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14bfc3f5 ILT |
1 | // symtab.cc -- the gold symbol table |
2 | ||
3 | #include "gold.h" | |
4 | ||
14bfc3f5 ILT |
5 | #include <stdint.h> |
6 | #include <string> | |
7 | #include <utility> | |
8 | ||
9 | #include "object.h" | |
dbe717ef | 10 | #include "dynobj.h" |
75f65a3e | 11 | #include "output.h" |
61ba1cf9 | 12 | #include "target.h" |
645f8123 | 13 | #include "workqueue.h" |
14bfc3f5 ILT |
14 | #include "symtab.h" |
15 | ||
16 | namespace gold | |
17 | { | |
18 | ||
19 | // Class Symbol. | |
20 | ||
ead1e424 ILT |
21 | // Initialize fields in Symbol. This initializes everything except u_ |
22 | // and source_. | |
14bfc3f5 | 23 | |
14bfc3f5 | 24 | void |
ead1e424 ILT |
25 | Symbol::init_fields(const char* name, const char* version, |
26 | elfcpp::STT type, elfcpp::STB binding, | |
27 | elfcpp::STV visibility, unsigned char nonvis) | |
14bfc3f5 ILT |
28 | { |
29 | this->name_ = name; | |
30 | this->version_ = version; | |
c06b7b0b ILT |
31 | this->symtab_index_ = 0; |
32 | this->dynsym_index_ = 0; | |
ead1e424 ILT |
33 | this->got_offset_ = 0; |
34 | this->type_ = type; | |
35 | this->binding_ = binding; | |
36 | this->visibility_ = visibility; | |
37 | this->nonvis_ = nonvis; | |
38 | this->is_target_special_ = false; | |
1564db8d ILT |
39 | this->is_def_ = false; |
40 | this->is_forwarder_ = false; | |
c06b7b0b | 41 | this->needs_dynsym_entry_ = false; |
008db82e | 42 | this->in_reg_ = false; |
ead1e424 ILT |
43 | this->in_dyn_ = false; |
44 | this->has_got_offset_ = false; | |
f6ce93d6 | 45 | this->has_warning_ = false; |
ead1e424 ILT |
46 | } |
47 | ||
48 | // Initialize the fields in the base class Symbol for SYM in OBJECT. | |
49 | ||
50 | template<int size, bool big_endian> | |
51 | void | |
52 | Symbol::init_base(const char* name, const char* version, Object* object, | |
53 | const elfcpp::Sym<size, big_endian>& sym) | |
54 | { | |
55 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), | |
56 | sym.get_st_visibility(), sym.get_st_nonvis()); | |
57 | this->u_.from_object.object = object; | |
58 | // FIXME: Handle SHN_XINDEX. | |
16649710 | 59 | this->u_.from_object.shndx = sym.get_st_shndx(); |
ead1e424 | 60 | this->source_ = FROM_OBJECT; |
008db82e | 61 | this->in_reg_ = !object->is_dynamic(); |
1564db8d | 62 | this->in_dyn_ = object->is_dynamic(); |
14bfc3f5 ILT |
63 | } |
64 | ||
ead1e424 ILT |
65 | // Initialize the fields in the base class Symbol for a symbol defined |
66 | // in an Output_data. | |
67 | ||
68 | void | |
69 | Symbol::init_base(const char* name, Output_data* od, elfcpp::STT type, | |
70 | elfcpp::STB binding, elfcpp::STV visibility, | |
71 | unsigned char nonvis, bool offset_is_from_end) | |
72 | { | |
73 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
74 | this->u_.in_output_data.output_data = od; | |
75 | this->u_.in_output_data.offset_is_from_end = offset_is_from_end; | |
76 | this->source_ = IN_OUTPUT_DATA; | |
008db82e | 77 | this->in_reg_ = true; |
ead1e424 ILT |
78 | } |
79 | ||
80 | // Initialize the fields in the base class Symbol for a symbol defined | |
81 | // in an Output_segment. | |
82 | ||
83 | void | |
84 | Symbol::init_base(const char* name, Output_segment* os, elfcpp::STT type, | |
85 | elfcpp::STB binding, elfcpp::STV visibility, | |
86 | unsigned char nonvis, Segment_offset_base offset_base) | |
87 | { | |
88 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
89 | this->u_.in_output_segment.output_segment = os; | |
90 | this->u_.in_output_segment.offset_base = offset_base; | |
91 | this->source_ = IN_OUTPUT_SEGMENT; | |
008db82e | 92 | this->in_reg_ = true; |
ead1e424 ILT |
93 | } |
94 | ||
95 | // Initialize the fields in the base class Symbol for a symbol defined | |
96 | // as a constant. | |
97 | ||
98 | void | |
99 | Symbol::init_base(const char* name, elfcpp::STT type, | |
100 | elfcpp::STB binding, elfcpp::STV visibility, | |
101 | unsigned char nonvis) | |
102 | { | |
103 | this->init_fields(name, NULL, type, binding, visibility, nonvis); | |
104 | this->source_ = CONSTANT; | |
008db82e | 105 | this->in_reg_ = true; |
ead1e424 ILT |
106 | } |
107 | ||
108 | // Initialize the fields in Sized_symbol for SYM in OBJECT. | |
14bfc3f5 ILT |
109 | |
110 | template<int size> | |
111 | template<bool big_endian> | |
112 | void | |
113 | Sized_symbol<size>::init(const char* name, const char* version, Object* object, | |
114 | const elfcpp::Sym<size, big_endian>& sym) | |
115 | { | |
116 | this->init_base(name, version, object, sym); | |
117 | this->value_ = sym.get_st_value(); | |
ead1e424 ILT |
118 | this->symsize_ = sym.get_st_size(); |
119 | } | |
120 | ||
121 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
122 | // Output_data. | |
123 | ||
124 | template<int size> | |
125 | void | |
126 | Sized_symbol<size>::init(const char* name, Output_data* od, | |
127 | Value_type value, Size_type symsize, | |
128 | elfcpp::STT type, elfcpp::STB binding, | |
129 | elfcpp::STV visibility, unsigned char nonvis, | |
130 | bool offset_is_from_end) | |
131 | { | |
132 | this->init_base(name, od, type, binding, visibility, nonvis, | |
133 | offset_is_from_end); | |
134 | this->value_ = value; | |
135 | this->symsize_ = symsize; | |
136 | } | |
137 | ||
138 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
139 | // Output_segment. | |
140 | ||
141 | template<int size> | |
142 | void | |
143 | Sized_symbol<size>::init(const char* name, Output_segment* os, | |
144 | Value_type value, Size_type symsize, | |
145 | elfcpp::STT type, elfcpp::STB binding, | |
146 | elfcpp::STV visibility, unsigned char nonvis, | |
147 | Segment_offset_base offset_base) | |
148 | { | |
149 | this->init_base(name, os, type, binding, visibility, nonvis, offset_base); | |
150 | this->value_ = value; | |
151 | this->symsize_ = symsize; | |
152 | } | |
153 | ||
154 | // Initialize the fields in Sized_symbol for a symbol defined as a | |
155 | // constant. | |
156 | ||
157 | template<int size> | |
158 | void | |
159 | Sized_symbol<size>::init(const char* name, Value_type value, Size_type symsize, | |
160 | elfcpp::STT type, elfcpp::STB binding, | |
161 | elfcpp::STV visibility, unsigned char nonvis) | |
162 | { | |
163 | this->init_base(name, type, binding, visibility, nonvis); | |
164 | this->value_ = value; | |
165 | this->symsize_ = symsize; | |
14bfc3f5 ILT |
166 | } |
167 | ||
168 | // Class Symbol_table. | |
169 | ||
170 | Symbol_table::Symbol_table() | |
ead1e424 | 171 | : size_(0), saw_undefined_(0), offset_(0), table_(), namepool_(), |
f6ce93d6 | 172 | forwarders_(), commons_(), warnings_() |
14bfc3f5 ILT |
173 | { |
174 | } | |
175 | ||
176 | Symbol_table::~Symbol_table() | |
177 | { | |
178 | } | |
179 | ||
180 | // The hash function. The key is always canonicalized, so we use a | |
181 | // simple combination of the pointers. | |
182 | ||
183 | size_t | |
184 | Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const | |
185 | { | |
f0641a0b | 186 | return key.first ^ key.second; |
14bfc3f5 ILT |
187 | } |
188 | ||
189 | // The symbol table key equality function. This is only called with | |
190 | // canonicalized name and version strings, so we can use pointer | |
191 | // comparison. | |
192 | ||
193 | bool | |
194 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, | |
195 | const Symbol_table_key& k2) const | |
196 | { | |
197 | return k1.first == k2.first && k1.second == k2.second; | |
198 | } | |
199 | ||
200 | // Make TO a symbol which forwards to FROM. | |
201 | ||
202 | void | |
203 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) | |
204 | { | |
a3ad94ed ILT |
205 | gold_assert(from != to); |
206 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); | |
14bfc3f5 ILT |
207 | this->forwarders_[from] = to; |
208 | from->set_forwarder(); | |
209 | } | |
210 | ||
61ba1cf9 ILT |
211 | // Resolve the forwards from FROM, returning the real symbol. |
212 | ||
14bfc3f5 | 213 | Symbol* |
c06b7b0b | 214 | Symbol_table::resolve_forwards(const Symbol* from) const |
14bfc3f5 | 215 | { |
a3ad94ed | 216 | gold_assert(from->is_forwarder()); |
c06b7b0b | 217 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
14bfc3f5 | 218 | this->forwarders_.find(from); |
a3ad94ed | 219 | gold_assert(p != this->forwarders_.end()); |
14bfc3f5 ILT |
220 | return p->second; |
221 | } | |
222 | ||
61ba1cf9 ILT |
223 | // Look up a symbol by name. |
224 | ||
225 | Symbol* | |
226 | Symbol_table::lookup(const char* name, const char* version) const | |
227 | { | |
f0641a0b ILT |
228 | Stringpool::Key name_key; |
229 | name = this->namepool_.find(name, &name_key); | |
61ba1cf9 ILT |
230 | if (name == NULL) |
231 | return NULL; | |
f0641a0b ILT |
232 | |
233 | Stringpool::Key version_key = 0; | |
61ba1cf9 ILT |
234 | if (version != NULL) |
235 | { | |
f0641a0b | 236 | version = this->namepool_.find(version, &version_key); |
61ba1cf9 ILT |
237 | if (version == NULL) |
238 | return NULL; | |
239 | } | |
240 | ||
f0641a0b | 241 | Symbol_table_key key(name_key, version_key); |
61ba1cf9 ILT |
242 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
243 | if (p == this->table_.end()) | |
244 | return NULL; | |
245 | return p->second; | |
246 | } | |
247 | ||
14bfc3f5 ILT |
248 | // Resolve a Symbol with another Symbol. This is only used in the |
249 | // unusual case where there are references to both an unversioned | |
250 | // symbol and a symbol with a version, and we then discover that that | |
1564db8d ILT |
251 | // version is the default version. Because this is unusual, we do |
252 | // this the slow way, by converting back to an ELF symbol. | |
14bfc3f5 | 253 | |
1564db8d | 254 | template<int size, bool big_endian> |
14bfc3f5 | 255 | void |
14b31740 ILT |
256 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from, |
257 | const char* version ACCEPT_SIZE_ENDIAN) | |
14bfc3f5 | 258 | { |
1564db8d ILT |
259 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
260 | elfcpp::Sym_write<size, big_endian> esym(buf); | |
261 | // We don't bother to set the st_name field. | |
262 | esym.put_st_value(from->value()); | |
263 | esym.put_st_size(from->symsize()); | |
264 | esym.put_st_info(from->binding(), from->type()); | |
ead1e424 | 265 | esym.put_st_other(from->visibility(), from->nonvis()); |
16649710 | 266 | esym.put_st_shndx(from->shndx()); |
14b31740 | 267 | Symbol_table::resolve(to, esym.sym(), from->object(), version); |
14bfc3f5 ILT |
268 | } |
269 | ||
270 | // Add one symbol from OBJECT to the symbol table. NAME is symbol | |
271 | // name and VERSION is the version; both are canonicalized. DEF is | |
272 | // whether this is the default version. | |
273 | ||
274 | // If DEF is true, then this is the definition of a default version of | |
275 | // a symbol. That means that any lookup of NAME/NULL and any lookup | |
276 | // of NAME/VERSION should always return the same symbol. This is | |
277 | // obvious for references, but in particular we want to do this for | |
278 | // definitions: overriding NAME/NULL should also override | |
279 | // NAME/VERSION. If we don't do that, it would be very hard to | |
280 | // override functions in a shared library which uses versioning. | |
281 | ||
282 | // We implement this by simply making both entries in the hash table | |
283 | // point to the same Symbol structure. That is easy enough if this is | |
284 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible | |
285 | // that we have seen both already, in which case they will both have | |
286 | // independent entries in the symbol table. We can't simply change | |
287 | // the symbol table entry, because we have pointers to the entries | |
288 | // attached to the object files. So we mark the entry attached to the | |
289 | // object file as a forwarder, and record it in the forwarders_ map. | |
290 | // Note that entries in the hash table will never be marked as | |
291 | // forwarders. | |
292 | ||
293 | template<int size, bool big_endian> | |
294 | Symbol* | |
f6ce93d6 | 295 | Symbol_table::add_from_object(Object* object, |
14bfc3f5 | 296 | const char *name, |
f0641a0b ILT |
297 | Stringpool::Key name_key, |
298 | const char *version, | |
299 | Stringpool::Key version_key, | |
300 | bool def, | |
14bfc3f5 ILT |
301 | const elfcpp::Sym<size, big_endian>& sym) |
302 | { | |
303 | Symbol* const snull = NULL; | |
304 | std::pair<typename Symbol_table_type::iterator, bool> ins = | |
f0641a0b ILT |
305 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
306 | snull)); | |
14bfc3f5 ILT |
307 | |
308 | std::pair<typename Symbol_table_type::iterator, bool> insdef = | |
309 | std::make_pair(this->table_.end(), false); | |
310 | if (def) | |
311 | { | |
f0641a0b ILT |
312 | const Stringpool::Key vnull_key = 0; |
313 | insdef = this->table_.insert(std::make_pair(std::make_pair(name_key, | |
314 | vnull_key), | |
14bfc3f5 ILT |
315 | snull)); |
316 | } | |
317 | ||
318 | // ins.first: an iterator, which is a pointer to a pair. | |
319 | // ins.first->first: the key (a pair of name and version). | |
320 | // ins.first->second: the value (Symbol*). | |
321 | // ins.second: true if new entry was inserted, false if not. | |
322 | ||
1564db8d | 323 | Sized_symbol<size>* ret; |
ead1e424 ILT |
324 | bool was_undefined; |
325 | bool was_common; | |
14bfc3f5 ILT |
326 | if (!ins.second) |
327 | { | |
328 | // We already have an entry for NAME/VERSION. | |
593f47df ILT |
329 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (ins.first->second |
330 | SELECT_SIZE(size)); | |
a3ad94ed | 331 | gold_assert(ret != NULL); |
ead1e424 ILT |
332 | |
333 | was_undefined = ret->is_undefined(); | |
334 | was_common = ret->is_common(); | |
335 | ||
14b31740 | 336 | Symbol_table::resolve(ret, sym, object, version); |
14bfc3f5 ILT |
337 | |
338 | if (def) | |
339 | { | |
340 | if (insdef.second) | |
341 | { | |
342 | // This is the first time we have seen NAME/NULL. Make | |
343 | // NAME/NULL point to NAME/VERSION. | |
344 | insdef.first->second = ret; | |
345 | } | |
dbe717ef | 346 | else if (insdef.first->second != ret) |
14bfc3f5 ILT |
347 | { |
348 | // This is the unfortunate case where we already have | |
349 | // entries for both NAME/VERSION and NAME/NULL. | |
274e99f9 | 350 | const Sized_symbol<size>* sym2; |
593f47df | 351 | sym2 = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d ILT |
352 | insdef.first->second |
353 | SELECT_SIZE(size)); | |
593f47df | 354 | Symbol_table::resolve SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
14b31740 | 355 | ret, sym2, version SELECT_SIZE_ENDIAN(size, big_endian)); |
14bfc3f5 ILT |
356 | this->make_forwarder(insdef.first->second, ret); |
357 | insdef.first->second = ret; | |
358 | } | |
359 | } | |
360 | } | |
361 | else | |
362 | { | |
363 | // This is the first time we have seen NAME/VERSION. | |
a3ad94ed | 364 | gold_assert(ins.first->second == NULL); |
ead1e424 ILT |
365 | |
366 | was_undefined = false; | |
367 | was_common = false; | |
368 | ||
14bfc3f5 ILT |
369 | if (def && !insdef.second) |
370 | { | |
14b31740 ILT |
371 | // We already have an entry for NAME/NULL. If we override |
372 | // it, then change it to NAME/VERSION. | |
593f47df ILT |
373 | ret = this->get_sized_symbol SELECT_SIZE_NAME(size) ( |
374 | insdef.first->second | |
375 | SELECT_SIZE(size)); | |
14b31740 | 376 | Symbol_table::resolve(ret, sym, object, version); |
14bfc3f5 ILT |
377 | ins.first->second = ret; |
378 | } | |
379 | else | |
380 | { | |
f6ce93d6 ILT |
381 | Sized_target<size, big_endian>* target = |
382 | object->sized_target SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
383 | SELECT_SIZE_ENDIAN_ONLY(size, big_endian)); | |
1564db8d ILT |
384 | if (!target->has_make_symbol()) |
385 | ret = new Sized_symbol<size>(); | |
386 | else | |
14bfc3f5 | 387 | { |
1564db8d ILT |
388 | ret = target->make_symbol(); |
389 | if (ret == NULL) | |
14bfc3f5 ILT |
390 | { |
391 | // This means that we don't want a symbol table | |
392 | // entry after all. | |
393 | if (!def) | |
394 | this->table_.erase(ins.first); | |
395 | else | |
396 | { | |
397 | this->table_.erase(insdef.first); | |
398 | // Inserting insdef invalidated ins. | |
f0641a0b ILT |
399 | this->table_.erase(std::make_pair(name_key, |
400 | version_key)); | |
14bfc3f5 ILT |
401 | } |
402 | return NULL; | |
403 | } | |
404 | } | |
14bfc3f5 | 405 | |
1564db8d ILT |
406 | ret->init(name, version, object, sym); |
407 | ||
14bfc3f5 ILT |
408 | ins.first->second = ret; |
409 | if (def) | |
410 | { | |
411 | // This is the first time we have seen NAME/NULL. Point | |
412 | // it at the new entry for NAME/VERSION. | |
a3ad94ed | 413 | gold_assert(insdef.second); |
14bfc3f5 ILT |
414 | insdef.first->second = ret; |
415 | } | |
416 | } | |
417 | } | |
418 | ||
ead1e424 ILT |
419 | // Record every time we see a new undefined symbol, to speed up |
420 | // archive groups. | |
421 | if (!was_undefined && ret->is_undefined()) | |
422 | ++this->saw_undefined_; | |
423 | ||
424 | // Keep track of common symbols, to speed up common symbol | |
425 | // allocation. | |
426 | if (!was_common && ret->is_common()) | |
427 | this->commons_.push_back(ret); | |
428 | ||
14bfc3f5 ILT |
429 | return ret; |
430 | } | |
431 | ||
f6ce93d6 | 432 | // Add all the symbols in a relocatable object to the hash table. |
14bfc3f5 ILT |
433 | |
434 | template<int size, bool big_endian> | |
435 | void | |
dbe717ef ILT |
436 | Symbol_table::add_from_relobj( |
437 | Sized_relobj<size, big_endian>* relobj, | |
f6ce93d6 | 438 | const unsigned char* syms, |
14bfc3f5 ILT |
439 | size_t count, |
440 | const char* sym_names, | |
441 | size_t sym_name_size, | |
442 | Symbol** sympointers) | |
443 | { | |
444 | // We take the size from the first object we see. | |
445 | if (this->get_size() == 0) | |
446 | this->set_size(size); | |
447 | ||
dbe717ef | 448 | if (size != this->get_size() || size != relobj->target()->get_size()) |
14bfc3f5 ILT |
449 | { |
450 | fprintf(stderr, _("%s: %s: mixing 32-bit and 64-bit ELF objects\n"), | |
dbe717ef | 451 | program_name, relobj->name().c_str()); |
14bfc3f5 ILT |
452 | gold_exit(false); |
453 | } | |
454 | ||
a783673b ILT |
455 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
456 | ||
f6ce93d6 | 457 | const unsigned char* p = syms; |
a783673b | 458 | for (size_t i = 0; i < count; ++i, p += sym_size) |
14bfc3f5 ILT |
459 | { |
460 | elfcpp::Sym<size, big_endian> sym(p); | |
a783673b | 461 | elfcpp::Sym<size, big_endian>* psym = &sym; |
14bfc3f5 | 462 | |
a783673b | 463 | unsigned int st_name = psym->get_st_name(); |
14bfc3f5 ILT |
464 | if (st_name >= sym_name_size) |
465 | { | |
54dc6425 ILT |
466 | fprintf(stderr, |
467 | _("%s: %s: bad global symbol name offset %u at %lu\n"), | |
dbe717ef | 468 | program_name, relobj->name().c_str(), st_name, |
14bfc3f5 ILT |
469 | static_cast<unsigned long>(i)); |
470 | gold_exit(false); | |
471 | } | |
472 | ||
dbe717ef ILT |
473 | const char* name = sym_names + st_name; |
474 | ||
a783673b ILT |
475 | // A symbol defined in a section which we are not including must |
476 | // be treated as an undefined symbol. | |
477 | unsigned char symbuf[sym_size]; | |
478 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
479 | unsigned int st_shndx = psym->get_st_shndx(); | |
480 | if (st_shndx != elfcpp::SHN_UNDEF | |
481 | && st_shndx < elfcpp::SHN_LORESERVE | |
dbe717ef | 482 | && !relobj->is_section_included(st_shndx)) |
a783673b ILT |
483 | { |
484 | memcpy(symbuf, p, sym_size); | |
485 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
486 | sw.put_st_shndx(elfcpp::SHN_UNDEF); | |
487 | psym = &sym2; | |
488 | } | |
489 | ||
14bfc3f5 ILT |
490 | // In an object file, an '@' in the name separates the symbol |
491 | // name from the version name. If there are two '@' characters, | |
492 | // this is the default version. | |
493 | const char* ver = strchr(name, '@'); | |
494 | ||
495 | Symbol* res; | |
496 | if (ver == NULL) | |
497 | { | |
f0641a0b ILT |
498 | Stringpool::Key name_key; |
499 | name = this->namepool_.add(name, &name_key); | |
dbe717ef | 500 | res = this->add_from_object(relobj, name, name_key, NULL, 0, |
f0641a0b | 501 | false, *psym); |
14bfc3f5 ILT |
502 | } |
503 | else | |
504 | { | |
f0641a0b ILT |
505 | Stringpool::Key name_key; |
506 | name = this->namepool_.add(name, ver - name, &name_key); | |
507 | ||
14bfc3f5 ILT |
508 | bool def = false; |
509 | ++ver; | |
510 | if (*ver == '@') | |
511 | { | |
512 | def = true; | |
513 | ++ver; | |
514 | } | |
f0641a0b ILT |
515 | |
516 | Stringpool::Key ver_key; | |
517 | ver = this->namepool_.add(ver, &ver_key); | |
518 | ||
dbe717ef | 519 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
f0641a0b | 520 | def, *psym); |
14bfc3f5 ILT |
521 | } |
522 | ||
523 | *sympointers++ = res; | |
14bfc3f5 ILT |
524 | } |
525 | } | |
526 | ||
dbe717ef ILT |
527 | // Add all the symbols in a dynamic object to the hash table. |
528 | ||
529 | template<int size, bool big_endian> | |
530 | void | |
531 | Symbol_table::add_from_dynobj( | |
532 | Sized_dynobj<size, big_endian>* dynobj, | |
533 | const unsigned char* syms, | |
534 | size_t count, | |
535 | const char* sym_names, | |
536 | size_t sym_name_size, | |
537 | const unsigned char* versym, | |
538 | size_t versym_size, | |
539 | const std::vector<const char*>* version_map) | |
540 | { | |
541 | // We take the size from the first object we see. | |
542 | if (this->get_size() == 0) | |
543 | this->set_size(size); | |
544 | ||
545 | if (size != this->get_size() || size != dynobj->target()->get_size()) | |
546 | { | |
547 | fprintf(stderr, _("%s: %s: mixing 32-bit and 64-bit ELF objects\n"), | |
548 | program_name, dynobj->name().c_str()); | |
549 | gold_exit(false); | |
550 | } | |
551 | ||
552 | if (versym != NULL && versym_size / 2 < count) | |
553 | { | |
554 | fprintf(stderr, _("%s: %s: too few symbol versions\n"), | |
555 | program_name, dynobj->name().c_str()); | |
556 | gold_exit(false); | |
557 | } | |
558 | ||
559 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
560 | ||
561 | const unsigned char* p = syms; | |
562 | const unsigned char* vs = versym; | |
563 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) | |
564 | { | |
565 | elfcpp::Sym<size, big_endian> sym(p); | |
566 | ||
567 | // Ignore symbols with local binding. | |
568 | if (sym.get_st_bind() == elfcpp::STB_LOCAL) | |
569 | continue; | |
570 | ||
571 | unsigned int st_name = sym.get_st_name(); | |
572 | if (st_name >= sym_name_size) | |
573 | { | |
574 | fprintf(stderr, _("%s: %s: bad symbol name offset %u at %lu\n"), | |
575 | program_name, dynobj->name().c_str(), st_name, | |
576 | static_cast<unsigned long>(i)); | |
577 | gold_exit(false); | |
578 | } | |
579 | ||
580 | const char* name = sym_names + st_name; | |
581 | ||
582 | if (versym == NULL) | |
583 | { | |
584 | Stringpool::Key name_key; | |
585 | name = this->namepool_.add(name, &name_key); | |
586 | this->add_from_object(dynobj, name, name_key, NULL, 0, | |
587 | false, sym); | |
588 | continue; | |
589 | } | |
590 | ||
591 | // Read the version information. | |
592 | ||
593 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); | |
594 | ||
595 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; | |
596 | v &= elfcpp::VERSYM_VERSION; | |
597 | ||
598 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)) | |
599 | { | |
600 | // This symbol should not be visible outside the object. | |
601 | continue; | |
602 | } | |
603 | ||
604 | // At this point we are definitely going to add this symbol. | |
605 | Stringpool::Key name_key; | |
606 | name = this->namepool_.add(name, &name_key); | |
607 | ||
608 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) | |
609 | { | |
610 | // This symbol does not have a version. | |
611 | this->add_from_object(dynobj, name, name_key, NULL, 0, false, sym); | |
612 | continue; | |
613 | } | |
614 | ||
615 | if (v >= version_map->size()) | |
616 | { | |
617 | fprintf(stderr, | |
618 | _("%s: %s: versym for symbol %zu out of range: %u\n"), | |
619 | program_name, dynobj->name().c_str(), i, v); | |
620 | gold_exit(false); | |
621 | } | |
622 | ||
623 | const char* version = (*version_map)[v]; | |
624 | if (version == NULL) | |
625 | { | |
626 | fprintf(stderr, _("%s: %s: versym for symbol %zu has no name: %u\n"), | |
627 | program_name, dynobj->name().c_str(), i, v); | |
628 | gold_exit(false); | |
629 | } | |
630 | ||
631 | Stringpool::Key version_key; | |
632 | version = this->namepool_.add(version, &version_key); | |
633 | ||
634 | // If this is an absolute symbol, and the version name and | |
635 | // symbol name are the same, then this is the version definition | |
636 | // symbol. These symbols exist to support using -u to pull in | |
637 | // particular versions. We do not want to record a version for | |
638 | // them. | |
639 | if (sym.get_st_shndx() == elfcpp::SHN_ABS && name_key == version_key) | |
640 | { | |
641 | this->add_from_object(dynobj, name, name_key, NULL, 0, false, sym); | |
642 | continue; | |
643 | } | |
644 | ||
645 | const bool def = !hidden && sym.get_st_shndx() != elfcpp::SHN_UNDEF; | |
646 | ||
647 | this->add_from_object(dynobj, name, name_key, version, version_key, | |
648 | def, sym); | |
649 | } | |
650 | } | |
651 | ||
ead1e424 ILT |
652 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
653 | // true, then only create the symbol if there is a reference to it. | |
654 | ||
655 | template<int size, bool big_endian> | |
656 | Sized_symbol<size>* | |
14b31740 ILT |
657 | Symbol_table::define_special_symbol(const Target* target, const char* name, |
658 | const char* version, bool only_if_ref | |
593f47df | 659 | ACCEPT_SIZE_ENDIAN) |
ead1e424 | 660 | { |
a3ad94ed | 661 | gold_assert(this->size_ == size); |
ead1e424 ILT |
662 | |
663 | Symbol* oldsym; | |
664 | Sized_symbol<size>* sym; | |
665 | ||
666 | if (only_if_ref) | |
667 | { | |
14b31740 | 668 | oldsym = this->lookup(name, version); |
f6ce93d6 | 669 | if (oldsym == NULL || !oldsym->is_undefined()) |
ead1e424 ILT |
670 | return NULL; |
671 | sym = NULL; | |
672 | ||
14b31740 | 673 | // Canonicalize NAME and VERSION. |
ead1e424 | 674 | name = oldsym->name(); |
14b31740 | 675 | version = oldsym->version(); |
ead1e424 ILT |
676 | } |
677 | else | |
678 | { | |
14b31740 | 679 | // Canonicalize NAME and VERSION. |
f0641a0b ILT |
680 | Stringpool::Key name_key; |
681 | name = this->namepool_.add(name, &name_key); | |
ead1e424 | 682 | |
14b31740 ILT |
683 | Stringpool::Key version_key = 0; |
684 | if (version != NULL) | |
685 | version = this->namepool_.add(version, &version_key); | |
686 | ||
ead1e424 | 687 | Symbol* const snull = NULL; |
ead1e424 | 688 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
14b31740 ILT |
689 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
690 | version_key), | |
ead1e424 ILT |
691 | snull)); |
692 | ||
693 | if (!ins.second) | |
694 | { | |
14b31740 | 695 | // We already have a symbol table entry for NAME/VERSION. |
ead1e424 | 696 | oldsym = ins.first->second; |
a3ad94ed | 697 | gold_assert(oldsym != NULL); |
ead1e424 ILT |
698 | sym = NULL; |
699 | } | |
700 | else | |
701 | { | |
702 | // We haven't seen this symbol before. | |
a3ad94ed | 703 | gold_assert(ins.first->second == NULL); |
ead1e424 ILT |
704 | |
705 | if (!target->has_make_symbol()) | |
706 | sym = new Sized_symbol<size>(); | |
707 | else | |
708 | { | |
a3ad94ed ILT |
709 | gold_assert(target->get_size() == size); |
710 | gold_assert(target->is_big_endian() ? big_endian : !big_endian); | |
ead1e424 | 711 | typedef Sized_target<size, big_endian> My_target; |
14b31740 ILT |
712 | const My_target* sized_target = |
713 | static_cast<const My_target*>(target); | |
ead1e424 ILT |
714 | sym = sized_target->make_symbol(); |
715 | if (sym == NULL) | |
716 | return NULL; | |
717 | } | |
718 | ||
719 | ins.first->second = sym; | |
720 | oldsym = NULL; | |
721 | } | |
722 | } | |
723 | ||
724 | if (oldsym != NULL) | |
725 | { | |
a3ad94ed | 726 | gold_assert(sym == NULL); |
ead1e424 | 727 | |
593f47df ILT |
728 | sym = this->get_sized_symbol SELECT_SIZE_NAME(size) (oldsym |
729 | SELECT_SIZE(size)); | |
a3ad94ed | 730 | gold_assert(sym->source() == Symbol::FROM_OBJECT); |
16649710 ILT |
731 | const int old_shndx = sym->shndx(); |
732 | if (old_shndx != elfcpp::SHN_UNDEF | |
733 | && old_shndx != elfcpp::SHN_COMMON | |
ead1e424 ILT |
734 | && !sym->object()->is_dynamic()) |
735 | { | |
736 | fprintf(stderr, "%s: linker defined: multiple definition of %s\n", | |
737 | program_name, name); | |
738 | // FIXME: Report old location. Record that we have seen an | |
739 | // error. | |
740 | return NULL; | |
741 | } | |
742 | ||
743 | // Our new definition is going to override the old reference. | |
744 | } | |
745 | ||
746 | return sym; | |
747 | } | |
748 | ||
749 | // Define a symbol based on an Output_data. | |
750 | ||
14b31740 ILT |
751 | Symbol* |
752 | Symbol_table::define_in_output_data(const Target* target, const char* name, | |
753 | const char* version, Output_data* od, | |
ead1e424 ILT |
754 | uint64_t value, uint64_t symsize, |
755 | elfcpp::STT type, elfcpp::STB binding, | |
756 | elfcpp::STV visibility, | |
757 | unsigned char nonvis, | |
758 | bool offset_is_from_end, | |
759 | bool only_if_ref) | |
760 | { | |
a3ad94ed | 761 | gold_assert(target->get_size() == this->size_); |
ead1e424 | 762 | if (this->size_ == 32) |
14b31740 ILT |
763 | return this->do_define_in_output_data<32>(target, name, version, od, value, |
764 | symsize, type, binding, | |
765 | visibility, nonvis, | |
766 | offset_is_from_end, only_if_ref); | |
ead1e424 | 767 | else if (this->size_ == 64) |
14b31740 ILT |
768 | return this->do_define_in_output_data<64>(target, name, version, od, value, |
769 | symsize, type, binding, | |
770 | visibility, nonvis, | |
771 | offset_is_from_end, only_if_ref); | |
ead1e424 | 772 | else |
a3ad94ed | 773 | gold_unreachable(); |
ead1e424 ILT |
774 | } |
775 | ||
776 | // Define a symbol in an Output_data, sized version. | |
777 | ||
778 | template<int size> | |
14b31740 | 779 | Sized_symbol<size>* |
ead1e424 | 780 | Symbol_table::do_define_in_output_data( |
14b31740 | 781 | const Target* target, |
ead1e424 | 782 | const char* name, |
14b31740 | 783 | const char* version, |
ead1e424 ILT |
784 | Output_data* od, |
785 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
786 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
787 | elfcpp::STT type, | |
788 | elfcpp::STB binding, | |
789 | elfcpp::STV visibility, | |
790 | unsigned char nonvis, | |
791 | bool offset_is_from_end, | |
792 | bool only_if_ref) | |
793 | { | |
794 | Sized_symbol<size>* sym; | |
795 | ||
796 | if (target->is_big_endian()) | |
593f47df | 797 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( |
14b31740 | 798 | target, name, version, only_if_ref |
593f47df | 799 | SELECT_SIZE_ENDIAN(size, true)); |
ead1e424 | 800 | else |
593f47df | 801 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( |
14b31740 | 802 | target, name, version, only_if_ref |
593f47df | 803 | SELECT_SIZE_ENDIAN(size, false)); |
ead1e424 ILT |
804 | |
805 | if (sym == NULL) | |
14b31740 | 806 | return NULL; |
ead1e424 ILT |
807 | |
808 | sym->init(name, od, value, symsize, type, binding, visibility, nonvis, | |
809 | offset_is_from_end); | |
14b31740 ILT |
810 | |
811 | return sym; | |
ead1e424 ILT |
812 | } |
813 | ||
814 | // Define a symbol based on an Output_segment. | |
815 | ||
14b31740 ILT |
816 | Symbol* |
817 | Symbol_table::define_in_output_segment(const Target* target, const char* name, | |
818 | const char* version, Output_segment* os, | |
ead1e424 ILT |
819 | uint64_t value, uint64_t symsize, |
820 | elfcpp::STT type, elfcpp::STB binding, | |
821 | elfcpp::STV visibility, | |
822 | unsigned char nonvis, | |
823 | Symbol::Segment_offset_base offset_base, | |
824 | bool only_if_ref) | |
825 | { | |
a3ad94ed | 826 | gold_assert(target->get_size() == this->size_); |
ead1e424 | 827 | if (this->size_ == 32) |
14b31740 ILT |
828 | return this->do_define_in_output_segment<32>(target, name, version, os, |
829 | value, symsize, type, binding, | |
830 | visibility, nonvis, | |
831 | offset_base, only_if_ref); | |
ead1e424 | 832 | else if (this->size_ == 64) |
14b31740 ILT |
833 | return this->do_define_in_output_segment<64>(target, name, version, os, |
834 | value, symsize, type, binding, | |
835 | visibility, nonvis, | |
836 | offset_base, only_if_ref); | |
ead1e424 | 837 | else |
a3ad94ed | 838 | gold_unreachable(); |
ead1e424 ILT |
839 | } |
840 | ||
841 | // Define a symbol in an Output_segment, sized version. | |
842 | ||
843 | template<int size> | |
14b31740 | 844 | Sized_symbol<size>* |
ead1e424 | 845 | Symbol_table::do_define_in_output_segment( |
14b31740 | 846 | const Target* target, |
ead1e424 | 847 | const char* name, |
14b31740 | 848 | const char* version, |
ead1e424 ILT |
849 | Output_segment* os, |
850 | typename elfcpp::Elf_types<size>::Elf_Addr value, | |
851 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
852 | elfcpp::STT type, | |
853 | elfcpp::STB binding, | |
854 | elfcpp::STV visibility, | |
855 | unsigned char nonvis, | |
856 | Symbol::Segment_offset_base offset_base, | |
857 | bool only_if_ref) | |
858 | { | |
859 | Sized_symbol<size>* sym; | |
860 | ||
861 | if (target->is_big_endian()) | |
593f47df | 862 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( |
14b31740 | 863 | target, name, version, only_if_ref |
593f47df | 864 | SELECT_SIZE_ENDIAN(size, true)); |
ead1e424 | 865 | else |
593f47df | 866 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( |
14b31740 | 867 | target, name, version, only_if_ref |
593f47df | 868 | SELECT_SIZE_ENDIAN(size, false)); |
ead1e424 ILT |
869 | |
870 | if (sym == NULL) | |
14b31740 | 871 | return NULL; |
ead1e424 ILT |
872 | |
873 | sym->init(name, os, value, symsize, type, binding, visibility, nonvis, | |
874 | offset_base); | |
14b31740 ILT |
875 | |
876 | return sym; | |
ead1e424 ILT |
877 | } |
878 | ||
879 | // Define a special symbol with a constant value. It is a multiple | |
880 | // definition error if this symbol is already defined. | |
881 | ||
14b31740 ILT |
882 | Symbol* |
883 | Symbol_table::define_as_constant(const Target* target, const char* name, | |
884 | const char* version, uint64_t value, | |
885 | uint64_t symsize, elfcpp::STT type, | |
886 | elfcpp::STB binding, elfcpp::STV visibility, | |
887 | unsigned char nonvis, bool only_if_ref) | |
ead1e424 | 888 | { |
a3ad94ed | 889 | gold_assert(target->get_size() == this->size_); |
ead1e424 | 890 | if (this->size_ == 32) |
14b31740 ILT |
891 | return this->do_define_as_constant<32>(target, name, version, value, |
892 | symsize, type, binding, visibility, | |
893 | nonvis, only_if_ref); | |
ead1e424 | 894 | else if (this->size_ == 64) |
14b31740 ILT |
895 | return this->do_define_as_constant<64>(target, name, version, value, |
896 | symsize, type, binding, visibility, | |
897 | nonvis, only_if_ref); | |
ead1e424 | 898 | else |
a3ad94ed | 899 | gold_unreachable(); |
ead1e424 ILT |
900 | } |
901 | ||
902 | // Define a symbol as a constant, sized version. | |
903 | ||
904 | template<int size> | |
14b31740 | 905 | Sized_symbol<size>* |
ead1e424 | 906 | Symbol_table::do_define_as_constant( |
14b31740 | 907 | const Target* target, |
ead1e424 | 908 | const char* name, |
14b31740 | 909 | const char* version, |
ead1e424 ILT |
910 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
911 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
912 | elfcpp::STT type, | |
913 | elfcpp::STB binding, | |
914 | elfcpp::STV visibility, | |
915 | unsigned char nonvis, | |
916 | bool only_if_ref) | |
917 | { | |
918 | Sized_symbol<size>* sym; | |
919 | ||
920 | if (target->is_big_endian()) | |
593f47df | 921 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) ( |
14b31740 | 922 | target, name, version, only_if_ref |
593f47df | 923 | SELECT_SIZE_ENDIAN(size, true)); |
ead1e424 | 924 | else |
593f47df | 925 | sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) ( |
14b31740 | 926 | target, name, version, only_if_ref |
593f47df | 927 | SELECT_SIZE_ENDIAN(size, false)); |
ead1e424 ILT |
928 | |
929 | if (sym == NULL) | |
14b31740 | 930 | return NULL; |
ead1e424 ILT |
931 | |
932 | sym->init(name, value, symsize, type, binding, visibility, nonvis); | |
14b31740 ILT |
933 | |
934 | return sym; | |
ead1e424 ILT |
935 | } |
936 | ||
937 | // Define a set of symbols in output sections. | |
938 | ||
939 | void | |
14b31740 ILT |
940 | Symbol_table::define_symbols(const Layout* layout, const Target* target, |
941 | int count, const Define_symbol_in_section* p) | |
ead1e424 ILT |
942 | { |
943 | for (int i = 0; i < count; ++i, ++p) | |
944 | { | |
945 | Output_section* os = layout->find_output_section(p->output_section); | |
946 | if (os != NULL) | |
14b31740 ILT |
947 | this->define_in_output_data(target, p->name, NULL, os, p->value, |
948 | p->size, p->type, p->binding, | |
949 | p->visibility, p->nonvis, | |
950 | p->offset_is_from_end, p->only_if_ref); | |
ead1e424 | 951 | else |
14b31740 | 952 | this->define_as_constant(target, p->name, NULL, 0, p->size, p->type, |
ead1e424 ILT |
953 | p->binding, p->visibility, p->nonvis, |
954 | p->only_if_ref); | |
955 | } | |
956 | } | |
957 | ||
958 | // Define a set of symbols in output segments. | |
959 | ||
960 | void | |
14b31740 ILT |
961 | Symbol_table::define_symbols(const Layout* layout, const Target* target, |
962 | int count, const Define_symbol_in_segment* p) | |
ead1e424 ILT |
963 | { |
964 | for (int i = 0; i < count; ++i, ++p) | |
965 | { | |
966 | Output_segment* os = layout->find_output_segment(p->segment_type, | |
967 | p->segment_flags_set, | |
968 | p->segment_flags_clear); | |
969 | if (os != NULL) | |
14b31740 ILT |
970 | this->define_in_output_segment(target, p->name, NULL, os, p->value, |
971 | p->size, p->type, p->binding, | |
972 | p->visibility, p->nonvis, | |
973 | p->offset_base, p->only_if_ref); | |
ead1e424 | 974 | else |
14b31740 | 975 | this->define_as_constant(target, p->name, NULL, 0, p->size, p->type, |
ead1e424 ILT |
976 | p->binding, p->visibility, p->nonvis, |
977 | p->only_if_ref); | |
978 | } | |
979 | } | |
980 | ||
a3ad94ed ILT |
981 | // Set the dynamic symbol indexes. INDEX is the index of the first |
982 | // global dynamic symbol. Pointers to the symbols are stored into the | |
983 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
984 | // updated dynamic symbol index. | |
985 | ||
986 | unsigned int | |
14b31740 ILT |
987 | Symbol_table::set_dynsym_indexes(const General_options* options, |
988 | const Target* target, | |
989 | unsigned int index, | |
a3ad94ed | 990 | std::vector<Symbol*>* syms, |
14b31740 ILT |
991 | Stringpool* dynpool, |
992 | Versions* versions) | |
a3ad94ed ILT |
993 | { |
994 | for (Symbol_table_type::iterator p = this->table_.begin(); | |
995 | p != this->table_.end(); | |
996 | ++p) | |
997 | { | |
998 | Symbol* sym = p->second; | |
16649710 ILT |
999 | |
1000 | // Note that SYM may already have a dynamic symbol index, since | |
1001 | // some symbols appear more than once in the symbol table, with | |
1002 | // and without a version. | |
1003 | ||
1004 | if (!sym->needs_dynsym_entry()) | |
1005 | sym->set_dynsym_index(-1U); | |
1006 | else if (!sym->has_dynsym_index()) | |
a3ad94ed ILT |
1007 | { |
1008 | sym->set_dynsym_index(index); | |
1009 | ++index; | |
1010 | syms->push_back(sym); | |
1011 | dynpool->add(sym->name(), NULL); | |
14b31740 ILT |
1012 | |
1013 | // Record any version information. | |
1014 | if (sym->version() != NULL) | |
1015 | versions->record_version(options, dynpool, sym); | |
a3ad94ed ILT |
1016 | } |
1017 | } | |
1018 | ||
14b31740 ILT |
1019 | // Finish up the versions. In some cases this may add new dynamic |
1020 | // symbols. | |
1021 | index = versions->finalize(target, this, index, syms); | |
1022 | ||
a3ad94ed ILT |
1023 | return index; |
1024 | } | |
1025 | ||
c06b7b0b ILT |
1026 | // Set the final values for all the symbols. The index of the first |
1027 | // global symbol in the output file is INDEX. Record the file offset | |
75f65a3e | 1028 | // OFF. Add their names to POOL. Return the new file offset. |
54dc6425 | 1029 | |
75f65a3e | 1030 | off_t |
16649710 ILT |
1031 | Symbol_table::finalize(unsigned int index, off_t off, off_t dynoff, |
1032 | size_t dyn_global_index, size_t dyncount, | |
1033 | Stringpool* pool) | |
54dc6425 | 1034 | { |
f6ce93d6 ILT |
1035 | off_t ret; |
1036 | ||
a3ad94ed | 1037 | gold_assert(index != 0); |
c06b7b0b ILT |
1038 | this->first_global_index_ = index; |
1039 | ||
16649710 ILT |
1040 | this->dynamic_offset_ = dynoff; |
1041 | this->first_dynamic_global_index_ = dyn_global_index; | |
1042 | this->dynamic_count_ = dyncount; | |
1043 | ||
75f65a3e | 1044 | if (this->size_ == 32) |
c06b7b0b | 1045 | ret = this->sized_finalize<32>(index, off, pool); |
61ba1cf9 | 1046 | else if (this->size_ == 64) |
c06b7b0b | 1047 | ret = this->sized_finalize<64>(index, off, pool); |
61ba1cf9 | 1048 | else |
a3ad94ed | 1049 | gold_unreachable(); |
f6ce93d6 ILT |
1050 | |
1051 | // Now that we have the final symbol table, we can reliably note | |
1052 | // which symbols should get warnings. | |
1053 | this->warnings_.note_warnings(this); | |
1054 | ||
1055 | return ret; | |
75f65a3e ILT |
1056 | } |
1057 | ||
ead1e424 ILT |
1058 | // Set the final value for all the symbols. This is called after |
1059 | // Layout::finalize, so all the output sections have their final | |
1060 | // address. | |
75f65a3e ILT |
1061 | |
1062 | template<int size> | |
1063 | off_t | |
c06b7b0b | 1064 | Symbol_table::sized_finalize(unsigned index, off_t off, Stringpool* pool) |
75f65a3e | 1065 | { |
ead1e424 | 1066 | off = align_address(off, size >> 3); |
75f65a3e ILT |
1067 | this->offset_ = off; |
1068 | ||
c06b7b0b ILT |
1069 | size_t orig_index = index; |
1070 | ||
75f65a3e | 1071 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
c06b7b0b ILT |
1072 | for (Symbol_table_type::iterator p = this->table_.begin(); |
1073 | p != this->table_.end(); | |
1074 | ++p) | |
54dc6425 | 1075 | { |
75f65a3e | 1076 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); |
54dc6425 | 1077 | |
75f65a3e | 1078 | // FIXME: Here we need to decide which symbols should go into |
a3ad94ed ILT |
1079 | // the output file, based on --strip. |
1080 | ||
1081 | // The default version of a symbol may appear twice in the | |
1082 | // symbol table. We only need to finalize it once. | |
1083 | if (sym->has_symtab_index()) | |
1084 | continue; | |
75f65a3e | 1085 | |
008db82e ILT |
1086 | if (!sym->in_reg()) |
1087 | { | |
1088 | gold_assert(!sym->has_symtab_index()); | |
1089 | sym->set_symtab_index(-1U); | |
1090 | gold_assert(sym->dynsym_index() == -1U); | |
1091 | continue; | |
1092 | } | |
1093 | ||
ead1e424 | 1094 | typename Sized_symbol<size>::Value_type value; |
75f65a3e | 1095 | |
ead1e424 | 1096 | switch (sym->source()) |
75f65a3e | 1097 | { |
ead1e424 ILT |
1098 | case Symbol::FROM_OBJECT: |
1099 | { | |
16649710 | 1100 | unsigned int shndx = sym->shndx(); |
ead1e424 ILT |
1101 | |
1102 | // FIXME: We need some target specific support here. | |
16649710 ILT |
1103 | if (shndx >= elfcpp::SHN_LORESERVE |
1104 | && shndx != elfcpp::SHN_ABS) | |
ead1e424 ILT |
1105 | { |
1106 | fprintf(stderr, _("%s: %s: unsupported symbol section 0x%x\n"), | |
16649710 | 1107 | program_name, sym->name(), shndx); |
ead1e424 ILT |
1108 | gold_exit(false); |
1109 | } | |
1110 | ||
f6ce93d6 ILT |
1111 | Object* symobj = sym->object(); |
1112 | if (symobj->is_dynamic()) | |
1113 | { | |
1114 | value = 0; | |
16649710 | 1115 | shndx = elfcpp::SHN_UNDEF; |
f6ce93d6 | 1116 | } |
16649710 | 1117 | else if (shndx == elfcpp::SHN_UNDEF) |
ead1e424 | 1118 | value = 0; |
16649710 | 1119 | else if (shndx == elfcpp::SHN_ABS) |
ead1e424 ILT |
1120 | value = sym->value(); |
1121 | else | |
1122 | { | |
f6ce93d6 | 1123 | Relobj* relobj = static_cast<Relobj*>(symobj); |
ead1e424 | 1124 | off_t secoff; |
16649710 | 1125 | Output_section* os = relobj->output_section(shndx, &secoff); |
ead1e424 ILT |
1126 | |
1127 | if (os == NULL) | |
1128 | { | |
c06b7b0b | 1129 | sym->set_symtab_index(-1U); |
16649710 | 1130 | gold_assert(sym->dynsym_index() == -1U); |
ead1e424 ILT |
1131 | continue; |
1132 | } | |
1133 | ||
1134 | value = sym->value() + os->address() + secoff; | |
1135 | } | |
1136 | } | |
1137 | break; | |
1138 | ||
1139 | case Symbol::IN_OUTPUT_DATA: | |
1140 | { | |
1141 | Output_data* od = sym->output_data(); | |
1142 | value = sym->value() + od->address(); | |
1143 | if (sym->offset_is_from_end()) | |
1144 | value += od->data_size(); | |
1145 | } | |
1146 | break; | |
1147 | ||
1148 | case Symbol::IN_OUTPUT_SEGMENT: | |
1149 | { | |
1150 | Output_segment* os = sym->output_segment(); | |
1151 | value = sym->value() + os->vaddr(); | |
1152 | switch (sym->offset_base()) | |
1153 | { | |
1154 | case Symbol::SEGMENT_START: | |
1155 | break; | |
1156 | case Symbol::SEGMENT_END: | |
1157 | value += os->memsz(); | |
1158 | break; | |
1159 | case Symbol::SEGMENT_BSS: | |
1160 | value += os->filesz(); | |
1161 | break; | |
1162 | default: | |
a3ad94ed | 1163 | gold_unreachable(); |
ead1e424 ILT |
1164 | } |
1165 | } | |
1166 | break; | |
1167 | ||
1168 | case Symbol::CONSTANT: | |
1169 | value = sym->value(); | |
1170 | break; | |
1171 | ||
1172 | default: | |
a3ad94ed | 1173 | gold_unreachable(); |
54dc6425 | 1174 | } |
ead1e424 ILT |
1175 | |
1176 | sym->set_value(value); | |
c06b7b0b | 1177 | sym->set_symtab_index(index); |
f0641a0b | 1178 | pool->add(sym->name(), NULL); |
c06b7b0b | 1179 | ++index; |
ead1e424 | 1180 | off += sym_size; |
54dc6425 | 1181 | } |
75f65a3e | 1182 | |
c06b7b0b | 1183 | this->output_count_ = index - orig_index; |
61ba1cf9 | 1184 | |
75f65a3e | 1185 | return off; |
54dc6425 ILT |
1186 | } |
1187 | ||
61ba1cf9 ILT |
1188 | // Write out the global symbols. |
1189 | ||
1190 | void | |
1191 | Symbol_table::write_globals(const Target* target, const Stringpool* sympool, | |
16649710 | 1192 | const Stringpool* dynpool, Output_file* of) const |
61ba1cf9 ILT |
1193 | { |
1194 | if (this->size_ == 32) | |
1195 | { | |
1196 | if (target->is_big_endian()) | |
16649710 | 1197 | this->sized_write_globals<32, true>(target, sympool, dynpool, of); |
61ba1cf9 | 1198 | else |
16649710 | 1199 | this->sized_write_globals<32, false>(target, sympool, dynpool, of); |
61ba1cf9 ILT |
1200 | } |
1201 | else if (this->size_ == 64) | |
1202 | { | |
1203 | if (target->is_big_endian()) | |
16649710 | 1204 | this->sized_write_globals<64, true>(target, sympool, dynpool, of); |
61ba1cf9 | 1205 | else |
16649710 | 1206 | this->sized_write_globals<64, false>(target, sympool, dynpool, of); |
61ba1cf9 ILT |
1207 | } |
1208 | else | |
a3ad94ed | 1209 | gold_unreachable(); |
61ba1cf9 ILT |
1210 | } |
1211 | ||
1212 | // Write out the global symbols. | |
1213 | ||
1214 | template<int size, bool big_endian> | |
1215 | void | |
1216 | Symbol_table::sized_write_globals(const Target*, | |
1217 | const Stringpool* sympool, | |
16649710 | 1218 | const Stringpool* dynpool, |
61ba1cf9 ILT |
1219 | Output_file* of) const |
1220 | { | |
1221 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
c06b7b0b ILT |
1222 | unsigned int index = this->first_global_index_; |
1223 | const off_t oview_size = this->output_count_ * sym_size; | |
16649710 ILT |
1224 | unsigned char* const psyms = of->get_output_view(this->offset_, oview_size); |
1225 | ||
1226 | unsigned int dynamic_count = this->dynamic_count_; | |
1227 | off_t dynamic_size = dynamic_count * sym_size; | |
1228 | unsigned int first_dynamic_global_index = this->first_dynamic_global_index_; | |
1229 | unsigned char* dynamic_view; | |
1230 | if (this->dynamic_offset_ == 0) | |
1231 | dynamic_view = NULL; | |
1232 | else | |
1233 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); | |
c06b7b0b | 1234 | |
61ba1cf9 ILT |
1235 | unsigned char* ps = psyms; |
1236 | for (Symbol_table_type::const_iterator p = this->table_.begin(); | |
1237 | p != this->table_.end(); | |
1238 | ++p) | |
1239 | { | |
1240 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); | |
1241 | ||
a3ad94ed | 1242 | unsigned int sym_index = sym->symtab_index(); |
16649710 ILT |
1243 | unsigned int dynsym_index; |
1244 | if (dynamic_view == NULL) | |
1245 | dynsym_index = -1U; | |
1246 | else | |
1247 | dynsym_index = sym->dynsym_index(); | |
1248 | ||
1249 | if (sym_index == -1U && dynsym_index == -1U) | |
a3ad94ed ILT |
1250 | { |
1251 | // This symbol is not included in the output file. | |
1252 | continue; | |
1253 | } | |
16649710 ILT |
1254 | |
1255 | if (sym_index == index) | |
1256 | ++index; | |
1257 | else if (sym_index != -1U) | |
a3ad94ed ILT |
1258 | { |
1259 | // We have already seen this symbol, because it has a | |
1260 | // default version. | |
1261 | gold_assert(sym_index < index); | |
16649710 ILT |
1262 | if (dynsym_index == -1U) |
1263 | continue; | |
1264 | sym_index = -1U; | |
a3ad94ed | 1265 | } |
c06b7b0b | 1266 | |
ead1e424 ILT |
1267 | unsigned int shndx; |
1268 | switch (sym->source()) | |
1269 | { | |
1270 | case Symbol::FROM_OBJECT: | |
1271 | { | |
16649710 | 1272 | unsigned int in_shndx = sym->shndx(); |
ead1e424 ILT |
1273 | |
1274 | // FIXME: We need some target specific support here. | |
16649710 ILT |
1275 | if (in_shndx >= elfcpp::SHN_LORESERVE |
1276 | && in_shndx != elfcpp::SHN_ABS) | |
ead1e424 ILT |
1277 | { |
1278 | fprintf(stderr, _("%s: %s: unsupported symbol section 0x%x\n"), | |
16649710 | 1279 | program_name, sym->name(), in_shndx); |
ead1e424 ILT |
1280 | gold_exit(false); |
1281 | } | |
1282 | ||
f6ce93d6 ILT |
1283 | Object* symobj = sym->object(); |
1284 | if (symobj->is_dynamic()) | |
1285 | { | |
1286 | // FIXME. | |
1287 | shndx = elfcpp::SHN_UNDEF; | |
1288 | } | |
16649710 ILT |
1289 | else if (in_shndx == elfcpp::SHN_UNDEF |
1290 | || in_shndx == elfcpp::SHN_ABS) | |
1291 | shndx = in_shndx; | |
ead1e424 ILT |
1292 | else |
1293 | { | |
f6ce93d6 | 1294 | Relobj* relobj = static_cast<Relobj*>(symobj); |
ead1e424 | 1295 | off_t secoff; |
16649710 | 1296 | Output_section* os = relobj->output_section(in_shndx, &secoff); |
a3ad94ed | 1297 | gold_assert(os != NULL); |
ead1e424 ILT |
1298 | shndx = os->out_shndx(); |
1299 | } | |
1300 | } | |
1301 | break; | |
1302 | ||
1303 | case Symbol::IN_OUTPUT_DATA: | |
1304 | shndx = sym->output_data()->out_shndx(); | |
1305 | break; | |
1306 | ||
1307 | case Symbol::IN_OUTPUT_SEGMENT: | |
1308 | shndx = elfcpp::SHN_ABS; | |
1309 | break; | |
1310 | ||
1311 | case Symbol::CONSTANT: | |
1312 | shndx = elfcpp::SHN_ABS; | |
1313 | break; | |
1314 | ||
1315 | default: | |
a3ad94ed | 1316 | gold_unreachable(); |
ead1e424 | 1317 | } |
61ba1cf9 | 1318 | |
16649710 ILT |
1319 | if (sym_index != -1U) |
1320 | { | |
6a469986 ILT |
1321 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
1322 | sym, shndx, sympool, ps | |
1323 | SELECT_SIZE_ENDIAN(size, big_endian)); | |
16649710 ILT |
1324 | ps += sym_size; |
1325 | } | |
61ba1cf9 | 1326 | |
16649710 ILT |
1327 | if (dynsym_index != -1U) |
1328 | { | |
1329 | dynsym_index -= first_dynamic_global_index; | |
1330 | gold_assert(dynsym_index < dynamic_count); | |
1331 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
6a469986 ILT |
1332 | this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
1333 | sym, shndx, dynpool, pd | |
1334 | SELECT_SIZE_ENDIAN(size, big_endian)); | |
16649710 | 1335 | } |
61ba1cf9 ILT |
1336 | } |
1337 | ||
a3ad94ed | 1338 | gold_assert(ps - psyms == oview_size); |
c06b7b0b ILT |
1339 | |
1340 | of->write_output_view(this->offset_, oview_size, psyms); | |
16649710 ILT |
1341 | if (dynamic_view != NULL) |
1342 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); | |
1343 | } | |
1344 | ||
1345 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the | |
1346 | // strtab holding the name. | |
1347 | ||
1348 | template<int size, bool big_endian> | |
1349 | void | |
1350 | Symbol_table::sized_write_symbol(Sized_symbol<size>* sym, | |
1351 | unsigned int shndx, | |
1352 | const Stringpool* pool, | |
6a469986 ILT |
1353 | unsigned char* p |
1354 | ACCEPT_SIZE_ENDIAN) const | |
16649710 ILT |
1355 | { |
1356 | elfcpp::Sym_write<size, big_endian> osym(p); | |
1357 | osym.put_st_name(pool->get_offset(sym->name())); | |
1358 | osym.put_st_value(sym->value()); | |
1359 | osym.put_st_size(sym->symsize()); | |
1360 | osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type())); | |
1361 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); | |
1362 | osym.put_st_shndx(shndx); | |
61ba1cf9 ILT |
1363 | } |
1364 | ||
a3ad94ed ILT |
1365 | // Write out a section symbol. Return the update offset. |
1366 | ||
1367 | void | |
1368 | Symbol_table::write_section_symbol(const Target* target, | |
1369 | const Output_section *os, | |
1370 | Output_file* of, | |
1371 | off_t offset) const | |
1372 | { | |
1373 | if (this->size_ == 32) | |
1374 | { | |
1375 | if (target->is_big_endian()) | |
1376 | this->sized_write_section_symbol<32, true>(os, of, offset); | |
1377 | else | |
1378 | this->sized_write_section_symbol<32, false>(os, of, offset); | |
1379 | } | |
1380 | else if (this->size_ == 64) | |
1381 | { | |
1382 | if (target->is_big_endian()) | |
1383 | this->sized_write_section_symbol<64, true>(os, of, offset); | |
1384 | else | |
1385 | this->sized_write_section_symbol<64, false>(os, of, offset); | |
1386 | } | |
1387 | else | |
1388 | gold_unreachable(); | |
1389 | } | |
1390 | ||
1391 | // Write out a section symbol, specialized for size and endianness. | |
1392 | ||
1393 | template<int size, bool big_endian> | |
1394 | void | |
1395 | Symbol_table::sized_write_section_symbol(const Output_section* os, | |
1396 | Output_file* of, | |
1397 | off_t offset) const | |
1398 | { | |
1399 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1400 | ||
1401 | unsigned char* pov = of->get_output_view(offset, sym_size); | |
1402 | ||
1403 | elfcpp::Sym_write<size, big_endian> osym(pov); | |
1404 | osym.put_st_name(0); | |
1405 | osym.put_st_value(os->address()); | |
1406 | osym.put_st_size(0); | |
1407 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, | |
1408 | elfcpp::STT_SECTION)); | |
1409 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); | |
1410 | osym.put_st_shndx(os->out_shndx()); | |
1411 | ||
1412 | of->write_output_view(offset, sym_size, pov); | |
1413 | } | |
1414 | ||
f6ce93d6 ILT |
1415 | // Warnings functions. |
1416 | ||
1417 | // Add a new warning. | |
1418 | ||
1419 | void | |
1420 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, | |
1421 | unsigned int shndx) | |
1422 | { | |
1423 | name = symtab->canonicalize_name(name); | |
1424 | this->warnings_[name].set(obj, shndx); | |
1425 | } | |
1426 | ||
1427 | // Look through the warnings and mark the symbols for which we should | |
1428 | // warn. This is called during Layout::finalize when we know the | |
1429 | // sources for all the symbols. | |
1430 | ||
1431 | void | |
1432 | Warnings::note_warnings(Symbol_table* symtab) | |
1433 | { | |
1434 | for (Warning_table::iterator p = this->warnings_.begin(); | |
1435 | p != this->warnings_.end(); | |
1436 | ++p) | |
1437 | { | |
1438 | Symbol* sym = symtab->lookup(p->first, NULL); | |
1439 | if (sym != NULL | |
1440 | && sym->source() == Symbol::FROM_OBJECT | |
1441 | && sym->object() == p->second.object) | |
1442 | { | |
1443 | sym->set_has_warning(); | |
1444 | ||
1445 | // Read the section contents to get the warning text. It | |
1446 | // would be nicer if we only did this if we have to actually | |
1447 | // issue a warning. Unfortunately, warnings are issued as | |
1448 | // we relocate sections. That means that we can not lock | |
1449 | // the object then, as we might try to issue the same | |
1450 | // warning multiple times simultaneously. | |
645f8123 ILT |
1451 | { |
1452 | Task_locker_obj<Object> tl(*p->second.object); | |
1453 | const unsigned char* c; | |
1454 | off_t len; | |
1455 | c = p->second.object->section_contents(p->second.shndx, &len); | |
1456 | p->second.set_text(reinterpret_cast<const char*>(c), len); | |
1457 | } | |
f6ce93d6 ILT |
1458 | } |
1459 | } | |
1460 | } | |
1461 | ||
1462 | // Issue a warning. This is called when we see a relocation against a | |
1463 | // symbol for which has a warning. | |
1464 | ||
1465 | void | |
c06b7b0b | 1466 | Warnings::issue_warning(const Symbol* sym, const std::string& location) const |
f6ce93d6 | 1467 | { |
a3ad94ed | 1468 | gold_assert(sym->has_warning()); |
f6ce93d6 | 1469 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
a3ad94ed | 1470 | gold_assert(p != this->warnings_.end()); |
f6ce93d6 ILT |
1471 | fprintf(stderr, _("%s: %s: warning: %s\n"), program_name, location.c_str(), |
1472 | p->second.text.c_str()); | |
1473 | } | |
1474 | ||
14bfc3f5 ILT |
1475 | // Instantiate the templates we need. We could use the configure |
1476 | // script to restrict this to only the ones needed for implemented | |
1477 | // targets. | |
1478 | ||
1479 | template | |
1480 | void | |
dbe717ef ILT |
1481 | Symbol_table::add_from_relobj<32, true>( |
1482 | Sized_relobj<32, true>* relobj, | |
f6ce93d6 | 1483 | const unsigned char* syms, |
14bfc3f5 ILT |
1484 | size_t count, |
1485 | const char* sym_names, | |
1486 | size_t sym_name_size, | |
1487 | Symbol** sympointers); | |
1488 | ||
1489 | template | |
1490 | void | |
dbe717ef ILT |
1491 | Symbol_table::add_from_relobj<32, false>( |
1492 | Sized_relobj<32, false>* relobj, | |
f6ce93d6 | 1493 | const unsigned char* syms, |
14bfc3f5 ILT |
1494 | size_t count, |
1495 | const char* sym_names, | |
1496 | size_t sym_name_size, | |
1497 | Symbol** sympointers); | |
1498 | ||
1499 | template | |
1500 | void | |
dbe717ef ILT |
1501 | Symbol_table::add_from_relobj<64, true>( |
1502 | Sized_relobj<64, true>* relobj, | |
f6ce93d6 | 1503 | const unsigned char* syms, |
14bfc3f5 ILT |
1504 | size_t count, |
1505 | const char* sym_names, | |
1506 | size_t sym_name_size, | |
1507 | Symbol** sympointers); | |
1508 | ||
1509 | template | |
1510 | void | |
dbe717ef ILT |
1511 | Symbol_table::add_from_relobj<64, false>( |
1512 | Sized_relobj<64, false>* relobj, | |
f6ce93d6 | 1513 | const unsigned char* syms, |
14bfc3f5 ILT |
1514 | size_t count, |
1515 | const char* sym_names, | |
1516 | size_t sym_name_size, | |
1517 | Symbol** sympointers); | |
1518 | ||
dbe717ef ILT |
1519 | template |
1520 | void | |
1521 | Symbol_table::add_from_dynobj<32, true>( | |
1522 | Sized_dynobj<32, true>* dynobj, | |
1523 | const unsigned char* syms, | |
1524 | size_t count, | |
1525 | const char* sym_names, | |
1526 | size_t sym_name_size, | |
1527 | const unsigned char* versym, | |
1528 | size_t versym_size, | |
1529 | const std::vector<const char*>* version_map); | |
1530 | ||
1531 | template | |
1532 | void | |
1533 | Symbol_table::add_from_dynobj<32, false>( | |
1534 | Sized_dynobj<32, false>* dynobj, | |
1535 | const unsigned char* syms, | |
1536 | size_t count, | |
1537 | const char* sym_names, | |
1538 | size_t sym_name_size, | |
1539 | const unsigned char* versym, | |
1540 | size_t versym_size, | |
1541 | const std::vector<const char*>* version_map); | |
1542 | ||
1543 | template | |
1544 | void | |
1545 | Symbol_table::add_from_dynobj<64, true>( | |
1546 | Sized_dynobj<64, true>* dynobj, | |
1547 | const unsigned char* syms, | |
1548 | size_t count, | |
1549 | const char* sym_names, | |
1550 | size_t sym_name_size, | |
1551 | const unsigned char* versym, | |
1552 | size_t versym_size, | |
1553 | const std::vector<const char*>* version_map); | |
1554 | ||
1555 | template | |
1556 | void | |
1557 | Symbol_table::add_from_dynobj<64, false>( | |
1558 | Sized_dynobj<64, false>* dynobj, | |
1559 | const unsigned char* syms, | |
1560 | size_t count, | |
1561 | const char* sym_names, | |
1562 | size_t sym_name_size, | |
1563 | const unsigned char* versym, | |
1564 | size_t versym_size, | |
1565 | const std::vector<const char*>* version_map); | |
1566 | ||
14bfc3f5 | 1567 | } // End namespace gold. |