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14bfc3f5 ILT |
1 | // symtab.cc -- the gold symbol table |
2 | ||
b90efa5b | 3 | // Copyright (C) 2006-2015 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; |
ead1e424 ILT |
83 | } |
84 | ||
a2b1aa12 ILT |
85 | // Return the demangled version of the symbol's name, but only |
86 | // if the --demangle flag was set. | |
87 | ||
88 | static std::string | |
2ea97941 | 89 | demangle(const char* name) |
a2b1aa12 | 90 | { |
086a1841 | 91 | if (!parameters->options().do_demangle()) |
2ea97941 | 92 | return name; |
ff541f30 | 93 | |
a2b1aa12 ILT |
94 | // cplus_demangle allocates memory for the result it returns, |
95 | // and returns NULL if the name is already demangled. | |
2ea97941 | 96 | char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS); |
a2b1aa12 | 97 | if (demangled_name == NULL) |
2ea97941 | 98 | return name; |
a2b1aa12 ILT |
99 | |
100 | std::string retval(demangled_name); | |
101 | free(demangled_name); | |
102 | return retval; | |
103 | } | |
104 | ||
105 | std::string | |
106 | Symbol::demangled_name() const | |
107 | { | |
ff541f30 | 108 | return demangle(this->name()); |
a2b1aa12 ILT |
109 | } |
110 | ||
ead1e424 ILT |
111 | // Initialize the fields in the base class Symbol for SYM in OBJECT. |
112 | ||
113 | template<int size, bool big_endian> | |
114 | void | |
2ea97941 | 115 | Symbol::init_base_object(const char* name, const char* version, Object* object, |
f3e9c5c5 ILT |
116 | const elfcpp::Sym<size, big_endian>& sym, |
117 | unsigned int st_shndx, bool is_ordinary) | |
ead1e424 | 118 | { |
2ea97941 | 119 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), |
ead1e424 | 120 | sym.get_st_visibility(), sym.get_st_nonvis()); |
2ea97941 | 121 | this->u_.from_object.object = object; |
d491d34e ILT |
122 | this->u_.from_object.shndx = st_shndx; |
123 | this->is_ordinary_shndx_ = is_ordinary; | |
ead1e424 | 124 | this->source_ = FROM_OBJECT; |
2ea97941 ILT |
125 | this->in_reg_ = !object->is_dynamic(); |
126 | this->in_dyn_ = object->is_dynamic(); | |
127 | this->in_real_elf_ = object->pluginobj() == NULL; | |
14bfc3f5 ILT |
128 | } |
129 | ||
ead1e424 ILT |
130 | // Initialize the fields in the base class Symbol for a symbol defined |
131 | // in an Output_data. | |
132 | ||
133 | void | |
2ea97941 ILT |
134 | Symbol::init_base_output_data(const char* name, const char* version, |
135 | Output_data* od, elfcpp::STT type, | |
136 | elfcpp::STB binding, elfcpp::STV visibility, | |
5146f448 CC |
137 | unsigned char nonvis, bool offset_is_from_end, |
138 | bool is_predefined) | |
ead1e424 | 139 | { |
2ea97941 | 140 | this->init_fields(name, version, type, binding, visibility, nonvis); |
ead1e424 | 141 | this->u_.in_output_data.output_data = od; |
2ea97941 | 142 | this->u_.in_output_data.offset_is_from_end = offset_is_from_end; |
ead1e424 | 143 | this->source_ = IN_OUTPUT_DATA; |
008db82e | 144 | this->in_reg_ = true; |
89fc3421 | 145 | this->in_real_elf_ = true; |
5146f448 | 146 | this->is_predefined_ = is_predefined; |
ead1e424 ILT |
147 | } |
148 | ||
149 | // Initialize the fields in the base class Symbol for a symbol defined | |
150 | // in an Output_segment. | |
151 | ||
152 | void | |
2ea97941 ILT |
153 | Symbol::init_base_output_segment(const char* name, const char* version, |
154 | Output_segment* os, elfcpp::STT type, | |
155 | elfcpp::STB binding, elfcpp::STV visibility, | |
156 | unsigned char nonvis, | |
5146f448 CC |
157 | Segment_offset_base offset_base, |
158 | bool is_predefined) | |
ead1e424 | 159 | { |
2ea97941 | 160 | this->init_fields(name, version, type, binding, visibility, nonvis); |
ead1e424 | 161 | this->u_.in_output_segment.output_segment = os; |
2ea97941 | 162 | this->u_.in_output_segment.offset_base = offset_base; |
ead1e424 | 163 | this->source_ = IN_OUTPUT_SEGMENT; |
008db82e | 164 | this->in_reg_ = true; |
89fc3421 | 165 | this->in_real_elf_ = true; |
5146f448 | 166 | this->is_predefined_ = is_predefined; |
ead1e424 ILT |
167 | } |
168 | ||
169 | // Initialize the fields in the base class Symbol for a symbol defined | |
170 | // as a constant. | |
171 | ||
172 | void | |
2ea97941 ILT |
173 | Symbol::init_base_constant(const char* name, const char* version, |
174 | elfcpp::STT type, elfcpp::STB binding, | |
5146f448 CC |
175 | elfcpp::STV visibility, unsigned char nonvis, |
176 | bool is_predefined) | |
f3e9c5c5 | 177 | { |
2ea97941 | 178 | this->init_fields(name, version, type, binding, visibility, nonvis); |
f3e9c5c5 ILT |
179 | this->source_ = IS_CONSTANT; |
180 | this->in_reg_ = true; | |
89fc3421 | 181 | this->in_real_elf_ = true; |
5146f448 | 182 | this->is_predefined_ = is_predefined; |
f3e9c5c5 ILT |
183 | } |
184 | ||
185 | // Initialize the fields in the base class Symbol for an undefined | |
186 | // symbol. | |
187 | ||
188 | void | |
2ea97941 ILT |
189 | Symbol::init_base_undefined(const char* name, const char* version, |
190 | elfcpp::STT type, elfcpp::STB binding, | |
191 | elfcpp::STV visibility, unsigned char nonvis) | |
ead1e424 | 192 | { |
2ea97941 | 193 | this->init_fields(name, version, type, binding, visibility, nonvis); |
d7ab2a47 | 194 | this->dynsym_index_ = -1U; |
f3e9c5c5 | 195 | this->source_ = IS_UNDEFINED; |
008db82e | 196 | this->in_reg_ = true; |
89fc3421 | 197 | this->in_real_elf_ = true; |
ead1e424 ILT |
198 | } |
199 | ||
c7912668 ILT |
200 | // Allocate a common symbol in the base. |
201 | ||
202 | void | |
203 | Symbol::allocate_base_common(Output_data* od) | |
204 | { | |
205 | gold_assert(this->is_common()); | |
206 | this->source_ = IN_OUTPUT_DATA; | |
207 | this->u_.in_output_data.output_data = od; | |
208 | this->u_.in_output_data.offset_is_from_end = false; | |
209 | } | |
210 | ||
ead1e424 | 211 | // Initialize the fields in Sized_symbol for SYM in OBJECT. |
14bfc3f5 ILT |
212 | |
213 | template<int size> | |
214 | template<bool big_endian> | |
215 | void | |
2ea97941 ILT |
216 | Sized_symbol<size>::init_object(const char* name, const char* version, |
217 | Object* object, | |
f3e9c5c5 ILT |
218 | const elfcpp::Sym<size, big_endian>& sym, |
219 | unsigned int st_shndx, bool is_ordinary) | |
14bfc3f5 | 220 | { |
2ea97941 | 221 | this->init_base_object(name, version, object, sym, st_shndx, is_ordinary); |
14bfc3f5 | 222 | this->value_ = sym.get_st_value(); |
ead1e424 ILT |
223 | this->symsize_ = sym.get_st_size(); |
224 | } | |
225 | ||
226 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
227 | // Output_data. | |
228 | ||
229 | template<int size> | |
230 | void | |
2ea97941 ILT |
231 | Sized_symbol<size>::init_output_data(const char* name, const char* version, |
232 | Output_data* od, Value_type value, | |
233 | Size_type symsize, elfcpp::STT type, | |
234 | elfcpp::STB binding, | |
235 | elfcpp::STV visibility, | |
236 | unsigned char nonvis, | |
5146f448 CC |
237 | bool offset_is_from_end, |
238 | bool is_predefined) | |
ead1e424 | 239 | { |
2ea97941 | 240 | this->init_base_output_data(name, version, od, type, binding, visibility, |
5146f448 | 241 | nonvis, offset_is_from_end, is_predefined); |
2ea97941 ILT |
242 | this->value_ = value; |
243 | this->symsize_ = symsize; | |
ead1e424 ILT |
244 | } |
245 | ||
246 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
247 | // Output_segment. | |
248 | ||
249 | template<int size> | |
250 | void | |
2ea97941 ILT |
251 | Sized_symbol<size>::init_output_segment(const char* name, const char* version, |
252 | Output_segment* os, Value_type value, | |
253 | Size_type symsize, elfcpp::STT type, | |
254 | elfcpp::STB binding, | |
255 | elfcpp::STV visibility, | |
256 | unsigned char nonvis, | |
5146f448 CC |
257 | Segment_offset_base offset_base, |
258 | bool is_predefined) | |
ead1e424 | 259 | { |
2ea97941 | 260 | this->init_base_output_segment(name, version, os, type, binding, visibility, |
5146f448 | 261 | nonvis, offset_base, is_predefined); |
2ea97941 ILT |
262 | this->value_ = value; |
263 | this->symsize_ = symsize; | |
ead1e424 ILT |
264 | } |
265 | ||
266 | // Initialize the fields in Sized_symbol for a symbol defined as a | |
267 | // constant. | |
268 | ||
269 | template<int size> | |
270 | void | |
2ea97941 ILT |
271 | Sized_symbol<size>::init_constant(const char* name, const char* version, |
272 | Value_type value, Size_type symsize, | |
273 | elfcpp::STT type, elfcpp::STB binding, | |
5146f448 CC |
274 | elfcpp::STV visibility, unsigned char nonvis, |
275 | bool is_predefined) | |
ead1e424 | 276 | { |
5146f448 CC |
277 | this->init_base_constant(name, version, type, binding, visibility, nonvis, |
278 | is_predefined); | |
2ea97941 ILT |
279 | this->value_ = value; |
280 | this->symsize_ = symsize; | |
14bfc3f5 ILT |
281 | } |
282 | ||
f3e9c5c5 ILT |
283 | // Initialize the fields in Sized_symbol for an undefined symbol. |
284 | ||
285 | template<int size> | |
286 | void | |
2ea97941 ILT |
287 | Sized_symbol<size>::init_undefined(const char* name, const char* version, |
288 | elfcpp::STT type, elfcpp::STB binding, | |
289 | elfcpp::STV visibility, unsigned char nonvis) | |
f3e9c5c5 | 290 | { |
2ea97941 | 291 | this->init_base_undefined(name, version, type, binding, visibility, nonvis); |
f3e9c5c5 ILT |
292 | this->value_ = 0; |
293 | this->symsize_ = 0; | |
294 | } | |
295 | ||
6d1c4efb ILT |
296 | // Return an allocated string holding the symbol's name as |
297 | // name@version. This is used for relocatable links. | |
298 | ||
299 | std::string | |
300 | Symbol::versioned_name() const | |
301 | { | |
302 | gold_assert(this->version_ != NULL); | |
303 | std::string ret = this->name_; | |
304 | ret.push_back('@'); | |
305 | if (this->is_def_) | |
306 | ret.push_back('@'); | |
307 | ret += this->version_; | |
308 | return ret; | |
309 | } | |
310 | ||
8a5e3e08 ILT |
311 | // Return true if SHNDX represents a common symbol. |
312 | ||
313 | bool | |
2ea97941 | 314 | Symbol::is_common_shndx(unsigned int shndx) |
8a5e3e08 | 315 | { |
2ea97941 ILT |
316 | return (shndx == elfcpp::SHN_COMMON |
317 | || shndx == parameters->target().small_common_shndx() | |
318 | || shndx == parameters->target().large_common_shndx()); | |
8a5e3e08 ILT |
319 | } |
320 | ||
c7912668 ILT |
321 | // Allocate a common symbol. |
322 | ||
323 | template<int size> | |
324 | void | |
2ea97941 | 325 | Sized_symbol<size>::allocate_common(Output_data* od, Value_type value) |
c7912668 ILT |
326 | { |
327 | this->allocate_base_common(od); | |
2ea97941 | 328 | this->value_ = value; |
c7912668 ILT |
329 | } |
330 | ||
c82fbeee CS |
331 | // The ""'s around str ensure str is a string literal, so sizeof works. |
332 | #define strprefix(var, str) (strncmp(var, str, sizeof("" str "") - 1) == 0) | |
333 | ||
436ca963 ILT |
334 | // Return true if this symbol should be added to the dynamic symbol |
335 | // table. | |
336 | ||
7b549045 | 337 | bool |
ce97fa81 | 338 | Symbol::should_add_dynsym_entry(Symbol_table* symtab) const |
436ca963 | 339 | { |
badc8139 RÁE |
340 | // If the symbol is only present on plugin files, the plugin decided we |
341 | // don't need it. | |
342 | if (!this->in_real_elf()) | |
343 | return false; | |
344 | ||
436ca963 ILT |
345 | // If the symbol is used by a dynamic relocation, we need to add it. |
346 | if (this->needs_dynsym_entry()) | |
347 | return true; | |
348 | ||
6d03d481 ST |
349 | // If this symbol's section is not added, the symbol need not be added. |
350 | // The section may have been GCed. Note that export_dynamic is being | |
351 | // overridden here. This should not be done for shared objects. | |
352 | if (parameters->options().gc_sections() | |
353 | && !parameters->options().shared() | |
354 | && this->source() == Symbol::FROM_OBJECT | |
355 | && !this->object()->is_dynamic()) | |
356 | { | |
357 | Relobj* relobj = static_cast<Relobj*>(this->object()); | |
358 | bool is_ordinary; | |
2ea97941 ILT |
359 | unsigned int shndx = this->shndx(&is_ordinary); |
360 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF | |
ce97fa81 ST |
361 | && !relobj->is_section_included(shndx) |
362 | && !symtab->is_section_folded(relobj, shndx)) | |
6d03d481 ST |
363 | return false; |
364 | } | |
365 | ||
31821be0 CC |
366 | // If the symbol was forced dynamic in a --dynamic-list file |
367 | // or an --export-dynamic-symbol option, add it. | |
b24fdbf5 CC |
368 | if (!this->is_from_dynobj() |
369 | && (parameters->options().in_dynamic_list(this->name()) | |
370 | || parameters->options().is_export_dynamic_symbol(this->name()))) | |
31821be0 CC |
371 | { |
372 | if (!this->is_forced_local()) | |
373 | return true; | |
374 | gold_warning(_("Cannot export local symbol '%s'"), | |
375 | this->demangled_name().c_str()); | |
376 | return false; | |
377 | } | |
378 | ||
55a93433 ILT |
379 | // If the symbol was forced local in a version script, do not add it. |
380 | if (this->is_forced_local()) | |
381 | return false; | |
382 | ||
c82fbeee CS |
383 | // If dynamic-list-data was specified, add any STT_OBJECT. |
384 | if (parameters->options().dynamic_list_data() | |
385 | && !this->is_from_dynobj() | |
386 | && this->type() == elfcpp::STT_OBJECT) | |
387 | return true; | |
388 | ||
389 | // If --dynamic-list-cpp-new was specified, add any new/delete symbol. | |
390 | // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols. | |
391 | if ((parameters->options().dynamic_list_cpp_new() | |
392 | || parameters->options().dynamic_list_cpp_typeinfo()) | |
393 | && !this->is_from_dynobj()) | |
394 | { | |
395 | // TODO(csilvers): We could probably figure out if we're an operator | |
396 | // new/delete or typeinfo without the need to demangle. | |
2ea97941 ILT |
397 | char* demangled_name = cplus_demangle(this->name(), |
398 | DMGL_ANSI | DMGL_PARAMS); | |
399 | if (demangled_name == NULL) | |
c82fbeee CS |
400 | { |
401 | // Not a C++ symbol, so it can't satisfy these flags | |
402 | } | |
403 | else if (parameters->options().dynamic_list_cpp_new() | |
2ea97941 ILT |
404 | && (strprefix(demangled_name, "operator new") |
405 | || strprefix(demangled_name, "operator delete"))) | |
c82fbeee | 406 | { |
2ea97941 | 407 | free(demangled_name); |
c82fbeee CS |
408 | return true; |
409 | } | |
410 | else if (parameters->options().dynamic_list_cpp_typeinfo() | |
2ea97941 ILT |
411 | && (strprefix(demangled_name, "typeinfo name for") |
412 | || strprefix(demangled_name, "typeinfo for"))) | |
c82fbeee | 413 | { |
2ea97941 | 414 | free(demangled_name); |
c82fbeee CS |
415 | return true; |
416 | } | |
417 | else | |
2ea97941 | 418 | free(demangled_name); |
c82fbeee CS |
419 | } |
420 | ||
436ca963 | 421 | // If exporting all symbols or building a shared library, |
4b889c30 | 422 | // or the symbol should be globally unique (GNU_UNIQUE), |
436ca963 ILT |
423 | // and the symbol is defined in a regular object and is |
424 | // externally visible, we need to add it. | |
4b889c30 IC |
425 | if ((parameters->options().export_dynamic() |
426 | || parameters->options().shared() | |
427 | || (parameters->options().gnu_unique() | |
428 | && this->binding() == elfcpp::STB_GNU_UNIQUE)) | |
436ca963 | 429 | && !this->is_from_dynobj() |
f3ae1b28 | 430 | && !this->is_undefined() |
436ca963 ILT |
431 | && this->is_externally_visible()) |
432 | return true; | |
433 | ||
434 | return false; | |
435 | } | |
436 | ||
b3b74ddc ILT |
437 | // Return true if the final value of this symbol is known at link |
438 | // time. | |
439 | ||
440 | bool | |
441 | Symbol::final_value_is_known() const | |
442 | { | |
443 | // If we are not generating an executable, then no final values are | |
a6a17750 CC |
444 | // known, since they will change at runtime, with the exception of |
445 | // TLS symbols in a position-independent executable. | |
446 | if ((parameters->options().output_is_position_independent() | |
447 | || parameters->options().relocatable()) | |
448 | && !(this->type() == elfcpp::STT_TLS | |
449 | && parameters->options().pie())) | |
b3b74ddc ILT |
450 | return false; |
451 | ||
f3e9c5c5 ILT |
452 | // If the symbol is not from an object file, and is not undefined, |
453 | // then it is defined, and known. | |
b3b74ddc | 454 | if (this->source_ != FROM_OBJECT) |
f3e9c5c5 ILT |
455 | { |
456 | if (this->source_ != IS_UNDEFINED) | |
457 | return true; | |
458 | } | |
459 | else | |
460 | { | |
461 | // If the symbol is from a dynamic object, then the final value | |
462 | // is not known. | |
463 | if (this->object()->is_dynamic()) | |
464 | return false; | |
b3b74ddc | 465 | |
f3e9c5c5 ILT |
466 | // If the symbol is not undefined (it is defined or common), |
467 | // then the final value is known. | |
468 | if (!this->is_undefined()) | |
469 | return true; | |
470 | } | |
b3b74ddc ILT |
471 | |
472 | // If the symbol is undefined, then whether the final value is known | |
473 | // depends on whether we are doing a static link. If we are doing a | |
474 | // dynamic link, then the final value could be filled in at runtime. | |
475 | // This could reasonably be the case for a weak undefined symbol. | |
476 | return parameters->doing_static_link(); | |
477 | } | |
478 | ||
77e65537 | 479 | // Return the output section where this symbol is defined. |
a445fddf | 480 | |
77e65537 ILT |
481 | Output_section* |
482 | Symbol::output_section() const | |
a445fddf ILT |
483 | { |
484 | switch (this->source_) | |
485 | { | |
486 | case FROM_OBJECT: | |
77e65537 | 487 | { |
2ea97941 ILT |
488 | unsigned int shndx = this->u_.from_object.shndx; |
489 | if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_) | |
77e65537 ILT |
490 | { |
491 | gold_assert(!this->u_.from_object.object->is_dynamic()); | |
89fc3421 | 492 | gold_assert(this->u_.from_object.object->pluginobj() == NULL); |
77e65537 | 493 | Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object); |
2ea97941 | 494 | return relobj->output_section(shndx); |
77e65537 ILT |
495 | } |
496 | return NULL; | |
497 | } | |
498 | ||
a445fddf | 499 | case IN_OUTPUT_DATA: |
77e65537 ILT |
500 | return this->u_.in_output_data.output_data->output_section(); |
501 | ||
a445fddf | 502 | case IN_OUTPUT_SEGMENT: |
f3e9c5c5 ILT |
503 | case IS_CONSTANT: |
504 | case IS_UNDEFINED: | |
77e65537 ILT |
505 | return NULL; |
506 | ||
507 | default: | |
508 | gold_unreachable(); | |
509 | } | |
510 | } | |
511 | ||
512 | // Set the symbol's output section. This is used for symbols defined | |
513 | // in scripts. This should only be called after the symbol table has | |
514 | // been finalized. | |
515 | ||
516 | void | |
517 | Symbol::set_output_section(Output_section* os) | |
518 | { | |
519 | switch (this->source_) | |
520 | { | |
521 | case FROM_OBJECT: | |
522 | case IN_OUTPUT_DATA: | |
523 | gold_assert(this->output_section() == os); | |
524 | break; | |
f3e9c5c5 | 525 | case IS_CONSTANT: |
77e65537 ILT |
526 | this->source_ = IN_OUTPUT_DATA; |
527 | this->u_.in_output_data.output_data = os; | |
528 | this->u_.in_output_data.offset_is_from_end = false; | |
529 | break; | |
530 | case IN_OUTPUT_SEGMENT: | |
f3e9c5c5 | 531 | case IS_UNDEFINED: |
a445fddf ILT |
532 | default: |
533 | gold_unreachable(); | |
534 | } | |
535 | } | |
536 | ||
d1bddd3c CC |
537 | // Set the symbol's output segment. This is used for pre-defined |
538 | // symbols whose segments aren't known until after layout is done | |
539 | // (e.g., __ehdr_start). | |
540 | ||
541 | void | |
542 | Symbol::set_output_segment(Output_segment* os, Segment_offset_base base) | |
543 | { | |
544 | gold_assert(this->is_predefined_); | |
545 | this->source_ = IN_OUTPUT_SEGMENT; | |
546 | this->u_.in_output_segment.output_segment = os; | |
547 | this->u_.in_output_segment.offset_base = base; | |
548 | } | |
549 | ||
550 | // Set the symbol to undefined. This is used for pre-defined | |
551 | // symbols whose segments aren't known until after layout is done | |
552 | // (e.g., __ehdr_start). | |
553 | ||
554 | void | |
555 | Symbol::set_undefined() | |
556 | { | |
d1bddd3c CC |
557 | this->source_ = IS_UNDEFINED; |
558 | this->is_predefined_ = false; | |
559 | } | |
560 | ||
14bfc3f5 ILT |
561 | // Class Symbol_table. |
562 | ||
09124467 | 563 | Symbol_table::Symbol_table(unsigned int count, |
2ea97941 | 564 | const Version_script_info& version_script) |
6d013333 | 565 | : saw_undefined_(0), offset_(0), table_(count), namepool_(), |
8a5e3e08 ILT |
566 | forwarders_(), commons_(), tls_commons_(), small_commons_(), |
567 | large_commons_(), forced_locals_(), warnings_(), | |
2ea97941 | 568 | version_script_(version_script), gc_(NULL), icf_(NULL) |
14bfc3f5 | 569 | { |
6d013333 | 570 | namepool_.reserve(count); |
14bfc3f5 ILT |
571 | } |
572 | ||
573 | Symbol_table::~Symbol_table() | |
574 | { | |
575 | } | |
576 | ||
ad8f37d1 ILT |
577 | // The symbol table key equality function. This is called with |
578 | // Stringpool keys. | |
14bfc3f5 | 579 | |
ad8f37d1 | 580 | inline bool |
14bfc3f5 ILT |
581 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, |
582 | const Symbol_table_key& k2) const | |
583 | { | |
584 | return k1.first == k2.first && k1.second == k2.second; | |
585 | } | |
586 | ||
ef15dade | 587 | bool |
2ea97941 | 588 | Symbol_table::is_section_folded(Object* obj, unsigned int shndx) const |
ef15dade | 589 | { |
032ce4e9 | 590 | return (parameters->options().icf_enabled() |
2ea97941 | 591 | && this->icf_->is_section_folded(obj, shndx)); |
ef15dade ST |
592 | } |
593 | ||
31821be0 CC |
594 | // For symbols that have been listed with a -u or --export-dynamic-symbol |
595 | // option, add them to the work list to avoid gc'ing them. | |
6d03d481 ST |
596 | |
597 | void | |
88a4108b | 598 | Symbol_table::gc_mark_undef_symbols(Layout* layout) |
6d03d481 ST |
599 | { |
600 | for (options::String_set::const_iterator p = | |
601 | parameters->options().undefined_begin(); | |
602 | p != parameters->options().undefined_end(); | |
603 | ++p) | |
604 | { | |
2ea97941 ILT |
605 | const char* name = p->c_str(); |
606 | Symbol* sym = this->lookup(name); | |
ca09d69a | 607 | gold_assert(sym != NULL); |
6d03d481 ST |
608 | if (sym->source() == Symbol::FROM_OBJECT |
609 | && !sym->object()->is_dynamic()) | |
610 | { | |
e81fea4d | 611 | this->gc_mark_symbol(sym); |
6d03d481 ST |
612 | } |
613 | } | |
88a4108b | 614 | |
31821be0 CC |
615 | for (options::String_set::const_iterator p = |
616 | parameters->options().export_dynamic_symbol_begin(); | |
617 | p != parameters->options().export_dynamic_symbol_end(); | |
618 | ++p) | |
619 | { | |
620 | const char* name = p->c_str(); | |
621 | Symbol* sym = this->lookup(name); | |
1d5dfe78 CC |
622 | // It's not an error if a symbol named by --export-dynamic-symbol |
623 | // is undefined. | |
624 | if (sym != NULL | |
625 | && sym->source() == Symbol::FROM_OBJECT | |
31821be0 CC |
626 | && !sym->object()->is_dynamic()) |
627 | { | |
e81fea4d | 628 | this->gc_mark_symbol(sym); |
31821be0 CC |
629 | } |
630 | } | |
631 | ||
88a4108b ILT |
632 | for (Script_options::referenced_const_iterator p = |
633 | layout->script_options()->referenced_begin(); | |
634 | p != layout->script_options()->referenced_end(); | |
635 | ++p) | |
636 | { | |
637 | Symbol* sym = this->lookup(p->c_str()); | |
638 | gold_assert(sym != NULL); | |
639 | if (sym->source() == Symbol::FROM_OBJECT | |
640 | && !sym->object()->is_dynamic()) | |
641 | { | |
e81fea4d | 642 | this->gc_mark_symbol(sym); |
88a4108b ILT |
643 | } |
644 | } | |
6d03d481 ST |
645 | } |
646 | ||
647 | void | |
7257cc92 | 648 | Symbol_table::gc_mark_symbol(Symbol* sym) |
6d03d481 | 649 | { |
7257cc92 | 650 | // Add the object and section to the work list. |
7257cc92 ST |
651 | bool is_ordinary; |
652 | unsigned int shndx = sym->shndx(&is_ordinary); | |
653 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF) | |
6d03d481 | 654 | { |
7257cc92 | 655 | gold_assert(this->gc_!= NULL); |
4277535c | 656 | this->gc_->worklist().push_back(Section_id(sym->object(), shndx)); |
6d03d481 | 657 | } |
e81fea4d | 658 | parameters->target().gc_mark_symbol(this, sym); |
6d03d481 ST |
659 | } |
660 | ||
661 | // When doing garbage collection, keep symbols that have been seen in | |
662 | // dynamic objects. | |
663 | inline void | |
664 | Symbol_table::gc_mark_dyn_syms(Symbol* sym) | |
665 | { | |
666 | if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT | |
667 | && !sym->object()->is_dynamic()) | |
7257cc92 | 668 | this->gc_mark_symbol(sym); |
6d03d481 ST |
669 | } |
670 | ||
dd8670e5 | 671 | // Make TO a symbol which forwards to FROM. |
14bfc3f5 ILT |
672 | |
673 | void | |
674 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) | |
675 | { | |
a3ad94ed ILT |
676 | gold_assert(from != to); |
677 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); | |
14bfc3f5 ILT |
678 | this->forwarders_[from] = to; |
679 | from->set_forwarder(); | |
680 | } | |
681 | ||
61ba1cf9 ILT |
682 | // Resolve the forwards from FROM, returning the real symbol. |
683 | ||
14bfc3f5 | 684 | Symbol* |
c06b7b0b | 685 | Symbol_table::resolve_forwards(const Symbol* from) const |
14bfc3f5 | 686 | { |
a3ad94ed | 687 | gold_assert(from->is_forwarder()); |
c06b7b0b | 688 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
14bfc3f5 | 689 | this->forwarders_.find(from); |
a3ad94ed | 690 | gold_assert(p != this->forwarders_.end()); |
14bfc3f5 ILT |
691 | return p->second; |
692 | } | |
693 | ||
61ba1cf9 ILT |
694 | // Look up a symbol by name. |
695 | ||
696 | Symbol* | |
2ea97941 | 697 | Symbol_table::lookup(const char* name, const char* version) const |
61ba1cf9 | 698 | { |
f0641a0b | 699 | Stringpool::Key name_key; |
2ea97941 ILT |
700 | name = this->namepool_.find(name, &name_key); |
701 | if (name == NULL) | |
61ba1cf9 | 702 | return NULL; |
f0641a0b ILT |
703 | |
704 | Stringpool::Key version_key = 0; | |
2ea97941 | 705 | if (version != NULL) |
61ba1cf9 | 706 | { |
2ea97941 ILT |
707 | version = this->namepool_.find(version, &version_key); |
708 | if (version == NULL) | |
61ba1cf9 ILT |
709 | return NULL; |
710 | } | |
711 | ||
f0641a0b | 712 | Symbol_table_key key(name_key, version_key); |
61ba1cf9 ILT |
713 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
714 | if (p == this->table_.end()) | |
715 | return NULL; | |
716 | return p->second; | |
717 | } | |
718 | ||
14bfc3f5 ILT |
719 | // Resolve a Symbol with another Symbol. This is only used in the |
720 | // unusual case where there are references to both an unversioned | |
721 | // symbol and a symbol with a version, and we then discover that that | |
1564db8d ILT |
722 | // version is the default version. Because this is unusual, we do |
723 | // this the slow way, by converting back to an ELF symbol. | |
14bfc3f5 | 724 | |
1564db8d | 725 | template<int size, bool big_endian> |
14bfc3f5 | 726 | void |
95d14cd3 | 727 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from) |
14bfc3f5 | 728 | { |
1564db8d ILT |
729 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
730 | elfcpp::Sym_write<size, big_endian> esym(buf); | |
d491d34e | 731 | // We don't bother to set the st_name or the st_shndx field. |
1564db8d ILT |
732 | esym.put_st_value(from->value()); |
733 | esym.put_st_size(from->symsize()); | |
734 | esym.put_st_info(from->binding(), from->type()); | |
ead1e424 | 735 | esym.put_st_other(from->visibility(), from->nonvis()); |
d491d34e | 736 | bool is_ordinary; |
2ea97941 ILT |
737 | unsigned int shndx = from->shndx(&is_ordinary); |
738 | this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(), | |
95d14cd3 | 739 | from->version()); |
1ebd95fd ILT |
740 | if (from->in_reg()) |
741 | to->set_in_reg(); | |
742 | if (from->in_dyn()) | |
743 | to->set_in_dyn(); | |
6d03d481 ST |
744 | if (parameters->options().gc_sections()) |
745 | this->gc_mark_dyn_syms(to); | |
14bfc3f5 ILT |
746 | } |
747 | ||
0602e05a ILT |
748 | // Record that a symbol is forced to be local by a version script or |
749 | // by visibility. | |
55a93433 ILT |
750 | |
751 | void | |
752 | Symbol_table::force_local(Symbol* sym) | |
753 | { | |
754 | if (!sym->is_defined() && !sym->is_common()) | |
755 | return; | |
756 | if (sym->is_forced_local()) | |
757 | { | |
758 | // We already got this one. | |
759 | return; | |
760 | } | |
761 | sym->set_is_forced_local(); | |
762 | this->forced_locals_.push_back(sym); | |
763 | } | |
764 | ||
0864d551 ILT |
765 | // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This |
766 | // is only called for undefined symbols, when at least one --wrap | |
767 | // option was used. | |
768 | ||
769 | const char* | |
2ea97941 | 770 | Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key) |
0864d551 ILT |
771 | { |
772 | // For some targets, we need to ignore a specific character when | |
773 | // wrapping, and add it back later. | |
774 | char prefix = '\0'; | |
2ea97941 | 775 | if (name[0] == parameters->target().wrap_char()) |
0864d551 | 776 | { |
2ea97941 ILT |
777 | prefix = name[0]; |
778 | ++name; | |
0864d551 ILT |
779 | } |
780 | ||
2ea97941 | 781 | if (parameters->options().is_wrap(name)) |
0864d551 ILT |
782 | { |
783 | // Turn NAME into __wrap_NAME. | |
784 | std::string s; | |
785 | if (prefix != '\0') | |
786 | s += prefix; | |
787 | s += "__wrap_"; | |
2ea97941 | 788 | s += name; |
0864d551 ILT |
789 | |
790 | // This will give us both the old and new name in NAMEPOOL_, but | |
791 | // that is OK. Only the versions we need will wind up in the | |
792 | // real string table in the output file. | |
793 | return this->namepool_.add(s.c_str(), true, name_key); | |
794 | } | |
795 | ||
796 | const char* const real_prefix = "__real_"; | |
797 | const size_t real_prefix_length = strlen(real_prefix); | |
2ea97941 ILT |
798 | if (strncmp(name, real_prefix, real_prefix_length) == 0 |
799 | && parameters->options().is_wrap(name + real_prefix_length)) | |
0864d551 ILT |
800 | { |
801 | // Turn __real_NAME into NAME. | |
802 | std::string s; | |
803 | if (prefix != '\0') | |
804 | s += prefix; | |
2ea97941 | 805 | s += name + real_prefix_length; |
0864d551 ILT |
806 | return this->namepool_.add(s.c_str(), true, name_key); |
807 | } | |
808 | ||
2ea97941 | 809 | return name; |
0864d551 ILT |
810 | } |
811 | ||
8c500701 ILT |
812 | // This is called when we see a symbol NAME/VERSION, and the symbol |
813 | // already exists in the symbol table, and VERSION is marked as being | |
814 | // the default version. SYM is the NAME/VERSION symbol we just added. | |
815 | // DEFAULT_IS_NEW is true if this is the first time we have seen the | |
816 | // symbol NAME/NULL. PDEF points to the entry for NAME/NULL. | |
817 | ||
818 | template<int size, bool big_endian> | |
819 | void | |
820 | Symbol_table::define_default_version(Sized_symbol<size>* sym, | |
821 | bool default_is_new, | |
822 | Symbol_table_type::iterator pdef) | |
823 | { | |
824 | if (default_is_new) | |
825 | { | |
826 | // This is the first time we have seen NAME/NULL. Make | |
827 | // NAME/NULL point to NAME/VERSION, and mark SYM as the default | |
828 | // version. | |
829 | pdef->second = sym; | |
830 | sym->set_is_default(); | |
831 | } | |
832 | else if (pdef->second == sym) | |
833 | { | |
834 | // NAME/NULL already points to NAME/VERSION. Don't mark the | |
835 | // symbol as the default if it is not already the default. | |
836 | } | |
837 | else | |
838 | { | |
839 | // This is the unfortunate case where we already have entries | |
840 | // for both NAME/VERSION and NAME/NULL. We now see a symbol | |
841 | // NAME/VERSION where VERSION is the default version. We have | |
842 | // already resolved this new symbol with the existing | |
843 | // NAME/VERSION symbol. | |
844 | ||
845 | // It's possible that NAME/NULL and NAME/VERSION are both | |
846 | // defined in regular objects. This can only happen if one | |
847 | // object file defines foo and another defines foo@@ver. This | |
848 | // is somewhat obscure, but we call it a multiple definition | |
849 | // error. | |
850 | ||
851 | // It's possible that NAME/NULL actually has a version, in which | |
852 | // case it won't be the same as VERSION. This happens with | |
853 | // ver_test_7.so in the testsuite for the symbol t2_2. We see | |
854 | // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We | |
855 | // then see an unadorned t2_2 in an object file and give it | |
856 | // version VER1 from the version script. This looks like a | |
857 | // default definition for VER1, so it looks like we should merge | |
858 | // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's | |
859 | // not obvious that this is an error, either. So we just punt. | |
860 | ||
861 | // If one of the symbols has non-default visibility, and the | |
862 | // other is defined in a shared object, then they are different | |
863 | // symbols. | |
864 | ||
865 | // Otherwise, we just resolve the symbols as though they were | |
866 | // the same. | |
867 | ||
868 | if (pdef->second->version() != NULL) | |
869 | gold_assert(pdef->second->version() != sym->version()); | |
870 | else if (sym->visibility() != elfcpp::STV_DEFAULT | |
871 | && pdef->second->is_from_dynobj()) | |
872 | ; | |
873 | else if (pdef->second->visibility() != elfcpp::STV_DEFAULT | |
874 | && sym->is_from_dynobj()) | |
875 | ; | |
876 | else | |
877 | { | |
878 | const Sized_symbol<size>* symdef; | |
879 | symdef = this->get_sized_symbol<size>(pdef->second); | |
880 | Symbol_table::resolve<size, big_endian>(sym, symdef); | |
881 | this->make_forwarder(pdef->second, sym); | |
882 | pdef->second = sym; | |
883 | sym->set_is_default(); | |
884 | } | |
885 | } | |
886 | } | |
887 | ||
14bfc3f5 ILT |
888 | // Add one symbol from OBJECT to the symbol table. NAME is symbol |
889 | // name and VERSION is the version; both are canonicalized. DEF is | |
d491d34e ILT |
890 | // whether this is the default version. ST_SHNDX is the symbol's |
891 | // section index; IS_ORDINARY is whether this is a normal section | |
892 | // rather than a special code. | |
14bfc3f5 | 893 | |
8781f709 ILT |
894 | // If IS_DEFAULT_VERSION is true, then this is the definition of a |
895 | // default version of a symbol. That means that any lookup of | |
896 | // NAME/NULL and any lookup of NAME/VERSION should always return the | |
897 | // same symbol. This is obvious for references, but in particular we | |
898 | // want to do this for definitions: overriding NAME/NULL should also | |
899 | // override NAME/VERSION. If we don't do that, it would be very hard | |
900 | // to override functions in a shared library which uses versioning. | |
14bfc3f5 ILT |
901 | |
902 | // We implement this by simply making both entries in the hash table | |
903 | // point to the same Symbol structure. That is easy enough if this is | |
904 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible | |
905 | // that we have seen both already, in which case they will both have | |
906 | // independent entries in the symbol table. We can't simply change | |
907 | // the symbol table entry, because we have pointers to the entries | |
908 | // attached to the object files. So we mark the entry attached to the | |
909 | // object file as a forwarder, and record it in the forwarders_ map. | |
910 | // Note that entries in the hash table will never be marked as | |
911 | // forwarders. | |
70e654ba | 912 | // |
d491d34e ILT |
913 | // ORIG_ST_SHNDX and ST_SHNDX are almost always the same. |
914 | // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF | |
915 | // for a special section code. ST_SHNDX may be modified if the symbol | |
916 | // is defined in a section being discarded. | |
14bfc3f5 ILT |
917 | |
918 | template<int size, bool big_endian> | |
aeddab66 | 919 | Sized_symbol<size>* |
2ea97941 | 920 | Symbol_table::add_from_object(Object* object, |
ca09d69a | 921 | const char* name, |
f0641a0b | 922 | Stringpool::Key name_key, |
ca09d69a | 923 | const char* version, |
f0641a0b | 924 | Stringpool::Key version_key, |
8781f709 | 925 | bool is_default_version, |
70e654ba | 926 | const elfcpp::Sym<size, big_endian>& sym, |
d491d34e ILT |
927 | unsigned int st_shndx, |
928 | bool is_ordinary, | |
929 | unsigned int orig_st_shndx) | |
14bfc3f5 | 930 | { |
c5818ff1 | 931 | // Print a message if this symbol is being traced. |
2ea97941 | 932 | if (parameters->options().is_trace_symbol(name)) |
c5818ff1 | 933 | { |
d491d34e | 934 | if (orig_st_shndx == elfcpp::SHN_UNDEF) |
2ea97941 | 935 | gold_info(_("%s: reference to %s"), object->name().c_str(), name); |
c5818ff1 | 936 | else |
2ea97941 | 937 | gold_info(_("%s: definition of %s"), object->name().c_str(), name); |
c5818ff1 CC |
938 | } |
939 | ||
0864d551 ILT |
940 | // For an undefined symbol, we may need to adjust the name using |
941 | // --wrap. | |
d491d34e | 942 | if (orig_st_shndx == elfcpp::SHN_UNDEF |
c5818ff1 | 943 | && parameters->options().any_wrap()) |
0864d551 | 944 | { |
2ea97941 ILT |
945 | const char* wrap_name = this->wrap_symbol(name, &name_key); |
946 | if (wrap_name != name) | |
0864d551 ILT |
947 | { |
948 | // If we see a reference to malloc with version GLIBC_2.0, | |
949 | // and we turn it into a reference to __wrap_malloc, then we | |
950 | // discard the version number. Otherwise the user would be | |
951 | // required to specify the correct version for | |
952 | // __wrap_malloc. | |
2ea97941 | 953 | version = NULL; |
0864d551 | 954 | version_key = 0; |
2ea97941 | 955 | name = wrap_name; |
0864d551 ILT |
956 | } |
957 | } | |
958 | ||
14bfc3f5 ILT |
959 | Symbol* const snull = NULL; |
960 | std::pair<typename Symbol_table_type::iterator, bool> ins = | |
f0641a0b ILT |
961 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
962 | snull)); | |
14bfc3f5 | 963 | |
8781f709 | 964 | std::pair<typename Symbol_table_type::iterator, bool> insdefault = |
14bfc3f5 | 965 | std::make_pair(this->table_.end(), false); |
8781f709 | 966 | if (is_default_version) |
14bfc3f5 | 967 | { |
f0641a0b | 968 | const Stringpool::Key vnull_key = 0; |
8781f709 ILT |
969 | insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key, |
970 | vnull_key), | |
971 | snull)); | |
14bfc3f5 ILT |
972 | } |
973 | ||
974 | // ins.first: an iterator, which is a pointer to a pair. | |
975 | // ins.first->first: the key (a pair of name and version). | |
976 | // ins.first->second: the value (Symbol*). | |
977 | // ins.second: true if new entry was inserted, false if not. | |
978 | ||
1564db8d | 979 | Sized_symbol<size>* ret; |
ead1e424 ILT |
980 | bool was_undefined; |
981 | bool was_common; | |
14bfc3f5 ILT |
982 | if (!ins.second) |
983 | { | |
984 | // We already have an entry for NAME/VERSION. | |
7d1a9ebb | 985 | ret = this->get_sized_symbol<size>(ins.first->second); |
a3ad94ed | 986 | gold_assert(ret != NULL); |
ead1e424 ILT |
987 | |
988 | was_undefined = ret->is_undefined(); | |
1707f183 CC |
989 | // Commons from plugins are just placeholders. |
990 | was_common = ret->is_common() && ret->object()->pluginobj() == NULL; | |
ead1e424 | 991 | |
2ea97941 ILT |
992 | this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object, |
993 | version); | |
6d03d481 ST |
994 | if (parameters->options().gc_sections()) |
995 | this->gc_mark_dyn_syms(ret); | |
14bfc3f5 | 996 | |
8781f709 ILT |
997 | if (is_default_version) |
998 | this->define_default_version<size, big_endian>(ret, insdefault.second, | |
999 | insdefault.first); | |
14bfc3f5 ILT |
1000 | } |
1001 | else | |
1002 | { | |
1003 | // This is the first time we have seen NAME/VERSION. | |
a3ad94ed | 1004 | gold_assert(ins.first->second == NULL); |
ead1e424 | 1005 | |
8781f709 | 1006 | if (is_default_version && !insdefault.second) |
14bfc3f5 | 1007 | { |
14b31740 ILT |
1008 | // We already have an entry for NAME/NULL. If we override |
1009 | // it, then change it to NAME/VERSION. | |
8781f709 | 1010 | ret = this->get_sized_symbol<size>(insdefault.first->second); |
18e6b24e ILT |
1011 | |
1012 | was_undefined = ret->is_undefined(); | |
1707f183 CC |
1013 | // Commons from plugins are just placeholders. |
1014 | was_common = ret->is_common() && ret->object()->pluginobj() == NULL; | |
18e6b24e | 1015 | |
2ea97941 ILT |
1016 | this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object, |
1017 | version); | |
6d03d481 ST |
1018 | if (parameters->options().gc_sections()) |
1019 | this->gc_mark_dyn_syms(ret); | |
14bfc3f5 ILT |
1020 | ins.first->second = ret; |
1021 | } | |
1022 | else | |
1023 | { | |
18e6b24e ILT |
1024 | was_undefined = false; |
1025 | was_common = false; | |
1026 | ||
f6ce93d6 | 1027 | Sized_target<size, big_endian>* target = |
029ba973 | 1028 | parameters->sized_target<size, big_endian>(); |
1564db8d ILT |
1029 | if (!target->has_make_symbol()) |
1030 | ret = new Sized_symbol<size>(); | |
1031 | else | |
14bfc3f5 | 1032 | { |
1564db8d ILT |
1033 | ret = target->make_symbol(); |
1034 | if (ret == NULL) | |
14bfc3f5 ILT |
1035 | { |
1036 | // This means that we don't want a symbol table | |
1037 | // entry after all. | |
8781f709 | 1038 | if (!is_default_version) |
14bfc3f5 ILT |
1039 | this->table_.erase(ins.first); |
1040 | else | |
1041 | { | |
8781f709 ILT |
1042 | this->table_.erase(insdefault.first); |
1043 | // Inserting INSDEFAULT invalidated INS. | |
f0641a0b ILT |
1044 | this->table_.erase(std::make_pair(name_key, |
1045 | version_key)); | |
14bfc3f5 ILT |
1046 | } |
1047 | return NULL; | |
1048 | } | |
1049 | } | |
14bfc3f5 | 1050 | |
2ea97941 | 1051 | ret->init_object(name, version, object, sym, st_shndx, is_ordinary); |
1564db8d | 1052 | |
14bfc3f5 | 1053 | ins.first->second = ret; |
8781f709 | 1054 | if (is_default_version) |
14bfc3f5 ILT |
1055 | { |
1056 | // This is the first time we have seen NAME/NULL. Point | |
1057 | // it at the new entry for NAME/VERSION. | |
8781f709 ILT |
1058 | gold_assert(insdefault.second); |
1059 | insdefault.first->second = ret; | |
14bfc3f5 ILT |
1060 | } |
1061 | } | |
8c500701 | 1062 | |
8781f709 | 1063 | if (is_default_version) |
8c500701 | 1064 | ret->set_is_default(); |
14bfc3f5 ILT |
1065 | } |
1066 | ||
ead1e424 ILT |
1067 | // Record every time we see a new undefined symbol, to speed up |
1068 | // archive groups. | |
1069 | if (!was_undefined && ret->is_undefined()) | |
0f3b89d8 ILT |
1070 | { |
1071 | ++this->saw_undefined_; | |
1072 | if (parameters->options().has_plugins()) | |
1073 | parameters->options().plugins()->new_undefined_symbol(ret); | |
1074 | } | |
ead1e424 ILT |
1075 | |
1076 | // Keep track of common symbols, to speed up common symbol | |
1707f183 CC |
1077 | // allocation. Don't record commons from plugin objects; |
1078 | // we need to wait until we see the real symbol in the | |
1079 | // replacement file. | |
1080 | if (!was_common && ret->is_common() && ret->object()->pluginobj() == NULL) | |
155a0dd7 | 1081 | { |
8a5e3e08 | 1082 | if (ret->type() == elfcpp::STT_TLS) |
155a0dd7 | 1083 | this->tls_commons_.push_back(ret); |
8a5e3e08 ILT |
1084 | else if (!is_ordinary |
1085 | && st_shndx == parameters->target().small_common_shndx()) | |
1086 | this->small_commons_.push_back(ret); | |
1087 | else if (!is_ordinary | |
1088 | && st_shndx == parameters->target().large_common_shndx()) | |
1089 | this->large_commons_.push_back(ret); | |
1090 | else | |
1091 | this->commons_.push_back(ret); | |
155a0dd7 | 1092 | } |
ead1e424 | 1093 | |
0602e05a ILT |
1094 | // If we're not doing a relocatable link, then any symbol with |
1095 | // hidden or internal visibility is local. | |
1096 | if ((ret->visibility() == elfcpp::STV_HIDDEN | |
1097 | || ret->visibility() == elfcpp::STV_INTERNAL) | |
1098 | && (ret->binding() == elfcpp::STB_GLOBAL | |
adcf2816 | 1099 | || ret->binding() == elfcpp::STB_GNU_UNIQUE |
0602e05a ILT |
1100 | || ret->binding() == elfcpp::STB_WEAK) |
1101 | && !parameters->options().relocatable()) | |
1102 | this->force_local(ret); | |
1103 | ||
14bfc3f5 ILT |
1104 | return ret; |
1105 | } | |
1106 | ||
f6ce93d6 | 1107 | // Add all the symbols in a relocatable object to the hash table. |
14bfc3f5 ILT |
1108 | |
1109 | template<int size, bool big_endian> | |
1110 | void | |
dbe717ef | 1111 | Symbol_table::add_from_relobj( |
6fa2a40b | 1112 | Sized_relobj_file<size, big_endian>* relobj, |
f6ce93d6 | 1113 | const unsigned char* syms, |
14bfc3f5 | 1114 | size_t count, |
d491d34e | 1115 | size_t symndx_offset, |
14bfc3f5 ILT |
1116 | const char* sym_names, |
1117 | size_t sym_name_size, | |
6fa2a40b | 1118 | typename Sized_relobj_file<size, big_endian>::Symbols* sympointers, |
ca09d69a | 1119 | size_t* defined) |
14bfc3f5 | 1120 | { |
92de84a6 ILT |
1121 | *defined = 0; |
1122 | ||
8851ecca | 1123 | gold_assert(size == parameters->target().get_size()); |
14bfc3f5 | 1124 | |
a783673b ILT |
1125 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
1126 | ||
88dd47ac ILT |
1127 | const bool just_symbols = relobj->just_symbols(); |
1128 | ||
f6ce93d6 | 1129 | const unsigned char* p = syms; |
a783673b | 1130 | for (size_t i = 0; i < count; ++i, p += sym_size) |
14bfc3f5 | 1131 | { |
92de84a6 ILT |
1132 | (*sympointers)[i] = NULL; |
1133 | ||
14bfc3f5 ILT |
1134 | elfcpp::Sym<size, big_endian> sym(p); |
1135 | ||
d491d34e | 1136 | unsigned int st_name = sym.get_st_name(); |
14bfc3f5 ILT |
1137 | if (st_name >= sym_name_size) |
1138 | { | |
75f2446e ILT |
1139 | relobj->error(_("bad global symbol name offset %u at %zu"), |
1140 | st_name, i); | |
1141 | continue; | |
14bfc3f5 ILT |
1142 | } |
1143 | ||
2ea97941 | 1144 | const char* name = sym_names + st_name; |
dbe717ef | 1145 | |
7cd4e5b7 AM |
1146 | if (strcmp (name, "__gnu_lto_slim") == 0) |
1147 | gold_info(_("%s: plugin needed to handle lto object"), | |
1148 | relobj->name().c_str()); | |
1149 | ||
d491d34e ILT |
1150 | bool is_ordinary; |
1151 | unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset, | |
1152 | sym.get_st_shndx(), | |
1153 | &is_ordinary); | |
1154 | unsigned int orig_st_shndx = st_shndx; | |
1155 | if (!is_ordinary) | |
1156 | orig_st_shndx = elfcpp::SHN_UNDEF; | |
1157 | ||
92de84a6 ILT |
1158 | if (st_shndx != elfcpp::SHN_UNDEF) |
1159 | ++*defined; | |
1160 | ||
a783673b ILT |
1161 | // A symbol defined in a section which we are not including must |
1162 | // be treated as an undefined symbol. | |
880cd20d | 1163 | bool is_defined_in_discarded_section = false; |
a783673b | 1164 | if (st_shndx != elfcpp::SHN_UNDEF |
d491d34e | 1165 | && is_ordinary |
ce97fa81 ST |
1166 | && !relobj->is_section_included(st_shndx) |
1167 | && !this->is_section_folded(relobj, st_shndx)) | |
880cd20d ILT |
1168 | { |
1169 | st_shndx = elfcpp::SHN_UNDEF; | |
1170 | is_defined_in_discarded_section = true; | |
1171 | } | |
a783673b | 1172 | |
14bfc3f5 ILT |
1173 | // In an object file, an '@' in the name separates the symbol |
1174 | // name from the version name. If there are two '@' characters, | |
1175 | // this is the default version. | |
2ea97941 | 1176 | const char* ver = strchr(name, '@'); |
057ead22 | 1177 | Stringpool::Key ver_key = 0; |
09124467 | 1178 | int namelen = 0; |
8781f709 ILT |
1179 | // IS_DEFAULT_VERSION: is the version default? |
1180 | // IS_FORCED_LOCAL: is the symbol forced local? | |
1181 | bool is_default_version = false; | |
1182 | bool is_forced_local = false; | |
09124467 | 1183 | |
a7dac153 CC |
1184 | // FIXME: For incremental links, we don't store version information, |
1185 | // so we need to ignore version symbols for now. | |
1186 | if (parameters->incremental_update() && ver != NULL) | |
1187 | { | |
1188 | namelen = ver - name; | |
1189 | ver = NULL; | |
1190 | } | |
1191 | ||
09124467 ILT |
1192 | if (ver != NULL) |
1193 | { | |
1194 | // The symbol name is of the form foo@VERSION or foo@@VERSION | |
2ea97941 | 1195 | namelen = ver - name; |
09124467 ILT |
1196 | ++ver; |
1197 | if (*ver == '@') | |
1198 | { | |
8781f709 | 1199 | is_default_version = true; |
09124467 ILT |
1200 | ++ver; |
1201 | } | |
057ead22 | 1202 | ver = this->namepool_.add(ver, true, &ver_key); |
09124467 | 1203 | } |
5871526f ILT |
1204 | // We don't want to assign a version to an undefined symbol, |
1205 | // even if it is listed in the version script. FIXME: What | |
1206 | // about a common symbol? | |
057ead22 ILT |
1207 | else |
1208 | { | |
2ea97941 | 1209 | namelen = strlen(name); |
057ead22 ILT |
1210 | if (!this->version_script_.empty() |
1211 | && st_shndx != elfcpp::SHN_UNDEF) | |
1212 | { | |
1213 | // The symbol name did not have a version, but the | |
1214 | // version script may assign a version anyway. | |
2ea97941 | 1215 | std::string version; |
98e090bd ILT |
1216 | bool is_global; |
1217 | if (this->version_script_.get_symbol_version(name, &version, | |
1218 | &is_global)) | |
057ead22 | 1219 | { |
98e090bd ILT |
1220 | if (!is_global) |
1221 | is_forced_local = true; | |
1222 | else if (!version.empty()) | |
057ead22 | 1223 | { |
2ea97941 ILT |
1224 | ver = this->namepool_.add_with_length(version.c_str(), |
1225 | version.length(), | |
057ead22 ILT |
1226 | true, |
1227 | &ver_key); | |
8781f709 | 1228 | is_default_version = true; |
057ead22 ILT |
1229 | } |
1230 | } | |
057ead22 ILT |
1231 | } |
1232 | } | |
14bfc3f5 | 1233 | |
d491d34e ILT |
1234 | elfcpp::Sym<size, big_endian>* psym = &sym; |
1235 | unsigned char symbuf[sym_size]; | |
1236 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
88dd47ac ILT |
1237 | if (just_symbols) |
1238 | { | |
d491d34e | 1239 | memcpy(symbuf, p, sym_size); |
88dd47ac | 1240 | elfcpp::Sym_write<size, big_endian> sw(symbuf); |
9590bf25 CC |
1241 | if (orig_st_shndx != elfcpp::SHN_UNDEF |
1242 | && is_ordinary | |
1243 | && relobj->e_type() == elfcpp::ET_REL) | |
88dd47ac | 1244 | { |
9590bf25 CC |
1245 | // Symbol values in relocatable object files are section |
1246 | // relative. This is normally what we want, but since here | |
1247 | // we are converting the symbol to absolute we need to add | |
1248 | // the section address. The section address in an object | |
88dd47ac ILT |
1249 | // file is normally zero, but people can use a linker |
1250 | // script to change it. | |
d491d34e ILT |
1251 | sw.put_st_value(sym.get_st_value() |
1252 | + relobj->section_address(orig_st_shndx)); | |
88dd47ac | 1253 | } |
d491d34e ILT |
1254 | st_shndx = elfcpp::SHN_ABS; |
1255 | is_ordinary = false; | |
88dd47ac ILT |
1256 | psym = &sym2; |
1257 | } | |
1258 | ||
65514900 | 1259 | // Fix up visibility if object has no-export set. |
1c74fab0 ILT |
1260 | if (relobj->no_export() |
1261 | && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary)) | |
65514900 CC |
1262 | { |
1263 | // We may have copied symbol already above. | |
1264 | if (psym != &sym2) | |
1265 | { | |
1266 | memcpy(symbuf, p, sym_size); | |
1267 | psym = &sym2; | |
1268 | } | |
1269 | ||
1270 | elfcpp::STV visibility = sym2.get_st_visibility(); | |
1271 | if (visibility == elfcpp::STV_DEFAULT | |
1272 | || visibility == elfcpp::STV_PROTECTED) | |
1273 | { | |
1274 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
1275 | unsigned char nonvis = sym2.get_st_nonvis(); | |
1276 | sw.put_st_other(elfcpp::STV_HIDDEN, nonvis); | |
1277 | } | |
1278 | } | |
1279 | ||
057ead22 | 1280 | Stringpool::Key name_key; |
2ea97941 | 1281 | name = this->namepool_.add_with_length(name, namelen, true, |
057ead22 ILT |
1282 | &name_key); |
1283 | ||
aeddab66 | 1284 | Sized_symbol<size>* res; |
2ea97941 | 1285 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
8781f709 ILT |
1286 | is_default_version, *psym, st_shndx, |
1287 | is_ordinary, orig_st_shndx); | |
6d03d481 | 1288 | |
804eb480 ST |
1289 | if (is_forced_local) |
1290 | this->force_local(res); | |
1291 | ||
7257cc92 ST |
1292 | // Do not treat this symbol as garbage if this symbol will be |
1293 | // exported to the dynamic symbol table. This is true when | |
1294 | // building a shared library or using --export-dynamic and | |
1295 | // the symbol is externally visible. | |
1296 | if (parameters->options().gc_sections() | |
1297 | && res->is_externally_visible() | |
1298 | && !res->is_from_dynobj() | |
1299 | && (parameters->options().shared() | |
fd834e57 CC |
1300 | || parameters->options().export_dynamic() |
1301 | || parameters->options().in_dynamic_list(res->name()))) | |
7257cc92 | 1302 | this->gc_mark_symbol(res); |
f0641a0b | 1303 | |
880cd20d ILT |
1304 | if (is_defined_in_discarded_section) |
1305 | res->set_is_defined_in_discarded_section(); | |
1306 | ||
730cdc88 | 1307 | (*sympointers)[i] = res; |
14bfc3f5 ILT |
1308 | } |
1309 | } | |
1310 | ||
89fc3421 CC |
1311 | // Add a symbol from a plugin-claimed file. |
1312 | ||
1313 | template<int size, bool big_endian> | |
1314 | Symbol* | |
1315 | Symbol_table::add_from_pluginobj( | |
1316 | Sized_pluginobj<size, big_endian>* obj, | |
2ea97941 | 1317 | const char* name, |
89fc3421 CC |
1318 | const char* ver, |
1319 | elfcpp::Sym<size, big_endian>* sym) | |
1320 | { | |
1321 | unsigned int st_shndx = sym->get_st_shndx(); | |
24998053 | 1322 | bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE; |
89fc3421 CC |
1323 | |
1324 | Stringpool::Key ver_key = 0; | |
8781f709 ILT |
1325 | bool is_default_version = false; |
1326 | bool is_forced_local = false; | |
89fc3421 CC |
1327 | |
1328 | if (ver != NULL) | |
1329 | { | |
1330 | ver = this->namepool_.add(ver, true, &ver_key); | |
1331 | } | |
1332 | // We don't want to assign a version to an undefined symbol, | |
1333 | // even if it is listed in the version script. FIXME: What | |
1334 | // about a common symbol? | |
1335 | else | |
1336 | { | |
1337 | if (!this->version_script_.empty() | |
1338 | && st_shndx != elfcpp::SHN_UNDEF) | |
1339 | { | |
1340 | // The symbol name did not have a version, but the | |
1341 | // version script may assign a version anyway. | |
2ea97941 | 1342 | std::string version; |
98e090bd ILT |
1343 | bool is_global; |
1344 | if (this->version_script_.get_symbol_version(name, &version, | |
1345 | &is_global)) | |
89fc3421 | 1346 | { |
98e090bd ILT |
1347 | if (!is_global) |
1348 | is_forced_local = true; | |
1349 | else if (!version.empty()) | |
89fc3421 | 1350 | { |
2ea97941 ILT |
1351 | ver = this->namepool_.add_with_length(version.c_str(), |
1352 | version.length(), | |
89fc3421 CC |
1353 | true, |
1354 | &ver_key); | |
8781f709 | 1355 | is_default_version = true; |
89fc3421 CC |
1356 | } |
1357 | } | |
89fc3421 CC |
1358 | } |
1359 | } | |
1360 | ||
1361 | Stringpool::Key name_key; | |
2ea97941 | 1362 | name = this->namepool_.add(name, true, &name_key); |
89fc3421 CC |
1363 | |
1364 | Sized_symbol<size>* res; | |
2ea97941 | 1365 | res = this->add_from_object(obj, name, name_key, ver, ver_key, |
8781f709 ILT |
1366 | is_default_version, *sym, st_shndx, |
1367 | is_ordinary, st_shndx); | |
89fc3421 | 1368 | |
8781f709 | 1369 | if (is_forced_local) |
0602e05a | 1370 | this->force_local(res); |
89fc3421 CC |
1371 | |
1372 | return res; | |
1373 | } | |
1374 | ||
dbe717ef ILT |
1375 | // Add all the symbols in a dynamic object to the hash table. |
1376 | ||
1377 | template<int size, bool big_endian> | |
1378 | void | |
1379 | Symbol_table::add_from_dynobj( | |
1380 | Sized_dynobj<size, big_endian>* dynobj, | |
1381 | const unsigned char* syms, | |
1382 | size_t count, | |
1383 | const char* sym_names, | |
1384 | size_t sym_name_size, | |
1385 | const unsigned char* versym, | |
1386 | size_t versym_size, | |
92de84a6 | 1387 | const std::vector<const char*>* version_map, |
6fa2a40b | 1388 | typename Sized_relobj_file<size, big_endian>::Symbols* sympointers, |
92de84a6 | 1389 | size_t* defined) |
dbe717ef | 1390 | { |
92de84a6 ILT |
1391 | *defined = 0; |
1392 | ||
8851ecca | 1393 | gold_assert(size == parameters->target().get_size()); |
dbe717ef | 1394 | |
88dd47ac ILT |
1395 | if (dynobj->just_symbols()) |
1396 | { | |
1397 | gold_error(_("--just-symbols does not make sense with a shared object")); | |
1398 | return; | |
1399 | } | |
1400 | ||
a7dac153 CC |
1401 | // FIXME: For incremental links, we don't store version information, |
1402 | // so we need to ignore version symbols for now. | |
1403 | if (parameters->incremental_update()) | |
1404 | versym = NULL; | |
1405 | ||
dbe717ef ILT |
1406 | if (versym != NULL && versym_size / 2 < count) |
1407 | { | |
75f2446e ILT |
1408 | dynobj->error(_("too few symbol versions")); |
1409 | return; | |
dbe717ef ILT |
1410 | } |
1411 | ||
1412 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1413 | ||
aeddab66 ILT |
1414 | // We keep a list of all STT_OBJECT symbols, so that we can resolve |
1415 | // weak aliases. This is necessary because if the dynamic object | |
1416 | // provides the same variable under two names, one of which is a | |
1417 | // weak definition, and the regular object refers to the weak | |
1418 | // definition, we have to put both the weak definition and the | |
1419 | // strong definition into the dynamic symbol table. Given a weak | |
1420 | // definition, the only way that we can find the corresponding | |
1421 | // strong definition, if any, is to search the symbol table. | |
1422 | std::vector<Sized_symbol<size>*> object_symbols; | |
1423 | ||
dbe717ef ILT |
1424 | const unsigned char* p = syms; |
1425 | const unsigned char* vs = versym; | |
1426 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) | |
1427 | { | |
1428 | elfcpp::Sym<size, big_endian> sym(p); | |
1429 | ||
92de84a6 ILT |
1430 | if (sympointers != NULL) |
1431 | (*sympointers)[i] = NULL; | |
1432 | ||
65778909 ILT |
1433 | // Ignore symbols with local binding or that have |
1434 | // internal or hidden visibility. | |
1435 | if (sym.get_st_bind() == elfcpp::STB_LOCAL | |
1436 | || sym.get_st_visibility() == elfcpp::STV_INTERNAL | |
1437 | || sym.get_st_visibility() == elfcpp::STV_HIDDEN) | |
dbe717ef ILT |
1438 | continue; |
1439 | ||
8bdcdf2c ILT |
1440 | // A protected symbol in a shared library must be treated as a |
1441 | // normal symbol when viewed from outside the shared library. | |
1442 | // Implement this by overriding the visibility here. | |
1443 | elfcpp::Sym<size, big_endian>* psym = &sym; | |
1444 | unsigned char symbuf[sym_size]; | |
1445 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
1446 | if (sym.get_st_visibility() == elfcpp::STV_PROTECTED) | |
1447 | { | |
1448 | memcpy(symbuf, p, sym_size); | |
1449 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
1450 | sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis()); | |
1451 | psym = &sym2; | |
1452 | } | |
1453 | ||
1454 | unsigned int st_name = psym->get_st_name(); | |
dbe717ef ILT |
1455 | if (st_name >= sym_name_size) |
1456 | { | |
75f2446e ILT |
1457 | dynobj->error(_("bad symbol name offset %u at %zu"), |
1458 | st_name, i); | |
1459 | continue; | |
dbe717ef ILT |
1460 | } |
1461 | ||
2ea97941 | 1462 | const char* name = sym_names + st_name; |
dbe717ef | 1463 | |
d491d34e | 1464 | bool is_ordinary; |
8bdcdf2c | 1465 | unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(), |
d491d34e ILT |
1466 | &is_ordinary); |
1467 | ||
92de84a6 ILT |
1468 | if (st_shndx != elfcpp::SHN_UNDEF) |
1469 | ++*defined; | |
1470 | ||
aeddab66 ILT |
1471 | Sized_symbol<size>* res; |
1472 | ||
dbe717ef ILT |
1473 | if (versym == NULL) |
1474 | { | |
1475 | Stringpool::Key name_key; | |
2ea97941 ILT |
1476 | name = this->namepool_.add(name, true, &name_key); |
1477 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, | |
8bdcdf2c | 1478 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1479 | st_shndx); |
dbe717ef | 1480 | } |
aeddab66 ILT |
1481 | else |
1482 | { | |
1483 | // Read the version information. | |
dbe717ef | 1484 | |
aeddab66 | 1485 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); |
dbe717ef | 1486 | |
aeddab66 ILT |
1487 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; |
1488 | v &= elfcpp::VERSYM_VERSION; | |
dbe717ef | 1489 | |
aeddab66 ILT |
1490 | // The Sun documentation says that V can be VER_NDX_LOCAL, |
1491 | // or VER_NDX_GLOBAL, or a version index. The meaning of | |
1492 | // VER_NDX_LOCAL is defined as "Symbol has local scope." | |
1493 | // The old GNU linker will happily generate VER_NDX_LOCAL | |
1494 | // for an undefined symbol. I don't know what the Sun | |
1495 | // linker will generate. | |
dbe717ef | 1496 | |
aeddab66 | 1497 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
d491d34e | 1498 | && st_shndx != elfcpp::SHN_UNDEF) |
aeddab66 ILT |
1499 | { |
1500 | // This symbol should not be visible outside the object. | |
1501 | continue; | |
1502 | } | |
64707334 | 1503 | |
aeddab66 ILT |
1504 | // At this point we are definitely going to add this symbol. |
1505 | Stringpool::Key name_key; | |
2ea97941 | 1506 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef | 1507 | |
aeddab66 ILT |
1508 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
1509 | || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) | |
1510 | { | |
1511 | // This symbol does not have a version. | |
2ea97941 | 1512 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
8bdcdf2c | 1513 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1514 | st_shndx); |
aeddab66 ILT |
1515 | } |
1516 | else | |
1517 | { | |
1518 | if (v >= version_map->size()) | |
1519 | { | |
1520 | dynobj->error(_("versym for symbol %zu out of range: %u"), | |
1521 | i, v); | |
1522 | continue; | |
1523 | } | |
dbe717ef | 1524 | |
2ea97941 ILT |
1525 | const char* version = (*version_map)[v]; |
1526 | if (version == NULL) | |
aeddab66 ILT |
1527 | { |
1528 | dynobj->error(_("versym for symbol %zu has no name: %u"), | |
1529 | i, v); | |
1530 | continue; | |
1531 | } | |
dbe717ef | 1532 | |
aeddab66 | 1533 | Stringpool::Key version_key; |
2ea97941 | 1534 | version = this->namepool_.add(version, true, &version_key); |
aeddab66 ILT |
1535 | |
1536 | // If this is an absolute symbol, and the version name | |
1537 | // and symbol name are the same, then this is the | |
1538 | // version definition symbol. These symbols exist to | |
1539 | // support using -u to pull in particular versions. We | |
1540 | // do not want to record a version for them. | |
d491d34e ILT |
1541 | if (st_shndx == elfcpp::SHN_ABS |
1542 | && !is_ordinary | |
aeddab66 | 1543 | && name_key == version_key) |
2ea97941 | 1544 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
8bdcdf2c | 1545 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1546 | st_shndx); |
aeddab66 ILT |
1547 | else |
1548 | { | |
8781f709 ILT |
1549 | const bool is_default_version = |
1550 | !hidden && st_shndx != elfcpp::SHN_UNDEF; | |
2ea97941 | 1551 | res = this->add_from_object(dynobj, name, name_key, version, |
8781f709 ILT |
1552 | version_key, is_default_version, |
1553 | *psym, st_shndx, | |
d491d34e | 1554 | is_ordinary, st_shndx); |
aeddab66 ILT |
1555 | } |
1556 | } | |
dbe717ef ILT |
1557 | } |
1558 | ||
99a37bfd | 1559 | // Note that it is possible that RES was overridden by an |
a4bb589a | 1560 | // earlier object, in which case it can't be aliased here. |
d491d34e ILT |
1561 | if (st_shndx != elfcpp::SHN_UNDEF |
1562 | && is_ordinary | |
8bdcdf2c | 1563 | && psym->get_st_type() == elfcpp::STT_OBJECT |
99a37bfd ILT |
1564 | && res->source() == Symbol::FROM_OBJECT |
1565 | && res->object() == dynobj) | |
aeddab66 | 1566 | object_symbols.push_back(res); |
92de84a6 ILT |
1567 | |
1568 | if (sympointers != NULL) | |
1569 | (*sympointers)[i] = res; | |
aeddab66 ILT |
1570 | } |
1571 | ||
1572 | this->record_weak_aliases(&object_symbols); | |
1573 | } | |
1574 | ||
cdc29364 CC |
1575 | // Add a symbol from a incremental object file. |
1576 | ||
1577 | template<int size, bool big_endian> | |
26d3c67d | 1578 | Sized_symbol<size>* |
cdc29364 CC |
1579 | Symbol_table::add_from_incrobj( |
1580 | Object* obj, | |
1581 | const char* name, | |
1582 | const char* ver, | |
1583 | elfcpp::Sym<size, big_endian>* sym) | |
1584 | { | |
1585 | unsigned int st_shndx = sym->get_st_shndx(); | |
1586 | bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE; | |
1587 | ||
1588 | Stringpool::Key ver_key = 0; | |
1589 | bool is_default_version = false; | |
1590 | bool is_forced_local = false; | |
1591 | ||
1592 | Stringpool::Key name_key; | |
1593 | name = this->namepool_.add(name, true, &name_key); | |
1594 | ||
1595 | Sized_symbol<size>* res; | |
1596 | res = this->add_from_object(obj, name, name_key, ver, ver_key, | |
1597 | is_default_version, *sym, st_shndx, | |
1598 | is_ordinary, st_shndx); | |
1599 | ||
1600 | if (is_forced_local) | |
1601 | this->force_local(res); | |
1602 | ||
1603 | return res; | |
1604 | } | |
1605 | ||
aeddab66 ILT |
1606 | // This is used to sort weak aliases. We sort them first by section |
1607 | // index, then by offset, then by weak ahead of strong. | |
1608 | ||
1609 | template<int size> | |
1610 | class Weak_alias_sorter | |
1611 | { | |
1612 | public: | |
1613 | bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const; | |
1614 | }; | |
1615 | ||
1616 | template<int size> | |
1617 | bool | |
1618 | Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1, | |
1619 | const Sized_symbol<size>* s2) const | |
1620 | { | |
d491d34e ILT |
1621 | bool is_ordinary; |
1622 | unsigned int s1_shndx = s1->shndx(&is_ordinary); | |
1623 | gold_assert(is_ordinary); | |
1624 | unsigned int s2_shndx = s2->shndx(&is_ordinary); | |
1625 | gold_assert(is_ordinary); | |
1626 | if (s1_shndx != s2_shndx) | |
1627 | return s1_shndx < s2_shndx; | |
1628 | ||
aeddab66 ILT |
1629 | if (s1->value() != s2->value()) |
1630 | return s1->value() < s2->value(); | |
1631 | if (s1->binding() != s2->binding()) | |
1632 | { | |
1633 | if (s1->binding() == elfcpp::STB_WEAK) | |
1634 | return true; | |
1635 | if (s2->binding() == elfcpp::STB_WEAK) | |
1636 | return false; | |
1637 | } | |
1638 | return std::string(s1->name()) < std::string(s2->name()); | |
1639 | } | |
dbe717ef | 1640 | |
aeddab66 ILT |
1641 | // SYMBOLS is a list of object symbols from a dynamic object. Look |
1642 | // for any weak aliases, and record them so that if we add the weak | |
1643 | // alias to the dynamic symbol table, we also add the corresponding | |
1644 | // strong symbol. | |
dbe717ef | 1645 | |
aeddab66 ILT |
1646 | template<int size> |
1647 | void | |
1648 | Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols) | |
1649 | { | |
1650 | // Sort the vector by section index, then by offset, then by weak | |
1651 | // ahead of strong. | |
1652 | std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>()); | |
1653 | ||
1654 | // Walk through the vector. For each weak definition, record | |
1655 | // aliases. | |
1656 | for (typename std::vector<Sized_symbol<size>*>::const_iterator p = | |
1657 | symbols->begin(); | |
1658 | p != symbols->end(); | |
1659 | ++p) | |
1660 | { | |
1661 | if ((*p)->binding() != elfcpp::STB_WEAK) | |
1662 | continue; | |
1663 | ||
1664 | // Build a circular list of weak aliases. Each symbol points to | |
1665 | // the next one in the circular list. | |
1666 | ||
1667 | Sized_symbol<size>* from_sym = *p; | |
1668 | typename std::vector<Sized_symbol<size>*>::const_iterator q; | |
1669 | for (q = p + 1; q != symbols->end(); ++q) | |
dbe717ef | 1670 | { |
d491d34e ILT |
1671 | bool dummy; |
1672 | if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy) | |
aeddab66 ILT |
1673 | || (*q)->value() != from_sym->value()) |
1674 | break; | |
1675 | ||
1676 | this->weak_aliases_[from_sym] = *q; | |
1677 | from_sym->set_has_alias(); | |
1678 | from_sym = *q; | |
dbe717ef ILT |
1679 | } |
1680 | ||
aeddab66 ILT |
1681 | if (from_sym != *p) |
1682 | { | |
1683 | this->weak_aliases_[from_sym] = *p; | |
1684 | from_sym->set_has_alias(); | |
1685 | } | |
dbe717ef | 1686 | |
aeddab66 | 1687 | p = q - 1; |
dbe717ef ILT |
1688 | } |
1689 | } | |
1690 | ||
ead1e424 ILT |
1691 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
1692 | // true, then only create the symbol if there is a reference to it. | |
86f2e683 | 1693 | // If this does not return NULL, it sets *POLDSYM to the existing |
8c500701 ILT |
1694 | // symbol if there is one. This sets *RESOLVE_OLDSYM if we should |
1695 | // resolve the newly created symbol to the old one. This | |
1696 | // canonicalizes *PNAME and *PVERSION. | |
ead1e424 ILT |
1697 | |
1698 | template<int size, bool big_endian> | |
1699 | Sized_symbol<size>* | |
9b07f471 ILT |
1700 | Symbol_table::define_special_symbol(const char** pname, const char** pversion, |
1701 | bool only_if_ref, | |
8c500701 | 1702 | Sized_symbol<size>** poldsym, |
ca09d69a | 1703 | bool* resolve_oldsym) |
ead1e424 | 1704 | { |
8c500701 | 1705 | *resolve_oldsym = false; |
8cc69fb6 | 1706 | *poldsym = NULL; |
ead1e424 | 1707 | |
55a93433 ILT |
1708 | // If the caller didn't give us a version, see if we get one from |
1709 | // the version script. | |
057ead22 | 1710 | std::string v; |
8c500701 | 1711 | bool is_default_version = false; |
55a93433 ILT |
1712 | if (*pversion == NULL) |
1713 | { | |
98e090bd ILT |
1714 | bool is_global; |
1715 | if (this->version_script_.get_symbol_version(*pname, &v, &is_global)) | |
057ead22 | 1716 | { |
98e090bd ILT |
1717 | if (is_global && !v.empty()) |
1718 | { | |
1719 | *pversion = v.c_str(); | |
1720 | // If we get the version from a version script, then we | |
1721 | // are also the default version. | |
1722 | is_default_version = true; | |
1723 | } | |
057ead22 | 1724 | } |
55a93433 ILT |
1725 | } |
1726 | ||
8c500701 ILT |
1727 | Symbol* oldsym; |
1728 | Sized_symbol<size>* sym; | |
1729 | ||
1730 | bool add_to_table = false; | |
1731 | typename Symbol_table_type::iterator add_loc = this->table_.end(); | |
1732 | bool add_def_to_table = false; | |
1733 | typename Symbol_table_type::iterator add_def_loc = this->table_.end(); | |
1734 | ||
ead1e424 ILT |
1735 | if (only_if_ref) |
1736 | { | |
306d9ef0 | 1737 | oldsym = this->lookup(*pname, *pversion); |
8c500701 ILT |
1738 | if (oldsym == NULL && is_default_version) |
1739 | oldsym = this->lookup(*pname, NULL); | |
f6ce93d6 | 1740 | if (oldsym == NULL || !oldsym->is_undefined()) |
ead1e424 | 1741 | return NULL; |
306d9ef0 ILT |
1742 | |
1743 | *pname = oldsym->name(); | |
eebd87a5 ILT |
1744 | if (is_default_version) |
1745 | *pversion = this->namepool_.add(*pversion, true, NULL); | |
1746 | else | |
8c500701 | 1747 | *pversion = oldsym->version(); |
ead1e424 ILT |
1748 | } |
1749 | else | |
1750 | { | |
14b31740 | 1751 | // Canonicalize NAME and VERSION. |
f0641a0b | 1752 | Stringpool::Key name_key; |
cfd73a4e | 1753 | *pname = this->namepool_.add(*pname, true, &name_key); |
ead1e424 | 1754 | |
14b31740 | 1755 | Stringpool::Key version_key = 0; |
306d9ef0 | 1756 | if (*pversion != NULL) |
cfd73a4e | 1757 | *pversion = this->namepool_.add(*pversion, true, &version_key); |
14b31740 | 1758 | |
ead1e424 | 1759 | Symbol* const snull = NULL; |
ead1e424 | 1760 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
14b31740 ILT |
1761 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
1762 | version_key), | |
ead1e424 ILT |
1763 | snull)); |
1764 | ||
8781f709 | 1765 | std::pair<typename Symbol_table_type::iterator, bool> insdefault = |
8c500701 ILT |
1766 | std::make_pair(this->table_.end(), false); |
1767 | if (is_default_version) | |
1768 | { | |
1769 | const Stringpool::Key vnull = 0; | |
8781f709 ILT |
1770 | insdefault = |
1771 | this->table_.insert(std::make_pair(std::make_pair(name_key, | |
1772 | vnull), | |
1773 | snull)); | |
8c500701 ILT |
1774 | } |
1775 | ||
ead1e424 ILT |
1776 | if (!ins.second) |
1777 | { | |
14b31740 | 1778 | // We already have a symbol table entry for NAME/VERSION. |
ead1e424 | 1779 | oldsym = ins.first->second; |
a3ad94ed | 1780 | gold_assert(oldsym != NULL); |
8c500701 ILT |
1781 | |
1782 | if (is_default_version) | |
1783 | { | |
1784 | Sized_symbol<size>* soldsym = | |
1785 | this->get_sized_symbol<size>(oldsym); | |
1786 | this->define_default_version<size, big_endian>(soldsym, | |
8781f709 ILT |
1787 | insdefault.second, |
1788 | insdefault.first); | |
8c500701 | 1789 | } |
ead1e424 ILT |
1790 | } |
1791 | else | |
1792 | { | |
1793 | // We haven't seen this symbol before. | |
a3ad94ed | 1794 | gold_assert(ins.first->second == NULL); |
8c500701 ILT |
1795 | |
1796 | add_to_table = true; | |
1797 | add_loc = ins.first; | |
1798 | ||
8781f709 | 1799 | if (is_default_version && !insdefault.second) |
8c500701 ILT |
1800 | { |
1801 | // We are adding NAME/VERSION, and it is the default | |
1802 | // version. We already have an entry for NAME/NULL. | |
8781f709 | 1803 | oldsym = insdefault.first->second; |
8c500701 ILT |
1804 | *resolve_oldsym = true; |
1805 | } | |
1806 | else | |
1807 | { | |
1808 | oldsym = NULL; | |
1809 | ||
1810 | if (is_default_version) | |
1811 | { | |
1812 | add_def_to_table = true; | |
8781f709 | 1813 | add_def_loc = insdefault.first; |
8c500701 ILT |
1814 | } |
1815 | } | |
ead1e424 ILT |
1816 | } |
1817 | } | |
1818 | ||
8851ecca ILT |
1819 | const Target& target = parameters->target(); |
1820 | if (!target.has_make_symbol()) | |
86f2e683 ILT |
1821 | sym = new Sized_symbol<size>(); |
1822 | else | |
ead1e424 | 1823 | { |
029ba973 ILT |
1824 | Sized_target<size, big_endian>* sized_target = |
1825 | parameters->sized_target<size, big_endian>(); | |
86f2e683 ILT |
1826 | sym = sized_target->make_symbol(); |
1827 | if (sym == NULL) | |
1828 | return NULL; | |
1829 | } | |
ead1e424 | 1830 | |
86f2e683 ILT |
1831 | if (add_to_table) |
1832 | add_loc->second = sym; | |
1833 | else | |
1834 | gold_assert(oldsym != NULL); | |
ead1e424 | 1835 | |
8c500701 ILT |
1836 | if (add_def_to_table) |
1837 | add_def_loc->second = sym; | |
1838 | ||
7d1a9ebb | 1839 | *poldsym = this->get_sized_symbol<size>(oldsym); |
ead1e424 ILT |
1840 | |
1841 | return sym; | |
1842 | } | |
1843 | ||
1844 | // Define a symbol based on an Output_data. | |
1845 | ||
14b31740 | 1846 | Symbol* |
2ea97941 ILT |
1847 | Symbol_table::define_in_output_data(const char* name, |
1848 | const char* version, | |
99fff23b | 1849 | Defined defined, |
9b07f471 | 1850 | Output_data* od, |
2ea97941 ILT |
1851 | uint64_t value, |
1852 | uint64_t symsize, | |
9b07f471 ILT |
1853 | elfcpp::STT type, |
1854 | elfcpp::STB binding, | |
ead1e424 ILT |
1855 | elfcpp::STV visibility, |
1856 | unsigned char nonvis, | |
2ea97941 | 1857 | bool offset_is_from_end, |
ead1e424 ILT |
1858 | bool only_if_ref) |
1859 | { | |
8851ecca | 1860 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
1861 | { |
1862 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 1863 | return this->do_define_in_output_data<32>(name, version, defined, od, |
2ea97941 | 1864 | value, symsize, type, binding, |
86f2e683 | 1865 | visibility, nonvis, |
2ea97941 | 1866 | offset_is_from_end, |
86f2e683 ILT |
1867 | only_if_ref); |
1868 | #else | |
1869 | gold_unreachable(); | |
1870 | #endif | |
1871 | } | |
8851ecca | 1872 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
1873 | { |
1874 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 1875 | return this->do_define_in_output_data<64>(name, version, defined, od, |
2ea97941 | 1876 | value, symsize, type, binding, |
86f2e683 | 1877 | visibility, nonvis, |
2ea97941 | 1878 | offset_is_from_end, |
86f2e683 ILT |
1879 | only_if_ref); |
1880 | #else | |
1881 | gold_unreachable(); | |
1882 | #endif | |
1883 | } | |
ead1e424 | 1884 | else |
a3ad94ed | 1885 | gold_unreachable(); |
ead1e424 ILT |
1886 | } |
1887 | ||
1888 | // Define a symbol in an Output_data, sized version. | |
1889 | ||
1890 | template<int size> | |
14b31740 | 1891 | Sized_symbol<size>* |
ead1e424 | 1892 | Symbol_table::do_define_in_output_data( |
2ea97941 ILT |
1893 | const char* name, |
1894 | const char* version, | |
99fff23b | 1895 | Defined defined, |
ead1e424 | 1896 | Output_data* od, |
2ea97941 ILT |
1897 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
1898 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
1899 | elfcpp::STT type, |
1900 | elfcpp::STB binding, | |
1901 | elfcpp::STV visibility, | |
1902 | unsigned char nonvis, | |
2ea97941 | 1903 | bool offset_is_from_end, |
ead1e424 ILT |
1904 | bool only_if_ref) |
1905 | { | |
1906 | Sized_symbol<size>* sym; | |
86f2e683 | 1907 | Sized_symbol<size>* oldsym; |
8c500701 | 1908 | bool resolve_oldsym; |
ead1e424 | 1909 | |
8851ecca | 1910 | if (parameters->target().is_big_endian()) |
193a53d9 ILT |
1911 | { |
1912 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 1913 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
1914 | only_if_ref, &oldsym, |
1915 | &resolve_oldsym); | |
193a53d9 ILT |
1916 | #else |
1917 | gold_unreachable(); | |
1918 | #endif | |
1919 | } | |
ead1e424 | 1920 | else |
193a53d9 ILT |
1921 | { |
1922 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 1923 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
1924 | only_if_ref, &oldsym, |
1925 | &resolve_oldsym); | |
193a53d9 ILT |
1926 | #else |
1927 | gold_unreachable(); | |
1928 | #endif | |
1929 | } | |
ead1e424 ILT |
1930 | |
1931 | if (sym == NULL) | |
14b31740 | 1932 | return NULL; |
ead1e424 | 1933 | |
2ea97941 | 1934 | sym->init_output_data(name, version, od, value, symsize, type, binding, |
5146f448 CC |
1935 | visibility, nonvis, offset_is_from_end, |
1936 | defined == PREDEFINED); | |
14b31740 | 1937 | |
e5756efb | 1938 | if (oldsym == NULL) |
55a93433 ILT |
1939 | { |
1940 | if (binding == elfcpp::STB_LOCAL | |
2ea97941 | 1941 | || this->version_script_.symbol_is_local(name)) |
55a93433 | 1942 | this->force_local(sym); |
2ea97941 | 1943 | else if (version != NULL) |
75517b77 | 1944 | sym->set_is_default(); |
55a93433 ILT |
1945 | return sym; |
1946 | } | |
86f2e683 | 1947 | |
62855347 | 1948 | if (Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 1949 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
1950 | |
1951 | if (resolve_oldsym) | |
1952 | return sym; | |
1953 | else | |
1954 | { | |
1955 | delete sym; | |
1956 | return oldsym; | |
1957 | } | |
ead1e424 ILT |
1958 | } |
1959 | ||
1960 | // Define a symbol based on an Output_segment. | |
1961 | ||
14b31740 | 1962 | Symbol* |
2ea97941 | 1963 | Symbol_table::define_in_output_segment(const char* name, |
99fff23b ILT |
1964 | const char* version, |
1965 | Defined defined, | |
1966 | Output_segment* os, | |
2ea97941 ILT |
1967 | uint64_t value, |
1968 | uint64_t symsize, | |
9b07f471 ILT |
1969 | elfcpp::STT type, |
1970 | elfcpp::STB binding, | |
ead1e424 ILT |
1971 | elfcpp::STV visibility, |
1972 | unsigned char nonvis, | |
2ea97941 | 1973 | Symbol::Segment_offset_base offset_base, |
ead1e424 ILT |
1974 | bool only_if_ref) |
1975 | { | |
8851ecca | 1976 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
1977 | { |
1978 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 1979 | return this->do_define_in_output_segment<32>(name, version, defined, os, |
2ea97941 | 1980 | value, symsize, type, |
86f2e683 | 1981 | binding, visibility, nonvis, |
2ea97941 | 1982 | offset_base, only_if_ref); |
86f2e683 ILT |
1983 | #else |
1984 | gold_unreachable(); | |
1985 | #endif | |
1986 | } | |
8851ecca | 1987 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
1988 | { |
1989 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 1990 | return this->do_define_in_output_segment<64>(name, version, defined, os, |
2ea97941 | 1991 | value, symsize, type, |
86f2e683 | 1992 | binding, visibility, nonvis, |
2ea97941 | 1993 | offset_base, only_if_ref); |
86f2e683 ILT |
1994 | #else |
1995 | gold_unreachable(); | |
1996 | #endif | |
1997 | } | |
ead1e424 | 1998 | else |
a3ad94ed | 1999 | gold_unreachable(); |
ead1e424 ILT |
2000 | } |
2001 | ||
2002 | // Define a symbol in an Output_segment, sized version. | |
2003 | ||
2004 | template<int size> | |
14b31740 | 2005 | Sized_symbol<size>* |
ead1e424 | 2006 | Symbol_table::do_define_in_output_segment( |
2ea97941 ILT |
2007 | const char* name, |
2008 | const char* version, | |
99fff23b | 2009 | Defined defined, |
ead1e424 | 2010 | Output_segment* os, |
2ea97941 ILT |
2011 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2012 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
2013 | elfcpp::STT type, |
2014 | elfcpp::STB binding, | |
2015 | elfcpp::STV visibility, | |
2016 | unsigned char nonvis, | |
2ea97941 | 2017 | Symbol::Segment_offset_base offset_base, |
ead1e424 ILT |
2018 | bool only_if_ref) |
2019 | { | |
2020 | Sized_symbol<size>* sym; | |
86f2e683 | 2021 | Sized_symbol<size>* oldsym; |
8c500701 | 2022 | bool resolve_oldsym; |
ead1e424 | 2023 | |
8851ecca | 2024 | if (parameters->target().is_big_endian()) |
9025d29d ILT |
2025 | { |
2026 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 2027 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
2028 | only_if_ref, &oldsym, |
2029 | &resolve_oldsym); | |
9025d29d ILT |
2030 | #else |
2031 | gold_unreachable(); | |
2032 | #endif | |
2033 | } | |
ead1e424 | 2034 | else |
9025d29d ILT |
2035 | { |
2036 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 2037 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
2038 | only_if_ref, &oldsym, |
2039 | &resolve_oldsym); | |
9025d29d ILT |
2040 | #else |
2041 | gold_unreachable(); | |
2042 | #endif | |
2043 | } | |
ead1e424 ILT |
2044 | |
2045 | if (sym == NULL) | |
14b31740 | 2046 | return NULL; |
ead1e424 | 2047 | |
2ea97941 | 2048 | sym->init_output_segment(name, version, os, value, symsize, type, binding, |
5146f448 CC |
2049 | visibility, nonvis, offset_base, |
2050 | defined == PREDEFINED); | |
14b31740 | 2051 | |
e5756efb | 2052 | if (oldsym == NULL) |
55a93433 ILT |
2053 | { |
2054 | if (binding == elfcpp::STB_LOCAL | |
2ea97941 | 2055 | || this->version_script_.symbol_is_local(name)) |
55a93433 | 2056 | this->force_local(sym); |
2ea97941 | 2057 | else if (version != NULL) |
75517b77 | 2058 | sym->set_is_default(); |
55a93433 ILT |
2059 | return sym; |
2060 | } | |
86f2e683 | 2061 | |
62855347 | 2062 | if (Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 2063 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2064 | |
2065 | if (resolve_oldsym) | |
2066 | return sym; | |
2067 | else | |
2068 | { | |
2069 | delete sym; | |
2070 | return oldsym; | |
2071 | } | |
ead1e424 ILT |
2072 | } |
2073 | ||
2074 | // Define a special symbol with a constant value. It is a multiple | |
2075 | // definition error if this symbol is already defined. | |
2076 | ||
14b31740 | 2077 | Symbol* |
2ea97941 ILT |
2078 | Symbol_table::define_as_constant(const char* name, |
2079 | const char* version, | |
99fff23b | 2080 | Defined defined, |
2ea97941 ILT |
2081 | uint64_t value, |
2082 | uint64_t symsize, | |
9b07f471 ILT |
2083 | elfcpp::STT type, |
2084 | elfcpp::STB binding, | |
2085 | elfcpp::STV visibility, | |
2086 | unsigned char nonvis, | |
caa9d5d9 ILT |
2087 | bool only_if_ref, |
2088 | bool force_override) | |
ead1e424 | 2089 | { |
8851ecca | 2090 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
2091 | { |
2092 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 2093 | return this->do_define_as_constant<32>(name, version, defined, value, |
2ea97941 | 2094 | symsize, type, binding, |
caa9d5d9 ILT |
2095 | visibility, nonvis, only_if_ref, |
2096 | force_override); | |
86f2e683 ILT |
2097 | #else |
2098 | gold_unreachable(); | |
2099 | #endif | |
2100 | } | |
8851ecca | 2101 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
2102 | { |
2103 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 2104 | return this->do_define_as_constant<64>(name, version, defined, value, |
2ea97941 | 2105 | symsize, type, binding, |
caa9d5d9 ILT |
2106 | visibility, nonvis, only_if_ref, |
2107 | force_override); | |
86f2e683 ILT |
2108 | #else |
2109 | gold_unreachable(); | |
2110 | #endif | |
2111 | } | |
ead1e424 | 2112 | else |
a3ad94ed | 2113 | gold_unreachable(); |
ead1e424 ILT |
2114 | } |
2115 | ||
2116 | // Define a symbol as a constant, sized version. | |
2117 | ||
2118 | template<int size> | |
14b31740 | 2119 | Sized_symbol<size>* |
ead1e424 | 2120 | Symbol_table::do_define_as_constant( |
2ea97941 ILT |
2121 | const char* name, |
2122 | const char* version, | |
99fff23b | 2123 | Defined defined, |
2ea97941 ILT |
2124 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2125 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
2126 | elfcpp::STT type, |
2127 | elfcpp::STB binding, | |
2128 | elfcpp::STV visibility, | |
2129 | unsigned char nonvis, | |
caa9d5d9 ILT |
2130 | bool only_if_ref, |
2131 | bool force_override) | |
ead1e424 ILT |
2132 | { |
2133 | Sized_symbol<size>* sym; | |
86f2e683 | 2134 | Sized_symbol<size>* oldsym; |
8c500701 | 2135 | bool resolve_oldsym; |
ead1e424 | 2136 | |
8851ecca | 2137 | if (parameters->target().is_big_endian()) |
9025d29d ILT |
2138 | { |
2139 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 2140 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
2141 | only_if_ref, &oldsym, |
2142 | &resolve_oldsym); | |
9025d29d ILT |
2143 | #else |
2144 | gold_unreachable(); | |
2145 | #endif | |
2146 | } | |
ead1e424 | 2147 | else |
9025d29d ILT |
2148 | { |
2149 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 2150 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
2151 | only_if_ref, &oldsym, |
2152 | &resolve_oldsym); | |
9025d29d ILT |
2153 | #else |
2154 | gold_unreachable(); | |
2155 | #endif | |
2156 | } | |
ead1e424 ILT |
2157 | |
2158 | if (sym == NULL) | |
14b31740 | 2159 | return NULL; |
ead1e424 | 2160 | |
2ea97941 | 2161 | sym->init_constant(name, version, value, symsize, type, binding, visibility, |
5146f448 | 2162 | nonvis, defined == PREDEFINED); |
14b31740 | 2163 | |
e5756efb | 2164 | if (oldsym == NULL) |
55a93433 | 2165 | { |
686c8caf ILT |
2166 | // Version symbols are absolute symbols with name == version. |
2167 | // We don't want to force them to be local. | |
2ea97941 ILT |
2168 | if ((version == NULL |
2169 | || name != version | |
2170 | || value != 0) | |
686c8caf | 2171 | && (binding == elfcpp::STB_LOCAL |
2ea97941 | 2172 | || this->version_script_.symbol_is_local(name))) |
55a93433 | 2173 | this->force_local(sym); |
2ea97941 ILT |
2174 | else if (version != NULL |
2175 | && (name != version || value != 0)) | |
75517b77 | 2176 | sym->set_is_default(); |
55a93433 ILT |
2177 | return sym; |
2178 | } | |
86f2e683 | 2179 | |
99fff23b | 2180 | if (force_override |
62855347 | 2181 | || Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 2182 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2183 | |
2184 | if (resolve_oldsym) | |
2185 | return sym; | |
2186 | else | |
2187 | { | |
2188 | delete sym; | |
2189 | return oldsym; | |
2190 | } | |
ead1e424 ILT |
2191 | } |
2192 | ||
2193 | // Define a set of symbols in output sections. | |
2194 | ||
2195 | void | |
9b07f471 | 2196 | Symbol_table::define_symbols(const Layout* layout, int count, |
a445fddf ILT |
2197 | const Define_symbol_in_section* p, |
2198 | bool only_if_ref) | |
ead1e424 ILT |
2199 | { |
2200 | for (int i = 0; i < count; ++i, ++p) | |
2201 | { | |
2202 | Output_section* os = layout->find_output_section(p->output_section); | |
2203 | if (os != NULL) | |
99fff23b | 2204 | this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value, |
14b31740 ILT |
2205 | p->size, p->type, p->binding, |
2206 | p->visibility, p->nonvis, | |
a445fddf ILT |
2207 | p->offset_is_from_end, |
2208 | only_if_ref || p->only_if_ref); | |
ead1e424 | 2209 | else |
99fff23b ILT |
2210 | this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size, |
2211 | p->type, p->binding, p->visibility, p->nonvis, | |
caa9d5d9 ILT |
2212 | only_if_ref || p->only_if_ref, |
2213 | false); | |
ead1e424 ILT |
2214 | } |
2215 | } | |
2216 | ||
2217 | // Define a set of symbols in output segments. | |
2218 | ||
2219 | void | |
9b07f471 | 2220 | Symbol_table::define_symbols(const Layout* layout, int count, |
a445fddf ILT |
2221 | const Define_symbol_in_segment* p, |
2222 | bool only_if_ref) | |
ead1e424 ILT |
2223 | { |
2224 | for (int i = 0; i < count; ++i, ++p) | |
2225 | { | |
2226 | Output_segment* os = layout->find_output_segment(p->segment_type, | |
2227 | p->segment_flags_set, | |
2228 | p->segment_flags_clear); | |
2229 | if (os != NULL) | |
99fff23b | 2230 | this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value, |
14b31740 ILT |
2231 | p->size, p->type, p->binding, |
2232 | p->visibility, p->nonvis, | |
a445fddf ILT |
2233 | p->offset_base, |
2234 | only_if_ref || p->only_if_ref); | |
ead1e424 | 2235 | else |
99fff23b ILT |
2236 | this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size, |
2237 | p->type, p->binding, p->visibility, p->nonvis, | |
caa9d5d9 ILT |
2238 | only_if_ref || p->only_if_ref, |
2239 | false); | |
ead1e424 ILT |
2240 | } |
2241 | } | |
2242 | ||
46fe1623 ILT |
2243 | // Define CSYM using a COPY reloc. POSD is the Output_data where the |
2244 | // symbol should be defined--typically a .dyn.bss section. VALUE is | |
2245 | // the offset within POSD. | |
2246 | ||
2247 | template<int size> | |
2248 | void | |
fe8718a4 | 2249 | Symbol_table::define_with_copy_reloc( |
fe8718a4 ILT |
2250 | Sized_symbol<size>* csym, |
2251 | Output_data* posd, | |
2ea97941 | 2252 | typename elfcpp::Elf_types<size>::Elf_Addr value) |
46fe1623 ILT |
2253 | { |
2254 | gold_assert(csym->is_from_dynobj()); | |
2255 | gold_assert(!csym->is_copied_from_dynobj()); | |
2ea97941 ILT |
2256 | Object* object = csym->object(); |
2257 | gold_assert(object->is_dynamic()); | |
2258 | Dynobj* dynobj = static_cast<Dynobj*>(object); | |
46fe1623 ILT |
2259 | |
2260 | // Our copied variable has to override any variable in a shared | |
2261 | // library. | |
2262 | elfcpp::STB binding = csym->binding(); | |
2263 | if (binding == elfcpp::STB_WEAK) | |
2264 | binding = elfcpp::STB_GLOBAL; | |
2265 | ||
99fff23b | 2266 | this->define_in_output_data(csym->name(), csym->version(), COPY, |
2ea97941 | 2267 | posd, value, csym->symsize(), |
46fe1623 ILT |
2268 | csym->type(), binding, |
2269 | csym->visibility(), csym->nonvis(), | |
2270 | false, false); | |
2271 | ||
2272 | csym->set_is_copied_from_dynobj(); | |
2273 | csym->set_needs_dynsym_entry(); | |
2274 | ||
2275 | this->copied_symbol_dynobjs_[csym] = dynobj; | |
2276 | ||
2277 | // We have now defined all aliases, but we have not entered them all | |
2278 | // in the copied_symbol_dynobjs_ map. | |
2279 | if (csym->has_alias()) | |
2280 | { | |
2281 | Symbol* sym = csym; | |
2282 | while (true) | |
2283 | { | |
2284 | sym = this->weak_aliases_[sym]; | |
2285 | if (sym == csym) | |
2286 | break; | |
2287 | gold_assert(sym->output_data() == posd); | |
2288 | ||
2289 | sym->set_is_copied_from_dynobj(); | |
2290 | this->copied_symbol_dynobjs_[sym] = dynobj; | |
2291 | } | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | // SYM is defined using a COPY reloc. Return the dynamic object where | |
2296 | // the original definition was found. | |
2297 | ||
2298 | Dynobj* | |
2299 | Symbol_table::get_copy_source(const Symbol* sym) const | |
2300 | { | |
2301 | gold_assert(sym->is_copied_from_dynobj()); | |
2302 | Copied_symbol_dynobjs::const_iterator p = | |
2303 | this->copied_symbol_dynobjs_.find(sym); | |
2304 | gold_assert(p != this->copied_symbol_dynobjs_.end()); | |
2305 | return p->second; | |
2306 | } | |
2307 | ||
f3e9c5c5 ILT |
2308 | // Add any undefined symbols named on the command line. |
2309 | ||
2310 | void | |
88a4108b | 2311 | Symbol_table::add_undefined_symbols_from_command_line(Layout* layout) |
f3e9c5c5 | 2312 | { |
88a4108b ILT |
2313 | if (parameters->options().any_undefined() |
2314 | || layout->script_options()->any_unreferenced()) | |
f3e9c5c5 ILT |
2315 | { |
2316 | if (parameters->target().get_size() == 32) | |
2317 | { | |
5adf9721 | 2318 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
88a4108b | 2319 | this->do_add_undefined_symbols_from_command_line<32>(layout); |
f3e9c5c5 ILT |
2320 | #else |
2321 | gold_unreachable(); | |
2322 | #endif | |
2323 | } | |
2324 | else if (parameters->target().get_size() == 64) | |
2325 | { | |
2326 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
88a4108b | 2327 | this->do_add_undefined_symbols_from_command_line<64>(layout); |
f3e9c5c5 ILT |
2328 | #else |
2329 | gold_unreachable(); | |
2330 | #endif | |
2331 | } | |
2332 | else | |
2333 | gold_unreachable(); | |
2334 | } | |
2335 | } | |
2336 | ||
2337 | template<int size> | |
2338 | void | |
88a4108b | 2339 | Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout) |
f3e9c5c5 ILT |
2340 | { |
2341 | for (options::String_set::const_iterator p = | |
2342 | parameters->options().undefined_begin(); | |
2343 | p != parameters->options().undefined_end(); | |
2344 | ++p) | |
88a4108b | 2345 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); |
f3e9c5c5 | 2346 | |
31821be0 CC |
2347 | for (options::String_set::const_iterator p = |
2348 | parameters->options().export_dynamic_symbol_begin(); | |
2349 | p != parameters->options().export_dynamic_symbol_end(); | |
2350 | ++p) | |
2351 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); | |
2352 | ||
88a4108b ILT |
2353 | for (Script_options::referenced_const_iterator p = |
2354 | layout->script_options()->referenced_begin(); | |
2355 | p != layout->script_options()->referenced_end(); | |
2356 | ++p) | |
2357 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); | |
2358 | } | |
2359 | ||
2360 | template<int size> | |
2361 | void | |
2362 | Symbol_table::add_undefined_symbol_from_command_line(const char* name) | |
2363 | { | |
2364 | if (this->lookup(name) != NULL) | |
2365 | return; | |
f3e9c5c5 | 2366 | |
88a4108b | 2367 | const char* version = NULL; |
f3e9c5c5 | 2368 | |
88a4108b ILT |
2369 | Sized_symbol<size>* sym; |
2370 | Sized_symbol<size>* oldsym; | |
2371 | bool resolve_oldsym; | |
2372 | if (parameters->target().is_big_endian()) | |
2373 | { | |
f3e9c5c5 | 2374 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) |
88a4108b ILT |
2375 | sym = this->define_special_symbol<size, true>(&name, &version, |
2376 | false, &oldsym, | |
2377 | &resolve_oldsym); | |
f3e9c5c5 | 2378 | #else |
88a4108b | 2379 | gold_unreachable(); |
f3e9c5c5 | 2380 | #endif |
88a4108b ILT |
2381 | } |
2382 | else | |
2383 | { | |
f3e9c5c5 | 2384 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) |
88a4108b ILT |
2385 | sym = this->define_special_symbol<size, false>(&name, &version, |
2386 | false, &oldsym, | |
2387 | &resolve_oldsym); | |
f3e9c5c5 | 2388 | #else |
88a4108b | 2389 | gold_unreachable(); |
f3e9c5c5 | 2390 | #endif |
88a4108b | 2391 | } |
f3e9c5c5 | 2392 | |
88a4108b | 2393 | gold_assert(oldsym == NULL); |
f3e9c5c5 | 2394 | |
88a4108b ILT |
2395 | sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
2396 | elfcpp::STV_DEFAULT, 0); | |
2397 | ++this->saw_undefined_; | |
f3e9c5c5 ILT |
2398 | } |
2399 | ||
a3ad94ed ILT |
2400 | // Set the dynamic symbol indexes. INDEX is the index of the first |
2401 | // global dynamic symbol. Pointers to the symbols are stored into the | |
2402 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
2403 | // updated dynamic symbol index. | |
2404 | ||
2405 | unsigned int | |
9b07f471 | 2406 | Symbol_table::set_dynsym_indexes(unsigned int index, |
a3ad94ed | 2407 | std::vector<Symbol*>* syms, |
14b31740 ILT |
2408 | Stringpool* dynpool, |
2409 | Versions* versions) | |
a3ad94ed | 2410 | { |
32e2b61d AM |
2411 | std::vector<Symbol*> as_needed_sym; |
2412 | ||
98ff9231 CC |
2413 | // Allow a target to set dynsym indexes. |
2414 | if (parameters->target().has_custom_set_dynsym_indexes()) | |
2415 | { | |
2416 | std::vector<Symbol*> dyn_symbols; | |
2417 | for (Symbol_table_type::iterator p = this->table_.begin(); | |
2418 | p != this->table_.end(); | |
2419 | ++p) | |
2420 | { | |
2421 | Symbol* sym = p->second; | |
2422 | if (!sym->should_add_dynsym_entry(this)) | |
2423 | sym->set_dynsym_index(-1U); | |
2424 | else | |
2425 | dyn_symbols.push_back(sym); | |
2426 | } | |
2427 | ||
2428 | return parameters->target().set_dynsym_indexes(&dyn_symbols, index, syms, | |
2429 | dynpool, versions, this); | |
2430 | } | |
2431 | ||
a3ad94ed ILT |
2432 | for (Symbol_table_type::iterator p = this->table_.begin(); |
2433 | p != this->table_.end(); | |
2434 | ++p) | |
2435 | { | |
2436 | Symbol* sym = p->second; | |
16649710 ILT |
2437 | |
2438 | // Note that SYM may already have a dynamic symbol index, since | |
2439 | // some symbols appear more than once in the symbol table, with | |
2440 | // and without a version. | |
2441 | ||
ce97fa81 | 2442 | if (!sym->should_add_dynsym_entry(this)) |
16649710 ILT |
2443 | sym->set_dynsym_index(-1U); |
2444 | else if (!sym->has_dynsym_index()) | |
a3ad94ed ILT |
2445 | { |
2446 | sym->set_dynsym_index(index); | |
2447 | ++index; | |
2448 | syms->push_back(sym); | |
cfd73a4e | 2449 | dynpool->add(sym->name(), false, NULL); |
14b31740 | 2450 | |
594c8e5e | 2451 | // If the symbol is defined in a dynamic object and is |
32e2b61d AM |
2452 | // referenced strongly in a regular object, then mark the |
2453 | // dynamic object as needed. This is used to implement | |
2454 | // --as-needed. | |
2455 | if (sym->is_from_dynobj() | |
2456 | && sym->in_reg() | |
2457 | && !sym->is_undef_binding_weak()) | |
594c8e5e | 2458 | sym->object()->set_is_needed(); |
32e2b61d AM |
2459 | |
2460 | // Record any version information, except those from | |
2461 | // as-needed libraries not seen to be needed. Note that the | |
2462 | // is_needed state for such libraries can change in this loop. | |
2463 | if (sym->version() != NULL) | |
2464 | { | |
2465 | if (!sym->is_from_dynobj() | |
2466 | || !sym->object()->as_needed() | |
2467 | || sym->object()->is_needed()) | |
2468 | versions->record_version(this, dynpool, sym); | |
2469 | else | |
2470 | as_needed_sym.push_back(sym); | |
2471 | } | |
a3ad94ed ILT |
2472 | } |
2473 | } | |
2474 | ||
32e2b61d AM |
2475 | // Process version information for symbols from as-needed libraries. |
2476 | for (std::vector<Symbol*>::iterator p = as_needed_sym.begin(); | |
2477 | p != as_needed_sym.end(); | |
2478 | ++p) | |
2479 | { | |
2480 | Symbol* sym = *p; | |
2481 | ||
2482 | if (sym->object()->is_needed()) | |
2483 | versions->record_version(this, dynpool, sym); | |
2484 | else | |
2485 | sym->clear_version(); | |
2486 | } | |
2487 | ||
14b31740 ILT |
2488 | // Finish up the versions. In some cases this may add new dynamic |
2489 | // symbols. | |
9b07f471 | 2490 | index = versions->finalize(this, index, syms); |
14b31740 | 2491 | |
a3ad94ed ILT |
2492 | return index; |
2493 | } | |
2494 | ||
c06b7b0b | 2495 | // Set the final values for all the symbols. The index of the first |
55a93433 ILT |
2496 | // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the |
2497 | // file offset OFF. Add their names to POOL. Return the new file | |
2498 | // offset. Update *PLOCAL_SYMCOUNT if necessary. | |
54dc6425 | 2499 | |
75f65a3e | 2500 | off_t |
55a93433 ILT |
2501 | Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index, |
2502 | size_t dyncount, Stringpool* pool, | |
ca09d69a | 2503 | unsigned int* plocal_symcount) |
54dc6425 | 2504 | { |
f6ce93d6 ILT |
2505 | off_t ret; |
2506 | ||
55a93433 ILT |
2507 | gold_assert(*plocal_symcount != 0); |
2508 | this->first_global_index_ = *plocal_symcount; | |
c06b7b0b | 2509 | |
16649710 ILT |
2510 | this->dynamic_offset_ = dynoff; |
2511 | this->first_dynamic_global_index_ = dyn_global_index; | |
2512 | this->dynamic_count_ = dyncount; | |
2513 | ||
8851ecca | 2514 | if (parameters->target().get_size() == 32) |
9025d29d ILT |
2515 | { |
2516 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE) | |
55a93433 | 2517 | ret = this->sized_finalize<32>(off, pool, plocal_symcount); |
9025d29d ILT |
2518 | #else |
2519 | gold_unreachable(); | |
2520 | #endif | |
2521 | } | |
8851ecca | 2522 | else if (parameters->target().get_size() == 64) |
9025d29d ILT |
2523 | { |
2524 | #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE) | |
55a93433 | 2525 | ret = this->sized_finalize<64>(off, pool, plocal_symcount); |
9025d29d ILT |
2526 | #else |
2527 | gold_unreachable(); | |
2528 | #endif | |
2529 | } | |
61ba1cf9 | 2530 | else |
a3ad94ed | 2531 | gold_unreachable(); |
f6ce93d6 ILT |
2532 | |
2533 | // Now that we have the final symbol table, we can reliably note | |
2534 | // which symbols should get warnings. | |
cb295612 | 2535 | this->warnings_.note_warnings(this); |
f6ce93d6 ILT |
2536 | |
2537 | return ret; | |
75f65a3e ILT |
2538 | } |
2539 | ||
55a93433 ILT |
2540 | // SYM is going into the symbol table at *PINDEX. Add the name to |
2541 | // POOL, update *PINDEX and *POFF. | |
2542 | ||
2543 | template<int size> | |
2544 | void | |
2545 | Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool, | |
2546 | unsigned int* pindex, off_t* poff) | |
2547 | { | |
2548 | sym->set_symtab_index(*pindex); | |
6d1c4efb ILT |
2549 | if (sym->version() == NULL || !parameters->options().relocatable()) |
2550 | pool->add(sym->name(), false, NULL); | |
2551 | else | |
2552 | pool->add(sym->versioned_name(), true, NULL); | |
55a93433 ILT |
2553 | ++*pindex; |
2554 | *poff += elfcpp::Elf_sizes<size>::sym_size; | |
2555 | } | |
2556 | ||
ead1e424 ILT |
2557 | // Set the final value for all the symbols. This is called after |
2558 | // Layout::finalize, so all the output sections have their final | |
2559 | // address. | |
75f65a3e ILT |
2560 | |
2561 | template<int size> | |
2562 | off_t | |
55a93433 ILT |
2563 | Symbol_table::sized_finalize(off_t off, Stringpool* pool, |
2564 | unsigned int* plocal_symcount) | |
75f65a3e | 2565 | { |
ead1e424 | 2566 | off = align_address(off, size >> 3); |
75f65a3e ILT |
2567 | this->offset_ = off; |
2568 | ||
55a93433 ILT |
2569 | unsigned int index = *plocal_symcount; |
2570 | const unsigned int orig_index = index; | |
c06b7b0b | 2571 | |
55a93433 ILT |
2572 | // First do all the symbols which have been forced to be local, as |
2573 | // they must appear before all global symbols. | |
2574 | for (Forced_locals::iterator p = this->forced_locals_.begin(); | |
2575 | p != this->forced_locals_.end(); | |
2576 | ++p) | |
2577 | { | |
2578 | Symbol* sym = *p; | |
2579 | gold_assert(sym->is_forced_local()); | |
2580 | if (this->sized_finalize_symbol<size>(sym)) | |
2581 | { | |
2582 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
2583 | ++*plocal_symcount; | |
2584 | } | |
2585 | } | |
2586 | ||
2587 | // Now do all the remaining symbols. | |
c06b7b0b ILT |
2588 | for (Symbol_table_type::iterator p = this->table_.begin(); |
2589 | p != this->table_.end(); | |
2590 | ++p) | |
54dc6425 | 2591 | { |
55a93433 ILT |
2592 | Symbol* sym = p->second; |
2593 | if (this->sized_finalize_symbol<size>(sym)) | |
2594 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
2595 | } | |
54dc6425 | 2596 | |
55a93433 | 2597 | this->output_count_ = index - orig_index; |
a3ad94ed | 2598 | |
55a93433 ILT |
2599 | return off; |
2600 | } | |
75f65a3e | 2601 | |
c0a62865 DK |
2602 | // Compute the final value of SYM and store status in location PSTATUS. |
2603 | // During relaxation, this may be called multiple times for a symbol to | |
2604 | // compute its would-be final value in each relaxation pass. | |
008db82e | 2605 | |
55a93433 | 2606 | template<int size> |
c0a62865 DK |
2607 | typename Sized_symbol<size>::Value_type |
2608 | Symbol_table::compute_final_value( | |
2609 | const Sized_symbol<size>* sym, | |
2610 | Compute_final_value_status* pstatus) const | |
55a93433 | 2611 | { |
ef9beddf | 2612 | typedef typename Sized_symbol<size>::Value_type Value_type; |
2ea97941 | 2613 | Value_type value; |
ead1e424 | 2614 | |
55a93433 ILT |
2615 | switch (sym->source()) |
2616 | { | |
2617 | case Symbol::FROM_OBJECT: | |
2618 | { | |
d491d34e | 2619 | bool is_ordinary; |
2ea97941 | 2620 | unsigned int shndx = sym->shndx(&is_ordinary); |
ead1e424 | 2621 | |
d491d34e | 2622 | if (!is_ordinary |
2ea97941 ILT |
2623 | && shndx != elfcpp::SHN_ABS |
2624 | && !Symbol::is_common_shndx(shndx)) | |
55a93433 | 2625 | { |
c0a62865 DK |
2626 | *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION; |
2627 | return 0; | |
ead1e424 | 2628 | } |
ead1e424 | 2629 | |
55a93433 ILT |
2630 | Object* symobj = sym->object(); |
2631 | if (symobj->is_dynamic()) | |
ead1e424 | 2632 | { |
2ea97941 ILT |
2633 | value = 0; |
2634 | shndx = elfcpp::SHN_UNDEF; | |
ead1e424 | 2635 | } |
89fc3421 CC |
2636 | else if (symobj->pluginobj() != NULL) |
2637 | { | |
2ea97941 ILT |
2638 | value = 0; |
2639 | shndx = elfcpp::SHN_UNDEF; | |
89fc3421 | 2640 | } |
2ea97941 ILT |
2641 | else if (shndx == elfcpp::SHN_UNDEF) |
2642 | value = 0; | |
d491d34e | 2643 | else if (!is_ordinary |
2ea97941 ILT |
2644 | && (shndx == elfcpp::SHN_ABS |
2645 | || Symbol::is_common_shndx(shndx))) | |
2646 | value = sym->value(); | |
55a93433 | 2647 | else |
ead1e424 | 2648 | { |
55a93433 | 2649 | Relobj* relobj = static_cast<Relobj*>(symobj); |
2ea97941 | 2650 | Output_section* os = relobj->output_section(shndx); |
55a93433 | 2651 | |
2ea97941 | 2652 | if (this->is_section_folded(relobj, shndx)) |
ef15dade ST |
2653 | { |
2654 | gold_assert(os == NULL); | |
2655 | // Get the os of the section it is folded onto. | |
2656 | Section_id folded = this->icf_->get_folded_section(relobj, | |
2ea97941 | 2657 | shndx); |
ef15dade ST |
2658 | gold_assert(folded.first != NULL); |
2659 | Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first); | |
d6344fb5 DK |
2660 | unsigned folded_shndx = folded.second; |
2661 | ||
2662 | os = folded_obj->output_section(folded_shndx); | |
ef15dade | 2663 | gold_assert(os != NULL); |
d6344fb5 DK |
2664 | |
2665 | // Replace (relobj, shndx) with canonical ICF input section. | |
2666 | shndx = folded_shndx; | |
2667 | relobj = folded_obj; | |
ef15dade ST |
2668 | } |
2669 | ||
d6344fb5 | 2670 | uint64_t secoff64 = relobj->output_section_offset(shndx); |
ef15dade | 2671 | if (os == NULL) |
ead1e424 | 2672 | { |
6d03d481 ST |
2673 | bool static_or_reloc = (parameters->doing_static_link() || |
2674 | parameters->options().relocatable()); | |
2675 | gold_assert(static_or_reloc || sym->dynsym_index() == -1U); | |
2676 | ||
c0a62865 DK |
2677 | *pstatus = CFVS_NO_OUTPUT_SECTION; |
2678 | return 0; | |
ead1e424 | 2679 | } |
55a93433 | 2680 | |
eff45813 CC |
2681 | if (secoff64 == -1ULL) |
2682 | { | |
2683 | // The section needs special handling (e.g., a merge section). | |
ef15dade | 2684 | |
2ea97941 | 2685 | value = os->output_address(relobj, shndx, sym->value()); |
eff45813 CC |
2686 | } |
2687 | else | |
2688 | { | |
2689 | Value_type secoff = | |
2690 | convert_types<Value_type, uint64_t>(secoff64); | |
2691 | if (sym->type() == elfcpp::STT_TLS) | |
2ea97941 | 2692 | value = sym->value() + os->tls_offset() + secoff; |
eff45813 | 2693 | else |
2ea97941 | 2694 | value = sym->value() + os->address() + secoff; |
eff45813 | 2695 | } |
ead1e424 | 2696 | } |
55a93433 ILT |
2697 | } |
2698 | break; | |
2699 | ||
2700 | case Symbol::IN_OUTPUT_DATA: | |
2701 | { | |
2702 | Output_data* od = sym->output_data(); | |
2ea97941 | 2703 | value = sym->value(); |
155a0dd7 | 2704 | if (sym->type() != elfcpp::STT_TLS) |
2ea97941 | 2705 | value += od->address(); |
155a0dd7 ILT |
2706 | else |
2707 | { | |
2708 | Output_section* os = od->output_section(); | |
2709 | gold_assert(os != NULL); | |
2ea97941 | 2710 | value += os->tls_offset() + (od->address() - os->address()); |
155a0dd7 | 2711 | } |
55a93433 | 2712 | if (sym->offset_is_from_end()) |
2ea97941 | 2713 | value += od->data_size(); |
55a93433 ILT |
2714 | } |
2715 | break; | |
2716 | ||
2717 | case Symbol::IN_OUTPUT_SEGMENT: | |
2718 | { | |
2719 | Output_segment* os = sym->output_segment(); | |
2ea97941 | 2720 | value = sym->value(); |
edfbb029 | 2721 | if (sym->type() != elfcpp::STT_TLS) |
2ea97941 | 2722 | value += os->vaddr(); |
55a93433 ILT |
2723 | switch (sym->offset_base()) |
2724 | { | |
2725 | case Symbol::SEGMENT_START: | |
2726 | break; | |
2727 | case Symbol::SEGMENT_END: | |
2ea97941 | 2728 | value += os->memsz(); |
55a93433 ILT |
2729 | break; |
2730 | case Symbol::SEGMENT_BSS: | |
2ea97941 | 2731 | value += os->filesz(); |
55a93433 ILT |
2732 | break; |
2733 | default: | |
2734 | gold_unreachable(); | |
2735 | } | |
2736 | } | |
2737 | break; | |
ead1e424 | 2738 | |
f3e9c5c5 | 2739 | case Symbol::IS_CONSTANT: |
2ea97941 | 2740 | value = sym->value(); |
55a93433 | 2741 | break; |
ead1e424 | 2742 | |
f3e9c5c5 | 2743 | case Symbol::IS_UNDEFINED: |
2ea97941 | 2744 | value = 0; |
f3e9c5c5 ILT |
2745 | break; |
2746 | ||
55a93433 ILT |
2747 | default: |
2748 | gold_unreachable(); | |
2749 | } | |
ead1e424 | 2750 | |
c0a62865 | 2751 | *pstatus = CFVS_OK; |
2ea97941 | 2752 | return value; |
c0a62865 DK |
2753 | } |
2754 | ||
2755 | // Finalize the symbol SYM. This returns true if the symbol should be | |
2756 | // added to the symbol table, false otherwise. | |
2757 | ||
2758 | template<int size> | |
2759 | bool | |
2760 | Symbol_table::sized_finalize_symbol(Symbol* unsized_sym) | |
2761 | { | |
2762 | typedef typename Sized_symbol<size>::Value_type Value_type; | |
2763 | ||
2764 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym); | |
2765 | ||
2766 | // The default version of a symbol may appear twice in the symbol | |
2767 | // table. We only need to finalize it once. | |
2768 | if (sym->has_symtab_index()) | |
2769 | return false; | |
2770 | ||
2771 | if (!sym->in_reg()) | |
2772 | { | |
2773 | gold_assert(!sym->has_symtab_index()); | |
2774 | sym->set_symtab_index(-1U); | |
2775 | gold_assert(sym->dynsym_index() == -1U); | |
2776 | return false; | |
2777 | } | |
2778 | ||
badc8139 RÁE |
2779 | // If the symbol is only present on plugin files, the plugin decided we |
2780 | // don't need it. | |
2781 | if (!sym->in_real_elf()) | |
2782 | { | |
2783 | gold_assert(!sym->has_symtab_index()); | |
2784 | sym->set_symtab_index(-1U); | |
2785 | return false; | |
2786 | } | |
2787 | ||
c0a62865 DK |
2788 | // Compute final symbol value. |
2789 | Compute_final_value_status status; | |
2ea97941 | 2790 | Value_type value = this->compute_final_value(sym, &status); |
c0a62865 DK |
2791 | |
2792 | switch (status) | |
2793 | { | |
2794 | case CFVS_OK: | |
2795 | break; | |
2796 | case CFVS_UNSUPPORTED_SYMBOL_SECTION: | |
2797 | { | |
2798 | bool is_ordinary; | |
2ea97941 | 2799 | unsigned int shndx = sym->shndx(&is_ordinary); |
c0a62865 | 2800 | gold_error(_("%s: unsupported symbol section 0x%x"), |
2ea97941 | 2801 | sym->demangled_name().c_str(), shndx); |
c0a62865 DK |
2802 | } |
2803 | break; | |
2804 | case CFVS_NO_OUTPUT_SECTION: | |
2805 | sym->set_symtab_index(-1U); | |
2806 | return false; | |
2807 | default: | |
2808 | gold_unreachable(); | |
2809 | } | |
2810 | ||
2ea97941 | 2811 | sym->set_value(value); |
9e2dcb77 | 2812 | |
8c604651 CS |
2813 | if (parameters->options().strip_all() |
2814 | || !parameters->options().should_retain_symbol(sym->name())) | |
55a93433 ILT |
2815 | { |
2816 | sym->set_symtab_index(-1U); | |
2817 | return false; | |
54dc6425 | 2818 | } |
75f65a3e | 2819 | |
55a93433 | 2820 | return true; |
54dc6425 ILT |
2821 | } |
2822 | ||
61ba1cf9 ILT |
2823 | // Write out the global symbols. |
2824 | ||
2825 | void | |
fd9d194f | 2826 | Symbol_table::write_globals(const Stringpool* sympool, |
d491d34e ILT |
2827 | const Stringpool* dynpool, |
2828 | Output_symtab_xindex* symtab_xindex, | |
2829 | Output_symtab_xindex* dynsym_xindex, | |
2830 | Output_file* of) const | |
61ba1cf9 | 2831 | { |
8851ecca | 2832 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 2833 | { |
9025d29d | 2834 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca | 2835 | case Parameters::TARGET_32_LITTLE: |
fd9d194f | 2836 | this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex, |
d491d34e | 2837 | dynsym_xindex, of); |
8851ecca | 2838 | break; |
9025d29d | 2839 | #endif |
8851ecca ILT |
2840 | #ifdef HAVE_TARGET_32_BIG |
2841 | case Parameters::TARGET_32_BIG: | |
fd9d194f | 2842 | this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex, |
d491d34e | 2843 | dynsym_xindex, of); |
8851ecca | 2844 | break; |
9025d29d | 2845 | #endif |
9025d29d | 2846 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca | 2847 | case Parameters::TARGET_64_LITTLE: |
fd9d194f | 2848 | this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex, |
d491d34e | 2849 | dynsym_xindex, of); |
8851ecca | 2850 | break; |
9025d29d | 2851 | #endif |
8851ecca ILT |
2852 | #ifdef HAVE_TARGET_64_BIG |
2853 | case Parameters::TARGET_64_BIG: | |
fd9d194f | 2854 | this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex, |
d491d34e | 2855 | dynsym_xindex, of); |
8851ecca ILT |
2856 | break; |
2857 | #endif | |
2858 | default: | |
2859 | gold_unreachable(); | |
61ba1cf9 | 2860 | } |
61ba1cf9 ILT |
2861 | } |
2862 | ||
2863 | // Write out the global symbols. | |
2864 | ||
2865 | template<int size, bool big_endian> | |
2866 | void | |
fd9d194f | 2867 | Symbol_table::sized_write_globals(const Stringpool* sympool, |
16649710 | 2868 | const Stringpool* dynpool, |
d491d34e ILT |
2869 | Output_symtab_xindex* symtab_xindex, |
2870 | Output_symtab_xindex* dynsym_xindex, | |
61ba1cf9 ILT |
2871 | Output_file* of) const |
2872 | { | |
8851ecca | 2873 | const Target& target = parameters->target(); |
9a2d6984 | 2874 | |
61ba1cf9 | 2875 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
55a93433 ILT |
2876 | |
2877 | const unsigned int output_count = this->output_count_; | |
2878 | const section_size_type oview_size = output_count * sym_size; | |
2879 | const unsigned int first_global_index = this->first_global_index_; | |
5fe2a0f5 ILT |
2880 | unsigned char* psyms; |
2881 | if (this->offset_ == 0 || output_count == 0) | |
2882 | psyms = NULL; | |
2883 | else | |
2884 | psyms = of->get_output_view(this->offset_, oview_size); | |
16649710 | 2885 | |
55a93433 ILT |
2886 | const unsigned int dynamic_count = this->dynamic_count_; |
2887 | const section_size_type dynamic_size = dynamic_count * sym_size; | |
2888 | const unsigned int first_dynamic_global_index = | |
2889 | this->first_dynamic_global_index_; | |
16649710 | 2890 | unsigned char* dynamic_view; |
5fe2a0f5 | 2891 | if (this->dynamic_offset_ == 0 || dynamic_count == 0) |
16649710 ILT |
2892 | dynamic_view = NULL; |
2893 | else | |
2894 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); | |
c06b7b0b | 2895 | |
61ba1cf9 ILT |
2896 | for (Symbol_table_type::const_iterator p = this->table_.begin(); |
2897 | p != this->table_.end(); | |
2898 | ++p) | |
2899 | { | |
2900 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); | |
2901 | ||
9a2d6984 | 2902 | // Possibly warn about unresolved symbols in shared libraries. |
fd9d194f | 2903 | this->warn_about_undefined_dynobj_symbol(sym); |
e2827e5f | 2904 | |
a3ad94ed | 2905 | unsigned int sym_index = sym->symtab_index(); |
16649710 ILT |
2906 | unsigned int dynsym_index; |
2907 | if (dynamic_view == NULL) | |
2908 | dynsym_index = -1U; | |
2909 | else | |
2910 | dynsym_index = sym->dynsym_index(); | |
2911 | ||
2912 | if (sym_index == -1U && dynsym_index == -1U) | |
a3ad94ed ILT |
2913 | { |
2914 | // This symbol is not included in the output file. | |
2915 | continue; | |
2916 | } | |
16649710 | 2917 | |
2ea97941 | 2918 | unsigned int shndx; |
88dd47ac ILT |
2919 | typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value(); |
2920 | typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value; | |
ce279a62 | 2921 | elfcpp::STB binding = sym->binding(); |
9634ed06 CC |
2922 | |
2923 | // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL. | |
2924 | if (binding == elfcpp::STB_GNU_UNIQUE | |
2925 | && !parameters->options().gnu_unique()) | |
2926 | binding = elfcpp::STB_GLOBAL; | |
2927 | ||
ead1e424 ILT |
2928 | switch (sym->source()) |
2929 | { | |
2930 | case Symbol::FROM_OBJECT: | |
2931 | { | |
d491d34e ILT |
2932 | bool is_ordinary; |
2933 | unsigned int in_shndx = sym->shndx(&is_ordinary); | |
ead1e424 | 2934 | |
d491d34e | 2935 | if (!is_ordinary |
0dfbdef4 | 2936 | && in_shndx != elfcpp::SHN_ABS |
8a5e3e08 | 2937 | && !Symbol::is_common_shndx(in_shndx)) |
ead1e424 | 2938 | { |
75f2446e | 2939 | gold_error(_("%s: unsupported symbol section 0x%x"), |
a2b1aa12 | 2940 | sym->demangled_name().c_str(), in_shndx); |
2ea97941 | 2941 | shndx = in_shndx; |
f6ce93d6 | 2942 | } |
ead1e424 ILT |
2943 | else |
2944 | { | |
75f2446e ILT |
2945 | Object* symobj = sym->object(); |
2946 | if (symobj->is_dynamic()) | |
2947 | { | |
2948 | if (sym->needs_dynsym_value()) | |
8851ecca | 2949 | dynsym_value = target.dynsym_value(sym); |
2ea97941 | 2950 | shndx = elfcpp::SHN_UNDEF; |
ce279a62 CC |
2951 | if (sym->is_undef_binding_weak()) |
2952 | binding = elfcpp::STB_WEAK; | |
74f67560 DK |
2953 | else |
2954 | binding = elfcpp::STB_GLOBAL; | |
75f2446e | 2955 | } |
89fc3421 | 2956 | else if (symobj->pluginobj() != NULL) |
2ea97941 | 2957 | shndx = elfcpp::SHN_UNDEF; |
75f2446e | 2958 | else if (in_shndx == elfcpp::SHN_UNDEF |
d491d34e ILT |
2959 | || (!is_ordinary |
2960 | && (in_shndx == elfcpp::SHN_ABS | |
8a5e3e08 | 2961 | || Symbol::is_common_shndx(in_shndx)))) |
2ea97941 | 2962 | shndx = in_shndx; |
75f2446e ILT |
2963 | else |
2964 | { | |
2965 | Relobj* relobj = static_cast<Relobj*>(symobj); | |
ef9beddf | 2966 | Output_section* os = relobj->output_section(in_shndx); |
ef15dade ST |
2967 | if (this->is_section_folded(relobj, in_shndx)) |
2968 | { | |
2969 | // This global symbol must be written out even though | |
2970 | // it is folded. | |
2971 | // Get the os of the section it is folded onto. | |
2972 | Section_id folded = | |
2973 | this->icf_->get_folded_section(relobj, in_shndx); | |
2974 | gold_assert(folded.first !=NULL); | |
2975 | Relobj* folded_obj = | |
2976 | reinterpret_cast<Relobj*>(folded.first); | |
2977 | os = folded_obj->output_section(folded.second); | |
2978 | gold_assert(os != NULL); | |
2979 | } | |
75f2446e | 2980 | gold_assert(os != NULL); |
2ea97941 | 2981 | shndx = os->out_shndx(); |
88dd47ac | 2982 | |
2ea97941 | 2983 | if (shndx >= elfcpp::SHN_LORESERVE) |
d491d34e ILT |
2984 | { |
2985 | if (sym_index != -1U) | |
2ea97941 | 2986 | symtab_xindex->add(sym_index, shndx); |
d491d34e | 2987 | if (dynsym_index != -1U) |
2ea97941 ILT |
2988 | dynsym_xindex->add(dynsym_index, shndx); |
2989 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e ILT |
2990 | } |
2991 | ||
88dd47ac ILT |
2992 | // In object files symbol values are section |
2993 | // relative. | |
8851ecca | 2994 | if (parameters->options().relocatable()) |
88dd47ac | 2995 | sym_value -= os->address(); |
75f2446e | 2996 | } |
ead1e424 ILT |
2997 | } |
2998 | } | |
2999 | break; | |
3000 | ||
3001 | case Symbol::IN_OUTPUT_DATA: | |
502e8a84 CC |
3002 | { |
3003 | Output_data* od = sym->output_data(); | |
3004 | ||
3005 | shndx = od->out_shndx(); | |
3006 | if (shndx >= elfcpp::SHN_LORESERVE) | |
3007 | { | |
3008 | if (sym_index != -1U) | |
3009 | symtab_xindex->add(sym_index, shndx); | |
3010 | if (dynsym_index != -1U) | |
3011 | dynsym_xindex->add(dynsym_index, shndx); | |
3012 | shndx = elfcpp::SHN_XINDEX; | |
3013 | } | |
3014 | ||
3015 | // In object files symbol values are section | |
3016 | // relative. | |
3017 | if (parameters->options().relocatable()) | |
3018 | sym_value -= od->address(); | |
3019 | } | |
ead1e424 ILT |
3020 | break; |
3021 | ||
3022 | case Symbol::IN_OUTPUT_SEGMENT: | |
2ea97941 | 3023 | shndx = elfcpp::SHN_ABS; |
ead1e424 ILT |
3024 | break; |
3025 | ||
f3e9c5c5 | 3026 | case Symbol::IS_CONSTANT: |
2ea97941 | 3027 | shndx = elfcpp::SHN_ABS; |
ead1e424 ILT |
3028 | break; |
3029 | ||
f3e9c5c5 | 3030 | case Symbol::IS_UNDEFINED: |
2ea97941 | 3031 | shndx = elfcpp::SHN_UNDEF; |
f3e9c5c5 ILT |
3032 | break; |
3033 | ||
ead1e424 | 3034 | default: |
a3ad94ed | 3035 | gold_unreachable(); |
ead1e424 | 3036 | } |
61ba1cf9 | 3037 | |
16649710 ILT |
3038 | if (sym_index != -1U) |
3039 | { | |
55a93433 ILT |
3040 | sym_index -= first_global_index; |
3041 | gold_assert(sym_index < output_count); | |
3042 | unsigned char* ps = psyms + (sym_index * sym_size); | |
2ea97941 | 3043 | this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx, |
ce279a62 | 3044 | binding, sympool, ps); |
16649710 | 3045 | } |
61ba1cf9 | 3046 | |
16649710 ILT |
3047 | if (dynsym_index != -1U) |
3048 | { | |
3049 | dynsym_index -= first_dynamic_global_index; | |
3050 | gold_assert(dynsym_index < dynamic_count); | |
3051 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
2ea97941 | 3052 | this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx, |
ce279a62 | 3053 | binding, dynpool, pd); |
800d9823 CC |
3054 | // Allow a target to adjust dynamic symbol value. |
3055 | parameters->target().adjust_dyn_symbol(sym, pd); | |
16649710 | 3056 | } |
61ba1cf9 ILT |
3057 | } |
3058 | ||
c06b7b0b | 3059 | of->write_output_view(this->offset_, oview_size, psyms); |
16649710 ILT |
3060 | if (dynamic_view != NULL) |
3061 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); | |
3062 | } | |
3063 | ||
3064 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the | |
3065 | // strtab holding the name. | |
3066 | ||
3067 | template<int size, bool big_endian> | |
3068 | void | |
ab5c9e90 ILT |
3069 | Symbol_table::sized_write_symbol( |
3070 | Sized_symbol<size>* sym, | |
2ea97941 ILT |
3071 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
3072 | unsigned int shndx, | |
ce279a62 | 3073 | elfcpp::STB binding, |
ab5c9e90 | 3074 | const Stringpool* pool, |
7d1a9ebb | 3075 | unsigned char* p) const |
16649710 ILT |
3076 | { |
3077 | elfcpp::Sym_write<size, big_endian> osym(p); | |
6d1c4efb ILT |
3078 | if (sym->version() == NULL || !parameters->options().relocatable()) |
3079 | osym.put_st_name(pool->get_offset(sym->name())); | |
3080 | else | |
3081 | osym.put_st_name(pool->get_offset(sym->versioned_name())); | |
2ea97941 | 3082 | osym.put_st_value(value); |
58e54ac2 | 3083 | // Use a symbol size of zero for undefined symbols from shared libraries. |
2ea97941 | 3084 | if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj()) |
58e54ac2 CD |
3085 | osym.put_st_size(0); |
3086 | else | |
3087 | osym.put_st_size(sym->symsize()); | |
53d7974c L |
3088 | elfcpp::STT type = sym->type(); |
3089 | // Turn IFUNC symbols from shared libraries into normal FUNC symbols. | |
3090 | if (type == elfcpp::STT_GNU_IFUNC | |
3091 | && sym->is_from_dynobj()) | |
3092 | type = elfcpp::STT_FUNC; | |
55a93433 ILT |
3093 | // A version script may have overridden the default binding. |
3094 | if (sym->is_forced_local()) | |
53d7974c | 3095 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type)); |
55a93433 | 3096 | else |
ce279a62 | 3097 | osym.put_st_info(elfcpp::elf_st_info(binding, type)); |
16649710 | 3098 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); |
2ea97941 | 3099 | osym.put_st_shndx(shndx); |
61ba1cf9 ILT |
3100 | } |
3101 | ||
9a2d6984 ILT |
3102 | // Check for unresolved symbols in shared libraries. This is |
3103 | // controlled by the --allow-shlib-undefined option. | |
3104 | ||
3105 | // We only warn about libraries for which we have seen all the | |
3106 | // DT_NEEDED entries. We don't try to track down DT_NEEDED entries | |
3107 | // which were not seen in this link. If we didn't see a DT_NEEDED | |
3108 | // entry, we aren't going to be able to reliably report whether the | |
3109 | // symbol is undefined. | |
3110 | ||
fd9d194f ILT |
3111 | // We also don't warn about libraries found in a system library |
3112 | // directory (e.g., /lib or /usr/lib); we assume that those libraries | |
3113 | // are OK. This heuristic avoids problems on GNU/Linux, in which -ldl | |
3114 | // can have undefined references satisfied by ld-linux.so. | |
9a2d6984 ILT |
3115 | |
3116 | inline void | |
fd9d194f | 3117 | Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const |
9a2d6984 | 3118 | { |
d491d34e | 3119 | bool dummy; |
9a2d6984 ILT |
3120 | if (sym->source() == Symbol::FROM_OBJECT |
3121 | && sym->object()->is_dynamic() | |
d491d34e | 3122 | && sym->shndx(&dummy) == elfcpp::SHN_UNDEF |
9a2d6984 | 3123 | && sym->binding() != elfcpp::STB_WEAK |
8851ecca ILT |
3124 | && !parameters->options().allow_shlib_undefined() |
3125 | && !parameters->target().is_defined_by_abi(sym) | |
fd9d194f | 3126 | && !sym->object()->is_in_system_directory()) |
9a2d6984 ILT |
3127 | { |
3128 | // A very ugly cast. | |
3129 | Dynobj* dynobj = static_cast<Dynobj*>(sym->object()); | |
3130 | if (!dynobj->has_unknown_needed_entries()) | |
f073bbf7 | 3131 | gold_undefined_symbol(sym); |
9a2d6984 ILT |
3132 | } |
3133 | } | |
3134 | ||
a3ad94ed ILT |
3135 | // Write out a section symbol. Return the update offset. |
3136 | ||
3137 | void | |
ca09d69a | 3138 | Symbol_table::write_section_symbol(const Output_section* os, |
d491d34e | 3139 | Output_symtab_xindex* symtab_xindex, |
a3ad94ed ILT |
3140 | Output_file* of, |
3141 | off_t offset) const | |
3142 | { | |
8851ecca | 3143 | switch (parameters->size_and_endianness()) |
a3ad94ed | 3144 | { |
9025d29d | 3145 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca | 3146 | case Parameters::TARGET_32_LITTLE: |
d491d34e ILT |
3147 | this->sized_write_section_symbol<32, false>(os, symtab_xindex, of, |
3148 | offset); | |
8851ecca | 3149 | break; |
9025d29d | 3150 | #endif |
8851ecca ILT |
3151 | #ifdef HAVE_TARGET_32_BIG |
3152 | case Parameters::TARGET_32_BIG: | |
d491d34e ILT |
3153 | this->sized_write_section_symbol<32, true>(os, symtab_xindex, of, |
3154 | offset); | |
8851ecca | 3155 | break; |
9025d29d | 3156 | #endif |
9025d29d | 3157 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca | 3158 | case Parameters::TARGET_64_LITTLE: |
d491d34e ILT |
3159 | this->sized_write_section_symbol<64, false>(os, symtab_xindex, of, |
3160 | offset); | |
8851ecca | 3161 | break; |
9025d29d | 3162 | #endif |
8851ecca ILT |
3163 | #ifdef HAVE_TARGET_64_BIG |
3164 | case Parameters::TARGET_64_BIG: | |
d491d34e ILT |
3165 | this->sized_write_section_symbol<64, true>(os, symtab_xindex, of, |
3166 | offset); | |
8851ecca ILT |
3167 | break; |
3168 | #endif | |
3169 | default: | |
3170 | gold_unreachable(); | |
a3ad94ed | 3171 | } |
a3ad94ed ILT |
3172 | } |
3173 | ||
3174 | // Write out a section symbol, specialized for size and endianness. | |
3175 | ||
3176 | template<int size, bool big_endian> | |
3177 | void | |
3178 | Symbol_table::sized_write_section_symbol(const Output_section* os, | |
d491d34e | 3179 | Output_symtab_xindex* symtab_xindex, |
a3ad94ed ILT |
3180 | Output_file* of, |
3181 | off_t offset) const | |
3182 | { | |
3183 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
3184 | ||
3185 | unsigned char* pov = of->get_output_view(offset, sym_size); | |
3186 | ||
3187 | elfcpp::Sym_write<size, big_endian> osym(pov); | |
3188 | osym.put_st_name(0); | |
b4ecf66b ILT |
3189 | if (parameters->options().relocatable()) |
3190 | osym.put_st_value(0); | |
3191 | else | |
3192 | osym.put_st_value(os->address()); | |
a3ad94ed ILT |
3193 | osym.put_st_size(0); |
3194 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, | |
3195 | elfcpp::STT_SECTION)); | |
3196 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); | |
d491d34e | 3197 | |
2ea97941 ILT |
3198 | unsigned int shndx = os->out_shndx(); |
3199 | if (shndx >= elfcpp::SHN_LORESERVE) | |
d491d34e | 3200 | { |
2ea97941 ILT |
3201 | symtab_xindex->add(os->symtab_index(), shndx); |
3202 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e | 3203 | } |
2ea97941 | 3204 | osym.put_st_shndx(shndx); |
a3ad94ed ILT |
3205 | |
3206 | of->write_output_view(offset, sym_size, pov); | |
3207 | } | |
3208 | ||
abaa3995 ILT |
3209 | // Print statistical information to stderr. This is used for --stats. |
3210 | ||
3211 | void | |
3212 | Symbol_table::print_stats() const | |
3213 | { | |
3214 | #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP) | |
3215 | fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"), | |
3216 | program_name, this->table_.size(), this->table_.bucket_count()); | |
3217 | #else | |
3218 | fprintf(stderr, _("%s: symbol table entries: %zu\n"), | |
3219 | program_name, this->table_.size()); | |
3220 | #endif | |
ad8f37d1 | 3221 | this->namepool_.print_stats("symbol table stringpool"); |
abaa3995 ILT |
3222 | } |
3223 | ||
ff541f30 ILT |
3224 | // We check for ODR violations by looking for symbols with the same |
3225 | // name for which the debugging information reports that they were | |
71ff8986 | 3226 | // defined in disjoint source locations. When comparing the source |
55382fb7 ILT |
3227 | // location, we consider instances with the same base filename to be |
3228 | // the same. This is because different object files/shared libraries | |
3229 | // can include the same header file using different paths, and | |
3230 | // different optimization settings can make the line number appear to | |
3231 | // be a couple lines off, and we don't want to report an ODR violation | |
3232 | // in those cases. | |
ff541f30 ILT |
3233 | |
3234 | // This struct is used to compare line information, as returned by | |
7bf1f802 | 3235 | // Dwarf_line_info::one_addr2line. It implements a < comparison |
71ff8986 | 3236 | // operator used with std::sort. |
ff541f30 ILT |
3237 | |
3238 | struct Odr_violation_compare | |
3239 | { | |
3240 | bool | |
3241 | operator()(const std::string& s1, const std::string& s2) const | |
3242 | { | |
55382fb7 | 3243 | // Inputs should be of the form "dirname/filename:linenum" where |
71ff8986 | 3244 | // "dirname/" is optional. We want to compare just the filename:linenum. |
55382fb7 | 3245 | |
71ff8986 | 3246 | // Find the last '/' in each string. |
55382fb7 ILT |
3247 | std::string::size_type s1begin = s1.rfind('/'); |
3248 | std::string::size_type s2begin = s2.rfind('/'); | |
55382fb7 ILT |
3249 | // If there was no '/' in a string, start at the beginning. |
3250 | if (s1begin == std::string::npos) | |
3251 | s1begin = 0; | |
3252 | if (s2begin == std::string::npos) | |
3253 | s2begin = 0; | |
71ff8986 ILT |
3254 | return s1.compare(s1begin, std::string::npos, |
3255 | s2, s2begin, std::string::npos) < 0; | |
ff541f30 ILT |
3256 | } |
3257 | }; | |
3258 | ||
71ff8986 ILT |
3259 | // Returns all of the lines attached to LOC, not just the one the |
3260 | // instruction actually came from. | |
3261 | std::vector<std::string> | |
3262 | Symbol_table::linenos_from_loc(const Task* task, | |
3263 | const Symbol_location& loc) | |
3264 | { | |
3265 | // We need to lock the object in order to read it. This | |
3266 | // means that we have to run in a singleton Task. If we | |
3267 | // want to run this in a general Task for better | |
3268 | // performance, we will need one Task for object, plus | |
3269 | // appropriate locking to ensure that we don't conflict with | |
3270 | // other uses of the object. Also note, one_addr2line is not | |
3271 | // currently thread-safe. | |
3272 | Task_lock_obj<Object> tl(task, loc.object); | |
3273 | ||
3274 | std::vector<std::string> result; | |
dc3714f3 AM |
3275 | Symbol_location code_loc = loc; |
3276 | parameters->target().function_location(&code_loc); | |
71ff8986 ILT |
3277 | // 16 is the size of the object-cache that one_addr2line should use. |
3278 | std::string canonical_result = Dwarf_line_info::one_addr2line( | |
dc3714f3 | 3279 | code_loc.object, code_loc.shndx, code_loc.offset, 16, &result); |
71ff8986 ILT |
3280 | if (!canonical_result.empty()) |
3281 | result.push_back(canonical_result); | |
3282 | return result; | |
3283 | } | |
3284 | ||
3285 | // OutputIterator that records if it was ever assigned to. This | |
3286 | // allows it to be used with std::set_intersection() to check for | |
3287 | // intersection rather than computing the intersection. | |
3288 | struct Check_intersection | |
3289 | { | |
3290 | Check_intersection() | |
3291 | : value_(false) | |
3292 | {} | |
3293 | ||
3294 | bool had_intersection() const | |
3295 | { return this->value_; } | |
3296 | ||
3297 | Check_intersection& operator++() | |
3298 | { return *this; } | |
3299 | ||
3300 | Check_intersection& operator*() | |
3301 | { return *this; } | |
3302 | ||
3303 | template<typename T> | |
3304 | Check_intersection& operator=(const T&) | |
3305 | { | |
3306 | this->value_ = true; | |
3307 | return *this; | |
3308 | } | |
3309 | ||
3310 | private: | |
3311 | bool value_; | |
3312 | }; | |
3313 | ||
70e654ba | 3314 | // Check candidate_odr_violations_ to find symbols with the same name |
71ff8986 ILT |
3315 | // but apparently different definitions (different source-file/line-no |
3316 | // for each line assigned to the first instruction). | |
70e654ba ILT |
3317 | |
3318 | void | |
17a1d0a9 ILT |
3319 | Symbol_table::detect_odr_violations(const Task* task, |
3320 | const char* output_file_name) const | |
70e654ba ILT |
3321 | { |
3322 | for (Odr_map::const_iterator it = candidate_odr_violations_.begin(); | |
3323 | it != candidate_odr_violations_.end(); | |
3324 | ++it) | |
3325 | { | |
71ff8986 ILT |
3326 | const char* const symbol_name = it->first; |
3327 | ||
3328 | std::string first_object_name; | |
3329 | std::vector<std::string> first_object_linenos; | |
3330 | ||
3331 | Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator | |
3332 | locs = it->second.begin(); | |
3333 | const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator | |
3334 | locs_end = it->second.end(); | |
3335 | for (; locs != locs_end && first_object_linenos.empty(); ++locs) | |
70e654ba | 3336 | { |
71ff8986 ILT |
3337 | // Save the line numbers from the first definition to |
3338 | // compare to the other definitions. Ideally, we'd compare | |
3339 | // every definition to every other, but we don't want to | |
3340 | // take O(N^2) time to do this. This shortcut may cause | |
3341 | // false negatives that appear or disappear depending on the | |
3342 | // link order, but it won't cause false positives. | |
3343 | first_object_name = locs->object->name(); | |
3344 | first_object_linenos = this->linenos_from_loc(task, *locs); | |
70e654ba | 3345 | } |
437ddf0c CC |
3346 | if (first_object_linenos.empty()) |
3347 | continue; | |
70e654ba | 3348 | |
71ff8986 | 3349 | // Sort by Odr_violation_compare to make std::set_intersection work. |
437ddf0c | 3350 | std::string first_object_canonical_result = first_object_linenos.back(); |
71ff8986 ILT |
3351 | std::sort(first_object_linenos.begin(), first_object_linenos.end(), |
3352 | Odr_violation_compare()); | |
3353 | ||
3354 | for (; locs != locs_end; ++locs) | |
70e654ba | 3355 | { |
71ff8986 ILT |
3356 | std::vector<std::string> linenos = |
3357 | this->linenos_from_loc(task, *locs); | |
3358 | // linenos will be empty if we couldn't parse the debug info. | |
3359 | if (linenos.empty()) | |
3360 | continue; | |
3361 | // Sort by Odr_violation_compare to make std::set_intersection work. | |
437ddf0c CC |
3362 | gold_assert(!linenos.empty()); |
3363 | std::string second_object_canonical_result = linenos.back(); | |
71ff8986 ILT |
3364 | std::sort(linenos.begin(), linenos.end(), Odr_violation_compare()); |
3365 | ||
3366 | Check_intersection intersection_result = | |
3367 | std::set_intersection(first_object_linenos.begin(), | |
3368 | first_object_linenos.end(), | |
3369 | linenos.begin(), | |
3370 | linenos.end(), | |
3371 | Check_intersection(), | |
3372 | Odr_violation_compare()); | |
3373 | if (!intersection_result.had_intersection()) | |
3374 | { | |
3375 | gold_warning(_("while linking %s: symbol '%s' defined in " | |
3376 | "multiple places (possible ODR violation):"), | |
3377 | output_file_name, demangle(symbol_name).c_str()); | |
3378 | // This only prints one location from each definition, | |
3379 | // which may not be the location we expect to intersect | |
3380 | // with another definition. We could print the whole | |
3381 | // set of locations, but that seems too verbose. | |
71ff8986 | 3382 | fprintf(stderr, _(" %s from %s\n"), |
437ddf0c | 3383 | first_object_canonical_result.c_str(), |
71ff8986 ILT |
3384 | first_object_name.c_str()); |
3385 | fprintf(stderr, _(" %s from %s\n"), | |
437ddf0c | 3386 | second_object_canonical_result.c_str(), |
71ff8986 ILT |
3387 | locs->object->name().c_str()); |
3388 | // Only print one broken pair, to avoid needing to | |
3389 | // compare against a list of the disjoint definition | |
3390 | // locations we've found so far. (If we kept comparing | |
3391 | // against just the first one, we'd get a lot of | |
3392 | // redundant complaints about the second definition | |
3393 | // location.) | |
3394 | break; | |
3395 | } | |
70e654ba ILT |
3396 | } |
3397 | } | |
e4e5049b CS |
3398 | // We only call one_addr2line() in this function, so we can clear its cache. |
3399 | Dwarf_line_info::clear_addr2line_cache(); | |
70e654ba ILT |
3400 | } |
3401 | ||
f6ce93d6 ILT |
3402 | // Warnings functions. |
3403 | ||
3404 | // Add a new warning. | |
3405 | ||
3406 | void | |
2ea97941 | 3407 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, |
cb295612 | 3408 | const std::string& warning) |
f6ce93d6 | 3409 | { |
2ea97941 ILT |
3410 | name = symtab->canonicalize_name(name); |
3411 | this->warnings_[name].set(obj, warning); | |
f6ce93d6 ILT |
3412 | } |
3413 | ||
3414 | // Look through the warnings and mark the symbols for which we should | |
3415 | // warn. This is called during Layout::finalize when we know the | |
3416 | // sources for all the symbols. | |
3417 | ||
3418 | void | |
cb295612 | 3419 | Warnings::note_warnings(Symbol_table* symtab) |
f6ce93d6 ILT |
3420 | { |
3421 | for (Warning_table::iterator p = this->warnings_.begin(); | |
3422 | p != this->warnings_.end(); | |
3423 | ++p) | |
3424 | { | |
3425 | Symbol* sym = symtab->lookup(p->first, NULL); | |
3426 | if (sym != NULL | |
3427 | && sym->source() == Symbol::FROM_OBJECT | |
3428 | && sym->object() == p->second.object) | |
cb295612 | 3429 | sym->set_has_warning(); |
f6ce93d6 ILT |
3430 | } |
3431 | } | |
3432 | ||
3433 | // Issue a warning. This is called when we see a relocation against a | |
3434 | // symbol for which has a warning. | |
3435 | ||
75f2446e | 3436 | template<int size, bool big_endian> |
f6ce93d6 | 3437 | void |
75f2446e ILT |
3438 | Warnings::issue_warning(const Symbol* sym, |
3439 | const Relocate_info<size, big_endian>* relinfo, | |
3440 | size_t relnum, off_t reloffset) const | |
f6ce93d6 | 3441 | { |
a3ad94ed | 3442 | gold_assert(sym->has_warning()); |
9d3b0698 ILT |
3443 | |
3444 | // We don't want to issue a warning for a relocation against the | |
3445 | // symbol in the same object file in which the symbol is defined. | |
3446 | if (sym->object() == relinfo->object) | |
3447 | return; | |
3448 | ||
f6ce93d6 | 3449 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
a3ad94ed | 3450 | gold_assert(p != this->warnings_.end()); |
75f2446e ILT |
3451 | gold_warning_at_location(relinfo, relnum, reloffset, |
3452 | "%s", p->second.text.c_str()); | |
f6ce93d6 ILT |
3453 | } |
3454 | ||
14bfc3f5 ILT |
3455 | // Instantiate the templates we need. We could use the configure |
3456 | // script to restrict this to only the ones needed for implemented | |
3457 | // targets. | |
3458 | ||
c7912668 ILT |
3459 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3460 | template | |
3461 | void | |
3462 | Sized_symbol<32>::allocate_common(Output_data*, Value_type); | |
3463 | #endif | |
3464 | ||
3465 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3466 | template | |
3467 | void | |
3468 | Sized_symbol<64>::allocate_common(Output_data*, Value_type); | |
3469 | #endif | |
3470 | ||
193a53d9 | 3471 | #ifdef HAVE_TARGET_32_LITTLE |
14bfc3f5 ILT |
3472 | template |
3473 | void | |
193a53d9 | 3474 | Symbol_table::add_from_relobj<32, false>( |
6fa2a40b | 3475 | Sized_relobj_file<32, false>* relobj, |
f6ce93d6 | 3476 | const unsigned char* syms, |
14bfc3f5 | 3477 | size_t count, |
d491d34e | 3478 | size_t symndx_offset, |
14bfc3f5 ILT |
3479 | const char* sym_names, |
3480 | size_t sym_name_size, | |
6fa2a40b | 3481 | Sized_relobj_file<32, false>::Symbols* sympointers, |
92de84a6 | 3482 | size_t* defined); |
193a53d9 | 3483 | #endif |
14bfc3f5 | 3484 | |
193a53d9 | 3485 | #ifdef HAVE_TARGET_32_BIG |
14bfc3f5 ILT |
3486 | template |
3487 | void | |
193a53d9 | 3488 | Symbol_table::add_from_relobj<32, true>( |
6fa2a40b | 3489 | Sized_relobj_file<32, true>* relobj, |
f6ce93d6 | 3490 | const unsigned char* syms, |
14bfc3f5 | 3491 | size_t count, |
d491d34e | 3492 | size_t symndx_offset, |
14bfc3f5 ILT |
3493 | const char* sym_names, |
3494 | size_t sym_name_size, | |
6fa2a40b | 3495 | Sized_relobj_file<32, true>::Symbols* sympointers, |
92de84a6 | 3496 | size_t* defined); |
193a53d9 | 3497 | #endif |
14bfc3f5 | 3498 | |
193a53d9 | 3499 | #ifdef HAVE_TARGET_64_LITTLE |
14bfc3f5 ILT |
3500 | template |
3501 | void | |
193a53d9 | 3502 | Symbol_table::add_from_relobj<64, false>( |
6fa2a40b | 3503 | Sized_relobj_file<64, false>* relobj, |
f6ce93d6 | 3504 | const unsigned char* syms, |
14bfc3f5 | 3505 | size_t count, |
d491d34e | 3506 | size_t symndx_offset, |
14bfc3f5 ILT |
3507 | const char* sym_names, |
3508 | size_t sym_name_size, | |
6fa2a40b | 3509 | Sized_relobj_file<64, false>::Symbols* sympointers, |
92de84a6 | 3510 | size_t* defined); |
193a53d9 | 3511 | #endif |
14bfc3f5 | 3512 | |
193a53d9 | 3513 | #ifdef HAVE_TARGET_64_BIG |
14bfc3f5 ILT |
3514 | template |
3515 | void | |
193a53d9 | 3516 | Symbol_table::add_from_relobj<64, true>( |
6fa2a40b | 3517 | Sized_relobj_file<64, true>* relobj, |
f6ce93d6 | 3518 | const unsigned char* syms, |
14bfc3f5 | 3519 | size_t count, |
d491d34e | 3520 | size_t symndx_offset, |
14bfc3f5 ILT |
3521 | const char* sym_names, |
3522 | size_t sym_name_size, | |
6fa2a40b | 3523 | Sized_relobj_file<64, true>::Symbols* sympointers, |
92de84a6 | 3524 | size_t* defined); |
193a53d9 | 3525 | #endif |
14bfc3f5 | 3526 | |
89fc3421 CC |
3527 | #ifdef HAVE_TARGET_32_LITTLE |
3528 | template | |
3529 | Symbol* | |
3530 | Symbol_table::add_from_pluginobj<32, false>( | |
3531 | Sized_pluginobj<32, false>* obj, | |
3532 | const char* name, | |
3533 | const char* ver, | |
3534 | elfcpp::Sym<32, false>* sym); | |
3535 | #endif | |
3536 | ||
3537 | #ifdef HAVE_TARGET_32_BIG | |
3538 | template | |
3539 | Symbol* | |
3540 | Symbol_table::add_from_pluginobj<32, true>( | |
3541 | Sized_pluginobj<32, true>* obj, | |
3542 | const char* name, | |
3543 | const char* ver, | |
3544 | elfcpp::Sym<32, true>* sym); | |
3545 | #endif | |
3546 | ||
3547 | #ifdef HAVE_TARGET_64_LITTLE | |
3548 | template | |
3549 | Symbol* | |
3550 | Symbol_table::add_from_pluginobj<64, false>( | |
3551 | Sized_pluginobj<64, false>* obj, | |
3552 | const char* name, | |
3553 | const char* ver, | |
3554 | elfcpp::Sym<64, false>* sym); | |
3555 | #endif | |
3556 | ||
3557 | #ifdef HAVE_TARGET_64_BIG | |
3558 | template | |
3559 | Symbol* | |
3560 | Symbol_table::add_from_pluginobj<64, true>( | |
3561 | Sized_pluginobj<64, true>* obj, | |
3562 | const char* name, | |
3563 | const char* ver, | |
3564 | elfcpp::Sym<64, true>* sym); | |
3565 | #endif | |
3566 | ||
193a53d9 | 3567 | #ifdef HAVE_TARGET_32_LITTLE |
dbe717ef ILT |
3568 | template |
3569 | void | |
193a53d9 ILT |
3570 | Symbol_table::add_from_dynobj<32, false>( |
3571 | Sized_dynobj<32, false>* dynobj, | |
dbe717ef ILT |
3572 | const unsigned char* syms, |
3573 | size_t count, | |
3574 | const char* sym_names, | |
3575 | size_t sym_name_size, | |
3576 | const unsigned char* versym, | |
3577 | size_t versym_size, | |
92de84a6 | 3578 | const std::vector<const char*>* version_map, |
6fa2a40b | 3579 | Sized_relobj_file<32, false>::Symbols* sympointers, |
92de84a6 | 3580 | size_t* defined); |
193a53d9 | 3581 | #endif |
dbe717ef | 3582 | |
193a53d9 | 3583 | #ifdef HAVE_TARGET_32_BIG |
dbe717ef ILT |
3584 | template |
3585 | void | |
193a53d9 ILT |
3586 | Symbol_table::add_from_dynobj<32, true>( |
3587 | Sized_dynobj<32, true>* dynobj, | |
dbe717ef ILT |
3588 | const unsigned char* syms, |
3589 | size_t count, | |
3590 | const char* sym_names, | |
3591 | size_t sym_name_size, | |
3592 | const unsigned char* versym, | |
3593 | size_t versym_size, | |
92de84a6 | 3594 | const std::vector<const char*>* version_map, |
6fa2a40b | 3595 | Sized_relobj_file<32, true>::Symbols* sympointers, |
92de84a6 | 3596 | size_t* defined); |
193a53d9 | 3597 | #endif |
dbe717ef | 3598 | |
193a53d9 | 3599 | #ifdef HAVE_TARGET_64_LITTLE |
dbe717ef ILT |
3600 | template |
3601 | void | |
193a53d9 ILT |
3602 | Symbol_table::add_from_dynobj<64, false>( |
3603 | Sized_dynobj<64, false>* dynobj, | |
dbe717ef ILT |
3604 | const unsigned char* syms, |
3605 | size_t count, | |
3606 | const char* sym_names, | |
3607 | size_t sym_name_size, | |
3608 | const unsigned char* versym, | |
3609 | size_t versym_size, | |
92de84a6 | 3610 | const std::vector<const char*>* version_map, |
6fa2a40b | 3611 | Sized_relobj_file<64, false>::Symbols* sympointers, |
92de84a6 | 3612 | size_t* defined); |
193a53d9 | 3613 | #endif |
dbe717ef | 3614 | |
193a53d9 | 3615 | #ifdef HAVE_TARGET_64_BIG |
dbe717ef ILT |
3616 | template |
3617 | void | |
193a53d9 ILT |
3618 | Symbol_table::add_from_dynobj<64, true>( |
3619 | Sized_dynobj<64, true>* dynobj, | |
dbe717ef ILT |
3620 | const unsigned char* syms, |
3621 | size_t count, | |
3622 | const char* sym_names, | |
3623 | size_t sym_name_size, | |
3624 | const unsigned char* versym, | |
3625 | size_t versym_size, | |
92de84a6 | 3626 | const std::vector<const char*>* version_map, |
6fa2a40b | 3627 | Sized_relobj_file<64, true>::Symbols* sympointers, |
92de84a6 | 3628 | size_t* defined); |
193a53d9 | 3629 | #endif |
dbe717ef | 3630 | |
cdc29364 CC |
3631 | #ifdef HAVE_TARGET_32_LITTLE |
3632 | template | |
26d3c67d | 3633 | Sized_symbol<32>* |
cdc29364 CC |
3634 | Symbol_table::add_from_incrobj( |
3635 | Object* obj, | |
3636 | const char* name, | |
3637 | const char* ver, | |
3638 | elfcpp::Sym<32, false>* sym); | |
3639 | #endif | |
3640 | ||
3641 | #ifdef HAVE_TARGET_32_BIG | |
3642 | template | |
26d3c67d | 3643 | Sized_symbol<32>* |
cdc29364 CC |
3644 | Symbol_table::add_from_incrobj( |
3645 | Object* obj, | |
3646 | const char* name, | |
3647 | const char* ver, | |
3648 | elfcpp::Sym<32, true>* sym); | |
3649 | #endif | |
3650 | ||
3651 | #ifdef HAVE_TARGET_64_LITTLE | |
3652 | template | |
26d3c67d | 3653 | Sized_symbol<64>* |
cdc29364 CC |
3654 | Symbol_table::add_from_incrobj( |
3655 | Object* obj, | |
3656 | const char* name, | |
3657 | const char* ver, | |
3658 | elfcpp::Sym<64, false>* sym); | |
3659 | #endif | |
3660 | ||
3661 | #ifdef HAVE_TARGET_64_BIG | |
3662 | template | |
26d3c67d | 3663 | Sized_symbol<64>* |
cdc29364 CC |
3664 | Symbol_table::add_from_incrobj( |
3665 | Object* obj, | |
3666 | const char* name, | |
3667 | const char* ver, | |
3668 | elfcpp::Sym<64, true>* sym); | |
3669 | #endif | |
3670 | ||
46fe1623 ILT |
3671 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3672 | template | |
3673 | void | |
fe8718a4 | 3674 | Symbol_table::define_with_copy_reloc<32>( |
fe8718a4 ILT |
3675 | Sized_symbol<32>* sym, |
3676 | Output_data* posd, | |
2ea97941 | 3677 | elfcpp::Elf_types<32>::Elf_Addr value); |
46fe1623 ILT |
3678 | #endif |
3679 | ||
3680 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3681 | template | |
3682 | void | |
fe8718a4 | 3683 | Symbol_table::define_with_copy_reloc<64>( |
fe8718a4 ILT |
3684 | Sized_symbol<64>* sym, |
3685 | Output_data* posd, | |
2ea97941 | 3686 | elfcpp::Elf_types<64>::Elf_Addr value); |
46fe1623 ILT |
3687 | #endif |
3688 | ||
beacaa96 CC |
3689 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3690 | template | |
3691 | void | |
3692 | Sized_symbol<32>::init_output_data(const char* name, const char* version, | |
3693 | Output_data* od, Value_type value, | |
3694 | Size_type symsize, elfcpp::STT type, | |
3695 | elfcpp::STB binding, | |
3696 | elfcpp::STV visibility, | |
3697 | unsigned char nonvis, | |
3698 | bool offset_is_from_end, | |
3699 | bool is_predefined); | |
3700 | #endif | |
3701 | ||
3702 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3703 | template | |
3704 | void | |
3705 | Sized_symbol<64>::init_output_data(const char* name, const char* version, | |
3706 | Output_data* od, Value_type value, | |
3707 | Size_type symsize, elfcpp::STT type, | |
3708 | elfcpp::STB binding, | |
3709 | elfcpp::STV visibility, | |
3710 | unsigned char nonvis, | |
3711 | bool offset_is_from_end, | |
3712 | bool is_predefined); | |
3713 | #endif | |
3714 | ||
75f2446e ILT |
3715 | #ifdef HAVE_TARGET_32_LITTLE |
3716 | template | |
3717 | void | |
3718 | Warnings::issue_warning<32, false>(const Symbol* sym, | |
3719 | const Relocate_info<32, false>* relinfo, | |
3720 | size_t relnum, off_t reloffset) const; | |
3721 | #endif | |
3722 | ||
3723 | #ifdef HAVE_TARGET_32_BIG | |
3724 | template | |
3725 | void | |
3726 | Warnings::issue_warning<32, true>(const Symbol* sym, | |
3727 | const Relocate_info<32, true>* relinfo, | |
3728 | size_t relnum, off_t reloffset) const; | |
3729 | #endif | |
3730 | ||
3731 | #ifdef HAVE_TARGET_64_LITTLE | |
3732 | template | |
3733 | void | |
3734 | Warnings::issue_warning<64, false>(const Symbol* sym, | |
3735 | const Relocate_info<64, false>* relinfo, | |
3736 | size_t relnum, off_t reloffset) const; | |
3737 | #endif | |
3738 | ||
3739 | #ifdef HAVE_TARGET_64_BIG | |
3740 | template | |
3741 | void | |
3742 | Warnings::issue_warning<64, true>(const Symbol* sym, | |
3743 | const Relocate_info<64, true>* relinfo, | |
3744 | size_t relnum, off_t reloffset) const; | |
3745 | #endif | |
3746 | ||
14bfc3f5 | 3747 | } // End namespace gold. |