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14bfc3f5 ILT |
1 | // symtab.cc -- the gold symbol table |
2 | ||
82704155 | 3 | // Copyright (C) 2006-2019 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 | ||
34ca2bd7 AM |
50 | // Initialize fields in Symbol. This initializes everything except |
51 | // u1_, u2_ and source_. | |
14bfc3f5 | 52 | |
14bfc3f5 | 53 | void |
2ea97941 ILT |
54 | Symbol::init_fields(const char* name, const char* version, |
55 | elfcpp::STT type, elfcpp::STB binding, | |
56 | elfcpp::STV visibility, unsigned char nonvis) | |
14bfc3f5 | 57 | { |
2ea97941 ILT |
58 | this->name_ = name; |
59 | this->version_ = version; | |
c06b7b0b ILT |
60 | this->symtab_index_ = 0; |
61 | this->dynsym_index_ = 0; | |
0a65a3a7 | 62 | this->got_offsets_.init(); |
880cd20d | 63 | this->plt_offset_ = -1U; |
2ea97941 ILT |
64 | this->type_ = type; |
65 | this->binding_ = binding; | |
66 | this->visibility_ = visibility; | |
67 | this->nonvis_ = nonvis; | |
1564db8d ILT |
68 | this->is_def_ = false; |
69 | this->is_forwarder_ = false; | |
aeddab66 | 70 | this->has_alias_ = false; |
c06b7b0b | 71 | this->needs_dynsym_entry_ = false; |
008db82e | 72 | this->in_reg_ = false; |
ead1e424 | 73 | this->in_dyn_ = false; |
f6ce93d6 | 74 | this->has_warning_ = false; |
46fe1623 | 75 | this->is_copied_from_dynobj_ = false; |
55a93433 | 76 | this->is_forced_local_ = false; |
d491d34e | 77 | this->is_ordinary_shndx_ = false; |
89fc3421 | 78 | this->in_real_elf_ = false; |
880cd20d | 79 | this->is_defined_in_discarded_section_ = false; |
ce279a62 CC |
80 | this->undef_binding_set_ = false; |
81 | this->undef_binding_weak_ = false; | |
5146f448 | 82 | this->is_predefined_ = false; |
6eeb0170 | 83 | this->is_protected_ = false; |
565ed01a | 84 | this->non_zero_localentry_ = false; |
ead1e424 ILT |
85 | } |
86 | ||
a2b1aa12 ILT |
87 | // Return the demangled version of the symbol's name, but only |
88 | // if the --demangle flag was set. | |
89 | ||
90 | static std::string | |
2ea97941 | 91 | demangle(const char* name) |
a2b1aa12 | 92 | { |
086a1841 | 93 | if (!parameters->options().do_demangle()) |
2ea97941 | 94 | return name; |
ff541f30 | 95 | |
a2b1aa12 ILT |
96 | // cplus_demangle allocates memory for the result it returns, |
97 | // and returns NULL if the name is already demangled. | |
2ea97941 | 98 | char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS); |
a2b1aa12 | 99 | if (demangled_name == NULL) |
2ea97941 | 100 | return name; |
a2b1aa12 ILT |
101 | |
102 | std::string retval(demangled_name); | |
103 | free(demangled_name); | |
104 | return retval; | |
105 | } | |
106 | ||
107 | std::string | |
108 | Symbol::demangled_name() const | |
109 | { | |
ff541f30 | 110 | return demangle(this->name()); |
a2b1aa12 ILT |
111 | } |
112 | ||
ead1e424 ILT |
113 | // Initialize the fields in the base class Symbol for SYM in OBJECT. |
114 | ||
115 | template<int size, bool big_endian> | |
116 | void | |
2ea97941 | 117 | Symbol::init_base_object(const char* name, const char* version, Object* object, |
f3e9c5c5 ILT |
118 | const elfcpp::Sym<size, big_endian>& sym, |
119 | unsigned int st_shndx, bool is_ordinary) | |
ead1e424 | 120 | { |
2ea97941 | 121 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), |
ead1e424 | 122 | sym.get_st_visibility(), sym.get_st_nonvis()); |
34ca2bd7 AM |
123 | this->u1_.object = object; |
124 | this->u2_.shndx = st_shndx; | |
d491d34e | 125 | this->is_ordinary_shndx_ = is_ordinary; |
ead1e424 | 126 | this->source_ = FROM_OBJECT; |
2ea97941 ILT |
127 | this->in_reg_ = !object->is_dynamic(); |
128 | this->in_dyn_ = object->is_dynamic(); | |
129 | this->in_real_elf_ = object->pluginobj() == NULL; | |
14bfc3f5 ILT |
130 | } |
131 | ||
ead1e424 ILT |
132 | // Initialize the fields in the base class Symbol for a symbol defined |
133 | // in an Output_data. | |
134 | ||
135 | void | |
2ea97941 ILT |
136 | Symbol::init_base_output_data(const char* name, const char* version, |
137 | Output_data* od, elfcpp::STT type, | |
138 | elfcpp::STB binding, elfcpp::STV visibility, | |
5146f448 CC |
139 | unsigned char nonvis, bool offset_is_from_end, |
140 | bool is_predefined) | |
ead1e424 | 141 | { |
2ea97941 | 142 | this->init_fields(name, version, type, binding, visibility, nonvis); |
34ca2bd7 AM |
143 | this->u1_.output_data = od; |
144 | this->u2_.offset_is_from_end = offset_is_from_end; | |
ead1e424 | 145 | this->source_ = IN_OUTPUT_DATA; |
008db82e | 146 | this->in_reg_ = true; |
89fc3421 | 147 | this->in_real_elf_ = true; |
5146f448 | 148 | this->is_predefined_ = is_predefined; |
ead1e424 ILT |
149 | } |
150 | ||
151 | // Initialize the fields in the base class Symbol for a symbol defined | |
152 | // in an Output_segment. | |
153 | ||
154 | void | |
2ea97941 ILT |
155 | Symbol::init_base_output_segment(const char* name, const char* version, |
156 | Output_segment* os, elfcpp::STT type, | |
157 | elfcpp::STB binding, elfcpp::STV visibility, | |
158 | unsigned char nonvis, | |
5146f448 CC |
159 | Segment_offset_base offset_base, |
160 | bool is_predefined) | |
ead1e424 | 161 | { |
2ea97941 | 162 | this->init_fields(name, version, type, binding, visibility, nonvis); |
34ca2bd7 AM |
163 | this->u1_.output_segment = os; |
164 | this->u2_.offset_base = offset_base; | |
ead1e424 | 165 | this->source_ = IN_OUTPUT_SEGMENT; |
008db82e | 166 | this->in_reg_ = true; |
89fc3421 | 167 | this->in_real_elf_ = true; |
5146f448 | 168 | this->is_predefined_ = is_predefined; |
ead1e424 ILT |
169 | } |
170 | ||
171 | // Initialize the fields in the base class Symbol for a symbol defined | |
172 | // as a constant. | |
173 | ||
174 | void | |
2ea97941 ILT |
175 | Symbol::init_base_constant(const char* name, const char* version, |
176 | elfcpp::STT type, elfcpp::STB binding, | |
5146f448 CC |
177 | elfcpp::STV visibility, unsigned char nonvis, |
178 | bool is_predefined) | |
f3e9c5c5 | 179 | { |
2ea97941 | 180 | this->init_fields(name, version, type, binding, visibility, nonvis); |
f3e9c5c5 ILT |
181 | this->source_ = IS_CONSTANT; |
182 | this->in_reg_ = true; | |
89fc3421 | 183 | this->in_real_elf_ = true; |
5146f448 | 184 | this->is_predefined_ = is_predefined; |
f3e9c5c5 ILT |
185 | } |
186 | ||
187 | // Initialize the fields in the base class Symbol for an undefined | |
188 | // symbol. | |
189 | ||
190 | void | |
2ea97941 ILT |
191 | Symbol::init_base_undefined(const char* name, const char* version, |
192 | elfcpp::STT type, elfcpp::STB binding, | |
193 | elfcpp::STV visibility, unsigned char nonvis) | |
ead1e424 | 194 | { |
2ea97941 | 195 | this->init_fields(name, version, type, binding, visibility, nonvis); |
d7ab2a47 | 196 | this->dynsym_index_ = -1U; |
f3e9c5c5 | 197 | this->source_ = IS_UNDEFINED; |
008db82e | 198 | this->in_reg_ = true; |
89fc3421 | 199 | this->in_real_elf_ = true; |
ead1e424 ILT |
200 | } |
201 | ||
c7912668 ILT |
202 | // Allocate a common symbol in the base. |
203 | ||
204 | void | |
205 | Symbol::allocate_base_common(Output_data* od) | |
206 | { | |
207 | gold_assert(this->is_common()); | |
208 | this->source_ = IN_OUTPUT_DATA; | |
34ca2bd7 AM |
209 | this->u1_.output_data = od; |
210 | this->u2_.offset_is_from_end = false; | |
c7912668 ILT |
211 | } |
212 | ||
ead1e424 | 213 | // Initialize the fields in Sized_symbol for SYM in OBJECT. |
14bfc3f5 ILT |
214 | |
215 | template<int size> | |
216 | template<bool big_endian> | |
217 | void | |
2ea97941 ILT |
218 | Sized_symbol<size>::init_object(const char* name, const char* version, |
219 | Object* object, | |
f3e9c5c5 ILT |
220 | const elfcpp::Sym<size, big_endian>& sym, |
221 | unsigned int st_shndx, bool is_ordinary) | |
14bfc3f5 | 222 | { |
2ea97941 | 223 | this->init_base_object(name, version, object, sym, st_shndx, is_ordinary); |
14bfc3f5 | 224 | this->value_ = sym.get_st_value(); |
ead1e424 ILT |
225 | this->symsize_ = sym.get_st_size(); |
226 | } | |
227 | ||
228 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
229 | // Output_data. | |
230 | ||
231 | template<int size> | |
232 | void | |
2ea97941 ILT |
233 | Sized_symbol<size>::init_output_data(const char* name, const char* version, |
234 | Output_data* od, Value_type value, | |
235 | Size_type symsize, elfcpp::STT type, | |
236 | elfcpp::STB binding, | |
237 | elfcpp::STV visibility, | |
238 | unsigned char nonvis, | |
5146f448 CC |
239 | bool offset_is_from_end, |
240 | bool is_predefined) | |
ead1e424 | 241 | { |
2ea97941 | 242 | this->init_base_output_data(name, version, od, type, binding, visibility, |
5146f448 | 243 | nonvis, offset_is_from_end, is_predefined); |
2ea97941 ILT |
244 | this->value_ = value; |
245 | this->symsize_ = symsize; | |
ead1e424 ILT |
246 | } |
247 | ||
248 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
249 | // Output_segment. | |
250 | ||
251 | template<int size> | |
252 | void | |
2ea97941 ILT |
253 | Sized_symbol<size>::init_output_segment(const char* name, const char* version, |
254 | Output_segment* os, Value_type value, | |
255 | Size_type symsize, elfcpp::STT type, | |
256 | elfcpp::STB binding, | |
257 | elfcpp::STV visibility, | |
258 | unsigned char nonvis, | |
5146f448 CC |
259 | Segment_offset_base offset_base, |
260 | bool is_predefined) | |
ead1e424 | 261 | { |
2ea97941 | 262 | this->init_base_output_segment(name, version, os, type, binding, visibility, |
5146f448 | 263 | nonvis, offset_base, is_predefined); |
2ea97941 ILT |
264 | this->value_ = value; |
265 | this->symsize_ = symsize; | |
ead1e424 ILT |
266 | } |
267 | ||
268 | // Initialize the fields in Sized_symbol for a symbol defined as a | |
269 | // constant. | |
270 | ||
271 | template<int size> | |
272 | void | |
2ea97941 ILT |
273 | Sized_symbol<size>::init_constant(const char* name, const char* version, |
274 | Value_type value, Size_type symsize, | |
275 | elfcpp::STT type, elfcpp::STB binding, | |
5146f448 CC |
276 | elfcpp::STV visibility, unsigned char nonvis, |
277 | bool is_predefined) | |
ead1e424 | 278 | { |
5146f448 CC |
279 | this->init_base_constant(name, version, type, binding, visibility, nonvis, |
280 | is_predefined); | |
2ea97941 ILT |
281 | this->value_ = value; |
282 | this->symsize_ = symsize; | |
14bfc3f5 ILT |
283 | } |
284 | ||
f3e9c5c5 ILT |
285 | // Initialize the fields in Sized_symbol for an undefined symbol. |
286 | ||
287 | template<int size> | |
288 | void | |
2ea97941 | 289 | Sized_symbol<size>::init_undefined(const char* name, const char* version, |
dc1c8a16 CC |
290 | Value_type value, elfcpp::STT type, |
291 | elfcpp::STB binding, elfcpp::STV visibility, | |
292 | unsigned char nonvis) | |
f3e9c5c5 | 293 | { |
2ea97941 | 294 | this->init_base_undefined(name, version, type, binding, visibility, nonvis); |
dc1c8a16 | 295 | this->value_ = value; |
f3e9c5c5 ILT |
296 | this->symsize_ = 0; |
297 | } | |
298 | ||
6d1c4efb ILT |
299 | // Return an allocated string holding the symbol's name as |
300 | // name@version. This is used for relocatable links. | |
301 | ||
302 | std::string | |
303 | Symbol::versioned_name() const | |
304 | { | |
305 | gold_assert(this->version_ != NULL); | |
306 | std::string ret = this->name_; | |
307 | ret.push_back('@'); | |
308 | if (this->is_def_) | |
309 | ret.push_back('@'); | |
310 | ret += this->version_; | |
311 | return ret; | |
312 | } | |
313 | ||
8a5e3e08 ILT |
314 | // Return true if SHNDX represents a common symbol. |
315 | ||
316 | bool | |
2ea97941 | 317 | Symbol::is_common_shndx(unsigned int shndx) |
8a5e3e08 | 318 | { |
2ea97941 ILT |
319 | return (shndx == elfcpp::SHN_COMMON |
320 | || shndx == parameters->target().small_common_shndx() | |
321 | || shndx == parameters->target().large_common_shndx()); | |
8a5e3e08 ILT |
322 | } |
323 | ||
c7912668 ILT |
324 | // Allocate a common symbol. |
325 | ||
326 | template<int size> | |
327 | void | |
2ea97941 | 328 | Sized_symbol<size>::allocate_common(Output_data* od, Value_type value) |
c7912668 ILT |
329 | { |
330 | this->allocate_base_common(od); | |
2ea97941 | 331 | this->value_ = value; |
c7912668 ILT |
332 | } |
333 | ||
c82fbeee CS |
334 | // The ""'s around str ensure str is a string literal, so sizeof works. |
335 | #define strprefix(var, str) (strncmp(var, str, sizeof("" str "") - 1) == 0) | |
336 | ||
436ca963 ILT |
337 | // Return true if this symbol should be added to the dynamic symbol |
338 | // table. | |
339 | ||
7b549045 | 340 | bool |
ce97fa81 | 341 | Symbol::should_add_dynsym_entry(Symbol_table* symtab) const |
436ca963 | 342 | { |
badc8139 RÁE |
343 | // If the symbol is only present on plugin files, the plugin decided we |
344 | // don't need it. | |
345 | if (!this->in_real_elf()) | |
346 | return false; | |
347 | ||
436ca963 ILT |
348 | // If the symbol is used by a dynamic relocation, we need to add it. |
349 | if (this->needs_dynsym_entry()) | |
350 | return true; | |
351 | ||
6d03d481 ST |
352 | // If this symbol's section is not added, the symbol need not be added. |
353 | // The section may have been GCed. Note that export_dynamic is being | |
354 | // overridden here. This should not be done for shared objects. | |
355 | if (parameters->options().gc_sections() | |
356 | && !parameters->options().shared() | |
357 | && this->source() == Symbol::FROM_OBJECT | |
358 | && !this->object()->is_dynamic()) | |
359 | { | |
360 | Relobj* relobj = static_cast<Relobj*>(this->object()); | |
361 | bool is_ordinary; | |
2ea97941 ILT |
362 | unsigned int shndx = this->shndx(&is_ordinary); |
363 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF | |
ce97fa81 ST |
364 | && !relobj->is_section_included(shndx) |
365 | && !symtab->is_section_folded(relobj, shndx)) | |
6d03d481 ST |
366 | return false; |
367 | } | |
368 | ||
31821be0 CC |
369 | // If the symbol was forced dynamic in a --dynamic-list file |
370 | // or an --export-dynamic-symbol option, add it. | |
b24fdbf5 CC |
371 | if (!this->is_from_dynobj() |
372 | && (parameters->options().in_dynamic_list(this->name()) | |
373 | || parameters->options().is_export_dynamic_symbol(this->name()))) | |
31821be0 CC |
374 | { |
375 | if (!this->is_forced_local()) | |
376 | return true; | |
377 | gold_warning(_("Cannot export local symbol '%s'"), | |
378 | this->demangled_name().c_str()); | |
379 | return false; | |
380 | } | |
381 | ||
55a93433 ILT |
382 | // If the symbol was forced local in a version script, do not add it. |
383 | if (this->is_forced_local()) | |
384 | return false; | |
385 | ||
c82fbeee CS |
386 | // If dynamic-list-data was specified, add any STT_OBJECT. |
387 | if (parameters->options().dynamic_list_data() | |
388 | && !this->is_from_dynobj() | |
389 | && this->type() == elfcpp::STT_OBJECT) | |
390 | return true; | |
391 | ||
392 | // If --dynamic-list-cpp-new was specified, add any new/delete symbol. | |
393 | // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols. | |
394 | if ((parameters->options().dynamic_list_cpp_new() | |
395 | || parameters->options().dynamic_list_cpp_typeinfo()) | |
396 | && !this->is_from_dynobj()) | |
397 | { | |
398 | // TODO(csilvers): We could probably figure out if we're an operator | |
399 | // new/delete or typeinfo without the need to demangle. | |
2ea97941 ILT |
400 | char* demangled_name = cplus_demangle(this->name(), |
401 | DMGL_ANSI | DMGL_PARAMS); | |
402 | if (demangled_name == NULL) | |
c82fbeee CS |
403 | { |
404 | // Not a C++ symbol, so it can't satisfy these flags | |
405 | } | |
406 | else if (parameters->options().dynamic_list_cpp_new() | |
2ea97941 ILT |
407 | && (strprefix(demangled_name, "operator new") |
408 | || strprefix(demangled_name, "operator delete"))) | |
c82fbeee | 409 | { |
2ea97941 | 410 | free(demangled_name); |
c82fbeee CS |
411 | return true; |
412 | } | |
413 | else if (parameters->options().dynamic_list_cpp_typeinfo() | |
2ea97941 ILT |
414 | && (strprefix(demangled_name, "typeinfo name for") |
415 | || strprefix(demangled_name, "typeinfo for"))) | |
c82fbeee | 416 | { |
2ea97941 | 417 | free(demangled_name); |
c82fbeee CS |
418 | return true; |
419 | } | |
420 | else | |
2ea97941 | 421 | free(demangled_name); |
c82fbeee CS |
422 | } |
423 | ||
436ca963 | 424 | // If exporting all symbols or building a shared library, |
4b889c30 | 425 | // or the symbol should be globally unique (GNU_UNIQUE), |
436ca963 ILT |
426 | // and the symbol is defined in a regular object and is |
427 | // externally visible, we need to add it. | |
4b889c30 IC |
428 | if ((parameters->options().export_dynamic() |
429 | || parameters->options().shared() | |
430 | || (parameters->options().gnu_unique() | |
431 | && this->binding() == elfcpp::STB_GNU_UNIQUE)) | |
436ca963 | 432 | && !this->is_from_dynobj() |
f3ae1b28 | 433 | && !this->is_undefined() |
436ca963 ILT |
434 | && this->is_externally_visible()) |
435 | return true; | |
436 | ||
437 | return false; | |
438 | } | |
439 | ||
b3b74ddc ILT |
440 | // Return true if the final value of this symbol is known at link |
441 | // time. | |
442 | ||
443 | bool | |
444 | Symbol::final_value_is_known() const | |
445 | { | |
446 | // If we are not generating an executable, then no final values are | |
a6a17750 CC |
447 | // known, since they will change at runtime, with the exception of |
448 | // TLS symbols in a position-independent executable. | |
449 | if ((parameters->options().output_is_position_independent() | |
450 | || parameters->options().relocatable()) | |
451 | && !(this->type() == elfcpp::STT_TLS | |
452 | && parameters->options().pie())) | |
b3b74ddc ILT |
453 | return false; |
454 | ||
f3e9c5c5 ILT |
455 | // If the symbol is not from an object file, and is not undefined, |
456 | // then it is defined, and known. | |
b3b74ddc | 457 | if (this->source_ != FROM_OBJECT) |
f3e9c5c5 ILT |
458 | { |
459 | if (this->source_ != IS_UNDEFINED) | |
460 | return true; | |
461 | } | |
462 | else | |
463 | { | |
464 | // If the symbol is from a dynamic object, then the final value | |
465 | // is not known. | |
466 | if (this->object()->is_dynamic()) | |
467 | return false; | |
b3b74ddc | 468 | |
f3e9c5c5 ILT |
469 | // If the symbol is not undefined (it is defined or common), |
470 | // then the final value is known. | |
471 | if (!this->is_undefined()) | |
472 | return true; | |
473 | } | |
b3b74ddc ILT |
474 | |
475 | // If the symbol is undefined, then whether the final value is known | |
476 | // depends on whether we are doing a static link. If we are doing a | |
477 | // dynamic link, then the final value could be filled in at runtime. | |
478 | // This could reasonably be the case for a weak undefined symbol. | |
479 | return parameters->doing_static_link(); | |
480 | } | |
481 | ||
77e65537 | 482 | // Return the output section where this symbol is defined. |
a445fddf | 483 | |
77e65537 ILT |
484 | Output_section* |
485 | Symbol::output_section() const | |
a445fddf ILT |
486 | { |
487 | switch (this->source_) | |
488 | { | |
489 | case FROM_OBJECT: | |
77e65537 | 490 | { |
34ca2bd7 | 491 | unsigned int shndx = this->u2_.shndx; |
2ea97941 | 492 | if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_) |
77e65537 | 493 | { |
34ca2bd7 AM |
494 | gold_assert(!this->u1_.object->is_dynamic()); |
495 | gold_assert(this->u1_.object->pluginobj() == NULL); | |
496 | Relobj* relobj = static_cast<Relobj*>(this->u1_.object); | |
2ea97941 | 497 | return relobj->output_section(shndx); |
77e65537 ILT |
498 | } |
499 | return NULL; | |
500 | } | |
501 | ||
a445fddf | 502 | case IN_OUTPUT_DATA: |
34ca2bd7 | 503 | return this->u1_.output_data->output_section(); |
77e65537 | 504 | |
a445fddf | 505 | case IN_OUTPUT_SEGMENT: |
f3e9c5c5 ILT |
506 | case IS_CONSTANT: |
507 | case IS_UNDEFINED: | |
77e65537 ILT |
508 | return NULL; |
509 | ||
510 | default: | |
511 | gold_unreachable(); | |
512 | } | |
513 | } | |
514 | ||
515 | // Set the symbol's output section. This is used for symbols defined | |
516 | // in scripts. This should only be called after the symbol table has | |
517 | // been finalized. | |
518 | ||
519 | void | |
520 | Symbol::set_output_section(Output_section* os) | |
521 | { | |
522 | switch (this->source_) | |
523 | { | |
524 | case FROM_OBJECT: | |
525 | case IN_OUTPUT_DATA: | |
526 | gold_assert(this->output_section() == os); | |
527 | break; | |
f3e9c5c5 | 528 | case IS_CONSTANT: |
77e65537 | 529 | this->source_ = IN_OUTPUT_DATA; |
34ca2bd7 AM |
530 | this->u1_.output_data = os; |
531 | this->u2_.offset_is_from_end = false; | |
77e65537 ILT |
532 | break; |
533 | case IN_OUTPUT_SEGMENT: | |
f3e9c5c5 | 534 | case IS_UNDEFINED: |
a445fddf ILT |
535 | default: |
536 | gold_unreachable(); | |
537 | } | |
538 | } | |
539 | ||
d1bddd3c CC |
540 | // Set the symbol's output segment. This is used for pre-defined |
541 | // symbols whose segments aren't known until after layout is done | |
542 | // (e.g., __ehdr_start). | |
543 | ||
544 | void | |
545 | Symbol::set_output_segment(Output_segment* os, Segment_offset_base base) | |
546 | { | |
547 | gold_assert(this->is_predefined_); | |
548 | this->source_ = IN_OUTPUT_SEGMENT; | |
34ca2bd7 AM |
549 | this->u1_.output_segment = os; |
550 | this->u2_.offset_base = base; | |
d1bddd3c CC |
551 | } |
552 | ||
553 | // Set the symbol to undefined. This is used for pre-defined | |
554 | // symbols whose segments aren't known until after layout is done | |
555 | // (e.g., __ehdr_start). | |
556 | ||
557 | void | |
558 | Symbol::set_undefined() | |
559 | { | |
d1bddd3c CC |
560 | this->source_ = IS_UNDEFINED; |
561 | this->is_predefined_ = false; | |
562 | } | |
563 | ||
14bfc3f5 ILT |
564 | // Class Symbol_table. |
565 | ||
09124467 | 566 | Symbol_table::Symbol_table(unsigned int count, |
2ea97941 | 567 | const Version_script_info& version_script) |
aa465b19 AM |
568 | : saw_undefined_(0), offset_(0), has_gnu_output_(false), table_(count), |
569 | namepool_(), forwarders_(), commons_(), tls_commons_(), small_commons_(), | |
8a5e3e08 | 570 | large_commons_(), forced_locals_(), warnings_(), |
dc1c8a16 CC |
571 | version_script_(version_script), gc_(NULL), icf_(NULL), |
572 | target_symbols_() | |
14bfc3f5 | 573 | { |
6d013333 | 574 | namepool_.reserve(count); |
14bfc3f5 ILT |
575 | } |
576 | ||
577 | Symbol_table::~Symbol_table() | |
578 | { | |
579 | } | |
580 | ||
ad8f37d1 ILT |
581 | // The symbol table key equality function. This is called with |
582 | // Stringpool keys. | |
14bfc3f5 | 583 | |
ad8f37d1 | 584 | inline bool |
14bfc3f5 ILT |
585 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, |
586 | const Symbol_table_key& k2) const | |
587 | { | |
588 | return k1.first == k2.first && k1.second == k2.second; | |
589 | } | |
590 | ||
ef15dade | 591 | bool |
efc6fa12 | 592 | Symbol_table::is_section_folded(Relobj* obj, unsigned int shndx) const |
ef15dade | 593 | { |
032ce4e9 | 594 | return (parameters->options().icf_enabled() |
2ea97941 | 595 | && this->icf_->is_section_folded(obj, shndx)); |
ef15dade ST |
596 | } |
597 | ||
31821be0 CC |
598 | // For symbols that have been listed with a -u or --export-dynamic-symbol |
599 | // option, add them to the work list to avoid gc'ing them. | |
6d03d481 ST |
600 | |
601 | void | |
88a4108b | 602 | Symbol_table::gc_mark_undef_symbols(Layout* layout) |
6d03d481 ST |
603 | { |
604 | for (options::String_set::const_iterator p = | |
605 | parameters->options().undefined_begin(); | |
606 | p != parameters->options().undefined_end(); | |
607 | ++p) | |
608 | { | |
2ea97941 ILT |
609 | const char* name = p->c_str(); |
610 | Symbol* sym = this->lookup(name); | |
ca09d69a | 611 | gold_assert(sym != NULL); |
6d03d481 ST |
612 | if (sym->source() == Symbol::FROM_OBJECT |
613 | && !sym->object()->is_dynamic()) | |
614 | { | |
e81fea4d | 615 | this->gc_mark_symbol(sym); |
6d03d481 ST |
616 | } |
617 | } | |
88a4108b | 618 | |
31821be0 CC |
619 | for (options::String_set::const_iterator p = |
620 | parameters->options().export_dynamic_symbol_begin(); | |
621 | p != parameters->options().export_dynamic_symbol_end(); | |
622 | ++p) | |
623 | { | |
624 | const char* name = p->c_str(); | |
625 | Symbol* sym = this->lookup(name); | |
1d5dfe78 CC |
626 | // It's not an error if a symbol named by --export-dynamic-symbol |
627 | // is undefined. | |
628 | if (sym != NULL | |
629 | && sym->source() == Symbol::FROM_OBJECT | |
31821be0 CC |
630 | && !sym->object()->is_dynamic()) |
631 | { | |
e81fea4d | 632 | this->gc_mark_symbol(sym); |
31821be0 CC |
633 | } |
634 | } | |
635 | ||
88a4108b ILT |
636 | for (Script_options::referenced_const_iterator p = |
637 | layout->script_options()->referenced_begin(); | |
638 | p != layout->script_options()->referenced_end(); | |
639 | ++p) | |
640 | { | |
641 | Symbol* sym = this->lookup(p->c_str()); | |
642 | gold_assert(sym != NULL); | |
643 | if (sym->source() == Symbol::FROM_OBJECT | |
644 | && !sym->object()->is_dynamic()) | |
645 | { | |
e81fea4d | 646 | this->gc_mark_symbol(sym); |
88a4108b ILT |
647 | } |
648 | } | |
6d03d481 ST |
649 | } |
650 | ||
651 | void | |
7257cc92 | 652 | Symbol_table::gc_mark_symbol(Symbol* sym) |
6d03d481 | 653 | { |
7257cc92 | 654 | // Add the object and section to the work list. |
7257cc92 ST |
655 | bool is_ordinary; |
656 | unsigned int shndx = sym->shndx(&is_ordinary); | |
efc6fa12 | 657 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF && !sym->object()->is_dynamic()) |
6d03d481 | 658 | { |
7257cc92 | 659 | gold_assert(this->gc_!= NULL); |
efc6fa12 CC |
660 | Relobj* relobj = static_cast<Relobj*>(sym->object()); |
661 | this->gc_->worklist().push_back(Section_id(relobj, shndx)); | |
6d03d481 | 662 | } |
e81fea4d | 663 | parameters->target().gc_mark_symbol(this, sym); |
6d03d481 ST |
664 | } |
665 | ||
666 | // When doing garbage collection, keep symbols that have been seen in | |
667 | // dynamic objects. | |
668 | inline void | |
669 | Symbol_table::gc_mark_dyn_syms(Symbol* sym) | |
670 | { | |
671 | if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT | |
672 | && !sym->object()->is_dynamic()) | |
7257cc92 | 673 | this->gc_mark_symbol(sym); |
6d03d481 ST |
674 | } |
675 | ||
dd8670e5 | 676 | // Make TO a symbol which forwards to FROM. |
14bfc3f5 ILT |
677 | |
678 | void | |
679 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) | |
680 | { | |
a3ad94ed ILT |
681 | gold_assert(from != to); |
682 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); | |
14bfc3f5 ILT |
683 | this->forwarders_[from] = to; |
684 | from->set_forwarder(); | |
685 | } | |
686 | ||
61ba1cf9 ILT |
687 | // Resolve the forwards from FROM, returning the real symbol. |
688 | ||
14bfc3f5 | 689 | Symbol* |
c06b7b0b | 690 | Symbol_table::resolve_forwards(const Symbol* from) const |
14bfc3f5 | 691 | { |
a3ad94ed | 692 | gold_assert(from->is_forwarder()); |
c06b7b0b | 693 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
14bfc3f5 | 694 | this->forwarders_.find(from); |
a3ad94ed | 695 | gold_assert(p != this->forwarders_.end()); |
14bfc3f5 ILT |
696 | return p->second; |
697 | } | |
698 | ||
61ba1cf9 ILT |
699 | // Look up a symbol by name. |
700 | ||
701 | Symbol* | |
2ea97941 | 702 | Symbol_table::lookup(const char* name, const char* version) const |
61ba1cf9 | 703 | { |
f0641a0b | 704 | Stringpool::Key name_key; |
2ea97941 ILT |
705 | name = this->namepool_.find(name, &name_key); |
706 | if (name == NULL) | |
61ba1cf9 | 707 | return NULL; |
f0641a0b ILT |
708 | |
709 | Stringpool::Key version_key = 0; | |
2ea97941 | 710 | if (version != NULL) |
61ba1cf9 | 711 | { |
2ea97941 ILT |
712 | version = this->namepool_.find(version, &version_key); |
713 | if (version == NULL) | |
61ba1cf9 ILT |
714 | return NULL; |
715 | } | |
716 | ||
f0641a0b | 717 | Symbol_table_key key(name_key, version_key); |
61ba1cf9 ILT |
718 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
719 | if (p == this->table_.end()) | |
720 | return NULL; | |
721 | return p->second; | |
722 | } | |
723 | ||
14bfc3f5 ILT |
724 | // Resolve a Symbol with another Symbol. This is only used in the |
725 | // unusual case where there are references to both an unversioned | |
726 | // symbol and a symbol with a version, and we then discover that that | |
1564db8d ILT |
727 | // version is the default version. Because this is unusual, we do |
728 | // this the slow way, by converting back to an ELF symbol. | |
14bfc3f5 | 729 | |
1564db8d | 730 | template<int size, bool big_endian> |
14bfc3f5 | 731 | void |
95d14cd3 | 732 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from) |
14bfc3f5 | 733 | { |
1564db8d ILT |
734 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
735 | elfcpp::Sym_write<size, big_endian> esym(buf); | |
d491d34e | 736 | // We don't bother to set the st_name or the st_shndx field. |
1564db8d ILT |
737 | esym.put_st_value(from->value()); |
738 | esym.put_st_size(from->symsize()); | |
739 | esym.put_st_info(from->binding(), from->type()); | |
ead1e424 | 740 | esym.put_st_other(from->visibility(), from->nonvis()); |
d491d34e | 741 | bool is_ordinary; |
2ea97941 ILT |
742 | unsigned int shndx = from->shndx(&is_ordinary); |
743 | this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(), | |
b45e00b3 | 744 | from->version(), true); |
1ebd95fd ILT |
745 | if (from->in_reg()) |
746 | to->set_in_reg(); | |
747 | if (from->in_dyn()) | |
748 | to->set_in_dyn(); | |
6d03d481 ST |
749 | if (parameters->options().gc_sections()) |
750 | this->gc_mark_dyn_syms(to); | |
14bfc3f5 ILT |
751 | } |
752 | ||
0602e05a ILT |
753 | // Record that a symbol is forced to be local by a version script or |
754 | // by visibility. | |
55a93433 ILT |
755 | |
756 | void | |
757 | Symbol_table::force_local(Symbol* sym) | |
758 | { | |
759 | if (!sym->is_defined() && !sym->is_common()) | |
760 | return; | |
761 | if (sym->is_forced_local()) | |
762 | { | |
763 | // We already got this one. | |
764 | return; | |
765 | } | |
766 | sym->set_is_forced_local(); | |
767 | this->forced_locals_.push_back(sym); | |
768 | } | |
769 | ||
0864d551 ILT |
770 | // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This |
771 | // is only called for undefined symbols, when at least one --wrap | |
772 | // option was used. | |
773 | ||
774 | const char* | |
2ea97941 | 775 | Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key) |
0864d551 ILT |
776 | { |
777 | // For some targets, we need to ignore a specific character when | |
778 | // wrapping, and add it back later. | |
779 | char prefix = '\0'; | |
2ea97941 | 780 | if (name[0] == parameters->target().wrap_char()) |
0864d551 | 781 | { |
2ea97941 ILT |
782 | prefix = name[0]; |
783 | ++name; | |
0864d551 ILT |
784 | } |
785 | ||
2ea97941 | 786 | if (parameters->options().is_wrap(name)) |
0864d551 ILT |
787 | { |
788 | // Turn NAME into __wrap_NAME. | |
789 | std::string s; | |
790 | if (prefix != '\0') | |
791 | s += prefix; | |
792 | s += "__wrap_"; | |
2ea97941 | 793 | s += name; |
0864d551 ILT |
794 | |
795 | // This will give us both the old and new name in NAMEPOOL_, but | |
796 | // that is OK. Only the versions we need will wind up in the | |
797 | // real string table in the output file. | |
798 | return this->namepool_.add(s.c_str(), true, name_key); | |
799 | } | |
800 | ||
801 | const char* const real_prefix = "__real_"; | |
802 | const size_t real_prefix_length = strlen(real_prefix); | |
2ea97941 ILT |
803 | if (strncmp(name, real_prefix, real_prefix_length) == 0 |
804 | && parameters->options().is_wrap(name + real_prefix_length)) | |
0864d551 ILT |
805 | { |
806 | // Turn __real_NAME into NAME. | |
807 | std::string s; | |
808 | if (prefix != '\0') | |
809 | s += prefix; | |
2ea97941 | 810 | s += name + real_prefix_length; |
0864d551 ILT |
811 | return this->namepool_.add(s.c_str(), true, name_key); |
812 | } | |
813 | ||
2ea97941 | 814 | return name; |
0864d551 ILT |
815 | } |
816 | ||
8c500701 ILT |
817 | // This is called when we see a symbol NAME/VERSION, and the symbol |
818 | // already exists in the symbol table, and VERSION is marked as being | |
819 | // the default version. SYM is the NAME/VERSION symbol we just added. | |
820 | // DEFAULT_IS_NEW is true if this is the first time we have seen the | |
821 | // symbol NAME/NULL. PDEF points to the entry for NAME/NULL. | |
822 | ||
823 | template<int size, bool big_endian> | |
824 | void | |
825 | Symbol_table::define_default_version(Sized_symbol<size>* sym, | |
826 | bool default_is_new, | |
827 | Symbol_table_type::iterator pdef) | |
828 | { | |
829 | if (default_is_new) | |
830 | { | |
831 | // This is the first time we have seen NAME/NULL. Make | |
832 | // NAME/NULL point to NAME/VERSION, and mark SYM as the default | |
833 | // version. | |
834 | pdef->second = sym; | |
835 | sym->set_is_default(); | |
836 | } | |
837 | else if (pdef->second == sym) | |
838 | { | |
839 | // NAME/NULL already points to NAME/VERSION. Don't mark the | |
840 | // symbol as the default if it is not already the default. | |
841 | } | |
842 | else | |
843 | { | |
844 | // This is the unfortunate case where we already have entries | |
845 | // for both NAME/VERSION and NAME/NULL. We now see a symbol | |
846 | // NAME/VERSION where VERSION is the default version. We have | |
847 | // already resolved this new symbol with the existing | |
848 | // NAME/VERSION symbol. | |
849 | ||
850 | // It's possible that NAME/NULL and NAME/VERSION are both | |
851 | // defined in regular objects. This can only happen if one | |
852 | // object file defines foo and another defines foo@@ver. This | |
853 | // is somewhat obscure, but we call it a multiple definition | |
854 | // error. | |
855 | ||
856 | // It's possible that NAME/NULL actually has a version, in which | |
857 | // case it won't be the same as VERSION. This happens with | |
858 | // ver_test_7.so in the testsuite for the symbol t2_2. We see | |
859 | // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We | |
860 | // then see an unadorned t2_2 in an object file and give it | |
861 | // version VER1 from the version script. This looks like a | |
862 | // default definition for VER1, so it looks like we should merge | |
863 | // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's | |
864 | // not obvious that this is an error, either. So we just punt. | |
865 | ||
866 | // If one of the symbols has non-default visibility, and the | |
867 | // other is defined in a shared object, then they are different | |
868 | // symbols. | |
869 | ||
b60ecbc6 CC |
870 | // If the two symbols are from different shared objects, |
871 | // they are different symbols. | |
872 | ||
8c500701 ILT |
873 | // Otherwise, we just resolve the symbols as though they were |
874 | // the same. | |
875 | ||
876 | if (pdef->second->version() != NULL) | |
877 | gold_assert(pdef->second->version() != sym->version()); | |
878 | else if (sym->visibility() != elfcpp::STV_DEFAULT | |
879 | && pdef->second->is_from_dynobj()) | |
880 | ; | |
881 | else if (pdef->second->visibility() != elfcpp::STV_DEFAULT | |
882 | && sym->is_from_dynobj()) | |
883 | ; | |
b60ecbc6 CC |
884 | else if (pdef->second->is_from_dynobj() |
885 | && sym->is_from_dynobj() | |
e3f07b5b | 886 | && pdef->second->is_defined() |
b60ecbc6 CC |
887 | && pdef->second->object() != sym->object()) |
888 | ; | |
8c500701 ILT |
889 | else |
890 | { | |
891 | const Sized_symbol<size>* symdef; | |
892 | symdef = this->get_sized_symbol<size>(pdef->second); | |
893 | Symbol_table::resolve<size, big_endian>(sym, symdef); | |
894 | this->make_forwarder(pdef->second, sym); | |
895 | pdef->second = sym; | |
896 | sym->set_is_default(); | |
897 | } | |
898 | } | |
899 | } | |
900 | ||
14bfc3f5 ILT |
901 | // Add one symbol from OBJECT to the symbol table. NAME is symbol |
902 | // name and VERSION is the version; both are canonicalized. DEF is | |
d491d34e ILT |
903 | // whether this is the default version. ST_SHNDX is the symbol's |
904 | // section index; IS_ORDINARY is whether this is a normal section | |
905 | // rather than a special code. | |
14bfc3f5 | 906 | |
8781f709 ILT |
907 | // If IS_DEFAULT_VERSION is true, then this is the definition of a |
908 | // default version of a symbol. That means that any lookup of | |
909 | // NAME/NULL and any lookup of NAME/VERSION should always return the | |
910 | // same symbol. This is obvious for references, but in particular we | |
911 | // want to do this for definitions: overriding NAME/NULL should also | |
912 | // override NAME/VERSION. If we don't do that, it would be very hard | |
913 | // to override functions in a shared library which uses versioning. | |
14bfc3f5 ILT |
914 | |
915 | // We implement this by simply making both entries in the hash table | |
916 | // point to the same Symbol structure. That is easy enough if this is | |
917 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible | |
918 | // that we have seen both already, in which case they will both have | |
919 | // independent entries in the symbol table. We can't simply change | |
920 | // the symbol table entry, because we have pointers to the entries | |
921 | // attached to the object files. So we mark the entry attached to the | |
922 | // object file as a forwarder, and record it in the forwarders_ map. | |
923 | // Note that entries in the hash table will never be marked as | |
924 | // forwarders. | |
70e654ba | 925 | // |
d491d34e ILT |
926 | // ORIG_ST_SHNDX and ST_SHNDX are almost always the same. |
927 | // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF | |
928 | // for a special section code. ST_SHNDX may be modified if the symbol | |
929 | // is defined in a section being discarded. | |
14bfc3f5 ILT |
930 | |
931 | template<int size, bool big_endian> | |
aeddab66 | 932 | Sized_symbol<size>* |
2ea97941 | 933 | Symbol_table::add_from_object(Object* object, |
ca09d69a | 934 | const char* name, |
f0641a0b | 935 | Stringpool::Key name_key, |
ca09d69a | 936 | const char* version, |
f0641a0b | 937 | Stringpool::Key version_key, |
8781f709 | 938 | bool is_default_version, |
70e654ba | 939 | const elfcpp::Sym<size, big_endian>& sym, |
d491d34e ILT |
940 | unsigned int st_shndx, |
941 | bool is_ordinary, | |
942 | unsigned int orig_st_shndx) | |
14bfc3f5 | 943 | { |
c5818ff1 | 944 | // Print a message if this symbol is being traced. |
2ea97941 | 945 | if (parameters->options().is_trace_symbol(name)) |
c5818ff1 | 946 | { |
d491d34e | 947 | if (orig_st_shndx == elfcpp::SHN_UNDEF) |
2ea97941 | 948 | gold_info(_("%s: reference to %s"), object->name().c_str(), name); |
c5818ff1 | 949 | else |
2ea97941 | 950 | gold_info(_("%s: definition of %s"), object->name().c_str(), name); |
c5818ff1 CC |
951 | } |
952 | ||
0864d551 ILT |
953 | // For an undefined symbol, we may need to adjust the name using |
954 | // --wrap. | |
d491d34e | 955 | if (orig_st_shndx == elfcpp::SHN_UNDEF |
c5818ff1 | 956 | && parameters->options().any_wrap()) |
0864d551 | 957 | { |
2ea97941 ILT |
958 | const char* wrap_name = this->wrap_symbol(name, &name_key); |
959 | if (wrap_name != name) | |
0864d551 ILT |
960 | { |
961 | // If we see a reference to malloc with version GLIBC_2.0, | |
962 | // and we turn it into a reference to __wrap_malloc, then we | |
963 | // discard the version number. Otherwise the user would be | |
964 | // required to specify the correct version for | |
965 | // __wrap_malloc. | |
2ea97941 | 966 | version = NULL; |
0864d551 | 967 | version_key = 0; |
2ea97941 | 968 | name = wrap_name; |
0864d551 ILT |
969 | } |
970 | } | |
971 | ||
14bfc3f5 ILT |
972 | Symbol* const snull = NULL; |
973 | std::pair<typename Symbol_table_type::iterator, bool> ins = | |
f0641a0b ILT |
974 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
975 | snull)); | |
14bfc3f5 | 976 | |
8781f709 | 977 | std::pair<typename Symbol_table_type::iterator, bool> insdefault = |
14bfc3f5 | 978 | std::make_pair(this->table_.end(), false); |
8781f709 | 979 | if (is_default_version) |
14bfc3f5 | 980 | { |
f0641a0b | 981 | const Stringpool::Key vnull_key = 0; |
8781f709 ILT |
982 | insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key, |
983 | vnull_key), | |
984 | snull)); | |
14bfc3f5 ILT |
985 | } |
986 | ||
987 | // ins.first: an iterator, which is a pointer to a pair. | |
988 | // ins.first->first: the key (a pair of name and version). | |
989 | // ins.first->second: the value (Symbol*). | |
990 | // ins.second: true if new entry was inserted, false if not. | |
991 | ||
890d1555 | 992 | Sized_symbol<size>* ret = NULL; |
71739b69 | 993 | bool was_undefined_in_reg; |
ead1e424 | 994 | bool was_common; |
14bfc3f5 ILT |
995 | if (!ins.second) |
996 | { | |
997 | // We already have an entry for NAME/VERSION. | |
7d1a9ebb | 998 | ret = this->get_sized_symbol<size>(ins.first->second); |
a3ad94ed | 999 | gold_assert(ret != NULL); |
ead1e424 | 1000 | |
71739b69 | 1001 | was_undefined_in_reg = ret->is_undefined() && ret->in_reg(); |
1707f183 CC |
1002 | // Commons from plugins are just placeholders. |
1003 | was_common = ret->is_common() && ret->object()->pluginobj() == NULL; | |
ead1e424 | 1004 | |
2ea97941 | 1005 | this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object, |
b45e00b3 | 1006 | version, is_default_version); |
6d03d481 ST |
1007 | if (parameters->options().gc_sections()) |
1008 | this->gc_mark_dyn_syms(ret); | |
14bfc3f5 | 1009 | |
8781f709 ILT |
1010 | if (is_default_version) |
1011 | this->define_default_version<size, big_endian>(ret, insdefault.second, | |
1012 | insdefault.first); | |
3ac0a36c | 1013 | else |
b45e00b3 | 1014 | { |
b45e00b3 | 1015 | bool dummy; |
3ac0a36c CC |
1016 | if (version != NULL |
1017 | && ret->source() == Symbol::FROM_OBJECT | |
b45e00b3 CC |
1018 | && ret->object() == object |
1019 | && is_ordinary | |
3ac0a36c CC |
1020 | && ret->shndx(&dummy) == st_shndx |
1021 | && ret->is_default()) | |
b45e00b3 | 1022 | { |
3ac0a36c CC |
1023 | // We have seen NAME/VERSION already, and marked it as the |
1024 | // default version, but now we see a definition for | |
1025 | // NAME/VERSION that is not the default version. This can | |
1026 | // happen when the assembler generates two symbols for | |
1027 | // a symbol as a result of a ".symver foo,foo@VER" | |
1028 | // directive. We see the first unversioned symbol and | |
1029 | // we may mark it as the default version (from a | |
1030 | // version script); then we see the second versioned | |
1031 | // symbol and we need to override the first. | |
1032 | // In any other case, the two symbols should have generated | |
1033 | // a multiple definition error. | |
1034 | // (See PR gold/18703.) | |
b45e00b3 CC |
1035 | ret->set_is_not_default(); |
1036 | const Stringpool::Key vnull_key = 0; | |
1037 | this->table_.erase(std::make_pair(name_key, vnull_key)); | |
1038 | } | |
1039 | } | |
14bfc3f5 ILT |
1040 | } |
1041 | else | |
1042 | { | |
1043 | // This is the first time we have seen NAME/VERSION. | |
a3ad94ed | 1044 | gold_assert(ins.first->second == NULL); |
ead1e424 | 1045 | |
8781f709 | 1046 | if (is_default_version && !insdefault.second) |
14bfc3f5 | 1047 | { |
14b31740 ILT |
1048 | // We already have an entry for NAME/NULL. If we override |
1049 | // it, then change it to NAME/VERSION. | |
8781f709 | 1050 | ret = this->get_sized_symbol<size>(insdefault.first->second); |
18e6b24e | 1051 | |
890d1555 CC |
1052 | // If the existing symbol already has a version, |
1053 | // don't override it with the new symbol. | |
1054 | // This should only happen when the new symbol | |
1055 | // is from a shared library. | |
1056 | if (ret->version() != NULL) | |
1057 | { | |
1058 | if (!object->is_dynamic()) | |
1059 | { | |
1060 | gold_warning(_("%s: conflicting default version definition" | |
1061 | " for %s@@%s"), | |
1062 | object->name().c_str(), name, version); | |
1063 | if (ret->source() == Symbol::FROM_OBJECT) | |
1064 | gold_info(_("%s: %s: previous definition of %s@@%s here"), | |
1065 | program_name, | |
1066 | ret->object()->name().c_str(), | |
1067 | name, ret->version()); | |
1068 | } | |
1069 | ret = NULL; | |
1070 | is_default_version = false; | |
1071 | } | |
1072 | else | |
1073 | { | |
1074 | was_undefined_in_reg = ret->is_undefined() && ret->in_reg(); | |
1075 | // Commons from plugins are just placeholders. | |
1076 | was_common = (ret->is_common() | |
1077 | && ret->object()->pluginobj() == NULL); | |
1078 | ||
1079 | this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, | |
1080 | object, version, is_default_version); | |
1081 | if (parameters->options().gc_sections()) | |
1082 | this->gc_mark_dyn_syms(ret); | |
1083 | ins.first->second = ret; | |
1084 | } | |
14bfc3f5 | 1085 | } |
890d1555 CC |
1086 | |
1087 | if (ret == NULL) | |
14bfc3f5 | 1088 | { |
71739b69 | 1089 | was_undefined_in_reg = false; |
18e6b24e ILT |
1090 | was_common = false; |
1091 | ||
f6ce93d6 | 1092 | Sized_target<size, big_endian>* target = |
029ba973 | 1093 | parameters->sized_target<size, big_endian>(); |
1564db8d ILT |
1094 | if (!target->has_make_symbol()) |
1095 | ret = new Sized_symbol<size>(); | |
1096 | else | |
14bfc3f5 | 1097 | { |
dc1c8a16 CC |
1098 | ret = target->make_symbol(name, sym.get_st_type(), object, |
1099 | st_shndx, sym.get_st_value()); | |
1564db8d | 1100 | if (ret == NULL) |
14bfc3f5 ILT |
1101 | { |
1102 | // This means that we don't want a symbol table | |
1103 | // entry after all. | |
8781f709 | 1104 | if (!is_default_version) |
14bfc3f5 ILT |
1105 | this->table_.erase(ins.first); |
1106 | else | |
1107 | { | |
8781f709 ILT |
1108 | this->table_.erase(insdefault.first); |
1109 | // Inserting INSDEFAULT invalidated INS. | |
f0641a0b ILT |
1110 | this->table_.erase(std::make_pair(name_key, |
1111 | version_key)); | |
14bfc3f5 ILT |
1112 | } |
1113 | return NULL; | |
1114 | } | |
1115 | } | |
14bfc3f5 | 1116 | |
2ea97941 | 1117 | ret->init_object(name, version, object, sym, st_shndx, is_ordinary); |
1564db8d | 1118 | |
14bfc3f5 | 1119 | ins.first->second = ret; |
8781f709 | 1120 | if (is_default_version) |
14bfc3f5 ILT |
1121 | { |
1122 | // This is the first time we have seen NAME/NULL. Point | |
1123 | // it at the new entry for NAME/VERSION. | |
8781f709 ILT |
1124 | gold_assert(insdefault.second); |
1125 | insdefault.first->second = ret; | |
14bfc3f5 ILT |
1126 | } |
1127 | } | |
8c500701 | 1128 | |
8781f709 | 1129 | if (is_default_version) |
8c500701 | 1130 | ret->set_is_default(); |
14bfc3f5 ILT |
1131 | } |
1132 | ||
71739b69 SC |
1133 | // Record every time we see a new undefined symbol, to speed up archive |
1134 | // groups. We only care about symbols undefined in regular objects here | |
1135 | // because undefined symbols only in dynamic objects should't trigger rescans. | |
1136 | if (!was_undefined_in_reg && ret->is_undefined() && ret->in_reg()) | |
0f3b89d8 ILT |
1137 | { |
1138 | ++this->saw_undefined_; | |
1139 | if (parameters->options().has_plugins()) | |
1140 | parameters->options().plugins()->new_undefined_symbol(ret); | |
1141 | } | |
ead1e424 ILT |
1142 | |
1143 | // Keep track of common symbols, to speed up common symbol | |
1707f183 CC |
1144 | // allocation. Don't record commons from plugin objects; |
1145 | // we need to wait until we see the real symbol in the | |
1146 | // replacement file. | |
1147 | if (!was_common && ret->is_common() && ret->object()->pluginobj() == NULL) | |
155a0dd7 | 1148 | { |
8a5e3e08 | 1149 | if (ret->type() == elfcpp::STT_TLS) |
155a0dd7 | 1150 | this->tls_commons_.push_back(ret); |
8a5e3e08 ILT |
1151 | else if (!is_ordinary |
1152 | && st_shndx == parameters->target().small_common_shndx()) | |
1153 | this->small_commons_.push_back(ret); | |
1154 | else if (!is_ordinary | |
1155 | && st_shndx == parameters->target().large_common_shndx()) | |
1156 | this->large_commons_.push_back(ret); | |
1157 | else | |
1158 | this->commons_.push_back(ret); | |
155a0dd7 | 1159 | } |
ead1e424 | 1160 | |
0602e05a ILT |
1161 | // If we're not doing a relocatable link, then any symbol with |
1162 | // hidden or internal visibility is local. | |
1163 | if ((ret->visibility() == elfcpp::STV_HIDDEN | |
1164 | || ret->visibility() == elfcpp::STV_INTERNAL) | |
1165 | && (ret->binding() == elfcpp::STB_GLOBAL | |
adcf2816 | 1166 | || ret->binding() == elfcpp::STB_GNU_UNIQUE |
0602e05a ILT |
1167 | || ret->binding() == elfcpp::STB_WEAK) |
1168 | && !parameters->options().relocatable()) | |
1169 | this->force_local(ret); | |
1170 | ||
14bfc3f5 ILT |
1171 | return ret; |
1172 | } | |
1173 | ||
f6ce93d6 | 1174 | // Add all the symbols in a relocatable object to the hash table. |
14bfc3f5 ILT |
1175 | |
1176 | template<int size, bool big_endian> | |
1177 | void | |
dbe717ef | 1178 | Symbol_table::add_from_relobj( |
6fa2a40b | 1179 | Sized_relobj_file<size, big_endian>* relobj, |
f6ce93d6 | 1180 | const unsigned char* syms, |
14bfc3f5 | 1181 | size_t count, |
d491d34e | 1182 | size_t symndx_offset, |
14bfc3f5 ILT |
1183 | const char* sym_names, |
1184 | size_t sym_name_size, | |
6fa2a40b | 1185 | typename Sized_relobj_file<size, big_endian>::Symbols* sympointers, |
ca09d69a | 1186 | size_t* defined) |
14bfc3f5 | 1187 | { |
92de84a6 ILT |
1188 | *defined = 0; |
1189 | ||
8851ecca | 1190 | gold_assert(size == parameters->target().get_size()); |
14bfc3f5 | 1191 | |
a783673b ILT |
1192 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
1193 | ||
88dd47ac ILT |
1194 | const bool just_symbols = relobj->just_symbols(); |
1195 | ||
f6ce93d6 | 1196 | const unsigned char* p = syms; |
a783673b | 1197 | for (size_t i = 0; i < count; ++i, p += sym_size) |
14bfc3f5 | 1198 | { |
92de84a6 ILT |
1199 | (*sympointers)[i] = NULL; |
1200 | ||
14bfc3f5 ILT |
1201 | elfcpp::Sym<size, big_endian> sym(p); |
1202 | ||
d491d34e | 1203 | unsigned int st_name = sym.get_st_name(); |
14bfc3f5 ILT |
1204 | if (st_name >= sym_name_size) |
1205 | { | |
75f2446e ILT |
1206 | relobj->error(_("bad global symbol name offset %u at %zu"), |
1207 | st_name, i); | |
1208 | continue; | |
14bfc3f5 ILT |
1209 | } |
1210 | ||
2ea97941 | 1211 | const char* name = sym_names + st_name; |
dbe717ef | 1212 | |
bebf4942 | 1213 | if (!parameters->options().relocatable() |
e601d38b AM |
1214 | && name[0] == '_' |
1215 | && name[1] == '_' | |
1216 | && strcmp (name + (name[2] == '_'), "__gnu_lto_slim") == 0) | |
7cd4e5b7 AM |
1217 | gold_info(_("%s: plugin needed to handle lto object"), |
1218 | relobj->name().c_str()); | |
1219 | ||
d491d34e ILT |
1220 | bool is_ordinary; |
1221 | unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset, | |
1222 | sym.get_st_shndx(), | |
1223 | &is_ordinary); | |
1224 | unsigned int orig_st_shndx = st_shndx; | |
1225 | if (!is_ordinary) | |
1226 | orig_st_shndx = elfcpp::SHN_UNDEF; | |
1227 | ||
92de84a6 ILT |
1228 | if (st_shndx != elfcpp::SHN_UNDEF) |
1229 | ++*defined; | |
1230 | ||
a783673b ILT |
1231 | // A symbol defined in a section which we are not including must |
1232 | // be treated as an undefined symbol. | |
880cd20d | 1233 | bool is_defined_in_discarded_section = false; |
a783673b | 1234 | if (st_shndx != elfcpp::SHN_UNDEF |
d491d34e | 1235 | && is_ordinary |
ce97fa81 ST |
1236 | && !relobj->is_section_included(st_shndx) |
1237 | && !this->is_section_folded(relobj, st_shndx)) | |
880cd20d ILT |
1238 | { |
1239 | st_shndx = elfcpp::SHN_UNDEF; | |
1240 | is_defined_in_discarded_section = true; | |
1241 | } | |
a783673b | 1242 | |
14bfc3f5 ILT |
1243 | // In an object file, an '@' in the name separates the symbol |
1244 | // name from the version name. If there are two '@' characters, | |
1245 | // this is the default version. | |
2ea97941 | 1246 | const char* ver = strchr(name, '@'); |
057ead22 | 1247 | Stringpool::Key ver_key = 0; |
09124467 | 1248 | int namelen = 0; |
8781f709 ILT |
1249 | // IS_DEFAULT_VERSION: is the version default? |
1250 | // IS_FORCED_LOCAL: is the symbol forced local? | |
1251 | bool is_default_version = false; | |
1252 | bool is_forced_local = false; | |
09124467 | 1253 | |
a7dac153 CC |
1254 | // FIXME: For incremental links, we don't store version information, |
1255 | // so we need to ignore version symbols for now. | |
1256 | if (parameters->incremental_update() && ver != NULL) | |
1257 | { | |
1258 | namelen = ver - name; | |
1259 | ver = NULL; | |
1260 | } | |
1261 | ||
09124467 ILT |
1262 | if (ver != NULL) |
1263 | { | |
1264 | // The symbol name is of the form foo@VERSION or foo@@VERSION | |
2ea97941 | 1265 | namelen = ver - name; |
09124467 ILT |
1266 | ++ver; |
1267 | if (*ver == '@') | |
1268 | { | |
8781f709 | 1269 | is_default_version = true; |
09124467 ILT |
1270 | ++ver; |
1271 | } | |
057ead22 | 1272 | ver = this->namepool_.add(ver, true, &ver_key); |
09124467 | 1273 | } |
5871526f ILT |
1274 | // We don't want to assign a version to an undefined symbol, |
1275 | // even if it is listed in the version script. FIXME: What | |
1276 | // about a common symbol? | |
057ead22 ILT |
1277 | else |
1278 | { | |
2ea97941 | 1279 | namelen = strlen(name); |
057ead22 ILT |
1280 | if (!this->version_script_.empty() |
1281 | && st_shndx != elfcpp::SHN_UNDEF) | |
1282 | { | |
1283 | // The symbol name did not have a version, but the | |
1284 | // version script may assign a version anyway. | |
2ea97941 | 1285 | std::string version; |
98e090bd ILT |
1286 | bool is_global; |
1287 | if (this->version_script_.get_symbol_version(name, &version, | |
1288 | &is_global)) | |
057ead22 | 1289 | { |
98e090bd ILT |
1290 | if (!is_global) |
1291 | is_forced_local = true; | |
1292 | else if (!version.empty()) | |
057ead22 | 1293 | { |
2ea97941 ILT |
1294 | ver = this->namepool_.add_with_length(version.c_str(), |
1295 | version.length(), | |
057ead22 ILT |
1296 | true, |
1297 | &ver_key); | |
8781f709 | 1298 | is_default_version = true; |
057ead22 ILT |
1299 | } |
1300 | } | |
057ead22 ILT |
1301 | } |
1302 | } | |
14bfc3f5 | 1303 | |
d491d34e ILT |
1304 | elfcpp::Sym<size, big_endian>* psym = &sym; |
1305 | unsigned char symbuf[sym_size]; | |
1306 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
88dd47ac ILT |
1307 | if (just_symbols) |
1308 | { | |
d491d34e | 1309 | memcpy(symbuf, p, sym_size); |
88dd47ac | 1310 | elfcpp::Sym_write<size, big_endian> sw(symbuf); |
9590bf25 CC |
1311 | if (orig_st_shndx != elfcpp::SHN_UNDEF |
1312 | && is_ordinary | |
1313 | && relobj->e_type() == elfcpp::ET_REL) | |
88dd47ac | 1314 | { |
9590bf25 CC |
1315 | // Symbol values in relocatable object files are section |
1316 | // relative. This is normally what we want, but since here | |
1317 | // we are converting the symbol to absolute we need to add | |
1318 | // the section address. The section address in an object | |
88dd47ac ILT |
1319 | // file is normally zero, but people can use a linker |
1320 | // script to change it. | |
d491d34e ILT |
1321 | sw.put_st_value(sym.get_st_value() |
1322 | + relobj->section_address(orig_st_shndx)); | |
88dd47ac | 1323 | } |
d491d34e ILT |
1324 | st_shndx = elfcpp::SHN_ABS; |
1325 | is_ordinary = false; | |
88dd47ac ILT |
1326 | psym = &sym2; |
1327 | } | |
1328 | ||
65514900 | 1329 | // Fix up visibility if object has no-export set. |
1c74fab0 ILT |
1330 | if (relobj->no_export() |
1331 | && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary)) | |
65514900 CC |
1332 | { |
1333 | // We may have copied symbol already above. | |
1334 | if (psym != &sym2) | |
1335 | { | |
1336 | memcpy(symbuf, p, sym_size); | |
1337 | psym = &sym2; | |
1338 | } | |
1339 | ||
1340 | elfcpp::STV visibility = sym2.get_st_visibility(); | |
1341 | if (visibility == elfcpp::STV_DEFAULT | |
1342 | || visibility == elfcpp::STV_PROTECTED) | |
1343 | { | |
1344 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
1345 | unsigned char nonvis = sym2.get_st_nonvis(); | |
1346 | sw.put_st_other(elfcpp::STV_HIDDEN, nonvis); | |
1347 | } | |
1348 | } | |
1349 | ||
057ead22 | 1350 | Stringpool::Key name_key; |
2ea97941 | 1351 | name = this->namepool_.add_with_length(name, namelen, true, |
057ead22 ILT |
1352 | &name_key); |
1353 | ||
aeddab66 | 1354 | Sized_symbol<size>* res; |
2ea97941 | 1355 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
8781f709 ILT |
1356 | is_default_version, *psym, st_shndx, |
1357 | is_ordinary, orig_st_shndx); | |
2c00092d JC |
1358 | |
1359 | if (res == NULL) | |
1360 | continue; | |
6d03d481 | 1361 | |
804eb480 ST |
1362 | if (is_forced_local) |
1363 | this->force_local(res); | |
1364 | ||
7257cc92 ST |
1365 | // Do not treat this symbol as garbage if this symbol will be |
1366 | // exported to the dynamic symbol table. This is true when | |
1367 | // building a shared library or using --export-dynamic and | |
1368 | // the symbol is externally visible. | |
1369 | if (parameters->options().gc_sections() | |
1370 | && res->is_externally_visible() | |
1371 | && !res->is_from_dynobj() | |
1372 | && (parameters->options().shared() | |
fd834e57 CC |
1373 | || parameters->options().export_dynamic() |
1374 | || parameters->options().in_dynamic_list(res->name()))) | |
7257cc92 | 1375 | this->gc_mark_symbol(res); |
f0641a0b | 1376 | |
880cd20d ILT |
1377 | if (is_defined_in_discarded_section) |
1378 | res->set_is_defined_in_discarded_section(); | |
1379 | ||
730cdc88 | 1380 | (*sympointers)[i] = res; |
14bfc3f5 ILT |
1381 | } |
1382 | } | |
1383 | ||
89fc3421 CC |
1384 | // Add a symbol from a plugin-claimed file. |
1385 | ||
1386 | template<int size, bool big_endian> | |
1387 | Symbol* | |
1388 | Symbol_table::add_from_pluginobj( | |
1389 | Sized_pluginobj<size, big_endian>* obj, | |
2ea97941 | 1390 | const char* name, |
89fc3421 CC |
1391 | const char* ver, |
1392 | elfcpp::Sym<size, big_endian>* sym) | |
1393 | { | |
1394 | unsigned int st_shndx = sym->get_st_shndx(); | |
24998053 | 1395 | bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE; |
89fc3421 CC |
1396 | |
1397 | Stringpool::Key ver_key = 0; | |
8781f709 ILT |
1398 | bool is_default_version = false; |
1399 | bool is_forced_local = false; | |
89fc3421 CC |
1400 | |
1401 | if (ver != NULL) | |
1402 | { | |
1403 | ver = this->namepool_.add(ver, true, &ver_key); | |
1404 | } | |
1405 | // We don't want to assign a version to an undefined symbol, | |
1406 | // even if it is listed in the version script. FIXME: What | |
1407 | // about a common symbol? | |
1408 | else | |
1409 | { | |
1410 | if (!this->version_script_.empty() | |
1411 | && st_shndx != elfcpp::SHN_UNDEF) | |
1412 | { | |
1413 | // The symbol name did not have a version, but the | |
1414 | // version script may assign a version anyway. | |
2ea97941 | 1415 | std::string version; |
98e090bd ILT |
1416 | bool is_global; |
1417 | if (this->version_script_.get_symbol_version(name, &version, | |
1418 | &is_global)) | |
89fc3421 | 1419 | { |
98e090bd ILT |
1420 | if (!is_global) |
1421 | is_forced_local = true; | |
1422 | else if (!version.empty()) | |
89fc3421 | 1423 | { |
2ea97941 ILT |
1424 | ver = this->namepool_.add_with_length(version.c_str(), |
1425 | version.length(), | |
89fc3421 CC |
1426 | true, |
1427 | &ver_key); | |
8781f709 | 1428 | is_default_version = true; |
89fc3421 CC |
1429 | } |
1430 | } | |
89fc3421 CC |
1431 | } |
1432 | } | |
1433 | ||
1434 | Stringpool::Key name_key; | |
2ea97941 | 1435 | name = this->namepool_.add(name, true, &name_key); |
89fc3421 CC |
1436 | |
1437 | Sized_symbol<size>* res; | |
2ea97941 | 1438 | res = this->add_from_object(obj, name, name_key, ver, ver_key, |
8781f709 ILT |
1439 | is_default_version, *sym, st_shndx, |
1440 | is_ordinary, st_shndx); | |
89fc3421 | 1441 | |
2c00092d JC |
1442 | if (res == NULL) |
1443 | return NULL; | |
1444 | ||
8781f709 | 1445 | if (is_forced_local) |
0602e05a | 1446 | this->force_local(res); |
89fc3421 CC |
1447 | |
1448 | return res; | |
1449 | } | |
1450 | ||
dbe717ef ILT |
1451 | // Add all the symbols in a dynamic object to the hash table. |
1452 | ||
1453 | template<int size, bool big_endian> | |
1454 | void | |
1455 | Symbol_table::add_from_dynobj( | |
1456 | Sized_dynobj<size, big_endian>* dynobj, | |
1457 | const unsigned char* syms, | |
1458 | size_t count, | |
1459 | const char* sym_names, | |
1460 | size_t sym_name_size, | |
1461 | const unsigned char* versym, | |
1462 | size_t versym_size, | |
92de84a6 | 1463 | const std::vector<const char*>* version_map, |
6fa2a40b | 1464 | typename Sized_relobj_file<size, big_endian>::Symbols* sympointers, |
92de84a6 | 1465 | size_t* defined) |
dbe717ef | 1466 | { |
92de84a6 ILT |
1467 | *defined = 0; |
1468 | ||
8851ecca | 1469 | gold_assert(size == parameters->target().get_size()); |
dbe717ef | 1470 | |
88dd47ac ILT |
1471 | if (dynobj->just_symbols()) |
1472 | { | |
1473 | gold_error(_("--just-symbols does not make sense with a shared object")); | |
1474 | return; | |
1475 | } | |
1476 | ||
a7dac153 CC |
1477 | // FIXME: For incremental links, we don't store version information, |
1478 | // so we need to ignore version symbols for now. | |
1479 | if (parameters->incremental_update()) | |
1480 | versym = NULL; | |
1481 | ||
dbe717ef ILT |
1482 | if (versym != NULL && versym_size / 2 < count) |
1483 | { | |
75f2446e ILT |
1484 | dynobj->error(_("too few symbol versions")); |
1485 | return; | |
dbe717ef ILT |
1486 | } |
1487 | ||
1488 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1489 | ||
aeddab66 ILT |
1490 | // We keep a list of all STT_OBJECT symbols, so that we can resolve |
1491 | // weak aliases. This is necessary because if the dynamic object | |
1492 | // provides the same variable under two names, one of which is a | |
1493 | // weak definition, and the regular object refers to the weak | |
1494 | // definition, we have to put both the weak definition and the | |
1495 | // strong definition into the dynamic symbol table. Given a weak | |
1496 | // definition, the only way that we can find the corresponding | |
1497 | // strong definition, if any, is to search the symbol table. | |
1498 | std::vector<Sized_symbol<size>*> object_symbols; | |
1499 | ||
dbe717ef ILT |
1500 | const unsigned char* p = syms; |
1501 | const unsigned char* vs = versym; | |
1502 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) | |
1503 | { | |
1504 | elfcpp::Sym<size, big_endian> sym(p); | |
1505 | ||
92de84a6 ILT |
1506 | if (sympointers != NULL) |
1507 | (*sympointers)[i] = NULL; | |
1508 | ||
65778909 ILT |
1509 | // Ignore symbols with local binding or that have |
1510 | // internal or hidden visibility. | |
1511 | if (sym.get_st_bind() == elfcpp::STB_LOCAL | |
1512 | || sym.get_st_visibility() == elfcpp::STV_INTERNAL | |
1513 | || sym.get_st_visibility() == elfcpp::STV_HIDDEN) | |
dbe717ef ILT |
1514 | continue; |
1515 | ||
8bdcdf2c ILT |
1516 | // A protected symbol in a shared library must be treated as a |
1517 | // normal symbol when viewed from outside the shared library. | |
1518 | // Implement this by overriding the visibility here. | |
3d4fde69 CC |
1519 | // Likewise, an IFUNC symbol in a shared library must be treated |
1520 | // as a normal FUNC symbol. | |
8bdcdf2c ILT |
1521 | elfcpp::Sym<size, big_endian>* psym = &sym; |
1522 | unsigned char symbuf[sym_size]; | |
1523 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
3d4fde69 CC |
1524 | if (sym.get_st_visibility() == elfcpp::STV_PROTECTED |
1525 | || sym.get_st_type() == elfcpp::STT_GNU_IFUNC) | |
8bdcdf2c ILT |
1526 | { |
1527 | memcpy(symbuf, p, sym_size); | |
1528 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
3d4fde69 CC |
1529 | if (sym.get_st_visibility() == elfcpp::STV_PROTECTED) |
1530 | sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis()); | |
1531 | if (sym.get_st_type() == elfcpp::STT_GNU_IFUNC) | |
1532 | sw.put_st_info(sym.get_st_bind(), elfcpp::STT_FUNC); | |
8bdcdf2c ILT |
1533 | psym = &sym2; |
1534 | } | |
1535 | ||
1536 | unsigned int st_name = psym->get_st_name(); | |
dbe717ef ILT |
1537 | if (st_name >= sym_name_size) |
1538 | { | |
75f2446e ILT |
1539 | dynobj->error(_("bad symbol name offset %u at %zu"), |
1540 | st_name, i); | |
1541 | continue; | |
dbe717ef ILT |
1542 | } |
1543 | ||
2ea97941 | 1544 | const char* name = sym_names + st_name; |
dbe717ef | 1545 | |
d491d34e | 1546 | bool is_ordinary; |
8bdcdf2c | 1547 | unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(), |
d491d34e ILT |
1548 | &is_ordinary); |
1549 | ||
92de84a6 ILT |
1550 | if (st_shndx != elfcpp::SHN_UNDEF) |
1551 | ++*defined; | |
1552 | ||
aeddab66 ILT |
1553 | Sized_symbol<size>* res; |
1554 | ||
dbe717ef ILT |
1555 | if (versym == NULL) |
1556 | { | |
1557 | Stringpool::Key name_key; | |
2ea97941 ILT |
1558 | name = this->namepool_.add(name, true, &name_key); |
1559 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, | |
8bdcdf2c | 1560 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1561 | st_shndx); |
dbe717ef | 1562 | } |
aeddab66 ILT |
1563 | else |
1564 | { | |
1565 | // Read the version information. | |
dbe717ef | 1566 | |
aeddab66 | 1567 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); |
dbe717ef | 1568 | |
aeddab66 ILT |
1569 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; |
1570 | v &= elfcpp::VERSYM_VERSION; | |
dbe717ef | 1571 | |
aeddab66 ILT |
1572 | // The Sun documentation says that V can be VER_NDX_LOCAL, |
1573 | // or VER_NDX_GLOBAL, or a version index. The meaning of | |
1574 | // VER_NDX_LOCAL is defined as "Symbol has local scope." | |
1575 | // The old GNU linker will happily generate VER_NDX_LOCAL | |
1576 | // for an undefined symbol. I don't know what the Sun | |
1577 | // linker will generate. | |
dbe717ef | 1578 | |
aeddab66 | 1579 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
d491d34e | 1580 | && st_shndx != elfcpp::SHN_UNDEF) |
aeddab66 ILT |
1581 | { |
1582 | // This symbol should not be visible outside the object. | |
1583 | continue; | |
1584 | } | |
64707334 | 1585 | |
aeddab66 ILT |
1586 | // At this point we are definitely going to add this symbol. |
1587 | Stringpool::Key name_key; | |
2ea97941 | 1588 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef | 1589 | |
aeddab66 ILT |
1590 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
1591 | || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) | |
1592 | { | |
1593 | // This symbol does not have a version. | |
2ea97941 | 1594 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
8bdcdf2c | 1595 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1596 | st_shndx); |
aeddab66 ILT |
1597 | } |
1598 | else | |
1599 | { | |
1600 | if (v >= version_map->size()) | |
1601 | { | |
1602 | dynobj->error(_("versym for symbol %zu out of range: %u"), | |
1603 | i, v); | |
1604 | continue; | |
1605 | } | |
dbe717ef | 1606 | |
2ea97941 ILT |
1607 | const char* version = (*version_map)[v]; |
1608 | if (version == NULL) | |
aeddab66 ILT |
1609 | { |
1610 | dynobj->error(_("versym for symbol %zu has no name: %u"), | |
1611 | i, v); | |
1612 | continue; | |
1613 | } | |
dbe717ef | 1614 | |
aeddab66 | 1615 | Stringpool::Key version_key; |
2ea97941 | 1616 | version = this->namepool_.add(version, true, &version_key); |
aeddab66 ILT |
1617 | |
1618 | // If this is an absolute symbol, and the version name | |
1619 | // and symbol name are the same, then this is the | |
1620 | // version definition symbol. These symbols exist to | |
1621 | // support using -u to pull in particular versions. We | |
1622 | // do not want to record a version for them. | |
d491d34e ILT |
1623 | if (st_shndx == elfcpp::SHN_ABS |
1624 | && !is_ordinary | |
aeddab66 | 1625 | && name_key == version_key) |
2ea97941 | 1626 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
8bdcdf2c | 1627 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1628 | st_shndx); |
aeddab66 ILT |
1629 | else |
1630 | { | |
8781f709 ILT |
1631 | const bool is_default_version = |
1632 | !hidden && st_shndx != elfcpp::SHN_UNDEF; | |
2ea97941 | 1633 | res = this->add_from_object(dynobj, name, name_key, version, |
8781f709 ILT |
1634 | version_key, is_default_version, |
1635 | *psym, st_shndx, | |
d491d34e | 1636 | is_ordinary, st_shndx); |
aeddab66 ILT |
1637 | } |
1638 | } | |
dbe717ef ILT |
1639 | } |
1640 | ||
2c00092d JC |
1641 | if (res == NULL) |
1642 | continue; | |
1643 | ||
99a37bfd | 1644 | // Note that it is possible that RES was overridden by an |
a4bb589a | 1645 | // earlier object, in which case it can't be aliased here. |
d491d34e ILT |
1646 | if (st_shndx != elfcpp::SHN_UNDEF |
1647 | && is_ordinary | |
8bdcdf2c | 1648 | && psym->get_st_type() == elfcpp::STT_OBJECT |
99a37bfd ILT |
1649 | && res->source() == Symbol::FROM_OBJECT |
1650 | && res->object() == dynobj) | |
aeddab66 | 1651 | object_symbols.push_back(res); |
92de84a6 | 1652 | |
6eeb0170 CC |
1653 | // If the symbol has protected visibility in the dynobj, |
1654 | // mark it as such if it was not overridden. | |
1655 | if (res->source() == Symbol::FROM_OBJECT | |
1656 | && res->object() == dynobj | |
1657 | && sym.get_st_visibility() == elfcpp::STV_PROTECTED) | |
1658 | res->set_is_protected(); | |
1659 | ||
92de84a6 ILT |
1660 | if (sympointers != NULL) |
1661 | (*sympointers)[i] = res; | |
aeddab66 ILT |
1662 | } |
1663 | ||
1664 | this->record_weak_aliases(&object_symbols); | |
1665 | } | |
1666 | ||
cdc29364 CC |
1667 | // Add a symbol from a incremental object file. |
1668 | ||
1669 | template<int size, bool big_endian> | |
26d3c67d | 1670 | Sized_symbol<size>* |
cdc29364 CC |
1671 | Symbol_table::add_from_incrobj( |
1672 | Object* obj, | |
1673 | const char* name, | |
1674 | const char* ver, | |
1675 | elfcpp::Sym<size, big_endian>* sym) | |
1676 | { | |
1677 | unsigned int st_shndx = sym->get_st_shndx(); | |
1678 | bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE; | |
1679 | ||
1680 | Stringpool::Key ver_key = 0; | |
1681 | bool is_default_version = false; | |
cdc29364 CC |
1682 | |
1683 | Stringpool::Key name_key; | |
1684 | name = this->namepool_.add(name, true, &name_key); | |
1685 | ||
1686 | Sized_symbol<size>* res; | |
1687 | res = this->add_from_object(obj, name, name_key, ver, ver_key, | |
1688 | is_default_version, *sym, st_shndx, | |
1689 | is_ordinary, st_shndx); | |
1690 | ||
cdc29364 CC |
1691 | return res; |
1692 | } | |
1693 | ||
aeddab66 ILT |
1694 | // This is used to sort weak aliases. We sort them first by section |
1695 | // index, then by offset, then by weak ahead of strong. | |
1696 | ||
1697 | template<int size> | |
1698 | class Weak_alias_sorter | |
1699 | { | |
1700 | public: | |
1701 | bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const; | |
1702 | }; | |
1703 | ||
1704 | template<int size> | |
1705 | bool | |
1706 | Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1, | |
1707 | const Sized_symbol<size>* s2) const | |
1708 | { | |
d491d34e ILT |
1709 | bool is_ordinary; |
1710 | unsigned int s1_shndx = s1->shndx(&is_ordinary); | |
1711 | gold_assert(is_ordinary); | |
1712 | unsigned int s2_shndx = s2->shndx(&is_ordinary); | |
1713 | gold_assert(is_ordinary); | |
1714 | if (s1_shndx != s2_shndx) | |
1715 | return s1_shndx < s2_shndx; | |
1716 | ||
aeddab66 ILT |
1717 | if (s1->value() != s2->value()) |
1718 | return s1->value() < s2->value(); | |
1719 | if (s1->binding() != s2->binding()) | |
1720 | { | |
1721 | if (s1->binding() == elfcpp::STB_WEAK) | |
1722 | return true; | |
1723 | if (s2->binding() == elfcpp::STB_WEAK) | |
1724 | return false; | |
1725 | } | |
1726 | return std::string(s1->name()) < std::string(s2->name()); | |
1727 | } | |
dbe717ef | 1728 | |
aeddab66 ILT |
1729 | // SYMBOLS is a list of object symbols from a dynamic object. Look |
1730 | // for any weak aliases, and record them so that if we add the weak | |
1731 | // alias to the dynamic symbol table, we also add the corresponding | |
1732 | // strong symbol. | |
dbe717ef | 1733 | |
aeddab66 ILT |
1734 | template<int size> |
1735 | void | |
1736 | Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols) | |
1737 | { | |
1738 | // Sort the vector by section index, then by offset, then by weak | |
1739 | // ahead of strong. | |
1740 | std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>()); | |
1741 | ||
1742 | // Walk through the vector. For each weak definition, record | |
1743 | // aliases. | |
1744 | for (typename std::vector<Sized_symbol<size>*>::const_iterator p = | |
1745 | symbols->begin(); | |
1746 | p != symbols->end(); | |
1747 | ++p) | |
1748 | { | |
1749 | if ((*p)->binding() != elfcpp::STB_WEAK) | |
1750 | continue; | |
1751 | ||
1752 | // Build a circular list of weak aliases. Each symbol points to | |
1753 | // the next one in the circular list. | |
1754 | ||
1755 | Sized_symbol<size>* from_sym = *p; | |
1756 | typename std::vector<Sized_symbol<size>*>::const_iterator q; | |
1757 | for (q = p + 1; q != symbols->end(); ++q) | |
dbe717ef | 1758 | { |
d491d34e ILT |
1759 | bool dummy; |
1760 | if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy) | |
aeddab66 ILT |
1761 | || (*q)->value() != from_sym->value()) |
1762 | break; | |
1763 | ||
1764 | this->weak_aliases_[from_sym] = *q; | |
1765 | from_sym->set_has_alias(); | |
1766 | from_sym = *q; | |
dbe717ef ILT |
1767 | } |
1768 | ||
aeddab66 ILT |
1769 | if (from_sym != *p) |
1770 | { | |
1771 | this->weak_aliases_[from_sym] = *p; | |
1772 | from_sym->set_has_alias(); | |
1773 | } | |
dbe717ef | 1774 | |
aeddab66 | 1775 | p = q - 1; |
dbe717ef ILT |
1776 | } |
1777 | } | |
1778 | ||
ead1e424 ILT |
1779 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
1780 | // true, then only create the symbol if there is a reference to it. | |
86f2e683 | 1781 | // If this does not return NULL, it sets *POLDSYM to the existing |
8c500701 ILT |
1782 | // symbol if there is one. This sets *RESOLVE_OLDSYM if we should |
1783 | // resolve the newly created symbol to the old one. This | |
1784 | // canonicalizes *PNAME and *PVERSION. | |
ead1e424 ILT |
1785 | |
1786 | template<int size, bool big_endian> | |
1787 | Sized_symbol<size>* | |
9b07f471 ILT |
1788 | Symbol_table::define_special_symbol(const char** pname, const char** pversion, |
1789 | bool only_if_ref, | |
dc8d2d90 | 1790 | elfcpp::STV visibility, |
8c500701 | 1791 | Sized_symbol<size>** poldsym, |
40d7d93f | 1792 | bool* resolve_oldsym, bool is_forced_local) |
ead1e424 | 1793 | { |
8c500701 | 1794 | *resolve_oldsym = false; |
8cc69fb6 | 1795 | *poldsym = NULL; |
ead1e424 | 1796 | |
55a93433 ILT |
1797 | // If the caller didn't give us a version, see if we get one from |
1798 | // the version script. | |
057ead22 | 1799 | std::string v; |
8c500701 | 1800 | bool is_default_version = false; |
40d7d93f | 1801 | if (!is_forced_local && *pversion == NULL) |
55a93433 | 1802 | { |
98e090bd ILT |
1803 | bool is_global; |
1804 | if (this->version_script_.get_symbol_version(*pname, &v, &is_global)) | |
057ead22 | 1805 | { |
98e090bd ILT |
1806 | if (is_global && !v.empty()) |
1807 | { | |
1808 | *pversion = v.c_str(); | |
1809 | // If we get the version from a version script, then we | |
1810 | // are also the default version. | |
1811 | is_default_version = true; | |
1812 | } | |
057ead22 | 1813 | } |
55a93433 ILT |
1814 | } |
1815 | ||
8c500701 ILT |
1816 | Symbol* oldsym; |
1817 | Sized_symbol<size>* sym; | |
1818 | ||
1819 | bool add_to_table = false; | |
1820 | typename Symbol_table_type::iterator add_loc = this->table_.end(); | |
1821 | bool add_def_to_table = false; | |
1822 | typename Symbol_table_type::iterator add_def_loc = this->table_.end(); | |
1823 | ||
ead1e424 ILT |
1824 | if (only_if_ref) |
1825 | { | |
306d9ef0 | 1826 | oldsym = this->lookup(*pname, *pversion); |
8c500701 ILT |
1827 | if (oldsym == NULL && is_default_version) |
1828 | oldsym = this->lookup(*pname, NULL); | |
dc8d2d90 | 1829 | if (oldsym == NULL) |
ead1e424 | 1830 | return NULL; |
dc8d2d90 L |
1831 | if (!oldsym->is_undefined()) |
1832 | { | |
1833 | // Skip if the old definition is from a regular object. | |
1834 | if (!oldsym->is_from_dynobj()) | |
1835 | return NULL; | |
1836 | ||
1837 | // If the symbol has hidden or internal visibility, ignore | |
1838 | // definition and reference from a dynamic object. | |
1839 | if ((visibility == elfcpp::STV_HIDDEN | |
1840 | || visibility == elfcpp::STV_INTERNAL) | |
1841 | && !oldsym->in_reg()) | |
1842 | return NULL; | |
1843 | } | |
306d9ef0 ILT |
1844 | |
1845 | *pname = oldsym->name(); | |
eebd87a5 ILT |
1846 | if (is_default_version) |
1847 | *pversion = this->namepool_.add(*pversion, true, NULL); | |
1848 | else | |
8c500701 | 1849 | *pversion = oldsym->version(); |
ead1e424 ILT |
1850 | } |
1851 | else | |
1852 | { | |
14b31740 | 1853 | // Canonicalize NAME and VERSION. |
f0641a0b | 1854 | Stringpool::Key name_key; |
cfd73a4e | 1855 | *pname = this->namepool_.add(*pname, true, &name_key); |
ead1e424 | 1856 | |
14b31740 | 1857 | Stringpool::Key version_key = 0; |
306d9ef0 | 1858 | if (*pversion != NULL) |
cfd73a4e | 1859 | *pversion = this->namepool_.add(*pversion, true, &version_key); |
14b31740 | 1860 | |
ead1e424 | 1861 | Symbol* const snull = NULL; |
ead1e424 | 1862 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
14b31740 ILT |
1863 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
1864 | version_key), | |
ead1e424 ILT |
1865 | snull)); |
1866 | ||
8781f709 | 1867 | std::pair<typename Symbol_table_type::iterator, bool> insdefault = |
8c500701 ILT |
1868 | std::make_pair(this->table_.end(), false); |
1869 | if (is_default_version) | |
1870 | { | |
1871 | const Stringpool::Key vnull = 0; | |
8781f709 ILT |
1872 | insdefault = |
1873 | this->table_.insert(std::make_pair(std::make_pair(name_key, | |
1874 | vnull), | |
1875 | snull)); | |
8c500701 ILT |
1876 | } |
1877 | ||
ead1e424 ILT |
1878 | if (!ins.second) |
1879 | { | |
14b31740 | 1880 | // We already have a symbol table entry for NAME/VERSION. |
ead1e424 | 1881 | oldsym = ins.first->second; |
a3ad94ed | 1882 | gold_assert(oldsym != NULL); |
8c500701 ILT |
1883 | |
1884 | if (is_default_version) | |
1885 | { | |
1886 | Sized_symbol<size>* soldsym = | |
1887 | this->get_sized_symbol<size>(oldsym); | |
1888 | this->define_default_version<size, big_endian>(soldsym, | |
8781f709 ILT |
1889 | insdefault.second, |
1890 | insdefault.first); | |
8c500701 | 1891 | } |
ead1e424 ILT |
1892 | } |
1893 | else | |
1894 | { | |
1895 | // We haven't seen this symbol before. | |
a3ad94ed | 1896 | gold_assert(ins.first->second == NULL); |
8c500701 ILT |
1897 | |
1898 | add_to_table = true; | |
1899 | add_loc = ins.first; | |
1900 | ||
1b115e8e CC |
1901 | if (is_default_version |
1902 | && !insdefault.second | |
1903 | && insdefault.first->second->version() == NULL) | |
8c500701 ILT |
1904 | { |
1905 | // We are adding NAME/VERSION, and it is the default | |
1b115e8e CC |
1906 | // version. We already have an entry for NAME/NULL |
1907 | // that does not already have a version. | |
8781f709 | 1908 | oldsym = insdefault.first->second; |
8c500701 ILT |
1909 | *resolve_oldsym = true; |
1910 | } | |
1911 | else | |
1912 | { | |
1913 | oldsym = NULL; | |
1914 | ||
1915 | if (is_default_version) | |
1916 | { | |
1917 | add_def_to_table = true; | |
8781f709 | 1918 | add_def_loc = insdefault.first; |
8c500701 ILT |
1919 | } |
1920 | } | |
ead1e424 ILT |
1921 | } |
1922 | } | |
1923 | ||
8851ecca ILT |
1924 | const Target& target = parameters->target(); |
1925 | if (!target.has_make_symbol()) | |
86f2e683 ILT |
1926 | sym = new Sized_symbol<size>(); |
1927 | else | |
ead1e424 | 1928 | { |
029ba973 ILT |
1929 | Sized_target<size, big_endian>* sized_target = |
1930 | parameters->sized_target<size, big_endian>(); | |
dc1c8a16 CC |
1931 | sym = sized_target->make_symbol(*pname, elfcpp::STT_NOTYPE, |
1932 | NULL, elfcpp::SHN_UNDEF, 0); | |
86f2e683 ILT |
1933 | if (sym == NULL) |
1934 | return NULL; | |
1935 | } | |
ead1e424 | 1936 | |
86f2e683 ILT |
1937 | if (add_to_table) |
1938 | add_loc->second = sym; | |
1939 | else | |
1940 | gold_assert(oldsym != NULL); | |
ead1e424 | 1941 | |
8c500701 ILT |
1942 | if (add_def_to_table) |
1943 | add_def_loc->second = sym; | |
1944 | ||
7d1a9ebb | 1945 | *poldsym = this->get_sized_symbol<size>(oldsym); |
ead1e424 ILT |
1946 | |
1947 | return sym; | |
1948 | } | |
1949 | ||
1950 | // Define a symbol based on an Output_data. | |
1951 | ||
14b31740 | 1952 | Symbol* |
2ea97941 ILT |
1953 | Symbol_table::define_in_output_data(const char* name, |
1954 | const char* version, | |
99fff23b | 1955 | Defined defined, |
9b07f471 | 1956 | Output_data* od, |
2ea97941 ILT |
1957 | uint64_t value, |
1958 | uint64_t symsize, | |
9b07f471 ILT |
1959 | elfcpp::STT type, |
1960 | elfcpp::STB binding, | |
ead1e424 ILT |
1961 | elfcpp::STV visibility, |
1962 | unsigned char nonvis, | |
2ea97941 | 1963 | bool offset_is_from_end, |
ead1e424 ILT |
1964 | bool only_if_ref) |
1965 | { | |
8851ecca | 1966 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
1967 | { |
1968 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 1969 | return this->do_define_in_output_data<32>(name, version, defined, od, |
2ea97941 | 1970 | value, symsize, type, binding, |
86f2e683 | 1971 | visibility, nonvis, |
2ea97941 | 1972 | offset_is_from_end, |
86f2e683 ILT |
1973 | only_if_ref); |
1974 | #else | |
1975 | gold_unreachable(); | |
1976 | #endif | |
1977 | } | |
8851ecca | 1978 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
1979 | { |
1980 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 1981 | return this->do_define_in_output_data<64>(name, version, defined, od, |
2ea97941 | 1982 | value, symsize, type, binding, |
86f2e683 | 1983 | visibility, nonvis, |
2ea97941 | 1984 | offset_is_from_end, |
86f2e683 ILT |
1985 | only_if_ref); |
1986 | #else | |
1987 | gold_unreachable(); | |
1988 | #endif | |
1989 | } | |
ead1e424 | 1990 | else |
a3ad94ed | 1991 | gold_unreachable(); |
ead1e424 ILT |
1992 | } |
1993 | ||
1994 | // Define a symbol in an Output_data, sized version. | |
1995 | ||
1996 | template<int size> | |
14b31740 | 1997 | Sized_symbol<size>* |
ead1e424 | 1998 | Symbol_table::do_define_in_output_data( |
2ea97941 ILT |
1999 | const char* name, |
2000 | const char* version, | |
99fff23b | 2001 | Defined defined, |
ead1e424 | 2002 | Output_data* od, |
2ea97941 ILT |
2003 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2004 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
2005 | elfcpp::STT type, |
2006 | elfcpp::STB binding, | |
2007 | elfcpp::STV visibility, | |
2008 | unsigned char nonvis, | |
2ea97941 | 2009 | bool offset_is_from_end, |
ead1e424 ILT |
2010 | bool only_if_ref) |
2011 | { | |
2012 | Sized_symbol<size>* sym; | |
86f2e683 | 2013 | Sized_symbol<size>* oldsym; |
8c500701 | 2014 | bool resolve_oldsym; |
40d7d93f | 2015 | const bool is_forced_local = binding == elfcpp::STB_LOCAL; |
ead1e424 | 2016 | |
8851ecca | 2017 | if (parameters->target().is_big_endian()) |
193a53d9 ILT |
2018 | { |
2019 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 2020 | sym = this->define_special_symbol<size, true>(&name, &version, |
dc8d2d90 L |
2021 | only_if_ref, |
2022 | visibility, | |
2023 | &oldsym, | |
40d7d93f CC |
2024 | &resolve_oldsym, |
2025 | is_forced_local); | |
193a53d9 ILT |
2026 | #else |
2027 | gold_unreachable(); | |
2028 | #endif | |
2029 | } | |
ead1e424 | 2030 | else |
193a53d9 ILT |
2031 | { |
2032 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 2033 | sym = this->define_special_symbol<size, false>(&name, &version, |
dc8d2d90 L |
2034 | only_if_ref, |
2035 | visibility, | |
2036 | &oldsym, | |
40d7d93f CC |
2037 | &resolve_oldsym, |
2038 | is_forced_local); | |
193a53d9 ILT |
2039 | #else |
2040 | gold_unreachable(); | |
2041 | #endif | |
2042 | } | |
ead1e424 ILT |
2043 | |
2044 | if (sym == NULL) | |
14b31740 | 2045 | return NULL; |
ead1e424 | 2046 | |
2ea97941 | 2047 | sym->init_output_data(name, version, od, value, symsize, type, binding, |
5146f448 CC |
2048 | visibility, nonvis, offset_is_from_end, |
2049 | defined == PREDEFINED); | |
14b31740 | 2050 | |
e5756efb | 2051 | if (oldsym == NULL) |
55a93433 | 2052 | { |
40d7d93f | 2053 | if (is_forced_local || this->version_script_.symbol_is_local(name)) |
55a93433 | 2054 | this->force_local(sym); |
2ea97941 | 2055 | else if (version != NULL) |
75517b77 | 2056 | sym->set_is_default(); |
55a93433 ILT |
2057 | return sym; |
2058 | } | |
86f2e683 | 2059 | |
62855347 | 2060 | if (Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 2061 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2062 | |
2063 | if (resolve_oldsym) | |
2064 | return sym; | |
2065 | else | |
2066 | { | |
db1ff028 | 2067 | if (defined == PREDEFINED |
40d7d93f | 2068 | && (is_forced_local || this->version_script_.symbol_is_local(name))) |
5417c94d | 2069 | this->force_local(oldsym); |
8c500701 ILT |
2070 | delete sym; |
2071 | return oldsym; | |
2072 | } | |
ead1e424 ILT |
2073 | } |
2074 | ||
2075 | // Define a symbol based on an Output_segment. | |
2076 | ||
14b31740 | 2077 | Symbol* |
2ea97941 | 2078 | Symbol_table::define_in_output_segment(const char* name, |
99fff23b ILT |
2079 | const char* version, |
2080 | Defined defined, | |
2081 | Output_segment* os, | |
2ea97941 ILT |
2082 | uint64_t value, |
2083 | uint64_t symsize, | |
9b07f471 ILT |
2084 | elfcpp::STT type, |
2085 | elfcpp::STB binding, | |
ead1e424 ILT |
2086 | elfcpp::STV visibility, |
2087 | unsigned char nonvis, | |
2ea97941 | 2088 | Symbol::Segment_offset_base offset_base, |
ead1e424 ILT |
2089 | bool only_if_ref) |
2090 | { | |
8851ecca | 2091 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
2092 | { |
2093 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 2094 | return this->do_define_in_output_segment<32>(name, version, defined, os, |
2ea97941 | 2095 | value, symsize, type, |
86f2e683 | 2096 | binding, visibility, nonvis, |
2ea97941 | 2097 | offset_base, only_if_ref); |
86f2e683 ILT |
2098 | #else |
2099 | gold_unreachable(); | |
2100 | #endif | |
2101 | } | |
8851ecca | 2102 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
2103 | { |
2104 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 2105 | return this->do_define_in_output_segment<64>(name, version, defined, os, |
2ea97941 | 2106 | value, symsize, type, |
86f2e683 | 2107 | binding, visibility, nonvis, |
2ea97941 | 2108 | offset_base, only_if_ref); |
86f2e683 ILT |
2109 | #else |
2110 | gold_unreachable(); | |
2111 | #endif | |
2112 | } | |
ead1e424 | 2113 | else |
a3ad94ed | 2114 | gold_unreachable(); |
ead1e424 ILT |
2115 | } |
2116 | ||
2117 | // Define a symbol in an Output_segment, sized version. | |
2118 | ||
2119 | template<int size> | |
14b31740 | 2120 | Sized_symbol<size>* |
ead1e424 | 2121 | Symbol_table::do_define_in_output_segment( |
2ea97941 ILT |
2122 | const char* name, |
2123 | const char* version, | |
99fff23b | 2124 | Defined defined, |
ead1e424 | 2125 | Output_segment* os, |
2ea97941 ILT |
2126 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2127 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
2128 | elfcpp::STT type, |
2129 | elfcpp::STB binding, | |
2130 | elfcpp::STV visibility, | |
2131 | unsigned char nonvis, | |
2ea97941 | 2132 | Symbol::Segment_offset_base offset_base, |
ead1e424 ILT |
2133 | bool only_if_ref) |
2134 | { | |
2135 | Sized_symbol<size>* sym; | |
86f2e683 | 2136 | Sized_symbol<size>* oldsym; |
8c500701 | 2137 | bool resolve_oldsym; |
40d7d93f | 2138 | const bool is_forced_local = binding == elfcpp::STB_LOCAL; |
ead1e424 | 2139 | |
8851ecca | 2140 | if (parameters->target().is_big_endian()) |
9025d29d ILT |
2141 | { |
2142 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 2143 | sym = this->define_special_symbol<size, true>(&name, &version, |
dc8d2d90 L |
2144 | only_if_ref, |
2145 | visibility, | |
2146 | &oldsym, | |
40d7d93f CC |
2147 | &resolve_oldsym, |
2148 | is_forced_local); | |
9025d29d ILT |
2149 | #else |
2150 | gold_unreachable(); | |
2151 | #endif | |
2152 | } | |
ead1e424 | 2153 | else |
9025d29d ILT |
2154 | { |
2155 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 2156 | sym = this->define_special_symbol<size, false>(&name, &version, |
dc8d2d90 L |
2157 | only_if_ref, |
2158 | visibility, | |
2159 | &oldsym, | |
40d7d93f CC |
2160 | &resolve_oldsym, |
2161 | is_forced_local); | |
9025d29d ILT |
2162 | #else |
2163 | gold_unreachable(); | |
2164 | #endif | |
2165 | } | |
ead1e424 ILT |
2166 | |
2167 | if (sym == NULL) | |
14b31740 | 2168 | return NULL; |
ead1e424 | 2169 | |
2ea97941 | 2170 | sym->init_output_segment(name, version, os, value, symsize, type, binding, |
5146f448 CC |
2171 | visibility, nonvis, offset_base, |
2172 | defined == PREDEFINED); | |
14b31740 | 2173 | |
e5756efb | 2174 | if (oldsym == NULL) |
55a93433 | 2175 | { |
40d7d93f | 2176 | if (is_forced_local || this->version_script_.symbol_is_local(name)) |
55a93433 | 2177 | this->force_local(sym); |
2ea97941 | 2178 | else if (version != NULL) |
75517b77 | 2179 | sym->set_is_default(); |
55a93433 ILT |
2180 | return sym; |
2181 | } | |
86f2e683 | 2182 | |
62855347 | 2183 | if (Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 2184 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2185 | |
2186 | if (resolve_oldsym) | |
2187 | return sym; | |
2188 | else | |
2189 | { | |
40d7d93f | 2190 | if (is_forced_local || this->version_script_.symbol_is_local(name)) |
5417c94d | 2191 | this->force_local(oldsym); |
8c500701 ILT |
2192 | delete sym; |
2193 | return oldsym; | |
2194 | } | |
ead1e424 ILT |
2195 | } |
2196 | ||
2197 | // Define a special symbol with a constant value. It is a multiple | |
2198 | // definition error if this symbol is already defined. | |
2199 | ||
14b31740 | 2200 | Symbol* |
2ea97941 ILT |
2201 | Symbol_table::define_as_constant(const char* name, |
2202 | const char* version, | |
99fff23b | 2203 | Defined defined, |
2ea97941 ILT |
2204 | uint64_t value, |
2205 | uint64_t symsize, | |
9b07f471 ILT |
2206 | elfcpp::STT type, |
2207 | elfcpp::STB binding, | |
2208 | elfcpp::STV visibility, | |
2209 | unsigned char nonvis, | |
caa9d5d9 ILT |
2210 | bool only_if_ref, |
2211 | bool force_override) | |
ead1e424 | 2212 | { |
8851ecca | 2213 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
2214 | { |
2215 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 2216 | return this->do_define_as_constant<32>(name, version, defined, value, |
2ea97941 | 2217 | symsize, type, binding, |
caa9d5d9 ILT |
2218 | visibility, nonvis, only_if_ref, |
2219 | force_override); | |
86f2e683 ILT |
2220 | #else |
2221 | gold_unreachable(); | |
2222 | #endif | |
2223 | } | |
8851ecca | 2224 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
2225 | { |
2226 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 2227 | return this->do_define_as_constant<64>(name, version, defined, value, |
2ea97941 | 2228 | symsize, type, binding, |
caa9d5d9 ILT |
2229 | visibility, nonvis, only_if_ref, |
2230 | force_override); | |
86f2e683 ILT |
2231 | #else |
2232 | gold_unreachable(); | |
2233 | #endif | |
2234 | } | |
ead1e424 | 2235 | else |
a3ad94ed | 2236 | gold_unreachable(); |
ead1e424 ILT |
2237 | } |
2238 | ||
2239 | // Define a symbol as a constant, sized version. | |
2240 | ||
2241 | template<int size> | |
14b31740 | 2242 | Sized_symbol<size>* |
ead1e424 | 2243 | Symbol_table::do_define_as_constant( |
2ea97941 ILT |
2244 | const char* name, |
2245 | const char* version, | |
99fff23b | 2246 | Defined defined, |
2ea97941 ILT |
2247 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2248 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
2249 | elfcpp::STT type, |
2250 | elfcpp::STB binding, | |
2251 | elfcpp::STV visibility, | |
2252 | unsigned char nonvis, | |
caa9d5d9 ILT |
2253 | bool only_if_ref, |
2254 | bool force_override) | |
ead1e424 ILT |
2255 | { |
2256 | Sized_symbol<size>* sym; | |
86f2e683 | 2257 | Sized_symbol<size>* oldsym; |
8c500701 | 2258 | bool resolve_oldsym; |
40d7d93f | 2259 | const bool is_forced_local = binding == elfcpp::STB_LOCAL; |
ead1e424 | 2260 | |
8851ecca | 2261 | if (parameters->target().is_big_endian()) |
9025d29d ILT |
2262 | { |
2263 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 2264 | sym = this->define_special_symbol<size, true>(&name, &version, |
dc8d2d90 L |
2265 | only_if_ref, |
2266 | visibility, | |
2267 | &oldsym, | |
40d7d93f CC |
2268 | &resolve_oldsym, |
2269 | is_forced_local); | |
9025d29d ILT |
2270 | #else |
2271 | gold_unreachable(); | |
2272 | #endif | |
2273 | } | |
ead1e424 | 2274 | else |
9025d29d ILT |
2275 | { |
2276 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 2277 | sym = this->define_special_symbol<size, false>(&name, &version, |
dc8d2d90 L |
2278 | only_if_ref, |
2279 | visibility, | |
2280 | &oldsym, | |
40d7d93f CC |
2281 | &resolve_oldsym, |
2282 | is_forced_local); | |
9025d29d ILT |
2283 | #else |
2284 | gold_unreachable(); | |
2285 | #endif | |
2286 | } | |
ead1e424 ILT |
2287 | |
2288 | if (sym == NULL) | |
14b31740 | 2289 | return NULL; |
ead1e424 | 2290 | |
2ea97941 | 2291 | sym->init_constant(name, version, value, symsize, type, binding, visibility, |
5146f448 | 2292 | nonvis, defined == PREDEFINED); |
14b31740 | 2293 | |
e5756efb | 2294 | if (oldsym == NULL) |
55a93433 | 2295 | { |
686c8caf ILT |
2296 | // Version symbols are absolute symbols with name == version. |
2297 | // We don't want to force them to be local. | |
2ea97941 ILT |
2298 | if ((version == NULL |
2299 | || name != version | |
2300 | || value != 0) | |
40d7d93f | 2301 | && (is_forced_local || this->version_script_.symbol_is_local(name))) |
55a93433 | 2302 | this->force_local(sym); |
2ea97941 ILT |
2303 | else if (version != NULL |
2304 | && (name != version || value != 0)) | |
75517b77 | 2305 | sym->set_is_default(); |
55a93433 ILT |
2306 | return sym; |
2307 | } | |
86f2e683 | 2308 | |
99fff23b | 2309 | if (force_override |
62855347 | 2310 | || Symbol_table::should_override_with_special(oldsym, type, defined)) |
e5756efb | 2311 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2312 | |
2313 | if (resolve_oldsym) | |
2314 | return sym; | |
2315 | else | |
2316 | { | |
40d7d93f | 2317 | if (is_forced_local || this->version_script_.symbol_is_local(name)) |
5417c94d | 2318 | this->force_local(oldsym); |
8c500701 ILT |
2319 | delete sym; |
2320 | return oldsym; | |
2321 | } | |
ead1e424 ILT |
2322 | } |
2323 | ||
2324 | // Define a set of symbols in output sections. | |
2325 | ||
2326 | void | |
9b07f471 | 2327 | Symbol_table::define_symbols(const Layout* layout, int count, |
a445fddf ILT |
2328 | const Define_symbol_in_section* p, |
2329 | bool only_if_ref) | |
ead1e424 ILT |
2330 | { |
2331 | for (int i = 0; i < count; ++i, ++p) | |
2332 | { | |
2333 | Output_section* os = layout->find_output_section(p->output_section); | |
2334 | if (os != NULL) | |
99fff23b | 2335 | this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value, |
14b31740 ILT |
2336 | p->size, p->type, p->binding, |
2337 | p->visibility, p->nonvis, | |
a445fddf ILT |
2338 | p->offset_is_from_end, |
2339 | only_if_ref || p->only_if_ref); | |
ead1e424 | 2340 | else |
99fff23b ILT |
2341 | this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size, |
2342 | p->type, p->binding, p->visibility, p->nonvis, | |
caa9d5d9 ILT |
2343 | only_if_ref || p->only_if_ref, |
2344 | false); | |
ead1e424 ILT |
2345 | } |
2346 | } | |
2347 | ||
2348 | // Define a set of symbols in output segments. | |
2349 | ||
2350 | void | |
9b07f471 | 2351 | Symbol_table::define_symbols(const Layout* layout, int count, |
a445fddf ILT |
2352 | const Define_symbol_in_segment* p, |
2353 | bool only_if_ref) | |
ead1e424 ILT |
2354 | { |
2355 | for (int i = 0; i < count; ++i, ++p) | |
2356 | { | |
2357 | Output_segment* os = layout->find_output_segment(p->segment_type, | |
2358 | p->segment_flags_set, | |
2359 | p->segment_flags_clear); | |
2360 | if (os != NULL) | |
99fff23b | 2361 | this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value, |
14b31740 ILT |
2362 | p->size, p->type, p->binding, |
2363 | p->visibility, p->nonvis, | |
a445fddf ILT |
2364 | p->offset_base, |
2365 | only_if_ref || p->only_if_ref); | |
ead1e424 | 2366 | else |
99fff23b ILT |
2367 | this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size, |
2368 | p->type, p->binding, p->visibility, p->nonvis, | |
caa9d5d9 ILT |
2369 | only_if_ref || p->only_if_ref, |
2370 | false); | |
ead1e424 ILT |
2371 | } |
2372 | } | |
2373 | ||
46fe1623 ILT |
2374 | // Define CSYM using a COPY reloc. POSD is the Output_data where the |
2375 | // symbol should be defined--typically a .dyn.bss section. VALUE is | |
2376 | // the offset within POSD. | |
2377 | ||
2378 | template<int size> | |
2379 | void | |
fe8718a4 | 2380 | Symbol_table::define_with_copy_reloc( |
fe8718a4 ILT |
2381 | Sized_symbol<size>* csym, |
2382 | Output_data* posd, | |
2ea97941 | 2383 | typename elfcpp::Elf_types<size>::Elf_Addr value) |
46fe1623 ILT |
2384 | { |
2385 | gold_assert(csym->is_from_dynobj()); | |
2386 | gold_assert(!csym->is_copied_from_dynobj()); | |
2ea97941 ILT |
2387 | Object* object = csym->object(); |
2388 | gold_assert(object->is_dynamic()); | |
2389 | Dynobj* dynobj = static_cast<Dynobj*>(object); | |
46fe1623 ILT |
2390 | |
2391 | // Our copied variable has to override any variable in a shared | |
2392 | // library. | |
2393 | elfcpp::STB binding = csym->binding(); | |
2394 | if (binding == elfcpp::STB_WEAK) | |
2395 | binding = elfcpp::STB_GLOBAL; | |
2396 | ||
99fff23b | 2397 | this->define_in_output_data(csym->name(), csym->version(), COPY, |
2ea97941 | 2398 | posd, value, csym->symsize(), |
46fe1623 ILT |
2399 | csym->type(), binding, |
2400 | csym->visibility(), csym->nonvis(), | |
2401 | false, false); | |
2402 | ||
2403 | csym->set_is_copied_from_dynobj(); | |
2404 | csym->set_needs_dynsym_entry(); | |
2405 | ||
2406 | this->copied_symbol_dynobjs_[csym] = dynobj; | |
2407 | ||
2408 | // We have now defined all aliases, but we have not entered them all | |
2409 | // in the copied_symbol_dynobjs_ map. | |
2410 | if (csym->has_alias()) | |
2411 | { | |
2412 | Symbol* sym = csym; | |
2413 | while (true) | |
2414 | { | |
2415 | sym = this->weak_aliases_[sym]; | |
2416 | if (sym == csym) | |
2417 | break; | |
2418 | gold_assert(sym->output_data() == posd); | |
2419 | ||
2420 | sym->set_is_copied_from_dynobj(); | |
2421 | this->copied_symbol_dynobjs_[sym] = dynobj; | |
2422 | } | |
2423 | } | |
2424 | } | |
2425 | ||
2426 | // SYM is defined using a COPY reloc. Return the dynamic object where | |
2427 | // the original definition was found. | |
2428 | ||
2429 | Dynobj* | |
2430 | Symbol_table::get_copy_source(const Symbol* sym) const | |
2431 | { | |
2432 | gold_assert(sym->is_copied_from_dynobj()); | |
2433 | Copied_symbol_dynobjs::const_iterator p = | |
2434 | this->copied_symbol_dynobjs_.find(sym); | |
2435 | gold_assert(p != this->copied_symbol_dynobjs_.end()); | |
2436 | return p->second; | |
2437 | } | |
2438 | ||
f3e9c5c5 ILT |
2439 | // Add any undefined symbols named on the command line. |
2440 | ||
2441 | void | |
88a4108b | 2442 | Symbol_table::add_undefined_symbols_from_command_line(Layout* layout) |
f3e9c5c5 | 2443 | { |
88a4108b ILT |
2444 | if (parameters->options().any_undefined() |
2445 | || layout->script_options()->any_unreferenced()) | |
f3e9c5c5 ILT |
2446 | { |
2447 | if (parameters->target().get_size() == 32) | |
2448 | { | |
5adf9721 | 2449 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
88a4108b | 2450 | this->do_add_undefined_symbols_from_command_line<32>(layout); |
f3e9c5c5 ILT |
2451 | #else |
2452 | gold_unreachable(); | |
2453 | #endif | |
2454 | } | |
2455 | else if (parameters->target().get_size() == 64) | |
2456 | { | |
2457 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
88a4108b | 2458 | this->do_add_undefined_symbols_from_command_line<64>(layout); |
f3e9c5c5 ILT |
2459 | #else |
2460 | gold_unreachable(); | |
2461 | #endif | |
2462 | } | |
2463 | else | |
2464 | gold_unreachable(); | |
2465 | } | |
2466 | } | |
2467 | ||
2468 | template<int size> | |
2469 | void | |
88a4108b | 2470 | Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout) |
f3e9c5c5 ILT |
2471 | { |
2472 | for (options::String_set::const_iterator p = | |
2473 | parameters->options().undefined_begin(); | |
2474 | p != parameters->options().undefined_end(); | |
2475 | ++p) | |
88a4108b | 2476 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); |
f3e9c5c5 | 2477 | |
31821be0 CC |
2478 | for (options::String_set::const_iterator p = |
2479 | parameters->options().export_dynamic_symbol_begin(); | |
2480 | p != parameters->options().export_dynamic_symbol_end(); | |
2481 | ++p) | |
2482 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); | |
2483 | ||
88a4108b ILT |
2484 | for (Script_options::referenced_const_iterator p = |
2485 | layout->script_options()->referenced_begin(); | |
2486 | p != layout->script_options()->referenced_end(); | |
2487 | ++p) | |
2488 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); | |
2489 | } | |
2490 | ||
2491 | template<int size> | |
2492 | void | |
2493 | Symbol_table::add_undefined_symbol_from_command_line(const char* name) | |
2494 | { | |
2495 | if (this->lookup(name) != NULL) | |
2496 | return; | |
f3e9c5c5 | 2497 | |
88a4108b | 2498 | const char* version = NULL; |
f3e9c5c5 | 2499 | |
88a4108b ILT |
2500 | Sized_symbol<size>* sym; |
2501 | Sized_symbol<size>* oldsym; | |
2502 | bool resolve_oldsym; | |
2503 | if (parameters->target().is_big_endian()) | |
2504 | { | |
f3e9c5c5 | 2505 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) |
88a4108b | 2506 | sym = this->define_special_symbol<size, true>(&name, &version, |
dc8d2d90 L |
2507 | false, |
2508 | elfcpp::STV_DEFAULT, | |
2509 | &oldsym, | |
40d7d93f CC |
2510 | &resolve_oldsym, |
2511 | false); | |
f3e9c5c5 | 2512 | #else |
88a4108b | 2513 | gold_unreachable(); |
f3e9c5c5 | 2514 | #endif |
88a4108b ILT |
2515 | } |
2516 | else | |
2517 | { | |
f3e9c5c5 | 2518 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) |
88a4108b | 2519 | sym = this->define_special_symbol<size, false>(&name, &version, |
dc8d2d90 L |
2520 | false, |
2521 | elfcpp::STV_DEFAULT, | |
2522 | &oldsym, | |
40d7d93f CC |
2523 | &resolve_oldsym, |
2524 | false); | |
f3e9c5c5 | 2525 | #else |
88a4108b | 2526 | gold_unreachable(); |
f3e9c5c5 | 2527 | #endif |
88a4108b | 2528 | } |
f3e9c5c5 | 2529 | |
88a4108b | 2530 | gold_assert(oldsym == NULL); |
f3e9c5c5 | 2531 | |
dc1c8a16 | 2532 | sym->init_undefined(name, version, 0, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
88a4108b ILT |
2533 | elfcpp::STV_DEFAULT, 0); |
2534 | ++this->saw_undefined_; | |
f3e9c5c5 ILT |
2535 | } |
2536 | ||
a3ad94ed | 2537 | // Set the dynamic symbol indexes. INDEX is the index of the first |
c4d5a762 CC |
2538 | // global dynamic symbol. Pointers to the global symbols are stored |
2539 | // into the vector SYMS. The names are added to DYNPOOL. | |
2540 | // This returns an updated dynamic symbol index. | |
a3ad94ed ILT |
2541 | |
2542 | unsigned int | |
9b07f471 | 2543 | Symbol_table::set_dynsym_indexes(unsigned int index, |
c4d5a762 | 2544 | unsigned int* pforced_local_count, |
a3ad94ed | 2545 | std::vector<Symbol*>* syms, |
14b31740 ILT |
2546 | Stringpool* dynpool, |
2547 | Versions* versions) | |
a3ad94ed | 2548 | { |
c4d5a762 CC |
2549 | // First process all the symbols which have been forced to be local, |
2550 | // as they must appear before all global symbols. | |
2551 | unsigned int forced_local_count = 0; | |
2552 | for (Forced_locals::iterator p = this->forced_locals_.begin(); | |
2553 | p != this->forced_locals_.end(); | |
2554 | ++p) | |
2555 | { | |
2556 | Symbol* sym = *p; | |
2557 | gold_assert(sym->is_forced_local()); | |
2558 | if (sym->has_dynsym_index()) | |
2559 | continue; | |
2560 | if (!sym->should_add_dynsym_entry(this)) | |
2561 | sym->set_dynsym_index(-1U); | |
2562 | else | |
2563 | { | |
2564 | sym->set_dynsym_index(index); | |
2565 | ++index; | |
2566 | ++forced_local_count; | |
2567 | dynpool->add(sym->name(), false, NULL); | |
aa465b19 AM |
2568 | if (sym->type() == elfcpp::STT_GNU_IFUNC) |
2569 | this->set_has_gnu_output(); | |
c4d5a762 CC |
2570 | } |
2571 | } | |
2572 | *pforced_local_count = forced_local_count; | |
2573 | ||
98ff9231 CC |
2574 | // Allow a target to set dynsym indexes. |
2575 | if (parameters->target().has_custom_set_dynsym_indexes()) | |
2576 | { | |
2577 | std::vector<Symbol*> dyn_symbols; | |
2578 | for (Symbol_table_type::iterator p = this->table_.begin(); | |
2579 | p != this->table_.end(); | |
2580 | ++p) | |
2581 | { | |
2582 | Symbol* sym = p->second; | |
c4d5a762 CC |
2583 | if (sym->is_forced_local()) |
2584 | continue; | |
98ff9231 CC |
2585 | if (!sym->should_add_dynsym_entry(this)) |
2586 | sym->set_dynsym_index(-1U); | |
2587 | else | |
aa465b19 AM |
2588 | { |
2589 | dyn_symbols.push_back(sym); | |
2590 | if (sym->type() == elfcpp::STT_GNU_IFUNC | |
2591 | || (sym->binding() == elfcpp::STB_GNU_UNIQUE | |
2592 | && parameters->options().gnu_unique())) | |
2593 | this->set_has_gnu_output(); | |
2594 | } | |
98ff9231 CC |
2595 | } |
2596 | ||
2597 | return parameters->target().set_dynsym_indexes(&dyn_symbols, index, syms, | |
2598 | dynpool, versions, this); | |
2599 | } | |
2600 | ||
a3ad94ed ILT |
2601 | for (Symbol_table_type::iterator p = this->table_.begin(); |
2602 | p != this->table_.end(); | |
2603 | ++p) | |
2604 | { | |
2605 | Symbol* sym = p->second; | |
16649710 | 2606 | |
c4d5a762 CC |
2607 | if (sym->is_forced_local()) |
2608 | continue; | |
2609 | ||
16649710 ILT |
2610 | // Note that SYM may already have a dynamic symbol index, since |
2611 | // some symbols appear more than once in the symbol table, with | |
2612 | // and without a version. | |
2613 | ||
ce97fa81 | 2614 | if (!sym->should_add_dynsym_entry(this)) |
16649710 ILT |
2615 | sym->set_dynsym_index(-1U); |
2616 | else if (!sym->has_dynsym_index()) | |
a3ad94ed ILT |
2617 | { |
2618 | sym->set_dynsym_index(index); | |
2619 | ++index; | |
2620 | syms->push_back(sym); | |
cfd73a4e | 2621 | dynpool->add(sym->name(), false, NULL); |
aa465b19 AM |
2622 | if (sym->type() == elfcpp::STT_GNU_IFUNC |
2623 | || (sym->binding() == elfcpp::STB_GNU_UNIQUE | |
2624 | && parameters->options().gnu_unique())) | |
2625 | this->set_has_gnu_output(); | |
14b31740 | 2626 | |
32e2b61d AM |
2627 | // Record any version information, except those from |
2628 | // as-needed libraries not seen to be needed. Note that the | |
2629 | // is_needed state for such libraries can change in this loop. | |
2630 | if (sym->version() != NULL) | |
2631 | { | |
2632 | if (!sym->is_from_dynobj() | |
2633 | || !sym->object()->as_needed() | |
2634 | || sym->object()->is_needed()) | |
2635 | versions->record_version(this, dynpool, sym); | |
2636 | else | |
cea6ffbd | 2637 | { |
3a12c78d CC |
2638 | if (parameters->options().warn_drop_version()) |
2639 | gold_warning(_("discarding version information for " | |
2640 | "%s@%s, defined in unused shared library %s " | |
2641 | "(linked with --as-needed)"), | |
2642 | sym->name(), sym->version(), | |
2643 | sym->object()->name().c_str()); | |
cea6ffbd CC |
2644 | sym->clear_version(); |
2645 | } | |
32e2b61d | 2646 | } |
a3ad94ed ILT |
2647 | } |
2648 | } | |
2649 | ||
14b31740 ILT |
2650 | // Finish up the versions. In some cases this may add new dynamic |
2651 | // symbols. | |
9b07f471 | 2652 | index = versions->finalize(this, index, syms); |
14b31740 | 2653 | |
dc1c8a16 CC |
2654 | // Process target-specific symbols. |
2655 | for (std::vector<Symbol*>::iterator p = this->target_symbols_.begin(); | |
2656 | p != this->target_symbols_.end(); | |
2657 | ++p) | |
2658 | { | |
2659 | (*p)->set_dynsym_index(index); | |
2660 | ++index; | |
2661 | syms->push_back(*p); | |
2662 | dynpool->add((*p)->name(), false, NULL); | |
2663 | } | |
2664 | ||
a3ad94ed ILT |
2665 | return index; |
2666 | } | |
2667 | ||
c06b7b0b | 2668 | // Set the final values for all the symbols. The index of the first |
55a93433 ILT |
2669 | // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the |
2670 | // file offset OFF. Add their names to POOL. Return the new file | |
c4d5a762 CC |
2671 | // offset. Update *PLOCAL_SYMCOUNT if necessary. DYNOFF and |
2672 | // DYN_GLOBAL_INDEX refer to the start of the symbols that will be | |
2673 | // written from the global symbol table in Symtab::write_globals(), | |
2674 | // which will include forced-local symbols. DYN_GLOBAL_INDEX is | |
2675 | // not necessarily the same as the sh_info field for the .dynsym | |
2676 | // section, which will point to the first real global symbol. | |
54dc6425 | 2677 | |
75f65a3e | 2678 | off_t |
55a93433 ILT |
2679 | Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index, |
2680 | size_t dyncount, Stringpool* pool, | |
ca09d69a | 2681 | unsigned int* plocal_symcount) |
54dc6425 | 2682 | { |
f6ce93d6 ILT |
2683 | off_t ret; |
2684 | ||
55a93433 ILT |
2685 | gold_assert(*plocal_symcount != 0); |
2686 | this->first_global_index_ = *plocal_symcount; | |
c06b7b0b | 2687 | |
16649710 ILT |
2688 | this->dynamic_offset_ = dynoff; |
2689 | this->first_dynamic_global_index_ = dyn_global_index; | |
2690 | this->dynamic_count_ = dyncount; | |
2691 | ||
8851ecca | 2692 | if (parameters->target().get_size() == 32) |
9025d29d ILT |
2693 | { |
2694 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE) | |
55a93433 | 2695 | ret = this->sized_finalize<32>(off, pool, plocal_symcount); |
9025d29d ILT |
2696 | #else |
2697 | gold_unreachable(); | |
2698 | #endif | |
2699 | } | |
8851ecca | 2700 | else if (parameters->target().get_size() == 64) |
9025d29d ILT |
2701 | { |
2702 | #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE) | |
55a93433 | 2703 | ret = this->sized_finalize<64>(off, pool, plocal_symcount); |
9025d29d ILT |
2704 | #else |
2705 | gold_unreachable(); | |
2706 | #endif | |
2707 | } | |
61ba1cf9 | 2708 | else |
a3ad94ed | 2709 | gold_unreachable(); |
f6ce93d6 | 2710 | |
aa465b19 AM |
2711 | if (this->has_gnu_output_) |
2712 | { | |
2713 | Target* target = const_cast<Target*>(¶meters->target()); | |
2714 | if (target->osabi() == elfcpp::ELFOSABI_NONE) | |
2715 | target->set_osabi(elfcpp::ELFOSABI_GNU); | |
2716 | } | |
2717 | ||
f6ce93d6 ILT |
2718 | // Now that we have the final symbol table, we can reliably note |
2719 | // which symbols should get warnings. | |
cb295612 | 2720 | this->warnings_.note_warnings(this); |
f6ce93d6 ILT |
2721 | |
2722 | return ret; | |
75f65a3e ILT |
2723 | } |
2724 | ||
55a93433 ILT |
2725 | // SYM is going into the symbol table at *PINDEX. Add the name to |
2726 | // POOL, update *PINDEX and *POFF. | |
2727 | ||
2728 | template<int size> | |
2729 | void | |
2730 | Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool, | |
2731 | unsigned int* pindex, off_t* poff) | |
2732 | { | |
2733 | sym->set_symtab_index(*pindex); | |
6d1c4efb ILT |
2734 | if (sym->version() == NULL || !parameters->options().relocatable()) |
2735 | pool->add(sym->name(), false, NULL); | |
2736 | else | |
2737 | pool->add(sym->versioned_name(), true, NULL); | |
55a93433 ILT |
2738 | ++*pindex; |
2739 | *poff += elfcpp::Elf_sizes<size>::sym_size; | |
2740 | } | |
2741 | ||
ead1e424 ILT |
2742 | // Set the final value for all the symbols. This is called after |
2743 | // Layout::finalize, so all the output sections have their final | |
2744 | // address. | |
75f65a3e ILT |
2745 | |
2746 | template<int size> | |
2747 | off_t | |
55a93433 ILT |
2748 | Symbol_table::sized_finalize(off_t off, Stringpool* pool, |
2749 | unsigned int* plocal_symcount) | |
75f65a3e | 2750 | { |
ead1e424 | 2751 | off = align_address(off, size >> 3); |
75f65a3e ILT |
2752 | this->offset_ = off; |
2753 | ||
55a93433 ILT |
2754 | unsigned int index = *plocal_symcount; |
2755 | const unsigned int orig_index = index; | |
c06b7b0b | 2756 | |
55a93433 ILT |
2757 | // First do all the symbols which have been forced to be local, as |
2758 | // they must appear before all global symbols. | |
2759 | for (Forced_locals::iterator p = this->forced_locals_.begin(); | |
2760 | p != this->forced_locals_.end(); | |
2761 | ++p) | |
2762 | { | |
2763 | Symbol* sym = *p; | |
2764 | gold_assert(sym->is_forced_local()); | |
2765 | if (this->sized_finalize_symbol<size>(sym)) | |
2766 | { | |
2767 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
2768 | ++*plocal_symcount; | |
aa465b19 AM |
2769 | if (sym->type() == elfcpp::STT_GNU_IFUNC) |
2770 | this->set_has_gnu_output(); | |
55a93433 ILT |
2771 | } |
2772 | } | |
2773 | ||
2774 | // Now do all the remaining symbols. | |
c06b7b0b ILT |
2775 | for (Symbol_table_type::iterator p = this->table_.begin(); |
2776 | p != this->table_.end(); | |
2777 | ++p) | |
54dc6425 | 2778 | { |
55a93433 ILT |
2779 | Symbol* sym = p->second; |
2780 | if (this->sized_finalize_symbol<size>(sym)) | |
aa465b19 AM |
2781 | { |
2782 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
2783 | if (sym->type() == elfcpp::STT_GNU_IFUNC | |
2784 | || (sym->binding() == elfcpp::STB_GNU_UNIQUE | |
2785 | && parameters->options().gnu_unique())) | |
2786 | this->set_has_gnu_output(); | |
2787 | } | |
55a93433 | 2788 | } |
54dc6425 | 2789 | |
dc1c8a16 CC |
2790 | // Now do target-specific symbols. |
2791 | for (std::vector<Symbol*>::iterator p = this->target_symbols_.begin(); | |
2792 | p != this->target_symbols_.end(); | |
2793 | ++p) | |
2794 | { | |
2795 | this->add_to_final_symtab<size>(*p, pool, &index, &off); | |
2796 | } | |
2797 | ||
55a93433 | 2798 | this->output_count_ = index - orig_index; |
a3ad94ed | 2799 | |
55a93433 ILT |
2800 | return off; |
2801 | } | |
75f65a3e | 2802 | |
c0a62865 DK |
2803 | // Compute the final value of SYM and store status in location PSTATUS. |
2804 | // During relaxation, this may be called multiple times for a symbol to | |
2805 | // compute its would-be final value in each relaxation pass. | |
008db82e | 2806 | |
55a93433 | 2807 | template<int size> |
c0a62865 DK |
2808 | typename Sized_symbol<size>::Value_type |
2809 | Symbol_table::compute_final_value( | |
2810 | const Sized_symbol<size>* sym, | |
2811 | Compute_final_value_status* pstatus) const | |
55a93433 | 2812 | { |
ef9beddf | 2813 | typedef typename Sized_symbol<size>::Value_type Value_type; |
2ea97941 | 2814 | Value_type value; |
ead1e424 | 2815 | |
55a93433 ILT |
2816 | switch (sym->source()) |
2817 | { | |
2818 | case Symbol::FROM_OBJECT: | |
2819 | { | |
d491d34e | 2820 | bool is_ordinary; |
2ea97941 | 2821 | unsigned int shndx = sym->shndx(&is_ordinary); |
ead1e424 | 2822 | |
d491d34e | 2823 | if (!is_ordinary |
2ea97941 ILT |
2824 | && shndx != elfcpp::SHN_ABS |
2825 | && !Symbol::is_common_shndx(shndx)) | |
55a93433 | 2826 | { |
c0a62865 DK |
2827 | *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION; |
2828 | return 0; | |
ead1e424 | 2829 | } |
ead1e424 | 2830 | |
55a93433 ILT |
2831 | Object* symobj = sym->object(); |
2832 | if (symobj->is_dynamic()) | |
ead1e424 | 2833 | { |
2ea97941 ILT |
2834 | value = 0; |
2835 | shndx = elfcpp::SHN_UNDEF; | |
ead1e424 | 2836 | } |
89fc3421 CC |
2837 | else if (symobj->pluginobj() != NULL) |
2838 | { | |
2ea97941 ILT |
2839 | value = 0; |
2840 | shndx = elfcpp::SHN_UNDEF; | |
89fc3421 | 2841 | } |
2ea97941 ILT |
2842 | else if (shndx == elfcpp::SHN_UNDEF) |
2843 | value = 0; | |
d491d34e | 2844 | else if (!is_ordinary |
2ea97941 ILT |
2845 | && (shndx == elfcpp::SHN_ABS |
2846 | || Symbol::is_common_shndx(shndx))) | |
2847 | value = sym->value(); | |
55a93433 | 2848 | else |
ead1e424 | 2849 | { |
55a93433 | 2850 | Relobj* relobj = static_cast<Relobj*>(symobj); |
2ea97941 | 2851 | Output_section* os = relobj->output_section(shndx); |
55a93433 | 2852 | |
2ea97941 | 2853 | if (this->is_section_folded(relobj, shndx)) |
ef15dade ST |
2854 | { |
2855 | gold_assert(os == NULL); | |
2856 | // Get the os of the section it is folded onto. | |
2857 | Section_id folded = this->icf_->get_folded_section(relobj, | |
2ea97941 | 2858 | shndx); |
ef15dade ST |
2859 | gold_assert(folded.first != NULL); |
2860 | Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first); | |
d6344fb5 DK |
2861 | unsigned folded_shndx = folded.second; |
2862 | ||
2863 | os = folded_obj->output_section(folded_shndx); | |
ef15dade | 2864 | gold_assert(os != NULL); |
d6344fb5 DK |
2865 | |
2866 | // Replace (relobj, shndx) with canonical ICF input section. | |
2867 | shndx = folded_shndx; | |
2868 | relobj = folded_obj; | |
ef15dade ST |
2869 | } |
2870 | ||
d6344fb5 | 2871 | uint64_t secoff64 = relobj->output_section_offset(shndx); |
ef15dade | 2872 | if (os == NULL) |
ead1e424 | 2873 | { |
6d03d481 ST |
2874 | bool static_or_reloc = (parameters->doing_static_link() || |
2875 | parameters->options().relocatable()); | |
2876 | gold_assert(static_or_reloc || sym->dynsym_index() == -1U); | |
2877 | ||
c0a62865 DK |
2878 | *pstatus = CFVS_NO_OUTPUT_SECTION; |
2879 | return 0; | |
ead1e424 | 2880 | } |
55a93433 | 2881 | |
eff45813 CC |
2882 | if (secoff64 == -1ULL) |
2883 | { | |
2884 | // The section needs special handling (e.g., a merge section). | |
ef15dade | 2885 | |
2ea97941 | 2886 | value = os->output_address(relobj, shndx, sym->value()); |
eff45813 CC |
2887 | } |
2888 | else | |
2889 | { | |
2890 | Value_type secoff = | |
2891 | convert_types<Value_type, uint64_t>(secoff64); | |
2892 | if (sym->type() == elfcpp::STT_TLS) | |
2ea97941 | 2893 | value = sym->value() + os->tls_offset() + secoff; |
eff45813 | 2894 | else |
2ea97941 | 2895 | value = sym->value() + os->address() + secoff; |
eff45813 | 2896 | } |
ead1e424 | 2897 | } |
55a93433 ILT |
2898 | } |
2899 | break; | |
2900 | ||
2901 | case Symbol::IN_OUTPUT_DATA: | |
2902 | { | |
2903 | Output_data* od = sym->output_data(); | |
2ea97941 | 2904 | value = sym->value(); |
155a0dd7 | 2905 | if (sym->type() != elfcpp::STT_TLS) |
2ea97941 | 2906 | value += od->address(); |
155a0dd7 ILT |
2907 | else |
2908 | { | |
2909 | Output_section* os = od->output_section(); | |
2910 | gold_assert(os != NULL); | |
2ea97941 | 2911 | value += os->tls_offset() + (od->address() - os->address()); |
155a0dd7 | 2912 | } |
55a93433 | 2913 | if (sym->offset_is_from_end()) |
2ea97941 | 2914 | value += od->data_size(); |
55a93433 ILT |
2915 | } |
2916 | break; | |
2917 | ||
2918 | case Symbol::IN_OUTPUT_SEGMENT: | |
2919 | { | |
2920 | Output_segment* os = sym->output_segment(); | |
2ea97941 | 2921 | value = sym->value(); |
edfbb029 | 2922 | if (sym->type() != elfcpp::STT_TLS) |
2ea97941 | 2923 | value += os->vaddr(); |
55a93433 ILT |
2924 | switch (sym->offset_base()) |
2925 | { | |
2926 | case Symbol::SEGMENT_START: | |
2927 | break; | |
2928 | case Symbol::SEGMENT_END: | |
2ea97941 | 2929 | value += os->memsz(); |
55a93433 ILT |
2930 | break; |
2931 | case Symbol::SEGMENT_BSS: | |
2ea97941 | 2932 | value += os->filesz(); |
55a93433 ILT |
2933 | break; |
2934 | default: | |
2935 | gold_unreachable(); | |
2936 | } | |
2937 | } | |
2938 | break; | |
ead1e424 | 2939 | |
f3e9c5c5 | 2940 | case Symbol::IS_CONSTANT: |
2ea97941 | 2941 | value = sym->value(); |
55a93433 | 2942 | break; |
ead1e424 | 2943 | |
f3e9c5c5 | 2944 | case Symbol::IS_UNDEFINED: |
2ea97941 | 2945 | value = 0; |
f3e9c5c5 ILT |
2946 | break; |
2947 | ||
55a93433 ILT |
2948 | default: |
2949 | gold_unreachable(); | |
2950 | } | |
ead1e424 | 2951 | |
c0a62865 | 2952 | *pstatus = CFVS_OK; |
2ea97941 | 2953 | return value; |
c0a62865 DK |
2954 | } |
2955 | ||
2956 | // Finalize the symbol SYM. This returns true if the symbol should be | |
2957 | // added to the symbol table, false otherwise. | |
2958 | ||
2959 | template<int size> | |
2960 | bool | |
2961 | Symbol_table::sized_finalize_symbol(Symbol* unsized_sym) | |
2962 | { | |
2963 | typedef typename Sized_symbol<size>::Value_type Value_type; | |
2964 | ||
2965 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym); | |
2966 | ||
2967 | // The default version of a symbol may appear twice in the symbol | |
2968 | // table. We only need to finalize it once. | |
2969 | if (sym->has_symtab_index()) | |
2970 | return false; | |
2971 | ||
2972 | if (!sym->in_reg()) | |
2973 | { | |
2974 | gold_assert(!sym->has_symtab_index()); | |
2975 | sym->set_symtab_index(-1U); | |
2976 | gold_assert(sym->dynsym_index() == -1U); | |
2977 | return false; | |
2978 | } | |
2979 | ||
badc8139 RÁE |
2980 | // If the symbol is only present on plugin files, the plugin decided we |
2981 | // don't need it. | |
2982 | if (!sym->in_real_elf()) | |
2983 | { | |
2984 | gold_assert(!sym->has_symtab_index()); | |
2985 | sym->set_symtab_index(-1U); | |
2986 | return false; | |
2987 | } | |
2988 | ||
c0a62865 DK |
2989 | // Compute final symbol value. |
2990 | Compute_final_value_status status; | |
2ea97941 | 2991 | Value_type value = this->compute_final_value(sym, &status); |
c0a62865 DK |
2992 | |
2993 | switch (status) | |
2994 | { | |
2995 | case CFVS_OK: | |
2996 | break; | |
2997 | case CFVS_UNSUPPORTED_SYMBOL_SECTION: | |
2998 | { | |
2999 | bool is_ordinary; | |
2ea97941 | 3000 | unsigned int shndx = sym->shndx(&is_ordinary); |
c0a62865 | 3001 | gold_error(_("%s: unsupported symbol section 0x%x"), |
2ea97941 | 3002 | sym->demangled_name().c_str(), shndx); |
c0a62865 DK |
3003 | } |
3004 | break; | |
3005 | case CFVS_NO_OUTPUT_SECTION: | |
3006 | sym->set_symtab_index(-1U); | |
3007 | return false; | |
3008 | default: | |
3009 | gold_unreachable(); | |
3010 | } | |
3011 | ||
2ea97941 | 3012 | sym->set_value(value); |
9e2dcb77 | 3013 | |
8c604651 CS |
3014 | if (parameters->options().strip_all() |
3015 | || !parameters->options().should_retain_symbol(sym->name())) | |
55a93433 ILT |
3016 | { |
3017 | sym->set_symtab_index(-1U); | |
3018 | return false; | |
54dc6425 | 3019 | } |
75f65a3e | 3020 | |
55a93433 | 3021 | return true; |
54dc6425 ILT |
3022 | } |
3023 | ||
61ba1cf9 ILT |
3024 | // Write out the global symbols. |
3025 | ||
3026 | void | |
fd9d194f | 3027 | Symbol_table::write_globals(const Stringpool* sympool, |
d491d34e ILT |
3028 | const Stringpool* dynpool, |
3029 | Output_symtab_xindex* symtab_xindex, | |
3030 | Output_symtab_xindex* dynsym_xindex, | |
3031 | Output_file* of) const | |
61ba1cf9 | 3032 | { |
8851ecca | 3033 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 3034 | { |
9025d29d | 3035 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca | 3036 | case Parameters::TARGET_32_LITTLE: |
fd9d194f | 3037 | this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex, |
d491d34e | 3038 | dynsym_xindex, of); |
8851ecca | 3039 | break; |
9025d29d | 3040 | #endif |
8851ecca ILT |
3041 | #ifdef HAVE_TARGET_32_BIG |
3042 | case Parameters::TARGET_32_BIG: | |
fd9d194f | 3043 | this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex, |
d491d34e | 3044 | dynsym_xindex, of); |
8851ecca | 3045 | break; |
9025d29d | 3046 | #endif |
9025d29d | 3047 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca | 3048 | case Parameters::TARGET_64_LITTLE: |
fd9d194f | 3049 | this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex, |
d491d34e | 3050 | dynsym_xindex, of); |
8851ecca | 3051 | break; |
9025d29d | 3052 | #endif |
8851ecca ILT |
3053 | #ifdef HAVE_TARGET_64_BIG |
3054 | case Parameters::TARGET_64_BIG: | |
fd9d194f | 3055 | this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex, |
d491d34e | 3056 | dynsym_xindex, of); |
8851ecca ILT |
3057 | break; |
3058 | #endif | |
3059 | default: | |
3060 | gold_unreachable(); | |
61ba1cf9 | 3061 | } |
61ba1cf9 ILT |
3062 | } |
3063 | ||
3064 | // Write out the global symbols. | |
3065 | ||
3066 | template<int size, bool big_endian> | |
3067 | void | |
fd9d194f | 3068 | Symbol_table::sized_write_globals(const Stringpool* sympool, |
16649710 | 3069 | const Stringpool* dynpool, |
d491d34e ILT |
3070 | Output_symtab_xindex* symtab_xindex, |
3071 | Output_symtab_xindex* dynsym_xindex, | |
61ba1cf9 ILT |
3072 | Output_file* of) const |
3073 | { | |
8851ecca | 3074 | const Target& target = parameters->target(); |
9a2d6984 | 3075 | |
61ba1cf9 | 3076 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
55a93433 ILT |
3077 | |
3078 | const unsigned int output_count = this->output_count_; | |
3079 | const section_size_type oview_size = output_count * sym_size; | |
3080 | const unsigned int first_global_index = this->first_global_index_; | |
5fe2a0f5 ILT |
3081 | unsigned char* psyms; |
3082 | if (this->offset_ == 0 || output_count == 0) | |
3083 | psyms = NULL; | |
3084 | else | |
3085 | psyms = of->get_output_view(this->offset_, oview_size); | |
16649710 | 3086 | |
55a93433 ILT |
3087 | const unsigned int dynamic_count = this->dynamic_count_; |
3088 | const section_size_type dynamic_size = dynamic_count * sym_size; | |
3089 | const unsigned int first_dynamic_global_index = | |
3090 | this->first_dynamic_global_index_; | |
16649710 | 3091 | unsigned char* dynamic_view; |
5fe2a0f5 | 3092 | if (this->dynamic_offset_ == 0 || dynamic_count == 0) |
16649710 ILT |
3093 | dynamic_view = NULL; |
3094 | else | |
3095 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); | |
c06b7b0b | 3096 | |
61ba1cf9 ILT |
3097 | for (Symbol_table_type::const_iterator p = this->table_.begin(); |
3098 | p != this->table_.end(); | |
3099 | ++p) | |
3100 | { | |
3101 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); | |
3102 | ||
9a2d6984 | 3103 | // Possibly warn about unresolved symbols in shared libraries. |
fd9d194f | 3104 | this->warn_about_undefined_dynobj_symbol(sym); |
e2827e5f | 3105 | |
a3ad94ed | 3106 | unsigned int sym_index = sym->symtab_index(); |
16649710 ILT |
3107 | unsigned int dynsym_index; |
3108 | if (dynamic_view == NULL) | |
3109 | dynsym_index = -1U; | |
3110 | else | |
3111 | dynsym_index = sym->dynsym_index(); | |
3112 | ||
3113 | if (sym_index == -1U && dynsym_index == -1U) | |
a3ad94ed ILT |
3114 | { |
3115 | // This symbol is not included in the output file. | |
3116 | continue; | |
3117 | } | |
16649710 | 3118 | |
2ea97941 | 3119 | unsigned int shndx; |
88dd47ac ILT |
3120 | typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value(); |
3121 | typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value; | |
ce279a62 | 3122 | elfcpp::STB binding = sym->binding(); |
9634ed06 | 3123 | |
a100d66f ST |
3124 | // If --weak-unresolved-symbols is set, change binding of unresolved |
3125 | // global symbols to STB_WEAK. | |
3126 | if (parameters->options().weak_unresolved_symbols() | |
3127 | && binding == elfcpp::STB_GLOBAL | |
3128 | && sym->is_undefined()) | |
3129 | binding = elfcpp::STB_WEAK; | |
3130 | ||
9634ed06 CC |
3131 | // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL. |
3132 | if (binding == elfcpp::STB_GNU_UNIQUE | |
3133 | && !parameters->options().gnu_unique()) | |
3134 | binding = elfcpp::STB_GLOBAL; | |
3135 | ||
ead1e424 ILT |
3136 | switch (sym->source()) |
3137 | { | |
3138 | case Symbol::FROM_OBJECT: | |
3139 | { | |
d491d34e ILT |
3140 | bool is_ordinary; |
3141 | unsigned int in_shndx = sym->shndx(&is_ordinary); | |
ead1e424 | 3142 | |
d491d34e | 3143 | if (!is_ordinary |
0dfbdef4 | 3144 | && in_shndx != elfcpp::SHN_ABS |
8a5e3e08 | 3145 | && !Symbol::is_common_shndx(in_shndx)) |
ead1e424 | 3146 | { |
75f2446e | 3147 | gold_error(_("%s: unsupported symbol section 0x%x"), |
a2b1aa12 | 3148 | sym->demangled_name().c_str(), in_shndx); |
2ea97941 | 3149 | shndx = in_shndx; |
f6ce93d6 | 3150 | } |
ead1e424 ILT |
3151 | else |
3152 | { | |
75f2446e ILT |
3153 | Object* symobj = sym->object(); |
3154 | if (symobj->is_dynamic()) | |
3155 | { | |
3156 | if (sym->needs_dynsym_value()) | |
8851ecca | 3157 | dynsym_value = target.dynsym_value(sym); |
2ea97941 | 3158 | shndx = elfcpp::SHN_UNDEF; |
ce279a62 CC |
3159 | if (sym->is_undef_binding_weak()) |
3160 | binding = elfcpp::STB_WEAK; | |
74f67560 DK |
3161 | else |
3162 | binding = elfcpp::STB_GLOBAL; | |
75f2446e | 3163 | } |
89fc3421 | 3164 | else if (symobj->pluginobj() != NULL) |
2ea97941 | 3165 | shndx = elfcpp::SHN_UNDEF; |
75f2446e | 3166 | else if (in_shndx == elfcpp::SHN_UNDEF |
d491d34e ILT |
3167 | || (!is_ordinary |
3168 | && (in_shndx == elfcpp::SHN_ABS | |
8a5e3e08 | 3169 | || Symbol::is_common_shndx(in_shndx)))) |
2ea97941 | 3170 | shndx = in_shndx; |
75f2446e ILT |
3171 | else |
3172 | { | |
3173 | Relobj* relobj = static_cast<Relobj*>(symobj); | |
ef9beddf | 3174 | Output_section* os = relobj->output_section(in_shndx); |
ef15dade ST |
3175 | if (this->is_section_folded(relobj, in_shndx)) |
3176 | { | |
3177 | // This global symbol must be written out even though | |
3178 | // it is folded. | |
3179 | // Get the os of the section it is folded onto. | |
3180 | Section_id folded = | |
3181 | this->icf_->get_folded_section(relobj, in_shndx); | |
3182 | gold_assert(folded.first !=NULL); | |
3183 | Relobj* folded_obj = | |
3184 | reinterpret_cast<Relobj*>(folded.first); | |
3185 | os = folded_obj->output_section(folded.second); | |
3186 | gold_assert(os != NULL); | |
3187 | } | |
75f2446e | 3188 | gold_assert(os != NULL); |
2ea97941 | 3189 | shndx = os->out_shndx(); |
88dd47ac | 3190 | |
2ea97941 | 3191 | if (shndx >= elfcpp::SHN_LORESERVE) |
d491d34e ILT |
3192 | { |
3193 | if (sym_index != -1U) | |
2ea97941 | 3194 | symtab_xindex->add(sym_index, shndx); |
d491d34e | 3195 | if (dynsym_index != -1U) |
2ea97941 ILT |
3196 | dynsym_xindex->add(dynsym_index, shndx); |
3197 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e ILT |
3198 | } |
3199 | ||
88dd47ac ILT |
3200 | // In object files symbol values are section |
3201 | // relative. | |
8851ecca | 3202 | if (parameters->options().relocatable()) |
88dd47ac | 3203 | sym_value -= os->address(); |
75f2446e | 3204 | } |
ead1e424 ILT |
3205 | } |
3206 | } | |
3207 | break; | |
3208 | ||
3209 | case Symbol::IN_OUTPUT_DATA: | |
502e8a84 CC |
3210 | { |
3211 | Output_data* od = sym->output_data(); | |
3212 | ||
3213 | shndx = od->out_shndx(); | |
3214 | if (shndx >= elfcpp::SHN_LORESERVE) | |
3215 | { | |
3216 | if (sym_index != -1U) | |
3217 | symtab_xindex->add(sym_index, shndx); | |
3218 | if (dynsym_index != -1U) | |
3219 | dynsym_xindex->add(dynsym_index, shndx); | |
3220 | shndx = elfcpp::SHN_XINDEX; | |
3221 | } | |
3222 | ||
3223 | // In object files symbol values are section | |
3224 | // relative. | |
3225 | if (parameters->options().relocatable()) | |
89ede9f5 CC |
3226 | { |
3227 | Output_section* os = od->output_section(); | |
3228 | gold_assert(os != NULL); | |
3229 | sym_value -= os->address(); | |
3230 | } | |
502e8a84 | 3231 | } |
ead1e424 ILT |
3232 | break; |
3233 | ||
3234 | case Symbol::IN_OUTPUT_SEGMENT: | |
eb390844 CC |
3235 | { |
3236 | Output_segment* oseg = sym->output_segment(); | |
3237 | Output_section* osect = oseg->first_section(); | |
3238 | if (osect == NULL) | |
3239 | shndx = elfcpp::SHN_ABS; | |
3240 | else | |
3241 | shndx = osect->out_shndx(); | |
3242 | } | |
ead1e424 ILT |
3243 | break; |
3244 | ||
f3e9c5c5 | 3245 | case Symbol::IS_CONSTANT: |
2ea97941 | 3246 | shndx = elfcpp::SHN_ABS; |
ead1e424 ILT |
3247 | break; |
3248 | ||
f3e9c5c5 | 3249 | case Symbol::IS_UNDEFINED: |
2ea97941 | 3250 | shndx = elfcpp::SHN_UNDEF; |
f3e9c5c5 ILT |
3251 | break; |
3252 | ||
ead1e424 | 3253 | default: |
a3ad94ed | 3254 | gold_unreachable(); |
ead1e424 | 3255 | } |
61ba1cf9 | 3256 | |
16649710 ILT |
3257 | if (sym_index != -1U) |
3258 | { | |
55a93433 ILT |
3259 | sym_index -= first_global_index; |
3260 | gold_assert(sym_index < output_count); | |
3261 | unsigned char* ps = psyms + (sym_index * sym_size); | |
2ea97941 | 3262 | this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx, |
ce279a62 | 3263 | binding, sympool, ps); |
16649710 | 3264 | } |
61ba1cf9 | 3265 | |
16649710 ILT |
3266 | if (dynsym_index != -1U) |
3267 | { | |
3268 | dynsym_index -= first_dynamic_global_index; | |
3269 | gold_assert(dynsym_index < dynamic_count); | |
3270 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
2ea97941 | 3271 | this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx, |
ce279a62 | 3272 | binding, dynpool, pd); |
800d9823 CC |
3273 | // Allow a target to adjust dynamic symbol value. |
3274 | parameters->target().adjust_dyn_symbol(sym, pd); | |
16649710 | 3275 | } |
61ba1cf9 ILT |
3276 | } |
3277 | ||
dc1c8a16 CC |
3278 | // Write the target-specific symbols. |
3279 | for (std::vector<Symbol*>::const_iterator p = this->target_symbols_.begin(); | |
3280 | p != this->target_symbols_.end(); | |
3281 | ++p) | |
3282 | { | |
3283 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(*p); | |
3284 | ||
3285 | unsigned int sym_index = sym->symtab_index(); | |
3286 | unsigned int dynsym_index; | |
3287 | if (dynamic_view == NULL) | |
3288 | dynsym_index = -1U; | |
3289 | else | |
3290 | dynsym_index = sym->dynsym_index(); | |
3291 | ||
3292 | unsigned int shndx; | |
3293 | switch (sym->source()) | |
3294 | { | |
3295 | case Symbol::IS_CONSTANT: | |
3296 | shndx = elfcpp::SHN_ABS; | |
3297 | break; | |
3298 | case Symbol::IS_UNDEFINED: | |
3299 | shndx = elfcpp::SHN_UNDEF; | |
3300 | break; | |
3301 | default: | |
3302 | gold_unreachable(); | |
3303 | } | |
3304 | ||
3305 | if (sym_index != -1U) | |
3306 | { | |
3307 | sym_index -= first_global_index; | |
3308 | gold_assert(sym_index < output_count); | |
3309 | unsigned char* ps = psyms + (sym_index * sym_size); | |
3310 | this->sized_write_symbol<size, big_endian>(sym, sym->value(), shndx, | |
3311 | sym->binding(), sympool, | |
3312 | ps); | |
3313 | } | |
3314 | ||
3315 | if (dynsym_index != -1U) | |
3316 | { | |
3317 | dynsym_index -= first_dynamic_global_index; | |
3318 | gold_assert(dynsym_index < dynamic_count); | |
3319 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
3320 | this->sized_write_symbol<size, big_endian>(sym, sym->value(), shndx, | |
3321 | sym->binding(), dynpool, | |
3322 | pd); | |
3323 | } | |
3324 | } | |
3325 | ||
c06b7b0b | 3326 | of->write_output_view(this->offset_, oview_size, psyms); |
16649710 ILT |
3327 | if (dynamic_view != NULL) |
3328 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); | |
3329 | } | |
3330 | ||
3331 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the | |
3332 | // strtab holding the name. | |
3333 | ||
3334 | template<int size, bool big_endian> | |
3335 | void | |
ab5c9e90 ILT |
3336 | Symbol_table::sized_write_symbol( |
3337 | Sized_symbol<size>* sym, | |
2ea97941 ILT |
3338 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
3339 | unsigned int shndx, | |
ce279a62 | 3340 | elfcpp::STB binding, |
ab5c9e90 | 3341 | const Stringpool* pool, |
7d1a9ebb | 3342 | unsigned char* p) const |
16649710 ILT |
3343 | { |
3344 | elfcpp::Sym_write<size, big_endian> osym(p); | |
6d1c4efb ILT |
3345 | if (sym->version() == NULL || !parameters->options().relocatable()) |
3346 | osym.put_st_name(pool->get_offset(sym->name())); | |
3347 | else | |
3348 | osym.put_st_name(pool->get_offset(sym->versioned_name())); | |
2ea97941 | 3349 | osym.put_st_value(value); |
58e54ac2 | 3350 | // Use a symbol size of zero for undefined symbols from shared libraries. |
2ea97941 | 3351 | if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj()) |
58e54ac2 CD |
3352 | osym.put_st_size(0); |
3353 | else | |
3354 | osym.put_st_size(sym->symsize()); | |
53d7974c | 3355 | elfcpp::STT type = sym->type(); |
358de988 | 3356 | gold_assert(type != elfcpp::STT_GNU_IFUNC || !sym->is_from_dynobj()); |
55a93433 ILT |
3357 | // A version script may have overridden the default binding. |
3358 | if (sym->is_forced_local()) | |
53d7974c | 3359 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type)); |
55a93433 | 3360 | else |
ce279a62 | 3361 | osym.put_st_info(elfcpp::elf_st_info(binding, type)); |
16649710 | 3362 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); |
2ea97941 | 3363 | osym.put_st_shndx(shndx); |
61ba1cf9 ILT |
3364 | } |
3365 | ||
9a2d6984 ILT |
3366 | // Check for unresolved symbols in shared libraries. This is |
3367 | // controlled by the --allow-shlib-undefined option. | |
3368 | ||
3369 | // We only warn about libraries for which we have seen all the | |
3370 | // DT_NEEDED entries. We don't try to track down DT_NEEDED entries | |
3371 | // which were not seen in this link. If we didn't see a DT_NEEDED | |
3372 | // entry, we aren't going to be able to reliably report whether the | |
3373 | // symbol is undefined. | |
3374 | ||
fd9d194f ILT |
3375 | // We also don't warn about libraries found in a system library |
3376 | // directory (e.g., /lib or /usr/lib); we assume that those libraries | |
3377 | // are OK. This heuristic avoids problems on GNU/Linux, in which -ldl | |
3378 | // can have undefined references satisfied by ld-linux.so. | |
9a2d6984 ILT |
3379 | |
3380 | inline void | |
fd9d194f | 3381 | Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const |
9a2d6984 | 3382 | { |
d491d34e | 3383 | bool dummy; |
9a2d6984 ILT |
3384 | if (sym->source() == Symbol::FROM_OBJECT |
3385 | && sym->object()->is_dynamic() | |
d491d34e | 3386 | && sym->shndx(&dummy) == elfcpp::SHN_UNDEF |
9a2d6984 | 3387 | && sym->binding() != elfcpp::STB_WEAK |
8851ecca ILT |
3388 | && !parameters->options().allow_shlib_undefined() |
3389 | && !parameters->target().is_defined_by_abi(sym) | |
fd9d194f | 3390 | && !sym->object()->is_in_system_directory()) |
9a2d6984 ILT |
3391 | { |
3392 | // A very ugly cast. | |
3393 | Dynobj* dynobj = static_cast<Dynobj*>(sym->object()); | |
3394 | if (!dynobj->has_unknown_needed_entries()) | |
f073bbf7 | 3395 | gold_undefined_symbol(sym); |
9a2d6984 ILT |
3396 | } |
3397 | } | |
3398 | ||
a3ad94ed ILT |
3399 | // Write out a section symbol. Return the update offset. |
3400 | ||
3401 | void | |
ca09d69a | 3402 | Symbol_table::write_section_symbol(const Output_section* os, |
d491d34e | 3403 | Output_symtab_xindex* symtab_xindex, |
a3ad94ed ILT |
3404 | Output_file* of, |
3405 | off_t offset) const | |
3406 | { | |
8851ecca | 3407 | switch (parameters->size_and_endianness()) |
a3ad94ed | 3408 | { |
9025d29d | 3409 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca | 3410 | case Parameters::TARGET_32_LITTLE: |
d491d34e ILT |
3411 | this->sized_write_section_symbol<32, false>(os, symtab_xindex, of, |
3412 | offset); | |
8851ecca | 3413 | break; |
9025d29d | 3414 | #endif |
8851ecca ILT |
3415 | #ifdef HAVE_TARGET_32_BIG |
3416 | case Parameters::TARGET_32_BIG: | |
d491d34e ILT |
3417 | this->sized_write_section_symbol<32, true>(os, symtab_xindex, of, |
3418 | offset); | |
8851ecca | 3419 | break; |
9025d29d | 3420 | #endif |
9025d29d | 3421 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca | 3422 | case Parameters::TARGET_64_LITTLE: |
d491d34e ILT |
3423 | this->sized_write_section_symbol<64, false>(os, symtab_xindex, of, |
3424 | offset); | |
8851ecca | 3425 | break; |
9025d29d | 3426 | #endif |
8851ecca ILT |
3427 | #ifdef HAVE_TARGET_64_BIG |
3428 | case Parameters::TARGET_64_BIG: | |
d491d34e ILT |
3429 | this->sized_write_section_symbol<64, true>(os, symtab_xindex, of, |
3430 | offset); | |
8851ecca ILT |
3431 | break; |
3432 | #endif | |
3433 | default: | |
3434 | gold_unreachable(); | |
a3ad94ed | 3435 | } |
a3ad94ed ILT |
3436 | } |
3437 | ||
3438 | // Write out a section symbol, specialized for size and endianness. | |
3439 | ||
3440 | template<int size, bool big_endian> | |
3441 | void | |
3442 | Symbol_table::sized_write_section_symbol(const Output_section* os, | |
d491d34e | 3443 | Output_symtab_xindex* symtab_xindex, |
a3ad94ed ILT |
3444 | Output_file* of, |
3445 | off_t offset) const | |
3446 | { | |
3447 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
3448 | ||
3449 | unsigned char* pov = of->get_output_view(offset, sym_size); | |
3450 | ||
3451 | elfcpp::Sym_write<size, big_endian> osym(pov); | |
3452 | osym.put_st_name(0); | |
b4ecf66b ILT |
3453 | if (parameters->options().relocatable()) |
3454 | osym.put_st_value(0); | |
3455 | else | |
3456 | osym.put_st_value(os->address()); | |
a3ad94ed ILT |
3457 | osym.put_st_size(0); |
3458 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, | |
3459 | elfcpp::STT_SECTION)); | |
3460 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); | |
d491d34e | 3461 | |
2ea97941 ILT |
3462 | unsigned int shndx = os->out_shndx(); |
3463 | if (shndx >= elfcpp::SHN_LORESERVE) | |
d491d34e | 3464 | { |
2ea97941 ILT |
3465 | symtab_xindex->add(os->symtab_index(), shndx); |
3466 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e | 3467 | } |
2ea97941 | 3468 | osym.put_st_shndx(shndx); |
a3ad94ed ILT |
3469 | |
3470 | of->write_output_view(offset, sym_size, pov); | |
3471 | } | |
3472 | ||
abaa3995 ILT |
3473 | // Print statistical information to stderr. This is used for --stats. |
3474 | ||
3475 | void | |
3476 | Symbol_table::print_stats() const | |
3477 | { | |
3478 | #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP) | |
3479 | fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"), | |
3480 | program_name, this->table_.size(), this->table_.bucket_count()); | |
3481 | #else | |
3482 | fprintf(stderr, _("%s: symbol table entries: %zu\n"), | |
3483 | program_name, this->table_.size()); | |
3484 | #endif | |
ad8f37d1 | 3485 | this->namepool_.print_stats("symbol table stringpool"); |
abaa3995 ILT |
3486 | } |
3487 | ||
ff541f30 ILT |
3488 | // We check for ODR violations by looking for symbols with the same |
3489 | // name for which the debugging information reports that they were | |
71ff8986 | 3490 | // defined in disjoint source locations. When comparing the source |
55382fb7 ILT |
3491 | // location, we consider instances with the same base filename to be |
3492 | // the same. This is because different object files/shared libraries | |
3493 | // can include the same header file using different paths, and | |
3494 | // different optimization settings can make the line number appear to | |
3495 | // be a couple lines off, and we don't want to report an ODR violation | |
3496 | // in those cases. | |
ff541f30 ILT |
3497 | |
3498 | // This struct is used to compare line information, as returned by | |
7bf1f802 | 3499 | // Dwarf_line_info::one_addr2line. It implements a < comparison |
71ff8986 | 3500 | // operator used with std::sort. |
ff541f30 ILT |
3501 | |
3502 | struct Odr_violation_compare | |
3503 | { | |
3504 | bool | |
3505 | operator()(const std::string& s1, const std::string& s2) const | |
3506 | { | |
55382fb7 | 3507 | // Inputs should be of the form "dirname/filename:linenum" where |
71ff8986 | 3508 | // "dirname/" is optional. We want to compare just the filename:linenum. |
55382fb7 | 3509 | |
71ff8986 | 3510 | // Find the last '/' in each string. |
55382fb7 ILT |
3511 | std::string::size_type s1begin = s1.rfind('/'); |
3512 | std::string::size_type s2begin = s2.rfind('/'); | |
55382fb7 ILT |
3513 | // If there was no '/' in a string, start at the beginning. |
3514 | if (s1begin == std::string::npos) | |
3515 | s1begin = 0; | |
3516 | if (s2begin == std::string::npos) | |
3517 | s2begin = 0; | |
71ff8986 ILT |
3518 | return s1.compare(s1begin, std::string::npos, |
3519 | s2, s2begin, std::string::npos) < 0; | |
ff541f30 ILT |
3520 | } |
3521 | }; | |
3522 | ||
71ff8986 ILT |
3523 | // Returns all of the lines attached to LOC, not just the one the |
3524 | // instruction actually came from. | |
3525 | std::vector<std::string> | |
3526 | Symbol_table::linenos_from_loc(const Task* task, | |
3527 | const Symbol_location& loc) | |
3528 | { | |
3529 | // We need to lock the object in order to read it. This | |
3530 | // means that we have to run in a singleton Task. If we | |
3531 | // want to run this in a general Task for better | |
3532 | // performance, we will need one Task for object, plus | |
3533 | // appropriate locking to ensure that we don't conflict with | |
3534 | // other uses of the object. Also note, one_addr2line is not | |
3535 | // currently thread-safe. | |
3536 | Task_lock_obj<Object> tl(task, loc.object); | |
3537 | ||
3538 | std::vector<std::string> result; | |
dc3714f3 AM |
3539 | Symbol_location code_loc = loc; |
3540 | parameters->target().function_location(&code_loc); | |
71ff8986 ILT |
3541 | // 16 is the size of the object-cache that one_addr2line should use. |
3542 | std::string canonical_result = Dwarf_line_info::one_addr2line( | |
dc3714f3 | 3543 | code_loc.object, code_loc.shndx, code_loc.offset, 16, &result); |
71ff8986 ILT |
3544 | if (!canonical_result.empty()) |
3545 | result.push_back(canonical_result); | |
3546 | return result; | |
3547 | } | |
3548 | ||
3549 | // OutputIterator that records if it was ever assigned to. This | |
3550 | // allows it to be used with std::set_intersection() to check for | |
3551 | // intersection rather than computing the intersection. | |
3552 | struct Check_intersection | |
3553 | { | |
3554 | Check_intersection() | |
3555 | : value_(false) | |
3556 | {} | |
3557 | ||
3558 | bool had_intersection() const | |
3559 | { return this->value_; } | |
3560 | ||
3561 | Check_intersection& operator++() | |
3562 | { return *this; } | |
3563 | ||
3564 | Check_intersection& operator*() | |
3565 | { return *this; } | |
3566 | ||
3567 | template<typename T> | |
3568 | Check_intersection& operator=(const T&) | |
3569 | { | |
3570 | this->value_ = true; | |
3571 | return *this; | |
3572 | } | |
3573 | ||
3574 | private: | |
3575 | bool value_; | |
3576 | }; | |
3577 | ||
70e654ba | 3578 | // Check candidate_odr_violations_ to find symbols with the same name |
71ff8986 ILT |
3579 | // but apparently different definitions (different source-file/line-no |
3580 | // for each line assigned to the first instruction). | |
70e654ba ILT |
3581 | |
3582 | void | |
17a1d0a9 ILT |
3583 | Symbol_table::detect_odr_violations(const Task* task, |
3584 | const char* output_file_name) const | |
70e654ba ILT |
3585 | { |
3586 | for (Odr_map::const_iterator it = candidate_odr_violations_.begin(); | |
3587 | it != candidate_odr_violations_.end(); | |
3588 | ++it) | |
3589 | { | |
71ff8986 ILT |
3590 | const char* const symbol_name = it->first; |
3591 | ||
3592 | std::string first_object_name; | |
3593 | std::vector<std::string> first_object_linenos; | |
3594 | ||
3595 | Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator | |
3596 | locs = it->second.begin(); | |
3597 | const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator | |
3598 | locs_end = it->second.end(); | |
3599 | for (; locs != locs_end && first_object_linenos.empty(); ++locs) | |
70e654ba | 3600 | { |
71ff8986 ILT |
3601 | // Save the line numbers from the first definition to |
3602 | // compare to the other definitions. Ideally, we'd compare | |
3603 | // every definition to every other, but we don't want to | |
3604 | // take O(N^2) time to do this. This shortcut may cause | |
3605 | // false negatives that appear or disappear depending on the | |
3606 | // link order, but it won't cause false positives. | |
3607 | first_object_name = locs->object->name(); | |
3608 | first_object_linenos = this->linenos_from_loc(task, *locs); | |
70e654ba | 3609 | } |
437ddf0c CC |
3610 | if (first_object_linenos.empty()) |
3611 | continue; | |
70e654ba | 3612 | |
71ff8986 | 3613 | // Sort by Odr_violation_compare to make std::set_intersection work. |
437ddf0c | 3614 | std::string first_object_canonical_result = first_object_linenos.back(); |
71ff8986 ILT |
3615 | std::sort(first_object_linenos.begin(), first_object_linenos.end(), |
3616 | Odr_violation_compare()); | |
3617 | ||
3618 | for (; locs != locs_end; ++locs) | |
70e654ba | 3619 | { |
71ff8986 ILT |
3620 | std::vector<std::string> linenos = |
3621 | this->linenos_from_loc(task, *locs); | |
3622 | // linenos will be empty if we couldn't parse the debug info. | |
3623 | if (linenos.empty()) | |
3624 | continue; | |
3625 | // Sort by Odr_violation_compare to make std::set_intersection work. | |
437ddf0c CC |
3626 | gold_assert(!linenos.empty()); |
3627 | std::string second_object_canonical_result = linenos.back(); | |
71ff8986 ILT |
3628 | std::sort(linenos.begin(), linenos.end(), Odr_violation_compare()); |
3629 | ||
3630 | Check_intersection intersection_result = | |
3631 | std::set_intersection(first_object_linenos.begin(), | |
3632 | first_object_linenos.end(), | |
3633 | linenos.begin(), | |
3634 | linenos.end(), | |
3635 | Check_intersection(), | |
3636 | Odr_violation_compare()); | |
3637 | if (!intersection_result.had_intersection()) | |
3638 | { | |
3639 | gold_warning(_("while linking %s: symbol '%s' defined in " | |
3640 | "multiple places (possible ODR violation):"), | |
3641 | output_file_name, demangle(symbol_name).c_str()); | |
3642 | // This only prints one location from each definition, | |
3643 | // which may not be the location we expect to intersect | |
3644 | // with another definition. We could print the whole | |
3645 | // set of locations, but that seems too verbose. | |
71ff8986 | 3646 | fprintf(stderr, _(" %s from %s\n"), |
437ddf0c | 3647 | first_object_canonical_result.c_str(), |
71ff8986 ILT |
3648 | first_object_name.c_str()); |
3649 | fprintf(stderr, _(" %s from %s\n"), | |
437ddf0c | 3650 | second_object_canonical_result.c_str(), |
71ff8986 ILT |
3651 | locs->object->name().c_str()); |
3652 | // Only print one broken pair, to avoid needing to | |
3653 | // compare against a list of the disjoint definition | |
3654 | // locations we've found so far. (If we kept comparing | |
3655 | // against just the first one, we'd get a lot of | |
3656 | // redundant complaints about the second definition | |
3657 | // location.) | |
3658 | break; | |
3659 | } | |
70e654ba ILT |
3660 | } |
3661 | } | |
e4e5049b CS |
3662 | // We only call one_addr2line() in this function, so we can clear its cache. |
3663 | Dwarf_line_info::clear_addr2line_cache(); | |
70e654ba ILT |
3664 | } |
3665 | ||
f6ce93d6 ILT |
3666 | // Warnings functions. |
3667 | ||
3668 | // Add a new warning. | |
3669 | ||
3670 | void | |
2ea97941 | 3671 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, |
cb295612 | 3672 | const std::string& warning) |
f6ce93d6 | 3673 | { |
2ea97941 ILT |
3674 | name = symtab->canonicalize_name(name); |
3675 | this->warnings_[name].set(obj, warning); | |
f6ce93d6 ILT |
3676 | } |
3677 | ||
3678 | // Look through the warnings and mark the symbols for which we should | |
3679 | // warn. This is called during Layout::finalize when we know the | |
3680 | // sources for all the symbols. | |
3681 | ||
3682 | void | |
cb295612 | 3683 | Warnings::note_warnings(Symbol_table* symtab) |
f6ce93d6 ILT |
3684 | { |
3685 | for (Warning_table::iterator p = this->warnings_.begin(); | |
3686 | p != this->warnings_.end(); | |
3687 | ++p) | |
3688 | { | |
3689 | Symbol* sym = symtab->lookup(p->first, NULL); | |
3690 | if (sym != NULL | |
3691 | && sym->source() == Symbol::FROM_OBJECT | |
3692 | && sym->object() == p->second.object) | |
cb295612 | 3693 | sym->set_has_warning(); |
f6ce93d6 ILT |
3694 | } |
3695 | } | |
3696 | ||
3697 | // Issue a warning. This is called when we see a relocation against a | |
3698 | // symbol for which has a warning. | |
3699 | ||
75f2446e | 3700 | template<int size, bool big_endian> |
f6ce93d6 | 3701 | void |
75f2446e ILT |
3702 | Warnings::issue_warning(const Symbol* sym, |
3703 | const Relocate_info<size, big_endian>* relinfo, | |
3704 | size_t relnum, off_t reloffset) const | |
f6ce93d6 | 3705 | { |
a3ad94ed | 3706 | gold_assert(sym->has_warning()); |
9d3b0698 ILT |
3707 | |
3708 | // We don't want to issue a warning for a relocation against the | |
3709 | // symbol in the same object file in which the symbol is defined. | |
3710 | if (sym->object() == relinfo->object) | |
3711 | return; | |
3712 | ||
f6ce93d6 | 3713 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
a3ad94ed | 3714 | gold_assert(p != this->warnings_.end()); |
75f2446e ILT |
3715 | gold_warning_at_location(relinfo, relnum, reloffset, |
3716 | "%s", p->second.text.c_str()); | |
f6ce93d6 ILT |
3717 | } |
3718 | ||
14bfc3f5 ILT |
3719 | // Instantiate the templates we need. We could use the configure |
3720 | // script to restrict this to only the ones needed for implemented | |
3721 | // targets. | |
3722 | ||
c7912668 ILT |
3723 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3724 | template | |
3725 | void | |
3726 | Sized_symbol<32>::allocate_common(Output_data*, Value_type); | |
3727 | #endif | |
3728 | ||
3729 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3730 | template | |
3731 | void | |
3732 | Sized_symbol<64>::allocate_common(Output_data*, Value_type); | |
3733 | #endif | |
3734 | ||
193a53d9 | 3735 | #ifdef HAVE_TARGET_32_LITTLE |
14bfc3f5 ILT |
3736 | template |
3737 | void | |
193a53d9 | 3738 | Symbol_table::add_from_relobj<32, false>( |
6fa2a40b | 3739 | Sized_relobj_file<32, false>* relobj, |
f6ce93d6 | 3740 | const unsigned char* syms, |
14bfc3f5 | 3741 | size_t count, |
d491d34e | 3742 | size_t symndx_offset, |
14bfc3f5 ILT |
3743 | const char* sym_names, |
3744 | size_t sym_name_size, | |
6fa2a40b | 3745 | Sized_relobj_file<32, false>::Symbols* sympointers, |
92de84a6 | 3746 | size_t* defined); |
193a53d9 | 3747 | #endif |
14bfc3f5 | 3748 | |
193a53d9 | 3749 | #ifdef HAVE_TARGET_32_BIG |
14bfc3f5 ILT |
3750 | template |
3751 | void | |
193a53d9 | 3752 | Symbol_table::add_from_relobj<32, true>( |
6fa2a40b | 3753 | Sized_relobj_file<32, true>* relobj, |
f6ce93d6 | 3754 | const unsigned char* syms, |
14bfc3f5 | 3755 | size_t count, |
d491d34e | 3756 | size_t symndx_offset, |
14bfc3f5 ILT |
3757 | const char* sym_names, |
3758 | size_t sym_name_size, | |
6fa2a40b | 3759 | Sized_relobj_file<32, true>::Symbols* sympointers, |
92de84a6 | 3760 | size_t* defined); |
193a53d9 | 3761 | #endif |
14bfc3f5 | 3762 | |
193a53d9 | 3763 | #ifdef HAVE_TARGET_64_LITTLE |
14bfc3f5 ILT |
3764 | template |
3765 | void | |
193a53d9 | 3766 | Symbol_table::add_from_relobj<64, false>( |
6fa2a40b | 3767 | Sized_relobj_file<64, false>* relobj, |
f6ce93d6 | 3768 | const unsigned char* syms, |
14bfc3f5 | 3769 | size_t count, |
d491d34e | 3770 | size_t symndx_offset, |
14bfc3f5 ILT |
3771 | const char* sym_names, |
3772 | size_t sym_name_size, | |
6fa2a40b | 3773 | Sized_relobj_file<64, false>::Symbols* sympointers, |
92de84a6 | 3774 | size_t* defined); |
193a53d9 | 3775 | #endif |
14bfc3f5 | 3776 | |
193a53d9 | 3777 | #ifdef HAVE_TARGET_64_BIG |
14bfc3f5 ILT |
3778 | template |
3779 | void | |
193a53d9 | 3780 | Symbol_table::add_from_relobj<64, true>( |
6fa2a40b | 3781 | Sized_relobj_file<64, true>* relobj, |
f6ce93d6 | 3782 | const unsigned char* syms, |
14bfc3f5 | 3783 | size_t count, |
d491d34e | 3784 | size_t symndx_offset, |
14bfc3f5 ILT |
3785 | const char* sym_names, |
3786 | size_t sym_name_size, | |
6fa2a40b | 3787 | Sized_relobj_file<64, true>::Symbols* sympointers, |
92de84a6 | 3788 | size_t* defined); |
193a53d9 | 3789 | #endif |
14bfc3f5 | 3790 | |
89fc3421 CC |
3791 | #ifdef HAVE_TARGET_32_LITTLE |
3792 | template | |
3793 | Symbol* | |
3794 | Symbol_table::add_from_pluginobj<32, false>( | |
3795 | Sized_pluginobj<32, false>* obj, | |
3796 | const char* name, | |
3797 | const char* ver, | |
3798 | elfcpp::Sym<32, false>* sym); | |
3799 | #endif | |
3800 | ||
3801 | #ifdef HAVE_TARGET_32_BIG | |
3802 | template | |
3803 | Symbol* | |
3804 | Symbol_table::add_from_pluginobj<32, true>( | |
3805 | Sized_pluginobj<32, true>* obj, | |
3806 | const char* name, | |
3807 | const char* ver, | |
3808 | elfcpp::Sym<32, true>* sym); | |
3809 | #endif | |
3810 | ||
3811 | #ifdef HAVE_TARGET_64_LITTLE | |
3812 | template | |
3813 | Symbol* | |
3814 | Symbol_table::add_from_pluginobj<64, false>( | |
3815 | Sized_pluginobj<64, false>* obj, | |
3816 | const char* name, | |
3817 | const char* ver, | |
3818 | elfcpp::Sym<64, false>* sym); | |
3819 | #endif | |
3820 | ||
3821 | #ifdef HAVE_TARGET_64_BIG | |
3822 | template | |
3823 | Symbol* | |
3824 | Symbol_table::add_from_pluginobj<64, true>( | |
3825 | Sized_pluginobj<64, true>* obj, | |
3826 | const char* name, | |
3827 | const char* ver, | |
3828 | elfcpp::Sym<64, true>* sym); | |
3829 | #endif | |
3830 | ||
193a53d9 | 3831 | #ifdef HAVE_TARGET_32_LITTLE |
dbe717ef ILT |
3832 | template |
3833 | void | |
193a53d9 ILT |
3834 | Symbol_table::add_from_dynobj<32, false>( |
3835 | Sized_dynobj<32, false>* dynobj, | |
dbe717ef ILT |
3836 | const unsigned char* syms, |
3837 | size_t count, | |
3838 | const char* sym_names, | |
3839 | size_t sym_name_size, | |
3840 | const unsigned char* versym, | |
3841 | size_t versym_size, | |
92de84a6 | 3842 | const std::vector<const char*>* version_map, |
6fa2a40b | 3843 | Sized_relobj_file<32, false>::Symbols* sympointers, |
92de84a6 | 3844 | size_t* defined); |
193a53d9 | 3845 | #endif |
dbe717ef | 3846 | |
193a53d9 | 3847 | #ifdef HAVE_TARGET_32_BIG |
dbe717ef ILT |
3848 | template |
3849 | void | |
193a53d9 ILT |
3850 | Symbol_table::add_from_dynobj<32, true>( |
3851 | Sized_dynobj<32, true>* dynobj, | |
dbe717ef ILT |
3852 | const unsigned char* syms, |
3853 | size_t count, | |
3854 | const char* sym_names, | |
3855 | size_t sym_name_size, | |
3856 | const unsigned char* versym, | |
3857 | size_t versym_size, | |
92de84a6 | 3858 | const std::vector<const char*>* version_map, |
6fa2a40b | 3859 | Sized_relobj_file<32, true>::Symbols* sympointers, |
92de84a6 | 3860 | size_t* defined); |
193a53d9 | 3861 | #endif |
dbe717ef | 3862 | |
193a53d9 | 3863 | #ifdef HAVE_TARGET_64_LITTLE |
dbe717ef ILT |
3864 | template |
3865 | void | |
193a53d9 ILT |
3866 | Symbol_table::add_from_dynobj<64, false>( |
3867 | Sized_dynobj<64, false>* dynobj, | |
dbe717ef ILT |
3868 | const unsigned char* syms, |
3869 | size_t count, | |
3870 | const char* sym_names, | |
3871 | size_t sym_name_size, | |
3872 | const unsigned char* versym, | |
3873 | size_t versym_size, | |
92de84a6 | 3874 | const std::vector<const char*>* version_map, |
6fa2a40b | 3875 | Sized_relobj_file<64, false>::Symbols* sympointers, |
92de84a6 | 3876 | size_t* defined); |
193a53d9 | 3877 | #endif |
dbe717ef | 3878 | |
193a53d9 | 3879 | #ifdef HAVE_TARGET_64_BIG |
dbe717ef ILT |
3880 | template |
3881 | void | |
193a53d9 ILT |
3882 | Symbol_table::add_from_dynobj<64, true>( |
3883 | Sized_dynobj<64, true>* dynobj, | |
dbe717ef ILT |
3884 | const unsigned char* syms, |
3885 | size_t count, | |
3886 | const char* sym_names, | |
3887 | size_t sym_name_size, | |
3888 | const unsigned char* versym, | |
3889 | size_t versym_size, | |
92de84a6 | 3890 | const std::vector<const char*>* version_map, |
6fa2a40b | 3891 | Sized_relobj_file<64, true>::Symbols* sympointers, |
92de84a6 | 3892 | size_t* defined); |
193a53d9 | 3893 | #endif |
dbe717ef | 3894 | |
cdc29364 CC |
3895 | #ifdef HAVE_TARGET_32_LITTLE |
3896 | template | |
26d3c67d | 3897 | Sized_symbol<32>* |
cdc29364 CC |
3898 | Symbol_table::add_from_incrobj( |
3899 | Object* obj, | |
3900 | const char* name, | |
3901 | const char* ver, | |
3902 | elfcpp::Sym<32, false>* sym); | |
3903 | #endif | |
3904 | ||
3905 | #ifdef HAVE_TARGET_32_BIG | |
3906 | template | |
26d3c67d | 3907 | Sized_symbol<32>* |
cdc29364 CC |
3908 | Symbol_table::add_from_incrobj( |
3909 | Object* obj, | |
3910 | const char* name, | |
3911 | const char* ver, | |
3912 | elfcpp::Sym<32, true>* sym); | |
3913 | #endif | |
3914 | ||
3915 | #ifdef HAVE_TARGET_64_LITTLE | |
3916 | template | |
26d3c67d | 3917 | Sized_symbol<64>* |
cdc29364 CC |
3918 | Symbol_table::add_from_incrobj( |
3919 | Object* obj, | |
3920 | const char* name, | |
3921 | const char* ver, | |
3922 | elfcpp::Sym<64, false>* sym); | |
3923 | #endif | |
3924 | ||
3925 | #ifdef HAVE_TARGET_64_BIG | |
3926 | template | |
26d3c67d | 3927 | Sized_symbol<64>* |
cdc29364 CC |
3928 | Symbol_table::add_from_incrobj( |
3929 | Object* obj, | |
3930 | const char* name, | |
3931 | const char* ver, | |
3932 | elfcpp::Sym<64, true>* sym); | |
3933 | #endif | |
3934 | ||
46fe1623 ILT |
3935 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3936 | template | |
3937 | void | |
fe8718a4 | 3938 | Symbol_table::define_with_copy_reloc<32>( |
fe8718a4 ILT |
3939 | Sized_symbol<32>* sym, |
3940 | Output_data* posd, | |
2ea97941 | 3941 | elfcpp::Elf_types<32>::Elf_Addr value); |
46fe1623 ILT |
3942 | #endif |
3943 | ||
3944 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3945 | template | |
3946 | void | |
fe8718a4 | 3947 | Symbol_table::define_with_copy_reloc<64>( |
fe8718a4 ILT |
3948 | Sized_symbol<64>* sym, |
3949 | Output_data* posd, | |
2ea97941 | 3950 | elfcpp::Elf_types<64>::Elf_Addr value); |
46fe1623 ILT |
3951 | #endif |
3952 | ||
beacaa96 CC |
3953 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3954 | template | |
3955 | void | |
3956 | Sized_symbol<32>::init_output_data(const char* name, const char* version, | |
3957 | Output_data* od, Value_type value, | |
3958 | Size_type symsize, elfcpp::STT type, | |
3959 | elfcpp::STB binding, | |
3960 | elfcpp::STV visibility, | |
3961 | unsigned char nonvis, | |
3962 | bool offset_is_from_end, | |
3963 | bool is_predefined); | |
8d04e81d CC |
3964 | |
3965 | template | |
3966 | void | |
3967 | Sized_symbol<32>::init_constant(const char* name, const char* version, | |
3968 | Value_type value, Size_type symsize, | |
3969 | elfcpp::STT type, elfcpp::STB binding, | |
3970 | elfcpp::STV visibility, unsigned char nonvis, | |
3971 | bool is_predefined); | |
3972 | ||
3973 | template | |
3974 | void | |
3975 | Sized_symbol<32>::init_undefined(const char* name, const char* version, | |
3976 | Value_type value, elfcpp::STT type, | |
3977 | elfcpp::STB binding, elfcpp::STV visibility, | |
3978 | unsigned char nonvis); | |
beacaa96 CC |
3979 | #endif |
3980 | ||
3981 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3982 | template | |
3983 | void | |
3984 | Sized_symbol<64>::init_output_data(const char* name, const char* version, | |
3985 | Output_data* od, Value_type value, | |
3986 | Size_type symsize, elfcpp::STT type, | |
3987 | elfcpp::STB binding, | |
3988 | elfcpp::STV visibility, | |
3989 | unsigned char nonvis, | |
3990 | bool offset_is_from_end, | |
3991 | bool is_predefined); | |
8d04e81d CC |
3992 | |
3993 | template | |
3994 | void | |
3995 | Sized_symbol<64>::init_constant(const char* name, const char* version, | |
3996 | Value_type value, Size_type symsize, | |
3997 | elfcpp::STT type, elfcpp::STB binding, | |
3998 | elfcpp::STV visibility, unsigned char nonvis, | |
3999 | bool is_predefined); | |
4000 | ||
4001 | template | |
4002 | void | |
4003 | Sized_symbol<64>::init_undefined(const char* name, const char* version, | |
4004 | Value_type value, elfcpp::STT type, | |
4005 | elfcpp::STB binding, elfcpp::STV visibility, | |
4006 | unsigned char nonvis); | |
beacaa96 CC |
4007 | #endif |
4008 | ||
75f2446e ILT |
4009 | #ifdef HAVE_TARGET_32_LITTLE |
4010 | template | |
4011 | void | |
4012 | Warnings::issue_warning<32, false>(const Symbol* sym, | |
4013 | const Relocate_info<32, false>* relinfo, | |
4014 | size_t relnum, off_t reloffset) const; | |
4015 | #endif | |
4016 | ||
4017 | #ifdef HAVE_TARGET_32_BIG | |
4018 | template | |
4019 | void | |
4020 | Warnings::issue_warning<32, true>(const Symbol* sym, | |
4021 | const Relocate_info<32, true>* relinfo, | |
4022 | size_t relnum, off_t reloffset) const; | |
4023 | #endif | |
4024 | ||
4025 | #ifdef HAVE_TARGET_64_LITTLE | |
4026 | template | |
4027 | void | |
4028 | Warnings::issue_warning<64, false>(const Symbol* sym, | |
4029 | const Relocate_info<64, false>* relinfo, | |
4030 | size_t relnum, off_t reloffset) const; | |
4031 | #endif | |
4032 | ||
4033 | #ifdef HAVE_TARGET_64_BIG | |
4034 | template | |
4035 | void | |
4036 | Warnings::issue_warning<64, true>(const Symbol* sym, | |
4037 | const Relocate_info<64, true>* relinfo, | |
4038 | size_t relnum, off_t reloffset) const; | |
4039 | #endif | |
4040 | ||
14bfc3f5 | 4041 | } // End namespace gold. |