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1// symtab.cc -- the gold symbol table
2
b90efa5b 3// Copyright (C) 2006-2015 Free Software Foundation, Inc.
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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
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23#include "gold.h"
24
04bf7072 25#include <cstring>
14bfc3f5 26#include <stdint.h>
04bf7072 27#include <algorithm>
70e654ba 28#include <set>
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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"
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44
45namespace gold
46{
47
48// Class Symbol.
49
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50// Initialize fields in Symbol. This initializes everything except u_
51// and source_.
14bfc3f5 52
14bfc3f5 53void
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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{
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58 this->name_ = name;
59 this->version_ = version;
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60 this->symtab_index_ = 0;
61 this->dynsym_index_ = 0;
0a65a3a7 62 this->got_offsets_.init();
880cd20d 63 this->plt_offset_ = -1U;
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64 this->type_ = type;
65 this->binding_ = binding;
66 this->visibility_ = visibility;
67 this->nonvis_ = nonvis;
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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;
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80 this->undef_binding_set_ = false;
81 this->undef_binding_weak_ = false;
5146f448 82 this->is_predefined_ = false;
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83}
84
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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
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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;
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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
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109}
110
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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,
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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;
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122 this->u_.from_object.shndx = st_shndx;
123 this->is_ordinary_shndx_ = is_ordinary;
ead1e424 124 this->source_ = FROM_OBJECT;
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125 this->in_reg_ = !object->is_dynamic();
126 this->in_dyn_ = object->is_dynamic();
127 this->in_real_elf_ = object->pluginobj() == NULL;
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128}
129
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130// Initialize the fields in the base class Symbol for a symbol defined
131// in an Output_data.
132
133void
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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,
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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;
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147}
148
149// Initialize the fields in the base class Symbol for a symbol defined
150// in an Output_segment.
151
152void
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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,
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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;
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167}
168
169// Initialize the fields in the base class Symbol for a symbol defined
170// as a constant.
171
172void
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173Symbol::init_base_constant(const char* name, const char* version,
174 elfcpp::STT type, elfcpp::STB binding,
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175 elfcpp::STV visibility, unsigned char nonvis,
176 bool is_predefined)
f3e9c5c5 177{
2ea97941 178 this->init_fields(name, version, type, binding, visibility, nonvis);
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179 this->source_ = IS_CONSTANT;
180 this->in_reg_ = true;
89fc3421 181 this->in_real_elf_ = true;
5146f448 182 this->is_predefined_ = is_predefined;
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183}
184
185// Initialize the fields in the base class Symbol for an undefined
186// symbol.
187
188void
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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;
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198}
199
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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.
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212
213template<int size>
214template<bool big_endian>
215void
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216Sized_symbol<size>::init_object(const char* name, const char* version,
217 Object* object,
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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();
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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
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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,
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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);
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242 this->value_ = value;
243 this->symsize_ = symsize;
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244}
245
246// Initialize the fields in Sized_symbol for a symbol defined in an
247// Output_segment.
248
249template<int size>
250void
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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,
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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);
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262 this->value_ = value;
263 this->symsize_ = symsize;
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264}
265
266// Initialize the fields in Sized_symbol for a symbol defined as a
267// constant.
268
269template<int size>
270void
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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,
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CC
274 elfcpp::STV visibility, unsigned char nonvis,
275 bool is_predefined)
ead1e424 276{
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277 this->init_base_constant(name, version, type, binding, visibility, nonvis,
278 is_predefined);
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279 this->value_ = value;
280 this->symsize_ = symsize;
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281}
282
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283// Initialize the fields in Sized_symbol for an undefined symbol.
284
285template<int size>
286void
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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);
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292 this->value_ = 0;
293 this->symsize_ = 0;
294}
295
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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
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311// Return true if SHNDX represents a common symbol.
312
313bool
2ea97941 314Symbol::is_common_shndx(unsigned int shndx)
8a5e3e08 315{
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316 return (shndx == elfcpp::SHN_COMMON
317 || shndx == parameters->target().small_common_shndx()
318 || shndx == parameters->target().large_common_shndx());
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319}
320
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321// Allocate a common symbol.
322
323template<int size>
324void
2ea97941 325Sized_symbol<size>::allocate_common(Output_data* od, Value_type value)
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326{
327 this->allocate_base_common(od);
2ea97941 328 this->value_ = value;
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329}
330
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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
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334// Return true if this symbol should be added to the dynamic symbol
335// table.
336
7b549045 337bool
ce97fa81 338Symbol::should_add_dynsym_entry(Symbol_table* symtab) const
436ca963 339{
badc8139
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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
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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
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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;
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359 unsigned int shndx = this->shndx(&is_ordinary);
360 if (is_ordinary && shndx != elfcpp::SHN_UNDEF
ce97fa81
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361 && !relobj->is_section_included(shndx)
362 && !symtab->is_section_folded(relobj, shndx))
6d03d481
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363 return false;
364 }
365
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366 // If the symbol was forced dynamic in a --dynamic-list file
367 // or an --export-dynamic-symbol option, add it.
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368 if (!this->is_from_dynobj()
369 && (parameters->options().in_dynamic_list(this->name())
370 || parameters->options().is_export_dynamic_symbol(this->name())))
31821be0
CC
371 {
372 if (!this->is_forced_local())
373 return true;
374 gold_warning(_("Cannot export local symbol '%s'"),
375 this->demangled_name().c_str());
376 return false;
377 }
378
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379 // If the symbol was forced local in a version script, do not add it.
380 if (this->is_forced_local())
381 return false;
382
c82fbeee
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383 // If dynamic-list-data was specified, add any STT_OBJECT.
384 if (parameters->options().dynamic_list_data()
385 && !this->is_from_dynobj()
386 && this->type() == elfcpp::STT_OBJECT)
387 return true;
388
389 // If --dynamic-list-cpp-new was specified, add any new/delete symbol.
390 // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols.
391 if ((parameters->options().dynamic_list_cpp_new()
392 || parameters->options().dynamic_list_cpp_typeinfo())
393 && !this->is_from_dynobj())
394 {
395 // TODO(csilvers): We could probably figure out if we're an operator
396 // new/delete or typeinfo without the need to demangle.
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397 char* demangled_name = cplus_demangle(this->name(),
398 DMGL_ANSI | DMGL_PARAMS);
399 if (demangled_name == NULL)
c82fbeee
CS
400 {
401 // Not a C++ symbol, so it can't satisfy these flags
402 }
403 else if (parameters->options().dynamic_list_cpp_new()
2ea97941
ILT
404 && (strprefix(demangled_name, "operator new")
405 || strprefix(demangled_name, "operator delete")))
c82fbeee 406 {
2ea97941 407 free(demangled_name);
c82fbeee
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408 return true;
409 }
410 else if (parameters->options().dynamic_list_cpp_typeinfo()
2ea97941
ILT
411 && (strprefix(demangled_name, "typeinfo name for")
412 || strprefix(demangled_name, "typeinfo for")))
c82fbeee 413 {
2ea97941 414 free(demangled_name);
c82fbeee
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415 return true;
416 }
417 else
2ea97941 418 free(demangled_name);
c82fbeee
CS
419 }
420
436ca963
ILT
421 // If exporting all symbols or building a shared library,
422 // and the symbol is defined in a regular object and is
423 // externally visible, we need to add it.
8851ecca 424 if ((parameters->options().export_dynamic() || parameters->options().shared())
436ca963 425 && !this->is_from_dynobj()
f3ae1b28 426 && !this->is_undefined()
436ca963
ILT
427 && this->is_externally_visible())
428 return true;
429
430 return false;
431}
432
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433// Return true if the final value of this symbol is known at link
434// time.
435
436bool
437Symbol::final_value_is_known() const
438{
439 // If we are not generating an executable, then no final values are
a6a17750
CC
440 // known, since they will change at runtime, with the exception of
441 // TLS symbols in a position-independent executable.
442 if ((parameters->options().output_is_position_independent()
443 || parameters->options().relocatable())
444 && !(this->type() == elfcpp::STT_TLS
445 && parameters->options().pie()))
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446 return false;
447
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448 // If the symbol is not from an object file, and is not undefined,
449 // then it is defined, and known.
b3b74ddc 450 if (this->source_ != FROM_OBJECT)
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451 {
452 if (this->source_ != IS_UNDEFINED)
453 return true;
454 }
455 else
456 {
457 // If the symbol is from a dynamic object, then the final value
458 // is not known.
459 if (this->object()->is_dynamic())
460 return false;
b3b74ddc 461
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462 // If the symbol is not undefined (it is defined or common),
463 // then the final value is known.
464 if (!this->is_undefined())
465 return true;
466 }
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467
468 // If the symbol is undefined, then whether the final value is known
469 // depends on whether we are doing a static link. If we are doing a
470 // dynamic link, then the final value could be filled in at runtime.
471 // This could reasonably be the case for a weak undefined symbol.
472 return parameters->doing_static_link();
473}
474
77e65537 475// Return the output section where this symbol is defined.
a445fddf 476
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477Output_section*
478Symbol::output_section() const
a445fddf
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479{
480 switch (this->source_)
481 {
482 case FROM_OBJECT:
77e65537 483 {
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484 unsigned int shndx = this->u_.from_object.shndx;
485 if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_)
77e65537
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486 {
487 gold_assert(!this->u_.from_object.object->is_dynamic());
89fc3421 488 gold_assert(this->u_.from_object.object->pluginobj() == NULL);
77e65537 489 Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object);
2ea97941 490 return relobj->output_section(shndx);
77e65537
ILT
491 }
492 return NULL;
493 }
494
a445fddf 495 case IN_OUTPUT_DATA:
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496 return this->u_.in_output_data.output_data->output_section();
497
a445fddf 498 case IN_OUTPUT_SEGMENT:
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499 case IS_CONSTANT:
500 case IS_UNDEFINED:
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501 return NULL;
502
503 default:
504 gold_unreachable();
505 }
506}
507
508// Set the symbol's output section. This is used for symbols defined
509// in scripts. This should only be called after the symbol table has
510// been finalized.
511
512void
513Symbol::set_output_section(Output_section* os)
514{
515 switch (this->source_)
516 {
517 case FROM_OBJECT:
518 case IN_OUTPUT_DATA:
519 gold_assert(this->output_section() == os);
520 break;
f3e9c5c5 521 case IS_CONSTANT:
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522 this->source_ = IN_OUTPUT_DATA;
523 this->u_.in_output_data.output_data = os;
524 this->u_.in_output_data.offset_is_from_end = false;
525 break;
526 case IN_OUTPUT_SEGMENT:
f3e9c5c5 527 case IS_UNDEFINED:
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528 default:
529 gold_unreachable();
530 }
531}
532
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533// Set the symbol's output segment. This is used for pre-defined
534// symbols whose segments aren't known until after layout is done
535// (e.g., __ehdr_start).
536
537void
538Symbol::set_output_segment(Output_segment* os, Segment_offset_base base)
539{
540 gold_assert(this->is_predefined_);
541 this->source_ = IN_OUTPUT_SEGMENT;
542 this->u_.in_output_segment.output_segment = os;
543 this->u_.in_output_segment.offset_base = base;
544}
545
546// Set the symbol to undefined. This is used for pre-defined
547// symbols whose segments aren't known until after layout is done
548// (e.g., __ehdr_start).
549
550void
551Symbol::set_undefined()
552{
d1bddd3c
CC
553 this->source_ = IS_UNDEFINED;
554 this->is_predefined_ = false;
555}
556
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557// Class Symbol_table.
558
09124467 559Symbol_table::Symbol_table(unsigned int count,
2ea97941 560 const Version_script_info& version_script)
6d013333 561 : saw_undefined_(0), offset_(0), table_(count), namepool_(),
8a5e3e08
ILT
562 forwarders_(), commons_(), tls_commons_(), small_commons_(),
563 large_commons_(), forced_locals_(), warnings_(),
2ea97941 564 version_script_(version_script), gc_(NULL), icf_(NULL)
14bfc3f5 565{
6d013333 566 namepool_.reserve(count);
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ILT
567}
568
569Symbol_table::~Symbol_table()
570{
571}
572
ad8f37d1
ILT
573// The symbol table key equality function. This is called with
574// Stringpool keys.
14bfc3f5 575
ad8f37d1 576inline bool
14bfc3f5
ILT
577Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1,
578 const Symbol_table_key& k2) const
579{
580 return k1.first == k2.first && k1.second == k2.second;
581}
582
ef15dade 583bool
2ea97941 584Symbol_table::is_section_folded(Object* obj, unsigned int shndx) const
ef15dade 585{
032ce4e9 586 return (parameters->options().icf_enabled()
2ea97941 587 && this->icf_->is_section_folded(obj, shndx));
ef15dade
ST
588}
589
31821be0
CC
590// For symbols that have been listed with a -u or --export-dynamic-symbol
591// option, add them to the work list to avoid gc'ing them.
6d03d481
ST
592
593void
88a4108b 594Symbol_table::gc_mark_undef_symbols(Layout* layout)
6d03d481
ST
595{
596 for (options::String_set::const_iterator p =
597 parameters->options().undefined_begin();
598 p != parameters->options().undefined_end();
599 ++p)
600 {
2ea97941
ILT
601 const char* name = p->c_str();
602 Symbol* sym = this->lookup(name);
ca09d69a 603 gold_assert(sym != NULL);
6d03d481
ST
604 if (sym->source() == Symbol::FROM_OBJECT
605 && !sym->object()->is_dynamic())
606 {
e81fea4d 607 this->gc_mark_symbol(sym);
6d03d481
ST
608 }
609 }
88a4108b 610
31821be0
CC
611 for (options::String_set::const_iterator p =
612 parameters->options().export_dynamic_symbol_begin();
613 p != parameters->options().export_dynamic_symbol_end();
614 ++p)
615 {
616 const char* name = p->c_str();
617 Symbol* sym = this->lookup(name);
1d5dfe78
CC
618 // It's not an error if a symbol named by --export-dynamic-symbol
619 // is undefined.
620 if (sym != NULL
621 && sym->source() == Symbol::FROM_OBJECT
31821be0
CC
622 && !sym->object()->is_dynamic())
623 {
e81fea4d 624 this->gc_mark_symbol(sym);
31821be0
CC
625 }
626 }
627
88a4108b
ILT
628 for (Script_options::referenced_const_iterator p =
629 layout->script_options()->referenced_begin();
630 p != layout->script_options()->referenced_end();
631 ++p)
632 {
633 Symbol* sym = this->lookup(p->c_str());
634 gold_assert(sym != NULL);
635 if (sym->source() == Symbol::FROM_OBJECT
636 && !sym->object()->is_dynamic())
637 {
e81fea4d 638 this->gc_mark_symbol(sym);
88a4108b
ILT
639 }
640 }
6d03d481
ST
641}
642
643void
7257cc92 644Symbol_table::gc_mark_symbol(Symbol* sym)
6d03d481 645{
7257cc92 646 // Add the object and section to the work list.
7257cc92
ST
647 bool is_ordinary;
648 unsigned int shndx = sym->shndx(&is_ordinary);
649 if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
6d03d481 650 {
7257cc92 651 gold_assert(this->gc_!= NULL);
4277535c 652 this->gc_->worklist().push_back(Section_id(sym->object(), shndx));
6d03d481 653 }
e81fea4d 654 parameters->target().gc_mark_symbol(this, sym);
6d03d481
ST
655}
656
657// When doing garbage collection, keep symbols that have been seen in
658// dynamic objects.
659inline void
660Symbol_table::gc_mark_dyn_syms(Symbol* sym)
661{
662 if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT
663 && !sym->object()->is_dynamic())
7257cc92 664 this->gc_mark_symbol(sym);
6d03d481
ST
665}
666
dd8670e5 667// Make TO a symbol which forwards to FROM.
14bfc3f5
ILT
668
669void
670Symbol_table::make_forwarder(Symbol* from, Symbol* to)
671{
a3ad94ed
ILT
672 gold_assert(from != to);
673 gold_assert(!from->is_forwarder() && !to->is_forwarder());
14bfc3f5
ILT
674 this->forwarders_[from] = to;
675 from->set_forwarder();
676}
677
61ba1cf9
ILT
678// Resolve the forwards from FROM, returning the real symbol.
679
14bfc3f5 680Symbol*
c06b7b0b 681Symbol_table::resolve_forwards(const Symbol* from) const
14bfc3f5 682{
a3ad94ed 683 gold_assert(from->is_forwarder());
c06b7b0b 684 Unordered_map<const Symbol*, Symbol*>::const_iterator p =
14bfc3f5 685 this->forwarders_.find(from);
a3ad94ed 686 gold_assert(p != this->forwarders_.end());
14bfc3f5
ILT
687 return p->second;
688}
689
61ba1cf9
ILT
690// Look up a symbol by name.
691
692Symbol*
2ea97941 693Symbol_table::lookup(const char* name, const char* version) const
61ba1cf9 694{
f0641a0b 695 Stringpool::Key name_key;
2ea97941
ILT
696 name = this->namepool_.find(name, &name_key);
697 if (name == NULL)
61ba1cf9 698 return NULL;
f0641a0b
ILT
699
700 Stringpool::Key version_key = 0;
2ea97941 701 if (version != NULL)
61ba1cf9 702 {
2ea97941
ILT
703 version = this->namepool_.find(version, &version_key);
704 if (version == NULL)
61ba1cf9
ILT
705 return NULL;
706 }
707
f0641a0b 708 Symbol_table_key key(name_key, version_key);
61ba1cf9
ILT
709 Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
710 if (p == this->table_.end())
711 return NULL;
712 return p->second;
713}
714
14bfc3f5
ILT
715// Resolve a Symbol with another Symbol. This is only used in the
716// unusual case where there are references to both an unversioned
717// symbol and a symbol with a version, and we then discover that that
1564db8d
ILT
718// version is the default version. Because this is unusual, we do
719// this the slow way, by converting back to an ELF symbol.
14bfc3f5 720
1564db8d 721template<int size, bool big_endian>
14bfc3f5 722void
95d14cd3 723Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from)
14bfc3f5 724{
1564db8d
ILT
725 unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
726 elfcpp::Sym_write<size, big_endian> esym(buf);
d491d34e 727 // We don't bother to set the st_name or the st_shndx field.
1564db8d
ILT
728 esym.put_st_value(from->value());
729 esym.put_st_size(from->symsize());
730 esym.put_st_info(from->binding(), from->type());
ead1e424 731 esym.put_st_other(from->visibility(), from->nonvis());
d491d34e 732 bool is_ordinary;
2ea97941
ILT
733 unsigned int shndx = from->shndx(&is_ordinary);
734 this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(),
95d14cd3 735 from->version());
1ebd95fd
ILT
736 if (from->in_reg())
737 to->set_in_reg();
738 if (from->in_dyn())
739 to->set_in_dyn();
6d03d481
ST
740 if (parameters->options().gc_sections())
741 this->gc_mark_dyn_syms(to);
14bfc3f5
ILT
742}
743
0602e05a
ILT
744// Record that a symbol is forced to be local by a version script or
745// by visibility.
55a93433
ILT
746
747void
748Symbol_table::force_local(Symbol* sym)
749{
750 if (!sym->is_defined() && !sym->is_common())
751 return;
752 if (sym->is_forced_local())
753 {
754 // We already got this one.
755 return;
756 }
757 sym->set_is_forced_local();
758 this->forced_locals_.push_back(sym);
759}
760
0864d551
ILT
761// Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
762// is only called for undefined symbols, when at least one --wrap
763// option was used.
764
765const char*
2ea97941 766Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key)
0864d551
ILT
767{
768 // For some targets, we need to ignore a specific character when
769 // wrapping, and add it back later.
770 char prefix = '\0';
2ea97941 771 if (name[0] == parameters->target().wrap_char())
0864d551 772 {
2ea97941
ILT
773 prefix = name[0];
774 ++name;
0864d551
ILT
775 }
776
2ea97941 777 if (parameters->options().is_wrap(name))
0864d551
ILT
778 {
779 // Turn NAME into __wrap_NAME.
780 std::string s;
781 if (prefix != '\0')
782 s += prefix;
783 s += "__wrap_";
2ea97941 784 s += name;
0864d551
ILT
785
786 // This will give us both the old and new name in NAMEPOOL_, but
787 // that is OK. Only the versions we need will wind up in the
788 // real string table in the output file.
789 return this->namepool_.add(s.c_str(), true, name_key);
790 }
791
792 const char* const real_prefix = "__real_";
793 const size_t real_prefix_length = strlen(real_prefix);
2ea97941
ILT
794 if (strncmp(name, real_prefix, real_prefix_length) == 0
795 && parameters->options().is_wrap(name + real_prefix_length))
0864d551
ILT
796 {
797 // Turn __real_NAME into NAME.
798 std::string s;
799 if (prefix != '\0')
800 s += prefix;
2ea97941 801 s += name + real_prefix_length;
0864d551
ILT
802 return this->namepool_.add(s.c_str(), true, name_key);
803 }
804
2ea97941 805 return name;
0864d551
ILT
806}
807
8c500701
ILT
808// This is called when we see a symbol NAME/VERSION, and the symbol
809// already exists in the symbol table, and VERSION is marked as being
810// the default version. SYM is the NAME/VERSION symbol we just added.
811// DEFAULT_IS_NEW is true if this is the first time we have seen the
812// symbol NAME/NULL. PDEF points to the entry for NAME/NULL.
813
814template<int size, bool big_endian>
815void
816Symbol_table::define_default_version(Sized_symbol<size>* sym,
817 bool default_is_new,
818 Symbol_table_type::iterator pdef)
819{
820 if (default_is_new)
821 {
822 // This is the first time we have seen NAME/NULL. Make
823 // NAME/NULL point to NAME/VERSION, and mark SYM as the default
824 // version.
825 pdef->second = sym;
826 sym->set_is_default();
827 }
828 else if (pdef->second == sym)
829 {
830 // NAME/NULL already points to NAME/VERSION. Don't mark the
831 // symbol as the default if it is not already the default.
832 }
833 else
834 {
835 // This is the unfortunate case where we already have entries
836 // for both NAME/VERSION and NAME/NULL. We now see a symbol
837 // NAME/VERSION where VERSION is the default version. We have
838 // already resolved this new symbol with the existing
839 // NAME/VERSION symbol.
840
841 // It's possible that NAME/NULL and NAME/VERSION are both
842 // defined in regular objects. This can only happen if one
843 // object file defines foo and another defines foo@@ver. This
844 // is somewhat obscure, but we call it a multiple definition
845 // error.
846
847 // It's possible that NAME/NULL actually has a version, in which
848 // case it won't be the same as VERSION. This happens with
849 // ver_test_7.so in the testsuite for the symbol t2_2. We see
850 // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We
851 // then see an unadorned t2_2 in an object file and give it
852 // version VER1 from the version script. This looks like a
853 // default definition for VER1, so it looks like we should merge
854 // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's
855 // not obvious that this is an error, either. So we just punt.
856
857 // If one of the symbols has non-default visibility, and the
858 // other is defined in a shared object, then they are different
859 // symbols.
860
861 // Otherwise, we just resolve the symbols as though they were
862 // the same.
863
864 if (pdef->second->version() != NULL)
865 gold_assert(pdef->second->version() != sym->version());
866 else if (sym->visibility() != elfcpp::STV_DEFAULT
867 && pdef->second->is_from_dynobj())
868 ;
869 else if (pdef->second->visibility() != elfcpp::STV_DEFAULT
870 && sym->is_from_dynobj())
871 ;
872 else
873 {
874 const Sized_symbol<size>* symdef;
875 symdef = this->get_sized_symbol<size>(pdef->second);
876 Symbol_table::resolve<size, big_endian>(sym, symdef);
877 this->make_forwarder(pdef->second, sym);
878 pdef->second = sym;
879 sym->set_is_default();
880 }
881 }
882}
883
14bfc3f5
ILT
884// Add one symbol from OBJECT to the symbol table. NAME is symbol
885// name and VERSION is the version; both are canonicalized. DEF is
d491d34e
ILT
886// whether this is the default version. ST_SHNDX is the symbol's
887// section index; IS_ORDINARY is whether this is a normal section
888// rather than a special code.
14bfc3f5 889
8781f709
ILT
890// If IS_DEFAULT_VERSION is true, then this is the definition of a
891// default version of a symbol. That means that any lookup of
892// NAME/NULL and any lookup of NAME/VERSION should always return the
893// same symbol. This is obvious for references, but in particular we
894// want to do this for definitions: overriding NAME/NULL should also
895// override NAME/VERSION. If we don't do that, it would be very hard
896// to override functions in a shared library which uses versioning.
14bfc3f5
ILT
897
898// We implement this by simply making both entries in the hash table
899// point to the same Symbol structure. That is easy enough if this is
900// the first time we see NAME/NULL or NAME/VERSION, but it is possible
901// that we have seen both already, in which case they will both have
902// independent entries in the symbol table. We can't simply change
903// the symbol table entry, because we have pointers to the entries
904// attached to the object files. So we mark the entry attached to the
905// object file as a forwarder, and record it in the forwarders_ map.
906// Note that entries in the hash table will never be marked as
907// forwarders.
70e654ba 908//
d491d34e
ILT
909// ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
910// ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
911// for a special section code. ST_SHNDX may be modified if the symbol
912// is defined in a section being discarded.
14bfc3f5
ILT
913
914template<int size, bool big_endian>
aeddab66 915Sized_symbol<size>*
2ea97941 916Symbol_table::add_from_object(Object* object,
ca09d69a 917 const char* name,
f0641a0b 918 Stringpool::Key name_key,
ca09d69a 919 const char* version,
f0641a0b 920 Stringpool::Key version_key,
8781f709 921 bool is_default_version,
70e654ba 922 const elfcpp::Sym<size, big_endian>& sym,
d491d34e
ILT
923 unsigned int st_shndx,
924 bool is_ordinary,
925 unsigned int orig_st_shndx)
14bfc3f5 926{
c5818ff1 927 // Print a message if this symbol is being traced.
2ea97941 928 if (parameters->options().is_trace_symbol(name))
c5818ff1 929 {
d491d34e 930 if (orig_st_shndx == elfcpp::SHN_UNDEF)
2ea97941 931 gold_info(_("%s: reference to %s"), object->name().c_str(), name);
c5818ff1 932 else
2ea97941 933 gold_info(_("%s: definition of %s"), object->name().c_str(), name);
c5818ff1
CC
934 }
935
0864d551
ILT
936 // For an undefined symbol, we may need to adjust the name using
937 // --wrap.
d491d34e 938 if (orig_st_shndx == elfcpp::SHN_UNDEF
c5818ff1 939 && parameters->options().any_wrap())
0864d551 940 {
2ea97941
ILT
941 const char* wrap_name = this->wrap_symbol(name, &name_key);
942 if (wrap_name != name)
0864d551
ILT
943 {
944 // If we see a reference to malloc with version GLIBC_2.0,
945 // and we turn it into a reference to __wrap_malloc, then we
946 // discard the version number. Otherwise the user would be
947 // required to specify the correct version for
948 // __wrap_malloc.
2ea97941 949 version = NULL;
0864d551 950 version_key = 0;
2ea97941 951 name = wrap_name;
0864d551
ILT
952 }
953 }
954
14bfc3f5
ILT
955 Symbol* const snull = NULL;
956 std::pair<typename Symbol_table_type::iterator, bool> ins =
f0641a0b
ILT
957 this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
958 snull));
14bfc3f5 959
8781f709 960 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
14bfc3f5 961 std::make_pair(this->table_.end(), false);
8781f709 962 if (is_default_version)
14bfc3f5 963 {
f0641a0b 964 const Stringpool::Key vnull_key = 0;
8781f709
ILT
965 insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key,
966 vnull_key),
967 snull));
14bfc3f5
ILT
968 }
969
970 // ins.first: an iterator, which is a pointer to a pair.
971 // ins.first->first: the key (a pair of name and version).
972 // ins.first->second: the value (Symbol*).
973 // ins.second: true if new entry was inserted, false if not.
974
1564db8d 975 Sized_symbol<size>* ret;
ead1e424
ILT
976 bool was_undefined;
977 bool was_common;
14bfc3f5
ILT
978 if (!ins.second)
979 {
980 // We already have an entry for NAME/VERSION.
7d1a9ebb 981 ret = this->get_sized_symbol<size>(ins.first->second);
a3ad94ed 982 gold_assert(ret != NULL);
ead1e424
ILT
983
984 was_undefined = ret->is_undefined();
1707f183
CC
985 // Commons from plugins are just placeholders.
986 was_common = ret->is_common() && ret->object()->pluginobj() == NULL;
ead1e424 987
2ea97941
ILT
988 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
989 version);
6d03d481
ST
990 if (parameters->options().gc_sections())
991 this->gc_mark_dyn_syms(ret);
14bfc3f5 992
8781f709
ILT
993 if (is_default_version)
994 this->define_default_version<size, big_endian>(ret, insdefault.second,
995 insdefault.first);
14bfc3f5
ILT
996 }
997 else
998 {
999 // This is the first time we have seen NAME/VERSION.
a3ad94ed 1000 gold_assert(ins.first->second == NULL);
ead1e424 1001
8781f709 1002 if (is_default_version && !insdefault.second)
14bfc3f5 1003 {
14b31740
ILT
1004 // We already have an entry for NAME/NULL. If we override
1005 // it, then change it to NAME/VERSION.
8781f709 1006 ret = this->get_sized_symbol<size>(insdefault.first->second);
18e6b24e
ILT
1007
1008 was_undefined = ret->is_undefined();
1707f183
CC
1009 // Commons from plugins are just placeholders.
1010 was_common = ret->is_common() && ret->object()->pluginobj() == NULL;
18e6b24e 1011
2ea97941
ILT
1012 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
1013 version);
6d03d481
ST
1014 if (parameters->options().gc_sections())
1015 this->gc_mark_dyn_syms(ret);
14bfc3f5
ILT
1016 ins.first->second = ret;
1017 }
1018 else
1019 {
18e6b24e
ILT
1020 was_undefined = false;
1021 was_common = false;
1022
f6ce93d6 1023 Sized_target<size, big_endian>* target =
029ba973 1024 parameters->sized_target<size, big_endian>();
1564db8d
ILT
1025 if (!target->has_make_symbol())
1026 ret = new Sized_symbol<size>();
1027 else
14bfc3f5 1028 {
1564db8d
ILT
1029 ret = target->make_symbol();
1030 if (ret == NULL)
14bfc3f5
ILT
1031 {
1032 // This means that we don't want a symbol table
1033 // entry after all.
8781f709 1034 if (!is_default_version)
14bfc3f5
ILT
1035 this->table_.erase(ins.first);
1036 else
1037 {
8781f709
ILT
1038 this->table_.erase(insdefault.first);
1039 // Inserting INSDEFAULT invalidated INS.
f0641a0b
ILT
1040 this->table_.erase(std::make_pair(name_key,
1041 version_key));
14bfc3f5
ILT
1042 }
1043 return NULL;
1044 }
1045 }
14bfc3f5 1046
2ea97941 1047 ret->init_object(name, version, object, sym, st_shndx, is_ordinary);
1564db8d 1048
14bfc3f5 1049 ins.first->second = ret;
8781f709 1050 if (is_default_version)
14bfc3f5
ILT
1051 {
1052 // This is the first time we have seen NAME/NULL. Point
1053 // it at the new entry for NAME/VERSION.
8781f709
ILT
1054 gold_assert(insdefault.second);
1055 insdefault.first->second = ret;
14bfc3f5
ILT
1056 }
1057 }
8c500701 1058
8781f709 1059 if (is_default_version)
8c500701 1060 ret->set_is_default();
14bfc3f5
ILT
1061 }
1062
ead1e424
ILT
1063 // Record every time we see a new undefined symbol, to speed up
1064 // archive groups.
1065 if (!was_undefined && ret->is_undefined())
0f3b89d8
ILT
1066 {
1067 ++this->saw_undefined_;
1068 if (parameters->options().has_plugins())
1069 parameters->options().plugins()->new_undefined_symbol(ret);
1070 }
ead1e424
ILT
1071
1072 // Keep track of common symbols, to speed up common symbol
1707f183
CC
1073 // allocation. Don't record commons from plugin objects;
1074 // we need to wait until we see the real symbol in the
1075 // replacement file.
1076 if (!was_common && ret->is_common() && ret->object()->pluginobj() == NULL)
155a0dd7 1077 {
8a5e3e08 1078 if (ret->type() == elfcpp::STT_TLS)
155a0dd7 1079 this->tls_commons_.push_back(ret);
8a5e3e08
ILT
1080 else if (!is_ordinary
1081 && st_shndx == parameters->target().small_common_shndx())
1082 this->small_commons_.push_back(ret);
1083 else if (!is_ordinary
1084 && st_shndx == parameters->target().large_common_shndx())
1085 this->large_commons_.push_back(ret);
1086 else
1087 this->commons_.push_back(ret);
155a0dd7 1088 }
ead1e424 1089
0602e05a
ILT
1090 // If we're not doing a relocatable link, then any symbol with
1091 // hidden or internal visibility is local.
1092 if ((ret->visibility() == elfcpp::STV_HIDDEN
1093 || ret->visibility() == elfcpp::STV_INTERNAL)
1094 && (ret->binding() == elfcpp::STB_GLOBAL
adcf2816 1095 || ret->binding() == elfcpp::STB_GNU_UNIQUE
0602e05a
ILT
1096 || ret->binding() == elfcpp::STB_WEAK)
1097 && !parameters->options().relocatable())
1098 this->force_local(ret);
1099
14bfc3f5
ILT
1100 return ret;
1101}
1102
f6ce93d6 1103// Add all the symbols in a relocatable object to the hash table.
14bfc3f5
ILT
1104
1105template<int size, bool big_endian>
1106void
dbe717ef 1107Symbol_table::add_from_relobj(
6fa2a40b 1108 Sized_relobj_file<size, big_endian>* relobj,
f6ce93d6 1109 const unsigned char* syms,
14bfc3f5 1110 size_t count,
d491d34e 1111 size_t symndx_offset,
14bfc3f5
ILT
1112 const char* sym_names,
1113 size_t sym_name_size,
6fa2a40b 1114 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
ca09d69a 1115 size_t* defined)
14bfc3f5 1116{
92de84a6
ILT
1117 *defined = 0;
1118
8851ecca 1119 gold_assert(size == parameters->target().get_size());
14bfc3f5 1120
a783673b
ILT
1121 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1122
88dd47ac
ILT
1123 const bool just_symbols = relobj->just_symbols();
1124
f6ce93d6 1125 const unsigned char* p = syms;
a783673b 1126 for (size_t i = 0; i < count; ++i, p += sym_size)
14bfc3f5 1127 {
92de84a6
ILT
1128 (*sympointers)[i] = NULL;
1129
14bfc3f5
ILT
1130 elfcpp::Sym<size, big_endian> sym(p);
1131
d491d34e 1132 unsigned int st_name = sym.get_st_name();
14bfc3f5
ILT
1133 if (st_name >= sym_name_size)
1134 {
75f2446e
ILT
1135 relobj->error(_("bad global symbol name offset %u at %zu"),
1136 st_name, i);
1137 continue;
14bfc3f5
ILT
1138 }
1139
2ea97941 1140 const char* name = sym_names + st_name;
dbe717ef 1141
7cd4e5b7
AM
1142 if (strcmp (name, "__gnu_lto_slim") == 0)
1143 gold_info(_("%s: plugin needed to handle lto object"),
1144 relobj->name().c_str());
1145
d491d34e
ILT
1146 bool is_ordinary;
1147 unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset,
1148 sym.get_st_shndx(),
1149 &is_ordinary);
1150 unsigned int orig_st_shndx = st_shndx;
1151 if (!is_ordinary)
1152 orig_st_shndx = elfcpp::SHN_UNDEF;
1153
92de84a6
ILT
1154 if (st_shndx != elfcpp::SHN_UNDEF)
1155 ++*defined;
1156
a783673b
ILT
1157 // A symbol defined in a section which we are not including must
1158 // be treated as an undefined symbol.
880cd20d 1159 bool is_defined_in_discarded_section = false;
a783673b 1160 if (st_shndx != elfcpp::SHN_UNDEF
d491d34e 1161 && is_ordinary
ce97fa81
ST
1162 && !relobj->is_section_included(st_shndx)
1163 && !this->is_section_folded(relobj, st_shndx))
880cd20d
ILT
1164 {
1165 st_shndx = elfcpp::SHN_UNDEF;
1166 is_defined_in_discarded_section = true;
1167 }
a783673b 1168
14bfc3f5
ILT
1169 // In an object file, an '@' in the name separates the symbol
1170 // name from the version name. If there are two '@' characters,
1171 // this is the default version.
2ea97941 1172 const char* ver = strchr(name, '@');
057ead22 1173 Stringpool::Key ver_key = 0;
09124467 1174 int namelen = 0;
8781f709
ILT
1175 // IS_DEFAULT_VERSION: is the version default?
1176 // IS_FORCED_LOCAL: is the symbol forced local?
1177 bool is_default_version = false;
1178 bool is_forced_local = false;
09124467 1179
a7dac153
CC
1180 // FIXME: For incremental links, we don't store version information,
1181 // so we need to ignore version symbols for now.
1182 if (parameters->incremental_update() && ver != NULL)
1183 {
1184 namelen = ver - name;
1185 ver = NULL;
1186 }
1187
09124467
ILT
1188 if (ver != NULL)
1189 {
1190 // The symbol name is of the form foo@VERSION or foo@@VERSION
2ea97941 1191 namelen = ver - name;
09124467
ILT
1192 ++ver;
1193 if (*ver == '@')
1194 {
8781f709 1195 is_default_version = true;
09124467
ILT
1196 ++ver;
1197 }
057ead22 1198 ver = this->namepool_.add(ver, true, &ver_key);
09124467 1199 }
5871526f
ILT
1200 // We don't want to assign a version to an undefined symbol,
1201 // even if it is listed in the version script. FIXME: What
1202 // about a common symbol?
057ead22
ILT
1203 else
1204 {
2ea97941 1205 namelen = strlen(name);
057ead22
ILT
1206 if (!this->version_script_.empty()
1207 && st_shndx != elfcpp::SHN_UNDEF)
1208 {
1209 // The symbol name did not have a version, but the
1210 // version script may assign a version anyway.
2ea97941 1211 std::string version;
98e090bd
ILT
1212 bool is_global;
1213 if (this->version_script_.get_symbol_version(name, &version,
1214 &is_global))
057ead22 1215 {
98e090bd
ILT
1216 if (!is_global)
1217 is_forced_local = true;
1218 else if (!version.empty())
057ead22 1219 {
2ea97941
ILT
1220 ver = this->namepool_.add_with_length(version.c_str(),
1221 version.length(),
057ead22
ILT
1222 true,
1223 &ver_key);
8781f709 1224 is_default_version = true;
057ead22
ILT
1225 }
1226 }
057ead22
ILT
1227 }
1228 }
14bfc3f5 1229
d491d34e
ILT
1230 elfcpp::Sym<size, big_endian>* psym = &sym;
1231 unsigned char symbuf[sym_size];
1232 elfcpp::Sym<size, big_endian> sym2(symbuf);
88dd47ac
ILT
1233 if (just_symbols)
1234 {
d491d34e 1235 memcpy(symbuf, p, sym_size);
88dd47ac 1236 elfcpp::Sym_write<size, big_endian> sw(symbuf);
9590bf25
CC
1237 if (orig_st_shndx != elfcpp::SHN_UNDEF
1238 && is_ordinary
1239 && relobj->e_type() == elfcpp::ET_REL)
88dd47ac 1240 {
9590bf25
CC
1241 // Symbol values in relocatable object files are section
1242 // relative. This is normally what we want, but since here
1243 // we are converting the symbol to absolute we need to add
1244 // the section address. The section address in an object
88dd47ac
ILT
1245 // file is normally zero, but people can use a linker
1246 // script to change it.
d491d34e
ILT
1247 sw.put_st_value(sym.get_st_value()
1248 + relobj->section_address(orig_st_shndx));
88dd47ac 1249 }
d491d34e
ILT
1250 st_shndx = elfcpp::SHN_ABS;
1251 is_ordinary = false;
88dd47ac
ILT
1252 psym = &sym2;
1253 }
1254
65514900 1255 // Fix up visibility if object has no-export set.
1c74fab0
ILT
1256 if (relobj->no_export()
1257 && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary))
65514900
CC
1258 {
1259 // We may have copied symbol already above.
1260 if (psym != &sym2)
1261 {
1262 memcpy(symbuf, p, sym_size);
1263 psym = &sym2;
1264 }
1265
1266 elfcpp::STV visibility = sym2.get_st_visibility();
1267 if (visibility == elfcpp::STV_DEFAULT
1268 || visibility == elfcpp::STV_PROTECTED)
1269 {
1270 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1271 unsigned char nonvis = sym2.get_st_nonvis();
1272 sw.put_st_other(elfcpp::STV_HIDDEN, nonvis);
1273 }
1274 }
1275
057ead22 1276 Stringpool::Key name_key;
2ea97941 1277 name = this->namepool_.add_with_length(name, namelen, true,
057ead22
ILT
1278 &name_key);
1279
aeddab66 1280 Sized_symbol<size>* res;
2ea97941 1281 res = this->add_from_object(relobj, name, name_key, ver, ver_key,
8781f709
ILT
1282 is_default_version, *psym, st_shndx,
1283 is_ordinary, orig_st_shndx);
6d03d481 1284
804eb480
ST
1285 if (is_forced_local)
1286 this->force_local(res);
1287
7257cc92
ST
1288 // Do not treat this symbol as garbage if this symbol will be
1289 // exported to the dynamic symbol table. This is true when
1290 // building a shared library or using --export-dynamic and
1291 // the symbol is externally visible.
1292 if (parameters->options().gc_sections()
1293 && res->is_externally_visible()
1294 && !res->is_from_dynobj()
1295 && (parameters->options().shared()
fd834e57
CC
1296 || parameters->options().export_dynamic()
1297 || parameters->options().in_dynamic_list(res->name())))
7257cc92 1298 this->gc_mark_symbol(res);
f0641a0b 1299
880cd20d
ILT
1300 if (is_defined_in_discarded_section)
1301 res->set_is_defined_in_discarded_section();
1302
730cdc88 1303 (*sympointers)[i] = res;
14bfc3f5
ILT
1304 }
1305}
1306
89fc3421
CC
1307// Add a symbol from a plugin-claimed file.
1308
1309template<int size, bool big_endian>
1310Symbol*
1311Symbol_table::add_from_pluginobj(
1312 Sized_pluginobj<size, big_endian>* obj,
2ea97941 1313 const char* name,
89fc3421
CC
1314 const char* ver,
1315 elfcpp::Sym<size, big_endian>* sym)
1316{
1317 unsigned int st_shndx = sym->get_st_shndx();
24998053 1318 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
89fc3421
CC
1319
1320 Stringpool::Key ver_key = 0;
8781f709
ILT
1321 bool is_default_version = false;
1322 bool is_forced_local = false;
89fc3421
CC
1323
1324 if (ver != NULL)
1325 {
1326 ver = this->namepool_.add(ver, true, &ver_key);
1327 }
1328 // We don't want to assign a version to an undefined symbol,
1329 // even if it is listed in the version script. FIXME: What
1330 // about a common symbol?
1331 else
1332 {
1333 if (!this->version_script_.empty()
1334 && st_shndx != elfcpp::SHN_UNDEF)
1335 {
1336 // The symbol name did not have a version, but the
1337 // version script may assign a version anyway.
2ea97941 1338 std::string version;
98e090bd
ILT
1339 bool is_global;
1340 if (this->version_script_.get_symbol_version(name, &version,
1341 &is_global))
89fc3421 1342 {
98e090bd
ILT
1343 if (!is_global)
1344 is_forced_local = true;
1345 else if (!version.empty())
89fc3421 1346 {
2ea97941
ILT
1347 ver = this->namepool_.add_with_length(version.c_str(),
1348 version.length(),
89fc3421
CC
1349 true,
1350 &ver_key);
8781f709 1351 is_default_version = true;
89fc3421
CC
1352 }
1353 }
89fc3421
CC
1354 }
1355 }
1356
1357 Stringpool::Key name_key;
2ea97941 1358 name = this->namepool_.add(name, true, &name_key);
89fc3421
CC
1359
1360 Sized_symbol<size>* res;
2ea97941 1361 res = this->add_from_object(obj, name, name_key, ver, ver_key,
8781f709
ILT
1362 is_default_version, *sym, st_shndx,
1363 is_ordinary, st_shndx);
89fc3421 1364
8781f709 1365 if (is_forced_local)
0602e05a 1366 this->force_local(res);
89fc3421
CC
1367
1368 return res;
1369}
1370
dbe717ef
ILT
1371// Add all the symbols in a dynamic object to the hash table.
1372
1373template<int size, bool big_endian>
1374void
1375Symbol_table::add_from_dynobj(
1376 Sized_dynobj<size, big_endian>* dynobj,
1377 const unsigned char* syms,
1378 size_t count,
1379 const char* sym_names,
1380 size_t sym_name_size,
1381 const unsigned char* versym,
1382 size_t versym_size,
92de84a6 1383 const std::vector<const char*>* version_map,
6fa2a40b 1384 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
92de84a6 1385 size_t* defined)
dbe717ef 1386{
92de84a6
ILT
1387 *defined = 0;
1388
8851ecca 1389 gold_assert(size == parameters->target().get_size());
dbe717ef 1390
88dd47ac
ILT
1391 if (dynobj->just_symbols())
1392 {
1393 gold_error(_("--just-symbols does not make sense with a shared object"));
1394 return;
1395 }
1396
a7dac153
CC
1397 // FIXME: For incremental links, we don't store version information,
1398 // so we need to ignore version symbols for now.
1399 if (parameters->incremental_update())
1400 versym = NULL;
1401
dbe717ef
ILT
1402 if (versym != NULL && versym_size / 2 < count)
1403 {
75f2446e
ILT
1404 dynobj->error(_("too few symbol versions"));
1405 return;
dbe717ef
ILT
1406 }
1407
1408 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1409
aeddab66
ILT
1410 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1411 // weak aliases. This is necessary because if the dynamic object
1412 // provides the same variable under two names, one of which is a
1413 // weak definition, and the regular object refers to the weak
1414 // definition, we have to put both the weak definition and the
1415 // strong definition into the dynamic symbol table. Given a weak
1416 // definition, the only way that we can find the corresponding
1417 // strong definition, if any, is to search the symbol table.
1418 std::vector<Sized_symbol<size>*> object_symbols;
1419
dbe717ef
ILT
1420 const unsigned char* p = syms;
1421 const unsigned char* vs = versym;
1422 for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
1423 {
1424 elfcpp::Sym<size, big_endian> sym(p);
1425
92de84a6
ILT
1426 if (sympointers != NULL)
1427 (*sympointers)[i] = NULL;
1428
65778909
ILT
1429 // Ignore symbols with local binding or that have
1430 // internal or hidden visibility.
1431 if (sym.get_st_bind() == elfcpp::STB_LOCAL
1432 || sym.get_st_visibility() == elfcpp::STV_INTERNAL
1433 || sym.get_st_visibility() == elfcpp::STV_HIDDEN)
dbe717ef
ILT
1434 continue;
1435
8bdcdf2c
ILT
1436 // A protected symbol in a shared library must be treated as a
1437 // normal symbol when viewed from outside the shared library.
1438 // Implement this by overriding the visibility here.
1439 elfcpp::Sym<size, big_endian>* psym = &sym;
1440 unsigned char symbuf[sym_size];
1441 elfcpp::Sym<size, big_endian> sym2(symbuf);
1442 if (sym.get_st_visibility() == elfcpp::STV_PROTECTED)
1443 {
1444 memcpy(symbuf, p, sym_size);
1445 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1446 sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis());
1447 psym = &sym2;
1448 }
1449
1450 unsigned int st_name = psym->get_st_name();
dbe717ef
ILT
1451 if (st_name >= sym_name_size)
1452 {
75f2446e
ILT
1453 dynobj->error(_("bad symbol name offset %u at %zu"),
1454 st_name, i);
1455 continue;
dbe717ef
ILT
1456 }
1457
2ea97941 1458 const char* name = sym_names + st_name;
dbe717ef 1459
d491d34e 1460 bool is_ordinary;
8bdcdf2c 1461 unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(),
d491d34e
ILT
1462 &is_ordinary);
1463
92de84a6
ILT
1464 if (st_shndx != elfcpp::SHN_UNDEF)
1465 ++*defined;
1466
aeddab66
ILT
1467 Sized_symbol<size>* res;
1468
dbe717ef
ILT
1469 if (versym == NULL)
1470 {
1471 Stringpool::Key name_key;
2ea97941
ILT
1472 name = this->namepool_.add(name, true, &name_key);
1473 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1474 false, *psym, st_shndx, is_ordinary,
d491d34e 1475 st_shndx);
dbe717ef 1476 }
aeddab66
ILT
1477 else
1478 {
1479 // Read the version information.
dbe717ef 1480
aeddab66 1481 unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
dbe717ef 1482
aeddab66
ILT
1483 bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
1484 v &= elfcpp::VERSYM_VERSION;
dbe717ef 1485
aeddab66
ILT
1486 // The Sun documentation says that V can be VER_NDX_LOCAL,
1487 // or VER_NDX_GLOBAL, or a version index. The meaning of
1488 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1489 // The old GNU linker will happily generate VER_NDX_LOCAL
1490 // for an undefined symbol. I don't know what the Sun
1491 // linker will generate.
dbe717ef 1492
aeddab66 1493 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
d491d34e 1494 && st_shndx != elfcpp::SHN_UNDEF)
aeddab66
ILT
1495 {
1496 // This symbol should not be visible outside the object.
1497 continue;
1498 }
64707334 1499
aeddab66
ILT
1500 // At this point we are definitely going to add this symbol.
1501 Stringpool::Key name_key;
2ea97941 1502 name = this->namepool_.add(name, true, &name_key);
dbe717ef 1503
aeddab66
ILT
1504 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1505 || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
1506 {
1507 // This symbol does not have a version.
2ea97941 1508 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1509 false, *psym, st_shndx, is_ordinary,
d491d34e 1510 st_shndx);
aeddab66
ILT
1511 }
1512 else
1513 {
1514 if (v >= version_map->size())
1515 {
1516 dynobj->error(_("versym for symbol %zu out of range: %u"),
1517 i, v);
1518 continue;
1519 }
dbe717ef 1520
2ea97941
ILT
1521 const char* version = (*version_map)[v];
1522 if (version == NULL)
aeddab66
ILT
1523 {
1524 dynobj->error(_("versym for symbol %zu has no name: %u"),
1525 i, v);
1526 continue;
1527 }
dbe717ef 1528
aeddab66 1529 Stringpool::Key version_key;
2ea97941 1530 version = this->namepool_.add(version, true, &version_key);
aeddab66
ILT
1531
1532 // If this is an absolute symbol, and the version name
1533 // and symbol name are the same, then this is the
1534 // version definition symbol. These symbols exist to
1535 // support using -u to pull in particular versions. We
1536 // do not want to record a version for them.
d491d34e
ILT
1537 if (st_shndx == elfcpp::SHN_ABS
1538 && !is_ordinary
aeddab66 1539 && name_key == version_key)
2ea97941 1540 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1541 false, *psym, st_shndx, is_ordinary,
d491d34e 1542 st_shndx);
aeddab66
ILT
1543 else
1544 {
8781f709
ILT
1545 const bool is_default_version =
1546 !hidden && st_shndx != elfcpp::SHN_UNDEF;
2ea97941 1547 res = this->add_from_object(dynobj, name, name_key, version,
8781f709
ILT
1548 version_key, is_default_version,
1549 *psym, st_shndx,
d491d34e 1550 is_ordinary, st_shndx);
aeddab66
ILT
1551 }
1552 }
dbe717ef
ILT
1553 }
1554
99a37bfd 1555 // Note that it is possible that RES was overridden by an
a4bb589a 1556 // earlier object, in which case it can't be aliased here.
d491d34e
ILT
1557 if (st_shndx != elfcpp::SHN_UNDEF
1558 && is_ordinary
8bdcdf2c 1559 && psym->get_st_type() == elfcpp::STT_OBJECT
99a37bfd
ILT
1560 && res->source() == Symbol::FROM_OBJECT
1561 && res->object() == dynobj)
aeddab66 1562 object_symbols.push_back(res);
92de84a6
ILT
1563
1564 if (sympointers != NULL)
1565 (*sympointers)[i] = res;
aeddab66
ILT
1566 }
1567
1568 this->record_weak_aliases(&object_symbols);
1569}
1570
cdc29364
CC
1571// Add a symbol from a incremental object file.
1572
1573template<int size, bool big_endian>
26d3c67d 1574Sized_symbol<size>*
cdc29364
CC
1575Symbol_table::add_from_incrobj(
1576 Object* obj,
1577 const char* name,
1578 const char* ver,
1579 elfcpp::Sym<size, big_endian>* sym)
1580{
1581 unsigned int st_shndx = sym->get_st_shndx();
1582 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
1583
1584 Stringpool::Key ver_key = 0;
1585 bool is_default_version = false;
1586 bool is_forced_local = false;
1587
1588 Stringpool::Key name_key;
1589 name = this->namepool_.add(name, true, &name_key);
1590
1591 Sized_symbol<size>* res;
1592 res = this->add_from_object(obj, name, name_key, ver, ver_key,
1593 is_default_version, *sym, st_shndx,
1594 is_ordinary, st_shndx);
1595
1596 if (is_forced_local)
1597 this->force_local(res);
1598
1599 return res;
1600}
1601
aeddab66
ILT
1602// This is used to sort weak aliases. We sort them first by section
1603// index, then by offset, then by weak ahead of strong.
1604
1605template<int size>
1606class Weak_alias_sorter
1607{
1608 public:
1609 bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const;
1610};
1611
1612template<int size>
1613bool
1614Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1,
1615 const Sized_symbol<size>* s2) const
1616{
d491d34e
ILT
1617 bool is_ordinary;
1618 unsigned int s1_shndx = s1->shndx(&is_ordinary);
1619 gold_assert(is_ordinary);
1620 unsigned int s2_shndx = s2->shndx(&is_ordinary);
1621 gold_assert(is_ordinary);
1622 if (s1_shndx != s2_shndx)
1623 return s1_shndx < s2_shndx;
1624
aeddab66
ILT
1625 if (s1->value() != s2->value())
1626 return s1->value() < s2->value();
1627 if (s1->binding() != s2->binding())
1628 {
1629 if (s1->binding() == elfcpp::STB_WEAK)
1630 return true;
1631 if (s2->binding() == elfcpp::STB_WEAK)
1632 return false;
1633 }
1634 return std::string(s1->name()) < std::string(s2->name());
1635}
dbe717ef 1636
aeddab66
ILT
1637// SYMBOLS is a list of object symbols from a dynamic object. Look
1638// for any weak aliases, and record them so that if we add the weak
1639// alias to the dynamic symbol table, we also add the corresponding
1640// strong symbol.
dbe717ef 1641
aeddab66
ILT
1642template<int size>
1643void
1644Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols)
1645{
1646 // Sort the vector by section index, then by offset, then by weak
1647 // ahead of strong.
1648 std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>());
1649
1650 // Walk through the vector. For each weak definition, record
1651 // aliases.
1652 for (typename std::vector<Sized_symbol<size>*>::const_iterator p =
1653 symbols->begin();
1654 p != symbols->end();
1655 ++p)
1656 {
1657 if ((*p)->binding() != elfcpp::STB_WEAK)
1658 continue;
1659
1660 // Build a circular list of weak aliases. Each symbol points to
1661 // the next one in the circular list.
1662
1663 Sized_symbol<size>* from_sym = *p;
1664 typename std::vector<Sized_symbol<size>*>::const_iterator q;
1665 for (q = p + 1; q != symbols->end(); ++q)
dbe717ef 1666 {
d491d34e
ILT
1667 bool dummy;
1668 if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy)
aeddab66
ILT
1669 || (*q)->value() != from_sym->value())
1670 break;
1671
1672 this->weak_aliases_[from_sym] = *q;
1673 from_sym->set_has_alias();
1674 from_sym = *q;
dbe717ef
ILT
1675 }
1676
aeddab66
ILT
1677 if (from_sym != *p)
1678 {
1679 this->weak_aliases_[from_sym] = *p;
1680 from_sym->set_has_alias();
1681 }
dbe717ef 1682
aeddab66 1683 p = q - 1;
dbe717ef
ILT
1684 }
1685}
1686
ead1e424
ILT
1687// Create and return a specially defined symbol. If ONLY_IF_REF is
1688// true, then only create the symbol if there is a reference to it.
86f2e683 1689// If this does not return NULL, it sets *POLDSYM to the existing
8c500701
ILT
1690// symbol if there is one. This sets *RESOLVE_OLDSYM if we should
1691// resolve the newly created symbol to the old one. This
1692// canonicalizes *PNAME and *PVERSION.
ead1e424
ILT
1693
1694template<int size, bool big_endian>
1695Sized_symbol<size>*
9b07f471
ILT
1696Symbol_table::define_special_symbol(const char** pname, const char** pversion,
1697 bool only_if_ref,
8c500701 1698 Sized_symbol<size>** poldsym,
ca09d69a 1699 bool* resolve_oldsym)
ead1e424 1700{
8c500701 1701 *resolve_oldsym = false;
8cc69fb6 1702 *poldsym = NULL;
ead1e424 1703
55a93433
ILT
1704 // If the caller didn't give us a version, see if we get one from
1705 // the version script.
057ead22 1706 std::string v;
8c500701 1707 bool is_default_version = false;
55a93433
ILT
1708 if (*pversion == NULL)
1709 {
98e090bd
ILT
1710 bool is_global;
1711 if (this->version_script_.get_symbol_version(*pname, &v, &is_global))
057ead22 1712 {
98e090bd
ILT
1713 if (is_global && !v.empty())
1714 {
1715 *pversion = v.c_str();
1716 // If we get the version from a version script, then we
1717 // are also the default version.
1718 is_default_version = true;
1719 }
057ead22 1720 }
55a93433
ILT
1721 }
1722
8c500701
ILT
1723 Symbol* oldsym;
1724 Sized_symbol<size>* sym;
1725
1726 bool add_to_table = false;
1727 typename Symbol_table_type::iterator add_loc = this->table_.end();
1728 bool add_def_to_table = false;
1729 typename Symbol_table_type::iterator add_def_loc = this->table_.end();
1730
ead1e424
ILT
1731 if (only_if_ref)
1732 {
306d9ef0 1733 oldsym = this->lookup(*pname, *pversion);
8c500701
ILT
1734 if (oldsym == NULL && is_default_version)
1735 oldsym = this->lookup(*pname, NULL);
f6ce93d6 1736 if (oldsym == NULL || !oldsym->is_undefined())
ead1e424 1737 return NULL;
306d9ef0
ILT
1738
1739 *pname = oldsym->name();
eebd87a5
ILT
1740 if (is_default_version)
1741 *pversion = this->namepool_.add(*pversion, true, NULL);
1742 else
8c500701 1743 *pversion = oldsym->version();
ead1e424
ILT
1744 }
1745 else
1746 {
14b31740 1747 // Canonicalize NAME and VERSION.
f0641a0b 1748 Stringpool::Key name_key;
cfd73a4e 1749 *pname = this->namepool_.add(*pname, true, &name_key);
ead1e424 1750
14b31740 1751 Stringpool::Key version_key = 0;
306d9ef0 1752 if (*pversion != NULL)
cfd73a4e 1753 *pversion = this->namepool_.add(*pversion, true, &version_key);
14b31740 1754
ead1e424 1755 Symbol* const snull = NULL;
ead1e424 1756 std::pair<typename Symbol_table_type::iterator, bool> ins =
14b31740
ILT
1757 this->table_.insert(std::make_pair(std::make_pair(name_key,
1758 version_key),
ead1e424
ILT
1759 snull));
1760
8781f709 1761 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
8c500701
ILT
1762 std::make_pair(this->table_.end(), false);
1763 if (is_default_version)
1764 {
1765 const Stringpool::Key vnull = 0;
8781f709
ILT
1766 insdefault =
1767 this->table_.insert(std::make_pair(std::make_pair(name_key,
1768 vnull),
1769 snull));
8c500701
ILT
1770 }
1771
ead1e424
ILT
1772 if (!ins.second)
1773 {
14b31740 1774 // We already have a symbol table entry for NAME/VERSION.
ead1e424 1775 oldsym = ins.first->second;
a3ad94ed 1776 gold_assert(oldsym != NULL);
8c500701
ILT
1777
1778 if (is_default_version)
1779 {
1780 Sized_symbol<size>* soldsym =
1781 this->get_sized_symbol<size>(oldsym);
1782 this->define_default_version<size, big_endian>(soldsym,
8781f709
ILT
1783 insdefault.second,
1784 insdefault.first);
8c500701 1785 }
ead1e424
ILT
1786 }
1787 else
1788 {
1789 // We haven't seen this symbol before.
a3ad94ed 1790 gold_assert(ins.first->second == NULL);
8c500701
ILT
1791
1792 add_to_table = true;
1793 add_loc = ins.first;
1794
8781f709 1795 if (is_default_version && !insdefault.second)
8c500701
ILT
1796 {
1797 // We are adding NAME/VERSION, and it is the default
1798 // version. We already have an entry for NAME/NULL.
8781f709 1799 oldsym = insdefault.first->second;
8c500701
ILT
1800 *resolve_oldsym = true;
1801 }
1802 else
1803 {
1804 oldsym = NULL;
1805
1806 if (is_default_version)
1807 {
1808 add_def_to_table = true;
8781f709 1809 add_def_loc = insdefault.first;
8c500701
ILT
1810 }
1811 }
ead1e424
ILT
1812 }
1813 }
1814
8851ecca
ILT
1815 const Target& target = parameters->target();
1816 if (!target.has_make_symbol())
86f2e683
ILT
1817 sym = new Sized_symbol<size>();
1818 else
ead1e424 1819 {
029ba973
ILT
1820 Sized_target<size, big_endian>* sized_target =
1821 parameters->sized_target<size, big_endian>();
86f2e683
ILT
1822 sym = sized_target->make_symbol();
1823 if (sym == NULL)
1824 return NULL;
1825 }
ead1e424 1826
86f2e683
ILT
1827 if (add_to_table)
1828 add_loc->second = sym;
1829 else
1830 gold_assert(oldsym != NULL);
ead1e424 1831
8c500701
ILT
1832 if (add_def_to_table)
1833 add_def_loc->second = sym;
1834
7d1a9ebb 1835 *poldsym = this->get_sized_symbol<size>(oldsym);
ead1e424
ILT
1836
1837 return sym;
1838}
1839
1840// Define a symbol based on an Output_data.
1841
14b31740 1842Symbol*
2ea97941
ILT
1843Symbol_table::define_in_output_data(const char* name,
1844 const char* version,
99fff23b 1845 Defined defined,
9b07f471 1846 Output_data* od,
2ea97941
ILT
1847 uint64_t value,
1848 uint64_t symsize,
9b07f471
ILT
1849 elfcpp::STT type,
1850 elfcpp::STB binding,
ead1e424
ILT
1851 elfcpp::STV visibility,
1852 unsigned char nonvis,
2ea97941 1853 bool offset_is_from_end,
ead1e424
ILT
1854 bool only_if_ref)
1855{
8851ecca 1856 if (parameters->target().get_size() == 32)
86f2e683
ILT
1857 {
1858#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1859 return this->do_define_in_output_data<32>(name, version, defined, od,
2ea97941 1860 value, symsize, type, binding,
86f2e683 1861 visibility, nonvis,
2ea97941 1862 offset_is_from_end,
86f2e683
ILT
1863 only_if_ref);
1864#else
1865 gold_unreachable();
1866#endif
1867 }
8851ecca 1868 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1869 {
1870#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1871 return this->do_define_in_output_data<64>(name, version, defined, od,
2ea97941 1872 value, symsize, type, binding,
86f2e683 1873 visibility, nonvis,
2ea97941 1874 offset_is_from_end,
86f2e683
ILT
1875 only_if_ref);
1876#else
1877 gold_unreachable();
1878#endif
1879 }
ead1e424 1880 else
a3ad94ed 1881 gold_unreachable();
ead1e424
ILT
1882}
1883
1884// Define a symbol in an Output_data, sized version.
1885
1886template<int size>
14b31740 1887Sized_symbol<size>*
ead1e424 1888Symbol_table::do_define_in_output_data(
2ea97941
ILT
1889 const char* name,
1890 const char* version,
99fff23b 1891 Defined defined,
ead1e424 1892 Output_data* od,
2ea97941
ILT
1893 typename elfcpp::Elf_types<size>::Elf_Addr value,
1894 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1895 elfcpp::STT type,
1896 elfcpp::STB binding,
1897 elfcpp::STV visibility,
1898 unsigned char nonvis,
2ea97941 1899 bool offset_is_from_end,
ead1e424
ILT
1900 bool only_if_ref)
1901{
1902 Sized_symbol<size>* sym;
86f2e683 1903 Sized_symbol<size>* oldsym;
8c500701 1904 bool resolve_oldsym;
ead1e424 1905
8851ecca 1906 if (parameters->target().is_big_endian())
193a53d9
ILT
1907 {
1908#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 1909 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
1910 only_if_ref, &oldsym,
1911 &resolve_oldsym);
193a53d9
ILT
1912#else
1913 gold_unreachable();
1914#endif
1915 }
ead1e424 1916 else
193a53d9
ILT
1917 {
1918#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 1919 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
1920 only_if_ref, &oldsym,
1921 &resolve_oldsym);
193a53d9
ILT
1922#else
1923 gold_unreachable();
1924#endif
1925 }
ead1e424
ILT
1926
1927 if (sym == NULL)
14b31740 1928 return NULL;
ead1e424 1929
2ea97941 1930 sym->init_output_data(name, version, od, value, symsize, type, binding,
5146f448
CC
1931 visibility, nonvis, offset_is_from_end,
1932 defined == PREDEFINED);
14b31740 1933
e5756efb 1934 if (oldsym == NULL)
55a93433
ILT
1935 {
1936 if (binding == elfcpp::STB_LOCAL
2ea97941 1937 || this->version_script_.symbol_is_local(name))
55a93433 1938 this->force_local(sym);
2ea97941 1939 else if (version != NULL)
75517b77 1940 sym->set_is_default();
55a93433
ILT
1941 return sym;
1942 }
86f2e683 1943
62855347 1944 if (Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 1945 this->override_with_special(oldsym, sym);
8c500701
ILT
1946
1947 if (resolve_oldsym)
1948 return sym;
1949 else
1950 {
1951 delete sym;
1952 return oldsym;
1953 }
ead1e424
ILT
1954}
1955
1956// Define a symbol based on an Output_segment.
1957
14b31740 1958Symbol*
2ea97941 1959Symbol_table::define_in_output_segment(const char* name,
99fff23b
ILT
1960 const char* version,
1961 Defined defined,
1962 Output_segment* os,
2ea97941
ILT
1963 uint64_t value,
1964 uint64_t symsize,
9b07f471
ILT
1965 elfcpp::STT type,
1966 elfcpp::STB binding,
ead1e424
ILT
1967 elfcpp::STV visibility,
1968 unsigned char nonvis,
2ea97941 1969 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1970 bool only_if_ref)
1971{
8851ecca 1972 if (parameters->target().get_size() == 32)
86f2e683
ILT
1973 {
1974#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1975 return this->do_define_in_output_segment<32>(name, version, defined, os,
2ea97941 1976 value, symsize, type,
86f2e683 1977 binding, visibility, nonvis,
2ea97941 1978 offset_base, only_if_ref);
86f2e683
ILT
1979#else
1980 gold_unreachable();
1981#endif
1982 }
8851ecca 1983 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1984 {
1985#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1986 return this->do_define_in_output_segment<64>(name, version, defined, os,
2ea97941 1987 value, symsize, type,
86f2e683 1988 binding, visibility, nonvis,
2ea97941 1989 offset_base, only_if_ref);
86f2e683
ILT
1990#else
1991 gold_unreachable();
1992#endif
1993 }
ead1e424 1994 else
a3ad94ed 1995 gold_unreachable();
ead1e424
ILT
1996}
1997
1998// Define a symbol in an Output_segment, sized version.
1999
2000template<int size>
14b31740 2001Sized_symbol<size>*
ead1e424 2002Symbol_table::do_define_in_output_segment(
2ea97941
ILT
2003 const char* name,
2004 const char* version,
99fff23b 2005 Defined defined,
ead1e424 2006 Output_segment* os,
2ea97941
ILT
2007 typename elfcpp::Elf_types<size>::Elf_Addr value,
2008 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
2009 elfcpp::STT type,
2010 elfcpp::STB binding,
2011 elfcpp::STV visibility,
2012 unsigned char nonvis,
2ea97941 2013 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
2014 bool only_if_ref)
2015{
2016 Sized_symbol<size>* sym;
86f2e683 2017 Sized_symbol<size>* oldsym;
8c500701 2018 bool resolve_oldsym;
ead1e424 2019
8851ecca 2020 if (parameters->target().is_big_endian())
9025d29d
ILT
2021 {
2022#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 2023 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
2024 only_if_ref, &oldsym,
2025 &resolve_oldsym);
9025d29d
ILT
2026#else
2027 gold_unreachable();
2028#endif
2029 }
ead1e424 2030 else
9025d29d
ILT
2031 {
2032#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 2033 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
2034 only_if_ref, &oldsym,
2035 &resolve_oldsym);
9025d29d
ILT
2036#else
2037 gold_unreachable();
2038#endif
2039 }
ead1e424
ILT
2040
2041 if (sym == NULL)
14b31740 2042 return NULL;
ead1e424 2043
2ea97941 2044 sym->init_output_segment(name, version, os, value, symsize, type, binding,
5146f448
CC
2045 visibility, nonvis, offset_base,
2046 defined == PREDEFINED);
14b31740 2047
e5756efb 2048 if (oldsym == NULL)
55a93433
ILT
2049 {
2050 if (binding == elfcpp::STB_LOCAL
2ea97941 2051 || this->version_script_.symbol_is_local(name))
55a93433 2052 this->force_local(sym);
2ea97941 2053 else if (version != NULL)
75517b77 2054 sym->set_is_default();
55a93433
ILT
2055 return sym;
2056 }
86f2e683 2057
62855347 2058 if (Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 2059 this->override_with_special(oldsym, sym);
8c500701
ILT
2060
2061 if (resolve_oldsym)
2062 return sym;
2063 else
2064 {
2065 delete sym;
2066 return oldsym;
2067 }
ead1e424
ILT
2068}
2069
2070// Define a special symbol with a constant value. It is a multiple
2071// definition error if this symbol is already defined.
2072
14b31740 2073Symbol*
2ea97941
ILT
2074Symbol_table::define_as_constant(const char* name,
2075 const char* version,
99fff23b 2076 Defined defined,
2ea97941
ILT
2077 uint64_t value,
2078 uint64_t symsize,
9b07f471
ILT
2079 elfcpp::STT type,
2080 elfcpp::STB binding,
2081 elfcpp::STV visibility,
2082 unsigned char nonvis,
caa9d5d9
ILT
2083 bool only_if_ref,
2084 bool force_override)
ead1e424 2085{
8851ecca 2086 if (parameters->target().get_size() == 32)
86f2e683
ILT
2087 {
2088#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 2089 return this->do_define_as_constant<32>(name, version, defined, value,
2ea97941 2090 symsize, type, binding,
caa9d5d9
ILT
2091 visibility, nonvis, only_if_ref,
2092 force_override);
86f2e683
ILT
2093#else
2094 gold_unreachable();
2095#endif
2096 }
8851ecca 2097 else if (parameters->target().get_size() == 64)
86f2e683
ILT
2098 {
2099#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 2100 return this->do_define_as_constant<64>(name, version, defined, value,
2ea97941 2101 symsize, type, binding,
caa9d5d9
ILT
2102 visibility, nonvis, only_if_ref,
2103 force_override);
86f2e683
ILT
2104#else
2105 gold_unreachable();
2106#endif
2107 }
ead1e424 2108 else
a3ad94ed 2109 gold_unreachable();
ead1e424
ILT
2110}
2111
2112// Define a symbol as a constant, sized version.
2113
2114template<int size>
14b31740 2115Sized_symbol<size>*
ead1e424 2116Symbol_table::do_define_as_constant(
2ea97941
ILT
2117 const char* name,
2118 const char* version,
99fff23b 2119 Defined defined,
2ea97941
ILT
2120 typename elfcpp::Elf_types<size>::Elf_Addr value,
2121 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
2122 elfcpp::STT type,
2123 elfcpp::STB binding,
2124 elfcpp::STV visibility,
2125 unsigned char nonvis,
caa9d5d9
ILT
2126 bool only_if_ref,
2127 bool force_override)
ead1e424
ILT
2128{
2129 Sized_symbol<size>* sym;
86f2e683 2130 Sized_symbol<size>* oldsym;
8c500701 2131 bool resolve_oldsym;
ead1e424 2132
8851ecca 2133 if (parameters->target().is_big_endian())
9025d29d
ILT
2134 {
2135#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 2136 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
2137 only_if_ref, &oldsym,
2138 &resolve_oldsym);
9025d29d
ILT
2139#else
2140 gold_unreachable();
2141#endif
2142 }
ead1e424 2143 else
9025d29d
ILT
2144 {
2145#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 2146 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
2147 only_if_ref, &oldsym,
2148 &resolve_oldsym);
9025d29d
ILT
2149#else
2150 gold_unreachable();
2151#endif
2152 }
ead1e424
ILT
2153
2154 if (sym == NULL)
14b31740 2155 return NULL;
ead1e424 2156
2ea97941 2157 sym->init_constant(name, version, value, symsize, type, binding, visibility,
5146f448 2158 nonvis, defined == PREDEFINED);
14b31740 2159
e5756efb 2160 if (oldsym == NULL)
55a93433 2161 {
686c8caf
ILT
2162 // Version symbols are absolute symbols with name == version.
2163 // We don't want to force them to be local.
2ea97941
ILT
2164 if ((version == NULL
2165 || name != version
2166 || value != 0)
686c8caf 2167 && (binding == elfcpp::STB_LOCAL
2ea97941 2168 || this->version_script_.symbol_is_local(name)))
55a93433 2169 this->force_local(sym);
2ea97941
ILT
2170 else if (version != NULL
2171 && (name != version || value != 0))
75517b77 2172 sym->set_is_default();
55a93433
ILT
2173 return sym;
2174 }
86f2e683 2175
99fff23b 2176 if (force_override
62855347 2177 || Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 2178 this->override_with_special(oldsym, sym);
8c500701
ILT
2179
2180 if (resolve_oldsym)
2181 return sym;
2182 else
2183 {
2184 delete sym;
2185 return oldsym;
2186 }
ead1e424
ILT
2187}
2188
2189// Define a set of symbols in output sections.
2190
2191void
9b07f471 2192Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2193 const Define_symbol_in_section* p,
2194 bool only_if_ref)
ead1e424
ILT
2195{
2196 for (int i = 0; i < count; ++i, ++p)
2197 {
2198 Output_section* os = layout->find_output_section(p->output_section);
2199 if (os != NULL)
99fff23b 2200 this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2201 p->size, p->type, p->binding,
2202 p->visibility, p->nonvis,
a445fddf
ILT
2203 p->offset_is_from_end,
2204 only_if_ref || p->only_if_ref);
ead1e424 2205 else
99fff23b
ILT
2206 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2207 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2208 only_if_ref || p->only_if_ref,
2209 false);
ead1e424
ILT
2210 }
2211}
2212
2213// Define a set of symbols in output segments.
2214
2215void
9b07f471 2216Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2217 const Define_symbol_in_segment* p,
2218 bool only_if_ref)
ead1e424
ILT
2219{
2220 for (int i = 0; i < count; ++i, ++p)
2221 {
2222 Output_segment* os = layout->find_output_segment(p->segment_type,
2223 p->segment_flags_set,
2224 p->segment_flags_clear);
2225 if (os != NULL)
99fff23b 2226 this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2227 p->size, p->type, p->binding,
2228 p->visibility, p->nonvis,
a445fddf
ILT
2229 p->offset_base,
2230 only_if_ref || p->only_if_ref);
ead1e424 2231 else
99fff23b
ILT
2232 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2233 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2234 only_if_ref || p->only_if_ref,
2235 false);
ead1e424
ILT
2236 }
2237}
2238
46fe1623
ILT
2239// Define CSYM using a COPY reloc. POSD is the Output_data where the
2240// symbol should be defined--typically a .dyn.bss section. VALUE is
2241// the offset within POSD.
2242
2243template<int size>
2244void
fe8718a4 2245Symbol_table::define_with_copy_reloc(
fe8718a4
ILT
2246 Sized_symbol<size>* csym,
2247 Output_data* posd,
2ea97941 2248 typename elfcpp::Elf_types<size>::Elf_Addr value)
46fe1623
ILT
2249{
2250 gold_assert(csym->is_from_dynobj());
2251 gold_assert(!csym->is_copied_from_dynobj());
2ea97941
ILT
2252 Object* object = csym->object();
2253 gold_assert(object->is_dynamic());
2254 Dynobj* dynobj = static_cast<Dynobj*>(object);
46fe1623
ILT
2255
2256 // Our copied variable has to override any variable in a shared
2257 // library.
2258 elfcpp::STB binding = csym->binding();
2259 if (binding == elfcpp::STB_WEAK)
2260 binding = elfcpp::STB_GLOBAL;
2261
99fff23b 2262 this->define_in_output_data(csym->name(), csym->version(), COPY,
2ea97941 2263 posd, value, csym->symsize(),
46fe1623
ILT
2264 csym->type(), binding,
2265 csym->visibility(), csym->nonvis(),
2266 false, false);
2267
2268 csym->set_is_copied_from_dynobj();
2269 csym->set_needs_dynsym_entry();
2270
2271 this->copied_symbol_dynobjs_[csym] = dynobj;
2272
2273 // We have now defined all aliases, but we have not entered them all
2274 // in the copied_symbol_dynobjs_ map.
2275 if (csym->has_alias())
2276 {
2277 Symbol* sym = csym;
2278 while (true)
2279 {
2280 sym = this->weak_aliases_[sym];
2281 if (sym == csym)
2282 break;
2283 gold_assert(sym->output_data() == posd);
2284
2285 sym->set_is_copied_from_dynobj();
2286 this->copied_symbol_dynobjs_[sym] = dynobj;
2287 }
2288 }
2289}
2290
2291// SYM is defined using a COPY reloc. Return the dynamic object where
2292// the original definition was found.
2293
2294Dynobj*
2295Symbol_table::get_copy_source(const Symbol* sym) const
2296{
2297 gold_assert(sym->is_copied_from_dynobj());
2298 Copied_symbol_dynobjs::const_iterator p =
2299 this->copied_symbol_dynobjs_.find(sym);
2300 gold_assert(p != this->copied_symbol_dynobjs_.end());
2301 return p->second;
2302}
2303
f3e9c5c5
ILT
2304// Add any undefined symbols named on the command line.
2305
2306void
88a4108b 2307Symbol_table::add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5 2308{
88a4108b
ILT
2309 if (parameters->options().any_undefined()
2310 || layout->script_options()->any_unreferenced())
f3e9c5c5
ILT
2311 {
2312 if (parameters->target().get_size() == 32)
2313 {
5adf9721 2314#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
88a4108b 2315 this->do_add_undefined_symbols_from_command_line<32>(layout);
f3e9c5c5
ILT
2316#else
2317 gold_unreachable();
2318#endif
2319 }
2320 else if (parameters->target().get_size() == 64)
2321 {
2322#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
88a4108b 2323 this->do_add_undefined_symbols_from_command_line<64>(layout);
f3e9c5c5
ILT
2324#else
2325 gold_unreachable();
2326#endif
2327 }
2328 else
2329 gold_unreachable();
2330 }
2331}
2332
2333template<int size>
2334void
88a4108b 2335Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5
ILT
2336{
2337 for (options::String_set::const_iterator p =
2338 parameters->options().undefined_begin();
2339 p != parameters->options().undefined_end();
2340 ++p)
88a4108b 2341 this->add_undefined_symbol_from_command_line<size>(p->c_str());
f3e9c5c5 2342
31821be0
CC
2343 for (options::String_set::const_iterator p =
2344 parameters->options().export_dynamic_symbol_begin();
2345 p != parameters->options().export_dynamic_symbol_end();
2346 ++p)
2347 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2348
88a4108b
ILT
2349 for (Script_options::referenced_const_iterator p =
2350 layout->script_options()->referenced_begin();
2351 p != layout->script_options()->referenced_end();
2352 ++p)
2353 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2354}
2355
2356template<int size>
2357void
2358Symbol_table::add_undefined_symbol_from_command_line(const char* name)
2359{
2360 if (this->lookup(name) != NULL)
2361 return;
f3e9c5c5 2362
88a4108b 2363 const char* version = NULL;
f3e9c5c5 2364
88a4108b
ILT
2365 Sized_symbol<size>* sym;
2366 Sized_symbol<size>* oldsym;
2367 bool resolve_oldsym;
2368 if (parameters->target().is_big_endian())
2369 {
f3e9c5c5 2370#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
88a4108b
ILT
2371 sym = this->define_special_symbol<size, true>(&name, &version,
2372 false, &oldsym,
2373 &resolve_oldsym);
f3e9c5c5 2374#else
88a4108b 2375 gold_unreachable();
f3e9c5c5 2376#endif
88a4108b
ILT
2377 }
2378 else
2379 {
f3e9c5c5 2380#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
88a4108b
ILT
2381 sym = this->define_special_symbol<size, false>(&name, &version,
2382 false, &oldsym,
2383 &resolve_oldsym);
f3e9c5c5 2384#else
88a4108b 2385 gold_unreachable();
f3e9c5c5 2386#endif
88a4108b 2387 }
f3e9c5c5 2388
88a4108b 2389 gold_assert(oldsym == NULL);
f3e9c5c5 2390
88a4108b
ILT
2391 sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
2392 elfcpp::STV_DEFAULT, 0);
2393 ++this->saw_undefined_;
f3e9c5c5
ILT
2394}
2395
a3ad94ed
ILT
2396// Set the dynamic symbol indexes. INDEX is the index of the first
2397// global dynamic symbol. Pointers to the symbols are stored into the
2398// vector SYMS. The names are added to DYNPOOL. This returns an
2399// updated dynamic symbol index.
2400
2401unsigned int
9b07f471 2402Symbol_table::set_dynsym_indexes(unsigned int index,
a3ad94ed 2403 std::vector<Symbol*>* syms,
14b31740
ILT
2404 Stringpool* dynpool,
2405 Versions* versions)
a3ad94ed 2406{
32e2b61d
AM
2407 std::vector<Symbol*> as_needed_sym;
2408
98ff9231
CC
2409 // Allow a target to set dynsym indexes.
2410 if (parameters->target().has_custom_set_dynsym_indexes())
2411 {
2412 std::vector<Symbol*> dyn_symbols;
2413 for (Symbol_table_type::iterator p = this->table_.begin();
2414 p != this->table_.end();
2415 ++p)
2416 {
2417 Symbol* sym = p->second;
2418 if (!sym->should_add_dynsym_entry(this))
2419 sym->set_dynsym_index(-1U);
2420 else
2421 dyn_symbols.push_back(sym);
2422 }
2423
2424 return parameters->target().set_dynsym_indexes(&dyn_symbols, index, syms,
2425 dynpool, versions, this);
2426 }
2427
a3ad94ed
ILT
2428 for (Symbol_table_type::iterator p = this->table_.begin();
2429 p != this->table_.end();
2430 ++p)
2431 {
2432 Symbol* sym = p->second;
16649710
ILT
2433
2434 // Note that SYM may already have a dynamic symbol index, since
2435 // some symbols appear more than once in the symbol table, with
2436 // and without a version.
2437
ce97fa81 2438 if (!sym->should_add_dynsym_entry(this))
16649710
ILT
2439 sym->set_dynsym_index(-1U);
2440 else if (!sym->has_dynsym_index())
a3ad94ed
ILT
2441 {
2442 sym->set_dynsym_index(index);
2443 ++index;
2444 syms->push_back(sym);
cfd73a4e 2445 dynpool->add(sym->name(), false, NULL);
14b31740 2446
594c8e5e 2447 // If the symbol is defined in a dynamic object and is
32e2b61d
AM
2448 // referenced strongly in a regular object, then mark the
2449 // dynamic object as needed. This is used to implement
2450 // --as-needed.
2451 if (sym->is_from_dynobj()
2452 && sym->in_reg()
2453 && !sym->is_undef_binding_weak())
594c8e5e 2454 sym->object()->set_is_needed();
32e2b61d
AM
2455
2456 // Record any version information, except those from
2457 // as-needed libraries not seen to be needed. Note that the
2458 // is_needed state for such libraries can change in this loop.
2459 if (sym->version() != NULL)
2460 {
2461 if (!sym->is_from_dynobj()
2462 || !sym->object()->as_needed()
2463 || sym->object()->is_needed())
2464 versions->record_version(this, dynpool, sym);
2465 else
2466 as_needed_sym.push_back(sym);
2467 }
a3ad94ed
ILT
2468 }
2469 }
2470
32e2b61d
AM
2471 // Process version information for symbols from as-needed libraries.
2472 for (std::vector<Symbol*>::iterator p = as_needed_sym.begin();
2473 p != as_needed_sym.end();
2474 ++p)
2475 {
2476 Symbol* sym = *p;
2477
2478 if (sym->object()->is_needed())
2479 versions->record_version(this, dynpool, sym);
2480 else
2481 sym->clear_version();
2482 }
2483
14b31740
ILT
2484 // Finish up the versions. In some cases this may add new dynamic
2485 // symbols.
9b07f471 2486 index = versions->finalize(this, index, syms);
14b31740 2487
a3ad94ed
ILT
2488 return index;
2489}
2490
c06b7b0b 2491// Set the final values for all the symbols. The index of the first
55a93433
ILT
2492// global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
2493// file offset OFF. Add their names to POOL. Return the new file
2494// offset. Update *PLOCAL_SYMCOUNT if necessary.
54dc6425 2495
75f65a3e 2496off_t
55a93433
ILT
2497Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
2498 size_t dyncount, Stringpool* pool,
ca09d69a 2499 unsigned int* plocal_symcount)
54dc6425 2500{
f6ce93d6
ILT
2501 off_t ret;
2502
55a93433
ILT
2503 gold_assert(*plocal_symcount != 0);
2504 this->first_global_index_ = *plocal_symcount;
c06b7b0b 2505
16649710
ILT
2506 this->dynamic_offset_ = dynoff;
2507 this->first_dynamic_global_index_ = dyn_global_index;
2508 this->dynamic_count_ = dyncount;
2509
8851ecca 2510 if (parameters->target().get_size() == 32)
9025d29d
ILT
2511 {
2512#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
55a93433 2513 ret = this->sized_finalize<32>(off, pool, plocal_symcount);
9025d29d
ILT
2514#else
2515 gold_unreachable();
2516#endif
2517 }
8851ecca 2518 else if (parameters->target().get_size() == 64)
9025d29d
ILT
2519 {
2520#if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
55a93433 2521 ret = this->sized_finalize<64>(off, pool, plocal_symcount);
9025d29d
ILT
2522#else
2523 gold_unreachable();
2524#endif
2525 }
61ba1cf9 2526 else
a3ad94ed 2527 gold_unreachable();
f6ce93d6
ILT
2528
2529 // Now that we have the final symbol table, we can reliably note
2530 // which symbols should get warnings.
cb295612 2531 this->warnings_.note_warnings(this);
f6ce93d6
ILT
2532
2533 return ret;
75f65a3e
ILT
2534}
2535
55a93433
ILT
2536// SYM is going into the symbol table at *PINDEX. Add the name to
2537// POOL, update *PINDEX and *POFF.
2538
2539template<int size>
2540void
2541Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool,
2542 unsigned int* pindex, off_t* poff)
2543{
2544 sym->set_symtab_index(*pindex);
6d1c4efb
ILT
2545 if (sym->version() == NULL || !parameters->options().relocatable())
2546 pool->add(sym->name(), false, NULL);
2547 else
2548 pool->add(sym->versioned_name(), true, NULL);
55a93433
ILT
2549 ++*pindex;
2550 *poff += elfcpp::Elf_sizes<size>::sym_size;
2551}
2552
ead1e424
ILT
2553// Set the final value for all the symbols. This is called after
2554// Layout::finalize, so all the output sections have their final
2555// address.
75f65a3e
ILT
2556
2557template<int size>
2558off_t
55a93433
ILT
2559Symbol_table::sized_finalize(off_t off, Stringpool* pool,
2560 unsigned int* plocal_symcount)
75f65a3e 2561{
ead1e424 2562 off = align_address(off, size >> 3);
75f65a3e
ILT
2563 this->offset_ = off;
2564
55a93433
ILT
2565 unsigned int index = *plocal_symcount;
2566 const unsigned int orig_index = index;
c06b7b0b 2567
55a93433
ILT
2568 // First do all the symbols which have been forced to be local, as
2569 // they must appear before all global symbols.
2570 for (Forced_locals::iterator p = this->forced_locals_.begin();
2571 p != this->forced_locals_.end();
2572 ++p)
2573 {
2574 Symbol* sym = *p;
2575 gold_assert(sym->is_forced_local());
2576 if (this->sized_finalize_symbol<size>(sym))
2577 {
2578 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2579 ++*plocal_symcount;
2580 }
2581 }
2582
2583 // Now do all the remaining symbols.
c06b7b0b
ILT
2584 for (Symbol_table_type::iterator p = this->table_.begin();
2585 p != this->table_.end();
2586 ++p)
54dc6425 2587 {
55a93433
ILT
2588 Symbol* sym = p->second;
2589 if (this->sized_finalize_symbol<size>(sym))
2590 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2591 }
54dc6425 2592
55a93433 2593 this->output_count_ = index - orig_index;
a3ad94ed 2594
55a93433
ILT
2595 return off;
2596}
75f65a3e 2597
c0a62865
DK
2598// Compute the final value of SYM and store status in location PSTATUS.
2599// During relaxation, this may be called multiple times for a symbol to
2600// compute its would-be final value in each relaxation pass.
008db82e 2601
55a93433 2602template<int size>
c0a62865
DK
2603typename Sized_symbol<size>::Value_type
2604Symbol_table::compute_final_value(
2605 const Sized_symbol<size>* sym,
2606 Compute_final_value_status* pstatus) const
55a93433 2607{
ef9beddf 2608 typedef typename Sized_symbol<size>::Value_type Value_type;
2ea97941 2609 Value_type value;
ead1e424 2610
55a93433
ILT
2611 switch (sym->source())
2612 {
2613 case Symbol::FROM_OBJECT:
2614 {
d491d34e 2615 bool is_ordinary;
2ea97941 2616 unsigned int shndx = sym->shndx(&is_ordinary);
ead1e424 2617
d491d34e 2618 if (!is_ordinary
2ea97941
ILT
2619 && shndx != elfcpp::SHN_ABS
2620 && !Symbol::is_common_shndx(shndx))
55a93433 2621 {
c0a62865
DK
2622 *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION;
2623 return 0;
ead1e424 2624 }
ead1e424 2625
55a93433
ILT
2626 Object* symobj = sym->object();
2627 if (symobj->is_dynamic())
ead1e424 2628 {
2ea97941
ILT
2629 value = 0;
2630 shndx = elfcpp::SHN_UNDEF;
ead1e424 2631 }
89fc3421
CC
2632 else if (symobj->pluginobj() != NULL)
2633 {
2ea97941
ILT
2634 value = 0;
2635 shndx = elfcpp::SHN_UNDEF;
89fc3421 2636 }
2ea97941
ILT
2637 else if (shndx == elfcpp::SHN_UNDEF)
2638 value = 0;
d491d34e 2639 else if (!is_ordinary
2ea97941
ILT
2640 && (shndx == elfcpp::SHN_ABS
2641 || Symbol::is_common_shndx(shndx)))
2642 value = sym->value();
55a93433 2643 else
ead1e424 2644 {
55a93433 2645 Relobj* relobj = static_cast<Relobj*>(symobj);
2ea97941 2646 Output_section* os = relobj->output_section(shndx);
55a93433 2647
2ea97941 2648 if (this->is_section_folded(relobj, shndx))
ef15dade
ST
2649 {
2650 gold_assert(os == NULL);
2651 // Get the os of the section it is folded onto.
2652 Section_id folded = this->icf_->get_folded_section(relobj,
2ea97941 2653 shndx);
ef15dade
ST
2654 gold_assert(folded.first != NULL);
2655 Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first);
d6344fb5
DK
2656 unsigned folded_shndx = folded.second;
2657
2658 os = folded_obj->output_section(folded_shndx);
ef15dade 2659 gold_assert(os != NULL);
d6344fb5
DK
2660
2661 // Replace (relobj, shndx) with canonical ICF input section.
2662 shndx = folded_shndx;
2663 relobj = folded_obj;
ef15dade
ST
2664 }
2665
d6344fb5 2666 uint64_t secoff64 = relobj->output_section_offset(shndx);
ef15dade 2667 if (os == NULL)
ead1e424 2668 {
6d03d481
ST
2669 bool static_or_reloc = (parameters->doing_static_link() ||
2670 parameters->options().relocatable());
2671 gold_assert(static_or_reloc || sym->dynsym_index() == -1U);
2672
c0a62865
DK
2673 *pstatus = CFVS_NO_OUTPUT_SECTION;
2674 return 0;
ead1e424 2675 }
55a93433 2676
eff45813
CC
2677 if (secoff64 == -1ULL)
2678 {
2679 // The section needs special handling (e.g., a merge section).
ef15dade 2680
2ea97941 2681 value = os->output_address(relobj, shndx, sym->value());
eff45813
CC
2682 }
2683 else
2684 {
2685 Value_type secoff =
2686 convert_types<Value_type, uint64_t>(secoff64);
2687 if (sym->type() == elfcpp::STT_TLS)
2ea97941 2688 value = sym->value() + os->tls_offset() + secoff;
eff45813 2689 else
2ea97941 2690 value = sym->value() + os->address() + secoff;
eff45813 2691 }
ead1e424 2692 }
55a93433
ILT
2693 }
2694 break;
2695
2696 case Symbol::IN_OUTPUT_DATA:
2697 {
2698 Output_data* od = sym->output_data();
2ea97941 2699 value = sym->value();
155a0dd7 2700 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2701 value += od->address();
155a0dd7
ILT
2702 else
2703 {
2704 Output_section* os = od->output_section();
2705 gold_assert(os != NULL);
2ea97941 2706 value += os->tls_offset() + (od->address() - os->address());
155a0dd7 2707 }
55a93433 2708 if (sym->offset_is_from_end())
2ea97941 2709 value += od->data_size();
55a93433
ILT
2710 }
2711 break;
2712
2713 case Symbol::IN_OUTPUT_SEGMENT:
2714 {
2715 Output_segment* os = sym->output_segment();
2ea97941 2716 value = sym->value();
edfbb029 2717 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2718 value += os->vaddr();
55a93433
ILT
2719 switch (sym->offset_base())
2720 {
2721 case Symbol::SEGMENT_START:
2722 break;
2723 case Symbol::SEGMENT_END:
2ea97941 2724 value += os->memsz();
55a93433
ILT
2725 break;
2726 case Symbol::SEGMENT_BSS:
2ea97941 2727 value += os->filesz();
55a93433
ILT
2728 break;
2729 default:
2730 gold_unreachable();
2731 }
2732 }
2733 break;
ead1e424 2734
f3e9c5c5 2735 case Symbol::IS_CONSTANT:
2ea97941 2736 value = sym->value();
55a93433 2737 break;
ead1e424 2738
f3e9c5c5 2739 case Symbol::IS_UNDEFINED:
2ea97941 2740 value = 0;
f3e9c5c5
ILT
2741 break;
2742
55a93433
ILT
2743 default:
2744 gold_unreachable();
2745 }
ead1e424 2746
c0a62865 2747 *pstatus = CFVS_OK;
2ea97941 2748 return value;
c0a62865
DK
2749}
2750
2751// Finalize the symbol SYM. This returns true if the symbol should be
2752// added to the symbol table, false otherwise.
2753
2754template<int size>
2755bool
2756Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
2757{
2758 typedef typename Sized_symbol<size>::Value_type Value_type;
2759
2760 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
2761
2762 // The default version of a symbol may appear twice in the symbol
2763 // table. We only need to finalize it once.
2764 if (sym->has_symtab_index())
2765 return false;
2766
2767 if (!sym->in_reg())
2768 {
2769 gold_assert(!sym->has_symtab_index());
2770 sym->set_symtab_index(-1U);
2771 gold_assert(sym->dynsym_index() == -1U);
2772 return false;
2773 }
2774
badc8139
RÁE
2775 // If the symbol is only present on plugin files, the plugin decided we
2776 // don't need it.
2777 if (!sym->in_real_elf())
2778 {
2779 gold_assert(!sym->has_symtab_index());
2780 sym->set_symtab_index(-1U);
2781 return false;
2782 }
2783
c0a62865
DK
2784 // Compute final symbol value.
2785 Compute_final_value_status status;
2ea97941 2786 Value_type value = this->compute_final_value(sym, &status);
c0a62865
DK
2787
2788 switch (status)
2789 {
2790 case CFVS_OK:
2791 break;
2792 case CFVS_UNSUPPORTED_SYMBOL_SECTION:
2793 {
2794 bool is_ordinary;
2ea97941 2795 unsigned int shndx = sym->shndx(&is_ordinary);
c0a62865 2796 gold_error(_("%s: unsupported symbol section 0x%x"),
2ea97941 2797 sym->demangled_name().c_str(), shndx);
c0a62865
DK
2798 }
2799 break;
2800 case CFVS_NO_OUTPUT_SECTION:
2801 sym->set_symtab_index(-1U);
2802 return false;
2803 default:
2804 gold_unreachable();
2805 }
2806
2ea97941 2807 sym->set_value(value);
9e2dcb77 2808
8c604651
CS
2809 if (parameters->options().strip_all()
2810 || !parameters->options().should_retain_symbol(sym->name()))
55a93433
ILT
2811 {
2812 sym->set_symtab_index(-1U);
2813 return false;
54dc6425 2814 }
75f65a3e 2815
55a93433 2816 return true;
54dc6425
ILT
2817}
2818
61ba1cf9
ILT
2819// Write out the global symbols.
2820
2821void
fd9d194f 2822Symbol_table::write_globals(const Stringpool* sympool,
d491d34e
ILT
2823 const Stringpool* dynpool,
2824 Output_symtab_xindex* symtab_xindex,
2825 Output_symtab_xindex* dynsym_xindex,
2826 Output_file* of) const
61ba1cf9 2827{
8851ecca 2828 switch (parameters->size_and_endianness())
61ba1cf9 2829 {
9025d29d 2830#ifdef HAVE_TARGET_32_LITTLE
8851ecca 2831 case Parameters::TARGET_32_LITTLE:
fd9d194f 2832 this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex,
d491d34e 2833 dynsym_xindex, of);
8851ecca 2834 break;
9025d29d 2835#endif
8851ecca
ILT
2836#ifdef HAVE_TARGET_32_BIG
2837 case Parameters::TARGET_32_BIG:
fd9d194f 2838 this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex,
d491d34e 2839 dynsym_xindex, of);
8851ecca 2840 break;
9025d29d 2841#endif
9025d29d 2842#ifdef HAVE_TARGET_64_LITTLE
8851ecca 2843 case Parameters::TARGET_64_LITTLE:
fd9d194f 2844 this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex,
d491d34e 2845 dynsym_xindex, of);
8851ecca 2846 break;
9025d29d 2847#endif
8851ecca
ILT
2848#ifdef HAVE_TARGET_64_BIG
2849 case Parameters::TARGET_64_BIG:
fd9d194f 2850 this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex,
d491d34e 2851 dynsym_xindex, of);
8851ecca
ILT
2852 break;
2853#endif
2854 default:
2855 gold_unreachable();
61ba1cf9 2856 }
61ba1cf9
ILT
2857}
2858
2859// Write out the global symbols.
2860
2861template<int size, bool big_endian>
2862void
fd9d194f 2863Symbol_table::sized_write_globals(const Stringpool* sympool,
16649710 2864 const Stringpool* dynpool,
d491d34e
ILT
2865 Output_symtab_xindex* symtab_xindex,
2866 Output_symtab_xindex* dynsym_xindex,
61ba1cf9
ILT
2867 Output_file* of) const
2868{
8851ecca 2869 const Target& target = parameters->target();
9a2d6984 2870
61ba1cf9 2871 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
55a93433
ILT
2872
2873 const unsigned int output_count = this->output_count_;
2874 const section_size_type oview_size = output_count * sym_size;
2875 const unsigned int first_global_index = this->first_global_index_;
5fe2a0f5
ILT
2876 unsigned char* psyms;
2877 if (this->offset_ == 0 || output_count == 0)
2878 psyms = NULL;
2879 else
2880 psyms = of->get_output_view(this->offset_, oview_size);
16649710 2881
55a93433
ILT
2882 const unsigned int dynamic_count = this->dynamic_count_;
2883 const section_size_type dynamic_size = dynamic_count * sym_size;
2884 const unsigned int first_dynamic_global_index =
2885 this->first_dynamic_global_index_;
16649710 2886 unsigned char* dynamic_view;
5fe2a0f5 2887 if (this->dynamic_offset_ == 0 || dynamic_count == 0)
16649710
ILT
2888 dynamic_view = NULL;
2889 else
2890 dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
c06b7b0b 2891
61ba1cf9
ILT
2892 for (Symbol_table_type::const_iterator p = this->table_.begin();
2893 p != this->table_.end();
2894 ++p)
2895 {
2896 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
2897
9a2d6984 2898 // Possibly warn about unresolved symbols in shared libraries.
fd9d194f 2899 this->warn_about_undefined_dynobj_symbol(sym);
e2827e5f 2900
a3ad94ed 2901 unsigned int sym_index = sym->symtab_index();
16649710
ILT
2902 unsigned int dynsym_index;
2903 if (dynamic_view == NULL)
2904 dynsym_index = -1U;
2905 else
2906 dynsym_index = sym->dynsym_index();
2907
2908 if (sym_index == -1U && dynsym_index == -1U)
a3ad94ed
ILT
2909 {
2910 // This symbol is not included in the output file.
2911 continue;
2912 }
16649710 2913
2ea97941 2914 unsigned int shndx;
88dd47ac
ILT
2915 typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
2916 typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
ce279a62 2917 elfcpp::STB binding = sym->binding();
9634ed06
CC
2918
2919 // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL.
2920 if (binding == elfcpp::STB_GNU_UNIQUE
2921 && !parameters->options().gnu_unique())
2922 binding = elfcpp::STB_GLOBAL;
2923
ead1e424
ILT
2924 switch (sym->source())
2925 {
2926 case Symbol::FROM_OBJECT:
2927 {
d491d34e
ILT
2928 bool is_ordinary;
2929 unsigned int in_shndx = sym->shndx(&is_ordinary);
ead1e424 2930
d491d34e 2931 if (!is_ordinary
0dfbdef4 2932 && in_shndx != elfcpp::SHN_ABS
8a5e3e08 2933 && !Symbol::is_common_shndx(in_shndx))
ead1e424 2934 {
75f2446e 2935 gold_error(_("%s: unsupported symbol section 0x%x"),
a2b1aa12 2936 sym->demangled_name().c_str(), in_shndx);
2ea97941 2937 shndx = in_shndx;
f6ce93d6 2938 }
ead1e424
ILT
2939 else
2940 {
75f2446e
ILT
2941 Object* symobj = sym->object();
2942 if (symobj->is_dynamic())
2943 {
2944 if (sym->needs_dynsym_value())
8851ecca 2945 dynsym_value = target.dynsym_value(sym);
2ea97941 2946 shndx = elfcpp::SHN_UNDEF;
ce279a62
CC
2947 if (sym->is_undef_binding_weak())
2948 binding = elfcpp::STB_WEAK;
74f67560
DK
2949 else
2950 binding = elfcpp::STB_GLOBAL;
75f2446e 2951 }
89fc3421 2952 else if (symobj->pluginobj() != NULL)
2ea97941 2953 shndx = elfcpp::SHN_UNDEF;
75f2446e 2954 else if (in_shndx == elfcpp::SHN_UNDEF
d491d34e
ILT
2955 || (!is_ordinary
2956 && (in_shndx == elfcpp::SHN_ABS
8a5e3e08 2957 || Symbol::is_common_shndx(in_shndx))))
2ea97941 2958 shndx = in_shndx;
75f2446e
ILT
2959 else
2960 {
2961 Relobj* relobj = static_cast<Relobj*>(symobj);
ef9beddf 2962 Output_section* os = relobj->output_section(in_shndx);
ef15dade
ST
2963 if (this->is_section_folded(relobj, in_shndx))
2964 {
2965 // This global symbol must be written out even though
2966 // it is folded.
2967 // Get the os of the section it is folded onto.
2968 Section_id folded =
2969 this->icf_->get_folded_section(relobj, in_shndx);
2970 gold_assert(folded.first !=NULL);
2971 Relobj* folded_obj =
2972 reinterpret_cast<Relobj*>(folded.first);
2973 os = folded_obj->output_section(folded.second);
2974 gold_assert(os != NULL);
2975 }
75f2446e 2976 gold_assert(os != NULL);
2ea97941 2977 shndx = os->out_shndx();
88dd47ac 2978
2ea97941 2979 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e
ILT
2980 {
2981 if (sym_index != -1U)
2ea97941 2982 symtab_xindex->add(sym_index, shndx);
d491d34e 2983 if (dynsym_index != -1U)
2ea97941
ILT
2984 dynsym_xindex->add(dynsym_index, shndx);
2985 shndx = elfcpp::SHN_XINDEX;
d491d34e
ILT
2986 }
2987
88dd47ac
ILT
2988 // In object files symbol values are section
2989 // relative.
8851ecca 2990 if (parameters->options().relocatable())
88dd47ac 2991 sym_value -= os->address();
75f2446e 2992 }
ead1e424
ILT
2993 }
2994 }
2995 break;
2996
2997 case Symbol::IN_OUTPUT_DATA:
502e8a84
CC
2998 {
2999 Output_data* od = sym->output_data();
3000
3001 shndx = od->out_shndx();
3002 if (shndx >= elfcpp::SHN_LORESERVE)
3003 {
3004 if (sym_index != -1U)
3005 symtab_xindex->add(sym_index, shndx);
3006 if (dynsym_index != -1U)
3007 dynsym_xindex->add(dynsym_index, shndx);
3008 shndx = elfcpp::SHN_XINDEX;
3009 }
3010
3011 // In object files symbol values are section
3012 // relative.
3013 if (parameters->options().relocatable())
3014 sym_value -= od->address();
3015 }
ead1e424
ILT
3016 break;
3017
3018 case Symbol::IN_OUTPUT_SEGMENT:
2ea97941 3019 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
3020 break;
3021
f3e9c5c5 3022 case Symbol::IS_CONSTANT:
2ea97941 3023 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
3024 break;
3025
f3e9c5c5 3026 case Symbol::IS_UNDEFINED:
2ea97941 3027 shndx = elfcpp::SHN_UNDEF;
f3e9c5c5
ILT
3028 break;
3029
ead1e424 3030 default:
a3ad94ed 3031 gold_unreachable();
ead1e424 3032 }
61ba1cf9 3033
16649710
ILT
3034 if (sym_index != -1U)
3035 {
55a93433
ILT
3036 sym_index -= first_global_index;
3037 gold_assert(sym_index < output_count);
3038 unsigned char* ps = psyms + (sym_index * sym_size);
2ea97941 3039 this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
ce279a62 3040 binding, sympool, ps);
16649710 3041 }
61ba1cf9 3042
16649710
ILT
3043 if (dynsym_index != -1U)
3044 {
3045 dynsym_index -= first_dynamic_global_index;
3046 gold_assert(dynsym_index < dynamic_count);
3047 unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
2ea97941 3048 this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
ce279a62 3049 binding, dynpool, pd);
800d9823
CC
3050 // Allow a target to adjust dynamic symbol value.
3051 parameters->target().adjust_dyn_symbol(sym, pd);
16649710 3052 }
61ba1cf9
ILT
3053 }
3054
c06b7b0b 3055 of->write_output_view(this->offset_, oview_size, psyms);
16649710
ILT
3056 if (dynamic_view != NULL)
3057 of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
3058}
3059
3060// Write out the symbol SYM, in section SHNDX, to P. POOL is the
3061// strtab holding the name.
3062
3063template<int size, bool big_endian>
3064void
ab5c9e90
ILT
3065Symbol_table::sized_write_symbol(
3066 Sized_symbol<size>* sym,
2ea97941
ILT
3067 typename elfcpp::Elf_types<size>::Elf_Addr value,
3068 unsigned int shndx,
ce279a62 3069 elfcpp::STB binding,
ab5c9e90 3070 const Stringpool* pool,
7d1a9ebb 3071 unsigned char* p) const
16649710
ILT
3072{
3073 elfcpp::Sym_write<size, big_endian> osym(p);
6d1c4efb
ILT
3074 if (sym->version() == NULL || !parameters->options().relocatable())
3075 osym.put_st_name(pool->get_offset(sym->name()));
3076 else
3077 osym.put_st_name(pool->get_offset(sym->versioned_name()));
2ea97941 3078 osym.put_st_value(value);
58e54ac2 3079 // Use a symbol size of zero for undefined symbols from shared libraries.
2ea97941 3080 if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj())
58e54ac2
CD
3081 osym.put_st_size(0);
3082 else
3083 osym.put_st_size(sym->symsize());
53d7974c
L
3084 elfcpp::STT type = sym->type();
3085 // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
3086 if (type == elfcpp::STT_GNU_IFUNC
3087 && sym->is_from_dynobj())
3088 type = elfcpp::STT_FUNC;
55a93433
ILT
3089 // A version script may have overridden the default binding.
3090 if (sym->is_forced_local())
53d7974c 3091 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type));
55a93433 3092 else
ce279a62 3093 osym.put_st_info(elfcpp::elf_st_info(binding, type));
16649710 3094 osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
2ea97941 3095 osym.put_st_shndx(shndx);
61ba1cf9
ILT
3096}
3097
9a2d6984
ILT
3098// Check for unresolved symbols in shared libraries. This is
3099// controlled by the --allow-shlib-undefined option.
3100
3101// We only warn about libraries for which we have seen all the
3102// DT_NEEDED entries. We don't try to track down DT_NEEDED entries
3103// which were not seen in this link. If we didn't see a DT_NEEDED
3104// entry, we aren't going to be able to reliably report whether the
3105// symbol is undefined.
3106
fd9d194f
ILT
3107// We also don't warn about libraries found in a system library
3108// directory (e.g., /lib or /usr/lib); we assume that those libraries
3109// are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
3110// can have undefined references satisfied by ld-linux.so.
9a2d6984
ILT
3111
3112inline void
fd9d194f 3113Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const
9a2d6984 3114{
d491d34e 3115 bool dummy;
9a2d6984
ILT
3116 if (sym->source() == Symbol::FROM_OBJECT
3117 && sym->object()->is_dynamic()
d491d34e 3118 && sym->shndx(&dummy) == elfcpp::SHN_UNDEF
9a2d6984 3119 && sym->binding() != elfcpp::STB_WEAK
8851ecca
ILT
3120 && !parameters->options().allow_shlib_undefined()
3121 && !parameters->target().is_defined_by_abi(sym)
fd9d194f 3122 && !sym->object()->is_in_system_directory())
9a2d6984
ILT
3123 {
3124 // A very ugly cast.
3125 Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
3126 if (!dynobj->has_unknown_needed_entries())
f073bbf7 3127 gold_undefined_symbol(sym);
9a2d6984
ILT
3128 }
3129}
3130
a3ad94ed
ILT
3131// Write out a section symbol. Return the update offset.
3132
3133void
ca09d69a 3134Symbol_table::write_section_symbol(const Output_section* os,
d491d34e 3135 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3136 Output_file* of,
3137 off_t offset) const
3138{
8851ecca 3139 switch (parameters->size_and_endianness())
a3ad94ed 3140 {
9025d29d 3141#ifdef HAVE_TARGET_32_LITTLE
8851ecca 3142 case Parameters::TARGET_32_LITTLE:
d491d34e
ILT
3143 this->sized_write_section_symbol<32, false>(os, symtab_xindex, of,
3144 offset);
8851ecca 3145 break;
9025d29d 3146#endif
8851ecca
ILT
3147#ifdef HAVE_TARGET_32_BIG
3148 case Parameters::TARGET_32_BIG:
d491d34e
ILT
3149 this->sized_write_section_symbol<32, true>(os, symtab_xindex, of,
3150 offset);
8851ecca 3151 break;
9025d29d 3152#endif
9025d29d 3153#ifdef HAVE_TARGET_64_LITTLE
8851ecca 3154 case Parameters::TARGET_64_LITTLE:
d491d34e
ILT
3155 this->sized_write_section_symbol<64, false>(os, symtab_xindex, of,
3156 offset);
8851ecca 3157 break;
9025d29d 3158#endif
8851ecca
ILT
3159#ifdef HAVE_TARGET_64_BIG
3160 case Parameters::TARGET_64_BIG:
d491d34e
ILT
3161 this->sized_write_section_symbol<64, true>(os, symtab_xindex, of,
3162 offset);
8851ecca
ILT
3163 break;
3164#endif
3165 default:
3166 gold_unreachable();
a3ad94ed 3167 }
a3ad94ed
ILT
3168}
3169
3170// Write out a section symbol, specialized for size and endianness.
3171
3172template<int size, bool big_endian>
3173void
3174Symbol_table::sized_write_section_symbol(const Output_section* os,
d491d34e 3175 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3176 Output_file* of,
3177 off_t offset) const
3178{
3179 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
3180
3181 unsigned char* pov = of->get_output_view(offset, sym_size);
3182
3183 elfcpp::Sym_write<size, big_endian> osym(pov);
3184 osym.put_st_name(0);
b4ecf66b
ILT
3185 if (parameters->options().relocatable())
3186 osym.put_st_value(0);
3187 else
3188 osym.put_st_value(os->address());
a3ad94ed
ILT
3189 osym.put_st_size(0);
3190 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
3191 elfcpp::STT_SECTION));
3192 osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
d491d34e 3193
2ea97941
ILT
3194 unsigned int shndx = os->out_shndx();
3195 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e 3196 {
2ea97941
ILT
3197 symtab_xindex->add(os->symtab_index(), shndx);
3198 shndx = elfcpp::SHN_XINDEX;
d491d34e 3199 }
2ea97941 3200 osym.put_st_shndx(shndx);
a3ad94ed
ILT
3201
3202 of->write_output_view(offset, sym_size, pov);
3203}
3204
abaa3995
ILT
3205// Print statistical information to stderr. This is used for --stats.
3206
3207void
3208Symbol_table::print_stats() const
3209{
3210#if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
3211 fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"),
3212 program_name, this->table_.size(), this->table_.bucket_count());
3213#else
3214 fprintf(stderr, _("%s: symbol table entries: %zu\n"),
3215 program_name, this->table_.size());
3216#endif
ad8f37d1 3217 this->namepool_.print_stats("symbol table stringpool");
abaa3995
ILT
3218}
3219
ff541f30
ILT
3220// We check for ODR violations by looking for symbols with the same
3221// name for which the debugging information reports that they were
71ff8986 3222// defined in disjoint source locations. When comparing the source
55382fb7
ILT
3223// location, we consider instances with the same base filename to be
3224// the same. This is because different object files/shared libraries
3225// can include the same header file using different paths, and
3226// different optimization settings can make the line number appear to
3227// be a couple lines off, and we don't want to report an ODR violation
3228// in those cases.
ff541f30
ILT
3229
3230// This struct is used to compare line information, as returned by
7bf1f802 3231// Dwarf_line_info::one_addr2line. It implements a < comparison
71ff8986 3232// operator used with std::sort.
ff541f30
ILT
3233
3234struct Odr_violation_compare
3235{
3236 bool
3237 operator()(const std::string& s1, const std::string& s2) const
3238 {
55382fb7 3239 // Inputs should be of the form "dirname/filename:linenum" where
71ff8986 3240 // "dirname/" is optional. We want to compare just the filename:linenum.
55382fb7 3241
71ff8986 3242 // Find the last '/' in each string.
55382fb7
ILT
3243 std::string::size_type s1begin = s1.rfind('/');
3244 std::string::size_type s2begin = s2.rfind('/');
55382fb7
ILT
3245 // If there was no '/' in a string, start at the beginning.
3246 if (s1begin == std::string::npos)
3247 s1begin = 0;
3248 if (s2begin == std::string::npos)
3249 s2begin = 0;
71ff8986
ILT
3250 return s1.compare(s1begin, std::string::npos,
3251 s2, s2begin, std::string::npos) < 0;
ff541f30
ILT
3252 }
3253};
3254
71ff8986
ILT
3255// Returns all of the lines attached to LOC, not just the one the
3256// instruction actually came from.
3257std::vector<std::string>
3258Symbol_table::linenos_from_loc(const Task* task,
3259 const Symbol_location& loc)
3260{
3261 // We need to lock the object in order to read it. This
3262 // means that we have to run in a singleton Task. If we
3263 // want to run this in a general Task for better
3264 // performance, we will need one Task for object, plus
3265 // appropriate locking to ensure that we don't conflict with
3266 // other uses of the object. Also note, one_addr2line is not
3267 // currently thread-safe.
3268 Task_lock_obj<Object> tl(task, loc.object);
3269
3270 std::vector<std::string> result;
dc3714f3
AM
3271 Symbol_location code_loc = loc;
3272 parameters->target().function_location(&code_loc);
71ff8986
ILT
3273 // 16 is the size of the object-cache that one_addr2line should use.
3274 std::string canonical_result = Dwarf_line_info::one_addr2line(
dc3714f3 3275 code_loc.object, code_loc.shndx, code_loc.offset, 16, &result);
71ff8986
ILT
3276 if (!canonical_result.empty())
3277 result.push_back(canonical_result);
3278 return result;
3279}
3280
3281// OutputIterator that records if it was ever assigned to. This
3282// allows it to be used with std::set_intersection() to check for
3283// intersection rather than computing the intersection.
3284struct Check_intersection
3285{
3286 Check_intersection()
3287 : value_(false)
3288 {}
3289
3290 bool had_intersection() const
3291 { return this->value_; }
3292
3293 Check_intersection& operator++()
3294 { return *this; }
3295
3296 Check_intersection& operator*()
3297 { return *this; }
3298
3299 template<typename T>
3300 Check_intersection& operator=(const T&)
3301 {
3302 this->value_ = true;
3303 return *this;
3304 }
3305
3306 private:
3307 bool value_;
3308};
3309
70e654ba 3310// Check candidate_odr_violations_ to find symbols with the same name
71ff8986
ILT
3311// but apparently different definitions (different source-file/line-no
3312// for each line assigned to the first instruction).
70e654ba
ILT
3313
3314void
17a1d0a9
ILT
3315Symbol_table::detect_odr_violations(const Task* task,
3316 const char* output_file_name) const
70e654ba
ILT
3317{
3318 for (Odr_map::const_iterator it = candidate_odr_violations_.begin();
3319 it != candidate_odr_violations_.end();
3320 ++it)
3321 {
71ff8986
ILT
3322 const char* const symbol_name = it->first;
3323
3324 std::string first_object_name;
3325 std::vector<std::string> first_object_linenos;
3326
3327 Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3328 locs = it->second.begin();
3329 const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3330 locs_end = it->second.end();
3331 for (; locs != locs_end && first_object_linenos.empty(); ++locs)
70e654ba 3332 {
71ff8986
ILT
3333 // Save the line numbers from the first definition to
3334 // compare to the other definitions. Ideally, we'd compare
3335 // every definition to every other, but we don't want to
3336 // take O(N^2) time to do this. This shortcut may cause
3337 // false negatives that appear or disappear depending on the
3338 // link order, but it won't cause false positives.
3339 first_object_name = locs->object->name();
3340 first_object_linenos = this->linenos_from_loc(task, *locs);
70e654ba 3341 }
437ddf0c
CC
3342 if (first_object_linenos.empty())
3343 continue;
70e654ba 3344
71ff8986 3345 // Sort by Odr_violation_compare to make std::set_intersection work.
437ddf0c 3346 std::string first_object_canonical_result = first_object_linenos.back();
71ff8986
ILT
3347 std::sort(first_object_linenos.begin(), first_object_linenos.end(),
3348 Odr_violation_compare());
3349
3350 for (; locs != locs_end; ++locs)
70e654ba 3351 {
71ff8986
ILT
3352 std::vector<std::string> linenos =
3353 this->linenos_from_loc(task, *locs);
3354 // linenos will be empty if we couldn't parse the debug info.
3355 if (linenos.empty())
3356 continue;
3357 // Sort by Odr_violation_compare to make std::set_intersection work.
437ddf0c
CC
3358 gold_assert(!linenos.empty());
3359 std::string second_object_canonical_result = linenos.back();
71ff8986
ILT
3360 std::sort(linenos.begin(), linenos.end(), Odr_violation_compare());
3361
3362 Check_intersection intersection_result =
3363 std::set_intersection(first_object_linenos.begin(),
3364 first_object_linenos.end(),
3365 linenos.begin(),
3366 linenos.end(),
3367 Check_intersection(),
3368 Odr_violation_compare());
3369 if (!intersection_result.had_intersection())
3370 {
3371 gold_warning(_("while linking %s: symbol '%s' defined in "
3372 "multiple places (possible ODR violation):"),
3373 output_file_name, demangle(symbol_name).c_str());
3374 // This only prints one location from each definition,
3375 // which may not be the location we expect to intersect
3376 // with another definition. We could print the whole
3377 // set of locations, but that seems too verbose.
71ff8986 3378 fprintf(stderr, _(" %s from %s\n"),
437ddf0c 3379 first_object_canonical_result.c_str(),
71ff8986
ILT
3380 first_object_name.c_str());
3381 fprintf(stderr, _(" %s from %s\n"),
437ddf0c 3382 second_object_canonical_result.c_str(),
71ff8986
ILT
3383 locs->object->name().c_str());
3384 // Only print one broken pair, to avoid needing to
3385 // compare against a list of the disjoint definition
3386 // locations we've found so far. (If we kept comparing
3387 // against just the first one, we'd get a lot of
3388 // redundant complaints about the second definition
3389 // location.)
3390 break;
3391 }
70e654ba
ILT
3392 }
3393 }
e4e5049b
CS
3394 // We only call one_addr2line() in this function, so we can clear its cache.
3395 Dwarf_line_info::clear_addr2line_cache();
70e654ba
ILT
3396}
3397
f6ce93d6
ILT
3398// Warnings functions.
3399
3400// Add a new warning.
3401
3402void
2ea97941 3403Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
cb295612 3404 const std::string& warning)
f6ce93d6 3405{
2ea97941
ILT
3406 name = symtab->canonicalize_name(name);
3407 this->warnings_[name].set(obj, warning);
f6ce93d6
ILT
3408}
3409
3410// Look through the warnings and mark the symbols for which we should
3411// warn. This is called during Layout::finalize when we know the
3412// sources for all the symbols.
3413
3414void
cb295612 3415Warnings::note_warnings(Symbol_table* symtab)
f6ce93d6
ILT
3416{
3417 for (Warning_table::iterator p = this->warnings_.begin();
3418 p != this->warnings_.end();
3419 ++p)
3420 {
3421 Symbol* sym = symtab->lookup(p->first, NULL);
3422 if (sym != NULL
3423 && sym->source() == Symbol::FROM_OBJECT
3424 && sym->object() == p->second.object)
cb295612 3425 sym->set_has_warning();
f6ce93d6
ILT
3426 }
3427}
3428
3429// Issue a warning. This is called when we see a relocation against a
3430// symbol for which has a warning.
3431
75f2446e 3432template<int size, bool big_endian>
f6ce93d6 3433void
75f2446e
ILT
3434Warnings::issue_warning(const Symbol* sym,
3435 const Relocate_info<size, big_endian>* relinfo,
3436 size_t relnum, off_t reloffset) const
f6ce93d6 3437{
a3ad94ed 3438 gold_assert(sym->has_warning());
9d3b0698
ILT
3439
3440 // We don't want to issue a warning for a relocation against the
3441 // symbol in the same object file in which the symbol is defined.
3442 if (sym->object() == relinfo->object)
3443 return;
3444
f6ce93d6 3445 Warning_table::const_iterator p = this->warnings_.find(sym->name());
a3ad94ed 3446 gold_assert(p != this->warnings_.end());
75f2446e
ILT
3447 gold_warning_at_location(relinfo, relnum, reloffset,
3448 "%s", p->second.text.c_str());
f6ce93d6
ILT
3449}
3450
14bfc3f5
ILT
3451// Instantiate the templates we need. We could use the configure
3452// script to restrict this to only the ones needed for implemented
3453// targets.
3454
c7912668
ILT
3455#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3456template
3457void
3458Sized_symbol<32>::allocate_common(Output_data*, Value_type);
3459#endif
3460
3461#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3462template
3463void
3464Sized_symbol<64>::allocate_common(Output_data*, Value_type);
3465#endif
3466
193a53d9 3467#ifdef HAVE_TARGET_32_LITTLE
14bfc3f5
ILT
3468template
3469void
193a53d9 3470Symbol_table::add_from_relobj<32, false>(
6fa2a40b 3471 Sized_relobj_file<32, false>* relobj,
f6ce93d6 3472 const unsigned char* syms,
14bfc3f5 3473 size_t count,
d491d34e 3474 size_t symndx_offset,
14bfc3f5
ILT
3475 const char* sym_names,
3476 size_t sym_name_size,
6fa2a40b 3477 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3478 size_t* defined);
193a53d9 3479#endif
14bfc3f5 3480
193a53d9 3481#ifdef HAVE_TARGET_32_BIG
14bfc3f5
ILT
3482template
3483void
193a53d9 3484Symbol_table::add_from_relobj<32, true>(
6fa2a40b 3485 Sized_relobj_file<32, true>* relobj,
f6ce93d6 3486 const unsigned char* syms,
14bfc3f5 3487 size_t count,
d491d34e 3488 size_t symndx_offset,
14bfc3f5
ILT
3489 const char* sym_names,
3490 size_t sym_name_size,
6fa2a40b 3491 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3492 size_t* defined);
193a53d9 3493#endif
14bfc3f5 3494
193a53d9 3495#ifdef HAVE_TARGET_64_LITTLE
14bfc3f5
ILT
3496template
3497void
193a53d9 3498Symbol_table::add_from_relobj<64, false>(
6fa2a40b 3499 Sized_relobj_file<64, false>* relobj,
f6ce93d6 3500 const unsigned char* syms,
14bfc3f5 3501 size_t count,
d491d34e 3502 size_t symndx_offset,
14bfc3f5
ILT
3503 const char* sym_names,
3504 size_t sym_name_size,
6fa2a40b 3505 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3506 size_t* defined);
193a53d9 3507#endif
14bfc3f5 3508
193a53d9 3509#ifdef HAVE_TARGET_64_BIG
14bfc3f5
ILT
3510template
3511void
193a53d9 3512Symbol_table::add_from_relobj<64, true>(
6fa2a40b 3513 Sized_relobj_file<64, true>* relobj,
f6ce93d6 3514 const unsigned char* syms,
14bfc3f5 3515 size_t count,
d491d34e 3516 size_t symndx_offset,
14bfc3f5
ILT
3517 const char* sym_names,
3518 size_t sym_name_size,
6fa2a40b 3519 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3520 size_t* defined);
193a53d9 3521#endif
14bfc3f5 3522
89fc3421
CC
3523#ifdef HAVE_TARGET_32_LITTLE
3524template
3525Symbol*
3526Symbol_table::add_from_pluginobj<32, false>(
3527 Sized_pluginobj<32, false>* obj,
3528 const char* name,
3529 const char* ver,
3530 elfcpp::Sym<32, false>* sym);
3531#endif
3532
3533#ifdef HAVE_TARGET_32_BIG
3534template
3535Symbol*
3536Symbol_table::add_from_pluginobj<32, true>(
3537 Sized_pluginobj<32, true>* obj,
3538 const char* name,
3539 const char* ver,
3540 elfcpp::Sym<32, true>* sym);
3541#endif
3542
3543#ifdef HAVE_TARGET_64_LITTLE
3544template
3545Symbol*
3546Symbol_table::add_from_pluginobj<64, false>(
3547 Sized_pluginobj<64, false>* obj,
3548 const char* name,
3549 const char* ver,
3550 elfcpp::Sym<64, false>* sym);
3551#endif
3552
3553#ifdef HAVE_TARGET_64_BIG
3554template
3555Symbol*
3556Symbol_table::add_from_pluginobj<64, true>(
3557 Sized_pluginobj<64, true>* obj,
3558 const char* name,
3559 const char* ver,
3560 elfcpp::Sym<64, true>* sym);
3561#endif
3562
193a53d9 3563#ifdef HAVE_TARGET_32_LITTLE
dbe717ef
ILT
3564template
3565void
193a53d9
ILT
3566Symbol_table::add_from_dynobj<32, false>(
3567 Sized_dynobj<32, false>* dynobj,
dbe717ef
ILT
3568 const unsigned char* syms,
3569 size_t count,
3570 const char* sym_names,
3571 size_t sym_name_size,
3572 const unsigned char* versym,
3573 size_t versym_size,
92de84a6 3574 const std::vector<const char*>* version_map,
6fa2a40b 3575 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3576 size_t* defined);
193a53d9 3577#endif
dbe717ef 3578
193a53d9 3579#ifdef HAVE_TARGET_32_BIG
dbe717ef
ILT
3580template
3581void
193a53d9
ILT
3582Symbol_table::add_from_dynobj<32, true>(
3583 Sized_dynobj<32, true>* dynobj,
dbe717ef
ILT
3584 const unsigned char* syms,
3585 size_t count,
3586 const char* sym_names,
3587 size_t sym_name_size,
3588 const unsigned char* versym,
3589 size_t versym_size,
92de84a6 3590 const std::vector<const char*>* version_map,
6fa2a40b 3591 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3592 size_t* defined);
193a53d9 3593#endif
dbe717ef 3594
193a53d9 3595#ifdef HAVE_TARGET_64_LITTLE
dbe717ef
ILT
3596template
3597void
193a53d9
ILT
3598Symbol_table::add_from_dynobj<64, false>(
3599 Sized_dynobj<64, false>* dynobj,
dbe717ef
ILT
3600 const unsigned char* syms,
3601 size_t count,
3602 const char* sym_names,
3603 size_t sym_name_size,
3604 const unsigned char* versym,
3605 size_t versym_size,
92de84a6 3606 const std::vector<const char*>* version_map,
6fa2a40b 3607 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3608 size_t* defined);
193a53d9 3609#endif
dbe717ef 3610
193a53d9 3611#ifdef HAVE_TARGET_64_BIG
dbe717ef
ILT
3612template
3613void
193a53d9
ILT
3614Symbol_table::add_from_dynobj<64, true>(
3615 Sized_dynobj<64, true>* dynobj,
dbe717ef
ILT
3616 const unsigned char* syms,
3617 size_t count,
3618 const char* sym_names,
3619 size_t sym_name_size,
3620 const unsigned char* versym,
3621 size_t versym_size,
92de84a6 3622 const std::vector<const char*>* version_map,
6fa2a40b 3623 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3624 size_t* defined);
193a53d9 3625#endif
dbe717ef 3626
cdc29364
CC
3627#ifdef HAVE_TARGET_32_LITTLE
3628template
26d3c67d 3629Sized_symbol<32>*
cdc29364
CC
3630Symbol_table::add_from_incrobj(
3631 Object* obj,
3632 const char* name,
3633 const char* ver,
3634 elfcpp::Sym<32, false>* sym);
3635#endif
3636
3637#ifdef HAVE_TARGET_32_BIG
3638template
26d3c67d 3639Sized_symbol<32>*
cdc29364
CC
3640Symbol_table::add_from_incrobj(
3641 Object* obj,
3642 const char* name,
3643 const char* ver,
3644 elfcpp::Sym<32, true>* sym);
3645#endif
3646
3647#ifdef HAVE_TARGET_64_LITTLE
3648template
26d3c67d 3649Sized_symbol<64>*
cdc29364
CC
3650Symbol_table::add_from_incrobj(
3651 Object* obj,
3652 const char* name,
3653 const char* ver,
3654 elfcpp::Sym<64, false>* sym);
3655#endif
3656
3657#ifdef HAVE_TARGET_64_BIG
3658template
26d3c67d 3659Sized_symbol<64>*
cdc29364
CC
3660Symbol_table::add_from_incrobj(
3661 Object* obj,
3662 const char* name,
3663 const char* ver,
3664 elfcpp::Sym<64, true>* sym);
3665#endif
3666
46fe1623
ILT
3667#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3668template
3669void
fe8718a4 3670Symbol_table::define_with_copy_reloc<32>(
fe8718a4
ILT
3671 Sized_symbol<32>* sym,
3672 Output_data* posd,
2ea97941 3673 elfcpp::Elf_types<32>::Elf_Addr value);
46fe1623
ILT
3674#endif
3675
3676#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3677template
3678void
fe8718a4 3679Symbol_table::define_with_copy_reloc<64>(
fe8718a4
ILT
3680 Sized_symbol<64>* sym,
3681 Output_data* posd,
2ea97941 3682 elfcpp::Elf_types<64>::Elf_Addr value);
46fe1623
ILT
3683#endif
3684
beacaa96
CC
3685#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3686template
3687void
3688Sized_symbol<32>::init_output_data(const char* name, const char* version,
3689 Output_data* od, Value_type value,
3690 Size_type symsize, elfcpp::STT type,
3691 elfcpp::STB binding,
3692 elfcpp::STV visibility,
3693 unsigned char nonvis,
3694 bool offset_is_from_end,
3695 bool is_predefined);
3696#endif
3697
3698#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3699template
3700void
3701Sized_symbol<64>::init_output_data(const char* name, const char* version,
3702 Output_data* od, Value_type value,
3703 Size_type symsize, elfcpp::STT type,
3704 elfcpp::STB binding,
3705 elfcpp::STV visibility,
3706 unsigned char nonvis,
3707 bool offset_is_from_end,
3708 bool is_predefined);
3709#endif
3710
75f2446e
ILT
3711#ifdef HAVE_TARGET_32_LITTLE
3712template
3713void
3714Warnings::issue_warning<32, false>(const Symbol* sym,
3715 const Relocate_info<32, false>* relinfo,
3716 size_t relnum, off_t reloffset) const;
3717#endif
3718
3719#ifdef HAVE_TARGET_32_BIG
3720template
3721void
3722Warnings::issue_warning<32, true>(const Symbol* sym,
3723 const Relocate_info<32, true>* relinfo,
3724 size_t relnum, off_t reloffset) const;
3725#endif
3726
3727#ifdef HAVE_TARGET_64_LITTLE
3728template
3729void
3730Warnings::issue_warning<64, false>(const Symbol* sym,
3731 const Relocate_info<64, false>* relinfo,
3732 size_t relnum, off_t reloffset) const;
3733#endif
3734
3735#ifdef HAVE_TARGET_64_BIG
3736template
3737void
3738Warnings::issue_warning<64, true>(const Symbol* sym,
3739 const Relocate_info<64, true>* relinfo,
3740 size_t relnum, off_t reloffset) const;
3741#endif
3742
14bfc3f5 3743} // End namespace gold.