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a2fb1b05 ILT |
1 | // layout.h -- lay out output file sections for gold -*- C++ -*- |
2 | ||
8a4c0b0d | 3 | // Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
6cb15b7f ILT |
4 | // Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
a2fb1b05 ILT |
23 | #ifndef GOLD_LAYOUT_H |
24 | #define GOLD_LAYOUT_H | |
25 | ||
e94cf127 | 26 | #include <cstring> |
a2fb1b05 | 27 | #include <list> |
1ef4d87f | 28 | #include <map> |
a2fb1b05 ILT |
29 | #include <string> |
30 | #include <utility> | |
31 | #include <vector> | |
32 | ||
e5756efb | 33 | #include "script.h" |
a2fb1b05 ILT |
34 | #include "workqueue.h" |
35 | #include "object.h" | |
14b31740 | 36 | #include "dynobj.h" |
a2fb1b05 ILT |
37 | #include "stringpool.h" |
38 | ||
39 | namespace gold | |
40 | { | |
41 | ||
ead1e424 | 42 | class General_options; |
3ce2c28e | 43 | class Incremental_inputs; |
54dc6425 | 44 | class Input_objects; |
7d9e3d98 | 45 | class Mapfile; |
75f65a3e | 46 | class Symbol_table; |
ead1e424 | 47 | class Output_section_data; |
a2fb1b05 | 48 | class Output_section; |
75f65a3e | 49 | class Output_section_headers; |
20e6d0d6 DK |
50 | class Output_segment_headers; |
51 | class Output_file_header; | |
a2fb1b05 | 52 | class Output_segment; |
54dc6425 | 53 | class Output_data; |
a3ad94ed | 54 | class Output_data_dynamic; |
d491d34e | 55 | class Output_symtab_xindex; |
62b01cb5 ILT |
56 | class Output_reduced_debug_abbrev_section; |
57 | class Output_reduced_debug_info_section; | |
730cdc88 | 58 | class Eh_frame; |
61ba1cf9 | 59 | class Target; |
a2fb1b05 | 60 | |
92e059d8 ILT |
61 | // This task function handles mapping the input sections to output |
62 | // sections and laying them out in memory. | |
a2fb1b05 | 63 | |
92e059d8 | 64 | class Layout_task_runner : public Task_function_runner |
a2fb1b05 ILT |
65 | { |
66 | public: | |
67 | // OPTIONS is the command line options, INPUT_OBJECTS is the list of | |
92e059d8 ILT |
68 | // input objects, SYMTAB is the symbol table, LAYOUT is the layout |
69 | // object. | |
70 | Layout_task_runner(const General_options& options, | |
71 | const Input_objects* input_objects, | |
72 | Symbol_table* symtab, | |
8851ecca | 73 | Target* target, |
7d9e3d98 ILT |
74 | Layout* layout, |
75 | Mapfile* mapfile) | |
75f65a3e | 76 | : options_(options), input_objects_(input_objects), symtab_(symtab), |
7d9e3d98 | 77 | target_(target), layout_(layout), mapfile_(mapfile) |
a2fb1b05 ILT |
78 | { } |
79 | ||
92e059d8 | 80 | // Run the operation. |
a2fb1b05 | 81 | void |
17a1d0a9 | 82 | run(Workqueue*, const Task*); |
a2fb1b05 ILT |
83 | |
84 | private: | |
92e059d8 ILT |
85 | Layout_task_runner(const Layout_task_runner&); |
86 | Layout_task_runner& operator=(const Layout_task_runner&); | |
a2fb1b05 ILT |
87 | |
88 | const General_options& options_; | |
54dc6425 | 89 | const Input_objects* input_objects_; |
75f65a3e | 90 | Symbol_table* symtab_; |
8851ecca | 91 | Target* target_; |
12e14209 | 92 | Layout* layout_; |
7d9e3d98 | 93 | Mapfile* mapfile_; |
a2fb1b05 ILT |
94 | }; |
95 | ||
1ef4d87f ILT |
96 | // This class holds information about the comdat group or |
97 | // .gnu.linkonce section that will be kept for a given signature. | |
8a4c0b0d | 98 | |
1ef4d87f | 99 | class Kept_section |
8a4c0b0d | 100 | { |
1ef4d87f ILT |
101 | private: |
102 | // For a comdat group, we build a mapping from the name of each | |
103 | // section in the group to the section index and the size in object. | |
104 | // When we discard a group in some other object file, we use this | |
105 | // map to figure out which kept section the discarded section is | |
106 | // associated with. We then use that mapping when processing relocs | |
107 | // against discarded sections. | |
108 | struct Comdat_section_info | |
109 | { | |
110 | // The section index. | |
111 | unsigned int shndx; | |
112 | // The section size. | |
113 | uint64_t size; | |
114 | ||
115 | Comdat_section_info(unsigned int a_shndx, uint64_t a_size) | |
116 | : shndx(a_shndx), size(a_size) | |
117 | { } | |
118 | }; | |
119 | ||
120 | // Most comdat groups have only one or two sections, so we use a | |
121 | // std::map rather than an Unordered_map to optimize for that case | |
122 | // without paying too heavily for groups with more sections. | |
123 | typedef std::map<std::string, Comdat_section_info> Comdat_group; | |
124 | ||
125 | public: | |
8a4c0b0d | 126 | Kept_section() |
1ef4d87f ILT |
127 | : object_(NULL), shndx_(0), is_comdat_(false), is_group_name_(false) |
128 | { this->u_.linkonce_size = 0; } | |
129 | ||
130 | // We need to support copies for the signature map in the Layout | |
131 | // object, but we should never copy an object after it has been | |
132 | // marked as a comdat section. | |
133 | Kept_section(const Kept_section& k) | |
134 | : object_(k.object_), shndx_(k.shndx_), is_comdat_(false), | |
135 | is_group_name_(k.is_group_name_) | |
136 | { | |
137 | gold_assert(!k.is_comdat_); | |
138 | this->u_.linkonce_size = 0; | |
139 | } | |
140 | ||
141 | ~Kept_section() | |
142 | { | |
143 | if (this->is_comdat_) | |
144 | delete this->u_.group_sections; | |
145 | } | |
146 | ||
147 | // The object where this section lives. | |
148 | Relobj* | |
149 | object() const | |
150 | { return this->object_; } | |
8a4c0b0d | 151 | |
1ef4d87f ILT |
152 | // Set the object. |
153 | void | |
154 | set_object(Relobj* object) | |
155 | { | |
156 | gold_assert(this->object_ == NULL); | |
157 | this->object_ = object; | |
158 | } | |
159 | ||
160 | // The section index. | |
161 | unsigned int | |
162 | shndx() const | |
163 | { return this->shndx_; } | |
164 | ||
165 | // Set the section index. | |
166 | void | |
167 | set_shndx(unsigned int shndx) | |
168 | { | |
169 | gold_assert(this->shndx_ == 0); | |
170 | this->shndx_ = shndx; | |
171 | } | |
172 | ||
173 | // Whether this is a comdat group. | |
174 | bool | |
175 | is_comdat() const | |
176 | { return this->is_comdat_; } | |
177 | ||
178 | // Set that this is a comdat group. | |
179 | void | |
180 | set_is_comdat() | |
181 | { | |
182 | gold_assert(!this->is_comdat_); | |
183 | this->is_comdat_ = true; | |
184 | this->u_.group_sections = new Comdat_group(); | |
185 | } | |
8a4c0b0d | 186 | |
1ef4d87f ILT |
187 | // Whether this is associated with the name of a group or section |
188 | // rather than the symbol name derived from a linkonce section. | |
189 | bool | |
190 | is_group_name() const | |
191 | { return this->is_group_name_; } | |
192 | ||
193 | // Note that this represents a comdat group rather than a single | |
194 | // linkonce section. | |
195 | void | |
196 | set_is_group_name() | |
197 | { this->is_group_name_ = true; } | |
198 | ||
199 | // Add a section to the group list. | |
200 | void | |
201 | add_comdat_section(const std::string& name, unsigned int shndx, | |
202 | uint64_t size) | |
203 | { | |
204 | gold_assert(this->is_comdat_); | |
205 | Comdat_section_info sinfo(shndx, size); | |
206 | this->u_.group_sections->insert(std::make_pair(name, sinfo)); | |
207 | } | |
208 | ||
209 | // Look for a section name in the group list, and return whether it | |
210 | // was found. If found, returns the section index and size. | |
211 | bool | |
212 | find_comdat_section(const std::string& name, unsigned int *pshndx, | |
213 | uint64_t *psize) const | |
214 | { | |
215 | gold_assert(this->is_comdat_); | |
216 | Comdat_group::const_iterator p = this->u_.group_sections->find(name); | |
217 | if (p == this->u_.group_sections->end()) | |
218 | return false; | |
219 | *pshndx = p->second.shndx; | |
220 | *psize = p->second.size; | |
221 | return true; | |
222 | } | |
223 | ||
224 | // If there is only one section in the group list, return true, and | |
225 | // return the section index and size. | |
226 | bool | |
227 | find_single_comdat_section(unsigned int *pshndx, uint64_t *psize) const | |
228 | { | |
229 | gold_assert(this->is_comdat_); | |
230 | if (this->u_.group_sections->size() != 1) | |
231 | return false; | |
232 | Comdat_group::const_iterator p = this->u_.group_sections->begin(); | |
233 | *pshndx = p->second.shndx; | |
234 | *psize = p->second.size; | |
235 | return true; | |
236 | } | |
237 | ||
238 | // Return the size of a linkonce section. | |
239 | uint64_t | |
240 | linkonce_size() const | |
241 | { | |
242 | gold_assert(!this->is_comdat_); | |
243 | return this->u_.linkonce_size; | |
244 | } | |
245 | ||
246 | // Set the size of a linkonce section. | |
247 | void | |
248 | set_linkonce_size(uint64_t size) | |
249 | { | |
250 | gold_assert(!this->is_comdat_); | |
251 | this->u_.linkonce_size = size; | |
252 | } | |
253 | ||
254 | private: | |
255 | // No assignment. | |
256 | Kept_section& operator=(const Kept_section&); | |
257 | ||
258 | // The object containing the comdat group or .gnu.linkonce section. | |
259 | Relobj* object_; | |
260 | // Index of the group section for comdats and the section itself for | |
8a4c0b0d | 261 | // .gnu.linkonce. |
1ef4d87f ILT |
262 | unsigned int shndx_; |
263 | // True if this is for a comdat group rather than a .gnu.linkonce | |
264 | // section. | |
265 | bool is_comdat_; | |
8a4c0b0d ILT |
266 | // The Kept_sections are values of a mapping, that maps names to |
267 | // them. This field is true if this struct is associated with the | |
268 | // name of a comdat or .gnu.linkonce, false if it is associated with | |
269 | // the name of a symbol obtained from the .gnu.linkonce.* name | |
270 | // through some heuristics. | |
1ef4d87f ILT |
271 | bool is_group_name_; |
272 | union | |
273 | { | |
274 | // If the is_comdat_ field is true, this holds a map from names of | |
275 | // the sections in the group to section indexes in object_ and to | |
276 | // section sizes. | |
277 | Comdat_group* group_sections; | |
278 | // If the is_comdat_ field is false, this holds the size of the | |
279 | // single section. | |
280 | uint64_t linkonce_size; | |
281 | } u_; | |
8a4c0b0d ILT |
282 | }; |
283 | ||
a2fb1b05 ILT |
284 | // This class handles the details of laying out input sections. |
285 | ||
286 | class Layout | |
287 | { | |
288 | public: | |
e55bde5e | 289 | Layout(int number_of_input_files, Script_options*); |
54dc6425 | 290 | |
20e6d0d6 DK |
291 | ~Layout() |
292 | { | |
293 | delete this->relaxation_debug_check_; | |
294 | delete this->segment_states_; | |
295 | } | |
296 | ||
ead1e424 ILT |
297 | // Given an input section SHNDX, named NAME, with data in SHDR, from |
298 | // the object file OBJECT, return the output section where this | |
730cdc88 ILT |
299 | // input section should go. RELOC_SHNDX is the index of a |
300 | // relocation section which applies to this section, or 0 if none, | |
301 | // or -1U if more than one. RELOC_TYPE is the type of the | |
302 | // relocation section if there is one. Set *OFFSET to the offset | |
303 | // within the output section. | |
a2fb1b05 ILT |
304 | template<int size, bool big_endian> |
305 | Output_section* | |
730cdc88 ILT |
306 | layout(Sized_relobj<size, big_endian> *object, unsigned int shndx, |
307 | const char* name, const elfcpp::Shdr<size, big_endian>& shdr, | |
308 | unsigned int reloc_shndx, unsigned int reloc_type, off_t* offset); | |
309 | ||
6a74a719 ILT |
310 | // Layout an input reloc section when doing a relocatable link. The |
311 | // section is RELOC_SHNDX in OBJECT, with data in SHDR. | |
312 | // DATA_SECTION is the reloc section to which it refers. RR is the | |
313 | // relocatable information. | |
314 | template<int size, bool big_endian> | |
315 | Output_section* | |
316 | layout_reloc(Sized_relobj<size, big_endian>* object, | |
317 | unsigned int reloc_shndx, | |
318 | const elfcpp::Shdr<size, big_endian>& shdr, | |
319 | Output_section* data_section, | |
320 | Relocatable_relocs* rr); | |
321 | ||
322 | // Layout a group section when doing a relocatable link. | |
323 | template<int size, bool big_endian> | |
324 | void | |
325 | layout_group(Symbol_table* symtab, | |
326 | Sized_relobj<size, big_endian>* object, | |
327 | unsigned int group_shndx, | |
328 | const char* group_section_name, | |
329 | const char* signature, | |
330 | const elfcpp::Shdr<size, big_endian>& shdr, | |
8825ac63 ILT |
331 | elfcpp::Elf_Word flags, |
332 | std::vector<unsigned int>* shndxes); | |
6a74a719 | 333 | |
730cdc88 ILT |
334 | // Like layout, only for exception frame sections. OBJECT is an |
335 | // object file. SYMBOLS is the contents of the symbol table | |
336 | // section, with size SYMBOLS_SIZE. SYMBOL_NAMES is the contents of | |
337 | // the symbol name section, with size SYMBOL_NAMES_SIZE. SHNDX is a | |
338 | // .eh_frame section in OBJECT. SHDR is the section header. | |
339 | // RELOC_SHNDX is the index of a relocation section which applies to | |
340 | // this section, or 0 if none, or -1U if more than one. RELOC_TYPE | |
341 | // is the type of the relocation section if there is one. This | |
342 | // returns the output section, and sets *OFFSET to the offset. | |
343 | template<int size, bool big_endian> | |
344 | Output_section* | |
345 | layout_eh_frame(Sized_relobj<size, big_endian>* object, | |
346 | const unsigned char* symbols, | |
347 | off_t symbols_size, | |
348 | const unsigned char* symbol_names, | |
349 | off_t symbol_names_size, | |
350 | unsigned int shndx, | |
351 | const elfcpp::Shdr<size, big_endian>& shdr, | |
352 | unsigned int reloc_shndx, unsigned int reloc_type, | |
353 | off_t* offset); | |
a2fb1b05 | 354 | |
35cdfc9a ILT |
355 | // Handle a GNU stack note. This is called once per input object |
356 | // file. SEEN_GNU_STACK is true if the object file has a | |
357 | // .note.GNU-stack section. GNU_STACK_FLAGS is the section flags | |
358 | // from that section if there was one. | |
359 | void | |
360 | layout_gnu_stack(bool seen_gnu_stack, uint64_t gnu_stack_flags); | |
361 | ||
ead1e424 | 362 | // Add an Output_section_data to the layout. This is used for |
f5c870d2 ILT |
363 | // special sections like the GOT section. IS_DYNAMIC_LINKER_SECTION |
364 | // is true for sections which are used by the dynamic linker, such | |
365 | // as dynamic reloc sections. | |
9f1d377b | 366 | Output_section* |
ead1e424 ILT |
367 | add_output_section_data(const char* name, elfcpp::Elf_Word type, |
368 | elfcpp::Elf_Xword flags, | |
f5c870d2 | 369 | Output_section_data*, bool is_dynamic_linker_section); |
ead1e424 | 370 | |
a3ad94ed ILT |
371 | // Create dynamic sections if necessary. |
372 | void | |
9b07f471 | 373 | create_initial_dynamic_sections(Symbol_table*); |
a3ad94ed | 374 | |
bfd58944 ILT |
375 | // Define __start and __stop symbols for output sections. |
376 | void | |
9b07f471 | 377 | define_section_symbols(Symbol_table*); |
bfd58944 | 378 | |
9c547ec3 ILT |
379 | // Create automatic note sections. |
380 | void | |
381 | create_notes(); | |
382 | ||
919ed24c ILT |
383 | // Create sections for linker scripts. |
384 | void | |
385 | create_script_sections() | |
386 | { this->script_options_->create_script_sections(this); } | |
387 | ||
e5756efb ILT |
388 | // Define symbols from any linker script. |
389 | void | |
9b07f471 ILT |
390 | define_script_symbols(Symbol_table* symtab) |
391 | { this->script_options_->add_symbols_to_table(symtab); } | |
e5756efb | 392 | |
755ab8af ILT |
393 | // Define symbols for group signatures. |
394 | void | |
395 | define_group_signatures(Symbol_table*); | |
396 | ||
61ba1cf9 ILT |
397 | // Return the Stringpool used for symbol names. |
398 | const Stringpool* | |
399 | sympool() const | |
400 | { return &this->sympool_; } | |
401 | ||
16649710 ILT |
402 | // Return the Stringpool used for dynamic symbol names and dynamic |
403 | // tags. | |
404 | const Stringpool* | |
405 | dynpool() const | |
406 | { return &this->dynpool_; } | |
407 | ||
d491d34e ILT |
408 | // Return the symtab_xindex section used to hold large section |
409 | // indexes for the normal symbol table. | |
410 | Output_symtab_xindex* | |
411 | symtab_xindex() const | |
412 | { return this->symtab_xindex_; } | |
413 | ||
414 | // Return the dynsym_xindex section used to hold large section | |
415 | // indexes for the dynamic symbol table. | |
416 | Output_symtab_xindex* | |
417 | dynsym_xindex() const | |
418 | { return this->dynsym_xindex_; } | |
419 | ||
a2fb1b05 ILT |
420 | // Return whether a section is a .gnu.linkonce section, given the |
421 | // section name. | |
422 | static inline bool | |
423 | is_linkonce(const char* name) | |
424 | { return strncmp(name, ".gnu.linkonce", sizeof(".gnu.linkonce") - 1) == 0; } | |
425 | ||
e94cf127 CC |
426 | // Return true if a section is a debugging section. |
427 | static inline bool | |
428 | is_debug_info_section(const char* name) | |
429 | { | |
430 | // Debugging sections can only be recognized by name. | |
431 | return (strncmp(name, ".debug", sizeof(".debug") - 1) == 0 | |
8a4c0b0d | 432 | || strncmp(name, ".gnu.linkonce.wi.", |
e94cf127 CC |
433 | sizeof(".gnu.linkonce.wi.") - 1) == 0 |
434 | || strncmp(name, ".line", sizeof(".line") - 1) == 0 | |
435 | || strncmp(name, ".stab", sizeof(".stab") - 1) == 0); | |
436 | } | |
437 | ||
8a4c0b0d ILT |
438 | // Check if a comdat group or .gnu.linkonce section with the given |
439 | // NAME is selected for the link. If there is already a section, | |
440 | // *KEPT_SECTION is set to point to the signature and the function | |
1ef4d87f ILT |
441 | // returns false. Otherwise, OBJECT, SHNDX,IS_COMDAT, and |
442 | // IS_GROUP_NAME are recorded for this NAME in the layout object, | |
443 | // *KEPT_SECTION is set to the internal copy and the function return | |
444 | // false. | |
a2fb1b05 | 445 | bool |
1ef4d87f ILT |
446 | find_or_add_kept_section(const std::string& name, Relobj* object, |
447 | unsigned int shndx, bool is_comdat, | |
448 | bool is_group_name, Kept_section** kept_section); | |
a2fb1b05 | 449 | |
54dc6425 | 450 | // Finalize the layout after all the input sections have been added. |
75f65a3e | 451 | off_t |
8851ecca | 452 | finalize(const Input_objects*, Symbol_table*, Target*, const Task*); |
17a1d0a9 ILT |
453 | |
454 | // Return whether any sections require postprocessing. | |
455 | bool | |
456 | any_postprocessing_sections() const | |
457 | { return this->any_postprocessing_sections_; } | |
54dc6425 | 458 | |
e44fcf3b ILT |
459 | // Return the size of the output file. |
460 | off_t | |
461 | output_file_size() const | |
462 | { return this->output_file_size_; } | |
463 | ||
16649710 ILT |
464 | // Return the TLS segment. This will return NULL if there isn't |
465 | // one. | |
92e059d8 ILT |
466 | Output_segment* |
467 | tls_segment() const | |
468 | { return this->tls_segment_; } | |
469 | ||
16649710 ILT |
470 | // Return the normal symbol table. |
471 | Output_section* | |
472 | symtab_section() const | |
473 | { | |
474 | gold_assert(this->symtab_section_ != NULL); | |
475 | return this->symtab_section_; | |
476 | } | |
477 | ||
478 | // Return the dynamic symbol table. | |
479 | Output_section* | |
480 | dynsym_section() const | |
481 | { | |
482 | gold_assert(this->dynsym_section_ != NULL); | |
483 | return this->dynsym_section_; | |
484 | } | |
485 | ||
486 | // Return the dynamic tags. | |
487 | Output_data_dynamic* | |
488 | dynamic_data() const | |
489 | { return this->dynamic_data_; } | |
490 | ||
730cdc88 ILT |
491 | // Write out the output sections. |
492 | void | |
493 | write_output_sections(Output_file* of) const; | |
494 | ||
61ba1cf9 ILT |
495 | // Write out data not associated with an input file or the symbol |
496 | // table. | |
497 | void | |
9025d29d | 498 | write_data(const Symbol_table*, Output_file*) const; |
61ba1cf9 | 499 | |
730cdc88 ILT |
500 | // Write out output sections which can not be written until all the |
501 | // input sections are complete. | |
502 | void | |
27bc2bce | 503 | write_sections_after_input_sections(Output_file* of); |
730cdc88 | 504 | |
ead1e424 ILT |
505 | // Return an output section named NAME, or NULL if there is none. |
506 | Output_section* | |
507 | find_output_section(const char* name) const; | |
508 | ||
509 | // Return an output segment of type TYPE, with segment flags SET set | |
510 | // and segment flags CLEAR clear. Return NULL if there is none. | |
511 | Output_segment* | |
512 | find_output_segment(elfcpp::PT type, elfcpp::Elf_Word set, | |
513 | elfcpp::Elf_Word clear) const; | |
514 | ||
3802b2dd ILT |
515 | // Return the number of segments we expect to produce. |
516 | size_t | |
517 | expected_segment_count() const; | |
518 | ||
535890bb ILT |
519 | // Set a flag to indicate that an object file uses the static TLS model. |
520 | void | |
521 | set_has_static_tls() | |
522 | { this->has_static_tls_ = true; } | |
523 | ||
524 | // Return true if any object file uses the static TLS model. | |
525 | bool | |
526 | has_static_tls() const | |
527 | { return this->has_static_tls_; } | |
528 | ||
e5756efb ILT |
529 | // Return the options which may be set by a linker script. |
530 | Script_options* | |
531 | script_options() | |
532 | { return this->script_options_; } | |
533 | ||
534 | const Script_options* | |
535 | script_options() const | |
536 | { return this->script_options_; } | |
d391083d | 537 | |
3ce2c28e ILT |
538 | // Return the object managing inputs in incremental build. NULL in |
539 | // non-incremental builds. | |
540 | Incremental_inputs* | |
541 | incremental_inputs() | |
542 | { return this->incremental_inputs_; } | |
543 | ||
8ed814a9 ILT |
544 | // Compute and write out the build ID if needed. |
545 | void | |
546 | write_build_id(Output_file*) const; | |
547 | ||
516cb3d0 ILT |
548 | // Rewrite output file in binary format. |
549 | void | |
550 | write_binary(Output_file* in) const; | |
551 | ||
7d9e3d98 ILT |
552 | // Print output sections to the map file. |
553 | void | |
554 | print_to_mapfile(Mapfile*) const; | |
555 | ||
ad8f37d1 ILT |
556 | // Dump statistical information to stderr. |
557 | void | |
558 | print_stats() const; | |
559 | ||
a445fddf | 560 | // A list of segments. |
54dc6425 ILT |
561 | |
562 | typedef std::vector<Output_segment*> Segment_list; | |
563 | ||
a445fddf | 564 | // A list of sections. |
54dc6425 | 565 | |
a3ad94ed | 566 | typedef std::vector<Output_section*> Section_list; |
54dc6425 ILT |
567 | |
568 | // The list of information to write out which is not attached to | |
569 | // either a section or a segment. | |
a3ad94ed | 570 | typedef std::vector<Output_data*> Data_list; |
54dc6425 | 571 | |
a445fddf ILT |
572 | // Store the allocated sections into the section list. This is used |
573 | // by the linker script code. | |
574 | void | |
575 | get_allocated_sections(Section_list*) const; | |
576 | ||
919ed24c ILT |
577 | // Make a section for a linker script to hold data. |
578 | Output_section* | |
579 | make_output_section_for_script(const char* name); | |
580 | ||
a445fddf ILT |
581 | // Make a segment. This is used by the linker script code. |
582 | Output_segment* | |
583 | make_output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags); | |
584 | ||
585 | // Return the number of segments. | |
586 | size_t | |
587 | segment_count() const | |
588 | { return this->segment_list_.size(); } | |
589 | ||
590 | // Map from section flags to segment flags. | |
591 | static elfcpp::Elf_Word | |
592 | section_flags_to_segment(elfcpp::Elf_Xword flags); | |
593 | ||
154e0e9a ILT |
594 | // Attach sections to segments. |
595 | void | |
596 | attach_sections_to_segments(); | |
597 | ||
20e6d0d6 DK |
598 | // For relaxation clean up, we need to know output section data created |
599 | // from a linker script. | |
600 | void | |
601 | new_output_section_data_from_script(Output_section_data* posd) | |
602 | { | |
603 | if (this->record_output_section_data_from_script_) | |
604 | this->script_output_section_data_list_.push_back(posd); | |
605 | } | |
606 | ||
c0a62865 DK |
607 | // Return section list. |
608 | const Section_list& | |
609 | section_list() const | |
610 | { return this->section_list_; } | |
611 | ||
a2fb1b05 ILT |
612 | private: |
613 | Layout(const Layout&); | |
614 | Layout& operator=(const Layout&); | |
615 | ||
dff16297 ILT |
616 | // Mapping from input section names to output section names. |
617 | struct Section_name_mapping | |
a2fb1b05 ILT |
618 | { |
619 | const char* from; | |
620 | int fromlen; | |
621 | const char* to; | |
ead1e424 | 622 | int tolen; |
a2fb1b05 | 623 | }; |
dff16297 ILT |
624 | static const Section_name_mapping section_name_mapping[]; |
625 | static const int section_name_mapping_count; | |
a2fb1b05 | 626 | |
755ab8af ILT |
627 | // During a relocatable link, a list of group sections and |
628 | // signatures. | |
629 | struct Group_signature | |
630 | { | |
631 | // The group section. | |
632 | Output_section* section; | |
633 | // The signature. | |
634 | const char* signature; | |
635 | ||
636 | Group_signature() | |
637 | : section(NULL), signature(NULL) | |
638 | { } | |
639 | ||
640 | Group_signature(Output_section* sectiona, const char* signaturea) | |
641 | : section(sectiona), signature(signaturea) | |
642 | { } | |
643 | }; | |
644 | typedef std::vector<Group_signature> Group_signatures; | |
645 | ||
ef4ab7a8 | 646 | // Create a note section, filling in the header. |
8ed814a9 | 647 | Output_section* |
ef4ab7a8 PP |
648 | create_note(const char* name, int note_type, const char *section_name, |
649 | size_t descsz, bool allocate, size_t* trailing_padding); | |
8ed814a9 | 650 | |
ef4ab7a8 | 651 | // Create a note section for gold version. |
4f211c8b | 652 | void |
35cdfc9a ILT |
653 | create_gold_note(); |
654 | ||
655 | // Record whether the stack must be executable. | |
656 | void | |
9c547ec3 | 657 | create_executable_stack_info(); |
4f211c8b | 658 | |
8ed814a9 ILT |
659 | // Create a build ID note if needed. |
660 | void | |
661 | create_build_id(); | |
662 | ||
1518dc8f ILT |
663 | // Link .stab and .stabstr sections. |
664 | void | |
665 | link_stabs_sections(); | |
666 | ||
3ce2c28e ILT |
667 | // Create .gnu_incremental_inputs and .gnu_incremental_strtab sections needed |
668 | // for the next run of incremental linking to check what has changed. | |
669 | void | |
670 | create_incremental_info_sections(); | |
671 | ||
75f65a3e ILT |
672 | // Find the first read-only PT_LOAD segment, creating one if |
673 | // necessary. | |
674 | Output_segment* | |
675 | find_first_load_seg(); | |
676 | ||
7bf1f802 ILT |
677 | // Count the local symbols in the regular symbol table and the dynamic |
678 | // symbol table, and build the respective string pools. | |
679 | void | |
17a1d0a9 | 680 | count_local_symbols(const Task*, const Input_objects*); |
7bf1f802 | 681 | |
54dc6425 ILT |
682 | // Create the output sections for the symbol table. |
683 | void | |
d491d34e ILT |
684 | create_symtab_sections(const Input_objects*, Symbol_table*, |
685 | unsigned int, off_t*); | |
54dc6425 | 686 | |
75f65a3e ILT |
687 | // Create the .shstrtab section. |
688 | Output_section* | |
689 | create_shstrtab(); | |
690 | ||
691 | // Create the section header table. | |
27bc2bce | 692 | void |
d491d34e | 693 | create_shdrs(const Output_section* shstrtab_section, off_t*); |
54dc6425 | 694 | |
dbe717ef ILT |
695 | // Create the dynamic symbol table. |
696 | void | |
9b07f471 ILT |
697 | create_dynamic_symtab(const Input_objects*, Symbol_table*, |
698 | Output_section** pdynstr, | |
14b31740 ILT |
699 | unsigned int* plocal_dynamic_count, |
700 | std::vector<Symbol*>* pdynamic_symbols, | |
701 | Versions* versions); | |
dbe717ef | 702 | |
7bf1f802 ILT |
703 | // Assign offsets to each local portion of the dynamic symbol table. |
704 | void | |
705 | assign_local_dynsym_offsets(const Input_objects*); | |
706 | ||
a3ad94ed | 707 | // Finish the .dynamic section and PT_DYNAMIC segment. |
dbe717ef | 708 | void |
16649710 | 709 | finish_dynamic_section(const Input_objects*, const Symbol_table*); |
dbe717ef ILT |
710 | |
711 | // Create the .interp section and PT_INTERP segment. | |
712 | void | |
713 | create_interp(const Target* target); | |
714 | ||
14b31740 ILT |
715 | // Create the version sections. |
716 | void | |
9025d29d | 717 | create_version_sections(const Versions*, |
46fe1623 | 718 | const Symbol_table*, |
14b31740 ILT |
719 | unsigned int local_symcount, |
720 | const std::vector<Symbol*>& dynamic_symbols, | |
721 | const Output_section* dynstr); | |
722 | ||
723 | template<int size, bool big_endian> | |
724 | void | |
725 | sized_create_version_sections(const Versions* versions, | |
46fe1623 | 726 | const Symbol_table*, |
14b31740 ILT |
727 | unsigned int local_symcount, |
728 | const std::vector<Symbol*>& dynamic_symbols, | |
7d1a9ebb | 729 | const Output_section* dynstr); |
14b31740 | 730 | |
a2fb1b05 ILT |
731 | // Return whether to include this section in the link. |
732 | template<int size, bool big_endian> | |
733 | bool | |
730cdc88 | 734 | include_section(Sized_relobj<size, big_endian>* object, const char* name, |
a2fb1b05 ILT |
735 | const elfcpp::Shdr<size, big_endian>&); |
736 | ||
ead1e424 ILT |
737 | // Return the output section name to use given an input section |
738 | // name. Set *PLEN to the length of the name. *PLEN must be | |
739 | // initialized to the length of NAME. | |
740 | static const char* | |
741 | output_section_name(const char* name, size_t* plen); | |
742 | ||
d491d34e ILT |
743 | // Return the number of allocated output sections. |
744 | size_t | |
745 | allocated_output_section_count() const; | |
746 | ||
ead1e424 ILT |
747 | // Return the output section for NAME, TYPE and FLAGS. |
748 | Output_section* | |
f0641a0b | 749 | get_output_section(const char* name, Stringpool::Key name_key, |
f5c870d2 ILT |
750 | elfcpp::Elf_Word type, elfcpp::Elf_Xword flags, |
751 | bool is_interp, bool is_dynamic_linker_section); | |
a2fb1b05 | 752 | |
a445fddf ILT |
753 | // Choose the output section for NAME in RELOBJ. |
754 | Output_section* | |
755 | choose_output_section(const Relobj* relobj, const char* name, | |
756 | elfcpp::Elf_Word type, elfcpp::Elf_Xword flags, | |
f5c870d2 ILT |
757 | bool is_input_section, bool is_interp, |
758 | bool is_dynamic_linker_section); | |
a445fddf | 759 | |
a2fb1b05 ILT |
760 | // Create a new Output_section. |
761 | Output_section* | |
762 | make_output_section(const char* name, elfcpp::Elf_Word type, | |
f5c870d2 ILT |
763 | elfcpp::Elf_Xword flags, bool is_interp, |
764 | bool is_dynamic_linker_section); | |
a2fb1b05 | 765 | |
4e2b1697 ILT |
766 | // Attach a section to a segment. |
767 | void | |
154e0e9a | 768 | attach_section_to_segment(Output_section*); |
4e2b1697 | 769 | |
154e0e9a | 770 | // Attach an allocated section to a segment. |
1650c4ff | 771 | void |
154e0e9a | 772 | attach_allocated_section_to_segment(Output_section*); |
1650c4ff | 773 | |
dbe717ef ILT |
774 | // Set the final file offsets of all the segments. |
775 | off_t | |
776 | set_segment_offsets(const Target*, Output_segment*, unsigned int* pshndx); | |
777 | ||
6a74a719 ILT |
778 | // Set the file offsets of the sections when doing a relocatable |
779 | // link. | |
780 | off_t | |
781 | set_relocatable_section_offsets(Output_data*, unsigned int* pshndx); | |
782 | ||
86887060 | 783 | // Set the final file offsets of all the sections not associated |
9a0910c3 ILT |
784 | // with a segment. We set section offsets in three passes: the |
785 | // first handles all allocated sections, the second sections that | |
17a1d0a9 ILT |
786 | // require postprocessing, and the last the late-bound STRTAB |
787 | // sections (probably only shstrtab, which is the one we care about | |
788 | // because it holds section names). | |
9a0910c3 ILT |
789 | enum Section_offset_pass |
790 | { | |
791 | BEFORE_INPUT_SECTIONS_PASS, | |
17a1d0a9 ILT |
792 | POSTPROCESSING_SECTIONS_PASS, |
793 | STRTAB_AFTER_POSTPROCESSING_SECTIONS_PASS | |
9a0910c3 | 794 | }; |
dbe717ef | 795 | off_t |
9a0910c3 ILT |
796 | set_section_offsets(off_t, Section_offset_pass pass); |
797 | ||
86887060 ILT |
798 | // Set the final section indexes of all the sections not associated |
799 | // with a segment. Returns the next unused index. | |
800 | unsigned int | |
801 | set_section_indexes(unsigned int pshndx); | |
dbe717ef | 802 | |
a445fddf ILT |
803 | // Set the section addresses when using a script. |
804 | Output_segment* | |
805 | set_section_addresses_from_script(Symbol_table*); | |
806 | ||
20e6d0d6 DK |
807 | // Find appropriate places or orphan sections in a script. |
808 | void | |
809 | place_orphan_sections_in_script(); | |
810 | ||
a2fb1b05 ILT |
811 | // Return whether SEG1 comes before SEG2 in the output file. |
812 | static bool | |
b3168e9d | 813 | segment_precedes(const Output_segment* seg1, const Output_segment* seg2); |
a2fb1b05 | 814 | |
20e6d0d6 DK |
815 | // Use to save and restore segments during relaxation. |
816 | typedef Unordered_map<const Output_segment*, const Output_segment*> | |
817 | Segment_states; | |
818 | ||
819 | // Save states of current output segments. | |
820 | void | |
821 | save_segments(Segment_states*); | |
822 | ||
823 | // Restore output segment states. | |
824 | void | |
825 | restore_segments(const Segment_states*); | |
826 | ||
827 | // Clean up after relaxation so that it is possible to lay out the | |
828 | // sections and segments again. | |
829 | void | |
830 | clean_up_after_relaxation(); | |
831 | ||
832 | // Doing preparation work for relaxation. This is factored out to make | |
833 | // Layout::finalized a bit smaller and easier to read. | |
834 | void | |
835 | prepare_for_relaxation(); | |
836 | ||
837 | // Main body of the relaxation loop, which lays out the section. | |
838 | off_t | |
839 | relaxation_loop_body(int, Target*, Symbol_table*, Output_segment**, | |
840 | Output_segment*, Output_segment_headers*, | |
841 | Output_file_header*, unsigned int*); | |
842 | ||
8a4c0b0d | 843 | // A mapping used for kept comdats/.gnu.linkonce group signatures. |
e94cf127 | 844 | typedef Unordered_map<std::string, Kept_section> Signatures; |
a2fb1b05 ILT |
845 | |
846 | // Mapping from input section name/type/flags to output section. We | |
847 | // use canonicalized strings here. | |
848 | ||
f0641a0b | 849 | typedef std::pair<Stringpool::Key, |
a2fb1b05 ILT |
850 | std::pair<elfcpp::Elf_Word, elfcpp::Elf_Xword> > Key; |
851 | ||
852 | struct Hash_key | |
853 | { | |
854 | size_t | |
855 | operator()(const Key& k) const; | |
856 | }; | |
857 | ||
858 | typedef Unordered_map<Key, Output_section*, Hash_key> Section_name_map; | |
859 | ||
860 | // A comparison class for segments. | |
861 | ||
862 | struct Compare_segments | |
863 | { | |
864 | bool | |
865 | operator()(const Output_segment* seg1, const Output_segment* seg2) | |
866 | { return Layout::segment_precedes(seg1, seg2); } | |
867 | }; | |
868 | ||
20e6d0d6 DK |
869 | typedef std::vector<Output_section_data*> Output_section_data_list; |
870 | ||
871 | // Debug checker class. | |
872 | class Relaxation_debug_check | |
873 | { | |
874 | public: | |
875 | Relaxation_debug_check() | |
876 | : section_infos_() | |
877 | { } | |
878 | ||
879 | // Check that sections and special data are in reset states. | |
880 | void | |
881 | check_output_data_for_reset_values(const Layout::Section_list&, | |
882 | const Layout::Data_list&); | |
883 | ||
884 | // Record information of a section list. | |
885 | void | |
886 | read_sections(const Layout::Section_list&); | |
887 | ||
888 | // Verify a section list with recorded information. | |
889 | void | |
890 | verify_sections(const Layout::Section_list&); | |
891 | ||
892 | private: | |
893 | // Information we care about a section. | |
894 | struct Section_info | |
895 | { | |
896 | // Output section described by this. | |
897 | Output_section* output_section; | |
898 | // Load address. | |
899 | uint64_t address; | |
900 | // Data size. | |
901 | off_t data_size; | |
902 | // File offset. | |
903 | off_t offset; | |
904 | }; | |
905 | ||
906 | // Section information. | |
907 | std::vector<Section_info> section_infos_; | |
908 | }; | |
909 | ||
e55bde5e ILT |
910 | // The number of input files, for sizing tables. |
911 | int number_of_input_files_; | |
e5756efb ILT |
912 | // Information set by scripts or by command line options. |
913 | Script_options* script_options_; | |
a2fb1b05 ILT |
914 | // The output section names. |
915 | Stringpool namepool_; | |
75f65a3e ILT |
916 | // The output symbol names. |
917 | Stringpool sympool_; | |
a3ad94ed ILT |
918 | // The dynamic strings, if needed. |
919 | Stringpool dynpool_; | |
a2fb1b05 ILT |
920 | // The list of group sections and linkonce sections which we have seen. |
921 | Signatures signatures_; | |
922 | // The mapping from input section name/type/flags to output sections. | |
923 | Section_name_map section_name_map_; | |
924 | // The list of output segments. | |
925 | Segment_list segment_list_; | |
a3ad94ed ILT |
926 | // The list of output sections. |
927 | Section_list section_list_; | |
a2fb1b05 ILT |
928 | // The list of output sections which are not attached to any output |
929 | // segment. | |
a3ad94ed ILT |
930 | Section_list unattached_section_list_; |
931 | // The list of unattached Output_data objects which require special | |
932 | // handling because they are not Output_sections. | |
61ba1cf9 | 933 | Data_list special_output_list_; |
27bc2bce ILT |
934 | // The section headers. |
935 | Output_section_headers* section_headers_; | |
92e059d8 ILT |
936 | // A pointer to the PT_TLS segment if there is one. |
937 | Output_segment* tls_segment_; | |
9f1d377b ILT |
938 | // A pointer to the PT_GNU_RELRO segment if there is one. |
939 | Output_segment* relro_segment_; | |
a3ad94ed ILT |
940 | // The SHT_SYMTAB output section. |
941 | Output_section* symtab_section_; | |
d491d34e ILT |
942 | // The SHT_SYMTAB_SHNDX for the regular symbol table if there is one. |
943 | Output_symtab_xindex* symtab_xindex_; | |
a3ad94ed ILT |
944 | // The SHT_DYNSYM output section if there is one. |
945 | Output_section* dynsym_section_; | |
d491d34e ILT |
946 | // The SHT_SYMTAB_SHNDX for the dynamic symbol table if there is one. |
947 | Output_symtab_xindex* dynsym_xindex_; | |
a3ad94ed ILT |
948 | // The SHT_DYNAMIC output section if there is one. |
949 | Output_section* dynamic_section_; | |
16649710 ILT |
950 | // The dynamic data which goes into dynamic_section_. |
951 | Output_data_dynamic* dynamic_data_; | |
730cdc88 | 952 | // The exception frame output section if there is one. |
3151305a | 953 | Output_section* eh_frame_section_; |
730cdc88 ILT |
954 | // The exception frame data for eh_frame_section_. |
955 | Eh_frame* eh_frame_data_; | |
2c38906f ILT |
956 | // Whether we have added eh_frame_data_ to the .eh_frame section. |
957 | bool added_eh_frame_data_; | |
730cdc88 ILT |
958 | // The exception frame header output section if there is one. |
959 | Output_section* eh_frame_hdr_section_; | |
8ed814a9 ILT |
960 | // The space for the build ID checksum if there is one. |
961 | Output_section_data* build_id_note_; | |
62b01cb5 ILT |
962 | // The output section containing dwarf abbreviations |
963 | Output_reduced_debug_abbrev_section* debug_abbrev_; | |
964 | // The output section containing the dwarf debug info tree | |
965 | Output_reduced_debug_info_section* debug_info_; | |
755ab8af ILT |
966 | // A list of group sections and their signatures. |
967 | Group_signatures group_signatures_; | |
e44fcf3b ILT |
968 | // The size of the output file. |
969 | off_t output_file_size_; | |
e55bde5e ILT |
970 | // Whether we have attached the sections to the segments. |
971 | bool sections_are_attached_; | |
35cdfc9a ILT |
972 | // Whether we have seen an object file marked to require an |
973 | // executable stack. | |
974 | bool input_requires_executable_stack_; | |
975 | // Whether we have seen at least one object file with an executable | |
976 | // stack marker. | |
977 | bool input_with_gnu_stack_note_; | |
978 | // Whether we have seen at least one object file without an | |
979 | // executable stack marker. | |
980 | bool input_without_gnu_stack_note_; | |
535890bb ILT |
981 | // Whether we have seen an object file that uses the static TLS model. |
982 | bool has_static_tls_; | |
17a1d0a9 ILT |
983 | // Whether any sections require postprocessing. |
984 | bool any_postprocessing_sections_; | |
e55bde5e ILT |
985 | // Whether we have resized the signatures_ hash table. |
986 | bool resized_signatures_; | |
1518dc8f ILT |
987 | // Whether we have created a .stab*str output section. |
988 | bool have_stabstr_section_; | |
3ce2c28e ILT |
989 | // In incremental build, holds information check the inputs and build the |
990 | // .gnu_incremental_inputs section. | |
991 | Incremental_inputs* incremental_inputs_; | |
20e6d0d6 DK |
992 | // Whether we record output section data created in script |
993 | bool record_output_section_data_from_script_; | |
994 | // List of output data that needs to be removed at relexation clean up. | |
995 | Output_section_data_list script_output_section_data_list_; | |
996 | // Structure to save segment states before entering the relaxation loop. | |
997 | Segment_states* segment_states_; | |
998 | // A relaxation debug checker. We only create one when in debugging mode. | |
999 | Relaxation_debug_check* relaxation_debug_check_; | |
61ba1cf9 ILT |
1000 | }; |
1001 | ||
730cdc88 ILT |
1002 | // This task handles writing out data in output sections which is not |
1003 | // part of an input section, or which requires special handling. When | |
1004 | // this is done, it unblocks both output_sections_blocker and | |
1005 | // final_blocker. | |
1006 | ||
1007 | class Write_sections_task : public Task | |
1008 | { | |
1009 | public: | |
1010 | Write_sections_task(const Layout* layout, Output_file* of, | |
1011 | Task_token* output_sections_blocker, | |
1012 | Task_token* final_blocker) | |
1013 | : layout_(layout), of_(of), | |
1014 | output_sections_blocker_(output_sections_blocker), | |
1015 | final_blocker_(final_blocker) | |
1016 | { } | |
1017 | ||
1018 | // The standard Task methods. | |
1019 | ||
17a1d0a9 ILT |
1020 | Task_token* |
1021 | is_runnable(); | |
730cdc88 | 1022 | |
17a1d0a9 ILT |
1023 | void |
1024 | locks(Task_locker*); | |
730cdc88 ILT |
1025 | |
1026 | void | |
1027 | run(Workqueue*); | |
1028 | ||
c7912668 ILT |
1029 | std::string |
1030 | get_name() const | |
1031 | { return "Write_sections_task"; } | |
1032 | ||
730cdc88 ILT |
1033 | private: |
1034 | class Write_sections_locker; | |
1035 | ||
1036 | const Layout* layout_; | |
1037 | Output_file* of_; | |
1038 | Task_token* output_sections_blocker_; | |
1039 | Task_token* final_blocker_; | |
1040 | }; | |
1041 | ||
61ba1cf9 ILT |
1042 | // This task handles writing out data which is not part of a section |
1043 | // or segment. | |
1044 | ||
1045 | class Write_data_task : public Task | |
1046 | { | |
1047 | public: | |
a3ad94ed | 1048 | Write_data_task(const Layout* layout, const Symbol_table* symtab, |
9025d29d ILT |
1049 | Output_file* of, Task_token* final_blocker) |
1050 | : layout_(layout), symtab_(symtab), of_(of), final_blocker_(final_blocker) | |
61ba1cf9 ILT |
1051 | { } |
1052 | ||
1053 | // The standard Task methods. | |
1054 | ||
17a1d0a9 ILT |
1055 | Task_token* |
1056 | is_runnable(); | |
61ba1cf9 | 1057 | |
17a1d0a9 ILT |
1058 | void |
1059 | locks(Task_locker*); | |
61ba1cf9 ILT |
1060 | |
1061 | void | |
1062 | run(Workqueue*); | |
1063 | ||
c7912668 ILT |
1064 | std::string |
1065 | get_name() const | |
1066 | { return "Write_data_task"; } | |
1067 | ||
61ba1cf9 ILT |
1068 | private: |
1069 | const Layout* layout_; | |
a3ad94ed | 1070 | const Symbol_table* symtab_; |
61ba1cf9 ILT |
1071 | Output_file* of_; |
1072 | Task_token* final_blocker_; | |
1073 | }; | |
1074 | ||
1075 | // This task handles writing out the global symbols. | |
1076 | ||
1077 | class Write_symbols_task : public Task | |
1078 | { | |
1079 | public: | |
d491d34e | 1080 | Write_symbols_task(const Layout* layout, const Symbol_table* symtab, |
9a2d6984 | 1081 | const Input_objects* input_objects, |
16649710 ILT |
1082 | const Stringpool* sympool, const Stringpool* dynpool, |
1083 | Output_file* of, Task_token* final_blocker) | |
d491d34e ILT |
1084 | : layout_(layout), symtab_(symtab), input_objects_(input_objects), |
1085 | sympool_(sympool), dynpool_(dynpool), of_(of), | |
1086 | final_blocker_(final_blocker) | |
61ba1cf9 ILT |
1087 | { } |
1088 | ||
1089 | // The standard Task methods. | |
1090 | ||
17a1d0a9 ILT |
1091 | Task_token* |
1092 | is_runnable(); | |
61ba1cf9 | 1093 | |
17a1d0a9 ILT |
1094 | void |
1095 | locks(Task_locker*); | |
61ba1cf9 ILT |
1096 | |
1097 | void | |
1098 | run(Workqueue*); | |
1099 | ||
c7912668 ILT |
1100 | std::string |
1101 | get_name() const | |
1102 | { return "Write_symbols_task"; } | |
1103 | ||
61ba1cf9 | 1104 | private: |
d491d34e | 1105 | const Layout* layout_; |
61ba1cf9 | 1106 | const Symbol_table* symtab_; |
9a2d6984 | 1107 | const Input_objects* input_objects_; |
61ba1cf9 | 1108 | const Stringpool* sympool_; |
16649710 | 1109 | const Stringpool* dynpool_; |
61ba1cf9 ILT |
1110 | Output_file* of_; |
1111 | Task_token* final_blocker_; | |
1112 | }; | |
1113 | ||
730cdc88 ILT |
1114 | // This task handles writing out data in output sections which can't |
1115 | // be written out until all the input sections have been handled. | |
1116 | // This is for sections whose contents is based on the contents of | |
1117 | // other output sections. | |
1118 | ||
1119 | class Write_after_input_sections_task : public Task | |
1120 | { | |
1121 | public: | |
27bc2bce | 1122 | Write_after_input_sections_task(Layout* layout, Output_file* of, |
730cdc88 ILT |
1123 | Task_token* input_sections_blocker, |
1124 | Task_token* final_blocker) | |
1125 | : layout_(layout), of_(of), | |
1126 | input_sections_blocker_(input_sections_blocker), | |
1127 | final_blocker_(final_blocker) | |
1128 | { } | |
1129 | ||
1130 | // The standard Task methods. | |
1131 | ||
17a1d0a9 ILT |
1132 | Task_token* |
1133 | is_runnable(); | |
730cdc88 | 1134 | |
17a1d0a9 ILT |
1135 | void |
1136 | locks(Task_locker*); | |
730cdc88 ILT |
1137 | |
1138 | void | |
1139 | run(Workqueue*); | |
1140 | ||
c7912668 ILT |
1141 | std::string |
1142 | get_name() const | |
1143 | { return "Write_after_input_sections_task"; } | |
1144 | ||
730cdc88 | 1145 | private: |
27bc2bce | 1146 | Layout* layout_; |
730cdc88 ILT |
1147 | Output_file* of_; |
1148 | Task_token* input_sections_blocker_; | |
1149 | Task_token* final_blocker_; | |
1150 | }; | |
1151 | ||
92e059d8 | 1152 | // This task function handles closing the file. |
61ba1cf9 | 1153 | |
92e059d8 | 1154 | class Close_task_runner : public Task_function_runner |
61ba1cf9 ILT |
1155 | { |
1156 | public: | |
516cb3d0 ILT |
1157 | Close_task_runner(const General_options* options, const Layout* layout, |
1158 | Output_file* of) | |
1159 | : options_(options), layout_(layout), of_(of) | |
61ba1cf9 ILT |
1160 | { } |
1161 | ||
92e059d8 | 1162 | // Run the operation. |
61ba1cf9 | 1163 | void |
17a1d0a9 | 1164 | run(Workqueue*, const Task*); |
61ba1cf9 ILT |
1165 | |
1166 | private: | |
516cb3d0 ILT |
1167 | const General_options* options_; |
1168 | const Layout* layout_; | |
61ba1cf9 | 1169 | Output_file* of_; |
a2fb1b05 ILT |
1170 | }; |
1171 | ||
ead1e424 ILT |
1172 | // A small helper function to align an address. |
1173 | ||
1174 | inline uint64_t | |
1175 | align_address(uint64_t address, uint64_t addralign) | |
1176 | { | |
1177 | if (addralign != 0) | |
1178 | address = (address + addralign - 1) &~ (addralign - 1); | |
1179 | return address; | |
1180 | } | |
1181 | ||
a2fb1b05 ILT |
1182 | } // End namespace gold. |
1183 | ||
1184 | #endif // !defined(GOLD_LAYOUT_H) |