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bae7f79e ILT |
1 | // symtab.h -- the gold symbol table -*- C++ -*- |
2 | ||
6cb15b7f ILT |
3 | // Copyright 2006, 2007 Free Software Foundation, Inc. |
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 | ||
bae7f79e ILT |
23 | // Symbol_table |
24 | // The symbol table. | |
25 | ||
bae7f79e ILT |
26 | #include <string> |
27 | #include <utility> | |
ead1e424 | 28 | #include <vector> |
bae7f79e ILT |
29 | |
30 | #include "elfcpp.h" | |
7e1edb90 | 31 | #include "parameters.h" |
14bfc3f5 | 32 | #include "stringpool.h" |
f6ce93d6 | 33 | #include "object.h" |
bae7f79e ILT |
34 | |
35 | #ifndef GOLD_SYMTAB_H | |
36 | #define GOLD_SYMTAB_H | |
37 | ||
38 | namespace gold | |
39 | { | |
40 | ||
14bfc3f5 | 41 | class Object; |
f6ce93d6 | 42 | class Relobj; |
dbe717ef ILT |
43 | template<int size, bool big_endian> |
44 | class Sized_relobj; | |
f6ce93d6 | 45 | class Dynobj; |
dbe717ef ILT |
46 | template<int size, bool big_endian> |
47 | class Sized_dynobj; | |
14b31740 | 48 | class Versions; |
ead1e424 | 49 | class Output_data; |
a3ad94ed | 50 | class Output_section; |
ead1e424 | 51 | class Output_segment; |
61ba1cf9 ILT |
52 | class Output_file; |
53 | class Target; | |
14bfc3f5 | 54 | |
14bfc3f5 ILT |
55 | // The base class of an entry in the symbol table. The symbol table |
56 | // can have a lot of entries, so we don't want this class to big. | |
57 | // Size dependent fields can be found in the template class | |
58 | // Sized_symbol. Targets may support their own derived classes. | |
bae7f79e | 59 | |
bae7f79e ILT |
60 | class Symbol |
61 | { | |
62 | public: | |
ead1e424 ILT |
63 | // Because we want the class to be small, we don't use any virtual |
64 | // functions. But because symbols can be defined in different | |
65 | // places, we need to classify them. This enum is the different | |
66 | // sources of symbols we support. | |
67 | enum Source | |
68 | { | |
f6ce93d6 ILT |
69 | // Symbol defined in a relocatable or dynamic input file--this is |
70 | // the most common case. | |
ead1e424 ILT |
71 | FROM_OBJECT, |
72 | // Symbol defined in an Output_data, a special section created by | |
73 | // the target. | |
74 | IN_OUTPUT_DATA, | |
75 | // Symbol defined in an Output_segment, with no associated | |
76 | // section. | |
77 | IN_OUTPUT_SEGMENT, | |
78 | // Symbol value is constant. | |
79 | CONSTANT | |
80 | }; | |
81 | ||
82 | // When the source is IN_OUTPUT_SEGMENT, we need to describe what | |
83 | // the offset means. | |
84 | enum Segment_offset_base | |
85 | { | |
86 | // From the start of the segment. | |
87 | SEGMENT_START, | |
88 | // From the end of the segment. | |
89 | SEGMENT_END, | |
90 | // From the filesz of the segment--i.e., after the loaded bytes | |
91 | // but before the bytes which are allocated but zeroed. | |
92 | SEGMENT_BSS | |
93 | }; | |
94 | ||
14bfc3f5 ILT |
95 | // Return the symbol name. |
96 | const char* | |
97 | name() const | |
98 | { return this->name_; } | |
99 | ||
100 | // Return the symbol version. This will return NULL for an | |
101 | // unversioned symbol. | |
102 | const char* | |
103 | version() const | |
104 | { return this->version_; } | |
105 | ||
ead1e424 ILT |
106 | // Return the symbol source. |
107 | Source | |
108 | source() const | |
109 | { return this->source_; } | |
110 | ||
14bfc3f5 ILT |
111 | // Return the object with which this symbol is associated. |
112 | Object* | |
113 | object() const | |
ead1e424 | 114 | { |
a3ad94ed | 115 | gold_assert(this->source_ == FROM_OBJECT); |
ead1e424 ILT |
116 | return this->u_.from_object.object; |
117 | } | |
118 | ||
f6ce93d6 ILT |
119 | // Return the index of the section in the input relocatable or |
120 | // dynamic object file. | |
ead1e424 | 121 | unsigned int |
16649710 | 122 | shndx() const |
ead1e424 | 123 | { |
a3ad94ed | 124 | gold_assert(this->source_ == FROM_OBJECT); |
16649710 | 125 | return this->u_.from_object.shndx; |
ead1e424 ILT |
126 | } |
127 | ||
128 | // Return the output data section with which this symbol is | |
129 | // associated, if the symbol was specially defined with respect to | |
130 | // an output data section. | |
131 | Output_data* | |
132 | output_data() const | |
133 | { | |
a3ad94ed | 134 | gold_assert(this->source_ == IN_OUTPUT_DATA); |
ead1e424 ILT |
135 | return this->u_.in_output_data.output_data; |
136 | } | |
137 | ||
138 | // If this symbol was defined with respect to an output data | |
139 | // section, return whether the value is an offset from end. | |
140 | bool | |
141 | offset_is_from_end() const | |
142 | { | |
a3ad94ed | 143 | gold_assert(this->source_ == IN_OUTPUT_DATA); |
ead1e424 ILT |
144 | return this->u_.in_output_data.offset_is_from_end; |
145 | } | |
146 | ||
147 | // Return the output segment with which this symbol is associated, | |
148 | // if the symbol was specially defined with respect to an output | |
149 | // segment. | |
150 | Output_segment* | |
151 | output_segment() const | |
152 | { | |
a3ad94ed | 153 | gold_assert(this->source_ == IN_OUTPUT_SEGMENT); |
ead1e424 ILT |
154 | return this->u_.in_output_segment.output_segment; |
155 | } | |
156 | ||
157 | // If this symbol was defined with respect to an output segment, | |
158 | // return the offset base. | |
159 | Segment_offset_base | |
160 | offset_base() const | |
161 | { | |
a3ad94ed | 162 | gold_assert(this->source_ == IN_OUTPUT_SEGMENT); |
ead1e424 ILT |
163 | return this->u_.in_output_segment.offset_base; |
164 | } | |
14bfc3f5 ILT |
165 | |
166 | // Return the symbol binding. | |
167 | elfcpp::STB | |
168 | binding() const | |
169 | { return this->binding_; } | |
170 | ||
1564db8d ILT |
171 | // Return the symbol type. |
172 | elfcpp::STT | |
173 | type() const | |
174 | { return this->type_; } | |
175 | ||
176 | // Return the symbol visibility. | |
177 | elfcpp::STV | |
178 | visibility() const | |
179 | { return this->visibility_; } | |
180 | ||
181 | // Return the non-visibility part of the st_other field. | |
182 | unsigned char | |
ead1e424 ILT |
183 | nonvis() const |
184 | { return this->nonvis_; } | |
14bfc3f5 | 185 | |
1564db8d ILT |
186 | // Return whether this symbol is a forwarder. This will never be |
187 | // true of a symbol found in the hash table, but may be true of | |
188 | // symbol pointers attached to object files. | |
189 | bool | |
190 | is_forwarder() const | |
191 | { return this->is_forwarder_; } | |
192 | ||
193 | // Mark this symbol as a forwarder. | |
194 | void | |
195 | set_forwarder() | |
196 | { this->is_forwarder_ = true; } | |
197 | ||
c06b7b0b ILT |
198 | // Return whether this symbol needs an entry in the dynamic symbol |
199 | // table. | |
200 | bool | |
201 | needs_dynsym_entry() const | |
429c1569 ILT |
202 | { |
203 | return (this->needs_dynsym_entry_ | |
204 | || (this->in_reg() && this->in_dyn())); | |
205 | } | |
c06b7b0b ILT |
206 | |
207 | // Mark this symbol as needing an entry in the dynamic symbol table. | |
208 | void | |
209 | set_needs_dynsym_entry() | |
210 | { this->needs_dynsym_entry_ = true; } | |
211 | ||
008db82e ILT |
212 | // Return whether this symbol has been seen in a regular object. |
213 | bool | |
214 | in_reg() const | |
215 | { return this->in_reg_; } | |
216 | ||
217 | // Mark this symbol as having been seen in a regular object. | |
218 | void | |
219 | set_in_reg() | |
220 | { this->in_reg_ = true; } | |
221 | ||
1ebd95fd ILT |
222 | // Return whether this symbol has been seen in a dynamic object. |
223 | bool | |
224 | in_dyn() const | |
225 | { return this->in_dyn_; } | |
226 | ||
f6ce93d6 | 227 | // Mark this symbol as having been seen in a dynamic object. |
1564db8d ILT |
228 | void |
229 | set_in_dyn() | |
230 | { this->in_dyn_ = true; } | |
231 | ||
c06b7b0b ILT |
232 | // Return the index of this symbol in the output file symbol table. |
233 | // A value of -1U means that this symbol is not going into the | |
234 | // output file. This starts out as zero, and is set to a non-zero | |
235 | // value by Symbol_table::finalize. It is an error to ask for the | |
236 | // symbol table index before it has been set. | |
237 | unsigned int | |
238 | symtab_index() const | |
239 | { | |
a3ad94ed | 240 | gold_assert(this->symtab_index_ != 0); |
c06b7b0b ILT |
241 | return this->symtab_index_; |
242 | } | |
243 | ||
244 | // Set the index of the symbol in the output file symbol table. | |
245 | void | |
246 | set_symtab_index(unsigned int index) | |
247 | { | |
a3ad94ed | 248 | gold_assert(index != 0); |
c06b7b0b ILT |
249 | this->symtab_index_ = index; |
250 | } | |
251 | ||
a3ad94ed ILT |
252 | // Return whether this symbol already has an index in the output |
253 | // file symbol table. | |
254 | bool | |
255 | has_symtab_index() const | |
256 | { return this->symtab_index_ != 0; } | |
257 | ||
c06b7b0b ILT |
258 | // Return the index of this symbol in the dynamic symbol table. A |
259 | // value of -1U means that this symbol is not going into the dynamic | |
260 | // symbol table. This starts out as zero, and is set to a non-zero | |
261 | // during Layout::finalize. It is an error to ask for the dynamic | |
262 | // symbol table index before it has been set. | |
263 | unsigned int | |
264 | dynsym_index() const | |
265 | { | |
a3ad94ed | 266 | gold_assert(this->dynsym_index_ != 0); |
c06b7b0b ILT |
267 | return this->dynsym_index_; |
268 | } | |
269 | ||
270 | // Set the index of the symbol in the dynamic symbol table. | |
271 | void | |
272 | set_dynsym_index(unsigned int index) | |
273 | { | |
a3ad94ed | 274 | gold_assert(index != 0); |
c06b7b0b ILT |
275 | this->dynsym_index_ = index; |
276 | } | |
277 | ||
16649710 ILT |
278 | // Return whether this symbol already has an index in the dynamic |
279 | // symbol table. | |
280 | bool | |
281 | has_dynsym_index() const | |
282 | { return this->dynsym_index_ != 0; } | |
283 | ||
ead1e424 | 284 | // Return whether this symbol has an entry in the GOT section. |
92e059d8 | 285 | bool |
ead1e424 ILT |
286 | has_got_offset() const |
287 | { return this->has_got_offset_; } | |
288 | ||
289 | // Return the offset into the GOT section of this symbol. | |
290 | unsigned int | |
291 | got_offset() const | |
292 | { | |
a3ad94ed | 293 | gold_assert(this->has_got_offset()); |
ead1e424 ILT |
294 | return this->got_offset_; |
295 | } | |
296 | ||
297 | // Set the GOT offset of this symbol. | |
298 | void | |
299 | set_got_offset(unsigned int got_offset) | |
300 | { | |
301 | this->has_got_offset_ = true; | |
302 | this->got_offset_ = got_offset; | |
303 | } | |
304 | ||
a3ad94ed | 305 | // Return whether this symbol has an entry in the PLT section. |
ead1e424 | 306 | bool |
a3ad94ed ILT |
307 | has_plt_offset() const |
308 | { return this->has_plt_offset_; } | |
309 | ||
310 | // Return the offset into the PLT section of this symbol. | |
311 | unsigned int | |
312 | plt_offset() const | |
313 | { | |
314 | gold_assert(this->has_plt_offset()); | |
315 | return this->plt_offset_; | |
316 | } | |
317 | ||
318 | // Set the PLT offset of this symbol. | |
319 | void | |
320 | set_plt_offset(unsigned int plt_offset) | |
321 | { | |
322 | this->has_plt_offset_ = true; | |
323 | this->plt_offset_ = plt_offset; | |
324 | } | |
325 | ||
326 | // Return true if the final value of this symbol is known at link | |
327 | // time. | |
328 | bool | |
7e1edb90 | 329 | final_value_is_known() const |
a3ad94ed | 330 | { |
7e1edb90 | 331 | if (parameters->output_is_shared()) |
a3ad94ed ILT |
332 | return false; |
333 | return this->source_ != FROM_OBJECT || !this->object()->is_dynamic(); | |
334 | } | |
ead1e424 | 335 | |
f6ce93d6 ILT |
336 | // Return whether this is a defined symbol (not undefined or |
337 | // common). | |
338 | bool | |
339 | is_defined() const | |
340 | { | |
341 | return (this->source_ != FROM_OBJECT | |
16649710 ILT |
342 | || (this->shndx() != elfcpp::SHN_UNDEF |
343 | && this->shndx() != elfcpp::SHN_COMMON)); | |
a3ad94ed ILT |
344 | } |
345 | ||
14b31740 | 346 | // Return true if this symbol is from a dynamic object. |
a3ad94ed | 347 | bool |
14b31740 | 348 | is_from_dynobj() const |
a3ad94ed | 349 | { |
14b31740 | 350 | return this->source_ == FROM_OBJECT && this->object()->is_dynamic(); |
f6ce93d6 ILT |
351 | } |
352 | ||
ead1e424 ILT |
353 | // Return whether this is an undefined symbol. |
354 | bool | |
355 | is_undefined() const | |
356 | { | |
16649710 | 357 | return this->source_ == FROM_OBJECT && this->shndx() == elfcpp::SHN_UNDEF; |
ead1e424 ILT |
358 | } |
359 | ||
360 | // Return whether this is a common symbol. | |
361 | bool | |
362 | is_common() const | |
363 | { | |
f6ce93d6 | 364 | return (this->source_ == FROM_OBJECT |
16649710 | 365 | && (this->shndx() == elfcpp::SHN_COMMON |
f6ce93d6 | 366 | || this->type_ == elfcpp::STT_COMMON)); |
ead1e424 | 367 | } |
92e059d8 | 368 | |
a6badf5a ILT |
369 | // Return whether this symbol can be seen outside this object. |
370 | bool | |
371 | is_externally_visible() const | |
372 | { | |
373 | return (this->visibility_ == elfcpp::STV_DEFAULT | |
374 | || this->visibility_ == elfcpp::STV_PROTECTED); | |
375 | } | |
376 | ||
f6ce93d6 ILT |
377 | // Return whether there should be a warning for references to this |
378 | // symbol. | |
379 | bool | |
380 | has_warning() const | |
381 | { return this->has_warning_; } | |
382 | ||
383 | // Mark this symbol as having a warning. | |
384 | void | |
385 | set_has_warning() | |
386 | { this->has_warning_ = true; } | |
387 | ||
14bfc3f5 ILT |
388 | protected: |
389 | // Instances of this class should always be created at a specific | |
390 | // size. | |
391 | Symbol() | |
f6ce93d6 | 392 | { memset(this, 0, sizeof *this); } |
14bfc3f5 | 393 | |
ead1e424 ILT |
394 | // Initialize the general fields. |
395 | void | |
396 | init_fields(const char* name, const char* version, | |
397 | elfcpp::STT type, elfcpp::STB binding, | |
398 | elfcpp::STV visibility, unsigned char nonvis); | |
399 | ||
14bfc3f5 ILT |
400 | // Initialize fields from an ELF symbol in OBJECT. |
401 | template<int size, bool big_endian> | |
402 | void | |
403 | init_base(const char *name, const char* version, Object* object, | |
404 | const elfcpp::Sym<size, big_endian>&); | |
bae7f79e | 405 | |
ead1e424 ILT |
406 | // Initialize fields for an Output_data. |
407 | void | |
408 | init_base(const char* name, Output_data*, elfcpp::STT, elfcpp::STB, | |
409 | elfcpp::STV, unsigned char nonvis, bool offset_is_from_end); | |
410 | ||
411 | // Initialize fields for an Output_segment. | |
412 | void | |
413 | init_base(const char* name, Output_segment* os, elfcpp::STT type, | |
414 | elfcpp::STB binding, elfcpp::STV visibility, | |
415 | unsigned char nonvis, Segment_offset_base offset_base); | |
416 | ||
417 | // Initialize fields for a constant. | |
418 | void | |
419 | init_base(const char* name, elfcpp::STT type, elfcpp::STB binding, | |
420 | elfcpp::STV visibility, unsigned char nonvis); | |
421 | ||
1564db8d ILT |
422 | // Override existing symbol. |
423 | template<int size, bool big_endian> | |
424 | void | |
14b31740 ILT |
425 | override_base(const elfcpp::Sym<size, big_endian>&, Object* object, |
426 | const char* version); | |
1564db8d | 427 | |
86f2e683 ILT |
428 | // Override existing symbol with a special symbol. |
429 | void | |
430 | override_base_with_special(const Symbol* from); | |
431 | ||
bae7f79e | 432 | private: |
14bfc3f5 ILT |
433 | Symbol(const Symbol&); |
434 | Symbol& operator=(const Symbol&); | |
435 | ||
436 | // Symbol name (expected to point into a Stringpool). | |
437 | const char* name_; | |
438 | // Symbol version (expected to point into a Stringpool). This may | |
439 | // be NULL. | |
bae7f79e | 440 | const char* version_; |
ead1e424 ILT |
441 | |
442 | union | |
443 | { | |
444 | // This struct is used if SOURCE_ == FROM_OBJECT. | |
445 | struct | |
446 | { | |
447 | // Object in which symbol is defined, or in which it was first | |
448 | // seen. | |
449 | Object* object; | |
450 | // Section number in object_ in which symbol is defined. | |
16649710 | 451 | unsigned int shndx; |
ead1e424 ILT |
452 | } from_object; |
453 | ||
454 | // This struct is used if SOURCE_ == IN_OUTPUT_DATA. | |
455 | struct | |
456 | { | |
457 | // Output_data in which symbol is defined. Before | |
458 | // Layout::finalize the symbol's value is an offset within the | |
459 | // Output_data. | |
460 | Output_data* output_data; | |
461 | // True if the offset is from the end, false if the offset is | |
462 | // from the beginning. | |
463 | bool offset_is_from_end; | |
464 | } in_output_data; | |
465 | ||
466 | // This struct is used if SOURCE_ == IN_OUTPUT_SEGMENT. | |
467 | struct | |
468 | { | |
469 | // Output_segment in which the symbol is defined. Before | |
470 | // Layout::finalize the symbol's value is an offset. | |
471 | Output_segment* output_segment; | |
472 | // The base to use for the offset before Layout::finalize. | |
473 | Segment_offset_base offset_base; | |
474 | } in_output_segment; | |
475 | } u_; | |
476 | ||
c06b7b0b ILT |
477 | // The index of this symbol in the output file. If the symbol is |
478 | // not going into the output file, this value is -1U. This field | |
479 | // starts as always holding zero. It is set to a non-zero value by | |
480 | // Symbol_table::finalize. | |
481 | unsigned int symtab_index_; | |
482 | ||
483 | // The index of this symbol in the dynamic symbol table. If the | |
484 | // symbol is not going into the dynamic symbol table, this value is | |
485 | // -1U. This field starts as always holding zero. It is set to a | |
486 | // non-zero value during Layout::finalize. | |
487 | unsigned int dynsym_index_; | |
488 | ||
ead1e424 | 489 | // If this symbol has an entry in the GOT section (has_got_offset_ |
c06b7b0b | 490 | // is true), this is the offset from the start of the GOT section. |
ead1e424 | 491 | unsigned int got_offset_; |
c06b7b0b | 492 | |
a3ad94ed ILT |
493 | // If this symbol has an entry in the PLT section (has_plt_offset_ |
494 | // is true), then this is the offset from the start of the PLT | |
495 | // section. | |
496 | unsigned int plt_offset_; | |
497 | ||
14bfc3f5 | 498 | // Symbol type. |
bae7f79e | 499 | elfcpp::STT type_ : 4; |
14bfc3f5 | 500 | // Symbol binding. |
bae7f79e | 501 | elfcpp::STB binding_ : 4; |
14bfc3f5 ILT |
502 | // Symbol visibility. |
503 | elfcpp::STV visibility_ : 2; | |
504 | // Rest of symbol st_other field. | |
ead1e424 ILT |
505 | unsigned int nonvis_ : 6; |
506 | // The type of symbol. | |
f6ce93d6 | 507 | Source source_ : 3; |
14bfc3f5 ILT |
508 | // True if this symbol always requires special target-specific |
509 | // handling. | |
ead1e424 | 510 | bool is_target_special_ : 1; |
14bfc3f5 | 511 | // True if this is the default version of the symbol. |
1564db8d | 512 | bool is_def_ : 1; |
14bfc3f5 ILT |
513 | // True if this symbol really forwards to another symbol. This is |
514 | // used when we discover after the fact that two different entries | |
515 | // in the hash table really refer to the same symbol. This will | |
516 | // never be set for a symbol found in the hash table, but may be set | |
517 | // for a symbol found in the list of symbols attached to an Object. | |
518 | // It forwards to the symbol found in the forwarders_ map of | |
519 | // Symbol_table. | |
1564db8d | 520 | bool is_forwarder_ : 1; |
c06b7b0b ILT |
521 | // True if this symbol needs to be in the dynamic symbol table. |
522 | bool needs_dynsym_entry_ : 1; | |
008db82e ILT |
523 | // True if we've seen this symbol in a regular object. |
524 | bool in_reg_ : 1; | |
1564db8d ILT |
525 | // True if we've seen this symbol in a dynamic object. |
526 | bool in_dyn_ : 1; | |
ead1e424 ILT |
527 | // True if the symbol has an entry in the GOT section. |
528 | bool has_got_offset_ : 1; | |
a3ad94ed ILT |
529 | // True if the symbol has an entry in the PLT section. |
530 | bool has_plt_offset_ : 1; | |
f6ce93d6 ILT |
531 | // True if there is a warning for this symbol. |
532 | bool has_warning_ : 1; | |
bae7f79e ILT |
533 | }; |
534 | ||
14bfc3f5 ILT |
535 | // The parts of a symbol which are size specific. Using a template |
536 | // derived class like this helps us use less space on a 32-bit system. | |
bae7f79e ILT |
537 | |
538 | template<int size> | |
14bfc3f5 ILT |
539 | class Sized_symbol : public Symbol |
540 | { | |
541 | public: | |
1564db8d ILT |
542 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Value_type; |
543 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Size_type; | |
544 | ||
14bfc3f5 ILT |
545 | Sized_symbol() |
546 | { } | |
547 | ||
548 | // Initialize fields from an ELF symbol in OBJECT. | |
549 | template<bool big_endian> | |
550 | void | |
551 | init(const char *name, const char* version, Object* object, | |
552 | const elfcpp::Sym<size, big_endian>&); | |
553 | ||
ead1e424 ILT |
554 | // Initialize fields for an Output_data. |
555 | void | |
556 | init(const char* name, Output_data*, Value_type value, Size_type symsize, | |
557 | elfcpp::STT, elfcpp::STB, elfcpp::STV, unsigned char nonvis, | |
558 | bool offset_is_from_end); | |
559 | ||
560 | // Initialize fields for an Output_segment. | |
561 | void | |
562 | init(const char* name, Output_segment*, Value_type value, Size_type symsize, | |
563 | elfcpp::STT, elfcpp::STB, elfcpp::STV, unsigned char nonvis, | |
564 | Segment_offset_base offset_base); | |
565 | ||
566 | // Initialize fields for a constant. | |
567 | void | |
568 | init(const char* name, Value_type value, Size_type symsize, | |
569 | elfcpp::STT, elfcpp::STB, elfcpp::STV, unsigned char nonvis); | |
570 | ||
1564db8d ILT |
571 | // Override existing symbol. |
572 | template<bool big_endian> | |
573 | void | |
14b31740 ILT |
574 | override(const elfcpp::Sym<size, big_endian>&, Object* object, |
575 | const char* version); | |
1564db8d | 576 | |
86f2e683 ILT |
577 | // Override existing symbol with a special symbol. |
578 | void | |
579 | override_with_special(const Sized_symbol<size>*); | |
580 | ||
1564db8d ILT |
581 | // Return the symbol's value. |
582 | Value_type | |
583 | value() const | |
584 | { return this->value_; } | |
585 | ||
586 | // Return the symbol's size (we can't call this 'size' because that | |
587 | // is a template parameter). | |
588 | Size_type | |
589 | symsize() const | |
ead1e424 ILT |
590 | { return this->symsize_; } |
591 | ||
592 | // Set the symbol size. This is used when resolving common symbols. | |
593 | void | |
594 | set_symsize(Size_type symsize) | |
595 | { this->symsize_ = symsize; } | |
1564db8d | 596 | |
75f65a3e ILT |
597 | // Set the symbol value. This is called when we store the final |
598 | // values of the symbols into the symbol table. | |
599 | void | |
600 | set_value(Value_type value) | |
601 | { this->value_ = value; } | |
602 | ||
14bfc3f5 ILT |
603 | private: |
604 | Sized_symbol(const Sized_symbol&); | |
605 | Sized_symbol& operator=(const Sized_symbol&); | |
606 | ||
ead1e424 ILT |
607 | // Symbol value. Before Layout::finalize this is the offset in the |
608 | // input section. This is set to the final value during | |
609 | // Layout::finalize. | |
1564db8d | 610 | Value_type value_; |
14bfc3f5 | 611 | // Symbol size. |
ead1e424 ILT |
612 | Size_type symsize_; |
613 | }; | |
614 | ||
615 | // A struct describing a symbol defined by the linker, where the value | |
616 | // of the symbol is defined based on an output section. This is used | |
617 | // for symbols defined by the linker, like "_init_array_start". | |
618 | ||
619 | struct Define_symbol_in_section | |
620 | { | |
621 | // The symbol name. | |
622 | const char* name; | |
623 | // The name of the output section with which this symbol should be | |
624 | // associated. If there is no output section with that name, the | |
625 | // symbol will be defined as zero. | |
626 | const char* output_section; | |
627 | // The offset of the symbol within the output section. This is an | |
628 | // offset from the start of the output section, unless start_at_end | |
629 | // is true, in which case this is an offset from the end of the | |
630 | // output section. | |
631 | uint64_t value; | |
632 | // The size of the symbol. | |
633 | uint64_t size; | |
634 | // The symbol type. | |
635 | elfcpp::STT type; | |
636 | // The symbol binding. | |
637 | elfcpp::STB binding; | |
638 | // The symbol visibility. | |
639 | elfcpp::STV visibility; | |
640 | // The rest of the st_other field. | |
641 | unsigned char nonvis; | |
642 | // If true, the value field is an offset from the end of the output | |
643 | // section. | |
644 | bool offset_is_from_end; | |
645 | // If true, this symbol is defined only if we see a reference to it. | |
646 | bool only_if_ref; | |
647 | }; | |
648 | ||
649 | // A struct describing a symbol defined by the linker, where the value | |
650 | // of the symbol is defined based on a segment. This is used for | |
651 | // symbols defined by the linker, like "_end". We describe the | |
652 | // segment with which the symbol should be associated by its | |
653 | // characteristics. If no segment meets these characteristics, the | |
654 | // symbol will be defined as zero. If there is more than one segment | |
655 | // which meets these characteristics, we will use the first one. | |
656 | ||
657 | struct Define_symbol_in_segment | |
658 | { | |
659 | // The symbol name. | |
660 | const char* name; | |
661 | // The segment type where the symbol should be defined, typically | |
662 | // PT_LOAD. | |
663 | elfcpp::PT segment_type; | |
664 | // Bitmask of segment flags which must be set. | |
665 | elfcpp::PF segment_flags_set; | |
666 | // Bitmask of segment flags which must be clear. | |
667 | elfcpp::PF segment_flags_clear; | |
668 | // The offset of the symbol within the segment. The offset is | |
669 | // calculated from the position set by offset_base. | |
670 | uint64_t value; | |
671 | // The size of the symbol. | |
672 | uint64_t size; | |
673 | // The symbol type. | |
674 | elfcpp::STT type; | |
675 | // The symbol binding. | |
676 | elfcpp::STB binding; | |
677 | // The symbol visibility. | |
678 | elfcpp::STV visibility; | |
679 | // The rest of the st_other field. | |
680 | unsigned char nonvis; | |
681 | // The base from which we compute the offset. | |
682 | Symbol::Segment_offset_base offset_base; | |
683 | // If true, this symbol is defined only if we see a reference to it. | |
684 | bool only_if_ref; | |
14bfc3f5 ILT |
685 | }; |
686 | ||
f6ce93d6 ILT |
687 | // This class manages warnings. Warnings are a GNU extension. When |
688 | // we see a section named .gnu.warning.SYM in an object file, and if | |
689 | // we wind using the definition of SYM from that object file, then we | |
690 | // will issue a warning for any relocation against SYM from a | |
691 | // different object file. The text of the warning is the contents of | |
692 | // the section. This is not precisely the definition used by the old | |
693 | // GNU linker; the old GNU linker treated an occurrence of | |
694 | // .gnu.warning.SYM as defining a warning symbol. A warning symbol | |
695 | // would trigger a warning on any reference. However, it was | |
696 | // inconsistent in that a warning in a dynamic object only triggered | |
697 | // if there was no definition in a regular object. This linker is | |
698 | // different in that we only issue a warning if we use the symbol | |
699 | // definition from the same object file as the warning section. | |
700 | ||
701 | class Warnings | |
702 | { | |
703 | public: | |
704 | Warnings() | |
705 | : warnings_() | |
706 | { } | |
707 | ||
708 | // Add a warning for symbol NAME in section SHNDX in object OBJ. | |
709 | void | |
710 | add_warning(Symbol_table* symtab, const char* name, Object* obj, | |
711 | unsigned int shndx); | |
712 | ||
713 | // For each symbol for which we should give a warning, make a note | |
714 | // on the symbol. | |
715 | void | |
716 | note_warnings(Symbol_table* symtab); | |
717 | ||
718 | // Issue a warning for a reference to SYM at LOCATION. | |
719 | void | |
c06b7b0b | 720 | issue_warning(const Symbol* sym, const std::string& location) const; |
f6ce93d6 ILT |
721 | |
722 | private: | |
723 | Warnings(const Warnings&); | |
724 | Warnings& operator=(const Warnings&); | |
725 | ||
726 | // What we need to know to get the warning text. | |
727 | struct Warning_location | |
728 | { | |
729 | // The object the warning is in. | |
730 | Object* object; | |
731 | // The index of the warning section. | |
732 | unsigned int shndx; | |
733 | // The warning text if we have already loaded it. | |
734 | std::string text; | |
735 | ||
736 | Warning_location() | |
737 | : object(NULL), shndx(0), text() | |
738 | { } | |
739 | ||
740 | void | |
741 | set(Object* o, unsigned int s) | |
742 | { | |
743 | this->object = o; | |
744 | this->shndx = s; | |
745 | } | |
746 | ||
747 | void | |
748 | set_text(const char* t, off_t l) | |
749 | { this->text.assign(t, l); } | |
750 | }; | |
751 | ||
752 | // A mapping from warning symbol names (canonicalized in | |
753 | // Symbol_table's namepool_ field) to | |
754 | typedef Unordered_map<const char*, Warning_location> Warning_table; | |
755 | ||
756 | Warning_table warnings_; | |
757 | }; | |
758 | ||
14bfc3f5 ILT |
759 | // The main linker symbol table. |
760 | ||
bae7f79e ILT |
761 | class Symbol_table |
762 | { | |
763 | public: | |
764 | Symbol_table(); | |
765 | ||
1564db8d | 766 | ~Symbol_table(); |
bae7f79e | 767 | |
dbe717ef | 768 | // Add COUNT external symbols from the relocatable object RELOBJ to |
f6ce93d6 ILT |
769 | // the symbol table. SYMS is the symbols, SYM_NAMES is their names, |
770 | // SYM_NAME_SIZE is the size of SYM_NAMES. This sets SYMPOINTERS to | |
771 | // point to the symbols in the symbol table. | |
14bfc3f5 ILT |
772 | template<int size, bool big_endian> |
773 | void | |
dbe717ef ILT |
774 | add_from_relobj(Sized_relobj<size, big_endian>* relobj, |
775 | const unsigned char* syms, size_t count, | |
776 | const char* sym_names, size_t sym_name_size, | |
14bfc3f5 ILT |
777 | Symbol** sympointers); |
778 | ||
dbe717ef ILT |
779 | // Add COUNT dynamic symbols from the dynamic object DYNOBJ to the |
780 | // symbol table. SYMS is the symbols. SYM_NAMES is their names. | |
781 | // SYM_NAME_SIZE is the size of SYM_NAMES. The other parameters are | |
782 | // symbol version data. | |
783 | template<int size, bool big_endian> | |
784 | void | |
785 | add_from_dynobj(Sized_dynobj<size, big_endian>* dynobj, | |
786 | const unsigned char* syms, size_t count, | |
787 | const char* sym_names, size_t sym_name_size, | |
788 | const unsigned char* versym, size_t versym_size, | |
789 | const std::vector<const char*>*); | |
790 | ||
ead1e424 ILT |
791 | // Define a special symbol based on an Output_data. It is a |
792 | // multiple definition error if this symbol is already defined. | |
14b31740 ILT |
793 | Symbol* |
794 | define_in_output_data(const Target*, const char* name, const char* version, | |
795 | Output_data*, uint64_t value, uint64_t symsize, | |
ead1e424 ILT |
796 | elfcpp::STT type, elfcpp::STB binding, |
797 | elfcpp::STV visibility, unsigned char nonvis, | |
798 | bool offset_is_from_end, bool only_if_ref); | |
799 | ||
800 | // Define a special symbol based on an Output_segment. It is a | |
801 | // multiple definition error if this symbol is already defined. | |
14b31740 ILT |
802 | Symbol* |
803 | define_in_output_segment(const Target*, const char* name, | |
804 | const char* version, Output_segment*, | |
ead1e424 ILT |
805 | uint64_t value, uint64_t symsize, |
806 | elfcpp::STT type, elfcpp::STB binding, | |
807 | elfcpp::STV visibility, unsigned char nonvis, | |
808 | Symbol::Segment_offset_base, bool only_if_ref); | |
809 | ||
810 | // Define a special symbol with a constant value. It is a multiple | |
811 | // definition error if this symbol is already defined. | |
14b31740 ILT |
812 | Symbol* |
813 | define_as_constant(const Target*, const char* name, const char* version, | |
814 | uint64_t value, uint64_t symsize, elfcpp::STT type, | |
815 | elfcpp::STB binding, elfcpp::STV visibility, | |
816 | unsigned char nonvis, bool only_if_ref); | |
ead1e424 ILT |
817 | |
818 | // Define a set of symbols in output sections. | |
819 | void | |
14b31740 | 820 | define_symbols(const Layout*, const Target*, int count, |
ead1e424 ILT |
821 | const Define_symbol_in_section*); |
822 | ||
823 | // Define a set of symbols in output segments. | |
824 | void | |
14b31740 | 825 | define_symbols(const Layout*, const Target*, int count, |
ead1e424 ILT |
826 | const Define_symbol_in_segment*); |
827 | ||
61ba1cf9 ILT |
828 | // Look up a symbol. |
829 | Symbol* | |
830 | lookup(const char*, const char* version = NULL) const; | |
831 | ||
14bfc3f5 | 832 | // Return the real symbol associated with the forwarder symbol FROM. |
bae7f79e | 833 | Symbol* |
c06b7b0b | 834 | resolve_forwards(const Symbol* from) const; |
bae7f79e | 835 | |
a3ad94ed | 836 | // Return the bitsize (32 or 64) of the symbols in the table. |
14bfc3f5 ILT |
837 | int |
838 | get_size() const | |
839 | { return this->size_; } | |
bae7f79e | 840 | |
1564db8d ILT |
841 | // Return the sized version of a symbol in this table. |
842 | template<int size> | |
843 | Sized_symbol<size>* | |
5482377d | 844 | get_sized_symbol(Symbol* ACCEPT_SIZE) const; |
1564db8d ILT |
845 | |
846 | template<int size> | |
847 | const Sized_symbol<size>* | |
5482377d | 848 | get_sized_symbol(const Symbol* ACCEPT_SIZE) const; |
54dc6425 | 849 | |
ead1e424 ILT |
850 | // Return the count of undefined symbols seen. |
851 | int | |
852 | saw_undefined() const | |
853 | { return this->saw_undefined_; } | |
854 | ||
855 | // Allocate the common symbols | |
856 | void | |
857 | allocate_commons(const General_options&, Layout*); | |
858 | ||
f6ce93d6 ILT |
859 | // Add a warning for symbol NAME in section SHNDX in object OBJ. |
860 | void | |
861 | add_warning(const char* name, Object* obj, unsigned int shndx) | |
862 | { this->warnings_.add_warning(this, name, obj, shndx); } | |
863 | ||
864 | // Canonicalize a symbol name for use in the hash table. | |
865 | const char* | |
866 | canonicalize_name(const char* name) | |
f0641a0b | 867 | { return this->namepool_.add(name, NULL); } |
f6ce93d6 ILT |
868 | |
869 | // Possibly issue a warning for a reference to SYM at LOCATION which | |
870 | // is in OBJ. | |
871 | void | |
c06b7b0b | 872 | issue_warning(const Symbol* sym, const std::string& location) const |
f6ce93d6 ILT |
873 | { this->warnings_.issue_warning(sym, location); } |
874 | ||
a3ad94ed ILT |
875 | // Set the dynamic symbol indexes. INDEX is the index of the first |
876 | // global dynamic symbol. Pointers to the symbols are stored into | |
877 | // the vector. The names are stored into the Stringpool. This | |
878 | // returns an updated dynamic symbol index. | |
879 | unsigned int | |
14b31740 ILT |
880 | set_dynsym_indexes(const General_options*, const Target*, unsigned int index, |
881 | std::vector<Symbol*>*, Stringpool*, Versions*); | |
a3ad94ed | 882 | |
75f65a3e | 883 | // Finalize the symbol table after we have set the final addresses |
c06b7b0b ILT |
884 | // of all the input sections. This sets the final symbol indexes, |
885 | // values and adds the names to *POOL. INDEX is the index of the | |
16649710 ILT |
886 | // first global symbol. OFF is the file offset of the global symbol |
887 | // table, DYNOFF is the offset of the globals in the dynamic symbol | |
888 | // table, DYN_GLOBAL_INDEX is the index of the first global dynamic | |
889 | // symbol, and DYNCOUNT is the number of global dynamic symbols. | |
890 | // This records the parameters, and returns the new file offset. | |
75f65a3e | 891 | off_t |
16649710 ILT |
892 | finalize(unsigned int index, off_t off, off_t dynoff, |
893 | size_t dyn_global_index, size_t dyncount, Stringpool* pool); | |
1564db8d | 894 | |
61ba1cf9 ILT |
895 | // Write out the global symbols. |
896 | void | |
16649710 ILT |
897 | write_globals(const Target*, const Stringpool*, const Stringpool*, |
898 | Output_file*) const; | |
61ba1cf9 | 899 | |
a3ad94ed ILT |
900 | // Write out a section symbol. Return the updated offset. |
901 | void | |
902 | write_section_symbol(const Target*, const Output_section*, Output_file*, | |
903 | off_t) const; | |
904 | ||
bae7f79e ILT |
905 | private: |
906 | Symbol_table(const Symbol_table&); | |
907 | Symbol_table& operator=(const Symbol_table&); | |
908 | ||
a3ad94ed | 909 | // Set the size (32 or 64) of the symbols in the table. |
14bfc3f5 ILT |
910 | void |
911 | set_size(int size) | |
912 | { this->size_ = size; } | |
913 | ||
914 | // Make FROM a forwarder symbol to TO. | |
915 | void | |
916 | make_forwarder(Symbol* from, Symbol* to); | |
917 | ||
918 | // Add a symbol. | |
919 | template<int size, bool big_endian> | |
920 | Symbol* | |
f0641a0b ILT |
921 | add_from_object(Object*, const char *name, Stringpool::Key name_key, |
922 | const char *version, Stringpool::Key version_key, | |
923 | bool def, const elfcpp::Sym<size, big_endian>& sym); | |
14bfc3f5 ILT |
924 | |
925 | // Resolve symbols. | |
926 | template<int size, bool big_endian> | |
927 | static void | |
1564db8d ILT |
928 | resolve(Sized_symbol<size>* to, |
929 | const elfcpp::Sym<size, big_endian>& sym, | |
14b31740 | 930 | Object*, const char* version); |
14bfc3f5 | 931 | |
1564db8d | 932 | template<int size, bool big_endian> |
14bfc3f5 | 933 | static void |
14b31740 ILT |
934 | resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from, |
935 | const char* version ACCEPT_SIZE_ENDIAN); | |
936 | ||
86f2e683 ILT |
937 | // Whether we should override a symbol, based on flags in |
938 | // resolve.cc. | |
939 | static bool | |
940 | should_override(const Symbol*, unsigned int, bool*); | |
941 | ||
942 | // Whether we should override a symbol with a special symbol which | |
943 | // is automatically defined by the linker. | |
944 | static bool | |
945 | should_override_with_special(const Symbol*); | |
946 | ||
14b31740 ILT |
947 | // Define a special symbol. |
948 | template<int size, bool big_endian> | |
949 | Sized_symbol<size>* | |
306d9ef0 ILT |
950 | define_special_symbol(const Target* target, const char** pname, |
951 | const char** pversion, bool only_if_ref, | |
86f2e683 | 952 | Sized_symbol<size>** poldsym ACCEPT_SIZE_ENDIAN); |
14bfc3f5 | 953 | |
ead1e424 ILT |
954 | // Define a symbol in an Output_data, sized version. |
955 | template<int size> | |
14b31740 ILT |
956 | Sized_symbol<size>* |
957 | do_define_in_output_data(const Target*, const char* name, | |
958 | const char* version, Output_data*, | |
ead1e424 ILT |
959 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
960 | typename elfcpp::Elf_types<size>::Elf_WXword ssize, | |
961 | elfcpp::STT type, elfcpp::STB binding, | |
962 | elfcpp::STV visibility, unsigned char nonvis, | |
963 | bool offset_is_from_end, bool only_if_ref); | |
964 | ||
965 | // Define a symbol in an Output_segment, sized version. | |
966 | template<int size> | |
14b31740 | 967 | Sized_symbol<size>* |
ead1e424 | 968 | do_define_in_output_segment( |
14b31740 | 969 | const Target*, const char* name, const char* version, Output_segment* os, |
ead1e424 ILT |
970 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
971 | typename elfcpp::Elf_types<size>::Elf_WXword ssize, | |
972 | elfcpp::STT type, elfcpp::STB binding, | |
973 | elfcpp::STV visibility, unsigned char nonvis, | |
974 | Symbol::Segment_offset_base offset_base, bool only_if_ref); | |
975 | ||
976 | // Define a symbol as a constant, sized version. | |
977 | template<int size> | |
14b31740 | 978 | Sized_symbol<size>* |
ead1e424 | 979 | do_define_as_constant( |
14b31740 | 980 | const Target*, const char* name, const char* version, |
ead1e424 ILT |
981 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
982 | typename elfcpp::Elf_types<size>::Elf_WXword ssize, | |
983 | elfcpp::STT type, elfcpp::STB binding, | |
984 | elfcpp::STV visibility, unsigned char nonvis, | |
985 | bool only_if_ref); | |
986 | ||
987 | // Allocate the common symbols, sized version. | |
988 | template<int size> | |
989 | void | |
990 | do_allocate_commons(const General_options&, Layout*); | |
991 | ||
75f65a3e ILT |
992 | // Finalize symbols specialized for size. |
993 | template<int size> | |
994 | off_t | |
c06b7b0b | 995 | sized_finalize(unsigned int, off_t, Stringpool*); |
75f65a3e | 996 | |
61ba1cf9 ILT |
997 | // Write globals specialized for size and endianness. |
998 | template<int size, bool big_endian> | |
999 | void | |
16649710 ILT |
1000 | sized_write_globals(const Target*, const Stringpool*, const Stringpool*, |
1001 | Output_file*) const; | |
1002 | ||
1003 | // Write out a symbol to P. | |
1004 | template<int size, bool big_endian> | |
1005 | void | |
1006 | sized_write_symbol(Sized_symbol<size>*, unsigned int shndx, | |
6a469986 ILT |
1007 | const Stringpool*, unsigned char* p |
1008 | ACCEPT_SIZE_ENDIAN) const; | |
61ba1cf9 | 1009 | |
a3ad94ed ILT |
1010 | // Write out a section symbol, specialized for size and endianness. |
1011 | template<int size, bool big_endian> | |
1012 | void | |
1013 | sized_write_section_symbol(const Output_section*, Output_file*, off_t) const; | |
1014 | ||
54dc6425 ILT |
1015 | // The type of the symbol hash table. |
1016 | ||
f0641a0b | 1017 | typedef std::pair<Stringpool::Key, Stringpool::Key> Symbol_table_key; |
14bfc3f5 ILT |
1018 | |
1019 | struct Symbol_table_hash | |
1020 | { | |
1021 | size_t | |
1022 | operator()(const Symbol_table_key&) const; | |
1023 | }; | |
1024 | ||
1025 | struct Symbol_table_eq | |
1026 | { | |
1027 | bool | |
1028 | operator()(const Symbol_table_key&, const Symbol_table_key&) const; | |
1029 | }; | |
1030 | ||
1031 | typedef Unordered_map<Symbol_table_key, Symbol*, Symbol_table_hash, | |
1032 | Symbol_table_eq> Symbol_table_type; | |
1033 | ||
ead1e424 ILT |
1034 | // The type of the list of common symbols. |
1035 | ||
1036 | typedef std::vector<Symbol*> Commons_type; | |
1037 | ||
14bfc3f5 ILT |
1038 | // The size of the symbols in the symbol table (32 or 64). |
1039 | int size_; | |
1040 | ||
ead1e424 ILT |
1041 | // We increment this every time we see a new undefined symbol, for |
1042 | // use in archive groups. | |
1043 | int saw_undefined_; | |
1044 | ||
c06b7b0b ILT |
1045 | // The index of the first global symbol in the output file. |
1046 | unsigned int first_global_index_; | |
1047 | ||
75f65a3e ILT |
1048 | // The file offset within the output symtab section where we should |
1049 | // write the table. | |
1050 | off_t offset_; | |
1051 | ||
61ba1cf9 ILT |
1052 | // The number of global symbols we want to write out. |
1053 | size_t output_count_; | |
1054 | ||
16649710 ILT |
1055 | // The file offset of the global dynamic symbols, or 0 if none. |
1056 | off_t dynamic_offset_; | |
1057 | ||
1058 | // The index of the first global dynamic symbol. | |
1059 | unsigned int first_dynamic_global_index_; | |
1060 | ||
1061 | // The number of global dynamic symbols, or 0 if none. | |
1062 | off_t dynamic_count_; | |
1063 | ||
54dc6425 | 1064 | // The symbol hash table. |
14bfc3f5 ILT |
1065 | Symbol_table_type table_; |
1066 | ||
54dc6425 ILT |
1067 | // A pool of symbol names. This is used for all global symbols. |
1068 | // Entries in the hash table point into this pool. | |
14bfc3f5 | 1069 | Stringpool namepool_; |
bae7f79e | 1070 | |
14bfc3f5 | 1071 | // Forwarding symbols. |
c06b7b0b | 1072 | Unordered_map<const Symbol*, Symbol*> forwarders_; |
ead1e424 ILT |
1073 | |
1074 | // We don't expect there to be very many common symbols, so we keep | |
1075 | // a list of them. When we find a common symbol we add it to this | |
1076 | // list. It is possible that by the time we process the list the | |
1077 | // symbol is no longer a common symbol. It may also have become a | |
1078 | // forwarder. | |
1079 | Commons_type commons_; | |
f6ce93d6 ILT |
1080 | |
1081 | // Manage symbol warnings. | |
1082 | Warnings warnings_; | |
bae7f79e ILT |
1083 | }; |
1084 | ||
1564db8d ILT |
1085 | // We inline get_sized_symbol for efficiency. |
1086 | ||
1087 | template<int size> | |
1088 | Sized_symbol<size>* | |
5482377d | 1089 | Symbol_table::get_sized_symbol(Symbol* sym ACCEPT_SIZE) const |
1564db8d | 1090 | { |
a3ad94ed | 1091 | gold_assert(size == this->get_size()); |
1564db8d ILT |
1092 | return static_cast<Sized_symbol<size>*>(sym); |
1093 | } | |
1094 | ||
1095 | template<int size> | |
1096 | const Sized_symbol<size>* | |
5482377d | 1097 | Symbol_table::get_sized_symbol(const Symbol* sym ACCEPT_SIZE) const |
1564db8d | 1098 | { |
a3ad94ed | 1099 | gold_assert(size == this->get_size()); |
1564db8d ILT |
1100 | return static_cast<const Sized_symbol<size>*>(sym); |
1101 | } | |
1102 | ||
bae7f79e ILT |
1103 | } // End namespace gold. |
1104 | ||
1105 | #endif // !defined(GOLD_SYMTAB_H) |