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a2fb1b05 ILT |
1 | // output.cc -- manage the output file for gold |
2 | ||
6cb15b7f ILT |
3 | // Copyright 2006, 2007 Free Software Foundation, Inc. |
4 | // Written by Ian Lance Taylor <iant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
a2fb1b05 ILT |
23 | #include "gold.h" |
24 | ||
25 | #include <cstdlib> | |
61ba1cf9 ILT |
26 | #include <cerrno> |
27 | #include <fcntl.h> | |
28 | #include <unistd.h> | |
29 | #include <sys/mman.h> | |
75f65a3e | 30 | #include <algorithm> |
a2fb1b05 | 31 | |
7e1edb90 | 32 | #include "parameters.h" |
a2fb1b05 | 33 | #include "object.h" |
ead1e424 ILT |
34 | #include "symtab.h" |
35 | #include "reloc.h" | |
b8e6aad9 | 36 | #include "merge.h" |
a2fb1b05 ILT |
37 | #include "output.h" |
38 | ||
39 | namespace gold | |
40 | { | |
41 | ||
a3ad94ed ILT |
42 | // Output_data variables. |
43 | ||
44 | bool Output_data::sizes_are_fixed; | |
45 | ||
a2fb1b05 ILT |
46 | // Output_data methods. |
47 | ||
48 | Output_data::~Output_data() | |
49 | { | |
50 | } | |
51 | ||
75f65a3e ILT |
52 | // Set the address and offset. |
53 | ||
54 | void | |
55 | Output_data::set_address(uint64_t addr, off_t off) | |
56 | { | |
57 | this->address_ = addr; | |
58 | this->offset_ = off; | |
59 | ||
60 | // Let the child class know. | |
61 | this->do_set_address(addr, off); | |
62 | } | |
63 | ||
64 | // Return the default alignment for a size--32 or 64. | |
65 | ||
66 | uint64_t | |
67 | Output_data::default_alignment(int size) | |
68 | { | |
69 | if (size == 32) | |
70 | return 4; | |
71 | else if (size == 64) | |
72 | return 8; | |
73 | else | |
a3ad94ed | 74 | gold_unreachable(); |
75f65a3e ILT |
75 | } |
76 | ||
75f65a3e ILT |
77 | // Output_section_header methods. This currently assumes that the |
78 | // segment and section lists are complete at construction time. | |
79 | ||
80 | Output_section_headers::Output_section_headers( | |
16649710 ILT |
81 | const Layout* layout, |
82 | const Layout::Segment_list* segment_list, | |
83 | const Layout::Section_list* unattached_section_list, | |
61ba1cf9 | 84 | const Stringpool* secnamepool) |
9025d29d | 85 | : layout_(layout), |
75f65a3e | 86 | segment_list_(segment_list), |
a3ad94ed | 87 | unattached_section_list_(unattached_section_list), |
61ba1cf9 | 88 | secnamepool_(secnamepool) |
75f65a3e | 89 | { |
61ba1cf9 ILT |
90 | // Count all the sections. Start with 1 for the null section. |
91 | off_t count = 1; | |
16649710 ILT |
92 | for (Layout::Segment_list::const_iterator p = segment_list->begin(); |
93 | p != segment_list->end(); | |
75f65a3e | 94 | ++p) |
ead1e424 ILT |
95 | if ((*p)->type() == elfcpp::PT_LOAD) |
96 | count += (*p)->output_section_count(); | |
16649710 | 97 | count += unattached_section_list->size(); |
75f65a3e | 98 | |
9025d29d | 99 | const int size = parameters->get_size(); |
75f65a3e ILT |
100 | int shdr_size; |
101 | if (size == 32) | |
102 | shdr_size = elfcpp::Elf_sizes<32>::shdr_size; | |
103 | else if (size == 64) | |
104 | shdr_size = elfcpp::Elf_sizes<64>::shdr_size; | |
105 | else | |
a3ad94ed | 106 | gold_unreachable(); |
75f65a3e ILT |
107 | |
108 | this->set_data_size(count * shdr_size); | |
109 | } | |
110 | ||
61ba1cf9 ILT |
111 | // Write out the section headers. |
112 | ||
75f65a3e | 113 | void |
61ba1cf9 | 114 | Output_section_headers::do_write(Output_file* of) |
a2fb1b05 | 115 | { |
9025d29d | 116 | if (parameters->get_size() == 32) |
61ba1cf9 | 117 | { |
9025d29d ILT |
118 | if (parameters->is_big_endian()) |
119 | { | |
120 | #ifdef HAVE_TARGET_32_BIG | |
121 | this->do_sized_write<32, true>(of); | |
122 | #else | |
123 | gold_unreachable(); | |
124 | #endif | |
125 | } | |
61ba1cf9 | 126 | else |
9025d29d ILT |
127 | { |
128 | #ifdef HAVE_TARGET_32_LITTLE | |
129 | this->do_sized_write<32, false>(of); | |
130 | #else | |
131 | gold_unreachable(); | |
132 | #endif | |
133 | } | |
61ba1cf9 | 134 | } |
9025d29d | 135 | else if (parameters->get_size() == 64) |
61ba1cf9 | 136 | { |
9025d29d ILT |
137 | if (parameters->is_big_endian()) |
138 | { | |
139 | #ifdef HAVE_TARGET_64_BIG | |
140 | this->do_sized_write<64, true>(of); | |
141 | #else | |
142 | gold_unreachable(); | |
143 | #endif | |
144 | } | |
61ba1cf9 | 145 | else |
9025d29d ILT |
146 | { |
147 | #ifdef HAVE_TARGET_64_LITTLE | |
148 | this->do_sized_write<64, false>(of); | |
149 | #else | |
150 | gold_unreachable(); | |
151 | #endif | |
152 | } | |
61ba1cf9 ILT |
153 | } |
154 | else | |
a3ad94ed | 155 | gold_unreachable(); |
61ba1cf9 ILT |
156 | } |
157 | ||
158 | template<int size, bool big_endian> | |
159 | void | |
160 | Output_section_headers::do_sized_write(Output_file* of) | |
161 | { | |
162 | off_t all_shdrs_size = this->data_size(); | |
163 | unsigned char* view = of->get_output_view(this->offset(), all_shdrs_size); | |
164 | ||
165 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
166 | unsigned char* v = view; | |
167 | ||
168 | { | |
169 | typename elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
170 | oshdr.put_sh_name(0); | |
171 | oshdr.put_sh_type(elfcpp::SHT_NULL); | |
172 | oshdr.put_sh_flags(0); | |
173 | oshdr.put_sh_addr(0); | |
174 | oshdr.put_sh_offset(0); | |
175 | oshdr.put_sh_size(0); | |
176 | oshdr.put_sh_link(0); | |
177 | oshdr.put_sh_info(0); | |
178 | oshdr.put_sh_addralign(0); | |
179 | oshdr.put_sh_entsize(0); | |
180 | } | |
181 | ||
182 | v += shdr_size; | |
183 | ||
ead1e424 | 184 | unsigned shndx = 1; |
16649710 ILT |
185 | for (Layout::Segment_list::const_iterator p = this->segment_list_->begin(); |
186 | p != this->segment_list_->end(); | |
61ba1cf9 | 187 | ++p) |
593f47df | 188 | v = (*p)->write_section_headers SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
16649710 | 189 | this->layout_, this->secnamepool_, v, &shndx |
ead1e424 | 190 | SELECT_SIZE_ENDIAN(size, big_endian)); |
a3ad94ed | 191 | for (Layout::Section_list::const_iterator p = |
16649710 ILT |
192 | this->unattached_section_list_->begin(); |
193 | p != this->unattached_section_list_->end(); | |
61ba1cf9 ILT |
194 | ++p) |
195 | { | |
a3ad94ed | 196 | gold_assert(shndx == (*p)->out_shndx()); |
61ba1cf9 | 197 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 198 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); |
61ba1cf9 | 199 | v += shdr_size; |
ead1e424 | 200 | ++shndx; |
61ba1cf9 ILT |
201 | } |
202 | ||
203 | of->write_output_view(this->offset(), all_shdrs_size, view); | |
a2fb1b05 ILT |
204 | } |
205 | ||
54dc6425 ILT |
206 | // Output_segment_header methods. |
207 | ||
61ba1cf9 | 208 | Output_segment_headers::Output_segment_headers( |
61ba1cf9 | 209 | const Layout::Segment_list& segment_list) |
9025d29d | 210 | : segment_list_(segment_list) |
61ba1cf9 | 211 | { |
9025d29d | 212 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
213 | int phdr_size; |
214 | if (size == 32) | |
215 | phdr_size = elfcpp::Elf_sizes<32>::phdr_size; | |
216 | else if (size == 64) | |
217 | phdr_size = elfcpp::Elf_sizes<64>::phdr_size; | |
218 | else | |
a3ad94ed | 219 | gold_unreachable(); |
61ba1cf9 ILT |
220 | |
221 | this->set_data_size(segment_list.size() * phdr_size); | |
222 | } | |
223 | ||
54dc6425 | 224 | void |
61ba1cf9 | 225 | Output_segment_headers::do_write(Output_file* of) |
75f65a3e | 226 | { |
9025d29d | 227 | if (parameters->get_size() == 32) |
61ba1cf9 | 228 | { |
9025d29d ILT |
229 | if (parameters->is_big_endian()) |
230 | { | |
231 | #ifdef HAVE_TARGET_32_BIG | |
232 | this->do_sized_write<32, true>(of); | |
233 | #else | |
234 | gold_unreachable(); | |
235 | #endif | |
236 | } | |
61ba1cf9 | 237 | else |
9025d29d ILT |
238 | { |
239 | #ifdef HAVE_TARGET_32_LITTLE | |
61ba1cf9 | 240 | this->do_sized_write<32, false>(of); |
9025d29d ILT |
241 | #else |
242 | gold_unreachable(); | |
243 | #endif | |
244 | } | |
61ba1cf9 | 245 | } |
9025d29d | 246 | else if (parameters->get_size() == 64) |
61ba1cf9 | 247 | { |
9025d29d ILT |
248 | if (parameters->is_big_endian()) |
249 | { | |
250 | #ifdef HAVE_TARGET_64_BIG | |
251 | this->do_sized_write<64, true>(of); | |
252 | #else | |
253 | gold_unreachable(); | |
254 | #endif | |
255 | } | |
61ba1cf9 | 256 | else |
9025d29d ILT |
257 | { |
258 | #ifdef HAVE_TARGET_64_LITTLE | |
259 | this->do_sized_write<64, false>(of); | |
260 | #else | |
261 | gold_unreachable(); | |
262 | #endif | |
263 | } | |
61ba1cf9 ILT |
264 | } |
265 | else | |
a3ad94ed | 266 | gold_unreachable(); |
61ba1cf9 ILT |
267 | } |
268 | ||
269 | template<int size, bool big_endian> | |
270 | void | |
271 | Output_segment_headers::do_sized_write(Output_file* of) | |
272 | { | |
273 | const int phdr_size = elfcpp::Elf_sizes<size>::phdr_size; | |
274 | off_t all_phdrs_size = this->segment_list_.size() * phdr_size; | |
275 | unsigned char* view = of->get_output_view(this->offset(), | |
276 | all_phdrs_size); | |
277 | unsigned char* v = view; | |
278 | for (Layout::Segment_list::const_iterator p = this->segment_list_.begin(); | |
279 | p != this->segment_list_.end(); | |
280 | ++p) | |
281 | { | |
282 | elfcpp::Phdr_write<size, big_endian> ophdr(v); | |
283 | (*p)->write_header(&ophdr); | |
284 | v += phdr_size; | |
285 | } | |
286 | ||
287 | of->write_output_view(this->offset(), all_phdrs_size, view); | |
75f65a3e ILT |
288 | } |
289 | ||
290 | // Output_file_header methods. | |
291 | ||
9025d29d | 292 | Output_file_header::Output_file_header(const Target* target, |
75f65a3e ILT |
293 | const Symbol_table* symtab, |
294 | const Output_segment_headers* osh) | |
9025d29d | 295 | : target_(target), |
75f65a3e | 296 | symtab_(symtab), |
61ba1cf9 | 297 | segment_header_(osh), |
75f65a3e ILT |
298 | section_header_(NULL), |
299 | shstrtab_(NULL) | |
300 | { | |
9025d29d | 301 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
302 | int ehdr_size; |
303 | if (size == 32) | |
304 | ehdr_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
305 | else if (size == 64) | |
306 | ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
307 | else | |
a3ad94ed | 308 | gold_unreachable(); |
61ba1cf9 ILT |
309 | |
310 | this->set_data_size(ehdr_size); | |
75f65a3e ILT |
311 | } |
312 | ||
313 | // Set the section table information for a file header. | |
314 | ||
315 | void | |
316 | Output_file_header::set_section_info(const Output_section_headers* shdrs, | |
317 | const Output_section* shstrtab) | |
318 | { | |
319 | this->section_header_ = shdrs; | |
320 | this->shstrtab_ = shstrtab; | |
321 | } | |
322 | ||
323 | // Write out the file header. | |
324 | ||
325 | void | |
61ba1cf9 | 326 | Output_file_header::do_write(Output_file* of) |
54dc6425 | 327 | { |
9025d29d | 328 | if (parameters->get_size() == 32) |
61ba1cf9 | 329 | { |
9025d29d ILT |
330 | if (parameters->is_big_endian()) |
331 | { | |
332 | #ifdef HAVE_TARGET_32_BIG | |
333 | this->do_sized_write<32, true>(of); | |
334 | #else | |
335 | gold_unreachable(); | |
336 | #endif | |
337 | } | |
61ba1cf9 | 338 | else |
9025d29d ILT |
339 | { |
340 | #ifdef HAVE_TARGET_32_LITTLE | |
341 | this->do_sized_write<32, false>(of); | |
342 | #else | |
343 | gold_unreachable(); | |
344 | #endif | |
345 | } | |
61ba1cf9 | 346 | } |
9025d29d | 347 | else if (parameters->get_size() == 64) |
61ba1cf9 | 348 | { |
9025d29d ILT |
349 | if (parameters->is_big_endian()) |
350 | { | |
351 | #ifdef HAVE_TARGET_64_BIG | |
352 | this->do_sized_write<64, true>(of); | |
353 | #else | |
354 | gold_unreachable(); | |
355 | #endif | |
356 | } | |
61ba1cf9 | 357 | else |
9025d29d ILT |
358 | { |
359 | #ifdef HAVE_TARGET_64_LITTLE | |
360 | this->do_sized_write<64, false>(of); | |
361 | #else | |
362 | gold_unreachable(); | |
363 | #endif | |
364 | } | |
61ba1cf9 ILT |
365 | } |
366 | else | |
a3ad94ed | 367 | gold_unreachable(); |
61ba1cf9 ILT |
368 | } |
369 | ||
370 | // Write out the file header with appropriate size and endianess. | |
371 | ||
372 | template<int size, bool big_endian> | |
373 | void | |
374 | Output_file_header::do_sized_write(Output_file* of) | |
375 | { | |
a3ad94ed | 376 | gold_assert(this->offset() == 0); |
61ba1cf9 ILT |
377 | |
378 | int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; | |
379 | unsigned char* view = of->get_output_view(0, ehdr_size); | |
380 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); | |
381 | ||
382 | unsigned char e_ident[elfcpp::EI_NIDENT]; | |
383 | memset(e_ident, 0, elfcpp::EI_NIDENT); | |
384 | e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0; | |
385 | e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1; | |
386 | e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2; | |
387 | e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3; | |
388 | if (size == 32) | |
389 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32; | |
390 | else if (size == 64) | |
391 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64; | |
392 | else | |
a3ad94ed | 393 | gold_unreachable(); |
61ba1cf9 ILT |
394 | e_ident[elfcpp::EI_DATA] = (big_endian |
395 | ? elfcpp::ELFDATA2MSB | |
396 | : elfcpp::ELFDATA2LSB); | |
397 | e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; | |
398 | // FIXME: Some targets may need to set EI_OSABI and EI_ABIVERSION. | |
399 | oehdr.put_e_ident(e_ident); | |
400 | ||
401 | elfcpp::ET e_type; | |
402 | // FIXME: ET_DYN. | |
7e1edb90 | 403 | if (parameters->output_is_object()) |
61ba1cf9 ILT |
404 | e_type = elfcpp::ET_REL; |
405 | else | |
406 | e_type = elfcpp::ET_EXEC; | |
407 | oehdr.put_e_type(e_type); | |
408 | ||
409 | oehdr.put_e_machine(this->target_->machine_code()); | |
410 | oehdr.put_e_version(elfcpp::EV_CURRENT); | |
411 | ||
ead1e424 | 412 | // FIXME: Need to support -e, and target specific entry symbol. |
61ba1cf9 ILT |
413 | Symbol* sym = this->symtab_->lookup("_start"); |
414 | typename Sized_symbol<size>::Value_type v; | |
415 | if (sym == NULL) | |
416 | v = 0; | |
417 | else | |
418 | { | |
419 | Sized_symbol<size>* ssym; | |
593f47df | 420 | ssym = this->symtab_->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d | 421 | sym SELECT_SIZE(size)); |
61ba1cf9 ILT |
422 | v = ssym->value(); |
423 | } | |
424 | oehdr.put_e_entry(v); | |
425 | ||
426 | oehdr.put_e_phoff(this->segment_header_->offset()); | |
427 | oehdr.put_e_shoff(this->section_header_->offset()); | |
428 | ||
429 | // FIXME: The target needs to set the flags. | |
430 | oehdr.put_e_flags(0); | |
431 | ||
432 | oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size); | |
433 | oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size); | |
434 | oehdr.put_e_phnum(this->segment_header_->data_size() | |
435 | / elfcpp::Elf_sizes<size>::phdr_size); | |
436 | oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size); | |
437 | oehdr.put_e_shnum(this->section_header_->data_size() | |
438 | / elfcpp::Elf_sizes<size>::shdr_size); | |
ead1e424 | 439 | oehdr.put_e_shstrndx(this->shstrtab_->out_shndx()); |
61ba1cf9 ILT |
440 | |
441 | of->write_output_view(0, ehdr_size, view); | |
54dc6425 ILT |
442 | } |
443 | ||
dbe717ef ILT |
444 | // Output_data_const methods. |
445 | ||
446 | void | |
a3ad94ed | 447 | Output_data_const::do_write(Output_file* of) |
dbe717ef | 448 | { |
a3ad94ed ILT |
449 | of->write(this->offset(), this->data_.data(), this->data_.size()); |
450 | } | |
451 | ||
452 | // Output_data_const_buffer methods. | |
453 | ||
454 | void | |
455 | Output_data_const_buffer::do_write(Output_file* of) | |
456 | { | |
457 | of->write(this->offset(), this->p_, this->data_size()); | |
dbe717ef ILT |
458 | } |
459 | ||
460 | // Output_section_data methods. | |
461 | ||
16649710 ILT |
462 | // Record the output section, and set the entry size and such. |
463 | ||
464 | void | |
465 | Output_section_data::set_output_section(Output_section* os) | |
466 | { | |
467 | gold_assert(this->output_section_ == NULL); | |
468 | this->output_section_ = os; | |
469 | this->do_adjust_output_section(os); | |
470 | } | |
471 | ||
472 | // Return the section index of the output section. | |
473 | ||
dbe717ef ILT |
474 | unsigned int |
475 | Output_section_data::do_out_shndx() const | |
476 | { | |
a3ad94ed | 477 | gold_assert(this->output_section_ != NULL); |
dbe717ef ILT |
478 | return this->output_section_->out_shndx(); |
479 | } | |
480 | ||
a3ad94ed ILT |
481 | // Output_data_strtab methods. |
482 | ||
483 | // Set the address. We don't actually care about the address, but we | |
484 | // do set our final size. | |
485 | ||
486 | void | |
487 | Output_data_strtab::do_set_address(uint64_t, off_t) | |
488 | { | |
489 | this->strtab_->set_string_offsets(); | |
490 | this->set_data_size(this->strtab_->get_strtab_size()); | |
491 | } | |
492 | ||
493 | // Write out a string table. | |
494 | ||
495 | void | |
496 | Output_data_strtab::do_write(Output_file* of) | |
497 | { | |
498 | this->strtab_->write(of, this->offset()); | |
499 | } | |
500 | ||
c06b7b0b ILT |
501 | // Output_reloc methods. |
502 | ||
503 | // Get the symbol index of a relocation. | |
504 | ||
505 | template<bool dynamic, int size, bool big_endian> | |
506 | unsigned int | |
507 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index() | |
508 | const | |
509 | { | |
510 | unsigned int index; | |
511 | switch (this->local_sym_index_) | |
512 | { | |
513 | case INVALID_CODE: | |
a3ad94ed | 514 | gold_unreachable(); |
c06b7b0b ILT |
515 | |
516 | case GSYM_CODE: | |
5a6f7e2d | 517 | if (this->u1_.gsym == NULL) |
c06b7b0b ILT |
518 | index = 0; |
519 | else if (dynamic) | |
5a6f7e2d | 520 | index = this->u1_.gsym->dynsym_index(); |
c06b7b0b | 521 | else |
5a6f7e2d | 522 | index = this->u1_.gsym->symtab_index(); |
c06b7b0b ILT |
523 | break; |
524 | ||
525 | case SECTION_CODE: | |
526 | if (dynamic) | |
5a6f7e2d | 527 | index = this->u1_.os->dynsym_index(); |
c06b7b0b | 528 | else |
5a6f7e2d | 529 | index = this->u1_.os->symtab_index(); |
c06b7b0b ILT |
530 | break; |
531 | ||
532 | default: | |
533 | if (dynamic) | |
534 | { | |
535 | // FIXME: It seems that some targets may need to generate | |
536 | // dynamic relocations against local symbols for some | |
537 | // reasons. This will have to be addressed at some point. | |
a3ad94ed | 538 | gold_unreachable(); |
c06b7b0b ILT |
539 | } |
540 | else | |
5a6f7e2d | 541 | index = this->u1_.relobj->symtab_index(this->local_sym_index_); |
c06b7b0b ILT |
542 | break; |
543 | } | |
a3ad94ed | 544 | gold_assert(index != -1U); |
c06b7b0b ILT |
545 | return index; |
546 | } | |
547 | ||
548 | // Write out the offset and info fields of a Rel or Rela relocation | |
549 | // entry. | |
550 | ||
551 | template<bool dynamic, int size, bool big_endian> | |
552 | template<typename Write_rel> | |
553 | void | |
554 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel( | |
555 | Write_rel* wr) const | |
556 | { | |
a3ad94ed | 557 | Address address = this->address_; |
5a6f7e2d ILT |
558 | if (this->shndx_ != INVALID_CODE) |
559 | { | |
560 | off_t off; | |
561 | Output_section* os = this->u2_.relobj->output_section(this->shndx_, | |
562 | &off); | |
563 | gold_assert(os != NULL); | |
564 | address += os->address() + off; | |
565 | } | |
566 | else if (this->u2_.od != NULL) | |
567 | address += this->u2_.od->address(); | |
a3ad94ed | 568 | wr->put_r_offset(address); |
c06b7b0b ILT |
569 | wr->put_r_info(elfcpp::elf_r_info<size>(this->get_symbol_index(), |
570 | this->type_)); | |
571 | } | |
572 | ||
573 | // Write out a Rel relocation. | |
574 | ||
575 | template<bool dynamic, int size, bool big_endian> | |
576 | void | |
577 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write( | |
578 | unsigned char* pov) const | |
579 | { | |
580 | elfcpp::Rel_write<size, big_endian> orel(pov); | |
581 | this->write_rel(&orel); | |
582 | } | |
583 | ||
584 | // Write out a Rela relocation. | |
585 | ||
586 | template<bool dynamic, int size, bool big_endian> | |
587 | void | |
588 | Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write( | |
589 | unsigned char* pov) const | |
590 | { | |
591 | elfcpp::Rela_write<size, big_endian> orel(pov); | |
592 | this->rel_.write_rel(&orel); | |
593 | orel.put_r_addend(this->addend_); | |
594 | } | |
595 | ||
596 | // Output_data_reloc_base methods. | |
597 | ||
16649710 ILT |
598 | // Adjust the output section. |
599 | ||
600 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
601 | void | |
602 | Output_data_reloc_base<sh_type, dynamic, size, big_endian> | |
603 | ::do_adjust_output_section(Output_section* os) | |
604 | { | |
605 | if (sh_type == elfcpp::SHT_REL) | |
606 | os->set_entsize(elfcpp::Elf_sizes<size>::rel_size); | |
607 | else if (sh_type == elfcpp::SHT_RELA) | |
608 | os->set_entsize(elfcpp::Elf_sizes<size>::rela_size); | |
609 | else | |
610 | gold_unreachable(); | |
611 | if (dynamic) | |
612 | os->set_should_link_to_dynsym(); | |
613 | else | |
614 | os->set_should_link_to_symtab(); | |
615 | } | |
616 | ||
c06b7b0b ILT |
617 | // Write out relocation data. |
618 | ||
619 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
620 | void | |
621 | Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write( | |
622 | Output_file* of) | |
623 | { | |
624 | const off_t off = this->offset(); | |
625 | const off_t oview_size = this->data_size(); | |
626 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
627 | ||
628 | unsigned char* pov = oview; | |
629 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
630 | p != this->relocs_.end(); | |
631 | ++p) | |
632 | { | |
633 | p->write(pov); | |
634 | pov += reloc_size; | |
635 | } | |
636 | ||
a3ad94ed | 637 | gold_assert(pov - oview == oview_size); |
c06b7b0b ILT |
638 | |
639 | of->write_output_view(off, oview_size, oview); | |
640 | ||
641 | // We no longer need the relocation entries. | |
642 | this->relocs_.clear(); | |
643 | } | |
644 | ||
dbe717ef | 645 | // Output_data_got::Got_entry methods. |
ead1e424 ILT |
646 | |
647 | // Write out the entry. | |
648 | ||
649 | template<int size, bool big_endian> | |
650 | void | |
7e1edb90 | 651 | Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const |
ead1e424 ILT |
652 | { |
653 | Valtype val = 0; | |
654 | ||
655 | switch (this->local_sym_index_) | |
656 | { | |
657 | case GSYM_CODE: | |
658 | { | |
659 | Symbol* gsym = this->u_.gsym; | |
660 | ||
661 | // If the symbol is resolved locally, we need to write out its | |
662 | // value. Otherwise we just write zero. The target code is | |
663 | // responsible for creating a relocation entry to fill in the | |
664 | // value at runtime. | |
7e1edb90 | 665 | if (gsym->final_value_is_known()) |
ead1e424 ILT |
666 | { |
667 | Sized_symbol<size>* sgsym; | |
668 | // This cast is a bit ugly. We don't want to put a | |
669 | // virtual method in Symbol, because we want Symbol to be | |
670 | // as small as possible. | |
671 | sgsym = static_cast<Sized_symbol<size>*>(gsym); | |
672 | val = sgsym->value(); | |
673 | } | |
674 | } | |
675 | break; | |
676 | ||
677 | case CONSTANT_CODE: | |
678 | val = this->u_.constant; | |
679 | break; | |
680 | ||
681 | default: | |
e727fa71 ILT |
682 | val = this->u_.object->local_symbol_value(this->local_sym_index_); |
683 | break; | |
ead1e424 ILT |
684 | } |
685 | ||
a3ad94ed | 686 | elfcpp::Swap<size, big_endian>::writeval(pov, val); |
ead1e424 ILT |
687 | } |
688 | ||
dbe717ef | 689 | // Output_data_got methods. |
ead1e424 | 690 | |
dbe717ef ILT |
691 | // Add an entry for a global symbol to the GOT. This returns true if |
692 | // this is a new GOT entry, false if the symbol already had a GOT | |
693 | // entry. | |
694 | ||
695 | template<int size, bool big_endian> | |
696 | bool | |
697 | Output_data_got<size, big_endian>::add_global(Symbol* gsym) | |
ead1e424 | 698 | { |
dbe717ef ILT |
699 | if (gsym->has_got_offset()) |
700 | return false; | |
ead1e424 | 701 | |
dbe717ef ILT |
702 | this->entries_.push_back(Got_entry(gsym)); |
703 | this->set_got_size(); | |
704 | gsym->set_got_offset(this->last_got_offset()); | |
705 | return true; | |
706 | } | |
ead1e424 | 707 | |
e727fa71 ILT |
708 | // Add an entry for a local symbol to the GOT. This returns true if |
709 | // this is a new GOT entry, false if the symbol already has a GOT | |
710 | // entry. | |
711 | ||
712 | template<int size, bool big_endian> | |
713 | bool | |
714 | Output_data_got<size, big_endian>::add_local( | |
715 | Sized_relobj<size, big_endian>* object, | |
716 | unsigned int symndx) | |
717 | { | |
718 | if (object->local_has_got_offset(symndx)) | |
719 | return false; | |
720 | this->entries_.push_back(Got_entry(object, symndx)); | |
721 | this->set_got_size(); | |
722 | object->set_local_got_offset(symndx, this->last_got_offset()); | |
723 | return true; | |
724 | } | |
725 | ||
ead1e424 ILT |
726 | // Write out the GOT. |
727 | ||
728 | template<int size, bool big_endian> | |
729 | void | |
dbe717ef | 730 | Output_data_got<size, big_endian>::do_write(Output_file* of) |
ead1e424 ILT |
731 | { |
732 | const int add = size / 8; | |
733 | ||
734 | const off_t off = this->offset(); | |
c06b7b0b | 735 | const off_t oview_size = this->data_size(); |
ead1e424 ILT |
736 | unsigned char* const oview = of->get_output_view(off, oview_size); |
737 | ||
738 | unsigned char* pov = oview; | |
739 | for (typename Got_entries::const_iterator p = this->entries_.begin(); | |
740 | p != this->entries_.end(); | |
741 | ++p) | |
742 | { | |
7e1edb90 | 743 | p->write(pov); |
ead1e424 ILT |
744 | pov += add; |
745 | } | |
746 | ||
a3ad94ed | 747 | gold_assert(pov - oview == oview_size); |
c06b7b0b | 748 | |
ead1e424 ILT |
749 | of->write_output_view(off, oview_size, oview); |
750 | ||
751 | // We no longer need the GOT entries. | |
752 | this->entries_.clear(); | |
753 | } | |
754 | ||
a3ad94ed ILT |
755 | // Output_data_dynamic::Dynamic_entry methods. |
756 | ||
757 | // Write out the entry. | |
758 | ||
759 | template<int size, bool big_endian> | |
760 | void | |
761 | Output_data_dynamic::Dynamic_entry::write( | |
762 | unsigned char* pov, | |
1ddbd1e6 ILT |
763 | const Stringpool* pool |
764 | ACCEPT_SIZE_ENDIAN) const | |
a3ad94ed ILT |
765 | { |
766 | typename elfcpp::Elf_types<size>::Elf_WXword val; | |
767 | switch (this->classification_) | |
768 | { | |
769 | case DYNAMIC_NUMBER: | |
770 | val = this->u_.val; | |
771 | break; | |
772 | ||
773 | case DYNAMIC_SECTION_ADDRESS: | |
16649710 | 774 | val = this->u_.od->address(); |
a3ad94ed ILT |
775 | break; |
776 | ||
777 | case DYNAMIC_SECTION_SIZE: | |
16649710 | 778 | val = this->u_.od->data_size(); |
a3ad94ed ILT |
779 | break; |
780 | ||
781 | case DYNAMIC_SYMBOL: | |
782 | { | |
16649710 ILT |
783 | const Sized_symbol<size>* s = |
784 | static_cast<const Sized_symbol<size>*>(this->u_.sym); | |
a3ad94ed ILT |
785 | val = s->value(); |
786 | } | |
787 | break; | |
788 | ||
789 | case DYNAMIC_STRING: | |
790 | val = pool->get_offset(this->u_.str); | |
791 | break; | |
792 | ||
793 | default: | |
794 | gold_unreachable(); | |
795 | } | |
796 | ||
797 | elfcpp::Dyn_write<size, big_endian> dw(pov); | |
798 | dw.put_d_tag(this->tag_); | |
799 | dw.put_d_val(val); | |
800 | } | |
801 | ||
802 | // Output_data_dynamic methods. | |
803 | ||
16649710 ILT |
804 | // Adjust the output section to set the entry size. |
805 | ||
806 | void | |
807 | Output_data_dynamic::do_adjust_output_section(Output_section* os) | |
808 | { | |
9025d29d | 809 | if (parameters->get_size() == 32) |
16649710 | 810 | os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size); |
9025d29d | 811 | else if (parameters->get_size() == 64) |
16649710 ILT |
812 | os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size); |
813 | else | |
814 | gold_unreachable(); | |
815 | } | |
816 | ||
a3ad94ed ILT |
817 | // Set the final data size. |
818 | ||
819 | void | |
820 | Output_data_dynamic::do_set_address(uint64_t, off_t) | |
821 | { | |
822 | // Add the terminating entry. | |
823 | this->add_constant(elfcpp::DT_NULL, 0); | |
824 | ||
825 | int dyn_size; | |
9025d29d | 826 | if (parameters->get_size() == 32) |
a3ad94ed | 827 | dyn_size = elfcpp::Elf_sizes<32>::dyn_size; |
9025d29d | 828 | else if (parameters->get_size() == 64) |
a3ad94ed ILT |
829 | dyn_size = elfcpp::Elf_sizes<64>::dyn_size; |
830 | else | |
831 | gold_unreachable(); | |
832 | this->set_data_size(this->entries_.size() * dyn_size); | |
833 | } | |
834 | ||
835 | // Write out the dynamic entries. | |
836 | ||
837 | void | |
838 | Output_data_dynamic::do_write(Output_file* of) | |
839 | { | |
9025d29d | 840 | if (parameters->get_size() == 32) |
a3ad94ed | 841 | { |
9025d29d ILT |
842 | if (parameters->is_big_endian()) |
843 | { | |
844 | #ifdef HAVE_TARGET_32_BIG | |
845 | this->sized_write<32, true>(of); | |
846 | #else | |
847 | gold_unreachable(); | |
848 | #endif | |
849 | } | |
a3ad94ed | 850 | else |
9025d29d ILT |
851 | { |
852 | #ifdef HAVE_TARGET_32_LITTLE | |
853 | this->sized_write<32, false>(of); | |
854 | #else | |
855 | gold_unreachable(); | |
856 | #endif | |
857 | } | |
a3ad94ed | 858 | } |
9025d29d | 859 | else if (parameters->get_size() == 64) |
a3ad94ed | 860 | { |
9025d29d ILT |
861 | if (parameters->is_big_endian()) |
862 | { | |
863 | #ifdef HAVE_TARGET_64_BIG | |
864 | this->sized_write<64, true>(of); | |
865 | #else | |
866 | gold_unreachable(); | |
867 | #endif | |
868 | } | |
a3ad94ed | 869 | else |
9025d29d ILT |
870 | { |
871 | #ifdef HAVE_TARGET_64_LITTLE | |
872 | this->sized_write<64, false>(of); | |
873 | #else | |
874 | gold_unreachable(); | |
875 | #endif | |
876 | } | |
a3ad94ed ILT |
877 | } |
878 | else | |
879 | gold_unreachable(); | |
880 | } | |
881 | ||
882 | template<int size, bool big_endian> | |
883 | void | |
884 | Output_data_dynamic::sized_write(Output_file* of) | |
885 | { | |
886 | const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
887 | ||
888 | const off_t offset = this->offset(); | |
889 | const off_t oview_size = this->data_size(); | |
890 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
891 | ||
892 | unsigned char* pov = oview; | |
893 | for (typename Dynamic_entries::const_iterator p = this->entries_.begin(); | |
894 | p != this->entries_.end(); | |
895 | ++p) | |
896 | { | |
1ddbd1e6 ILT |
897 | p->write SELECT_SIZE_ENDIAN_NAME(size, big_endian)( |
898 | pov, this->pool_ SELECT_SIZE_ENDIAN(size, big_endian)); | |
a3ad94ed ILT |
899 | pov += dyn_size; |
900 | } | |
901 | ||
902 | gold_assert(pov - oview == oview_size); | |
903 | ||
904 | of->write_output_view(offset, oview_size, oview); | |
905 | ||
906 | // We no longer need the dynamic entries. | |
907 | this->entries_.clear(); | |
908 | } | |
909 | ||
ead1e424 ILT |
910 | // Output_section::Input_section methods. |
911 | ||
912 | // Return the data size. For an input section we store the size here. | |
913 | // For an Output_section_data, we have to ask it for the size. | |
914 | ||
915 | off_t | |
916 | Output_section::Input_section::data_size() const | |
917 | { | |
918 | if (this->is_input_section()) | |
b8e6aad9 | 919 | return this->u1_.data_size; |
ead1e424 | 920 | else |
b8e6aad9 | 921 | return this->u2_.posd->data_size(); |
ead1e424 ILT |
922 | } |
923 | ||
924 | // Set the address and file offset. | |
925 | ||
926 | void | |
927 | Output_section::Input_section::set_address(uint64_t addr, off_t off, | |
928 | off_t secoff) | |
929 | { | |
930 | if (this->is_input_section()) | |
b8e6aad9 | 931 | this->u2_.object->set_section_offset(this->shndx_, off - secoff); |
ead1e424 | 932 | else |
b8e6aad9 ILT |
933 | this->u2_.posd->set_address(addr, off); |
934 | } | |
935 | ||
936 | // Try to turn an input address into an output address. | |
937 | ||
938 | bool | |
939 | Output_section::Input_section::output_address(const Relobj* object, | |
940 | unsigned int shndx, | |
941 | off_t offset, | |
942 | uint64_t output_section_address, | |
943 | uint64_t *poutput) const | |
944 | { | |
945 | if (!this->is_input_section()) | |
946 | return this->u2_.posd->output_address(object, shndx, offset, | |
947 | output_section_address, poutput); | |
948 | else | |
949 | { | |
9d7094e8 ILT |
950 | if (this->shndx_ != shndx |
951 | || this->u2_.object != object) | |
b8e6aad9 ILT |
952 | return false; |
953 | off_t output_offset; | |
954 | Output_section* os = object->output_section(shndx, &output_offset); | |
955 | gold_assert(os != NULL); | |
956 | *poutput = output_section_address + output_offset + offset; | |
957 | return true; | |
958 | } | |
ead1e424 ILT |
959 | } |
960 | ||
961 | // Write out the data. We don't have to do anything for an input | |
962 | // section--they are handled via Object::relocate--but this is where | |
963 | // we write out the data for an Output_section_data. | |
964 | ||
965 | void | |
966 | Output_section::Input_section::write(Output_file* of) | |
967 | { | |
968 | if (!this->is_input_section()) | |
b8e6aad9 | 969 | this->u2_.posd->write(of); |
ead1e424 ILT |
970 | } |
971 | ||
a2fb1b05 ILT |
972 | // Output_section methods. |
973 | ||
974 | // Construct an Output_section. NAME will point into a Stringpool. | |
975 | ||
976 | Output_section::Output_section(const char* name, elfcpp::Elf_Word type, | |
b8e6aad9 | 977 | elfcpp::Elf_Xword flags) |
a2fb1b05 | 978 | : name_(name), |
a2fb1b05 ILT |
979 | addralign_(0), |
980 | entsize_(0), | |
16649710 | 981 | link_section_(NULL), |
a2fb1b05 | 982 | link_(0), |
16649710 | 983 | info_section_(NULL), |
a2fb1b05 ILT |
984 | info_(0), |
985 | type_(type), | |
61ba1cf9 | 986 | flags_(flags), |
ead1e424 | 987 | out_shndx_(0), |
c06b7b0b ILT |
988 | symtab_index_(0), |
989 | dynsym_index_(0), | |
ead1e424 ILT |
990 | input_sections_(), |
991 | first_input_offset_(0), | |
c51e6221 | 992 | fills_(), |
a3ad94ed | 993 | needs_symtab_index_(false), |
16649710 ILT |
994 | needs_dynsym_index_(false), |
995 | should_link_to_symtab_(false), | |
996 | should_link_to_dynsym_(false) | |
a2fb1b05 ILT |
997 | { |
998 | } | |
999 | ||
54dc6425 ILT |
1000 | Output_section::~Output_section() |
1001 | { | |
1002 | } | |
1003 | ||
16649710 ILT |
1004 | // Set the entry size. |
1005 | ||
1006 | void | |
1007 | Output_section::set_entsize(uint64_t v) | |
1008 | { | |
1009 | if (this->entsize_ == 0) | |
1010 | this->entsize_ = v; | |
1011 | else | |
1012 | gold_assert(this->entsize_ == v); | |
1013 | } | |
1014 | ||
ead1e424 ILT |
1015 | // Add the input section SHNDX, with header SHDR, named SECNAME, in |
1016 | // OBJECT, to the Output_section. Return the offset of the input | |
1017 | // section within the output section. We don't always keep track of | |
a2fb1b05 ILT |
1018 | // input sections for an Output_section. Instead, each Object keeps |
1019 | // track of the Output_section for each of its input sections. | |
1020 | ||
1021 | template<int size, bool big_endian> | |
1022 | off_t | |
f6ce93d6 | 1023 | Output_section::add_input_section(Relobj* object, unsigned int shndx, |
ead1e424 | 1024 | const char* secname, |
a2fb1b05 ILT |
1025 | const elfcpp::Shdr<size, big_endian>& shdr) |
1026 | { | |
1027 | elfcpp::Elf_Xword addralign = shdr.get_sh_addralign(); | |
1028 | if ((addralign & (addralign - 1)) != 0) | |
1029 | { | |
1030 | fprintf(stderr, _("%s: %s: invalid alignment %lu for section \"%s\"\n"), | |
1031 | program_name, object->name().c_str(), | |
1032 | static_cast<unsigned long>(addralign), secname); | |
1033 | gold_exit(false); | |
1034 | } | |
a2fb1b05 ILT |
1035 | |
1036 | if (addralign > this->addralign_) | |
1037 | this->addralign_ = addralign; | |
1038 | ||
b8e6aad9 ILT |
1039 | // If this is a SHF_MERGE section, we pass all the input sections to |
1040 | // a Output_data_merge. | |
1041 | if ((shdr.get_sh_flags() & elfcpp::SHF_MERGE) != 0) | |
1042 | { | |
1043 | if (this->add_merge_input_section(object, shndx, shdr.get_sh_flags(), | |
1044 | shdr.get_sh_entsize(), | |
1045 | addralign)) | |
1046 | { | |
1047 | // Tell the relocation routines that they need to call the | |
1048 | // output_address method to determine the final address. | |
1049 | return -1; | |
1050 | } | |
1051 | } | |
1052 | ||
c51e6221 ILT |
1053 | off_t offset_in_section = this->data_size(); |
1054 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
1055 | addralign); | |
1056 | ||
1057 | if (aligned_offset_in_section > offset_in_section | |
1058 | && (shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0 | |
1059 | && object->target()->has_code_fill()) | |
1060 | { | |
1061 | // We need to add some fill data. Using fill_list_ when | |
1062 | // possible is an optimization, since we will often have fill | |
1063 | // sections without input sections. | |
1064 | off_t fill_len = aligned_offset_in_section - offset_in_section; | |
1065 | if (this->input_sections_.empty()) | |
1066 | this->fills_.push_back(Fill(offset_in_section, fill_len)); | |
1067 | else | |
1068 | { | |
1069 | // FIXME: When relaxing, the size needs to adjust to | |
1070 | // maintain a constant alignment. | |
1071 | std::string fill_data(object->target()->code_fill(fill_len)); | |
1072 | Output_data_const* odc = new Output_data_const(fill_data, 1); | |
1073 | this->input_sections_.push_back(Input_section(odc)); | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | this->set_data_size(aligned_offset_in_section + shdr.get_sh_size()); | |
a2fb1b05 | 1078 | |
ead1e424 ILT |
1079 | // We need to keep track of this section if we are already keeping |
1080 | // track of sections, or if we are relaxing. FIXME: Add test for | |
1081 | // relaxing. | |
c51e6221 | 1082 | if (!this->input_sections_.empty()) |
ead1e424 ILT |
1083 | this->input_sections_.push_back(Input_section(object, shndx, |
1084 | shdr.get_sh_size(), | |
1085 | addralign)); | |
54dc6425 | 1086 | |
c51e6221 | 1087 | return aligned_offset_in_section; |
61ba1cf9 ILT |
1088 | } |
1089 | ||
ead1e424 ILT |
1090 | // Add arbitrary data to an output section. |
1091 | ||
1092 | void | |
1093 | Output_section::add_output_section_data(Output_section_data* posd) | |
1094 | { | |
b8e6aad9 ILT |
1095 | Input_section inp(posd); |
1096 | this->add_output_section_data(&inp); | |
1097 | } | |
1098 | ||
1099 | // Add arbitrary data to an output section by Input_section. | |
c06b7b0b | 1100 | |
b8e6aad9 ILT |
1101 | void |
1102 | Output_section::add_output_section_data(Input_section* inp) | |
1103 | { | |
ead1e424 ILT |
1104 | if (this->input_sections_.empty()) |
1105 | this->first_input_offset_ = this->data_size(); | |
c06b7b0b | 1106 | |
b8e6aad9 | 1107 | this->input_sections_.push_back(*inp); |
c06b7b0b | 1108 | |
b8e6aad9 | 1109 | uint64_t addralign = inp->addralign(); |
ead1e424 ILT |
1110 | if (addralign > this->addralign_) |
1111 | this->addralign_ = addralign; | |
c06b7b0b | 1112 | |
b8e6aad9 ILT |
1113 | inp->set_output_section(this); |
1114 | } | |
1115 | ||
1116 | // Add a merge section to an output section. | |
1117 | ||
1118 | void | |
1119 | Output_section::add_output_merge_section(Output_section_data* posd, | |
1120 | bool is_string, uint64_t entsize) | |
1121 | { | |
1122 | Input_section inp(posd, is_string, entsize); | |
1123 | this->add_output_section_data(&inp); | |
1124 | } | |
1125 | ||
1126 | // Add an input section to a SHF_MERGE section. | |
1127 | ||
1128 | bool | |
1129 | Output_section::add_merge_input_section(Relobj* object, unsigned int shndx, | |
1130 | uint64_t flags, uint64_t entsize, | |
1131 | uint64_t addralign) | |
1132 | { | |
1133 | // We only merge constants if the alignment is not more than the | |
1134 | // entry size. This could be handled, but it's unusual. | |
1135 | if (addralign > entsize) | |
1136 | return false; | |
1137 | ||
1138 | bool is_string = (flags & elfcpp::SHF_STRINGS) != 0; | |
1139 | Input_section_list::iterator p; | |
1140 | for (p = this->input_sections_.begin(); | |
1141 | p != this->input_sections_.end(); | |
1142 | ++p) | |
1143 | if (p->is_merge_section(is_string, entsize)) | |
1144 | break; | |
1145 | ||
1146 | // We handle the actual constant merging in Output_merge_data or | |
1147 | // Output_merge_string_data. | |
1148 | if (p != this->input_sections_.end()) | |
1149 | p->add_input_section(object, shndx); | |
1150 | else | |
1151 | { | |
1152 | Output_section_data* posd; | |
1153 | if (!is_string) | |
1154 | posd = new Output_merge_data(entsize); | |
1155 | else if (entsize == 1) | |
1156 | posd = new Output_merge_string<char>(); | |
1157 | else if (entsize == 2) | |
1158 | posd = new Output_merge_string<uint16_t>(); | |
1159 | else if (entsize == 4) | |
1160 | posd = new Output_merge_string<uint32_t>(); | |
1161 | else | |
1162 | return false; | |
1163 | ||
1164 | this->add_output_merge_section(posd, is_string, entsize); | |
1165 | posd->add_input_section(object, shndx); | |
1166 | } | |
1167 | ||
1168 | return true; | |
1169 | } | |
1170 | ||
1171 | // Return the output virtual address of OFFSET relative to the start | |
1172 | // of input section SHNDX in object OBJECT. | |
1173 | ||
1174 | uint64_t | |
1175 | Output_section::output_address(const Relobj* object, unsigned int shndx, | |
1176 | off_t offset) const | |
1177 | { | |
1178 | uint64_t addr = this->address() + this->first_input_offset_; | |
1179 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1180 | p != this->input_sections_.end(); | |
1181 | ++p) | |
1182 | { | |
1183 | addr = align_address(addr, p->addralign()); | |
1184 | uint64_t output; | |
1185 | if (p->output_address(object, shndx, offset, addr, &output)) | |
1186 | return output; | |
1187 | addr += p->data_size(); | |
1188 | } | |
1189 | ||
1190 | // If we get here, it means that we don't know the mapping for this | |
1191 | // input section. This might happen in principle if | |
1192 | // add_input_section were called before add_output_section_data. | |
1193 | // But it should never actually happen. | |
1194 | ||
1195 | gold_unreachable(); | |
ead1e424 ILT |
1196 | } |
1197 | ||
1198 | // Set the address of an Output_section. This is where we handle | |
1199 | // setting the addresses of any Output_section_data objects. | |
1200 | ||
1201 | void | |
1202 | Output_section::do_set_address(uint64_t address, off_t startoff) | |
1203 | { | |
1204 | if (this->input_sections_.empty()) | |
1205 | return; | |
1206 | ||
1207 | off_t off = startoff + this->first_input_offset_; | |
1208 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
1209 | p != this->input_sections_.end(); | |
1210 | ++p) | |
1211 | { | |
1212 | off = align_address(off, p->addralign()); | |
1213 | p->set_address(address + (off - startoff), off, startoff); | |
1214 | off += p->data_size(); | |
1215 | } | |
1216 | ||
1217 | this->set_data_size(off - startoff); | |
1218 | } | |
1219 | ||
61ba1cf9 ILT |
1220 | // Write the section header to *OSHDR. |
1221 | ||
1222 | template<int size, bool big_endian> | |
1223 | void | |
16649710 ILT |
1224 | Output_section::write_header(const Layout* layout, |
1225 | const Stringpool* secnamepool, | |
61ba1cf9 ILT |
1226 | elfcpp::Shdr_write<size, big_endian>* oshdr) const |
1227 | { | |
1228 | oshdr->put_sh_name(secnamepool->get_offset(this->name_)); | |
1229 | oshdr->put_sh_type(this->type_); | |
1230 | oshdr->put_sh_flags(this->flags_); | |
1231 | oshdr->put_sh_addr(this->address()); | |
1232 | oshdr->put_sh_offset(this->offset()); | |
1233 | oshdr->put_sh_size(this->data_size()); | |
16649710 ILT |
1234 | if (this->link_section_ != NULL) |
1235 | oshdr->put_sh_link(this->link_section_->out_shndx()); | |
1236 | else if (this->should_link_to_symtab_) | |
1237 | oshdr->put_sh_link(layout->symtab_section()->out_shndx()); | |
1238 | else if (this->should_link_to_dynsym_) | |
1239 | oshdr->put_sh_link(layout->dynsym_section()->out_shndx()); | |
1240 | else | |
1241 | oshdr->put_sh_link(this->link_); | |
1242 | if (this->info_section_ != NULL) | |
1243 | oshdr->put_sh_info(this->info_section_->out_shndx()); | |
1244 | else | |
1245 | oshdr->put_sh_info(this->info_); | |
61ba1cf9 ILT |
1246 | oshdr->put_sh_addralign(this->addralign_); |
1247 | oshdr->put_sh_entsize(this->entsize_); | |
a2fb1b05 ILT |
1248 | } |
1249 | ||
ead1e424 ILT |
1250 | // Write out the data. For input sections the data is written out by |
1251 | // Object::relocate, but we have to handle Output_section_data objects | |
1252 | // here. | |
1253 | ||
1254 | void | |
1255 | Output_section::do_write(Output_file* of) | |
1256 | { | |
c51e6221 ILT |
1257 | off_t output_section_file_offset = this->offset(); |
1258 | for (Fill_list::iterator p = this->fills_.begin(); | |
1259 | p != this->fills_.end(); | |
1260 | ++p) | |
1261 | { | |
1262 | std::string fill_data(of->target()->code_fill(p->length())); | |
1263 | of->write(output_section_file_offset + p->section_offset(), | |
1264 | fill_data.data(), fill_data.size()); | |
1265 | } | |
1266 | ||
ead1e424 ILT |
1267 | for (Input_section_list::iterator p = this->input_sections_.begin(); |
1268 | p != this->input_sections_.end(); | |
1269 | ++p) | |
1270 | p->write(of); | |
1271 | } | |
1272 | ||
a2fb1b05 ILT |
1273 | // Output segment methods. |
1274 | ||
1275 | Output_segment::Output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags) | |
54dc6425 | 1276 | : output_data_(), |
75f65a3e | 1277 | output_bss_(), |
a2fb1b05 ILT |
1278 | vaddr_(0), |
1279 | paddr_(0), | |
1280 | memsz_(0), | |
1281 | align_(0), | |
1282 | offset_(0), | |
1283 | filesz_(0), | |
1284 | type_(type), | |
ead1e424 ILT |
1285 | flags_(flags), |
1286 | is_align_known_(false) | |
a2fb1b05 ILT |
1287 | { |
1288 | } | |
1289 | ||
1290 | // Add an Output_section to an Output_segment. | |
1291 | ||
1292 | void | |
75f65a3e | 1293 | Output_segment::add_output_section(Output_section* os, |
dbe717ef ILT |
1294 | elfcpp::Elf_Word seg_flags, |
1295 | bool front) | |
a2fb1b05 | 1296 | { |
a3ad94ed ILT |
1297 | gold_assert((os->flags() & elfcpp::SHF_ALLOC) != 0); |
1298 | gold_assert(!this->is_align_known_); | |
75f65a3e | 1299 | |
ead1e424 | 1300 | // Update the segment flags. |
75f65a3e | 1301 | this->flags_ |= seg_flags; |
75f65a3e ILT |
1302 | |
1303 | Output_segment::Output_data_list* pdl; | |
1304 | if (os->type() == elfcpp::SHT_NOBITS) | |
1305 | pdl = &this->output_bss_; | |
1306 | else | |
1307 | pdl = &this->output_data_; | |
54dc6425 | 1308 | |
a2fb1b05 ILT |
1309 | // So that PT_NOTE segments will work correctly, we need to ensure |
1310 | // that all SHT_NOTE sections are adjacent. This will normally | |
1311 | // happen automatically, because all the SHT_NOTE input sections | |
1312 | // will wind up in the same output section. However, it is possible | |
1313 | // for multiple SHT_NOTE input sections to have different section | |
1314 | // flags, and thus be in different output sections, but for the | |
1315 | // different section flags to map into the same segment flags and | |
1316 | // thus the same output segment. | |
54dc6425 ILT |
1317 | |
1318 | // Note that while there may be many input sections in an output | |
1319 | // section, there are normally only a few output sections in an | |
1320 | // output segment. This loop is expected to be fast. | |
1321 | ||
61ba1cf9 | 1322 | if (os->type() == elfcpp::SHT_NOTE && !pdl->empty()) |
a2fb1b05 | 1323 | { |
a3ad94ed | 1324 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 1325 | do |
54dc6425 | 1326 | { |
75f65a3e | 1327 | --p; |
54dc6425 ILT |
1328 | if ((*p)->is_section_type(elfcpp::SHT_NOTE)) |
1329 | { | |
dbe717ef | 1330 | // We don't worry about the FRONT parameter. |
54dc6425 | 1331 | ++p; |
75f65a3e | 1332 | pdl->insert(p, os); |
54dc6425 ILT |
1333 | return; |
1334 | } | |
1335 | } | |
75f65a3e | 1336 | while (p != pdl->begin()); |
54dc6425 ILT |
1337 | } |
1338 | ||
1339 | // Similarly, so that PT_TLS segments will work, we need to group | |
75f65a3e ILT |
1340 | // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special |
1341 | // case: we group the SHF_TLS/SHT_NOBITS sections right after the | |
1342 | // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS | |
1343 | // correctly. | |
61ba1cf9 | 1344 | if ((os->flags() & elfcpp::SHF_TLS) != 0 && !this->output_data_.empty()) |
54dc6425 | 1345 | { |
75f65a3e ILT |
1346 | pdl = &this->output_data_; |
1347 | bool nobits = os->type() == elfcpp::SHT_NOBITS; | |
ead1e424 | 1348 | bool sawtls = false; |
a3ad94ed | 1349 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 1350 | do |
a2fb1b05 | 1351 | { |
75f65a3e | 1352 | --p; |
ead1e424 ILT |
1353 | bool insert; |
1354 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
1355 | { | |
1356 | sawtls = true; | |
1357 | // Put a NOBITS section after the first TLS section. | |
1358 | // But a PROGBITS section after the first TLS/PROGBITS | |
1359 | // section. | |
1360 | insert = nobits || !(*p)->is_section_type(elfcpp::SHT_NOBITS); | |
1361 | } | |
1362 | else | |
1363 | { | |
1364 | // If we've gone past the TLS sections, but we've seen a | |
1365 | // TLS section, then we need to insert this section now. | |
1366 | insert = sawtls; | |
1367 | } | |
1368 | ||
1369 | if (insert) | |
a2fb1b05 | 1370 | { |
dbe717ef | 1371 | // We don't worry about the FRONT parameter. |
a2fb1b05 | 1372 | ++p; |
75f65a3e | 1373 | pdl->insert(p, os); |
a2fb1b05 ILT |
1374 | return; |
1375 | } | |
1376 | } | |
75f65a3e | 1377 | while (p != pdl->begin()); |
ead1e424 | 1378 | |
dbe717ef ILT |
1379 | // There are no TLS sections yet; put this one at the requested |
1380 | // location in the section list. | |
a2fb1b05 ILT |
1381 | } |
1382 | ||
dbe717ef ILT |
1383 | if (front) |
1384 | pdl->push_front(os); | |
1385 | else | |
1386 | pdl->push_back(os); | |
75f65a3e ILT |
1387 | } |
1388 | ||
1389 | // Add an Output_data (which is not an Output_section) to the start of | |
1390 | // a segment. | |
1391 | ||
1392 | void | |
1393 | Output_segment::add_initial_output_data(Output_data* od) | |
1394 | { | |
a3ad94ed | 1395 | gold_assert(!this->is_align_known_); |
75f65a3e ILT |
1396 | this->output_data_.push_front(od); |
1397 | } | |
1398 | ||
1399 | // Return the maximum alignment of the Output_data in Output_segment. | |
ead1e424 | 1400 | // Once we compute this, we prohibit new sections from being added. |
75f65a3e ILT |
1401 | |
1402 | uint64_t | |
ead1e424 | 1403 | Output_segment::addralign() |
75f65a3e | 1404 | { |
ead1e424 ILT |
1405 | if (!this->is_align_known_) |
1406 | { | |
1407 | uint64_t addralign; | |
1408 | ||
1409 | addralign = Output_segment::maximum_alignment(&this->output_data_); | |
1410 | if (addralign > this->align_) | |
1411 | this->align_ = addralign; | |
1412 | ||
1413 | addralign = Output_segment::maximum_alignment(&this->output_bss_); | |
1414 | if (addralign > this->align_) | |
1415 | this->align_ = addralign; | |
1416 | ||
1417 | this->is_align_known_ = true; | |
1418 | } | |
1419 | ||
75f65a3e ILT |
1420 | return this->align_; |
1421 | } | |
1422 | ||
ead1e424 ILT |
1423 | // Return the maximum alignment of a list of Output_data. |
1424 | ||
1425 | uint64_t | |
1426 | Output_segment::maximum_alignment(const Output_data_list* pdl) | |
1427 | { | |
1428 | uint64_t ret = 0; | |
1429 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1430 | p != pdl->end(); | |
1431 | ++p) | |
1432 | { | |
1433 | uint64_t addralign = (*p)->addralign(); | |
1434 | if (addralign > ret) | |
1435 | ret = addralign; | |
1436 | } | |
1437 | return ret; | |
1438 | } | |
1439 | ||
75f65a3e | 1440 | // Set the section addresses for an Output_segment. ADDR is the |
ead1e424 ILT |
1441 | // address and *POFF is the file offset. Set the section indexes |
1442 | // starting with *PSHNDX. Return the address of the immediately | |
1443 | // following segment. Update *POFF and *PSHNDX. | |
75f65a3e ILT |
1444 | |
1445 | uint64_t | |
ead1e424 ILT |
1446 | Output_segment::set_section_addresses(uint64_t addr, off_t* poff, |
1447 | unsigned int* pshndx) | |
75f65a3e | 1448 | { |
a3ad94ed | 1449 | gold_assert(this->type_ == elfcpp::PT_LOAD); |
75f65a3e ILT |
1450 | |
1451 | this->vaddr_ = addr; | |
1452 | this->paddr_ = addr; | |
1453 | ||
1454 | off_t orig_off = *poff; | |
1455 | this->offset_ = orig_off; | |
1456 | ||
ead1e424 ILT |
1457 | *poff = align_address(*poff, this->addralign()); |
1458 | ||
1459 | addr = this->set_section_list_addresses(&this->output_data_, addr, poff, | |
1460 | pshndx); | |
75f65a3e ILT |
1461 | this->filesz_ = *poff - orig_off; |
1462 | ||
1463 | off_t off = *poff; | |
1464 | ||
61ba1cf9 | 1465 | uint64_t ret = this->set_section_list_addresses(&this->output_bss_, addr, |
ead1e424 | 1466 | poff, pshndx); |
75f65a3e ILT |
1467 | this->memsz_ = *poff - orig_off; |
1468 | ||
1469 | // Ignore the file offset adjustments made by the BSS Output_data | |
1470 | // objects. | |
1471 | *poff = off; | |
61ba1cf9 ILT |
1472 | |
1473 | return ret; | |
75f65a3e ILT |
1474 | } |
1475 | ||
b8e6aad9 ILT |
1476 | // Set the addresses and file offsets in a list of Output_data |
1477 | // structures. | |
75f65a3e ILT |
1478 | |
1479 | uint64_t | |
1480 | Output_segment::set_section_list_addresses(Output_data_list* pdl, | |
ead1e424 ILT |
1481 | uint64_t addr, off_t* poff, |
1482 | unsigned int* pshndx) | |
75f65a3e | 1483 | { |
ead1e424 | 1484 | off_t startoff = *poff; |
75f65a3e | 1485 | |
ead1e424 | 1486 | off_t off = startoff; |
75f65a3e ILT |
1487 | for (Output_data_list::iterator p = pdl->begin(); |
1488 | p != pdl->end(); | |
1489 | ++p) | |
1490 | { | |
ead1e424 ILT |
1491 | off = align_address(off, (*p)->addralign()); |
1492 | (*p)->set_address(addr + (off - startoff), off); | |
1493 | ||
1494 | // Unless this is a PT_TLS segment, we want to ignore the size | |
1495 | // of a SHF_TLS/SHT_NOBITS section. Such a section does not | |
1496 | // affect the size of a PT_LOAD segment. | |
1497 | if (this->type_ == elfcpp::PT_TLS | |
1498 | || !(*p)->is_section_flag_set(elfcpp::SHF_TLS) | |
1499 | || !(*p)->is_section_type(elfcpp::SHT_NOBITS)) | |
1500 | off += (*p)->data_size(); | |
75f65a3e | 1501 | |
ead1e424 ILT |
1502 | if ((*p)->is_section()) |
1503 | { | |
1504 | (*p)->set_out_shndx(*pshndx); | |
1505 | ++*pshndx; | |
1506 | } | |
75f65a3e ILT |
1507 | } |
1508 | ||
1509 | *poff = off; | |
ead1e424 | 1510 | return addr + (off - startoff); |
75f65a3e ILT |
1511 | } |
1512 | ||
1513 | // For a non-PT_LOAD segment, set the offset from the sections, if | |
1514 | // any. | |
1515 | ||
1516 | void | |
1517 | Output_segment::set_offset() | |
1518 | { | |
a3ad94ed | 1519 | gold_assert(this->type_ != elfcpp::PT_LOAD); |
75f65a3e ILT |
1520 | |
1521 | if (this->output_data_.empty() && this->output_bss_.empty()) | |
1522 | { | |
1523 | this->vaddr_ = 0; | |
1524 | this->paddr_ = 0; | |
1525 | this->memsz_ = 0; | |
1526 | this->align_ = 0; | |
1527 | this->offset_ = 0; | |
1528 | this->filesz_ = 0; | |
1529 | return; | |
1530 | } | |
1531 | ||
1532 | const Output_data* first; | |
1533 | if (this->output_data_.empty()) | |
1534 | first = this->output_bss_.front(); | |
1535 | else | |
1536 | first = this->output_data_.front(); | |
1537 | this->vaddr_ = first->address(); | |
1538 | this->paddr_ = this->vaddr_; | |
1539 | this->offset_ = first->offset(); | |
1540 | ||
1541 | if (this->output_data_.empty()) | |
1542 | this->filesz_ = 0; | |
1543 | else | |
1544 | { | |
1545 | const Output_data* last_data = this->output_data_.back(); | |
1546 | this->filesz_ = (last_data->address() | |
1547 | + last_data->data_size() | |
1548 | - this->vaddr_); | |
1549 | } | |
1550 | ||
1551 | const Output_data* last; | |
1552 | if (this->output_bss_.empty()) | |
1553 | last = this->output_data_.back(); | |
1554 | else | |
1555 | last = this->output_bss_.back(); | |
1556 | this->memsz_ = (last->address() | |
1557 | + last->data_size() | |
1558 | - this->vaddr_); | |
75f65a3e ILT |
1559 | } |
1560 | ||
1561 | // Return the number of Output_sections in an Output_segment. | |
1562 | ||
1563 | unsigned int | |
1564 | Output_segment::output_section_count() const | |
1565 | { | |
1566 | return (this->output_section_count_list(&this->output_data_) | |
1567 | + this->output_section_count_list(&this->output_bss_)); | |
1568 | } | |
1569 | ||
1570 | // Return the number of Output_sections in an Output_data_list. | |
1571 | ||
1572 | unsigned int | |
1573 | Output_segment::output_section_count_list(const Output_data_list* pdl) const | |
1574 | { | |
1575 | unsigned int count = 0; | |
1576 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1577 | p != pdl->end(); | |
1578 | ++p) | |
1579 | { | |
1580 | if ((*p)->is_section()) | |
1581 | ++count; | |
1582 | } | |
1583 | return count; | |
a2fb1b05 ILT |
1584 | } |
1585 | ||
61ba1cf9 ILT |
1586 | // Write the segment data into *OPHDR. |
1587 | ||
1588 | template<int size, bool big_endian> | |
1589 | void | |
ead1e424 | 1590 | Output_segment::write_header(elfcpp::Phdr_write<size, big_endian>* ophdr) |
61ba1cf9 ILT |
1591 | { |
1592 | ophdr->put_p_type(this->type_); | |
1593 | ophdr->put_p_offset(this->offset_); | |
1594 | ophdr->put_p_vaddr(this->vaddr_); | |
1595 | ophdr->put_p_paddr(this->paddr_); | |
1596 | ophdr->put_p_filesz(this->filesz_); | |
1597 | ophdr->put_p_memsz(this->memsz_); | |
1598 | ophdr->put_p_flags(this->flags_); | |
ead1e424 | 1599 | ophdr->put_p_align(this->addralign()); |
61ba1cf9 ILT |
1600 | } |
1601 | ||
1602 | // Write the section headers into V. | |
1603 | ||
1604 | template<int size, bool big_endian> | |
1605 | unsigned char* | |
16649710 ILT |
1606 | Output_segment::write_section_headers(const Layout* layout, |
1607 | const Stringpool* secnamepool, | |
ead1e424 ILT |
1608 | unsigned char* v, |
1609 | unsigned int *pshndx | |
5482377d ILT |
1610 | ACCEPT_SIZE_ENDIAN) const |
1611 | { | |
ead1e424 ILT |
1612 | // Every section that is attached to a segment must be attached to a |
1613 | // PT_LOAD segment, so we only write out section headers for PT_LOAD | |
1614 | // segments. | |
1615 | if (this->type_ != elfcpp::PT_LOAD) | |
1616 | return v; | |
1617 | ||
593f47df ILT |
1618 | v = this->write_section_headers_list |
1619 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 1620 | layout, secnamepool, &this->output_data_, v, pshndx |
593f47df ILT |
1621 | SELECT_SIZE_ENDIAN(size, big_endian)); |
1622 | v = this->write_section_headers_list | |
1623 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 1624 | layout, secnamepool, &this->output_bss_, v, pshndx |
593f47df | 1625 | SELECT_SIZE_ENDIAN(size, big_endian)); |
61ba1cf9 ILT |
1626 | return v; |
1627 | } | |
1628 | ||
1629 | template<int size, bool big_endian> | |
1630 | unsigned char* | |
16649710 ILT |
1631 | Output_segment::write_section_headers_list(const Layout* layout, |
1632 | const Stringpool* secnamepool, | |
61ba1cf9 | 1633 | const Output_data_list* pdl, |
ead1e424 ILT |
1634 | unsigned char* v, |
1635 | unsigned int* pshndx | |
5482377d | 1636 | ACCEPT_SIZE_ENDIAN) const |
61ba1cf9 ILT |
1637 | { |
1638 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1639 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1640 | p != pdl->end(); | |
1641 | ++p) | |
1642 | { | |
1643 | if ((*p)->is_section()) | |
1644 | { | |
5482377d | 1645 | const Output_section* ps = static_cast<const Output_section*>(*p); |
a3ad94ed | 1646 | gold_assert(*pshndx == ps->out_shndx()); |
61ba1cf9 | 1647 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 1648 | ps->write_header(layout, secnamepool, &oshdr); |
61ba1cf9 | 1649 | v += shdr_size; |
ead1e424 | 1650 | ++*pshndx; |
61ba1cf9 ILT |
1651 | } |
1652 | } | |
1653 | return v; | |
1654 | } | |
1655 | ||
a2fb1b05 ILT |
1656 | // Output_file methods. |
1657 | ||
c51e6221 | 1658 | Output_file::Output_file(const General_options& options, Target* target) |
61ba1cf9 | 1659 | : options_(options), |
c51e6221 | 1660 | target_(target), |
61ba1cf9 ILT |
1661 | name_(options.output_file_name()), |
1662 | o_(-1), | |
1663 | file_size_(0), | |
1664 | base_(NULL) | |
1665 | { | |
1666 | } | |
1667 | ||
1668 | // Open the output file. | |
1669 | ||
a2fb1b05 | 1670 | void |
61ba1cf9 | 1671 | Output_file::open(off_t file_size) |
a2fb1b05 | 1672 | { |
61ba1cf9 ILT |
1673 | this->file_size_ = file_size; |
1674 | ||
7e1edb90 | 1675 | int mode = parameters->output_is_object() ? 0666 : 0777; |
61ba1cf9 ILT |
1676 | int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode); |
1677 | if (o < 0) | |
1678 | { | |
1679 | fprintf(stderr, _("%s: %s: open: %s\n"), | |
1680 | program_name, this->name_, strerror(errno)); | |
1681 | gold_exit(false); | |
1682 | } | |
1683 | this->o_ = o; | |
1684 | ||
1685 | // Write out one byte to make the file the right size. | |
1686 | if (::lseek(o, file_size - 1, SEEK_SET) < 0) | |
1687 | { | |
1688 | fprintf(stderr, _("%s: %s: lseek: %s\n"), | |
1689 | program_name, this->name_, strerror(errno)); | |
1690 | gold_exit(false); | |
1691 | } | |
1692 | char b = 0; | |
1693 | if (::write(o, &b, 1) != 1) | |
1694 | { | |
1695 | fprintf(stderr, _("%s: %s: write: %s\n"), | |
1696 | program_name, this->name_, strerror(errno)); | |
1697 | gold_exit(false); | |
1698 | } | |
1699 | ||
1700 | // Map the file into memory. | |
1701 | void* base = ::mmap(NULL, file_size, PROT_READ | PROT_WRITE, | |
1702 | MAP_SHARED, o, 0); | |
1703 | if (base == MAP_FAILED) | |
1704 | { | |
1705 | fprintf(stderr, _("%s: %s: mmap: %s\n"), | |
1706 | program_name, this->name_, strerror(errno)); | |
1707 | gold_exit(false); | |
1708 | } | |
1709 | this->base_ = static_cast<unsigned char*>(base); | |
1710 | } | |
1711 | ||
1712 | // Close the output file. | |
1713 | ||
1714 | void | |
1715 | Output_file::close() | |
1716 | { | |
1717 | if (::munmap(this->base_, this->file_size_) < 0) | |
1718 | { | |
1719 | fprintf(stderr, _("%s: %s: munmap: %s\n"), | |
1720 | program_name, this->name_, strerror(errno)); | |
1721 | gold_exit(false); | |
1722 | } | |
1723 | this->base_ = NULL; | |
1724 | ||
1725 | if (::close(this->o_) < 0) | |
1726 | { | |
1727 | fprintf(stderr, _("%s: %s: close: %s\n"), | |
1728 | program_name, this->name_, strerror(errno)); | |
1729 | gold_exit(false); | |
1730 | } | |
1731 | this->o_ = -1; | |
a2fb1b05 ILT |
1732 | } |
1733 | ||
1734 | // Instantiate the templates we need. We could use the configure | |
1735 | // script to restrict this to only the ones for implemented targets. | |
1736 | ||
193a53d9 | 1737 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
1738 | template |
1739 | off_t | |
1740 | Output_section::add_input_section<32, false>( | |
f6ce93d6 | 1741 | Relobj* object, |
ead1e424 | 1742 | unsigned int shndx, |
a2fb1b05 ILT |
1743 | const char* secname, |
1744 | const elfcpp::Shdr<32, false>& shdr); | |
193a53d9 | 1745 | #endif |
a2fb1b05 | 1746 | |
193a53d9 | 1747 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
1748 | template |
1749 | off_t | |
1750 | Output_section::add_input_section<32, true>( | |
f6ce93d6 | 1751 | Relobj* object, |
ead1e424 | 1752 | unsigned int shndx, |
a2fb1b05 ILT |
1753 | const char* secname, |
1754 | const elfcpp::Shdr<32, true>& shdr); | |
193a53d9 | 1755 | #endif |
a2fb1b05 | 1756 | |
193a53d9 | 1757 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
1758 | template |
1759 | off_t | |
1760 | Output_section::add_input_section<64, false>( | |
f6ce93d6 | 1761 | Relobj* object, |
ead1e424 | 1762 | unsigned int shndx, |
a2fb1b05 ILT |
1763 | const char* secname, |
1764 | const elfcpp::Shdr<64, false>& shdr); | |
193a53d9 | 1765 | #endif |
a2fb1b05 | 1766 | |
193a53d9 | 1767 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
1768 | template |
1769 | off_t | |
1770 | Output_section::add_input_section<64, true>( | |
f6ce93d6 | 1771 | Relobj* object, |
ead1e424 | 1772 | unsigned int shndx, |
a2fb1b05 ILT |
1773 | const char* secname, |
1774 | const elfcpp::Shdr<64, true>& shdr); | |
193a53d9 | 1775 | #endif |
a2fb1b05 | 1776 | |
193a53d9 | 1777 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1778 | template |
1779 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, false>; | |
193a53d9 | 1780 | #endif |
c06b7b0b | 1781 | |
193a53d9 | 1782 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1783 | template |
1784 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, true>; | |
193a53d9 | 1785 | #endif |
c06b7b0b | 1786 | |
193a53d9 | 1787 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1788 | template |
1789 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, false>; | |
193a53d9 | 1790 | #endif |
c06b7b0b | 1791 | |
193a53d9 | 1792 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1793 | template |
1794 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, true>; | |
193a53d9 | 1795 | #endif |
c06b7b0b | 1796 | |
193a53d9 | 1797 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1798 | template |
1799 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, false>; | |
193a53d9 | 1800 | #endif |
c06b7b0b | 1801 | |
193a53d9 | 1802 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1803 | template |
1804 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, true>; | |
193a53d9 | 1805 | #endif |
c06b7b0b | 1806 | |
193a53d9 | 1807 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1808 | template |
1809 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, false>; | |
193a53d9 | 1810 | #endif |
c06b7b0b | 1811 | |
193a53d9 | 1812 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1813 | template |
1814 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, true>; | |
193a53d9 | 1815 | #endif |
c06b7b0b | 1816 | |
193a53d9 | 1817 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1818 | template |
1819 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, false>; | |
193a53d9 | 1820 | #endif |
c06b7b0b | 1821 | |
193a53d9 | 1822 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1823 | template |
1824 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, true>; | |
193a53d9 | 1825 | #endif |
c06b7b0b | 1826 | |
193a53d9 | 1827 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1828 | template |
1829 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, false>; | |
193a53d9 | 1830 | #endif |
c06b7b0b | 1831 | |
193a53d9 | 1832 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1833 | template |
1834 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, true>; | |
193a53d9 | 1835 | #endif |
c06b7b0b | 1836 | |
193a53d9 | 1837 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1838 | template |
1839 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
193a53d9 | 1840 | #endif |
c06b7b0b | 1841 | |
193a53d9 | 1842 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1843 | template |
1844 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
193a53d9 | 1845 | #endif |
c06b7b0b | 1846 | |
193a53d9 | 1847 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1848 | template |
1849 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
193a53d9 | 1850 | #endif |
c06b7b0b | 1851 | |
193a53d9 | 1852 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1853 | template |
1854 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
193a53d9 | 1855 | #endif |
c06b7b0b | 1856 | |
193a53d9 | 1857 | #ifdef HAVE_TARGET_32_LITTLE |
ead1e424 | 1858 | template |
dbe717ef | 1859 | class Output_data_got<32, false>; |
193a53d9 | 1860 | #endif |
ead1e424 | 1861 | |
193a53d9 | 1862 | #ifdef HAVE_TARGET_32_BIG |
ead1e424 | 1863 | template |
dbe717ef | 1864 | class Output_data_got<32, true>; |
193a53d9 | 1865 | #endif |
ead1e424 | 1866 | |
193a53d9 | 1867 | #ifdef HAVE_TARGET_64_LITTLE |
ead1e424 | 1868 | template |
dbe717ef | 1869 | class Output_data_got<64, false>; |
193a53d9 | 1870 | #endif |
ead1e424 | 1871 | |
193a53d9 | 1872 | #ifdef HAVE_TARGET_64_BIG |
ead1e424 | 1873 | template |
dbe717ef | 1874 | class Output_data_got<64, true>; |
193a53d9 | 1875 | #endif |
ead1e424 | 1876 | |
a2fb1b05 | 1877 | } // End namespace gold. |