]>
Commit | Line | Data |
---|---|---|
14bfc3f5 ILT |
1 | // symtab.cc -- the gold symbol table |
2 | ||
0f3b89d8 | 3 | // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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" |
14bfc3f5 ILT |
43 | |
44 | namespace gold | |
45 | { | |
46 | ||
47 | // Class Symbol. | |
48 | ||
ead1e424 ILT |
49 | // Initialize fields in Symbol. This initializes everything except u_ |
50 | // and source_. | |
14bfc3f5 | 51 | |
14bfc3f5 | 52 | void |
2ea97941 ILT |
53 | Symbol::init_fields(const char* name, const char* version, |
54 | elfcpp::STT type, elfcpp::STB binding, | |
55 | elfcpp::STV visibility, unsigned char nonvis) | |
14bfc3f5 | 56 | { |
2ea97941 ILT |
57 | this->name_ = name; |
58 | this->version_ = version; | |
c06b7b0b ILT |
59 | this->symtab_index_ = 0; |
60 | this->dynsym_index_ = 0; | |
0a65a3a7 | 61 | this->got_offsets_.init(); |
880cd20d | 62 | this->plt_offset_ = -1U; |
2ea97941 ILT |
63 | this->type_ = type; |
64 | this->binding_ = binding; | |
65 | this->visibility_ = visibility; | |
66 | this->nonvis_ = nonvis; | |
1564db8d ILT |
67 | this->is_def_ = false; |
68 | this->is_forwarder_ = false; | |
aeddab66 | 69 | this->has_alias_ = false; |
c06b7b0b | 70 | this->needs_dynsym_entry_ = false; |
008db82e | 71 | this->in_reg_ = false; |
ead1e424 | 72 | this->in_dyn_ = false; |
f6ce93d6 | 73 | this->has_warning_ = false; |
46fe1623 | 74 | this->is_copied_from_dynobj_ = false; |
55a93433 | 75 | this->is_forced_local_ = false; |
d491d34e | 76 | this->is_ordinary_shndx_ = false; |
89fc3421 | 77 | this->in_real_elf_ = false; |
880cd20d | 78 | this->is_defined_in_discarded_section_ = false; |
ce279a62 CC |
79 | this->undef_binding_set_ = false; |
80 | this->undef_binding_weak_ = false; | |
ead1e424 ILT |
81 | } |
82 | ||
a2b1aa12 ILT |
83 | // Return the demangled version of the symbol's name, but only |
84 | // if the --demangle flag was set. | |
85 | ||
86 | static std::string | |
2ea97941 | 87 | demangle(const char* name) |
a2b1aa12 | 88 | { |
086a1841 | 89 | if (!parameters->options().do_demangle()) |
2ea97941 | 90 | return name; |
ff541f30 | 91 | |
a2b1aa12 ILT |
92 | // cplus_demangle allocates memory for the result it returns, |
93 | // and returns NULL if the name is already demangled. | |
2ea97941 | 94 | char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS); |
a2b1aa12 | 95 | if (demangled_name == NULL) |
2ea97941 | 96 | return name; |
a2b1aa12 ILT |
97 | |
98 | std::string retval(demangled_name); | |
99 | free(demangled_name); | |
100 | return retval; | |
101 | } | |
102 | ||
103 | std::string | |
104 | Symbol::demangled_name() const | |
105 | { | |
ff541f30 | 106 | return demangle(this->name()); |
a2b1aa12 ILT |
107 | } |
108 | ||
ead1e424 ILT |
109 | // Initialize the fields in the base class Symbol for SYM in OBJECT. |
110 | ||
111 | template<int size, bool big_endian> | |
112 | void | |
2ea97941 | 113 | Symbol::init_base_object(const char* name, const char* version, Object* object, |
f3e9c5c5 ILT |
114 | const elfcpp::Sym<size, big_endian>& sym, |
115 | unsigned int st_shndx, bool is_ordinary) | |
ead1e424 | 116 | { |
2ea97941 | 117 | this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(), |
ead1e424 | 118 | sym.get_st_visibility(), sym.get_st_nonvis()); |
2ea97941 | 119 | this->u_.from_object.object = object; |
d491d34e ILT |
120 | this->u_.from_object.shndx = st_shndx; |
121 | this->is_ordinary_shndx_ = is_ordinary; | |
ead1e424 | 122 | this->source_ = FROM_OBJECT; |
2ea97941 ILT |
123 | this->in_reg_ = !object->is_dynamic(); |
124 | this->in_dyn_ = object->is_dynamic(); | |
125 | this->in_real_elf_ = object->pluginobj() == NULL; | |
14bfc3f5 ILT |
126 | } |
127 | ||
ead1e424 ILT |
128 | // Initialize the fields in the base class Symbol for a symbol defined |
129 | // in an Output_data. | |
130 | ||
131 | void | |
2ea97941 ILT |
132 | Symbol::init_base_output_data(const char* name, const char* version, |
133 | Output_data* od, elfcpp::STT type, | |
134 | elfcpp::STB binding, elfcpp::STV visibility, | |
135 | unsigned char nonvis, bool offset_is_from_end) | |
ead1e424 | 136 | { |
2ea97941 | 137 | this->init_fields(name, version, type, binding, visibility, nonvis); |
ead1e424 | 138 | this->u_.in_output_data.output_data = od; |
2ea97941 | 139 | this->u_.in_output_data.offset_is_from_end = offset_is_from_end; |
ead1e424 | 140 | this->source_ = IN_OUTPUT_DATA; |
008db82e | 141 | this->in_reg_ = true; |
89fc3421 | 142 | this->in_real_elf_ = true; |
ead1e424 ILT |
143 | } |
144 | ||
145 | // Initialize the fields in the base class Symbol for a symbol defined | |
146 | // in an Output_segment. | |
147 | ||
148 | void | |
2ea97941 ILT |
149 | Symbol::init_base_output_segment(const char* name, const char* version, |
150 | Output_segment* os, elfcpp::STT type, | |
151 | elfcpp::STB binding, elfcpp::STV visibility, | |
152 | unsigned char nonvis, | |
153 | Segment_offset_base offset_base) | |
ead1e424 | 154 | { |
2ea97941 | 155 | this->init_fields(name, version, type, binding, visibility, nonvis); |
ead1e424 | 156 | this->u_.in_output_segment.output_segment = os; |
2ea97941 | 157 | this->u_.in_output_segment.offset_base = offset_base; |
ead1e424 | 158 | this->source_ = IN_OUTPUT_SEGMENT; |
008db82e | 159 | this->in_reg_ = true; |
89fc3421 | 160 | this->in_real_elf_ = true; |
ead1e424 ILT |
161 | } |
162 | ||
163 | // Initialize the fields in the base class Symbol for a symbol defined | |
164 | // as a constant. | |
165 | ||
166 | void | |
2ea97941 ILT |
167 | Symbol::init_base_constant(const char* name, const char* version, |
168 | elfcpp::STT type, elfcpp::STB binding, | |
169 | elfcpp::STV visibility, unsigned char nonvis) | |
f3e9c5c5 | 170 | { |
2ea97941 | 171 | this->init_fields(name, version, type, binding, visibility, nonvis); |
f3e9c5c5 ILT |
172 | this->source_ = IS_CONSTANT; |
173 | this->in_reg_ = true; | |
89fc3421 | 174 | this->in_real_elf_ = true; |
f3e9c5c5 ILT |
175 | } |
176 | ||
177 | // Initialize the fields in the base class Symbol for an undefined | |
178 | // symbol. | |
179 | ||
180 | void | |
2ea97941 ILT |
181 | Symbol::init_base_undefined(const char* name, const char* version, |
182 | elfcpp::STT type, elfcpp::STB binding, | |
183 | elfcpp::STV visibility, unsigned char nonvis) | |
ead1e424 | 184 | { |
2ea97941 | 185 | this->init_fields(name, version, type, binding, visibility, nonvis); |
d7ab2a47 | 186 | this->dynsym_index_ = -1U; |
f3e9c5c5 | 187 | this->source_ = IS_UNDEFINED; |
008db82e | 188 | this->in_reg_ = true; |
89fc3421 | 189 | this->in_real_elf_ = true; |
ead1e424 ILT |
190 | } |
191 | ||
c7912668 ILT |
192 | // Allocate a common symbol in the base. |
193 | ||
194 | void | |
195 | Symbol::allocate_base_common(Output_data* od) | |
196 | { | |
197 | gold_assert(this->is_common()); | |
198 | this->source_ = IN_OUTPUT_DATA; | |
199 | this->u_.in_output_data.output_data = od; | |
200 | this->u_.in_output_data.offset_is_from_end = false; | |
201 | } | |
202 | ||
ead1e424 | 203 | // Initialize the fields in Sized_symbol for SYM in OBJECT. |
14bfc3f5 ILT |
204 | |
205 | template<int size> | |
206 | template<bool big_endian> | |
207 | void | |
2ea97941 ILT |
208 | Sized_symbol<size>::init_object(const char* name, const char* version, |
209 | Object* object, | |
f3e9c5c5 ILT |
210 | const elfcpp::Sym<size, big_endian>& sym, |
211 | unsigned int st_shndx, bool is_ordinary) | |
14bfc3f5 | 212 | { |
2ea97941 | 213 | this->init_base_object(name, version, object, sym, st_shndx, is_ordinary); |
14bfc3f5 | 214 | this->value_ = sym.get_st_value(); |
ead1e424 ILT |
215 | this->symsize_ = sym.get_st_size(); |
216 | } | |
217 | ||
218 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
219 | // Output_data. | |
220 | ||
221 | template<int size> | |
222 | void | |
2ea97941 ILT |
223 | Sized_symbol<size>::init_output_data(const char* name, const char* version, |
224 | Output_data* od, Value_type value, | |
225 | Size_type symsize, elfcpp::STT type, | |
226 | elfcpp::STB binding, | |
227 | elfcpp::STV visibility, | |
228 | unsigned char nonvis, | |
229 | bool offset_is_from_end) | |
ead1e424 | 230 | { |
2ea97941 ILT |
231 | this->init_base_output_data(name, version, od, type, binding, visibility, |
232 | nonvis, offset_is_from_end); | |
233 | this->value_ = value; | |
234 | this->symsize_ = symsize; | |
ead1e424 ILT |
235 | } |
236 | ||
237 | // Initialize the fields in Sized_symbol for a symbol defined in an | |
238 | // Output_segment. | |
239 | ||
240 | template<int size> | |
241 | void | |
2ea97941 ILT |
242 | Sized_symbol<size>::init_output_segment(const char* name, const char* version, |
243 | Output_segment* os, Value_type value, | |
244 | Size_type symsize, elfcpp::STT type, | |
245 | elfcpp::STB binding, | |
246 | elfcpp::STV visibility, | |
247 | unsigned char nonvis, | |
248 | Segment_offset_base offset_base) | |
ead1e424 | 249 | { |
2ea97941 ILT |
250 | this->init_base_output_segment(name, version, os, type, binding, visibility, |
251 | nonvis, offset_base); | |
252 | this->value_ = value; | |
253 | this->symsize_ = symsize; | |
ead1e424 ILT |
254 | } |
255 | ||
256 | // Initialize the fields in Sized_symbol for a symbol defined as a | |
257 | // constant. | |
258 | ||
259 | template<int size> | |
260 | void | |
2ea97941 ILT |
261 | Sized_symbol<size>::init_constant(const char* name, const char* version, |
262 | Value_type value, Size_type symsize, | |
263 | elfcpp::STT type, elfcpp::STB binding, | |
264 | elfcpp::STV visibility, unsigned char nonvis) | |
ead1e424 | 265 | { |
2ea97941 ILT |
266 | this->init_base_constant(name, version, type, binding, visibility, nonvis); |
267 | this->value_ = value; | |
268 | this->symsize_ = symsize; | |
14bfc3f5 ILT |
269 | } |
270 | ||
f3e9c5c5 ILT |
271 | // Initialize the fields in Sized_symbol for an undefined symbol. |
272 | ||
273 | template<int size> | |
274 | void | |
2ea97941 ILT |
275 | Sized_symbol<size>::init_undefined(const char* name, const char* version, |
276 | elfcpp::STT type, elfcpp::STB binding, | |
277 | elfcpp::STV visibility, unsigned char nonvis) | |
f3e9c5c5 | 278 | { |
2ea97941 | 279 | this->init_base_undefined(name, version, type, binding, visibility, nonvis); |
f3e9c5c5 ILT |
280 | this->value_ = 0; |
281 | this->symsize_ = 0; | |
282 | } | |
283 | ||
8a5e3e08 ILT |
284 | // Return true if SHNDX represents a common symbol. |
285 | ||
286 | bool | |
2ea97941 | 287 | Symbol::is_common_shndx(unsigned int shndx) |
8a5e3e08 | 288 | { |
2ea97941 ILT |
289 | return (shndx == elfcpp::SHN_COMMON |
290 | || shndx == parameters->target().small_common_shndx() | |
291 | || shndx == parameters->target().large_common_shndx()); | |
8a5e3e08 ILT |
292 | } |
293 | ||
c7912668 ILT |
294 | // Allocate a common symbol. |
295 | ||
296 | template<int size> | |
297 | void | |
2ea97941 | 298 | Sized_symbol<size>::allocate_common(Output_data* od, Value_type value) |
c7912668 ILT |
299 | { |
300 | this->allocate_base_common(od); | |
2ea97941 | 301 | this->value_ = value; |
c7912668 ILT |
302 | } |
303 | ||
c82fbeee CS |
304 | // The ""'s around str ensure str is a string literal, so sizeof works. |
305 | #define strprefix(var, str) (strncmp(var, str, sizeof("" str "") - 1) == 0) | |
306 | ||
436ca963 ILT |
307 | // Return true if this symbol should be added to the dynamic symbol |
308 | // table. | |
309 | ||
310 | inline bool | |
ce97fa81 | 311 | Symbol::should_add_dynsym_entry(Symbol_table* symtab) const |
436ca963 | 312 | { |
badc8139 RÁE |
313 | // If the symbol is only present on plugin files, the plugin decided we |
314 | // don't need it. | |
315 | if (!this->in_real_elf()) | |
316 | return false; | |
317 | ||
436ca963 ILT |
318 | // If the symbol is used by a dynamic relocation, we need to add it. |
319 | if (this->needs_dynsym_entry()) | |
320 | return true; | |
321 | ||
6d03d481 ST |
322 | // If this symbol's section is not added, the symbol need not be added. |
323 | // The section may have been GCed. Note that export_dynamic is being | |
324 | // overridden here. This should not be done for shared objects. | |
325 | if (parameters->options().gc_sections() | |
326 | && !parameters->options().shared() | |
327 | && this->source() == Symbol::FROM_OBJECT | |
328 | && !this->object()->is_dynamic()) | |
329 | { | |
330 | Relobj* relobj = static_cast<Relobj*>(this->object()); | |
331 | bool is_ordinary; | |
2ea97941 ILT |
332 | unsigned int shndx = this->shndx(&is_ordinary); |
333 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF | |
ce97fa81 ST |
334 | && !relobj->is_section_included(shndx) |
335 | && !symtab->is_section_folded(relobj, shndx)) | |
6d03d481 ST |
336 | return false; |
337 | } | |
338 | ||
55a93433 ILT |
339 | // If the symbol was forced local in a version script, do not add it. |
340 | if (this->is_forced_local()) | |
341 | return false; | |
342 | ||
c82fbeee CS |
343 | // If the symbol was forced dynamic in a --dynamic-list file, add it. |
344 | if (parameters->options().in_dynamic_list(this->name())) | |
345 | return true; | |
346 | ||
347 | // If dynamic-list-data was specified, add any STT_OBJECT. | |
348 | if (parameters->options().dynamic_list_data() | |
349 | && !this->is_from_dynobj() | |
350 | && this->type() == elfcpp::STT_OBJECT) | |
351 | return true; | |
352 | ||
353 | // If --dynamic-list-cpp-new was specified, add any new/delete symbol. | |
354 | // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols. | |
355 | if ((parameters->options().dynamic_list_cpp_new() | |
356 | || parameters->options().dynamic_list_cpp_typeinfo()) | |
357 | && !this->is_from_dynobj()) | |
358 | { | |
359 | // TODO(csilvers): We could probably figure out if we're an operator | |
360 | // new/delete or typeinfo without the need to demangle. | |
2ea97941 ILT |
361 | char* demangled_name = cplus_demangle(this->name(), |
362 | DMGL_ANSI | DMGL_PARAMS); | |
363 | if (demangled_name == NULL) | |
c82fbeee CS |
364 | { |
365 | // Not a C++ symbol, so it can't satisfy these flags | |
366 | } | |
367 | else if (parameters->options().dynamic_list_cpp_new() | |
2ea97941 ILT |
368 | && (strprefix(demangled_name, "operator new") |
369 | || strprefix(demangled_name, "operator delete"))) | |
c82fbeee | 370 | { |
2ea97941 | 371 | free(demangled_name); |
c82fbeee CS |
372 | return true; |
373 | } | |
374 | else if (parameters->options().dynamic_list_cpp_typeinfo() | |
2ea97941 ILT |
375 | && (strprefix(demangled_name, "typeinfo name for") |
376 | || strprefix(demangled_name, "typeinfo for"))) | |
c82fbeee | 377 | { |
2ea97941 | 378 | free(demangled_name); |
c82fbeee CS |
379 | return true; |
380 | } | |
381 | else | |
2ea97941 | 382 | free(demangled_name); |
c82fbeee CS |
383 | } |
384 | ||
436ca963 ILT |
385 | // If exporting all symbols or building a shared library, |
386 | // and the symbol is defined in a regular object and is | |
387 | // externally visible, we need to add it. | |
8851ecca | 388 | if ((parameters->options().export_dynamic() || parameters->options().shared()) |
436ca963 ILT |
389 | && !this->is_from_dynobj() |
390 | && this->is_externally_visible()) | |
391 | return true; | |
392 | ||
393 | return false; | |
394 | } | |
395 | ||
b3b74ddc ILT |
396 | // Return true if the final value of this symbol is known at link |
397 | // time. | |
398 | ||
399 | bool | |
400 | Symbol::final_value_is_known() const | |
401 | { | |
402 | // If we are not generating an executable, then no final values are | |
403 | // known, since they will change at runtime. | |
374ad285 ILT |
404 | if (parameters->options().output_is_position_independent() |
405 | || parameters->options().relocatable()) | |
b3b74ddc ILT |
406 | return false; |
407 | ||
f3e9c5c5 ILT |
408 | // If the symbol is not from an object file, and is not undefined, |
409 | // then it is defined, and known. | |
b3b74ddc | 410 | if (this->source_ != FROM_OBJECT) |
f3e9c5c5 ILT |
411 | { |
412 | if (this->source_ != IS_UNDEFINED) | |
413 | return true; | |
414 | } | |
415 | else | |
416 | { | |
417 | // If the symbol is from a dynamic object, then the final value | |
418 | // is not known. | |
419 | if (this->object()->is_dynamic()) | |
420 | return false; | |
b3b74ddc | 421 | |
f3e9c5c5 ILT |
422 | // If the symbol is not undefined (it is defined or common), |
423 | // then the final value is known. | |
424 | if (!this->is_undefined()) | |
425 | return true; | |
426 | } | |
b3b74ddc ILT |
427 | |
428 | // If the symbol is undefined, then whether the final value is known | |
429 | // depends on whether we are doing a static link. If we are doing a | |
430 | // dynamic link, then the final value could be filled in at runtime. | |
431 | // This could reasonably be the case for a weak undefined symbol. | |
432 | return parameters->doing_static_link(); | |
433 | } | |
434 | ||
77e65537 | 435 | // Return the output section where this symbol is defined. |
a445fddf | 436 | |
77e65537 ILT |
437 | Output_section* |
438 | Symbol::output_section() const | |
a445fddf ILT |
439 | { |
440 | switch (this->source_) | |
441 | { | |
442 | case FROM_OBJECT: | |
77e65537 | 443 | { |
2ea97941 ILT |
444 | unsigned int shndx = this->u_.from_object.shndx; |
445 | if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_) | |
77e65537 ILT |
446 | { |
447 | gold_assert(!this->u_.from_object.object->is_dynamic()); | |
89fc3421 | 448 | gold_assert(this->u_.from_object.object->pluginobj() == NULL); |
77e65537 | 449 | Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object); |
2ea97941 | 450 | return relobj->output_section(shndx); |
77e65537 ILT |
451 | } |
452 | return NULL; | |
453 | } | |
454 | ||
a445fddf | 455 | case IN_OUTPUT_DATA: |
77e65537 ILT |
456 | return this->u_.in_output_data.output_data->output_section(); |
457 | ||
a445fddf | 458 | case IN_OUTPUT_SEGMENT: |
f3e9c5c5 ILT |
459 | case IS_CONSTANT: |
460 | case IS_UNDEFINED: | |
77e65537 ILT |
461 | return NULL; |
462 | ||
463 | default: | |
464 | gold_unreachable(); | |
465 | } | |
466 | } | |
467 | ||
468 | // Set the symbol's output section. This is used for symbols defined | |
469 | // in scripts. This should only be called after the symbol table has | |
470 | // been finalized. | |
471 | ||
472 | void | |
473 | Symbol::set_output_section(Output_section* os) | |
474 | { | |
475 | switch (this->source_) | |
476 | { | |
477 | case FROM_OBJECT: | |
478 | case IN_OUTPUT_DATA: | |
479 | gold_assert(this->output_section() == os); | |
480 | break; | |
f3e9c5c5 | 481 | case IS_CONSTANT: |
77e65537 ILT |
482 | this->source_ = IN_OUTPUT_DATA; |
483 | this->u_.in_output_data.output_data = os; | |
484 | this->u_.in_output_data.offset_is_from_end = false; | |
485 | break; | |
486 | case IN_OUTPUT_SEGMENT: | |
f3e9c5c5 | 487 | case IS_UNDEFINED: |
a445fddf ILT |
488 | default: |
489 | gold_unreachable(); | |
490 | } | |
491 | } | |
492 | ||
14bfc3f5 ILT |
493 | // Class Symbol_table. |
494 | ||
09124467 | 495 | Symbol_table::Symbol_table(unsigned int count, |
2ea97941 | 496 | const Version_script_info& version_script) |
6d013333 | 497 | : saw_undefined_(0), offset_(0), table_(count), namepool_(), |
8a5e3e08 ILT |
498 | forwarders_(), commons_(), tls_commons_(), small_commons_(), |
499 | large_commons_(), forced_locals_(), warnings_(), | |
2ea97941 | 500 | version_script_(version_script), gc_(NULL), icf_(NULL) |
14bfc3f5 | 501 | { |
6d013333 | 502 | namepool_.reserve(count); |
14bfc3f5 ILT |
503 | } |
504 | ||
505 | Symbol_table::~Symbol_table() | |
506 | { | |
507 | } | |
508 | ||
ad8f37d1 ILT |
509 | // The symbol table key equality function. This is called with |
510 | // Stringpool keys. | |
14bfc3f5 | 511 | |
ad8f37d1 | 512 | inline bool |
14bfc3f5 ILT |
513 | Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1, |
514 | const Symbol_table_key& k2) const | |
515 | { | |
516 | return k1.first == k2.first && k1.second == k2.second; | |
517 | } | |
518 | ||
ef15dade | 519 | bool |
2ea97941 | 520 | Symbol_table::is_section_folded(Object* obj, unsigned int shndx) const |
ef15dade | 521 | { |
032ce4e9 | 522 | return (parameters->options().icf_enabled() |
2ea97941 | 523 | && this->icf_->is_section_folded(obj, shndx)); |
ef15dade ST |
524 | } |
525 | ||
6d03d481 ST |
526 | // For symbols that have been listed with -u option, add them to the |
527 | // work list to avoid gc'ing them. | |
528 | ||
529 | void | |
88a4108b | 530 | Symbol_table::gc_mark_undef_symbols(Layout* layout) |
6d03d481 ST |
531 | { |
532 | for (options::String_set::const_iterator p = | |
533 | parameters->options().undefined_begin(); | |
534 | p != parameters->options().undefined_end(); | |
535 | ++p) | |
536 | { | |
2ea97941 ILT |
537 | const char* name = p->c_str(); |
538 | Symbol* sym = this->lookup(name); | |
ca09d69a | 539 | gold_assert(sym != NULL); |
6d03d481 ST |
540 | if (sym->source() == Symbol::FROM_OBJECT |
541 | && !sym->object()->is_dynamic()) | |
542 | { | |
543 | Relobj* obj = static_cast<Relobj*>(sym->object()); | |
544 | bool is_ordinary; | |
2ea97941 | 545 | unsigned int shndx = sym->shndx(&is_ordinary); |
6d03d481 ST |
546 | if (is_ordinary) |
547 | { | |
548 | gold_assert(this->gc_ != NULL); | |
2ea97941 | 549 | this->gc_->worklist().push(Section_id(obj, shndx)); |
6d03d481 ST |
550 | } |
551 | } | |
552 | } | |
88a4108b ILT |
553 | |
554 | for (Script_options::referenced_const_iterator p = | |
555 | layout->script_options()->referenced_begin(); | |
556 | p != layout->script_options()->referenced_end(); | |
557 | ++p) | |
558 | { | |
559 | Symbol* sym = this->lookup(p->c_str()); | |
560 | gold_assert(sym != NULL); | |
561 | if (sym->source() == Symbol::FROM_OBJECT | |
562 | && !sym->object()->is_dynamic()) | |
563 | { | |
564 | Relobj* obj = static_cast<Relobj*>(sym->object()); | |
565 | bool is_ordinary; | |
566 | unsigned int shndx = sym->shndx(&is_ordinary); | |
567 | if (is_ordinary) | |
568 | { | |
569 | gold_assert(this->gc_ != NULL); | |
570 | this->gc_->worklist().push(Section_id(obj, shndx)); | |
571 | } | |
572 | } | |
573 | } | |
6d03d481 ST |
574 | } |
575 | ||
576 | void | |
577 | Symbol_table::gc_mark_symbol_for_shlib(Symbol* sym) | |
578 | { | |
579 | if (!sym->is_from_dynobj() | |
580 | && sym->is_externally_visible()) | |
581 | { | |
582 | //Add the object and section to the work list. | |
583 | Relobj* obj = static_cast<Relobj*>(sym->object()); | |
584 | bool is_ordinary; | |
2ea97941 ILT |
585 | unsigned int shndx = sym->shndx(&is_ordinary); |
586 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF) | |
6d03d481 ST |
587 | { |
588 | gold_assert(this->gc_!= NULL); | |
2ea97941 | 589 | this->gc_->worklist().push(Section_id(obj, shndx)); |
6d03d481 ST |
590 | } |
591 | } | |
592 | } | |
593 | ||
594 | // When doing garbage collection, keep symbols that have been seen in | |
595 | // dynamic objects. | |
596 | inline void | |
597 | Symbol_table::gc_mark_dyn_syms(Symbol* sym) | |
598 | { | |
599 | if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT | |
600 | && !sym->object()->is_dynamic()) | |
601 | { | |
ca09d69a | 602 | Relobj* obj = static_cast<Relobj*>(sym->object()); |
6d03d481 | 603 | bool is_ordinary; |
2ea97941 ILT |
604 | unsigned int shndx = sym->shndx(&is_ordinary); |
605 | if (is_ordinary && shndx != elfcpp::SHN_UNDEF) | |
6d03d481 ST |
606 | { |
607 | gold_assert(this->gc_ != NULL); | |
2ea97941 | 608 | this->gc_->worklist().push(Section_id(obj, shndx)); |
6d03d481 ST |
609 | } |
610 | } | |
611 | } | |
612 | ||
dd8670e5 | 613 | // Make TO a symbol which forwards to FROM. |
14bfc3f5 ILT |
614 | |
615 | void | |
616 | Symbol_table::make_forwarder(Symbol* from, Symbol* to) | |
617 | { | |
a3ad94ed ILT |
618 | gold_assert(from != to); |
619 | gold_assert(!from->is_forwarder() && !to->is_forwarder()); | |
14bfc3f5 ILT |
620 | this->forwarders_[from] = to; |
621 | from->set_forwarder(); | |
622 | } | |
623 | ||
61ba1cf9 ILT |
624 | // Resolve the forwards from FROM, returning the real symbol. |
625 | ||
14bfc3f5 | 626 | Symbol* |
c06b7b0b | 627 | Symbol_table::resolve_forwards(const Symbol* from) const |
14bfc3f5 | 628 | { |
a3ad94ed | 629 | gold_assert(from->is_forwarder()); |
c06b7b0b | 630 | Unordered_map<const Symbol*, Symbol*>::const_iterator p = |
14bfc3f5 | 631 | this->forwarders_.find(from); |
a3ad94ed | 632 | gold_assert(p != this->forwarders_.end()); |
14bfc3f5 ILT |
633 | return p->second; |
634 | } | |
635 | ||
61ba1cf9 ILT |
636 | // Look up a symbol by name. |
637 | ||
638 | Symbol* | |
2ea97941 | 639 | Symbol_table::lookup(const char* name, const char* version) const |
61ba1cf9 | 640 | { |
f0641a0b | 641 | Stringpool::Key name_key; |
2ea97941 ILT |
642 | name = this->namepool_.find(name, &name_key); |
643 | if (name == NULL) | |
61ba1cf9 | 644 | return NULL; |
f0641a0b ILT |
645 | |
646 | Stringpool::Key version_key = 0; | |
2ea97941 | 647 | if (version != NULL) |
61ba1cf9 | 648 | { |
2ea97941 ILT |
649 | version = this->namepool_.find(version, &version_key); |
650 | if (version == NULL) | |
61ba1cf9 ILT |
651 | return NULL; |
652 | } | |
653 | ||
f0641a0b | 654 | Symbol_table_key key(name_key, version_key); |
61ba1cf9 ILT |
655 | Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key); |
656 | if (p == this->table_.end()) | |
657 | return NULL; | |
658 | return p->second; | |
659 | } | |
660 | ||
14bfc3f5 ILT |
661 | // Resolve a Symbol with another Symbol. This is only used in the |
662 | // unusual case where there are references to both an unversioned | |
663 | // symbol and a symbol with a version, and we then discover that that | |
1564db8d ILT |
664 | // version is the default version. Because this is unusual, we do |
665 | // this the slow way, by converting back to an ELF symbol. | |
14bfc3f5 | 666 | |
1564db8d | 667 | template<int size, bool big_endian> |
14bfc3f5 | 668 | void |
95d14cd3 | 669 | Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from) |
14bfc3f5 | 670 | { |
1564db8d ILT |
671 | unsigned char buf[elfcpp::Elf_sizes<size>::sym_size]; |
672 | elfcpp::Sym_write<size, big_endian> esym(buf); | |
d491d34e | 673 | // We don't bother to set the st_name or the st_shndx field. |
1564db8d ILT |
674 | esym.put_st_value(from->value()); |
675 | esym.put_st_size(from->symsize()); | |
676 | esym.put_st_info(from->binding(), from->type()); | |
ead1e424 | 677 | esym.put_st_other(from->visibility(), from->nonvis()); |
d491d34e | 678 | bool is_ordinary; |
2ea97941 ILT |
679 | unsigned int shndx = from->shndx(&is_ordinary); |
680 | this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(), | |
95d14cd3 | 681 | from->version()); |
1ebd95fd ILT |
682 | if (from->in_reg()) |
683 | to->set_in_reg(); | |
684 | if (from->in_dyn()) | |
685 | to->set_in_dyn(); | |
6d03d481 ST |
686 | if (parameters->options().gc_sections()) |
687 | this->gc_mark_dyn_syms(to); | |
14bfc3f5 ILT |
688 | } |
689 | ||
0602e05a ILT |
690 | // Record that a symbol is forced to be local by a version script or |
691 | // by visibility. | |
55a93433 ILT |
692 | |
693 | void | |
694 | Symbol_table::force_local(Symbol* sym) | |
695 | { | |
696 | if (!sym->is_defined() && !sym->is_common()) | |
697 | return; | |
698 | if (sym->is_forced_local()) | |
699 | { | |
700 | // We already got this one. | |
701 | return; | |
702 | } | |
703 | sym->set_is_forced_local(); | |
704 | this->forced_locals_.push_back(sym); | |
705 | } | |
706 | ||
0864d551 ILT |
707 | // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This |
708 | // is only called for undefined symbols, when at least one --wrap | |
709 | // option was used. | |
710 | ||
711 | const char* | |
2ea97941 | 712 | Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key) |
0864d551 ILT |
713 | { |
714 | // For some targets, we need to ignore a specific character when | |
715 | // wrapping, and add it back later. | |
716 | char prefix = '\0'; | |
2ea97941 | 717 | if (name[0] == parameters->target().wrap_char()) |
0864d551 | 718 | { |
2ea97941 ILT |
719 | prefix = name[0]; |
720 | ++name; | |
0864d551 ILT |
721 | } |
722 | ||
2ea97941 | 723 | if (parameters->options().is_wrap(name)) |
0864d551 ILT |
724 | { |
725 | // Turn NAME into __wrap_NAME. | |
726 | std::string s; | |
727 | if (prefix != '\0') | |
728 | s += prefix; | |
729 | s += "__wrap_"; | |
2ea97941 | 730 | s += name; |
0864d551 ILT |
731 | |
732 | // This will give us both the old and new name in NAMEPOOL_, but | |
733 | // that is OK. Only the versions we need will wind up in the | |
734 | // real string table in the output file. | |
735 | return this->namepool_.add(s.c_str(), true, name_key); | |
736 | } | |
737 | ||
738 | const char* const real_prefix = "__real_"; | |
739 | const size_t real_prefix_length = strlen(real_prefix); | |
2ea97941 ILT |
740 | if (strncmp(name, real_prefix, real_prefix_length) == 0 |
741 | && parameters->options().is_wrap(name + real_prefix_length)) | |
0864d551 ILT |
742 | { |
743 | // Turn __real_NAME into NAME. | |
744 | std::string s; | |
745 | if (prefix != '\0') | |
746 | s += prefix; | |
2ea97941 | 747 | s += name + real_prefix_length; |
0864d551 ILT |
748 | return this->namepool_.add(s.c_str(), true, name_key); |
749 | } | |
750 | ||
2ea97941 | 751 | return name; |
0864d551 ILT |
752 | } |
753 | ||
8c500701 ILT |
754 | // This is called when we see a symbol NAME/VERSION, and the symbol |
755 | // already exists in the symbol table, and VERSION is marked as being | |
756 | // the default version. SYM is the NAME/VERSION symbol we just added. | |
757 | // DEFAULT_IS_NEW is true if this is the first time we have seen the | |
758 | // symbol NAME/NULL. PDEF points to the entry for NAME/NULL. | |
759 | ||
760 | template<int size, bool big_endian> | |
761 | void | |
762 | Symbol_table::define_default_version(Sized_symbol<size>* sym, | |
763 | bool default_is_new, | |
764 | Symbol_table_type::iterator pdef) | |
765 | { | |
766 | if (default_is_new) | |
767 | { | |
768 | // This is the first time we have seen NAME/NULL. Make | |
769 | // NAME/NULL point to NAME/VERSION, and mark SYM as the default | |
770 | // version. | |
771 | pdef->second = sym; | |
772 | sym->set_is_default(); | |
773 | } | |
774 | else if (pdef->second == sym) | |
775 | { | |
776 | // NAME/NULL already points to NAME/VERSION. Don't mark the | |
777 | // symbol as the default if it is not already the default. | |
778 | } | |
779 | else | |
780 | { | |
781 | // This is the unfortunate case where we already have entries | |
782 | // for both NAME/VERSION and NAME/NULL. We now see a symbol | |
783 | // NAME/VERSION where VERSION is the default version. We have | |
784 | // already resolved this new symbol with the existing | |
785 | // NAME/VERSION symbol. | |
786 | ||
787 | // It's possible that NAME/NULL and NAME/VERSION are both | |
788 | // defined in regular objects. This can only happen if one | |
789 | // object file defines foo and another defines foo@@ver. This | |
790 | // is somewhat obscure, but we call it a multiple definition | |
791 | // error. | |
792 | ||
793 | // It's possible that NAME/NULL actually has a version, in which | |
794 | // case it won't be the same as VERSION. This happens with | |
795 | // ver_test_7.so in the testsuite for the symbol t2_2. We see | |
796 | // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We | |
797 | // then see an unadorned t2_2 in an object file and give it | |
798 | // version VER1 from the version script. This looks like a | |
799 | // default definition for VER1, so it looks like we should merge | |
800 | // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's | |
801 | // not obvious that this is an error, either. So we just punt. | |
802 | ||
803 | // If one of the symbols has non-default visibility, and the | |
804 | // other is defined in a shared object, then they are different | |
805 | // symbols. | |
806 | ||
807 | // Otherwise, we just resolve the symbols as though they were | |
808 | // the same. | |
809 | ||
810 | if (pdef->second->version() != NULL) | |
811 | gold_assert(pdef->second->version() != sym->version()); | |
812 | else if (sym->visibility() != elfcpp::STV_DEFAULT | |
813 | && pdef->second->is_from_dynobj()) | |
814 | ; | |
815 | else if (pdef->second->visibility() != elfcpp::STV_DEFAULT | |
816 | && sym->is_from_dynobj()) | |
817 | ; | |
818 | else | |
819 | { | |
820 | const Sized_symbol<size>* symdef; | |
821 | symdef = this->get_sized_symbol<size>(pdef->second); | |
822 | Symbol_table::resolve<size, big_endian>(sym, symdef); | |
823 | this->make_forwarder(pdef->second, sym); | |
824 | pdef->second = sym; | |
825 | sym->set_is_default(); | |
826 | } | |
827 | } | |
828 | } | |
829 | ||
14bfc3f5 ILT |
830 | // Add one symbol from OBJECT to the symbol table. NAME is symbol |
831 | // name and VERSION is the version; both are canonicalized. DEF is | |
d491d34e ILT |
832 | // whether this is the default version. ST_SHNDX is the symbol's |
833 | // section index; IS_ORDINARY is whether this is a normal section | |
834 | // rather than a special code. | |
14bfc3f5 | 835 | |
8781f709 ILT |
836 | // If IS_DEFAULT_VERSION is true, then this is the definition of a |
837 | // default version of a symbol. That means that any lookup of | |
838 | // NAME/NULL and any lookup of NAME/VERSION should always return the | |
839 | // same symbol. This is obvious for references, but in particular we | |
840 | // want to do this for definitions: overriding NAME/NULL should also | |
841 | // override NAME/VERSION. If we don't do that, it would be very hard | |
842 | // to override functions in a shared library which uses versioning. | |
14bfc3f5 ILT |
843 | |
844 | // We implement this by simply making both entries in the hash table | |
845 | // point to the same Symbol structure. That is easy enough if this is | |
846 | // the first time we see NAME/NULL or NAME/VERSION, but it is possible | |
847 | // that we have seen both already, in which case they will both have | |
848 | // independent entries in the symbol table. We can't simply change | |
849 | // the symbol table entry, because we have pointers to the entries | |
850 | // attached to the object files. So we mark the entry attached to the | |
851 | // object file as a forwarder, and record it in the forwarders_ map. | |
852 | // Note that entries in the hash table will never be marked as | |
853 | // forwarders. | |
70e654ba | 854 | // |
d491d34e ILT |
855 | // ORIG_ST_SHNDX and ST_SHNDX are almost always the same. |
856 | // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF | |
857 | // for a special section code. ST_SHNDX may be modified if the symbol | |
858 | // is defined in a section being discarded. | |
14bfc3f5 ILT |
859 | |
860 | template<int size, bool big_endian> | |
aeddab66 | 861 | Sized_symbol<size>* |
2ea97941 | 862 | Symbol_table::add_from_object(Object* object, |
ca09d69a | 863 | const char* name, |
f0641a0b | 864 | Stringpool::Key name_key, |
ca09d69a | 865 | const char* version, |
f0641a0b | 866 | Stringpool::Key version_key, |
8781f709 | 867 | bool is_default_version, |
70e654ba | 868 | const elfcpp::Sym<size, big_endian>& sym, |
d491d34e ILT |
869 | unsigned int st_shndx, |
870 | bool is_ordinary, | |
871 | unsigned int orig_st_shndx) | |
14bfc3f5 | 872 | { |
c5818ff1 | 873 | // Print a message if this symbol is being traced. |
2ea97941 | 874 | if (parameters->options().is_trace_symbol(name)) |
c5818ff1 | 875 | { |
d491d34e | 876 | if (orig_st_shndx == elfcpp::SHN_UNDEF) |
2ea97941 | 877 | gold_info(_("%s: reference to %s"), object->name().c_str(), name); |
c5818ff1 | 878 | else |
2ea97941 | 879 | gold_info(_("%s: definition of %s"), object->name().c_str(), name); |
c5818ff1 CC |
880 | } |
881 | ||
0864d551 ILT |
882 | // For an undefined symbol, we may need to adjust the name using |
883 | // --wrap. | |
d491d34e | 884 | if (orig_st_shndx == elfcpp::SHN_UNDEF |
c5818ff1 | 885 | && parameters->options().any_wrap()) |
0864d551 | 886 | { |
2ea97941 ILT |
887 | const char* wrap_name = this->wrap_symbol(name, &name_key); |
888 | if (wrap_name != name) | |
0864d551 ILT |
889 | { |
890 | // If we see a reference to malloc with version GLIBC_2.0, | |
891 | // and we turn it into a reference to __wrap_malloc, then we | |
892 | // discard the version number. Otherwise the user would be | |
893 | // required to specify the correct version for | |
894 | // __wrap_malloc. | |
2ea97941 | 895 | version = NULL; |
0864d551 | 896 | version_key = 0; |
2ea97941 | 897 | name = wrap_name; |
0864d551 ILT |
898 | } |
899 | } | |
900 | ||
14bfc3f5 ILT |
901 | Symbol* const snull = NULL; |
902 | std::pair<typename Symbol_table_type::iterator, bool> ins = | |
f0641a0b ILT |
903 | this->table_.insert(std::make_pair(std::make_pair(name_key, version_key), |
904 | snull)); | |
14bfc3f5 | 905 | |
8781f709 | 906 | std::pair<typename Symbol_table_type::iterator, bool> insdefault = |
14bfc3f5 | 907 | std::make_pair(this->table_.end(), false); |
8781f709 | 908 | if (is_default_version) |
14bfc3f5 | 909 | { |
f0641a0b | 910 | const Stringpool::Key vnull_key = 0; |
8781f709 ILT |
911 | insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key, |
912 | vnull_key), | |
913 | snull)); | |
14bfc3f5 ILT |
914 | } |
915 | ||
916 | // ins.first: an iterator, which is a pointer to a pair. | |
917 | // ins.first->first: the key (a pair of name and version). | |
918 | // ins.first->second: the value (Symbol*). | |
919 | // ins.second: true if new entry was inserted, false if not. | |
920 | ||
1564db8d | 921 | Sized_symbol<size>* ret; |
ead1e424 ILT |
922 | bool was_undefined; |
923 | bool was_common; | |
14bfc3f5 ILT |
924 | if (!ins.second) |
925 | { | |
926 | // We already have an entry for NAME/VERSION. | |
7d1a9ebb | 927 | ret = this->get_sized_symbol<size>(ins.first->second); |
a3ad94ed | 928 | gold_assert(ret != NULL); |
ead1e424 ILT |
929 | |
930 | was_undefined = ret->is_undefined(); | |
931 | was_common = ret->is_common(); | |
932 | ||
2ea97941 ILT |
933 | this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object, |
934 | version); | |
6d03d481 ST |
935 | if (parameters->options().gc_sections()) |
936 | this->gc_mark_dyn_syms(ret); | |
14bfc3f5 | 937 | |
8781f709 ILT |
938 | if (is_default_version) |
939 | this->define_default_version<size, big_endian>(ret, insdefault.second, | |
940 | insdefault.first); | |
14bfc3f5 ILT |
941 | } |
942 | else | |
943 | { | |
944 | // This is the first time we have seen NAME/VERSION. | |
a3ad94ed | 945 | gold_assert(ins.first->second == NULL); |
ead1e424 | 946 | |
8781f709 | 947 | if (is_default_version && !insdefault.second) |
14bfc3f5 | 948 | { |
14b31740 ILT |
949 | // We already have an entry for NAME/NULL. If we override |
950 | // it, then change it to NAME/VERSION. | |
8781f709 | 951 | ret = this->get_sized_symbol<size>(insdefault.first->second); |
18e6b24e ILT |
952 | |
953 | was_undefined = ret->is_undefined(); | |
954 | was_common = ret->is_common(); | |
955 | ||
2ea97941 ILT |
956 | this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object, |
957 | version); | |
6d03d481 ST |
958 | if (parameters->options().gc_sections()) |
959 | this->gc_mark_dyn_syms(ret); | |
14bfc3f5 ILT |
960 | ins.first->second = ret; |
961 | } | |
962 | else | |
963 | { | |
18e6b24e ILT |
964 | was_undefined = false; |
965 | was_common = false; | |
966 | ||
f6ce93d6 | 967 | Sized_target<size, big_endian>* target = |
029ba973 | 968 | parameters->sized_target<size, big_endian>(); |
1564db8d ILT |
969 | if (!target->has_make_symbol()) |
970 | ret = new Sized_symbol<size>(); | |
971 | else | |
14bfc3f5 | 972 | { |
1564db8d ILT |
973 | ret = target->make_symbol(); |
974 | if (ret == NULL) | |
14bfc3f5 ILT |
975 | { |
976 | // This means that we don't want a symbol table | |
977 | // entry after all. | |
8781f709 | 978 | if (!is_default_version) |
14bfc3f5 ILT |
979 | this->table_.erase(ins.first); |
980 | else | |
981 | { | |
8781f709 ILT |
982 | this->table_.erase(insdefault.first); |
983 | // Inserting INSDEFAULT invalidated INS. | |
f0641a0b ILT |
984 | this->table_.erase(std::make_pair(name_key, |
985 | version_key)); | |
14bfc3f5 ILT |
986 | } |
987 | return NULL; | |
988 | } | |
989 | } | |
14bfc3f5 | 990 | |
2ea97941 | 991 | ret->init_object(name, version, object, sym, st_shndx, is_ordinary); |
1564db8d | 992 | |
14bfc3f5 | 993 | ins.first->second = ret; |
8781f709 | 994 | if (is_default_version) |
14bfc3f5 ILT |
995 | { |
996 | // This is the first time we have seen NAME/NULL. Point | |
997 | // it at the new entry for NAME/VERSION. | |
8781f709 ILT |
998 | gold_assert(insdefault.second); |
999 | insdefault.first->second = ret; | |
14bfc3f5 ILT |
1000 | } |
1001 | } | |
8c500701 | 1002 | |
8781f709 | 1003 | if (is_default_version) |
8c500701 | 1004 | ret->set_is_default(); |
14bfc3f5 ILT |
1005 | } |
1006 | ||
ead1e424 ILT |
1007 | // Record every time we see a new undefined symbol, to speed up |
1008 | // archive groups. | |
1009 | if (!was_undefined && ret->is_undefined()) | |
0f3b89d8 ILT |
1010 | { |
1011 | ++this->saw_undefined_; | |
1012 | if (parameters->options().has_plugins()) | |
1013 | parameters->options().plugins()->new_undefined_symbol(ret); | |
1014 | } | |
ead1e424 ILT |
1015 | |
1016 | // Keep track of common symbols, to speed up common symbol | |
1017 | // allocation. | |
1018 | if (!was_common && ret->is_common()) | |
155a0dd7 | 1019 | { |
8a5e3e08 | 1020 | if (ret->type() == elfcpp::STT_TLS) |
155a0dd7 | 1021 | this->tls_commons_.push_back(ret); |
8a5e3e08 ILT |
1022 | else if (!is_ordinary |
1023 | && st_shndx == parameters->target().small_common_shndx()) | |
1024 | this->small_commons_.push_back(ret); | |
1025 | else if (!is_ordinary | |
1026 | && st_shndx == parameters->target().large_common_shndx()) | |
1027 | this->large_commons_.push_back(ret); | |
1028 | else | |
1029 | this->commons_.push_back(ret); | |
155a0dd7 | 1030 | } |
ead1e424 | 1031 | |
0602e05a ILT |
1032 | // If we're not doing a relocatable link, then any symbol with |
1033 | // hidden or internal visibility is local. | |
1034 | if ((ret->visibility() == elfcpp::STV_HIDDEN | |
1035 | || ret->visibility() == elfcpp::STV_INTERNAL) | |
1036 | && (ret->binding() == elfcpp::STB_GLOBAL | |
adcf2816 | 1037 | || ret->binding() == elfcpp::STB_GNU_UNIQUE |
0602e05a ILT |
1038 | || ret->binding() == elfcpp::STB_WEAK) |
1039 | && !parameters->options().relocatable()) | |
1040 | this->force_local(ret); | |
1041 | ||
14bfc3f5 ILT |
1042 | return ret; |
1043 | } | |
1044 | ||
f6ce93d6 | 1045 | // Add all the symbols in a relocatable object to the hash table. |
14bfc3f5 ILT |
1046 | |
1047 | template<int size, bool big_endian> | |
1048 | void | |
dbe717ef ILT |
1049 | Symbol_table::add_from_relobj( |
1050 | Sized_relobj<size, big_endian>* relobj, | |
f6ce93d6 | 1051 | const unsigned char* syms, |
14bfc3f5 | 1052 | size_t count, |
d491d34e | 1053 | size_t symndx_offset, |
14bfc3f5 ILT |
1054 | const char* sym_names, |
1055 | size_t sym_name_size, | |
92de84a6 | 1056 | typename Sized_relobj<size, big_endian>::Symbols* sympointers, |
ca09d69a | 1057 | size_t* defined) |
14bfc3f5 | 1058 | { |
92de84a6 ILT |
1059 | *defined = 0; |
1060 | ||
8851ecca | 1061 | gold_assert(size == parameters->target().get_size()); |
14bfc3f5 | 1062 | |
a783673b ILT |
1063 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
1064 | ||
88dd47ac ILT |
1065 | const bool just_symbols = relobj->just_symbols(); |
1066 | ||
f6ce93d6 | 1067 | const unsigned char* p = syms; |
a783673b | 1068 | for (size_t i = 0; i < count; ++i, p += sym_size) |
14bfc3f5 | 1069 | { |
92de84a6 ILT |
1070 | (*sympointers)[i] = NULL; |
1071 | ||
14bfc3f5 ILT |
1072 | elfcpp::Sym<size, big_endian> sym(p); |
1073 | ||
d491d34e | 1074 | unsigned int st_name = sym.get_st_name(); |
14bfc3f5 ILT |
1075 | if (st_name >= sym_name_size) |
1076 | { | |
75f2446e ILT |
1077 | relobj->error(_("bad global symbol name offset %u at %zu"), |
1078 | st_name, i); | |
1079 | continue; | |
14bfc3f5 ILT |
1080 | } |
1081 | ||
2ea97941 | 1082 | const char* name = sym_names + st_name; |
dbe717ef | 1083 | |
d491d34e ILT |
1084 | bool is_ordinary; |
1085 | unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset, | |
1086 | sym.get_st_shndx(), | |
1087 | &is_ordinary); | |
1088 | unsigned int orig_st_shndx = st_shndx; | |
1089 | if (!is_ordinary) | |
1090 | orig_st_shndx = elfcpp::SHN_UNDEF; | |
1091 | ||
92de84a6 ILT |
1092 | if (st_shndx != elfcpp::SHN_UNDEF) |
1093 | ++*defined; | |
1094 | ||
a783673b ILT |
1095 | // A symbol defined in a section which we are not including must |
1096 | // be treated as an undefined symbol. | |
880cd20d | 1097 | bool is_defined_in_discarded_section = false; |
a783673b | 1098 | if (st_shndx != elfcpp::SHN_UNDEF |
d491d34e | 1099 | && is_ordinary |
ce97fa81 ST |
1100 | && !relobj->is_section_included(st_shndx) |
1101 | && !this->is_section_folded(relobj, st_shndx)) | |
880cd20d ILT |
1102 | { |
1103 | st_shndx = elfcpp::SHN_UNDEF; | |
1104 | is_defined_in_discarded_section = true; | |
1105 | } | |
a783673b | 1106 | |
14bfc3f5 ILT |
1107 | // In an object file, an '@' in the name separates the symbol |
1108 | // name from the version name. If there are two '@' characters, | |
1109 | // this is the default version. | |
2ea97941 | 1110 | const char* ver = strchr(name, '@'); |
057ead22 | 1111 | Stringpool::Key ver_key = 0; |
09124467 | 1112 | int namelen = 0; |
8781f709 ILT |
1113 | // IS_DEFAULT_VERSION: is the version default? |
1114 | // IS_FORCED_LOCAL: is the symbol forced local? | |
1115 | bool is_default_version = false; | |
1116 | bool is_forced_local = false; | |
09124467 ILT |
1117 | |
1118 | if (ver != NULL) | |
1119 | { | |
1120 | // The symbol name is of the form foo@VERSION or foo@@VERSION | |
2ea97941 | 1121 | namelen = ver - name; |
09124467 ILT |
1122 | ++ver; |
1123 | if (*ver == '@') | |
1124 | { | |
8781f709 | 1125 | is_default_version = true; |
09124467 ILT |
1126 | ++ver; |
1127 | } | |
057ead22 | 1128 | ver = this->namepool_.add(ver, true, &ver_key); |
09124467 | 1129 | } |
5871526f ILT |
1130 | // We don't want to assign a version to an undefined symbol, |
1131 | // even if it is listed in the version script. FIXME: What | |
1132 | // about a common symbol? | |
057ead22 ILT |
1133 | else |
1134 | { | |
2ea97941 | 1135 | namelen = strlen(name); |
057ead22 ILT |
1136 | if (!this->version_script_.empty() |
1137 | && st_shndx != elfcpp::SHN_UNDEF) | |
1138 | { | |
1139 | // The symbol name did not have a version, but the | |
1140 | // version script may assign a version anyway. | |
2ea97941 | 1141 | std::string version; |
98e090bd ILT |
1142 | bool is_global; |
1143 | if (this->version_script_.get_symbol_version(name, &version, | |
1144 | &is_global)) | |
057ead22 | 1145 | { |
98e090bd ILT |
1146 | if (!is_global) |
1147 | is_forced_local = true; | |
1148 | else if (!version.empty()) | |
057ead22 | 1149 | { |
2ea97941 ILT |
1150 | ver = this->namepool_.add_with_length(version.c_str(), |
1151 | version.length(), | |
057ead22 ILT |
1152 | true, |
1153 | &ver_key); | |
8781f709 | 1154 | is_default_version = true; |
057ead22 ILT |
1155 | } |
1156 | } | |
057ead22 ILT |
1157 | } |
1158 | } | |
14bfc3f5 | 1159 | |
d491d34e ILT |
1160 | elfcpp::Sym<size, big_endian>* psym = &sym; |
1161 | unsigned char symbuf[sym_size]; | |
1162 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
88dd47ac ILT |
1163 | if (just_symbols) |
1164 | { | |
d491d34e | 1165 | memcpy(symbuf, p, sym_size); |
88dd47ac | 1166 | elfcpp::Sym_write<size, big_endian> sw(symbuf); |
d491d34e | 1167 | if (orig_st_shndx != elfcpp::SHN_UNDEF && is_ordinary) |
88dd47ac ILT |
1168 | { |
1169 | // Symbol values in object files are section relative. | |
1170 | // This is normally what we want, but since here we are | |
1171 | // converting the symbol to absolute we need to add the | |
1172 | // section address. The section address in an object | |
1173 | // file is normally zero, but people can use a linker | |
1174 | // script to change it. | |
d491d34e ILT |
1175 | sw.put_st_value(sym.get_st_value() |
1176 | + relobj->section_address(orig_st_shndx)); | |
88dd47ac | 1177 | } |
d491d34e ILT |
1178 | st_shndx = elfcpp::SHN_ABS; |
1179 | is_ordinary = false; | |
88dd47ac ILT |
1180 | psym = &sym2; |
1181 | } | |
1182 | ||
65514900 | 1183 | // Fix up visibility if object has no-export set. |
1c74fab0 ILT |
1184 | if (relobj->no_export() |
1185 | && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary)) | |
65514900 CC |
1186 | { |
1187 | // We may have copied symbol already above. | |
1188 | if (psym != &sym2) | |
1189 | { | |
1190 | memcpy(symbuf, p, sym_size); | |
1191 | psym = &sym2; | |
1192 | } | |
1193 | ||
1194 | elfcpp::STV visibility = sym2.get_st_visibility(); | |
1195 | if (visibility == elfcpp::STV_DEFAULT | |
1196 | || visibility == elfcpp::STV_PROTECTED) | |
1197 | { | |
1198 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
1199 | unsigned char nonvis = sym2.get_st_nonvis(); | |
1200 | sw.put_st_other(elfcpp::STV_HIDDEN, nonvis); | |
1201 | } | |
1202 | } | |
1203 | ||
057ead22 | 1204 | Stringpool::Key name_key; |
2ea97941 | 1205 | name = this->namepool_.add_with_length(name, namelen, true, |
057ead22 ILT |
1206 | &name_key); |
1207 | ||
aeddab66 | 1208 | Sized_symbol<size>* res; |
2ea97941 | 1209 | res = this->add_from_object(relobj, name, name_key, ver, ver_key, |
8781f709 ILT |
1210 | is_default_version, *psym, st_shndx, |
1211 | is_ordinary, orig_st_shndx); | |
6d03d481 ST |
1212 | |
1213 | // If building a shared library using garbage collection, do not | |
1214 | // treat externally visible symbols as garbage. | |
1215 | if (parameters->options().gc_sections() | |
1216 | && parameters->options().shared()) | |
1217 | this->gc_mark_symbol_for_shlib(res); | |
f0641a0b | 1218 | |
8781f709 | 1219 | if (is_forced_local) |
057ead22 | 1220 | this->force_local(res); |
14bfc3f5 | 1221 | |
880cd20d ILT |
1222 | if (is_defined_in_discarded_section) |
1223 | res->set_is_defined_in_discarded_section(); | |
1224 | ||
730cdc88 | 1225 | (*sympointers)[i] = res; |
14bfc3f5 ILT |
1226 | } |
1227 | } | |
1228 | ||
89fc3421 CC |
1229 | // Add a symbol from a plugin-claimed file. |
1230 | ||
1231 | template<int size, bool big_endian> | |
1232 | Symbol* | |
1233 | Symbol_table::add_from_pluginobj( | |
1234 | Sized_pluginobj<size, big_endian>* obj, | |
2ea97941 | 1235 | const char* name, |
89fc3421 CC |
1236 | const char* ver, |
1237 | elfcpp::Sym<size, big_endian>* sym) | |
1238 | { | |
1239 | unsigned int st_shndx = sym->get_st_shndx(); | |
24998053 | 1240 | bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE; |
89fc3421 CC |
1241 | |
1242 | Stringpool::Key ver_key = 0; | |
8781f709 ILT |
1243 | bool is_default_version = false; |
1244 | bool is_forced_local = false; | |
89fc3421 CC |
1245 | |
1246 | if (ver != NULL) | |
1247 | { | |
1248 | ver = this->namepool_.add(ver, true, &ver_key); | |
1249 | } | |
1250 | // We don't want to assign a version to an undefined symbol, | |
1251 | // even if it is listed in the version script. FIXME: What | |
1252 | // about a common symbol? | |
1253 | else | |
1254 | { | |
1255 | if (!this->version_script_.empty() | |
1256 | && st_shndx != elfcpp::SHN_UNDEF) | |
1257 | { | |
1258 | // The symbol name did not have a version, but the | |
1259 | // version script may assign a version anyway. | |
2ea97941 | 1260 | std::string version; |
98e090bd ILT |
1261 | bool is_global; |
1262 | if (this->version_script_.get_symbol_version(name, &version, | |
1263 | &is_global)) | |
89fc3421 | 1264 | { |
98e090bd ILT |
1265 | if (!is_global) |
1266 | is_forced_local = true; | |
1267 | else if (!version.empty()) | |
89fc3421 | 1268 | { |
2ea97941 ILT |
1269 | ver = this->namepool_.add_with_length(version.c_str(), |
1270 | version.length(), | |
89fc3421 CC |
1271 | true, |
1272 | &ver_key); | |
8781f709 | 1273 | is_default_version = true; |
89fc3421 CC |
1274 | } |
1275 | } | |
89fc3421 CC |
1276 | } |
1277 | } | |
1278 | ||
1279 | Stringpool::Key name_key; | |
2ea97941 | 1280 | name = this->namepool_.add(name, true, &name_key); |
89fc3421 CC |
1281 | |
1282 | Sized_symbol<size>* res; | |
2ea97941 | 1283 | res = this->add_from_object(obj, name, name_key, ver, ver_key, |
8781f709 ILT |
1284 | is_default_version, *sym, st_shndx, |
1285 | is_ordinary, st_shndx); | |
89fc3421 | 1286 | |
8781f709 | 1287 | if (is_forced_local) |
0602e05a | 1288 | this->force_local(res); |
89fc3421 CC |
1289 | |
1290 | return res; | |
1291 | } | |
1292 | ||
dbe717ef ILT |
1293 | // Add all the symbols in a dynamic object to the hash table. |
1294 | ||
1295 | template<int size, bool big_endian> | |
1296 | void | |
1297 | Symbol_table::add_from_dynobj( | |
1298 | Sized_dynobj<size, big_endian>* dynobj, | |
1299 | const unsigned char* syms, | |
1300 | size_t count, | |
1301 | const char* sym_names, | |
1302 | size_t sym_name_size, | |
1303 | const unsigned char* versym, | |
1304 | size_t versym_size, | |
92de84a6 ILT |
1305 | const std::vector<const char*>* version_map, |
1306 | typename Sized_relobj<size, big_endian>::Symbols* sympointers, | |
1307 | size_t* defined) | |
dbe717ef | 1308 | { |
92de84a6 ILT |
1309 | *defined = 0; |
1310 | ||
8851ecca | 1311 | gold_assert(size == parameters->target().get_size()); |
dbe717ef | 1312 | |
88dd47ac ILT |
1313 | if (dynobj->just_symbols()) |
1314 | { | |
1315 | gold_error(_("--just-symbols does not make sense with a shared object")); | |
1316 | return; | |
1317 | } | |
1318 | ||
dbe717ef ILT |
1319 | if (versym != NULL && versym_size / 2 < count) |
1320 | { | |
75f2446e ILT |
1321 | dynobj->error(_("too few symbol versions")); |
1322 | return; | |
dbe717ef ILT |
1323 | } |
1324 | ||
1325 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1326 | ||
aeddab66 ILT |
1327 | // We keep a list of all STT_OBJECT symbols, so that we can resolve |
1328 | // weak aliases. This is necessary because if the dynamic object | |
1329 | // provides the same variable under two names, one of which is a | |
1330 | // weak definition, and the regular object refers to the weak | |
1331 | // definition, we have to put both the weak definition and the | |
1332 | // strong definition into the dynamic symbol table. Given a weak | |
1333 | // definition, the only way that we can find the corresponding | |
1334 | // strong definition, if any, is to search the symbol table. | |
1335 | std::vector<Sized_symbol<size>*> object_symbols; | |
1336 | ||
dbe717ef ILT |
1337 | const unsigned char* p = syms; |
1338 | const unsigned char* vs = versym; | |
1339 | for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2) | |
1340 | { | |
1341 | elfcpp::Sym<size, big_endian> sym(p); | |
1342 | ||
92de84a6 ILT |
1343 | if (sympointers != NULL) |
1344 | (*sympointers)[i] = NULL; | |
1345 | ||
65778909 ILT |
1346 | // Ignore symbols with local binding or that have |
1347 | // internal or hidden visibility. | |
1348 | if (sym.get_st_bind() == elfcpp::STB_LOCAL | |
1349 | || sym.get_st_visibility() == elfcpp::STV_INTERNAL | |
1350 | || sym.get_st_visibility() == elfcpp::STV_HIDDEN) | |
dbe717ef ILT |
1351 | continue; |
1352 | ||
8bdcdf2c ILT |
1353 | // A protected symbol in a shared library must be treated as a |
1354 | // normal symbol when viewed from outside the shared library. | |
1355 | // Implement this by overriding the visibility here. | |
1356 | elfcpp::Sym<size, big_endian>* psym = &sym; | |
1357 | unsigned char symbuf[sym_size]; | |
1358 | elfcpp::Sym<size, big_endian> sym2(symbuf); | |
1359 | if (sym.get_st_visibility() == elfcpp::STV_PROTECTED) | |
1360 | { | |
1361 | memcpy(symbuf, p, sym_size); | |
1362 | elfcpp::Sym_write<size, big_endian> sw(symbuf); | |
1363 | sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis()); | |
1364 | psym = &sym2; | |
1365 | } | |
1366 | ||
1367 | unsigned int st_name = psym->get_st_name(); | |
dbe717ef ILT |
1368 | if (st_name >= sym_name_size) |
1369 | { | |
75f2446e ILT |
1370 | dynobj->error(_("bad symbol name offset %u at %zu"), |
1371 | st_name, i); | |
1372 | continue; | |
dbe717ef ILT |
1373 | } |
1374 | ||
2ea97941 | 1375 | const char* name = sym_names + st_name; |
dbe717ef | 1376 | |
d491d34e | 1377 | bool is_ordinary; |
8bdcdf2c | 1378 | unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(), |
d491d34e ILT |
1379 | &is_ordinary); |
1380 | ||
92de84a6 ILT |
1381 | if (st_shndx != elfcpp::SHN_UNDEF) |
1382 | ++*defined; | |
1383 | ||
aeddab66 ILT |
1384 | Sized_symbol<size>* res; |
1385 | ||
dbe717ef ILT |
1386 | if (versym == NULL) |
1387 | { | |
1388 | Stringpool::Key name_key; | |
2ea97941 ILT |
1389 | name = this->namepool_.add(name, true, &name_key); |
1390 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, | |
8bdcdf2c | 1391 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1392 | st_shndx); |
dbe717ef | 1393 | } |
aeddab66 ILT |
1394 | else |
1395 | { | |
1396 | // Read the version information. | |
dbe717ef | 1397 | |
aeddab66 | 1398 | unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs); |
dbe717ef | 1399 | |
aeddab66 ILT |
1400 | bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0; |
1401 | v &= elfcpp::VERSYM_VERSION; | |
dbe717ef | 1402 | |
aeddab66 ILT |
1403 | // The Sun documentation says that V can be VER_NDX_LOCAL, |
1404 | // or VER_NDX_GLOBAL, or a version index. The meaning of | |
1405 | // VER_NDX_LOCAL is defined as "Symbol has local scope." | |
1406 | // The old GNU linker will happily generate VER_NDX_LOCAL | |
1407 | // for an undefined symbol. I don't know what the Sun | |
1408 | // linker will generate. | |
dbe717ef | 1409 | |
aeddab66 | 1410 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
d491d34e | 1411 | && st_shndx != elfcpp::SHN_UNDEF) |
aeddab66 ILT |
1412 | { |
1413 | // This symbol should not be visible outside the object. | |
1414 | continue; | |
1415 | } | |
64707334 | 1416 | |
aeddab66 ILT |
1417 | // At this point we are definitely going to add this symbol. |
1418 | Stringpool::Key name_key; | |
2ea97941 | 1419 | name = this->namepool_.add(name, true, &name_key); |
dbe717ef | 1420 | |
aeddab66 ILT |
1421 | if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL) |
1422 | || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL)) | |
1423 | { | |
1424 | // This symbol does not have a version. | |
2ea97941 | 1425 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
8bdcdf2c | 1426 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1427 | st_shndx); |
aeddab66 ILT |
1428 | } |
1429 | else | |
1430 | { | |
1431 | if (v >= version_map->size()) | |
1432 | { | |
1433 | dynobj->error(_("versym for symbol %zu out of range: %u"), | |
1434 | i, v); | |
1435 | continue; | |
1436 | } | |
dbe717ef | 1437 | |
2ea97941 ILT |
1438 | const char* version = (*version_map)[v]; |
1439 | if (version == NULL) | |
aeddab66 ILT |
1440 | { |
1441 | dynobj->error(_("versym for symbol %zu has no name: %u"), | |
1442 | i, v); | |
1443 | continue; | |
1444 | } | |
dbe717ef | 1445 | |
aeddab66 | 1446 | Stringpool::Key version_key; |
2ea97941 | 1447 | version = this->namepool_.add(version, true, &version_key); |
aeddab66 ILT |
1448 | |
1449 | // If this is an absolute symbol, and the version name | |
1450 | // and symbol name are the same, then this is the | |
1451 | // version definition symbol. These symbols exist to | |
1452 | // support using -u to pull in particular versions. We | |
1453 | // do not want to record a version for them. | |
d491d34e ILT |
1454 | if (st_shndx == elfcpp::SHN_ABS |
1455 | && !is_ordinary | |
aeddab66 | 1456 | && name_key == version_key) |
2ea97941 | 1457 | res = this->add_from_object(dynobj, name, name_key, NULL, 0, |
8bdcdf2c | 1458 | false, *psym, st_shndx, is_ordinary, |
d491d34e | 1459 | st_shndx); |
aeddab66 ILT |
1460 | else |
1461 | { | |
8781f709 ILT |
1462 | const bool is_default_version = |
1463 | !hidden && st_shndx != elfcpp::SHN_UNDEF; | |
2ea97941 | 1464 | res = this->add_from_object(dynobj, name, name_key, version, |
8781f709 ILT |
1465 | version_key, is_default_version, |
1466 | *psym, st_shndx, | |
d491d34e | 1467 | is_ordinary, st_shndx); |
aeddab66 ILT |
1468 | } |
1469 | } | |
dbe717ef ILT |
1470 | } |
1471 | ||
99a37bfd | 1472 | // Note that it is possible that RES was overridden by an |
a4bb589a | 1473 | // earlier object, in which case it can't be aliased here. |
d491d34e ILT |
1474 | if (st_shndx != elfcpp::SHN_UNDEF |
1475 | && is_ordinary | |
8bdcdf2c | 1476 | && psym->get_st_type() == elfcpp::STT_OBJECT |
99a37bfd ILT |
1477 | && res->source() == Symbol::FROM_OBJECT |
1478 | && res->object() == dynobj) | |
aeddab66 | 1479 | object_symbols.push_back(res); |
92de84a6 ILT |
1480 | |
1481 | if (sympointers != NULL) | |
1482 | (*sympointers)[i] = res; | |
aeddab66 ILT |
1483 | } |
1484 | ||
1485 | this->record_weak_aliases(&object_symbols); | |
1486 | } | |
1487 | ||
1488 | // This is used to sort weak aliases. We sort them first by section | |
1489 | // index, then by offset, then by weak ahead of strong. | |
1490 | ||
1491 | template<int size> | |
1492 | class Weak_alias_sorter | |
1493 | { | |
1494 | public: | |
1495 | bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const; | |
1496 | }; | |
1497 | ||
1498 | template<int size> | |
1499 | bool | |
1500 | Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1, | |
1501 | const Sized_symbol<size>* s2) const | |
1502 | { | |
d491d34e ILT |
1503 | bool is_ordinary; |
1504 | unsigned int s1_shndx = s1->shndx(&is_ordinary); | |
1505 | gold_assert(is_ordinary); | |
1506 | unsigned int s2_shndx = s2->shndx(&is_ordinary); | |
1507 | gold_assert(is_ordinary); | |
1508 | if (s1_shndx != s2_shndx) | |
1509 | return s1_shndx < s2_shndx; | |
1510 | ||
aeddab66 ILT |
1511 | if (s1->value() != s2->value()) |
1512 | return s1->value() < s2->value(); | |
1513 | if (s1->binding() != s2->binding()) | |
1514 | { | |
1515 | if (s1->binding() == elfcpp::STB_WEAK) | |
1516 | return true; | |
1517 | if (s2->binding() == elfcpp::STB_WEAK) | |
1518 | return false; | |
1519 | } | |
1520 | return std::string(s1->name()) < std::string(s2->name()); | |
1521 | } | |
dbe717ef | 1522 | |
aeddab66 ILT |
1523 | // SYMBOLS is a list of object symbols from a dynamic object. Look |
1524 | // for any weak aliases, and record them so that if we add the weak | |
1525 | // alias to the dynamic symbol table, we also add the corresponding | |
1526 | // strong symbol. | |
dbe717ef | 1527 | |
aeddab66 ILT |
1528 | template<int size> |
1529 | void | |
1530 | Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols) | |
1531 | { | |
1532 | // Sort the vector by section index, then by offset, then by weak | |
1533 | // ahead of strong. | |
1534 | std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>()); | |
1535 | ||
1536 | // Walk through the vector. For each weak definition, record | |
1537 | // aliases. | |
1538 | for (typename std::vector<Sized_symbol<size>*>::const_iterator p = | |
1539 | symbols->begin(); | |
1540 | p != symbols->end(); | |
1541 | ++p) | |
1542 | { | |
1543 | if ((*p)->binding() != elfcpp::STB_WEAK) | |
1544 | continue; | |
1545 | ||
1546 | // Build a circular list of weak aliases. Each symbol points to | |
1547 | // the next one in the circular list. | |
1548 | ||
1549 | Sized_symbol<size>* from_sym = *p; | |
1550 | typename std::vector<Sized_symbol<size>*>::const_iterator q; | |
1551 | for (q = p + 1; q != symbols->end(); ++q) | |
dbe717ef | 1552 | { |
d491d34e ILT |
1553 | bool dummy; |
1554 | if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy) | |
aeddab66 ILT |
1555 | || (*q)->value() != from_sym->value()) |
1556 | break; | |
1557 | ||
1558 | this->weak_aliases_[from_sym] = *q; | |
1559 | from_sym->set_has_alias(); | |
1560 | from_sym = *q; | |
dbe717ef ILT |
1561 | } |
1562 | ||
aeddab66 ILT |
1563 | if (from_sym != *p) |
1564 | { | |
1565 | this->weak_aliases_[from_sym] = *p; | |
1566 | from_sym->set_has_alias(); | |
1567 | } | |
dbe717ef | 1568 | |
aeddab66 | 1569 | p = q - 1; |
dbe717ef ILT |
1570 | } |
1571 | } | |
1572 | ||
ead1e424 ILT |
1573 | // Create and return a specially defined symbol. If ONLY_IF_REF is |
1574 | // true, then only create the symbol if there is a reference to it. | |
86f2e683 | 1575 | // If this does not return NULL, it sets *POLDSYM to the existing |
8c500701 ILT |
1576 | // symbol if there is one. This sets *RESOLVE_OLDSYM if we should |
1577 | // resolve the newly created symbol to the old one. This | |
1578 | // canonicalizes *PNAME and *PVERSION. | |
ead1e424 ILT |
1579 | |
1580 | template<int size, bool big_endian> | |
1581 | Sized_symbol<size>* | |
9b07f471 ILT |
1582 | Symbol_table::define_special_symbol(const char** pname, const char** pversion, |
1583 | bool only_if_ref, | |
8c500701 | 1584 | Sized_symbol<size>** poldsym, |
ca09d69a | 1585 | bool* resolve_oldsym) |
ead1e424 | 1586 | { |
8c500701 | 1587 | *resolve_oldsym = false; |
ead1e424 | 1588 | |
55a93433 ILT |
1589 | // If the caller didn't give us a version, see if we get one from |
1590 | // the version script. | |
057ead22 | 1591 | std::string v; |
8c500701 | 1592 | bool is_default_version = false; |
55a93433 ILT |
1593 | if (*pversion == NULL) |
1594 | { | |
98e090bd ILT |
1595 | bool is_global; |
1596 | if (this->version_script_.get_symbol_version(*pname, &v, &is_global)) | |
057ead22 | 1597 | { |
98e090bd ILT |
1598 | if (is_global && !v.empty()) |
1599 | { | |
1600 | *pversion = v.c_str(); | |
1601 | // If we get the version from a version script, then we | |
1602 | // are also the default version. | |
1603 | is_default_version = true; | |
1604 | } | |
057ead22 | 1605 | } |
55a93433 ILT |
1606 | } |
1607 | ||
8c500701 ILT |
1608 | Symbol* oldsym; |
1609 | Sized_symbol<size>* sym; | |
1610 | ||
1611 | bool add_to_table = false; | |
1612 | typename Symbol_table_type::iterator add_loc = this->table_.end(); | |
1613 | bool add_def_to_table = false; | |
1614 | typename Symbol_table_type::iterator add_def_loc = this->table_.end(); | |
1615 | ||
ead1e424 ILT |
1616 | if (only_if_ref) |
1617 | { | |
306d9ef0 | 1618 | oldsym = this->lookup(*pname, *pversion); |
8c500701 ILT |
1619 | if (oldsym == NULL && is_default_version) |
1620 | oldsym = this->lookup(*pname, NULL); | |
f6ce93d6 | 1621 | if (oldsym == NULL || !oldsym->is_undefined()) |
ead1e424 | 1622 | return NULL; |
306d9ef0 ILT |
1623 | |
1624 | *pname = oldsym->name(); | |
8c500701 ILT |
1625 | if (!is_default_version) |
1626 | *pversion = oldsym->version(); | |
ead1e424 ILT |
1627 | } |
1628 | else | |
1629 | { | |
14b31740 | 1630 | // Canonicalize NAME and VERSION. |
f0641a0b | 1631 | Stringpool::Key name_key; |
cfd73a4e | 1632 | *pname = this->namepool_.add(*pname, true, &name_key); |
ead1e424 | 1633 | |
14b31740 | 1634 | Stringpool::Key version_key = 0; |
306d9ef0 | 1635 | if (*pversion != NULL) |
cfd73a4e | 1636 | *pversion = this->namepool_.add(*pversion, true, &version_key); |
14b31740 | 1637 | |
ead1e424 | 1638 | Symbol* const snull = NULL; |
ead1e424 | 1639 | std::pair<typename Symbol_table_type::iterator, bool> ins = |
14b31740 ILT |
1640 | this->table_.insert(std::make_pair(std::make_pair(name_key, |
1641 | version_key), | |
ead1e424 ILT |
1642 | snull)); |
1643 | ||
8781f709 | 1644 | std::pair<typename Symbol_table_type::iterator, bool> insdefault = |
8c500701 ILT |
1645 | std::make_pair(this->table_.end(), false); |
1646 | if (is_default_version) | |
1647 | { | |
1648 | const Stringpool::Key vnull = 0; | |
8781f709 ILT |
1649 | insdefault = |
1650 | this->table_.insert(std::make_pair(std::make_pair(name_key, | |
1651 | vnull), | |
1652 | snull)); | |
8c500701 ILT |
1653 | } |
1654 | ||
ead1e424 ILT |
1655 | if (!ins.second) |
1656 | { | |
14b31740 | 1657 | // We already have a symbol table entry for NAME/VERSION. |
ead1e424 | 1658 | oldsym = ins.first->second; |
a3ad94ed | 1659 | gold_assert(oldsym != NULL); |
8c500701 ILT |
1660 | |
1661 | if (is_default_version) | |
1662 | { | |
1663 | Sized_symbol<size>* soldsym = | |
1664 | this->get_sized_symbol<size>(oldsym); | |
1665 | this->define_default_version<size, big_endian>(soldsym, | |
8781f709 ILT |
1666 | insdefault.second, |
1667 | insdefault.first); | |
8c500701 | 1668 | } |
ead1e424 ILT |
1669 | } |
1670 | else | |
1671 | { | |
1672 | // We haven't seen this symbol before. | |
a3ad94ed | 1673 | gold_assert(ins.first->second == NULL); |
8c500701 ILT |
1674 | |
1675 | add_to_table = true; | |
1676 | add_loc = ins.first; | |
1677 | ||
8781f709 | 1678 | if (is_default_version && !insdefault.second) |
8c500701 ILT |
1679 | { |
1680 | // We are adding NAME/VERSION, and it is the default | |
1681 | // version. We already have an entry for NAME/NULL. | |
8781f709 | 1682 | oldsym = insdefault.first->second; |
8c500701 ILT |
1683 | *resolve_oldsym = true; |
1684 | } | |
1685 | else | |
1686 | { | |
1687 | oldsym = NULL; | |
1688 | ||
1689 | if (is_default_version) | |
1690 | { | |
1691 | add_def_to_table = true; | |
8781f709 | 1692 | add_def_loc = insdefault.first; |
8c500701 ILT |
1693 | } |
1694 | } | |
ead1e424 ILT |
1695 | } |
1696 | } | |
1697 | ||
8851ecca ILT |
1698 | const Target& target = parameters->target(); |
1699 | if (!target.has_make_symbol()) | |
86f2e683 ILT |
1700 | sym = new Sized_symbol<size>(); |
1701 | else | |
ead1e424 | 1702 | { |
029ba973 ILT |
1703 | Sized_target<size, big_endian>* sized_target = |
1704 | parameters->sized_target<size, big_endian>(); | |
86f2e683 ILT |
1705 | sym = sized_target->make_symbol(); |
1706 | if (sym == NULL) | |
1707 | return NULL; | |
1708 | } | |
ead1e424 | 1709 | |
86f2e683 ILT |
1710 | if (add_to_table) |
1711 | add_loc->second = sym; | |
1712 | else | |
1713 | gold_assert(oldsym != NULL); | |
ead1e424 | 1714 | |
8c500701 ILT |
1715 | if (add_def_to_table) |
1716 | add_def_loc->second = sym; | |
1717 | ||
7d1a9ebb | 1718 | *poldsym = this->get_sized_symbol<size>(oldsym); |
ead1e424 ILT |
1719 | |
1720 | return sym; | |
1721 | } | |
1722 | ||
1723 | // Define a symbol based on an Output_data. | |
1724 | ||
14b31740 | 1725 | Symbol* |
2ea97941 ILT |
1726 | Symbol_table::define_in_output_data(const char* name, |
1727 | const char* version, | |
99fff23b | 1728 | Defined defined, |
9b07f471 | 1729 | Output_data* od, |
2ea97941 ILT |
1730 | uint64_t value, |
1731 | uint64_t symsize, | |
9b07f471 ILT |
1732 | elfcpp::STT type, |
1733 | elfcpp::STB binding, | |
ead1e424 ILT |
1734 | elfcpp::STV visibility, |
1735 | unsigned char nonvis, | |
2ea97941 | 1736 | bool offset_is_from_end, |
ead1e424 ILT |
1737 | bool only_if_ref) |
1738 | { | |
8851ecca | 1739 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
1740 | { |
1741 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 1742 | return this->do_define_in_output_data<32>(name, version, defined, od, |
2ea97941 | 1743 | value, symsize, type, binding, |
86f2e683 | 1744 | visibility, nonvis, |
2ea97941 | 1745 | offset_is_from_end, |
86f2e683 ILT |
1746 | only_if_ref); |
1747 | #else | |
1748 | gold_unreachable(); | |
1749 | #endif | |
1750 | } | |
8851ecca | 1751 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
1752 | { |
1753 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 1754 | return this->do_define_in_output_data<64>(name, version, defined, od, |
2ea97941 | 1755 | value, symsize, type, binding, |
86f2e683 | 1756 | visibility, nonvis, |
2ea97941 | 1757 | offset_is_from_end, |
86f2e683 ILT |
1758 | only_if_ref); |
1759 | #else | |
1760 | gold_unreachable(); | |
1761 | #endif | |
1762 | } | |
ead1e424 | 1763 | else |
a3ad94ed | 1764 | gold_unreachable(); |
ead1e424 ILT |
1765 | } |
1766 | ||
1767 | // Define a symbol in an Output_data, sized version. | |
1768 | ||
1769 | template<int size> | |
14b31740 | 1770 | Sized_symbol<size>* |
ead1e424 | 1771 | Symbol_table::do_define_in_output_data( |
2ea97941 ILT |
1772 | const char* name, |
1773 | const char* version, | |
99fff23b | 1774 | Defined defined, |
ead1e424 | 1775 | Output_data* od, |
2ea97941 ILT |
1776 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
1777 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
1778 | elfcpp::STT type, |
1779 | elfcpp::STB binding, | |
1780 | elfcpp::STV visibility, | |
1781 | unsigned char nonvis, | |
2ea97941 | 1782 | bool offset_is_from_end, |
ead1e424 ILT |
1783 | bool only_if_ref) |
1784 | { | |
1785 | Sized_symbol<size>* sym; | |
86f2e683 | 1786 | Sized_symbol<size>* oldsym; |
8c500701 | 1787 | bool resolve_oldsym; |
ead1e424 | 1788 | |
8851ecca | 1789 | if (parameters->target().is_big_endian()) |
193a53d9 ILT |
1790 | { |
1791 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 1792 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
1793 | only_if_ref, &oldsym, |
1794 | &resolve_oldsym); | |
193a53d9 ILT |
1795 | #else |
1796 | gold_unreachable(); | |
1797 | #endif | |
1798 | } | |
ead1e424 | 1799 | else |
193a53d9 ILT |
1800 | { |
1801 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 1802 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
1803 | only_if_ref, &oldsym, |
1804 | &resolve_oldsym); | |
193a53d9 ILT |
1805 | #else |
1806 | gold_unreachable(); | |
1807 | #endif | |
1808 | } | |
ead1e424 ILT |
1809 | |
1810 | if (sym == NULL) | |
14b31740 | 1811 | return NULL; |
ead1e424 | 1812 | |
2ea97941 ILT |
1813 | sym->init_output_data(name, version, od, value, symsize, type, binding, |
1814 | visibility, nonvis, offset_is_from_end); | |
14b31740 | 1815 | |
e5756efb | 1816 | if (oldsym == NULL) |
55a93433 ILT |
1817 | { |
1818 | if (binding == elfcpp::STB_LOCAL | |
2ea97941 | 1819 | || this->version_script_.symbol_is_local(name)) |
55a93433 | 1820 | this->force_local(sym); |
2ea97941 | 1821 | else if (version != NULL) |
75517b77 | 1822 | sym->set_is_default(); |
55a93433 ILT |
1823 | return sym; |
1824 | } | |
86f2e683 | 1825 | |
99fff23b | 1826 | if (Symbol_table::should_override_with_special(oldsym, defined)) |
e5756efb | 1827 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
1828 | |
1829 | if (resolve_oldsym) | |
1830 | return sym; | |
1831 | else | |
1832 | { | |
1833 | delete sym; | |
1834 | return oldsym; | |
1835 | } | |
ead1e424 ILT |
1836 | } |
1837 | ||
1838 | // Define a symbol based on an Output_segment. | |
1839 | ||
14b31740 | 1840 | Symbol* |
2ea97941 | 1841 | Symbol_table::define_in_output_segment(const char* name, |
99fff23b ILT |
1842 | const char* version, |
1843 | Defined defined, | |
1844 | Output_segment* os, | |
2ea97941 ILT |
1845 | uint64_t value, |
1846 | uint64_t symsize, | |
9b07f471 ILT |
1847 | elfcpp::STT type, |
1848 | elfcpp::STB binding, | |
ead1e424 ILT |
1849 | elfcpp::STV visibility, |
1850 | unsigned char nonvis, | |
2ea97941 | 1851 | Symbol::Segment_offset_base offset_base, |
ead1e424 ILT |
1852 | bool only_if_ref) |
1853 | { | |
8851ecca | 1854 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
1855 | { |
1856 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 1857 | return this->do_define_in_output_segment<32>(name, version, defined, os, |
2ea97941 | 1858 | value, symsize, type, |
86f2e683 | 1859 | binding, visibility, nonvis, |
2ea97941 | 1860 | offset_base, only_if_ref); |
86f2e683 ILT |
1861 | #else |
1862 | gold_unreachable(); | |
1863 | #endif | |
1864 | } | |
8851ecca | 1865 | else if (parameters->target().get_size() == 64) |
86f2e683 ILT |
1866 | { |
1867 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
99fff23b | 1868 | return this->do_define_in_output_segment<64>(name, version, defined, os, |
2ea97941 | 1869 | value, symsize, type, |
86f2e683 | 1870 | binding, visibility, nonvis, |
2ea97941 | 1871 | offset_base, only_if_ref); |
86f2e683 ILT |
1872 | #else |
1873 | gold_unreachable(); | |
1874 | #endif | |
1875 | } | |
ead1e424 | 1876 | else |
a3ad94ed | 1877 | gold_unreachable(); |
ead1e424 ILT |
1878 | } |
1879 | ||
1880 | // Define a symbol in an Output_segment, sized version. | |
1881 | ||
1882 | template<int size> | |
14b31740 | 1883 | Sized_symbol<size>* |
ead1e424 | 1884 | Symbol_table::do_define_in_output_segment( |
2ea97941 ILT |
1885 | const char* name, |
1886 | const char* version, | |
99fff23b | 1887 | Defined defined, |
ead1e424 | 1888 | Output_segment* os, |
2ea97941 ILT |
1889 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
1890 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
1891 | elfcpp::STT type, |
1892 | elfcpp::STB binding, | |
1893 | elfcpp::STV visibility, | |
1894 | unsigned char nonvis, | |
2ea97941 | 1895 | Symbol::Segment_offset_base offset_base, |
ead1e424 ILT |
1896 | bool only_if_ref) |
1897 | { | |
1898 | Sized_symbol<size>* sym; | |
86f2e683 | 1899 | Sized_symbol<size>* oldsym; |
8c500701 | 1900 | bool resolve_oldsym; |
ead1e424 | 1901 | |
8851ecca | 1902 | if (parameters->target().is_big_endian()) |
9025d29d ILT |
1903 | { |
1904 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 1905 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
1906 | only_if_ref, &oldsym, |
1907 | &resolve_oldsym); | |
9025d29d ILT |
1908 | #else |
1909 | gold_unreachable(); | |
1910 | #endif | |
1911 | } | |
ead1e424 | 1912 | else |
9025d29d ILT |
1913 | { |
1914 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 1915 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
1916 | only_if_ref, &oldsym, |
1917 | &resolve_oldsym); | |
9025d29d ILT |
1918 | #else |
1919 | gold_unreachable(); | |
1920 | #endif | |
1921 | } | |
ead1e424 ILT |
1922 | |
1923 | if (sym == NULL) | |
14b31740 | 1924 | return NULL; |
ead1e424 | 1925 | |
2ea97941 ILT |
1926 | sym->init_output_segment(name, version, os, value, symsize, type, binding, |
1927 | visibility, nonvis, offset_base); | |
14b31740 | 1928 | |
e5756efb | 1929 | if (oldsym == NULL) |
55a93433 ILT |
1930 | { |
1931 | if (binding == elfcpp::STB_LOCAL | |
2ea97941 | 1932 | || this->version_script_.symbol_is_local(name)) |
55a93433 | 1933 | this->force_local(sym); |
2ea97941 | 1934 | else if (version != NULL) |
75517b77 | 1935 | sym->set_is_default(); |
55a93433 ILT |
1936 | return sym; |
1937 | } | |
86f2e683 | 1938 | |
99fff23b | 1939 | if (Symbol_table::should_override_with_special(oldsym, defined)) |
e5756efb | 1940 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
1941 | |
1942 | if (resolve_oldsym) | |
1943 | return sym; | |
1944 | else | |
1945 | { | |
1946 | delete sym; | |
1947 | return oldsym; | |
1948 | } | |
ead1e424 ILT |
1949 | } |
1950 | ||
1951 | // Define a special symbol with a constant value. It is a multiple | |
1952 | // definition error if this symbol is already defined. | |
1953 | ||
14b31740 | 1954 | Symbol* |
2ea97941 ILT |
1955 | Symbol_table::define_as_constant(const char* name, |
1956 | const char* version, | |
99fff23b | 1957 | Defined defined, |
2ea97941 ILT |
1958 | uint64_t value, |
1959 | uint64_t symsize, | |
9b07f471 ILT |
1960 | elfcpp::STT type, |
1961 | elfcpp::STB binding, | |
1962 | elfcpp::STV visibility, | |
1963 | unsigned char nonvis, | |
caa9d5d9 ILT |
1964 | bool only_if_ref, |
1965 | bool force_override) | |
ead1e424 | 1966 | { |
8851ecca | 1967 | if (parameters->target().get_size() == 32) |
86f2e683 ILT |
1968 | { |
1969 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) | |
99fff23b | 1970 | return this->do_define_as_constant<32>(name, version, defined, value, |
2ea97941 | 1971 | symsize, type, binding, |
caa9d5d9 ILT |
1972 | visibility, nonvis, only_if_ref, |
1973 | force_override); | |
86f2e683 ILT |
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_as_constant<64>(name, version, defined, value, |
2ea97941 | 1982 | symsize, type, binding, |
caa9d5d9 ILT |
1983 | visibility, nonvis, only_if_ref, |
1984 | force_override); | |
86f2e683 ILT |
1985 | #else |
1986 | gold_unreachable(); | |
1987 | #endif | |
1988 | } | |
ead1e424 | 1989 | else |
a3ad94ed | 1990 | gold_unreachable(); |
ead1e424 ILT |
1991 | } |
1992 | ||
1993 | // Define a symbol as a constant, sized version. | |
1994 | ||
1995 | template<int size> | |
14b31740 | 1996 | Sized_symbol<size>* |
ead1e424 | 1997 | Symbol_table::do_define_as_constant( |
2ea97941 ILT |
1998 | const char* name, |
1999 | const char* version, | |
99fff23b | 2000 | Defined defined, |
2ea97941 ILT |
2001 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2002 | typename elfcpp::Elf_types<size>::Elf_WXword symsize, | |
ead1e424 ILT |
2003 | elfcpp::STT type, |
2004 | elfcpp::STB binding, | |
2005 | elfcpp::STV visibility, | |
2006 | unsigned char nonvis, | |
caa9d5d9 ILT |
2007 | bool only_if_ref, |
2008 | bool force_override) | |
ead1e424 ILT |
2009 | { |
2010 | Sized_symbol<size>* sym; | |
86f2e683 | 2011 | Sized_symbol<size>* oldsym; |
8c500701 | 2012 | bool resolve_oldsym; |
ead1e424 | 2013 | |
8851ecca | 2014 | if (parameters->target().is_big_endian()) |
9025d29d ILT |
2015 | { |
2016 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) | |
2ea97941 | 2017 | sym = this->define_special_symbol<size, true>(&name, &version, |
8c500701 ILT |
2018 | only_if_ref, &oldsym, |
2019 | &resolve_oldsym); | |
9025d29d ILT |
2020 | #else |
2021 | gold_unreachable(); | |
2022 | #endif | |
2023 | } | |
ead1e424 | 2024 | else |
9025d29d ILT |
2025 | { |
2026 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) | |
2ea97941 | 2027 | sym = this->define_special_symbol<size, false>(&name, &version, |
8c500701 ILT |
2028 | only_if_ref, &oldsym, |
2029 | &resolve_oldsym); | |
9025d29d ILT |
2030 | #else |
2031 | gold_unreachable(); | |
2032 | #endif | |
2033 | } | |
ead1e424 ILT |
2034 | |
2035 | if (sym == NULL) | |
14b31740 | 2036 | return NULL; |
ead1e424 | 2037 | |
2ea97941 | 2038 | sym->init_constant(name, version, value, symsize, type, binding, visibility, |
75517b77 | 2039 | nonvis); |
14b31740 | 2040 | |
e5756efb | 2041 | if (oldsym == NULL) |
55a93433 | 2042 | { |
686c8caf ILT |
2043 | // Version symbols are absolute symbols with name == version. |
2044 | // We don't want to force them to be local. | |
2ea97941 ILT |
2045 | if ((version == NULL |
2046 | || name != version | |
2047 | || value != 0) | |
686c8caf | 2048 | && (binding == elfcpp::STB_LOCAL |
2ea97941 | 2049 | || this->version_script_.symbol_is_local(name))) |
55a93433 | 2050 | this->force_local(sym); |
2ea97941 ILT |
2051 | else if (version != NULL |
2052 | && (name != version || value != 0)) | |
75517b77 | 2053 | sym->set_is_default(); |
55a93433 ILT |
2054 | return sym; |
2055 | } | |
86f2e683 | 2056 | |
99fff23b ILT |
2057 | if (force_override |
2058 | || Symbol_table::should_override_with_special(oldsym, defined)) | |
e5756efb | 2059 | this->override_with_special(oldsym, sym); |
8c500701 ILT |
2060 | |
2061 | if (resolve_oldsym) | |
2062 | return sym; | |
2063 | else | |
2064 | { | |
2065 | delete sym; | |
2066 | return oldsym; | |
2067 | } | |
ead1e424 ILT |
2068 | } |
2069 | ||
2070 | // Define a set of symbols in output sections. | |
2071 | ||
2072 | void | |
9b07f471 | 2073 | Symbol_table::define_symbols(const Layout* layout, int count, |
a445fddf ILT |
2074 | const Define_symbol_in_section* p, |
2075 | bool only_if_ref) | |
ead1e424 ILT |
2076 | { |
2077 | for (int i = 0; i < count; ++i, ++p) | |
2078 | { | |
2079 | Output_section* os = layout->find_output_section(p->output_section); | |
2080 | if (os != NULL) | |
99fff23b | 2081 | this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value, |
14b31740 ILT |
2082 | p->size, p->type, p->binding, |
2083 | p->visibility, p->nonvis, | |
a445fddf ILT |
2084 | p->offset_is_from_end, |
2085 | only_if_ref || p->only_if_ref); | |
ead1e424 | 2086 | else |
99fff23b ILT |
2087 | this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size, |
2088 | p->type, p->binding, p->visibility, p->nonvis, | |
caa9d5d9 ILT |
2089 | only_if_ref || p->only_if_ref, |
2090 | false); | |
ead1e424 ILT |
2091 | } |
2092 | } | |
2093 | ||
2094 | // Define a set of symbols in output segments. | |
2095 | ||
2096 | void | |
9b07f471 | 2097 | Symbol_table::define_symbols(const Layout* layout, int count, |
a445fddf ILT |
2098 | const Define_symbol_in_segment* p, |
2099 | bool only_if_ref) | |
ead1e424 ILT |
2100 | { |
2101 | for (int i = 0; i < count; ++i, ++p) | |
2102 | { | |
2103 | Output_segment* os = layout->find_output_segment(p->segment_type, | |
2104 | p->segment_flags_set, | |
2105 | p->segment_flags_clear); | |
2106 | if (os != NULL) | |
99fff23b | 2107 | this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value, |
14b31740 ILT |
2108 | p->size, p->type, p->binding, |
2109 | p->visibility, p->nonvis, | |
a445fddf ILT |
2110 | p->offset_base, |
2111 | only_if_ref || p->only_if_ref); | |
ead1e424 | 2112 | else |
99fff23b ILT |
2113 | this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size, |
2114 | p->type, p->binding, p->visibility, p->nonvis, | |
caa9d5d9 ILT |
2115 | only_if_ref || p->only_if_ref, |
2116 | false); | |
ead1e424 ILT |
2117 | } |
2118 | } | |
2119 | ||
46fe1623 ILT |
2120 | // Define CSYM using a COPY reloc. POSD is the Output_data where the |
2121 | // symbol should be defined--typically a .dyn.bss section. VALUE is | |
2122 | // the offset within POSD. | |
2123 | ||
2124 | template<int size> | |
2125 | void | |
fe8718a4 | 2126 | Symbol_table::define_with_copy_reloc( |
fe8718a4 ILT |
2127 | Sized_symbol<size>* csym, |
2128 | Output_data* posd, | |
2ea97941 | 2129 | typename elfcpp::Elf_types<size>::Elf_Addr value) |
46fe1623 ILT |
2130 | { |
2131 | gold_assert(csym->is_from_dynobj()); | |
2132 | gold_assert(!csym->is_copied_from_dynobj()); | |
2ea97941 ILT |
2133 | Object* object = csym->object(); |
2134 | gold_assert(object->is_dynamic()); | |
2135 | Dynobj* dynobj = static_cast<Dynobj*>(object); | |
46fe1623 ILT |
2136 | |
2137 | // Our copied variable has to override any variable in a shared | |
2138 | // library. | |
2139 | elfcpp::STB binding = csym->binding(); | |
2140 | if (binding == elfcpp::STB_WEAK) | |
2141 | binding = elfcpp::STB_GLOBAL; | |
2142 | ||
99fff23b | 2143 | this->define_in_output_data(csym->name(), csym->version(), COPY, |
2ea97941 | 2144 | posd, value, csym->symsize(), |
46fe1623 ILT |
2145 | csym->type(), binding, |
2146 | csym->visibility(), csym->nonvis(), | |
2147 | false, false); | |
2148 | ||
2149 | csym->set_is_copied_from_dynobj(); | |
2150 | csym->set_needs_dynsym_entry(); | |
2151 | ||
2152 | this->copied_symbol_dynobjs_[csym] = dynobj; | |
2153 | ||
2154 | // We have now defined all aliases, but we have not entered them all | |
2155 | // in the copied_symbol_dynobjs_ map. | |
2156 | if (csym->has_alias()) | |
2157 | { | |
2158 | Symbol* sym = csym; | |
2159 | while (true) | |
2160 | { | |
2161 | sym = this->weak_aliases_[sym]; | |
2162 | if (sym == csym) | |
2163 | break; | |
2164 | gold_assert(sym->output_data() == posd); | |
2165 | ||
2166 | sym->set_is_copied_from_dynobj(); | |
2167 | this->copied_symbol_dynobjs_[sym] = dynobj; | |
2168 | } | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | // SYM is defined using a COPY reloc. Return the dynamic object where | |
2173 | // the original definition was found. | |
2174 | ||
2175 | Dynobj* | |
2176 | Symbol_table::get_copy_source(const Symbol* sym) const | |
2177 | { | |
2178 | gold_assert(sym->is_copied_from_dynobj()); | |
2179 | Copied_symbol_dynobjs::const_iterator p = | |
2180 | this->copied_symbol_dynobjs_.find(sym); | |
2181 | gold_assert(p != this->copied_symbol_dynobjs_.end()); | |
2182 | return p->second; | |
2183 | } | |
2184 | ||
f3e9c5c5 ILT |
2185 | // Add any undefined symbols named on the command line. |
2186 | ||
2187 | void | |
88a4108b | 2188 | Symbol_table::add_undefined_symbols_from_command_line(Layout* layout) |
f3e9c5c5 | 2189 | { |
88a4108b ILT |
2190 | if (parameters->options().any_undefined() |
2191 | || layout->script_options()->any_unreferenced()) | |
f3e9c5c5 ILT |
2192 | { |
2193 | if (parameters->target().get_size() == 32) | |
2194 | { | |
5adf9721 | 2195 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
88a4108b | 2196 | this->do_add_undefined_symbols_from_command_line<32>(layout); |
f3e9c5c5 ILT |
2197 | #else |
2198 | gold_unreachable(); | |
2199 | #endif | |
2200 | } | |
2201 | else if (parameters->target().get_size() == 64) | |
2202 | { | |
2203 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
88a4108b | 2204 | this->do_add_undefined_symbols_from_command_line<64>(layout); |
f3e9c5c5 ILT |
2205 | #else |
2206 | gold_unreachable(); | |
2207 | #endif | |
2208 | } | |
2209 | else | |
2210 | gold_unreachable(); | |
2211 | } | |
2212 | } | |
2213 | ||
2214 | template<int size> | |
2215 | void | |
88a4108b | 2216 | Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout) |
f3e9c5c5 ILT |
2217 | { |
2218 | for (options::String_set::const_iterator p = | |
2219 | parameters->options().undefined_begin(); | |
2220 | p != parameters->options().undefined_end(); | |
2221 | ++p) | |
88a4108b | 2222 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); |
f3e9c5c5 | 2223 | |
88a4108b ILT |
2224 | for (Script_options::referenced_const_iterator p = |
2225 | layout->script_options()->referenced_begin(); | |
2226 | p != layout->script_options()->referenced_end(); | |
2227 | ++p) | |
2228 | this->add_undefined_symbol_from_command_line<size>(p->c_str()); | |
2229 | } | |
2230 | ||
2231 | template<int size> | |
2232 | void | |
2233 | Symbol_table::add_undefined_symbol_from_command_line(const char* name) | |
2234 | { | |
2235 | if (this->lookup(name) != NULL) | |
2236 | return; | |
f3e9c5c5 | 2237 | |
88a4108b | 2238 | const char* version = NULL; |
f3e9c5c5 | 2239 | |
88a4108b ILT |
2240 | Sized_symbol<size>* sym; |
2241 | Sized_symbol<size>* oldsym; | |
2242 | bool resolve_oldsym; | |
2243 | if (parameters->target().is_big_endian()) | |
2244 | { | |
f3e9c5c5 | 2245 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG) |
88a4108b ILT |
2246 | sym = this->define_special_symbol<size, true>(&name, &version, |
2247 | false, &oldsym, | |
2248 | &resolve_oldsym); | |
f3e9c5c5 | 2249 | #else |
88a4108b | 2250 | gold_unreachable(); |
f3e9c5c5 | 2251 | #endif |
88a4108b ILT |
2252 | } |
2253 | else | |
2254 | { | |
f3e9c5c5 | 2255 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE) |
88a4108b ILT |
2256 | sym = this->define_special_symbol<size, false>(&name, &version, |
2257 | false, &oldsym, | |
2258 | &resolve_oldsym); | |
f3e9c5c5 | 2259 | #else |
88a4108b | 2260 | gold_unreachable(); |
f3e9c5c5 | 2261 | #endif |
88a4108b | 2262 | } |
f3e9c5c5 | 2263 | |
88a4108b | 2264 | gold_assert(oldsym == NULL); |
f3e9c5c5 | 2265 | |
88a4108b ILT |
2266 | sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
2267 | elfcpp::STV_DEFAULT, 0); | |
2268 | ++this->saw_undefined_; | |
f3e9c5c5 ILT |
2269 | } |
2270 | ||
a3ad94ed ILT |
2271 | // Set the dynamic symbol indexes. INDEX is the index of the first |
2272 | // global dynamic symbol. Pointers to the symbols are stored into the | |
2273 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
2274 | // updated dynamic symbol index. | |
2275 | ||
2276 | unsigned int | |
9b07f471 | 2277 | Symbol_table::set_dynsym_indexes(unsigned int index, |
a3ad94ed | 2278 | std::vector<Symbol*>* syms, |
14b31740 ILT |
2279 | Stringpool* dynpool, |
2280 | Versions* versions) | |
a3ad94ed ILT |
2281 | { |
2282 | for (Symbol_table_type::iterator p = this->table_.begin(); | |
2283 | p != this->table_.end(); | |
2284 | ++p) | |
2285 | { | |
2286 | Symbol* sym = p->second; | |
16649710 ILT |
2287 | |
2288 | // Note that SYM may already have a dynamic symbol index, since | |
2289 | // some symbols appear more than once in the symbol table, with | |
2290 | // and without a version. | |
2291 | ||
ce97fa81 | 2292 | if (!sym->should_add_dynsym_entry(this)) |
16649710 ILT |
2293 | sym->set_dynsym_index(-1U); |
2294 | else if (!sym->has_dynsym_index()) | |
a3ad94ed ILT |
2295 | { |
2296 | sym->set_dynsym_index(index); | |
2297 | ++index; | |
2298 | syms->push_back(sym); | |
cfd73a4e | 2299 | dynpool->add(sym->name(), false, NULL); |
14b31740 ILT |
2300 | |
2301 | // Record any version information. | |
09124467 ILT |
2302 | if (sym->version() != NULL) |
2303 | versions->record_version(this, dynpool, sym); | |
594c8e5e ILT |
2304 | |
2305 | // If the symbol is defined in a dynamic object and is | |
2306 | // referenced in a regular object, then mark the dynamic | |
2307 | // object as needed. This is used to implement --as-needed. | |
2308 | if (sym->is_from_dynobj() && sym->in_reg()) | |
2309 | sym->object()->set_is_needed(); | |
a3ad94ed ILT |
2310 | } |
2311 | } | |
2312 | ||
14b31740 ILT |
2313 | // Finish up the versions. In some cases this may add new dynamic |
2314 | // symbols. | |
9b07f471 | 2315 | index = versions->finalize(this, index, syms); |
14b31740 | 2316 | |
a3ad94ed ILT |
2317 | return index; |
2318 | } | |
2319 | ||
c06b7b0b | 2320 | // Set the final values for all the symbols. The index of the first |
55a93433 ILT |
2321 | // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the |
2322 | // file offset OFF. Add their names to POOL. Return the new file | |
2323 | // offset. Update *PLOCAL_SYMCOUNT if necessary. | |
54dc6425 | 2324 | |
75f65a3e | 2325 | off_t |
55a93433 ILT |
2326 | Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index, |
2327 | size_t dyncount, Stringpool* pool, | |
ca09d69a | 2328 | unsigned int* plocal_symcount) |
54dc6425 | 2329 | { |
f6ce93d6 ILT |
2330 | off_t ret; |
2331 | ||
55a93433 ILT |
2332 | gold_assert(*plocal_symcount != 0); |
2333 | this->first_global_index_ = *plocal_symcount; | |
c06b7b0b | 2334 | |
16649710 ILT |
2335 | this->dynamic_offset_ = dynoff; |
2336 | this->first_dynamic_global_index_ = dyn_global_index; | |
2337 | this->dynamic_count_ = dyncount; | |
2338 | ||
8851ecca | 2339 | if (parameters->target().get_size() == 32) |
9025d29d ILT |
2340 | { |
2341 | #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE) | |
55a93433 | 2342 | ret = this->sized_finalize<32>(off, pool, plocal_symcount); |
9025d29d ILT |
2343 | #else |
2344 | gold_unreachable(); | |
2345 | #endif | |
2346 | } | |
8851ecca | 2347 | else if (parameters->target().get_size() == 64) |
9025d29d ILT |
2348 | { |
2349 | #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE) | |
55a93433 | 2350 | ret = this->sized_finalize<64>(off, pool, plocal_symcount); |
9025d29d ILT |
2351 | #else |
2352 | gold_unreachable(); | |
2353 | #endif | |
2354 | } | |
61ba1cf9 | 2355 | else |
a3ad94ed | 2356 | gold_unreachable(); |
f6ce93d6 ILT |
2357 | |
2358 | // Now that we have the final symbol table, we can reliably note | |
2359 | // which symbols should get warnings. | |
cb295612 | 2360 | this->warnings_.note_warnings(this); |
f6ce93d6 ILT |
2361 | |
2362 | return ret; | |
75f65a3e ILT |
2363 | } |
2364 | ||
55a93433 ILT |
2365 | // SYM is going into the symbol table at *PINDEX. Add the name to |
2366 | // POOL, update *PINDEX and *POFF. | |
2367 | ||
2368 | template<int size> | |
2369 | void | |
2370 | Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool, | |
2371 | unsigned int* pindex, off_t* poff) | |
2372 | { | |
2373 | sym->set_symtab_index(*pindex); | |
2374 | pool->add(sym->name(), false, NULL); | |
2375 | ++*pindex; | |
2376 | *poff += elfcpp::Elf_sizes<size>::sym_size; | |
2377 | } | |
2378 | ||
ead1e424 ILT |
2379 | // Set the final value for all the symbols. This is called after |
2380 | // Layout::finalize, so all the output sections have their final | |
2381 | // address. | |
75f65a3e ILT |
2382 | |
2383 | template<int size> | |
2384 | off_t | |
55a93433 ILT |
2385 | Symbol_table::sized_finalize(off_t off, Stringpool* pool, |
2386 | unsigned int* plocal_symcount) | |
75f65a3e | 2387 | { |
ead1e424 | 2388 | off = align_address(off, size >> 3); |
75f65a3e ILT |
2389 | this->offset_ = off; |
2390 | ||
55a93433 ILT |
2391 | unsigned int index = *plocal_symcount; |
2392 | const unsigned int orig_index = index; | |
c06b7b0b | 2393 | |
55a93433 ILT |
2394 | // First do all the symbols which have been forced to be local, as |
2395 | // they must appear before all global symbols. | |
2396 | for (Forced_locals::iterator p = this->forced_locals_.begin(); | |
2397 | p != this->forced_locals_.end(); | |
2398 | ++p) | |
2399 | { | |
2400 | Symbol* sym = *p; | |
2401 | gold_assert(sym->is_forced_local()); | |
2402 | if (this->sized_finalize_symbol<size>(sym)) | |
2403 | { | |
2404 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
2405 | ++*plocal_symcount; | |
2406 | } | |
2407 | } | |
2408 | ||
2409 | // Now do all the remaining symbols. | |
c06b7b0b ILT |
2410 | for (Symbol_table_type::iterator p = this->table_.begin(); |
2411 | p != this->table_.end(); | |
2412 | ++p) | |
54dc6425 | 2413 | { |
55a93433 ILT |
2414 | Symbol* sym = p->second; |
2415 | if (this->sized_finalize_symbol<size>(sym)) | |
2416 | this->add_to_final_symtab<size>(sym, pool, &index, &off); | |
2417 | } | |
54dc6425 | 2418 | |
55a93433 | 2419 | this->output_count_ = index - orig_index; |
a3ad94ed | 2420 | |
55a93433 ILT |
2421 | return off; |
2422 | } | |
75f65a3e | 2423 | |
c0a62865 DK |
2424 | // Compute the final value of SYM and store status in location PSTATUS. |
2425 | // During relaxation, this may be called multiple times for a symbol to | |
2426 | // compute its would-be final value in each relaxation pass. | |
008db82e | 2427 | |
55a93433 | 2428 | template<int size> |
c0a62865 DK |
2429 | typename Sized_symbol<size>::Value_type |
2430 | Symbol_table::compute_final_value( | |
2431 | const Sized_symbol<size>* sym, | |
2432 | Compute_final_value_status* pstatus) const | |
55a93433 | 2433 | { |
ef9beddf | 2434 | typedef typename Sized_symbol<size>::Value_type Value_type; |
2ea97941 | 2435 | Value_type value; |
ead1e424 | 2436 | |
55a93433 ILT |
2437 | switch (sym->source()) |
2438 | { | |
2439 | case Symbol::FROM_OBJECT: | |
2440 | { | |
d491d34e | 2441 | bool is_ordinary; |
2ea97941 | 2442 | unsigned int shndx = sym->shndx(&is_ordinary); |
ead1e424 | 2443 | |
d491d34e | 2444 | if (!is_ordinary |
2ea97941 ILT |
2445 | && shndx != elfcpp::SHN_ABS |
2446 | && !Symbol::is_common_shndx(shndx)) | |
55a93433 | 2447 | { |
c0a62865 DK |
2448 | *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION; |
2449 | return 0; | |
ead1e424 | 2450 | } |
ead1e424 | 2451 | |
55a93433 ILT |
2452 | Object* symobj = sym->object(); |
2453 | if (symobj->is_dynamic()) | |
ead1e424 | 2454 | { |
2ea97941 ILT |
2455 | value = 0; |
2456 | shndx = elfcpp::SHN_UNDEF; | |
ead1e424 | 2457 | } |
89fc3421 CC |
2458 | else if (symobj->pluginobj() != NULL) |
2459 | { | |
2ea97941 ILT |
2460 | value = 0; |
2461 | shndx = elfcpp::SHN_UNDEF; | |
89fc3421 | 2462 | } |
2ea97941 ILT |
2463 | else if (shndx == elfcpp::SHN_UNDEF) |
2464 | value = 0; | |
d491d34e | 2465 | else if (!is_ordinary |
2ea97941 ILT |
2466 | && (shndx == elfcpp::SHN_ABS |
2467 | || Symbol::is_common_shndx(shndx))) | |
2468 | value = sym->value(); | |
55a93433 | 2469 | else |
ead1e424 | 2470 | { |
55a93433 | 2471 | Relobj* relobj = static_cast<Relobj*>(symobj); |
2ea97941 | 2472 | Output_section* os = relobj->output_section(shndx); |
55a93433 | 2473 | |
2ea97941 | 2474 | if (this->is_section_folded(relobj, shndx)) |
ef15dade ST |
2475 | { |
2476 | gold_assert(os == NULL); | |
2477 | // Get the os of the section it is folded onto. | |
2478 | Section_id folded = this->icf_->get_folded_section(relobj, | |
2ea97941 | 2479 | shndx); |
ef15dade ST |
2480 | gold_assert(folded.first != NULL); |
2481 | Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first); | |
d6344fb5 DK |
2482 | unsigned folded_shndx = folded.second; |
2483 | ||
2484 | os = folded_obj->output_section(folded_shndx); | |
ef15dade | 2485 | gold_assert(os != NULL); |
d6344fb5 DK |
2486 | |
2487 | // Replace (relobj, shndx) with canonical ICF input section. | |
2488 | shndx = folded_shndx; | |
2489 | relobj = folded_obj; | |
ef15dade ST |
2490 | } |
2491 | ||
d6344fb5 | 2492 | uint64_t secoff64 = relobj->output_section_offset(shndx); |
ef15dade | 2493 | if (os == NULL) |
ead1e424 | 2494 | { |
6d03d481 ST |
2495 | bool static_or_reloc = (parameters->doing_static_link() || |
2496 | parameters->options().relocatable()); | |
2497 | gold_assert(static_or_reloc || sym->dynsym_index() == -1U); | |
2498 | ||
c0a62865 DK |
2499 | *pstatus = CFVS_NO_OUTPUT_SECTION; |
2500 | return 0; | |
ead1e424 | 2501 | } |
55a93433 | 2502 | |
eff45813 CC |
2503 | if (secoff64 == -1ULL) |
2504 | { | |
2505 | // The section needs special handling (e.g., a merge section). | |
ef15dade | 2506 | |
2ea97941 | 2507 | value = os->output_address(relobj, shndx, sym->value()); |
eff45813 CC |
2508 | } |
2509 | else | |
2510 | { | |
2511 | Value_type secoff = | |
2512 | convert_types<Value_type, uint64_t>(secoff64); | |
2513 | if (sym->type() == elfcpp::STT_TLS) | |
2ea97941 | 2514 | value = sym->value() + os->tls_offset() + secoff; |
eff45813 | 2515 | else |
2ea97941 | 2516 | value = sym->value() + os->address() + secoff; |
eff45813 | 2517 | } |
ead1e424 | 2518 | } |
55a93433 ILT |
2519 | } |
2520 | break; | |
2521 | ||
2522 | case Symbol::IN_OUTPUT_DATA: | |
2523 | { | |
2524 | Output_data* od = sym->output_data(); | |
2ea97941 | 2525 | value = sym->value(); |
155a0dd7 | 2526 | if (sym->type() != elfcpp::STT_TLS) |
2ea97941 | 2527 | value += od->address(); |
155a0dd7 ILT |
2528 | else |
2529 | { | |
2530 | Output_section* os = od->output_section(); | |
2531 | gold_assert(os != NULL); | |
2ea97941 | 2532 | value += os->tls_offset() + (od->address() - os->address()); |
155a0dd7 | 2533 | } |
55a93433 | 2534 | if (sym->offset_is_from_end()) |
2ea97941 | 2535 | value += od->data_size(); |
55a93433 ILT |
2536 | } |
2537 | break; | |
2538 | ||
2539 | case Symbol::IN_OUTPUT_SEGMENT: | |
2540 | { | |
2541 | Output_segment* os = sym->output_segment(); | |
2ea97941 | 2542 | value = sym->value(); |
edfbb029 | 2543 | if (sym->type() != elfcpp::STT_TLS) |
2ea97941 | 2544 | value += os->vaddr(); |
55a93433 ILT |
2545 | switch (sym->offset_base()) |
2546 | { | |
2547 | case Symbol::SEGMENT_START: | |
2548 | break; | |
2549 | case Symbol::SEGMENT_END: | |
2ea97941 | 2550 | value += os->memsz(); |
55a93433 ILT |
2551 | break; |
2552 | case Symbol::SEGMENT_BSS: | |
2ea97941 | 2553 | value += os->filesz(); |
55a93433 ILT |
2554 | break; |
2555 | default: | |
2556 | gold_unreachable(); | |
2557 | } | |
2558 | } | |
2559 | break; | |
ead1e424 | 2560 | |
f3e9c5c5 | 2561 | case Symbol::IS_CONSTANT: |
2ea97941 | 2562 | value = sym->value(); |
55a93433 | 2563 | break; |
ead1e424 | 2564 | |
f3e9c5c5 | 2565 | case Symbol::IS_UNDEFINED: |
2ea97941 | 2566 | value = 0; |
f3e9c5c5 ILT |
2567 | break; |
2568 | ||
55a93433 ILT |
2569 | default: |
2570 | gold_unreachable(); | |
2571 | } | |
ead1e424 | 2572 | |
c0a62865 | 2573 | *pstatus = CFVS_OK; |
2ea97941 | 2574 | return value; |
c0a62865 DK |
2575 | } |
2576 | ||
2577 | // Finalize the symbol SYM. This returns true if the symbol should be | |
2578 | // added to the symbol table, false otherwise. | |
2579 | ||
2580 | template<int size> | |
2581 | bool | |
2582 | Symbol_table::sized_finalize_symbol(Symbol* unsized_sym) | |
2583 | { | |
2584 | typedef typename Sized_symbol<size>::Value_type Value_type; | |
2585 | ||
2586 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym); | |
2587 | ||
2588 | // The default version of a symbol may appear twice in the symbol | |
2589 | // table. We only need to finalize it once. | |
2590 | if (sym->has_symtab_index()) | |
2591 | return false; | |
2592 | ||
2593 | if (!sym->in_reg()) | |
2594 | { | |
2595 | gold_assert(!sym->has_symtab_index()); | |
2596 | sym->set_symtab_index(-1U); | |
2597 | gold_assert(sym->dynsym_index() == -1U); | |
2598 | return false; | |
2599 | } | |
2600 | ||
badc8139 RÁE |
2601 | // If the symbol is only present on plugin files, the plugin decided we |
2602 | // don't need it. | |
2603 | if (!sym->in_real_elf()) | |
2604 | { | |
2605 | gold_assert(!sym->has_symtab_index()); | |
2606 | sym->set_symtab_index(-1U); | |
2607 | return false; | |
2608 | } | |
2609 | ||
c0a62865 DK |
2610 | // Compute final symbol value. |
2611 | Compute_final_value_status status; | |
2ea97941 | 2612 | Value_type value = this->compute_final_value(sym, &status); |
c0a62865 DK |
2613 | |
2614 | switch (status) | |
2615 | { | |
2616 | case CFVS_OK: | |
2617 | break; | |
2618 | case CFVS_UNSUPPORTED_SYMBOL_SECTION: | |
2619 | { | |
2620 | bool is_ordinary; | |
2ea97941 | 2621 | unsigned int shndx = sym->shndx(&is_ordinary); |
c0a62865 | 2622 | gold_error(_("%s: unsupported symbol section 0x%x"), |
2ea97941 | 2623 | sym->demangled_name().c_str(), shndx); |
c0a62865 DK |
2624 | } |
2625 | break; | |
2626 | case CFVS_NO_OUTPUT_SECTION: | |
2627 | sym->set_symtab_index(-1U); | |
2628 | return false; | |
2629 | default: | |
2630 | gold_unreachable(); | |
2631 | } | |
2632 | ||
2ea97941 | 2633 | sym->set_value(value); |
9e2dcb77 | 2634 | |
8c604651 CS |
2635 | if (parameters->options().strip_all() |
2636 | || !parameters->options().should_retain_symbol(sym->name())) | |
55a93433 ILT |
2637 | { |
2638 | sym->set_symtab_index(-1U); | |
2639 | return false; | |
54dc6425 | 2640 | } |
75f65a3e | 2641 | |
55a93433 | 2642 | return true; |
54dc6425 ILT |
2643 | } |
2644 | ||
61ba1cf9 ILT |
2645 | // Write out the global symbols. |
2646 | ||
2647 | void | |
fd9d194f | 2648 | Symbol_table::write_globals(const Stringpool* sympool, |
d491d34e ILT |
2649 | const Stringpool* dynpool, |
2650 | Output_symtab_xindex* symtab_xindex, | |
2651 | Output_symtab_xindex* dynsym_xindex, | |
2652 | Output_file* of) const | |
61ba1cf9 | 2653 | { |
8851ecca | 2654 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 2655 | { |
9025d29d | 2656 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca | 2657 | case Parameters::TARGET_32_LITTLE: |
fd9d194f | 2658 | this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex, |
d491d34e | 2659 | dynsym_xindex, of); |
8851ecca | 2660 | break; |
9025d29d | 2661 | #endif |
8851ecca ILT |
2662 | #ifdef HAVE_TARGET_32_BIG |
2663 | case Parameters::TARGET_32_BIG: | |
fd9d194f | 2664 | this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex, |
d491d34e | 2665 | dynsym_xindex, of); |
8851ecca | 2666 | break; |
9025d29d | 2667 | #endif |
9025d29d | 2668 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca | 2669 | case Parameters::TARGET_64_LITTLE: |
fd9d194f | 2670 | this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex, |
d491d34e | 2671 | dynsym_xindex, of); |
8851ecca | 2672 | break; |
9025d29d | 2673 | #endif |
8851ecca ILT |
2674 | #ifdef HAVE_TARGET_64_BIG |
2675 | case Parameters::TARGET_64_BIG: | |
fd9d194f | 2676 | this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex, |
d491d34e | 2677 | dynsym_xindex, of); |
8851ecca ILT |
2678 | break; |
2679 | #endif | |
2680 | default: | |
2681 | gold_unreachable(); | |
61ba1cf9 | 2682 | } |
61ba1cf9 ILT |
2683 | } |
2684 | ||
2685 | // Write out the global symbols. | |
2686 | ||
2687 | template<int size, bool big_endian> | |
2688 | void | |
fd9d194f | 2689 | Symbol_table::sized_write_globals(const Stringpool* sympool, |
16649710 | 2690 | const Stringpool* dynpool, |
d491d34e ILT |
2691 | Output_symtab_xindex* symtab_xindex, |
2692 | Output_symtab_xindex* dynsym_xindex, | |
61ba1cf9 ILT |
2693 | Output_file* of) const |
2694 | { | |
8851ecca | 2695 | const Target& target = parameters->target(); |
9a2d6984 | 2696 | |
61ba1cf9 | 2697 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
55a93433 ILT |
2698 | |
2699 | const unsigned int output_count = this->output_count_; | |
2700 | const section_size_type oview_size = output_count * sym_size; | |
2701 | const unsigned int first_global_index = this->first_global_index_; | |
5fe2a0f5 ILT |
2702 | unsigned char* psyms; |
2703 | if (this->offset_ == 0 || output_count == 0) | |
2704 | psyms = NULL; | |
2705 | else | |
2706 | psyms = of->get_output_view(this->offset_, oview_size); | |
16649710 | 2707 | |
55a93433 ILT |
2708 | const unsigned int dynamic_count = this->dynamic_count_; |
2709 | const section_size_type dynamic_size = dynamic_count * sym_size; | |
2710 | const unsigned int first_dynamic_global_index = | |
2711 | this->first_dynamic_global_index_; | |
16649710 | 2712 | unsigned char* dynamic_view; |
5fe2a0f5 | 2713 | if (this->dynamic_offset_ == 0 || dynamic_count == 0) |
16649710 ILT |
2714 | dynamic_view = NULL; |
2715 | else | |
2716 | dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size); | |
c06b7b0b | 2717 | |
61ba1cf9 ILT |
2718 | for (Symbol_table_type::const_iterator p = this->table_.begin(); |
2719 | p != this->table_.end(); | |
2720 | ++p) | |
2721 | { | |
2722 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second); | |
2723 | ||
9a2d6984 | 2724 | // Possibly warn about unresolved symbols in shared libraries. |
fd9d194f | 2725 | this->warn_about_undefined_dynobj_symbol(sym); |
e2827e5f | 2726 | |
a3ad94ed | 2727 | unsigned int sym_index = sym->symtab_index(); |
16649710 ILT |
2728 | unsigned int dynsym_index; |
2729 | if (dynamic_view == NULL) | |
2730 | dynsym_index = -1U; | |
2731 | else | |
2732 | dynsym_index = sym->dynsym_index(); | |
2733 | ||
2734 | if (sym_index == -1U && dynsym_index == -1U) | |
a3ad94ed ILT |
2735 | { |
2736 | // This symbol is not included in the output file. | |
2737 | continue; | |
2738 | } | |
16649710 | 2739 | |
2ea97941 | 2740 | unsigned int shndx; |
88dd47ac ILT |
2741 | typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value(); |
2742 | typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value; | |
ce279a62 | 2743 | elfcpp::STB binding = sym->binding(); |
ead1e424 ILT |
2744 | switch (sym->source()) |
2745 | { | |
2746 | case Symbol::FROM_OBJECT: | |
2747 | { | |
d491d34e ILT |
2748 | bool is_ordinary; |
2749 | unsigned int in_shndx = sym->shndx(&is_ordinary); | |
ead1e424 | 2750 | |
d491d34e | 2751 | if (!is_ordinary |
0dfbdef4 | 2752 | && in_shndx != elfcpp::SHN_ABS |
8a5e3e08 | 2753 | && !Symbol::is_common_shndx(in_shndx)) |
ead1e424 | 2754 | { |
75f2446e | 2755 | gold_error(_("%s: unsupported symbol section 0x%x"), |
a2b1aa12 | 2756 | sym->demangled_name().c_str(), in_shndx); |
2ea97941 | 2757 | shndx = in_shndx; |
f6ce93d6 | 2758 | } |
ead1e424 ILT |
2759 | else |
2760 | { | |
75f2446e ILT |
2761 | Object* symobj = sym->object(); |
2762 | if (symobj->is_dynamic()) | |
2763 | { | |
2764 | if (sym->needs_dynsym_value()) | |
8851ecca | 2765 | dynsym_value = target.dynsym_value(sym); |
2ea97941 | 2766 | shndx = elfcpp::SHN_UNDEF; |
ce279a62 CC |
2767 | if (sym->is_undef_binding_weak()) |
2768 | binding = elfcpp::STB_WEAK; | |
74f67560 DK |
2769 | else |
2770 | binding = elfcpp::STB_GLOBAL; | |
75f2446e | 2771 | } |
89fc3421 | 2772 | else if (symobj->pluginobj() != NULL) |
2ea97941 | 2773 | shndx = elfcpp::SHN_UNDEF; |
75f2446e | 2774 | else if (in_shndx == elfcpp::SHN_UNDEF |
d491d34e ILT |
2775 | || (!is_ordinary |
2776 | && (in_shndx == elfcpp::SHN_ABS | |
8a5e3e08 | 2777 | || Symbol::is_common_shndx(in_shndx)))) |
2ea97941 | 2778 | shndx = in_shndx; |
75f2446e ILT |
2779 | else |
2780 | { | |
2781 | Relobj* relobj = static_cast<Relobj*>(symobj); | |
ef9beddf | 2782 | Output_section* os = relobj->output_section(in_shndx); |
ef15dade ST |
2783 | if (this->is_section_folded(relobj, in_shndx)) |
2784 | { | |
2785 | // This global symbol must be written out even though | |
2786 | // it is folded. | |
2787 | // Get the os of the section it is folded onto. | |
2788 | Section_id folded = | |
2789 | this->icf_->get_folded_section(relobj, in_shndx); | |
2790 | gold_assert(folded.first !=NULL); | |
2791 | Relobj* folded_obj = | |
2792 | reinterpret_cast<Relobj*>(folded.first); | |
2793 | os = folded_obj->output_section(folded.second); | |
2794 | gold_assert(os != NULL); | |
2795 | } | |
75f2446e | 2796 | gold_assert(os != NULL); |
2ea97941 | 2797 | shndx = os->out_shndx(); |
88dd47ac | 2798 | |
2ea97941 | 2799 | if (shndx >= elfcpp::SHN_LORESERVE) |
d491d34e ILT |
2800 | { |
2801 | if (sym_index != -1U) | |
2ea97941 | 2802 | symtab_xindex->add(sym_index, shndx); |
d491d34e | 2803 | if (dynsym_index != -1U) |
2ea97941 ILT |
2804 | dynsym_xindex->add(dynsym_index, shndx); |
2805 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e ILT |
2806 | } |
2807 | ||
88dd47ac ILT |
2808 | // In object files symbol values are section |
2809 | // relative. | |
8851ecca | 2810 | if (parameters->options().relocatable()) |
88dd47ac | 2811 | sym_value -= os->address(); |
75f2446e | 2812 | } |
ead1e424 ILT |
2813 | } |
2814 | } | |
2815 | break; | |
2816 | ||
2817 | case Symbol::IN_OUTPUT_DATA: | |
2ea97941 ILT |
2818 | shndx = sym->output_data()->out_shndx(); |
2819 | if (shndx >= elfcpp::SHN_LORESERVE) | |
d491d34e ILT |
2820 | { |
2821 | if (sym_index != -1U) | |
2ea97941 | 2822 | symtab_xindex->add(sym_index, shndx); |
d491d34e | 2823 | if (dynsym_index != -1U) |
2ea97941 ILT |
2824 | dynsym_xindex->add(dynsym_index, shndx); |
2825 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e | 2826 | } |
ead1e424 ILT |
2827 | break; |
2828 | ||
2829 | case Symbol::IN_OUTPUT_SEGMENT: | |
2ea97941 | 2830 | shndx = elfcpp::SHN_ABS; |
ead1e424 ILT |
2831 | break; |
2832 | ||
f3e9c5c5 | 2833 | case Symbol::IS_CONSTANT: |
2ea97941 | 2834 | shndx = elfcpp::SHN_ABS; |
ead1e424 ILT |
2835 | break; |
2836 | ||
f3e9c5c5 | 2837 | case Symbol::IS_UNDEFINED: |
2ea97941 | 2838 | shndx = elfcpp::SHN_UNDEF; |
f3e9c5c5 ILT |
2839 | break; |
2840 | ||
ead1e424 | 2841 | default: |
a3ad94ed | 2842 | gold_unreachable(); |
ead1e424 | 2843 | } |
61ba1cf9 | 2844 | |
16649710 ILT |
2845 | if (sym_index != -1U) |
2846 | { | |
55a93433 ILT |
2847 | sym_index -= first_global_index; |
2848 | gold_assert(sym_index < output_count); | |
2849 | unsigned char* ps = psyms + (sym_index * sym_size); | |
2ea97941 | 2850 | this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx, |
ce279a62 | 2851 | binding, sympool, ps); |
16649710 | 2852 | } |
61ba1cf9 | 2853 | |
16649710 ILT |
2854 | if (dynsym_index != -1U) |
2855 | { | |
2856 | dynsym_index -= first_dynamic_global_index; | |
2857 | gold_assert(dynsym_index < dynamic_count); | |
2858 | unsigned char* pd = dynamic_view + (dynsym_index * sym_size); | |
2ea97941 | 2859 | this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx, |
ce279a62 | 2860 | binding, dynpool, pd); |
16649710 | 2861 | } |
61ba1cf9 ILT |
2862 | } |
2863 | ||
c06b7b0b | 2864 | of->write_output_view(this->offset_, oview_size, psyms); |
16649710 ILT |
2865 | if (dynamic_view != NULL) |
2866 | of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view); | |
2867 | } | |
2868 | ||
2869 | // Write out the symbol SYM, in section SHNDX, to P. POOL is the | |
2870 | // strtab holding the name. | |
2871 | ||
2872 | template<int size, bool big_endian> | |
2873 | void | |
ab5c9e90 ILT |
2874 | Symbol_table::sized_write_symbol( |
2875 | Sized_symbol<size>* sym, | |
2ea97941 ILT |
2876 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
2877 | unsigned int shndx, | |
ce279a62 | 2878 | elfcpp::STB binding, |
ab5c9e90 | 2879 | const Stringpool* pool, |
7d1a9ebb | 2880 | unsigned char* p) const |
16649710 ILT |
2881 | { |
2882 | elfcpp::Sym_write<size, big_endian> osym(p); | |
2883 | osym.put_st_name(pool->get_offset(sym->name())); | |
2ea97941 | 2884 | osym.put_st_value(value); |
58e54ac2 | 2885 | // Use a symbol size of zero for undefined symbols from shared libraries. |
2ea97941 | 2886 | if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj()) |
58e54ac2 CD |
2887 | osym.put_st_size(0); |
2888 | else | |
2889 | osym.put_st_size(sym->symsize()); | |
53d7974c L |
2890 | elfcpp::STT type = sym->type(); |
2891 | // Turn IFUNC symbols from shared libraries into normal FUNC symbols. | |
2892 | if (type == elfcpp::STT_GNU_IFUNC | |
2893 | && sym->is_from_dynobj()) | |
2894 | type = elfcpp::STT_FUNC; | |
55a93433 ILT |
2895 | // A version script may have overridden the default binding. |
2896 | if (sym->is_forced_local()) | |
53d7974c | 2897 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type)); |
55a93433 | 2898 | else |
ce279a62 | 2899 | osym.put_st_info(elfcpp::elf_st_info(binding, type)); |
16649710 | 2900 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis())); |
2ea97941 | 2901 | osym.put_st_shndx(shndx); |
61ba1cf9 ILT |
2902 | } |
2903 | ||
9a2d6984 ILT |
2904 | // Check for unresolved symbols in shared libraries. This is |
2905 | // controlled by the --allow-shlib-undefined option. | |
2906 | ||
2907 | // We only warn about libraries for which we have seen all the | |
2908 | // DT_NEEDED entries. We don't try to track down DT_NEEDED entries | |
2909 | // which were not seen in this link. If we didn't see a DT_NEEDED | |
2910 | // entry, we aren't going to be able to reliably report whether the | |
2911 | // symbol is undefined. | |
2912 | ||
fd9d194f ILT |
2913 | // We also don't warn about libraries found in a system library |
2914 | // directory (e.g., /lib or /usr/lib); we assume that those libraries | |
2915 | // are OK. This heuristic avoids problems on GNU/Linux, in which -ldl | |
2916 | // can have undefined references satisfied by ld-linux.so. | |
9a2d6984 ILT |
2917 | |
2918 | inline void | |
fd9d194f | 2919 | Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const |
9a2d6984 | 2920 | { |
d491d34e | 2921 | bool dummy; |
9a2d6984 ILT |
2922 | if (sym->source() == Symbol::FROM_OBJECT |
2923 | && sym->object()->is_dynamic() | |
d491d34e | 2924 | && sym->shndx(&dummy) == elfcpp::SHN_UNDEF |
9a2d6984 | 2925 | && sym->binding() != elfcpp::STB_WEAK |
8851ecca ILT |
2926 | && !parameters->options().allow_shlib_undefined() |
2927 | && !parameters->target().is_defined_by_abi(sym) | |
fd9d194f | 2928 | && !sym->object()->is_in_system_directory()) |
9a2d6984 ILT |
2929 | { |
2930 | // A very ugly cast. | |
2931 | Dynobj* dynobj = static_cast<Dynobj*>(sym->object()); | |
2932 | if (!dynobj->has_unknown_needed_entries()) | |
f073bbf7 | 2933 | gold_undefined_symbol(sym); |
9a2d6984 ILT |
2934 | } |
2935 | } | |
2936 | ||
a3ad94ed ILT |
2937 | // Write out a section symbol. Return the update offset. |
2938 | ||
2939 | void | |
ca09d69a | 2940 | Symbol_table::write_section_symbol(const Output_section* os, |
d491d34e | 2941 | Output_symtab_xindex* symtab_xindex, |
a3ad94ed ILT |
2942 | Output_file* of, |
2943 | off_t offset) const | |
2944 | { | |
8851ecca | 2945 | switch (parameters->size_and_endianness()) |
a3ad94ed | 2946 | { |
9025d29d | 2947 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca | 2948 | case Parameters::TARGET_32_LITTLE: |
d491d34e ILT |
2949 | this->sized_write_section_symbol<32, false>(os, symtab_xindex, of, |
2950 | offset); | |
8851ecca | 2951 | break; |
9025d29d | 2952 | #endif |
8851ecca ILT |
2953 | #ifdef HAVE_TARGET_32_BIG |
2954 | case Parameters::TARGET_32_BIG: | |
d491d34e ILT |
2955 | this->sized_write_section_symbol<32, true>(os, symtab_xindex, of, |
2956 | offset); | |
8851ecca | 2957 | break; |
9025d29d | 2958 | #endif |
9025d29d | 2959 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca | 2960 | case Parameters::TARGET_64_LITTLE: |
d491d34e ILT |
2961 | this->sized_write_section_symbol<64, false>(os, symtab_xindex, of, |
2962 | offset); | |
8851ecca | 2963 | break; |
9025d29d | 2964 | #endif |
8851ecca ILT |
2965 | #ifdef HAVE_TARGET_64_BIG |
2966 | case Parameters::TARGET_64_BIG: | |
d491d34e ILT |
2967 | this->sized_write_section_symbol<64, true>(os, symtab_xindex, of, |
2968 | offset); | |
8851ecca ILT |
2969 | break; |
2970 | #endif | |
2971 | default: | |
2972 | gold_unreachable(); | |
a3ad94ed | 2973 | } |
a3ad94ed ILT |
2974 | } |
2975 | ||
2976 | // Write out a section symbol, specialized for size and endianness. | |
2977 | ||
2978 | template<int size, bool big_endian> | |
2979 | void | |
2980 | Symbol_table::sized_write_section_symbol(const Output_section* os, | |
d491d34e | 2981 | Output_symtab_xindex* symtab_xindex, |
a3ad94ed ILT |
2982 | Output_file* of, |
2983 | off_t offset) const | |
2984 | { | |
2985 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
2986 | ||
2987 | unsigned char* pov = of->get_output_view(offset, sym_size); | |
2988 | ||
2989 | elfcpp::Sym_write<size, big_endian> osym(pov); | |
2990 | osym.put_st_name(0); | |
b4ecf66b ILT |
2991 | if (parameters->options().relocatable()) |
2992 | osym.put_st_value(0); | |
2993 | else | |
2994 | osym.put_st_value(os->address()); | |
a3ad94ed ILT |
2995 | osym.put_st_size(0); |
2996 | osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, | |
2997 | elfcpp::STT_SECTION)); | |
2998 | osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0)); | |
d491d34e | 2999 | |
2ea97941 ILT |
3000 | unsigned int shndx = os->out_shndx(); |
3001 | if (shndx >= elfcpp::SHN_LORESERVE) | |
d491d34e | 3002 | { |
2ea97941 ILT |
3003 | symtab_xindex->add(os->symtab_index(), shndx); |
3004 | shndx = elfcpp::SHN_XINDEX; | |
d491d34e | 3005 | } |
2ea97941 | 3006 | osym.put_st_shndx(shndx); |
a3ad94ed ILT |
3007 | |
3008 | of->write_output_view(offset, sym_size, pov); | |
3009 | } | |
3010 | ||
abaa3995 ILT |
3011 | // Print statistical information to stderr. This is used for --stats. |
3012 | ||
3013 | void | |
3014 | Symbol_table::print_stats() const | |
3015 | { | |
3016 | #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP) | |
3017 | fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"), | |
3018 | program_name, this->table_.size(), this->table_.bucket_count()); | |
3019 | #else | |
3020 | fprintf(stderr, _("%s: symbol table entries: %zu\n"), | |
3021 | program_name, this->table_.size()); | |
3022 | #endif | |
ad8f37d1 | 3023 | this->namepool_.print_stats("symbol table stringpool"); |
abaa3995 ILT |
3024 | } |
3025 | ||
ff541f30 ILT |
3026 | // We check for ODR violations by looking for symbols with the same |
3027 | // name for which the debugging information reports that they were | |
71ff8986 | 3028 | // defined in disjoint source locations. When comparing the source |
55382fb7 ILT |
3029 | // location, we consider instances with the same base filename to be |
3030 | // the same. This is because different object files/shared libraries | |
3031 | // can include the same header file using different paths, and | |
3032 | // different optimization settings can make the line number appear to | |
3033 | // be a couple lines off, and we don't want to report an ODR violation | |
3034 | // in those cases. | |
ff541f30 ILT |
3035 | |
3036 | // This struct is used to compare line information, as returned by | |
7bf1f802 | 3037 | // Dwarf_line_info::one_addr2line. It implements a < comparison |
71ff8986 | 3038 | // operator used with std::sort. |
ff541f30 ILT |
3039 | |
3040 | struct Odr_violation_compare | |
3041 | { | |
3042 | bool | |
3043 | operator()(const std::string& s1, const std::string& s2) const | |
3044 | { | |
55382fb7 | 3045 | // Inputs should be of the form "dirname/filename:linenum" where |
71ff8986 | 3046 | // "dirname/" is optional. We want to compare just the filename:linenum. |
55382fb7 | 3047 | |
71ff8986 | 3048 | // Find the last '/' in each string. |
55382fb7 ILT |
3049 | std::string::size_type s1begin = s1.rfind('/'); |
3050 | std::string::size_type s2begin = s2.rfind('/'); | |
55382fb7 ILT |
3051 | // If there was no '/' in a string, start at the beginning. |
3052 | if (s1begin == std::string::npos) | |
3053 | s1begin = 0; | |
3054 | if (s2begin == std::string::npos) | |
3055 | s2begin = 0; | |
71ff8986 ILT |
3056 | return s1.compare(s1begin, std::string::npos, |
3057 | s2, s2begin, std::string::npos) < 0; | |
ff541f30 ILT |
3058 | } |
3059 | }; | |
3060 | ||
71ff8986 ILT |
3061 | // Returns all of the lines attached to LOC, not just the one the |
3062 | // instruction actually came from. | |
3063 | std::vector<std::string> | |
3064 | Symbol_table::linenos_from_loc(const Task* task, | |
3065 | const Symbol_location& loc) | |
3066 | { | |
3067 | // We need to lock the object in order to read it. This | |
3068 | // means that we have to run in a singleton Task. If we | |
3069 | // want to run this in a general Task for better | |
3070 | // performance, we will need one Task for object, plus | |
3071 | // appropriate locking to ensure that we don't conflict with | |
3072 | // other uses of the object. Also note, one_addr2line is not | |
3073 | // currently thread-safe. | |
3074 | Task_lock_obj<Object> tl(task, loc.object); | |
3075 | ||
3076 | std::vector<std::string> result; | |
3077 | // 16 is the size of the object-cache that one_addr2line should use. | |
3078 | std::string canonical_result = Dwarf_line_info::one_addr2line( | |
3079 | loc.object, loc.shndx, loc.offset, 16, &result); | |
3080 | if (!canonical_result.empty()) | |
3081 | result.push_back(canonical_result); | |
3082 | return result; | |
3083 | } | |
3084 | ||
3085 | // OutputIterator that records if it was ever assigned to. This | |
3086 | // allows it to be used with std::set_intersection() to check for | |
3087 | // intersection rather than computing the intersection. | |
3088 | struct Check_intersection | |
3089 | { | |
3090 | Check_intersection() | |
3091 | : value_(false) | |
3092 | {} | |
3093 | ||
3094 | bool had_intersection() const | |
3095 | { return this->value_; } | |
3096 | ||
3097 | Check_intersection& operator++() | |
3098 | { return *this; } | |
3099 | ||
3100 | Check_intersection& operator*() | |
3101 | { return *this; } | |
3102 | ||
3103 | template<typename T> | |
3104 | Check_intersection& operator=(const T&) | |
3105 | { | |
3106 | this->value_ = true; | |
3107 | return *this; | |
3108 | } | |
3109 | ||
3110 | private: | |
3111 | bool value_; | |
3112 | }; | |
3113 | ||
70e654ba | 3114 | // Check candidate_odr_violations_ to find symbols with the same name |
71ff8986 ILT |
3115 | // but apparently different definitions (different source-file/line-no |
3116 | // for each line assigned to the first instruction). | |
70e654ba ILT |
3117 | |
3118 | void | |
17a1d0a9 ILT |
3119 | Symbol_table::detect_odr_violations(const Task* task, |
3120 | const char* output_file_name) const | |
70e654ba ILT |
3121 | { |
3122 | for (Odr_map::const_iterator it = candidate_odr_violations_.begin(); | |
3123 | it != candidate_odr_violations_.end(); | |
3124 | ++it) | |
3125 | { | |
71ff8986 ILT |
3126 | const char* const symbol_name = it->first; |
3127 | ||
3128 | std::string first_object_name; | |
3129 | std::vector<std::string> first_object_linenos; | |
3130 | ||
3131 | Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator | |
3132 | locs = it->second.begin(); | |
3133 | const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator | |
3134 | locs_end = it->second.end(); | |
3135 | for (; locs != locs_end && first_object_linenos.empty(); ++locs) | |
70e654ba | 3136 | { |
71ff8986 ILT |
3137 | // Save the line numbers from the first definition to |
3138 | // compare to the other definitions. Ideally, we'd compare | |
3139 | // every definition to every other, but we don't want to | |
3140 | // take O(N^2) time to do this. This shortcut may cause | |
3141 | // false negatives that appear or disappear depending on the | |
3142 | // link order, but it won't cause false positives. | |
3143 | first_object_name = locs->object->name(); | |
3144 | first_object_linenos = this->linenos_from_loc(task, *locs); | |
70e654ba ILT |
3145 | } |
3146 | ||
71ff8986 ILT |
3147 | // Sort by Odr_violation_compare to make std::set_intersection work. |
3148 | std::sort(first_object_linenos.begin(), first_object_linenos.end(), | |
3149 | Odr_violation_compare()); | |
3150 | ||
3151 | for (; locs != locs_end; ++locs) | |
70e654ba | 3152 | { |
71ff8986 ILT |
3153 | std::vector<std::string> linenos = |
3154 | this->linenos_from_loc(task, *locs); | |
3155 | // linenos will be empty if we couldn't parse the debug info. | |
3156 | if (linenos.empty()) | |
3157 | continue; | |
3158 | // Sort by Odr_violation_compare to make std::set_intersection work. | |
3159 | std::sort(linenos.begin(), linenos.end(), Odr_violation_compare()); | |
3160 | ||
3161 | Check_intersection intersection_result = | |
3162 | std::set_intersection(first_object_linenos.begin(), | |
3163 | first_object_linenos.end(), | |
3164 | linenos.begin(), | |
3165 | linenos.end(), | |
3166 | Check_intersection(), | |
3167 | Odr_violation_compare()); | |
3168 | if (!intersection_result.had_intersection()) | |
3169 | { | |
3170 | gold_warning(_("while linking %s: symbol '%s' defined in " | |
3171 | "multiple places (possible ODR violation):"), | |
3172 | output_file_name, demangle(symbol_name).c_str()); | |
3173 | // This only prints one location from each definition, | |
3174 | // which may not be the location we expect to intersect | |
3175 | // with another definition. We could print the whole | |
3176 | // set of locations, but that seems too verbose. | |
3177 | gold_assert(!first_object_linenos.empty()); | |
3178 | gold_assert(!linenos.empty()); | |
3179 | fprintf(stderr, _(" %s from %s\n"), | |
3180 | first_object_linenos[0].c_str(), | |
3181 | first_object_name.c_str()); | |
3182 | fprintf(stderr, _(" %s from %s\n"), | |
3183 | linenos[0].c_str(), | |
3184 | locs->object->name().c_str()); | |
3185 | // Only print one broken pair, to avoid needing to | |
3186 | // compare against a list of the disjoint definition | |
3187 | // locations we've found so far. (If we kept comparing | |
3188 | // against just the first one, we'd get a lot of | |
3189 | // redundant complaints about the second definition | |
3190 | // location.) | |
3191 | break; | |
3192 | } | |
70e654ba ILT |
3193 | } |
3194 | } | |
e4e5049b CS |
3195 | // We only call one_addr2line() in this function, so we can clear its cache. |
3196 | Dwarf_line_info::clear_addr2line_cache(); | |
70e654ba ILT |
3197 | } |
3198 | ||
f6ce93d6 ILT |
3199 | // Warnings functions. |
3200 | ||
3201 | // Add a new warning. | |
3202 | ||
3203 | void | |
2ea97941 | 3204 | Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj, |
cb295612 | 3205 | const std::string& warning) |
f6ce93d6 | 3206 | { |
2ea97941 ILT |
3207 | name = symtab->canonicalize_name(name); |
3208 | this->warnings_[name].set(obj, warning); | |
f6ce93d6 ILT |
3209 | } |
3210 | ||
3211 | // Look through the warnings and mark the symbols for which we should | |
3212 | // warn. This is called during Layout::finalize when we know the | |
3213 | // sources for all the symbols. | |
3214 | ||
3215 | void | |
cb295612 | 3216 | Warnings::note_warnings(Symbol_table* symtab) |
f6ce93d6 ILT |
3217 | { |
3218 | for (Warning_table::iterator p = this->warnings_.begin(); | |
3219 | p != this->warnings_.end(); | |
3220 | ++p) | |
3221 | { | |
3222 | Symbol* sym = symtab->lookup(p->first, NULL); | |
3223 | if (sym != NULL | |
3224 | && sym->source() == Symbol::FROM_OBJECT | |
3225 | && sym->object() == p->second.object) | |
cb295612 | 3226 | sym->set_has_warning(); |
f6ce93d6 ILT |
3227 | } |
3228 | } | |
3229 | ||
3230 | // Issue a warning. This is called when we see a relocation against a | |
3231 | // symbol for which has a warning. | |
3232 | ||
75f2446e | 3233 | template<int size, bool big_endian> |
f6ce93d6 | 3234 | void |
75f2446e ILT |
3235 | Warnings::issue_warning(const Symbol* sym, |
3236 | const Relocate_info<size, big_endian>* relinfo, | |
3237 | size_t relnum, off_t reloffset) const | |
f6ce93d6 | 3238 | { |
a3ad94ed | 3239 | gold_assert(sym->has_warning()); |
f6ce93d6 | 3240 | Warning_table::const_iterator p = this->warnings_.find(sym->name()); |
a3ad94ed | 3241 | gold_assert(p != this->warnings_.end()); |
75f2446e ILT |
3242 | gold_warning_at_location(relinfo, relnum, reloffset, |
3243 | "%s", p->second.text.c_str()); | |
f6ce93d6 ILT |
3244 | } |
3245 | ||
14bfc3f5 ILT |
3246 | // Instantiate the templates we need. We could use the configure |
3247 | // script to restrict this to only the ones needed for implemented | |
3248 | // targets. | |
3249 | ||
c7912668 ILT |
3250 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3251 | template | |
3252 | void | |
3253 | Sized_symbol<32>::allocate_common(Output_data*, Value_type); | |
3254 | #endif | |
3255 | ||
3256 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3257 | template | |
3258 | void | |
3259 | Sized_symbol<64>::allocate_common(Output_data*, Value_type); | |
3260 | #endif | |
3261 | ||
193a53d9 | 3262 | #ifdef HAVE_TARGET_32_LITTLE |
14bfc3f5 ILT |
3263 | template |
3264 | void | |
193a53d9 ILT |
3265 | Symbol_table::add_from_relobj<32, false>( |
3266 | Sized_relobj<32, false>* relobj, | |
f6ce93d6 | 3267 | const unsigned char* syms, |
14bfc3f5 | 3268 | size_t count, |
d491d34e | 3269 | size_t symndx_offset, |
14bfc3f5 ILT |
3270 | const char* sym_names, |
3271 | size_t sym_name_size, | |
ae6dce4d | 3272 | Sized_relobj<32, false>::Symbols* sympointers, |
92de84a6 | 3273 | size_t* defined); |
193a53d9 | 3274 | #endif |
14bfc3f5 | 3275 | |
193a53d9 | 3276 | #ifdef HAVE_TARGET_32_BIG |
14bfc3f5 ILT |
3277 | template |
3278 | void | |
193a53d9 ILT |
3279 | Symbol_table::add_from_relobj<32, true>( |
3280 | Sized_relobj<32, true>* relobj, | |
f6ce93d6 | 3281 | const unsigned char* syms, |
14bfc3f5 | 3282 | size_t count, |
d491d34e | 3283 | size_t symndx_offset, |
14bfc3f5 ILT |
3284 | const char* sym_names, |
3285 | size_t sym_name_size, | |
ae6dce4d | 3286 | Sized_relobj<32, true>::Symbols* sympointers, |
92de84a6 | 3287 | size_t* defined); |
193a53d9 | 3288 | #endif |
14bfc3f5 | 3289 | |
193a53d9 | 3290 | #ifdef HAVE_TARGET_64_LITTLE |
14bfc3f5 ILT |
3291 | template |
3292 | void | |
193a53d9 ILT |
3293 | Symbol_table::add_from_relobj<64, false>( |
3294 | Sized_relobj<64, false>* relobj, | |
f6ce93d6 | 3295 | const unsigned char* syms, |
14bfc3f5 | 3296 | size_t count, |
d491d34e | 3297 | size_t symndx_offset, |
14bfc3f5 ILT |
3298 | const char* sym_names, |
3299 | size_t sym_name_size, | |
ae6dce4d | 3300 | Sized_relobj<64, false>::Symbols* sympointers, |
92de84a6 | 3301 | size_t* defined); |
193a53d9 | 3302 | #endif |
14bfc3f5 | 3303 | |
193a53d9 | 3304 | #ifdef HAVE_TARGET_64_BIG |
14bfc3f5 ILT |
3305 | template |
3306 | void | |
193a53d9 ILT |
3307 | Symbol_table::add_from_relobj<64, true>( |
3308 | Sized_relobj<64, true>* relobj, | |
f6ce93d6 | 3309 | const unsigned char* syms, |
14bfc3f5 | 3310 | size_t count, |
d491d34e | 3311 | size_t symndx_offset, |
14bfc3f5 ILT |
3312 | const char* sym_names, |
3313 | size_t sym_name_size, | |
ae6dce4d | 3314 | Sized_relobj<64, true>::Symbols* sympointers, |
92de84a6 | 3315 | size_t* defined); |
193a53d9 | 3316 | #endif |
14bfc3f5 | 3317 | |
89fc3421 CC |
3318 | #ifdef HAVE_TARGET_32_LITTLE |
3319 | template | |
3320 | Symbol* | |
3321 | Symbol_table::add_from_pluginobj<32, false>( | |
3322 | Sized_pluginobj<32, false>* obj, | |
3323 | const char* name, | |
3324 | const char* ver, | |
3325 | elfcpp::Sym<32, false>* sym); | |
3326 | #endif | |
3327 | ||
3328 | #ifdef HAVE_TARGET_32_BIG | |
3329 | template | |
3330 | Symbol* | |
3331 | Symbol_table::add_from_pluginobj<32, true>( | |
3332 | Sized_pluginobj<32, true>* obj, | |
3333 | const char* name, | |
3334 | const char* ver, | |
3335 | elfcpp::Sym<32, true>* sym); | |
3336 | #endif | |
3337 | ||
3338 | #ifdef HAVE_TARGET_64_LITTLE | |
3339 | template | |
3340 | Symbol* | |
3341 | Symbol_table::add_from_pluginobj<64, false>( | |
3342 | Sized_pluginobj<64, false>* obj, | |
3343 | const char* name, | |
3344 | const char* ver, | |
3345 | elfcpp::Sym<64, false>* sym); | |
3346 | #endif | |
3347 | ||
3348 | #ifdef HAVE_TARGET_64_BIG | |
3349 | template | |
3350 | Symbol* | |
3351 | Symbol_table::add_from_pluginobj<64, true>( | |
3352 | Sized_pluginobj<64, true>* obj, | |
3353 | const char* name, | |
3354 | const char* ver, | |
3355 | elfcpp::Sym<64, true>* sym); | |
3356 | #endif | |
3357 | ||
193a53d9 | 3358 | #ifdef HAVE_TARGET_32_LITTLE |
dbe717ef ILT |
3359 | template |
3360 | void | |
193a53d9 ILT |
3361 | Symbol_table::add_from_dynobj<32, false>( |
3362 | Sized_dynobj<32, false>* dynobj, | |
dbe717ef ILT |
3363 | const unsigned char* syms, |
3364 | size_t count, | |
3365 | const char* sym_names, | |
3366 | size_t sym_name_size, | |
3367 | const unsigned char* versym, | |
3368 | size_t versym_size, | |
92de84a6 ILT |
3369 | const std::vector<const char*>* version_map, |
3370 | Sized_relobj<32, false>::Symbols* sympointers, | |
3371 | size_t* defined); | |
193a53d9 | 3372 | #endif |
dbe717ef | 3373 | |
193a53d9 | 3374 | #ifdef HAVE_TARGET_32_BIG |
dbe717ef ILT |
3375 | template |
3376 | void | |
193a53d9 ILT |
3377 | Symbol_table::add_from_dynobj<32, true>( |
3378 | Sized_dynobj<32, true>* dynobj, | |
dbe717ef ILT |
3379 | const unsigned char* syms, |
3380 | size_t count, | |
3381 | const char* sym_names, | |
3382 | size_t sym_name_size, | |
3383 | const unsigned char* versym, | |
3384 | size_t versym_size, | |
92de84a6 ILT |
3385 | const std::vector<const char*>* version_map, |
3386 | Sized_relobj<32, true>::Symbols* sympointers, | |
3387 | size_t* defined); | |
193a53d9 | 3388 | #endif |
dbe717ef | 3389 | |
193a53d9 | 3390 | #ifdef HAVE_TARGET_64_LITTLE |
dbe717ef ILT |
3391 | template |
3392 | void | |
193a53d9 ILT |
3393 | Symbol_table::add_from_dynobj<64, false>( |
3394 | Sized_dynobj<64, false>* dynobj, | |
dbe717ef ILT |
3395 | const unsigned char* syms, |
3396 | size_t count, | |
3397 | const char* sym_names, | |
3398 | size_t sym_name_size, | |
3399 | const unsigned char* versym, | |
3400 | size_t versym_size, | |
92de84a6 ILT |
3401 | const std::vector<const char*>* version_map, |
3402 | Sized_relobj<64, false>::Symbols* sympointers, | |
3403 | size_t* defined); | |
193a53d9 | 3404 | #endif |
dbe717ef | 3405 | |
193a53d9 | 3406 | #ifdef HAVE_TARGET_64_BIG |
dbe717ef ILT |
3407 | template |
3408 | void | |
193a53d9 ILT |
3409 | Symbol_table::add_from_dynobj<64, true>( |
3410 | Sized_dynobj<64, true>* dynobj, | |
dbe717ef ILT |
3411 | const unsigned char* syms, |
3412 | size_t count, | |
3413 | const char* sym_names, | |
3414 | size_t sym_name_size, | |
3415 | const unsigned char* versym, | |
3416 | size_t versym_size, | |
92de84a6 ILT |
3417 | const std::vector<const char*>* version_map, |
3418 | Sized_relobj<64, true>::Symbols* sympointers, | |
3419 | size_t* defined); | |
193a53d9 | 3420 | #endif |
dbe717ef | 3421 | |
46fe1623 ILT |
3422 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
3423 | template | |
3424 | void | |
fe8718a4 | 3425 | Symbol_table::define_with_copy_reloc<32>( |
fe8718a4 ILT |
3426 | Sized_symbol<32>* sym, |
3427 | Output_data* posd, | |
2ea97941 | 3428 | elfcpp::Elf_types<32>::Elf_Addr value); |
46fe1623 ILT |
3429 | #endif |
3430 | ||
3431 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) | |
3432 | template | |
3433 | void | |
fe8718a4 | 3434 | Symbol_table::define_with_copy_reloc<64>( |
fe8718a4 ILT |
3435 | Sized_symbol<64>* sym, |
3436 | Output_data* posd, | |
2ea97941 | 3437 | elfcpp::Elf_types<64>::Elf_Addr value); |
46fe1623 ILT |
3438 | #endif |
3439 | ||
75f2446e ILT |
3440 | #ifdef HAVE_TARGET_32_LITTLE |
3441 | template | |
3442 | void | |
3443 | Warnings::issue_warning<32, false>(const Symbol* sym, | |
3444 | const Relocate_info<32, false>* relinfo, | |
3445 | size_t relnum, off_t reloffset) const; | |
3446 | #endif | |
3447 | ||
3448 | #ifdef HAVE_TARGET_32_BIG | |
3449 | template | |
3450 | void | |
3451 | Warnings::issue_warning<32, true>(const Symbol* sym, | |
3452 | const Relocate_info<32, true>* relinfo, | |
3453 | size_t relnum, off_t reloffset) const; | |
3454 | #endif | |
3455 | ||
3456 | #ifdef HAVE_TARGET_64_LITTLE | |
3457 | template | |
3458 | void | |
3459 | Warnings::issue_warning<64, false>(const Symbol* sym, | |
3460 | const Relocate_info<64, false>* relinfo, | |
3461 | size_t relnum, off_t reloffset) const; | |
3462 | #endif | |
3463 | ||
3464 | #ifdef HAVE_TARGET_64_BIG | |
3465 | template | |
3466 | void | |
3467 | Warnings::issue_warning<64, true>(const Symbol* sym, | |
3468 | const Relocate_info<64, true>* relinfo, | |
3469 | size_t relnum, off_t reloffset) const; | |
3470 | #endif | |
3471 | ||
14bfc3f5 | 3472 | } // End namespace gold. |