1 // resolve.cc -- symbol resolution for gold
3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
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.
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.
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.
33 // Symbol methods used in this file.
35 // Override the fields in Symbol.
37 template<int size, bool big_endian>
39 Symbol::override_base(const elfcpp::Sym<size, big_endian>& sym,
40 Object* object, const char* version)
42 gold_assert(this->source_ == FROM_OBJECT);
43 this->u_.from_object.object = object;
44 if (version != NULL && this->version() != version)
46 gold_assert(this->version() == NULL);
47 this->version_ = version;
49 // FIXME: Handle SHN_XINDEX.
50 this->u_.from_object.shndx = sym.get_st_shndx();
51 this->type_ = sym.get_st_type();
52 this->binding_ = sym.get_st_bind();
53 this->visibility_ = sym.get_st_visibility();
54 this->nonvis_ = sym.get_st_nonvis();
55 if (object->is_dynamic())
61 // Override the fields in Sized_symbol.
64 template<bool big_endian>
66 Sized_symbol<size>::override(const elfcpp::Sym<size, big_endian>& sym,
67 Object* object, const char* version)
69 this->override_base(sym, object, version);
70 this->value_ = sym.get_st_value();
71 this->symsize_ = sym.get_st_size();
74 // Override TOSYM with symbol FROMSYM, defined in OBJECT, with version
75 // VERSION. This handles all aliases of TOSYM.
77 template<int size, bool big_endian>
79 Symbol_table::override(Sized_symbol<size>* tosym,
80 const elfcpp::Sym<size, big_endian>& fromsym,
81 Object* object, const char* version)
83 tosym->override(fromsym, object, version);
84 if (tosym->has_alias())
86 Symbol* sym = this->weak_aliases_[tosym];
87 gold_assert(sym != NULL);
88 Sized_symbol<size>* ssym;
89 ssym = this->get_sized_symbol SELECT_SIZE_NAME(size) (sym
93 ssym->override(fromsym, object, version);
94 sym = this->weak_aliases_[ssym];
95 gold_assert(sym != NULL);
96 ssym = this->get_sized_symbol SELECT_SIZE_NAME(size) (
97 sym SELECT_SIZE(size));
99 while (ssym != tosym);
103 // The resolve functions build a little code for each symbol.
104 // Bit 0: 0 for global, 1 for weak.
105 // Bit 1: 0 for regular object, 1 for shared object
106 // Bits 2-3: 0 for normal, 1 for undefined, 2 for common
107 // This gives us values from 0 to 11.
109 static const int global_or_weak_shift = 0;
110 static const unsigned int global_flag = 0 << global_or_weak_shift;
111 static const unsigned int weak_flag = 1 << global_or_weak_shift;
113 static const int regular_or_dynamic_shift = 1;
114 static const unsigned int regular_flag = 0 << regular_or_dynamic_shift;
115 static const unsigned int dynamic_flag = 1 << regular_or_dynamic_shift;
117 static const int def_undef_or_common_shift = 2;
118 static const unsigned int def_flag = 0 << def_undef_or_common_shift;
119 static const unsigned int undef_flag = 1 << def_undef_or_common_shift;
120 static const unsigned int common_flag = 2 << def_undef_or_common_shift;
122 // This convenience function combines all the flags based on facts
126 symbol_to_bits(elfcpp::STB binding, bool is_dynamic,
127 unsigned int shndx, elfcpp::STT type)
133 case elfcpp::STB_GLOBAL:
137 case elfcpp::STB_WEAK:
141 case elfcpp::STB_LOCAL:
142 // We should only see externally visible symbols in the symbol
144 gold_error(_("invalid STB_LOCAL symbol in external symbols"));
148 // Any target which wants to handle STB_LOOS, etc., needs to
149 // define a resolve method.
150 gold_error(_("unsupported symbol binding"));
155 bits |= dynamic_flag;
157 bits |= regular_flag;
161 case elfcpp::SHN_UNDEF:
165 case elfcpp::SHN_COMMON:
170 if (type == elfcpp::STT_COMMON)
180 // Resolve a symbol. This is called the second and subsequent times
181 // we see a symbol. TO is the pre-existing symbol. ORIG_SYM is the
182 // new symbol, seen in OBJECT. SYM is almost always identical to
183 // ORIG_SYM, but may be munged (for instance, if we determine the
184 // symbol is in a to-be-discarded section, we'll set sym's shndx to
185 // UNDEFINED). VERSION of the version of SYM.
187 template<int size, bool big_endian>
189 Symbol_table::resolve(Sized_symbol<size>* to,
190 const elfcpp::Sym<size, big_endian>& sym,
191 const elfcpp::Sym<size, big_endian>& orig_sym,
192 Object* object, const char* version)
194 if (object->target()->has_resolve())
196 Sized_target<size, big_endian>* sized_target;
197 sized_target = object->sized_target
198 SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
199 SELECT_SIZE_ENDIAN_ONLY(size, big_endian));
200 sized_target->resolve(to, sym, object, version);
204 if (!object->is_dynamic())
206 // Record that we've seen this symbol in a regular object.
211 // Record that we've seen this symbol in a dynamic object.
215 unsigned int frombits = symbol_to_bits(sym.get_st_bind(),
216 object->is_dynamic(),
220 bool adjust_common_sizes;
221 if (Symbol_table::should_override(to, frombits, object,
222 &adjust_common_sizes))
224 typename Sized_symbol<size>::Size_type tosize = to->symsize();
226 this->override(to, sym, object, version);
228 if (adjust_common_sizes && tosize > to->symsize())
229 to->set_symsize(tosize);
233 if (adjust_common_sizes && sym.get_st_size() > to->symsize())
234 to->set_symsize(sym.get_st_size());
237 // A new weak undefined reference, merging with an old weak
238 // reference, could be a One Definition Rule (ODR) violation --
239 // especially if the types or sizes of the references differ. We'll
240 // store such pairs and look them up later to make sure they
241 // actually refer to the same lines of code. (Note: not all ODR
242 // violations can be found this way, and not everything this finds
243 // is an ODR violation. But it's helpful to warn about.)
244 // We use orig_sym here because we want the symbol exactly as it
245 // appears in the object file, not munged via our future processing.
246 if (parameters->options().detect_odr_violations()
247 && orig_sym.get_st_bind() == elfcpp::STB_WEAK
248 && to->binding() == elfcpp::STB_WEAK
249 && orig_sym.get_st_shndx() != elfcpp::SHN_UNDEF
250 && to->shndx() != elfcpp::SHN_UNDEF
251 && orig_sym.get_st_size() != 0 // Ignore weird 0-sized symbols.
252 && to->symsize() != 0
253 && (orig_sym.get_st_type() != to->type()
254 || orig_sym.get_st_size() != to->symsize())
255 // C does not have a concept of ODR, so we only need to do this
256 // on C++ symbols. These have (mangled) names starting with _Z.
257 && to->name()[0] == '_' && to->name()[1] == 'Z')
259 Symbol_location fromloc
260 = { object, orig_sym.get_st_shndx(), orig_sym.get_st_value() };
261 Symbol_location toloc = { to->object(), to->shndx(), to->value() };
262 this->candidate_odr_violations_[to->name()].insert(fromloc);
263 this->candidate_odr_violations_[to->name()].insert(toloc);
267 // Handle the core of symbol resolution. This is called with the
268 // existing symbol, TO, and a bitflag describing the new symbol. This
269 // returns true if we should override the existing symbol with the new
270 // one, and returns false otherwise. It sets *ADJUST_COMMON_SIZES to
271 // true if we should set the symbol size to the maximum of the TO and
272 // FROM sizes. It handles error conditions.
275 Symbol_table::should_override(const Symbol* to, unsigned int frombits,
276 Object* object, bool* adjust_common_sizes)
278 *adjust_common_sizes = false;
281 if (to->source() == Symbol::FROM_OBJECT)
282 tobits = symbol_to_bits(to->binding(),
283 to->object()->is_dynamic(),
287 tobits = symbol_to_bits(to->binding(), false, elfcpp::SHN_ABS,
290 // FIXME: Warn if either but not both of TO and SYM are STT_TLS.
292 // We use a giant switch table for symbol resolution. This code is
293 // unwieldy, but: 1) it is efficient; 2) we definitely handle all
294 // cases; 3) it is easy to change the handling of a particular case.
295 // The alternative would be a series of conditionals, but it is easy
296 // to get the ordering wrong. This could also be done as a table,
297 // but that is no easier to understand than this large switch
300 // These are the values generated by the bit codes.
303 DEF = global_flag | regular_flag | def_flag,
304 WEAK_DEF = weak_flag | regular_flag | def_flag,
305 DYN_DEF = global_flag | dynamic_flag | def_flag,
306 DYN_WEAK_DEF = weak_flag | dynamic_flag | def_flag,
307 UNDEF = global_flag | regular_flag | undef_flag,
308 WEAK_UNDEF = weak_flag | regular_flag | undef_flag,
309 DYN_UNDEF = global_flag | dynamic_flag | undef_flag,
310 DYN_WEAK_UNDEF = weak_flag | dynamic_flag | undef_flag,
311 COMMON = global_flag | regular_flag | common_flag,
312 WEAK_COMMON = weak_flag | regular_flag | common_flag,
313 DYN_COMMON = global_flag | dynamic_flag | common_flag,
314 DYN_WEAK_COMMON = weak_flag | dynamic_flag | common_flag
317 switch (tobits * 16 + frombits)
320 // Two definitions of the same symbol.
322 // If either symbol is defined by an object included using
323 // --just-symbols, then don't warn. This is for compatibility
324 // with the GNU linker. FIXME: This is a hack.
325 if ((to->source() == Symbol::FROM_OBJECT && to->object()->just_symbols())
326 || object->just_symbols())
329 // FIXME: Do a better job of reporting locations.
330 gold_error(_("%s: multiple definition of %s"),
331 object != NULL ? object->name().c_str() : _("command line"),
332 to->demangled_name().c_str());
333 gold_error(_("%s: previous definition here"),
334 (to->source() == Symbol::FROM_OBJECT
335 ? to->object()->name().c_str()
336 : _("command line")));
339 case WEAK_DEF * 16 + DEF:
340 // We've seen a weak definition, and now we see a strong
341 // definition. In the original SVR4 linker, this was treated as
342 // a multiple definition error. In the Solaris linker and the
343 // GNU linker, a weak definition followed by a regular
344 // definition causes the weak definition to be overridden. We
345 // are currently compatible with the GNU linker. In the future
346 // we should add a target specific option to change this.
350 case DYN_DEF * 16 + DEF:
351 case DYN_WEAK_DEF * 16 + DEF:
352 // We've seen a definition in a dynamic object, and now we see a
353 // definition in a regular object. The definition in the
354 // regular object overrides the definition in the dynamic
358 case UNDEF * 16 + DEF:
359 case WEAK_UNDEF * 16 + DEF:
360 case DYN_UNDEF * 16 + DEF:
361 case DYN_WEAK_UNDEF * 16 + DEF:
362 // We've seen an undefined reference, and now we see a
363 // definition. We use the definition.
366 case COMMON * 16 + DEF:
367 case WEAK_COMMON * 16 + DEF:
368 case DYN_COMMON * 16 + DEF:
369 case DYN_WEAK_COMMON * 16 + DEF:
370 // We've seen a common symbol and now we see a definition. The
371 // definition overrides. FIXME: We should optionally issue, version a
375 case DEF * 16 + WEAK_DEF:
376 case WEAK_DEF * 16 + WEAK_DEF:
377 // We've seen a definition and now we see a weak definition. We
378 // ignore the new weak definition.
381 case DYN_DEF * 16 + WEAK_DEF:
382 case DYN_WEAK_DEF * 16 + WEAK_DEF:
383 // We've seen a dynamic definition and now we see a regular weak
384 // definition. The regular weak definition overrides.
387 case UNDEF * 16 + WEAK_DEF:
388 case WEAK_UNDEF * 16 + WEAK_DEF:
389 case DYN_UNDEF * 16 + WEAK_DEF:
390 case DYN_WEAK_UNDEF * 16 + WEAK_DEF:
391 // A weak definition of a currently undefined symbol.
394 case COMMON * 16 + WEAK_DEF:
395 case WEAK_COMMON * 16 + WEAK_DEF:
396 // A weak definition does not override a common definition.
399 case DYN_COMMON * 16 + WEAK_DEF:
400 case DYN_WEAK_COMMON * 16 + WEAK_DEF:
401 // A weak definition does override a definition in a dynamic
402 // object. FIXME: We should optionally issue a warning.
405 case DEF * 16 + DYN_DEF:
406 case WEAK_DEF * 16 + DYN_DEF:
407 case DYN_DEF * 16 + DYN_DEF:
408 case DYN_WEAK_DEF * 16 + DYN_DEF:
409 // Ignore a dynamic definition if we already have a definition.
412 case UNDEF * 16 + DYN_DEF:
413 case WEAK_UNDEF * 16 + DYN_DEF:
414 case DYN_UNDEF * 16 + DYN_DEF:
415 case DYN_WEAK_UNDEF * 16 + DYN_DEF:
416 // Use a dynamic definition if we have a reference.
419 case COMMON * 16 + DYN_DEF:
420 case WEAK_COMMON * 16 + DYN_DEF:
421 case DYN_COMMON * 16 + DYN_DEF:
422 case DYN_WEAK_COMMON * 16 + DYN_DEF:
423 // Ignore a dynamic definition if we already have a common
427 case DEF * 16 + DYN_WEAK_DEF:
428 case WEAK_DEF * 16 + DYN_WEAK_DEF:
429 case DYN_DEF * 16 + DYN_WEAK_DEF:
430 case DYN_WEAK_DEF * 16 + DYN_WEAK_DEF:
431 // Ignore a weak dynamic definition if we already have a
435 case UNDEF * 16 + DYN_WEAK_DEF:
436 case WEAK_UNDEF * 16 + DYN_WEAK_DEF:
437 case DYN_UNDEF * 16 + DYN_WEAK_DEF:
438 case DYN_WEAK_UNDEF * 16 + DYN_WEAK_DEF:
439 // Use a weak dynamic definition if we have a reference.
442 case COMMON * 16 + DYN_WEAK_DEF:
443 case WEAK_COMMON * 16 + DYN_WEAK_DEF:
444 case DYN_COMMON * 16 + DYN_WEAK_DEF:
445 case DYN_WEAK_COMMON * 16 + DYN_WEAK_DEF:
446 // Ignore a weak dynamic definition if we already have a common
450 case DEF * 16 + UNDEF:
451 case WEAK_DEF * 16 + UNDEF:
452 case DYN_DEF * 16 + UNDEF:
453 case DYN_WEAK_DEF * 16 + UNDEF:
454 case UNDEF * 16 + UNDEF:
455 // A new undefined reference tells us nothing.
458 case WEAK_UNDEF * 16 + UNDEF:
459 case DYN_UNDEF * 16 + UNDEF:
460 case DYN_WEAK_UNDEF * 16 + UNDEF:
461 // A strong undef overrides a dynamic or weak undef.
464 case COMMON * 16 + UNDEF:
465 case WEAK_COMMON * 16 + UNDEF:
466 case DYN_COMMON * 16 + UNDEF:
467 case DYN_WEAK_COMMON * 16 + UNDEF:
468 // A new undefined reference tells us nothing.
471 case DEF * 16 + WEAK_UNDEF:
472 case WEAK_DEF * 16 + WEAK_UNDEF:
473 case DYN_DEF * 16 + WEAK_UNDEF:
474 case DYN_WEAK_DEF * 16 + WEAK_UNDEF:
475 case UNDEF * 16 + WEAK_UNDEF:
476 case WEAK_UNDEF * 16 + WEAK_UNDEF:
477 case DYN_UNDEF * 16 + WEAK_UNDEF:
478 case DYN_WEAK_UNDEF * 16 + WEAK_UNDEF:
479 case COMMON * 16 + WEAK_UNDEF:
480 case WEAK_COMMON * 16 + WEAK_UNDEF:
481 case DYN_COMMON * 16 + WEAK_UNDEF:
482 case DYN_WEAK_COMMON * 16 + WEAK_UNDEF:
483 // A new weak undefined reference tells us nothing.
486 case DEF * 16 + DYN_UNDEF:
487 case WEAK_DEF * 16 + DYN_UNDEF:
488 case DYN_DEF * 16 + DYN_UNDEF:
489 case DYN_WEAK_DEF * 16 + DYN_UNDEF:
490 case UNDEF * 16 + DYN_UNDEF:
491 case WEAK_UNDEF * 16 + DYN_UNDEF:
492 case DYN_UNDEF * 16 + DYN_UNDEF:
493 case DYN_WEAK_UNDEF * 16 + DYN_UNDEF:
494 case COMMON * 16 + DYN_UNDEF:
495 case WEAK_COMMON * 16 + DYN_UNDEF:
496 case DYN_COMMON * 16 + DYN_UNDEF:
497 case DYN_WEAK_COMMON * 16 + DYN_UNDEF:
498 // A new dynamic undefined reference tells us nothing.
501 case DEF * 16 + DYN_WEAK_UNDEF:
502 case WEAK_DEF * 16 + DYN_WEAK_UNDEF:
503 case DYN_DEF * 16 + DYN_WEAK_UNDEF:
504 case DYN_WEAK_DEF * 16 + DYN_WEAK_UNDEF:
505 case UNDEF * 16 + DYN_WEAK_UNDEF:
506 case WEAK_UNDEF * 16 + DYN_WEAK_UNDEF:
507 case DYN_UNDEF * 16 + DYN_WEAK_UNDEF:
508 case DYN_WEAK_UNDEF * 16 + DYN_WEAK_UNDEF:
509 case COMMON * 16 + DYN_WEAK_UNDEF:
510 case WEAK_COMMON * 16 + DYN_WEAK_UNDEF:
511 case DYN_COMMON * 16 + DYN_WEAK_UNDEF:
512 case DYN_WEAK_COMMON * 16 + DYN_WEAK_UNDEF:
513 // A new weak dynamic undefined reference tells us nothing.
516 case DEF * 16 + COMMON:
517 // A common symbol does not override a definition.
520 case WEAK_DEF * 16 + COMMON:
521 case DYN_DEF * 16 + COMMON:
522 case DYN_WEAK_DEF * 16 + COMMON:
523 // A common symbol does override a weak definition or a dynamic
527 case UNDEF * 16 + COMMON:
528 case WEAK_UNDEF * 16 + COMMON:
529 case DYN_UNDEF * 16 + COMMON:
530 case DYN_WEAK_UNDEF * 16 + COMMON:
531 // A common symbol is a definition for a reference.
534 case COMMON * 16 + COMMON:
535 // Set the size to the maximum.
536 *adjust_common_sizes = true;
539 case WEAK_COMMON * 16 + COMMON:
540 // I'm not sure just what a weak common symbol means, but
541 // presumably it can be overridden by a regular common symbol.
544 case DYN_COMMON * 16 + COMMON:
545 case DYN_WEAK_COMMON * 16 + COMMON:
546 // Use the real common symbol, but adjust the size if necessary.
547 *adjust_common_sizes = true;
550 case DEF * 16 + WEAK_COMMON:
551 case WEAK_DEF * 16 + WEAK_COMMON:
552 case DYN_DEF * 16 + WEAK_COMMON:
553 case DYN_WEAK_DEF * 16 + WEAK_COMMON:
554 // Whatever a weak common symbol is, it won't override a
558 case UNDEF * 16 + WEAK_COMMON:
559 case WEAK_UNDEF * 16 + WEAK_COMMON:
560 case DYN_UNDEF * 16 + WEAK_COMMON:
561 case DYN_WEAK_UNDEF * 16 + WEAK_COMMON:
562 // A weak common symbol is better than an undefined symbol.
565 case COMMON * 16 + WEAK_COMMON:
566 case WEAK_COMMON * 16 + WEAK_COMMON:
567 case DYN_COMMON * 16 + WEAK_COMMON:
568 case DYN_WEAK_COMMON * 16 + WEAK_COMMON:
569 // Ignore a weak common symbol in the presence of a real common
573 case DEF * 16 + DYN_COMMON:
574 case WEAK_DEF * 16 + DYN_COMMON:
575 case DYN_DEF * 16 + DYN_COMMON:
576 case DYN_WEAK_DEF * 16 + DYN_COMMON:
577 // Ignore a dynamic common symbol in the presence of a
581 case UNDEF * 16 + DYN_COMMON:
582 case WEAK_UNDEF * 16 + DYN_COMMON:
583 case DYN_UNDEF * 16 + DYN_COMMON:
584 case DYN_WEAK_UNDEF * 16 + DYN_COMMON:
585 // A dynamic common symbol is a definition of sorts.
588 case COMMON * 16 + DYN_COMMON:
589 case WEAK_COMMON * 16 + DYN_COMMON:
590 case DYN_COMMON * 16 + DYN_COMMON:
591 case DYN_WEAK_COMMON * 16 + DYN_COMMON:
592 // Set the size to the maximum.
593 *adjust_common_sizes = true;
596 case DEF * 16 + DYN_WEAK_COMMON:
597 case WEAK_DEF * 16 + DYN_WEAK_COMMON:
598 case DYN_DEF * 16 + DYN_WEAK_COMMON:
599 case DYN_WEAK_DEF * 16 + DYN_WEAK_COMMON:
600 // A common symbol is ignored in the face of a definition.
603 case UNDEF * 16 + DYN_WEAK_COMMON:
604 case WEAK_UNDEF * 16 + DYN_WEAK_COMMON:
605 case DYN_UNDEF * 16 + DYN_WEAK_COMMON:
606 case DYN_WEAK_UNDEF * 16 + DYN_WEAK_COMMON:
607 // I guess a weak common symbol is better than a definition.
610 case COMMON * 16 + DYN_WEAK_COMMON:
611 case WEAK_COMMON * 16 + DYN_WEAK_COMMON:
612 case DYN_COMMON * 16 + DYN_WEAK_COMMON:
613 case DYN_WEAK_COMMON * 16 + DYN_WEAK_COMMON:
614 // Set the size to the maximum.
615 *adjust_common_sizes = true;
623 // A special case of should_override which is only called for a strong
624 // defined symbol from a regular object file. This is used when
625 // defining special symbols.
628 Symbol_table::should_override_with_special(const Symbol* to)
630 bool adjust_common_sizes;
631 unsigned int frombits = global_flag | regular_flag | def_flag;
632 bool ret = Symbol_table::should_override(to, frombits, NULL,
633 &adjust_common_sizes);
634 gold_assert(!adjust_common_sizes);
638 // Override symbol base with a special symbol.
641 Symbol::override_base_with_special(const Symbol* from)
643 gold_assert(this->name_ == from->name_ || this->has_alias());
645 this->source_ = from->source_;
646 switch (from->source_)
649 this->u_.from_object = from->u_.from_object;
652 this->u_.in_output_data = from->u_.in_output_data;
654 case IN_OUTPUT_SEGMENT:
655 this->u_.in_output_segment = from->u_.in_output_segment;
664 if (from->version_ != NULL && this->version_ != from->version_)
666 gold_assert(this->version_ == NULL);
667 this->version_ = from->version_;
670 this->type_ = from->type_;
671 this->binding_ = from->binding_;
672 this->visibility_ = from->visibility_;
673 this->nonvis_ = from->nonvis_;
675 // Special symbols are always considered to be regular symbols.
676 this->in_reg_ = true;
678 if (from->needs_dynsym_entry_)
679 this->needs_dynsym_entry_ = true;
680 if (from->needs_dynsym_value_)
681 this->needs_dynsym_value_ = true;
683 // We shouldn't see these flags. If we do, we need to handle them
685 gold_assert(!from->is_target_special_ || this->is_target_special_);
686 gold_assert(!from->is_forwarder_);
687 gold_assert(!from->has_got_offset_);
688 gold_assert(!from->has_plt_offset_);
689 gold_assert(!from->has_warning_);
690 gold_assert(!from->is_copied_from_dynobj_);
691 gold_assert(!from->is_forced_local_);
694 // Override a symbol with a special symbol.
698 Sized_symbol<size>::override_with_special(const Sized_symbol<size>* from)
700 this->override_base_with_special(from);
701 this->value_ = from->value_;
702 this->symsize_ = from->symsize_;
705 // Override TOSYM with the special symbol FROMSYM. This handles all
710 Symbol_table::override_with_special(Sized_symbol<size>* tosym,
711 const Sized_symbol<size>* fromsym)
713 tosym->override_with_special(fromsym);
714 if (tosym->has_alias())
716 Symbol* sym = this->weak_aliases_[tosym];
717 gold_assert(sym != NULL);
718 Sized_symbol<size>* ssym;
719 ssym = this->get_sized_symbol SELECT_SIZE_NAME(size) (sym
723 ssym->override_with_special(fromsym);
724 sym = this->weak_aliases_[ssym];
725 gold_assert(sym != NULL);
726 ssym = this->get_sized_symbol SELECT_SIZE_NAME(size) (
727 sym SELECT_SIZE(size));
729 while (ssym != tosym);
731 if (tosym->binding() == elfcpp::STB_LOCAL)
732 this->force_local(tosym);
735 // Instantiate the templates we need. We could use the configure
736 // script to restrict this to only the ones needed for implemented
739 #ifdef HAVE_TARGET_32_LITTLE
742 Symbol_table::resolve<32, false>(
743 Sized_symbol<32>* to,
744 const elfcpp::Sym<32, false>& sym,
745 const elfcpp::Sym<32, false>& orig_sym,
747 const char* version);
750 #ifdef HAVE_TARGET_32_BIG
753 Symbol_table::resolve<32, true>(
754 Sized_symbol<32>* to,
755 const elfcpp::Sym<32, true>& sym,
756 const elfcpp::Sym<32, true>& orig_sym,
758 const char* version);
761 #ifdef HAVE_TARGET_64_LITTLE
764 Symbol_table::resolve<64, false>(
765 Sized_symbol<64>* to,
766 const elfcpp::Sym<64, false>& sym,
767 const elfcpp::Sym<64, false>& orig_sym,
769 const char* version);
772 #ifdef HAVE_TARGET_64_BIG
775 Symbol_table::resolve<64, true>(
776 Sized_symbol<64>* to,
777 const elfcpp::Sym<64, true>& sym,
778 const elfcpp::Sym<64, true>& orig_sym,
780 const char* version);
783 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
786 Symbol_table::override_with_special<32>(Sized_symbol<32>*,
787 const Sized_symbol<32>*);
790 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
793 Symbol_table::override_with_special<64>(Sized_symbol<64>*,
794 const Sized_symbol<64>*);
797 } // End namespace gold.