Commit | Line | Data |
---|---|---|
a2fb1b05 ILT |
1 | // layout.h -- lay out output file sections for gold -*- C++ -*- |
2 | ||
e5756efb | 3 | // Copyright 2006, 2007, 2008 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 | ||
26 | #include <list> | |
27 | #include <string> | |
28 | #include <utility> | |
29 | #include <vector> | |
30 | ||
e5756efb | 31 | #include "script.h" |
a2fb1b05 ILT |
32 | #include "workqueue.h" |
33 | #include "object.h" | |
14b31740 | 34 | #include "dynobj.h" |
a2fb1b05 ILT |
35 | #include "stringpool.h" |
36 | ||
37 | namespace gold | |
38 | { | |
39 | ||
ead1e424 | 40 | class General_options; |
54dc6425 | 41 | class Input_objects; |
75f65a3e | 42 | class Symbol_table; |
ead1e424 | 43 | class Output_section_data; |
a2fb1b05 | 44 | class Output_section; |
75f65a3e | 45 | class Output_section_headers; |
a2fb1b05 | 46 | class Output_segment; |
54dc6425 | 47 | class Output_data; |
a3ad94ed | 48 | class Output_data_dynamic; |
730cdc88 | 49 | class Eh_frame; |
61ba1cf9 | 50 | class Target; |
a2fb1b05 | 51 | |
92e059d8 ILT |
52 | // This task function handles mapping the input sections to output |
53 | // sections and laying them out in memory. | |
a2fb1b05 | 54 | |
92e059d8 | 55 | class Layout_task_runner : public Task_function_runner |
a2fb1b05 ILT |
56 | { |
57 | public: | |
58 | // OPTIONS is the command line options, INPUT_OBJECTS is the list of | |
92e059d8 ILT |
59 | // input objects, SYMTAB is the symbol table, LAYOUT is the layout |
60 | // object. | |
61 | Layout_task_runner(const General_options& options, | |
62 | const Input_objects* input_objects, | |
63 | Symbol_table* symtab, | |
64 | Layout* layout) | |
75f65a3e | 65 | : options_(options), input_objects_(input_objects), symtab_(symtab), |
92e059d8 | 66 | layout_(layout) |
a2fb1b05 ILT |
67 | { } |
68 | ||
92e059d8 | 69 | // Run the operation. |
a2fb1b05 | 70 | void |
17a1d0a9 | 71 | run(Workqueue*, const Task*); |
a2fb1b05 ILT |
72 | |
73 | private: | |
92e059d8 ILT |
74 | Layout_task_runner(const Layout_task_runner&); |
75 | Layout_task_runner& operator=(const Layout_task_runner&); | |
a2fb1b05 ILT |
76 | |
77 | const General_options& options_; | |
54dc6425 | 78 | const Input_objects* input_objects_; |
75f65a3e | 79 | Symbol_table* symtab_; |
12e14209 | 80 | Layout* layout_; |
a2fb1b05 ILT |
81 | }; |
82 | ||
83 | // This class handles the details of laying out input sections. | |
84 | ||
85 | class Layout | |
86 | { | |
87 | public: | |
e5756efb | 88 | Layout(const General_options& options, Script_options*); |
54dc6425 | 89 | |
ead1e424 ILT |
90 | // Given an input section SHNDX, named NAME, with data in SHDR, from |
91 | // the object file OBJECT, return the output section where this | |
730cdc88 ILT |
92 | // input section should go. RELOC_SHNDX is the index of a |
93 | // relocation section which applies to this section, or 0 if none, | |
94 | // or -1U if more than one. RELOC_TYPE is the type of the | |
95 | // relocation section if there is one. Set *OFFSET to the offset | |
96 | // within the output section. | |
a2fb1b05 ILT |
97 | template<int size, bool big_endian> |
98 | Output_section* | |
730cdc88 ILT |
99 | layout(Sized_relobj<size, big_endian> *object, unsigned int shndx, |
100 | const char* name, const elfcpp::Shdr<size, big_endian>& shdr, | |
101 | unsigned int reloc_shndx, unsigned int reloc_type, off_t* offset); | |
102 | ||
103 | // Like layout, only for exception frame sections. OBJECT is an | |
104 | // object file. SYMBOLS is the contents of the symbol table | |
105 | // section, with size SYMBOLS_SIZE. SYMBOL_NAMES is the contents of | |
106 | // the symbol name section, with size SYMBOL_NAMES_SIZE. SHNDX is a | |
107 | // .eh_frame section in OBJECT. SHDR is the section header. | |
108 | // RELOC_SHNDX is the index of a relocation section which applies to | |
109 | // this section, or 0 if none, or -1U if more than one. RELOC_TYPE | |
110 | // is the type of the relocation section if there is one. This | |
111 | // returns the output section, and sets *OFFSET to the offset. | |
112 | template<int size, bool big_endian> | |
113 | Output_section* | |
114 | layout_eh_frame(Sized_relobj<size, big_endian>* object, | |
115 | const unsigned char* symbols, | |
116 | off_t symbols_size, | |
117 | const unsigned char* symbol_names, | |
118 | off_t symbol_names_size, | |
119 | unsigned int shndx, | |
120 | const elfcpp::Shdr<size, big_endian>& shdr, | |
121 | unsigned int reloc_shndx, unsigned int reloc_type, | |
122 | off_t* offset); | |
a2fb1b05 | 123 | |
35cdfc9a ILT |
124 | // Handle a GNU stack note. This is called once per input object |
125 | // file. SEEN_GNU_STACK is true if the object file has a | |
126 | // .note.GNU-stack section. GNU_STACK_FLAGS is the section flags | |
127 | // from that section if there was one. | |
128 | void | |
129 | layout_gnu_stack(bool seen_gnu_stack, uint64_t gnu_stack_flags); | |
130 | ||
ead1e424 ILT |
131 | // Add an Output_section_data to the layout. This is used for |
132 | // special sections like the GOT section. | |
133 | void | |
134 | add_output_section_data(const char* name, elfcpp::Elf_Word type, | |
135 | elfcpp::Elf_Xword flags, | |
136 | Output_section_data*); | |
137 | ||
a3ad94ed ILT |
138 | // Create dynamic sections if necessary. |
139 | void | |
9b07f471 | 140 | create_initial_dynamic_sections(Symbol_table*); |
a3ad94ed | 141 | |
bfd58944 ILT |
142 | // Define __start and __stop symbols for output sections. |
143 | void | |
9b07f471 | 144 | define_section_symbols(Symbol_table*); |
bfd58944 | 145 | |
e5756efb ILT |
146 | // Define symbols from any linker script. |
147 | void | |
9b07f471 ILT |
148 | define_script_symbols(Symbol_table* symtab) |
149 | { this->script_options_->add_symbols_to_table(symtab); } | |
e5756efb | 150 | |
61ba1cf9 ILT |
151 | // Return the Stringpool used for symbol names. |
152 | const Stringpool* | |
153 | sympool() const | |
154 | { return &this->sympool_; } | |
155 | ||
16649710 ILT |
156 | // Return the Stringpool used for dynamic symbol names and dynamic |
157 | // tags. | |
158 | const Stringpool* | |
159 | dynpool() const | |
160 | { return &this->dynpool_; } | |
161 | ||
a2fb1b05 ILT |
162 | // Return whether a section is a .gnu.linkonce section, given the |
163 | // section name. | |
164 | static inline bool | |
165 | is_linkonce(const char* name) | |
166 | { return strncmp(name, ".gnu.linkonce", sizeof(".gnu.linkonce") - 1) == 0; } | |
167 | ||
168 | // Record the signature of a comdat section, and return whether to | |
169 | // include it in the link. The GROUP parameter is true for a | |
170 | // section group signature, false for a signature derived from a | |
171 | // .gnu.linkonce section. | |
172 | bool | |
173 | add_comdat(const char*, bool group); | |
174 | ||
54dc6425 | 175 | // Finalize the layout after all the input sections have been added. |
75f65a3e | 176 | off_t |
17a1d0a9 ILT |
177 | finalize(const Input_objects*, Symbol_table*, const Task*); |
178 | ||
179 | // Return whether any sections require postprocessing. | |
180 | bool | |
181 | any_postprocessing_sections() const | |
182 | { return this->any_postprocessing_sections_; } | |
54dc6425 | 183 | |
e44fcf3b ILT |
184 | // Return the size of the output file. |
185 | off_t | |
186 | output_file_size() const | |
187 | { return this->output_file_size_; } | |
188 | ||
16649710 ILT |
189 | // Return the TLS segment. This will return NULL if there isn't |
190 | // one. | |
92e059d8 ILT |
191 | Output_segment* |
192 | tls_segment() const | |
193 | { return this->tls_segment_; } | |
194 | ||
16649710 ILT |
195 | // Return the normal symbol table. |
196 | Output_section* | |
197 | symtab_section() const | |
198 | { | |
199 | gold_assert(this->symtab_section_ != NULL); | |
200 | return this->symtab_section_; | |
201 | } | |
202 | ||
203 | // Return the dynamic symbol table. | |
204 | Output_section* | |
205 | dynsym_section() const | |
206 | { | |
207 | gold_assert(this->dynsym_section_ != NULL); | |
208 | return this->dynsym_section_; | |
209 | } | |
210 | ||
211 | // Return the dynamic tags. | |
212 | Output_data_dynamic* | |
213 | dynamic_data() const | |
214 | { return this->dynamic_data_; } | |
215 | ||
730cdc88 ILT |
216 | // Write out the output sections. |
217 | void | |
218 | write_output_sections(Output_file* of) const; | |
219 | ||
61ba1cf9 ILT |
220 | // Write out data not associated with an input file or the symbol |
221 | // table. | |
222 | void | |
9025d29d | 223 | write_data(const Symbol_table*, Output_file*) const; |
61ba1cf9 | 224 | |
730cdc88 ILT |
225 | // Write out output sections which can not be written until all the |
226 | // input sections are complete. | |
227 | void | |
27bc2bce | 228 | write_sections_after_input_sections(Output_file* of); |
730cdc88 | 229 | |
ead1e424 ILT |
230 | // Return an output section named NAME, or NULL if there is none. |
231 | Output_section* | |
232 | find_output_section(const char* name) const; | |
233 | ||
234 | // Return an output segment of type TYPE, with segment flags SET set | |
235 | // and segment flags CLEAR clear. Return NULL if there is none. | |
236 | Output_segment* | |
237 | find_output_segment(elfcpp::PT type, elfcpp::Elf_Word set, | |
238 | elfcpp::Elf_Word clear) const; | |
239 | ||
535890bb ILT |
240 | // Set a flag to indicate that an object file uses the static TLS model. |
241 | void | |
242 | set_has_static_tls() | |
243 | { this->has_static_tls_ = true; } | |
244 | ||
245 | // Return true if any object file uses the static TLS model. | |
246 | bool | |
247 | has_static_tls() const | |
248 | { return this->has_static_tls_; } | |
249 | ||
e5756efb ILT |
250 | // Return the options which may be set by a linker script. |
251 | Script_options* | |
252 | script_options() | |
253 | { return this->script_options_; } | |
254 | ||
255 | const Script_options* | |
256 | script_options() const | |
257 | { return this->script_options_; } | |
d391083d | 258 | |
ad8f37d1 ILT |
259 | // Dump statistical information to stderr. |
260 | void | |
261 | print_stats() const; | |
262 | ||
a445fddf | 263 | // A list of segments. |
54dc6425 ILT |
264 | |
265 | typedef std::vector<Output_segment*> Segment_list; | |
266 | ||
a445fddf | 267 | // A list of sections. |
54dc6425 | 268 | |
a3ad94ed | 269 | typedef std::vector<Output_section*> Section_list; |
54dc6425 ILT |
270 | |
271 | // The list of information to write out which is not attached to | |
272 | // either a section or a segment. | |
a3ad94ed | 273 | typedef std::vector<Output_data*> Data_list; |
54dc6425 | 274 | |
a445fddf ILT |
275 | // Store the allocated sections into the section list. This is used |
276 | // by the linker script code. | |
277 | void | |
278 | get_allocated_sections(Section_list*) const; | |
279 | ||
280 | // Make a segment. This is used by the linker script code. | |
281 | Output_segment* | |
282 | make_output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags); | |
283 | ||
284 | // Return the number of segments. | |
285 | size_t | |
286 | segment_count() const | |
287 | { return this->segment_list_.size(); } | |
288 | ||
289 | // Map from section flags to segment flags. | |
290 | static elfcpp::Elf_Word | |
291 | section_flags_to_segment(elfcpp::Elf_Xword flags); | |
292 | ||
a2fb1b05 ILT |
293 | private: |
294 | Layout(const Layout&); | |
295 | Layout& operator=(const Layout&); | |
296 | ||
297 | // Mapping from .gnu.linkonce section names to output section names. | |
298 | struct Linkonce_mapping | |
299 | { | |
300 | const char* from; | |
301 | int fromlen; | |
302 | const char* to; | |
ead1e424 | 303 | int tolen; |
a2fb1b05 ILT |
304 | }; |
305 | static const Linkonce_mapping linkonce_mapping[]; | |
306 | static const int linkonce_mapping_count; | |
307 | ||
4f211c8b ILT |
308 | // Create a .note section for gold. |
309 | void | |
35cdfc9a ILT |
310 | create_gold_note(); |
311 | ||
312 | // Record whether the stack must be executable. | |
313 | void | |
314 | create_executable_stack_info(const Target*); | |
4f211c8b | 315 | |
75f65a3e ILT |
316 | // Find the first read-only PT_LOAD segment, creating one if |
317 | // necessary. | |
318 | Output_segment* | |
319 | find_first_load_seg(); | |
320 | ||
7bf1f802 ILT |
321 | // Count the local symbols in the regular symbol table and the dynamic |
322 | // symbol table, and build the respective string pools. | |
323 | void | |
17a1d0a9 | 324 | count_local_symbols(const Task*, const Input_objects*); |
7bf1f802 | 325 | |
54dc6425 ILT |
326 | // Create the output sections for the symbol table. |
327 | void | |
cb295612 | 328 | create_symtab_sections(const Input_objects*, Symbol_table*, off_t*); |
54dc6425 | 329 | |
75f65a3e ILT |
330 | // Create the .shstrtab section. |
331 | Output_section* | |
332 | create_shstrtab(); | |
333 | ||
334 | // Create the section header table. | |
27bc2bce | 335 | void |
9025d29d | 336 | create_shdrs(off_t*); |
54dc6425 | 337 | |
dbe717ef ILT |
338 | // Create the dynamic symbol table. |
339 | void | |
9b07f471 ILT |
340 | create_dynamic_symtab(const Input_objects*, Symbol_table*, |
341 | Output_section** pdynstr, | |
14b31740 ILT |
342 | unsigned int* plocal_dynamic_count, |
343 | std::vector<Symbol*>* pdynamic_symbols, | |
344 | Versions* versions); | |
dbe717ef | 345 | |
7bf1f802 ILT |
346 | // Assign offsets to each local portion of the dynamic symbol table. |
347 | void | |
348 | assign_local_dynsym_offsets(const Input_objects*); | |
349 | ||
a3ad94ed | 350 | // Finish the .dynamic section and PT_DYNAMIC segment. |
dbe717ef | 351 | void |
16649710 | 352 | finish_dynamic_section(const Input_objects*, const Symbol_table*); |
dbe717ef ILT |
353 | |
354 | // Create the .interp section and PT_INTERP segment. | |
355 | void | |
356 | create_interp(const Target* target); | |
357 | ||
14b31740 ILT |
358 | // Create the version sections. |
359 | void | |
9025d29d | 360 | create_version_sections(const Versions*, |
46fe1623 | 361 | const Symbol_table*, |
14b31740 ILT |
362 | unsigned int local_symcount, |
363 | const std::vector<Symbol*>& dynamic_symbols, | |
364 | const Output_section* dynstr); | |
365 | ||
366 | template<int size, bool big_endian> | |
367 | void | |
368 | sized_create_version_sections(const Versions* versions, | |
46fe1623 | 369 | const Symbol_table*, |
14b31740 ILT |
370 | unsigned int local_symcount, |
371 | const std::vector<Symbol*>& dynamic_symbols, | |
91da9340 ILT |
372 | const Output_section* dynstr |
373 | ACCEPT_SIZE_ENDIAN); | |
14b31740 | 374 | |
a2fb1b05 ILT |
375 | // Return whether to include this section in the link. |
376 | template<int size, bool big_endian> | |
377 | bool | |
730cdc88 | 378 | include_section(Sized_relobj<size, big_endian>* object, const char* name, |
a2fb1b05 ILT |
379 | const elfcpp::Shdr<size, big_endian>&); |
380 | ||
ead1e424 ILT |
381 | // Return the output section name to use given an input section |
382 | // name. Set *PLEN to the length of the name. *PLEN must be | |
383 | // initialized to the length of NAME. | |
384 | static const char* | |
385 | output_section_name(const char* name, size_t* plen); | |
386 | ||
a2fb1b05 | 387 | // Return the output section name to use for a linkonce section |
ead1e424 | 388 | // name. PLEN is as for output_section_name. |
a2fb1b05 | 389 | static const char* |
ead1e424 ILT |
390 | linkonce_output_name(const char* name, size_t* plen); |
391 | ||
392 | // Return the output section for NAME, TYPE and FLAGS. | |
393 | Output_section* | |
f0641a0b ILT |
394 | get_output_section(const char* name, Stringpool::Key name_key, |
395 | elfcpp::Elf_Word type, elfcpp::Elf_Xword flags); | |
a2fb1b05 | 396 | |
a445fddf ILT |
397 | // Choose the output section for NAME in RELOBJ. |
398 | Output_section* | |
399 | choose_output_section(const Relobj* relobj, const char* name, | |
400 | elfcpp::Elf_Word type, elfcpp::Elf_Xword flags, | |
401 | bool adjust_name); | |
402 | ||
a2fb1b05 ILT |
403 | // Create a new Output_section. |
404 | Output_section* | |
405 | make_output_section(const char* name, elfcpp::Elf_Word type, | |
406 | elfcpp::Elf_Xword flags); | |
407 | ||
dbe717ef ILT |
408 | // Set the final file offsets of all the segments. |
409 | off_t | |
410 | set_segment_offsets(const Target*, Output_segment*, unsigned int* pshndx); | |
411 | ||
86887060 | 412 | // Set the final file offsets of all the sections not associated |
9a0910c3 ILT |
413 | // with a segment. We set section offsets in three passes: the |
414 | // first handles all allocated sections, the second sections that | |
17a1d0a9 ILT |
415 | // require postprocessing, and the last the late-bound STRTAB |
416 | // sections (probably only shstrtab, which is the one we care about | |
417 | // because it holds section names). | |
9a0910c3 ILT |
418 | enum Section_offset_pass |
419 | { | |
420 | BEFORE_INPUT_SECTIONS_PASS, | |
17a1d0a9 ILT |
421 | POSTPROCESSING_SECTIONS_PASS, |
422 | STRTAB_AFTER_POSTPROCESSING_SECTIONS_PASS | |
9a0910c3 | 423 | }; |
dbe717ef | 424 | off_t |
9a0910c3 ILT |
425 | set_section_offsets(off_t, Section_offset_pass pass); |
426 | ||
86887060 ILT |
427 | // Set the final section indexes of all the sections not associated |
428 | // with a segment. Returns the next unused index. | |
429 | unsigned int | |
430 | set_section_indexes(unsigned int pshndx); | |
dbe717ef | 431 | |
a445fddf ILT |
432 | // Set the section addresses when using a script. |
433 | Output_segment* | |
434 | set_section_addresses_from_script(Symbol_table*); | |
435 | ||
a2fb1b05 ILT |
436 | // Return whether SEG1 comes before SEG2 in the output file. |
437 | static bool | |
b3168e9d | 438 | segment_precedes(const Output_segment* seg1, const Output_segment* seg2); |
a2fb1b05 | 439 | |
a2fb1b05 ILT |
440 | // A mapping used for group signatures. |
441 | typedef Unordered_map<std::string, bool> Signatures; | |
442 | ||
443 | // Mapping from input section name/type/flags to output section. We | |
444 | // use canonicalized strings here. | |
445 | ||
f0641a0b | 446 | typedef std::pair<Stringpool::Key, |
a2fb1b05 ILT |
447 | std::pair<elfcpp::Elf_Word, elfcpp::Elf_Xword> > Key; |
448 | ||
449 | struct Hash_key | |
450 | { | |
451 | size_t | |
452 | operator()(const Key& k) const; | |
453 | }; | |
454 | ||
455 | typedef Unordered_map<Key, Output_section*, Hash_key> Section_name_map; | |
456 | ||
457 | // A comparison class for segments. | |
458 | ||
459 | struct Compare_segments | |
460 | { | |
461 | bool | |
462 | operator()(const Output_segment* seg1, const Output_segment* seg2) | |
463 | { return Layout::segment_precedes(seg1, seg2); } | |
464 | }; | |
465 | ||
a2fb1b05 ILT |
466 | // A reference to the options on the command line. |
467 | const General_options& options_; | |
e5756efb ILT |
468 | // Information set by scripts or by command line options. |
469 | Script_options* script_options_; | |
a2fb1b05 ILT |
470 | // The output section names. |
471 | Stringpool namepool_; | |
75f65a3e ILT |
472 | // The output symbol names. |
473 | Stringpool sympool_; | |
a3ad94ed ILT |
474 | // The dynamic strings, if needed. |
475 | Stringpool dynpool_; | |
a2fb1b05 ILT |
476 | // The list of group sections and linkonce sections which we have seen. |
477 | Signatures signatures_; | |
478 | // The mapping from input section name/type/flags to output sections. | |
479 | Section_name_map section_name_map_; | |
480 | // The list of output segments. | |
481 | Segment_list segment_list_; | |
a3ad94ed ILT |
482 | // The list of output sections. |
483 | Section_list section_list_; | |
a2fb1b05 ILT |
484 | // The list of output sections which are not attached to any output |
485 | // segment. | |
a3ad94ed ILT |
486 | Section_list unattached_section_list_; |
487 | // The list of unattached Output_data objects which require special | |
488 | // handling because they are not Output_sections. | |
61ba1cf9 | 489 | Data_list special_output_list_; |
27bc2bce ILT |
490 | // The section headers. |
491 | Output_section_headers* section_headers_; | |
92e059d8 ILT |
492 | // A pointer to the PT_TLS segment if there is one. |
493 | Output_segment* tls_segment_; | |
a3ad94ed ILT |
494 | // The SHT_SYMTAB output section. |
495 | Output_section* symtab_section_; | |
496 | // The SHT_DYNSYM output section if there is one. | |
497 | Output_section* dynsym_section_; | |
498 | // The SHT_DYNAMIC output section if there is one. | |
499 | Output_section* dynamic_section_; | |
16649710 ILT |
500 | // The dynamic data which goes into dynamic_section_. |
501 | Output_data_dynamic* dynamic_data_; | |
730cdc88 | 502 | // The exception frame output section if there is one. |
3151305a | 503 | Output_section* eh_frame_section_; |
730cdc88 ILT |
504 | // The exception frame data for eh_frame_section_. |
505 | Eh_frame* eh_frame_data_; | |
506 | // The exception frame header output section if there is one. | |
507 | Output_section* eh_frame_hdr_section_; | |
e44fcf3b ILT |
508 | // The size of the output file. |
509 | off_t output_file_size_; | |
35cdfc9a ILT |
510 | // Whether we have seen an object file marked to require an |
511 | // executable stack. | |
512 | bool input_requires_executable_stack_; | |
513 | // Whether we have seen at least one object file with an executable | |
514 | // stack marker. | |
515 | bool input_with_gnu_stack_note_; | |
516 | // Whether we have seen at least one object file without an | |
517 | // executable stack marker. | |
518 | bool input_without_gnu_stack_note_; | |
535890bb ILT |
519 | // Whether we have seen an object file that uses the static TLS model. |
520 | bool has_static_tls_; | |
17a1d0a9 ILT |
521 | // Whether any sections require postprocessing. |
522 | bool any_postprocessing_sections_; | |
61ba1cf9 ILT |
523 | }; |
524 | ||
730cdc88 ILT |
525 | // This task handles writing out data in output sections which is not |
526 | // part of an input section, or which requires special handling. When | |
527 | // this is done, it unblocks both output_sections_blocker and | |
528 | // final_blocker. | |
529 | ||
530 | class Write_sections_task : public Task | |
531 | { | |
532 | public: | |
533 | Write_sections_task(const Layout* layout, Output_file* of, | |
534 | Task_token* output_sections_blocker, | |
535 | Task_token* final_blocker) | |
536 | : layout_(layout), of_(of), | |
537 | output_sections_blocker_(output_sections_blocker), | |
538 | final_blocker_(final_blocker) | |
539 | { } | |
540 | ||
541 | // The standard Task methods. | |
542 | ||
17a1d0a9 ILT |
543 | Task_token* |
544 | is_runnable(); | |
730cdc88 | 545 | |
17a1d0a9 ILT |
546 | void |
547 | locks(Task_locker*); | |
730cdc88 ILT |
548 | |
549 | void | |
550 | run(Workqueue*); | |
551 | ||
c7912668 ILT |
552 | std::string |
553 | get_name() const | |
554 | { return "Write_sections_task"; } | |
555 | ||
730cdc88 ILT |
556 | private: |
557 | class Write_sections_locker; | |
558 | ||
559 | const Layout* layout_; | |
560 | Output_file* of_; | |
561 | Task_token* output_sections_blocker_; | |
562 | Task_token* final_blocker_; | |
563 | }; | |
564 | ||
61ba1cf9 ILT |
565 | // This task handles writing out data which is not part of a section |
566 | // or segment. | |
567 | ||
568 | class Write_data_task : public Task | |
569 | { | |
570 | public: | |
a3ad94ed | 571 | Write_data_task(const Layout* layout, const Symbol_table* symtab, |
9025d29d ILT |
572 | Output_file* of, Task_token* final_blocker) |
573 | : layout_(layout), symtab_(symtab), of_(of), final_blocker_(final_blocker) | |
61ba1cf9 ILT |
574 | { } |
575 | ||
576 | // The standard Task methods. | |
577 | ||
17a1d0a9 ILT |
578 | Task_token* |
579 | is_runnable(); | |
61ba1cf9 | 580 | |
17a1d0a9 ILT |
581 | void |
582 | locks(Task_locker*); | |
61ba1cf9 ILT |
583 | |
584 | void | |
585 | run(Workqueue*); | |
586 | ||
c7912668 ILT |
587 | std::string |
588 | get_name() const | |
589 | { return "Write_data_task"; } | |
590 | ||
61ba1cf9 ILT |
591 | private: |
592 | const Layout* layout_; | |
a3ad94ed | 593 | const Symbol_table* symtab_; |
61ba1cf9 ILT |
594 | Output_file* of_; |
595 | Task_token* final_blocker_; | |
596 | }; | |
597 | ||
598 | // This task handles writing out the global symbols. | |
599 | ||
600 | class Write_symbols_task : public Task | |
601 | { | |
602 | public: | |
9a2d6984 ILT |
603 | Write_symbols_task(const Symbol_table* symtab, |
604 | const Input_objects* input_objects, | |
16649710 ILT |
605 | const Stringpool* sympool, const Stringpool* dynpool, |
606 | Output_file* of, Task_token* final_blocker) | |
9a2d6984 ILT |
607 | : symtab_(symtab), input_objects_(input_objects), sympool_(sympool), |
608 | dynpool_(dynpool), of_(of), final_blocker_(final_blocker) | |
61ba1cf9 ILT |
609 | { } |
610 | ||
611 | // The standard Task methods. | |
612 | ||
17a1d0a9 ILT |
613 | Task_token* |
614 | is_runnable(); | |
61ba1cf9 | 615 | |
17a1d0a9 ILT |
616 | void |
617 | locks(Task_locker*); | |
61ba1cf9 ILT |
618 | |
619 | void | |
620 | run(Workqueue*); | |
621 | ||
c7912668 ILT |
622 | std::string |
623 | get_name() const | |
624 | { return "Write_symbols_task"; } | |
625 | ||
61ba1cf9 ILT |
626 | private: |
627 | const Symbol_table* symtab_; | |
9a2d6984 | 628 | const Input_objects* input_objects_; |
61ba1cf9 | 629 | const Stringpool* sympool_; |
16649710 | 630 | const Stringpool* dynpool_; |
61ba1cf9 ILT |
631 | Output_file* of_; |
632 | Task_token* final_blocker_; | |
633 | }; | |
634 | ||
730cdc88 ILT |
635 | // This task handles writing out data in output sections which can't |
636 | // be written out until all the input sections have been handled. | |
637 | // This is for sections whose contents is based on the contents of | |
638 | // other output sections. | |
639 | ||
640 | class Write_after_input_sections_task : public Task | |
641 | { | |
642 | public: | |
27bc2bce | 643 | Write_after_input_sections_task(Layout* layout, Output_file* of, |
730cdc88 ILT |
644 | Task_token* input_sections_blocker, |
645 | Task_token* final_blocker) | |
646 | : layout_(layout), of_(of), | |
647 | input_sections_blocker_(input_sections_blocker), | |
648 | final_blocker_(final_blocker) | |
649 | { } | |
650 | ||
651 | // The standard Task methods. | |
652 | ||
17a1d0a9 ILT |
653 | Task_token* |
654 | is_runnable(); | |
730cdc88 | 655 | |
17a1d0a9 ILT |
656 | void |
657 | locks(Task_locker*); | |
730cdc88 ILT |
658 | |
659 | void | |
660 | run(Workqueue*); | |
661 | ||
c7912668 ILT |
662 | std::string |
663 | get_name() const | |
664 | { return "Write_after_input_sections_task"; } | |
665 | ||
730cdc88 | 666 | private: |
27bc2bce | 667 | Layout* layout_; |
730cdc88 ILT |
668 | Output_file* of_; |
669 | Task_token* input_sections_blocker_; | |
670 | Task_token* final_blocker_; | |
671 | }; | |
672 | ||
92e059d8 | 673 | // This task function handles closing the file. |
61ba1cf9 | 674 | |
92e059d8 | 675 | class Close_task_runner : public Task_function_runner |
61ba1cf9 ILT |
676 | { |
677 | public: | |
92e059d8 ILT |
678 | Close_task_runner(Output_file* of) |
679 | : of_(of) | |
61ba1cf9 ILT |
680 | { } |
681 | ||
92e059d8 | 682 | // Run the operation. |
61ba1cf9 | 683 | void |
17a1d0a9 | 684 | run(Workqueue*, const Task*); |
61ba1cf9 ILT |
685 | |
686 | private: | |
687 | Output_file* of_; | |
a2fb1b05 ILT |
688 | }; |
689 | ||
ead1e424 ILT |
690 | // A small helper function to align an address. |
691 | ||
692 | inline uint64_t | |
693 | align_address(uint64_t address, uint64_t addralign) | |
694 | { | |
695 | if (addralign != 0) | |
696 | address = (address + addralign - 1) &~ (addralign - 1); | |
697 | return address; | |
698 | } | |
699 | ||
a2fb1b05 ILT |
700 | } // End namespace gold. |
701 | ||
702 | #endif // !defined(GOLD_LAYOUT_H) |