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14bfc3f5 ILT |
1 | // symtab.cc -- the gold symbol table |
2 | ||
6f2750fe | 3 | // Copyright (C) 2006-2016 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 | ||
04bf7072 | 25 | #include <cstring> |
14bfc3f5 | 26 | #include <stdint.h> |
04bf7072 | 27 | #include <algorithm> |
70e654ba | 28 | #include <set> |
14bfc3f5 ILT |
29 | #include <string> |
30 | #include <utility> | |
a2b1aa12 | 31 | #include "demangle.h" |
14bfc3f5 | 32 | |
6d03d481 | 33 | #include "gc.h" |
14bfc3f5 | 34 | #include "object.h" |
70e654ba | 35 | #include "dwarf_reader.h" |
dbe717ef | 36 | #include "dynobj.h" |
75f65a3e | 37 | #include "output.h" |
61ba1cf9 | 38 | #include "target.h" |
645f8123 | 39 | #include "workqueue.h" |
14bfc3f5 | 40 | #include "symtab.h" |
88a4108b | 41 | #include "script.h" |
89fc3421 | 42 | #include "plugin.h" |
cdc29364 | 43 | #include "incremental.h" |
14bfc3f5 ILT |
44 | |
45 | namespace gold | |
46 | { | |
47 | ||
48 | // Class Symbol. | |
49 | ||
ead1e424 ILT |
50 | // Initialize fields in Symbol. This initializes everything except u_ |
51 | // and source_. | |
14bfc3f5 | 52 | |
14bfc3f5 | 53 | void |
2ea97941 ILT |
54 | Symbol::init_fields(const char* name, const char* version, |
55 | elfcpp::STT type, elfcpp::STB binding, | |
56 | elfcpp::STV visibility, unsigned char nonvis) | |
14bfc3f5 | 57 | { |
2ea97941 ILT |
58 | this->name_ = name; |
59 | this->version_ = version; | |
c06b7b0b ILT |
60 | this->symtab_index_ = 0; |
61 | this->dynsym_index_ = 0; | |
0a65a3a7 | 62 | this->got_offsets_.init(); |
880cd20d | 63 | this->plt_offset_ = -1U; |
2ea97941 ILT |
64 | this->type_ = type; |
65 | this->binding_ = binding; | |
66 | this->visibility_ = visibility; | |
67 | this->nonvis_ = nonvis; | |
1564db8d ILT |
68 | this->is_def_ = false; |
69 | this->is_forwarder_ = false; | |
aeddab66 | 70 | this->has_alias_ = false; |
c06b7b0b | 71 | this->needs_dynsym_entry_ = false; |
008db82e | 72 | this->in_reg_ = false; |
ead1e424 | 73 | this->in_dyn_ = false; |
f6ce93d6 | 74 | this->has_warning_ = false; |
46fe1623 | 75 | this->is_copied_from_dynobj_ = false; |
55a93433 | 76 | this->is_forced_local_ = false; |
d491d34e | 77 | this->is_ordinary_shndx_ = false; |
89fc3421 | 78 | this->in_real_elf_ = false; |
880cd20d | 79 | this->is_defined_in_discarded_section_ = false; |
ce279a62 CC |
80 | this->undef_binding_set_ = false; |
81 | this->undef_binding_weak_ = false; | |
5146f448 | 82 | this->is_predefined_ = false; |
6eeb0170 | 83 | this->is_protected_ = false; |
ead1e424 ILT |
84 | } |
85 | ||
a2b1aa12 ILT |
86 | // Return the demangled version of the symbol's name, but only |
87 | // if the --demangle flag was set. | |
88 | ||
89 | static std::string | |
2ea97941 | 90 | demangle(const char* name) |
a2b1aa12 | 91 | { |
086a1841 | 92 | if (!parameters->options().do_demangle()) |
2ea97941 | 93 | return name; |
ff541f30 | 94 | |
a2b1aa12 ILT |
95 | // cplus_demangle allocates memory for the result it returns, |
96 | // and returns NULL if the name is already demangled. | |
2ea97941 | 97 | char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS); |
a2b1aa12 | 98 | if (demangled_name == NULL) |
2ea97941 | 99 | return name; |
a2b1aa12 ILT |
100 | |
101 | std::string retval(demangled_name); | |
102 | free(demangled_name); | |
103 | return retval; | |
104 | } | |
105 | ||
106 | std::string | |
107 | Symbol::demangled_name() const | |
108 | { | |
ff541f30 | 109 | return demangle(this->name()); |
a2b1aa12 ILT |
110 | } |
111 | ||
ead1e424 ILT |
112 | // Initialize the fields in the base class Symbol for SYM in OBJECT. |
113 | ||
114 | template<int size, bool big_endian> | |
115 | void | |
2ea97941 | 116 | Symbol::init_base_object(const char* name, const char* version, Object* object, |
f3e9c5c5 ILT |
117 | const elfcpp::Sym<size, big_endian>& sym, |
118 | unsigned int st_shndx, bool is_ordinary) | |
ead1e424 | 119 | { |
2ea97941 | 120 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), |
ead1e424 | 121 | sym.get_st_visibility(), sym.get_st_nonvis()); |
2ea97941 | 122 | this->u_.from_object.object = object; |
d491d34e ILT |
123 | this->u_.from_object.shndx = st_shndx; |
124 | this->is_ordinary_shndx_ = is_ordinary; | |
ead1e424 | 125 | this->source_ = FROM_OBJECT; |
2ea97941 ILT |
126 | this->in_reg_ = !object->is_dynamic(); |
127 | this->in_dyn_ = object->is_dynamic(); | |
128 | this->in_real_elf_ = object->pluginobj() == NULL; | |
14bfc3f5 ILT |
129 | } |
130 | ||
ead1e424 ILT |
131 | // Initialize the fields in the base class Symbol for a symbol defined |
132 | // in an Output_data. | |
133 | ||
134 | void | |
2ea97941 ILT |
135 | Symbol::init_base_output_data(const char* name, const char* version, |
136 | Output_data* od, elfcpp::STT type, | |
137 | elfcpp::STB binding, elfcpp::STV visibility, | |
5146f448 CC |
138 | unsigned char nonvis, bool offset_is_from_end, |
139 | bool is_predefined) | |
ead1e424 | 140 | { |
2ea97941 | 141 | this->init_fields(name, version, type, binding, visibility, nonvis); |
ead1e424 | 142 | this->u_.in_output_data.output_data = od; |
2ea97941 | 143 | this->u_.in_output_data.offset_is_from_end = offset_is_from_end; |
ead1e424 | 144 | this->source_ = IN_OUTPUT_DATA; |
008db82e | 145 | this->in_reg_ = true; |
89fc3421 | 146 | this->in_real_elf_ = true; |
5146f448 | 147 | this->is_predefined_ = is_predefined; |
ead1e424 ILT |
148 | } |
149 | ||
150 | // Initialize the fields in the base class Symbol for a symbol defined | |
151 | // in an Output_segment. | |
152 | ||
153 | void | |
2ea97941 ILT |
154 | Symbol::init_base_output_segment(const char* name, const char* version, |
155 | Output_segment* os, elfcpp::STT type, | |
156 | elfcpp::STB binding, elfcpp::STV visibility, | |
157 | unsigned char nonvis, | |
5146f448 CC |
158 | Segment_offset_base offset_base, |
159 | bool is_predefined) | |
ead1e424 | 160 | { |
2ea97941 | 161 | this->init_fields(name, version, type, binding, visibility, nonvis); |
ead1e424 | 162 | this->u_.in_output_segment.output_segment = os; |
2ea97941 | 163 | this->u_.in_output_segment.offset_base = offset_base; |
ead1e424 | 164 | this->source_ = IN_OUTPUT_SEGMENT; |
008db82e | 165 | this->in_reg_ = true; |
89fc3421 | 166 | this->in_real_elf_ = true; |
5146f448 | 167 | this->is_predefined_ = is_predefined; |
ead1e424 ILT |
168 | } |
169 | ||
170 | // Initialize the fields in the base class Symbol for a symbol defined | |
171 | // as a constant. | |
172 | ||
173 | void | |
2ea97941 ILT |
174 | Symbol::init_base_constant(const char* name, const char* version, |
175 | elfcpp::STT type, elfcpp::STB binding, | |
5146f448 CC |
176 | elfcpp::STV visibility, unsigned char nonvis, |
177 | bool is_predefined) | |
f3e9c5c5 | 178 | { |
2ea97941 | 179 | this->init_fields(name, version, type, binding, visibility, nonvis); |
f3e9c5c5 ILT |
180 | this->source_ = IS_CONSTANT; |
181 | this->in_reg_ = true; | |
89fc3421 | 182 | this->in_real_elf_ = true; |
5146f448 | 183 | this->is_predefined_ = is_predefined; |
f3e9c5c5 ILT |
184 | } |
185 | ||
186 | // Initialize the fields in the base class Symbol for an undefined | |
187 | // symbol. | |
188 | ||
189 | void | |
2ea97941 ILT |
190 | Symbol::init_base_undefined(const char* name, const char* version, |
191 | elfcpp::STT type, elfcpp::STB binding, | |
192 | elfcpp::STV visibility, unsigned char nonvis) | |
ead1e424 | 193 | { |
2ea97941 | 194 | this->init_fields(name, version, type, binding, visibility, nonvis); |
d7ab2a47 | 195 | this->dynsym_index_ = -1U; |
f3e9c5c5 | 196 | this->source_ = IS_UNDEFINED; |
008db82e | 197 | this->in_reg_ = true; |
89fc3421 | 198 | this->in_real_elf_ = true; |
ead1e424 ILT |
199 | } |
200 | ||
c7912668 ILT |
201 | // Allocate a common symbol in the base. |
202 | ||
203 | void | |
204 | Symbol::allocate_base_common(Output_data* od) | |
205 | { | |
206 | gold_assert(this->is_common()); | |
207 | this->source_ = IN_OUTPUT_DATA; | |
208 | this->u_.in_output_data.output_data = od; | |
209 | this->u_.in_output_data.offset_is_from_end = false; | |
210 | } | |
211 | ||
ead1e424 | 212 | // Initialize the fields in Sized_symbol for SYM in OBJECT. |
14bfc3f5 ILT |
213 | |
214 | template<int size> | |
215 | template<bool big_endian> | |
216 | void | |
2ea97941 ILT |
217 | Sized_symbol<size>::init_object(const char* name, const char* version, |
218 | Object* object, | |
f3e9c5c5 ILT |
219 | const elfcpp::Sym<size, big_endian>& sym, |
220 | unsigned int st_shndx, bool is_ordinary) | |
14bfc3f5 | 221 | { |
2ea97941 | 222 | this->init_base_object(name, version, object, sym, st_shndx, is_ordinary); |
14bfc3f5 | 223 | this->value_ = sym.get_st_value(); |
ead1e424 ILT |
224 | this->symsize_ = sym.get_st_size(); |
225 | } | |
226 | ||
227 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
228 | // Output_data. | |
229 | ||
230 | template<int size> | |
231 | void | |
2ea97941 ILT |
232 | Sized_symbol<size>::init_output_data(const char* name, const char* version, |
233 | Output_data* od, Value_type value, | |
234 | Size_type symsize, elfcpp::STT type, | |
235 | elfcpp::STB binding, | |
236 | elfcpp::STV visibility, | |
237 | unsigned char nonvis, | |
5146f448 CC |
238 | bool offset_is_from_end, |
239 | bool is_predefined) | |
ead1e424 | 240 | { |
2ea97941 | 241 | this->init_base_output_data(name, version, od, type, binding, visibility, |
5146f448 | 242 | nonvis, offset_is_from_end, is_predefined); |
2ea97941 ILT |
243 | this->value_ = value; |
244 | this->symsize_ = symsize; | |
ead1e424 ILT |
245 | } |
246 | ||
247 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
248 | // Output_segment. | |
249 | ||
250 | template<int size> | |
251 | void | |
2ea97941 ILT |
252 | Sized_symbol<size>::init_output_segment(const char* name, const char* version, |
253 | Output_segment* os, Value_type value, | |
254 | Size_type symsize, elfcpp::STT type, | |
255 | elfcpp::STB binding, | |
256 | elfcpp::STV visibility, | |
257 | unsigned char nonvis, | |
5146f448 CC |
258 | Segment_offset_base offset_base, |
259 | bool is_predefined) | |
ead1e424 | 260 | { |
2ea97941 | 261 | this->init_base_output_segment(name, version, os, type, binding, visibility, |
5146f448 | 262 | nonvis, offset_base, is_predefined); |
2ea97941 ILT |
263 | this->value_ = value; |
264 | this->symsize_ = symsize; | |
ead1e424 ILT |
265 | } |
266 | ||
267 | // Initialize the fields in Sized_symbol for a symbol defined as a | |
268 | // constant. | |
269 | ||
270 | template<int size> | |
271 | void | |
2ea97941 ILT |
272 | Sized_symbol<size>::init_constant(const char* name, const char* version, |
273 | Value_type value, Size_type symsize, | |
274 | elfcpp::STT type, elfcpp::STB binding, | |
5146f448 CC |
275 | elfcpp::STV visibility, unsigned char nonvis, |
276 | bool is_predefined) | |
ead1e424 | 277 | { |
5146f448 CC |
278 | this->init_base_constant(name, version, type, binding, visibility, nonvis, |
279 | is_predefined); | |
2ea97941 ILT |
280 | this->value_ = value; |
281 | this->symsize_ = symsize; | |
14bfc3f5 ILT |
282 | } |
283 | ||
f3e9c5c5 ILT |
284 | // Initialize the fields in Sized_symbol for an undefined symbol. |
285 | ||
286 | template<int size> | |
287 | void | |
2ea97941 | 288 | Sized_symbol<size>::init_undefined(const char* name, const char* version, |
dc1c8a16 CC |
289 | Value_type value, elfcpp::STT type, |
290 | elfcpp::STB binding, elfcpp::STV visibility, | |
291 | unsigned char nonvis) | |
f3e9c5c5 | 292 | { |
2ea97941 | 293 | this->init_base_undefined(name, version, type, binding, visibility, nonvis); |
dc1c8a16 | 294 | this->value_ = value; |
f3e9c5c5 ILT |
295 | this->symsize_ = 0; |
296 | } | |
297 | ||
6d1c4efb ILT |
298 | // Return an allocated string holding the symbol's name as |
299 | // name@version. This is used for relocatable links. | |
300 | ||
301 | std::string | |
302 | Symbol::versioned_name() const | |
303 | { | |
304 | gold_assert(this->version_ != NULL); | |
305 | std::string ret = this->name_; | |
306 | ret.push_back('@'); | |
307 | if (this->is_def_) | |
308 | ret.push_back('@'); | |
309 | ret += this->version_; | |
310 | return ret; | |
311 | } | |
312 | ||
8a5e3e08 ILT |
313 | // Return true if SHNDX represents a common symbol. |
314 | ||
315 | bool | |
2ea97941 | 316 | Symbol::is_common_shndx(unsigned int shndx) |
8a5e3e08 | 317 | { |
2ea97941 ILT |
318 | return (shndx == elfcpp::SHN_COMMON |
319 | || shndx == parameters->target().small_common_shndx() | |
320 | || shndx == parameters->target().large_common_shndx()); | |
8a5e3e08 ILT |
321 | } |
322 | ||
c7912668 ILT |
323 | // Allocate a common symbol. |
324 | ||
325 | template<int size> | |
326 | void | |
2ea97941 | 327 | Sized_symbol<size>::allocate_common(Output_data* od, Value_type value) |
c7912668 ILT |
328 | { |
329 | this->allocate_base_common(od); | |
2ea97941 | 330 | this->value_ = value; |
c7912668 ILT |
331 | } |
332 | ||
c82fbeee CS |
333 | // The ""'s around str ensure str is a string literal, so sizeof works. |
334 | #define strprefix(var, str) (strncmp(var, str, sizeof("" str "") - 1) == 0) | |
335 | ||
436ca963 ILT |
336 | // Return true if this symbol should be added to the dynamic symbol |
337 | // table. | |
338 | ||
7b549045 | 339 | bool |
ce97fa81 | 340 | Symbol::should_add_dynsym_entry(Symbol_table* symtab) const |
436ca963 | 341 | { |
badc8139 RÁE |
342 | // If the symbol is only present on plugin files, the plugin decided we |
343 | // don't need it. | |
344 | if (!this->in_real_elf()) | |
345 | return false; | |
346 | ||
436ca963 ILT |
347 | // If the symbol is used by a dynamic relocation, we need to add it. |
348 | if (this->needs_dynsym_entry()) | |
349 | return true; | |
350 | ||
6d03d481 ST |
351 | // If this symbol's section is not added, the symbol need not be added. |
352 | // The section may have been GCed. Note that export_dynamic is being | |
353 | // overridden here. This should not be done for shared objects. | |
354 | if (parameters->options().gc_sections() | |
355 | && !parameters->options().shared() | |
356 | && this->source() == Symbol::FROM_OBJECT | |
357 | && !this->object()->is_dynamic()) | |
358 | { | |
359 | Relobj* relobj = static_cast<Relobj*>(this->object()); | |
360 | bool is_ordinary; | |
2ea97941 ILT |
361 | unsigned int shndx = this->shndx(&is_ordinary); |
362 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF | |
ce97fa81 ST |
363 | && !relobj->is_section_included(shndx) |
364 | && !symtab->is_section_folded(relobj, shndx)) | |
6d03d481 ST |
365 | return false; |
366 | } | |
367 | ||
31821be0 CC |
368 | // If the symbol was forced dynamic in a --dynamic-list file |
369 | // or an --export-dynamic-symbol option, add it. | |
b24fdbf5 CC |
370 | if (!this->is_from_dynobj() |
371 | && (parameters->options().in_dynamic_list(this->name()) | |
372 | || parameters->options().is_export_dynamic_symbol(this->name()))) | |
31821be0 CC |
373 | { |
374 | if (!this->is_forced_local()) | |
375 | return true; | |
376 | gold_warning(_("Cannot export local symbol '%s'"), | |
377 | this->demangled_name().c_str()); | |
378 | return false; | |
379 | } | |
380 | ||
55a93433 ILT |
381 | // If the symbol was forced local in a version script, do not add it. |
382 | if (this->is_forced_local()) | |
383 | return false; | |
384 | ||
c82fbeee CS |
385 | // If dynamic-list-data was specified, add any STT_OBJECT. |
386 | if (parameters->options().dynamic_list_data() | |
387 | && !this->is_from_dynobj() | |
388 | && this->type() == elfcpp::STT_OBJECT) | |
389 | return true; | |
390 | ||
391 | // If --dynamic-list-cpp-new was specified, add any new/delete symbol. | |
392 | // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols. | |
393 | if ((parameters->options().dynamic_list_cpp_new() | |
394 | || parameters->options().dynamic_list_cpp_typeinfo()) | |
395 | && !this->is_from_dynobj()) | |
396 | { | |
397 | // TODO(csilvers): We could probably figure out if we're an operator | |
398 | // new/delete or typeinfo without the need to demangle. | |
2ea97941 ILT |
399 | char* demangled_name = cplus_demangle(this->name(), |
400 | DMGL_ANSI | DMGL_PARAMS); | |
401 | if (demangled_name == NULL) | |
c82fbeee CS |
402 | { |
403 | // Not a C++ symbol, so it can't satisfy these flags | |
404 | } | |
405 | else if (parameters->options().dynamic_list_cpp_new() | |
2ea97941 ILT |
406 | && (strprefix(demangled_name, "operator new") |
407 | || strprefix(demangled_name, "operator delete"))) | |
c82fbeee | 408 | { |
2ea97941 | 409 | free(demangled_name); |
c82fbeee CS |
410 | return true; |
411 | } | |
412 | else if (parameters->options().dynamic_list_cpp_typeinfo() | |
2ea97941 ILT |
413 | && (strprefix(demangled_name, "typeinfo name for") |
414 | || strprefix(demangled_name, "typeinfo for"))) | |
c82fbeee | 415 | { |
2ea97941 | 416 | free(demangled_name); |
c82fbeee CS |
417 | return true; |
418 | } | |
419 | else | |
2ea97941 | 420 | free(demangled_name); |
c82fbeee CS |
421 | } |
422 | ||
436ca963 | 423 | // If exporting all symbols or building a shared library, |
4b889c30 | 424 | // or the symbol should be globally unique (GNU_UNIQUE), |
436ca963 ILT |
425 | // and the symbol is defined in a regular object and is |
426 | // externally visible, we need to add it. | |
4b889c30 IC |
427 | if ((parameters->options().export_dynamic() |
428 | || parameters->options().shared() | |
429 | || (parameters->options().gnu_unique() | |
430 | && this->binding() == elfcpp::STB_GNU_UNIQUE)) | |
436ca963 | 431 | && !this->is_from_dynobj() |
f3ae1b28 | 432 | && !this->is_undefined() |
436ca963 ILT |
433 | && this->is_externally_visible()) |
434 | return true; | |
435 | ||
436 | return false; | |
437 | } | |
438 | ||
b3b74ddc ILT |
439 | // Return true if the final value of this symbol is known at link |
440 | // time. | |
441 | ||
442 | bool | |
443 | Symbol::final_value_is_known() const | |
444 | { | |
445 | // If we are not generating an executable, then no final values are | |
a6a17750 CC |
446 | // known, since they will change at runtime, with the exception of |
447 | // TLS symbols in a position-independent executable. | |
448 | if ((parameters->options().output_is_position_independent() | |
449 | || parameters->options().relocatable()) | |
450 | && !(this->type() == elfcpp::STT_TLS | |
451 | && parameters->options().pie())) | |
b3b74ddc ILT |
452 | return false; |
453 | ||
f3e9c5c5 ILT |
454 | // If the symbol is not from an object file, and is not undefined, |
455 | // then it is defined, and known. | |
b3b74ddc | 456 | if (this->source_ != FROM_OBJECT) |
f3e9c5c5 ILT |
457 | { |
458 | if (this->source_ != IS_UNDEFINED) | |
459 | return true; | |
460 | } | |
461 | else | |
462 | { | |
463 | // If the symbol is from a dynamic object, then the final value | |
464 | // is not known. | |
465 | if (this->object()->is_dynamic()) | |
466 | return false; | |
b3b74ddc | 467 | |
f3e9c5c5 ILT |
468 | // If the symbol is not undefined (it is defined or common), |
469 | // then the final value is known. | |
470 | if (!this->is_undefined()) | |
471 | return true; | |
472 | } | |
b3b74ddc ILT |
473 | |
474 | // If the symbol is undefined, then whether the final value is known | |
475 | // depends on whether we are doing a static link. If we are doing a | |
476 | // dynamic link, then the final value could be filled in at runtime. | |
477 | // This could reasonably be the case for a weak undefined symbol. | |
478 | return parameters->doing_static_link(); | |
479 | } | |
480 | ||
77e65537 | 481 | // Return the output section where this symbol is defined. |
a445fddf | 482 | |
77e65537 ILT |
483 | Output_section* |
484 | Symbol::output_section() const | |
a445fddf ILT |
485 | { |
486 | switch (this->source_) | |
487 | { | |
488 | case FROM_OBJECT: | |
77e65537 | 489 | { |
2ea97941 ILT |
490 | unsigned int shndx = this->u_.from_object.shndx; |
491 | if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_) | |
77e65537 ILT |
492 | { |
493 | gold_assert(!this->u_.from_object.object->is_dynamic()); | |
89fc3421 | 494 | gold_assert(this->u_.from_object.object->pluginobj() == NULL); |
77e65537 | 495 | Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object); |
2ea97941 | 496 | return relobj->output_section(shndx); |
77e65537 ILT |
497 | } |
498 | return NULL; | |
499 | } | |
500 | ||
a445fddf | 501 | case IN_OUTPUT_DATA: |
77e65537 ILT |
502 | return this->u_.in_output_data.output_data->output_section(); |
503 | ||
a445fddf | 504 | case IN_OUTPUT_SEGMENT: |
f3e9c5c5 ILT |
505 | case IS_CONSTANT: |
506 | case IS_UNDEFINED: | |
77e65537 ILT |
507 | return NULL; |
508 | ||
509 | default: | |
510 | gold_unreachable(); | |
511 | } | |
512 | } | |
513 | ||
514 | // Set the symbol's output section. This is used for symbols defined | |
515 | // in scripts. This should only be called after the symbol table has | |
516 | // been finalized. | |
517 | ||
518 | void | |
519 | Symbol::set_output_section(Output_section* os) | |
520 | { | |
521 | switch (this->source_) | |
522 | { | |
523 | case FROM_OBJECT: | |
524 | case IN_OUTPUT_DATA: | |
525 | gold_assert(this->output_section() == os); | |
526 | break; | |
f3e9c5c5 | 527 | case IS_CONSTANT: |
77e65537 ILT |
528 | this->source_ = IN_OUTPUT_DATA; |
529 | this->u_.in_output_data.output_data = os; | |
530 | this->u_.in_output_data.offset_is_from_end = false; | |
531 | break; | |
532 | case IN_OUTPUT_SEGMENT: | |
f3e9c5c5 | 533 | case IS_UNDEFINED: |
a445fddf ILT |
534 | default: |
535 | gold_unreachable(); | |
536 | } | |
537 | } | |
538 | ||
d1bddd3c CC |
539 | // Set the symbol's output segment. This is used for pre-defined |
540 | // symbols whose segments aren't known until after layout is done | |
541 | // (e.g., __ehdr_start). | |
542 | ||
543 | void | |
544 | Symbol::set_output_segment(Output_segment* os, Segment_offset_base base) | |
545 | { | |
546 | gold_assert(this->is_predefined_); | |
547 | this->source_ = IN_OUTPUT_SEGMENT; | |
548 | this->u_.in_output_segment.output_segment = os; | |
549 | this->u_.in_output_segment.offset_base = base; | |
550 | } | |
551 | ||
552 | // Set the symbol to undefined. This is used for pre-defined | |
553 | // symbols whose segments aren't known until after layout is done | |
554 | // (e.g., __ehdr_start). | |
555 | ||
556 | void | |
557 | Symbol::set_undefined() | |
558 | { | |
d1bddd3c CC |
559 | this->source_ = IS_UNDEFINED; |
560 | this->is_predefined_ = false; | |
561 | } | |
562 | ||
14bfc3f5 ILT |
563 | // Class Symbol_table. |
564 | ||
09124467 | 565 | Symbol_table::Symbol_table(unsigned int count, |
2ea97941 | 566 | const Version_script_info& version_script) |
6d013333 | 567 | : saw_undefined_(0), offset_(0), table_(count), namepool_(), |
8a5e3e08 ILT |
568 | forwarders_(), commons_(), tls_commons_(), small_commons_(), |
569 | large_commons_(), forced_locals_(), warnings_(), | |
dc1c8a16 CC |
570 | version_script_(version_script), gc_(NULL), icf_(NULL), |
571 | target_symbols_() | |
14bfc3f5 | 572 | { |
6d013333 | 573 | namepool_.reserve(count); |
14bfc3f5 ILT |
574 | } |
575 | ||
576 | Symbol_table::~Symbol_table() | |
577 | { | |
578 | } | |
579 | ||
ad8f37d1 ILT |
580 | // The symbol table key equality function. This is called with |
581 | // Stringpool keys. | |
14bfc3f5 | 582 | |
ad8f37d1 | 583 | inline bool |
14bfc3f5 ILT |
584 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, |
585 | const Symbol_table_key& k2) const | |
586 | { | |
587 | return k1.first == k2.first && k1.second == k2.second; | |
588 | } | |
589 | ||
ef15dade | 590 | bool |
efc6fa12 | 591 | Symbol_table::is_section_folded(Relobj* obj, unsigned int shndx) const |
ef15dade | 592 | { |
032ce4e9 | 593 | return (parameters->options().icf_enabled() |
2ea97941 | 594 | && this->icf_->is_section_folded(obj, shndx)); |
ef15dade ST |
595 | } |
596 | ||
31821be0 CC |
597 | // For symbols that have been listed with a -u or --export-dynamic-symbol |
598 | // option, add them to the work list to avoid gc'ing them. | |
6d03d481 ST |
599 | |
600 | void | |
88a4108b | 601 | Symbol_table::gc_mark_undef_symbols(Layout* layout) |
6d03d481 ST |
602 | { |
603 | for (options::String_set::const_iterator p = | |
604 | parameters->options().undefined_begin(); | |
605 | p != parameters->options().undefined_end(); | |
606 | ++p) | |
607 | { | |
2ea97941 ILT |
608 | const char* name = p->c_str(); |
609 | Symbol* sym = this->lookup(name); | |
ca09d69a | 610 | gold_assert(sym != NULL); |
6d03d481 ST |
611 | if (sym->source() == Symbol::FROM_OBJECT |
612 | && !sym->object()->is_dynamic()) | |
613 | { | |
e81fea4d | 614 | this->gc_mark_symbol(sym); |
6d03d481 ST |
615 | } |
616 | } | |
88a4108b | 617 | |
31821be0 CC |
618 | for (options::String_set::const_iterator p = |
619 | parameters->options().export_dynamic_symbol_begin(); | |
620 | p != parameters->options().export_dynamic_symbol_end(); | |
621 | ++p) | |
622 | { | |
623 | const char* name = p->c_str(); | |
624 | Symbol* sym = this->lookup(name); | |
1d5dfe78 CC |
625 | // It's not an error if a symbol named by --export-dynamic-symbol |
626 | // is undefined. | |
627 | if (sym != NULL | |
628 | && sym->source() == Symbol::FROM_OBJECT | |
31821be0 CC |
629 | && !sym->object()->is_dynamic()) |
630 | { | |
e81fea4d | 631 | this->gc_mark_symbol(sym); |
31821be0 CC |
632 | } |
633 | } | |
634 | ||
88a4108b ILT |
635 | for (Script_options::referenced_const_iterator p = |
636 | layout->script_options()->referenced_begin(); | |
637 | p != layout->script_options()->referenced_end(); | |
638 | ++p) | |
639 | { | |
640 | Symbol* sym = this->lookup(p->c_str()); | |
641 | gold_assert(sym != NULL); | |
642 | if (sym->source() == Symbol::FROM_OBJECT | |
643 | && !sym->object()->is_dynamic()) | |
644 | { | |
e81fea4d | 645 | this->gc_mark_symbol(sym); |
88a4108b ILT |
646 | } |
647 | } | |
6d03d481 ST |
648 | } |
649 | ||
650 | void | |
7257cc92 | 651 | Symbol_table::gc_mark_symbol(Symbol* sym) |
6d03d481 | 652 | { |
7257cc92 | 653 | // Add the object and section to the work list. |
7257cc92 ST |
654 | bool is_ordinary; |
655 | unsigned int shndx = sym->shndx(&is_ordinary); | |
efc6fa12 | 656 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF && !sym->object()->is_dynamic()) |
6d03d481 | 657 | { |
7257cc92 | 658 | gold_assert(this->gc_!= NULL); |
efc6fa12 CC |
659 | Relobj* relobj = static_cast<Relobj*>(sym->object()); |
660 | this->gc_->worklist().push_back(Section_id(relobj, shndx)); | |
6d03d481 | 661 | } |
e81fea4d | 662 | parameters->target().gc_mark_symbol(this, sym); |
6d03d481 ST |
663 | } |
664 | ||
665 | // When doing garbage collection, keep symbols that have been seen in | |
666 | // dynamic objects. | |
667 | inline void | |
668 | Symbol_table::gc_mark_dyn_syms(Symbol* sym) | |
669 | { | |
670 | if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT | |
671 | && !sym->object()->is_dynamic()) | |
7257cc92 | 672 | this->gc_mark_symbol(sym); |
6d03d481 ST |
673 | } |
674 | ||
dd8670e5 | 675 | // Make TO a symbol which forwards to FROM. |
14bfc3f5 ILT |
676 | |
677 | void | |
678 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) | |
679 | { | |
a3ad94ed ILT |
680 | gold_assert(from != to); |
681 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); | |
14bfc3f5 ILT |
682 | this->forwarders_[from] = to; |
683 | from->set_forwarder(); | |
684 | } | |
685 | ||
61ba1cf9 ILT |
686 | // Resolve the forwards from FROM, returning the real symbol. |
687 | ||
14bfc3f5 | 688 | Symbol* |
c06b7b0b | 689 | Symbol_table::resolve_forwards(const Symbol* from) const |
14bfc3f5 | 690 | { |
a3ad94ed | 691 | gold_assert(from->is_forwarder()); |
c06b7b0b | 692 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
14bfc3f5 | 693 | this->forwarders_.find(from); |
a3ad94ed | 694 | gold_assert(p != this->forwarders_.end()); |
14bfc3f5 ILT |
695 | return p->second; |
696 | } | |
697 | ||
61ba1cf9 ILT |
698 | // Look up a symbol by name. |
699 | ||
700 | Symbol* | |
2ea97941 | 701 | Symbol_table::lookup(const char* name, const char* version) const |
61ba1cf9 | 702 | { |
f0641a0b | 703 | Stringpool::Key name_key; |
2ea97941 ILT |
704 | name = this->namepool_.find(name, &name_key); |
705 | if (name == NULL) | |
61ba1cf9 | 706 | return NULL; |
f0641a0b ILT |
707 | |
708 | Stringpool::Key version_key = 0; | |
2ea97941 | 709 | if (version != NULL) |
61ba1cf9 | 710 | { |
2ea97941 ILT |
711 | version = this->namepool_.find(version, &version_key); |
712 | if (version == NULL) | |
61ba1cf9 ILT |
713 | return NULL; |
714 | } | |
715 | ||
f0641a0b | 716 | Symbol_table_key key(name_key, version_key); |
61ba1cf9 ILT |
717 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
718 | if (p == this->table_.end()) | |
719 | return NULL; | |
720 | return p->second; | |
721 | } | |
722 | ||
14bfc3f5 ILT |
723 | // Resolve a Symbol with another Symbol. This is only used in the |
724 | // unusual case where there are references to both an unversioned | |
725 | // symbol and a symbol with a version, and we then discover that that | |
1564db8d ILT |
726 | // version is the default version. Because this is unusual, we do |
727 | // this the slow way, by converting back to an ELF symbol. | |
14bfc3f5 | 728 | |
1564db8d | 729 | template<int size, bool big_endian> |
14bfc3f5 | 730 | void |
95d14cd3 | 731 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from) |
14bfc3f5 | 732 | { |
1564db8d ILT |
733 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
734 | elfcpp::Sym_write<size, big_endian> esym(buf); | |
d491d34e | 735 | // We don't bother to set the st_name or the st_shndx field. |
1564db8d ILT |
736 | esym.put_st_value(from->value()); |
737 | esym.put_st_size(from->symsize()); | |
738 | esym.put_st_info(from->binding(), from->type()); | |
ead1e424 | 739 | esym.put_st_other(from->visibility(), from->nonvis()); |
d491d34e | 740 | bool is_ordinary; |
2ea97941 ILT |
741 | unsigned int shndx = from->shndx(&is_ordinary); |
742 | this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(), | |
b45e00b3 | 743 | from->version(), true); |
1ebd95fd ILT |
744 | if (from->in_reg()) |
745 | to->set_in_reg(); | |
746 | if (from->in_dyn()) | |
747 | to->set_in_dyn(); | |
6d03d481 ST |
748 | if (parameters->options().gc_sections()) |
749 | this->gc_mark_dyn_syms(to); | |
14bfc3f5 ILT |
750 | } |
751 | ||
0602e05a ILT |
752 | // Record that a symbol is forced to be local by a version script or |
753 | // by visibility. | |
55a93433 ILT |
754 | |
755 | void | |
756 | Symbol_table::force_local(Symbol* sym) | |
757 | { | |
758 | if (!sym->is_defined() && !sym->is_common()) | |
759 | return; | |
760 | if (sym->is_forced_local()) | |
761 | { | |
762 | // We already got this one. | |
763 | return; | |
764 | } | |
765 | sym->set_is_forced_local(); | |
766 | this->forced_locals_.push_back(sym); | |
767 | } | |
768 | ||
0864d551 ILT |
769 | // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This |
770 | // is only called for undefined symbols, when at least one --wrap | |
771 | // option was used. | |
772 | ||
773 | const char* | |
2ea97941 | 774 | Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key) |
0864d551 ILT |
775 | { |
776 | // For some targets, we need to ignore a specific character when | |
777 | // wrapping, and add it back later. | |
778 | char prefix = '\0'; | |
2ea97941 | 779 | if (name[0] == parameters->target().wrap_char()) |
0864d551 | 780 | { |
2ea97941 ILT |
781 | prefix = name[0]; |
782 | ++name; | |
0864d551 ILT |
783 | } |
784 | ||
2ea97941 | 785 | if (parameters->options().is_wrap(name)) |
0864d551 ILT |
786 | { |
787 | // Turn NAME into __wrap_NAME. | |
788 | std::string s; | |
789 | if (prefix != '\0') | |
790 | s += prefix; | |
791 | s += "__wrap_"; | |
2ea97941 | 792 | s += name; |
0864d551 ILT |
793 | |
794 | // This will give us both the old and new name in NAMEPOOL_, but | |
795 | // that is OK. Only the versions we need will wind up in the | |
796 | // real string table in the output file. | |
797 | return this->namepool_.add(s.c_str(), true, name_key); | |
798 | } | |
799 | ||
800 | const char* const real_prefix = "__real_"; | |
801 | const size_t real_prefix_length = strlen(real_prefix); | |
2ea97941 ILT |
802 | if (strncmp(name, real_prefix, real_prefix_length) == 0 |
803 | && parameters->options().is_wrap(name + real_prefix_length)) | |
0864d551 ILT |
804 | { |
805 | // Turn __real_NAME into NAME. | |
806 | std::string s; | |
807 | if (prefix != '\0') | |
808 | s += prefix; | |
2ea97941 | 809 | s += name + real_prefix_length; |
0864d551 ILT |
810 | return this->namepool_.add(s.c_str(), true, name_key); |
811 | } | |
812 | ||
2ea97941 | 813 | return name; |
0864d551 ILT |
814 | } |
815 | ||
8c500701 ILT |
816 | // This is called when we see a symbol NAME/VERSION, and the symbol |
817 | // already exists in the symbol table, and VERSION is marked as being | |
818 | // the default version. SYM is the NAME/VERSION symbol we just added. | |
819 | // DEFAULT_IS_NEW is true if this is the first time we have seen the | |
820 | // symbol NAME/NULL. PDEF points to the entry for NAME/NULL. | |
821 | ||
822 | template<int size, bool big_endian> | |
823 | void | |
824 | Symbol_table::define_default_version(Sized_symbol<size>* sym, | |
825 | bool default_is_new, | |
826 | Symbol_table_type::iterator pdef) | |
827 | { | |
828 | if (default_is_new) | |
829 | { | |
830 | // This is the first time we have seen NAME/NULL. Make | |
831 | // NAME/NULL point to NAME/VERSION, and mark SYM as the default | |
832 | // version. | |
833 | pdef->second = sym; | |
834 | sym->set_is_default(); | |
835 | } | |
836 | else if (pdef->second == sym) | |
837 | { | |
838 | // NAME/NULL already points to NAME/VERSION. Don't mark the | |
839 | // symbol as the default if it is not already the default. | |
840 | } | |
841 | else | |
842 | { | |
843 | // This is the unfortunate case where we already have entries | |
844 | // for both NAME/VERSION and NAME/NULL. We now see a symbol | |
845 | // NAME/VERSION where VERSION is the default version. We have | |
846 | // already resolved this new symbol with the existing | |
847 | // NAME/VERSION symbol. | |
848 | ||
849 | // It's possible that NAME/NULL and NAME/VERSION are both | |
850 | // defined in regular objects. This can only happen if one | |
851 | // object file defines foo and another defines foo@@ver. This | |
852 | // is somewhat obscure, but we call it a multiple definition | |
853 | // error. | |
854 | ||
855 | // It's possible that NAME/NULL actually has a version, in which | |
856 | // case it won't be the same as VERSION. This happens with | |
857 | // ver_test_7.so in the testsuite for the symbol t2_2. We see | |
858 | // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We | |
859 | // then see an unadorned t2_2 in an object file and give it | |
860 | // version VER1 from the version script. This looks like a | |
861 | // default definition for VER1, so it looks like we should merge | |
862 | // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's | |
863 | // not obvious that this is an error, either. So we just punt. | |
864 | ||
865 | // If one of the symbols has non-default visibility, and the | |
866 | // other is defined in a shared object, then they are different | |
867 | // symbols. | |
868 | ||
b60ecbc6 CC |
869 | // If the two symbols are from different shared objects, |
870 | // they are different symbols. | |
871 | ||
8c500701 ILT |
872 | // Otherwise, we just resolve the symbols as though they were |
873 | // the same. | |
874 | ||
875 | if (pdef->second->version() != NULL) | |
876 | gold_assert(pdef->second->version() != sym->version()); | |
877 | else if (sym->visibility() != elfcpp::STV_DEFAULT | |
878 | && pdef->second->is_from_dynobj()) | |
879 | ; | |
880 | else if (pdef->second->visibility() != elfcpp::STV_DEFAULT | |
881 | && sym->is_from_dynobj()) | |
882 | ; | |
b60ecbc6 CC |
883 | else if (pdef->second->is_from_dynobj() |
884 | && sym->is_from_dynobj() | |
885 | && pdef->second->object() != sym->object()) | |
886 | ; | |
8c500701 ILT |
887 | else |
888 | { | |
889 | const Sized_symbol<size>* symdef; | |
890 | symdef = this->get_sized_symbol<size>(pdef->second); | |
891 | Symbol_table::resolve<size, big_endian>(sym, symdef); | |
892 | this->make_forwarder(pdef->second, sym); | |
893 | pdef->second = sym; | |
894 | sym->set_is_default(); | |
895 | } | |
896 | } | |
897 | } | |
898 | ||
14bfc3f5 ILT |
899 | // Add one symbol from OBJECT to the symbol table. NAME is symbol |
900 | // name and VERSION is the version; both are canonicalized. DEF is | |
d491d34e ILT |
901 | // whether this is the default version. ST_SHNDX is the symbol's |
902 | // section index; IS_ORDINARY is whether this is a normal section | |
903 | // rather than a special code. | |
14bfc3f5 | 904 | |
8781f709 ILT |
905 | // If IS_DEFAULT_VERSION is true, then this is the definition of a |
906 | // default version of a symbol. That means that any lookup of | |
907 | // NAME/NULL and any lookup of NAME/VERSION should always return the | |
908 | // same symbol. This is obvious for references, but in particular we | |
909 | // want to do this for definitions: overriding NAME/NULL should also | |
910 | // override NAME/VERSION. If we don't do that, it would be very hard | |
911 | // to override functions in a shared library which uses versioning. | |
14bfc3f5 ILT |
912 | |
913 | // We implement this by simply making both entries in the hash table | |
914 | // point to the same Symbol structure. That is easy enough if this is | |
915 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible | |
916 | // that we have seen both already, in which case they will both have | |
917 | // independent entries in the symbol table. We can't simply change | |
918 | // the symbol table entry, because we have pointers to the entries | |
919 | // attached to the object files. So we mark the entry attached to the | |
920 | // object file as a forwarder, and record it in the forwarders_ map. | |
921 | // Note that entries in the hash table will never be marked as | |
922 | // forwarders. | |
70e654ba | 923 | // |
d491d34e ILT |
924 | // ORIG_ST_SHNDX and ST_SHNDX are almost always the same. |
925 | // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF | |
926 | // for a special section code. ST_SHNDX may be modified if the symbol | |
927 | // is defined in a section being discarded. | |
14bfc3f5 ILT |
928 | |
929 | template<int size, bool big_endian> | |
aeddab66 | 930 | Sized_symbol<size>* |
2ea97941 | 931 | Symbol_table::add_from_object(Object* object, |
ca09d69a | 932 | const char* name, |
f0641a0b | 933 | Stringpool::Key name_key, |
ca09d69a | 934 | const char* version, |
f0641a0b | 935 | Stringpool::Key version_key, |
8781f709 | 936 | bool is_default_version, |
70e654ba | 937 | const elfcpp::Sym<size, big_endian>& sym, |
d491d34e ILT |
938 | unsigned int st_shndx, |
939 | bool is_ordinary, | |
940 | unsigned int orig_st_shndx) | |
14bfc3f5 | 941 | { |
c5818ff1 | 942 | // Print a message if this symbol is being traced. |
2ea97941 | 943 | if (parameters->options().is_trace_symbol(name)) |
c5818ff1 | 944 | { |
d491d34e | 945 | if (orig_st_shndx == elfcpp::SHN_UNDEF) |
2ea97941 | 946 | gold_info(_("%s: reference to %s"), object->name().c_str(), name); |
c5818ff1 | 947 | else |
2ea97941 | 948 | gold_info(_("%s: definition of %s"), object->name().c_str(), name); |
c5818ff1 CC |
949 | } |
950 | ||
0864d551 ILT |
951 | // For an undefined symbol, we may need to adjust the name using |
952 | // --wrap. | |
d491d34e | 953 | if (orig_st_shndx == elfcpp::SHN_UNDEF |
c5818ff1 | 954 | && parameters->options().any_wrap()) |
0864d551 | 955 | { |
2ea97941 ILT |
956 | const char* wrap_name = this->wrap_symbol(name, &name_key); |
957 | if (wrap_name != name) | |
0864d551 ILT |
958 | { |
959 | // If we see a reference to malloc with version GLIBC_2.0, | |
960 | // and we turn it into a reference to __wrap_malloc, then we | |
961 | // discard the version number. Otherwise the user would be | |
962 | // required to specify the correct version for | |
963 | // __wrap_malloc. | |
2ea97941 | 964 | version = NULL; |
0864d551 | 965 | version_key = 0; |
2ea97941 | 966 | name = wrap_name; |
0864d551 ILT |
967 | } |
968 | } | |
969 | ||
14bfc3f5 ILT |
970 | Symbol* const snull = NULL; |
971 | std::pair<typename Symbol_table_type::iterator, bool> ins = | |
f0641a0b ILT |
972 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
973 | snull)); | |
14bfc3f5 | 974 | |
8781f709 | 975 | std::pair<typename Symbol_table_type::iterator, bool> insdefault = |
14bfc3f5 | 976 | std::make_pair(this->table_.end(), false); |
8781f709 | 977 | if (is_default_version) |
14bfc3f5 | 978 | { |
f0641a0b | 979 | const Stringpool::Key vnull_key = 0; |
8781f709 ILT |
980 | insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key, |
981 | vnull_key), | |
982 | snull)); | |
14bfc3f5 ILT |
983 | } |
984 | ||
985 | // ins.first: an iterator, which is a pointer to a pair. | |
986 | // ins.first->first: the key (a pair of name and version). | |
987 | // ins.first->second: the value (Symbol*). | |
988 | // ins.second: true if new entry was inserted, false if not. | |
989 | ||
1564db8d | 990 | Sized_symbol<size>* ret; |
ead1e424 ILT |
991 | bool was_undefined; |
992 | bool was_common; | |
14bfc3f5 ILT |
993 | if (!ins.second) |
994 | { | |
995 | // We already have an entry for NAME/VERSION. | |
7d1a9ebb | 996 | ret = this->get_sized_symbol<size>(ins.first->second); |
a3ad94ed | 997 | gold_assert(ret != NULL); |
ead1e424 ILT |
998 | |
999 | was_undefined = ret->is_undefined(); | |
1707f183 CC |
1000 | // Commons from plugins are just placeholders. |
1001 | was_common = ret->is_common() && ret->object()->pluginobj() == NULL; | |
ead1e424 | 1002 | |
2ea97941 | 1003 | this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object, |
b45e00b3 | 1004 | version, is_default_version); |
6d03d481 ST |
1005 | if (parameters->options().gc_sections()) |
1006 | this->gc_mark_dyn_syms(ret); | |
14bfc3f5 | 1007 | |
8781f709 ILT |
1008 | if (is_default_version) |
1009 | this->define_default_version<size, big_endian>(ret, insdefault.second, | |
1010 | insdefault.first); | |
3ac0a36c | 1011 | else |
b45e00b3 | 1012 | { |
b45e00b3 | 1013 | bool dummy; |
3ac0a36c CC |
1014 | if (version != NULL |
1015 | && ret->source() == Symbol::FROM_OBJECT | |
b45e00b3 CC |
1016 | && ret->object() == object |
1017 | && is_ordinary | |
3ac0a36c CC |
1018 | && ret->shndx(&dummy) == st_shndx |
1019 | && ret->is_default()) | |
b45e00b3 | 1020 | { |
3ac0a36c CC |
1021 | // We have seen NAME/VERSION already, and marked it as the |
1022 | // default version, but now we see a definition for | |
1023 | // NAME/VERSION that is not the default version. This can | |
1024 | // happen when the assembler generates two symbols for | |
1025 | // a symbol as a result of a ".symver foo,foo@VER" | |
1026 | // directive. We see the first unversioned symbol and | |
1027 | // we may mark it as the default version (from a | |
1028 | // version script); then we see the second versioned | |
1029 | // symbol and we need to override the first. | |
1030 | // In any other case, the two symbols should have generated | |
1031 | // a multiple definition error. | |
1032 | // (See PR gold/18703.) | |
b45e00b3 CC |
1033 | ret->set_is_not_default(); |
1034 | const Stringpool::Key vnull_key = 0; | |
1035 | this->table_.erase(std::make_pair(name_key, vnull_key)); | |
1036 | } | |
1037 | } | |
14bfc3f5 ILT |
1038 | } |
1039 | else | |
1040 | { | |
1041 | // This is the first time we have seen NAME/VERSION. | |
a3ad94ed | 1042 | gold_assert(ins.first->second == NULL); |
ead1e424 | 1043 | |
8781f709 | 1044 | if (is_default_version && !insdefault.second) |
14bfc3f5 | 1045 | { |
14b31740 ILT |
1046 | // We already have an entry for NAME/NULL. If we override |
1047 | // it, then change it to NAME/VERSION. | |
8781f709 | 1048 | ret = this->get_sized_symbol<size>(insdefault.first->second); |
18e6b24e ILT |
1049 | |
1050 | was_undefined = ret->is_undefined(); | |
1707f183 CC |
1051 | // Commons from plugins are just placeholders. |
1052 | was_common = ret->is_common() && ret->object()->pluginobj() == NULL; | |
18e6b24e | 1053 | |
2ea97941 | 1054 | this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object, |
b45e00b3 | 1055 | version, is_default_version); |
6d03d481 ST |
1056 | if (parameters->options().gc_sections()) |
1057 | this->gc_mark_dyn_syms(ret); | |
14bfc3f5 ILT |
1058 | ins.first->second = ret; |
1059 | } | |
1060 | else | |
1061 | { | |
18e6b24e ILT |
1062 | was_undefined = false; |
1063 | was_common = false; | |
1064 | ||
f6ce93d6 | 1065 | Sized_target<size, big_endian>* target = |
029ba973 | 1066 | parameters->sized_target<size, big_endian>(); |
1564db8d ILT |
1067 | if (!target->has_make_symbol()) |
1068 | ret = new Sized_symbol<size>(); | |
1069 | else | |
14bfc3f5 | 1070 | { |
dc1c8a16 CC |
1071 | ret = target->make_symbol(name, sym.get_st_type(), object, |
1072 | st_shndx, sym.get_st_value()); | |
1564db8d | 1073 | if (ret == NULL) |
14bfc3f5 ILT |
1074 | { |
1075 | // This means that we don't want a symbol table | |
1076 | // entry after all. | |
8781f709 | 1077 | if (!is_default_version) |
14bfc3f5 ILT |
1078 | this->table_.erase(ins.first); |
1079 | else | |
1080 | { | |
8781f709 ILT |
1081 | this->table_.erase(insdefault.first); |
1082 | // Inserting INSDEFAULT invalidated INS. | |
f0641a0b ILT |
1083 | this->table_.erase(std::make_pair(name_key, |
1084 | version_key)); | |
14bfc3f5 ILT |
1085 | } |
1086 | return NULL; | |
1087 | } | |
1088 | } | |
14bfc3f5 | 1089 | |
2ea97941 | 1090 | ret->init_object(name, version, object, sym, st_shndx, is_ordinary); |
1564db8d | 1091 | |
14bfc3f5 | 1092 | ins.first->second = ret; |
8781f709 | 1093 | if (is_default_version) |
14bfc3f5 ILT |
1094 | { |
1095 | // This is the first time we have seen NAME/NULL. Point | |
1096 | // it at the new entry for NAME/VERSION. | |
8781f709 ILT |
1097 | gold_assert(insdefault.second); |
1098 | insdefault.first->second = ret; | |
14bfc3f5 ILT |
1099 | } |
1100 | } | |
8c500701 | 1101 | |
8781f709 | 1102 | if (is_default_version) |
8c500701 | 1103 | ret->set_is_default(); |
14bfc3f5 ILT |
1104 | } |
1105 | ||
ead1e424 ILT |
1106 | // Record every time we see a new undefined symbol, to speed up |
1107 | // archive groups. | |
1108 | if (!was_undefined && ret->is_undefined()) | |
0f3b89d8 ILT |
1109 | { |
1110 | ++this->saw_undefined_; | |
1111 | if (parameters->options().has_plugins()) | |
1112 | parameters->options().plugins()->new_undefined_symbol(ret); | |
1113 | } | |
ead1e424 ILT |
1114 | |
1115 | // Keep track of common symbols, to speed up common symbol | |
1707f183 CC |
1116 | // allocation. Don't record commons from plugin objects; |
1117 | // we need to wait until we see the real symbol in the | |
1118 | // replacement file. | |
1119 | if (!was_common && ret->is_common() && ret->object()->pluginobj() == NULL) | |
155a0dd7 | 1120 | { |
8a5e3e08 | 1121 | if (ret->type() == elfcpp::STT_TLS) |
155a0dd7 | 1122 | this->tls_commons_.push_back(ret); |
8a5e3e08 ILT |
1123 | else if (!is_ordinary |
1124 | && st_shndx == parameters->target().small_common_shndx()) | |
1125 | this->small_commons_.push_back(ret); | |
1126 | else if (!is_ordinary | |
1127 | && st_shndx == parameters->target().large_common_shndx()) | |
1128 | this->large_commons_.push_back(ret); | |
1129 | else | |
1130 | this->commons_.push_back(ret); | |
155a0dd7 | 1131 | } |
ead1e424 | 1132 | |
0602e05a ILT |
1133 | // If we're not doing a relocatable link, then any symbol with |
1134 | // hidden or internal visibility is local. | |
1135 | if ((ret->visibility() == elfcpp::STV_HIDDEN | |
1136 | || ret->visibility() == elfcpp::STV_INTERNAL) | |
1137 | && (ret->binding() == elfcpp::STB_GLOBAL | |
adcf2816 | 1138 | || ret->binding() == elfcpp::STB_GNU_UNIQUE |
0602e05a ILT |
1139 | || ret->binding() == elfcpp::STB_WEAK) |
1140 | && !parameters->options().relocatable()) | |
1141 | this->force_local(ret); | |
1142 | ||
14bfc3f5 ILT |
1143 | return ret; |
1144 | } | |
1145 | ||
f6ce93d6 | 1146 | // Add all the symbols in a relocatable object to the hash table. |
14bfc3f5 ILT |
1147 | |
1148 | template<int size, bool big_endian> | |
1149 | void | |
dbe717ef | 1150 | Symbol_table::add_from_relobj( |
6fa2a40b | 1151 | Sized_relobj_file<size, big_endian>* relobj, |
f6ce93d6 | 1152 | const unsigned char* syms, |
14bfc3f5 | 1153 | size_t count, |
d491d34e | 1154 | size_t symndx_offset, |
14bfc3f5 ILT |
1155 | const char* sym_names, |
1156 | size_t sym_name_size, | |
6fa2a40b | 1157 | typename Sized_relobj_file<size, big_endian>::Symbols* sympointers, |
ca09d69a | 1158 | size_t* defined) |
14bfc3f5 | 1159 | { |
92de84a6 ILT |
1160 | *defined = 0; |
1161 | ||
8851ecca | 1162 | gold_assert(size == parameters->target().get_size()); |
14bfc3f5 | 1163 | |
a783673b ILT |
1164 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
1165 | ||
88dd47ac ILT |
1166 | const bool just_symbols = relobj->just_symbols(); |
1167 | ||
f6ce93d6 | 1168 | const unsigned char* p = syms; |
a783673b | 1169 | for (size_t i = 0; i < count; ++i, p += sym_size) |
14bfc3f5 | 1170 | { |
92de84a6 ILT |
1171 | (*sympointers)[i] = NULL; |
1172 | ||
14bfc3f5 ILT |
1173 | elfcpp::Sym<size, big_endian> sym(p); |
1174 | ||
d491d34e | 1175 | unsigned int st_name = sym.get_st_name(); |
14bfc3f5 ILT |
1176 | if (st_name >= sym_name_size) |
1177 | { | |
75f2446e ILT |
1178 | relobj->error(_("bad global symbol name offset %u at %zu"), |
1179 | st_name, i); | |
1180 | continue; | |
14bfc3f5 ILT |
1181 | } |
1182 | ||
2ea97941 | 1183 | const char* name = sym_names + st_name; |
dbe717ef | 1184 | |
bebf4942 L |
1185 | if (!parameters->options().relocatable() |
1186 | && strcmp (name, "__gnu_lto_slim") == 0) | |
7cd4e5b7 AM |
1187 | gold_info(_("%s: plugin needed to handle lto object"), |
1188 | relobj->name().c_str()); | |
1189 | ||
d491d34e ILT |
1190 | bool is_ordinary; |
1191 | unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset, | |
1192 | sym.get_st_shndx(), | |
1193 | &is_ordinary); | |
1194 | unsigned int orig_st_shndx = st_shndx; | |
1195 | if (!is_ordinary) | |
1196 | orig_st_shndx = elfcpp::SHN_UNDEF; | |
1197 | ||
92de84a6 ILT |
1198 | if (st_shndx != elfcpp::SHN_UNDEF) |
1199 | ++*defined; | |
1200 | ||
a783673b ILT |
1201 | // A symbol defined in a section which we are not including must |
1202 | // be treated as an undefined symbol. | |
880cd20d | 1203 | bool is_defined_in_discarded_section = false; |
a783673b | 1204 | if (st_shndx != elfcpp::SHN_UNDEF |
d491d34e | 1205 | && is_ordinary |
ce97fa81 ST |
1206 | && !relobj->is_section_included(st_shndx) |
1207 | && !this->is_section_folded(relobj, st_shndx)) | |
880cd20d ILT |
1208 | { |
1209 | st_shndx = elfcpp::SHN_UNDEF; | |
1210 | is_defined_in_discarded_section = true; | |
1211 | } | |
a783673b | 1212 | |
14bfc3f5 ILT |
1213 | // In an object file, an '@' in the name separates the symbol |
1214 | // name from the version name. If there are two '@' characters, | |
1215 | // this is the default version. | |
2ea97941 | 1216 | const char* ver = strchr(name, '@'); |
057ead22 | 1217 | Stringpool::Key ver_key = 0; |
09124467 | 1218 | int namelen = 0; |
8781f709 ILT |
1219 | // IS_DEFAULT_VERSION: is the version default? |
1220 | // IS_FORCED_LOCAL: is the symbol forced local? | |
1221 | bool is_default_version = false; | |
1222 | bool is_forced_local = false; | |
09124467 | 1223 | |
a7dac153 CC |
1224 | // FIXME: For incremental links, we don't store version information, |
1225 | // so we need to ignore version symbols for now. | |
1226 | if (parameters->incremental_update() && ver != NULL) | |
1227 | { | |
1228 | namelen = ver - name; | |
1229 | ver = NULL; | |
1230 | } | |
1231 | ||
09124467 ILT |
1232 | if (ver != NULL) |
1233 | { | |
1234 | // The symbol name is of the form foo@VERSION or foo@@VERSION | |
2ea97941 | 1235 | namelen = ver - name; |
09124467 ILT |
1236 | ++ver; |
1237 | if (*ver == '@') | |
1238 | { | |
8781f709 | 1239 | is_default_version = true; |
09124467 ILT |
1240 | ++ver; |
1241 | } | |
057ead22 | 1242 | ver = this->namepool_.add(ver, true, &ver_key); |
09124467 | 1243 | } |
5871526f ILT |
1244 | // We don't want to assign a version to an undefined symbol, |
1245 | // even if it is listed in the version script. FIXME: What | |
1246 | // about a common symbol? | |
057ead22 ILT |
1247 | else |
1248 | { | |
2ea97941 | 1249 | namelen = strlen(name); |
057ead22 ILT |
1250 | if (!this->version_script_.empty() |
1251 | && st_shndx != elfcpp::SHN_UNDEF) | |
1252 | { | |
1253 | // The symbol name did not have a version, but the | |
1254 | // version script may assign a version anyway. | |
2ea97941 | 1255 | std::string version; |
98e090bd ILT |
1256 | bool is_global; |
1257 | if (this->version_script_.get_symbol_version(name, &version, | |
1258 | &is_global)) | |
057ead22 | 1259 | { |
98e090bd ILT |
1260 | if (!is_global) |
1261 | is_forced_local = true; | |
1262 | else if (!version.empty()) | |
057ead22 | 1263 | { |
2ea97941 ILT |
1264 | ver = this->namepool_.add_with_length(version.c_str(), |
1265 | version.length(), | |
057ead22 ILT |
1266 | true, |
1267 | &ver_key); | |
8781f709 | 1268 | is_default_version = true; |
057ead22 ILT |
1269 | } |
1270 | } | |
057ead22 ILT |
1271 | } |
1272 | } | |
14bfc3f5 | 1273 | |
d491d34e ILT |
1274 | elfcpp::Sym<size, big_endian>* psym = &sym; |
1275 | unsigned char symbuf[sym_size]; | |
1276 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
88dd47ac ILT |
1277 | if (just_symbols) |
1278 | { | |
d491d34e | 1279 | memcpy(symbuf, p, sym_size); |
88dd47ac | 1280 | elfcpp::Sym_write<size, big_endian> sw(symbuf); |
9590bf25 CC |
1281 | if (orig_st_shndx != elfcpp::SHN_UNDEF |
1282 | && is_ordinary | |
1283 | && relobj->e_type() == elfcpp::ET_REL) | |
88dd47ac | 1284 | { |
9590bf25 CC |
1285 | // Symbol values in relocatable object files are section |
1286 | // relative. This is normally what we want, but since here | |
1287 | // we are converting the symbol to absolute we need to add | |
1288 | // the section address. The section address in an object | |
88dd47ac ILT |
1289 | // file is normally zero, but people can use a linker |
1290 | // script to change it. | |
d491d34e ILT |
1291 | sw.put_st_value(sym.get_st_value() |
1292 | + relobj->section_address(orig_st_shndx)); | |
88dd47ac | 1293 | } |
d491d34e ILT |
1294 | st_shndx = elfcpp::SHN_ABS; |
1295 | is_ordinary = false; | |
88dd47ac ILT |
1296 | psym = &sym2; |
1297 | } | |
1298 | ||
65514900 | 1299 | // Fix up visibility if object has no-export set. |
1c74fab0 ILT |
1300 | if (relobj->no_export() |
1301 | && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary)) | |
65514900 CC |
1302 | { |
1303 | // We may have copied symbol already above. | |
1304 | if (psym != &sym2) | |
1305 | { | |
1306 | memcpy(symbuf, p, sym_size); | |
1307 | psym = &sym2; | |
1308 | } | |
1309 | ||
1310 | elfcpp::STV visibility = sym2.get_st_visibility(); | |
1311 | if (visibility == elfcpp::STV_DEFAULT | |
1312 | || visibility == elfcpp::STV_PROTECTED) | |
1313 | { | |
1314 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
1315 | unsigned char nonvis = sym2.get_st_nonvis(); | |
1316 | sw.put_st_other(elfcpp::STV_HIDDEN, nonvis); | |
1317 | } | |
1318 | } | |
1319 | ||
057ead22 | 1320 | Stringpool::Key name_key; |
2ea97941 | 1321 | name = this->namepool_.add_with_length(name, namelen, true, |
057ead22 ILT |
1322 | &name_key); |
1323 | ||
aeddab66 | 1324 | Sized_symbol<size>* res; |
2ea97941 | 1325 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
8781f709 ILT |
1326 | is_default_version, *psym, st_shndx, |
1327 | is_ordinary, orig_st_shndx); | |
6d03d481 | 1328 | |
804eb480 ST |
1329 | if (is_forced_local) |
1330 | this->force_local(res); | |
1331 | ||
7257cc92 ST |
1332 | // Do not treat this symbol as garbage if this symbol will be |
1333 | // exported to the dynamic symbol table. This is true when | |
1334 | // building a shared library or using --export-dynamic and | |
1335 | // the symbol is externally visible. | |
1336 | if (parameters->options().gc_sections() | |
1337 | && res->is_externally_visible() | |
1338 | && !res->is_from_dynobj() | |
1339 | && (parameters->options().shared() | |
fd834e57 CC |
1340 | || parameters->options().export_dynamic() |
1341 | || parameters->options().in_dynamic_list(res->name()))) | |
7257cc92 | 1342 | this->gc_mark_symbol(res); |
f0641a0b | 1343 | |
880cd20d ILT |
1344 | if (is_defined_in_discarded_section) |
1345 | res->set_is_defined_in_discarded_section(); | |
1346 | ||
730cdc88 | 1347 | (*sympointers)[i] = res; |
14bfc3f5 ILT |
1348 | } |
1349 | } | |
1350 | ||
89fc3421 CC |
1351 | // Add a symbol from a plugin-claimed file. |
1352 | ||
1353 | template<int size, bool big_endian> | |
1354 | Symbol* | |
1355 | Symbol_table::add_from_pluginobj( | |
1356 | Sized_pluginobj<size, big_endian>* obj, | |
2ea97941 | 1357 | const char* name, |
89fc3421 CC |
1358 | const char* ver, |
1359 | elfcpp::Sym<size, big_endian>* sym) | |
1360 | { | |
1361 | unsigned int st_shndx = sym->get_st_shndx(); | |
24998053 | 1362 | bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE; |
89fc3421 CC |
1363 | |
1364 | Stringpool::Key ver_key = 0; | |
8781f709 ILT |
1365 | bool is_default_version = false; |
1366 | bool is_forced_local = false; | |
89fc3421 CC |
1367 | |
1368 | if (ver != NULL) | |
1369 | { | |
1370 | ver = this->namepool_.add(ver, true, &ver_key); | |
1371 | } | |
1372 | // We don't want to assign a version to an undefined symbol, | |
1373 | // even if it is listed in the version script. FIXME: What | |
1374 | // about a common symbol? | |
1375 | else | |
1376 | { | |
1377 | if (!this->version_script_.empty() | |
1378 | && st_shndx != elfcpp::SHN_UNDEF) | |
1379 | { | |
1380 | // The symbol name did not have a version, but the | |
1381 | // version script may assign a version anyway. | |
2ea97941 | 1382 | std::string version; |
98e090bd ILT |
1383 | bool is_global; |
1384 | if (this->version_script_.get_symbol_version(name, &version, | |
1385 | &is_global)) | |
89fc3421 | 1386 | { |
98e090bd ILT |
1387 | if (!is_global) |
1388 | is_forced_local = true; | |
1389 | else if (!version.empty()) | |
89fc3421 | 1390 | { |
2ea97941 ILT |
1391 | ver = this->namepool_.add_with_length(version.c_str(), |
1392 | version.length(), | |
89fc3421 CC |
1393 | true, |
1394 | &ver_key); | |
8781f709 | 1395 | is_default_version = true; |
89fc3421 CC |
1396 | } |
1397 | } | |
89fc3421 CC |
1398 | } |
1399 | } | |
1400 | ||
1401 | Stringpool::Key name_key; | |
2ea97941 | 1402 | name = this->namepool_.add(name, true, &name_key); |
89fc3421 CC |
1403 | |
1404 | Sized_symbol<size>* res; | |
2ea97941 | 1405 | res = this->add_from_object(obj, name, name_key, ver, ver_key, |
8781f709 ILT |
1406 | is_default_version, *sym, st_shndx, |
1407 | is_ordinary, st_shndx); | |
89fc3421 | 1408 | |
8781f709 | 1409 | if (is_forced_local) |
0602e05a | 1410 | this->force_local(res); |
89fc3421 CC |
1411 | |
1412 | return res; | |
1413 | } | |
1414 | ||
dbe717ef ILT |
1415 | // Add all the symbols in a dynamic object to the hash table. |
1416 | ||
1417 | template<int size, bool big_endian> | |
1418 | void | |
1419 | Symbol_table::add_from_dynobj( | |
1420 | Sized_dynobj<size, big_endian>* dynobj, | |
1421 | const unsigned char* syms, | |
1422 | size_t count, | |
1423 | const char* sym_names, | |
1424 | size_t sym_name_size, | |
1425 | const unsigned char* versym, | |
1426 | size_t versym_size, | |
92de84a6 | 1427 | const std::vector<const char*>* version_map, |
6fa2a40b | 1428 | typename Sized_relobj_file<size, big_endian>::Symbols* sympointers, |
92de84a6 | 1429 | size_t* defined) |
dbe717ef | 1430 | { |
92de84a6 ILT |
1431 | *defined = 0; |
1432 | ||
8851ecca | 1433 | gold_assert(size == parameters->target().get_size()); |
dbe717ef | 1434 | |
88dd47ac ILT |
1435 | if (dynobj->just_symbols()) |
1436 | { | |
1437 | gold_error(_("--just-symbols does not make sense with a shared object")); | |
1438 | return; | |
1439 | } | |
1440 | ||
a7dac153 CC |
1441 | // FIXME: For incremental links, we don't store version information, |
1442 | // so we need to ignore version symbols for now. | |
1443 | if (parameters->incremental_update()) | |
1444 | versym = NULL; | |
1445 | ||
dbe717ef ILT |
1446 | if (versym != NULL && versym_size / 2 < count) |
1447 | { | |
75f2446e ILT |
1448 | dynobj->error(_("too few symbol versions")); |
1449 | return; | |
dbe717ef ILT |
1450 | } |
1451 | ||
1452 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1453 | ||
aeddab66 ILT |
1454 | // We keep a list of all STT_OBJECT symbols, so that we can resolve |
1455 | // weak aliases. This is necessary because if the dynamic object | |
1456 | // provides the same variable under two names, one of which is a | |
1457 | // weak definition, and the regular object refers to the weak | |
1458 | // definition, we have to put both the weak definition and the | |
1459 | // strong definition into the dynamic symbol table. Given a weak | |
1460 | // definition, the only way that we can find the corresponding | |
1461 | // strong definition, if any, is to search the symbol table. | |
1462 | std::vector<Sized_symbol<size>*> object_symbols; | |
1463 | ||
dbe717ef ILT |
1464 | const unsigned char* p = syms; |
1465 | const unsigned char* vs = versym; | |
1466 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) | |
1467 | { | |
1468 | elfcpp::Sym<size, big_endian> sym(p); | |
1469 | ||
92de84a6 ILT |
1470 | if (sympointers != NULL) |
1471 | (*sympointers)[i] = NULL; | |
1472 | ||
65778909 ILT |
1473 | // Ignore symbols with local binding or that have |
1474 | // internal or hidden visibility. | |
1475 | if (sym.get_st_bind() == elfcpp::STB_LOCAL | |
1476 | || sym.get_st_visibility() == elfcpp::STV_INTERNAL | |
1477 | || sym.get_st_visibility() == elfcpp::STV_HIDDEN) | |
dbe717ef ILT |
1478 | continue; |
1479 | ||
8bdcdf2c ILT |
1480 | // A protected symbol in a shared library must be treated as a |
1481 | // normal symbol when viewed from outside the shared library. | |
1482 | // Implement this by overriding the visibility here. | |
3d4fde69 CC |
1483 | // Likewise, an IFUNC symbol in a shared library must be treated |
1484 | // as a normal FUNC symbol. | |
8bdcdf2c ILT |
1485 | elfcpp::Sym<size, big_endian>* psym = &sym; |
1486 | unsigned char symbuf[sym_size]; | |
1487 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
3d4fde69 CC |
1488 | if (sym.get_st_visibility() == elfcpp::STV_PROTECTED |
1489 | || sym.get_st_type() == elfcpp::STT_GNU_IFUNC) | |
8bdcdf2c ILT |
1490 | { |
1491 | memcpy(symbuf, p, sym_size); | |
1492 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
3d4fde69 CC |
1493 | if (sym.get_st_visibility() == elfcpp::STV_PROTECTED) |
1494 | sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis()); | |
1495 | if (sym.get_st_type() == elfcpp::STT_GNU_IFUNC) | |
1496 | sw.put_st_info(sym.get_st_bind(), elfcpp::STT_FUNC); | |
8bdcdf2c ILT |
1497 | psym = &sym2; |
1498 | } | |
1499 | ||
1500 | unsigned int st_name = psym->get_st_name(); | |
dbe717ef ILT |
1501 | if (st_name >= sym_name_size) |
1502 | { | |
75f2446e ILT |
1503 | dynobj->error(_("bad symbol name offset %u at %zu"), |
1504 | st_name, i); | |
1505 | continue; | |
dbe717ef ILT |
1506 | } |
1507 | ||
2ea97941 | 1508 | const char* name = sym_names + st_name; |
dbe717ef | 1509 | |
d491d34e | 1510 | bool is_ordinary; |
8bdcdf2c | 1511 | unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(), |
d491d34e ILT |
1512 | &is_ordinary); |
1513 | ||
92de84a6 ILT |
1514 | if (st_shndx != elfcpp::SHN_UNDEF) |
1515 | ++*defined; | |
1516 | ||
aeddab66 ILT |
1517 | Sized_symbol<size>* res; |
1518 | ||
dbe717ef ILT |
1519 | if (versym == NULL) |
1520 | { | |
1521 | Stringpool::Key name_key; | |
2ea97941 ILT |
1522 | name = this->namepool_.add(name, true, &name_key); |
1523 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, | |
8bdcdf2c | 1524 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1525 | st_shndx); |
dbe717ef | 1526 | } |
aeddab66 ILT |
1527 | else |
1528 | { | |
1529 | // Read the version information. | |
dbe717ef | 1530 | |
aeddab66 | 1531 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); |
dbe717ef | 1532 | |
aeddab66 ILT |
1533 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; |
1534 | v &= elfcpp::VERSYM_VERSION; | |
dbe717ef | 1535 | |
aeddab66 ILT |
1536 | // The Sun documentation says that V can be VER_NDX_LOCAL, |
1537 | // or VER_NDX_GLOBAL, or a version index. The meaning of | |
1538 | // VER_NDX_LOCAL is defined as "Symbol has local scope." | |
1539 | // The old GNU linker will happily generate VER_NDX_LOCAL | |
1540 | // for an undefined symbol. I don't know what the Sun | |
1541 | // linker will generate. | |
dbe717ef | 1542 | |
aeddab66 | 1543 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
d491d34e | 1544 | && st_shndx != elfcpp::SHN_UNDEF) |
aeddab66 ILT |
1545 | { |
1546 | // This symbol should not be visible outside the object. | |
1547 | continue; | |
1548 | } | |
64707334 | 1549 | |
aeddab66 ILT |
1550 | // At this point we are definitely going to add this symbol. |
1551 | Stringpool::Key name_key; | |
2ea97941 | 1552 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef | 1553 | |
aeddab66 ILT |
1554 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
1555 | || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) | |
1556 | { | |
1557 | // This symbol does not have a version. | |
2ea97941 | 1558 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
8bdcdf2c | 1559 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1560 | st_shndx); |
aeddab66 ILT |
1561 | } |
1562 | else | |
1563 | { | |
1564 | if (v >= version_map->size()) | |
1565 | { | |
1566 | dynobj->error(_("versym for symbol %zu out of range: %u"), | |
1567 | i, v); | |
1568 | continue; | |
1569 | } | |
dbe717ef | 1570 | |
2ea97941 ILT |
1571 | const char* version = (*version_map)[v]; |
1572 | if (version == NULL) | |
aeddab66 ILT |
1573 | { |
1574 | dynobj->error(_("versym for symbol %zu has no name: %u"), | |
1575 | i, v); | |
1576 | continue; | |
1577 | } | |
dbe717ef | 1578 | |
aeddab66 | 1579 | Stringpool::Key version_key; |
2ea97941 | 1580 | version = this->namepool_.add(version, true, &version_key); |
aeddab66 ILT |
1581 | |
1582 | // If this is an absolute symbol, and the version name | |
1583 | // and symbol name are the same, then this is the | |
1584 | // version definition symbol. These symbols exist to | |
1585 | // support using -u to pull in particular versions. We | |
1586 | // do not want to record a version for them. | |
d491d34e ILT |
1587 | if (st_shndx == elfcpp::SHN_ABS |
1588 | && !is_ordinary | |
aeddab66 | 1589 | && name_key == version_key) |
2ea97941 | 1590 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
8bdcdf2c | 1591 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1592 | st_shndx); |
aeddab66 ILT |
1593 | else |
1594 | { | |
8781f709 ILT |
1595 | const bool is_default_version = |
1596 | !hidden && st_shndx != elfcpp::SHN_UNDEF; | |
2ea97941 | 1597 | res = this->add_from_object(dynobj, name, name_key, version, |
8781f709 ILT |
1598 | version_key, is_default_version, |
1599 | *psym, st_shndx, | |
d491d34e | 1600 | is_ordinary, st_shndx); |
aeddab66 ILT |
1601 | } |
1602 | } | |
dbe717ef ILT |
1603 | } |
1604 | ||
99a37bfd | 1605 | // Note that it is possible that RES was overridden by an |
a4bb589a | 1606 | // earlier object, in which case it can't be aliased here. |
d491d34e ILT |
1607 | if (st_shndx != elfcpp::SHN_UNDEF |
1608 | && is_ordinary | |
8bdcdf2c | 1609 | && psym->get_st_type() == elfcpp::STT_OBJECT |
99a37bfd ILT |
1610 | && res->source() == Symbol::FROM_OBJECT |
1611 | && res->object() == dynobj) | |
aeddab66 | 1612 | object_symbols.push_back(res); |
92de84a6 | 1613 | |
6eeb0170 CC |
1614 | // If the symbol has protected visibility in the dynobj, |
1615 | // mark it as such if it was not overridden. | |
1616 | if (res->source() == Symbol::FROM_OBJECT | |
1617 | && res->object() == dynobj | |
1618 | && sym.get_st_visibility() == elfcpp::STV_PROTECTED) | |
1619 | res->set_is_protected(); | |
1620 | ||
92de84a6 ILT |
1621 | if (sympointers != NULL) |
1622 | (*sympointers)[i] = res; | |
aeddab66 ILT |
1623 | } |
1624 | ||
1625 | this->record_weak_aliases(&object_symbols); | |
1626 | } | |
1627 | ||
cdc29364 CC |
1628 | // Add a symbol from a incremental object file. |
1629 | ||
1630 | template<int size, bool big_endian> | |
26d3c67d | 1631 | Sized_symbol<size>* |
cdc29364 CC |
1632 | Symbol_table::add_from_incrobj( |
1633 | Object* obj, | |
1634 | const char* name, | |
1635 | const char* ver, | |
1636 | elfcpp::Sym<size, big_endian>* sym) | |
1637 | { | |
1638 | unsigned int st_shndx = sym->get_st_shndx(); | |
1639 | bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE; | |
1640 | ||
1641 | Stringpool::Key ver_key = 0; | |
1642 | bool is_default_version = false; | |
1643 | bool is_forced_local = false; | |
1644 | ||
1645 | Stringpool::Key name_key; | |
1646 | name = this->namepool_.add(name, true, &name_key); | |
1647 | ||
1648 | Sized_symbol<size>* res; | |
1649 | res = this->add_from_object(obj, name, name_key, ver, ver_key, | |
1650 | is_default_version, *sym, st_shndx, | |
1651 | is_ordinary, st_shndx); | |
1652 | ||
1653 | if (is_forced_local) | |
1654 | this->force_local(res); | |
1655 | ||
1656 | return res; | |
1657 | } | |
1658 | ||
aeddab66 ILT |
1659 | // This is used to sort weak aliases. We sort them first by section |
1660 | // index, then by offset, then by weak ahead of strong. | |
1661 | ||
1662 | template<int size> | |
1663 | class Weak_alias_sorter | |
1664 | { | |
1665 | public: | |
1666 | bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const; | |
1667 | }; | |
1668 | ||
1669 | template<int size> | |
1670 | bool | |
1671 | Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1, | |
1672 | const Sized_symbol<size>* s2) const | |
1673 | { | |
d491d34e ILT |
1674 | bool is_ordinary; |
1675 | unsigned int s1_shndx = s1->shndx(&is_ordinary); | |
1676 | gold_assert(is_ordinary); | |
1677 | unsigned int s2_shndx = s2->shndx(&is_ordinary); | |
1678 | gold_assert(is_ordinary); | |
1679 | if (s1_shndx != s2_shndx) | |
1680 | return s1_shndx < s2_shndx; | |
1681 | ||
aeddab66 ILT |
1682 | if (s1->value() != s2->value()) |
1683 | return s1->value() < s2->value(); | |
1684 | if (s1->binding() != s2->binding()) | |
1685 | { | |
1686 | if (s1->binding() == elfcpp::STB_WEAK) | |
1687 | return true; | |
1688 | if (s2->binding() == elfcpp::STB_WEAK) | |
1689 | return false; | |
1690 | } | |
1691 | return std::string(s1->name()) < std::string(s2->name()); | |
1692 | } | |
dbe717ef | 1693 | |
aeddab66 ILT |
1694 | // SYMBOLS is a list of object symbols from a dynamic object. Look |
1695 | // for any weak aliases, and record them so that if we add the weak | |
1696 | // alias to the dynamic symbol table, we also add the corresponding | |
1697 | // strong symbol. | |
dbe717ef | 1698 | |
aeddab66 ILT |
1699 | template<int size> |
1700 | void | |
1701 | Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols) | |
1702 | { | |
1703 | // Sort the vector by section index, then by offset, then by weak | |
1704 | // ahead of strong. | |
1705 | std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>()); | |
1706 | ||
1707 | // Walk through the vector. For each weak definition, record | |
1708 | // aliases. | |
1709 | for (typename std::vector<Sized_symbol<size>*>::const_iterator p = | |
1710 | symbols->begin(); | |
1711 | p != symbols->end(); | |
1712 | ++p) | |
1713 | { | |
1714 | if ((*p)->binding() != elfcpp::STB_WEAK) | |
1715 | continue; | |
1716 | ||
1717 | // Build a circular list of weak aliases. Each symbol points to | |
1718 | // the next one in the circular list. | |
1719 | ||
1720 | Sized_symbol<size>* from_sym = *p; | |
1721 | typename std::vector<Sized_symbol<size>*>::const_iterator q; | |
1722 | for (q = p + 1; q != symbols->end(); ++q) | |
dbe717ef | 1723 | { |
d491d34e ILT |
1724 | bool dummy; |
1725 | if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy) | |
aeddab66 ILT |
1726 | || (*q)->value() != from_sym->value()) |
1727 | break; | |
1728 | ||
1729 | this->weak_aliases_[from_sym] = *q; | |
1730 | from_sym->set_has_alias(); | |
1731 | from_sym = *q; | |
dbe717ef ILT |
1732 | } |
1733 | ||
aeddab66 ILT |
1734 | if (from_sym != *p) |
1735 | { | |
1736 | this->weak_aliases_[from_sym] = *p; | |
1737 | from_sym->set_has_alias(); | |
1738 | } | |
dbe717ef | 1739 | |
aeddab66 | 1740 | p = q - 1; |
dbe717ef ILT |
1741 | } |
1742 | } | |
1743 | ||
ead1e424 ILT |
1744 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
1745 | // true, then only create the symbol if there is a reference to it. | |
86f2e683 | 1746 | // If this does not return NULL, it sets *POLDSYM to the existing |
8c500701 ILT |
1747 | // symbol if there is one. This sets *RESOLVE_OLDSYM if we should |
1748 | // resolve the newly created symbol to the old one. This | |
1749 | // canonicalizes *PNAME and *PVERSION. | |
ead1e424 ILT |
1750 | |
1751 | template<int size, bool big_endian> | |
1752 | Sized_symbol<size>* | |
9b07f471 ILT |
1753 | Symbol_table::define_special_symbol(const char** pname, const char** pversion, |
1754 | bool only_if_ref, | |
8c500701 | 1755 | Sized_symbol<size>** poldsym, |
ca09d69a | 1756 | bool* resolve_oldsym) |
ead1e424 | 1757 | { |
8c500701 | 1758 | *resolve_oldsym = false; |
8cc69fb6 | 1759 | *poldsym = NULL; |
ead1e424 | 1760 | |
55a93433 ILT |
1761 | // If the caller didn't give us a version, see if we get one from |
1762 | // the version script. | |
057ead22 | 1763 | std::string v; |
8c500701 | 1764 | bool is_default_version = false; |
55a93433 ILT |
1765 | if (*pversion == NULL) |
1766 | { | |
98e090bd ILT |
1767 | bool is_global; |
1768 | if (this->version_script_.get_symbol_version(*pname, &v, &is_global)) | |
057ead22 | 1769 | { |
98e090bd ILT |
1770 | if (is_global && !v.empty()) |
1771 | { | |
1772 | *pversion = v.c_str(); | |
1773 | // If we get the version from a version script, then we | |
1774 | // are also the default version. | |
1775 | is_default_version = true; | |
1776 | } | |
057ead22 | 1777 | } |
55a93433 ILT |
1778 | } |
1779 | ||
8c500701 ILT |
1780 | Symbol* oldsym; |
1781 | Sized_symbol<size>* sym; | |
1782 | ||
1783 | bool add_to_table = false; | |
1784 | typename Symbol_table_type::iterator add_loc = this->table_.end(); | |
1785 | bool add_def_to_table = false; | |
1786 | typename Symbol_table_type::iterator add_def_loc = this->table_.end(); | |
1787 | ||
ead1e424 ILT |
1788 | if (only_if_ref) |
1789 | { | |
306d9ef0 | 1790 | oldsym = this->lookup(*pname, *pversion); |
8c500701 ILT |
1791 | if (oldsym == NULL && is_default_version) |
1792 | oldsym = this->lookup(*pname, NULL); | |
f6ce93d6 | 1793 | if (oldsym == NULL || !oldsym->is_undefined()) |
ead1e424 | 1794 | return NULL; |
306d9ef0 ILT |
1795 | |
1796 | *pname = oldsym->name(); | |
eebd87a5 ILT |
1797 | if (is_default_version) |
1798 | *pversion = this->namepool_.add(*pversion, true, NULL); | |
1799 | else | |
8c500701 | 1800 | *pversion = oldsym->version(); |
ead1e424 ILT |
1801 | } |
1802 | else | |
1803 | { | |
14b31740 | 1804 | // Canonicalize NAME and VERSION. |
f0641a0b | 1805 | Stringpool::Key name_key; |
cfd73a4e | 1806 | *pname = this->namepool_.add(*pname, true, &name_key); |
ead1e424 | 1807 | |
14b31740 | 1808 | Stringpool::Key version_key = 0; |
306d9ef0 | 1809 | if (*pversion != NULL) |
cfd73a4e | 1810 | *pversion = this->namepool_.add(*pversion, true, &version_key); |
14b31740 | 1811 | |
ead1e424 | 1812 | Symbol* const snull = NULL; |
ead1e424 | 1813 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
14b31740 ILT |
1814 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
1815 | version_key), | |
ead1e424 ILT |
1816 | snull)); |
1817 | ||
8781f709 | 1818 | std::pair<typename Symbol_table_type::iterator, bool> insdefault = |
8c500701 ILT |
1819 | std::make_pair(this->table_.end(), false); |
1820 | if (is_default_version) | |
1821 | { | |
1822 | const Stringpool::Key vnull = 0; | |
8781f709 ILT |
1823 | insdefault = |
1824 | this->table_.insert(std::make_pair(std::make_pair(name_key, | |
1825 | vnull), | |
1826 | snull)); | |
8c500701 ILT |
1827 | } |
1828 | ||
ead1e424 ILT |
1829 | if (!ins.second) |
1830 | { | |
14b31740 | 1831 | // We already have a symbol table entry for NAME/VERSION. |
ead1e424 | 1832 | oldsym = ins.first->second; |
a3ad94ed | 1833 | gold_assert(oldsym != NULL); |
8c500701 ILT |
1834 | |
1835 | if (is_default_version) | |
1836 | { | |
1837 | Sized_symbol<size>* soldsym = | |
1838 | this->get_sized_symbol<size>(oldsym); | |
1839 | this->define_default_version<size, big_endian>(soldsym, | |
8781f709 ILT |
1840 | insdefault.second, |
1841 | insdefault.first); | |
8c500701 | 1842 | } |
ead1e424 ILT |
1843 | } |
1844 | else | |
1845 | { | |
1846 | // We haven't seen this symbol before. | |
a3ad94ed | 1847 | gold_assert(ins.first->second == NULL); |
8c500701 ILT |
1848 | |
1849 | add_to_table = true; | |
1850 | add_loc = ins.first; | |
1851 | ||
8781f709 | 1852 | if (is_default_version && !insdefault.second) |
8c500701 ILT |
1853 | { |
1854 | // We are adding NAME/VERSION, and it is the default | |
1855 | // version. We already have an entry for NAME/NULL. | |
8781f709 | 1856 | oldsym = insdefault.first->second; |
8c500701 ILT |
1857 | *resolve_oldsym = true; |
1858 | } | |
1859 | else | |
1860 | { | |
1861 | oldsym = NULL; | |
1862 | ||
1863 | if (is_default_version) | |
1864 | { | |
1865 | add_def_to_table = true; | |
8781f709 | 1866 | add_def_loc = insdefault.first; |
8c500701 ILT |
1867 | } |
1868 | } | |
ead1e424 ILT |
1869 | } |
1870 | } | |
1871 | ||
8851ecca ILT |
1872 | const Target& target = parameters->target(); |
1873 | if (!target.has_make_symbol()) | |
86f2e683 ILT |
1874 | sym = new Sized_symbol<size>(); |
1875 | else | |
ead1e424 | 1876 | { |
029ba973 ILT |
1877 | Sized_target<size, big_endian>* sized_target = |
1878 | parameters->sized_target<size, big_endian>(); | |
dc1c8a16 CC |
1879 | sym = sized_target->make_symbol(*pname, elfcpp::STT_NOTYPE, |
1880 | NULL, elfcpp::SHN_UNDEF, 0); | |
86f2e683 ILT |
1881 | if (sym == NULL) |
1882 | return NULL; | |
1883 | } | |
ead1e424 | 1884 | |
86f2e683 ILT |
1885 | if (add_to_table) |
1886 | add_loc->second = sym; | |
1887 | else | |
1888 | gold_assert(oldsym != NULL); | |
ead1e424 | 1889 | |
8c500701 ILT |
1890 | if (add_def_to_table) |
1891 | add_def_loc->second = sym; | |
1892 | ||
7d1a9ebb | 1893 | *poldsym = this->get_sized_symbol<size>(oldsym); |
ead1e424 ILT |
1894 | |
1895 | return sym; | |
1896 | } | |
1897 | ||
1898 | // Define a symbol based on an Output_data. | |
1899 | ||
14b31740 | 1900 | Symbol* |
2ea97941 ILT |
1901 | Symbol_table::define_in_output_data(const char* name, |
1902 | const char* version, | |
99fff23b | 1903 | Defined defined, |
9b07f471 | 1904 | Output_data* od, |
2ea97941 ILT |
1905 | uint64_t value, |
1906 | uint64_t symsize, | |
9b07f471 ILT |
1907 | elfcpp::STT type, |
1908 | elfcpp::STB binding, | |
ead1e424 ILT |
1909 | elfcpp::STV visibility, |
1910 | unsigned char nonvis, | |
2ea97941 | 1911 | bool offset_is_from_end, |
ead1e424 ILT |
1912 | bool only_if_ref) |
1913 | { | |
8851ecca | 1914 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
1915 | { |
1916 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 1917 | return this->do_define_in_output_data<32>(name, version, defined, od, |
2ea97941 | 1918 | value, symsize, type, binding, |
86f2e683 | 1919 | visibility, nonvis, |
2ea97941 | 1920 | offset_is_from_end, |
86f2e683 ILT |
1921 | only_if_ref); |
1922 | #else | |
1923 | gold_unreachable(); | |
1924 | #endif | |
1925 | } | |
8851ecca | 1926 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
1927 | { |
1928 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 1929 | return this->do_define_in_output_data<64>(name, version, defined, od, |
2ea97941 | 1930 | value, symsize, type, binding, |
86f2e683 | 1931 | visibility, nonvis, |
2ea97941 | 1932 | offset_is_from_end, |
86f2e683 ILT |
1933 | only_if_ref); |
1934 | #else | |
1935 | gold_unreachable(); | |
1936 | #endif | |
1937 | } | |
ead1e424 | 1938 | else |
a3ad94ed | 1939 | gold_unreachable(); |
ead1e424 ILT |
1940 | } |
1941 | ||
1942 | // Define a symbol in an Output_data, sized version. | |
1943 | ||
1944 | template<int size> | |
14b31740 | 1945 | Sized_symbol<size>* |
ead1e424 | 1946 | Symbol_table::do_define_in_output_data( |
2ea97941 ILT |
1947 | const char* name, |
1948 | const char* version, | |
99fff23b | 1949 | Defined defined, |
ead1e424 | 1950 | Output_data* od, |
2ea97941 ILT |
1951 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
1952 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
1953 | elfcpp::STT type, |
1954 | elfcpp::STB binding, | |
1955 | elfcpp::STV visibility, | |
1956 | unsigned char nonvis, | |
2ea97941 | 1957 | bool offset_is_from_end, |
ead1e424 ILT |
1958 | bool only_if_ref) |
1959 | { | |
1960 | Sized_symbol<size>* sym; | |
86f2e683 | 1961 | Sized_symbol<size>* oldsym; |
8c500701 | 1962 | bool resolve_oldsym; |
ead1e424 | 1963 | |
8851ecca | 1964 | if (parameters->target().is_big_endian()) |
193a53d9 ILT |
1965 | { |
1966 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 1967 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
1968 | only_if_ref, &oldsym, |
1969 | &resolve_oldsym); | |
193a53d9 ILT |
1970 | #else |
1971 | gold_unreachable(); | |
1972 | #endif | |
1973 | } | |
ead1e424 | 1974 | else |
193a53d9 ILT |
1975 | { |
1976 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 1977 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
1978 | only_if_ref, &oldsym, |
1979 | &resolve_oldsym); | |
193a53d9 ILT |
1980 | #else |
1981 | gold_unreachable(); | |
1982 | #endif | |
1983 | } | |
ead1e424 ILT |
1984 | |
1985 | if (sym == NULL) | |
14b31740 | 1986 | return NULL; |
ead1e424 | 1987 | |
2ea97941 | 1988 | sym->init_output_data(name, version, od, value, symsize, type, binding, |
5146f448 CC |
1989 | visibility, nonvis, offset_is_from_end, |
1990 | defined == PREDEFINED); | |
14b31740 | 1991 | |
e5756efb | 1992 | if (oldsym == NULL) |
55a93433 ILT |
1993 | { |
1994 | if (binding == elfcpp::STB_LOCAL | |
2ea97941 | 1995 | || this->version_script_.symbol_is_local(name)) |
55a93433 | 1996 | this->force_local(sym); |
2ea97941 | 1997 | else if (version != NULL) |
75517b77 | 1998 | sym->set_is_default(); |
55a93433 ILT |
1999 | return sym; |
2000 | } | |
86f2e683 | 2001 | |
62855347 | 2002 | if (Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 2003 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2004 | |
2005 | if (resolve_oldsym) | |
2006 | return sym; | |
2007 | else | |
2008 | { | |
db1ff028 CC |
2009 | if (defined == PREDEFINED |
2010 | && (binding == elfcpp::STB_LOCAL | |
2011 | || this->version_script_.symbol_is_local(name))) | |
5417c94d | 2012 | this->force_local(oldsym); |
8c500701 ILT |
2013 | delete sym; |
2014 | return oldsym; | |
2015 | } | |
ead1e424 ILT |
2016 | } |
2017 | ||
2018 | // Define a symbol based on an Output_segment. | |
2019 | ||
14b31740 | 2020 | Symbol* |
2ea97941 | 2021 | Symbol_table::define_in_output_segment(const char* name, |
99fff23b ILT |
2022 | const char* version, |
2023 | Defined defined, | |
2024 | Output_segment* os, | |
2ea97941 ILT |
2025 | uint64_t value, |
2026 | uint64_t symsize, | |
9b07f471 ILT |
2027 | elfcpp::STT type, |
2028 | elfcpp::STB binding, | |
ead1e424 ILT |
2029 | elfcpp::STV visibility, |
2030 | unsigned char nonvis, | |
2ea97941 | 2031 | Symbol::Segment_offset_base offset_base, |
ead1e424 ILT |
2032 | bool only_if_ref) |
2033 | { | |
8851ecca | 2034 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
2035 | { |
2036 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 2037 | return this->do_define_in_output_segment<32>(name, version, defined, os, |
2ea97941 | 2038 | value, symsize, type, |
86f2e683 | 2039 | binding, visibility, nonvis, |
2ea97941 | 2040 | offset_base, only_if_ref); |
86f2e683 ILT |
2041 | #else |
2042 | gold_unreachable(); | |
2043 | #endif | |
2044 | } | |
8851ecca | 2045 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
2046 | { |
2047 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 2048 | return this->do_define_in_output_segment<64>(name, version, defined, os, |
2ea97941 | 2049 | value, symsize, type, |
86f2e683 | 2050 | binding, visibility, nonvis, |
2ea97941 | 2051 | offset_base, only_if_ref); |
86f2e683 ILT |
2052 | #else |
2053 | gold_unreachable(); | |
2054 | #endif | |
2055 | } | |
ead1e424 | 2056 | else |
a3ad94ed | 2057 | gold_unreachable(); |
ead1e424 ILT |
2058 | } |
2059 | ||
2060 | // Define a symbol in an Output_segment, sized version. | |
2061 | ||
2062 | template<int size> | |
14b31740 | 2063 | Sized_symbol<size>* |
ead1e424 | 2064 | Symbol_table::do_define_in_output_segment( |
2ea97941 ILT |
2065 | const char* name, |
2066 | const char* version, | |
99fff23b | 2067 | Defined defined, |
ead1e424 | 2068 | Output_segment* os, |
2ea97941 ILT |
2069 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2070 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
2071 | elfcpp::STT type, |
2072 | elfcpp::STB binding, | |
2073 | elfcpp::STV visibility, | |
2074 | unsigned char nonvis, | |
2ea97941 | 2075 | Symbol::Segment_offset_base offset_base, |
ead1e424 ILT |
2076 | bool only_if_ref) |
2077 | { | |
2078 | Sized_symbol<size>* sym; | |
86f2e683 | 2079 | Sized_symbol<size>* oldsym; |
8c500701 | 2080 | bool resolve_oldsym; |
ead1e424 | 2081 | |
8851ecca | 2082 | if (parameters->target().is_big_endian()) |
9025d29d ILT |
2083 | { |
2084 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 2085 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
2086 | only_if_ref, &oldsym, |
2087 | &resolve_oldsym); | |
9025d29d ILT |
2088 | #else |
2089 | gold_unreachable(); | |
2090 | #endif | |
2091 | } | |
ead1e424 | 2092 | else |
9025d29d ILT |
2093 | { |
2094 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 2095 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
2096 | only_if_ref, &oldsym, |
2097 | &resolve_oldsym); | |
9025d29d ILT |
2098 | #else |
2099 | gold_unreachable(); | |
2100 | #endif | |
2101 | } | |
ead1e424 ILT |
2102 | |
2103 | if (sym == NULL) | |
14b31740 | 2104 | return NULL; |
ead1e424 | 2105 | |
2ea97941 | 2106 | sym->init_output_segment(name, version, os, value, symsize, type, binding, |
5146f448 CC |
2107 | visibility, nonvis, offset_base, |
2108 | defined == PREDEFINED); | |
14b31740 | 2109 | |
e5756efb | 2110 | if (oldsym == NULL) |
55a93433 ILT |
2111 | { |
2112 | if (binding == elfcpp::STB_LOCAL | |
2ea97941 | 2113 | || this->version_script_.symbol_is_local(name)) |
55a93433 | 2114 | this->force_local(sym); |
2ea97941 | 2115 | else if (version != NULL) |
75517b77 | 2116 | sym->set_is_default(); |
55a93433 ILT |
2117 | return sym; |
2118 | } | |
86f2e683 | 2119 | |
62855347 | 2120 | if (Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 2121 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2122 | |
2123 | if (resolve_oldsym) | |
2124 | return sym; | |
2125 | else | |
2126 | { | |
5417c94d CC |
2127 | if (binding == elfcpp::STB_LOCAL |
2128 | || this->version_script_.symbol_is_local(name)) | |
2129 | this->force_local(oldsym); | |
8c500701 ILT |
2130 | delete sym; |
2131 | return oldsym; | |
2132 | } | |
ead1e424 ILT |
2133 | } |
2134 | ||
2135 | // Define a special symbol with a constant value. It is a multiple | |
2136 | // definition error if this symbol is already defined. | |
2137 | ||
14b31740 | 2138 | Symbol* |
2ea97941 ILT |
2139 | Symbol_table::define_as_constant(const char* name, |
2140 | const char* version, | |
99fff23b | 2141 | Defined defined, |
2ea97941 ILT |
2142 | uint64_t value, |
2143 | uint64_t symsize, | |
9b07f471 ILT |
2144 | elfcpp::STT type, |
2145 | elfcpp::STB binding, | |
2146 | elfcpp::STV visibility, | |
2147 | unsigned char nonvis, | |
caa9d5d9 ILT |
2148 | bool only_if_ref, |
2149 | bool force_override) | |
ead1e424 | 2150 | { |
8851ecca | 2151 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
2152 | { |
2153 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 2154 | return this->do_define_as_constant<32>(name, version, defined, value, |
2ea97941 | 2155 | symsize, type, binding, |
caa9d5d9 ILT |
2156 | visibility, nonvis, only_if_ref, |
2157 | force_override); | |
86f2e683 ILT |
2158 | #else |
2159 | gold_unreachable(); | |
2160 | #endif | |
2161 | } | |
8851ecca | 2162 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
2163 | { |
2164 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 2165 | return this->do_define_as_constant<64>(name, version, defined, value, |
2ea97941 | 2166 | symsize, type, binding, |
caa9d5d9 ILT |
2167 | visibility, nonvis, only_if_ref, |
2168 | force_override); | |
86f2e683 ILT |
2169 | #else |
2170 | gold_unreachable(); | |
2171 | #endif | |
2172 | } | |
ead1e424 | 2173 | else |
a3ad94ed | 2174 | gold_unreachable(); |
ead1e424 ILT |
2175 | } |
2176 | ||
2177 | // Define a symbol as a constant, sized version. | |
2178 | ||
2179 | template<int size> | |
14b31740 | 2180 | Sized_symbol<size>* |
ead1e424 | 2181 | Symbol_table::do_define_as_constant( |
2ea97941 ILT |
2182 | const char* name, |
2183 | const char* version, | |
99fff23b | 2184 | Defined defined, |
2ea97941 ILT |
2185 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2186 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
2187 | elfcpp::STT type, |
2188 | elfcpp::STB binding, | |
2189 | elfcpp::STV visibility, | |
2190 | unsigned char nonvis, | |
caa9d5d9 ILT |
2191 | bool only_if_ref, |
2192 | bool force_override) | |
ead1e424 ILT |
2193 | { |
2194 | Sized_symbol<size>* sym; | |
86f2e683 | 2195 | Sized_symbol<size>* oldsym; |
8c500701 | 2196 | bool resolve_oldsym; |
ead1e424 | 2197 | |
8851ecca | 2198 | if (parameters->target().is_big_endian()) |
9025d29d ILT |
2199 | { |
2200 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 2201 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
2202 | only_if_ref, &oldsym, |
2203 | &resolve_oldsym); | |
9025d29d ILT |
2204 | #else |
2205 | gold_unreachable(); | |
2206 | #endif | |
2207 | } | |
ead1e424 | 2208 | else |
9025d29d ILT |
2209 | { |
2210 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 2211 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
2212 | only_if_ref, &oldsym, |
2213 | &resolve_oldsym); | |
9025d29d ILT |
2214 | #else |
2215 | gold_unreachable(); | |
2216 | #endif | |
2217 | } | |
ead1e424 ILT |
2218 | |
2219 | if (sym == NULL) | |
14b31740 | 2220 | return NULL; |
ead1e424 | 2221 | |
2ea97941 | 2222 | sym->init_constant(name, version, value, symsize, type, binding, visibility, |
5146f448 | 2223 | nonvis, defined == PREDEFINED); |
14b31740 | 2224 | |
e5756efb | 2225 | if (oldsym == NULL) |
55a93433 | 2226 | { |
686c8caf ILT |
2227 | // Version symbols are absolute symbols with name == version. |
2228 | // We don't want to force them to be local. | |
2ea97941 ILT |
2229 | if ((version == NULL |
2230 | || name != version | |
2231 | || value != 0) | |
686c8caf | 2232 | && (binding == elfcpp::STB_LOCAL |
2ea97941 | 2233 | || this->version_script_.symbol_is_local(name))) |
55a93433 | 2234 | this->force_local(sym); |
2ea97941 ILT |
2235 | else if (version != NULL |
2236 | && (name != version || value != 0)) | |
75517b77 | 2237 | sym->set_is_default(); |
55a93433 ILT |
2238 | return sym; |
2239 | } | |
86f2e683 | 2240 | |
99fff23b | 2241 | if (force_override |
62855347 | 2242 | || Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 2243 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2244 | |
2245 | if (resolve_oldsym) | |
2246 | return sym; | |
2247 | else | |
2248 | { | |
5417c94d CC |
2249 | if (binding == elfcpp::STB_LOCAL |
2250 | || this->version_script_.symbol_is_local(name)) | |
2251 | this->force_local(oldsym); | |
8c500701 ILT |
2252 | delete sym; |
2253 | return oldsym; | |
2254 | } | |
ead1e424 ILT |
2255 | } |
2256 | ||
2257 | // Define a set of symbols in output sections. | |
2258 | ||
2259 | void | |
9b07f471 | 2260 | Symbol_table::define_symbols(const Layout* layout, int count, |
a445fddf ILT |
2261 | const Define_symbol_in_section* p, |
2262 | bool only_if_ref) | |
ead1e424 ILT |
2263 | { |
2264 | for (int i = 0; i < count; ++i, ++p) | |
2265 | { | |
2266 | Output_section* os = layout->find_output_section(p->output_section); | |
2267 | if (os != NULL) | |
99fff23b | 2268 | this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value, |
14b31740 ILT |
2269 | p->size, p->type, p->binding, |
2270 | p->visibility, p->nonvis, | |
a445fddf ILT |
2271 | p->offset_is_from_end, |
2272 | only_if_ref || p->only_if_ref); | |
ead1e424 | 2273 | else |
99fff23b ILT |
2274 | this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size, |
2275 | p->type, p->binding, p->visibility, p->nonvis, | |
caa9d5d9 ILT |
2276 | only_if_ref || p->only_if_ref, |
2277 | false); | |
ead1e424 ILT |
2278 | } |
2279 | } | |
2280 | ||
2281 | // Define a set of symbols in output segments. | |
2282 | ||
2283 | void | |
9b07f471 | 2284 | Symbol_table::define_symbols(const Layout* layout, int count, |
a445fddf ILT |
2285 | const Define_symbol_in_segment* p, |
2286 | bool only_if_ref) | |
ead1e424 ILT |
2287 | { |
2288 | for (int i = 0; i < count; ++i, ++p) | |
2289 | { | |
2290 | Output_segment* os = layout->find_output_segment(p->segment_type, | |
2291 | p->segment_flags_set, | |
2292 | p->segment_flags_clear); | |
2293 | if (os != NULL) | |
99fff23b | 2294 | this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value, |
14b31740 ILT |
2295 | p->size, p->type, p->binding, |
2296 | p->visibility, p->nonvis, | |
a445fddf ILT |
2297 | p->offset_base, |
2298 | only_if_ref || p->only_if_ref); | |
ead1e424 | 2299 | else |
99fff23b ILT |
2300 | this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size, |
2301 | p->type, p->binding, p->visibility, p->nonvis, | |
caa9d5d9 ILT |
2302 | only_if_ref || p->only_if_ref, |
2303 | false); | |
ead1e424 ILT |
2304 | } |
2305 | } | |
2306 | ||
46fe1623 ILT |
2307 | // Define CSYM using a COPY reloc. POSD is the Output_data where the |
2308 | // symbol should be defined--typically a .dyn.bss section. VALUE is | |
2309 | // the offset within POSD. | |
2310 | ||
2311 | template<int size> | |
2312 | void | |
fe8718a4 | 2313 | Symbol_table::define_with_copy_reloc( |
fe8718a4 ILT |
2314 | Sized_symbol<size>* csym, |
2315 | Output_data* posd, | |
2ea97941 | 2316 | typename elfcpp::Elf_types<size>::Elf_Addr value) |
46fe1623 ILT |
2317 | { |
2318 | gold_assert(csym->is_from_dynobj()); | |
2319 | gold_assert(!csym->is_copied_from_dynobj()); | |
2ea97941 ILT |
2320 | Object* object = csym->object(); |
2321 | gold_assert(object->is_dynamic()); | |
2322 | Dynobj* dynobj = static_cast<Dynobj*>(object); | |
46fe1623 ILT |
2323 | |
2324 | // Our copied variable has to override any variable in a shared | |
2325 | // library. | |
2326 | elfcpp::STB binding = csym->binding(); | |
2327 | if (binding == elfcpp::STB_WEAK) | |
2328 | binding = elfcpp::STB_GLOBAL; | |
2329 | ||
99fff23b | 2330 | this->define_in_output_data(csym->name(), csym->version(), COPY, |
2ea97941 | 2331 | posd, value, csym->symsize(), |
46fe1623 ILT |
2332 | csym->type(), binding, |
2333 | csym->visibility(), csym->nonvis(), | |
2334 | false, false); | |
2335 | ||
2336 | csym->set_is_copied_from_dynobj(); | |
2337 | csym->set_needs_dynsym_entry(); | |
2338 | ||
2339 | this->copied_symbol_dynobjs_[csym] = dynobj; | |
2340 | ||
2341 | // We have now defined all aliases, but we have not entered them all | |
2342 | // in the copied_symbol_dynobjs_ map. | |
2343 | if (csym->has_alias()) | |
2344 | { | |
2345 | Symbol* sym = csym; | |
2346 | while (true) | |
2347 | { | |
2348 | sym = this->weak_aliases_[sym]; | |
2349 | if (sym == csym) | |
2350 | break; | |
2351 | gold_assert(sym->output_data() == posd); | |
2352 | ||
2353 | sym->set_is_copied_from_dynobj(); | |
2354 | this->copied_symbol_dynobjs_[sym] = dynobj; | |
2355 | } | |
2356 | } | |
2357 | } | |
2358 | ||
2359 | // SYM is defined using a COPY reloc. Return the dynamic object where | |
2360 | // the original definition was found. | |
2361 | ||
2362 | Dynobj* | |
2363 | Symbol_table::get_copy_source(const Symbol* sym) const | |
2364 | { | |
2365 | gold_assert(sym->is_copied_from_dynobj()); | |
2366 | Copied_symbol_dynobjs::const_iterator p = | |
2367 | this->copied_symbol_dynobjs_.find(sym); | |
2368 | gold_assert(p != this->copied_symbol_dynobjs_.end()); | |
2369 | return p->second; | |
2370 | } | |
2371 | ||
f3e9c5c5 ILT |
2372 | // Add any undefined symbols named on the command line. |
2373 | ||
2374 | void | |
88a4108b | 2375 | Symbol_table::add_undefined_symbols_from_command_line(Layout* layout) |
f3e9c5c5 | 2376 | { |
88a4108b ILT |
2377 | if (parameters->options().any_undefined() |
2378 | || layout->script_options()->any_unreferenced()) | |
f3e9c5c5 ILT |
2379 | { |
2380 | if (parameters->target().get_size() == 32) | |
2381 | { | |
5adf9721 | 2382 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
88a4108b | 2383 | this->do_add_undefined_symbols_from_command_line<32>(layout); |
f3e9c5c5 ILT |
2384 | #else |
2385 | gold_unreachable(); | |
2386 | #endif | |
2387 | } | |
2388 | else if (parameters->target().get_size() == 64) | |
2389 | { | |
2390 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
88a4108b | 2391 | this->do_add_undefined_symbols_from_command_line<64>(layout); |
f3e9c5c5 ILT |
2392 | #else |
2393 | gold_unreachable(); | |
2394 | #endif | |
2395 | } | |
2396 | else | |
2397 | gold_unreachable(); | |
2398 | } | |
2399 | } | |
2400 | ||
2401 | template<int size> | |
2402 | void | |
88a4108b | 2403 | Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout) |
f3e9c5c5 ILT |
2404 | { |
2405 | for (options::String_set::const_iterator p = | |
2406 | parameters->options().undefined_begin(); | |
2407 | p != parameters->options().undefined_end(); | |
2408 | ++p) | |
88a4108b | 2409 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); |
f3e9c5c5 | 2410 | |
31821be0 CC |
2411 | for (options::String_set::const_iterator p = |
2412 | parameters->options().export_dynamic_symbol_begin(); | |
2413 | p != parameters->options().export_dynamic_symbol_end(); | |
2414 | ++p) | |
2415 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); | |
2416 | ||
88a4108b ILT |
2417 | for (Script_options::referenced_const_iterator p = |
2418 | layout->script_options()->referenced_begin(); | |
2419 | p != layout->script_options()->referenced_end(); | |
2420 | ++p) | |
2421 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); | |
2422 | } | |
2423 | ||
2424 | template<int size> | |
2425 | void | |
2426 | Symbol_table::add_undefined_symbol_from_command_line(const char* name) | |
2427 | { | |
2428 | if (this->lookup(name) != NULL) | |
2429 | return; | |
f3e9c5c5 | 2430 | |
88a4108b | 2431 | const char* version = NULL; |
f3e9c5c5 | 2432 | |
88a4108b ILT |
2433 | Sized_symbol<size>* sym; |
2434 | Sized_symbol<size>* oldsym; | |
2435 | bool resolve_oldsym; | |
2436 | if (parameters->target().is_big_endian()) | |
2437 | { | |
f3e9c5c5 | 2438 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) |
88a4108b ILT |
2439 | sym = this->define_special_symbol<size, true>(&name, &version, |
2440 | false, &oldsym, | |
2441 | &resolve_oldsym); | |
f3e9c5c5 | 2442 | #else |
88a4108b | 2443 | gold_unreachable(); |
f3e9c5c5 | 2444 | #endif |
88a4108b ILT |
2445 | } |
2446 | else | |
2447 | { | |
f3e9c5c5 | 2448 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) |
88a4108b ILT |
2449 | sym = this->define_special_symbol<size, false>(&name, &version, |
2450 | false, &oldsym, | |
2451 | &resolve_oldsym); | |
f3e9c5c5 | 2452 | #else |
88a4108b | 2453 | gold_unreachable(); |
f3e9c5c5 | 2454 | #endif |
88a4108b | 2455 | } |
f3e9c5c5 | 2456 | |
88a4108b | 2457 | gold_assert(oldsym == NULL); |
f3e9c5c5 | 2458 | |
dc1c8a16 | 2459 | sym->init_undefined(name, version, 0, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
88a4108b ILT |
2460 | elfcpp::STV_DEFAULT, 0); |
2461 | ++this->saw_undefined_; | |
f3e9c5c5 ILT |
2462 | } |
2463 | ||
a3ad94ed ILT |
2464 | // Set the dynamic symbol indexes. INDEX is the index of the first |
2465 | // global dynamic symbol. Pointers to the symbols are stored into the | |
2466 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
2467 | // updated dynamic symbol index. | |
2468 | ||
2469 | unsigned int | |
9b07f471 | 2470 | Symbol_table::set_dynsym_indexes(unsigned int index, |
a3ad94ed | 2471 | std::vector<Symbol*>* syms, |
14b31740 ILT |
2472 | Stringpool* dynpool, |
2473 | Versions* versions) | |
a3ad94ed | 2474 | { |
32e2b61d AM |
2475 | std::vector<Symbol*> as_needed_sym; |
2476 | ||
98ff9231 CC |
2477 | // Allow a target to set dynsym indexes. |
2478 | if (parameters->target().has_custom_set_dynsym_indexes()) | |
2479 | { | |
2480 | std::vector<Symbol*> dyn_symbols; | |
2481 | for (Symbol_table_type::iterator p = this->table_.begin(); | |
2482 | p != this->table_.end(); | |
2483 | ++p) | |
2484 | { | |
2485 | Symbol* sym = p->second; | |
2486 | if (!sym->should_add_dynsym_entry(this)) | |
2487 | sym->set_dynsym_index(-1U); | |
2488 | else | |
2489 | dyn_symbols.push_back(sym); | |
2490 | } | |
2491 | ||
2492 | return parameters->target().set_dynsym_indexes(&dyn_symbols, index, syms, | |
2493 | dynpool, versions, this); | |
2494 | } | |
2495 | ||
a3ad94ed ILT |
2496 | for (Symbol_table_type::iterator p = this->table_.begin(); |
2497 | p != this->table_.end(); | |
2498 | ++p) | |
2499 | { | |
2500 | Symbol* sym = p->second; | |
16649710 ILT |
2501 | |
2502 | // Note that SYM may already have a dynamic symbol index, since | |
2503 | // some symbols appear more than once in the symbol table, with | |
2504 | // and without a version. | |
2505 | ||
ce97fa81 | 2506 | if (!sym->should_add_dynsym_entry(this)) |
16649710 ILT |
2507 | sym->set_dynsym_index(-1U); |
2508 | else if (!sym->has_dynsym_index()) | |
a3ad94ed ILT |
2509 | { |
2510 | sym->set_dynsym_index(index); | |
2511 | ++index; | |
2512 | syms->push_back(sym); | |
cfd73a4e | 2513 | dynpool->add(sym->name(), false, NULL); |
14b31740 | 2514 | |
594c8e5e | 2515 | // If the symbol is defined in a dynamic object and is |
32e2b61d AM |
2516 | // referenced strongly in a regular object, then mark the |
2517 | // dynamic object as needed. This is used to implement | |
2518 | // --as-needed. | |
2519 | if (sym->is_from_dynobj() | |
2520 | && sym->in_reg() | |
2521 | && !sym->is_undef_binding_weak()) | |
594c8e5e | 2522 | sym->object()->set_is_needed(); |
32e2b61d AM |
2523 | |
2524 | // Record any version information, except those from | |
2525 | // as-needed libraries not seen to be needed. Note that the | |
2526 | // is_needed state for such libraries can change in this loop. | |
2527 | if (sym->version() != NULL) | |
2528 | { | |
2529 | if (!sym->is_from_dynobj() | |
2530 | || !sym->object()->as_needed() | |
2531 | || sym->object()->is_needed()) | |
2532 | versions->record_version(this, dynpool, sym); | |
2533 | else | |
2534 | as_needed_sym.push_back(sym); | |
2535 | } | |
a3ad94ed ILT |
2536 | } |
2537 | } | |
2538 | ||
32e2b61d AM |
2539 | // Process version information for symbols from as-needed libraries. |
2540 | for (std::vector<Symbol*>::iterator p = as_needed_sym.begin(); | |
2541 | p != as_needed_sym.end(); | |
2542 | ++p) | |
2543 | { | |
2544 | Symbol* sym = *p; | |
2545 | ||
2546 | if (sym->object()->is_needed()) | |
2547 | versions->record_version(this, dynpool, sym); | |
2548 | else | |
2549 | sym->clear_version(); | |
2550 | } | |
2551 | ||
14b31740 ILT |
2552 | // Finish up the versions. In some cases this may add new dynamic |
2553 | // symbols. | |
9b07f471 | 2554 | index = versions->finalize(this, index, syms); |
14b31740 | 2555 | |
dc1c8a16 CC |
2556 | // Process target-specific symbols. |
2557 | for (std::vector<Symbol*>::iterator p = this->target_symbols_.begin(); | |
2558 | p != this->target_symbols_.end(); | |
2559 | ++p) | |
2560 | { | |
2561 | (*p)->set_dynsym_index(index); | |
2562 | ++index; | |
2563 | syms->push_back(*p); | |
2564 | dynpool->add((*p)->name(), false, NULL); | |
2565 | } | |
2566 | ||
a3ad94ed ILT |
2567 | return index; |
2568 | } | |
2569 | ||
c06b7b0b | 2570 | // Set the final values for all the symbols. The index of the first |
55a93433 ILT |
2571 | // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the |
2572 | // file offset OFF. Add their names to POOL. Return the new file | |
2573 | // offset. Update *PLOCAL_SYMCOUNT if necessary. | |
54dc6425 | 2574 | |
75f65a3e | 2575 | off_t |
55a93433 ILT |
2576 | Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index, |
2577 | size_t dyncount, Stringpool* pool, | |
ca09d69a | 2578 | unsigned int* plocal_symcount) |
54dc6425 | 2579 | { |
f6ce93d6 ILT |
2580 | off_t ret; |
2581 | ||
55a93433 ILT |
2582 | gold_assert(*plocal_symcount != 0); |
2583 | this->first_global_index_ = *plocal_symcount; | |
c06b7b0b | 2584 | |
16649710 ILT |
2585 | this->dynamic_offset_ = dynoff; |
2586 | this->first_dynamic_global_index_ = dyn_global_index; | |
2587 | this->dynamic_count_ = dyncount; | |
2588 | ||
8851ecca | 2589 | if (parameters->target().get_size() == 32) |
9025d29d ILT |
2590 | { |
2591 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE) | |
55a93433 | 2592 | ret = this->sized_finalize<32>(off, pool, plocal_symcount); |
9025d29d ILT |
2593 | #else |
2594 | gold_unreachable(); | |
2595 | #endif | |
2596 | } | |
8851ecca | 2597 | else if (parameters->target().get_size() == 64) |
9025d29d ILT |
2598 | { |
2599 | #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE) | |
55a93433 | 2600 | ret = this->sized_finalize<64>(off, pool, plocal_symcount); |
9025d29d ILT |
2601 | #else |
2602 | gold_unreachable(); | |
2603 | #endif | |
2604 | } | |
61ba1cf9 | 2605 | else |
a3ad94ed | 2606 | gold_unreachable(); |
f6ce93d6 ILT |
2607 | |
2608 | // Now that we have the final symbol table, we can reliably note | |
2609 | // which symbols should get warnings. | |
cb295612 | 2610 | this->warnings_.note_warnings(this); |
f6ce93d6 ILT |
2611 | |
2612 | return ret; | |
75f65a3e ILT |
2613 | } |
2614 | ||
55a93433 ILT |
2615 | // SYM is going into the symbol table at *PINDEX. Add the name to |
2616 | // POOL, update *PINDEX and *POFF. | |
2617 | ||
2618 | template<int size> | |
2619 | void | |
2620 | Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool, | |
2621 | unsigned int* pindex, off_t* poff) | |
2622 | { | |
2623 | sym->set_symtab_index(*pindex); | |
6d1c4efb ILT |
2624 | if (sym->version() == NULL || !parameters->options().relocatable()) |
2625 | pool->add(sym->name(), false, NULL); | |
2626 | else | |
2627 | pool->add(sym->versioned_name(), true, NULL); | |
55a93433 ILT |
2628 | ++*pindex; |
2629 | *poff += elfcpp::Elf_sizes<size>::sym_size; | |
2630 | } | |
2631 | ||
ead1e424 ILT |
2632 | // Set the final value for all the symbols. This is called after |
2633 | // Layout::finalize, so all the output sections have their final | |
2634 | // address. | |
75f65a3e ILT |
2635 | |
2636 | template<int size> | |
2637 | off_t | |
55a93433 ILT |
2638 | Symbol_table::sized_finalize(off_t off, Stringpool* pool, |
2639 | unsigned int* plocal_symcount) | |
75f65a3e | 2640 | { |
ead1e424 | 2641 | off = align_address(off, size >> 3); |
75f65a3e ILT |
2642 | this->offset_ = off; |
2643 | ||
55a93433 ILT |
2644 | unsigned int index = *plocal_symcount; |
2645 | const unsigned int orig_index = index; | |
c06b7b0b | 2646 | |
55a93433 ILT |
2647 | // First do all the symbols which have been forced to be local, as |
2648 | // they must appear before all global symbols. | |
2649 | for (Forced_locals::iterator p = this->forced_locals_.begin(); | |
2650 | p != this->forced_locals_.end(); | |
2651 | ++p) | |
2652 | { | |
2653 | Symbol* sym = *p; | |
2654 | gold_assert(sym->is_forced_local()); | |
2655 | if (this->sized_finalize_symbol<size>(sym)) | |
2656 | { | |
2657 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
2658 | ++*plocal_symcount; | |
2659 | } | |
2660 | } | |
2661 | ||
2662 | // Now do all the remaining symbols. | |
c06b7b0b ILT |
2663 | for (Symbol_table_type::iterator p = this->table_.begin(); |
2664 | p != this->table_.end(); | |
2665 | ++p) | |
54dc6425 | 2666 | { |
55a93433 ILT |
2667 | Symbol* sym = p->second; |
2668 | if (this->sized_finalize_symbol<size>(sym)) | |
2669 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
2670 | } | |
54dc6425 | 2671 | |
dc1c8a16 CC |
2672 | // Now do target-specific symbols. |
2673 | for (std::vector<Symbol*>::iterator p = this->target_symbols_.begin(); | |
2674 | p != this->target_symbols_.end(); | |
2675 | ++p) | |
2676 | { | |
2677 | this->add_to_final_symtab<size>(*p, pool, &index, &off); | |
2678 | } | |
2679 | ||
55a93433 | 2680 | this->output_count_ = index - orig_index; |
a3ad94ed | 2681 | |
55a93433 ILT |
2682 | return off; |
2683 | } | |
75f65a3e | 2684 | |
c0a62865 DK |
2685 | // Compute the final value of SYM and store status in location PSTATUS. |
2686 | // During relaxation, this may be called multiple times for a symbol to | |
2687 | // compute its would-be final value in each relaxation pass. | |
008db82e | 2688 | |
55a93433 | 2689 | template<int size> |
c0a62865 DK |
2690 | typename Sized_symbol<size>::Value_type |
2691 | Symbol_table::compute_final_value( | |
2692 | const Sized_symbol<size>* sym, | |
2693 | Compute_final_value_status* pstatus) const | |
55a93433 | 2694 | { |
ef9beddf | 2695 | typedef typename Sized_symbol<size>::Value_type Value_type; |
2ea97941 | 2696 | Value_type value; |
ead1e424 | 2697 | |
55a93433 ILT |
2698 | switch (sym->source()) |
2699 | { | |
2700 | case Symbol::FROM_OBJECT: | |
2701 | { | |
d491d34e | 2702 | bool is_ordinary; |
2ea97941 | 2703 | unsigned int shndx = sym->shndx(&is_ordinary); |
ead1e424 | 2704 | |
d491d34e | 2705 | if (!is_ordinary |
2ea97941 ILT |
2706 | && shndx != elfcpp::SHN_ABS |
2707 | && !Symbol::is_common_shndx(shndx)) | |
55a93433 | 2708 | { |
c0a62865 DK |
2709 | *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION; |
2710 | return 0; | |
ead1e424 | 2711 | } |
ead1e424 | 2712 | |
55a93433 ILT |
2713 | Object* symobj = sym->object(); |
2714 | if (symobj->is_dynamic()) | |
ead1e424 | 2715 | { |
2ea97941 ILT |
2716 | value = 0; |
2717 | shndx = elfcpp::SHN_UNDEF; | |
ead1e424 | 2718 | } |
89fc3421 CC |
2719 | else if (symobj->pluginobj() != NULL) |
2720 | { | |
2ea97941 ILT |
2721 | value = 0; |
2722 | shndx = elfcpp::SHN_UNDEF; | |
89fc3421 | 2723 | } |
2ea97941 ILT |
2724 | else if (shndx == elfcpp::SHN_UNDEF) |
2725 | value = 0; | |
d491d34e | 2726 | else if (!is_ordinary |
2ea97941 ILT |
2727 | && (shndx == elfcpp::SHN_ABS |
2728 | || Symbol::is_common_shndx(shndx))) | |
2729 | value = sym->value(); | |
55a93433 | 2730 | else |
ead1e424 | 2731 | { |
55a93433 | 2732 | Relobj* relobj = static_cast<Relobj*>(symobj); |
2ea97941 | 2733 | Output_section* os = relobj->output_section(shndx); |
55a93433 | 2734 | |
2ea97941 | 2735 | if (this->is_section_folded(relobj, shndx)) |
ef15dade ST |
2736 | { |
2737 | gold_assert(os == NULL); | |
2738 | // Get the os of the section it is folded onto. | |
2739 | Section_id folded = this->icf_->get_folded_section(relobj, | |
2ea97941 | 2740 | shndx); |
ef15dade ST |
2741 | gold_assert(folded.first != NULL); |
2742 | Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first); | |
d6344fb5 DK |
2743 | unsigned folded_shndx = folded.second; |
2744 | ||
2745 | os = folded_obj->output_section(folded_shndx); | |
ef15dade | 2746 | gold_assert(os != NULL); |
d6344fb5 DK |
2747 | |
2748 | // Replace (relobj, shndx) with canonical ICF input section. | |
2749 | shndx = folded_shndx; | |
2750 | relobj = folded_obj; | |
ef15dade ST |
2751 | } |
2752 | ||
d6344fb5 | 2753 | uint64_t secoff64 = relobj->output_section_offset(shndx); |
ef15dade | 2754 | if (os == NULL) |
ead1e424 | 2755 | { |
6d03d481 ST |
2756 | bool static_or_reloc = (parameters->doing_static_link() || |
2757 | parameters->options().relocatable()); | |
2758 | gold_assert(static_or_reloc || sym->dynsym_index() == -1U); | |
2759 | ||
c0a62865 DK |
2760 | *pstatus = CFVS_NO_OUTPUT_SECTION; |
2761 | return 0; | |
ead1e424 | 2762 | } |
55a93433 | 2763 | |
eff45813 CC |
2764 | if (secoff64 == -1ULL) |
2765 | { | |
2766 | // The section needs special handling (e.g., a merge section). | |
ef15dade | 2767 | |
2ea97941 | 2768 | value = os->output_address(relobj, shndx, sym->value()); |
eff45813 CC |
2769 | } |
2770 | else | |
2771 | { | |
2772 | Value_type secoff = | |
2773 | convert_types<Value_type, uint64_t>(secoff64); | |
2774 | if (sym->type() == elfcpp::STT_TLS) | |
2ea97941 | 2775 | value = sym->value() + os->tls_offset() + secoff; |
eff45813 | 2776 | else |
2ea97941 | 2777 | value = sym->value() + os->address() + secoff; |
eff45813 | 2778 | } |
ead1e424 | 2779 | } |
55a93433 ILT |
2780 | } |
2781 | break; | |
2782 | ||
2783 | case Symbol::IN_OUTPUT_DATA: | |
2784 | { | |
2785 | Output_data* od = sym->output_data(); | |
2ea97941 | 2786 | value = sym->value(); |
155a0dd7 | 2787 | if (sym->type() != elfcpp::STT_TLS) |
2ea97941 | 2788 | value += od->address(); |
155a0dd7 ILT |
2789 | else |
2790 | { | |
2791 | Output_section* os = od->output_section(); | |
2792 | gold_assert(os != NULL); | |
2ea97941 | 2793 | value += os->tls_offset() + (od->address() - os->address()); |
155a0dd7 | 2794 | } |
55a93433 | 2795 | if (sym->offset_is_from_end()) |
2ea97941 | 2796 | value += od->data_size(); |
55a93433 ILT |
2797 | } |
2798 | break; | |
2799 | ||
2800 | case Symbol::IN_OUTPUT_SEGMENT: | |
2801 | { | |
2802 | Output_segment* os = sym->output_segment(); | |
2ea97941 | 2803 | value = sym->value(); |
edfbb029 | 2804 | if (sym->type() != elfcpp::STT_TLS) |
2ea97941 | 2805 | value += os->vaddr(); |
55a93433 ILT |
2806 | switch (sym->offset_base()) |
2807 | { | |
2808 | case Symbol::SEGMENT_START: | |
2809 | break; | |
2810 | case Symbol::SEGMENT_END: | |
2ea97941 | 2811 | value += os->memsz(); |
55a93433 ILT |
2812 | break; |
2813 | case Symbol::SEGMENT_BSS: | |
2ea97941 | 2814 | value += os->filesz(); |
55a93433 ILT |
2815 | break; |
2816 | default: | |
2817 | gold_unreachable(); | |
2818 | } | |
2819 | } | |
2820 | break; | |
ead1e424 | 2821 | |
f3e9c5c5 | 2822 | case Symbol::IS_CONSTANT: |
2ea97941 | 2823 | value = sym->value(); |
55a93433 | 2824 | break; |
ead1e424 | 2825 | |
f3e9c5c5 | 2826 | case Symbol::IS_UNDEFINED: |
2ea97941 | 2827 | value = 0; |
f3e9c5c5 ILT |
2828 | break; |
2829 | ||
55a93433 ILT |
2830 | default: |
2831 | gold_unreachable(); | |
2832 | } | |
ead1e424 | 2833 | |
c0a62865 | 2834 | *pstatus = CFVS_OK; |
2ea97941 | 2835 | return value; |
c0a62865 DK |
2836 | } |
2837 | ||
2838 | // Finalize the symbol SYM. This returns true if the symbol should be | |
2839 | // added to the symbol table, false otherwise. | |
2840 | ||
2841 | template<int size> | |
2842 | bool | |
2843 | Symbol_table::sized_finalize_symbol(Symbol* unsized_sym) | |
2844 | { | |
2845 | typedef typename Sized_symbol<size>::Value_type Value_type; | |
2846 | ||
2847 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym); | |
2848 | ||
2849 | // The default version of a symbol may appear twice in the symbol | |
2850 | // table. We only need to finalize it once. | |
2851 | if (sym->has_symtab_index()) | |
2852 | return false; | |
2853 | ||
2854 | if (!sym->in_reg()) | |
2855 | { | |
2856 | gold_assert(!sym->has_symtab_index()); | |
2857 | sym->set_symtab_index(-1U); | |
2858 | gold_assert(sym->dynsym_index() == -1U); | |
2859 | return false; | |
2860 | } | |
2861 | ||
badc8139 RÁE |
2862 | // If the symbol is only present on plugin files, the plugin decided we |
2863 | // don't need it. | |
2864 | if (!sym->in_real_elf()) | |
2865 | { | |
2866 | gold_assert(!sym->has_symtab_index()); | |
2867 | sym->set_symtab_index(-1U); | |
2868 | return false; | |
2869 | } | |
2870 | ||
c0a62865 DK |
2871 | // Compute final symbol value. |
2872 | Compute_final_value_status status; | |
2ea97941 | 2873 | Value_type value = this->compute_final_value(sym, &status); |
c0a62865 DK |
2874 | |
2875 | switch (status) | |
2876 | { | |
2877 | case CFVS_OK: | |
2878 | break; | |
2879 | case CFVS_UNSUPPORTED_SYMBOL_SECTION: | |
2880 | { | |
2881 | bool is_ordinary; | |
2ea97941 | 2882 | unsigned int shndx = sym->shndx(&is_ordinary); |
c0a62865 | 2883 | gold_error(_("%s: unsupported symbol section 0x%x"), |
2ea97941 | 2884 | sym->demangled_name().c_str(), shndx); |
c0a62865 DK |
2885 | } |
2886 | break; | |
2887 | case CFVS_NO_OUTPUT_SECTION: | |
2888 | sym->set_symtab_index(-1U); | |
2889 | return false; | |
2890 | default: | |
2891 | gold_unreachable(); | |
2892 | } | |
2893 | ||
2ea97941 | 2894 | sym->set_value(value); |
9e2dcb77 | 2895 | |
8c604651 CS |
2896 | if (parameters->options().strip_all() |
2897 | || !parameters->options().should_retain_symbol(sym->name())) | |
55a93433 ILT |
2898 | { |
2899 | sym->set_symtab_index(-1U); | |
2900 | return false; | |
54dc6425 | 2901 | } |
75f65a3e | 2902 | |
55a93433 | 2903 | return true; |
54dc6425 ILT |
2904 | } |
2905 | ||
61ba1cf9 ILT |
2906 | // Write out the global symbols. |
2907 | ||
2908 | void | |
fd9d194f | 2909 | Symbol_table::write_globals(const Stringpool* sympool, |
d491d34e ILT |
2910 | const Stringpool* dynpool, |
2911 | Output_symtab_xindex* symtab_xindex, | |
2912 | Output_symtab_xindex* dynsym_xindex, | |
2913 | Output_file* of) const | |
61ba1cf9 | 2914 | { |
8851ecca | 2915 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 2916 | { |
9025d29d | 2917 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca | 2918 | case Parameters::TARGET_32_LITTLE: |
fd9d194f | 2919 | this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex, |
d491d34e | 2920 | dynsym_xindex, of); |
8851ecca | 2921 | break; |
9025d29d | 2922 | #endif |
8851ecca ILT |
2923 | #ifdef HAVE_TARGET_32_BIG |
2924 | case Parameters::TARGET_32_BIG: | |
fd9d194f | 2925 | this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex, |
d491d34e | 2926 | dynsym_xindex, of); |
8851ecca | 2927 | break; |
9025d29d | 2928 | #endif |
9025d29d | 2929 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca | 2930 | case Parameters::TARGET_64_LITTLE: |
fd9d194f | 2931 | this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex, |
d491d34e | 2932 | dynsym_xindex, of); |
8851ecca | 2933 | break; |
9025d29d | 2934 | #endif |
8851ecca ILT |
2935 | #ifdef HAVE_TARGET_64_BIG |
2936 | case Parameters::TARGET_64_BIG: | |
fd9d194f | 2937 | this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex, |
d491d34e | 2938 | dynsym_xindex, of); |
8851ecca ILT |
2939 | break; |
2940 | #endif | |
2941 | default: | |
2942 | gold_unreachable(); | |
61ba1cf9 | 2943 | } |
61ba1cf9 ILT |
2944 | } |
2945 | ||
2946 | // Write out the global symbols. | |
2947 | ||
2948 | template<int size, bool big_endian> | |
2949 | void | |
fd9d194f | 2950 | Symbol_table::sized_write_globals(const Stringpool* sympool, |
16649710 | 2951 | const Stringpool* dynpool, |
d491d34e ILT |
2952 | Output_symtab_xindex* symtab_xindex, |
2953 | Output_symtab_xindex* dynsym_xindex, | |
61ba1cf9 ILT |
2954 | Output_file* of) const |
2955 | { | |
8851ecca | 2956 | const Target& target = parameters->target(); |
9a2d6984 | 2957 | |
61ba1cf9 | 2958 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
55a93433 ILT |
2959 | |
2960 | const unsigned int output_count = this->output_count_; | |
2961 | const section_size_type oview_size = output_count * sym_size; | |
2962 | const unsigned int first_global_index = this->first_global_index_; | |
5fe2a0f5 ILT |
2963 | unsigned char* psyms; |
2964 | if (this->offset_ == 0 || output_count == 0) | |
2965 | psyms = NULL; | |
2966 | else | |
2967 | psyms = of->get_output_view(this->offset_, oview_size); | |
16649710 | 2968 | |
55a93433 ILT |
2969 | const unsigned int dynamic_count = this->dynamic_count_; |
2970 | const section_size_type dynamic_size = dynamic_count * sym_size; | |
2971 | const unsigned int first_dynamic_global_index = | |
2972 | this->first_dynamic_global_index_; | |
16649710 | 2973 | unsigned char* dynamic_view; |
5fe2a0f5 | 2974 | if (this->dynamic_offset_ == 0 || dynamic_count == 0) |
16649710 ILT |
2975 | dynamic_view = NULL; |
2976 | else | |
2977 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); | |
c06b7b0b | 2978 | |
61ba1cf9 ILT |
2979 | for (Symbol_table_type::const_iterator p = this->table_.begin(); |
2980 | p != this->table_.end(); | |
2981 | ++p) | |
2982 | { | |
2983 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); | |
2984 | ||
9a2d6984 | 2985 | // Possibly warn about unresolved symbols in shared libraries. |
fd9d194f | 2986 | this->warn_about_undefined_dynobj_symbol(sym); |
e2827e5f | 2987 | |
a3ad94ed | 2988 | unsigned int sym_index = sym->symtab_index(); |
16649710 ILT |
2989 | unsigned int dynsym_index; |
2990 | if (dynamic_view == NULL) | |
2991 | dynsym_index = -1U; | |
2992 | else | |
2993 | dynsym_index = sym->dynsym_index(); | |
2994 | ||
2995 | if (sym_index == -1U && dynsym_index == -1U) | |
a3ad94ed ILT |
2996 | { |
2997 | // This symbol is not included in the output file. | |
2998 | continue; | |
2999 | } | |
16649710 | 3000 | |
2ea97941 | 3001 | unsigned int shndx; |
88dd47ac ILT |
3002 | typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value(); |
3003 | typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value; | |
ce279a62 | 3004 | elfcpp::STB binding = sym->binding(); |
9634ed06 | 3005 | |
a100d66f ST |
3006 | // If --weak-unresolved-symbols is set, change binding of unresolved |
3007 | // global symbols to STB_WEAK. | |
3008 | if (parameters->options().weak_unresolved_symbols() | |
3009 | && binding == elfcpp::STB_GLOBAL | |
3010 | && sym->is_undefined()) | |
3011 | binding = elfcpp::STB_WEAK; | |
3012 | ||
9634ed06 CC |
3013 | // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL. |
3014 | if (binding == elfcpp::STB_GNU_UNIQUE | |
3015 | && !parameters->options().gnu_unique()) | |
3016 | binding = elfcpp::STB_GLOBAL; | |
3017 | ||
ead1e424 ILT |
3018 | switch (sym->source()) |
3019 | { | |
3020 | case Symbol::FROM_OBJECT: | |
3021 | { | |
d491d34e ILT |
3022 | bool is_ordinary; |
3023 | unsigned int in_shndx = sym->shndx(&is_ordinary); | |
ead1e424 | 3024 | |
d491d34e | 3025 | if (!is_ordinary |
0dfbdef4 | 3026 | && in_shndx != elfcpp::SHN_ABS |
8a5e3e08 | 3027 | && !Symbol::is_common_shndx(in_shndx)) |
ead1e424 | 3028 | { |
75f2446e | 3029 | gold_error(_("%s: unsupported symbol section 0x%x"), |
a2b1aa12 | 3030 | sym->demangled_name().c_str(), in_shndx); |
2ea97941 | 3031 | shndx = in_shndx; |
f6ce93d6 | 3032 | } |
ead1e424 ILT |
3033 | else |
3034 | { | |
75f2446e ILT |
3035 | Object* symobj = sym->object(); |
3036 | if (symobj->is_dynamic()) | |
3037 | { | |
3038 | if (sym->needs_dynsym_value()) | |
8851ecca | 3039 | dynsym_value = target.dynsym_value(sym); |
2ea97941 | 3040 | shndx = elfcpp::SHN_UNDEF; |
ce279a62 CC |
3041 | if (sym->is_undef_binding_weak()) |
3042 | binding = elfcpp::STB_WEAK; | |
74f67560 DK |
3043 | else |
3044 | binding = elfcpp::STB_GLOBAL; | |
75f2446e | 3045 | } |
89fc3421 | 3046 | else if (symobj->pluginobj() != NULL) |
2ea97941 | 3047 | shndx = elfcpp::SHN_UNDEF; |
75f2446e | 3048 | else if (in_shndx == elfcpp::SHN_UNDEF |
d491d34e ILT |
3049 | || (!is_ordinary |
3050 | && (in_shndx == elfcpp::SHN_ABS | |
8a5e3e08 | 3051 | || Symbol::is_common_shndx(in_shndx)))) |
2ea97941 | 3052 | shndx = in_shndx; |
75f2446e ILT |
3053 | else |
3054 | { | |
3055 | Relobj* relobj = static_cast<Relobj*>(symobj); | |
ef9beddf | 3056 | Output_section* os = relobj->output_section(in_shndx); |
ef15dade ST |
3057 | if (this->is_section_folded(relobj, in_shndx)) |
3058 | { | |
3059 | // This global symbol must be written out even though | |
3060 | // it is folded. | |
3061 | // Get the os of the section it is folded onto. | |
3062 | Section_id folded = | |
3063 | this->icf_->get_folded_section(relobj, in_shndx); | |
3064 | gold_assert(folded.first !=NULL); | |
3065 | Relobj* folded_obj = | |
3066 | reinterpret_cast<Relobj*>(folded.first); | |
3067 | os = folded_obj->output_section(folded.second); | |
3068 | gold_assert(os != NULL); | |
3069 | } | |
75f2446e | 3070 | gold_assert(os != NULL); |
2ea97941 | 3071 | shndx = os->out_shndx(); |
88dd47ac | 3072 | |
2ea97941 | 3073 | if (shndx >= elfcpp::SHN_LORESERVE) |
d491d34e ILT |
3074 | { |
3075 | if (sym_index != -1U) | |
2ea97941 | 3076 | symtab_xindex->add(sym_index, shndx); |
d491d34e | 3077 | if (dynsym_index != -1U) |
2ea97941 ILT |
3078 | dynsym_xindex->add(dynsym_index, shndx); |
3079 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e ILT |
3080 | } |
3081 | ||
88dd47ac ILT |
3082 | // In object files symbol values are section |
3083 | // relative. | |
8851ecca | 3084 | if (parameters->options().relocatable()) |
88dd47ac | 3085 | sym_value -= os->address(); |
75f2446e | 3086 | } |
ead1e424 ILT |
3087 | } |
3088 | } | |
3089 | break; | |
3090 | ||
3091 | case Symbol::IN_OUTPUT_DATA: | |
502e8a84 CC |
3092 | { |
3093 | Output_data* od = sym->output_data(); | |
3094 | ||
3095 | shndx = od->out_shndx(); | |
3096 | if (shndx >= elfcpp::SHN_LORESERVE) | |
3097 | { | |
3098 | if (sym_index != -1U) | |
3099 | symtab_xindex->add(sym_index, shndx); | |
3100 | if (dynsym_index != -1U) | |
3101 | dynsym_xindex->add(dynsym_index, shndx); | |
3102 | shndx = elfcpp::SHN_XINDEX; | |
3103 | } | |
3104 | ||
3105 | // In object files symbol values are section | |
3106 | // relative. | |
3107 | if (parameters->options().relocatable()) | |
3108 | sym_value -= od->address(); | |
3109 | } | |
ead1e424 ILT |
3110 | break; |
3111 | ||
3112 | case Symbol::IN_OUTPUT_SEGMENT: | |
2ea97941 | 3113 | shndx = elfcpp::SHN_ABS; |
ead1e424 ILT |
3114 | break; |
3115 | ||
f3e9c5c5 | 3116 | case Symbol::IS_CONSTANT: |
2ea97941 | 3117 | shndx = elfcpp::SHN_ABS; |
ead1e424 ILT |
3118 | break; |
3119 | ||
f3e9c5c5 | 3120 | case Symbol::IS_UNDEFINED: |
2ea97941 | 3121 | shndx = elfcpp::SHN_UNDEF; |
f3e9c5c5 ILT |
3122 | break; |
3123 | ||
ead1e424 | 3124 | default: |
a3ad94ed | 3125 | gold_unreachable(); |
ead1e424 | 3126 | } |
61ba1cf9 | 3127 | |
16649710 ILT |
3128 | if (sym_index != -1U) |
3129 | { | |
55a93433 ILT |
3130 | sym_index -= first_global_index; |
3131 | gold_assert(sym_index < output_count); | |
3132 | unsigned char* ps = psyms + (sym_index * sym_size); | |
2ea97941 | 3133 | this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx, |
ce279a62 | 3134 | binding, sympool, ps); |
16649710 | 3135 | } |
61ba1cf9 | 3136 | |
16649710 ILT |
3137 | if (dynsym_index != -1U) |
3138 | { | |
3139 | dynsym_index -= first_dynamic_global_index; | |
3140 | gold_assert(dynsym_index < dynamic_count); | |
3141 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
2ea97941 | 3142 | this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx, |
ce279a62 | 3143 | binding, dynpool, pd); |
800d9823 CC |
3144 | // Allow a target to adjust dynamic symbol value. |
3145 | parameters->target().adjust_dyn_symbol(sym, pd); | |
16649710 | 3146 | } |
61ba1cf9 ILT |
3147 | } |
3148 | ||
dc1c8a16 CC |
3149 | // Write the target-specific symbols. |
3150 | for (std::vector<Symbol*>::const_iterator p = this->target_symbols_.begin(); | |
3151 | p != this->target_symbols_.end(); | |
3152 | ++p) | |
3153 | { | |
3154 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(*p); | |
3155 | ||
3156 | unsigned int sym_index = sym->symtab_index(); | |
3157 | unsigned int dynsym_index; | |
3158 | if (dynamic_view == NULL) | |
3159 | dynsym_index = -1U; | |
3160 | else | |
3161 | dynsym_index = sym->dynsym_index(); | |
3162 | ||
3163 | unsigned int shndx; | |
3164 | switch (sym->source()) | |
3165 | { | |
3166 | case Symbol::IS_CONSTANT: | |
3167 | shndx = elfcpp::SHN_ABS; | |
3168 | break; | |
3169 | case Symbol::IS_UNDEFINED: | |
3170 | shndx = elfcpp::SHN_UNDEF; | |
3171 | break; | |
3172 | default: | |
3173 | gold_unreachable(); | |
3174 | } | |
3175 | ||
3176 | if (sym_index != -1U) | |
3177 | { | |
3178 | sym_index -= first_global_index; | |
3179 | gold_assert(sym_index < output_count); | |
3180 | unsigned char* ps = psyms + (sym_index * sym_size); | |
3181 | this->sized_write_symbol<size, big_endian>(sym, sym->value(), shndx, | |
3182 | sym->binding(), sympool, | |
3183 | ps); | |
3184 | } | |
3185 | ||
3186 | if (dynsym_index != -1U) | |
3187 | { | |
3188 | dynsym_index -= first_dynamic_global_index; | |
3189 | gold_assert(dynsym_index < dynamic_count); | |
3190 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
3191 | this->sized_write_symbol<size, big_endian>(sym, sym->value(), shndx, | |
3192 | sym->binding(), dynpool, | |
3193 | pd); | |
3194 | } | |
3195 | } | |
3196 | ||
c06b7b0b | 3197 | of->write_output_view(this->offset_, oview_size, psyms); |
16649710 ILT |
3198 | if (dynamic_view != NULL) |
3199 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); | |
3200 | } | |
3201 | ||
3202 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the | |
3203 | // strtab holding the name. | |
3204 | ||
3205 | template<int size, bool big_endian> | |
3206 | void | |
ab5c9e90 ILT |
3207 | Symbol_table::sized_write_symbol( |
3208 | Sized_symbol<size>* sym, | |
2ea97941 ILT |
3209 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
3210 | unsigned int shndx, | |
ce279a62 | 3211 | elfcpp::STB binding, |
ab5c9e90 | 3212 | const Stringpool* pool, |
7d1a9ebb | 3213 | unsigned char* p) const |
16649710 ILT |
3214 | { |
3215 | elfcpp::Sym_write<size, big_endian> osym(p); | |
6d1c4efb ILT |
3216 | if (sym->version() == NULL || !parameters->options().relocatable()) |
3217 | osym.put_st_name(pool->get_offset(sym->name())); | |
3218 | else | |
3219 | osym.put_st_name(pool->get_offset(sym->versioned_name())); | |
2ea97941 | 3220 | osym.put_st_value(value); |
58e54ac2 | 3221 | // Use a symbol size of zero for undefined symbols from shared libraries. |
2ea97941 | 3222 | if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj()) |
58e54ac2 CD |
3223 | osym.put_st_size(0); |
3224 | else | |
3225 | osym.put_st_size(sym->symsize()); | |
53d7974c | 3226 | elfcpp::STT type = sym->type(); |
358de988 | 3227 | gold_assert(type != elfcpp::STT_GNU_IFUNC || !sym->is_from_dynobj()); |
55a93433 ILT |
3228 | // A version script may have overridden the default binding. |
3229 | if (sym->is_forced_local()) | |
53d7974c | 3230 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type)); |
55a93433 | 3231 | else |
ce279a62 | 3232 | osym.put_st_info(elfcpp::elf_st_info(binding, type)); |
16649710 | 3233 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); |
2ea97941 | 3234 | osym.put_st_shndx(shndx); |
61ba1cf9 ILT |
3235 | } |
3236 | ||
9a2d6984 ILT |
3237 | // Check for unresolved symbols in shared libraries. This is |
3238 | // controlled by the --allow-shlib-undefined option. | |
3239 | ||
3240 | // We only warn about libraries for which we have seen all the | |
3241 | // DT_NEEDED entries. We don't try to track down DT_NEEDED entries | |
3242 | // which were not seen in this link. If we didn't see a DT_NEEDED | |
3243 | // entry, we aren't going to be able to reliably report whether the | |
3244 | // symbol is undefined. | |
3245 | ||
fd9d194f ILT |
3246 | // We also don't warn about libraries found in a system library |
3247 | // directory (e.g., /lib or /usr/lib); we assume that those libraries | |
3248 | // are OK. This heuristic avoids problems on GNU/Linux, in which -ldl | |
3249 | // can have undefined references satisfied by ld-linux.so. | |
9a2d6984 ILT |
3250 | |
3251 | inline void | |
fd9d194f | 3252 | Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const |
9a2d6984 | 3253 | { |
d491d34e | 3254 | bool dummy; |
9a2d6984 ILT |
3255 | if (sym->source() == Symbol::FROM_OBJECT |
3256 | && sym->object()->is_dynamic() | |
d491d34e | 3257 | && sym->shndx(&dummy) == elfcpp::SHN_UNDEF |
9a2d6984 | 3258 | && sym->binding() != elfcpp::STB_WEAK |
8851ecca ILT |
3259 | && !parameters->options().allow_shlib_undefined() |
3260 | && !parameters->target().is_defined_by_abi(sym) | |
fd9d194f | 3261 | && !sym->object()->is_in_system_directory()) |
9a2d6984 ILT |
3262 | { |
3263 | // A very ugly cast. | |
3264 | Dynobj* dynobj = static_cast<Dynobj*>(sym->object()); | |
3265 | if (!dynobj->has_unknown_needed_entries()) | |
f073bbf7 | 3266 | gold_undefined_symbol(sym); |
9a2d6984 ILT |
3267 | } |
3268 | } | |
3269 | ||
a3ad94ed ILT |
3270 | // Write out a section symbol. Return the update offset. |
3271 | ||
3272 | void | |
ca09d69a | 3273 | Symbol_table::write_section_symbol(const Output_section* os, |
d491d34e | 3274 | Output_symtab_xindex* symtab_xindex, |
a3ad94ed ILT |
3275 | Output_file* of, |
3276 | off_t offset) const | |
3277 | { | |
8851ecca | 3278 | switch (parameters->size_and_endianness()) |
a3ad94ed | 3279 | { |
9025d29d | 3280 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca | 3281 | case Parameters::TARGET_32_LITTLE: |
d491d34e ILT |
3282 | this->sized_write_section_symbol<32, false>(os, symtab_xindex, of, |
3283 | offset); | |
8851ecca | 3284 | break; |
9025d29d | 3285 | #endif |
8851ecca ILT |
3286 | #ifdef HAVE_TARGET_32_BIG |
3287 | case Parameters::TARGET_32_BIG: | |
d491d34e ILT |
3288 | this->sized_write_section_symbol<32, true>(os, symtab_xindex, of, |
3289 | offset); | |
8851ecca | 3290 | break; |
9025d29d | 3291 | #endif |
9025d29d | 3292 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca | 3293 | case Parameters::TARGET_64_LITTLE: |
d491d34e ILT |
3294 | this->sized_write_section_symbol<64, false>(os, symtab_xindex, of, |
3295 | offset); | |
8851ecca | 3296 | break; |
9025d29d | 3297 | #endif |
8851ecca ILT |
3298 | #ifdef HAVE_TARGET_64_BIG |
3299 | case Parameters::TARGET_64_BIG: | |
d491d34e ILT |
3300 | this->sized_write_section_symbol<64, true>(os, symtab_xindex, of, |
3301 | offset); | |
8851ecca ILT |
3302 | break; |
3303 | #endif | |
3304 | default: | |
3305 | gold_unreachable(); | |
a3ad94ed | 3306 | } |
a3ad94ed ILT |
3307 | } |
3308 | ||
3309 | // Write out a section symbol, specialized for size and endianness. | |
3310 | ||
3311 | template<int size, bool big_endian> | |
3312 | void | |
3313 | Symbol_table::sized_write_section_symbol(const Output_section* os, | |
d491d34e | 3314 | Output_symtab_xindex* symtab_xindex, |
a3ad94ed ILT |
3315 | Output_file* of, |
3316 | off_t offset) const | |
3317 | { | |
3318 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
3319 | ||
3320 | unsigned char* pov = of->get_output_view(offset, sym_size); | |
3321 | ||
3322 | elfcpp::Sym_write<size, big_endian> osym(pov); | |
3323 | osym.put_st_name(0); | |
b4ecf66b ILT |
3324 | if (parameters->options().relocatable()) |
3325 | osym.put_st_value(0); | |
3326 | else | |
3327 | osym.put_st_value(os->address()); | |
a3ad94ed ILT |
3328 | osym.put_st_size(0); |
3329 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, | |
3330 | elfcpp::STT_SECTION)); | |
3331 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); | |
d491d34e | 3332 | |
2ea97941 ILT |
3333 | unsigned int shndx = os->out_shndx(); |
3334 | if (shndx >= elfcpp::SHN_LORESERVE) | |
d491d34e | 3335 | { |
2ea97941 ILT |
3336 | symtab_xindex->add(os->symtab_index(), shndx); |
3337 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e | 3338 | } |
2ea97941 | 3339 | osym.put_st_shndx(shndx); |
a3ad94ed ILT |
3340 | |
3341 | of->write_output_view(offset, sym_size, pov); | |
3342 | } | |
3343 | ||
abaa3995 ILT |
3344 | // Print statistical information to stderr. This is used for --stats. |
3345 | ||
3346 | void | |
3347 | Symbol_table::print_stats() const | |
3348 | { | |
3349 | #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP) | |
3350 | fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"), | |
3351 | program_name, this->table_.size(), this->table_.bucket_count()); | |
3352 | #else | |
3353 | fprintf(stderr, _("%s: symbol table entries: %zu\n"), | |
3354 | program_name, this->table_.size()); | |
3355 | #endif | |
ad8f37d1 | 3356 | this->namepool_.print_stats("symbol table stringpool"); |
abaa3995 ILT |
3357 | } |
3358 | ||
ff541f30 ILT |
3359 | // We check for ODR violations by looking for symbols with the same |
3360 | // name for which the debugging information reports that they were | |
71ff8986 | 3361 | // defined in disjoint source locations. When comparing the source |
55382fb7 ILT |
3362 | // location, we consider instances with the same base filename to be |
3363 | // the same. This is because different object files/shared libraries | |
3364 | // can include the same header file using different paths, and | |
3365 | // different optimization settings can make the line number appear to | |
3366 | // be a couple lines off, and we don't want to report an ODR violation | |
3367 | // in those cases. | |
ff541f30 ILT |
3368 | |
3369 | // This struct is used to compare line information, as returned by | |
7bf1f802 | 3370 | // Dwarf_line_info::one_addr2line. It implements a < comparison |
71ff8986 | 3371 | // operator used with std::sort. |
ff541f30 ILT |
3372 | |
3373 | struct Odr_violation_compare | |
3374 | { | |
3375 | bool | |
3376 | operator()(const std::string& s1, const std::string& s2) const | |
3377 | { | |
55382fb7 | 3378 | // Inputs should be of the form "dirname/filename:linenum" where |
71ff8986 | 3379 | // "dirname/" is optional. We want to compare just the filename:linenum. |
55382fb7 | 3380 | |
71ff8986 | 3381 | // Find the last '/' in each string. |
55382fb7 ILT |
3382 | std::string::size_type s1begin = s1.rfind('/'); |
3383 | std::string::size_type s2begin = s2.rfind('/'); | |
55382fb7 ILT |
3384 | // If there was no '/' in a string, start at the beginning. |
3385 | if (s1begin == std::string::npos) | |
3386 | s1begin = 0; | |
3387 | if (s2begin == std::string::npos) | |
3388 | s2begin = 0; | |
71ff8986 ILT |
3389 | return s1.compare(s1begin, std::string::npos, |
3390 | s2, s2begin, std::string::npos) < 0; | |
ff541f30 ILT |
3391 | } |
3392 | }; | |
3393 | ||
71ff8986 ILT |
3394 | // Returns all of the lines attached to LOC, not just the one the |
3395 | // instruction actually came from. | |
3396 | std::vector<std::string> | |
3397 | Symbol_table::linenos_from_loc(const Task* task, | |
3398 | const Symbol_location& loc) | |
3399 | { | |
3400 | // We need to lock the object in order to read it. This | |
3401 | // means that we have to run in a singleton Task. If we | |
3402 | // want to run this in a general Task for better | |
3403 | // performance, we will need one Task for object, plus | |
3404 | // appropriate locking to ensure that we don't conflict with | |
3405 | // other uses of the object. Also note, one_addr2line is not | |
3406 | // currently thread-safe. | |
3407 | Task_lock_obj<Object> tl(task, loc.object); | |
3408 | ||
3409 | std::vector<std::string> result; | |
dc3714f3 AM |
3410 | Symbol_location code_loc = loc; |
3411 | parameters->target().function_location(&code_loc); | |
71ff8986 ILT |
3412 | // 16 is the size of the object-cache that one_addr2line should use. |
3413 | std::string canonical_result = Dwarf_line_info::one_addr2line( | |
dc3714f3 | 3414 | code_loc.object, code_loc.shndx, code_loc.offset, 16, &result); |
71ff8986 ILT |
3415 | if (!canonical_result.empty()) |
3416 | result.push_back(canonical_result); | |
3417 | return result; | |
3418 | } | |
3419 | ||
3420 | // OutputIterator that records if it was ever assigned to. This | |
3421 | // allows it to be used with std::set_intersection() to check for | |
3422 | // intersection rather than computing the intersection. | |
3423 | struct Check_intersection | |
3424 | { | |
3425 | Check_intersection() | |
3426 | : value_(false) | |
3427 | {} | |
3428 | ||
3429 | bool had_intersection() const | |
3430 | { return this->value_; } | |
3431 | ||
3432 | Check_intersection& operator++() | |
3433 | { return *this; } | |
3434 | ||
3435 | Check_intersection& operator*() | |
3436 | { return *this; } | |
3437 | ||
3438 | template<typename T> | |
3439 | Check_intersection& operator=(const T&) | |
3440 | { | |
3441 | this->value_ = true; | |
3442 | return *this; | |
3443 | } | |
3444 | ||
3445 | private: | |
3446 | bool value_; | |
3447 | }; | |
3448 | ||
70e654ba | 3449 | // Check candidate_odr_violations_ to find symbols with the same name |
71ff8986 ILT |
3450 | // but apparently different definitions (different source-file/line-no |
3451 | // for each line assigned to the first instruction). | |
70e654ba ILT |
3452 | |
3453 | void | |
17a1d0a9 ILT |
3454 | Symbol_table::detect_odr_violations(const Task* task, |
3455 | const char* output_file_name) const | |
70e654ba ILT |
3456 | { |
3457 | for (Odr_map::const_iterator it = candidate_odr_violations_.begin(); | |
3458 | it != candidate_odr_violations_.end(); | |
3459 | ++it) | |
3460 | { | |
71ff8986 ILT |
3461 | const char* const symbol_name = it->first; |
3462 | ||
3463 | std::string first_object_name; | |
3464 | std::vector<std::string> first_object_linenos; | |
3465 | ||
3466 | Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator | |
3467 | locs = it->second.begin(); | |
3468 | const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator | |
3469 | locs_end = it->second.end(); | |
3470 | for (; locs != locs_end && first_object_linenos.empty(); ++locs) | |
70e654ba | 3471 | { |
71ff8986 ILT |
3472 | // Save the line numbers from the first definition to |
3473 | // compare to the other definitions. Ideally, we'd compare | |
3474 | // every definition to every other, but we don't want to | |
3475 | // take O(N^2) time to do this. This shortcut may cause | |
3476 | // false negatives that appear or disappear depending on the | |
3477 | // link order, but it won't cause false positives. | |
3478 | first_object_name = locs->object->name(); | |
3479 | first_object_linenos = this->linenos_from_loc(task, *locs); | |
70e654ba | 3480 | } |
437ddf0c CC |
3481 | if (first_object_linenos.empty()) |
3482 | continue; | |
70e654ba | 3483 | |
71ff8986 | 3484 | // Sort by Odr_violation_compare to make std::set_intersection work. |
437ddf0c | 3485 | std::string first_object_canonical_result = first_object_linenos.back(); |
71ff8986 ILT |
3486 | std::sort(first_object_linenos.begin(), first_object_linenos.end(), |
3487 | Odr_violation_compare()); | |
3488 | ||
3489 | for (; locs != locs_end; ++locs) | |
70e654ba | 3490 | { |
71ff8986 ILT |
3491 | std::vector<std::string> linenos = |
3492 | this->linenos_from_loc(task, *locs); | |
3493 | // linenos will be empty if we couldn't parse the debug info. | |
3494 | if (linenos.empty()) | |
3495 | continue; | |
3496 | // Sort by Odr_violation_compare to make std::set_intersection work. | |
437ddf0c CC |
3497 | gold_assert(!linenos.empty()); |
3498 | std::string second_object_canonical_result = linenos.back(); | |
71ff8986 ILT |
3499 | std::sort(linenos.begin(), linenos.end(), Odr_violation_compare()); |
3500 | ||
3501 | Check_intersection intersection_result = | |
3502 | std::set_intersection(first_object_linenos.begin(), | |
3503 | first_object_linenos.end(), | |
3504 | linenos.begin(), | |
3505 | linenos.end(), | |
3506 | Check_intersection(), | |
3507 | Odr_violation_compare()); | |
3508 | if (!intersection_result.had_intersection()) | |
3509 | { | |
3510 | gold_warning(_("while linking %s: symbol '%s' defined in " | |
3511 | "multiple places (possible ODR violation):"), | |
3512 | output_file_name, demangle(symbol_name).c_str()); | |
3513 | // This only prints one location from each definition, | |
3514 | // which may not be the location we expect to intersect | |
3515 | // with another definition. We could print the whole | |
3516 | // set of locations, but that seems too verbose. | |
71ff8986 | 3517 | fprintf(stderr, _(" %s from %s\n"), |
437ddf0c | 3518 | first_object_canonical_result.c_str(), |
71ff8986 ILT |
3519 | first_object_name.c_str()); |
3520 | fprintf(stderr, _(" %s from %s\n"), | |
437ddf0c | 3521 | second_object_canonical_result.c_str(), |
71ff8986 ILT |
3522 | locs->object->name().c_str()); |
3523 | // Only print one broken pair, to avoid needing to | |
3524 | // compare against a list of the disjoint definition | |
3525 | // locations we've found so far. (If we kept comparing | |
3526 | // against just the first one, we'd get a lot of | |
3527 | // redundant complaints about the second definition | |
3528 | // location.) | |
3529 | break; | |
3530 | } | |
70e654ba ILT |
3531 | } |
3532 | } | |
e4e5049b CS |
3533 | // We only call one_addr2line() in this function, so we can clear its cache. |
3534 | Dwarf_line_info::clear_addr2line_cache(); | |
70e654ba ILT |
3535 | } |
3536 | ||
f6ce93d6 ILT |
3537 | // Warnings functions. |
3538 | ||
3539 | // Add a new warning. | |
3540 | ||
3541 | void | |
2ea97941 | 3542 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, |
cb295612 | 3543 | const std::string& warning) |
f6ce93d6 | 3544 | { |
2ea97941 ILT |
3545 | name = symtab->canonicalize_name(name); |
3546 | this->warnings_[name].set(obj, warning); | |
f6ce93d6 ILT |
3547 | } |
3548 | ||
3549 | // Look through the warnings and mark the symbols for which we should | |
3550 | // warn. This is called during Layout::finalize when we know the | |
3551 | // sources for all the symbols. | |
3552 | ||
3553 | void | |
cb295612 | 3554 | Warnings::note_warnings(Symbol_table* symtab) |
f6ce93d6 ILT |
3555 | { |
3556 | for (Warning_table::iterator p = this->warnings_.begin(); | |
3557 | p != this->warnings_.end(); | |
3558 | ++p) | |
3559 | { | |
3560 | Symbol* sym = symtab->lookup(p->first, NULL); | |
3561 | if (sym != NULL | |
3562 | && sym->source() == Symbol::FROM_OBJECT | |
3563 | && sym->object() == p->second.object) | |
cb295612 | 3564 | sym->set_has_warning(); |
f6ce93d6 ILT |
3565 | } |
3566 | } | |
3567 | ||
3568 | // Issue a warning. This is called when we see a relocation against a | |
3569 | // symbol for which has a warning. | |
3570 | ||
75f2446e | 3571 | template<int size, bool big_endian> |
f6ce93d6 | 3572 | void |
75f2446e ILT |
3573 | Warnings::issue_warning(const Symbol* sym, |
3574 | const Relocate_info<size, big_endian>* relinfo, | |
3575 | size_t relnum, off_t reloffset) const | |
f6ce93d6 | 3576 | { |
a3ad94ed | 3577 | gold_assert(sym->has_warning()); |
9d3b0698 ILT |
3578 | |
3579 | // We don't want to issue a warning for a relocation against the | |
3580 | // symbol in the same object file in which the symbol is defined. | |
3581 | if (sym->object() == relinfo->object) | |
3582 | return; | |
3583 | ||
f6ce93d6 | 3584 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
a3ad94ed | 3585 | gold_assert(p != this->warnings_.end()); |
75f2446e ILT |
3586 | gold_warning_at_location(relinfo, relnum, reloffset, |
3587 | "%s", p->second.text.c_str()); | |
f6ce93d6 ILT |
3588 | } |
3589 | ||
14bfc3f5 ILT |
3590 | // Instantiate the templates we need. We could use the configure |
3591 | // script to restrict this to only the ones needed for implemented | |
3592 | // targets. | |
3593 | ||
c7912668 ILT |
3594 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3595 | template | |
3596 | void | |
3597 | Sized_symbol<32>::allocate_common(Output_data*, Value_type); | |
3598 | #endif | |
3599 | ||
3600 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3601 | template | |
3602 | void | |
3603 | Sized_symbol<64>::allocate_common(Output_data*, Value_type); | |
3604 | #endif | |
3605 | ||
193a53d9 | 3606 | #ifdef HAVE_TARGET_32_LITTLE |
14bfc3f5 ILT |
3607 | template |
3608 | void | |
193a53d9 | 3609 | Symbol_table::add_from_relobj<32, false>( |
6fa2a40b | 3610 | Sized_relobj_file<32, false>* relobj, |
f6ce93d6 | 3611 | const unsigned char* syms, |
14bfc3f5 | 3612 | size_t count, |
d491d34e | 3613 | size_t symndx_offset, |
14bfc3f5 ILT |
3614 | const char* sym_names, |
3615 | size_t sym_name_size, | |
6fa2a40b | 3616 | Sized_relobj_file<32, false>::Symbols* sympointers, |
92de84a6 | 3617 | size_t* defined); |
193a53d9 | 3618 | #endif |
14bfc3f5 | 3619 | |
193a53d9 | 3620 | #ifdef HAVE_TARGET_32_BIG |
14bfc3f5 ILT |
3621 | template |
3622 | void | |
193a53d9 | 3623 | Symbol_table::add_from_relobj<32, true>( |
6fa2a40b | 3624 | Sized_relobj_file<32, true>* relobj, |
f6ce93d6 | 3625 | const unsigned char* syms, |
14bfc3f5 | 3626 | size_t count, |
d491d34e | 3627 | size_t symndx_offset, |
14bfc3f5 ILT |
3628 | const char* sym_names, |
3629 | size_t sym_name_size, | |
6fa2a40b | 3630 | Sized_relobj_file<32, true>::Symbols* sympointers, |
92de84a6 | 3631 | size_t* defined); |
193a53d9 | 3632 | #endif |
14bfc3f5 | 3633 | |
193a53d9 | 3634 | #ifdef HAVE_TARGET_64_LITTLE |
14bfc3f5 ILT |
3635 | template |
3636 | void | |
193a53d9 | 3637 | Symbol_table::add_from_relobj<64, false>( |
6fa2a40b | 3638 | Sized_relobj_file<64, false>* relobj, |
f6ce93d6 | 3639 | const unsigned char* syms, |
14bfc3f5 | 3640 | size_t count, |
d491d34e | 3641 | size_t symndx_offset, |
14bfc3f5 ILT |
3642 | const char* sym_names, |
3643 | size_t sym_name_size, | |
6fa2a40b | 3644 | Sized_relobj_file<64, false>::Symbols* sympointers, |
92de84a6 | 3645 | size_t* defined); |
193a53d9 | 3646 | #endif |
14bfc3f5 | 3647 | |
193a53d9 | 3648 | #ifdef HAVE_TARGET_64_BIG |
14bfc3f5 ILT |
3649 | template |
3650 | void | |
193a53d9 | 3651 | Symbol_table::add_from_relobj<64, true>( |
6fa2a40b | 3652 | Sized_relobj_file<64, true>* relobj, |
f6ce93d6 | 3653 | const unsigned char* syms, |
14bfc3f5 | 3654 | size_t count, |
d491d34e | 3655 | size_t symndx_offset, |
14bfc3f5 ILT |
3656 | const char* sym_names, |
3657 | size_t sym_name_size, | |
6fa2a40b | 3658 | Sized_relobj_file<64, true>::Symbols* sympointers, |
92de84a6 | 3659 | size_t* defined); |
193a53d9 | 3660 | #endif |
14bfc3f5 | 3661 | |
89fc3421 CC |
3662 | #ifdef HAVE_TARGET_32_LITTLE |
3663 | template | |
3664 | Symbol* | |
3665 | Symbol_table::add_from_pluginobj<32, false>( | |
3666 | Sized_pluginobj<32, false>* obj, | |
3667 | const char* name, | |
3668 | const char* ver, | |
3669 | elfcpp::Sym<32, false>* sym); | |
3670 | #endif | |
3671 | ||
3672 | #ifdef HAVE_TARGET_32_BIG | |
3673 | template | |
3674 | Symbol* | |
3675 | Symbol_table::add_from_pluginobj<32, true>( | |
3676 | Sized_pluginobj<32, true>* obj, | |
3677 | const char* name, | |
3678 | const char* ver, | |
3679 | elfcpp::Sym<32, true>* sym); | |
3680 | #endif | |
3681 | ||
3682 | #ifdef HAVE_TARGET_64_LITTLE | |
3683 | template | |
3684 | Symbol* | |
3685 | Symbol_table::add_from_pluginobj<64, false>( | |
3686 | Sized_pluginobj<64, false>* obj, | |
3687 | const char* name, | |
3688 | const char* ver, | |
3689 | elfcpp::Sym<64, false>* sym); | |
3690 | #endif | |
3691 | ||
3692 | #ifdef HAVE_TARGET_64_BIG | |
3693 | template | |
3694 | Symbol* | |
3695 | Symbol_table::add_from_pluginobj<64, true>( | |
3696 | Sized_pluginobj<64, true>* obj, | |
3697 | const char* name, | |
3698 | const char* ver, | |
3699 | elfcpp::Sym<64, true>* sym); | |
3700 | #endif | |
3701 | ||
193a53d9 | 3702 | #ifdef HAVE_TARGET_32_LITTLE |
dbe717ef ILT |
3703 | template |
3704 | void | |
193a53d9 ILT |
3705 | Symbol_table::add_from_dynobj<32, false>( |
3706 | Sized_dynobj<32, false>* dynobj, | |
dbe717ef ILT |
3707 | const unsigned char* syms, |
3708 | size_t count, | |
3709 | const char* sym_names, | |
3710 | size_t sym_name_size, | |
3711 | const unsigned char* versym, | |
3712 | size_t versym_size, | |
92de84a6 | 3713 | const std::vector<const char*>* version_map, |
6fa2a40b | 3714 | Sized_relobj_file<32, false>::Symbols* sympointers, |
92de84a6 | 3715 | size_t* defined); |
193a53d9 | 3716 | #endif |
dbe717ef | 3717 | |
193a53d9 | 3718 | #ifdef HAVE_TARGET_32_BIG |
dbe717ef ILT |
3719 | template |
3720 | void | |
193a53d9 ILT |
3721 | Symbol_table::add_from_dynobj<32, true>( |
3722 | Sized_dynobj<32, true>* dynobj, | |
dbe717ef ILT |
3723 | const unsigned char* syms, |
3724 | size_t count, | |
3725 | const char* sym_names, | |
3726 | size_t sym_name_size, | |
3727 | const unsigned char* versym, | |
3728 | size_t versym_size, | |
92de84a6 | 3729 | const std::vector<const char*>* version_map, |
6fa2a40b | 3730 | Sized_relobj_file<32, true>::Symbols* sympointers, |
92de84a6 | 3731 | size_t* defined); |
193a53d9 | 3732 | #endif |
dbe717ef | 3733 | |
193a53d9 | 3734 | #ifdef HAVE_TARGET_64_LITTLE |
dbe717ef ILT |
3735 | template |
3736 | void | |
193a53d9 ILT |
3737 | Symbol_table::add_from_dynobj<64, false>( |
3738 | Sized_dynobj<64, false>* dynobj, | |
dbe717ef ILT |
3739 | const unsigned char* syms, |
3740 | size_t count, | |
3741 | const char* sym_names, | |
3742 | size_t sym_name_size, | |
3743 | const unsigned char* versym, | |
3744 | size_t versym_size, | |
92de84a6 | 3745 | const std::vector<const char*>* version_map, |
6fa2a40b | 3746 | Sized_relobj_file<64, false>::Symbols* sympointers, |
92de84a6 | 3747 | size_t* defined); |
193a53d9 | 3748 | #endif |
dbe717ef | 3749 | |
193a53d9 | 3750 | #ifdef HAVE_TARGET_64_BIG |
dbe717ef ILT |
3751 | template |
3752 | void | |
193a53d9 ILT |
3753 | Symbol_table::add_from_dynobj<64, true>( |
3754 | Sized_dynobj<64, true>* dynobj, | |
dbe717ef ILT |
3755 | const unsigned char* syms, |
3756 | size_t count, | |
3757 | const char* sym_names, | |
3758 | size_t sym_name_size, | |
3759 | const unsigned char* versym, | |
3760 | size_t versym_size, | |
92de84a6 | 3761 | const std::vector<const char*>* version_map, |
6fa2a40b | 3762 | Sized_relobj_file<64, true>::Symbols* sympointers, |
92de84a6 | 3763 | size_t* defined); |
193a53d9 | 3764 | #endif |
dbe717ef | 3765 | |
cdc29364 CC |
3766 | #ifdef HAVE_TARGET_32_LITTLE |
3767 | template | |
26d3c67d | 3768 | Sized_symbol<32>* |
cdc29364 CC |
3769 | Symbol_table::add_from_incrobj( |
3770 | Object* obj, | |
3771 | const char* name, | |
3772 | const char* ver, | |
3773 | elfcpp::Sym<32, false>* sym); | |
3774 | #endif | |
3775 | ||
3776 | #ifdef HAVE_TARGET_32_BIG | |
3777 | template | |
26d3c67d | 3778 | Sized_symbol<32>* |
cdc29364 CC |
3779 | Symbol_table::add_from_incrobj( |
3780 | Object* obj, | |
3781 | const char* name, | |
3782 | const char* ver, | |
3783 | elfcpp::Sym<32, true>* sym); | |
3784 | #endif | |
3785 | ||
3786 | #ifdef HAVE_TARGET_64_LITTLE | |
3787 | template | |
26d3c67d | 3788 | Sized_symbol<64>* |
cdc29364 CC |
3789 | Symbol_table::add_from_incrobj( |
3790 | Object* obj, | |
3791 | const char* name, | |
3792 | const char* ver, | |
3793 | elfcpp::Sym<64, false>* sym); | |
3794 | #endif | |
3795 | ||
3796 | #ifdef HAVE_TARGET_64_BIG | |
3797 | template | |
26d3c67d | 3798 | Sized_symbol<64>* |
cdc29364 CC |
3799 | Symbol_table::add_from_incrobj( |
3800 | Object* obj, | |
3801 | const char* name, | |
3802 | const char* ver, | |
3803 | elfcpp::Sym<64, true>* sym); | |
3804 | #endif | |
3805 | ||
46fe1623 ILT |
3806 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3807 | template | |
3808 | void | |
fe8718a4 | 3809 | Symbol_table::define_with_copy_reloc<32>( |
fe8718a4 ILT |
3810 | Sized_symbol<32>* sym, |
3811 | Output_data* posd, | |
2ea97941 | 3812 | elfcpp::Elf_types<32>::Elf_Addr value); |
46fe1623 ILT |
3813 | #endif |
3814 | ||
3815 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3816 | template | |
3817 | void | |
fe8718a4 | 3818 | Symbol_table::define_with_copy_reloc<64>( |
fe8718a4 ILT |
3819 | Sized_symbol<64>* sym, |
3820 | Output_data* posd, | |
2ea97941 | 3821 | elfcpp::Elf_types<64>::Elf_Addr value); |
46fe1623 ILT |
3822 | #endif |
3823 | ||
beacaa96 CC |
3824 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3825 | template | |
3826 | void | |
3827 | Sized_symbol<32>::init_output_data(const char* name, const char* version, | |
3828 | Output_data* od, Value_type value, | |
3829 | Size_type symsize, elfcpp::STT type, | |
3830 | elfcpp::STB binding, | |
3831 | elfcpp::STV visibility, | |
3832 | unsigned char nonvis, | |
3833 | bool offset_is_from_end, | |
3834 | bool is_predefined); | |
8d04e81d CC |
3835 | |
3836 | template | |
3837 | void | |
3838 | Sized_symbol<32>::init_constant(const char* name, const char* version, | |
3839 | Value_type value, Size_type symsize, | |
3840 | elfcpp::STT type, elfcpp::STB binding, | |
3841 | elfcpp::STV visibility, unsigned char nonvis, | |
3842 | bool is_predefined); | |
3843 | ||
3844 | template | |
3845 | void | |
3846 | Sized_symbol<32>::init_undefined(const char* name, const char* version, | |
3847 | Value_type value, elfcpp::STT type, | |
3848 | elfcpp::STB binding, elfcpp::STV visibility, | |
3849 | unsigned char nonvis); | |
beacaa96 CC |
3850 | #endif |
3851 | ||
3852 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3853 | template | |
3854 | void | |
3855 | Sized_symbol<64>::init_output_data(const char* name, const char* version, | |
3856 | Output_data* od, Value_type value, | |
3857 | Size_type symsize, elfcpp::STT type, | |
3858 | elfcpp::STB binding, | |
3859 | elfcpp::STV visibility, | |
3860 | unsigned char nonvis, | |
3861 | bool offset_is_from_end, | |
3862 | bool is_predefined); | |
8d04e81d CC |
3863 | |
3864 | template | |
3865 | void | |
3866 | Sized_symbol<64>::init_constant(const char* name, const char* version, | |
3867 | Value_type value, Size_type symsize, | |
3868 | elfcpp::STT type, elfcpp::STB binding, | |
3869 | elfcpp::STV visibility, unsigned char nonvis, | |
3870 | bool is_predefined); | |
3871 | ||
3872 | template | |
3873 | void | |
3874 | Sized_symbol<64>::init_undefined(const char* name, const char* version, | |
3875 | Value_type value, elfcpp::STT type, | |
3876 | elfcpp::STB binding, elfcpp::STV visibility, | |
3877 | unsigned char nonvis); | |
beacaa96 CC |
3878 | #endif |
3879 | ||
75f2446e ILT |
3880 | #ifdef HAVE_TARGET_32_LITTLE |
3881 | template | |
3882 | void | |
3883 | Warnings::issue_warning<32, false>(const Symbol* sym, | |
3884 | const Relocate_info<32, false>* relinfo, | |
3885 | size_t relnum, off_t reloffset) const; | |
3886 | #endif | |
3887 | ||
3888 | #ifdef HAVE_TARGET_32_BIG | |
3889 | template | |
3890 | void | |
3891 | Warnings::issue_warning<32, true>(const Symbol* sym, | |
3892 | const Relocate_info<32, true>* relinfo, | |
3893 | size_t relnum, off_t reloffset) const; | |
3894 | #endif | |
3895 | ||
3896 | #ifdef HAVE_TARGET_64_LITTLE | |
3897 | template | |
3898 | void | |
3899 | Warnings::issue_warning<64, false>(const Symbol* sym, | |
3900 | const Relocate_info<64, false>* relinfo, | |
3901 | size_t relnum, off_t reloffset) const; | |
3902 | #endif | |
3903 | ||
3904 | #ifdef HAVE_TARGET_64_BIG | |
3905 | template | |
3906 | void | |
3907 | Warnings::issue_warning<64, true>(const Symbol* sym, | |
3908 | const Relocate_info<64, true>* relinfo, | |
3909 | size_t relnum, off_t reloffset) const; | |
3910 | #endif | |
3911 | ||
14bfc3f5 | 3912 | } // End namespace gold. |