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[thirdparty/binutils-gdb.git] / gold / symtab.cc
CommitLineData
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1// symtab.cc -- the gold symbol table
2
0f3b89d8 3// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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4// Written by Ian Lance Taylor <iant@google.com>.
5
6// This file is part of gold.
7
8// This program is free software; you can redistribute it and/or modify
9// it under the terms of the GNU General Public License as published by
10// the Free Software Foundation; either version 3 of the License, or
11// (at your option) any later version.
12
13// This program is distributed in the hope that it will be useful,
14// but WITHOUT ANY WARRANTY; without even the implied warranty of
15// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16// GNU General Public License for more details.
17
18// You should have received a copy of the GNU General Public License
19// along with this program; if not, write to the Free Software
20// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21// MA 02110-1301, USA.
22
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23#include "gold.h"
24
04bf7072 25#include <cstring>
14bfc3f5 26#include <stdint.h>
04bf7072 27#include <algorithm>
70e654ba 28#include <set>
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29#include <string>
30#include <utility>
a2b1aa12 31#include "demangle.h"
14bfc3f5 32
6d03d481 33#include "gc.h"
14bfc3f5 34#include "object.h"
70e654ba 35#include "dwarf_reader.h"
dbe717ef 36#include "dynobj.h"
75f65a3e 37#include "output.h"
61ba1cf9 38#include "target.h"
645f8123 39#include "workqueue.h"
14bfc3f5 40#include "symtab.h"
88a4108b 41#include "script.h"
89fc3421 42#include "plugin.h"
cdc29364 43#include "incremental.h"
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44
45namespace gold
46{
47
48// Class Symbol.
49
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50// Initialize fields in Symbol. This initializes everything except u_
51// and source_.
14bfc3f5 52
14bfc3f5 53void
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54Symbol::init_fields(const char* name, const char* version,
55 elfcpp::STT type, elfcpp::STB binding,
56 elfcpp::STV visibility, unsigned char nonvis)
14bfc3f5 57{
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58 this->name_ = name;
59 this->version_ = version;
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60 this->symtab_index_ = 0;
61 this->dynsym_index_ = 0;
0a65a3a7 62 this->got_offsets_.init();
880cd20d 63 this->plt_offset_ = -1U;
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64 this->type_ = type;
65 this->binding_ = binding;
66 this->visibility_ = visibility;
67 this->nonvis_ = nonvis;
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68 this->is_def_ = false;
69 this->is_forwarder_ = false;
aeddab66 70 this->has_alias_ = false;
c06b7b0b 71 this->needs_dynsym_entry_ = false;
008db82e 72 this->in_reg_ = false;
ead1e424 73 this->in_dyn_ = false;
f6ce93d6 74 this->has_warning_ = false;
46fe1623 75 this->is_copied_from_dynobj_ = false;
55a93433 76 this->is_forced_local_ = false;
d491d34e 77 this->is_ordinary_shndx_ = false;
89fc3421 78 this->in_real_elf_ = false;
880cd20d 79 this->is_defined_in_discarded_section_ = false;
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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());
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109}
110
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111// Initialize the fields in the base class Symbol for SYM in OBJECT.
112
113template<int size, bool big_endian>
114void
2ea97941 115Symbol::init_base_object(const char* name, const char* version, Object* object,
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116 const elfcpp::Sym<size, big_endian>& sym,
117 unsigned int st_shndx, bool is_ordinary)
ead1e424 118{
2ea97941 119 this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(),
ead1e424 120 sym.get_st_visibility(), sym.get_st_nonvis());
2ea97941 121 this->u_.from_object.object = object;
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122 this->u_.from_object.shndx = st_shndx;
123 this->is_ordinary_shndx_ = is_ordinary;
ead1e424 124 this->source_ = FROM_OBJECT;
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125 this->in_reg_ = !object->is_dynamic();
126 this->in_dyn_ = object->is_dynamic();
127 this->in_real_elf_ = object->pluginobj() == NULL;
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128}
129
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130// Initialize the fields in the base class Symbol for a symbol defined
131// in an Output_data.
132
133void
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134Symbol::init_base_output_data(const char* name, const char* version,
135 Output_data* od, elfcpp::STT type,
136 elfcpp::STB binding, elfcpp::STV visibility,
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137 unsigned char nonvis, bool offset_is_from_end,
138 bool is_predefined)
ead1e424 139{
2ea97941 140 this->init_fields(name, version, type, binding, visibility, nonvis);
ead1e424 141 this->u_.in_output_data.output_data = od;
2ea97941 142 this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
ead1e424 143 this->source_ = IN_OUTPUT_DATA;
008db82e 144 this->in_reg_ = true;
89fc3421 145 this->in_real_elf_ = true;
5146f448 146 this->is_predefined_ = is_predefined;
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147}
148
149// Initialize the fields in the base class Symbol for a symbol defined
150// in an Output_segment.
151
152void
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153Symbol::init_base_output_segment(const char* name, const char* version,
154 Output_segment* os, elfcpp::STT type,
155 elfcpp::STB binding, elfcpp::STV visibility,
156 unsigned char nonvis,
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157 Segment_offset_base offset_base,
158 bool is_predefined)
ead1e424 159{
2ea97941 160 this->init_fields(name, version, type, binding, visibility, nonvis);
ead1e424 161 this->u_.in_output_segment.output_segment = os;
2ea97941 162 this->u_.in_output_segment.offset_base = offset_base;
ead1e424 163 this->source_ = IN_OUTPUT_SEGMENT;
008db82e 164 this->in_reg_ = true;
89fc3421 165 this->in_real_elf_ = true;
5146f448 166 this->is_predefined_ = is_predefined;
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167}
168
169// Initialize the fields in the base class Symbol for a symbol defined
170// as a constant.
171
172void
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173Symbol::init_base_constant(const char* name, const char* version,
174 elfcpp::STT type, elfcpp::STB binding,
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175 elfcpp::STV visibility, unsigned char nonvis,
176 bool is_predefined)
f3e9c5c5 177{
2ea97941 178 this->init_fields(name, version, type, binding, visibility, nonvis);
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179 this->source_ = IS_CONSTANT;
180 this->in_reg_ = true;
89fc3421 181 this->in_real_elf_ = true;
5146f448 182 this->is_predefined_ = is_predefined;
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183}
184
185// Initialize the fields in the base class Symbol for an undefined
186// symbol.
187
188void
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189Symbol::init_base_undefined(const char* name, const char* version,
190 elfcpp::STT type, elfcpp::STB binding,
191 elfcpp::STV visibility, unsigned char nonvis)
ead1e424 192{
2ea97941 193 this->init_fields(name, version, type, binding, visibility, nonvis);
d7ab2a47 194 this->dynsym_index_ = -1U;
f3e9c5c5 195 this->source_ = IS_UNDEFINED;
008db82e 196 this->in_reg_ = true;
89fc3421 197 this->in_real_elf_ = true;
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198}
199
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200// Allocate a common symbol in the base.
201
202void
203Symbol::allocate_base_common(Output_data* od)
204{
205 gold_assert(this->is_common());
206 this->source_ = IN_OUTPUT_DATA;
207 this->u_.in_output_data.output_data = od;
208 this->u_.in_output_data.offset_is_from_end = false;
209}
210
ead1e424 211// Initialize the fields in Sized_symbol for SYM in OBJECT.
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212
213template<int size>
214template<bool big_endian>
215void
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216Sized_symbol<size>::init_object(const char* name, const char* version,
217 Object* object,
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218 const elfcpp::Sym<size, big_endian>& sym,
219 unsigned int st_shndx, bool is_ordinary)
14bfc3f5 220{
2ea97941 221 this->init_base_object(name, version, object, sym, st_shndx, is_ordinary);
14bfc3f5 222 this->value_ = sym.get_st_value();
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223 this->symsize_ = sym.get_st_size();
224}
225
226// Initialize the fields in Sized_symbol for a symbol defined in an
227// Output_data.
228
229template<int size>
230void
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231Sized_symbol<size>::init_output_data(const char* name, const char* version,
232 Output_data* od, Value_type value,
233 Size_type symsize, elfcpp::STT type,
234 elfcpp::STB binding,
235 elfcpp::STV visibility,
236 unsigned char nonvis,
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CC
237 bool offset_is_from_end,
238 bool is_predefined)
ead1e424 239{
2ea97941 240 this->init_base_output_data(name, version, od, type, binding, visibility,
5146f448 241 nonvis, offset_is_from_end, is_predefined);
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242 this->value_ = value;
243 this->symsize_ = symsize;
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244}
245
246// Initialize the fields in Sized_symbol for a symbol defined in an
247// Output_segment.
248
249template<int size>
250void
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251Sized_symbol<size>::init_output_segment(const char* name, const char* version,
252 Output_segment* os, Value_type value,
253 Size_type symsize, elfcpp::STT type,
254 elfcpp::STB binding,
255 elfcpp::STV visibility,
256 unsigned char nonvis,
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257 Segment_offset_base offset_base,
258 bool is_predefined)
ead1e424 259{
2ea97941 260 this->init_base_output_segment(name, version, os, type, binding, visibility,
5146f448 261 nonvis, offset_base, is_predefined);
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262 this->value_ = value;
263 this->symsize_ = symsize;
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264}
265
266// Initialize the fields in Sized_symbol for a symbol defined as a
267// constant.
268
269template<int size>
270void
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271Sized_symbol<size>::init_constant(const char* name, const char* version,
272 Value_type value, Size_type symsize,
273 elfcpp::STT type, elfcpp::STB binding,
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274 elfcpp::STV visibility, unsigned char nonvis,
275 bool is_predefined)
ead1e424 276{
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277 this->init_base_constant(name, version, type, binding, visibility, nonvis,
278 is_predefined);
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279 this->value_ = value;
280 this->symsize_ = symsize;
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281}
282
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283// Initialize the fields in Sized_symbol for an undefined symbol.
284
285template<int size>
286void
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287Sized_symbol<size>::init_undefined(const char* name, const char* version,
288 elfcpp::STT type, elfcpp::STB binding,
289 elfcpp::STV visibility, unsigned char nonvis)
f3e9c5c5 290{
2ea97941 291 this->init_base_undefined(name, version, type, binding, visibility, nonvis);
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292 this->value_ = 0;
293 this->symsize_ = 0;
294}
295
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296// Return an allocated string holding the symbol's name as
297// name@version. This is used for relocatable links.
298
299std::string
300Symbol::versioned_name() const
301{
302 gold_assert(this->version_ != NULL);
303 std::string ret = this->name_;
304 ret.push_back('@');
305 if (this->is_def_)
306 ret.push_back('@');
307 ret += this->version_;
308 return ret;
309}
310
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311// Return true if SHNDX represents a common symbol.
312
313bool
2ea97941 314Symbol::is_common_shndx(unsigned int shndx)
8a5e3e08 315{
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316 return (shndx == elfcpp::SHN_COMMON
317 || shndx == parameters->target().small_common_shndx()
318 || shndx == parameters->target().large_common_shndx());
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319}
320
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321// Allocate a common symbol.
322
323template<int size>
324void
2ea97941 325Sized_symbol<size>::allocate_common(Output_data* od, Value_type value)
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326{
327 this->allocate_base_common(od);
2ea97941 328 this->value_ = value;
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329}
330
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331// The ""'s around str ensure str is a string literal, so sizeof works.
332#define strprefix(var, str) (strncmp(var, str, sizeof("" str "") - 1) == 0)
333
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334// Return true if this symbol should be added to the dynamic symbol
335// table.
336
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
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345 // If the symbol is used by a dynamic relocation, we need to add it.
346 if (this->needs_dynsym_entry())
347 return true;
348
6d03d481
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349 // If this symbol's section is not added, the symbol need not be added.
350 // The section may have been GCed. Note that export_dynamic is being
351 // overridden here. This should not be done for shared objects.
352 if (parameters->options().gc_sections()
353 && !parameters->options().shared()
354 && this->source() == Symbol::FROM_OBJECT
355 && !this->object()->is_dynamic())
356 {
357 Relobj* relobj = static_cast<Relobj*>(this->object());
358 bool is_ordinary;
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359 unsigned int shndx = this->shndx(&is_ordinary);
360 if (is_ordinary && shndx != elfcpp::SHN_UNDEF
ce97fa81
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361 && !relobj->is_section_included(shndx)
362 && !symtab->is_section_folded(relobj, shndx))
6d03d481
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363 return false;
364 }
365
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366 // If the symbol was forced dynamic in a --dynamic-list file
367 // or an --export-dynamic-symbol option, add it.
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368 if (!this->is_from_dynobj()
369 && (parameters->options().in_dynamic_list(this->name())
370 || parameters->options().is_export_dynamic_symbol(this->name())))
31821be0
CC
371 {
372 if (!this->is_forced_local())
373 return true;
374 gold_warning(_("Cannot export local symbol '%s'"),
375 this->demangled_name().c_str());
376 return false;
377 }
378
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379 // If the symbol was forced local in a version script, do not add it.
380 if (this->is_forced_local())
381 return false;
382
c82fbeee
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383 // If dynamic-list-data was specified, add any STT_OBJECT.
384 if (parameters->options().dynamic_list_data()
385 && !this->is_from_dynobj()
386 && this->type() == elfcpp::STT_OBJECT)
387 return true;
388
389 // If --dynamic-list-cpp-new was specified, add any new/delete symbol.
390 // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols.
391 if ((parameters->options().dynamic_list_cpp_new()
392 || parameters->options().dynamic_list_cpp_typeinfo())
393 && !this->is_from_dynobj())
394 {
395 // TODO(csilvers): We could probably figure out if we're an operator
396 // new/delete or typeinfo without the need to demangle.
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397 char* demangled_name = cplus_demangle(this->name(),
398 DMGL_ANSI | DMGL_PARAMS);
399 if (demangled_name == NULL)
c82fbeee
CS
400 {
401 // Not a C++ symbol, so it can't satisfy these flags
402 }
403 else if (parameters->options().dynamic_list_cpp_new()
2ea97941
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404 && (strprefix(demangled_name, "operator new")
405 || strprefix(demangled_name, "operator delete")))
c82fbeee 406 {
2ea97941 407 free(demangled_name);
c82fbeee
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408 return true;
409 }
410 else if (parameters->options().dynamic_list_cpp_typeinfo()
2ea97941
ILT
411 && (strprefix(demangled_name, "typeinfo name for")
412 || strprefix(demangled_name, "typeinfo for")))
c82fbeee 413 {
2ea97941 414 free(demangled_name);
c82fbeee
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415 return true;
416 }
417 else
2ea97941 418 free(demangled_name);
c82fbeee
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419 }
420
436ca963
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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
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441 if (parameters->options().output_is_position_independent()
442 || parameters->options().relocatable())
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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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474Output_section*
475Symbol::output_section() const
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476{
477 switch (this->source_)
478 {
479 case FROM_OBJECT:
77e65537 480 {
2ea97941
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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
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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 {
580 Relobj* obj = static_cast<Relobj*>(sym->object());
581 bool is_ordinary;
2ea97941 582 unsigned int shndx = sym->shndx(&is_ordinary);
6d03d481
ST
583 if (is_ordinary)
584 {
585 gold_assert(this->gc_ != NULL);
2ea97941 586 this->gc_->worklist().push(Section_id(obj, shndx));
6d03d481
ST
587 }
588 }
589 }
88a4108b 590
31821be0
CC
591 for (options::String_set::const_iterator p =
592 parameters->options().export_dynamic_symbol_begin();
593 p != parameters->options().export_dynamic_symbol_end();
594 ++p)
595 {
596 const char* name = p->c_str();
597 Symbol* sym = this->lookup(name);
598 gold_assert(sym != NULL);
599 if (sym->source() == Symbol::FROM_OBJECT
600 && !sym->object()->is_dynamic())
601 {
602 Relobj* obj = static_cast<Relobj*>(sym->object());
603 bool is_ordinary;
604 unsigned int shndx = sym->shndx(&is_ordinary);
605 if (is_ordinary)
606 {
607 gold_assert(this->gc_ != NULL);
608 this->gc_->worklist().push(Section_id(obj, shndx));
609 }
610 }
611 }
612
88a4108b
ILT
613 for (Script_options::referenced_const_iterator p =
614 layout->script_options()->referenced_begin();
615 p != layout->script_options()->referenced_end();
616 ++p)
617 {
618 Symbol* sym = this->lookup(p->c_str());
619 gold_assert(sym != NULL);
620 if (sym->source() == Symbol::FROM_OBJECT
621 && !sym->object()->is_dynamic())
622 {
623 Relobj* obj = static_cast<Relobj*>(sym->object());
624 bool is_ordinary;
625 unsigned int shndx = sym->shndx(&is_ordinary);
626 if (is_ordinary)
627 {
628 gold_assert(this->gc_ != NULL);
629 this->gc_->worklist().push(Section_id(obj, shndx));
630 }
631 }
632 }
6d03d481
ST
633}
634
635void
7257cc92 636Symbol_table::gc_mark_symbol(Symbol* sym)
6d03d481 637{
7257cc92
ST
638 // Add the object and section to the work list.
639 Relobj* obj = static_cast<Relobj*>(sym->object());
640 bool is_ordinary;
641 unsigned int shndx = sym->shndx(&is_ordinary);
642 if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
6d03d481 643 {
7257cc92
ST
644 gold_assert(this->gc_!= NULL);
645 this->gc_->worklist().push(Section_id(obj, shndx));
6d03d481
ST
646 }
647}
648
649// When doing garbage collection, keep symbols that have been seen in
650// dynamic objects.
651inline void
652Symbol_table::gc_mark_dyn_syms(Symbol* sym)
653{
654 if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT
655 && !sym->object()->is_dynamic())
7257cc92 656 this->gc_mark_symbol(sym);
6d03d481
ST
657}
658
dd8670e5 659// Make TO a symbol which forwards to FROM.
14bfc3f5
ILT
660
661void
662Symbol_table::make_forwarder(Symbol* from, Symbol* to)
663{
a3ad94ed
ILT
664 gold_assert(from != to);
665 gold_assert(!from->is_forwarder() && !to->is_forwarder());
14bfc3f5
ILT
666 this->forwarders_[from] = to;
667 from->set_forwarder();
668}
669
61ba1cf9
ILT
670// Resolve the forwards from FROM, returning the real symbol.
671
14bfc3f5 672Symbol*
c06b7b0b 673Symbol_table::resolve_forwards(const Symbol* from) const
14bfc3f5 674{
a3ad94ed 675 gold_assert(from->is_forwarder());
c06b7b0b 676 Unordered_map<const Symbol*, Symbol*>::const_iterator p =
14bfc3f5 677 this->forwarders_.find(from);
a3ad94ed 678 gold_assert(p != this->forwarders_.end());
14bfc3f5
ILT
679 return p->second;
680}
681
61ba1cf9
ILT
682// Look up a symbol by name.
683
684Symbol*
2ea97941 685Symbol_table::lookup(const char* name, const char* version) const
61ba1cf9 686{
f0641a0b 687 Stringpool::Key name_key;
2ea97941
ILT
688 name = this->namepool_.find(name, &name_key);
689 if (name == NULL)
61ba1cf9 690 return NULL;
f0641a0b
ILT
691
692 Stringpool::Key version_key = 0;
2ea97941 693 if (version != NULL)
61ba1cf9 694 {
2ea97941
ILT
695 version = this->namepool_.find(version, &version_key);
696 if (version == NULL)
61ba1cf9
ILT
697 return NULL;
698 }
699
f0641a0b 700 Symbol_table_key key(name_key, version_key);
61ba1cf9
ILT
701 Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
702 if (p == this->table_.end())
703 return NULL;
704 return p->second;
705}
706
14bfc3f5
ILT
707// Resolve a Symbol with another Symbol. This is only used in the
708// unusual case where there are references to both an unversioned
709// symbol and a symbol with a version, and we then discover that that
1564db8d
ILT
710// version is the default version. Because this is unusual, we do
711// this the slow way, by converting back to an ELF symbol.
14bfc3f5 712
1564db8d 713template<int size, bool big_endian>
14bfc3f5 714void
95d14cd3 715Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from)
14bfc3f5 716{
1564db8d
ILT
717 unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
718 elfcpp::Sym_write<size, big_endian> esym(buf);
d491d34e 719 // We don't bother to set the st_name or the st_shndx field.
1564db8d
ILT
720 esym.put_st_value(from->value());
721 esym.put_st_size(from->symsize());
722 esym.put_st_info(from->binding(), from->type());
ead1e424 723 esym.put_st_other(from->visibility(), from->nonvis());
d491d34e 724 bool is_ordinary;
2ea97941
ILT
725 unsigned int shndx = from->shndx(&is_ordinary);
726 this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(),
95d14cd3 727 from->version());
1ebd95fd
ILT
728 if (from->in_reg())
729 to->set_in_reg();
730 if (from->in_dyn())
731 to->set_in_dyn();
6d03d481
ST
732 if (parameters->options().gc_sections())
733 this->gc_mark_dyn_syms(to);
14bfc3f5
ILT
734}
735
0602e05a
ILT
736// Record that a symbol is forced to be local by a version script or
737// by visibility.
55a93433
ILT
738
739void
740Symbol_table::force_local(Symbol* sym)
741{
742 if (!sym->is_defined() && !sym->is_common())
743 return;
744 if (sym->is_forced_local())
745 {
746 // We already got this one.
747 return;
748 }
749 sym->set_is_forced_local();
750 this->forced_locals_.push_back(sym);
751}
752
0864d551
ILT
753// Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
754// is only called for undefined symbols, when at least one --wrap
755// option was used.
756
757const char*
2ea97941 758Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key)
0864d551
ILT
759{
760 // For some targets, we need to ignore a specific character when
761 // wrapping, and add it back later.
762 char prefix = '\0';
2ea97941 763 if (name[0] == parameters->target().wrap_char())
0864d551 764 {
2ea97941
ILT
765 prefix = name[0];
766 ++name;
0864d551
ILT
767 }
768
2ea97941 769 if (parameters->options().is_wrap(name))
0864d551
ILT
770 {
771 // Turn NAME into __wrap_NAME.
772 std::string s;
773 if (prefix != '\0')
774 s += prefix;
775 s += "__wrap_";
2ea97941 776 s += name;
0864d551
ILT
777
778 // This will give us both the old and new name in NAMEPOOL_, but
779 // that is OK. Only the versions we need will wind up in the
780 // real string table in the output file.
781 return this->namepool_.add(s.c_str(), true, name_key);
782 }
783
784 const char* const real_prefix = "__real_";
785 const size_t real_prefix_length = strlen(real_prefix);
2ea97941
ILT
786 if (strncmp(name, real_prefix, real_prefix_length) == 0
787 && parameters->options().is_wrap(name + real_prefix_length))
0864d551
ILT
788 {
789 // Turn __real_NAME into NAME.
790 std::string s;
791 if (prefix != '\0')
792 s += prefix;
2ea97941 793 s += name + real_prefix_length;
0864d551
ILT
794 return this->namepool_.add(s.c_str(), true, name_key);
795 }
796
2ea97941 797 return name;
0864d551
ILT
798}
799
8c500701
ILT
800// This is called when we see a symbol NAME/VERSION, and the symbol
801// already exists in the symbol table, and VERSION is marked as being
802// the default version. SYM is the NAME/VERSION symbol we just added.
803// DEFAULT_IS_NEW is true if this is the first time we have seen the
804// symbol NAME/NULL. PDEF points to the entry for NAME/NULL.
805
806template<int size, bool big_endian>
807void
808Symbol_table::define_default_version(Sized_symbol<size>* sym,
809 bool default_is_new,
810 Symbol_table_type::iterator pdef)
811{
812 if (default_is_new)
813 {
814 // This is the first time we have seen NAME/NULL. Make
815 // NAME/NULL point to NAME/VERSION, and mark SYM as the default
816 // version.
817 pdef->second = sym;
818 sym->set_is_default();
819 }
820 else if (pdef->second == sym)
821 {
822 // NAME/NULL already points to NAME/VERSION. Don't mark the
823 // symbol as the default if it is not already the default.
824 }
825 else
826 {
827 // This is the unfortunate case where we already have entries
828 // for both NAME/VERSION and NAME/NULL. We now see a symbol
829 // NAME/VERSION where VERSION is the default version. We have
830 // already resolved this new symbol with the existing
831 // NAME/VERSION symbol.
832
833 // It's possible that NAME/NULL and NAME/VERSION are both
834 // defined in regular objects. This can only happen if one
835 // object file defines foo and another defines foo@@ver. This
836 // is somewhat obscure, but we call it a multiple definition
837 // error.
838
839 // It's possible that NAME/NULL actually has a version, in which
840 // case it won't be the same as VERSION. This happens with
841 // ver_test_7.so in the testsuite for the symbol t2_2. We see
842 // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We
843 // then see an unadorned t2_2 in an object file and give it
844 // version VER1 from the version script. This looks like a
845 // default definition for VER1, so it looks like we should merge
846 // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's
847 // not obvious that this is an error, either. So we just punt.
848
849 // If one of the symbols has non-default visibility, and the
850 // other is defined in a shared object, then they are different
851 // symbols.
852
853 // Otherwise, we just resolve the symbols as though they were
854 // the same.
855
856 if (pdef->second->version() != NULL)
857 gold_assert(pdef->second->version() != sym->version());
858 else if (sym->visibility() != elfcpp::STV_DEFAULT
859 && pdef->second->is_from_dynobj())
860 ;
861 else if (pdef->second->visibility() != elfcpp::STV_DEFAULT
862 && sym->is_from_dynobj())
863 ;
864 else
865 {
866 const Sized_symbol<size>* symdef;
867 symdef = this->get_sized_symbol<size>(pdef->second);
868 Symbol_table::resolve<size, big_endian>(sym, symdef);
869 this->make_forwarder(pdef->second, sym);
870 pdef->second = sym;
871 sym->set_is_default();
872 }
873 }
874}
875
14bfc3f5
ILT
876// Add one symbol from OBJECT to the symbol table. NAME is symbol
877// name and VERSION is the version; both are canonicalized. DEF is
d491d34e
ILT
878// whether this is the default version. ST_SHNDX is the symbol's
879// section index; IS_ORDINARY is whether this is a normal section
880// rather than a special code.
14bfc3f5 881
8781f709
ILT
882// If IS_DEFAULT_VERSION is true, then this is the definition of a
883// default version of a symbol. That means that any lookup of
884// NAME/NULL and any lookup of NAME/VERSION should always return the
885// same symbol. This is obvious for references, but in particular we
886// want to do this for definitions: overriding NAME/NULL should also
887// override NAME/VERSION. If we don't do that, it would be very hard
888// to override functions in a shared library which uses versioning.
14bfc3f5
ILT
889
890// We implement this by simply making both entries in the hash table
891// point to the same Symbol structure. That is easy enough if this is
892// the first time we see NAME/NULL or NAME/VERSION, but it is possible
893// that we have seen both already, in which case they will both have
894// independent entries in the symbol table. We can't simply change
895// the symbol table entry, because we have pointers to the entries
896// attached to the object files. So we mark the entry attached to the
897// object file as a forwarder, and record it in the forwarders_ map.
898// Note that entries in the hash table will never be marked as
899// forwarders.
70e654ba 900//
d491d34e
ILT
901// ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
902// ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
903// for a special section code. ST_SHNDX may be modified if the symbol
904// is defined in a section being discarded.
14bfc3f5
ILT
905
906template<int size, bool big_endian>
aeddab66 907Sized_symbol<size>*
2ea97941 908Symbol_table::add_from_object(Object* object,
ca09d69a 909 const char* name,
f0641a0b 910 Stringpool::Key name_key,
ca09d69a 911 const char* version,
f0641a0b 912 Stringpool::Key version_key,
8781f709 913 bool is_default_version,
70e654ba 914 const elfcpp::Sym<size, big_endian>& sym,
d491d34e
ILT
915 unsigned int st_shndx,
916 bool is_ordinary,
917 unsigned int orig_st_shndx)
14bfc3f5 918{
c5818ff1 919 // Print a message if this symbol is being traced.
2ea97941 920 if (parameters->options().is_trace_symbol(name))
c5818ff1 921 {
d491d34e 922 if (orig_st_shndx == elfcpp::SHN_UNDEF)
2ea97941 923 gold_info(_("%s: reference to %s"), object->name().c_str(), name);
c5818ff1 924 else
2ea97941 925 gold_info(_("%s: definition of %s"), object->name().c_str(), name);
c5818ff1
CC
926 }
927
0864d551
ILT
928 // For an undefined symbol, we may need to adjust the name using
929 // --wrap.
d491d34e 930 if (orig_st_shndx == elfcpp::SHN_UNDEF
c5818ff1 931 && parameters->options().any_wrap())
0864d551 932 {
2ea97941
ILT
933 const char* wrap_name = this->wrap_symbol(name, &name_key);
934 if (wrap_name != name)
0864d551
ILT
935 {
936 // If we see a reference to malloc with version GLIBC_2.0,
937 // and we turn it into a reference to __wrap_malloc, then we
938 // discard the version number. Otherwise the user would be
939 // required to specify the correct version for
940 // __wrap_malloc.
2ea97941 941 version = NULL;
0864d551 942 version_key = 0;
2ea97941 943 name = wrap_name;
0864d551
ILT
944 }
945 }
946
14bfc3f5
ILT
947 Symbol* const snull = NULL;
948 std::pair<typename Symbol_table_type::iterator, bool> ins =
f0641a0b
ILT
949 this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
950 snull));
14bfc3f5 951
8781f709 952 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
14bfc3f5 953 std::make_pair(this->table_.end(), false);
8781f709 954 if (is_default_version)
14bfc3f5 955 {
f0641a0b 956 const Stringpool::Key vnull_key = 0;
8781f709
ILT
957 insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key,
958 vnull_key),
959 snull));
14bfc3f5
ILT
960 }
961
962 // ins.first: an iterator, which is a pointer to a pair.
963 // ins.first->first: the key (a pair of name and version).
964 // ins.first->second: the value (Symbol*).
965 // ins.second: true if new entry was inserted, false if not.
966
1564db8d 967 Sized_symbol<size>* ret;
ead1e424
ILT
968 bool was_undefined;
969 bool was_common;
14bfc3f5
ILT
970 if (!ins.second)
971 {
972 // We already have an entry for NAME/VERSION.
7d1a9ebb 973 ret = this->get_sized_symbol<size>(ins.first->second);
a3ad94ed 974 gold_assert(ret != NULL);
ead1e424
ILT
975
976 was_undefined = ret->is_undefined();
977 was_common = ret->is_common();
978
2ea97941
ILT
979 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
980 version);
6d03d481
ST
981 if (parameters->options().gc_sections())
982 this->gc_mark_dyn_syms(ret);
14bfc3f5 983
8781f709
ILT
984 if (is_default_version)
985 this->define_default_version<size, big_endian>(ret, insdefault.second,
986 insdefault.first);
14bfc3f5
ILT
987 }
988 else
989 {
990 // This is the first time we have seen NAME/VERSION.
a3ad94ed 991 gold_assert(ins.first->second == NULL);
ead1e424 992
8781f709 993 if (is_default_version && !insdefault.second)
14bfc3f5 994 {
14b31740
ILT
995 // We already have an entry for NAME/NULL. If we override
996 // it, then change it to NAME/VERSION.
8781f709 997 ret = this->get_sized_symbol<size>(insdefault.first->second);
18e6b24e
ILT
998
999 was_undefined = ret->is_undefined();
1000 was_common = ret->is_common();
1001
2ea97941
ILT
1002 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
1003 version);
6d03d481
ST
1004 if (parameters->options().gc_sections())
1005 this->gc_mark_dyn_syms(ret);
14bfc3f5
ILT
1006 ins.first->second = ret;
1007 }
1008 else
1009 {
18e6b24e
ILT
1010 was_undefined = false;
1011 was_common = false;
1012
f6ce93d6 1013 Sized_target<size, big_endian>* target =
029ba973 1014 parameters->sized_target<size, big_endian>();
1564db8d
ILT
1015 if (!target->has_make_symbol())
1016 ret = new Sized_symbol<size>();
1017 else
14bfc3f5 1018 {
1564db8d
ILT
1019 ret = target->make_symbol();
1020 if (ret == NULL)
14bfc3f5
ILT
1021 {
1022 // This means that we don't want a symbol table
1023 // entry after all.
8781f709 1024 if (!is_default_version)
14bfc3f5
ILT
1025 this->table_.erase(ins.first);
1026 else
1027 {
8781f709
ILT
1028 this->table_.erase(insdefault.first);
1029 // Inserting INSDEFAULT invalidated INS.
f0641a0b
ILT
1030 this->table_.erase(std::make_pair(name_key,
1031 version_key));
14bfc3f5
ILT
1032 }
1033 return NULL;
1034 }
1035 }
14bfc3f5 1036
2ea97941 1037 ret->init_object(name, version, object, sym, st_shndx, is_ordinary);
1564db8d 1038
14bfc3f5 1039 ins.first->second = ret;
8781f709 1040 if (is_default_version)
14bfc3f5
ILT
1041 {
1042 // This is the first time we have seen NAME/NULL. Point
1043 // it at the new entry for NAME/VERSION.
8781f709
ILT
1044 gold_assert(insdefault.second);
1045 insdefault.first->second = ret;
14bfc3f5
ILT
1046 }
1047 }
8c500701 1048
8781f709 1049 if (is_default_version)
8c500701 1050 ret->set_is_default();
14bfc3f5
ILT
1051 }
1052
ead1e424
ILT
1053 // Record every time we see a new undefined symbol, to speed up
1054 // archive groups.
1055 if (!was_undefined && ret->is_undefined())
0f3b89d8
ILT
1056 {
1057 ++this->saw_undefined_;
1058 if (parameters->options().has_plugins())
1059 parameters->options().plugins()->new_undefined_symbol(ret);
1060 }
ead1e424
ILT
1061
1062 // Keep track of common symbols, to speed up common symbol
1063 // allocation.
1064 if (!was_common && ret->is_common())
155a0dd7 1065 {
8a5e3e08 1066 if (ret->type() == elfcpp::STT_TLS)
155a0dd7 1067 this->tls_commons_.push_back(ret);
8a5e3e08
ILT
1068 else if (!is_ordinary
1069 && st_shndx == parameters->target().small_common_shndx())
1070 this->small_commons_.push_back(ret);
1071 else if (!is_ordinary
1072 && st_shndx == parameters->target().large_common_shndx())
1073 this->large_commons_.push_back(ret);
1074 else
1075 this->commons_.push_back(ret);
155a0dd7 1076 }
ead1e424 1077
0602e05a
ILT
1078 // If we're not doing a relocatable link, then any symbol with
1079 // hidden or internal visibility is local.
1080 if ((ret->visibility() == elfcpp::STV_HIDDEN
1081 || ret->visibility() == elfcpp::STV_INTERNAL)
1082 && (ret->binding() == elfcpp::STB_GLOBAL
adcf2816 1083 || ret->binding() == elfcpp::STB_GNU_UNIQUE
0602e05a
ILT
1084 || ret->binding() == elfcpp::STB_WEAK)
1085 && !parameters->options().relocatable())
1086 this->force_local(ret);
1087
14bfc3f5
ILT
1088 return ret;
1089}
1090
f6ce93d6 1091// Add all the symbols in a relocatable object to the hash table.
14bfc3f5
ILT
1092
1093template<int size, bool big_endian>
1094void
dbe717ef 1095Symbol_table::add_from_relobj(
6fa2a40b 1096 Sized_relobj_file<size, big_endian>* relobj,
f6ce93d6 1097 const unsigned char* syms,
14bfc3f5 1098 size_t count,
d491d34e 1099 size_t symndx_offset,
14bfc3f5
ILT
1100 const char* sym_names,
1101 size_t sym_name_size,
6fa2a40b 1102 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
ca09d69a 1103 size_t* defined)
14bfc3f5 1104{
92de84a6
ILT
1105 *defined = 0;
1106
8851ecca 1107 gold_assert(size == parameters->target().get_size());
14bfc3f5 1108
a783673b
ILT
1109 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1110
88dd47ac
ILT
1111 const bool just_symbols = relobj->just_symbols();
1112
f6ce93d6 1113 const unsigned char* p = syms;
a783673b 1114 for (size_t i = 0; i < count; ++i, p += sym_size)
14bfc3f5 1115 {
92de84a6
ILT
1116 (*sympointers)[i] = NULL;
1117
14bfc3f5
ILT
1118 elfcpp::Sym<size, big_endian> sym(p);
1119
d491d34e 1120 unsigned int st_name = sym.get_st_name();
14bfc3f5
ILT
1121 if (st_name >= sym_name_size)
1122 {
75f2446e
ILT
1123 relobj->error(_("bad global symbol name offset %u at %zu"),
1124 st_name, i);
1125 continue;
14bfc3f5
ILT
1126 }
1127
2ea97941 1128 const char* name = sym_names + st_name;
dbe717ef 1129
d491d34e
ILT
1130 bool is_ordinary;
1131 unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset,
1132 sym.get_st_shndx(),
1133 &is_ordinary);
1134 unsigned int orig_st_shndx = st_shndx;
1135 if (!is_ordinary)
1136 orig_st_shndx = elfcpp::SHN_UNDEF;
1137
92de84a6
ILT
1138 if (st_shndx != elfcpp::SHN_UNDEF)
1139 ++*defined;
1140
a783673b
ILT
1141 // A symbol defined in a section which we are not including must
1142 // be treated as an undefined symbol.
880cd20d 1143 bool is_defined_in_discarded_section = false;
a783673b 1144 if (st_shndx != elfcpp::SHN_UNDEF
d491d34e 1145 && is_ordinary
ce97fa81
ST
1146 && !relobj->is_section_included(st_shndx)
1147 && !this->is_section_folded(relobj, st_shndx))
880cd20d
ILT
1148 {
1149 st_shndx = elfcpp::SHN_UNDEF;
1150 is_defined_in_discarded_section = true;
1151 }
a783673b 1152
14bfc3f5
ILT
1153 // In an object file, an '@' in the name separates the symbol
1154 // name from the version name. If there are two '@' characters,
1155 // this is the default version.
2ea97941 1156 const char* ver = strchr(name, '@');
057ead22 1157 Stringpool::Key ver_key = 0;
09124467 1158 int namelen = 0;
8781f709
ILT
1159 // IS_DEFAULT_VERSION: is the version default?
1160 // IS_FORCED_LOCAL: is the symbol forced local?
1161 bool is_default_version = false;
1162 bool is_forced_local = false;
09124467 1163
a7dac153
CC
1164 // FIXME: For incremental links, we don't store version information,
1165 // so we need to ignore version symbols for now.
1166 if (parameters->incremental_update() && ver != NULL)
1167 {
1168 namelen = ver - name;
1169 ver = NULL;
1170 }
1171
09124467
ILT
1172 if (ver != NULL)
1173 {
1174 // The symbol name is of the form foo@VERSION or foo@@VERSION
2ea97941 1175 namelen = ver - name;
09124467
ILT
1176 ++ver;
1177 if (*ver == '@')
1178 {
8781f709 1179 is_default_version = true;
09124467
ILT
1180 ++ver;
1181 }
057ead22 1182 ver = this->namepool_.add(ver, true, &ver_key);
09124467 1183 }
5871526f
ILT
1184 // We don't want to assign a version to an undefined symbol,
1185 // even if it is listed in the version script. FIXME: What
1186 // about a common symbol?
057ead22
ILT
1187 else
1188 {
2ea97941 1189 namelen = strlen(name);
057ead22
ILT
1190 if (!this->version_script_.empty()
1191 && st_shndx != elfcpp::SHN_UNDEF)
1192 {
1193 // The symbol name did not have a version, but the
1194 // version script may assign a version anyway.
2ea97941 1195 std::string version;
98e090bd
ILT
1196 bool is_global;
1197 if (this->version_script_.get_symbol_version(name, &version,
1198 &is_global))
057ead22 1199 {
98e090bd
ILT
1200 if (!is_global)
1201 is_forced_local = true;
1202 else if (!version.empty())
057ead22 1203 {
2ea97941
ILT
1204 ver = this->namepool_.add_with_length(version.c_str(),
1205 version.length(),
057ead22
ILT
1206 true,
1207 &ver_key);
8781f709 1208 is_default_version = true;
057ead22
ILT
1209 }
1210 }
057ead22
ILT
1211 }
1212 }
14bfc3f5 1213
d491d34e
ILT
1214 elfcpp::Sym<size, big_endian>* psym = &sym;
1215 unsigned char symbuf[sym_size];
1216 elfcpp::Sym<size, big_endian> sym2(symbuf);
88dd47ac
ILT
1217 if (just_symbols)
1218 {
d491d34e 1219 memcpy(symbuf, p, sym_size);
88dd47ac 1220 elfcpp::Sym_write<size, big_endian> sw(symbuf);
9590bf25
CC
1221 if (orig_st_shndx != elfcpp::SHN_UNDEF
1222 && is_ordinary
1223 && relobj->e_type() == elfcpp::ET_REL)
88dd47ac 1224 {
9590bf25
CC
1225 // Symbol values in relocatable object files are section
1226 // relative. This is normally what we want, but since here
1227 // we are converting the symbol to absolute we need to add
1228 // the section address. The section address in an object
88dd47ac
ILT
1229 // file is normally zero, but people can use a linker
1230 // script to change it.
d491d34e
ILT
1231 sw.put_st_value(sym.get_st_value()
1232 + relobj->section_address(orig_st_shndx));
88dd47ac 1233 }
d491d34e
ILT
1234 st_shndx = elfcpp::SHN_ABS;
1235 is_ordinary = false;
88dd47ac
ILT
1236 psym = &sym2;
1237 }
1238
65514900 1239 // Fix up visibility if object has no-export set.
1c74fab0
ILT
1240 if (relobj->no_export()
1241 && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary))
65514900
CC
1242 {
1243 // We may have copied symbol already above.
1244 if (psym != &sym2)
1245 {
1246 memcpy(symbuf, p, sym_size);
1247 psym = &sym2;
1248 }
1249
1250 elfcpp::STV visibility = sym2.get_st_visibility();
1251 if (visibility == elfcpp::STV_DEFAULT
1252 || visibility == elfcpp::STV_PROTECTED)
1253 {
1254 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1255 unsigned char nonvis = sym2.get_st_nonvis();
1256 sw.put_st_other(elfcpp::STV_HIDDEN, nonvis);
1257 }
1258 }
1259
057ead22 1260 Stringpool::Key name_key;
2ea97941 1261 name = this->namepool_.add_with_length(name, namelen, true,
057ead22
ILT
1262 &name_key);
1263
aeddab66 1264 Sized_symbol<size>* res;
2ea97941 1265 res = this->add_from_object(relobj, name, name_key, ver, ver_key,
8781f709
ILT
1266 is_default_version, *psym, st_shndx,
1267 is_ordinary, orig_st_shndx);
6d03d481 1268
804eb480
ST
1269 if (is_forced_local)
1270 this->force_local(res);
1271
7257cc92
ST
1272 // Do not treat this symbol as garbage if this symbol will be
1273 // exported to the dynamic symbol table. This is true when
1274 // building a shared library or using --export-dynamic and
1275 // the symbol is externally visible.
1276 if (parameters->options().gc_sections()
1277 && res->is_externally_visible()
1278 && !res->is_from_dynobj()
1279 && (parameters->options().shared()
1280 || parameters->options().export_dynamic()))
1281 this->gc_mark_symbol(res);
f0641a0b 1282
880cd20d
ILT
1283 if (is_defined_in_discarded_section)
1284 res->set_is_defined_in_discarded_section();
1285
730cdc88 1286 (*sympointers)[i] = res;
14bfc3f5
ILT
1287 }
1288}
1289
89fc3421
CC
1290// Add a symbol from a plugin-claimed file.
1291
1292template<int size, bool big_endian>
1293Symbol*
1294Symbol_table::add_from_pluginobj(
1295 Sized_pluginobj<size, big_endian>* obj,
2ea97941 1296 const char* name,
89fc3421
CC
1297 const char* ver,
1298 elfcpp::Sym<size, big_endian>* sym)
1299{
1300 unsigned int st_shndx = sym->get_st_shndx();
24998053 1301 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
89fc3421
CC
1302
1303 Stringpool::Key ver_key = 0;
8781f709
ILT
1304 bool is_default_version = false;
1305 bool is_forced_local = false;
89fc3421
CC
1306
1307 if (ver != NULL)
1308 {
1309 ver = this->namepool_.add(ver, true, &ver_key);
1310 }
1311 // We don't want to assign a version to an undefined symbol,
1312 // even if it is listed in the version script. FIXME: What
1313 // about a common symbol?
1314 else
1315 {
1316 if (!this->version_script_.empty()
1317 && st_shndx != elfcpp::SHN_UNDEF)
1318 {
1319 // The symbol name did not have a version, but the
1320 // version script may assign a version anyway.
2ea97941 1321 std::string version;
98e090bd
ILT
1322 bool is_global;
1323 if (this->version_script_.get_symbol_version(name, &version,
1324 &is_global))
89fc3421 1325 {
98e090bd
ILT
1326 if (!is_global)
1327 is_forced_local = true;
1328 else if (!version.empty())
89fc3421 1329 {
2ea97941
ILT
1330 ver = this->namepool_.add_with_length(version.c_str(),
1331 version.length(),
89fc3421
CC
1332 true,
1333 &ver_key);
8781f709 1334 is_default_version = true;
89fc3421
CC
1335 }
1336 }
89fc3421
CC
1337 }
1338 }
1339
1340 Stringpool::Key name_key;
2ea97941 1341 name = this->namepool_.add(name, true, &name_key);
89fc3421
CC
1342
1343 Sized_symbol<size>* res;
2ea97941 1344 res = this->add_from_object(obj, name, name_key, ver, ver_key,
8781f709
ILT
1345 is_default_version, *sym, st_shndx,
1346 is_ordinary, st_shndx);
89fc3421 1347
8781f709 1348 if (is_forced_local)
0602e05a 1349 this->force_local(res);
89fc3421
CC
1350
1351 return res;
1352}
1353
dbe717ef
ILT
1354// Add all the symbols in a dynamic object to the hash table.
1355
1356template<int size, bool big_endian>
1357void
1358Symbol_table::add_from_dynobj(
1359 Sized_dynobj<size, big_endian>* dynobj,
1360 const unsigned char* syms,
1361 size_t count,
1362 const char* sym_names,
1363 size_t sym_name_size,
1364 const unsigned char* versym,
1365 size_t versym_size,
92de84a6 1366 const std::vector<const char*>* version_map,
6fa2a40b 1367 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
92de84a6 1368 size_t* defined)
dbe717ef 1369{
92de84a6
ILT
1370 *defined = 0;
1371
8851ecca 1372 gold_assert(size == parameters->target().get_size());
dbe717ef 1373
88dd47ac
ILT
1374 if (dynobj->just_symbols())
1375 {
1376 gold_error(_("--just-symbols does not make sense with a shared object"));
1377 return;
1378 }
1379
a7dac153
CC
1380 // FIXME: For incremental links, we don't store version information,
1381 // so we need to ignore version symbols for now.
1382 if (parameters->incremental_update())
1383 versym = NULL;
1384
dbe717ef
ILT
1385 if (versym != NULL && versym_size / 2 < count)
1386 {
75f2446e
ILT
1387 dynobj->error(_("too few symbol versions"));
1388 return;
dbe717ef
ILT
1389 }
1390
1391 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1392
aeddab66
ILT
1393 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1394 // weak aliases. This is necessary because if the dynamic object
1395 // provides the same variable under two names, one of which is a
1396 // weak definition, and the regular object refers to the weak
1397 // definition, we have to put both the weak definition and the
1398 // strong definition into the dynamic symbol table. Given a weak
1399 // definition, the only way that we can find the corresponding
1400 // strong definition, if any, is to search the symbol table.
1401 std::vector<Sized_symbol<size>*> object_symbols;
1402
dbe717ef
ILT
1403 const unsigned char* p = syms;
1404 const unsigned char* vs = versym;
1405 for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
1406 {
1407 elfcpp::Sym<size, big_endian> sym(p);
1408
92de84a6
ILT
1409 if (sympointers != NULL)
1410 (*sympointers)[i] = NULL;
1411
65778909
ILT
1412 // Ignore symbols with local binding or that have
1413 // internal or hidden visibility.
1414 if (sym.get_st_bind() == elfcpp::STB_LOCAL
1415 || sym.get_st_visibility() == elfcpp::STV_INTERNAL
1416 || sym.get_st_visibility() == elfcpp::STV_HIDDEN)
dbe717ef
ILT
1417 continue;
1418
8bdcdf2c
ILT
1419 // A protected symbol in a shared library must be treated as a
1420 // normal symbol when viewed from outside the shared library.
1421 // Implement this by overriding the visibility here.
1422 elfcpp::Sym<size, big_endian>* psym = &sym;
1423 unsigned char symbuf[sym_size];
1424 elfcpp::Sym<size, big_endian> sym2(symbuf);
1425 if (sym.get_st_visibility() == elfcpp::STV_PROTECTED)
1426 {
1427 memcpy(symbuf, p, sym_size);
1428 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1429 sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis());
1430 psym = &sym2;
1431 }
1432
1433 unsigned int st_name = psym->get_st_name();
dbe717ef
ILT
1434 if (st_name >= sym_name_size)
1435 {
75f2446e
ILT
1436 dynobj->error(_("bad symbol name offset %u at %zu"),
1437 st_name, i);
1438 continue;
dbe717ef
ILT
1439 }
1440
2ea97941 1441 const char* name = sym_names + st_name;
dbe717ef 1442
d491d34e 1443 bool is_ordinary;
8bdcdf2c 1444 unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(),
d491d34e
ILT
1445 &is_ordinary);
1446
92de84a6
ILT
1447 if (st_shndx != elfcpp::SHN_UNDEF)
1448 ++*defined;
1449
aeddab66
ILT
1450 Sized_symbol<size>* res;
1451
dbe717ef
ILT
1452 if (versym == NULL)
1453 {
1454 Stringpool::Key name_key;
2ea97941
ILT
1455 name = this->namepool_.add(name, true, &name_key);
1456 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1457 false, *psym, st_shndx, is_ordinary,
d491d34e 1458 st_shndx);
dbe717ef 1459 }
aeddab66
ILT
1460 else
1461 {
1462 // Read the version information.
dbe717ef 1463
aeddab66 1464 unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
dbe717ef 1465
aeddab66
ILT
1466 bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
1467 v &= elfcpp::VERSYM_VERSION;
dbe717ef 1468
aeddab66
ILT
1469 // The Sun documentation says that V can be VER_NDX_LOCAL,
1470 // or VER_NDX_GLOBAL, or a version index. The meaning of
1471 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1472 // The old GNU linker will happily generate VER_NDX_LOCAL
1473 // for an undefined symbol. I don't know what the Sun
1474 // linker will generate.
dbe717ef 1475
aeddab66 1476 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
d491d34e 1477 && st_shndx != elfcpp::SHN_UNDEF)
aeddab66
ILT
1478 {
1479 // This symbol should not be visible outside the object.
1480 continue;
1481 }
64707334 1482
aeddab66
ILT
1483 // At this point we are definitely going to add this symbol.
1484 Stringpool::Key name_key;
2ea97941 1485 name = this->namepool_.add(name, true, &name_key);
dbe717ef 1486
aeddab66
ILT
1487 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1488 || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
1489 {
1490 // This symbol does not have a version.
2ea97941 1491 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1492 false, *psym, st_shndx, is_ordinary,
d491d34e 1493 st_shndx);
aeddab66
ILT
1494 }
1495 else
1496 {
1497 if (v >= version_map->size())
1498 {
1499 dynobj->error(_("versym for symbol %zu out of range: %u"),
1500 i, v);
1501 continue;
1502 }
dbe717ef 1503
2ea97941
ILT
1504 const char* version = (*version_map)[v];
1505 if (version == NULL)
aeddab66
ILT
1506 {
1507 dynobj->error(_("versym for symbol %zu has no name: %u"),
1508 i, v);
1509 continue;
1510 }
dbe717ef 1511
aeddab66 1512 Stringpool::Key version_key;
2ea97941 1513 version = this->namepool_.add(version, true, &version_key);
aeddab66
ILT
1514
1515 // If this is an absolute symbol, and the version name
1516 // and symbol name are the same, then this is the
1517 // version definition symbol. These symbols exist to
1518 // support using -u to pull in particular versions. We
1519 // do not want to record a version for them.
d491d34e
ILT
1520 if (st_shndx == elfcpp::SHN_ABS
1521 && !is_ordinary
aeddab66 1522 && name_key == version_key)
2ea97941 1523 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
8bdcdf2c 1524 false, *psym, st_shndx, is_ordinary,
d491d34e 1525 st_shndx);
aeddab66
ILT
1526 else
1527 {
8781f709
ILT
1528 const bool is_default_version =
1529 !hidden && st_shndx != elfcpp::SHN_UNDEF;
2ea97941 1530 res = this->add_from_object(dynobj, name, name_key, version,
8781f709
ILT
1531 version_key, is_default_version,
1532 *psym, st_shndx,
d491d34e 1533 is_ordinary, st_shndx);
aeddab66
ILT
1534 }
1535 }
dbe717ef
ILT
1536 }
1537
99a37bfd 1538 // Note that it is possible that RES was overridden by an
a4bb589a 1539 // earlier object, in which case it can't be aliased here.
d491d34e
ILT
1540 if (st_shndx != elfcpp::SHN_UNDEF
1541 && is_ordinary
8bdcdf2c 1542 && psym->get_st_type() == elfcpp::STT_OBJECT
99a37bfd
ILT
1543 && res->source() == Symbol::FROM_OBJECT
1544 && res->object() == dynobj)
aeddab66 1545 object_symbols.push_back(res);
92de84a6
ILT
1546
1547 if (sympointers != NULL)
1548 (*sympointers)[i] = res;
aeddab66
ILT
1549 }
1550
1551 this->record_weak_aliases(&object_symbols);
1552}
1553
cdc29364
CC
1554// Add a symbol from a incremental object file.
1555
1556template<int size, bool big_endian>
26d3c67d 1557Sized_symbol<size>*
cdc29364
CC
1558Symbol_table::add_from_incrobj(
1559 Object* obj,
1560 const char* name,
1561 const char* ver,
1562 elfcpp::Sym<size, big_endian>* sym)
1563{
1564 unsigned int st_shndx = sym->get_st_shndx();
1565 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
1566
1567 Stringpool::Key ver_key = 0;
1568 bool is_default_version = false;
1569 bool is_forced_local = false;
1570
1571 Stringpool::Key name_key;
1572 name = this->namepool_.add(name, true, &name_key);
1573
1574 Sized_symbol<size>* res;
1575 res = this->add_from_object(obj, name, name_key, ver, ver_key,
1576 is_default_version, *sym, st_shndx,
1577 is_ordinary, st_shndx);
1578
1579 if (is_forced_local)
1580 this->force_local(res);
1581
1582 return res;
1583}
1584
aeddab66
ILT
1585// This is used to sort weak aliases. We sort them first by section
1586// index, then by offset, then by weak ahead of strong.
1587
1588template<int size>
1589class Weak_alias_sorter
1590{
1591 public:
1592 bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const;
1593};
1594
1595template<int size>
1596bool
1597Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1,
1598 const Sized_symbol<size>* s2) const
1599{
d491d34e
ILT
1600 bool is_ordinary;
1601 unsigned int s1_shndx = s1->shndx(&is_ordinary);
1602 gold_assert(is_ordinary);
1603 unsigned int s2_shndx = s2->shndx(&is_ordinary);
1604 gold_assert(is_ordinary);
1605 if (s1_shndx != s2_shndx)
1606 return s1_shndx < s2_shndx;
1607
aeddab66
ILT
1608 if (s1->value() != s2->value())
1609 return s1->value() < s2->value();
1610 if (s1->binding() != s2->binding())
1611 {
1612 if (s1->binding() == elfcpp::STB_WEAK)
1613 return true;
1614 if (s2->binding() == elfcpp::STB_WEAK)
1615 return false;
1616 }
1617 return std::string(s1->name()) < std::string(s2->name());
1618}
dbe717ef 1619
aeddab66
ILT
1620// SYMBOLS is a list of object symbols from a dynamic object. Look
1621// for any weak aliases, and record them so that if we add the weak
1622// alias to the dynamic symbol table, we also add the corresponding
1623// strong symbol.
dbe717ef 1624
aeddab66
ILT
1625template<int size>
1626void
1627Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols)
1628{
1629 // Sort the vector by section index, then by offset, then by weak
1630 // ahead of strong.
1631 std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>());
1632
1633 // Walk through the vector. For each weak definition, record
1634 // aliases.
1635 for (typename std::vector<Sized_symbol<size>*>::const_iterator p =
1636 symbols->begin();
1637 p != symbols->end();
1638 ++p)
1639 {
1640 if ((*p)->binding() != elfcpp::STB_WEAK)
1641 continue;
1642
1643 // Build a circular list of weak aliases. Each symbol points to
1644 // the next one in the circular list.
1645
1646 Sized_symbol<size>* from_sym = *p;
1647 typename std::vector<Sized_symbol<size>*>::const_iterator q;
1648 for (q = p + 1; q != symbols->end(); ++q)
dbe717ef 1649 {
d491d34e
ILT
1650 bool dummy;
1651 if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy)
aeddab66
ILT
1652 || (*q)->value() != from_sym->value())
1653 break;
1654
1655 this->weak_aliases_[from_sym] = *q;
1656 from_sym->set_has_alias();
1657 from_sym = *q;
dbe717ef
ILT
1658 }
1659
aeddab66
ILT
1660 if (from_sym != *p)
1661 {
1662 this->weak_aliases_[from_sym] = *p;
1663 from_sym->set_has_alias();
1664 }
dbe717ef 1665
aeddab66 1666 p = q - 1;
dbe717ef
ILT
1667 }
1668}
1669
ead1e424
ILT
1670// Create and return a specially defined symbol. If ONLY_IF_REF is
1671// true, then only create the symbol if there is a reference to it.
86f2e683 1672// If this does not return NULL, it sets *POLDSYM to the existing
8c500701
ILT
1673// symbol if there is one. This sets *RESOLVE_OLDSYM if we should
1674// resolve the newly created symbol to the old one. This
1675// canonicalizes *PNAME and *PVERSION.
ead1e424
ILT
1676
1677template<int size, bool big_endian>
1678Sized_symbol<size>*
9b07f471
ILT
1679Symbol_table::define_special_symbol(const char** pname, const char** pversion,
1680 bool only_if_ref,
8c500701 1681 Sized_symbol<size>** poldsym,
ca09d69a 1682 bool* resolve_oldsym)
ead1e424 1683{
8c500701 1684 *resolve_oldsym = false;
ead1e424 1685
55a93433
ILT
1686 // If the caller didn't give us a version, see if we get one from
1687 // the version script.
057ead22 1688 std::string v;
8c500701 1689 bool is_default_version = false;
55a93433
ILT
1690 if (*pversion == NULL)
1691 {
98e090bd
ILT
1692 bool is_global;
1693 if (this->version_script_.get_symbol_version(*pname, &v, &is_global))
057ead22 1694 {
98e090bd
ILT
1695 if (is_global && !v.empty())
1696 {
1697 *pversion = v.c_str();
1698 // If we get the version from a version script, then we
1699 // are also the default version.
1700 is_default_version = true;
1701 }
057ead22 1702 }
55a93433
ILT
1703 }
1704
8c500701
ILT
1705 Symbol* oldsym;
1706 Sized_symbol<size>* sym;
1707
1708 bool add_to_table = false;
1709 typename Symbol_table_type::iterator add_loc = this->table_.end();
1710 bool add_def_to_table = false;
1711 typename Symbol_table_type::iterator add_def_loc = this->table_.end();
1712
ead1e424
ILT
1713 if (only_if_ref)
1714 {
306d9ef0 1715 oldsym = this->lookup(*pname, *pversion);
8c500701
ILT
1716 if (oldsym == NULL && is_default_version)
1717 oldsym = this->lookup(*pname, NULL);
f6ce93d6 1718 if (oldsym == NULL || !oldsym->is_undefined())
ead1e424 1719 return NULL;
306d9ef0
ILT
1720
1721 *pname = oldsym->name();
eebd87a5
ILT
1722 if (is_default_version)
1723 *pversion = this->namepool_.add(*pversion, true, NULL);
1724 else
8c500701 1725 *pversion = oldsym->version();
ead1e424
ILT
1726 }
1727 else
1728 {
14b31740 1729 // Canonicalize NAME and VERSION.
f0641a0b 1730 Stringpool::Key name_key;
cfd73a4e 1731 *pname = this->namepool_.add(*pname, true, &name_key);
ead1e424 1732
14b31740 1733 Stringpool::Key version_key = 0;
306d9ef0 1734 if (*pversion != NULL)
cfd73a4e 1735 *pversion = this->namepool_.add(*pversion, true, &version_key);
14b31740 1736
ead1e424 1737 Symbol* const snull = NULL;
ead1e424 1738 std::pair<typename Symbol_table_type::iterator, bool> ins =
14b31740
ILT
1739 this->table_.insert(std::make_pair(std::make_pair(name_key,
1740 version_key),
ead1e424
ILT
1741 snull));
1742
8781f709 1743 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
8c500701
ILT
1744 std::make_pair(this->table_.end(), false);
1745 if (is_default_version)
1746 {
1747 const Stringpool::Key vnull = 0;
8781f709
ILT
1748 insdefault =
1749 this->table_.insert(std::make_pair(std::make_pair(name_key,
1750 vnull),
1751 snull));
8c500701
ILT
1752 }
1753
ead1e424
ILT
1754 if (!ins.second)
1755 {
14b31740 1756 // We already have a symbol table entry for NAME/VERSION.
ead1e424 1757 oldsym = ins.first->second;
a3ad94ed 1758 gold_assert(oldsym != NULL);
8c500701
ILT
1759
1760 if (is_default_version)
1761 {
1762 Sized_symbol<size>* soldsym =
1763 this->get_sized_symbol<size>(oldsym);
1764 this->define_default_version<size, big_endian>(soldsym,
8781f709
ILT
1765 insdefault.second,
1766 insdefault.first);
8c500701 1767 }
ead1e424
ILT
1768 }
1769 else
1770 {
1771 // We haven't seen this symbol before.
a3ad94ed 1772 gold_assert(ins.first->second == NULL);
8c500701
ILT
1773
1774 add_to_table = true;
1775 add_loc = ins.first;
1776
8781f709 1777 if (is_default_version && !insdefault.second)
8c500701
ILT
1778 {
1779 // We are adding NAME/VERSION, and it is the default
1780 // version. We already have an entry for NAME/NULL.
8781f709 1781 oldsym = insdefault.first->second;
8c500701
ILT
1782 *resolve_oldsym = true;
1783 }
1784 else
1785 {
1786 oldsym = NULL;
1787
1788 if (is_default_version)
1789 {
1790 add_def_to_table = true;
8781f709 1791 add_def_loc = insdefault.first;
8c500701
ILT
1792 }
1793 }
ead1e424
ILT
1794 }
1795 }
1796
8851ecca
ILT
1797 const Target& target = parameters->target();
1798 if (!target.has_make_symbol())
86f2e683
ILT
1799 sym = new Sized_symbol<size>();
1800 else
ead1e424 1801 {
029ba973
ILT
1802 Sized_target<size, big_endian>* sized_target =
1803 parameters->sized_target<size, big_endian>();
86f2e683
ILT
1804 sym = sized_target->make_symbol();
1805 if (sym == NULL)
1806 return NULL;
1807 }
ead1e424 1808
86f2e683
ILT
1809 if (add_to_table)
1810 add_loc->second = sym;
1811 else
1812 gold_assert(oldsym != NULL);
ead1e424 1813
8c500701
ILT
1814 if (add_def_to_table)
1815 add_def_loc->second = sym;
1816
7d1a9ebb 1817 *poldsym = this->get_sized_symbol<size>(oldsym);
ead1e424
ILT
1818
1819 return sym;
1820}
1821
1822// Define a symbol based on an Output_data.
1823
14b31740 1824Symbol*
2ea97941
ILT
1825Symbol_table::define_in_output_data(const char* name,
1826 const char* version,
99fff23b 1827 Defined defined,
9b07f471 1828 Output_data* od,
2ea97941
ILT
1829 uint64_t value,
1830 uint64_t symsize,
9b07f471
ILT
1831 elfcpp::STT type,
1832 elfcpp::STB binding,
ead1e424
ILT
1833 elfcpp::STV visibility,
1834 unsigned char nonvis,
2ea97941 1835 bool offset_is_from_end,
ead1e424
ILT
1836 bool only_if_ref)
1837{
8851ecca 1838 if (parameters->target().get_size() == 32)
86f2e683
ILT
1839 {
1840#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1841 return this->do_define_in_output_data<32>(name, version, defined, od,
2ea97941 1842 value, symsize, type, binding,
86f2e683 1843 visibility, nonvis,
2ea97941 1844 offset_is_from_end,
86f2e683
ILT
1845 only_if_ref);
1846#else
1847 gold_unreachable();
1848#endif
1849 }
8851ecca 1850 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1851 {
1852#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1853 return this->do_define_in_output_data<64>(name, version, defined, od,
2ea97941 1854 value, symsize, type, binding,
86f2e683 1855 visibility, nonvis,
2ea97941 1856 offset_is_from_end,
86f2e683
ILT
1857 only_if_ref);
1858#else
1859 gold_unreachable();
1860#endif
1861 }
ead1e424 1862 else
a3ad94ed 1863 gold_unreachable();
ead1e424
ILT
1864}
1865
1866// Define a symbol in an Output_data, sized version.
1867
1868template<int size>
14b31740 1869Sized_symbol<size>*
ead1e424 1870Symbol_table::do_define_in_output_data(
2ea97941
ILT
1871 const char* name,
1872 const char* version,
99fff23b 1873 Defined defined,
ead1e424 1874 Output_data* od,
2ea97941
ILT
1875 typename elfcpp::Elf_types<size>::Elf_Addr value,
1876 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1877 elfcpp::STT type,
1878 elfcpp::STB binding,
1879 elfcpp::STV visibility,
1880 unsigned char nonvis,
2ea97941 1881 bool offset_is_from_end,
ead1e424
ILT
1882 bool only_if_ref)
1883{
1884 Sized_symbol<size>* sym;
86f2e683 1885 Sized_symbol<size>* oldsym;
8c500701 1886 bool resolve_oldsym;
ead1e424 1887
8851ecca 1888 if (parameters->target().is_big_endian())
193a53d9
ILT
1889 {
1890#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 1891 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
1892 only_if_ref, &oldsym,
1893 &resolve_oldsym);
193a53d9
ILT
1894#else
1895 gold_unreachable();
1896#endif
1897 }
ead1e424 1898 else
193a53d9
ILT
1899 {
1900#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 1901 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
1902 only_if_ref, &oldsym,
1903 &resolve_oldsym);
193a53d9
ILT
1904#else
1905 gold_unreachable();
1906#endif
1907 }
ead1e424
ILT
1908
1909 if (sym == NULL)
14b31740 1910 return NULL;
ead1e424 1911
2ea97941 1912 sym->init_output_data(name, version, od, value, symsize, type, binding,
5146f448
CC
1913 visibility, nonvis, offset_is_from_end,
1914 defined == PREDEFINED);
14b31740 1915
e5756efb 1916 if (oldsym == NULL)
55a93433
ILT
1917 {
1918 if (binding == elfcpp::STB_LOCAL
2ea97941 1919 || this->version_script_.symbol_is_local(name))
55a93433 1920 this->force_local(sym);
2ea97941 1921 else if (version != NULL)
75517b77 1922 sym->set_is_default();
55a93433
ILT
1923 return sym;
1924 }
86f2e683 1925
62855347 1926 if (Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 1927 this->override_with_special(oldsym, sym);
8c500701
ILT
1928
1929 if (resolve_oldsym)
1930 return sym;
1931 else
1932 {
1933 delete sym;
1934 return oldsym;
1935 }
ead1e424
ILT
1936}
1937
1938// Define a symbol based on an Output_segment.
1939
14b31740 1940Symbol*
2ea97941 1941Symbol_table::define_in_output_segment(const char* name,
99fff23b
ILT
1942 const char* version,
1943 Defined defined,
1944 Output_segment* os,
2ea97941
ILT
1945 uint64_t value,
1946 uint64_t symsize,
9b07f471
ILT
1947 elfcpp::STT type,
1948 elfcpp::STB binding,
ead1e424
ILT
1949 elfcpp::STV visibility,
1950 unsigned char nonvis,
2ea97941 1951 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1952 bool only_if_ref)
1953{
8851ecca 1954 if (parameters->target().get_size() == 32)
86f2e683
ILT
1955 {
1956#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 1957 return this->do_define_in_output_segment<32>(name, version, defined, os,
2ea97941 1958 value, symsize, type,
86f2e683 1959 binding, visibility, nonvis,
2ea97941 1960 offset_base, only_if_ref);
86f2e683
ILT
1961#else
1962 gold_unreachable();
1963#endif
1964 }
8851ecca 1965 else if (parameters->target().get_size() == 64)
86f2e683
ILT
1966 {
1967#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 1968 return this->do_define_in_output_segment<64>(name, version, defined, os,
2ea97941 1969 value, symsize, type,
86f2e683 1970 binding, visibility, nonvis,
2ea97941 1971 offset_base, only_if_ref);
86f2e683
ILT
1972#else
1973 gold_unreachable();
1974#endif
1975 }
ead1e424 1976 else
a3ad94ed 1977 gold_unreachable();
ead1e424
ILT
1978}
1979
1980// Define a symbol in an Output_segment, sized version.
1981
1982template<int size>
14b31740 1983Sized_symbol<size>*
ead1e424 1984Symbol_table::do_define_in_output_segment(
2ea97941
ILT
1985 const char* name,
1986 const char* version,
99fff23b 1987 Defined defined,
ead1e424 1988 Output_segment* os,
2ea97941
ILT
1989 typename elfcpp::Elf_types<size>::Elf_Addr value,
1990 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
1991 elfcpp::STT type,
1992 elfcpp::STB binding,
1993 elfcpp::STV visibility,
1994 unsigned char nonvis,
2ea97941 1995 Symbol::Segment_offset_base offset_base,
ead1e424
ILT
1996 bool only_if_ref)
1997{
1998 Sized_symbol<size>* sym;
86f2e683 1999 Sized_symbol<size>* oldsym;
8c500701 2000 bool resolve_oldsym;
ead1e424 2001
8851ecca 2002 if (parameters->target().is_big_endian())
9025d29d
ILT
2003 {
2004#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 2005 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
2006 only_if_ref, &oldsym,
2007 &resolve_oldsym);
9025d29d
ILT
2008#else
2009 gold_unreachable();
2010#endif
2011 }
ead1e424 2012 else
9025d29d
ILT
2013 {
2014#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 2015 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
2016 only_if_ref, &oldsym,
2017 &resolve_oldsym);
9025d29d
ILT
2018#else
2019 gold_unreachable();
2020#endif
2021 }
ead1e424
ILT
2022
2023 if (sym == NULL)
14b31740 2024 return NULL;
ead1e424 2025
2ea97941 2026 sym->init_output_segment(name, version, os, value, symsize, type, binding,
5146f448
CC
2027 visibility, nonvis, offset_base,
2028 defined == PREDEFINED);
14b31740 2029
e5756efb 2030 if (oldsym == NULL)
55a93433
ILT
2031 {
2032 if (binding == elfcpp::STB_LOCAL
2ea97941 2033 || this->version_script_.symbol_is_local(name))
55a93433 2034 this->force_local(sym);
2ea97941 2035 else if (version != NULL)
75517b77 2036 sym->set_is_default();
55a93433
ILT
2037 return sym;
2038 }
86f2e683 2039
62855347 2040 if (Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 2041 this->override_with_special(oldsym, sym);
8c500701
ILT
2042
2043 if (resolve_oldsym)
2044 return sym;
2045 else
2046 {
2047 delete sym;
2048 return oldsym;
2049 }
ead1e424
ILT
2050}
2051
2052// Define a special symbol with a constant value. It is a multiple
2053// definition error if this symbol is already defined.
2054
14b31740 2055Symbol*
2ea97941
ILT
2056Symbol_table::define_as_constant(const char* name,
2057 const char* version,
99fff23b 2058 Defined defined,
2ea97941
ILT
2059 uint64_t value,
2060 uint64_t symsize,
9b07f471
ILT
2061 elfcpp::STT type,
2062 elfcpp::STB binding,
2063 elfcpp::STV visibility,
2064 unsigned char nonvis,
caa9d5d9
ILT
2065 bool only_if_ref,
2066 bool force_override)
ead1e424 2067{
8851ecca 2068 if (parameters->target().get_size() == 32)
86f2e683
ILT
2069 {
2070#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
99fff23b 2071 return this->do_define_as_constant<32>(name, version, defined, value,
2ea97941 2072 symsize, type, binding,
caa9d5d9
ILT
2073 visibility, nonvis, only_if_ref,
2074 force_override);
86f2e683
ILT
2075#else
2076 gold_unreachable();
2077#endif
2078 }
8851ecca 2079 else if (parameters->target().get_size() == 64)
86f2e683
ILT
2080 {
2081#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
99fff23b 2082 return this->do_define_as_constant<64>(name, version, defined, value,
2ea97941 2083 symsize, type, binding,
caa9d5d9
ILT
2084 visibility, nonvis, only_if_ref,
2085 force_override);
86f2e683
ILT
2086#else
2087 gold_unreachable();
2088#endif
2089 }
ead1e424 2090 else
a3ad94ed 2091 gold_unreachable();
ead1e424
ILT
2092}
2093
2094// Define a symbol as a constant, sized version.
2095
2096template<int size>
14b31740 2097Sized_symbol<size>*
ead1e424 2098Symbol_table::do_define_as_constant(
2ea97941
ILT
2099 const char* name,
2100 const char* version,
99fff23b 2101 Defined defined,
2ea97941
ILT
2102 typename elfcpp::Elf_types<size>::Elf_Addr value,
2103 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
ead1e424
ILT
2104 elfcpp::STT type,
2105 elfcpp::STB binding,
2106 elfcpp::STV visibility,
2107 unsigned char nonvis,
caa9d5d9
ILT
2108 bool only_if_ref,
2109 bool force_override)
ead1e424
ILT
2110{
2111 Sized_symbol<size>* sym;
86f2e683 2112 Sized_symbol<size>* oldsym;
8c500701 2113 bool resolve_oldsym;
ead1e424 2114
8851ecca 2115 if (parameters->target().is_big_endian())
9025d29d
ILT
2116 {
2117#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2ea97941 2118 sym = this->define_special_symbol<size, true>(&name, &version,
8c500701
ILT
2119 only_if_ref, &oldsym,
2120 &resolve_oldsym);
9025d29d
ILT
2121#else
2122 gold_unreachable();
2123#endif
2124 }
ead1e424 2125 else
9025d29d
ILT
2126 {
2127#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2ea97941 2128 sym = this->define_special_symbol<size, false>(&name, &version,
8c500701
ILT
2129 only_if_ref, &oldsym,
2130 &resolve_oldsym);
9025d29d
ILT
2131#else
2132 gold_unreachable();
2133#endif
2134 }
ead1e424
ILT
2135
2136 if (sym == NULL)
14b31740 2137 return NULL;
ead1e424 2138
2ea97941 2139 sym->init_constant(name, version, value, symsize, type, binding, visibility,
5146f448 2140 nonvis, defined == PREDEFINED);
14b31740 2141
e5756efb 2142 if (oldsym == NULL)
55a93433 2143 {
686c8caf
ILT
2144 // Version symbols are absolute symbols with name == version.
2145 // We don't want to force them to be local.
2ea97941
ILT
2146 if ((version == NULL
2147 || name != version
2148 || value != 0)
686c8caf 2149 && (binding == elfcpp::STB_LOCAL
2ea97941 2150 || this->version_script_.symbol_is_local(name)))
55a93433 2151 this->force_local(sym);
2ea97941
ILT
2152 else if (version != NULL
2153 && (name != version || value != 0))
75517b77 2154 sym->set_is_default();
55a93433
ILT
2155 return sym;
2156 }
86f2e683 2157
99fff23b 2158 if (force_override
62855347 2159 || Symbol_table::should_override_with_special(oldsym, type, defined))
e5756efb 2160 this->override_with_special(oldsym, sym);
8c500701
ILT
2161
2162 if (resolve_oldsym)
2163 return sym;
2164 else
2165 {
2166 delete sym;
2167 return oldsym;
2168 }
ead1e424
ILT
2169}
2170
2171// Define a set of symbols in output sections.
2172
2173void
9b07f471 2174Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2175 const Define_symbol_in_section* p,
2176 bool only_if_ref)
ead1e424
ILT
2177{
2178 for (int i = 0; i < count; ++i, ++p)
2179 {
2180 Output_section* os = layout->find_output_section(p->output_section);
2181 if (os != NULL)
99fff23b 2182 this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2183 p->size, p->type, p->binding,
2184 p->visibility, p->nonvis,
a445fddf
ILT
2185 p->offset_is_from_end,
2186 only_if_ref || p->only_if_ref);
ead1e424 2187 else
99fff23b
ILT
2188 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2189 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2190 only_if_ref || p->only_if_ref,
2191 false);
ead1e424
ILT
2192 }
2193}
2194
2195// Define a set of symbols in output segments.
2196
2197void
9b07f471 2198Symbol_table::define_symbols(const Layout* layout, int count,
a445fddf
ILT
2199 const Define_symbol_in_segment* p,
2200 bool only_if_ref)
ead1e424
ILT
2201{
2202 for (int i = 0; i < count; ++i, ++p)
2203 {
2204 Output_segment* os = layout->find_output_segment(p->segment_type,
2205 p->segment_flags_set,
2206 p->segment_flags_clear);
2207 if (os != NULL)
99fff23b 2208 this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value,
14b31740
ILT
2209 p->size, p->type, p->binding,
2210 p->visibility, p->nonvis,
a445fddf
ILT
2211 p->offset_base,
2212 only_if_ref || p->only_if_ref);
ead1e424 2213 else
99fff23b
ILT
2214 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2215 p->type, p->binding, p->visibility, p->nonvis,
caa9d5d9
ILT
2216 only_if_ref || p->only_if_ref,
2217 false);
ead1e424
ILT
2218 }
2219}
2220
46fe1623
ILT
2221// Define CSYM using a COPY reloc. POSD is the Output_data where the
2222// symbol should be defined--typically a .dyn.bss section. VALUE is
2223// the offset within POSD.
2224
2225template<int size>
2226void
fe8718a4 2227Symbol_table::define_with_copy_reloc(
fe8718a4
ILT
2228 Sized_symbol<size>* csym,
2229 Output_data* posd,
2ea97941 2230 typename elfcpp::Elf_types<size>::Elf_Addr value)
46fe1623
ILT
2231{
2232 gold_assert(csym->is_from_dynobj());
2233 gold_assert(!csym->is_copied_from_dynobj());
2ea97941
ILT
2234 Object* object = csym->object();
2235 gold_assert(object->is_dynamic());
2236 Dynobj* dynobj = static_cast<Dynobj*>(object);
46fe1623
ILT
2237
2238 // Our copied variable has to override any variable in a shared
2239 // library.
2240 elfcpp::STB binding = csym->binding();
2241 if (binding == elfcpp::STB_WEAK)
2242 binding = elfcpp::STB_GLOBAL;
2243
99fff23b 2244 this->define_in_output_data(csym->name(), csym->version(), COPY,
2ea97941 2245 posd, value, csym->symsize(),
46fe1623
ILT
2246 csym->type(), binding,
2247 csym->visibility(), csym->nonvis(),
2248 false, false);
2249
2250 csym->set_is_copied_from_dynobj();
2251 csym->set_needs_dynsym_entry();
2252
2253 this->copied_symbol_dynobjs_[csym] = dynobj;
2254
2255 // We have now defined all aliases, but we have not entered them all
2256 // in the copied_symbol_dynobjs_ map.
2257 if (csym->has_alias())
2258 {
2259 Symbol* sym = csym;
2260 while (true)
2261 {
2262 sym = this->weak_aliases_[sym];
2263 if (sym == csym)
2264 break;
2265 gold_assert(sym->output_data() == posd);
2266
2267 sym->set_is_copied_from_dynobj();
2268 this->copied_symbol_dynobjs_[sym] = dynobj;
2269 }
2270 }
2271}
2272
2273// SYM is defined using a COPY reloc. Return the dynamic object where
2274// the original definition was found.
2275
2276Dynobj*
2277Symbol_table::get_copy_source(const Symbol* sym) const
2278{
2279 gold_assert(sym->is_copied_from_dynobj());
2280 Copied_symbol_dynobjs::const_iterator p =
2281 this->copied_symbol_dynobjs_.find(sym);
2282 gold_assert(p != this->copied_symbol_dynobjs_.end());
2283 return p->second;
2284}
2285
f3e9c5c5
ILT
2286// Add any undefined symbols named on the command line.
2287
2288void
88a4108b 2289Symbol_table::add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5 2290{
88a4108b
ILT
2291 if (parameters->options().any_undefined()
2292 || layout->script_options()->any_unreferenced())
f3e9c5c5
ILT
2293 {
2294 if (parameters->target().get_size() == 32)
2295 {
5adf9721 2296#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
88a4108b 2297 this->do_add_undefined_symbols_from_command_line<32>(layout);
f3e9c5c5
ILT
2298#else
2299 gold_unreachable();
2300#endif
2301 }
2302 else if (parameters->target().get_size() == 64)
2303 {
2304#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
88a4108b 2305 this->do_add_undefined_symbols_from_command_line<64>(layout);
f3e9c5c5
ILT
2306#else
2307 gold_unreachable();
2308#endif
2309 }
2310 else
2311 gold_unreachable();
2312 }
2313}
2314
2315template<int size>
2316void
88a4108b 2317Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout)
f3e9c5c5
ILT
2318{
2319 for (options::String_set::const_iterator p =
2320 parameters->options().undefined_begin();
2321 p != parameters->options().undefined_end();
2322 ++p)
88a4108b 2323 this->add_undefined_symbol_from_command_line<size>(p->c_str());
f3e9c5c5 2324
31821be0
CC
2325 for (options::String_set::const_iterator p =
2326 parameters->options().export_dynamic_symbol_begin();
2327 p != parameters->options().export_dynamic_symbol_end();
2328 ++p)
2329 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2330
88a4108b
ILT
2331 for (Script_options::referenced_const_iterator p =
2332 layout->script_options()->referenced_begin();
2333 p != layout->script_options()->referenced_end();
2334 ++p)
2335 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2336}
2337
2338template<int size>
2339void
2340Symbol_table::add_undefined_symbol_from_command_line(const char* name)
2341{
2342 if (this->lookup(name) != NULL)
2343 return;
f3e9c5c5 2344
88a4108b 2345 const char* version = NULL;
f3e9c5c5 2346
88a4108b
ILT
2347 Sized_symbol<size>* sym;
2348 Sized_symbol<size>* oldsym;
2349 bool resolve_oldsym;
2350 if (parameters->target().is_big_endian())
2351 {
f3e9c5c5 2352#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
88a4108b
ILT
2353 sym = this->define_special_symbol<size, true>(&name, &version,
2354 false, &oldsym,
2355 &resolve_oldsym);
f3e9c5c5 2356#else
88a4108b 2357 gold_unreachable();
f3e9c5c5 2358#endif
88a4108b
ILT
2359 }
2360 else
2361 {
f3e9c5c5 2362#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
88a4108b
ILT
2363 sym = this->define_special_symbol<size, false>(&name, &version,
2364 false, &oldsym,
2365 &resolve_oldsym);
f3e9c5c5 2366#else
88a4108b 2367 gold_unreachable();
f3e9c5c5 2368#endif
88a4108b 2369 }
f3e9c5c5 2370
88a4108b 2371 gold_assert(oldsym == NULL);
f3e9c5c5 2372
88a4108b
ILT
2373 sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
2374 elfcpp::STV_DEFAULT, 0);
2375 ++this->saw_undefined_;
f3e9c5c5
ILT
2376}
2377
a3ad94ed
ILT
2378// Set the dynamic symbol indexes. INDEX is the index of the first
2379// global dynamic symbol. Pointers to the symbols are stored into the
2380// vector SYMS. The names are added to DYNPOOL. This returns an
2381// updated dynamic symbol index.
2382
2383unsigned int
9b07f471 2384Symbol_table::set_dynsym_indexes(unsigned int index,
a3ad94ed 2385 std::vector<Symbol*>* syms,
14b31740
ILT
2386 Stringpool* dynpool,
2387 Versions* versions)
a3ad94ed
ILT
2388{
2389 for (Symbol_table_type::iterator p = this->table_.begin();
2390 p != this->table_.end();
2391 ++p)
2392 {
2393 Symbol* sym = p->second;
16649710
ILT
2394
2395 // Note that SYM may already have a dynamic symbol index, since
2396 // some symbols appear more than once in the symbol table, with
2397 // and without a version.
2398
ce97fa81 2399 if (!sym->should_add_dynsym_entry(this))
16649710
ILT
2400 sym->set_dynsym_index(-1U);
2401 else if (!sym->has_dynsym_index())
a3ad94ed
ILT
2402 {
2403 sym->set_dynsym_index(index);
2404 ++index;
2405 syms->push_back(sym);
cfd73a4e 2406 dynpool->add(sym->name(), false, NULL);
14b31740
ILT
2407
2408 // Record any version information.
09124467
ILT
2409 if (sym->version() != NULL)
2410 versions->record_version(this, dynpool, sym);
594c8e5e
ILT
2411
2412 // If the symbol is defined in a dynamic object and is
2413 // referenced in a regular object, then mark the dynamic
2414 // object as needed. This is used to implement --as-needed.
2415 if (sym->is_from_dynobj() && sym->in_reg())
2416 sym->object()->set_is_needed();
a3ad94ed
ILT
2417 }
2418 }
2419
14b31740
ILT
2420 // Finish up the versions. In some cases this may add new dynamic
2421 // symbols.
9b07f471 2422 index = versions->finalize(this, index, syms);
14b31740 2423
a3ad94ed
ILT
2424 return index;
2425}
2426
c06b7b0b 2427// Set the final values for all the symbols. The index of the first
55a93433
ILT
2428// global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
2429// file offset OFF. Add their names to POOL. Return the new file
2430// offset. Update *PLOCAL_SYMCOUNT if necessary.
54dc6425 2431
75f65a3e 2432off_t
55a93433
ILT
2433Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
2434 size_t dyncount, Stringpool* pool,
ca09d69a 2435 unsigned int* plocal_symcount)
54dc6425 2436{
f6ce93d6
ILT
2437 off_t ret;
2438
55a93433
ILT
2439 gold_assert(*plocal_symcount != 0);
2440 this->first_global_index_ = *plocal_symcount;
c06b7b0b 2441
16649710
ILT
2442 this->dynamic_offset_ = dynoff;
2443 this->first_dynamic_global_index_ = dyn_global_index;
2444 this->dynamic_count_ = dyncount;
2445
8851ecca 2446 if (parameters->target().get_size() == 32)
9025d29d
ILT
2447 {
2448#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
55a93433 2449 ret = this->sized_finalize<32>(off, pool, plocal_symcount);
9025d29d
ILT
2450#else
2451 gold_unreachable();
2452#endif
2453 }
8851ecca 2454 else if (parameters->target().get_size() == 64)
9025d29d
ILT
2455 {
2456#if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
55a93433 2457 ret = this->sized_finalize<64>(off, pool, plocal_symcount);
9025d29d
ILT
2458#else
2459 gold_unreachable();
2460#endif
2461 }
61ba1cf9 2462 else
a3ad94ed 2463 gold_unreachable();
f6ce93d6
ILT
2464
2465 // Now that we have the final symbol table, we can reliably note
2466 // which symbols should get warnings.
cb295612 2467 this->warnings_.note_warnings(this);
f6ce93d6
ILT
2468
2469 return ret;
75f65a3e
ILT
2470}
2471
55a93433
ILT
2472// SYM is going into the symbol table at *PINDEX. Add the name to
2473// POOL, update *PINDEX and *POFF.
2474
2475template<int size>
2476void
2477Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool,
2478 unsigned int* pindex, off_t* poff)
2479{
2480 sym->set_symtab_index(*pindex);
6d1c4efb
ILT
2481 if (sym->version() == NULL || !parameters->options().relocatable())
2482 pool->add(sym->name(), false, NULL);
2483 else
2484 pool->add(sym->versioned_name(), true, NULL);
55a93433
ILT
2485 ++*pindex;
2486 *poff += elfcpp::Elf_sizes<size>::sym_size;
2487}
2488
ead1e424
ILT
2489// Set the final value for all the symbols. This is called after
2490// Layout::finalize, so all the output sections have their final
2491// address.
75f65a3e
ILT
2492
2493template<int size>
2494off_t
55a93433
ILT
2495Symbol_table::sized_finalize(off_t off, Stringpool* pool,
2496 unsigned int* plocal_symcount)
75f65a3e 2497{
ead1e424 2498 off = align_address(off, size >> 3);
75f65a3e
ILT
2499 this->offset_ = off;
2500
55a93433
ILT
2501 unsigned int index = *plocal_symcount;
2502 const unsigned int orig_index = index;
c06b7b0b 2503
55a93433
ILT
2504 // First do all the symbols which have been forced to be local, as
2505 // they must appear before all global symbols.
2506 for (Forced_locals::iterator p = this->forced_locals_.begin();
2507 p != this->forced_locals_.end();
2508 ++p)
2509 {
2510 Symbol* sym = *p;
2511 gold_assert(sym->is_forced_local());
2512 if (this->sized_finalize_symbol<size>(sym))
2513 {
2514 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2515 ++*plocal_symcount;
2516 }
2517 }
2518
2519 // Now do all the remaining symbols.
c06b7b0b
ILT
2520 for (Symbol_table_type::iterator p = this->table_.begin();
2521 p != this->table_.end();
2522 ++p)
54dc6425 2523 {
55a93433
ILT
2524 Symbol* sym = p->second;
2525 if (this->sized_finalize_symbol<size>(sym))
2526 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2527 }
54dc6425 2528
55a93433 2529 this->output_count_ = index - orig_index;
a3ad94ed 2530
55a93433
ILT
2531 return off;
2532}
75f65a3e 2533
c0a62865
DK
2534// Compute the final value of SYM and store status in location PSTATUS.
2535// During relaxation, this may be called multiple times for a symbol to
2536// compute its would-be final value in each relaxation pass.
008db82e 2537
55a93433 2538template<int size>
c0a62865
DK
2539typename Sized_symbol<size>::Value_type
2540Symbol_table::compute_final_value(
2541 const Sized_symbol<size>* sym,
2542 Compute_final_value_status* pstatus) const
55a93433 2543{
ef9beddf 2544 typedef typename Sized_symbol<size>::Value_type Value_type;
2ea97941 2545 Value_type value;
ead1e424 2546
55a93433
ILT
2547 switch (sym->source())
2548 {
2549 case Symbol::FROM_OBJECT:
2550 {
d491d34e 2551 bool is_ordinary;
2ea97941 2552 unsigned int shndx = sym->shndx(&is_ordinary);
ead1e424 2553
d491d34e 2554 if (!is_ordinary
2ea97941
ILT
2555 && shndx != elfcpp::SHN_ABS
2556 && !Symbol::is_common_shndx(shndx))
55a93433 2557 {
c0a62865
DK
2558 *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION;
2559 return 0;
ead1e424 2560 }
ead1e424 2561
55a93433
ILT
2562 Object* symobj = sym->object();
2563 if (symobj->is_dynamic())
ead1e424 2564 {
2ea97941
ILT
2565 value = 0;
2566 shndx = elfcpp::SHN_UNDEF;
ead1e424 2567 }
89fc3421
CC
2568 else if (symobj->pluginobj() != NULL)
2569 {
2ea97941
ILT
2570 value = 0;
2571 shndx = elfcpp::SHN_UNDEF;
89fc3421 2572 }
2ea97941
ILT
2573 else if (shndx == elfcpp::SHN_UNDEF)
2574 value = 0;
d491d34e 2575 else if (!is_ordinary
2ea97941
ILT
2576 && (shndx == elfcpp::SHN_ABS
2577 || Symbol::is_common_shndx(shndx)))
2578 value = sym->value();
55a93433 2579 else
ead1e424 2580 {
55a93433 2581 Relobj* relobj = static_cast<Relobj*>(symobj);
2ea97941 2582 Output_section* os = relobj->output_section(shndx);
55a93433 2583
2ea97941 2584 if (this->is_section_folded(relobj, shndx))
ef15dade
ST
2585 {
2586 gold_assert(os == NULL);
2587 // Get the os of the section it is folded onto.
2588 Section_id folded = this->icf_->get_folded_section(relobj,
2ea97941 2589 shndx);
ef15dade
ST
2590 gold_assert(folded.first != NULL);
2591 Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first);
d6344fb5
DK
2592 unsigned folded_shndx = folded.second;
2593
2594 os = folded_obj->output_section(folded_shndx);
ef15dade 2595 gold_assert(os != NULL);
d6344fb5
DK
2596
2597 // Replace (relobj, shndx) with canonical ICF input section.
2598 shndx = folded_shndx;
2599 relobj = folded_obj;
ef15dade
ST
2600 }
2601
d6344fb5 2602 uint64_t secoff64 = relobj->output_section_offset(shndx);
ef15dade 2603 if (os == NULL)
ead1e424 2604 {
6d03d481
ST
2605 bool static_or_reloc = (parameters->doing_static_link() ||
2606 parameters->options().relocatable());
2607 gold_assert(static_or_reloc || sym->dynsym_index() == -1U);
2608
c0a62865
DK
2609 *pstatus = CFVS_NO_OUTPUT_SECTION;
2610 return 0;
ead1e424 2611 }
55a93433 2612
eff45813
CC
2613 if (secoff64 == -1ULL)
2614 {
2615 // The section needs special handling (e.g., a merge section).
ef15dade 2616
2ea97941 2617 value = os->output_address(relobj, shndx, sym->value());
eff45813
CC
2618 }
2619 else
2620 {
2621 Value_type secoff =
2622 convert_types<Value_type, uint64_t>(secoff64);
2623 if (sym->type() == elfcpp::STT_TLS)
2ea97941 2624 value = sym->value() + os->tls_offset() + secoff;
eff45813 2625 else
2ea97941 2626 value = sym->value() + os->address() + secoff;
eff45813 2627 }
ead1e424 2628 }
55a93433
ILT
2629 }
2630 break;
2631
2632 case Symbol::IN_OUTPUT_DATA:
2633 {
2634 Output_data* od = sym->output_data();
2ea97941 2635 value = sym->value();
155a0dd7 2636 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2637 value += od->address();
155a0dd7
ILT
2638 else
2639 {
2640 Output_section* os = od->output_section();
2641 gold_assert(os != NULL);
2ea97941 2642 value += os->tls_offset() + (od->address() - os->address());
155a0dd7 2643 }
55a93433 2644 if (sym->offset_is_from_end())
2ea97941 2645 value += od->data_size();
55a93433
ILT
2646 }
2647 break;
2648
2649 case Symbol::IN_OUTPUT_SEGMENT:
2650 {
2651 Output_segment* os = sym->output_segment();
2ea97941 2652 value = sym->value();
edfbb029 2653 if (sym->type() != elfcpp::STT_TLS)
2ea97941 2654 value += os->vaddr();
55a93433
ILT
2655 switch (sym->offset_base())
2656 {
2657 case Symbol::SEGMENT_START:
2658 break;
2659 case Symbol::SEGMENT_END:
2ea97941 2660 value += os->memsz();
55a93433
ILT
2661 break;
2662 case Symbol::SEGMENT_BSS:
2ea97941 2663 value += os->filesz();
55a93433
ILT
2664 break;
2665 default:
2666 gold_unreachable();
2667 }
2668 }
2669 break;
ead1e424 2670
f3e9c5c5 2671 case Symbol::IS_CONSTANT:
2ea97941 2672 value = sym->value();
55a93433 2673 break;
ead1e424 2674
f3e9c5c5 2675 case Symbol::IS_UNDEFINED:
2ea97941 2676 value = 0;
f3e9c5c5
ILT
2677 break;
2678
55a93433
ILT
2679 default:
2680 gold_unreachable();
2681 }
ead1e424 2682
c0a62865 2683 *pstatus = CFVS_OK;
2ea97941 2684 return value;
c0a62865
DK
2685}
2686
2687// Finalize the symbol SYM. This returns true if the symbol should be
2688// added to the symbol table, false otherwise.
2689
2690template<int size>
2691bool
2692Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
2693{
2694 typedef typename Sized_symbol<size>::Value_type Value_type;
2695
2696 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
2697
2698 // The default version of a symbol may appear twice in the symbol
2699 // table. We only need to finalize it once.
2700 if (sym->has_symtab_index())
2701 return false;
2702
2703 if (!sym->in_reg())
2704 {
2705 gold_assert(!sym->has_symtab_index());
2706 sym->set_symtab_index(-1U);
2707 gold_assert(sym->dynsym_index() == -1U);
2708 return false;
2709 }
2710
badc8139
RÁE
2711 // If the symbol is only present on plugin files, the plugin decided we
2712 // don't need it.
2713 if (!sym->in_real_elf())
2714 {
2715 gold_assert(!sym->has_symtab_index());
2716 sym->set_symtab_index(-1U);
2717 return false;
2718 }
2719
c0a62865
DK
2720 // Compute final symbol value.
2721 Compute_final_value_status status;
2ea97941 2722 Value_type value = this->compute_final_value(sym, &status);
c0a62865
DK
2723
2724 switch (status)
2725 {
2726 case CFVS_OK:
2727 break;
2728 case CFVS_UNSUPPORTED_SYMBOL_SECTION:
2729 {
2730 bool is_ordinary;
2ea97941 2731 unsigned int shndx = sym->shndx(&is_ordinary);
c0a62865 2732 gold_error(_("%s: unsupported symbol section 0x%x"),
2ea97941 2733 sym->demangled_name().c_str(), shndx);
c0a62865
DK
2734 }
2735 break;
2736 case CFVS_NO_OUTPUT_SECTION:
2737 sym->set_symtab_index(-1U);
2738 return false;
2739 default:
2740 gold_unreachable();
2741 }
2742
2ea97941 2743 sym->set_value(value);
9e2dcb77 2744
8c604651
CS
2745 if (parameters->options().strip_all()
2746 || !parameters->options().should_retain_symbol(sym->name()))
55a93433
ILT
2747 {
2748 sym->set_symtab_index(-1U);
2749 return false;
54dc6425 2750 }
75f65a3e 2751
55a93433 2752 return true;
54dc6425
ILT
2753}
2754
61ba1cf9
ILT
2755// Write out the global symbols.
2756
2757void
fd9d194f 2758Symbol_table::write_globals(const Stringpool* sympool,
d491d34e
ILT
2759 const Stringpool* dynpool,
2760 Output_symtab_xindex* symtab_xindex,
2761 Output_symtab_xindex* dynsym_xindex,
2762 Output_file* of) const
61ba1cf9 2763{
8851ecca 2764 switch (parameters->size_and_endianness())
61ba1cf9 2765 {
9025d29d 2766#ifdef HAVE_TARGET_32_LITTLE
8851ecca 2767 case Parameters::TARGET_32_LITTLE:
fd9d194f 2768 this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex,
d491d34e 2769 dynsym_xindex, of);
8851ecca 2770 break;
9025d29d 2771#endif
8851ecca
ILT
2772#ifdef HAVE_TARGET_32_BIG
2773 case Parameters::TARGET_32_BIG:
fd9d194f 2774 this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex,
d491d34e 2775 dynsym_xindex, of);
8851ecca 2776 break;
9025d29d 2777#endif
9025d29d 2778#ifdef HAVE_TARGET_64_LITTLE
8851ecca 2779 case Parameters::TARGET_64_LITTLE:
fd9d194f 2780 this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex,
d491d34e 2781 dynsym_xindex, of);
8851ecca 2782 break;
9025d29d 2783#endif
8851ecca
ILT
2784#ifdef HAVE_TARGET_64_BIG
2785 case Parameters::TARGET_64_BIG:
fd9d194f 2786 this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex,
d491d34e 2787 dynsym_xindex, of);
8851ecca
ILT
2788 break;
2789#endif
2790 default:
2791 gold_unreachable();
61ba1cf9 2792 }
61ba1cf9
ILT
2793}
2794
2795// Write out the global symbols.
2796
2797template<int size, bool big_endian>
2798void
fd9d194f 2799Symbol_table::sized_write_globals(const Stringpool* sympool,
16649710 2800 const Stringpool* dynpool,
d491d34e
ILT
2801 Output_symtab_xindex* symtab_xindex,
2802 Output_symtab_xindex* dynsym_xindex,
61ba1cf9
ILT
2803 Output_file* of) const
2804{
8851ecca 2805 const Target& target = parameters->target();
9a2d6984 2806
61ba1cf9 2807 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
55a93433
ILT
2808
2809 const unsigned int output_count = this->output_count_;
2810 const section_size_type oview_size = output_count * sym_size;
2811 const unsigned int first_global_index = this->first_global_index_;
5fe2a0f5
ILT
2812 unsigned char* psyms;
2813 if (this->offset_ == 0 || output_count == 0)
2814 psyms = NULL;
2815 else
2816 psyms = of->get_output_view(this->offset_, oview_size);
16649710 2817
55a93433
ILT
2818 const unsigned int dynamic_count = this->dynamic_count_;
2819 const section_size_type dynamic_size = dynamic_count * sym_size;
2820 const unsigned int first_dynamic_global_index =
2821 this->first_dynamic_global_index_;
16649710 2822 unsigned char* dynamic_view;
5fe2a0f5 2823 if (this->dynamic_offset_ == 0 || dynamic_count == 0)
16649710
ILT
2824 dynamic_view = NULL;
2825 else
2826 dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
c06b7b0b 2827
61ba1cf9
ILT
2828 for (Symbol_table_type::const_iterator p = this->table_.begin();
2829 p != this->table_.end();
2830 ++p)
2831 {
2832 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
2833
9a2d6984 2834 // Possibly warn about unresolved symbols in shared libraries.
fd9d194f 2835 this->warn_about_undefined_dynobj_symbol(sym);
e2827e5f 2836
a3ad94ed 2837 unsigned int sym_index = sym->symtab_index();
16649710
ILT
2838 unsigned int dynsym_index;
2839 if (dynamic_view == NULL)
2840 dynsym_index = -1U;
2841 else
2842 dynsym_index = sym->dynsym_index();
2843
2844 if (sym_index == -1U && dynsym_index == -1U)
a3ad94ed
ILT
2845 {
2846 // This symbol is not included in the output file.
2847 continue;
2848 }
16649710 2849
2ea97941 2850 unsigned int shndx;
88dd47ac
ILT
2851 typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
2852 typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
ce279a62 2853 elfcpp::STB binding = sym->binding();
9634ed06
CC
2854
2855 // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL.
2856 if (binding == elfcpp::STB_GNU_UNIQUE
2857 && !parameters->options().gnu_unique())
2858 binding = elfcpp::STB_GLOBAL;
2859
ead1e424
ILT
2860 switch (sym->source())
2861 {
2862 case Symbol::FROM_OBJECT:
2863 {
d491d34e
ILT
2864 bool is_ordinary;
2865 unsigned int in_shndx = sym->shndx(&is_ordinary);
ead1e424 2866
d491d34e 2867 if (!is_ordinary
0dfbdef4 2868 && in_shndx != elfcpp::SHN_ABS
8a5e3e08 2869 && !Symbol::is_common_shndx(in_shndx))
ead1e424 2870 {
75f2446e 2871 gold_error(_("%s: unsupported symbol section 0x%x"),
a2b1aa12 2872 sym->demangled_name().c_str(), in_shndx);
2ea97941 2873 shndx = in_shndx;
f6ce93d6 2874 }
ead1e424
ILT
2875 else
2876 {
75f2446e
ILT
2877 Object* symobj = sym->object();
2878 if (symobj->is_dynamic())
2879 {
2880 if (sym->needs_dynsym_value())
8851ecca 2881 dynsym_value = target.dynsym_value(sym);
2ea97941 2882 shndx = elfcpp::SHN_UNDEF;
ce279a62
CC
2883 if (sym->is_undef_binding_weak())
2884 binding = elfcpp::STB_WEAK;
74f67560
DK
2885 else
2886 binding = elfcpp::STB_GLOBAL;
75f2446e 2887 }
89fc3421 2888 else if (symobj->pluginobj() != NULL)
2ea97941 2889 shndx = elfcpp::SHN_UNDEF;
75f2446e 2890 else if (in_shndx == elfcpp::SHN_UNDEF
d491d34e
ILT
2891 || (!is_ordinary
2892 && (in_shndx == elfcpp::SHN_ABS
8a5e3e08 2893 || Symbol::is_common_shndx(in_shndx))))
2ea97941 2894 shndx = in_shndx;
75f2446e
ILT
2895 else
2896 {
2897 Relobj* relobj = static_cast<Relobj*>(symobj);
ef9beddf 2898 Output_section* os = relobj->output_section(in_shndx);
ef15dade
ST
2899 if (this->is_section_folded(relobj, in_shndx))
2900 {
2901 // This global symbol must be written out even though
2902 // it is folded.
2903 // Get the os of the section it is folded onto.
2904 Section_id folded =
2905 this->icf_->get_folded_section(relobj, in_shndx);
2906 gold_assert(folded.first !=NULL);
2907 Relobj* folded_obj =
2908 reinterpret_cast<Relobj*>(folded.first);
2909 os = folded_obj->output_section(folded.second);
2910 gold_assert(os != NULL);
2911 }
75f2446e 2912 gold_assert(os != NULL);
2ea97941 2913 shndx = os->out_shndx();
88dd47ac 2914
2ea97941 2915 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e
ILT
2916 {
2917 if (sym_index != -1U)
2ea97941 2918 symtab_xindex->add(sym_index, shndx);
d491d34e 2919 if (dynsym_index != -1U)
2ea97941
ILT
2920 dynsym_xindex->add(dynsym_index, shndx);
2921 shndx = elfcpp::SHN_XINDEX;
d491d34e
ILT
2922 }
2923
88dd47ac
ILT
2924 // In object files symbol values are section
2925 // relative.
8851ecca 2926 if (parameters->options().relocatable())
88dd47ac 2927 sym_value -= os->address();
75f2446e 2928 }
ead1e424
ILT
2929 }
2930 }
2931 break;
2932
2933 case Symbol::IN_OUTPUT_DATA:
2ea97941
ILT
2934 shndx = sym->output_data()->out_shndx();
2935 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e
ILT
2936 {
2937 if (sym_index != -1U)
2ea97941 2938 symtab_xindex->add(sym_index, shndx);
d491d34e 2939 if (dynsym_index != -1U)
2ea97941
ILT
2940 dynsym_xindex->add(dynsym_index, shndx);
2941 shndx = elfcpp::SHN_XINDEX;
d491d34e 2942 }
ead1e424
ILT
2943 break;
2944
2945 case Symbol::IN_OUTPUT_SEGMENT:
2ea97941 2946 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
2947 break;
2948
f3e9c5c5 2949 case Symbol::IS_CONSTANT:
2ea97941 2950 shndx = elfcpp::SHN_ABS;
ead1e424
ILT
2951 break;
2952
f3e9c5c5 2953 case Symbol::IS_UNDEFINED:
2ea97941 2954 shndx = elfcpp::SHN_UNDEF;
f3e9c5c5
ILT
2955 break;
2956
ead1e424 2957 default:
a3ad94ed 2958 gold_unreachable();
ead1e424 2959 }
61ba1cf9 2960
16649710
ILT
2961 if (sym_index != -1U)
2962 {
55a93433
ILT
2963 sym_index -= first_global_index;
2964 gold_assert(sym_index < output_count);
2965 unsigned char* ps = psyms + (sym_index * sym_size);
2ea97941 2966 this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
ce279a62 2967 binding, sympool, ps);
16649710 2968 }
61ba1cf9 2969
16649710
ILT
2970 if (dynsym_index != -1U)
2971 {
2972 dynsym_index -= first_dynamic_global_index;
2973 gold_assert(dynsym_index < dynamic_count);
2974 unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
2ea97941 2975 this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
ce279a62 2976 binding, dynpool, pd);
16649710 2977 }
61ba1cf9
ILT
2978 }
2979
c06b7b0b 2980 of->write_output_view(this->offset_, oview_size, psyms);
16649710
ILT
2981 if (dynamic_view != NULL)
2982 of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
2983}
2984
2985// Write out the symbol SYM, in section SHNDX, to P. POOL is the
2986// strtab holding the name.
2987
2988template<int size, bool big_endian>
2989void
ab5c9e90
ILT
2990Symbol_table::sized_write_symbol(
2991 Sized_symbol<size>* sym,
2ea97941
ILT
2992 typename elfcpp::Elf_types<size>::Elf_Addr value,
2993 unsigned int shndx,
ce279a62 2994 elfcpp::STB binding,
ab5c9e90 2995 const Stringpool* pool,
7d1a9ebb 2996 unsigned char* p) const
16649710
ILT
2997{
2998 elfcpp::Sym_write<size, big_endian> osym(p);
6d1c4efb
ILT
2999 if (sym->version() == NULL || !parameters->options().relocatable())
3000 osym.put_st_name(pool->get_offset(sym->name()));
3001 else
3002 osym.put_st_name(pool->get_offset(sym->versioned_name()));
2ea97941 3003 osym.put_st_value(value);
58e54ac2 3004 // Use a symbol size of zero for undefined symbols from shared libraries.
2ea97941 3005 if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj())
58e54ac2
CD
3006 osym.put_st_size(0);
3007 else
3008 osym.put_st_size(sym->symsize());
53d7974c
L
3009 elfcpp::STT type = sym->type();
3010 // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
3011 if (type == elfcpp::STT_GNU_IFUNC
3012 && sym->is_from_dynobj())
3013 type = elfcpp::STT_FUNC;
55a93433
ILT
3014 // A version script may have overridden the default binding.
3015 if (sym->is_forced_local())
53d7974c 3016 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type));
55a93433 3017 else
ce279a62 3018 osym.put_st_info(elfcpp::elf_st_info(binding, type));
16649710 3019 osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
2ea97941 3020 osym.put_st_shndx(shndx);
61ba1cf9
ILT
3021}
3022
9a2d6984
ILT
3023// Check for unresolved symbols in shared libraries. This is
3024// controlled by the --allow-shlib-undefined option.
3025
3026// We only warn about libraries for which we have seen all the
3027// DT_NEEDED entries. We don't try to track down DT_NEEDED entries
3028// which were not seen in this link. If we didn't see a DT_NEEDED
3029// entry, we aren't going to be able to reliably report whether the
3030// symbol is undefined.
3031
fd9d194f
ILT
3032// We also don't warn about libraries found in a system library
3033// directory (e.g., /lib or /usr/lib); we assume that those libraries
3034// are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
3035// can have undefined references satisfied by ld-linux.so.
9a2d6984
ILT
3036
3037inline void
fd9d194f 3038Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const
9a2d6984 3039{
d491d34e 3040 bool dummy;
9a2d6984
ILT
3041 if (sym->source() == Symbol::FROM_OBJECT
3042 && sym->object()->is_dynamic()
d491d34e 3043 && sym->shndx(&dummy) == elfcpp::SHN_UNDEF
9a2d6984 3044 && sym->binding() != elfcpp::STB_WEAK
8851ecca
ILT
3045 && !parameters->options().allow_shlib_undefined()
3046 && !parameters->target().is_defined_by_abi(sym)
fd9d194f 3047 && !sym->object()->is_in_system_directory())
9a2d6984
ILT
3048 {
3049 // A very ugly cast.
3050 Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
3051 if (!dynobj->has_unknown_needed_entries())
f073bbf7 3052 gold_undefined_symbol(sym);
9a2d6984
ILT
3053 }
3054}
3055
a3ad94ed
ILT
3056// Write out a section symbol. Return the update offset.
3057
3058void
ca09d69a 3059Symbol_table::write_section_symbol(const Output_section* os,
d491d34e 3060 Output_symtab_xindex* symtab_xindex,
a3ad94ed
ILT
3061 Output_file* of,
3062 off_t offset) const
3063{
8851ecca 3064 switch (parameters->size_and_endianness())
a3ad94ed 3065 {
9025d29d 3066#ifdef HAVE_TARGET_32_LITTLE
8851ecca 3067 case Parameters::TARGET_32_LITTLE:
d491d34e
ILT
3068 this->sized_write_section_symbol<32, false>(os, symtab_xindex, of,
3069 offset);
8851ecca 3070 break;
9025d29d 3071#endif
8851ecca
ILT
3072#ifdef HAVE_TARGET_32_BIG
3073 case Parameters::TARGET_32_BIG:
d491d34e
ILT
3074 this->sized_write_section_symbol<32, true>(os, symtab_xindex, of,
3075 offset);
8851ecca 3076 break;
9025d29d 3077#endif
9025d29d 3078#ifdef HAVE_TARGET_64_LITTLE
8851ecca 3079 case Parameters::TARGET_64_LITTLE:
d491d34e
ILT
3080 this->sized_write_section_symbol<64, false>(os, symtab_xindex, of,
3081 offset);
8851ecca 3082 break;
9025d29d 3083#endif
8851ecca
ILT
3084#ifdef HAVE_TARGET_64_BIG
3085 case Parameters::TARGET_64_BIG:
d491d34e
ILT
3086 this->sized_write_section_symbol<64, true>(os, symtab_xindex, of,
3087 offset);
8851ecca
ILT
3088 break;
3089#endif
3090 default:
3091 gold_unreachable();
a3ad94ed 3092 }
a3ad94ed
ILT
3093}
3094
3095// Write out a section symbol, specialized for size and endianness.
3096
3097template<int size, bool big_endian>
3098void
3099Symbol_table::sized_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{
3104 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
3105
3106 unsigned char* pov = of->get_output_view(offset, sym_size);
3107
3108 elfcpp::Sym_write<size, big_endian> osym(pov);
3109 osym.put_st_name(0);
b4ecf66b
ILT
3110 if (parameters->options().relocatable())
3111 osym.put_st_value(0);
3112 else
3113 osym.put_st_value(os->address());
a3ad94ed
ILT
3114 osym.put_st_size(0);
3115 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
3116 elfcpp::STT_SECTION));
3117 osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
d491d34e 3118
2ea97941
ILT
3119 unsigned int shndx = os->out_shndx();
3120 if (shndx >= elfcpp::SHN_LORESERVE)
d491d34e 3121 {
2ea97941
ILT
3122 symtab_xindex->add(os->symtab_index(), shndx);
3123 shndx = elfcpp::SHN_XINDEX;
d491d34e 3124 }
2ea97941 3125 osym.put_st_shndx(shndx);
a3ad94ed
ILT
3126
3127 of->write_output_view(offset, sym_size, pov);
3128}
3129
abaa3995
ILT
3130// Print statistical information to stderr. This is used for --stats.
3131
3132void
3133Symbol_table::print_stats() const
3134{
3135#if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
3136 fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"),
3137 program_name, this->table_.size(), this->table_.bucket_count());
3138#else
3139 fprintf(stderr, _("%s: symbol table entries: %zu\n"),
3140 program_name, this->table_.size());
3141#endif
ad8f37d1 3142 this->namepool_.print_stats("symbol table stringpool");
abaa3995
ILT
3143}
3144
ff541f30
ILT
3145// We check for ODR violations by looking for symbols with the same
3146// name for which the debugging information reports that they were
71ff8986 3147// defined in disjoint source locations. When comparing the source
55382fb7
ILT
3148// location, we consider instances with the same base filename to be
3149// the same. This is because different object files/shared libraries
3150// can include the same header file using different paths, and
3151// different optimization settings can make the line number appear to
3152// be a couple lines off, and we don't want to report an ODR violation
3153// in those cases.
ff541f30
ILT
3154
3155// This struct is used to compare line information, as returned by
7bf1f802 3156// Dwarf_line_info::one_addr2line. It implements a < comparison
71ff8986 3157// operator used with std::sort.
ff541f30
ILT
3158
3159struct Odr_violation_compare
3160{
3161 bool
3162 operator()(const std::string& s1, const std::string& s2) const
3163 {
55382fb7 3164 // Inputs should be of the form "dirname/filename:linenum" where
71ff8986 3165 // "dirname/" is optional. We want to compare just the filename:linenum.
55382fb7 3166
71ff8986 3167 // Find the last '/' in each string.
55382fb7
ILT
3168 std::string::size_type s1begin = s1.rfind('/');
3169 std::string::size_type s2begin = s2.rfind('/');
55382fb7
ILT
3170 // If there was no '/' in a string, start at the beginning.
3171 if (s1begin == std::string::npos)
3172 s1begin = 0;
3173 if (s2begin == std::string::npos)
3174 s2begin = 0;
71ff8986
ILT
3175 return s1.compare(s1begin, std::string::npos,
3176 s2, s2begin, std::string::npos) < 0;
ff541f30
ILT
3177 }
3178};
3179
71ff8986
ILT
3180// Returns all of the lines attached to LOC, not just the one the
3181// instruction actually came from.
3182std::vector<std::string>
3183Symbol_table::linenos_from_loc(const Task* task,
3184 const Symbol_location& loc)
3185{
3186 // We need to lock the object in order to read it. This
3187 // means that we have to run in a singleton Task. If we
3188 // want to run this in a general Task for better
3189 // performance, we will need one Task for object, plus
3190 // appropriate locking to ensure that we don't conflict with
3191 // other uses of the object. Also note, one_addr2line is not
3192 // currently thread-safe.
3193 Task_lock_obj<Object> tl(task, loc.object);
3194
3195 std::vector<std::string> result;
3196 // 16 is the size of the object-cache that one_addr2line should use.
3197 std::string canonical_result = Dwarf_line_info::one_addr2line(
3198 loc.object, loc.shndx, loc.offset, 16, &result);
3199 if (!canonical_result.empty())
3200 result.push_back(canonical_result);
3201 return result;
3202}
3203
3204// OutputIterator that records if it was ever assigned to. This
3205// allows it to be used with std::set_intersection() to check for
3206// intersection rather than computing the intersection.
3207struct Check_intersection
3208{
3209 Check_intersection()
3210 : value_(false)
3211 {}
3212
3213 bool had_intersection() const
3214 { return this->value_; }
3215
3216 Check_intersection& operator++()
3217 { return *this; }
3218
3219 Check_intersection& operator*()
3220 { return *this; }
3221
3222 template<typename T>
3223 Check_intersection& operator=(const T&)
3224 {
3225 this->value_ = true;
3226 return *this;
3227 }
3228
3229 private:
3230 bool value_;
3231};
3232
70e654ba 3233// Check candidate_odr_violations_ to find symbols with the same name
71ff8986
ILT
3234// but apparently different definitions (different source-file/line-no
3235// for each line assigned to the first instruction).
70e654ba
ILT
3236
3237void
17a1d0a9
ILT
3238Symbol_table::detect_odr_violations(const Task* task,
3239 const char* output_file_name) const
70e654ba
ILT
3240{
3241 for (Odr_map::const_iterator it = candidate_odr_violations_.begin();
3242 it != candidate_odr_violations_.end();
3243 ++it)
3244 {
71ff8986
ILT
3245 const char* const symbol_name = it->first;
3246
3247 std::string first_object_name;
3248 std::vector<std::string> first_object_linenos;
3249
3250 Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3251 locs = it->second.begin();
3252 const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3253 locs_end = it->second.end();
3254 for (; locs != locs_end && first_object_linenos.empty(); ++locs)
70e654ba 3255 {
71ff8986
ILT
3256 // Save the line numbers from the first definition to
3257 // compare to the other definitions. Ideally, we'd compare
3258 // every definition to every other, but we don't want to
3259 // take O(N^2) time to do this. This shortcut may cause
3260 // false negatives that appear or disappear depending on the
3261 // link order, but it won't cause false positives.
3262 first_object_name = locs->object->name();
3263 first_object_linenos = this->linenos_from_loc(task, *locs);
70e654ba
ILT
3264 }
3265
71ff8986
ILT
3266 // Sort by Odr_violation_compare to make std::set_intersection work.
3267 std::sort(first_object_linenos.begin(), first_object_linenos.end(),
3268 Odr_violation_compare());
3269
3270 for (; locs != locs_end; ++locs)
70e654ba 3271 {
71ff8986
ILT
3272 std::vector<std::string> linenos =
3273 this->linenos_from_loc(task, *locs);
3274 // linenos will be empty if we couldn't parse the debug info.
3275 if (linenos.empty())
3276 continue;
3277 // Sort by Odr_violation_compare to make std::set_intersection work.
3278 std::sort(linenos.begin(), linenos.end(), Odr_violation_compare());
3279
3280 Check_intersection intersection_result =
3281 std::set_intersection(first_object_linenos.begin(),
3282 first_object_linenos.end(),
3283 linenos.begin(),
3284 linenos.end(),
3285 Check_intersection(),
3286 Odr_violation_compare());
3287 if (!intersection_result.had_intersection())
3288 {
3289 gold_warning(_("while linking %s: symbol '%s' defined in "
3290 "multiple places (possible ODR violation):"),
3291 output_file_name, demangle(symbol_name).c_str());
3292 // This only prints one location from each definition,
3293 // which may not be the location we expect to intersect
3294 // with another definition. We could print the whole
3295 // set of locations, but that seems too verbose.
3296 gold_assert(!first_object_linenos.empty());
3297 gold_assert(!linenos.empty());
3298 fprintf(stderr, _(" %s from %s\n"),
3299 first_object_linenos[0].c_str(),
3300 first_object_name.c_str());
3301 fprintf(stderr, _(" %s from %s\n"),
3302 linenos[0].c_str(),
3303 locs->object->name().c_str());
3304 // Only print one broken pair, to avoid needing to
3305 // compare against a list of the disjoint definition
3306 // locations we've found so far. (If we kept comparing
3307 // against just the first one, we'd get a lot of
3308 // redundant complaints about the second definition
3309 // location.)
3310 break;
3311 }
70e654ba
ILT
3312 }
3313 }
e4e5049b
CS
3314 // We only call one_addr2line() in this function, so we can clear its cache.
3315 Dwarf_line_info::clear_addr2line_cache();
70e654ba
ILT
3316}
3317
f6ce93d6
ILT
3318// Warnings functions.
3319
3320// Add a new warning.
3321
3322void
2ea97941 3323Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
cb295612 3324 const std::string& warning)
f6ce93d6 3325{
2ea97941
ILT
3326 name = symtab->canonicalize_name(name);
3327 this->warnings_[name].set(obj, warning);
f6ce93d6
ILT
3328}
3329
3330// Look through the warnings and mark the symbols for which we should
3331// warn. This is called during Layout::finalize when we know the
3332// sources for all the symbols.
3333
3334void
cb295612 3335Warnings::note_warnings(Symbol_table* symtab)
f6ce93d6
ILT
3336{
3337 for (Warning_table::iterator p = this->warnings_.begin();
3338 p != this->warnings_.end();
3339 ++p)
3340 {
3341 Symbol* sym = symtab->lookup(p->first, NULL);
3342 if (sym != NULL
3343 && sym->source() == Symbol::FROM_OBJECT
3344 && sym->object() == p->second.object)
cb295612 3345 sym->set_has_warning();
f6ce93d6
ILT
3346 }
3347}
3348
3349// Issue a warning. This is called when we see a relocation against a
3350// symbol for which has a warning.
3351
75f2446e 3352template<int size, bool big_endian>
f6ce93d6 3353void
75f2446e
ILT
3354Warnings::issue_warning(const Symbol* sym,
3355 const Relocate_info<size, big_endian>* relinfo,
3356 size_t relnum, off_t reloffset) const
f6ce93d6 3357{
a3ad94ed 3358 gold_assert(sym->has_warning());
9d3b0698
ILT
3359
3360 // We don't want to issue a warning for a relocation against the
3361 // symbol in the same object file in which the symbol is defined.
3362 if (sym->object() == relinfo->object)
3363 return;
3364
f6ce93d6 3365 Warning_table::const_iterator p = this->warnings_.find(sym->name());
a3ad94ed 3366 gold_assert(p != this->warnings_.end());
75f2446e
ILT
3367 gold_warning_at_location(relinfo, relnum, reloffset,
3368 "%s", p->second.text.c_str());
f6ce93d6
ILT
3369}
3370
14bfc3f5
ILT
3371// Instantiate the templates we need. We could use the configure
3372// script to restrict this to only the ones needed for implemented
3373// targets.
3374
c7912668
ILT
3375#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3376template
3377void
3378Sized_symbol<32>::allocate_common(Output_data*, Value_type);
3379#endif
3380
3381#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3382template
3383void
3384Sized_symbol<64>::allocate_common(Output_data*, Value_type);
3385#endif
3386
193a53d9 3387#ifdef HAVE_TARGET_32_LITTLE
14bfc3f5
ILT
3388template
3389void
193a53d9 3390Symbol_table::add_from_relobj<32, false>(
6fa2a40b 3391 Sized_relobj_file<32, false>* relobj,
f6ce93d6 3392 const unsigned char* syms,
14bfc3f5 3393 size_t count,
d491d34e 3394 size_t symndx_offset,
14bfc3f5
ILT
3395 const char* sym_names,
3396 size_t sym_name_size,
6fa2a40b 3397 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3398 size_t* defined);
193a53d9 3399#endif
14bfc3f5 3400
193a53d9 3401#ifdef HAVE_TARGET_32_BIG
14bfc3f5
ILT
3402template
3403void
193a53d9 3404Symbol_table::add_from_relobj<32, true>(
6fa2a40b 3405 Sized_relobj_file<32, true>* relobj,
f6ce93d6 3406 const unsigned char* syms,
14bfc3f5 3407 size_t count,
d491d34e 3408 size_t symndx_offset,
14bfc3f5
ILT
3409 const char* sym_names,
3410 size_t sym_name_size,
6fa2a40b 3411 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3412 size_t* defined);
193a53d9 3413#endif
14bfc3f5 3414
193a53d9 3415#ifdef HAVE_TARGET_64_LITTLE
14bfc3f5
ILT
3416template
3417void
193a53d9 3418Symbol_table::add_from_relobj<64, false>(
6fa2a40b 3419 Sized_relobj_file<64, false>* relobj,
f6ce93d6 3420 const unsigned char* syms,
14bfc3f5 3421 size_t count,
d491d34e 3422 size_t symndx_offset,
14bfc3f5
ILT
3423 const char* sym_names,
3424 size_t sym_name_size,
6fa2a40b 3425 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3426 size_t* defined);
193a53d9 3427#endif
14bfc3f5 3428
193a53d9 3429#ifdef HAVE_TARGET_64_BIG
14bfc3f5
ILT
3430template
3431void
193a53d9 3432Symbol_table::add_from_relobj<64, true>(
6fa2a40b 3433 Sized_relobj_file<64, true>* 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<64, true>::Symbols* sympointers,
92de84a6 3440 size_t* defined);
193a53d9 3441#endif
14bfc3f5 3442
89fc3421
CC
3443#ifdef HAVE_TARGET_32_LITTLE
3444template
3445Symbol*
3446Symbol_table::add_from_pluginobj<32, false>(
3447 Sized_pluginobj<32, false>* obj,
3448 const char* name,
3449 const char* ver,
3450 elfcpp::Sym<32, false>* sym);
3451#endif
3452
3453#ifdef HAVE_TARGET_32_BIG
3454template
3455Symbol*
3456Symbol_table::add_from_pluginobj<32, true>(
3457 Sized_pluginobj<32, true>* obj,
3458 const char* name,
3459 const char* ver,
3460 elfcpp::Sym<32, true>* sym);
3461#endif
3462
3463#ifdef HAVE_TARGET_64_LITTLE
3464template
3465Symbol*
3466Symbol_table::add_from_pluginobj<64, false>(
3467 Sized_pluginobj<64, false>* obj,
3468 const char* name,
3469 const char* ver,
3470 elfcpp::Sym<64, false>* sym);
3471#endif
3472
3473#ifdef HAVE_TARGET_64_BIG
3474template
3475Symbol*
3476Symbol_table::add_from_pluginobj<64, true>(
3477 Sized_pluginobj<64, true>* obj,
3478 const char* name,
3479 const char* ver,
3480 elfcpp::Sym<64, true>* sym);
3481#endif
3482
193a53d9 3483#ifdef HAVE_TARGET_32_LITTLE
dbe717ef
ILT
3484template
3485void
193a53d9
ILT
3486Symbol_table::add_from_dynobj<32, false>(
3487 Sized_dynobj<32, false>* dynobj,
dbe717ef
ILT
3488 const unsigned char* syms,
3489 size_t count,
3490 const char* sym_names,
3491 size_t sym_name_size,
3492 const unsigned char* versym,
3493 size_t versym_size,
92de84a6 3494 const std::vector<const char*>* version_map,
6fa2a40b 3495 Sized_relobj_file<32, false>::Symbols* sympointers,
92de84a6 3496 size_t* defined);
193a53d9 3497#endif
dbe717ef 3498
193a53d9 3499#ifdef HAVE_TARGET_32_BIG
dbe717ef
ILT
3500template
3501void
193a53d9
ILT
3502Symbol_table::add_from_dynobj<32, true>(
3503 Sized_dynobj<32, true>* dynobj,
dbe717ef
ILT
3504 const unsigned char* syms,
3505 size_t count,
3506 const char* sym_names,
3507 size_t sym_name_size,
3508 const unsigned char* versym,
3509 size_t versym_size,
92de84a6 3510 const std::vector<const char*>* version_map,
6fa2a40b 3511 Sized_relobj_file<32, true>::Symbols* sympointers,
92de84a6 3512 size_t* defined);
193a53d9 3513#endif
dbe717ef 3514
193a53d9 3515#ifdef HAVE_TARGET_64_LITTLE
dbe717ef
ILT
3516template
3517void
193a53d9
ILT
3518Symbol_table::add_from_dynobj<64, false>(
3519 Sized_dynobj<64, false>* dynobj,
dbe717ef
ILT
3520 const unsigned char* syms,
3521 size_t count,
3522 const char* sym_names,
3523 size_t sym_name_size,
3524 const unsigned char* versym,
3525 size_t versym_size,
92de84a6 3526 const std::vector<const char*>* version_map,
6fa2a40b 3527 Sized_relobj_file<64, false>::Symbols* sympointers,
92de84a6 3528 size_t* defined);
193a53d9 3529#endif
dbe717ef 3530
193a53d9 3531#ifdef HAVE_TARGET_64_BIG
dbe717ef
ILT
3532template
3533void
193a53d9
ILT
3534Symbol_table::add_from_dynobj<64, true>(
3535 Sized_dynobj<64, true>* dynobj,
dbe717ef
ILT
3536 const unsigned char* syms,
3537 size_t count,
3538 const char* sym_names,
3539 size_t sym_name_size,
3540 const unsigned char* versym,
3541 size_t versym_size,
92de84a6 3542 const std::vector<const char*>* version_map,
6fa2a40b 3543 Sized_relobj_file<64, true>::Symbols* sympointers,
92de84a6 3544 size_t* defined);
193a53d9 3545#endif
dbe717ef 3546
cdc29364
CC
3547#ifdef HAVE_TARGET_32_LITTLE
3548template
26d3c67d 3549Sized_symbol<32>*
cdc29364
CC
3550Symbol_table::add_from_incrobj(
3551 Object* obj,
3552 const char* name,
3553 const char* ver,
3554 elfcpp::Sym<32, false>* sym);
3555#endif
3556
3557#ifdef HAVE_TARGET_32_BIG
3558template
26d3c67d 3559Sized_symbol<32>*
cdc29364
CC
3560Symbol_table::add_from_incrobj(
3561 Object* obj,
3562 const char* name,
3563 const char* ver,
3564 elfcpp::Sym<32, true>* sym);
3565#endif
3566
3567#ifdef HAVE_TARGET_64_LITTLE
3568template
26d3c67d 3569Sized_symbol<64>*
cdc29364
CC
3570Symbol_table::add_from_incrobj(
3571 Object* obj,
3572 const char* name,
3573 const char* ver,
3574 elfcpp::Sym<64, false>* sym);
3575#endif
3576
3577#ifdef HAVE_TARGET_64_BIG
3578template
26d3c67d 3579Sized_symbol<64>*
cdc29364
CC
3580Symbol_table::add_from_incrobj(
3581 Object* obj,
3582 const char* name,
3583 const char* ver,
3584 elfcpp::Sym<64, true>* sym);
3585#endif
3586
46fe1623
ILT
3587#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3588template
3589void
fe8718a4 3590Symbol_table::define_with_copy_reloc<32>(
fe8718a4
ILT
3591 Sized_symbol<32>* sym,
3592 Output_data* posd,
2ea97941 3593 elfcpp::Elf_types<32>::Elf_Addr value);
46fe1623
ILT
3594#endif
3595
3596#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3597template
3598void
fe8718a4 3599Symbol_table::define_with_copy_reloc<64>(
fe8718a4
ILT
3600 Sized_symbol<64>* sym,
3601 Output_data* posd,
2ea97941 3602 elfcpp::Elf_types<64>::Elf_Addr value);
46fe1623
ILT
3603#endif
3604
75f2446e
ILT
3605#ifdef HAVE_TARGET_32_LITTLE
3606template
3607void
3608Warnings::issue_warning<32, false>(const Symbol* sym,
3609 const Relocate_info<32, false>* relinfo,
3610 size_t relnum, off_t reloffset) const;
3611#endif
3612
3613#ifdef HAVE_TARGET_32_BIG
3614template
3615void
3616Warnings::issue_warning<32, true>(const Symbol* sym,
3617 const Relocate_info<32, true>* relinfo,
3618 size_t relnum, off_t reloffset) const;
3619#endif
3620
3621#ifdef HAVE_TARGET_64_LITTLE
3622template
3623void
3624Warnings::issue_warning<64, false>(const Symbol* sym,
3625 const Relocate_info<64, false>* relinfo,
3626 size_t relnum, off_t reloffset) const;
3627#endif
3628
3629#ifdef HAVE_TARGET_64_BIG
3630template
3631void
3632Warnings::issue_warning<64, true>(const Symbol* sym,
3633 const Relocate_info<64, true>* relinfo,
3634 size_t relnum, off_t reloffset) const;
3635#endif
3636
14bfc3f5 3637} // End namespace gold.