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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; |
55a93433 | 73 | this->is_forced_local_ = false; |
ead1e424 ILT |
74 | } |
75 | ||
a2b1aa12 ILT |
76 | // Return the demangled version of the symbol's name, but only |
77 | // if the --demangle flag was set. | |
78 | ||
79 | static std::string | |
80 | demangle(const char* name) | |
81 | { | |
ff541f30 ILT |
82 | if (!parameters->demangle()) |
83 | return name; | |
84 | ||
a2b1aa12 ILT |
85 | // cplus_demangle allocates memory for the result it returns, |
86 | // and returns NULL if the name is already demangled. | |
87 | char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS); | |
88 | if (demangled_name == NULL) | |
89 | return name; | |
90 | ||
91 | std::string retval(demangled_name); | |
92 | free(demangled_name); | |
93 | return retval; | |
94 | } | |
95 | ||
96 | std::string | |
97 | Symbol::demangled_name() const | |
98 | { | |
ff541f30 | 99 | return demangle(this->name()); |
a2b1aa12 ILT |
100 | } |
101 | ||
ead1e424 ILT |
102 | // Initialize the fields in the base class Symbol for SYM in OBJECT. |
103 | ||
104 | template<int size, bool big_endian> | |
105 | void | |
106 | Symbol::init_base(const char* name, const char* version, Object* object, | |
107 | const elfcpp::Sym<size, big_endian>& sym) | |
108 | { | |
109 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), | |
110 | sym.get_st_visibility(), sym.get_st_nonvis()); | |
111 | this->u_.from_object.object = object; | |
112 | // FIXME: Handle SHN_XINDEX. | |
16649710 | 113 | this->u_.from_object.shndx = sym.get_st_shndx(); |
ead1e424 | 114 | this->source_ = FROM_OBJECT; |
008db82e | 115 | this->in_reg_ = !object->is_dynamic(); |
1564db8d | 116 | this->in_dyn_ = object->is_dynamic(); |
14bfc3f5 ILT |
117 | } |
118 | ||
ead1e424 ILT |
119 | // Initialize the fields in the base class Symbol for a symbol defined |
120 | // in an Output_data. | |
121 | ||
122 | void | |
123 | Symbol::init_base(const char* name, Output_data* od, elfcpp::STT type, | |
124 | elfcpp::STB binding, elfcpp::STV visibility, | |
125 | unsigned char nonvis, bool offset_is_from_end) | |
126 | { | |
127 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
128 | this->u_.in_output_data.output_data = od; | |
129 | this->u_.in_output_data.offset_is_from_end = offset_is_from_end; | |
130 | this->source_ = IN_OUTPUT_DATA; | |
008db82e | 131 | this->in_reg_ = true; |
ead1e424 ILT |
132 | } |
133 | ||
134 | // Initialize the fields in the base class Symbol for a symbol defined | |
135 | // in an Output_segment. | |
136 | ||
137 | void | |
138 | Symbol::init_base(const char* name, Output_segment* os, elfcpp::STT type, | |
139 | elfcpp::STB binding, elfcpp::STV visibility, | |
140 | unsigned char nonvis, Segment_offset_base offset_base) | |
141 | { | |
142 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
143 | this->u_.in_output_segment.output_segment = os; | |
144 | this->u_.in_output_segment.offset_base = offset_base; | |
145 | this->source_ = IN_OUTPUT_SEGMENT; | |
008db82e | 146 | this->in_reg_ = true; |
ead1e424 ILT |
147 | } |
148 | ||
149 | // Initialize the fields in the base class Symbol for a symbol defined | |
150 | // as a constant. | |
151 | ||
152 | void | |
153 | Symbol::init_base(const char* name, elfcpp::STT type, | |
154 | elfcpp::STB binding, elfcpp::STV visibility, | |
155 | unsigned char nonvis) | |
156 | { | |
157 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
158 | this->source_ = CONSTANT; | |
008db82e | 159 | this->in_reg_ = true; |
ead1e424 ILT |
160 | } |
161 | ||
c7912668 ILT |
162 | // Allocate a common symbol in the base. |
163 | ||
164 | void | |
165 | Symbol::allocate_base_common(Output_data* od) | |
166 | { | |
167 | gold_assert(this->is_common()); | |
168 | this->source_ = IN_OUTPUT_DATA; | |
169 | this->u_.in_output_data.output_data = od; | |
170 | this->u_.in_output_data.offset_is_from_end = false; | |
171 | } | |
172 | ||
ead1e424 | 173 | // Initialize the fields in Sized_symbol for SYM in OBJECT. |
14bfc3f5 ILT |
174 | |
175 | template<int size> | |
176 | template<bool big_endian> | |
177 | void | |
178 | Sized_symbol<size>::init(const char* name, const char* version, Object* object, | |
179 | const elfcpp::Sym<size, big_endian>& sym) | |
180 | { | |
181 | this->init_base(name, version, object, sym); | |
182 | this->value_ = sym.get_st_value(); | |
ead1e424 ILT |
183 | this->symsize_ = sym.get_st_size(); |
184 | } | |
185 | ||
186 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
187 | // Output_data. | |
188 | ||
189 | template<int size> | |
190 | void | |
191 | Sized_symbol<size>::init(const char* name, Output_data* od, | |
192 | Value_type value, Size_type symsize, | |
193 | elfcpp::STT type, elfcpp::STB binding, | |
194 | elfcpp::STV visibility, unsigned char nonvis, | |
195 | bool offset_is_from_end) | |
196 | { | |
197 | this->init_base(name, od, type, binding, visibility, nonvis, | |
198 | offset_is_from_end); | |
199 | this->value_ = value; | |
200 | this->symsize_ = symsize; | |
201 | } | |
202 | ||
203 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
204 | // Output_segment. | |
205 | ||
206 | template<int size> | |
207 | void | |
208 | Sized_symbol<size>::init(const char* name, Output_segment* os, | |
209 | Value_type value, Size_type symsize, | |
210 | elfcpp::STT type, elfcpp::STB binding, | |
211 | elfcpp::STV visibility, unsigned char nonvis, | |
212 | Segment_offset_base offset_base) | |
213 | { | |
214 | this->init_base(name, os, type, binding, visibility, nonvis, offset_base); | |
215 | this->value_ = value; | |
216 | this->symsize_ = symsize; | |
217 | } | |
218 | ||
219 | // Initialize the fields in Sized_symbol for a symbol defined as a | |
220 | // constant. | |
221 | ||
222 | template<int size> | |
223 | void | |
224 | Sized_symbol<size>::init(const char* name, Value_type value, Size_type symsize, | |
225 | elfcpp::STT type, elfcpp::STB binding, | |
226 | elfcpp::STV visibility, unsigned char nonvis) | |
227 | { | |
228 | this->init_base(name, type, binding, visibility, nonvis); | |
229 | this->value_ = value; | |
230 | this->symsize_ = symsize; | |
14bfc3f5 ILT |
231 | } |
232 | ||
c7912668 ILT |
233 | // Allocate a common symbol. |
234 | ||
235 | template<int size> | |
236 | void | |
237 | Sized_symbol<size>::allocate_common(Output_data* od, Value_type value) | |
238 | { | |
239 | this->allocate_base_common(od); | |
240 | this->value_ = value; | |
241 | } | |
242 | ||
436ca963 ILT |
243 | // Return true if this symbol should be added to the dynamic symbol |
244 | // table. | |
245 | ||
246 | inline bool | |
247 | Symbol::should_add_dynsym_entry() const | |
248 | { | |
249 | // If the symbol is used by a dynamic relocation, we need to add it. | |
250 | if (this->needs_dynsym_entry()) | |
251 | return true; | |
252 | ||
55a93433 ILT |
253 | // If the symbol was forced local in a version script, do not add it. |
254 | if (this->is_forced_local()) | |
255 | return false; | |
256 | ||
436ca963 ILT |
257 | // If exporting all symbols or building a shared library, |
258 | // and the symbol is defined in a regular object and is | |
259 | // externally visible, we need to add it. | |
260 | if ((parameters->export_dynamic() || parameters->output_is_shared()) | |
261 | && !this->is_from_dynobj() | |
262 | && this->is_externally_visible()) | |
263 | return true; | |
264 | ||
265 | return false; | |
266 | } | |
267 | ||
b3b74ddc ILT |
268 | // Return true if the final value of this symbol is known at link |
269 | // time. | |
270 | ||
271 | bool | |
272 | Symbol::final_value_is_known() const | |
273 | { | |
274 | // If we are not generating an executable, then no final values are | |
275 | // known, since they will change at runtime. | |
276 | if (!parameters->output_is_executable()) | |
277 | return false; | |
278 | ||
279 | // If the symbol is not from an object file, then it is defined, and | |
280 | // known. | |
281 | if (this->source_ != FROM_OBJECT) | |
282 | return true; | |
283 | ||
284 | // If the symbol is from a dynamic object, then the final value is | |
285 | // not known. | |
286 | if (this->object()->is_dynamic()) | |
287 | return false; | |
288 | ||
289 | // If the symbol is not undefined (it is defined or common), then | |
290 | // the final value is known. | |
291 | if (!this->is_undefined()) | |
292 | return true; | |
293 | ||
294 | // If the symbol is undefined, then whether the final value is known | |
295 | // depends on whether we are doing a static link. If we are doing a | |
296 | // dynamic link, then the final value could be filled in at runtime. | |
297 | // This could reasonably be the case for a weak undefined symbol. | |
298 | return parameters->doing_static_link(); | |
299 | } | |
300 | ||
14bfc3f5 ILT |
301 | // Class Symbol_table. |
302 | ||
09124467 ILT |
303 | Symbol_table::Symbol_table(unsigned int count, |
304 | const Version_script_info& version_script) | |
6d013333 | 305 | : saw_undefined_(0), offset_(0), table_(count), namepool_(), |
55a93433 ILT |
306 | forwarders_(), commons_(), forced_locals_(), warnings_(), |
307 | version_script_(version_script) | |
14bfc3f5 | 308 | { |
6d013333 | 309 | namepool_.reserve(count); |
14bfc3f5 ILT |
310 | } |
311 | ||
312 | Symbol_table::~Symbol_table() | |
313 | { | |
314 | } | |
315 | ||
ad8f37d1 | 316 | // The hash function. The key values are Stringpool keys. |
14bfc3f5 | 317 | |
ad8f37d1 | 318 | inline size_t |
14bfc3f5 ILT |
319 | Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const |
320 | { | |
f0641a0b | 321 | return key.first ^ key.second; |
14bfc3f5 ILT |
322 | } |
323 | ||
ad8f37d1 ILT |
324 | // The symbol table key equality function. This is called with |
325 | // Stringpool keys. | |
14bfc3f5 | 326 | |
ad8f37d1 | 327 | inline bool |
14bfc3f5 ILT |
328 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, |
329 | const Symbol_table_key& k2) const | |
330 | { | |
331 | return k1.first == k2.first && k1.second == k2.second; | |
332 | } | |
333 | ||
dd8670e5 | 334 | // Make TO a symbol which forwards to FROM. |
14bfc3f5 ILT |
335 | |
336 | void | |
337 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) | |
338 | { | |
a3ad94ed ILT |
339 | gold_assert(from != to); |
340 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); | |
14bfc3f5 ILT |
341 | this->forwarders_[from] = to; |
342 | from->set_forwarder(); | |
343 | } | |
344 | ||
61ba1cf9 ILT |
345 | // Resolve the forwards from FROM, returning the real symbol. |
346 | ||
14bfc3f5 | 347 | Symbol* |
c06b7b0b | 348 | Symbol_table::resolve_forwards(const Symbol* from) const |
14bfc3f5 | 349 | { |
a3ad94ed | 350 | gold_assert(from->is_forwarder()); |
c06b7b0b | 351 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
14bfc3f5 | 352 | this->forwarders_.find(from); |
a3ad94ed | 353 | gold_assert(p != this->forwarders_.end()); |
14bfc3f5 ILT |
354 | return p->second; |
355 | } | |
356 | ||
61ba1cf9 ILT |
357 | // Look up a symbol by name. |
358 | ||
359 | Symbol* | |
360 | Symbol_table::lookup(const char* name, const char* version) const | |
361 | { | |
f0641a0b ILT |
362 | Stringpool::Key name_key; |
363 | name = this->namepool_.find(name, &name_key); | |
61ba1cf9 ILT |
364 | if (name == NULL) |
365 | return NULL; | |
f0641a0b ILT |
366 | |
367 | Stringpool::Key version_key = 0; | |
61ba1cf9 ILT |
368 | if (version != NULL) |
369 | { | |
f0641a0b | 370 | version = this->namepool_.find(version, &version_key); |
61ba1cf9 ILT |
371 | if (version == NULL) |
372 | return NULL; | |
373 | } | |
374 | ||
f0641a0b | 375 | Symbol_table_key key(name_key, version_key); |
61ba1cf9 ILT |
376 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
377 | if (p == this->table_.end()) | |
378 | return NULL; | |
379 | return p->second; | |
380 | } | |
381 | ||
14bfc3f5 ILT |
382 | // Resolve a Symbol with another Symbol. This is only used in the |
383 | // unusual case where there are references to both an unversioned | |
384 | // symbol and a symbol with a version, and we then discover that that | |
1564db8d ILT |
385 | // version is the default version. Because this is unusual, we do |
386 | // this the slow way, by converting back to an ELF symbol. | |
14bfc3f5 | 387 | |
1564db8d | 388 | template<int size, bool big_endian> |
14bfc3f5 | 389 | void |
14b31740 ILT |
390 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from, |
391 | const char* version ACCEPT_SIZE_ENDIAN) | |
14bfc3f5 | 392 | { |
1564db8d ILT |
393 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
394 | elfcpp::Sym_write<size, big_endian> esym(buf); | |
395 | // We don't bother to set the st_name field. | |
396 | esym.put_st_value(from->value()); | |
397 | esym.put_st_size(from->symsize()); | |
398 | esym.put_st_info(from->binding(), from->type()); | |
ead1e424 | 399 | esym.put_st_other(from->visibility(), from->nonvis()); |
16649710 | 400 | esym.put_st_shndx(from->shndx()); |
70e654ba | 401 | this->resolve(to, esym.sym(), esym.sym(), from->object(), version); |
1ebd95fd ILT |
402 | if (from->in_reg()) |
403 | to->set_in_reg(); | |
404 | if (from->in_dyn()) | |
405 | to->set_in_dyn(); | |
14bfc3f5 ILT |
406 | } |
407 | ||
55a93433 ILT |
408 | // Record that a symbol is forced to be local by a version script. |
409 | ||
410 | void | |
411 | Symbol_table::force_local(Symbol* sym) | |
412 | { | |
413 | if (!sym->is_defined() && !sym->is_common()) | |
414 | return; | |
415 | if (sym->is_forced_local()) | |
416 | { | |
417 | // We already got this one. | |
418 | return; | |
419 | } | |
420 | sym->set_is_forced_local(); | |
421 | this->forced_locals_.push_back(sym); | |
422 | } | |
423 | ||
14bfc3f5 ILT |
424 | // Add one symbol from OBJECT to the symbol table. NAME is symbol |
425 | // name and VERSION is the version; both are canonicalized. DEF is | |
426 | // whether this is the default version. | |
427 | ||
428 | // If DEF is true, then this is the definition of a default version of | |
429 | // a symbol. That means that any lookup of NAME/NULL and any lookup | |
430 | // of NAME/VERSION should always return the same symbol. This is | |
431 | // obvious for references, but in particular we want to do this for | |
432 | // definitions: overriding NAME/NULL should also override | |
433 | // NAME/VERSION. If we don't do that, it would be very hard to | |
434 | // override functions in a shared library which uses versioning. | |
435 | ||
436 | // We implement this by simply making both entries in the hash table | |
437 | // point to the same Symbol structure. That is easy enough if this is | |
438 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible | |
439 | // that we have seen both already, in which case they will both have | |
440 | // independent entries in the symbol table. We can't simply change | |
441 | // the symbol table entry, because we have pointers to the entries | |
442 | // attached to the object files. So we mark the entry attached to the | |
443 | // object file as a forwarder, and record it in the forwarders_ map. | |
444 | // Note that entries in the hash table will never be marked as | |
445 | // forwarders. | |
70e654ba ILT |
446 | // |
447 | // SYM and ORIG_SYM are almost always the same. ORIG_SYM is the | |
448 | // symbol exactly as it existed in the input file. SYM is usually | |
449 | // that as well, but can be modified, for instance if we determine | |
450 | // it's in a to-be-discarded section. | |
14bfc3f5 ILT |
451 | |
452 | template<int size, bool big_endian> | |
aeddab66 | 453 | Sized_symbol<size>* |
f6ce93d6 | 454 | Symbol_table::add_from_object(Object* object, |
14bfc3f5 | 455 | const char *name, |
f0641a0b ILT |
456 | Stringpool::Key name_key, |
457 | const char *version, | |
458 | Stringpool::Key version_key, | |
459 | bool def, | |
70e654ba ILT |
460 | const elfcpp::Sym<size, big_endian>& sym, |
461 | const elfcpp::Sym<size, big_endian>& orig_sym) | |
14bfc3f5 ILT |
462 | { |
463 | Symbol* const snull = NULL; | |
464 | std::pair<typename Symbol_table_type::iterator, bool> ins = | |
f0641a0b ILT |
465 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
466 | snull)); | |
14bfc3f5 ILT |
467 | |
468 | std::pair<typename Symbol_table_type::iterator, bool> insdef = | |
469 | std::make_pair(this->table_.end(), false); | |
470 | if (def) | |
471 | { | |
f0641a0b ILT |
472 | const Stringpool::Key vnull_key = 0; |
473 | insdef = this->table_.insert(std::make_pair(std::make_pair(name_key, | |
474 | vnull_key), | |
14bfc3f5 ILT |
475 | snull)); |
476 | } | |
477 | ||
478 | // ins.first: an iterator, which is a pointer to a pair. | |
479 | // ins.first->first: the key (a pair of name and version). | |
480 | // ins.first->second: the value (Symbol*). | |
481 | // ins.second: true if new entry was inserted, false if not. | |
482 | ||
1564db8d | 483 | Sized_symbol<size>* ret; |
ead1e424 ILT |
484 | bool was_undefined; |
485 | bool was_common; | |
14bfc3f5 ILT |
486 | if (!ins.second) |
487 | { | |
488 | // We already have an entry for NAME/VERSION. | |
593f47df ILT |
489 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (ins.first->second |
490 | SELECT_SIZE(size)); | |
a3ad94ed | 491 | gold_assert(ret != NULL); |
ead1e424 ILT |
492 | |
493 | was_undefined = ret->is_undefined(); | |
494 | was_common = ret->is_common(); | |
495 | ||
70e654ba | 496 | this->resolve(ret, sym, orig_sym, object, version); |
14bfc3f5 ILT |
497 | |
498 | if (def) | |
499 | { | |
500 | if (insdef.second) | |
501 | { | |
502 | // This is the first time we have seen NAME/NULL. Make | |
503 | // NAME/NULL point to NAME/VERSION. | |
504 | insdef.first->second = ret; | |
505 | } | |
99f8faca ILT |
506 | else if (insdef.first->second != ret |
507 | && insdef.first->second->is_undefined()) | |
14bfc3f5 ILT |
508 | { |
509 | // This is the unfortunate case where we already have | |
99f8faca ILT |
510 | // entries for both NAME/VERSION and NAME/NULL. Note |
511 | // that we don't want to combine them if the existing | |
512 | // symbol is going to override the new one. FIXME: We | |
513 | // currently just test is_undefined, but this may not do | |
514 | // the right thing if the existing symbol is from a | |
515 | // shared library and the new one is from a regular | |
516 | // object. | |
517 | ||
274e99f9 | 518 | const Sized_symbol<size>* sym2; |
593f47df | 519 | sym2 = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d ILT |
520 | insdef.first->second |
521 | SELECT_SIZE(size)); | |
593f47df | 522 | Symbol_table::resolve SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
14b31740 | 523 | ret, sym2, version SELECT_SIZE_ENDIAN(size, big_endian)); |
14bfc3f5 ILT |
524 | this->make_forwarder(insdef.first->second, ret); |
525 | insdef.first->second = ret; | |
526 | } | |
527 | } | |
528 | } | |
529 | else | |
530 | { | |
531 | // This is the first time we have seen NAME/VERSION. | |
a3ad94ed | 532 | gold_assert(ins.first->second == NULL); |
ead1e424 ILT |
533 | |
534 | was_undefined = false; | |
535 | was_common = false; | |
536 | ||
14bfc3f5 ILT |
537 | if (def && !insdef.second) |
538 | { | |
14b31740 ILT |
539 | // We already have an entry for NAME/NULL. If we override |
540 | // it, then change it to NAME/VERSION. | |
593f47df ILT |
541 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
542 | insdef.first->second | |
543 | SELECT_SIZE(size)); | |
70e654ba | 544 | this->resolve(ret, sym, orig_sym, object, version); |
14bfc3f5 ILT |
545 | ins.first->second = ret; |
546 | } | |
547 | else | |
548 | { | |
f6ce93d6 ILT |
549 | Sized_target<size, big_endian>* target = |
550 | object->sized_target SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
551 | SELECT_SIZE_ENDIAN_ONLY(size, big_endian)); | |
1564db8d ILT |
552 | if (!target->has_make_symbol()) |
553 | ret = new Sized_symbol<size>(); | |
554 | else | |
14bfc3f5 | 555 | { |
1564db8d ILT |
556 | ret = target->make_symbol(); |
557 | if (ret == NULL) | |
14bfc3f5 ILT |
558 | { |
559 | // This means that we don't want a symbol table | |
560 | // entry after all. | |
561 | if (!def) | |
562 | this->table_.erase(ins.first); | |
563 | else | |
564 | { | |
565 | this->table_.erase(insdef.first); | |
566 | // Inserting insdef invalidated ins. | |
f0641a0b ILT |
567 | this->table_.erase(std::make_pair(name_key, |
568 | version_key)); | |
14bfc3f5 ILT |
569 | } |
570 | return NULL; | |
571 | } | |
572 | } | |
14bfc3f5 | 573 | |
1564db8d ILT |
574 | ret->init(name, version, object, sym); |
575 | ||
14bfc3f5 ILT |
576 | ins.first->second = ret; |
577 | if (def) | |
578 | { | |
579 | // This is the first time we have seen NAME/NULL. Point | |
580 | // it at the new entry for NAME/VERSION. | |
a3ad94ed | 581 | gold_assert(insdef.second); |
14bfc3f5 ILT |
582 | insdef.first->second = ret; |
583 | } | |
584 | } | |
585 | } | |
586 | ||
ead1e424 ILT |
587 | // Record every time we see a new undefined symbol, to speed up |
588 | // archive groups. | |
589 | if (!was_undefined && ret->is_undefined()) | |
590 | ++this->saw_undefined_; | |
591 | ||
592 | // Keep track of common symbols, to speed up common symbol | |
593 | // allocation. | |
594 | if (!was_common && ret->is_common()) | |
595 | this->commons_.push_back(ret); | |
596 | ||
09124467 | 597 | ret->set_is_default(def); |
14bfc3f5 ILT |
598 | return ret; |
599 | } | |
600 | ||
f6ce93d6 | 601 | // Add all the symbols in a relocatable object to the hash table. |
14bfc3f5 ILT |
602 | |
603 | template<int size, bool big_endian> | |
604 | void | |
dbe717ef ILT |
605 | Symbol_table::add_from_relobj( |
606 | Sized_relobj<size, big_endian>* relobj, | |
f6ce93d6 | 607 | const unsigned char* syms, |
14bfc3f5 ILT |
608 | size_t count, |
609 | const char* sym_names, | |
610 | size_t sym_name_size, | |
730cdc88 | 611 | typename Sized_relobj<size, big_endian>::Symbols* sympointers) |
14bfc3f5 | 612 | { |
9025d29d ILT |
613 | gold_assert(size == relobj->target()->get_size()); |
614 | gold_assert(size == parameters->get_size()); | |
14bfc3f5 | 615 | |
a783673b ILT |
616 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
617 | ||
f6ce93d6 | 618 | const unsigned char* p = syms; |
a783673b | 619 | for (size_t i = 0; i < count; ++i, p += sym_size) |
14bfc3f5 ILT |
620 | { |
621 | elfcpp::Sym<size, big_endian> sym(p); | |
a783673b | 622 | elfcpp::Sym<size, big_endian>* psym = &sym; |
14bfc3f5 | 623 | |
a783673b | 624 | unsigned int st_name = psym->get_st_name(); |
14bfc3f5 ILT |
625 | if (st_name >= sym_name_size) |
626 | { | |
75f2446e ILT |
627 | relobj->error(_("bad global symbol name offset %u at %zu"), |
628 | st_name, i); | |
629 | continue; | |
14bfc3f5 ILT |
630 | } |
631 | ||
dbe717ef ILT |
632 | const char* name = sym_names + st_name; |
633 | ||
a783673b ILT |
634 | // A symbol defined in a section which we are not including must |
635 | // be treated as an undefined symbol. | |
636 | unsigned char symbuf[sym_size]; | |
637 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
638 | unsigned int st_shndx = psym->get_st_shndx(); | |
639 | if (st_shndx != elfcpp::SHN_UNDEF | |
640 | && st_shndx < elfcpp::SHN_LORESERVE | |
dbe717ef | 641 | && !relobj->is_section_included(st_shndx)) |
a783673b ILT |
642 | { |
643 | memcpy(symbuf, p, sym_size); | |
644 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
645 | sw.put_st_shndx(elfcpp::SHN_UNDEF); | |
646 | psym = &sym2; | |
647 | } | |
648 | ||
14bfc3f5 ILT |
649 | // In an object file, an '@' in the name separates the symbol |
650 | // name from the version name. If there are two '@' characters, | |
651 | // this is the default version. | |
652 | const char* ver = strchr(name, '@'); | |
09124467 | 653 | int namelen = 0; |
55a93433 | 654 | // DEF: is the version default? LOCAL: is the symbol forced local? |
09124467 | 655 | bool def = false; |
55a93433 | 656 | bool local = false; |
09124467 ILT |
657 | |
658 | if (ver != NULL) | |
659 | { | |
660 | // The symbol name is of the form foo@VERSION or foo@@VERSION | |
661 | namelen = ver - name; | |
662 | ++ver; | |
663 | if (*ver == '@') | |
664 | { | |
665 | def = true; | |
666 | ++ver; | |
667 | } | |
668 | } | |
669 | else if (!version_script_.empty()) | |
670 | { | |
671 | // The symbol name did not have a version, but | |
672 | // the version script may assign a version anyway. | |
673 | namelen = strlen(name); | |
674 | def = true; | |
55a93433 | 675 | // Check the global: entries from the version script. |
09124467 ILT |
676 | const std::string& version = |
677 | version_script_.get_symbol_version(name); | |
678 | if (!version.empty()) | |
679 | ver = version.c_str(); | |
55a93433 ILT |
680 | // Check the local: entries from the version script |
681 | if (version_script_.symbol_is_local(name)) | |
682 | local = true; | |
09124467 | 683 | } |
14bfc3f5 | 684 | |
aeddab66 | 685 | Sized_symbol<size>* res; |
14bfc3f5 ILT |
686 | if (ver == NULL) |
687 | { | |
f0641a0b | 688 | Stringpool::Key name_key; |
cfd73a4e | 689 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef | 690 | res = this->add_from_object(relobj, name, name_key, NULL, 0, |
70e654ba | 691 | false, *psym, sym); |
55a93433 ILT |
692 | if (local) |
693 | this->force_local(res); | |
14bfc3f5 ILT |
694 | } |
695 | else | |
696 | { | |
f0641a0b | 697 | Stringpool::Key name_key; |
09124467 | 698 | name = this->namepool_.add_with_length(name, namelen, true, |
c0873094 | 699 | &name_key); |
f0641a0b | 700 | Stringpool::Key ver_key; |
cfd73a4e | 701 | ver = this->namepool_.add(ver, true, &ver_key); |
f0641a0b | 702 | |
dbe717ef | 703 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
70e654ba | 704 | def, *psym, sym); |
14bfc3f5 ILT |
705 | } |
706 | ||
730cdc88 | 707 | (*sympointers)[i] = res; |
14bfc3f5 ILT |
708 | } |
709 | } | |
710 | ||
dbe717ef ILT |
711 | // Add all the symbols in a dynamic object to the hash table. |
712 | ||
713 | template<int size, bool big_endian> | |
714 | void | |
715 | Symbol_table::add_from_dynobj( | |
716 | Sized_dynobj<size, big_endian>* dynobj, | |
717 | const unsigned char* syms, | |
718 | size_t count, | |
719 | const char* sym_names, | |
720 | size_t sym_name_size, | |
721 | const unsigned char* versym, | |
722 | size_t versym_size, | |
723 | const std::vector<const char*>* version_map) | |
724 | { | |
9025d29d ILT |
725 | gold_assert(size == dynobj->target()->get_size()); |
726 | gold_assert(size == parameters->get_size()); | |
dbe717ef ILT |
727 | |
728 | if (versym != NULL && versym_size / 2 < count) | |
729 | { | |
75f2446e ILT |
730 | dynobj->error(_("too few symbol versions")); |
731 | return; | |
dbe717ef ILT |
732 | } |
733 | ||
734 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
735 | ||
aeddab66 ILT |
736 | // We keep a list of all STT_OBJECT symbols, so that we can resolve |
737 | // weak aliases. This is necessary because if the dynamic object | |
738 | // provides the same variable under two names, one of which is a | |
739 | // weak definition, and the regular object refers to the weak | |
740 | // definition, we have to put both the weak definition and the | |
741 | // strong definition into the dynamic symbol table. Given a weak | |
742 | // definition, the only way that we can find the corresponding | |
743 | // strong definition, if any, is to search the symbol table. | |
744 | std::vector<Sized_symbol<size>*> object_symbols; | |
745 | ||
dbe717ef ILT |
746 | const unsigned char* p = syms; |
747 | const unsigned char* vs = versym; | |
748 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) | |
749 | { | |
750 | elfcpp::Sym<size, big_endian> sym(p); | |
751 | ||
752 | // Ignore symbols with local binding. | |
753 | if (sym.get_st_bind() == elfcpp::STB_LOCAL) | |
754 | continue; | |
755 | ||
756 | unsigned int st_name = sym.get_st_name(); | |
757 | if (st_name >= sym_name_size) | |
758 | { | |
75f2446e ILT |
759 | dynobj->error(_("bad symbol name offset %u at %zu"), |
760 | st_name, i); | |
761 | continue; | |
dbe717ef ILT |
762 | } |
763 | ||
764 | const char* name = sym_names + st_name; | |
765 | ||
aeddab66 ILT |
766 | Sized_symbol<size>* res; |
767 | ||
dbe717ef ILT |
768 | if (versym == NULL) |
769 | { | |
770 | Stringpool::Key name_key; | |
cfd73a4e | 771 | name = this->namepool_.add(name, true, &name_key); |
aeddab66 | 772 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
70e654ba | 773 | false, sym, sym); |
dbe717ef | 774 | } |
aeddab66 ILT |
775 | else |
776 | { | |
777 | // Read the version information. | |
dbe717ef | 778 | |
aeddab66 | 779 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); |
dbe717ef | 780 | |
aeddab66 ILT |
781 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; |
782 | v &= elfcpp::VERSYM_VERSION; | |
dbe717ef | 783 | |
aeddab66 ILT |
784 | // The Sun documentation says that V can be VER_NDX_LOCAL, |
785 | // or VER_NDX_GLOBAL, or a version index. The meaning of | |
786 | // VER_NDX_LOCAL is defined as "Symbol has local scope." | |
787 | // The old GNU linker will happily generate VER_NDX_LOCAL | |
788 | // for an undefined symbol. I don't know what the Sun | |
789 | // linker will generate. | |
dbe717ef | 790 | |
aeddab66 ILT |
791 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
792 | && sym.get_st_shndx() != elfcpp::SHN_UNDEF) | |
793 | { | |
794 | // This symbol should not be visible outside the object. | |
795 | continue; | |
796 | } | |
64707334 | 797 | |
aeddab66 ILT |
798 | // At this point we are definitely going to add this symbol. |
799 | Stringpool::Key name_key; | |
800 | name = this->namepool_.add(name, true, &name_key); | |
dbe717ef | 801 | |
aeddab66 ILT |
802 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
803 | || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) | |
804 | { | |
805 | // This symbol does not have a version. | |
806 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, | |
70e654ba | 807 | false, sym, sym); |
aeddab66 ILT |
808 | } |
809 | else | |
810 | { | |
811 | if (v >= version_map->size()) | |
812 | { | |
813 | dynobj->error(_("versym for symbol %zu out of range: %u"), | |
814 | i, v); | |
815 | continue; | |
816 | } | |
dbe717ef | 817 | |
aeddab66 ILT |
818 | const char* version = (*version_map)[v]; |
819 | if (version == NULL) | |
820 | { | |
821 | dynobj->error(_("versym for symbol %zu has no name: %u"), | |
822 | i, v); | |
823 | continue; | |
824 | } | |
dbe717ef | 825 | |
aeddab66 ILT |
826 | Stringpool::Key version_key; |
827 | version = this->namepool_.add(version, true, &version_key); | |
828 | ||
829 | // If this is an absolute symbol, and the version name | |
830 | // and symbol name are the same, then this is the | |
831 | // version definition symbol. These symbols exist to | |
832 | // support using -u to pull in particular versions. We | |
833 | // do not want to record a version for them. | |
834 | if (sym.get_st_shndx() == elfcpp::SHN_ABS | |
835 | && name_key == version_key) | |
836 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, | |
70e654ba | 837 | false, sym, sym); |
aeddab66 ILT |
838 | else |
839 | { | |
840 | const bool def = (!hidden | |
841 | && (sym.get_st_shndx() | |
842 | != elfcpp::SHN_UNDEF)); | |
843 | res = this->add_from_object(dynobj, name, name_key, version, | |
70e654ba | 844 | version_key, def, sym, sym); |
aeddab66 ILT |
845 | } |
846 | } | |
dbe717ef ILT |
847 | } |
848 | ||
aeddab66 ILT |
849 | if (sym.get_st_shndx() != elfcpp::SHN_UNDEF |
850 | && sym.get_st_type() == elfcpp::STT_OBJECT) | |
851 | object_symbols.push_back(res); | |
852 | } | |
853 | ||
854 | this->record_weak_aliases(&object_symbols); | |
855 | } | |
856 | ||
857 | // This is used to sort weak aliases. We sort them first by section | |
858 | // index, then by offset, then by weak ahead of strong. | |
859 | ||
860 | template<int size> | |
861 | class Weak_alias_sorter | |
862 | { | |
863 | public: | |
864 | bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const; | |
865 | }; | |
866 | ||
867 | template<int size> | |
868 | bool | |
869 | Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1, | |
870 | const Sized_symbol<size>* s2) const | |
871 | { | |
872 | if (s1->shndx() != s2->shndx()) | |
873 | return s1->shndx() < s2->shndx(); | |
874 | if (s1->value() != s2->value()) | |
875 | return s1->value() < s2->value(); | |
876 | if (s1->binding() != s2->binding()) | |
877 | { | |
878 | if (s1->binding() == elfcpp::STB_WEAK) | |
879 | return true; | |
880 | if (s2->binding() == elfcpp::STB_WEAK) | |
881 | return false; | |
882 | } | |
883 | return std::string(s1->name()) < std::string(s2->name()); | |
884 | } | |
dbe717ef | 885 | |
aeddab66 ILT |
886 | // SYMBOLS is a list of object symbols from a dynamic object. Look |
887 | // for any weak aliases, and record them so that if we add the weak | |
888 | // alias to the dynamic symbol table, we also add the corresponding | |
889 | // strong symbol. | |
dbe717ef | 890 | |
aeddab66 ILT |
891 | template<int size> |
892 | void | |
893 | Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols) | |
894 | { | |
895 | // Sort the vector by section index, then by offset, then by weak | |
896 | // ahead of strong. | |
897 | std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>()); | |
898 | ||
899 | // Walk through the vector. For each weak definition, record | |
900 | // aliases. | |
901 | for (typename std::vector<Sized_symbol<size>*>::const_iterator p = | |
902 | symbols->begin(); | |
903 | p != symbols->end(); | |
904 | ++p) | |
905 | { | |
906 | if ((*p)->binding() != elfcpp::STB_WEAK) | |
907 | continue; | |
908 | ||
909 | // Build a circular list of weak aliases. Each symbol points to | |
910 | // the next one in the circular list. | |
911 | ||
912 | Sized_symbol<size>* from_sym = *p; | |
913 | typename std::vector<Sized_symbol<size>*>::const_iterator q; | |
914 | for (q = p + 1; q != symbols->end(); ++q) | |
dbe717ef | 915 | { |
aeddab66 ILT |
916 | if ((*q)->shndx() != from_sym->shndx() |
917 | || (*q)->value() != from_sym->value()) | |
918 | break; | |
919 | ||
920 | this->weak_aliases_[from_sym] = *q; | |
921 | from_sym->set_has_alias(); | |
922 | from_sym = *q; | |
dbe717ef ILT |
923 | } |
924 | ||
aeddab66 ILT |
925 | if (from_sym != *p) |
926 | { | |
927 | this->weak_aliases_[from_sym] = *p; | |
928 | from_sym->set_has_alias(); | |
929 | } | |
dbe717ef | 930 | |
aeddab66 | 931 | p = q - 1; |
dbe717ef ILT |
932 | } |
933 | } | |
934 | ||
ead1e424 ILT |
935 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
936 | // true, then only create the symbol if there is a reference to it. | |
86f2e683 | 937 | // If this does not return NULL, it sets *POLDSYM to the existing |
306d9ef0 | 938 | // symbol if there is one. This canonicalizes *PNAME and *PVERSION. |
ead1e424 ILT |
939 | |
940 | template<int size, bool big_endian> | |
941 | Sized_symbol<size>* | |
9b07f471 ILT |
942 | Symbol_table::define_special_symbol(const char** pname, const char** pversion, |
943 | bool only_if_ref, | |
86f2e683 | 944 | Sized_symbol<size>** poldsym |
593f47df | 945 | ACCEPT_SIZE_ENDIAN) |
ead1e424 | 946 | { |
ead1e424 ILT |
947 | Symbol* oldsym; |
948 | Sized_symbol<size>* sym; | |
86f2e683 ILT |
949 | bool add_to_table = false; |
950 | typename Symbol_table_type::iterator add_loc = this->table_.end(); | |
ead1e424 | 951 | |
55a93433 ILT |
952 | // If the caller didn't give us a version, see if we get one from |
953 | // the version script. | |
954 | if (*pversion == NULL) | |
955 | { | |
956 | const std::string& v(this->version_script_.get_symbol_version(*pname)); | |
957 | if (!v.empty()) | |
958 | *pversion = v.c_str(); | |
959 | } | |
960 | ||
ead1e424 ILT |
961 | if (only_if_ref) |
962 | { | |
306d9ef0 | 963 | oldsym = this->lookup(*pname, *pversion); |
f6ce93d6 | 964 | if (oldsym == NULL || !oldsym->is_undefined()) |
ead1e424 | 965 | return NULL; |
306d9ef0 ILT |
966 | |
967 | *pname = oldsym->name(); | |
968 | *pversion = oldsym->version(); | |
ead1e424 ILT |
969 | } |
970 | else | |
971 | { | |
14b31740 | 972 | // Canonicalize NAME and VERSION. |
f0641a0b | 973 | Stringpool::Key name_key; |
cfd73a4e | 974 | *pname = this->namepool_.add(*pname, true, &name_key); |
ead1e424 | 975 | |
14b31740 | 976 | Stringpool::Key version_key = 0; |
306d9ef0 | 977 | if (*pversion != NULL) |
cfd73a4e | 978 | *pversion = this->namepool_.add(*pversion, true, &version_key); |
14b31740 | 979 | |
ead1e424 | 980 | Symbol* const snull = NULL; |
ead1e424 | 981 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
14b31740 ILT |
982 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
983 | version_key), | |
ead1e424 ILT |
984 | snull)); |
985 | ||
986 | if (!ins.second) | |
987 | { | |
14b31740 | 988 | // We already have a symbol table entry for NAME/VERSION. |
ead1e424 | 989 | oldsym = ins.first->second; |
a3ad94ed | 990 | gold_assert(oldsym != NULL); |
ead1e424 ILT |
991 | } |
992 | else | |
993 | { | |
994 | // We haven't seen this symbol before. | |
a3ad94ed | 995 | gold_assert(ins.first->second == NULL); |
86f2e683 ILT |
996 | add_to_table = true; |
997 | add_loc = ins.first; | |
ead1e424 ILT |
998 | oldsym = NULL; |
999 | } | |
1000 | } | |
1001 | ||
9b07f471 | 1002 | const Target* target = parameters->target(); |
86f2e683 ILT |
1003 | if (!target->has_make_symbol()) |
1004 | sym = new Sized_symbol<size>(); | |
1005 | else | |
ead1e424 | 1006 | { |
86f2e683 ILT |
1007 | gold_assert(target->get_size() == size); |
1008 | gold_assert(target->is_big_endian() ? big_endian : !big_endian); | |
1009 | typedef Sized_target<size, big_endian> My_target; | |
1010 | const My_target* sized_target = | |
1011 | static_cast<const My_target*>(target); | |
1012 | sym = sized_target->make_symbol(); | |
1013 | if (sym == NULL) | |
1014 | return NULL; | |
1015 | } | |
ead1e424 | 1016 | |
86f2e683 ILT |
1017 | if (add_to_table) |
1018 | add_loc->second = sym; | |
1019 | else | |
1020 | gold_assert(oldsym != NULL); | |
ead1e424 | 1021 | |
86f2e683 ILT |
1022 | *poldsym = this->get_sized_symbol SELECT_SIZE_NAME(size) (oldsym |
1023 | SELECT_SIZE(size)); | |
ead1e424 ILT |
1024 | |
1025 | return sym; | |
1026 | } | |
1027 | ||
1028 | // Define a symbol based on an Output_data. | |
1029 | ||
14b31740 | 1030 | Symbol* |
9b07f471 ILT |
1031 | Symbol_table::define_in_output_data(const char* name, |
1032 | const char* version, | |
1033 | Output_data* od, | |
1034 | uint64_t value, | |
1035 | uint64_t symsize, | |
1036 | elfcpp::STT type, | |
1037 | elfcpp::STB binding, | |
ead1e424 ILT |
1038 | elfcpp::STV visibility, |
1039 | unsigned char nonvis, | |
1040 | bool offset_is_from_end, | |
1041 | bool only_if_ref) | |
1042 | { | |
9025d29d | 1043 | if (parameters->get_size() == 32) |
86f2e683 ILT |
1044 | { |
1045 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
9b07f471 | 1046 | return this->do_define_in_output_data<32>(name, version, od, |
86f2e683 ILT |
1047 | value, symsize, type, binding, |
1048 | visibility, nonvis, | |
1049 | offset_is_from_end, | |
1050 | only_if_ref); | |
1051 | #else | |
1052 | gold_unreachable(); | |
1053 | #endif | |
1054 | } | |
9025d29d | 1055 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
1056 | { |
1057 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
9b07f471 | 1058 | return this->do_define_in_output_data<64>(name, version, od, |
86f2e683 ILT |
1059 | value, symsize, type, binding, |
1060 | visibility, nonvis, | |
1061 | offset_is_from_end, | |
1062 | only_if_ref); | |
1063 | #else | |
1064 | gold_unreachable(); | |
1065 | #endif | |
1066 | } | |
ead1e424 | 1067 | else |
a3ad94ed | 1068 | gold_unreachable(); |
ead1e424 ILT |
1069 | } |
1070 | ||
1071 | // Define a symbol in an Output_data, sized version. | |
1072 | ||
1073 | template<int size> | |
14b31740 | 1074 | Sized_symbol<size>* |
ead1e424 | 1075 | Symbol_table::do_define_in_output_data( |
ead1e424 | 1076 | const char* name, |
14b31740 | 1077 | const char* version, |
ead1e424 ILT |
1078 | Output_data* od, |
1079 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
1080 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
1081 | elfcpp::STT type, | |
1082 | elfcpp::STB binding, | |
1083 | elfcpp::STV visibility, | |
1084 | unsigned char nonvis, | |
1085 | bool offset_is_from_end, | |
1086 | bool only_if_ref) | |
1087 | { | |
1088 | Sized_symbol<size>* sym; | |
86f2e683 | 1089 | Sized_symbol<size>* oldsym; |
ead1e424 | 1090 | |
9025d29d | 1091 | if (parameters->is_big_endian()) |
193a53d9 ILT |
1092 | { |
1093 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
1094 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
9b07f471 | 1095 | &name, &version, only_if_ref, &oldsym |
193a53d9 ILT |
1096 | SELECT_SIZE_ENDIAN(size, true)); |
1097 | #else | |
1098 | gold_unreachable(); | |
1099 | #endif | |
1100 | } | |
ead1e424 | 1101 | else |
193a53d9 ILT |
1102 | { |
1103 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
1104 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
9b07f471 | 1105 | &name, &version, only_if_ref, &oldsym |
193a53d9 ILT |
1106 | SELECT_SIZE_ENDIAN(size, false)); |
1107 | #else | |
1108 | gold_unreachable(); | |
1109 | #endif | |
1110 | } | |
ead1e424 ILT |
1111 | |
1112 | if (sym == NULL) | |
14b31740 | 1113 | return NULL; |
ead1e424 | 1114 | |
d4f5281b | 1115 | gold_assert(version == NULL || oldsym != NULL); |
ead1e424 ILT |
1116 | sym->init(name, od, value, symsize, type, binding, visibility, nonvis, |
1117 | offset_is_from_end); | |
14b31740 | 1118 | |
e5756efb | 1119 | if (oldsym == NULL) |
55a93433 ILT |
1120 | { |
1121 | if (binding == elfcpp::STB_LOCAL | |
1122 | || this->version_script_.symbol_is_local(name)) | |
1123 | this->force_local(sym); | |
1124 | return sym; | |
1125 | } | |
86f2e683 | 1126 | |
e5756efb ILT |
1127 | if (Symbol_table::should_override_with_special(oldsym)) |
1128 | this->override_with_special(oldsym, sym); | |
1129 | delete sym; | |
1130 | return oldsym; | |
ead1e424 ILT |
1131 | } |
1132 | ||
1133 | // Define a symbol based on an Output_segment. | |
1134 | ||
14b31740 | 1135 | Symbol* |
9b07f471 | 1136 | Symbol_table::define_in_output_segment(const char* name, |
14b31740 | 1137 | const char* version, Output_segment* os, |
9b07f471 ILT |
1138 | uint64_t value, |
1139 | uint64_t symsize, | |
1140 | elfcpp::STT type, | |
1141 | elfcpp::STB binding, | |
ead1e424 ILT |
1142 | elfcpp::STV visibility, |
1143 | unsigned char nonvis, | |
1144 | Symbol::Segment_offset_base offset_base, | |
1145 | bool only_if_ref) | |
1146 | { | |
9025d29d | 1147 | if (parameters->get_size() == 32) |
86f2e683 ILT |
1148 | { |
1149 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
9b07f471 | 1150 | return this->do_define_in_output_segment<32>(name, version, os, |
86f2e683 ILT |
1151 | value, symsize, type, |
1152 | binding, visibility, nonvis, | |
1153 | offset_base, only_if_ref); | |
1154 | #else | |
1155 | gold_unreachable(); | |
1156 | #endif | |
1157 | } | |
9025d29d | 1158 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
1159 | { |
1160 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
9b07f471 | 1161 | return this->do_define_in_output_segment<64>(name, version, os, |
86f2e683 ILT |
1162 | value, symsize, type, |
1163 | binding, visibility, nonvis, | |
1164 | offset_base, only_if_ref); | |
1165 | #else | |
1166 | gold_unreachable(); | |
1167 | #endif | |
1168 | } | |
ead1e424 | 1169 | else |
a3ad94ed | 1170 | gold_unreachable(); |
ead1e424 ILT |
1171 | } |
1172 | ||
1173 | // Define a symbol in an Output_segment, sized version. | |
1174 | ||
1175 | template<int size> | |
14b31740 | 1176 | Sized_symbol<size>* |
ead1e424 | 1177 | Symbol_table::do_define_in_output_segment( |
ead1e424 | 1178 | const char* name, |
14b31740 | 1179 | const char* version, |
ead1e424 ILT |
1180 | Output_segment* os, |
1181 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
1182 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
1183 | elfcpp::STT type, | |
1184 | elfcpp::STB binding, | |
1185 | elfcpp::STV visibility, | |
1186 | unsigned char nonvis, | |
1187 | Symbol::Segment_offset_base offset_base, | |
1188 | bool only_if_ref) | |
1189 | { | |
1190 | Sized_symbol<size>* sym; | |
86f2e683 | 1191 | Sized_symbol<size>* oldsym; |
ead1e424 | 1192 | |
9025d29d ILT |
1193 | if (parameters->is_big_endian()) |
1194 | { | |
1195 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
1196 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
9b07f471 | 1197 | &name, &version, only_if_ref, &oldsym |
9025d29d ILT |
1198 | SELECT_SIZE_ENDIAN(size, true)); |
1199 | #else | |
1200 | gold_unreachable(); | |
1201 | #endif | |
1202 | } | |
ead1e424 | 1203 | else |
9025d29d ILT |
1204 | { |
1205 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
1206 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
9b07f471 | 1207 | &name, &version, only_if_ref, &oldsym |
9025d29d ILT |
1208 | SELECT_SIZE_ENDIAN(size, false)); |
1209 | #else | |
1210 | gold_unreachable(); | |
1211 | #endif | |
1212 | } | |
ead1e424 ILT |
1213 | |
1214 | if (sym == NULL) | |
14b31740 | 1215 | return NULL; |
ead1e424 | 1216 | |
d4f5281b | 1217 | gold_assert(version == NULL || oldsym != NULL); |
ead1e424 ILT |
1218 | sym->init(name, os, value, symsize, type, binding, visibility, nonvis, |
1219 | offset_base); | |
14b31740 | 1220 | |
e5756efb | 1221 | if (oldsym == NULL) |
55a93433 ILT |
1222 | { |
1223 | if (binding == elfcpp::STB_LOCAL | |
1224 | || this->version_script_.symbol_is_local(name)) | |
1225 | this->force_local(sym); | |
1226 | return sym; | |
1227 | } | |
86f2e683 | 1228 | |
e5756efb ILT |
1229 | if (Symbol_table::should_override_with_special(oldsym)) |
1230 | this->override_with_special(oldsym, sym); | |
1231 | delete sym; | |
1232 | return oldsym; | |
ead1e424 ILT |
1233 | } |
1234 | ||
1235 | // Define a special symbol with a constant value. It is a multiple | |
1236 | // definition error if this symbol is already defined. | |
1237 | ||
14b31740 | 1238 | Symbol* |
9b07f471 ILT |
1239 | Symbol_table::define_as_constant(const char* name, |
1240 | const char* version, | |
1241 | uint64_t value, | |
1242 | uint64_t symsize, | |
1243 | elfcpp::STT type, | |
1244 | elfcpp::STB binding, | |
1245 | elfcpp::STV visibility, | |
1246 | unsigned char nonvis, | |
1247 | bool only_if_ref) | |
ead1e424 | 1248 | { |
9025d29d | 1249 | if (parameters->get_size() == 32) |
86f2e683 ILT |
1250 | { |
1251 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
9b07f471 | 1252 | return this->do_define_as_constant<32>(name, version, value, |
86f2e683 ILT |
1253 | symsize, type, binding, |
1254 | visibility, nonvis, only_if_ref); | |
1255 | #else | |
1256 | gold_unreachable(); | |
1257 | #endif | |
1258 | } | |
9025d29d | 1259 | else if (parameters->get_size() == 64) |
86f2e683 ILT |
1260 | { |
1261 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
9b07f471 | 1262 | return this->do_define_as_constant<64>(name, version, value, |
86f2e683 ILT |
1263 | symsize, type, binding, |
1264 | visibility, nonvis, only_if_ref); | |
1265 | #else | |
1266 | gold_unreachable(); | |
1267 | #endif | |
1268 | } | |
ead1e424 | 1269 | else |
a3ad94ed | 1270 | gold_unreachable(); |
ead1e424 ILT |
1271 | } |
1272 | ||
1273 | // Define a symbol as a constant, sized version. | |
1274 | ||
1275 | template<int size> | |
14b31740 | 1276 | Sized_symbol<size>* |
ead1e424 | 1277 | Symbol_table::do_define_as_constant( |
ead1e424 | 1278 | const char* name, |
14b31740 | 1279 | const char* version, |
ead1e424 ILT |
1280 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
1281 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
1282 | elfcpp::STT type, | |
1283 | elfcpp::STB binding, | |
1284 | elfcpp::STV visibility, | |
1285 | unsigned char nonvis, | |
1286 | bool only_if_ref) | |
1287 | { | |
1288 | Sized_symbol<size>* sym; | |
86f2e683 | 1289 | Sized_symbol<size>* oldsym; |
ead1e424 | 1290 | |
9025d29d ILT |
1291 | if (parameters->is_big_endian()) |
1292 | { | |
1293 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
1294 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( | |
9b07f471 | 1295 | &name, &version, only_if_ref, &oldsym |
9025d29d ILT |
1296 | SELECT_SIZE_ENDIAN(size, true)); |
1297 | #else | |
1298 | gold_unreachable(); | |
1299 | #endif | |
1300 | } | |
ead1e424 | 1301 | else |
9025d29d ILT |
1302 | { |
1303 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
1304 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( | |
9b07f471 | 1305 | &name, &version, only_if_ref, &oldsym |
9025d29d ILT |
1306 | SELECT_SIZE_ENDIAN(size, false)); |
1307 | #else | |
1308 | gold_unreachable(); | |
1309 | #endif | |
1310 | } | |
ead1e424 ILT |
1311 | |
1312 | if (sym == NULL) | |
14b31740 | 1313 | return NULL; |
ead1e424 | 1314 | |
09124467 | 1315 | gold_assert(version == NULL || version == name || oldsym != NULL); |
ead1e424 | 1316 | sym->init(name, value, symsize, type, binding, visibility, nonvis); |
14b31740 | 1317 | |
e5756efb | 1318 | if (oldsym == NULL) |
55a93433 ILT |
1319 | { |
1320 | if (binding == elfcpp::STB_LOCAL | |
1321 | || this->version_script_.symbol_is_local(name)) | |
1322 | this->force_local(sym); | |
1323 | return sym; | |
1324 | } | |
86f2e683 | 1325 | |
e5756efb ILT |
1326 | if (Symbol_table::should_override_with_special(oldsym)) |
1327 | this->override_with_special(oldsym, sym); | |
1328 | delete sym; | |
1329 | return oldsym; | |
ead1e424 ILT |
1330 | } |
1331 | ||
1332 | // Define a set of symbols in output sections. | |
1333 | ||
1334 | void | |
9b07f471 ILT |
1335 | Symbol_table::define_symbols(const Layout* layout, int count, |
1336 | const Define_symbol_in_section* p) | |
ead1e424 ILT |
1337 | { |
1338 | for (int i = 0; i < count; ++i, ++p) | |
1339 | { | |
1340 | Output_section* os = layout->find_output_section(p->output_section); | |
1341 | if (os != NULL) | |
9b07f471 | 1342 | this->define_in_output_data(p->name, NULL, os, p->value, |
14b31740 ILT |
1343 | p->size, p->type, p->binding, |
1344 | p->visibility, p->nonvis, | |
1345 | p->offset_is_from_end, p->only_if_ref); | |
ead1e424 | 1346 | else |
9b07f471 | 1347 | this->define_as_constant(p->name, NULL, 0, p->size, p->type, |
ead1e424 ILT |
1348 | p->binding, p->visibility, p->nonvis, |
1349 | p->only_if_ref); | |
1350 | } | |
1351 | } | |
1352 | ||
1353 | // Define a set of symbols in output segments. | |
1354 | ||
1355 | void | |
9b07f471 ILT |
1356 | Symbol_table::define_symbols(const Layout* layout, int count, |
1357 | const Define_symbol_in_segment* p) | |
ead1e424 ILT |
1358 | { |
1359 | for (int i = 0; i < count; ++i, ++p) | |
1360 | { | |
1361 | Output_segment* os = layout->find_output_segment(p->segment_type, | |
1362 | p->segment_flags_set, | |
1363 | p->segment_flags_clear); | |
1364 | if (os != NULL) | |
9b07f471 | 1365 | this->define_in_output_segment(p->name, NULL, os, p->value, |
14b31740 ILT |
1366 | p->size, p->type, p->binding, |
1367 | p->visibility, p->nonvis, | |
1368 | p->offset_base, p->only_if_ref); | |
ead1e424 | 1369 | else |
9b07f471 | 1370 | this->define_as_constant(p->name, NULL, 0, p->size, p->type, |
ead1e424 ILT |
1371 | p->binding, p->visibility, p->nonvis, |
1372 | p->only_if_ref); | |
1373 | } | |
1374 | } | |
1375 | ||
46fe1623 ILT |
1376 | // Define CSYM using a COPY reloc. POSD is the Output_data where the |
1377 | // symbol should be defined--typically a .dyn.bss section. VALUE is | |
1378 | // the offset within POSD. | |
1379 | ||
1380 | template<int size> | |
1381 | void | |
fe8718a4 | 1382 | Symbol_table::define_with_copy_reloc( |
fe8718a4 ILT |
1383 | Sized_symbol<size>* csym, |
1384 | Output_data* posd, | |
1385 | typename elfcpp::Elf_types<size>::Elf_Addr value) | |
46fe1623 ILT |
1386 | { |
1387 | gold_assert(csym->is_from_dynobj()); | |
1388 | gold_assert(!csym->is_copied_from_dynobj()); | |
1389 | Object* object = csym->object(); | |
1390 | gold_assert(object->is_dynamic()); | |
1391 | Dynobj* dynobj = static_cast<Dynobj*>(object); | |
1392 | ||
1393 | // Our copied variable has to override any variable in a shared | |
1394 | // library. | |
1395 | elfcpp::STB binding = csym->binding(); | |
1396 | if (binding == elfcpp::STB_WEAK) | |
1397 | binding = elfcpp::STB_GLOBAL; | |
1398 | ||
9b07f471 | 1399 | this->define_in_output_data(csym->name(), csym->version(), |
46fe1623 ILT |
1400 | posd, value, csym->symsize(), |
1401 | csym->type(), binding, | |
1402 | csym->visibility(), csym->nonvis(), | |
1403 | false, false); | |
1404 | ||
1405 | csym->set_is_copied_from_dynobj(); | |
1406 | csym->set_needs_dynsym_entry(); | |
1407 | ||
1408 | this->copied_symbol_dynobjs_[csym] = dynobj; | |
1409 | ||
1410 | // We have now defined all aliases, but we have not entered them all | |
1411 | // in the copied_symbol_dynobjs_ map. | |
1412 | if (csym->has_alias()) | |
1413 | { | |
1414 | Symbol* sym = csym; | |
1415 | while (true) | |
1416 | { | |
1417 | sym = this->weak_aliases_[sym]; | |
1418 | if (sym == csym) | |
1419 | break; | |
1420 | gold_assert(sym->output_data() == posd); | |
1421 | ||
1422 | sym->set_is_copied_from_dynobj(); | |
1423 | this->copied_symbol_dynobjs_[sym] = dynobj; | |
1424 | } | |
1425 | } | |
1426 | } | |
1427 | ||
1428 | // SYM is defined using a COPY reloc. Return the dynamic object where | |
1429 | // the original definition was found. | |
1430 | ||
1431 | Dynobj* | |
1432 | Symbol_table::get_copy_source(const Symbol* sym) const | |
1433 | { | |
1434 | gold_assert(sym->is_copied_from_dynobj()); | |
1435 | Copied_symbol_dynobjs::const_iterator p = | |
1436 | this->copied_symbol_dynobjs_.find(sym); | |
1437 | gold_assert(p != this->copied_symbol_dynobjs_.end()); | |
1438 | return p->second; | |
1439 | } | |
1440 | ||
a3ad94ed ILT |
1441 | // Set the dynamic symbol indexes. INDEX is the index of the first |
1442 | // global dynamic symbol. Pointers to the symbols are stored into the | |
1443 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
1444 | // updated dynamic symbol index. | |
1445 | ||
1446 | unsigned int | |
9b07f471 | 1447 | Symbol_table::set_dynsym_indexes(unsigned int index, |
a3ad94ed | 1448 | std::vector<Symbol*>* syms, |
14b31740 ILT |
1449 | Stringpool* dynpool, |
1450 | Versions* versions) | |
a3ad94ed ILT |
1451 | { |
1452 | for (Symbol_table_type::iterator p = this->table_.begin(); | |
1453 | p != this->table_.end(); | |
1454 | ++p) | |
1455 | { | |
1456 | Symbol* sym = p->second; | |
16649710 ILT |
1457 | |
1458 | // Note that SYM may already have a dynamic symbol index, since | |
1459 | // some symbols appear more than once in the symbol table, with | |
1460 | // and without a version. | |
1461 | ||
436ca963 | 1462 | if (!sym->should_add_dynsym_entry()) |
16649710 ILT |
1463 | sym->set_dynsym_index(-1U); |
1464 | else if (!sym->has_dynsym_index()) | |
a3ad94ed ILT |
1465 | { |
1466 | sym->set_dynsym_index(index); | |
1467 | ++index; | |
1468 | syms->push_back(sym); | |
cfd73a4e | 1469 | dynpool->add(sym->name(), false, NULL); |
14b31740 ILT |
1470 | |
1471 | // Record any version information. | |
09124467 ILT |
1472 | if (sym->version() != NULL) |
1473 | versions->record_version(this, dynpool, sym); | |
a3ad94ed ILT |
1474 | } |
1475 | } | |
1476 | ||
14b31740 ILT |
1477 | // Finish up the versions. In some cases this may add new dynamic |
1478 | // symbols. | |
9b07f471 | 1479 | index = versions->finalize(this, index, syms); |
14b31740 | 1480 | |
a3ad94ed ILT |
1481 | return index; |
1482 | } | |
1483 | ||
c06b7b0b | 1484 | // Set the final values for all the symbols. The index of the first |
55a93433 ILT |
1485 | // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the |
1486 | // file offset OFF. Add their names to POOL. Return the new file | |
1487 | // offset. Update *PLOCAL_SYMCOUNT if necessary. | |
54dc6425 | 1488 | |
75f65a3e | 1489 | off_t |
55a93433 ILT |
1490 | Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index, |
1491 | size_t dyncount, Stringpool* pool, | |
1492 | unsigned int *plocal_symcount) | |
54dc6425 | 1493 | { |
f6ce93d6 ILT |
1494 | off_t ret; |
1495 | ||
55a93433 ILT |
1496 | gold_assert(*plocal_symcount != 0); |
1497 | this->first_global_index_ = *plocal_symcount; | |
c06b7b0b | 1498 | |
16649710 ILT |
1499 | this->dynamic_offset_ = dynoff; |
1500 | this->first_dynamic_global_index_ = dyn_global_index; | |
1501 | this->dynamic_count_ = dyncount; | |
1502 | ||
9025d29d ILT |
1503 | if (parameters->get_size() == 32) |
1504 | { | |
1505 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE) | |
55a93433 | 1506 | ret = this->sized_finalize<32>(off, pool, plocal_symcount); |
9025d29d ILT |
1507 | #else |
1508 | gold_unreachable(); | |
1509 | #endif | |
1510 | } | |
1511 | else if (parameters->get_size() == 64) | |
1512 | { | |
1513 | #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE) | |
55a93433 | 1514 | ret = this->sized_finalize<64>(off, pool, plocal_symcount); |
9025d29d ILT |
1515 | #else |
1516 | gold_unreachable(); | |
1517 | #endif | |
1518 | } | |
61ba1cf9 | 1519 | else |
a3ad94ed | 1520 | gold_unreachable(); |
f6ce93d6 ILT |
1521 | |
1522 | // Now that we have the final symbol table, we can reliably note | |
1523 | // which symbols should get warnings. | |
cb295612 | 1524 | this->warnings_.note_warnings(this); |
f6ce93d6 ILT |
1525 | |
1526 | return ret; | |
75f65a3e ILT |
1527 | } |
1528 | ||
55a93433 ILT |
1529 | // SYM is going into the symbol table at *PINDEX. Add the name to |
1530 | // POOL, update *PINDEX and *POFF. | |
1531 | ||
1532 | template<int size> | |
1533 | void | |
1534 | Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool, | |
1535 | unsigned int* pindex, off_t* poff) | |
1536 | { | |
1537 | sym->set_symtab_index(*pindex); | |
1538 | pool->add(sym->name(), false, NULL); | |
1539 | ++*pindex; | |
1540 | *poff += elfcpp::Elf_sizes<size>::sym_size; | |
1541 | } | |
1542 | ||
ead1e424 ILT |
1543 | // Set the final value for all the symbols. This is called after |
1544 | // Layout::finalize, so all the output sections have their final | |
1545 | // address. | |
75f65a3e ILT |
1546 | |
1547 | template<int size> | |
1548 | off_t | |
55a93433 ILT |
1549 | Symbol_table::sized_finalize(off_t off, Stringpool* pool, |
1550 | unsigned int* plocal_symcount) | |
75f65a3e | 1551 | { |
ead1e424 | 1552 | off = align_address(off, size >> 3); |
75f65a3e ILT |
1553 | this->offset_ = off; |
1554 | ||
55a93433 ILT |
1555 | unsigned int index = *plocal_symcount; |
1556 | const unsigned int orig_index = index; | |
c06b7b0b | 1557 | |
55a93433 ILT |
1558 | // First do all the symbols which have been forced to be local, as |
1559 | // they must appear before all global symbols. | |
1560 | for (Forced_locals::iterator p = this->forced_locals_.begin(); | |
1561 | p != this->forced_locals_.end(); | |
1562 | ++p) | |
1563 | { | |
1564 | Symbol* sym = *p; | |
1565 | gold_assert(sym->is_forced_local()); | |
1566 | if (this->sized_finalize_symbol<size>(sym)) | |
1567 | { | |
1568 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
1569 | ++*plocal_symcount; | |
1570 | } | |
1571 | } | |
1572 | ||
1573 | // Now do all the remaining symbols. | |
c06b7b0b ILT |
1574 | for (Symbol_table_type::iterator p = this->table_.begin(); |
1575 | p != this->table_.end(); | |
1576 | ++p) | |
54dc6425 | 1577 | { |
55a93433 ILT |
1578 | Symbol* sym = p->second; |
1579 | if (this->sized_finalize_symbol<size>(sym)) | |
1580 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
1581 | } | |
54dc6425 | 1582 | |
55a93433 | 1583 | this->output_count_ = index - orig_index; |
a3ad94ed | 1584 | |
55a93433 ILT |
1585 | return off; |
1586 | } | |
75f65a3e | 1587 | |
55a93433 ILT |
1588 | // Finalize the symbol SYM. This returns true if the symbol should be |
1589 | // added to the symbol table, false otherwise. | |
008db82e | 1590 | |
55a93433 ILT |
1591 | template<int size> |
1592 | bool | |
1593 | Symbol_table::sized_finalize_symbol(Symbol* unsized_sym) | |
1594 | { | |
1595 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym); | |
75f65a3e | 1596 | |
55a93433 ILT |
1597 | // The default version of a symbol may appear twice in the symbol |
1598 | // table. We only need to finalize it once. | |
1599 | if (sym->has_symtab_index()) | |
1600 | return false; | |
ead1e424 | 1601 | |
55a93433 ILT |
1602 | if (!sym->in_reg()) |
1603 | { | |
1604 | gold_assert(!sym->has_symtab_index()); | |
1605 | sym->set_symtab_index(-1U); | |
1606 | gold_assert(sym->dynsym_index() == -1U); | |
1607 | return false; | |
1608 | } | |
ead1e424 | 1609 | |
55a93433 | 1610 | typename Sized_symbol<size>::Value_type value; |
ead1e424 | 1611 | |
55a93433 ILT |
1612 | switch (sym->source()) |
1613 | { | |
1614 | case Symbol::FROM_OBJECT: | |
1615 | { | |
1616 | unsigned int shndx = sym->shndx(); | |
ead1e424 | 1617 | |
55a93433 ILT |
1618 | // FIXME: We need some target specific support here. |
1619 | if (shndx >= elfcpp::SHN_LORESERVE | |
1620 | && shndx != elfcpp::SHN_ABS) | |
1621 | { | |
1622 | gold_error(_("%s: unsupported symbol section 0x%x"), | |
1623 | sym->demangled_name().c_str(), shndx); | |
1624 | shndx = elfcpp::SHN_UNDEF; | |
ead1e424 | 1625 | } |
ead1e424 | 1626 | |
55a93433 ILT |
1627 | Object* symobj = sym->object(); |
1628 | if (symobj->is_dynamic()) | |
ead1e424 | 1629 | { |
55a93433 ILT |
1630 | value = 0; |
1631 | shndx = elfcpp::SHN_UNDEF; | |
ead1e424 | 1632 | } |
55a93433 ILT |
1633 | else if (shndx == elfcpp::SHN_UNDEF) |
1634 | value = 0; | |
1635 | else if (shndx == elfcpp::SHN_ABS) | |
1636 | value = sym->value(); | |
1637 | else | |
ead1e424 | 1638 | { |
55a93433 ILT |
1639 | Relobj* relobj = static_cast<Relobj*>(symobj); |
1640 | section_offset_type secoff; | |
1641 | Output_section* os = relobj->output_section(shndx, &secoff); | |
1642 | ||
1643 | if (os == NULL) | |
ead1e424 | 1644 | { |
55a93433 ILT |
1645 | sym->set_symtab_index(-1U); |
1646 | gold_assert(sym->dynsym_index() == -1U); | |
1647 | return false; | |
ead1e424 | 1648 | } |
55a93433 ILT |
1649 | |
1650 | if (sym->type() == elfcpp::STT_TLS) | |
1651 | value = sym->value() + os->tls_offset() + secoff; | |
1652 | else | |
1653 | value = sym->value() + os->address() + secoff; | |
ead1e424 | 1654 | } |
55a93433 ILT |
1655 | } |
1656 | break; | |
1657 | ||
1658 | case Symbol::IN_OUTPUT_DATA: | |
1659 | { | |
1660 | Output_data* od = sym->output_data(); | |
1661 | value = sym->value() + od->address(); | |
1662 | if (sym->offset_is_from_end()) | |
1663 | value += od->data_size(); | |
1664 | } | |
1665 | break; | |
1666 | ||
1667 | case Symbol::IN_OUTPUT_SEGMENT: | |
1668 | { | |
1669 | Output_segment* os = sym->output_segment(); | |
1670 | value = sym->value() + os->vaddr(); | |
1671 | switch (sym->offset_base()) | |
1672 | { | |
1673 | case Symbol::SEGMENT_START: | |
1674 | break; | |
1675 | case Symbol::SEGMENT_END: | |
1676 | value += os->memsz(); | |
1677 | break; | |
1678 | case Symbol::SEGMENT_BSS: | |
1679 | value += os->filesz(); | |
1680 | break; | |
1681 | default: | |
1682 | gold_unreachable(); | |
1683 | } | |
1684 | } | |
1685 | break; | |
ead1e424 | 1686 | |
55a93433 ILT |
1687 | case Symbol::CONSTANT: |
1688 | value = sym->value(); | |
1689 | break; | |
ead1e424 | 1690 | |
55a93433 ILT |
1691 | default: |
1692 | gold_unreachable(); | |
1693 | } | |
ead1e424 | 1694 | |
55a93433 | 1695 | sym->set_value(value); |
9e2dcb77 | 1696 | |
55a93433 ILT |
1697 | if (parameters->strip_all()) |
1698 | { | |
1699 | sym->set_symtab_index(-1U); | |
1700 | return false; | |
54dc6425 | 1701 | } |
75f65a3e | 1702 | |
55a93433 | 1703 | return true; |
54dc6425 ILT |
1704 | } |
1705 | ||
61ba1cf9 ILT |
1706 | // Write out the global symbols. |
1707 | ||
1708 | void | |
9a2d6984 ILT |
1709 | Symbol_table::write_globals(const Input_objects* input_objects, |
1710 | const Stringpool* sympool, | |
16649710 | 1711 | const Stringpool* dynpool, Output_file* of) const |
61ba1cf9 | 1712 | { |
9025d29d | 1713 | if (parameters->get_size() == 32) |
61ba1cf9 | 1714 | { |
9025d29d ILT |
1715 | if (parameters->is_big_endian()) |
1716 | { | |
1717 | #ifdef HAVE_TARGET_32_BIG | |
9a2d6984 ILT |
1718 | this->sized_write_globals<32, true>(input_objects, sympool, |
1719 | dynpool, of); | |
9025d29d ILT |
1720 | #else |
1721 | gold_unreachable(); | |
1722 | #endif | |
1723 | } | |
61ba1cf9 | 1724 | else |
9025d29d ILT |
1725 | { |
1726 | #ifdef HAVE_TARGET_32_LITTLE | |
9a2d6984 ILT |
1727 | this->sized_write_globals<32, false>(input_objects, sympool, |
1728 | dynpool, of); | |
9025d29d ILT |
1729 | #else |
1730 | gold_unreachable(); | |
1731 | #endif | |
1732 | } | |
61ba1cf9 | 1733 | } |
9025d29d | 1734 | else if (parameters->get_size() == 64) |
61ba1cf9 | 1735 | { |
9025d29d ILT |
1736 | if (parameters->is_big_endian()) |
1737 | { | |
1738 | #ifdef HAVE_TARGET_64_BIG | |
9a2d6984 ILT |
1739 | this->sized_write_globals<64, true>(input_objects, sympool, |
1740 | dynpool, of); | |
9025d29d ILT |
1741 | #else |
1742 | gold_unreachable(); | |
1743 | #endif | |
1744 | } | |
61ba1cf9 | 1745 | else |
9025d29d ILT |
1746 | { |
1747 | #ifdef HAVE_TARGET_64_LITTLE | |
9a2d6984 ILT |
1748 | this->sized_write_globals<64, false>(input_objects, sympool, |
1749 | dynpool, of); | |
9025d29d ILT |
1750 | #else |
1751 | gold_unreachable(); | |
1752 | #endif | |
1753 | } | |
61ba1cf9 ILT |
1754 | } |
1755 | else | |
a3ad94ed | 1756 | gold_unreachable(); |
61ba1cf9 ILT |
1757 | } |
1758 | ||
1759 | // Write out the global symbols. | |
1760 | ||
1761 | template<int size, bool big_endian> | |
1762 | void | |
9a2d6984 | 1763 | Symbol_table::sized_write_globals(const Input_objects* input_objects, |
61ba1cf9 | 1764 | const Stringpool* sympool, |
16649710 | 1765 | const Stringpool* dynpool, |
61ba1cf9 ILT |
1766 | Output_file* of) const |
1767 | { | |
9a2d6984 ILT |
1768 | const Target* const target = input_objects->target(); |
1769 | ||
61ba1cf9 | 1770 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
55a93433 ILT |
1771 | |
1772 | const unsigned int output_count = this->output_count_; | |
1773 | const section_size_type oview_size = output_count * sym_size; | |
1774 | const unsigned int first_global_index = this->first_global_index_; | |
16649710 ILT |
1775 | unsigned char* const psyms = of->get_output_view(this->offset_, oview_size); |
1776 | ||
55a93433 ILT |
1777 | const unsigned int dynamic_count = this->dynamic_count_; |
1778 | const section_size_type dynamic_size = dynamic_count * sym_size; | |
1779 | const unsigned int first_dynamic_global_index = | |
1780 | this->first_dynamic_global_index_; | |
16649710 ILT |
1781 | unsigned char* dynamic_view; |
1782 | if (this->dynamic_offset_ == 0) | |
1783 | dynamic_view = NULL; | |
1784 | else | |
1785 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); | |
c06b7b0b | 1786 | |
61ba1cf9 ILT |
1787 | for (Symbol_table_type::const_iterator p = this->table_.begin(); |
1788 | p != this->table_.end(); | |
1789 | ++p) | |
1790 | { | |
1791 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); | |
1792 | ||
9a2d6984 ILT |
1793 | // Possibly warn about unresolved symbols in shared libraries. |
1794 | this->warn_about_undefined_dynobj_symbol(input_objects, sym); | |
e2827e5f | 1795 | |
a3ad94ed | 1796 | unsigned int sym_index = sym->symtab_index(); |
16649710 ILT |
1797 | unsigned int dynsym_index; |
1798 | if (dynamic_view == NULL) | |
1799 | dynsym_index = -1U; | |
1800 | else | |
1801 | dynsym_index = sym->dynsym_index(); | |
1802 | ||
1803 | if (sym_index == -1U && dynsym_index == -1U) | |
a3ad94ed ILT |
1804 | { |
1805 | // This symbol is not included in the output file. | |
1806 | continue; | |
1807 | } | |
16649710 | 1808 | |
ead1e424 | 1809 | unsigned int shndx; |
ab5c9e90 | 1810 | typename elfcpp::Elf_types<32>::Elf_Addr value = sym->value(); |
ead1e424 ILT |
1811 | switch (sym->source()) |
1812 | { | |
1813 | case Symbol::FROM_OBJECT: | |
1814 | { | |
16649710 | 1815 | unsigned int in_shndx = sym->shndx(); |
ead1e424 ILT |
1816 | |
1817 | // FIXME: We need some target specific support here. | |
16649710 ILT |
1818 | if (in_shndx >= elfcpp::SHN_LORESERVE |
1819 | && in_shndx != elfcpp::SHN_ABS) | |
ead1e424 | 1820 | { |
75f2446e | 1821 | gold_error(_("%s: unsupported symbol section 0x%x"), |
a2b1aa12 | 1822 | sym->demangled_name().c_str(), in_shndx); |
75f2446e | 1823 | shndx = in_shndx; |
f6ce93d6 | 1824 | } |
ead1e424 ILT |
1825 | else |
1826 | { | |
75f2446e ILT |
1827 | Object* symobj = sym->object(); |
1828 | if (symobj->is_dynamic()) | |
1829 | { | |
1830 | if (sym->needs_dynsym_value()) | |
1831 | value = target->dynsym_value(sym); | |
1832 | shndx = elfcpp::SHN_UNDEF; | |
1833 | } | |
1834 | else if (in_shndx == elfcpp::SHN_UNDEF | |
1835 | || in_shndx == elfcpp::SHN_ABS) | |
1836 | shndx = in_shndx; | |
1837 | else | |
1838 | { | |
1839 | Relobj* relobj = static_cast<Relobj*>(symobj); | |
8383303e | 1840 | section_offset_type secoff; |
75f2446e ILT |
1841 | Output_section* os = relobj->output_section(in_shndx, |
1842 | &secoff); | |
1843 | gold_assert(os != NULL); | |
1844 | shndx = os->out_shndx(); | |
1845 | } | |
ead1e424 ILT |
1846 | } |
1847 | } | |
1848 | break; | |
1849 | ||
1850 | case Symbol::IN_OUTPUT_DATA: | |
1851 | shndx = sym->output_data()->out_shndx(); | |
1852 | break; | |
1853 | ||
1854 | case Symbol::IN_OUTPUT_SEGMENT: | |
1855 | shndx = elfcpp::SHN_ABS; | |
1856 | break; | |
1857 | ||
1858 | case Symbol::CONSTANT: | |
1859 | shndx = elfcpp::SHN_ABS; | |
1860 | break; | |
1861 | ||
1862 | default: | |
a3ad94ed | 1863 | gold_unreachable(); |
ead1e424 | 1864 | } |
61ba1cf9 | 1865 | |
16649710 ILT |
1866 | if (sym_index != -1U) |
1867 | { | |
55a93433 ILT |
1868 | sym_index -= first_global_index; |
1869 | gold_assert(sym_index < output_count); | |
1870 | unsigned char* ps = psyms + (sym_index * sym_size); | |
6a469986 | 1871 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
ab5c9e90 | 1872 | sym, sym->value(), shndx, sympool, ps |
6a469986 | 1873 | SELECT_SIZE_ENDIAN(size, big_endian)); |
16649710 | 1874 | } |
61ba1cf9 | 1875 | |
16649710 ILT |
1876 | if (dynsym_index != -1U) |
1877 | { | |
1878 | dynsym_index -= first_dynamic_global_index; | |
1879 | gold_assert(dynsym_index < dynamic_count); | |
1880 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
6a469986 | 1881 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
ab5c9e90 | 1882 | sym, value, shndx, dynpool, pd |
6a469986 | 1883 | SELECT_SIZE_ENDIAN(size, big_endian)); |
16649710 | 1884 | } |
61ba1cf9 ILT |
1885 | } |
1886 | ||
c06b7b0b | 1887 | of->write_output_view(this->offset_, oview_size, psyms); |
16649710 ILT |
1888 | if (dynamic_view != NULL) |
1889 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); | |
1890 | } | |
1891 | ||
1892 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the | |
1893 | // strtab holding the name. | |
1894 | ||
1895 | template<int size, bool big_endian> | |
1896 | void | |
ab5c9e90 ILT |
1897 | Symbol_table::sized_write_symbol( |
1898 | Sized_symbol<size>* sym, | |
1899 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
1900 | unsigned int shndx, | |
1901 | const Stringpool* pool, | |
1902 | unsigned char* p | |
1903 | ACCEPT_SIZE_ENDIAN) const | |
16649710 ILT |
1904 | { |
1905 | elfcpp::Sym_write<size, big_endian> osym(p); | |
1906 | osym.put_st_name(pool->get_offset(sym->name())); | |
ab5c9e90 | 1907 | osym.put_st_value(value); |
16649710 | 1908 | osym.put_st_size(sym->symsize()); |
55a93433 ILT |
1909 | // A version script may have overridden the default binding. |
1910 | if (sym->is_forced_local()) | |
1911 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, sym->type())); | |
1912 | else | |
1913 | osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type())); | |
16649710 ILT |
1914 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); |
1915 | osym.put_st_shndx(shndx); | |
61ba1cf9 ILT |
1916 | } |
1917 | ||
9a2d6984 ILT |
1918 | // Check for unresolved symbols in shared libraries. This is |
1919 | // controlled by the --allow-shlib-undefined option. | |
1920 | ||
1921 | // We only warn about libraries for which we have seen all the | |
1922 | // DT_NEEDED entries. We don't try to track down DT_NEEDED entries | |
1923 | // which were not seen in this link. If we didn't see a DT_NEEDED | |
1924 | // entry, we aren't going to be able to reliably report whether the | |
1925 | // symbol is undefined. | |
1926 | ||
1927 | // We also don't warn about libraries found in the system library | |
1928 | // directory (the directory were we find libc.so); we assume that | |
1929 | // those libraries are OK. This heuristic avoids problems in | |
1930 | // GNU/Linux, in which -ldl can have undefined references satisfied by | |
1931 | // ld-linux.so. | |
1932 | ||
1933 | inline void | |
1934 | Symbol_table::warn_about_undefined_dynobj_symbol( | |
1935 | const Input_objects* input_objects, | |
1936 | Symbol* sym) const | |
1937 | { | |
1938 | if (sym->source() == Symbol::FROM_OBJECT | |
1939 | && sym->object()->is_dynamic() | |
1940 | && sym->shndx() == elfcpp::SHN_UNDEF | |
1941 | && sym->binding() != elfcpp::STB_WEAK | |
1942 | && !parameters->allow_shlib_undefined() | |
1943 | && !input_objects->target()->is_defined_by_abi(sym) | |
1944 | && !input_objects->found_in_system_library_directory(sym->object())) | |
1945 | { | |
1946 | // A very ugly cast. | |
1947 | Dynobj* dynobj = static_cast<Dynobj*>(sym->object()); | |
1948 | if (!dynobj->has_unknown_needed_entries()) | |
1949 | gold_error(_("%s: undefined reference to '%s'"), | |
a2b1aa12 ILT |
1950 | sym->object()->name().c_str(), |
1951 | sym->demangled_name().c_str()); | |
9a2d6984 ILT |
1952 | } |
1953 | } | |
1954 | ||
a3ad94ed ILT |
1955 | // Write out a section symbol. Return the update offset. |
1956 | ||
1957 | void | |
9025d29d | 1958 | Symbol_table::write_section_symbol(const Output_section *os, |
a3ad94ed ILT |
1959 | Output_file* of, |
1960 | off_t offset) const | |
1961 | { | |
9025d29d | 1962 | if (parameters->get_size() == 32) |
a3ad94ed | 1963 | { |
9025d29d ILT |
1964 | if (parameters->is_big_endian()) |
1965 | { | |
1966 | #ifdef HAVE_TARGET_32_BIG | |
1967 | this->sized_write_section_symbol<32, true>(os, of, offset); | |
1968 | #else | |
1969 | gold_unreachable(); | |
1970 | #endif | |
1971 | } | |
a3ad94ed | 1972 | else |
9025d29d ILT |
1973 | { |
1974 | #ifdef HAVE_TARGET_32_LITTLE | |
1975 | this->sized_write_section_symbol<32, false>(os, of, offset); | |
1976 | #else | |
1977 | gold_unreachable(); | |
1978 | #endif | |
1979 | } | |
a3ad94ed | 1980 | } |
9025d29d | 1981 | else if (parameters->get_size() == 64) |
a3ad94ed | 1982 | { |
9025d29d ILT |
1983 | if (parameters->is_big_endian()) |
1984 | { | |
1985 | #ifdef HAVE_TARGET_64_BIG | |
1986 | this->sized_write_section_symbol<64, true>(os, of, offset); | |
1987 | #else | |
1988 | gold_unreachable(); | |
1989 | #endif | |
1990 | } | |
a3ad94ed | 1991 | else |
9025d29d ILT |
1992 | { |
1993 | #ifdef HAVE_TARGET_64_LITTLE | |
1994 | this->sized_write_section_symbol<64, false>(os, of, offset); | |
1995 | #else | |
1996 | gold_unreachable(); | |
1997 | #endif | |
1998 | } | |
a3ad94ed ILT |
1999 | } |
2000 | else | |
2001 | gold_unreachable(); | |
2002 | } | |
2003 | ||
2004 | // Write out a section symbol, specialized for size and endianness. | |
2005 | ||
2006 | template<int size, bool big_endian> | |
2007 | void | |
2008 | Symbol_table::sized_write_section_symbol(const Output_section* os, | |
2009 | Output_file* of, | |
2010 | off_t offset) const | |
2011 | { | |
2012 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2013 | ||
2014 | unsigned char* pov = of->get_output_view(offset, sym_size); | |
2015 | ||
2016 | elfcpp::Sym_write<size, big_endian> osym(pov); | |
2017 | osym.put_st_name(0); | |
2018 | osym.put_st_value(os->address()); | |
2019 | osym.put_st_size(0); | |
2020 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, | |
2021 | elfcpp::STT_SECTION)); | |
2022 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); | |
2023 | osym.put_st_shndx(os->out_shndx()); | |
2024 | ||
2025 | of->write_output_view(offset, sym_size, pov); | |
2026 | } | |
2027 | ||
abaa3995 ILT |
2028 | // Print statistical information to stderr. This is used for --stats. |
2029 | ||
2030 | void | |
2031 | Symbol_table::print_stats() const | |
2032 | { | |
2033 | #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP) | |
2034 | fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"), | |
2035 | program_name, this->table_.size(), this->table_.bucket_count()); | |
2036 | #else | |
2037 | fprintf(stderr, _("%s: symbol table entries: %zu\n"), | |
2038 | program_name, this->table_.size()); | |
2039 | #endif | |
ad8f37d1 | 2040 | this->namepool_.print_stats("symbol table stringpool"); |
abaa3995 ILT |
2041 | } |
2042 | ||
ff541f30 ILT |
2043 | // We check for ODR violations by looking for symbols with the same |
2044 | // name for which the debugging information reports that they were | |
2045 | // defined in different source locations. When comparing the source | |
2046 | // location, we consider instances with the same base filename and | |
2047 | // line number to be the same. This is because different object | |
2048 | // files/shared libraries can include the same header file using | |
2049 | // different paths, and we don't want to report an ODR violation in | |
2050 | // that case. | |
2051 | ||
2052 | // This struct is used to compare line information, as returned by | |
7bf1f802 | 2053 | // Dwarf_line_info::one_addr2line. It implements a < comparison |
ff541f30 ILT |
2054 | // operator used with std::set. |
2055 | ||
2056 | struct Odr_violation_compare | |
2057 | { | |
2058 | bool | |
2059 | operator()(const std::string& s1, const std::string& s2) const | |
2060 | { | |
2061 | std::string::size_type pos1 = s1.rfind('/'); | |
2062 | std::string::size_type pos2 = s2.rfind('/'); | |
2063 | if (pos1 == std::string::npos | |
2064 | || pos2 == std::string::npos) | |
2065 | return s1 < s2; | |
2066 | return s1.compare(pos1, std::string::npos, | |
2067 | s2, pos2, std::string::npos) < 0; | |
2068 | } | |
2069 | }; | |
2070 | ||
70e654ba ILT |
2071 | // Check candidate_odr_violations_ to find symbols with the same name |
2072 | // but apparently different definitions (different source-file/line-no). | |
2073 | ||
2074 | void | |
17a1d0a9 ILT |
2075 | Symbol_table::detect_odr_violations(const Task* task, |
2076 | const char* output_file_name) const | |
70e654ba ILT |
2077 | { |
2078 | for (Odr_map::const_iterator it = candidate_odr_violations_.begin(); | |
2079 | it != candidate_odr_violations_.end(); | |
2080 | ++it) | |
2081 | { | |
2082 | const char* symbol_name = it->first; | |
2083 | // We use a sorted set so the output is deterministic. | |
ff541f30 | 2084 | std::set<std::string, Odr_violation_compare> line_nums; |
70e654ba | 2085 | |
b01c0a4a ILT |
2086 | for (Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator |
2087 | locs = it->second.begin(); | |
2088 | locs != it->second.end(); | |
2089 | ++locs) | |
70e654ba ILT |
2090 | { |
2091 | // We need to lock the object in order to read it. This | |
17a1d0a9 ILT |
2092 | // means that we have to run in a singleton Task. If we |
2093 | // want to run this in a general Task for better | |
2094 | // performance, we will need one Task for object, plus | |
2095 | // appropriate locking to ensure that we don't conflict with | |
2096 | // other uses of the object. | |
2097 | Task_lock_obj<Object> tl(task, locs->object); | |
a55ce7fe ILT |
2098 | std::string lineno = Dwarf_line_info::one_addr2line( |
2099 | locs->object, locs->shndx, locs->offset); | |
70e654ba ILT |
2100 | if (!lineno.empty()) |
2101 | line_nums.insert(lineno); | |
2102 | } | |
2103 | ||
2104 | if (line_nums.size() > 1) | |
2105 | { | |
dd8670e5 | 2106 | gold_warning(_("while linking %s: symbol '%s' defined in multiple " |
78f15696 | 2107 | "places (possible ODR violation):"), |
a2b1aa12 | 2108 | output_file_name, demangle(symbol_name).c_str()); |
70e654ba ILT |
2109 | for (std::set<std::string>::const_iterator it2 = line_nums.begin(); |
2110 | it2 != line_nums.end(); | |
2111 | ++it2) | |
2112 | fprintf(stderr, " %s\n", it2->c_str()); | |
2113 | } | |
2114 | } | |
2115 | } | |
2116 | ||
f6ce93d6 ILT |
2117 | // Warnings functions. |
2118 | ||
2119 | // Add a new warning. | |
2120 | ||
2121 | void | |
2122 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, | |
cb295612 | 2123 | const std::string& warning) |
f6ce93d6 ILT |
2124 | { |
2125 | name = symtab->canonicalize_name(name); | |
cb295612 | 2126 | this->warnings_[name].set(obj, warning); |
f6ce93d6 ILT |
2127 | } |
2128 | ||
2129 | // Look through the warnings and mark the symbols for which we should | |
2130 | // warn. This is called during Layout::finalize when we know the | |
2131 | // sources for all the symbols. | |
2132 | ||
2133 | void | |
cb295612 | 2134 | Warnings::note_warnings(Symbol_table* symtab) |
f6ce93d6 ILT |
2135 | { |
2136 | for (Warning_table::iterator p = this->warnings_.begin(); | |
2137 | p != this->warnings_.end(); | |
2138 | ++p) | |
2139 | { | |
2140 | Symbol* sym = symtab->lookup(p->first, NULL); | |
2141 | if (sym != NULL | |
2142 | && sym->source() == Symbol::FROM_OBJECT | |
2143 | && sym->object() == p->second.object) | |
cb295612 | 2144 | sym->set_has_warning(); |
f6ce93d6 ILT |
2145 | } |
2146 | } | |
2147 | ||
2148 | // Issue a warning. This is called when we see a relocation against a | |
2149 | // symbol for which has a warning. | |
2150 | ||
75f2446e | 2151 | template<int size, bool big_endian> |
f6ce93d6 | 2152 | void |
75f2446e ILT |
2153 | Warnings::issue_warning(const Symbol* sym, |
2154 | const Relocate_info<size, big_endian>* relinfo, | |
2155 | size_t relnum, off_t reloffset) const | |
f6ce93d6 | 2156 | { |
a3ad94ed | 2157 | gold_assert(sym->has_warning()); |
f6ce93d6 | 2158 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
a3ad94ed | 2159 | gold_assert(p != this->warnings_.end()); |
75f2446e ILT |
2160 | gold_warning_at_location(relinfo, relnum, reloffset, |
2161 | "%s", p->second.text.c_str()); | |
f6ce93d6 ILT |
2162 | } |
2163 | ||
14bfc3f5 ILT |
2164 | // Instantiate the templates we need. We could use the configure |
2165 | // script to restrict this to only the ones needed for implemented | |
2166 | // targets. | |
2167 | ||
c7912668 ILT |
2168 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
2169 | template | |
2170 | void | |
2171 | Sized_symbol<32>::allocate_common(Output_data*, Value_type); | |
2172 | #endif | |
2173 | ||
2174 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
2175 | template | |
2176 | void | |
2177 | Sized_symbol<64>::allocate_common(Output_data*, Value_type); | |
2178 | #endif | |
2179 | ||
193a53d9 | 2180 | #ifdef HAVE_TARGET_32_LITTLE |
14bfc3f5 ILT |
2181 | template |
2182 | void | |
193a53d9 ILT |
2183 | Symbol_table::add_from_relobj<32, false>( |
2184 | Sized_relobj<32, false>* relobj, | |
f6ce93d6 | 2185 | const unsigned char* syms, |
14bfc3f5 ILT |
2186 | size_t count, |
2187 | const char* sym_names, | |
2188 | size_t sym_name_size, | |
730cdc88 | 2189 | Sized_relobj<32, true>::Symbols* sympointers); |
193a53d9 | 2190 | #endif |
14bfc3f5 | 2191 | |
193a53d9 | 2192 | #ifdef HAVE_TARGET_32_BIG |
14bfc3f5 ILT |
2193 | template |
2194 | void | |
193a53d9 ILT |
2195 | Symbol_table::add_from_relobj<32, true>( |
2196 | Sized_relobj<32, true>* relobj, | |
f6ce93d6 | 2197 | const unsigned char* syms, |
14bfc3f5 ILT |
2198 | size_t count, |
2199 | const char* sym_names, | |
2200 | size_t sym_name_size, | |
730cdc88 | 2201 | Sized_relobj<32, false>::Symbols* sympointers); |
193a53d9 | 2202 | #endif |
14bfc3f5 | 2203 | |
193a53d9 | 2204 | #ifdef HAVE_TARGET_64_LITTLE |
14bfc3f5 ILT |
2205 | template |
2206 | void | |
193a53d9 ILT |
2207 | Symbol_table::add_from_relobj<64, false>( |
2208 | Sized_relobj<64, false>* relobj, | |
f6ce93d6 | 2209 | const unsigned char* syms, |
14bfc3f5 ILT |
2210 | size_t count, |
2211 | const char* sym_names, | |
2212 | size_t sym_name_size, | |
730cdc88 | 2213 | Sized_relobj<64, true>::Symbols* sympointers); |
193a53d9 | 2214 | #endif |
14bfc3f5 | 2215 | |
193a53d9 | 2216 | #ifdef HAVE_TARGET_64_BIG |
14bfc3f5 ILT |
2217 | template |
2218 | void | |
193a53d9 ILT |
2219 | Symbol_table::add_from_relobj<64, true>( |
2220 | Sized_relobj<64, true>* relobj, | |
f6ce93d6 | 2221 | const unsigned char* syms, |
14bfc3f5 ILT |
2222 | size_t count, |
2223 | const char* sym_names, | |
2224 | size_t sym_name_size, | |
730cdc88 | 2225 | Sized_relobj<64, false>::Symbols* sympointers); |
193a53d9 | 2226 | #endif |
14bfc3f5 | 2227 | |
193a53d9 | 2228 | #ifdef HAVE_TARGET_32_LITTLE |
dbe717ef ILT |
2229 | template |
2230 | void | |
193a53d9 ILT |
2231 | Symbol_table::add_from_dynobj<32, false>( |
2232 | Sized_dynobj<32, false>* dynobj, | |
dbe717ef ILT |
2233 | const unsigned char* syms, |
2234 | size_t count, | |
2235 | const char* sym_names, | |
2236 | size_t sym_name_size, | |
2237 | const unsigned char* versym, | |
2238 | size_t versym_size, | |
2239 | const std::vector<const char*>* version_map); | |
193a53d9 | 2240 | #endif |
dbe717ef | 2241 | |
193a53d9 | 2242 | #ifdef HAVE_TARGET_32_BIG |
dbe717ef ILT |
2243 | template |
2244 | void | |
193a53d9 ILT |
2245 | Symbol_table::add_from_dynobj<32, true>( |
2246 | Sized_dynobj<32, true>* dynobj, | |
dbe717ef ILT |
2247 | const unsigned char* syms, |
2248 | size_t count, | |
2249 | const char* sym_names, | |
2250 | size_t sym_name_size, | |
2251 | const unsigned char* versym, | |
2252 | size_t versym_size, | |
2253 | const std::vector<const char*>* version_map); | |
193a53d9 | 2254 | #endif |
dbe717ef | 2255 | |
193a53d9 | 2256 | #ifdef HAVE_TARGET_64_LITTLE |
dbe717ef ILT |
2257 | template |
2258 | void | |
193a53d9 ILT |
2259 | Symbol_table::add_from_dynobj<64, false>( |
2260 | Sized_dynobj<64, false>* dynobj, | |
dbe717ef ILT |
2261 | const unsigned char* syms, |
2262 | size_t count, | |
2263 | const char* sym_names, | |
2264 | size_t sym_name_size, | |
2265 | const unsigned char* versym, | |
2266 | size_t versym_size, | |
2267 | const std::vector<const char*>* version_map); | |
193a53d9 | 2268 | #endif |
dbe717ef | 2269 | |
193a53d9 | 2270 | #ifdef HAVE_TARGET_64_BIG |
dbe717ef ILT |
2271 | template |
2272 | void | |
193a53d9 ILT |
2273 | Symbol_table::add_from_dynobj<64, true>( |
2274 | Sized_dynobj<64, true>* dynobj, | |
dbe717ef ILT |
2275 | const unsigned char* syms, |
2276 | size_t count, | |
2277 | const char* sym_names, | |
2278 | size_t sym_name_size, | |
2279 | const unsigned char* versym, | |
2280 | size_t versym_size, | |
2281 | const std::vector<const char*>* version_map); | |
193a53d9 | 2282 | #endif |
dbe717ef | 2283 | |
46fe1623 ILT |
2284 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
2285 | template | |
2286 | void | |
fe8718a4 | 2287 | Symbol_table::define_with_copy_reloc<32>( |
fe8718a4 ILT |
2288 | Sized_symbol<32>* sym, |
2289 | Output_data* posd, | |
2290 | elfcpp::Elf_types<32>::Elf_Addr value); | |
46fe1623 ILT |
2291 | #endif |
2292 | ||
2293 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
2294 | template | |
2295 | void | |
fe8718a4 | 2296 | Symbol_table::define_with_copy_reloc<64>( |
fe8718a4 ILT |
2297 | Sized_symbol<64>* sym, |
2298 | Output_data* posd, | |
2299 | elfcpp::Elf_types<64>::Elf_Addr value); | |
46fe1623 ILT |
2300 | #endif |
2301 | ||
75f2446e ILT |
2302 | #ifdef HAVE_TARGET_32_LITTLE |
2303 | template | |
2304 | void | |
2305 | Warnings::issue_warning<32, false>(const Symbol* sym, | |
2306 | const Relocate_info<32, false>* relinfo, | |
2307 | size_t relnum, off_t reloffset) const; | |
2308 | #endif | |
2309 | ||
2310 | #ifdef HAVE_TARGET_32_BIG | |
2311 | template | |
2312 | void | |
2313 | Warnings::issue_warning<32, true>(const Symbol* sym, | |
2314 | const Relocate_info<32, true>* relinfo, | |
2315 | size_t relnum, off_t reloffset) const; | |
2316 | #endif | |
2317 | ||
2318 | #ifdef HAVE_TARGET_64_LITTLE | |
2319 | template | |
2320 | void | |
2321 | Warnings::issue_warning<64, false>(const Symbol* sym, | |
2322 | const Relocate_info<64, false>* relinfo, | |
2323 | size_t relnum, off_t reloffset) const; | |
2324 | #endif | |
2325 | ||
2326 | #ifdef HAVE_TARGET_64_BIG | |
2327 | template | |
2328 | void | |
2329 | Warnings::issue_warning<64, true>(const Symbol* sym, | |
2330 | const Relocate_info<64, true>* relinfo, | |
2331 | size_t relnum, off_t reloffset) const; | |
2332 | #endif | |
2333 | ||
14bfc3f5 | 2334 | } // End namespace gold. |