Commit | Line | Data |
---|---|---|
bae7f79e ILT |
1 | // object.h -- support for an object file for linking in gold -*- C++ -*- |
2 | ||
3 | #ifndef GOLD_OBJECT_H | |
4 | #define GOLD_OBJECT_H | |
5 | ||
14bfc3f5 | 6 | #include <cassert> |
92e059d8 | 7 | #include <string> |
a2fb1b05 | 8 | #include <vector> |
14bfc3f5 | 9 | |
bae7f79e | 10 | #include "elfcpp.h" |
645f8123 | 11 | #include "elfcpp_file.h" |
bae7f79e | 12 | #include "fileread.h" |
14bfc3f5 | 13 | #include "target.h" |
bae7f79e ILT |
14 | |
15 | namespace gold | |
16 | { | |
17 | ||
92e059d8 | 18 | class General_options; |
75f65a3e | 19 | class Stringpool; |
a2fb1b05 | 20 | class Layout; |
61ba1cf9 ILT |
21 | class Output_section; |
22 | class Output_file; | |
f6ce93d6 | 23 | class Dynobj; |
a2fb1b05 | 24 | |
bae7f79e ILT |
25 | // Data to pass from read_symbols() to add_symbols(). |
26 | ||
27 | struct Read_symbols_data | |
28 | { | |
12e14209 ILT |
29 | // Section headers. |
30 | File_view* section_headers; | |
31 | // Section names. | |
32 | File_view* section_names; | |
33 | // Size of section name data in bytes. | |
34 | off_t section_names_size; | |
bae7f79e ILT |
35 | // Symbol data. |
36 | File_view* symbols; | |
37 | // Size of symbol data in bytes. | |
38 | off_t symbols_size; | |
39 | // Symbol names. | |
40 | File_view* symbol_names; | |
41 | // Size of symbol name data in bytes. | |
42 | off_t symbol_names_size; | |
dbe717ef ILT |
43 | |
44 | // Version information. This is only used on dynamic objects. | |
45 | // Version symbol data (from SHT_GNU_versym section). | |
46 | File_view* versym; | |
47 | off_t versym_size; | |
48 | // Version definition data (from SHT_GNU_verdef section). | |
49 | File_view* verdef; | |
50 | off_t verdef_size; | |
51 | unsigned int verdef_info; | |
52 | // Needed version data (from SHT_GNU_verneed section). | |
53 | File_view* verneed; | |
54 | off_t verneed_size; | |
55 | unsigned int verneed_info; | |
bae7f79e ILT |
56 | }; |
57 | ||
92e059d8 ILT |
58 | // Data about a single relocation section. This is read in |
59 | // read_relocs and processed in scan_relocs. | |
60 | ||
61 | struct Section_relocs | |
62 | { | |
63 | // Index of reloc section. | |
64 | unsigned int reloc_shndx; | |
65 | // Index of section that relocs apply to. | |
66 | unsigned int data_shndx; | |
67 | // Contents of reloc section. | |
68 | File_view* contents; | |
69 | // Reloc section type. | |
70 | unsigned int sh_type; | |
71 | // Number of reloc entries. | |
72 | size_t reloc_count; | |
73 | }; | |
74 | ||
75 | // Relocations in an object file. This is read in read_relocs and | |
76 | // processed in scan_relocs. | |
77 | ||
78 | struct Read_relocs_data | |
79 | { | |
80 | typedef std::vector<Section_relocs> Relocs_list; | |
81 | // The relocations. | |
82 | Relocs_list relocs; | |
83 | // The local symbols. | |
84 | File_view* local_symbols; | |
85 | }; | |
86 | ||
f6ce93d6 ILT |
87 | // Object is an abstract base class which represents either a 32-bit |
88 | // or a 64-bit input object. This can be a regular object file | |
89 | // (ET_REL) or a shared object (ET_DYN). | |
bae7f79e ILT |
90 | |
91 | class Object | |
92 | { | |
93 | public: | |
94 | // NAME is the name of the object as we would report it to the user | |
95 | // (e.g., libfoo.a(bar.o) if this is in an archive. INPUT_FILE is | |
96 | // used to read the file. OFFSET is the offset within the input | |
97 | // file--0 for a .o or .so file, something else for a .a file. | |
14bfc3f5 ILT |
98 | Object(const std::string& name, Input_file* input_file, bool is_dynamic, |
99 | off_t offset = 0) | |
dbe717ef | 100 | : name_(name), input_file_(input_file), offset_(offset), shnum_(-1U), |
f6ce93d6 | 101 | is_dynamic_(is_dynamic), target_(NULL) |
bae7f79e ILT |
102 | { } |
103 | ||
104 | virtual ~Object() | |
105 | { } | |
106 | ||
14bfc3f5 | 107 | // Return the name of the object as we would report it to the tuser. |
bae7f79e ILT |
108 | const std::string& |
109 | name() const | |
110 | { return this->name_; } | |
111 | ||
14bfc3f5 ILT |
112 | // Return whether this is a dynamic object. |
113 | bool | |
114 | is_dynamic() const | |
115 | { return this->is_dynamic_; } | |
116 | ||
14bfc3f5 ILT |
117 | // Return the target structure associated with this object. |
118 | Target* | |
a2fb1b05 | 119 | target() const |
14bfc3f5 ILT |
120 | { return this->target_; } |
121 | ||
a2fb1b05 ILT |
122 | // Lock the underlying file. |
123 | void | |
124 | lock() | |
125 | { this->input_file_->file().lock(); } | |
126 | ||
127 | // Unlock the underlying file. | |
128 | void | |
129 | unlock() | |
130 | { this->input_file_->file().unlock(); } | |
131 | ||
132 | // Return whether the underlying file is locked. | |
133 | bool | |
134 | is_locked() const | |
135 | { return this->input_file_->file().is_locked(); } | |
136 | ||
14bfc3f5 ILT |
137 | // Return the sized target structure associated with this object. |
138 | // This is like the target method but it returns a pointer of | |
139 | // appropriate checked type. | |
140 | template<int size, bool big_endian> | |
141 | Sized_target<size, big_endian>* | |
5482377d | 142 | sized_target(ACCEPT_SIZE_ENDIAN_ONLY); |
bae7f79e | 143 | |
92e059d8 | 144 | // Read the symbol information. |
12e14209 ILT |
145 | void |
146 | read_symbols(Read_symbols_data* sd) | |
147 | { return this->do_read_symbols(sd); } | |
a2fb1b05 | 148 | |
92e059d8 ILT |
149 | // Pass sections which should be included in the link to the Layout |
150 | // object, and record where the sections go in the output file. | |
151 | void | |
f6ce93d6 ILT |
152 | layout(const General_options& options, Symbol_table* symtab, |
153 | Layout* layout, Read_symbols_data* sd) | |
154 | { this->do_layout(options, symtab, layout, sd); } | |
92e059d8 | 155 | |
a2fb1b05 ILT |
156 | // Add symbol information to the global symbol table. |
157 | void | |
12e14209 ILT |
158 | add_symbols(Symbol_table* symtab, Read_symbols_data* sd) |
159 | { this->do_add_symbols(symtab, sd); } | |
a2fb1b05 | 160 | |
f6ce93d6 ILT |
161 | // Return a view of the contents of a section. Set *PLEN to the |
162 | // size. | |
163 | const unsigned char* | |
645f8123 | 164 | section_contents(unsigned int shndx, off_t* plen); |
f6ce93d6 ILT |
165 | |
166 | // Return the name of a section given a section index. This is only | |
167 | // used for error messages. | |
168 | std::string | |
169 | section_name(unsigned int shnum) | |
170 | { return this->do_section_name(shnum); } | |
171 | ||
645f8123 ILT |
172 | // Functions and types for the elfcpp::Elf_file interface. This |
173 | // permit us to use Object as the File template parameter for | |
174 | // elfcpp::Elf_file. | |
175 | ||
176 | // The View class is returned by view. It must support a single | |
177 | // method, data(). This is trivial, because get_view does what we | |
178 | // need. | |
179 | class View | |
180 | { | |
181 | public: | |
182 | View(const unsigned char* p) | |
183 | : p_(p) | |
184 | { } | |
185 | ||
186 | const unsigned char* | |
187 | data() const | |
188 | { return this->p_; } | |
189 | ||
190 | private: | |
191 | const unsigned char* p_; | |
192 | }; | |
193 | ||
194 | // Return a View. | |
195 | View | |
196 | view(off_t file_offset, off_t data_size) | |
197 | { return View(this->get_view(file_offset, data_size)); } | |
198 | ||
199 | // Report an error. | |
200 | void | |
201 | error(const char* format, ...) ATTRIBUTE_PRINTF_2; | |
202 | ||
203 | // A location in the file. | |
204 | struct Location | |
205 | { | |
206 | off_t file_offset; | |
207 | off_t data_size; | |
208 | ||
209 | Location(off_t fo, off_t ds) | |
210 | : file_offset(fo), data_size(ds) | |
211 | { } | |
212 | }; | |
213 | ||
214 | // Get a View given a Location. | |
215 | View view(Location loc) | |
216 | { return View(this->get_view(loc.file_offset, loc.data_size)); } | |
217 | ||
f6ce93d6 ILT |
218 | protected: |
219 | // Read the symbols--implemented by child class. | |
220 | virtual void | |
221 | do_read_symbols(Read_symbols_data*) = 0; | |
222 | ||
223 | // Lay out sections--implemented by child class. | |
224 | virtual void | |
225 | do_layout(const General_options&, Symbol_table*, Layout*, | |
226 | Read_symbols_data*) = 0; | |
227 | ||
228 | // Add symbol information to the global symbol table--implemented by | |
229 | // child class. | |
230 | virtual void | |
231 | do_add_symbols(Symbol_table*, Read_symbols_data*) = 0; | |
232 | ||
645f8123 ILT |
233 | // Return the location of the contents of a section. Implemented by |
234 | // child class. | |
235 | virtual Location | |
236 | do_section_contents(unsigned int shnum) = 0; | |
f6ce93d6 ILT |
237 | |
238 | // Get the name of a section--implemented by child class. | |
239 | virtual std::string | |
240 | do_section_name(unsigned int shnum) = 0; | |
241 | ||
242 | // Get the file. | |
243 | Input_file* | |
244 | input_file() const | |
245 | { return this->input_file_; } | |
246 | ||
247 | // Get the offset into the file. | |
248 | off_t | |
249 | offset() const | |
250 | { return this->offset_; } | |
251 | ||
252 | // Get a view into the underlying file. | |
253 | const unsigned char* | |
254 | get_view(off_t start, off_t size) | |
255 | { return this->input_file_->file().get_view(start + this->offset_, size); } | |
256 | ||
257 | // Get a lasting view into the underlying file. | |
258 | File_view* | |
259 | get_lasting_view(off_t start, off_t size) | |
260 | { | |
261 | return this->input_file_->file().get_lasting_view(start + this->offset_, | |
262 | size); | |
263 | } | |
264 | ||
265 | // Read data from the underlying file. | |
266 | void | |
267 | read(off_t start, off_t size, void* p) | |
268 | { this->input_file_->file().read(start + this->offset_, size, p); } | |
269 | ||
270 | // Set the target. | |
271 | void | |
dbe717ef ILT |
272 | set_target(int machine, int size, bool big_endian, int osabi, |
273 | int abiversion); | |
274 | ||
275 | // Get the number of sections. | |
276 | unsigned int | |
277 | shnum() const | |
278 | { return this->shnum_; } | |
279 | ||
280 | // Set the number of sections. | |
281 | void | |
282 | set_shnum(int shnum) | |
283 | { this->shnum_ = shnum; } | |
284 | ||
285 | // Functions used by both Sized_relobj and Sized_dynobj. | |
286 | ||
287 | // Read the section data into a Read_symbols_data object. | |
288 | template<int size, bool big_endian> | |
289 | void | |
290 | read_section_data(elfcpp::Elf_file<size, big_endian, Object>*, | |
291 | Read_symbols_data*); | |
292 | ||
293 | // If NAME is the name of a special .gnu.warning section, arrange | |
294 | // for the warning to be issued. SHNDX is the section index. | |
295 | // Return whether it is a warning section. | |
296 | bool | |
297 | handle_gnu_warning_section(const char* name, unsigned int shndx, | |
298 | Symbol_table*); | |
f6ce93d6 ILT |
299 | |
300 | private: | |
301 | // This class may not be copied. | |
302 | Object(const Object&); | |
303 | Object& operator=(const Object&); | |
304 | ||
305 | // Name of object as printed to user. | |
306 | std::string name_; | |
307 | // For reading the file. | |
308 | Input_file* input_file_; | |
309 | // Offset within the file--0 for an object file, non-0 for an | |
310 | // archive. | |
311 | off_t offset_; | |
dbe717ef ILT |
312 | // Number of input sections. |
313 | unsigned int shnum_; | |
f6ce93d6 ILT |
314 | // Whether this is a dynamic object. |
315 | bool is_dynamic_; | |
316 | // Target functions--may be NULL if the target is not known. | |
317 | Target* target_; | |
318 | }; | |
319 | ||
320 | // Implement sized_target inline for efficiency. This approach breaks | |
321 | // static type checking, but is made safe using asserts. | |
322 | ||
323 | template<int size, bool big_endian> | |
324 | inline Sized_target<size, big_endian>* | |
325 | Object::sized_target(ACCEPT_SIZE_ENDIAN_ONLY) | |
326 | { | |
327 | assert(this->target_->get_size() == size); | |
328 | assert(this->target_->is_big_endian() ? big_endian : !big_endian); | |
329 | return static_cast<Sized_target<size, big_endian>*>(this->target_); | |
330 | } | |
331 | ||
332 | // A regular object (ET_REL). This is an abstract base class itself. | |
333 | // The implementations is the template class Sized_relobj. | |
334 | ||
335 | class Relobj : public Object | |
336 | { | |
337 | public: | |
338 | Relobj(const std::string& name, Input_file* input_file, off_t offset = 0) | |
339 | : Object(name, input_file, false, offset) | |
340 | { } | |
341 | ||
92e059d8 | 342 | // Read the relocs. |
a2fb1b05 | 343 | void |
92e059d8 ILT |
344 | read_relocs(Read_relocs_data* rd) |
345 | { return this->do_read_relocs(rd); } | |
346 | ||
347 | // Scan the relocs and adjust the symbol table. | |
348 | void | |
349 | scan_relocs(const General_options& options, Symbol_table* symtab, | |
ead1e424 ILT |
350 | Layout* layout, Read_relocs_data* rd) |
351 | { return this->do_scan_relocs(options, symtab, layout, rd); } | |
a2fb1b05 | 352 | |
75f65a3e ILT |
353 | // Initial local symbol processing: set the offset where local |
354 | // symbol information will be stored; add local symbol names to | |
c06b7b0b ILT |
355 | // *POOL; return the new local symbol index. |
356 | unsigned int | |
357 | finalize_local_symbols(unsigned int index, off_t off, Stringpool* pool) | |
358 | { return this->do_finalize_local_symbols(index, off, pool); } | |
75f65a3e | 359 | |
61ba1cf9 ILT |
360 | // Relocate the input sections and write out the local symbols. |
361 | void | |
362 | relocate(const General_options& options, const Symbol_table* symtab, | |
92e059d8 ILT |
363 | const Layout* layout, Output_file* of) |
364 | { return this->do_relocate(options, symtab, layout, of); } | |
61ba1cf9 | 365 | |
a783673b ILT |
366 | // Return whether an input section is being included in the link. |
367 | bool | |
368 | is_section_included(unsigned int shnum) const | |
369 | { | |
370 | assert(shnum < this->map_to_output_.size()); | |
371 | return this->map_to_output_[shnum].output_section != NULL; | |
372 | } | |
373 | ||
374 | // Given a section index, return the corresponding Output_section | |
375 | // (which will be NULL if the section is not included in the link) | |
376 | // and set *POFF to the offset within that section. | |
377 | inline Output_section* | |
378 | output_section(unsigned int shnum, off_t* poff); | |
379 | ||
ead1e424 ILT |
380 | // Set the offset of an input section within its output section. |
381 | void | |
382 | set_section_offset(unsigned int shndx, off_t off) | |
383 | { | |
384 | assert(shndx < this->map_to_output_.size()); | |
385 | this->map_to_output_[shndx].offset = off; | |
386 | } | |
387 | ||
a783673b | 388 | protected: |
a2fb1b05 ILT |
389 | // What we need to know to map an input section to an output |
390 | // section. We keep an array of these, one for each input section, | |
391 | // indexed by the input section number. | |
392 | struct Map_to_output | |
393 | { | |
394 | // The output section. This is NULL if the input section is to be | |
395 | // discarded. | |
396 | Output_section* output_section; | |
397 | // The offset within the output section. | |
398 | off_t offset; | |
399 | }; | |
400 | ||
92e059d8 ILT |
401 | // Read the relocs--implemented by child class. |
402 | virtual void | |
403 | do_read_relocs(Read_relocs_data*) = 0; | |
404 | ||
405 | // Scan the relocs--implemented by child class. | |
406 | virtual void | |
ead1e424 ILT |
407 | do_scan_relocs(const General_options&, Symbol_table*, Layout*, |
408 | Read_relocs_data*) = 0; | |
92e059d8 | 409 | |
75f65a3e | 410 | // Finalize local symbols--implemented by child class. |
c06b7b0b ILT |
411 | virtual unsigned int |
412 | do_finalize_local_symbols(unsigned int, off_t, Stringpool*) = 0; | |
75f65a3e | 413 | |
61ba1cf9 ILT |
414 | // Relocate the input sections and write out the local |
415 | // symbols--implemented by child class. | |
416 | virtual void | |
417 | do_relocate(const General_options& options, const Symbol_table* symtab, | |
92e059d8 ILT |
418 | const Layout*, Output_file* of) = 0; |
419 | ||
a2fb1b05 ILT |
420 | // Return the vector mapping input sections to output sections. |
421 | std::vector<Map_to_output>& | |
422 | map_to_output() | |
423 | { return this->map_to_output_; } | |
424 | ||
bae7f79e | 425 | private: |
a2fb1b05 ILT |
426 | // Mapping from input sections to output section. |
427 | std::vector<Map_to_output> map_to_output_; | |
bae7f79e ILT |
428 | }; |
429 | ||
a783673b ILT |
430 | // Implement Object::output_section inline for efficiency. |
431 | inline Output_section* | |
f6ce93d6 | 432 | Relobj::output_section(unsigned int shnum, off_t* poff) |
a783673b ILT |
433 | { |
434 | assert(shnum < this->map_to_output_.size()); | |
435 | const Map_to_output& mo(this->map_to_output_[shnum]); | |
436 | *poff = mo.offset; | |
437 | return mo.output_section; | |
438 | } | |
439 | ||
14bfc3f5 | 440 | // A regular object file. This is size and endian specific. |
bae7f79e ILT |
441 | |
442 | template<int size, bool big_endian> | |
f6ce93d6 | 443 | class Sized_relobj : public Relobj |
bae7f79e ILT |
444 | { |
445 | public: | |
c06b7b0b ILT |
446 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
447 | typedef std::vector<Address> Local_values; | |
448 | ||
f6ce93d6 | 449 | Sized_relobj(const std::string& name, Input_file* input_file, off_t offset, |
bae7f79e ILT |
450 | const typename elfcpp::Ehdr<size, big_endian>&); |
451 | ||
f6ce93d6 | 452 | ~Sized_relobj(); |
bae7f79e | 453 | |
a2fb1b05 | 454 | // Set up the object file based on the ELF header. |
bae7f79e ILT |
455 | void |
456 | setup(const typename elfcpp::Ehdr<size, big_endian>&); | |
457 | ||
c06b7b0b ILT |
458 | // Return the index of local symbol SYM in the ordinary symbol |
459 | // table. A value of -1U means that the symbol is not being output. | |
460 | unsigned int | |
461 | symtab_index(unsigned int sym) const | |
462 | { | |
463 | assert(sym < this->local_indexes_.size()); | |
464 | assert(this->local_indexes_[sym] != 0); | |
465 | return this->local_indexes_[sym]; | |
466 | } | |
467 | ||
a2fb1b05 | 468 | // Read the symbols. |
bae7f79e | 469 | void |
12e14209 | 470 | do_read_symbols(Read_symbols_data*); |
14bfc3f5 | 471 | |
dbe717ef ILT |
472 | // Lay out the input sections. |
473 | void | |
474 | do_layout(const General_options&, Symbol_table*, Layout*, | |
475 | Read_symbols_data*); | |
476 | ||
12e14209 ILT |
477 | // Add the symbols to the symbol table. |
478 | void | |
479 | do_add_symbols(Symbol_table*, Read_symbols_data*); | |
a2fb1b05 | 480 | |
92e059d8 ILT |
481 | // Read the relocs. |
482 | void | |
483 | do_read_relocs(Read_relocs_data*); | |
484 | ||
485 | // Scan the relocs and adjust the symbol table. | |
486 | void | |
ead1e424 ILT |
487 | do_scan_relocs(const General_options&, Symbol_table*, Layout*, |
488 | Read_relocs_data*); | |
92e059d8 | 489 | |
75f65a3e | 490 | // Finalize the local symbols. |
c06b7b0b ILT |
491 | unsigned int |
492 | do_finalize_local_symbols(unsigned int, off_t, Stringpool*); | |
75f65a3e | 493 | |
61ba1cf9 ILT |
494 | // Relocate the input sections and write out the local symbols. |
495 | void | |
496 | do_relocate(const General_options& options, const Symbol_table* symtab, | |
92e059d8 ILT |
497 | const Layout*, Output_file* of); |
498 | ||
499 | // Get the name of a section. | |
500 | std::string | |
645f8123 ILT |
501 | do_section_name(unsigned int shndx) |
502 | { return this->elf_file_.section_name(shndx); } | |
61ba1cf9 | 503 | |
645f8123 | 504 | // Return the location of the contents of a section. |
dbe717ef | 505 | Object::Location |
645f8123 ILT |
506 | do_section_contents(unsigned int shndx) |
507 | { return this->elf_file_.section_contents(shndx); } | |
f6ce93d6 | 508 | |
a2fb1b05 | 509 | // Return the appropriate Sized_target structure. |
14bfc3f5 ILT |
510 | Sized_target<size, big_endian>* |
511 | sized_target() | |
274e99f9 | 512 | { |
593f47df ILT |
513 | return this->Object::sized_target |
514 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
515 | SELECT_SIZE_ENDIAN_ONLY(size, big_endian)); | |
274e99f9 | 516 | } |
bae7f79e ILT |
517 | |
518 | private: | |
a2fb1b05 | 519 | // For convenience. |
f6ce93d6 | 520 | typedef Sized_relobj<size, big_endian> This; |
a2fb1b05 ILT |
521 | static const int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; |
522 | static const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
523 | static const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
75f65a3e ILT |
524 | typedef elfcpp::Shdr<size, big_endian> Shdr; |
525 | ||
dbe717ef ILT |
526 | // Find the SHT_SYMTAB section, given the section headers. |
527 | void | |
528 | find_symtab(const unsigned char* pshdrs); | |
529 | ||
a2fb1b05 ILT |
530 | // Whether to include a section group in the link. |
531 | bool | |
532 | include_section_group(Layout*, unsigned int, | |
533 | const elfcpp::Shdr<size, big_endian>&, | |
534 | std::vector<bool>*); | |
535 | ||
536 | // Whether to include a linkonce section in the link. | |
537 | bool | |
538 | include_linkonce_section(Layout*, const char*, | |
539 | const elfcpp::Shdr<size, big_endian>&); | |
540 | ||
61ba1cf9 ILT |
541 | // Views and sizes when relocating. |
542 | struct View_size | |
543 | { | |
544 | unsigned char* view; | |
545 | typename elfcpp::Elf_types<size>::Elf_Addr address; | |
546 | off_t offset; | |
547 | off_t view_size; | |
548 | }; | |
549 | ||
550 | typedef std::vector<View_size> Views; | |
551 | ||
552 | // Write section data to the output file. Record the views and | |
553 | // sizes in VIEWS for use when relocating. | |
554 | void | |
555 | write_sections(const unsigned char* pshdrs, Output_file*, Views*); | |
556 | ||
557 | // Relocate the sections in the output file. | |
558 | void | |
92e059d8 ILT |
559 | relocate_sections(const General_options& options, const Symbol_table*, |
560 | const Layout*, const unsigned char* pshdrs, Views*); | |
61ba1cf9 ILT |
561 | |
562 | // Write out the local symbols. | |
563 | void | |
564 | write_local_symbols(Output_file*, const Stringpool*); | |
565 | ||
645f8123 ILT |
566 | // General access to the ELF file. |
567 | elfcpp::Elf_file<size, big_endian, Object> elf_file_; | |
bae7f79e | 568 | // Index of SHT_SYMTAB section. |
645f8123 | 569 | unsigned int symtab_shndx_; |
61ba1cf9 ILT |
570 | // The number of local symbols. |
571 | unsigned int local_symbol_count_; | |
572 | // The number of local symbols which go into the output file. | |
573 | unsigned int output_local_symbol_count_; | |
14bfc3f5 ILT |
574 | // The entries in the symbol table for the external symbols. |
575 | Symbol** symbols_; | |
75f65a3e ILT |
576 | // File offset for local symbols. |
577 | off_t local_symbol_offset_; | |
61ba1cf9 | 578 | // Values of local symbols. |
c06b7b0b ILT |
579 | Local_values local_values_; |
580 | // Indexes of local symbols in the output file; -1U if not present. | |
581 | std::vector<unsigned int> local_indexes_; | |
bae7f79e ILT |
582 | }; |
583 | ||
54dc6425 | 584 | // A class to manage the list of all objects. |
a2fb1b05 | 585 | |
54dc6425 ILT |
586 | class Input_objects |
587 | { | |
588 | public: | |
589 | Input_objects() | |
f6ce93d6 | 590 | : relobj_list_(), target_(NULL) |
54dc6425 ILT |
591 | { } |
592 | ||
f6ce93d6 ILT |
593 | // The type of the list of input relocateable objects. |
594 | typedef std::vector<Relobj*> Relobj_list; | |
595 | typedef Relobj_list::const_iterator Relobj_iterator; | |
596 | ||
597 | // The type of the list of input dynamic objects. | |
598 | typedef std::vector<Dynobj*> Dynobj_list; | |
599 | typedef Dynobj_list::const_iterator Dynobj_iterator; | |
54dc6425 ILT |
600 | |
601 | // Add an object to the list. | |
602 | void | |
603 | add_object(Object*); | |
604 | ||
75f65a3e ILT |
605 | // Get the target we should use for the output file. |
606 | Target* | |
607 | target() const | |
608 | { return this->target_; } | |
609 | ||
f6ce93d6 ILT |
610 | // Iterate over all regular objects. |
611 | ||
612 | Relobj_iterator | |
613 | relobj_begin() const | |
614 | { return this->relobj_list_.begin(); } | |
615 | ||
616 | Relobj_iterator | |
617 | relobj_end() const | |
618 | { return this->relobj_list_.end(); } | |
619 | ||
620 | // Iterate over all dynamic objects. | |
621 | ||
622 | Dynobj_iterator | |
623 | dynobj_begin() const | |
624 | { return this->dynobj_list_.begin(); } | |
54dc6425 | 625 | |
f6ce93d6 ILT |
626 | Dynobj_iterator |
627 | dynobj_end() const | |
628 | { return this->dynobj_list_.end(); } | |
54dc6425 ILT |
629 | |
630 | // Return whether we have seen any dynamic objects. | |
631 | bool | |
632 | any_dynamic() const | |
f6ce93d6 | 633 | { return !this->dynobj_list_.empty(); } |
54dc6425 ILT |
634 | |
635 | private: | |
636 | Input_objects(const Input_objects&); | |
637 | Input_objects& operator=(const Input_objects&); | |
638 | ||
f6ce93d6 ILT |
639 | Relobj_list relobj_list_; |
640 | Dynobj_list dynobj_list_; | |
75f65a3e | 641 | Target* target_; |
54dc6425 | 642 | }; |
a2fb1b05 | 643 | |
92e059d8 ILT |
644 | // Some of the information we pass to the relocation routines. We |
645 | // group this together to avoid passing a dozen different arguments. | |
646 | ||
647 | template<int size, bool big_endian> | |
648 | struct Relocate_info | |
649 | { | |
650 | // Command line options. | |
651 | const General_options* options; | |
652 | // Symbol table. | |
653 | const Symbol_table* symtab; | |
654 | // Layout. | |
655 | const Layout* layout; | |
656 | // Object being relocated. | |
f6ce93d6 | 657 | Sized_relobj<size, big_endian>* object; |
92e059d8 ILT |
658 | // Number of local symbols. |
659 | unsigned int local_symbol_count; | |
660 | // Values of local symbols. | |
c06b7b0b | 661 | const typename Sized_relobj<size, big_endian>::Local_values* local_values; |
92e059d8 | 662 | // Global symbols. |
c06b7b0b | 663 | const Symbol* const * symbols; |
92e059d8 ILT |
664 | // Section index of relocation section. |
665 | unsigned int reloc_shndx; | |
666 | // Section index of section being relocated. | |
667 | unsigned int data_shndx; | |
668 | ||
669 | // Return a string showing the location of a relocation. This is | |
670 | // only used for error messages. | |
671 | std::string | |
672 | location(size_t relnum, off_t reloffset) const; | |
673 | }; | |
674 | ||
bae7f79e ILT |
675 | // Return an Object appropriate for the input file. P is BYTES long, |
676 | // and holds the ELF header. | |
677 | ||
61ba1cf9 ILT |
678 | extern Object* |
679 | make_elf_object(const std::string& name, Input_file*, | |
680 | off_t offset, const unsigned char* p, | |
681 | off_t bytes); | |
bae7f79e ILT |
682 | |
683 | } // end namespace gold | |
684 | ||
685 | #endif // !defined(GOLD_OBJECT_H) |