]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blame - gold/symtab.cc
* dwarf2.h (DW_AT_GNU_macros): New.
[thirdparty/binutils-gdb.git] / gold / symtab.cc
CommitLineData
14bfc3f5
ILT
1// symtab.cc -- the gold symbol table
2
0f3b89d8 3// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
6cb15b7f
ILT
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
14bfc3f5
ILT
23#include "gold.h"
24
04bf7072 25#include <cstring>
14bfc3f5 26#include <stdint.h>
04bf7072 27#include <algorithm>
70e654ba 28#include <set>
14bfc3f5
ILT
29#include <string>
30#include <utility>
a2b1aa12 31#include "demangle.h"
14bfc3f5 32
6d03d481 33#include "gc.h"
14bfc3f5 34#include "object.h"
70e654ba 35#include "dwarf_reader.h"
dbe717ef 36#include "dynobj.h"
75f65a3e 37#include "output.h"
61ba1cf9 38#include "target.h"
645f8123 39#include "workqueue.h"
14bfc3f5 40#include "symtab.h"
88a4108b 41#include "script.h"
89fc3421 42#include "plugin.h"
cdc29364 43#include "incremental.h"
14bfc3f5
ILT
44
45namespace gold
46{
47
48// Class Symbol.
49
ead1e424
ILT
50// Initialize fields in Symbol. This initializes everything except u_
51// and source_.
14bfc3f5 52
14bfc3f5 53void
2ea97941
ILT
54Symbol::init_fields(const char* name, const char* version,
55 elfcpp::STT type, elfcpp::STB binding,
56 elfcpp::STV visibility, unsigned char nonvis)
14bfc3f5 57{
2ea97941
ILT
58 this->name_ = name;
59 this->version_ = version;
c06b7b0b
ILT
60 this->symtab_index_ = 0;
61 this->dynsym_index_ = 0;
0a65a3a7 62 this->got_offsets_.init();
880cd20d 63 this->plt_offset_ = -1U;
2ea97941
ILT
64 this->type_ = type;
65 this->binding_ = binding;
66 this->visibility_ = visibility;
67 this->nonvis_ = nonvis;
1564db8d
ILT
68 this->is_def_ = false;
69 this->is_forwarder_ = false;
aeddab66 70 this->has_alias_ = false;
c06b7b0b 71 this->needs_dynsym_entry_ = false;
008db82e 72 this->in_reg_ = false;
ead1e424 73 this->in_dyn_ = false;
f6ce93d6 74 this->has_warning_ = false;
46fe1623 75 this->is_copied_from_dynobj_ = false;
55a93433 76 this->is_forced_local_ = false;
d491d34e 77 this->is_ordinary_shndx_ = false;
89fc3421 78 this->in_real_elf_ = false;
880cd20d 79 this->is_defined_in_discarded_section_ = false;
ce279a62
CC
80 this->undef_binding_set_ = false;
81 this->undef_binding_weak_ = false;
5146f448 82 this->is_predefined_ = false;
ead1e424
ILT
83}
84
a2b1aa12
ILT
85// Return the demangled version of the symbol's name, but only
86// if the --demangle flag was set.
87
88static std::string
2ea97941 89demangle(const char* name)
a2b1aa12 90{
086a1841 91 if (!parameters->options().do_demangle())
2ea97941 92 return name;
ff541f30 93
a2b1aa12
ILT
94 // cplus_demangle allocates memory for the result it returns,
95 // and returns NULL if the name is already demangled.
2ea97941 96 char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS);
a2b1aa12 97 if (demangled_name == NULL)
2ea97941 98 return name;
a2b1aa12
ILT
99
100 std::string retval(demangled_name);
101 free(demangled_name);
102 return retval;
103}
104
105std::string
106Symbol::demangled_name() const
107{
ff541f30 108 return demangle(this->name());
a2b1aa12
ILT
109}
110
ead1e424
ILT
111// Initialize the fields in the base class Symbol for SYM in OBJECT.
112
113template<int size, bool big_endian>
114void
2ea97941 115Symbol::init_base_object(const char* name, const char* version, Object* object,
f3e9c5c5
ILT
116 const elfcpp::Sym<size, big_endian>& sym,
117 unsigned int st_shndx, bool is_ordinary)
ead1e424 118{
2ea97941 119 this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(),
ead1e424 120 sym.get_st_visibility(), sym.get_st_nonvis());
2ea97941 121 this->u_.from_object.object = object;
d491d34e
ILT
122 this->u_.from_object.shndx = st_shndx;
123 this->is_ordinary_shndx_ = is_ordinary;
ead1e424 124 this->source_ = FROM_OBJECT;
2ea97941
ILT
125 this->in_reg_ = !object->is_dynamic();
126 this->in_dyn_ = object->is_dynamic();
127 this->in_real_elf_ = object->pluginobj() == NULL;
14bfc3f5
ILT
128}
129
ead1e424
ILT
130// Initialize the fields in the base class Symbol for a symbol defined
131// in an Output_data.
132
133void
2ea97941
ILT
134Symbol::init_base_output_data(const char* name, const char* version,
135 Output_data* od, elfcpp::STT type,
136 elfcpp::STB binding, elfcpp::STV visibility,
5146f448
CC
137 unsigned char nonvis, bool offset_is_from_end,
138 bool is_predefined)
ead1e424 139{
2ea97941 140 this->init_fields(name, version, type, binding, visibility, nonvis);
ead1e424 141 this->u_.in_output_data.output_data = od;
2ea97941 142 this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
ead1e424 143 this->source_ = IN_OUTPUT_DATA;
008db82e 144 this->in_reg_ = true;
89fc3421 145 this->in_real_elf_ = true;
5146f448 146 this->is_predefined_ = is_predefined;
ead1e424
ILT
147}
148
149// Initialize the fields in the base class Symbol for a symbol defined
150// in an Output_segment.
151
152void
2ea97941
ILT
153Symbol::init_base_output_segment(const char* name, const char* version,
154 Output_segment* os, elfcpp::STT type,
155 elfcpp::STB binding, elfcpp::STV visibility,
156 unsigned char nonvis,
5146f448
CC
157 Segment_offset_base offset_base,
158 bool is_predefined)
ead1e424 159{
2ea97941 160 this->init_fields(name, version, type, binding, visibility, nonvis);
ead1e424 161 this->u_.in_output_segment.output_segment = os;
2ea97941 162 this->u_.in_output_segment.offset_base = offset_base;
ead1e424 163 this->source_ = IN_OUTPUT_SEGMENT;
008db82e 164 this->in_reg_ = true;
89fc3421 165 this->in_real_elf_ = true;
5146f448 166 this->is_predefined_ = is_predefined;
ead1e424
ILT
167}
168
169// Initialize the fields in the base class Symbol for a symbol defined
170// as a constant.
171
172void
2ea97941
ILT
173Symbol::init_base_constant(const char* name, const char* version,
174 elfcpp::STT type, elfcpp::STB binding,
5146f448
CC
175 elfcpp::STV visibility, unsigned char nonvis,
176 bool is_predefined)
f3e9c5c5 177{
2ea97941 178 this->init_fields(name, version, type, binding, visibility, nonvis);
f3e9c5c5
ILT
179 this->source_ = IS_CONSTANT;
180 this->in_reg_ = true;
89fc3421 181 this->in_real_elf_ = true;
5146f448 182 this->is_predefined_ = is_predefined;
f3e9c5c5
ILT
183}
184
185// Initialize the fields in the base class Symbol for an undefined
186// symbol.
187
188void
2ea97941
ILT
189Symbol::init_base_undefined(const char* name, const char* version,
190 elfcpp::STT type, elfcpp::STB binding,
191 elfcpp::STV visibility, unsigned char nonvis)
ead1e424 192{
2ea97941 193 this->init_fields(name, version, type, binding, visibility, nonvis);
d7ab2a47 194 this->dynsym_index_ = -1U;
f3e9c5c5 195 this->source_ = IS_UNDEFINED;
008db82e 196 this->in_reg_ = true;
89fc3421 197 this->in_real_elf_ = true;
ead1e424
ILT
198}
199
c7912668
ILT
200// Allocate a common symbol in the base.
201
202void
203Symbol::allocate_base_common(Output_data* od)
204{
205 gold_assert(this->is_common());
206 this->source_ = IN_OUTPUT_DATA;
207 this->u_.in_output_data.output_data = od;
208 this->u_.in_output_data.offset_is_from_end = false;
209}
210
ead1e424 211// Initialize the fields in Sized_symbol for SYM in OBJECT.
14bfc3f5
ILT
212
213template<int size>
214template<bool big_endian>
215void
2ea97941
ILT
216Sized_symbol<size>::init_object(const char* name, const char* version,
217 Object* object,
f3e9c5c5
ILT
218 const elfcpp::Sym<size, big_endian>& sym,
219 unsigned int st_shndx, bool is_ordinary)
14bfc3f5 220{
2ea97941 221 this->init_base_object(name, version, object, sym, st_shndx, is_ordinary);
14bfc3f5 222 this->value_ = sym.get_st_value();
ead1e424
ILT
223 this->symsize_ = sym.get_st_size();
224}
225
226// Initialize the fields in Sized_symbol for a symbol defined in an
227// Output_data.
228
229template<int size>
230void
2ea97941
ILT
231Sized_symbol<size>::init_output_data(const char* name, const char* version,
232 Output_data* od, Value_type value,
233 Size_type symsize, elfcpp::STT type,
234 elfcpp::STB binding,
235 elfcpp::STV visibility,
236 unsigned char nonvis,
5146f448
CC
237 bool offset_is_from_end,
238 bool is_predefined)
ead1e424 239{
2ea97941 240 this->init_base_output_data(name, version, od, type, binding, visibility,
5146f448 241 nonvis, offset_is_from_end, is_predefined);
2ea97941
ILT
242 this->value_ = value;
243 this->symsize_ = symsize;
ead1e424
ILT
244}
245
246// Initialize the fields in Sized_symbol for a symbol defined in an
247// Output_segment.
248
249template<int size>
250void
2ea97941
ILT
251Sized_symbol<size>::init_output_segment(const char* name, const char* version,
252 Output_segment* os, Value_type value,
253 Size_type symsize, elfcpp::STT type,
254 elfcpp::STB binding,
255 elfcpp::STV visibility,
256 unsigned char nonvis,
5146f448
CC
257 Segment_offset_base offset_base,
258 bool is_predefined)
ead1e424 259{
2ea97941 260 this->init_base_output_segment(name, version, os, type, binding, visibility,
5146f448 261 nonvis, offset_base, is_predefined);
2ea97941
ILT
262 this->value_ = value;
263 this->symsize_ = symsize;
ead1e424
ILT
264}
265
266// Initialize the fields in Sized_symbol for a symbol defined as a
267// constant.
268
269template<int size>
270void
2ea97941
ILT
271Sized_symbol<size>::init_constant(const char* name, const char* version,
272 Value_type value, Size_type symsize,
273 elfcpp::STT type, elfcpp::STB binding,
5146f448
CC
274 elfcpp::STV visibility, unsigned char nonvis,
275 bool is_predefined)
ead1e424 276{
5146f448
CC
277 this->init_base_constant(name, version, type, binding, visibility, nonvis,
278 is_predefined);
2ea97941
ILT
279 this->value_ = value;
280 this->symsize_ = symsize;
14bfc3f5
ILT
281}
282
f3e9c5c5
ILT
283// Initialize the fields in Sized_symbol for an undefined symbol.
284
285template<int size>
286void
2ea97941
ILT
287Sized_symbol<size>::init_undefined(const char* name, const char* version,
288 elfcpp::STT type, elfcpp::STB binding,
289 elfcpp::STV visibility, unsigned char nonvis)
f3e9c5c5 290{
2ea97941 291 this->init_base_undefined(name, version, type, binding, visibility, nonvis);
f3e9c5c5
ILT
292 this->value_ = 0;
293 this->symsize_ = 0;
294}
295
6d1c4efb
ILT
296// Return an allocated string holding the symbol's name as
297// name@version. This is used for relocatable links.
298
299std::string
300Symbol::versioned_name() const
301{
302 gold_assert(this->version_ != NULL);
303 std::string ret = this->name_;
304 ret.push_back('@');
305 if (this->is_def_)
306 ret.push_back('@');
307 ret += this->version_;
308 return ret;
309}
310
8a5e3e08
ILT
311// Return true if SHNDX represents a common symbol.
312
313bool
2ea97941 314Symbol::is_common_shndx(unsigned int shndx)
8a5e3e08 315{
2ea97941
ILT
316 return (shndx == elfcpp::SHN_COMMON
317 || shndx == parameters->target().small_common_shndx()
318 || shndx == parameters->target().large_common_shndx());
8a5e3e08
ILT
319}
320
c7912668
ILT
321// Allocate a common symbol.
322
323template<int size>
324void
2ea97941 325Sized_symbol<size>::allocate_common(Output_data* od, Value_type value)
c7912668
ILT
326{
327 this->allocate_base_common(od);
2ea97941 328 this->value_ = value;
c7912668
ILT
329}
330
c82fbeee
CS
331// The ""'s around str ensure str is a string literal, so sizeof works.
332#define strprefix(var, str) (strncmp(var, str, sizeof("" str "") - 1) == 0)
333
436ca963
ILT
334// Return true if this symbol should be added to the dynamic symbol
335// table.
336
337inline bool
ce97fa81 338Symbol::should_add_dynsym_entry(Symbol_table* symtab) const
436ca963 339{
badc8139
RÁE
340 // If the symbol is only present on plugin files, the plugin decided we
341 // don't need it.
342 if (!this->in_real_elf())
343 return false;
344
436ca963
ILT
345 // If the symbol is used by a dynamic relocation, we need to add it.
346 if (this->needs_dynsym_entry())
347 return true;
348
6d03d481
ST
349 // If this symbol's section is not added, the symbol need not be added.
350 // The section may have been GCed. Note that export_dynamic is being
351 // overridden here. This should not be done for shared objects.
352 if (parameters->options().gc_sections()
353 && !parameters->options().shared()
354 && this->source() == Symbol::FROM_OBJECT
355 && !this->object()->is_dynamic())
356 {
357 Relobj* relobj = static_cast<Relobj*>(this->object());
358 bool is_ordinary;
2ea97941
ILT
359 unsigned int shndx = this->shndx(&is_ordinary);
360 if (is_ordinary && shndx != elfcpp::SHN_UNDEF
ce97fa81
ST
361 && !relobj->is_section_included(shndx)
362 && !symtab->is_section_folded(relobj, shndx))
6d03d481
ST
363 return false;
364 }
365
55a93433
ILT
366 // If the symbol was forced local in a version script, do not add it.
367 if (this->is_forced_local())
368 return false;
369
c82fbeee
CS
370 // If the symbol was forced dynamic in a --dynamic-list file, add it.
371 if (parameters->options().in_dynamic_list(this->name()))
372 return true;
373
374 // If dynamic-list-data was specified, add any STT_OBJECT.
375 if (parameters->options().dynamic_list_data()
376 && !this->is_from_dynobj()
377 && this->type() == elfcpp::STT_OBJECT)
378 return true;
379
380 // If --dynamic-list-cpp-new was specified, add any new/delete symbol.
381 // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols.
382 if ((parameters->options().dynamic_list_cpp_new()
383 || parameters->options().dynamic_list_cpp_typeinfo())
384 && !this->is_from_dynobj())
385 {
386 // TODO(csilvers): We could probably figure out if we're an operator
387 // new/delete or typeinfo without the need to demangle.
2ea97941
ILT
388 char* demangled_name = cplus_demangle(this->name(),
389 DMGL_ANSI | DMGL_PARAMS);
390 if (demangled_name == NULL)
c82fbeee
CS
391 {
392 // Not a C++ symbol, so it can't satisfy these flags
393 }
394 else if (parameters->options().dynamic_list_cpp_new()
2ea97941
ILT
395 && (strprefix(demangled_name, "operator new")
396 || strprefix(demangled_name, "operator delete")))
c82fbeee 397 {
2ea97941 398 free(demangled_name);
c82fbeee
CS
399 return true;
400 }
401 else if (parameters->options().dynamic_list_cpp_typeinfo()
2ea97941
ILT
402 && (strprefix(demangled_name, "typeinfo name for")
403 || strprefix(demangled_name, "typeinfo for")))
c82fbeee 404 {
2ea97941 405 free(demangled_name);
c82fbeee
CS
406 return true;
407 }
408 else
2ea97941 409 free(demangled_name);
c82fbeee
CS
410 }
411
436ca963
ILT
412 // If exporting all symbols or building a shared library,
413 // and the symbol is defined in a regular object and is
414 // externally visible, we need to add it.
8851ecca 415 if ((parameters->options().export_dynamic() || parameters->options().shared())
436ca963 416 && !this->is_from_dynobj()
f3ae1b28 417 && !this->is_undefined()
436ca963
ILT
418 && this->is_externally_visible())
419 return true;
420
421 return false;
422}
423
b3b74ddc
ILT
424// Return true if the final value of this symbol is known at link
425// time.
426
427bool
428Symbol::final_value_is_known() const
429{
430 // If we are not generating an executable, then no final values are
431 // known, since they will change at runtime.
374ad285
ILT
432 if (parameters->options().output_is_position_independent()
433 || parameters->options().relocatable())
b3b74ddc
ILT
434 return false;
435
f3e9c5c5
ILT
436 // If the symbol is not from an object file, and is not undefined,
437 // then it is defined, and known.
b3b74ddc 438 if (this->source_ != FROM_OBJECT)
f3e9c5c5
ILT
439 {
440 if (this->source_ != IS_UNDEFINED)
441 return true;
442 }
443 else
444 {
445 // If the symbol is from a dynamic object, then the final value
446 // is not known.
447 if (this->object()->is_dynamic())
448 return false;
b3b74ddc 449
f3e9c5c5
ILT
450 // If the symbol is not undefined (it is defined or common),
451 // then the final value is known.
452 if (!this->is_undefined())
453 return true;
454 }
b3b74ddc
ILT
455
456 // If the symbol is undefined, then whether the final value is known
457 // depends on whether we are doing a static link. If we are doing a
458 // dynamic link, then the final value could be filled in at runtime.
459 // This could reasonably be the case for a weak undefined symbol.
460 return parameters->doing_static_link();
461}
462
77e65537 463// Return the output section where this symbol is defined.
a445fddf 464
77e65537
ILT
465Output_section*
466Symbol::output_section() const
a445fddf
ILT
467{
468 switch (this->source_)
469 {
470 case FROM_OBJECT:
77e65537 471 {
2ea97941
ILT
472 unsigned int shndx = this->u_.from_object.shndx;
473 if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_)
77e65537
ILT
474 {
475 gold_assert(!this->u_.from_object.object->is_dynamic());
89fc3421 476 gold_assert(this->u_.from_object.object->pluginobj() == NULL);
77e65537 477 Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object);
2ea97941 478 return relobj->output_section(shndx);
77e65537
ILT
479 }
480 return NULL;
481 }
482
a445fddf 483 case IN_OUTPUT_DATA:
77e65537
ILT
484 return this->u_.in_output_data.output_data->output_section();
485
a445fddf 486 case IN_OUTPUT_SEGMENT:
f3e9c5c5
ILT
487 case IS_CONSTANT:
488 case IS_UNDEFINED:
77e65537
ILT
489 return NULL;
490
491 default:
492 gold_unreachable();
493 }
494}
495
496// Set the symbol's output section. This is used for symbols defined
497// in scripts. This should only be called after the symbol table has
498// been finalized.
499
500void
501Symbol::set_output_section(Output_section* os)
502{
503 switch (this->source_)
504 {
505 case FROM_OBJECT:
506 case IN_OUTPUT_DATA:
507 gold_assert(this->output_section() == os);
508 break;
f3e9c5c5 509 case IS_CONSTANT:
77e65537
ILT
510 this->source_ = IN_OUTPUT_DATA;
511 this->u_.in_output_data.output_data = os;
512 this->u_.in_output_data.offset_is_from_end = false;
513 break;
514 case IN_OUTPUT_SEGMENT:
f3e9c5c5 515 case IS_UNDEFINED:
a445fddf
ILT
516 default:
517 gold_unreachable();
518 }
519}
520
14bfc3f5
ILT
521// Class Symbol_table.
522
09124467 523Symbol_table::Symbol_table(unsigned int count,
2ea97941 524 const Version_script_info& version_script)
6d013333 525 : saw_undefined_(0), offset_(0), table_(count), namepool_(),
8a5e3e08
ILT
526 forwarders_(), commons_(), tls_commons_(), small_commons_(),
527 large_commons_(), forced_locals_(), warnings_(),
2ea97941 528 version_script_(version_script), gc_(NULL), icf_(NULL)
14bfc3f5 529{
6d013333 530 namepool_.reserve(count);
14bfc3f5
ILT
531}
532
533Symbol_table::~Symbol_table()
534{
535}
536
ad8f37d1
ILT
537// The symbol table key equality function. This is called with
538// Stringpool keys.
14bfc3f5 539
ad8f37d1 540inline bool
14bfc3f5
ILT
541Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1,
542 const Symbol_table_key& k2) const
543{
544 return k1.first == k2.first && k1.second == k2.second;
545}
546
ef15dade 547bool
2ea97941 548Symbol_table::is_section_folded(Object* obj, unsigned int shndx) const
ef15dade 549{
032ce4e9 550 return (parameters->options().icf_enabled()
2ea97941 551 && this->icf_->is_section_folded(obj, shndx));
ef15dade
ST
552}
553
6d03d481
ST
554// For symbols that have been listed with -u option, add them to the
555// work list to avoid gc'ing them.
556
557void
88a4108b 558Symbol_table::gc_mark_undef_symbols(Layout* layout)
6d03d481
ST
559{
560 for (options::String_set::const_iterator p =
561 parameters->options().undefined_begin();
562 p != parameters->options().undefined_end();
563 ++p)
564 {
2ea97941
ILT
565 const char* name = p->c_str();
566 Symbol* sym = this->lookup(name);
ca09d69a 567 gold_assert(sym != NULL);
6d03d481
ST
568 if (sym->source() == Symbol::FROM_OBJECT
569 && !sym->object()->is_dynamic())
570 {
571 Relobj* obj = static_cast<Relobj*>(sym->object());
572 bool is_ordinary;
2ea97941 573 unsigned int shndx = sym->shndx(&is_ordinary);
6d03d481
ST
574 if (is_ordinary)
575 {
576 gold_assert(this->gc_ != NULL);
2ea97941 577 this->gc_->worklist().push(Section_id(obj, shndx));
6d03d481
ST
578 }
579 }
580 }
88a4108b
ILT
581
582 for (Script_options::referenced_const_iterator p =
583 layout->script_options()->referenced_begin();
584 p != layout->script_options()->referenced_end();
585 ++p)
586 {
587 Symbol* sym = this->lookup(p->c_str());
588 gold_assert(sym != NULL);
589 if (sym->source() == Symbol::FROM_OBJECT
590 && !sym->object()->is_dynamic())
591 {
592 Relobj* obj = static_cast<Relobj*>(sym->object());
593 bool is_ordinary;
594 unsigned int shndx = sym->shndx(&is_ordinary);
595 if (is_ordinary)
596 {
597 gold_assert(this->gc_ != NULL);
598 this->gc_->worklist().push(Section_id(obj, shndx));
599 }
600 }
601 }
6d03d481
ST
602}
603
604void
605Symbol_table::gc_mark_symbol_for_shlib(Symbol* sym)
606{
607 if (!sym->is_from_dynobj()
608 && sym->is_externally_visible())
609 {
610 //Add the object and section to the work list.
611 Relobj* obj = static_cast<Relobj*>(sym->object());
612 bool is_ordinary;
2ea97941
ILT
613 unsigned int shndx = sym->shndx(&is_ordinary);
614 if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
6d03d481
ST
615 {
616 gold_assert(this->gc_!= NULL);
2ea97941 617 this->gc_->worklist().push(Section_id(obj, shndx));
6d03d481
ST
618 }
619 }
620}
621
622// When doing garbage collection, keep symbols that have been seen in
623// dynamic objects.
624inline void
625Symbol_table::gc_mark_dyn_syms(Symbol* sym)
626{
627 if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT
628 && !sym->object()->is_dynamic())
629 {
ca09d69a 630 Relobj* obj = static_cast<Relobj*>(sym->object());
6d03d481 631 bool is_ordinary;
2ea97941
ILT
632 unsigned int shndx = sym->shndx(&is_ordinary);
633 if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
6d03d481
ST
634 {
635 gold_assert(this->gc_ != NULL);
2ea97941 636 this->gc_->worklist().push(Section_id(obj, shndx));
6d03d481
ST
637 }
638 }
639}
640
dd8670e5 641// Make TO a symbol which forwards to FROM.
14bfc3f5
ILT
642
643void
644Symbol_table::make_forwarder(Symbol* from, Symbol* to)
645{
a3ad94ed
ILT
646 gold_assert(from != to);
647 gold_assert(!from->is_forwarder() && !to->is_forwarder());
14bfc3f5
ILT
648 this->forwarders_[from] = to;
649 from->set_forwarder();
650}
651
61ba1cf9
ILT
652// Resolve the forwards from FROM, returning the real symbol.
653
14bfc3f5 654Symbol*
c06b7b0b 655Symbol_table::resolve_forwards(const Symbol* from) const
14bfc3f5 656{
a3ad94ed 657 gold_assert(from->is_forwarder());
c06b7b0b 658 Unordered_map<const Symbol*, Symbol*>::const_iterator p =
14bfc3f5 659 this->forwarders_.find(from);
a3ad94ed 660 gold_assert(p != this->forwarders_.end());
14bfc3f5
ILT
661 return p->second;
662}
663
61ba1cf9
ILT
664// Look up a symbol by name.
665
666Symbol*
2ea97941 667Symbol_table::lookup(const char* name, const char* version) const
61ba1cf9 668{
f0641a0b 669 Stringpool::Key name_key;
2ea97941
ILT
670 name = this->namepool_.find(name, &name_key);
671 if (name == NULL)
61ba1cf9 672 return NULL;
f0641a0b
ILT
673
674 Stringpool::Key version_key = 0;
2ea97941 675 if (version != NULL)
61ba1cf9 676 {
2ea97941
ILT
677 version = this->namepool_.find(version, &version_key);
678 if (version == NULL)
61ba1cf9
ILT
679 return NULL;
680 }
681
f0641a0b 682 Symbol_table_key key(name_key, version_key);
61ba1cf9
ILT
683 Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
684 if (p == this->table_.end())
685 return NULL;
686 return p->second;
687}
688
14bfc3f5
ILT
689// Resolve a Symbol with another Symbol. This is only used in the
690// unusual case where there are references to both an unversioned
691// symbol and a symbol with a version, and we then discover that that
1564db8d
ILT
692// version is the default version. Because this is unusual, we do
693// this the slow way, by converting back to an ELF symbol.
14bfc3f5 694
1564db8d 695template<int size, bool big_endian>
14bfc3f5 696void
95d14cd3 697Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from)
14bfc3f5 698{
1564db8d
ILT
699 unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
700 elfcpp::Sym_write<size, big_endian> esym(buf);
d491d34e 701 // We don't bother to set the st_name or the st_shndx field.
1564db8d
ILT
702 esym.put_st_value(from->value());
703 esym.put_st_size(from->symsize());
704 esym.put_st_info(from->binding(), from->type());
ead1e424 705 esym.put_st_other(from->visibility(), from->nonvis());
d491d34e 706 bool is_ordinary;
2ea97941
ILT
707 unsigned int shndx = from->shndx(&is_ordinary);
708 this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(),
95d14cd3 709 from->version());
1ebd95fd
ILT
710 if (from->in_reg())
711 to->set_in_reg();
712 if (from->in_dyn())
713 to->set_in_dyn();
6d03d481
ST
714 if (parameters->options().gc_sections())
715 this->gc_mark_dyn_syms(to);
14bfc3f5
ILT
716}
717
0602e05a
ILT
718// Record that a symbol is forced to be local by a version script or
719// by visibility.
55a93433
ILT
720
721void
722Symbol_table::force_local(Symbol* sym)
723{
724 if (!sym->is_defined() && !sym->is_common())
725 return;
726 if (sym->is_forced_local())
727 {
728 // We already got this one.
729 return;
730 }
731 sym->set_is_forced_local();
732 this->forced_locals_.push_back(sym);
733}
734
0864d551
ILT
735// Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
736// is only called for undefined symbols, when at least one --wrap
737// option was used.
738
739const char*
2ea97941 740Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key)
0864d551
ILT
741{
742 // For some targets, we need to ignore a specific character when
743 // wrapping, and add it back later.
744 char prefix = '\0';
2ea97941 745 if (name[0] == parameters->target().wrap_char())
0864d551 746 {
2ea97941
ILT
747 prefix = name[0];
748 ++name;
0864d551
ILT
749 }
750
2ea97941 751 if (parameters->options().is_wrap(name))
0864d551
ILT
752 {
753 // Turn NAME into __wrap_NAME.
754 std::string s;
755 if (prefix != '\0')
756 s += prefix;
757 s += "__wrap_";
2ea97941 758 s += name;
0864d551
ILT
759
760 // This will give us both the old and new name in NAMEPOOL_, but
761 // that is OK. Only the versions we need will wind up in the
762 // real string table in the output file.
763 return this->namepool_.add(s.c_str(), true, name_key);
764 }
765
766 const char* const real_prefix = "__real_";
767 const size_t real_prefix_length = strlen(real_prefix);
2ea97941
ILT
768 if (strncmp(name, real_prefix, real_prefix_length) == 0
769 && parameters->options().is_wrap(name + real_prefix_length))
0864d551
ILT
770 {
771 // Turn __real_NAME into NAME.
772 std::string s;
773 if (prefix != '\0')
774 s += prefix;
2ea97941 775 s += name + real_prefix_length;
0864d551
ILT
776 return this->namepool_.add(s.c_str(), true, name_key);
777 }
778
2ea97941 779 return name;
0864d551
ILT
780}
781
8c500701
ILT
782// This is called when we see a symbol NAME/VERSION, and the symbol
783// already exists in the symbol table, and VERSION is marked as being
784// the default version. SYM is the NAME/VERSION symbol we just added.
785// DEFAULT_IS_NEW is true if this is the first time we have seen the
786// symbol NAME/NULL. PDEF points to the entry for NAME/NULL.
787
788template<int size, bool big_endian>
789void
790Symbol_table::define_default_version(Sized_symbol<size>* sym,
791 bool default_is_new,
792 Symbol_table_type::iterator pdef)
793{
794 if (default_is_new)
795 {
796 // This is the first time we have seen NAME/NULL. Make
797 // NAME/NULL point to NAME/VERSION, and mark SYM as the default
798 // version.
799 pdef->second = sym;
800 sym->set_is_default();
801 }
802 else if (pdef->second == sym)
803 {
804 // NAME/NULL already points to NAME/VERSION. Don't mark the
805 // symbol as the default if it is not already the default.
806 }
807 else
808 {
809 // This is the unfortunate case where we already have entries
810 // for both NAME/VERSION and NAME/NULL. We now see a symbol
811 // NAME/VERSION where VERSION is the default version. We have
812 // already resolved this new symbol with the existing
813 // NAME/VERSION symbol.
814
815 // It's possible that NAME/NULL and NAME/VERSION are both
816 // defined in regular objects. This can only happen if one
817 // object file defines foo and another defines foo@@ver. This
818 // is somewhat obscure, but we call it a multiple definition
819 // error.
820
821 // It's possible that NAME/NULL actually has a version, in which
822 // case it won't be the same as VERSION. This happens with
823 // ver_test_7.so in the testsuite for the symbol t2_2. We see
824 // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We
825 // then see an unadorned t2_2 in an object file and give it
826 // version VER1 from the version script. This looks like a
827 // default definition for VER1, so it looks like we should merge
828 // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's
829 // not obvious that this is an error, either. So we just punt.
830
831 // If one of the symbols has non-default visibility, and the
832 // other is defined in a shared object, then they are different
833 // symbols.
834
835 // Otherwise, we just resolve the symbols as though they were
836 // the same.
837
838 if (pdef->second->version() != NULL)
839 gold_assert(pdef->second->version() != sym->version());
840 else if (sym->visibility() != elfcpp::STV_DEFAULT
841 && pdef->second->is_from_dynobj())
842 ;
843 else if (pdef->second->visibility() != elfcpp::STV_DEFAULT
844 && sym->is_from_dynobj())
845 ;
846 else
847 {
848 const Sized_symbol<size>* symdef;
849 symdef = this->get_sized_symbol<size>(pdef->second);
850 Symbol_table::resolve<size, big_endian>(sym, symdef);
851 this->make_forwarder(pdef->second, sym);
852 pdef->second = sym;
853 sym->set_is_default();
854 }
855 }
856}
857
14bfc3f5
ILT
858// Add one symbol from OBJECT to the symbol table. NAME is symbol
859// name and VERSION is the version; both are canonicalized. DEF is
d491d34e
ILT
860// whether this is the default version. ST_SHNDX is the symbol's
861// section index; IS_ORDINARY is whether this is a normal section
862// rather than a special code.
14bfc3f5 863
8781f709
ILT
864// If IS_DEFAULT_VERSION is true, then this is the definition of a
865// default version of a symbol. That means that any lookup of
866// NAME/NULL and any lookup of NAME/VERSION should always return the
867// same symbol. This is obvious for references, but in particular we
868// want to do this for definitions: overriding NAME/NULL should also
869// override NAME/VERSION. If we don't do that, it would be very hard
870// to override functions in a shared library which uses versioning.
14bfc3f5
ILT
871
872// We implement this by simply making both entries in the hash table
873// point to the same Symbol structure. That is easy enough if this is
874// the first time we see NAME/NULL or NAME/VERSION, but it is possible
875// that we have seen both already, in which case they will both have
876// independent entries in the symbol table. We can't simply change
877// the symbol table entry, because we have pointers to the entries
878// attached to the object files. So we mark the entry attached to the
879// object file as a forwarder, and record it in the forwarders_ map.
880// Note that entries in the hash table will never be marked as
881// forwarders.
70e654ba 882//
d491d34e
ILT
883// ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
884// ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
885// for a special section code. ST_SHNDX may be modified if the symbol
886// is defined in a section being discarded.
14bfc3f5
ILT
887
888template<int size, bool big_endian>
aeddab66 889Sized_symbol<size>*
2ea97941 890Symbol_table::add_from_object(Object* object,
ca09d69a 891 const char* name,
f0641a0b 892 Stringpool::Key name_key,
ca09d69a 893 const char* version,
f0641a0b 894 Stringpool::Key version_key,
8781f709 895 bool is_default_version,
70e654ba 896 const elfcpp::Sym<size, big_endian>& sym,
d491d34e
ILT
897 unsigned int st_shndx,
898 bool is_ordinary,
899 unsigned int orig_st_shndx)
14bfc3f5 900{
c5818ff1 901 // Print a message if this symbol is being traced.
2ea97941 902 if (parameters->options().is_trace_symbol(name))
c5818ff1 903 {
d491d34e 904 if (orig_st_shndx == elfcpp::SHN_UNDEF)
2ea97941 905 gold_info(_("%s: reference to %s"), object->name().c_str(), name);
c5818ff1 906 else
2ea97941 907 gold_info(_("%s: definition of %s"), object->name().c_str(), name);
c5818ff1
CC
908 }
909
0864d551
ILT
910 // For an undefined symbol, we may need to adjust the name using
911 // --wrap.
d491d34e 912 if (orig_st_shndx == elfcpp::SHN_UNDEF
c5818ff1 913 && parameters->options().any_wrap())
0864d551 914 {
2ea97941
ILT
915 const char* wrap_name = this->wrap_symbol(name, &name_key);
916 if (wrap_name != name)
0864d551
ILT
917 {
918 // If we see a reference to malloc with version GLIBC_2.0,
919 // and we turn it into a reference to __wrap_malloc, then we
920 // discard the version number. Otherwise the user would be
921 // required to specify the correct version for
922 // __wrap_malloc.
2ea97941 923 version = NULL;
0864d551 924 version_key = 0;
2ea97941 925 name = wrap_name;
0864d551
ILT
926 }
927 }
928
14bfc3f5
ILT
929 Symbol* const snull = NULL;
930 std::pair<typename Symbol_table_type::iterator, bool> ins =
f0641a0b
ILT
931 this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
932 snull));
14bfc3f5 933
8781f709 934 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
14bfc3f5 935 std::make_pair(this->table_.end(), false);
8781f709 936 if (is_default_version)
14bfc3f5 937 {
f0641a0b 938 const Stringpool::Key vnull_key = 0;
8781f709
ILT
939 insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key,
940 vnull_key),
941 snull));
14bfc3f5
ILT
942 }
943
944 // ins.first: an iterator, which is a pointer to a pair.
945 // ins.first->first: the key (a pair of name and version).
946 // ins.first->second: the value (Symbol*).
947 // ins.second: true if new entry was inserted, false if not.
948
1564db8d 949 Sized_symbol<size>* ret;
ead1e424
ILT
950 bool was_undefined;
951 bool was_common;
14bfc3f5
ILT
952 if (!ins.second)
953 {
954 // We already have an entry for NAME/VERSION.
7d1a9ebb 955 ret = this->get_sized_symbol<size>(ins.first->second);
a3ad94ed 956 gold_assert(ret != NULL);
ead1e424
ILT
957
958 was_undefined = ret->is_undefined();
959 was_common = ret->is_common();
960
2ea97941
ILT
961 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
962 version);
6d03d481
ST
963 if (parameters->options().gc_sections())
964 this->gc_mark_dyn_syms(ret);
14bfc3f5 965
8781f709
ILT
966 if (is_default_version)
967 this->define_default_version<size, big_endian>(ret, insdefault.second,
968 insdefault.first);
14bfc3f5
ILT
969 }
970 else
971 {
972 // This is the first time we have seen NAME/VERSION.
a3ad94ed 973 gold_assert(ins.first->second == NULL);
ead1e424 974
8781f709 975 if (is_default_version && !insdefault.second)
14bfc3f5 976 {
14b31740
ILT
977 // We already have an entry for NAME/NULL. If we override
978 // it, then change it to NAME/VERSION.
8781f709 979 ret = this->get_sized_symbol<size>(insdefault.first->second);
18e6b24e
ILT
980
981 was_undefined = ret->is_undefined();
982 was_common = ret->is_common();
983
2ea97941
ILT
984 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
985 version);
6d03d481
ST
986 if (parameters->options().gc_sections())
987 this->gc_mark_dyn_syms(ret);
14bfc3f5
ILT
988 ins.first->second = ret;
989 }
990 else
991 {
18e6b24e
ILT
992 was_undefined = false;
993 was_common = false;
994
f6ce93d6 995 Sized_target<size, big_endian>* target =
029ba973 996 parameters->sized_target<size, big_endian>();
1564db8d
ILT
997 if (!target->has_make_symbol())
998 ret = new Sized_symbol<size>();
999 else
14bfc3f5 1000 {
1564db8d
ILT
1001 ret = target->make_symbol();
1002 if (ret == NULL)
14bfc3f5
ILT
1003 {
1004 // This means that we don't want a symbol table
1005 // entry after all.
8781f709 1006 if (!is_default_version)
14bfc3f5
ILT
1007 this->table_.erase(ins.first);
1008 else
1009 {
8781f709
ILT
1010 this->table_.erase(insdefault.first);
1011 // Inserting INSDEFAULT invalidated INS.
f0641a0b
ILT
1012 this->table_.erase(std::make_pair(name_key,
1013 version_key));
14bfc3f5
ILT
1014 }
1015 return NULL;
1016 }
1017 }
14bfc3f5 1018
2ea97941 1019 ret->init_object(name, version, object, sym, st_shndx, is_ordinary);
1564db8d 1020
14bfc3f5 1021 ins.first->second = ret;
8781f709 1022 if (is_default_version)
14bfc3f5
ILT
1023 {
1024 // This is the first time we have seen NAME/NULL. Point
1025 // it at the new entry for NAME/VERSION.
8781f709
ILT
1026 gold_assert(insdefault.second);
1027 insdefault.first->second = ret;
14bfc3f5
ILT
1028 }
1029 }
8c500701 1030
8781f709 1031 if (is_default_version)
8c500701 1032 ret->set_is_default();
14bfc3f5
ILT
1033 }
1034
ead1e424
ILT
1035 // Record every time we see a new undefined symbol, to speed up
1036 // archive groups.
1037 if (!was_undefined && ret->is_undefined())
0f3b89d8
ILT
1038 {
1039 ++this->saw_undefined_;
1040 if (parameters->options().has_plugins())
1041 parameters->options().plugins()->new_undefined_symbol(ret);
1042 }
ead1e424
ILT
1043
1044 // Keep track of common symbols, to speed up common symbol
1045 // allocation.
1046 if (!was_common && ret->is_common())
155a0dd7 1047 {
8a5e3e08 1048 if (ret->type() == elfcpp::STT_TLS)
155a0dd7 1049 this->tls_commons_.push_back(ret);
8a5e3e08
ILT
1050 else if (!is_ordinary
1051 && st_shndx == parameters->target().small_common_shndx())
1052 this->small_commons_.push_back(ret);
1053 else if (!is_ordinary
1054 && st_shndx == parameters->target().large_common_shndx())
1055 this->large_commons_.push_back(ret);
1056 else
1057 this->commons_.push_back(ret);
155a0dd7 1058 }
ead1e424 1059
0602e05a
ILT
1060 // If we're not doing a relocatable link, then any symbol with
1061 // hidden or internal visibility is local.
1062 if ((ret->visibility() == elfcpp::STV_HIDDEN
1063 || ret->visibility() == elfcpp::STV_INTERNAL)
1064 && (ret->binding() == elfcpp::STB_GLOBAL
adcf2816 1065 || ret->binding() == elfcpp::STB_GNU_UNIQUE
0602e05a
ILT
1066 || ret->binding() == elfcpp::STB_WEAK)
1067 && !parameters->options().relocatable())
1068 this->force_local(ret);
1069
14bfc3f5
ILT
1070 return ret;
1071}
1072
f6ce93d6 1073// Add all the symbols in a relocatable object to the hash table.
14bfc3f5
ILT
1074
1075template<int size, bool big_endian>
1076void
dbe717ef 1077Symbol_table::add_from_relobj(
6fa2a40b 1078 Sized_relobj_file<size, big_endian>* relobj,
f6ce93d6 1079 const unsigned char* syms,
14bfc3f5 1080 size_t count,
d491d34e 1081 size_t symndx_offset,
14bfc3f5
ILT
1082 const char* sym_names,
1083 size_t sym_name_size,
6fa2a40b 1084 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
ca09d69a 1085 size_t* defined)
14bfc3f5 1086{
92de84a6
ILT
1087 *defined = 0;
1088
8851ecca 1089 gold_assert(size == parameters->target().get_size());
14bfc3f5 1090
a783673b
ILT
1091 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1092
88dd47ac
ILT
1093 const bool just_symbols = relobj->just_symbols();
1094
f6ce93d6 1095 const unsigned char* p = syms;
a783673b 1096 for (size_t i = 0; i < count; ++i, p += sym_size)
14bfc3f5 1097 {
92de84a6
ILT
1098 (*sympointers)[i] = NULL;
1099
14bfc3f5
ILT
1100 elfcpp::Sym<size, big_endian> sym(p);
1101
d491d34e 1102 unsigned int st_name = sym.get_st_name();
14bfc3f5
ILT
1103 if (st_name >= sym_name_size)
1104 {
75f2446e
ILT
1105 relobj->error(_("bad global symbol name offset %u at %zu"),
1106 st_name, i);
1107 continue;
14bfc3f5
ILT
1108 }
1109
2ea97941 1110 const char* name = sym_names + st_name;
dbe717ef 1111
d491d34e
ILT
1112 bool is_ordinary;
1113 unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset,
1114 sym.get_st_shndx(),
1115 &is_ordinary);
1116 unsigned int orig_st_shndx = st_shndx;
1117 if (!is_ordinary)
1118 orig_st_shndx = elfcpp::SHN_UNDEF;
1119
92de84a6
ILT
1120 if (st_shndx != elfcpp::SHN_UNDEF)
1121 ++*defined;
1122
a783673b
ILT
1123 // A symbol defined in a section which we are not including must
1124 // be treated as an undefined symbol.
880cd20d 1125 bool is_defined_in_discarded_section = false;
a783673b 1126 if (st_shndx != elfcpp::SHN_UNDEF
d491d34e 1127 && is_ordinary
ce97fa81
ST
1128 && !relobj->is_section_included(st_shndx)
1129 && !this->is_section_folded(relobj, st_shndx))
880cd20d
ILT
1130 {
1131 st_shndx = elfcpp::SHN_UNDEF;
1132 is_defined_in_discarded_section = true;
1133 }
a783673b 1134
14bfc3f5
ILT
1135 // In an object file, an '@' in the name separates the symbol
1136 // name from the version name. If there are two '@' characters,
1137 // this is the default version.
2ea97941 1138 const char* ver = strchr(name, '@');
057ead22 1139 Stringpool::Key ver_key = 0;
09124467 1140 int namelen = 0;
8781f709
ILT
1141 // IS_DEFAULT_VERSION: is the version default?
1142 // IS_FORCED_LOCAL: is the symbol forced local?
1143 bool is_default_version = false;
1144 bool is_forced_local = false;
09124467
ILT
1145
1146 if (ver != NULL)
1147 {
1148 // The symbol name is of the form foo@VERSION or foo@@VERSION
2ea97941 1149 namelen = ver - name;
09124467
ILT
1150 ++ver;
1151 if (*ver == '@')
1152 {
8781f709 1153 is_default_version = true;
09124467
ILT
1154 ++ver;
1155 }
057ead22 1156 ver = this->namepool_.add(ver, true, &ver_key);
09124467 1157 }
5871526f
ILT
1158 // We don't want to assign a version to an undefined symbol,
1159 // even if it is listed in the version script. FIXME: What
1160 // about a common symbol?
057ead22
ILT
1161 else
1162 {
2ea97941 1163 namelen = strlen(name);
057ead22
ILT
1164 if (!this->version_script_.empty()
1165 && st_shndx != elfcpp::SHN_UNDEF)
1166 {
1167 // The symbol name did not have a version, but the
1168 // version script may assign a version anyway.
2ea97941 1169 std::string version;
98e090bd
ILT
1170 bool is_global;
1171 if (this->version_script_.get_symbol_version(name, &version,
1172 &is_global))
057ead22 1173 {
98e090bd
ILT
1174 if (!is_global)
1175 is_forced_local = true;
1176 else if (!version.empty())
057ead22 1177 {
2ea97941
ILT
1178 ver = this->namepool_.add_with_length(version.c_str(),
1179 version.length(),
057ead22
ILT
1180 true,
1181 &ver_key);
8781f709 1182 is_default_version = true;
057ead22
ILT
1183 }
1184 }
057ead22
ILT
1185 }
1186 }
14bfc3f5 1187
d491d34e
ILT
1188 elfcpp::Sym<size, big_endian>* psym = &sym;
1189 unsigned char symbuf[sym_size];
1190 elfcpp::Sym<size, big_endian> sym2(symbuf);
88dd47ac
ILT
1191 if (just_symbols)
1192 {
d491d34e 1193 memcpy(symbuf, p, sym_size);
88dd47ac 1194 elfcpp::Sym_write<size, big_endian> sw(symbuf);
d491d34e 1195 if (orig_st_shndx != elfcpp::SHN_UNDEF && is_ordinary)
88dd47ac
ILT
1196 {
1197 // Symbol values in object files are section relative.
1198 // This is normally what we want, but since here we are
1199 // converting the symbol to absolute we need to add the
1200 // section address. The section address in an object
1201 // file is normally zero, but people can use a linker
1202 // script to change it.
d491d34e
ILT
1203 sw.put_st_value(sym.get_st_value()
1204 + relobj->section_address(orig_st_shndx));
88dd47ac 1205 }
d491d34e
ILT
1206 st_shndx = elfcpp::SHN_ABS;
1207 is_ordinary = false;
88dd47ac
ILT
1208 psym = &sym2;
1209 }
1210
65514900 1211 // Fix up visibility if object has no-export set.
1c74fab0
ILT
1212 if (relobj->no_export()
1213 && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary))
65514900
CC
1214 {
1215 // We may have copied symbol already above.
1216 if (psym != &sym2)
1217 {
1218 memcpy(symbuf, p, sym_size);
1219 psym = &sym2;
1220 }
1221
1222 elfcpp::STV visibility = sym2.get_st_visibility();
1223 if (visibility == elfcpp::STV_DEFAULT
1224 || visibility == elfcpp::STV_PROTECTED)
1225 {
1226 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1227 unsigned char nonvis = sym2.get_st_nonvis();
1228 sw.put_st_other(elfcpp::STV_HIDDEN, nonvis);
1229 }
1230 }
1231
057ead22 1232 Stringpool::Key name_key;
2ea97941 1233 name = this->namepool_.add_with_length(name, namelen, true,
057ead22
ILT
1234 &name_key);
1235
aeddab66 1236 Sized_symbol<size>* res;
2ea97941 1237 res = this->add_from_object(relobj, name, name_key, ver, ver_key,
8781f709
ILT
1238 is_default_version, *psym, st_shndx,
1239 is_ordinary, orig_st_shndx);
6d03d481
ST
1240
1241 // If building a shared library using garbage collection, do not
1242 // treat externally visible symbols as garbage.
1243 if (parameters->options().gc_sections()
1244 && parameters->options().shared())
1245 this->gc_mark_symbol_for_shlib(res);
f0641a0b 1246
8781f709 1247 if (is_forced_local)
057ead22 1248 this->force_local(res);
14bfc3f5 1249
880cd20d
ILT
1250 if (is_defined_in_discarded_section)
1251 res->set_is_defined_in_discarded_section();
1252
730cdc88 1253 (*sympointers)[i] = res;
14bfc3f5
ILT
1254 }
1255}
1256
89fc3421
CC
1257// Add a symbol from a plugin-claimed file.
1258
1259template<int size, bool big_endian>
1260Symbol*
1261Symbol_table::add_from_pluginobj(
1262 Sized_pluginobj<size, big_endian>* obj,
2ea97941 1263 const char* name,
89fc3421
CC
1264 const char* ver,
1265 elfcpp::Sym<size, big_endian>* sym)
1266{
1267 unsigned int st_shndx = sym->get_st_shndx();
24998053 1268 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
89fc3421
CC
1269
1270 Stringpool::Key ver_key = 0;
8781f709
ILT
1271 bool is_default_version = false;
1272 bool is_forced_local = false;
89fc3421
CC
1273
1274 if (ver != NULL)
1275 {
1276 ver = this->namepool_.add(ver, true, &ver_key);
1277 }
1278 // We don't want to assign a version to an undefined symbol,
1279 // even if it is listed in the version script. FIXME: What
1280 // about a common symbol?
1281 else
1282 {
1283 if (!this->version_script_.empty()
1284 && st_shndx != elfcpp::SHN_UNDEF)
1285 {
1286 // The symbol name did not have a version, but the
1287 // version script may assign a version anyway.
2ea97941 1288 std::string version;
98e090bd
ILT
1289 bool is_global;
1290 if (this->version_script_.get_symbol_version(name, &version,
1291 &is_global))
89fc3421 1292 {
98e090bd
ILT
1293 if (!is_global)
1294 is_forced_local = true;
1295 else if (!version.empty())
89fc3421 1296 {
2ea97941
ILT
1297 ver = this->namepool_.add_with_length(version.c_str(),
1298 version.length(),
89fc3421
CC
1299 true,
1300 &ver_key);
8781f709 1301 is_default_version = true;
89fc3421
CC
1302 }
1303 }
89fc3421
CC
1304 }
1305 }
1306
1307 Stringpool::Key name_key;
2ea97941 1308 name = this->namepool_.add(name, true, &name_key);
89fc3421
CC
1309
1310 Sized_symbol<size>* res;
2ea97941 1311 res = this->add_from_object(obj, name, name_key, ver, ver_key,
8781f709
ILT
1312 is_default_version, *sym, st_shndx,
1313 is_ordinary, st_shndx);
89fc3421 1314
8781f709 1315 if (is_forced_local)
0602e05a 1316 this->force_local(res);
89fc3421
CC
1317
1318 return res;
1319}
1320
dbe717ef
ILT
1321// Add all the symbols in a dynamic object to the hash table.
1322
1323template<int size, bool big_endian>
1324void
1325Symbol_table::add_from_dynobj(
1326 Sized_dynobj<size, big_endian>* dynobj,
1327 const unsigned char* syms,
1328 size_t count,
1329 const char* sym_names,
1330 size_t sym_name_size,
1331 const unsigned char* versym,
1332 size_t versym_size,
92de84a6 1333 const std::vector<const char*>* version_map,
6fa2a40b 1334 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
92de84a6 1335 size_t* defined)
dbe717ef 1336{
92de84a6
ILT
1337 *defined = 0;
1338
8851ecca 1339 gold_assert(size == parameters->target().get_size());
dbe717ef 1340
88dd47ac
ILT
1341 if (dynobj->just_symbols())
1342 {
1343 gold_error(_("--just-symbols does not make sense with a shared object"));
1344 return;
1345 }
1346
dbe717ef
ILT
1347 if (versym != NULL && versym_size / 2 < count)
1348 {
75f2446e
ILT
1349 dynobj->error(_("too few symbol versions"));
1350 return;
dbe717ef
ILT
1351 }
1352
1353 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1354
aeddab66
ILT
1355 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1356 // weak aliases. This is necessary because if the dynamic object
1357 // provides the same variable under two names, one of which is a
1358 // weak definition, and the regular object refers to the weak
1359 // definition, we have to put both the weak definition and the
1360 // strong definition into the dynamic symbol table. Given a weak
1361 // definition, the only way that we can find the corresponding
1362 // strong definition, if any, is to search the symbol table.
1363 std::vector<Sized_symbol<size>*> object_symbols;
1364
dbe717ef
ILT
1365 const unsigned char* p = syms;
1366 const unsigned char* vs = versym;
1367 for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
1368 {
1369 elfcpp::Sym<size, big_endian> sym(p);
1370
92de84a6
ILT
1371 if (sympointers != NULL)
1372 (*sympointers)[i] = NULL;
1373
65778909
ILT
1374 // Ignore symbols with local binding or that have
1375 // internal or hidden visibility.
1376 if (sym.get_st_bind() == elfcpp::STB_LOCAL
1377 || sym.get_st_visibility() == elfcpp::STV_INTERNAL
1378 || sym.get_st_visibility() == elfcpp::STV_HIDDEN)
dbe717ef
ILT
1379 continue;
1380
8bdcdf2c
ILT
1381 // A protected symbol in a shared library must be treated as a
1382 // normal symbol when viewed from outside the shared library.
1383 // Implement this by overriding the visibility here.
1384 elfcpp::Sym<size, big_endian>* psym = &sym;
1385 unsigned char symbuf[sym_size];
1386 elfcpp::Sym<size, big_endian> sym2(symbuf);
1387 if (sym.get_st_visibility() == elfcpp::STV_PROTECTED)
1388 {
1389 memcpy(symbuf, p, sym_size);
1390 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1391 sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis());
1392 psym = &sym2;
1393 }
1394
1395 unsigned int st_name = psym->get_st_name();
dbe717ef
ILT
1396 if (st_name >= sym_name_size)
1397 {
75f2446e
ILT
1398 dynobj->error(_("bad symbol name offset %u at %zu"),
1399 st_name, i);
1400 continue;
dbe717ef
ILT
1401 }
1402
2ea97941 1403 const char* name = sym_names + st_name;
dbe717ef 1404
d491d34e 1405 bool is_ordinary;
8bdcdf2c 1406 unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(),
d491d34e
ILT
1407 &is_ordinary);
1408
92de84a6
ILT
1409 if (st_shndx != elfcpp::SHN_UNDEF)
1410 ++*defined;
1411
aeddab66
ILT
1412 Sized_symbol<size>* res;
1413
dbe717ef
ILT
1414 if (versym == NULL)
1415 {
1416 Stringpool::Key name_key;
2ea97941
ILT
1417 name = this->namepool_.add(name, true, &name_key);
1418 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1419 false, *psym, st_shndx, is_ordinary,
d491d34e 1420 st_shndx);
dbe717ef 1421 }
aeddab66
ILT
1422 else
1423 {
1424 // Read the version information.
dbe717ef 1425
aeddab66 1426 unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
dbe717ef 1427
aeddab66
ILT
1428 bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
1429 v &= elfcpp::VERSYM_VERSION;
dbe717ef 1430
aeddab66
ILT
1431 // The Sun documentation says that V can be VER_NDX_LOCAL,
1432 // or VER_NDX_GLOBAL, or a version index. The meaning of
1433 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1434 // The old GNU linker will happily generate VER_NDX_LOCAL
1435 // for an undefined symbol. I don't know what the Sun
1436 // linker will generate.
dbe717ef 1437
aeddab66 1438 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
d491d34e 1439 && st_shndx != elfcpp::SHN_UNDEF)
aeddab66
ILT
1440 {
1441 // This symbol should not be visible outside the object.
1442 continue;
1443 }
64707334 1444
aeddab66
ILT
1445 // At this point we are definitely going to add this symbol.
1446 Stringpool::Key name_key;
2ea97941 1447 name = this->namepool_.add(name, true, &name_key);
dbe717ef 1448
aeddab66
ILT
1449 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1450 || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
1451 {
1452 // This symbol does not have a version.
2ea97941 1453 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1454 false, *psym, st_shndx, is_ordinary,
d491d34e 1455 st_shndx);
aeddab66
ILT
1456 }
1457 else
1458 {
1459 if (v >= version_map->size())
1460 {
1461 dynobj->error(_("versym for symbol %zu out of range: %u"),
1462 i, v);
1463 continue;
1464 }
dbe717ef 1465
2ea97941
ILT
1466 const char* version = (*version_map)[v];
1467 if (version == NULL)
aeddab66
ILT
1468 {
1469 dynobj->error(_("versym for symbol %zu has no name: %u"),
1470 i, v);
1471 continue;
1472 }
dbe717ef 1473
aeddab66 1474 Stringpool::Key version_key;
2ea97941 1475 version = this->namepool_.add(version, true, &version_key);
aeddab66
ILT
1476
1477 // If this is an absolute symbol, and the version name
1478 // and symbol name are the same, then this is the
1479 // version definition symbol. These symbols exist to
1480 // support using -u to pull in particular versions. We
1481 // do not want to record a version for them.
d491d34e
ILT
1482 if (st_shndx == elfcpp::SHN_ABS
1483 && !is_ordinary
aeddab66 1484 && name_key == version_key)
2ea97941 1485 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1486 false, *psym, st_shndx, is_ordinary,
d491d34e 1487 st_shndx);
aeddab66
ILT
1488 else
1489 {
8781f709
ILT
1490 const bool is_default_version =
1491 !hidden && st_shndx != elfcpp::SHN_UNDEF;
2ea97941 1492 res = this->add_from_object(dynobj, name, name_key, version,
8781f709
ILT
1493 version_key, is_default_version,
1494 *psym, st_shndx,
d491d34e 1495 is_ordinary, st_shndx);
aeddab66
ILT
1496 }
1497 }
dbe717ef
ILT
1498 }
1499
99a37bfd 1500 // Note that it is possible that RES was overridden by an
a4bb589a 1501 // earlier object, in which case it can't be aliased here.
d491d34e
ILT
1502 if (st_shndx != elfcpp::SHN_UNDEF
1503 && is_ordinary
8bdcdf2c 1504 && psym->get_st_type() == elfcpp::STT_OBJECT
99a37bfd
ILT
1505 && res->source() == Symbol::FROM_OBJECT
1506 && res->object() == dynobj)
aeddab66 1507 object_symbols.push_back(res);
92de84a6
ILT
1508
1509 if (sympointers != NULL)
1510 (*sympointers)[i] = res;
aeddab66
ILT
1511 }
1512
1513 this->record_weak_aliases(&object_symbols);
1514}
1515
cdc29364
CC
1516// Add a symbol from a incremental object file.
1517
1518template<int size, bool big_endian>
26d3c67d 1519Sized_symbol<size>*
cdc29364
CC
1520Symbol_table::add_from_incrobj(
1521 Object* obj,
1522 const char* name,
1523 const char* ver,
1524 elfcpp::Sym<size, big_endian>* sym)
1525{
1526 unsigned int st_shndx = sym->get_st_shndx();
1527 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
1528
1529 Stringpool::Key ver_key = 0;
1530 bool is_default_version = false;
1531 bool is_forced_local = false;
1532
1533 Stringpool::Key name_key;
1534 name = this->namepool_.add(name, true, &name_key);
1535
1536 Sized_symbol<size>* res;
1537 res = this->add_from_object(obj, name, name_key, ver, ver_key,
1538 is_default_version, *sym, st_shndx,
1539 is_ordinary, st_shndx);
1540
1541 if (is_forced_local)
1542 this->force_local(res);
1543
1544 return res;
1545}
1546
aeddab66
ILT
1547// This is used to sort weak aliases. We sort them first by section
1548// index, then by offset, then by weak ahead of strong.
1549
1550template<int size>
1551class Weak_alias_sorter
1552{
1553 public:
1554 bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const;
1555};
1556
1557template<int size>
1558bool
1559Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1,
1560 const Sized_symbol<size>* s2) const
1561{
d491d34e
ILT
1562 bool is_ordinary;
1563 unsigned int s1_shndx = s1->shndx(&is_ordinary);
1564 gold_assert(is_ordinary);
1565 unsigned int s2_shndx = s2->shndx(&is_ordinary);
1566 gold_assert(is_ordinary);
1567 if (s1_shndx != s2_shndx)
1568 return s1_shndx < s2_shndx;
1569
aeddab66
ILT
1570 if (s1->value() != s2->value())
1571 return s1->value() < s2->value();
1572 if (s1->binding() != s2->binding())
1573 {
1574 if (s1->binding() == elfcpp::STB_WEAK)
1575 return true;
1576 if (s2->binding() == elfcpp::STB_WEAK)
1577 return false;
1578 }
1579 return std::string(s1->name()) < std::string(s2->name());
1580}
dbe717ef 1581
aeddab66
ILT
1582// SYMBOLS is a list of object symbols from a dynamic object. Look
1583// for any weak aliases, and record them so that if we add the weak
1584// alias to the dynamic symbol table, we also add the corresponding
1585// strong symbol.
dbe717ef 1586
aeddab66
ILT
1587template<int size>
1588void
1589Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols)
1590{
1591 // Sort the vector by section index, then by offset, then by weak
1592 // ahead of strong.
1593 std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>());
1594
1595 // Walk through the vector. For each weak definition, record
1596 // aliases.
1597 for (typename std::vector<Sized_symbol<size>*>::const_iterator p =
1598 symbols->begin();
1599 p != symbols->end();
1600 ++p)
1601 {
1602 if ((*p)->binding() != elfcpp::STB_WEAK)
1603 continue;
1604
1605 // Build a circular list of weak aliases. Each symbol points to
1606 // the next one in the circular list.
1607
1608 Sized_symbol<size>* from_sym = *p;
1609 typename std::vector<Sized_symbol<size>*>::const_iterator q;
1610 for (q = p + 1; q != symbols->end(); ++q)
dbe717ef 1611 {
d491d34e
ILT
1612 bool dummy;
1613 if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy)
aeddab66
ILT
1614 || (*q)->value() != from_sym->value())
1615 break;
1616
1617 this->weak_aliases_[from_sym] = *q;
1618 from_sym->set_has_alias();
1619 from_sym = *q;
dbe717ef
ILT
1620 }
1621
aeddab66
ILT
1622 if (from_sym != *p)
1623 {
1624 this->weak_aliases_[from_sym] = *p;
1625 from_sym->set_has_alias();
1626 }
dbe717ef 1627
aeddab66 1628 p = q - 1;
dbe717ef
ILT
1629 }
1630}
1631
ead1e424
ILT
1632// Create and return a specially defined symbol. If ONLY_IF_REF is
1633// true, then only create the symbol if there is a reference to it.
86f2e683 1634// If this does not return NULL, it sets *POLDSYM to the existing
8c500701
ILT
1635// symbol if there is one. This sets *RESOLVE_OLDSYM if we should
1636// resolve the newly created symbol to the old one. This
1637// canonicalizes *PNAME and *PVERSION.
ead1e424
ILT
1638
1639template<int size, bool big_endian>
1640Sized_symbol<size>*
9b07f471
ILT
1641Symbol_table::define_special_symbol(const char** pname, const char** pversion,
1642 bool only_if_ref,
8c500701 1643 Sized_symbol<size>** poldsym,
ca09d69a 1644 bool* resolve_oldsym)
ead1e424 1645{
8c500701 1646 *resolve_oldsym = false;
ead1e424 1647
55a93433
ILT
1648 // If the caller didn't give us a version, see if we get one from
1649 // the version script.
057ead22 1650 std::string v;
8c500701 1651 bool is_default_version = false;
55a93433
ILT
1652 if (*pversion == NULL)
1653 {
98e090bd
ILT
1654 bool is_global;
1655 if (this->version_script_.get_symbol_version(*pname, &v, &is_global))
057ead22 1656 {
98e090bd
ILT
1657 if (is_global && !v.empty())
1658 {
1659 *pversion = v.c_str();
1660 // If we get the version from a version script, then we
1661 // are also the default version.
1662 is_default_version = true;
1663 }
057ead22 1664 }
55a93433
ILT
1665 }
1666
8c500701
ILT
1667 Symbol* oldsym;
1668 Sized_symbol<size>* sym;
1669
1670 bool add_to_table = false;
1671 typename Symbol_table_type::iterator add_loc = this->table_.end();
1672 bool add_def_to_table = false;
1673 typename Symbol_table_type::iterator add_def_loc = this->table_.end();
1674
ead1e424
ILT
1675 if (only_if_ref)
1676 {
306d9ef0 1677 oldsym = this->lookup(*pname, *pversion);
8c500701
ILT
1678 if (oldsym == NULL && is_default_version)
1679 oldsym = this->lookup(*pname, NULL);
f6ce93d6 1680 if (oldsym == NULL || !oldsym->is_undefined())
ead1e424 1681 return NULL;
306d9ef0
ILT
1682
1683 *pname = oldsym->name();
8c500701
ILT
1684 if (!is_default_version)
1685 *pversion = oldsym->version();
ead1e424
ILT
1686 }
1687 else
1688 {
14b31740 1689 // Canonicalize NAME and VERSION.
f0641a0b 1690 Stringpool::Key name_key;
cfd73a4e 1691 *pname = this->namepool_.add(*pname, true, &name_key);
ead1e424 1692
14b31740 1693 Stringpool::Key version_key = 0;
306d9ef0 1694 if (*pversion != NULL)
cfd73a4e 1695 *pversion = this->namepool_.add(*pversion, true, &version_key);
14b31740 1696
ead1e424 1697 Symbol* const snull = NULL;
ead1e424 1698 std::pair<typename Symbol_table_type::iterator, bool> ins =
14b31740
ILT
1699 this->table_.insert(std::make_pair(std::make_pair(name_key,
1700 version_key),
ead1e424
ILT
1701 snull));
1702
8781f709 1703 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
8c500701
ILT
1704 std::make_pair(this->table_.end(), false);
1705 if (is_default_version)
1706 {
1707 const Stringpool::Key vnull = 0;
8781f709
ILT
1708 insdefault =
1709 this->table_.insert(std::make_pair(std::make_pair(name_key,
1710 vnull),
1711 snull));
8c500701
ILT
1712 }
1713
ead1e424
ILT
1714 if (!ins.second)
1715 {
14b31740 1716 // We already have a symbol table entry for NAME/VERSION.
ead1e424 1717 oldsym = ins.first->second;
a3ad94ed 1718 gold_assert(oldsym != NULL);
8c500701
ILT
1719
1720 if (is_default_version)
1721 {
1722 Sized_symbol<size>* soldsym =
1723 this->get_sized_symbol<size>(oldsym);
1724 this->define_default_version<size, big_endian>(soldsym,
8781f709
ILT
1725 insdefault.second,
1726 insdefault.first);
8c500701 1727 }
ead1e424
ILT
1728 }
1729 else
1730 {
1731 // We haven't seen this symbol before.
a3ad94ed 1732 gold_assert(ins.first->second == NULL);
8c500701
ILT
1733
1734 add_to_table = true;
1735 add_loc = ins.first;
1736
8781f709 1737 if (is_default_version && !insdefault.second)
8c500701
ILT
1738 {
1739 // We are adding NAME/VERSION, and it is the default
1740 // version. We already have an entry for NAME/NULL.
8781f709 1741 oldsym = insdefault.first->second;
8c500701
ILT
1742 *resolve_oldsym = true;
1743 }
1744 else
1745 {
1746 oldsym = NULL;
1747
1748 if (is_default_version)
1749 {
1750 add_def_to_table = true;
8781f709 1751 add_def_loc = insdefault.first;
8c500701
ILT
1752 }
1753 }
ead1e424
ILT
1754 }
1755 }
1756
8851ecca
ILT
1757 const Target& target = parameters->target();
1758 if (!target.has_make_symbol())
86f2e683
ILT
1759 sym = new Sized_symbol<size>();
1760 else
ead1e424 1761 {
029ba973
ILT
1762 Sized_target<size, big_endian>* sized_target =
1763 parameters->sized_target<size, big_endian>();
86f2e683
ILT
1764 sym = sized_target->make_symbol();
1765 if (sym == NULL)
1766 return NULL;
1767 }
ead1e424 1768
86f2e683
ILT
1769 if (add_to_table)
1770 add_loc->second = sym;
1771 else
1772 gold_assert(oldsym != NULL);
ead1e424 1773
8c500701
ILT
1774 if (add_def_to_table)
1775 add_def_loc->second = sym;
1776
7d1a9ebb 1777 *poldsym = this->get_sized_symbol<size>(oldsym);
ead1e424
ILT
1778
1779 return sym;
1780}
1781
1782// Define a symbol based on an Output_data.
1783
14b31740 1784Symbol*
2ea97941
ILT
1785Symbol_table::define_in_output_data(const char* name,
1786 const char* version,
99fff23b 1787 Defined defined,
9b07f471 1788 Output_data* od,
2ea97941
ILT
1789 uint64_t value,
1790 uint64_t symsize,
9b07f471
ILT
1791 elfcpp::STT type,
1792 elfcpp::STB binding,
ead1e424
ILT
1793 elfcpp::STV visibility,
1794 unsigned char nonvis,
2ea97941 1795 bool offset_is_from_end,
ead1e424
ILT
1796 bool only_if_ref)
1797{
8851ecca 1798 if (parameters->target().get_size() == 32)
86f2e683
ILT
1799 {
1800#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1801 return this->do_define_in_output_data<32>(name, version, defined, od,
2ea97941 1802 value, symsize, type, binding,
86f2e683 1803 visibility, nonvis,
2ea97941 1804 offset_is_from_end,
86f2e683
ILT
1805 only_if_ref);
1806#else
1807 gold_unreachable();
1808#endif
1809 }
8851ecca 1810 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1811 {
1812#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1813 return this->do_define_in_output_data<64>(name, version, defined, od,
2ea97941 1814 value, symsize, type, binding,
86f2e683 1815 visibility, nonvis,
2ea97941 1816 offset_is_from_end,
86f2e683
ILT
1817 only_if_ref);
1818#else
1819 gold_unreachable();
1820#endif
1821 }
ead1e424 1822 else
a3ad94ed 1823 gold_unreachable();
ead1e424
ILT
1824}
1825
1826// Define a symbol in an Output_data, sized version.
1827
1828template<int size>
14b31740 1829Sized_symbol<size>*
ead1e424 1830Symbol_table::do_define_in_output_data(
2ea97941
ILT
1831 const char* name,
1832 const char* version,
99fff23b 1833 Defined defined,
ead1e424 1834 Output_data* od,
2ea97941
ILT
1835 typename elfcpp::Elf_types<size>::Elf_Addr value,
1836 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1837 elfcpp::STT type,
1838 elfcpp::STB binding,
1839 elfcpp::STV visibility,
1840 unsigned char nonvis,
2ea97941 1841 bool offset_is_from_end,
ead1e424
ILT
1842 bool only_if_ref)
1843{
1844 Sized_symbol<size>* sym;
86f2e683 1845 Sized_symbol<size>* oldsym;
8c500701 1846 bool resolve_oldsym;
ead1e424 1847
8851ecca 1848 if (parameters->target().is_big_endian())
193a53d9
ILT
1849 {
1850#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 1851 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
1852 only_if_ref, &oldsym,
1853 &resolve_oldsym);
193a53d9
ILT
1854#else
1855 gold_unreachable();
1856#endif
1857 }
ead1e424 1858 else
193a53d9
ILT
1859 {
1860#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 1861 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
1862 only_if_ref, &oldsym,
1863 &resolve_oldsym);
193a53d9
ILT
1864#else
1865 gold_unreachable();
1866#endif
1867 }
ead1e424
ILT
1868
1869 if (sym == NULL)
14b31740 1870 return NULL;
ead1e424 1871
2ea97941 1872 sym->init_output_data(name, version, od, value, symsize, type, binding,
5146f448
CC
1873 visibility, nonvis, offset_is_from_end,
1874 defined == PREDEFINED);
14b31740 1875
e5756efb 1876 if (oldsym == NULL)
55a93433
ILT
1877 {
1878 if (binding == elfcpp::STB_LOCAL
2ea97941 1879 || this->version_script_.symbol_is_local(name))
55a93433 1880 this->force_local(sym);
2ea97941 1881 else if (version != NULL)
75517b77 1882 sym->set_is_default();
55a93433
ILT
1883 return sym;
1884 }
86f2e683 1885
62855347 1886 if (Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 1887 this->override_with_special(oldsym, sym);
8c500701
ILT
1888
1889 if (resolve_oldsym)
1890 return sym;
1891 else
1892 {
1893 delete sym;
1894 return oldsym;
1895 }
ead1e424
ILT
1896}
1897
1898// Define a symbol based on an Output_segment.
1899
14b31740 1900Symbol*
2ea97941 1901Symbol_table::define_in_output_segment(const char* name,
99fff23b
ILT
1902 const char* version,
1903 Defined defined,
1904 Output_segment* os,
2ea97941
ILT
1905 uint64_t value,
1906 uint64_t symsize,
9b07f471
ILT
1907 elfcpp::STT type,
1908 elfcpp::STB binding,
ead1e424
ILT
1909 elfcpp::STV visibility,
1910 unsigned char nonvis,
2ea97941 1911 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1912 bool only_if_ref)
1913{
8851ecca 1914 if (parameters->target().get_size() == 32)
86f2e683
ILT
1915 {
1916#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1917 return this->do_define_in_output_segment<32>(name, version, defined, os,
2ea97941 1918 value, symsize, type,
86f2e683 1919 binding, visibility, nonvis,
2ea97941 1920 offset_base, only_if_ref);
86f2e683
ILT
1921#else
1922 gold_unreachable();
1923#endif
1924 }
8851ecca 1925 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1926 {
1927#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1928 return this->do_define_in_output_segment<64>(name, version, defined, os,
2ea97941 1929 value, symsize, type,
86f2e683 1930 binding, visibility, nonvis,
2ea97941 1931 offset_base, only_if_ref);
86f2e683
ILT
1932#else
1933 gold_unreachable();
1934#endif
1935 }
ead1e424 1936 else
a3ad94ed 1937 gold_unreachable();
ead1e424
ILT
1938}
1939
1940// Define a symbol in an Output_segment, sized version.
1941
1942template<int size>
14b31740 1943Sized_symbol<size>*
ead1e424 1944Symbol_table::do_define_in_output_segment(
2ea97941
ILT
1945 const char* name,
1946 const char* version,
99fff23b 1947 Defined defined,
ead1e424 1948 Output_segment* os,
2ea97941
ILT
1949 typename elfcpp::Elf_types<size>::Elf_Addr value,
1950 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1951 elfcpp::STT type,
1952 elfcpp::STB binding,
1953 elfcpp::STV visibility,
1954 unsigned char nonvis,
2ea97941 1955 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1956 bool only_if_ref)
1957{
1958 Sized_symbol<size>* sym;
86f2e683 1959 Sized_symbol<size>* oldsym;
8c500701 1960 bool resolve_oldsym;
ead1e424 1961
8851ecca 1962 if (parameters->target().is_big_endian())
9025d29d
ILT
1963 {
1964#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 1965 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
1966 only_if_ref, &oldsym,
1967 &resolve_oldsym);
9025d29d
ILT
1968#else
1969 gold_unreachable();
1970#endif
1971 }
ead1e424 1972 else
9025d29d
ILT
1973 {
1974#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 1975 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
1976 only_if_ref, &oldsym,
1977 &resolve_oldsym);
9025d29d
ILT
1978#else
1979 gold_unreachable();
1980#endif
1981 }
ead1e424
ILT
1982
1983 if (sym == NULL)
14b31740 1984 return NULL;
ead1e424 1985
2ea97941 1986 sym->init_output_segment(name, version, os, value, symsize, type, binding,
5146f448
CC
1987 visibility, nonvis, offset_base,
1988 defined == PREDEFINED);
14b31740 1989
e5756efb 1990 if (oldsym == NULL)
55a93433
ILT
1991 {
1992 if (binding == elfcpp::STB_LOCAL
2ea97941 1993 || this->version_script_.symbol_is_local(name))
55a93433 1994 this->force_local(sym);
2ea97941 1995 else if (version != NULL)
75517b77 1996 sym->set_is_default();
55a93433
ILT
1997 return sym;
1998 }
86f2e683 1999
62855347 2000 if (Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 2001 this->override_with_special(oldsym, sym);
8c500701
ILT
2002
2003 if (resolve_oldsym)
2004 return sym;
2005 else
2006 {
2007 delete sym;
2008 return oldsym;
2009 }
ead1e424
ILT
2010}
2011
2012// Define a special symbol with a constant value. It is a multiple
2013// definition error if this symbol is already defined.
2014
14b31740 2015Symbol*
2ea97941
ILT
2016Symbol_table::define_as_constant(const char* name,
2017 const char* version,
99fff23b 2018 Defined defined,
2ea97941
ILT
2019 uint64_t value,
2020 uint64_t symsize,
9b07f471
ILT
2021 elfcpp::STT type,
2022 elfcpp::STB binding,
2023 elfcpp::STV visibility,
2024 unsigned char nonvis,
caa9d5d9
ILT
2025 bool only_if_ref,
2026 bool force_override)
ead1e424 2027{
8851ecca 2028 if (parameters->target().get_size() == 32)
86f2e683
ILT
2029 {
2030#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 2031 return this->do_define_as_constant<32>(name, version, defined, value,
2ea97941 2032 symsize, type, binding,
caa9d5d9
ILT
2033 visibility, nonvis, only_if_ref,
2034 force_override);
86f2e683
ILT
2035#else
2036 gold_unreachable();
2037#endif
2038 }
8851ecca 2039 else if (parameters->target().get_size() == 64)
86f2e683
ILT
2040 {
2041#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 2042 return this->do_define_as_constant<64>(name, version, defined, value,
2ea97941 2043 symsize, type, binding,
caa9d5d9
ILT
2044 visibility, nonvis, only_if_ref,
2045 force_override);
86f2e683
ILT
2046#else
2047 gold_unreachable();
2048#endif
2049 }
ead1e424 2050 else
a3ad94ed 2051 gold_unreachable();
ead1e424
ILT
2052}
2053
2054// Define a symbol as a constant, sized version.
2055
2056template<int size>
14b31740 2057Sized_symbol<size>*
ead1e424 2058Symbol_table::do_define_as_constant(
2ea97941
ILT
2059 const char* name,
2060 const char* version,
99fff23b 2061 Defined defined,
2ea97941
ILT
2062 typename elfcpp::Elf_types<size>::Elf_Addr value,
2063 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
2064 elfcpp::STT type,
2065 elfcpp::STB binding,
2066 elfcpp::STV visibility,
2067 unsigned char nonvis,
caa9d5d9
ILT
2068 bool only_if_ref,
2069 bool force_override)
ead1e424
ILT
2070{
2071 Sized_symbol<size>* sym;
86f2e683 2072 Sized_symbol<size>* oldsym;
8c500701 2073 bool resolve_oldsym;
ead1e424 2074
8851ecca 2075 if (parameters->target().is_big_endian())
9025d29d
ILT
2076 {
2077#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 2078 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
2079 only_if_ref, &oldsym,
2080 &resolve_oldsym);
9025d29d
ILT
2081#else
2082 gold_unreachable();
2083#endif
2084 }
ead1e424 2085 else
9025d29d
ILT
2086 {
2087#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 2088 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
2089 only_if_ref, &oldsym,
2090 &resolve_oldsym);
9025d29d
ILT
2091#else
2092 gold_unreachable();
2093#endif
2094 }
ead1e424
ILT
2095
2096 if (sym == NULL)
14b31740 2097 return NULL;
ead1e424 2098
2ea97941 2099 sym->init_constant(name, version, value, symsize, type, binding, visibility,
5146f448 2100 nonvis, defined == PREDEFINED);
14b31740 2101
e5756efb 2102 if (oldsym == NULL)
55a93433 2103 {
686c8caf
ILT
2104 // Version symbols are absolute symbols with name == version.
2105 // We don't want to force them to be local.
2ea97941
ILT
2106 if ((version == NULL
2107 || name != version
2108 || value != 0)
686c8caf 2109 && (binding == elfcpp::STB_LOCAL
2ea97941 2110 || this->version_script_.symbol_is_local(name)))
55a93433 2111 this->force_local(sym);
2ea97941
ILT
2112 else if (version != NULL
2113 && (name != version || value != 0))
75517b77 2114 sym->set_is_default();
55a93433
ILT
2115 return sym;
2116 }
86f2e683 2117
99fff23b 2118 if (force_override
62855347 2119 || Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 2120 this->override_with_special(oldsym, sym);
8c500701
ILT
2121
2122 if (resolve_oldsym)
2123 return sym;
2124 else
2125 {
2126 delete sym;
2127 return oldsym;
2128 }
ead1e424
ILT
2129}
2130
2131// Define a set of symbols in output sections.
2132
2133void
9b07f471 2134Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2135 const Define_symbol_in_section* p,
2136 bool only_if_ref)
ead1e424
ILT
2137{
2138 for (int i = 0; i < count; ++i, ++p)
2139 {
2140 Output_section* os = layout->find_output_section(p->output_section);
2141 if (os != NULL)
99fff23b 2142 this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2143 p->size, p->type, p->binding,
2144 p->visibility, p->nonvis,
a445fddf
ILT
2145 p->offset_is_from_end,
2146 only_if_ref || p->only_if_ref);
ead1e424 2147 else
99fff23b
ILT
2148 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2149 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2150 only_if_ref || p->only_if_ref,
2151 false);
ead1e424
ILT
2152 }
2153}
2154
2155// Define a set of symbols in output segments.
2156
2157void
9b07f471 2158Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2159 const Define_symbol_in_segment* p,
2160 bool only_if_ref)
ead1e424
ILT
2161{
2162 for (int i = 0; i < count; ++i, ++p)
2163 {
2164 Output_segment* os = layout->find_output_segment(p->segment_type,
2165 p->segment_flags_set,
2166 p->segment_flags_clear);
2167 if (os != NULL)
99fff23b 2168 this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2169 p->size, p->type, p->binding,
2170 p->visibility, p->nonvis,
a445fddf
ILT
2171 p->offset_base,
2172 only_if_ref || p->only_if_ref);
ead1e424 2173 else
99fff23b
ILT
2174 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2175 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2176 only_if_ref || p->only_if_ref,
2177 false);
ead1e424
ILT
2178 }
2179}
2180
46fe1623
ILT
2181// Define CSYM using a COPY reloc. POSD is the Output_data where the
2182// symbol should be defined--typically a .dyn.bss section. VALUE is
2183// the offset within POSD.
2184
2185template<int size>
2186void
fe8718a4 2187Symbol_table::define_with_copy_reloc(
fe8718a4
ILT
2188 Sized_symbol<size>* csym,
2189 Output_data* posd,
2ea97941 2190 typename elfcpp::Elf_types<size>::Elf_Addr value)
46fe1623
ILT
2191{
2192 gold_assert(csym->is_from_dynobj());
2193 gold_assert(!csym->is_copied_from_dynobj());
2ea97941
ILT
2194 Object* object = csym->object();
2195 gold_assert(object->is_dynamic());
2196 Dynobj* dynobj = static_cast<Dynobj*>(object);
46fe1623
ILT
2197
2198 // Our copied variable has to override any variable in a shared
2199 // library.
2200 elfcpp::STB binding = csym->binding();
2201 if (binding == elfcpp::STB_WEAK)
2202 binding = elfcpp::STB_GLOBAL;
2203
99fff23b 2204 this->define_in_output_data(csym->name(), csym->version(), COPY,
2ea97941 2205 posd, value, csym->symsize(),
46fe1623
ILT
2206 csym->type(), binding,
2207 csym->visibility(), csym->nonvis(),
2208 false, false);
2209
2210 csym->set_is_copied_from_dynobj();
2211 csym->set_needs_dynsym_entry();
2212
2213 this->copied_symbol_dynobjs_[csym] = dynobj;
2214
2215 // We have now defined all aliases, but we have not entered them all
2216 // in the copied_symbol_dynobjs_ map.
2217 if (csym->has_alias())
2218 {
2219 Symbol* sym = csym;
2220 while (true)
2221 {
2222 sym = this->weak_aliases_[sym];
2223 if (sym == csym)
2224 break;
2225 gold_assert(sym->output_data() == posd);
2226
2227 sym->set_is_copied_from_dynobj();
2228 this->copied_symbol_dynobjs_[sym] = dynobj;
2229 }
2230 }
2231}
2232
2233// SYM is defined using a COPY reloc. Return the dynamic object where
2234// the original definition was found.
2235
2236Dynobj*
2237Symbol_table::get_copy_source(const Symbol* sym) const
2238{
2239 gold_assert(sym->is_copied_from_dynobj());
2240 Copied_symbol_dynobjs::const_iterator p =
2241 this->copied_symbol_dynobjs_.find(sym);
2242 gold_assert(p != this->copied_symbol_dynobjs_.end());
2243 return p->second;
2244}
2245
f3e9c5c5
ILT
2246// Add any undefined symbols named on the command line.
2247
2248void
88a4108b 2249Symbol_table::add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5 2250{
88a4108b
ILT
2251 if (parameters->options().any_undefined()
2252 || layout->script_options()->any_unreferenced())
f3e9c5c5
ILT
2253 {
2254 if (parameters->target().get_size() == 32)
2255 {
5adf9721 2256#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
88a4108b 2257 this->do_add_undefined_symbols_from_command_line<32>(layout);
f3e9c5c5
ILT
2258#else
2259 gold_unreachable();
2260#endif
2261 }
2262 else if (parameters->target().get_size() == 64)
2263 {
2264#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
88a4108b 2265 this->do_add_undefined_symbols_from_command_line<64>(layout);
f3e9c5c5
ILT
2266#else
2267 gold_unreachable();
2268#endif
2269 }
2270 else
2271 gold_unreachable();
2272 }
2273}
2274
2275template<int size>
2276void
88a4108b 2277Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5
ILT
2278{
2279 for (options::String_set::const_iterator p =
2280 parameters->options().undefined_begin();
2281 p != parameters->options().undefined_end();
2282 ++p)
88a4108b 2283 this->add_undefined_symbol_from_command_line<size>(p->c_str());
f3e9c5c5 2284
88a4108b
ILT
2285 for (Script_options::referenced_const_iterator p =
2286 layout->script_options()->referenced_begin();
2287 p != layout->script_options()->referenced_end();
2288 ++p)
2289 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2290}
2291
2292template<int size>
2293void
2294Symbol_table::add_undefined_symbol_from_command_line(const char* name)
2295{
2296 if (this->lookup(name) != NULL)
2297 return;
f3e9c5c5 2298
88a4108b 2299 const char* version = NULL;
f3e9c5c5 2300
88a4108b
ILT
2301 Sized_symbol<size>* sym;
2302 Sized_symbol<size>* oldsym;
2303 bool resolve_oldsym;
2304 if (parameters->target().is_big_endian())
2305 {
f3e9c5c5 2306#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
88a4108b
ILT
2307 sym = this->define_special_symbol<size, true>(&name, &version,
2308 false, &oldsym,
2309 &resolve_oldsym);
f3e9c5c5 2310#else
88a4108b 2311 gold_unreachable();
f3e9c5c5 2312#endif
88a4108b
ILT
2313 }
2314 else
2315 {
f3e9c5c5 2316#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
88a4108b
ILT
2317 sym = this->define_special_symbol<size, false>(&name, &version,
2318 false, &oldsym,
2319 &resolve_oldsym);
f3e9c5c5 2320#else
88a4108b 2321 gold_unreachable();
f3e9c5c5 2322#endif
88a4108b 2323 }
f3e9c5c5 2324
88a4108b 2325 gold_assert(oldsym == NULL);
f3e9c5c5 2326
88a4108b
ILT
2327 sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
2328 elfcpp::STV_DEFAULT, 0);
2329 ++this->saw_undefined_;
f3e9c5c5
ILT
2330}
2331
a3ad94ed
ILT
2332// Set the dynamic symbol indexes. INDEX is the index of the first
2333// global dynamic symbol. Pointers to the symbols are stored into the
2334// vector SYMS. The names are added to DYNPOOL. This returns an
2335// updated dynamic symbol index.
2336
2337unsigned int
9b07f471 2338Symbol_table::set_dynsym_indexes(unsigned int index,
a3ad94ed 2339 std::vector<Symbol*>* syms,
14b31740
ILT
2340 Stringpool* dynpool,
2341 Versions* versions)
a3ad94ed
ILT
2342{
2343 for (Symbol_table_type::iterator p = this->table_.begin();
2344 p != this->table_.end();
2345 ++p)
2346 {
2347 Symbol* sym = p->second;
16649710
ILT
2348
2349 // Note that SYM may already have a dynamic symbol index, since
2350 // some symbols appear more than once in the symbol table, with
2351 // and without a version.
2352
ce97fa81 2353 if (!sym->should_add_dynsym_entry(this))
16649710
ILT
2354 sym->set_dynsym_index(-1U);
2355 else if (!sym->has_dynsym_index())
a3ad94ed
ILT
2356 {
2357 sym->set_dynsym_index(index);
2358 ++index;
2359 syms->push_back(sym);
cfd73a4e 2360 dynpool->add(sym->name(), false, NULL);
14b31740
ILT
2361
2362 // Record any version information.
09124467
ILT
2363 if (sym->version() != NULL)
2364 versions->record_version(this, dynpool, sym);
594c8e5e
ILT
2365
2366 // If the symbol is defined in a dynamic object and is
2367 // referenced in a regular object, then mark the dynamic
2368 // object as needed. This is used to implement --as-needed.
2369 if (sym->is_from_dynobj() && sym->in_reg())
2370 sym->object()->set_is_needed();
a3ad94ed
ILT
2371 }
2372 }
2373
14b31740
ILT
2374 // Finish up the versions. In some cases this may add new dynamic
2375 // symbols.
9b07f471 2376 index = versions->finalize(this, index, syms);
14b31740 2377
a3ad94ed
ILT
2378 return index;
2379}
2380
c06b7b0b 2381// Set the final values for all the symbols. The index of the first
55a93433
ILT
2382// global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
2383// file offset OFF. Add their names to POOL. Return the new file
2384// offset. Update *PLOCAL_SYMCOUNT if necessary.
54dc6425 2385
75f65a3e 2386off_t
55a93433
ILT
2387Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
2388 size_t dyncount, Stringpool* pool,
ca09d69a 2389 unsigned int* plocal_symcount)
54dc6425 2390{
f6ce93d6
ILT
2391 off_t ret;
2392
55a93433
ILT
2393 gold_assert(*plocal_symcount != 0);
2394 this->first_global_index_ = *plocal_symcount;
c06b7b0b 2395
16649710
ILT
2396 this->dynamic_offset_ = dynoff;
2397 this->first_dynamic_global_index_ = dyn_global_index;
2398 this->dynamic_count_ = dyncount;
2399
8851ecca 2400 if (parameters->target().get_size() == 32)
9025d29d
ILT
2401 {
2402#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
55a93433 2403 ret = this->sized_finalize<32>(off, pool, plocal_symcount);
9025d29d
ILT
2404#else
2405 gold_unreachable();
2406#endif
2407 }
8851ecca 2408 else if (parameters->target().get_size() == 64)
9025d29d
ILT
2409 {
2410#if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
55a93433 2411 ret = this->sized_finalize<64>(off, pool, plocal_symcount);
9025d29d
ILT
2412#else
2413 gold_unreachable();
2414#endif
2415 }
61ba1cf9 2416 else
a3ad94ed 2417 gold_unreachable();
f6ce93d6
ILT
2418
2419 // Now that we have the final symbol table, we can reliably note
2420 // which symbols should get warnings.
cb295612 2421 this->warnings_.note_warnings(this);
f6ce93d6
ILT
2422
2423 return ret;
75f65a3e
ILT
2424}
2425
55a93433
ILT
2426// SYM is going into the symbol table at *PINDEX. Add the name to
2427// POOL, update *PINDEX and *POFF.
2428
2429template<int size>
2430void
2431Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool,
2432 unsigned int* pindex, off_t* poff)
2433{
2434 sym->set_symtab_index(*pindex);
6d1c4efb
ILT
2435 if (sym->version() == NULL || !parameters->options().relocatable())
2436 pool->add(sym->name(), false, NULL);
2437 else
2438 pool->add(sym->versioned_name(), true, NULL);
55a93433
ILT
2439 ++*pindex;
2440 *poff += elfcpp::Elf_sizes<size>::sym_size;
2441}
2442
ead1e424
ILT
2443// Set the final value for all the symbols. This is called after
2444// Layout::finalize, so all the output sections have their final
2445// address.
75f65a3e
ILT
2446
2447template<int size>
2448off_t
55a93433
ILT
2449Symbol_table::sized_finalize(off_t off, Stringpool* pool,
2450 unsigned int* plocal_symcount)
75f65a3e 2451{
ead1e424 2452 off = align_address(off, size >> 3);
75f65a3e
ILT
2453 this->offset_ = off;
2454
55a93433
ILT
2455 unsigned int index = *plocal_symcount;
2456 const unsigned int orig_index = index;
c06b7b0b 2457
55a93433
ILT
2458 // First do all the symbols which have been forced to be local, as
2459 // they must appear before all global symbols.
2460 for (Forced_locals::iterator p = this->forced_locals_.begin();
2461 p != this->forced_locals_.end();
2462 ++p)
2463 {
2464 Symbol* sym = *p;
2465 gold_assert(sym->is_forced_local());
2466 if (this->sized_finalize_symbol<size>(sym))
2467 {
2468 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2469 ++*plocal_symcount;
2470 }
2471 }
2472
2473 // Now do all the remaining symbols.
c06b7b0b
ILT
2474 for (Symbol_table_type::iterator p = this->table_.begin();
2475 p != this->table_.end();
2476 ++p)
54dc6425 2477 {
55a93433
ILT
2478 Symbol* sym = p->second;
2479 if (this->sized_finalize_symbol<size>(sym))
2480 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2481 }
54dc6425 2482
55a93433 2483 this->output_count_ = index - orig_index;
a3ad94ed 2484
55a93433
ILT
2485 return off;
2486}
75f65a3e 2487
c0a62865
DK
2488// Compute the final value of SYM and store status in location PSTATUS.
2489// During relaxation, this may be called multiple times for a symbol to
2490// compute its would-be final value in each relaxation pass.
008db82e 2491
55a93433 2492template<int size>
c0a62865
DK
2493typename Sized_symbol<size>::Value_type
2494Symbol_table::compute_final_value(
2495 const Sized_symbol<size>* sym,
2496 Compute_final_value_status* pstatus) const
55a93433 2497{
ef9beddf 2498 typedef typename Sized_symbol<size>::Value_type Value_type;
2ea97941 2499 Value_type value;
ead1e424 2500
55a93433
ILT
2501 switch (sym->source())
2502 {
2503 case Symbol::FROM_OBJECT:
2504 {
d491d34e 2505 bool is_ordinary;
2ea97941 2506 unsigned int shndx = sym->shndx(&is_ordinary);
ead1e424 2507
d491d34e 2508 if (!is_ordinary
2ea97941
ILT
2509 && shndx != elfcpp::SHN_ABS
2510 && !Symbol::is_common_shndx(shndx))
55a93433 2511 {
c0a62865
DK
2512 *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION;
2513 return 0;
ead1e424 2514 }
ead1e424 2515
55a93433
ILT
2516 Object* symobj = sym->object();
2517 if (symobj->is_dynamic())
ead1e424 2518 {
2ea97941
ILT
2519 value = 0;
2520 shndx = elfcpp::SHN_UNDEF;
ead1e424 2521 }
89fc3421
CC
2522 else if (symobj->pluginobj() != NULL)
2523 {
2ea97941
ILT
2524 value = 0;
2525 shndx = elfcpp::SHN_UNDEF;
89fc3421 2526 }
2ea97941
ILT
2527 else if (shndx == elfcpp::SHN_UNDEF)
2528 value = 0;
d491d34e 2529 else if (!is_ordinary
2ea97941
ILT
2530 && (shndx == elfcpp::SHN_ABS
2531 || Symbol::is_common_shndx(shndx)))
2532 value = sym->value();
55a93433 2533 else
ead1e424 2534 {
55a93433 2535 Relobj* relobj = static_cast<Relobj*>(symobj);
2ea97941 2536 Output_section* os = relobj->output_section(shndx);
55a93433 2537
2ea97941 2538 if (this->is_section_folded(relobj, shndx))
ef15dade
ST
2539 {
2540 gold_assert(os == NULL);
2541 // Get the os of the section it is folded onto.
2542 Section_id folded = this->icf_->get_folded_section(relobj,
2ea97941 2543 shndx);
ef15dade
ST
2544 gold_assert(folded.first != NULL);
2545 Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first);
d6344fb5
DK
2546 unsigned folded_shndx = folded.second;
2547
2548 os = folded_obj->output_section(folded_shndx);
ef15dade 2549 gold_assert(os != NULL);
d6344fb5
DK
2550
2551 // Replace (relobj, shndx) with canonical ICF input section.
2552 shndx = folded_shndx;
2553 relobj = folded_obj;
ef15dade
ST
2554 }
2555
d6344fb5 2556 uint64_t secoff64 = relobj->output_section_offset(shndx);
ef15dade 2557 if (os == NULL)
ead1e424 2558 {
6d03d481
ST
2559 bool static_or_reloc = (parameters->doing_static_link() ||
2560 parameters->options().relocatable());
2561 gold_assert(static_or_reloc || sym->dynsym_index() == -1U);
2562
c0a62865
DK
2563 *pstatus = CFVS_NO_OUTPUT_SECTION;
2564 return 0;
ead1e424 2565 }
55a93433 2566
eff45813
CC
2567 if (secoff64 == -1ULL)
2568 {
2569 // The section needs special handling (e.g., a merge section).
ef15dade 2570
2ea97941 2571 value = os->output_address(relobj, shndx, sym->value());
eff45813
CC
2572 }
2573 else
2574 {
2575 Value_type secoff =
2576 convert_types<Value_type, uint64_t>(secoff64);
2577 if (sym->type() == elfcpp::STT_TLS)
2ea97941 2578 value = sym->value() + os->tls_offset() + secoff;
eff45813 2579 else
2ea97941 2580 value = sym->value() + os->address() + secoff;
eff45813 2581 }
ead1e424 2582 }
55a93433
ILT
2583 }
2584 break;
2585
2586 case Symbol::IN_OUTPUT_DATA:
2587 {
2588 Output_data* od = sym->output_data();
2ea97941 2589 value = sym->value();
155a0dd7 2590 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2591 value += od->address();
155a0dd7
ILT
2592 else
2593 {
2594 Output_section* os = od->output_section();
2595 gold_assert(os != NULL);
2ea97941 2596 value += os->tls_offset() + (od->address() - os->address());
155a0dd7 2597 }
55a93433 2598 if (sym->offset_is_from_end())
2ea97941 2599 value += od->data_size();
55a93433
ILT
2600 }
2601 break;
2602
2603 case Symbol::IN_OUTPUT_SEGMENT:
2604 {
2605 Output_segment* os = sym->output_segment();
2ea97941 2606 value = sym->value();
edfbb029 2607 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2608 value += os->vaddr();
55a93433
ILT
2609 switch (sym->offset_base())
2610 {
2611 case Symbol::SEGMENT_START:
2612 break;
2613 case Symbol::SEGMENT_END:
2ea97941 2614 value += os->memsz();
55a93433
ILT
2615 break;
2616 case Symbol::SEGMENT_BSS:
2ea97941 2617 value += os->filesz();
55a93433
ILT
2618 break;
2619 default:
2620 gold_unreachable();
2621 }
2622 }
2623 break;
ead1e424 2624
f3e9c5c5 2625 case Symbol::IS_CONSTANT:
2ea97941 2626 value = sym->value();
55a93433 2627 break;
ead1e424 2628
f3e9c5c5 2629 case Symbol::IS_UNDEFINED:
2ea97941 2630 value = 0;
f3e9c5c5
ILT
2631 break;
2632
55a93433
ILT
2633 default:
2634 gold_unreachable();
2635 }
ead1e424 2636
c0a62865 2637 *pstatus = CFVS_OK;
2ea97941 2638 return value;
c0a62865
DK
2639}
2640
2641// Finalize the symbol SYM. This returns true if the symbol should be
2642// added to the symbol table, false otherwise.
2643
2644template<int size>
2645bool
2646Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
2647{
2648 typedef typename Sized_symbol<size>::Value_type Value_type;
2649
2650 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
2651
2652 // The default version of a symbol may appear twice in the symbol
2653 // table. We only need to finalize it once.
2654 if (sym->has_symtab_index())
2655 return false;
2656
2657 if (!sym->in_reg())
2658 {
2659 gold_assert(!sym->has_symtab_index());
2660 sym->set_symtab_index(-1U);
2661 gold_assert(sym->dynsym_index() == -1U);
2662 return false;
2663 }
2664
badc8139
RÁE
2665 // If the symbol is only present on plugin files, the plugin decided we
2666 // don't need it.
2667 if (!sym->in_real_elf())
2668 {
2669 gold_assert(!sym->has_symtab_index());
2670 sym->set_symtab_index(-1U);
2671 return false;
2672 }
2673
c0a62865
DK
2674 // Compute final symbol value.
2675 Compute_final_value_status status;
2ea97941 2676 Value_type value = this->compute_final_value(sym, &status);
c0a62865
DK
2677
2678 switch (status)
2679 {
2680 case CFVS_OK:
2681 break;
2682 case CFVS_UNSUPPORTED_SYMBOL_SECTION:
2683 {
2684 bool is_ordinary;
2ea97941 2685 unsigned int shndx = sym->shndx(&is_ordinary);
c0a62865 2686 gold_error(_("%s: unsupported symbol section 0x%x"),
2ea97941 2687 sym->demangled_name().c_str(), shndx);
c0a62865
DK
2688 }
2689 break;
2690 case CFVS_NO_OUTPUT_SECTION:
2691 sym->set_symtab_index(-1U);
2692 return false;
2693 default:
2694 gold_unreachable();
2695 }
2696
2ea97941 2697 sym->set_value(value);
9e2dcb77 2698
8c604651
CS
2699 if (parameters->options().strip_all()
2700 || !parameters->options().should_retain_symbol(sym->name()))
55a93433
ILT
2701 {
2702 sym->set_symtab_index(-1U);
2703 return false;
54dc6425 2704 }
75f65a3e 2705
55a93433 2706 return true;
54dc6425
ILT
2707}
2708
61ba1cf9
ILT
2709// Write out the global symbols.
2710
2711void
fd9d194f 2712Symbol_table::write_globals(const Stringpool* sympool,
d491d34e
ILT
2713 const Stringpool* dynpool,
2714 Output_symtab_xindex* symtab_xindex,
2715 Output_symtab_xindex* dynsym_xindex,
2716 Output_file* of) const
61ba1cf9 2717{
8851ecca 2718 switch (parameters->size_and_endianness())
61ba1cf9 2719 {
9025d29d 2720#ifdef HAVE_TARGET_32_LITTLE
8851ecca 2721 case Parameters::TARGET_32_LITTLE:
fd9d194f 2722 this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex,
d491d34e 2723 dynsym_xindex, of);
8851ecca 2724 break;
9025d29d 2725#endif
8851ecca
ILT
2726#ifdef HAVE_TARGET_32_BIG
2727 case Parameters::TARGET_32_BIG:
fd9d194f 2728 this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex,
d491d34e 2729 dynsym_xindex, of);
8851ecca 2730 break;
9025d29d 2731#endif
9025d29d 2732#ifdef HAVE_TARGET_64_LITTLE
8851ecca 2733 case Parameters::TARGET_64_LITTLE:
fd9d194f 2734 this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex,
d491d34e 2735 dynsym_xindex, of);
8851ecca 2736 break;
9025d29d 2737#endif
8851ecca
ILT
2738#ifdef HAVE_TARGET_64_BIG
2739 case Parameters::TARGET_64_BIG:
fd9d194f 2740 this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex,
d491d34e 2741 dynsym_xindex, of);
8851ecca
ILT
2742 break;
2743#endif
2744 default:
2745 gold_unreachable();
61ba1cf9 2746 }
61ba1cf9
ILT
2747}
2748
2749// Write out the global symbols.
2750
2751template<int size, bool big_endian>
2752void
fd9d194f 2753Symbol_table::sized_write_globals(const Stringpool* sympool,
16649710 2754 const Stringpool* dynpool,
d491d34e
ILT
2755 Output_symtab_xindex* symtab_xindex,
2756 Output_symtab_xindex* dynsym_xindex,
61ba1cf9
ILT
2757 Output_file* of) const
2758{
8851ecca 2759 const Target& target = parameters->target();
9a2d6984 2760
61ba1cf9 2761 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
55a93433
ILT
2762
2763 const unsigned int output_count = this->output_count_;
2764 const section_size_type oview_size = output_count * sym_size;
2765 const unsigned int first_global_index = this->first_global_index_;
5fe2a0f5
ILT
2766 unsigned char* psyms;
2767 if (this->offset_ == 0 || output_count == 0)
2768 psyms = NULL;
2769 else
2770 psyms = of->get_output_view(this->offset_, oview_size);
16649710 2771
55a93433
ILT
2772 const unsigned int dynamic_count = this->dynamic_count_;
2773 const section_size_type dynamic_size = dynamic_count * sym_size;
2774 const unsigned int first_dynamic_global_index =
2775 this->first_dynamic_global_index_;
16649710 2776 unsigned char* dynamic_view;
5fe2a0f5 2777 if (this->dynamic_offset_ == 0 || dynamic_count == 0)
16649710
ILT
2778 dynamic_view = NULL;
2779 else
2780 dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
c06b7b0b 2781
61ba1cf9
ILT
2782 for (Symbol_table_type::const_iterator p = this->table_.begin();
2783 p != this->table_.end();
2784 ++p)
2785 {
2786 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
2787
9a2d6984 2788 // Possibly warn about unresolved symbols in shared libraries.
fd9d194f 2789 this->warn_about_undefined_dynobj_symbol(sym);
e2827e5f 2790
a3ad94ed 2791 unsigned int sym_index = sym->symtab_index();
16649710
ILT
2792 unsigned int dynsym_index;
2793 if (dynamic_view == NULL)
2794 dynsym_index = -1U;
2795 else
2796 dynsym_index = sym->dynsym_index();
2797
2798 if (sym_index == -1U && dynsym_index == -1U)
a3ad94ed
ILT
2799 {
2800 // This symbol is not included in the output file.
2801 continue;
2802 }
16649710 2803
2ea97941 2804 unsigned int shndx;
88dd47ac
ILT
2805 typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
2806 typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
ce279a62 2807 elfcpp::STB binding = sym->binding();
ead1e424
ILT
2808 switch (sym->source())
2809 {
2810 case Symbol::FROM_OBJECT:
2811 {
d491d34e
ILT
2812 bool is_ordinary;
2813 unsigned int in_shndx = sym->shndx(&is_ordinary);
ead1e424 2814
d491d34e 2815 if (!is_ordinary
0dfbdef4 2816 && in_shndx != elfcpp::SHN_ABS
8a5e3e08 2817 && !Symbol::is_common_shndx(in_shndx))
ead1e424 2818 {
75f2446e 2819 gold_error(_("%s: unsupported symbol section 0x%x"),
a2b1aa12 2820 sym->demangled_name().c_str(), in_shndx);
2ea97941 2821 shndx = in_shndx;
f6ce93d6 2822 }
ead1e424
ILT
2823 else
2824 {
75f2446e
ILT
2825 Object* symobj = sym->object();
2826 if (symobj->is_dynamic())
2827 {
2828 if (sym->needs_dynsym_value())
8851ecca 2829 dynsym_value = target.dynsym_value(sym);
2ea97941 2830 shndx = elfcpp::SHN_UNDEF;
ce279a62
CC
2831 if (sym->is_undef_binding_weak())
2832 binding = elfcpp::STB_WEAK;
74f67560
DK
2833 else
2834 binding = elfcpp::STB_GLOBAL;
75f2446e 2835 }
89fc3421 2836 else if (symobj->pluginobj() != NULL)
2ea97941 2837 shndx = elfcpp::SHN_UNDEF;
75f2446e 2838 else if (in_shndx == elfcpp::SHN_UNDEF
d491d34e
ILT
2839 || (!is_ordinary
2840 && (in_shndx == elfcpp::SHN_ABS
8a5e3e08 2841 || Symbol::is_common_shndx(in_shndx))))
2ea97941 2842 shndx = in_shndx;
75f2446e
ILT
2843 else
2844 {
2845 Relobj* relobj = static_cast<Relobj*>(symobj);
ef9beddf 2846 Output_section* os = relobj->output_section(in_shndx);
ef15dade
ST
2847 if (this->is_section_folded(relobj, in_shndx))
2848 {
2849 // This global symbol must be written out even though
2850 // it is folded.
2851 // Get the os of the section it is folded onto.
2852 Section_id folded =
2853 this->icf_->get_folded_section(relobj, in_shndx);
2854 gold_assert(folded.first !=NULL);
2855 Relobj* folded_obj =
2856 reinterpret_cast<Relobj*>(folded.first);
2857 os = folded_obj->output_section(folded.second);
2858 gold_assert(os != NULL);
2859 }
75f2446e 2860 gold_assert(os != NULL);
2ea97941 2861 shndx = os->out_shndx();
88dd47ac 2862
2ea97941 2863 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e
ILT
2864 {
2865 if (sym_index != -1U)
2ea97941 2866 symtab_xindex->add(sym_index, shndx);
d491d34e 2867 if (dynsym_index != -1U)
2ea97941
ILT
2868 dynsym_xindex->add(dynsym_index, shndx);
2869 shndx = elfcpp::SHN_XINDEX;
d491d34e
ILT
2870 }
2871
88dd47ac
ILT
2872 // In object files symbol values are section
2873 // relative.
8851ecca 2874 if (parameters->options().relocatable())
88dd47ac 2875 sym_value -= os->address();
75f2446e 2876 }
ead1e424
ILT
2877 }
2878 }
2879 break;
2880
2881 case Symbol::IN_OUTPUT_DATA:
2ea97941
ILT
2882 shndx = sym->output_data()->out_shndx();
2883 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e
ILT
2884 {
2885 if (sym_index != -1U)
2ea97941 2886 symtab_xindex->add(sym_index, shndx);
d491d34e 2887 if (dynsym_index != -1U)
2ea97941
ILT
2888 dynsym_xindex->add(dynsym_index, shndx);
2889 shndx = elfcpp::SHN_XINDEX;
d491d34e 2890 }
ead1e424
ILT
2891 break;
2892
2893 case Symbol::IN_OUTPUT_SEGMENT:
2ea97941 2894 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
2895 break;
2896
f3e9c5c5 2897 case Symbol::IS_CONSTANT:
2ea97941 2898 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
2899 break;
2900
f3e9c5c5 2901 case Symbol::IS_UNDEFINED:
2ea97941 2902 shndx = elfcpp::SHN_UNDEF;
f3e9c5c5
ILT
2903 break;
2904
ead1e424 2905 default:
a3ad94ed 2906 gold_unreachable();
ead1e424 2907 }
61ba1cf9 2908
16649710
ILT
2909 if (sym_index != -1U)
2910 {
55a93433
ILT
2911 sym_index -= first_global_index;
2912 gold_assert(sym_index < output_count);
2913 unsigned char* ps = psyms + (sym_index * sym_size);
2ea97941 2914 this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
ce279a62 2915 binding, sympool, ps);
16649710 2916 }
61ba1cf9 2917
16649710
ILT
2918 if (dynsym_index != -1U)
2919 {
2920 dynsym_index -= first_dynamic_global_index;
2921 gold_assert(dynsym_index < dynamic_count);
2922 unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
2ea97941 2923 this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
ce279a62 2924 binding, dynpool, pd);
16649710 2925 }
61ba1cf9
ILT
2926 }
2927
c06b7b0b 2928 of->write_output_view(this->offset_, oview_size, psyms);
16649710
ILT
2929 if (dynamic_view != NULL)
2930 of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
2931}
2932
2933// Write out the symbol SYM, in section SHNDX, to P. POOL is the
2934// strtab holding the name.
2935
2936template<int size, bool big_endian>
2937void
ab5c9e90
ILT
2938Symbol_table::sized_write_symbol(
2939 Sized_symbol<size>* sym,
2ea97941
ILT
2940 typename elfcpp::Elf_types<size>::Elf_Addr value,
2941 unsigned int shndx,
ce279a62 2942 elfcpp::STB binding,
ab5c9e90 2943 const Stringpool* pool,
7d1a9ebb 2944 unsigned char* p) const
16649710
ILT
2945{
2946 elfcpp::Sym_write<size, big_endian> osym(p);
6d1c4efb
ILT
2947 if (sym->version() == NULL || !parameters->options().relocatable())
2948 osym.put_st_name(pool->get_offset(sym->name()));
2949 else
2950 osym.put_st_name(pool->get_offset(sym->versioned_name()));
2ea97941 2951 osym.put_st_value(value);
58e54ac2 2952 // Use a symbol size of zero for undefined symbols from shared libraries.
2ea97941 2953 if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj())
58e54ac2
CD
2954 osym.put_st_size(0);
2955 else
2956 osym.put_st_size(sym->symsize());
53d7974c
L
2957 elfcpp::STT type = sym->type();
2958 // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
2959 if (type == elfcpp::STT_GNU_IFUNC
2960 && sym->is_from_dynobj())
2961 type = elfcpp::STT_FUNC;
55a93433
ILT
2962 // A version script may have overridden the default binding.
2963 if (sym->is_forced_local())
53d7974c 2964 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type));
55a93433 2965 else
ce279a62 2966 osym.put_st_info(elfcpp::elf_st_info(binding, type));
16649710 2967 osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
2ea97941 2968 osym.put_st_shndx(shndx);
61ba1cf9
ILT
2969}
2970
9a2d6984
ILT
2971// Check for unresolved symbols in shared libraries. This is
2972// controlled by the --allow-shlib-undefined option.
2973
2974// We only warn about libraries for which we have seen all the
2975// DT_NEEDED entries. We don't try to track down DT_NEEDED entries
2976// which were not seen in this link. If we didn't see a DT_NEEDED
2977// entry, we aren't going to be able to reliably report whether the
2978// symbol is undefined.
2979
fd9d194f
ILT
2980// We also don't warn about libraries found in a system library
2981// directory (e.g., /lib or /usr/lib); we assume that those libraries
2982// are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
2983// can have undefined references satisfied by ld-linux.so.
9a2d6984
ILT
2984
2985inline void
fd9d194f 2986Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const
9a2d6984 2987{
d491d34e 2988 bool dummy;
9a2d6984
ILT
2989 if (sym->source() == Symbol::FROM_OBJECT
2990 && sym->object()->is_dynamic()
d491d34e 2991 && sym->shndx(&dummy) == elfcpp::SHN_UNDEF
9a2d6984 2992 && sym->binding() != elfcpp::STB_WEAK
8851ecca
ILT
2993 && !parameters->options().allow_shlib_undefined()
2994 && !parameters->target().is_defined_by_abi(sym)
fd9d194f 2995 && !sym->object()->is_in_system_directory())
9a2d6984
ILT
2996 {
2997 // A very ugly cast.
2998 Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
2999 if (!dynobj->has_unknown_needed_entries())
f073bbf7 3000 gold_undefined_symbol(sym);
9a2d6984
ILT
3001 }
3002}
3003
a3ad94ed
ILT
3004// Write out a section symbol. Return the update offset.
3005
3006void
ca09d69a 3007Symbol_table::write_section_symbol(const Output_section* os,
d491d34e 3008 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3009 Output_file* of,
3010 off_t offset) const
3011{
8851ecca 3012 switch (parameters->size_and_endianness())
a3ad94ed 3013 {
9025d29d 3014#ifdef HAVE_TARGET_32_LITTLE
8851ecca 3015 case Parameters::TARGET_32_LITTLE:
d491d34e
ILT
3016 this->sized_write_section_symbol<32, false>(os, symtab_xindex, of,
3017 offset);
8851ecca 3018 break;
9025d29d 3019#endif
8851ecca
ILT
3020#ifdef HAVE_TARGET_32_BIG
3021 case Parameters::TARGET_32_BIG:
d491d34e
ILT
3022 this->sized_write_section_symbol<32, true>(os, symtab_xindex, of,
3023 offset);
8851ecca 3024 break;
9025d29d 3025#endif
9025d29d 3026#ifdef HAVE_TARGET_64_LITTLE
8851ecca 3027 case Parameters::TARGET_64_LITTLE:
d491d34e
ILT
3028 this->sized_write_section_symbol<64, false>(os, symtab_xindex, of,
3029 offset);
8851ecca 3030 break;
9025d29d 3031#endif
8851ecca
ILT
3032#ifdef HAVE_TARGET_64_BIG
3033 case Parameters::TARGET_64_BIG:
d491d34e
ILT
3034 this->sized_write_section_symbol<64, true>(os, symtab_xindex, of,
3035 offset);
8851ecca
ILT
3036 break;
3037#endif
3038 default:
3039 gold_unreachable();
a3ad94ed 3040 }
a3ad94ed
ILT
3041}
3042
3043// Write out a section symbol, specialized for size and endianness.
3044
3045template<int size, bool big_endian>
3046void
3047Symbol_table::sized_write_section_symbol(const Output_section* os,
d491d34e 3048 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3049 Output_file* of,
3050 off_t offset) const
3051{
3052 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
3053
3054 unsigned char* pov = of->get_output_view(offset, sym_size);
3055
3056 elfcpp::Sym_write<size, big_endian> osym(pov);
3057 osym.put_st_name(0);
b4ecf66b
ILT
3058 if (parameters->options().relocatable())
3059 osym.put_st_value(0);
3060 else
3061 osym.put_st_value(os->address());
a3ad94ed
ILT
3062 osym.put_st_size(0);
3063 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
3064 elfcpp::STT_SECTION));
3065 osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
d491d34e 3066
2ea97941
ILT
3067 unsigned int shndx = os->out_shndx();
3068 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e 3069 {
2ea97941
ILT
3070 symtab_xindex->add(os->symtab_index(), shndx);
3071 shndx = elfcpp::SHN_XINDEX;
d491d34e 3072 }
2ea97941 3073 osym.put_st_shndx(shndx);
a3ad94ed
ILT
3074
3075 of->write_output_view(offset, sym_size, pov);
3076}
3077
abaa3995
ILT
3078// Print statistical information to stderr. This is used for --stats.
3079
3080void
3081Symbol_table::print_stats() const
3082{
3083#if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
3084 fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"),
3085 program_name, this->table_.size(), this->table_.bucket_count());
3086#else
3087 fprintf(stderr, _("%s: symbol table entries: %zu\n"),
3088 program_name, this->table_.size());
3089#endif
ad8f37d1 3090 this->namepool_.print_stats("symbol table stringpool");
abaa3995
ILT
3091}
3092
ff541f30
ILT
3093// We check for ODR violations by looking for symbols with the same
3094// name for which the debugging information reports that they were
71ff8986 3095// defined in disjoint source locations. When comparing the source
55382fb7
ILT
3096// location, we consider instances with the same base filename to be
3097// the same. This is because different object files/shared libraries
3098// can include the same header file using different paths, and
3099// different optimization settings can make the line number appear to
3100// be a couple lines off, and we don't want to report an ODR violation
3101// in those cases.
ff541f30
ILT
3102
3103// This struct is used to compare line information, as returned by
7bf1f802 3104// Dwarf_line_info::one_addr2line. It implements a < comparison
71ff8986 3105// operator used with std::sort.
ff541f30
ILT
3106
3107struct Odr_violation_compare
3108{
3109 bool
3110 operator()(const std::string& s1, const std::string& s2) const
3111 {
55382fb7 3112 // Inputs should be of the form "dirname/filename:linenum" where
71ff8986 3113 // "dirname/" is optional. We want to compare just the filename:linenum.
55382fb7 3114
71ff8986 3115 // Find the last '/' in each string.
55382fb7
ILT
3116 std::string::size_type s1begin = s1.rfind('/');
3117 std::string::size_type s2begin = s2.rfind('/');
55382fb7
ILT
3118 // If there was no '/' in a string, start at the beginning.
3119 if (s1begin == std::string::npos)
3120 s1begin = 0;
3121 if (s2begin == std::string::npos)
3122 s2begin = 0;
71ff8986
ILT
3123 return s1.compare(s1begin, std::string::npos,
3124 s2, s2begin, std::string::npos) < 0;
ff541f30
ILT
3125 }
3126};
3127
71ff8986
ILT
3128// Returns all of the lines attached to LOC, not just the one the
3129// instruction actually came from.
3130std::vector<std::string>
3131Symbol_table::linenos_from_loc(const Task* task,
3132 const Symbol_location& loc)
3133{
3134 // We need to lock the object in order to read it. This
3135 // means that we have to run in a singleton Task. If we
3136 // want to run this in a general Task for better
3137 // performance, we will need one Task for object, plus
3138 // appropriate locking to ensure that we don't conflict with
3139 // other uses of the object. Also note, one_addr2line is not
3140 // currently thread-safe.
3141 Task_lock_obj<Object> tl(task, loc.object);
3142
3143 std::vector<std::string> result;
3144 // 16 is the size of the object-cache that one_addr2line should use.
3145 std::string canonical_result = Dwarf_line_info::one_addr2line(
3146 loc.object, loc.shndx, loc.offset, 16, &result);
3147 if (!canonical_result.empty())
3148 result.push_back(canonical_result);
3149 return result;
3150}
3151
3152// OutputIterator that records if it was ever assigned to. This
3153// allows it to be used with std::set_intersection() to check for
3154// intersection rather than computing the intersection.
3155struct Check_intersection
3156{
3157 Check_intersection()
3158 : value_(false)
3159 {}
3160
3161 bool had_intersection() const
3162 { return this->value_; }
3163
3164 Check_intersection& operator++()
3165 { return *this; }
3166
3167 Check_intersection& operator*()
3168 { return *this; }
3169
3170 template<typename T>
3171 Check_intersection& operator=(const T&)
3172 {
3173 this->value_ = true;
3174 return *this;
3175 }
3176
3177 private:
3178 bool value_;
3179};
3180
70e654ba 3181// Check candidate_odr_violations_ to find symbols with the same name
71ff8986
ILT
3182// but apparently different definitions (different source-file/line-no
3183// for each line assigned to the first instruction).
70e654ba
ILT
3184
3185void
17a1d0a9
ILT
3186Symbol_table::detect_odr_violations(const Task* task,
3187 const char* output_file_name) const
70e654ba
ILT
3188{
3189 for (Odr_map::const_iterator it = candidate_odr_violations_.begin();
3190 it != candidate_odr_violations_.end();
3191 ++it)
3192 {
71ff8986
ILT
3193 const char* const symbol_name = it->first;
3194
3195 std::string first_object_name;
3196 std::vector<std::string> first_object_linenos;
3197
3198 Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3199 locs = it->second.begin();
3200 const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3201 locs_end = it->second.end();
3202 for (; locs != locs_end && first_object_linenos.empty(); ++locs)
70e654ba 3203 {
71ff8986
ILT
3204 // Save the line numbers from the first definition to
3205 // compare to the other definitions. Ideally, we'd compare
3206 // every definition to every other, but we don't want to
3207 // take O(N^2) time to do this. This shortcut may cause
3208 // false negatives that appear or disappear depending on the
3209 // link order, but it won't cause false positives.
3210 first_object_name = locs->object->name();
3211 first_object_linenos = this->linenos_from_loc(task, *locs);
70e654ba
ILT
3212 }
3213
71ff8986
ILT
3214 // Sort by Odr_violation_compare to make std::set_intersection work.
3215 std::sort(first_object_linenos.begin(), first_object_linenos.end(),
3216 Odr_violation_compare());
3217
3218 for (; locs != locs_end; ++locs)
70e654ba 3219 {
71ff8986
ILT
3220 std::vector<std::string> linenos =
3221 this->linenos_from_loc(task, *locs);
3222 // linenos will be empty if we couldn't parse the debug info.
3223 if (linenos.empty())
3224 continue;
3225 // Sort by Odr_violation_compare to make std::set_intersection work.
3226 std::sort(linenos.begin(), linenos.end(), Odr_violation_compare());
3227
3228 Check_intersection intersection_result =
3229 std::set_intersection(first_object_linenos.begin(),
3230 first_object_linenos.end(),
3231 linenos.begin(),
3232 linenos.end(),
3233 Check_intersection(),
3234 Odr_violation_compare());
3235 if (!intersection_result.had_intersection())
3236 {
3237 gold_warning(_("while linking %s: symbol '%s' defined in "
3238 "multiple places (possible ODR violation):"),
3239 output_file_name, demangle(symbol_name).c_str());
3240 // This only prints one location from each definition,
3241 // which may not be the location we expect to intersect
3242 // with another definition. We could print the whole
3243 // set of locations, but that seems too verbose.
3244 gold_assert(!first_object_linenos.empty());
3245 gold_assert(!linenos.empty());
3246 fprintf(stderr, _(" %s from %s\n"),
3247 first_object_linenos[0].c_str(),
3248 first_object_name.c_str());
3249 fprintf(stderr, _(" %s from %s\n"),
3250 linenos[0].c_str(),
3251 locs->object->name().c_str());
3252 // Only print one broken pair, to avoid needing to
3253 // compare against a list of the disjoint definition
3254 // locations we've found so far. (If we kept comparing
3255 // against just the first one, we'd get a lot of
3256 // redundant complaints about the second definition
3257 // location.)
3258 break;
3259 }
70e654ba
ILT
3260 }
3261 }
e4e5049b
CS
3262 // We only call one_addr2line() in this function, so we can clear its cache.
3263 Dwarf_line_info::clear_addr2line_cache();
70e654ba
ILT
3264}
3265
f6ce93d6
ILT
3266// Warnings functions.
3267
3268// Add a new warning.
3269
3270void
2ea97941 3271Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
cb295612 3272 const std::string& warning)
f6ce93d6 3273{
2ea97941
ILT
3274 name = symtab->canonicalize_name(name);
3275 this->warnings_[name].set(obj, warning);
f6ce93d6
ILT
3276}
3277
3278// Look through the warnings and mark the symbols for which we should
3279// warn. This is called during Layout::finalize when we know the
3280// sources for all the symbols.
3281
3282void
cb295612 3283Warnings::note_warnings(Symbol_table* symtab)
f6ce93d6
ILT
3284{
3285 for (Warning_table::iterator p = this->warnings_.begin();
3286 p != this->warnings_.end();
3287 ++p)
3288 {
3289 Symbol* sym = symtab->lookup(p->first, NULL);
3290 if (sym != NULL
3291 && sym->source() == Symbol::FROM_OBJECT
3292 && sym->object() == p->second.object)
cb295612 3293 sym->set_has_warning();
f6ce93d6
ILT
3294 }
3295}
3296
3297// Issue a warning. This is called when we see a relocation against a
3298// symbol for which has a warning.
3299
75f2446e 3300template<int size, bool big_endian>
f6ce93d6 3301void
75f2446e
ILT
3302Warnings::issue_warning(const Symbol* sym,
3303 const Relocate_info<size, big_endian>* relinfo,
3304 size_t relnum, off_t reloffset) const
f6ce93d6 3305{
a3ad94ed 3306 gold_assert(sym->has_warning());
9d3b0698
ILT
3307
3308 // We don't want to issue a warning for a relocation against the
3309 // symbol in the same object file in which the symbol is defined.
3310 if (sym->object() == relinfo->object)
3311 return;
3312
f6ce93d6 3313 Warning_table::const_iterator p = this->warnings_.find(sym->name());
a3ad94ed 3314 gold_assert(p != this->warnings_.end());
75f2446e
ILT
3315 gold_warning_at_location(relinfo, relnum, reloffset,
3316 "%s", p->second.text.c_str());
f6ce93d6
ILT
3317}
3318
14bfc3f5
ILT
3319// Instantiate the templates we need. We could use the configure
3320// script to restrict this to only the ones needed for implemented
3321// targets.
3322
c7912668
ILT
3323#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3324template
3325void
3326Sized_symbol<32>::allocate_common(Output_data*, Value_type);
3327#endif
3328
3329#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3330template
3331void
3332Sized_symbol<64>::allocate_common(Output_data*, Value_type);
3333#endif
3334
193a53d9 3335#ifdef HAVE_TARGET_32_LITTLE
14bfc3f5
ILT
3336template
3337void
193a53d9 3338Symbol_table::add_from_relobj<32, false>(
6fa2a40b 3339 Sized_relobj_file<32, false>* relobj,
f6ce93d6 3340 const unsigned char* syms,
14bfc3f5 3341 size_t count,
d491d34e 3342 size_t symndx_offset,
14bfc3f5
ILT
3343 const char* sym_names,
3344 size_t sym_name_size,
6fa2a40b 3345 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3346 size_t* defined);
193a53d9 3347#endif
14bfc3f5 3348
193a53d9 3349#ifdef HAVE_TARGET_32_BIG
14bfc3f5
ILT
3350template
3351void
193a53d9 3352Symbol_table::add_from_relobj<32, true>(
6fa2a40b 3353 Sized_relobj_file<32, true>* relobj,
f6ce93d6 3354 const unsigned char* syms,
14bfc3f5 3355 size_t count,
d491d34e 3356 size_t symndx_offset,
14bfc3f5
ILT
3357 const char* sym_names,
3358 size_t sym_name_size,
6fa2a40b 3359 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3360 size_t* defined);
193a53d9 3361#endif
14bfc3f5 3362
193a53d9 3363#ifdef HAVE_TARGET_64_LITTLE
14bfc3f5
ILT
3364template
3365void
193a53d9 3366Symbol_table::add_from_relobj<64, false>(
6fa2a40b 3367 Sized_relobj_file<64, false>* relobj,
f6ce93d6 3368 const unsigned char* syms,
14bfc3f5 3369 size_t count,
d491d34e 3370 size_t symndx_offset,
14bfc3f5
ILT
3371 const char* sym_names,
3372 size_t sym_name_size,
6fa2a40b 3373 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3374 size_t* defined);
193a53d9 3375#endif
14bfc3f5 3376
193a53d9 3377#ifdef HAVE_TARGET_64_BIG
14bfc3f5
ILT
3378template
3379void
193a53d9 3380Symbol_table::add_from_relobj<64, true>(
6fa2a40b 3381 Sized_relobj_file<64, true>* relobj,
f6ce93d6 3382 const unsigned char* syms,
14bfc3f5 3383 size_t count,
d491d34e 3384 size_t symndx_offset,
14bfc3f5
ILT
3385 const char* sym_names,
3386 size_t sym_name_size,
6fa2a40b 3387 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3388 size_t* defined);
193a53d9 3389#endif
14bfc3f5 3390
89fc3421
CC
3391#ifdef HAVE_TARGET_32_LITTLE
3392template
3393Symbol*
3394Symbol_table::add_from_pluginobj<32, false>(
3395 Sized_pluginobj<32, false>* obj,
3396 const char* name,
3397 const char* ver,
3398 elfcpp::Sym<32, false>* sym);
3399#endif
3400
3401#ifdef HAVE_TARGET_32_BIG
3402template
3403Symbol*
3404Symbol_table::add_from_pluginobj<32, true>(
3405 Sized_pluginobj<32, true>* obj,
3406 const char* name,
3407 const char* ver,
3408 elfcpp::Sym<32, true>* sym);
3409#endif
3410
3411#ifdef HAVE_TARGET_64_LITTLE
3412template
3413Symbol*
3414Symbol_table::add_from_pluginobj<64, false>(
3415 Sized_pluginobj<64, false>* obj,
3416 const char* name,
3417 const char* ver,
3418 elfcpp::Sym<64, false>* sym);
3419#endif
3420
3421#ifdef HAVE_TARGET_64_BIG
3422template
3423Symbol*
3424Symbol_table::add_from_pluginobj<64, true>(
3425 Sized_pluginobj<64, true>* obj,
3426 const char* name,
3427 const char* ver,
3428 elfcpp::Sym<64, true>* sym);
3429#endif
3430
193a53d9 3431#ifdef HAVE_TARGET_32_LITTLE
dbe717ef
ILT
3432template
3433void
193a53d9
ILT
3434Symbol_table::add_from_dynobj<32, false>(
3435 Sized_dynobj<32, false>* dynobj,
dbe717ef
ILT
3436 const unsigned char* syms,
3437 size_t count,
3438 const char* sym_names,
3439 size_t sym_name_size,
3440 const unsigned char* versym,
3441 size_t versym_size,
92de84a6 3442 const std::vector<const char*>* version_map,
6fa2a40b 3443 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3444 size_t* defined);
193a53d9 3445#endif
dbe717ef 3446
193a53d9 3447#ifdef HAVE_TARGET_32_BIG
dbe717ef
ILT
3448template
3449void
193a53d9
ILT
3450Symbol_table::add_from_dynobj<32, true>(
3451 Sized_dynobj<32, true>* dynobj,
dbe717ef
ILT
3452 const unsigned char* syms,
3453 size_t count,
3454 const char* sym_names,
3455 size_t sym_name_size,
3456 const unsigned char* versym,
3457 size_t versym_size,
92de84a6 3458 const std::vector<const char*>* version_map,
6fa2a40b 3459 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3460 size_t* defined);
193a53d9 3461#endif
dbe717ef 3462
193a53d9 3463#ifdef HAVE_TARGET_64_LITTLE
dbe717ef
ILT
3464template
3465void
193a53d9
ILT
3466Symbol_table::add_from_dynobj<64, false>(
3467 Sized_dynobj<64, false>* dynobj,
dbe717ef
ILT
3468 const unsigned char* syms,
3469 size_t count,
3470 const char* sym_names,
3471 size_t sym_name_size,
3472 const unsigned char* versym,
3473 size_t versym_size,
92de84a6 3474 const std::vector<const char*>* version_map,
6fa2a40b 3475 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3476 size_t* defined);
193a53d9 3477#endif
dbe717ef 3478
193a53d9 3479#ifdef HAVE_TARGET_64_BIG
dbe717ef
ILT
3480template
3481void
193a53d9
ILT
3482Symbol_table::add_from_dynobj<64, true>(
3483 Sized_dynobj<64, true>* dynobj,
dbe717ef
ILT
3484 const unsigned char* syms,
3485 size_t count,
3486 const char* sym_names,
3487 size_t sym_name_size,
3488 const unsigned char* versym,
3489 size_t versym_size,
92de84a6 3490 const std::vector<const char*>* version_map,
6fa2a40b 3491 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3492 size_t* defined);
193a53d9 3493#endif
dbe717ef 3494
cdc29364
CC
3495#ifdef HAVE_TARGET_32_LITTLE
3496template
26d3c67d 3497Sized_symbol<32>*
cdc29364
CC
3498Symbol_table::add_from_incrobj(
3499 Object* obj,
3500 const char* name,
3501 const char* ver,
3502 elfcpp::Sym<32, false>* sym);
3503#endif
3504
3505#ifdef HAVE_TARGET_32_BIG
3506template
26d3c67d 3507Sized_symbol<32>*
cdc29364
CC
3508Symbol_table::add_from_incrobj(
3509 Object* obj,
3510 const char* name,
3511 const char* ver,
3512 elfcpp::Sym<32, true>* sym);
3513#endif
3514
3515#ifdef HAVE_TARGET_64_LITTLE
3516template
26d3c67d 3517Sized_symbol<64>*
cdc29364
CC
3518Symbol_table::add_from_incrobj(
3519 Object* obj,
3520 const char* name,
3521 const char* ver,
3522 elfcpp::Sym<64, false>* sym);
3523#endif
3524
3525#ifdef HAVE_TARGET_64_BIG
3526template
26d3c67d 3527Sized_symbol<64>*
cdc29364
CC
3528Symbol_table::add_from_incrobj(
3529 Object* obj,
3530 const char* name,
3531 const char* ver,
3532 elfcpp::Sym<64, true>* sym);
3533#endif
3534
46fe1623
ILT
3535#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3536template
3537void
fe8718a4 3538Symbol_table::define_with_copy_reloc<32>(
fe8718a4
ILT
3539 Sized_symbol<32>* sym,
3540 Output_data* posd,
2ea97941 3541 elfcpp::Elf_types<32>::Elf_Addr value);
46fe1623
ILT
3542#endif
3543
3544#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3545template
3546void
fe8718a4 3547Symbol_table::define_with_copy_reloc<64>(
fe8718a4
ILT
3548 Sized_symbol<64>* sym,
3549 Output_data* posd,
2ea97941 3550 elfcpp::Elf_types<64>::Elf_Addr value);
46fe1623
ILT
3551#endif
3552
75f2446e
ILT
3553#ifdef HAVE_TARGET_32_LITTLE
3554template
3555void
3556Warnings::issue_warning<32, false>(const Symbol* sym,
3557 const Relocate_info<32, false>* relinfo,
3558 size_t relnum, off_t reloffset) const;
3559#endif
3560
3561#ifdef HAVE_TARGET_32_BIG
3562template
3563void
3564Warnings::issue_warning<32, true>(const Symbol* sym,
3565 const Relocate_info<32, true>* relinfo,
3566 size_t relnum, off_t reloffset) const;
3567#endif
3568
3569#ifdef HAVE_TARGET_64_LITTLE
3570template
3571void
3572Warnings::issue_warning<64, false>(const Symbol* sym,
3573 const Relocate_info<64, false>* relinfo,
3574 size_t relnum, off_t reloffset) const;
3575#endif
3576
3577#ifdef HAVE_TARGET_64_BIG
3578template
3579void
3580Warnings::issue_warning<64, true>(const Symbol* sym,
3581 const Relocate_info<64, true>* relinfo,
3582 size_t relnum, off_t reloffset) const;
3583#endif
3584
14bfc3f5 3585} // End namespace gold.