Commit | Line | Data |
---|---|---|
61ba1cf9 ILT |
1 | // reloc.cc -- relocate input files for gold. |
2 | ||
6cb15b7f ILT |
3 | // Copyright 2006, 2007 Free Software Foundation, Inc. |
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 | ||
61ba1cf9 ILT |
23 | #include "gold.h" |
24 | ||
25 | #include "workqueue.h" | |
26 | #include "object.h" | |
5a6f7e2d | 27 | #include "symtab.h" |
61ba1cf9 ILT |
28 | #include "output.h" |
29 | #include "reloc.h" | |
30 | ||
31 | namespace gold | |
32 | { | |
33 | ||
92e059d8 ILT |
34 | // Read_relocs methods. |
35 | ||
36 | // These tasks just read the relocation information from the file. | |
37 | // After reading it, the start another task to process the | |
38 | // information. These tasks requires access to the file. | |
39 | ||
40 | Task::Is_runnable_type | |
41 | Read_relocs::is_runnable(Workqueue*) | |
42 | { | |
43 | return this->object_->is_locked() ? IS_LOCKED : IS_RUNNABLE; | |
44 | } | |
45 | ||
46 | // Lock the file. | |
47 | ||
48 | Task_locker* | |
49 | Read_relocs::locks(Workqueue*) | |
50 | { | |
51 | return new Task_locker_obj<Object>(*this->object_); | |
52 | } | |
53 | ||
54 | // Read the relocations and then start a Scan_relocs_task. | |
55 | ||
56 | void | |
57 | Read_relocs::run(Workqueue* workqueue) | |
58 | { | |
59 | Read_relocs_data *rd = new Read_relocs_data; | |
60 | this->object_->read_relocs(rd); | |
61 | workqueue->queue_front(new Scan_relocs(this->options_, this->symtab_, | |
ead1e424 ILT |
62 | this->layout_, this->object_, rd, |
63 | this->symtab_lock_, this->blocker_)); | |
92e059d8 ILT |
64 | } |
65 | ||
66 | // Scan_relocs methods. | |
67 | ||
68 | // These tasks scan the relocations read by Read_relocs and mark up | |
69 | // the symbol table to indicate which relocations are required. We | |
70 | // use a lock on the symbol table to keep them from interfering with | |
71 | // each other. | |
72 | ||
73 | Task::Is_runnable_type | |
74 | Scan_relocs::is_runnable(Workqueue*) | |
75 | { | |
ead1e424 ILT |
76 | if (!this->symtab_lock_->is_writable() || this->object_->is_locked()) |
77 | return IS_LOCKED; | |
78 | return IS_RUNNABLE; | |
92e059d8 ILT |
79 | } |
80 | ||
81 | // Return the locks we hold: one on the file, one on the symbol table | |
82 | // and one blocker. | |
83 | ||
84 | class Scan_relocs::Scan_relocs_locker : public Task_locker | |
85 | { | |
86 | public: | |
87 | Scan_relocs_locker(Object* object, Task_token& symtab_lock, Task* task, | |
88 | Task_token& blocker, Workqueue* workqueue) | |
89 | : objlock_(*object), symtab_locker_(symtab_lock, task), | |
90 | blocker_(blocker, workqueue) | |
91 | { } | |
92 | ||
93 | private: | |
94 | Task_locker_obj<Object> objlock_; | |
95 | Task_locker_write symtab_locker_; | |
96 | Task_locker_block blocker_; | |
97 | }; | |
98 | ||
99 | Task_locker* | |
100 | Scan_relocs::locks(Workqueue* workqueue) | |
101 | { | |
102 | return new Scan_relocs_locker(this->object_, *this->symtab_lock_, this, | |
103 | *this->blocker_, workqueue); | |
104 | } | |
105 | ||
106 | // Scan the relocs. | |
107 | ||
108 | void | |
109 | Scan_relocs::run(Workqueue*) | |
110 | { | |
ead1e424 ILT |
111 | this->object_->scan_relocs(this->options_, this->symtab_, this->layout_, |
112 | this->rd_); | |
92e059d8 ILT |
113 | delete this->rd_; |
114 | this->rd_ = NULL; | |
115 | } | |
116 | ||
61ba1cf9 ILT |
117 | // Relocate_task methods. |
118 | ||
119 | // These tasks are always runnable. | |
120 | ||
121 | Task::Is_runnable_type | |
122 | Relocate_task::is_runnable(Workqueue*) | |
123 | { | |
124 | return IS_RUNNABLE; | |
125 | } | |
126 | ||
127 | // We want to lock the file while we run. We want to unblock | |
128 | // FINAL_BLOCKER when we are done. | |
129 | ||
130 | class Relocate_task::Relocate_locker : public Task_locker | |
131 | { | |
132 | public: | |
133 | Relocate_locker(Task_token& token, Workqueue* workqueue, | |
134 | Object* object) | |
135 | : blocker_(token, workqueue), objlock_(*object) | |
136 | { } | |
137 | ||
138 | private: | |
139 | Task_locker_block blocker_; | |
140 | Task_locker_obj<Object> objlock_; | |
141 | }; | |
142 | ||
143 | Task_locker* | |
144 | Relocate_task::locks(Workqueue* workqueue) | |
145 | { | |
146 | return new Relocate_locker(*this->final_blocker_, workqueue, | |
147 | this->object_); | |
148 | } | |
149 | ||
150 | // Run the task. | |
151 | ||
152 | void | |
153 | Relocate_task::run(Workqueue*) | |
154 | { | |
92e059d8 | 155 | this->object_->relocate(this->options_, this->symtab_, this->layout_, |
61ba1cf9 ILT |
156 | this->of_); |
157 | } | |
158 | ||
92e059d8 ILT |
159 | // Read the relocs and local symbols from the object file and store |
160 | // the information in RD. | |
161 | ||
162 | template<int size, bool big_endian> | |
163 | void | |
f6ce93d6 | 164 | Sized_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) |
92e059d8 ILT |
165 | { |
166 | rd->relocs.clear(); | |
167 | ||
168 | unsigned int shnum = this->shnum(); | |
169 | if (shnum == 0) | |
170 | return; | |
171 | ||
172 | rd->relocs.reserve(shnum / 2); | |
173 | ||
645f8123 | 174 | const unsigned char *pshdrs = this->get_view(this->elf_file_.shoff(), |
9eb9fa57 ILT |
175 | shnum * This::shdr_size, |
176 | true); | |
92e059d8 ILT |
177 | // Skip the first, dummy, section. |
178 | const unsigned char *ps = pshdrs + This::shdr_size; | |
179 | for (unsigned int i = 1; i < shnum; ++i, ps += This::shdr_size) | |
180 | { | |
181 | typename This::Shdr shdr(ps); | |
182 | ||
183 | unsigned int sh_type = shdr.get_sh_type(); | |
184 | if (sh_type != elfcpp::SHT_REL && sh_type != elfcpp::SHT_RELA) | |
185 | continue; | |
186 | ||
187 | unsigned int shndx = shdr.get_sh_info(); | |
188 | if (shndx >= shnum) | |
189 | { | |
190 | fprintf(stderr, _("%s: %s: relocation section %u has bad info %u\n"), | |
191 | program_name, this->name().c_str(), i, shndx); | |
192 | gold_exit(false); | |
193 | } | |
194 | ||
195 | if (!this->is_section_included(shndx)) | |
196 | continue; | |
197 | ||
ead1e424 ILT |
198 | // We are scanning relocations in order to fill out the GOT and |
199 | // PLT sections. Relocations for sections which are not | |
200 | // allocated (typically debugging sections) should not add new | |
201 | // GOT and PLT entries. So we skip them. | |
202 | typename This::Shdr secshdr(pshdrs + shndx * This::shdr_size); | |
203 | if ((secshdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0) | |
204 | continue; | |
205 | ||
645f8123 | 206 | if (shdr.get_sh_link() != this->symtab_shndx_) |
92e059d8 ILT |
207 | { |
208 | fprintf(stderr, | |
209 | _("%s: %s: relocation section %u uses unexpected " | |
210 | "symbol table %u\n"), | |
211 | program_name, this->name().c_str(), i, shdr.get_sh_link()); | |
212 | gold_exit(false); | |
213 | } | |
214 | ||
215 | off_t sh_size = shdr.get_sh_size(); | |
216 | ||
217 | unsigned int reloc_size; | |
218 | if (sh_type == elfcpp::SHT_REL) | |
219 | reloc_size = elfcpp::Elf_sizes<size>::rel_size; | |
220 | else | |
221 | reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
222 | if (reloc_size != shdr.get_sh_entsize()) | |
223 | { | |
224 | fprintf(stderr, | |
225 | _("%s: %s: unexpected entsize for reloc section %u: " | |
226 | "%lu != %u"), | |
227 | program_name, this->name().c_str(), i, | |
228 | static_cast<unsigned long>(shdr.get_sh_entsize()), | |
229 | reloc_size); | |
230 | gold_exit(false); | |
231 | } | |
232 | ||
233 | size_t reloc_count = sh_size / reloc_size; | |
234 | if (reloc_count * reloc_size != sh_size) | |
235 | { | |
236 | fprintf(stderr, _("%s: %s: reloc section %u size %lu uneven"), | |
237 | program_name, this->name().c_str(), i, | |
238 | static_cast<unsigned long>(sh_size)); | |
239 | gold_exit(false); | |
240 | } | |
241 | ||
242 | rd->relocs.push_back(Section_relocs()); | |
243 | Section_relocs& sr(rd->relocs.back()); | |
244 | sr.reloc_shndx = i; | |
245 | sr.data_shndx = shndx; | |
9eb9fa57 ILT |
246 | sr.contents = this->get_lasting_view(shdr.get_sh_offset(), sh_size, |
247 | true); | |
92e059d8 ILT |
248 | sr.sh_type = sh_type; |
249 | sr.reloc_count = reloc_count; | |
250 | } | |
251 | ||
252 | // Read the local symbols. | |
a3ad94ed | 253 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 254 | if (this->symtab_shndx_ == 0 || this->local_symbol_count_ == 0) |
92e059d8 ILT |
255 | rd->local_symbols = NULL; |
256 | else | |
257 | { | |
258 | typename This::Shdr symtabshdr(pshdrs | |
645f8123 | 259 | + this->symtab_shndx_ * This::shdr_size); |
a3ad94ed | 260 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
92e059d8 ILT |
261 | const int sym_size = This::sym_size; |
262 | const unsigned int loccount = this->local_symbol_count_; | |
a3ad94ed | 263 | gold_assert(loccount == symtabshdr.get_sh_info()); |
92e059d8 ILT |
264 | off_t locsize = loccount * sym_size; |
265 | rd->local_symbols = this->get_lasting_view(symtabshdr.get_sh_offset(), | |
9eb9fa57 | 266 | locsize, true); |
92e059d8 ILT |
267 | } |
268 | } | |
269 | ||
270 | // Scan the relocs and adjust the symbol table. This looks for | |
271 | // relocations which require GOT/PLT/COPY relocations. | |
272 | ||
273 | template<int size, bool big_endian> | |
274 | void | |
f6ce93d6 | 275 | Sized_relobj<size, big_endian>::do_scan_relocs(const General_options& options, |
92e059d8 | 276 | Symbol_table* symtab, |
ead1e424 | 277 | Layout* layout, |
92e059d8 ILT |
278 | Read_relocs_data* rd) |
279 | { | |
280 | Sized_target<size, big_endian>* target = this->sized_target(); | |
281 | ||
282 | const unsigned char* local_symbols; | |
283 | if (rd->local_symbols == NULL) | |
284 | local_symbols = NULL; | |
285 | else | |
286 | local_symbols = rd->local_symbols->data(); | |
287 | ||
288 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); | |
289 | p != rd->relocs.end(); | |
290 | ++p) | |
291 | { | |
a3ad94ed ILT |
292 | target->scan_relocs(options, symtab, layout, this, p->data_shndx, |
293 | p->sh_type, p->contents->data(), p->reloc_count, | |
92e059d8 ILT |
294 | this->local_symbol_count_, |
295 | local_symbols, | |
296 | this->symbols_); | |
297 | delete p->contents; | |
298 | p->contents = NULL; | |
299 | } | |
300 | ||
301 | if (rd->local_symbols != NULL) | |
302 | { | |
303 | delete rd->local_symbols; | |
304 | rd->local_symbols = NULL; | |
305 | } | |
306 | } | |
307 | ||
61ba1cf9 ILT |
308 | // Relocate the input sections and write out the local symbols. |
309 | ||
310 | template<int size, bool big_endian> | |
311 | void | |
f6ce93d6 | 312 | Sized_relobj<size, big_endian>::do_relocate(const General_options& options, |
61ba1cf9 | 313 | const Symbol_table* symtab, |
92e059d8 | 314 | const Layout* layout, |
61ba1cf9 ILT |
315 | Output_file* of) |
316 | { | |
317 | unsigned int shnum = this->shnum(); | |
318 | ||
319 | // Read the section headers. | |
645f8123 | 320 | const unsigned char* pshdrs = this->get_view(this->elf_file_.shoff(), |
9eb9fa57 ILT |
321 | shnum * This::shdr_size, |
322 | true); | |
61ba1cf9 ILT |
323 | |
324 | Views views; | |
325 | views.resize(shnum); | |
326 | ||
327 | // Make two passes over the sections. The first one copies the | |
328 | // section data to the output file. The second one applies | |
329 | // relocations. | |
330 | ||
331 | this->write_sections(pshdrs, of, &views); | |
332 | ||
333 | // Apply relocations. | |
334 | ||
92e059d8 | 335 | this->relocate_sections(options, symtab, layout, pshdrs, &views); |
61ba1cf9 ILT |
336 | |
337 | // Write out the accumulated views. | |
338 | for (unsigned int i = 1; i < shnum; ++i) | |
339 | { | |
340 | if (views[i].view != NULL) | |
341 | of->write_output_view(views[i].offset, views[i].view_size, | |
342 | views[i].view); | |
343 | } | |
344 | ||
345 | // Write out the local symbols. | |
92e059d8 | 346 | this->write_local_symbols(of, layout->sympool()); |
61ba1cf9 ILT |
347 | } |
348 | ||
349 | // Write section data to the output file. PSHDRS points to the | |
350 | // section headers. Record the views in *PVIEWS for use when | |
351 | // relocating. | |
352 | ||
353 | template<int size, bool big_endian> | |
354 | void | |
f6ce93d6 | 355 | Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs, |
61ba1cf9 ILT |
356 | Output_file* of, |
357 | Views* pviews) | |
358 | { | |
359 | unsigned int shnum = this->shnum(); | |
360 | std::vector<Map_to_output>& map_sections(this->map_to_output()); | |
361 | ||
362 | const unsigned char* p = pshdrs + This::shdr_size; | |
363 | for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size) | |
364 | { | |
365 | View_size* pvs = &(*pviews)[i]; | |
366 | ||
367 | pvs->view = NULL; | |
368 | ||
b8e6aad9 ILT |
369 | if (map_sections[i].offset == -1) |
370 | continue; | |
371 | ||
61ba1cf9 ILT |
372 | const Output_section* os = map_sections[i].output_section; |
373 | if (os == NULL) | |
374 | continue; | |
375 | ||
376 | typename This::Shdr shdr(p); | |
377 | ||
378 | if (shdr.get_sh_type() == elfcpp::SHT_NOBITS) | |
379 | continue; | |
380 | ||
61ba1cf9 ILT |
381 | off_t start = os->offset() + map_sections[i].offset; |
382 | off_t sh_size = shdr.get_sh_size(); | |
383 | ||
ead1e424 ILT |
384 | if (sh_size == 0) |
385 | continue; | |
386 | ||
a3ad94ed ILT |
387 | gold_assert(map_sections[i].offset >= 0 |
388 | && map_sections[i].offset + sh_size <= os->data_size()); | |
ead1e424 | 389 | |
61ba1cf9 | 390 | unsigned char* view = of->get_output_view(start, sh_size); |
92e059d8 ILT |
391 | this->read(shdr.get_sh_offset(), sh_size, view); |
392 | ||
61ba1cf9 ILT |
393 | pvs->view = view; |
394 | pvs->address = os->address() + map_sections[i].offset; | |
395 | pvs->offset = start; | |
396 | pvs->view_size = sh_size; | |
397 | } | |
398 | } | |
399 | ||
400 | // Relocate section data. VIEWS points to the section data as views | |
401 | // in the output file. | |
402 | ||
403 | template<int size, bool big_endian> | |
404 | void | |
f6ce93d6 | 405 | Sized_relobj<size, big_endian>::relocate_sections( |
92e059d8 ILT |
406 | const General_options& options, |
407 | const Symbol_table* symtab, | |
408 | const Layout* layout, | |
409 | const unsigned char* pshdrs, | |
410 | Views* pviews) | |
61ba1cf9 ILT |
411 | { |
412 | unsigned int shnum = this->shnum(); | |
61ba1cf9 ILT |
413 | Sized_target<size, big_endian>* target = this->sized_target(); |
414 | ||
92e059d8 ILT |
415 | Relocate_info<size, big_endian> relinfo; |
416 | relinfo.options = &options; | |
417 | relinfo.symtab = symtab; | |
418 | relinfo.layout = layout; | |
419 | relinfo.object = this; | |
420 | relinfo.local_symbol_count = this->local_symbol_count_; | |
c06b7b0b | 421 | relinfo.local_values = &this->local_values_; |
92e059d8 ILT |
422 | relinfo.symbols = this->symbols_; |
423 | ||
61ba1cf9 ILT |
424 | const unsigned char* p = pshdrs + This::shdr_size; |
425 | for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size) | |
426 | { | |
427 | typename This::Shdr shdr(p); | |
428 | ||
429 | unsigned int sh_type = shdr.get_sh_type(); | |
430 | if (sh_type != elfcpp::SHT_REL && sh_type != elfcpp::SHT_RELA) | |
431 | continue; | |
432 | ||
433 | unsigned int index = shdr.get_sh_info(); | |
434 | if (index >= this->shnum()) | |
435 | { | |
436 | fprintf(stderr, _("%s: %s: relocation section %u has bad info %u\n"), | |
437 | program_name, this->name().c_str(), i, index); | |
438 | gold_exit(false); | |
439 | } | |
440 | ||
92e059d8 | 441 | if (!this->is_section_included(index)) |
61ba1cf9 ILT |
442 | { |
443 | // This relocation section is against a section which we | |
444 | // discarded. | |
445 | continue; | |
446 | } | |
447 | ||
a3ad94ed | 448 | gold_assert((*pviews)[index].view != NULL); |
61ba1cf9 | 449 | |
645f8123 | 450 | if (shdr.get_sh_link() != this->symtab_shndx_) |
61ba1cf9 ILT |
451 | { |
452 | fprintf(stderr, | |
453 | _("%s: %s: relocation section %u uses unexpected " | |
454 | "symbol table %u\n"), | |
455 | program_name, this->name().c_str(), i, shdr.get_sh_link()); | |
456 | gold_exit(false); | |
457 | } | |
458 | ||
459 | off_t sh_size = shdr.get_sh_size(); | |
460 | const unsigned char* prelocs = this->get_view(shdr.get_sh_offset(), | |
9eb9fa57 | 461 | sh_size, false); |
61ba1cf9 ILT |
462 | |
463 | unsigned int reloc_size; | |
464 | if (sh_type == elfcpp::SHT_REL) | |
465 | reloc_size = elfcpp::Elf_sizes<size>::rel_size; | |
466 | else | |
467 | reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
468 | ||
469 | if (reloc_size != shdr.get_sh_entsize()) | |
470 | { | |
471 | fprintf(stderr, | |
472 | _("%s: %s: unexpected entsize for reloc section %u: " | |
473 | "%lu != %u"), | |
474 | program_name, this->name().c_str(), i, | |
475 | static_cast<unsigned long>(shdr.get_sh_entsize()), | |
476 | reloc_size); | |
477 | gold_exit(false); | |
478 | } | |
479 | ||
480 | size_t reloc_count = sh_size / reloc_size; | |
481 | if (reloc_count * reloc_size != sh_size) | |
482 | { | |
483 | fprintf(stderr, _("%s: %s: reloc section %u size %lu uneven"), | |
484 | program_name, this->name().c_str(), i, | |
485 | static_cast<unsigned long>(sh_size)); | |
486 | gold_exit(false); | |
487 | } | |
488 | ||
92e059d8 ILT |
489 | relinfo.reloc_shndx = i; |
490 | relinfo.data_shndx = index; | |
491 | target->relocate_section(&relinfo, | |
492 | sh_type, | |
493 | prelocs, | |
494 | reloc_count, | |
61ba1cf9 ILT |
495 | (*pviews)[index].view, |
496 | (*pviews)[index].address, | |
497 | (*pviews)[index].view_size); | |
498 | } | |
499 | } | |
500 | ||
5a6f7e2d ILT |
501 | // Copy_relocs::Copy_reloc_entry methods. |
502 | ||
503 | // Return whether we should emit this reloc. We should emit it if the | |
504 | // symbol is still defined in a dynamic object. If we should not emit | |
505 | // it, we clear it, to save ourselves the test next time. | |
506 | ||
507 | template<int size, bool big_endian> | |
508 | bool | |
509 | Copy_relocs<size, big_endian>::Copy_reloc_entry::should_emit() | |
510 | { | |
511 | if (this->sym_ == NULL) | |
512 | return false; | |
14b31740 | 513 | if (this->sym_->is_from_dynobj()) |
5a6f7e2d ILT |
514 | return true; |
515 | this->sym_ = NULL; | |
516 | return false; | |
517 | } | |
518 | ||
519 | // Emit a reloc into a SHT_REL section. | |
520 | ||
521 | template<int size, bool big_endian> | |
522 | void | |
523 | Copy_relocs<size, big_endian>::Copy_reloc_entry::emit( | |
524 | Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>* reloc_data) | |
525 | { | |
16649710 | 526 | this->sym_->set_needs_dynsym_entry(); |
5a6f7e2d ILT |
527 | reloc_data->add_global(this->sym_, this->reloc_type_, this->relobj_, |
528 | this->shndx_, this->address_); | |
529 | } | |
530 | ||
531 | // Emit a reloc into a SHT_RELA section. | |
532 | ||
533 | template<int size, bool big_endian> | |
534 | void | |
535 | Copy_relocs<size, big_endian>::Copy_reloc_entry::emit( | |
536 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>* reloc_data) | |
537 | { | |
16649710 | 538 | this->sym_->set_needs_dynsym_entry(); |
5a6f7e2d ILT |
539 | reloc_data->add_global(this->sym_, this->reloc_type_, this->relobj_, |
540 | this->shndx_, this->address_, this->addend_); | |
541 | } | |
542 | ||
543 | // Copy_relocs methods. | |
a3ad94ed ILT |
544 | |
545 | // Return whether we need a COPY reloc for a relocation against GSYM. | |
546 | // The relocation is being applied to section SHNDX in OBJECT. | |
547 | ||
548 | template<int size, bool big_endian> | |
549 | bool | |
5a6f7e2d | 550 | Copy_relocs<size, big_endian>::need_copy_reloc( |
a3ad94ed ILT |
551 | const General_options*, |
552 | Relobj* object, | |
553 | unsigned int shndx, | |
5a6f7e2d | 554 | Sized_symbol<size>* sym) |
a3ad94ed ILT |
555 | { |
556 | // FIXME: Handle -z nocopyrelocs. | |
557 | ||
5a6f7e2d ILT |
558 | if (sym->symsize() == 0) |
559 | return false; | |
560 | ||
a3ad94ed ILT |
561 | // If this is a readonly section, then we need a COPY reloc. |
562 | // Otherwise we can use a dynamic reloc. | |
563 | if ((object->section_flags(shndx) & elfcpp::SHF_WRITE) == 0) | |
564 | return true; | |
565 | ||
566 | return false; | |
567 | } | |
568 | ||
5a6f7e2d ILT |
569 | // Save a Rel reloc. |
570 | ||
571 | template<int size, bool big_endian> | |
572 | void | |
573 | Copy_relocs<size, big_endian>::save( | |
574 | Symbol* sym, | |
575 | Relobj* relobj, | |
576 | unsigned int shndx, | |
577 | const elfcpp::Rel<size, big_endian>& rel) | |
578 | { | |
579 | unsigned int reloc_type = elfcpp::elf_r_type<size>(rel.get_r_info()); | |
580 | this->entries_.push_back(Copy_reloc_entry(sym, reloc_type, relobj, shndx, | |
581 | rel.get_r_offset(), 0)); | |
582 | } | |
583 | ||
584 | // Save a Rela reloc. | |
585 | ||
586 | template<int size, bool big_endian> | |
587 | void | |
588 | Copy_relocs<size, big_endian>::save( | |
589 | Symbol* sym, | |
590 | Relobj* relobj, | |
591 | unsigned int shndx, | |
592 | const elfcpp::Rela<size, big_endian>& rela) | |
593 | { | |
594 | unsigned int reloc_type = elfcpp::elf_r_type<size>(rela.get_r_info()); | |
595 | this->entries_.push_back(Copy_reloc_entry(sym, reloc_type, relobj, shndx, | |
596 | rela.get_r_offset(), | |
597 | rela.get_r_addend())); | |
598 | } | |
599 | ||
600 | // Return whether there are any relocs to emit. We don't want to emit | |
601 | // a reloc if the symbol is no longer defined in a dynamic object. | |
602 | ||
603 | template<int size, bool big_endian> | |
604 | bool | |
605 | Copy_relocs<size, big_endian>::any_to_emit() | |
606 | { | |
607 | for (typename Copy_reloc_entries::iterator p = this->entries_.begin(); | |
608 | p != this->entries_.end(); | |
609 | ++p) | |
610 | { | |
611 | if (p->should_emit()) | |
612 | return true; | |
613 | } | |
614 | return false; | |
615 | } | |
616 | ||
617 | // Emit relocs. | |
618 | ||
619 | template<int size, bool big_endian> | |
620 | template<int sh_type> | |
621 | void | |
622 | Copy_relocs<size, big_endian>::emit( | |
623 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_data) | |
624 | { | |
625 | for (typename Copy_reloc_entries::iterator p = this->entries_.begin(); | |
626 | p != this->entries_.end(); | |
627 | ++p) | |
628 | { | |
629 | if (p->should_emit()) | |
630 | p->emit(reloc_data); | |
631 | } | |
632 | } | |
633 | ||
61ba1cf9 ILT |
634 | // Instantiate the templates we need. We could use the configure |
635 | // script to restrict this to only the ones for implemented targets. | |
636 | ||
193a53d9 | 637 | #ifdef HAVE_TARGET_32_LITTLE |
92e059d8 ILT |
638 | template |
639 | void | |
f6ce93d6 | 640 | Sized_relobj<32, false>::do_read_relocs(Read_relocs_data* rd); |
193a53d9 | 641 | #endif |
92e059d8 | 642 | |
193a53d9 | 643 | #ifdef HAVE_TARGET_32_BIG |
92e059d8 ILT |
644 | template |
645 | void | |
f6ce93d6 | 646 | Sized_relobj<32, true>::do_read_relocs(Read_relocs_data* rd); |
193a53d9 | 647 | #endif |
92e059d8 | 648 | |
193a53d9 | 649 | #ifdef HAVE_TARGET_64_LITTLE |
92e059d8 ILT |
650 | template |
651 | void | |
f6ce93d6 | 652 | Sized_relobj<64, false>::do_read_relocs(Read_relocs_data* rd); |
193a53d9 | 653 | #endif |
92e059d8 | 654 | |
193a53d9 | 655 | #ifdef HAVE_TARGET_64_BIG |
92e059d8 ILT |
656 | template |
657 | void | |
f6ce93d6 | 658 | Sized_relobj<64, true>::do_read_relocs(Read_relocs_data* rd); |
193a53d9 | 659 | #endif |
92e059d8 | 660 | |
193a53d9 | 661 | #ifdef HAVE_TARGET_32_LITTLE |
92e059d8 ILT |
662 | template |
663 | void | |
f6ce93d6 | 664 | Sized_relobj<32, false>::do_scan_relocs(const General_options& options, |
92e059d8 | 665 | Symbol_table* symtab, |
ead1e424 | 666 | Layout* layout, |
92e059d8 | 667 | Read_relocs_data* rd); |
193a53d9 | 668 | #endif |
92e059d8 | 669 | |
193a53d9 | 670 | #ifdef HAVE_TARGET_32_BIG |
92e059d8 ILT |
671 | template |
672 | void | |
f6ce93d6 | 673 | Sized_relobj<32, true>::do_scan_relocs(const General_options& options, |
92e059d8 | 674 | Symbol_table* symtab, |
ead1e424 | 675 | Layout* layout, |
92e059d8 | 676 | Read_relocs_data* rd); |
193a53d9 | 677 | #endif |
92e059d8 | 678 | |
193a53d9 | 679 | #ifdef HAVE_TARGET_64_LITTLE |
92e059d8 ILT |
680 | template |
681 | void | |
f6ce93d6 | 682 | Sized_relobj<64, false>::do_scan_relocs(const General_options& options, |
92e059d8 | 683 | Symbol_table* symtab, |
ead1e424 | 684 | Layout* layout, |
92e059d8 | 685 | Read_relocs_data* rd); |
193a53d9 | 686 | #endif |
92e059d8 | 687 | |
193a53d9 | 688 | #ifdef HAVE_TARGET_64_BIG |
92e059d8 ILT |
689 | template |
690 | void | |
f6ce93d6 | 691 | Sized_relobj<64, true>::do_scan_relocs(const General_options& options, |
92e059d8 | 692 | Symbol_table* symtab, |
ead1e424 | 693 | Layout* layout, |
92e059d8 | 694 | Read_relocs_data* rd); |
193a53d9 | 695 | #endif |
92e059d8 | 696 | |
193a53d9 | 697 | #ifdef HAVE_TARGET_32_LITTLE |
61ba1cf9 ILT |
698 | template |
699 | void | |
f6ce93d6 | 700 | Sized_relobj<32, false>::do_relocate(const General_options& options, |
61ba1cf9 | 701 | const Symbol_table* symtab, |
92e059d8 | 702 | const Layout* layout, |
61ba1cf9 | 703 | Output_file* of); |
193a53d9 | 704 | #endif |
61ba1cf9 | 705 | |
193a53d9 | 706 | #ifdef HAVE_TARGET_32_BIG |
61ba1cf9 ILT |
707 | template |
708 | void | |
f6ce93d6 | 709 | Sized_relobj<32, true>::do_relocate(const General_options& options, |
61ba1cf9 | 710 | const Symbol_table* symtab, |
92e059d8 | 711 | const Layout* layout, |
61ba1cf9 | 712 | Output_file* of); |
193a53d9 | 713 | #endif |
61ba1cf9 | 714 | |
193a53d9 | 715 | #ifdef HAVE_TARGET_64_LITTLE |
61ba1cf9 ILT |
716 | template |
717 | void | |
f6ce93d6 | 718 | Sized_relobj<64, false>::do_relocate(const General_options& options, |
61ba1cf9 | 719 | const Symbol_table* symtab, |
92e059d8 | 720 | const Layout* layout, |
61ba1cf9 | 721 | Output_file* of); |
193a53d9 | 722 | #endif |
61ba1cf9 | 723 | |
193a53d9 | 724 | #ifdef HAVE_TARGET_64_BIG |
61ba1cf9 ILT |
725 | template |
726 | void | |
f6ce93d6 | 727 | Sized_relobj<64, true>::do_relocate(const General_options& options, |
61ba1cf9 | 728 | const Symbol_table* symtab, |
92e059d8 | 729 | const Layout* layout, |
61ba1cf9 | 730 | Output_file* of); |
193a53d9 | 731 | #endif |
61ba1cf9 | 732 | |
193a53d9 | 733 | #ifdef HAVE_TARGET_32_LITTLE |
a3ad94ed | 734 | template |
5a6f7e2d | 735 | class Copy_relocs<32, false>; |
193a53d9 | 736 | #endif |
a3ad94ed | 737 | |
193a53d9 | 738 | #ifdef HAVE_TARGET_32_BIG |
a3ad94ed | 739 | template |
5a6f7e2d | 740 | class Copy_relocs<32, true>; |
193a53d9 | 741 | #endif |
a3ad94ed | 742 | |
193a53d9 | 743 | #ifdef HAVE_TARGET_64_LITTLE |
a3ad94ed | 744 | template |
5a6f7e2d | 745 | class Copy_relocs<64, false>; |
193a53d9 | 746 | #endif |
a3ad94ed | 747 | |
193a53d9 | 748 | #ifdef HAVE_TARGET_64_BIG |
a3ad94ed | 749 | template |
5a6f7e2d | 750 | class Copy_relocs<64, true>; |
193a53d9 | 751 | #endif |
5a6f7e2d | 752 | |
193a53d9 | 753 | #ifdef HAVE_TARGET_32_LITTLE |
5a6f7e2d ILT |
754 | template |
755 | void | |
756 | Copy_relocs<32, false>::emit<elfcpp::SHT_REL>( | |
757 | Output_data_reloc<elfcpp::SHT_REL, true, 32, false>*); | |
193a53d9 | 758 | #endif |
5a6f7e2d | 759 | |
193a53d9 | 760 | #ifdef HAVE_TARGET_32_BIG |
5a6f7e2d ILT |
761 | template |
762 | void | |
763 | Copy_relocs<32, true>::emit<elfcpp::SHT_REL>( | |
764 | Output_data_reloc<elfcpp::SHT_REL, true, 32, true>*); | |
193a53d9 | 765 | #endif |
5a6f7e2d | 766 | |
193a53d9 | 767 | #ifdef HAVE_TARGET_64_LITTLE |
5a6f7e2d ILT |
768 | template |
769 | void | |
770 | Copy_relocs<64, false>::emit<elfcpp::SHT_REL>( | |
771 | Output_data_reloc<elfcpp::SHT_REL, true, 64, false>*); | |
193a53d9 | 772 | #endif |
5a6f7e2d | 773 | |
193a53d9 | 774 | #ifdef HAVE_TARGET_64_BIG |
5a6f7e2d ILT |
775 | template |
776 | void | |
777 | Copy_relocs<64, true>::emit<elfcpp::SHT_REL>( | |
778 | Output_data_reloc<elfcpp::SHT_REL, true, 64, true>*); | |
193a53d9 | 779 | #endif |
5a6f7e2d | 780 | |
193a53d9 | 781 | #ifdef HAVE_TARGET_32_LITTLE |
5a6f7e2d ILT |
782 | template |
783 | void | |
784 | Copy_relocs<32, false>::emit<elfcpp::SHT_RELA>( | |
785 | Output_data_reloc<elfcpp::SHT_RELA , true, 32, false>*); | |
193a53d9 | 786 | #endif |
5a6f7e2d | 787 | |
193a53d9 | 788 | #ifdef HAVE_TARGET_32_BIG |
5a6f7e2d ILT |
789 | template |
790 | void | |
791 | Copy_relocs<32, true>::emit<elfcpp::SHT_RELA>( | |
792 | Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>*); | |
193a53d9 | 793 | #endif |
5a6f7e2d | 794 | |
193a53d9 | 795 | #ifdef HAVE_TARGET_64_LITTLE |
5a6f7e2d ILT |
796 | template |
797 | void | |
798 | Copy_relocs<64, false>::emit<elfcpp::SHT_RELA>( | |
799 | Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>*); | |
193a53d9 | 800 | #endif |
5a6f7e2d | 801 | |
193a53d9 | 802 | #ifdef HAVE_TARGET_64_BIG |
5a6f7e2d ILT |
803 | template |
804 | void | |
805 | Copy_relocs<64, true>::emit<elfcpp::SHT_RELA>( | |
806 | Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>*); | |
193a53d9 | 807 | #endif |
61ba1cf9 ILT |
808 | |
809 | } // End namespace gold. |