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14bfc3f5 ILT |
1 | // symtab.cc -- the gold symbol table |
2 | ||
e5756efb | 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
6cb15b7f ILT |
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 | 25 | #include <stdint.h> |
70e654ba | 26 | #include <set> |
14bfc3f5 ILT |
27 | #include <string> |
28 | #include <utility> | |
a2b1aa12 | 29 | #include "demangle.h" |
14bfc3f5 ILT |
30 | |
31 | #include "object.h" | |
70e654ba | 32 | #include "dwarf_reader.h" |
dbe717ef | 33 | #include "dynobj.h" |
75f65a3e | 34 | #include "output.h" |
61ba1cf9 | 35 | #include "target.h" |
645f8123 | 36 | #include "workqueue.h" |
14bfc3f5 ILT |
37 | #include "symtab.h" |
38 | ||
39 | namespace gold | |
40 | { | |
41 | ||
42 | // Class Symbol. | |
43 | ||
ead1e424 ILT |
44 | // Initialize fields in Symbol. This initializes everything except u_ |
45 | // and source_. | |
14bfc3f5 | 46 | |
14bfc3f5 | 47 | void |
ead1e424 ILT |
48 | Symbol::init_fields(const char* name, const char* version, |
49 | elfcpp::STT type, elfcpp::STB binding, | |
50 | elfcpp::STV visibility, unsigned char nonvis) | |
14bfc3f5 ILT |
51 | { |
52 | this->name_ = name; | |
53 | this->version_ = version; | |
c06b7b0b ILT |
54 | this->symtab_index_ = 0; |
55 | this->dynsym_index_ = 0; | |
ead1e424 | 56 | this->got_offset_ = 0; |
f4151f89 | 57 | this->plt_offset_ = 0; |
ead1e424 ILT |
58 | this->type_ = type; |
59 | this->binding_ = binding; | |
60 | this->visibility_ = visibility; | |
61 | this->nonvis_ = nonvis; | |
62 | this->is_target_special_ = false; | |
1564db8d ILT |
63 | this->is_def_ = false; |
64 | this->is_forwarder_ = false; | |
aeddab66 | 65 | this->has_alias_ = false; |
c06b7b0b | 66 | this->needs_dynsym_entry_ = false; |
008db82e | 67 | this->in_reg_ = false; |
ead1e424 ILT |
68 | this->in_dyn_ = false; |
69 | this->has_got_offset_ = false; | |
f4151f89 | 70 | this->has_plt_offset_ = false; |
f6ce93d6 | 71 | this->has_warning_ = false; |
46fe1623 | 72 | this->is_copied_from_dynobj_ = false; |
ead1e424 ILT |
73 | } |
74 | ||
a2b1aa12 ILT |
75 | // Return the demangled version of the symbol's name, but only |
76 | // if the --demangle flag was set. | |
77 | ||
78 | static std::string | |
79 | demangle(const char* name) | |
80 | { | |
ff541f30 ILT |
81 | if (!parameters->demangle()) |
82 | return name; | |
83 | ||
a2b1aa12 ILT |
84 | // cplus_demangle allocates memory for the result it returns, |
85 | // and returns NULL if the name is already demangled. | |
86 | char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS); | |
87 | if (demangled_name == NULL) | |
88 | return name; | |
89 | ||
90 | std::string retval(demangled_name); | |
91 | free(demangled_name); | |
92 | return retval; | |
93 | } | |
94 | ||
95 | std::string | |
96 | Symbol::demangled_name() const | |
97 | { | |
ff541f30 | 98 | return demangle(this->name()); |
a2b1aa12 ILT |
99 | } |
100 | ||
ead1e424 ILT |
101 | // Initialize the fields in the base class Symbol for SYM in OBJECT. |
102 | ||
103 | template<int size, bool big_endian> | |
104 | void | |
105 | Symbol::init_base(const char* name, const char* version, Object* object, | |
106 | const elfcpp::Sym<size, big_endian>& sym) | |
107 | { | |
108 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), | |
109 | sym.get_st_visibility(), sym.get_st_nonvis()); | |
110 | this->u_.from_object.object = object; | |
111 | // FIXME: Handle SHN_XINDEX. | |
16649710 | 112 | this->u_.from_object.shndx = sym.get_st_shndx(); |
ead1e424 | 113 | this->source_ = FROM_OBJECT; |
008db82e | 114 | this->in_reg_ = !object->is_dynamic(); |
1564db8d | 115 | this->in_dyn_ = object->is_dynamic(); |
14bfc3f5 ILT |
116 | } |
117 | ||
ead1e424 ILT |
118 | // Initialize the fields in the base class Symbol for a symbol defined |
119 | // in an Output_data. | |
120 | ||
121 | void | |
122 | Symbol::init_base(const char* name, Output_data* od, elfcpp::STT type, | |
123 | elfcpp::STB binding, elfcpp::STV visibility, | |
124 | unsigned char nonvis, bool offset_is_from_end) | |
125 | { | |
126 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
127 | this->u_.in_output_data.output_data = od; | |
128 | this->u_.in_output_data.offset_is_from_end = offset_is_from_end; | |
129 | this->source_ = IN_OUTPUT_DATA; | |
008db82e | 130 | this->in_reg_ = true; |
ead1e424 ILT |
131 | } |
132 | ||
133 | // Initialize the fields in the base class Symbol for a symbol defined | |
134 | // in an Output_segment. | |
135 | ||
136 | void | |
137 | Symbol::init_base(const char* name, Output_segment* os, elfcpp::STT type, | |
138 | elfcpp::STB binding, elfcpp::STV visibility, | |
139 | unsigned char nonvis, Segment_offset_base offset_base) | |
140 | { | |
141 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
142 | this->u_.in_output_segment.output_segment = os; | |
143 | this->u_.in_output_segment.offset_base = offset_base; | |
144 | this->source_ = IN_OUTPUT_SEGMENT; | |
008db82e | 145 | this->in_reg_ = true; |
ead1e424 ILT |
146 | } |
147 | ||
148 | // Initialize the fields in the base class Symbol for a symbol defined | |
149 | // as a constant. | |
150 | ||
151 | void | |
152 | Symbol::init_base(const char* name, elfcpp::STT type, | |
153 | elfcpp::STB binding, elfcpp::STV visibility, | |
154 | unsigned char nonvis) | |
155 | { | |
156 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
157 | this->source_ = CONSTANT; | |
008db82e | 158 | this->in_reg_ = true; |
ead1e424 ILT |
159 | } |
160 | ||
c7912668 ILT |
161 | // Allocate a common symbol in the base. |
162 | ||
163 | void | |
164 | Symbol::allocate_base_common(Output_data* od) | |
165 | { | |
166 | gold_assert(this->is_common()); | |
167 | this->source_ = IN_OUTPUT_DATA; | |
168 | this->u_.in_output_data.output_data = od; | |
169 | this->u_.in_output_data.offset_is_from_end = false; | |
170 | } | |
171 | ||
ead1e424 | 172 | // Initialize the fields in Sized_symbol for SYM in OBJECT. |
14bfc3f5 ILT |
173 | |
174 | template<int size> | |
175 | template<bool big_endian> | |
176 | void | |
177 | Sized_symbol<size>::init(const char* name, const char* version, Object* object, | |
178 | const elfcpp::Sym<size, big_endian>& sym) | |
179 | { | |
180 | this->init_base(name, version, object, sym); | |
181 | this->value_ = sym.get_st_value(); | |
ead1e424 ILT |
182 | this->symsize_ = sym.get_st_size(); |
183 | } | |
184 | ||
185 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
186 | // Output_data. | |
187 | ||
188 | template<int size> | |
189 | void | |
190 | Sized_symbol<size>::init(const char* name, Output_data* od, | |
191 | Value_type value, Size_type symsize, | |
192 | elfcpp::STT type, elfcpp::STB binding, | |
193 | elfcpp::STV visibility, unsigned char nonvis, | |
194 | bool offset_is_from_end) | |
195 | { | |
196 | this->init_base(name, od, type, binding, visibility, nonvis, | |
197 | offset_is_from_end); | |
198 | this->value_ = value; | |
199 | this->symsize_ = symsize; | |
200 | } | |
201 | ||
202 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
203 | // Output_segment. | |
204 | ||
205 | template<int size> | |
206 | void | |
207 | Sized_symbol<size>::init(const char* name, Output_segment* os, | |
208 | Value_type value, Size_type symsize, | |
209 | elfcpp::STT type, elfcpp::STB binding, | |
210 | elfcpp::STV visibility, unsigned char nonvis, | |
211 | Segment_offset_base offset_base) | |
212 | { | |
213 | this->init_base(name, os, type, binding, visibility, nonvis, offset_base); | |
214 | this->value_ = value; | |
215 | this->symsize_ = symsize; | |
216 | } | |
217 | ||
218 | // Initialize the fields in Sized_symbol for a symbol defined as a | |
219 | // constant. | |
220 | ||
221 | template<int size> | |
222 | void | |
223 | Sized_symbol<size>::init(const char* name, Value_type value, Size_type symsize, | |
224 | elfcpp::STT type, elfcpp::STB binding, | |
225 | elfcpp::STV visibility, unsigned char nonvis) | |
226 | { | |
227 | this->init_base(name, type, binding, visibility, nonvis); | |
228 | this->value_ = value; | |
229 | this->symsize_ = symsize; | |
14bfc3f5 ILT |
230 | } |
231 | ||
c7912668 ILT |
232 | // Allocate a common symbol. |
233 | ||
234 | template<int size> | |
235 | void | |
236 | Sized_symbol<size>::allocate_common(Output_data* od, Value_type value) | |
237 | { | |
238 | this->allocate_base_common(od); | |
239 | this->value_ = value; | |
240 | } | |
241 | ||
436ca963 ILT |
242 | // Return true if this symbol should be added to the dynamic symbol |
243 | // table. | |
244 | ||
245 | inline bool | |
246 | Symbol::should_add_dynsym_entry() const | |
247 | { | |
248 | // If the symbol is used by a dynamic relocation, we need to add it. | |
249 | if (this->needs_dynsym_entry()) | |
250 | return true; | |
251 | ||
252 | // If exporting all symbols or building a shared library, | |
253 | // and the symbol is defined in a regular object and is | |
254 | // externally visible, we need to add it. | |
255 | if ((parameters->export_dynamic() || parameters->output_is_shared()) | |
256 | && !this->is_from_dynobj() | |
257 | && this->is_externally_visible()) | |
258 | return true; | |
259 | ||
260 | return false; | |
261 | } | |
262 | ||
b3b74ddc ILT |
263 | // Return true if the final value of this symbol is known at link |
264 | // time. | |
265 | ||
266 | bool | |
267 | Symbol::final_value_is_known() const | |
268 | { | |
269 | // If we are not generating an executable, then no final values are | |
270 | // known, since they will change at runtime. | |
271 | if (!parameters->output_is_executable()) | |
272 | return false; | |
273 | ||
274 | // If the symbol is not from an object file, then it is defined, and | |
275 | // known. | |
276 | if (this->source_ != FROM_OBJECT) | |
277 | return true; | |
278 | ||
279 | // If the symbol is from a dynamic object, then the final value is | |
280 | // not known. | |
281 | if (this->object()->is_dynamic()) | |
282 | return false; | |
283 | ||
284 | // If the symbol is not undefined (it is defined or common), then | |
285 | // the final value is known. | |
286 | if (!this->is_undefined()) | |
287 | return true; | |
288 | ||
289 | // If the symbol is undefined, then whether the final value is known | |
290 | // depends on whether we are doing a static link. If we are doing a | |
291 | // dynamic link, then the final value could be filled in at runtime. | |
292 | // This could reasonably be the case for a weak undefined symbol. | |
293 | return parameters->doing_static_link(); | |
294 | } | |
295 | ||
14bfc3f5 ILT |
296 | // Class Symbol_table. |
297 | ||
09124467 ILT |
298 | Symbol_table::Symbol_table(unsigned int count, |
299 | const Version_script_info& version_script) | |
6d013333 | 300 | : saw_undefined_(0), offset_(0), table_(count), namepool_(), |
09124467 | 301 | forwarders_(), commons_(), warnings_(), version_script_(version_script) |
14bfc3f5 | 302 | { |
6d013333 | 303 | namepool_.reserve(count); |
14bfc3f5 ILT |
304 | } |
305 | ||
306 | Symbol_table::~Symbol_table() | |
307 | { | |
308 | } | |
309 | ||
ad8f37d1 | 310 | // The hash function. The key values are Stringpool keys. |
14bfc3f5 | 311 | |
ad8f37d1 | 312 | inline size_t |
14bfc3f5 ILT |
313 | Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const |
314 | { | |
f0641a0b | 315 | return key.first ^ key.second; |
14bfc3f5 ILT |
316 | } |
317 | ||
ad8f37d1 ILT |
318 | // The symbol table key equality function. This is called with |
319 | // Stringpool keys. | |
14bfc3f5 | 320 | |
ad8f37d1 | 321 | inline bool |
14bfc3f5 ILT |
322 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, |
323 | const Symbol_table_key& k2) const | |
324 | { | |
325 | return k1.first == k2.first && k1.second == k2.second; | |
326 | } | |
327 | ||
dd8670e5 | 328 | // Make TO a symbol which forwards to FROM. |
14bfc3f5 ILT |
329 | |
330 | void | |
331 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) | |
332 | { | |
a3ad94ed ILT |
333 | gold_assert(from != to); |
334 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); | |
14bfc3f5 ILT |
335 | this->forwarders_[from] = to; |
336 | from->set_forwarder(); | |
337 | } | |
338 | ||
61ba1cf9 ILT |
339 | // Resolve the forwards from FROM, returning the real symbol. |
340 | ||
14bfc3f5 | 341 | Symbol* |
c06b7b0b | 342 | Symbol_table::resolve_forwards(const Symbol* from) const |
14bfc3f5 | 343 | { |
a3ad94ed | 344 | gold_assert(from->is_forwarder()); |
c06b7b0b | 345 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
14bfc3f5 | 346 | this->forwarders_.find(from); |
a3ad94ed | 347 | gold_assert(p != this->forwarders_.end()); |
14bfc3f5 ILT |
348 | return p->second; |
349 | } | |
350 | ||
61ba1cf9 ILT |
351 | // Look up a symbol by name. |
352 | ||
353 | Symbol* | |
354 | Symbol_table::lookup(const char* name, const char* version) const | |
355 | { | |
f0641a0b ILT |
356 | Stringpool::Key name_key; |
357 | name = this->namepool_.find(name, &name_key); | |
61ba1cf9 ILT |
358 | if (name == NULL) |
359 | return NULL; | |
f0641a0b ILT |
360 | |
361 | Stringpool::Key version_key = 0; | |
61ba1cf9 ILT |
362 | if (version != NULL) |
363 | { | |
f0641a0b | 364 | version = this->namepool_.find(version, &version_key); |
61ba1cf9 ILT |
365 | if (version == NULL) |
366 | return NULL; | |
367 | } | |
368 | ||
f0641a0b | 369 | Symbol_table_key key(name_key, version_key); |
61ba1cf9 ILT |
370 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
371 | if (p == this->table_.end()) | |
372 | return NULL; | |
373 | return p->second; | |
374 | } | |
375 | ||
14bfc3f5 ILT |
376 | // Resolve a Symbol with another Symbol. This is only used in the |
377 | // unusual case where there are references to both an unversioned | |
378 | // symbol and a symbol with a version, and we then discover that that | |
1564db8d ILT |
379 | // version is the default version. Because this is unusual, we do |
380 | // this the slow way, by converting back to an ELF symbol. | |
14bfc3f5 | 381 | |
1564db8d | 382 | template<int size, bool big_endian> |
14bfc3f5 | 383 | void |
14b31740 ILT |
384 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from, |
385 | const char* version ACCEPT_SIZE_ENDIAN) | |
14bfc3f5 | 386 | { |
1564db8d ILT |
387 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
388 | elfcpp::Sym_write<size, big_endian> esym(buf); | |
389 | // We don't bother to set the st_name field. | |
390 | esym.put_st_value(from->value()); | |
391 | esym.put_st_size(from->symsize()); | |
392 | esym.put_st_info(from->binding(), from->type()); | |
ead1e424 | 393 | esym.put_st_other(from->visibility(), from->nonvis()); |
16649710 | 394 | esym.put_st_shndx(from->shndx()); |
70e654ba | 395 | this->resolve(to, esym.sym(), esym.sym(), from->object(), version); |
1ebd95fd ILT |
396 | if (from->in_reg()) |
397 | to->set_in_reg(); | |
398 | if (from->in_dyn()) | |
399 | to->set_in_dyn(); | |
14bfc3f5 ILT |
400 | } |
401 | ||
402 | // Add one symbol from OBJECT to the symbol table. NAME is symbol | |
403 | // name and VERSION is the version; both are canonicalized. DEF is | |
404 | // whether this is the default version. | |
405 | ||
406 | // If DEF is true, then this is the definition of a default version of | |
407 | // a symbol. That means that any lookup of NAME/NULL and any lookup | |
408 | // of NAME/VERSION should always return the same symbol. This is | |
409 | // obvious for references, but in particular we want to do this for | |
410 | // definitions: overriding NAME/NULL should also override | |
411 | // NAME/VERSION. If we don't do that, it would be very hard to | |
412 | // override functions in a shared library which uses versioning. | |
413 | ||
414 | // We implement this by simply making both entries in the hash table | |
415 | // point to the same Symbol structure. That is easy enough if this is | |
416 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible | |
417 | // that we have seen both already, in which case they will both have | |
418 | // independent entries in the symbol table. We can't simply change | |
419 | // the symbol table entry, because we have pointers to the entries | |
420 | // attached to the object files. So we mark the entry attached to the | |
421 | // object file as a forwarder, and record it in the forwarders_ map. | |
422 | // Note that entries in the hash table will never be marked as | |
423 | // forwarders. | |
70e654ba ILT |
424 | // |
425 | // SYM and ORIG_SYM are almost always the same. ORIG_SYM is the | |
426 | // symbol exactly as it existed in the input file. SYM is usually | |
427 | // that as well, but can be modified, for instance if we determine | |
428 | // it's in a to-be-discarded section. | |
14bfc3f5 ILT |
429 | |
430 | template<int size, bool big_endian> | |
aeddab66 | 431 | Sized_symbol<size>* |
f6ce93d6 | 432 | Symbol_table::add_from_object(Object* object, |
14bfc3f5 | 433 | const char *name, |
f0641a0b ILT |
434 | Stringpool::Key name_key, |
435 | const char *version, | |
436 | Stringpool::Key version_key, | |
437 | bool def, | |
70e654ba ILT |
438 | const elfcpp::Sym<size, big_endian>& sym, |
439 | const elfcpp::Sym<size, big_endian>& orig_sym) | |
14bfc3f5 ILT |
440 | { |
441 | Symbol* const snull = NULL; | |
442 | std::pair<typename Symbol_table_type::iterator, bool> ins = | |
f0641a0b ILT |
443 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
444 | snull)); | |
14bfc3f5 ILT |
445 | |
446 | std::pair<typename Symbol_table_type::iterator, bool> insdef = | |
447 | std::make_pair(this->table_.end(), false); | |
448 | if (def) | |
449 | { | |
f0641a0b ILT |
450 | const Stringpool::Key vnull_key = 0; |
451 | insdef = this->table_.insert(std::make_pair(std::make_pair(name_key, | |
452 | vnull_key), | |
14bfc3f5 ILT |
453 | snull)); |
454 | } | |
455 | ||
456 | // ins.first: an iterator, which is a pointer to a pair. | |
457 | // ins.first->first: the key (a pair of name and version). | |
458 | // ins.first->second: the value (Symbol*). | |
459 | // ins.second: true if new entry was inserted, false if not. | |
460 | ||
1564db8d | 461 | Sized_symbol<size>* ret; |
ead1e424 ILT |
462 | bool was_undefined; |
463 | bool was_common; | |
14bfc3f5 ILT |
464 | if (!ins.second) |
465 | { | |
466 | // We already have an entry for NAME/VERSION. | |
593f47df ILT |
467 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (ins.first->second |
468 | SELECT_SIZE(size)); | |
a3ad94ed | 469 | gold_assert(ret != NULL); |
ead1e424 ILT |
470 | |
471 | was_undefined = ret->is_undefined(); | |
472 | was_common = ret->is_common(); | |
473 | ||
70e654ba | 474 | this->resolve(ret, sym, orig_sym, object, version); |
14bfc3f5 ILT |
475 | |
476 | if (def) | |
477 | { | |
478 | if (insdef.second) | |
479 | { | |
480 | // This is the first time we have seen NAME/NULL. Make | |
481 | // NAME/NULL point to NAME/VERSION. | |
482 | insdef.first->second = ret; | |
483 | } | |
99f8faca ILT |
484 | else if (insdef.first->second != ret |
485 | && insdef.first->second->is_undefined()) | |
14bfc3f5 ILT |
486 | { |
487 | // This is the unfortunate case where we already have | |
99f8faca ILT |
488 | // entries for both NAME/VERSION and NAME/NULL. Note |
489 | // that we don't want to combine them if the existing | |
490 | // symbol is going to override the new one. FIXME: We | |
491 | // currently just test is_undefined, but this may not do | |
492 | // the right thing if the existing symbol is from a | |
493 | // shared library and the new one is from a regular | |
494 | // object. | |
495 | ||
274e99f9 | 496 | const Sized_symbol<size>* sym2; |
593f47df | 497 | sym2 = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d ILT |
498 | insdef.first->second |
499 | SELECT_SIZE(size)); | |
593f47df | 500 | Symbol_table::resolve SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
14b31740 | 501 | ret, sym2, version SELECT_SIZE_ENDIAN(size, big_endian)); |
14bfc3f5 ILT |
502 | this->make_forwarder(insdef.first->second, ret); |
503 | insdef.first->second = ret; | |
504 | } | |
505 | } | |
506 | } | |
507 | else | |
508 | { | |
509 | // This is the first time we have seen NAME/VERSION. | |
a3ad94ed | 510 | gold_assert(ins.first->second == NULL); |
ead1e424 ILT |
511 | |
512 | was_undefined = false; | |
513 | was_common = false; | |
514 | ||
14bfc3f5 ILT |
515 | if (def && !insdef.second) |
516 | { | |
14b31740 ILT |
517 | // We already have an entry for NAME/NULL. If we override |
518 | // it, then change it to NAME/VERSION. | |
593f47df ILT |
519 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
520 | insdef.first->second | |
521 | SELECT_SIZE(size)); | |
70e654ba | 522 | this->resolve(ret, sym, orig_sym, object, version); |
14bfc3f5 ILT |
523 | ins.first->second = ret; |
524 | } | |
525 | else | |
526 | { | |
f6ce93d6 ILT |
527 | Sized_target<size, big_endian>* target = |
528 | object->sized_target SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
529 | SELECT_SIZE_ENDIAN_ONLY(size, big_endian)); | |
1564db8d ILT |
530 | if (!target->has_make_symbol()) |
531 | ret = new Sized_symbol<size>(); | |
532 | else | |
14bfc3f5 | 533 | { |
1564db8d ILT |
534 | ret = target->make_symbol(); |
535 | if (ret == NULL) | |
14bfc3f5 ILT |
536 | { |
537 | // This means that we don't want a symbol table | |
538 | // entry after all. | |
539 | if (!def) | |
540 | this->table_.erase(ins.first); | |
541 | else | |
542 | { | |
543 | this->table_.erase(insdef.first); | |
544 | // Inserting insdef invalidated ins. | |
f0641a0b ILT |
545 | this->table_.erase(std::make_pair(name_key, |
546 | version_key)); | |
14bfc3f5 ILT |
547 | } |
548 | return NULL; | |
549 | } | |
550 | } | |
14bfc3f5 | 551 | |
1564db8d ILT |
552 | ret->init(name, version, object, sym); |
553 | ||
14bfc3f5 ILT |
554 | ins.first->second = ret; |
555 | if (def) | |
556 | { | |
557 | // This is the first time we have seen NAME/NULL. Point | |
558 | // it at the new entry for NAME/VERSION. | |
a3ad94ed | 559 | gold_assert(insdef.second); |
14bfc3f5 ILT |
560 | insdef.first->second = ret; |
561 | } | |
562 | } | |
563 | } | |
564 | ||
ead1e424 ILT |
565 | // Record every time we see a new undefined symbol, to speed up |
566 | // archive groups. | |
567 | if (!was_undefined && ret->is_undefined()) | |
568 | ++this->saw_undefined_; | |
569 | ||
570 | // Keep track of common symbols, to speed up common symbol | |
571 | // allocation. | |
572 | if (!was_common && ret->is_common()) | |
573 | this->commons_.push_back(ret); | |
574 | ||
09124467 | 575 | ret->set_is_default(def); |
14bfc3f5 ILT |
576 | return ret; |
577 | } | |
578 | ||
f6ce93d6 | 579 | // Add all the symbols in a relocatable object to the hash table. |
14bfc3f5 ILT |
580 | |
581 | template<int size, bool big_endian> | |
582 | void | |
dbe717ef ILT |
583 | Symbol_table::add_from_relobj( |
584 | Sized_relobj<size, big_endian>* relobj, | |
f6ce93d6 | 585 | const unsigned char* syms, |
14bfc3f5 ILT |
586 | size_t count, |
587 | const char* sym_names, | |
588 | size_t sym_name_size, | |
730cdc88 | 589 | typename Sized_relobj<size, big_endian>::Symbols* sympointers) |
14bfc3f5 | 590 | { |
9025d29d ILT |
591 | gold_assert(size == relobj->target()->get_size()); |
592 | gold_assert(size == parameters->get_size()); | |
14bfc3f5 | 593 | |
a783673b ILT |
594 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
595 | ||
f6ce93d6 | 596 | const unsigned char* p = syms; |
a783673b | 597 | for (size_t i = 0; i < count; ++i, p += sym_size) |
14bfc3f5 ILT |
598 | { |
599 | elfcpp::Sym<size, big_endian> sym(p); | |
a783673b | 600 | elfcpp::Sym<size, big_endian>* psym = &sym; |
14bfc3f5 | 601 | |
a783673b | 602 | unsigned int st_name = psym->get_st_name(); |
14bfc3f5 ILT |
603 | if (st_name >= sym_name_size) |
604 | { | |
75f2446e ILT |
605 | relobj->error(_("bad global symbol name offset %u at %zu"), |
606 | st_name, i); | |
607 | continue; | |
14bfc3f5 ILT |
608 | } |
609 | ||
dbe717ef ILT |
610 | const char* name = sym_names + st_name; |
611 | ||
a783673b ILT |
612 | // A symbol defined in a section which we are not including must |
613 | // be treated as an undefined symbol. | |
614 | unsigned char symbuf[sym_size]; | |
615 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
616 | unsigned int st_shndx = psym->get_st_shndx(); | |
617 | if (st_shndx != elfcpp::SHN_UNDEF | |
618 | && st_shndx < elfcpp::SHN_LORESERVE | |
dbe717ef | 619 | && !relobj->is_section_included(st_shndx)) |
a783673b ILT |
620 | { |
621 | memcpy(symbuf, p, sym_size); | |
622 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
623 | sw.put_st_shndx(elfcpp::SHN_UNDEF); | |
624 | psym = &sym2; | |
625 | } | |
626 | ||
14bfc3f5 ILT |
627 | // In an object file, an '@' in the name separates the symbol |
628 | // name from the version name. If there are two '@' characters, | |
629 | // this is the default version. | |
630 | const char* ver = strchr(name, '@'); | |
09124467 ILT |
631 | int namelen = 0; |
632 | bool def = false; | |
633 | ||
634 | if (ver != NULL) | |
635 | { | |
636 | // The symbol name is of the form foo@VERSION or foo@@VERSION | |
637 | namelen = ver - name; | |
638 | ++ver; | |
639 | if (*ver == '@') | |
640 | { | |
641 | def = true; | |
642 | ++ver; | |
643 | } | |
644 | } | |
645 | else if (!version_script_.empty()) | |
646 | { | |
647 | // The symbol name did not have a version, but | |
648 | // the version script may assign a version anyway. | |
649 | namelen = strlen(name); | |
650 | def = true; | |
651 | const std::string& version = | |
652 | version_script_.get_symbol_version(name); | |
653 | if (!version.empty()) | |
654 | ver = version.c_str(); | |
655 | } | |
14bfc3f5 | 656 | |
aeddab66 | 657 | Sized_symbol<size>* res; |
14bfc3f5 ILT |
658 | if (ver == NULL) |
659 | { | |
f0641a0b | 660 | Stringpool::Key name_key; |
cfd73a4e | 661 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef | 662 | res = this->add_from_object(relobj, name, name_key, NULL, 0, |
70e654ba | 663 | false, *psym, sym); |
14bfc3f5 ILT |
664 | } |
665 | else | |
666 | { | |
f0641a0b | 667 | Stringpool::Key name_key; |
09124467 | 668 | name = this->namepool_.add_with_length(name, namelen, true, |
c0873094 | 669 | &name_key); |
f0641a0b | 670 | Stringpool::Key ver_key; |
cfd73a4e | 671 | ver = this->namepool_.add(ver, true, &ver_key); |
f0641a0b | 672 | |
dbe717ef | 673 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
70e654ba | 674 | def, *psym, sym); |
14bfc3f5 ILT |
675 | } |
676 | ||
730cdc88 | 677 | (*sympointers)[i] = res; |
14bfc3f5 ILT |
678 | } |
679 | } | |
680 | ||
dbe717ef ILT |
681 | // Add all the symbols in a dynamic object to the hash table. |
682 | ||
683 | template<int size, bool big_endian> | |
684 | void | |
685 | Symbol_table::add_from_dynobj( | |
686 | Sized_dynobj<size, big_endian>* dynobj, | |
687 | const unsigned char* syms, | |
688 | size_t count, | |
689 | const char* sym_names, | |
690 | size_t sym_name_size, | |
691 | const unsigned char* versym, | |
692 | size_t versym_size, | |
693 | const std::vector<const char*>* version_map) | |
694 | { | |
9025d29d ILT |
695 | gold_assert(size == dynobj->target()->get_size()); |
696 | gold_assert(size == parameters->get_size()); | |
dbe717ef ILT |
697 | |
698 | if (versym != NULL && versym_size / 2 < count) | |
699 | { | |
75f2446e ILT |
700 | dynobj->error(_("too few symbol versions")); |
701 | return; | |
dbe717ef ILT |
702 | } |
703 | ||
704 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
705 | ||
aeddab66 ILT |
706 | // We keep a list of all STT_OBJECT symbols, so that we can resolve |
707 | // weak aliases. This is necessary because if the dynamic object | |
708 | // provides the same variable under two names, one of which is a | |
709 | // weak definition, and the regular object refers to the weak | |
710 | // definition, we have to put both the weak definition and the | |
711 | // strong definition into the dynamic symbol table. Given a weak | |
712 | // definition, the only way that we can find the corresponding | |
713 | // strong definition, if any, is to search the symbol table. | |
714 | std::vector<Sized_symbol<size>*> object_symbols; | |
715 | ||
dbe717ef ILT |
716 | const unsigned char* p = syms; |
717 | const unsigned char* vs = versym; | |
718 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) | |
719 | { | |
720 | elfcpp::Sym<size, big_endian> sym(p); | |
721 | ||
722 | // Ignore symbols with local binding. | |
723 | if (sym.get_st_bind() == elfcpp::STB_LOCAL) | |
724 | continue; | |
725 | ||
726 | unsigned int st_name = sym.get_st_name(); | |
727 | if (st_name >= sym_name_size) | |
728 | { | |
75f2446e ILT |
729 | dynobj->error(_("bad symbol name offset %u at %zu"), |
730 | st_name, i); | |
731 | continue; | |
dbe717ef ILT |
732 | } |
733 | ||
734 | const char* name = sym_names + st_name; | |
735 | ||
aeddab66 ILT |
736 | Sized_symbol<size>* res; |
737 | ||
dbe717ef ILT |
738 | if (versym == NULL) |
739 | { | |
740 | Stringpool::Key name_key; | |
cfd73a4e | 741 | name = this->namepool_.add(name, true, &name_key); |
aeddab66 | 742 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
70e654ba | 743 | false, sym, sym); |
dbe717ef | 744 | } |
aeddab66 ILT |
745 | else |
746 | { | |
747 | // Read the version information. | |
dbe717ef | 748 | |
aeddab66 | 749 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); |
dbe717ef | 750 | |
aeddab66 ILT |
751 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; |
752 | v &= elfcpp::VERSYM_VERSION; | |
dbe717ef | 753 | |
aeddab66 ILT |
754 | // The Sun documentation says that V can be VER_NDX_LOCAL, |
755 | // or VER_NDX_GLOBAL, or a version index. The meaning of | |
756 | // VER_NDX_LOCAL is defined as "Symbol has local scope." | |
757 | // The old GNU linker will happily generate VER_NDX_LOCAL | |
758 | // for an undefined symbol. I don't know what the Sun | |
759 | // linker will generate. | |
dbe717ef | 760 | |
aeddab66 ILT |
761 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
762 | && sym.get_st_shndx() != elfcpp::SHN_UNDEF) | |
763 | { | |
764 | // This symbol should not be visible outside the object. | |
765 | continue; | |
766 | } | |
64707334 | 767 | |
aeddab66 ILT |
768 | // At this point we are definitely going to add this symbol. |
769 | Stringpool::Key name_key; | |
770 | name = this->namepool_.add(name, true, &name_key); | |
dbe717ef | 771 | |
aeddab66 ILT |
772 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
773 | || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) | |
774 | { | |
775 | // This symbol does not have a version. | |
776 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, | |
70e654ba | 777 | false, sym, sym); |
aeddab66 ILT |
778 | } |
779 | else | |
780 | { | |
781 | if (v >= version_map->size()) | |
782 | { | |
783 | dynobj->error(_("versym for symbol %zu out of range: %u"), | |
784 | i, v); | |
785 | continue; | |
786 | } | |
dbe717ef | 787 | |
aeddab66 ILT |
788 | const char* version = (*version_map)[v]; |
789 | if (version == NULL) | |
790 | { | |
791 | dynobj->error(_("versym for symbol %zu has no name: %u"), | |
792 | i, v); | |
793 | continue; | |
794 | } | |
dbe717ef | 795 | |
aeddab66 ILT |
796 | Stringpool::Key version_key; |
797 | version = this->namepool_.add(version, true, &version_key); | |
798 | ||
799 | // If this is an absolute symbol, and the version name | |
800 | // and symbol name are the same, then this is the | |
801 | // version definition symbol. These symbols exist to | |
802 | // support using -u to pull in particular versions. We | |
803 | // do not want to record a version for them. | |
804 | if (sym.get_st_shndx() == elfcpp::SHN_ABS | |
805 | && name_key == version_key) | |
806 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, | |
70e654ba | 807 | false, sym, sym); |
aeddab66 ILT |
808 | else |
809 | { | |
810 | const bool def = (!hidden | |
811 | && (sym.get_st_shndx() | |
812 | != elfcpp::SHN_UNDEF)); | |
813 | res = this->add_from_object(dynobj, name, name_key, version, | |
70e654ba | 814 | version_key, def, sym, sym); |
aeddab66 ILT |
815 | } |
816 | } | |
dbe717ef ILT |
817 | } |
818 | ||
aeddab66 ILT |
819 | if (sym.get_st_shndx() != elfcpp::SHN_UNDEF |
820 | && sym.get_st_type() == elfcpp::STT_OBJECT) | |
821 | object_symbols.push_back(res); | |
822 | } | |
823 | ||
824 | this->record_weak_aliases(&object_symbols); | |
825 | } | |
826 | ||
827 | // This is used to sort weak aliases. We sort them first by section | |
828 | // index, then by offset, then by weak ahead of strong. | |
829 | ||
830 | template<int size> | |
831 | class Weak_alias_sorter | |
832 | { | |
833 | public: | |
834 | bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const; | |
835 | }; | |
836 | ||
837 | template<int size> | |
838 | bool | |
839 | Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1, | |
840 | const Sized_symbol<size>* s2) const | |
841 | { | |
842 | if (s1->shndx() != s2->shndx()) | |
843 | return s1->shndx() < s2->shndx(); | |
844 | if (s1->value() != s2->value()) | |
845 | return s1->value() < s2->value(); | |
846 | if (s1->binding() != s2->binding()) | |
847 | { | |
848 | if (s1->binding() == elfcpp::STB_WEAK) | |
849 | return true; | |
850 | if (s2->binding() == elfcpp::STB_WEAK) | |
851 | return false; | |
852 | } | |
853 | return std::string(s1->name()) < std::string(s2->name()); | |
854 | } | |
dbe717ef | 855 | |
aeddab66 ILT |
856 | // SYMBOLS is a list of object symbols from a dynamic object. Look |
857 | // for any weak aliases, and record them so that if we add the weak | |
858 | // alias to the dynamic symbol table, we also add the corresponding | |
859 | // strong symbol. | |
dbe717ef | 860 | |
aeddab66 ILT |
861 | template<int size> |
862 | void | |
863 | Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols) | |
864 | { | |
865 | // Sort the vector by section index, then by offset, then by weak | |
866 | // ahead of strong. | |
867 | std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>()); | |
868 | ||
869 | // Walk through the vector. For each weak definition, record | |
870 | // aliases. | |
871 | for (typename std::vector<Sized_symbol<size>*>::const_iterator p = | |
872 | symbols->begin(); | |
873 | p != symbols->end(); | |
874 | ++p) | |
875 | { | |
876 | if ((*p)->binding() != elfcpp::STB_WEAK) | |
877 | continue; | |
878 | ||
879 | // Build a circular list of weak aliases. Each symbol points to | |
880 | // the next one in the circular list. | |
881 | ||
882 | Sized_symbol<size>* from_sym = *p; | |
883 | typename std::vector<Sized_symbol<size>*>::const_iterator q; | |
884 | for (q = p + 1; q != symbols->end(); ++q) | |
dbe717ef | 885 | { |
aeddab66 ILT |
886 | if ((*q)->shndx() != from_sym->shndx() |
887 | || (*q)->value() != from_sym->value()) | |
888 | break; | |
889 | ||
890 | this->weak_aliases_[from_sym] = *q; | |
891 | from_sym->set_has_alias(); | |
892 | from_sym = *q; | |
dbe717ef ILT |
893 | } |
894 | ||
aeddab66 ILT |
895 | if (from_sym != *p) |
896 | { | |
897 | this->weak_aliases_[from_sym] = *p; | |
898 | from_sym->set_has_alias(); | |
899 | } | |
dbe717ef | 900 | |
aeddab66 | 901 | p = q - 1; |
dbe717ef ILT |
902 | } |
903 | } | |
904 | ||
ead1e424 ILT |
905 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
906 | // true, then only create the symbol if there is a reference to it. | |
86f2e683 | 907 | // If this does not return NULL, it sets *POLDSYM to the existing |
306d9ef0 | 908 | // symbol if there is one. This canonicalizes *PNAME and *PVERSION. |
ead1e424 ILT |
909 | |
910 | template<int size, bool big_endian> | |
911 | Sized_symbol<size>* | |
306d9ef0 ILT |
912 | Symbol_table::define_special_symbol(const Target* target, const char** pname, |
913 | const char** pversion, bool only_if_ref, | |
86f2e683 | 914 | Sized_symbol<size>** poldsym |
593f47df | 915 | ACCEPT_SIZE_ENDIAN) |
ead1e424 | 916 | { |
ead1e424 ILT |
917 | Symbol* oldsym; |
918 | Sized_symbol<size>* sym; | |
86f2e683 ILT |
919 | bool add_to_table = false; |
920 | typename Symbol_table_type::iterator add_loc = this->table_.end(); | |
ead1e424 ILT |
921 | |
922 | if (only_if_ref) | |
923 | { | |
306d9ef0 | 924 | oldsym = this->lookup(*pname, *pversion); |
f6ce93d6 | 925 | if (oldsym == NULL || !oldsym->is_undefined()) |
ead1e424 | 926 | return NULL; |
306d9ef0 ILT |
927 | |
928 | *pname = oldsym->name(); | |
929 | *pversion = oldsym->version(); | |
ead1e424 ILT |
930 | } |
931 | else | |
932 | { | |
14b31740 | 933 | // Canonicalize NAME and VERSION. |
f0641a0b | 934 | Stringpool::Key name_key; |
cfd73a4e | 935 | *pname = this->namepool_.add(*pname, true, &name_key); |
ead1e424 | 936 | |
14b31740 | 937 | Stringpool::Key version_key = 0; |
306d9ef0 | 938 | if (*pversion != NULL) |
cfd73a4e | 939 | *pversion = this->namepool_.add(*pversion, true, &version_key); |
14b31740 | 940 | |
ead1e424 | 941 | Symbol* const snull = NULL; |
ead1e424 | 942 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
14b31740 ILT |
943 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
944 | version_key), | |
ead1e424 ILT |
945 | snull)); |
946 | ||
947 | if (!ins.second) | |
948 | { | |
14b31740 | 949 | // We already have a symbol table entry for NAME/VERSION. |
ead1e424 | 950 | oldsym = ins.first->second; |
a3ad94ed | 951 | gold_assert(oldsym != NULL); |
ead1e424 ILT |
952 | } |
953 | else | |
954 | { | |
955 | // We haven't seen this symbol before. | |
a3ad94ed | 956 | gold_assert(ins.first->second == NULL); |
86f2e683 ILT |
957 | add_to_table = true; |
958 | add_loc = ins.first; | |
ead1e424 ILT |
959 | oldsym = NULL; |
960 | } | |
961 | } | |
962 | ||
86f2e683 ILT |
963 | if (!target->has_make_symbol()) |
964 | sym = new Sized_symbol<size>(); | |
965 | else | |
ead1e424 | 966 | { |
86f2e683 ILT |
967 | gold_assert(target->get_size() == size); |
968 | gold_assert(target->is_big_endian() ? big_endian : !big_endian); | |
969 | typedef Sized_target<size, big_endian> My_target; | |
970 | const My_target* sized_target = | |
971 | static_cast<const My_target*>(target); | |
972 | sym = sized_target->make_symbol(); | |
973 | if (sym == NULL) | |
974 | return NULL; | |
975 | } | |
ead1e424 | 976 | |
86f2e683 ILT |
977 | if (add_to_table) |
978 | add_loc->second = sym; | |
979 | else | |
980 | gold_assert(oldsym != NULL); | |
ead1e424 | 981 | |
86f2e683 ILT |
982 | *poldsym = this->get_sized_symbol SELECT_SIZE_NAME(size) (oldsym |
983 | SELECT_SIZE(size)); | |
ead1e424 ILT |
984 | |
985 | return sym; | |
986 | } | |
987 | ||
988 | // Define a symbol based on an Output_data. | |
989 | ||
14b31740 ILT |
990 | Symbol* |
991 | Symbol_table::define_in_output_data(const Target* target, const char* name, | |
992 | const char* version, Output_data* od, | |
ead1e424 ILT |
993 | uint64_t value, uint64_t symsize, |
994 | elfcpp::STT type, elfcpp::STB binding, | |
995 | elfcpp::STV visibility, | |
996 | unsigned char nonvis, | |
997 | bool offset_is_from_end, | |
998 | bool only_if_ref) | |
999 | { | |
9025d29d | 1000 | if (parameters->get_size() == 32) |
86f2e683 ILT |
1001 | { |
1002 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
1003 | return this->do_define_in_output_data<32>(target, name, version, od, | |
1004 | value, symsize, type, binding, | |
1005 | visibility, nonvis, | |
1006 | offset_is_from_end, | |
1007 | only_if_ref); | |
1008 | #else | |
1009 | gold_unreachable(); | |
1010 | #endif | |
1011 | } | |
9025d29d | 1012 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
1013 | { |
1014 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
1015 | return this->do_define_in_output_data<64>(target, name, version, od, | |
1016 | value, symsize, type, binding, | |
1017 | visibility, nonvis, | |
1018 | offset_is_from_end, | |
1019 | only_if_ref); | |
1020 | #else | |
1021 | gold_unreachable(); | |
1022 | #endif | |
1023 | } | |
ead1e424 | 1024 | else |
a3ad94ed | 1025 | gold_unreachable(); |
ead1e424 ILT |
1026 | } |
1027 | ||
1028 | // Define a symbol in an Output_data, sized version. | |
1029 | ||
1030 | template<int size> | |
14b31740 | 1031 | Sized_symbol<size>* |
ead1e424 | 1032 | Symbol_table::do_define_in_output_data( |
14b31740 | 1033 | const Target* target, |
ead1e424 | 1034 | const char* name, |
14b31740 | 1035 | const char* version, |
ead1e424 ILT |
1036 | Output_data* od, |
1037 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
1038 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
1039 | elfcpp::STT type, | |
1040 | elfcpp::STB binding, | |
1041 | elfcpp::STV visibility, | |
1042 | unsigned char nonvis, | |
1043 | bool offset_is_from_end, | |
1044 | bool only_if_ref) | |
1045 | { | |
1046 | Sized_symbol<size>* sym; | |
86f2e683 | 1047 | Sized_symbol<size>* oldsym; |
ead1e424 | 1048 | |
9025d29d | 1049 | if (parameters->is_big_endian()) |
193a53d9 ILT |
1050 | { |
1051 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
1052 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
306d9ef0 | 1053 | target, &name, &version, only_if_ref, &oldsym |
193a53d9 ILT |
1054 | SELECT_SIZE_ENDIAN(size, true)); |
1055 | #else | |
1056 | gold_unreachable(); | |
1057 | #endif | |
1058 | } | |
ead1e424 | 1059 | else |
193a53d9 ILT |
1060 | { |
1061 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
1062 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
306d9ef0 | 1063 | target, &name, &version, only_if_ref, &oldsym |
193a53d9 ILT |
1064 | SELECT_SIZE_ENDIAN(size, false)); |
1065 | #else | |
1066 | gold_unreachable(); | |
1067 | #endif | |
1068 | } | |
ead1e424 ILT |
1069 | |
1070 | if (sym == NULL) | |
14b31740 | 1071 | return NULL; |
ead1e424 | 1072 | |
d4f5281b | 1073 | gold_assert(version == NULL || oldsym != NULL); |
ead1e424 ILT |
1074 | sym->init(name, od, value, symsize, type, binding, visibility, nonvis, |
1075 | offset_is_from_end); | |
14b31740 | 1076 | |
e5756efb ILT |
1077 | if (oldsym == NULL) |
1078 | return sym; | |
86f2e683 | 1079 | |
e5756efb ILT |
1080 | if (Symbol_table::should_override_with_special(oldsym)) |
1081 | this->override_with_special(oldsym, sym); | |
1082 | delete sym; | |
1083 | return oldsym; | |
ead1e424 ILT |
1084 | } |
1085 | ||
1086 | // Define a symbol based on an Output_segment. | |
1087 | ||
14b31740 ILT |
1088 | Symbol* |
1089 | Symbol_table::define_in_output_segment(const Target* target, const char* name, | |
1090 | const char* version, Output_segment* os, | |
ead1e424 ILT |
1091 | uint64_t value, uint64_t symsize, |
1092 | elfcpp::STT type, elfcpp::STB binding, | |
1093 | elfcpp::STV visibility, | |
1094 | unsigned char nonvis, | |
1095 | Symbol::Segment_offset_base offset_base, | |
1096 | bool only_if_ref) | |
1097 | { | |
9025d29d | 1098 | if (parameters->get_size() == 32) |
86f2e683 ILT |
1099 | { |
1100 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
1101 | return this->do_define_in_output_segment<32>(target, name, version, os, | |
1102 | value, symsize, type, | |
1103 | binding, visibility, nonvis, | |
1104 | offset_base, only_if_ref); | |
1105 | #else | |
1106 | gold_unreachable(); | |
1107 | #endif | |
1108 | } | |
9025d29d | 1109 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
1110 | { |
1111 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
1112 | return this->do_define_in_output_segment<64>(target, name, version, os, | |
1113 | value, symsize, type, | |
1114 | binding, visibility, nonvis, | |
1115 | offset_base, only_if_ref); | |
1116 | #else | |
1117 | gold_unreachable(); | |
1118 | #endif | |
1119 | } | |
ead1e424 | 1120 | else |
a3ad94ed | 1121 | gold_unreachable(); |
ead1e424 ILT |
1122 | } |
1123 | ||
1124 | // Define a symbol in an Output_segment, sized version. | |
1125 | ||
1126 | template<int size> | |
14b31740 | 1127 | Sized_symbol<size>* |
ead1e424 | 1128 | Symbol_table::do_define_in_output_segment( |
14b31740 | 1129 | const Target* target, |
ead1e424 | 1130 | const char* name, |
14b31740 | 1131 | const char* version, |
ead1e424 ILT |
1132 | Output_segment* os, |
1133 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
1134 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
1135 | elfcpp::STT type, | |
1136 | elfcpp::STB binding, | |
1137 | elfcpp::STV visibility, | |
1138 | unsigned char nonvis, | |
1139 | Symbol::Segment_offset_base offset_base, | |
1140 | bool only_if_ref) | |
1141 | { | |
1142 | Sized_symbol<size>* sym; | |
86f2e683 | 1143 | Sized_symbol<size>* oldsym; |
ead1e424 | 1144 | |
9025d29d ILT |
1145 | if (parameters->is_big_endian()) |
1146 | { | |
1147 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
1148 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
1149 | target, &name, &version, only_if_ref, &oldsym | |
1150 | SELECT_SIZE_ENDIAN(size, true)); | |
1151 | #else | |
1152 | gold_unreachable(); | |
1153 | #endif | |
1154 | } | |
ead1e424 | 1155 | else |
9025d29d ILT |
1156 | { |
1157 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
1158 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
1159 | target, &name, &version, only_if_ref, &oldsym | |
1160 | SELECT_SIZE_ENDIAN(size, false)); | |
1161 | #else | |
1162 | gold_unreachable(); | |
1163 | #endif | |
1164 | } | |
ead1e424 ILT |
1165 | |
1166 | if (sym == NULL) | |
14b31740 | 1167 | return NULL; |
ead1e424 | 1168 | |
d4f5281b | 1169 | gold_assert(version == NULL || oldsym != NULL); |
ead1e424 ILT |
1170 | sym->init(name, os, value, symsize, type, binding, visibility, nonvis, |
1171 | offset_base); | |
14b31740 | 1172 | |
e5756efb ILT |
1173 | if (oldsym == NULL) |
1174 | return sym; | |
86f2e683 | 1175 | |
e5756efb ILT |
1176 | if (Symbol_table::should_override_with_special(oldsym)) |
1177 | this->override_with_special(oldsym, sym); | |
1178 | delete sym; | |
1179 | return oldsym; | |
ead1e424 ILT |
1180 | } |
1181 | ||
1182 | // Define a special symbol with a constant value. It is a multiple | |
1183 | // definition error if this symbol is already defined. | |
1184 | ||
14b31740 ILT |
1185 | Symbol* |
1186 | Symbol_table::define_as_constant(const Target* target, const char* name, | |
1187 | const char* version, uint64_t value, | |
1188 | uint64_t symsize, elfcpp::STT type, | |
1189 | elfcpp::STB binding, elfcpp::STV visibility, | |
1190 | unsigned char nonvis, bool only_if_ref) | |
ead1e424 | 1191 | { |
9025d29d | 1192 | if (parameters->get_size() == 32) |
86f2e683 ILT |
1193 | { |
1194 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
1195 | return this->do_define_as_constant<32>(target, name, version, value, | |
1196 | symsize, type, binding, | |
1197 | visibility, nonvis, only_if_ref); | |
1198 | #else | |
1199 | gold_unreachable(); | |
1200 | #endif | |
1201 | } | |
9025d29d | 1202 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
1203 | { |
1204 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
1205 | return this->do_define_as_constant<64>(target, name, version, value, | |
1206 | symsize, type, binding, | |
1207 | visibility, nonvis, only_if_ref); | |
1208 | #else | |
1209 | gold_unreachable(); | |
1210 | #endif | |
1211 | } | |
ead1e424 | 1212 | else |
a3ad94ed | 1213 | gold_unreachable(); |
ead1e424 ILT |
1214 | } |
1215 | ||
1216 | // Define a symbol as a constant, sized version. | |
1217 | ||
1218 | template<int size> | |
14b31740 | 1219 | Sized_symbol<size>* |
ead1e424 | 1220 | Symbol_table::do_define_as_constant( |
14b31740 | 1221 | const Target* target, |
ead1e424 | 1222 | const char* name, |
14b31740 | 1223 | const char* version, |
ead1e424 ILT |
1224 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
1225 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
1226 | elfcpp::STT type, | |
1227 | elfcpp::STB binding, | |
1228 | elfcpp::STV visibility, | |
1229 | unsigned char nonvis, | |
1230 | bool only_if_ref) | |
1231 | { | |
1232 | Sized_symbol<size>* sym; | |
86f2e683 | 1233 | Sized_symbol<size>* oldsym; |
ead1e424 | 1234 | |
9025d29d ILT |
1235 | if (parameters->is_big_endian()) |
1236 | { | |
1237 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
1238 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
1239 | target, &name, &version, only_if_ref, &oldsym | |
1240 | SELECT_SIZE_ENDIAN(size, true)); | |
1241 | #else | |
1242 | gold_unreachable(); | |
1243 | #endif | |
1244 | } | |
ead1e424 | 1245 | else |
9025d29d ILT |
1246 | { |
1247 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
1248 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
1249 | target, &name, &version, only_if_ref, &oldsym | |
1250 | SELECT_SIZE_ENDIAN(size, false)); | |
1251 | #else | |
1252 | gold_unreachable(); | |
1253 | #endif | |
1254 | } | |
ead1e424 ILT |
1255 | |
1256 | if (sym == NULL) | |
14b31740 | 1257 | return NULL; |
ead1e424 | 1258 | |
09124467 | 1259 | gold_assert(version == NULL || version == name || oldsym != NULL); |
ead1e424 | 1260 | sym->init(name, value, symsize, type, binding, visibility, nonvis); |
14b31740 | 1261 | |
e5756efb ILT |
1262 | if (oldsym == NULL) |
1263 | return sym; | |
86f2e683 | 1264 | |
e5756efb ILT |
1265 | if (Symbol_table::should_override_with_special(oldsym)) |
1266 | this->override_with_special(oldsym, sym); | |
1267 | delete sym; | |
1268 | return oldsym; | |
ead1e424 ILT |
1269 | } |
1270 | ||
1271 | // Define a set of symbols in output sections. | |
1272 | ||
1273 | void | |
14b31740 ILT |
1274 | Symbol_table::define_symbols(const Layout* layout, const Target* target, |
1275 | int count, const Define_symbol_in_section* p) | |
ead1e424 ILT |
1276 | { |
1277 | for (int i = 0; i < count; ++i, ++p) | |
1278 | { | |
1279 | Output_section* os = layout->find_output_section(p->output_section); | |
1280 | if (os != NULL) | |
14b31740 ILT |
1281 | this->define_in_output_data(target, p->name, NULL, os, p->value, |
1282 | p->size, p->type, p->binding, | |
1283 | p->visibility, p->nonvis, | |
1284 | p->offset_is_from_end, p->only_if_ref); | |
ead1e424 | 1285 | else |
14b31740 | 1286 | this->define_as_constant(target, p->name, NULL, 0, p->size, p->type, |
ead1e424 ILT |
1287 | p->binding, p->visibility, p->nonvis, |
1288 | p->only_if_ref); | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | // Define a set of symbols in output segments. | |
1293 | ||
1294 | void | |
14b31740 ILT |
1295 | Symbol_table::define_symbols(const Layout* layout, const Target* target, |
1296 | int count, const Define_symbol_in_segment* p) | |
ead1e424 ILT |
1297 | { |
1298 | for (int i = 0; i < count; ++i, ++p) | |
1299 | { | |
1300 | Output_segment* os = layout->find_output_segment(p->segment_type, | |
1301 | p->segment_flags_set, | |
1302 | p->segment_flags_clear); | |
1303 | if (os != NULL) | |
14b31740 ILT |
1304 | this->define_in_output_segment(target, p->name, NULL, os, p->value, |
1305 | p->size, p->type, p->binding, | |
1306 | p->visibility, p->nonvis, | |
1307 | p->offset_base, p->only_if_ref); | |
ead1e424 | 1308 | else |
14b31740 | 1309 | this->define_as_constant(target, p->name, NULL, 0, p->size, p->type, |
ead1e424 ILT |
1310 | p->binding, p->visibility, p->nonvis, |
1311 | p->only_if_ref); | |
1312 | } | |
1313 | } | |
1314 | ||
46fe1623 ILT |
1315 | // Define CSYM using a COPY reloc. POSD is the Output_data where the |
1316 | // symbol should be defined--typically a .dyn.bss section. VALUE is | |
1317 | // the offset within POSD. | |
1318 | ||
1319 | template<int size> | |
1320 | void | |
fe8718a4 ILT |
1321 | Symbol_table::define_with_copy_reloc( |
1322 | const Target* target, | |
1323 | Sized_symbol<size>* csym, | |
1324 | Output_data* posd, | |
1325 | typename elfcpp::Elf_types<size>::Elf_Addr value) | |
46fe1623 ILT |
1326 | { |
1327 | gold_assert(csym->is_from_dynobj()); | |
1328 | gold_assert(!csym->is_copied_from_dynobj()); | |
1329 | Object* object = csym->object(); | |
1330 | gold_assert(object->is_dynamic()); | |
1331 | Dynobj* dynobj = static_cast<Dynobj*>(object); | |
1332 | ||
1333 | // Our copied variable has to override any variable in a shared | |
1334 | // library. | |
1335 | elfcpp::STB binding = csym->binding(); | |
1336 | if (binding == elfcpp::STB_WEAK) | |
1337 | binding = elfcpp::STB_GLOBAL; | |
1338 | ||
1339 | this->define_in_output_data(target, csym->name(), csym->version(), | |
1340 | posd, value, csym->symsize(), | |
1341 | csym->type(), binding, | |
1342 | csym->visibility(), csym->nonvis(), | |
1343 | false, false); | |
1344 | ||
1345 | csym->set_is_copied_from_dynobj(); | |
1346 | csym->set_needs_dynsym_entry(); | |
1347 | ||
1348 | this->copied_symbol_dynobjs_[csym] = dynobj; | |
1349 | ||
1350 | // We have now defined all aliases, but we have not entered them all | |
1351 | // in the copied_symbol_dynobjs_ map. | |
1352 | if (csym->has_alias()) | |
1353 | { | |
1354 | Symbol* sym = csym; | |
1355 | while (true) | |
1356 | { | |
1357 | sym = this->weak_aliases_[sym]; | |
1358 | if (sym == csym) | |
1359 | break; | |
1360 | gold_assert(sym->output_data() == posd); | |
1361 | ||
1362 | sym->set_is_copied_from_dynobj(); | |
1363 | this->copied_symbol_dynobjs_[sym] = dynobj; | |
1364 | } | |
1365 | } | |
1366 | } | |
1367 | ||
1368 | // SYM is defined using a COPY reloc. Return the dynamic object where | |
1369 | // the original definition was found. | |
1370 | ||
1371 | Dynobj* | |
1372 | Symbol_table::get_copy_source(const Symbol* sym) const | |
1373 | { | |
1374 | gold_assert(sym->is_copied_from_dynobj()); | |
1375 | Copied_symbol_dynobjs::const_iterator p = | |
1376 | this->copied_symbol_dynobjs_.find(sym); | |
1377 | gold_assert(p != this->copied_symbol_dynobjs_.end()); | |
1378 | return p->second; | |
1379 | } | |
1380 | ||
a3ad94ed ILT |
1381 | // Set the dynamic symbol indexes. INDEX is the index of the first |
1382 | // global dynamic symbol. Pointers to the symbols are stored into the | |
1383 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
1384 | // updated dynamic symbol index. | |
1385 | ||
1386 | unsigned int | |
35cdfc9a | 1387 | Symbol_table::set_dynsym_indexes(const Target* target, |
14b31740 | 1388 | unsigned int index, |
a3ad94ed | 1389 | std::vector<Symbol*>* syms, |
14b31740 ILT |
1390 | Stringpool* dynpool, |
1391 | Versions* versions) | |
a3ad94ed ILT |
1392 | { |
1393 | for (Symbol_table_type::iterator p = this->table_.begin(); | |
1394 | p != this->table_.end(); | |
1395 | ++p) | |
1396 | { | |
1397 | Symbol* sym = p->second; | |
16649710 ILT |
1398 | |
1399 | // Note that SYM may already have a dynamic symbol index, since | |
1400 | // some symbols appear more than once in the symbol table, with | |
1401 | // and without a version. | |
1402 | ||
436ca963 | 1403 | if (!sym->should_add_dynsym_entry()) |
16649710 ILT |
1404 | sym->set_dynsym_index(-1U); |
1405 | else if (!sym->has_dynsym_index()) | |
a3ad94ed ILT |
1406 | { |
1407 | sym->set_dynsym_index(index); | |
1408 | ++index; | |
1409 | syms->push_back(sym); | |
cfd73a4e | 1410 | dynpool->add(sym->name(), false, NULL); |
14b31740 ILT |
1411 | |
1412 | // Record any version information. | |
09124467 ILT |
1413 | if (sym->version() != NULL) |
1414 | versions->record_version(this, dynpool, sym); | |
a3ad94ed ILT |
1415 | } |
1416 | } | |
1417 | ||
14b31740 ILT |
1418 | // Finish up the versions. In some cases this may add new dynamic |
1419 | // symbols. | |
1420 | index = versions->finalize(target, this, index, syms); | |
1421 | ||
a3ad94ed ILT |
1422 | return index; |
1423 | } | |
1424 | ||
c06b7b0b ILT |
1425 | // Set the final values for all the symbols. The index of the first |
1426 | // global symbol in the output file is INDEX. Record the file offset | |
75f65a3e | 1427 | // OFF. Add their names to POOL. Return the new file offset. |
54dc6425 | 1428 | |
75f65a3e | 1429 | off_t |
cb295612 ILT |
1430 | Symbol_table::finalize(unsigned int index, off_t off, off_t dynoff, |
1431 | size_t dyn_global_index, size_t dyncount, | |
16649710 | 1432 | Stringpool* pool) |
54dc6425 | 1433 | { |
f6ce93d6 ILT |
1434 | off_t ret; |
1435 | ||
a3ad94ed | 1436 | gold_assert(index != 0); |
c06b7b0b ILT |
1437 | this->first_global_index_ = index; |
1438 | ||
16649710 ILT |
1439 | this->dynamic_offset_ = dynoff; |
1440 | this->first_dynamic_global_index_ = dyn_global_index; | |
1441 | this->dynamic_count_ = dyncount; | |
1442 | ||
9025d29d ILT |
1443 | if (parameters->get_size() == 32) |
1444 | { | |
1445 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE) | |
1446 | ret = this->sized_finalize<32>(index, off, pool); | |
1447 | #else | |
1448 | gold_unreachable(); | |
1449 | #endif | |
1450 | } | |
1451 | else if (parameters->get_size() == 64) | |
1452 | { | |
1453 | #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE) | |
1454 | ret = this->sized_finalize<64>(index, off, pool); | |
1455 | #else | |
1456 | gold_unreachable(); | |
1457 | #endif | |
1458 | } | |
61ba1cf9 | 1459 | else |
a3ad94ed | 1460 | gold_unreachable(); |
f6ce93d6 ILT |
1461 | |
1462 | // Now that we have the final symbol table, we can reliably note | |
1463 | // which symbols should get warnings. | |
cb295612 | 1464 | this->warnings_.note_warnings(this); |
f6ce93d6 ILT |
1465 | |
1466 | return ret; | |
75f65a3e ILT |
1467 | } |
1468 | ||
ead1e424 ILT |
1469 | // Set the final value for all the symbols. This is called after |
1470 | // Layout::finalize, so all the output sections have their final | |
1471 | // address. | |
75f65a3e ILT |
1472 | |
1473 | template<int size> | |
1474 | off_t | |
c06b7b0b | 1475 | Symbol_table::sized_finalize(unsigned index, off_t off, Stringpool* pool) |
75f65a3e | 1476 | { |
ead1e424 | 1477 | off = align_address(off, size >> 3); |
75f65a3e ILT |
1478 | this->offset_ = off; |
1479 | ||
c06b7b0b ILT |
1480 | size_t orig_index = index; |
1481 | ||
75f65a3e | 1482 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
c06b7b0b ILT |
1483 | for (Symbol_table_type::iterator p = this->table_.begin(); |
1484 | p != this->table_.end(); | |
1485 | ++p) | |
54dc6425 | 1486 | { |
75f65a3e | 1487 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); |
54dc6425 | 1488 | |
75f65a3e | 1489 | // FIXME: Here we need to decide which symbols should go into |
a3ad94ed ILT |
1490 | // the output file, based on --strip. |
1491 | ||
1492 | // The default version of a symbol may appear twice in the | |
1493 | // symbol table. We only need to finalize it once. | |
1494 | if (sym->has_symtab_index()) | |
1495 | continue; | |
75f65a3e | 1496 | |
008db82e ILT |
1497 | if (!sym->in_reg()) |
1498 | { | |
1499 | gold_assert(!sym->has_symtab_index()); | |
1500 | sym->set_symtab_index(-1U); | |
1501 | gold_assert(sym->dynsym_index() == -1U); | |
1502 | continue; | |
1503 | } | |
1504 | ||
ead1e424 | 1505 | typename Sized_symbol<size>::Value_type value; |
75f65a3e | 1506 | |
ead1e424 | 1507 | switch (sym->source()) |
75f65a3e | 1508 | { |
ead1e424 ILT |
1509 | case Symbol::FROM_OBJECT: |
1510 | { | |
16649710 | 1511 | unsigned int shndx = sym->shndx(); |
ead1e424 ILT |
1512 | |
1513 | // FIXME: We need some target specific support here. | |
16649710 ILT |
1514 | if (shndx >= elfcpp::SHN_LORESERVE |
1515 | && shndx != elfcpp::SHN_ABS) | |
ead1e424 | 1516 | { |
75f2446e | 1517 | gold_error(_("%s: unsupported symbol section 0x%x"), |
a2b1aa12 | 1518 | sym->demangled_name().c_str(), shndx); |
75f2446e | 1519 | shndx = elfcpp::SHN_UNDEF; |
ead1e424 ILT |
1520 | } |
1521 | ||
f6ce93d6 ILT |
1522 | Object* symobj = sym->object(); |
1523 | if (symobj->is_dynamic()) | |
1524 | { | |
1525 | value = 0; | |
16649710 | 1526 | shndx = elfcpp::SHN_UNDEF; |
f6ce93d6 | 1527 | } |
16649710 | 1528 | else if (shndx == elfcpp::SHN_UNDEF) |
ead1e424 | 1529 | value = 0; |
16649710 | 1530 | else if (shndx == elfcpp::SHN_ABS) |
ead1e424 ILT |
1531 | value = sym->value(); |
1532 | else | |
1533 | { | |
f6ce93d6 | 1534 | Relobj* relobj = static_cast<Relobj*>(symobj); |
8383303e | 1535 | section_offset_type secoff; |
16649710 | 1536 | Output_section* os = relobj->output_section(shndx, &secoff); |
ead1e424 ILT |
1537 | |
1538 | if (os == NULL) | |
1539 | { | |
c06b7b0b | 1540 | sym->set_symtab_index(-1U); |
16649710 | 1541 | gold_assert(sym->dynsym_index() == -1U); |
ead1e424 ILT |
1542 | continue; |
1543 | } | |
1544 | ||
7bf1f802 ILT |
1545 | if (sym->type() == elfcpp::STT_TLS) |
1546 | value = sym->value() + os->tls_offset() + secoff; | |
1547 | else | |
1548 | value = sym->value() + os->address() + secoff; | |
ead1e424 ILT |
1549 | } |
1550 | } | |
1551 | break; | |
1552 | ||
1553 | case Symbol::IN_OUTPUT_DATA: | |
1554 | { | |
1555 | Output_data* od = sym->output_data(); | |
1556 | value = sym->value() + od->address(); | |
1557 | if (sym->offset_is_from_end()) | |
1558 | value += od->data_size(); | |
1559 | } | |
1560 | break; | |
1561 | ||
1562 | case Symbol::IN_OUTPUT_SEGMENT: | |
1563 | { | |
1564 | Output_segment* os = sym->output_segment(); | |
1565 | value = sym->value() + os->vaddr(); | |
1566 | switch (sym->offset_base()) | |
1567 | { | |
1568 | case Symbol::SEGMENT_START: | |
1569 | break; | |
1570 | case Symbol::SEGMENT_END: | |
1571 | value += os->memsz(); | |
1572 | break; | |
1573 | case Symbol::SEGMENT_BSS: | |
1574 | value += os->filesz(); | |
1575 | break; | |
1576 | default: | |
a3ad94ed | 1577 | gold_unreachable(); |
ead1e424 ILT |
1578 | } |
1579 | } | |
1580 | break; | |
1581 | ||
1582 | case Symbol::CONSTANT: | |
1583 | value = sym->value(); | |
1584 | break; | |
1585 | ||
1586 | default: | |
a3ad94ed | 1587 | gold_unreachable(); |
54dc6425 | 1588 | } |
ead1e424 ILT |
1589 | |
1590 | sym->set_value(value); | |
9e2dcb77 ILT |
1591 | |
1592 | if (parameters->strip_all()) | |
1593 | sym->set_symtab_index(-1U); | |
1594 | else | |
1595 | { | |
1596 | sym->set_symtab_index(index); | |
cfd73a4e | 1597 | pool->add(sym->name(), false, NULL); |
9e2dcb77 ILT |
1598 | ++index; |
1599 | off += sym_size; | |
1600 | } | |
54dc6425 | 1601 | } |
75f65a3e | 1602 | |
c06b7b0b | 1603 | this->output_count_ = index - orig_index; |
61ba1cf9 | 1604 | |
75f65a3e | 1605 | return off; |
54dc6425 ILT |
1606 | } |
1607 | ||
61ba1cf9 ILT |
1608 | // Write out the global symbols. |
1609 | ||
1610 | void | |
9a2d6984 ILT |
1611 | Symbol_table::write_globals(const Input_objects* input_objects, |
1612 | const Stringpool* sympool, | |
16649710 | 1613 | const Stringpool* dynpool, Output_file* of) const |
61ba1cf9 | 1614 | { |
9025d29d | 1615 | if (parameters->get_size() == 32) |
61ba1cf9 | 1616 | { |
9025d29d ILT |
1617 | if (parameters->is_big_endian()) |
1618 | { | |
1619 | #ifdef HAVE_TARGET_32_BIG | |
9a2d6984 ILT |
1620 | this->sized_write_globals<32, true>(input_objects, sympool, |
1621 | dynpool, of); | |
9025d29d ILT |
1622 | #else |
1623 | gold_unreachable(); | |
1624 | #endif | |
1625 | } | |
61ba1cf9 | 1626 | else |
9025d29d ILT |
1627 | { |
1628 | #ifdef HAVE_TARGET_32_LITTLE | |
9a2d6984 ILT |
1629 | this->sized_write_globals<32, false>(input_objects, sympool, |
1630 | dynpool, of); | |
9025d29d ILT |
1631 | #else |
1632 | gold_unreachable(); | |
1633 | #endif | |
1634 | } | |
61ba1cf9 | 1635 | } |
9025d29d | 1636 | else if (parameters->get_size() == 64) |
61ba1cf9 | 1637 | { |
9025d29d ILT |
1638 | if (parameters->is_big_endian()) |
1639 | { | |
1640 | #ifdef HAVE_TARGET_64_BIG | |
9a2d6984 ILT |
1641 | this->sized_write_globals<64, true>(input_objects, sympool, |
1642 | dynpool, of); | |
9025d29d ILT |
1643 | #else |
1644 | gold_unreachable(); | |
1645 | #endif | |
1646 | } | |
61ba1cf9 | 1647 | else |
9025d29d ILT |
1648 | { |
1649 | #ifdef HAVE_TARGET_64_LITTLE | |
9a2d6984 ILT |
1650 | this->sized_write_globals<64, false>(input_objects, sympool, |
1651 | dynpool, of); | |
9025d29d ILT |
1652 | #else |
1653 | gold_unreachable(); | |
1654 | #endif | |
1655 | } | |
61ba1cf9 ILT |
1656 | } |
1657 | else | |
a3ad94ed | 1658 | gold_unreachable(); |
61ba1cf9 ILT |
1659 | } |
1660 | ||
1661 | // Write out the global symbols. | |
1662 | ||
1663 | template<int size, bool big_endian> | |
1664 | void | |
9a2d6984 | 1665 | Symbol_table::sized_write_globals(const Input_objects* input_objects, |
61ba1cf9 | 1666 | const Stringpool* sympool, |
16649710 | 1667 | const Stringpool* dynpool, |
61ba1cf9 ILT |
1668 | Output_file* of) const |
1669 | { | |
9a2d6984 ILT |
1670 | const Target* const target = input_objects->target(); |
1671 | ||
61ba1cf9 | 1672 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
c06b7b0b ILT |
1673 | unsigned int index = this->first_global_index_; |
1674 | const off_t oview_size = this->output_count_ * sym_size; | |
16649710 ILT |
1675 | unsigned char* const psyms = of->get_output_view(this->offset_, oview_size); |
1676 | ||
1677 | unsigned int dynamic_count = this->dynamic_count_; | |
1678 | off_t dynamic_size = dynamic_count * sym_size; | |
1679 | unsigned int first_dynamic_global_index = this->first_dynamic_global_index_; | |
1680 | unsigned char* dynamic_view; | |
1681 | if (this->dynamic_offset_ == 0) | |
1682 | dynamic_view = NULL; | |
1683 | else | |
1684 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); | |
c06b7b0b | 1685 | |
61ba1cf9 ILT |
1686 | unsigned char* ps = psyms; |
1687 | for (Symbol_table_type::const_iterator p = this->table_.begin(); | |
1688 | p != this->table_.end(); | |
1689 | ++p) | |
1690 | { | |
1691 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); | |
1692 | ||
9a2d6984 ILT |
1693 | // Possibly warn about unresolved symbols in shared libraries. |
1694 | this->warn_about_undefined_dynobj_symbol(input_objects, sym); | |
e2827e5f | 1695 | |
a3ad94ed | 1696 | unsigned int sym_index = sym->symtab_index(); |
16649710 ILT |
1697 | unsigned int dynsym_index; |
1698 | if (dynamic_view == NULL) | |
1699 | dynsym_index = -1U; | |
1700 | else | |
1701 | dynsym_index = sym->dynsym_index(); | |
1702 | ||
1703 | if (sym_index == -1U && dynsym_index == -1U) | |
a3ad94ed ILT |
1704 | { |
1705 | // This symbol is not included in the output file. | |
1706 | continue; | |
1707 | } | |
16649710 ILT |
1708 | |
1709 | if (sym_index == index) | |
1710 | ++index; | |
1711 | else if (sym_index != -1U) | |
a3ad94ed ILT |
1712 | { |
1713 | // We have already seen this symbol, because it has a | |
1714 | // default version. | |
1715 | gold_assert(sym_index < index); | |
16649710 ILT |
1716 | if (dynsym_index == -1U) |
1717 | continue; | |
1718 | sym_index = -1U; | |
a3ad94ed | 1719 | } |
c06b7b0b | 1720 | |
ead1e424 | 1721 | unsigned int shndx; |
ab5c9e90 | 1722 | typename elfcpp::Elf_types<32>::Elf_Addr value = sym->value(); |
ead1e424 ILT |
1723 | switch (sym->source()) |
1724 | { | |
1725 | case Symbol::FROM_OBJECT: | |
1726 | { | |
16649710 | 1727 | unsigned int in_shndx = sym->shndx(); |
ead1e424 ILT |
1728 | |
1729 | // FIXME: We need some target specific support here. | |
16649710 ILT |
1730 | if (in_shndx >= elfcpp::SHN_LORESERVE |
1731 | && in_shndx != elfcpp::SHN_ABS) | |
ead1e424 | 1732 | { |
75f2446e | 1733 | gold_error(_("%s: unsupported symbol section 0x%x"), |
a2b1aa12 | 1734 | sym->demangled_name().c_str(), in_shndx); |
75f2446e | 1735 | shndx = in_shndx; |
f6ce93d6 | 1736 | } |
ead1e424 ILT |
1737 | else |
1738 | { | |
75f2446e ILT |
1739 | Object* symobj = sym->object(); |
1740 | if (symobj->is_dynamic()) | |
1741 | { | |
1742 | if (sym->needs_dynsym_value()) | |
1743 | value = target->dynsym_value(sym); | |
1744 | shndx = elfcpp::SHN_UNDEF; | |
1745 | } | |
1746 | else if (in_shndx == elfcpp::SHN_UNDEF | |
1747 | || in_shndx == elfcpp::SHN_ABS) | |
1748 | shndx = in_shndx; | |
1749 | else | |
1750 | { | |
1751 | Relobj* relobj = static_cast<Relobj*>(symobj); | |
8383303e | 1752 | section_offset_type secoff; |
75f2446e ILT |
1753 | Output_section* os = relobj->output_section(in_shndx, |
1754 | &secoff); | |
1755 | gold_assert(os != NULL); | |
1756 | shndx = os->out_shndx(); | |
1757 | } | |
ead1e424 ILT |
1758 | } |
1759 | } | |
1760 | break; | |
1761 | ||
1762 | case Symbol::IN_OUTPUT_DATA: | |
1763 | shndx = sym->output_data()->out_shndx(); | |
1764 | break; | |
1765 | ||
1766 | case Symbol::IN_OUTPUT_SEGMENT: | |
1767 | shndx = elfcpp::SHN_ABS; | |
1768 | break; | |
1769 | ||
1770 | case Symbol::CONSTANT: | |
1771 | shndx = elfcpp::SHN_ABS; | |
1772 | break; | |
1773 | ||
1774 | default: | |
a3ad94ed | 1775 | gold_unreachable(); |
ead1e424 | 1776 | } |
61ba1cf9 | 1777 | |
16649710 ILT |
1778 | if (sym_index != -1U) |
1779 | { | |
6a469986 | 1780 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
ab5c9e90 | 1781 | sym, sym->value(), shndx, sympool, ps |
6a469986 | 1782 | SELECT_SIZE_ENDIAN(size, big_endian)); |
16649710 ILT |
1783 | ps += sym_size; |
1784 | } | |
61ba1cf9 | 1785 | |
16649710 ILT |
1786 | if (dynsym_index != -1U) |
1787 | { | |
1788 | dynsym_index -= first_dynamic_global_index; | |
1789 | gold_assert(dynsym_index < dynamic_count); | |
1790 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
6a469986 | 1791 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
ab5c9e90 | 1792 | sym, value, shndx, dynpool, pd |
6a469986 | 1793 | SELECT_SIZE_ENDIAN(size, big_endian)); |
16649710 | 1794 | } |
61ba1cf9 ILT |
1795 | } |
1796 | ||
a3ad94ed | 1797 | gold_assert(ps - psyms == oview_size); |
c06b7b0b ILT |
1798 | |
1799 | of->write_output_view(this->offset_, oview_size, psyms); | |
16649710 ILT |
1800 | if (dynamic_view != NULL) |
1801 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); | |
1802 | } | |
1803 | ||
1804 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the | |
1805 | // strtab holding the name. | |
1806 | ||
1807 | template<int size, bool big_endian> | |
1808 | void | |
ab5c9e90 ILT |
1809 | Symbol_table::sized_write_symbol( |
1810 | Sized_symbol<size>* sym, | |
1811 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
1812 | unsigned int shndx, | |
1813 | const Stringpool* pool, | |
1814 | unsigned char* p | |
1815 | ACCEPT_SIZE_ENDIAN) const | |
16649710 ILT |
1816 | { |
1817 | elfcpp::Sym_write<size, big_endian> osym(p); | |
1818 | osym.put_st_name(pool->get_offset(sym->name())); | |
ab5c9e90 | 1819 | osym.put_st_value(value); |
16649710 ILT |
1820 | osym.put_st_size(sym->symsize()); |
1821 | osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type())); | |
1822 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); | |
1823 | osym.put_st_shndx(shndx); | |
61ba1cf9 ILT |
1824 | } |
1825 | ||
9a2d6984 ILT |
1826 | // Check for unresolved symbols in shared libraries. This is |
1827 | // controlled by the --allow-shlib-undefined option. | |
1828 | ||
1829 | // We only warn about libraries for which we have seen all the | |
1830 | // DT_NEEDED entries. We don't try to track down DT_NEEDED entries | |
1831 | // which were not seen in this link. If we didn't see a DT_NEEDED | |
1832 | // entry, we aren't going to be able to reliably report whether the | |
1833 | // symbol is undefined. | |
1834 | ||
1835 | // We also don't warn about libraries found in the system library | |
1836 | // directory (the directory were we find libc.so); we assume that | |
1837 | // those libraries are OK. This heuristic avoids problems in | |
1838 | // GNU/Linux, in which -ldl can have undefined references satisfied by | |
1839 | // ld-linux.so. | |
1840 | ||
1841 | inline void | |
1842 | Symbol_table::warn_about_undefined_dynobj_symbol( | |
1843 | const Input_objects* input_objects, | |
1844 | Symbol* sym) const | |
1845 | { | |
1846 | if (sym->source() == Symbol::FROM_OBJECT | |
1847 | && sym->object()->is_dynamic() | |
1848 | && sym->shndx() == elfcpp::SHN_UNDEF | |
1849 | && sym->binding() != elfcpp::STB_WEAK | |
1850 | && !parameters->allow_shlib_undefined() | |
1851 | && !input_objects->target()->is_defined_by_abi(sym) | |
1852 | && !input_objects->found_in_system_library_directory(sym->object())) | |
1853 | { | |
1854 | // A very ugly cast. | |
1855 | Dynobj* dynobj = static_cast<Dynobj*>(sym->object()); | |
1856 | if (!dynobj->has_unknown_needed_entries()) | |
1857 | gold_error(_("%s: undefined reference to '%s'"), | |
a2b1aa12 ILT |
1858 | sym->object()->name().c_str(), |
1859 | sym->demangled_name().c_str()); | |
9a2d6984 ILT |
1860 | } |
1861 | } | |
1862 | ||
a3ad94ed ILT |
1863 | // Write out a section symbol. Return the update offset. |
1864 | ||
1865 | void | |
9025d29d | 1866 | Symbol_table::write_section_symbol(const Output_section *os, |
a3ad94ed ILT |
1867 | Output_file* of, |
1868 | off_t offset) const | |
1869 | { | |
9025d29d | 1870 | if (parameters->get_size() == 32) |
a3ad94ed | 1871 | { |
9025d29d ILT |
1872 | if (parameters->is_big_endian()) |
1873 | { | |
1874 | #ifdef HAVE_TARGET_32_BIG | |
1875 | this->sized_write_section_symbol<32, true>(os, of, offset); | |
1876 | #else | |
1877 | gold_unreachable(); | |
1878 | #endif | |
1879 | } | |
a3ad94ed | 1880 | else |
9025d29d ILT |
1881 | { |
1882 | #ifdef HAVE_TARGET_32_LITTLE | |
1883 | this->sized_write_section_symbol<32, false>(os, of, offset); | |
1884 | #else | |
1885 | gold_unreachable(); | |
1886 | #endif | |
1887 | } | |
a3ad94ed | 1888 | } |
9025d29d | 1889 | else if (parameters->get_size() == 64) |
a3ad94ed | 1890 | { |
9025d29d ILT |
1891 | if (parameters->is_big_endian()) |
1892 | { | |
1893 | #ifdef HAVE_TARGET_64_BIG | |
1894 | this->sized_write_section_symbol<64, true>(os, of, offset); | |
1895 | #else | |
1896 | gold_unreachable(); | |
1897 | #endif | |
1898 | } | |
a3ad94ed | 1899 | else |
9025d29d ILT |
1900 | { |
1901 | #ifdef HAVE_TARGET_64_LITTLE | |
1902 | this->sized_write_section_symbol<64, false>(os, of, offset); | |
1903 | #else | |
1904 | gold_unreachable(); | |
1905 | #endif | |
1906 | } | |
a3ad94ed ILT |
1907 | } |
1908 | else | |
1909 | gold_unreachable(); | |
1910 | } | |
1911 | ||
1912 | // Write out a section symbol, specialized for size and endianness. | |
1913 | ||
1914 | template<int size, bool big_endian> | |
1915 | void | |
1916 | Symbol_table::sized_write_section_symbol(const Output_section* os, | |
1917 | Output_file* of, | |
1918 | off_t offset) const | |
1919 | { | |
1920 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1921 | ||
1922 | unsigned char* pov = of->get_output_view(offset, sym_size); | |
1923 | ||
1924 | elfcpp::Sym_write<size, big_endian> osym(pov); | |
1925 | osym.put_st_name(0); | |
1926 | osym.put_st_value(os->address()); | |
1927 | osym.put_st_size(0); | |
1928 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, | |
1929 | elfcpp::STT_SECTION)); | |
1930 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); | |
1931 | osym.put_st_shndx(os->out_shndx()); | |
1932 | ||
1933 | of->write_output_view(offset, sym_size, pov); | |
1934 | } | |
1935 | ||
abaa3995 ILT |
1936 | // Print statistical information to stderr. This is used for --stats. |
1937 | ||
1938 | void | |
1939 | Symbol_table::print_stats() const | |
1940 | { | |
1941 | #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP) | |
1942 | fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"), | |
1943 | program_name, this->table_.size(), this->table_.bucket_count()); | |
1944 | #else | |
1945 | fprintf(stderr, _("%s: symbol table entries: %zu\n"), | |
1946 | program_name, this->table_.size()); | |
1947 | #endif | |
ad8f37d1 | 1948 | this->namepool_.print_stats("symbol table stringpool"); |
abaa3995 ILT |
1949 | } |
1950 | ||
ff541f30 ILT |
1951 | // We check for ODR violations by looking for symbols with the same |
1952 | // name for which the debugging information reports that they were | |
1953 | // defined in different source locations. When comparing the source | |
1954 | // location, we consider instances with the same base filename and | |
1955 | // line number to be the same. This is because different object | |
1956 | // files/shared libraries can include the same header file using | |
1957 | // different paths, and we don't want to report an ODR violation in | |
1958 | // that case. | |
1959 | ||
1960 | // This struct is used to compare line information, as returned by | |
7bf1f802 | 1961 | // Dwarf_line_info::one_addr2line. It implements a < comparison |
ff541f30 ILT |
1962 | // operator used with std::set. |
1963 | ||
1964 | struct Odr_violation_compare | |
1965 | { | |
1966 | bool | |
1967 | operator()(const std::string& s1, const std::string& s2) const | |
1968 | { | |
1969 | std::string::size_type pos1 = s1.rfind('/'); | |
1970 | std::string::size_type pos2 = s2.rfind('/'); | |
1971 | if (pos1 == std::string::npos | |
1972 | || pos2 == std::string::npos) | |
1973 | return s1 < s2; | |
1974 | return s1.compare(pos1, std::string::npos, | |
1975 | s2, pos2, std::string::npos) < 0; | |
1976 | } | |
1977 | }; | |
1978 | ||
70e654ba ILT |
1979 | // Check candidate_odr_violations_ to find symbols with the same name |
1980 | // but apparently different definitions (different source-file/line-no). | |
1981 | ||
1982 | void | |
17a1d0a9 ILT |
1983 | Symbol_table::detect_odr_violations(const Task* task, |
1984 | const char* output_file_name) const | |
70e654ba ILT |
1985 | { |
1986 | for (Odr_map::const_iterator it = candidate_odr_violations_.begin(); | |
1987 | it != candidate_odr_violations_.end(); | |
1988 | ++it) | |
1989 | { | |
1990 | const char* symbol_name = it->first; | |
1991 | // We use a sorted set so the output is deterministic. | |
ff541f30 | 1992 | std::set<std::string, Odr_violation_compare> line_nums; |
70e654ba | 1993 | |
b01c0a4a ILT |
1994 | for (Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator |
1995 | locs = it->second.begin(); | |
1996 | locs != it->second.end(); | |
1997 | ++locs) | |
70e654ba ILT |
1998 | { |
1999 | // We need to lock the object in order to read it. This | |
17a1d0a9 ILT |
2000 | // means that we have to run in a singleton Task. If we |
2001 | // want to run this in a general Task for better | |
2002 | // performance, we will need one Task for object, plus | |
2003 | // appropriate locking to ensure that we don't conflict with | |
2004 | // other uses of the object. | |
2005 | Task_lock_obj<Object> tl(task, locs->object); | |
a55ce7fe ILT |
2006 | std::string lineno = Dwarf_line_info::one_addr2line( |
2007 | locs->object, locs->shndx, locs->offset); | |
70e654ba ILT |
2008 | if (!lineno.empty()) |
2009 | line_nums.insert(lineno); | |
2010 | } | |
2011 | ||
2012 | if (line_nums.size() > 1) | |
2013 | { | |
dd8670e5 | 2014 | gold_warning(_("while linking %s: symbol '%s' defined in multiple " |
78f15696 | 2015 | "places (possible ODR violation):"), |
a2b1aa12 | 2016 | output_file_name, demangle(symbol_name).c_str()); |
70e654ba ILT |
2017 | for (std::set<std::string>::const_iterator it2 = line_nums.begin(); |
2018 | it2 != line_nums.end(); | |
2019 | ++it2) | |
2020 | fprintf(stderr, " %s\n", it2->c_str()); | |
2021 | } | |
2022 | } | |
2023 | } | |
2024 | ||
f6ce93d6 ILT |
2025 | // Warnings functions. |
2026 | ||
2027 | // Add a new warning. | |
2028 | ||
2029 | void | |
2030 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, | |
cb295612 | 2031 | const std::string& warning) |
f6ce93d6 ILT |
2032 | { |
2033 | name = symtab->canonicalize_name(name); | |
cb295612 | 2034 | this->warnings_[name].set(obj, warning); |
f6ce93d6 ILT |
2035 | } |
2036 | ||
2037 | // Look through the warnings and mark the symbols for which we should | |
2038 | // warn. This is called during Layout::finalize when we know the | |
2039 | // sources for all the symbols. | |
2040 | ||
2041 | void | |
cb295612 | 2042 | Warnings::note_warnings(Symbol_table* symtab) |
f6ce93d6 ILT |
2043 | { |
2044 | for (Warning_table::iterator p = this->warnings_.begin(); | |
2045 | p != this->warnings_.end(); | |
2046 | ++p) | |
2047 | { | |
2048 | Symbol* sym = symtab->lookup(p->first, NULL); | |
2049 | if (sym != NULL | |
2050 | && sym->source() == Symbol::FROM_OBJECT | |
2051 | && sym->object() == p->second.object) | |
cb295612 | 2052 | sym->set_has_warning(); |
f6ce93d6 ILT |
2053 | } |
2054 | } | |
2055 | ||
2056 | // Issue a warning. This is called when we see a relocation against a | |
2057 | // symbol for which has a warning. | |
2058 | ||
75f2446e | 2059 | template<int size, bool big_endian> |
f6ce93d6 | 2060 | void |
75f2446e ILT |
2061 | Warnings::issue_warning(const Symbol* sym, |
2062 | const Relocate_info<size, big_endian>* relinfo, | |
2063 | size_t relnum, off_t reloffset) const | |
f6ce93d6 | 2064 | { |
a3ad94ed | 2065 | gold_assert(sym->has_warning()); |
f6ce93d6 | 2066 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
a3ad94ed | 2067 | gold_assert(p != this->warnings_.end()); |
75f2446e ILT |
2068 | gold_warning_at_location(relinfo, relnum, reloffset, |
2069 | "%s", p->second.text.c_str()); | |
f6ce93d6 ILT |
2070 | } |
2071 | ||
14bfc3f5 ILT |
2072 | // Instantiate the templates we need. We could use the configure |
2073 | // script to restrict this to only the ones needed for implemented | |
2074 | // targets. | |
2075 | ||
c7912668 ILT |
2076 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
2077 | template | |
2078 | void | |
2079 | Sized_symbol<32>::allocate_common(Output_data*, Value_type); | |
2080 | #endif | |
2081 | ||
2082 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
2083 | template | |
2084 | void | |
2085 | Sized_symbol<64>::allocate_common(Output_data*, Value_type); | |
2086 | #endif | |
2087 | ||
193a53d9 | 2088 | #ifdef HAVE_TARGET_32_LITTLE |
14bfc3f5 ILT |
2089 | template |
2090 | void | |
193a53d9 ILT |
2091 | Symbol_table::add_from_relobj<32, false>( |
2092 | Sized_relobj<32, false>* relobj, | |
f6ce93d6 | 2093 | const unsigned char* syms, |
14bfc3f5 ILT |
2094 | size_t count, |
2095 | const char* sym_names, | |
2096 | size_t sym_name_size, | |
730cdc88 | 2097 | Sized_relobj<32, true>::Symbols* sympointers); |
193a53d9 | 2098 | #endif |
14bfc3f5 | 2099 | |
193a53d9 | 2100 | #ifdef HAVE_TARGET_32_BIG |
14bfc3f5 ILT |
2101 | template |
2102 | void | |
193a53d9 ILT |
2103 | Symbol_table::add_from_relobj<32, true>( |
2104 | Sized_relobj<32, true>* relobj, | |
f6ce93d6 | 2105 | const unsigned char* syms, |
14bfc3f5 ILT |
2106 | size_t count, |
2107 | const char* sym_names, | |
2108 | size_t sym_name_size, | |
730cdc88 | 2109 | Sized_relobj<32, false>::Symbols* sympointers); |
193a53d9 | 2110 | #endif |
14bfc3f5 | 2111 | |
193a53d9 | 2112 | #ifdef HAVE_TARGET_64_LITTLE |
14bfc3f5 ILT |
2113 | template |
2114 | void | |
193a53d9 ILT |
2115 | Symbol_table::add_from_relobj<64, false>( |
2116 | Sized_relobj<64, false>* relobj, | |
f6ce93d6 | 2117 | const unsigned char* syms, |
14bfc3f5 ILT |
2118 | size_t count, |
2119 | const char* sym_names, | |
2120 | size_t sym_name_size, | |
730cdc88 | 2121 | Sized_relobj<64, true>::Symbols* sympointers); |
193a53d9 | 2122 | #endif |
14bfc3f5 | 2123 | |
193a53d9 | 2124 | #ifdef HAVE_TARGET_64_BIG |
14bfc3f5 ILT |
2125 | template |
2126 | void | |
193a53d9 ILT |
2127 | Symbol_table::add_from_relobj<64, true>( |
2128 | Sized_relobj<64, true>* relobj, | |
f6ce93d6 | 2129 | const unsigned char* syms, |
14bfc3f5 ILT |
2130 | size_t count, |
2131 | const char* sym_names, | |
2132 | size_t sym_name_size, | |
730cdc88 | 2133 | Sized_relobj<64, false>::Symbols* sympointers); |
193a53d9 | 2134 | #endif |
14bfc3f5 | 2135 | |
193a53d9 | 2136 | #ifdef HAVE_TARGET_32_LITTLE |
dbe717ef ILT |
2137 | template |
2138 | void | |
193a53d9 ILT |
2139 | Symbol_table::add_from_dynobj<32, false>( |
2140 | Sized_dynobj<32, false>* dynobj, | |
dbe717ef ILT |
2141 | const unsigned char* syms, |
2142 | size_t count, | |
2143 | const char* sym_names, | |
2144 | size_t sym_name_size, | |
2145 | const unsigned char* versym, | |
2146 | size_t versym_size, | |
2147 | const std::vector<const char*>* version_map); | |
193a53d9 | 2148 | #endif |
dbe717ef | 2149 | |
193a53d9 | 2150 | #ifdef HAVE_TARGET_32_BIG |
dbe717ef ILT |
2151 | template |
2152 | void | |
193a53d9 ILT |
2153 | Symbol_table::add_from_dynobj<32, true>( |
2154 | Sized_dynobj<32, true>* dynobj, | |
dbe717ef ILT |
2155 | const unsigned char* syms, |
2156 | size_t count, | |
2157 | const char* sym_names, | |
2158 | size_t sym_name_size, | |
2159 | const unsigned char* versym, | |
2160 | size_t versym_size, | |
2161 | const std::vector<const char*>* version_map); | |
193a53d9 | 2162 | #endif |
dbe717ef | 2163 | |
193a53d9 | 2164 | #ifdef HAVE_TARGET_64_LITTLE |
dbe717ef ILT |
2165 | template |
2166 | void | |
193a53d9 ILT |
2167 | Symbol_table::add_from_dynobj<64, false>( |
2168 | Sized_dynobj<64, false>* dynobj, | |
dbe717ef ILT |
2169 | const unsigned char* syms, |
2170 | size_t count, | |
2171 | const char* sym_names, | |
2172 | size_t sym_name_size, | |
2173 | const unsigned char* versym, | |
2174 | size_t versym_size, | |
2175 | const std::vector<const char*>* version_map); | |
193a53d9 | 2176 | #endif |
dbe717ef | 2177 | |
193a53d9 | 2178 | #ifdef HAVE_TARGET_64_BIG |
dbe717ef ILT |
2179 | template |
2180 | void | |
193a53d9 ILT |
2181 | Symbol_table::add_from_dynobj<64, true>( |
2182 | Sized_dynobj<64, true>* dynobj, | |
dbe717ef ILT |
2183 | const unsigned char* syms, |
2184 | size_t count, | |
2185 | const char* sym_names, | |
2186 | size_t sym_name_size, | |
2187 | const unsigned char* versym, | |
2188 | size_t versym_size, | |
2189 | const std::vector<const char*>* version_map); | |
193a53d9 | 2190 | #endif |
dbe717ef | 2191 | |
46fe1623 ILT |
2192 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
2193 | template | |
2194 | void | |
fe8718a4 ILT |
2195 | Symbol_table::define_with_copy_reloc<32>( |
2196 | const Target* target, | |
2197 | Sized_symbol<32>* sym, | |
2198 | Output_data* posd, | |
2199 | elfcpp::Elf_types<32>::Elf_Addr value); | |
46fe1623 ILT |
2200 | #endif |
2201 | ||
2202 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
2203 | template | |
2204 | void | |
fe8718a4 ILT |
2205 | Symbol_table::define_with_copy_reloc<64>( |
2206 | const Target* target, | |
2207 | Sized_symbol<64>* sym, | |
2208 | Output_data* posd, | |
2209 | elfcpp::Elf_types<64>::Elf_Addr value); | |
46fe1623 ILT |
2210 | #endif |
2211 | ||
75f2446e ILT |
2212 | #ifdef HAVE_TARGET_32_LITTLE |
2213 | template | |
2214 | void | |
2215 | Warnings::issue_warning<32, false>(const Symbol* sym, | |
2216 | const Relocate_info<32, false>* relinfo, | |
2217 | size_t relnum, off_t reloffset) const; | |
2218 | #endif | |
2219 | ||
2220 | #ifdef HAVE_TARGET_32_BIG | |
2221 | template | |
2222 | void | |
2223 | Warnings::issue_warning<32, true>(const Symbol* sym, | |
2224 | const Relocate_info<32, true>* relinfo, | |
2225 | size_t relnum, off_t reloffset) const; | |
2226 | #endif | |
2227 | ||
2228 | #ifdef HAVE_TARGET_64_LITTLE | |
2229 | template | |
2230 | void | |
2231 | Warnings::issue_warning<64, false>(const Symbol* sym, | |
2232 | const Relocate_info<64, false>* relinfo, | |
2233 | size_t relnum, off_t reloffset) const; | |
2234 | #endif | |
2235 | ||
2236 | #ifdef HAVE_TARGET_64_BIG | |
2237 | template | |
2238 | void | |
2239 | Warnings::issue_warning<64, true>(const Symbol* sym, | |
2240 | const Relocate_info<64, true>* relinfo, | |
2241 | size_t relnum, off_t reloffset) const; | |
2242 | #endif | |
2243 | ||
14bfc3f5 | 2244 | } // End namespace gold. |