]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blame - gold/symtab.cc
2011-06-29 Tristan Gingold <gingold@adacore.com>
[thirdparty/binutils-gdb.git] / gold / symtab.cc
CommitLineData
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1// symtab.cc -- the gold symbol table
2
0f3b89d8 3// Copyright 2006, 2007, 2008, 2009, 2010, 2011 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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CC
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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CC
237 bool offset_is_from_end,
238 bool is_predefined)
ead1e424 239{
2ea97941 240 this->init_base_output_data(name, version, od, type, binding, visibility,
5146f448 241 nonvis, offset_is_from_end, is_predefined);
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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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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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CC
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
c82fbeee
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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
337inline bool
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
436ca963
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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
ST
363 return false;
364 }
365
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366 // If the symbol was forced local in a version script, do not add it.
367 if (this->is_forced_local())
368 return false;
369
c82fbeee
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370 // If the symbol was forced dynamic in a --dynamic-list file, add it.
371 if (parameters->options().in_dynamic_list(this->name()))
372 return true;
373
374 // If dynamic-list-data was specified, add any STT_OBJECT.
375 if (parameters->options().dynamic_list_data()
376 && !this->is_from_dynobj()
377 && this->type() == elfcpp::STT_OBJECT)
378 return true;
379
380 // If --dynamic-list-cpp-new was specified, add any new/delete symbol.
381 // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols.
382 if ((parameters->options().dynamic_list_cpp_new()
383 || parameters->options().dynamic_list_cpp_typeinfo())
384 && !this->is_from_dynobj())
385 {
386 // TODO(csilvers): We could probably figure out if we're an operator
387 // new/delete or typeinfo without the need to demangle.
2ea97941
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388 char* demangled_name = cplus_demangle(this->name(),
389 DMGL_ANSI | DMGL_PARAMS);
390 if (demangled_name == NULL)
c82fbeee
CS
391 {
392 // Not a C++ symbol, so it can't satisfy these flags
393 }
394 else if (parameters->options().dynamic_list_cpp_new()
2ea97941
ILT
395 && (strprefix(demangled_name, "operator new")
396 || strprefix(demangled_name, "operator delete")))
c82fbeee 397 {
2ea97941 398 free(demangled_name);
c82fbeee
CS
399 return true;
400 }
401 else if (parameters->options().dynamic_list_cpp_typeinfo()
2ea97941
ILT
402 && (strprefix(demangled_name, "typeinfo name for")
403 || strprefix(demangled_name, "typeinfo for")))
c82fbeee 404 {
2ea97941 405 free(demangled_name);
c82fbeee
CS
406 return true;
407 }
408 else
2ea97941 409 free(demangled_name);
c82fbeee
CS
410 }
411
436ca963
ILT
412 // If exporting all symbols or building a shared library,
413 // and the symbol is defined in a regular object and is
414 // externally visible, we need to add it.
8851ecca 415 if ((parameters->options().export_dynamic() || parameters->options().shared())
436ca963
ILT
416 && !this->is_from_dynobj()
417 && this->is_externally_visible())
418 return true;
419
420 return false;
421}
422
b3b74ddc
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423// Return true if the final value of this symbol is known at link
424// time.
425
426bool
427Symbol::final_value_is_known() const
428{
429 // If we are not generating an executable, then no final values are
430 // known, since they will change at runtime.
374ad285
ILT
431 if (parameters->options().output_is_position_independent()
432 || parameters->options().relocatable())
b3b74ddc
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433 return false;
434
f3e9c5c5
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435 // If the symbol is not from an object file, and is not undefined,
436 // then it is defined, and known.
b3b74ddc 437 if (this->source_ != FROM_OBJECT)
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ILT
438 {
439 if (this->source_ != IS_UNDEFINED)
440 return true;
441 }
442 else
443 {
444 // If the symbol is from a dynamic object, then the final value
445 // is not known.
446 if (this->object()->is_dynamic())
447 return false;
b3b74ddc 448
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449 // If the symbol is not undefined (it is defined or common),
450 // then the final value is known.
451 if (!this->is_undefined())
452 return true;
453 }
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454
455 // If the symbol is undefined, then whether the final value is known
456 // depends on whether we are doing a static link. If we are doing a
457 // dynamic link, then the final value could be filled in at runtime.
458 // This could reasonably be the case for a weak undefined symbol.
459 return parameters->doing_static_link();
460}
461
77e65537 462// Return the output section where this symbol is defined.
a445fddf 463
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464Output_section*
465Symbol::output_section() const
a445fddf
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466{
467 switch (this->source_)
468 {
469 case FROM_OBJECT:
77e65537 470 {
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471 unsigned int shndx = this->u_.from_object.shndx;
472 if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_)
77e65537
ILT
473 {
474 gold_assert(!this->u_.from_object.object->is_dynamic());
89fc3421 475 gold_assert(this->u_.from_object.object->pluginobj() == NULL);
77e65537 476 Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object);
2ea97941 477 return relobj->output_section(shndx);
77e65537
ILT
478 }
479 return NULL;
480 }
481
a445fddf 482 case IN_OUTPUT_DATA:
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483 return this->u_.in_output_data.output_data->output_section();
484
a445fddf 485 case IN_OUTPUT_SEGMENT:
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486 case IS_CONSTANT:
487 case IS_UNDEFINED:
77e65537
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488 return NULL;
489
490 default:
491 gold_unreachable();
492 }
493}
494
495// Set the symbol's output section. This is used for symbols defined
496// in scripts. This should only be called after the symbol table has
497// been finalized.
498
499void
500Symbol::set_output_section(Output_section* os)
501{
502 switch (this->source_)
503 {
504 case FROM_OBJECT:
505 case IN_OUTPUT_DATA:
506 gold_assert(this->output_section() == os);
507 break;
f3e9c5c5 508 case IS_CONSTANT:
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509 this->source_ = IN_OUTPUT_DATA;
510 this->u_.in_output_data.output_data = os;
511 this->u_.in_output_data.offset_is_from_end = false;
512 break;
513 case IN_OUTPUT_SEGMENT:
f3e9c5c5 514 case IS_UNDEFINED:
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ILT
515 default:
516 gold_unreachable();
517 }
518}
519
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520// Class Symbol_table.
521
09124467 522Symbol_table::Symbol_table(unsigned int count,
2ea97941 523 const Version_script_info& version_script)
6d013333 524 : saw_undefined_(0), offset_(0), table_(count), namepool_(),
8a5e3e08
ILT
525 forwarders_(), commons_(), tls_commons_(), small_commons_(),
526 large_commons_(), forced_locals_(), warnings_(),
2ea97941 527 version_script_(version_script), gc_(NULL), icf_(NULL)
14bfc3f5 528{
6d013333 529 namepool_.reserve(count);
14bfc3f5
ILT
530}
531
532Symbol_table::~Symbol_table()
533{
534}
535
ad8f37d1
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536// The symbol table key equality function. This is called with
537// Stringpool keys.
14bfc3f5 538
ad8f37d1 539inline bool
14bfc3f5
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540Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1,
541 const Symbol_table_key& k2) const
542{
543 return k1.first == k2.first && k1.second == k2.second;
544}
545
ef15dade 546bool
2ea97941 547Symbol_table::is_section_folded(Object* obj, unsigned int shndx) const
ef15dade 548{
032ce4e9 549 return (parameters->options().icf_enabled()
2ea97941 550 && this->icf_->is_section_folded(obj, shndx));
ef15dade
ST
551}
552
6d03d481
ST
553// For symbols that have been listed with -u option, add them to the
554// work list to avoid gc'ing them.
555
556void
88a4108b 557Symbol_table::gc_mark_undef_symbols(Layout* layout)
6d03d481
ST
558{
559 for (options::String_set::const_iterator p =
560 parameters->options().undefined_begin();
561 p != parameters->options().undefined_end();
562 ++p)
563 {
2ea97941
ILT
564 const char* name = p->c_str();
565 Symbol* sym = this->lookup(name);
ca09d69a 566 gold_assert(sym != NULL);
6d03d481
ST
567 if (sym->source() == Symbol::FROM_OBJECT
568 && !sym->object()->is_dynamic())
569 {
570 Relobj* obj = static_cast<Relobj*>(sym->object());
571 bool is_ordinary;
2ea97941 572 unsigned int shndx = sym->shndx(&is_ordinary);
6d03d481
ST
573 if (is_ordinary)
574 {
575 gold_assert(this->gc_ != NULL);
2ea97941 576 this->gc_->worklist().push(Section_id(obj, shndx));
6d03d481
ST
577 }
578 }
579 }
88a4108b
ILT
580
581 for (Script_options::referenced_const_iterator p =
582 layout->script_options()->referenced_begin();
583 p != layout->script_options()->referenced_end();
584 ++p)
585 {
586 Symbol* sym = this->lookup(p->c_str());
587 gold_assert(sym != NULL);
588 if (sym->source() == Symbol::FROM_OBJECT
589 && !sym->object()->is_dynamic())
590 {
591 Relobj* obj = static_cast<Relobj*>(sym->object());
592 bool is_ordinary;
593 unsigned int shndx = sym->shndx(&is_ordinary);
594 if (is_ordinary)
595 {
596 gold_assert(this->gc_ != NULL);
597 this->gc_->worklist().push(Section_id(obj, shndx));
598 }
599 }
600 }
6d03d481
ST
601}
602
603void
604Symbol_table::gc_mark_symbol_for_shlib(Symbol* sym)
605{
606 if (!sym->is_from_dynobj()
607 && sym->is_externally_visible())
608 {
609 //Add the object and section to the work list.
610 Relobj* obj = static_cast<Relobj*>(sym->object());
611 bool is_ordinary;
2ea97941
ILT
612 unsigned int shndx = sym->shndx(&is_ordinary);
613 if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
6d03d481
ST
614 {
615 gold_assert(this->gc_!= NULL);
2ea97941 616 this->gc_->worklist().push(Section_id(obj, shndx));
6d03d481
ST
617 }
618 }
619}
620
621// When doing garbage collection, keep symbols that have been seen in
622// dynamic objects.
623inline void
624Symbol_table::gc_mark_dyn_syms(Symbol* sym)
625{
626 if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT
627 && !sym->object()->is_dynamic())
628 {
ca09d69a 629 Relobj* obj = static_cast<Relobj*>(sym->object());
6d03d481 630 bool is_ordinary;
2ea97941
ILT
631 unsigned int shndx = sym->shndx(&is_ordinary);
632 if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
6d03d481
ST
633 {
634 gold_assert(this->gc_ != NULL);
2ea97941 635 this->gc_->worklist().push(Section_id(obj, shndx));
6d03d481
ST
636 }
637 }
638}
639
dd8670e5 640// Make TO a symbol which forwards to FROM.
14bfc3f5
ILT
641
642void
643Symbol_table::make_forwarder(Symbol* from, Symbol* to)
644{
a3ad94ed
ILT
645 gold_assert(from != to);
646 gold_assert(!from->is_forwarder() && !to->is_forwarder());
14bfc3f5
ILT
647 this->forwarders_[from] = to;
648 from->set_forwarder();
649}
650
61ba1cf9
ILT
651// Resolve the forwards from FROM, returning the real symbol.
652
14bfc3f5 653Symbol*
c06b7b0b 654Symbol_table::resolve_forwards(const Symbol* from) const
14bfc3f5 655{
a3ad94ed 656 gold_assert(from->is_forwarder());
c06b7b0b 657 Unordered_map<const Symbol*, Symbol*>::const_iterator p =
14bfc3f5 658 this->forwarders_.find(from);
a3ad94ed 659 gold_assert(p != this->forwarders_.end());
14bfc3f5
ILT
660 return p->second;
661}
662
61ba1cf9
ILT
663// Look up a symbol by name.
664
665Symbol*
2ea97941 666Symbol_table::lookup(const char* name, const char* version) const
61ba1cf9 667{
f0641a0b 668 Stringpool::Key name_key;
2ea97941
ILT
669 name = this->namepool_.find(name, &name_key);
670 if (name == NULL)
61ba1cf9 671 return NULL;
f0641a0b
ILT
672
673 Stringpool::Key version_key = 0;
2ea97941 674 if (version != NULL)
61ba1cf9 675 {
2ea97941
ILT
676 version = this->namepool_.find(version, &version_key);
677 if (version == NULL)
61ba1cf9
ILT
678 return NULL;
679 }
680
f0641a0b 681 Symbol_table_key key(name_key, version_key);
61ba1cf9
ILT
682 Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
683 if (p == this->table_.end())
684 return NULL;
685 return p->second;
686}
687
14bfc3f5
ILT
688// Resolve a Symbol with another Symbol. This is only used in the
689// unusual case where there are references to both an unversioned
690// symbol and a symbol with a version, and we then discover that that
1564db8d
ILT
691// version is the default version. Because this is unusual, we do
692// this the slow way, by converting back to an ELF symbol.
14bfc3f5 693
1564db8d 694template<int size, bool big_endian>
14bfc3f5 695void
95d14cd3 696Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from)
14bfc3f5 697{
1564db8d
ILT
698 unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
699 elfcpp::Sym_write<size, big_endian> esym(buf);
d491d34e 700 // We don't bother to set the st_name or the st_shndx field.
1564db8d
ILT
701 esym.put_st_value(from->value());
702 esym.put_st_size(from->symsize());
703 esym.put_st_info(from->binding(), from->type());
ead1e424 704 esym.put_st_other(from->visibility(), from->nonvis());
d491d34e 705 bool is_ordinary;
2ea97941
ILT
706 unsigned int shndx = from->shndx(&is_ordinary);
707 this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(),
95d14cd3 708 from->version());
1ebd95fd
ILT
709 if (from->in_reg())
710 to->set_in_reg();
711 if (from->in_dyn())
712 to->set_in_dyn();
6d03d481
ST
713 if (parameters->options().gc_sections())
714 this->gc_mark_dyn_syms(to);
14bfc3f5
ILT
715}
716
0602e05a
ILT
717// Record that a symbol is forced to be local by a version script or
718// by visibility.
55a93433
ILT
719
720void
721Symbol_table::force_local(Symbol* sym)
722{
723 if (!sym->is_defined() && !sym->is_common())
724 return;
725 if (sym->is_forced_local())
726 {
727 // We already got this one.
728 return;
729 }
730 sym->set_is_forced_local();
731 this->forced_locals_.push_back(sym);
732}
733
0864d551
ILT
734// Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
735// is only called for undefined symbols, when at least one --wrap
736// option was used.
737
738const char*
2ea97941 739Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key)
0864d551
ILT
740{
741 // For some targets, we need to ignore a specific character when
742 // wrapping, and add it back later.
743 char prefix = '\0';
2ea97941 744 if (name[0] == parameters->target().wrap_char())
0864d551 745 {
2ea97941
ILT
746 prefix = name[0];
747 ++name;
0864d551
ILT
748 }
749
2ea97941 750 if (parameters->options().is_wrap(name))
0864d551
ILT
751 {
752 // Turn NAME into __wrap_NAME.
753 std::string s;
754 if (prefix != '\0')
755 s += prefix;
756 s += "__wrap_";
2ea97941 757 s += name;
0864d551
ILT
758
759 // This will give us both the old and new name in NAMEPOOL_, but
760 // that is OK. Only the versions we need will wind up in the
761 // real string table in the output file.
762 return this->namepool_.add(s.c_str(), true, name_key);
763 }
764
765 const char* const real_prefix = "__real_";
766 const size_t real_prefix_length = strlen(real_prefix);
2ea97941
ILT
767 if (strncmp(name, real_prefix, real_prefix_length) == 0
768 && parameters->options().is_wrap(name + real_prefix_length))
0864d551
ILT
769 {
770 // Turn __real_NAME into NAME.
771 std::string s;
772 if (prefix != '\0')
773 s += prefix;
2ea97941 774 s += name + real_prefix_length;
0864d551
ILT
775 return this->namepool_.add(s.c_str(), true, name_key);
776 }
777
2ea97941 778 return name;
0864d551
ILT
779}
780
8c500701
ILT
781// This is called when we see a symbol NAME/VERSION, and the symbol
782// already exists in the symbol table, and VERSION is marked as being
783// the default version. SYM is the NAME/VERSION symbol we just added.
784// DEFAULT_IS_NEW is true if this is the first time we have seen the
785// symbol NAME/NULL. PDEF points to the entry for NAME/NULL.
786
787template<int size, bool big_endian>
788void
789Symbol_table::define_default_version(Sized_symbol<size>* sym,
790 bool default_is_new,
791 Symbol_table_type::iterator pdef)
792{
793 if (default_is_new)
794 {
795 // This is the first time we have seen NAME/NULL. Make
796 // NAME/NULL point to NAME/VERSION, and mark SYM as the default
797 // version.
798 pdef->second = sym;
799 sym->set_is_default();
800 }
801 else if (pdef->second == sym)
802 {
803 // NAME/NULL already points to NAME/VERSION. Don't mark the
804 // symbol as the default if it is not already the default.
805 }
806 else
807 {
808 // This is the unfortunate case where we already have entries
809 // for both NAME/VERSION and NAME/NULL. We now see a symbol
810 // NAME/VERSION where VERSION is the default version. We have
811 // already resolved this new symbol with the existing
812 // NAME/VERSION symbol.
813
814 // It's possible that NAME/NULL and NAME/VERSION are both
815 // defined in regular objects. This can only happen if one
816 // object file defines foo and another defines foo@@ver. This
817 // is somewhat obscure, but we call it a multiple definition
818 // error.
819
820 // It's possible that NAME/NULL actually has a version, in which
821 // case it won't be the same as VERSION. This happens with
822 // ver_test_7.so in the testsuite for the symbol t2_2. We see
823 // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We
824 // then see an unadorned t2_2 in an object file and give it
825 // version VER1 from the version script. This looks like a
826 // default definition for VER1, so it looks like we should merge
827 // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's
828 // not obvious that this is an error, either. So we just punt.
829
830 // If one of the symbols has non-default visibility, and the
831 // other is defined in a shared object, then they are different
832 // symbols.
833
834 // Otherwise, we just resolve the symbols as though they were
835 // the same.
836
837 if (pdef->second->version() != NULL)
838 gold_assert(pdef->second->version() != sym->version());
839 else if (sym->visibility() != elfcpp::STV_DEFAULT
840 && pdef->second->is_from_dynobj())
841 ;
842 else if (pdef->second->visibility() != elfcpp::STV_DEFAULT
843 && sym->is_from_dynobj())
844 ;
845 else
846 {
847 const Sized_symbol<size>* symdef;
848 symdef = this->get_sized_symbol<size>(pdef->second);
849 Symbol_table::resolve<size, big_endian>(sym, symdef);
850 this->make_forwarder(pdef->second, sym);
851 pdef->second = sym;
852 sym->set_is_default();
853 }
854 }
855}
856
14bfc3f5
ILT
857// Add one symbol from OBJECT to the symbol table. NAME is symbol
858// name and VERSION is the version; both are canonicalized. DEF is
d491d34e
ILT
859// whether this is the default version. ST_SHNDX is the symbol's
860// section index; IS_ORDINARY is whether this is a normal section
861// rather than a special code.
14bfc3f5 862
8781f709
ILT
863// If IS_DEFAULT_VERSION is true, then this is the definition of a
864// default version of a symbol. That means that any lookup of
865// NAME/NULL and any lookup of NAME/VERSION should always return the
866// same symbol. This is obvious for references, but in particular we
867// want to do this for definitions: overriding NAME/NULL should also
868// override NAME/VERSION. If we don't do that, it would be very hard
869// to override functions in a shared library which uses versioning.
14bfc3f5
ILT
870
871// We implement this by simply making both entries in the hash table
872// point to the same Symbol structure. That is easy enough if this is
873// the first time we see NAME/NULL or NAME/VERSION, but it is possible
874// that we have seen both already, in which case they will both have
875// independent entries in the symbol table. We can't simply change
876// the symbol table entry, because we have pointers to the entries
877// attached to the object files. So we mark the entry attached to the
878// object file as a forwarder, and record it in the forwarders_ map.
879// Note that entries in the hash table will never be marked as
880// forwarders.
70e654ba 881//
d491d34e
ILT
882// ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
883// ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
884// for a special section code. ST_SHNDX may be modified if the symbol
885// is defined in a section being discarded.
14bfc3f5
ILT
886
887template<int size, bool big_endian>
aeddab66 888Sized_symbol<size>*
2ea97941 889Symbol_table::add_from_object(Object* object,
ca09d69a 890 const char* name,
f0641a0b 891 Stringpool::Key name_key,
ca09d69a 892 const char* version,
f0641a0b 893 Stringpool::Key version_key,
8781f709 894 bool is_default_version,
70e654ba 895 const elfcpp::Sym<size, big_endian>& sym,
d491d34e
ILT
896 unsigned int st_shndx,
897 bool is_ordinary,
898 unsigned int orig_st_shndx)
14bfc3f5 899{
c5818ff1 900 // Print a message if this symbol is being traced.
2ea97941 901 if (parameters->options().is_trace_symbol(name))
c5818ff1 902 {
d491d34e 903 if (orig_st_shndx == elfcpp::SHN_UNDEF)
2ea97941 904 gold_info(_("%s: reference to %s"), object->name().c_str(), name);
c5818ff1 905 else
2ea97941 906 gold_info(_("%s: definition of %s"), object->name().c_str(), name);
c5818ff1
CC
907 }
908
0864d551
ILT
909 // For an undefined symbol, we may need to adjust the name using
910 // --wrap.
d491d34e 911 if (orig_st_shndx == elfcpp::SHN_UNDEF
c5818ff1 912 && parameters->options().any_wrap())
0864d551 913 {
2ea97941
ILT
914 const char* wrap_name = this->wrap_symbol(name, &name_key);
915 if (wrap_name != name)
0864d551
ILT
916 {
917 // If we see a reference to malloc with version GLIBC_2.0,
918 // and we turn it into a reference to __wrap_malloc, then we
919 // discard the version number. Otherwise the user would be
920 // required to specify the correct version for
921 // __wrap_malloc.
2ea97941 922 version = NULL;
0864d551 923 version_key = 0;
2ea97941 924 name = wrap_name;
0864d551
ILT
925 }
926 }
927
14bfc3f5
ILT
928 Symbol* const snull = NULL;
929 std::pair<typename Symbol_table_type::iterator, bool> ins =
f0641a0b
ILT
930 this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
931 snull));
14bfc3f5 932
8781f709 933 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
14bfc3f5 934 std::make_pair(this->table_.end(), false);
8781f709 935 if (is_default_version)
14bfc3f5 936 {
f0641a0b 937 const Stringpool::Key vnull_key = 0;
8781f709
ILT
938 insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key,
939 vnull_key),
940 snull));
14bfc3f5
ILT
941 }
942
943 // ins.first: an iterator, which is a pointer to a pair.
944 // ins.first->first: the key (a pair of name and version).
945 // ins.first->second: the value (Symbol*).
946 // ins.second: true if new entry was inserted, false if not.
947
1564db8d 948 Sized_symbol<size>* ret;
ead1e424
ILT
949 bool was_undefined;
950 bool was_common;
14bfc3f5
ILT
951 if (!ins.second)
952 {
953 // We already have an entry for NAME/VERSION.
7d1a9ebb 954 ret = this->get_sized_symbol<size>(ins.first->second);
a3ad94ed 955 gold_assert(ret != NULL);
ead1e424
ILT
956
957 was_undefined = ret->is_undefined();
958 was_common = ret->is_common();
959
2ea97941
ILT
960 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
961 version);
6d03d481
ST
962 if (parameters->options().gc_sections())
963 this->gc_mark_dyn_syms(ret);
14bfc3f5 964
8781f709
ILT
965 if (is_default_version)
966 this->define_default_version<size, big_endian>(ret, insdefault.second,
967 insdefault.first);
14bfc3f5
ILT
968 }
969 else
970 {
971 // This is the first time we have seen NAME/VERSION.
a3ad94ed 972 gold_assert(ins.first->second == NULL);
ead1e424 973
8781f709 974 if (is_default_version && !insdefault.second)
14bfc3f5 975 {
14b31740
ILT
976 // We already have an entry for NAME/NULL. If we override
977 // it, then change it to NAME/VERSION.
8781f709 978 ret = this->get_sized_symbol<size>(insdefault.first->second);
18e6b24e
ILT
979
980 was_undefined = ret->is_undefined();
981 was_common = ret->is_common();
982
2ea97941
ILT
983 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
984 version);
6d03d481
ST
985 if (parameters->options().gc_sections())
986 this->gc_mark_dyn_syms(ret);
14bfc3f5
ILT
987 ins.first->second = ret;
988 }
989 else
990 {
18e6b24e
ILT
991 was_undefined = false;
992 was_common = false;
993
f6ce93d6 994 Sized_target<size, big_endian>* target =
029ba973 995 parameters->sized_target<size, big_endian>();
1564db8d
ILT
996 if (!target->has_make_symbol())
997 ret = new Sized_symbol<size>();
998 else
14bfc3f5 999 {
1564db8d
ILT
1000 ret = target->make_symbol();
1001 if (ret == NULL)
14bfc3f5
ILT
1002 {
1003 // This means that we don't want a symbol table
1004 // entry after all.
8781f709 1005 if (!is_default_version)
14bfc3f5
ILT
1006 this->table_.erase(ins.first);
1007 else
1008 {
8781f709
ILT
1009 this->table_.erase(insdefault.first);
1010 // Inserting INSDEFAULT invalidated INS.
f0641a0b
ILT
1011 this->table_.erase(std::make_pair(name_key,
1012 version_key));
14bfc3f5
ILT
1013 }
1014 return NULL;
1015 }
1016 }
14bfc3f5 1017
2ea97941 1018 ret->init_object(name, version, object, sym, st_shndx, is_ordinary);
1564db8d 1019
14bfc3f5 1020 ins.first->second = ret;
8781f709 1021 if (is_default_version)
14bfc3f5
ILT
1022 {
1023 // This is the first time we have seen NAME/NULL. Point
1024 // it at the new entry for NAME/VERSION.
8781f709
ILT
1025 gold_assert(insdefault.second);
1026 insdefault.first->second = ret;
14bfc3f5
ILT
1027 }
1028 }
8c500701 1029
8781f709 1030 if (is_default_version)
8c500701 1031 ret->set_is_default();
14bfc3f5
ILT
1032 }
1033
ead1e424
ILT
1034 // Record every time we see a new undefined symbol, to speed up
1035 // archive groups.
1036 if (!was_undefined && ret->is_undefined())
0f3b89d8
ILT
1037 {
1038 ++this->saw_undefined_;
1039 if (parameters->options().has_plugins())
1040 parameters->options().plugins()->new_undefined_symbol(ret);
1041 }
ead1e424
ILT
1042
1043 // Keep track of common symbols, to speed up common symbol
1044 // allocation.
1045 if (!was_common && ret->is_common())
155a0dd7 1046 {
8a5e3e08 1047 if (ret->type() == elfcpp::STT_TLS)
155a0dd7 1048 this->tls_commons_.push_back(ret);
8a5e3e08
ILT
1049 else if (!is_ordinary
1050 && st_shndx == parameters->target().small_common_shndx())
1051 this->small_commons_.push_back(ret);
1052 else if (!is_ordinary
1053 && st_shndx == parameters->target().large_common_shndx())
1054 this->large_commons_.push_back(ret);
1055 else
1056 this->commons_.push_back(ret);
155a0dd7 1057 }
ead1e424 1058
0602e05a
ILT
1059 // If we're not doing a relocatable link, then any symbol with
1060 // hidden or internal visibility is local.
1061 if ((ret->visibility() == elfcpp::STV_HIDDEN
1062 || ret->visibility() == elfcpp::STV_INTERNAL)
1063 && (ret->binding() == elfcpp::STB_GLOBAL
adcf2816 1064 || ret->binding() == elfcpp::STB_GNU_UNIQUE
0602e05a
ILT
1065 || ret->binding() == elfcpp::STB_WEAK)
1066 && !parameters->options().relocatable())
1067 this->force_local(ret);
1068
14bfc3f5
ILT
1069 return ret;
1070}
1071
f6ce93d6 1072// Add all the symbols in a relocatable object to the hash table.
14bfc3f5
ILT
1073
1074template<int size, bool big_endian>
1075void
dbe717ef 1076Symbol_table::add_from_relobj(
6fa2a40b 1077 Sized_relobj_file<size, big_endian>* relobj,
f6ce93d6 1078 const unsigned char* syms,
14bfc3f5 1079 size_t count,
d491d34e 1080 size_t symndx_offset,
14bfc3f5
ILT
1081 const char* sym_names,
1082 size_t sym_name_size,
6fa2a40b 1083 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
ca09d69a 1084 size_t* defined)
14bfc3f5 1085{
92de84a6
ILT
1086 *defined = 0;
1087
8851ecca 1088 gold_assert(size == parameters->target().get_size());
14bfc3f5 1089
a783673b
ILT
1090 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1091
88dd47ac
ILT
1092 const bool just_symbols = relobj->just_symbols();
1093
f6ce93d6 1094 const unsigned char* p = syms;
a783673b 1095 for (size_t i = 0; i < count; ++i, p += sym_size)
14bfc3f5 1096 {
92de84a6
ILT
1097 (*sympointers)[i] = NULL;
1098
14bfc3f5
ILT
1099 elfcpp::Sym<size, big_endian> sym(p);
1100
d491d34e 1101 unsigned int st_name = sym.get_st_name();
14bfc3f5
ILT
1102 if (st_name >= sym_name_size)
1103 {
75f2446e
ILT
1104 relobj->error(_("bad global symbol name offset %u at %zu"),
1105 st_name, i);
1106 continue;
14bfc3f5
ILT
1107 }
1108
2ea97941 1109 const char* name = sym_names + st_name;
dbe717ef 1110
d491d34e
ILT
1111 bool is_ordinary;
1112 unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset,
1113 sym.get_st_shndx(),
1114 &is_ordinary);
1115 unsigned int orig_st_shndx = st_shndx;
1116 if (!is_ordinary)
1117 orig_st_shndx = elfcpp::SHN_UNDEF;
1118
92de84a6
ILT
1119 if (st_shndx != elfcpp::SHN_UNDEF)
1120 ++*defined;
1121
a783673b
ILT
1122 // A symbol defined in a section which we are not including must
1123 // be treated as an undefined symbol.
880cd20d 1124 bool is_defined_in_discarded_section = false;
a783673b 1125 if (st_shndx != elfcpp::SHN_UNDEF
d491d34e 1126 && is_ordinary
ce97fa81
ST
1127 && !relobj->is_section_included(st_shndx)
1128 && !this->is_section_folded(relobj, st_shndx))
880cd20d
ILT
1129 {
1130 st_shndx = elfcpp::SHN_UNDEF;
1131 is_defined_in_discarded_section = true;
1132 }
a783673b 1133
14bfc3f5
ILT
1134 // In an object file, an '@' in the name separates the symbol
1135 // name from the version name. If there are two '@' characters,
1136 // this is the default version.
2ea97941 1137 const char* ver = strchr(name, '@');
057ead22 1138 Stringpool::Key ver_key = 0;
09124467 1139 int namelen = 0;
8781f709
ILT
1140 // IS_DEFAULT_VERSION: is the version default?
1141 // IS_FORCED_LOCAL: is the symbol forced local?
1142 bool is_default_version = false;
1143 bool is_forced_local = false;
09124467
ILT
1144
1145 if (ver != NULL)
1146 {
1147 // The symbol name is of the form foo@VERSION or foo@@VERSION
2ea97941 1148 namelen = ver - name;
09124467
ILT
1149 ++ver;
1150 if (*ver == '@')
1151 {
8781f709 1152 is_default_version = true;
09124467
ILT
1153 ++ver;
1154 }
057ead22 1155 ver = this->namepool_.add(ver, true, &ver_key);
09124467 1156 }
5871526f
ILT
1157 // We don't want to assign a version to an undefined symbol,
1158 // even if it is listed in the version script. FIXME: What
1159 // about a common symbol?
057ead22
ILT
1160 else
1161 {
2ea97941 1162 namelen = strlen(name);
057ead22
ILT
1163 if (!this->version_script_.empty()
1164 && st_shndx != elfcpp::SHN_UNDEF)
1165 {
1166 // The symbol name did not have a version, but the
1167 // version script may assign a version anyway.
2ea97941 1168 std::string version;
98e090bd
ILT
1169 bool is_global;
1170 if (this->version_script_.get_symbol_version(name, &version,
1171 &is_global))
057ead22 1172 {
98e090bd
ILT
1173 if (!is_global)
1174 is_forced_local = true;
1175 else if (!version.empty())
057ead22 1176 {
2ea97941
ILT
1177 ver = this->namepool_.add_with_length(version.c_str(),
1178 version.length(),
057ead22
ILT
1179 true,
1180 &ver_key);
8781f709 1181 is_default_version = true;
057ead22
ILT
1182 }
1183 }
057ead22
ILT
1184 }
1185 }
14bfc3f5 1186
d491d34e
ILT
1187 elfcpp::Sym<size, big_endian>* psym = &sym;
1188 unsigned char symbuf[sym_size];
1189 elfcpp::Sym<size, big_endian> sym2(symbuf);
88dd47ac
ILT
1190 if (just_symbols)
1191 {
d491d34e 1192 memcpy(symbuf, p, sym_size);
88dd47ac 1193 elfcpp::Sym_write<size, big_endian> sw(symbuf);
d491d34e 1194 if (orig_st_shndx != elfcpp::SHN_UNDEF && is_ordinary)
88dd47ac
ILT
1195 {
1196 // Symbol values in object files are section relative.
1197 // This is normally what we want, but since here we are
1198 // converting the symbol to absolute we need to add the
1199 // section address. The section address in an object
1200 // file is normally zero, but people can use a linker
1201 // script to change it.
d491d34e
ILT
1202 sw.put_st_value(sym.get_st_value()
1203 + relobj->section_address(orig_st_shndx));
88dd47ac 1204 }
d491d34e
ILT
1205 st_shndx = elfcpp::SHN_ABS;
1206 is_ordinary = false;
88dd47ac
ILT
1207 psym = &sym2;
1208 }
1209
65514900 1210 // Fix up visibility if object has no-export set.
1c74fab0
ILT
1211 if (relobj->no_export()
1212 && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary))
65514900
CC
1213 {
1214 // We may have copied symbol already above.
1215 if (psym != &sym2)
1216 {
1217 memcpy(symbuf, p, sym_size);
1218 psym = &sym2;
1219 }
1220
1221 elfcpp::STV visibility = sym2.get_st_visibility();
1222 if (visibility == elfcpp::STV_DEFAULT
1223 || visibility == elfcpp::STV_PROTECTED)
1224 {
1225 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1226 unsigned char nonvis = sym2.get_st_nonvis();
1227 sw.put_st_other(elfcpp::STV_HIDDEN, nonvis);
1228 }
1229 }
1230
057ead22 1231 Stringpool::Key name_key;
2ea97941 1232 name = this->namepool_.add_with_length(name, namelen, true,
057ead22
ILT
1233 &name_key);
1234
aeddab66 1235 Sized_symbol<size>* res;
2ea97941 1236 res = this->add_from_object(relobj, name, name_key, ver, ver_key,
8781f709
ILT
1237 is_default_version, *psym, st_shndx,
1238 is_ordinary, orig_st_shndx);
6d03d481
ST
1239
1240 // If building a shared library using garbage collection, do not
1241 // treat externally visible symbols as garbage.
1242 if (parameters->options().gc_sections()
1243 && parameters->options().shared())
1244 this->gc_mark_symbol_for_shlib(res);
f0641a0b 1245
8781f709 1246 if (is_forced_local)
057ead22 1247 this->force_local(res);
14bfc3f5 1248
880cd20d
ILT
1249 if (is_defined_in_discarded_section)
1250 res->set_is_defined_in_discarded_section();
1251
730cdc88 1252 (*sympointers)[i] = res;
14bfc3f5
ILT
1253 }
1254}
1255
89fc3421
CC
1256// Add a symbol from a plugin-claimed file.
1257
1258template<int size, bool big_endian>
1259Symbol*
1260Symbol_table::add_from_pluginobj(
1261 Sized_pluginobj<size, big_endian>* obj,
2ea97941 1262 const char* name,
89fc3421
CC
1263 const char* ver,
1264 elfcpp::Sym<size, big_endian>* sym)
1265{
1266 unsigned int st_shndx = sym->get_st_shndx();
24998053 1267 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
89fc3421
CC
1268
1269 Stringpool::Key ver_key = 0;
8781f709
ILT
1270 bool is_default_version = false;
1271 bool is_forced_local = false;
89fc3421
CC
1272
1273 if (ver != NULL)
1274 {
1275 ver = this->namepool_.add(ver, true, &ver_key);
1276 }
1277 // We don't want to assign a version to an undefined symbol,
1278 // even if it is listed in the version script. FIXME: What
1279 // about a common symbol?
1280 else
1281 {
1282 if (!this->version_script_.empty()
1283 && st_shndx != elfcpp::SHN_UNDEF)
1284 {
1285 // The symbol name did not have a version, but the
1286 // version script may assign a version anyway.
2ea97941 1287 std::string version;
98e090bd
ILT
1288 bool is_global;
1289 if (this->version_script_.get_symbol_version(name, &version,
1290 &is_global))
89fc3421 1291 {
98e090bd
ILT
1292 if (!is_global)
1293 is_forced_local = true;
1294 else if (!version.empty())
89fc3421 1295 {
2ea97941
ILT
1296 ver = this->namepool_.add_with_length(version.c_str(),
1297 version.length(),
89fc3421
CC
1298 true,
1299 &ver_key);
8781f709 1300 is_default_version = true;
89fc3421
CC
1301 }
1302 }
89fc3421
CC
1303 }
1304 }
1305
1306 Stringpool::Key name_key;
2ea97941 1307 name = this->namepool_.add(name, true, &name_key);
89fc3421
CC
1308
1309 Sized_symbol<size>* res;
2ea97941 1310 res = this->add_from_object(obj, name, name_key, ver, ver_key,
8781f709
ILT
1311 is_default_version, *sym, st_shndx,
1312 is_ordinary, st_shndx);
89fc3421 1313
8781f709 1314 if (is_forced_local)
0602e05a 1315 this->force_local(res);
89fc3421
CC
1316
1317 return res;
1318}
1319
dbe717ef
ILT
1320// Add all the symbols in a dynamic object to the hash table.
1321
1322template<int size, bool big_endian>
1323void
1324Symbol_table::add_from_dynobj(
1325 Sized_dynobj<size, big_endian>* dynobj,
1326 const unsigned char* syms,
1327 size_t count,
1328 const char* sym_names,
1329 size_t sym_name_size,
1330 const unsigned char* versym,
1331 size_t versym_size,
92de84a6 1332 const std::vector<const char*>* version_map,
6fa2a40b 1333 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
92de84a6 1334 size_t* defined)
dbe717ef 1335{
92de84a6
ILT
1336 *defined = 0;
1337
8851ecca 1338 gold_assert(size == parameters->target().get_size());
dbe717ef 1339
88dd47ac
ILT
1340 if (dynobj->just_symbols())
1341 {
1342 gold_error(_("--just-symbols does not make sense with a shared object"));
1343 return;
1344 }
1345
dbe717ef
ILT
1346 if (versym != NULL && versym_size / 2 < count)
1347 {
75f2446e
ILT
1348 dynobj->error(_("too few symbol versions"));
1349 return;
dbe717ef
ILT
1350 }
1351
1352 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1353
aeddab66
ILT
1354 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1355 // weak aliases. This is necessary because if the dynamic object
1356 // provides the same variable under two names, one of which is a
1357 // weak definition, and the regular object refers to the weak
1358 // definition, we have to put both the weak definition and the
1359 // strong definition into the dynamic symbol table. Given a weak
1360 // definition, the only way that we can find the corresponding
1361 // strong definition, if any, is to search the symbol table.
1362 std::vector<Sized_symbol<size>*> object_symbols;
1363
dbe717ef
ILT
1364 const unsigned char* p = syms;
1365 const unsigned char* vs = versym;
1366 for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
1367 {
1368 elfcpp::Sym<size, big_endian> sym(p);
1369
92de84a6
ILT
1370 if (sympointers != NULL)
1371 (*sympointers)[i] = NULL;
1372
65778909
ILT
1373 // Ignore symbols with local binding or that have
1374 // internal or hidden visibility.
1375 if (sym.get_st_bind() == elfcpp::STB_LOCAL
1376 || sym.get_st_visibility() == elfcpp::STV_INTERNAL
1377 || sym.get_st_visibility() == elfcpp::STV_HIDDEN)
dbe717ef
ILT
1378 continue;
1379
8bdcdf2c
ILT
1380 // A protected symbol in a shared library must be treated as a
1381 // normal symbol when viewed from outside the shared library.
1382 // Implement this by overriding the visibility here.
1383 elfcpp::Sym<size, big_endian>* psym = &sym;
1384 unsigned char symbuf[sym_size];
1385 elfcpp::Sym<size, big_endian> sym2(symbuf);
1386 if (sym.get_st_visibility() == elfcpp::STV_PROTECTED)
1387 {
1388 memcpy(symbuf, p, sym_size);
1389 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1390 sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis());
1391 psym = &sym2;
1392 }
1393
1394 unsigned int st_name = psym->get_st_name();
dbe717ef
ILT
1395 if (st_name >= sym_name_size)
1396 {
75f2446e
ILT
1397 dynobj->error(_("bad symbol name offset %u at %zu"),
1398 st_name, i);
1399 continue;
dbe717ef
ILT
1400 }
1401
2ea97941 1402 const char* name = sym_names + st_name;
dbe717ef 1403
d491d34e 1404 bool is_ordinary;
8bdcdf2c 1405 unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(),
d491d34e
ILT
1406 &is_ordinary);
1407
92de84a6
ILT
1408 if (st_shndx != elfcpp::SHN_UNDEF)
1409 ++*defined;
1410
aeddab66
ILT
1411 Sized_symbol<size>* res;
1412
dbe717ef
ILT
1413 if (versym == NULL)
1414 {
1415 Stringpool::Key name_key;
2ea97941
ILT
1416 name = this->namepool_.add(name, true, &name_key);
1417 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1418 false, *psym, st_shndx, is_ordinary,
d491d34e 1419 st_shndx);
dbe717ef 1420 }
aeddab66
ILT
1421 else
1422 {
1423 // Read the version information.
dbe717ef 1424
aeddab66 1425 unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
dbe717ef 1426
aeddab66
ILT
1427 bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
1428 v &= elfcpp::VERSYM_VERSION;
dbe717ef 1429
aeddab66
ILT
1430 // The Sun documentation says that V can be VER_NDX_LOCAL,
1431 // or VER_NDX_GLOBAL, or a version index. The meaning of
1432 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1433 // The old GNU linker will happily generate VER_NDX_LOCAL
1434 // for an undefined symbol. I don't know what the Sun
1435 // linker will generate.
dbe717ef 1436
aeddab66 1437 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
d491d34e 1438 && st_shndx != elfcpp::SHN_UNDEF)
aeddab66
ILT
1439 {
1440 // This symbol should not be visible outside the object.
1441 continue;
1442 }
64707334 1443
aeddab66
ILT
1444 // At this point we are definitely going to add this symbol.
1445 Stringpool::Key name_key;
2ea97941 1446 name = this->namepool_.add(name, true, &name_key);
dbe717ef 1447
aeddab66
ILT
1448 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1449 || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
1450 {
1451 // This symbol does not have a version.
2ea97941 1452 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1453 false, *psym, st_shndx, is_ordinary,
d491d34e 1454 st_shndx);
aeddab66
ILT
1455 }
1456 else
1457 {
1458 if (v >= version_map->size())
1459 {
1460 dynobj->error(_("versym for symbol %zu out of range: %u"),
1461 i, v);
1462 continue;
1463 }
dbe717ef 1464
2ea97941
ILT
1465 const char* version = (*version_map)[v];
1466 if (version == NULL)
aeddab66
ILT
1467 {
1468 dynobj->error(_("versym for symbol %zu has no name: %u"),
1469 i, v);
1470 continue;
1471 }
dbe717ef 1472
aeddab66 1473 Stringpool::Key version_key;
2ea97941 1474 version = this->namepool_.add(version, true, &version_key);
aeddab66
ILT
1475
1476 // If this is an absolute symbol, and the version name
1477 // and symbol name are the same, then this is the
1478 // version definition symbol. These symbols exist to
1479 // support using -u to pull in particular versions. We
1480 // do not want to record a version for them.
d491d34e
ILT
1481 if (st_shndx == elfcpp::SHN_ABS
1482 && !is_ordinary
aeddab66 1483 && name_key == version_key)
2ea97941 1484 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1485 false, *psym, st_shndx, is_ordinary,
d491d34e 1486 st_shndx);
aeddab66
ILT
1487 else
1488 {
8781f709
ILT
1489 const bool is_default_version =
1490 !hidden && st_shndx != elfcpp::SHN_UNDEF;
2ea97941 1491 res = this->add_from_object(dynobj, name, name_key, version,
8781f709
ILT
1492 version_key, is_default_version,
1493 *psym, st_shndx,
d491d34e 1494 is_ordinary, st_shndx);
aeddab66
ILT
1495 }
1496 }
dbe717ef
ILT
1497 }
1498
99a37bfd 1499 // Note that it is possible that RES was overridden by an
a4bb589a 1500 // earlier object, in which case it can't be aliased here.
d491d34e
ILT
1501 if (st_shndx != elfcpp::SHN_UNDEF
1502 && is_ordinary
8bdcdf2c 1503 && psym->get_st_type() == elfcpp::STT_OBJECT
99a37bfd
ILT
1504 && res->source() == Symbol::FROM_OBJECT
1505 && res->object() == dynobj)
aeddab66 1506 object_symbols.push_back(res);
92de84a6
ILT
1507
1508 if (sympointers != NULL)
1509 (*sympointers)[i] = res;
aeddab66
ILT
1510 }
1511
1512 this->record_weak_aliases(&object_symbols);
1513}
1514
cdc29364
CC
1515// Add a symbol from a incremental object file.
1516
1517template<int size, bool big_endian>
26d3c67d 1518Sized_symbol<size>*
cdc29364
CC
1519Symbol_table::add_from_incrobj(
1520 Object* obj,
1521 const char* name,
1522 const char* ver,
1523 elfcpp::Sym<size, big_endian>* sym)
1524{
1525 unsigned int st_shndx = sym->get_st_shndx();
1526 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
1527
1528 Stringpool::Key ver_key = 0;
1529 bool is_default_version = false;
1530 bool is_forced_local = false;
1531
1532 Stringpool::Key name_key;
1533 name = this->namepool_.add(name, true, &name_key);
1534
1535 Sized_symbol<size>* res;
1536 res = this->add_from_object(obj, name, name_key, ver, ver_key,
1537 is_default_version, *sym, st_shndx,
1538 is_ordinary, st_shndx);
1539
1540 if (is_forced_local)
1541 this->force_local(res);
1542
1543 return res;
1544}
1545
aeddab66
ILT
1546// This is used to sort weak aliases. We sort them first by section
1547// index, then by offset, then by weak ahead of strong.
1548
1549template<int size>
1550class Weak_alias_sorter
1551{
1552 public:
1553 bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const;
1554};
1555
1556template<int size>
1557bool
1558Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1,
1559 const Sized_symbol<size>* s2) const
1560{
d491d34e
ILT
1561 bool is_ordinary;
1562 unsigned int s1_shndx = s1->shndx(&is_ordinary);
1563 gold_assert(is_ordinary);
1564 unsigned int s2_shndx = s2->shndx(&is_ordinary);
1565 gold_assert(is_ordinary);
1566 if (s1_shndx != s2_shndx)
1567 return s1_shndx < s2_shndx;
1568
aeddab66
ILT
1569 if (s1->value() != s2->value())
1570 return s1->value() < s2->value();
1571 if (s1->binding() != s2->binding())
1572 {
1573 if (s1->binding() == elfcpp::STB_WEAK)
1574 return true;
1575 if (s2->binding() == elfcpp::STB_WEAK)
1576 return false;
1577 }
1578 return std::string(s1->name()) < std::string(s2->name());
1579}
dbe717ef 1580
aeddab66
ILT
1581// SYMBOLS is a list of object symbols from a dynamic object. Look
1582// for any weak aliases, and record them so that if we add the weak
1583// alias to the dynamic symbol table, we also add the corresponding
1584// strong symbol.
dbe717ef 1585
aeddab66
ILT
1586template<int size>
1587void
1588Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols)
1589{
1590 // Sort the vector by section index, then by offset, then by weak
1591 // ahead of strong.
1592 std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>());
1593
1594 // Walk through the vector. For each weak definition, record
1595 // aliases.
1596 for (typename std::vector<Sized_symbol<size>*>::const_iterator p =
1597 symbols->begin();
1598 p != symbols->end();
1599 ++p)
1600 {
1601 if ((*p)->binding() != elfcpp::STB_WEAK)
1602 continue;
1603
1604 // Build a circular list of weak aliases. Each symbol points to
1605 // the next one in the circular list.
1606
1607 Sized_symbol<size>* from_sym = *p;
1608 typename std::vector<Sized_symbol<size>*>::const_iterator q;
1609 for (q = p + 1; q != symbols->end(); ++q)
dbe717ef 1610 {
d491d34e
ILT
1611 bool dummy;
1612 if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy)
aeddab66
ILT
1613 || (*q)->value() != from_sym->value())
1614 break;
1615
1616 this->weak_aliases_[from_sym] = *q;
1617 from_sym->set_has_alias();
1618 from_sym = *q;
dbe717ef
ILT
1619 }
1620
aeddab66
ILT
1621 if (from_sym != *p)
1622 {
1623 this->weak_aliases_[from_sym] = *p;
1624 from_sym->set_has_alias();
1625 }
dbe717ef 1626
aeddab66 1627 p = q - 1;
dbe717ef
ILT
1628 }
1629}
1630
ead1e424
ILT
1631// Create and return a specially defined symbol. If ONLY_IF_REF is
1632// true, then only create the symbol if there is a reference to it.
86f2e683 1633// If this does not return NULL, it sets *POLDSYM to the existing
8c500701
ILT
1634// symbol if there is one. This sets *RESOLVE_OLDSYM if we should
1635// resolve the newly created symbol to the old one. This
1636// canonicalizes *PNAME and *PVERSION.
ead1e424
ILT
1637
1638template<int size, bool big_endian>
1639Sized_symbol<size>*
9b07f471
ILT
1640Symbol_table::define_special_symbol(const char** pname, const char** pversion,
1641 bool only_if_ref,
8c500701 1642 Sized_symbol<size>** poldsym,
ca09d69a 1643 bool* resolve_oldsym)
ead1e424 1644{
8c500701 1645 *resolve_oldsym = false;
ead1e424 1646
55a93433
ILT
1647 // If the caller didn't give us a version, see if we get one from
1648 // the version script.
057ead22 1649 std::string v;
8c500701 1650 bool is_default_version = false;
55a93433
ILT
1651 if (*pversion == NULL)
1652 {
98e090bd
ILT
1653 bool is_global;
1654 if (this->version_script_.get_symbol_version(*pname, &v, &is_global))
057ead22 1655 {
98e090bd
ILT
1656 if (is_global && !v.empty())
1657 {
1658 *pversion = v.c_str();
1659 // If we get the version from a version script, then we
1660 // are also the default version.
1661 is_default_version = true;
1662 }
057ead22 1663 }
55a93433
ILT
1664 }
1665
8c500701
ILT
1666 Symbol* oldsym;
1667 Sized_symbol<size>* sym;
1668
1669 bool add_to_table = false;
1670 typename Symbol_table_type::iterator add_loc = this->table_.end();
1671 bool add_def_to_table = false;
1672 typename Symbol_table_type::iterator add_def_loc = this->table_.end();
1673
ead1e424
ILT
1674 if (only_if_ref)
1675 {
306d9ef0 1676 oldsym = this->lookup(*pname, *pversion);
8c500701
ILT
1677 if (oldsym == NULL && is_default_version)
1678 oldsym = this->lookup(*pname, NULL);
f6ce93d6 1679 if (oldsym == NULL || !oldsym->is_undefined())
ead1e424 1680 return NULL;
306d9ef0
ILT
1681
1682 *pname = oldsym->name();
8c500701
ILT
1683 if (!is_default_version)
1684 *pversion = oldsym->version();
ead1e424
ILT
1685 }
1686 else
1687 {
14b31740 1688 // Canonicalize NAME and VERSION.
f0641a0b 1689 Stringpool::Key name_key;
cfd73a4e 1690 *pname = this->namepool_.add(*pname, true, &name_key);
ead1e424 1691
14b31740 1692 Stringpool::Key version_key = 0;
306d9ef0 1693 if (*pversion != NULL)
cfd73a4e 1694 *pversion = this->namepool_.add(*pversion, true, &version_key);
14b31740 1695
ead1e424 1696 Symbol* const snull = NULL;
ead1e424 1697 std::pair<typename Symbol_table_type::iterator, bool> ins =
14b31740
ILT
1698 this->table_.insert(std::make_pair(std::make_pair(name_key,
1699 version_key),
ead1e424
ILT
1700 snull));
1701
8781f709 1702 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
8c500701
ILT
1703 std::make_pair(this->table_.end(), false);
1704 if (is_default_version)
1705 {
1706 const Stringpool::Key vnull = 0;
8781f709
ILT
1707 insdefault =
1708 this->table_.insert(std::make_pair(std::make_pair(name_key,
1709 vnull),
1710 snull));
8c500701
ILT
1711 }
1712
ead1e424
ILT
1713 if (!ins.second)
1714 {
14b31740 1715 // We already have a symbol table entry for NAME/VERSION.
ead1e424 1716 oldsym = ins.first->second;
a3ad94ed 1717 gold_assert(oldsym != NULL);
8c500701
ILT
1718
1719 if (is_default_version)
1720 {
1721 Sized_symbol<size>* soldsym =
1722 this->get_sized_symbol<size>(oldsym);
1723 this->define_default_version<size, big_endian>(soldsym,
8781f709
ILT
1724 insdefault.second,
1725 insdefault.first);
8c500701 1726 }
ead1e424
ILT
1727 }
1728 else
1729 {
1730 // We haven't seen this symbol before.
a3ad94ed 1731 gold_assert(ins.first->second == NULL);
8c500701
ILT
1732
1733 add_to_table = true;
1734 add_loc = ins.first;
1735
8781f709 1736 if (is_default_version && !insdefault.second)
8c500701
ILT
1737 {
1738 // We are adding NAME/VERSION, and it is the default
1739 // version. We already have an entry for NAME/NULL.
8781f709 1740 oldsym = insdefault.first->second;
8c500701
ILT
1741 *resolve_oldsym = true;
1742 }
1743 else
1744 {
1745 oldsym = NULL;
1746
1747 if (is_default_version)
1748 {
1749 add_def_to_table = true;
8781f709 1750 add_def_loc = insdefault.first;
8c500701
ILT
1751 }
1752 }
ead1e424
ILT
1753 }
1754 }
1755
8851ecca
ILT
1756 const Target& target = parameters->target();
1757 if (!target.has_make_symbol())
86f2e683
ILT
1758 sym = new Sized_symbol<size>();
1759 else
ead1e424 1760 {
029ba973
ILT
1761 Sized_target<size, big_endian>* sized_target =
1762 parameters->sized_target<size, big_endian>();
86f2e683
ILT
1763 sym = sized_target->make_symbol();
1764 if (sym == NULL)
1765 return NULL;
1766 }
ead1e424 1767
86f2e683
ILT
1768 if (add_to_table)
1769 add_loc->second = sym;
1770 else
1771 gold_assert(oldsym != NULL);
ead1e424 1772
8c500701
ILT
1773 if (add_def_to_table)
1774 add_def_loc->second = sym;
1775
7d1a9ebb 1776 *poldsym = this->get_sized_symbol<size>(oldsym);
ead1e424
ILT
1777
1778 return sym;
1779}
1780
1781// Define a symbol based on an Output_data.
1782
14b31740 1783Symbol*
2ea97941
ILT
1784Symbol_table::define_in_output_data(const char* name,
1785 const char* version,
99fff23b 1786 Defined defined,
9b07f471 1787 Output_data* od,
2ea97941
ILT
1788 uint64_t value,
1789 uint64_t symsize,
9b07f471
ILT
1790 elfcpp::STT type,
1791 elfcpp::STB binding,
ead1e424
ILT
1792 elfcpp::STV visibility,
1793 unsigned char nonvis,
2ea97941 1794 bool offset_is_from_end,
ead1e424
ILT
1795 bool only_if_ref)
1796{
8851ecca 1797 if (parameters->target().get_size() == 32)
86f2e683
ILT
1798 {
1799#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1800 return this->do_define_in_output_data<32>(name, version, defined, od,
2ea97941 1801 value, symsize, type, binding,
86f2e683 1802 visibility, nonvis,
2ea97941 1803 offset_is_from_end,
86f2e683
ILT
1804 only_if_ref);
1805#else
1806 gold_unreachable();
1807#endif
1808 }
8851ecca 1809 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1810 {
1811#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1812 return this->do_define_in_output_data<64>(name, version, defined, od,
2ea97941 1813 value, symsize, type, binding,
86f2e683 1814 visibility, nonvis,
2ea97941 1815 offset_is_from_end,
86f2e683
ILT
1816 only_if_ref);
1817#else
1818 gold_unreachable();
1819#endif
1820 }
ead1e424 1821 else
a3ad94ed 1822 gold_unreachable();
ead1e424
ILT
1823}
1824
1825// Define a symbol in an Output_data, sized version.
1826
1827template<int size>
14b31740 1828Sized_symbol<size>*
ead1e424 1829Symbol_table::do_define_in_output_data(
2ea97941
ILT
1830 const char* name,
1831 const char* version,
99fff23b 1832 Defined defined,
ead1e424 1833 Output_data* od,
2ea97941
ILT
1834 typename elfcpp::Elf_types<size>::Elf_Addr value,
1835 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1836 elfcpp::STT type,
1837 elfcpp::STB binding,
1838 elfcpp::STV visibility,
1839 unsigned char nonvis,
2ea97941 1840 bool offset_is_from_end,
ead1e424
ILT
1841 bool only_if_ref)
1842{
1843 Sized_symbol<size>* sym;
86f2e683 1844 Sized_symbol<size>* oldsym;
8c500701 1845 bool resolve_oldsym;
ead1e424 1846
8851ecca 1847 if (parameters->target().is_big_endian())
193a53d9
ILT
1848 {
1849#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 1850 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
1851 only_if_ref, &oldsym,
1852 &resolve_oldsym);
193a53d9
ILT
1853#else
1854 gold_unreachable();
1855#endif
1856 }
ead1e424 1857 else
193a53d9
ILT
1858 {
1859#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 1860 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
1861 only_if_ref, &oldsym,
1862 &resolve_oldsym);
193a53d9
ILT
1863#else
1864 gold_unreachable();
1865#endif
1866 }
ead1e424
ILT
1867
1868 if (sym == NULL)
14b31740 1869 return NULL;
ead1e424 1870
2ea97941 1871 sym->init_output_data(name, version, od, value, symsize, type, binding,
5146f448
CC
1872 visibility, nonvis, offset_is_from_end,
1873 defined == PREDEFINED);
14b31740 1874
e5756efb 1875 if (oldsym == NULL)
55a93433
ILT
1876 {
1877 if (binding == elfcpp::STB_LOCAL
2ea97941 1878 || this->version_script_.symbol_is_local(name))
55a93433 1879 this->force_local(sym);
2ea97941 1880 else if (version != NULL)
75517b77 1881 sym->set_is_default();
55a93433
ILT
1882 return sym;
1883 }
86f2e683 1884
99fff23b 1885 if (Symbol_table::should_override_with_special(oldsym, defined))
e5756efb 1886 this->override_with_special(oldsym, sym);
8c500701
ILT
1887
1888 if (resolve_oldsym)
1889 return sym;
1890 else
1891 {
1892 delete sym;
1893 return oldsym;
1894 }
ead1e424
ILT
1895}
1896
1897// Define a symbol based on an Output_segment.
1898
14b31740 1899Symbol*
2ea97941 1900Symbol_table::define_in_output_segment(const char* name,
99fff23b
ILT
1901 const char* version,
1902 Defined defined,
1903 Output_segment* os,
2ea97941
ILT
1904 uint64_t value,
1905 uint64_t symsize,
9b07f471
ILT
1906 elfcpp::STT type,
1907 elfcpp::STB binding,
ead1e424
ILT
1908 elfcpp::STV visibility,
1909 unsigned char nonvis,
2ea97941 1910 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1911 bool only_if_ref)
1912{
8851ecca 1913 if (parameters->target().get_size() == 32)
86f2e683
ILT
1914 {
1915#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1916 return this->do_define_in_output_segment<32>(name, version, defined, os,
2ea97941 1917 value, symsize, type,
86f2e683 1918 binding, visibility, nonvis,
2ea97941 1919 offset_base, only_if_ref);
86f2e683
ILT
1920#else
1921 gold_unreachable();
1922#endif
1923 }
8851ecca 1924 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1925 {
1926#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1927 return this->do_define_in_output_segment<64>(name, version, defined, os,
2ea97941 1928 value, symsize, type,
86f2e683 1929 binding, visibility, nonvis,
2ea97941 1930 offset_base, only_if_ref);
86f2e683
ILT
1931#else
1932 gold_unreachable();
1933#endif
1934 }
ead1e424 1935 else
a3ad94ed 1936 gold_unreachable();
ead1e424
ILT
1937}
1938
1939// Define a symbol in an Output_segment, sized version.
1940
1941template<int size>
14b31740 1942Sized_symbol<size>*
ead1e424 1943Symbol_table::do_define_in_output_segment(
2ea97941
ILT
1944 const char* name,
1945 const char* version,
99fff23b 1946 Defined defined,
ead1e424 1947 Output_segment* os,
2ea97941
ILT
1948 typename elfcpp::Elf_types<size>::Elf_Addr value,
1949 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1950 elfcpp::STT type,
1951 elfcpp::STB binding,
1952 elfcpp::STV visibility,
1953 unsigned char nonvis,
2ea97941 1954 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1955 bool only_if_ref)
1956{
1957 Sized_symbol<size>* sym;
86f2e683 1958 Sized_symbol<size>* oldsym;
8c500701 1959 bool resolve_oldsym;
ead1e424 1960
8851ecca 1961 if (parameters->target().is_big_endian())
9025d29d
ILT
1962 {
1963#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 1964 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
1965 only_if_ref, &oldsym,
1966 &resolve_oldsym);
9025d29d
ILT
1967#else
1968 gold_unreachable();
1969#endif
1970 }
ead1e424 1971 else
9025d29d
ILT
1972 {
1973#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 1974 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
1975 only_if_ref, &oldsym,
1976 &resolve_oldsym);
9025d29d
ILT
1977#else
1978 gold_unreachable();
1979#endif
1980 }
ead1e424
ILT
1981
1982 if (sym == NULL)
14b31740 1983 return NULL;
ead1e424 1984
2ea97941 1985 sym->init_output_segment(name, version, os, value, symsize, type, binding,
5146f448
CC
1986 visibility, nonvis, offset_base,
1987 defined == PREDEFINED);
14b31740 1988
e5756efb 1989 if (oldsym == NULL)
55a93433
ILT
1990 {
1991 if (binding == elfcpp::STB_LOCAL
2ea97941 1992 || this->version_script_.symbol_is_local(name))
55a93433 1993 this->force_local(sym);
2ea97941 1994 else if (version != NULL)
75517b77 1995 sym->set_is_default();
55a93433
ILT
1996 return sym;
1997 }
86f2e683 1998
99fff23b 1999 if (Symbol_table::should_override_with_special(oldsym, defined))
e5756efb 2000 this->override_with_special(oldsym, sym);
8c500701
ILT
2001
2002 if (resolve_oldsym)
2003 return sym;
2004 else
2005 {
2006 delete sym;
2007 return oldsym;
2008 }
ead1e424
ILT
2009}
2010
2011// Define a special symbol with a constant value. It is a multiple
2012// definition error if this symbol is already defined.
2013
14b31740 2014Symbol*
2ea97941
ILT
2015Symbol_table::define_as_constant(const char* name,
2016 const char* version,
99fff23b 2017 Defined defined,
2ea97941
ILT
2018 uint64_t value,
2019 uint64_t symsize,
9b07f471
ILT
2020 elfcpp::STT type,
2021 elfcpp::STB binding,
2022 elfcpp::STV visibility,
2023 unsigned char nonvis,
caa9d5d9
ILT
2024 bool only_if_ref,
2025 bool force_override)
ead1e424 2026{
8851ecca 2027 if (parameters->target().get_size() == 32)
86f2e683
ILT
2028 {
2029#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 2030 return this->do_define_as_constant<32>(name, version, defined, value,
2ea97941 2031 symsize, type, binding,
caa9d5d9
ILT
2032 visibility, nonvis, only_if_ref,
2033 force_override);
86f2e683
ILT
2034#else
2035 gold_unreachable();
2036#endif
2037 }
8851ecca 2038 else if (parameters->target().get_size() == 64)
86f2e683
ILT
2039 {
2040#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 2041 return this->do_define_as_constant<64>(name, version, defined, value,
2ea97941 2042 symsize, type, binding,
caa9d5d9
ILT
2043 visibility, nonvis, only_if_ref,
2044 force_override);
86f2e683
ILT
2045#else
2046 gold_unreachable();
2047#endif
2048 }
ead1e424 2049 else
a3ad94ed 2050 gold_unreachable();
ead1e424
ILT
2051}
2052
2053// Define a symbol as a constant, sized version.
2054
2055template<int size>
14b31740 2056Sized_symbol<size>*
ead1e424 2057Symbol_table::do_define_as_constant(
2ea97941
ILT
2058 const char* name,
2059 const char* version,
99fff23b 2060 Defined defined,
2ea97941
ILT
2061 typename elfcpp::Elf_types<size>::Elf_Addr value,
2062 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
2063 elfcpp::STT type,
2064 elfcpp::STB binding,
2065 elfcpp::STV visibility,
2066 unsigned char nonvis,
caa9d5d9
ILT
2067 bool only_if_ref,
2068 bool force_override)
ead1e424
ILT
2069{
2070 Sized_symbol<size>* sym;
86f2e683 2071 Sized_symbol<size>* oldsym;
8c500701 2072 bool resolve_oldsym;
ead1e424 2073
8851ecca 2074 if (parameters->target().is_big_endian())
9025d29d
ILT
2075 {
2076#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 2077 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
2078 only_if_ref, &oldsym,
2079 &resolve_oldsym);
9025d29d
ILT
2080#else
2081 gold_unreachable();
2082#endif
2083 }
ead1e424 2084 else
9025d29d
ILT
2085 {
2086#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 2087 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
2088 only_if_ref, &oldsym,
2089 &resolve_oldsym);
9025d29d
ILT
2090#else
2091 gold_unreachable();
2092#endif
2093 }
ead1e424
ILT
2094
2095 if (sym == NULL)
14b31740 2096 return NULL;
ead1e424 2097
2ea97941 2098 sym->init_constant(name, version, value, symsize, type, binding, visibility,
5146f448 2099 nonvis, defined == PREDEFINED);
14b31740 2100
e5756efb 2101 if (oldsym == NULL)
55a93433 2102 {
686c8caf
ILT
2103 // Version symbols are absolute symbols with name == version.
2104 // We don't want to force them to be local.
2ea97941
ILT
2105 if ((version == NULL
2106 || name != version
2107 || value != 0)
686c8caf 2108 && (binding == elfcpp::STB_LOCAL
2ea97941 2109 || this->version_script_.symbol_is_local(name)))
55a93433 2110 this->force_local(sym);
2ea97941
ILT
2111 else if (version != NULL
2112 && (name != version || value != 0))
75517b77 2113 sym->set_is_default();
55a93433
ILT
2114 return sym;
2115 }
86f2e683 2116
99fff23b
ILT
2117 if (force_override
2118 || Symbol_table::should_override_with_special(oldsym, defined))
e5756efb 2119 this->override_with_special(oldsym, sym);
8c500701
ILT
2120
2121 if (resolve_oldsym)
2122 return sym;
2123 else
2124 {
2125 delete sym;
2126 return oldsym;
2127 }
ead1e424
ILT
2128}
2129
2130// Define a set of symbols in output sections.
2131
2132void
9b07f471 2133Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2134 const Define_symbol_in_section* p,
2135 bool only_if_ref)
ead1e424
ILT
2136{
2137 for (int i = 0; i < count; ++i, ++p)
2138 {
2139 Output_section* os = layout->find_output_section(p->output_section);
2140 if (os != NULL)
99fff23b 2141 this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2142 p->size, p->type, p->binding,
2143 p->visibility, p->nonvis,
a445fddf
ILT
2144 p->offset_is_from_end,
2145 only_if_ref || p->only_if_ref);
ead1e424 2146 else
99fff23b
ILT
2147 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2148 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2149 only_if_ref || p->only_if_ref,
2150 false);
ead1e424
ILT
2151 }
2152}
2153
2154// Define a set of symbols in output segments.
2155
2156void
9b07f471 2157Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2158 const Define_symbol_in_segment* p,
2159 bool only_if_ref)
ead1e424
ILT
2160{
2161 for (int i = 0; i < count; ++i, ++p)
2162 {
2163 Output_segment* os = layout->find_output_segment(p->segment_type,
2164 p->segment_flags_set,
2165 p->segment_flags_clear);
2166 if (os != NULL)
99fff23b 2167 this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2168 p->size, p->type, p->binding,
2169 p->visibility, p->nonvis,
a445fddf
ILT
2170 p->offset_base,
2171 only_if_ref || p->only_if_ref);
ead1e424 2172 else
99fff23b
ILT
2173 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2174 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2175 only_if_ref || p->only_if_ref,
2176 false);
ead1e424
ILT
2177 }
2178}
2179
46fe1623
ILT
2180// Define CSYM using a COPY reloc. POSD is the Output_data where the
2181// symbol should be defined--typically a .dyn.bss section. VALUE is
2182// the offset within POSD.
2183
2184template<int size>
2185void
fe8718a4 2186Symbol_table::define_with_copy_reloc(
fe8718a4
ILT
2187 Sized_symbol<size>* csym,
2188 Output_data* posd,
2ea97941 2189 typename elfcpp::Elf_types<size>::Elf_Addr value)
46fe1623
ILT
2190{
2191 gold_assert(csym->is_from_dynobj());
2192 gold_assert(!csym->is_copied_from_dynobj());
2ea97941
ILT
2193 Object* object = csym->object();
2194 gold_assert(object->is_dynamic());
2195 Dynobj* dynobj = static_cast<Dynobj*>(object);
46fe1623
ILT
2196
2197 // Our copied variable has to override any variable in a shared
2198 // library.
2199 elfcpp::STB binding = csym->binding();
2200 if (binding == elfcpp::STB_WEAK)
2201 binding = elfcpp::STB_GLOBAL;
2202
99fff23b 2203 this->define_in_output_data(csym->name(), csym->version(), COPY,
2ea97941 2204 posd, value, csym->symsize(),
46fe1623
ILT
2205 csym->type(), binding,
2206 csym->visibility(), csym->nonvis(),
2207 false, false);
2208
2209 csym->set_is_copied_from_dynobj();
2210 csym->set_needs_dynsym_entry();
2211
2212 this->copied_symbol_dynobjs_[csym] = dynobj;
2213
2214 // We have now defined all aliases, but we have not entered them all
2215 // in the copied_symbol_dynobjs_ map.
2216 if (csym->has_alias())
2217 {
2218 Symbol* sym = csym;
2219 while (true)
2220 {
2221 sym = this->weak_aliases_[sym];
2222 if (sym == csym)
2223 break;
2224 gold_assert(sym->output_data() == posd);
2225
2226 sym->set_is_copied_from_dynobj();
2227 this->copied_symbol_dynobjs_[sym] = dynobj;
2228 }
2229 }
2230}
2231
2232// SYM is defined using a COPY reloc. Return the dynamic object where
2233// the original definition was found.
2234
2235Dynobj*
2236Symbol_table::get_copy_source(const Symbol* sym) const
2237{
2238 gold_assert(sym->is_copied_from_dynobj());
2239 Copied_symbol_dynobjs::const_iterator p =
2240 this->copied_symbol_dynobjs_.find(sym);
2241 gold_assert(p != this->copied_symbol_dynobjs_.end());
2242 return p->second;
2243}
2244
f3e9c5c5
ILT
2245// Add any undefined symbols named on the command line.
2246
2247void
88a4108b 2248Symbol_table::add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5 2249{
88a4108b
ILT
2250 if (parameters->options().any_undefined()
2251 || layout->script_options()->any_unreferenced())
f3e9c5c5
ILT
2252 {
2253 if (parameters->target().get_size() == 32)
2254 {
5adf9721 2255#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
88a4108b 2256 this->do_add_undefined_symbols_from_command_line<32>(layout);
f3e9c5c5
ILT
2257#else
2258 gold_unreachable();
2259#endif
2260 }
2261 else if (parameters->target().get_size() == 64)
2262 {
2263#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
88a4108b 2264 this->do_add_undefined_symbols_from_command_line<64>(layout);
f3e9c5c5
ILT
2265#else
2266 gold_unreachable();
2267#endif
2268 }
2269 else
2270 gold_unreachable();
2271 }
2272}
2273
2274template<int size>
2275void
88a4108b 2276Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5
ILT
2277{
2278 for (options::String_set::const_iterator p =
2279 parameters->options().undefined_begin();
2280 p != parameters->options().undefined_end();
2281 ++p)
88a4108b 2282 this->add_undefined_symbol_from_command_line<size>(p->c_str());
f3e9c5c5 2283
88a4108b
ILT
2284 for (Script_options::referenced_const_iterator p =
2285 layout->script_options()->referenced_begin();
2286 p != layout->script_options()->referenced_end();
2287 ++p)
2288 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2289}
2290
2291template<int size>
2292void
2293Symbol_table::add_undefined_symbol_from_command_line(const char* name)
2294{
2295 if (this->lookup(name) != NULL)
2296 return;
f3e9c5c5 2297
88a4108b 2298 const char* version = NULL;
f3e9c5c5 2299
88a4108b
ILT
2300 Sized_symbol<size>* sym;
2301 Sized_symbol<size>* oldsym;
2302 bool resolve_oldsym;
2303 if (parameters->target().is_big_endian())
2304 {
f3e9c5c5 2305#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
88a4108b
ILT
2306 sym = this->define_special_symbol<size, true>(&name, &version,
2307 false, &oldsym,
2308 &resolve_oldsym);
f3e9c5c5 2309#else
88a4108b 2310 gold_unreachable();
f3e9c5c5 2311#endif
88a4108b
ILT
2312 }
2313 else
2314 {
f3e9c5c5 2315#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
88a4108b
ILT
2316 sym = this->define_special_symbol<size, false>(&name, &version,
2317 false, &oldsym,
2318 &resolve_oldsym);
f3e9c5c5 2319#else
88a4108b 2320 gold_unreachable();
f3e9c5c5 2321#endif
88a4108b 2322 }
f3e9c5c5 2323
88a4108b 2324 gold_assert(oldsym == NULL);
f3e9c5c5 2325
88a4108b
ILT
2326 sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
2327 elfcpp::STV_DEFAULT, 0);
2328 ++this->saw_undefined_;
f3e9c5c5
ILT
2329}
2330
a3ad94ed
ILT
2331// Set the dynamic symbol indexes. INDEX is the index of the first
2332// global dynamic symbol. Pointers to the symbols are stored into the
2333// vector SYMS. The names are added to DYNPOOL. This returns an
2334// updated dynamic symbol index.
2335
2336unsigned int
9b07f471 2337Symbol_table::set_dynsym_indexes(unsigned int index,
a3ad94ed 2338 std::vector<Symbol*>* syms,
14b31740
ILT
2339 Stringpool* dynpool,
2340 Versions* versions)
a3ad94ed
ILT
2341{
2342 for (Symbol_table_type::iterator p = this->table_.begin();
2343 p != this->table_.end();
2344 ++p)
2345 {
2346 Symbol* sym = p->second;
16649710
ILT
2347
2348 // Note that SYM may already have a dynamic symbol index, since
2349 // some symbols appear more than once in the symbol table, with
2350 // and without a version.
2351
ce97fa81 2352 if (!sym->should_add_dynsym_entry(this))
16649710
ILT
2353 sym->set_dynsym_index(-1U);
2354 else if (!sym->has_dynsym_index())
a3ad94ed
ILT
2355 {
2356 sym->set_dynsym_index(index);
2357 ++index;
2358 syms->push_back(sym);
cfd73a4e 2359 dynpool->add(sym->name(), false, NULL);
14b31740
ILT
2360
2361 // Record any version information.
09124467
ILT
2362 if (sym->version() != NULL)
2363 versions->record_version(this, dynpool, sym);
594c8e5e
ILT
2364
2365 // If the symbol is defined in a dynamic object and is
2366 // referenced in a regular object, then mark the dynamic
2367 // object as needed. This is used to implement --as-needed.
2368 if (sym->is_from_dynobj() && sym->in_reg())
2369 sym->object()->set_is_needed();
a3ad94ed
ILT
2370 }
2371 }
2372
14b31740
ILT
2373 // Finish up the versions. In some cases this may add new dynamic
2374 // symbols.
9b07f471 2375 index = versions->finalize(this, index, syms);
14b31740 2376
a3ad94ed
ILT
2377 return index;
2378}
2379
c06b7b0b 2380// Set the final values for all the symbols. The index of the first
55a93433
ILT
2381// global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
2382// file offset OFF. Add their names to POOL. Return the new file
2383// offset. Update *PLOCAL_SYMCOUNT if necessary.
54dc6425 2384
75f65a3e 2385off_t
55a93433
ILT
2386Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
2387 size_t dyncount, Stringpool* pool,
ca09d69a 2388 unsigned int* plocal_symcount)
54dc6425 2389{
f6ce93d6
ILT
2390 off_t ret;
2391
55a93433
ILT
2392 gold_assert(*plocal_symcount != 0);
2393 this->first_global_index_ = *plocal_symcount;
c06b7b0b 2394
16649710
ILT
2395 this->dynamic_offset_ = dynoff;
2396 this->first_dynamic_global_index_ = dyn_global_index;
2397 this->dynamic_count_ = dyncount;
2398
8851ecca 2399 if (parameters->target().get_size() == 32)
9025d29d
ILT
2400 {
2401#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
55a93433 2402 ret = this->sized_finalize<32>(off, pool, plocal_symcount);
9025d29d
ILT
2403#else
2404 gold_unreachable();
2405#endif
2406 }
8851ecca 2407 else if (parameters->target().get_size() == 64)
9025d29d
ILT
2408 {
2409#if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
55a93433 2410 ret = this->sized_finalize<64>(off, pool, plocal_symcount);
9025d29d
ILT
2411#else
2412 gold_unreachable();
2413#endif
2414 }
61ba1cf9 2415 else
a3ad94ed 2416 gold_unreachable();
f6ce93d6
ILT
2417
2418 // Now that we have the final symbol table, we can reliably note
2419 // which symbols should get warnings.
cb295612 2420 this->warnings_.note_warnings(this);
f6ce93d6
ILT
2421
2422 return ret;
75f65a3e
ILT
2423}
2424
55a93433
ILT
2425// SYM is going into the symbol table at *PINDEX. Add the name to
2426// POOL, update *PINDEX and *POFF.
2427
2428template<int size>
2429void
2430Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool,
2431 unsigned int* pindex, off_t* poff)
2432{
2433 sym->set_symtab_index(*pindex);
6d1c4efb
ILT
2434 if (sym->version() == NULL || !parameters->options().relocatable())
2435 pool->add(sym->name(), false, NULL);
2436 else
2437 pool->add(sym->versioned_name(), true, NULL);
55a93433
ILT
2438 ++*pindex;
2439 *poff += elfcpp::Elf_sizes<size>::sym_size;
2440}
2441
ead1e424
ILT
2442// Set the final value for all the symbols. This is called after
2443// Layout::finalize, so all the output sections have their final
2444// address.
75f65a3e
ILT
2445
2446template<int size>
2447off_t
55a93433
ILT
2448Symbol_table::sized_finalize(off_t off, Stringpool* pool,
2449 unsigned int* plocal_symcount)
75f65a3e 2450{
ead1e424 2451 off = align_address(off, size >> 3);
75f65a3e
ILT
2452 this->offset_ = off;
2453
55a93433
ILT
2454 unsigned int index = *plocal_symcount;
2455 const unsigned int orig_index = index;
c06b7b0b 2456
55a93433
ILT
2457 // First do all the symbols which have been forced to be local, as
2458 // they must appear before all global symbols.
2459 for (Forced_locals::iterator p = this->forced_locals_.begin();
2460 p != this->forced_locals_.end();
2461 ++p)
2462 {
2463 Symbol* sym = *p;
2464 gold_assert(sym->is_forced_local());
2465 if (this->sized_finalize_symbol<size>(sym))
2466 {
2467 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2468 ++*plocal_symcount;
2469 }
2470 }
2471
2472 // Now do all the remaining symbols.
c06b7b0b
ILT
2473 for (Symbol_table_type::iterator p = this->table_.begin();
2474 p != this->table_.end();
2475 ++p)
54dc6425 2476 {
55a93433
ILT
2477 Symbol* sym = p->second;
2478 if (this->sized_finalize_symbol<size>(sym))
2479 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2480 }
54dc6425 2481
55a93433 2482 this->output_count_ = index - orig_index;
a3ad94ed 2483
55a93433
ILT
2484 return off;
2485}
75f65a3e 2486
c0a62865
DK
2487// Compute the final value of SYM and store status in location PSTATUS.
2488// During relaxation, this may be called multiple times for a symbol to
2489// compute its would-be final value in each relaxation pass.
008db82e 2490
55a93433 2491template<int size>
c0a62865
DK
2492typename Sized_symbol<size>::Value_type
2493Symbol_table::compute_final_value(
2494 const Sized_symbol<size>* sym,
2495 Compute_final_value_status* pstatus) const
55a93433 2496{
ef9beddf 2497 typedef typename Sized_symbol<size>::Value_type Value_type;
2ea97941 2498 Value_type value;
ead1e424 2499
55a93433
ILT
2500 switch (sym->source())
2501 {
2502 case Symbol::FROM_OBJECT:
2503 {
d491d34e 2504 bool is_ordinary;
2ea97941 2505 unsigned int shndx = sym->shndx(&is_ordinary);
ead1e424 2506
d491d34e 2507 if (!is_ordinary
2ea97941
ILT
2508 && shndx != elfcpp::SHN_ABS
2509 && !Symbol::is_common_shndx(shndx))
55a93433 2510 {
c0a62865
DK
2511 *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION;
2512 return 0;
ead1e424 2513 }
ead1e424 2514
55a93433
ILT
2515 Object* symobj = sym->object();
2516 if (symobj->is_dynamic())
ead1e424 2517 {
2ea97941
ILT
2518 value = 0;
2519 shndx = elfcpp::SHN_UNDEF;
ead1e424 2520 }
89fc3421
CC
2521 else if (symobj->pluginobj() != NULL)
2522 {
2ea97941
ILT
2523 value = 0;
2524 shndx = elfcpp::SHN_UNDEF;
89fc3421 2525 }
2ea97941
ILT
2526 else if (shndx == elfcpp::SHN_UNDEF)
2527 value = 0;
d491d34e 2528 else if (!is_ordinary
2ea97941
ILT
2529 && (shndx == elfcpp::SHN_ABS
2530 || Symbol::is_common_shndx(shndx)))
2531 value = sym->value();
55a93433 2532 else
ead1e424 2533 {
55a93433 2534 Relobj* relobj = static_cast<Relobj*>(symobj);
2ea97941 2535 Output_section* os = relobj->output_section(shndx);
55a93433 2536
2ea97941 2537 if (this->is_section_folded(relobj, shndx))
ef15dade
ST
2538 {
2539 gold_assert(os == NULL);
2540 // Get the os of the section it is folded onto.
2541 Section_id folded = this->icf_->get_folded_section(relobj,
2ea97941 2542 shndx);
ef15dade
ST
2543 gold_assert(folded.first != NULL);
2544 Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first);
d6344fb5
DK
2545 unsigned folded_shndx = folded.second;
2546
2547 os = folded_obj->output_section(folded_shndx);
ef15dade 2548 gold_assert(os != NULL);
d6344fb5
DK
2549
2550 // Replace (relobj, shndx) with canonical ICF input section.
2551 shndx = folded_shndx;
2552 relobj = folded_obj;
ef15dade
ST
2553 }
2554
d6344fb5 2555 uint64_t secoff64 = relobj->output_section_offset(shndx);
ef15dade 2556 if (os == NULL)
ead1e424 2557 {
6d03d481
ST
2558 bool static_or_reloc = (parameters->doing_static_link() ||
2559 parameters->options().relocatable());
2560 gold_assert(static_or_reloc || sym->dynsym_index() == -1U);
2561
c0a62865
DK
2562 *pstatus = CFVS_NO_OUTPUT_SECTION;
2563 return 0;
ead1e424 2564 }
55a93433 2565
eff45813
CC
2566 if (secoff64 == -1ULL)
2567 {
2568 // The section needs special handling (e.g., a merge section).
ef15dade 2569
2ea97941 2570 value = os->output_address(relobj, shndx, sym->value());
eff45813
CC
2571 }
2572 else
2573 {
2574 Value_type secoff =
2575 convert_types<Value_type, uint64_t>(secoff64);
2576 if (sym->type() == elfcpp::STT_TLS)
2ea97941 2577 value = sym->value() + os->tls_offset() + secoff;
eff45813 2578 else
2ea97941 2579 value = sym->value() + os->address() + secoff;
eff45813 2580 }
ead1e424 2581 }
55a93433
ILT
2582 }
2583 break;
2584
2585 case Symbol::IN_OUTPUT_DATA:
2586 {
2587 Output_data* od = sym->output_data();
2ea97941 2588 value = sym->value();
155a0dd7 2589 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2590 value += od->address();
155a0dd7
ILT
2591 else
2592 {
2593 Output_section* os = od->output_section();
2594 gold_assert(os != NULL);
2ea97941 2595 value += os->tls_offset() + (od->address() - os->address());
155a0dd7 2596 }
55a93433 2597 if (sym->offset_is_from_end())
2ea97941 2598 value += od->data_size();
55a93433
ILT
2599 }
2600 break;
2601
2602 case Symbol::IN_OUTPUT_SEGMENT:
2603 {
2604 Output_segment* os = sym->output_segment();
2ea97941 2605 value = sym->value();
edfbb029 2606 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2607 value += os->vaddr();
55a93433
ILT
2608 switch (sym->offset_base())
2609 {
2610 case Symbol::SEGMENT_START:
2611 break;
2612 case Symbol::SEGMENT_END:
2ea97941 2613 value += os->memsz();
55a93433
ILT
2614 break;
2615 case Symbol::SEGMENT_BSS:
2ea97941 2616 value += os->filesz();
55a93433
ILT
2617 break;
2618 default:
2619 gold_unreachable();
2620 }
2621 }
2622 break;
ead1e424 2623
f3e9c5c5 2624 case Symbol::IS_CONSTANT:
2ea97941 2625 value = sym->value();
55a93433 2626 break;
ead1e424 2627
f3e9c5c5 2628 case Symbol::IS_UNDEFINED:
2ea97941 2629 value = 0;
f3e9c5c5
ILT
2630 break;
2631
55a93433
ILT
2632 default:
2633 gold_unreachable();
2634 }
ead1e424 2635
c0a62865 2636 *pstatus = CFVS_OK;
2ea97941 2637 return value;
c0a62865
DK
2638}
2639
2640// Finalize the symbol SYM. This returns true if the symbol should be
2641// added to the symbol table, false otherwise.
2642
2643template<int size>
2644bool
2645Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
2646{
2647 typedef typename Sized_symbol<size>::Value_type Value_type;
2648
2649 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
2650
2651 // The default version of a symbol may appear twice in the symbol
2652 // table. We only need to finalize it once.
2653 if (sym->has_symtab_index())
2654 return false;
2655
2656 if (!sym->in_reg())
2657 {
2658 gold_assert(!sym->has_symtab_index());
2659 sym->set_symtab_index(-1U);
2660 gold_assert(sym->dynsym_index() == -1U);
2661 return false;
2662 }
2663
badc8139
RÁE
2664 // If the symbol is only present on plugin files, the plugin decided we
2665 // don't need it.
2666 if (!sym->in_real_elf())
2667 {
2668 gold_assert(!sym->has_symtab_index());
2669 sym->set_symtab_index(-1U);
2670 return false;
2671 }
2672
c0a62865
DK
2673 // Compute final symbol value.
2674 Compute_final_value_status status;
2ea97941 2675 Value_type value = this->compute_final_value(sym, &status);
c0a62865
DK
2676
2677 switch (status)
2678 {
2679 case CFVS_OK:
2680 break;
2681 case CFVS_UNSUPPORTED_SYMBOL_SECTION:
2682 {
2683 bool is_ordinary;
2ea97941 2684 unsigned int shndx = sym->shndx(&is_ordinary);
c0a62865 2685 gold_error(_("%s: unsupported symbol section 0x%x"),
2ea97941 2686 sym->demangled_name().c_str(), shndx);
c0a62865
DK
2687 }
2688 break;
2689 case CFVS_NO_OUTPUT_SECTION:
2690 sym->set_symtab_index(-1U);
2691 return false;
2692 default:
2693 gold_unreachable();
2694 }
2695
2ea97941 2696 sym->set_value(value);
9e2dcb77 2697
8c604651
CS
2698 if (parameters->options().strip_all()
2699 || !parameters->options().should_retain_symbol(sym->name()))
55a93433
ILT
2700 {
2701 sym->set_symtab_index(-1U);
2702 return false;
54dc6425 2703 }
75f65a3e 2704
55a93433 2705 return true;
54dc6425
ILT
2706}
2707
61ba1cf9
ILT
2708// Write out the global symbols.
2709
2710void
fd9d194f 2711Symbol_table::write_globals(const Stringpool* sympool,
d491d34e
ILT
2712 const Stringpool* dynpool,
2713 Output_symtab_xindex* symtab_xindex,
2714 Output_symtab_xindex* dynsym_xindex,
2715 Output_file* of) const
61ba1cf9 2716{
8851ecca 2717 switch (parameters->size_and_endianness())
61ba1cf9 2718 {
9025d29d 2719#ifdef HAVE_TARGET_32_LITTLE
8851ecca 2720 case Parameters::TARGET_32_LITTLE:
fd9d194f 2721 this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex,
d491d34e 2722 dynsym_xindex, of);
8851ecca 2723 break;
9025d29d 2724#endif
8851ecca
ILT
2725#ifdef HAVE_TARGET_32_BIG
2726 case Parameters::TARGET_32_BIG:
fd9d194f 2727 this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex,
d491d34e 2728 dynsym_xindex, of);
8851ecca 2729 break;
9025d29d 2730#endif
9025d29d 2731#ifdef HAVE_TARGET_64_LITTLE
8851ecca 2732 case Parameters::TARGET_64_LITTLE:
fd9d194f 2733 this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex,
d491d34e 2734 dynsym_xindex, of);
8851ecca 2735 break;
9025d29d 2736#endif
8851ecca
ILT
2737#ifdef HAVE_TARGET_64_BIG
2738 case Parameters::TARGET_64_BIG:
fd9d194f 2739 this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex,
d491d34e 2740 dynsym_xindex, of);
8851ecca
ILT
2741 break;
2742#endif
2743 default:
2744 gold_unreachable();
61ba1cf9 2745 }
61ba1cf9
ILT
2746}
2747
2748// Write out the global symbols.
2749
2750template<int size, bool big_endian>
2751void
fd9d194f 2752Symbol_table::sized_write_globals(const Stringpool* sympool,
16649710 2753 const Stringpool* dynpool,
d491d34e
ILT
2754 Output_symtab_xindex* symtab_xindex,
2755 Output_symtab_xindex* dynsym_xindex,
61ba1cf9
ILT
2756 Output_file* of) const
2757{
8851ecca 2758 const Target& target = parameters->target();
9a2d6984 2759
61ba1cf9 2760 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
55a93433
ILT
2761
2762 const unsigned int output_count = this->output_count_;
2763 const section_size_type oview_size = output_count * sym_size;
2764 const unsigned int first_global_index = this->first_global_index_;
5fe2a0f5
ILT
2765 unsigned char* psyms;
2766 if (this->offset_ == 0 || output_count == 0)
2767 psyms = NULL;
2768 else
2769 psyms = of->get_output_view(this->offset_, oview_size);
16649710 2770
55a93433
ILT
2771 const unsigned int dynamic_count = this->dynamic_count_;
2772 const section_size_type dynamic_size = dynamic_count * sym_size;
2773 const unsigned int first_dynamic_global_index =
2774 this->first_dynamic_global_index_;
16649710 2775 unsigned char* dynamic_view;
5fe2a0f5 2776 if (this->dynamic_offset_ == 0 || dynamic_count == 0)
16649710
ILT
2777 dynamic_view = NULL;
2778 else
2779 dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
c06b7b0b 2780
61ba1cf9
ILT
2781 for (Symbol_table_type::const_iterator p = this->table_.begin();
2782 p != this->table_.end();
2783 ++p)
2784 {
2785 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
2786
9a2d6984 2787 // Possibly warn about unresolved symbols in shared libraries.
fd9d194f 2788 this->warn_about_undefined_dynobj_symbol(sym);
e2827e5f 2789
a3ad94ed 2790 unsigned int sym_index = sym->symtab_index();
16649710
ILT
2791 unsigned int dynsym_index;
2792 if (dynamic_view == NULL)
2793 dynsym_index = -1U;
2794 else
2795 dynsym_index = sym->dynsym_index();
2796
2797 if (sym_index == -1U && dynsym_index == -1U)
a3ad94ed
ILT
2798 {
2799 // This symbol is not included in the output file.
2800 continue;
2801 }
16649710 2802
2ea97941 2803 unsigned int shndx;
88dd47ac
ILT
2804 typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
2805 typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
ce279a62 2806 elfcpp::STB binding = sym->binding();
ead1e424
ILT
2807 switch (sym->source())
2808 {
2809 case Symbol::FROM_OBJECT:
2810 {
d491d34e
ILT
2811 bool is_ordinary;
2812 unsigned int in_shndx = sym->shndx(&is_ordinary);
ead1e424 2813
d491d34e 2814 if (!is_ordinary
0dfbdef4 2815 && in_shndx != elfcpp::SHN_ABS
8a5e3e08 2816 && !Symbol::is_common_shndx(in_shndx))
ead1e424 2817 {
75f2446e 2818 gold_error(_("%s: unsupported symbol section 0x%x"),
a2b1aa12 2819 sym->demangled_name().c_str(), in_shndx);
2ea97941 2820 shndx = in_shndx;
f6ce93d6 2821 }
ead1e424
ILT
2822 else
2823 {
75f2446e
ILT
2824 Object* symobj = sym->object();
2825 if (symobj->is_dynamic())
2826 {
2827 if (sym->needs_dynsym_value())
8851ecca 2828 dynsym_value = target.dynsym_value(sym);
2ea97941 2829 shndx = elfcpp::SHN_UNDEF;
ce279a62
CC
2830 if (sym->is_undef_binding_weak())
2831 binding = elfcpp::STB_WEAK;
74f67560
DK
2832 else
2833 binding = elfcpp::STB_GLOBAL;
75f2446e 2834 }
89fc3421 2835 else if (symobj->pluginobj() != NULL)
2ea97941 2836 shndx = elfcpp::SHN_UNDEF;
75f2446e 2837 else if (in_shndx == elfcpp::SHN_UNDEF
d491d34e
ILT
2838 || (!is_ordinary
2839 && (in_shndx == elfcpp::SHN_ABS
8a5e3e08 2840 || Symbol::is_common_shndx(in_shndx))))
2ea97941 2841 shndx = in_shndx;
75f2446e
ILT
2842 else
2843 {
2844 Relobj* relobj = static_cast<Relobj*>(symobj);
ef9beddf 2845 Output_section* os = relobj->output_section(in_shndx);
ef15dade
ST
2846 if (this->is_section_folded(relobj, in_shndx))
2847 {
2848 // This global symbol must be written out even though
2849 // it is folded.
2850 // Get the os of the section it is folded onto.
2851 Section_id folded =
2852 this->icf_->get_folded_section(relobj, in_shndx);
2853 gold_assert(folded.first !=NULL);
2854 Relobj* folded_obj =
2855 reinterpret_cast<Relobj*>(folded.first);
2856 os = folded_obj->output_section(folded.second);
2857 gold_assert(os != NULL);
2858 }
75f2446e 2859 gold_assert(os != NULL);
2ea97941 2860 shndx = os->out_shndx();
88dd47ac 2861
2ea97941 2862 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e
ILT
2863 {
2864 if (sym_index != -1U)
2ea97941 2865 symtab_xindex->add(sym_index, shndx);
d491d34e 2866 if (dynsym_index != -1U)
2ea97941
ILT
2867 dynsym_xindex->add(dynsym_index, shndx);
2868 shndx = elfcpp::SHN_XINDEX;
d491d34e
ILT
2869 }
2870
88dd47ac
ILT
2871 // In object files symbol values are section
2872 // relative.
8851ecca 2873 if (parameters->options().relocatable())
88dd47ac 2874 sym_value -= os->address();
75f2446e 2875 }
ead1e424
ILT
2876 }
2877 }
2878 break;
2879
2880 case Symbol::IN_OUTPUT_DATA:
2ea97941
ILT
2881 shndx = sym->output_data()->out_shndx();
2882 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e
ILT
2883 {
2884 if (sym_index != -1U)
2ea97941 2885 symtab_xindex->add(sym_index, shndx);
d491d34e 2886 if (dynsym_index != -1U)
2ea97941
ILT
2887 dynsym_xindex->add(dynsym_index, shndx);
2888 shndx = elfcpp::SHN_XINDEX;
d491d34e 2889 }
ead1e424
ILT
2890 break;
2891
2892 case Symbol::IN_OUTPUT_SEGMENT:
2ea97941 2893 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
2894 break;
2895
f3e9c5c5 2896 case Symbol::IS_CONSTANT:
2ea97941 2897 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
2898 break;
2899
f3e9c5c5 2900 case Symbol::IS_UNDEFINED:
2ea97941 2901 shndx = elfcpp::SHN_UNDEF;
f3e9c5c5
ILT
2902 break;
2903
ead1e424 2904 default:
a3ad94ed 2905 gold_unreachable();
ead1e424 2906 }
61ba1cf9 2907
16649710
ILT
2908 if (sym_index != -1U)
2909 {
55a93433
ILT
2910 sym_index -= first_global_index;
2911 gold_assert(sym_index < output_count);
2912 unsigned char* ps = psyms + (sym_index * sym_size);
2ea97941 2913 this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
ce279a62 2914 binding, sympool, ps);
16649710 2915 }
61ba1cf9 2916
16649710
ILT
2917 if (dynsym_index != -1U)
2918 {
2919 dynsym_index -= first_dynamic_global_index;
2920 gold_assert(dynsym_index < dynamic_count);
2921 unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
2ea97941 2922 this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
ce279a62 2923 binding, dynpool, pd);
16649710 2924 }
61ba1cf9
ILT
2925 }
2926
c06b7b0b 2927 of->write_output_view(this->offset_, oview_size, psyms);
16649710
ILT
2928 if (dynamic_view != NULL)
2929 of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
2930}
2931
2932// Write out the symbol SYM, in section SHNDX, to P. POOL is the
2933// strtab holding the name.
2934
2935template<int size, bool big_endian>
2936void
ab5c9e90
ILT
2937Symbol_table::sized_write_symbol(
2938 Sized_symbol<size>* sym,
2ea97941
ILT
2939 typename elfcpp::Elf_types<size>::Elf_Addr value,
2940 unsigned int shndx,
ce279a62 2941 elfcpp::STB binding,
ab5c9e90 2942 const Stringpool* pool,
7d1a9ebb 2943 unsigned char* p) const
16649710
ILT
2944{
2945 elfcpp::Sym_write<size, big_endian> osym(p);
6d1c4efb
ILT
2946 if (sym->version() == NULL || !parameters->options().relocatable())
2947 osym.put_st_name(pool->get_offset(sym->name()));
2948 else
2949 osym.put_st_name(pool->get_offset(sym->versioned_name()));
2ea97941 2950 osym.put_st_value(value);
58e54ac2 2951 // Use a symbol size of zero for undefined symbols from shared libraries.
2ea97941 2952 if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj())
58e54ac2
CD
2953 osym.put_st_size(0);
2954 else
2955 osym.put_st_size(sym->symsize());
53d7974c
L
2956 elfcpp::STT type = sym->type();
2957 // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
2958 if (type == elfcpp::STT_GNU_IFUNC
2959 && sym->is_from_dynobj())
2960 type = elfcpp::STT_FUNC;
55a93433
ILT
2961 // A version script may have overridden the default binding.
2962 if (sym->is_forced_local())
53d7974c 2963 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type));
55a93433 2964 else
ce279a62 2965 osym.put_st_info(elfcpp::elf_st_info(binding, type));
16649710 2966 osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
2ea97941 2967 osym.put_st_shndx(shndx);
61ba1cf9
ILT
2968}
2969
9a2d6984
ILT
2970// Check for unresolved symbols in shared libraries. This is
2971// controlled by the --allow-shlib-undefined option.
2972
2973// We only warn about libraries for which we have seen all the
2974// DT_NEEDED entries. We don't try to track down DT_NEEDED entries
2975// which were not seen in this link. If we didn't see a DT_NEEDED
2976// entry, we aren't going to be able to reliably report whether the
2977// symbol is undefined.
2978
fd9d194f
ILT
2979// We also don't warn about libraries found in a system library
2980// directory (e.g., /lib or /usr/lib); we assume that those libraries
2981// are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
2982// can have undefined references satisfied by ld-linux.so.
9a2d6984
ILT
2983
2984inline void
fd9d194f 2985Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const
9a2d6984 2986{
d491d34e 2987 bool dummy;
9a2d6984
ILT
2988 if (sym->source() == Symbol::FROM_OBJECT
2989 && sym->object()->is_dynamic()
d491d34e 2990 && sym->shndx(&dummy) == elfcpp::SHN_UNDEF
9a2d6984 2991 && sym->binding() != elfcpp::STB_WEAK
8851ecca
ILT
2992 && !parameters->options().allow_shlib_undefined()
2993 && !parameters->target().is_defined_by_abi(sym)
fd9d194f 2994 && !sym->object()->is_in_system_directory())
9a2d6984
ILT
2995 {
2996 // A very ugly cast.
2997 Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
2998 if (!dynobj->has_unknown_needed_entries())
f073bbf7 2999 gold_undefined_symbol(sym);
9a2d6984
ILT
3000 }
3001}
3002
a3ad94ed
ILT
3003// Write out a section symbol. Return the update offset.
3004
3005void
ca09d69a 3006Symbol_table::write_section_symbol(const Output_section* os,
d491d34e 3007 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3008 Output_file* of,
3009 off_t offset) const
3010{
8851ecca 3011 switch (parameters->size_and_endianness())
a3ad94ed 3012 {
9025d29d 3013#ifdef HAVE_TARGET_32_LITTLE
8851ecca 3014 case Parameters::TARGET_32_LITTLE:
d491d34e
ILT
3015 this->sized_write_section_symbol<32, false>(os, symtab_xindex, of,
3016 offset);
8851ecca 3017 break;
9025d29d 3018#endif
8851ecca
ILT
3019#ifdef HAVE_TARGET_32_BIG
3020 case Parameters::TARGET_32_BIG:
d491d34e
ILT
3021 this->sized_write_section_symbol<32, true>(os, symtab_xindex, of,
3022 offset);
8851ecca 3023 break;
9025d29d 3024#endif
9025d29d 3025#ifdef HAVE_TARGET_64_LITTLE
8851ecca 3026 case Parameters::TARGET_64_LITTLE:
d491d34e
ILT
3027 this->sized_write_section_symbol<64, false>(os, symtab_xindex, of,
3028 offset);
8851ecca 3029 break;
9025d29d 3030#endif
8851ecca
ILT
3031#ifdef HAVE_TARGET_64_BIG
3032 case Parameters::TARGET_64_BIG:
d491d34e
ILT
3033 this->sized_write_section_symbol<64, true>(os, symtab_xindex, of,
3034 offset);
8851ecca
ILT
3035 break;
3036#endif
3037 default:
3038 gold_unreachable();
a3ad94ed 3039 }
a3ad94ed
ILT
3040}
3041
3042// Write out a section symbol, specialized for size and endianness.
3043
3044template<int size, bool big_endian>
3045void
3046Symbol_table::sized_write_section_symbol(const Output_section* os,
d491d34e 3047 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3048 Output_file* of,
3049 off_t offset) const
3050{
3051 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
3052
3053 unsigned char* pov = of->get_output_view(offset, sym_size);
3054
3055 elfcpp::Sym_write<size, big_endian> osym(pov);
3056 osym.put_st_name(0);
b4ecf66b
ILT
3057 if (parameters->options().relocatable())
3058 osym.put_st_value(0);
3059 else
3060 osym.put_st_value(os->address());
a3ad94ed
ILT
3061 osym.put_st_size(0);
3062 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
3063 elfcpp::STT_SECTION));
3064 osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
d491d34e 3065
2ea97941
ILT
3066 unsigned int shndx = os->out_shndx();
3067 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e 3068 {
2ea97941
ILT
3069 symtab_xindex->add(os->symtab_index(), shndx);
3070 shndx = elfcpp::SHN_XINDEX;
d491d34e 3071 }
2ea97941 3072 osym.put_st_shndx(shndx);
a3ad94ed
ILT
3073
3074 of->write_output_view(offset, sym_size, pov);
3075}
3076
abaa3995
ILT
3077// Print statistical information to stderr. This is used for --stats.
3078
3079void
3080Symbol_table::print_stats() const
3081{
3082#if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
3083 fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"),
3084 program_name, this->table_.size(), this->table_.bucket_count());
3085#else
3086 fprintf(stderr, _("%s: symbol table entries: %zu\n"),
3087 program_name, this->table_.size());
3088#endif
ad8f37d1 3089 this->namepool_.print_stats("symbol table stringpool");
abaa3995
ILT
3090}
3091
ff541f30
ILT
3092// We check for ODR violations by looking for symbols with the same
3093// name for which the debugging information reports that they were
71ff8986 3094// defined in disjoint source locations. When comparing the source
55382fb7
ILT
3095// location, we consider instances with the same base filename to be
3096// the same. This is because different object files/shared libraries
3097// can include the same header file using different paths, and
3098// different optimization settings can make the line number appear to
3099// be a couple lines off, and we don't want to report an ODR violation
3100// in those cases.
ff541f30
ILT
3101
3102// This struct is used to compare line information, as returned by
7bf1f802 3103// Dwarf_line_info::one_addr2line. It implements a < comparison
71ff8986 3104// operator used with std::sort.
ff541f30
ILT
3105
3106struct Odr_violation_compare
3107{
3108 bool
3109 operator()(const std::string& s1, const std::string& s2) const
3110 {
55382fb7 3111 // Inputs should be of the form "dirname/filename:linenum" where
71ff8986 3112 // "dirname/" is optional. We want to compare just the filename:linenum.
55382fb7 3113
71ff8986 3114 // Find the last '/' in each string.
55382fb7
ILT
3115 std::string::size_type s1begin = s1.rfind('/');
3116 std::string::size_type s2begin = s2.rfind('/');
55382fb7
ILT
3117 // If there was no '/' in a string, start at the beginning.
3118 if (s1begin == std::string::npos)
3119 s1begin = 0;
3120 if (s2begin == std::string::npos)
3121 s2begin = 0;
71ff8986
ILT
3122 return s1.compare(s1begin, std::string::npos,
3123 s2, s2begin, std::string::npos) < 0;
ff541f30
ILT
3124 }
3125};
3126
71ff8986
ILT
3127// Returns all of the lines attached to LOC, not just the one the
3128// instruction actually came from.
3129std::vector<std::string>
3130Symbol_table::linenos_from_loc(const Task* task,
3131 const Symbol_location& loc)
3132{
3133 // We need to lock the object in order to read it. This
3134 // means that we have to run in a singleton Task. If we
3135 // want to run this in a general Task for better
3136 // performance, we will need one Task for object, plus
3137 // appropriate locking to ensure that we don't conflict with
3138 // other uses of the object. Also note, one_addr2line is not
3139 // currently thread-safe.
3140 Task_lock_obj<Object> tl(task, loc.object);
3141
3142 std::vector<std::string> result;
3143 // 16 is the size of the object-cache that one_addr2line should use.
3144 std::string canonical_result = Dwarf_line_info::one_addr2line(
3145 loc.object, loc.shndx, loc.offset, 16, &result);
3146 if (!canonical_result.empty())
3147 result.push_back(canonical_result);
3148 return result;
3149}
3150
3151// OutputIterator that records if it was ever assigned to. This
3152// allows it to be used with std::set_intersection() to check for
3153// intersection rather than computing the intersection.
3154struct Check_intersection
3155{
3156 Check_intersection()
3157 : value_(false)
3158 {}
3159
3160 bool had_intersection() const
3161 { return this->value_; }
3162
3163 Check_intersection& operator++()
3164 { return *this; }
3165
3166 Check_intersection& operator*()
3167 { return *this; }
3168
3169 template<typename T>
3170 Check_intersection& operator=(const T&)
3171 {
3172 this->value_ = true;
3173 return *this;
3174 }
3175
3176 private:
3177 bool value_;
3178};
3179
70e654ba 3180// Check candidate_odr_violations_ to find symbols with the same name
71ff8986
ILT
3181// but apparently different definitions (different source-file/line-no
3182// for each line assigned to the first instruction).
70e654ba
ILT
3183
3184void
17a1d0a9
ILT
3185Symbol_table::detect_odr_violations(const Task* task,
3186 const char* output_file_name) const
70e654ba
ILT
3187{
3188 for (Odr_map::const_iterator it = candidate_odr_violations_.begin();
3189 it != candidate_odr_violations_.end();
3190 ++it)
3191 {
71ff8986
ILT
3192 const char* const symbol_name = it->first;
3193
3194 std::string first_object_name;
3195 std::vector<std::string> first_object_linenos;
3196
3197 Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3198 locs = it->second.begin();
3199 const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3200 locs_end = it->second.end();
3201 for (; locs != locs_end && first_object_linenos.empty(); ++locs)
70e654ba 3202 {
71ff8986
ILT
3203 // Save the line numbers from the first definition to
3204 // compare to the other definitions. Ideally, we'd compare
3205 // every definition to every other, but we don't want to
3206 // take O(N^2) time to do this. This shortcut may cause
3207 // false negatives that appear or disappear depending on the
3208 // link order, but it won't cause false positives.
3209 first_object_name = locs->object->name();
3210 first_object_linenos = this->linenos_from_loc(task, *locs);
70e654ba
ILT
3211 }
3212
71ff8986
ILT
3213 // Sort by Odr_violation_compare to make std::set_intersection work.
3214 std::sort(first_object_linenos.begin(), first_object_linenos.end(),
3215 Odr_violation_compare());
3216
3217 for (; locs != locs_end; ++locs)
70e654ba 3218 {
71ff8986
ILT
3219 std::vector<std::string> linenos =
3220 this->linenos_from_loc(task, *locs);
3221 // linenos will be empty if we couldn't parse the debug info.
3222 if (linenos.empty())
3223 continue;
3224 // Sort by Odr_violation_compare to make std::set_intersection work.
3225 std::sort(linenos.begin(), linenos.end(), Odr_violation_compare());
3226
3227 Check_intersection intersection_result =
3228 std::set_intersection(first_object_linenos.begin(),
3229 first_object_linenos.end(),
3230 linenos.begin(),
3231 linenos.end(),
3232 Check_intersection(),
3233 Odr_violation_compare());
3234 if (!intersection_result.had_intersection())
3235 {
3236 gold_warning(_("while linking %s: symbol '%s' defined in "
3237 "multiple places (possible ODR violation):"),
3238 output_file_name, demangle(symbol_name).c_str());
3239 // This only prints one location from each definition,
3240 // which may not be the location we expect to intersect
3241 // with another definition. We could print the whole
3242 // set of locations, but that seems too verbose.
3243 gold_assert(!first_object_linenos.empty());
3244 gold_assert(!linenos.empty());
3245 fprintf(stderr, _(" %s from %s\n"),
3246 first_object_linenos[0].c_str(),
3247 first_object_name.c_str());
3248 fprintf(stderr, _(" %s from %s\n"),
3249 linenos[0].c_str(),
3250 locs->object->name().c_str());
3251 // Only print one broken pair, to avoid needing to
3252 // compare against a list of the disjoint definition
3253 // locations we've found so far. (If we kept comparing
3254 // against just the first one, we'd get a lot of
3255 // redundant complaints about the second definition
3256 // location.)
3257 break;
3258 }
70e654ba
ILT
3259 }
3260 }
e4e5049b
CS
3261 // We only call one_addr2line() in this function, so we can clear its cache.
3262 Dwarf_line_info::clear_addr2line_cache();
70e654ba
ILT
3263}
3264
f6ce93d6
ILT
3265// Warnings functions.
3266
3267// Add a new warning.
3268
3269void
2ea97941 3270Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
cb295612 3271 const std::string& warning)
f6ce93d6 3272{
2ea97941
ILT
3273 name = symtab->canonicalize_name(name);
3274 this->warnings_[name].set(obj, warning);
f6ce93d6
ILT
3275}
3276
3277// Look through the warnings and mark the symbols for which we should
3278// warn. This is called during Layout::finalize when we know the
3279// sources for all the symbols.
3280
3281void
cb295612 3282Warnings::note_warnings(Symbol_table* symtab)
f6ce93d6
ILT
3283{
3284 for (Warning_table::iterator p = this->warnings_.begin();
3285 p != this->warnings_.end();
3286 ++p)
3287 {
3288 Symbol* sym = symtab->lookup(p->first, NULL);
3289 if (sym != NULL
3290 && sym->source() == Symbol::FROM_OBJECT
3291 && sym->object() == p->second.object)
cb295612 3292 sym->set_has_warning();
f6ce93d6
ILT
3293 }
3294}
3295
3296// Issue a warning. This is called when we see a relocation against a
3297// symbol for which has a warning.
3298
75f2446e 3299template<int size, bool big_endian>
f6ce93d6 3300void
75f2446e
ILT
3301Warnings::issue_warning(const Symbol* sym,
3302 const Relocate_info<size, big_endian>* relinfo,
3303 size_t relnum, off_t reloffset) const
f6ce93d6 3304{
a3ad94ed 3305 gold_assert(sym->has_warning());
9d3b0698
ILT
3306
3307 // We don't want to issue a warning for a relocation against the
3308 // symbol in the same object file in which the symbol is defined.
3309 if (sym->object() == relinfo->object)
3310 return;
3311
f6ce93d6 3312 Warning_table::const_iterator p = this->warnings_.find(sym->name());
a3ad94ed 3313 gold_assert(p != this->warnings_.end());
75f2446e
ILT
3314 gold_warning_at_location(relinfo, relnum, reloffset,
3315 "%s", p->second.text.c_str());
f6ce93d6
ILT
3316}
3317
14bfc3f5
ILT
3318// Instantiate the templates we need. We could use the configure
3319// script to restrict this to only the ones needed for implemented
3320// targets.
3321
c7912668
ILT
3322#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3323template
3324void
3325Sized_symbol<32>::allocate_common(Output_data*, Value_type);
3326#endif
3327
3328#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3329template
3330void
3331Sized_symbol<64>::allocate_common(Output_data*, Value_type);
3332#endif
3333
193a53d9 3334#ifdef HAVE_TARGET_32_LITTLE
14bfc3f5
ILT
3335template
3336void
193a53d9 3337Symbol_table::add_from_relobj<32, false>(
6fa2a40b 3338 Sized_relobj_file<32, false>* relobj,
f6ce93d6 3339 const unsigned char* syms,
14bfc3f5 3340 size_t count,
d491d34e 3341 size_t symndx_offset,
14bfc3f5
ILT
3342 const char* sym_names,
3343 size_t sym_name_size,
6fa2a40b 3344 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3345 size_t* defined);
193a53d9 3346#endif
14bfc3f5 3347
193a53d9 3348#ifdef HAVE_TARGET_32_BIG
14bfc3f5
ILT
3349template
3350void
193a53d9 3351Symbol_table::add_from_relobj<32, true>(
6fa2a40b 3352 Sized_relobj_file<32, true>* relobj,
f6ce93d6 3353 const unsigned char* syms,
14bfc3f5 3354 size_t count,
d491d34e 3355 size_t symndx_offset,
14bfc3f5
ILT
3356 const char* sym_names,
3357 size_t sym_name_size,
6fa2a40b 3358 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3359 size_t* defined);
193a53d9 3360#endif
14bfc3f5 3361
193a53d9 3362#ifdef HAVE_TARGET_64_LITTLE
14bfc3f5
ILT
3363template
3364void
193a53d9 3365Symbol_table::add_from_relobj<64, false>(
6fa2a40b 3366 Sized_relobj_file<64, false>* relobj,
f6ce93d6 3367 const unsigned char* syms,
14bfc3f5 3368 size_t count,
d491d34e 3369 size_t symndx_offset,
14bfc3f5
ILT
3370 const char* sym_names,
3371 size_t sym_name_size,
6fa2a40b 3372 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3373 size_t* defined);
193a53d9 3374#endif
14bfc3f5 3375
193a53d9 3376#ifdef HAVE_TARGET_64_BIG
14bfc3f5
ILT
3377template
3378void
193a53d9 3379Symbol_table::add_from_relobj<64, true>(
6fa2a40b 3380 Sized_relobj_file<64, true>* relobj,
f6ce93d6 3381 const unsigned char* syms,
14bfc3f5 3382 size_t count,
d491d34e 3383 size_t symndx_offset,
14bfc3f5
ILT
3384 const char* sym_names,
3385 size_t sym_name_size,
6fa2a40b 3386 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3387 size_t* defined);
193a53d9 3388#endif
14bfc3f5 3389
89fc3421
CC
3390#ifdef HAVE_TARGET_32_LITTLE
3391template
3392Symbol*
3393Symbol_table::add_from_pluginobj<32, false>(
3394 Sized_pluginobj<32, false>* obj,
3395 const char* name,
3396 const char* ver,
3397 elfcpp::Sym<32, false>* sym);
3398#endif
3399
3400#ifdef HAVE_TARGET_32_BIG
3401template
3402Symbol*
3403Symbol_table::add_from_pluginobj<32, true>(
3404 Sized_pluginobj<32, true>* obj,
3405 const char* name,
3406 const char* ver,
3407 elfcpp::Sym<32, true>* sym);
3408#endif
3409
3410#ifdef HAVE_TARGET_64_LITTLE
3411template
3412Symbol*
3413Symbol_table::add_from_pluginobj<64, false>(
3414 Sized_pluginobj<64, false>* obj,
3415 const char* name,
3416 const char* ver,
3417 elfcpp::Sym<64, false>* sym);
3418#endif
3419
3420#ifdef HAVE_TARGET_64_BIG
3421template
3422Symbol*
3423Symbol_table::add_from_pluginobj<64, true>(
3424 Sized_pluginobj<64, true>* obj,
3425 const char* name,
3426 const char* ver,
3427 elfcpp::Sym<64, true>* sym);
3428#endif
3429
193a53d9 3430#ifdef HAVE_TARGET_32_LITTLE
dbe717ef
ILT
3431template
3432void
193a53d9
ILT
3433Symbol_table::add_from_dynobj<32, false>(
3434 Sized_dynobj<32, false>* dynobj,
dbe717ef
ILT
3435 const unsigned char* syms,
3436 size_t count,
3437 const char* sym_names,
3438 size_t sym_name_size,
3439 const unsigned char* versym,
3440 size_t versym_size,
92de84a6 3441 const std::vector<const char*>* version_map,
6fa2a40b 3442 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3443 size_t* defined);
193a53d9 3444#endif
dbe717ef 3445
193a53d9 3446#ifdef HAVE_TARGET_32_BIG
dbe717ef
ILT
3447template
3448void
193a53d9
ILT
3449Symbol_table::add_from_dynobj<32, true>(
3450 Sized_dynobj<32, true>* dynobj,
dbe717ef
ILT
3451 const unsigned char* syms,
3452 size_t count,
3453 const char* sym_names,
3454 size_t sym_name_size,
3455 const unsigned char* versym,
3456 size_t versym_size,
92de84a6 3457 const std::vector<const char*>* version_map,
6fa2a40b 3458 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3459 size_t* defined);
193a53d9 3460#endif
dbe717ef 3461
193a53d9 3462#ifdef HAVE_TARGET_64_LITTLE
dbe717ef
ILT
3463template
3464void
193a53d9
ILT
3465Symbol_table::add_from_dynobj<64, false>(
3466 Sized_dynobj<64, false>* dynobj,
dbe717ef
ILT
3467 const unsigned char* syms,
3468 size_t count,
3469 const char* sym_names,
3470 size_t sym_name_size,
3471 const unsigned char* versym,
3472 size_t versym_size,
92de84a6 3473 const std::vector<const char*>* version_map,
6fa2a40b 3474 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3475 size_t* defined);
193a53d9 3476#endif
dbe717ef 3477
193a53d9 3478#ifdef HAVE_TARGET_64_BIG
dbe717ef
ILT
3479template
3480void
193a53d9
ILT
3481Symbol_table::add_from_dynobj<64, true>(
3482 Sized_dynobj<64, true>* dynobj,
dbe717ef
ILT
3483 const unsigned char* syms,
3484 size_t count,
3485 const char* sym_names,
3486 size_t sym_name_size,
3487 const unsigned char* versym,
3488 size_t versym_size,
92de84a6 3489 const std::vector<const char*>* version_map,
6fa2a40b 3490 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3491 size_t* defined);
193a53d9 3492#endif
dbe717ef 3493
cdc29364
CC
3494#ifdef HAVE_TARGET_32_LITTLE
3495template
26d3c67d 3496Sized_symbol<32>*
cdc29364
CC
3497Symbol_table::add_from_incrobj(
3498 Object* obj,
3499 const char* name,
3500 const char* ver,
3501 elfcpp::Sym<32, false>* sym);
3502#endif
3503
3504#ifdef HAVE_TARGET_32_BIG
3505template
26d3c67d 3506Sized_symbol<32>*
cdc29364
CC
3507Symbol_table::add_from_incrobj(
3508 Object* obj,
3509 const char* name,
3510 const char* ver,
3511 elfcpp::Sym<32, true>* sym);
3512#endif
3513
3514#ifdef HAVE_TARGET_64_LITTLE
3515template
26d3c67d 3516Sized_symbol<64>*
cdc29364
CC
3517Symbol_table::add_from_incrobj(
3518 Object* obj,
3519 const char* name,
3520 const char* ver,
3521 elfcpp::Sym<64, false>* sym);
3522#endif
3523
3524#ifdef HAVE_TARGET_64_BIG
3525template
26d3c67d 3526Sized_symbol<64>*
cdc29364
CC
3527Symbol_table::add_from_incrobj(
3528 Object* obj,
3529 const char* name,
3530 const char* ver,
3531 elfcpp::Sym<64, true>* sym);
3532#endif
3533
46fe1623
ILT
3534#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3535template
3536void
fe8718a4 3537Symbol_table::define_with_copy_reloc<32>(
fe8718a4
ILT
3538 Sized_symbol<32>* sym,
3539 Output_data* posd,
2ea97941 3540 elfcpp::Elf_types<32>::Elf_Addr value);
46fe1623
ILT
3541#endif
3542
3543#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3544template
3545void
fe8718a4 3546Symbol_table::define_with_copy_reloc<64>(
fe8718a4
ILT
3547 Sized_symbol<64>* sym,
3548 Output_data* posd,
2ea97941 3549 elfcpp::Elf_types<64>::Elf_Addr value);
46fe1623
ILT
3550#endif
3551
75f2446e
ILT
3552#ifdef HAVE_TARGET_32_LITTLE
3553template
3554void
3555Warnings::issue_warning<32, false>(const Symbol* sym,
3556 const Relocate_info<32, false>* relinfo,
3557 size_t relnum, off_t reloffset) const;
3558#endif
3559
3560#ifdef HAVE_TARGET_32_BIG
3561template
3562void
3563Warnings::issue_warning<32, true>(const Symbol* sym,
3564 const Relocate_info<32, true>* relinfo,
3565 size_t relnum, off_t reloffset) const;
3566#endif
3567
3568#ifdef HAVE_TARGET_64_LITTLE
3569template
3570void
3571Warnings::issue_warning<64, false>(const Symbol* sym,
3572 const Relocate_info<64, false>* relinfo,
3573 size_t relnum, off_t reloffset) const;
3574#endif
3575
3576#ifdef HAVE_TARGET_64_BIG
3577template
3578void
3579Warnings::issue_warning<64, true>(const Symbol* sym,
3580 const Relocate_info<64, true>* relinfo,
3581 size_t relnum, off_t reloffset) const;
3582#endif
3583
14bfc3f5 3584} // End namespace gold.