrErr.get();
1141 dumpSymbolNamesFromObject(Obj, false);
1142 } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
1143 I->getAsArchive()) {
1144 std::unique_ptr<Archive> &A = *AOrErr;
1145 for (Archive::child_iterator AI = A->child_begin(),
1146 AE = A->child_end();
1147 AI != AE; ++AI) {
1148 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
1149 AI->getAsBinary(&Context);
1150 if (ChildOrErr.getError())
1151 continue;
1152 if (SymbolicFile *O =
1153 dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
1154 if (PrintFileName)
1155 ArchiveName = A->getFileName();
1156 else
1157 outs() << "\n" << A->getFileName() << "(" << O->getFileName()
1158 << ")"
1159 << ":\n";
1160 dumpSymbolNamesFromObject(*O, false, ArchiveName);
1161 }
1162 }
1163 }
1164 return;
1165 }
1166 }
1167 }
1168 // Either all architectures have been specified or none have been specified
1169 // and this does not contain the host architecture so dump all the slices.
1170 bool moreThanOneArch = UB->getNumberOfObjects() > 1;
1171 for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
1172 E = UB->end_objects();
1173 I != E; ++I) {
1174 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
1175 std::string ArchiveName;
1176 std::string ArchitectureName;
1177 ArchiveName.clear();
1178 ArchitectureName.clear();
1179 if (ObjOrErr) {
1180 ObjectFile &Obj = *ObjOrErr.get();
1181 if (PrintFileName) {
1182 if (isa<MachOObjectFile>(Obj) && moreThanOneArch)
1183 ArchitectureName = I->getArchTypeName();
1184 } else {
1185 if (moreThanOneArch)
1186 outs() << "\n";
1187 outs() << Obj.getFileName();
1188 if (isa<MachOObjectFile>(Obj) && moreThanOneArch)
1189 outs() << " (for architecture " << I->getArchTypeName() << ")";
1190 outs() << ":\n";
1191 }
1192 dumpSymbolNamesFromObject(Obj, false, ArchiveName, ArchitectureName);
1193 } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr = I->getAsArchive()) {
1194 std::unique_ptr<Archive> &A = *AOrErr;
1195 for (Archive::child_iterator AI = A->child_begin(), AE = A->child_end();
1196 AI != AE; ++AI) {
1197 ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
1198 AI->getAsBinary(&Context);
1199 if (ChildOrErr.getError())
1200 continue;
1201 if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
1202 if (PrintFileName) {
1203 ArchiveName = A->getFileName();
1204 if (isa<MachOObjectFile>(O) && moreThanOneArch)
1205 ArchitectureName = I->getArchTypeName();
1206 } else {
1207 outs() << "\n" << A->getFileName();
1208 if (isa<MachOObjectFile>(O)) {
1209 outs() << "(" << O->getFileName() << ")";
1210 if (moreThanOneArch)
1211 outs() << " (for architecture " << I->getArchTypeName()
1212 << ")";
1213 } else
1214 outs() << ":" << O->getFileName();
1215 outs() << ":\n";
1216 }
1217 dumpSymbolNamesFromObject(*O, false, ArchiveName, ArchitectureName);
1218 }
1219 }
1220 }
1221 }
1222 return;
1223 }
1224 if (SymbolicFile *O = dyn_cast<SymbolicFile>(&Bin)) {
1225 if (!checkMachOAndArchFlags(O, Filename))
1226 return;
1227 dumpSymbolNamesFromObject(*O, true);
1228 return;
1229 }
1230 error("unrecognizable file type", Filename);
1231 return;
1232 }
1233
main(int argc,char ** argv)1234 int main(int argc, char **argv) {
1235 // Print a stack trace if we signal out.
1236 sys::PrintStackTraceOnErrorSignal();
1237 PrettyStackTraceProgram X(argc, argv);
1238
1239 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
1240 cl::ParseCommandLineOptions(argc, argv, "llvm symbol table dumper\n");
1241
1242 // llvm-nm only reads binary files.
1243 if (error(sys::ChangeStdinToBinary()))
1244 return 1;
1245
1246 llvm::InitializeAllTargetInfos();
1247 llvm::InitializeAllTargetMCs();
1248 llvm::InitializeAllAsmParsers();
1249
1250 ToolName = argv[0];
1251 if (BSDFormat)
1252 OutputFormat = bsd;
1253 if (POSIXFormat)
1254 OutputFormat = posix;
1255 if (DarwinFormat)
1256 OutputFormat = darwin;
1257
1258 // The relative order of these is important. If you pass --size-sort it should
1259 // only print out the size. However, if you pass -S --size-sort, it should
1260 // print out both the size and address.
1261 if (SizeSort && !PrintSize)
1262 PrintAddress = false;
1263 if (OutputFormat == sysv || SizeSort)
1264 PrintSize = true;
1265
1266 switch (InputFilenames.size()) {
1267 case 0:
1268 InputFilenames.push_back("a.out");
1269 case 1:
1270 break;
1271 default:
1272 MultipleFiles = true;
1273 }
1274
1275 for (unsigned i = 0; i < ArchFlags.size(); ++i) {
1276 if (ArchFlags[i] == "all") {
1277 ArchAll = true;
1278 } else {
1279 if (!MachOObjectFile::isValidArch(ArchFlags[i]))
1280 error("Unknown architecture named '" + ArchFlags[i] + "'",
1281 "for the -arch option");
1282 }
1283 }
1284
1285 if (SegSect.size() != 0 && SegSect.size() != 2)
1286 error("bad number of arguments (must be two arguments)",
1287 "for the -s option");
1288
1289 std::for_each(InputFilenames.begin(), InputFilenames.end(),
1290 dumpSymbolNamesFromFile);
1291
1292 if (HadError)
1293 return 1;
1294
1295 return 0;
1296 }
1297