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a2fb1b05 ILT |
1 | // output.h -- manage the output file for gold -*- C++ -*- |
2 | ||
3 | #ifndef GOLD_OUTPUT_H | |
4 | #define GOLD_OUTPUT_H | |
5 | ||
75f65a3e | 6 | #include <cassert> |
a2fb1b05 | 7 | #include <list> |
ead1e424 | 8 | #include <vector> |
a2fb1b05 ILT |
9 | |
10 | #include "elfcpp.h" | |
54dc6425 | 11 | #include "layout.h" |
c06b7b0b | 12 | #include "reloc-types.h" |
a2fb1b05 ILT |
13 | |
14 | namespace gold | |
15 | { | |
16 | ||
61ba1cf9 | 17 | class General_options; |
a2fb1b05 ILT |
18 | class Object; |
19 | class Output_file; | |
c06b7b0b | 20 | class Output_section; |
54dc6425 ILT |
21 | template<int size, bool big_endian> |
22 | class Sized_target; | |
c06b7b0b ILT |
23 | template<int size, bool big_endian> |
24 | class Sized_relobj; | |
54dc6425 ILT |
25 | |
26 | // An abtract class for data which has to go into the output file. | |
a2fb1b05 ILT |
27 | |
28 | class Output_data | |
29 | { | |
30 | public: | |
75f65a3e | 31 | explicit Output_data(off_t data_size = 0) |
61ba1cf9 | 32 | : address_(0), data_size_(data_size), offset_(-1) |
a2fb1b05 ILT |
33 | { } |
34 | ||
35 | virtual | |
36 | ~Output_data(); | |
37 | ||
ead1e424 ILT |
38 | // Return the address. This is only valid after Layout::finalize is |
39 | // finished. | |
75f65a3e ILT |
40 | uint64_t |
41 | address() const | |
42 | { return this->address_; } | |
43 | ||
ead1e424 ILT |
44 | // Return the size of the data. This must be valid after |
45 | // Layout::finalize calls set_address, but need not be valid before | |
46 | // then. | |
a2fb1b05 | 47 | off_t |
75f65a3e ILT |
48 | data_size() const |
49 | { return this->data_size_; } | |
50 | ||
ead1e424 ILT |
51 | // Return the file offset. This is only valid after |
52 | // Layout::finalize is finished. | |
75f65a3e ILT |
53 | off_t |
54 | offset() const | |
55 | { return this->offset_; } | |
56 | ||
57 | // Return the required alignment. | |
58 | uint64_t | |
59 | addralign() const | |
60 | { return this->do_addralign(); } | |
61 | ||
62 | // Return whether this is an Output_section. | |
63 | bool | |
64 | is_section() const | |
65 | { return this->do_is_section(); } | |
66 | ||
67 | // Return whether this is an Output_section of the specified type. | |
68 | bool | |
69 | is_section_type(elfcpp::Elf_Word stt) const | |
70 | { return this->do_is_section_type(stt); } | |
71 | ||
72 | // Return whether this is an Output_section with the specified flag | |
73 | // set. | |
74 | bool | |
75 | is_section_flag_set(elfcpp::Elf_Xword shf) const | |
76 | { return this->do_is_section_flag_set(shf); } | |
77 | ||
ead1e424 ILT |
78 | // Return the output section index, if there is an output section. |
79 | unsigned int | |
80 | out_shndx() const | |
81 | { return this->do_out_shndx(); } | |
82 | ||
83 | // Set the output section index, if this is an output section. | |
84 | void | |
85 | set_out_shndx(unsigned int shndx) | |
86 | { this->do_set_out_shndx(shndx); } | |
87 | ||
88 | // Set the address and file offset of this data. This is called | |
89 | // during Layout::finalize. | |
75f65a3e ILT |
90 | void |
91 | set_address(uint64_t addr, off_t off); | |
92 | ||
ead1e424 ILT |
93 | // Write the data to the output file. This is called after |
94 | // Layout::finalize is complete. | |
75f65a3e ILT |
95 | void |
96 | write(Output_file* file) | |
97 | { this->do_write(file); } | |
a2fb1b05 | 98 | |
75f65a3e ILT |
99 | protected: |
100 | // Functions that child classes may or in some cases must implement. | |
101 | ||
102 | // Write the data to the output file. | |
a2fb1b05 | 103 | virtual void |
75f65a3e ILT |
104 | do_write(Output_file*) = 0; |
105 | ||
106 | // Return the required alignment. | |
107 | virtual uint64_t | |
108 | do_addralign() const = 0; | |
109 | ||
110 | // Return whether this is an Output_section. | |
111 | virtual bool | |
112 | do_is_section() const | |
113 | { return false; } | |
a2fb1b05 | 114 | |
54dc6425 | 115 | // Return whether this is an Output_section of the specified type. |
75f65a3e | 116 | // This only needs to be implement by Output_section. |
54dc6425 | 117 | virtual bool |
75f65a3e | 118 | do_is_section_type(elfcpp::Elf_Word) const |
54dc6425 ILT |
119 | { return false; } |
120 | ||
75f65a3e ILT |
121 | // Return whether this is an Output_section with the specific flag |
122 | // set. This only needs to be implemented by Output_section. | |
54dc6425 | 123 | virtual bool |
75f65a3e | 124 | do_is_section_flag_set(elfcpp::Elf_Xword) const |
54dc6425 ILT |
125 | { return false; } |
126 | ||
ead1e424 ILT |
127 | // Return the output section index, if there is an output section. |
128 | virtual unsigned int | |
129 | do_out_shndx() const | |
130 | { abort(); } | |
131 | ||
132 | // Set the output section index, if this is an output section. | |
133 | virtual void | |
134 | do_set_out_shndx(unsigned int) | |
135 | { abort(); } | |
136 | ||
75f65a3e ILT |
137 | // Set the address and file offset of the data. This only needs to |
138 | // be implemented if the child needs to know. | |
139 | virtual void | |
140 | do_set_address(uint64_t, off_t) | |
141 | { } | |
142 | ||
143 | // Functions that child classes may call. | |
144 | ||
a2fb1b05 ILT |
145 | // Set the size of the data. |
146 | void | |
75f65a3e ILT |
147 | set_data_size(off_t data_size) |
148 | { this->data_size_ = data_size; } | |
149 | ||
150 | // Return default alignment for a size--32 or 64. | |
151 | static uint64_t | |
152 | default_alignment(int size); | |
a2fb1b05 ILT |
153 | |
154 | private: | |
155 | Output_data(const Output_data&); | |
156 | Output_data& operator=(const Output_data&); | |
157 | ||
75f65a3e ILT |
158 | // Memory address in file (not always meaningful). |
159 | uint64_t address_; | |
a2fb1b05 | 160 | // Size of data in file. |
75f65a3e ILT |
161 | off_t data_size_; |
162 | // Offset within file. | |
163 | off_t offset_; | |
a2fb1b05 ILT |
164 | }; |
165 | ||
54dc6425 ILT |
166 | // Output the section headers. |
167 | ||
168 | class Output_section_headers : public Output_data | |
169 | { | |
170 | public: | |
75f65a3e | 171 | Output_section_headers(int size, |
61ba1cf9 | 172 | bool big_endian, |
75f65a3e | 173 | const Layout::Segment_list&, |
61ba1cf9 ILT |
174 | const Layout::Section_list&, |
175 | const Stringpool*); | |
54dc6425 ILT |
176 | |
177 | // Write the data to the file. | |
178 | void | |
75f65a3e ILT |
179 | do_write(Output_file*); |
180 | ||
181 | // Return the required alignment. | |
182 | uint64_t | |
183 | do_addralign() const | |
184 | { return Output_data::default_alignment(this->size_); } | |
54dc6425 ILT |
185 | |
186 | private: | |
61ba1cf9 ILT |
187 | // Write the data to the file with the right size and endianness. |
188 | template<int size, bool big_endian> | |
189 | void | |
190 | do_sized_write(Output_file*); | |
191 | ||
75f65a3e | 192 | int size_; |
61ba1cf9 | 193 | bool big_endian_; |
54dc6425 ILT |
194 | const Layout::Segment_list& segment_list_; |
195 | const Layout::Section_list& section_list_; | |
61ba1cf9 | 196 | const Stringpool* secnamepool_; |
54dc6425 ILT |
197 | }; |
198 | ||
199 | // Output the segment headers. | |
200 | ||
201 | class Output_segment_headers : public Output_data | |
202 | { | |
203 | public: | |
61ba1cf9 ILT |
204 | Output_segment_headers(int size, bool big_endian, |
205 | const Layout::Segment_list& segment_list); | |
54dc6425 ILT |
206 | |
207 | // Write the data to the file. | |
208 | void | |
75f65a3e ILT |
209 | do_write(Output_file*); |
210 | ||
211 | // Return the required alignment. | |
212 | uint64_t | |
213 | do_addralign() const | |
214 | { return Output_data::default_alignment(this->size_); } | |
54dc6425 ILT |
215 | |
216 | private: | |
61ba1cf9 ILT |
217 | // Write the data to the file with the right size and endianness. |
218 | template<int size, bool big_endian> | |
219 | void | |
220 | do_sized_write(Output_file*); | |
221 | ||
75f65a3e | 222 | int size_; |
61ba1cf9 | 223 | bool big_endian_; |
54dc6425 ILT |
224 | const Layout::Segment_list& segment_list_; |
225 | }; | |
226 | ||
227 | // Output the ELF file header. | |
228 | ||
229 | class Output_file_header : public Output_data | |
230 | { | |
231 | public: | |
75f65a3e | 232 | Output_file_header(int size, |
61ba1cf9 | 233 | bool big_endian, |
75f65a3e | 234 | const General_options&, |
54dc6425 ILT |
235 | const Target*, |
236 | const Symbol_table*, | |
75f65a3e ILT |
237 | const Output_segment_headers*); |
238 | ||
239 | // Add information about the section headers. We lay out the ELF | |
240 | // file header before we create the section headers. | |
241 | void set_section_info(const Output_section_headers*, | |
242 | const Output_section* shstrtab); | |
54dc6425 ILT |
243 | |
244 | // Write the data to the file. | |
245 | void | |
75f65a3e ILT |
246 | do_write(Output_file*); |
247 | ||
248 | // Return the required alignment. | |
249 | uint64_t | |
250 | do_addralign() const | |
251 | { return Output_data::default_alignment(this->size_); } | |
252 | ||
253 | // Set the address and offset--we only implement this for error | |
254 | // checking. | |
255 | void | |
256 | do_set_address(uint64_t, off_t off) const | |
257 | { assert(off == 0); } | |
54dc6425 ILT |
258 | |
259 | private: | |
61ba1cf9 ILT |
260 | // Write the data to the file with the right size and endianness. |
261 | template<int size, bool big_endian> | |
262 | void | |
263 | do_sized_write(Output_file*); | |
264 | ||
75f65a3e | 265 | int size_; |
61ba1cf9 | 266 | bool big_endian_; |
54dc6425 ILT |
267 | const General_options& options_; |
268 | const Target* target_; | |
269 | const Symbol_table* symtab_; | |
61ba1cf9 | 270 | const Output_segment_headers* segment_header_; |
54dc6425 ILT |
271 | const Output_section_headers* section_header_; |
272 | const Output_section* shstrtab_; | |
273 | }; | |
274 | ||
ead1e424 ILT |
275 | // Output sections are mainly comprised of input sections. However, |
276 | // there are cases where we have data to write out which is not in an | |
277 | // input section. Output_section_data is used in such cases. This is | |
278 | // an abstract base class. | |
279 | ||
280 | class Output_section_data : public Output_data | |
281 | { | |
282 | public: | |
283 | Output_section_data(off_t data_size, uint64_t addralign) | |
284 | : Output_data(data_size), output_section_(NULL), addralign_(addralign) | |
285 | { } | |
286 | ||
287 | Output_section_data(uint64_t addralign) | |
288 | : Output_data(0), output_section_(NULL), addralign_(addralign) | |
289 | { } | |
290 | ||
291 | // Record the output section. | |
292 | void | |
293 | set_output_section(Output_section* os) | |
294 | { | |
295 | assert(this->output_section_ == NULL); | |
296 | this->output_section_ = os; | |
297 | } | |
298 | ||
299 | protected: | |
300 | // The child class must implement do_write. | |
301 | ||
302 | // Return the required alignment. | |
303 | uint64_t | |
304 | do_addralign() const | |
305 | { return this->addralign_; } | |
306 | ||
307 | // Return the section index of the output section. | |
308 | unsigned int | |
309 | do_out_shndx() const; | |
310 | ||
311 | private: | |
312 | // The output section for this section. | |
313 | const Output_section* output_section_; | |
314 | // The required alignment. | |
315 | uint64_t addralign_; | |
316 | }; | |
317 | ||
dbe717ef ILT |
318 | // A simple case of Output_data in which we have constant data to |
319 | // output. | |
ead1e424 | 320 | |
dbe717ef | 321 | class Output_data_const : public Output_section_data |
ead1e424 ILT |
322 | { |
323 | public: | |
dbe717ef ILT |
324 | Output_data_const(const std::string& data, uint64_t addralign) |
325 | : Output_section_data(data.size(), addralign), data_(data) | |
326 | { } | |
327 | ||
328 | Output_data_const(const char* p, off_t len, uint64_t addralign) | |
329 | : Output_section_data(len, addralign), data_(p, len) | |
330 | { } | |
331 | ||
332 | Output_data_const(const unsigned char* p, off_t len, uint64_t addralign) | |
333 | : Output_section_data(len, addralign), | |
334 | data_(reinterpret_cast<const char*>(p), len) | |
335 | { } | |
336 | ||
337 | // Write the data to the file. | |
338 | void | |
339 | do_write(Output_file* output); | |
340 | ||
341 | private: | |
342 | std::string data_; | |
343 | }; | |
344 | ||
345 | // Output_data_common is used to handle the common symbols. This is | |
346 | // quite simple. | |
347 | ||
348 | class Output_data_common : public Output_section_data | |
349 | { | |
350 | public: | |
351 | Output_data_common(uint64_t addralign) | |
ead1e424 ILT |
352 | : Output_section_data(addralign) |
353 | { } | |
354 | ||
355 | // Set the size. | |
356 | void | |
357 | set_common_size(off_t common_size) | |
358 | { this->set_data_size(common_size); } | |
359 | ||
360 | // Write out the data--there is nothing to do, as common symbols are | |
361 | // always zero and are stored in the BSS. | |
362 | void | |
363 | do_write(Output_file*) | |
364 | { } | |
365 | }; | |
366 | ||
c06b7b0b ILT |
367 | // This POD class is used to represent a single reloc in the output |
368 | // file. This could be a private class within Output_data_reloc, but | |
369 | // the templatization is complex enough that I broke it out into a | |
370 | // separate class. The class is templatized on either elfcpp::SHT_REL | |
371 | // or elfcpp::SHT_RELA, and also on whether this is a dynamic | |
372 | // relocation or an ordinary relocation. | |
373 | ||
374 | // A relocation can be against a global symbol, a local symbol, an | |
375 | // output section, or the undefined symbol at index 0. We represent | |
376 | // the latter by using a NULL global symbol. | |
377 | ||
378 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
379 | class Output_reloc; | |
380 | ||
381 | template<bool dynamic, int size, bool big_endian> | |
382 | class Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> | |
383 | { | |
384 | public: | |
385 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
386 | ||
387 | // An uninitialized entry. We need this because we want to put | |
388 | // instances of this class into an STL container. | |
389 | Output_reloc() | |
390 | : local_sym_index_(INVALID_CODE) | |
391 | { } | |
392 | ||
393 | // A reloc against a global symbol. | |
394 | Output_reloc(Symbol* gsym, unsigned int type, Address address) | |
395 | : local_sym_index_(GSYM_CODE), type_(type), address_(address) | |
396 | { this->u_.gsym = gsym; } | |
397 | ||
398 | // A reloc against a local symbol. | |
399 | Output_reloc(Sized_relobj<size, big_endian>* object, | |
400 | unsigned int local_sym_index, | |
401 | unsigned int type, Address address) | |
402 | : local_sym_index_(local_sym_index), type_(type), address_(address) | |
403 | { | |
404 | assert(local_sym_index != GSYM_CODE && local_sym_index != INVALID_CODE); | |
405 | this->u_.object = object; | |
406 | } | |
407 | ||
408 | // A reloc against the STT_SECTION symbol of an output section. | |
409 | Output_reloc(Output_section* os, unsigned int type, Address address) | |
410 | : local_sym_index_(SECTION_CODE), type_(type), address_(address) | |
411 | { this->u_.os = os; } | |
412 | ||
413 | // Write the reloc entry to an output view. | |
414 | void | |
415 | write(unsigned char* pov) const; | |
416 | ||
417 | // Write the offset and info fields to Write_rel. | |
418 | template<typename Write_rel> | |
419 | void write_rel(Write_rel*) const; | |
420 | ||
421 | private: | |
422 | // Return the symbol index. We can't do a double template | |
423 | // specialization, so we do a secondary template here. | |
424 | unsigned int | |
425 | get_symbol_index() const; | |
426 | ||
427 | // Codes for local_sym_index_. | |
428 | enum | |
429 | { | |
430 | // Global symbol. | |
431 | GSYM_CODE = -1U, | |
432 | // Output section. | |
433 | SECTION_CODE = -2U, | |
434 | // Invalid uninitialized entry. | |
435 | INVALID_CODE = -3U | |
436 | }; | |
437 | ||
438 | union | |
439 | { | |
440 | // For a local symbol, the object. We will never generate a | |
441 | // relocation against a local symbol in a dynamic object; that | |
442 | // doesn't make sense. And our callers will always be | |
443 | // templatized, so we use Sized_relobj here. | |
444 | Sized_relobj<size, big_endian>* object; | |
445 | // For a global symbol, the symbol. If this is NULL, it indicates | |
446 | // a relocation against the undefined 0 symbol. | |
447 | Symbol* gsym; | |
448 | // For a relocation against an output section, the output section. | |
449 | Output_section* os; | |
450 | } u_; | |
451 | // For a local symbol, the local symbol index. This is GSYM_CODE | |
452 | // for a global symbol, or INVALID_CODE for an uninitialized value. | |
453 | unsigned int local_sym_index_; | |
454 | unsigned int type_; | |
455 | Address address_; | |
456 | }; | |
457 | ||
458 | // The SHT_RELA version of Output_reloc<>. This is just derived from | |
459 | // the SHT_REL version of Output_reloc, but it adds an addend. | |
460 | ||
461 | template<bool dynamic, int size, bool big_endian> | |
462 | class Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
463 | { | |
464 | public: | |
465 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
466 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend; | |
467 | ||
468 | // An uninitialized entry. | |
469 | Output_reloc() | |
470 | : rel_() | |
471 | { } | |
472 | ||
473 | // A reloc against a global symbol. | |
474 | Output_reloc(Symbol* gsym, unsigned int type, Address address, Addend addend) | |
475 | : rel_(gsym, type, address), addend_(addend) | |
476 | { } | |
477 | ||
478 | // A reloc against a local symbol. | |
479 | Output_reloc(Sized_relobj<size, big_endian>* object, | |
480 | unsigned int local_sym_index, | |
481 | unsigned int type, Address address, Addend addend) | |
482 | : rel_(object, local_sym_index, type, address), addend_(addend) | |
483 | { } | |
484 | ||
485 | // A reloc against the STT_SECTION symbol of an output section. | |
486 | Output_reloc(Output_section* os, unsigned int type, Address address, | |
487 | Addend addend) | |
488 | : rel_(os, type, address), addend_(addend) | |
489 | { } | |
490 | ||
491 | // Write the reloc entry to an output view. | |
492 | void | |
493 | write(unsigned char* pov) const; | |
494 | ||
495 | private: | |
496 | // The basic reloc. | |
497 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> rel_; | |
498 | // The addend. | |
499 | Addend addend_; | |
500 | }; | |
501 | ||
502 | // Output_data_reloc is used to manage a section containing relocs. | |
503 | // SH_TYPE is either elfcpp::SHT_REL or elfcpp::SHT_RELA. DYNAMIC | |
504 | // indicates whether this is a dynamic relocation or a normal | |
505 | // relocation. Output_data_reloc_base is a base class. | |
506 | // Output_data_reloc is the real class, which we specialize based on | |
507 | // the reloc type. | |
508 | ||
509 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
510 | class Output_data_reloc_base : public Output_section_data | |
511 | { | |
512 | public: | |
513 | typedef Output_reloc<sh_type, dynamic, size, big_endian> Output_reloc_type; | |
514 | typedef typename Output_reloc_type::Address Address; | |
515 | static const int reloc_size = | |
516 | Reloc_types<sh_type, size, big_endian>::reloc_size; | |
517 | ||
518 | // Construct the section. | |
519 | Output_data_reloc_base() | |
520 | : Output_section_data(Output_data::default_alignment(size)) | |
521 | { } | |
522 | ||
523 | // Write out the data. | |
524 | void | |
525 | do_write(Output_file*); | |
526 | ||
527 | protected: | |
528 | // Add a relocation entry. | |
529 | void | |
530 | add(const Output_reloc_type& reloc) | |
531 | { | |
532 | this->relocs_.push_back(reloc); | |
533 | this->set_data_size(this->relocs_.size() * reloc_size); | |
534 | } | |
535 | ||
536 | private: | |
537 | typedef std::vector<Output_reloc_type> Relocs; | |
538 | ||
539 | Relocs relocs_; | |
540 | }; | |
541 | ||
542 | // The class which callers actually create. | |
543 | ||
544 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
545 | class Output_data_reloc; | |
546 | ||
547 | // The SHT_REL version of Output_data_reloc. | |
548 | ||
549 | template<bool dynamic, int size, bool big_endian> | |
550 | class Output_data_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> | |
551 | : public Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian> | |
552 | { | |
553 | private: | |
554 | typedef Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, | |
555 | big_endian> Base; | |
556 | ||
557 | public: | |
558 | typedef typename Base::Output_reloc_type Output_reloc_type; | |
559 | typedef typename Output_reloc_type::Address Address; | |
560 | ||
561 | Output_data_reloc() | |
562 | : Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian>() | |
563 | { } | |
564 | ||
565 | // Add a reloc against a global symbol. | |
566 | void | |
567 | add_global(Symbol* gsym, unsigned int type, Address address) | |
568 | { this->add(Output_reloc_type(gsym, type, address)); } | |
569 | ||
570 | // Add a reloc against a local symbol. | |
571 | void | |
572 | add_local(Sized_relobj<size, big_endian>* object, | |
573 | unsigned int local_sym_index, unsigned int type, Address address) | |
574 | { this->add(Output_reloc_type(object, local_sym_index, type, address)); } | |
575 | ||
576 | // A reloc against the STT_SECTION symbol of an output section. | |
577 | void | |
578 | add_output_section(Output_section* os, unsigned int type, Address address) | |
579 | { this->add(Output_reloc_type(os, type, address)); } | |
580 | }; | |
581 | ||
582 | // The SHT_RELA version of Output_data_reloc. | |
583 | ||
584 | template<bool dynamic, int size, bool big_endian> | |
585 | class Output_data_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
586 | : public Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
587 | { | |
588 | private: | |
589 | typedef Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, | |
590 | big_endian> Base; | |
591 | ||
592 | public: | |
593 | typedef typename Base::Output_reloc_type Output_reloc_type; | |
594 | typedef typename Output_reloc_type::Address Address; | |
595 | typedef typename Output_reloc_type::Addend Addend; | |
596 | ||
597 | Output_data_reloc() | |
598 | : Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian>() | |
599 | { } | |
600 | ||
601 | // Add a reloc against a global symbol. | |
602 | void | |
603 | add_global(Symbol* gsym, unsigned int type, Address address, Addend addend) | |
604 | { this->add(Output_reloc_type(gsym, type, address, addend)); } | |
605 | ||
606 | // Add a reloc against a local symbol. | |
607 | void | |
608 | add_local(Sized_relobj<size, big_endian>* object, | |
609 | unsigned int local_sym_index, unsigned int type, | |
610 | Address address, Addend addend) | |
611 | { | |
612 | this->add(Output_reloc_type(object, local_sym_index, type, address, | |
613 | addend)); | |
614 | } | |
615 | ||
616 | // A reloc against the STT_SECTION symbol of an output section. | |
617 | void | |
618 | add_output_section(Output_section* os, unsigned int type, Address address, | |
619 | Addend addend) | |
620 | { this->add(Output_reloc_type(os, type, address, addend)); } | |
621 | }; | |
622 | ||
dbe717ef ILT |
623 | // Output_data_got is used to manage a GOT. Each entry in the GOT is |
624 | // for one symbol--either a global symbol or a local symbol in an | |
ead1e424 | 625 | // object. The target specific code adds entries to the GOT as |
dbe717ef | 626 | // needed. |
ead1e424 ILT |
627 | |
628 | template<int size, bool big_endian> | |
dbe717ef | 629 | class Output_data_got : public Output_section_data |
ead1e424 ILT |
630 | { |
631 | public: | |
632 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
633 | ||
dbe717ef | 634 | Output_data_got() |
ead1e424 ILT |
635 | : Output_section_data(Output_data::default_alignment(size)), |
636 | entries_() | |
637 | { } | |
638 | ||
dbe717ef ILT |
639 | // Add an entry for a global symbol to the GOT. Return true if this |
640 | // is a new GOT entry, false if the symbol was already in the GOT. | |
641 | bool | |
642 | add_global(Symbol* gsym); | |
ead1e424 ILT |
643 | |
644 | // Add an entry for a local symbol to the GOT. This returns the | |
645 | // offset of the new entry from the start of the GOT. | |
646 | unsigned int | |
647 | add_local(Object* object, unsigned int sym_index) | |
648 | { | |
649 | this->entries_.push_back(Got_entry(object, sym_index)); | |
650 | this->set_got_size(); | |
651 | return this->last_got_offset(); | |
652 | } | |
653 | ||
654 | // Add a constant to the GOT. This returns the offset of the new | |
655 | // entry from the start of the GOT. | |
656 | unsigned int | |
657 | add_constant(Valtype constant) | |
658 | { | |
659 | this->entries_.push_back(Got_entry(constant)); | |
660 | this->set_got_size(); | |
661 | return this->last_got_offset(); | |
662 | } | |
663 | ||
664 | // Write out the GOT table. | |
665 | void | |
666 | do_write(Output_file*); | |
667 | ||
668 | private: | |
669 | // This POD class holds a single GOT entry. | |
670 | class Got_entry | |
671 | { | |
672 | public: | |
673 | // Create a zero entry. | |
674 | Got_entry() | |
675 | : local_sym_index_(CONSTANT_CODE) | |
676 | { this->u_.constant = 0; } | |
677 | ||
678 | // Create a global symbol entry. | |
679 | Got_entry(Symbol* gsym) | |
680 | : local_sym_index_(GSYM_CODE) | |
681 | { this->u_.gsym = gsym; } | |
682 | ||
683 | // Create a local symbol entry. | |
684 | Got_entry(Object* object, unsigned int local_sym_index) | |
685 | : local_sym_index_(local_sym_index) | |
686 | { | |
687 | assert(local_sym_index != GSYM_CODE | |
688 | && local_sym_index != CONSTANT_CODE); | |
689 | this->u_.object = object; | |
690 | } | |
691 | ||
692 | // Create a constant entry. The constant is a host value--it will | |
693 | // be swapped, if necessary, when it is written out. | |
694 | Got_entry(Valtype constant) | |
695 | : local_sym_index_(CONSTANT_CODE) | |
696 | { this->u_.constant = constant; } | |
697 | ||
698 | // Write the GOT entry to an output view. | |
699 | void | |
700 | write(unsigned char* pov) const; | |
701 | ||
702 | private: | |
703 | enum | |
704 | { | |
705 | GSYM_CODE = -1U, | |
706 | CONSTANT_CODE = -2U | |
707 | }; | |
708 | ||
709 | union | |
710 | { | |
711 | // For a local symbol, the object. | |
712 | Object* object; | |
713 | // For a global symbol, the symbol. | |
714 | Symbol* gsym; | |
715 | // For a constant, the constant. | |
716 | Valtype constant; | |
717 | } u_; | |
c06b7b0b ILT |
718 | // For a local symbol, the local symbol index. This is GSYM_CODE |
719 | // for a global symbol, or CONSTANT_CODE for a constant. | |
ead1e424 ILT |
720 | unsigned int local_sym_index_; |
721 | }; | |
722 | ||
723 | typedef std::vector<Got_entry> Got_entries; | |
724 | ||
725 | // Return the offset into the GOT of GOT entry I. | |
726 | unsigned int | |
727 | got_offset(unsigned int i) const | |
728 | { return i * (size / 8); } | |
729 | ||
730 | // Return the offset into the GOT of the last entry added. | |
731 | unsigned int | |
732 | last_got_offset() const | |
733 | { return this->got_offset(this->entries_.size() - 1); } | |
734 | ||
735 | // Set the size of the section. | |
736 | void | |
737 | set_got_size() | |
738 | { this->set_data_size(this->got_offset(this->entries_.size())); } | |
739 | ||
740 | // The list of GOT entries. | |
741 | Got_entries entries_; | |
742 | }; | |
743 | ||
a2fb1b05 ILT |
744 | // An output section. We don't expect to have too many output |
745 | // sections, so we don't bother to do a template on the size. | |
746 | ||
54dc6425 | 747 | class Output_section : public Output_data |
a2fb1b05 ILT |
748 | { |
749 | public: | |
750 | // Create an output section, giving the name, type, and flags. | |
61ba1cf9 | 751 | Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword, |
ead1e424 | 752 | bool may_add_data); |
54dc6425 | 753 | virtual ~Output_section(); |
a2fb1b05 | 754 | |
ead1e424 ILT |
755 | // Add a new input section SHNDX, named NAME, with header SHDR, from |
756 | // object OBJECT. Return the offset within the output section. | |
a2fb1b05 ILT |
757 | template<int size, bool big_endian> |
758 | off_t | |
f6ce93d6 | 759 | add_input_section(Relobj* object, unsigned int shndx, const char *name, |
a2fb1b05 ILT |
760 | const elfcpp::Shdr<size, big_endian>& shdr); |
761 | ||
ead1e424 | 762 | // Add generated data ODATA to this output section. |
c06b7b0b | 763 | void |
ead1e424 ILT |
764 | add_output_section_data(Output_section_data* posd); |
765 | ||
a2fb1b05 ILT |
766 | // Return the section name. |
767 | const char* | |
768 | name() const | |
769 | { return this->name_; } | |
770 | ||
771 | // Return the section type. | |
772 | elfcpp::Elf_Word | |
773 | type() const | |
774 | { return this->type_; } | |
775 | ||
776 | // Return the section flags. | |
777 | elfcpp::Elf_Xword | |
778 | flags() const | |
779 | { return this->flags_; } | |
780 | ||
ead1e424 | 781 | // Return the section index in the output file. |
61ba1cf9 | 782 | unsigned int |
ead1e424 ILT |
783 | do_out_shndx() const |
784 | { return this->out_shndx_; } | |
785 | ||
786 | // Set the output section index. | |
787 | void | |
788 | do_set_out_shndx(unsigned int shndx) | |
789 | { this->out_shndx_ = shndx; } | |
61ba1cf9 ILT |
790 | |
791 | // Set the entsize field. | |
792 | void | |
793 | set_entsize(uint64_t v) | |
794 | { this->entsize_ = v; } | |
795 | ||
796 | // Set the link field. | |
797 | void | |
798 | set_link(unsigned int v) | |
799 | { this->link_ = v; } | |
800 | ||
801 | // Set the info field. | |
802 | void | |
803 | set_info(unsigned int v) | |
804 | { this->info_ = v; } | |
805 | ||
806 | // Set the addralign field. | |
807 | void | |
808 | set_addralign(uint64_t v) | |
809 | { this->addralign_ = v; } | |
810 | ||
c06b7b0b ILT |
811 | // Indicate that we need a symtab index. |
812 | void | |
813 | set_needs_symtab_index() | |
814 | { this->needs_symtab_index_ = true; } | |
815 | ||
816 | // Return whether we need a symtab index. | |
817 | bool | |
818 | needs_symtab_index() const | |
819 | { return this->needs_symtab_index_; } | |
820 | ||
821 | // Get the symtab index. | |
822 | unsigned int | |
823 | symtab_index() const | |
824 | { | |
825 | assert(this->symtab_index_ != 0); | |
826 | return this->symtab_index_; | |
827 | } | |
828 | ||
829 | // Set the symtab index. | |
830 | void | |
831 | set_symtab_index(unsigned int index) | |
832 | { | |
833 | assert(index != 0); | |
834 | this->symtab_index_ = index; | |
835 | } | |
836 | ||
837 | // Indicate that we need a dynsym index. | |
838 | void | |
839 | set_needs_dynsym_index() | |
840 | { this->needs_dynsym_index_ = true; } | |
841 | ||
842 | // Return whether we need a dynsym index. | |
843 | bool | |
844 | needs_dynsym_index() const | |
845 | { return this->needs_dynsym_index_; } | |
846 | ||
847 | // Get the dynsym index. | |
848 | unsigned int | |
849 | dynsym_index() const | |
850 | { | |
851 | assert(this->dynsym_index_ != 0); | |
852 | return this->dynsym_index_; | |
853 | } | |
854 | ||
855 | // Set the dynsym index. | |
856 | void | |
857 | set_dynsym_index(unsigned int index) | |
858 | { | |
859 | assert(index != 0); | |
860 | this->dynsym_index_ = index; | |
861 | } | |
862 | ||
ead1e424 ILT |
863 | // Set the address of the Output_section. For a typical |
864 | // Output_section, there is nothing to do, but if there are any | |
865 | // Output_section_data objects we need to set the final addresses | |
866 | // here. | |
867 | void | |
868 | do_set_address(uint64_t, off_t); | |
869 | ||
54dc6425 | 870 | // Write the data to the file. For a typical Output_section, this |
ead1e424 ILT |
871 | // does nothing: the data is written out by calling Object::Relocate |
872 | // on each input object. But if there are any Output_section_data | |
873 | // objects we do need to write them out here. | |
54dc6425 | 874 | virtual void |
ead1e424 | 875 | do_write(Output_file*); |
54dc6425 | 876 | |
75f65a3e ILT |
877 | // Return the address alignment--function required by parent class. |
878 | uint64_t | |
879 | do_addralign() const | |
880 | { return this->addralign_; } | |
881 | ||
882 | // Return whether this is an Output_section. | |
883 | bool | |
884 | do_is_section() const | |
885 | { return true; } | |
886 | ||
54dc6425 ILT |
887 | // Return whether this is a section of the specified type. |
888 | bool | |
75f65a3e | 889 | do_is_section_type(elfcpp::Elf_Word type) const |
54dc6425 ILT |
890 | { return this->type_ == type; } |
891 | ||
892 | // Return whether the specified section flag is set. | |
893 | bool | |
75f65a3e | 894 | do_is_section_flag_set(elfcpp::Elf_Xword flag) const |
54dc6425 ILT |
895 | { return (this->flags_ & flag) != 0; } |
896 | ||
61ba1cf9 ILT |
897 | // Write the section header into *OPHDR. |
898 | template<int size, bool big_endian> | |
899 | void | |
900 | write_header(const Stringpool*, elfcpp::Shdr_write<size, big_endian>*) const; | |
901 | ||
a2fb1b05 | 902 | private: |
ead1e424 ILT |
903 | // In some cases we need to keep a list of the input sections |
904 | // associated with this output section. We only need the list if we | |
905 | // might have to change the offsets of the input section within the | |
906 | // output section after we add the input section. The ordinary | |
907 | // input sections will be written out when we process the object | |
908 | // file, and as such we don't need to track them here. We do need | |
909 | // to track Output_section_data objects here. We store instances of | |
910 | // this structure in a std::vector, so it must be a POD. There can | |
911 | // be many instances of this structure, so we use a union to save | |
912 | // some space. | |
913 | class Input_section | |
914 | { | |
915 | public: | |
916 | Input_section() | |
917 | : shndx_(0), p2align_(0), data_size_(0) | |
918 | { this->u_.object = NULL; } | |
919 | ||
f6ce93d6 | 920 | Input_section(Relobj* object, unsigned int shndx, off_t data_size, |
ead1e424 ILT |
921 | uint64_t addralign) |
922 | : shndx_(shndx), | |
923 | p2align_(ffsll(static_cast<long long>(addralign))), | |
924 | data_size_(data_size) | |
925 | { | |
926 | assert(shndx != -1U); | |
927 | this->u_.object = object; | |
928 | } | |
929 | ||
930 | Input_section(Output_section_data* posd) | |
931 | : shndx_(-1U), | |
932 | p2align_(ffsll(static_cast<long long>(posd->addralign()))), | |
933 | data_size_(0) | |
934 | { this->u_.posd = posd; } | |
935 | ||
936 | // The required alignment. | |
937 | uint64_t | |
938 | addralign() const | |
939 | { return static_cast<uint64_t>(1) << this->p2align_; } | |
940 | ||
941 | // Return the required size. | |
942 | off_t | |
943 | data_size() const; | |
944 | ||
945 | // Set the address and file offset. This is called during | |
946 | // Layout::finalize. SECOFF is the file offset of the enclosing | |
947 | // section. | |
948 | void | |
949 | set_address(uint64_t addr, off_t off, off_t secoff); | |
950 | ||
951 | // Write out the data. This does nothing for an input section. | |
952 | void | |
953 | write(Output_file*); | |
954 | ||
955 | private: | |
956 | // Whether this is an input section. | |
957 | bool | |
958 | is_input_section() const | |
959 | { return this->shndx_ != -1U; } | |
960 | ||
961 | // For an ordinary input section, this is the section index in | |
962 | // the input file. For an Output_section_data, this is -1U. | |
963 | unsigned int shndx_; | |
964 | // The required alignment, stored as a power of 2. | |
965 | unsigned int p2align_; | |
966 | // For an ordinary input section, the section size. | |
967 | off_t data_size_; | |
968 | union | |
969 | { | |
970 | // If shndx_ != -1U, this points to the object which holds the | |
971 | // input section. | |
f6ce93d6 | 972 | Relobj* object; |
ead1e424 ILT |
973 | // If shndx_ == -1U, this is the data to write out. |
974 | Output_section_data* posd; | |
975 | } u_; | |
976 | }; | |
977 | ||
978 | typedef std::vector<Input_section> Input_section_list; | |
979 | ||
a2fb1b05 ILT |
980 | // Most of these fields are only valid after layout. |
981 | ||
982 | // The name of the section. This will point into a Stringpool. | |
983 | const char* name_; | |
75f65a3e | 984 | // The section address is in the parent class. |
a2fb1b05 ILT |
985 | // The section alignment. |
986 | uint64_t addralign_; | |
987 | // The section entry size. | |
988 | uint64_t entsize_; | |
75f65a3e | 989 | // The file offset is in the parent class. |
a2fb1b05 ILT |
990 | // The section link field. |
991 | unsigned int link_; | |
992 | // The section info field. | |
993 | unsigned int info_; | |
994 | // The section type. | |
995 | elfcpp::Elf_Word type_; | |
996 | // The section flags. | |
997 | elfcpp::Elf_Xword flags_; | |
61ba1cf9 | 998 | // The section index. |
ead1e424 | 999 | unsigned int out_shndx_; |
c06b7b0b ILT |
1000 | // If there is a STT_SECTION for this output section in the normal |
1001 | // symbol table, this is the symbol index. This starts out as zero. | |
1002 | // It is initialized in Layout::finalize() to be the index, or -1U | |
1003 | // if there isn't one. | |
1004 | unsigned int symtab_index_; | |
1005 | // If there is a STT_SECTION for this output section in the dynamic | |
1006 | // symbol table, this is the symbol index. This starts out as zero. | |
1007 | // It is initialized in Layout::finalize() to be the index, or -1U | |
1008 | // if there isn't one. | |
1009 | unsigned int dynsym_index_; | |
ead1e424 ILT |
1010 | // The input sections. This will be empty in cases where we don't |
1011 | // need to keep track of them. | |
1012 | Input_section_list input_sections_; | |
1013 | // The offset of the first entry in input_sections_. | |
1014 | off_t first_input_offset_; | |
1015 | // Whether we permit adding data. | |
c06b7b0b ILT |
1016 | bool may_add_data_ : 1; |
1017 | // Whether this output section needs a STT_SECTION symbol in the | |
1018 | // normal symbol table. This will be true if there is a relocation | |
1019 | // which needs it. | |
1020 | bool needs_symtab_index_ : 1; | |
1021 | // Whether this output section needs a STT_SECTION symbol in the | |
1022 | // dynamic symbol table. This will be true if there is a dynamic | |
1023 | // relocation which needs it. | |
1024 | bool needs_dynsym_index_ : 1; | |
a2fb1b05 ILT |
1025 | }; |
1026 | ||
54dc6425 | 1027 | // A special Output_section which represents the symbol table |
ead1e424 ILT |
1028 | // (SHT_SYMTAB). The actual data is written out by |
1029 | // Symbol_table::write_globals. | |
54dc6425 ILT |
1030 | |
1031 | class Output_section_symtab : public Output_section | |
1032 | { | |
1033 | public: | |
c06b7b0b ILT |
1034 | Output_section_symtab(const char* name, off_t data_size) |
1035 | : Output_section(name, elfcpp::SHT_SYMTAB, 0, false) | |
1036 | { this->set_data_size(data_size); } | |
ead1e424 ILT |
1037 | |
1038 | // The data is written out by Symbol_table::write_globals. We don't | |
1039 | // do anything here. | |
1040 | void | |
1041 | do_write(Output_file*) | |
1042 | { } | |
c06b7b0b ILT |
1043 | }; |
1044 | ||
1045 | // A special Output_section which represents the dynamic symbol table | |
1046 | // (SHT_DYNSYM). The actual data is written out by | |
1047 | // Symbol_table::write_globals. | |
1048 | ||
1049 | class Output_section_dynsym : public Output_section | |
1050 | { | |
1051 | public: | |
1052 | Output_section_dynsym(const char* name, off_t data_size) | |
1053 | : Output_section(name, elfcpp::SHT_DYNSYM, 0, false) | |
1054 | { this->set_data_size(data_size); } | |
ead1e424 | 1055 | |
c06b7b0b ILT |
1056 | // The data is written out by Symbol_table::write_globals. We don't |
1057 | // do anything here. | |
ead1e424 | 1058 | void |
c06b7b0b ILT |
1059 | do_write(Output_file*) |
1060 | { } | |
75f65a3e ILT |
1061 | }; |
1062 | ||
1063 | // A special Output_section which holds a string table. | |
1064 | ||
1065 | class Output_section_strtab : public Output_section | |
1066 | { | |
1067 | public: | |
ead1e424 | 1068 | Output_section_strtab(const char* name, Stringpool* contents); |
75f65a3e ILT |
1069 | |
1070 | // Write out the data. | |
1071 | void | |
1072 | do_write(Output_file*); | |
1073 | ||
1074 | private: | |
1075 | Stringpool* contents_; | |
54dc6425 ILT |
1076 | }; |
1077 | ||
a2fb1b05 ILT |
1078 | // An output segment. PT_LOAD segments are built from collections of |
1079 | // output sections. Other segments typically point within PT_LOAD | |
1080 | // segments, and are built directly as needed. | |
1081 | ||
1082 | class Output_segment | |
1083 | { | |
1084 | public: | |
1085 | // Create an output segment, specifying the type and flags. | |
1086 | Output_segment(elfcpp::Elf_Word, elfcpp::Elf_Word); | |
1087 | ||
1088 | // Return the virtual address. | |
1089 | uint64_t | |
1090 | vaddr() const | |
1091 | { return this->vaddr_; } | |
1092 | ||
1093 | // Return the physical address. | |
1094 | uint64_t | |
1095 | paddr() const | |
1096 | { return this->paddr_; } | |
1097 | ||
1098 | // Return the segment type. | |
1099 | elfcpp::Elf_Word | |
1100 | type() const | |
1101 | { return this->type_; } | |
1102 | ||
1103 | // Return the segment flags. | |
1104 | elfcpp::Elf_Word | |
1105 | flags() const | |
1106 | { return this->flags_; } | |
1107 | ||
92e059d8 ILT |
1108 | // Return the memory size. |
1109 | uint64_t | |
1110 | memsz() const | |
1111 | { return this->memsz_; } | |
1112 | ||
ead1e424 ILT |
1113 | // Return the file size. |
1114 | off_t | |
1115 | filesz() const | |
1116 | { return this->filesz_; } | |
1117 | ||
75f65a3e ILT |
1118 | // Return the maximum alignment of the Output_data. |
1119 | uint64_t | |
ead1e424 | 1120 | addralign(); |
75f65a3e | 1121 | |
a2fb1b05 ILT |
1122 | // Add an Output_section to this segment. |
1123 | void | |
dbe717ef ILT |
1124 | add_output_section(Output_section* os, elfcpp::Elf_Word seg_flags) |
1125 | { this->add_output_section(os, seg_flags, false); } | |
1126 | ||
1127 | // Add an Output_section to the start of this segment. | |
1128 | void | |
1129 | add_initial_output_section(Output_section* os, elfcpp::Elf_Word seg_flags) | |
1130 | { this->add_output_section(os, seg_flags, true); } | |
75f65a3e ILT |
1131 | |
1132 | // Add an Output_data (which is not an Output_section) to the start | |
1133 | // of this segment. | |
1134 | void | |
1135 | add_initial_output_data(Output_data*); | |
1136 | ||
1137 | // Set the address of the segment to ADDR and the offset to *POFF | |
1138 | // (aligned if necessary), and set the addresses and offsets of all | |
ead1e424 ILT |
1139 | // contained output sections accordingly. Set the section indexes |
1140 | // of all contained output sections starting with *PSHNDX. Return | |
1141 | // the address of the immediately following segment. Update *POFF | |
1142 | // and *PSHNDX. This should only be called for a PT_LOAD segment. | |
75f65a3e | 1143 | uint64_t |
ead1e424 | 1144 | set_section_addresses(uint64_t addr, off_t* poff, unsigned int* pshndx); |
75f65a3e ILT |
1145 | |
1146 | // Set the offset of this segment based on the section. This should | |
1147 | // only be called for a non-PT_LOAD segment. | |
1148 | void | |
1149 | set_offset(); | |
1150 | ||
1151 | // Return the number of output sections. | |
1152 | unsigned int | |
1153 | output_section_count() const; | |
a2fb1b05 | 1154 | |
61ba1cf9 ILT |
1155 | // Write the segment header into *OPHDR. |
1156 | template<int size, bool big_endian> | |
1157 | void | |
ead1e424 | 1158 | write_header(elfcpp::Phdr_write<size, big_endian>*); |
61ba1cf9 ILT |
1159 | |
1160 | // Write the section headers of associated sections into V. | |
1161 | template<int size, bool big_endian> | |
1162 | unsigned char* | |
5482377d | 1163 | write_section_headers(const Stringpool*, |
ead1e424 ILT |
1164 | unsigned char* v, |
1165 | unsigned int* pshndx ACCEPT_SIZE_ENDIAN) const; | |
61ba1cf9 | 1166 | |
a2fb1b05 ILT |
1167 | private: |
1168 | Output_segment(const Output_segment&); | |
1169 | Output_segment& operator=(const Output_segment&); | |
1170 | ||
54dc6425 | 1171 | typedef std::list<Output_data*> Output_data_list; |
a2fb1b05 | 1172 | |
dbe717ef ILT |
1173 | // Add an Output_section to this segment, specifying front or back. |
1174 | void | |
1175 | add_output_section(Output_section*, elfcpp::Elf_Word seg_flags, | |
1176 | bool front); | |
1177 | ||
ead1e424 ILT |
1178 | // Find the maximum alignment in an Output_data_list. |
1179 | static uint64_t | |
1180 | maximum_alignment(const Output_data_list*); | |
1181 | ||
75f65a3e ILT |
1182 | // Set the section addresses in an Output_data_list. |
1183 | uint64_t | |
ead1e424 ILT |
1184 | set_section_list_addresses(Output_data_list*, uint64_t addr, off_t* poff, |
1185 | unsigned int* pshndx); | |
75f65a3e ILT |
1186 | |
1187 | // Return the number of Output_sections in an Output_data_list. | |
1188 | unsigned int | |
1189 | output_section_count_list(const Output_data_list*) const; | |
1190 | ||
61ba1cf9 ILT |
1191 | // Write the section headers in the list into V. |
1192 | template<int size, bool big_endian> | |
1193 | unsigned char* | |
1194 | write_section_headers_list(const Stringpool*, const Output_data_list*, | |
ead1e424 ILT |
1195 | unsigned char* v, |
1196 | unsigned int* pshdx ACCEPT_SIZE_ENDIAN) const; | |
61ba1cf9 | 1197 | |
75f65a3e | 1198 | // The list of output data with contents attached to this segment. |
54dc6425 | 1199 | Output_data_list output_data_; |
75f65a3e ILT |
1200 | // The list of output data without contents attached to this segment. |
1201 | Output_data_list output_bss_; | |
a2fb1b05 ILT |
1202 | // The segment virtual address. |
1203 | uint64_t vaddr_; | |
1204 | // The segment physical address. | |
1205 | uint64_t paddr_; | |
1206 | // The size of the segment in memory. | |
1207 | uint64_t memsz_; | |
1208 | // The segment alignment. | |
1209 | uint64_t align_; | |
1210 | // The offset of the segment data within the file. | |
1211 | off_t offset_; | |
1212 | // The size of the segment data in the file. | |
1213 | off_t filesz_; | |
1214 | // The segment type; | |
1215 | elfcpp::Elf_Word type_; | |
1216 | // The segment flags. | |
1217 | elfcpp::Elf_Word flags_; | |
ead1e424 ILT |
1218 | // Whether we have set align_. |
1219 | bool is_align_known_; | |
a2fb1b05 ILT |
1220 | }; |
1221 | ||
61ba1cf9 | 1222 | // This class represents the output file. |
a2fb1b05 ILT |
1223 | |
1224 | class Output_file | |
1225 | { | |
1226 | public: | |
61ba1cf9 ILT |
1227 | Output_file(const General_options& options); |
1228 | ||
1229 | // Open the output file. FILE_SIZE is the final size of the file. | |
1230 | void | |
1231 | open(off_t file_size); | |
1232 | ||
1233 | // Close the output file and make sure there are no error. | |
1234 | void | |
1235 | close(); | |
1236 | ||
1237 | // We currently always use mmap which makes the view handling quite | |
1238 | // simple. In the future we may support other approaches. | |
a2fb1b05 ILT |
1239 | |
1240 | // Write data to the output file. | |
1241 | void | |
61ba1cf9 ILT |
1242 | write(off_t offset, const void* data, off_t len) |
1243 | { memcpy(this->base_ + offset, data, len); } | |
1244 | ||
1245 | // Get a buffer to use to write to the file, given the offset into | |
1246 | // the file and the size. | |
1247 | unsigned char* | |
1248 | get_output_view(off_t start, off_t size) | |
1249 | { | |
1250 | assert(start >= 0 && size >= 0 && start + size <= this->file_size_); | |
1251 | return this->base_ + start; | |
1252 | } | |
1253 | ||
1254 | // VIEW must have been returned by get_output_view. Write the | |
1255 | // buffer to the file, passing in the offset and the size. | |
1256 | void | |
1257 | write_output_view(off_t, off_t, unsigned char*) | |
1258 | { } | |
1259 | ||
1260 | private: | |
1261 | // General options. | |
1262 | const General_options& options_; | |
1263 | // File name. | |
1264 | const char* name_; | |
1265 | // File descriptor. | |
1266 | int o_; | |
1267 | // File size. | |
1268 | off_t file_size_; | |
1269 | // Base of file mapped into memory. | |
1270 | unsigned char* base_; | |
a2fb1b05 ILT |
1271 | }; |
1272 | ||
1273 | } // End namespace gold. | |
1274 | ||
1275 | #endif // !defined(GOLD_OUTPUT_H) |