Commit | Line | Data |
---|---|---|
a2fb1b05 ILT |
1 | // output.h -- manage the output file for gold -*- C++ -*- |
2 | ||
eb426534 RM |
3 | // Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2013 |
4 | // Free Software Foundation, Inc. | |
6cb15b7f ILT |
5 | // Written by Ian Lance Taylor <iant@google.com>. |
6 | ||
7 | // This file is part of gold. | |
8 | ||
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; either version 3 of the License, or | |
12 | // (at your option) any later version. | |
13 | ||
14 | // This program is distributed in the hope that it will be useful, | |
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | // GNU General Public License for more details. | |
18 | ||
19 | // You should have received a copy of the GNU General Public License | |
20 | // along with this program; if not, write to the Free Software | |
21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | // MA 02110-1301, USA. | |
23 | ||
a2fb1b05 ILT |
24 | #ifndef GOLD_OUTPUT_H |
25 | #define GOLD_OUTPUT_H | |
26 | ||
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; |
a2fb1b05 | 41 | class Output_file; |
c0a62865 | 42 | class Output_merge_base; |
c06b7b0b | 43 | class Output_section; |
6a74a719 | 44 | class Relocatable_relocs; |
a3ad94ed | 45 | class Target; |
54dc6425 ILT |
46 | template<int size, bool big_endian> |
47 | class Sized_target; | |
c06b7b0b ILT |
48 | template<int size, bool big_endian> |
49 | class Sized_relobj; | |
6fa2a40b CC |
50 | template<int size, bool big_endian> |
51 | class Sized_relobj_file; | |
54dc6425 ILT |
52 | |
53 | // An abtract class for data which has to go into the output file. | |
a2fb1b05 ILT |
54 | |
55 | class Output_data | |
56 | { | |
57 | public: | |
27bc2bce ILT |
58 | explicit Output_data() |
59 | : address_(0), data_size_(0), offset_(-1), | |
60 | is_address_valid_(false), is_data_size_valid_(false), | |
20e6d0d6 | 61 | is_offset_valid_(false), is_data_size_fixed_(false), |
22f0da72 | 62 | has_dynamic_reloc_(false) |
a2fb1b05 ILT |
63 | { } |
64 | ||
65 | virtual | |
66 | ~Output_data(); | |
67 | ||
27bc2bce ILT |
68 | // Return the address. For allocated sections, this is only valid |
69 | // after Layout::finalize is finished. | |
75f65a3e ILT |
70 | uint64_t |
71 | address() const | |
27bc2bce ILT |
72 | { |
73 | gold_assert(this->is_address_valid_); | |
74 | return this->address_; | |
75 | } | |
75f65a3e | 76 | |
27bc2bce ILT |
77 | // Return the size of the data. For allocated sections, this must |
78 | // be valid after Layout::finalize calls set_address, but need not | |
79 | // be valid before then. | |
a2fb1b05 | 80 | off_t |
75f65a3e | 81 | data_size() const |
27bc2bce ILT |
82 | { |
83 | gold_assert(this->is_data_size_valid_); | |
84 | return this->data_size_; | |
85 | } | |
75f65a3e | 86 | |
cdc29364 CC |
87 | // Get the current data size. |
88 | off_t | |
89 | current_data_size() const | |
90 | { return this->current_data_size_for_child(); } | |
91 | ||
20e6d0d6 DK |
92 | // Return true if data size is fixed. |
93 | bool | |
94 | is_data_size_fixed() const | |
95 | { return this->is_data_size_fixed_; } | |
34171bc5 | 96 | |
ead1e424 | 97 | // Return the file offset. This is only valid after |
27bc2bce ILT |
98 | // Layout::finalize is finished. For some non-allocated sections, |
99 | // it may not be valid until near the end of the link. | |
75f65a3e ILT |
100 | off_t |
101 | offset() const | |
27bc2bce ILT |
102 | { |
103 | gold_assert(this->is_offset_valid_); | |
104 | return this->offset_; | |
105 | } | |
75f65a3e | 106 | |
ec661b9d AM |
107 | // Reset the address, file offset and data size. This essentially |
108 | // disables the sanity testing about duplicate and unknown settings. | |
a445fddf ILT |
109 | void |
110 | reset_address_and_file_offset() | |
111 | { | |
112 | this->is_address_valid_ = false; | |
113 | this->is_offset_valid_ = false; | |
20e6d0d6 DK |
114 | if (!this->is_data_size_fixed_) |
115 | this->is_data_size_valid_ = false; | |
a445fddf ILT |
116 | this->do_reset_address_and_file_offset(); |
117 | } | |
118 | ||
ec661b9d AM |
119 | // As above, but just for data size. |
120 | void | |
121 | reset_data_size() | |
122 | { | |
123 | if (!this->is_data_size_fixed_) | |
124 | this->is_data_size_valid_ = false; | |
125 | } | |
126 | ||
20e6d0d6 DK |
127 | // Return true if address and file offset already have reset values. In |
128 | // other words, calling reset_address_and_file_offset will not change them. | |
129 | bool | |
130 | address_and_file_offset_have_reset_values() const | |
131 | { return this->do_address_and_file_offset_have_reset_values(); } | |
132 | ||
75f65a3e ILT |
133 | // Return the required alignment. |
134 | uint64_t | |
135 | addralign() const | |
136 | { return this->do_addralign(); } | |
137 | ||
a445fddf ILT |
138 | // Return whether this has a load address. |
139 | bool | |
140 | has_load_address() const | |
141 | { return this->do_has_load_address(); } | |
142 | ||
143 | // Return the load address. | |
144 | uint64_t | |
145 | load_address() const | |
146 | { return this->do_load_address(); } | |
147 | ||
75f65a3e ILT |
148 | // Return whether this is an Output_section. |
149 | bool | |
150 | is_section() const | |
151 | { return this->do_is_section(); } | |
152 | ||
153 | // Return whether this is an Output_section of the specified type. | |
154 | bool | |
155 | is_section_type(elfcpp::Elf_Word stt) const | |
156 | { return this->do_is_section_type(stt); } | |
157 | ||
158 | // Return whether this is an Output_section with the specified flag | |
159 | // set. | |
160 | bool | |
161 | is_section_flag_set(elfcpp::Elf_Xword shf) const | |
162 | { return this->do_is_section_flag_set(shf); } | |
163 | ||
77e65537 ILT |
164 | // Return the output section that this goes in, if there is one. |
165 | Output_section* | |
166 | output_section() | |
167 | { return this->do_output_section(); } | |
168 | ||
ea715a34 ILT |
169 | const Output_section* |
170 | output_section() const | |
171 | { return this->do_output_section(); } | |
172 | ||
ead1e424 ILT |
173 | // Return the output section index, if there is an output section. |
174 | unsigned int | |
175 | out_shndx() const | |
176 | { return this->do_out_shndx(); } | |
177 | ||
178 | // Set the output section index, if this is an output section. | |
179 | void | |
180 | set_out_shndx(unsigned int shndx) | |
181 | { this->do_set_out_shndx(shndx); } | |
182 | ||
27bc2bce ILT |
183 | // Set the address and file offset of this data, and finalize the |
184 | // size of the data. This is called during Layout::finalize for | |
185 | // allocated sections. | |
75f65a3e | 186 | void |
27bc2bce ILT |
187 | set_address_and_file_offset(uint64_t addr, off_t off) |
188 | { | |
189 | this->set_address(addr); | |
190 | this->set_file_offset(off); | |
191 | this->finalize_data_size(); | |
192 | } | |
193 | ||
194 | // Set the address. | |
195 | void | |
196 | set_address(uint64_t addr) | |
197 | { | |
198 | gold_assert(!this->is_address_valid_); | |
199 | this->address_ = addr; | |
200 | this->is_address_valid_ = true; | |
201 | } | |
202 | ||
203 | // Set the file offset. | |
204 | void | |
205 | set_file_offset(off_t off) | |
206 | { | |
207 | gold_assert(!this->is_offset_valid_); | |
208 | this->offset_ = off; | |
209 | this->is_offset_valid_ = true; | |
210 | } | |
211 | ||
cdc29364 CC |
212 | // Update the data size without finalizing it. |
213 | void | |
214 | pre_finalize_data_size() | |
215 | { | |
216 | if (!this->is_data_size_valid_) | |
217 | { | |
218 | // Tell the child class to update the data size. | |
219 | this->update_data_size(); | |
220 | } | |
221 | } | |
222 | ||
27bc2bce ILT |
223 | // Finalize the data size. |
224 | void | |
225 | finalize_data_size() | |
226 | { | |
227 | if (!this->is_data_size_valid_) | |
228 | { | |
229 | // Tell the child class to set the data size. | |
230 | this->set_final_data_size(); | |
231 | gold_assert(this->is_data_size_valid_); | |
232 | } | |
233 | } | |
75f65a3e | 234 | |
7bf1f802 ILT |
235 | // Set the TLS offset. Called only for SHT_TLS sections. |
236 | void | |
237 | set_tls_offset(uint64_t tls_base) | |
238 | { this->do_set_tls_offset(tls_base); } | |
239 | ||
240 | // Return the TLS offset, relative to the base of the TLS segment. | |
241 | // Valid only for SHT_TLS sections. | |
242 | uint64_t | |
243 | tls_offset() const | |
244 | { return this->do_tls_offset(); } | |
245 | ||
ead1e424 ILT |
246 | // Write the data to the output file. This is called after |
247 | // Layout::finalize is complete. | |
75f65a3e ILT |
248 | void |
249 | write(Output_file* file) | |
250 | { this->do_write(file); } | |
a2fb1b05 | 251 | |
27bc2bce ILT |
252 | // This is called by Layout::finalize to note that the sizes of |
253 | // allocated sections must now be fixed. | |
a3ad94ed ILT |
254 | static void |
255 | layout_complete() | |
27bc2bce | 256 | { Output_data::allocated_sizes_are_fixed = true; } |
a3ad94ed | 257 | |
730cdc88 ILT |
258 | // Used to check that layout has been done. |
259 | static bool | |
260 | is_layout_complete() | |
27bc2bce | 261 | { return Output_data::allocated_sizes_are_fixed; } |
730cdc88 | 262 | |
22f0da72 | 263 | // Note that a dynamic reloc has been applied to this data. |
4f4c5f80 ILT |
264 | void |
265 | add_dynamic_reloc() | |
22f0da72 | 266 | { this->has_dynamic_reloc_ = true; } |
4f4c5f80 | 267 | |
22f0da72 ILT |
268 | // Return whether a dynamic reloc has been applied. |
269 | bool | |
270 | has_dynamic_reloc() const | |
271 | { return this->has_dynamic_reloc_; } | |
4f4c5f80 | 272 | |
a9a60db6 ILT |
273 | // Whether the address is valid. |
274 | bool | |
275 | is_address_valid() const | |
276 | { return this->is_address_valid_; } | |
277 | ||
278 | // Whether the file offset is valid. | |
279 | bool | |
280 | is_offset_valid() const | |
281 | { return this->is_offset_valid_; } | |
282 | ||
283 | // Whether the data size is valid. | |
284 | bool | |
285 | is_data_size_valid() const | |
286 | { return this->is_data_size_valid_; } | |
287 | ||
7d9e3d98 ILT |
288 | // Print information to the map file. |
289 | void | |
290 | print_to_mapfile(Mapfile* mapfile) const | |
291 | { return this->do_print_to_mapfile(mapfile); } | |
292 | ||
75f65a3e ILT |
293 | protected: |
294 | // Functions that child classes may or in some cases must implement. | |
295 | ||
296 | // Write the data to the output file. | |
a2fb1b05 | 297 | virtual void |
75f65a3e ILT |
298 | do_write(Output_file*) = 0; |
299 | ||
300 | // Return the required alignment. | |
301 | virtual uint64_t | |
302 | do_addralign() const = 0; | |
303 | ||
a445fddf ILT |
304 | // Return whether this has a load address. |
305 | virtual bool | |
306 | do_has_load_address() const | |
307 | { return false; } | |
308 | ||
309 | // Return the load address. | |
310 | virtual uint64_t | |
311 | do_load_address() const | |
312 | { gold_unreachable(); } | |
313 | ||
75f65a3e ILT |
314 | // Return whether this is an Output_section. |
315 | virtual bool | |
316 | do_is_section() const | |
317 | { return false; } | |
a2fb1b05 | 318 | |
54dc6425 | 319 | // Return whether this is an Output_section of the specified type. |
75f65a3e | 320 | // This only needs to be implement by Output_section. |
54dc6425 | 321 | virtual bool |
75f65a3e | 322 | do_is_section_type(elfcpp::Elf_Word) const |
54dc6425 ILT |
323 | { return false; } |
324 | ||
75f65a3e ILT |
325 | // Return whether this is an Output_section with the specific flag |
326 | // set. This only needs to be implemented by Output_section. | |
54dc6425 | 327 | virtual bool |
75f65a3e | 328 | do_is_section_flag_set(elfcpp::Elf_Xword) const |
54dc6425 ILT |
329 | { return false; } |
330 | ||
77e65537 ILT |
331 | // Return the output section, if there is one. |
332 | virtual Output_section* | |
333 | do_output_section() | |
334 | { return NULL; } | |
335 | ||
ea715a34 ILT |
336 | virtual const Output_section* |
337 | do_output_section() const | |
338 | { return NULL; } | |
339 | ||
ead1e424 ILT |
340 | // Return the output section index, if there is an output section. |
341 | virtual unsigned int | |
342 | do_out_shndx() const | |
a3ad94ed | 343 | { gold_unreachable(); } |
ead1e424 ILT |
344 | |
345 | // Set the output section index, if this is an output section. | |
346 | virtual void | |
347 | do_set_out_shndx(unsigned int) | |
a3ad94ed | 348 | { gold_unreachable(); } |
ead1e424 | 349 | |
cdc29364 CC |
350 | // This is a hook for derived classes to set the preliminary data size. |
351 | // This is called by pre_finalize_data_size, normally called during | |
352 | // Layout::finalize, before the section address is set, and is used | |
353 | // during an incremental update, when we need to know the size of a | |
354 | // section before allocating space in the output file. For classes | |
355 | // where the current data size is up to date, this default version of | |
356 | // the method can be inherited. | |
357 | virtual void | |
358 | update_data_size() | |
359 | { } | |
360 | ||
27bc2bce ILT |
361 | // This is a hook for derived classes to set the data size. This is |
362 | // called by finalize_data_size, normally called during | |
363 | // Layout::finalize, when the section address is set. | |
75f65a3e | 364 | virtual void |
27bc2bce ILT |
365 | set_final_data_size() |
366 | { gold_unreachable(); } | |
75f65a3e | 367 | |
a445fddf ILT |
368 | // A hook for resetting the address and file offset. |
369 | virtual void | |
370 | do_reset_address_and_file_offset() | |
371 | { } | |
372 | ||
20e6d0d6 DK |
373 | // Return true if address and file offset already have reset values. In |
374 | // other words, calling reset_address_and_file_offset will not change them. | |
375 | // A child class overriding do_reset_address_and_file_offset may need to | |
376 | // also override this. | |
377 | virtual bool | |
378 | do_address_and_file_offset_have_reset_values() const | |
379 | { return !this->is_address_valid_ && !this->is_offset_valid_; } | |
380 | ||
7bf1f802 ILT |
381 | // Set the TLS offset. Called only for SHT_TLS sections. |
382 | virtual void | |
383 | do_set_tls_offset(uint64_t) | |
384 | { gold_unreachable(); } | |
385 | ||
386 | // Return the TLS offset, relative to the base of the TLS segment. | |
387 | // Valid only for SHT_TLS sections. | |
388 | virtual uint64_t | |
389 | do_tls_offset() const | |
390 | { gold_unreachable(); } | |
391 | ||
7d9e3d98 ILT |
392 | // Print to the map file. This only needs to be implemented by |
393 | // classes which may appear in a PT_LOAD segment. | |
394 | virtual void | |
395 | do_print_to_mapfile(Mapfile*) const | |
396 | { gold_unreachable(); } | |
397 | ||
75f65a3e ILT |
398 | // Functions that child classes may call. |
399 | ||
9c547ec3 ILT |
400 | // Reset the address. The Output_section class needs this when an |
401 | // SHF_ALLOC input section is added to an output section which was | |
402 | // formerly not SHF_ALLOC. | |
403 | void | |
404 | mark_address_invalid() | |
405 | { this->is_address_valid_ = false; } | |
406 | ||
a2fb1b05 ILT |
407 | // Set the size of the data. |
408 | void | |
2ea97941 | 409 | set_data_size(off_t data_size) |
a3ad94ed | 410 | { |
20e6d0d6 DK |
411 | gold_assert(!this->is_data_size_valid_ |
412 | && !this->is_data_size_fixed_); | |
2ea97941 | 413 | this->data_size_ = data_size; |
27bc2bce ILT |
414 | this->is_data_size_valid_ = true; |
415 | } | |
416 | ||
20e6d0d6 | 417 | // Fix the data size. Once it is fixed, it cannot be changed |
34171bc5 | 418 | // and the data size remains always valid. |
20e6d0d6 DK |
419 | void |
420 | fix_data_size() | |
421 | { | |
422 | gold_assert(this->is_data_size_valid_); | |
423 | this->is_data_size_fixed_ = true; | |
424 | } | |
425 | ||
27bc2bce ILT |
426 | // Get the current data size--this is for the convenience of |
427 | // sections which build up their size over time. | |
428 | off_t | |
429 | current_data_size_for_child() const | |
430 | { return this->data_size_; } | |
431 | ||
432 | // Set the current data size--this is for the convenience of | |
433 | // sections which build up their size over time. | |
434 | void | |
2ea97941 | 435 | set_current_data_size_for_child(off_t data_size) |
27bc2bce ILT |
436 | { |
437 | gold_assert(!this->is_data_size_valid_); | |
2ea97941 | 438 | this->data_size_ = data_size; |
a3ad94ed | 439 | } |
75f65a3e | 440 | |
730cdc88 ILT |
441 | // Return default alignment for the target size. |
442 | static uint64_t | |
443 | default_alignment(); | |
444 | ||
445 | // Return default alignment for a specified size--32 or 64. | |
75f65a3e | 446 | static uint64_t |
730cdc88 | 447 | default_alignment_for_size(int size); |
a2fb1b05 ILT |
448 | |
449 | private: | |
450 | Output_data(const Output_data&); | |
451 | Output_data& operator=(const Output_data&); | |
452 | ||
a3ad94ed | 453 | // This is used for verification, to make sure that we don't try to |
27bc2bce ILT |
454 | // change any sizes of allocated sections after we set the section |
455 | // addresses. | |
456 | static bool allocated_sizes_are_fixed; | |
a3ad94ed | 457 | |
27bc2bce | 458 | // Memory address in output file. |
75f65a3e | 459 | uint64_t address_; |
27bc2bce | 460 | // Size of data in output file. |
75f65a3e | 461 | off_t data_size_; |
27bc2bce | 462 | // File offset of contents in output file. |
75f65a3e | 463 | off_t offset_; |
27bc2bce | 464 | // Whether address_ is valid. |
22f0da72 | 465 | bool is_address_valid_ : 1; |
27bc2bce | 466 | // Whether data_size_ is valid. |
22f0da72 | 467 | bool is_data_size_valid_ : 1; |
27bc2bce | 468 | // Whether offset_ is valid. |
22f0da72 | 469 | bool is_offset_valid_ : 1; |
20e6d0d6 | 470 | // Whether data size is fixed. |
22f0da72 ILT |
471 | bool is_data_size_fixed_ : 1; |
472 | // Whether any dynamic relocs have been applied to this section. | |
473 | bool has_dynamic_reloc_ : 1; | |
a2fb1b05 ILT |
474 | }; |
475 | ||
54dc6425 ILT |
476 | // Output the section headers. |
477 | ||
478 | class Output_section_headers : public Output_data | |
479 | { | |
480 | public: | |
9025d29d | 481 | Output_section_headers(const Layout*, |
16649710 ILT |
482 | const Layout::Segment_list*, |
483 | const Layout::Section_list*, | |
6a74a719 | 484 | const Layout::Section_list*, |
d491d34e ILT |
485 | const Stringpool*, |
486 | const Output_section*); | |
54dc6425 | 487 | |
27bc2bce | 488 | protected: |
54dc6425 ILT |
489 | // Write the data to the file. |
490 | void | |
75f65a3e ILT |
491 | do_write(Output_file*); |
492 | ||
493 | // Return the required alignment. | |
494 | uint64_t | |
495 | do_addralign() const | |
730cdc88 | 496 | { return Output_data::default_alignment(); } |
54dc6425 | 497 | |
7d9e3d98 ILT |
498 | // Write to a map file. |
499 | void | |
500 | do_print_to_mapfile(Mapfile* mapfile) const | |
501 | { mapfile->print_output_data(this, _("** section headers")); } | |
502 | ||
cdc29364 CC |
503 | // Update the data size. |
504 | void | |
505 | update_data_size() | |
506 | { this->set_data_size(this->do_size()); } | |
507 | ||
20e6d0d6 DK |
508 | // Set final data size. |
509 | void | |
510 | set_final_data_size() | |
511 | { this->set_data_size(this->do_size()); } | |
512 | ||
54dc6425 | 513 | private: |
61ba1cf9 ILT |
514 | // Write the data to the file with the right size and endianness. |
515 | template<int size, bool big_endian> | |
516 | void | |
517 | do_sized_write(Output_file*); | |
518 | ||
20e6d0d6 DK |
519 | // Compute data size. |
520 | off_t | |
521 | do_size() const; | |
522 | ||
16649710 ILT |
523 | const Layout* layout_; |
524 | const Layout::Segment_list* segment_list_; | |
6a74a719 | 525 | const Layout::Section_list* section_list_; |
16649710 | 526 | const Layout::Section_list* unattached_section_list_; |
61ba1cf9 | 527 | const Stringpool* secnamepool_; |
d491d34e | 528 | const Output_section* shstrtab_section_; |
54dc6425 ILT |
529 | }; |
530 | ||
531 | // Output the segment headers. | |
532 | ||
533 | class Output_segment_headers : public Output_data | |
534 | { | |
535 | public: | |
9025d29d | 536 | Output_segment_headers(const Layout::Segment_list& segment_list); |
54dc6425 | 537 | |
27bc2bce | 538 | protected: |
54dc6425 ILT |
539 | // Write the data to the file. |
540 | void | |
75f65a3e ILT |
541 | do_write(Output_file*); |
542 | ||
543 | // Return the required alignment. | |
544 | uint64_t | |
545 | do_addralign() const | |
730cdc88 | 546 | { return Output_data::default_alignment(); } |
54dc6425 | 547 | |
7d9e3d98 ILT |
548 | // Write to a map file. |
549 | void | |
550 | do_print_to_mapfile(Mapfile* mapfile) const | |
551 | { mapfile->print_output_data(this, _("** segment headers")); } | |
552 | ||
20e6d0d6 DK |
553 | // Set final data size. |
554 | void | |
555 | set_final_data_size() | |
556 | { this->set_data_size(this->do_size()); } | |
557 | ||
54dc6425 | 558 | private: |
61ba1cf9 ILT |
559 | // Write the data to the file with the right size and endianness. |
560 | template<int size, bool big_endian> | |
561 | void | |
562 | do_sized_write(Output_file*); | |
563 | ||
20e6d0d6 DK |
564 | // Compute the current size. |
565 | off_t | |
566 | do_size() const; | |
567 | ||
54dc6425 ILT |
568 | const Layout::Segment_list& segment_list_; |
569 | }; | |
570 | ||
571 | // Output the ELF file header. | |
572 | ||
573 | class Output_file_header : public Output_data | |
574 | { | |
575 | public: | |
cc84c10b | 576 | Output_file_header(Target*, |
54dc6425 | 577 | const Symbol_table*, |
a10ae760 | 578 | const Output_segment_headers*); |
75f65a3e ILT |
579 | |
580 | // Add information about the section headers. We lay out the ELF | |
581 | // file header before we create the section headers. | |
582 | void set_section_info(const Output_section_headers*, | |
583 | const Output_section* shstrtab); | |
54dc6425 | 584 | |
27bc2bce | 585 | protected: |
54dc6425 ILT |
586 | // Write the data to the file. |
587 | void | |
75f65a3e ILT |
588 | do_write(Output_file*); |
589 | ||
590 | // Return the required alignment. | |
591 | uint64_t | |
592 | do_addralign() const | |
730cdc88 | 593 | { return Output_data::default_alignment(); } |
75f65a3e | 594 | |
7d9e3d98 ILT |
595 | // Write to a map file. |
596 | void | |
597 | do_print_to_mapfile(Mapfile* mapfile) const | |
598 | { mapfile->print_output_data(this, _("** file header")); } | |
599 | ||
20e6d0d6 DK |
600 | // Set final data size. |
601 | void | |
602 | set_final_data_size(void) | |
603 | { this->set_data_size(this->do_size()); } | |
604 | ||
54dc6425 | 605 | private: |
61ba1cf9 ILT |
606 | // Write the data to the file with the right size and endianness. |
607 | template<int size, bool big_endian> | |
608 | void | |
609 | do_sized_write(Output_file*); | |
610 | ||
d391083d ILT |
611 | // Return the value to use for the entry address. |
612 | template<int size> | |
613 | typename elfcpp::Elf_types<size>::Elf_Addr | |
614 | entry(); | |
615 | ||
20e6d0d6 DK |
616 | // Compute the current data size. |
617 | off_t | |
618 | do_size() const; | |
619 | ||
cc84c10b | 620 | Target* target_; |
54dc6425 | 621 | const Symbol_table* symtab_; |
61ba1cf9 | 622 | const Output_segment_headers* segment_header_; |
54dc6425 ILT |
623 | const Output_section_headers* section_header_; |
624 | const Output_section* shstrtab_; | |
625 | }; | |
626 | ||
ead1e424 ILT |
627 | // Output sections are mainly comprised of input sections. However, |
628 | // there are cases where we have data to write out which is not in an | |
629 | // input section. Output_section_data is used in such cases. This is | |
630 | // an abstract base class. | |
631 | ||
632 | class Output_section_data : public Output_data | |
633 | { | |
634 | public: | |
2ea97941 ILT |
635 | Output_section_data(off_t data_size, uint64_t addralign, |
636 | bool is_data_size_fixed) | |
637 | : Output_data(), output_section_(NULL), addralign_(addralign) | |
20e6d0d6 | 638 | { |
2ea97941 ILT |
639 | this->set_data_size(data_size); |
640 | if (is_data_size_fixed) | |
20e6d0d6 DK |
641 | this->fix_data_size(); |
642 | } | |
ead1e424 | 643 | |
2ea97941 ILT |
644 | Output_section_data(uint64_t addralign) |
645 | : Output_data(), output_section_(NULL), addralign_(addralign) | |
ead1e424 ILT |
646 | { } |
647 | ||
16649710 | 648 | // Return the output section. |
7223e9ca ILT |
649 | Output_section* |
650 | output_section() | |
651 | { return this->output_section_; } | |
652 | ||
16649710 ILT |
653 | const Output_section* |
654 | output_section() const | |
655 | { return this->output_section_; } | |
656 | ||
ead1e424 ILT |
657 | // Record the output section. |
658 | void | |
16649710 | 659 | set_output_section(Output_section* os); |
ead1e424 | 660 | |
b8e6aad9 ILT |
661 | // Add an input section, for SHF_MERGE sections. This returns true |
662 | // if the section was handled. | |
663 | bool | |
664 | add_input_section(Relobj* object, unsigned int shndx) | |
665 | { return this->do_add_input_section(object, shndx); } | |
666 | ||
667 | // Given an input OBJECT, an input section index SHNDX within that | |
668 | // object, and an OFFSET relative to the start of that input | |
730cdc88 ILT |
669 | // section, return whether or not the corresponding offset within |
670 | // the output section is known. If this function returns true, it | |
671 | // sets *POUTPUT to the output offset. The value -1 indicates that | |
672 | // this input offset is being discarded. | |
8f00aeb8 | 673 | bool |
8383303e | 674 | output_offset(const Relobj* object, unsigned int shndx, |
2ea97941 | 675 | section_offset_type offset, |
ca09d69a | 676 | section_offset_type* poutput) const |
2ea97941 | 677 | { return this->do_output_offset(object, shndx, offset, poutput); } |
b8e6aad9 | 678 | |
a9a60db6 ILT |
679 | // Return whether this is the merge section for the input section |
680 | // SHNDX in OBJECT. This should return true when output_offset | |
681 | // would return true for some values of OFFSET. | |
682 | bool | |
683 | is_merge_section_for(const Relobj* object, unsigned int shndx) const | |
684 | { return this->do_is_merge_section_for(object, shndx); } | |
685 | ||
96803768 ILT |
686 | // Write the contents to a buffer. This is used for sections which |
687 | // require postprocessing, such as compression. | |
688 | void | |
689 | write_to_buffer(unsigned char* buffer) | |
690 | { this->do_write_to_buffer(buffer); } | |
691 | ||
38c5e8b4 ILT |
692 | // Print merge stats to stderr. This should only be called for |
693 | // SHF_MERGE sections. | |
694 | void | |
695 | print_merge_stats(const char* section_name) | |
696 | { this->do_print_merge_stats(section_name); } | |
697 | ||
ead1e424 ILT |
698 | protected: |
699 | // The child class must implement do_write. | |
700 | ||
16649710 ILT |
701 | // The child class may implement specific adjustments to the output |
702 | // section. | |
703 | virtual void | |
704 | do_adjust_output_section(Output_section*) | |
705 | { } | |
706 | ||
b8e6aad9 ILT |
707 | // May be implemented by child class. Return true if the section |
708 | // was handled. | |
709 | virtual bool | |
710 | do_add_input_section(Relobj*, unsigned int) | |
711 | { gold_unreachable(); } | |
712 | ||
730cdc88 | 713 | // The child class may implement output_offset. |
b8e6aad9 | 714 | virtual bool |
8383303e ILT |
715 | do_output_offset(const Relobj*, unsigned int, section_offset_type, |
716 | section_offset_type*) const | |
b8e6aad9 ILT |
717 | { return false; } |
718 | ||
a9a60db6 ILT |
719 | // The child class may implement is_merge_section_for. |
720 | virtual bool | |
721 | do_is_merge_section_for(const Relobj*, unsigned int) const | |
722 | { return false; } | |
723 | ||
96803768 ILT |
724 | // The child class may implement write_to_buffer. Most child |
725 | // classes can not appear in a compressed section, and they do not | |
726 | // implement this. | |
727 | virtual void | |
728 | do_write_to_buffer(unsigned char*) | |
729 | { gold_unreachable(); } | |
730 | ||
38c5e8b4 ILT |
731 | // Print merge statistics. |
732 | virtual void | |
733 | do_print_merge_stats(const char*) | |
734 | { gold_unreachable(); } | |
735 | ||
ead1e424 ILT |
736 | // Return the required alignment. |
737 | uint64_t | |
738 | do_addralign() const | |
739 | { return this->addralign_; } | |
740 | ||
77e65537 ILT |
741 | // Return the output section. |
742 | Output_section* | |
743 | do_output_section() | |
744 | { return this->output_section_; } | |
745 | ||
ea715a34 ILT |
746 | const Output_section* |
747 | do_output_section() const | |
748 | { return this->output_section_; } | |
749 | ||
ead1e424 ILT |
750 | // Return the section index of the output section. |
751 | unsigned int | |
752 | do_out_shndx() const; | |
753 | ||
5a6f7e2d ILT |
754 | // Set the alignment. |
755 | void | |
759b1a24 | 756 | set_addralign(uint64_t addralign); |
5a6f7e2d | 757 | |
ead1e424 ILT |
758 | private: |
759 | // The output section for this section. | |
77e65537 | 760 | Output_section* output_section_; |
ead1e424 ILT |
761 | // The required alignment. |
762 | uint64_t addralign_; | |
763 | }; | |
764 | ||
27bc2bce ILT |
765 | // Some Output_section_data classes build up their data step by step, |
766 | // rather than all at once. This class provides an interface for | |
767 | // them. | |
768 | ||
769 | class Output_section_data_build : public Output_section_data | |
770 | { | |
771 | public: | |
2ea97941 ILT |
772 | Output_section_data_build(uint64_t addralign) |
773 | : Output_section_data(addralign) | |
27bc2bce ILT |
774 | { } |
775 | ||
4829d394 CC |
776 | Output_section_data_build(off_t data_size, uint64_t addralign) |
777 | : Output_section_data(data_size, addralign, false) | |
778 | { } | |
779 | ||
27bc2bce ILT |
780 | // Set the current data size. |
781 | void | |
2ea97941 ILT |
782 | set_current_data_size(off_t data_size) |
783 | { this->set_current_data_size_for_child(data_size); } | |
27bc2bce ILT |
784 | |
785 | protected: | |
786 | // Set the final data size. | |
787 | virtual void | |
788 | set_final_data_size() | |
789 | { this->set_data_size(this->current_data_size_for_child()); } | |
790 | }; | |
791 | ||
dbe717ef ILT |
792 | // A simple case of Output_data in which we have constant data to |
793 | // output. | |
ead1e424 | 794 | |
dbe717ef | 795 | class Output_data_const : public Output_section_data |
ead1e424 ILT |
796 | { |
797 | public: | |
2ea97941 ILT |
798 | Output_data_const(const std::string& data, uint64_t addralign) |
799 | : Output_section_data(data.size(), addralign, true), data_(data) | |
dbe717ef ILT |
800 | { } |
801 | ||
2ea97941 ILT |
802 | Output_data_const(const char* p, off_t len, uint64_t addralign) |
803 | : Output_section_data(len, addralign, true), data_(p, len) | |
dbe717ef ILT |
804 | { } |
805 | ||
2ea97941 ILT |
806 | Output_data_const(const unsigned char* p, off_t len, uint64_t addralign) |
807 | : Output_section_data(len, addralign, true), | |
dbe717ef ILT |
808 | data_(reinterpret_cast<const char*>(p), len) |
809 | { } | |
810 | ||
27bc2bce | 811 | protected: |
a3ad94ed | 812 | // Write the data to the output file. |
dbe717ef | 813 | void |
a3ad94ed | 814 | do_write(Output_file*); |
dbe717ef | 815 | |
96803768 ILT |
816 | // Write the data to a buffer. |
817 | void | |
818 | do_write_to_buffer(unsigned char* buffer) | |
819 | { memcpy(buffer, this->data_.data(), this->data_.size()); } | |
820 | ||
7d9e3d98 ILT |
821 | // Write to a map file. |
822 | void | |
823 | do_print_to_mapfile(Mapfile* mapfile) const | |
824 | { mapfile->print_output_data(this, _("** fill")); } | |
825 | ||
dbe717ef ILT |
826 | private: |
827 | std::string data_; | |
828 | }; | |
829 | ||
a3ad94ed ILT |
830 | // Another version of Output_data with constant data, in which the |
831 | // buffer is allocated by the caller. | |
dbe717ef | 832 | |
a3ad94ed | 833 | class Output_data_const_buffer : public Output_section_data |
dbe717ef ILT |
834 | { |
835 | public: | |
a3ad94ed | 836 | Output_data_const_buffer(const unsigned char* p, off_t len, |
2ea97941 ILT |
837 | uint64_t addralign, const char* map_name) |
838 | : Output_section_data(len, addralign, true), | |
7d9e3d98 | 839 | p_(p), map_name_(map_name) |
a3ad94ed ILT |
840 | { } |
841 | ||
27bc2bce | 842 | protected: |
a3ad94ed ILT |
843 | // Write the data the output file. |
844 | void | |
845 | do_write(Output_file*); | |
846 | ||
96803768 ILT |
847 | // Write the data to a buffer. |
848 | void | |
849 | do_write_to_buffer(unsigned char* buffer) | |
850 | { memcpy(buffer, this->p_, this->data_size()); } | |
851 | ||
7d9e3d98 ILT |
852 | // Write to a map file. |
853 | void | |
854 | do_print_to_mapfile(Mapfile* mapfile) const | |
855 | { mapfile->print_output_data(this, _(this->map_name_)); } | |
856 | ||
a3ad94ed | 857 | private: |
7d9e3d98 | 858 | // The data to output. |
a3ad94ed | 859 | const unsigned char* p_; |
7d9e3d98 ILT |
860 | // Name to use in a map file. Maps are a rarely used feature, but |
861 | // the space usage is minor as aren't very many of these objects. | |
862 | const char* map_name_; | |
a3ad94ed ILT |
863 | }; |
864 | ||
27bc2bce ILT |
865 | // A place holder for a fixed amount of data written out via some |
866 | // other mechanism. | |
a3ad94ed | 867 | |
27bc2bce | 868 | class Output_data_fixed_space : public Output_section_data |
a3ad94ed ILT |
869 | { |
870 | public: | |
2ea97941 | 871 | Output_data_fixed_space(off_t data_size, uint64_t addralign, |
7d9e3d98 | 872 | const char* map_name) |
2ea97941 | 873 | : Output_section_data(data_size, addralign, true), |
7d9e3d98 | 874 | map_name_(map_name) |
a3ad94ed ILT |
875 | { } |
876 | ||
27bc2bce ILT |
877 | protected: |
878 | // Write out the data--the actual data must be written out | |
879 | // elsewhere. | |
880 | void | |
881 | do_write(Output_file*) | |
ead1e424 | 882 | { } |
7d9e3d98 ILT |
883 | |
884 | // Write to a map file. | |
885 | void | |
886 | do_print_to_mapfile(Mapfile* mapfile) const | |
887 | { mapfile->print_output_data(this, _(this->map_name_)); } | |
888 | ||
889 | private: | |
890 | // Name to use in a map file. Maps are a rarely used feature, but | |
891 | // the space usage is minor as aren't very many of these objects. | |
892 | const char* map_name_; | |
27bc2bce | 893 | }; |
ead1e424 | 894 | |
27bc2bce ILT |
895 | // A place holder for variable sized data written out via some other |
896 | // mechanism. | |
897 | ||
898 | class Output_data_space : public Output_section_data_build | |
899 | { | |
900 | public: | |
2ea97941 ILT |
901 | explicit Output_data_space(uint64_t addralign, const char* map_name) |
902 | : Output_section_data_build(addralign), | |
7d9e3d98 | 903 | map_name_(map_name) |
27bc2bce | 904 | { } |
ead1e424 | 905 | |
4829d394 CC |
906 | explicit Output_data_space(off_t data_size, uint64_t addralign, |
907 | const char* map_name) | |
908 | : Output_section_data_build(data_size, addralign), | |
909 | map_name_(map_name) | |
910 | { } | |
911 | ||
5a6f7e2d ILT |
912 | // Set the alignment. |
913 | void | |
914 | set_space_alignment(uint64_t align) | |
915 | { this->set_addralign(align); } | |
916 | ||
27bc2bce ILT |
917 | protected: |
918 | // Write out the data--the actual data must be written out | |
919 | // elsewhere. | |
ead1e424 ILT |
920 | void |
921 | do_write(Output_file*) | |
922 | { } | |
7d9e3d98 ILT |
923 | |
924 | // Write to a map file. | |
925 | void | |
926 | do_print_to_mapfile(Mapfile* mapfile) const | |
927 | { mapfile->print_output_data(this, _(this->map_name_)); } | |
928 | ||
929 | private: | |
930 | // Name to use in a map file. Maps are a rarely used feature, but | |
931 | // the space usage is minor as aren't very many of these objects. | |
932 | const char* map_name_; | |
933 | }; | |
934 | ||
935 | // Fill fixed space with zeroes. This is just like | |
936 | // Output_data_fixed_space, except that the map name is known. | |
937 | ||
938 | class Output_data_zero_fill : public Output_section_data | |
939 | { | |
940 | public: | |
2ea97941 ILT |
941 | Output_data_zero_fill(off_t data_size, uint64_t addralign) |
942 | : Output_section_data(data_size, addralign, true) | |
7d9e3d98 ILT |
943 | { } |
944 | ||
945 | protected: | |
946 | // There is no data to write out. | |
947 | void | |
948 | do_write(Output_file*) | |
949 | { } | |
950 | ||
951 | // Write to a map file. | |
952 | void | |
953 | do_print_to_mapfile(Mapfile* mapfile) const | |
954 | { mapfile->print_output_data(this, "** zero fill"); } | |
ead1e424 ILT |
955 | }; |
956 | ||
a3ad94ed ILT |
957 | // A string table which goes into an output section. |
958 | ||
959 | class Output_data_strtab : public Output_section_data | |
960 | { | |
961 | public: | |
962 | Output_data_strtab(Stringpool* strtab) | |
963 | : Output_section_data(1), strtab_(strtab) | |
964 | { } | |
965 | ||
27bc2bce | 966 | protected: |
cdc29364 CC |
967 | // This is called to update the section size prior to assigning |
968 | // the address and file offset. | |
969 | void | |
970 | update_data_size() | |
971 | { this->set_final_data_size(); } | |
972 | ||
a3ad94ed ILT |
973 | // This is called to set the address and file offset. Here we make |
974 | // sure that the Stringpool is finalized. | |
975 | void | |
27bc2bce | 976 | set_final_data_size(); |
a3ad94ed ILT |
977 | |
978 | // Write out the data. | |
979 | void | |
980 | do_write(Output_file*); | |
981 | ||
96803768 ILT |
982 | // Write the data to a buffer. |
983 | void | |
984 | do_write_to_buffer(unsigned char* buffer) | |
985 | { this->strtab_->write_to_buffer(buffer, this->data_size()); } | |
986 | ||
7d9e3d98 ILT |
987 | // Write to a map file. |
988 | void | |
989 | do_print_to_mapfile(Mapfile* mapfile) const | |
990 | { mapfile->print_output_data(this, _("** string table")); } | |
991 | ||
a3ad94ed ILT |
992 | private: |
993 | Stringpool* strtab_; | |
994 | }; | |
995 | ||
c06b7b0b ILT |
996 | // This POD class is used to represent a single reloc in the output |
997 | // file. This could be a private class within Output_data_reloc, but | |
998 | // the templatization is complex enough that I broke it out into a | |
999 | // separate class. The class is templatized on either elfcpp::SHT_REL | |
1000 | // or elfcpp::SHT_RELA, and also on whether this is a dynamic | |
1001 | // relocation or an ordinary relocation. | |
1002 | ||
dceae3c1 ILT |
1003 | // A relocation can be against a global symbol, a local symbol, a |
1004 | // local section symbol, an output section, or the undefined symbol at | |
1005 | // index 0. We represent the latter by using a NULL global symbol. | |
c06b7b0b ILT |
1006 | |
1007 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
1008 | class Output_reloc; | |
1009 | ||
1010 | template<bool dynamic, int size, bool big_endian> | |
1011 | class Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> | |
1012 | { | |
1013 | public: | |
1014 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
624f8810 | 1015 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend; |
c06b7b0b | 1016 | |
eff45813 CC |
1017 | static const Address invalid_address = static_cast<Address>(0) - 1; |
1018 | ||
c06b7b0b ILT |
1019 | // An uninitialized entry. We need this because we want to put |
1020 | // instances of this class into an STL container. | |
1021 | Output_reloc() | |
1022 | : local_sym_index_(INVALID_CODE) | |
1023 | { } | |
1024 | ||
dceae3c1 ILT |
1025 | // We have a bunch of different constructors. They come in pairs |
1026 | // depending on how the address of the relocation is specified. It | |
1027 | // can either be an offset in an Output_data or an offset in an | |
1028 | // input section. | |
1029 | ||
c06b7b0b | 1030 | // A reloc against a global symbol. |
5a6f7e2d | 1031 | |
a3ad94ed | 1032 | Output_reloc(Symbol* gsym, unsigned int type, Output_data* od, |
13cf9988 DM |
1033 | Address address, bool is_relative, bool is_symbolless, |
1034 | bool use_plt_offset); | |
5a6f7e2d | 1035 | |
ef9beddf | 1036 | Output_reloc(Symbol* gsym, unsigned int type, |
34171bc5 | 1037 | Sized_relobj<size, big_endian>* relobj, |
0da6fa6c | 1038 | unsigned int shndx, Address address, bool is_relative, |
13cf9988 | 1039 | bool is_symbolless, bool use_plt_offset); |
c06b7b0b | 1040 | |
dceae3c1 | 1041 | // A reloc against a local symbol or local section symbol. |
5a6f7e2d ILT |
1042 | |
1043 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
7bf1f802 | 1044 | unsigned int local_sym_index, unsigned int type, |
dceae3c1 | 1045 | Output_data* od, Address address, bool is_relative, |
34171bc5 AM |
1046 | bool is_symbolless, bool is_section_symbol, |
1047 | bool use_plt_offset); | |
5a6f7e2d ILT |
1048 | |
1049 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
7bf1f802 | 1050 | unsigned int local_sym_index, unsigned int type, |
dceae3c1 | 1051 | unsigned int shndx, Address address, bool is_relative, |
34171bc5 AM |
1052 | bool is_symbolless, bool is_section_symbol, |
1053 | bool use_plt_offset); | |
c06b7b0b ILT |
1054 | |
1055 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 1056 | |
a3ad94ed | 1057 | Output_reloc(Output_section* os, unsigned int type, Output_data* od, |
703d02da | 1058 | Address address, bool is_relative); |
5a6f7e2d | 1059 | |
ef9beddf | 1060 | Output_reloc(Output_section* os, unsigned int type, |
703d02da AM |
1061 | Sized_relobj<size, big_endian>* relobj, unsigned int shndx, |
1062 | Address address, bool is_relative); | |
c06b7b0b | 1063 | |
ec661b9d | 1064 | // An absolute or relative relocation with no symbol. |
e291e7b9 | 1065 | |
ec661b9d AM |
1066 | Output_reloc(unsigned int type, Output_data* od, Address address, |
1067 | bool is_relative); | |
e291e7b9 ILT |
1068 | |
1069 | Output_reloc(unsigned int type, Sized_relobj<size, big_endian>* relobj, | |
ec661b9d | 1070 | unsigned int shndx, Address address, bool is_relative); |
e291e7b9 ILT |
1071 | |
1072 | // A target specific relocation. The target will be called to get | |
1073 | // the symbol index, passing ARG. The type and offset will be set | |
1074 | // as for other relocation types. | |
1075 | ||
1076 | Output_reloc(unsigned int type, void* arg, Output_data* od, | |
1077 | Address address); | |
1078 | ||
1079 | Output_reloc(unsigned int type, void* arg, | |
1080 | Sized_relobj<size, big_endian>* relobj, | |
1081 | unsigned int shndx, Address address); | |
1082 | ||
1083 | // Return the reloc type. | |
1084 | unsigned int | |
1085 | type() const | |
1086 | { return this->type_; } | |
1087 | ||
1088 | // Return whether this is a RELATIVE relocation. | |
e8c846c3 ILT |
1089 | bool |
1090 | is_relative() const | |
1091 | { return this->is_relative_; } | |
1092 | ||
0da6fa6c DM |
1093 | // Return whether this is a relocation which should not use |
1094 | // a symbol, but which obtains its addend from a symbol. | |
1095 | bool | |
1096 | is_symbolless() const | |
1097 | { return this->is_symbolless_; } | |
1098 | ||
dceae3c1 ILT |
1099 | // Return whether this is against a local section symbol. |
1100 | bool | |
1101 | is_local_section_symbol() const | |
1102 | { | |
1103 | return (this->local_sym_index_ != GSYM_CODE | |
34171bc5 AM |
1104 | && this->local_sym_index_ != SECTION_CODE |
1105 | && this->local_sym_index_ != INVALID_CODE | |
e291e7b9 | 1106 | && this->local_sym_index_ != TARGET_CODE |
34171bc5 | 1107 | && this->is_section_symbol_); |
dceae3c1 ILT |
1108 | } |
1109 | ||
e291e7b9 ILT |
1110 | // Return whether this is a target specific relocation. |
1111 | bool | |
1112 | is_target_specific() const | |
1113 | { return this->local_sym_index_ == TARGET_CODE; } | |
1114 | ||
1115 | // Return the argument to pass to the target for a target specific | |
1116 | // relocation. | |
1117 | void* | |
1118 | target_arg() const | |
1119 | { | |
1120 | gold_assert(this->local_sym_index_ == TARGET_CODE); | |
1121 | return this->u1_.arg; | |
1122 | } | |
1123 | ||
dceae3c1 | 1124 | // For a local section symbol, return the offset of the input |
624f8810 ILT |
1125 | // section within the output section. ADDEND is the addend being |
1126 | // applied to the input section. | |
ef9beddf | 1127 | Address |
624f8810 | 1128 | local_section_offset(Addend addend) const; |
dceae3c1 | 1129 | |
d1f003c6 ILT |
1130 | // Get the value of the symbol referred to by a Rel relocation when |
1131 | // we are adding the given ADDEND. | |
e8c846c3 | 1132 | Address |
624f8810 | 1133 | symbol_value(Addend addend) const; |
e8c846c3 | 1134 | |
6fa2a40b CC |
1135 | // If this relocation is against an input section, return the |
1136 | // relocatable object containing the input section. | |
1137 | Sized_relobj<size, big_endian>* | |
1138 | get_relobj() const | |
1139 | { | |
1140 | if (this->shndx_ == INVALID_CODE) | |
1141 | return NULL; | |
1142 | return this->u2_.relobj; | |
1143 | } | |
1144 | ||
c06b7b0b ILT |
1145 | // Write the reloc entry to an output view. |
1146 | void | |
1147 | write(unsigned char* pov) const; | |
1148 | ||
1149 | // Write the offset and info fields to Write_rel. | |
1150 | template<typename Write_rel> | |
1151 | void write_rel(Write_rel*) const; | |
1152 | ||
d98bc257 ILT |
1153 | // This is used when sorting dynamic relocs. Return -1 to sort this |
1154 | // reloc before R2, 0 to sort the same as R2, 1 to sort after R2. | |
1155 | int | |
1156 | compare(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& r2) | |
1157 | const; | |
1158 | ||
1159 | // Return whether this reloc should be sorted before the argument | |
1160 | // when sorting dynamic relocs. | |
1161 | bool | |
1162 | sort_before(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& | |
1163 | r2) const | |
1164 | { return this->compare(r2) < 0; } | |
1165 | ||
c06b7b0b | 1166 | private: |
dceae3c1 ILT |
1167 | // Record that we need a dynamic symbol index. |
1168 | void | |
1169 | set_needs_dynsym_index(); | |
1170 | ||
1171 | // Return the symbol index. | |
c06b7b0b ILT |
1172 | unsigned int |
1173 | get_symbol_index() const; | |
1174 | ||
d98bc257 | 1175 | // Return the output address. |
a984ee1d | 1176 | Address |
d98bc257 ILT |
1177 | get_address() const; |
1178 | ||
c06b7b0b ILT |
1179 | // Codes for local_sym_index_. |
1180 | enum | |
1181 | { | |
1182 | // Global symbol. | |
1183 | GSYM_CODE = -1U, | |
1184 | // Output section. | |
1185 | SECTION_CODE = -2U, | |
e291e7b9 ILT |
1186 | // Target specific. |
1187 | TARGET_CODE = -3U, | |
c06b7b0b | 1188 | // Invalid uninitialized entry. |
e291e7b9 | 1189 | INVALID_CODE = -4U |
c06b7b0b ILT |
1190 | }; |
1191 | ||
1192 | union | |
1193 | { | |
dceae3c1 ILT |
1194 | // For a local symbol or local section symbol |
1195 | // (this->local_sym_index_ >= 0), the object. We will never | |
1196 | // generate a relocation against a local symbol in a dynamic | |
1197 | // object; that doesn't make sense. And our callers will always | |
1198 | // be templatized, so we use Sized_relobj here. | |
5a6f7e2d | 1199 | Sized_relobj<size, big_endian>* relobj; |
dceae3c1 ILT |
1200 | // For a global symbol (this->local_sym_index_ == GSYM_CODE, the |
1201 | // symbol. If this is NULL, it indicates a relocation against the | |
1202 | // undefined 0 symbol. | |
c06b7b0b | 1203 | Symbol* gsym; |
dceae3c1 ILT |
1204 | // For a relocation against an output section |
1205 | // (this->local_sym_index_ == SECTION_CODE), the output section. | |
c06b7b0b | 1206 | Output_section* os; |
e291e7b9 ILT |
1207 | // For a target specific relocation, an argument to pass to the |
1208 | // target. | |
1209 | void* arg; | |
5a6f7e2d ILT |
1210 | } u1_; |
1211 | union | |
1212 | { | |
dceae3c1 ILT |
1213 | // If this->shndx_ is not INVALID CODE, the object which holds the |
1214 | // input section being used to specify the reloc address. | |
ef9beddf | 1215 | Sized_relobj<size, big_endian>* relobj; |
dceae3c1 | 1216 | // If this->shndx_ is INVALID_CODE, the output data being used to |
5a6f7e2d ILT |
1217 | // specify the reloc address. This may be NULL if the reloc |
1218 | // address is absolute. | |
1219 | Output_data* od; | |
1220 | } u2_; | |
1221 | // The address offset within the input section or the Output_data. | |
1222 | Address address_; | |
dceae3c1 | 1223 | // This is GSYM_CODE for a global symbol, or SECTION_CODE for a |
e291e7b9 ILT |
1224 | // relocation against an output section, or TARGET_CODE for a target |
1225 | // specific relocation, or INVALID_CODE for an uninitialized value. | |
1226 | // Otherwise, for a local symbol (this->is_section_symbol_ is | |
1227 | // false), the local symbol index. For a local section symbol | |
1228 | // (this->is_section_symbol_ is true), the section index in the | |
1229 | // input file. | |
c06b7b0b | 1230 | unsigned int local_sym_index_; |
a3ad94ed | 1231 | // The reloc type--a processor specific code. |
397b129b | 1232 | unsigned int type_ : 28; |
e8c846c3 ILT |
1233 | // True if the relocation is a RELATIVE relocation. |
1234 | bool is_relative_ : 1; | |
0da6fa6c DM |
1235 | // True if the relocation is one which should not use |
1236 | // a symbol, but which obtains its addend from a symbol. | |
1237 | bool is_symbolless_ : 1; | |
dceae3c1 ILT |
1238 | // True if the relocation is against a section symbol. |
1239 | bool is_section_symbol_ : 1; | |
13cf9988 | 1240 | // True if the addend should be the PLT offset. |
397b129b CC |
1241 | // (Used only for RELA, but stored here for space.) |
1242 | bool use_plt_offset_ : 1; | |
5a6f7e2d ILT |
1243 | // If the reloc address is an input section in an object, the |
1244 | // section index. This is INVALID_CODE if the reloc address is | |
1245 | // specified in some other way. | |
1246 | unsigned int shndx_; | |
c06b7b0b ILT |
1247 | }; |
1248 | ||
1249 | // The SHT_RELA version of Output_reloc<>. This is just derived from | |
1250 | // the SHT_REL version of Output_reloc, but it adds an addend. | |
1251 | ||
1252 | template<bool dynamic, int size, bool big_endian> | |
1253 | class Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
1254 | { | |
1255 | public: | |
1256 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1257 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend; | |
1258 | ||
1259 | // An uninitialized entry. | |
1260 | Output_reloc() | |
1261 | : rel_() | |
1262 | { } | |
1263 | ||
1264 | // A reloc against a global symbol. | |
5a6f7e2d | 1265 | |
a3ad94ed | 1266 | Output_reloc(Symbol* gsym, unsigned int type, Output_data* od, |
0da6fa6c | 1267 | Address address, Addend addend, bool is_relative, |
13cf9988 DM |
1268 | bool is_symbolless, bool use_plt_offset) |
1269 | : rel_(gsym, type, od, address, is_relative, is_symbolless, | |
1270 | use_plt_offset), | |
0da6fa6c | 1271 | addend_(addend) |
c06b7b0b ILT |
1272 | { } |
1273 | ||
ef9beddf | 1274 | Output_reloc(Symbol* gsym, unsigned int type, |
34171bc5 | 1275 | Sized_relobj<size, big_endian>* relobj, |
2ea97941 | 1276 | unsigned int shndx, Address address, Addend addend, |
13cf9988 | 1277 | bool is_relative, bool is_symbolless, bool use_plt_offset) |
0da6fa6c | 1278 | : rel_(gsym, type, relobj, shndx, address, is_relative, |
13cf9988 | 1279 | is_symbolless, use_plt_offset), addend_(addend) |
5a6f7e2d ILT |
1280 | { } |
1281 | ||
c06b7b0b | 1282 | // A reloc against a local symbol. |
5a6f7e2d ILT |
1283 | |
1284 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
e8c846c3 | 1285 | unsigned int local_sym_index, unsigned int type, |
2ea97941 | 1286 | Output_data* od, Address address, |
0da6fa6c | 1287 | Addend addend, bool is_relative, |
397b129b CC |
1288 | bool is_symbolless, bool is_section_symbol, |
1289 | bool use_plt_offset) | |
2ea97941 | 1290 | : rel_(relobj, local_sym_index, type, od, address, is_relative, |
34171bc5 | 1291 | is_symbolless, is_section_symbol, use_plt_offset), |
e8c846c3 | 1292 | addend_(addend) |
5a6f7e2d ILT |
1293 | { } |
1294 | ||
1295 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
e8c846c3 | 1296 | unsigned int local_sym_index, unsigned int type, |
2ea97941 | 1297 | unsigned int shndx, Address address, |
0da6fa6c | 1298 | Addend addend, bool is_relative, |
397b129b CC |
1299 | bool is_symbolless, bool is_section_symbol, |
1300 | bool use_plt_offset) | |
2ea97941 | 1301 | : rel_(relobj, local_sym_index, type, shndx, address, is_relative, |
34171bc5 | 1302 | is_symbolless, is_section_symbol, use_plt_offset), |
5a6f7e2d | 1303 | addend_(addend) |
c06b7b0b ILT |
1304 | { } |
1305 | ||
1306 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 1307 | |
a3ad94ed | 1308 | Output_reloc(Output_section* os, unsigned int type, Output_data* od, |
703d02da AM |
1309 | Address address, Addend addend, bool is_relative) |
1310 | : rel_(os, type, od, address, is_relative), addend_(addend) | |
c06b7b0b ILT |
1311 | { } |
1312 | ||
ef9beddf | 1313 | Output_reloc(Output_section* os, unsigned int type, |
34171bc5 | 1314 | Sized_relobj<size, big_endian>* relobj, |
703d02da AM |
1315 | unsigned int shndx, Address address, Addend addend, |
1316 | bool is_relative) | |
1317 | : rel_(os, type, relobj, shndx, address, is_relative), addend_(addend) | |
5a6f7e2d ILT |
1318 | { } |
1319 | ||
ec661b9d | 1320 | // An absolute or relative relocation with no symbol. |
e291e7b9 ILT |
1321 | |
1322 | Output_reloc(unsigned int type, Output_data* od, Address address, | |
ec661b9d AM |
1323 | Addend addend, bool is_relative) |
1324 | : rel_(type, od, address, is_relative), addend_(addend) | |
e291e7b9 ILT |
1325 | { } |
1326 | ||
1327 | Output_reloc(unsigned int type, Sized_relobj<size, big_endian>* relobj, | |
ec661b9d AM |
1328 | unsigned int shndx, Address address, Addend addend, |
1329 | bool is_relative) | |
1330 | : rel_(type, relobj, shndx, address, is_relative), addend_(addend) | |
e291e7b9 ILT |
1331 | { } |
1332 | ||
1333 | // A target specific relocation. The target will be called to get | |
1334 | // the symbol index and the addend, passing ARG. The type and | |
1335 | // offset will be set as for other relocation types. | |
1336 | ||
1337 | Output_reloc(unsigned int type, void* arg, Output_data* od, | |
1338 | Address address, Addend addend) | |
1339 | : rel_(type, arg, od, address), addend_(addend) | |
1340 | { } | |
1341 | ||
1342 | Output_reloc(unsigned int type, void* arg, | |
1343 | Sized_relobj<size, big_endian>* relobj, | |
1344 | unsigned int shndx, Address address, Addend addend) | |
1345 | : rel_(type, arg, relobj, shndx, address), addend_(addend) | |
1346 | { } | |
1347 | ||
1348 | // Return whether this is a RELATIVE relocation. | |
3a44184e ILT |
1349 | bool |
1350 | is_relative() const | |
1351 | { return this->rel_.is_relative(); } | |
1352 | ||
0da6fa6c DM |
1353 | // Return whether this is a relocation which should not use |
1354 | // a symbol, but which obtains its addend from a symbol. | |
1355 | bool | |
1356 | is_symbolless() const | |
1357 | { return this->rel_.is_symbolless(); } | |
1358 | ||
6fa2a40b CC |
1359 | // If this relocation is against an input section, return the |
1360 | // relocatable object containing the input section. | |
1361 | Sized_relobj<size, big_endian>* | |
1362 | get_relobj() const | |
1363 | { return this->rel_.get_relobj(); } | |
1364 | ||
c06b7b0b ILT |
1365 | // Write the reloc entry to an output view. |
1366 | void | |
1367 | write(unsigned char* pov) const; | |
1368 | ||
d98bc257 ILT |
1369 | // Return whether this reloc should be sorted before the argument |
1370 | // when sorting dynamic relocs. | |
1371 | bool | |
1372 | sort_before(const Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>& | |
1373 | r2) const | |
1374 | { | |
1375 | int i = this->rel_.compare(r2.rel_); | |
1376 | if (i < 0) | |
d98bc257 | 1377 | return true; |
cc28ec61 ILT |
1378 | else if (i > 0) |
1379 | return false; | |
d98bc257 ILT |
1380 | else |
1381 | return this->addend_ < r2.addend_; | |
1382 | } | |
1383 | ||
c06b7b0b ILT |
1384 | private: |
1385 | // The basic reloc. | |
1386 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> rel_; | |
1387 | // The addend. | |
1388 | Addend addend_; | |
1389 | }; | |
1390 | ||
3a44184e ILT |
1391 | // Output_data_reloc_generic is a non-template base class for |
1392 | // Output_data_reloc_base. This gives the generic code a way to hold | |
1393 | // a pointer to a reloc section. | |
1394 | ||
1395 | class Output_data_reloc_generic : public Output_section_data_build | |
1396 | { | |
1397 | public: | |
1398 | Output_data_reloc_generic(int size, bool sort_relocs) | |
1399 | : Output_section_data_build(Output_data::default_alignment_for_size(size)), | |
1400 | relative_reloc_count_(0), sort_relocs_(sort_relocs) | |
1401 | { } | |
1402 | ||
1403 | // Return the number of relative relocs in this section. | |
1404 | size_t | |
1405 | relative_reloc_count() const | |
1406 | { return this->relative_reloc_count_; } | |
1407 | ||
1408 | // Whether we should sort the relocs. | |
1409 | bool | |
1410 | sort_relocs() const | |
1411 | { return this->sort_relocs_; } | |
1412 | ||
83896202 ILT |
1413 | // Add a reloc of type TYPE against the global symbol GSYM. The |
1414 | // relocation applies to the data at offset ADDRESS within OD. | |
1415 | virtual void | |
1416 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, | |
1417 | uint64_t address, uint64_t addend) = 0; | |
1418 | ||
1419 | // Add a reloc of type TYPE against the global symbol GSYM. The | |
1420 | // relocation applies to data at offset ADDRESS within section SHNDX | |
1421 | // of object file RELOBJ. OD is the associated output section. | |
1422 | virtual void | |
1423 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, | |
1424 | Relobj* relobj, unsigned int shndx, uint64_t address, | |
1425 | uint64_t addend) = 0; | |
1426 | ||
1427 | // Add a reloc of type TYPE against the local symbol LOCAL_SYM_INDEX | |
1428 | // in RELOBJ. The relocation applies to the data at offset ADDRESS | |
1429 | // within OD. | |
1430 | virtual void | |
1431 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1432 | unsigned int type, Output_data* od, uint64_t address, | |
1433 | uint64_t addend) = 0; | |
1434 | ||
1435 | // Add a reloc of type TYPE against the local symbol LOCAL_SYM_INDEX | |
1436 | // in RELOBJ. The relocation applies to the data at offset ADDRESS | |
1437 | // within section SHNDX of RELOBJ. OD is the associated output | |
1438 | // section. | |
1439 | virtual void | |
1440 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1441 | unsigned int type, Output_data* od, unsigned int shndx, | |
1442 | uint64_t address, uint64_t addend) = 0; | |
1443 | ||
1444 | // Add a reloc of type TYPE against the STT_SECTION symbol of the | |
1445 | // output section OS. The relocation applies to the data at offset | |
1446 | // ADDRESS within OD. | |
1447 | virtual void | |
1448 | add_output_section_generic(Output_section *os, unsigned int type, | |
1449 | Output_data* od, uint64_t address, | |
1450 | uint64_t addend) = 0; | |
1451 | ||
1452 | // Add a reloc of type TYPE against the STT_SECTION symbol of the | |
1453 | // output section OS. The relocation applies to the data at offset | |
1454 | // ADDRESS within section SHNDX of RELOBJ. OD is the associated | |
1455 | // output section. | |
1456 | virtual void | |
1457 | add_output_section_generic(Output_section* os, unsigned int type, | |
1458 | Output_data* od, Relobj* relobj, | |
1459 | unsigned int shndx, uint64_t address, | |
1460 | uint64_t addend) = 0; | |
1461 | ||
3a44184e ILT |
1462 | protected: |
1463 | // Note that we've added another relative reloc. | |
1464 | void | |
1465 | bump_relative_reloc_count() | |
1466 | { ++this->relative_reloc_count_; } | |
1467 | ||
1468 | private: | |
1469 | // The number of relative relocs added to this section. This is to | |
1470 | // support DT_RELCOUNT. | |
1471 | size_t relative_reloc_count_; | |
1472 | // Whether to sort the relocations when writing them out, to make | |
1473 | // the dynamic linker more efficient. | |
1474 | bool sort_relocs_; | |
1475 | }; | |
1476 | ||
c06b7b0b ILT |
1477 | // Output_data_reloc is used to manage a section containing relocs. |
1478 | // SH_TYPE is either elfcpp::SHT_REL or elfcpp::SHT_RELA. DYNAMIC | |
1479 | // indicates whether this is a dynamic relocation or a normal | |
1480 | // relocation. Output_data_reloc_base is a base class. | |
1481 | // Output_data_reloc is the real class, which we specialize based on | |
1482 | // the reloc type. | |
1483 | ||
1484 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
3a44184e | 1485 | class Output_data_reloc_base : public Output_data_reloc_generic |
c06b7b0b ILT |
1486 | { |
1487 | public: | |
1488 | typedef Output_reloc<sh_type, dynamic, size, big_endian> Output_reloc_type; | |
1489 | typedef typename Output_reloc_type::Address Address; | |
1490 | static const int reloc_size = | |
1491 | Reloc_types<sh_type, size, big_endian>::reloc_size; | |
1492 | ||
1493 | // Construct the section. | |
d98bc257 | 1494 | Output_data_reloc_base(bool sort_relocs) |
3a44184e | 1495 | : Output_data_reloc_generic(size, sort_relocs) |
c06b7b0b ILT |
1496 | { } |
1497 | ||
27bc2bce | 1498 | protected: |
c06b7b0b ILT |
1499 | // Write out the data. |
1500 | void | |
1501 | do_write(Output_file*); | |
1502 | ||
16649710 ILT |
1503 | // Set the entry size and the link. |
1504 | void | |
ca09d69a | 1505 | do_adjust_output_section(Output_section* os); |
16649710 | 1506 | |
7d9e3d98 ILT |
1507 | // Write to a map file. |
1508 | void | |
1509 | do_print_to_mapfile(Mapfile* mapfile) const | |
1510 | { | |
1511 | mapfile->print_output_data(this, | |
1512 | (dynamic | |
1513 | ? _("** dynamic relocs") | |
1514 | : _("** relocs"))); | |
1515 | } | |
1516 | ||
c06b7b0b ILT |
1517 | // Add a relocation entry. |
1518 | void | |
ca09d69a | 1519 | add(Output_data* od, const Output_reloc_type& reloc) |
c06b7b0b ILT |
1520 | { |
1521 | this->relocs_.push_back(reloc); | |
27bc2bce | 1522 | this->set_current_data_size(this->relocs_.size() * reloc_size); |
8b8dd8d5 ILT |
1523 | if (dynamic) |
1524 | od->add_dynamic_reloc(); | |
3a44184e ILT |
1525 | if (reloc.is_relative()) |
1526 | this->bump_relative_reloc_count(); | |
6fa2a40b CC |
1527 | Sized_relobj<size, big_endian>* relobj = reloc.get_relobj(); |
1528 | if (relobj != NULL) | |
1529 | relobj->add_dyn_reloc(this->relocs_.size() - 1); | |
c06b7b0b ILT |
1530 | } |
1531 | ||
1532 | private: | |
1533 | typedef std::vector<Output_reloc_type> Relocs; | |
1534 | ||
d98bc257 ILT |
1535 | // The class used to sort the relocations. |
1536 | struct Sort_relocs_comparison | |
1537 | { | |
1538 | bool | |
1539 | operator()(const Output_reloc_type& r1, const Output_reloc_type& r2) const | |
1540 | { return r1.sort_before(r2); } | |
1541 | }; | |
1542 | ||
1543 | // The relocations in this section. | |
c06b7b0b ILT |
1544 | Relocs relocs_; |
1545 | }; | |
1546 | ||
1547 | // The class which callers actually create. | |
1548 | ||
1549 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
1550 | class Output_data_reloc; | |
1551 | ||
1552 | // The SHT_REL version of Output_data_reloc. | |
1553 | ||
1554 | template<bool dynamic, int size, bool big_endian> | |
1555 | class Output_data_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> | |
1556 | : public Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian> | |
1557 | { | |
dceae3c1 | 1558 | private: |
c06b7b0b ILT |
1559 | typedef Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, |
1560 | big_endian> Base; | |
1561 | ||
1562 | public: | |
1563 | typedef typename Base::Output_reloc_type Output_reloc_type; | |
1564 | typedef typename Output_reloc_type::Address Address; | |
1565 | ||
d98bc257 ILT |
1566 | Output_data_reloc(bool sr) |
1567 | : Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian>(sr) | |
c06b7b0b ILT |
1568 | { } |
1569 | ||
1570 | // Add a reloc against a global symbol. | |
5a6f7e2d | 1571 | |
c06b7b0b | 1572 | void |
2ea97941 | 1573 | add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address) |
34171bc5 AM |
1574 | { |
1575 | this->add(od, Output_reloc_type(gsym, type, od, address, | |
1576 | false, false, false)); | |
1577 | } | |
c06b7b0b | 1578 | |
5a6f7e2d | 1579 | void |
ef9beddf | 1580 | add_global(Symbol* gsym, unsigned int type, Output_data* od, |
34171bc5 | 1581 | Sized_relobj<size, big_endian>* relobj, |
2ea97941 | 1582 | unsigned int shndx, Address address) |
34171bc5 AM |
1583 | { |
1584 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
1585 | false, false, false)); | |
1586 | } | |
e8c846c3 | 1587 | |
12c0daef | 1588 | void |
83896202 ILT |
1589 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, |
1590 | uint64_t address, uint64_t addend) | |
12c0daef ILT |
1591 | { |
1592 | gold_assert(addend == 0); | |
83896202 ILT |
1593 | this->add(od, Output_reloc_type(gsym, type, od, |
1594 | convert_types<Address, uint64_t>(address), | |
13cf9988 | 1595 | false, false, false)); |
12c0daef ILT |
1596 | } |
1597 | ||
1598 | void | |
83896202 ILT |
1599 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, |
1600 | Relobj* relobj, unsigned int shndx, uint64_t address, | |
1601 | uint64_t addend) | |
12c0daef ILT |
1602 | { |
1603 | gold_assert(addend == 0); | |
83896202 ILT |
1604 | Sized_relobj<size, big_endian>* sized_relobj = |
1605 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
1606 | this->add(od, Output_reloc_type(gsym, type, sized_relobj, shndx, | |
1607 | convert_types<Address, uint64_t>(address), | |
13cf9988 | 1608 | false, false, false)); |
12c0daef ILT |
1609 | } |
1610 | ||
e8c846c3 ILT |
1611 | // Add a RELATIVE reloc against a global symbol. The final relocation |
1612 | // will not reference the symbol. | |
1613 | ||
1614 | void | |
1615 | add_global_relative(Symbol* gsym, unsigned int type, Output_data* od, | |
34171bc5 AM |
1616 | Address address) |
1617 | { | |
1618 | this->add(od, Output_reloc_type(gsym, type, od, address, true, true, | |
1619 | false)); | |
1620 | } | |
e8c846c3 ILT |
1621 | |
1622 | void | |
1623 | add_global_relative(Symbol* gsym, unsigned int type, Output_data* od, | |
34171bc5 AM |
1624 | Sized_relobj<size, big_endian>* relobj, |
1625 | unsigned int shndx, Address address) | |
dceae3c1 | 1626 | { |
2ea97941 | 1627 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, |
34171bc5 | 1628 | true, true, false)); |
0da6fa6c DM |
1629 | } |
1630 | ||
1631 | // Add a global relocation which does not use a symbol for the relocation, | |
1632 | // but which gets its addend from a symbol. | |
1633 | ||
1634 | void | |
1635 | add_symbolless_global_addend(Symbol* gsym, unsigned int type, | |
1636 | Output_data* od, Address address) | |
34171bc5 AM |
1637 | { |
1638 | this->add(od, Output_reloc_type(gsym, type, od, address, false, true, | |
1639 | false)); | |
1640 | } | |
0da6fa6c DM |
1641 | |
1642 | void | |
1643 | add_symbolless_global_addend(Symbol* gsym, unsigned int type, | |
1644 | Output_data* od, | |
1645 | Sized_relobj<size, big_endian>* relobj, | |
1646 | unsigned int shndx, Address address) | |
1647 | { | |
1648 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
34171bc5 | 1649 | false, true, false)); |
dceae3c1 | 1650 | } |
5a6f7e2d | 1651 | |
c06b7b0b | 1652 | // Add a reloc against a local symbol. |
5a6f7e2d | 1653 | |
c06b7b0b | 1654 | void |
5a6f7e2d | 1655 | add_local(Sized_relobj<size, big_endian>* relobj, |
a3ad94ed | 1656 | unsigned int local_sym_index, unsigned int type, |
2ea97941 | 1657 | Output_data* od, Address address) |
dceae3c1 ILT |
1658 | { |
1659 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, | |
34171bc5 | 1660 | address, false, false, false, false)); |
dceae3c1 | 1661 | } |
5a6f7e2d ILT |
1662 | |
1663 | void | |
1664 | add_local(Sized_relobj<size, big_endian>* relobj, | |
1665 | unsigned int local_sym_index, unsigned int type, | |
2ea97941 | 1666 | Output_data* od, unsigned int shndx, Address address) |
dceae3c1 ILT |
1667 | { |
1668 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
397b129b | 1669 | address, false, false, false, false)); |
dceae3c1 | 1670 | } |
e8c846c3 | 1671 | |
83896202 ILT |
1672 | void |
1673 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1674 | unsigned int type, Output_data* od, uint64_t address, | |
1675 | uint64_t addend) | |
1676 | { | |
1677 | gold_assert(addend == 0); | |
1678 | Sized_relobj<size, big_endian>* sized_relobj = | |
1679 | static_cast<Sized_relobj<size, big_endian> *>(relobj); | |
1680 | this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, od, | |
1681 | convert_types<Address, uint64_t>(address), | |
1682 | false, false, false, false)); | |
1683 | } | |
1684 | ||
1685 | void | |
1686 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1687 | unsigned int type, Output_data* od, unsigned int shndx, | |
1688 | uint64_t address, uint64_t addend) | |
1689 | { | |
1690 | gold_assert(addend == 0); | |
1691 | Sized_relobj<size, big_endian>* sized_relobj = | |
1692 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
1693 | this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, shndx, | |
1694 | convert_types<Address, uint64_t>(address), | |
1695 | false, false, false, false)); | |
1696 | } | |
1697 | ||
e8c846c3 | 1698 | // Add a RELATIVE reloc against a local symbol. |
5a6f7e2d | 1699 | |
e8c846c3 ILT |
1700 | void |
1701 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1702 | unsigned int local_sym_index, unsigned int type, |
1703 | Output_data* od, Address address) | |
dceae3c1 ILT |
1704 | { |
1705 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, | |
34171bc5 | 1706 | address, true, true, false, false)); |
dceae3c1 | 1707 | } |
e8c846c3 ILT |
1708 | |
1709 | void | |
1710 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1711 | unsigned int local_sym_index, unsigned int type, |
1712 | Output_data* od, unsigned int shndx, Address address) | |
dceae3c1 ILT |
1713 | { |
1714 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
397b129b | 1715 | address, true, true, false, false)); |
0da6fa6c DM |
1716 | } |
1717 | ||
1718 | // Add a local relocation which does not use a symbol for the relocation, | |
1719 | // but which gets its addend from a symbol. | |
1720 | ||
1721 | void | |
1722 | add_symbolless_local_addend(Sized_relobj<size, big_endian>* relobj, | |
1723 | unsigned int local_sym_index, unsigned int type, | |
1724 | Output_data* od, Address address) | |
1725 | { | |
1726 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, | |
34171bc5 | 1727 | address, false, true, false, false)); |
0da6fa6c DM |
1728 | } |
1729 | ||
1730 | void | |
1731 | add_symbolless_local_addend(Sized_relobj<size, big_endian>* relobj, | |
1732 | unsigned int local_sym_index, unsigned int type, | |
1733 | Output_data* od, unsigned int shndx, | |
1734 | Address address) | |
1735 | { | |
1736 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
397b129b | 1737 | address, false, true, false, false)); |
dceae3c1 ILT |
1738 | } |
1739 | ||
1740 | // Add a reloc against a local section symbol. This will be | |
1741 | // converted into a reloc against the STT_SECTION symbol of the | |
1742 | // output section. | |
1743 | ||
1744 | void | |
1745 | add_local_section(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1746 | unsigned int input_shndx, unsigned int type, |
1747 | Output_data* od, Address address) | |
dceae3c1 ILT |
1748 | { |
1749 | this->add(od, Output_reloc_type(relobj, input_shndx, type, od, | |
34171bc5 | 1750 | address, false, false, true, false)); |
dceae3c1 ILT |
1751 | } |
1752 | ||
1753 | void | |
1754 | add_local_section(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1755 | unsigned int input_shndx, unsigned int type, |
1756 | Output_data* od, unsigned int shndx, Address address) | |
dceae3c1 ILT |
1757 | { |
1758 | this->add(od, Output_reloc_type(relobj, input_shndx, type, shndx, | |
34171bc5 | 1759 | address, false, false, true, false)); |
dceae3c1 | 1760 | } |
c06b7b0b ILT |
1761 | |
1762 | // A reloc against the STT_SECTION symbol of an output section. | |
4f4c5f80 ILT |
1763 | // OS is the Output_section that the relocation refers to; OD is |
1764 | // the Output_data object being relocated. | |
5a6f7e2d | 1765 | |
c06b7b0b | 1766 | void |
a3ad94ed | 1767 | add_output_section(Output_section* os, unsigned int type, |
2ea97941 | 1768 | Output_data* od, Address address) |
703d02da | 1769 | { this->add(od, Output_reloc_type(os, type, od, address, false)); } |
5a6f7e2d ILT |
1770 | |
1771 | void | |
4f4c5f80 | 1772 | add_output_section(Output_section* os, unsigned int type, Output_data* od, |
ef9beddf | 1773 | Sized_relobj<size, big_endian>* relobj, |
34171bc5 | 1774 | unsigned int shndx, Address address) |
703d02da | 1775 | { this->add(od, Output_reloc_type(os, type, relobj, shndx, address, false)); } |
e291e7b9 | 1776 | |
83896202 ILT |
1777 | void |
1778 | add_output_section_generic(Output_section* os, unsigned int type, | |
1779 | Output_data* od, uint64_t address, | |
1780 | uint64_t addend) | |
1781 | { | |
1782 | gold_assert(addend == 0); | |
1783 | this->add(od, Output_reloc_type(os, type, od, | |
703d02da AM |
1784 | convert_types<Address, uint64_t>(address), |
1785 | false)); | |
83896202 ILT |
1786 | } |
1787 | ||
1788 | void | |
1789 | add_output_section_generic(Output_section* os, unsigned int type, | |
1790 | Output_data* od, Relobj* relobj, | |
1791 | unsigned int shndx, uint64_t address, | |
1792 | uint64_t addend) | |
1793 | { | |
1794 | gold_assert(addend == 0); | |
1795 | Sized_relobj<size, big_endian>* sized_relobj = | |
1796 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
1797 | this->add(od, Output_reloc_type(os, type, sized_relobj, shndx, | |
703d02da AM |
1798 | convert_types<Address, uint64_t>(address), |
1799 | false)); | |
83896202 ILT |
1800 | } |
1801 | ||
703d02da AM |
1802 | // As above, but the reloc TYPE is relative |
1803 | ||
1804 | void | |
1805 | add_output_section_relative(Output_section* os, unsigned int type, | |
1806 | Output_data* od, Address address) | |
1807 | { this->add(od, Output_reloc_type(os, type, od, address, true)); } | |
1808 | ||
1809 | void | |
1810 | add_output_section_relative(Output_section* os, unsigned int type, | |
1811 | Output_data* od, | |
1812 | Sized_relobj<size, big_endian>* relobj, | |
1813 | unsigned int shndx, Address address) | |
1814 | { this->add(od, Output_reloc_type(os, type, relobj, shndx, address, true)); } | |
1815 | ||
e291e7b9 ILT |
1816 | // Add an absolute relocation. |
1817 | ||
1818 | void | |
1819 | add_absolute(unsigned int type, Output_data* od, Address address) | |
ec661b9d | 1820 | { this->add(od, Output_reloc_type(type, od, address, false)); } |
e291e7b9 ILT |
1821 | |
1822 | void | |
1823 | add_absolute(unsigned int type, Output_data* od, | |
1824 | Sized_relobj<size, big_endian>* relobj, | |
1825 | unsigned int shndx, Address address) | |
ec661b9d AM |
1826 | { this->add(od, Output_reloc_type(type, relobj, shndx, address, false)); } |
1827 | ||
1828 | // Add a relative relocation | |
1829 | ||
1830 | void | |
1831 | add_relative(unsigned int type, Output_data* od, Address address) | |
1832 | { this->add(od, Output_reloc_type(type, od, address, true)); } | |
1833 | ||
1834 | void | |
1835 | add_relative(unsigned int type, Output_data* od, | |
1836 | Sized_relobj<size, big_endian>* relobj, | |
1837 | unsigned int shndx, Address address) | |
1838 | { this->add(od, Output_reloc_type(type, relobj, shndx, address, true)); } | |
e291e7b9 ILT |
1839 | |
1840 | // Add a target specific relocation. A target which calls this must | |
1841 | // define the reloc_symbol_index and reloc_addend virtual functions. | |
1842 | ||
1843 | void | |
1844 | add_target_specific(unsigned int type, void* arg, Output_data* od, | |
1845 | Address address) | |
1846 | { this->add(od, Output_reloc_type(type, arg, od, address)); } | |
1847 | ||
1848 | void | |
1849 | add_target_specific(unsigned int type, void* arg, Output_data* od, | |
1850 | Sized_relobj<size, big_endian>* relobj, | |
1851 | unsigned int shndx, Address address) | |
1852 | { this->add(od, Output_reloc_type(type, arg, relobj, shndx, address)); } | |
c06b7b0b ILT |
1853 | }; |
1854 | ||
1855 | // The SHT_RELA version of Output_data_reloc. | |
1856 | ||
1857 | template<bool dynamic, int size, bool big_endian> | |
1858 | class Output_data_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
1859 | : public Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
1860 | { | |
dceae3c1 | 1861 | private: |
c06b7b0b ILT |
1862 | typedef Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, |
1863 | big_endian> Base; | |
1864 | ||
1865 | public: | |
1866 | typedef typename Base::Output_reloc_type Output_reloc_type; | |
1867 | typedef typename Output_reloc_type::Address Address; | |
1868 | typedef typename Output_reloc_type::Addend Addend; | |
1869 | ||
d98bc257 ILT |
1870 | Output_data_reloc(bool sr) |
1871 | : Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian>(sr) | |
c06b7b0b ILT |
1872 | { } |
1873 | ||
1874 | // Add a reloc against a global symbol. | |
5a6f7e2d | 1875 | |
c06b7b0b | 1876 | void |
a3ad94ed | 1877 | add_global(Symbol* gsym, unsigned int type, Output_data* od, |
2ea97941 | 1878 | Address address, Addend addend) |
34171bc5 AM |
1879 | { |
1880 | this->add(od, Output_reloc_type(gsym, type, od, address, addend, | |
1881 | false, false, false)); | |
1882 | } | |
c06b7b0b | 1883 | |
5a6f7e2d | 1884 | void |
ef9beddf | 1885 | add_global(Symbol* gsym, unsigned int type, Output_data* od, |
34171bc5 | 1886 | Sized_relobj<size, big_endian>* relobj, |
2ea97941 | 1887 | unsigned int shndx, Address address, |
4f4c5f80 | 1888 | Addend addend) |
34171bc5 AM |
1889 | { |
1890 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
1891 | addend, false, false, false)); | |
1892 | } | |
e8c846c3 | 1893 | |
83896202 ILT |
1894 | void |
1895 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, | |
1896 | uint64_t address, uint64_t addend) | |
1897 | { | |
1898 | this->add(od, Output_reloc_type(gsym, type, od, | |
1899 | convert_types<Address, uint64_t>(address), | |
1900 | convert_types<Addend, uint64_t>(addend), | |
13cf9988 | 1901 | false, false, false)); |
83896202 ILT |
1902 | } |
1903 | ||
1904 | void | |
1905 | add_global_generic(Symbol* gsym, unsigned int type, Output_data* od, | |
1906 | Relobj* relobj, unsigned int shndx, uint64_t address, | |
1907 | uint64_t addend) | |
1908 | { | |
1909 | Sized_relobj<size, big_endian>* sized_relobj = | |
1910 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
1911 | this->add(od, Output_reloc_type(gsym, type, sized_relobj, shndx, | |
1912 | convert_types<Address, uint64_t>(address), | |
1913 | convert_types<Addend, uint64_t>(addend), | |
13cf9988 | 1914 | false, false, false)); |
83896202 ILT |
1915 | } |
1916 | ||
e8c846c3 ILT |
1917 | // Add a RELATIVE reloc against a global symbol. The final output |
1918 | // relocation will not reference the symbol, but we must keep the symbol | |
1919 | // information long enough to set the addend of the relocation correctly | |
1920 | // when it is written. | |
1921 | ||
1922 | void | |
1923 | add_global_relative(Symbol* gsym, unsigned int type, Output_data* od, | |
34171bc5 AM |
1924 | Address address, Addend addend, bool use_plt_offset) |
1925 | { | |
1926 | this->add(od, Output_reloc_type(gsym, type, od, address, addend, true, | |
1927 | true, use_plt_offset)); | |
1928 | } | |
e8c846c3 ILT |
1929 | |
1930 | void | |
1931 | add_global_relative(Symbol* gsym, unsigned int type, Output_data* od, | |
34171bc5 AM |
1932 | Sized_relobj<size, big_endian>* relobj, |
1933 | unsigned int shndx, Address address, Addend addend, | |
13cf9988 | 1934 | bool use_plt_offset) |
34171bc5 AM |
1935 | { |
1936 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
1937 | addend, true, true, use_plt_offset)); | |
1938 | } | |
0da6fa6c DM |
1939 | |
1940 | // Add a global relocation which does not use a symbol for the relocation, | |
1941 | // but which gets its addend from a symbol. | |
1942 | ||
1943 | void | |
1944 | add_symbolless_global_addend(Symbol* gsym, unsigned int type, Output_data* od, | |
1945 | Address address, Addend addend) | |
34171bc5 AM |
1946 | { |
1947 | this->add(od, Output_reloc_type(gsym, type, od, address, addend, | |
1948 | false, true, false)); | |
1949 | } | |
0da6fa6c DM |
1950 | |
1951 | void | |
1952 | add_symbolless_global_addend(Symbol* gsym, unsigned int type, | |
1953 | Output_data* od, | |
1954 | Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
1955 | unsigned int shndx, Address address, |
1956 | Addend addend) | |
1957 | { | |
1958 | this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address, | |
1959 | addend, false, true, false)); | |
1960 | } | |
5a6f7e2d | 1961 | |
c06b7b0b | 1962 | // Add a reloc against a local symbol. |
5a6f7e2d | 1963 | |
c06b7b0b | 1964 | void |
5a6f7e2d | 1965 | add_local(Sized_relobj<size, big_endian>* relobj, |
c06b7b0b | 1966 | unsigned int local_sym_index, unsigned int type, |
2ea97941 | 1967 | Output_data* od, Address address, Addend addend) |
c06b7b0b | 1968 | { |
2ea97941 | 1969 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address, |
397b129b | 1970 | addend, false, false, false, false)); |
5a6f7e2d ILT |
1971 | } |
1972 | ||
1973 | void | |
1974 | add_local(Sized_relobj<size, big_endian>* relobj, | |
1975 | unsigned int local_sym_index, unsigned int type, | |
2ea97941 | 1976 | Output_data* od, unsigned int shndx, Address address, |
4f4c5f80 | 1977 | Addend addend) |
5a6f7e2d | 1978 | { |
4f4c5f80 | 1979 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, |
34171bc5 AM |
1980 | address, addend, false, false, false, |
1981 | false)); | |
e8c846c3 ILT |
1982 | } |
1983 | ||
83896202 ILT |
1984 | void |
1985 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1986 | unsigned int type, Output_data* od, uint64_t address, | |
1987 | uint64_t addend) | |
1988 | { | |
1989 | Sized_relobj<size, big_endian>* sized_relobj = | |
1990 | static_cast<Sized_relobj<size, big_endian> *>(relobj); | |
1991 | this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, od, | |
1992 | convert_types<Address, uint64_t>(address), | |
1993 | convert_types<Addend, uint64_t>(addend), | |
1994 | false, false, false, false)); | |
1995 | } | |
1996 | ||
1997 | void | |
1998 | add_local_generic(Relobj* relobj, unsigned int local_sym_index, | |
1999 | unsigned int type, Output_data* od, unsigned int shndx, | |
2000 | uint64_t address, uint64_t addend) | |
2001 | { | |
2002 | Sized_relobj<size, big_endian>* sized_relobj = | |
2003 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
2004 | this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, shndx, | |
2005 | convert_types<Address, uint64_t>(address), | |
2006 | convert_types<Addend, uint64_t>(addend), | |
2007 | false, false, false, false)); | |
2008 | } | |
2009 | ||
e8c846c3 ILT |
2010 | // Add a RELATIVE reloc against a local symbol. |
2011 | ||
2012 | void | |
2013 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
2014 | unsigned int local_sym_index, unsigned int type, |
2015 | Output_data* od, Address address, Addend addend, | |
2016 | bool use_plt_offset) | |
e8c846c3 | 2017 | { |
2ea97941 | 2018 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address, |
397b129b CC |
2019 | addend, true, true, false, |
2020 | use_plt_offset)); | |
e8c846c3 ILT |
2021 | } |
2022 | ||
2023 | void | |
2024 | add_local_relative(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
2025 | unsigned int local_sym_index, unsigned int type, |
2026 | Output_data* od, unsigned int shndx, Address address, | |
2027 | Addend addend, bool use_plt_offset) | |
e8c846c3 ILT |
2028 | { |
2029 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
34171bc5 AM |
2030 | address, addend, true, true, false, |
2031 | use_plt_offset)); | |
0da6fa6c DM |
2032 | } |
2033 | ||
2034 | // Add a local relocation which does not use a symbol for the relocation, | |
2035 | // but which gets it's addend from a symbol. | |
2036 | ||
2037 | void | |
2038 | add_symbolless_local_addend(Sized_relobj<size, big_endian>* relobj, | |
2039 | unsigned int local_sym_index, unsigned int type, | |
2040 | Output_data* od, Address address, Addend addend) | |
2041 | { | |
2042 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address, | |
397b129b | 2043 | addend, false, true, false, false)); |
0da6fa6c DM |
2044 | } |
2045 | ||
2046 | void | |
2047 | add_symbolless_local_addend(Sized_relobj<size, big_endian>* relobj, | |
2048 | unsigned int local_sym_index, unsigned int type, | |
2049 | Output_data* od, unsigned int shndx, | |
2050 | Address address, Addend addend) | |
2051 | { | |
2052 | this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx, | |
34171bc5 AM |
2053 | address, addend, false, true, false, |
2054 | false)); | |
dceae3c1 ILT |
2055 | } |
2056 | ||
2057 | // Add a reloc against a local section symbol. This will be | |
2058 | // converted into a reloc against the STT_SECTION symbol of the | |
2059 | // output section. | |
2060 | ||
2061 | void | |
2062 | add_local_section(Sized_relobj<size, big_endian>* relobj, | |
34171bc5 AM |
2063 | unsigned int input_shndx, unsigned int type, |
2064 | Output_data* od, Address address, Addend addend) | |
dceae3c1 | 2065 | { |
2ea97941 | 2066 | this->add(od, Output_reloc_type(relobj, input_shndx, type, od, address, |
397b129b | 2067 | addend, false, false, true, false)); |
dceae3c1 ILT |
2068 | } |
2069 | ||
2070 | void | |
2071 | add_local_section(Sized_relobj<size, big_endian>* relobj, | |
6fa2a40b CC |
2072 | unsigned int input_shndx, unsigned int type, |
2073 | Output_data* od, unsigned int shndx, Address address, | |
2074 | Addend addend) | |
dceae3c1 ILT |
2075 | { |
2076 | this->add(od, Output_reloc_type(relobj, input_shndx, type, shndx, | |
34171bc5 AM |
2077 | address, addend, false, false, true, |
2078 | false)); | |
c06b7b0b ILT |
2079 | } |
2080 | ||
2081 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 2082 | |
c06b7b0b | 2083 | void |
a3ad94ed | 2084 | add_output_section(Output_section* os, unsigned int type, Output_data* od, |
2ea97941 | 2085 | Address address, Addend addend) |
703d02da | 2086 | { this->add(od, Output_reloc_type(os, type, od, address, addend, false)); } |
5a6f7e2d ILT |
2087 | |
2088 | void | |
829c9745 | 2089 | add_output_section(Output_section* os, unsigned int type, Output_data* od, |
34171bc5 | 2090 | Sized_relobj<size, big_endian>* relobj, |
2ea97941 | 2091 | unsigned int shndx, Address address, Addend addend) |
34171bc5 AM |
2092 | { |
2093 | this->add(od, Output_reloc_type(os, type, relobj, shndx, address, | |
2094 | addend, false)); | |
2095 | } | |
e291e7b9 | 2096 | |
83896202 ILT |
2097 | void |
2098 | add_output_section_generic(Output_section* os, unsigned int type, | |
2099 | Output_data* od, uint64_t address, | |
2100 | uint64_t addend) | |
2101 | { | |
2102 | this->add(od, Output_reloc_type(os, type, od, | |
2103 | convert_types<Address, uint64_t>(address), | |
703d02da AM |
2104 | convert_types<Addend, uint64_t>(addend), |
2105 | false)); | |
83896202 ILT |
2106 | } |
2107 | ||
2108 | void | |
2109 | add_output_section_generic(Output_section* os, unsigned int type, | |
2110 | Output_data* od, Relobj* relobj, | |
2111 | unsigned int shndx, uint64_t address, | |
2112 | uint64_t addend) | |
2113 | { | |
2114 | Sized_relobj<size, big_endian>* sized_relobj = | |
2115 | static_cast<Sized_relobj<size, big_endian>*>(relobj); | |
2116 | this->add(od, Output_reloc_type(os, type, sized_relobj, shndx, | |
2117 | convert_types<Address, uint64_t>(address), | |
703d02da AM |
2118 | convert_types<Addend, uint64_t>(addend), |
2119 | false)); | |
2120 | } | |
2121 | ||
2122 | // As above, but the reloc TYPE is relative | |
2123 | ||
2124 | void | |
2125 | add_output_section_relative(Output_section* os, unsigned int type, | |
2126 | Output_data* od, Address address, Addend addend) | |
2127 | { this->add(od, Output_reloc_type(os, type, od, address, addend, true)); } | |
2128 | ||
2129 | void | |
2130 | add_output_section_relative(Output_section* os, unsigned int type, | |
2131 | Output_data* od, | |
2132 | Sized_relobj<size, big_endian>* relobj, | |
2133 | unsigned int shndx, Address address, | |
2134 | Addend addend) | |
2135 | { | |
2136 | this->add(od, Output_reloc_type(os, type, relobj, shndx, | |
2137 | address, addend, true)); | |
83896202 ILT |
2138 | } |
2139 | ||
e291e7b9 ILT |
2140 | // Add an absolute relocation. |
2141 | ||
2142 | void | |
2143 | add_absolute(unsigned int type, Output_data* od, Address address, | |
2144 | Addend addend) | |
ec661b9d | 2145 | { this->add(od, Output_reloc_type(type, od, address, addend, false)); } |
e291e7b9 ILT |
2146 | |
2147 | void | |
2148 | add_absolute(unsigned int type, Output_data* od, | |
2149 | Sized_relobj<size, big_endian>* relobj, | |
2150 | unsigned int shndx, Address address, Addend addend) | |
34171bc5 AM |
2151 | { |
2152 | this->add(od, Output_reloc_type(type, relobj, shndx, address, addend, | |
2153 | false)); | |
2154 | } | |
ec661b9d AM |
2155 | |
2156 | // Add a relative relocation | |
2157 | ||
2158 | void | |
2159 | add_relative(unsigned int type, Output_data* od, Address address, | |
2160 | Addend addend) | |
2161 | { this->add(od, Output_reloc_type(type, od, address, addend, true)); } | |
2162 | ||
2163 | void | |
2164 | add_relative(unsigned int type, Output_data* od, | |
2165 | Sized_relobj<size, big_endian>* relobj, | |
2166 | unsigned int shndx, Address address, Addend addend) | |
34171bc5 AM |
2167 | { |
2168 | this->add(od, Output_reloc_type(type, relobj, shndx, address, addend, | |
2169 | true)); | |
2170 | } | |
e291e7b9 ILT |
2171 | |
2172 | // Add a target specific relocation. A target which calls this must | |
2173 | // define the reloc_symbol_index and reloc_addend virtual functions. | |
2174 | ||
2175 | void | |
2176 | add_target_specific(unsigned int type, void* arg, Output_data* od, | |
2177 | Address address, Addend addend) | |
2178 | { this->add(od, Output_reloc_type(type, arg, od, address, addend)); } | |
2179 | ||
2180 | void | |
2181 | add_target_specific(unsigned int type, void* arg, Output_data* od, | |
2182 | Sized_relobj<size, big_endian>* relobj, | |
2183 | unsigned int shndx, Address address, Addend addend) | |
2184 | { | |
2185 | this->add(od, Output_reloc_type(type, arg, relobj, shndx, address, | |
2186 | addend)); | |
2187 | } | |
c06b7b0b ILT |
2188 | }; |
2189 | ||
6a74a719 ILT |
2190 | // Output_relocatable_relocs represents a relocation section in a |
2191 | // relocatable link. The actual data is written out in the target | |
7404fe1b | 2192 | // hook relocate_relocs. This just saves space for it. |
6a74a719 ILT |
2193 | |
2194 | template<int sh_type, int size, bool big_endian> | |
2195 | class Output_relocatable_relocs : public Output_section_data | |
2196 | { | |
2197 | public: | |
2198 | Output_relocatable_relocs(Relocatable_relocs* rr) | |
2199 | : Output_section_data(Output_data::default_alignment_for_size(size)), | |
2200 | rr_(rr) | |
2201 | { } | |
2202 | ||
2203 | void | |
2204 | set_final_data_size(); | |
2205 | ||
2206 | // Write out the data. There is nothing to do here. | |
2207 | void | |
2208 | do_write(Output_file*) | |
2209 | { } | |
2210 | ||
7d9e3d98 ILT |
2211 | // Write to a map file. |
2212 | void | |
2213 | do_print_to_mapfile(Mapfile* mapfile) const | |
2214 | { mapfile->print_output_data(this, _("** relocs")); } | |
2215 | ||
6a74a719 ILT |
2216 | private: |
2217 | // The relocs associated with this input section. | |
2218 | Relocatable_relocs* rr_; | |
2219 | }; | |
2220 | ||
2221 | // Handle a GROUP section. | |
2222 | ||
2223 | template<int size, bool big_endian> | |
2224 | class Output_data_group : public Output_section_data | |
2225 | { | |
2226 | public: | |
8825ac63 | 2227 | // The constructor clears *INPUT_SHNDXES. |
6fa2a40b | 2228 | Output_data_group(Sized_relobj_file<size, big_endian>* relobj, |
6a74a719 | 2229 | section_size_type entry_count, |
8825ac63 ILT |
2230 | elfcpp::Elf_Word flags, |
2231 | std::vector<unsigned int>* input_shndxes); | |
6a74a719 ILT |
2232 | |
2233 | void | |
2234 | do_write(Output_file*); | |
2235 | ||
7d9e3d98 ILT |
2236 | // Write to a map file. |
2237 | void | |
2238 | do_print_to_mapfile(Mapfile* mapfile) const | |
2239 | { mapfile->print_output_data(this, _("** group")); } | |
2240 | ||
20e6d0d6 DK |
2241 | // Set final data size. |
2242 | void | |
2243 | set_final_data_size() | |
2244 | { this->set_data_size((this->input_shndxes_.size() + 1) * 4); } | |
2245 | ||
6a74a719 ILT |
2246 | private: |
2247 | // The input object. | |
6fa2a40b | 2248 | Sized_relobj_file<size, big_endian>* relobj_; |
6a74a719 ILT |
2249 | // The group flag word. |
2250 | elfcpp::Elf_Word flags_; | |
2251 | // The section indexes of the input sections in this group. | |
8825ac63 | 2252 | std::vector<unsigned int> input_shndxes_; |
6a74a719 ILT |
2253 | }; |
2254 | ||
dbe717ef ILT |
2255 | // Output_data_got is used to manage a GOT. Each entry in the GOT is |
2256 | // for one symbol--either a global symbol or a local symbol in an | |
ead1e424 | 2257 | // object. The target specific code adds entries to the GOT as |
83896202 ILT |
2258 | // needed. The GOT_SIZE template parameter is the size in bits of a |
2259 | // GOT entry, typically 32 or 64. | |
ead1e424 | 2260 | |
dd74ae06 CC |
2261 | class Output_data_got_base : public Output_section_data_build |
2262 | { | |
2263 | public: | |
2264 | Output_data_got_base(uint64_t align) | |
2265 | : Output_section_data_build(align) | |
2266 | { } | |
2267 | ||
2268 | Output_data_got_base(off_t data_size, uint64_t align) | |
2269 | : Output_section_data_build(data_size, align) | |
2270 | { } | |
2271 | ||
2272 | // Reserve the slot at index I in the GOT. | |
2273 | void | |
2274 | reserve_slot(unsigned int i) | |
2275 | { this->do_reserve_slot(i); } | |
2276 | ||
2277 | protected: | |
2278 | // Reserve the slot at index I in the GOT. | |
2279 | virtual void | |
2280 | do_reserve_slot(unsigned int i) = 0; | |
2281 | }; | |
2282 | ||
83896202 | 2283 | template<int got_size, bool big_endian> |
dd74ae06 | 2284 | class Output_data_got : public Output_data_got_base |
ead1e424 ILT |
2285 | { |
2286 | public: | |
83896202 | 2287 | typedef typename elfcpp::Elf_types<got_size>::Elf_Addr Valtype; |
ead1e424 | 2288 | |
7e1edb90 | 2289 | Output_data_got() |
dd74ae06 | 2290 | : Output_data_got_base(Output_data::default_alignment_for_size(got_size)), |
4829d394 | 2291 | entries_(), free_list_() |
ead1e424 ILT |
2292 | { } |
2293 | ||
4829d394 | 2294 | Output_data_got(off_t data_size) |
dd74ae06 CC |
2295 | : Output_data_got_base(data_size, |
2296 | Output_data::default_alignment_for_size(got_size)), | |
4829d394 CC |
2297 | entries_(), free_list_() |
2298 | { | |
2299 | // For an incremental update, we have an existing GOT section. | |
2300 | // Initialize the list of entries and the free list. | |
83896202 | 2301 | this->entries_.resize(data_size / (got_size / 8)); |
4829d394 CC |
2302 | this->free_list_.init(data_size, false); |
2303 | } | |
2304 | ||
dbe717ef ILT |
2305 | // Add an entry for a global symbol to the GOT. Return true if this |
2306 | // is a new GOT entry, false if the symbol was already in the GOT. | |
2307 | bool | |
0a65a3a7 | 2308 | add_global(Symbol* gsym, unsigned int got_type); |
ead1e424 | 2309 | |
7223e9ca ILT |
2310 | // Like add_global, but use the PLT offset of the global symbol if |
2311 | // it has one. | |
2312 | bool | |
2313 | add_global_plt(Symbol* gsym, unsigned int got_type); | |
2314 | ||
bd73a62d | 2315 | // Like add_global, but for a TLS symbol where the value will be |
19fec8c1 | 2316 | // offset using Target::tls_offset_for_global. |
bd73a62d AM |
2317 | bool |
2318 | add_global_tls(Symbol* gsym, unsigned int got_type) | |
2319 | { return add_global_plt(gsym, got_type); } | |
2320 | ||
7bf1f802 ILT |
2321 | // Add an entry for a global symbol to the GOT, and add a dynamic |
2322 | // relocation of type R_TYPE for the GOT entry. | |
2323 | void | |
0a65a3a7 | 2324 | add_global_with_rel(Symbol* gsym, unsigned int got_type, |
34171bc5 | 2325 | Output_data_reloc_generic* rel_dyn, unsigned int r_type); |
0a65a3a7 CC |
2326 | |
2327 | // Add a pair of entries for a global symbol to the GOT, and add | |
2328 | // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively. | |
2329 | void | |
2330 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, | |
34171bc5 | 2331 | Output_data_reloc_generic* rel_dyn, |
83896202 | 2332 | unsigned int r_type_1, unsigned int r_type_2); |
7bf1f802 | 2333 | |
e727fa71 ILT |
2334 | // Add an entry for a local symbol to the GOT. This returns true if |
2335 | // this is a new GOT entry, false if the symbol already has a GOT | |
2336 | // entry. | |
2337 | bool | |
83896202 | 2338 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type); |
ead1e424 | 2339 | |
7223e9ca ILT |
2340 | // Like add_local, but use the PLT offset of the local symbol if it |
2341 | // has one. | |
2342 | bool | |
83896202 | 2343 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type); |
7223e9ca | 2344 | |
bd73a62d | 2345 | // Like add_local, but for a TLS symbol where the value will be |
19fec8c1 | 2346 | // offset using Target::tls_offset_for_local. |
bd73a62d AM |
2347 | bool |
2348 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) | |
2349 | { return add_local_plt(object, sym_index, got_type); } | |
2350 | ||
0a65a3a7 | 2351 | // Add an entry for a local symbol to the GOT, and add a dynamic |
7bf1f802 ILT |
2352 | // relocation of type R_TYPE for the GOT entry. |
2353 | void | |
83896202 ILT |
2354 | add_local_with_rel(Relobj* object, unsigned int sym_index, |
2355 | unsigned int got_type, Output_data_reloc_generic* rel_dyn, | |
2356 | unsigned int r_type); | |
07f397ab | 2357 | |
0a65a3a7 | 2358 | // Add a pair of entries for a local symbol to the GOT, and add |
bd73a62d AM |
2359 | // a dynamic relocation of type R_TYPE using the section symbol of |
2360 | // the output section to which input section SHNDX maps, on the first. | |
2361 | // The first got entry will have a value of zero, the second the | |
2362 | // value of the local symbol. | |
7bf1f802 | 2363 | void |
83896202 ILT |
2364 | add_local_pair_with_rel(Relobj* object, unsigned int sym_index, |
2365 | unsigned int shndx, unsigned int got_type, | |
2366 | Output_data_reloc_generic* rel_dyn, | |
34171bc5 | 2367 | unsigned int r_type); |
bd73a62d AM |
2368 | |
2369 | // Add a pair of entries for a local symbol to the GOT, and add | |
2370 | // a dynamic relocation of type R_TYPE using STN_UNDEF on the first. | |
2371 | // The first got entry will have a value of zero, the second the | |
2372 | // value of the local symbol offset by Target::tls_offset_for_local. | |
2373 | void | |
2374 | add_local_tls_pair(Relobj* object, unsigned int sym_index, | |
2375 | unsigned int got_type, | |
2376 | Output_data_reloc_generic* rel_dyn, | |
2377 | unsigned int r_type); | |
7bf1f802 | 2378 | |
ead1e424 ILT |
2379 | // Add a constant to the GOT. This returns the offset of the new |
2380 | // entry from the start of the GOT. | |
2381 | unsigned int | |
2382 | add_constant(Valtype constant) | |
e84fe78f AM |
2383 | { return this->add_got_entry(Got_entry(constant)); } |
2384 | ||
2385 | // Add a pair of constants to the GOT. This returns the offset of | |
2386 | // the new entry from the start of the GOT. | |
2387 | unsigned int | |
2388 | add_constant_pair(Valtype c1, Valtype c2) | |
2389 | { return this->add_got_entry_pair(Got_entry(c1), Got_entry(c2)); } | |
ead1e424 | 2390 | |
cf43a2fe AM |
2391 | // Replace GOT entry I with a new constant. |
2392 | void | |
2393 | replace_constant(unsigned int i, Valtype constant) | |
2394 | { | |
2395 | this->replace_got_entry(i, Got_entry(constant)); | |
2396 | } | |
2397 | ||
6fa2a40b | 2398 | // Reserve a slot in the GOT for a local symbol. |
4829d394 | 2399 | void |
83896202 ILT |
2400 | reserve_local(unsigned int i, Relobj* object, unsigned int sym_index, |
2401 | unsigned int got_type); | |
4829d394 CC |
2402 | |
2403 | // Reserve a slot in the GOT for a global symbol. | |
2404 | void | |
6fa2a40b | 2405 | reserve_global(unsigned int i, Symbol* gsym, unsigned int got_type); |
4829d394 | 2406 | |
27bc2bce | 2407 | protected: |
ead1e424 ILT |
2408 | // Write out the GOT table. |
2409 | void | |
2410 | do_write(Output_file*); | |
2411 | ||
7d9e3d98 ILT |
2412 | // Write to a map file. |
2413 | void | |
2414 | do_print_to_mapfile(Mapfile* mapfile) const | |
2415 | { mapfile->print_output_data(this, _("** GOT")); } | |
2416 | ||
dd74ae06 CC |
2417 | // Reserve the slot at index I in the GOT. |
2418 | virtual void | |
2419 | do_reserve_slot(unsigned int i) | |
2420 | { this->free_list_.remove(i * got_size / 8, (i + 1) * got_size / 8); } | |
2421 | ||
cf43a2fe AM |
2422 | // Return the number of words in the GOT. |
2423 | unsigned int | |
2424 | num_entries () const | |
2425 | { return this->entries_.size(); } | |
2426 | ||
2427 | // Return the offset into the GOT of GOT entry I. | |
2428 | unsigned int | |
2429 | got_offset(unsigned int i) const | |
2430 | { return i * (got_size / 8); } | |
2431 | ||
ead1e424 ILT |
2432 | private: |
2433 | // This POD class holds a single GOT entry. | |
2434 | class Got_entry | |
2435 | { | |
2436 | public: | |
2437 | // Create a zero entry. | |
2438 | Got_entry() | |
bd73a62d | 2439 | : local_sym_index_(RESERVED_CODE), use_plt_or_tls_offset_(false) |
ead1e424 ILT |
2440 | { this->u_.constant = 0; } |
2441 | ||
2442 | // Create a global symbol entry. | |
bd73a62d AM |
2443 | Got_entry(Symbol* gsym, bool use_plt_or_tls_offset) |
2444 | : local_sym_index_(GSYM_CODE), | |
2445 | use_plt_or_tls_offset_(use_plt_or_tls_offset) | |
ead1e424 ILT |
2446 | { this->u_.gsym = gsym; } |
2447 | ||
2448 | // Create a local symbol entry. | |
83896202 | 2449 | Got_entry(Relobj* object, unsigned int local_sym_index, |
bd73a62d AM |
2450 | bool use_plt_or_tls_offset) |
2451 | : local_sym_index_(local_sym_index), | |
2452 | use_plt_or_tls_offset_(use_plt_or_tls_offset) | |
ead1e424 | 2453 | { |
a3ad94ed | 2454 | gold_assert(local_sym_index != GSYM_CODE |
7223e9ca | 2455 | && local_sym_index != CONSTANT_CODE |
4829d394 | 2456 | && local_sym_index != RESERVED_CODE |
7223e9ca | 2457 | && local_sym_index == this->local_sym_index_); |
ead1e424 ILT |
2458 | this->u_.object = object; |
2459 | } | |
2460 | ||
2461 | // Create a constant entry. The constant is a host value--it will | |
2462 | // be swapped, if necessary, when it is written out. | |
a3ad94ed | 2463 | explicit Got_entry(Valtype constant) |
bd73a62d | 2464 | : local_sym_index_(CONSTANT_CODE), use_plt_or_tls_offset_(false) |
ead1e424 ILT |
2465 | { this->u_.constant = constant; } |
2466 | ||
2467 | // Write the GOT entry to an output view. | |
2468 | void | |
bd73a62d | 2469 | write(unsigned int got_indx, unsigned char* pov) const; |
ead1e424 ILT |
2470 | |
2471 | private: | |
2472 | enum | |
2473 | { | |
7223e9ca | 2474 | GSYM_CODE = 0x7fffffff, |
4829d394 CC |
2475 | CONSTANT_CODE = 0x7ffffffe, |
2476 | RESERVED_CODE = 0x7ffffffd | |
ead1e424 ILT |
2477 | }; |
2478 | ||
2479 | union | |
2480 | { | |
2481 | // For a local symbol, the object. | |
83896202 | 2482 | Relobj* object; |
ead1e424 ILT |
2483 | // For a global symbol, the symbol. |
2484 | Symbol* gsym; | |
2485 | // For a constant, the constant. | |
2486 | Valtype constant; | |
2487 | } u_; | |
c06b7b0b ILT |
2488 | // For a local symbol, the local symbol index. This is GSYM_CODE |
2489 | // for a global symbol, or CONSTANT_CODE for a constant. | |
7223e9ca ILT |
2490 | unsigned int local_sym_index_ : 31; |
2491 | // Whether to use the PLT offset of the symbol if it has one. | |
bd73a62d AM |
2492 | // For TLS symbols, whether to offset the symbol value. |
2493 | bool use_plt_or_tls_offset_ : 1; | |
ead1e424 ILT |
2494 | }; |
2495 | ||
2496 | typedef std::vector<Got_entry> Got_entries; | |
2497 | ||
4829d394 CC |
2498 | // Create a new GOT entry and return its offset. |
2499 | unsigned int | |
2500 | add_got_entry(Got_entry got_entry); | |
2501 | ||
2502 | // Create a pair of new GOT entries and return the offset of the first. | |
2503 | unsigned int | |
2504 | add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2); | |
2505 | ||
cf43a2fe AM |
2506 | // Replace GOT entry I with a new value. |
2507 | void | |
2508 | replace_got_entry(unsigned int i, Got_entry got_entry); | |
ead1e424 ILT |
2509 | |
2510 | // Return the offset into the GOT of the last entry added. | |
2511 | unsigned int | |
2512 | last_got_offset() const | |
cf43a2fe | 2513 | { return this->got_offset(this->num_entries() - 1); } |
ead1e424 ILT |
2514 | |
2515 | // Set the size of the section. | |
2516 | void | |
2517 | set_got_size() | |
cf43a2fe | 2518 | { this->set_current_data_size(this->got_offset(this->num_entries())); } |
ead1e424 ILT |
2519 | |
2520 | // The list of GOT entries. | |
2521 | Got_entries entries_; | |
4829d394 CC |
2522 | |
2523 | // List of available regions within the section, for incremental | |
2524 | // update links. | |
2525 | Free_list free_list_; | |
ead1e424 ILT |
2526 | }; |
2527 | ||
a3ad94ed ILT |
2528 | // Output_data_dynamic is used to hold the data in SHT_DYNAMIC |
2529 | // section. | |
2530 | ||
2531 | class Output_data_dynamic : public Output_section_data | |
2532 | { | |
2533 | public: | |
9025d29d | 2534 | Output_data_dynamic(Stringpool* pool) |
730cdc88 | 2535 | : Output_section_data(Output_data::default_alignment()), |
9025d29d | 2536 | entries_(), pool_(pool) |
a3ad94ed ILT |
2537 | { } |
2538 | ||
2539 | // Add a new dynamic entry with a fixed numeric value. | |
2540 | void | |
2541 | add_constant(elfcpp::DT tag, unsigned int val) | |
2542 | { this->add_entry(Dynamic_entry(tag, val)); } | |
2543 | ||
16649710 | 2544 | // Add a new dynamic entry with the address of output data. |
a3ad94ed | 2545 | void |
16649710 ILT |
2546 | add_section_address(elfcpp::DT tag, const Output_data* od) |
2547 | { this->add_entry(Dynamic_entry(tag, od, false)); } | |
a3ad94ed | 2548 | |
c2b45e22 CC |
2549 | // Add a new dynamic entry with the address of output data |
2550 | // plus a constant offset. | |
2551 | void | |
2552 | add_section_plus_offset(elfcpp::DT tag, const Output_data* od, | |
34171bc5 | 2553 | unsigned int offset) |
2ea97941 | 2554 | { this->add_entry(Dynamic_entry(tag, od, offset)); } |
c2b45e22 | 2555 | |
16649710 | 2556 | // Add a new dynamic entry with the size of output data. |
a3ad94ed | 2557 | void |
16649710 ILT |
2558 | add_section_size(elfcpp::DT tag, const Output_data* od) |
2559 | { this->add_entry(Dynamic_entry(tag, od, true)); } | |
a3ad94ed | 2560 | |
612a8d3d DM |
2561 | // Add a new dynamic entry with the total size of two output datas. |
2562 | void | |
2563 | add_section_size(elfcpp::DT tag, const Output_data* od, | |
2564 | const Output_data* od2) | |
2565 | { this->add_entry(Dynamic_entry(tag, od, od2)); } | |
2566 | ||
a3ad94ed ILT |
2567 | // Add a new dynamic entry with the address of a symbol. |
2568 | void | |
16649710 | 2569 | add_symbol(elfcpp::DT tag, const Symbol* sym) |
a3ad94ed ILT |
2570 | { this->add_entry(Dynamic_entry(tag, sym)); } |
2571 | ||
2572 | // Add a new dynamic entry with a string. | |
2573 | void | |
2574 | add_string(elfcpp::DT tag, const char* str) | |
cfd73a4e | 2575 | { this->add_entry(Dynamic_entry(tag, this->pool_->add(str, true, NULL))); } |
a3ad94ed | 2576 | |
41f542e7 ILT |
2577 | void |
2578 | add_string(elfcpp::DT tag, const std::string& str) | |
2579 | { this->add_string(tag, str.c_str()); } | |
2580 | ||
27bc2bce ILT |
2581 | protected: |
2582 | // Adjust the output section to set the entry size. | |
2583 | void | |
2584 | do_adjust_output_section(Output_section*); | |
2585 | ||
a3ad94ed ILT |
2586 | // Set the final data size. |
2587 | void | |
27bc2bce | 2588 | set_final_data_size(); |
a3ad94ed ILT |
2589 | |
2590 | // Write out the dynamic entries. | |
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, _("** dynamic")); } | |
2598 | ||
a3ad94ed ILT |
2599 | private: |
2600 | // This POD class holds a single dynamic entry. | |
2601 | class Dynamic_entry | |
2602 | { | |
2603 | public: | |
2604 | // Create an entry with a fixed numeric value. | |
2ea97941 ILT |
2605 | Dynamic_entry(elfcpp::DT tag, unsigned int val) |
2606 | : tag_(tag), offset_(DYNAMIC_NUMBER) | |
a3ad94ed ILT |
2607 | { this->u_.val = val; } |
2608 | ||
2609 | // Create an entry with the size or address of a section. | |
2ea97941 ILT |
2610 | Dynamic_entry(elfcpp::DT tag, const Output_data* od, bool section_size) |
2611 | : tag_(tag), | |
c2b45e22 CC |
2612 | offset_(section_size |
2613 | ? DYNAMIC_SECTION_SIZE | |
2614 | : DYNAMIC_SECTION_ADDRESS) | |
612a8d3d DM |
2615 | { |
2616 | this->u_.od = od; | |
2617 | this->od2 = NULL; | |
2618 | } | |
2619 | ||
2620 | // Create an entry with the size of two sections. | |
2621 | Dynamic_entry(elfcpp::DT tag, const Output_data* od, const Output_data* od2) | |
2622 | : tag_(tag), | |
2623 | offset_(DYNAMIC_SECTION_SIZE) | |
2624 | { | |
2625 | this->u_.od = od; | |
2626 | this->od2 = od2; | |
2627 | } | |
c2b45e22 CC |
2628 | |
2629 | // Create an entry with the address of a section plus a constant offset. | |
2ea97941 ILT |
2630 | Dynamic_entry(elfcpp::DT tag, const Output_data* od, unsigned int offset) |
2631 | : tag_(tag), | |
c2b45e22 | 2632 | offset_(offset) |
16649710 | 2633 | { this->u_.od = od; } |
a3ad94ed ILT |
2634 | |
2635 | // Create an entry with the address of a symbol. | |
2ea97941 ILT |
2636 | Dynamic_entry(elfcpp::DT tag, const Symbol* sym) |
2637 | : tag_(tag), offset_(DYNAMIC_SYMBOL) | |
a3ad94ed ILT |
2638 | { this->u_.sym = sym; } |
2639 | ||
2640 | // Create an entry with a string. | |
2ea97941 ILT |
2641 | Dynamic_entry(elfcpp::DT tag, const char* str) |
2642 | : tag_(tag), offset_(DYNAMIC_STRING) | |
a3ad94ed ILT |
2643 | { this->u_.str = str; } |
2644 | ||
20e6d0d6 DK |
2645 | // Return the tag of this entry. |
2646 | elfcpp::DT | |
2647 | tag() const | |
2648 | { return this->tag_; } | |
2649 | ||
a3ad94ed ILT |
2650 | // Write the dynamic entry to an output view. |
2651 | template<int size, bool big_endian> | |
2652 | void | |
7d1a9ebb | 2653 | write(unsigned char* pov, const Stringpool*) const; |
a3ad94ed ILT |
2654 | |
2655 | private: | |
c2b45e22 | 2656 | // Classification is encoded in the OFFSET field. |
a3ad94ed ILT |
2657 | enum Classification |
2658 | { | |
a3ad94ed | 2659 | // Section address. |
c2b45e22 CC |
2660 | DYNAMIC_SECTION_ADDRESS = 0, |
2661 | // Number. | |
2662 | DYNAMIC_NUMBER = -1U, | |
a3ad94ed | 2663 | // Section size. |
c2b45e22 | 2664 | DYNAMIC_SECTION_SIZE = -2U, |
a3ad94ed | 2665 | // Symbol adress. |
c2b45e22 | 2666 | DYNAMIC_SYMBOL = -3U, |
a3ad94ed | 2667 | // String. |
c2b45e22 CC |
2668 | DYNAMIC_STRING = -4U |
2669 | // Any other value indicates a section address plus OFFSET. | |
a3ad94ed ILT |
2670 | }; |
2671 | ||
2672 | union | |
2673 | { | |
2674 | // For DYNAMIC_NUMBER. | |
2675 | unsigned int val; | |
c2b45e22 | 2676 | // For DYNAMIC_SECTION_SIZE and section address plus OFFSET. |
16649710 | 2677 | const Output_data* od; |
a3ad94ed | 2678 | // For DYNAMIC_SYMBOL. |
16649710 | 2679 | const Symbol* sym; |
a3ad94ed ILT |
2680 | // For DYNAMIC_STRING. |
2681 | const char* str; | |
2682 | } u_; | |
612a8d3d DM |
2683 | // For DYNAMIC_SYMBOL with two sections. |
2684 | const Output_data* od2; | |
a3ad94ed ILT |
2685 | // The dynamic tag. |
2686 | elfcpp::DT tag_; | |
c2b45e22 CC |
2687 | // The type of entry (Classification) or offset within a section. |
2688 | unsigned int offset_; | |
a3ad94ed ILT |
2689 | }; |
2690 | ||
2691 | // Add an entry to the list. | |
2692 | void | |
2693 | add_entry(const Dynamic_entry& entry) | |
2694 | { this->entries_.push_back(entry); } | |
2695 | ||
2696 | // Sized version of write function. | |
2697 | template<int size, bool big_endian> | |
2698 | void | |
2699 | sized_write(Output_file* of); | |
2700 | ||
2701 | // The type of the list of entries. | |
2702 | typedef std::vector<Dynamic_entry> Dynamic_entries; | |
2703 | ||
a3ad94ed ILT |
2704 | // The entries. |
2705 | Dynamic_entries entries_; | |
2706 | // The pool used for strings. | |
2707 | Stringpool* pool_; | |
2708 | }; | |
2709 | ||
d491d34e ILT |
2710 | // Output_symtab_xindex is used to handle SHT_SYMTAB_SHNDX sections, |
2711 | // which may be required if the object file has more than | |
2712 | // SHN_LORESERVE sections. | |
2713 | ||
2714 | class Output_symtab_xindex : public Output_section_data | |
2715 | { | |
2716 | public: | |
2717 | Output_symtab_xindex(size_t symcount) | |
20e6d0d6 | 2718 | : Output_section_data(symcount * 4, 4, true), |
d491d34e ILT |
2719 | entries_() |
2720 | { } | |
2721 | ||
2722 | // Add an entry: symbol number SYMNDX has section SHNDX. | |
2723 | void | |
2724 | add(unsigned int symndx, unsigned int shndx) | |
2725 | { this->entries_.push_back(std::make_pair(symndx, shndx)); } | |
2726 | ||
2727 | protected: | |
2728 | void | |
2729 | do_write(Output_file*); | |
2730 | ||
7d9e3d98 ILT |
2731 | // Write to a map file. |
2732 | void | |
2733 | do_print_to_mapfile(Mapfile* mapfile) const | |
2734 | { mapfile->print_output_data(this, _("** symtab xindex")); } | |
2735 | ||
d491d34e ILT |
2736 | private: |
2737 | template<bool big_endian> | |
2738 | void | |
2739 | endian_do_write(unsigned char*); | |
2740 | ||
2741 | // It is likely that most symbols will not require entries. Rather | |
2742 | // than keep a vector for all symbols, we keep pairs of symbol index | |
2743 | // and section index. | |
2744 | typedef std::vector<std::pair<unsigned int, unsigned int> > Xindex_entries; | |
2745 | ||
2746 | // The entries we need. | |
2747 | Xindex_entries entries_; | |
2748 | }; | |
2749 | ||
20e6d0d6 | 2750 | // A relaxed input section. |
c0a62865 | 2751 | class Output_relaxed_input_section : public Output_section_data_build |
20e6d0d6 DK |
2752 | { |
2753 | public: | |
2754 | // We would like to call relobj->section_addralign(shndx) to get the | |
2755 | // alignment but we do not want the constructor to fail. So callers | |
2756 | // are repsonsible for ensuring that. | |
2ea97941 ILT |
2757 | Output_relaxed_input_section(Relobj* relobj, unsigned int shndx, |
2758 | uint64_t addralign) | |
2759 | : Output_section_data_build(addralign), relobj_(relobj), shndx_(shndx) | |
20e6d0d6 | 2760 | { } |
34171bc5 | 2761 | |
20e6d0d6 DK |
2762 | // Return the Relobj of this relaxed input section. |
2763 | Relobj* | |
2764 | relobj() const | |
2765 | { return this->relobj_; } | |
34171bc5 | 2766 | |
20e6d0d6 DK |
2767 | // Return the section index of this relaxed input section. |
2768 | unsigned int | |
2769 | shndx() const | |
2770 | { return this->shndx_; } | |
2771 | ||
ec661b9d AM |
2772 | protected: |
2773 | void | |
2774 | set_relobj(Relobj* relobj) | |
2775 | { this->relobj_ = relobj; } | |
2776 | ||
2777 | void | |
2778 | set_shndx(unsigned int shndx) | |
2779 | { this->shndx_ = shndx; } | |
2780 | ||
20e6d0d6 DK |
2781 | private: |
2782 | Relobj* relobj_; | |
2783 | unsigned int shndx_; | |
2784 | }; | |
2785 | ||
0439c796 DK |
2786 | // This class describes properties of merge data sections. It is used |
2787 | // as a key type for maps. | |
2788 | class Merge_section_properties | |
2789 | { | |
2790 | public: | |
2791 | Merge_section_properties(bool is_string, uint64_t entsize, | |
2792 | uint64_t addralign) | |
2793 | : is_string_(is_string), entsize_(entsize), addralign_(addralign) | |
2794 | { } | |
2795 | ||
2796 | // Whether this equals to another Merge_section_properties MSP. | |
2797 | bool | |
2798 | eq(const Merge_section_properties& msp) const | |
2799 | { | |
2800 | return ((this->is_string_ == msp.is_string_) | |
2801 | && (this->entsize_ == msp.entsize_) | |
2802 | && (this->addralign_ == msp.addralign_)); | |
2803 | } | |
2804 | ||
2805 | // Compute a hash value for this using 64-bit FNV-1a hash. | |
2806 | size_t | |
2807 | hash_value() const | |
2808 | { | |
2809 | uint64_t h = 14695981039346656037ULL; // FNV offset basis. | |
2810 | uint64_t prime = 1099511628211ULL; | |
2811 | h = (h ^ static_cast<uint64_t>(this->is_string_)) * prime; | |
2812 | h = (h ^ static_cast<uint64_t>(this->entsize_)) * prime; | |
2813 | h = (h ^ static_cast<uint64_t>(this->addralign_)) * prime; | |
2814 | return h; | |
2815 | } | |
34171bc5 | 2816 | |
0439c796 DK |
2817 | // Functors for associative containers. |
2818 | struct equal_to | |
2819 | { | |
2820 | bool | |
2821 | operator()(const Merge_section_properties& msp1, | |
2822 | const Merge_section_properties& msp2) const | |
2823 | { return msp1.eq(msp2); } | |
2824 | }; | |
2825 | ||
2826 | struct hash | |
2827 | { | |
2828 | size_t | |
2829 | operator()(const Merge_section_properties& msp) const | |
2830 | { return msp.hash_value(); } | |
2831 | }; | |
2832 | ||
2833 | private: | |
2834 | // Whether this merge data section is for strings. | |
2835 | bool is_string_; | |
2836 | // Entsize of this merge data section. | |
2837 | uint64_t entsize_; | |
2838 | // Address alignment. | |
2839 | uint64_t addralign_; | |
2840 | }; | |
2841 | ||
2842 | // This class is used to speed up look up of special input sections in an | |
2843 | // Output_section. | |
2844 | ||
2845 | class Output_section_lookup_maps | |
2846 | { | |
2847 | public: | |
2848 | Output_section_lookup_maps() | |
2849 | : is_valid_(true), merge_sections_by_properties_(), | |
2850 | merge_sections_by_id_(), relaxed_input_sections_by_id_() | |
2851 | { } | |
2852 | ||
2853 | // Whether the maps are valid. | |
2854 | bool | |
2855 | is_valid() const | |
2856 | { return this->is_valid_; } | |
2857 | ||
2858 | // Invalidate the maps. | |
2859 | void | |
2860 | invalidate() | |
2861 | { this->is_valid_ = false; } | |
2862 | ||
2863 | // Clear the maps. | |
2864 | void | |
2865 | clear() | |
2866 | { | |
2867 | this->merge_sections_by_properties_.clear(); | |
2868 | this->merge_sections_by_id_.clear(); | |
2869 | this->relaxed_input_sections_by_id_.clear(); | |
2870 | // A cleared map is valid. | |
2871 | this->is_valid_ = true; | |
2872 | } | |
34171bc5 | 2873 | |
0439c796 DK |
2874 | // Find a merge section by merge section properties. Return NULL if none |
2875 | // is found. | |
2876 | Output_merge_base* | |
2877 | find_merge_section(const Merge_section_properties& msp) const | |
2878 | { | |
2879 | gold_assert(this->is_valid_); | |
2880 | Merge_sections_by_properties::const_iterator p = | |
2881 | this->merge_sections_by_properties_.find(msp); | |
2882 | return p != this->merge_sections_by_properties_.end() ? p->second : NULL; | |
2883 | } | |
2884 | ||
2885 | // Find a merge section by section ID of a merge input section. Return NULL | |
2886 | // if none is found. | |
2887 | Output_merge_base* | |
2888 | find_merge_section(const Object* object, unsigned int shndx) const | |
2889 | { | |
2890 | gold_assert(this->is_valid_); | |
2891 | Merge_sections_by_id::const_iterator p = | |
2892 | this->merge_sections_by_id_.find(Const_section_id(object, shndx)); | |
2893 | return p != this->merge_sections_by_id_.end() ? p->second : NULL; | |
2894 | } | |
2895 | ||
2896 | // Add a merge section pointed by POMB with properties MSP. | |
2897 | void | |
2898 | add_merge_section(const Merge_section_properties& msp, | |
2899 | Output_merge_base* pomb) | |
2900 | { | |
2901 | std::pair<Merge_section_properties, Output_merge_base*> value(msp, pomb); | |
2902 | std::pair<Merge_sections_by_properties::iterator, bool> result = | |
2903 | this->merge_sections_by_properties_.insert(value); | |
82742395 | 2904 | gold_assert(result.second); |
0439c796 | 2905 | } |
34171bc5 | 2906 | |
0439c796 DK |
2907 | // Add a mapping from a merged input section in OBJECT with index SHNDX |
2908 | // to a merge output section pointed by POMB. | |
2909 | void | |
2910 | add_merge_input_section(const Object* object, unsigned int shndx, | |
2911 | Output_merge_base* pomb) | |
2912 | { | |
2913 | Const_section_id csid(object, shndx); | |
2914 | std::pair<Const_section_id, Output_merge_base*> value(csid, pomb); | |
2915 | std::pair<Merge_sections_by_id::iterator, bool> result = | |
2916 | this->merge_sections_by_id_.insert(value); | |
82742395 | 2917 | gold_assert(result.second); |
0439c796 DK |
2918 | } |
2919 | ||
2920 | // Find a relaxed input section of OBJECT with index SHNDX. | |
2921 | Output_relaxed_input_section* | |
2922 | find_relaxed_input_section(const Object* object, unsigned int shndx) const | |
2923 | { | |
2924 | gold_assert(this->is_valid_); | |
2925 | Relaxed_input_sections_by_id::const_iterator p = | |
2926 | this->relaxed_input_sections_by_id_.find(Const_section_id(object, shndx)); | |
2927 | return p != this->relaxed_input_sections_by_id_.end() ? p->second : NULL; | |
2928 | } | |
2929 | ||
2930 | // Add a relaxed input section pointed by POMB and whose original input | |
2931 | // section is in OBJECT with index SHNDX. | |
2932 | void | |
2933 | add_relaxed_input_section(const Relobj* relobj, unsigned int shndx, | |
2934 | Output_relaxed_input_section* poris) | |
2935 | { | |
2936 | Const_section_id csid(relobj, shndx); | |
2937 | std::pair<Const_section_id, Output_relaxed_input_section*> | |
2938 | value(csid, poris); | |
2939 | std::pair<Relaxed_input_sections_by_id::iterator, bool> result = | |
2940 | this->relaxed_input_sections_by_id_.insert(value); | |
82742395 | 2941 | gold_assert(result.second); |
0439c796 DK |
2942 | } |
2943 | ||
2944 | private: | |
2945 | typedef Unordered_map<Const_section_id, Output_merge_base*, | |
2946 | Const_section_id_hash> | |
2947 | Merge_sections_by_id; | |
2948 | ||
2949 | typedef Unordered_map<Merge_section_properties, Output_merge_base*, | |
2950 | Merge_section_properties::hash, | |
2951 | Merge_section_properties::equal_to> | |
2952 | Merge_sections_by_properties; | |
2953 | ||
2954 | typedef Unordered_map<Const_section_id, Output_relaxed_input_section*, | |
2955 | Const_section_id_hash> | |
2956 | Relaxed_input_sections_by_id; | |
2957 | ||
2958 | // Whether this is valid | |
2959 | bool is_valid_; | |
2960 | // Merge sections by merge section properties. | |
2961 | Merge_sections_by_properties merge_sections_by_properties_; | |
2962 | // Merge sections by section IDs. | |
2963 | Merge_sections_by_id merge_sections_by_id_; | |
2964 | // Relaxed sections by section IDs. | |
2965 | Relaxed_input_sections_by_id relaxed_input_sections_by_id_; | |
2966 | }; | |
2967 | ||
8ea8cd50 CC |
2968 | // This abstract base class defines the interface for the |
2969 | // types of methods used to fill free space left in an output | |
2970 | // section during an incremental link. These methods are used | |
2971 | // to insert dummy compilation units into debug info so that | |
2972 | // debug info consumers can scan the debug info serially. | |
2973 | ||
2974 | class Output_fill | |
2975 | { | |
2976 | public: | |
2977 | Output_fill() | |
2978 | : is_big_endian_(parameters->target().is_big_endian()) | |
2979 | { } | |
2980 | ||
81c82a68 ILT |
2981 | virtual |
2982 | ~Output_fill() | |
2983 | { } | |
2984 | ||
8ea8cd50 CC |
2985 | // Return the smallest size chunk of free space that can be |
2986 | // filled with a dummy compilation unit. | |
2987 | size_t | |
2988 | minimum_hole_size() const | |
2989 | { return this->do_minimum_hole_size(); } | |
2990 | ||
2991 | // Write a fill pattern of length LEN at offset OFF in the file. | |
2992 | void | |
2993 | write(Output_file* of, off_t off, size_t len) const | |
2994 | { this->do_write(of, off, len); } | |
2995 | ||
2996 | protected: | |
2997 | virtual size_t | |
2998 | do_minimum_hole_size() const = 0; | |
2999 | ||
3000 | virtual void | |
3001 | do_write(Output_file* of, off_t off, size_t len) const = 0; | |
3002 | ||
3003 | bool | |
3004 | is_big_endian() const | |
3005 | { return this->is_big_endian_; } | |
3006 | ||
3007 | private: | |
3008 | bool is_big_endian_; | |
3009 | }; | |
3010 | ||
3011 | // Fill method that introduces a dummy compilation unit in | |
3012 | // a .debug_info or .debug_types section. | |
3013 | ||
3014 | class Output_fill_debug_info : public Output_fill | |
3015 | { | |
3016 | public: | |
3017 | Output_fill_debug_info(bool is_debug_types) | |
3018 | : is_debug_types_(is_debug_types) | |
3019 | { } | |
3020 | ||
3021 | protected: | |
3022 | virtual size_t | |
3023 | do_minimum_hole_size() const; | |
3024 | ||
3025 | virtual void | |
3026 | do_write(Output_file* of, off_t off, size_t len) const; | |
3027 | ||
3028 | private: | |
3029 | // Version of the header. | |
3030 | static const int version = 4; | |
3031 | // True if this is a .debug_types section. | |
3032 | bool is_debug_types_; | |
3033 | }; | |
3034 | ||
3035 | // Fill method that introduces a dummy compilation unit in | |
3036 | // a .debug_line section. | |
3037 | ||
3038 | class Output_fill_debug_line : public Output_fill | |
3039 | { | |
3040 | public: | |
3041 | Output_fill_debug_line() | |
3042 | { } | |
3043 | ||
3044 | protected: | |
3045 | virtual size_t | |
3046 | do_minimum_hole_size() const; | |
3047 | ||
3048 | virtual void | |
3049 | do_write(Output_file* of, off_t off, size_t len) const; | |
3050 | ||
3051 | private: | |
3052 | // Version of the header. We write a DWARF-3 header because it's smaller | |
3053 | // and many tools have not yet been updated to understand the DWARF-4 header. | |
3054 | static const int version = 3; | |
3055 | // Length of the portion of the header that follows the header_length | |
3056 | // field. This includes the following fields: | |
3057 | // minimum_instruction_length, default_is_stmt, line_base, line_range, | |
3058 | // opcode_base, standard_opcode_lengths[], include_directories, filenames. | |
3059 | // The standard_opcode_lengths array is 12 bytes long, and the | |
3060 | // include_directories and filenames fields each contain only a single | |
3061 | // null byte. | |
3062 | static const size_t header_length = 19; | |
3063 | }; | |
3064 | ||
a2fb1b05 ILT |
3065 | // An output section. We don't expect to have too many output |
3066 | // sections, so we don't bother to do a template on the size. | |
3067 | ||
54dc6425 | 3068 | class Output_section : public Output_data |
a2fb1b05 ILT |
3069 | { |
3070 | public: | |
3071 | // Create an output section, giving the name, type, and flags. | |
96803768 | 3072 | Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword); |
54dc6425 | 3073 | virtual ~Output_section(); |
a2fb1b05 | 3074 | |
ead1e424 | 3075 | // Add a new input section SHNDX, named NAME, with header SHDR, from |
730cdc88 | 3076 | // object OBJECT. RELOC_SHNDX is the index of a relocation section |
eff45813 | 3077 | // which applies to this section, or 0 if none, or -1 if more than |
a445fddf ILT |
3078 | // one. HAVE_SECTIONS_SCRIPT is true if we have a SECTIONS clause |
3079 | // in a linker script; in that case we need to keep track of input | |
3080 | // sections associated with an output section. Return the offset | |
3081 | // within the output section. | |
a2fb1b05 ILT |
3082 | template<int size, bool big_endian> |
3083 | off_t | |
6fa2a40b | 3084 | add_input_section(Layout* layout, Sized_relobj_file<size, big_endian>* object, |
34171bc5 | 3085 | unsigned int shndx, const char* name, |
730cdc88 | 3086 | const elfcpp::Shdr<size, big_endian>& shdr, |
a445fddf | 3087 | unsigned int reloc_shndx, bool have_sections_script); |
a2fb1b05 | 3088 | |
b8e6aad9 | 3089 | // Add generated data POSD to this output section. |
c06b7b0b | 3090 | void |
ead1e424 ILT |
3091 | add_output_section_data(Output_section_data* posd); |
3092 | ||
d06fb4d1 DK |
3093 | // Add a relaxed input section PORIS called NAME to this output section |
3094 | // with LAYOUT. | |
c0a62865 | 3095 | void |
d06fb4d1 DK |
3096 | add_relaxed_input_section(Layout* layout, |
3097 | Output_relaxed_input_section* poris, | |
3098 | const std::string& name); | |
c0a62865 | 3099 | |
a2fb1b05 ILT |
3100 | // Return the section name. |
3101 | const char* | |
3102 | name() const | |
3103 | { return this->name_; } | |
3104 | ||
3105 | // Return the section type. | |
3106 | elfcpp::Elf_Word | |
3107 | type() const | |
3108 | { return this->type_; } | |
3109 | ||
3110 | // Return the section flags. | |
3111 | elfcpp::Elf_Xword | |
3112 | flags() const | |
3113 | { return this->flags_; } | |
3114 | ||
e9552f7e ST |
3115 | typedef std::map<Section_id, unsigned int> Section_layout_order; |
3116 | ||
3117 | void | |
f0558624 | 3118 | update_section_layout(const Section_layout_order* order_map); |
e9552f7e | 3119 | |
154e0e9a ILT |
3120 | // Update the output section flags based on input section flags. |
3121 | void | |
9c547ec3 | 3122 | update_flags_for_input_section(elfcpp::Elf_Xword flags); |
154e0e9a | 3123 | |
a3ad94ed ILT |
3124 | // Return the entsize field. |
3125 | uint64_t | |
3126 | entsize() const | |
3127 | { return this->entsize_; } | |
3128 | ||
61ba1cf9 ILT |
3129 | // Set the entsize field. |
3130 | void | |
16649710 | 3131 | set_entsize(uint64_t v); |
61ba1cf9 | 3132 | |
a445fddf ILT |
3133 | // Set the load address. |
3134 | void | |
2ea97941 | 3135 | set_load_address(uint64_t load_address) |
a445fddf | 3136 | { |
2ea97941 | 3137 | this->load_address_ = load_address; |
a445fddf ILT |
3138 | this->has_load_address_ = true; |
3139 | } | |
3140 | ||
16649710 ILT |
3141 | // Set the link field to the output section index of a section. |
3142 | void | |
14b31740 | 3143 | set_link_section(const Output_data* od) |
16649710 ILT |
3144 | { |
3145 | gold_assert(this->link_ == 0 | |
3146 | && !this->should_link_to_symtab_ | |
3147 | && !this->should_link_to_dynsym_); | |
3148 | this->link_section_ = od; | |
3149 | } | |
3150 | ||
3151 | // Set the link field to a constant. | |
61ba1cf9 ILT |
3152 | void |
3153 | set_link(unsigned int v) | |
16649710 ILT |
3154 | { |
3155 | gold_assert(this->link_section_ == NULL | |
3156 | && !this->should_link_to_symtab_ | |
3157 | && !this->should_link_to_dynsym_); | |
3158 | this->link_ = v; | |
3159 | } | |
61ba1cf9 | 3160 | |
16649710 ILT |
3161 | // Record that this section should link to the normal symbol table. |
3162 | void | |
3163 | set_should_link_to_symtab() | |
3164 | { | |
3165 | gold_assert(this->link_section_ == NULL | |
3166 | && this->link_ == 0 | |
3167 | && !this->should_link_to_dynsym_); | |
3168 | this->should_link_to_symtab_ = true; | |
3169 | } | |
3170 | ||
3171 | // Record that this section should link to the dynamic symbol table. | |
3172 | void | |
3173 | set_should_link_to_dynsym() | |
3174 | { | |
3175 | gold_assert(this->link_section_ == NULL | |
3176 | && this->link_ == 0 | |
3177 | && !this->should_link_to_symtab_); | |
3178 | this->should_link_to_dynsym_ = true; | |
3179 | } | |
3180 | ||
3181 | // Return the info field. | |
3182 | unsigned int | |
3183 | info() const | |
3184 | { | |
755ab8af ILT |
3185 | gold_assert(this->info_section_ == NULL |
3186 | && this->info_symndx_ == NULL); | |
16649710 ILT |
3187 | return this->info_; |
3188 | } | |
3189 | ||
3190 | // Set the info field to the output section index of a section. | |
3191 | void | |
755ab8af | 3192 | set_info_section(const Output_section* os) |
16649710 | 3193 | { |
755ab8af ILT |
3194 | gold_assert((this->info_section_ == NULL |
3195 | || (this->info_section_ == os | |
3196 | && this->info_uses_section_index_)) | |
3197 | && this->info_symndx_ == NULL | |
3198 | && this->info_ == 0); | |
3199 | this->info_section_ = os; | |
3200 | this->info_uses_section_index_= true; | |
16649710 ILT |
3201 | } |
3202 | ||
6a74a719 ILT |
3203 | // Set the info field to the symbol table index of a symbol. |
3204 | void | |
3205 | set_info_symndx(const Symbol* sym) | |
3206 | { | |
755ab8af ILT |
3207 | gold_assert(this->info_section_ == NULL |
3208 | && (this->info_symndx_ == NULL | |
3209 | || this->info_symndx_ == sym) | |
3210 | && this->info_ == 0); | |
6a74a719 ILT |
3211 | this->info_symndx_ = sym; |
3212 | } | |
3213 | ||
755ab8af ILT |
3214 | // Set the info field to the symbol table index of a section symbol. |
3215 | void | |
3216 | set_info_section_symndx(const Output_section* os) | |
3217 | { | |
3218 | gold_assert((this->info_section_ == NULL | |
3219 | || (this->info_section_ == os | |
3220 | && !this->info_uses_section_index_)) | |
3221 | && this->info_symndx_ == NULL | |
3222 | && this->info_ == 0); | |
3223 | this->info_section_ = os; | |
3224 | this->info_uses_section_index_ = false; | |
3225 | } | |
3226 | ||
16649710 | 3227 | // Set the info field to a constant. |
61ba1cf9 ILT |
3228 | void |
3229 | set_info(unsigned int v) | |
16649710 | 3230 | { |
755ab8af ILT |
3231 | gold_assert(this->info_section_ == NULL |
3232 | && this->info_symndx_ == NULL | |
3233 | && (this->info_ == 0 | |
3234 | || this->info_ == v)); | |
16649710 ILT |
3235 | this->info_ = v; |
3236 | } | |
61ba1cf9 ILT |
3237 | |
3238 | // Set the addralign field. | |
3239 | void | |
3240 | set_addralign(uint64_t v) | |
3241 | { this->addralign_ = v; } | |
3242 | ||
ec661b9d AM |
3243 | void |
3244 | checkpoint_set_addralign(uint64_t val) | |
3245 | { | |
3246 | if (this->checkpoint_ != NULL) | |
3247 | this->checkpoint_->set_addralign(val); | |
3248 | } | |
3249 | ||
d491d34e ILT |
3250 | // Whether the output section index has been set. |
3251 | bool | |
3252 | has_out_shndx() const | |
3253 | { return this->out_shndx_ != -1U; } | |
3254 | ||
c06b7b0b ILT |
3255 | // Indicate that we need a symtab index. |
3256 | void | |
3257 | set_needs_symtab_index() | |
3258 | { this->needs_symtab_index_ = true; } | |
3259 | ||
3260 | // Return whether we need a symtab index. | |
3261 | bool | |
3262 | needs_symtab_index() const | |
3263 | { return this->needs_symtab_index_; } | |
3264 | ||
3265 | // Get the symtab index. | |
3266 | unsigned int | |
3267 | symtab_index() const | |
3268 | { | |
a3ad94ed | 3269 | gold_assert(this->symtab_index_ != 0); |
c06b7b0b ILT |
3270 | return this->symtab_index_; |
3271 | } | |
3272 | ||
3273 | // Set the symtab index. | |
3274 | void | |
3275 | set_symtab_index(unsigned int index) | |
3276 | { | |
a3ad94ed | 3277 | gold_assert(index != 0); |
c06b7b0b ILT |
3278 | this->symtab_index_ = index; |
3279 | } | |
3280 | ||
3281 | // Indicate that we need a dynsym index. | |
3282 | void | |
3283 | set_needs_dynsym_index() | |
3284 | { this->needs_dynsym_index_ = true; } | |
3285 | ||
3286 | // Return whether we need a dynsym index. | |
3287 | bool | |
3288 | needs_dynsym_index() const | |
3289 | { return this->needs_dynsym_index_; } | |
3290 | ||
3291 | // Get the dynsym index. | |
3292 | unsigned int | |
3293 | dynsym_index() const | |
3294 | { | |
a3ad94ed | 3295 | gold_assert(this->dynsym_index_ != 0); |
c06b7b0b ILT |
3296 | return this->dynsym_index_; |
3297 | } | |
3298 | ||
3299 | // Set the dynsym index. | |
3300 | void | |
3301 | set_dynsym_index(unsigned int index) | |
3302 | { | |
a3ad94ed | 3303 | gold_assert(index != 0); |
c06b7b0b ILT |
3304 | this->dynsym_index_ = index; |
3305 | } | |
3306 | ||
9e9143bc ST |
3307 | // Sort the attached input sections. |
3308 | void | |
3309 | sort_attached_input_sections(); | |
3310 | ||
2fd32231 ILT |
3311 | // Return whether the input sections sections attachd to this output |
3312 | // section may require sorting. This is used to handle constructor | |
3313 | // priorities compatibly with GNU ld. | |
3314 | bool | |
3315 | may_sort_attached_input_sections() const | |
3316 | { return this->may_sort_attached_input_sections_; } | |
3317 | ||
3318 | // Record that the input sections attached to this output section | |
3319 | // may require sorting. | |
3320 | void | |
3321 | set_may_sort_attached_input_sections() | |
3322 | { this->may_sort_attached_input_sections_ = true; } | |
3323 | ||
6e9ba2ca ST |
3324 | // Returns true if input sections must be sorted according to the |
3325 | // order in which their name appear in the --section-ordering-file. | |
3326 | bool | |
3327 | input_section_order_specified() | |
3328 | { return this->input_section_order_specified_; } | |
3329 | ||
3330 | // Record that input sections must be sorted as some of their names | |
3331 | // match the patterns specified through --section-ordering-file. | |
3332 | void | |
3333 | set_input_section_order_specified() | |
3334 | { this->input_section_order_specified_ = true; } | |
3335 | ||
2fd32231 ILT |
3336 | // Return whether the input sections attached to this output section |
3337 | // require sorting. This is used to handle constructor priorities | |
3338 | // compatibly with GNU ld. | |
3339 | bool | |
3340 | must_sort_attached_input_sections() const | |
3341 | { return this->must_sort_attached_input_sections_; } | |
3342 | ||
3343 | // Record that the input sections attached to this output section | |
3344 | // require sorting. | |
3345 | void | |
3346 | set_must_sort_attached_input_sections() | |
3347 | { this->must_sort_attached_input_sections_ = true; } | |
3348 | ||
22f0da72 ILT |
3349 | // Get the order in which this section appears in the PT_LOAD output |
3350 | // segment. | |
3351 | Output_section_order | |
3352 | order() const | |
3353 | { return this->order_; } | |
3354 | ||
3355 | // Set the order for this section. | |
3356 | void | |
3357 | set_order(Output_section_order order) | |
3358 | { this->order_ = order; } | |
3359 | ||
9f1d377b ILT |
3360 | // Return whether this section holds relro data--data which has |
3361 | // dynamic relocations but which may be marked read-only after the | |
3362 | // dynamic relocations have been completed. | |
3363 | bool | |
3364 | is_relro() const | |
3365 | { return this->is_relro_; } | |
3366 | ||
3367 | // Record that this section holds relro data. | |
3368 | void | |
3369 | set_is_relro() | |
3370 | { this->is_relro_ = true; } | |
3371 | ||
2d924fd9 ILT |
3372 | // Record that this section does not hold relro data. |
3373 | void | |
3374 | clear_is_relro() | |
3375 | { this->is_relro_ = false; } | |
3376 | ||
8a5e3e08 ILT |
3377 | // True if this is a small section: a section which holds small |
3378 | // variables. | |
3379 | bool | |
3380 | is_small_section() const | |
3381 | { return this->is_small_section_; } | |
3382 | ||
3383 | // Record that this is a small section. | |
3384 | void | |
3385 | set_is_small_section() | |
3386 | { this->is_small_section_ = true; } | |
3387 | ||
3388 | // True if this is a large section: a section which holds large | |
3389 | // variables. | |
3390 | bool | |
3391 | is_large_section() const | |
3392 | { return this->is_large_section_; } | |
3393 | ||
3394 | // Record that this is a large section. | |
3395 | void | |
3396 | set_is_large_section() | |
3397 | { this->is_large_section_ = true; } | |
3398 | ||
3399 | // True if this is a large data (not BSS) section. | |
3400 | bool | |
3401 | is_large_data_section() | |
3402 | { return this->is_large_section_ && this->type_ != elfcpp::SHT_NOBITS; } | |
3403 | ||
730cdc88 ILT |
3404 | // Return whether this section should be written after all the input |
3405 | // sections are complete. | |
3406 | bool | |
3407 | after_input_sections() const | |
3408 | { return this->after_input_sections_; } | |
3409 | ||
3410 | // Record that this section should be written after all the input | |
3411 | // sections are complete. | |
3412 | void | |
3413 | set_after_input_sections() | |
3414 | { this->after_input_sections_ = true; } | |
3415 | ||
27bc2bce ILT |
3416 | // Return whether this section requires postprocessing after all |
3417 | // relocations have been applied. | |
3418 | bool | |
3419 | requires_postprocessing() const | |
3420 | { return this->requires_postprocessing_; } | |
3421 | ||
16164a6b ST |
3422 | bool |
3423 | is_unique_segment() const | |
3424 | { return this->is_unique_segment_; } | |
3425 | ||
3426 | void | |
3427 | set_is_unique_segment() | |
3428 | { this->is_unique_segment_ = true; } | |
3429 | ||
3430 | uint64_t extra_segment_flags() const | |
3431 | { return this->extra_segment_flags_; } | |
3432 | ||
3433 | void | |
3434 | set_extra_segment_flags(uint64_t flags) | |
3435 | { this->extra_segment_flags_ = flags; } | |
3436 | ||
3437 | uint64_t segment_alignment() const | |
3438 | { return this->segment_alignment_; } | |
3439 | ||
3440 | void | |
3441 | set_segment_alignment(uint64_t align) | |
3442 | { this->segment_alignment_ = align; } | |
34171bc5 | 3443 | |
96803768 ILT |
3444 | // If a section requires postprocessing, return the buffer to use. |
3445 | unsigned char* | |
3446 | postprocessing_buffer() const | |
3447 | { | |
3448 | gold_assert(this->postprocessing_buffer_ != NULL); | |
3449 | return this->postprocessing_buffer_; | |
3450 | } | |
3451 | ||
3452 | // If a section requires postprocessing, create the buffer to use. | |
27bc2bce | 3453 | void |
96803768 ILT |
3454 | create_postprocessing_buffer(); |
3455 | ||
3456 | // If a section requires postprocessing, this is the size of the | |
3457 | // buffer to which relocations should be applied. | |
3458 | off_t | |
3459 | postprocessing_buffer_size() const | |
3460 | { return this->current_data_size_for_child(); } | |
27bc2bce | 3461 | |
755ab8af ILT |
3462 | // Modify the section name. This is only permitted for an |
3463 | // unallocated section, and only before the size has been finalized. | |
3464 | // Otherwise the name will not get into Layout::namepool_. | |
3465 | void | |
3466 | set_name(const char* newname) | |
3467 | { | |
3468 | gold_assert((this->flags_ & elfcpp::SHF_ALLOC) == 0); | |
3469 | gold_assert(!this->is_data_size_valid()); | |
3470 | this->name_ = newname; | |
3471 | } | |
3472 | ||
730cdc88 ILT |
3473 | // Return whether the offset OFFSET in the input section SHNDX in |
3474 | // object OBJECT is being included in the link. | |
3475 | bool | |
3476 | is_input_address_mapped(const Relobj* object, unsigned int shndx, | |
3477 | off_t offset) const; | |
3478 | ||
3479 | // Return the offset within the output section of OFFSET relative to | |
3480 | // the start of input section SHNDX in object OBJECT. | |
8383303e ILT |
3481 | section_offset_type |
3482 | output_offset(const Relobj* object, unsigned int shndx, | |
3483 | section_offset_type offset) const; | |
730cdc88 | 3484 | |
b8e6aad9 ILT |
3485 | // Return the output virtual address of OFFSET relative to the start |
3486 | // of input section SHNDX in object OBJECT. | |
3487 | uint64_t | |
3488 | output_address(const Relobj* object, unsigned int shndx, | |
3489 | off_t offset) const; | |
3490 | ||
e29e076a ILT |
3491 | // Look for the merged section for input section SHNDX in object |
3492 | // OBJECT. If found, return true, and set *ADDR to the address of | |
3493 | // the start of the merged section. This is not necessary the | |
3494 | // output offset corresponding to input offset 0 in the section, | |
3495 | // since the section may be mapped arbitrarily. | |
3496 | bool | |
3497 | find_starting_output_address(const Relobj* object, unsigned int shndx, | |
3498 | uint64_t* addr) const; | |
a9a60db6 | 3499 | |
a445fddf ILT |
3500 | // Record that this output section was found in the SECTIONS clause |
3501 | // of a linker script. | |
3502 | void | |
3503 | set_found_in_sections_clause() | |
3504 | { this->found_in_sections_clause_ = true; } | |
3505 | ||
3506 | // Return whether this output section was found in the SECTIONS | |
3507 | // clause of a linker script. | |
3508 | bool | |
3509 | found_in_sections_clause() const | |
3510 | { return this->found_in_sections_clause_; } | |
3511 | ||
27bc2bce ILT |
3512 | // Write the section header into *OPHDR. |
3513 | template<int size, bool big_endian> | |
3514 | void | |
3515 | write_header(const Layout*, const Stringpool*, | |
3516 | elfcpp::Shdr_write<size, big_endian>*) const; | |
3517 | ||
a445fddf ILT |
3518 | // The next few calls are for linker script support. |
3519 | ||
ead1e424 ILT |
3520 | // In some cases we need to keep a list of the input sections |
3521 | // associated with this output section. We only need the list if we | |
3522 | // might have to change the offsets of the input section within the | |
3523 | // output section after we add the input section. The ordinary | |
3524 | // input sections will be written out when we process the object | |
3525 | // file, and as such we don't need to track them here. We do need | |
3526 | // to track Output_section_data objects here. We store instances of | |
3527 | // this structure in a std::vector, so it must be a POD. There can | |
3528 | // be many instances of this structure, so we use a union to save | |
3529 | // some space. | |
3530 | class Input_section | |
3531 | { | |
3532 | public: | |
3533 | Input_section() | |
b8e6aad9 ILT |
3534 | : shndx_(0), p2align_(0) |
3535 | { | |
3536 | this->u1_.data_size = 0; | |
3537 | this->u2_.object = NULL; | |
3538 | } | |
ead1e424 | 3539 | |
b8e6aad9 | 3540 | // For an ordinary input section. |
2ea97941 ILT |
3541 | Input_section(Relobj* object, unsigned int shndx, off_t data_size, |
3542 | uint64_t addralign) | |
3543 | : shndx_(shndx), | |
6e9ba2ca ST |
3544 | p2align_(ffsll(static_cast<long long>(addralign))), |
3545 | section_order_index_(0) | |
ead1e424 | 3546 | { |
2ea97941 ILT |
3547 | gold_assert(shndx != OUTPUT_SECTION_CODE |
3548 | && shndx != MERGE_DATA_SECTION_CODE | |
3549 | && shndx != MERGE_STRING_SECTION_CODE | |
3550 | && shndx != RELAXED_INPUT_SECTION_CODE); | |
3551 | this->u1_.data_size = data_size; | |
b8e6aad9 | 3552 | this->u2_.object = object; |
ead1e424 ILT |
3553 | } |
3554 | ||
b8e6aad9 | 3555 | // For a non-merge output section. |
ead1e424 | 3556 | Input_section(Output_section_data* posd) |
6e9ba2ca ST |
3557 | : shndx_(OUTPUT_SECTION_CODE), p2align_(0), |
3558 | section_order_index_(0) | |
b8e6aad9 ILT |
3559 | { |
3560 | this->u1_.data_size = 0; | |
3561 | this->u2_.posd = posd; | |
3562 | } | |
3563 | ||
3564 | // For a merge section. | |
3565 | Input_section(Output_section_data* posd, bool is_string, uint64_t entsize) | |
3566 | : shndx_(is_string | |
3567 | ? MERGE_STRING_SECTION_CODE | |
3568 | : MERGE_DATA_SECTION_CODE), | |
6e9ba2ca ST |
3569 | p2align_(0), |
3570 | section_order_index_(0) | |
b8e6aad9 ILT |
3571 | { |
3572 | this->u1_.entsize = entsize; | |
3573 | this->u2_.posd = posd; | |
3574 | } | |
ead1e424 | 3575 | |
20e6d0d6 | 3576 | // For a relaxed input section. |
ca09d69a | 3577 | Input_section(Output_relaxed_input_section* psection) |
6e9ba2ca ST |
3578 | : shndx_(RELAXED_INPUT_SECTION_CODE), p2align_(0), |
3579 | section_order_index_(0) | |
20e6d0d6 DK |
3580 | { |
3581 | this->u1_.data_size = 0; | |
3582 | this->u2_.poris = psection; | |
3583 | } | |
3584 | ||
6e9ba2ca ST |
3585 | unsigned int |
3586 | section_order_index() const | |
3587 | { | |
3588 | return this->section_order_index_; | |
3589 | } | |
3590 | ||
3591 | void | |
3592 | set_section_order_index(unsigned int number) | |
3593 | { | |
3594 | this->section_order_index_ = number; | |
3595 | } | |
3596 | ||
ead1e424 ILT |
3597 | // The required alignment. |
3598 | uint64_t | |
3599 | addralign() const | |
a3ad94ed | 3600 | { |
6625d24e DK |
3601 | if (this->p2align_ != 0) |
3602 | return static_cast<uint64_t>(1) << (this->p2align_ - 1); | |
3603 | else if (!this->is_input_section()) | |
f34787f8 | 3604 | return this->u2_.posd->addralign(); |
6625d24e DK |
3605 | else |
3606 | return 0; | |
a3ad94ed | 3607 | } |
ead1e424 | 3608 | |
6625d24e DK |
3609 | // Set the required alignment, which must be either 0 or a power of 2. |
3610 | // For input sections that are sub-classes of Output_section_data, a | |
3611 | // alignment of zero means asking the underlying object for alignment. | |
3612 | void | |
3613 | set_addralign(uint64_t addralign) | |
3614 | { | |
3615 | if (addralign == 0) | |
3616 | this->p2align_ = 0; | |
3617 | else | |
3618 | { | |
3619 | gold_assert((addralign & (addralign - 1)) == 0); | |
3620 | this->p2align_ = ffsll(static_cast<long long>(addralign)); | |
3621 | } | |
3622 | } | |
34171bc5 | 3623 | |
cdc29364 CC |
3624 | // Return the current required size, without finalization. |
3625 | off_t | |
3626 | current_data_size() const; | |
3627 | ||
ead1e424 ILT |
3628 | // Return the required size. |
3629 | off_t | |
3630 | data_size() const; | |
3631 | ||
a445fddf ILT |
3632 | // Whether this is an input section. |
3633 | bool | |
3634 | is_input_section() const | |
3635 | { | |
3636 | return (this->shndx_ != OUTPUT_SECTION_CODE | |
3637 | && this->shndx_ != MERGE_DATA_SECTION_CODE | |
20e6d0d6 DK |
3638 | && this->shndx_ != MERGE_STRING_SECTION_CODE |
3639 | && this->shndx_ != RELAXED_INPUT_SECTION_CODE); | |
a445fddf ILT |
3640 | } |
3641 | ||
b8e6aad9 ILT |
3642 | // Return whether this is a merge section which matches the |
3643 | // parameters. | |
3644 | bool | |
87f95776 | 3645 | is_merge_section(bool is_string, uint64_t entsize, |
34171bc5 | 3646 | uint64_t addralign) const |
b8e6aad9 ILT |
3647 | { |
3648 | return (this->shndx_ == (is_string | |
3649 | ? MERGE_STRING_SECTION_CODE | |
3650 | : MERGE_DATA_SECTION_CODE) | |
87f95776 | 3651 | && this->u1_.entsize == entsize |
34171bc5 | 3652 | && this->addralign() == addralign); |
b8e6aad9 ILT |
3653 | } |
3654 | ||
0439c796 DK |
3655 | // Return whether this is a merge section for some input section. |
3656 | bool | |
3657 | is_merge_section() const | |
3658 | { | |
3659 | return (this->shndx_ == MERGE_DATA_SECTION_CODE | |
3660 | || this->shndx_ == MERGE_STRING_SECTION_CODE); | |
3661 | } | |
3662 | ||
20e6d0d6 DK |
3663 | // Return whether this is a relaxed input section. |
3664 | bool | |
3665 | is_relaxed_input_section() const | |
3666 | { return this->shndx_ == RELAXED_INPUT_SECTION_CODE; } | |
3667 | ||
3668 | // Return whether this is a generic Output_section_data. | |
3669 | bool | |
3670 | is_output_section_data() const | |
3671 | { | |
3672 | return this->shndx_ == OUTPUT_SECTION_CODE; | |
3673 | } | |
3674 | ||
a445fddf ILT |
3675 | // Return the object for an input section. |
3676 | Relobj* | |
0439c796 | 3677 | relobj() const; |
a445fddf ILT |
3678 | |
3679 | // Return the input section index for an input section. | |
3680 | unsigned int | |
0439c796 | 3681 | shndx() const; |
a445fddf | 3682 | |
20e6d0d6 DK |
3683 | // For non-input-sections, return the associated Output_section_data |
3684 | // object. | |
3685 | Output_section_data* | |
3686 | output_section_data() const | |
3687 | { | |
3688 | gold_assert(!this->is_input_section()); | |
3689 | return this->u2_.posd; | |
3690 | } | |
34171bc5 | 3691 | |
0439c796 DK |
3692 | // For a merge section, return the Output_merge_base pointer. |
3693 | Output_merge_base* | |
3694 | output_merge_base() const | |
3695 | { | |
3696 | gold_assert(this->is_merge_section()); | |
3697 | return this->u2_.pomb; | |
3698 | } | |
3699 | ||
20e6d0d6 DK |
3700 | // Return the Output_relaxed_input_section object. |
3701 | Output_relaxed_input_section* | |
3702 | relaxed_input_section() const | |
3703 | { | |
3704 | gold_assert(this->is_relaxed_input_section()); | |
3705 | return this->u2_.poris; | |
3706 | } | |
3707 | ||
b8e6aad9 ILT |
3708 | // Set the output section. |
3709 | void | |
3710 | set_output_section(Output_section* os) | |
3711 | { | |
3712 | gold_assert(!this->is_input_section()); | |
34171bc5 AM |
3713 | Output_section_data* posd = |
3714 | this->is_relaxed_input_section() ? this->u2_.poris : this->u2_.posd; | |
20e6d0d6 | 3715 | posd->set_output_section(os); |
b8e6aad9 ILT |
3716 | } |
3717 | ||
ead1e424 | 3718 | // Set the address and file offset. This is called during |
96803768 ILT |
3719 | // Layout::finalize. SECTION_FILE_OFFSET is the file offset of |
3720 | // the enclosing section. | |
ead1e424 | 3721 | void |
96803768 ILT |
3722 | set_address_and_file_offset(uint64_t address, off_t file_offset, |
3723 | off_t section_file_offset); | |
ead1e424 | 3724 | |
a445fddf ILT |
3725 | // Reset the address and file offset. |
3726 | void | |
3727 | reset_address_and_file_offset(); | |
3728 | ||
96803768 ILT |
3729 | // Finalize the data size. |
3730 | void | |
3731 | finalize_data_size(); | |
9a0910c3 | 3732 | |
b8e6aad9 ILT |
3733 | // Add an input section, for SHF_MERGE sections. |
3734 | bool | |
2ea97941 | 3735 | add_input_section(Relobj* object, unsigned int shndx) |
b8e6aad9 ILT |
3736 | { |
3737 | gold_assert(this->shndx_ == MERGE_DATA_SECTION_CODE | |
3738 | || this->shndx_ == MERGE_STRING_SECTION_CODE); | |
2ea97941 | 3739 | return this->u2_.posd->add_input_section(object, shndx); |
b8e6aad9 ILT |
3740 | } |
3741 | ||
3742 | // Given an input OBJECT, an input section index SHNDX within that | |
3743 | // object, and an OFFSET relative to the start of that input | |
730cdc88 | 3744 | // section, return whether or not the output offset is known. If |
1e983657 ILT |
3745 | // this function returns true, it sets *POUTPUT to the offset in |
3746 | // the output section, relative to the start of the input section | |
3747 | // in the output section. *POUTPUT may be different from OFFSET | |
3748 | // for a merged section. | |
b8e6aad9 | 3749 | bool |
8383303e ILT |
3750 | output_offset(const Relobj* object, unsigned int shndx, |
3751 | section_offset_type offset, | |
ca09d69a | 3752 | section_offset_type* poutput) const; |
b8e6aad9 | 3753 | |
a9a60db6 ILT |
3754 | // Return whether this is the merge section for the input section |
3755 | // SHNDX in OBJECT. | |
3756 | bool | |
3757 | is_merge_section_for(const Relobj* object, unsigned int shndx) const; | |
3758 | ||
ead1e424 ILT |
3759 | // Write out the data. This does nothing for an input section. |
3760 | void | |
3761 | write(Output_file*); | |
3762 | ||
96803768 ILT |
3763 | // Write the data to a buffer. This does nothing for an input |
3764 | // section. | |
3765 | void | |
3766 | write_to_buffer(unsigned char*); | |
3767 | ||
7d9e3d98 ILT |
3768 | // Print to a map file. |
3769 | void | |
3770 | print_to_mapfile(Mapfile*) const; | |
3771 | ||
38c5e8b4 ILT |
3772 | // Print statistics about merge sections to stderr. |
3773 | void | |
3774 | print_merge_stats(const char* section_name) | |
3775 | { | |
3776 | if (this->shndx_ == MERGE_DATA_SECTION_CODE | |
3777 | || this->shndx_ == MERGE_STRING_SECTION_CODE) | |
3778 | this->u2_.posd->print_merge_stats(section_name); | |
3779 | } | |
3780 | ||
ead1e424 | 3781 | private: |
b8e6aad9 ILT |
3782 | // Code values which appear in shndx_. If the value is not one of |
3783 | // these codes, it is the input section index in the object file. | |
3784 | enum | |
3785 | { | |
3786 | // An Output_section_data. | |
3787 | OUTPUT_SECTION_CODE = -1U, | |
3788 | // An Output_section_data for an SHF_MERGE section with | |
3789 | // SHF_STRINGS not set. | |
3790 | MERGE_DATA_SECTION_CODE = -2U, | |
3791 | // An Output_section_data for an SHF_MERGE section with | |
3792 | // SHF_STRINGS set. | |
20e6d0d6 DK |
3793 | MERGE_STRING_SECTION_CODE = -3U, |
3794 | // An Output_section_data for a relaxed input section. | |
3795 | RELAXED_INPUT_SECTION_CODE = -4U | |
b8e6aad9 ILT |
3796 | }; |
3797 | ||
b8e6aad9 ILT |
3798 | // For an ordinary input section, this is the section index in the |
3799 | // input file. For an Output_section_data, this is | |
3800 | // OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or | |
3801 | // MERGE_STRING_SECTION_CODE. | |
ead1e424 ILT |
3802 | unsigned int shndx_; |
3803 | // The required alignment, stored as a power of 2. | |
3804 | unsigned int p2align_; | |
ead1e424 ILT |
3805 | union |
3806 | { | |
b8e6aad9 ILT |
3807 | // For an ordinary input section, the section size. |
3808 | off_t data_size; | |
20e6d0d6 DK |
3809 | // For OUTPUT_SECTION_CODE or RELAXED_INPUT_SECTION_CODE, this is not |
3810 | // used. For MERGE_DATA_SECTION_CODE or MERGE_STRING_SECTION_CODE, the | |
b8e6aad9 ILT |
3811 | // entity size. |
3812 | uint64_t entsize; | |
3813 | } u1_; | |
3814 | union | |
3815 | { | |
3816 | // For an ordinary input section, the object which holds the | |
ead1e424 | 3817 | // input section. |
f6ce93d6 | 3818 | Relobj* object; |
b8e6aad9 ILT |
3819 | // For OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or |
3820 | // MERGE_STRING_SECTION_CODE, the data. | |
ead1e424 | 3821 | Output_section_data* posd; |
0439c796 | 3822 | Output_merge_base* pomb; |
20e6d0d6 DK |
3823 | // For RELAXED_INPUT_SECTION_CODE, the data. |
3824 | Output_relaxed_input_section* poris; | |
b8e6aad9 | 3825 | } u2_; |
6e9ba2ca ST |
3826 | // The line number of the pattern it matches in the --section-ordering-file |
3827 | // file. It is 0 if does not match any pattern. | |
3828 | unsigned int section_order_index_; | |
ead1e424 ILT |
3829 | }; |
3830 | ||
6625d24e DK |
3831 | // Store the list of input sections for this Output_section into the |
3832 | // list passed in. This removes the input sections, leaving only | |
3833 | // any Output_section_data elements. This returns the size of those | |
3834 | // Output_section_data elements. ADDRESS is the address of this | |
3835 | // output section. FILL is the fill value to use, in case there are | |
3836 | // any spaces between the remaining Output_section_data elements. | |
3837 | uint64_t | |
3838 | get_input_sections(uint64_t address, const std::string& fill, | |
3839 | std::list<Input_section>*); | |
3840 | ||
3841 | // Add a script input section. A script input section can either be | |
3842 | // a plain input section or a sub-class of Output_section_data. | |
3843 | void | |
3844 | add_script_input_section(const Input_section& input_section); | |
3845 | ||
3846 | // Set the current size of the output section. | |
3847 | void | |
3848 | set_current_data_size(off_t size) | |
3849 | { this->set_current_data_size_for_child(size); } | |
3850 | ||
6625d24e DK |
3851 | // End of linker script support. |
3852 | ||
3853 | // Save states before doing section layout. | |
3854 | // This is used for relaxation. | |
3855 | void | |
3856 | save_states(); | |
3857 | ||
3858 | // Restore states prior to section layout. | |
3859 | void | |
3860 | restore_states(); | |
3861 | ||
3862 | // Discard states. | |
3863 | void | |
3864 | discard_states(); | |
3865 | ||
3866 | // Convert existing input sections to relaxed input sections. | |
3867 | void | |
3868 | convert_input_sections_to_relaxed_sections( | |
3869 | const std::vector<Output_relaxed_input_section*>& sections); | |
3870 | ||
3871 | // Find a relaxed input section to an input section in OBJECT | |
3872 | // with index SHNDX. Return NULL if none is found. | |
3873 | const Output_relaxed_input_section* | |
3874 | find_relaxed_input_section(const Relobj* object, unsigned int shndx) const; | |
34171bc5 | 3875 | |
6625d24e DK |
3876 | // Whether section offsets need adjustment due to relaxation. |
3877 | bool | |
3878 | section_offsets_need_adjustment() const | |
3879 | { return this->section_offsets_need_adjustment_; } | |
3880 | ||
3881 | // Set section_offsets_need_adjustment to be true. | |
3882 | void | |
3883 | set_section_offsets_need_adjustment() | |
3884 | { this->section_offsets_need_adjustment_ = true; } | |
3885 | ||
ec661b9d AM |
3886 | // Set section_offsets_need_adjustment to be false. |
3887 | void | |
3888 | clear_section_offsets_need_adjustment() | |
3889 | { this->section_offsets_need_adjustment_ = false; } | |
3890 | ||
6625d24e DK |
3891 | // Adjust section offsets of input sections in this. This is |
3892 | // requires if relaxation caused some input sections to change sizes. | |
3893 | void | |
3894 | adjust_section_offsets(); | |
3895 | ||
3896 | // Whether this is a NOLOAD section. | |
3897 | bool | |
3898 | is_noload() const | |
3899 | { return this->is_noload_; } | |
3900 | ||
3901 | // Set NOLOAD flag. | |
3902 | void | |
3903 | set_is_noload() | |
3904 | { this->is_noload_ = true; } | |
3905 | ||
3906 | // Print merge statistics to stderr. | |
3907 | void | |
3908 | print_merge_stats(); | |
3909 | ||
cdc29364 CC |
3910 | // Set a fixed layout for the section. Used for incremental update links. |
3911 | void | |
3912 | set_fixed_layout(uint64_t sh_addr, off_t sh_offset, off_t sh_size, | |
3913 | uint64_t sh_addralign); | |
3914 | ||
3915 | // Return TRUE if the section has a fixed layout. | |
3916 | bool | |
3917 | has_fixed_layout() const | |
3918 | { return this->has_fixed_layout_; } | |
3919 | ||
9fbd3822 CC |
3920 | // Set flag to allow patch space for this section. Used for full |
3921 | // incremental links. | |
3922 | void | |
3923 | set_is_patch_space_allowed() | |
3924 | { this->is_patch_space_allowed_ = true; } | |
3925 | ||
8ea8cd50 CC |
3926 | // Set a fill method to use for free space left in the output section |
3927 | // during incremental links. | |
3928 | void | |
3929 | set_free_space_fill(Output_fill* free_space_fill) | |
3930 | { | |
3931 | this->free_space_fill_ = free_space_fill; | |
3932 | this->free_list_.set_min_hole_size(free_space_fill->minimum_hole_size()); | |
3933 | } | |
3934 | ||
cdc29364 CC |
3935 | // Reserve space within the fixed layout for the section. Used for |
3936 | // incremental update links. | |
3937 | void | |
3938 | reserve(uint64_t sh_offset, uint64_t sh_size); | |
3939 | ||
5146f448 CC |
3940 | // Allocate space from the free list for the section. Used for |
3941 | // incremental update links. | |
3942 | off_t | |
3943 | allocate(off_t len, uint64_t addralign); | |
3944 | ||
ec661b9d AM |
3945 | typedef std::vector<Input_section> Input_section_list; |
3946 | ||
3947 | // Allow access to the input sections. | |
3948 | const Input_section_list& | |
3949 | input_sections() const | |
3950 | { return this->input_sections_; } | |
3951 | ||
d8f5a274 AM |
3952 | Input_section_list& |
3953 | input_sections() | |
3954 | { return this->input_sections_; } | |
3955 | ||
6625d24e DK |
3956 | protected: |
3957 | // Return the output section--i.e., the object itself. | |
3958 | Output_section* | |
3959 | do_output_section() | |
3960 | { return this; } | |
3961 | ||
3962 | const Output_section* | |
3963 | do_output_section() const | |
3964 | { return this; } | |
3965 | ||
3966 | // Return the section index in the output file. | |
3967 | unsigned int | |
3968 | do_out_shndx() const | |
3969 | { | |
3970 | gold_assert(this->out_shndx_ != -1U); | |
3971 | return this->out_shndx_; | |
3972 | } | |
3973 | ||
3974 | // Set the output section index. | |
3975 | void | |
3976 | do_set_out_shndx(unsigned int shndx) | |
3977 | { | |
3978 | gold_assert(this->out_shndx_ == -1U || this->out_shndx_ == shndx); | |
3979 | this->out_shndx_ = shndx; | |
3980 | } | |
3981 | ||
cdc29364 CC |
3982 | // Update the data size of the Output_section. For a typical |
3983 | // Output_section, there is nothing to do, but if there are any | |
3984 | // Output_section_data objects we need to do a trial layout | |
3985 | // here. | |
3986 | virtual void | |
3987 | update_data_size(); | |
3988 | ||
6625d24e DK |
3989 | // Set the final data size of the Output_section. For a typical |
3990 | // Output_section, there is nothing to do, but if there are any | |
3991 | // Output_section_data objects we need to set their final addresses | |
3992 | // here. | |
3993 | virtual void | |
3994 | set_final_data_size(); | |
3995 | ||
3996 | // Reset the address and file offset. | |
3997 | void | |
3998 | do_reset_address_and_file_offset(); | |
3999 | ||
4000 | // Return true if address and file offset already have reset values. In | |
4001 | // other words, calling reset_address_and_file_offset will not change them. | |
4002 | bool | |
4003 | do_address_and_file_offset_have_reset_values() const; | |
4004 | ||
4005 | // Write the data to the file. For a typical Output_section, this | |
4006 | // does nothing: the data is written out by calling Object::Relocate | |
4007 | // on each input object. But if there are any Output_section_data | |
4008 | // objects we do need to write them out here. | |
4009 | virtual void | |
4010 | do_write(Output_file*); | |
4011 | ||
4012 | // Return the address alignment--function required by parent class. | |
4013 | uint64_t | |
4014 | do_addralign() const | |
4015 | { return this->addralign_; } | |
4016 | ||
4017 | // Return whether there is a load address. | |
4018 | bool | |
4019 | do_has_load_address() const | |
4020 | { return this->has_load_address_; } | |
4021 | ||
4022 | // Return the load address. | |
4023 | uint64_t | |
4024 | do_load_address() const | |
4025 | { | |
4026 | gold_assert(this->has_load_address_); | |
4027 | return this->load_address_; | |
4028 | } | |
4029 | ||
4030 | // Return whether this is an Output_section. | |
4031 | bool | |
4032 | do_is_section() const | |
4033 | { return true; } | |
4034 | ||
4035 | // Return whether this is a section of the specified type. | |
4036 | bool | |
4037 | do_is_section_type(elfcpp::Elf_Word type) const | |
4038 | { return this->type_ == type; } | |
4039 | ||
4040 | // Return whether the specified section flag is set. | |
4041 | bool | |
4042 | do_is_section_flag_set(elfcpp::Elf_Xword flag) const | |
4043 | { return (this->flags_ & flag) != 0; } | |
4044 | ||
4045 | // Set the TLS offset. Called only for SHT_TLS sections. | |
4046 | void | |
4047 | do_set_tls_offset(uint64_t tls_base); | |
4048 | ||
4049 | // Return the TLS offset, relative to the base of the TLS segment. | |
4050 | // Valid only for SHT_TLS sections. | |
4051 | uint64_t | |
4052 | do_tls_offset() const | |
4053 | { return this->tls_offset_; } | |
4054 | ||
4055 | // This may be implemented by a child class. | |
4056 | virtual void | |
4057 | do_finalize_name(Layout*) | |
4058 | { } | |
4059 | ||
4060 | // Print to the map file. | |
4061 | virtual void | |
4062 | do_print_to_mapfile(Mapfile*) const; | |
4063 | ||
4064 | // Record that this section requires postprocessing after all | |
4065 | // relocations have been applied. This is called by a child class. | |
4066 | void | |
4067 | set_requires_postprocessing() | |
4068 | { | |
4069 | this->requires_postprocessing_ = true; | |
4070 | this->after_input_sections_ = true; | |
4071 | } | |
4072 | ||
4073 | // Write all the data of an Output_section into the postprocessing | |
4074 | // buffer. | |
4075 | void | |
4076 | write_to_postprocessing_buffer(); | |
4077 | ||
131687b4 DK |
4078 | // Whether this always keeps an input section list |
4079 | bool | |
4080 | always_keeps_input_sections() const | |
4081 | { return this->always_keeps_input_sections_; } | |
4082 | ||
4083 | // Always keep an input section list. | |
4084 | void | |
4085 | set_always_keeps_input_sections() | |
4086 | { | |
4087 | gold_assert(this->current_data_size_for_child() == 0); | |
4088 | this->always_keeps_input_sections_ = true; | |
4089 | } | |
4090 | ||
c0a62865 | 4091 | private: |
20e6d0d6 DK |
4092 | // We only save enough information to undo the effects of section layout. |
4093 | class Checkpoint_output_section | |
4094 | { | |
4095 | public: | |
2ea97941 ILT |
4096 | Checkpoint_output_section(uint64_t addralign, elfcpp::Elf_Xword flags, |
4097 | const Input_section_list& input_sections, | |
4098 | off_t first_input_offset, | |
4099 | bool attached_input_sections_are_sorted) | |
4100 | : addralign_(addralign), flags_(flags), | |
4101 | input_sections_(input_sections), | |
20e6d0d6 | 4102 | input_sections_size_(input_sections_.size()), |
2ea97941 ILT |
4103 | input_sections_copy_(), first_input_offset_(first_input_offset), |
4104 | attached_input_sections_are_sorted_(attached_input_sections_are_sorted) | |
20e6d0d6 DK |
4105 | { } |
4106 | ||
4107 | virtual | |
4108 | ~Checkpoint_output_section() | |
4109 | { } | |
4110 | ||
4111 | // Return the address alignment. | |
4112 | uint64_t | |
4113 | addralign() const | |
4114 | { return this->addralign_; } | |
4115 | ||
ec661b9d AM |
4116 | void |
4117 | set_addralign(uint64_t val) | |
4118 | { this->addralign_ = val; } | |
4119 | ||
20e6d0d6 DK |
4120 | // Return the section flags. |
4121 | elfcpp::Elf_Xword | |
4122 | flags() const | |
4123 | { return this->flags_; } | |
4124 | ||
4125 | // Return a reference to the input section list copy. | |
c0a62865 DK |
4126 | Input_section_list* |
4127 | input_sections() | |
4128 | { return &this->input_sections_copy_; } | |
20e6d0d6 DK |
4129 | |
4130 | // Return the size of input_sections at the time when checkpoint is | |
4131 | // taken. | |
4132 | size_t | |
4133 | input_sections_size() const | |
4134 | { return this->input_sections_size_; } | |
4135 | ||
4136 | // Whether input sections are copied. | |
4137 | bool | |
4138 | input_sections_saved() const | |
4139 | { return this->input_sections_copy_.size() == this->input_sections_size_; } | |
4140 | ||
4141 | off_t | |
4142 | first_input_offset() const | |
4143 | { return this->first_input_offset_; } | |
4144 | ||
4145 | bool | |
4146 | attached_input_sections_are_sorted() const | |
4147 | { return this->attached_input_sections_are_sorted_; } | |
4148 | ||
4149 | // Save input sections. | |
4150 | void | |
4151 | save_input_sections() | |
4152 | { | |
4153 | this->input_sections_copy_.reserve(this->input_sections_size_); | |
4154 | this->input_sections_copy_.clear(); | |
4155 | Input_section_list::const_iterator p = this->input_sections_.begin(); | |
4156 | gold_assert(this->input_sections_size_ >= this->input_sections_.size()); | |
4157 | for(size_t i = 0; i < this->input_sections_size_ ; i++, ++p) | |
4158 | this->input_sections_copy_.push_back(*p); | |
4159 | } | |
4160 | ||
4161 | private: | |
4162 | // The section alignment. | |
4163 | uint64_t addralign_; | |
4164 | // The section flags. | |
4165 | elfcpp::Elf_Xword flags_; | |
4166 | // Reference to the input sections to be checkpointed. | |
4167 | const Input_section_list& input_sections_; | |
4168 | // Size of the checkpointed portion of input_sections_; | |
4169 | size_t input_sections_size_; | |
4170 | // Copy of input sections. | |
4171 | Input_section_list input_sections_copy_; | |
4172 | // The offset of the first entry in input_sections_. | |
4173 | off_t first_input_offset_; | |
4174 | // True if the input sections attached to this output section have | |
4175 | // already been sorted. | |
4176 | bool attached_input_sections_are_sorted_; | |
4177 | }; | |
4178 | ||
2fd32231 ILT |
4179 | // This class is used to sort the input sections. |
4180 | class Input_section_sort_entry; | |
4181 | ||
2a0ff005 | 4182 | // This is the sort comparison function for ctors and dtors. |
2fd32231 ILT |
4183 | struct Input_section_sort_compare |
4184 | { | |
4185 | bool | |
4186 | operator()(const Input_section_sort_entry&, | |
4187 | const Input_section_sort_entry&) const; | |
4188 | }; | |
4189 | ||
2a0ff005 DK |
4190 | // This is the sort comparison function for .init_array and .fini_array. |
4191 | struct Input_section_sort_init_fini_compare | |
4192 | { | |
4193 | bool | |
4194 | operator()(const Input_section_sort_entry&, | |
4195 | const Input_section_sort_entry&) const; | |
4196 | }; | |
4197 | ||
6e9ba2ca ST |
4198 | // This is the sort comparison function when a section order is specified |
4199 | // from an input file. | |
4200 | struct Input_section_sort_section_order_index_compare | |
4201 | { | |
4202 | bool | |
4203 | operator()(const Input_section_sort_entry&, | |
4204 | const Input_section_sort_entry&) const; | |
4205 | }; | |
4206 | ||
c6ac678d ST |
4207 | // This is the sort comparison function for .text to sort sections with |
4208 | // prefixes .text.{unlikely,exit,startup,hot} before other sections. | |
6934001a CC |
4209 | struct Input_section_sort_section_prefix_special_ordering_compare |
4210 | { | |
4211 | bool | |
4212 | operator()(const Input_section_sort_entry&, | |
4213 | const Input_section_sort_entry&) const; | |
4214 | }; | |
4215 | ||
4216 | // This is the sort comparison function for sorting sections by name. | |
4217 | struct Input_section_sort_section_name_compare | |
c6ac678d ST |
4218 | { |
4219 | bool | |
4220 | operator()(const Input_section_sort_entry&, | |
4221 | const Input_section_sort_entry&) const; | |
4222 | }; | |
4223 | ||
c51e6221 | 4224 | // Fill data. This is used to fill in data between input sections. |
a445fddf ILT |
4225 | // It is also used for data statements (BYTE, WORD, etc.) in linker |
4226 | // scripts. When we have to keep track of the input sections, we | |
4227 | // can use an Output_data_const, but we don't want to have to keep | |
4228 | // track of input sections just to implement fills. | |
c51e6221 ILT |
4229 | class Fill |
4230 | { | |
4231 | public: | |
2ea97941 ILT |
4232 | Fill(off_t section_offset, off_t length) |
4233 | : section_offset_(section_offset), | |
4234 | length_(convert_to_section_size_type(length)) | |
c51e6221 ILT |
4235 | { } |
4236 | ||
4237 | // Return section offset. | |
4238 | off_t | |
4239 | section_offset() const | |
4240 | { return this->section_offset_; } | |
4241 | ||
4242 | // Return fill length. | |
a445fddf | 4243 | section_size_type |
c51e6221 ILT |
4244 | length() const |
4245 | { return this->length_; } | |
4246 | ||
4247 | private: | |
4248 | // The offset within the output section. | |
4249 | off_t section_offset_; | |
4250 | // The length of the space to fill. | |
a445fddf | 4251 | section_size_type length_; |
c51e6221 ILT |
4252 | }; |
4253 | ||
4254 | typedef std::vector<Fill> Fill_list; | |
4255 | ||
c0a62865 | 4256 | // Map used during relaxation of existing sections. This map |
5ac169d4 DK |
4257 | // a section id an input section list index. We assume that |
4258 | // Input_section_list is a vector. | |
4259 | typedef Unordered_map<Section_id, size_t, Section_id_hash> Relaxation_map; | |
c0a62865 | 4260 | |
b8e6aad9 ILT |
4261 | // Add a new output section by Input_section. |
4262 | void | |
4263 | add_output_section_data(Input_section*); | |
4264 | ||
4265 | // Add an SHF_MERGE input section. Returns true if the section was | |
0439c796 DK |
4266 | // handled. If KEEPS_INPUT_SECTIONS is true, the output merge section |
4267 | // stores information about the merged input sections. | |
b8e6aad9 ILT |
4268 | bool |
4269 | add_merge_input_section(Relobj* object, unsigned int shndx, uint64_t flags, | |
0439c796 DK |
4270 | uint64_t entsize, uint64_t addralign, |
4271 | bool keeps_input_sections); | |
b8e6aad9 ILT |
4272 | |
4273 | // Add an output SHF_MERGE section POSD to this output section. | |
4274 | // IS_STRING indicates whether it is a SHF_STRINGS section, and | |
4275 | // ENTSIZE is the entity size. This returns the entry added to | |
4276 | // input_sections_. | |
4277 | void | |
4278 | add_output_merge_section(Output_section_data* posd, bool is_string, | |
4279 | uint64_t entsize); | |
4280 | ||
c0a62865 DK |
4281 | // Find the merge section into which an input section with index SHNDX in |
4282 | // OBJECT has been added. Return NULL if none found. | |
4283 | Output_section_data* | |
4284 | find_merge_section(const Relobj* object, unsigned int shndx) const; | |
4285 | ||
c0a62865 DK |
4286 | // Build a relaxation map. |
4287 | void | |
4288 | build_relaxation_map( | |
4289 | const Input_section_list& input_sections, | |
4290 | size_t limit, | |
4291 | Relaxation_map* map) const; | |
4292 | ||
4293 | // Convert input sections in an input section list into relaxed sections. | |
4294 | void | |
4295 | convert_input_sections_in_list_to_relaxed_sections( | |
4296 | const std::vector<Output_relaxed_input_section*>& relaxed_sections, | |
4297 | const Relaxation_map& map, | |
4298 | Input_section_list* input_sections); | |
4299 | ||
0439c796 DK |
4300 | // Build the lookup maps for merge and relaxed input sections. |
4301 | void | |
4302 | build_lookup_maps() const; | |
4303 | ||
a2fb1b05 ILT |
4304 | // Most of these fields are only valid after layout. |
4305 | ||
4306 | // The name of the section. This will point into a Stringpool. | |
9a0910c3 | 4307 | const char* name_; |
75f65a3e | 4308 | // The section address is in the parent class. |
a2fb1b05 ILT |
4309 | // The section alignment. |
4310 | uint64_t addralign_; | |
4311 | // The section entry size. | |
4312 | uint64_t entsize_; | |
a445fddf ILT |
4313 | // The load address. This is only used when using a linker script |
4314 | // with a SECTIONS clause. The has_load_address_ field indicates | |
4315 | // whether this field is valid. | |
4316 | uint64_t load_address_; | |
75f65a3e | 4317 | // The file offset is in the parent class. |
16649710 | 4318 | // Set the section link field to the index of this section. |
14b31740 | 4319 | const Output_data* link_section_; |
16649710 | 4320 | // If link_section_ is NULL, this is the link field. |
a2fb1b05 | 4321 | unsigned int link_; |
16649710 | 4322 | // Set the section info field to the index of this section. |
755ab8af | 4323 | const Output_section* info_section_; |
6a74a719 ILT |
4324 | // If info_section_ is NULL, set the info field to the symbol table |
4325 | // index of this symbol. | |
4326 | const Symbol* info_symndx_; | |
4327 | // If info_section_ and info_symndx_ are NULL, this is the section | |
4328 | // info field. | |
a2fb1b05 ILT |
4329 | unsigned int info_; |
4330 | // The section type. | |
27bc2bce | 4331 | const elfcpp::Elf_Word type_; |
a2fb1b05 | 4332 | // The section flags. |
a445fddf | 4333 | elfcpp::Elf_Xword flags_; |
22f0da72 ILT |
4334 | // The order of this section in the output segment. |
4335 | Output_section_order order_; | |
61ba1cf9 | 4336 | // The section index. |
ead1e424 | 4337 | unsigned int out_shndx_; |
c06b7b0b ILT |
4338 | // If there is a STT_SECTION for this output section in the normal |
4339 | // symbol table, this is the symbol index. This starts out as zero. | |
4340 | // It is initialized in Layout::finalize() to be the index, or -1U | |
4341 | // if there isn't one. | |
4342 | unsigned int symtab_index_; | |
4343 | // If there is a STT_SECTION for this output section in the dynamic | |
4344 | // symbol table, this is the symbol index. This starts out as zero. | |
4345 | // It is initialized in Layout::finalize() to be the index, or -1U | |
4346 | // if there isn't one. | |
4347 | unsigned int dynsym_index_; | |
ead1e424 ILT |
4348 | // The input sections. This will be empty in cases where we don't |
4349 | // need to keep track of them. | |
4350 | Input_section_list input_sections_; | |
4351 | // The offset of the first entry in input_sections_. | |
4352 | off_t first_input_offset_; | |
c51e6221 ILT |
4353 | // The fill data. This is separate from input_sections_ because we |
4354 | // often will need fill sections without needing to keep track of | |
4355 | // input sections. | |
4356 | Fill_list fills_; | |
96803768 ILT |
4357 | // If the section requires postprocessing, this buffer holds the |
4358 | // section contents during relocation. | |
4359 | unsigned char* postprocessing_buffer_; | |
c06b7b0b ILT |
4360 | // Whether this output section needs a STT_SECTION symbol in the |
4361 | // normal symbol table. This will be true if there is a relocation | |
4362 | // which needs it. | |
4363 | bool needs_symtab_index_ : 1; | |
4364 | // Whether this output section needs a STT_SECTION symbol in the | |
4365 | // dynamic symbol table. This will be true if there is a dynamic | |
4366 | // relocation which needs it. | |
4367 | bool needs_dynsym_index_ : 1; | |
16649710 ILT |
4368 | // Whether the link field of this output section should point to the |
4369 | // normal symbol table. | |
4370 | bool should_link_to_symtab_ : 1; | |
4371 | // Whether the link field of this output section should point to the | |
4372 | // dynamic symbol table. | |
4373 | bool should_link_to_dynsym_ : 1; | |
730cdc88 ILT |
4374 | // Whether this section should be written after all the input |
4375 | // sections are complete. | |
4376 | bool after_input_sections_ : 1; | |
27bc2bce ILT |
4377 | // Whether this section requires post processing after all |
4378 | // relocations have been applied. | |
4379 | bool requires_postprocessing_ : 1; | |
a445fddf ILT |
4380 | // Whether an input section was mapped to this output section |
4381 | // because of a SECTIONS clause in a linker script. | |
4382 | bool found_in_sections_clause_ : 1; | |
4383 | // Whether this section has an explicitly specified load address. | |
4384 | bool has_load_address_ : 1; | |
755ab8af ILT |
4385 | // True if the info_section_ field means the section index of the |
4386 | // section, false if it means the symbol index of the corresponding | |
4387 | // section symbol. | |
4388 | bool info_uses_section_index_ : 1; | |
6e9ba2ca ST |
4389 | // True if input sections attached to this output section have to be |
4390 | // sorted according to a specified order. | |
4391 | bool input_section_order_specified_ : 1; | |
2fd32231 ILT |
4392 | // True if the input sections attached to this output section may |
4393 | // need sorting. | |
4394 | bool may_sort_attached_input_sections_ : 1; | |
4395 | // True if the input sections attached to this output section must | |
4396 | // be sorted. | |
4397 | bool must_sort_attached_input_sections_ : 1; | |
4398 | // True if the input sections attached to this output section have | |
4399 | // already been sorted. | |
4400 | bool attached_input_sections_are_sorted_ : 1; | |
9f1d377b ILT |
4401 | // True if this section holds relro data. |
4402 | bool is_relro_ : 1; | |
8a5e3e08 ILT |
4403 | // True if this is a small section. |
4404 | bool is_small_section_ : 1; | |
4405 | // True if this is a large section. | |
4406 | bool is_large_section_ : 1; | |
f5c870d2 ILT |
4407 | // Whether code-fills are generated at write. |
4408 | bool generate_code_fills_at_write_ : 1; | |
e8cd95c7 ILT |
4409 | // Whether the entry size field should be zero. |
4410 | bool is_entsize_zero_ : 1; | |
8923b24c DK |
4411 | // Whether section offsets need adjustment due to relaxation. |
4412 | bool section_offsets_need_adjustment_ : 1; | |
1e5d2fb1 DK |
4413 | // Whether this is a NOLOAD section. |
4414 | bool is_noload_ : 1; | |
131687b4 DK |
4415 | // Whether this always keeps input section. |
4416 | bool always_keeps_input_sections_ : 1; | |
cdc29364 CC |
4417 | // Whether this section has a fixed layout, for incremental update links. |
4418 | bool has_fixed_layout_ : 1; | |
9fbd3822 CC |
4419 | // True if we can add patch space to this section. |
4420 | bool is_patch_space_allowed_ : 1; | |
16164a6b ST |
4421 | // True if this output section goes into a unique segment. |
4422 | bool is_unique_segment_ : 1; | |
7bf1f802 ILT |
4423 | // For SHT_TLS sections, the offset of this section relative to the base |
4424 | // of the TLS segment. | |
4425 | uint64_t tls_offset_; | |
16164a6b ST |
4426 | // Additional segment flags, specified via linker plugin, when mapping some |
4427 | // input sections to unique segments. | |
34171bc5 | 4428 | uint64_t extra_segment_flags_; |
16164a6b ST |
4429 | // Segment alignment specified via linker plugin, when mapping some |
4430 | // input sections to unique segments. | |
4431 | uint64_t segment_alignment_; | |
20e6d0d6 DK |
4432 | // Saved checkpoint. |
4433 | Checkpoint_output_section* checkpoint_; | |
0439c796 DK |
4434 | // Fast lookup maps for merged and relaxed input sections. |
4435 | Output_section_lookup_maps* lookup_maps_; | |
cdc29364 CC |
4436 | // List of available regions within the section, for incremental |
4437 | // update links. | |
4438 | Free_list free_list_; | |
8ea8cd50 CC |
4439 | // Method for filling chunks of free space. |
4440 | Output_fill* free_space_fill_; | |
9fbd3822 CC |
4441 | // Amount added as patch space for incremental linking. |
4442 | off_t patch_space_; | |
a2fb1b05 ILT |
4443 | }; |
4444 | ||
4445 | // An output segment. PT_LOAD segments are built from collections of | |
4446 | // output sections. Other segments typically point within PT_LOAD | |
4447 | // segments, and are built directly as needed. | |
20e6d0d6 DK |
4448 | // |
4449 | // NOTE: We want to use the copy constructor for this class. During | |
4450 | // relaxation, we may try built the segments multiple times. We do | |
4451 | // that by copying the original segment list before lay-out, doing | |
4452 | // a trial lay-out and roll-back to the saved copied if we need to | |
4453 | // to the lay-out again. | |
a2fb1b05 ILT |
4454 | |
4455 | class Output_segment | |
4456 | { | |
4457 | public: | |
4458 | // Create an output segment, specifying the type and flags. | |
4459 | Output_segment(elfcpp::Elf_Word, elfcpp::Elf_Word); | |
4460 | ||
4461 | // Return the virtual address. | |
4462 | uint64_t | |
4463 | vaddr() const | |
4464 | { return this->vaddr_; } | |
4465 | ||
4466 | // Return the physical address. | |
4467 | uint64_t | |
4468 | paddr() const | |
4469 | { return this->paddr_; } | |
4470 | ||
4471 | // Return the segment type. | |
4472 | elfcpp::Elf_Word | |
4473 | type() const | |
4474 | { return this->type_; } | |
4475 | ||
4476 | // Return the segment flags. | |
4477 | elfcpp::Elf_Word | |
4478 | flags() const | |
4479 | { return this->flags_; } | |
4480 | ||
92e059d8 ILT |
4481 | // Return the memory size. |
4482 | uint64_t | |
4483 | memsz() const | |
4484 | { return this->memsz_; } | |
4485 | ||
ead1e424 ILT |
4486 | // Return the file size. |
4487 | off_t | |
4488 | filesz() const | |
4489 | { return this->filesz_; } | |
4490 | ||
516cb3d0 ILT |
4491 | // Return the file offset. |
4492 | off_t | |
4493 | offset() const | |
4494 | { return this->offset_; } | |
4495 | ||
8a5e3e08 ILT |
4496 | // Whether this is a segment created to hold large data sections. |
4497 | bool | |
4498 | is_large_data_segment() const | |
4499 | { return this->is_large_data_segment_; } | |
4500 | ||
4501 | // Record that this is a segment created to hold large data | |
4502 | // sections. | |
4503 | void | |
4504 | set_is_large_data_segment() | |
4505 | { this->is_large_data_segment_ = true; } | |
4506 | ||
16164a6b ST |
4507 | bool |
4508 | is_unique_segment() const | |
4509 | { return this->is_unique_segment_; } | |
4510 | ||
4511 | // Mark segment as unique, happens when linker plugins request that | |
4512 | // certain input sections be mapped to unique segments. | |
4513 | void | |
4514 | set_is_unique_segment() | |
4515 | { this->is_unique_segment_ = true; } | |
4516 | ||
75f65a3e ILT |
4517 | // Return the maximum alignment of the Output_data. |
4518 | uint64_t | |
a445fddf | 4519 | maximum_alignment(); |
75f65a3e | 4520 | |
22f0da72 ILT |
4521 | // Add the Output_section OS to this PT_LOAD segment. SEG_FLAGS is |
4522 | // the segment flags to use. | |
4523 | void | |
4524 | add_output_section_to_load(Layout* layout, Output_section* os, | |
4525 | elfcpp::Elf_Word seg_flags); | |
4526 | ||
4527 | // Add the Output_section OS to this non-PT_LOAD segment. SEG_FLAGS | |
4528 | // is the segment flags to use. | |
a2fb1b05 | 4529 | void |
22f0da72 ILT |
4530 | add_output_section_to_nonload(Output_section* os, |
4531 | elfcpp::Elf_Word seg_flags); | |
75f65a3e | 4532 | |
1650c4ff ILT |
4533 | // Remove an Output_section from this segment. It is an error if it |
4534 | // is not present. | |
4535 | void | |
4536 | remove_output_section(Output_section* os); | |
4537 | ||
a192ba05 ILT |
4538 | // Add an Output_data (which need not be an Output_section) to the |
4539 | // start of this segment. | |
75f65a3e ILT |
4540 | void |
4541 | add_initial_output_data(Output_data*); | |
4542 | ||
756ac4a8 ILT |
4543 | // Return true if this segment has any sections which hold actual |
4544 | // data, rather than being a BSS section. | |
4545 | bool | |
22f0da72 | 4546 | has_any_data_sections() const; |
756ac4a8 | 4547 | |
22f0da72 ILT |
4548 | // Whether this segment has a dynamic relocs. |
4549 | bool | |
4550 | has_dynamic_reloc() const; | |
4f4c5f80 | 4551 | |
7404fe1b AM |
4552 | // Return the first section. |
4553 | Output_section* | |
4554 | first_section() const; | |
4555 | ||
a445fddf ILT |
4556 | // Return the address of the first section. |
4557 | uint64_t | |
7404fe1b AM |
4558 | first_section_load_address() const |
4559 | { | |
4560 | const Output_section* os = this->first_section(); | |
4561 | return os->has_load_address() ? os->load_address() : os->address(); | |
4562 | } | |
a445fddf ILT |
4563 | |
4564 | // Return whether the addresses have been set already. | |
4565 | bool | |
4566 | are_addresses_set() const | |
4567 | { return this->are_addresses_set_; } | |
4568 | ||
4569 | // Set the addresses. | |
4570 | void | |
2ea97941 | 4571 | set_addresses(uint64_t vaddr, uint64_t paddr) |
a445fddf | 4572 | { |
2ea97941 ILT |
4573 | this->vaddr_ = vaddr; |
4574 | this->paddr_ = paddr; | |
a445fddf ILT |
4575 | this->are_addresses_set_ = true; |
4576 | } | |
4577 | ||
a192ba05 ILT |
4578 | // Update the flags for the flags of an output section added to this |
4579 | // segment. | |
4580 | void | |
4581 | update_flags_for_output_section(elfcpp::Elf_Xword flags) | |
4582 | { | |
4583 | // The ELF ABI specifies that a PT_TLS segment should always have | |
4584 | // PF_R as the flags. | |
4585 | if (this->type() != elfcpp::PT_TLS) | |
4586 | this->flags_ |= flags; | |
4587 | } | |
4588 | ||
1c4f3631 ILT |
4589 | // Set the segment flags. This is only used if we have a PHDRS |
4590 | // clause which explicitly specifies the flags. | |
4591 | void | |
2ea97941 ILT |
4592 | set_flags(elfcpp::Elf_Word flags) |
4593 | { this->flags_ = flags; } | |
1c4f3631 | 4594 | |
75f65a3e | 4595 | // Set the address of the segment to ADDR and the offset to *POFF |
a445fddf ILT |
4596 | // and set the addresses and offsets of all contained output |
4597 | // sections accordingly. Set the section indexes of all contained | |
4598 | // output sections starting with *PSHNDX. If RESET is true, first | |
4599 | // reset the addresses of the contained sections. Return the | |
4600 | // address of the immediately following segment. Update *POFF and | |
4601 | // *PSHNDX. This should only be called for a PT_LOAD segment. | |
75f65a3e | 4602 | uint64_t |
eb426534 | 4603 | set_section_addresses(const Target*, Layout*, bool reset, uint64_t addr, |
fd064a5b | 4604 | unsigned int* increase_relro, bool* has_relro, |
fc497986 | 4605 | off_t* poff, unsigned int* pshndx); |
75f65a3e | 4606 | |
0496d5e5 ILT |
4607 | // Set the minimum alignment of this segment. This may be adjusted |
4608 | // upward based on the section alignments. | |
4609 | void | |
a445fddf | 4610 | set_minimum_p_align(uint64_t align) |
f6973bdc ILT |
4611 | { |
4612 | if (align > this->min_p_align_) | |
4613 | this->min_p_align_ = align; | |
4614 | } | |
0496d5e5 | 4615 | |
75f65a3e ILT |
4616 | // Set the offset of this segment based on the section. This should |
4617 | // only be called for a non-PT_LOAD segment. | |
4618 | void | |
1a2dff53 | 4619 | set_offset(unsigned int increase); |
75f65a3e | 4620 | |
7bf1f802 ILT |
4621 | // Set the TLS offsets of the sections contained in the PT_TLS segment. |
4622 | void | |
4623 | set_tls_offsets(); | |
4624 | ||
75f65a3e ILT |
4625 | // Return the number of output sections. |
4626 | unsigned int | |
4627 | output_section_count() const; | |
a2fb1b05 | 4628 | |
1c4f3631 ILT |
4629 | // Return the section attached to the list segment with the lowest |
4630 | // load address. This is used when handling a PHDRS clause in a | |
4631 | // linker script. | |
4632 | Output_section* | |
4633 | section_with_lowest_load_address() const; | |
4634 | ||
61ba1cf9 ILT |
4635 | // Write the segment header into *OPHDR. |
4636 | template<int size, bool big_endian> | |
4637 | void | |
ead1e424 | 4638 | write_header(elfcpp::Phdr_write<size, big_endian>*); |
61ba1cf9 ILT |
4639 | |
4640 | // Write the section headers of associated sections into V. | |
4641 | template<int size, bool big_endian> | |
4642 | unsigned char* | |
16649710 | 4643 | write_section_headers(const Layout*, const Stringpool*, unsigned char* v, |
7d1a9ebb | 4644 | unsigned int* pshndx) const; |
61ba1cf9 | 4645 | |
7d9e3d98 ILT |
4646 | // Print the output sections in the map file. |
4647 | void | |
4648 | print_sections_to_mapfile(Mapfile*) const; | |
4649 | ||
a2fb1b05 | 4650 | private: |
22f0da72 | 4651 | typedef std::vector<Output_data*> Output_data_list; |
a2fb1b05 | 4652 | |
ead1e424 ILT |
4653 | // Find the maximum alignment in an Output_data_list. |
4654 | static uint64_t | |
a445fddf | 4655 | maximum_alignment_list(const Output_data_list*); |
ead1e424 | 4656 | |
9f1d377b ILT |
4657 | // Return whether the first data section is a relro section. |
4658 | bool | |
4659 | is_first_section_relro() const; | |
4660 | ||
75f65a3e ILT |
4661 | // Set the section addresses in an Output_data_list. |
4662 | uint64_t | |
cdc29364 | 4663 | set_section_list_addresses(Layout*, bool reset, Output_data_list*, |
34171bc5 AM |
4664 | uint64_t addr, off_t* poff, unsigned int* pshndx, |
4665 | bool* in_tls); | |
75f65a3e ILT |
4666 | |
4667 | // Return the number of Output_sections in an Output_data_list. | |
4668 | unsigned int | |
4669 | output_section_count_list(const Output_data_list*) const; | |
4670 | ||
22f0da72 ILT |
4671 | // Return whether an Output_data_list has a dynamic reloc. |
4672 | bool | |
4673 | has_dynamic_reloc_list(const Output_data_list*) const; | |
4f4c5f80 | 4674 | |
1c4f3631 ILT |
4675 | // Find the section with the lowest load address in an |
4676 | // Output_data_list. | |
4677 | void | |
4678 | lowest_load_address_in_list(const Output_data_list* pdl, | |
4679 | Output_section** found, | |
4680 | uint64_t* found_lma) const; | |
4681 | ||
5f1ab67a ILT |
4682 | // Find the first and last entries by address. |
4683 | void | |
4684 | find_first_and_last_list(const Output_data_list* pdl, | |
4685 | const Output_data** pfirst, | |
4686 | const Output_data** plast) const; | |
4687 | ||
61ba1cf9 ILT |
4688 | // Write the section headers in the list into V. |
4689 | template<int size, bool big_endian> | |
4690 | unsigned char* | |
16649710 ILT |
4691 | write_section_headers_list(const Layout*, const Stringpool*, |
4692 | const Output_data_list*, unsigned char* v, | |
7d1a9ebb | 4693 | unsigned int* pshdx) const; |
61ba1cf9 | 4694 | |
7d9e3d98 ILT |
4695 | // Print a section list to the mapfile. |
4696 | void | |
4697 | print_section_list_to_mapfile(Mapfile*, const Output_data_list*) const; | |
4698 | ||
20e6d0d6 DK |
4699 | // NOTE: We want to use the copy constructor. Currently, shallow copy |
4700 | // works for us so we do not need to write our own copy constructor. | |
34171bc5 | 4701 | |
22f0da72 ILT |
4702 | // The list of output data attached to this segment. |
4703 | Output_data_list output_lists_[ORDER_MAX]; | |
a2fb1b05 ILT |
4704 | // The segment virtual address. |
4705 | uint64_t vaddr_; | |
4706 | // The segment physical address. | |
4707 | uint64_t paddr_; | |
4708 | // The size of the segment in memory. | |
4709 | uint64_t memsz_; | |
a445fddf ILT |
4710 | // The maximum section alignment. The is_max_align_known_ field |
4711 | // indicates whether this has been finalized. | |
4712 | uint64_t max_align_; | |
4713 | // The required minimum value for the p_align field. This is used | |
4714 | // for PT_LOAD segments. Note that this does not mean that | |
4715 | // addresses should be aligned to this value; it means the p_paddr | |
4716 | // and p_vaddr fields must be congruent modulo this value. For | |
4717 | // non-PT_LOAD segments, the dynamic linker works more efficiently | |
4718 | // if the p_align field has the more conventional value, although it | |
4719 | // can align as needed. | |
4720 | uint64_t min_p_align_; | |
a2fb1b05 ILT |
4721 | // The offset of the segment data within the file. |
4722 | off_t offset_; | |
4723 | // The size of the segment data in the file. | |
4724 | off_t filesz_; | |
4725 | // The segment type; | |
4726 | elfcpp::Elf_Word type_; | |
4727 | // The segment flags. | |
4728 | elfcpp::Elf_Word flags_; | |
a445fddf ILT |
4729 | // Whether we have finalized max_align_. |
4730 | bool is_max_align_known_ : 1; | |
4731 | // Whether vaddr and paddr were set by a linker script. | |
4732 | bool are_addresses_set_ : 1; | |
8a5e3e08 ILT |
4733 | // Whether this segment holds large data sections. |
4734 | bool is_large_data_segment_ : 1; | |
16164a6b ST |
4735 | // Whether this was marked as a unique segment via a linker plugin. |
4736 | bool is_unique_segment_ : 1; | |
a2fb1b05 ILT |
4737 | }; |
4738 | ||
61ba1cf9 | 4739 | // This class represents the output file. |
a2fb1b05 ILT |
4740 | |
4741 | class Output_file | |
4742 | { | |
4743 | public: | |
14144f39 | 4744 | Output_file(const char* name); |
61ba1cf9 | 4745 | |
516cb3d0 ILT |
4746 | // Indicate that this is a temporary file which should not be |
4747 | // output. | |
4748 | void | |
4749 | set_is_temporary() | |
4750 | { this->is_temporary_ = true; } | |
4751 | ||
404c2abb ILT |
4752 | // Try to open an existing file. Returns false if the file doesn't |
4753 | // exist, has a size of 0 or can't be mmaped. This method is | |
aa92d6ed CC |
4754 | // thread-unsafe. If BASE_NAME is not NULL, use the contents of |
4755 | // that file as the base for incremental linking. | |
404c2abb | 4756 | bool |
aa92d6ed | 4757 | open_base_file(const char* base_name, bool writable); |
404c2abb | 4758 | |
61ba1cf9 | 4759 | // Open the output file. FILE_SIZE is the final size of the file. |
404c2abb ILT |
4760 | // If the file already exists, it is deleted/truncated. This method |
4761 | // is thread-unsafe. | |
61ba1cf9 ILT |
4762 | void |
4763 | open(off_t file_size); | |
4764 | ||
404c2abb | 4765 | // Resize the output file. This method is thread-unsafe. |
27bc2bce ILT |
4766 | void |
4767 | resize(off_t file_size); | |
4768 | ||
c420411f | 4769 | // Close the output file (flushing all buffered data) and make sure |
404c2abb | 4770 | // there are no errors. This method is thread-unsafe. |
61ba1cf9 ILT |
4771 | void |
4772 | close(); | |
4773 | ||
c549a694 ILT |
4774 | // Return the size of this file. |
4775 | off_t | |
4776 | filesize() | |
4777 | { return this->file_size_; } | |
4778 | ||
3aec4f9c RÁE |
4779 | // Return the name of this file. |
4780 | const char* | |
4781 | filename() | |
4782 | { return this->name_; } | |
4783 | ||
61ba1cf9 ILT |
4784 | // We currently always use mmap which makes the view handling quite |
4785 | // simple. In the future we may support other approaches. | |
a2fb1b05 ILT |
4786 | |
4787 | // Write data to the output file. | |
4788 | void | |
fe8718a4 | 4789 | write(off_t offset, const void* data, size_t len) |
61ba1cf9 ILT |
4790 | { memcpy(this->base_ + offset, data, len); } |
4791 | ||
4792 | // Get a buffer to use to write to the file, given the offset into | |
4793 | // the file and the size. | |
4794 | unsigned char* | |
fe8718a4 | 4795 | get_output_view(off_t start, size_t size) |
61ba1cf9 | 4796 | { |
8d32f935 | 4797 | gold_assert(start >= 0 |
34171bc5 | 4798 | && start + static_cast<off_t>(size) <= this->file_size_); |
61ba1cf9 ILT |
4799 | return this->base_ + start; |
4800 | } | |
4801 | ||
4802 | // VIEW must have been returned by get_output_view. Write the | |
4803 | // buffer to the file, passing in the offset and the size. | |
4804 | void | |
fe8718a4 | 4805 | write_output_view(off_t, size_t, unsigned char*) |
61ba1cf9 ILT |
4806 | { } |
4807 | ||
730cdc88 ILT |
4808 | // Get a read/write buffer. This is used when we want to write part |
4809 | // of the file, read it in, and write it again. | |
4810 | unsigned char* | |
fe8718a4 | 4811 | get_input_output_view(off_t start, size_t size) |
730cdc88 ILT |
4812 | { return this->get_output_view(start, size); } |
4813 | ||
4814 | // Write a read/write buffer back to the file. | |
4815 | void | |
fe8718a4 | 4816 | write_input_output_view(off_t, size_t, unsigned char*) |
730cdc88 ILT |
4817 | { } |
4818 | ||
4819 | // Get a read buffer. This is used when we just want to read part | |
4820 | // of the file back it in. | |
4821 | const unsigned char* | |
fe8718a4 | 4822 | get_input_view(off_t start, size_t size) |
730cdc88 ILT |
4823 | { return this->get_output_view(start, size); } |
4824 | ||
4825 | // Release a read bfufer. | |
4826 | void | |
fe8718a4 | 4827 | free_input_view(off_t, size_t, const unsigned char*) |
730cdc88 ILT |
4828 | { } |
4829 | ||
61ba1cf9 | 4830 | private: |
404c2abb ILT |
4831 | // Map the file into memory or, if that fails, allocate anonymous |
4832 | // memory. | |
27bc2bce ILT |
4833 | void |
4834 | map(); | |
4835 | ||
26736d8e | 4836 | // Allocate anonymous memory for the file. |
404c2abb | 4837 | bool |
26736d8e ILT |
4838 | map_anonymous(); |
4839 | ||
404c2abb ILT |
4840 | // Map the file into memory. |
4841 | bool | |
aa92d6ed | 4842 | map_no_anonymous(bool); |
404c2abb | 4843 | |
c420411f ILT |
4844 | // Unmap the file from memory (and flush to disk buffers). |
4845 | void | |
4846 | unmap(); | |
4847 | ||
61ba1cf9 ILT |
4848 | // File name. |
4849 | const char* name_; | |
4850 | // File descriptor. | |
4851 | int o_; | |
4852 | // File size. | |
4853 | off_t file_size_; | |
4854 | // Base of file mapped into memory. | |
4855 | unsigned char* base_; | |
c420411f ILT |
4856 | // True iff base_ points to a memory buffer rather than an output file. |
4857 | bool map_is_anonymous_; | |
88597d34 ILT |
4858 | // True if base_ was allocated using new rather than mmap. |
4859 | bool map_is_allocated_; | |
516cb3d0 ILT |
4860 | // True if this is a temporary file which should not be output. |
4861 | bool is_temporary_; | |
a2fb1b05 ILT |
4862 | }; |
4863 | ||
4864 | } // End namespace gold. | |
4865 | ||
4866 | #endif // !defined(GOLD_OUTPUT_H) |