Commit | Line | Data |
---|---|---|
f6ce93d6 ILT |
1 | // dynobj.h -- dynamic object support for gold -*- C++ -*- |
2 | ||
b3adc24a | 3 | // Copyright (C) 2006-2020 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 | ||
f6ce93d6 ILT |
23 | #ifndef GOLD_DYNOBJ_H |
24 | #define GOLD_DYNOBJ_H | |
25 | ||
dbe717ef ILT |
26 | #include <vector> |
27 | ||
14b31740 | 28 | #include "stringpool.h" |
f6ce93d6 ILT |
29 | #include "object.h" |
30 | ||
31 | namespace gold | |
32 | { | |
33 | ||
09124467 | 34 | class Version_script_info; |
14b31740 | 35 | |
f6ce93d6 ILT |
36 | // A dynamic object (ET_DYN). This is an abstract base class itself. |
37 | // The implementations is the template class Sized_dynobj. | |
38 | ||
39 | class Dynobj : public Object | |
40 | { | |
41 | public: | |
e2827e5f ILT |
42 | // We keep a list of all the DT_NEEDED entries we find. |
43 | typedef std::vector<std::string> Needed; | |
44 | ||
a7a81c1d | 45 | Dynobj(const std::string& name, Input_file* input_file, off_t offset = 0); |
a3ad94ed ILT |
46 | |
47 | // Return the name to use in a DT_NEEDED entry for this object. | |
48 | const char* | |
e2827e5f ILT |
49 | soname() const |
50 | { return this->soname_.c_str(); } | |
51 | ||
52 | // Return the list of DT_NEEDED strings. | |
53 | const Needed& | |
54 | needed() const | |
55 | { return this->needed_; } | |
56 | ||
57 | // Return whether this dynamic object has any DT_NEEDED entries | |
58 | // which were not seen during the link. | |
59 | bool | |
60 | has_unknown_needed_entries() const | |
61 | { | |
62 | gold_assert(this->unknown_needed_ != UNKNOWN_NEEDED_UNSET); | |
63 | return this->unknown_needed_ == UNKNOWN_NEEDED_TRUE; | |
64 | } | |
65 | ||
66 | // Set whether this dynamic object has any DT_NEEDED entries which | |
67 | // were not seen during the link. | |
68 | void | |
69 | set_has_unknown_needed_entries(bool set) | |
70 | { | |
71 | gold_assert(this->unknown_needed_ == UNKNOWN_NEEDED_UNSET); | |
72 | this->unknown_needed_ = set ? UNKNOWN_NEEDED_TRUE : UNKNOWN_NEEDED_FALSE; | |
73 | } | |
a3ad94ed | 74 | |
48058663 L |
75 | // Return the word size of the object file. |
76 | int | |
77 | elfsize() const | |
78 | { gold_unreachable(); } | |
79 | ||
80 | // Return TRUE if this is a big-endian object file. | |
81 | bool | |
82 | is_big_endian() const | |
83 | { gold_unreachable(); } | |
84 | ||
14b31740 ILT |
85 | // Compute the ELF hash code for a string. |
86 | static uint32_t | |
87 | elf_hash(const char*); | |
88 | ||
a3ad94ed ILT |
89 | // Create a standard ELF hash table, setting *PPHASH and *PHASHLEN. |
90 | // DYNSYMS is the global dynamic symbols. LOCAL_DYNSYM_COUNT is the | |
91 | // number of local dynamic symbols, which is the index of the first | |
92 | // dynamic gobal symbol. | |
93 | static void | |
9025d29d | 94 | create_elf_hash_table(const std::vector<Symbol*>& dynsyms, |
a3ad94ed ILT |
95 | unsigned int local_dynsym_count, |
96 | unsigned char** pphash, | |
97 | unsigned int* phashlen); | |
98 | ||
99 | // Create a GNU hash table, setting *PPHASH and *PHASHLEN. DYNSYMS | |
100 | // is the global dynamic symbols. LOCAL_DYNSYM_COUNT is the number | |
101 | // of local dynamic symbols, which is the index of the first dynamic | |
102 | // gobal symbol. | |
103 | static void | |
9025d29d | 104 | create_gnu_hash_table(const std::vector<Symbol*>& dynsyms, |
a3ad94ed ILT |
105 | unsigned int local_dynsym_count, |
106 | unsigned char** pphash, unsigned int* phashlen); | |
107 | ||
108 | protected: | |
0f1c85a6 CC |
109 | // Return a pointer to this object. |
110 | virtual Dynobj* | |
111 | do_dynobj() | |
112 | { return this; } | |
113 | ||
a3ad94ed ILT |
114 | // Set the DT_SONAME string. |
115 | void | |
116 | set_soname_string(const char* s) | |
117 | { this->soname_.assign(s); } | |
118 | ||
e2827e5f ILT |
119 | // Add an entry to the list of DT_NEEDED strings. |
120 | void | |
121 | add_needed(const char* s) | |
122 | { this->needed_.push_back(std::string(s)); } | |
123 | ||
a3ad94ed | 124 | private: |
a3ad94ed ILT |
125 | // Compute the GNU hash code for a string. |
126 | static uint32_t | |
127 | gnu_hash(const char*); | |
128 | ||
129 | // Compute the number of hash buckets to use. | |
130 | static unsigned int | |
131 | compute_bucket_count(const std::vector<uint32_t>& hashcodes, | |
132 | bool for_gnu_hash_table); | |
133 | ||
134 | // Sized version of create_elf_hash_table. | |
8d9743bd | 135 | template<int size, bool big_endian> |
a3ad94ed ILT |
136 | static void |
137 | sized_create_elf_hash_table(const std::vector<uint32_t>& bucket, | |
138 | const std::vector<uint32_t>& chain, | |
139 | unsigned char* phash, | |
140 | unsigned int hashlen); | |
141 | ||
142 | // Sized version of create_gnu_hash_table. | |
143 | template<int size, bool big_endian> | |
144 | static void | |
145 | sized_create_gnu_hash_table(const std::vector<Symbol*>& hashed_dynsyms, | |
146 | const std::vector<uint32_t>& dynsym_hashvals, | |
147 | unsigned int unhashed_dynsym_count, | |
148 | unsigned char** pphash, | |
149 | unsigned int* phashlen); | |
150 | ||
e2827e5f ILT |
151 | // Values for the has_unknown_needed_entries_ field. |
152 | enum Unknown_needed | |
153 | { | |
154 | UNKNOWN_NEEDED_UNSET, | |
155 | UNKNOWN_NEEDED_TRUE, | |
156 | UNKNOWN_NEEDED_FALSE | |
157 | }; | |
158 | ||
a3ad94ed ILT |
159 | // The DT_SONAME name, if any. |
160 | std::string soname_; | |
e2827e5f ILT |
161 | // The list of DT_NEEDED entries. |
162 | Needed needed_; | |
163 | // Whether this dynamic object has any DT_NEEDED entries not seen | |
164 | // during the link. | |
165 | Unknown_needed unknown_needed_; | |
f6ce93d6 ILT |
166 | }; |
167 | ||
168 | // A dynamic object, size and endian specific version. | |
169 | ||
170 | template<int size, bool big_endian> | |
171 | class Sized_dynobj : public Dynobj | |
172 | { | |
173 | public: | |
6fa2a40b | 174 | typedef typename Sized_relobj_file<size, big_endian>::Symbols Symbols; |
92de84a6 | 175 | |
f6ce93d6 ILT |
176 | Sized_dynobj(const std::string& name, Input_file* input_file, off_t offset, |
177 | const typename elfcpp::Ehdr<size, big_endian>&); | |
178 | ||
f733487b | 179 | // Set up the object file based on TARGET. |
dbe717ef | 180 | void |
029ba973 | 181 | setup(); |
dbe717ef | 182 | |
f6ce93d6 ILT |
183 | // Read the symbols. |
184 | void | |
185 | do_read_symbols(Read_symbols_data*); | |
186 | ||
187 | // Lay out the input sections. | |
188 | void | |
7e1edb90 | 189 | do_layout(Symbol_table*, Layout*, Read_symbols_data*); |
f6ce93d6 ILT |
190 | |
191 | // Add the symbols to the symbol table. | |
192 | void | |
f488e4b0 | 193 | do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); |
f6ce93d6 | 194 | |
b0193076 | 195 | Archive::Should_include |
88a4108b | 196 | do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, |
b0193076 RÁE |
197 | std::string* why); |
198 | ||
e0c52780 CC |
199 | // Iterate over global symbols, calling a visitor class V for each. |
200 | void | |
201 | do_for_all_global_symbols(Read_symbols_data* sd, | |
202 | Library_base::Symbol_visitor_base* v); | |
203 | ||
cdc29364 CC |
204 | // Iterate over local symbols, calling a visitor class V for each GOT offset |
205 | // associated with a local symbol. | |
206 | void | |
207 | do_for_all_local_got_entries(Got_offset_list::Visitor* v) const; | |
208 | ||
a445fddf ILT |
209 | // Get the size of a section. |
210 | uint64_t | |
211 | do_section_size(unsigned int shndx) | |
212 | { return this->elf_file_.section_size(shndx); } | |
213 | ||
dbe717ef ILT |
214 | // Get the name of a section. |
215 | std::string | |
54674d38 | 216 | do_section_name(unsigned int shndx) const |
dbe717ef ILT |
217 | { return this->elf_file_.section_name(shndx); } |
218 | ||
f6ce93d6 ILT |
219 | // Return a view of the contents of a section. Set *PLEN to the |
220 | // size. | |
c1027032 CC |
221 | const unsigned char* |
222 | do_section_contents(unsigned int shndx, section_size_type* plen, | |
223 | bool cache) | |
224 | { | |
225 | Location loc(this->elf_file_.section_contents(shndx)); | |
226 | *plen = convert_to_section_size_type(loc.data_size); | |
227 | if (*plen == 0) | |
228 | { | |
229 | static const unsigned char empty[1] = { '\0' }; | |
230 | return empty; | |
231 | } | |
232 | return this->get_view(loc.file_offset, *plen, true, cache); | |
233 | } | |
f6ce93d6 | 234 | |
a3ad94ed ILT |
235 | // Return section flags. |
236 | uint64_t | |
237 | do_section_flags(unsigned int shndx) | |
238 | { return this->elf_file_.section_flags(shndx); } | |
239 | ||
ef15dade ST |
240 | // Not used for dynobj. |
241 | uint64_t | |
242 | do_section_entsize(unsigned int ) | |
b9f7d72d | 243 | { gold_unreachable(); } |
ef15dade | 244 | |
88dd47ac ILT |
245 | // Return section address. |
246 | uint64_t | |
247 | do_section_address(unsigned int shndx) | |
248 | { return this->elf_file_.section_addr(shndx); } | |
249 | ||
730cdc88 ILT |
250 | // Return section type. |
251 | unsigned int | |
252 | do_section_type(unsigned int shndx) | |
253 | { return this->elf_file_.section_type(shndx); } | |
254 | ||
f7e2ee48 ILT |
255 | // Return the section link field. |
256 | unsigned int | |
257 | do_section_link(unsigned int shndx) | |
258 | { return this->elf_file_.section_link(shndx); } | |
259 | ||
4c50553d ILT |
260 | // Return the section link field. |
261 | unsigned int | |
262 | do_section_info(unsigned int shndx) | |
263 | { return this->elf_file_.section_info(shndx); } | |
264 | ||
a445fddf ILT |
265 | // Return the section alignment. |
266 | uint64_t | |
267 | do_section_addralign(unsigned int shndx) | |
268 | { return this->elf_file_.section_addralign(shndx); } | |
269 | ||
d491d34e ILT |
270 | // Return the Xindex structure to use. |
271 | Xindex* | |
272 | do_initialize_xindex(); | |
273 | ||
92de84a6 ILT |
274 | // Get symbol counts. |
275 | void | |
276 | do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; | |
277 | ||
dde3f402 ILT |
278 | // Get the global symbols. |
279 | const Symbols* | |
280 | do_get_global_symbols() const | |
281 | { return this->symbols_; } | |
282 | ||
f35c4853 CC |
283 | protected: |
284 | // Read the symbols. This is common code for all target-specific | |
285 | // overrides of do_read_symbols(). | |
286 | void | |
287 | base_read_symbols(Read_symbols_data*); | |
288 | ||
dbe717ef ILT |
289 | private: |
290 | // For convenience. | |
291 | typedef Sized_dynobj<size, big_endian> This; | |
292 | static const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
293 | static const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
294 | static const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
295 | typedef elfcpp::Shdr<size, big_endian> Shdr; | |
296 | typedef elfcpp::Dyn<size, big_endian> Dyn; | |
297 | ||
d491d34e ILT |
298 | // Adjust a section index if necessary. |
299 | unsigned int | |
300 | adjust_shndx(unsigned int shndx) | |
301 | { | |
302 | if (shndx >= elfcpp::SHN_LORESERVE) | |
303 | shndx += this->elf_file_.large_shndx_offset(); | |
304 | return shndx; | |
305 | } | |
306 | ||
dbe717ef ILT |
307 | // Find the dynamic symbol table and the version sections, given the |
308 | // section headers. | |
309 | void | |
310 | find_dynsym_sections(const unsigned char* pshdrs, | |
dbe717ef ILT |
311 | unsigned int* pversym_shndx, |
312 | unsigned int* pverdef_shndx, | |
313 | unsigned int* pverneed_shndx, | |
314 | unsigned int* pdynamic_shndx); | |
315 | ||
316 | // Read the dynamic symbol section SHNDX. | |
317 | void | |
318 | read_dynsym_section(const unsigned char* pshdrs, unsigned int shndx, | |
319 | elfcpp::SHT type, unsigned int link, | |
8383303e | 320 | File_view** view, section_size_type* view_size, |
dbe717ef ILT |
321 | unsigned int* view_info); |
322 | ||
e2827e5f | 323 | // Read the dynamic tags. |
dbe717ef | 324 | void |
e2827e5f ILT |
325 | read_dynamic(const unsigned char* pshdrs, unsigned int dynamic_shndx, |
326 | unsigned int strtab_shndx, const unsigned char* strtabu, | |
327 | off_t strtab_size); | |
dbe717ef ILT |
328 | |
329 | // Mapping from version number to version name. | |
330 | typedef std::vector<const char*> Version_map; | |
331 | ||
332 | // Create the version map. | |
333 | void | |
334 | make_version_map(Read_symbols_data* sd, Version_map*) const; | |
335 | ||
14b31740 ILT |
336 | // Add version definitions to the version map. |
337 | void | |
338 | make_verdef_map(Read_symbols_data* sd, Version_map*) const; | |
339 | ||
340 | // Add version references to the version map. | |
341 | void | |
342 | make_verneed_map(Read_symbols_data* sd, Version_map*) const; | |
343 | ||
dbe717ef ILT |
344 | // Add an entry to the version map. |
345 | void | |
346 | set_version_map(Version_map*, unsigned int ndx, const char* name) const; | |
347 | ||
348 | // General access to the ELF file. | |
349 | elfcpp::Elf_file<size, big_endian, Object> elf_file_; | |
d491d34e ILT |
350 | // The section index of the dynamic symbol table. |
351 | unsigned int dynsym_shndx_; | |
92de84a6 ILT |
352 | // The entries in the symbol table for the symbols. We only keep |
353 | // this if we need it to print symbol information. | |
354 | Symbols* symbols_; | |
355 | // Number of defined symbols. | |
356 | size_t defined_count_; | |
f6ce93d6 ILT |
357 | }; |
358 | ||
14b31740 ILT |
359 | // A base class for Verdef and Verneed_version which just handles the |
360 | // version index which will be stored in the SHT_GNU_versym section. | |
361 | ||
362 | class Version_base | |
363 | { | |
364 | public: | |
365 | Version_base() | |
366 | : index_(-1U) | |
367 | { } | |
368 | ||
369 | virtual | |
370 | ~Version_base() | |
371 | { } | |
372 | ||
373 | // Return the version index. | |
374 | unsigned int | |
375 | index() const | |
376 | { | |
377 | gold_assert(this->index_ != -1U); | |
378 | return this->index_; | |
379 | } | |
380 | ||
381 | // Set the version index. | |
382 | void | |
2ea97941 | 383 | set_index(unsigned int index) |
14b31740 ILT |
384 | { |
385 | gold_assert(this->index_ == -1U); | |
2ea97941 | 386 | this->index_ = index; |
14b31740 ILT |
387 | } |
388 | ||
389 | // Clear the weak flag in a version definition. | |
390 | virtual void | |
391 | clear_weak() = 0; | |
392 | ||
393 | private: | |
394 | Version_base(const Version_base&); | |
395 | Version_base& operator=(const Version_base&); | |
396 | ||
397 | // The index of the version definition or reference. | |
398 | unsigned int index_; | |
399 | }; | |
400 | ||
401 | // This class handles a version being defined in the file we are | |
402 | // generating. | |
403 | ||
404 | class Verdef : public Version_base | |
405 | { | |
406 | public: | |
2ea97941 | 407 | Verdef(const char* name, const std::vector<std::string>& deps, |
44ec90b9 | 408 | bool is_base, bool is_weak, bool is_info, bool is_symbol_created) |
2ea97941 | 409 | : name_(name), deps_(deps), is_base_(is_base), is_weak_(is_weak), |
44ec90b9 | 410 | is_info_(is_info), is_symbol_created_(is_symbol_created) |
14b31740 ILT |
411 | { } |
412 | ||
413 | // Return the version name. | |
414 | const char* | |
415 | name() const | |
416 | { return this->name_; } | |
417 | ||
418 | // Return the number of dependencies. | |
419 | unsigned int | |
420 | count_dependencies() const | |
421 | { return this->deps_.size(); } | |
422 | ||
423 | // Add a dependency to this version. The NAME should be | |
424 | // canonicalized in the dynamic Stringpool. | |
425 | void | |
2ea97941 ILT |
426 | add_dependency(const char* name) |
427 | { this->deps_.push_back(name); } | |
14b31740 ILT |
428 | |
429 | // Return whether this definition is weak. | |
430 | bool | |
431 | is_weak() const | |
432 | { return this->is_weak_; } | |
433 | ||
434 | // Clear the weak flag. | |
435 | void | |
436 | clear_weak() | |
437 | { this->is_weak_ = false; } | |
438 | ||
44ec90b9 RO |
439 | // Return whether this definition is informational. |
440 | bool | |
441 | is_info() const | |
442 | { return this->is_info_; } | |
443 | ||
14b31740 ILT |
444 | // Return whether a version symbol has been created for this |
445 | // definition. | |
446 | bool | |
447 | is_symbol_created() const | |
448 | { return this->is_symbol_created_; } | |
449 | ||
450 | // Write contents to buffer. | |
451 | template<int size, bool big_endian> | |
452 | unsigned char* | |
7d1a9ebb | 453 | write(const Stringpool*, bool is_last, unsigned char*) const; |
14b31740 ILT |
454 | |
455 | private: | |
456 | Verdef(const Verdef&); | |
457 | Verdef& operator=(const Verdef&); | |
458 | ||
459 | // The type of the list of version dependencies. Each dependency | |
460 | // should be canonicalized in the dynamic Stringpool. | |
09124467 | 461 | typedef std::vector<std::string> Deps; |
14b31740 ILT |
462 | |
463 | // The name of this version. This should be canonicalized in the | |
464 | // dynamic Stringpool. | |
465 | const char* name_; | |
466 | // A list of other versions which this version depends upon. | |
467 | Deps deps_; | |
468 | // Whether this is the base version. | |
469 | bool is_base_; | |
470 | // Whether this version is weak. | |
471 | bool is_weak_; | |
44ec90b9 RO |
472 | // Whether this version is informational. |
473 | bool is_info_; | |
14b31740 ILT |
474 | // Whether a version symbol has been created. |
475 | bool is_symbol_created_; | |
476 | }; | |
477 | ||
478 | // A referened version. This will be associated with a filename by | |
479 | // Verneed. | |
480 | ||
481 | class Verneed_version : public Version_base | |
482 | { | |
483 | public: | |
2ea97941 ILT |
484 | Verneed_version(const char* version) |
485 | : version_(version) | |
14b31740 ILT |
486 | { } |
487 | ||
488 | // Return the version name. | |
489 | const char* | |
490 | version() const | |
491 | { return this->version_; } | |
492 | ||
493 | // Clear the weak flag. This is invalid for a reference. | |
494 | void | |
495 | clear_weak() | |
496 | { gold_unreachable(); } | |
497 | ||
498 | private: | |
499 | Verneed_version(const Verneed_version&); | |
500 | Verneed_version& operator=(const Verneed_version&); | |
501 | ||
502 | const char* version_; | |
503 | }; | |
504 | ||
505 | // Version references in a single dynamic object. | |
506 | ||
507 | class Verneed | |
508 | { | |
509 | public: | |
2ea97941 ILT |
510 | Verneed(const char* filename) |
511 | : filename_(filename), need_versions_() | |
14b31740 ILT |
512 | { } |
513 | ||
514 | ~Verneed(); | |
515 | ||
516 | // Return the file name. | |
517 | const char* | |
518 | filename() const | |
519 | { return this->filename_; } | |
520 | ||
521 | // Return the number of versions. | |
522 | unsigned int | |
523 | count_versions() const | |
524 | { return this->need_versions_.size(); } | |
525 | ||
526 | // Add a version name. The name should be canonicalized in the | |
527 | // dynamic Stringpool. If the name is already present, this does | |
528 | // nothing. | |
529 | Verneed_version* | |
530 | add_name(const char* name); | |
531 | ||
532 | // Set the version indexes, starting at INDEX. Return the updated | |
533 | // INDEX. | |
534 | unsigned int | |
535 | finalize(unsigned int index); | |
536 | ||
537 | // Write contents to buffer. | |
538 | template<int size, bool big_endian> | |
539 | unsigned char* | |
7d1a9ebb | 540 | write(const Stringpool*, bool is_last, unsigned char*) const; |
14b31740 ILT |
541 | |
542 | private: | |
543 | Verneed(const Verneed&); | |
544 | Verneed& operator=(const Verneed&); | |
545 | ||
546 | // The type of the list of version names. Each name should be | |
547 | // canonicalized in the dynamic Stringpool. | |
548 | typedef std::vector<Verneed_version*> Need_versions; | |
549 | ||
550 | // The filename of the dynamic object. This should be | |
551 | // canonicalized in the dynamic Stringpool. | |
552 | const char* filename_; | |
553 | // The list of version names. | |
554 | Need_versions need_versions_; | |
555 | }; | |
556 | ||
557 | // This class handles version definitions and references which go into | |
558 | // the output file. | |
559 | ||
560 | class Versions | |
561 | { | |
562 | public: | |
a5dc0706 | 563 | Versions(const Version_script_info&, Stringpool*); |
14b31740 ILT |
564 | |
565 | ~Versions(); | |
566 | ||
567 | // SYM is going into the dynamic symbol table and has a version. | |
568 | // Record the appropriate version information. | |
569 | void | |
35cdfc9a | 570 | record_version(const Symbol_table* symtab, Stringpool*, const Symbol* sym); |
14b31740 ILT |
571 | |
572 | // Set the version indexes. DYNSYM_INDEX is the index we should use | |
573 | // for the next dynamic symbol. We add new dynamic symbols to SYMS | |
574 | // and return an updated DYNSYM_INDEX. | |
575 | unsigned int | |
9b07f471 | 576 | finalize(Symbol_table* symtab, unsigned int dynsym_index, |
14b31740 ILT |
577 | std::vector<Symbol*>* syms); |
578 | ||
579 | // Return whether there are any version definitions. | |
580 | bool | |
581 | any_defs() const | |
582 | { return !this->defs_.empty(); } | |
583 | ||
584 | // Return whether there are any version references. | |
585 | bool | |
586 | any_needs() const | |
587 | { return !this->needs_.empty(); } | |
588 | ||
589 | // Build an allocated buffer holding the contents of the symbol | |
590 | // version section (.gnu.version). | |
591 | template<int size, bool big_endian> | |
592 | void | |
46fe1623 ILT |
593 | symbol_section_contents(const Symbol_table*, const Stringpool*, |
594 | unsigned int local_symcount, | |
14b31740 | 595 | const std::vector<Symbol*>& syms, |
7d1a9ebb | 596 | unsigned char**, unsigned int*) const; |
14b31740 ILT |
597 | |
598 | // Build an allocated buffer holding the contents of the version | |
599 | // definition section (.gnu.version_d). | |
600 | template<int size, bool big_endian> | |
601 | void | |
602 | def_section_contents(const Stringpool*, unsigned char**, | |
7d1a9ebb | 603 | unsigned int* psize, unsigned int* pentries) const; |
14b31740 ILT |
604 | |
605 | // Build an allocated buffer holding the contents of the version | |
606 | // reference section (.gnu.version_r). | |
607 | template<int size, bool big_endian> | |
608 | void | |
609 | need_section_contents(const Stringpool*, unsigned char**, | |
7d1a9ebb | 610 | unsigned int* psize, unsigned int* pentries) const; |
14b31740 | 611 | |
09124467 ILT |
612 | const Version_script_info& |
613 | version_script() const | |
614 | { return this->version_script_; } | |
a5dc0706 | 615 | |
14b31740 | 616 | private: |
09124467 ILT |
617 | Versions(const Versions&); |
618 | Versions& operator=(const Versions&); | |
619 | ||
14b31740 ILT |
620 | // The type of the list of version definitions. |
621 | typedef std::vector<Verdef*> Defs; | |
622 | ||
623 | // The type of the list of version references. | |
624 | typedef std::vector<Verneed*> Needs; | |
625 | ||
626 | // Handle a symbol SYM defined with version VERSION. | |
627 | void | |
21131061 ILT |
628 | add_def(Stringpool*, const Symbol* sym, const char* version, |
629 | Stringpool::Key); | |
14b31740 ILT |
630 | |
631 | // Add a reference to version NAME in file FILENAME. | |
632 | void | |
633 | add_need(Stringpool*, const char* filename, const char* name, | |
634 | Stringpool::Key); | |
635 | ||
46fe1623 ILT |
636 | // Get the dynamic object to use for SYM. |
637 | Dynobj* | |
638 | get_dynobj_for_sym(const Symbol_table*, const Symbol* sym) const; | |
639 | ||
14b31740 ILT |
640 | // Return the version index to use for SYM. |
641 | unsigned int | |
46fe1623 ILT |
642 | version_index(const Symbol_table*, const Stringpool*, |
643 | const Symbol* sym) const; | |
14b31740 | 644 | |
c5617f2f DK |
645 | // Define the base version of a shared library. |
646 | void | |
647 | define_base_version(Stringpool* dynpool); | |
648 | ||
14b31740 ILT |
649 | // We keep a hash table mapping canonicalized name/version pairs to |
650 | // a version base. | |
651 | typedef std::pair<Stringpool::Key, Stringpool::Key> Key; | |
652 | ||
653 | struct Version_table_hash | |
654 | { | |
655 | size_t | |
656 | operator()(const Key& k) const | |
657 | { return k.first + k.second; } | |
658 | }; | |
659 | ||
660 | struct Version_table_eq | |
661 | { | |
662 | bool | |
663 | operator()(const Key& k1, const Key& k2) const | |
664 | { return k1.first == k2.first && k1.second == k2.second; } | |
665 | }; | |
666 | ||
667 | typedef Unordered_map<Key, Version_base*, Version_table_hash, | |
668 | Version_table_eq> Version_table; | |
669 | ||
670 | // The version definitions. | |
671 | Defs defs_; | |
672 | // The version references. | |
673 | Needs needs_; | |
674 | // The mapping from a canonicalized version/filename pair to a | |
675 | // version index. The filename may be NULL. | |
676 | Version_table version_table_; | |
677 | // Whether the version indexes have been set. | |
678 | bool is_finalized_; | |
09124467 ILT |
679 | // Contents of --version-script, if passed, or NULL. |
680 | const Version_script_info& version_script_; | |
c5617f2f | 681 | // Whether we need to insert a base version. This is only used for |
cc643b88 | 682 | // shared libraries and is cleared when the base version is defined. |
c5617f2f | 683 | bool needs_base_version_; |
14b31740 ILT |
684 | }; |
685 | ||
f6ce93d6 ILT |
686 | } // End namespace gold. |
687 | ||
688 | #endif // !defined(GOLD_DYNOBJ_H) |