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