gold/symtab.cc

   1 // symtab.cc -- the gold symbol table
   2
   3 #include "gold.h"
   4
   5 #include <stdint.h>
   6 #include <string>
   7 #include <utility>
   8
   9 #include "object.h"
  10 #include "dynobj.h"
  11 #include "output.h"
  12 #include "target.h"
  13 #include "workqueue.h"
  14 #include "symtab.h"
  15
  16 namespace gold
  17 {
  18
  19 // Class Symbol.
  20
  21 // Initialize fields in Symbol.  This initializes everything except u_
  22 // and source_.
  23
  24 void
  25 Symbol::init_fields(const char* name, const char* version,
  26                     elfcpp::STT type, elfcpp::STB binding,
  27                     elfcpp::STV visibility, unsigned char nonvis)
  28 {
  29   this->name_ = name;
  30   this->version_ = version;
  31   this->symtab_index_ = 0;
  32   this->dynsym_index_ = 0;
  33   this->got_offset_ = 0;
  34   this->type_ = type;
  35   this->binding_ = binding;
  36   this->visibility_ = visibility;
  37   this->nonvis_ = nonvis;
  38   this->is_target_special_ = false;
  39   this->is_def_ = false;
  40   this->is_forwarder_ = false;
  41   this->needs_dynsym_entry_ = false;
  42   this->in_dyn_ = false;
  43   this->has_got_offset_ = false;
  44   this->has_warning_ = false;
  45 }
  46
  47 // Initialize the fields in the base class Symbol for SYM in OBJECT.
  48
  49 template<int size, bool big_endian>
  50 void
  51 Symbol::init_base(const char* name, const char* version, Object* object,
  52                   const elfcpp::Sym<size, big_endian>& sym)
  53 {
  54   this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(),
  55                     sym.get_st_visibility(), sym.get_st_nonvis());
  56   this->u_.from_object.object = object;
  57   // FIXME: Handle SHN_XINDEX.
  58   this->u_.from_object.shnum = sym.get_st_shndx();
  59   this->source_ = FROM_OBJECT;
  60   this->in_dyn_ = object->is_dynamic();
  61 }
  62
  63 // Initialize the fields in the base class Symbol for a symbol defined
  64 // in an Output_data.
  65
  66 void
  67 Symbol::init_base(const char* name, Output_data* od, elfcpp::STT type,
  68                   elfcpp::STB binding, elfcpp::STV visibility,
  69                   unsigned char nonvis, bool offset_is_from_end)
  70 {
  71   this->init_fields(name, NULL, type, binding, visibility, nonvis);
  72   this->u_.in_output_data.output_data = od;
  73   this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
  74   this->source_ = IN_OUTPUT_DATA;
  75 }
  76
  77 // Initialize the fields in the base class Symbol for a symbol defined
  78 // in an Output_segment.
  79
  80 void
  81 Symbol::init_base(const char* name, Output_segment* os, elfcpp::STT type,
  82                   elfcpp::STB binding, elfcpp::STV visibility,
  83                   unsigned char nonvis, Segment_offset_base offset_base)
  84 {
  85   this->init_fields(name, NULL, type, binding, visibility, nonvis);
  86   this->u_.in_output_segment.output_segment = os;
  87   this->u_.in_output_segment.offset_base = offset_base;
  88   this->source_ = IN_OUTPUT_SEGMENT;
  89 }
  90
  91 // Initialize the fields in the base class Symbol for a symbol defined
  92 // as a constant.
  93
  94 void
  95 Symbol::init_base(const char* name, elfcpp::STT type,
  96                   elfcpp::STB binding, elfcpp::STV visibility,
  97                   unsigned char nonvis)
  98 {
  99   this->init_fields(name, NULL, type, binding, visibility, nonvis);
 100   this->source_ = CONSTANT;
 101 }
 102
 103 // Initialize the fields in Sized_symbol for SYM in OBJECT.
 104
 105 template<int size>
 106 template<bool big_endian>
 107 void
 108 Sized_symbol<size>::init(const char* name, const char* version, Object* object,
 109                          const elfcpp::Sym<size, big_endian>& sym)
 110 {
 111   this->init_base(name, version, object, sym);
 112   this->value_ = sym.get_st_value();
 113   this->symsize_ = sym.get_st_size();
 114 }
 115
 116 // Initialize the fields in Sized_symbol for a symbol defined in an
 117 // Output_data.
 118
 119 template<int size>
 120 void
 121 Sized_symbol<size>::init(const char* name, Output_data* od,
 122                          Value_type value, Size_type symsize,
 123                          elfcpp::STT type, elfcpp::STB binding,
 124                          elfcpp::STV visibility, unsigned char nonvis,
 125                          bool offset_is_from_end)
 126 {
 127   this->init_base(name, od, type, binding, visibility, nonvis,
 128                   offset_is_from_end);
 129   this->value_ = value;
 130   this->symsize_ = symsize;
 131 }
 132
 133 // Initialize the fields in Sized_symbol for a symbol defined in an
 134 // Output_segment.
 135
 136 template<int size>
 137 void
 138 Sized_symbol<size>::init(const char* name, Output_segment* os,
 139                          Value_type value, Size_type symsize,
 140                          elfcpp::STT type, elfcpp::STB binding,
 141                          elfcpp::STV visibility, unsigned char nonvis,
 142                          Segment_offset_base offset_base)
 143 {
 144   this->init_base(name, os, type, binding, visibility, nonvis, offset_base);
 145   this->value_ = value;
 146   this->symsize_ = symsize;
 147 }
 148
 149 // Initialize the fields in Sized_symbol for a symbol defined as a
 150 // constant.
 151
 152 template<int size>
 153 void
 154 Sized_symbol<size>::init(const char* name, Value_type value, Size_type symsize,
 155                          elfcpp::STT type, elfcpp::STB binding,
 156                          elfcpp::STV visibility, unsigned char nonvis)
 157 {
 158   this->init_base(name, type, binding, visibility, nonvis);
 159   this->value_ = value;
 160   this->symsize_ = symsize;
 161 }
 162
 163 // Class Symbol_table.
 164
 165 Symbol_table::Symbol_table()
 166   : size_(0), saw_undefined_(0), offset_(0), table_(), namepool_(),
 167     forwarders_(), commons_(), warnings_()
 168 {
 169 }
 170
 171 Symbol_table::~Symbol_table()
 172 {
 173 }
 174
 175 // The hash function.  The key is always canonicalized, so we use a
 176 // simple combination of the pointers.
 177
 178 size_t
 179 Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const
 180 {
 181   return key.first ^ key.second;
 182 }
 183
 184 // The symbol table key equality function.  This is only called with
 185 // canonicalized name and version strings, so we can use pointer
 186 // comparison.
 187
 188 bool
 189 Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1,
 190                                           const Symbol_table_key& k2) const
 191 {
 192   return k1.first == k2.first && k1.second == k2.second;
 193 }
 194
 195 // Make TO a symbol which forwards to FROM.
 196
 197 void
 198 Symbol_table::make_forwarder(Symbol* from, Symbol* to)
 199 {
 200   gold_assert(from != to);
 201   gold_assert(!from->is_forwarder() && !to->is_forwarder());
 202   this->forwarders_[from] = to;
 203   from->set_forwarder();
 204 }
 205
 206 // Resolve the forwards from FROM, returning the real symbol.
 207
 208 Symbol*
 209 Symbol_table::resolve_forwards(const Symbol* from) const
 210 {
 211   gold_assert(from->is_forwarder());
 212   Unordered_map<const Symbol*, Symbol*>::const_iterator p =
 213     this->forwarders_.find(from);
 214   gold_assert(p != this->forwarders_.end());
 215   return p->second;
 216 }
 217
 218 // Look up a symbol by name.
 219
 220 Symbol*
 221 Symbol_table::lookup(const char* name, const char* version) const
 222 {
 223   Stringpool::Key name_key;
 224   name = this->namepool_.find(name, &name_key);
 225   if (name == NULL)
 226     return NULL;
 227
 228   Stringpool::Key version_key = 0;
 229   if (version != NULL)
 230     {
 231       version = this->namepool_.find(version, &version_key);
 232       if (version == NULL)
 233         return NULL;
 234     }
 235
 236   Symbol_table_key key(name_key, version_key);
 237   Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
 238   if (p == this->table_.end())
 239     return NULL;
 240   return p->second;
 241 }
 242
 243 // Resolve a Symbol with another Symbol.  This is only used in the
 244 // unusual case where there are references to both an unversioned
 245 // symbol and a symbol with a version, and we then discover that that
 246 // version is the default version.  Because this is unusual, we do
 247 // this the slow way, by converting back to an ELF symbol.
 248
 249 template<int size, bool big_endian>
 250 void
 251 Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from
 252                       ACCEPT_SIZE_ENDIAN)
 253 {
 254   unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
 255   elfcpp::Sym_write<size, big_endian> esym(buf);
 256   // We don't bother to set the st_name field.
 257   esym.put_st_value(from->value());
 258   esym.put_st_size(from->symsize());
 259   esym.put_st_info(from->binding(), from->type());
 260   esym.put_st_other(from->visibility(), from->nonvis());
 261   esym.put_st_shndx(from->shnum());
 262   Symbol_table::resolve(to, esym.sym(), from->object());
 263 }
 264
 265 // Add one symbol from OBJECT to the symbol table.  NAME is symbol
 266 // name and VERSION is the version; both are canonicalized.  DEF is
 267 // whether this is the default version.
 268
 269 // If DEF is true, then this is the definition of a default version of
 270 // a symbol.  That means that any lookup of NAME/NULL and any lookup
 271 // of NAME/VERSION should always return the same symbol.  This is
 272 // obvious for references, but in particular we want to do this for
 273 // definitions: overriding NAME/NULL should also override
 274 // NAME/VERSION.  If we don't do that, it would be very hard to
 275 // override functions in a shared library which uses versioning.
 276
 277 // We implement this by simply making both entries in the hash table
 278 // point to the same Symbol structure.  That is easy enough if this is
 279 // the first time we see NAME/NULL or NAME/VERSION, but it is possible
 280 // that we have seen both already, in which case they will both have
 281 // independent entries in the symbol table.  We can't simply change
 282 // the symbol table entry, because we have pointers to the entries
 283 // attached to the object files.  So we mark the entry attached to the
 284 // object file as a forwarder, and record it in the forwarders_ map.
 285 // Note that entries in the hash table will never be marked as
 286 // forwarders.
 287
 288 template<int size, bool big_endian>
 289 Symbol*
 290 Symbol_table::add_from_object(Object* object,
 291                               const char *name,
 292                               Stringpool::Key name_key,
 293                               const char *version,
 294                               Stringpool::Key version_key,
 295                               bool def,
 296                               const elfcpp::Sym<size, big_endian>& sym)
 297 {
 298   Symbol* const snull = NULL;
 299   std::pair<typename Symbol_table_type::iterator, bool> ins =
 300     this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
 301                                        snull));
 302
 303   std::pair<typename Symbol_table_type::iterator, bool> insdef =
 304     std::make_pair(this->table_.end(), false);
 305   if (def)
 306     {
 307       const Stringpool::Key vnull_key = 0;
 308       insdef = this->table_.insert(std::make_pair(std::make_pair(name_key,
 309                                                                  vnull_key),
 310                                                   snull));
 311     }
 312
 313   // ins.first: an iterator, which is a pointer to a pair.
 314   // ins.first->first: the key (a pair of name and version).
 315   // ins.first->second: the value (Symbol*).
 316   // ins.second: true if new entry was inserted, false if not.
 317
 318   Sized_symbol<size>* ret;
 319   bool was_undefined;
 320   bool was_common;
 321   if (!ins.second)
 322     {
 323       // We already have an entry for NAME/VERSION.
 324       ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (ins.first->second
 325                                                            SELECT_SIZE(size));
 326       gold_assert(ret != NULL);
 327
 328       was_undefined = ret->is_undefined();
 329       was_common = ret->is_common();
 330
 331       Symbol_table::resolve(ret, sym, object);
 332
 333       if (def)
 334         {
 335           if (insdef.second)
 336             {
 337               // This is the first time we have seen NAME/NULL.  Make
 338               // NAME/NULL point to NAME/VERSION.
 339               insdef.first->second = ret;
 340             }
 341           else if (insdef.first->second != ret)
 342             {
 343               // This is the unfortunate case where we already have
 344               // entries for both NAME/VERSION and NAME/NULL.
 345               const Sized_symbol<size>* sym2;
 346               sym2 = this->get_sized_symbol SELECT_SIZE_NAME(size) (
 347                 insdef.first->second
 348                 SELECT_SIZE(size));
 349               Symbol_table::resolve SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
 350                 ret, sym2 SELECT_SIZE_ENDIAN(size, big_endian));
 351               this->make_forwarder(insdef.first->second, ret);
 352               insdef.first->second = ret;
 353             }
 354         }
 355     }
 356   else
 357     {
 358       // This is the first time we have seen NAME/VERSION.
 359       gold_assert(ins.first->second == NULL);
 360
 361       was_undefined = false;
 362       was_common = false;
 363
 364       if (def && !insdef.second)
 365         {
 366           // We already have an entry for NAME/NULL.  Make
 367           // NAME/VERSION point to it.
 368           ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (
 369               insdef.first->second
 370               SELECT_SIZE(size));
 371           Symbol_table::resolve(ret, sym, object);
 372           ins.first->second = ret;
 373         }
 374       else
 375         {
 376           Sized_target<size, big_endian>* target =
 377             object->sized_target SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
 378                 SELECT_SIZE_ENDIAN_ONLY(size, big_endian));
 379           if (!target->has_make_symbol())
 380             ret = new Sized_symbol<size>();
 381           else
 382             {
 383               ret = target->make_symbol();
 384               if (ret == NULL)
 385                 {
 386                   // This means that we don't want a symbol table
 387                   // entry after all.
 388                   if (!def)
 389                     this->table_.erase(ins.first);
 390                   else
 391                     {
 392                       this->table_.erase(insdef.first);
 393                       // Inserting insdef invalidated ins.
 394                       this->table_.erase(std::make_pair(name_key,
 395                                                         version_key));
 396                     }
 397                   return NULL;
 398                 }
 399             }
 400
 401           ret->init(name, version, object, sym);
 402
 403           ins.first->second = ret;
 404           if (def)
 405             {
 406               // This is the first time we have seen NAME/NULL.  Point
 407               // it at the new entry for NAME/VERSION.
 408               gold_assert(insdef.second);
 409               insdef.first->second = ret;
 410             }
 411         }
 412     }
 413
 414   // Record every time we see a new undefined symbol, to speed up
 415   // archive groups.
 416   if (!was_undefined && ret->is_undefined())
 417     ++this->saw_undefined_;
 418
 419   // Keep track of common symbols, to speed up common symbol
 420   // allocation.
 421   if (!was_common && ret->is_common())
 422     this->commons_.push_back(ret);
 423
 424   return ret;
 425 }
 426
 427 // Add all the symbols in a relocatable object to the hash table.
 428
 429 template<int size, bool big_endian>
 430 void
 431 Symbol_table::add_from_relobj(
 432     Sized_relobj<size, big_endian>* relobj,
 433     const unsigned char* syms,
 434     size_t count,
 435     const char* sym_names,
 436     size_t sym_name_size,
 437     Symbol** sympointers)
 438 {
 439   // We take the size from the first object we see.
 440   if (this->get_size() == 0)
 441     this->set_size(size);
 442
 443   if (size != this->get_size() || size != relobj->target()->get_size())
 444     {
 445       fprintf(stderr, _("%s: %s: mixing 32-bit and 64-bit ELF objects\n"),
 446               program_name, relobj->name().c_str());
 447       gold_exit(false);
 448     }
 449
 450   const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
 451
 452   const unsigned char* p = syms;
 453   for (size_t i = 0; i < count; ++i, p += sym_size)
 454     {
 455       elfcpp::Sym<size, big_endian> sym(p);
 456       elfcpp::Sym<size, big_endian>* psym = &sym;
 457
 458       unsigned int st_name = psym->get_st_name();
 459       if (st_name >= sym_name_size)
 460         {
 461           fprintf(stderr,
 462                   _("%s: %s: bad global symbol name offset %u at %lu\n"),
 463                   program_name, relobj->name().c_str(), st_name,
 464                   static_cast<unsigned long>(i));
 465           gold_exit(false);
 466         }
 467
 468       const char* name = sym_names + st_name;
 469
 470       // A symbol defined in a section which we are not including must
 471       // be treated as an undefined symbol.
 472       unsigned char symbuf[sym_size];
 473       elfcpp::Sym<size, big_endian> sym2(symbuf);
 474       unsigned int st_shndx = psym->get_st_shndx();
 475       if (st_shndx != elfcpp::SHN_UNDEF
 476           && st_shndx < elfcpp::SHN_LORESERVE
 477           && !relobj->is_section_included(st_shndx))
 478         {
 479           memcpy(symbuf, p, sym_size);
 480           elfcpp::Sym_write<size, big_endian> sw(symbuf);
 481           sw.put_st_shndx(elfcpp::SHN_UNDEF);
 482           psym = &sym2;
 483         }
 484
 485       // In an object file, an '@' in the name separates the symbol
 486       // name from the version name.  If there are two '@' characters,
 487       // this is the default version.
 488       const char* ver = strchr(name, '@');
 489
 490       Symbol* res;
 491       if (ver == NULL)
 492         {
 493           Stringpool::Key name_key;
 494           name = this->namepool_.add(name, &name_key);
 495           res = this->add_from_object(relobj, name, name_key, NULL, 0,
 496                                       false, *psym);
 497         }
 498       else
 499         {
 500           Stringpool::Key name_key;
 501           name = this->namepool_.add(name, ver - name, &name_key);
 502
 503           bool def = false;
 504           ++ver;
 505           if (*ver == '@')
 506             {
 507               def = true;
 508               ++ver;
 509             }
 510
 511           Stringpool::Key ver_key;
 512           ver = this->namepool_.add(ver, &ver_key);
 513
 514           res = this->add_from_object(relobj, name, name_key, ver, ver_key,
 515                                       def, *psym);
 516         }
 517
 518       *sympointers++ = res;
 519     }
 520 }
 521
 522 // Add all the symbols in a dynamic object to the hash table.
 523
 524 template<int size, bool big_endian>
 525 void
 526 Symbol_table::add_from_dynobj(
 527     Sized_dynobj<size, big_endian>* dynobj,
 528     const unsigned char* syms,
 529     size_t count,
 530     const char* sym_names,
 531     size_t sym_name_size,
 532     const unsigned char* versym,
 533     size_t versym_size,
 534     const std::vector<const char*>* version_map)
 535 {
 536   // We take the size from the first object we see.
 537   if (this->get_size() == 0)
 538     this->set_size(size);
 539
 540   if (size != this->get_size() || size != dynobj->target()->get_size())
 541     {
 542       fprintf(stderr, _("%s: %s: mixing 32-bit and 64-bit ELF objects\n"),
 543               program_name, dynobj->name().c_str());
 544       gold_exit(false);
 545     }
 546
 547   if (versym != NULL && versym_size / 2 < count)
 548     {
 549       fprintf(stderr, _("%s: %s: too few symbol versions\n"),
 550               program_name, dynobj->name().c_str());
 551       gold_exit(false);
 552     }
 553
 554   const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
 555
 556   const unsigned char* p = syms;
 557   const unsigned char* vs = versym;
 558   for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
 559     {
 560       elfcpp::Sym<size, big_endian> sym(p);
 561
 562       // Ignore symbols with local binding.
 563       if (sym.get_st_bind() == elfcpp::STB_LOCAL)
 564         continue;
 565
 566       unsigned int st_name = sym.get_st_name();
 567       if (st_name >= sym_name_size)
 568         {
 569           fprintf(stderr, _("%s: %s: bad symbol name offset %u at %lu\n"),
 570                   program_name, dynobj->name().c_str(), st_name,
 571                   static_cast<unsigned long>(i));
 572           gold_exit(false);
 573         }
 574
 575       const char* name = sym_names + st_name;
 576
 577       if (versym == NULL)
 578         {
 579           Stringpool::Key name_key;
 580           name = this->namepool_.add(name, &name_key);
 581           this->add_from_object(dynobj, name, name_key, NULL, 0,
 582                                 false, sym);
 583           continue;
 584         }
 585
 586       // Read the version information.
 587
 588       unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
 589
 590       bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
 591       v &= elfcpp::VERSYM_VERSION;
 592
 593       if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL))
 594         {
 595           // This symbol should not be visible outside the object.
 596           continue;
 597         }
 598
 599       // At this point we are definitely going to add this symbol.
 600       Stringpool::Key name_key;
 601       name = this->namepool_.add(name, &name_key);
 602
 603       if (v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
 604         {
 605           // This symbol does not have a version.
 606           this->add_from_object(dynobj, name, name_key, NULL, 0, false, sym);
 607           continue;
 608         }
 609
 610       if (v >= version_map->size())
 611         {
 612           fprintf(stderr,
 613                   _("%s: %s: versym for symbol %zu out of range: %u\n"),
 614                   program_name, dynobj->name().c_str(), i, v);
 615           gold_exit(false);
 616         }
 617
 618       const char* version = (*version_map)[v];
 619       if (version == NULL)
 620         {
 621           fprintf(stderr, _("%s: %s: versym for symbol %zu has no name: %u\n"),
 622                   program_name, dynobj->name().c_str(), i, v);
 623           gold_exit(false);
 624         }
 625
 626       Stringpool::Key version_key;
 627       version = this->namepool_.add(version, &version_key);
 628
 629       // If this is an absolute symbol, and the version name and
 630       // symbol name are the same, then this is the version definition
 631       // symbol.  These symbols exist to support using -u to pull in
 632       // particular versions.  We do not want to record a version for
 633       // them.
 634       if (sym.get_st_shndx() == elfcpp::SHN_ABS && name_key == version_key)
 635         {
 636           this->add_from_object(dynobj, name, name_key, NULL, 0, false, sym);
 637           continue;
 638         }
 639
 640       const bool def = !hidden && sym.get_st_shndx() != elfcpp::SHN_UNDEF;
 641
 642       this->add_from_object(dynobj, name, name_key, version, version_key,
 643                             def, sym);
 644     }
 645 }
 646
 647 // Create and return a specially defined symbol.  If ONLY_IF_REF is
 648 // true, then only create the symbol if there is a reference to it.
 649
 650 template<int size, bool big_endian>
 651 Sized_symbol<size>*
 652 Symbol_table::define_special_symbol(Target* target, const char* name,
 653                                     bool only_if_ref
 654                                     ACCEPT_SIZE_ENDIAN)
 655 {
 656   gold_assert(this->size_ == size);
 657
 658   Symbol* oldsym;
 659   Sized_symbol<size>* sym;
 660
 661   if (only_if_ref)
 662     {
 663       oldsym = this->lookup(name, NULL);
 664       if (oldsym == NULL || !oldsym->is_undefined())
 665         return NULL;
 666       sym = NULL;
 667
 668       // Canonicalize NAME.
 669       name = oldsym->name();
 670     }
 671   else
 672     {
 673       // Canonicalize NAME.
 674       Stringpool::Key name_key;
 675       name = this->namepool_.add(name, &name_key);
 676
 677       Symbol* const snull = NULL;
 678       const Stringpool::Key ver_key = 0;
 679       std::pair<typename Symbol_table_type::iterator, bool> ins =
 680         this->table_.insert(std::make_pair(std::make_pair(name_key, ver_key),
 681                                            snull));
 682
 683       if (!ins.second)
 684         {
 685           // We already have a symbol table entry for NAME.
 686           oldsym = ins.first->second;
 687           gold_assert(oldsym != NULL);
 688           sym = NULL;
 689         }
 690       else
 691         {
 692           // We haven't seen this symbol before.
 693           gold_assert(ins.first->second == NULL);
 694
 695           if (!target->has_make_symbol())
 696             sym = new Sized_symbol<size>();
 697           else
 698             {
 699               gold_assert(target->get_size() == size);
 700               gold_assert(target->is_big_endian() ? big_endian : !big_endian);
 701               typedef Sized_target<size, big_endian> My_target;
 702               My_target* sized_target = static_cast<My_target*>(target);
 703               sym = sized_target->make_symbol();
 704               if (sym == NULL)
 705                 return NULL;
 706             }
 707
 708           ins.first->second = sym;
 709           oldsym = NULL;
 710         }
 711     }
 712
 713   if (oldsym != NULL)
 714     {
 715       gold_assert(sym == NULL);
 716
 717       sym = this->get_sized_symbol SELECT_SIZE_NAME(size) (oldsym
 718                                                            SELECT_SIZE(size));
 719       gold_assert(sym->source() == Symbol::FROM_OBJECT);
 720       const int old_shnum = sym->shnum();
 721       if (old_shnum != elfcpp::SHN_UNDEF
 722           && old_shnum != elfcpp::SHN_COMMON
 723           && !sym->object()->is_dynamic())
 724         {
 725           fprintf(stderr, "%s: linker defined: multiple definition of %s\n",
 726                   program_name, name);
 727           // FIXME: Report old location.  Record that we have seen an
 728           // error.
 729           return NULL;
 730         }
 731
 732       // Our new definition is going to override the old reference.
 733     }
 734
 735   return sym;
 736 }
 737
 738 // Define a symbol based on an Output_data.
 739
 740 void
 741 Symbol_table::define_in_output_data(Target* target, const char* name,
 742                                     Output_data* od,
 743                                     uint64_t value, uint64_t symsize,
 744                                     elfcpp::STT type, elfcpp::STB binding,
 745                                     elfcpp::STV visibility,
 746                                     unsigned char nonvis,
 747                                     bool offset_is_from_end,
 748                                     bool only_if_ref)
 749 {
 750   gold_assert(target->get_size() == this->size_);
 751   if (this->size_ == 32)
 752     this->do_define_in_output_data<32>(target, name, od, value, symsize,
 753                                        type, binding, visibility, nonvis,
 754                                        offset_is_from_end, only_if_ref);
 755   else if (this->size_ == 64)
 756     this->do_define_in_output_data<64>(target, name, od, value, symsize,
 757                                        type, binding, visibility, nonvis,
 758                                        offset_is_from_end, only_if_ref);
 759   else
 760     gold_unreachable();
 761 }
 762
 763 // Define a symbol in an Output_data, sized version.
 764
 765 template<int size>
 766 void
 767 Symbol_table::do_define_in_output_data(
 768     Target* target,
 769     const char* name,
 770     Output_data* od,
 771     typename elfcpp::Elf_types<size>::Elf_Addr value,
 772     typename elfcpp::Elf_types<size>::Elf_WXword symsize,
 773     elfcpp::STT type,
 774     elfcpp::STB binding,
 775     elfcpp::STV visibility,
 776     unsigned char nonvis,
 777     bool offset_is_from_end,
 778     bool only_if_ref)
 779 {
 780   Sized_symbol<size>* sym;
 781
 782   if (target->is_big_endian())
 783     sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) (
 784         target, name, only_if_ref
 785         SELECT_SIZE_ENDIAN(size, true));
 786   else
 787     sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) (
 788         target, name, only_if_ref
 789         SELECT_SIZE_ENDIAN(size, false));
 790
 791   if (sym == NULL)
 792     return;
 793
 794   sym->init(name, od, value, symsize, type, binding, visibility, nonvis,
 795             offset_is_from_end);
 796 }
 797
 798 // Define a symbol based on an Output_segment.
 799
 800 void
 801 Symbol_table::define_in_output_segment(Target* target, const char* name,
 802                                        Output_segment* os,
 803                                        uint64_t value, uint64_t symsize,
 804                                        elfcpp::STT type, elfcpp::STB binding,
 805                                        elfcpp::STV visibility,
 806                                        unsigned char nonvis,
 807                                        Symbol::Segment_offset_base offset_base,
 808                                        bool only_if_ref)
 809 {
 810   gold_assert(target->get_size() == this->size_);
 811   if (this->size_ == 32)
 812     this->do_define_in_output_segment<32>(target, name, os, value, symsize,
 813                                           type, binding, visibility, nonvis,
 814                                           offset_base, only_if_ref);
 815   else if (this->size_ == 64)
 816     this->do_define_in_output_segment<64>(target, name, os, value, symsize,
 817                                           type, binding, visibility, nonvis,
 818                                           offset_base, only_if_ref);
 819   else
 820     gold_unreachable();
 821 }
 822
 823 // Define a symbol in an Output_segment, sized version.
 824
 825 template<int size>
 826 void
 827 Symbol_table::do_define_in_output_segment(
 828     Target* target,
 829     const char* name,
 830     Output_segment* os,
 831     typename elfcpp::Elf_types<size>::Elf_Addr value,
 832     typename elfcpp::Elf_types<size>::Elf_WXword symsize,
 833     elfcpp::STT type,
 834     elfcpp::STB binding,
 835     elfcpp::STV visibility,
 836     unsigned char nonvis,
 837     Symbol::Segment_offset_base offset_base,
 838     bool only_if_ref)
 839 {
 840   Sized_symbol<size>* sym;
 841
 842   if (target->is_big_endian())
 843     sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) (
 844         target, name, only_if_ref
 845         SELECT_SIZE_ENDIAN(size, true));
 846   else
 847     sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) (
 848         target, name, only_if_ref
 849         SELECT_SIZE_ENDIAN(size, false));
 850
 851   if (sym == NULL)
 852     return;
 853
 854   sym->init(name, os, value, symsize, type, binding, visibility, nonvis,
 855             offset_base);
 856 }
 857
 858 // Define a special symbol with a constant value.  It is a multiple
 859 // definition error if this symbol is already defined.
 860
 861 void
 862 Symbol_table::define_as_constant(Target* target, const char* name,
 863                                  uint64_t value, uint64_t symsize,
 864                                  elfcpp::STT type, elfcpp::STB binding,
 865                                  elfcpp::STV visibility, unsigned char nonvis,
 866                                  bool only_if_ref)
 867 {
 868   gold_assert(target->get_size() == this->size_);
 869   if (this->size_ == 32)
 870     this->do_define_as_constant<32>(target, name, value, symsize,
 871                                     type, binding, visibility, nonvis,
 872                                     only_if_ref);
 873   else if (this->size_ == 64)
 874     this->do_define_as_constant<64>(target, name, value, symsize,
 875                                     type, binding, visibility, nonvis,
 876                                     only_if_ref);
 877   else
 878     gold_unreachable();
 879 }
 880
 881 // Define a symbol as a constant, sized version.
 882
 883 template<int size>
 884 void
 885 Symbol_table::do_define_as_constant(
 886     Target* target,
 887     const char* name,
 888     typename elfcpp::Elf_types<size>::Elf_Addr value,
 889     typename elfcpp::Elf_types<size>::Elf_WXword symsize,
 890     elfcpp::STT type,
 891     elfcpp::STB binding,
 892     elfcpp::STV visibility,
 893     unsigned char nonvis,
 894     bool only_if_ref)
 895 {
 896   Sized_symbol<size>* sym;
 897
 898   if (target->is_big_endian())
 899     sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) (
 900         target, name, only_if_ref
 901         SELECT_SIZE_ENDIAN(size, true));
 902   else
 903     sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) (
 904         target, name, only_if_ref
 905         SELECT_SIZE_ENDIAN(size, false));
 906
 907   if (sym == NULL)
 908     return;
 909
 910   sym->init(name, value, symsize, type, binding, visibility, nonvis);
 911 }
 912
 913 // Define a set of symbols in output sections.
 914
 915 void
 916 Symbol_table::define_symbols(const Layout* layout, Target* target, int count,
 917                              const Define_symbol_in_section* p)
 918 {
 919   for (int i = 0; i < count; ++i, ++p)
 920     {
 921       Output_section* os = layout->find_output_section(p->output_section);
 922       if (os != NULL)
 923         this->define_in_output_data(target, p->name, os, p->value, p->size,
 924                                     p->type, p->binding, p->visibility,
 925                                     p->nonvis, p->offset_is_from_end,
 926                                     p->only_if_ref);
 927       else
 928         this->define_as_constant(target, p->name, 0, p->size, p->type,
 929                                  p->binding, p->visibility, p->nonvis,
 930                                  p->only_if_ref);
 931     }
 932 }
 933
 934 // Define a set of symbols in output segments.
 935
 936 void
 937 Symbol_table::define_symbols(const Layout* layout, Target* target, int count,
 938                              const Define_symbol_in_segment* p)
 939 {
 940   for (int i = 0; i < count; ++i, ++p)
 941     {
 942       Output_segment* os = layout->find_output_segment(p->segment_type,
 943                                                        p->segment_flags_set,
 944                                                        p->segment_flags_clear);
 945       if (os != NULL)
 946         this->define_in_output_segment(target, p->name, os, p->value, p->size,
 947                                        p->type, p->binding, p->visibility,
 948                                        p->nonvis, p->offset_base,
 949                                        p->only_if_ref);
 950       else
 951         this->define_as_constant(target, p->name, 0, p->size, p->type,
 952                                  p->binding, p->visibility, p->nonvis,
 953                                  p->only_if_ref);
 954     }
 955 }
 956
 957 // Set the dynamic symbol indexes.  INDEX is the index of the first
 958 // global dynamic symbol.  Pointers to the symbols are stored into the
 959 // vector SYMS.  The names are added to DYNPOOL.  This returns an
 960 // updated dynamic symbol index.
 961
 962 unsigned int
 963 Symbol_table::set_dynsym_indexes(unsigned int index,
 964                                  std::vector<Symbol*>* syms,
 965                                  Stringpool* dynpool)
 966 {
 967   for (Symbol_table_type::iterator p = this->table_.begin();
 968        p != this->table_.end();
 969        ++p)
 970     {
 971       Symbol* sym = p->second;
 972       if (sym->needs_dynsym_entry())
 973         {
 974           sym->set_dynsym_index(index);
 975           ++index;
 976           syms->push_back(sym);
 977           dynpool->add(sym->name(), NULL);
 978         }
 979     }
 980
 981   return index;
 982 }
 983
 984 // Set the final values for all the symbols.  The index of the first
 985 // global symbol in the output file is INDEX.  Record the file offset
 986 // OFF.  Add their names to POOL.  Return the new file offset.
 987
 988 off_t
 989 Symbol_table::finalize(unsigned int index, off_t off, Stringpool* pool)
 990 {
 991   off_t ret;
 992
 993   gold_assert(index != 0);
 994   this->first_global_index_ = index;
 995
 996   if (this->size_ == 32)
 997     ret = this->sized_finalize<32>(index, off, pool);
 998   else if (this->size_ == 64)
 999     ret = this->sized_finalize<64>(index, off, pool);
1000   else
1001     gold_unreachable();
1002
1003   // Now that we have the final symbol table, we can reliably note
1004   // which symbols should get warnings.
1005   this->warnings_.note_warnings(this);
1006
1007   return ret;
1008 }
1009
1010 // Set the final value for all the symbols.  This is called after
1011 // Layout::finalize, so all the output sections have their final
1012 // address.
1013
1014 template<int size>
1015 off_t
1016 Symbol_table::sized_finalize(unsigned index, off_t off, Stringpool* pool)
1017 {
1018   off = align_address(off, size >> 3);
1019   this->offset_ = off;
1020
1021   size_t orig_index = index;
1022
1023   const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1024   for (Symbol_table_type::iterator p = this->table_.begin();
1025        p != this->table_.end();
1026        ++p)
1027     {
1028       Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
1029
1030       // FIXME: Here we need to decide which symbols should go into
1031       // the output file, based on --strip.
1032
1033       // The default version of a symbol may appear twice in the
1034       // symbol table.  We only need to finalize it once.
1035       if (sym->has_symtab_index())
1036         continue;
1037
1038       typename Sized_symbol<size>::Value_type value;
1039
1040       switch (sym->source())
1041         {
1042         case Symbol::FROM_OBJECT:
1043           {
1044             unsigned int shnum = sym->shnum();
1045
1046             // FIXME: We need some target specific support here.
1047             if (shnum >= elfcpp::SHN_LORESERVE
1048                 && shnum != elfcpp::SHN_ABS)
1049               {
1050                 fprintf(stderr, _("%s: %s: unsupported symbol section 0x%x\n"),
1051                         program_name, sym->name(), shnum);
1052                 gold_exit(false);
1053               }
1054
1055             Object* symobj = sym->object();
1056             if (symobj->is_dynamic())
1057               {
1058                 value = 0;
1059                 shnum = elfcpp::SHN_UNDEF;
1060               }
1061             else if (shnum == elfcpp::SHN_UNDEF)
1062               value = 0;
1063             else if (shnum == elfcpp::SHN_ABS)
1064               value = sym->value();
1065             else
1066               {
1067                 Relobj* relobj = static_cast<Relobj*>(symobj);
1068                 off_t secoff;
1069                 Output_section* os = relobj->output_section(shnum, &secoff);
1070
1071                 if (os == NULL)
1072                   {
1073                     sym->set_symtab_index(-1U);
1074                     continue;
1075                   }
1076
1077                 value = sym->value() + os->address() + secoff;
1078               }
1079           }
1080           break;
1081
1082         case Symbol::IN_OUTPUT_DATA:
1083           {
1084             Output_data* od = sym->output_data();
1085             value = sym->value() + od->address();
1086             if (sym->offset_is_from_end())
1087               value += od->data_size();
1088           }
1089           break;
1090
1091         case Symbol::IN_OUTPUT_SEGMENT:
1092           {
1093             Output_segment* os = sym->output_segment();
1094             value = sym->value() + os->vaddr();
1095             switch (sym->offset_base())
1096               {
1097               case Symbol::SEGMENT_START:
1098                 break;
1099               case Symbol::SEGMENT_END:
1100                 value += os->memsz();
1101                 break;
1102               case Symbol::SEGMENT_BSS:
1103                 value += os->filesz();
1104                 break;
1105               default:
1106                 gold_unreachable();
1107               }
1108           }
1109           break;
1110
1111         case Symbol::CONSTANT:
1112           value = sym->value();
1113           break;
1114
1115         default:
1116           gold_unreachable();
1117         }
1118
1119       sym->set_value(value);
1120       sym->set_symtab_index(index);
1121       pool->add(sym->name(), NULL);
1122       ++index;
1123       off += sym_size;
1124     }
1125
1126   this->output_count_ = index - orig_index;
1127
1128   return off;
1129 }
1130
1131 // Write out the global symbols.
1132
1133 void
1134 Symbol_table::write_globals(const Target* target, const Stringpool* sympool,
1135                             Output_file* of) const
1136 {
1137   if (this->size_ == 32)
1138     {
1139       if (target->is_big_endian())
1140         this->sized_write_globals<32, true>(target, sympool, of);
1141       else
1142         this->sized_write_globals<32, false>(target, sympool, of);
1143     }
1144   else if (this->size_ == 64)
1145     {
1146       if (target->is_big_endian())
1147         this->sized_write_globals<64, true>(target, sympool, of);
1148       else
1149         this->sized_write_globals<64, false>(target, sympool, of);
1150     }
1151   else
1152     gold_unreachable();
1153 }
1154
1155 // Write out the global symbols.
1156
1157 template<int size, bool big_endian>
1158 void
1159 Symbol_table::sized_write_globals(const Target*,
1160                                   const Stringpool* sympool,
1161                                   Output_file* of) const
1162 {
1163   const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1164   unsigned int index = this->first_global_index_;
1165   const off_t oview_size = this->output_count_ * sym_size;
1166   unsigned char* psyms = of->get_output_view(this->offset_, oview_size);
1167
1168   unsigned char* ps = psyms;
1169   for (Symbol_table_type::const_iterator p = this->table_.begin();
1170        p != this->table_.end();
1171        ++p)
1172     {
1173       Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
1174
1175       unsigned int sym_index = sym->symtab_index();
1176       if (sym_index == -1U)
1177         {
1178           // This symbol is not included in the output file.
1179           continue;
1180         }
1181       if (sym_index != index)
1182         {
1183           // We have already seen this symbol, because it has a
1184           // default version.
1185           gold_assert(sym_index < index);
1186           continue;
1187         }
1188       ++index;
1189
1190       unsigned int shndx;
1191       switch (sym->source())
1192         {
1193         case Symbol::FROM_OBJECT:
1194           {
1195             unsigned int shnum = sym->shnum();
1196
1197             // FIXME: We need some target specific support here.
1198             if (shnum >= elfcpp::SHN_LORESERVE
1199                 && shnum != elfcpp::SHN_ABS)
1200               {
1201                 fprintf(stderr, _("%s: %s: unsupported symbol section 0x%x\n"),
1202                         program_name, sym->name(), sym->shnum());
1203                 gold_exit(false);
1204               }
1205
1206             Object* symobj = sym->object();
1207             if (symobj->is_dynamic())
1208               {
1209                 // FIXME.
1210                 shndx = elfcpp::SHN_UNDEF;
1211               }
1212             else if (shnum == elfcpp::SHN_UNDEF || shnum == elfcpp::SHN_ABS)
1213               shndx = shnum;
1214             else
1215               {
1216                 Relobj* relobj = static_cast<Relobj*>(symobj);
1217                 off_t secoff;
1218                 Output_section* os = relobj->output_section(shnum, &secoff);
1219                 gold_assert(os != NULL);
1220                 shndx = os->out_shndx();
1221               }
1222           }
1223           break;
1224
1225         case Symbol::IN_OUTPUT_DATA:
1226           shndx = sym->output_data()->out_shndx();
1227           break;
1228
1229         case Symbol::IN_OUTPUT_SEGMENT:
1230           shndx = elfcpp::SHN_ABS;
1231           break;
1232
1233         case Symbol::CONSTANT:
1234           shndx = elfcpp::SHN_ABS;
1235           break;
1236
1237         default:
1238           gold_unreachable();
1239         }
1240
1241       elfcpp::Sym_write<size, big_endian> osym(ps);
1242       osym.put_st_name(sympool->get_offset(sym->name()));
1243       osym.put_st_value(sym->value());
1244       osym.put_st_size(sym->symsize());
1245       osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type()));
1246       osym.put_st_other(elfcpp::elf_st_other(sym->visibility(),
1247                                              sym->nonvis()));
1248       osym.put_st_shndx(shndx);
1249
1250       ps += sym_size;
1251     }
1252
1253   gold_assert(ps - psyms == oview_size);
1254
1255   of->write_output_view(this->offset_, oview_size, psyms);
1256 }
1257
1258 // Write out a section symbol.  Return the update offset.
1259
1260 void
1261 Symbol_table::write_section_symbol(const Target* target,
1262                                    const Output_section *os,
1263                                    Output_file* of,
1264                                    off_t offset) const
1265 {
1266   if (this->size_ == 32)
1267     {
1268       if (target->is_big_endian())
1269         this->sized_write_section_symbol<32, true>(os, of, offset);
1270       else
1271         this->sized_write_section_symbol<32, false>(os, of, offset);
1272     }
1273   else if (this->size_ == 64)
1274     {
1275       if (target->is_big_endian())
1276         this->sized_write_section_symbol<64, true>(os, of, offset);
1277       else
1278         this->sized_write_section_symbol<64, false>(os, of, offset);
1279     }
1280   else
1281     gold_unreachable();
1282 }
1283
1284 // Write out a section symbol, specialized for size and endianness.
1285
1286 template<int size, bool big_endian>
1287 void
1288 Symbol_table::sized_write_section_symbol(const Output_section* os,
1289                                          Output_file* of,
1290                                          off_t offset) const
1291 {
1292   const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1293
1294   unsigned char* pov = of->get_output_view(offset, sym_size);
1295
1296   elfcpp::Sym_write<size, big_endian> osym(pov);
1297   osym.put_st_name(0);
1298   osym.put_st_value(os->address());
1299   osym.put_st_size(0);
1300   osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
1301                                        elfcpp::STT_SECTION));
1302   osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
1303   osym.put_st_shndx(os->out_shndx());
1304
1305   of->write_output_view(offset, sym_size, pov);
1306 }
1307
1308 // Warnings functions.
1309
1310 // Add a new warning.
1311
1312 void
1313 Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
1314                       unsigned int shndx)
1315 {
1316   name = symtab->canonicalize_name(name);
1317   this->warnings_[name].set(obj, shndx);
1318 }
1319
1320 // Look through the warnings and mark the symbols for which we should
1321 // warn.  This is called during Layout::finalize when we know the
1322 // sources for all the symbols.
1323
1324 void
1325 Warnings::note_warnings(Symbol_table* symtab)
1326 {
1327   for (Warning_table::iterator p = this->warnings_.begin();
1328        p != this->warnings_.end();
1329        ++p)
1330     {
1331       Symbol* sym = symtab->lookup(p->first, NULL);
1332       if (sym != NULL
1333           && sym->source() == Symbol::FROM_OBJECT
1334           && sym->object() == p->second.object)
1335         {
1336           sym->set_has_warning();
1337
1338           // Read the section contents to get the warning text.  It
1339           // would be nicer if we only did this if we have to actually
1340           // issue a warning.  Unfortunately, warnings are issued as
1341           // we relocate sections.  That means that we can not lock
1342           // the object then, as we might try to issue the same
1343           // warning multiple times simultaneously.
1344           {
1345             Task_locker_obj<Object> tl(*p->second.object);
1346             const unsigned char* c;
1347             off_t len;
1348             c = p->second.object->section_contents(p->second.shndx, &len);
1349             p->second.set_text(reinterpret_cast<const char*>(c), len);
1350           }
1351         }
1352     }
1353 }
1354
1355 // Issue a warning.  This is called when we see a relocation against a
1356 // symbol for which has a warning.
1357
1358 void
1359 Warnings::issue_warning(const Symbol* sym, const std::string& location) const
1360 {
1361   gold_assert(sym->has_warning());
1362   Warning_table::const_iterator p = this->warnings_.find(sym->name());
1363   gold_assert(p != this->warnings_.end());
1364   fprintf(stderr, _("%s: %s: warning: %s\n"), program_name, location.c_str(),
1365           p->second.text.c_str());
1366 }
1367
1368 // Instantiate the templates we need.  We could use the configure
1369 // script to restrict this to only the ones needed for implemented
1370 // targets.
1371
1372 template
1373 void
1374 Symbol_table::add_from_relobj<32, true>(
1375     Sized_relobj<32, true>* relobj,
1376     const unsigned char* syms,
1377     size_t count,
1378     const char* sym_names,
1379     size_t sym_name_size,
1380     Symbol** sympointers);
1381
1382 template
1383 void
1384 Symbol_table::add_from_relobj<32, false>(
1385     Sized_relobj<32, false>* relobj,
1386     const unsigned char* syms,
1387     size_t count,
1388     const char* sym_names,
1389     size_t sym_name_size,
1390     Symbol** sympointers);
1391
1392 template
1393 void
1394 Symbol_table::add_from_relobj<64, true>(
1395     Sized_relobj<64, true>* relobj,
1396     const unsigned char* syms,
1397     size_t count,
1398     const char* sym_names,
1399     size_t sym_name_size,
1400     Symbol** sympointers);
1401
1402 template
1403 void
1404 Symbol_table::add_from_relobj<64, false>(
1405     Sized_relobj<64, false>* relobj,
1406     const unsigned char* syms,
1407     size_t count,
1408     const char* sym_names,
1409     size_t sym_name_size,
1410     Symbol** sympointers);
1411
1412 template
1413 void
1414 Symbol_table::add_from_dynobj<32, true>(
1415     Sized_dynobj<32, true>* dynobj,
1416     const unsigned char* syms,
1417     size_t count,
1418     const char* sym_names,
1419     size_t sym_name_size,
1420     const unsigned char* versym,
1421     size_t versym_size,
1422     const std::vector<const char*>* version_map);
1423
1424 template
1425 void
1426 Symbol_table::add_from_dynobj<32, false>(
1427     Sized_dynobj<32, false>* dynobj,
1428     const unsigned char* syms,
1429     size_t count,
1430     const char* sym_names,
1431     size_t sym_name_size,
1432     const unsigned char* versym,
1433     size_t versym_size,
1434     const std::vector<const char*>* version_map);
1435
1436 template
1437 void
1438 Symbol_table::add_from_dynobj<64, true>(
1439     Sized_dynobj<64, true>* dynobj,
1440     const unsigned char* syms,
1441     size_t count,
1442     const char* sym_names,
1443     size_t sym_name_size,
1444     const unsigned char* versym,
1445     size_t versym_size,
1446     const std::vector<const char*>* version_map);
1447
1448 template
1449 void
1450 Symbol_table::add_from_dynobj<64, false>(
1451     Sized_dynobj<64, false>* dynobj,
1452     const unsigned char* syms,
1453     size_t count,
1454     const char* sym_names,
1455     size_t sym_name_size,
1456     const unsigned char* versym,
1457     size_t versym_size,
1458     const std::vector<const char*>* version_map);
1459
1460 } // End namespace gold.