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a2fb1b05 ILT |
1 | // layout.h -- lay out output file sections for gold -*- C++ -*- |
2 | ||
6cb15b7f ILT |
3 | // Copyright 2006, 2007 Free Software Foundation, Inc. |
4 | // Written by Ian Lance Taylor <iant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
a2fb1b05 ILT |
23 | #ifndef GOLD_LAYOUT_H |
24 | #define GOLD_LAYOUT_H | |
25 | ||
26 | #include <list> | |
27 | #include <string> | |
28 | #include <utility> | |
29 | #include <vector> | |
30 | ||
a2fb1b05 ILT |
31 | #include "workqueue.h" |
32 | #include "object.h" | |
14b31740 | 33 | #include "dynobj.h" |
a2fb1b05 ILT |
34 | #include "stringpool.h" |
35 | ||
36 | namespace gold | |
37 | { | |
38 | ||
ead1e424 | 39 | class General_options; |
54dc6425 | 40 | class Input_objects; |
75f65a3e | 41 | class Symbol_table; |
ead1e424 | 42 | class Output_section_data; |
a2fb1b05 | 43 | class Output_section; |
75f65a3e | 44 | class Output_section_headers; |
a2fb1b05 | 45 | class Output_segment; |
54dc6425 | 46 | class Output_data; |
a3ad94ed | 47 | class Output_data_dynamic; |
730cdc88 | 48 | class Eh_frame; |
61ba1cf9 | 49 | class Target; |
a2fb1b05 | 50 | |
92e059d8 ILT |
51 | // This task function handles mapping the input sections to output |
52 | // sections and laying them out in memory. | |
a2fb1b05 | 53 | |
92e059d8 | 54 | class Layout_task_runner : public Task_function_runner |
a2fb1b05 ILT |
55 | { |
56 | public: | |
57 | // OPTIONS is the command line options, INPUT_OBJECTS is the list of | |
92e059d8 ILT |
58 | // input objects, SYMTAB is the symbol table, LAYOUT is the layout |
59 | // object. | |
60 | Layout_task_runner(const General_options& options, | |
61 | const Input_objects* input_objects, | |
62 | Symbol_table* symtab, | |
63 | Layout* layout) | |
75f65a3e | 64 | : options_(options), input_objects_(input_objects), symtab_(symtab), |
92e059d8 | 65 | layout_(layout) |
a2fb1b05 ILT |
66 | { } |
67 | ||
92e059d8 | 68 | // Run the operation. |
a2fb1b05 | 69 | void |
17a1d0a9 | 70 | run(Workqueue*, const Task*); |
a2fb1b05 ILT |
71 | |
72 | private: | |
92e059d8 ILT |
73 | Layout_task_runner(const Layout_task_runner&); |
74 | Layout_task_runner& operator=(const Layout_task_runner&); | |
a2fb1b05 ILT |
75 | |
76 | const General_options& options_; | |
54dc6425 | 77 | const Input_objects* input_objects_; |
75f65a3e | 78 | Symbol_table* symtab_; |
12e14209 | 79 | Layout* layout_; |
a2fb1b05 ILT |
80 | }; |
81 | ||
82 | // This class handles the details of laying out input sections. | |
83 | ||
84 | class Layout | |
85 | { | |
86 | public: | |
54dc6425 ILT |
87 | Layout(const General_options& options); |
88 | ||
ead1e424 ILT |
89 | // Given an input section SHNDX, named NAME, with data in SHDR, from |
90 | // the object file OBJECT, return the output section where this | |
730cdc88 ILT |
91 | // input section should go. RELOC_SHNDX is the index of a |
92 | // relocation section which applies to this section, or 0 if none, | |
93 | // or -1U if more than one. RELOC_TYPE is the type of the | |
94 | // relocation section if there is one. Set *OFFSET to the offset | |
95 | // within the output section. | |
a2fb1b05 ILT |
96 | template<int size, bool big_endian> |
97 | Output_section* | |
730cdc88 ILT |
98 | layout(Sized_relobj<size, big_endian> *object, unsigned int shndx, |
99 | const char* name, const elfcpp::Shdr<size, big_endian>& shdr, | |
100 | unsigned int reloc_shndx, unsigned int reloc_type, off_t* offset); | |
101 | ||
102 | // Like layout, only for exception frame sections. OBJECT is an | |
103 | // object file. SYMBOLS is the contents of the symbol table | |
104 | // section, with size SYMBOLS_SIZE. SYMBOL_NAMES is the contents of | |
105 | // the symbol name section, with size SYMBOL_NAMES_SIZE. SHNDX is a | |
106 | // .eh_frame section in OBJECT. SHDR is the section header. | |
107 | // RELOC_SHNDX is the index of a relocation section which applies to | |
108 | // this section, or 0 if none, or -1U if more than one. RELOC_TYPE | |
109 | // is the type of the relocation section if there is one. This | |
110 | // returns the output section, and sets *OFFSET to the offset. | |
111 | template<int size, bool big_endian> | |
112 | Output_section* | |
113 | layout_eh_frame(Sized_relobj<size, big_endian>* object, | |
114 | const unsigned char* symbols, | |
115 | off_t symbols_size, | |
116 | const unsigned char* symbol_names, | |
117 | off_t symbol_names_size, | |
118 | unsigned int shndx, | |
119 | const elfcpp::Shdr<size, big_endian>& shdr, | |
120 | unsigned int reloc_shndx, unsigned int reloc_type, | |
121 | off_t* offset); | |
a2fb1b05 | 122 | |
35cdfc9a ILT |
123 | // Handle a GNU stack note. This is called once per input object |
124 | // file. SEEN_GNU_STACK is true if the object file has a | |
125 | // .note.GNU-stack section. GNU_STACK_FLAGS is the section flags | |
126 | // from that section if there was one. | |
127 | void | |
128 | layout_gnu_stack(bool seen_gnu_stack, uint64_t gnu_stack_flags); | |
129 | ||
ead1e424 ILT |
130 | // Add an Output_section_data to the layout. This is used for |
131 | // special sections like the GOT section. | |
132 | void | |
133 | add_output_section_data(const char* name, elfcpp::Elf_Word type, | |
134 | elfcpp::Elf_Xword flags, | |
135 | Output_section_data*); | |
136 | ||
a3ad94ed ILT |
137 | // Create dynamic sections if necessary. |
138 | void | |
139 | create_initial_dynamic_sections(const Input_objects*, Symbol_table*); | |
140 | ||
bfd58944 ILT |
141 | // Define __start and __stop symbols for output sections. |
142 | void | |
143 | define_section_symbols(Symbol_table*, const Target*); | |
144 | ||
61ba1cf9 ILT |
145 | // Return the Stringpool used for symbol names. |
146 | const Stringpool* | |
147 | sympool() const | |
148 | { return &this->sympool_; } | |
149 | ||
16649710 ILT |
150 | // Return the Stringpool used for dynamic symbol names and dynamic |
151 | // tags. | |
152 | const Stringpool* | |
153 | dynpool() const | |
154 | { return &this->dynpool_; } | |
155 | ||
a2fb1b05 ILT |
156 | // Return whether a section is a .gnu.linkonce section, given the |
157 | // section name. | |
158 | static inline bool | |
159 | is_linkonce(const char* name) | |
160 | { return strncmp(name, ".gnu.linkonce", sizeof(".gnu.linkonce") - 1) == 0; } | |
161 | ||
162 | // Record the signature of a comdat section, and return whether to | |
163 | // include it in the link. The GROUP parameter is true for a | |
164 | // section group signature, false for a signature derived from a | |
165 | // .gnu.linkonce section. | |
166 | bool | |
167 | add_comdat(const char*, bool group); | |
168 | ||
54dc6425 | 169 | // Finalize the layout after all the input sections have been added. |
75f65a3e | 170 | off_t |
17a1d0a9 ILT |
171 | finalize(const Input_objects*, Symbol_table*, const Task*); |
172 | ||
173 | // Return whether any sections require postprocessing. | |
174 | bool | |
175 | any_postprocessing_sections() const | |
176 | { return this->any_postprocessing_sections_; } | |
54dc6425 | 177 | |
e44fcf3b ILT |
178 | // Return the size of the output file. |
179 | off_t | |
180 | output_file_size() const | |
181 | { return this->output_file_size_; } | |
182 | ||
16649710 ILT |
183 | // Return the TLS segment. This will return NULL if there isn't |
184 | // one. | |
92e059d8 ILT |
185 | Output_segment* |
186 | tls_segment() const | |
187 | { return this->tls_segment_; } | |
188 | ||
16649710 ILT |
189 | // Return the normal symbol table. |
190 | Output_section* | |
191 | symtab_section() const | |
192 | { | |
193 | gold_assert(this->symtab_section_ != NULL); | |
194 | return this->symtab_section_; | |
195 | } | |
196 | ||
197 | // Return the dynamic symbol table. | |
198 | Output_section* | |
199 | dynsym_section() const | |
200 | { | |
201 | gold_assert(this->dynsym_section_ != NULL); | |
202 | return this->dynsym_section_; | |
203 | } | |
204 | ||
205 | // Return the dynamic tags. | |
206 | Output_data_dynamic* | |
207 | dynamic_data() const | |
208 | { return this->dynamic_data_; } | |
209 | ||
730cdc88 ILT |
210 | // Write out the output sections. |
211 | void | |
212 | write_output_sections(Output_file* of) const; | |
213 | ||
61ba1cf9 ILT |
214 | // Write out data not associated with an input file or the symbol |
215 | // table. | |
216 | void | |
9025d29d | 217 | write_data(const Symbol_table*, Output_file*) const; |
61ba1cf9 | 218 | |
730cdc88 ILT |
219 | // Write out output sections which can not be written until all the |
220 | // input sections are complete. | |
221 | void | |
27bc2bce | 222 | write_sections_after_input_sections(Output_file* of); |
730cdc88 | 223 | |
ead1e424 ILT |
224 | // Return an output section named NAME, or NULL if there is none. |
225 | Output_section* | |
226 | find_output_section(const char* name) const; | |
227 | ||
228 | // Return an output segment of type TYPE, with segment flags SET set | |
229 | // and segment flags CLEAR clear. Return NULL if there is none. | |
230 | Output_segment* | |
231 | find_output_segment(elfcpp::PT type, elfcpp::Elf_Word set, | |
232 | elfcpp::Elf_Word clear) const; | |
233 | ||
535890bb ILT |
234 | // Set a flag to indicate that an object file uses the static TLS model. |
235 | void | |
236 | set_has_static_tls() | |
237 | { this->has_static_tls_ = true; } | |
238 | ||
239 | // Return true if any object file uses the static TLS model. | |
240 | bool | |
241 | has_static_tls() const | |
242 | { return this->has_static_tls_; } | |
243 | ||
ad8f37d1 ILT |
244 | // Dump statistical information to stderr. |
245 | void | |
246 | print_stats() const; | |
247 | ||
54dc6425 ILT |
248 | // The list of segments. |
249 | ||
250 | typedef std::vector<Output_segment*> Segment_list; | |
251 | ||
252 | // The list of sections not attached to a segment. | |
253 | ||
a3ad94ed | 254 | typedef std::vector<Output_section*> Section_list; |
54dc6425 ILT |
255 | |
256 | // The list of information to write out which is not attached to | |
257 | // either a section or a segment. | |
a3ad94ed | 258 | typedef std::vector<Output_data*> Data_list; |
54dc6425 | 259 | |
a2fb1b05 ILT |
260 | private: |
261 | Layout(const Layout&); | |
262 | Layout& operator=(const Layout&); | |
263 | ||
264 | // Mapping from .gnu.linkonce section names to output section names. | |
265 | struct Linkonce_mapping | |
266 | { | |
267 | const char* from; | |
268 | int fromlen; | |
269 | const char* to; | |
ead1e424 | 270 | int tolen; |
a2fb1b05 ILT |
271 | }; |
272 | static const Linkonce_mapping linkonce_mapping[]; | |
273 | static const int linkonce_mapping_count; | |
274 | ||
4f211c8b ILT |
275 | // Create a .note section for gold. |
276 | void | |
35cdfc9a ILT |
277 | create_gold_note(); |
278 | ||
279 | // Record whether the stack must be executable. | |
280 | void | |
281 | create_executable_stack_info(const Target*); | |
4f211c8b | 282 | |
75f65a3e ILT |
283 | // Find the first read-only PT_LOAD segment, creating one if |
284 | // necessary. | |
285 | Output_segment* | |
286 | find_first_load_seg(); | |
287 | ||
7bf1f802 ILT |
288 | // Count the local symbols in the regular symbol table and the dynamic |
289 | // symbol table, and build the respective string pools. | |
290 | void | |
17a1d0a9 | 291 | count_local_symbols(const Task*, const Input_objects*); |
7bf1f802 | 292 | |
54dc6425 ILT |
293 | // Create the output sections for the symbol table. |
294 | void | |
cb295612 | 295 | create_symtab_sections(const Input_objects*, Symbol_table*, off_t*); |
54dc6425 | 296 | |
75f65a3e ILT |
297 | // Create the .shstrtab section. |
298 | Output_section* | |
299 | create_shstrtab(); | |
300 | ||
301 | // Create the section header table. | |
27bc2bce | 302 | void |
9025d29d | 303 | create_shdrs(off_t*); |
54dc6425 | 304 | |
dbe717ef ILT |
305 | // Create the dynamic symbol table. |
306 | void | |
7bf1f802 ILT |
307 | create_dynamic_symtab(const Input_objects*, const Target*, |
308 | Symbol_table*, Output_section** pdynstr, | |
14b31740 ILT |
309 | unsigned int* plocal_dynamic_count, |
310 | std::vector<Symbol*>* pdynamic_symbols, | |
311 | Versions* versions); | |
dbe717ef | 312 | |
7bf1f802 ILT |
313 | // Assign offsets to each local portion of the dynamic symbol table. |
314 | void | |
315 | assign_local_dynsym_offsets(const Input_objects*); | |
316 | ||
a3ad94ed | 317 | // Finish the .dynamic section and PT_DYNAMIC segment. |
dbe717ef | 318 | void |
16649710 | 319 | finish_dynamic_section(const Input_objects*, const Symbol_table*); |
dbe717ef ILT |
320 | |
321 | // Create the .interp section and PT_INTERP segment. | |
322 | void | |
323 | create_interp(const Target* target); | |
324 | ||
14b31740 ILT |
325 | // Create the version sections. |
326 | void | |
9025d29d | 327 | create_version_sections(const Versions*, |
46fe1623 | 328 | const Symbol_table*, |
14b31740 ILT |
329 | unsigned int local_symcount, |
330 | const std::vector<Symbol*>& dynamic_symbols, | |
331 | const Output_section* dynstr); | |
332 | ||
333 | template<int size, bool big_endian> | |
334 | void | |
335 | sized_create_version_sections(const Versions* versions, | |
46fe1623 | 336 | const Symbol_table*, |
14b31740 ILT |
337 | unsigned int local_symcount, |
338 | const std::vector<Symbol*>& dynamic_symbols, | |
91da9340 ILT |
339 | const Output_section* dynstr |
340 | ACCEPT_SIZE_ENDIAN); | |
14b31740 | 341 | |
a2fb1b05 ILT |
342 | // Return whether to include this section in the link. |
343 | template<int size, bool big_endian> | |
344 | bool | |
730cdc88 | 345 | include_section(Sized_relobj<size, big_endian>* object, const char* name, |
a2fb1b05 ILT |
346 | const elfcpp::Shdr<size, big_endian>&); |
347 | ||
ead1e424 ILT |
348 | // Return the output section name to use given an input section |
349 | // name. Set *PLEN to the length of the name. *PLEN must be | |
350 | // initialized to the length of NAME. | |
351 | static const char* | |
352 | output_section_name(const char* name, size_t* plen); | |
353 | ||
a2fb1b05 | 354 | // Return the output section name to use for a linkonce section |
ead1e424 | 355 | // name. PLEN is as for output_section_name. |
a2fb1b05 | 356 | static const char* |
ead1e424 ILT |
357 | linkonce_output_name(const char* name, size_t* plen); |
358 | ||
359 | // Return the output section for NAME, TYPE and FLAGS. | |
360 | Output_section* | |
f0641a0b ILT |
361 | get_output_section(const char* name, Stringpool::Key name_key, |
362 | elfcpp::Elf_Word type, elfcpp::Elf_Xword flags); | |
a2fb1b05 ILT |
363 | |
364 | // Create a new Output_section. | |
365 | Output_section* | |
366 | make_output_section(const char* name, elfcpp::Elf_Word type, | |
367 | elfcpp::Elf_Xword flags); | |
368 | ||
dbe717ef ILT |
369 | // Set the final file offsets of all the segments. |
370 | off_t | |
371 | set_segment_offsets(const Target*, Output_segment*, unsigned int* pshndx); | |
372 | ||
86887060 | 373 | // Set the final file offsets of all the sections not associated |
9a0910c3 ILT |
374 | // with a segment. We set section offsets in three passes: the |
375 | // first handles all allocated sections, the second sections that | |
17a1d0a9 ILT |
376 | // require postprocessing, and the last the late-bound STRTAB |
377 | // sections (probably only shstrtab, which is the one we care about | |
378 | // because it holds section names). | |
9a0910c3 ILT |
379 | enum Section_offset_pass |
380 | { | |
381 | BEFORE_INPUT_SECTIONS_PASS, | |
17a1d0a9 ILT |
382 | POSTPROCESSING_SECTIONS_PASS, |
383 | STRTAB_AFTER_POSTPROCESSING_SECTIONS_PASS | |
9a0910c3 | 384 | }; |
dbe717ef | 385 | off_t |
9a0910c3 ILT |
386 | set_section_offsets(off_t, Section_offset_pass pass); |
387 | ||
86887060 ILT |
388 | // Set the final section indexes of all the sections not associated |
389 | // with a segment. Returns the next unused index. | |
390 | unsigned int | |
391 | set_section_indexes(unsigned int pshndx); | |
dbe717ef | 392 | |
a2fb1b05 ILT |
393 | // Return whether SEG1 comes before SEG2 in the output file. |
394 | static bool | |
b3168e9d | 395 | segment_precedes(const Output_segment* seg1, const Output_segment* seg2); |
a2fb1b05 ILT |
396 | |
397 | // Map from section flags to segment flags. | |
398 | static elfcpp::Elf_Word | |
399 | section_flags_to_segment(elfcpp::Elf_Xword flags); | |
400 | ||
401 | // A mapping used for group signatures. | |
402 | typedef Unordered_map<std::string, bool> Signatures; | |
403 | ||
404 | // Mapping from input section name/type/flags to output section. We | |
405 | // use canonicalized strings here. | |
406 | ||
f0641a0b | 407 | typedef std::pair<Stringpool::Key, |
a2fb1b05 ILT |
408 | std::pair<elfcpp::Elf_Word, elfcpp::Elf_Xword> > Key; |
409 | ||
410 | struct Hash_key | |
411 | { | |
412 | size_t | |
413 | operator()(const Key& k) const; | |
414 | }; | |
415 | ||
416 | typedef Unordered_map<Key, Output_section*, Hash_key> Section_name_map; | |
417 | ||
418 | // A comparison class for segments. | |
419 | ||
420 | struct Compare_segments | |
421 | { | |
422 | bool | |
423 | operator()(const Output_segment* seg1, const Output_segment* seg2) | |
424 | { return Layout::segment_precedes(seg1, seg2); } | |
425 | }; | |
426 | ||
a2fb1b05 ILT |
427 | // A reference to the options on the command line. |
428 | const General_options& options_; | |
429 | // The output section names. | |
430 | Stringpool namepool_; | |
75f65a3e ILT |
431 | // The output symbol names. |
432 | Stringpool sympool_; | |
a3ad94ed ILT |
433 | // The dynamic strings, if needed. |
434 | Stringpool dynpool_; | |
a2fb1b05 ILT |
435 | // The list of group sections and linkonce sections which we have seen. |
436 | Signatures signatures_; | |
437 | // The mapping from input section name/type/flags to output sections. | |
438 | Section_name_map section_name_map_; | |
439 | // The list of output segments. | |
440 | Segment_list segment_list_; | |
a3ad94ed ILT |
441 | // The list of output sections. |
442 | Section_list section_list_; | |
a2fb1b05 ILT |
443 | // The list of output sections which are not attached to any output |
444 | // segment. | |
a3ad94ed ILT |
445 | Section_list unattached_section_list_; |
446 | // The list of unattached Output_data objects which require special | |
447 | // handling because they are not Output_sections. | |
61ba1cf9 | 448 | Data_list special_output_list_; |
27bc2bce ILT |
449 | // The section headers. |
450 | Output_section_headers* section_headers_; | |
92e059d8 ILT |
451 | // A pointer to the PT_TLS segment if there is one. |
452 | Output_segment* tls_segment_; | |
a3ad94ed ILT |
453 | // The SHT_SYMTAB output section. |
454 | Output_section* symtab_section_; | |
455 | // The SHT_DYNSYM output section if there is one. | |
456 | Output_section* dynsym_section_; | |
457 | // The SHT_DYNAMIC output section if there is one. | |
458 | Output_section* dynamic_section_; | |
16649710 ILT |
459 | // The dynamic data which goes into dynamic_section_. |
460 | Output_data_dynamic* dynamic_data_; | |
730cdc88 | 461 | // The exception frame output section if there is one. |
3151305a | 462 | Output_section* eh_frame_section_; |
730cdc88 ILT |
463 | // The exception frame data for eh_frame_section_. |
464 | Eh_frame* eh_frame_data_; | |
465 | // The exception frame header output section if there is one. | |
466 | Output_section* eh_frame_hdr_section_; | |
e44fcf3b ILT |
467 | // The size of the output file. |
468 | off_t output_file_size_; | |
35cdfc9a ILT |
469 | // Whether we have seen an object file marked to require an |
470 | // executable stack. | |
471 | bool input_requires_executable_stack_; | |
472 | // Whether we have seen at least one object file with an executable | |
473 | // stack marker. | |
474 | bool input_with_gnu_stack_note_; | |
475 | // Whether we have seen at least one object file without an | |
476 | // executable stack marker. | |
477 | bool input_without_gnu_stack_note_; | |
535890bb ILT |
478 | // Whether we have seen an object file that uses the static TLS model. |
479 | bool has_static_tls_; | |
17a1d0a9 ILT |
480 | // Whether any sections require postprocessing. |
481 | bool any_postprocessing_sections_; | |
61ba1cf9 ILT |
482 | }; |
483 | ||
730cdc88 ILT |
484 | // This task handles writing out data in output sections which is not |
485 | // part of an input section, or which requires special handling. When | |
486 | // this is done, it unblocks both output_sections_blocker and | |
487 | // final_blocker. | |
488 | ||
489 | class Write_sections_task : public Task | |
490 | { | |
491 | public: | |
492 | Write_sections_task(const Layout* layout, Output_file* of, | |
493 | Task_token* output_sections_blocker, | |
494 | Task_token* final_blocker) | |
495 | : layout_(layout), of_(of), | |
496 | output_sections_blocker_(output_sections_blocker), | |
497 | final_blocker_(final_blocker) | |
498 | { } | |
499 | ||
500 | // The standard Task methods. | |
501 | ||
17a1d0a9 ILT |
502 | Task_token* |
503 | is_runnable(); | |
730cdc88 | 504 | |
17a1d0a9 ILT |
505 | void |
506 | locks(Task_locker*); | |
730cdc88 ILT |
507 | |
508 | void | |
509 | run(Workqueue*); | |
510 | ||
c7912668 ILT |
511 | std::string |
512 | get_name() const | |
513 | { return "Write_sections_task"; } | |
514 | ||
730cdc88 ILT |
515 | private: |
516 | class Write_sections_locker; | |
517 | ||
518 | const Layout* layout_; | |
519 | Output_file* of_; | |
520 | Task_token* output_sections_blocker_; | |
521 | Task_token* final_blocker_; | |
522 | }; | |
523 | ||
61ba1cf9 ILT |
524 | // This task handles writing out data which is not part of a section |
525 | // or segment. | |
526 | ||
527 | class Write_data_task : public Task | |
528 | { | |
529 | public: | |
a3ad94ed | 530 | Write_data_task(const Layout* layout, const Symbol_table* symtab, |
9025d29d ILT |
531 | Output_file* of, Task_token* final_blocker) |
532 | : layout_(layout), symtab_(symtab), of_(of), final_blocker_(final_blocker) | |
61ba1cf9 ILT |
533 | { } |
534 | ||
535 | // The standard Task methods. | |
536 | ||
17a1d0a9 ILT |
537 | Task_token* |
538 | is_runnable(); | |
61ba1cf9 | 539 | |
17a1d0a9 ILT |
540 | void |
541 | locks(Task_locker*); | |
61ba1cf9 ILT |
542 | |
543 | void | |
544 | run(Workqueue*); | |
545 | ||
c7912668 ILT |
546 | std::string |
547 | get_name() const | |
548 | { return "Write_data_task"; } | |
549 | ||
61ba1cf9 ILT |
550 | private: |
551 | const Layout* layout_; | |
a3ad94ed | 552 | const Symbol_table* symtab_; |
61ba1cf9 ILT |
553 | Output_file* of_; |
554 | Task_token* final_blocker_; | |
555 | }; | |
556 | ||
557 | // This task handles writing out the global symbols. | |
558 | ||
559 | class Write_symbols_task : public Task | |
560 | { | |
561 | public: | |
9a2d6984 ILT |
562 | Write_symbols_task(const Symbol_table* symtab, |
563 | const Input_objects* input_objects, | |
16649710 ILT |
564 | const Stringpool* sympool, const Stringpool* dynpool, |
565 | Output_file* of, Task_token* final_blocker) | |
9a2d6984 ILT |
566 | : symtab_(symtab), input_objects_(input_objects), sympool_(sympool), |
567 | dynpool_(dynpool), of_(of), final_blocker_(final_blocker) | |
61ba1cf9 ILT |
568 | { } |
569 | ||
570 | // The standard Task methods. | |
571 | ||
17a1d0a9 ILT |
572 | Task_token* |
573 | is_runnable(); | |
61ba1cf9 | 574 | |
17a1d0a9 ILT |
575 | void |
576 | locks(Task_locker*); | |
61ba1cf9 ILT |
577 | |
578 | void | |
579 | run(Workqueue*); | |
580 | ||
c7912668 ILT |
581 | std::string |
582 | get_name() const | |
583 | { return "Write_symbols_task"; } | |
584 | ||
61ba1cf9 ILT |
585 | private: |
586 | const Symbol_table* symtab_; | |
9a2d6984 | 587 | const Input_objects* input_objects_; |
61ba1cf9 | 588 | const Stringpool* sympool_; |
16649710 | 589 | const Stringpool* dynpool_; |
61ba1cf9 ILT |
590 | Output_file* of_; |
591 | Task_token* final_blocker_; | |
592 | }; | |
593 | ||
730cdc88 ILT |
594 | // This task handles writing out data in output sections which can't |
595 | // be written out until all the input sections have been handled. | |
596 | // This is for sections whose contents is based on the contents of | |
597 | // other output sections. | |
598 | ||
599 | class Write_after_input_sections_task : public Task | |
600 | { | |
601 | public: | |
27bc2bce | 602 | Write_after_input_sections_task(Layout* layout, Output_file* of, |
730cdc88 ILT |
603 | Task_token* input_sections_blocker, |
604 | Task_token* final_blocker) | |
605 | : layout_(layout), of_(of), | |
606 | input_sections_blocker_(input_sections_blocker), | |
607 | final_blocker_(final_blocker) | |
608 | { } | |
609 | ||
610 | // The standard Task methods. | |
611 | ||
17a1d0a9 ILT |
612 | Task_token* |
613 | is_runnable(); | |
730cdc88 | 614 | |
17a1d0a9 ILT |
615 | void |
616 | locks(Task_locker*); | |
730cdc88 ILT |
617 | |
618 | void | |
619 | run(Workqueue*); | |
620 | ||
c7912668 ILT |
621 | std::string |
622 | get_name() const | |
623 | { return "Write_after_input_sections_task"; } | |
624 | ||
730cdc88 | 625 | private: |
27bc2bce | 626 | Layout* layout_; |
730cdc88 ILT |
627 | Output_file* of_; |
628 | Task_token* input_sections_blocker_; | |
629 | Task_token* final_blocker_; | |
630 | }; | |
631 | ||
92e059d8 | 632 | // This task function handles closing the file. |
61ba1cf9 | 633 | |
92e059d8 | 634 | class Close_task_runner : public Task_function_runner |
61ba1cf9 ILT |
635 | { |
636 | public: | |
92e059d8 ILT |
637 | Close_task_runner(Output_file* of) |
638 | : of_(of) | |
61ba1cf9 ILT |
639 | { } |
640 | ||
92e059d8 | 641 | // Run the operation. |
61ba1cf9 | 642 | void |
17a1d0a9 | 643 | run(Workqueue*, const Task*); |
61ba1cf9 ILT |
644 | |
645 | private: | |
646 | Output_file* of_; | |
a2fb1b05 ILT |
647 | }; |
648 | ||
ead1e424 ILT |
649 | // A small helper function to align an address. |
650 | ||
651 | inline uint64_t | |
652 | align_address(uint64_t address, uint64_t addralign) | |
653 | { | |
654 | if (addralign != 0) | |
655 | address = (address + addralign - 1) &~ (addralign - 1); | |
656 | return address; | |
657 | } | |
658 | ||
a2fb1b05 ILT |
659 | } // End namespace gold. |
660 | ||
661 | #endif // !defined(GOLD_LAYOUT_H) |