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Extend recognized types of SDT probe's arguments
[thirdparty/binutils-gdb.git] / gold / symtab.cc
CommitLineData
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1// symtab.cc -- the gold symbol table
2
4b95cf5c 3// Copyright (C) 2006-2014 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
ead1e424
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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;
ce279a62
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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CC
157 Segment_offset_base offset_base,
158 bool is_predefined)
ead1e424 159{
2ea97941 160 this->init_fields(name, version, type, binding, visibility, nonvis);
ead1e424 161 this->u_.in_output_segment.output_segment = os;
2ea97941 162 this->u_.in_output_segment.offset_base = offset_base;
ead1e424 163 this->source_ = IN_OUTPUT_SEGMENT;
008db82e 164 this->in_reg_ = true;
89fc3421 165 this->in_real_elf_ = true;
5146f448 166 this->is_predefined_ = is_predefined;
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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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CC
257 Segment_offset_base offset_base,
258 bool is_predefined)
ead1e424 259{
2ea97941 260 this->init_base_output_segment(name, version, os, type, binding, visibility,
5146f448 261 nonvis, offset_base, is_predefined);
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262 this->value_ = value;
263 this->symsize_ = symsize;
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264}
265
266// Initialize the fields in Sized_symbol for a symbol defined as a
267// constant.
268
269template<int size>
270void
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271Sized_symbol<size>::init_constant(const char* name, const char* version,
272 Value_type value, Size_type symsize,
273 elfcpp::STT type, elfcpp::STB binding,
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CC
274 elfcpp::STV visibility, unsigned char nonvis,
275 bool is_predefined)
ead1e424 276{
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277 this->init_base_constant(name, version, type, binding, visibility, nonvis,
278 is_predefined);
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279 this->value_ = value;
280 this->symsize_ = symsize;
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281}
282
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283// Initialize the fields in Sized_symbol for an undefined symbol.
284
285template<int size>
286void
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287Sized_symbol<size>::init_undefined(const char* name, const char* version,
288 elfcpp::STT type, elfcpp::STB binding,
289 elfcpp::STV visibility, unsigned char nonvis)
f3e9c5c5 290{
2ea97941 291 this->init_base_undefined(name, version, type, binding, visibility, nonvis);
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292 this->value_ = 0;
293 this->symsize_ = 0;
294}
295
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296// Return an allocated string holding the symbol's name as
297// name@version. This is used for relocatable links.
298
299std::string
300Symbol::versioned_name() const
301{
302 gold_assert(this->version_ != NULL);
303 std::string ret = this->name_;
304 ret.push_back('@');
305 if (this->is_def_)
306 ret.push_back('@');
307 ret += this->version_;
308 return ret;
309}
310
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311// Return true if SHNDX represents a common symbol.
312
313bool
2ea97941 314Symbol::is_common_shndx(unsigned int shndx)
8a5e3e08 315{
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316 return (shndx == elfcpp::SHN_COMMON
317 || shndx == parameters->target().small_common_shndx()
318 || shndx == parameters->target().large_common_shndx());
8a5e3e08
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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
ST
349 // If this symbol's section is not added, the symbol need not be added.
350 // The section may have been GCed. Note that export_dynamic is being
351 // overridden here. This should not be done for shared objects.
352 if (parameters->options().gc_sections()
353 && !parameters->options().shared()
354 && this->source() == Symbol::FROM_OBJECT
355 && !this->object()->is_dynamic())
356 {
357 Relobj* relobj = static_cast<Relobj*>(this->object());
358 bool is_ordinary;
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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
31821be0
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366 // If the symbol was forced dynamic in a --dynamic-list file
367 // or an --export-dynamic-symbol option, add it.
b24fdbf5
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368 if (!this->is_from_dynobj()
369 && (parameters->options().in_dynamic_list(this->name())
370 || parameters->options().is_export_dynamic_symbol(this->name())))
31821be0
CC
371 {
372 if (!this->is_forced_local())
373 return true;
374 gold_warning(_("Cannot export local symbol '%s'"),
375 this->demangled_name().c_str());
376 return false;
377 }
378
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379 // If the symbol was forced local in a version script, do not add it.
380 if (this->is_forced_local())
381 return false;
382
c82fbeee
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383 // If dynamic-list-data was specified, add any STT_OBJECT.
384 if (parameters->options().dynamic_list_data()
385 && !this->is_from_dynobj()
386 && this->type() == elfcpp::STT_OBJECT)
387 return true;
388
389 // If --dynamic-list-cpp-new was specified, add any new/delete symbol.
390 // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols.
391 if ((parameters->options().dynamic_list_cpp_new()
392 || parameters->options().dynamic_list_cpp_typeinfo())
393 && !this->is_from_dynobj())
394 {
395 // TODO(csilvers): We could probably figure out if we're an operator
396 // new/delete or typeinfo without the need to demangle.
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397 char* demangled_name = cplus_demangle(this->name(),
398 DMGL_ANSI | DMGL_PARAMS);
399 if (demangled_name == NULL)
c82fbeee
CS
400 {
401 // Not a C++ symbol, so it can't satisfy these flags
402 }
403 else if (parameters->options().dynamic_list_cpp_new()
2ea97941
ILT
404 && (strprefix(demangled_name, "operator new")
405 || strprefix(demangled_name, "operator delete")))
c82fbeee 406 {
2ea97941 407 free(demangled_name);
c82fbeee
CS
408 return true;
409 }
410 else if (parameters->options().dynamic_list_cpp_typeinfo()
2ea97941
ILT
411 && (strprefix(demangled_name, "typeinfo name for")
412 || strprefix(demangled_name, "typeinfo for")))
c82fbeee 413 {
2ea97941 414 free(demangled_name);
c82fbeee
CS
415 return true;
416 }
417 else
2ea97941 418 free(demangled_name);
c82fbeee
CS
419 }
420
436ca963
ILT
421 // If exporting all symbols or building a shared library,
422 // and the symbol is defined in a regular object and is
423 // externally visible, we need to add it.
8851ecca 424 if ((parameters->options().export_dynamic() || parameters->options().shared())
436ca963 425 && !this->is_from_dynobj()
f3ae1b28 426 && !this->is_undefined()
436ca963
ILT
427 && this->is_externally_visible())
428 return true;
429
430 return false;
431}
432
b3b74ddc
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433// Return true if the final value of this symbol is known at link
434// time.
435
436bool
437Symbol::final_value_is_known() const
438{
439 // If we are not generating an executable, then no final values are
440 // known, since they will change at runtime.
374ad285
ILT
441 if (parameters->options().output_is_position_independent()
442 || parameters->options().relocatable())
b3b74ddc
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443 return false;
444
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445 // If the symbol is not from an object file, and is not undefined,
446 // then it is defined, and known.
b3b74ddc 447 if (this->source_ != FROM_OBJECT)
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448 {
449 if (this->source_ != IS_UNDEFINED)
450 return true;
451 }
452 else
453 {
454 // If the symbol is from a dynamic object, then the final value
455 // is not known.
456 if (this->object()->is_dynamic())
457 return false;
b3b74ddc 458
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459 // If the symbol is not undefined (it is defined or common),
460 // then the final value is known.
461 if (!this->is_undefined())
462 return true;
463 }
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464
465 // If the symbol is undefined, then whether the final value is known
466 // depends on whether we are doing a static link. If we are doing a
467 // dynamic link, then the final value could be filled in at runtime.
468 // This could reasonably be the case for a weak undefined symbol.
469 return parameters->doing_static_link();
470}
471
77e65537 472// Return the output section where this symbol is defined.
a445fddf 473
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ILT
474Output_section*
475Symbol::output_section() const
a445fddf
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476{
477 switch (this->source_)
478 {
479 case FROM_OBJECT:
77e65537 480 {
2ea97941
ILT
481 unsigned int shndx = this->u_.from_object.shndx;
482 if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_)
77e65537
ILT
483 {
484 gold_assert(!this->u_.from_object.object->is_dynamic());
89fc3421 485 gold_assert(this->u_.from_object.object->pluginobj() == NULL);
77e65537 486 Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object);
2ea97941 487 return relobj->output_section(shndx);
77e65537
ILT
488 }
489 return NULL;
490 }
491
a445fddf 492 case IN_OUTPUT_DATA:
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493 return this->u_.in_output_data.output_data->output_section();
494
a445fddf 495 case IN_OUTPUT_SEGMENT:
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496 case IS_CONSTANT:
497 case IS_UNDEFINED:
77e65537
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498 return NULL;
499
500 default:
501 gold_unreachable();
502 }
503}
504
505// Set the symbol's output section. This is used for symbols defined
506// in scripts. This should only be called after the symbol table has
507// been finalized.
508
509void
510Symbol::set_output_section(Output_section* os)
511{
512 switch (this->source_)
513 {
514 case FROM_OBJECT:
515 case IN_OUTPUT_DATA:
516 gold_assert(this->output_section() == os);
517 break;
f3e9c5c5 518 case IS_CONSTANT:
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519 this->source_ = IN_OUTPUT_DATA;
520 this->u_.in_output_data.output_data = os;
521 this->u_.in_output_data.offset_is_from_end = false;
522 break;
523 case IN_OUTPUT_SEGMENT:
f3e9c5c5 524 case IS_UNDEFINED:
a445fddf
ILT
525 default:
526 gold_unreachable();
527 }
528}
529
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530// Class Symbol_table.
531
09124467 532Symbol_table::Symbol_table(unsigned int count,
2ea97941 533 const Version_script_info& version_script)
6d013333 534 : saw_undefined_(0), offset_(0), table_(count), namepool_(),
8a5e3e08
ILT
535 forwarders_(), commons_(), tls_commons_(), small_commons_(),
536 large_commons_(), forced_locals_(), warnings_(),
2ea97941 537 version_script_(version_script), gc_(NULL), icf_(NULL)
14bfc3f5 538{
6d013333 539 namepool_.reserve(count);
14bfc3f5
ILT
540}
541
542Symbol_table::~Symbol_table()
543{
544}
545
ad8f37d1
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546// The symbol table key equality function. This is called with
547// Stringpool keys.
14bfc3f5 548
ad8f37d1 549inline bool
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550Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1,
551 const Symbol_table_key& k2) const
552{
553 return k1.first == k2.first && k1.second == k2.second;
554}
555
ef15dade 556bool
2ea97941 557Symbol_table::is_section_folded(Object* obj, unsigned int shndx) const
ef15dade 558{
032ce4e9 559 return (parameters->options().icf_enabled()
2ea97941 560 && this->icf_->is_section_folded(obj, shndx));
ef15dade
ST
561}
562
31821be0
CC
563// For symbols that have been listed with a -u or --export-dynamic-symbol
564// option, add them to the work list to avoid gc'ing them.
6d03d481
ST
565
566void
88a4108b 567Symbol_table::gc_mark_undef_symbols(Layout* layout)
6d03d481
ST
568{
569 for (options::String_set::const_iterator p =
570 parameters->options().undefined_begin();
571 p != parameters->options().undefined_end();
572 ++p)
573 {
2ea97941
ILT
574 const char* name = p->c_str();
575 Symbol* sym = this->lookup(name);
ca09d69a 576 gold_assert(sym != NULL);
6d03d481
ST
577 if (sym->source() == Symbol::FROM_OBJECT
578 && !sym->object()->is_dynamic())
579 {
e81fea4d 580 this->gc_mark_symbol(sym);
6d03d481
ST
581 }
582 }
88a4108b 583
31821be0
CC
584 for (options::String_set::const_iterator p =
585 parameters->options().export_dynamic_symbol_begin();
586 p != parameters->options().export_dynamic_symbol_end();
587 ++p)
588 {
589 const char* name = p->c_str();
590 Symbol* sym = this->lookup(name);
1d5dfe78
CC
591 // It's not an error if a symbol named by --export-dynamic-symbol
592 // is undefined.
593 if (sym != NULL
594 && sym->source() == Symbol::FROM_OBJECT
31821be0
CC
595 && !sym->object()->is_dynamic())
596 {
e81fea4d 597 this->gc_mark_symbol(sym);
31821be0
CC
598 }
599 }
600
88a4108b
ILT
601 for (Script_options::referenced_const_iterator p =
602 layout->script_options()->referenced_begin();
603 p != layout->script_options()->referenced_end();
604 ++p)
605 {
606 Symbol* sym = this->lookup(p->c_str());
607 gold_assert(sym != NULL);
608 if (sym->source() == Symbol::FROM_OBJECT
609 && !sym->object()->is_dynamic())
610 {
e81fea4d 611 this->gc_mark_symbol(sym);
88a4108b
ILT
612 }
613 }
6d03d481
ST
614}
615
616void
7257cc92 617Symbol_table::gc_mark_symbol(Symbol* sym)
6d03d481 618{
7257cc92 619 // Add the object and section to the work list.
7257cc92
ST
620 bool is_ordinary;
621 unsigned int shndx = sym->shndx(&is_ordinary);
622 if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
6d03d481 623 {
7257cc92 624 gold_assert(this->gc_!= NULL);
e81fea4d 625 this->gc_->worklist().push(Section_id(sym->object(), shndx));
6d03d481 626 }
e81fea4d 627 parameters->target().gc_mark_symbol(this, sym);
6d03d481
ST
628}
629
630// When doing garbage collection, keep symbols that have been seen in
631// dynamic objects.
632inline void
633Symbol_table::gc_mark_dyn_syms(Symbol* sym)
634{
635 if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT
636 && !sym->object()->is_dynamic())
7257cc92 637 this->gc_mark_symbol(sym);
6d03d481
ST
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 1144
a7dac153
CC
1145 // FIXME: For incremental links, we don't store version information,
1146 // so we need to ignore version symbols for now.
1147 if (parameters->incremental_update() && ver != NULL)
1148 {
1149 namelen = ver - name;
1150 ver = NULL;
1151 }
1152
09124467
ILT
1153 if (ver != NULL)
1154 {
1155 // The symbol name is of the form foo@VERSION or foo@@VERSION
2ea97941 1156 namelen = ver - name;
09124467
ILT
1157 ++ver;
1158 if (*ver == '@')
1159 {
8781f709 1160 is_default_version = true;
09124467
ILT
1161 ++ver;
1162 }
057ead22 1163 ver = this->namepool_.add(ver, true, &ver_key);
09124467 1164 }
5871526f
ILT
1165 // We don't want to assign a version to an undefined symbol,
1166 // even if it is listed in the version script. FIXME: What
1167 // about a common symbol?
057ead22
ILT
1168 else
1169 {
2ea97941 1170 namelen = strlen(name);
057ead22
ILT
1171 if (!this->version_script_.empty()
1172 && st_shndx != elfcpp::SHN_UNDEF)
1173 {
1174 // The symbol name did not have a version, but the
1175 // version script may assign a version anyway.
2ea97941 1176 std::string version;
98e090bd
ILT
1177 bool is_global;
1178 if (this->version_script_.get_symbol_version(name, &version,
1179 &is_global))
057ead22 1180 {
98e090bd
ILT
1181 if (!is_global)
1182 is_forced_local = true;
1183 else if (!version.empty())
057ead22 1184 {
2ea97941
ILT
1185 ver = this->namepool_.add_with_length(version.c_str(),
1186 version.length(),
057ead22
ILT
1187 true,
1188 &ver_key);
8781f709 1189 is_default_version = true;
057ead22
ILT
1190 }
1191 }
057ead22
ILT
1192 }
1193 }
14bfc3f5 1194
d491d34e
ILT
1195 elfcpp::Sym<size, big_endian>* psym = &sym;
1196 unsigned char symbuf[sym_size];
1197 elfcpp::Sym<size, big_endian> sym2(symbuf);
88dd47ac
ILT
1198 if (just_symbols)
1199 {
d491d34e 1200 memcpy(symbuf, p, sym_size);
88dd47ac 1201 elfcpp::Sym_write<size, big_endian> sw(symbuf);
9590bf25
CC
1202 if (orig_st_shndx != elfcpp::SHN_UNDEF
1203 && is_ordinary
1204 && relobj->e_type() == elfcpp::ET_REL)
88dd47ac 1205 {
9590bf25
CC
1206 // Symbol values in relocatable object files are section
1207 // relative. This is normally what we want, but since here
1208 // we are converting the symbol to absolute we need to add
1209 // the section address. The section address in an object
88dd47ac
ILT
1210 // file is normally zero, but people can use a linker
1211 // script to change it.
d491d34e
ILT
1212 sw.put_st_value(sym.get_st_value()
1213 + relobj->section_address(orig_st_shndx));
88dd47ac 1214 }
d491d34e
ILT
1215 st_shndx = elfcpp::SHN_ABS;
1216 is_ordinary = false;
88dd47ac
ILT
1217 psym = &sym2;
1218 }
1219
65514900 1220 // Fix up visibility if object has no-export set.
1c74fab0
ILT
1221 if (relobj->no_export()
1222 && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary))
65514900
CC
1223 {
1224 // We may have copied symbol already above.
1225 if (psym != &sym2)
1226 {
1227 memcpy(symbuf, p, sym_size);
1228 psym = &sym2;
1229 }
1230
1231 elfcpp::STV visibility = sym2.get_st_visibility();
1232 if (visibility == elfcpp::STV_DEFAULT
1233 || visibility == elfcpp::STV_PROTECTED)
1234 {
1235 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1236 unsigned char nonvis = sym2.get_st_nonvis();
1237 sw.put_st_other(elfcpp::STV_HIDDEN, nonvis);
1238 }
1239 }
1240
057ead22 1241 Stringpool::Key name_key;
2ea97941 1242 name = this->namepool_.add_with_length(name, namelen, true,
057ead22
ILT
1243 &name_key);
1244
aeddab66 1245 Sized_symbol<size>* res;
2ea97941 1246 res = this->add_from_object(relobj, name, name_key, ver, ver_key,
8781f709
ILT
1247 is_default_version, *psym, st_shndx,
1248 is_ordinary, orig_st_shndx);
6d03d481 1249
804eb480
ST
1250 if (is_forced_local)
1251 this->force_local(res);
1252
7257cc92
ST
1253 // Do not treat this symbol as garbage if this symbol will be
1254 // exported to the dynamic symbol table. This is true when
1255 // building a shared library or using --export-dynamic and
1256 // the symbol is externally visible.
1257 if (parameters->options().gc_sections()
1258 && res->is_externally_visible()
1259 && !res->is_from_dynobj()
1260 && (parameters->options().shared()
fd834e57
CC
1261 || parameters->options().export_dynamic()
1262 || parameters->options().in_dynamic_list(res->name())))
7257cc92 1263 this->gc_mark_symbol(res);
f0641a0b 1264
880cd20d
ILT
1265 if (is_defined_in_discarded_section)
1266 res->set_is_defined_in_discarded_section();
1267
730cdc88 1268 (*sympointers)[i] = res;
14bfc3f5
ILT
1269 }
1270}
1271
89fc3421
CC
1272// Add a symbol from a plugin-claimed file.
1273
1274template<int size, bool big_endian>
1275Symbol*
1276Symbol_table::add_from_pluginobj(
1277 Sized_pluginobj<size, big_endian>* obj,
2ea97941 1278 const char* name,
89fc3421
CC
1279 const char* ver,
1280 elfcpp::Sym<size, big_endian>* sym)
1281{
1282 unsigned int st_shndx = sym->get_st_shndx();
24998053 1283 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
89fc3421
CC
1284
1285 Stringpool::Key ver_key = 0;
8781f709
ILT
1286 bool is_default_version = false;
1287 bool is_forced_local = false;
89fc3421
CC
1288
1289 if (ver != NULL)
1290 {
1291 ver = this->namepool_.add(ver, true, &ver_key);
1292 }
1293 // We don't want to assign a version to an undefined symbol,
1294 // even if it is listed in the version script. FIXME: What
1295 // about a common symbol?
1296 else
1297 {
1298 if (!this->version_script_.empty()
1299 && st_shndx != elfcpp::SHN_UNDEF)
1300 {
1301 // The symbol name did not have a version, but the
1302 // version script may assign a version anyway.
2ea97941 1303 std::string version;
98e090bd
ILT
1304 bool is_global;
1305 if (this->version_script_.get_symbol_version(name, &version,
1306 &is_global))
89fc3421 1307 {
98e090bd
ILT
1308 if (!is_global)
1309 is_forced_local = true;
1310 else if (!version.empty())
89fc3421 1311 {
2ea97941
ILT
1312 ver = this->namepool_.add_with_length(version.c_str(),
1313 version.length(),
89fc3421
CC
1314 true,
1315 &ver_key);
8781f709 1316 is_default_version = true;
89fc3421
CC
1317 }
1318 }
89fc3421
CC
1319 }
1320 }
1321
1322 Stringpool::Key name_key;
2ea97941 1323 name = this->namepool_.add(name, true, &name_key);
89fc3421
CC
1324
1325 Sized_symbol<size>* res;
2ea97941 1326 res = this->add_from_object(obj, name, name_key, ver, ver_key,
8781f709
ILT
1327 is_default_version, *sym, st_shndx,
1328 is_ordinary, st_shndx);
89fc3421 1329
8781f709 1330 if (is_forced_local)
0602e05a 1331 this->force_local(res);
89fc3421
CC
1332
1333 return res;
1334}
1335
dbe717ef
ILT
1336// Add all the symbols in a dynamic object to the hash table.
1337
1338template<int size, bool big_endian>
1339void
1340Symbol_table::add_from_dynobj(
1341 Sized_dynobj<size, big_endian>* dynobj,
1342 const unsigned char* syms,
1343 size_t count,
1344 const char* sym_names,
1345 size_t sym_name_size,
1346 const unsigned char* versym,
1347 size_t versym_size,
92de84a6 1348 const std::vector<const char*>* version_map,
6fa2a40b 1349 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
92de84a6 1350 size_t* defined)
dbe717ef 1351{
92de84a6
ILT
1352 *defined = 0;
1353
8851ecca 1354 gold_assert(size == parameters->target().get_size());
dbe717ef 1355
88dd47ac
ILT
1356 if (dynobj->just_symbols())
1357 {
1358 gold_error(_("--just-symbols does not make sense with a shared object"));
1359 return;
1360 }
1361
a7dac153
CC
1362 // FIXME: For incremental links, we don't store version information,
1363 // so we need to ignore version symbols for now.
1364 if (parameters->incremental_update())
1365 versym = NULL;
1366
dbe717ef
ILT
1367 if (versym != NULL && versym_size / 2 < count)
1368 {
75f2446e
ILT
1369 dynobj->error(_("too few symbol versions"));
1370 return;
dbe717ef
ILT
1371 }
1372
1373 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1374
aeddab66
ILT
1375 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1376 // weak aliases. This is necessary because if the dynamic object
1377 // provides the same variable under two names, one of which is a
1378 // weak definition, and the regular object refers to the weak
1379 // definition, we have to put both the weak definition and the
1380 // strong definition into the dynamic symbol table. Given a weak
1381 // definition, the only way that we can find the corresponding
1382 // strong definition, if any, is to search the symbol table.
1383 std::vector<Sized_symbol<size>*> object_symbols;
1384
dbe717ef
ILT
1385 const unsigned char* p = syms;
1386 const unsigned char* vs = versym;
1387 for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
1388 {
1389 elfcpp::Sym<size, big_endian> sym(p);
1390
92de84a6
ILT
1391 if (sympointers != NULL)
1392 (*sympointers)[i] = NULL;
1393
65778909
ILT
1394 // Ignore symbols with local binding or that have
1395 // internal or hidden visibility.
1396 if (sym.get_st_bind() == elfcpp::STB_LOCAL
1397 || sym.get_st_visibility() == elfcpp::STV_INTERNAL
1398 || sym.get_st_visibility() == elfcpp::STV_HIDDEN)
dbe717ef
ILT
1399 continue;
1400
8bdcdf2c
ILT
1401 // A protected symbol in a shared library must be treated as a
1402 // normal symbol when viewed from outside the shared library.
1403 // Implement this by overriding the visibility here.
1404 elfcpp::Sym<size, big_endian>* psym = &sym;
1405 unsigned char symbuf[sym_size];
1406 elfcpp::Sym<size, big_endian> sym2(symbuf);
1407 if (sym.get_st_visibility() == elfcpp::STV_PROTECTED)
1408 {
1409 memcpy(symbuf, p, sym_size);
1410 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1411 sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis());
1412 psym = &sym2;
1413 }
1414
1415 unsigned int st_name = psym->get_st_name();
dbe717ef
ILT
1416 if (st_name >= sym_name_size)
1417 {
75f2446e
ILT
1418 dynobj->error(_("bad symbol name offset %u at %zu"),
1419 st_name, i);
1420 continue;
dbe717ef
ILT
1421 }
1422
2ea97941 1423 const char* name = sym_names + st_name;
dbe717ef 1424
d491d34e 1425 bool is_ordinary;
8bdcdf2c 1426 unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(),
d491d34e
ILT
1427 &is_ordinary);
1428
92de84a6
ILT
1429 if (st_shndx != elfcpp::SHN_UNDEF)
1430 ++*defined;
1431
aeddab66
ILT
1432 Sized_symbol<size>* res;
1433
dbe717ef
ILT
1434 if (versym == NULL)
1435 {
1436 Stringpool::Key name_key;
2ea97941
ILT
1437 name = this->namepool_.add(name, true, &name_key);
1438 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1439 false, *psym, st_shndx, is_ordinary,
d491d34e 1440 st_shndx);
dbe717ef 1441 }
aeddab66
ILT
1442 else
1443 {
1444 // Read the version information.
dbe717ef 1445
aeddab66 1446 unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
dbe717ef 1447
aeddab66
ILT
1448 bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
1449 v &= elfcpp::VERSYM_VERSION;
dbe717ef 1450
aeddab66
ILT
1451 // The Sun documentation says that V can be VER_NDX_LOCAL,
1452 // or VER_NDX_GLOBAL, or a version index. The meaning of
1453 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1454 // The old GNU linker will happily generate VER_NDX_LOCAL
1455 // for an undefined symbol. I don't know what the Sun
1456 // linker will generate.
dbe717ef 1457
aeddab66 1458 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
d491d34e 1459 && st_shndx != elfcpp::SHN_UNDEF)
aeddab66
ILT
1460 {
1461 // This symbol should not be visible outside the object.
1462 continue;
1463 }
64707334 1464
aeddab66
ILT
1465 // At this point we are definitely going to add this symbol.
1466 Stringpool::Key name_key;
2ea97941 1467 name = this->namepool_.add(name, true, &name_key);
dbe717ef 1468
aeddab66
ILT
1469 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1470 || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
1471 {
1472 // This symbol does not have a version.
2ea97941 1473 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1474 false, *psym, st_shndx, is_ordinary,
d491d34e 1475 st_shndx);
aeddab66
ILT
1476 }
1477 else
1478 {
1479 if (v >= version_map->size())
1480 {
1481 dynobj->error(_("versym for symbol %zu out of range: %u"),
1482 i, v);
1483 continue;
1484 }
dbe717ef 1485
2ea97941
ILT
1486 const char* version = (*version_map)[v];
1487 if (version == NULL)
aeddab66
ILT
1488 {
1489 dynobj->error(_("versym for symbol %zu has no name: %u"),
1490 i, v);
1491 continue;
1492 }
dbe717ef 1493
aeddab66 1494 Stringpool::Key version_key;
2ea97941 1495 version = this->namepool_.add(version, true, &version_key);
aeddab66
ILT
1496
1497 // If this is an absolute symbol, and the version name
1498 // and symbol name are the same, then this is the
1499 // version definition symbol. These symbols exist to
1500 // support using -u to pull in particular versions. We
1501 // do not want to record a version for them.
d491d34e
ILT
1502 if (st_shndx == elfcpp::SHN_ABS
1503 && !is_ordinary
aeddab66 1504 && name_key == version_key)
2ea97941 1505 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1506 false, *psym, st_shndx, is_ordinary,
d491d34e 1507 st_shndx);
aeddab66
ILT
1508 else
1509 {
8781f709
ILT
1510 const bool is_default_version =
1511 !hidden && st_shndx != elfcpp::SHN_UNDEF;
2ea97941 1512 res = this->add_from_object(dynobj, name, name_key, version,
8781f709
ILT
1513 version_key, is_default_version,
1514 *psym, st_shndx,
d491d34e 1515 is_ordinary, st_shndx);
aeddab66
ILT
1516 }
1517 }
dbe717ef
ILT
1518 }
1519
99a37bfd 1520 // Note that it is possible that RES was overridden by an
a4bb589a 1521 // earlier object, in which case it can't be aliased here.
d491d34e
ILT
1522 if (st_shndx != elfcpp::SHN_UNDEF
1523 && is_ordinary
8bdcdf2c 1524 && psym->get_st_type() == elfcpp::STT_OBJECT
99a37bfd
ILT
1525 && res->source() == Symbol::FROM_OBJECT
1526 && res->object() == dynobj)
aeddab66 1527 object_symbols.push_back(res);
92de84a6
ILT
1528
1529 if (sympointers != NULL)
1530 (*sympointers)[i] = res;
aeddab66
ILT
1531 }
1532
1533 this->record_weak_aliases(&object_symbols);
1534}
1535
cdc29364
CC
1536// Add a symbol from a incremental object file.
1537
1538template<int size, bool big_endian>
26d3c67d 1539Sized_symbol<size>*
cdc29364
CC
1540Symbol_table::add_from_incrobj(
1541 Object* obj,
1542 const char* name,
1543 const char* ver,
1544 elfcpp::Sym<size, big_endian>* sym)
1545{
1546 unsigned int st_shndx = sym->get_st_shndx();
1547 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
1548
1549 Stringpool::Key ver_key = 0;
1550 bool is_default_version = false;
1551 bool is_forced_local = false;
1552
1553 Stringpool::Key name_key;
1554 name = this->namepool_.add(name, true, &name_key);
1555
1556 Sized_symbol<size>* res;
1557 res = this->add_from_object(obj, name, name_key, ver, ver_key,
1558 is_default_version, *sym, st_shndx,
1559 is_ordinary, st_shndx);
1560
1561 if (is_forced_local)
1562 this->force_local(res);
1563
1564 return res;
1565}
1566
aeddab66
ILT
1567// This is used to sort weak aliases. We sort them first by section
1568// index, then by offset, then by weak ahead of strong.
1569
1570template<int size>
1571class Weak_alias_sorter
1572{
1573 public:
1574 bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const;
1575};
1576
1577template<int size>
1578bool
1579Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1,
1580 const Sized_symbol<size>* s2) const
1581{
d491d34e
ILT
1582 bool is_ordinary;
1583 unsigned int s1_shndx = s1->shndx(&is_ordinary);
1584 gold_assert(is_ordinary);
1585 unsigned int s2_shndx = s2->shndx(&is_ordinary);
1586 gold_assert(is_ordinary);
1587 if (s1_shndx != s2_shndx)
1588 return s1_shndx < s2_shndx;
1589
aeddab66
ILT
1590 if (s1->value() != s2->value())
1591 return s1->value() < s2->value();
1592 if (s1->binding() != s2->binding())
1593 {
1594 if (s1->binding() == elfcpp::STB_WEAK)
1595 return true;
1596 if (s2->binding() == elfcpp::STB_WEAK)
1597 return false;
1598 }
1599 return std::string(s1->name()) < std::string(s2->name());
1600}
dbe717ef 1601
aeddab66
ILT
1602// SYMBOLS is a list of object symbols from a dynamic object. Look
1603// for any weak aliases, and record them so that if we add the weak
1604// alias to the dynamic symbol table, we also add the corresponding
1605// strong symbol.
dbe717ef 1606
aeddab66
ILT
1607template<int size>
1608void
1609Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols)
1610{
1611 // Sort the vector by section index, then by offset, then by weak
1612 // ahead of strong.
1613 std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>());
1614
1615 // Walk through the vector. For each weak definition, record
1616 // aliases.
1617 for (typename std::vector<Sized_symbol<size>*>::const_iterator p =
1618 symbols->begin();
1619 p != symbols->end();
1620 ++p)
1621 {
1622 if ((*p)->binding() != elfcpp::STB_WEAK)
1623 continue;
1624
1625 // Build a circular list of weak aliases. Each symbol points to
1626 // the next one in the circular list.
1627
1628 Sized_symbol<size>* from_sym = *p;
1629 typename std::vector<Sized_symbol<size>*>::const_iterator q;
1630 for (q = p + 1; q != symbols->end(); ++q)
dbe717ef 1631 {
d491d34e
ILT
1632 bool dummy;
1633 if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy)
aeddab66
ILT
1634 || (*q)->value() != from_sym->value())
1635 break;
1636
1637 this->weak_aliases_[from_sym] = *q;
1638 from_sym->set_has_alias();
1639 from_sym = *q;
dbe717ef
ILT
1640 }
1641
aeddab66
ILT
1642 if (from_sym != *p)
1643 {
1644 this->weak_aliases_[from_sym] = *p;
1645 from_sym->set_has_alias();
1646 }
dbe717ef 1647
aeddab66 1648 p = q - 1;
dbe717ef
ILT
1649 }
1650}
1651
ead1e424
ILT
1652// Create and return a specially defined symbol. If ONLY_IF_REF is
1653// true, then only create the symbol if there is a reference to it.
86f2e683 1654// If this does not return NULL, it sets *POLDSYM to the existing
8c500701
ILT
1655// symbol if there is one. This sets *RESOLVE_OLDSYM if we should
1656// resolve the newly created symbol to the old one. This
1657// canonicalizes *PNAME and *PVERSION.
ead1e424
ILT
1658
1659template<int size, bool big_endian>
1660Sized_symbol<size>*
9b07f471
ILT
1661Symbol_table::define_special_symbol(const char** pname, const char** pversion,
1662 bool only_if_ref,
8c500701 1663 Sized_symbol<size>** poldsym,
ca09d69a 1664 bool* resolve_oldsym)
ead1e424 1665{
8c500701 1666 *resolve_oldsym = false;
8cc69fb6 1667 *poldsym = NULL;
ead1e424 1668
55a93433
ILT
1669 // If the caller didn't give us a version, see if we get one from
1670 // the version script.
057ead22 1671 std::string v;
8c500701 1672 bool is_default_version = false;
55a93433
ILT
1673 if (*pversion == NULL)
1674 {
98e090bd
ILT
1675 bool is_global;
1676 if (this->version_script_.get_symbol_version(*pname, &v, &is_global))
057ead22 1677 {
98e090bd
ILT
1678 if (is_global && !v.empty())
1679 {
1680 *pversion = v.c_str();
1681 // If we get the version from a version script, then we
1682 // are also the default version.
1683 is_default_version = true;
1684 }
057ead22 1685 }
55a93433
ILT
1686 }
1687
8c500701
ILT
1688 Symbol* oldsym;
1689 Sized_symbol<size>* sym;
1690
1691 bool add_to_table = false;
1692 typename Symbol_table_type::iterator add_loc = this->table_.end();
1693 bool add_def_to_table = false;
1694 typename Symbol_table_type::iterator add_def_loc = this->table_.end();
1695
ead1e424
ILT
1696 if (only_if_ref)
1697 {
306d9ef0 1698 oldsym = this->lookup(*pname, *pversion);
8c500701
ILT
1699 if (oldsym == NULL && is_default_version)
1700 oldsym = this->lookup(*pname, NULL);
f6ce93d6 1701 if (oldsym == NULL || !oldsym->is_undefined())
ead1e424 1702 return NULL;
306d9ef0
ILT
1703
1704 *pname = oldsym->name();
eebd87a5
ILT
1705 if (is_default_version)
1706 *pversion = this->namepool_.add(*pversion, true, NULL);
1707 else
8c500701 1708 *pversion = oldsym->version();
ead1e424
ILT
1709 }
1710 else
1711 {
14b31740 1712 // Canonicalize NAME and VERSION.
f0641a0b 1713 Stringpool::Key name_key;
cfd73a4e 1714 *pname = this->namepool_.add(*pname, true, &name_key);
ead1e424 1715
14b31740 1716 Stringpool::Key version_key = 0;
306d9ef0 1717 if (*pversion != NULL)
cfd73a4e 1718 *pversion = this->namepool_.add(*pversion, true, &version_key);
14b31740 1719
ead1e424 1720 Symbol* const snull = NULL;
ead1e424 1721 std::pair<typename Symbol_table_type::iterator, bool> ins =
14b31740
ILT
1722 this->table_.insert(std::make_pair(std::make_pair(name_key,
1723 version_key),
ead1e424
ILT
1724 snull));
1725
8781f709 1726 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
8c500701
ILT
1727 std::make_pair(this->table_.end(), false);
1728 if (is_default_version)
1729 {
1730 const Stringpool::Key vnull = 0;
8781f709
ILT
1731 insdefault =
1732 this->table_.insert(std::make_pair(std::make_pair(name_key,
1733 vnull),
1734 snull));
8c500701
ILT
1735 }
1736
ead1e424
ILT
1737 if (!ins.second)
1738 {
14b31740 1739 // We already have a symbol table entry for NAME/VERSION.
ead1e424 1740 oldsym = ins.first->second;
a3ad94ed 1741 gold_assert(oldsym != NULL);
8c500701
ILT
1742
1743 if (is_default_version)
1744 {
1745 Sized_symbol<size>* soldsym =
1746 this->get_sized_symbol<size>(oldsym);
1747 this->define_default_version<size, big_endian>(soldsym,
8781f709
ILT
1748 insdefault.second,
1749 insdefault.first);
8c500701 1750 }
ead1e424
ILT
1751 }
1752 else
1753 {
1754 // We haven't seen this symbol before.
a3ad94ed 1755 gold_assert(ins.first->second == NULL);
8c500701
ILT
1756
1757 add_to_table = true;
1758 add_loc = ins.first;
1759
8781f709 1760 if (is_default_version && !insdefault.second)
8c500701
ILT
1761 {
1762 // We are adding NAME/VERSION, and it is the default
1763 // version. We already have an entry for NAME/NULL.
8781f709 1764 oldsym = insdefault.first->second;
8c500701
ILT
1765 *resolve_oldsym = true;
1766 }
1767 else
1768 {
1769 oldsym = NULL;
1770
1771 if (is_default_version)
1772 {
1773 add_def_to_table = true;
8781f709 1774 add_def_loc = insdefault.first;
8c500701
ILT
1775 }
1776 }
ead1e424
ILT
1777 }
1778 }
1779
8851ecca
ILT
1780 const Target& target = parameters->target();
1781 if (!target.has_make_symbol())
86f2e683
ILT
1782 sym = new Sized_symbol<size>();
1783 else
ead1e424 1784 {
029ba973
ILT
1785 Sized_target<size, big_endian>* sized_target =
1786 parameters->sized_target<size, big_endian>();
86f2e683
ILT
1787 sym = sized_target->make_symbol();
1788 if (sym == NULL)
1789 return NULL;
1790 }
ead1e424 1791
86f2e683
ILT
1792 if (add_to_table)
1793 add_loc->second = sym;
1794 else
1795 gold_assert(oldsym != NULL);
ead1e424 1796
8c500701
ILT
1797 if (add_def_to_table)
1798 add_def_loc->second = sym;
1799
7d1a9ebb 1800 *poldsym = this->get_sized_symbol<size>(oldsym);
ead1e424
ILT
1801
1802 return sym;
1803}
1804
1805// Define a symbol based on an Output_data.
1806
14b31740 1807Symbol*
2ea97941
ILT
1808Symbol_table::define_in_output_data(const char* name,
1809 const char* version,
99fff23b 1810 Defined defined,
9b07f471 1811 Output_data* od,
2ea97941
ILT
1812 uint64_t value,
1813 uint64_t symsize,
9b07f471
ILT
1814 elfcpp::STT type,
1815 elfcpp::STB binding,
ead1e424
ILT
1816 elfcpp::STV visibility,
1817 unsigned char nonvis,
2ea97941 1818 bool offset_is_from_end,
ead1e424
ILT
1819 bool only_if_ref)
1820{
8851ecca 1821 if (parameters->target().get_size() == 32)
86f2e683
ILT
1822 {
1823#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1824 return this->do_define_in_output_data<32>(name, version, defined, od,
2ea97941 1825 value, symsize, type, binding,
86f2e683 1826 visibility, nonvis,
2ea97941 1827 offset_is_from_end,
86f2e683
ILT
1828 only_if_ref);
1829#else
1830 gold_unreachable();
1831#endif
1832 }
8851ecca 1833 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1834 {
1835#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1836 return this->do_define_in_output_data<64>(name, version, defined, od,
2ea97941 1837 value, symsize, type, binding,
86f2e683 1838 visibility, nonvis,
2ea97941 1839 offset_is_from_end,
86f2e683
ILT
1840 only_if_ref);
1841#else
1842 gold_unreachable();
1843#endif
1844 }
ead1e424 1845 else
a3ad94ed 1846 gold_unreachable();
ead1e424
ILT
1847}
1848
1849// Define a symbol in an Output_data, sized version.
1850
1851template<int size>
14b31740 1852Sized_symbol<size>*
ead1e424 1853Symbol_table::do_define_in_output_data(
2ea97941
ILT
1854 const char* name,
1855 const char* version,
99fff23b 1856 Defined defined,
ead1e424 1857 Output_data* od,
2ea97941
ILT
1858 typename elfcpp::Elf_types<size>::Elf_Addr value,
1859 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1860 elfcpp::STT type,
1861 elfcpp::STB binding,
1862 elfcpp::STV visibility,
1863 unsigned char nonvis,
2ea97941 1864 bool offset_is_from_end,
ead1e424
ILT
1865 bool only_if_ref)
1866{
1867 Sized_symbol<size>* sym;
86f2e683 1868 Sized_symbol<size>* oldsym;
8c500701 1869 bool resolve_oldsym;
ead1e424 1870
8851ecca 1871 if (parameters->target().is_big_endian())
193a53d9
ILT
1872 {
1873#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 1874 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
1875 only_if_ref, &oldsym,
1876 &resolve_oldsym);
193a53d9
ILT
1877#else
1878 gold_unreachable();
1879#endif
1880 }
ead1e424 1881 else
193a53d9
ILT
1882 {
1883#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 1884 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
1885 only_if_ref, &oldsym,
1886 &resolve_oldsym);
193a53d9
ILT
1887#else
1888 gold_unreachable();
1889#endif
1890 }
ead1e424
ILT
1891
1892 if (sym == NULL)
14b31740 1893 return NULL;
ead1e424 1894
2ea97941 1895 sym->init_output_data(name, version, od, value, symsize, type, binding,
5146f448
CC
1896 visibility, nonvis, offset_is_from_end,
1897 defined == PREDEFINED);
14b31740 1898
e5756efb 1899 if (oldsym == NULL)
55a93433
ILT
1900 {
1901 if (binding == elfcpp::STB_LOCAL
2ea97941 1902 || this->version_script_.symbol_is_local(name))
55a93433 1903 this->force_local(sym);
2ea97941 1904 else if (version != NULL)
75517b77 1905 sym->set_is_default();
55a93433
ILT
1906 return sym;
1907 }
86f2e683 1908
62855347 1909 if (Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 1910 this->override_with_special(oldsym, sym);
8c500701
ILT
1911
1912 if (resolve_oldsym)
1913 return sym;
1914 else
1915 {
1916 delete sym;
1917 return oldsym;
1918 }
ead1e424
ILT
1919}
1920
1921// Define a symbol based on an Output_segment.
1922
14b31740 1923Symbol*
2ea97941 1924Symbol_table::define_in_output_segment(const char* name,
99fff23b
ILT
1925 const char* version,
1926 Defined defined,
1927 Output_segment* os,
2ea97941
ILT
1928 uint64_t value,
1929 uint64_t symsize,
9b07f471
ILT
1930 elfcpp::STT type,
1931 elfcpp::STB binding,
ead1e424
ILT
1932 elfcpp::STV visibility,
1933 unsigned char nonvis,
2ea97941 1934 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1935 bool only_if_ref)
1936{
8851ecca 1937 if (parameters->target().get_size() == 32)
86f2e683
ILT
1938 {
1939#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1940 return this->do_define_in_output_segment<32>(name, version, defined, os,
2ea97941 1941 value, symsize, type,
86f2e683 1942 binding, visibility, nonvis,
2ea97941 1943 offset_base, only_if_ref);
86f2e683
ILT
1944#else
1945 gold_unreachable();
1946#endif
1947 }
8851ecca 1948 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1949 {
1950#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1951 return this->do_define_in_output_segment<64>(name, version, defined, os,
2ea97941 1952 value, symsize, type,
86f2e683 1953 binding, visibility, nonvis,
2ea97941 1954 offset_base, only_if_ref);
86f2e683
ILT
1955#else
1956 gold_unreachable();
1957#endif
1958 }
ead1e424 1959 else
a3ad94ed 1960 gold_unreachable();
ead1e424
ILT
1961}
1962
1963// Define a symbol in an Output_segment, sized version.
1964
1965template<int size>
14b31740 1966Sized_symbol<size>*
ead1e424 1967Symbol_table::do_define_in_output_segment(
2ea97941
ILT
1968 const char* name,
1969 const char* version,
99fff23b 1970 Defined defined,
ead1e424 1971 Output_segment* os,
2ea97941
ILT
1972 typename elfcpp::Elf_types<size>::Elf_Addr value,
1973 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1974 elfcpp::STT type,
1975 elfcpp::STB binding,
1976 elfcpp::STV visibility,
1977 unsigned char nonvis,
2ea97941 1978 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1979 bool only_if_ref)
1980{
1981 Sized_symbol<size>* sym;
86f2e683 1982 Sized_symbol<size>* oldsym;
8c500701 1983 bool resolve_oldsym;
ead1e424 1984
8851ecca 1985 if (parameters->target().is_big_endian())
9025d29d
ILT
1986 {
1987#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 1988 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
1989 only_if_ref, &oldsym,
1990 &resolve_oldsym);
9025d29d
ILT
1991#else
1992 gold_unreachable();
1993#endif
1994 }
ead1e424 1995 else
9025d29d
ILT
1996 {
1997#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 1998 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
1999 only_if_ref, &oldsym,
2000 &resolve_oldsym);
9025d29d
ILT
2001#else
2002 gold_unreachable();
2003#endif
2004 }
ead1e424
ILT
2005
2006 if (sym == NULL)
14b31740 2007 return NULL;
ead1e424 2008
2ea97941 2009 sym->init_output_segment(name, version, os, value, symsize, type, binding,
5146f448
CC
2010 visibility, nonvis, offset_base,
2011 defined == PREDEFINED);
14b31740 2012
e5756efb 2013 if (oldsym == NULL)
55a93433
ILT
2014 {
2015 if (binding == elfcpp::STB_LOCAL
2ea97941 2016 || this->version_script_.symbol_is_local(name))
55a93433 2017 this->force_local(sym);
2ea97941 2018 else if (version != NULL)
75517b77 2019 sym->set_is_default();
55a93433
ILT
2020 return sym;
2021 }
86f2e683 2022
62855347 2023 if (Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 2024 this->override_with_special(oldsym, sym);
8c500701
ILT
2025
2026 if (resolve_oldsym)
2027 return sym;
2028 else
2029 {
2030 delete sym;
2031 return oldsym;
2032 }
ead1e424
ILT
2033}
2034
2035// Define a special symbol with a constant value. It is a multiple
2036// definition error if this symbol is already defined.
2037
14b31740 2038Symbol*
2ea97941
ILT
2039Symbol_table::define_as_constant(const char* name,
2040 const char* version,
99fff23b 2041 Defined defined,
2ea97941
ILT
2042 uint64_t value,
2043 uint64_t symsize,
9b07f471
ILT
2044 elfcpp::STT type,
2045 elfcpp::STB binding,
2046 elfcpp::STV visibility,
2047 unsigned char nonvis,
caa9d5d9
ILT
2048 bool only_if_ref,
2049 bool force_override)
ead1e424 2050{
8851ecca 2051 if (parameters->target().get_size() == 32)
86f2e683
ILT
2052 {
2053#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 2054 return this->do_define_as_constant<32>(name, version, defined, value,
2ea97941 2055 symsize, type, binding,
caa9d5d9
ILT
2056 visibility, nonvis, only_if_ref,
2057 force_override);
86f2e683
ILT
2058#else
2059 gold_unreachable();
2060#endif
2061 }
8851ecca 2062 else if (parameters->target().get_size() == 64)
86f2e683
ILT
2063 {
2064#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 2065 return this->do_define_as_constant<64>(name, version, defined, value,
2ea97941 2066 symsize, type, binding,
caa9d5d9
ILT
2067 visibility, nonvis, only_if_ref,
2068 force_override);
86f2e683
ILT
2069#else
2070 gold_unreachable();
2071#endif
2072 }
ead1e424 2073 else
a3ad94ed 2074 gold_unreachable();
ead1e424
ILT
2075}
2076
2077// Define a symbol as a constant, sized version.
2078
2079template<int size>
14b31740 2080Sized_symbol<size>*
ead1e424 2081Symbol_table::do_define_as_constant(
2ea97941
ILT
2082 const char* name,
2083 const char* version,
99fff23b 2084 Defined defined,
2ea97941
ILT
2085 typename elfcpp::Elf_types<size>::Elf_Addr value,
2086 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
2087 elfcpp::STT type,
2088 elfcpp::STB binding,
2089 elfcpp::STV visibility,
2090 unsigned char nonvis,
caa9d5d9
ILT
2091 bool only_if_ref,
2092 bool force_override)
ead1e424
ILT
2093{
2094 Sized_symbol<size>* sym;
86f2e683 2095 Sized_symbol<size>* oldsym;
8c500701 2096 bool resolve_oldsym;
ead1e424 2097
8851ecca 2098 if (parameters->target().is_big_endian())
9025d29d
ILT
2099 {
2100#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 2101 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
2102 only_if_ref, &oldsym,
2103 &resolve_oldsym);
9025d29d
ILT
2104#else
2105 gold_unreachable();
2106#endif
2107 }
ead1e424 2108 else
9025d29d
ILT
2109 {
2110#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 2111 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
2112 only_if_ref, &oldsym,
2113 &resolve_oldsym);
9025d29d
ILT
2114#else
2115 gold_unreachable();
2116#endif
2117 }
ead1e424
ILT
2118
2119 if (sym == NULL)
14b31740 2120 return NULL;
ead1e424 2121
2ea97941 2122 sym->init_constant(name, version, value, symsize, type, binding, visibility,
5146f448 2123 nonvis, defined == PREDEFINED);
14b31740 2124
e5756efb 2125 if (oldsym == NULL)
55a93433 2126 {
686c8caf
ILT
2127 // Version symbols are absolute symbols with name == version.
2128 // We don't want to force them to be local.
2ea97941
ILT
2129 if ((version == NULL
2130 || name != version
2131 || value != 0)
686c8caf 2132 && (binding == elfcpp::STB_LOCAL
2ea97941 2133 || this->version_script_.symbol_is_local(name)))
55a93433 2134 this->force_local(sym);
2ea97941
ILT
2135 else if (version != NULL
2136 && (name != version || value != 0))
75517b77 2137 sym->set_is_default();
55a93433
ILT
2138 return sym;
2139 }
86f2e683 2140
99fff23b 2141 if (force_override
62855347 2142 || Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 2143 this->override_with_special(oldsym, sym);
8c500701
ILT
2144
2145 if (resolve_oldsym)
2146 return sym;
2147 else
2148 {
2149 delete sym;
2150 return oldsym;
2151 }
ead1e424
ILT
2152}
2153
2154// Define a set of symbols in output sections.
2155
2156void
9b07f471 2157Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2158 const Define_symbol_in_section* p,
2159 bool only_if_ref)
ead1e424
ILT
2160{
2161 for (int i = 0; i < count; ++i, ++p)
2162 {
2163 Output_section* os = layout->find_output_section(p->output_section);
2164 if (os != NULL)
99fff23b 2165 this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2166 p->size, p->type, p->binding,
2167 p->visibility, p->nonvis,
a445fddf
ILT
2168 p->offset_is_from_end,
2169 only_if_ref || p->only_if_ref);
ead1e424 2170 else
99fff23b
ILT
2171 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2172 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2173 only_if_ref || p->only_if_ref,
2174 false);
ead1e424
ILT
2175 }
2176}
2177
2178// Define a set of symbols in output segments.
2179
2180void
9b07f471 2181Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2182 const Define_symbol_in_segment* p,
2183 bool only_if_ref)
ead1e424
ILT
2184{
2185 for (int i = 0; i < count; ++i, ++p)
2186 {
2187 Output_segment* os = layout->find_output_segment(p->segment_type,
2188 p->segment_flags_set,
2189 p->segment_flags_clear);
2190 if (os != NULL)
99fff23b 2191 this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2192 p->size, p->type, p->binding,
2193 p->visibility, p->nonvis,
a445fddf
ILT
2194 p->offset_base,
2195 only_if_ref || p->only_if_ref);
ead1e424 2196 else
99fff23b
ILT
2197 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2198 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2199 only_if_ref || p->only_if_ref,
2200 false);
ead1e424
ILT
2201 }
2202}
2203
46fe1623
ILT
2204// Define CSYM using a COPY reloc. POSD is the Output_data where the
2205// symbol should be defined--typically a .dyn.bss section. VALUE is
2206// the offset within POSD.
2207
2208template<int size>
2209void
fe8718a4 2210Symbol_table::define_with_copy_reloc(
fe8718a4
ILT
2211 Sized_symbol<size>* csym,
2212 Output_data* posd,
2ea97941 2213 typename elfcpp::Elf_types<size>::Elf_Addr value)
46fe1623
ILT
2214{
2215 gold_assert(csym->is_from_dynobj());
2216 gold_assert(!csym->is_copied_from_dynobj());
2ea97941
ILT
2217 Object* object = csym->object();
2218 gold_assert(object->is_dynamic());
2219 Dynobj* dynobj = static_cast<Dynobj*>(object);
46fe1623
ILT
2220
2221 // Our copied variable has to override any variable in a shared
2222 // library.
2223 elfcpp::STB binding = csym->binding();
2224 if (binding == elfcpp::STB_WEAK)
2225 binding = elfcpp::STB_GLOBAL;
2226
99fff23b 2227 this->define_in_output_data(csym->name(), csym->version(), COPY,
2ea97941 2228 posd, value, csym->symsize(),
46fe1623
ILT
2229 csym->type(), binding,
2230 csym->visibility(), csym->nonvis(),
2231 false, false);
2232
2233 csym->set_is_copied_from_dynobj();
2234 csym->set_needs_dynsym_entry();
2235
2236 this->copied_symbol_dynobjs_[csym] = dynobj;
2237
2238 // We have now defined all aliases, but we have not entered them all
2239 // in the copied_symbol_dynobjs_ map.
2240 if (csym->has_alias())
2241 {
2242 Symbol* sym = csym;
2243 while (true)
2244 {
2245 sym = this->weak_aliases_[sym];
2246 if (sym == csym)
2247 break;
2248 gold_assert(sym->output_data() == posd);
2249
2250 sym->set_is_copied_from_dynobj();
2251 this->copied_symbol_dynobjs_[sym] = dynobj;
2252 }
2253 }
2254}
2255
2256// SYM is defined using a COPY reloc. Return the dynamic object where
2257// the original definition was found.
2258
2259Dynobj*
2260Symbol_table::get_copy_source(const Symbol* sym) const
2261{
2262 gold_assert(sym->is_copied_from_dynobj());
2263 Copied_symbol_dynobjs::const_iterator p =
2264 this->copied_symbol_dynobjs_.find(sym);
2265 gold_assert(p != this->copied_symbol_dynobjs_.end());
2266 return p->second;
2267}
2268
f3e9c5c5
ILT
2269// Add any undefined symbols named on the command line.
2270
2271void
88a4108b 2272Symbol_table::add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5 2273{
88a4108b
ILT
2274 if (parameters->options().any_undefined()
2275 || layout->script_options()->any_unreferenced())
f3e9c5c5
ILT
2276 {
2277 if (parameters->target().get_size() == 32)
2278 {
5adf9721 2279#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
88a4108b 2280 this->do_add_undefined_symbols_from_command_line<32>(layout);
f3e9c5c5
ILT
2281#else
2282 gold_unreachable();
2283#endif
2284 }
2285 else if (parameters->target().get_size() == 64)
2286 {
2287#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
88a4108b 2288 this->do_add_undefined_symbols_from_command_line<64>(layout);
f3e9c5c5
ILT
2289#else
2290 gold_unreachable();
2291#endif
2292 }
2293 else
2294 gold_unreachable();
2295 }
2296}
2297
2298template<int size>
2299void
88a4108b 2300Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5
ILT
2301{
2302 for (options::String_set::const_iterator p =
2303 parameters->options().undefined_begin();
2304 p != parameters->options().undefined_end();
2305 ++p)
88a4108b 2306 this->add_undefined_symbol_from_command_line<size>(p->c_str());
f3e9c5c5 2307
31821be0
CC
2308 for (options::String_set::const_iterator p =
2309 parameters->options().export_dynamic_symbol_begin();
2310 p != parameters->options().export_dynamic_symbol_end();
2311 ++p)
2312 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2313
88a4108b
ILT
2314 for (Script_options::referenced_const_iterator p =
2315 layout->script_options()->referenced_begin();
2316 p != layout->script_options()->referenced_end();
2317 ++p)
2318 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2319}
2320
2321template<int size>
2322void
2323Symbol_table::add_undefined_symbol_from_command_line(const char* name)
2324{
2325 if (this->lookup(name) != NULL)
2326 return;
f3e9c5c5 2327
88a4108b 2328 const char* version = NULL;
f3e9c5c5 2329
88a4108b
ILT
2330 Sized_symbol<size>* sym;
2331 Sized_symbol<size>* oldsym;
2332 bool resolve_oldsym;
2333 if (parameters->target().is_big_endian())
2334 {
f3e9c5c5 2335#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
88a4108b
ILT
2336 sym = this->define_special_symbol<size, true>(&name, &version,
2337 false, &oldsym,
2338 &resolve_oldsym);
f3e9c5c5 2339#else
88a4108b 2340 gold_unreachable();
f3e9c5c5 2341#endif
88a4108b
ILT
2342 }
2343 else
2344 {
f3e9c5c5 2345#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
88a4108b
ILT
2346 sym = this->define_special_symbol<size, false>(&name, &version,
2347 false, &oldsym,
2348 &resolve_oldsym);
f3e9c5c5 2349#else
88a4108b 2350 gold_unreachable();
f3e9c5c5 2351#endif
88a4108b 2352 }
f3e9c5c5 2353
88a4108b 2354 gold_assert(oldsym == NULL);
f3e9c5c5 2355
88a4108b
ILT
2356 sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
2357 elfcpp::STV_DEFAULT, 0);
2358 ++this->saw_undefined_;
f3e9c5c5
ILT
2359}
2360
a3ad94ed
ILT
2361// Set the dynamic symbol indexes. INDEX is the index of the first
2362// global dynamic symbol. Pointers to the symbols are stored into the
2363// vector SYMS. The names are added to DYNPOOL. This returns an
2364// updated dynamic symbol index.
2365
2366unsigned int
9b07f471 2367Symbol_table::set_dynsym_indexes(unsigned int index,
a3ad94ed 2368 std::vector<Symbol*>* syms,
14b31740
ILT
2369 Stringpool* dynpool,
2370 Versions* versions)
a3ad94ed 2371{
32e2b61d
AM
2372 std::vector<Symbol*> as_needed_sym;
2373
98ff9231
CC
2374 // Allow a target to set dynsym indexes.
2375 if (parameters->target().has_custom_set_dynsym_indexes())
2376 {
2377 std::vector<Symbol*> dyn_symbols;
2378 for (Symbol_table_type::iterator p = this->table_.begin();
2379 p != this->table_.end();
2380 ++p)
2381 {
2382 Symbol* sym = p->second;
2383 if (!sym->should_add_dynsym_entry(this))
2384 sym->set_dynsym_index(-1U);
2385 else
2386 dyn_symbols.push_back(sym);
2387 }
2388
2389 return parameters->target().set_dynsym_indexes(&dyn_symbols, index, syms,
2390 dynpool, versions, this);
2391 }
2392
a3ad94ed
ILT
2393 for (Symbol_table_type::iterator p = this->table_.begin();
2394 p != this->table_.end();
2395 ++p)
2396 {
2397 Symbol* sym = p->second;
16649710
ILT
2398
2399 // Note that SYM may already have a dynamic symbol index, since
2400 // some symbols appear more than once in the symbol table, with
2401 // and without a version.
2402
ce97fa81 2403 if (!sym->should_add_dynsym_entry(this))
16649710
ILT
2404 sym->set_dynsym_index(-1U);
2405 else if (!sym->has_dynsym_index())
a3ad94ed
ILT
2406 {
2407 sym->set_dynsym_index(index);
2408 ++index;
2409 syms->push_back(sym);
cfd73a4e 2410 dynpool->add(sym->name(), false, NULL);
14b31740 2411
594c8e5e 2412 // If the symbol is defined in a dynamic object and is
32e2b61d
AM
2413 // referenced strongly in a regular object, then mark the
2414 // dynamic object as needed. This is used to implement
2415 // --as-needed.
2416 if (sym->is_from_dynobj()
2417 && sym->in_reg()
2418 && !sym->is_undef_binding_weak())
594c8e5e 2419 sym->object()->set_is_needed();
32e2b61d
AM
2420
2421 // Record any version information, except those from
2422 // as-needed libraries not seen to be needed. Note that the
2423 // is_needed state for such libraries can change in this loop.
2424 if (sym->version() != NULL)
2425 {
2426 if (!sym->is_from_dynobj()
2427 || !sym->object()->as_needed()
2428 || sym->object()->is_needed())
2429 versions->record_version(this, dynpool, sym);
2430 else
2431 as_needed_sym.push_back(sym);
2432 }
a3ad94ed
ILT
2433 }
2434 }
2435
32e2b61d
AM
2436 // Process version information for symbols from as-needed libraries.
2437 for (std::vector<Symbol*>::iterator p = as_needed_sym.begin();
2438 p != as_needed_sym.end();
2439 ++p)
2440 {
2441 Symbol* sym = *p;
2442
2443 if (sym->object()->is_needed())
2444 versions->record_version(this, dynpool, sym);
2445 else
2446 sym->clear_version();
2447 }
2448
14b31740
ILT
2449 // Finish up the versions. In some cases this may add new dynamic
2450 // symbols.
9b07f471 2451 index = versions->finalize(this, index, syms);
14b31740 2452
a3ad94ed
ILT
2453 return index;
2454}
2455
c06b7b0b 2456// Set the final values for all the symbols. The index of the first
55a93433
ILT
2457// global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
2458// file offset OFF. Add their names to POOL. Return the new file
2459// offset. Update *PLOCAL_SYMCOUNT if necessary.
54dc6425 2460
75f65a3e 2461off_t
55a93433
ILT
2462Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
2463 size_t dyncount, Stringpool* pool,
ca09d69a 2464 unsigned int* plocal_symcount)
54dc6425 2465{
f6ce93d6
ILT
2466 off_t ret;
2467
55a93433
ILT
2468 gold_assert(*plocal_symcount != 0);
2469 this->first_global_index_ = *plocal_symcount;
c06b7b0b 2470
16649710
ILT
2471 this->dynamic_offset_ = dynoff;
2472 this->first_dynamic_global_index_ = dyn_global_index;
2473 this->dynamic_count_ = dyncount;
2474
8851ecca 2475 if (parameters->target().get_size() == 32)
9025d29d
ILT
2476 {
2477#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
55a93433 2478 ret = this->sized_finalize<32>(off, pool, plocal_symcount);
9025d29d
ILT
2479#else
2480 gold_unreachable();
2481#endif
2482 }
8851ecca 2483 else if (parameters->target().get_size() == 64)
9025d29d
ILT
2484 {
2485#if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
55a93433 2486 ret = this->sized_finalize<64>(off, pool, plocal_symcount);
9025d29d
ILT
2487#else
2488 gold_unreachable();
2489#endif
2490 }
61ba1cf9 2491 else
a3ad94ed 2492 gold_unreachable();
f6ce93d6
ILT
2493
2494 // Now that we have the final symbol table, we can reliably note
2495 // which symbols should get warnings.
cb295612 2496 this->warnings_.note_warnings(this);
f6ce93d6
ILT
2497
2498 return ret;
75f65a3e
ILT
2499}
2500
55a93433
ILT
2501// SYM is going into the symbol table at *PINDEX. Add the name to
2502// POOL, update *PINDEX and *POFF.
2503
2504template<int size>
2505void
2506Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool,
2507 unsigned int* pindex, off_t* poff)
2508{
2509 sym->set_symtab_index(*pindex);
6d1c4efb
ILT
2510 if (sym->version() == NULL || !parameters->options().relocatable())
2511 pool->add(sym->name(), false, NULL);
2512 else
2513 pool->add(sym->versioned_name(), true, NULL);
55a93433
ILT
2514 ++*pindex;
2515 *poff += elfcpp::Elf_sizes<size>::sym_size;
2516}
2517
ead1e424
ILT
2518// Set the final value for all the symbols. This is called after
2519// Layout::finalize, so all the output sections have their final
2520// address.
75f65a3e
ILT
2521
2522template<int size>
2523off_t
55a93433
ILT
2524Symbol_table::sized_finalize(off_t off, Stringpool* pool,
2525 unsigned int* plocal_symcount)
75f65a3e 2526{
ead1e424 2527 off = align_address(off, size >> 3);
75f65a3e
ILT
2528 this->offset_ = off;
2529
55a93433
ILT
2530 unsigned int index = *plocal_symcount;
2531 const unsigned int orig_index = index;
c06b7b0b 2532
55a93433
ILT
2533 // First do all the symbols which have been forced to be local, as
2534 // they must appear before all global symbols.
2535 for (Forced_locals::iterator p = this->forced_locals_.begin();
2536 p != this->forced_locals_.end();
2537 ++p)
2538 {
2539 Symbol* sym = *p;
2540 gold_assert(sym->is_forced_local());
2541 if (this->sized_finalize_symbol<size>(sym))
2542 {
2543 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2544 ++*plocal_symcount;
2545 }
2546 }
2547
2548 // Now do all the remaining symbols.
c06b7b0b
ILT
2549 for (Symbol_table_type::iterator p = this->table_.begin();
2550 p != this->table_.end();
2551 ++p)
54dc6425 2552 {
55a93433
ILT
2553 Symbol* sym = p->second;
2554 if (this->sized_finalize_symbol<size>(sym))
2555 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2556 }
54dc6425 2557
55a93433 2558 this->output_count_ = index - orig_index;
a3ad94ed 2559
55a93433
ILT
2560 return off;
2561}
75f65a3e 2562
c0a62865
DK
2563// Compute the final value of SYM and store status in location PSTATUS.
2564// During relaxation, this may be called multiple times for a symbol to
2565// compute its would-be final value in each relaxation pass.
008db82e 2566
55a93433 2567template<int size>
c0a62865
DK
2568typename Sized_symbol<size>::Value_type
2569Symbol_table::compute_final_value(
2570 const Sized_symbol<size>* sym,
2571 Compute_final_value_status* pstatus) const
55a93433 2572{
ef9beddf 2573 typedef typename Sized_symbol<size>::Value_type Value_type;
2ea97941 2574 Value_type value;
ead1e424 2575
55a93433
ILT
2576 switch (sym->source())
2577 {
2578 case Symbol::FROM_OBJECT:
2579 {
d491d34e 2580 bool is_ordinary;
2ea97941 2581 unsigned int shndx = sym->shndx(&is_ordinary);
ead1e424 2582
d491d34e 2583 if (!is_ordinary
2ea97941
ILT
2584 && shndx != elfcpp::SHN_ABS
2585 && !Symbol::is_common_shndx(shndx))
55a93433 2586 {
c0a62865
DK
2587 *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION;
2588 return 0;
ead1e424 2589 }
ead1e424 2590
55a93433
ILT
2591 Object* symobj = sym->object();
2592 if (symobj->is_dynamic())
ead1e424 2593 {
2ea97941
ILT
2594 value = 0;
2595 shndx = elfcpp::SHN_UNDEF;
ead1e424 2596 }
89fc3421
CC
2597 else if (symobj->pluginobj() != NULL)
2598 {
2ea97941
ILT
2599 value = 0;
2600 shndx = elfcpp::SHN_UNDEF;
89fc3421 2601 }
2ea97941
ILT
2602 else if (shndx == elfcpp::SHN_UNDEF)
2603 value = 0;
d491d34e 2604 else if (!is_ordinary
2ea97941
ILT
2605 && (shndx == elfcpp::SHN_ABS
2606 || Symbol::is_common_shndx(shndx)))
2607 value = sym->value();
55a93433 2608 else
ead1e424 2609 {
55a93433 2610 Relobj* relobj = static_cast<Relobj*>(symobj);
2ea97941 2611 Output_section* os = relobj->output_section(shndx);
55a93433 2612
2ea97941 2613 if (this->is_section_folded(relobj, shndx))
ef15dade
ST
2614 {
2615 gold_assert(os == NULL);
2616 // Get the os of the section it is folded onto.
2617 Section_id folded = this->icf_->get_folded_section(relobj,
2ea97941 2618 shndx);
ef15dade
ST
2619 gold_assert(folded.first != NULL);
2620 Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first);
d6344fb5
DK
2621 unsigned folded_shndx = folded.second;
2622
2623 os = folded_obj->output_section(folded_shndx);
ef15dade 2624 gold_assert(os != NULL);
d6344fb5
DK
2625
2626 // Replace (relobj, shndx) with canonical ICF input section.
2627 shndx = folded_shndx;
2628 relobj = folded_obj;
ef15dade
ST
2629 }
2630
d6344fb5 2631 uint64_t secoff64 = relobj->output_section_offset(shndx);
ef15dade 2632 if (os == NULL)
ead1e424 2633 {
6d03d481
ST
2634 bool static_or_reloc = (parameters->doing_static_link() ||
2635 parameters->options().relocatable());
2636 gold_assert(static_or_reloc || sym->dynsym_index() == -1U);
2637
c0a62865
DK
2638 *pstatus = CFVS_NO_OUTPUT_SECTION;
2639 return 0;
ead1e424 2640 }
55a93433 2641
eff45813
CC
2642 if (secoff64 == -1ULL)
2643 {
2644 // The section needs special handling (e.g., a merge section).
ef15dade 2645
2ea97941 2646 value = os->output_address(relobj, shndx, sym->value());
eff45813
CC
2647 }
2648 else
2649 {
2650 Value_type secoff =
2651 convert_types<Value_type, uint64_t>(secoff64);
2652 if (sym->type() == elfcpp::STT_TLS)
2ea97941 2653 value = sym->value() + os->tls_offset() + secoff;
eff45813 2654 else
2ea97941 2655 value = sym->value() + os->address() + secoff;
eff45813 2656 }
ead1e424 2657 }
55a93433
ILT
2658 }
2659 break;
2660
2661 case Symbol::IN_OUTPUT_DATA:
2662 {
2663 Output_data* od = sym->output_data();
2ea97941 2664 value = sym->value();
155a0dd7 2665 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2666 value += od->address();
155a0dd7
ILT
2667 else
2668 {
2669 Output_section* os = od->output_section();
2670 gold_assert(os != NULL);
2ea97941 2671 value += os->tls_offset() + (od->address() - os->address());
155a0dd7 2672 }
55a93433 2673 if (sym->offset_is_from_end())
2ea97941 2674 value += od->data_size();
55a93433
ILT
2675 }
2676 break;
2677
2678 case Symbol::IN_OUTPUT_SEGMENT:
2679 {
2680 Output_segment* os = sym->output_segment();
2ea97941 2681 value = sym->value();
edfbb029 2682 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2683 value += os->vaddr();
55a93433
ILT
2684 switch (sym->offset_base())
2685 {
2686 case Symbol::SEGMENT_START:
2687 break;
2688 case Symbol::SEGMENT_END:
2ea97941 2689 value += os->memsz();
55a93433
ILT
2690 break;
2691 case Symbol::SEGMENT_BSS:
2ea97941 2692 value += os->filesz();
55a93433
ILT
2693 break;
2694 default:
2695 gold_unreachable();
2696 }
2697 }
2698 break;
ead1e424 2699
f3e9c5c5 2700 case Symbol::IS_CONSTANT:
2ea97941 2701 value = sym->value();
55a93433 2702 break;
ead1e424 2703
f3e9c5c5 2704 case Symbol::IS_UNDEFINED:
2ea97941 2705 value = 0;
f3e9c5c5
ILT
2706 break;
2707
55a93433
ILT
2708 default:
2709 gold_unreachable();
2710 }
ead1e424 2711
c0a62865 2712 *pstatus = CFVS_OK;
2ea97941 2713 return value;
c0a62865
DK
2714}
2715
2716// Finalize the symbol SYM. This returns true if the symbol should be
2717// added to the symbol table, false otherwise.
2718
2719template<int size>
2720bool
2721Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
2722{
2723 typedef typename Sized_symbol<size>::Value_type Value_type;
2724
2725 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
2726
2727 // The default version of a symbol may appear twice in the symbol
2728 // table. We only need to finalize it once.
2729 if (sym->has_symtab_index())
2730 return false;
2731
2732 if (!sym->in_reg())
2733 {
2734 gold_assert(!sym->has_symtab_index());
2735 sym->set_symtab_index(-1U);
2736 gold_assert(sym->dynsym_index() == -1U);
2737 return false;
2738 }
2739
badc8139
RÁE
2740 // If the symbol is only present on plugin files, the plugin decided we
2741 // don't need it.
2742 if (!sym->in_real_elf())
2743 {
2744 gold_assert(!sym->has_symtab_index());
2745 sym->set_symtab_index(-1U);
2746 return false;
2747 }
2748
c0a62865
DK
2749 // Compute final symbol value.
2750 Compute_final_value_status status;
2ea97941 2751 Value_type value = this->compute_final_value(sym, &status);
c0a62865
DK
2752
2753 switch (status)
2754 {
2755 case CFVS_OK:
2756 break;
2757 case CFVS_UNSUPPORTED_SYMBOL_SECTION:
2758 {
2759 bool is_ordinary;
2ea97941 2760 unsigned int shndx = sym->shndx(&is_ordinary);
c0a62865 2761 gold_error(_("%s: unsupported symbol section 0x%x"),
2ea97941 2762 sym->demangled_name().c_str(), shndx);
c0a62865
DK
2763 }
2764 break;
2765 case CFVS_NO_OUTPUT_SECTION:
2766 sym->set_symtab_index(-1U);
2767 return false;
2768 default:
2769 gold_unreachable();
2770 }
2771
2ea97941 2772 sym->set_value(value);
9e2dcb77 2773
8c604651
CS
2774 if (parameters->options().strip_all()
2775 || !parameters->options().should_retain_symbol(sym->name()))
55a93433
ILT
2776 {
2777 sym->set_symtab_index(-1U);
2778 return false;
54dc6425 2779 }
75f65a3e 2780
55a93433 2781 return true;
54dc6425
ILT
2782}
2783
61ba1cf9
ILT
2784// Write out the global symbols.
2785
2786void
fd9d194f 2787Symbol_table::write_globals(const Stringpool* sympool,
d491d34e
ILT
2788 const Stringpool* dynpool,
2789 Output_symtab_xindex* symtab_xindex,
2790 Output_symtab_xindex* dynsym_xindex,
2791 Output_file* of) const
61ba1cf9 2792{
8851ecca 2793 switch (parameters->size_and_endianness())
61ba1cf9 2794 {
9025d29d 2795#ifdef HAVE_TARGET_32_LITTLE
8851ecca 2796 case Parameters::TARGET_32_LITTLE:
fd9d194f 2797 this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex,
d491d34e 2798 dynsym_xindex, of);
8851ecca 2799 break;
9025d29d 2800#endif
8851ecca
ILT
2801#ifdef HAVE_TARGET_32_BIG
2802 case Parameters::TARGET_32_BIG:
fd9d194f 2803 this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex,
d491d34e 2804 dynsym_xindex, of);
8851ecca 2805 break;
9025d29d 2806#endif
9025d29d 2807#ifdef HAVE_TARGET_64_LITTLE
8851ecca 2808 case Parameters::TARGET_64_LITTLE:
fd9d194f 2809 this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex,
d491d34e 2810 dynsym_xindex, of);
8851ecca 2811 break;
9025d29d 2812#endif
8851ecca
ILT
2813#ifdef HAVE_TARGET_64_BIG
2814 case Parameters::TARGET_64_BIG:
fd9d194f 2815 this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex,
d491d34e 2816 dynsym_xindex, of);
8851ecca
ILT
2817 break;
2818#endif
2819 default:
2820 gold_unreachable();
61ba1cf9 2821 }
61ba1cf9
ILT
2822}
2823
2824// Write out the global symbols.
2825
2826template<int size, bool big_endian>
2827void
fd9d194f 2828Symbol_table::sized_write_globals(const Stringpool* sympool,
16649710 2829 const Stringpool* dynpool,
d491d34e
ILT
2830 Output_symtab_xindex* symtab_xindex,
2831 Output_symtab_xindex* dynsym_xindex,
61ba1cf9
ILT
2832 Output_file* of) const
2833{
8851ecca 2834 const Target& target = parameters->target();
9a2d6984 2835
61ba1cf9 2836 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
55a93433
ILT
2837
2838 const unsigned int output_count = this->output_count_;
2839 const section_size_type oview_size = output_count * sym_size;
2840 const unsigned int first_global_index = this->first_global_index_;
5fe2a0f5
ILT
2841 unsigned char* psyms;
2842 if (this->offset_ == 0 || output_count == 0)
2843 psyms = NULL;
2844 else
2845 psyms = of->get_output_view(this->offset_, oview_size);
16649710 2846
55a93433
ILT
2847 const unsigned int dynamic_count = this->dynamic_count_;
2848 const section_size_type dynamic_size = dynamic_count * sym_size;
2849 const unsigned int first_dynamic_global_index =
2850 this->first_dynamic_global_index_;
16649710 2851 unsigned char* dynamic_view;
5fe2a0f5 2852 if (this->dynamic_offset_ == 0 || dynamic_count == 0)
16649710
ILT
2853 dynamic_view = NULL;
2854 else
2855 dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
c06b7b0b 2856
61ba1cf9
ILT
2857 for (Symbol_table_type::const_iterator p = this->table_.begin();
2858 p != this->table_.end();
2859 ++p)
2860 {
2861 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
2862
9a2d6984 2863 // Possibly warn about unresolved symbols in shared libraries.
fd9d194f 2864 this->warn_about_undefined_dynobj_symbol(sym);
e2827e5f 2865
a3ad94ed 2866 unsigned int sym_index = sym->symtab_index();
16649710
ILT
2867 unsigned int dynsym_index;
2868 if (dynamic_view == NULL)
2869 dynsym_index = -1U;
2870 else
2871 dynsym_index = sym->dynsym_index();
2872
2873 if (sym_index == -1U && dynsym_index == -1U)
a3ad94ed
ILT
2874 {
2875 // This symbol is not included in the output file.
2876 continue;
2877 }
16649710 2878
2ea97941 2879 unsigned int shndx;
88dd47ac
ILT
2880 typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
2881 typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
ce279a62 2882 elfcpp::STB binding = sym->binding();
9634ed06
CC
2883
2884 // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL.
2885 if (binding == elfcpp::STB_GNU_UNIQUE
2886 && !parameters->options().gnu_unique())
2887 binding = elfcpp::STB_GLOBAL;
2888
ead1e424
ILT
2889 switch (sym->source())
2890 {
2891 case Symbol::FROM_OBJECT:
2892 {
d491d34e
ILT
2893 bool is_ordinary;
2894 unsigned int in_shndx = sym->shndx(&is_ordinary);
ead1e424 2895
d491d34e 2896 if (!is_ordinary
0dfbdef4 2897 && in_shndx != elfcpp::SHN_ABS
8a5e3e08 2898 && !Symbol::is_common_shndx(in_shndx))
ead1e424 2899 {
75f2446e 2900 gold_error(_("%s: unsupported symbol section 0x%x"),
a2b1aa12 2901 sym->demangled_name().c_str(), in_shndx);
2ea97941 2902 shndx = in_shndx;
f6ce93d6 2903 }
ead1e424
ILT
2904 else
2905 {
75f2446e
ILT
2906 Object* symobj = sym->object();
2907 if (symobj->is_dynamic())
2908 {
2909 if (sym->needs_dynsym_value())
8851ecca 2910 dynsym_value = target.dynsym_value(sym);
2ea97941 2911 shndx = elfcpp::SHN_UNDEF;
ce279a62
CC
2912 if (sym->is_undef_binding_weak())
2913 binding = elfcpp::STB_WEAK;
74f67560
DK
2914 else
2915 binding = elfcpp::STB_GLOBAL;
75f2446e 2916 }
89fc3421 2917 else if (symobj->pluginobj() != NULL)
2ea97941 2918 shndx = elfcpp::SHN_UNDEF;
75f2446e 2919 else if (in_shndx == elfcpp::SHN_UNDEF
d491d34e
ILT
2920 || (!is_ordinary
2921 && (in_shndx == elfcpp::SHN_ABS
8a5e3e08 2922 || Symbol::is_common_shndx(in_shndx))))
2ea97941 2923 shndx = in_shndx;
75f2446e
ILT
2924 else
2925 {
2926 Relobj* relobj = static_cast<Relobj*>(symobj);
ef9beddf 2927 Output_section* os = relobj->output_section(in_shndx);
ef15dade
ST
2928 if (this->is_section_folded(relobj, in_shndx))
2929 {
2930 // This global symbol must be written out even though
2931 // it is folded.
2932 // Get the os of the section it is folded onto.
2933 Section_id folded =
2934 this->icf_->get_folded_section(relobj, in_shndx);
2935 gold_assert(folded.first !=NULL);
2936 Relobj* folded_obj =
2937 reinterpret_cast<Relobj*>(folded.first);
2938 os = folded_obj->output_section(folded.second);
2939 gold_assert(os != NULL);
2940 }
75f2446e 2941 gold_assert(os != NULL);
2ea97941 2942 shndx = os->out_shndx();
88dd47ac 2943
2ea97941 2944 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e
ILT
2945 {
2946 if (sym_index != -1U)
2ea97941 2947 symtab_xindex->add(sym_index, shndx);
d491d34e 2948 if (dynsym_index != -1U)
2ea97941
ILT
2949 dynsym_xindex->add(dynsym_index, shndx);
2950 shndx = elfcpp::SHN_XINDEX;
d491d34e
ILT
2951 }
2952
88dd47ac
ILT
2953 // In object files symbol values are section
2954 // relative.
8851ecca 2955 if (parameters->options().relocatable())
88dd47ac 2956 sym_value -= os->address();
75f2446e 2957 }
ead1e424
ILT
2958 }
2959 }
2960 break;
2961
2962 case Symbol::IN_OUTPUT_DATA:
502e8a84
CC
2963 {
2964 Output_data* od = sym->output_data();
2965
2966 shndx = od->out_shndx();
2967 if (shndx >= elfcpp::SHN_LORESERVE)
2968 {
2969 if (sym_index != -1U)
2970 symtab_xindex->add(sym_index, shndx);
2971 if (dynsym_index != -1U)
2972 dynsym_xindex->add(dynsym_index, shndx);
2973 shndx = elfcpp::SHN_XINDEX;
2974 }
2975
2976 // In object files symbol values are section
2977 // relative.
2978 if (parameters->options().relocatable())
2979 sym_value -= od->address();
2980 }
ead1e424
ILT
2981 break;
2982
2983 case Symbol::IN_OUTPUT_SEGMENT:
2ea97941 2984 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
2985 break;
2986
f3e9c5c5 2987 case Symbol::IS_CONSTANT:
2ea97941 2988 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
2989 break;
2990
f3e9c5c5 2991 case Symbol::IS_UNDEFINED:
2ea97941 2992 shndx = elfcpp::SHN_UNDEF;
f3e9c5c5
ILT
2993 break;
2994
ead1e424 2995 default:
a3ad94ed 2996 gold_unreachable();
ead1e424 2997 }
61ba1cf9 2998
16649710
ILT
2999 if (sym_index != -1U)
3000 {
55a93433
ILT
3001 sym_index -= first_global_index;
3002 gold_assert(sym_index < output_count);
3003 unsigned char* ps = psyms + (sym_index * sym_size);
2ea97941 3004 this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
ce279a62 3005 binding, sympool, ps);
16649710 3006 }
61ba1cf9 3007
16649710
ILT
3008 if (dynsym_index != -1U)
3009 {
3010 dynsym_index -= first_dynamic_global_index;
3011 gold_assert(dynsym_index < dynamic_count);
3012 unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
2ea97941 3013 this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
ce279a62 3014 binding, dynpool, pd);
800d9823
CC
3015 // Allow a target to adjust dynamic symbol value.
3016 parameters->target().adjust_dyn_symbol(sym, pd);
16649710 3017 }
61ba1cf9
ILT
3018 }
3019
c06b7b0b 3020 of->write_output_view(this->offset_, oview_size, psyms);
16649710
ILT
3021 if (dynamic_view != NULL)
3022 of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
3023}
3024
3025// Write out the symbol SYM, in section SHNDX, to P. POOL is the
3026// strtab holding the name.
3027
3028template<int size, bool big_endian>
3029void
ab5c9e90
ILT
3030Symbol_table::sized_write_symbol(
3031 Sized_symbol<size>* sym,
2ea97941
ILT
3032 typename elfcpp::Elf_types<size>::Elf_Addr value,
3033 unsigned int shndx,
ce279a62 3034 elfcpp::STB binding,
ab5c9e90 3035 const Stringpool* pool,
7d1a9ebb 3036 unsigned char* p) const
16649710
ILT
3037{
3038 elfcpp::Sym_write<size, big_endian> osym(p);
6d1c4efb
ILT
3039 if (sym->version() == NULL || !parameters->options().relocatable())
3040 osym.put_st_name(pool->get_offset(sym->name()));
3041 else
3042 osym.put_st_name(pool->get_offset(sym->versioned_name()));
2ea97941 3043 osym.put_st_value(value);
58e54ac2 3044 // Use a symbol size of zero for undefined symbols from shared libraries.
2ea97941 3045 if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj())
58e54ac2
CD
3046 osym.put_st_size(0);
3047 else
3048 osym.put_st_size(sym->symsize());
53d7974c
L
3049 elfcpp::STT type = sym->type();
3050 // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
3051 if (type == elfcpp::STT_GNU_IFUNC
3052 && sym->is_from_dynobj())
3053 type = elfcpp::STT_FUNC;
55a93433
ILT
3054 // A version script may have overridden the default binding.
3055 if (sym->is_forced_local())
53d7974c 3056 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type));
55a93433 3057 else
ce279a62 3058 osym.put_st_info(elfcpp::elf_st_info(binding, type));
16649710 3059 osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
2ea97941 3060 osym.put_st_shndx(shndx);
61ba1cf9
ILT
3061}
3062
9a2d6984
ILT
3063// Check for unresolved symbols in shared libraries. This is
3064// controlled by the --allow-shlib-undefined option.
3065
3066// We only warn about libraries for which we have seen all the
3067// DT_NEEDED entries. We don't try to track down DT_NEEDED entries
3068// which were not seen in this link. If we didn't see a DT_NEEDED
3069// entry, we aren't going to be able to reliably report whether the
3070// symbol is undefined.
3071
fd9d194f
ILT
3072// We also don't warn about libraries found in a system library
3073// directory (e.g., /lib or /usr/lib); we assume that those libraries
3074// are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
3075// can have undefined references satisfied by ld-linux.so.
9a2d6984
ILT
3076
3077inline void
fd9d194f 3078Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const
9a2d6984 3079{
d491d34e 3080 bool dummy;
9a2d6984
ILT
3081 if (sym->source() == Symbol::FROM_OBJECT
3082 && sym->object()->is_dynamic()
d491d34e 3083 && sym->shndx(&dummy) == elfcpp::SHN_UNDEF
9a2d6984 3084 && sym->binding() != elfcpp::STB_WEAK
8851ecca
ILT
3085 && !parameters->options().allow_shlib_undefined()
3086 && !parameters->target().is_defined_by_abi(sym)
fd9d194f 3087 && !sym->object()->is_in_system_directory())
9a2d6984
ILT
3088 {
3089 // A very ugly cast.
3090 Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
3091 if (!dynobj->has_unknown_needed_entries())
f073bbf7 3092 gold_undefined_symbol(sym);
9a2d6984
ILT
3093 }
3094}
3095
a3ad94ed
ILT
3096// Write out a section symbol. Return the update offset.
3097
3098void
ca09d69a 3099Symbol_table::write_section_symbol(const Output_section* os,
d491d34e 3100 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3101 Output_file* of,
3102 off_t offset) const
3103{
8851ecca 3104 switch (parameters->size_and_endianness())
a3ad94ed 3105 {
9025d29d 3106#ifdef HAVE_TARGET_32_LITTLE
8851ecca 3107 case Parameters::TARGET_32_LITTLE:
d491d34e
ILT
3108 this->sized_write_section_symbol<32, false>(os, symtab_xindex, of,
3109 offset);
8851ecca 3110 break;
9025d29d 3111#endif
8851ecca
ILT
3112#ifdef HAVE_TARGET_32_BIG
3113 case Parameters::TARGET_32_BIG:
d491d34e
ILT
3114 this->sized_write_section_symbol<32, true>(os, symtab_xindex, of,
3115 offset);
8851ecca 3116 break;
9025d29d 3117#endif
9025d29d 3118#ifdef HAVE_TARGET_64_LITTLE
8851ecca 3119 case Parameters::TARGET_64_LITTLE:
d491d34e
ILT
3120 this->sized_write_section_symbol<64, false>(os, symtab_xindex, of,
3121 offset);
8851ecca 3122 break;
9025d29d 3123#endif
8851ecca
ILT
3124#ifdef HAVE_TARGET_64_BIG
3125 case Parameters::TARGET_64_BIG:
d491d34e
ILT
3126 this->sized_write_section_symbol<64, true>(os, symtab_xindex, of,
3127 offset);
8851ecca
ILT
3128 break;
3129#endif
3130 default:
3131 gold_unreachable();
a3ad94ed 3132 }
a3ad94ed
ILT
3133}
3134
3135// Write out a section symbol, specialized for size and endianness.
3136
3137template<int size, bool big_endian>
3138void
3139Symbol_table::sized_write_section_symbol(const Output_section* os,
d491d34e 3140 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3141 Output_file* of,
3142 off_t offset) const
3143{
3144 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
3145
3146 unsigned char* pov = of->get_output_view(offset, sym_size);
3147
3148 elfcpp::Sym_write<size, big_endian> osym(pov);
3149 osym.put_st_name(0);
b4ecf66b
ILT
3150 if (parameters->options().relocatable())
3151 osym.put_st_value(0);
3152 else
3153 osym.put_st_value(os->address());
a3ad94ed
ILT
3154 osym.put_st_size(0);
3155 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
3156 elfcpp::STT_SECTION));
3157 osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
d491d34e 3158
2ea97941
ILT
3159 unsigned int shndx = os->out_shndx();
3160 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e 3161 {
2ea97941
ILT
3162 symtab_xindex->add(os->symtab_index(), shndx);
3163 shndx = elfcpp::SHN_XINDEX;
d491d34e 3164 }
2ea97941 3165 osym.put_st_shndx(shndx);
a3ad94ed
ILT
3166
3167 of->write_output_view(offset, sym_size, pov);
3168}
3169
abaa3995
ILT
3170// Print statistical information to stderr. This is used for --stats.
3171
3172void
3173Symbol_table::print_stats() const
3174{
3175#if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
3176 fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"),
3177 program_name, this->table_.size(), this->table_.bucket_count());
3178#else
3179 fprintf(stderr, _("%s: symbol table entries: %zu\n"),
3180 program_name, this->table_.size());
3181#endif
ad8f37d1 3182 this->namepool_.print_stats("symbol table stringpool");
abaa3995
ILT
3183}
3184
ff541f30
ILT
3185// We check for ODR violations by looking for symbols with the same
3186// name for which the debugging information reports that they were
71ff8986 3187// defined in disjoint source locations. When comparing the source
55382fb7
ILT
3188// location, we consider instances with the same base filename to be
3189// the same. This is because different object files/shared libraries
3190// can include the same header file using different paths, and
3191// different optimization settings can make the line number appear to
3192// be a couple lines off, and we don't want to report an ODR violation
3193// in those cases.
ff541f30
ILT
3194
3195// This struct is used to compare line information, as returned by
7bf1f802 3196// Dwarf_line_info::one_addr2line. It implements a < comparison
71ff8986 3197// operator used with std::sort.
ff541f30
ILT
3198
3199struct Odr_violation_compare
3200{
3201 bool
3202 operator()(const std::string& s1, const std::string& s2) const
3203 {
55382fb7 3204 // Inputs should be of the form "dirname/filename:linenum" where
71ff8986 3205 // "dirname/" is optional. We want to compare just the filename:linenum.
55382fb7 3206
71ff8986 3207 // Find the last '/' in each string.
55382fb7
ILT
3208 std::string::size_type s1begin = s1.rfind('/');
3209 std::string::size_type s2begin = s2.rfind('/');
55382fb7
ILT
3210 // If there was no '/' in a string, start at the beginning.
3211 if (s1begin == std::string::npos)
3212 s1begin = 0;
3213 if (s2begin == std::string::npos)
3214 s2begin = 0;
71ff8986
ILT
3215 return s1.compare(s1begin, std::string::npos,
3216 s2, s2begin, std::string::npos) < 0;
ff541f30
ILT
3217 }
3218};
3219
71ff8986
ILT
3220// Returns all of the lines attached to LOC, not just the one the
3221// instruction actually came from.
3222std::vector<std::string>
3223Symbol_table::linenos_from_loc(const Task* task,
3224 const Symbol_location& loc)
3225{
3226 // We need to lock the object in order to read it. This
3227 // means that we have to run in a singleton Task. If we
3228 // want to run this in a general Task for better
3229 // performance, we will need one Task for object, plus
3230 // appropriate locking to ensure that we don't conflict with
3231 // other uses of the object. Also note, one_addr2line is not
3232 // currently thread-safe.
3233 Task_lock_obj<Object> tl(task, loc.object);
3234
3235 std::vector<std::string> result;
dc3714f3
AM
3236 Symbol_location code_loc = loc;
3237 parameters->target().function_location(&code_loc);
71ff8986
ILT
3238 // 16 is the size of the object-cache that one_addr2line should use.
3239 std::string canonical_result = Dwarf_line_info::one_addr2line(
dc3714f3 3240 code_loc.object, code_loc.shndx, code_loc.offset, 16, &result);
71ff8986
ILT
3241 if (!canonical_result.empty())
3242 result.push_back(canonical_result);
3243 return result;
3244}
3245
3246// OutputIterator that records if it was ever assigned to. This
3247// allows it to be used with std::set_intersection() to check for
3248// intersection rather than computing the intersection.
3249struct Check_intersection
3250{
3251 Check_intersection()
3252 : value_(false)
3253 {}
3254
3255 bool had_intersection() const
3256 { return this->value_; }
3257
3258 Check_intersection& operator++()
3259 { return *this; }
3260
3261 Check_intersection& operator*()
3262 { return *this; }
3263
3264 template<typename T>
3265 Check_intersection& operator=(const T&)
3266 {
3267 this->value_ = true;
3268 return *this;
3269 }
3270
3271 private:
3272 bool value_;
3273};
3274
70e654ba 3275// Check candidate_odr_violations_ to find symbols with the same name
71ff8986
ILT
3276// but apparently different definitions (different source-file/line-no
3277// for each line assigned to the first instruction).
70e654ba
ILT
3278
3279void
17a1d0a9
ILT
3280Symbol_table::detect_odr_violations(const Task* task,
3281 const char* output_file_name) const
70e654ba
ILT
3282{
3283 for (Odr_map::const_iterator it = candidate_odr_violations_.begin();
3284 it != candidate_odr_violations_.end();
3285 ++it)
3286 {
71ff8986
ILT
3287 const char* const symbol_name = it->first;
3288
3289 std::string first_object_name;
3290 std::vector<std::string> first_object_linenos;
3291
3292 Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3293 locs = it->second.begin();
3294 const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3295 locs_end = it->second.end();
3296 for (; locs != locs_end && first_object_linenos.empty(); ++locs)
70e654ba 3297 {
71ff8986
ILT
3298 // Save the line numbers from the first definition to
3299 // compare to the other definitions. Ideally, we'd compare
3300 // every definition to every other, but we don't want to
3301 // take O(N^2) time to do this. This shortcut may cause
3302 // false negatives that appear or disappear depending on the
3303 // link order, but it won't cause false positives.
3304 first_object_name = locs->object->name();
3305 first_object_linenos = this->linenos_from_loc(task, *locs);
70e654ba
ILT
3306 }
3307
71ff8986
ILT
3308 // Sort by Odr_violation_compare to make std::set_intersection work.
3309 std::sort(first_object_linenos.begin(), first_object_linenos.end(),
3310 Odr_violation_compare());
3311
3312 for (; locs != locs_end; ++locs)
70e654ba 3313 {
71ff8986
ILT
3314 std::vector<std::string> linenos =
3315 this->linenos_from_loc(task, *locs);
3316 // linenos will be empty if we couldn't parse the debug info.
3317 if (linenos.empty())
3318 continue;
3319 // Sort by Odr_violation_compare to make std::set_intersection work.
3320 std::sort(linenos.begin(), linenos.end(), Odr_violation_compare());
3321
3322 Check_intersection intersection_result =
3323 std::set_intersection(first_object_linenos.begin(),
3324 first_object_linenos.end(),
3325 linenos.begin(),
3326 linenos.end(),
3327 Check_intersection(),
3328 Odr_violation_compare());
3329 if (!intersection_result.had_intersection())
3330 {
3331 gold_warning(_("while linking %s: symbol '%s' defined in "
3332 "multiple places (possible ODR violation):"),
3333 output_file_name, demangle(symbol_name).c_str());
3334 // This only prints one location from each definition,
3335 // which may not be the location we expect to intersect
3336 // with another definition. We could print the whole
3337 // set of locations, but that seems too verbose.
3338 gold_assert(!first_object_linenos.empty());
3339 gold_assert(!linenos.empty());
3340 fprintf(stderr, _(" %s from %s\n"),
3341 first_object_linenos[0].c_str(),
3342 first_object_name.c_str());
3343 fprintf(stderr, _(" %s from %s\n"),
3344 linenos[0].c_str(),
3345 locs->object->name().c_str());
3346 // Only print one broken pair, to avoid needing to
3347 // compare against a list of the disjoint definition
3348 // locations we've found so far. (If we kept comparing
3349 // against just the first one, we'd get a lot of
3350 // redundant complaints about the second definition
3351 // location.)
3352 break;
3353 }
70e654ba
ILT
3354 }
3355 }
e4e5049b
CS
3356 // We only call one_addr2line() in this function, so we can clear its cache.
3357 Dwarf_line_info::clear_addr2line_cache();
70e654ba
ILT
3358}
3359
f6ce93d6
ILT
3360// Warnings functions.
3361
3362// Add a new warning.
3363
3364void
2ea97941 3365Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
cb295612 3366 const std::string& warning)
f6ce93d6 3367{
2ea97941
ILT
3368 name = symtab->canonicalize_name(name);
3369 this->warnings_[name].set(obj, warning);
f6ce93d6
ILT
3370}
3371
3372// Look through the warnings and mark the symbols for which we should
3373// warn. This is called during Layout::finalize when we know the
3374// sources for all the symbols.
3375
3376void
cb295612 3377Warnings::note_warnings(Symbol_table* symtab)
f6ce93d6
ILT
3378{
3379 for (Warning_table::iterator p = this->warnings_.begin();
3380 p != this->warnings_.end();
3381 ++p)
3382 {
3383 Symbol* sym = symtab->lookup(p->first, NULL);
3384 if (sym != NULL
3385 && sym->source() == Symbol::FROM_OBJECT
3386 && sym->object() == p->second.object)
cb295612 3387 sym->set_has_warning();
f6ce93d6
ILT
3388 }
3389}
3390
3391// Issue a warning. This is called when we see a relocation against a
3392// symbol for which has a warning.
3393
75f2446e 3394template<int size, bool big_endian>
f6ce93d6 3395void
75f2446e
ILT
3396Warnings::issue_warning(const Symbol* sym,
3397 const Relocate_info<size, big_endian>* relinfo,
3398 size_t relnum, off_t reloffset) const
f6ce93d6 3399{
a3ad94ed 3400 gold_assert(sym->has_warning());
9d3b0698
ILT
3401
3402 // We don't want to issue a warning for a relocation against the
3403 // symbol in the same object file in which the symbol is defined.
3404 if (sym->object() == relinfo->object)
3405 return;
3406
f6ce93d6 3407 Warning_table::const_iterator p = this->warnings_.find(sym->name());
a3ad94ed 3408 gold_assert(p != this->warnings_.end());
75f2446e
ILT
3409 gold_warning_at_location(relinfo, relnum, reloffset,
3410 "%s", p->second.text.c_str());
f6ce93d6
ILT
3411}
3412
14bfc3f5
ILT
3413// Instantiate the templates we need. We could use the configure
3414// script to restrict this to only the ones needed for implemented
3415// targets.
3416
c7912668
ILT
3417#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3418template
3419void
3420Sized_symbol<32>::allocate_common(Output_data*, Value_type);
3421#endif
3422
3423#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3424template
3425void
3426Sized_symbol<64>::allocate_common(Output_data*, Value_type);
3427#endif
3428
193a53d9 3429#ifdef HAVE_TARGET_32_LITTLE
14bfc3f5
ILT
3430template
3431void
193a53d9 3432Symbol_table::add_from_relobj<32, false>(
6fa2a40b 3433 Sized_relobj_file<32, false>* relobj,
f6ce93d6 3434 const unsigned char* syms,
14bfc3f5 3435 size_t count,
d491d34e 3436 size_t symndx_offset,
14bfc3f5
ILT
3437 const char* sym_names,
3438 size_t sym_name_size,
6fa2a40b 3439 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3440 size_t* defined);
193a53d9 3441#endif
14bfc3f5 3442
193a53d9 3443#ifdef HAVE_TARGET_32_BIG
14bfc3f5
ILT
3444template
3445void
193a53d9 3446Symbol_table::add_from_relobj<32, true>(
6fa2a40b 3447 Sized_relobj_file<32, true>* relobj,
f6ce93d6 3448 const unsigned char* syms,
14bfc3f5 3449 size_t count,
d491d34e 3450 size_t symndx_offset,
14bfc3f5
ILT
3451 const char* sym_names,
3452 size_t sym_name_size,
6fa2a40b 3453 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3454 size_t* defined);
193a53d9 3455#endif
14bfc3f5 3456
193a53d9 3457#ifdef HAVE_TARGET_64_LITTLE
14bfc3f5
ILT
3458template
3459void
193a53d9 3460Symbol_table::add_from_relobj<64, false>(
6fa2a40b 3461 Sized_relobj_file<64, false>* relobj,
f6ce93d6 3462 const unsigned char* syms,
14bfc3f5 3463 size_t count,
d491d34e 3464 size_t symndx_offset,
14bfc3f5
ILT
3465 const char* sym_names,
3466 size_t sym_name_size,
6fa2a40b 3467 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3468 size_t* defined);
193a53d9 3469#endif
14bfc3f5 3470
193a53d9 3471#ifdef HAVE_TARGET_64_BIG
14bfc3f5
ILT
3472template
3473void
193a53d9 3474Symbol_table::add_from_relobj<64, true>(
6fa2a40b 3475 Sized_relobj_file<64, true>* relobj,
f6ce93d6 3476 const unsigned char* syms,
14bfc3f5 3477 size_t count,
d491d34e 3478 size_t symndx_offset,
14bfc3f5
ILT
3479 const char* sym_names,
3480 size_t sym_name_size,
6fa2a40b 3481 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3482 size_t* defined);
193a53d9 3483#endif
14bfc3f5 3484
89fc3421
CC
3485#ifdef HAVE_TARGET_32_LITTLE
3486template
3487Symbol*
3488Symbol_table::add_from_pluginobj<32, false>(
3489 Sized_pluginobj<32, false>* obj,
3490 const char* name,
3491 const char* ver,
3492 elfcpp::Sym<32, false>* sym);
3493#endif
3494
3495#ifdef HAVE_TARGET_32_BIG
3496template
3497Symbol*
3498Symbol_table::add_from_pluginobj<32, true>(
3499 Sized_pluginobj<32, true>* obj,
3500 const char* name,
3501 const char* ver,
3502 elfcpp::Sym<32, true>* sym);
3503#endif
3504
3505#ifdef HAVE_TARGET_64_LITTLE
3506template
3507Symbol*
3508Symbol_table::add_from_pluginobj<64, false>(
3509 Sized_pluginobj<64, false>* obj,
3510 const char* name,
3511 const char* ver,
3512 elfcpp::Sym<64, false>* sym);
3513#endif
3514
3515#ifdef HAVE_TARGET_64_BIG
3516template
3517Symbol*
3518Symbol_table::add_from_pluginobj<64, true>(
3519 Sized_pluginobj<64, true>* obj,
3520 const char* name,
3521 const char* ver,
3522 elfcpp::Sym<64, true>* sym);
3523#endif
3524
193a53d9 3525#ifdef HAVE_TARGET_32_LITTLE
dbe717ef
ILT
3526template
3527void
193a53d9
ILT
3528Symbol_table::add_from_dynobj<32, false>(
3529 Sized_dynobj<32, false>* dynobj,
dbe717ef
ILT
3530 const unsigned char* syms,
3531 size_t count,
3532 const char* sym_names,
3533 size_t sym_name_size,
3534 const unsigned char* versym,
3535 size_t versym_size,
92de84a6 3536 const std::vector<const char*>* version_map,
6fa2a40b 3537 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3538 size_t* defined);
193a53d9 3539#endif
dbe717ef 3540
193a53d9 3541#ifdef HAVE_TARGET_32_BIG
dbe717ef
ILT
3542template
3543void
193a53d9
ILT
3544Symbol_table::add_from_dynobj<32, true>(
3545 Sized_dynobj<32, true>* dynobj,
dbe717ef
ILT
3546 const unsigned char* syms,
3547 size_t count,
3548 const char* sym_names,
3549 size_t sym_name_size,
3550 const unsigned char* versym,
3551 size_t versym_size,
92de84a6 3552 const std::vector<const char*>* version_map,
6fa2a40b 3553 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3554 size_t* defined);
193a53d9 3555#endif
dbe717ef 3556
193a53d9 3557#ifdef HAVE_TARGET_64_LITTLE
dbe717ef
ILT
3558template
3559void
193a53d9
ILT
3560Symbol_table::add_from_dynobj<64, false>(
3561 Sized_dynobj<64, false>* dynobj,
dbe717ef
ILT
3562 const unsigned char* syms,
3563 size_t count,
3564 const char* sym_names,
3565 size_t sym_name_size,
3566 const unsigned char* versym,
3567 size_t versym_size,
92de84a6 3568 const std::vector<const char*>* version_map,
6fa2a40b 3569 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3570 size_t* defined);
193a53d9 3571#endif
dbe717ef 3572
193a53d9 3573#ifdef HAVE_TARGET_64_BIG
dbe717ef
ILT
3574template
3575void
193a53d9
ILT
3576Symbol_table::add_from_dynobj<64, true>(
3577 Sized_dynobj<64, true>* dynobj,
dbe717ef
ILT
3578 const unsigned char* syms,
3579 size_t count,
3580 const char* sym_names,
3581 size_t sym_name_size,
3582 const unsigned char* versym,
3583 size_t versym_size,
92de84a6 3584 const std::vector<const char*>* version_map,
6fa2a40b 3585 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3586 size_t* defined);
193a53d9 3587#endif
dbe717ef 3588
cdc29364
CC
3589#ifdef HAVE_TARGET_32_LITTLE
3590template
26d3c67d 3591Sized_symbol<32>*
cdc29364
CC
3592Symbol_table::add_from_incrobj(
3593 Object* obj,
3594 const char* name,
3595 const char* ver,
3596 elfcpp::Sym<32, false>* sym);
3597#endif
3598
3599#ifdef HAVE_TARGET_32_BIG
3600template
26d3c67d 3601Sized_symbol<32>*
cdc29364
CC
3602Symbol_table::add_from_incrobj(
3603 Object* obj,
3604 const char* name,
3605 const char* ver,
3606 elfcpp::Sym<32, true>* sym);
3607#endif
3608
3609#ifdef HAVE_TARGET_64_LITTLE
3610template
26d3c67d 3611Sized_symbol<64>*
cdc29364
CC
3612Symbol_table::add_from_incrobj(
3613 Object* obj,
3614 const char* name,
3615 const char* ver,
3616 elfcpp::Sym<64, false>* sym);
3617#endif
3618
3619#ifdef HAVE_TARGET_64_BIG
3620template
26d3c67d 3621Sized_symbol<64>*
cdc29364
CC
3622Symbol_table::add_from_incrobj(
3623 Object* obj,
3624 const char* name,
3625 const char* ver,
3626 elfcpp::Sym<64, true>* sym);
3627#endif
3628
46fe1623
ILT
3629#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3630template
3631void
fe8718a4 3632Symbol_table::define_with_copy_reloc<32>(
fe8718a4
ILT
3633 Sized_symbol<32>* sym,
3634 Output_data* posd,
2ea97941 3635 elfcpp::Elf_types<32>::Elf_Addr value);
46fe1623
ILT
3636#endif
3637
3638#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3639template
3640void
fe8718a4 3641Symbol_table::define_with_copy_reloc<64>(
fe8718a4
ILT
3642 Sized_symbol<64>* sym,
3643 Output_data* posd,
2ea97941 3644 elfcpp::Elf_types<64>::Elf_Addr value);
46fe1623
ILT
3645#endif
3646
beacaa96
CC
3647#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3648template
3649void
3650Sized_symbol<32>::init_output_data(const char* name, const char* version,
3651 Output_data* od, Value_type value,
3652 Size_type symsize, elfcpp::STT type,
3653 elfcpp::STB binding,
3654 elfcpp::STV visibility,
3655 unsigned char nonvis,
3656 bool offset_is_from_end,
3657 bool is_predefined);
3658#endif
3659
3660#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3661template
3662void
3663Sized_symbol<64>::init_output_data(const char* name, const char* version,
3664 Output_data* od, Value_type value,
3665 Size_type symsize, elfcpp::STT type,
3666 elfcpp::STB binding,
3667 elfcpp::STV visibility,
3668 unsigned char nonvis,
3669 bool offset_is_from_end,
3670 bool is_predefined);
3671#endif
3672
75f2446e
ILT
3673#ifdef HAVE_TARGET_32_LITTLE
3674template
3675void
3676Warnings::issue_warning<32, false>(const Symbol* sym,
3677 const Relocate_info<32, false>* relinfo,
3678 size_t relnum, off_t reloffset) const;
3679#endif
3680
3681#ifdef HAVE_TARGET_32_BIG
3682template
3683void
3684Warnings::issue_warning<32, true>(const Symbol* sym,
3685 const Relocate_info<32, true>* relinfo,
3686 size_t relnum, off_t reloffset) const;
3687#endif
3688
3689#ifdef HAVE_TARGET_64_LITTLE
3690template
3691void
3692Warnings::issue_warning<64, false>(const Symbol* sym,
3693 const Relocate_info<64, false>* relinfo,
3694 size_t relnum, off_t reloffset) const;
3695#endif
3696
3697#ifdef HAVE_TARGET_64_BIG
3698template
3699void
3700Warnings::issue_warning<64, true>(const Symbol* sym,
3701 const Relocate_info<64, true>* relinfo,
3702 size_t relnum, off_t reloffset) const;
3703#endif
3704
14bfc3f5 3705} // End namespace gold.