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14bfc3f5 ILT |
1 | // symtab.cc -- the gold symbol table |
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 | ||
14bfc3f5 ILT |
23 | #include "gold.h" |
24 | ||
14bfc3f5 ILT |
25 | #include <stdint.h> |
26 | #include <string> | |
27 | #include <utility> | |
28 | ||
29 | #include "object.h" | |
dbe717ef | 30 | #include "dynobj.h" |
75f65a3e | 31 | #include "output.h" |
61ba1cf9 | 32 | #include "target.h" |
645f8123 | 33 | #include "workqueue.h" |
14bfc3f5 ILT |
34 | #include "symtab.h" |
35 | ||
36 | namespace gold | |
37 | { | |
38 | ||
39 | // Class Symbol. | |
40 | ||
ead1e424 ILT |
41 | // Initialize fields in Symbol. This initializes everything except u_ |
42 | // and source_. | |
14bfc3f5 | 43 | |
14bfc3f5 | 44 | void |
ead1e424 ILT |
45 | Symbol::init_fields(const char* name, const char* version, |
46 | elfcpp::STT type, elfcpp::STB binding, | |
47 | elfcpp::STV visibility, unsigned char nonvis) | |
14bfc3f5 ILT |
48 | { |
49 | this->name_ = name; | |
50 | this->version_ = version; | |
c06b7b0b ILT |
51 | this->symtab_index_ = 0; |
52 | this->dynsym_index_ = 0; | |
ead1e424 | 53 | this->got_offset_ = 0; |
f4151f89 | 54 | this->plt_offset_ = 0; |
ead1e424 ILT |
55 | this->type_ = type; |
56 | this->binding_ = binding; | |
57 | this->visibility_ = visibility; | |
58 | this->nonvis_ = nonvis; | |
59 | this->is_target_special_ = false; | |
1564db8d ILT |
60 | this->is_def_ = false; |
61 | this->is_forwarder_ = false; | |
c06b7b0b | 62 | this->needs_dynsym_entry_ = false; |
008db82e | 63 | this->in_reg_ = false; |
ead1e424 ILT |
64 | this->in_dyn_ = false; |
65 | this->has_got_offset_ = false; | |
f4151f89 | 66 | this->has_plt_offset_ = false; |
f6ce93d6 | 67 | this->has_warning_ = false; |
ead1e424 ILT |
68 | } |
69 | ||
70 | // Initialize the fields in the base class Symbol for SYM in OBJECT. | |
71 | ||
72 | template<int size, bool big_endian> | |
73 | void | |
74 | Symbol::init_base(const char* name, const char* version, Object* object, | |
75 | const elfcpp::Sym<size, big_endian>& sym) | |
76 | { | |
77 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), | |
78 | sym.get_st_visibility(), sym.get_st_nonvis()); | |
79 | this->u_.from_object.object = object; | |
80 | // FIXME: Handle SHN_XINDEX. | |
16649710 | 81 | this->u_.from_object.shndx = sym.get_st_shndx(); |
ead1e424 | 82 | this->source_ = FROM_OBJECT; |
008db82e | 83 | this->in_reg_ = !object->is_dynamic(); |
1564db8d | 84 | this->in_dyn_ = object->is_dynamic(); |
14bfc3f5 ILT |
85 | } |
86 | ||
ead1e424 ILT |
87 | // Initialize the fields in the base class Symbol for a symbol defined |
88 | // in an Output_data. | |
89 | ||
90 | void | |
91 | Symbol::init_base(const char* name, Output_data* od, elfcpp::STT type, | |
92 | elfcpp::STB binding, elfcpp::STV visibility, | |
93 | unsigned char nonvis, bool offset_is_from_end) | |
94 | { | |
95 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
96 | this->u_.in_output_data.output_data = od; | |
97 | this->u_.in_output_data.offset_is_from_end = offset_is_from_end; | |
98 | this->source_ = IN_OUTPUT_DATA; | |
008db82e | 99 | this->in_reg_ = true; |
ead1e424 ILT |
100 | } |
101 | ||
102 | // Initialize the fields in the base class Symbol for a symbol defined | |
103 | // in an Output_segment. | |
104 | ||
105 | void | |
106 | Symbol::init_base(const char* name, Output_segment* os, elfcpp::STT type, | |
107 | elfcpp::STB binding, elfcpp::STV visibility, | |
108 | unsigned char nonvis, Segment_offset_base offset_base) | |
109 | { | |
110 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
111 | this->u_.in_output_segment.output_segment = os; | |
112 | this->u_.in_output_segment.offset_base = offset_base; | |
113 | this->source_ = IN_OUTPUT_SEGMENT; | |
008db82e | 114 | this->in_reg_ = true; |
ead1e424 ILT |
115 | } |
116 | ||
117 | // Initialize the fields in the base class Symbol for a symbol defined | |
118 | // as a constant. | |
119 | ||
120 | void | |
121 | Symbol::init_base(const char* name, elfcpp::STT type, | |
122 | elfcpp::STB binding, elfcpp::STV visibility, | |
123 | unsigned char nonvis) | |
124 | { | |
125 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
126 | this->source_ = CONSTANT; | |
008db82e | 127 | this->in_reg_ = true; |
ead1e424 ILT |
128 | } |
129 | ||
130 | // Initialize the fields in Sized_symbol for SYM in OBJECT. | |
14bfc3f5 ILT |
131 | |
132 | template<int size> | |
133 | template<bool big_endian> | |
134 | void | |
135 | Sized_symbol<size>::init(const char* name, const char* version, Object* object, | |
136 | const elfcpp::Sym<size, big_endian>& sym) | |
137 | { | |
138 | this->init_base(name, version, object, sym); | |
139 | this->value_ = sym.get_st_value(); | |
ead1e424 ILT |
140 | this->symsize_ = sym.get_st_size(); |
141 | } | |
142 | ||
143 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
144 | // Output_data. | |
145 | ||
146 | template<int size> | |
147 | void | |
148 | Sized_symbol<size>::init(const char* name, Output_data* od, | |
149 | Value_type value, Size_type symsize, | |
150 | elfcpp::STT type, elfcpp::STB binding, | |
151 | elfcpp::STV visibility, unsigned char nonvis, | |
152 | bool offset_is_from_end) | |
153 | { | |
154 | this->init_base(name, od, type, binding, visibility, nonvis, | |
155 | offset_is_from_end); | |
156 | this->value_ = value; | |
157 | this->symsize_ = symsize; | |
158 | } | |
159 | ||
160 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
161 | // Output_segment. | |
162 | ||
163 | template<int size> | |
164 | void | |
165 | Sized_symbol<size>::init(const char* name, Output_segment* os, | |
166 | Value_type value, Size_type symsize, | |
167 | elfcpp::STT type, elfcpp::STB binding, | |
168 | elfcpp::STV visibility, unsigned char nonvis, | |
169 | Segment_offset_base offset_base) | |
170 | { | |
171 | this->init_base(name, os, type, binding, visibility, nonvis, offset_base); | |
172 | this->value_ = value; | |
173 | this->symsize_ = symsize; | |
174 | } | |
175 | ||
176 | // Initialize the fields in Sized_symbol for a symbol defined as a | |
177 | // constant. | |
178 | ||
179 | template<int size> | |
180 | void | |
181 | Sized_symbol<size>::init(const char* name, Value_type value, Size_type symsize, | |
182 | elfcpp::STT type, elfcpp::STB binding, | |
183 | elfcpp::STV visibility, unsigned char nonvis) | |
184 | { | |
185 | this->init_base(name, type, binding, visibility, nonvis); | |
186 | this->value_ = value; | |
187 | this->symsize_ = symsize; | |
14bfc3f5 ILT |
188 | } |
189 | ||
b3b74ddc ILT |
190 | // Return true if the final value of this symbol is known at link |
191 | // time. | |
192 | ||
193 | bool | |
194 | Symbol::final_value_is_known() const | |
195 | { | |
196 | // If we are not generating an executable, then no final values are | |
197 | // known, since they will change at runtime. | |
198 | if (!parameters->output_is_executable()) | |
199 | return false; | |
200 | ||
201 | // If the symbol is not from an object file, then it is defined, and | |
202 | // known. | |
203 | if (this->source_ != FROM_OBJECT) | |
204 | return true; | |
205 | ||
206 | // If the symbol is from a dynamic object, then the final value is | |
207 | // not known. | |
208 | if (this->object()->is_dynamic()) | |
209 | return false; | |
210 | ||
211 | // If the symbol is not undefined (it is defined or common), then | |
212 | // the final value is known. | |
213 | if (!this->is_undefined()) | |
214 | return true; | |
215 | ||
216 | // If the symbol is undefined, then whether the final value is known | |
217 | // depends on whether we are doing a static link. If we are doing a | |
218 | // dynamic link, then the final value could be filled in at runtime. | |
219 | // This could reasonably be the case for a weak undefined symbol. | |
220 | return parameters->doing_static_link(); | |
221 | } | |
222 | ||
14bfc3f5 ILT |
223 | // Class Symbol_table. |
224 | ||
225 | Symbol_table::Symbol_table() | |
9025d29d | 226 | : saw_undefined_(0), offset_(0), table_(), namepool_(), |
f6ce93d6 | 227 | forwarders_(), commons_(), warnings_() |
14bfc3f5 ILT |
228 | { |
229 | } | |
230 | ||
231 | Symbol_table::~Symbol_table() | |
232 | { | |
233 | } | |
234 | ||
235 | // The hash function. The key is always canonicalized, so we use a | |
236 | // simple combination of the pointers. | |
237 | ||
238 | size_t | |
239 | Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const | |
240 | { | |
f0641a0b | 241 | return key.first ^ key.second; |
14bfc3f5 ILT |
242 | } |
243 | ||
244 | // The symbol table key equality function. This is only called with | |
245 | // canonicalized name and version strings, so we can use pointer | |
246 | // comparison. | |
247 | ||
248 | bool | |
249 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, | |
250 | const Symbol_table_key& k2) const | |
251 | { | |
252 | return k1.first == k2.first && k1.second == k2.second; | |
253 | } | |
254 | ||
255 | // Make TO a symbol which forwards to FROM. | |
256 | ||
257 | void | |
258 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) | |
259 | { | |
a3ad94ed ILT |
260 | gold_assert(from != to); |
261 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); | |
14bfc3f5 ILT |
262 | this->forwarders_[from] = to; |
263 | from->set_forwarder(); | |
264 | } | |
265 | ||
61ba1cf9 ILT |
266 | // Resolve the forwards from FROM, returning the real symbol. |
267 | ||
14bfc3f5 | 268 | Symbol* |
c06b7b0b | 269 | Symbol_table::resolve_forwards(const Symbol* from) const |
14bfc3f5 | 270 | { |
a3ad94ed | 271 | gold_assert(from->is_forwarder()); |
c06b7b0b | 272 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
14bfc3f5 | 273 | this->forwarders_.find(from); |
a3ad94ed | 274 | gold_assert(p != this->forwarders_.end()); |
14bfc3f5 ILT |
275 | return p->second; |
276 | } | |
277 | ||
61ba1cf9 ILT |
278 | // Look up a symbol by name. |
279 | ||
280 | Symbol* | |
281 | Symbol_table::lookup(const char* name, const char* version) const | |
282 | { | |
f0641a0b ILT |
283 | Stringpool::Key name_key; |
284 | name = this->namepool_.find(name, &name_key); | |
61ba1cf9 ILT |
285 | if (name == NULL) |
286 | return NULL; | |
f0641a0b ILT |
287 | |
288 | Stringpool::Key version_key = 0; | |
61ba1cf9 ILT |
289 | if (version != NULL) |
290 | { | |
f0641a0b | 291 | version = this->namepool_.find(version, &version_key); |
61ba1cf9 ILT |
292 | if (version == NULL) |
293 | return NULL; | |
294 | } | |
295 | ||
f0641a0b | 296 | Symbol_table_key key(name_key, version_key); |
61ba1cf9 ILT |
297 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
298 | if (p == this->table_.end()) | |
299 | return NULL; | |
300 | return p->second; | |
301 | } | |
302 | ||
14bfc3f5 ILT |
303 | // Resolve a Symbol with another Symbol. This is only used in the |
304 | // unusual case where there are references to both an unversioned | |
305 | // symbol and a symbol with a version, and we then discover that that | |
1564db8d ILT |
306 | // version is the default version. Because this is unusual, we do |
307 | // this the slow way, by converting back to an ELF symbol. | |
14bfc3f5 | 308 | |
1564db8d | 309 | template<int size, bool big_endian> |
14bfc3f5 | 310 | void |
14b31740 ILT |
311 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from, |
312 | const char* version ACCEPT_SIZE_ENDIAN) | |
14bfc3f5 | 313 | { |
1564db8d ILT |
314 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
315 | elfcpp::Sym_write<size, big_endian> esym(buf); | |
316 | // We don't bother to set the st_name field. | |
317 | esym.put_st_value(from->value()); | |
318 | esym.put_st_size(from->symsize()); | |
319 | esym.put_st_info(from->binding(), from->type()); | |
ead1e424 | 320 | esym.put_st_other(from->visibility(), from->nonvis()); |
16649710 | 321 | esym.put_st_shndx(from->shndx()); |
14b31740 | 322 | Symbol_table::resolve(to, esym.sym(), from->object(), version); |
1ebd95fd ILT |
323 | if (from->in_reg()) |
324 | to->set_in_reg(); | |
325 | if (from->in_dyn()) | |
326 | to->set_in_dyn(); | |
14bfc3f5 ILT |
327 | } |
328 | ||
329 | // Add one symbol from OBJECT to the symbol table. NAME is symbol | |
330 | // name and VERSION is the version; both are canonicalized. DEF is | |
331 | // whether this is the default version. | |
332 | ||
333 | // If DEF is true, then this is the definition of a default version of | |
334 | // a symbol. That means that any lookup of NAME/NULL and any lookup | |
335 | // of NAME/VERSION should always return the same symbol. This is | |
336 | // obvious for references, but in particular we want to do this for | |
337 | // definitions: overriding NAME/NULL should also override | |
338 | // NAME/VERSION. If we don't do that, it would be very hard to | |
339 | // override functions in a shared library which uses versioning. | |
340 | ||
341 | // We implement this by simply making both entries in the hash table | |
342 | // point to the same Symbol structure. That is easy enough if this is | |
343 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible | |
344 | // that we have seen both already, in which case they will both have | |
345 | // independent entries in the symbol table. We can't simply change | |
346 | // the symbol table entry, because we have pointers to the entries | |
347 | // attached to the object files. So we mark the entry attached to the | |
348 | // object file as a forwarder, and record it in the forwarders_ map. | |
349 | // Note that entries in the hash table will never be marked as | |
350 | // forwarders. | |
351 | ||
352 | template<int size, bool big_endian> | |
353 | Symbol* | |
f6ce93d6 | 354 | Symbol_table::add_from_object(Object* object, |
14bfc3f5 | 355 | const char *name, |
f0641a0b ILT |
356 | Stringpool::Key name_key, |
357 | const char *version, | |
358 | Stringpool::Key version_key, | |
359 | bool def, | |
14bfc3f5 ILT |
360 | const elfcpp::Sym<size, big_endian>& sym) |
361 | { | |
362 | Symbol* const snull = NULL; | |
363 | std::pair<typename Symbol_table_type::iterator, bool> ins = | |
f0641a0b ILT |
364 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
365 | snull)); | |
14bfc3f5 ILT |
366 | |
367 | std::pair<typename Symbol_table_type::iterator, bool> insdef = | |
368 | std::make_pair(this->table_.end(), false); | |
369 | if (def) | |
370 | { | |
f0641a0b ILT |
371 | const Stringpool::Key vnull_key = 0; |
372 | insdef = this->table_.insert(std::make_pair(std::make_pair(name_key, | |
373 | vnull_key), | |
14bfc3f5 ILT |
374 | snull)); |
375 | } | |
376 | ||
377 | // ins.first: an iterator, which is a pointer to a pair. | |
378 | // ins.first->first: the key (a pair of name and version). | |
379 | // ins.first->second: the value (Symbol*). | |
380 | // ins.second: true if new entry was inserted, false if not. | |
381 | ||
1564db8d | 382 | Sized_symbol<size>* ret; |
ead1e424 ILT |
383 | bool was_undefined; |
384 | bool was_common; | |
14bfc3f5 ILT |
385 | if (!ins.second) |
386 | { | |
387 | // We already have an entry for NAME/VERSION. | |
593f47df ILT |
388 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (ins.first->second |
389 | SELECT_SIZE(size)); | |
a3ad94ed | 390 | gold_assert(ret != NULL); |
ead1e424 ILT |
391 | |
392 | was_undefined = ret->is_undefined(); | |
393 | was_common = ret->is_common(); | |
394 | ||
14b31740 | 395 | Symbol_table::resolve(ret, sym, object, version); |
14bfc3f5 ILT |
396 | |
397 | if (def) | |
398 | { | |
399 | if (insdef.second) | |
400 | { | |
401 | // This is the first time we have seen NAME/NULL. Make | |
402 | // NAME/NULL point to NAME/VERSION. | |
403 | insdef.first->second = ret; | |
404 | } | |
dbe717ef | 405 | else if (insdef.first->second != ret) |
14bfc3f5 ILT |
406 | { |
407 | // This is the unfortunate case where we already have | |
408 | // entries for both NAME/VERSION and NAME/NULL. | |
274e99f9 | 409 | const Sized_symbol<size>* sym2; |
593f47df | 410 | sym2 = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d ILT |
411 | insdef.first->second |
412 | SELECT_SIZE(size)); | |
593f47df | 413 | Symbol_table::resolve SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
14b31740 | 414 | ret, sym2, version SELECT_SIZE_ENDIAN(size, big_endian)); |
14bfc3f5 ILT |
415 | this->make_forwarder(insdef.first->second, ret); |
416 | insdef.first->second = ret; | |
417 | } | |
418 | } | |
419 | } | |
420 | else | |
421 | { | |
422 | // This is the first time we have seen NAME/VERSION. | |
a3ad94ed | 423 | gold_assert(ins.first->second == NULL); |
ead1e424 ILT |
424 | |
425 | was_undefined = false; | |
426 | was_common = false; | |
427 | ||
14bfc3f5 ILT |
428 | if (def && !insdef.second) |
429 | { | |
14b31740 ILT |
430 | // We already have an entry for NAME/NULL. If we override |
431 | // it, then change it to NAME/VERSION. | |
593f47df ILT |
432 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
433 | insdef.first->second | |
434 | SELECT_SIZE(size)); | |
14b31740 | 435 | Symbol_table::resolve(ret, sym, object, version); |
14bfc3f5 ILT |
436 | ins.first->second = ret; |
437 | } | |
438 | else | |
439 | { | |
f6ce93d6 ILT |
440 | Sized_target<size, big_endian>* target = |
441 | object->sized_target SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
442 | SELECT_SIZE_ENDIAN_ONLY(size, big_endian)); | |
1564db8d ILT |
443 | if (!target->has_make_symbol()) |
444 | ret = new Sized_symbol<size>(); | |
445 | else | |
14bfc3f5 | 446 | { |
1564db8d ILT |
447 | ret = target->make_symbol(); |
448 | if (ret == NULL) | |
14bfc3f5 ILT |
449 | { |
450 | // This means that we don't want a symbol table | |
451 | // entry after all. | |
452 | if (!def) | |
453 | this->table_.erase(ins.first); | |
454 | else | |
455 | { | |
456 | this->table_.erase(insdef.first); | |
457 | // Inserting insdef invalidated ins. | |
f0641a0b ILT |
458 | this->table_.erase(std::make_pair(name_key, |
459 | version_key)); | |
14bfc3f5 ILT |
460 | } |
461 | return NULL; | |
462 | } | |
463 | } | |
14bfc3f5 | 464 | |
1564db8d ILT |
465 | ret->init(name, version, object, sym); |
466 | ||
14bfc3f5 ILT |
467 | ins.first->second = ret; |
468 | if (def) | |
469 | { | |
470 | // This is the first time we have seen NAME/NULL. Point | |
471 | // it at the new entry for NAME/VERSION. | |
a3ad94ed | 472 | gold_assert(insdef.second); |
14bfc3f5 ILT |
473 | insdef.first->second = ret; |
474 | } | |
475 | } | |
476 | } | |
477 | ||
ead1e424 ILT |
478 | // Record every time we see a new undefined symbol, to speed up |
479 | // archive groups. | |
480 | if (!was_undefined && ret->is_undefined()) | |
481 | ++this->saw_undefined_; | |
482 | ||
483 | // Keep track of common symbols, to speed up common symbol | |
484 | // allocation. | |
485 | if (!was_common && ret->is_common()) | |
486 | this->commons_.push_back(ret); | |
487 | ||
14bfc3f5 ILT |
488 | return ret; |
489 | } | |
490 | ||
f6ce93d6 | 491 | // Add all the symbols in a relocatable object to the hash table. |
14bfc3f5 ILT |
492 | |
493 | template<int size, bool big_endian> | |
494 | void | |
dbe717ef ILT |
495 | Symbol_table::add_from_relobj( |
496 | Sized_relobj<size, big_endian>* relobj, | |
f6ce93d6 | 497 | const unsigned char* syms, |
14bfc3f5 ILT |
498 | size_t count, |
499 | const char* sym_names, | |
500 | size_t sym_name_size, | |
501 | Symbol** sympointers) | |
502 | { | |
9025d29d ILT |
503 | gold_assert(size == relobj->target()->get_size()); |
504 | gold_assert(size == parameters->get_size()); | |
14bfc3f5 | 505 | |
a783673b ILT |
506 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
507 | ||
f6ce93d6 | 508 | const unsigned char* p = syms; |
a783673b | 509 | for (size_t i = 0; i < count; ++i, p += sym_size) |
14bfc3f5 ILT |
510 | { |
511 | elfcpp::Sym<size, big_endian> sym(p); | |
a783673b | 512 | elfcpp::Sym<size, big_endian>* psym = &sym; |
14bfc3f5 | 513 | |
a783673b | 514 | unsigned int st_name = psym->get_st_name(); |
14bfc3f5 ILT |
515 | if (st_name >= sym_name_size) |
516 | { | |
54dc6425 ILT |
517 | fprintf(stderr, |
518 | _("%s: %s: bad global symbol name offset %u at %lu\n"), | |
dbe717ef | 519 | program_name, relobj->name().c_str(), st_name, |
14bfc3f5 ILT |
520 | static_cast<unsigned long>(i)); |
521 | gold_exit(false); | |
522 | } | |
523 | ||
dbe717ef ILT |
524 | const char* name = sym_names + st_name; |
525 | ||
a783673b ILT |
526 | // A symbol defined in a section which we are not including must |
527 | // be treated as an undefined symbol. | |
528 | unsigned char symbuf[sym_size]; | |
529 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
530 | unsigned int st_shndx = psym->get_st_shndx(); | |
531 | if (st_shndx != elfcpp::SHN_UNDEF | |
532 | && st_shndx < elfcpp::SHN_LORESERVE | |
dbe717ef | 533 | && !relobj->is_section_included(st_shndx)) |
a783673b ILT |
534 | { |
535 | memcpy(symbuf, p, sym_size); | |
536 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
537 | sw.put_st_shndx(elfcpp::SHN_UNDEF); | |
538 | psym = &sym2; | |
539 | } | |
540 | ||
14bfc3f5 ILT |
541 | // In an object file, an '@' in the name separates the symbol |
542 | // name from the version name. If there are two '@' characters, | |
543 | // this is the default version. | |
544 | const char* ver = strchr(name, '@'); | |
545 | ||
546 | Symbol* res; | |
547 | if (ver == NULL) | |
548 | { | |
f0641a0b | 549 | Stringpool::Key name_key; |
cfd73a4e | 550 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef | 551 | res = this->add_from_object(relobj, name, name_key, NULL, 0, |
f0641a0b | 552 | false, *psym); |
14bfc3f5 ILT |
553 | } |
554 | else | |
555 | { | |
f0641a0b | 556 | Stringpool::Key name_key; |
cfd73a4e | 557 | name = this->namepool_.add_prefix(name, ver - name, &name_key); |
f0641a0b | 558 | |
14bfc3f5 ILT |
559 | bool def = false; |
560 | ++ver; | |
561 | if (*ver == '@') | |
562 | { | |
563 | def = true; | |
564 | ++ver; | |
565 | } | |
f0641a0b ILT |
566 | |
567 | Stringpool::Key ver_key; | |
cfd73a4e | 568 | ver = this->namepool_.add(ver, true, &ver_key); |
f0641a0b | 569 | |
dbe717ef | 570 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
f0641a0b | 571 | def, *psym); |
14bfc3f5 ILT |
572 | } |
573 | ||
574 | *sympointers++ = res; | |
14bfc3f5 ILT |
575 | } |
576 | } | |
577 | ||
dbe717ef ILT |
578 | // Add all the symbols in a dynamic object to the hash table. |
579 | ||
580 | template<int size, bool big_endian> | |
581 | void | |
582 | Symbol_table::add_from_dynobj( | |
583 | Sized_dynobj<size, big_endian>* dynobj, | |
584 | const unsigned char* syms, | |
585 | size_t count, | |
586 | const char* sym_names, | |
587 | size_t sym_name_size, | |
588 | const unsigned char* versym, | |
589 | size_t versym_size, | |
590 | const std::vector<const char*>* version_map) | |
591 | { | |
9025d29d ILT |
592 | gold_assert(size == dynobj->target()->get_size()); |
593 | gold_assert(size == parameters->get_size()); | |
dbe717ef ILT |
594 | |
595 | if (versym != NULL && versym_size / 2 < count) | |
596 | { | |
597 | fprintf(stderr, _("%s: %s: too few symbol versions\n"), | |
598 | program_name, dynobj->name().c_str()); | |
599 | gold_exit(false); | |
600 | } | |
601 | ||
602 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
603 | ||
604 | const unsigned char* p = syms; | |
605 | const unsigned char* vs = versym; | |
606 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) | |
607 | { | |
608 | elfcpp::Sym<size, big_endian> sym(p); | |
609 | ||
610 | // Ignore symbols with local binding. | |
611 | if (sym.get_st_bind() == elfcpp::STB_LOCAL) | |
612 | continue; | |
613 | ||
614 | unsigned int st_name = sym.get_st_name(); | |
615 | if (st_name >= sym_name_size) | |
616 | { | |
617 | fprintf(stderr, _("%s: %s: bad symbol name offset %u at %lu\n"), | |
618 | program_name, dynobj->name().c_str(), st_name, | |
619 | static_cast<unsigned long>(i)); | |
620 | gold_exit(false); | |
621 | } | |
622 | ||
623 | const char* name = sym_names + st_name; | |
624 | ||
625 | if (versym == NULL) | |
626 | { | |
627 | Stringpool::Key name_key; | |
cfd73a4e | 628 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef ILT |
629 | this->add_from_object(dynobj, name, name_key, NULL, 0, |
630 | false, sym); | |
631 | continue; | |
632 | } | |
633 | ||
634 | // Read the version information. | |
635 | ||
636 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); | |
637 | ||
638 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; | |
639 | v &= elfcpp::VERSYM_VERSION; | |
640 | ||
64707334 ILT |
641 | // The Sun documentation says that V can be VER_NDX_LOCAL, or |
642 | // VER_NDX_GLOBAL, or a version index. The meaning of | |
643 | // VER_NDX_LOCAL is defined as "Symbol has local scope." The | |
644 | // old GNU linker will happily generate VER_NDX_LOCAL for an | |
645 | // undefined symbol. I don't know what the Sun linker will | |
646 | // generate. | |
647 | ||
648 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) | |
649 | && sym.get_st_shndx() != elfcpp::SHN_UNDEF) | |
dbe717ef ILT |
650 | { |
651 | // This symbol should not be visible outside the object. | |
652 | continue; | |
653 | } | |
654 | ||
655 | // At this point we are definitely going to add this symbol. | |
656 | Stringpool::Key name_key; | |
cfd73a4e | 657 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef | 658 | |
64707334 ILT |
659 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
660 | || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) | |
dbe717ef ILT |
661 | { |
662 | // This symbol does not have a version. | |
663 | this->add_from_object(dynobj, name, name_key, NULL, 0, false, sym); | |
664 | continue; | |
665 | } | |
666 | ||
667 | if (v >= version_map->size()) | |
668 | { | |
669 | fprintf(stderr, | |
670 | _("%s: %s: versym for symbol %zu out of range: %u\n"), | |
671 | program_name, dynobj->name().c_str(), i, v); | |
672 | gold_exit(false); | |
673 | } | |
674 | ||
675 | const char* version = (*version_map)[v]; | |
676 | if (version == NULL) | |
677 | { | |
678 | fprintf(stderr, _("%s: %s: versym for symbol %zu has no name: %u\n"), | |
679 | program_name, dynobj->name().c_str(), i, v); | |
680 | gold_exit(false); | |
681 | } | |
682 | ||
683 | Stringpool::Key version_key; | |
cfd73a4e | 684 | version = this->namepool_.add(version, true, &version_key); |
dbe717ef ILT |
685 | |
686 | // If this is an absolute symbol, and the version name and | |
687 | // symbol name are the same, then this is the version definition | |
688 | // symbol. These symbols exist to support using -u to pull in | |
689 | // particular versions. We do not want to record a version for | |
690 | // them. | |
691 | if (sym.get_st_shndx() == elfcpp::SHN_ABS && name_key == version_key) | |
692 | { | |
693 | this->add_from_object(dynobj, name, name_key, NULL, 0, false, sym); | |
694 | continue; | |
695 | } | |
696 | ||
697 | const bool def = !hidden && sym.get_st_shndx() != elfcpp::SHN_UNDEF; | |
698 | ||
699 | this->add_from_object(dynobj, name, name_key, version, version_key, | |
700 | def, sym); | |
701 | } | |
702 | } | |
703 | ||
ead1e424 ILT |
704 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
705 | // true, then only create the symbol if there is a reference to it. | |
86f2e683 | 706 | // If this does not return NULL, it sets *POLDSYM to the existing |
306d9ef0 | 707 | // symbol if there is one. This canonicalizes *PNAME and *PVERSION. |
ead1e424 ILT |
708 | |
709 | template<int size, bool big_endian> | |
710 | Sized_symbol<size>* | |
306d9ef0 ILT |
711 | Symbol_table::define_special_symbol(const Target* target, const char** pname, |
712 | const char** pversion, bool only_if_ref, | |
86f2e683 | 713 | Sized_symbol<size>** poldsym |
593f47df | 714 | ACCEPT_SIZE_ENDIAN) |
ead1e424 | 715 | { |
ead1e424 ILT |
716 | Symbol* oldsym; |
717 | Sized_symbol<size>* sym; | |
86f2e683 ILT |
718 | bool add_to_table = false; |
719 | typename Symbol_table_type::iterator add_loc = this->table_.end(); | |
ead1e424 ILT |
720 | |
721 | if (only_if_ref) | |
722 | { | |
306d9ef0 | 723 | oldsym = this->lookup(*pname, *pversion); |
f6ce93d6 | 724 | if (oldsym == NULL || !oldsym->is_undefined()) |
ead1e424 | 725 | return NULL; |
306d9ef0 ILT |
726 | |
727 | *pname = oldsym->name(); | |
728 | *pversion = oldsym->version(); | |
ead1e424 ILT |
729 | } |
730 | else | |
731 | { | |
14b31740 | 732 | // Canonicalize NAME and VERSION. |
f0641a0b | 733 | Stringpool::Key name_key; |
cfd73a4e | 734 | *pname = this->namepool_.add(*pname, true, &name_key); |
ead1e424 | 735 | |
14b31740 | 736 | Stringpool::Key version_key = 0; |
306d9ef0 | 737 | if (*pversion != NULL) |
cfd73a4e | 738 | *pversion = this->namepool_.add(*pversion, true, &version_key); |
14b31740 | 739 | |
ead1e424 | 740 | Symbol* const snull = NULL; |
ead1e424 | 741 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
14b31740 ILT |
742 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
743 | version_key), | |
ead1e424 ILT |
744 | snull)); |
745 | ||
746 | if (!ins.second) | |
747 | { | |
14b31740 | 748 | // We already have a symbol table entry for NAME/VERSION. |
ead1e424 | 749 | oldsym = ins.first->second; |
a3ad94ed | 750 | gold_assert(oldsym != NULL); |
ead1e424 ILT |
751 | } |
752 | else | |
753 | { | |
754 | // We haven't seen this symbol before. | |
a3ad94ed | 755 | gold_assert(ins.first->second == NULL); |
86f2e683 ILT |
756 | add_to_table = true; |
757 | add_loc = ins.first; | |
ead1e424 ILT |
758 | oldsym = NULL; |
759 | } | |
760 | } | |
761 | ||
86f2e683 ILT |
762 | if (!target->has_make_symbol()) |
763 | sym = new Sized_symbol<size>(); | |
764 | else | |
ead1e424 | 765 | { |
86f2e683 ILT |
766 | gold_assert(target->get_size() == size); |
767 | gold_assert(target->is_big_endian() ? big_endian : !big_endian); | |
768 | typedef Sized_target<size, big_endian> My_target; | |
769 | const My_target* sized_target = | |
770 | static_cast<const My_target*>(target); | |
771 | sym = sized_target->make_symbol(); | |
772 | if (sym == NULL) | |
773 | return NULL; | |
774 | } | |
ead1e424 | 775 | |
86f2e683 ILT |
776 | if (add_to_table) |
777 | add_loc->second = sym; | |
778 | else | |
779 | gold_assert(oldsym != NULL); | |
ead1e424 | 780 | |
86f2e683 ILT |
781 | *poldsym = this->get_sized_symbol SELECT_SIZE_NAME(size) (oldsym |
782 | SELECT_SIZE(size)); | |
ead1e424 ILT |
783 | |
784 | return sym; | |
785 | } | |
786 | ||
787 | // Define a symbol based on an Output_data. | |
788 | ||
14b31740 ILT |
789 | Symbol* |
790 | Symbol_table::define_in_output_data(const Target* target, const char* name, | |
791 | const char* version, Output_data* od, | |
ead1e424 ILT |
792 | uint64_t value, uint64_t symsize, |
793 | elfcpp::STT type, elfcpp::STB binding, | |
794 | elfcpp::STV visibility, | |
795 | unsigned char nonvis, | |
796 | bool offset_is_from_end, | |
797 | bool only_if_ref) | |
798 | { | |
9025d29d | 799 | if (parameters->get_size() == 32) |
86f2e683 ILT |
800 | { |
801 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
802 | return this->do_define_in_output_data<32>(target, name, version, od, | |
803 | value, symsize, type, binding, | |
804 | visibility, nonvis, | |
805 | offset_is_from_end, | |
806 | only_if_ref); | |
807 | #else | |
808 | gold_unreachable(); | |
809 | #endif | |
810 | } | |
9025d29d | 811 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
812 | { |
813 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
814 | return this->do_define_in_output_data<64>(target, name, version, od, | |
815 | value, symsize, type, binding, | |
816 | visibility, nonvis, | |
817 | offset_is_from_end, | |
818 | only_if_ref); | |
819 | #else | |
820 | gold_unreachable(); | |
821 | #endif | |
822 | } | |
ead1e424 | 823 | else |
a3ad94ed | 824 | gold_unreachable(); |
ead1e424 ILT |
825 | } |
826 | ||
827 | // Define a symbol in an Output_data, sized version. | |
828 | ||
829 | template<int size> | |
14b31740 | 830 | Sized_symbol<size>* |
ead1e424 | 831 | Symbol_table::do_define_in_output_data( |
14b31740 | 832 | const Target* target, |
ead1e424 | 833 | const char* name, |
14b31740 | 834 | const char* version, |
ead1e424 ILT |
835 | Output_data* od, |
836 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
837 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
838 | elfcpp::STT type, | |
839 | elfcpp::STB binding, | |
840 | elfcpp::STV visibility, | |
841 | unsigned char nonvis, | |
842 | bool offset_is_from_end, | |
843 | bool only_if_ref) | |
844 | { | |
845 | Sized_symbol<size>* sym; | |
86f2e683 | 846 | Sized_symbol<size>* oldsym; |
ead1e424 | 847 | |
9025d29d | 848 | if (parameters->is_big_endian()) |
193a53d9 ILT |
849 | { |
850 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
851 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
306d9ef0 | 852 | target, &name, &version, only_if_ref, &oldsym |
193a53d9 ILT |
853 | SELECT_SIZE_ENDIAN(size, true)); |
854 | #else | |
855 | gold_unreachable(); | |
856 | #endif | |
857 | } | |
ead1e424 | 858 | else |
193a53d9 ILT |
859 | { |
860 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
861 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
306d9ef0 | 862 | target, &name, &version, only_if_ref, &oldsym |
193a53d9 ILT |
863 | SELECT_SIZE_ENDIAN(size, false)); |
864 | #else | |
865 | gold_unreachable(); | |
866 | #endif | |
867 | } | |
ead1e424 ILT |
868 | |
869 | if (sym == NULL) | |
14b31740 | 870 | return NULL; |
ead1e424 | 871 | |
d4f5281b | 872 | gold_assert(version == NULL || oldsym != NULL); |
ead1e424 ILT |
873 | sym->init(name, od, value, symsize, type, binding, visibility, nonvis, |
874 | offset_is_from_end); | |
14b31740 | 875 | |
86f2e683 ILT |
876 | if (oldsym != NULL |
877 | && Symbol_table::should_override_with_special(oldsym)) | |
878 | oldsym->override_with_special(sym); | |
879 | ||
14b31740 | 880 | return sym; |
ead1e424 ILT |
881 | } |
882 | ||
883 | // Define a symbol based on an Output_segment. | |
884 | ||
14b31740 ILT |
885 | Symbol* |
886 | Symbol_table::define_in_output_segment(const Target* target, const char* name, | |
887 | const char* version, Output_segment* os, | |
ead1e424 ILT |
888 | uint64_t value, uint64_t symsize, |
889 | elfcpp::STT type, elfcpp::STB binding, | |
890 | elfcpp::STV visibility, | |
891 | unsigned char nonvis, | |
892 | Symbol::Segment_offset_base offset_base, | |
893 | bool only_if_ref) | |
894 | { | |
9025d29d | 895 | if (parameters->get_size() == 32) |
86f2e683 ILT |
896 | { |
897 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
898 | return this->do_define_in_output_segment<32>(target, name, version, os, | |
899 | value, symsize, type, | |
900 | binding, visibility, nonvis, | |
901 | offset_base, only_if_ref); | |
902 | #else | |
903 | gold_unreachable(); | |
904 | #endif | |
905 | } | |
9025d29d | 906 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
907 | { |
908 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
909 | return this->do_define_in_output_segment<64>(target, name, version, os, | |
910 | value, symsize, type, | |
911 | binding, visibility, nonvis, | |
912 | offset_base, only_if_ref); | |
913 | #else | |
914 | gold_unreachable(); | |
915 | #endif | |
916 | } | |
ead1e424 | 917 | else |
a3ad94ed | 918 | gold_unreachable(); |
ead1e424 ILT |
919 | } |
920 | ||
921 | // Define a symbol in an Output_segment, sized version. | |
922 | ||
923 | template<int size> | |
14b31740 | 924 | Sized_symbol<size>* |
ead1e424 | 925 | Symbol_table::do_define_in_output_segment( |
14b31740 | 926 | const Target* target, |
ead1e424 | 927 | const char* name, |
14b31740 | 928 | const char* version, |
ead1e424 ILT |
929 | Output_segment* os, |
930 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
931 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
932 | elfcpp::STT type, | |
933 | elfcpp::STB binding, | |
934 | elfcpp::STV visibility, | |
935 | unsigned char nonvis, | |
936 | Symbol::Segment_offset_base offset_base, | |
937 | bool only_if_ref) | |
938 | { | |
939 | Sized_symbol<size>* sym; | |
86f2e683 | 940 | Sized_symbol<size>* oldsym; |
ead1e424 | 941 | |
9025d29d ILT |
942 | if (parameters->is_big_endian()) |
943 | { | |
944 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
945 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
946 | target, &name, &version, only_if_ref, &oldsym | |
947 | SELECT_SIZE_ENDIAN(size, true)); | |
948 | #else | |
949 | gold_unreachable(); | |
950 | #endif | |
951 | } | |
ead1e424 | 952 | else |
9025d29d ILT |
953 | { |
954 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
955 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
956 | target, &name, &version, only_if_ref, &oldsym | |
957 | SELECT_SIZE_ENDIAN(size, false)); | |
958 | #else | |
959 | gold_unreachable(); | |
960 | #endif | |
961 | } | |
ead1e424 ILT |
962 | |
963 | if (sym == NULL) | |
14b31740 | 964 | return NULL; |
ead1e424 | 965 | |
d4f5281b | 966 | gold_assert(version == NULL || oldsym != NULL); |
ead1e424 ILT |
967 | sym->init(name, os, value, symsize, type, binding, visibility, nonvis, |
968 | offset_base); | |
14b31740 | 969 | |
86f2e683 ILT |
970 | if (oldsym != NULL |
971 | && Symbol_table::should_override_with_special(oldsym)) | |
972 | oldsym->override_with_special(sym); | |
973 | ||
14b31740 | 974 | return sym; |
ead1e424 ILT |
975 | } |
976 | ||
977 | // Define a special symbol with a constant value. It is a multiple | |
978 | // definition error if this symbol is already defined. | |
979 | ||
14b31740 ILT |
980 | Symbol* |
981 | Symbol_table::define_as_constant(const Target* target, const char* name, | |
982 | const char* version, uint64_t value, | |
983 | uint64_t symsize, elfcpp::STT type, | |
984 | elfcpp::STB binding, elfcpp::STV visibility, | |
985 | unsigned char nonvis, bool only_if_ref) | |
ead1e424 | 986 | { |
9025d29d | 987 | if (parameters->get_size() == 32) |
86f2e683 ILT |
988 | { |
989 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
990 | return this->do_define_as_constant<32>(target, name, version, value, | |
991 | symsize, type, binding, | |
992 | visibility, nonvis, only_if_ref); | |
993 | #else | |
994 | gold_unreachable(); | |
995 | #endif | |
996 | } | |
9025d29d | 997 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
998 | { |
999 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
1000 | return this->do_define_as_constant<64>(target, name, version, value, | |
1001 | symsize, type, binding, | |
1002 | visibility, nonvis, only_if_ref); | |
1003 | #else | |
1004 | gold_unreachable(); | |
1005 | #endif | |
1006 | } | |
ead1e424 | 1007 | else |
a3ad94ed | 1008 | gold_unreachable(); |
ead1e424 ILT |
1009 | } |
1010 | ||
1011 | // Define a symbol as a constant, sized version. | |
1012 | ||
1013 | template<int size> | |
14b31740 | 1014 | Sized_symbol<size>* |
ead1e424 | 1015 | Symbol_table::do_define_as_constant( |
14b31740 | 1016 | const Target* target, |
ead1e424 | 1017 | const char* name, |
14b31740 | 1018 | const char* version, |
ead1e424 ILT |
1019 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
1020 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
1021 | elfcpp::STT type, | |
1022 | elfcpp::STB binding, | |
1023 | elfcpp::STV visibility, | |
1024 | unsigned char nonvis, | |
1025 | bool only_if_ref) | |
1026 | { | |
1027 | Sized_symbol<size>* sym; | |
86f2e683 | 1028 | Sized_symbol<size>* oldsym; |
ead1e424 | 1029 | |
9025d29d ILT |
1030 | if (parameters->is_big_endian()) |
1031 | { | |
1032 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
1033 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
1034 | target, &name, &version, only_if_ref, &oldsym | |
1035 | SELECT_SIZE_ENDIAN(size, true)); | |
1036 | #else | |
1037 | gold_unreachable(); | |
1038 | #endif | |
1039 | } | |
ead1e424 | 1040 | else |
9025d29d ILT |
1041 | { |
1042 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
1043 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
1044 | target, &name, &version, only_if_ref, &oldsym | |
1045 | SELECT_SIZE_ENDIAN(size, false)); | |
1046 | #else | |
1047 | gold_unreachable(); | |
1048 | #endif | |
1049 | } | |
ead1e424 ILT |
1050 | |
1051 | if (sym == NULL) | |
14b31740 | 1052 | return NULL; |
ead1e424 | 1053 | |
d4f5281b | 1054 | gold_assert(version == NULL || oldsym != NULL); |
ead1e424 | 1055 | sym->init(name, value, symsize, type, binding, visibility, nonvis); |
14b31740 | 1056 | |
86f2e683 ILT |
1057 | if (oldsym != NULL |
1058 | && Symbol_table::should_override_with_special(oldsym)) | |
1059 | oldsym->override_with_special(sym); | |
1060 | ||
14b31740 | 1061 | return sym; |
ead1e424 ILT |
1062 | } |
1063 | ||
1064 | // Define a set of symbols in output sections. | |
1065 | ||
1066 | void | |
14b31740 ILT |
1067 | Symbol_table::define_symbols(const Layout* layout, const Target* target, |
1068 | int count, const Define_symbol_in_section* p) | |
ead1e424 ILT |
1069 | { |
1070 | for (int i = 0; i < count; ++i, ++p) | |
1071 | { | |
1072 | Output_section* os = layout->find_output_section(p->output_section); | |
1073 | if (os != NULL) | |
14b31740 ILT |
1074 | this->define_in_output_data(target, p->name, NULL, os, p->value, |
1075 | p->size, p->type, p->binding, | |
1076 | p->visibility, p->nonvis, | |
1077 | p->offset_is_from_end, p->only_if_ref); | |
ead1e424 | 1078 | else |
14b31740 | 1079 | this->define_as_constant(target, p->name, NULL, 0, p->size, p->type, |
ead1e424 ILT |
1080 | p->binding, p->visibility, p->nonvis, |
1081 | p->only_if_ref); | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | // Define a set of symbols in output segments. | |
1086 | ||
1087 | void | |
14b31740 ILT |
1088 | Symbol_table::define_symbols(const Layout* layout, const Target* target, |
1089 | int count, const Define_symbol_in_segment* p) | |
ead1e424 ILT |
1090 | { |
1091 | for (int i = 0; i < count; ++i, ++p) | |
1092 | { | |
1093 | Output_segment* os = layout->find_output_segment(p->segment_type, | |
1094 | p->segment_flags_set, | |
1095 | p->segment_flags_clear); | |
1096 | if (os != NULL) | |
14b31740 ILT |
1097 | this->define_in_output_segment(target, p->name, NULL, os, p->value, |
1098 | p->size, p->type, p->binding, | |
1099 | p->visibility, p->nonvis, | |
1100 | p->offset_base, p->only_if_ref); | |
ead1e424 | 1101 | else |
14b31740 | 1102 | this->define_as_constant(target, p->name, NULL, 0, p->size, p->type, |
ead1e424 ILT |
1103 | p->binding, p->visibility, p->nonvis, |
1104 | p->only_if_ref); | |
1105 | } | |
1106 | } | |
1107 | ||
a3ad94ed ILT |
1108 | // Set the dynamic symbol indexes. INDEX is the index of the first |
1109 | // global dynamic symbol. Pointers to the symbols are stored into the | |
1110 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
1111 | // updated dynamic symbol index. | |
1112 | ||
1113 | unsigned int | |
14b31740 ILT |
1114 | Symbol_table::set_dynsym_indexes(const General_options* options, |
1115 | const Target* target, | |
1116 | unsigned int index, | |
a3ad94ed | 1117 | std::vector<Symbol*>* syms, |
14b31740 ILT |
1118 | Stringpool* dynpool, |
1119 | Versions* versions) | |
a3ad94ed ILT |
1120 | { |
1121 | for (Symbol_table_type::iterator p = this->table_.begin(); | |
1122 | p != this->table_.end(); | |
1123 | ++p) | |
1124 | { | |
1125 | Symbol* sym = p->second; | |
16649710 ILT |
1126 | |
1127 | // Note that SYM may already have a dynamic symbol index, since | |
1128 | // some symbols appear more than once in the symbol table, with | |
1129 | // and without a version. | |
1130 | ||
a6badf5a ILT |
1131 | if (!sym->needs_dynsym_entry() |
1132 | && (!options->export_dynamic() | |
1133 | || !sym->in_reg() | |
1134 | || !sym->is_externally_visible())) | |
16649710 ILT |
1135 | sym->set_dynsym_index(-1U); |
1136 | else if (!sym->has_dynsym_index()) | |
a3ad94ed ILT |
1137 | { |
1138 | sym->set_dynsym_index(index); | |
1139 | ++index; | |
1140 | syms->push_back(sym); | |
cfd73a4e | 1141 | dynpool->add(sym->name(), false, NULL); |
14b31740 ILT |
1142 | |
1143 | // Record any version information. | |
1144 | if (sym->version() != NULL) | |
1145 | versions->record_version(options, dynpool, sym); | |
a3ad94ed ILT |
1146 | } |
1147 | } | |
1148 | ||
14b31740 ILT |
1149 | // Finish up the versions. In some cases this may add new dynamic |
1150 | // symbols. | |
1151 | index = versions->finalize(target, this, index, syms); | |
1152 | ||
a3ad94ed ILT |
1153 | return index; |
1154 | } | |
1155 | ||
c06b7b0b ILT |
1156 | // Set the final values for all the symbols. The index of the first |
1157 | // global symbol in the output file is INDEX. Record the file offset | |
75f65a3e | 1158 | // OFF. Add their names to POOL. Return the new file offset. |
54dc6425 | 1159 | |
75f65a3e | 1160 | off_t |
16649710 ILT |
1161 | Symbol_table::finalize(unsigned int index, off_t off, off_t dynoff, |
1162 | size_t dyn_global_index, size_t dyncount, | |
1163 | Stringpool* pool) | |
54dc6425 | 1164 | { |
f6ce93d6 ILT |
1165 | off_t ret; |
1166 | ||
a3ad94ed | 1167 | gold_assert(index != 0); |
c06b7b0b ILT |
1168 | this->first_global_index_ = index; |
1169 | ||
16649710 ILT |
1170 | this->dynamic_offset_ = dynoff; |
1171 | this->first_dynamic_global_index_ = dyn_global_index; | |
1172 | this->dynamic_count_ = dyncount; | |
1173 | ||
9025d29d ILT |
1174 | if (parameters->get_size() == 32) |
1175 | { | |
1176 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE) | |
1177 | ret = this->sized_finalize<32>(index, off, pool); | |
1178 | #else | |
1179 | gold_unreachable(); | |
1180 | #endif | |
1181 | } | |
1182 | else if (parameters->get_size() == 64) | |
1183 | { | |
1184 | #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE) | |
1185 | ret = this->sized_finalize<64>(index, off, pool); | |
1186 | #else | |
1187 | gold_unreachable(); | |
1188 | #endif | |
1189 | } | |
61ba1cf9 | 1190 | else |
a3ad94ed | 1191 | gold_unreachable(); |
f6ce93d6 ILT |
1192 | |
1193 | // Now that we have the final symbol table, we can reliably note | |
1194 | // which symbols should get warnings. | |
1195 | this->warnings_.note_warnings(this); | |
1196 | ||
1197 | return ret; | |
75f65a3e ILT |
1198 | } |
1199 | ||
ead1e424 ILT |
1200 | // Set the final value for all the symbols. This is called after |
1201 | // Layout::finalize, so all the output sections have their final | |
1202 | // address. | |
75f65a3e ILT |
1203 | |
1204 | template<int size> | |
1205 | off_t | |
c06b7b0b | 1206 | Symbol_table::sized_finalize(unsigned index, off_t off, Stringpool* pool) |
75f65a3e | 1207 | { |
ead1e424 | 1208 | off = align_address(off, size >> 3); |
75f65a3e ILT |
1209 | this->offset_ = off; |
1210 | ||
c06b7b0b ILT |
1211 | size_t orig_index = index; |
1212 | ||
75f65a3e | 1213 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
c06b7b0b ILT |
1214 | for (Symbol_table_type::iterator p = this->table_.begin(); |
1215 | p != this->table_.end(); | |
1216 | ++p) | |
54dc6425 | 1217 | { |
75f65a3e | 1218 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); |
54dc6425 | 1219 | |
75f65a3e | 1220 | // FIXME: Here we need to decide which symbols should go into |
a3ad94ed ILT |
1221 | // the output file, based on --strip. |
1222 | ||
1223 | // The default version of a symbol may appear twice in the | |
1224 | // symbol table. We only need to finalize it once. | |
1225 | if (sym->has_symtab_index()) | |
1226 | continue; | |
75f65a3e | 1227 | |
008db82e ILT |
1228 | if (!sym->in_reg()) |
1229 | { | |
1230 | gold_assert(!sym->has_symtab_index()); | |
1231 | sym->set_symtab_index(-1U); | |
1232 | gold_assert(sym->dynsym_index() == -1U); | |
1233 | continue; | |
1234 | } | |
1235 | ||
ead1e424 | 1236 | typename Sized_symbol<size>::Value_type value; |
75f65a3e | 1237 | |
ead1e424 | 1238 | switch (sym->source()) |
75f65a3e | 1239 | { |
ead1e424 ILT |
1240 | case Symbol::FROM_OBJECT: |
1241 | { | |
16649710 | 1242 | unsigned int shndx = sym->shndx(); |
ead1e424 ILT |
1243 | |
1244 | // FIXME: We need some target specific support here. | |
16649710 ILT |
1245 | if (shndx >= elfcpp::SHN_LORESERVE |
1246 | && shndx != elfcpp::SHN_ABS) | |
ead1e424 ILT |
1247 | { |
1248 | fprintf(stderr, _("%s: %s: unsupported symbol section 0x%x\n"), | |
16649710 | 1249 | program_name, sym->name(), shndx); |
ead1e424 ILT |
1250 | gold_exit(false); |
1251 | } | |
1252 | ||
f6ce93d6 ILT |
1253 | Object* symobj = sym->object(); |
1254 | if (symobj->is_dynamic()) | |
1255 | { | |
1256 | value = 0; | |
16649710 | 1257 | shndx = elfcpp::SHN_UNDEF; |
f6ce93d6 | 1258 | } |
16649710 | 1259 | else if (shndx == elfcpp::SHN_UNDEF) |
ead1e424 | 1260 | value = 0; |
16649710 | 1261 | else if (shndx == elfcpp::SHN_ABS) |
ead1e424 ILT |
1262 | value = sym->value(); |
1263 | else | |
1264 | { | |
f6ce93d6 | 1265 | Relobj* relobj = static_cast<Relobj*>(symobj); |
ead1e424 | 1266 | off_t secoff; |
16649710 | 1267 | Output_section* os = relobj->output_section(shndx, &secoff); |
ead1e424 ILT |
1268 | |
1269 | if (os == NULL) | |
1270 | { | |
c06b7b0b | 1271 | sym->set_symtab_index(-1U); |
16649710 | 1272 | gold_assert(sym->dynsym_index() == -1U); |
ead1e424 ILT |
1273 | continue; |
1274 | } | |
1275 | ||
1276 | value = sym->value() + os->address() + secoff; | |
1277 | } | |
1278 | } | |
1279 | break; | |
1280 | ||
1281 | case Symbol::IN_OUTPUT_DATA: | |
1282 | { | |
1283 | Output_data* od = sym->output_data(); | |
1284 | value = sym->value() + od->address(); | |
1285 | if (sym->offset_is_from_end()) | |
1286 | value += od->data_size(); | |
1287 | } | |
1288 | break; | |
1289 | ||
1290 | case Symbol::IN_OUTPUT_SEGMENT: | |
1291 | { | |
1292 | Output_segment* os = sym->output_segment(); | |
1293 | value = sym->value() + os->vaddr(); | |
1294 | switch (sym->offset_base()) | |
1295 | { | |
1296 | case Symbol::SEGMENT_START: | |
1297 | break; | |
1298 | case Symbol::SEGMENT_END: | |
1299 | value += os->memsz(); | |
1300 | break; | |
1301 | case Symbol::SEGMENT_BSS: | |
1302 | value += os->filesz(); | |
1303 | break; | |
1304 | default: | |
a3ad94ed | 1305 | gold_unreachable(); |
ead1e424 ILT |
1306 | } |
1307 | } | |
1308 | break; | |
1309 | ||
1310 | case Symbol::CONSTANT: | |
1311 | value = sym->value(); | |
1312 | break; | |
1313 | ||
1314 | default: | |
a3ad94ed | 1315 | gold_unreachable(); |
54dc6425 | 1316 | } |
ead1e424 ILT |
1317 | |
1318 | sym->set_value(value); | |
9e2dcb77 ILT |
1319 | |
1320 | if (parameters->strip_all()) | |
1321 | sym->set_symtab_index(-1U); | |
1322 | else | |
1323 | { | |
1324 | sym->set_symtab_index(index); | |
cfd73a4e | 1325 | pool->add(sym->name(), false, NULL); |
9e2dcb77 ILT |
1326 | ++index; |
1327 | off += sym_size; | |
1328 | } | |
54dc6425 | 1329 | } |
75f65a3e | 1330 | |
c06b7b0b | 1331 | this->output_count_ = index - orig_index; |
61ba1cf9 | 1332 | |
75f65a3e | 1333 | return off; |
54dc6425 ILT |
1334 | } |
1335 | ||
61ba1cf9 ILT |
1336 | // Write out the global symbols. |
1337 | ||
1338 | void | |
1339 | Symbol_table::write_globals(const Target* target, const Stringpool* sympool, | |
16649710 | 1340 | const Stringpool* dynpool, Output_file* of) const |
61ba1cf9 | 1341 | { |
9025d29d | 1342 | if (parameters->get_size() == 32) |
61ba1cf9 | 1343 | { |
9025d29d ILT |
1344 | if (parameters->is_big_endian()) |
1345 | { | |
1346 | #ifdef HAVE_TARGET_32_BIG | |
1347 | this->sized_write_globals<32, true>(target, sympool, dynpool, of); | |
1348 | #else | |
1349 | gold_unreachable(); | |
1350 | #endif | |
1351 | } | |
61ba1cf9 | 1352 | else |
9025d29d ILT |
1353 | { |
1354 | #ifdef HAVE_TARGET_32_LITTLE | |
1355 | this->sized_write_globals<32, false>(target, sympool, dynpool, of); | |
1356 | #else | |
1357 | gold_unreachable(); | |
1358 | #endif | |
1359 | } | |
61ba1cf9 | 1360 | } |
9025d29d | 1361 | else if (parameters->get_size() == 64) |
61ba1cf9 | 1362 | { |
9025d29d ILT |
1363 | if (parameters->is_big_endian()) |
1364 | { | |
1365 | #ifdef HAVE_TARGET_64_BIG | |
1366 | this->sized_write_globals<64, true>(target, sympool, dynpool, of); | |
1367 | #else | |
1368 | gold_unreachable(); | |
1369 | #endif | |
1370 | } | |
61ba1cf9 | 1371 | else |
9025d29d ILT |
1372 | { |
1373 | #ifdef HAVE_TARGET_64_LITTLE | |
1374 | this->sized_write_globals<64, false>(target, sympool, dynpool, of); | |
1375 | #else | |
1376 | gold_unreachable(); | |
1377 | #endif | |
1378 | } | |
61ba1cf9 ILT |
1379 | } |
1380 | else | |
a3ad94ed | 1381 | gold_unreachable(); |
61ba1cf9 ILT |
1382 | } |
1383 | ||
1384 | // Write out the global symbols. | |
1385 | ||
1386 | template<int size, bool big_endian> | |
1387 | void | |
ab5c9e90 | 1388 | Symbol_table::sized_write_globals(const Target* target, |
61ba1cf9 | 1389 | const Stringpool* sympool, |
16649710 | 1390 | const Stringpool* dynpool, |
61ba1cf9 ILT |
1391 | Output_file* of) const |
1392 | { | |
1393 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
c06b7b0b ILT |
1394 | unsigned int index = this->first_global_index_; |
1395 | const off_t oview_size = this->output_count_ * sym_size; | |
16649710 ILT |
1396 | unsigned char* const psyms = of->get_output_view(this->offset_, oview_size); |
1397 | ||
1398 | unsigned int dynamic_count = this->dynamic_count_; | |
1399 | off_t dynamic_size = dynamic_count * sym_size; | |
1400 | unsigned int first_dynamic_global_index = this->first_dynamic_global_index_; | |
1401 | unsigned char* dynamic_view; | |
1402 | if (this->dynamic_offset_ == 0) | |
1403 | dynamic_view = NULL; | |
1404 | else | |
1405 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); | |
c06b7b0b | 1406 | |
61ba1cf9 ILT |
1407 | unsigned char* ps = psyms; |
1408 | for (Symbol_table_type::const_iterator p = this->table_.begin(); | |
1409 | p != this->table_.end(); | |
1410 | ++p) | |
1411 | { | |
1412 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); | |
1413 | ||
a3ad94ed | 1414 | unsigned int sym_index = sym->symtab_index(); |
16649710 ILT |
1415 | unsigned int dynsym_index; |
1416 | if (dynamic_view == NULL) | |
1417 | dynsym_index = -1U; | |
1418 | else | |
1419 | dynsym_index = sym->dynsym_index(); | |
1420 | ||
1421 | if (sym_index == -1U && dynsym_index == -1U) | |
a3ad94ed ILT |
1422 | { |
1423 | // This symbol is not included in the output file. | |
1424 | continue; | |
1425 | } | |
16649710 ILT |
1426 | |
1427 | if (sym_index == index) | |
1428 | ++index; | |
1429 | else if (sym_index != -1U) | |
a3ad94ed ILT |
1430 | { |
1431 | // We have already seen this symbol, because it has a | |
1432 | // default version. | |
1433 | gold_assert(sym_index < index); | |
16649710 ILT |
1434 | if (dynsym_index == -1U) |
1435 | continue; | |
1436 | sym_index = -1U; | |
a3ad94ed | 1437 | } |
c06b7b0b | 1438 | |
ead1e424 | 1439 | unsigned int shndx; |
ab5c9e90 | 1440 | typename elfcpp::Elf_types<32>::Elf_Addr value = sym->value(); |
ead1e424 ILT |
1441 | switch (sym->source()) |
1442 | { | |
1443 | case Symbol::FROM_OBJECT: | |
1444 | { | |
16649710 | 1445 | unsigned int in_shndx = sym->shndx(); |
ead1e424 ILT |
1446 | |
1447 | // FIXME: We need some target specific support here. | |
16649710 ILT |
1448 | if (in_shndx >= elfcpp::SHN_LORESERVE |
1449 | && in_shndx != elfcpp::SHN_ABS) | |
ead1e424 ILT |
1450 | { |
1451 | fprintf(stderr, _("%s: %s: unsupported symbol section 0x%x\n"), | |
16649710 | 1452 | program_name, sym->name(), in_shndx); |
ead1e424 ILT |
1453 | gold_exit(false); |
1454 | } | |
1455 | ||
f6ce93d6 ILT |
1456 | Object* symobj = sym->object(); |
1457 | if (symobj->is_dynamic()) | |
1458 | { | |
ab5c9e90 ILT |
1459 | if (sym->needs_dynsym_value()) |
1460 | value = target->dynsym_value(sym); | |
f6ce93d6 ILT |
1461 | shndx = elfcpp::SHN_UNDEF; |
1462 | } | |
16649710 ILT |
1463 | else if (in_shndx == elfcpp::SHN_UNDEF |
1464 | || in_shndx == elfcpp::SHN_ABS) | |
1465 | shndx = in_shndx; | |
ead1e424 ILT |
1466 | else |
1467 | { | |
f6ce93d6 | 1468 | Relobj* relobj = static_cast<Relobj*>(symobj); |
ead1e424 | 1469 | off_t secoff; |
16649710 | 1470 | Output_section* os = relobj->output_section(in_shndx, &secoff); |
a3ad94ed | 1471 | gold_assert(os != NULL); |
ead1e424 ILT |
1472 | shndx = os->out_shndx(); |
1473 | } | |
1474 | } | |
1475 | break; | |
1476 | ||
1477 | case Symbol::IN_OUTPUT_DATA: | |
1478 | shndx = sym->output_data()->out_shndx(); | |
1479 | break; | |
1480 | ||
1481 | case Symbol::IN_OUTPUT_SEGMENT: | |
1482 | shndx = elfcpp::SHN_ABS; | |
1483 | break; | |
1484 | ||
1485 | case Symbol::CONSTANT: | |
1486 | shndx = elfcpp::SHN_ABS; | |
1487 | break; | |
1488 | ||
1489 | default: | |
a3ad94ed | 1490 | gold_unreachable(); |
ead1e424 | 1491 | } |
61ba1cf9 | 1492 | |
16649710 ILT |
1493 | if (sym_index != -1U) |
1494 | { | |
6a469986 | 1495 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
ab5c9e90 | 1496 | sym, sym->value(), shndx, sympool, ps |
6a469986 | 1497 | SELECT_SIZE_ENDIAN(size, big_endian)); |
16649710 ILT |
1498 | ps += sym_size; |
1499 | } | |
61ba1cf9 | 1500 | |
16649710 ILT |
1501 | if (dynsym_index != -1U) |
1502 | { | |
1503 | dynsym_index -= first_dynamic_global_index; | |
1504 | gold_assert(dynsym_index < dynamic_count); | |
1505 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
6a469986 | 1506 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
ab5c9e90 | 1507 | sym, value, shndx, dynpool, pd |
6a469986 | 1508 | SELECT_SIZE_ENDIAN(size, big_endian)); |
16649710 | 1509 | } |
61ba1cf9 ILT |
1510 | } |
1511 | ||
a3ad94ed | 1512 | gold_assert(ps - psyms == oview_size); |
c06b7b0b ILT |
1513 | |
1514 | of->write_output_view(this->offset_, oview_size, psyms); | |
16649710 ILT |
1515 | if (dynamic_view != NULL) |
1516 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); | |
1517 | } | |
1518 | ||
1519 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the | |
1520 | // strtab holding the name. | |
1521 | ||
1522 | template<int size, bool big_endian> | |
1523 | void | |
ab5c9e90 ILT |
1524 | Symbol_table::sized_write_symbol( |
1525 | Sized_symbol<size>* sym, | |
1526 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
1527 | unsigned int shndx, | |
1528 | const Stringpool* pool, | |
1529 | unsigned char* p | |
1530 | ACCEPT_SIZE_ENDIAN) const | |
16649710 ILT |
1531 | { |
1532 | elfcpp::Sym_write<size, big_endian> osym(p); | |
1533 | osym.put_st_name(pool->get_offset(sym->name())); | |
ab5c9e90 | 1534 | osym.put_st_value(value); |
16649710 ILT |
1535 | osym.put_st_size(sym->symsize()); |
1536 | osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type())); | |
1537 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); | |
1538 | osym.put_st_shndx(shndx); | |
61ba1cf9 ILT |
1539 | } |
1540 | ||
a3ad94ed ILT |
1541 | // Write out a section symbol. Return the update offset. |
1542 | ||
1543 | void | |
9025d29d | 1544 | Symbol_table::write_section_symbol(const Output_section *os, |
a3ad94ed ILT |
1545 | Output_file* of, |
1546 | off_t offset) const | |
1547 | { | |
9025d29d | 1548 | if (parameters->get_size() == 32) |
a3ad94ed | 1549 | { |
9025d29d ILT |
1550 | if (parameters->is_big_endian()) |
1551 | { | |
1552 | #ifdef HAVE_TARGET_32_BIG | |
1553 | this->sized_write_section_symbol<32, true>(os, of, offset); | |
1554 | #else | |
1555 | gold_unreachable(); | |
1556 | #endif | |
1557 | } | |
a3ad94ed | 1558 | else |
9025d29d ILT |
1559 | { |
1560 | #ifdef HAVE_TARGET_32_LITTLE | |
1561 | this->sized_write_section_symbol<32, false>(os, of, offset); | |
1562 | #else | |
1563 | gold_unreachable(); | |
1564 | #endif | |
1565 | } | |
a3ad94ed | 1566 | } |
9025d29d | 1567 | else if (parameters->get_size() == 64) |
a3ad94ed | 1568 | { |
9025d29d ILT |
1569 | if (parameters->is_big_endian()) |
1570 | { | |
1571 | #ifdef HAVE_TARGET_64_BIG | |
1572 | this->sized_write_section_symbol<64, true>(os, of, offset); | |
1573 | #else | |
1574 | gold_unreachable(); | |
1575 | #endif | |
1576 | } | |
a3ad94ed | 1577 | else |
9025d29d ILT |
1578 | { |
1579 | #ifdef HAVE_TARGET_64_LITTLE | |
1580 | this->sized_write_section_symbol<64, false>(os, of, offset); | |
1581 | #else | |
1582 | gold_unreachable(); | |
1583 | #endif | |
1584 | } | |
a3ad94ed ILT |
1585 | } |
1586 | else | |
1587 | gold_unreachable(); | |
1588 | } | |
1589 | ||
1590 | // Write out a section symbol, specialized for size and endianness. | |
1591 | ||
1592 | template<int size, bool big_endian> | |
1593 | void | |
1594 | Symbol_table::sized_write_section_symbol(const Output_section* os, | |
1595 | Output_file* of, | |
1596 | off_t offset) const | |
1597 | { | |
1598 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1599 | ||
1600 | unsigned char* pov = of->get_output_view(offset, sym_size); | |
1601 | ||
1602 | elfcpp::Sym_write<size, big_endian> osym(pov); | |
1603 | osym.put_st_name(0); | |
1604 | osym.put_st_value(os->address()); | |
1605 | osym.put_st_size(0); | |
1606 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, | |
1607 | elfcpp::STT_SECTION)); | |
1608 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); | |
1609 | osym.put_st_shndx(os->out_shndx()); | |
1610 | ||
1611 | of->write_output_view(offset, sym_size, pov); | |
1612 | } | |
1613 | ||
f6ce93d6 ILT |
1614 | // Warnings functions. |
1615 | ||
1616 | // Add a new warning. | |
1617 | ||
1618 | void | |
1619 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, | |
1620 | unsigned int shndx) | |
1621 | { | |
1622 | name = symtab->canonicalize_name(name); | |
1623 | this->warnings_[name].set(obj, shndx); | |
1624 | } | |
1625 | ||
1626 | // Look through the warnings and mark the symbols for which we should | |
1627 | // warn. This is called during Layout::finalize when we know the | |
1628 | // sources for all the symbols. | |
1629 | ||
1630 | void | |
1631 | Warnings::note_warnings(Symbol_table* symtab) | |
1632 | { | |
1633 | for (Warning_table::iterator p = this->warnings_.begin(); | |
1634 | p != this->warnings_.end(); | |
1635 | ++p) | |
1636 | { | |
1637 | Symbol* sym = symtab->lookup(p->first, NULL); | |
1638 | if (sym != NULL | |
1639 | && sym->source() == Symbol::FROM_OBJECT | |
1640 | && sym->object() == p->second.object) | |
1641 | { | |
1642 | sym->set_has_warning(); | |
1643 | ||
1644 | // Read the section contents to get the warning text. It | |
1645 | // would be nicer if we only did this if we have to actually | |
1646 | // issue a warning. Unfortunately, warnings are issued as | |
1647 | // we relocate sections. That means that we can not lock | |
1648 | // the object then, as we might try to issue the same | |
1649 | // warning multiple times simultaneously. | |
645f8123 ILT |
1650 | { |
1651 | Task_locker_obj<Object> tl(*p->second.object); | |
1652 | const unsigned char* c; | |
1653 | off_t len; | |
9eb9fa57 ILT |
1654 | c = p->second.object->section_contents(p->second.shndx, &len, |
1655 | false); | |
645f8123 ILT |
1656 | p->second.set_text(reinterpret_cast<const char*>(c), len); |
1657 | } | |
f6ce93d6 ILT |
1658 | } |
1659 | } | |
1660 | } | |
1661 | ||
1662 | // Issue a warning. This is called when we see a relocation against a | |
1663 | // symbol for which has a warning. | |
1664 | ||
1665 | void | |
c06b7b0b | 1666 | Warnings::issue_warning(const Symbol* sym, const std::string& location) const |
f6ce93d6 | 1667 | { |
a3ad94ed | 1668 | gold_assert(sym->has_warning()); |
f6ce93d6 | 1669 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
a3ad94ed | 1670 | gold_assert(p != this->warnings_.end()); |
f6ce93d6 ILT |
1671 | fprintf(stderr, _("%s: %s: warning: %s\n"), program_name, location.c_str(), |
1672 | p->second.text.c_str()); | |
1673 | } | |
1674 | ||
14bfc3f5 ILT |
1675 | // Instantiate the templates we need. We could use the configure |
1676 | // script to restrict this to only the ones needed for implemented | |
1677 | // targets. | |
1678 | ||
193a53d9 | 1679 | #ifdef HAVE_TARGET_32_LITTLE |
14bfc3f5 ILT |
1680 | template |
1681 | void | |
193a53d9 ILT |
1682 | Symbol_table::add_from_relobj<32, false>( |
1683 | Sized_relobj<32, false>* relobj, | |
f6ce93d6 | 1684 | const unsigned char* syms, |
14bfc3f5 ILT |
1685 | size_t count, |
1686 | const char* sym_names, | |
1687 | size_t sym_name_size, | |
1688 | Symbol** sympointers); | |
193a53d9 | 1689 | #endif |
14bfc3f5 | 1690 | |
193a53d9 | 1691 | #ifdef HAVE_TARGET_32_BIG |
14bfc3f5 ILT |
1692 | template |
1693 | void | |
193a53d9 ILT |
1694 | Symbol_table::add_from_relobj<32, true>( |
1695 | Sized_relobj<32, true>* relobj, | |
f6ce93d6 | 1696 | const unsigned char* syms, |
14bfc3f5 ILT |
1697 | size_t count, |
1698 | const char* sym_names, | |
1699 | size_t sym_name_size, | |
1700 | Symbol** sympointers); | |
193a53d9 | 1701 | #endif |
14bfc3f5 | 1702 | |
193a53d9 | 1703 | #ifdef HAVE_TARGET_64_LITTLE |
14bfc3f5 ILT |
1704 | template |
1705 | void | |
193a53d9 ILT |
1706 | Symbol_table::add_from_relobj<64, false>( |
1707 | Sized_relobj<64, false>* relobj, | |
f6ce93d6 | 1708 | const unsigned char* syms, |
14bfc3f5 ILT |
1709 | size_t count, |
1710 | const char* sym_names, | |
1711 | size_t sym_name_size, | |
1712 | Symbol** sympointers); | |
193a53d9 | 1713 | #endif |
14bfc3f5 | 1714 | |
193a53d9 | 1715 | #ifdef HAVE_TARGET_64_BIG |
14bfc3f5 ILT |
1716 | template |
1717 | void | |
193a53d9 ILT |
1718 | Symbol_table::add_from_relobj<64, true>( |
1719 | Sized_relobj<64, true>* relobj, | |
f6ce93d6 | 1720 | const unsigned char* syms, |
14bfc3f5 ILT |
1721 | size_t count, |
1722 | const char* sym_names, | |
1723 | size_t sym_name_size, | |
1724 | Symbol** sympointers); | |
193a53d9 | 1725 | #endif |
14bfc3f5 | 1726 | |
193a53d9 | 1727 | #ifdef HAVE_TARGET_32_LITTLE |
dbe717ef ILT |
1728 | template |
1729 | void | |
193a53d9 ILT |
1730 | Symbol_table::add_from_dynobj<32, false>( |
1731 | Sized_dynobj<32, false>* dynobj, | |
dbe717ef ILT |
1732 | const unsigned char* syms, |
1733 | size_t count, | |
1734 | const char* sym_names, | |
1735 | size_t sym_name_size, | |
1736 | const unsigned char* versym, | |
1737 | size_t versym_size, | |
1738 | const std::vector<const char*>* version_map); | |
193a53d9 | 1739 | #endif |
dbe717ef | 1740 | |
193a53d9 | 1741 | #ifdef HAVE_TARGET_32_BIG |
dbe717ef ILT |
1742 | template |
1743 | void | |
193a53d9 ILT |
1744 | Symbol_table::add_from_dynobj<32, true>( |
1745 | Sized_dynobj<32, true>* dynobj, | |
dbe717ef ILT |
1746 | const unsigned char* syms, |
1747 | size_t count, | |
1748 | const char* sym_names, | |
1749 | size_t sym_name_size, | |
1750 | const unsigned char* versym, | |
1751 | size_t versym_size, | |
1752 | const std::vector<const char*>* version_map); | |
193a53d9 | 1753 | #endif |
dbe717ef | 1754 | |
193a53d9 | 1755 | #ifdef HAVE_TARGET_64_LITTLE |
dbe717ef ILT |
1756 | template |
1757 | void | |
193a53d9 ILT |
1758 | Symbol_table::add_from_dynobj<64, false>( |
1759 | Sized_dynobj<64, false>* dynobj, | |
dbe717ef ILT |
1760 | const unsigned char* syms, |
1761 | size_t count, | |
1762 | const char* sym_names, | |
1763 | size_t sym_name_size, | |
1764 | const unsigned char* versym, | |
1765 | size_t versym_size, | |
1766 | const std::vector<const char*>* version_map); | |
193a53d9 | 1767 | #endif |
dbe717ef | 1768 | |
193a53d9 | 1769 | #ifdef HAVE_TARGET_64_BIG |
dbe717ef ILT |
1770 | template |
1771 | void | |
193a53d9 ILT |
1772 | Symbol_table::add_from_dynobj<64, true>( |
1773 | Sized_dynobj<64, true>* dynobj, | |
dbe717ef ILT |
1774 | const unsigned char* syms, |
1775 | size_t count, | |
1776 | const char* sym_names, | |
1777 | size_t sym_name_size, | |
1778 | const unsigned char* versym, | |
1779 | size_t versym_size, | |
1780 | const std::vector<const char*>* version_map); | |
193a53d9 | 1781 | #endif |
dbe717ef | 1782 | |
14bfc3f5 | 1783 | } // End namespace gold. |