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f6ce93d6 ILT |
1 | // dynobj.h -- dynamic object support for gold -*- C++ -*- |
2 | ||
dde3f402 | 3 | // Copyright 2006, 2007, 2008, 2009, 2010 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 | |
14b31740 ILT |
75 | // Compute the ELF hash code for a string. |
76 | static uint32_t | |
77 | elf_hash(const char*); | |
78 | ||
a3ad94ed ILT |
79 | // Create a standard ELF hash table, setting *PPHASH and *PHASHLEN. |
80 | // DYNSYMS is the global dynamic symbols. LOCAL_DYNSYM_COUNT is the | |
81 | // number of local dynamic symbols, which is the index of the first | |
82 | // dynamic gobal symbol. | |
83 | static void | |
9025d29d | 84 | create_elf_hash_table(const std::vector<Symbol*>& dynsyms, |
a3ad94ed ILT |
85 | unsigned int local_dynsym_count, |
86 | unsigned char** pphash, | |
87 | unsigned int* phashlen); | |
88 | ||
89 | // Create a GNU hash table, setting *PPHASH and *PHASHLEN. DYNSYMS | |
90 | // is the global dynamic symbols. LOCAL_DYNSYM_COUNT is the number | |
91 | // of local dynamic symbols, which is the index of the first dynamic | |
92 | // gobal symbol. | |
93 | static void | |
9025d29d | 94 | create_gnu_hash_table(const std::vector<Symbol*>& dynsyms, |
a3ad94ed ILT |
95 | unsigned int local_dynsym_count, |
96 | unsigned char** pphash, unsigned int* phashlen); | |
97 | ||
98 | protected: | |
99 | // Set the DT_SONAME string. | |
100 | void | |
101 | set_soname_string(const char* s) | |
102 | { this->soname_.assign(s); } | |
103 | ||
e2827e5f ILT |
104 | // Add an entry to the list of DT_NEEDED strings. |
105 | void | |
106 | add_needed(const char* s) | |
107 | { this->needed_.push_back(std::string(s)); } | |
108 | ||
a3ad94ed | 109 | private: |
a3ad94ed ILT |
110 | // Compute the GNU hash code for a string. |
111 | static uint32_t | |
112 | gnu_hash(const char*); | |
113 | ||
114 | // Compute the number of hash buckets to use. | |
115 | static unsigned int | |
116 | compute_bucket_count(const std::vector<uint32_t>& hashcodes, | |
117 | bool for_gnu_hash_table); | |
118 | ||
119 | // Sized version of create_elf_hash_table. | |
120 | template<bool big_endian> | |
121 | static void | |
122 | sized_create_elf_hash_table(const std::vector<uint32_t>& bucket, | |
123 | const std::vector<uint32_t>& chain, | |
124 | unsigned char* phash, | |
125 | unsigned int hashlen); | |
126 | ||
127 | // Sized version of create_gnu_hash_table. | |
128 | template<int size, bool big_endian> | |
129 | static void | |
130 | sized_create_gnu_hash_table(const std::vector<Symbol*>& hashed_dynsyms, | |
131 | const std::vector<uint32_t>& dynsym_hashvals, | |
132 | unsigned int unhashed_dynsym_count, | |
133 | unsigned char** pphash, | |
134 | unsigned int* phashlen); | |
135 | ||
e2827e5f ILT |
136 | // Values for the has_unknown_needed_entries_ field. |
137 | enum Unknown_needed | |
138 | { | |
139 | UNKNOWN_NEEDED_UNSET, | |
140 | UNKNOWN_NEEDED_TRUE, | |
141 | UNKNOWN_NEEDED_FALSE | |
142 | }; | |
143 | ||
a3ad94ed ILT |
144 | // The DT_SONAME name, if any. |
145 | std::string soname_; | |
e2827e5f ILT |
146 | // The list of DT_NEEDED entries. |
147 | Needed needed_; | |
148 | // Whether this dynamic object has any DT_NEEDED entries not seen | |
149 | // during the link. | |
150 | Unknown_needed unknown_needed_; | |
f6ce93d6 ILT |
151 | }; |
152 | ||
153 | // A dynamic object, size and endian specific version. | |
154 | ||
155 | template<int size, bool big_endian> | |
156 | class Sized_dynobj : public Dynobj | |
157 | { | |
158 | public: | |
92de84a6 ILT |
159 | typedef typename Sized_relobj<size, big_endian>::Symbols Symbols; |
160 | ||
f6ce93d6 ILT |
161 | Sized_dynobj(const std::string& name, Input_file* input_file, off_t offset, |
162 | const typename elfcpp::Ehdr<size, big_endian>&); | |
163 | ||
f733487b | 164 | // Set up the object file based on TARGET. |
dbe717ef | 165 | void |
029ba973 | 166 | setup(); |
dbe717ef | 167 | |
f6ce93d6 ILT |
168 | // Read the symbols. |
169 | void | |
170 | do_read_symbols(Read_symbols_data*); | |
171 | ||
172 | // Lay out the input sections. | |
173 | void | |
7e1edb90 | 174 | do_layout(Symbol_table*, Layout*, Read_symbols_data*); |
f6ce93d6 ILT |
175 | |
176 | // Add the symbols to the symbol table. | |
177 | void | |
f488e4b0 | 178 | do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); |
f6ce93d6 | 179 | |
b0193076 RÁE |
180 | Archive::Should_include |
181 | do_should_include_member(Symbol_table* symtab, Read_symbols_data*, | |
182 | std::string* why); | |
183 | ||
a445fddf ILT |
184 | // Get the size of a section. |
185 | uint64_t | |
186 | do_section_size(unsigned int shndx) | |
187 | { return this->elf_file_.section_size(shndx); } | |
188 | ||
dbe717ef ILT |
189 | // Get the name of a section. |
190 | std::string | |
191 | do_section_name(unsigned int shndx) | |
192 | { return this->elf_file_.section_name(shndx); } | |
193 | ||
f6ce93d6 ILT |
194 | // Return a view of the contents of a section. Set *PLEN to the |
195 | // size. | |
dbe717ef ILT |
196 | Object::Location |
197 | do_section_contents(unsigned int shndx) | |
198 | { return this->elf_file_.section_contents(shndx); } | |
f6ce93d6 | 199 | |
a3ad94ed ILT |
200 | // Return section flags. |
201 | uint64_t | |
202 | do_section_flags(unsigned int shndx) | |
203 | { return this->elf_file_.section_flags(shndx); } | |
204 | ||
ef15dade ST |
205 | // Not used for dynobj. |
206 | uint64_t | |
207 | do_section_entsize(unsigned int ) | |
b9f7d72d | 208 | { gold_unreachable(); } |
ef15dade | 209 | |
88dd47ac ILT |
210 | // Return section address. |
211 | uint64_t | |
212 | do_section_address(unsigned int shndx) | |
213 | { return this->elf_file_.section_addr(shndx); } | |
214 | ||
730cdc88 ILT |
215 | // Return section type. |
216 | unsigned int | |
217 | do_section_type(unsigned int shndx) | |
218 | { return this->elf_file_.section_type(shndx); } | |
219 | ||
f7e2ee48 ILT |
220 | // Return the section link field. |
221 | unsigned int | |
222 | do_section_link(unsigned int shndx) | |
223 | { return this->elf_file_.section_link(shndx); } | |
224 | ||
4c50553d ILT |
225 | // Return the section link field. |
226 | unsigned int | |
227 | do_section_info(unsigned int shndx) | |
228 | { return this->elf_file_.section_info(shndx); } | |
229 | ||
a445fddf ILT |
230 | // Return the section alignment. |
231 | uint64_t | |
232 | do_section_addralign(unsigned int shndx) | |
233 | { return this->elf_file_.section_addralign(shndx); } | |
234 | ||
d491d34e ILT |
235 | // Return the Xindex structure to use. |
236 | Xindex* | |
237 | do_initialize_xindex(); | |
238 | ||
92de84a6 ILT |
239 | // Get symbol counts. |
240 | void | |
241 | do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; | |
242 | ||
dde3f402 ILT |
243 | // Get the global symbols. |
244 | const Symbols* | |
245 | do_get_global_symbols() const | |
246 | { return this->symbols_; } | |
247 | ||
dbe717ef ILT |
248 | private: |
249 | // For convenience. | |
250 | typedef Sized_dynobj<size, big_endian> This; | |
251 | static const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
252 | static const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
253 | static const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
254 | typedef elfcpp::Shdr<size, big_endian> Shdr; | |
255 | typedef elfcpp::Dyn<size, big_endian> Dyn; | |
256 | ||
d491d34e ILT |
257 | // Adjust a section index if necessary. |
258 | unsigned int | |
259 | adjust_shndx(unsigned int shndx) | |
260 | { | |
261 | if (shndx >= elfcpp::SHN_LORESERVE) | |
262 | shndx += this->elf_file_.large_shndx_offset(); | |
263 | return shndx; | |
264 | } | |
265 | ||
dbe717ef ILT |
266 | // Find the dynamic symbol table and the version sections, given the |
267 | // section headers. | |
268 | void | |
269 | find_dynsym_sections(const unsigned char* pshdrs, | |
dbe717ef ILT |
270 | unsigned int* pversym_shndx, |
271 | unsigned int* pverdef_shndx, | |
272 | unsigned int* pverneed_shndx, | |
273 | unsigned int* pdynamic_shndx); | |
274 | ||
275 | // Read the dynamic symbol section SHNDX. | |
276 | void | |
277 | read_dynsym_section(const unsigned char* pshdrs, unsigned int shndx, | |
278 | elfcpp::SHT type, unsigned int link, | |
8383303e | 279 | File_view** view, section_size_type* view_size, |
dbe717ef ILT |
280 | unsigned int* view_info); |
281 | ||
e2827e5f | 282 | // Read the dynamic tags. |
dbe717ef | 283 | void |
e2827e5f ILT |
284 | read_dynamic(const unsigned char* pshdrs, unsigned int dynamic_shndx, |
285 | unsigned int strtab_shndx, const unsigned char* strtabu, | |
286 | off_t strtab_size); | |
dbe717ef ILT |
287 | |
288 | // Mapping from version number to version name. | |
289 | typedef std::vector<const char*> Version_map; | |
290 | ||
291 | // Create the version map. | |
292 | void | |
293 | make_version_map(Read_symbols_data* sd, Version_map*) const; | |
294 | ||
14b31740 ILT |
295 | // Add version definitions to the version map. |
296 | void | |
297 | make_verdef_map(Read_symbols_data* sd, Version_map*) const; | |
298 | ||
299 | // Add version references to the version map. | |
300 | void | |
301 | make_verneed_map(Read_symbols_data* sd, Version_map*) const; | |
302 | ||
dbe717ef ILT |
303 | // Add an entry to the version map. |
304 | void | |
305 | set_version_map(Version_map*, unsigned int ndx, const char* name) const; | |
306 | ||
307 | // General access to the ELF file. | |
308 | elfcpp::Elf_file<size, big_endian, Object> elf_file_; | |
d491d34e ILT |
309 | // The section index of the dynamic symbol table. |
310 | unsigned int dynsym_shndx_; | |
92de84a6 ILT |
311 | // The entries in the symbol table for the symbols. We only keep |
312 | // this if we need it to print symbol information. | |
313 | Symbols* symbols_; | |
314 | // Number of defined symbols. | |
315 | size_t defined_count_; | |
f6ce93d6 ILT |
316 | }; |
317 | ||
14b31740 ILT |
318 | // A base class for Verdef and Verneed_version which just handles the |
319 | // version index which will be stored in the SHT_GNU_versym section. | |
320 | ||
321 | class Version_base | |
322 | { | |
323 | public: | |
324 | Version_base() | |
325 | : index_(-1U) | |
326 | { } | |
327 | ||
328 | virtual | |
329 | ~Version_base() | |
330 | { } | |
331 | ||
332 | // Return the version index. | |
333 | unsigned int | |
334 | index() const | |
335 | { | |
336 | gold_assert(this->index_ != -1U); | |
337 | return this->index_; | |
338 | } | |
339 | ||
340 | // Set the version index. | |
341 | void | |
2ea97941 | 342 | set_index(unsigned int index) |
14b31740 ILT |
343 | { |
344 | gold_assert(this->index_ == -1U); | |
2ea97941 | 345 | this->index_ = index; |
14b31740 ILT |
346 | } |
347 | ||
348 | // Clear the weak flag in a version definition. | |
349 | virtual void | |
350 | clear_weak() = 0; | |
351 | ||
352 | private: | |
353 | Version_base(const Version_base&); | |
354 | Version_base& operator=(const Version_base&); | |
355 | ||
356 | // The index of the version definition or reference. | |
357 | unsigned int index_; | |
358 | }; | |
359 | ||
360 | // This class handles a version being defined in the file we are | |
361 | // generating. | |
362 | ||
363 | class Verdef : public Version_base | |
364 | { | |
365 | public: | |
2ea97941 | 366 | Verdef(const char* name, const std::vector<std::string>& deps, |
44ec90b9 | 367 | bool is_base, bool is_weak, bool is_info, bool is_symbol_created) |
2ea97941 | 368 | : name_(name), deps_(deps), is_base_(is_base), is_weak_(is_weak), |
44ec90b9 | 369 | is_info_(is_info), is_symbol_created_(is_symbol_created) |
14b31740 ILT |
370 | { } |
371 | ||
372 | // Return the version name. | |
373 | const char* | |
374 | name() const | |
375 | { return this->name_; } | |
376 | ||
377 | // Return the number of dependencies. | |
378 | unsigned int | |
379 | count_dependencies() const | |
380 | { return this->deps_.size(); } | |
381 | ||
382 | // Add a dependency to this version. The NAME should be | |
383 | // canonicalized in the dynamic Stringpool. | |
384 | void | |
2ea97941 ILT |
385 | add_dependency(const char* name) |
386 | { this->deps_.push_back(name); } | |
14b31740 ILT |
387 | |
388 | // Return whether this definition is weak. | |
389 | bool | |
390 | is_weak() const | |
391 | { return this->is_weak_; } | |
392 | ||
393 | // Clear the weak flag. | |
394 | void | |
395 | clear_weak() | |
396 | { this->is_weak_ = false; } | |
397 | ||
44ec90b9 RO |
398 | // Return whether this definition is informational. |
399 | bool | |
400 | is_info() const | |
401 | { return this->is_info_; } | |
402 | ||
14b31740 ILT |
403 | // Return whether a version symbol has been created for this |
404 | // definition. | |
405 | bool | |
406 | is_symbol_created() const | |
407 | { return this->is_symbol_created_; } | |
408 | ||
409 | // Write contents to buffer. | |
410 | template<int size, bool big_endian> | |
411 | unsigned char* | |
7d1a9ebb | 412 | write(const Stringpool*, bool is_last, unsigned char*) const; |
14b31740 ILT |
413 | |
414 | private: | |
415 | Verdef(const Verdef&); | |
416 | Verdef& operator=(const Verdef&); | |
417 | ||
418 | // The type of the list of version dependencies. Each dependency | |
419 | // should be canonicalized in the dynamic Stringpool. | |
09124467 | 420 | typedef std::vector<std::string> Deps; |
14b31740 ILT |
421 | |
422 | // The name of this version. This should be canonicalized in the | |
423 | // dynamic Stringpool. | |
424 | const char* name_; | |
425 | // A list of other versions which this version depends upon. | |
426 | Deps deps_; | |
427 | // Whether this is the base version. | |
428 | bool is_base_; | |
429 | // Whether this version is weak. | |
430 | bool is_weak_; | |
44ec90b9 RO |
431 | // Whether this version is informational. |
432 | bool is_info_; | |
14b31740 ILT |
433 | // Whether a version symbol has been created. |
434 | bool is_symbol_created_; | |
435 | }; | |
436 | ||
437 | // A referened version. This will be associated with a filename by | |
438 | // Verneed. | |
439 | ||
440 | class Verneed_version : public Version_base | |
441 | { | |
442 | public: | |
2ea97941 ILT |
443 | Verneed_version(const char* version) |
444 | : version_(version) | |
14b31740 ILT |
445 | { } |
446 | ||
447 | // Return the version name. | |
448 | const char* | |
449 | version() const | |
450 | { return this->version_; } | |
451 | ||
452 | // Clear the weak flag. This is invalid for a reference. | |
453 | void | |
454 | clear_weak() | |
455 | { gold_unreachable(); } | |
456 | ||
457 | private: | |
458 | Verneed_version(const Verneed_version&); | |
459 | Verneed_version& operator=(const Verneed_version&); | |
460 | ||
461 | const char* version_; | |
462 | }; | |
463 | ||
464 | // Version references in a single dynamic object. | |
465 | ||
466 | class Verneed | |
467 | { | |
468 | public: | |
2ea97941 ILT |
469 | Verneed(const char* filename) |
470 | : filename_(filename), need_versions_() | |
14b31740 ILT |
471 | { } |
472 | ||
473 | ~Verneed(); | |
474 | ||
475 | // Return the file name. | |
476 | const char* | |
477 | filename() const | |
478 | { return this->filename_; } | |
479 | ||
480 | // Return the number of versions. | |
481 | unsigned int | |
482 | count_versions() const | |
483 | { return this->need_versions_.size(); } | |
484 | ||
485 | // Add a version name. The name should be canonicalized in the | |
486 | // dynamic Stringpool. If the name is already present, this does | |
487 | // nothing. | |
488 | Verneed_version* | |
489 | add_name(const char* name); | |
490 | ||
491 | // Set the version indexes, starting at INDEX. Return the updated | |
492 | // INDEX. | |
493 | unsigned int | |
494 | finalize(unsigned int index); | |
495 | ||
496 | // Write contents to buffer. | |
497 | template<int size, bool big_endian> | |
498 | unsigned char* | |
7d1a9ebb | 499 | write(const Stringpool*, bool is_last, unsigned char*) const; |
14b31740 ILT |
500 | |
501 | private: | |
502 | Verneed(const Verneed&); | |
503 | Verneed& operator=(const Verneed&); | |
504 | ||
505 | // The type of the list of version names. Each name should be | |
506 | // canonicalized in the dynamic Stringpool. | |
507 | typedef std::vector<Verneed_version*> Need_versions; | |
508 | ||
509 | // The filename of the dynamic object. This should be | |
510 | // canonicalized in the dynamic Stringpool. | |
511 | const char* filename_; | |
512 | // The list of version names. | |
513 | Need_versions need_versions_; | |
514 | }; | |
515 | ||
516 | // This class handles version definitions and references which go into | |
517 | // the output file. | |
518 | ||
519 | class Versions | |
520 | { | |
521 | public: | |
a5dc0706 | 522 | Versions(const Version_script_info&, Stringpool*); |
14b31740 ILT |
523 | |
524 | ~Versions(); | |
525 | ||
526 | // SYM is going into the dynamic symbol table and has a version. | |
527 | // Record the appropriate version information. | |
528 | void | |
35cdfc9a | 529 | record_version(const Symbol_table* symtab, Stringpool*, const Symbol* sym); |
14b31740 ILT |
530 | |
531 | // Set the version indexes. DYNSYM_INDEX is the index we should use | |
532 | // for the next dynamic symbol. We add new dynamic symbols to SYMS | |
533 | // and return an updated DYNSYM_INDEX. | |
534 | unsigned int | |
9b07f471 | 535 | finalize(Symbol_table* symtab, unsigned int dynsym_index, |
14b31740 ILT |
536 | std::vector<Symbol*>* syms); |
537 | ||
538 | // Return whether there are any version definitions. | |
539 | bool | |
540 | any_defs() const | |
541 | { return !this->defs_.empty(); } | |
542 | ||
543 | // Return whether there are any version references. | |
544 | bool | |
545 | any_needs() const | |
546 | { return !this->needs_.empty(); } | |
547 | ||
548 | // Build an allocated buffer holding the contents of the symbol | |
549 | // version section (.gnu.version). | |
550 | template<int size, bool big_endian> | |
551 | void | |
46fe1623 ILT |
552 | symbol_section_contents(const Symbol_table*, const Stringpool*, |
553 | unsigned int local_symcount, | |
14b31740 | 554 | const std::vector<Symbol*>& syms, |
7d1a9ebb | 555 | unsigned char**, unsigned int*) const; |
14b31740 ILT |
556 | |
557 | // Build an allocated buffer holding the contents of the version | |
558 | // definition section (.gnu.version_d). | |
559 | template<int size, bool big_endian> | |
560 | void | |
561 | def_section_contents(const Stringpool*, unsigned char**, | |
7d1a9ebb | 562 | unsigned int* psize, unsigned int* pentries) const; |
14b31740 ILT |
563 | |
564 | // Build an allocated buffer holding the contents of the version | |
565 | // reference section (.gnu.version_r). | |
566 | template<int size, bool big_endian> | |
567 | void | |
568 | need_section_contents(const Stringpool*, unsigned char**, | |
7d1a9ebb | 569 | unsigned int* psize, unsigned int* pentries) const; |
14b31740 | 570 | |
09124467 ILT |
571 | const Version_script_info& |
572 | version_script() const | |
573 | { return this->version_script_; } | |
a5dc0706 | 574 | |
14b31740 | 575 | private: |
09124467 ILT |
576 | Versions(const Versions&); |
577 | Versions& operator=(const Versions&); | |
578 | ||
14b31740 ILT |
579 | // The type of the list of version definitions. |
580 | typedef std::vector<Verdef*> Defs; | |
581 | ||
582 | // The type of the list of version references. | |
583 | typedef std::vector<Verneed*> Needs; | |
584 | ||
585 | // Handle a symbol SYM defined with version VERSION. | |
586 | void | |
35cdfc9a | 587 | add_def(const Symbol* sym, const char* version, Stringpool::Key); |
14b31740 ILT |
588 | |
589 | // Add a reference to version NAME in file FILENAME. | |
590 | void | |
591 | add_need(Stringpool*, const char* filename, const char* name, | |
592 | Stringpool::Key); | |
593 | ||
46fe1623 ILT |
594 | // Get the dynamic object to use for SYM. |
595 | Dynobj* | |
596 | get_dynobj_for_sym(const Symbol_table*, const Symbol* sym) const; | |
597 | ||
14b31740 ILT |
598 | // Return the version index to use for SYM. |
599 | unsigned int | |
46fe1623 ILT |
600 | version_index(const Symbol_table*, const Stringpool*, |
601 | const Symbol* sym) const; | |
14b31740 | 602 | |
c5617f2f DK |
603 | // Define the base version of a shared library. |
604 | void | |
605 | define_base_version(Stringpool* dynpool); | |
606 | ||
14b31740 ILT |
607 | // We keep a hash table mapping canonicalized name/version pairs to |
608 | // a version base. | |
609 | typedef std::pair<Stringpool::Key, Stringpool::Key> Key; | |
610 | ||
611 | struct Version_table_hash | |
612 | { | |
613 | size_t | |
614 | operator()(const Key& k) const | |
615 | { return k.first + k.second; } | |
616 | }; | |
617 | ||
618 | struct Version_table_eq | |
619 | { | |
620 | bool | |
621 | operator()(const Key& k1, const Key& k2) const | |
622 | { return k1.first == k2.first && k1.second == k2.second; } | |
623 | }; | |
624 | ||
625 | typedef Unordered_map<Key, Version_base*, Version_table_hash, | |
626 | Version_table_eq> Version_table; | |
627 | ||
628 | // The version definitions. | |
629 | Defs defs_; | |
630 | // The version references. | |
631 | Needs needs_; | |
632 | // The mapping from a canonicalized version/filename pair to a | |
633 | // version index. The filename may be NULL. | |
634 | Version_table version_table_; | |
635 | // Whether the version indexes have been set. | |
636 | bool is_finalized_; | |
09124467 ILT |
637 | // Contents of --version-script, if passed, or NULL. |
638 | const Version_script_info& version_script_; | |
c5617f2f DK |
639 | // Whether we need to insert a base version. This is only used for |
640 | // shared libaries and is cleared when the base version is defined. | |
641 | bool needs_base_version_; | |
14b31740 ILT |
642 | }; |
643 | ||
f6ce93d6 ILT |
644 | } // End namespace gold. |
645 | ||
646 | #endif // !defined(GOLD_DYNOBJ_H) |