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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 | ||
6 | #include <list> | |
ead1e424 | 7 | #include <vector> |
a2fb1b05 ILT |
8 | |
9 | #include "elfcpp.h" | |
54dc6425 | 10 | #include "layout.h" |
c06b7b0b | 11 | #include "reloc-types.h" |
a2fb1b05 ILT |
12 | |
13 | namespace gold | |
14 | { | |
15 | ||
61ba1cf9 | 16 | class General_options; |
a2fb1b05 | 17 | class Object; |
a3ad94ed | 18 | class Symbol; |
a2fb1b05 | 19 | class Output_file; |
c06b7b0b | 20 | class Output_section; |
a3ad94ed | 21 | class Target; |
54dc6425 ILT |
22 | template<int size, bool big_endian> |
23 | class Sized_target; | |
c06b7b0b ILT |
24 | template<int size, bool big_endian> |
25 | class Sized_relobj; | |
54dc6425 ILT |
26 | |
27 | // An abtract class for data which has to go into the output file. | |
a2fb1b05 ILT |
28 | |
29 | class Output_data | |
30 | { | |
31 | public: | |
75f65a3e | 32 | explicit Output_data(off_t data_size = 0) |
61ba1cf9 | 33 | : address_(0), data_size_(data_size), offset_(-1) |
a2fb1b05 ILT |
34 | { } |
35 | ||
36 | virtual | |
37 | ~Output_data(); | |
38 | ||
ead1e424 ILT |
39 | // Return the address. This is only valid after Layout::finalize is |
40 | // finished. | |
75f65a3e ILT |
41 | uint64_t |
42 | address() const | |
43 | { return this->address_; } | |
44 | ||
ead1e424 ILT |
45 | // Return the size of the data. This must be valid after |
46 | // Layout::finalize calls set_address, but need not be valid before | |
47 | // then. | |
a2fb1b05 | 48 | off_t |
75f65a3e ILT |
49 | data_size() const |
50 | { return this->data_size_; } | |
51 | ||
ead1e424 ILT |
52 | // Return the file offset. This is only valid after |
53 | // Layout::finalize is finished. | |
75f65a3e ILT |
54 | off_t |
55 | offset() const | |
56 | { return this->offset_; } | |
57 | ||
58 | // Return the required alignment. | |
59 | uint64_t | |
60 | addralign() const | |
61 | { return this->do_addralign(); } | |
62 | ||
63 | // Return whether this is an Output_section. | |
64 | bool | |
65 | is_section() const | |
66 | { return this->do_is_section(); } | |
67 | ||
68 | // Return whether this is an Output_section of the specified type. | |
69 | bool | |
70 | is_section_type(elfcpp::Elf_Word stt) const | |
71 | { return this->do_is_section_type(stt); } | |
72 | ||
73 | // Return whether this is an Output_section with the specified flag | |
74 | // set. | |
75 | bool | |
76 | is_section_flag_set(elfcpp::Elf_Xword shf) const | |
77 | { return this->do_is_section_flag_set(shf); } | |
78 | ||
ead1e424 ILT |
79 | // Return the output section index, if there is an output section. |
80 | unsigned int | |
81 | out_shndx() const | |
82 | { return this->do_out_shndx(); } | |
83 | ||
84 | // Set the output section index, if this is an output section. | |
85 | void | |
86 | set_out_shndx(unsigned int shndx) | |
87 | { this->do_set_out_shndx(shndx); } | |
88 | ||
89 | // Set the address and file offset of this data. This is called | |
90 | // during Layout::finalize. | |
75f65a3e ILT |
91 | void |
92 | set_address(uint64_t addr, off_t off); | |
93 | ||
ead1e424 ILT |
94 | // Write the data to the output file. This is called after |
95 | // Layout::finalize is complete. | |
75f65a3e ILT |
96 | void |
97 | write(Output_file* file) | |
98 | { this->do_write(file); } | |
a2fb1b05 | 99 | |
a3ad94ed ILT |
100 | // This is called by Layout::finalize to note that all sizes must |
101 | // now be fixed. | |
102 | static void | |
103 | layout_complete() | |
104 | { Output_data::sizes_are_fixed = true; } | |
105 | ||
75f65a3e ILT |
106 | protected: |
107 | // Functions that child classes may or in some cases must implement. | |
108 | ||
109 | // Write the data to the output file. | |
a2fb1b05 | 110 | virtual void |
75f65a3e ILT |
111 | do_write(Output_file*) = 0; |
112 | ||
113 | // Return the required alignment. | |
114 | virtual uint64_t | |
115 | do_addralign() const = 0; | |
116 | ||
117 | // Return whether this is an Output_section. | |
118 | virtual bool | |
119 | do_is_section() const | |
120 | { return false; } | |
a2fb1b05 | 121 | |
54dc6425 | 122 | // Return whether this is an Output_section of the specified type. |
75f65a3e | 123 | // This only needs to be implement by Output_section. |
54dc6425 | 124 | virtual bool |
75f65a3e | 125 | do_is_section_type(elfcpp::Elf_Word) const |
54dc6425 ILT |
126 | { return false; } |
127 | ||
75f65a3e ILT |
128 | // Return whether this is an Output_section with the specific flag |
129 | // set. This only needs to be implemented by Output_section. | |
54dc6425 | 130 | virtual bool |
75f65a3e | 131 | do_is_section_flag_set(elfcpp::Elf_Xword) const |
54dc6425 ILT |
132 | { return false; } |
133 | ||
ead1e424 ILT |
134 | // Return the output section index, if there is an output section. |
135 | virtual unsigned int | |
136 | do_out_shndx() const | |
a3ad94ed | 137 | { gold_unreachable(); } |
ead1e424 ILT |
138 | |
139 | // Set the output section index, if this is an output section. | |
140 | virtual void | |
141 | do_set_out_shndx(unsigned int) | |
a3ad94ed | 142 | { gold_unreachable(); } |
ead1e424 | 143 | |
75f65a3e | 144 | // Set the address and file offset of the data. This only needs to |
a3ad94ed ILT |
145 | // be implemented if the child needs to know. The child class can |
146 | // set its size in this call. | |
75f65a3e ILT |
147 | virtual void |
148 | do_set_address(uint64_t, off_t) | |
149 | { } | |
150 | ||
151 | // Functions that child classes may call. | |
152 | ||
a2fb1b05 ILT |
153 | // Set the size of the data. |
154 | void | |
75f65a3e | 155 | set_data_size(off_t data_size) |
a3ad94ed ILT |
156 | { |
157 | gold_assert(!Output_data::sizes_are_fixed); | |
158 | this->data_size_ = data_size; | |
159 | } | |
75f65a3e ILT |
160 | |
161 | // Return default alignment for a size--32 or 64. | |
162 | static uint64_t | |
163 | default_alignment(int size); | |
a2fb1b05 ILT |
164 | |
165 | private: | |
166 | Output_data(const Output_data&); | |
167 | Output_data& operator=(const Output_data&); | |
168 | ||
a3ad94ed ILT |
169 | // This is used for verification, to make sure that we don't try to |
170 | // change any sizes after we set the section addresses. | |
171 | static bool sizes_are_fixed; | |
172 | ||
75f65a3e ILT |
173 | // Memory address in file (not always meaningful). |
174 | uint64_t address_; | |
a2fb1b05 | 175 | // Size of data in file. |
75f65a3e ILT |
176 | off_t data_size_; |
177 | // Offset within file. | |
178 | off_t offset_; | |
a2fb1b05 ILT |
179 | }; |
180 | ||
54dc6425 ILT |
181 | // Output the section headers. |
182 | ||
183 | class Output_section_headers : public Output_data | |
184 | { | |
185 | public: | |
75f65a3e | 186 | Output_section_headers(int size, |
61ba1cf9 | 187 | bool big_endian, |
16649710 ILT |
188 | const Layout*, |
189 | const Layout::Segment_list*, | |
190 | const Layout::Section_list*, | |
61ba1cf9 | 191 | const Stringpool*); |
54dc6425 ILT |
192 | |
193 | // Write the data to the file. | |
194 | void | |
75f65a3e ILT |
195 | do_write(Output_file*); |
196 | ||
197 | // Return the required alignment. | |
198 | uint64_t | |
199 | do_addralign() const | |
200 | { return Output_data::default_alignment(this->size_); } | |
54dc6425 ILT |
201 | |
202 | private: | |
61ba1cf9 ILT |
203 | // Write the data to the file with the right size and endianness. |
204 | template<int size, bool big_endian> | |
205 | void | |
206 | do_sized_write(Output_file*); | |
207 | ||
75f65a3e | 208 | int size_; |
61ba1cf9 | 209 | bool big_endian_; |
16649710 ILT |
210 | const Layout* layout_; |
211 | const Layout::Segment_list* segment_list_; | |
212 | const Layout::Section_list* unattached_section_list_; | |
61ba1cf9 | 213 | const Stringpool* secnamepool_; |
54dc6425 ILT |
214 | }; |
215 | ||
216 | // Output the segment headers. | |
217 | ||
218 | class Output_segment_headers : public Output_data | |
219 | { | |
220 | public: | |
61ba1cf9 ILT |
221 | Output_segment_headers(int size, bool big_endian, |
222 | const Layout::Segment_list& segment_list); | |
54dc6425 ILT |
223 | |
224 | // Write the data to the file. | |
225 | void | |
75f65a3e ILT |
226 | do_write(Output_file*); |
227 | ||
228 | // Return the required alignment. | |
229 | uint64_t | |
230 | do_addralign() const | |
231 | { return Output_data::default_alignment(this->size_); } | |
54dc6425 ILT |
232 | |
233 | private: | |
61ba1cf9 ILT |
234 | // Write the data to the file with the right size and endianness. |
235 | template<int size, bool big_endian> | |
236 | void | |
237 | do_sized_write(Output_file*); | |
238 | ||
75f65a3e | 239 | int size_; |
61ba1cf9 | 240 | bool big_endian_; |
54dc6425 ILT |
241 | const Layout::Segment_list& segment_list_; |
242 | }; | |
243 | ||
244 | // Output the ELF file header. | |
245 | ||
246 | class Output_file_header : public Output_data | |
247 | { | |
248 | public: | |
75f65a3e | 249 | Output_file_header(int size, |
61ba1cf9 | 250 | bool big_endian, |
75f65a3e | 251 | const General_options&, |
54dc6425 ILT |
252 | const Target*, |
253 | const Symbol_table*, | |
75f65a3e ILT |
254 | const Output_segment_headers*); |
255 | ||
256 | // Add information about the section headers. We lay out the ELF | |
257 | // file header before we create the section headers. | |
258 | void set_section_info(const Output_section_headers*, | |
259 | const Output_section* shstrtab); | |
54dc6425 ILT |
260 | |
261 | // Write the data to the file. | |
262 | void | |
75f65a3e ILT |
263 | do_write(Output_file*); |
264 | ||
265 | // Return the required alignment. | |
266 | uint64_t | |
267 | do_addralign() const | |
268 | { return Output_data::default_alignment(this->size_); } | |
269 | ||
270 | // Set the address and offset--we only implement this for error | |
271 | // checking. | |
272 | void | |
273 | do_set_address(uint64_t, off_t off) const | |
a3ad94ed | 274 | { gold_assert(off == 0); } |
54dc6425 ILT |
275 | |
276 | private: | |
61ba1cf9 ILT |
277 | // Write the data to the file with the right size and endianness. |
278 | template<int size, bool big_endian> | |
279 | void | |
280 | do_sized_write(Output_file*); | |
281 | ||
75f65a3e | 282 | int size_; |
61ba1cf9 | 283 | bool big_endian_; |
54dc6425 ILT |
284 | const General_options& options_; |
285 | const Target* target_; | |
286 | const Symbol_table* symtab_; | |
61ba1cf9 | 287 | const Output_segment_headers* segment_header_; |
54dc6425 ILT |
288 | const Output_section_headers* section_header_; |
289 | const Output_section* shstrtab_; | |
290 | }; | |
291 | ||
ead1e424 ILT |
292 | // Output sections are mainly comprised of input sections. However, |
293 | // there are cases where we have data to write out which is not in an | |
294 | // input section. Output_section_data is used in such cases. This is | |
295 | // an abstract base class. | |
296 | ||
297 | class Output_section_data : public Output_data | |
298 | { | |
299 | public: | |
300 | Output_section_data(off_t data_size, uint64_t addralign) | |
301 | : Output_data(data_size), output_section_(NULL), addralign_(addralign) | |
302 | { } | |
303 | ||
304 | Output_section_data(uint64_t addralign) | |
305 | : Output_data(0), output_section_(NULL), addralign_(addralign) | |
306 | { } | |
307 | ||
16649710 ILT |
308 | // Return the output section. |
309 | const Output_section* | |
310 | output_section() const | |
311 | { return this->output_section_; } | |
312 | ||
ead1e424 ILT |
313 | // Record the output section. |
314 | void | |
16649710 | 315 | set_output_section(Output_section* os); |
ead1e424 | 316 | |
b8e6aad9 ILT |
317 | // Add an input section, for SHF_MERGE sections. This returns true |
318 | // if the section was handled. | |
319 | bool | |
320 | add_input_section(Relobj* object, unsigned int shndx) | |
321 | { return this->do_add_input_section(object, shndx); } | |
322 | ||
323 | // Given an input OBJECT, an input section index SHNDX within that | |
324 | // object, and an OFFSET relative to the start of that input | |
325 | // section, return whether or not the output address is known. | |
326 | // OUTPUT_SECTION_ADDRESS is the address of the output section which | |
327 | // this is a part of. If this function returns true, it sets | |
328 | // *POUTPUT to the output address. | |
329 | virtual bool | |
330 | output_address(const Relobj* object, unsigned int shndx, off_t offset, | |
331 | uint64_t output_section_address, uint64_t *poutput) const | |
332 | { | |
333 | return this->do_output_address(object, shndx, offset, | |
334 | output_section_address, poutput); | |
335 | } | |
336 | ||
ead1e424 ILT |
337 | protected: |
338 | // The child class must implement do_write. | |
339 | ||
16649710 ILT |
340 | // The child class may implement specific adjustments to the output |
341 | // section. | |
342 | virtual void | |
343 | do_adjust_output_section(Output_section*) | |
344 | { } | |
345 | ||
b8e6aad9 ILT |
346 | // May be implemented by child class. Return true if the section |
347 | // was handled. | |
348 | virtual bool | |
349 | do_add_input_section(Relobj*, unsigned int) | |
350 | { gold_unreachable(); } | |
351 | ||
352 | // The child class may implement output_address. | |
353 | virtual bool | |
354 | do_output_address(const Relobj*, unsigned int, off_t, uint64_t, | |
355 | uint64_t*) const | |
356 | { return false; } | |
357 | ||
ead1e424 ILT |
358 | // Return the required alignment. |
359 | uint64_t | |
360 | do_addralign() const | |
361 | { return this->addralign_; } | |
362 | ||
363 | // Return the section index of the output section. | |
364 | unsigned int | |
365 | do_out_shndx() const; | |
366 | ||
5a6f7e2d ILT |
367 | // Set the alignment. |
368 | void | |
369 | set_addralign(uint64_t addralign) | |
370 | { this->addralign_ = addralign; } | |
371 | ||
ead1e424 ILT |
372 | private: |
373 | // The output section for this section. | |
374 | const Output_section* output_section_; | |
375 | // The required alignment. | |
376 | uint64_t addralign_; | |
377 | }; | |
378 | ||
dbe717ef ILT |
379 | // A simple case of Output_data in which we have constant data to |
380 | // output. | |
ead1e424 | 381 | |
dbe717ef | 382 | class Output_data_const : public Output_section_data |
ead1e424 ILT |
383 | { |
384 | public: | |
dbe717ef ILT |
385 | Output_data_const(const std::string& data, uint64_t addralign) |
386 | : Output_section_data(data.size(), addralign), data_(data) | |
387 | { } | |
388 | ||
389 | Output_data_const(const char* p, off_t len, uint64_t addralign) | |
390 | : Output_section_data(len, addralign), data_(p, len) | |
391 | { } | |
392 | ||
393 | Output_data_const(const unsigned char* p, off_t len, uint64_t addralign) | |
394 | : Output_section_data(len, addralign), | |
395 | data_(reinterpret_cast<const char*>(p), len) | |
396 | { } | |
397 | ||
a3ad94ed ILT |
398 | // Add more data. |
399 | void | |
400 | add_data(const std::string& add) | |
401 | { | |
402 | this->data_.append(add); | |
403 | this->set_data_size(this->data_.size()); | |
404 | } | |
405 | ||
406 | // Write the data to the output file. | |
dbe717ef | 407 | void |
a3ad94ed | 408 | do_write(Output_file*); |
dbe717ef ILT |
409 | |
410 | private: | |
411 | std::string data_; | |
412 | }; | |
413 | ||
a3ad94ed ILT |
414 | // Another version of Output_data with constant data, in which the |
415 | // buffer is allocated by the caller. | |
dbe717ef | 416 | |
a3ad94ed | 417 | class Output_data_const_buffer : public Output_section_data |
dbe717ef ILT |
418 | { |
419 | public: | |
a3ad94ed ILT |
420 | Output_data_const_buffer(const unsigned char* p, off_t len, |
421 | uint64_t addralign) | |
422 | : Output_section_data(len, addralign), p_(p) | |
423 | { } | |
424 | ||
425 | // Write the data the output file. | |
426 | void | |
427 | do_write(Output_file*); | |
428 | ||
429 | private: | |
430 | const unsigned char* p_; | |
431 | }; | |
432 | ||
433 | // A place holder for data written out via some other mechanism. | |
434 | ||
435 | class Output_data_space : public Output_section_data | |
436 | { | |
437 | public: | |
438 | Output_data_space(off_t data_size, uint64_t addralign) | |
439 | : Output_section_data(data_size, addralign) | |
440 | { } | |
441 | ||
442 | explicit Output_data_space(uint64_t addralign) | |
ead1e424 ILT |
443 | : Output_section_data(addralign) |
444 | { } | |
445 | ||
446 | // Set the size. | |
447 | void | |
a3ad94ed ILT |
448 | set_space_size(off_t space_size) |
449 | { this->set_data_size(space_size); } | |
ead1e424 | 450 | |
5a6f7e2d ILT |
451 | // Set the alignment. |
452 | void | |
453 | set_space_alignment(uint64_t align) | |
454 | { this->set_addralign(align); } | |
455 | ||
a3ad94ed | 456 | // Write out the data--this must be handled elsewhere. |
ead1e424 ILT |
457 | void |
458 | do_write(Output_file*) | |
459 | { } | |
460 | }; | |
461 | ||
a3ad94ed ILT |
462 | // A string table which goes into an output section. |
463 | ||
464 | class Output_data_strtab : public Output_section_data | |
465 | { | |
466 | public: | |
467 | Output_data_strtab(Stringpool* strtab) | |
468 | : Output_section_data(1), strtab_(strtab) | |
469 | { } | |
470 | ||
471 | // This is called to set the address and file offset. Here we make | |
472 | // sure that the Stringpool is finalized. | |
473 | void | |
474 | do_set_address(uint64_t, off_t); | |
475 | ||
476 | // Write out the data. | |
477 | void | |
478 | do_write(Output_file*); | |
479 | ||
480 | private: | |
481 | Stringpool* strtab_; | |
482 | }; | |
483 | ||
c06b7b0b ILT |
484 | // This POD class is used to represent a single reloc in the output |
485 | // file. This could be a private class within Output_data_reloc, but | |
486 | // the templatization is complex enough that I broke it out into a | |
487 | // separate class. The class is templatized on either elfcpp::SHT_REL | |
488 | // or elfcpp::SHT_RELA, and also on whether this is a dynamic | |
489 | // relocation or an ordinary relocation. | |
490 | ||
491 | // A relocation can be against a global symbol, a local symbol, an | |
492 | // output section, or the undefined symbol at index 0. We represent | |
493 | // the latter by using a NULL global symbol. | |
494 | ||
495 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
496 | class Output_reloc; | |
497 | ||
498 | template<bool dynamic, int size, bool big_endian> | |
499 | class Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> | |
500 | { | |
501 | public: | |
502 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
503 | ||
504 | // An uninitialized entry. We need this because we want to put | |
505 | // instances of this class into an STL container. | |
506 | Output_reloc() | |
507 | : local_sym_index_(INVALID_CODE) | |
508 | { } | |
509 | ||
510 | // A reloc against a global symbol. | |
5a6f7e2d | 511 | |
a3ad94ed ILT |
512 | Output_reloc(Symbol* gsym, unsigned int type, Output_data* od, |
513 | Address address) | |
5a6f7e2d ILT |
514 | : address_(address), local_sym_index_(GSYM_CODE), type_(type), |
515 | shndx_(INVALID_CODE) | |
516 | { | |
517 | this->u1_.gsym = gsym; | |
518 | this->u2_.od = od; | |
519 | } | |
520 | ||
521 | Output_reloc(Symbol* gsym, unsigned int type, Relobj* relobj, | |
522 | unsigned int shndx, Address address) | |
523 | : address_(address), local_sym_index_(GSYM_CODE), type_(type), | |
524 | shndx_(shndx) | |
525 | { | |
526 | gold_assert(shndx != INVALID_CODE); | |
527 | this->u1_.gsym = gsym; | |
528 | this->u2_.relobj = relobj; | |
529 | } | |
c06b7b0b ILT |
530 | |
531 | // A reloc against a local symbol. | |
5a6f7e2d ILT |
532 | |
533 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
c06b7b0b | 534 | unsigned int local_sym_index, |
a3ad94ed ILT |
535 | unsigned int type, |
536 | Output_data* od, | |
537 | Address address) | |
5a6f7e2d ILT |
538 | : address_(address), local_sym_index_(local_sym_index), type_(type), |
539 | shndx_(INVALID_CODE) | |
c06b7b0b | 540 | { |
a3ad94ed ILT |
541 | gold_assert(local_sym_index != GSYM_CODE |
542 | && local_sym_index != INVALID_CODE); | |
5a6f7e2d ILT |
543 | this->u1_.relobj = relobj; |
544 | this->u2_.od = od; | |
545 | } | |
546 | ||
547 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
548 | unsigned int local_sym_index, | |
549 | unsigned int type, | |
550 | unsigned int shndx, | |
551 | Address address) | |
552 | : address_(address), local_sym_index_(local_sym_index), type_(type), | |
553 | shndx_(shndx) | |
554 | { | |
555 | gold_assert(local_sym_index != GSYM_CODE | |
556 | && local_sym_index != INVALID_CODE); | |
557 | gold_assert(shndx != INVALID_CODE); | |
558 | this->u1_.relobj = relobj; | |
559 | this->u2_.relobj = relobj; | |
c06b7b0b ILT |
560 | } |
561 | ||
562 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 563 | |
a3ad94ed ILT |
564 | Output_reloc(Output_section* os, unsigned int type, Output_data* od, |
565 | Address address) | |
5a6f7e2d ILT |
566 | : address_(address), local_sym_index_(SECTION_CODE), type_(type), |
567 | shndx_(INVALID_CODE) | |
568 | { | |
569 | this->u1_.os = os; | |
570 | this->u2_.od = od; | |
571 | } | |
572 | ||
573 | Output_reloc(Output_section* os, unsigned int type, Relobj* relobj, | |
574 | unsigned int shndx, Address address) | |
575 | : address_(address), local_sym_index_(SECTION_CODE), type_(type), | |
576 | shndx_(shndx) | |
577 | { | |
578 | gold_assert(shndx != INVALID_CODE); | |
579 | this->u1_.os = os; | |
580 | this->u2_.relobj = relobj; | |
581 | } | |
c06b7b0b ILT |
582 | |
583 | // Write the reloc entry to an output view. | |
584 | void | |
585 | write(unsigned char* pov) const; | |
586 | ||
587 | // Write the offset and info fields to Write_rel. | |
588 | template<typename Write_rel> | |
589 | void write_rel(Write_rel*) const; | |
590 | ||
591 | private: | |
592 | // Return the symbol index. We can't do a double template | |
593 | // specialization, so we do a secondary template here. | |
594 | unsigned int | |
595 | get_symbol_index() const; | |
596 | ||
597 | // Codes for local_sym_index_. | |
598 | enum | |
599 | { | |
600 | // Global symbol. | |
601 | GSYM_CODE = -1U, | |
602 | // Output section. | |
603 | SECTION_CODE = -2U, | |
604 | // Invalid uninitialized entry. | |
605 | INVALID_CODE = -3U | |
606 | }; | |
607 | ||
608 | union | |
609 | { | |
610 | // For a local symbol, the object. We will never generate a | |
611 | // relocation against a local symbol in a dynamic object; that | |
612 | // doesn't make sense. And our callers will always be | |
613 | // templatized, so we use Sized_relobj here. | |
5a6f7e2d | 614 | Sized_relobj<size, big_endian>* relobj; |
c06b7b0b ILT |
615 | // For a global symbol, the symbol. If this is NULL, it indicates |
616 | // a relocation against the undefined 0 symbol. | |
617 | Symbol* gsym; | |
618 | // For a relocation against an output section, the output section. | |
619 | Output_section* os; | |
5a6f7e2d ILT |
620 | } u1_; |
621 | union | |
622 | { | |
623 | // If shndx_ is not INVALID CODE, the object which holds the input | |
624 | // section being used to specify the reloc address. | |
625 | Relobj* relobj; | |
626 | // If shndx_ is INVALID_CODE, the output data being used to | |
627 | // specify the reloc address. This may be NULL if the reloc | |
628 | // address is absolute. | |
629 | Output_data* od; | |
630 | } u2_; | |
631 | // The address offset within the input section or the Output_data. | |
632 | Address address_; | |
c06b7b0b ILT |
633 | // For a local symbol, the local symbol index. This is GSYM_CODE |
634 | // for a global symbol, or INVALID_CODE for an uninitialized value. | |
635 | unsigned int local_sym_index_; | |
a3ad94ed | 636 | // The reloc type--a processor specific code. |
c06b7b0b | 637 | unsigned int type_; |
5a6f7e2d ILT |
638 | // If the reloc address is an input section in an object, the |
639 | // section index. This is INVALID_CODE if the reloc address is | |
640 | // specified in some other way. | |
641 | unsigned int shndx_; | |
c06b7b0b ILT |
642 | }; |
643 | ||
644 | // The SHT_RELA version of Output_reloc<>. This is just derived from | |
645 | // the SHT_REL version of Output_reloc, but it adds an addend. | |
646 | ||
647 | template<bool dynamic, int size, bool big_endian> | |
648 | class Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
649 | { | |
650 | public: | |
651 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
652 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend; | |
653 | ||
654 | // An uninitialized entry. | |
655 | Output_reloc() | |
656 | : rel_() | |
657 | { } | |
658 | ||
659 | // A reloc against a global symbol. | |
5a6f7e2d | 660 | |
a3ad94ed ILT |
661 | Output_reloc(Symbol* gsym, unsigned int type, Output_data* od, |
662 | Address address, Addend addend) | |
663 | : rel_(gsym, type, od, address), addend_(addend) | |
c06b7b0b ILT |
664 | { } |
665 | ||
5a6f7e2d ILT |
666 | Output_reloc(Symbol* gsym, unsigned int type, Relobj* relobj, |
667 | unsigned int shndx, Address address, Addend addend) | |
668 | : rel_(gsym, type, relobj, shndx, address), addend_(addend) | |
669 | { } | |
670 | ||
c06b7b0b | 671 | // A reloc against a local symbol. |
5a6f7e2d ILT |
672 | |
673 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
c06b7b0b | 674 | unsigned int local_sym_index, |
a3ad94ed ILT |
675 | unsigned int type, Output_data* od, Address address, |
676 | Addend addend) | |
5a6f7e2d ILT |
677 | : rel_(relobj, local_sym_index, type, od, address), addend_(addend) |
678 | { } | |
679 | ||
680 | Output_reloc(Sized_relobj<size, big_endian>* relobj, | |
681 | unsigned int local_sym_index, | |
682 | unsigned int type, | |
683 | unsigned int shndx, | |
684 | Address address, | |
685 | Addend addend) | |
686 | : rel_(relobj, local_sym_index, type, shndx, address), | |
687 | addend_(addend) | |
c06b7b0b ILT |
688 | { } |
689 | ||
690 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 691 | |
a3ad94ed ILT |
692 | Output_reloc(Output_section* os, unsigned int type, Output_data* od, |
693 | Address address, Addend addend) | |
694 | : rel_(os, type, od, address), addend_(addend) | |
c06b7b0b ILT |
695 | { } |
696 | ||
5a6f7e2d ILT |
697 | Output_reloc(Output_section* os, unsigned int type, Relobj* relobj, |
698 | unsigned int shndx, Address address, Addend addend) | |
699 | : rel_(os, type, relobj, shndx, address), addend_(addend) | |
700 | { } | |
701 | ||
c06b7b0b ILT |
702 | // Write the reloc entry to an output view. |
703 | void | |
704 | write(unsigned char* pov) const; | |
705 | ||
706 | private: | |
707 | // The basic reloc. | |
708 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> rel_; | |
709 | // The addend. | |
710 | Addend addend_; | |
711 | }; | |
712 | ||
713 | // Output_data_reloc is used to manage a section containing relocs. | |
714 | // SH_TYPE is either elfcpp::SHT_REL or elfcpp::SHT_RELA. DYNAMIC | |
715 | // indicates whether this is a dynamic relocation or a normal | |
716 | // relocation. Output_data_reloc_base is a base class. | |
717 | // Output_data_reloc is the real class, which we specialize based on | |
718 | // the reloc type. | |
719 | ||
720 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
721 | class Output_data_reloc_base : public Output_section_data | |
722 | { | |
723 | public: | |
724 | typedef Output_reloc<sh_type, dynamic, size, big_endian> Output_reloc_type; | |
725 | typedef typename Output_reloc_type::Address Address; | |
726 | static const int reloc_size = | |
727 | Reloc_types<sh_type, size, big_endian>::reloc_size; | |
728 | ||
729 | // Construct the section. | |
730 | Output_data_reloc_base() | |
731 | : Output_section_data(Output_data::default_alignment(size)) | |
732 | { } | |
733 | ||
734 | // Write out the data. | |
735 | void | |
736 | do_write(Output_file*); | |
737 | ||
738 | protected: | |
16649710 ILT |
739 | // Set the entry size and the link. |
740 | void | |
741 | do_adjust_output_section(Output_section *os); | |
742 | ||
c06b7b0b ILT |
743 | // Add a relocation entry. |
744 | void | |
745 | add(const Output_reloc_type& reloc) | |
746 | { | |
747 | this->relocs_.push_back(reloc); | |
748 | this->set_data_size(this->relocs_.size() * reloc_size); | |
749 | } | |
750 | ||
751 | private: | |
752 | typedef std::vector<Output_reloc_type> Relocs; | |
753 | ||
754 | Relocs relocs_; | |
755 | }; | |
756 | ||
757 | // The class which callers actually create. | |
758 | ||
759 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
760 | class Output_data_reloc; | |
761 | ||
762 | // The SHT_REL version of Output_data_reloc. | |
763 | ||
764 | template<bool dynamic, int size, bool big_endian> | |
765 | class Output_data_reloc<elfcpp::SHT_REL, dynamic, size, big_endian> | |
766 | : public Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian> | |
767 | { | |
768 | private: | |
769 | typedef Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, | |
770 | big_endian> Base; | |
771 | ||
772 | public: | |
773 | typedef typename Base::Output_reloc_type Output_reloc_type; | |
774 | typedef typename Output_reloc_type::Address Address; | |
775 | ||
776 | Output_data_reloc() | |
777 | : Output_data_reloc_base<elfcpp::SHT_REL, dynamic, size, big_endian>() | |
778 | { } | |
779 | ||
780 | // Add a reloc against a global symbol. | |
5a6f7e2d | 781 | |
c06b7b0b | 782 | void |
a3ad94ed ILT |
783 | add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address) |
784 | { this->add(Output_reloc_type(gsym, type, od, address)); } | |
c06b7b0b | 785 | |
5a6f7e2d ILT |
786 | void |
787 | add_global(Symbol* gsym, unsigned int type, Relobj* relobj, | |
788 | unsigned int shndx, Address address) | |
789 | { this->add(Output_reloc_type(gsym, type, relobj, shndx, address)); } | |
790 | ||
c06b7b0b | 791 | // Add a reloc against a local symbol. |
5a6f7e2d | 792 | |
c06b7b0b | 793 | void |
5a6f7e2d | 794 | add_local(Sized_relobj<size, big_endian>* relobj, |
a3ad94ed ILT |
795 | unsigned int local_sym_index, unsigned int type, |
796 | Output_data* od, Address address) | |
5a6f7e2d ILT |
797 | { this->add(Output_reloc_type(relobj, local_sym_index, type, od, address)); } |
798 | ||
799 | void | |
800 | add_local(Sized_relobj<size, big_endian>* relobj, | |
801 | unsigned int local_sym_index, unsigned int type, | |
802 | unsigned int shndx, Address address) | |
803 | { this->add(Output_reloc_type(relobj, local_sym_index, type, shndx, | |
804 | address)); } | |
805 | ||
c06b7b0b ILT |
806 | |
807 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 808 | |
c06b7b0b | 809 | void |
a3ad94ed ILT |
810 | add_output_section(Output_section* os, unsigned int type, |
811 | Output_data* od, Address address) | |
812 | { this->add(Output_reloc_type(os, type, od, address)); } | |
5a6f7e2d ILT |
813 | |
814 | void | |
815 | add_output_section(Output_section* os, unsigned int type, | |
816 | Relobj* relobj, unsigned int shndx, Address address) | |
817 | { this->add(Output_reloc_type(os, type, relobj, shndx, address)); } | |
c06b7b0b ILT |
818 | }; |
819 | ||
820 | // The SHT_RELA version of Output_data_reloc. | |
821 | ||
822 | template<bool dynamic, int size, bool big_endian> | |
823 | class Output_data_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
824 | : public Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian> | |
825 | { | |
826 | private: | |
827 | typedef Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, | |
828 | big_endian> Base; | |
829 | ||
830 | public: | |
831 | typedef typename Base::Output_reloc_type Output_reloc_type; | |
832 | typedef typename Output_reloc_type::Address Address; | |
833 | typedef typename Output_reloc_type::Addend Addend; | |
834 | ||
835 | Output_data_reloc() | |
836 | : Output_data_reloc_base<elfcpp::SHT_RELA, dynamic, size, big_endian>() | |
837 | { } | |
838 | ||
839 | // Add a reloc against a global symbol. | |
5a6f7e2d | 840 | |
c06b7b0b | 841 | void |
a3ad94ed ILT |
842 | add_global(Symbol* gsym, unsigned int type, Output_data* od, |
843 | Address address, Addend addend) | |
844 | { this->add(Output_reloc_type(gsym, type, od, address, addend)); } | |
c06b7b0b | 845 | |
5a6f7e2d ILT |
846 | void |
847 | add_global(Symbol* gsym, unsigned int type, Relobj* relobj, | |
848 | unsigned int shndx, Address address, Addend addend) | |
849 | { this->add(Output_reloc_type(gsym, type, relobj, shndx, address, addend)); } | |
850 | ||
c06b7b0b | 851 | // Add a reloc against a local symbol. |
5a6f7e2d | 852 | |
c06b7b0b | 853 | void |
5a6f7e2d | 854 | add_local(Sized_relobj<size, big_endian>* relobj, |
c06b7b0b | 855 | unsigned int local_sym_index, unsigned int type, |
a3ad94ed | 856 | Output_data* od, Address address, Addend addend) |
c06b7b0b | 857 | { |
5a6f7e2d ILT |
858 | this->add(Output_reloc_type(relobj, local_sym_index, type, od, address, |
859 | addend)); | |
860 | } | |
861 | ||
862 | void | |
863 | add_local(Sized_relobj<size, big_endian>* relobj, | |
864 | unsigned int local_sym_index, unsigned int type, | |
865 | unsigned int shndx, Address address, Addend addend) | |
866 | { | |
867 | this->add(Output_reloc_type(relobj, local_sym_index, type, shndx, address, | |
c06b7b0b ILT |
868 | addend)); |
869 | } | |
870 | ||
871 | // A reloc against the STT_SECTION symbol of an output section. | |
5a6f7e2d | 872 | |
c06b7b0b | 873 | void |
a3ad94ed ILT |
874 | add_output_section(Output_section* os, unsigned int type, Output_data* od, |
875 | Address address, Addend addend) | |
876 | { this->add(Output_reloc_type(os, type, od, address, addend)); } | |
5a6f7e2d ILT |
877 | |
878 | void | |
879 | add_output_section(Output_section* os, unsigned int type, Relobj* relobj, | |
880 | unsigned int shndx, Address address, Addend addend) | |
881 | { this->add(Output_reloc_type(os, type, relobj, shndx, address, addend)); } | |
c06b7b0b ILT |
882 | }; |
883 | ||
dbe717ef ILT |
884 | // Output_data_got is used to manage a GOT. Each entry in the GOT is |
885 | // for one symbol--either a global symbol or a local symbol in an | |
ead1e424 | 886 | // object. The target specific code adds entries to the GOT as |
dbe717ef | 887 | // needed. |
ead1e424 ILT |
888 | |
889 | template<int size, bool big_endian> | |
dbe717ef | 890 | class Output_data_got : public Output_section_data |
ead1e424 ILT |
891 | { |
892 | public: | |
893 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
894 | ||
a3ad94ed | 895 | Output_data_got(const General_options* options) |
ead1e424 | 896 | : Output_section_data(Output_data::default_alignment(size)), |
a3ad94ed | 897 | options_(options), entries_() |
ead1e424 ILT |
898 | { } |
899 | ||
dbe717ef ILT |
900 | // Add an entry for a global symbol to the GOT. Return true if this |
901 | // is a new GOT entry, false if the symbol was already in the GOT. | |
902 | bool | |
903 | add_global(Symbol* gsym); | |
ead1e424 ILT |
904 | |
905 | // Add an entry for a local symbol to the GOT. This returns the | |
906 | // offset of the new entry from the start of the GOT. | |
907 | unsigned int | |
908 | add_local(Object* object, unsigned int sym_index) | |
909 | { | |
910 | this->entries_.push_back(Got_entry(object, sym_index)); | |
911 | this->set_got_size(); | |
912 | return this->last_got_offset(); | |
913 | } | |
914 | ||
915 | // Add a constant to the GOT. This returns the offset of the new | |
916 | // entry from the start of the GOT. | |
917 | unsigned int | |
918 | add_constant(Valtype constant) | |
919 | { | |
920 | this->entries_.push_back(Got_entry(constant)); | |
921 | this->set_got_size(); | |
922 | return this->last_got_offset(); | |
923 | } | |
924 | ||
925 | // Write out the GOT table. | |
926 | void | |
927 | do_write(Output_file*); | |
928 | ||
929 | private: | |
930 | // This POD class holds a single GOT entry. | |
931 | class Got_entry | |
932 | { | |
933 | public: | |
934 | // Create a zero entry. | |
935 | Got_entry() | |
936 | : local_sym_index_(CONSTANT_CODE) | |
937 | { this->u_.constant = 0; } | |
938 | ||
939 | // Create a global symbol entry. | |
a3ad94ed | 940 | explicit Got_entry(Symbol* gsym) |
ead1e424 ILT |
941 | : local_sym_index_(GSYM_CODE) |
942 | { this->u_.gsym = gsym; } | |
943 | ||
944 | // Create a local symbol entry. | |
945 | Got_entry(Object* object, unsigned int local_sym_index) | |
946 | : local_sym_index_(local_sym_index) | |
947 | { | |
a3ad94ed ILT |
948 | gold_assert(local_sym_index != GSYM_CODE |
949 | && local_sym_index != CONSTANT_CODE); | |
ead1e424 ILT |
950 | this->u_.object = object; |
951 | } | |
952 | ||
953 | // Create a constant entry. The constant is a host value--it will | |
954 | // be swapped, if necessary, when it is written out. | |
a3ad94ed | 955 | explicit Got_entry(Valtype constant) |
ead1e424 ILT |
956 | : local_sym_index_(CONSTANT_CODE) |
957 | { this->u_.constant = constant; } | |
958 | ||
959 | // Write the GOT entry to an output view. | |
960 | void | |
a3ad94ed | 961 | write(const General_options*, unsigned char* pov) const; |
ead1e424 ILT |
962 | |
963 | private: | |
964 | enum | |
965 | { | |
966 | GSYM_CODE = -1U, | |
967 | CONSTANT_CODE = -2U | |
968 | }; | |
969 | ||
970 | union | |
971 | { | |
972 | // For a local symbol, the object. | |
973 | Object* object; | |
974 | // For a global symbol, the symbol. | |
975 | Symbol* gsym; | |
976 | // For a constant, the constant. | |
977 | Valtype constant; | |
978 | } u_; | |
c06b7b0b ILT |
979 | // For a local symbol, the local symbol index. This is GSYM_CODE |
980 | // for a global symbol, or CONSTANT_CODE for a constant. | |
ead1e424 ILT |
981 | unsigned int local_sym_index_; |
982 | }; | |
983 | ||
984 | typedef std::vector<Got_entry> Got_entries; | |
985 | ||
986 | // Return the offset into the GOT of GOT entry I. | |
987 | unsigned int | |
988 | got_offset(unsigned int i) const | |
989 | { return i * (size / 8); } | |
990 | ||
991 | // Return the offset into the GOT of the last entry added. | |
992 | unsigned int | |
993 | last_got_offset() const | |
994 | { return this->got_offset(this->entries_.size() - 1); } | |
995 | ||
996 | // Set the size of the section. | |
997 | void | |
998 | set_got_size() | |
999 | { this->set_data_size(this->got_offset(this->entries_.size())); } | |
1000 | ||
a3ad94ed ILT |
1001 | // Options. |
1002 | const General_options* options_; | |
ead1e424 ILT |
1003 | // The list of GOT entries. |
1004 | Got_entries entries_; | |
1005 | }; | |
1006 | ||
a3ad94ed ILT |
1007 | // Output_data_dynamic is used to hold the data in SHT_DYNAMIC |
1008 | // section. | |
1009 | ||
1010 | class Output_data_dynamic : public Output_section_data | |
1011 | { | |
1012 | public: | |
1013 | Output_data_dynamic(const Target* target, Stringpool* pool) | |
1014 | : Output_section_data(Output_data::default_alignment(target->get_size())), | |
1015 | target_(target), entries_(), pool_(pool) | |
1016 | { } | |
1017 | ||
1018 | // Add a new dynamic entry with a fixed numeric value. | |
1019 | void | |
1020 | add_constant(elfcpp::DT tag, unsigned int val) | |
1021 | { this->add_entry(Dynamic_entry(tag, val)); } | |
1022 | ||
16649710 | 1023 | // Add a new dynamic entry with the address of output data. |
a3ad94ed | 1024 | void |
16649710 ILT |
1025 | add_section_address(elfcpp::DT tag, const Output_data* od) |
1026 | { this->add_entry(Dynamic_entry(tag, od, false)); } | |
a3ad94ed | 1027 | |
16649710 | 1028 | // Add a new dynamic entry with the size of output data. |
a3ad94ed | 1029 | void |
16649710 ILT |
1030 | add_section_size(elfcpp::DT tag, const Output_data* od) |
1031 | { this->add_entry(Dynamic_entry(tag, od, true)); } | |
a3ad94ed ILT |
1032 | |
1033 | // Add a new dynamic entry with the address of a symbol. | |
1034 | void | |
16649710 | 1035 | add_symbol(elfcpp::DT tag, const Symbol* sym) |
a3ad94ed ILT |
1036 | { this->add_entry(Dynamic_entry(tag, sym)); } |
1037 | ||
1038 | // Add a new dynamic entry with a string. | |
1039 | void | |
1040 | add_string(elfcpp::DT tag, const char* str) | |
1041 | { this->add_entry(Dynamic_entry(tag, this->pool_->add(str, NULL))); } | |
1042 | ||
1043 | // Set the final data size. | |
1044 | void | |
1045 | do_set_address(uint64_t, off_t); | |
1046 | ||
1047 | // Write out the dynamic entries. | |
1048 | void | |
1049 | do_write(Output_file*); | |
1050 | ||
16649710 ILT |
1051 | protected: |
1052 | // Adjust the output section to set the entry size. | |
1053 | void | |
1054 | do_adjust_output_section(Output_section*); | |
1055 | ||
a3ad94ed ILT |
1056 | private: |
1057 | // This POD class holds a single dynamic entry. | |
1058 | class Dynamic_entry | |
1059 | { | |
1060 | public: | |
1061 | // Create an entry with a fixed numeric value. | |
1062 | Dynamic_entry(elfcpp::DT tag, unsigned int val) | |
1063 | : tag_(tag), classification_(DYNAMIC_NUMBER) | |
1064 | { this->u_.val = val; } | |
1065 | ||
1066 | // Create an entry with the size or address of a section. | |
16649710 | 1067 | Dynamic_entry(elfcpp::DT tag, const Output_data* od, bool section_size) |
a3ad94ed ILT |
1068 | : tag_(tag), |
1069 | classification_(section_size | |
1070 | ? DYNAMIC_SECTION_SIZE | |
1071 | : DYNAMIC_SECTION_ADDRESS) | |
16649710 | 1072 | { this->u_.od = od; } |
a3ad94ed ILT |
1073 | |
1074 | // Create an entry with the address of a symbol. | |
16649710 | 1075 | Dynamic_entry(elfcpp::DT tag, const Symbol* sym) |
a3ad94ed ILT |
1076 | : tag_(tag), classification_(DYNAMIC_SYMBOL) |
1077 | { this->u_.sym = sym; } | |
1078 | ||
1079 | // Create an entry with a string. | |
1080 | Dynamic_entry(elfcpp::DT tag, const char* str) | |
1081 | : tag_(tag), classification_(DYNAMIC_STRING) | |
1082 | { this->u_.str = str; } | |
1083 | ||
1084 | // Write the dynamic entry to an output view. | |
1085 | template<int size, bool big_endian> | |
1086 | void | |
1ddbd1e6 | 1087 | write(unsigned char* pov, const Stringpool* ACCEPT_SIZE_ENDIAN) const; |
a3ad94ed ILT |
1088 | |
1089 | private: | |
1090 | enum Classification | |
1091 | { | |
1092 | // Number. | |
1093 | DYNAMIC_NUMBER, | |
1094 | // Section address. | |
1095 | DYNAMIC_SECTION_ADDRESS, | |
1096 | // Section size. | |
1097 | DYNAMIC_SECTION_SIZE, | |
1098 | // Symbol adress. | |
1099 | DYNAMIC_SYMBOL, | |
1100 | // String. | |
1101 | DYNAMIC_STRING | |
1102 | }; | |
1103 | ||
1104 | union | |
1105 | { | |
1106 | // For DYNAMIC_NUMBER. | |
1107 | unsigned int val; | |
1108 | // For DYNAMIC_SECTION_ADDRESS and DYNAMIC_SECTION_SIZE. | |
16649710 | 1109 | const Output_data* od; |
a3ad94ed | 1110 | // For DYNAMIC_SYMBOL. |
16649710 | 1111 | const Symbol* sym; |
a3ad94ed ILT |
1112 | // For DYNAMIC_STRING. |
1113 | const char* str; | |
1114 | } u_; | |
1115 | // The dynamic tag. | |
1116 | elfcpp::DT tag_; | |
1117 | // The type of entry. | |
1118 | Classification classification_; | |
1119 | }; | |
1120 | ||
1121 | // Add an entry to the list. | |
1122 | void | |
1123 | add_entry(const Dynamic_entry& entry) | |
1124 | { this->entries_.push_back(entry); } | |
1125 | ||
1126 | // Sized version of write function. | |
1127 | template<int size, bool big_endian> | |
1128 | void | |
1129 | sized_write(Output_file* of); | |
1130 | ||
1131 | // The type of the list of entries. | |
1132 | typedef std::vector<Dynamic_entry> Dynamic_entries; | |
1133 | ||
1134 | // The target. | |
1135 | const Target* target_; | |
1136 | // The entries. | |
1137 | Dynamic_entries entries_; | |
1138 | // The pool used for strings. | |
1139 | Stringpool* pool_; | |
1140 | }; | |
1141 | ||
a2fb1b05 ILT |
1142 | // An output section. We don't expect to have too many output |
1143 | // sections, so we don't bother to do a template on the size. | |
1144 | ||
54dc6425 | 1145 | class Output_section : public Output_data |
a2fb1b05 ILT |
1146 | { |
1147 | public: | |
1148 | // Create an output section, giving the name, type, and flags. | |
b8e6aad9 | 1149 | Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword); |
54dc6425 | 1150 | virtual ~Output_section(); |
a2fb1b05 | 1151 | |
ead1e424 ILT |
1152 | // Add a new input section SHNDX, named NAME, with header SHDR, from |
1153 | // object OBJECT. Return the offset within the output section. | |
a2fb1b05 ILT |
1154 | template<int size, bool big_endian> |
1155 | off_t | |
f6ce93d6 | 1156 | add_input_section(Relobj* object, unsigned int shndx, const char *name, |
a2fb1b05 ILT |
1157 | const elfcpp::Shdr<size, big_endian>& shdr); |
1158 | ||
b8e6aad9 | 1159 | // Add generated data POSD to this output section. |
c06b7b0b | 1160 | void |
ead1e424 ILT |
1161 | add_output_section_data(Output_section_data* posd); |
1162 | ||
a2fb1b05 ILT |
1163 | // Return the section name. |
1164 | const char* | |
1165 | name() const | |
1166 | { return this->name_; } | |
1167 | ||
1168 | // Return the section type. | |
1169 | elfcpp::Elf_Word | |
1170 | type() const | |
1171 | { return this->type_; } | |
1172 | ||
1173 | // Return the section flags. | |
1174 | elfcpp::Elf_Xword | |
1175 | flags() const | |
1176 | { return this->flags_; } | |
1177 | ||
ead1e424 | 1178 | // Return the section index in the output file. |
61ba1cf9 | 1179 | unsigned int |
ead1e424 ILT |
1180 | do_out_shndx() const |
1181 | { return this->out_shndx_; } | |
1182 | ||
1183 | // Set the output section index. | |
1184 | void | |
1185 | do_set_out_shndx(unsigned int shndx) | |
1186 | { this->out_shndx_ = shndx; } | |
61ba1cf9 | 1187 | |
a3ad94ed ILT |
1188 | // Return the entsize field. |
1189 | uint64_t | |
1190 | entsize() const | |
1191 | { return this->entsize_; } | |
1192 | ||
61ba1cf9 ILT |
1193 | // Set the entsize field. |
1194 | void | |
16649710 | 1195 | set_entsize(uint64_t v); |
61ba1cf9 | 1196 | |
16649710 ILT |
1197 | // Set the link field to the output section index of a section. |
1198 | void | |
14b31740 | 1199 | set_link_section(const Output_data* od) |
16649710 ILT |
1200 | { |
1201 | gold_assert(this->link_ == 0 | |
1202 | && !this->should_link_to_symtab_ | |
1203 | && !this->should_link_to_dynsym_); | |
1204 | this->link_section_ = od; | |
1205 | } | |
1206 | ||
1207 | // Set the link field to a constant. | |
61ba1cf9 ILT |
1208 | void |
1209 | set_link(unsigned int v) | |
16649710 ILT |
1210 | { |
1211 | gold_assert(this->link_section_ == NULL | |
1212 | && !this->should_link_to_symtab_ | |
1213 | && !this->should_link_to_dynsym_); | |
1214 | this->link_ = v; | |
1215 | } | |
61ba1cf9 | 1216 | |
16649710 ILT |
1217 | // Record that this section should link to the normal symbol table. |
1218 | void | |
1219 | set_should_link_to_symtab() | |
1220 | { | |
1221 | gold_assert(this->link_section_ == NULL | |
1222 | && this->link_ == 0 | |
1223 | && !this->should_link_to_dynsym_); | |
1224 | this->should_link_to_symtab_ = true; | |
1225 | } | |
1226 | ||
1227 | // Record that this section should link to the dynamic symbol table. | |
1228 | void | |
1229 | set_should_link_to_dynsym() | |
1230 | { | |
1231 | gold_assert(this->link_section_ == NULL | |
1232 | && this->link_ == 0 | |
1233 | && !this->should_link_to_symtab_); | |
1234 | this->should_link_to_dynsym_ = true; | |
1235 | } | |
1236 | ||
1237 | // Return the info field. | |
1238 | unsigned int | |
1239 | info() const | |
1240 | { | |
1241 | gold_assert(this->info_section_ == NULL); | |
1242 | return this->info_; | |
1243 | } | |
1244 | ||
1245 | // Set the info field to the output section index of a section. | |
1246 | void | |
14b31740 | 1247 | set_info_section(const Output_data* od) |
16649710 ILT |
1248 | { |
1249 | gold_assert(this->info_ == 0); | |
1250 | this->info_section_ = od; | |
1251 | } | |
1252 | ||
1253 | // Set the info field to a constant. | |
61ba1cf9 ILT |
1254 | void |
1255 | set_info(unsigned int v) | |
16649710 ILT |
1256 | { |
1257 | gold_assert(this->info_section_ == NULL); | |
1258 | this->info_ = v; | |
1259 | } | |
61ba1cf9 ILT |
1260 | |
1261 | // Set the addralign field. | |
1262 | void | |
1263 | set_addralign(uint64_t v) | |
1264 | { this->addralign_ = v; } | |
1265 | ||
c06b7b0b ILT |
1266 | // Indicate that we need a symtab index. |
1267 | void | |
1268 | set_needs_symtab_index() | |
1269 | { this->needs_symtab_index_ = true; } | |
1270 | ||
1271 | // Return whether we need a symtab index. | |
1272 | bool | |
1273 | needs_symtab_index() const | |
1274 | { return this->needs_symtab_index_; } | |
1275 | ||
1276 | // Get the symtab index. | |
1277 | unsigned int | |
1278 | symtab_index() const | |
1279 | { | |
a3ad94ed | 1280 | gold_assert(this->symtab_index_ != 0); |
c06b7b0b ILT |
1281 | return this->symtab_index_; |
1282 | } | |
1283 | ||
1284 | // Set the symtab index. | |
1285 | void | |
1286 | set_symtab_index(unsigned int index) | |
1287 | { | |
a3ad94ed | 1288 | gold_assert(index != 0); |
c06b7b0b ILT |
1289 | this->symtab_index_ = index; |
1290 | } | |
1291 | ||
1292 | // Indicate that we need a dynsym index. | |
1293 | void | |
1294 | set_needs_dynsym_index() | |
1295 | { this->needs_dynsym_index_ = true; } | |
1296 | ||
1297 | // Return whether we need a dynsym index. | |
1298 | bool | |
1299 | needs_dynsym_index() const | |
1300 | { return this->needs_dynsym_index_; } | |
1301 | ||
1302 | // Get the dynsym index. | |
1303 | unsigned int | |
1304 | dynsym_index() const | |
1305 | { | |
a3ad94ed | 1306 | gold_assert(this->dynsym_index_ != 0); |
c06b7b0b ILT |
1307 | return this->dynsym_index_; |
1308 | } | |
1309 | ||
1310 | // Set the dynsym index. | |
1311 | void | |
1312 | set_dynsym_index(unsigned int index) | |
1313 | { | |
a3ad94ed | 1314 | gold_assert(index != 0); |
c06b7b0b ILT |
1315 | this->dynsym_index_ = index; |
1316 | } | |
1317 | ||
b8e6aad9 ILT |
1318 | // Return the output virtual address of OFFSET relative to the start |
1319 | // of input section SHNDX in object OBJECT. | |
1320 | uint64_t | |
1321 | output_address(const Relobj* object, unsigned int shndx, | |
1322 | off_t offset) const; | |
1323 | ||
ead1e424 ILT |
1324 | // Set the address of the Output_section. For a typical |
1325 | // Output_section, there is nothing to do, but if there are any | |
1326 | // Output_section_data objects we need to set the final addresses | |
1327 | // here. | |
1328 | void | |
1329 | do_set_address(uint64_t, off_t); | |
1330 | ||
54dc6425 | 1331 | // Write the data to the file. For a typical Output_section, this |
ead1e424 ILT |
1332 | // does nothing: the data is written out by calling Object::Relocate |
1333 | // on each input object. But if there are any Output_section_data | |
1334 | // objects we do need to write them out here. | |
a3ad94ed | 1335 | void |
ead1e424 | 1336 | do_write(Output_file*); |
54dc6425 | 1337 | |
75f65a3e ILT |
1338 | // Return the address alignment--function required by parent class. |
1339 | uint64_t | |
1340 | do_addralign() const | |
1341 | { return this->addralign_; } | |
1342 | ||
1343 | // Return whether this is an Output_section. | |
1344 | bool | |
1345 | do_is_section() const | |
1346 | { return true; } | |
1347 | ||
54dc6425 ILT |
1348 | // Return whether this is a section of the specified type. |
1349 | bool | |
75f65a3e | 1350 | do_is_section_type(elfcpp::Elf_Word type) const |
54dc6425 ILT |
1351 | { return this->type_ == type; } |
1352 | ||
1353 | // Return whether the specified section flag is set. | |
1354 | bool | |
75f65a3e | 1355 | do_is_section_flag_set(elfcpp::Elf_Xword flag) const |
54dc6425 ILT |
1356 | { return (this->flags_ & flag) != 0; } |
1357 | ||
61ba1cf9 ILT |
1358 | // Write the section header into *OPHDR. |
1359 | template<int size, bool big_endian> | |
1360 | void | |
16649710 ILT |
1361 | write_header(const Layout*, const Stringpool*, |
1362 | elfcpp::Shdr_write<size, big_endian>*) const; | |
61ba1cf9 | 1363 | |
a2fb1b05 | 1364 | private: |
ead1e424 ILT |
1365 | // In some cases we need to keep a list of the input sections |
1366 | // associated with this output section. We only need the list if we | |
1367 | // might have to change the offsets of the input section within the | |
1368 | // output section after we add the input section. The ordinary | |
1369 | // input sections will be written out when we process the object | |
1370 | // file, and as such we don't need to track them here. We do need | |
1371 | // to track Output_section_data objects here. We store instances of | |
1372 | // this structure in a std::vector, so it must be a POD. There can | |
1373 | // be many instances of this structure, so we use a union to save | |
1374 | // some space. | |
1375 | class Input_section | |
1376 | { | |
1377 | public: | |
1378 | Input_section() | |
b8e6aad9 ILT |
1379 | : shndx_(0), p2align_(0) |
1380 | { | |
1381 | this->u1_.data_size = 0; | |
1382 | this->u2_.object = NULL; | |
1383 | } | |
ead1e424 | 1384 | |
b8e6aad9 | 1385 | // For an ordinary input section. |
f6ce93d6 | 1386 | Input_section(Relobj* object, unsigned int shndx, off_t data_size, |
ead1e424 ILT |
1387 | uint64_t addralign) |
1388 | : shndx_(shndx), | |
b8e6aad9 | 1389 | p2align_(ffsll(static_cast<long long>(addralign))) |
ead1e424 | 1390 | { |
b8e6aad9 ILT |
1391 | gold_assert(shndx != OUTPUT_SECTION_CODE |
1392 | && shndx != MERGE_DATA_SECTION_CODE | |
1393 | && shndx != MERGE_STRING_SECTION_CODE); | |
1394 | this->u1_.data_size = data_size; | |
1395 | this->u2_.object = object; | |
ead1e424 ILT |
1396 | } |
1397 | ||
b8e6aad9 | 1398 | // For a non-merge output section. |
ead1e424 | 1399 | Input_section(Output_section_data* posd) |
b8e6aad9 ILT |
1400 | : shndx_(OUTPUT_SECTION_CODE), |
1401 | p2align_(ffsll(static_cast<long long>(posd->addralign()))) | |
1402 | { | |
1403 | this->u1_.data_size = 0; | |
1404 | this->u2_.posd = posd; | |
1405 | } | |
1406 | ||
1407 | // For a merge section. | |
1408 | Input_section(Output_section_data* posd, bool is_string, uint64_t entsize) | |
1409 | : shndx_(is_string | |
1410 | ? MERGE_STRING_SECTION_CODE | |
1411 | : MERGE_DATA_SECTION_CODE), | |
1412 | p2align_(ffsll(static_cast<long long>(posd->addralign()))) | |
1413 | { | |
1414 | this->u1_.entsize = entsize; | |
1415 | this->u2_.posd = posd; | |
1416 | } | |
ead1e424 ILT |
1417 | |
1418 | // The required alignment. | |
1419 | uint64_t | |
1420 | addralign() const | |
a3ad94ed ILT |
1421 | { |
1422 | return (this->p2align_ == 0 | |
1423 | ? 0 | |
1424 | : static_cast<uint64_t>(1) << (this->p2align_ - 1)); | |
1425 | } | |
ead1e424 ILT |
1426 | |
1427 | // Return the required size. | |
1428 | off_t | |
1429 | data_size() const; | |
1430 | ||
b8e6aad9 ILT |
1431 | // Return whether this is a merge section which matches the |
1432 | // parameters. | |
1433 | bool | |
1434 | is_merge_section(bool is_string, uint64_t entsize) const | |
1435 | { | |
1436 | return (this->shndx_ == (is_string | |
1437 | ? MERGE_STRING_SECTION_CODE | |
1438 | : MERGE_DATA_SECTION_CODE) | |
1439 | && this->u1_.entsize == entsize); | |
1440 | } | |
1441 | ||
1442 | // Set the output section. | |
1443 | void | |
1444 | set_output_section(Output_section* os) | |
1445 | { | |
1446 | gold_assert(!this->is_input_section()); | |
1447 | this->u2_.posd->set_output_section(os); | |
1448 | } | |
1449 | ||
ead1e424 ILT |
1450 | // Set the address and file offset. This is called during |
1451 | // Layout::finalize. SECOFF is the file offset of the enclosing | |
1452 | // section. | |
1453 | void | |
1454 | set_address(uint64_t addr, off_t off, off_t secoff); | |
1455 | ||
b8e6aad9 ILT |
1456 | // Add an input section, for SHF_MERGE sections. |
1457 | bool | |
1458 | add_input_section(Relobj* object, unsigned int shndx) | |
1459 | { | |
1460 | gold_assert(this->shndx_ == MERGE_DATA_SECTION_CODE | |
1461 | || this->shndx_ == MERGE_STRING_SECTION_CODE); | |
1462 | return this->u2_.posd->add_input_section(object, shndx); | |
1463 | } | |
1464 | ||
1465 | // Given an input OBJECT, an input section index SHNDX within that | |
1466 | // object, and an OFFSET relative to the start of that input | |
1467 | // section, return whether or not the output address is known. | |
1468 | // OUTPUT_SECTION_ADDRESS is the address of the output section | |
1469 | // which this is a part of. If this function returns true, it | |
1470 | // sets *POUTPUT to the output address. | |
1471 | bool | |
1472 | output_address(const Relobj* object, unsigned int shndx, off_t offset, | |
1473 | uint64_t output_section_address, uint64_t *poutput) const; | |
1474 | ||
ead1e424 ILT |
1475 | // Write out the data. This does nothing for an input section. |
1476 | void | |
1477 | write(Output_file*); | |
1478 | ||
1479 | private: | |
b8e6aad9 ILT |
1480 | // Code values which appear in shndx_. If the value is not one of |
1481 | // these codes, it is the input section index in the object file. | |
1482 | enum | |
1483 | { | |
1484 | // An Output_section_data. | |
1485 | OUTPUT_SECTION_CODE = -1U, | |
1486 | // An Output_section_data for an SHF_MERGE section with | |
1487 | // SHF_STRINGS not set. | |
1488 | MERGE_DATA_SECTION_CODE = -2U, | |
1489 | // An Output_section_data for an SHF_MERGE section with | |
1490 | // SHF_STRINGS set. | |
1491 | MERGE_STRING_SECTION_CODE = -3U | |
1492 | }; | |
1493 | ||
ead1e424 ILT |
1494 | // Whether this is an input section. |
1495 | bool | |
1496 | is_input_section() const | |
b8e6aad9 ILT |
1497 | { |
1498 | return (this->shndx_ != OUTPUT_SECTION_CODE | |
1499 | && this->shndx_ != MERGE_DATA_SECTION_CODE | |
1500 | && this->shndx_ != MERGE_STRING_SECTION_CODE); | |
1501 | } | |
ead1e424 | 1502 | |
b8e6aad9 ILT |
1503 | // For an ordinary input section, this is the section index in the |
1504 | // input file. For an Output_section_data, this is | |
1505 | // OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or | |
1506 | // MERGE_STRING_SECTION_CODE. | |
ead1e424 ILT |
1507 | unsigned int shndx_; |
1508 | // The required alignment, stored as a power of 2. | |
1509 | unsigned int p2align_; | |
ead1e424 ILT |
1510 | union |
1511 | { | |
b8e6aad9 ILT |
1512 | // For an ordinary input section, the section size. |
1513 | off_t data_size; | |
1514 | // For OUTPUT_SECTION_CODE, this is not used. For | |
1515 | // MERGE_DATA_SECTION_CODE or MERGE_STRING_SECTION_CODE, the | |
1516 | // entity size. | |
1517 | uint64_t entsize; | |
1518 | } u1_; | |
1519 | union | |
1520 | { | |
1521 | // For an ordinary input section, the object which holds the | |
ead1e424 | 1522 | // input section. |
f6ce93d6 | 1523 | Relobj* object; |
b8e6aad9 ILT |
1524 | // For OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or |
1525 | // MERGE_STRING_SECTION_CODE, the data. | |
ead1e424 | 1526 | Output_section_data* posd; |
b8e6aad9 | 1527 | } u2_; |
ead1e424 ILT |
1528 | }; |
1529 | ||
1530 | typedef std::vector<Input_section> Input_section_list; | |
1531 | ||
b8e6aad9 ILT |
1532 | // Add a new output section by Input_section. |
1533 | void | |
1534 | add_output_section_data(Input_section*); | |
1535 | ||
1536 | // Add an SHF_MERGE input section. Returns true if the section was | |
1537 | // handled. | |
1538 | bool | |
1539 | add_merge_input_section(Relobj* object, unsigned int shndx, uint64_t flags, | |
1540 | uint64_t entsize, uint64_t addralign); | |
1541 | ||
1542 | // Add an output SHF_MERGE section POSD to this output section. | |
1543 | // IS_STRING indicates whether it is a SHF_STRINGS section, and | |
1544 | // ENTSIZE is the entity size. This returns the entry added to | |
1545 | // input_sections_. | |
1546 | void | |
1547 | add_output_merge_section(Output_section_data* posd, bool is_string, | |
1548 | uint64_t entsize); | |
1549 | ||
a2fb1b05 ILT |
1550 | // Most of these fields are only valid after layout. |
1551 | ||
1552 | // The name of the section. This will point into a Stringpool. | |
1553 | const char* name_; | |
75f65a3e | 1554 | // The section address is in the parent class. |
a2fb1b05 ILT |
1555 | // The section alignment. |
1556 | uint64_t addralign_; | |
1557 | // The section entry size. | |
1558 | uint64_t entsize_; | |
75f65a3e | 1559 | // The file offset is in the parent class. |
16649710 | 1560 | // Set the section link field to the index of this section. |
14b31740 | 1561 | const Output_data* link_section_; |
16649710 | 1562 | // If link_section_ is NULL, this is the link field. |
a2fb1b05 | 1563 | unsigned int link_; |
16649710 | 1564 | // Set the section info field to the index of this section. |
14b31740 | 1565 | const Output_data* info_section_; |
16649710 | 1566 | // If info_section_ is NULL, this is the section info field. |
a2fb1b05 ILT |
1567 | unsigned int info_; |
1568 | // The section type. | |
1569 | elfcpp::Elf_Word type_; | |
1570 | // The section flags. | |
1571 | elfcpp::Elf_Xword flags_; | |
61ba1cf9 | 1572 | // The section index. |
ead1e424 | 1573 | unsigned int out_shndx_; |
c06b7b0b ILT |
1574 | // If there is a STT_SECTION for this output section in the normal |
1575 | // symbol table, this is the symbol index. This starts out as zero. | |
1576 | // It is initialized in Layout::finalize() to be the index, or -1U | |
1577 | // if there isn't one. | |
1578 | unsigned int symtab_index_; | |
1579 | // If there is a STT_SECTION for this output section in the dynamic | |
1580 | // symbol table, this is the symbol index. This starts out as zero. | |
1581 | // It is initialized in Layout::finalize() to be the index, or -1U | |
1582 | // if there isn't one. | |
1583 | unsigned int dynsym_index_; | |
ead1e424 ILT |
1584 | // The input sections. This will be empty in cases where we don't |
1585 | // need to keep track of them. | |
1586 | Input_section_list input_sections_; | |
1587 | // The offset of the first entry in input_sections_. | |
1588 | off_t first_input_offset_; | |
c06b7b0b ILT |
1589 | // Whether this output section needs a STT_SECTION symbol in the |
1590 | // normal symbol table. This will be true if there is a relocation | |
1591 | // which needs it. | |
1592 | bool needs_symtab_index_ : 1; | |
1593 | // Whether this output section needs a STT_SECTION symbol in the | |
1594 | // dynamic symbol table. This will be true if there is a dynamic | |
1595 | // relocation which needs it. | |
1596 | bool needs_dynsym_index_ : 1; | |
16649710 ILT |
1597 | // Whether the link field of this output section should point to the |
1598 | // normal symbol table. | |
1599 | bool should_link_to_symtab_ : 1; | |
1600 | // Whether the link field of this output section should point to the | |
1601 | // dynamic symbol table. | |
1602 | bool should_link_to_dynsym_ : 1; | |
a2fb1b05 ILT |
1603 | }; |
1604 | ||
1605 | // An output segment. PT_LOAD segments are built from collections of | |
1606 | // output sections. Other segments typically point within PT_LOAD | |
1607 | // segments, and are built directly as needed. | |
1608 | ||
1609 | class Output_segment | |
1610 | { | |
1611 | public: | |
1612 | // Create an output segment, specifying the type and flags. | |
1613 | Output_segment(elfcpp::Elf_Word, elfcpp::Elf_Word); | |
1614 | ||
1615 | // Return the virtual address. | |
1616 | uint64_t | |
1617 | vaddr() const | |
1618 | { return this->vaddr_; } | |
1619 | ||
1620 | // Return the physical address. | |
1621 | uint64_t | |
1622 | paddr() const | |
1623 | { return this->paddr_; } | |
1624 | ||
1625 | // Return the segment type. | |
1626 | elfcpp::Elf_Word | |
1627 | type() const | |
1628 | { return this->type_; } | |
1629 | ||
1630 | // Return the segment flags. | |
1631 | elfcpp::Elf_Word | |
1632 | flags() const | |
1633 | { return this->flags_; } | |
1634 | ||
92e059d8 ILT |
1635 | // Return the memory size. |
1636 | uint64_t | |
1637 | memsz() const | |
1638 | { return this->memsz_; } | |
1639 | ||
ead1e424 ILT |
1640 | // Return the file size. |
1641 | off_t | |
1642 | filesz() const | |
1643 | { return this->filesz_; } | |
1644 | ||
75f65a3e ILT |
1645 | // Return the maximum alignment of the Output_data. |
1646 | uint64_t | |
ead1e424 | 1647 | addralign(); |
75f65a3e | 1648 | |
a2fb1b05 ILT |
1649 | // Add an Output_section to this segment. |
1650 | void | |
dbe717ef ILT |
1651 | add_output_section(Output_section* os, elfcpp::Elf_Word seg_flags) |
1652 | { this->add_output_section(os, seg_flags, false); } | |
1653 | ||
1654 | // Add an Output_section to the start of this segment. | |
1655 | void | |
1656 | add_initial_output_section(Output_section* os, elfcpp::Elf_Word seg_flags) | |
1657 | { this->add_output_section(os, seg_flags, true); } | |
75f65a3e ILT |
1658 | |
1659 | // Add an Output_data (which is not an Output_section) to the start | |
1660 | // of this segment. | |
1661 | void | |
1662 | add_initial_output_data(Output_data*); | |
1663 | ||
1664 | // Set the address of the segment to ADDR and the offset to *POFF | |
1665 | // (aligned if necessary), and set the addresses and offsets of all | |
ead1e424 ILT |
1666 | // contained output sections accordingly. Set the section indexes |
1667 | // of all contained output sections starting with *PSHNDX. Return | |
1668 | // the address of the immediately following segment. Update *POFF | |
1669 | // and *PSHNDX. This should only be called for a PT_LOAD segment. | |
75f65a3e | 1670 | uint64_t |
ead1e424 | 1671 | set_section_addresses(uint64_t addr, off_t* poff, unsigned int* pshndx); |
75f65a3e ILT |
1672 | |
1673 | // Set the offset of this segment based on the section. This should | |
1674 | // only be called for a non-PT_LOAD segment. | |
1675 | void | |
1676 | set_offset(); | |
1677 | ||
1678 | // Return the number of output sections. | |
1679 | unsigned int | |
1680 | output_section_count() const; | |
a2fb1b05 | 1681 | |
61ba1cf9 ILT |
1682 | // Write the segment header into *OPHDR. |
1683 | template<int size, bool big_endian> | |
1684 | void | |
ead1e424 | 1685 | write_header(elfcpp::Phdr_write<size, big_endian>*); |
61ba1cf9 ILT |
1686 | |
1687 | // Write the section headers of associated sections into V. | |
1688 | template<int size, bool big_endian> | |
1689 | unsigned char* | |
16649710 | 1690 | write_section_headers(const Layout*, const Stringpool*, unsigned char* v, |
ead1e424 | 1691 | unsigned int* pshndx ACCEPT_SIZE_ENDIAN) const; |
61ba1cf9 | 1692 | |
a2fb1b05 ILT |
1693 | private: |
1694 | Output_segment(const Output_segment&); | |
1695 | Output_segment& operator=(const Output_segment&); | |
1696 | ||
54dc6425 | 1697 | typedef std::list<Output_data*> Output_data_list; |
a2fb1b05 | 1698 | |
dbe717ef ILT |
1699 | // Add an Output_section to this segment, specifying front or back. |
1700 | void | |
1701 | add_output_section(Output_section*, elfcpp::Elf_Word seg_flags, | |
1702 | bool front); | |
1703 | ||
ead1e424 ILT |
1704 | // Find the maximum alignment in an Output_data_list. |
1705 | static uint64_t | |
1706 | maximum_alignment(const Output_data_list*); | |
1707 | ||
75f65a3e ILT |
1708 | // Set the section addresses in an Output_data_list. |
1709 | uint64_t | |
ead1e424 ILT |
1710 | set_section_list_addresses(Output_data_list*, uint64_t addr, off_t* poff, |
1711 | unsigned int* pshndx); | |
75f65a3e ILT |
1712 | |
1713 | // Return the number of Output_sections in an Output_data_list. | |
1714 | unsigned int | |
1715 | output_section_count_list(const Output_data_list*) const; | |
1716 | ||
61ba1cf9 ILT |
1717 | // Write the section headers in the list into V. |
1718 | template<int size, bool big_endian> | |
1719 | unsigned char* | |
16649710 ILT |
1720 | write_section_headers_list(const Layout*, const Stringpool*, |
1721 | const Output_data_list*, unsigned char* v, | |
ead1e424 | 1722 | unsigned int* pshdx ACCEPT_SIZE_ENDIAN) const; |
61ba1cf9 | 1723 | |
75f65a3e | 1724 | // The list of output data with contents attached to this segment. |
54dc6425 | 1725 | Output_data_list output_data_; |
75f65a3e ILT |
1726 | // The list of output data without contents attached to this segment. |
1727 | Output_data_list output_bss_; | |
a2fb1b05 ILT |
1728 | // The segment virtual address. |
1729 | uint64_t vaddr_; | |
1730 | // The segment physical address. | |
1731 | uint64_t paddr_; | |
1732 | // The size of the segment in memory. | |
1733 | uint64_t memsz_; | |
1734 | // The segment alignment. | |
1735 | uint64_t align_; | |
1736 | // The offset of the segment data within the file. | |
1737 | off_t offset_; | |
1738 | // The size of the segment data in the file. | |
1739 | off_t filesz_; | |
1740 | // The segment type; | |
1741 | elfcpp::Elf_Word type_; | |
1742 | // The segment flags. | |
1743 | elfcpp::Elf_Word flags_; | |
ead1e424 ILT |
1744 | // Whether we have set align_. |
1745 | bool is_align_known_; | |
a2fb1b05 ILT |
1746 | }; |
1747 | ||
61ba1cf9 | 1748 | // This class represents the output file. |
a2fb1b05 ILT |
1749 | |
1750 | class Output_file | |
1751 | { | |
1752 | public: | |
61ba1cf9 ILT |
1753 | Output_file(const General_options& options); |
1754 | ||
1755 | // Open the output file. FILE_SIZE is the final size of the file. | |
1756 | void | |
1757 | open(off_t file_size); | |
1758 | ||
1759 | // Close the output file and make sure there are no error. | |
1760 | void | |
1761 | close(); | |
1762 | ||
1763 | // We currently always use mmap which makes the view handling quite | |
1764 | // simple. In the future we may support other approaches. | |
a2fb1b05 ILT |
1765 | |
1766 | // Write data to the output file. | |
1767 | void | |
61ba1cf9 ILT |
1768 | write(off_t offset, const void* data, off_t len) |
1769 | { memcpy(this->base_ + offset, data, len); } | |
1770 | ||
1771 | // Get a buffer to use to write to the file, given the offset into | |
1772 | // the file and the size. | |
1773 | unsigned char* | |
1774 | get_output_view(off_t start, off_t size) | |
1775 | { | |
a3ad94ed | 1776 | gold_assert(start >= 0 && size >= 0 && start + size <= this->file_size_); |
61ba1cf9 ILT |
1777 | return this->base_ + start; |
1778 | } | |
1779 | ||
1780 | // VIEW must have been returned by get_output_view. Write the | |
1781 | // buffer to the file, passing in the offset and the size. | |
1782 | void | |
1783 | write_output_view(off_t, off_t, unsigned char*) | |
1784 | { } | |
1785 | ||
1786 | private: | |
1787 | // General options. | |
1788 | const General_options& options_; | |
1789 | // File name. | |
1790 | const char* name_; | |
1791 | // File descriptor. | |
1792 | int o_; | |
1793 | // File size. | |
1794 | off_t file_size_; | |
1795 | // Base of file mapped into memory. | |
1796 | unsigned char* base_; | |
a2fb1b05 ILT |
1797 | }; |
1798 | ||
1799 | } // End namespace gold. | |
1800 | ||
1801 | #endif // !defined(GOLD_OUTPUT_H) |