| 1 | // symtab.cc -- the gold symbol table |
| 2 | |
| 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
| 4 | // Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | // This file is part of gold. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or modify |
| 9 | // it under the terms of the GNU General Public License as published by |
| 10 | // the Free Software Foundation; either version 3 of the License, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | #include "gold.h" |
| 24 | |
| 25 | #include <stdint.h> |
| 26 | #include <set> |
| 27 | #include <string> |
| 28 | #include <utility> |
| 29 | #include "demangle.h" |
| 30 | |
| 31 | #include "object.h" |
| 32 | #include "dwarf_reader.h" |
| 33 | #include "dynobj.h" |
| 34 | #include "output.h" |
| 35 | #include "target.h" |
| 36 | #include "workqueue.h" |
| 37 | #include "symtab.h" |
| 38 | |
| 39 | namespace gold |
| 40 | { |
| 41 | |
| 42 | // Class Symbol. |
| 43 | |
| 44 | // Initialize fields in Symbol. This initializes everything except u_ |
| 45 | // and source_. |
| 46 | |
| 47 | void |
| 48 | Symbol::init_fields(const char* name, const char* version, |
| 49 | elfcpp::STT type, elfcpp::STB binding, |
| 50 | elfcpp::STV visibility, unsigned char nonvis) |
| 51 | { |
| 52 | this->name_ = name; |
| 53 | this->version_ = version; |
| 54 | this->symtab_index_ = 0; |
| 55 | this->dynsym_index_ = 0; |
| 56 | this->got_offset_ = 0; |
| 57 | this->plt_offset_ = 0; |
| 58 | this->type_ = type; |
| 59 | this->binding_ = binding; |
| 60 | this->visibility_ = visibility; |
| 61 | this->nonvis_ = nonvis; |
| 62 | this->is_target_special_ = false; |
| 63 | this->is_def_ = false; |
| 64 | this->is_forwarder_ = false; |
| 65 | this->has_alias_ = false; |
| 66 | this->needs_dynsym_entry_ = false; |
| 67 | this->in_reg_ = false; |
| 68 | this->in_dyn_ = false; |
| 69 | this->has_got_offset_ = false; |
| 70 | this->has_plt_offset_ = false; |
| 71 | this->has_warning_ = false; |
| 72 | this->is_copied_from_dynobj_ = false; |
| 73 | this->is_forced_local_ = false; |
| 74 | } |
| 75 | |
| 76 | // Return the demangled version of the symbol's name, but only |
| 77 | // if the --demangle flag was set. |
| 78 | |
| 79 | static std::string |
| 80 | demangle(const char* name) |
| 81 | { |
| 82 | if (!parameters->demangle()) |
| 83 | return name; |
| 84 | |
| 85 | // cplus_demangle allocates memory for the result it returns, |
| 86 | // and returns NULL if the name is already demangled. |
| 87 | char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS); |
| 88 | if (demangled_name == NULL) |
| 89 | return name; |
| 90 | |
| 91 | std::string retval(demangled_name); |
| 92 | free(demangled_name); |
| 93 | return retval; |
| 94 | } |
| 95 | |
| 96 | std::string |
| 97 | Symbol::demangled_name() const |
| 98 | { |
| 99 | return demangle(this->name()); |
| 100 | } |
| 101 | |
| 102 | // Initialize the fields in the base class Symbol for SYM in OBJECT. |
| 103 | |
| 104 | template<int size, bool big_endian> |
| 105 | void |
| 106 | Symbol::init_base(const char* name, const char* version, Object* object, |
| 107 | const elfcpp::Sym<size, big_endian>& sym) |
| 108 | { |
| 109 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), |
| 110 | sym.get_st_visibility(), sym.get_st_nonvis()); |
| 111 | this->u_.from_object.object = object; |
| 112 | // FIXME: Handle SHN_XINDEX. |
| 113 | this->u_.from_object.shndx = sym.get_st_shndx(); |
| 114 | this->source_ = FROM_OBJECT; |
| 115 | this->in_reg_ = !object->is_dynamic(); |
| 116 | this->in_dyn_ = object->is_dynamic(); |
| 117 | } |
| 118 | |
| 119 | // Initialize the fields in the base class Symbol for a symbol defined |
| 120 | // in an Output_data. |
| 121 | |
| 122 | void |
| 123 | Symbol::init_base(const char* name, Output_data* od, elfcpp::STT type, |
| 124 | elfcpp::STB binding, elfcpp::STV visibility, |
| 125 | unsigned char nonvis, bool offset_is_from_end) |
| 126 | { |
| 127 | this->init_fields(name, NULL, type, binding, visibility, nonvis); |
| 128 | this->u_.in_output_data.output_data = od; |
| 129 | this->u_.in_output_data.offset_is_from_end = offset_is_from_end; |
| 130 | this->source_ = IN_OUTPUT_DATA; |
| 131 | this->in_reg_ = true; |
| 132 | } |
| 133 | |
| 134 | // Initialize the fields in the base class Symbol for a symbol defined |
| 135 | // in an Output_segment. |
| 136 | |
| 137 | void |
| 138 | Symbol::init_base(const char* name, Output_segment* os, elfcpp::STT type, |
| 139 | elfcpp::STB binding, elfcpp::STV visibility, |
| 140 | unsigned char nonvis, Segment_offset_base offset_base) |
| 141 | { |
| 142 | this->init_fields(name, NULL, type, binding, visibility, nonvis); |
| 143 | this->u_.in_output_segment.output_segment = os; |
| 144 | this->u_.in_output_segment.offset_base = offset_base; |
| 145 | this->source_ = IN_OUTPUT_SEGMENT; |
| 146 | this->in_reg_ = true; |
| 147 | } |
| 148 | |
| 149 | // Initialize the fields in the base class Symbol for a symbol defined |
| 150 | // as a constant. |
| 151 | |
| 152 | void |
| 153 | Symbol::init_base(const char* name, elfcpp::STT type, |
| 154 | elfcpp::STB binding, elfcpp::STV visibility, |
| 155 | unsigned char nonvis) |
| 156 | { |
| 157 | this->init_fields(name, NULL, type, binding, visibility, nonvis); |
| 158 | this->source_ = CONSTANT; |
| 159 | this->in_reg_ = true; |
| 160 | } |
| 161 | |
| 162 | // Allocate a common symbol in the base. |
| 163 | |
| 164 | void |
| 165 | Symbol::allocate_base_common(Output_data* od) |
| 166 | { |
| 167 | gold_assert(this->is_common()); |
| 168 | this->source_ = IN_OUTPUT_DATA; |
| 169 | this->u_.in_output_data.output_data = od; |
| 170 | this->u_.in_output_data.offset_is_from_end = false; |
| 171 | } |
| 172 | |
| 173 | // Initialize the fields in Sized_symbol for SYM in OBJECT. |
| 174 | |
| 175 | template<int size> |
| 176 | template<bool big_endian> |
| 177 | void |
| 178 | Sized_symbol<size>::init(const char* name, const char* version, Object* object, |
| 179 | const elfcpp::Sym<size, big_endian>& sym) |
| 180 | { |
| 181 | this->init_base(name, version, object, sym); |
| 182 | this->value_ = sym.get_st_value(); |
| 183 | this->symsize_ = sym.get_st_size(); |
| 184 | } |
| 185 | |
| 186 | // Initialize the fields in Sized_symbol for a symbol defined in an |
| 187 | // Output_data. |
| 188 | |
| 189 | template<int size> |
| 190 | void |
| 191 | Sized_symbol<size>::init(const char* name, Output_data* od, |
| 192 | Value_type value, Size_type symsize, |
| 193 | elfcpp::STT type, elfcpp::STB binding, |
| 194 | elfcpp::STV visibility, unsigned char nonvis, |
| 195 | bool offset_is_from_end) |
| 196 | { |
| 197 | this->init_base(name, od, type, binding, visibility, nonvis, |
| 198 | offset_is_from_end); |
| 199 | this->value_ = value; |
| 200 | this->symsize_ = symsize; |
| 201 | } |
| 202 | |
| 203 | // Initialize the fields in Sized_symbol for a symbol defined in an |
| 204 | // Output_segment. |
| 205 | |
| 206 | template<int size> |
| 207 | void |
| 208 | Sized_symbol<size>::init(const char* name, Output_segment* os, |
| 209 | Value_type value, Size_type symsize, |
| 210 | elfcpp::STT type, elfcpp::STB binding, |
| 211 | elfcpp::STV visibility, unsigned char nonvis, |
| 212 | Segment_offset_base offset_base) |
| 213 | { |
| 214 | this->init_base(name, os, type, binding, visibility, nonvis, offset_base); |
| 215 | this->value_ = value; |
| 216 | this->symsize_ = symsize; |
| 217 | } |
| 218 | |
| 219 | // Initialize the fields in Sized_symbol for a symbol defined as a |
| 220 | // constant. |
| 221 | |
| 222 | template<int size> |
| 223 | void |
| 224 | Sized_symbol<size>::init(const char* name, Value_type value, Size_type symsize, |
| 225 | elfcpp::STT type, elfcpp::STB binding, |
| 226 | elfcpp::STV visibility, unsigned char nonvis) |
| 227 | { |
| 228 | this->init_base(name, type, binding, visibility, nonvis); |
| 229 | this->value_ = value; |
| 230 | this->symsize_ = symsize; |
| 231 | } |
| 232 | |
| 233 | // Allocate a common symbol. |
| 234 | |
| 235 | template<int size> |
| 236 | void |
| 237 | Sized_symbol<size>::allocate_common(Output_data* od, Value_type value) |
| 238 | { |
| 239 | this->allocate_base_common(od); |
| 240 | this->value_ = value; |
| 241 | } |
| 242 | |
| 243 | // Return true if this symbol should be added to the dynamic symbol |
| 244 | // table. |
| 245 | |
| 246 | inline bool |
| 247 | Symbol::should_add_dynsym_entry() const |
| 248 | { |
| 249 | // If the symbol is used by a dynamic relocation, we need to add it. |
| 250 | if (this->needs_dynsym_entry()) |
| 251 | return true; |
| 252 | |
| 253 | // If the symbol was forced local in a version script, do not add it. |
| 254 | if (this->is_forced_local()) |
| 255 | return false; |
| 256 | |
| 257 | // If exporting all symbols or building a shared library, |
| 258 | // and the symbol is defined in a regular object and is |
| 259 | // externally visible, we need to add it. |
| 260 | if ((parameters->export_dynamic() || parameters->output_is_shared()) |
| 261 | && !this->is_from_dynobj() |
| 262 | && this->is_externally_visible()) |
| 263 | return true; |
| 264 | |
| 265 | return false; |
| 266 | } |
| 267 | |
| 268 | // Return true if the final value of this symbol is known at link |
| 269 | // time. |
| 270 | |
| 271 | bool |
| 272 | Symbol::final_value_is_known() const |
| 273 | { |
| 274 | // If we are not generating an executable, then no final values are |
| 275 | // known, since they will change at runtime. |
| 276 | if (!parameters->output_is_executable()) |
| 277 | return false; |
| 278 | |
| 279 | // If the symbol is not from an object file, then it is defined, and |
| 280 | // known. |
| 281 | if (this->source_ != FROM_OBJECT) |
| 282 | return true; |
| 283 | |
| 284 | // If the symbol is from a dynamic object, then the final value is |
| 285 | // not known. |
| 286 | if (this->object()->is_dynamic()) |
| 287 | return false; |
| 288 | |
| 289 | // If the symbol is not undefined (it is defined or common), then |
| 290 | // the final value is known. |
| 291 | if (!this->is_undefined()) |
| 292 | return true; |
| 293 | |
| 294 | // If the symbol is undefined, then whether the final value is known |
| 295 | // depends on whether we are doing a static link. If we are doing a |
| 296 | // dynamic link, then the final value could be filled in at runtime. |
| 297 | // This could reasonably be the case for a weak undefined symbol. |
| 298 | return parameters->doing_static_link(); |
| 299 | } |
| 300 | |
| 301 | // Return whether the symbol has an absolute value. |
| 302 | |
| 303 | bool |
| 304 | Symbol::value_is_absolute() const |
| 305 | { |
| 306 | switch (this->source_) |
| 307 | { |
| 308 | case FROM_OBJECT: |
| 309 | return this->u_.from_object.shndx == elfcpp::SHN_ABS; |
| 310 | case IN_OUTPUT_DATA: |
| 311 | case IN_OUTPUT_SEGMENT: |
| 312 | return false; |
| 313 | case CONSTANT: |
| 314 | return true; |
| 315 | default: |
| 316 | gold_unreachable(); |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | // Class Symbol_table. |
| 321 | |
| 322 | Symbol_table::Symbol_table(unsigned int count, |
| 323 | const Version_script_info& version_script) |
| 324 | : saw_undefined_(0), offset_(0), table_(count), namepool_(), |
| 325 | forwarders_(), commons_(), forced_locals_(), warnings_(), |
| 326 | version_script_(version_script) |
| 327 | { |
| 328 | namepool_.reserve(count); |
| 329 | } |
| 330 | |
| 331 | Symbol_table::~Symbol_table() |
| 332 | { |
| 333 | } |
| 334 | |
| 335 | // The hash function. The key values are Stringpool keys. |
| 336 | |
| 337 | inline size_t |
| 338 | Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const |
| 339 | { |
| 340 | return key.first ^ key.second; |
| 341 | } |
| 342 | |
| 343 | // The symbol table key equality function. This is called with |
| 344 | // Stringpool keys. |
| 345 | |
| 346 | inline bool |
| 347 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, |
| 348 | const Symbol_table_key& k2) const |
| 349 | { |
| 350 | return k1.first == k2.first && k1.second == k2.second; |
| 351 | } |
| 352 | |
| 353 | // Make TO a symbol which forwards to FROM. |
| 354 | |
| 355 | void |
| 356 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) |
| 357 | { |
| 358 | gold_assert(from != to); |
| 359 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); |
| 360 | this->forwarders_[from] = to; |
| 361 | from->set_forwarder(); |
| 362 | } |
| 363 | |
| 364 | // Resolve the forwards from FROM, returning the real symbol. |
| 365 | |
| 366 | Symbol* |
| 367 | Symbol_table::resolve_forwards(const Symbol* from) const |
| 368 | { |
| 369 | gold_assert(from->is_forwarder()); |
| 370 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
| 371 | this->forwarders_.find(from); |
| 372 | gold_assert(p != this->forwarders_.end()); |
| 373 | return p->second; |
| 374 | } |
| 375 | |
| 376 | // Look up a symbol by name. |
| 377 | |
| 378 | Symbol* |
| 379 | Symbol_table::lookup(const char* name, const char* version) const |
| 380 | { |
| 381 | Stringpool::Key name_key; |
| 382 | name = this->namepool_.find(name, &name_key); |
| 383 | if (name == NULL) |
| 384 | return NULL; |
| 385 | |
| 386 | Stringpool::Key version_key = 0; |
| 387 | if (version != NULL) |
| 388 | { |
| 389 | version = this->namepool_.find(version, &version_key); |
| 390 | if (version == NULL) |
| 391 | return NULL; |
| 392 | } |
| 393 | |
| 394 | Symbol_table_key key(name_key, version_key); |
| 395 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
| 396 | if (p == this->table_.end()) |
| 397 | return NULL; |
| 398 | return p->second; |
| 399 | } |
| 400 | |
| 401 | // Resolve a Symbol with another Symbol. This is only used in the |
| 402 | // unusual case where there are references to both an unversioned |
| 403 | // symbol and a symbol with a version, and we then discover that that |
| 404 | // version is the default version. Because this is unusual, we do |
| 405 | // this the slow way, by converting back to an ELF symbol. |
| 406 | |
| 407 | template<int size, bool big_endian> |
| 408 | void |
| 409 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from, |
| 410 | const char* version ACCEPT_SIZE_ENDIAN) |
| 411 | { |
| 412 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
| 413 | elfcpp::Sym_write<size, big_endian> esym(buf); |
| 414 | // We don't bother to set the st_name field. |
| 415 | esym.put_st_value(from->value()); |
| 416 | esym.put_st_size(from->symsize()); |
| 417 | esym.put_st_info(from->binding(), from->type()); |
| 418 | esym.put_st_other(from->visibility(), from->nonvis()); |
| 419 | esym.put_st_shndx(from->shndx()); |
| 420 | this->resolve(to, esym.sym(), esym.sym(), from->object(), version); |
| 421 | if (from->in_reg()) |
| 422 | to->set_in_reg(); |
| 423 | if (from->in_dyn()) |
| 424 | to->set_in_dyn(); |
| 425 | } |
| 426 | |
| 427 | // Record that a symbol is forced to be local by a version script. |
| 428 | |
| 429 | void |
| 430 | Symbol_table::force_local(Symbol* sym) |
| 431 | { |
| 432 | if (!sym->is_defined() && !sym->is_common()) |
| 433 | return; |
| 434 | if (sym->is_forced_local()) |
| 435 | { |
| 436 | // We already got this one. |
| 437 | return; |
| 438 | } |
| 439 | sym->set_is_forced_local(); |
| 440 | this->forced_locals_.push_back(sym); |
| 441 | } |
| 442 | |
| 443 | // Add one symbol from OBJECT to the symbol table. NAME is symbol |
| 444 | // name and VERSION is the version; both are canonicalized. DEF is |
| 445 | // whether this is the default version. |
| 446 | |
| 447 | // If DEF is true, then this is the definition of a default version of |
| 448 | // a symbol. That means that any lookup of NAME/NULL and any lookup |
| 449 | // of NAME/VERSION should always return the same symbol. This is |
| 450 | // obvious for references, but in particular we want to do this for |
| 451 | // definitions: overriding NAME/NULL should also override |
| 452 | // NAME/VERSION. If we don't do that, it would be very hard to |
| 453 | // override functions in a shared library which uses versioning. |
| 454 | |
| 455 | // We implement this by simply making both entries in the hash table |
| 456 | // point to the same Symbol structure. That is easy enough if this is |
| 457 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible |
| 458 | // that we have seen both already, in which case they will both have |
| 459 | // independent entries in the symbol table. We can't simply change |
| 460 | // the symbol table entry, because we have pointers to the entries |
| 461 | // attached to the object files. So we mark the entry attached to the |
| 462 | // object file as a forwarder, and record it in the forwarders_ map. |
| 463 | // Note that entries in the hash table will never be marked as |
| 464 | // forwarders. |
| 465 | // |
| 466 | // SYM and ORIG_SYM are almost always the same. ORIG_SYM is the |
| 467 | // symbol exactly as it existed in the input file. SYM is usually |
| 468 | // that as well, but can be modified, for instance if we determine |
| 469 | // it's in a to-be-discarded section. |
| 470 | |
| 471 | template<int size, bool big_endian> |
| 472 | Sized_symbol<size>* |
| 473 | Symbol_table::add_from_object(Object* object, |
| 474 | const char *name, |
| 475 | Stringpool::Key name_key, |
| 476 | const char *version, |
| 477 | Stringpool::Key version_key, |
| 478 | bool def, |
| 479 | const elfcpp::Sym<size, big_endian>& sym, |
| 480 | const elfcpp::Sym<size, big_endian>& orig_sym) |
| 481 | { |
| 482 | Symbol* const snull = NULL; |
| 483 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
| 484 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
| 485 | snull)); |
| 486 | |
| 487 | std::pair<typename Symbol_table_type::iterator, bool> insdef = |
| 488 | std::make_pair(this->table_.end(), false); |
| 489 | if (def) |
| 490 | { |
| 491 | const Stringpool::Key vnull_key = 0; |
| 492 | insdef = this->table_.insert(std::make_pair(std::make_pair(name_key, |
| 493 | vnull_key), |
| 494 | snull)); |
| 495 | } |
| 496 | |
| 497 | // ins.first: an iterator, which is a pointer to a pair. |
| 498 | // ins.first->first: the key (a pair of name and version). |
| 499 | // ins.first->second: the value (Symbol*). |
| 500 | // ins.second: true if new entry was inserted, false if not. |
| 501 | |
| 502 | Sized_symbol<size>* ret; |
| 503 | bool was_undefined; |
| 504 | bool was_common; |
| 505 | if (!ins.second) |
| 506 | { |
| 507 | // We already have an entry for NAME/VERSION. |
| 508 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (ins.first->second |
| 509 | SELECT_SIZE(size)); |
| 510 | gold_assert(ret != NULL); |
| 511 | |
| 512 | was_undefined = ret->is_undefined(); |
| 513 | was_common = ret->is_common(); |
| 514 | |
| 515 | this->resolve(ret, sym, orig_sym, object, version); |
| 516 | |
| 517 | if (def) |
| 518 | { |
| 519 | if (insdef.second) |
| 520 | { |
| 521 | // This is the first time we have seen NAME/NULL. Make |
| 522 | // NAME/NULL point to NAME/VERSION. |
| 523 | insdef.first->second = ret; |
| 524 | } |
| 525 | else if (insdef.first->second != ret |
| 526 | && insdef.first->second->is_undefined()) |
| 527 | { |
| 528 | // This is the unfortunate case where we already have |
| 529 | // entries for both NAME/VERSION and NAME/NULL. Note |
| 530 | // that we don't want to combine them if the existing |
| 531 | // symbol is going to override the new one. FIXME: We |
| 532 | // currently just test is_undefined, but this may not do |
| 533 | // the right thing if the existing symbol is from a |
| 534 | // shared library and the new one is from a regular |
| 535 | // object. |
| 536 | |
| 537 | const Sized_symbol<size>* sym2; |
| 538 | sym2 = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
| 539 | insdef.first->second |
| 540 | SELECT_SIZE(size)); |
| 541 | Symbol_table::resolve SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
| 542 | ret, sym2, version SELECT_SIZE_ENDIAN(size, big_endian)); |
| 543 | this->make_forwarder(insdef.first->second, ret); |
| 544 | insdef.first->second = ret; |
| 545 | } |
| 546 | } |
| 547 | } |
| 548 | else |
| 549 | { |
| 550 | // This is the first time we have seen NAME/VERSION. |
| 551 | gold_assert(ins.first->second == NULL); |
| 552 | |
| 553 | was_undefined = false; |
| 554 | was_common = false; |
| 555 | |
| 556 | if (def && !insdef.second) |
| 557 | { |
| 558 | // We already have an entry for NAME/NULL. If we override |
| 559 | // it, then change it to NAME/VERSION. |
| 560 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
| 561 | insdef.first->second |
| 562 | SELECT_SIZE(size)); |
| 563 | this->resolve(ret, sym, orig_sym, object, version); |
| 564 | ins.first->second = ret; |
| 565 | } |
| 566 | else |
| 567 | { |
| 568 | Sized_target<size, big_endian>* target = |
| 569 | object->sized_target SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
| 570 | SELECT_SIZE_ENDIAN_ONLY(size, big_endian)); |
| 571 | if (!target->has_make_symbol()) |
| 572 | ret = new Sized_symbol<size>(); |
| 573 | else |
| 574 | { |
| 575 | ret = target->make_symbol(); |
| 576 | if (ret == NULL) |
| 577 | { |
| 578 | // This means that we don't want a symbol table |
| 579 | // entry after all. |
| 580 | if (!def) |
| 581 | this->table_.erase(ins.first); |
| 582 | else |
| 583 | { |
| 584 | this->table_.erase(insdef.first); |
| 585 | // Inserting insdef invalidated ins. |
| 586 | this->table_.erase(std::make_pair(name_key, |
| 587 | version_key)); |
| 588 | } |
| 589 | return NULL; |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | ret->init(name, version, object, sym); |
| 594 | |
| 595 | ins.first->second = ret; |
| 596 | if (def) |
| 597 | { |
| 598 | // This is the first time we have seen NAME/NULL. Point |
| 599 | // it at the new entry for NAME/VERSION. |
| 600 | gold_assert(insdef.second); |
| 601 | insdef.first->second = ret; |
| 602 | } |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | // Record every time we see a new undefined symbol, to speed up |
| 607 | // archive groups. |
| 608 | if (!was_undefined && ret->is_undefined()) |
| 609 | ++this->saw_undefined_; |
| 610 | |
| 611 | // Keep track of common symbols, to speed up common symbol |
| 612 | // allocation. |
| 613 | if (!was_common && ret->is_common()) |
| 614 | this->commons_.push_back(ret); |
| 615 | |
| 616 | ret->set_is_default(def); |
| 617 | return ret; |
| 618 | } |
| 619 | |
| 620 | // Add all the symbols in a relocatable object to the hash table. |
| 621 | |
| 622 | template<int size, bool big_endian> |
| 623 | void |
| 624 | Symbol_table::add_from_relobj( |
| 625 | Sized_relobj<size, big_endian>* relobj, |
| 626 | const unsigned char* syms, |
| 627 | size_t count, |
| 628 | const char* sym_names, |
| 629 | size_t sym_name_size, |
| 630 | typename Sized_relobj<size, big_endian>::Symbols* sympointers) |
| 631 | { |
| 632 | gold_assert(size == relobj->target()->get_size()); |
| 633 | gold_assert(size == parameters->get_size()); |
| 634 | |
| 635 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 636 | |
| 637 | const unsigned char* p = syms; |
| 638 | for (size_t i = 0; i < count; ++i, p += sym_size) |
| 639 | { |
| 640 | elfcpp::Sym<size, big_endian> sym(p); |
| 641 | elfcpp::Sym<size, big_endian>* psym = &sym; |
| 642 | |
| 643 | unsigned int st_name = psym->get_st_name(); |
| 644 | if (st_name >= sym_name_size) |
| 645 | { |
| 646 | relobj->error(_("bad global symbol name offset %u at %zu"), |
| 647 | st_name, i); |
| 648 | continue; |
| 649 | } |
| 650 | |
| 651 | const char* name = sym_names + st_name; |
| 652 | |
| 653 | // A symbol defined in a section which we are not including must |
| 654 | // be treated as an undefined symbol. |
| 655 | unsigned char symbuf[sym_size]; |
| 656 | elfcpp::Sym<size, big_endian> sym2(symbuf); |
| 657 | unsigned int st_shndx = psym->get_st_shndx(); |
| 658 | if (st_shndx != elfcpp::SHN_UNDEF |
| 659 | && st_shndx < elfcpp::SHN_LORESERVE |
| 660 | && !relobj->is_section_included(st_shndx)) |
| 661 | { |
| 662 | memcpy(symbuf, p, sym_size); |
| 663 | elfcpp::Sym_write<size, big_endian> sw(symbuf); |
| 664 | sw.put_st_shndx(elfcpp::SHN_UNDEF); |
| 665 | psym = &sym2; |
| 666 | } |
| 667 | |
| 668 | // In an object file, an '@' in the name separates the symbol |
| 669 | // name from the version name. If there are two '@' characters, |
| 670 | // this is the default version. |
| 671 | const char* ver = strchr(name, '@'); |
| 672 | int namelen = 0; |
| 673 | // DEF: is the version default? LOCAL: is the symbol forced local? |
| 674 | bool def = false; |
| 675 | bool local = false; |
| 676 | |
| 677 | if (ver != NULL) |
| 678 | { |
| 679 | // The symbol name is of the form foo@VERSION or foo@@VERSION |
| 680 | namelen = ver - name; |
| 681 | ++ver; |
| 682 | if (*ver == '@') |
| 683 | { |
| 684 | def = true; |
| 685 | ++ver; |
| 686 | } |
| 687 | } |
| 688 | else if (!version_script_.empty()) |
| 689 | { |
| 690 | // The symbol name did not have a version, but |
| 691 | // the version script may assign a version anyway. |
| 692 | namelen = strlen(name); |
| 693 | def = true; |
| 694 | // Check the global: entries from the version script. |
| 695 | const std::string& version = |
| 696 | version_script_.get_symbol_version(name); |
| 697 | if (!version.empty()) |
| 698 | ver = version.c_str(); |
| 699 | // Check the local: entries from the version script |
| 700 | if (version_script_.symbol_is_local(name)) |
| 701 | local = true; |
| 702 | } |
| 703 | |
| 704 | Sized_symbol<size>* res; |
| 705 | if (ver == NULL) |
| 706 | { |
| 707 | Stringpool::Key name_key; |
| 708 | name = this->namepool_.add(name, true, &name_key); |
| 709 | res = this->add_from_object(relobj, name, name_key, NULL, 0, |
| 710 | false, *psym, sym); |
| 711 | if (local) |
| 712 | this->force_local(res); |
| 713 | } |
| 714 | else |
| 715 | { |
| 716 | Stringpool::Key name_key; |
| 717 | name = this->namepool_.add_with_length(name, namelen, true, |
| 718 | &name_key); |
| 719 | Stringpool::Key ver_key; |
| 720 | ver = this->namepool_.add(ver, true, &ver_key); |
| 721 | |
| 722 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
| 723 | def, *psym, sym); |
| 724 | } |
| 725 | |
| 726 | (*sympointers)[i] = res; |
| 727 | } |
| 728 | } |
| 729 | |
| 730 | // Add all the symbols in a dynamic object to the hash table. |
| 731 | |
| 732 | template<int size, bool big_endian> |
| 733 | void |
| 734 | Symbol_table::add_from_dynobj( |
| 735 | Sized_dynobj<size, big_endian>* dynobj, |
| 736 | const unsigned char* syms, |
| 737 | size_t count, |
| 738 | const char* sym_names, |
| 739 | size_t sym_name_size, |
| 740 | const unsigned char* versym, |
| 741 | size_t versym_size, |
| 742 | const std::vector<const char*>* version_map) |
| 743 | { |
| 744 | gold_assert(size == dynobj->target()->get_size()); |
| 745 | gold_assert(size == parameters->get_size()); |
| 746 | |
| 747 | if (versym != NULL && versym_size / 2 < count) |
| 748 | { |
| 749 | dynobj->error(_("too few symbol versions")); |
| 750 | return; |
| 751 | } |
| 752 | |
| 753 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 754 | |
| 755 | // We keep a list of all STT_OBJECT symbols, so that we can resolve |
| 756 | // weak aliases. This is necessary because if the dynamic object |
| 757 | // provides the same variable under two names, one of which is a |
| 758 | // weak definition, and the regular object refers to the weak |
| 759 | // definition, we have to put both the weak definition and the |
| 760 | // strong definition into the dynamic symbol table. Given a weak |
| 761 | // definition, the only way that we can find the corresponding |
| 762 | // strong definition, if any, is to search the symbol table. |
| 763 | std::vector<Sized_symbol<size>*> object_symbols; |
| 764 | |
| 765 | const unsigned char* p = syms; |
| 766 | const unsigned char* vs = versym; |
| 767 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) |
| 768 | { |
| 769 | elfcpp::Sym<size, big_endian> sym(p); |
| 770 | |
| 771 | // Ignore symbols with local binding or that have |
| 772 | // internal or hidden visibility. |
| 773 | if (sym.get_st_bind() == elfcpp::STB_LOCAL |
| 774 | || sym.get_st_visibility() == elfcpp::STV_INTERNAL |
| 775 | || sym.get_st_visibility() == elfcpp::STV_HIDDEN) |
| 776 | continue; |
| 777 | |
| 778 | unsigned int st_name = sym.get_st_name(); |
| 779 | if (st_name >= sym_name_size) |
| 780 | { |
| 781 | dynobj->error(_("bad symbol name offset %u at %zu"), |
| 782 | st_name, i); |
| 783 | continue; |
| 784 | } |
| 785 | |
| 786 | const char* name = sym_names + st_name; |
| 787 | |
| 788 | Sized_symbol<size>* res; |
| 789 | |
| 790 | if (versym == NULL) |
| 791 | { |
| 792 | Stringpool::Key name_key; |
| 793 | name = this->namepool_.add(name, true, &name_key); |
| 794 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
| 795 | false, sym, sym); |
| 796 | } |
| 797 | else |
| 798 | { |
| 799 | // Read the version information. |
| 800 | |
| 801 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); |
| 802 | |
| 803 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; |
| 804 | v &= elfcpp::VERSYM_VERSION; |
| 805 | |
| 806 | // The Sun documentation says that V can be VER_NDX_LOCAL, |
| 807 | // or VER_NDX_GLOBAL, or a version index. The meaning of |
| 808 | // VER_NDX_LOCAL is defined as "Symbol has local scope." |
| 809 | // The old GNU linker will happily generate VER_NDX_LOCAL |
| 810 | // for an undefined symbol. I don't know what the Sun |
| 811 | // linker will generate. |
| 812 | |
| 813 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
| 814 | && sym.get_st_shndx() != elfcpp::SHN_UNDEF) |
| 815 | { |
| 816 | // This symbol should not be visible outside the object. |
| 817 | continue; |
| 818 | } |
| 819 | |
| 820 | // At this point we are definitely going to add this symbol. |
| 821 | Stringpool::Key name_key; |
| 822 | name = this->namepool_.add(name, true, &name_key); |
| 823 | |
| 824 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
| 825 | || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) |
| 826 | { |
| 827 | // This symbol does not have a version. |
| 828 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
| 829 | false, sym, sym); |
| 830 | } |
| 831 | else |
| 832 | { |
| 833 | if (v >= version_map->size()) |
| 834 | { |
| 835 | dynobj->error(_("versym for symbol %zu out of range: %u"), |
| 836 | i, v); |
| 837 | continue; |
| 838 | } |
| 839 | |
| 840 | const char* version = (*version_map)[v]; |
| 841 | if (version == NULL) |
| 842 | { |
| 843 | dynobj->error(_("versym for symbol %zu has no name: %u"), |
| 844 | i, v); |
| 845 | continue; |
| 846 | } |
| 847 | |
| 848 | Stringpool::Key version_key; |
| 849 | version = this->namepool_.add(version, true, &version_key); |
| 850 | |
| 851 | // If this is an absolute symbol, and the version name |
| 852 | // and symbol name are the same, then this is the |
| 853 | // version definition symbol. These symbols exist to |
| 854 | // support using -u to pull in particular versions. We |
| 855 | // do not want to record a version for them. |
| 856 | if (sym.get_st_shndx() == elfcpp::SHN_ABS |
| 857 | && name_key == version_key) |
| 858 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
| 859 | false, sym, sym); |
| 860 | else |
| 861 | { |
| 862 | const bool def = (!hidden |
| 863 | && (sym.get_st_shndx() |
| 864 | != elfcpp::SHN_UNDEF)); |
| 865 | res = this->add_from_object(dynobj, name, name_key, version, |
| 866 | version_key, def, sym, sym); |
| 867 | } |
| 868 | } |
| 869 | } |
| 870 | |
| 871 | if (sym.get_st_shndx() != elfcpp::SHN_UNDEF |
| 872 | && sym.get_st_type() == elfcpp::STT_OBJECT) |
| 873 | object_symbols.push_back(res); |
| 874 | } |
| 875 | |
| 876 | this->record_weak_aliases(&object_symbols); |
| 877 | } |
| 878 | |
| 879 | // This is used to sort weak aliases. We sort them first by section |
| 880 | // index, then by offset, then by weak ahead of strong. |
| 881 | |
| 882 | template<int size> |
| 883 | class Weak_alias_sorter |
| 884 | { |
| 885 | public: |
| 886 | bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const; |
| 887 | }; |
| 888 | |
| 889 | template<int size> |
| 890 | bool |
| 891 | Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1, |
| 892 | const Sized_symbol<size>* s2) const |
| 893 | { |
| 894 | if (s1->shndx() != s2->shndx()) |
| 895 | return s1->shndx() < s2->shndx(); |
| 896 | if (s1->value() != s2->value()) |
| 897 | return s1->value() < s2->value(); |
| 898 | if (s1->binding() != s2->binding()) |
| 899 | { |
| 900 | if (s1->binding() == elfcpp::STB_WEAK) |
| 901 | return true; |
| 902 | if (s2->binding() == elfcpp::STB_WEAK) |
| 903 | return false; |
| 904 | } |
| 905 | return std::string(s1->name()) < std::string(s2->name()); |
| 906 | } |
| 907 | |
| 908 | // SYMBOLS is a list of object symbols from a dynamic object. Look |
| 909 | // for any weak aliases, and record them so that if we add the weak |
| 910 | // alias to the dynamic symbol table, we also add the corresponding |
| 911 | // strong symbol. |
| 912 | |
| 913 | template<int size> |
| 914 | void |
| 915 | Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols) |
| 916 | { |
| 917 | // Sort the vector by section index, then by offset, then by weak |
| 918 | // ahead of strong. |
| 919 | std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>()); |
| 920 | |
| 921 | // Walk through the vector. For each weak definition, record |
| 922 | // aliases. |
| 923 | for (typename std::vector<Sized_symbol<size>*>::const_iterator p = |
| 924 | symbols->begin(); |
| 925 | p != symbols->end(); |
| 926 | ++p) |
| 927 | { |
| 928 | if ((*p)->binding() != elfcpp::STB_WEAK) |
| 929 | continue; |
| 930 | |
| 931 | // Build a circular list of weak aliases. Each symbol points to |
| 932 | // the next one in the circular list. |
| 933 | |
| 934 | Sized_symbol<size>* from_sym = *p; |
| 935 | typename std::vector<Sized_symbol<size>*>::const_iterator q; |
| 936 | for (q = p + 1; q != symbols->end(); ++q) |
| 937 | { |
| 938 | if ((*q)->shndx() != from_sym->shndx() |
| 939 | || (*q)->value() != from_sym->value()) |
| 940 | break; |
| 941 | |
| 942 | this->weak_aliases_[from_sym] = *q; |
| 943 | from_sym->set_has_alias(); |
| 944 | from_sym = *q; |
| 945 | } |
| 946 | |
| 947 | if (from_sym != *p) |
| 948 | { |
| 949 | this->weak_aliases_[from_sym] = *p; |
| 950 | from_sym->set_has_alias(); |
| 951 | } |
| 952 | |
| 953 | p = q - 1; |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
| 958 | // true, then only create the symbol if there is a reference to it. |
| 959 | // If this does not return NULL, it sets *POLDSYM to the existing |
| 960 | // symbol if there is one. This canonicalizes *PNAME and *PVERSION. |
| 961 | |
| 962 | template<int size, bool big_endian> |
| 963 | Sized_symbol<size>* |
| 964 | Symbol_table::define_special_symbol(const char** pname, const char** pversion, |
| 965 | bool only_if_ref, |
| 966 | Sized_symbol<size>** poldsym |
| 967 | ACCEPT_SIZE_ENDIAN) |
| 968 | { |
| 969 | Symbol* oldsym; |
| 970 | Sized_symbol<size>* sym; |
| 971 | bool add_to_table = false; |
| 972 | typename Symbol_table_type::iterator add_loc = this->table_.end(); |
| 973 | |
| 974 | // If the caller didn't give us a version, see if we get one from |
| 975 | // the version script. |
| 976 | if (*pversion == NULL) |
| 977 | { |
| 978 | const std::string& v(this->version_script_.get_symbol_version(*pname)); |
| 979 | if (!v.empty()) |
| 980 | *pversion = v.c_str(); |
| 981 | } |
| 982 | |
| 983 | if (only_if_ref) |
| 984 | { |
| 985 | oldsym = this->lookup(*pname, *pversion); |
| 986 | if (oldsym == NULL || !oldsym->is_undefined()) |
| 987 | return NULL; |
| 988 | |
| 989 | *pname = oldsym->name(); |
| 990 | *pversion = oldsym->version(); |
| 991 | } |
| 992 | else |
| 993 | { |
| 994 | // Canonicalize NAME and VERSION. |
| 995 | Stringpool::Key name_key; |
| 996 | *pname = this->namepool_.add(*pname, true, &name_key); |
| 997 | |
| 998 | Stringpool::Key version_key = 0; |
| 999 | if (*pversion != NULL) |
| 1000 | *pversion = this->namepool_.add(*pversion, true, &version_key); |
| 1001 | |
| 1002 | Symbol* const snull = NULL; |
| 1003 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
| 1004 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
| 1005 | version_key), |
| 1006 | snull)); |
| 1007 | |
| 1008 | if (!ins.second) |
| 1009 | { |
| 1010 | // We already have a symbol table entry for NAME/VERSION. |
| 1011 | oldsym = ins.first->second; |
| 1012 | gold_assert(oldsym != NULL); |
| 1013 | } |
| 1014 | else |
| 1015 | { |
| 1016 | // We haven't seen this symbol before. |
| 1017 | gold_assert(ins.first->second == NULL); |
| 1018 | add_to_table = true; |
| 1019 | add_loc = ins.first; |
| 1020 | oldsym = NULL; |
| 1021 | } |
| 1022 | } |
| 1023 | |
| 1024 | const Target* target = parameters->target(); |
| 1025 | if (!target->has_make_symbol()) |
| 1026 | sym = new Sized_symbol<size>(); |
| 1027 | else |
| 1028 | { |
| 1029 | gold_assert(target->get_size() == size); |
| 1030 | gold_assert(target->is_big_endian() ? big_endian : !big_endian); |
| 1031 | typedef Sized_target<size, big_endian> My_target; |
| 1032 | const My_target* sized_target = |
| 1033 | static_cast<const My_target*>(target); |
| 1034 | sym = sized_target->make_symbol(); |
| 1035 | if (sym == NULL) |
| 1036 | return NULL; |
| 1037 | } |
| 1038 | |
| 1039 | if (add_to_table) |
| 1040 | add_loc->second = sym; |
| 1041 | else |
| 1042 | gold_assert(oldsym != NULL); |
| 1043 | |
| 1044 | *poldsym = this->get_sized_symbol SELECT_SIZE_NAME(size) (oldsym |
| 1045 | SELECT_SIZE(size)); |
| 1046 | |
| 1047 | return sym; |
| 1048 | } |
| 1049 | |
| 1050 | // Define a symbol based on an Output_data. |
| 1051 | |
| 1052 | Symbol* |
| 1053 | Symbol_table::define_in_output_data(const char* name, |
| 1054 | const char* version, |
| 1055 | Output_data* od, |
| 1056 | uint64_t value, |
| 1057 | uint64_t symsize, |
| 1058 | elfcpp::STT type, |
| 1059 | elfcpp::STB binding, |
| 1060 | elfcpp::STV visibility, |
| 1061 | unsigned char nonvis, |
| 1062 | bool offset_is_from_end, |
| 1063 | bool only_if_ref) |
| 1064 | { |
| 1065 | if (parameters->get_size() == 32) |
| 1066 | { |
| 1067 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 1068 | return this->do_define_in_output_data<32>(name, version, od, |
| 1069 | value, symsize, type, binding, |
| 1070 | visibility, nonvis, |
| 1071 | offset_is_from_end, |
| 1072 | only_if_ref); |
| 1073 | #else |
| 1074 | gold_unreachable(); |
| 1075 | #endif |
| 1076 | } |
| 1077 | else if (parameters->get_size() == 64) |
| 1078 | { |
| 1079 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 1080 | return this->do_define_in_output_data<64>(name, version, od, |
| 1081 | value, symsize, type, binding, |
| 1082 | visibility, nonvis, |
| 1083 | offset_is_from_end, |
| 1084 | only_if_ref); |
| 1085 | #else |
| 1086 | gold_unreachable(); |
| 1087 | #endif |
| 1088 | } |
| 1089 | else |
| 1090 | gold_unreachable(); |
| 1091 | } |
| 1092 | |
| 1093 | // Define a symbol in an Output_data, sized version. |
| 1094 | |
| 1095 | template<int size> |
| 1096 | Sized_symbol<size>* |
| 1097 | Symbol_table::do_define_in_output_data( |
| 1098 | const char* name, |
| 1099 | const char* version, |
| 1100 | Output_data* od, |
| 1101 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 1102 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, |
| 1103 | elfcpp::STT type, |
| 1104 | elfcpp::STB binding, |
| 1105 | elfcpp::STV visibility, |
| 1106 | unsigned char nonvis, |
| 1107 | bool offset_is_from_end, |
| 1108 | bool only_if_ref) |
| 1109 | { |
| 1110 | Sized_symbol<size>* sym; |
| 1111 | Sized_symbol<size>* oldsym; |
| 1112 | |
| 1113 | if (parameters->is_big_endian()) |
| 1114 | { |
| 1115 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) |
| 1116 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( |
| 1117 | &name, &version, only_if_ref, &oldsym |
| 1118 | SELECT_SIZE_ENDIAN(size, true)); |
| 1119 | #else |
| 1120 | gold_unreachable(); |
| 1121 | #endif |
| 1122 | } |
| 1123 | else |
| 1124 | { |
| 1125 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) |
| 1126 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( |
| 1127 | &name, &version, only_if_ref, &oldsym |
| 1128 | SELECT_SIZE_ENDIAN(size, false)); |
| 1129 | #else |
| 1130 | gold_unreachable(); |
| 1131 | #endif |
| 1132 | } |
| 1133 | |
| 1134 | if (sym == NULL) |
| 1135 | return NULL; |
| 1136 | |
| 1137 | gold_assert(version == NULL || oldsym != NULL); |
| 1138 | sym->init(name, od, value, symsize, type, binding, visibility, nonvis, |
| 1139 | offset_is_from_end); |
| 1140 | |
| 1141 | if (oldsym == NULL) |
| 1142 | { |
| 1143 | if (binding == elfcpp::STB_LOCAL |
| 1144 | || this->version_script_.symbol_is_local(name)) |
| 1145 | this->force_local(sym); |
| 1146 | return sym; |
| 1147 | } |
| 1148 | |
| 1149 | if (Symbol_table::should_override_with_special(oldsym)) |
| 1150 | this->override_with_special(oldsym, sym); |
| 1151 | delete sym; |
| 1152 | return oldsym; |
| 1153 | } |
| 1154 | |
| 1155 | // Define a symbol based on an Output_segment. |
| 1156 | |
| 1157 | Symbol* |
| 1158 | Symbol_table::define_in_output_segment(const char* name, |
| 1159 | const char* version, Output_segment* os, |
| 1160 | uint64_t value, |
| 1161 | uint64_t symsize, |
| 1162 | elfcpp::STT type, |
| 1163 | elfcpp::STB binding, |
| 1164 | elfcpp::STV visibility, |
| 1165 | unsigned char nonvis, |
| 1166 | Symbol::Segment_offset_base offset_base, |
| 1167 | bool only_if_ref) |
| 1168 | { |
| 1169 | if (parameters->get_size() == 32) |
| 1170 | { |
| 1171 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 1172 | return this->do_define_in_output_segment<32>(name, version, os, |
| 1173 | value, symsize, type, |
| 1174 | binding, visibility, nonvis, |
| 1175 | offset_base, only_if_ref); |
| 1176 | #else |
| 1177 | gold_unreachable(); |
| 1178 | #endif |
| 1179 | } |
| 1180 | else if (parameters->get_size() == 64) |
| 1181 | { |
| 1182 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 1183 | return this->do_define_in_output_segment<64>(name, version, os, |
| 1184 | value, symsize, type, |
| 1185 | binding, visibility, nonvis, |
| 1186 | offset_base, only_if_ref); |
| 1187 | #else |
| 1188 | gold_unreachable(); |
| 1189 | #endif |
| 1190 | } |
| 1191 | else |
| 1192 | gold_unreachable(); |
| 1193 | } |
| 1194 | |
| 1195 | // Define a symbol in an Output_segment, sized version. |
| 1196 | |
| 1197 | template<int size> |
| 1198 | Sized_symbol<size>* |
| 1199 | Symbol_table::do_define_in_output_segment( |
| 1200 | const char* name, |
| 1201 | const char* version, |
| 1202 | Output_segment* os, |
| 1203 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 1204 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, |
| 1205 | elfcpp::STT type, |
| 1206 | elfcpp::STB binding, |
| 1207 | elfcpp::STV visibility, |
| 1208 | unsigned char nonvis, |
| 1209 | Symbol::Segment_offset_base offset_base, |
| 1210 | bool only_if_ref) |
| 1211 | { |
| 1212 | Sized_symbol<size>* sym; |
| 1213 | Sized_symbol<size>* oldsym; |
| 1214 | |
| 1215 | if (parameters->is_big_endian()) |
| 1216 | { |
| 1217 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) |
| 1218 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( |
| 1219 | &name, &version, only_if_ref, &oldsym |
| 1220 | SELECT_SIZE_ENDIAN(size, true)); |
| 1221 | #else |
| 1222 | gold_unreachable(); |
| 1223 | #endif |
| 1224 | } |
| 1225 | else |
| 1226 | { |
| 1227 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) |
| 1228 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( |
| 1229 | &name, &version, only_if_ref, &oldsym |
| 1230 | SELECT_SIZE_ENDIAN(size, false)); |
| 1231 | #else |
| 1232 | gold_unreachable(); |
| 1233 | #endif |
| 1234 | } |
| 1235 | |
| 1236 | if (sym == NULL) |
| 1237 | return NULL; |
| 1238 | |
| 1239 | gold_assert(version == NULL || oldsym != NULL); |
| 1240 | sym->init(name, os, value, symsize, type, binding, visibility, nonvis, |
| 1241 | offset_base); |
| 1242 | |
| 1243 | if (oldsym == NULL) |
| 1244 | { |
| 1245 | if (binding == elfcpp::STB_LOCAL |
| 1246 | || this->version_script_.symbol_is_local(name)) |
| 1247 | this->force_local(sym); |
| 1248 | return sym; |
| 1249 | } |
| 1250 | |
| 1251 | if (Symbol_table::should_override_with_special(oldsym)) |
| 1252 | this->override_with_special(oldsym, sym); |
| 1253 | delete sym; |
| 1254 | return oldsym; |
| 1255 | } |
| 1256 | |
| 1257 | // Define a special symbol with a constant value. It is a multiple |
| 1258 | // definition error if this symbol is already defined. |
| 1259 | |
| 1260 | Symbol* |
| 1261 | Symbol_table::define_as_constant(const char* name, |
| 1262 | const char* version, |
| 1263 | uint64_t value, |
| 1264 | uint64_t symsize, |
| 1265 | elfcpp::STT type, |
| 1266 | elfcpp::STB binding, |
| 1267 | elfcpp::STV visibility, |
| 1268 | unsigned char nonvis, |
| 1269 | bool only_if_ref) |
| 1270 | { |
| 1271 | if (parameters->get_size() == 32) |
| 1272 | { |
| 1273 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 1274 | return this->do_define_as_constant<32>(name, version, value, |
| 1275 | symsize, type, binding, |
| 1276 | visibility, nonvis, only_if_ref); |
| 1277 | #else |
| 1278 | gold_unreachable(); |
| 1279 | #endif |
| 1280 | } |
| 1281 | else if (parameters->get_size() == 64) |
| 1282 | { |
| 1283 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 1284 | return this->do_define_as_constant<64>(name, version, value, |
| 1285 | symsize, type, binding, |
| 1286 | visibility, nonvis, only_if_ref); |
| 1287 | #else |
| 1288 | gold_unreachable(); |
| 1289 | #endif |
| 1290 | } |
| 1291 | else |
| 1292 | gold_unreachable(); |
| 1293 | } |
| 1294 | |
| 1295 | // Define a symbol as a constant, sized version. |
| 1296 | |
| 1297 | template<int size> |
| 1298 | Sized_symbol<size>* |
| 1299 | Symbol_table::do_define_as_constant( |
| 1300 | const char* name, |
| 1301 | const char* version, |
| 1302 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 1303 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, |
| 1304 | elfcpp::STT type, |
| 1305 | elfcpp::STB binding, |
| 1306 | elfcpp::STV visibility, |
| 1307 | unsigned char nonvis, |
| 1308 | bool only_if_ref) |
| 1309 | { |
| 1310 | Sized_symbol<size>* sym; |
| 1311 | Sized_symbol<size>* oldsym; |
| 1312 | |
| 1313 | if (parameters->is_big_endian()) |
| 1314 | { |
| 1315 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) |
| 1316 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( |
| 1317 | &name, &version, only_if_ref, &oldsym |
| 1318 | SELECT_SIZE_ENDIAN(size, true)); |
| 1319 | #else |
| 1320 | gold_unreachable(); |
| 1321 | #endif |
| 1322 | } |
| 1323 | else |
| 1324 | { |
| 1325 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) |
| 1326 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( |
| 1327 | &name, &version, only_if_ref, &oldsym |
| 1328 | SELECT_SIZE_ENDIAN(size, false)); |
| 1329 | #else |
| 1330 | gold_unreachable(); |
| 1331 | #endif |
| 1332 | } |
| 1333 | |
| 1334 | if (sym == NULL) |
| 1335 | return NULL; |
| 1336 | |
| 1337 | gold_assert(version == NULL || version == name || oldsym != NULL); |
| 1338 | sym->init(name, value, symsize, type, binding, visibility, nonvis); |
| 1339 | |
| 1340 | if (oldsym == NULL) |
| 1341 | { |
| 1342 | if (binding == elfcpp::STB_LOCAL |
| 1343 | || this->version_script_.symbol_is_local(name)) |
| 1344 | this->force_local(sym); |
| 1345 | return sym; |
| 1346 | } |
| 1347 | |
| 1348 | if (Symbol_table::should_override_with_special(oldsym)) |
| 1349 | this->override_with_special(oldsym, sym); |
| 1350 | delete sym; |
| 1351 | return oldsym; |
| 1352 | } |
| 1353 | |
| 1354 | // Define a set of symbols in output sections. |
| 1355 | |
| 1356 | void |
| 1357 | Symbol_table::define_symbols(const Layout* layout, int count, |
| 1358 | const Define_symbol_in_section* p, |
| 1359 | bool only_if_ref) |
| 1360 | { |
| 1361 | for (int i = 0; i < count; ++i, ++p) |
| 1362 | { |
| 1363 | Output_section* os = layout->find_output_section(p->output_section); |
| 1364 | if (os != NULL) |
| 1365 | this->define_in_output_data(p->name, NULL, os, p->value, |
| 1366 | p->size, p->type, p->binding, |
| 1367 | p->visibility, p->nonvis, |
| 1368 | p->offset_is_from_end, |
| 1369 | only_if_ref || p->only_if_ref); |
| 1370 | else |
| 1371 | this->define_as_constant(p->name, NULL, 0, p->size, p->type, |
| 1372 | p->binding, p->visibility, p->nonvis, |
| 1373 | only_if_ref || p->only_if_ref); |
| 1374 | } |
| 1375 | } |
| 1376 | |
| 1377 | // Define a set of symbols in output segments. |
| 1378 | |
| 1379 | void |
| 1380 | Symbol_table::define_symbols(const Layout* layout, int count, |
| 1381 | const Define_symbol_in_segment* p, |
| 1382 | bool only_if_ref) |
| 1383 | { |
| 1384 | for (int i = 0; i < count; ++i, ++p) |
| 1385 | { |
| 1386 | Output_segment* os = layout->find_output_segment(p->segment_type, |
| 1387 | p->segment_flags_set, |
| 1388 | p->segment_flags_clear); |
| 1389 | if (os != NULL) |
| 1390 | this->define_in_output_segment(p->name, NULL, os, p->value, |
| 1391 | p->size, p->type, p->binding, |
| 1392 | p->visibility, p->nonvis, |
| 1393 | p->offset_base, |
| 1394 | only_if_ref || p->only_if_ref); |
| 1395 | else |
| 1396 | this->define_as_constant(p->name, NULL, 0, p->size, p->type, |
| 1397 | p->binding, p->visibility, p->nonvis, |
| 1398 | only_if_ref || p->only_if_ref); |
| 1399 | } |
| 1400 | } |
| 1401 | |
| 1402 | // Define CSYM using a COPY reloc. POSD is the Output_data where the |
| 1403 | // symbol should be defined--typically a .dyn.bss section. VALUE is |
| 1404 | // the offset within POSD. |
| 1405 | |
| 1406 | template<int size> |
| 1407 | void |
| 1408 | Symbol_table::define_with_copy_reloc( |
| 1409 | Sized_symbol<size>* csym, |
| 1410 | Output_data* posd, |
| 1411 | typename elfcpp::Elf_types<size>::Elf_Addr value) |
| 1412 | { |
| 1413 | gold_assert(csym->is_from_dynobj()); |
| 1414 | gold_assert(!csym->is_copied_from_dynobj()); |
| 1415 | Object* object = csym->object(); |
| 1416 | gold_assert(object->is_dynamic()); |
| 1417 | Dynobj* dynobj = static_cast<Dynobj*>(object); |
| 1418 | |
| 1419 | // Our copied variable has to override any variable in a shared |
| 1420 | // library. |
| 1421 | elfcpp::STB binding = csym->binding(); |
| 1422 | if (binding == elfcpp::STB_WEAK) |
| 1423 | binding = elfcpp::STB_GLOBAL; |
| 1424 | |
| 1425 | this->define_in_output_data(csym->name(), csym->version(), |
| 1426 | posd, value, csym->symsize(), |
| 1427 | csym->type(), binding, |
| 1428 | csym->visibility(), csym->nonvis(), |
| 1429 | false, false); |
| 1430 | |
| 1431 | csym->set_is_copied_from_dynobj(); |
| 1432 | csym->set_needs_dynsym_entry(); |
| 1433 | |
| 1434 | this->copied_symbol_dynobjs_[csym] = dynobj; |
| 1435 | |
| 1436 | // We have now defined all aliases, but we have not entered them all |
| 1437 | // in the copied_symbol_dynobjs_ map. |
| 1438 | if (csym->has_alias()) |
| 1439 | { |
| 1440 | Symbol* sym = csym; |
| 1441 | while (true) |
| 1442 | { |
| 1443 | sym = this->weak_aliases_[sym]; |
| 1444 | if (sym == csym) |
| 1445 | break; |
| 1446 | gold_assert(sym->output_data() == posd); |
| 1447 | |
| 1448 | sym->set_is_copied_from_dynobj(); |
| 1449 | this->copied_symbol_dynobjs_[sym] = dynobj; |
| 1450 | } |
| 1451 | } |
| 1452 | } |
| 1453 | |
| 1454 | // SYM is defined using a COPY reloc. Return the dynamic object where |
| 1455 | // the original definition was found. |
| 1456 | |
| 1457 | Dynobj* |
| 1458 | Symbol_table::get_copy_source(const Symbol* sym) const |
| 1459 | { |
| 1460 | gold_assert(sym->is_copied_from_dynobj()); |
| 1461 | Copied_symbol_dynobjs::const_iterator p = |
| 1462 | this->copied_symbol_dynobjs_.find(sym); |
| 1463 | gold_assert(p != this->copied_symbol_dynobjs_.end()); |
| 1464 | return p->second; |
| 1465 | } |
| 1466 | |
| 1467 | // Set the dynamic symbol indexes. INDEX is the index of the first |
| 1468 | // global dynamic symbol. Pointers to the symbols are stored into the |
| 1469 | // vector SYMS. The names are added to DYNPOOL. This returns an |
| 1470 | // updated dynamic symbol index. |
| 1471 | |
| 1472 | unsigned int |
| 1473 | Symbol_table::set_dynsym_indexes(unsigned int index, |
| 1474 | std::vector<Symbol*>* syms, |
| 1475 | Stringpool* dynpool, |
| 1476 | Versions* versions) |
| 1477 | { |
| 1478 | for (Symbol_table_type::iterator p = this->table_.begin(); |
| 1479 | p != this->table_.end(); |
| 1480 | ++p) |
| 1481 | { |
| 1482 | Symbol* sym = p->second; |
| 1483 | |
| 1484 | // Note that SYM may already have a dynamic symbol index, since |
| 1485 | // some symbols appear more than once in the symbol table, with |
| 1486 | // and without a version. |
| 1487 | |
| 1488 | if (!sym->should_add_dynsym_entry()) |
| 1489 | sym->set_dynsym_index(-1U); |
| 1490 | else if (!sym->has_dynsym_index()) |
| 1491 | { |
| 1492 | sym->set_dynsym_index(index); |
| 1493 | ++index; |
| 1494 | syms->push_back(sym); |
| 1495 | dynpool->add(sym->name(), false, NULL); |
| 1496 | |
| 1497 | // Record any version information. |
| 1498 | if (sym->version() != NULL) |
| 1499 | versions->record_version(this, dynpool, sym); |
| 1500 | } |
| 1501 | } |
| 1502 | |
| 1503 | // Finish up the versions. In some cases this may add new dynamic |
| 1504 | // symbols. |
| 1505 | index = versions->finalize(this, index, syms); |
| 1506 | |
| 1507 | return index; |
| 1508 | } |
| 1509 | |
| 1510 | // Set the final values for all the symbols. The index of the first |
| 1511 | // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the |
| 1512 | // file offset OFF. Add their names to POOL. Return the new file |
| 1513 | // offset. Update *PLOCAL_SYMCOUNT if necessary. |
| 1514 | |
| 1515 | off_t |
| 1516 | Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index, |
| 1517 | size_t dyncount, Stringpool* pool, |
| 1518 | unsigned int *plocal_symcount) |
| 1519 | { |
| 1520 | off_t ret; |
| 1521 | |
| 1522 | gold_assert(*plocal_symcount != 0); |
| 1523 | this->first_global_index_ = *plocal_symcount; |
| 1524 | |
| 1525 | this->dynamic_offset_ = dynoff; |
| 1526 | this->first_dynamic_global_index_ = dyn_global_index; |
| 1527 | this->dynamic_count_ = dyncount; |
| 1528 | |
| 1529 | if (parameters->get_size() == 32) |
| 1530 | { |
| 1531 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE) |
| 1532 | ret = this->sized_finalize<32>(off, pool, plocal_symcount); |
| 1533 | #else |
| 1534 | gold_unreachable(); |
| 1535 | #endif |
| 1536 | } |
| 1537 | else if (parameters->get_size() == 64) |
| 1538 | { |
| 1539 | #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE) |
| 1540 | ret = this->sized_finalize<64>(off, pool, plocal_symcount); |
| 1541 | #else |
| 1542 | gold_unreachable(); |
| 1543 | #endif |
| 1544 | } |
| 1545 | else |
| 1546 | gold_unreachable(); |
| 1547 | |
| 1548 | // Now that we have the final symbol table, we can reliably note |
| 1549 | // which symbols should get warnings. |
| 1550 | this->warnings_.note_warnings(this); |
| 1551 | |
| 1552 | return ret; |
| 1553 | } |
| 1554 | |
| 1555 | // SYM is going into the symbol table at *PINDEX. Add the name to |
| 1556 | // POOL, update *PINDEX and *POFF. |
| 1557 | |
| 1558 | template<int size> |
| 1559 | void |
| 1560 | Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool, |
| 1561 | unsigned int* pindex, off_t* poff) |
| 1562 | { |
| 1563 | sym->set_symtab_index(*pindex); |
| 1564 | pool->add(sym->name(), false, NULL); |
| 1565 | ++*pindex; |
| 1566 | *poff += elfcpp::Elf_sizes<size>::sym_size; |
| 1567 | } |
| 1568 | |
| 1569 | // Set the final value for all the symbols. This is called after |
| 1570 | // Layout::finalize, so all the output sections have their final |
| 1571 | // address. |
| 1572 | |
| 1573 | template<int size> |
| 1574 | off_t |
| 1575 | Symbol_table::sized_finalize(off_t off, Stringpool* pool, |
| 1576 | unsigned int* plocal_symcount) |
| 1577 | { |
| 1578 | off = align_address(off, size >> 3); |
| 1579 | this->offset_ = off; |
| 1580 | |
| 1581 | unsigned int index = *plocal_symcount; |
| 1582 | const unsigned int orig_index = index; |
| 1583 | |
| 1584 | // First do all the symbols which have been forced to be local, as |
| 1585 | // they must appear before all global symbols. |
| 1586 | for (Forced_locals::iterator p = this->forced_locals_.begin(); |
| 1587 | p != this->forced_locals_.end(); |
| 1588 | ++p) |
| 1589 | { |
| 1590 | Symbol* sym = *p; |
| 1591 | gold_assert(sym->is_forced_local()); |
| 1592 | if (this->sized_finalize_symbol<size>(sym)) |
| 1593 | { |
| 1594 | this->add_to_final_symtab<size>(sym, pool, &index, &off); |
| 1595 | ++*plocal_symcount; |
| 1596 | } |
| 1597 | } |
| 1598 | |
| 1599 | // Now do all the remaining symbols. |
| 1600 | for (Symbol_table_type::iterator p = this->table_.begin(); |
| 1601 | p != this->table_.end(); |
| 1602 | ++p) |
| 1603 | { |
| 1604 | Symbol* sym = p->second; |
| 1605 | if (this->sized_finalize_symbol<size>(sym)) |
| 1606 | this->add_to_final_symtab<size>(sym, pool, &index, &off); |
| 1607 | } |
| 1608 | |
| 1609 | this->output_count_ = index - orig_index; |
| 1610 | |
| 1611 | return off; |
| 1612 | } |
| 1613 | |
| 1614 | // Finalize the symbol SYM. This returns true if the symbol should be |
| 1615 | // added to the symbol table, false otherwise. |
| 1616 | |
| 1617 | template<int size> |
| 1618 | bool |
| 1619 | Symbol_table::sized_finalize_symbol(Symbol* unsized_sym) |
| 1620 | { |
| 1621 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym); |
| 1622 | |
| 1623 | // The default version of a symbol may appear twice in the symbol |
| 1624 | // table. We only need to finalize it once. |
| 1625 | if (sym->has_symtab_index()) |
| 1626 | return false; |
| 1627 | |
| 1628 | if (!sym->in_reg()) |
| 1629 | { |
| 1630 | gold_assert(!sym->has_symtab_index()); |
| 1631 | sym->set_symtab_index(-1U); |
| 1632 | gold_assert(sym->dynsym_index() == -1U); |
| 1633 | return false; |
| 1634 | } |
| 1635 | |
| 1636 | typename Sized_symbol<size>::Value_type value; |
| 1637 | |
| 1638 | switch (sym->source()) |
| 1639 | { |
| 1640 | case Symbol::FROM_OBJECT: |
| 1641 | { |
| 1642 | unsigned int shndx = sym->shndx(); |
| 1643 | |
| 1644 | // FIXME: We need some target specific support here. |
| 1645 | if (shndx >= elfcpp::SHN_LORESERVE |
| 1646 | && shndx != elfcpp::SHN_ABS) |
| 1647 | { |
| 1648 | gold_error(_("%s: unsupported symbol section 0x%x"), |
| 1649 | sym->demangled_name().c_str(), shndx); |
| 1650 | shndx = elfcpp::SHN_UNDEF; |
| 1651 | } |
| 1652 | |
| 1653 | Object* symobj = sym->object(); |
| 1654 | if (symobj->is_dynamic()) |
| 1655 | { |
| 1656 | value = 0; |
| 1657 | shndx = elfcpp::SHN_UNDEF; |
| 1658 | } |
| 1659 | else if (shndx == elfcpp::SHN_UNDEF) |
| 1660 | value = 0; |
| 1661 | else if (shndx == elfcpp::SHN_ABS) |
| 1662 | value = sym->value(); |
| 1663 | else |
| 1664 | { |
| 1665 | Relobj* relobj = static_cast<Relobj*>(symobj); |
| 1666 | section_offset_type secoff; |
| 1667 | Output_section* os = relobj->output_section(shndx, &secoff); |
| 1668 | |
| 1669 | if (os == NULL) |
| 1670 | { |
| 1671 | sym->set_symtab_index(-1U); |
| 1672 | gold_assert(sym->dynsym_index() == -1U); |
| 1673 | return false; |
| 1674 | } |
| 1675 | |
| 1676 | if (sym->type() == elfcpp::STT_TLS) |
| 1677 | value = sym->value() + os->tls_offset() + secoff; |
| 1678 | else |
| 1679 | value = sym->value() + os->address() + secoff; |
| 1680 | } |
| 1681 | } |
| 1682 | break; |
| 1683 | |
| 1684 | case Symbol::IN_OUTPUT_DATA: |
| 1685 | { |
| 1686 | Output_data* od = sym->output_data(); |
| 1687 | value = sym->value() + od->address(); |
| 1688 | if (sym->offset_is_from_end()) |
| 1689 | value += od->data_size(); |
| 1690 | } |
| 1691 | break; |
| 1692 | |
| 1693 | case Symbol::IN_OUTPUT_SEGMENT: |
| 1694 | { |
| 1695 | Output_segment* os = sym->output_segment(); |
| 1696 | value = sym->value() + os->vaddr(); |
| 1697 | switch (sym->offset_base()) |
| 1698 | { |
| 1699 | case Symbol::SEGMENT_START: |
| 1700 | break; |
| 1701 | case Symbol::SEGMENT_END: |
| 1702 | value += os->memsz(); |
| 1703 | break; |
| 1704 | case Symbol::SEGMENT_BSS: |
| 1705 | value += os->filesz(); |
| 1706 | break; |
| 1707 | default: |
| 1708 | gold_unreachable(); |
| 1709 | } |
| 1710 | } |
| 1711 | break; |
| 1712 | |
| 1713 | case Symbol::CONSTANT: |
| 1714 | value = sym->value(); |
| 1715 | break; |
| 1716 | |
| 1717 | default: |
| 1718 | gold_unreachable(); |
| 1719 | } |
| 1720 | |
| 1721 | sym->set_value(value); |
| 1722 | |
| 1723 | if (parameters->strip_all()) |
| 1724 | { |
| 1725 | sym->set_symtab_index(-1U); |
| 1726 | return false; |
| 1727 | } |
| 1728 | |
| 1729 | return true; |
| 1730 | } |
| 1731 | |
| 1732 | // Write out the global symbols. |
| 1733 | |
| 1734 | void |
| 1735 | Symbol_table::write_globals(const Input_objects* input_objects, |
| 1736 | const Stringpool* sympool, |
| 1737 | const Stringpool* dynpool, Output_file* of) const |
| 1738 | { |
| 1739 | if (parameters->get_size() == 32) |
| 1740 | { |
| 1741 | if (parameters->is_big_endian()) |
| 1742 | { |
| 1743 | #ifdef HAVE_TARGET_32_BIG |
| 1744 | this->sized_write_globals<32, true>(input_objects, sympool, |
| 1745 | dynpool, of); |
| 1746 | #else |
| 1747 | gold_unreachable(); |
| 1748 | #endif |
| 1749 | } |
| 1750 | else |
| 1751 | { |
| 1752 | #ifdef HAVE_TARGET_32_LITTLE |
| 1753 | this->sized_write_globals<32, false>(input_objects, sympool, |
| 1754 | dynpool, of); |
| 1755 | #else |
| 1756 | gold_unreachable(); |
| 1757 | #endif |
| 1758 | } |
| 1759 | } |
| 1760 | else if (parameters->get_size() == 64) |
| 1761 | { |
| 1762 | if (parameters->is_big_endian()) |
| 1763 | { |
| 1764 | #ifdef HAVE_TARGET_64_BIG |
| 1765 | this->sized_write_globals<64, true>(input_objects, sympool, |
| 1766 | dynpool, of); |
| 1767 | #else |
| 1768 | gold_unreachable(); |
| 1769 | #endif |
| 1770 | } |
| 1771 | else |
| 1772 | { |
| 1773 | #ifdef HAVE_TARGET_64_LITTLE |
| 1774 | this->sized_write_globals<64, false>(input_objects, sympool, |
| 1775 | dynpool, of); |
| 1776 | #else |
| 1777 | gold_unreachable(); |
| 1778 | #endif |
| 1779 | } |
| 1780 | } |
| 1781 | else |
| 1782 | gold_unreachable(); |
| 1783 | } |
| 1784 | |
| 1785 | // Write out the global symbols. |
| 1786 | |
| 1787 | template<int size, bool big_endian> |
| 1788 | void |
| 1789 | Symbol_table::sized_write_globals(const Input_objects* input_objects, |
| 1790 | const Stringpool* sympool, |
| 1791 | const Stringpool* dynpool, |
| 1792 | Output_file* of) const |
| 1793 | { |
| 1794 | const Target* const target = input_objects->target(); |
| 1795 | |
| 1796 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 1797 | |
| 1798 | const unsigned int output_count = this->output_count_; |
| 1799 | const section_size_type oview_size = output_count * sym_size; |
| 1800 | const unsigned int first_global_index = this->first_global_index_; |
| 1801 | unsigned char* const psyms = of->get_output_view(this->offset_, oview_size); |
| 1802 | |
| 1803 | const unsigned int dynamic_count = this->dynamic_count_; |
| 1804 | const section_size_type dynamic_size = dynamic_count * sym_size; |
| 1805 | const unsigned int first_dynamic_global_index = |
| 1806 | this->first_dynamic_global_index_; |
| 1807 | unsigned char* dynamic_view; |
| 1808 | if (this->dynamic_offset_ == 0) |
| 1809 | dynamic_view = NULL; |
| 1810 | else |
| 1811 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); |
| 1812 | |
| 1813 | for (Symbol_table_type::const_iterator p = this->table_.begin(); |
| 1814 | p != this->table_.end(); |
| 1815 | ++p) |
| 1816 | { |
| 1817 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); |
| 1818 | |
| 1819 | // Possibly warn about unresolved symbols in shared libraries. |
| 1820 | this->warn_about_undefined_dynobj_symbol(input_objects, sym); |
| 1821 | |
| 1822 | unsigned int sym_index = sym->symtab_index(); |
| 1823 | unsigned int dynsym_index; |
| 1824 | if (dynamic_view == NULL) |
| 1825 | dynsym_index = -1U; |
| 1826 | else |
| 1827 | dynsym_index = sym->dynsym_index(); |
| 1828 | |
| 1829 | if (sym_index == -1U && dynsym_index == -1U) |
| 1830 | { |
| 1831 | // This symbol is not included in the output file. |
| 1832 | continue; |
| 1833 | } |
| 1834 | |
| 1835 | unsigned int shndx; |
| 1836 | typename elfcpp::Elf_types<32>::Elf_Addr value = sym->value(); |
| 1837 | switch (sym->source()) |
| 1838 | { |
| 1839 | case Symbol::FROM_OBJECT: |
| 1840 | { |
| 1841 | unsigned int in_shndx = sym->shndx(); |
| 1842 | |
| 1843 | // FIXME: We need some target specific support here. |
| 1844 | if (in_shndx >= elfcpp::SHN_LORESERVE |
| 1845 | && in_shndx != elfcpp::SHN_ABS) |
| 1846 | { |
| 1847 | gold_error(_("%s: unsupported symbol section 0x%x"), |
| 1848 | sym->demangled_name().c_str(), in_shndx); |
| 1849 | shndx = in_shndx; |
| 1850 | } |
| 1851 | else |
| 1852 | { |
| 1853 | Object* symobj = sym->object(); |
| 1854 | if (symobj->is_dynamic()) |
| 1855 | { |
| 1856 | if (sym->needs_dynsym_value()) |
| 1857 | value = target->dynsym_value(sym); |
| 1858 | shndx = elfcpp::SHN_UNDEF; |
| 1859 | } |
| 1860 | else if (in_shndx == elfcpp::SHN_UNDEF |
| 1861 | || in_shndx == elfcpp::SHN_ABS) |
| 1862 | shndx = in_shndx; |
| 1863 | else |
| 1864 | { |
| 1865 | Relobj* relobj = static_cast<Relobj*>(symobj); |
| 1866 | section_offset_type secoff; |
| 1867 | Output_section* os = relobj->output_section(in_shndx, |
| 1868 | &secoff); |
| 1869 | gold_assert(os != NULL); |
| 1870 | shndx = os->out_shndx(); |
| 1871 | } |
| 1872 | } |
| 1873 | } |
| 1874 | break; |
| 1875 | |
| 1876 | case Symbol::IN_OUTPUT_DATA: |
| 1877 | shndx = sym->output_data()->out_shndx(); |
| 1878 | break; |
| 1879 | |
| 1880 | case Symbol::IN_OUTPUT_SEGMENT: |
| 1881 | shndx = elfcpp::SHN_ABS; |
| 1882 | break; |
| 1883 | |
| 1884 | case Symbol::CONSTANT: |
| 1885 | shndx = elfcpp::SHN_ABS; |
| 1886 | break; |
| 1887 | |
| 1888 | default: |
| 1889 | gold_unreachable(); |
| 1890 | } |
| 1891 | |
| 1892 | if (sym_index != -1U) |
| 1893 | { |
| 1894 | sym_index -= first_global_index; |
| 1895 | gold_assert(sym_index < output_count); |
| 1896 | unsigned char* ps = psyms + (sym_index * sym_size); |
| 1897 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
| 1898 | sym, sym->value(), shndx, sympool, ps |
| 1899 | SELECT_SIZE_ENDIAN(size, big_endian)); |
| 1900 | } |
| 1901 | |
| 1902 | if (dynsym_index != -1U) |
| 1903 | { |
| 1904 | dynsym_index -= first_dynamic_global_index; |
| 1905 | gold_assert(dynsym_index < dynamic_count); |
| 1906 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); |
| 1907 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
| 1908 | sym, value, shndx, dynpool, pd |
| 1909 | SELECT_SIZE_ENDIAN(size, big_endian)); |
| 1910 | } |
| 1911 | } |
| 1912 | |
| 1913 | of->write_output_view(this->offset_, oview_size, psyms); |
| 1914 | if (dynamic_view != NULL) |
| 1915 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); |
| 1916 | } |
| 1917 | |
| 1918 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the |
| 1919 | // strtab holding the name. |
| 1920 | |
| 1921 | template<int size, bool big_endian> |
| 1922 | void |
| 1923 | Symbol_table::sized_write_symbol( |
| 1924 | Sized_symbol<size>* sym, |
| 1925 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 1926 | unsigned int shndx, |
| 1927 | const Stringpool* pool, |
| 1928 | unsigned char* p |
| 1929 | ACCEPT_SIZE_ENDIAN) const |
| 1930 | { |
| 1931 | elfcpp::Sym_write<size, big_endian> osym(p); |
| 1932 | osym.put_st_name(pool->get_offset(sym->name())); |
| 1933 | osym.put_st_value(value); |
| 1934 | osym.put_st_size(sym->symsize()); |
| 1935 | // A version script may have overridden the default binding. |
| 1936 | if (sym->is_forced_local()) |
| 1937 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, sym->type())); |
| 1938 | else |
| 1939 | osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type())); |
| 1940 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); |
| 1941 | osym.put_st_shndx(shndx); |
| 1942 | } |
| 1943 | |
| 1944 | // Check for unresolved symbols in shared libraries. This is |
| 1945 | // controlled by the --allow-shlib-undefined option. |
| 1946 | |
| 1947 | // We only warn about libraries for which we have seen all the |
| 1948 | // DT_NEEDED entries. We don't try to track down DT_NEEDED entries |
| 1949 | // which were not seen in this link. If we didn't see a DT_NEEDED |
| 1950 | // entry, we aren't going to be able to reliably report whether the |
| 1951 | // symbol is undefined. |
| 1952 | |
| 1953 | // We also don't warn about libraries found in the system library |
| 1954 | // directory (the directory were we find libc.so); we assume that |
| 1955 | // those libraries are OK. This heuristic avoids problems in |
| 1956 | // GNU/Linux, in which -ldl can have undefined references satisfied by |
| 1957 | // ld-linux.so. |
| 1958 | |
| 1959 | inline void |
| 1960 | Symbol_table::warn_about_undefined_dynobj_symbol( |
| 1961 | const Input_objects* input_objects, |
| 1962 | Symbol* sym) const |
| 1963 | { |
| 1964 | if (sym->source() == Symbol::FROM_OBJECT |
| 1965 | && sym->object()->is_dynamic() |
| 1966 | && sym->shndx() == elfcpp::SHN_UNDEF |
| 1967 | && sym->binding() != elfcpp::STB_WEAK |
| 1968 | && !parameters->allow_shlib_undefined() |
| 1969 | && !input_objects->target()->is_defined_by_abi(sym) |
| 1970 | && !input_objects->found_in_system_library_directory(sym->object())) |
| 1971 | { |
| 1972 | // A very ugly cast. |
| 1973 | Dynobj* dynobj = static_cast<Dynobj*>(sym->object()); |
| 1974 | if (!dynobj->has_unknown_needed_entries()) |
| 1975 | gold_error(_("%s: undefined reference to '%s'"), |
| 1976 | sym->object()->name().c_str(), |
| 1977 | sym->demangled_name().c_str()); |
| 1978 | } |
| 1979 | } |
| 1980 | |
| 1981 | // Write out a section symbol. Return the update offset. |
| 1982 | |
| 1983 | void |
| 1984 | Symbol_table::write_section_symbol(const Output_section *os, |
| 1985 | Output_file* of, |
| 1986 | off_t offset) const |
| 1987 | { |
| 1988 | if (parameters->get_size() == 32) |
| 1989 | { |
| 1990 | if (parameters->is_big_endian()) |
| 1991 | { |
| 1992 | #ifdef HAVE_TARGET_32_BIG |
| 1993 | this->sized_write_section_symbol<32, true>(os, of, offset); |
| 1994 | #else |
| 1995 | gold_unreachable(); |
| 1996 | #endif |
| 1997 | } |
| 1998 | else |
| 1999 | { |
| 2000 | #ifdef HAVE_TARGET_32_LITTLE |
| 2001 | this->sized_write_section_symbol<32, false>(os, of, offset); |
| 2002 | #else |
| 2003 | gold_unreachable(); |
| 2004 | #endif |
| 2005 | } |
| 2006 | } |
| 2007 | else if (parameters->get_size() == 64) |
| 2008 | { |
| 2009 | if (parameters->is_big_endian()) |
| 2010 | { |
| 2011 | #ifdef HAVE_TARGET_64_BIG |
| 2012 | this->sized_write_section_symbol<64, true>(os, of, offset); |
| 2013 | #else |
| 2014 | gold_unreachable(); |
| 2015 | #endif |
| 2016 | } |
| 2017 | else |
| 2018 | { |
| 2019 | #ifdef HAVE_TARGET_64_LITTLE |
| 2020 | this->sized_write_section_symbol<64, false>(os, of, offset); |
| 2021 | #else |
| 2022 | gold_unreachable(); |
| 2023 | #endif |
| 2024 | } |
| 2025 | } |
| 2026 | else |
| 2027 | gold_unreachable(); |
| 2028 | } |
| 2029 | |
| 2030 | // Write out a section symbol, specialized for size and endianness. |
| 2031 | |
| 2032 | template<int size, bool big_endian> |
| 2033 | void |
| 2034 | Symbol_table::sized_write_section_symbol(const Output_section* os, |
| 2035 | Output_file* of, |
| 2036 | off_t offset) const |
| 2037 | { |
| 2038 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 2039 | |
| 2040 | unsigned char* pov = of->get_output_view(offset, sym_size); |
| 2041 | |
| 2042 | elfcpp::Sym_write<size, big_endian> osym(pov); |
| 2043 | osym.put_st_name(0); |
| 2044 | osym.put_st_value(os->address()); |
| 2045 | osym.put_st_size(0); |
| 2046 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, |
| 2047 | elfcpp::STT_SECTION)); |
| 2048 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); |
| 2049 | osym.put_st_shndx(os->out_shndx()); |
| 2050 | |
| 2051 | of->write_output_view(offset, sym_size, pov); |
| 2052 | } |
| 2053 | |
| 2054 | // Print statistical information to stderr. This is used for --stats. |
| 2055 | |
| 2056 | void |
| 2057 | Symbol_table::print_stats() const |
| 2058 | { |
| 2059 | #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP) |
| 2060 | fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"), |
| 2061 | program_name, this->table_.size(), this->table_.bucket_count()); |
| 2062 | #else |
| 2063 | fprintf(stderr, _("%s: symbol table entries: %zu\n"), |
| 2064 | program_name, this->table_.size()); |
| 2065 | #endif |
| 2066 | this->namepool_.print_stats("symbol table stringpool"); |
| 2067 | } |
| 2068 | |
| 2069 | // We check for ODR violations by looking for symbols with the same |
| 2070 | // name for which the debugging information reports that they were |
| 2071 | // defined in different source locations. When comparing the source |
| 2072 | // location, we consider instances with the same base filename and |
| 2073 | // line number to be the same. This is because different object |
| 2074 | // files/shared libraries can include the same header file using |
| 2075 | // different paths, and we don't want to report an ODR violation in |
| 2076 | // that case. |
| 2077 | |
| 2078 | // This struct is used to compare line information, as returned by |
| 2079 | // Dwarf_line_info::one_addr2line. It implements a < comparison |
| 2080 | // operator used with std::set. |
| 2081 | |
| 2082 | struct Odr_violation_compare |
| 2083 | { |
| 2084 | bool |
| 2085 | operator()(const std::string& s1, const std::string& s2) const |
| 2086 | { |
| 2087 | std::string::size_type pos1 = s1.rfind('/'); |
| 2088 | std::string::size_type pos2 = s2.rfind('/'); |
| 2089 | if (pos1 == std::string::npos |
| 2090 | || pos2 == std::string::npos) |
| 2091 | return s1 < s2; |
| 2092 | return s1.compare(pos1, std::string::npos, |
| 2093 | s2, pos2, std::string::npos) < 0; |
| 2094 | } |
| 2095 | }; |
| 2096 | |
| 2097 | // Check candidate_odr_violations_ to find symbols with the same name |
| 2098 | // but apparently different definitions (different source-file/line-no). |
| 2099 | |
| 2100 | void |
| 2101 | Symbol_table::detect_odr_violations(const Task* task, |
| 2102 | const char* output_file_name) const |
| 2103 | { |
| 2104 | for (Odr_map::const_iterator it = candidate_odr_violations_.begin(); |
| 2105 | it != candidate_odr_violations_.end(); |
| 2106 | ++it) |
| 2107 | { |
| 2108 | const char* symbol_name = it->first; |
| 2109 | // We use a sorted set so the output is deterministic. |
| 2110 | std::set<std::string, Odr_violation_compare> line_nums; |
| 2111 | |
| 2112 | for (Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator |
| 2113 | locs = it->second.begin(); |
| 2114 | locs != it->second.end(); |
| 2115 | ++locs) |
| 2116 | { |
| 2117 | // We need to lock the object in order to read it. This |
| 2118 | // means that we have to run in a singleton Task. If we |
| 2119 | // want to run this in a general Task for better |
| 2120 | // performance, we will need one Task for object, plus |
| 2121 | // appropriate locking to ensure that we don't conflict with |
| 2122 | // other uses of the object. |
| 2123 | Task_lock_obj<Object> tl(task, locs->object); |
| 2124 | std::string lineno = Dwarf_line_info::one_addr2line( |
| 2125 | locs->object, locs->shndx, locs->offset); |
| 2126 | if (!lineno.empty()) |
| 2127 | line_nums.insert(lineno); |
| 2128 | } |
| 2129 | |
| 2130 | if (line_nums.size() > 1) |
| 2131 | { |
| 2132 | gold_warning(_("while linking %s: symbol '%s' defined in multiple " |
| 2133 | "places (possible ODR violation):"), |
| 2134 | output_file_name, demangle(symbol_name).c_str()); |
| 2135 | for (std::set<std::string>::const_iterator it2 = line_nums.begin(); |
| 2136 | it2 != line_nums.end(); |
| 2137 | ++it2) |
| 2138 | fprintf(stderr, " %s\n", it2->c_str()); |
| 2139 | } |
| 2140 | } |
| 2141 | } |
| 2142 | |
| 2143 | // Warnings functions. |
| 2144 | |
| 2145 | // Add a new warning. |
| 2146 | |
| 2147 | void |
| 2148 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, |
| 2149 | const std::string& warning) |
| 2150 | { |
| 2151 | name = symtab->canonicalize_name(name); |
| 2152 | this->warnings_[name].set(obj, warning); |
| 2153 | } |
| 2154 | |
| 2155 | // Look through the warnings and mark the symbols for which we should |
| 2156 | // warn. This is called during Layout::finalize when we know the |
| 2157 | // sources for all the symbols. |
| 2158 | |
| 2159 | void |
| 2160 | Warnings::note_warnings(Symbol_table* symtab) |
| 2161 | { |
| 2162 | for (Warning_table::iterator p = this->warnings_.begin(); |
| 2163 | p != this->warnings_.end(); |
| 2164 | ++p) |
| 2165 | { |
| 2166 | Symbol* sym = symtab->lookup(p->first, NULL); |
| 2167 | if (sym != NULL |
| 2168 | && sym->source() == Symbol::FROM_OBJECT |
| 2169 | && sym->object() == p->second.object) |
| 2170 | sym->set_has_warning(); |
| 2171 | } |
| 2172 | } |
| 2173 | |
| 2174 | // Issue a warning. This is called when we see a relocation against a |
| 2175 | // symbol for which has a warning. |
| 2176 | |
| 2177 | template<int size, bool big_endian> |
| 2178 | void |
| 2179 | Warnings::issue_warning(const Symbol* sym, |
| 2180 | const Relocate_info<size, big_endian>* relinfo, |
| 2181 | size_t relnum, off_t reloffset) const |
| 2182 | { |
| 2183 | gold_assert(sym->has_warning()); |
| 2184 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
| 2185 | gold_assert(p != this->warnings_.end()); |
| 2186 | gold_warning_at_location(relinfo, relnum, reloffset, |
| 2187 | "%s", p->second.text.c_str()); |
| 2188 | } |
| 2189 | |
| 2190 | // Instantiate the templates we need. We could use the configure |
| 2191 | // script to restrict this to only the ones needed for implemented |
| 2192 | // targets. |
| 2193 | |
| 2194 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 2195 | template |
| 2196 | void |
| 2197 | Sized_symbol<32>::allocate_common(Output_data*, Value_type); |
| 2198 | #endif |
| 2199 | |
| 2200 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 2201 | template |
| 2202 | void |
| 2203 | Sized_symbol<64>::allocate_common(Output_data*, Value_type); |
| 2204 | #endif |
| 2205 | |
| 2206 | #ifdef HAVE_TARGET_32_LITTLE |
| 2207 | template |
| 2208 | void |
| 2209 | Symbol_table::add_from_relobj<32, false>( |
| 2210 | Sized_relobj<32, false>* relobj, |
| 2211 | const unsigned char* syms, |
| 2212 | size_t count, |
| 2213 | const char* sym_names, |
| 2214 | size_t sym_name_size, |
| 2215 | Sized_relobj<32, true>::Symbols* sympointers); |
| 2216 | #endif |
| 2217 | |
| 2218 | #ifdef HAVE_TARGET_32_BIG |
| 2219 | template |
| 2220 | void |
| 2221 | Symbol_table::add_from_relobj<32, true>( |
| 2222 | Sized_relobj<32, true>* relobj, |
| 2223 | const unsigned char* syms, |
| 2224 | size_t count, |
| 2225 | const char* sym_names, |
| 2226 | size_t sym_name_size, |
| 2227 | Sized_relobj<32, false>::Symbols* sympointers); |
| 2228 | #endif |
| 2229 | |
| 2230 | #ifdef HAVE_TARGET_64_LITTLE |
| 2231 | template |
| 2232 | void |
| 2233 | Symbol_table::add_from_relobj<64, false>( |
| 2234 | Sized_relobj<64, false>* relobj, |
| 2235 | const unsigned char* syms, |
| 2236 | size_t count, |
| 2237 | const char* sym_names, |
| 2238 | size_t sym_name_size, |
| 2239 | Sized_relobj<64, true>::Symbols* sympointers); |
| 2240 | #endif |
| 2241 | |
| 2242 | #ifdef HAVE_TARGET_64_BIG |
| 2243 | template |
| 2244 | void |
| 2245 | Symbol_table::add_from_relobj<64, true>( |
| 2246 | Sized_relobj<64, true>* relobj, |
| 2247 | const unsigned char* syms, |
| 2248 | size_t count, |
| 2249 | const char* sym_names, |
| 2250 | size_t sym_name_size, |
| 2251 | Sized_relobj<64, false>::Symbols* sympointers); |
| 2252 | #endif |
| 2253 | |
| 2254 | #ifdef HAVE_TARGET_32_LITTLE |
| 2255 | template |
| 2256 | void |
| 2257 | Symbol_table::add_from_dynobj<32, false>( |
| 2258 | Sized_dynobj<32, false>* dynobj, |
| 2259 | const unsigned char* syms, |
| 2260 | size_t count, |
| 2261 | const char* sym_names, |
| 2262 | size_t sym_name_size, |
| 2263 | const unsigned char* versym, |
| 2264 | size_t versym_size, |
| 2265 | const std::vector<const char*>* version_map); |
| 2266 | #endif |
| 2267 | |
| 2268 | #ifdef HAVE_TARGET_32_BIG |
| 2269 | template |
| 2270 | void |
| 2271 | Symbol_table::add_from_dynobj<32, true>( |
| 2272 | Sized_dynobj<32, true>* dynobj, |
| 2273 | const unsigned char* syms, |
| 2274 | size_t count, |
| 2275 | const char* sym_names, |
| 2276 | size_t sym_name_size, |
| 2277 | const unsigned char* versym, |
| 2278 | size_t versym_size, |
| 2279 | const std::vector<const char*>* version_map); |
| 2280 | #endif |
| 2281 | |
| 2282 | #ifdef HAVE_TARGET_64_LITTLE |
| 2283 | template |
| 2284 | void |
| 2285 | Symbol_table::add_from_dynobj<64, false>( |
| 2286 | Sized_dynobj<64, false>* dynobj, |
| 2287 | const unsigned char* syms, |
| 2288 | size_t count, |
| 2289 | const char* sym_names, |
| 2290 | size_t sym_name_size, |
| 2291 | const unsigned char* versym, |
| 2292 | size_t versym_size, |
| 2293 | const std::vector<const char*>* version_map); |
| 2294 | #endif |
| 2295 | |
| 2296 | #ifdef HAVE_TARGET_64_BIG |
| 2297 | template |
| 2298 | void |
| 2299 | Symbol_table::add_from_dynobj<64, true>( |
| 2300 | Sized_dynobj<64, true>* dynobj, |
| 2301 | const unsigned char* syms, |
| 2302 | size_t count, |
| 2303 | const char* sym_names, |
| 2304 | size_t sym_name_size, |
| 2305 | const unsigned char* versym, |
| 2306 | size_t versym_size, |
| 2307 | const std::vector<const char*>* version_map); |
| 2308 | #endif |
| 2309 | |
| 2310 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 2311 | template |
| 2312 | void |
| 2313 | Symbol_table::define_with_copy_reloc<32>( |
| 2314 | Sized_symbol<32>* sym, |
| 2315 | Output_data* posd, |
| 2316 | elfcpp::Elf_types<32>::Elf_Addr value); |
| 2317 | #endif |
| 2318 | |
| 2319 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 2320 | template |
| 2321 | void |
| 2322 | Symbol_table::define_with_copy_reloc<64>( |
| 2323 | Sized_symbol<64>* sym, |
| 2324 | Output_data* posd, |
| 2325 | elfcpp::Elf_types<64>::Elf_Addr value); |
| 2326 | #endif |
| 2327 | |
| 2328 | #ifdef HAVE_TARGET_32_LITTLE |
| 2329 | template |
| 2330 | void |
| 2331 | Warnings::issue_warning<32, false>(const Symbol* sym, |
| 2332 | const Relocate_info<32, false>* relinfo, |
| 2333 | size_t relnum, off_t reloffset) const; |
| 2334 | #endif |
| 2335 | |
| 2336 | #ifdef HAVE_TARGET_32_BIG |
| 2337 | template |
| 2338 | void |
| 2339 | Warnings::issue_warning<32, true>(const Symbol* sym, |
| 2340 | const Relocate_info<32, true>* relinfo, |
| 2341 | size_t relnum, off_t reloffset) const; |
| 2342 | #endif |
| 2343 | |
| 2344 | #ifdef HAVE_TARGET_64_LITTLE |
| 2345 | template |
| 2346 | void |
| 2347 | Warnings::issue_warning<64, false>(const Symbol* sym, |
| 2348 | const Relocate_info<64, false>* relinfo, |
| 2349 | size_t relnum, off_t reloffset) const; |
| 2350 | #endif |
| 2351 | |
| 2352 | #ifdef HAVE_TARGET_64_BIG |
| 2353 | template |
| 2354 | void |
| 2355 | Warnings::issue_warning<64, true>(const Symbol* sym, |
| 2356 | const Relocate_info<64, true>* relinfo, |
| 2357 | size_t relnum, off_t reloffset) const; |
| 2358 | #endif |
| 2359 | |
| 2360 | } // End namespace gold. |