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a2fb1b05 ILT |
1 | // output.h -- manage the output file for gold -*- C++ -*- |
2 | ||
b3adc24a | 3 | // Copyright (C) 2006-2020 Free Software Foundation, Inc. |
6cb15b7f ILT |
4 | // Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
a2fb1b05 ILT |
23 | #ifndef GOLD_OUTPUT_H |
24 | #define GOLD_OUTPUT_H | |
25 | ||
c32482d6 | 26 | #include <algorithm> |
a2fb1b05 | 27 | #include <list> |
ead1e424 | 28 | #include <vector> |
a2fb1b05 ILT |
29 | |
30 | #include "elfcpp.h" | |
7d9e3d98 | 31 | #include "mapfile.h" |
54dc6425 | 32 | #include "layout.h" |
c06b7b0b | 33 | #include "reloc-types.h" |
a2fb1b05 ILT |
34 | |
35 | namespace gold | |
36 | { | |
37 | ||
61ba1cf9 | 38 | class General_options; |
a2fb1b05 | 39 | class Object; |
a3ad94ed | 40 | class Symbol; |
c0a62865 | 41 | class Output_merge_base; |
c06b7b0b | 42 | class Output_section; |
6a74a719 | 43 | class Relocatable_relocs; |
a3ad94ed | 44 | class Target; |
54dc6425 ILT |
45 | template<int size, bool big_endian> |
46 | class Sized_target; | |
c06b7b0b ILT |
47 | template<int size, bool big_endian> |
48 | class Sized_relobj; | |
6fa2a40b CC |
49 | template<int size, bool big_endian> |
50 | class Sized_relobj_file; | |
54dc6425 | 51 | |
c32482d6 CC |
52 | // This class represents the output file. |
53 | ||
54 | class Output_file | |
55 | { | |
56 | public: | |
57 | Output_file(const char* name); | |
58 | ||
59 | // Indicate that this is a temporary file which should not be | |
60 | // output. | |
61 | void | |
62 | set_is_temporary() | |
63 | { this->is_temporary_ = true; } | |
64 | ||
65 | // Try to open an existing file. Returns false if the file doesn't | |
66 | // exist, has a size of 0 or can't be mmaped. This method is | |
67 | // thread-unsafe. If BASE_NAME is not NULL, use the contents of | |
68 | // that file as the base for incremental linking. | |
69 | bool | |
70 | open_base_file(const char* base_name, bool writable); | |
71 | ||
72 | // Open the output file. FILE_SIZE is the final size of the file. | |
73 | // If the file already exists, it is deleted/truncated. This method | |
74 | // is thread-unsafe. | |
75 | void | |
76 | open(off_t file_size); | |
77 | ||
78 | // Resize the output file. This method is thread-unsafe. | |
79 | void | |
80 | resize(off_t file_size); | |
81 | ||
82 | // Close the output file (flushing all buffered data) and make sure | |
83 | // there are no errors. This method is thread-unsafe. | |
84 | void | |
85 | close(); | |
86 | ||
87 | // Return the size of this file. | |
88 | off_t | |
89 | filesize() | |
90 | { return this->file_size_; } | |
91 | ||
92 | // Return the name of this file. | |
93 | const char* | |
94 | filename() | |
95 | { return this->name_; } | |
96 | ||
97 | // We currently always use mmap which makes the view handling quite | |
98 | // simple. In the future we may support other approaches. | |
99 | ||
100 | // Write data to the output file. | |
101 | void | |
102 | write(off_t offset, const void* data, size_t len) | |
103 | { memcpy(this->base_ + offset, data, len); } | |
104 | ||
105 | // Get a buffer to use to write to the file, given the offset into | |
106 | // the file and the size. | |
107 | unsigned char* | |
108 | get_output_view(off_t start, size_t size) | |
109 | { | |
110 | gold_assert(start >= 0 | |
111 | && start + static_cast<off_t>(size) <= this->file_size_); | |
112 | return this->base_ + start; | |
113 | } | |
114 | ||
115 | // VIEW must have been returned by get_output_view. Write the | |
116 | // buffer to the file, passing in the offset and the size. | |
117 | void | |
118 | write_output_view(off_t, size_t, unsigned char*) | |
119 | { } | |
120 | ||
121 | // Get a read/write buffer. This is used when we want to write part | |
122 | // of the file, read it in, and write it again. | |
123 | unsigned char* | |
124 | get_input_output_view(off_t start, size_t size) | |
125 | { return this->get_output_view(start, size); } | |
126 | ||
127 | // Write a read/write buffer back to the file. | |
128 | void | |
129 | write_input_output_view(off_t, size_t, unsigned char*) | |
130 | { } | |
131 | ||
132 | // Get a read buffer. This is used when we just want to read part | |
133 | // of the file back it in. | |
134 | const unsigned char* | |
135 | get_input_view(off_t start, size_t size) | |
136 | { return this->get_output_view(start, size); } | |
137 | ||
138 | // Release a read bfufer. | |
139 | void | |
140 | free_input_view(off_t, size_t, const unsigned char*) | |
141 | { } | |
142 | ||
143 | private: | |
144 | // Map the file into memory or, if that fails, allocate anonymous | |
145 | // memory. | |
146 | void | |
147 | map(); | |
148 | ||
149 | // Allocate anonymous memory for the file. | |
150 | bool | |
151 | map_anonymous(); | |
152 | ||
153 | // Map the file into memory. | |
154 | bool | |
155 | map_no_anonymous(bool); | |
156 | ||
157 | // Unmap the file from memory (and flush to disk buffers). | |
158 | void | |
159 | unmap(); | |
160 | ||
161 | // File name. | |
162 | const char* name_; | |
163 | // File descriptor. | |
164 | int o_; | |
165 | // File size. | |
166 | off_t file_size_; | |
167 | // Base of file mapped into memory. | |
168 | unsigned char* base_; | |
169 | // True iff base_ points to a memory buffer rather than an output file. | |
170 | bool map_is_anonymous_; | |
171 | // True if base_ was allocated using new rather than mmap. | |
172 | bool map_is_allocated_; | |
173 | // True if this is a temporary file which should not be output. | |
174 | bool is_temporary_; | |
175 | }; | |
176 | ||
54dc6425 | 177 | // An abtract class for data which has to go into the output file. |
a2fb1b05 ILT |
178 | |
179 | class Output_data | |
180 | { | |
181 | public: | |
27bc2bce ILT |
182 | explicit Output_data() |
183 | : address_(0), data_size_(0), offset_(-1), | |
184 | is_address_valid_(false), is_data_size_valid_(false), | |
20e6d0d6 | 185 | is_offset_valid_(false), is_data_size_fixed_(false), |
22f0da72 | 186 | has_dynamic_reloc_(false) |
a2fb1b05 ILT |
187 | { } |
188 | ||
189 | virtual | |
190 | ~Output_data(); | |
191 | ||
27bc2bce ILT |
192 | // Return the address. For allocated sections, this is only valid |
193 | // after Layout::finalize is finished. | |
75f65a3e ILT |
194 | uint64_t |
195 | address() const | |
27bc2bce ILT |
196 | { |
197 | gold_assert(this->is_address_valid_); | |
198 | return this->address_; | |
199 | } | |
75f65a3e | 200 | |
27bc2bce ILT |
201 | // Return the size of the data. For allocated sections, this must |
202 | // be valid after Layout::finalize calls set_address, but need not | |
203 | // be valid before then. | |
a2fb1b05 | 204 | off_t |
75f65a3e | 205 | data_size() const |
27bc2bce ILT |
206 | { |
207 | gold_assert(this->is_data_size_valid_); | |
208 | return this->data_size_; | |
209 | } | |
75f65a3e | 210 | |
cdc29364 CC |
211 | // Get the current data size. |
212 | off_t | |
213 | current_data_size() const | |
214 | { return this->current_data_size_for_child(); } | |
215 | ||
20e6d0d6 DK |
216 | // Return true if data size is fixed. |
217 | bool | |
218 | is_data_size_fixed() const | |
219 | { return this->is_data_size_fixed_; } | |
34171bc5 | 220 | |
ead1e424 | 221 | // Return the file offset. This is only valid after |
27bc2bce ILT |
222 | // Layout::finalize is finished. For some non-allocated sections, |
223 | // it may not be valid until near the end of the link. | |
75f65a3e ILT |
224 | off_t |
225 | offset() const | |
27bc2bce ILT |
226 | { |
227 | gold_assert(this->is_offset_valid_); | |
228 | return this->offset_; | |
229 | } | |
75f65a3e | 230 | |
ec661b9d AM |
231 | // Reset the address, file offset and data size. This essentially |
232 | // disables the sanity testing about duplicate and unknown settings. | |
a445fddf ILT |
233 | void |
234 | reset_address_and_file_offset() | |
235 | { | |
236 | this->is_address_valid_ = false; | |
237 | this->is_offset_valid_ = false; | |
20e6d0d6 DK |
238 | if (!this->is_data_size_fixed_) |
239 | this->is_data_size_valid_ = false; | |
a445fddf ILT |
240 | this->do_reset_address_and_file_offset(); |
241 | } | |
242 | ||
ec661b9d AM |
243 | // As above, but just for data size. |
244 | void | |
245 | reset_data_size() | |
246 | { | |
247 | if (!this->is_data_size_fixed_) | |
248 | this->is_data_size_valid_ = false; | |
249 | } | |
250 | ||
20e6d0d6 DK |
251 | // Return true if address and file offset already have reset values. In |
252 | // other words, calling reset_address_and_file_offset will not change them. | |
253 | bool | |
254 | address_and_file_offset_have_reset_values() const | |
255 | { return this->do_address_and_file_offset_have_reset_values(); } | |
256 | ||
75f65a3e ILT |
257 | // Return the required alignment. |
258 | uint64_t | |
259 | addralign() const | |
260 | { return this->do_addralign(); } | |
261 | ||
a445fddf ILT |
262 | // Return whether this has a load address. |
263 | bool | |
264 | has_load_address() const | |
265 | { return this->do_has_load_address(); } | |
266 | ||
267 | // Return the load address. | |
268 | uint64_t | |
269 | load_address() const | |
270 | { return this->do_load_address(); } | |
271 | ||
75f65a3e ILT |
272 | // Return whether this is an Output_section. |
273 | bool | |
274 | is_section() const | |
275 | { return this->do_is_section(); } | |
276 | ||
277 | // Return whether this is an Output_section of the specified type. | |
278 | bool | |
279 | is_section_type(elfcpp::Elf_Word stt) const | |
280 | { return this->do_is_section_type(stt); } | |
281 | ||
282 | // Return whether this is an Output_section with the specified flag | |
283 | // set. | |
284 | bool | |
285 | is_section_flag_set(elfcpp::Elf_Xword shf) const | |
286 | { return this->do_is_section_flag_set(shf); } | |
287 | ||
77e65537 ILT |
288 | // Return the output section that this goes in, if there is one. |
289 | Output_section* | |
290 | output_section() | |
291 | { return this->do_output_section(); } | |
292 | ||
ea715a34 ILT |
293 | const Output_section* |
294 | output_section() const | |
295 | { return this->do_output_section(); } | |
296 | ||
ead1e424 ILT |
297 | // Return the output section index, if there is an output section. |
298 | unsigned int | |
299 | out_shndx() const | |
300 | { return this->do_out_shndx(); } | |
301 | ||
302 | // Set the output section index, if this is an output section. | |
303 | void | |
304 | set_out_shndx(unsigned int shndx) | |
305 | { this->do_set_out_shndx(shndx); } | |
306 | ||
27bc2bce ILT |
307 | // Set the address and file offset of this data, and finalize the |
308 | // size of the data. This is called during Layout::finalize for | |
309 | // allocated sections. | |
75f65a3e | 310 | void |
27bc2bce ILT |
311 | set_address_and_file_offset(uint64_t addr, off_t off) |
312 | { | |
313 | this->set_address(addr); | |
314 | this->set_file_offset(off); | |
315 | this->finalize_data_size(); | |
316 | } | |
317 | ||
318 | // Set the address. | |
319 | void | |
320 | set_address(uint64_t addr) | |
321 | { | |
322 | gold_assert(!this->is_address_valid_); | |
323 | this->address_ = addr; | |
324 | this->is_address_valid_ = true; | |
325 | } | |
326 | ||
327 | // Set the file offset. | |
328 | void | |
329 | set_file_offset(off_t off) | |
330 | { | |
331 | gold_assert(!this->is_offset_valid_); | |
332 | this->offset_ = off; | |
333 | this->is_offset_valid_ = true; | |
334 | } | |
335 | ||
cdc29364 CC |
336 | // Update the data size without finalizing it. |
337 | void | |
338 | pre_finalize_data_size() | |
339 | { | |
340 | if (!this->is_data_size_valid_) | |
341 | { | |
342 | // Tell the child class to update the data size. | |
343 | this->update_data_size(); | |
344 | } | |
345 | } | |
346 | ||
27bc2bce ILT |
347 | // Finalize the data size. |
348 | void | |
349 | finalize_data_size() | |
350 | { | |
351 | if (!this->is_data_size_valid_) | |
352 | { | |
353 | // Tell the child class to set the data size. | |
354 | this->set_final_data_size(); | |
355 | gold_assert(this->is_data_size_valid_); | |
356 | } | |
357 | } | |
75f65a3e | 358 | |
7bf1f802 ILT |
359 | // Set the TLS offset. Called only for SHT_TLS sections. |
360 | void | |
361 | set_tls_offset(uint64_t tls_base) | |
362 | { this->do_set_tls_offset(tls_base); } | |
363 | ||
364 | // Return the TLS offset, relative to the base of the TLS segment. | |
365 | // Valid only for SHT_TLS sections. | |
366 | uint64_t | |
367 | tls_offset() const | |
368 | { return this->do_tls_offset(); } | |
369 | ||
ead1e424 ILT |
370 | // Write the data to the output file. This is called after |
371 | // Layout::finalize is complete. | |
75f65a3e ILT |
372 | void |
373 | write(Output_file* file) | |
374 | { this->do_write(file); } | |
a2fb1b05 | 375 | |
27bc2bce ILT |
376 | // This is called by Layout::finalize to note that the sizes of |
377 | // allocated sections must now be fixed. | |
a3ad94ed ILT |
378 | static void |
379 | layout_complete() | |
27bc2bce | 380 | { Output_data::allocated_sizes_are_fixed = true; } |
a3ad94ed | 381 | |
730cdc88 ILT |
382 | // Used to check that layout has been done. |
383 | static bool | |
384 | is_layout_complete() | |
27bc2bce | 385 | { return Output_data::allocated_sizes_are_fixed; } |
730cdc88 | 386 | |
22f0da72 | 387 | // Note that a dynamic reloc has been applied to this data. |
4f4c5f80 ILT |
388 | void |
389 | add_dynamic_reloc() | |
22f0da72 | 390 | { this->has_dynamic_reloc_ = true; } |
4f4c5f80 | 391 | |
22f0da72 ILT |
392 | // Return whether a dynamic reloc has been applied. |
393 | bool | |
394 | has_dynamic_reloc() const | |
395 | { return this->has_dynamic_reloc_; } | |
4f4c5f80 | 396 | |
a9a60db6 ILT |
397 | // Whether the address is valid. |
398 | bool | |
399 | is_address_valid() const | |
400 | { return this->is_address_valid_; } | |
401 | ||
402 | // Whether the file offset is valid. | |
403 | bool | |
404 | is_offset_valid() const | |
405 | { return this->is_offset_valid_; } | |
406 | ||
407 | // Whether the data size is valid. | |
408 | bool | |
409 | is_data_size_valid() const | |
410 | { return this->is_data_size_valid_; } | |
411 | ||
7d9e3d98 ILT |
412 | // Print information to the map file. |
413 | void | |
414 | print_to_mapfile(Mapfile* mapfile) const | |
415 | { return this->do_print_to_mapfile(mapfile); } | |
416 | ||
75f65a3e ILT |
417 | protected: |
418 | // Functions that child classes may or in some cases must implement. | |
419 | ||
420 | // Write the data to the output file. | |
a2fb1b05 | 421 | virtual void |
75f65a3e ILT |
422 | do_write(Output_file*) = 0; |
423 | ||
424 | // Return the required alignment. | |
425 | virtual uint64_t | |
426 | do_addralign() const = 0; | |
427 | ||
a445fddf ILT |
428 | // Return whether this has a load address. |
429 | virtual bool | |
430 | do_has_load_address() const | |
431 | { return false; } | |
432 | ||
433 | // Return the load address. | |
434 | virtual uint64_t | |
435 | do_load_address() const | |
436 | { gold_unreachable(); } | |
437 | ||
75f65a3e ILT |
438 | // Return whether this is an Output_section. |
439 | virtual bool | |
440 | do_is_section() const | |
441 | { return false; } | |
a2fb1b05 | 442 | |
54dc6425 | 443 | // Return whether this is an Output_section of the specified type. |
75f65a3e | 444 | // This only needs to be implement by Output_section. |
54dc6425 | 445 | virtual bool |
75f65a3e | 446 | do_is_section_type(elfcpp::Elf_Word) const |
54dc6425 ILT |
447 | { return false; } |
448 | ||
75f65a3e ILT |
449 | // Return whether this is an Output_section with the specific flag |
450 | // set. This only needs to be implemented by Output_section. | |
54dc6425 | 451 | virtual bool |
75f65a3e | 452 | do_is_section_flag_set(elfcpp::Elf_Xword) const |
54dc6425 ILT |
453 | { return false; } |
454 | ||
77e65537 ILT |
455 | // Return the output section, if there is one. |
456 | virtual Output_section* | |
457 | do_output_section() | |
458 | { return NULL; } | |
459 | ||
ea715a34 ILT |
460 | virtual const Output_section* |
461 | do_output_section() const | |
462 | { return NULL; } | |
463 | ||
ead1e424 ILT |
464 | // Return the output section index, if there is an output section. |
465 | virtual unsigned int | |
466 | do_out_shndx() const | |
a3ad94ed | 467 | { gold_unreachable(); } |
ead1e424 ILT |
468 | |
469 | // Set the output section index, if this is an output section. | |
470 | virtual void | |
471 | do_set_out_shndx(unsigned int) | |
a3ad94ed | 472 | { gold_unreachable(); } |
ead1e424 | 473 | |
cdc29364 CC |
474 | // This is a hook for derived classes to set the preliminary data size. |
475 | // This is called by pre_finalize_data_size, normally called during | |
476 | // Layout::finalize, before the section address is set, and is used | |
477 | // during an incremental update, when we need to know the size of a | |
478 | // section before allocating space in the output file. For classes | |
479 | // where the current data size is up to date, this default version of | |
480 | // the method can be inherited. | |
481 | virtual void | |
482 | update_data_size() | |
483 | { } | |
484 | ||
27bc2bce ILT |
485 | // This is a hook for derived classes to set the data size. This is |
486 | // called by finalize_data_size, normally called during | |
487 | // Layout::finalize, when the section address is set. | |
75f65a3e | 488 | virtual void |
27bc2bce ILT |
489 | set_final_data_size() |
490 | { gold_unreachable(); } | |
75f65a3e | 491 | |
a445fddf ILT |
492 | // A hook for resetting the address and file offset. |
493 | virtual void | |
494 | do_reset_address_and_file_offset() | |
495 | { } | |
496 | ||
20e6d0d6 DK |
497 | // Return true if address and file offset already have reset values. In |
498 | // other words, calling reset_address_and_file_offset will not change them. | |
499 | // A child class overriding do_reset_address_and_file_offset may need to | |
500 | // also override this. | |
501 | virtual bool | |
502 | do_address_and_file_offset_have_reset_values() const | |
503 | { return !this->is_address_valid_ && !this->is_offset_valid_; } | |
504 | ||
7bf1f802 ILT |
505 | // Set the TLS offset. Called only for SHT_TLS sections. |
506 | virtual void | |
507 | do_set_tls_offset(uint64_t) | |
508 | { gold_unreachable(); } | |
509 | ||
510 | // Return the TLS offset, relative to the base of the TLS segment. | |
511 | // Valid only for SHT_TLS sections. | |
512 | virtual uint64_t | |
513 | do_tls_offset() const | |
514 | { gold_unreachable(); } | |
515 | ||
7d9e3d98 ILT |
516 | // Print to the map file. This only needs to be implemented by |
517 | // classes which may appear in a PT_LOAD segment. | |
518 | virtual void | |
519 | do_print_to_mapfile(Mapfile*) const | |
520 | { gold_unreachable(); } | |
521 | ||
75f65a3e ILT |
522 | // Functions that child classes may call. |
523 | ||
9c547ec3 ILT |
524 | // Reset the address. The Output_section class needs this when an |
525 | // SHF_ALLOC input section is added to an output section which was | |
526 | // formerly not SHF_ALLOC. | |
527 | void | |
528 | mark_address_invalid() | |
529 | { this->is_address_valid_ = false; } | |
530 | ||
a2fb1b05 ILT |
531 | // Set the size of the data. |
532 | void | |
2ea97941 | 533 | set_data_size(off_t data_size) |
a3ad94ed | 534 | { |
20e6d0d6 DK |
535 | gold_assert(!this->is_data_size_valid_ |
536 | && !this->is_data_size_fixed_); | |
2ea97941 | 537 | this->data_size_ = data_size; |
27bc2bce ILT |
538 | this->is_data_size_valid_ = true; |
539 | } | |
540 | ||
20e6d0d6 | 541 | // Fix the data size. Once it is fixed, it cannot be changed |
34171bc5 | 542 | // and the data size remains always valid. |
20e6d0d6 DK |
543 | void |
544 | fix_data_size() | |
545 | { | |
546 | gold_assert(this->is_data_size_valid_); | |
547 | this->is_data_size_fixed_ = true; | |
548 | } | |
549 | ||
27bc2bce ILT |
550 | // Get the current data size--this is for the convenience of |
551 | // sections which build up their size over time. | |
552 | off_t | |
553 | current_data_size_for_child() const | |
554 | { return this->data_size_; } | |
555 | ||
556 | // Set the current data size--this is for the convenience of | |
557 | // sections which build up their size over time. | |
558 | void | |
2ea97941 | 559 | set_current_data_size_for_child(off_t data_size) |
27bc2bce ILT |
560 | { |
561 | gold_assert(!this->is_data_size_valid_); | |
2ea97941 | 562 | this->data_size_ = data_size; |
a3ad94ed | 563 | } |
75f65a3e | 564 | |
730cdc88 ILT |
565 | // Return default alignment for the target size. |
566 | static uint64_t | |
567 | default_alignment(); | |
568 | ||
569 | // Return default alignment for a specified size--32 or 64. | |
75f65a3e | 570 | static uint64_t |
730cdc88 | 571 | default_alignment_for_size(int size); |
a2fb1b05 ILT |
572 | |
573 | private: | |
574 | Output_data(const Output_data&); | |
575 | Output_data& operator=(const Output_data&); | |
576 | ||
a3ad94ed | 577 | // This is used for verification, to make sure that we don't try to |
27bc2bce ILT |
578 | // change any sizes of allocated sections after we set the section |
579 | // addresses. | |
580 | static bool allocated_sizes_are_fixed; | |
a3ad94ed | 581 | |
27bc2bce | 582 | // Memory address in output file. |
75f65a3e | 583 | uint64_t address_; |
27bc2bce | 584 | // Size of data in output file. |
75f65a3e | 585 | off_t data_size_; |
27bc2bce | 586 | // File offset of contents in output file. |
75f65a3e | 587 | off_t offset_; |
27bc2bce | 588 | // Whether address_ is valid. |
22f0da72 | 589 | bool is_address_valid_ : 1; |
27bc2bce | 590 | // Whether data_size_ is valid. |
22f0da72 | 591 | bool is_data_size_valid_ : 1; |
27bc2bce | 592 | // Whether offset_ is valid. |
22f0da72 | 593 | bool is_offset_valid_ : 1; |
20e6d0d6 | 594 | // Whether data size is fixed. |
22f0da72 ILT |
595 | bool is_data_size_fixed_ : 1; |
596 | // Whether any dynamic relocs have been applied to this section. | |
597 | bool has_dynamic_reloc_ : 1; | |
a2fb1b05 ILT |
598 | }; |
599 | ||
54dc6425 ILT |
600 | // Output the section headers. |
601 | ||
602 | class Output_section_headers : public Output_data | |
603 | { | |
604 | public: | |
9025d29d | 605 | Output_section_headers(const Layout*, |
16649710 ILT |
606 | const Layout::Segment_list*, |
607 | const Layout::Section_list*, | |
6a74a719 | 608 | const Layout::Section_list*, |
d491d34e ILT |
609 | const Stringpool*, |
610 | const Output_section*); | |
54dc6425 | 611 | |
27bc2bce | 612 | protected: |
54dc6425 ILT |
613 | // Write the data to the file. |
614 | void | |
75f65a3e ILT |
615 | do_write(Output_file*); |
616 | ||
617 | // Return the required alignment. | |
618 | uint64_t | |
619 | do_addralign() const | |
730cdc88 | 620 | { return Output_data::default_alignment(); } |
54dc6425 | 621 | |
7d9e3d98 ILT |
622 | // Write to a map file. |
623 | void | |
624 | do_print_to_mapfile(Mapfile* mapfile) const | |
625 | { mapfile->print_output_data(this, _("** section headers")); } | |
626 | ||
cdc29364 CC |
627 | // Update the data size. |
628 | void | |
629 | update_data_size() | |
630 | { this->set_data_size(this->do_size()); } | |
631 | ||
20e6d0d6 DK |
632 | // Set final data size. |
633 | void | |
634 | set_final_data_size() | |
635 | { this->set_data_size(this->do_size()); } | |
636 | ||
54dc6425 | 637 | private: |
61ba1cf9 ILT |
638 | // Write the data to the file with the right size and endianness. |
639 | template<int size, bool big_endian> | |
640 | void | |
641 | do_sized_write(Output_file*); | |
642 | ||
20e6d0d6 DK |
643 | // Compute data size. |
644 | off_t | |
645 | do_size() const; | |
646 | ||
16649710 ILT |
647 | const Layout* layout_; |
648 | const Layout::Segment_list* segment_list_; | |
6a74a719 | 649 | const Layout::Section_list* section_list_; |
16649710 | 650 | const Layout::Section_list* unattached_section_list_; |
61ba1cf9 | 651 | const Stringpool* secnamepool_; |
d491d34e | 652 | const Output_section* shstrtab_section_; |
54dc6425 ILT |
653 | }; |
654 | ||
655 | // Output the segment headers. | |
656 | ||
657 | class Output_segment_headers : public Output_data | |
658 | { | |
659 | public: | |
9025d29d | 660 | Output_segment_headers(const Layout::Segment_list& segment_list); |
54dc6425 | 661 | |
27bc2bce | 662 | protected: |
54dc6425 ILT |
663 | // Write the data to the file. |
664 | void | |
75f65a3e ILT |
665 | do_write(Output_file*); |
666 | ||
667 | // Return the required alignment. | |
668 | uint64_t | |
669 | do_addralign() const | |
730cdc88 | 670 | { return Output_data::default_alignment(); } |
54dc6425 | 671 | |
7d9e3d98 ILT |
672 | // Write to a map file. |
673 | void | |
674 | do_print_to_mapfile(Mapfile* mapfile) const | |
675 | { mapfile->print_output_data(this, _("** segment headers")); } | |
676 | ||
20e6d0d6 DK |
677 | // Set final data size. |
678 | void | |
679 | set_final_data_size() | |
680 | { this->set_data_size(this->do_size()); } | |
681 | ||
54dc6425 | 682 | private: |
61ba1cf9 ILT |
683 | // Write the data to the file with the right size and endianness. |
684 | template<int size, bool big_endian> | |
685 | void | |
686 | do_sized_write(Output_file*); | |
687 | ||
20e6d0d6 DK |
688 | // Compute the current size. |
689 | off_t | |
690 | do_size() const; | |
691 | ||
54dc6425 ILT |
692 | const Layout::Segment_list& segment_list_; |
693 | }; | |
694 | ||
695 | // Output the ELF file header. | |
696 | ||
697 | class Output_file_header : public Output_data | |
698 | { | |
699 | public: | |
cc84c10b | 700 | Output_file_header(Target*, |
54dc6425 | 701 | const Symbol_table*, |
a10ae760 | 702 | const Output_segment_headers*); |
75f65a3e ILT |
703 | |
704 | // Add information about the section headers. We lay out the ELF | |
705 | // file header before we create the section headers. | |
706 | void set_section_info(const Output_section_headers*, | |
707 | const Output_section* shstrtab); | |
54dc6425 | 708 | |
27bc2bce | 709 | protected: |
54dc6425 ILT |
710 | // Write the data to the file. |
711 | void | |
75f65a3e ILT |
712 | do_write(Output_file*); |
713 | ||
714 | // Return the required alignment. | |
715 | uint64_t | |
716 | do_addralign() const | |
730cdc88 | 717 | { return Output_data::default_alignment(); } |
75f65a3e | 718 | |
7d9e3d98 ILT |
719 | // Write to a map file. |
720 | void | |
721 | do_print_to_mapfile(Mapfile* mapfile) const | |
722 | { mapfile->print_output_data(this, _("** file header")); } | |
723 | ||
20e6d0d6 DK |
724 | // Set final data size. |
725 | void | |
726 | set_final_data_size(void) | |
727 | { this->set_data_size(this->do_size()); } | |
728 | ||
54dc6425 | 729 | private: |
61ba1cf9 ILT |
730 | // Write the data to the file with the right size and endianness. |
731 | template<int size, bool big_endian> | |
732 | void | |
733 | do_sized_write(Output_file*); | |
734 | ||
d391083d ILT |
735 | // Return the value to use for the entry address. |
736 | template<int size> | |
737 | typename elfcpp::Elf_types<size>::Elf_Addr | |
738 | entry(); | |
739 | ||
20e6d0d6 DK |
740 | // Compute the current data size. |
741 | off_t | |
742 | do_size() const; | |
743 | ||
cc84c10b | 744 | Target* target_; |
54dc6425 | 745 | const Symbol_table* symtab_; |
61ba1cf9 | 746 | const Output_segment_headers* segment_header_; |
54dc6425 ILT |
747 | const Output_section_headers* section_header_; |
748 | const Output_section* shstrtab_; | |
749 | }; | |
750 | ||
ead1e424 ILT |
751 | // Output sections are mainly comprised of input sections. However, |
752 | // there are cases where we have data to write out which is not in an | |
753 | // input section. Output_section_data is used in such cases. This is | |
754 | // an abstract base class. | |
755 | ||
756 | class Output_section_data : public Output_data | |
757 | { | |
758 | public: | |
2ea97941 ILT |
759 | Output_section_data(off_t data_size, uint64_t addralign, |
760 | bool is_data_size_fixed) | |
761 | : Output_data(), output_section_(NULL), addralign_(addralign) | |
20e6d0d6 | 762 | { |
2ea97941 ILT |
763 | this->set_data_size(data_size); |
764 | if (is_data_size_fixed) | |
20e6d0d6 DK |
765 | this->fix_data_size(); |
766 | } | |
ead1e424 | 767 | |
2ea97941 ILT |
768 | Output_section_data(uint64_t addralign) |
769 | : Output_data(), output_section_(NULL), addralign_(addralign) | |
ead1e424 ILT |
770 | { } |
771 | ||
16649710 | 772 | // Return the output section. |
7223e9ca ILT |
773 | Output_section* |
774 | output_section() | |
775 | { return this->output_section_; } | |
776 | ||
16649710 ILT |
777 | const Output_section* |
778 | output_section() const | |
779 | { return this->output_section_; } | |
780 | ||
ead1e424 ILT |
781 | // Record the output section. |
782 | void | |
16649710 | 783 | set_output_section(Output_section* os); |
ead1e424 | 784 | |
b8e6aad9 ILT |
785 | // Add an input section, for SHF_MERGE sections. This returns true |
786 | // if the section was handled. | |
787 | bool | |
788 | add_input_section(Relobj* object, unsigned int shndx) | |
789 | { return this->do_add_input_section(object, shndx); } | |
790 | ||
791 | // Given an input OBJECT, an input section index SHNDX within that | |
792 | // object, and an OFFSET relative to the start of that input | |
730cdc88 ILT |
793 | // section, return whether or not the corresponding offset within |
794 | // the output section is known. If this function returns true, it | |
795 | // sets *POUTPUT to the output offset. The value -1 indicates that | |
796 | // this input offset is being discarded. | |
8f00aeb8 | 797 | bool |
8383303e | 798 | output_offset(const Relobj* object, unsigned int shndx, |
2ea97941 | 799 | section_offset_type offset, |
ca09d69a | 800 | section_offset_type* poutput) const |
2ea97941 | 801 | { return this->do_output_offset(object, shndx, offset, poutput); } |
b8e6aad9 | 802 | |
96803768 ILT |
803 | // Write the contents to a buffer. This is used for sections which |
804 | // require postprocessing, such as compression. | |
805 | void | |
806 | write_to_buffer(unsigned char* buffer) | |
807 | { this->do_write_to_buffer(buffer); } | |
808 | ||
38c5e8b4 ILT |
809 | // Print merge stats to stderr. This should only be called for |
810 | // SHF_MERGE sections. | |
811 | void | |
812 | print_merge_stats(const char* section_name) | |
813 | { this->do_print_merge_stats(section_name); } | |
814 | ||
ead1e424 ILT |
815 | protected: |
816 | // The child class must implement do_write. | |
817 | ||
16649710 ILT |
818 | // The child class may implement specific adjustments to the output |
819 | // section. | |
820 | virtual void | |
821 | do_adjust_output_section(Output_section*) | |
822 | { } | |
823 | ||
b8e6aad9 ILT |
824 | // May be implemented by child class. Return true if the section |
825 | // was handled. | |
826 | virtual bool | |
827 | do_add_input_section(Relobj*, unsigned int) | |
828 | { gold_unreachable(); } | |
829 | ||
730cdc88 | 830 | // The child class may implement output_offset. |
b8e6aad9 | 831 | virtual bool |
8383303e ILT |
832 | do_output_offset(const Relobj*, unsigned int, section_offset_type, |
833 | section_offset_type*) const | |
b8e6aad9 ILT |
834 | { return false; } |
835 | ||
96803768 ILT |
836 | // The child class may implement write_to_buffer. Most child |
837 | // classes can not appear in a compressed section, and they do not | |
838 | // implement this. | |
839 | virtual void | |
840 | do_write_to_buffer(unsigned char*) | |
841 | { gold_unreachable(); } | |
842 | ||
38c5e8b4 ILT |
843 | // Print merge statistics. |
844 | virtual void | |
845 | do_print_merge_stats(const char*) | |
846 | { gold_unreachable(); } | |
847 | ||
ead1e424 ILT |
848 | // Return the required alignment. |
849 | uint64_t | |
850 | do_addralign() const | |
851 | { return this->addralign_; } | |
852 | ||
77e65537 ILT |
853 | // Return the output section. |
854 | Output_section* | |
855 | do_output_section() | |
856 | { return this->output_section_; } | |
857 | ||
ea715a34 ILT |
858 | const Output_section* |
859 | do_output_section() const | |
860 | { return this->output_section_; } | |
861 | ||
ead1e424 ILT |
862 | // Return the section index of the output section. |
863 | unsigned int | |
864 | do_out_shndx() const; | |
865 | ||
5a6f7e2d ILT |
866 | // Set the alignment. |
867 | void | |
759b1a24 | 868 | set_addralign(uint64_t addralign); |
5a6f7e2d | 869 | |
ead1e424 ILT |
870 | private: |
871 | // The output section for this section. | |
77e65537 | 872 | Output_section* output_section_; |
ead1e424 ILT |
873 | // The required alignment. |
874 | uint64_t addralign_; | |
875 | }; | |
876 | ||
27bc2bce ILT |
877 | // Some Output_section_data classes build up their data step by step, |
878 | // rather than all at once. This class provides an interface for | |
879 | // them. | |
880 | ||
881 | class Output_section_data_build : public Output_section_data | |
882 | { | |
883 | public: | |
2ea97941 ILT |
884 | Output_section_data_build(uint64_t addralign) |
885 | : Output_section_data(addralign) | |
27bc2bce ILT |
886 | { } |
887 | ||
4829d394 CC |
888 | Output_section_data_build(off_t data_size, uint64_t addralign) |
889 | : Output_section_data(data_size, addralign, false) | |
890 | { } | |
891 | ||
27bc2bce ILT |
892 | // Set the current data size. |
893 | void | |
2ea97941 ILT |
894 | set_current_data_size(off_t data_size) |
895 | { this->set_current_data_size_for_child(data_size); } | |
27bc2bce ILT |
896 | |
897 | protected: | |
898 | // Set the final data size. | |
899 | virtual void | |
900 | set_final_data_size() | |
901 | { this->set_data_size(this->current_data_size_for_child()); } | |
902 | }; | |
903 | ||
dbe717ef ILT |
904 | // A simple case of Output_data in which we have constant data to |
905 | // output. | |
ead1e424 | 906 | |
dbe717ef | 907 | class Output_data_const : public Output_section_data |
ead1e424 ILT |
908 | { |
909 | public: | |
2ea97941 ILT |
910 | Output_data_const(const std::string& data, uint64_t addralign) |
911 | : Output_section_data(data.size(), addralign, true), data_(data) | |
dbe717ef ILT |
912 | { } |
913 | ||
2ea97941 ILT |
914 | Output_data_const(const char* p, off_t len, uint64_t addralign) |
915 | : Output_section_data(len, addralign, true), data_(p, len) | |
dbe717ef ILT |
916 | { } |
917 | ||
2ea97941 ILT |
918 | Output_data_const(const unsigned char* p, off_t len, uint64_t addralign) |
919 | : Output_section_data(len, addralign, true), | |
dbe717ef ILT |
920 | data_(reinterpret_cast<const char*>(p), len) |
921 | { } | |
922 | ||
27bc2bce | 923 | protected: |
a3ad94ed | 924 | // Write the data to the output file. |
dbe717ef | 925 | void |
a3ad94ed | 926 | do_write(Output_file*); |
dbe717ef | 927 | |
96803768 ILT |
928 | // Write the data to a buffer. |
929 | void | |
930 | do_write_to_buffer(unsigned char* buffer) | |
931 | { memcpy(buffer, this->data_.data(), this->data_.size()); } | |
932 | ||
7d9e3d98 ILT |
933 | // Write to a map file. |
934 | void | |
935 | do_print_to_mapfile(Mapfile* mapfile) const | |
936 | { mapfile->print_output_data(this, _("** fill")); } | |
937 | ||
dbe717ef ILT |
938 | private: |
939 | std::string data_; | |
940 | }; | |
941 | ||
a3ad94ed ILT |
942 | // Another version of Output_data with constant data, in which the |
943 | // buffer is allocated by the caller. | |
dbe717ef | 944 | |
a3ad94ed | 945 | class Output_data_const_buffer : public Output_section_data |
dbe717ef ILT |
946 | { |
947 | public: | |
a3ad94ed | 948 | Output_data_const_buffer(const unsigned char* p, off_t len, |
2ea97941 ILT |
949 | uint64_t addralign, const char* map_name) |
950 | : Output_section_data(len, addralign, true), | |
7d9e3d98 | 951 | p_(p), map_name_(map_name) |
a3ad94ed ILT |
952 | { } |
953 | ||
27bc2bce | 954 | protected: |
a3ad94ed ILT |
955 | // Write the data the output file. |
956 | void | |
957 | do_write(Output_file*); | |
958 | ||
96803768 ILT |
959 | // Write the data to a buffer. |
960 | void | |
961 | do_write_to_buffer(unsigned char* buffer) | |
962 | { memcpy(buffer, this->p_, this->data_size()); } | |
963 | ||
7d9e3d98 ILT |
964 | // Write to a map file. |
965 | void | |
966 | do_print_to_mapfile(Mapfile* mapfile) const | |
967 | { mapfile->print_output_data(this, _(this->map_name_)); } | |
968 | ||
a3ad94ed | 969 | private: |
7d9e3d98 | 970 | // The data to output. |
a3ad94ed | 971 | const unsigned char* p_; |
7d9e3d98 ILT |
972 | // Name to use in a map file. Maps are a rarely used feature, but |
973 | // the space usage is minor as aren't very many of these objects. | |
974 | const char* map_name_; | |
a3ad94ed ILT |
975 | }; |
976 | ||
27bc2bce ILT |
977 | // A place holder for a fixed amount of data written out via some |
978 | // other mechanism. | |
a3ad94ed | 979 | |
27bc2bce | 980 | class Output_data_fixed_space : public Output_section_data |
a3ad94ed ILT |
981 | { |
982 | public: | |
2ea97941 | 983 | Output_data_fixed_space(off_t data_size, uint64_t addralign, |
7d9e3d98 | 984 | const char* map_name) |
2ea97941 | 985 | : Output_section_data(data_size, addralign, true), |
7d9e3d98 | 986 | map_name_(map_name) |
a3ad94ed ILT |
987 | { } |
988 | ||
27bc2bce ILT |
989 | protected: |
990 | // Write out the data--the actual data must be written out | |
991 | // elsewhere. | |
992 | void | |
993 | do_write(Output_file*) | |
ead1e424 | 994 | { } |
7d9e3d98 ILT |
995 | |
996 | // Write to a map file. | |
997 | void | |
998 | do_print_to_mapfile(Mapfile* mapfile) const | |
999 | { mapfile->print_output_data(this, _(this->map_name_)); } | |
1000 | ||
1001 | private: | |
1002 | // Name to use in a map file. Maps are a rarely used feature, but | |
1003 | // the space usage is minor as aren't very many of these objects. | |
1004 | const char* map_name_; | |
27bc2bce | 1005 | }; |
ead1e424 | 1006 | |
27bc2bce ILT |
1007 | // A place holder for variable sized data written out via some other |
1008 | // mechanism. | |
1009 | ||
1010 | class Output_data_space : public Output_section_data_build | |
1011 | { | |
1012 | public: | |
2ea97941 ILT |
1013 | explicit Output_data_space(uint64_t addralign, const char* map_name) |
1014 | : Output_section_data_build(addralign), | |
7d9e3d98 | 1015 | map_name_(map_name) |
27bc2bce | 1016 | { } |
ead1e424 | 1017 | |
4829d394 CC |
1018 | explicit Output_data_space(off_t data_size, uint64_t addralign, |
1019 | const char* map_name) | |
1020 | : Output_section_data_build(data_size, addralign), | |
1021 | map_name_(map_name) | |
1022 | { } | |
1023 | ||
5a6f7e2d ILT |
1024 | // Set the alignment. |
1025 | void | |
1026 | set_space_alignment(uint64_t align) | |
1027 | { this->set_addralign(align); } | |
1028 | ||
27bc2bce ILT |
1029 | protected: |
1030 | // Write out the data--the actual data must be written out | |
1031 | // elsewhere. | |
ead1e424 ILT |
1032 | void |
1033 | do_write(Output_file*) | |
1034 | { } | |
7d9e3d98 ILT |
1035 | |
1036 | // Write to a map file. | |
1037 | void | |
1038 | do_print_to_mapfile(Mapfile* mapfile) const | |
1039 | { mapfile->print_output_data(this, _(this->map_name_)); } | |
1040 | ||
1041 | private: | |
1042 | // Name to use in a map file. Maps are a rarely used feature, but | |
1043 | // the space usage is minor as aren't very many of these objects. | |
1044 | const char* map_name_; | |
1045 | }; | |
1046 | ||
1047 | // Fill fixed space with zeroes. This is just like | |
1048 | // Output_data_fixed_space, except that the map name is known. | |
1049 | ||
1050 | class Output_data_zero_fill : public Output_section_data | |
1051 | { | |
1052 | public: | |
2ea97941 ILT |
1053 | Output_data_zero_fill(off_t data_size, uint64_t addralign) |
1054 | : Output_section_data(data_size, addralign, true) | |
7d9e3d98 ILT |
1055 | { } |
1056 | ||
1057 | protected: | |
1058 | // There is no data to write out. | |
1059 | void | |
1060 | do_write(Output_file*) | |
1061 | { } | |
1062 | ||
1063 | // Write to a map file. | |
1064 | void | |
1065 | do_print_to_mapfile(Mapfile* mapfile) const | |
1066 | { mapfile->print_output_data(this, "** zero fill"); } | |
ead1e424 ILT |
1067 | }; |
1068 | ||
a3ad94ed ILT |
1069 | // A string table which goes into an output section. |
1070 | ||
1071 | class Output_data_strtab : public Output_section_data | |
1072 | { | |
1073 | public: | |
1074 | Output_data_strtab(Stringpool* strtab) | |
1075 | : Output_section_data(1), strtab_(strtab) | |
1076 | { } | |
1077 | ||
27bc2bce | 1078 | protected: |
cdc29364 CC |
1079 | // This is called to update the section size prior to assigning |
1080 | // the address and file offset. | |
1081 | void | |
1082 | update_data_size() | |
1083 | { this->set_final_data_size(); } | |
1084 | ||
a3ad94ed ILT |
1085 | // This is called to set the address and file offset. Here we make |
1086 | // sure that the Stringpool is finalized. | |
1087 | void | |
27bc2bce | 1088 | set_final_data_size(); |
a3ad94ed ILT |
1089 | |
1090 | // Write out the data. | |
1091 | void | |
1092 | do_write(Output_file*); | |
1093 | ||
96803768 ILT |
1094 | // Write the data to a buffer. |
1095 | void | |
1096 | do_write_to_buffer(unsigned char* buffer) | |
1097 | { this->strtab_->write_to_buffer(buffer, this->data_size()); } | |
1098 | ||
7d9e3d98 ILT |
1099 | // Write to a map file. |
1100 | void | |
1101 | do_print_to_mapfile(Mapfile* mapfile) const | |
1102 | { mapfile->print_output_data(this, _("** string table")); } | |
1103 | ||
a3ad94ed ILT |
1104 | private: |
1105 | Stringpool* strtab_; | |
1106 | }; | |
1107 | ||
c06b7b0b ILT |
1108 | // This POD class is used to represent a single reloc in the output |
1109 | // file. This could be a private class within Output_data_reloc, but | |
1110 | // the templatization is complex enough that I broke it out into a | |
1111 | // separate class. The class is templatized on either elfcpp::SHT_REL | |
1112 | // or elfcpp::SHT_RELA, and also on whether this is a dynamic | |
1113 | // relocation or an ordinary relocation. | |
1114 | ||
dceae3c1 ILT |
1115 | // A relocation can be against a global symbol, a local symbol, a |
1116 | // local section symbol, an output section, or the undefined symbol at | |
1117 | // index 0. We represent the latter by using a NULL global symbol. | |
c06b7b0b ILT |
1118 | |
1119 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
1120 | class Output_reloc; | |
1121 | ||
1122 | template<bool dynamic, int size, bool big_endian> | |
1123 | class Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> | |
1124 | { | |
1125 | public: | |
1126 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
624f8810 | 1127 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend; |
c06b7b0b | 1128 | |
eff45813 CC |
1129 | static const Address invalid_address = static_cast<Address>(0) - 1; |
1130 | ||
c06b7b0b ILT |
1131 | // An uninitialized entry. We need this because we want to put |
1132 | // instances of this class into an STL container. | |
1133 | Output_reloc() | |
1134 | : local_sym_index_(INVALID_CODE) | |
1135 | { } | |
1136 | ||
dceae3c1 ILT |
1137 | // We have a bunch of different constructors. They come in pairs |
1138 | // depending on how the address of the relocation is specified. It | |
1139 | // can either be an offset in an Output_data or an offset in an | |
1140 | // input section. | |
1141 | ||
c06b7b0b | 1142 | // A reloc against a global symbol. |
5a6f7e2d | 1143 | |
a3ad94ed | 1144 | Output_reloc(Symbol* gsym, unsigned int type, Output_data* od, |
13cf9988 DM |
1145 | Address address, bool is_relative, bool is_symbolless, |
1146 | bool use_plt_offset); | |
5a6f7e2d | 1147 | |
ef9beddf | 1148 | Output_reloc(Symbol* gsym, unsigned int type, |
34171bc5 | 1149 | Sized_relobj<size, big_endian>* relobj, |
0da6fa6c | 1150 | unsigned int shndx, Address address, bool is_relative, |
13cf9988 | 1151 | bool is_symbolless, bool use_plt_offset); |
c06b7b0b | 1152 | |
dceae3c1 | 1153 | // A reloc against a local symbol or local section symbol. |
5a6f7e2d ILT |
1154 | |
1155 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
7bf1f802 | 1156 | unsigned int local_sym_index, unsigned int type, |
dceae3c1 | 1157 | Output_data* od, Address address, bool is_relative, |
34171bc5 AM |
1158 | bool is_symbolless, bool is_section_symbol, |
1159 | bool use_plt_offset); | |
5a6f7e2d ILT |
1160 | |
1161 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
7bf1f802 | 1162 | unsigned int local_sym_index, unsigned int type, |
dceae3c1 | 1163 | unsigned int shndx, Address address, bool is_relative, |
34171bc5 AM |
1164 | bool is_symbolless, bool is_section_symbol, |
1165 | bool use_plt_offset); | |
c06b7b0b ILT |
1166 | |
1167 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 1168 | |
a3ad94ed | 1169 | Output_reloc(Output_section* os, unsigned int type, Output_data* od, |
703d02da | 1170 | Address address, bool is_relative); |
5a6f7e2d | 1171 | |
ef9beddf | 1172 | Output_reloc(Output_section* os, unsigned int type, |
703d02da AM |
1173 | Sized_relobj<size, big_endian>* relobj, unsigned int shndx, |
1174 | Address address, bool is_relative); | |
c06b7b0b | 1175 | |
ec661b9d | 1176 | // An absolute or relative relocation with no symbol. |
e291e7b9 | 1177 | |
ec661b9d AM |
1178 | Output_reloc(unsigned int type, Output_data* od, Address address, |
1179 | bool is_relative); | |
e291e7b9 ILT |
1180 | |
1181 | Output_reloc(unsigned int type, Sized_relobj<size, big_endian>* relobj, | |
ec661b9d | 1182 | unsigned int shndx, Address address, bool is_relative); |
e291e7b9 ILT |
1183 | |
1184 | // A target specific relocation. The target will be called to get | |
1185 | // the symbol index, passing ARG. The type and offset will be set | |
1186 | // as for other relocation types. | |
1187 | ||
1188 | Output_reloc(unsigned int type, void* arg, Output_data* od, | |
1189 | Address address); | |
1190 | ||
1191 | Output_reloc(unsigned int type, void* arg, | |
1192 | Sized_relobj<size, big_endian>* relobj, | |
1193 | unsigned int shndx, Address address); | |
1194 | ||
1195 | // Return the reloc type. | |
1196 | unsigned int | |
1197 | type() const | |
1198 | { return this->type_; } | |
1199 | ||
1200 | // Return whether this is a RELATIVE relocation. | |
e8c846c3 ILT |
1201 | bool |
1202 | is_relative() const | |
1203 | { return this->is_relative_; } | |
1204 | ||
0da6fa6c DM |
1205 | // Return whether this is a relocation which should not use |
1206 | // a symbol, but which obtains its addend from a symbol. | |
1207 | bool | |
1208 | is_symbolless() const | |
1209 | { return this->is_symbolless_; } | |
1210 | ||
dceae3c1 ILT |
1211 | // Return whether this is against a local section symbol. |
1212 | bool | |
1213 | is_local_section_symbol() const | |
1214 | { | |
1215 | return (this->local_sym_index_ != GSYM_CODE | |
34171bc5 AM |
1216 | && this->local_sym_index_ != SECTION_CODE |
1217 | && this->local_sym_index_ != INVALID_CODE | |
e291e7b9 | 1218 | && this->local_sym_index_ != TARGET_CODE |
34171bc5 | 1219 | && this->is_section_symbol_); |
dceae3c1 ILT |
1220 | } |
1221 | ||
e291e7b9 ILT |
1222 | // Return whether this is a target specific relocation. |
1223 | bool | |
1224 | is_target_specific() const | |
1225 | { return this->local_sym_index_ == TARGET_CODE; } | |
1226 | ||
1227 | // Return the argument to pass to the target for a target specific | |
1228 | // relocation. | |
1229 | void* | |
1230 | target_arg() const | |
1231 | { | |
1232 | gold_assert(this->local_sym_index_ == TARGET_CODE); | |
1233 | return this->u1_.arg; | |
1234 | } | |
1235 | ||
dceae3c1 | 1236 | // For a local section symbol, return the offset of the input |
624f8810 ILT |
1237 | // section within the output section. ADDEND is the addend being |
1238 | // applied to the input section. | |
ef9beddf | 1239 | Address |
624f8810 | 1240 | local_section_offset(Addend addend) const; |
dceae3c1 | 1241 | |
d1f003c6 ILT |
1242 | // Get the value of the symbol referred to by a Rel relocation when |
1243 | // we are adding the given ADDEND. | |
e8c846c3 | 1244 | Address |
624f8810 | 1245 | symbol_value(Addend addend) const; |
e8c846c3 | 1246 | |
6fa2a40b CC |
1247 | // If this relocation is against an input section, return the |
1248 | // relocatable object containing the input section. | |
1249 | Sized_relobj<size, big_endian>* | |
1250 | get_relobj() const | |
1251 | { | |
1252 | if (this->shndx_ == INVALID_CODE) | |
1253 | return NULL; | |
1254 | return this->u2_.relobj; | |
1255 | } | |
1256 | ||
c06b7b0b ILT |
1257 | // Write the reloc entry to an output view. |
1258 | void | |
1259 | write(unsigned char* pov) const; | |
1260 | ||
1261 | // Write the offset and info fields to Write_rel. | |
1262 | template<typename Write_rel> | |
1263 | void write_rel(Write_rel*) const; | |
1264 | ||
d98bc257 ILT |
1265 | // This is used when sorting dynamic relocs. Return -1 to sort this |
1266 | // reloc before R2, 0 to sort the same as R2, 1 to sort after R2. | |
1267 | int | |
1268 | compare(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& r2) | |
1269 | const; | |
1270 | ||
1271 | // Return whether this reloc should be sorted before the argument | |
1272 | // when sorting dynamic relocs. | |
1273 | bool | |
1274 | sort_before(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& | |
1275 | r2) const | |
1276 | { return this->compare(r2) < 0; } | |
1277 | ||
dceae3c1 | 1278 | // Return the symbol index. |
c06b7b0b ILT |
1279 | unsigned int |
1280 | get_symbol_index() const; | |
1281 | ||
d98bc257 | 1282 | // Return the output address. |
a984ee1d | 1283 | Address |
d98bc257 ILT |
1284 | get_address() const; |
1285 | ||
c32482d6 CC |
1286 | private: |
1287 | // Record that we need a dynamic symbol index. | |
1288 | void | |
1289 | set_needs_dynsym_index(); | |
1290 | ||
c06b7b0b ILT |
1291 | // Codes for local_sym_index_. |
1292 | enum | |
1293 | { | |
1294 | // Global symbol. | |
1295 | GSYM_CODE = -1U, | |
1296 | // Output section. | |
1297 | SECTION_CODE = -2U, | |
e291e7b9 ILT |
1298 | // Target specific. |
1299 | TARGET_CODE = -3U, | |
c06b7b0b | 1300 | // Invalid uninitialized entry. |
e291e7b9 | 1301 | INVALID_CODE = -4U |
c06b7b0b ILT |
1302 | }; |
1303 | ||
1304 | union | |
1305 | { | |
dceae3c1 ILT |
1306 | // For a local symbol or local section symbol |
1307 | // (this->local_sym_index_ >= 0), the object. We will never | |
1308 | // generate a relocation against a local symbol in a dynamic | |
1309 | // object; that doesn't make sense. And our callers will always | |
1310 | // be templatized, so we use Sized_relobj here. | |
5a6f7e2d | 1311 | Sized_relobj<size, big_endian>* relobj; |
dceae3c1 ILT |
1312 | // For a global symbol (this->local_sym_index_ == GSYM_CODE, the |
1313 | // symbol. If this is NULL, it indicates a relocation against the | |
1314 | // undefined 0 symbol. | |
c06b7b0b | 1315 | Symbol* gsym; |
dceae3c1 ILT |
1316 | // For a relocation against an output section |
1317 | // (this->local_sym_index_ == SECTION_CODE), the output section. | |
c06b7b0b | 1318 | Output_section* os; |
e291e7b9 ILT |
1319 | // For a target specific relocation, an argument to pass to the |
1320 | // target. | |
1321 | void* arg; | |
5a6f7e2d ILT |
1322 | } u1_; |
1323 | union | |
1324 | { | |
dceae3c1 ILT |
1325 | // If this->shndx_ is not INVALID CODE, the object which holds the |
1326 | // input section being used to specify the reloc address. | |
ef9beddf | 1327 | Sized_relobj<size, big_endian>* relobj; |
dceae3c1 | 1328 | // If this->shndx_ is INVALID_CODE, the output data being used to |
5a6f7e2d ILT |
1329 | // specify the reloc address. This may be NULL if the reloc |
1330 | // address is absolute. | |
1331 | Output_data* od; | |
1332 | } u2_; | |
1333 | // The address offset within the input section or the Output_data. | |
1334 | Address address_; | |
dceae3c1 | 1335 | // This is GSYM_CODE for a global symbol, or SECTION_CODE for a |
e291e7b9 ILT |
1336 | // relocation against an output section, or TARGET_CODE for a target |
1337 | // specific relocation, or INVALID_CODE for an uninitialized value. | |
1338 | // Otherwise, for a local symbol (this->is_section_symbol_ is | |
1339 | // false), the local symbol index. For a local section symbol | |
1340 | // (this->is_section_symbol_ is true), the section index in the | |
1341 | // input file. | |
c06b7b0b | 1342 | unsigned int local_sym_index_; |
a3ad94ed | 1343 | // The reloc type--a processor specific code. |
397b129b | 1344 | unsigned int type_ : 28; |
e8c846c3 ILT |
1345 | // True if the relocation is a RELATIVE relocation. |
1346 | bool is_relative_ : 1; | |
0da6fa6c DM |
1347 | // True if the relocation is one which should not use |
1348 | // a symbol, but which obtains its addend from a symbol. | |
1349 | bool is_symbolless_ : 1; | |
dceae3c1 ILT |
1350 | // True if the relocation is against a section symbol. |
1351 | bool is_section_symbol_ : 1; | |
13cf9988 | 1352 | // True if the addend should be the PLT offset. |
397b129b CC |
1353 | // (Used only for RELA, but stored here for space.) |
1354 | bool use_plt_offset_ : 1; | |
5a6f7e2d ILT |
1355 | // If the reloc address is an input section in an object, the |
1356 | // section index. This is INVALID_CODE if the reloc address is | |
1357 | // specified in some other way. | |
1358 | unsigned int shndx_; | |
c06b7b0b ILT |
1359 | }; |
1360 | ||
1361 | // The SHT_RELA version of Output_reloc<>. This is just derived from | |
1362 | // the SHT_REL version of Output_reloc, but it adds an addend. | |
1363 | ||
1364 | template<bool dynamic, int size, bool big_endian> | |
1365 | class Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
1366 | { | |
1367 | public: | |
1368 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1369 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend; | |
1370 | ||
1371 | // An uninitialized entry. | |
1372 | Output_reloc() | |
1373 | : rel_() | |
1374 | { } | |
1375 | ||
1376 | // A reloc against a global symbol. | |
5a6f7e2d | 1377 | |
a3ad94ed | 1378 | Output_reloc(Symbol* gsym, unsigned int type, Output_data* od, |
0da6fa6c | 1379 | Address address, Addend addend, bool is_relative, |
13cf9988 DM |
1380 | bool is_symbolless, bool use_plt_offset) |
1381 | : rel_(gsym, type, od, address, is_relative, is_symbolless, | |
1382 | use_plt_offset), | |
0da6fa6c | 1383 | addend_(addend) |
c06b7b0b ILT |
1384 | { } |
1385 | ||
ef9beddf | 1386 | Output_reloc(Symbol* gsym, unsigned int type, |
34171bc5 | 1387 | Sized_relobj<size, big_endian>* relobj, |
2ea97941 | 1388 | unsigned int shndx, Address address, Addend addend, |
13cf9988 | 1389 | bool is_relative, bool is_symbolless, bool use_plt_offset) |
0da6fa6c | 1390 | : rel_(gsym, type, relobj, shndx, address, is_relative, |
13cf9988 | 1391 | is_symbolless, use_plt_offset), addend_(addend) |
5a6f7e2d ILT |
1392 | { } |
1393 | ||
c06b7b0b | 1394 | // A reloc against a local symbol. |
5a6f7e2d ILT |
1395 | |
1396 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
e8c846c3 | 1397 | unsigned int local_sym_index, unsigned int type, |
2ea97941 | 1398 | Output_data* od, Address address, |
0da6fa6c | 1399 | Addend addend, bool is_relative, |
397b129b CC |
1400 | bool is_symbolless, bool is_section_symbol, |
1401 | bool use_plt_offset) | |
2ea97941 | 1402 | : rel_(relobj, local_sym_index, type, od, address, is_relative, |
34171bc5 | 1403 | is_symbolless, is_section_symbol, use_plt_offset), |
e8c846c3 | 1404 | addend_(addend) |
5a6f7e2d ILT |
1405 | { } |
1406 | ||
1407 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
e8c846c3 | 1408 | unsigned int local_sym_index, unsigned int type, |
2ea97941 | 1409 | unsigned int shndx, Address address, |
0da6fa6c | 1410 | Addend addend, bool is_relative, |
397b129b CC |
1411 | bool is_symbolless, bool is_section_symbol, |
1412 | bool use_plt_offset) | |
2ea97941 | 1413 | : rel_(relobj, local_sym_index, type, shndx, address, is_relative, |
34171bc5 | 1414 | is_symbolless, is_section_symbol, use_plt_offset), |
5a6f7e2d | 1415 | addend_(addend) |
c06b7b0b ILT |
1416 | { } |
1417 | ||
1418 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 1419 | |
a3ad94ed | 1420 | Output_reloc(Output_section* os, unsigned int type, Output_data* od, |
703d02da AM |
1421 | Address address, Addend addend, bool is_relative) |
1422 | : rel_(os, type, od, address, is_relative), addend_(addend) | |
c06b7b0b ILT |
1423 | { } |
1424 | ||
ef9beddf | 1425 | Output_reloc(Output_section* os, unsigned int type, |
34171bc5 | 1426 | Sized_relobj<size, big_endian>* relobj, |
703d02da AM |
1427 | unsigned int shndx, Address address, Addend addend, |
1428 | bool is_relative) | |
1429 | : rel_(os, type, relobj, shndx, address, is_relative), addend_(addend) | |
5a6f7e2d ILT |
1430 | { } |
1431 | ||
ec661b9d | 1432 | // An absolute or relative relocation with no symbol. |
e291e7b9 ILT |
1433 | |
1434 | Output_reloc(unsigned int type, Output_data* od, Address address, | |
ec661b9d AM |
1435 | Addend addend, bool is_relative) |
1436 | : rel_(type, od, address, is_relative), addend_(addend) | |
e291e7b9 ILT |
1437 | { } |
1438 | ||
1439 | Output_reloc(unsigned int type, Sized_relobj<size, big_endian>* relobj, | |
ec661b9d AM |
1440 | unsigned int shndx, Address address, Addend addend, |
1441 | bool is_relative) | |
1442 | : rel_(type, relobj, shndx, address, is_relative), addend_(addend) | |
e291e7b9 ILT |
1443 | { } |
1444 | ||
1445 | // A target specific relocation. The target will be called to get | |
1446 | // the symbol index and the addend, passing ARG. The type and | |
1447 | // offset will be set as for other relocation types. | |
1448 | ||
1449 | Output_reloc(unsigned int type, void* arg, Output_data* od, | |
1450 | Address address, Addend addend) | |
1451 | : rel_(type, arg, od, address), addend_(addend) | |
1452 | { } | |
1453 | ||
1454 | Output_reloc(unsigned int type, void* arg, | |
1455 | Sized_relobj<size, big_endian>* relobj, | |
1456 | unsigned int shndx, Address address, Addend addend) | |
1457 | : rel_(type, arg, relobj, shndx, address), addend_(addend) | |
1458 | { } | |
1459 | ||
1460 | // Return whether this is a RELATIVE relocation. | |
3a44184e ILT |
1461 | bool |
1462 | is_relative() const | |
1463 | { return this->rel_.is_relative(); } | |
1464 | ||
0da6fa6c DM |
1465 | // Return whether this is a relocation which should not use |
1466 | // a symbol, but which obtains its addend from a symbol. | |
1467 | bool | |
1468 | is_symbolless() const | |
1469 | { return this->rel_.is_symbolless(); } | |
1470 | ||
6fa2a40b CC |
1471 | // If this relocation is against an input section, return the |
1472 | // relocatable object containing the input section. | |
1473 | Sized_relobj<size, big_endian>* | |
1474 | get_relobj() const | |
1475 | { return this->rel_.get_relobj(); } | |
1476 | ||
c06b7b0b ILT |
1477 | // Write the reloc entry to an output view. |
1478 | void | |
1479 | write(unsigned char* pov) const; | |
1480 | ||
d98bc257 ILT |
1481 | // Return whether this reloc should be sorted before the argument |
1482 | // when sorting dynamic relocs. | |
1483 | bool | |
1484 | sort_before(const Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>& | |
1485 | r2) const | |
1486 | { | |
1487 | int i = this->rel_.compare(r2.rel_); | |
1488 | if (i < 0) | |
d98bc257 | 1489 | return true; |
cc28ec61 ILT |
1490 | else if (i > 0) |
1491 | return false; | |
d98bc257 ILT |
1492 | else |
1493 | return this->addend_ < r2.addend_; | |
1494 | } | |
1495 | ||
c06b7b0b ILT |
1496 | private: |
1497 | // The basic reloc. | |
1498 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> rel_; | |
1499 | // The addend. | |
1500 | Addend addend_; | |
1501 | }; | |
1502 | ||
3a44184e ILT |
1503 | // Output_data_reloc_generic is a non-template base class for |
1504 | // Output_data_reloc_base. This gives the generic code a way to hold | |
1505 | // a pointer to a reloc section. | |
1506 | ||
1507 | class Output_data_reloc_generic : public Output_section_data_build | |
1508 | { | |
1509 | public: | |
1510 | Output_data_reloc_generic(int size, bool sort_relocs) | |
1511 | : Output_section_data_build(Output_data::default_alignment_for_size(size)), | |
1512 | relative_reloc_count_(0), sort_relocs_(sort_relocs) | |
1513 | { } | |
1514 | ||
1515 | // Return the number of relative relocs in this section. | |
1516 | size_t | |
1517 | relative_reloc_count() const | |
1518 | { return this->relative_reloc_count_; } | |
1519 | ||
1520 | // Whether we should sort the relocs. | |
1521 | bool | |
1522 | sort_relocs() const | |
1523 | { return this->sort_relocs_; } | |
1524 | ||
83896202 ILT |
1525 | // Add a reloc of type TYPE against the global symbol GSYM. The |
1526 | // relocation applies to the data at offset ADDRESS within OD. | |
1527 | virtual void | |
1528 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, | |
1529 | uint64_t address, uint64_t addend) = 0; | |
1530 | ||
1531 | // Add a reloc of type TYPE against the global symbol GSYM. The | |
1532 | // relocation applies to data at offset ADDRESS within section SHNDX | |
1533 | // of object file RELOBJ. OD is the associated output section. | |
1534 | virtual void | |
1535 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, | |
1536 | Relobj* relobj, unsigned int shndx, uint64_t address, | |
1537 | uint64_t addend) = 0; | |
1538 | ||
1539 | // Add a reloc of type TYPE against the local symbol LOCAL_SYM_INDEX | |
1540 | // in RELOBJ. The relocation applies to the data at offset ADDRESS | |
1541 | // within OD. | |
1542 | virtual void | |
1543 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1544 | unsigned int type, Output_data* od, uint64_t address, | |
1545 | uint64_t addend) = 0; | |
1546 | ||
1547 | // Add a reloc of type TYPE against the local symbol LOCAL_SYM_INDEX | |
1548 | // in RELOBJ. The relocation applies to the data at offset ADDRESS | |
1549 | // within section SHNDX of RELOBJ. OD is the associated output | |
1550 | // section. | |
1551 | virtual void | |
1552 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1553 | unsigned int type, Output_data* od, unsigned int shndx, | |
1554 | uint64_t address, uint64_t addend) = 0; | |
1555 | ||
1556 | // Add a reloc of type TYPE against the STT_SECTION symbol of the | |
1557 | // output section OS. The relocation applies to the data at offset | |
1558 | // ADDRESS within OD. | |
1559 | virtual void | |
1560 | add_output_section_generic(Output_section *os, unsigned int type, | |
1561 | Output_data* od, uint64_t address, | |
1562 | uint64_t addend) = 0; | |
1563 | ||
1564 | // Add a reloc of type TYPE against the STT_SECTION symbol of the | |
1565 | // output section OS. The relocation applies to the data at offset | |
1566 | // ADDRESS within section SHNDX of RELOBJ. OD is the associated | |
1567 | // output section. | |
1568 | virtual void | |
1569 | add_output_section_generic(Output_section* os, unsigned int type, | |
1570 | Output_data* od, Relobj* relobj, | |
1571 | unsigned int shndx, uint64_t address, | |
1572 | uint64_t addend) = 0; | |
1573 | ||
3a44184e ILT |
1574 | protected: |
1575 | // Note that we've added another relative reloc. | |
1576 | void | |
1577 | bump_relative_reloc_count() | |
1578 | { ++this->relative_reloc_count_; } | |
1579 | ||
1580 | private: | |
1581 | // The number of relative relocs added to this section. This is to | |
1582 | // support DT_RELCOUNT. | |
1583 | size_t relative_reloc_count_; | |
1584 | // Whether to sort the relocations when writing them out, to make | |
1585 | // the dynamic linker more efficient. | |
1586 | bool sort_relocs_; | |
1587 | }; | |
1588 | ||
c06b7b0b ILT |
1589 | // Output_data_reloc is used to manage a section containing relocs. |
1590 | // SH_TYPE is either elfcpp::SHT_REL or elfcpp::SHT_RELA. DYNAMIC | |
1591 | // indicates whether this is a dynamic relocation or a normal | |
1592 | // relocation. Output_data_reloc_base is a base class. | |
1593 | // Output_data_reloc is the real class, which we specialize based on | |
1594 | // the reloc type. | |
1595 | ||
1596 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
3a44184e | 1597 | class Output_data_reloc_base : public Output_data_reloc_generic |
c06b7b0b ILT |
1598 | { |
1599 | public: | |
1600 | typedef Output_reloc<sh_type, dynamic, size, big_endian> Output_reloc_type; | |
1601 | typedef typename Output_reloc_type::Address Address; | |
1602 | static const int reloc_size = | |
1603 | Reloc_types<sh_type, size, big_endian>::reloc_size; | |
1604 | ||
1605 | // Construct the section. | |
d98bc257 | 1606 | Output_data_reloc_base(bool sort_relocs) |
3a44184e | 1607 | : Output_data_reloc_generic(size, sort_relocs) |
c06b7b0b ILT |
1608 | { } |
1609 | ||
27bc2bce | 1610 | protected: |
c06b7b0b ILT |
1611 | // Write out the data. |
1612 | void | |
1613 | do_write(Output_file*); | |
1614 | ||
c32482d6 CC |
1615 | // Generic implementation of do_write, allowing a customized |
1616 | // class for writing the output relocation (e.g., for MIPS-64). | |
1617 | template<class Output_reloc_writer> | |
1618 | void | |
1619 | do_write_generic(Output_file* of) | |
1620 | { | |
1621 | const off_t off = this->offset(); | |
1622 | const off_t oview_size = this->data_size(); | |
1623 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
1624 | ||
1625 | if (this->sort_relocs()) | |
1626 | { | |
1627 | gold_assert(dynamic); | |
1628 | std::sort(this->relocs_.begin(), this->relocs_.end(), | |
1629 | Sort_relocs_comparison()); | |
1630 | } | |
1631 | ||
1632 | unsigned char* pov = oview; | |
1633 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
1634 | p != this->relocs_.end(); | |
1635 | ++p) | |
1636 | { | |
1637 | Output_reloc_writer::write(p, pov); | |
1638 | pov += reloc_size; | |
1639 | } | |
1640 | ||
1641 | gold_assert(pov - oview == oview_size); | |
1642 | ||
1643 | of->write_output_view(off, oview_size, oview); | |
1644 | ||
1645 | // We no longer need the relocation entries. | |
1646 | this->relocs_.clear(); | |
1647 | } | |
1648 | ||
16649710 ILT |
1649 | // Set the entry size and the link. |
1650 | void | |
ca09d69a | 1651 | do_adjust_output_section(Output_section* os); |
16649710 | 1652 | |
7d9e3d98 ILT |
1653 | // Write to a map file. |
1654 | void | |
1655 | do_print_to_mapfile(Mapfile* mapfile) const | |
1656 | { | |
1657 | mapfile->print_output_data(this, | |
1658 | (dynamic | |
1659 | ? _("** dynamic relocs") | |
1660 | : _("** relocs"))); | |
1661 | } | |
1662 | ||
c06b7b0b ILT |
1663 | // Add a relocation entry. |
1664 | void | |
ca09d69a | 1665 | add(Output_data* od, const Output_reloc_type& reloc) |
c06b7b0b ILT |
1666 | { |
1667 | this->relocs_.push_back(reloc); | |
27bc2bce | 1668 | this->set_current_data_size(this->relocs_.size() * reloc_size); |
8b8dd8d5 ILT |
1669 | if (dynamic) |
1670 | od->add_dynamic_reloc(); | |
3a44184e ILT |
1671 | if (reloc.is_relative()) |
1672 | this->bump_relative_reloc_count(); | |
6fa2a40b CC |
1673 | Sized_relobj<size, big_endian>* relobj = reloc.get_relobj(); |
1674 | if (relobj != NULL) | |
1675 | relobj->add_dyn_reloc(this->relocs_.size() - 1); | |
c06b7b0b ILT |
1676 | } |
1677 | ||
1678 | private: | |
1679 | typedef std::vector<Output_reloc_type> Relocs; | |
1680 | ||
d98bc257 ILT |
1681 | // The class used to sort the relocations. |
1682 | struct Sort_relocs_comparison | |
1683 | { | |
1684 | bool | |
1685 | operator()(const Output_reloc_type& r1, const Output_reloc_type& r2) const | |
1686 | { return r1.sort_before(r2); } | |
1687 | }; | |
1688 | ||
1689 | // The relocations in this section. | |
c06b7b0b ILT |
1690 | Relocs relocs_; |
1691 | }; | |
1692 | ||
1693 | // The class which callers actually create. | |
1694 | ||
1695 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
1696 | class Output_data_reloc; | |
1697 | ||
1698 | // The SHT_REL version of Output_data_reloc. | |
1699 | ||
1700 | template<bool dynamic, int size, bool big_endian> | |
1701 | class Output_data_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> | |
1702 | : public Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian> | |
1703 | { | |
dceae3c1 | 1704 | private: |
c06b7b0b ILT |
1705 | typedef Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, |
1706 | big_endian> Base; | |
1707 | ||
1708 | public: | |
1709 | typedef typename Base::Output_reloc_type Output_reloc_type; | |
1710 | typedef typename Output_reloc_type::Address Address; | |
1711 | ||
d98bc257 ILT |
1712 | Output_data_reloc(bool sr) |
1713 | : Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian>(sr) | |
c06b7b0b ILT |
1714 | { } |
1715 | ||
1716 | // Add a reloc against a global symbol. | |
5a6f7e2d | 1717 | |
c06b7b0b | 1718 | void |
2ea97941 | 1719 | add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address) |
34171bc5 AM |
1720 | { |
1721 | this->add(od, Output_reloc_type(gsym, type, od, address, | |
1722 | false, false, false)); | |
1723 | } | |
c06b7b0b | 1724 | |
5a6f7e2d | 1725 | void |
ef9beddf | 1726 | add_global(Symbol* gsym, unsigned int type, Output_data* od, |
34171bc5 | 1727 | Sized_relobj<size, big_endian>* relobj, |
2ea97941 | 1728 | unsigned int shndx, Address address) |
34171bc5 AM |
1729 | { |
1730 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
1731 | false, false, false)); | |
1732 | } | |
e8c846c3 | 1733 | |
12c0daef | 1734 | void |
83896202 ILT |
1735 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, |
1736 | uint64_t address, uint64_t addend) | |
12c0daef ILT |
1737 | { |
1738 | gold_assert(addend == 0); | |
83896202 ILT |
1739 | this->add(od, Output_reloc_type(gsym, type, od, |
1740 | convert_types<Address, uint64_t>(address), | |
13cf9988 | 1741 | false, false, false)); |
12c0daef ILT |
1742 | } |
1743 | ||
1744 | void | |
83896202 ILT |
1745 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, |
1746 | Relobj* relobj, unsigned int shndx, uint64_t address, | |
1747 | uint64_t addend) | |
12c0daef ILT |
1748 | { |
1749 | gold_assert(addend == 0); | |
83896202 ILT |
1750 | Sized_relobj<size, big_endian>* sized_relobj = |
1751 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
1752 | this->add(od, Output_reloc_type(gsym, type, sized_relobj, shndx, | |
1753 | convert_types<Address, uint64_t>(address), | |
13cf9988 | 1754 | false, false, false)); |
12c0daef ILT |
1755 | } |
1756 | ||
e8c846c3 ILT |
1757 | // Add a RELATIVE reloc against a global symbol. The final relocation |
1758 | // will not reference the symbol. | |
1759 | ||
1760 | void | |
1761 | add_global_relative(Symbol* gsym, unsigned int type, Output_data* od, | |
34171bc5 AM |
1762 | Address address) |
1763 | { | |
1764 | this->add(od, Output_reloc_type(gsym, type, od, address, true, true, | |
1765 | false)); | |
1766 | } | |
e8c846c3 ILT |
1767 | |
1768 | void | |
1769 | add_global_relative(Symbol* gsym, unsigned int type, Output_data* od, | |
34171bc5 AM |
1770 | Sized_relobj<size, big_endian>* relobj, |
1771 | unsigned int shndx, Address address) | |
dceae3c1 | 1772 | { |
2ea97941 | 1773 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, |
34171bc5 | 1774 | true, true, false)); |
0da6fa6c DM |
1775 | } |
1776 | ||
1777 | // Add a global relocation which does not use a symbol for the relocation, | |
1778 | // but which gets its addend from a symbol. | |
1779 | ||
1780 | void | |
1781 | add_symbolless_global_addend(Symbol* gsym, unsigned int type, | |
1782 | Output_data* od, Address address) | |
34171bc5 AM |
1783 | { |
1784 | this->add(od, Output_reloc_type(gsym, type, od, address, false, true, | |
1785 | false)); | |
1786 | } | |
0da6fa6c DM |
1787 | |
1788 | void | |
1789 | add_symbolless_global_addend(Symbol* gsym, unsigned int type, | |
1790 | Output_data* od, | |
1791 | Sized_relobj<size, big_endian>* relobj, | |
1792 | unsigned int shndx, Address address) | |
1793 | { | |
1794 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
34171bc5 | 1795 | false, true, false)); |
dceae3c1 | 1796 | } |
5a6f7e2d | 1797 | |
c06b7b0b | 1798 | // Add a reloc against a local symbol. |
5a6f7e2d | 1799 | |
c06b7b0b | 1800 | void |
5a6f7e2d | 1801 | add_local(Sized_relobj<size, big_endian>* relobj, |
a3ad94ed | 1802 | unsigned int local_sym_index, unsigned int type, |
2ea97941 | 1803 | Output_data* od, Address address) |
dceae3c1 ILT |
1804 | { |
1805 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, | |
34171bc5 | 1806 | address, false, false, false, false)); |
dceae3c1 | 1807 | } |
5a6f7e2d ILT |
1808 | |
1809 | void | |
1810 | add_local(Sized_relobj<size, big_endian>* relobj, | |
1811 | unsigned int local_sym_index, unsigned int type, | |
2ea97941 | 1812 | Output_data* od, unsigned int shndx, Address address) |
dceae3c1 ILT |
1813 | { |
1814 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
397b129b | 1815 | address, false, false, false, false)); |
dceae3c1 | 1816 | } |
e8c846c3 | 1817 | |
83896202 ILT |
1818 | void |
1819 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1820 | unsigned int type, Output_data* od, uint64_t address, | |
1821 | uint64_t addend) | |
1822 | { | |
1823 | gold_assert(addend == 0); | |
1824 | Sized_relobj<size, big_endian>* sized_relobj = | |
1825 | static_cast<Sized_relobj<size, big_endian> *>(relobj); | |
1826 | this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, od, | |
1827 | convert_types<Address, uint64_t>(address), | |
1828 | false, false, false, false)); | |
1829 | } | |
1830 | ||
1831 | void | |
1832 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1833 | unsigned int type, Output_data* od, unsigned int shndx, | |
1834 | uint64_t address, uint64_t addend) | |
1835 | { | |
1836 | gold_assert(addend == 0); | |
1837 | Sized_relobj<size, big_endian>* sized_relobj = | |
1838 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
1839 | this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, shndx, | |
1840 | convert_types<Address, uint64_t>(address), | |
1841 | false, false, false, false)); | |
1842 | } | |
1843 | ||
e8c846c3 | 1844 | // Add a RELATIVE reloc against a local symbol. |
5a6f7e2d | 1845 | |
e8c846c3 ILT |
1846 | void |
1847 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1848 | unsigned int local_sym_index, unsigned int type, |
1849 | Output_data* od, Address address) | |
dceae3c1 ILT |
1850 | { |
1851 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, | |
34171bc5 | 1852 | address, true, true, false, false)); |
dceae3c1 | 1853 | } |
e8c846c3 ILT |
1854 | |
1855 | void | |
1856 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1857 | unsigned int local_sym_index, unsigned int type, |
1858 | Output_data* od, unsigned int shndx, Address address) | |
dceae3c1 ILT |
1859 | { |
1860 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
397b129b | 1861 | address, true, true, false, false)); |
0da6fa6c DM |
1862 | } |
1863 | ||
fa89cc82 HS |
1864 | void |
1865 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
1866 | unsigned int local_sym_index, unsigned int type, | |
1867 | Output_data* od, unsigned int shndx, Address address, | |
1868 | bool use_plt_offset) | |
1869 | { | |
1870 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
1871 | address, true, true, false, | |
1872 | use_plt_offset)); | |
1873 | } | |
1874 | ||
0da6fa6c DM |
1875 | // Add a local relocation which does not use a symbol for the relocation, |
1876 | // but which gets its addend from a symbol. | |
1877 | ||
1878 | void | |
1879 | add_symbolless_local_addend(Sized_relobj<size, big_endian>* relobj, | |
1880 | unsigned int local_sym_index, unsigned int type, | |
1881 | Output_data* od, Address address) | |
1882 | { | |
1883 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, | |
34171bc5 | 1884 | address, false, true, false, false)); |
0da6fa6c DM |
1885 | } |
1886 | ||
1887 | void | |
1888 | add_symbolless_local_addend(Sized_relobj<size, big_endian>* relobj, | |
1889 | unsigned int local_sym_index, unsigned int type, | |
1890 | Output_data* od, unsigned int shndx, | |
1891 | Address address) | |
1892 | { | |
1893 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
397b129b | 1894 | address, false, true, false, false)); |
dceae3c1 ILT |
1895 | } |
1896 | ||
1897 | // Add a reloc against a local section symbol. This will be | |
1898 | // converted into a reloc against the STT_SECTION symbol of the | |
1899 | // output section. | |
1900 | ||
1901 | void | |
1902 | add_local_section(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1903 | unsigned int input_shndx, unsigned int type, |
1904 | Output_data* od, Address address) | |
dceae3c1 ILT |
1905 | { |
1906 | this->add(od, Output_reloc_type(relobj, input_shndx, type, od, | |
34171bc5 | 1907 | address, false, false, true, false)); |
dceae3c1 ILT |
1908 | } |
1909 | ||
1910 | void | |
1911 | add_local_section(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1912 | unsigned int input_shndx, unsigned int type, |
1913 | Output_data* od, unsigned int shndx, Address address) | |
dceae3c1 ILT |
1914 | { |
1915 | this->add(od, Output_reloc_type(relobj, input_shndx, type, shndx, | |
34171bc5 | 1916 | address, false, false, true, false)); |
dceae3c1 | 1917 | } |
c06b7b0b ILT |
1918 | |
1919 | // A reloc against the STT_SECTION symbol of an output section. | |
4f4c5f80 ILT |
1920 | // OS is the Output_section that the relocation refers to; OD is |
1921 | // the Output_data object being relocated. | |
5a6f7e2d | 1922 | |
c06b7b0b | 1923 | void |
a3ad94ed | 1924 | add_output_section(Output_section* os, unsigned int type, |
2ea97941 | 1925 | Output_data* od, Address address) |
703d02da | 1926 | { this->add(od, Output_reloc_type(os, type, od, address, false)); } |
5a6f7e2d ILT |
1927 | |
1928 | void | |
4f4c5f80 | 1929 | add_output_section(Output_section* os, unsigned int type, Output_data* od, |
ef9beddf | 1930 | Sized_relobj<size, big_endian>* relobj, |
34171bc5 | 1931 | unsigned int shndx, Address address) |
703d02da | 1932 | { this->add(od, Output_reloc_type(os, type, relobj, shndx, address, false)); } |
e291e7b9 | 1933 | |
83896202 ILT |
1934 | void |
1935 | add_output_section_generic(Output_section* os, unsigned int type, | |
1936 | Output_data* od, uint64_t address, | |
1937 | uint64_t addend) | |
1938 | { | |
1939 | gold_assert(addend == 0); | |
1940 | this->add(od, Output_reloc_type(os, type, od, | |
703d02da AM |
1941 | convert_types<Address, uint64_t>(address), |
1942 | false)); | |
83896202 ILT |
1943 | } |
1944 | ||
1945 | void | |
1946 | add_output_section_generic(Output_section* os, unsigned int type, | |
1947 | Output_data* od, Relobj* relobj, | |
1948 | unsigned int shndx, uint64_t address, | |
1949 | uint64_t addend) | |
1950 | { | |
1951 | gold_assert(addend == 0); | |
1952 | Sized_relobj<size, big_endian>* sized_relobj = | |
1953 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
1954 | this->add(od, Output_reloc_type(os, type, sized_relobj, shndx, | |
703d02da AM |
1955 | convert_types<Address, uint64_t>(address), |
1956 | false)); | |
83896202 ILT |
1957 | } |
1958 | ||
703d02da AM |
1959 | // As above, but the reloc TYPE is relative |
1960 | ||
1961 | void | |
1962 | add_output_section_relative(Output_section* os, unsigned int type, | |
1963 | Output_data* od, Address address) | |
1964 | { this->add(od, Output_reloc_type(os, type, od, address, true)); } | |
1965 | ||
1966 | void | |
1967 | add_output_section_relative(Output_section* os, unsigned int type, | |
1968 | Output_data* od, | |
1969 | Sized_relobj<size, big_endian>* relobj, | |
1970 | unsigned int shndx, Address address) | |
1971 | { this->add(od, Output_reloc_type(os, type, relobj, shndx, address, true)); } | |
1972 | ||
e291e7b9 ILT |
1973 | // Add an absolute relocation. |
1974 | ||
1975 | void | |
1976 | add_absolute(unsigned int type, Output_data* od, Address address) | |
ec661b9d | 1977 | { this->add(od, Output_reloc_type(type, od, address, false)); } |
e291e7b9 ILT |
1978 | |
1979 | void | |
1980 | add_absolute(unsigned int type, Output_data* od, | |
1981 | Sized_relobj<size, big_endian>* relobj, | |
1982 | unsigned int shndx, Address address) | |
ec661b9d AM |
1983 | { this->add(od, Output_reloc_type(type, relobj, shndx, address, false)); } |
1984 | ||
1985 | // Add a relative relocation | |
1986 | ||
1987 | void | |
1988 | add_relative(unsigned int type, Output_data* od, Address address) | |
1989 | { this->add(od, Output_reloc_type(type, od, address, true)); } | |
1990 | ||
1991 | void | |
1992 | add_relative(unsigned int type, Output_data* od, | |
1993 | Sized_relobj<size, big_endian>* relobj, | |
1994 | unsigned int shndx, Address address) | |
1995 | { this->add(od, Output_reloc_type(type, relobj, shndx, address, true)); } | |
e291e7b9 ILT |
1996 | |
1997 | // Add a target specific relocation. A target which calls this must | |
1998 | // define the reloc_symbol_index and reloc_addend virtual functions. | |
1999 | ||
2000 | void | |
2001 | add_target_specific(unsigned int type, void* arg, Output_data* od, | |
2002 | Address address) | |
2003 | { this->add(od, Output_reloc_type(type, arg, od, address)); } | |
2004 | ||
2005 | void | |
2006 | add_target_specific(unsigned int type, void* arg, Output_data* od, | |
2007 | Sized_relobj<size, big_endian>* relobj, | |
2008 | unsigned int shndx, Address address) | |
2009 | { this->add(od, Output_reloc_type(type, arg, relobj, shndx, address)); } | |
c06b7b0b ILT |
2010 | }; |
2011 | ||
2012 | // The SHT_RELA version of Output_data_reloc. | |
2013 | ||
2014 | template<bool dynamic, int size, bool big_endian> | |
2015 | class Output_data_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
2016 | : public Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
2017 | { | |
dceae3c1 | 2018 | private: |
c06b7b0b ILT |
2019 | typedef Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, |
2020 | big_endian> Base; | |
2021 | ||
2022 | public: | |
2023 | typedef typename Base::Output_reloc_type Output_reloc_type; | |
2024 | typedef typename Output_reloc_type::Address Address; | |
2025 | typedef typename Output_reloc_type::Addend Addend; | |
2026 | ||
d98bc257 ILT |
2027 | Output_data_reloc(bool sr) |
2028 | : Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian>(sr) | |
c06b7b0b ILT |
2029 | { } |
2030 | ||
2031 | // Add a reloc against a global symbol. | |
5a6f7e2d | 2032 | |
c06b7b0b | 2033 | void |
a3ad94ed | 2034 | add_global(Symbol* gsym, unsigned int type, Output_data* od, |
2ea97941 | 2035 | Address address, Addend addend) |
34171bc5 AM |
2036 | { |
2037 | this->add(od, Output_reloc_type(gsym, type, od, address, addend, | |
2038 | false, false, false)); | |
2039 | } | |
c06b7b0b | 2040 | |
5a6f7e2d | 2041 | void |
ef9beddf | 2042 | add_global(Symbol* gsym, unsigned int type, Output_data* od, |
34171bc5 | 2043 | Sized_relobj<size, big_endian>* relobj, |
2ea97941 | 2044 | unsigned int shndx, Address address, |
4f4c5f80 | 2045 | Addend addend) |
34171bc5 AM |
2046 | { |
2047 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
2048 | addend, false, false, false)); | |
2049 | } | |
e8c846c3 | 2050 | |
83896202 ILT |
2051 | void |
2052 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, | |
2053 | uint64_t address, uint64_t addend) | |
2054 | { | |
2055 | this->add(od, Output_reloc_type(gsym, type, od, | |
2056 | convert_types<Address, uint64_t>(address), | |
2057 | convert_types<Addend, uint64_t>(addend), | |
13cf9988 | 2058 | false, false, false)); |
83896202 ILT |
2059 | } |
2060 | ||
2061 | void | |
2062 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, | |
2063 | Relobj* relobj, unsigned int shndx, uint64_t address, | |
2064 | uint64_t addend) | |
2065 | { | |
2066 | Sized_relobj<size, big_endian>* sized_relobj = | |
2067 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
2068 | this->add(od, Output_reloc_type(gsym, type, sized_relobj, shndx, | |
2069 | convert_types<Address, uint64_t>(address), | |
2070 | convert_types<Addend, uint64_t>(addend), | |
13cf9988 | 2071 | false, false, false)); |
83896202 ILT |
2072 | } |
2073 | ||
e8c846c3 ILT |
2074 | // Add a RELATIVE reloc against a global symbol. The final output |
2075 | // relocation will not reference the symbol, but we must keep the symbol | |
2076 | // information long enough to set the addend of the relocation correctly | |
2077 | // when it is written. | |
2078 | ||
2079 | void | |
2080 | add_global_relative(Symbol* gsym, unsigned int type, Output_data* od, | |
34171bc5 AM |
2081 | Address address, Addend addend, bool use_plt_offset) |
2082 | { | |
2083 | this->add(od, Output_reloc_type(gsym, type, od, address, addend, true, | |
2084 | true, use_plt_offset)); | |
2085 | } | |
e8c846c3 ILT |
2086 | |
2087 | void | |
2088 | add_global_relative(Symbol* gsym, unsigned int type, Output_data* od, | |
34171bc5 AM |
2089 | Sized_relobj<size, big_endian>* relobj, |
2090 | unsigned int shndx, Address address, Addend addend, | |
13cf9988 | 2091 | bool use_plt_offset) |
34171bc5 AM |
2092 | { |
2093 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
2094 | addend, true, true, use_plt_offset)); | |
2095 | } | |
0da6fa6c DM |
2096 | |
2097 | // Add a global relocation which does not use a symbol for the relocation, | |
2098 | // but which gets its addend from a symbol. | |
2099 | ||
2100 | void | |
2101 | add_symbolless_global_addend(Symbol* gsym, unsigned int type, Output_data* od, | |
2102 | Address address, Addend addend) | |
34171bc5 AM |
2103 | { |
2104 | this->add(od, Output_reloc_type(gsym, type, od, address, addend, | |
2105 | false, true, false)); | |
2106 | } | |
0da6fa6c DM |
2107 | |
2108 | void | |
2109 | add_symbolless_global_addend(Symbol* gsym, unsigned int type, | |
2110 | Output_data* od, | |
2111 | Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
2112 | unsigned int shndx, Address address, |
2113 | Addend addend) | |
2114 | { | |
2115 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
2116 | addend, false, true, false)); | |
2117 | } | |
5a6f7e2d | 2118 | |
c06b7b0b | 2119 | // Add a reloc against a local symbol. |
5a6f7e2d | 2120 | |
c06b7b0b | 2121 | void |
5a6f7e2d | 2122 | add_local(Sized_relobj<size, big_endian>* relobj, |
c06b7b0b | 2123 | unsigned int local_sym_index, unsigned int type, |
2ea97941 | 2124 | Output_data* od, Address address, Addend addend) |
c06b7b0b | 2125 | { |
2ea97941 | 2126 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address, |
397b129b | 2127 | addend, false, false, false, false)); |
5a6f7e2d ILT |
2128 | } |
2129 | ||
2130 | void | |
2131 | add_local(Sized_relobj<size, big_endian>* relobj, | |
2132 | unsigned int local_sym_index, unsigned int type, | |
2ea97941 | 2133 | Output_data* od, unsigned int shndx, Address address, |
4f4c5f80 | 2134 | Addend addend) |
5a6f7e2d | 2135 | { |
4f4c5f80 | 2136 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, |
34171bc5 AM |
2137 | address, addend, false, false, false, |
2138 | false)); | |
e8c846c3 ILT |
2139 | } |
2140 | ||
83896202 ILT |
2141 | void |
2142 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
2143 | unsigned int type, Output_data* od, uint64_t address, | |
2144 | uint64_t addend) | |
2145 | { | |
2146 | Sized_relobj<size, big_endian>* sized_relobj = | |
2147 | static_cast<Sized_relobj<size, big_endian> *>(relobj); | |
2148 | this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, od, | |
2149 | convert_types<Address, uint64_t>(address), | |
2150 | convert_types<Addend, uint64_t>(addend), | |
2151 | false, false, false, false)); | |
2152 | } | |
2153 | ||
2154 | void | |
2155 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
2156 | unsigned int type, Output_data* od, unsigned int shndx, | |
2157 | uint64_t address, uint64_t addend) | |
2158 | { | |
2159 | Sized_relobj<size, big_endian>* sized_relobj = | |
2160 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
2161 | this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, shndx, | |
2162 | convert_types<Address, uint64_t>(address), | |
2163 | convert_types<Addend, uint64_t>(addend), | |
2164 | false, false, false, false)); | |
2165 | } | |
2166 | ||
e8c846c3 ILT |
2167 | // Add a RELATIVE reloc against a local symbol. |
2168 | ||
2169 | void | |
2170 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
2171 | unsigned int local_sym_index, unsigned int type, |
2172 | Output_data* od, Address address, Addend addend, | |
2173 | bool use_plt_offset) | |
e8c846c3 | 2174 | { |
2ea97941 | 2175 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address, |
397b129b CC |
2176 | addend, true, true, false, |
2177 | use_plt_offset)); | |
e8c846c3 ILT |
2178 | } |
2179 | ||
2180 | void | |
2181 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
2182 | unsigned int local_sym_index, unsigned int type, |
2183 | Output_data* od, unsigned int shndx, Address address, | |
2184 | Addend addend, bool use_plt_offset) | |
e8c846c3 ILT |
2185 | { |
2186 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
34171bc5 AM |
2187 | address, addend, true, true, false, |
2188 | use_plt_offset)); | |
0da6fa6c DM |
2189 | } |
2190 | ||
2191 | // Add a local relocation which does not use a symbol for the relocation, | |
2192 | // but which gets it's addend from a symbol. | |
2193 | ||
2194 | void | |
2195 | add_symbolless_local_addend(Sized_relobj<size, big_endian>* relobj, | |
2196 | unsigned int local_sym_index, unsigned int type, | |
2197 | Output_data* od, Address address, Addend addend) | |
2198 | { | |
2199 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address, | |
397b129b | 2200 | addend, false, true, false, false)); |
0da6fa6c DM |
2201 | } |
2202 | ||
2203 | void | |
2204 | add_symbolless_local_addend(Sized_relobj<size, big_endian>* relobj, | |
2205 | unsigned int local_sym_index, unsigned int type, | |
2206 | Output_data* od, unsigned int shndx, | |
2207 | Address address, Addend addend) | |
2208 | { | |
2209 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
34171bc5 AM |
2210 | address, addend, false, true, false, |
2211 | false)); | |
dceae3c1 ILT |
2212 | } |
2213 | ||
2214 | // Add a reloc against a local section symbol. This will be | |
2215 | // converted into a reloc against the STT_SECTION symbol of the | |
2216 | // output section. | |
2217 | ||
2218 | void | |
2219 | add_local_section(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
2220 | unsigned int input_shndx, unsigned int type, |
2221 | Output_data* od, Address address, Addend addend) | |
dceae3c1 | 2222 | { |
2ea97941 | 2223 | this->add(od, Output_reloc_type(relobj, input_shndx, type, od, address, |
397b129b | 2224 | addend, false, false, true, false)); |
dceae3c1 ILT |
2225 | } |
2226 | ||
2227 | void | |
2228 | add_local_section(Sized_relobj<size, big_endian>* relobj, | |
6fa2a40b CC |
2229 | unsigned int input_shndx, unsigned int type, |
2230 | Output_data* od, unsigned int shndx, Address address, | |
2231 | Addend addend) | |
dceae3c1 ILT |
2232 | { |
2233 | this->add(od, Output_reloc_type(relobj, input_shndx, type, shndx, | |
34171bc5 AM |
2234 | address, addend, false, false, true, |
2235 | false)); | |
c06b7b0b ILT |
2236 | } |
2237 | ||
2238 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 2239 | |
c06b7b0b | 2240 | void |
a3ad94ed | 2241 | add_output_section(Output_section* os, unsigned int type, Output_data* od, |
2ea97941 | 2242 | Address address, Addend addend) |
703d02da | 2243 | { this->add(od, Output_reloc_type(os, type, od, address, addend, false)); } |
5a6f7e2d ILT |
2244 | |
2245 | void | |
829c9745 | 2246 | add_output_section(Output_section* os, unsigned int type, Output_data* od, |
34171bc5 | 2247 | Sized_relobj<size, big_endian>* relobj, |
2ea97941 | 2248 | unsigned int shndx, Address address, Addend addend) |
34171bc5 AM |
2249 | { |
2250 | this->add(od, Output_reloc_type(os, type, relobj, shndx, address, | |
2251 | addend, false)); | |
2252 | } | |
e291e7b9 | 2253 | |
83896202 ILT |
2254 | void |
2255 | add_output_section_generic(Output_section* os, unsigned int type, | |
2256 | Output_data* od, uint64_t address, | |
2257 | uint64_t addend) | |
2258 | { | |
2259 | this->add(od, Output_reloc_type(os, type, od, | |
2260 | convert_types<Address, uint64_t>(address), | |
703d02da AM |
2261 | convert_types<Addend, uint64_t>(addend), |
2262 | false)); | |
83896202 ILT |
2263 | } |
2264 | ||
2265 | void | |
2266 | add_output_section_generic(Output_section* os, unsigned int type, | |
2267 | Output_data* od, Relobj* relobj, | |
2268 | unsigned int shndx, uint64_t address, | |
2269 | uint64_t addend) | |
2270 | { | |
2271 | Sized_relobj<size, big_endian>* sized_relobj = | |
2272 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
2273 | this->add(od, Output_reloc_type(os, type, sized_relobj, shndx, | |
2274 | convert_types<Address, uint64_t>(address), | |
703d02da AM |
2275 | convert_types<Addend, uint64_t>(addend), |
2276 | false)); | |
2277 | } | |
2278 | ||
2279 | // As above, but the reloc TYPE is relative | |
2280 | ||
2281 | void | |
2282 | add_output_section_relative(Output_section* os, unsigned int type, | |
2283 | Output_data* od, Address address, Addend addend) | |
2284 | { this->add(od, Output_reloc_type(os, type, od, address, addend, true)); } | |
2285 | ||
2286 | void | |
2287 | add_output_section_relative(Output_section* os, unsigned int type, | |
2288 | Output_data* od, | |
2289 | Sized_relobj<size, big_endian>* relobj, | |
2290 | unsigned int shndx, Address address, | |
2291 | Addend addend) | |
2292 | { | |
2293 | this->add(od, Output_reloc_type(os, type, relobj, shndx, | |
2294 | address, addend, true)); | |
83896202 ILT |
2295 | } |
2296 | ||
e291e7b9 ILT |
2297 | // Add an absolute relocation. |
2298 | ||
2299 | void | |
2300 | add_absolute(unsigned int type, Output_data* od, Address address, | |
2301 | Addend addend) | |
ec661b9d | 2302 | { this->add(od, Output_reloc_type(type, od, address, addend, false)); } |
e291e7b9 ILT |
2303 | |
2304 | void | |
2305 | add_absolute(unsigned int type, Output_data* od, | |
2306 | Sized_relobj<size, big_endian>* relobj, | |
2307 | unsigned int shndx, Address address, Addend addend) | |
34171bc5 AM |
2308 | { |
2309 | this->add(od, Output_reloc_type(type, relobj, shndx, address, addend, | |
2310 | false)); | |
2311 | } | |
ec661b9d AM |
2312 | |
2313 | // Add a relative relocation | |
2314 | ||
2315 | void | |
2316 | add_relative(unsigned int type, Output_data* od, Address address, | |
2317 | Addend addend) | |
2318 | { this->add(od, Output_reloc_type(type, od, address, addend, true)); } | |
2319 | ||
2320 | void | |
2321 | add_relative(unsigned int type, Output_data* od, | |
2322 | Sized_relobj<size, big_endian>* relobj, | |
2323 | unsigned int shndx, Address address, Addend addend) | |
34171bc5 AM |
2324 | { |
2325 | this->add(od, Output_reloc_type(type, relobj, shndx, address, addend, | |
2326 | true)); | |
2327 | } | |
e291e7b9 ILT |
2328 | |
2329 | // Add a target specific relocation. A target which calls this must | |
2330 | // define the reloc_symbol_index and reloc_addend virtual functions. | |
2331 | ||
2332 | void | |
2333 | add_target_specific(unsigned int type, void* arg, Output_data* od, | |
2334 | Address address, Addend addend) | |
2335 | { this->add(od, Output_reloc_type(type, arg, od, address, addend)); } | |
2336 | ||
2337 | void | |
2338 | add_target_specific(unsigned int type, void* arg, Output_data* od, | |
2339 | Sized_relobj<size, big_endian>* relobj, | |
2340 | unsigned int shndx, Address address, Addend addend) | |
2341 | { | |
2342 | this->add(od, Output_reloc_type(type, arg, relobj, shndx, address, | |
2343 | addend)); | |
2344 | } | |
c06b7b0b ILT |
2345 | }; |
2346 | ||
6a74a719 ILT |
2347 | // Output_relocatable_relocs represents a relocation section in a |
2348 | // relocatable link. The actual data is written out in the target | |
7404fe1b | 2349 | // hook relocate_relocs. This just saves space for it. |
6a74a719 ILT |
2350 | |
2351 | template<int sh_type, int size, bool big_endian> | |
2352 | class Output_relocatable_relocs : public Output_section_data | |
2353 | { | |
2354 | public: | |
2355 | Output_relocatable_relocs(Relocatable_relocs* rr) | |
2356 | : Output_section_data(Output_data::default_alignment_for_size(size)), | |
2357 | rr_(rr) | |
2358 | { } | |
2359 | ||
2360 | void | |
2361 | set_final_data_size(); | |
2362 | ||
2363 | // Write out the data. There is nothing to do here. | |
2364 | void | |
2365 | do_write(Output_file*) | |
2366 | { } | |
2367 | ||
7d9e3d98 ILT |
2368 | // Write to a map file. |
2369 | void | |
2370 | do_print_to_mapfile(Mapfile* mapfile) const | |
2371 | { mapfile->print_output_data(this, _("** relocs")); } | |
2372 | ||
6a74a719 ILT |
2373 | private: |
2374 | // The relocs associated with this input section. | |
2375 | Relocatable_relocs* rr_; | |
2376 | }; | |
2377 | ||
2378 | // Handle a GROUP section. | |
2379 | ||
2380 | template<int size, bool big_endian> | |
2381 | class Output_data_group : public Output_section_data | |
2382 | { | |
2383 | public: | |
8825ac63 | 2384 | // The constructor clears *INPUT_SHNDXES. |
6fa2a40b | 2385 | Output_data_group(Sized_relobj_file<size, big_endian>* relobj, |
6a74a719 | 2386 | section_size_type entry_count, |
8825ac63 ILT |
2387 | elfcpp::Elf_Word flags, |
2388 | std::vector<unsigned int>* input_shndxes); | |
6a74a719 ILT |
2389 | |
2390 | void | |
2391 | do_write(Output_file*); | |
2392 | ||
7d9e3d98 ILT |
2393 | // Write to a map file. |
2394 | void | |
2395 | do_print_to_mapfile(Mapfile* mapfile) const | |
2396 | { mapfile->print_output_data(this, _("** group")); } | |
2397 | ||
20e6d0d6 DK |
2398 | // Set final data size. |
2399 | void | |
2400 | set_final_data_size() | |
2401 | { this->set_data_size((this->input_shndxes_.size() + 1) * 4); } | |
2402 | ||
6a74a719 ILT |
2403 | private: |
2404 | // The input object. | |
6fa2a40b | 2405 | Sized_relobj_file<size, big_endian>* relobj_; |
6a74a719 ILT |
2406 | // The group flag word. |
2407 | elfcpp::Elf_Word flags_; | |
2408 | // The section indexes of the input sections in this group. | |
8825ac63 | 2409 | std::vector<unsigned int> input_shndxes_; |
6a74a719 ILT |
2410 | }; |
2411 | ||
dbe717ef ILT |
2412 | // Output_data_got is used to manage a GOT. Each entry in the GOT is |
2413 | // for one symbol--either a global symbol or a local symbol in an | |
ead1e424 | 2414 | // object. The target specific code adds entries to the GOT as |
83896202 ILT |
2415 | // needed. The GOT_SIZE template parameter is the size in bits of a |
2416 | // GOT entry, typically 32 or 64. | |
ead1e424 | 2417 | |
dd74ae06 CC |
2418 | class Output_data_got_base : public Output_section_data_build |
2419 | { | |
2420 | public: | |
2421 | Output_data_got_base(uint64_t align) | |
2422 | : Output_section_data_build(align) | |
2423 | { } | |
2424 | ||
2425 | Output_data_got_base(off_t data_size, uint64_t align) | |
2426 | : Output_section_data_build(data_size, align) | |
2427 | { } | |
2428 | ||
2429 | // Reserve the slot at index I in the GOT. | |
2430 | void | |
2431 | reserve_slot(unsigned int i) | |
2432 | { this->do_reserve_slot(i); } | |
2433 | ||
2434 | protected: | |
2435 | // Reserve the slot at index I in the GOT. | |
2436 | virtual void | |
2437 | do_reserve_slot(unsigned int i) = 0; | |
2438 | }; | |
2439 | ||
83896202 | 2440 | template<int got_size, bool big_endian> |
dd74ae06 | 2441 | class Output_data_got : public Output_data_got_base |
ead1e424 ILT |
2442 | { |
2443 | public: | |
83896202 | 2444 | typedef typename elfcpp::Elf_types<got_size>::Elf_Addr Valtype; |
ead1e424 | 2445 | |
7e1edb90 | 2446 | Output_data_got() |
dd74ae06 | 2447 | : Output_data_got_base(Output_data::default_alignment_for_size(got_size)), |
4829d394 | 2448 | entries_(), free_list_() |
ead1e424 ILT |
2449 | { } |
2450 | ||
4829d394 | 2451 | Output_data_got(off_t data_size) |
dd74ae06 CC |
2452 | : Output_data_got_base(data_size, |
2453 | Output_data::default_alignment_for_size(got_size)), | |
4829d394 CC |
2454 | entries_(), free_list_() |
2455 | { | |
2456 | // For an incremental update, we have an existing GOT section. | |
2457 | // Initialize the list of entries and the free list. | |
83896202 | 2458 | this->entries_.resize(data_size / (got_size / 8)); |
4829d394 CC |
2459 | this->free_list_.init(data_size, false); |
2460 | } | |
2461 | ||
dbe717ef ILT |
2462 | // Add an entry for a global symbol to the GOT. Return true if this |
2463 | // is a new GOT entry, false if the symbol was already in the GOT. | |
2464 | bool | |
0a65a3a7 | 2465 | add_global(Symbol* gsym, unsigned int got_type); |
ead1e424 | 2466 | |
7223e9ca ILT |
2467 | // Like add_global, but use the PLT offset of the global symbol if |
2468 | // it has one. | |
2469 | bool | |
2470 | add_global_plt(Symbol* gsym, unsigned int got_type); | |
2471 | ||
bd73a62d | 2472 | // Like add_global, but for a TLS symbol where the value will be |
19fec8c1 | 2473 | // offset using Target::tls_offset_for_global. |
bd73a62d AM |
2474 | bool |
2475 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2476 | { return add_global_plt(gsym, got_type); } | |
2477 | ||
7bf1f802 ILT |
2478 | // Add an entry for a global symbol to the GOT, and add a dynamic |
2479 | // relocation of type R_TYPE for the GOT entry. | |
2480 | void | |
0a65a3a7 | 2481 | add_global_with_rel(Symbol* gsym, unsigned int got_type, |
34171bc5 | 2482 | Output_data_reloc_generic* rel_dyn, unsigned int r_type); |
0a65a3a7 CC |
2483 | |
2484 | // Add a pair of entries for a global symbol to the GOT, and add | |
2485 | // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively. | |
2486 | void | |
2487 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
34171bc5 | 2488 | Output_data_reloc_generic* rel_dyn, |
83896202 | 2489 | unsigned int r_type_1, unsigned int r_type_2); |
7bf1f802 | 2490 | |
e727fa71 ILT |
2491 | // Add an entry for a local symbol to the GOT. This returns true if |
2492 | // this is a new GOT entry, false if the symbol already has a GOT | |
2493 | // entry. | |
2494 | bool | |
83896202 | 2495 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type); |
ead1e424 | 2496 | |
7ef8ae7c VR |
2497 | // Add an entry for a local symbol plus ADDEND to the GOT. This returns |
2498 | // true if this is a new GOT entry, false if the symbol already has a GOT | |
2499 | // entry. | |
2500 | bool | |
2501 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type, | |
1130c90e | 2502 | uint64_t addend); |
7ef8ae7c | 2503 | |
7223e9ca ILT |
2504 | // Like add_local, but use the PLT offset of the local symbol if it |
2505 | // has one. | |
2506 | bool | |
83896202 | 2507 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type); |
7223e9ca | 2508 | |
bd73a62d | 2509 | // Like add_local, but for a TLS symbol where the value will be |
19fec8c1 | 2510 | // offset using Target::tls_offset_for_local. |
bd73a62d AM |
2511 | bool |
2512 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2513 | { return add_local_plt(object, sym_index, got_type); } | |
2514 | ||
0a65a3a7 | 2515 | // Add an entry for a local symbol to the GOT, and add a dynamic |
7bf1f802 ILT |
2516 | // relocation of type R_TYPE for the GOT entry. |
2517 | void | |
83896202 ILT |
2518 | add_local_with_rel(Relobj* object, unsigned int sym_index, |
2519 | unsigned int got_type, Output_data_reloc_generic* rel_dyn, | |
2520 | unsigned int r_type); | |
07f397ab | 2521 | |
7ef8ae7c VR |
2522 | // Add an entry for a local symbol plus ADDEND to the GOT, and add a dynamic |
2523 | // relocation of type R_TYPE for the GOT entry. | |
2524 | void | |
2525 | add_local_with_rel(Relobj* object, unsigned int sym_index, | |
2526 | unsigned int got_type, Output_data_reloc_generic* rel_dyn, | |
2527 | unsigned int r_type, uint64_t addend); | |
2528 | ||
0a65a3a7 | 2529 | // Add a pair of entries for a local symbol to the GOT, and add |
bd73a62d AM |
2530 | // a dynamic relocation of type R_TYPE using the section symbol of |
2531 | // the output section to which input section SHNDX maps, on the first. | |
2532 | // The first got entry will have a value of zero, the second the | |
2533 | // value of the local symbol. | |
7bf1f802 | 2534 | void |
83896202 ILT |
2535 | add_local_pair_with_rel(Relobj* object, unsigned int sym_index, |
2536 | unsigned int shndx, unsigned int got_type, | |
2537 | Output_data_reloc_generic* rel_dyn, | |
34171bc5 | 2538 | unsigned int r_type); |
bd73a62d | 2539 | |
7ef8ae7c VR |
2540 | // Add a pair of entries for a local symbol plus ADDEND to the GOT, and add |
2541 | // a dynamic relocation of type R_TYPE using the section symbol of | |
2542 | // the output section to which input section SHNDX maps, on the first. | |
2543 | // The first got entry will have a value of zero, the second the | |
2544 | // value of the local symbol. | |
2545 | void | |
2546 | add_local_pair_with_rel(Relobj* object, unsigned int sym_index, | |
2547 | unsigned int shndx, unsigned int got_type, | |
2548 | Output_data_reloc_generic* rel_dyn, | |
2549 | unsigned int r_type, uint64_t addend); | |
2550 | ||
bd73a62d AM |
2551 | // Add a pair of entries for a local symbol to the GOT, and add |
2552 | // a dynamic relocation of type R_TYPE using STN_UNDEF on the first. | |
2553 | // The first got entry will have a value of zero, the second the | |
2554 | // value of the local symbol offset by Target::tls_offset_for_local. | |
2555 | void | |
2556 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2557 | unsigned int got_type, | |
2558 | Output_data_reloc_generic* rel_dyn, | |
2559 | unsigned int r_type); | |
7bf1f802 | 2560 | |
ead1e424 ILT |
2561 | // Add a constant to the GOT. This returns the offset of the new |
2562 | // entry from the start of the GOT. | |
2563 | unsigned int | |
2564 | add_constant(Valtype constant) | |
e84fe78f AM |
2565 | { return this->add_got_entry(Got_entry(constant)); } |
2566 | ||
2567 | // Add a pair of constants to the GOT. This returns the offset of | |
2568 | // the new entry from the start of the GOT. | |
2569 | unsigned int | |
2570 | add_constant_pair(Valtype c1, Valtype c2) | |
2571 | { return this->add_got_entry_pair(Got_entry(c1), Got_entry(c2)); } | |
ead1e424 | 2572 | |
cf43a2fe AM |
2573 | // Replace GOT entry I with a new constant. |
2574 | void | |
2575 | replace_constant(unsigned int i, Valtype constant) | |
2576 | { | |
2577 | this->replace_got_entry(i, Got_entry(constant)); | |
2578 | } | |
2579 | ||
6fa2a40b | 2580 | // Reserve a slot in the GOT for a local symbol. |
4829d394 | 2581 | void |
83896202 ILT |
2582 | reserve_local(unsigned int i, Relobj* object, unsigned int sym_index, |
2583 | unsigned int got_type); | |
4829d394 CC |
2584 | |
2585 | // Reserve a slot in the GOT for a global symbol. | |
2586 | void | |
6fa2a40b | 2587 | reserve_global(unsigned int i, Symbol* gsym, unsigned int got_type); |
4829d394 | 2588 | |
27bc2bce | 2589 | protected: |
ead1e424 ILT |
2590 | // Write out the GOT table. |
2591 | void | |
2592 | do_write(Output_file*); | |
2593 | ||
7d9e3d98 ILT |
2594 | // Write to a map file. |
2595 | void | |
2596 | do_print_to_mapfile(Mapfile* mapfile) const | |
2597 | { mapfile->print_output_data(this, _("** GOT")); } | |
2598 | ||
dd74ae06 CC |
2599 | // Reserve the slot at index I in the GOT. |
2600 | virtual void | |
2601 | do_reserve_slot(unsigned int i) | |
2602 | { this->free_list_.remove(i * got_size / 8, (i + 1) * got_size / 8); } | |
2603 | ||
cf43a2fe AM |
2604 | // Return the number of words in the GOT. |
2605 | unsigned int | |
2606 | num_entries () const | |
2607 | { return this->entries_.size(); } | |
2608 | ||
2609 | // Return the offset into the GOT of GOT entry I. | |
2610 | unsigned int | |
2611 | got_offset(unsigned int i) const | |
2612 | { return i * (got_size / 8); } | |
2613 | ||
ead1e424 ILT |
2614 | private: |
2615 | // This POD class holds a single GOT entry. | |
2616 | class Got_entry | |
2617 | { | |
2618 | public: | |
2619 | // Create a zero entry. | |
2620 | Got_entry() | |
7ef8ae7c VR |
2621 | : local_sym_index_(RESERVED_CODE), use_plt_or_tls_offset_(false), |
2622 | addend_(0) | |
ead1e424 ILT |
2623 | { this->u_.constant = 0; } |
2624 | ||
2625 | // Create a global symbol entry. | |
bd73a62d AM |
2626 | Got_entry(Symbol* gsym, bool use_plt_or_tls_offset) |
2627 | : local_sym_index_(GSYM_CODE), | |
7ef8ae7c | 2628 | use_plt_or_tls_offset_(use_plt_or_tls_offset), addend_(0) |
ead1e424 ILT |
2629 | { this->u_.gsym = gsym; } |
2630 | ||
2631 | // Create a local symbol entry. | |
83896202 | 2632 | Got_entry(Relobj* object, unsigned int local_sym_index, |
bd73a62d AM |
2633 | bool use_plt_or_tls_offset) |
2634 | : local_sym_index_(local_sym_index), | |
7ef8ae7c | 2635 | use_plt_or_tls_offset_(use_plt_or_tls_offset), addend_(0) |
ead1e424 | 2636 | { |
a3ad94ed | 2637 | gold_assert(local_sym_index != GSYM_CODE |
7223e9ca | 2638 | && local_sym_index != CONSTANT_CODE |
4829d394 | 2639 | && local_sym_index != RESERVED_CODE |
7223e9ca | 2640 | && local_sym_index == this->local_sym_index_); |
ead1e424 ILT |
2641 | this->u_.object = object; |
2642 | } | |
2643 | ||
7ef8ae7c VR |
2644 | // Create a local symbol entry plus addend. |
2645 | Got_entry(Relobj* object, unsigned int local_sym_index, | |
1130c90e | 2646 | bool use_plt_or_tls_offset, uint64_t addend) |
7ef8ae7c VR |
2647 | : local_sym_index_(local_sym_index), |
2648 | use_plt_or_tls_offset_(use_plt_or_tls_offset), addend_(addend) | |
2649 | { | |
2650 | gold_assert(local_sym_index != GSYM_CODE | |
2651 | && local_sym_index != CONSTANT_CODE | |
2652 | && local_sym_index != RESERVED_CODE | |
2653 | && local_sym_index == this->local_sym_index_); | |
2654 | this->u_.object = object; | |
2655 | } | |
2656 | ||
ead1e424 ILT |
2657 | // Create a constant entry. The constant is a host value--it will |
2658 | // be swapped, if necessary, when it is written out. | |
a3ad94ed | 2659 | explicit Got_entry(Valtype constant) |
bd73a62d | 2660 | : local_sym_index_(CONSTANT_CODE), use_plt_or_tls_offset_(false) |
ead1e424 ILT |
2661 | { this->u_.constant = constant; } |
2662 | ||
2663 | // Write the GOT entry to an output view. | |
2664 | void | |
bd73a62d | 2665 | write(unsigned int got_indx, unsigned char* pov) const; |
ead1e424 ILT |
2666 | |
2667 | private: | |
2668 | enum | |
2669 | { | |
7223e9ca | 2670 | GSYM_CODE = 0x7fffffff, |
4829d394 CC |
2671 | CONSTANT_CODE = 0x7ffffffe, |
2672 | RESERVED_CODE = 0x7ffffffd | |
ead1e424 ILT |
2673 | }; |
2674 | ||
2675 | union | |
2676 | { | |
2677 | // For a local symbol, the object. | |
83896202 | 2678 | Relobj* object; |
ead1e424 ILT |
2679 | // For a global symbol, the symbol. |
2680 | Symbol* gsym; | |
2681 | // For a constant, the constant. | |
2682 | Valtype constant; | |
2683 | } u_; | |
c06b7b0b ILT |
2684 | // For a local symbol, the local symbol index. This is GSYM_CODE |
2685 | // for a global symbol, or CONSTANT_CODE for a constant. | |
7223e9ca ILT |
2686 | unsigned int local_sym_index_ : 31; |
2687 | // Whether to use the PLT offset of the symbol if it has one. | |
bd73a62d AM |
2688 | // For TLS symbols, whether to offset the symbol value. |
2689 | bool use_plt_or_tls_offset_ : 1; | |
7ef8ae7c VR |
2690 | // The addend. |
2691 | uint64_t addend_; | |
ead1e424 ILT |
2692 | }; |
2693 | ||
2694 | typedef std::vector<Got_entry> Got_entries; | |
2695 | ||
4829d394 CC |
2696 | // Create a new GOT entry and return its offset. |
2697 | unsigned int | |
2698 | add_got_entry(Got_entry got_entry); | |
2699 | ||
2700 | // Create a pair of new GOT entries and return the offset of the first. | |
2701 | unsigned int | |
2702 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2); | |
2703 | ||
cf43a2fe AM |
2704 | // Replace GOT entry I with a new value. |
2705 | void | |
2706 | replace_got_entry(unsigned int i, Got_entry got_entry); | |
ead1e424 ILT |
2707 | |
2708 | // Return the offset into the GOT of the last entry added. | |
2709 | unsigned int | |
2710 | last_got_offset() const | |
cf43a2fe | 2711 | { return this->got_offset(this->num_entries() - 1); } |
ead1e424 ILT |
2712 | |
2713 | // Set the size of the section. | |
2714 | void | |
2715 | set_got_size() | |
cf43a2fe | 2716 | { this->set_current_data_size(this->got_offset(this->num_entries())); } |
ead1e424 ILT |
2717 | |
2718 | // The list of GOT entries. | |
2719 | Got_entries entries_; | |
4829d394 CC |
2720 | |
2721 | // List of available regions within the section, for incremental | |
2722 | // update links. | |
2723 | Free_list free_list_; | |
ead1e424 ILT |
2724 | }; |
2725 | ||
a3ad94ed ILT |
2726 | // Output_data_dynamic is used to hold the data in SHT_DYNAMIC |
2727 | // section. | |
2728 | ||
2729 | class Output_data_dynamic : public Output_section_data | |
2730 | { | |
2731 | public: | |
9025d29d | 2732 | Output_data_dynamic(Stringpool* pool) |
730cdc88 | 2733 | : Output_section_data(Output_data::default_alignment()), |
9025d29d | 2734 | entries_(), pool_(pool) |
a3ad94ed ILT |
2735 | { } |
2736 | ||
2737 | // Add a new dynamic entry with a fixed numeric value. | |
2738 | void | |
2739 | add_constant(elfcpp::DT tag, unsigned int val) | |
2740 | { this->add_entry(Dynamic_entry(tag, val)); } | |
2741 | ||
16649710 | 2742 | // Add a new dynamic entry with the address of output data. |
a3ad94ed | 2743 | void |
16649710 ILT |
2744 | add_section_address(elfcpp::DT tag, const Output_data* od) |
2745 | { this->add_entry(Dynamic_entry(tag, od, false)); } | |
a3ad94ed | 2746 | |
c2b45e22 CC |
2747 | // Add a new dynamic entry with the address of output data |
2748 | // plus a constant offset. | |
2749 | void | |
2750 | add_section_plus_offset(elfcpp::DT tag, const Output_data* od, | |
34171bc5 | 2751 | unsigned int offset) |
2ea97941 | 2752 | { this->add_entry(Dynamic_entry(tag, od, offset)); } |
c2b45e22 | 2753 | |
16649710 | 2754 | // Add a new dynamic entry with the size of output data. |
a3ad94ed | 2755 | void |
16649710 ILT |
2756 | add_section_size(elfcpp::DT tag, const Output_data* od) |
2757 | { this->add_entry(Dynamic_entry(tag, od, true)); } | |
a3ad94ed | 2758 | |
612a8d3d DM |
2759 | // Add a new dynamic entry with the total size of two output datas. |
2760 | void | |
2761 | add_section_size(elfcpp::DT tag, const Output_data* od, | |
2762 | const Output_data* od2) | |
2763 | { this->add_entry(Dynamic_entry(tag, od, od2)); } | |
2764 | ||
a3ad94ed ILT |
2765 | // Add a new dynamic entry with the address of a symbol. |
2766 | void | |
16649710 | 2767 | add_symbol(elfcpp::DT tag, const Symbol* sym) |
a3ad94ed ILT |
2768 | { this->add_entry(Dynamic_entry(tag, sym)); } |
2769 | ||
2770 | // Add a new dynamic entry with a string. | |
2771 | void | |
2772 | add_string(elfcpp::DT tag, const char* str) | |
cfd73a4e | 2773 | { this->add_entry(Dynamic_entry(tag, this->pool_->add(str, true, NULL))); } |
a3ad94ed | 2774 | |
41f542e7 ILT |
2775 | void |
2776 | add_string(elfcpp::DT tag, const std::string& str) | |
2777 | { this->add_string(tag, str.c_str()); } | |
2778 | ||
918fc1f8 CC |
2779 | // Add a new dynamic entry with custom value. |
2780 | void | |
2781 | add_custom(elfcpp::DT tag) | |
2782 | { this->add_entry(Dynamic_entry(tag)); } | |
2783 | ||
a8ecc9fe VR |
2784 | // Get a dynamic entry offset. |
2785 | unsigned int | |
2786 | get_entry_offset(elfcpp::DT tag) const; | |
2787 | ||
27bc2bce ILT |
2788 | protected: |
2789 | // Adjust the output section to set the entry size. | |
2790 | void | |
2791 | do_adjust_output_section(Output_section*); | |
2792 | ||
a3ad94ed ILT |
2793 | // Set the final data size. |
2794 | void | |
27bc2bce | 2795 | set_final_data_size(); |
a3ad94ed ILT |
2796 | |
2797 | // Write out the dynamic entries. | |
2798 | void | |
2799 | do_write(Output_file*); | |
2800 | ||
7d9e3d98 ILT |
2801 | // Write to a map file. |
2802 | void | |
2803 | do_print_to_mapfile(Mapfile* mapfile) const | |
2804 | { mapfile->print_output_data(this, _("** dynamic")); } | |
2805 | ||
a3ad94ed ILT |
2806 | private: |
2807 | // This POD class holds a single dynamic entry. | |
2808 | class Dynamic_entry | |
2809 | { | |
2810 | public: | |
2811 | // Create an entry with a fixed numeric value. | |
2ea97941 ILT |
2812 | Dynamic_entry(elfcpp::DT tag, unsigned int val) |
2813 | : tag_(tag), offset_(DYNAMIC_NUMBER) | |
a3ad94ed ILT |
2814 | { this->u_.val = val; } |
2815 | ||
2816 | // Create an entry with the size or address of a section. | |
2ea97941 ILT |
2817 | Dynamic_entry(elfcpp::DT tag, const Output_data* od, bool section_size) |
2818 | : tag_(tag), | |
c2b45e22 CC |
2819 | offset_(section_size |
2820 | ? DYNAMIC_SECTION_SIZE | |
2821 | : DYNAMIC_SECTION_ADDRESS) | |
612a8d3d DM |
2822 | { |
2823 | this->u_.od = od; | |
2824 | this->od2 = NULL; | |
2825 | } | |
2826 | ||
2827 | // Create an entry with the size of two sections. | |
2828 | Dynamic_entry(elfcpp::DT tag, const Output_data* od, const Output_data* od2) | |
2829 | : tag_(tag), | |
2830 | offset_(DYNAMIC_SECTION_SIZE) | |
2831 | { | |
2832 | this->u_.od = od; | |
2833 | this->od2 = od2; | |
2834 | } | |
c2b45e22 CC |
2835 | |
2836 | // Create an entry with the address of a section plus a constant offset. | |
2ea97941 ILT |
2837 | Dynamic_entry(elfcpp::DT tag, const Output_data* od, unsigned int offset) |
2838 | : tag_(tag), | |
c2b45e22 | 2839 | offset_(offset) |
16649710 | 2840 | { this->u_.od = od; } |
a3ad94ed ILT |
2841 | |
2842 | // Create an entry with the address of a symbol. | |
2ea97941 ILT |
2843 | Dynamic_entry(elfcpp::DT tag, const Symbol* sym) |
2844 | : tag_(tag), offset_(DYNAMIC_SYMBOL) | |
a3ad94ed ILT |
2845 | { this->u_.sym = sym; } |
2846 | ||
2847 | // Create an entry with a string. | |
2ea97941 ILT |
2848 | Dynamic_entry(elfcpp::DT tag, const char* str) |
2849 | : tag_(tag), offset_(DYNAMIC_STRING) | |
a3ad94ed ILT |
2850 | { this->u_.str = str; } |
2851 | ||
918fc1f8 CC |
2852 | // Create an entry with a custom value. |
2853 | Dynamic_entry(elfcpp::DT tag) | |
2854 | : tag_(tag), offset_(DYNAMIC_CUSTOM) | |
2855 | { } | |
2856 | ||
20e6d0d6 DK |
2857 | // Return the tag of this entry. |
2858 | elfcpp::DT | |
2859 | tag() const | |
2860 | { return this->tag_; } | |
2861 | ||
a3ad94ed ILT |
2862 | // Write the dynamic entry to an output view. |
2863 | template<int size, bool big_endian> | |
2864 | void | |
7d1a9ebb | 2865 | write(unsigned char* pov, const Stringpool*) const; |
a3ad94ed ILT |
2866 | |
2867 | private: | |
c2b45e22 | 2868 | // Classification is encoded in the OFFSET field. |
a3ad94ed ILT |
2869 | enum Classification |
2870 | { | |
a3ad94ed | 2871 | // Section address. |
c2b45e22 CC |
2872 | DYNAMIC_SECTION_ADDRESS = 0, |
2873 | // Number. | |
2874 | DYNAMIC_NUMBER = -1U, | |
a3ad94ed | 2875 | // Section size. |
c2b45e22 | 2876 | DYNAMIC_SECTION_SIZE = -2U, |
5c3024d2 | 2877 | // Symbol address. |
c2b45e22 | 2878 | DYNAMIC_SYMBOL = -3U, |
a3ad94ed | 2879 | // String. |
918fc1f8 CC |
2880 | DYNAMIC_STRING = -4U, |
2881 | // Custom value. | |
2882 | DYNAMIC_CUSTOM = -5U | |
c2b45e22 | 2883 | // Any other value indicates a section address plus OFFSET. |
a3ad94ed ILT |
2884 | }; |
2885 | ||
2886 | union | |
2887 | { | |
2888 | // For DYNAMIC_NUMBER. | |
2889 | unsigned int val; | |
c2b45e22 | 2890 | // For DYNAMIC_SECTION_SIZE and section address plus OFFSET. |
16649710 | 2891 | const Output_data* od; |
a3ad94ed | 2892 | // For DYNAMIC_SYMBOL. |
16649710 | 2893 | const Symbol* sym; |
a3ad94ed ILT |
2894 | // For DYNAMIC_STRING. |
2895 | const char* str; | |
2896 | } u_; | |
612a8d3d DM |
2897 | // For DYNAMIC_SYMBOL with two sections. |
2898 | const Output_data* od2; | |
a3ad94ed ILT |
2899 | // The dynamic tag. |
2900 | elfcpp::DT tag_; | |
c2b45e22 CC |
2901 | // The type of entry (Classification) or offset within a section. |
2902 | unsigned int offset_; | |
a3ad94ed ILT |
2903 | }; |
2904 | ||
2905 | // Add an entry to the list. | |
2906 | void | |
2907 | add_entry(const Dynamic_entry& entry) | |
2908 | { this->entries_.push_back(entry); } | |
2909 | ||
2910 | // Sized version of write function. | |
2911 | template<int size, bool big_endian> | |
2912 | void | |
2913 | sized_write(Output_file* of); | |
2914 | ||
2915 | // The type of the list of entries. | |
2916 | typedef std::vector<Dynamic_entry> Dynamic_entries; | |
2917 | ||
a3ad94ed ILT |
2918 | // The entries. |
2919 | Dynamic_entries entries_; | |
2920 | // The pool used for strings. | |
2921 | Stringpool* pool_; | |
2922 | }; | |
2923 | ||
d491d34e ILT |
2924 | // Output_symtab_xindex is used to handle SHT_SYMTAB_SHNDX sections, |
2925 | // which may be required if the object file has more than | |
2926 | // SHN_LORESERVE sections. | |
2927 | ||
2928 | class Output_symtab_xindex : public Output_section_data | |
2929 | { | |
2930 | public: | |
2931 | Output_symtab_xindex(size_t symcount) | |
20e6d0d6 | 2932 | : Output_section_data(symcount * 4, 4, true), |
d491d34e ILT |
2933 | entries_() |
2934 | { } | |
2935 | ||
2936 | // Add an entry: symbol number SYMNDX has section SHNDX. | |
2937 | void | |
2938 | add(unsigned int symndx, unsigned int shndx) | |
2939 | { this->entries_.push_back(std::make_pair(symndx, shndx)); } | |
2940 | ||
2941 | protected: | |
2942 | void | |
2943 | do_write(Output_file*); | |
2944 | ||
7d9e3d98 ILT |
2945 | // Write to a map file. |
2946 | void | |
2947 | do_print_to_mapfile(Mapfile* mapfile) const | |
2948 | { mapfile->print_output_data(this, _("** symtab xindex")); } | |
2949 | ||
d491d34e ILT |
2950 | private: |
2951 | template<bool big_endian> | |
2952 | void | |
2953 | endian_do_write(unsigned char*); | |
2954 | ||
2955 | // It is likely that most symbols will not require entries. Rather | |
2956 | // than keep a vector for all symbols, we keep pairs of symbol index | |
2957 | // and section index. | |
2958 | typedef std::vector<std::pair<unsigned int, unsigned int> > Xindex_entries; | |
2959 | ||
2960 | // The entries we need. | |
2961 | Xindex_entries entries_; | |
2962 | }; | |
2963 | ||
20e6d0d6 | 2964 | // A relaxed input section. |
c0a62865 | 2965 | class Output_relaxed_input_section : public Output_section_data_build |
20e6d0d6 DK |
2966 | { |
2967 | public: | |
2968 | // We would like to call relobj->section_addralign(shndx) to get the | |
2969 | // alignment but we do not want the constructor to fail. So callers | |
2970 | // are repsonsible for ensuring that. | |
2ea97941 ILT |
2971 | Output_relaxed_input_section(Relobj* relobj, unsigned int shndx, |
2972 | uint64_t addralign) | |
2973 | : Output_section_data_build(addralign), relobj_(relobj), shndx_(shndx) | |
20e6d0d6 | 2974 | { } |
34171bc5 | 2975 | |
20e6d0d6 DK |
2976 | // Return the Relobj of this relaxed input section. |
2977 | Relobj* | |
2978 | relobj() const | |
2979 | { return this->relobj_; } | |
34171bc5 | 2980 | |
20e6d0d6 DK |
2981 | // Return the section index of this relaxed input section. |
2982 | unsigned int | |
2983 | shndx() const | |
2984 | { return this->shndx_; } | |
2985 | ||
ec661b9d AM |
2986 | protected: |
2987 | void | |
2988 | set_relobj(Relobj* relobj) | |
2989 | { this->relobj_ = relobj; } | |
2990 | ||
2991 | void | |
2992 | set_shndx(unsigned int shndx) | |
2993 | { this->shndx_ = shndx; } | |
2994 | ||
20e6d0d6 DK |
2995 | private: |
2996 | Relobj* relobj_; | |
2997 | unsigned int shndx_; | |
2998 | }; | |
2999 | ||
0439c796 DK |
3000 | // This class describes properties of merge data sections. It is used |
3001 | // as a key type for maps. | |
3002 | class Merge_section_properties | |
3003 | { | |
3004 | public: | |
3005 | Merge_section_properties(bool is_string, uint64_t entsize, | |
3006 | uint64_t addralign) | |
3007 | : is_string_(is_string), entsize_(entsize), addralign_(addralign) | |
3008 | { } | |
3009 | ||
3010 | // Whether this equals to another Merge_section_properties MSP. | |
3011 | bool | |
3012 | eq(const Merge_section_properties& msp) const | |
3013 | { | |
3014 | return ((this->is_string_ == msp.is_string_) | |
3015 | && (this->entsize_ == msp.entsize_) | |
3016 | && (this->addralign_ == msp.addralign_)); | |
3017 | } | |
3018 | ||
3019 | // Compute a hash value for this using 64-bit FNV-1a hash. | |
3020 | size_t | |
3021 | hash_value() const | |
3022 | { | |
3023 | uint64_t h = 14695981039346656037ULL; // FNV offset basis. | |
3024 | uint64_t prime = 1099511628211ULL; | |
3025 | h = (h ^ static_cast<uint64_t>(this->is_string_)) * prime; | |
3026 | h = (h ^ static_cast<uint64_t>(this->entsize_)) * prime; | |
3027 | h = (h ^ static_cast<uint64_t>(this->addralign_)) * prime; | |
3028 | return h; | |
3029 | } | |
34171bc5 | 3030 | |
0439c796 DK |
3031 | // Functors for associative containers. |
3032 | struct equal_to | |
3033 | { | |
3034 | bool | |
3035 | operator()(const Merge_section_properties& msp1, | |
3036 | const Merge_section_properties& msp2) const | |
3037 | { return msp1.eq(msp2); } | |
3038 | }; | |
3039 | ||
3040 | struct hash | |
3041 | { | |
3042 | size_t | |
3043 | operator()(const Merge_section_properties& msp) const | |
3044 | { return msp.hash_value(); } | |
3045 | }; | |
3046 | ||
3047 | private: | |
3048 | // Whether this merge data section is for strings. | |
3049 | bool is_string_; | |
3050 | // Entsize of this merge data section. | |
3051 | uint64_t entsize_; | |
3052 | // Address alignment. | |
3053 | uint64_t addralign_; | |
3054 | }; | |
3055 | ||
3056 | // This class is used to speed up look up of special input sections in an | |
3057 | // Output_section. | |
3058 | ||
3059 | class Output_section_lookup_maps | |
3060 | { | |
3061 | public: | |
3062 | Output_section_lookup_maps() | |
3063 | : is_valid_(true), merge_sections_by_properties_(), | |
67f95b96 | 3064 | relaxed_input_sections_by_id_() |
0439c796 DK |
3065 | { } |
3066 | ||
3067 | // Whether the maps are valid. | |
3068 | bool | |
3069 | is_valid() const | |
3070 | { return this->is_valid_; } | |
3071 | ||
3072 | // Invalidate the maps. | |
3073 | void | |
3074 | invalidate() | |
3075 | { this->is_valid_ = false; } | |
3076 | ||
3077 | // Clear the maps. | |
3078 | void | |
3079 | clear() | |
3080 | { | |
3081 | this->merge_sections_by_properties_.clear(); | |
0439c796 DK |
3082 | this->relaxed_input_sections_by_id_.clear(); |
3083 | // A cleared map is valid. | |
3084 | this->is_valid_ = true; | |
3085 | } | |
34171bc5 | 3086 | |
0439c796 DK |
3087 | // Find a merge section by merge section properties. Return NULL if none |
3088 | // is found. | |
3089 | Output_merge_base* | |
3090 | find_merge_section(const Merge_section_properties& msp) const | |
3091 | { | |
3092 | gold_assert(this->is_valid_); | |
3093 | Merge_sections_by_properties::const_iterator p = | |
3094 | this->merge_sections_by_properties_.find(msp); | |
3095 | return p != this->merge_sections_by_properties_.end() ? p->second : NULL; | |
3096 | } | |
3097 | ||
0439c796 DK |
3098 | // Add a merge section pointed by POMB with properties MSP. |
3099 | void | |
3100 | add_merge_section(const Merge_section_properties& msp, | |
3101 | Output_merge_base* pomb) | |
3102 | { | |
3103 | std::pair<Merge_section_properties, Output_merge_base*> value(msp, pomb); | |
3104 | std::pair<Merge_sections_by_properties::iterator, bool> result = | |
3105 | this->merge_sections_by_properties_.insert(value); | |
82742395 | 3106 | gold_assert(result.second); |
0439c796 | 3107 | } |
34171bc5 | 3108 | |
0439c796 DK |
3109 | // Find a relaxed input section of OBJECT with index SHNDX. |
3110 | Output_relaxed_input_section* | |
efc6fa12 | 3111 | find_relaxed_input_section(const Relobj* object, unsigned int shndx) const |
0439c796 DK |
3112 | { |
3113 | gold_assert(this->is_valid_); | |
3114 | Relaxed_input_sections_by_id::const_iterator p = | |
3115 | this->relaxed_input_sections_by_id_.find(Const_section_id(object, shndx)); | |
3116 | return p != this->relaxed_input_sections_by_id_.end() ? p->second : NULL; | |
3117 | } | |
3118 | ||
3119 | // Add a relaxed input section pointed by POMB and whose original input | |
3120 | // section is in OBJECT with index SHNDX. | |
3121 | void | |
3122 | add_relaxed_input_section(const Relobj* relobj, unsigned int shndx, | |
3123 | Output_relaxed_input_section* poris) | |
3124 | { | |
3125 | Const_section_id csid(relobj, shndx); | |
3126 | std::pair<Const_section_id, Output_relaxed_input_section*> | |
3127 | value(csid, poris); | |
3128 | std::pair<Relaxed_input_sections_by_id::iterator, bool> result = | |
3129 | this->relaxed_input_sections_by_id_.insert(value); | |
82742395 | 3130 | gold_assert(result.second); |
0439c796 DK |
3131 | } |
3132 | ||
3133 | private: | |
0439c796 DK |
3134 | typedef Unordered_map<Merge_section_properties, Output_merge_base*, |
3135 | Merge_section_properties::hash, | |
3136 | Merge_section_properties::equal_to> | |
3137 | Merge_sections_by_properties; | |
3138 | ||
3139 | typedef Unordered_map<Const_section_id, Output_relaxed_input_section*, | |
3140 | Const_section_id_hash> | |
3141 | Relaxed_input_sections_by_id; | |
3142 | ||
3143 | // Whether this is valid | |
3144 | bool is_valid_; | |
3145 | // Merge sections by merge section properties. | |
3146 | Merge_sections_by_properties merge_sections_by_properties_; | |
0439c796 DK |
3147 | // Relaxed sections by section IDs. |
3148 | Relaxed_input_sections_by_id relaxed_input_sections_by_id_; | |
3149 | }; | |
3150 | ||
8ea8cd50 CC |
3151 | // This abstract base class defines the interface for the |
3152 | // types of methods used to fill free space left in an output | |
3153 | // section during an incremental link. These methods are used | |
3154 | // to insert dummy compilation units into debug info so that | |
3155 | // debug info consumers can scan the debug info serially. | |
3156 | ||
3157 | class Output_fill | |
3158 | { | |
3159 | public: | |
3160 | Output_fill() | |
3161 | : is_big_endian_(parameters->target().is_big_endian()) | |
3162 | { } | |
3163 | ||
81c82a68 ILT |
3164 | virtual |
3165 | ~Output_fill() | |
3166 | { } | |
3167 | ||
8ea8cd50 CC |
3168 | // Return the smallest size chunk of free space that can be |
3169 | // filled with a dummy compilation unit. | |
3170 | size_t | |
3171 | minimum_hole_size() const | |
3172 | { return this->do_minimum_hole_size(); } | |
3173 | ||
3174 | // Write a fill pattern of length LEN at offset OFF in the file. | |
3175 | void | |
3176 | write(Output_file* of, off_t off, size_t len) const | |
3177 | { this->do_write(of, off, len); } | |
3178 | ||
3179 | protected: | |
3180 | virtual size_t | |
3181 | do_minimum_hole_size() const = 0; | |
3182 | ||
3183 | virtual void | |
3184 | do_write(Output_file* of, off_t off, size_t len) const = 0; | |
3185 | ||
3186 | bool | |
3187 | is_big_endian() const | |
3188 | { return this->is_big_endian_; } | |
3189 | ||
3190 | private: | |
3191 | bool is_big_endian_; | |
3192 | }; | |
3193 | ||
3194 | // Fill method that introduces a dummy compilation unit in | |
3195 | // a .debug_info or .debug_types section. | |
3196 | ||
3197 | class Output_fill_debug_info : public Output_fill | |
3198 | { | |
3199 | public: | |
3200 | Output_fill_debug_info(bool is_debug_types) | |
3201 | : is_debug_types_(is_debug_types) | |
3202 | { } | |
3203 | ||
3204 | protected: | |
3205 | virtual size_t | |
3206 | do_minimum_hole_size() const; | |
3207 | ||
3208 | virtual void | |
3209 | do_write(Output_file* of, off_t off, size_t len) const; | |
3210 | ||
3211 | private: | |
3212 | // Version of the header. | |
3213 | static const int version = 4; | |
3214 | // True if this is a .debug_types section. | |
3215 | bool is_debug_types_; | |
3216 | }; | |
3217 | ||
3218 | // Fill method that introduces a dummy compilation unit in | |
3219 | // a .debug_line section. | |
3220 | ||
3221 | class Output_fill_debug_line : public Output_fill | |
3222 | { | |
3223 | public: | |
3224 | Output_fill_debug_line() | |
3225 | { } | |
3226 | ||
3227 | protected: | |
3228 | virtual size_t | |
3229 | do_minimum_hole_size() const; | |
3230 | ||
3231 | virtual void | |
3232 | do_write(Output_file* of, off_t off, size_t len) const; | |
3233 | ||
3234 | private: | |
3235 | // Version of the header. We write a DWARF-3 header because it's smaller | |
3236 | // and many tools have not yet been updated to understand the DWARF-4 header. | |
3237 | static const int version = 3; | |
3238 | // Length of the portion of the header that follows the header_length | |
3239 | // field. This includes the following fields: | |
3240 | // minimum_instruction_length, default_is_stmt, line_base, line_range, | |
3241 | // opcode_base, standard_opcode_lengths[], include_directories, filenames. | |
3242 | // The standard_opcode_lengths array is 12 bytes long, and the | |
3243 | // include_directories and filenames fields each contain only a single | |
3244 | // null byte. | |
3245 | static const size_t header_length = 19; | |
3246 | }; | |
3247 | ||
a2fb1b05 ILT |
3248 | // An output section. We don't expect to have too many output |
3249 | // sections, so we don't bother to do a template on the size. | |
3250 | ||
54dc6425 | 3251 | class Output_section : public Output_data |
a2fb1b05 ILT |
3252 | { |
3253 | public: | |
3254 | // Create an output section, giving the name, type, and flags. | |
96803768 | 3255 | Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword); |
54dc6425 | 3256 | virtual ~Output_section(); |
a2fb1b05 | 3257 | |
ead1e424 | 3258 | // Add a new input section SHNDX, named NAME, with header SHDR, from |
730cdc88 | 3259 | // object OBJECT. RELOC_SHNDX is the index of a relocation section |
eff45813 | 3260 | // which applies to this section, or 0 if none, or -1 if more than |
a445fddf ILT |
3261 | // one. HAVE_SECTIONS_SCRIPT is true if we have a SECTIONS clause |
3262 | // in a linker script; in that case we need to keep track of input | |
3263 | // sections associated with an output section. Return the offset | |
3264 | // within the output section. | |
a2fb1b05 ILT |
3265 | template<int size, bool big_endian> |
3266 | off_t | |
6fa2a40b | 3267 | add_input_section(Layout* layout, Sized_relobj_file<size, big_endian>* object, |
34171bc5 | 3268 | unsigned int shndx, const char* name, |
730cdc88 | 3269 | const elfcpp::Shdr<size, big_endian>& shdr, |
a445fddf | 3270 | unsigned int reloc_shndx, bool have_sections_script); |
a2fb1b05 | 3271 | |
b8e6aad9 | 3272 | // Add generated data POSD to this output section. |
c06b7b0b | 3273 | void |
ead1e424 ILT |
3274 | add_output_section_data(Output_section_data* posd); |
3275 | ||
d06fb4d1 DK |
3276 | // Add a relaxed input section PORIS called NAME to this output section |
3277 | // with LAYOUT. | |
c0a62865 | 3278 | void |
d06fb4d1 DK |
3279 | add_relaxed_input_section(Layout* layout, |
3280 | Output_relaxed_input_section* poris, | |
3281 | const std::string& name); | |
c0a62865 | 3282 | |
a2fb1b05 ILT |
3283 | // Return the section name. |
3284 | const char* | |
3285 | name() const | |
3286 | { return this->name_; } | |
3287 | ||
3288 | // Return the section type. | |
3289 | elfcpp::Elf_Word | |
3290 | type() const | |
3291 | { return this->type_; } | |
3292 | ||
3293 | // Return the section flags. | |
3294 | elfcpp::Elf_Xword | |
3295 | flags() const | |
3296 | { return this->flags_; } | |
3297 | ||
e9552f7e ST |
3298 | typedef std::map<Section_id, unsigned int> Section_layout_order; |
3299 | ||
3300 | void | |
f0558624 | 3301 | update_section_layout(const Section_layout_order* order_map); |
e9552f7e | 3302 | |
154e0e9a ILT |
3303 | // Update the output section flags based on input section flags. |
3304 | void | |
9c547ec3 | 3305 | update_flags_for_input_section(elfcpp::Elf_Xword flags); |
154e0e9a | 3306 | |
fb8b9dbc L |
3307 | // Set the output section flags. |
3308 | void | |
3309 | set_flags(elfcpp::Elf_Xword flags) | |
3310 | { this->flags_ = flags; } | |
3311 | ||
a3ad94ed ILT |
3312 | // Return the entsize field. |
3313 | uint64_t | |
3314 | entsize() const | |
3315 | { return this->entsize_; } | |
3316 | ||
61ba1cf9 ILT |
3317 | // Set the entsize field. |
3318 | void | |
16649710 | 3319 | set_entsize(uint64_t v); |
61ba1cf9 | 3320 | |
a445fddf ILT |
3321 | // Set the load address. |
3322 | void | |
2ea97941 | 3323 | set_load_address(uint64_t load_address) |
a445fddf | 3324 | { |
2ea97941 | 3325 | this->load_address_ = load_address; |
a445fddf ILT |
3326 | this->has_load_address_ = true; |
3327 | } | |
3328 | ||
16649710 ILT |
3329 | // Set the link field to the output section index of a section. |
3330 | void | |
14b31740 | 3331 | set_link_section(const Output_data* od) |
16649710 ILT |
3332 | { |
3333 | gold_assert(this->link_ == 0 | |
3334 | && !this->should_link_to_symtab_ | |
3335 | && !this->should_link_to_dynsym_); | |
3336 | this->link_section_ = od; | |
3337 | } | |
3338 | ||
3339 | // Set the link field to a constant. | |
61ba1cf9 ILT |
3340 | void |
3341 | set_link(unsigned int v) | |
16649710 ILT |
3342 | { |
3343 | gold_assert(this->link_section_ == NULL | |
3344 | && !this->should_link_to_symtab_ | |
3345 | && !this->should_link_to_dynsym_); | |
3346 | this->link_ = v; | |
3347 | } | |
61ba1cf9 | 3348 | |
16649710 ILT |
3349 | // Record that this section should link to the normal symbol table. |
3350 | void | |
3351 | set_should_link_to_symtab() | |
3352 | { | |
3353 | gold_assert(this->link_section_ == NULL | |
3354 | && this->link_ == 0 | |
3355 | && !this->should_link_to_dynsym_); | |
3356 | this->should_link_to_symtab_ = true; | |
3357 | } | |
3358 | ||
3359 | // Record that this section should link to the dynamic symbol table. | |
3360 | void | |
3361 | set_should_link_to_dynsym() | |
3362 | { | |
3363 | gold_assert(this->link_section_ == NULL | |
3364 | && this->link_ == 0 | |
3365 | && !this->should_link_to_symtab_); | |
3366 | this->should_link_to_dynsym_ = true; | |
3367 | } | |
3368 | ||
3369 | // Return the info field. | |
3370 | unsigned int | |
3371 | info() const | |
3372 | { | |
755ab8af ILT |
3373 | gold_assert(this->info_section_ == NULL |
3374 | && this->info_symndx_ == NULL); | |
16649710 ILT |
3375 | return this->info_; |
3376 | } | |
3377 | ||
3378 | // Set the info field to the output section index of a section. | |
3379 | void | |
755ab8af | 3380 | set_info_section(const Output_section* os) |
16649710 | 3381 | { |
755ab8af ILT |
3382 | gold_assert((this->info_section_ == NULL |
3383 | || (this->info_section_ == os | |
3384 | && this->info_uses_section_index_)) | |
3385 | && this->info_symndx_ == NULL | |
3386 | && this->info_ == 0); | |
3387 | this->info_section_ = os; | |
3388 | this->info_uses_section_index_= true; | |
16649710 ILT |
3389 | } |
3390 | ||
6a74a719 ILT |
3391 | // Set the info field to the symbol table index of a symbol. |
3392 | void | |
3393 | set_info_symndx(const Symbol* sym) | |
3394 | { | |
755ab8af ILT |
3395 | gold_assert(this->info_section_ == NULL |
3396 | && (this->info_symndx_ == NULL | |
3397 | || this->info_symndx_ == sym) | |
3398 | && this->info_ == 0); | |
6a74a719 ILT |
3399 | this->info_symndx_ = sym; |
3400 | } | |
3401 | ||
755ab8af ILT |
3402 | // Set the info field to the symbol table index of a section symbol. |
3403 | void | |
3404 | set_info_section_symndx(const Output_section* os) | |
3405 | { | |
3406 | gold_assert((this->info_section_ == NULL | |
3407 | || (this->info_section_ == os | |
3408 | && !this->info_uses_section_index_)) | |
3409 | && this->info_symndx_ == NULL | |
3410 | && this->info_ == 0); | |
3411 | this->info_section_ = os; | |
3412 | this->info_uses_section_index_ = false; | |
3413 | } | |
3414 | ||
16649710 | 3415 | // Set the info field to a constant. |
61ba1cf9 ILT |
3416 | void |
3417 | set_info(unsigned int v) | |
16649710 | 3418 | { |
755ab8af ILT |
3419 | gold_assert(this->info_section_ == NULL |
3420 | && this->info_symndx_ == NULL | |
3421 | && (this->info_ == 0 | |
3422 | || this->info_ == v)); | |
16649710 ILT |
3423 | this->info_ = v; |
3424 | } | |
61ba1cf9 ILT |
3425 | |
3426 | // Set the addralign field. | |
3427 | void | |
3428 | set_addralign(uint64_t v) | |
3429 | { this->addralign_ = v; } | |
3430 | ||
ec661b9d AM |
3431 | void |
3432 | checkpoint_set_addralign(uint64_t val) | |
3433 | { | |
3434 | if (this->checkpoint_ != NULL) | |
3435 | this->checkpoint_->set_addralign(val); | |
3436 | } | |
3437 | ||
d491d34e ILT |
3438 | // Whether the output section index has been set. |
3439 | bool | |
3440 | has_out_shndx() const | |
3441 | { return this->out_shndx_ != -1U; } | |
3442 | ||
c06b7b0b ILT |
3443 | // Indicate that we need a symtab index. |
3444 | void | |
3445 | set_needs_symtab_index() | |
3446 | { this->needs_symtab_index_ = true; } | |
3447 | ||
3448 | // Return whether we need a symtab index. | |
3449 | bool | |
3450 | needs_symtab_index() const | |
3451 | { return this->needs_symtab_index_; } | |
3452 | ||
3453 | // Get the symtab index. | |
3454 | unsigned int | |
3455 | symtab_index() const | |
3456 | { | |
a3ad94ed | 3457 | gold_assert(this->symtab_index_ != 0); |
c06b7b0b ILT |
3458 | return this->symtab_index_; |
3459 | } | |
3460 | ||
3461 | // Set the symtab index. | |
3462 | void | |
3463 | set_symtab_index(unsigned int index) | |
3464 | { | |
a3ad94ed | 3465 | gold_assert(index != 0); |
c06b7b0b ILT |
3466 | this->symtab_index_ = index; |
3467 | } | |
3468 | ||
3469 | // Indicate that we need a dynsym index. | |
3470 | void | |
3471 | set_needs_dynsym_index() | |
3472 | { this->needs_dynsym_index_ = true; } | |
3473 | ||
3474 | // Return whether we need a dynsym index. | |
3475 | bool | |
3476 | needs_dynsym_index() const | |
3477 | { return this->needs_dynsym_index_; } | |
3478 | ||
3479 | // Get the dynsym index. | |
3480 | unsigned int | |
3481 | dynsym_index() const | |
3482 | { | |
a3ad94ed | 3483 | gold_assert(this->dynsym_index_ != 0); |
c06b7b0b ILT |
3484 | return this->dynsym_index_; |
3485 | } | |
3486 | ||
3487 | // Set the dynsym index. | |
3488 | void | |
3489 | set_dynsym_index(unsigned int index) | |
3490 | { | |
a3ad94ed | 3491 | gold_assert(index != 0); |
c06b7b0b ILT |
3492 | this->dynsym_index_ = index; |
3493 | } | |
3494 | ||
9e9143bc ST |
3495 | // Sort the attached input sections. |
3496 | void | |
3497 | sort_attached_input_sections(); | |
3498 | ||
2fd32231 ILT |
3499 | // Return whether the input sections sections attachd to this output |
3500 | // section may require sorting. This is used to handle constructor | |
3501 | // priorities compatibly with GNU ld. | |
3502 | bool | |
3503 | may_sort_attached_input_sections() const | |
3504 | { return this->may_sort_attached_input_sections_; } | |
3505 | ||
3506 | // Record that the input sections attached to this output section | |
3507 | // may require sorting. | |
3508 | void | |
3509 | set_may_sort_attached_input_sections() | |
3510 | { this->may_sort_attached_input_sections_ = true; } | |
3511 | ||
6e9ba2ca ST |
3512 | // Returns true if input sections must be sorted according to the |
3513 | // order in which their name appear in the --section-ordering-file. | |
3514 | bool | |
3515 | input_section_order_specified() | |
3516 | { return this->input_section_order_specified_; } | |
3517 | ||
3518 | // Record that input sections must be sorted as some of their names | |
3519 | // match the patterns specified through --section-ordering-file. | |
3520 | void | |
3521 | set_input_section_order_specified() | |
3522 | { this->input_section_order_specified_ = true; } | |
3523 | ||
2fd32231 ILT |
3524 | // Return whether the input sections attached to this output section |
3525 | // require sorting. This is used to handle constructor priorities | |
3526 | // compatibly with GNU ld. | |
3527 | bool | |
3528 | must_sort_attached_input_sections() const | |
3529 | { return this->must_sort_attached_input_sections_; } | |
3530 | ||
3531 | // Record that the input sections attached to this output section | |
3532 | // require sorting. | |
3533 | void | |
3534 | set_must_sort_attached_input_sections() | |
3535 | { this->must_sort_attached_input_sections_ = true; } | |
3536 | ||
22f0da72 ILT |
3537 | // Get the order in which this section appears in the PT_LOAD output |
3538 | // segment. | |
3539 | Output_section_order | |
3540 | order() const | |
3541 | { return this->order_; } | |
3542 | ||
3543 | // Set the order for this section. | |
3544 | void | |
3545 | set_order(Output_section_order order) | |
3546 | { this->order_ = order; } | |
3547 | ||
9f1d377b ILT |
3548 | // Return whether this section holds relro data--data which has |
3549 | // dynamic relocations but which may be marked read-only after the | |
3550 | // dynamic relocations have been completed. | |
3551 | bool | |
3552 | is_relro() const | |
3553 | { return this->is_relro_; } | |
3554 | ||
3555 | // Record that this section holds relro data. | |
3556 | void | |
3557 | set_is_relro() | |
3558 | { this->is_relro_ = true; } | |
3559 | ||
2d924fd9 ILT |
3560 | // Record that this section does not hold relro data. |
3561 | void | |
3562 | clear_is_relro() | |
3563 | { this->is_relro_ = false; } | |
3564 | ||
8a5e3e08 ILT |
3565 | // True if this is a small section: a section which holds small |
3566 | // variables. | |
3567 | bool | |
3568 | is_small_section() const | |
3569 | { return this->is_small_section_; } | |
3570 | ||
3571 | // Record that this is a small section. | |
3572 | void | |
3573 | set_is_small_section() | |
3574 | { this->is_small_section_ = true; } | |
3575 | ||
3576 | // True if this is a large section: a section which holds large | |
3577 | // variables. | |
3578 | bool | |
3579 | is_large_section() const | |
3580 | { return this->is_large_section_; } | |
3581 | ||
3582 | // Record that this is a large section. | |
3583 | void | |
3584 | set_is_large_section() | |
3585 | { this->is_large_section_ = true; } | |
3586 | ||
3587 | // True if this is a large data (not BSS) section. | |
3588 | bool | |
3589 | is_large_data_section() | |
3590 | { return this->is_large_section_ && this->type_ != elfcpp::SHT_NOBITS; } | |
3591 | ||
730cdc88 ILT |
3592 | // Return whether this section should be written after all the input |
3593 | // sections are complete. | |
3594 | bool | |
3595 | after_input_sections() const | |
3596 | { return this->after_input_sections_; } | |
3597 | ||
3598 | // Record that this section should be written after all the input | |
3599 | // sections are complete. | |
3600 | void | |
3601 | set_after_input_sections() | |
3602 | { this->after_input_sections_ = true; } | |
3603 | ||
27bc2bce ILT |
3604 | // Return whether this section requires postprocessing after all |
3605 | // relocations have been applied. | |
3606 | bool | |
3607 | requires_postprocessing() const | |
3608 | { return this->requires_postprocessing_; } | |
3609 | ||
16164a6b ST |
3610 | bool |
3611 | is_unique_segment() const | |
3612 | { return this->is_unique_segment_; } | |
3613 | ||
3614 | void | |
3615 | set_is_unique_segment() | |
3616 | { this->is_unique_segment_ = true; } | |
3617 | ||
3618 | uint64_t extra_segment_flags() const | |
3619 | { return this->extra_segment_flags_; } | |
3620 | ||
3621 | void | |
3622 | set_extra_segment_flags(uint64_t flags) | |
3623 | { this->extra_segment_flags_ = flags; } | |
3624 | ||
3625 | uint64_t segment_alignment() const | |
3626 | { return this->segment_alignment_; } | |
3627 | ||
3628 | void | |
3629 | set_segment_alignment(uint64_t align) | |
3630 | { this->segment_alignment_ = align; } | |
34171bc5 | 3631 | |
96803768 ILT |
3632 | // If a section requires postprocessing, return the buffer to use. |
3633 | unsigned char* | |
3634 | postprocessing_buffer() const | |
3635 | { | |
3636 | gold_assert(this->postprocessing_buffer_ != NULL); | |
3637 | return this->postprocessing_buffer_; | |
3638 | } | |
3639 | ||
3640 | // If a section requires postprocessing, create the buffer to use. | |
27bc2bce | 3641 | void |
96803768 ILT |
3642 | create_postprocessing_buffer(); |
3643 | ||
3644 | // If a section requires postprocessing, this is the size of the | |
3645 | // buffer to which relocations should be applied. | |
3646 | off_t | |
3647 | postprocessing_buffer_size() const | |
3648 | { return this->current_data_size_for_child(); } | |
27bc2bce | 3649 | |
755ab8af ILT |
3650 | // Modify the section name. This is only permitted for an |
3651 | // unallocated section, and only before the size has been finalized. | |
3652 | // Otherwise the name will not get into Layout::namepool_. | |
3653 | void | |
3654 | set_name(const char* newname) | |
3655 | { | |
3656 | gold_assert((this->flags_ & elfcpp::SHF_ALLOC) == 0); | |
3657 | gold_assert(!this->is_data_size_valid()); | |
3658 | this->name_ = newname; | |
3659 | } | |
3660 | ||
730cdc88 ILT |
3661 | // Return whether the offset OFFSET in the input section SHNDX in |
3662 | // object OBJECT is being included in the link. | |
3663 | bool | |
3664 | is_input_address_mapped(const Relobj* object, unsigned int shndx, | |
3665 | off_t offset) const; | |
3666 | ||
3667 | // Return the offset within the output section of OFFSET relative to | |
3668 | // the start of input section SHNDX in object OBJECT. | |
8383303e ILT |
3669 | section_offset_type |
3670 | output_offset(const Relobj* object, unsigned int shndx, | |
3671 | section_offset_type offset) const; | |
730cdc88 | 3672 | |
b8e6aad9 ILT |
3673 | // Return the output virtual address of OFFSET relative to the start |
3674 | // of input section SHNDX in object OBJECT. | |
3675 | uint64_t | |
3676 | output_address(const Relobj* object, unsigned int shndx, | |
3677 | off_t offset) const; | |
3678 | ||
e29e076a ILT |
3679 | // Look for the merged section for input section SHNDX in object |
3680 | // OBJECT. If found, return true, and set *ADDR to the address of | |
3681 | // the start of the merged section. This is not necessary the | |
3682 | // output offset corresponding to input offset 0 in the section, | |
3683 | // since the section may be mapped arbitrarily. | |
3684 | bool | |
3685 | find_starting_output_address(const Relobj* object, unsigned int shndx, | |
3686 | uint64_t* addr) const; | |
a9a60db6 | 3687 | |
a445fddf ILT |
3688 | // Record that this output section was found in the SECTIONS clause |
3689 | // of a linker script. | |
3690 | void | |
3691 | set_found_in_sections_clause() | |
3692 | { this->found_in_sections_clause_ = true; } | |
3693 | ||
3694 | // Return whether this output section was found in the SECTIONS | |
3695 | // clause of a linker script. | |
3696 | bool | |
3697 | found_in_sections_clause() const | |
3698 | { return this->found_in_sections_clause_; } | |
3699 | ||
27bc2bce ILT |
3700 | // Write the section header into *OPHDR. |
3701 | template<int size, bool big_endian> | |
3702 | void | |
3703 | write_header(const Layout*, const Stringpool*, | |
3704 | elfcpp::Shdr_write<size, big_endian>*) const; | |
3705 | ||
a445fddf ILT |
3706 | // The next few calls are for linker script support. |
3707 | ||
ead1e424 ILT |
3708 | // In some cases we need to keep a list of the input sections |
3709 | // associated with this output section. We only need the list if we | |
3710 | // might have to change the offsets of the input section within the | |
3711 | // output section after we add the input section. The ordinary | |
3712 | // input sections will be written out when we process the object | |
3713 | // file, and as such we don't need to track them here. We do need | |
3714 | // to track Output_section_data objects here. We store instances of | |
3715 | // this structure in a std::vector, so it must be a POD. There can | |
3716 | // be many instances of this structure, so we use a union to save | |
3717 | // some space. | |
3718 | class Input_section | |
3719 | { | |
3720 | public: | |
3721 | Input_section() | |
b8e6aad9 ILT |
3722 | : shndx_(0), p2align_(0) |
3723 | { | |
3724 | this->u1_.data_size = 0; | |
3725 | this->u2_.object = NULL; | |
3726 | } | |
ead1e424 | 3727 | |
b8e6aad9 | 3728 | // For an ordinary input section. |
2ea97941 ILT |
3729 | Input_section(Relobj* object, unsigned int shndx, off_t data_size, |
3730 | uint64_t addralign) | |
3731 | : shndx_(shndx), | |
6e9ba2ca ST |
3732 | p2align_(ffsll(static_cast<long long>(addralign))), |
3733 | section_order_index_(0) | |
ead1e424 | 3734 | { |
2ea97941 ILT |
3735 | gold_assert(shndx != OUTPUT_SECTION_CODE |
3736 | && shndx != MERGE_DATA_SECTION_CODE | |
3737 | && shndx != MERGE_STRING_SECTION_CODE | |
3738 | && shndx != RELAXED_INPUT_SECTION_CODE); | |
3739 | this->u1_.data_size = data_size; | |
b8e6aad9 | 3740 | this->u2_.object = object; |
ead1e424 ILT |
3741 | } |
3742 | ||
b8e6aad9 | 3743 | // For a non-merge output section. |
ead1e424 | 3744 | Input_section(Output_section_data* posd) |
6e9ba2ca ST |
3745 | : shndx_(OUTPUT_SECTION_CODE), p2align_(0), |
3746 | section_order_index_(0) | |
b8e6aad9 ILT |
3747 | { |
3748 | this->u1_.data_size = 0; | |
3749 | this->u2_.posd = posd; | |
3750 | } | |
3751 | ||
3752 | // For a merge section. | |
3753 | Input_section(Output_section_data* posd, bool is_string, uint64_t entsize) | |
3754 | : shndx_(is_string | |
3755 | ? MERGE_STRING_SECTION_CODE | |
3756 | : MERGE_DATA_SECTION_CODE), | |
6e9ba2ca ST |
3757 | p2align_(0), |
3758 | section_order_index_(0) | |
b8e6aad9 ILT |
3759 | { |
3760 | this->u1_.entsize = entsize; | |
3761 | this->u2_.posd = posd; | |
3762 | } | |
ead1e424 | 3763 | |
20e6d0d6 | 3764 | // For a relaxed input section. |
ca09d69a | 3765 | Input_section(Output_relaxed_input_section* psection) |
6e9ba2ca ST |
3766 | : shndx_(RELAXED_INPUT_SECTION_CODE), p2align_(0), |
3767 | section_order_index_(0) | |
20e6d0d6 DK |
3768 | { |
3769 | this->u1_.data_size = 0; | |
3770 | this->u2_.poris = psection; | |
3771 | } | |
3772 | ||
6e9ba2ca ST |
3773 | unsigned int |
3774 | section_order_index() const | |
3775 | { | |
3776 | return this->section_order_index_; | |
3777 | } | |
3778 | ||
3779 | void | |
3780 | set_section_order_index(unsigned int number) | |
3781 | { | |
3782 | this->section_order_index_ = number; | |
3783 | } | |
3784 | ||
ead1e424 ILT |
3785 | // The required alignment. |
3786 | uint64_t | |
3787 | addralign() const | |
a3ad94ed | 3788 | { |
6625d24e DK |
3789 | if (this->p2align_ != 0) |
3790 | return static_cast<uint64_t>(1) << (this->p2align_ - 1); | |
3791 | else if (!this->is_input_section()) | |
f34787f8 | 3792 | return this->u2_.posd->addralign(); |
6625d24e DK |
3793 | else |
3794 | return 0; | |
a3ad94ed | 3795 | } |
ead1e424 | 3796 | |
6625d24e DK |
3797 | // Set the required alignment, which must be either 0 or a power of 2. |
3798 | // For input sections that are sub-classes of Output_section_data, a | |
3799 | // alignment of zero means asking the underlying object for alignment. | |
3800 | void | |
3801 | set_addralign(uint64_t addralign) | |
3802 | { | |
3803 | if (addralign == 0) | |
3804 | this->p2align_ = 0; | |
3805 | else | |
3806 | { | |
3807 | gold_assert((addralign & (addralign - 1)) == 0); | |
3808 | this->p2align_ = ffsll(static_cast<long long>(addralign)); | |
3809 | } | |
3810 | } | |
34171bc5 | 3811 | |
cdc29364 CC |
3812 | // Return the current required size, without finalization. |
3813 | off_t | |
3814 | current_data_size() const; | |
3815 | ||
ead1e424 ILT |
3816 | // Return the required size. |
3817 | off_t | |
3818 | data_size() const; | |
3819 | ||
a445fddf ILT |
3820 | // Whether this is an input section. |
3821 | bool | |
3822 | is_input_section() const | |
3823 | { | |
3824 | return (this->shndx_ != OUTPUT_SECTION_CODE | |
3825 | && this->shndx_ != MERGE_DATA_SECTION_CODE | |
20e6d0d6 DK |
3826 | && this->shndx_ != MERGE_STRING_SECTION_CODE |
3827 | && this->shndx_ != RELAXED_INPUT_SECTION_CODE); | |
a445fddf ILT |
3828 | } |
3829 | ||
b8e6aad9 ILT |
3830 | // Return whether this is a merge section which matches the |
3831 | // parameters. | |
3832 | bool | |
87f95776 | 3833 | is_merge_section(bool is_string, uint64_t entsize, |
34171bc5 | 3834 | uint64_t addralign) const |
b8e6aad9 ILT |
3835 | { |
3836 | return (this->shndx_ == (is_string | |
3837 | ? MERGE_STRING_SECTION_CODE | |
3838 | : MERGE_DATA_SECTION_CODE) | |
87f95776 | 3839 | && this->u1_.entsize == entsize |
34171bc5 | 3840 | && this->addralign() == addralign); |
b8e6aad9 ILT |
3841 | } |
3842 | ||
0439c796 DK |
3843 | // Return whether this is a merge section for some input section. |
3844 | bool | |
3845 | is_merge_section() const | |
3846 | { | |
3847 | return (this->shndx_ == MERGE_DATA_SECTION_CODE | |
3848 | || this->shndx_ == MERGE_STRING_SECTION_CODE); | |
3849 | } | |
3850 | ||
20e6d0d6 DK |
3851 | // Return whether this is a relaxed input section. |
3852 | bool | |
3853 | is_relaxed_input_section() const | |
3854 | { return this->shndx_ == RELAXED_INPUT_SECTION_CODE; } | |
3855 | ||
3856 | // Return whether this is a generic Output_section_data. | |
3857 | bool | |
3858 | is_output_section_data() const | |
3859 | { | |
3860 | return this->shndx_ == OUTPUT_SECTION_CODE; | |
3861 | } | |
3862 | ||
a445fddf ILT |
3863 | // Return the object for an input section. |
3864 | Relobj* | |
0439c796 | 3865 | relobj() const; |
a445fddf ILT |
3866 | |
3867 | // Return the input section index for an input section. | |
3868 | unsigned int | |
0439c796 | 3869 | shndx() const; |
a445fddf | 3870 | |
20e6d0d6 DK |
3871 | // For non-input-sections, return the associated Output_section_data |
3872 | // object. | |
3873 | Output_section_data* | |
3874 | output_section_data() const | |
3875 | { | |
3876 | gold_assert(!this->is_input_section()); | |
3877 | return this->u2_.posd; | |
3878 | } | |
34171bc5 | 3879 | |
0439c796 DK |
3880 | // For a merge section, return the Output_merge_base pointer. |
3881 | Output_merge_base* | |
3882 | output_merge_base() const | |
3883 | { | |
3884 | gold_assert(this->is_merge_section()); | |
3885 | return this->u2_.pomb; | |
3886 | } | |
3887 | ||
20e6d0d6 DK |
3888 | // Return the Output_relaxed_input_section object. |
3889 | Output_relaxed_input_section* | |
3890 | relaxed_input_section() const | |
3891 | { | |
3892 | gold_assert(this->is_relaxed_input_section()); | |
3893 | return this->u2_.poris; | |
3894 | } | |
3895 | ||
b8e6aad9 ILT |
3896 | // Set the output section. |
3897 | void | |
3898 | set_output_section(Output_section* os) | |
3899 | { | |
3900 | gold_assert(!this->is_input_section()); | |
34171bc5 AM |
3901 | Output_section_data* posd = |
3902 | this->is_relaxed_input_section() ? this->u2_.poris : this->u2_.posd; | |
20e6d0d6 | 3903 | posd->set_output_section(os); |
b8e6aad9 ILT |
3904 | } |
3905 | ||
ead1e424 | 3906 | // Set the address and file offset. This is called during |
96803768 ILT |
3907 | // Layout::finalize. SECTION_FILE_OFFSET is the file offset of |
3908 | // the enclosing section. | |
ead1e424 | 3909 | void |
96803768 ILT |
3910 | set_address_and_file_offset(uint64_t address, off_t file_offset, |
3911 | off_t section_file_offset); | |
ead1e424 | 3912 | |
a445fddf ILT |
3913 | // Reset the address and file offset. |
3914 | void | |
3915 | reset_address_and_file_offset(); | |
3916 | ||
96803768 ILT |
3917 | // Finalize the data size. |
3918 | void | |
3919 | finalize_data_size(); | |
9a0910c3 | 3920 | |
b8e6aad9 ILT |
3921 | // Add an input section, for SHF_MERGE sections. |
3922 | bool | |
2ea97941 | 3923 | add_input_section(Relobj* object, unsigned int shndx) |
b8e6aad9 ILT |
3924 | { |
3925 | gold_assert(this->shndx_ == MERGE_DATA_SECTION_CODE | |
3926 | || this->shndx_ == MERGE_STRING_SECTION_CODE); | |
2ea97941 | 3927 | return this->u2_.posd->add_input_section(object, shndx); |
b8e6aad9 ILT |
3928 | } |
3929 | ||
3930 | // Given an input OBJECT, an input section index SHNDX within that | |
3931 | // object, and an OFFSET relative to the start of that input | |
730cdc88 | 3932 | // section, return whether or not the output offset is known. If |
1e983657 ILT |
3933 | // this function returns true, it sets *POUTPUT to the offset in |
3934 | // the output section, relative to the start of the input section | |
3935 | // in the output section. *POUTPUT may be different from OFFSET | |
3936 | // for a merged section. | |
b8e6aad9 | 3937 | bool |
8383303e ILT |
3938 | output_offset(const Relobj* object, unsigned int shndx, |
3939 | section_offset_type offset, | |
ca09d69a | 3940 | section_offset_type* poutput) const; |
b8e6aad9 | 3941 | |
ead1e424 ILT |
3942 | // Write out the data. This does nothing for an input section. |
3943 | void | |
3944 | write(Output_file*); | |
3945 | ||
96803768 ILT |
3946 | // Write the data to a buffer. This does nothing for an input |
3947 | // section. | |
3948 | void | |
3949 | write_to_buffer(unsigned char*); | |
3950 | ||
7d9e3d98 ILT |
3951 | // Print to a map file. |
3952 | void | |
3953 | print_to_mapfile(Mapfile*) const; | |
3954 | ||
38c5e8b4 ILT |
3955 | // Print statistics about merge sections to stderr. |
3956 | void | |
3957 | print_merge_stats(const char* section_name) | |
3958 | { | |
3959 | if (this->shndx_ == MERGE_DATA_SECTION_CODE | |
3960 | || this->shndx_ == MERGE_STRING_SECTION_CODE) | |
3961 | this->u2_.posd->print_merge_stats(section_name); | |
3962 | } | |
3963 | ||
ead1e424 | 3964 | private: |
b8e6aad9 ILT |
3965 | // Code values which appear in shndx_. If the value is not one of |
3966 | // these codes, it is the input section index in the object file. | |
3967 | enum | |
3968 | { | |
3969 | // An Output_section_data. | |
3970 | OUTPUT_SECTION_CODE = -1U, | |
3971 | // An Output_section_data for an SHF_MERGE section with | |
3972 | // SHF_STRINGS not set. | |
3973 | MERGE_DATA_SECTION_CODE = -2U, | |
3974 | // An Output_section_data for an SHF_MERGE section with | |
3975 | // SHF_STRINGS set. | |
20e6d0d6 DK |
3976 | MERGE_STRING_SECTION_CODE = -3U, |
3977 | // An Output_section_data for a relaxed input section. | |
3978 | RELAXED_INPUT_SECTION_CODE = -4U | |
b8e6aad9 ILT |
3979 | }; |
3980 | ||
b8e6aad9 ILT |
3981 | // For an ordinary input section, this is the section index in the |
3982 | // input file. For an Output_section_data, this is | |
3983 | // OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or | |
3984 | // MERGE_STRING_SECTION_CODE. | |
ead1e424 ILT |
3985 | unsigned int shndx_; |
3986 | // The required alignment, stored as a power of 2. | |
3987 | unsigned int p2align_; | |
ead1e424 ILT |
3988 | union |
3989 | { | |
b8e6aad9 ILT |
3990 | // For an ordinary input section, the section size. |
3991 | off_t data_size; | |
20e6d0d6 DK |
3992 | // For OUTPUT_SECTION_CODE or RELAXED_INPUT_SECTION_CODE, this is not |
3993 | // used. For MERGE_DATA_SECTION_CODE or MERGE_STRING_SECTION_CODE, the | |
b8e6aad9 ILT |
3994 | // entity size. |
3995 | uint64_t entsize; | |
3996 | } u1_; | |
3997 | union | |
3998 | { | |
3999 | // For an ordinary input section, the object which holds the | |
ead1e424 | 4000 | // input section. |
f6ce93d6 | 4001 | Relobj* object; |
b8e6aad9 ILT |
4002 | // For OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or |
4003 | // MERGE_STRING_SECTION_CODE, the data. | |
ead1e424 | 4004 | Output_section_data* posd; |
0439c796 | 4005 | Output_merge_base* pomb; |
20e6d0d6 DK |
4006 | // For RELAXED_INPUT_SECTION_CODE, the data. |
4007 | Output_relaxed_input_section* poris; | |
b8e6aad9 | 4008 | } u2_; |
6e9ba2ca ST |
4009 | // The line number of the pattern it matches in the --section-ordering-file |
4010 | // file. It is 0 if does not match any pattern. | |
4011 | unsigned int section_order_index_; | |
ead1e424 ILT |
4012 | }; |
4013 | ||
6625d24e DK |
4014 | // Store the list of input sections for this Output_section into the |
4015 | // list passed in. This removes the input sections, leaving only | |
4016 | // any Output_section_data elements. This returns the size of those | |
4017 | // Output_section_data elements. ADDRESS is the address of this | |
4018 | // output section. FILL is the fill value to use, in case there are | |
4019 | // any spaces between the remaining Output_section_data elements. | |
4020 | uint64_t | |
4021 | get_input_sections(uint64_t address, const std::string& fill, | |
4022 | std::list<Input_section>*); | |
4023 | ||
4024 | // Add a script input section. A script input section can either be | |
4025 | // a plain input section or a sub-class of Output_section_data. | |
4026 | void | |
4027 | add_script_input_section(const Input_section& input_section); | |
4028 | ||
4029 | // Set the current size of the output section. | |
4030 | void | |
4031 | set_current_data_size(off_t size) | |
4032 | { this->set_current_data_size_for_child(size); } | |
4033 | ||
6625d24e DK |
4034 | // End of linker script support. |
4035 | ||
4036 | // Save states before doing section layout. | |
4037 | // This is used for relaxation. | |
4038 | void | |
4039 | save_states(); | |
4040 | ||
4041 | // Restore states prior to section layout. | |
4042 | void | |
4043 | restore_states(); | |
4044 | ||
4045 | // Discard states. | |
4046 | void | |
4047 | discard_states(); | |
4048 | ||
4049 | // Convert existing input sections to relaxed input sections. | |
4050 | void | |
4051 | convert_input_sections_to_relaxed_sections( | |
4052 | const std::vector<Output_relaxed_input_section*>& sections); | |
4053 | ||
4054 | // Find a relaxed input section to an input section in OBJECT | |
4055 | // with index SHNDX. Return NULL if none is found. | |
4056 | const Output_relaxed_input_section* | |
4057 | find_relaxed_input_section(const Relobj* object, unsigned int shndx) const; | |
34171bc5 | 4058 | |
6625d24e DK |
4059 | // Whether section offsets need adjustment due to relaxation. |
4060 | bool | |
4061 | section_offsets_need_adjustment() const | |
4062 | { return this->section_offsets_need_adjustment_; } | |
4063 | ||
4064 | // Set section_offsets_need_adjustment to be true. | |
4065 | void | |
4066 | set_section_offsets_need_adjustment() | |
4067 | { this->section_offsets_need_adjustment_ = true; } | |
4068 | ||
ec661b9d AM |
4069 | // Set section_offsets_need_adjustment to be false. |
4070 | void | |
4071 | clear_section_offsets_need_adjustment() | |
4072 | { this->section_offsets_need_adjustment_ = false; } | |
4073 | ||
6625d24e DK |
4074 | // Adjust section offsets of input sections in this. This is |
4075 | // requires if relaxation caused some input sections to change sizes. | |
4076 | void | |
4077 | adjust_section_offsets(); | |
4078 | ||
4079 | // Whether this is a NOLOAD section. | |
4080 | bool | |
4081 | is_noload() const | |
4082 | { return this->is_noload_; } | |
4083 | ||
4084 | // Set NOLOAD flag. | |
4085 | void | |
4086 | set_is_noload() | |
4087 | { this->is_noload_ = true; } | |
4088 | ||
4089 | // Print merge statistics to stderr. | |
4090 | void | |
4091 | print_merge_stats(); | |
4092 | ||
cdc29364 CC |
4093 | // Set a fixed layout for the section. Used for incremental update links. |
4094 | void | |
4095 | set_fixed_layout(uint64_t sh_addr, off_t sh_offset, off_t sh_size, | |
4096 | uint64_t sh_addralign); | |
4097 | ||
4098 | // Return TRUE if the section has a fixed layout. | |
4099 | bool | |
4100 | has_fixed_layout() const | |
4101 | { return this->has_fixed_layout_; } | |
4102 | ||
9fbd3822 CC |
4103 | // Set flag to allow patch space for this section. Used for full |
4104 | // incremental links. | |
4105 | void | |
4106 | set_is_patch_space_allowed() | |
4107 | { this->is_patch_space_allowed_ = true; } | |
4108 | ||
8ea8cd50 CC |
4109 | // Set a fill method to use for free space left in the output section |
4110 | // during incremental links. | |
4111 | void | |
4112 | set_free_space_fill(Output_fill* free_space_fill) | |
4113 | { | |
4114 | this->free_space_fill_ = free_space_fill; | |
4115 | this->free_list_.set_min_hole_size(free_space_fill->minimum_hole_size()); | |
4116 | } | |
4117 | ||
cdc29364 CC |
4118 | // Reserve space within the fixed layout for the section. Used for |
4119 | // incremental update links. | |
4120 | void | |
4121 | reserve(uint64_t sh_offset, uint64_t sh_size); | |
4122 | ||
5146f448 CC |
4123 | // Allocate space from the free list for the section. Used for |
4124 | // incremental update links. | |
4125 | off_t | |
4126 | allocate(off_t len, uint64_t addralign); | |
4127 | ||
ec661b9d AM |
4128 | typedef std::vector<Input_section> Input_section_list; |
4129 | ||
4130 | // Allow access to the input sections. | |
4131 | const Input_section_list& | |
4132 | input_sections() const | |
4133 | { return this->input_sections_; } | |
4134 | ||
d8f5a274 AM |
4135 | Input_section_list& |
4136 | input_sections() | |
4137 | { return this->input_sections_; } | |
4138 | ||
bce5a025 CC |
4139 | // For -r and --emit-relocs, we need to keep track of the associated |
4140 | // relocation section. | |
4141 | Output_section* | |
4142 | reloc_section() const | |
4143 | { return this->reloc_section_; } | |
4144 | ||
4145 | void | |
4146 | set_reloc_section(Output_section* os) | |
4147 | { this->reloc_section_ = os; } | |
4148 | ||
6625d24e DK |
4149 | protected: |
4150 | // Return the output section--i.e., the object itself. | |
4151 | Output_section* | |
4152 | do_output_section() | |
4153 | { return this; } | |
4154 | ||
4155 | const Output_section* | |
4156 | do_output_section() const | |
4157 | { return this; } | |
4158 | ||
4159 | // Return the section index in the output file. | |
4160 | unsigned int | |
4161 | do_out_shndx() const | |
4162 | { | |
4163 | gold_assert(this->out_shndx_ != -1U); | |
4164 | return this->out_shndx_; | |
4165 | } | |
4166 | ||
4167 | // Set the output section index. | |
4168 | void | |
4169 | do_set_out_shndx(unsigned int shndx) | |
4170 | { | |
4171 | gold_assert(this->out_shndx_ == -1U || this->out_shndx_ == shndx); | |
4172 | this->out_shndx_ = shndx; | |
4173 | } | |
4174 | ||
cdc29364 CC |
4175 | // Update the data size of the Output_section. For a typical |
4176 | // Output_section, there is nothing to do, but if there are any | |
4177 | // Output_section_data objects we need to do a trial layout | |
4178 | // here. | |
4179 | virtual void | |
4180 | update_data_size(); | |
4181 | ||
6625d24e DK |
4182 | // Set the final data size of the Output_section. For a typical |
4183 | // Output_section, there is nothing to do, but if there are any | |
4184 | // Output_section_data objects we need to set their final addresses | |
4185 | // here. | |
4186 | virtual void | |
4187 | set_final_data_size(); | |
4188 | ||
4189 | // Reset the address and file offset. | |
4190 | void | |
4191 | do_reset_address_and_file_offset(); | |
4192 | ||
4193 | // Return true if address and file offset already have reset values. In | |
4194 | // other words, calling reset_address_and_file_offset will not change them. | |
4195 | bool | |
4196 | do_address_and_file_offset_have_reset_values() const; | |
4197 | ||
4198 | // Write the data to the file. For a typical Output_section, this | |
4199 | // does nothing: the data is written out by calling Object::Relocate | |
4200 | // on each input object. But if there are any Output_section_data | |
4201 | // objects we do need to write them out here. | |
4202 | virtual void | |
4203 | do_write(Output_file*); | |
4204 | ||
4205 | // Return the address alignment--function required by parent class. | |
4206 | uint64_t | |
4207 | do_addralign() const | |
4208 | { return this->addralign_; } | |
4209 | ||
4210 | // Return whether there is a load address. | |
4211 | bool | |
4212 | do_has_load_address() const | |
4213 | { return this->has_load_address_; } | |
4214 | ||
4215 | // Return the load address. | |
4216 | uint64_t | |
4217 | do_load_address() const | |
4218 | { | |
4219 | gold_assert(this->has_load_address_); | |
4220 | return this->load_address_; | |
4221 | } | |
4222 | ||
4223 | // Return whether this is an Output_section. | |
4224 | bool | |
4225 | do_is_section() const | |
4226 | { return true; } | |
4227 | ||
4228 | // Return whether this is a section of the specified type. | |
4229 | bool | |
4230 | do_is_section_type(elfcpp::Elf_Word type) const | |
4231 | { return this->type_ == type; } | |
4232 | ||
4233 | // Return whether the specified section flag is set. | |
4234 | bool | |
4235 | do_is_section_flag_set(elfcpp::Elf_Xword flag) const | |
4236 | { return (this->flags_ & flag) != 0; } | |
4237 | ||
4238 | // Set the TLS offset. Called only for SHT_TLS sections. | |
4239 | void | |
4240 | do_set_tls_offset(uint64_t tls_base); | |
4241 | ||
4242 | // Return the TLS offset, relative to the base of the TLS segment. | |
4243 | // Valid only for SHT_TLS sections. | |
4244 | uint64_t | |
4245 | do_tls_offset() const | |
4246 | { return this->tls_offset_; } | |
4247 | ||
4248 | // This may be implemented by a child class. | |
4249 | virtual void | |
4250 | do_finalize_name(Layout*) | |
4251 | { } | |
4252 | ||
4253 | // Print to the map file. | |
4254 | virtual void | |
4255 | do_print_to_mapfile(Mapfile*) const; | |
4256 | ||
4257 | // Record that this section requires postprocessing after all | |
4258 | // relocations have been applied. This is called by a child class. | |
4259 | void | |
4260 | set_requires_postprocessing() | |
4261 | { | |
4262 | this->requires_postprocessing_ = true; | |
4263 | this->after_input_sections_ = true; | |
4264 | } | |
4265 | ||
4266 | // Write all the data of an Output_section into the postprocessing | |
4267 | // buffer. | |
4268 | void | |
4269 | write_to_postprocessing_buffer(); | |
4270 | ||
131687b4 DK |
4271 | // Whether this always keeps an input section list |
4272 | bool | |
4273 | always_keeps_input_sections() const | |
4274 | { return this->always_keeps_input_sections_; } | |
4275 | ||
4276 | // Always keep an input section list. | |
4277 | void | |
4278 | set_always_keeps_input_sections() | |
4279 | { | |
4280 | gold_assert(this->current_data_size_for_child() == 0); | |
4281 | this->always_keeps_input_sections_ = true; | |
4282 | } | |
4283 | ||
c0a62865 | 4284 | private: |
20e6d0d6 DK |
4285 | // We only save enough information to undo the effects of section layout. |
4286 | class Checkpoint_output_section | |
4287 | { | |
4288 | public: | |
2ea97941 ILT |
4289 | Checkpoint_output_section(uint64_t addralign, elfcpp::Elf_Xword flags, |
4290 | const Input_section_list& input_sections, | |
4291 | off_t first_input_offset, | |
4292 | bool attached_input_sections_are_sorted) | |
4293 | : addralign_(addralign), flags_(flags), | |
4294 | input_sections_(input_sections), | |
20e6d0d6 | 4295 | input_sections_size_(input_sections_.size()), |
2ea97941 ILT |
4296 | input_sections_copy_(), first_input_offset_(first_input_offset), |
4297 | attached_input_sections_are_sorted_(attached_input_sections_are_sorted) | |
20e6d0d6 DK |
4298 | { } |
4299 | ||
4300 | virtual | |
4301 | ~Checkpoint_output_section() | |
4302 | { } | |
4303 | ||
4304 | // Return the address alignment. | |
4305 | uint64_t | |
4306 | addralign() const | |
4307 | { return this->addralign_; } | |
4308 | ||
ec661b9d AM |
4309 | void |
4310 | set_addralign(uint64_t val) | |
4311 | { this->addralign_ = val; } | |
4312 | ||
20e6d0d6 DK |
4313 | // Return the section flags. |
4314 | elfcpp::Elf_Xword | |
4315 | flags() const | |
4316 | { return this->flags_; } | |
4317 | ||
4318 | // Return a reference to the input section list copy. | |
c0a62865 DK |
4319 | Input_section_list* |
4320 | input_sections() | |
4321 | { return &this->input_sections_copy_; } | |
20e6d0d6 DK |
4322 | |
4323 | // Return the size of input_sections at the time when checkpoint is | |
4324 | // taken. | |
4325 | size_t | |
4326 | input_sections_size() const | |
4327 | { return this->input_sections_size_; } | |
4328 | ||
4329 | // Whether input sections are copied. | |
4330 | bool | |
4331 | input_sections_saved() const | |
4332 | { return this->input_sections_copy_.size() == this->input_sections_size_; } | |
4333 | ||
4334 | off_t | |
4335 | first_input_offset() const | |
4336 | { return this->first_input_offset_; } | |
4337 | ||
4338 | bool | |
4339 | attached_input_sections_are_sorted() const | |
4340 | { return this->attached_input_sections_are_sorted_; } | |
4341 | ||
4342 | // Save input sections. | |
4343 | void | |
4344 | save_input_sections() | |
4345 | { | |
4346 | this->input_sections_copy_.reserve(this->input_sections_size_); | |
4347 | this->input_sections_copy_.clear(); | |
4348 | Input_section_list::const_iterator p = this->input_sections_.begin(); | |
4349 | gold_assert(this->input_sections_size_ >= this->input_sections_.size()); | |
4350 | for(size_t i = 0; i < this->input_sections_size_ ; i++, ++p) | |
4351 | this->input_sections_copy_.push_back(*p); | |
4352 | } | |
4353 | ||
4354 | private: | |
4355 | // The section alignment. | |
4356 | uint64_t addralign_; | |
4357 | // The section flags. | |
4358 | elfcpp::Elf_Xword flags_; | |
4359 | // Reference to the input sections to be checkpointed. | |
4360 | const Input_section_list& input_sections_; | |
4361 | // Size of the checkpointed portion of input_sections_; | |
4362 | size_t input_sections_size_; | |
4363 | // Copy of input sections. | |
4364 | Input_section_list input_sections_copy_; | |
4365 | // The offset of the first entry in input_sections_. | |
4366 | off_t first_input_offset_; | |
4367 | // True if the input sections attached to this output section have | |
4368 | // already been sorted. | |
4369 | bool attached_input_sections_are_sorted_; | |
4370 | }; | |
4371 | ||
2fd32231 ILT |
4372 | // This class is used to sort the input sections. |
4373 | class Input_section_sort_entry; | |
4374 | ||
2a0ff005 | 4375 | // This is the sort comparison function for ctors and dtors. |
2fd32231 ILT |
4376 | struct Input_section_sort_compare |
4377 | { | |
4378 | bool | |
4379 | operator()(const Input_section_sort_entry&, | |
4380 | const Input_section_sort_entry&) const; | |
4381 | }; | |
4382 | ||
2a0ff005 DK |
4383 | // This is the sort comparison function for .init_array and .fini_array. |
4384 | struct Input_section_sort_init_fini_compare | |
4385 | { | |
4386 | bool | |
4387 | operator()(const Input_section_sort_entry&, | |
4388 | const Input_section_sort_entry&) const; | |
4389 | }; | |
4390 | ||
6e9ba2ca ST |
4391 | // This is the sort comparison function when a section order is specified |
4392 | // from an input file. | |
4393 | struct Input_section_sort_section_order_index_compare | |
4394 | { | |
4395 | bool | |
4396 | operator()(const Input_section_sort_entry&, | |
4397 | const Input_section_sort_entry&) const; | |
4398 | }; | |
4399 | ||
c6ac678d ST |
4400 | // This is the sort comparison function for .text to sort sections with |
4401 | // prefixes .text.{unlikely,exit,startup,hot} before other sections. | |
6934001a CC |
4402 | struct Input_section_sort_section_prefix_special_ordering_compare |
4403 | { | |
4404 | bool | |
4405 | operator()(const Input_section_sort_entry&, | |
4406 | const Input_section_sort_entry&) const; | |
4407 | }; | |
4408 | ||
4409 | // This is the sort comparison function for sorting sections by name. | |
4410 | struct Input_section_sort_section_name_compare | |
c6ac678d ST |
4411 | { |
4412 | bool | |
4413 | operator()(const Input_section_sort_entry&, | |
4414 | const Input_section_sort_entry&) const; | |
4415 | }; | |
4416 | ||
c51e6221 | 4417 | // Fill data. This is used to fill in data between input sections. |
a445fddf ILT |
4418 | // It is also used for data statements (BYTE, WORD, etc.) in linker |
4419 | // scripts. When we have to keep track of the input sections, we | |
4420 | // can use an Output_data_const, but we don't want to have to keep | |
4421 | // track of input sections just to implement fills. | |
c51e6221 ILT |
4422 | class Fill |
4423 | { | |
4424 | public: | |
2ea97941 ILT |
4425 | Fill(off_t section_offset, off_t length) |
4426 | : section_offset_(section_offset), | |
4427 | length_(convert_to_section_size_type(length)) | |
c51e6221 ILT |
4428 | { } |
4429 | ||
4430 | // Return section offset. | |
4431 | off_t | |
4432 | section_offset() const | |
4433 | { return this->section_offset_; } | |
4434 | ||
4435 | // Return fill length. | |
a445fddf | 4436 | section_size_type |
c51e6221 ILT |
4437 | length() const |
4438 | { return this->length_; } | |
4439 | ||
4440 | private: | |
4441 | // The offset within the output section. | |
4442 | off_t section_offset_; | |
4443 | // The length of the space to fill. | |
a445fddf | 4444 | section_size_type length_; |
c51e6221 ILT |
4445 | }; |
4446 | ||
4447 | typedef std::vector<Fill> Fill_list; | |
4448 | ||
c0a62865 | 4449 | // Map used during relaxation of existing sections. This map |
5ac169d4 DK |
4450 | // a section id an input section list index. We assume that |
4451 | // Input_section_list is a vector. | |
4452 | typedef Unordered_map<Section_id, size_t, Section_id_hash> Relaxation_map; | |
c0a62865 | 4453 | |
b8e6aad9 ILT |
4454 | // Add a new output section by Input_section. |
4455 | void | |
4456 | add_output_section_data(Input_section*); | |
4457 | ||
4458 | // Add an SHF_MERGE input section. Returns true if the section was | |
0439c796 DK |
4459 | // handled. If KEEPS_INPUT_SECTIONS is true, the output merge section |
4460 | // stores information about the merged input sections. | |
b8e6aad9 ILT |
4461 | bool |
4462 | add_merge_input_section(Relobj* object, unsigned int shndx, uint64_t flags, | |
0439c796 DK |
4463 | uint64_t entsize, uint64_t addralign, |
4464 | bool keeps_input_sections); | |
b8e6aad9 ILT |
4465 | |
4466 | // Add an output SHF_MERGE section POSD to this output section. | |
4467 | // IS_STRING indicates whether it is a SHF_STRINGS section, and | |
4468 | // ENTSIZE is the entity size. This returns the entry added to | |
4469 | // input_sections_. | |
4470 | void | |
4471 | add_output_merge_section(Output_section_data* posd, bool is_string, | |
4472 | uint64_t entsize); | |
4473 | ||
c0a62865 DK |
4474 | // Find the merge section into which an input section with index SHNDX in |
4475 | // OBJECT has been added. Return NULL if none found. | |
67f95b96 | 4476 | const Output_section_data* |
c0a62865 DK |
4477 | find_merge_section(const Relobj* object, unsigned int shndx) const; |
4478 | ||
c0a62865 DK |
4479 | // Build a relaxation map. |
4480 | void | |
4481 | build_relaxation_map( | |
4482 | const Input_section_list& input_sections, | |
4483 | size_t limit, | |
4484 | Relaxation_map* map) const; | |
4485 | ||
4486 | // Convert input sections in an input section list into relaxed sections. | |
4487 | void | |
4488 | convert_input_sections_in_list_to_relaxed_sections( | |
4489 | const std::vector<Output_relaxed_input_section*>& relaxed_sections, | |
4490 | const Relaxation_map& map, | |
4491 | Input_section_list* input_sections); | |
4492 | ||
0439c796 DK |
4493 | // Build the lookup maps for merge and relaxed input sections. |
4494 | void | |
4495 | build_lookup_maps() const; | |
4496 | ||
a2fb1b05 ILT |
4497 | // Most of these fields are only valid after layout. |
4498 | ||
4499 | // The name of the section. This will point into a Stringpool. | |
9a0910c3 | 4500 | const char* name_; |
75f65a3e | 4501 | // The section address is in the parent class. |
a2fb1b05 ILT |
4502 | // The section alignment. |
4503 | uint64_t addralign_; | |
4504 | // The section entry size. | |
4505 | uint64_t entsize_; | |
a445fddf ILT |
4506 | // The load address. This is only used when using a linker script |
4507 | // with a SECTIONS clause. The has_load_address_ field indicates | |
4508 | // whether this field is valid. | |
4509 | uint64_t load_address_; | |
75f65a3e | 4510 | // The file offset is in the parent class. |
16649710 | 4511 | // Set the section link field to the index of this section. |
14b31740 | 4512 | const Output_data* link_section_; |
16649710 | 4513 | // If link_section_ is NULL, this is the link field. |
a2fb1b05 | 4514 | unsigned int link_; |
16649710 | 4515 | // Set the section info field to the index of this section. |
755ab8af | 4516 | const Output_section* info_section_; |
6a74a719 ILT |
4517 | // If info_section_ is NULL, set the info field to the symbol table |
4518 | // index of this symbol. | |
4519 | const Symbol* info_symndx_; | |
4520 | // If info_section_ and info_symndx_ are NULL, this is the section | |
4521 | // info field. | |
a2fb1b05 ILT |
4522 | unsigned int info_; |
4523 | // The section type. | |
27bc2bce | 4524 | const elfcpp::Elf_Word type_; |
a2fb1b05 | 4525 | // The section flags. |
a445fddf | 4526 | elfcpp::Elf_Xword flags_; |
22f0da72 ILT |
4527 | // The order of this section in the output segment. |
4528 | Output_section_order order_; | |
61ba1cf9 | 4529 | // The section index. |
ead1e424 | 4530 | unsigned int out_shndx_; |
c06b7b0b ILT |
4531 | // If there is a STT_SECTION for this output section in the normal |
4532 | // symbol table, this is the symbol index. This starts out as zero. | |
4533 | // It is initialized in Layout::finalize() to be the index, or -1U | |
4534 | // if there isn't one. | |
4535 | unsigned int symtab_index_; | |
4536 | // If there is a STT_SECTION for this output section in the dynamic | |
4537 | // symbol table, this is the symbol index. This starts out as zero. | |
4538 | // It is initialized in Layout::finalize() to be the index, or -1U | |
4539 | // if there isn't one. | |
4540 | unsigned int dynsym_index_; | |
ead1e424 ILT |
4541 | // The input sections. This will be empty in cases where we don't |
4542 | // need to keep track of them. | |
4543 | Input_section_list input_sections_; | |
4544 | // The offset of the first entry in input_sections_. | |
4545 | off_t first_input_offset_; | |
c51e6221 ILT |
4546 | // The fill data. This is separate from input_sections_ because we |
4547 | // often will need fill sections without needing to keep track of | |
4548 | // input sections. | |
4549 | Fill_list fills_; | |
96803768 ILT |
4550 | // If the section requires postprocessing, this buffer holds the |
4551 | // section contents during relocation. | |
4552 | unsigned char* postprocessing_buffer_; | |
c06b7b0b ILT |
4553 | // Whether this output section needs a STT_SECTION symbol in the |
4554 | // normal symbol table. This will be true if there is a relocation | |
4555 | // which needs it. | |
4556 | bool needs_symtab_index_ : 1; | |
4557 | // Whether this output section needs a STT_SECTION symbol in the | |
4558 | // dynamic symbol table. This will be true if there is a dynamic | |
4559 | // relocation which needs it. | |
4560 | bool needs_dynsym_index_ : 1; | |
16649710 ILT |
4561 | // Whether the link field of this output section should point to the |
4562 | // normal symbol table. | |
4563 | bool should_link_to_symtab_ : 1; | |
4564 | // Whether the link field of this output section should point to the | |
4565 | // dynamic symbol table. | |
4566 | bool should_link_to_dynsym_ : 1; | |
730cdc88 ILT |
4567 | // Whether this section should be written after all the input |
4568 | // sections are complete. | |
4569 | bool after_input_sections_ : 1; | |
27bc2bce ILT |
4570 | // Whether this section requires post processing after all |
4571 | // relocations have been applied. | |
4572 | bool requires_postprocessing_ : 1; | |
a445fddf ILT |
4573 | // Whether an input section was mapped to this output section |
4574 | // because of a SECTIONS clause in a linker script. | |
4575 | bool found_in_sections_clause_ : 1; | |
4576 | // Whether this section has an explicitly specified load address. | |
4577 | bool has_load_address_ : 1; | |
755ab8af ILT |
4578 | // True if the info_section_ field means the section index of the |
4579 | // section, false if it means the symbol index of the corresponding | |
4580 | // section symbol. | |
4581 | bool info_uses_section_index_ : 1; | |
6e9ba2ca ST |
4582 | // True if input sections attached to this output section have to be |
4583 | // sorted according to a specified order. | |
4584 | bool input_section_order_specified_ : 1; | |
2fd32231 ILT |
4585 | // True if the input sections attached to this output section may |
4586 | // need sorting. | |
4587 | bool may_sort_attached_input_sections_ : 1; | |
4588 | // True if the input sections attached to this output section must | |
4589 | // be sorted. | |
4590 | bool must_sort_attached_input_sections_ : 1; | |
4591 | // True if the input sections attached to this output section have | |
4592 | // already been sorted. | |
4593 | bool attached_input_sections_are_sorted_ : 1; | |
9f1d377b ILT |
4594 | // True if this section holds relro data. |
4595 | bool is_relro_ : 1; | |
8a5e3e08 ILT |
4596 | // True if this is a small section. |
4597 | bool is_small_section_ : 1; | |
4598 | // True if this is a large section. | |
4599 | bool is_large_section_ : 1; | |
f5c870d2 ILT |
4600 | // Whether code-fills are generated at write. |
4601 | bool generate_code_fills_at_write_ : 1; | |
e8cd95c7 ILT |
4602 | // Whether the entry size field should be zero. |
4603 | bool is_entsize_zero_ : 1; | |
8923b24c DK |
4604 | // Whether section offsets need adjustment due to relaxation. |
4605 | bool section_offsets_need_adjustment_ : 1; | |
1e5d2fb1 DK |
4606 | // Whether this is a NOLOAD section. |
4607 | bool is_noload_ : 1; | |
131687b4 DK |
4608 | // Whether this always keeps input section. |
4609 | bool always_keeps_input_sections_ : 1; | |
cdc29364 CC |
4610 | // Whether this section has a fixed layout, for incremental update links. |
4611 | bool has_fixed_layout_ : 1; | |
9fbd3822 CC |
4612 | // True if we can add patch space to this section. |
4613 | bool is_patch_space_allowed_ : 1; | |
16164a6b ST |
4614 | // True if this output section goes into a unique segment. |
4615 | bool is_unique_segment_ : 1; | |
7bf1f802 ILT |
4616 | // For SHT_TLS sections, the offset of this section relative to the base |
4617 | // of the TLS segment. | |
4618 | uint64_t tls_offset_; | |
16164a6b ST |
4619 | // Additional segment flags, specified via linker plugin, when mapping some |
4620 | // input sections to unique segments. | |
34171bc5 | 4621 | uint64_t extra_segment_flags_; |
16164a6b ST |
4622 | // Segment alignment specified via linker plugin, when mapping some |
4623 | // input sections to unique segments. | |
4624 | uint64_t segment_alignment_; | |
20e6d0d6 DK |
4625 | // Saved checkpoint. |
4626 | Checkpoint_output_section* checkpoint_; | |
0439c796 DK |
4627 | // Fast lookup maps for merged and relaxed input sections. |
4628 | Output_section_lookup_maps* lookup_maps_; | |
cdc29364 CC |
4629 | // List of available regions within the section, for incremental |
4630 | // update links. | |
4631 | Free_list free_list_; | |
8ea8cd50 CC |
4632 | // Method for filling chunks of free space. |
4633 | Output_fill* free_space_fill_; | |
9fbd3822 CC |
4634 | // Amount added as patch space for incremental linking. |
4635 | off_t patch_space_; | |
bce5a025 CC |
4636 | // Associated relocation section, when emitting relocations. |
4637 | Output_section* reloc_section_; | |
a2fb1b05 ILT |
4638 | }; |
4639 | ||
4640 | // An output segment. PT_LOAD segments are built from collections of | |
4641 | // output sections. Other segments typically point within PT_LOAD | |
4642 | // segments, and are built directly as needed. | |
20e6d0d6 DK |
4643 | // |
4644 | // NOTE: We want to use the copy constructor for this class. During | |
4645 | // relaxation, we may try built the segments multiple times. We do | |
4646 | // that by copying the original segment list before lay-out, doing | |
4647 | // a trial lay-out and roll-back to the saved copied if we need to | |
4648 | // to the lay-out again. | |
a2fb1b05 ILT |
4649 | |
4650 | class Output_segment | |
4651 | { | |
4652 | public: | |
4653 | // Create an output segment, specifying the type and flags. | |
4654 | Output_segment(elfcpp::Elf_Word, elfcpp::Elf_Word); | |
4655 | ||
4656 | // Return the virtual address. | |
4657 | uint64_t | |
4658 | vaddr() const | |
4659 | { return this->vaddr_; } | |
4660 | ||
4661 | // Return the physical address. | |
4662 | uint64_t | |
4663 | paddr() const | |
4664 | { return this->paddr_; } | |
4665 | ||
4666 | // Return the segment type. | |
4667 | elfcpp::Elf_Word | |
4668 | type() const | |
4669 | { return this->type_; } | |
4670 | ||
4671 | // Return the segment flags. | |
4672 | elfcpp::Elf_Word | |
4673 | flags() const | |
4674 | { return this->flags_; } | |
4675 | ||
92e059d8 ILT |
4676 | // Return the memory size. |
4677 | uint64_t | |
4678 | memsz() const | |
4679 | { return this->memsz_; } | |
4680 | ||
ead1e424 ILT |
4681 | // Return the file size. |
4682 | off_t | |
4683 | filesz() const | |
4684 | { return this->filesz_; } | |
4685 | ||
516cb3d0 ILT |
4686 | // Return the file offset. |
4687 | off_t | |
4688 | offset() const | |
4689 | { return this->offset_; } | |
4690 | ||
8a5e3e08 ILT |
4691 | // Whether this is a segment created to hold large data sections. |
4692 | bool | |
4693 | is_large_data_segment() const | |
4694 | { return this->is_large_data_segment_; } | |
4695 | ||
4696 | // Record that this is a segment created to hold large data | |
4697 | // sections. | |
4698 | void | |
4699 | set_is_large_data_segment() | |
4700 | { this->is_large_data_segment_ = true; } | |
4701 | ||
16164a6b ST |
4702 | bool |
4703 | is_unique_segment() const | |
4704 | { return this->is_unique_segment_; } | |
4705 | ||
4706 | // Mark segment as unique, happens when linker plugins request that | |
4707 | // certain input sections be mapped to unique segments. | |
4708 | void | |
4709 | set_is_unique_segment() | |
4710 | { this->is_unique_segment_ = true; } | |
4711 | ||
75f65a3e ILT |
4712 | // Return the maximum alignment of the Output_data. |
4713 | uint64_t | |
a445fddf | 4714 | maximum_alignment(); |
75f65a3e | 4715 | |
22f0da72 ILT |
4716 | // Add the Output_section OS to this PT_LOAD segment. SEG_FLAGS is |
4717 | // the segment flags to use. | |
4718 | void | |
4719 | add_output_section_to_load(Layout* layout, Output_section* os, | |
4720 | elfcpp::Elf_Word seg_flags); | |
4721 | ||
4722 | // Add the Output_section OS to this non-PT_LOAD segment. SEG_FLAGS | |
4723 | // is the segment flags to use. | |
a2fb1b05 | 4724 | void |
22f0da72 ILT |
4725 | add_output_section_to_nonload(Output_section* os, |
4726 | elfcpp::Elf_Word seg_flags); | |
75f65a3e | 4727 | |
1650c4ff ILT |
4728 | // Remove an Output_section from this segment. It is an error if it |
4729 | // is not present. | |
4730 | void | |
4731 | remove_output_section(Output_section* os); | |
4732 | ||
a192ba05 ILT |
4733 | // Add an Output_data (which need not be an Output_section) to the |
4734 | // start of this segment. | |
75f65a3e ILT |
4735 | void |
4736 | add_initial_output_data(Output_data*); | |
4737 | ||
756ac4a8 ILT |
4738 | // Return true if this segment has any sections which hold actual |
4739 | // data, rather than being a BSS section. | |
4740 | bool | |
22f0da72 | 4741 | has_any_data_sections() const; |
756ac4a8 | 4742 | |
22f0da72 ILT |
4743 | // Whether this segment has a dynamic relocs. |
4744 | bool | |
4745 | has_dynamic_reloc() const; | |
4f4c5f80 | 4746 | |
7404fe1b AM |
4747 | // Return the first section. |
4748 | Output_section* | |
4749 | first_section() const; | |
4750 | ||
a445fddf ILT |
4751 | // Return the address of the first section. |
4752 | uint64_t | |
7404fe1b AM |
4753 | first_section_load_address() const |
4754 | { | |
4755 | const Output_section* os = this->first_section(); | |
eb390844 | 4756 | gold_assert(os != NULL); |
7404fe1b AM |
4757 | return os->has_load_address() ? os->load_address() : os->address(); |
4758 | } | |
a445fddf ILT |
4759 | |
4760 | // Return whether the addresses have been set already. | |
4761 | bool | |
4762 | are_addresses_set() const | |
4763 | { return this->are_addresses_set_; } | |
4764 | ||
4765 | // Set the addresses. | |
4766 | void | |
2ea97941 | 4767 | set_addresses(uint64_t vaddr, uint64_t paddr) |
a445fddf | 4768 | { |
2ea97941 ILT |
4769 | this->vaddr_ = vaddr; |
4770 | this->paddr_ = paddr; | |
a445fddf ILT |
4771 | this->are_addresses_set_ = true; |
4772 | } | |
4773 | ||
a192ba05 ILT |
4774 | // Update the flags for the flags of an output section added to this |
4775 | // segment. | |
4776 | void | |
4777 | update_flags_for_output_section(elfcpp::Elf_Xword flags) | |
4778 | { | |
4779 | // The ELF ABI specifies that a PT_TLS segment should always have | |
4780 | // PF_R as the flags. | |
4781 | if (this->type() != elfcpp::PT_TLS) | |
4782 | this->flags_ |= flags; | |
4783 | } | |
4784 | ||
1c4f3631 ILT |
4785 | // Set the segment flags. This is only used if we have a PHDRS |
4786 | // clause which explicitly specifies the flags. | |
4787 | void | |
2ea97941 ILT |
4788 | set_flags(elfcpp::Elf_Word flags) |
4789 | { this->flags_ = flags; } | |
1c4f3631 | 4790 | |
75f65a3e | 4791 | // Set the address of the segment to ADDR and the offset to *POFF |
a445fddf ILT |
4792 | // and set the addresses and offsets of all contained output |
4793 | // sections accordingly. Set the section indexes of all contained | |
4794 | // output sections starting with *PSHNDX. If RESET is true, first | |
4795 | // reset the addresses of the contained sections. Return the | |
4796 | // address of the immediately following segment. Update *POFF and | |
4797 | // *PSHNDX. This should only be called for a PT_LOAD segment. | |
75f65a3e | 4798 | uint64_t |
eb426534 | 4799 | set_section_addresses(const Target*, Layout*, bool reset, uint64_t addr, |
fd064a5b | 4800 | unsigned int* increase_relro, bool* has_relro, |
fc497986 | 4801 | off_t* poff, unsigned int* pshndx); |
75f65a3e | 4802 | |
0496d5e5 ILT |
4803 | // Set the minimum alignment of this segment. This may be adjusted |
4804 | // upward based on the section alignments. | |
4805 | void | |
a445fddf | 4806 | set_minimum_p_align(uint64_t align) |
f6973bdc ILT |
4807 | { |
4808 | if (align > this->min_p_align_) | |
4809 | this->min_p_align_ = align; | |
4810 | } | |
0496d5e5 | 4811 | |
1130c90e RM |
4812 | // Set the memory size of this segment. |
4813 | void | |
4814 | set_size(uint64_t size) | |
4815 | { | |
4816 | this->memsz_ = size; | |
4817 | } | |
4818 | ||
75f65a3e ILT |
4819 | // Set the offset of this segment based on the section. This should |
4820 | // only be called for a non-PT_LOAD segment. | |
4821 | void | |
1a2dff53 | 4822 | set_offset(unsigned int increase); |
75f65a3e | 4823 | |
7bf1f802 ILT |
4824 | // Set the TLS offsets of the sections contained in the PT_TLS segment. |
4825 | void | |
4826 | set_tls_offsets(); | |
4827 | ||
75f65a3e ILT |
4828 | // Return the number of output sections. |
4829 | unsigned int | |
4830 | output_section_count() const; | |
a2fb1b05 | 4831 | |
1c4f3631 ILT |
4832 | // Return the section attached to the list segment with the lowest |
4833 | // load address. This is used when handling a PHDRS clause in a | |
4834 | // linker script. | |
4835 | Output_section* | |
4836 | section_with_lowest_load_address() const; | |
4837 | ||
61ba1cf9 ILT |
4838 | // Write the segment header into *OPHDR. |
4839 | template<int size, bool big_endian> | |
4840 | void | |
ead1e424 | 4841 | write_header(elfcpp::Phdr_write<size, big_endian>*); |
61ba1cf9 ILT |
4842 | |
4843 | // Write the section headers of associated sections into V. | |
4844 | template<int size, bool big_endian> | |
4845 | unsigned char* | |
16649710 | 4846 | write_section_headers(const Layout*, const Stringpool*, unsigned char* v, |
7d1a9ebb | 4847 | unsigned int* pshndx) const; |
61ba1cf9 | 4848 | |
7d9e3d98 ILT |
4849 | // Print the output sections in the map file. |
4850 | void | |
4851 | print_sections_to_mapfile(Mapfile*) const; | |
4852 | ||
a2fb1b05 | 4853 | private: |
22f0da72 | 4854 | typedef std::vector<Output_data*> Output_data_list; |
a2fb1b05 | 4855 | |
ead1e424 ILT |
4856 | // Find the maximum alignment in an Output_data_list. |
4857 | static uint64_t | |
a445fddf | 4858 | maximum_alignment_list(const Output_data_list*); |
ead1e424 | 4859 | |
9f1d377b ILT |
4860 | // Return whether the first data section is a relro section. |
4861 | bool | |
4862 | is_first_section_relro() const; | |
4863 | ||
75f65a3e ILT |
4864 | // Set the section addresses in an Output_data_list. |
4865 | uint64_t | |
cdc29364 | 4866 | set_section_list_addresses(Layout*, bool reset, Output_data_list*, |
5d9f66cb CC |
4867 | uint64_t addr, off_t* poff, off_t* fpoff, |
4868 | unsigned int* pshndx, bool* in_tls); | |
75f65a3e ILT |
4869 | |
4870 | // Return the number of Output_sections in an Output_data_list. | |
4871 | unsigned int | |
4872 | output_section_count_list(const Output_data_list*) const; | |
4873 | ||
22f0da72 ILT |
4874 | // Return whether an Output_data_list has a dynamic reloc. |
4875 | bool | |
4876 | has_dynamic_reloc_list(const Output_data_list*) const; | |
4f4c5f80 | 4877 | |
1c4f3631 ILT |
4878 | // Find the section with the lowest load address in an |
4879 | // Output_data_list. | |
4880 | void | |
4881 | lowest_load_address_in_list(const Output_data_list* pdl, | |
4882 | Output_section** found, | |
4883 | uint64_t* found_lma) const; | |
4884 | ||
5f1ab67a ILT |
4885 | // Find the first and last entries by address. |
4886 | void | |
4887 | find_first_and_last_list(const Output_data_list* pdl, | |
4888 | const Output_data** pfirst, | |
4889 | const Output_data** plast) const; | |
4890 | ||
61ba1cf9 ILT |
4891 | // Write the section headers in the list into V. |
4892 | template<int size, bool big_endian> | |
4893 | unsigned char* | |
16649710 ILT |
4894 | write_section_headers_list(const Layout*, const Stringpool*, |
4895 | const Output_data_list*, unsigned char* v, | |
7d1a9ebb | 4896 | unsigned int* pshdx) const; |
61ba1cf9 | 4897 | |
7d9e3d98 ILT |
4898 | // Print a section list to the mapfile. |
4899 | void | |
4900 | print_section_list_to_mapfile(Mapfile*, const Output_data_list*) const; | |
4901 | ||
20e6d0d6 DK |
4902 | // NOTE: We want to use the copy constructor. Currently, shallow copy |
4903 | // works for us so we do not need to write our own copy constructor. | |
34171bc5 | 4904 | |
22f0da72 ILT |
4905 | // The list of output data attached to this segment. |
4906 | Output_data_list output_lists_[ORDER_MAX]; | |
a2fb1b05 ILT |
4907 | // The segment virtual address. |
4908 | uint64_t vaddr_; | |
4909 | // The segment physical address. | |
4910 | uint64_t paddr_; | |
4911 | // The size of the segment in memory. | |
4912 | uint64_t memsz_; | |
a445fddf ILT |
4913 | // The maximum section alignment. The is_max_align_known_ field |
4914 | // indicates whether this has been finalized. | |
4915 | uint64_t max_align_; | |
4916 | // The required minimum value for the p_align field. This is used | |
4917 | // for PT_LOAD segments. Note that this does not mean that | |
4918 | // addresses should be aligned to this value; it means the p_paddr | |
4919 | // and p_vaddr fields must be congruent modulo this value. For | |
4920 | // non-PT_LOAD segments, the dynamic linker works more efficiently | |
4921 | // if the p_align field has the more conventional value, although it | |
4922 | // can align as needed. | |
4923 | uint64_t min_p_align_; | |
a2fb1b05 ILT |
4924 | // The offset of the segment data within the file. |
4925 | off_t offset_; | |
4926 | // The size of the segment data in the file. | |
4927 | off_t filesz_; | |
4928 | // The segment type; | |
4929 | elfcpp::Elf_Word type_; | |
4930 | // The segment flags. | |
4931 | elfcpp::Elf_Word flags_; | |
a445fddf ILT |
4932 | // Whether we have finalized max_align_. |
4933 | bool is_max_align_known_ : 1; | |
4934 | // Whether vaddr and paddr were set by a linker script. | |
4935 | bool are_addresses_set_ : 1; | |
8a5e3e08 ILT |
4936 | // Whether this segment holds large data sections. |
4937 | bool is_large_data_segment_ : 1; | |
16164a6b ST |
4938 | // Whether this was marked as a unique segment via a linker plugin. |
4939 | bool is_unique_segment_ : 1; | |
a2fb1b05 ILT |
4940 | }; |
4941 | ||
a2fb1b05 ILT |
4942 | } // End namespace gold. |
4943 | ||
4944 | #endif // !defined(GOLD_OUTPUT_H) |