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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> | |
4e9d8586 | 30 | #include <sys/stat.h> |
75f65a3e | 31 | #include <algorithm> |
a2fb1b05 | 32 | |
7e1edb90 | 33 | #include "parameters.h" |
a2fb1b05 | 34 | #include "object.h" |
ead1e424 ILT |
35 | #include "symtab.h" |
36 | #include "reloc.h" | |
b8e6aad9 | 37 | #include "merge.h" |
a2fb1b05 ILT |
38 | #include "output.h" |
39 | ||
40 | namespace gold | |
41 | { | |
42 | ||
a3ad94ed ILT |
43 | // Output_data variables. |
44 | ||
45 | bool Output_data::sizes_are_fixed; | |
46 | ||
a2fb1b05 ILT |
47 | // Output_data methods. |
48 | ||
49 | Output_data::~Output_data() | |
50 | { | |
51 | } | |
52 | ||
75f65a3e ILT |
53 | // Set the address and offset. |
54 | ||
55 | void | |
56 | Output_data::set_address(uint64_t addr, off_t off) | |
57 | { | |
58 | this->address_ = addr; | |
59 | this->offset_ = off; | |
60 | ||
61 | // Let the child class know. | |
62 | this->do_set_address(addr, off); | |
63 | } | |
64 | ||
65 | // Return the default alignment for a size--32 or 64. | |
66 | ||
67 | uint64_t | |
68 | Output_data::default_alignment(int size) | |
69 | { | |
70 | if (size == 32) | |
71 | return 4; | |
72 | else if (size == 64) | |
73 | return 8; | |
74 | else | |
a3ad94ed | 75 | gold_unreachable(); |
75f65a3e ILT |
76 | } |
77 | ||
75f65a3e ILT |
78 | // Output_section_header methods. This currently assumes that the |
79 | // segment and section lists are complete at construction time. | |
80 | ||
81 | Output_section_headers::Output_section_headers( | |
16649710 ILT |
82 | const Layout* layout, |
83 | const Layout::Segment_list* segment_list, | |
84 | const Layout::Section_list* unattached_section_list, | |
61ba1cf9 | 85 | const Stringpool* secnamepool) |
9025d29d | 86 | : layout_(layout), |
75f65a3e | 87 | segment_list_(segment_list), |
a3ad94ed | 88 | unattached_section_list_(unattached_section_list), |
61ba1cf9 | 89 | secnamepool_(secnamepool) |
75f65a3e | 90 | { |
61ba1cf9 ILT |
91 | // Count all the sections. Start with 1 for the null section. |
92 | off_t count = 1; | |
16649710 ILT |
93 | for (Layout::Segment_list::const_iterator p = segment_list->begin(); |
94 | p != segment_list->end(); | |
75f65a3e | 95 | ++p) |
ead1e424 ILT |
96 | if ((*p)->type() == elfcpp::PT_LOAD) |
97 | count += (*p)->output_section_count(); | |
16649710 | 98 | count += unattached_section_list->size(); |
75f65a3e | 99 | |
9025d29d | 100 | const int size = parameters->get_size(); |
75f65a3e ILT |
101 | int shdr_size; |
102 | if (size == 32) | |
103 | shdr_size = elfcpp::Elf_sizes<32>::shdr_size; | |
104 | else if (size == 64) | |
105 | shdr_size = elfcpp::Elf_sizes<64>::shdr_size; | |
106 | else | |
a3ad94ed | 107 | gold_unreachable(); |
75f65a3e ILT |
108 | |
109 | this->set_data_size(count * shdr_size); | |
110 | } | |
111 | ||
61ba1cf9 ILT |
112 | // Write out the section headers. |
113 | ||
75f65a3e | 114 | void |
61ba1cf9 | 115 | Output_section_headers::do_write(Output_file* of) |
a2fb1b05 | 116 | { |
9025d29d | 117 | if (parameters->get_size() == 32) |
61ba1cf9 | 118 | { |
9025d29d ILT |
119 | if (parameters->is_big_endian()) |
120 | { | |
121 | #ifdef HAVE_TARGET_32_BIG | |
122 | this->do_sized_write<32, true>(of); | |
123 | #else | |
124 | gold_unreachable(); | |
125 | #endif | |
126 | } | |
61ba1cf9 | 127 | else |
9025d29d ILT |
128 | { |
129 | #ifdef HAVE_TARGET_32_LITTLE | |
130 | this->do_sized_write<32, false>(of); | |
131 | #else | |
132 | gold_unreachable(); | |
133 | #endif | |
134 | } | |
61ba1cf9 | 135 | } |
9025d29d | 136 | else if (parameters->get_size() == 64) |
61ba1cf9 | 137 | { |
9025d29d ILT |
138 | if (parameters->is_big_endian()) |
139 | { | |
140 | #ifdef HAVE_TARGET_64_BIG | |
141 | this->do_sized_write<64, true>(of); | |
142 | #else | |
143 | gold_unreachable(); | |
144 | #endif | |
145 | } | |
61ba1cf9 | 146 | else |
9025d29d ILT |
147 | { |
148 | #ifdef HAVE_TARGET_64_LITTLE | |
149 | this->do_sized_write<64, false>(of); | |
150 | #else | |
151 | gold_unreachable(); | |
152 | #endif | |
153 | } | |
61ba1cf9 ILT |
154 | } |
155 | else | |
a3ad94ed | 156 | gold_unreachable(); |
61ba1cf9 ILT |
157 | } |
158 | ||
159 | template<int size, bool big_endian> | |
160 | void | |
161 | Output_section_headers::do_sized_write(Output_file* of) | |
162 | { | |
163 | off_t all_shdrs_size = this->data_size(); | |
164 | unsigned char* view = of->get_output_view(this->offset(), all_shdrs_size); | |
165 | ||
166 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
167 | unsigned char* v = view; | |
168 | ||
169 | { | |
170 | typename elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
171 | oshdr.put_sh_name(0); | |
172 | oshdr.put_sh_type(elfcpp::SHT_NULL); | |
173 | oshdr.put_sh_flags(0); | |
174 | oshdr.put_sh_addr(0); | |
175 | oshdr.put_sh_offset(0); | |
176 | oshdr.put_sh_size(0); | |
177 | oshdr.put_sh_link(0); | |
178 | oshdr.put_sh_info(0); | |
179 | oshdr.put_sh_addralign(0); | |
180 | oshdr.put_sh_entsize(0); | |
181 | } | |
182 | ||
183 | v += shdr_size; | |
184 | ||
ead1e424 | 185 | unsigned shndx = 1; |
16649710 ILT |
186 | for (Layout::Segment_list::const_iterator p = this->segment_list_->begin(); |
187 | p != this->segment_list_->end(); | |
61ba1cf9 | 188 | ++p) |
593f47df | 189 | v = (*p)->write_section_headers SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
16649710 | 190 | this->layout_, this->secnamepool_, v, &shndx |
ead1e424 | 191 | SELECT_SIZE_ENDIAN(size, big_endian)); |
a3ad94ed | 192 | for (Layout::Section_list::const_iterator p = |
16649710 ILT |
193 | this->unattached_section_list_->begin(); |
194 | p != this->unattached_section_list_->end(); | |
61ba1cf9 ILT |
195 | ++p) |
196 | { | |
a3ad94ed | 197 | gold_assert(shndx == (*p)->out_shndx()); |
61ba1cf9 | 198 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 199 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); |
61ba1cf9 | 200 | v += shdr_size; |
ead1e424 | 201 | ++shndx; |
61ba1cf9 ILT |
202 | } |
203 | ||
204 | of->write_output_view(this->offset(), all_shdrs_size, view); | |
a2fb1b05 ILT |
205 | } |
206 | ||
54dc6425 ILT |
207 | // Output_segment_header methods. |
208 | ||
61ba1cf9 | 209 | Output_segment_headers::Output_segment_headers( |
61ba1cf9 | 210 | const Layout::Segment_list& segment_list) |
9025d29d | 211 | : segment_list_(segment_list) |
61ba1cf9 | 212 | { |
9025d29d | 213 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
214 | int phdr_size; |
215 | if (size == 32) | |
216 | phdr_size = elfcpp::Elf_sizes<32>::phdr_size; | |
217 | else if (size == 64) | |
218 | phdr_size = elfcpp::Elf_sizes<64>::phdr_size; | |
219 | else | |
a3ad94ed | 220 | gold_unreachable(); |
61ba1cf9 ILT |
221 | |
222 | this->set_data_size(segment_list.size() * phdr_size); | |
223 | } | |
224 | ||
54dc6425 | 225 | void |
61ba1cf9 | 226 | Output_segment_headers::do_write(Output_file* of) |
75f65a3e | 227 | { |
9025d29d | 228 | if (parameters->get_size() == 32) |
61ba1cf9 | 229 | { |
9025d29d ILT |
230 | if (parameters->is_big_endian()) |
231 | { | |
232 | #ifdef HAVE_TARGET_32_BIG | |
233 | this->do_sized_write<32, true>(of); | |
234 | #else | |
235 | gold_unreachable(); | |
236 | #endif | |
237 | } | |
61ba1cf9 | 238 | else |
9025d29d ILT |
239 | { |
240 | #ifdef HAVE_TARGET_32_LITTLE | |
61ba1cf9 | 241 | this->do_sized_write<32, false>(of); |
9025d29d ILT |
242 | #else |
243 | gold_unreachable(); | |
244 | #endif | |
245 | } | |
61ba1cf9 | 246 | } |
9025d29d | 247 | else if (parameters->get_size() == 64) |
61ba1cf9 | 248 | { |
9025d29d ILT |
249 | if (parameters->is_big_endian()) |
250 | { | |
251 | #ifdef HAVE_TARGET_64_BIG | |
252 | this->do_sized_write<64, true>(of); | |
253 | #else | |
254 | gold_unreachable(); | |
255 | #endif | |
256 | } | |
61ba1cf9 | 257 | else |
9025d29d ILT |
258 | { |
259 | #ifdef HAVE_TARGET_64_LITTLE | |
260 | this->do_sized_write<64, false>(of); | |
261 | #else | |
262 | gold_unreachable(); | |
263 | #endif | |
264 | } | |
61ba1cf9 ILT |
265 | } |
266 | else | |
a3ad94ed | 267 | gold_unreachable(); |
61ba1cf9 ILT |
268 | } |
269 | ||
270 | template<int size, bool big_endian> | |
271 | void | |
272 | Output_segment_headers::do_sized_write(Output_file* of) | |
273 | { | |
274 | const int phdr_size = elfcpp::Elf_sizes<size>::phdr_size; | |
275 | off_t all_phdrs_size = this->segment_list_.size() * phdr_size; | |
276 | unsigned char* view = of->get_output_view(this->offset(), | |
277 | all_phdrs_size); | |
278 | unsigned char* v = view; | |
279 | for (Layout::Segment_list::const_iterator p = this->segment_list_.begin(); | |
280 | p != this->segment_list_.end(); | |
281 | ++p) | |
282 | { | |
283 | elfcpp::Phdr_write<size, big_endian> ophdr(v); | |
284 | (*p)->write_header(&ophdr); | |
285 | v += phdr_size; | |
286 | } | |
287 | ||
288 | of->write_output_view(this->offset(), all_phdrs_size, view); | |
75f65a3e ILT |
289 | } |
290 | ||
291 | // Output_file_header methods. | |
292 | ||
9025d29d | 293 | Output_file_header::Output_file_header(const Target* target, |
75f65a3e ILT |
294 | const Symbol_table* symtab, |
295 | const Output_segment_headers* osh) | |
9025d29d | 296 | : target_(target), |
75f65a3e | 297 | symtab_(symtab), |
61ba1cf9 | 298 | segment_header_(osh), |
75f65a3e ILT |
299 | section_header_(NULL), |
300 | shstrtab_(NULL) | |
301 | { | |
9025d29d | 302 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
303 | int ehdr_size; |
304 | if (size == 32) | |
305 | ehdr_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
306 | else if (size == 64) | |
307 | ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
308 | else | |
a3ad94ed | 309 | gold_unreachable(); |
61ba1cf9 ILT |
310 | |
311 | this->set_data_size(ehdr_size); | |
75f65a3e ILT |
312 | } |
313 | ||
314 | // Set the section table information for a file header. | |
315 | ||
316 | void | |
317 | Output_file_header::set_section_info(const Output_section_headers* shdrs, | |
318 | const Output_section* shstrtab) | |
319 | { | |
320 | this->section_header_ = shdrs; | |
321 | this->shstrtab_ = shstrtab; | |
322 | } | |
323 | ||
324 | // Write out the file header. | |
325 | ||
326 | void | |
61ba1cf9 | 327 | Output_file_header::do_write(Output_file* of) |
54dc6425 | 328 | { |
9025d29d | 329 | if (parameters->get_size() == 32) |
61ba1cf9 | 330 | { |
9025d29d ILT |
331 | if (parameters->is_big_endian()) |
332 | { | |
333 | #ifdef HAVE_TARGET_32_BIG | |
334 | this->do_sized_write<32, true>(of); | |
335 | #else | |
336 | gold_unreachable(); | |
337 | #endif | |
338 | } | |
61ba1cf9 | 339 | else |
9025d29d ILT |
340 | { |
341 | #ifdef HAVE_TARGET_32_LITTLE | |
342 | this->do_sized_write<32, false>(of); | |
343 | #else | |
344 | gold_unreachable(); | |
345 | #endif | |
346 | } | |
61ba1cf9 | 347 | } |
9025d29d | 348 | else if (parameters->get_size() == 64) |
61ba1cf9 | 349 | { |
9025d29d ILT |
350 | if (parameters->is_big_endian()) |
351 | { | |
352 | #ifdef HAVE_TARGET_64_BIG | |
353 | this->do_sized_write<64, true>(of); | |
354 | #else | |
355 | gold_unreachable(); | |
356 | #endif | |
357 | } | |
61ba1cf9 | 358 | else |
9025d29d ILT |
359 | { |
360 | #ifdef HAVE_TARGET_64_LITTLE | |
361 | this->do_sized_write<64, false>(of); | |
362 | #else | |
363 | gold_unreachable(); | |
364 | #endif | |
365 | } | |
61ba1cf9 ILT |
366 | } |
367 | else | |
a3ad94ed | 368 | gold_unreachable(); |
61ba1cf9 ILT |
369 | } |
370 | ||
371 | // Write out the file header with appropriate size and endianess. | |
372 | ||
373 | template<int size, bool big_endian> | |
374 | void | |
375 | Output_file_header::do_sized_write(Output_file* of) | |
376 | { | |
a3ad94ed | 377 | gold_assert(this->offset() == 0); |
61ba1cf9 ILT |
378 | |
379 | int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; | |
380 | unsigned char* view = of->get_output_view(0, ehdr_size); | |
381 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); | |
382 | ||
383 | unsigned char e_ident[elfcpp::EI_NIDENT]; | |
384 | memset(e_ident, 0, elfcpp::EI_NIDENT); | |
385 | e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0; | |
386 | e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1; | |
387 | e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2; | |
388 | e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3; | |
389 | if (size == 32) | |
390 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32; | |
391 | else if (size == 64) | |
392 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64; | |
393 | else | |
a3ad94ed | 394 | gold_unreachable(); |
61ba1cf9 ILT |
395 | e_ident[elfcpp::EI_DATA] = (big_endian |
396 | ? elfcpp::ELFDATA2MSB | |
397 | : elfcpp::ELFDATA2LSB); | |
398 | e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; | |
399 | // FIXME: Some targets may need to set EI_OSABI and EI_ABIVERSION. | |
400 | oehdr.put_e_ident(e_ident); | |
401 | ||
402 | elfcpp::ET e_type; | |
403 | // FIXME: ET_DYN. | |
7e1edb90 | 404 | if (parameters->output_is_object()) |
61ba1cf9 ILT |
405 | e_type = elfcpp::ET_REL; |
406 | else | |
407 | e_type = elfcpp::ET_EXEC; | |
408 | oehdr.put_e_type(e_type); | |
409 | ||
410 | oehdr.put_e_machine(this->target_->machine_code()); | |
411 | oehdr.put_e_version(elfcpp::EV_CURRENT); | |
412 | ||
ead1e424 | 413 | // FIXME: Need to support -e, and target specific entry symbol. |
61ba1cf9 ILT |
414 | Symbol* sym = this->symtab_->lookup("_start"); |
415 | typename Sized_symbol<size>::Value_type v; | |
416 | if (sym == NULL) | |
417 | v = 0; | |
418 | else | |
419 | { | |
420 | Sized_symbol<size>* ssym; | |
593f47df | 421 | ssym = this->symtab_->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d | 422 | sym SELECT_SIZE(size)); |
61ba1cf9 ILT |
423 | v = ssym->value(); |
424 | } | |
425 | oehdr.put_e_entry(v); | |
426 | ||
427 | oehdr.put_e_phoff(this->segment_header_->offset()); | |
428 | oehdr.put_e_shoff(this->section_header_->offset()); | |
429 | ||
430 | // FIXME: The target needs to set the flags. | |
431 | oehdr.put_e_flags(0); | |
432 | ||
433 | oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size); | |
434 | oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size); | |
435 | oehdr.put_e_phnum(this->segment_header_->data_size() | |
436 | / elfcpp::Elf_sizes<size>::phdr_size); | |
437 | oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size); | |
438 | oehdr.put_e_shnum(this->section_header_->data_size() | |
439 | / elfcpp::Elf_sizes<size>::shdr_size); | |
ead1e424 | 440 | oehdr.put_e_shstrndx(this->shstrtab_->out_shndx()); |
61ba1cf9 ILT |
441 | |
442 | of->write_output_view(0, ehdr_size, view); | |
54dc6425 ILT |
443 | } |
444 | ||
dbe717ef ILT |
445 | // Output_data_const methods. |
446 | ||
447 | void | |
a3ad94ed | 448 | Output_data_const::do_write(Output_file* of) |
dbe717ef | 449 | { |
a3ad94ed ILT |
450 | of->write(this->offset(), this->data_.data(), this->data_.size()); |
451 | } | |
452 | ||
453 | // Output_data_const_buffer methods. | |
454 | ||
455 | void | |
456 | Output_data_const_buffer::do_write(Output_file* of) | |
457 | { | |
458 | of->write(this->offset(), this->p_, this->data_size()); | |
dbe717ef ILT |
459 | } |
460 | ||
461 | // Output_section_data methods. | |
462 | ||
16649710 ILT |
463 | // Record the output section, and set the entry size and such. |
464 | ||
465 | void | |
466 | Output_section_data::set_output_section(Output_section* os) | |
467 | { | |
468 | gold_assert(this->output_section_ == NULL); | |
469 | this->output_section_ = os; | |
470 | this->do_adjust_output_section(os); | |
471 | } | |
472 | ||
473 | // Return the section index of the output section. | |
474 | ||
dbe717ef ILT |
475 | unsigned int |
476 | Output_section_data::do_out_shndx() const | |
477 | { | |
a3ad94ed | 478 | gold_assert(this->output_section_ != NULL); |
dbe717ef ILT |
479 | return this->output_section_->out_shndx(); |
480 | } | |
481 | ||
a3ad94ed ILT |
482 | // Output_data_strtab methods. |
483 | ||
484 | // Set the address. We don't actually care about the address, but we | |
485 | // do set our final size. | |
486 | ||
487 | void | |
488 | Output_data_strtab::do_set_address(uint64_t, off_t) | |
489 | { | |
490 | this->strtab_->set_string_offsets(); | |
491 | this->set_data_size(this->strtab_->get_strtab_size()); | |
492 | } | |
493 | ||
494 | // Write out a string table. | |
495 | ||
496 | void | |
497 | Output_data_strtab::do_write(Output_file* of) | |
498 | { | |
499 | this->strtab_->write(of, this->offset()); | |
500 | } | |
501 | ||
c06b7b0b ILT |
502 | // Output_reloc methods. |
503 | ||
504 | // Get the symbol index of a relocation. | |
505 | ||
506 | template<bool dynamic, int size, bool big_endian> | |
507 | unsigned int | |
508 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index() | |
509 | const | |
510 | { | |
511 | unsigned int index; | |
512 | switch (this->local_sym_index_) | |
513 | { | |
514 | case INVALID_CODE: | |
a3ad94ed | 515 | gold_unreachable(); |
c06b7b0b ILT |
516 | |
517 | case GSYM_CODE: | |
5a6f7e2d | 518 | if (this->u1_.gsym == NULL) |
c06b7b0b ILT |
519 | index = 0; |
520 | else if (dynamic) | |
5a6f7e2d | 521 | index = this->u1_.gsym->dynsym_index(); |
c06b7b0b | 522 | else |
5a6f7e2d | 523 | index = this->u1_.gsym->symtab_index(); |
c06b7b0b ILT |
524 | break; |
525 | ||
526 | case SECTION_CODE: | |
527 | if (dynamic) | |
5a6f7e2d | 528 | index = this->u1_.os->dynsym_index(); |
c06b7b0b | 529 | else |
5a6f7e2d | 530 | index = this->u1_.os->symtab_index(); |
c06b7b0b ILT |
531 | break; |
532 | ||
533 | default: | |
534 | if (dynamic) | |
535 | { | |
536 | // FIXME: It seems that some targets may need to generate | |
537 | // dynamic relocations against local symbols for some | |
538 | // reasons. This will have to be addressed at some point. | |
a3ad94ed | 539 | gold_unreachable(); |
c06b7b0b ILT |
540 | } |
541 | else | |
5a6f7e2d | 542 | index = this->u1_.relobj->symtab_index(this->local_sym_index_); |
c06b7b0b ILT |
543 | break; |
544 | } | |
a3ad94ed | 545 | gold_assert(index != -1U); |
c06b7b0b ILT |
546 | return index; |
547 | } | |
548 | ||
549 | // Write out the offset and info fields of a Rel or Rela relocation | |
550 | // entry. | |
551 | ||
552 | template<bool dynamic, int size, bool big_endian> | |
553 | template<typename Write_rel> | |
554 | void | |
555 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel( | |
556 | Write_rel* wr) const | |
557 | { | |
a3ad94ed | 558 | Address address = this->address_; |
5a6f7e2d ILT |
559 | if (this->shndx_ != INVALID_CODE) |
560 | { | |
561 | off_t off; | |
562 | Output_section* os = this->u2_.relobj->output_section(this->shndx_, | |
563 | &off); | |
564 | gold_assert(os != NULL); | |
565 | address += os->address() + off; | |
566 | } | |
567 | else if (this->u2_.od != NULL) | |
568 | address += this->u2_.od->address(); | |
a3ad94ed | 569 | wr->put_r_offset(address); |
c06b7b0b ILT |
570 | wr->put_r_info(elfcpp::elf_r_info<size>(this->get_symbol_index(), |
571 | this->type_)); | |
572 | } | |
573 | ||
574 | // Write out a Rel relocation. | |
575 | ||
576 | template<bool dynamic, int size, bool big_endian> | |
577 | void | |
578 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write( | |
579 | unsigned char* pov) const | |
580 | { | |
581 | elfcpp::Rel_write<size, big_endian> orel(pov); | |
582 | this->write_rel(&orel); | |
583 | } | |
584 | ||
585 | // Write out a Rela relocation. | |
586 | ||
587 | template<bool dynamic, int size, bool big_endian> | |
588 | void | |
589 | Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write( | |
590 | unsigned char* pov) const | |
591 | { | |
592 | elfcpp::Rela_write<size, big_endian> orel(pov); | |
593 | this->rel_.write_rel(&orel); | |
594 | orel.put_r_addend(this->addend_); | |
595 | } | |
596 | ||
597 | // Output_data_reloc_base methods. | |
598 | ||
16649710 ILT |
599 | // Adjust the output section. |
600 | ||
601 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
602 | void | |
603 | Output_data_reloc_base<sh_type, dynamic, size, big_endian> | |
604 | ::do_adjust_output_section(Output_section* os) | |
605 | { | |
606 | if (sh_type == elfcpp::SHT_REL) | |
607 | os->set_entsize(elfcpp::Elf_sizes<size>::rel_size); | |
608 | else if (sh_type == elfcpp::SHT_RELA) | |
609 | os->set_entsize(elfcpp::Elf_sizes<size>::rela_size); | |
610 | else | |
611 | gold_unreachable(); | |
612 | if (dynamic) | |
613 | os->set_should_link_to_dynsym(); | |
614 | else | |
615 | os->set_should_link_to_symtab(); | |
616 | } | |
617 | ||
c06b7b0b ILT |
618 | // Write out relocation data. |
619 | ||
620 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
621 | void | |
622 | Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write( | |
623 | Output_file* of) | |
624 | { | |
625 | const off_t off = this->offset(); | |
626 | const off_t oview_size = this->data_size(); | |
627 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
628 | ||
629 | unsigned char* pov = oview; | |
630 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
631 | p != this->relocs_.end(); | |
632 | ++p) | |
633 | { | |
634 | p->write(pov); | |
635 | pov += reloc_size; | |
636 | } | |
637 | ||
a3ad94ed | 638 | gold_assert(pov - oview == oview_size); |
c06b7b0b ILT |
639 | |
640 | of->write_output_view(off, oview_size, oview); | |
641 | ||
642 | // We no longer need the relocation entries. | |
643 | this->relocs_.clear(); | |
644 | } | |
645 | ||
dbe717ef | 646 | // Output_data_got::Got_entry methods. |
ead1e424 ILT |
647 | |
648 | // Write out the entry. | |
649 | ||
650 | template<int size, bool big_endian> | |
651 | void | |
7e1edb90 | 652 | Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const |
ead1e424 ILT |
653 | { |
654 | Valtype val = 0; | |
655 | ||
656 | switch (this->local_sym_index_) | |
657 | { | |
658 | case GSYM_CODE: | |
659 | { | |
660 | Symbol* gsym = this->u_.gsym; | |
661 | ||
662 | // If the symbol is resolved locally, we need to write out its | |
663 | // value. Otherwise we just write zero. The target code is | |
664 | // responsible for creating a relocation entry to fill in the | |
665 | // value at runtime. | |
7e1edb90 | 666 | if (gsym->final_value_is_known()) |
ead1e424 ILT |
667 | { |
668 | Sized_symbol<size>* sgsym; | |
669 | // This cast is a bit ugly. We don't want to put a | |
670 | // virtual method in Symbol, because we want Symbol to be | |
671 | // as small as possible. | |
672 | sgsym = static_cast<Sized_symbol<size>*>(gsym); | |
673 | val = sgsym->value(); | |
674 | } | |
675 | } | |
676 | break; | |
677 | ||
678 | case CONSTANT_CODE: | |
679 | val = this->u_.constant; | |
680 | break; | |
681 | ||
682 | default: | |
e727fa71 ILT |
683 | val = this->u_.object->local_symbol_value(this->local_sym_index_); |
684 | break; | |
ead1e424 ILT |
685 | } |
686 | ||
a3ad94ed | 687 | elfcpp::Swap<size, big_endian>::writeval(pov, val); |
ead1e424 ILT |
688 | } |
689 | ||
dbe717ef | 690 | // Output_data_got methods. |
ead1e424 | 691 | |
dbe717ef ILT |
692 | // Add an entry for a global symbol to the GOT. This returns true if |
693 | // this is a new GOT entry, false if the symbol already had a GOT | |
694 | // entry. | |
695 | ||
696 | template<int size, bool big_endian> | |
697 | bool | |
698 | Output_data_got<size, big_endian>::add_global(Symbol* gsym) | |
ead1e424 | 699 | { |
dbe717ef ILT |
700 | if (gsym->has_got_offset()) |
701 | return false; | |
ead1e424 | 702 | |
dbe717ef ILT |
703 | this->entries_.push_back(Got_entry(gsym)); |
704 | this->set_got_size(); | |
705 | gsym->set_got_offset(this->last_got_offset()); | |
706 | return true; | |
707 | } | |
ead1e424 | 708 | |
e727fa71 ILT |
709 | // Add an entry for a local symbol to the GOT. This returns true if |
710 | // this is a new GOT entry, false if the symbol already has a GOT | |
711 | // entry. | |
712 | ||
713 | template<int size, bool big_endian> | |
714 | bool | |
715 | Output_data_got<size, big_endian>::add_local( | |
716 | Sized_relobj<size, big_endian>* object, | |
717 | unsigned int symndx) | |
718 | { | |
719 | if (object->local_has_got_offset(symndx)) | |
720 | return false; | |
721 | this->entries_.push_back(Got_entry(object, symndx)); | |
722 | this->set_got_size(); | |
723 | object->set_local_got_offset(symndx, this->last_got_offset()); | |
724 | return true; | |
725 | } | |
726 | ||
ead1e424 ILT |
727 | // Write out the GOT. |
728 | ||
729 | template<int size, bool big_endian> | |
730 | void | |
dbe717ef | 731 | Output_data_got<size, big_endian>::do_write(Output_file* of) |
ead1e424 ILT |
732 | { |
733 | const int add = size / 8; | |
734 | ||
735 | const off_t off = this->offset(); | |
c06b7b0b | 736 | const off_t oview_size = this->data_size(); |
ead1e424 ILT |
737 | unsigned char* const oview = of->get_output_view(off, oview_size); |
738 | ||
739 | unsigned char* pov = oview; | |
740 | for (typename Got_entries::const_iterator p = this->entries_.begin(); | |
741 | p != this->entries_.end(); | |
742 | ++p) | |
743 | { | |
7e1edb90 | 744 | p->write(pov); |
ead1e424 ILT |
745 | pov += add; |
746 | } | |
747 | ||
a3ad94ed | 748 | gold_assert(pov - oview == oview_size); |
c06b7b0b | 749 | |
ead1e424 ILT |
750 | of->write_output_view(off, oview_size, oview); |
751 | ||
752 | // We no longer need the GOT entries. | |
753 | this->entries_.clear(); | |
754 | } | |
755 | ||
a3ad94ed ILT |
756 | // Output_data_dynamic::Dynamic_entry methods. |
757 | ||
758 | // Write out the entry. | |
759 | ||
760 | template<int size, bool big_endian> | |
761 | void | |
762 | Output_data_dynamic::Dynamic_entry::write( | |
763 | unsigned char* pov, | |
1ddbd1e6 ILT |
764 | const Stringpool* pool |
765 | ACCEPT_SIZE_ENDIAN) const | |
a3ad94ed ILT |
766 | { |
767 | typename elfcpp::Elf_types<size>::Elf_WXword val; | |
768 | switch (this->classification_) | |
769 | { | |
770 | case DYNAMIC_NUMBER: | |
771 | val = this->u_.val; | |
772 | break; | |
773 | ||
774 | case DYNAMIC_SECTION_ADDRESS: | |
16649710 | 775 | val = this->u_.od->address(); |
a3ad94ed ILT |
776 | break; |
777 | ||
778 | case DYNAMIC_SECTION_SIZE: | |
16649710 | 779 | val = this->u_.od->data_size(); |
a3ad94ed ILT |
780 | break; |
781 | ||
782 | case DYNAMIC_SYMBOL: | |
783 | { | |
16649710 ILT |
784 | const Sized_symbol<size>* s = |
785 | static_cast<const Sized_symbol<size>*>(this->u_.sym); | |
a3ad94ed ILT |
786 | val = s->value(); |
787 | } | |
788 | break; | |
789 | ||
790 | case DYNAMIC_STRING: | |
791 | val = pool->get_offset(this->u_.str); | |
792 | break; | |
793 | ||
794 | default: | |
795 | gold_unreachable(); | |
796 | } | |
797 | ||
798 | elfcpp::Dyn_write<size, big_endian> dw(pov); | |
799 | dw.put_d_tag(this->tag_); | |
800 | dw.put_d_val(val); | |
801 | } | |
802 | ||
803 | // Output_data_dynamic methods. | |
804 | ||
16649710 ILT |
805 | // Adjust the output section to set the entry size. |
806 | ||
807 | void | |
808 | Output_data_dynamic::do_adjust_output_section(Output_section* os) | |
809 | { | |
9025d29d | 810 | if (parameters->get_size() == 32) |
16649710 | 811 | os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size); |
9025d29d | 812 | else if (parameters->get_size() == 64) |
16649710 ILT |
813 | os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size); |
814 | else | |
815 | gold_unreachable(); | |
816 | } | |
817 | ||
a3ad94ed ILT |
818 | // Set the final data size. |
819 | ||
820 | void | |
821 | Output_data_dynamic::do_set_address(uint64_t, off_t) | |
822 | { | |
823 | // Add the terminating entry. | |
824 | this->add_constant(elfcpp::DT_NULL, 0); | |
825 | ||
826 | int dyn_size; | |
9025d29d | 827 | if (parameters->get_size() == 32) |
a3ad94ed | 828 | dyn_size = elfcpp::Elf_sizes<32>::dyn_size; |
9025d29d | 829 | else if (parameters->get_size() == 64) |
a3ad94ed ILT |
830 | dyn_size = elfcpp::Elf_sizes<64>::dyn_size; |
831 | else | |
832 | gold_unreachable(); | |
833 | this->set_data_size(this->entries_.size() * dyn_size); | |
834 | } | |
835 | ||
836 | // Write out the dynamic entries. | |
837 | ||
838 | void | |
839 | Output_data_dynamic::do_write(Output_file* of) | |
840 | { | |
9025d29d | 841 | if (parameters->get_size() == 32) |
a3ad94ed | 842 | { |
9025d29d ILT |
843 | if (parameters->is_big_endian()) |
844 | { | |
845 | #ifdef HAVE_TARGET_32_BIG | |
846 | this->sized_write<32, true>(of); | |
847 | #else | |
848 | gold_unreachable(); | |
849 | #endif | |
850 | } | |
a3ad94ed | 851 | else |
9025d29d ILT |
852 | { |
853 | #ifdef HAVE_TARGET_32_LITTLE | |
854 | this->sized_write<32, false>(of); | |
855 | #else | |
856 | gold_unreachable(); | |
857 | #endif | |
858 | } | |
a3ad94ed | 859 | } |
9025d29d | 860 | else if (parameters->get_size() == 64) |
a3ad94ed | 861 | { |
9025d29d ILT |
862 | if (parameters->is_big_endian()) |
863 | { | |
864 | #ifdef HAVE_TARGET_64_BIG | |
865 | this->sized_write<64, true>(of); | |
866 | #else | |
867 | gold_unreachable(); | |
868 | #endif | |
869 | } | |
a3ad94ed | 870 | else |
9025d29d ILT |
871 | { |
872 | #ifdef HAVE_TARGET_64_LITTLE | |
873 | this->sized_write<64, false>(of); | |
874 | #else | |
875 | gold_unreachable(); | |
876 | #endif | |
877 | } | |
a3ad94ed ILT |
878 | } |
879 | else | |
880 | gold_unreachable(); | |
881 | } | |
882 | ||
883 | template<int size, bool big_endian> | |
884 | void | |
885 | Output_data_dynamic::sized_write(Output_file* of) | |
886 | { | |
887 | const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
888 | ||
889 | const off_t offset = this->offset(); | |
890 | const off_t oview_size = this->data_size(); | |
891 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
892 | ||
893 | unsigned char* pov = oview; | |
894 | for (typename Dynamic_entries::const_iterator p = this->entries_.begin(); | |
895 | p != this->entries_.end(); | |
896 | ++p) | |
897 | { | |
1ddbd1e6 ILT |
898 | p->write SELECT_SIZE_ENDIAN_NAME(size, big_endian)( |
899 | pov, this->pool_ SELECT_SIZE_ENDIAN(size, big_endian)); | |
a3ad94ed ILT |
900 | pov += dyn_size; |
901 | } | |
902 | ||
903 | gold_assert(pov - oview == oview_size); | |
904 | ||
905 | of->write_output_view(offset, oview_size, oview); | |
906 | ||
907 | // We no longer need the dynamic entries. | |
908 | this->entries_.clear(); | |
909 | } | |
910 | ||
ead1e424 ILT |
911 | // Output_section::Input_section methods. |
912 | ||
913 | // Return the data size. For an input section we store the size here. | |
914 | // For an Output_section_data, we have to ask it for the size. | |
915 | ||
916 | off_t | |
917 | Output_section::Input_section::data_size() const | |
918 | { | |
919 | if (this->is_input_section()) | |
b8e6aad9 | 920 | return this->u1_.data_size; |
ead1e424 | 921 | else |
b8e6aad9 | 922 | return this->u2_.posd->data_size(); |
ead1e424 ILT |
923 | } |
924 | ||
925 | // Set the address and file offset. | |
926 | ||
927 | void | |
928 | Output_section::Input_section::set_address(uint64_t addr, off_t off, | |
929 | off_t secoff) | |
930 | { | |
931 | if (this->is_input_section()) | |
b8e6aad9 | 932 | this->u2_.object->set_section_offset(this->shndx_, off - secoff); |
ead1e424 | 933 | else |
b8e6aad9 ILT |
934 | this->u2_.posd->set_address(addr, off); |
935 | } | |
936 | ||
937 | // Try to turn an input address into an output address. | |
938 | ||
939 | bool | |
940 | Output_section::Input_section::output_address(const Relobj* object, | |
941 | unsigned int shndx, | |
942 | off_t offset, | |
943 | uint64_t output_section_address, | |
944 | uint64_t *poutput) const | |
945 | { | |
946 | if (!this->is_input_section()) | |
947 | return this->u2_.posd->output_address(object, shndx, offset, | |
948 | output_section_address, poutput); | |
949 | else | |
950 | { | |
9d7094e8 ILT |
951 | if (this->shndx_ != shndx |
952 | || this->u2_.object != object) | |
b8e6aad9 ILT |
953 | return false; |
954 | off_t output_offset; | |
955 | Output_section* os = object->output_section(shndx, &output_offset); | |
956 | gold_assert(os != NULL); | |
957 | *poutput = output_section_address + output_offset + offset; | |
958 | return true; | |
959 | } | |
ead1e424 ILT |
960 | } |
961 | ||
962 | // Write out the data. We don't have to do anything for an input | |
963 | // section--they are handled via Object::relocate--but this is where | |
964 | // we write out the data for an Output_section_data. | |
965 | ||
966 | void | |
967 | Output_section::Input_section::write(Output_file* of) | |
968 | { | |
969 | if (!this->is_input_section()) | |
b8e6aad9 | 970 | this->u2_.posd->write(of); |
ead1e424 ILT |
971 | } |
972 | ||
a2fb1b05 ILT |
973 | // Output_section methods. |
974 | ||
975 | // Construct an Output_section. NAME will point into a Stringpool. | |
976 | ||
977 | Output_section::Output_section(const char* name, elfcpp::Elf_Word type, | |
b8e6aad9 | 978 | elfcpp::Elf_Xword flags) |
a2fb1b05 | 979 | : name_(name), |
a2fb1b05 ILT |
980 | addralign_(0), |
981 | entsize_(0), | |
16649710 | 982 | link_section_(NULL), |
a2fb1b05 | 983 | link_(0), |
16649710 | 984 | info_section_(NULL), |
a2fb1b05 ILT |
985 | info_(0), |
986 | type_(type), | |
61ba1cf9 | 987 | flags_(flags), |
ead1e424 | 988 | out_shndx_(0), |
c06b7b0b ILT |
989 | symtab_index_(0), |
990 | dynsym_index_(0), | |
ead1e424 ILT |
991 | input_sections_(), |
992 | first_input_offset_(0), | |
c51e6221 | 993 | fills_(), |
a3ad94ed | 994 | needs_symtab_index_(false), |
16649710 ILT |
995 | needs_dynsym_index_(false), |
996 | should_link_to_symtab_(false), | |
997 | should_link_to_dynsym_(false) | |
a2fb1b05 ILT |
998 | { |
999 | } | |
1000 | ||
54dc6425 ILT |
1001 | Output_section::~Output_section() |
1002 | { | |
1003 | } | |
1004 | ||
16649710 ILT |
1005 | // Set the entry size. |
1006 | ||
1007 | void | |
1008 | Output_section::set_entsize(uint64_t v) | |
1009 | { | |
1010 | if (this->entsize_ == 0) | |
1011 | this->entsize_ = v; | |
1012 | else | |
1013 | gold_assert(this->entsize_ == v); | |
1014 | } | |
1015 | ||
ead1e424 ILT |
1016 | // Add the input section SHNDX, with header SHDR, named SECNAME, in |
1017 | // OBJECT, to the Output_section. Return the offset of the input | |
1018 | // section within the output section. We don't always keep track of | |
a2fb1b05 ILT |
1019 | // input sections for an Output_section. Instead, each Object keeps |
1020 | // track of the Output_section for each of its input sections. | |
1021 | ||
1022 | template<int size, bool big_endian> | |
1023 | off_t | |
f6ce93d6 | 1024 | Output_section::add_input_section(Relobj* object, unsigned int shndx, |
ead1e424 | 1025 | const char* secname, |
a2fb1b05 ILT |
1026 | const elfcpp::Shdr<size, big_endian>& shdr) |
1027 | { | |
1028 | elfcpp::Elf_Xword addralign = shdr.get_sh_addralign(); | |
1029 | if ((addralign & (addralign - 1)) != 0) | |
1030 | { | |
1031 | fprintf(stderr, _("%s: %s: invalid alignment %lu for section \"%s\"\n"), | |
1032 | program_name, object->name().c_str(), | |
1033 | static_cast<unsigned long>(addralign), secname); | |
1034 | gold_exit(false); | |
1035 | } | |
a2fb1b05 ILT |
1036 | |
1037 | if (addralign > this->addralign_) | |
1038 | this->addralign_ = addralign; | |
1039 | ||
b8e6aad9 ILT |
1040 | // If this is a SHF_MERGE section, we pass all the input sections to |
1041 | // a Output_data_merge. | |
1042 | if ((shdr.get_sh_flags() & elfcpp::SHF_MERGE) != 0) | |
1043 | { | |
1044 | if (this->add_merge_input_section(object, shndx, shdr.get_sh_flags(), | |
1045 | shdr.get_sh_entsize(), | |
1046 | addralign)) | |
1047 | { | |
1048 | // Tell the relocation routines that they need to call the | |
1049 | // output_address method to determine the final address. | |
1050 | return -1; | |
1051 | } | |
1052 | } | |
1053 | ||
c51e6221 ILT |
1054 | off_t offset_in_section = this->data_size(); |
1055 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
1056 | addralign); | |
1057 | ||
1058 | if (aligned_offset_in_section > offset_in_section | |
1059 | && (shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0 | |
1060 | && object->target()->has_code_fill()) | |
1061 | { | |
1062 | // We need to add some fill data. Using fill_list_ when | |
1063 | // possible is an optimization, since we will often have fill | |
1064 | // sections without input sections. | |
1065 | off_t fill_len = aligned_offset_in_section - offset_in_section; | |
1066 | if (this->input_sections_.empty()) | |
1067 | this->fills_.push_back(Fill(offset_in_section, fill_len)); | |
1068 | else | |
1069 | { | |
1070 | // FIXME: When relaxing, the size needs to adjust to | |
1071 | // maintain a constant alignment. | |
1072 | std::string fill_data(object->target()->code_fill(fill_len)); | |
1073 | Output_data_const* odc = new Output_data_const(fill_data, 1); | |
1074 | this->input_sections_.push_back(Input_section(odc)); | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | this->set_data_size(aligned_offset_in_section + shdr.get_sh_size()); | |
a2fb1b05 | 1079 | |
ead1e424 ILT |
1080 | // We need to keep track of this section if we are already keeping |
1081 | // track of sections, or if we are relaxing. FIXME: Add test for | |
1082 | // relaxing. | |
c51e6221 | 1083 | if (!this->input_sections_.empty()) |
ead1e424 ILT |
1084 | this->input_sections_.push_back(Input_section(object, shndx, |
1085 | shdr.get_sh_size(), | |
1086 | addralign)); | |
54dc6425 | 1087 | |
c51e6221 | 1088 | return aligned_offset_in_section; |
61ba1cf9 ILT |
1089 | } |
1090 | ||
ead1e424 ILT |
1091 | // Add arbitrary data to an output section. |
1092 | ||
1093 | void | |
1094 | Output_section::add_output_section_data(Output_section_data* posd) | |
1095 | { | |
b8e6aad9 ILT |
1096 | Input_section inp(posd); |
1097 | this->add_output_section_data(&inp); | |
1098 | } | |
1099 | ||
1100 | // Add arbitrary data to an output section by Input_section. | |
c06b7b0b | 1101 | |
b8e6aad9 ILT |
1102 | void |
1103 | Output_section::add_output_section_data(Input_section* inp) | |
1104 | { | |
ead1e424 ILT |
1105 | if (this->input_sections_.empty()) |
1106 | this->first_input_offset_ = this->data_size(); | |
c06b7b0b | 1107 | |
b8e6aad9 | 1108 | this->input_sections_.push_back(*inp); |
c06b7b0b | 1109 | |
b8e6aad9 | 1110 | uint64_t addralign = inp->addralign(); |
ead1e424 ILT |
1111 | if (addralign > this->addralign_) |
1112 | this->addralign_ = addralign; | |
c06b7b0b | 1113 | |
b8e6aad9 ILT |
1114 | inp->set_output_section(this); |
1115 | } | |
1116 | ||
1117 | // Add a merge section to an output section. | |
1118 | ||
1119 | void | |
1120 | Output_section::add_output_merge_section(Output_section_data* posd, | |
1121 | bool is_string, uint64_t entsize) | |
1122 | { | |
1123 | Input_section inp(posd, is_string, entsize); | |
1124 | this->add_output_section_data(&inp); | |
1125 | } | |
1126 | ||
1127 | // Add an input section to a SHF_MERGE section. | |
1128 | ||
1129 | bool | |
1130 | Output_section::add_merge_input_section(Relobj* object, unsigned int shndx, | |
1131 | uint64_t flags, uint64_t entsize, | |
1132 | uint64_t addralign) | |
1133 | { | |
1134 | // We only merge constants if the alignment is not more than the | |
1135 | // entry size. This could be handled, but it's unusual. | |
1136 | if (addralign > entsize) | |
1137 | return false; | |
1138 | ||
1139 | bool is_string = (flags & elfcpp::SHF_STRINGS) != 0; | |
1140 | Input_section_list::iterator p; | |
1141 | for (p = this->input_sections_.begin(); | |
1142 | p != this->input_sections_.end(); | |
1143 | ++p) | |
1144 | if (p->is_merge_section(is_string, entsize)) | |
1145 | break; | |
1146 | ||
1147 | // We handle the actual constant merging in Output_merge_data or | |
1148 | // Output_merge_string_data. | |
1149 | if (p != this->input_sections_.end()) | |
1150 | p->add_input_section(object, shndx); | |
1151 | else | |
1152 | { | |
1153 | Output_section_data* posd; | |
1154 | if (!is_string) | |
1155 | posd = new Output_merge_data(entsize); | |
1156 | else if (entsize == 1) | |
1157 | posd = new Output_merge_string<char>(); | |
1158 | else if (entsize == 2) | |
1159 | posd = new Output_merge_string<uint16_t>(); | |
1160 | else if (entsize == 4) | |
1161 | posd = new Output_merge_string<uint32_t>(); | |
1162 | else | |
1163 | return false; | |
1164 | ||
1165 | this->add_output_merge_section(posd, is_string, entsize); | |
1166 | posd->add_input_section(object, shndx); | |
1167 | } | |
1168 | ||
1169 | return true; | |
1170 | } | |
1171 | ||
1172 | // Return the output virtual address of OFFSET relative to the start | |
1173 | // of input section SHNDX in object OBJECT. | |
1174 | ||
1175 | uint64_t | |
1176 | Output_section::output_address(const Relobj* object, unsigned int shndx, | |
1177 | off_t offset) const | |
1178 | { | |
1179 | uint64_t addr = this->address() + this->first_input_offset_; | |
1180 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1181 | p != this->input_sections_.end(); | |
1182 | ++p) | |
1183 | { | |
1184 | addr = align_address(addr, p->addralign()); | |
1185 | uint64_t output; | |
1186 | if (p->output_address(object, shndx, offset, addr, &output)) | |
1187 | return output; | |
1188 | addr += p->data_size(); | |
1189 | } | |
1190 | ||
1191 | // If we get here, it means that we don't know the mapping for this | |
1192 | // input section. This might happen in principle if | |
1193 | // add_input_section were called before add_output_section_data. | |
1194 | // But it should never actually happen. | |
1195 | ||
1196 | gold_unreachable(); | |
ead1e424 ILT |
1197 | } |
1198 | ||
1199 | // Set the address of an Output_section. This is where we handle | |
1200 | // setting the addresses of any Output_section_data objects. | |
1201 | ||
1202 | void | |
1203 | Output_section::do_set_address(uint64_t address, off_t startoff) | |
1204 | { | |
1205 | if (this->input_sections_.empty()) | |
1206 | return; | |
1207 | ||
1208 | off_t off = startoff + this->first_input_offset_; | |
1209 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
1210 | p != this->input_sections_.end(); | |
1211 | ++p) | |
1212 | { | |
1213 | off = align_address(off, p->addralign()); | |
1214 | p->set_address(address + (off - startoff), off, startoff); | |
1215 | off += p->data_size(); | |
1216 | } | |
1217 | ||
1218 | this->set_data_size(off - startoff); | |
1219 | } | |
1220 | ||
61ba1cf9 ILT |
1221 | // Write the section header to *OSHDR. |
1222 | ||
1223 | template<int size, bool big_endian> | |
1224 | void | |
16649710 ILT |
1225 | Output_section::write_header(const Layout* layout, |
1226 | const Stringpool* secnamepool, | |
61ba1cf9 ILT |
1227 | elfcpp::Shdr_write<size, big_endian>* oshdr) const |
1228 | { | |
1229 | oshdr->put_sh_name(secnamepool->get_offset(this->name_)); | |
1230 | oshdr->put_sh_type(this->type_); | |
1231 | oshdr->put_sh_flags(this->flags_); | |
1232 | oshdr->put_sh_addr(this->address()); | |
1233 | oshdr->put_sh_offset(this->offset()); | |
1234 | oshdr->put_sh_size(this->data_size()); | |
16649710 ILT |
1235 | if (this->link_section_ != NULL) |
1236 | oshdr->put_sh_link(this->link_section_->out_shndx()); | |
1237 | else if (this->should_link_to_symtab_) | |
1238 | oshdr->put_sh_link(layout->symtab_section()->out_shndx()); | |
1239 | else if (this->should_link_to_dynsym_) | |
1240 | oshdr->put_sh_link(layout->dynsym_section()->out_shndx()); | |
1241 | else | |
1242 | oshdr->put_sh_link(this->link_); | |
1243 | if (this->info_section_ != NULL) | |
1244 | oshdr->put_sh_info(this->info_section_->out_shndx()); | |
1245 | else | |
1246 | oshdr->put_sh_info(this->info_); | |
61ba1cf9 ILT |
1247 | oshdr->put_sh_addralign(this->addralign_); |
1248 | oshdr->put_sh_entsize(this->entsize_); | |
a2fb1b05 ILT |
1249 | } |
1250 | ||
ead1e424 ILT |
1251 | // Write out the data. For input sections the data is written out by |
1252 | // Object::relocate, but we have to handle Output_section_data objects | |
1253 | // here. | |
1254 | ||
1255 | void | |
1256 | Output_section::do_write(Output_file* of) | |
1257 | { | |
c51e6221 ILT |
1258 | off_t output_section_file_offset = this->offset(); |
1259 | for (Fill_list::iterator p = this->fills_.begin(); | |
1260 | p != this->fills_.end(); | |
1261 | ++p) | |
1262 | { | |
1263 | std::string fill_data(of->target()->code_fill(p->length())); | |
1264 | of->write(output_section_file_offset + p->section_offset(), | |
1265 | fill_data.data(), fill_data.size()); | |
1266 | } | |
1267 | ||
ead1e424 ILT |
1268 | for (Input_section_list::iterator p = this->input_sections_.begin(); |
1269 | p != this->input_sections_.end(); | |
1270 | ++p) | |
1271 | p->write(of); | |
1272 | } | |
1273 | ||
a2fb1b05 ILT |
1274 | // Output segment methods. |
1275 | ||
1276 | Output_segment::Output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags) | |
54dc6425 | 1277 | : output_data_(), |
75f65a3e | 1278 | output_bss_(), |
a2fb1b05 ILT |
1279 | vaddr_(0), |
1280 | paddr_(0), | |
1281 | memsz_(0), | |
1282 | align_(0), | |
1283 | offset_(0), | |
1284 | filesz_(0), | |
1285 | type_(type), | |
ead1e424 ILT |
1286 | flags_(flags), |
1287 | is_align_known_(false) | |
a2fb1b05 ILT |
1288 | { |
1289 | } | |
1290 | ||
1291 | // Add an Output_section to an Output_segment. | |
1292 | ||
1293 | void | |
75f65a3e | 1294 | Output_segment::add_output_section(Output_section* os, |
dbe717ef ILT |
1295 | elfcpp::Elf_Word seg_flags, |
1296 | bool front) | |
a2fb1b05 | 1297 | { |
a3ad94ed ILT |
1298 | gold_assert((os->flags() & elfcpp::SHF_ALLOC) != 0); |
1299 | gold_assert(!this->is_align_known_); | |
75f65a3e | 1300 | |
ead1e424 | 1301 | // Update the segment flags. |
75f65a3e | 1302 | this->flags_ |= seg_flags; |
75f65a3e ILT |
1303 | |
1304 | Output_segment::Output_data_list* pdl; | |
1305 | if (os->type() == elfcpp::SHT_NOBITS) | |
1306 | pdl = &this->output_bss_; | |
1307 | else | |
1308 | pdl = &this->output_data_; | |
54dc6425 | 1309 | |
a2fb1b05 ILT |
1310 | // So that PT_NOTE segments will work correctly, we need to ensure |
1311 | // that all SHT_NOTE sections are adjacent. This will normally | |
1312 | // happen automatically, because all the SHT_NOTE input sections | |
1313 | // will wind up in the same output section. However, it is possible | |
1314 | // for multiple SHT_NOTE input sections to have different section | |
1315 | // flags, and thus be in different output sections, but for the | |
1316 | // different section flags to map into the same segment flags and | |
1317 | // thus the same output segment. | |
54dc6425 ILT |
1318 | |
1319 | // Note that while there may be many input sections in an output | |
1320 | // section, there are normally only a few output sections in an | |
1321 | // output segment. This loop is expected to be fast. | |
1322 | ||
61ba1cf9 | 1323 | if (os->type() == elfcpp::SHT_NOTE && !pdl->empty()) |
a2fb1b05 | 1324 | { |
a3ad94ed | 1325 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 1326 | do |
54dc6425 | 1327 | { |
75f65a3e | 1328 | --p; |
54dc6425 ILT |
1329 | if ((*p)->is_section_type(elfcpp::SHT_NOTE)) |
1330 | { | |
dbe717ef | 1331 | // We don't worry about the FRONT parameter. |
54dc6425 | 1332 | ++p; |
75f65a3e | 1333 | pdl->insert(p, os); |
54dc6425 ILT |
1334 | return; |
1335 | } | |
1336 | } | |
75f65a3e | 1337 | while (p != pdl->begin()); |
54dc6425 ILT |
1338 | } |
1339 | ||
1340 | // Similarly, so that PT_TLS segments will work, we need to group | |
75f65a3e ILT |
1341 | // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special |
1342 | // case: we group the SHF_TLS/SHT_NOBITS sections right after the | |
1343 | // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS | |
1344 | // correctly. | |
61ba1cf9 | 1345 | if ((os->flags() & elfcpp::SHF_TLS) != 0 && !this->output_data_.empty()) |
54dc6425 | 1346 | { |
75f65a3e ILT |
1347 | pdl = &this->output_data_; |
1348 | bool nobits = os->type() == elfcpp::SHT_NOBITS; | |
ead1e424 | 1349 | bool sawtls = false; |
a3ad94ed | 1350 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 1351 | do |
a2fb1b05 | 1352 | { |
75f65a3e | 1353 | --p; |
ead1e424 ILT |
1354 | bool insert; |
1355 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
1356 | { | |
1357 | sawtls = true; | |
1358 | // Put a NOBITS section after the first TLS section. | |
1359 | // But a PROGBITS section after the first TLS/PROGBITS | |
1360 | // section. | |
1361 | insert = nobits || !(*p)->is_section_type(elfcpp::SHT_NOBITS); | |
1362 | } | |
1363 | else | |
1364 | { | |
1365 | // If we've gone past the TLS sections, but we've seen a | |
1366 | // TLS section, then we need to insert this section now. | |
1367 | insert = sawtls; | |
1368 | } | |
1369 | ||
1370 | if (insert) | |
a2fb1b05 | 1371 | { |
dbe717ef | 1372 | // We don't worry about the FRONT parameter. |
a2fb1b05 | 1373 | ++p; |
75f65a3e | 1374 | pdl->insert(p, os); |
a2fb1b05 ILT |
1375 | return; |
1376 | } | |
1377 | } | |
75f65a3e | 1378 | while (p != pdl->begin()); |
ead1e424 | 1379 | |
dbe717ef ILT |
1380 | // There are no TLS sections yet; put this one at the requested |
1381 | // location in the section list. | |
a2fb1b05 ILT |
1382 | } |
1383 | ||
dbe717ef ILT |
1384 | if (front) |
1385 | pdl->push_front(os); | |
1386 | else | |
1387 | pdl->push_back(os); | |
75f65a3e ILT |
1388 | } |
1389 | ||
1390 | // Add an Output_data (which is not an Output_section) to the start of | |
1391 | // a segment. | |
1392 | ||
1393 | void | |
1394 | Output_segment::add_initial_output_data(Output_data* od) | |
1395 | { | |
a3ad94ed | 1396 | gold_assert(!this->is_align_known_); |
75f65a3e ILT |
1397 | this->output_data_.push_front(od); |
1398 | } | |
1399 | ||
1400 | // Return the maximum alignment of the Output_data in Output_segment. | |
ead1e424 | 1401 | // Once we compute this, we prohibit new sections from being added. |
75f65a3e ILT |
1402 | |
1403 | uint64_t | |
ead1e424 | 1404 | Output_segment::addralign() |
75f65a3e | 1405 | { |
ead1e424 ILT |
1406 | if (!this->is_align_known_) |
1407 | { | |
1408 | uint64_t addralign; | |
1409 | ||
1410 | addralign = Output_segment::maximum_alignment(&this->output_data_); | |
1411 | if (addralign > this->align_) | |
1412 | this->align_ = addralign; | |
1413 | ||
1414 | addralign = Output_segment::maximum_alignment(&this->output_bss_); | |
1415 | if (addralign > this->align_) | |
1416 | this->align_ = addralign; | |
1417 | ||
1418 | this->is_align_known_ = true; | |
1419 | } | |
1420 | ||
75f65a3e ILT |
1421 | return this->align_; |
1422 | } | |
1423 | ||
ead1e424 ILT |
1424 | // Return the maximum alignment of a list of Output_data. |
1425 | ||
1426 | uint64_t | |
1427 | Output_segment::maximum_alignment(const Output_data_list* pdl) | |
1428 | { | |
1429 | uint64_t ret = 0; | |
1430 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1431 | p != pdl->end(); | |
1432 | ++p) | |
1433 | { | |
1434 | uint64_t addralign = (*p)->addralign(); | |
1435 | if (addralign > ret) | |
1436 | ret = addralign; | |
1437 | } | |
1438 | return ret; | |
1439 | } | |
1440 | ||
75f65a3e | 1441 | // Set the section addresses for an Output_segment. ADDR is the |
ead1e424 ILT |
1442 | // address and *POFF is the file offset. Set the section indexes |
1443 | // starting with *PSHNDX. Return the address of the immediately | |
1444 | // following segment. Update *POFF and *PSHNDX. | |
75f65a3e ILT |
1445 | |
1446 | uint64_t | |
ead1e424 ILT |
1447 | Output_segment::set_section_addresses(uint64_t addr, off_t* poff, |
1448 | unsigned int* pshndx) | |
75f65a3e | 1449 | { |
a3ad94ed | 1450 | gold_assert(this->type_ == elfcpp::PT_LOAD); |
75f65a3e ILT |
1451 | |
1452 | this->vaddr_ = addr; | |
1453 | this->paddr_ = addr; | |
1454 | ||
1455 | off_t orig_off = *poff; | |
1456 | this->offset_ = orig_off; | |
1457 | ||
ead1e424 ILT |
1458 | *poff = align_address(*poff, this->addralign()); |
1459 | ||
1460 | addr = this->set_section_list_addresses(&this->output_data_, addr, poff, | |
1461 | pshndx); | |
75f65a3e ILT |
1462 | this->filesz_ = *poff - orig_off; |
1463 | ||
1464 | off_t off = *poff; | |
1465 | ||
61ba1cf9 | 1466 | uint64_t ret = this->set_section_list_addresses(&this->output_bss_, addr, |
ead1e424 | 1467 | poff, pshndx); |
75f65a3e ILT |
1468 | this->memsz_ = *poff - orig_off; |
1469 | ||
1470 | // Ignore the file offset adjustments made by the BSS Output_data | |
1471 | // objects. | |
1472 | *poff = off; | |
61ba1cf9 ILT |
1473 | |
1474 | return ret; | |
75f65a3e ILT |
1475 | } |
1476 | ||
b8e6aad9 ILT |
1477 | // Set the addresses and file offsets in a list of Output_data |
1478 | // structures. | |
75f65a3e ILT |
1479 | |
1480 | uint64_t | |
1481 | Output_segment::set_section_list_addresses(Output_data_list* pdl, | |
ead1e424 ILT |
1482 | uint64_t addr, off_t* poff, |
1483 | unsigned int* pshndx) | |
75f65a3e | 1484 | { |
ead1e424 | 1485 | off_t startoff = *poff; |
75f65a3e | 1486 | |
ead1e424 | 1487 | off_t off = startoff; |
75f65a3e ILT |
1488 | for (Output_data_list::iterator p = pdl->begin(); |
1489 | p != pdl->end(); | |
1490 | ++p) | |
1491 | { | |
ead1e424 ILT |
1492 | off = align_address(off, (*p)->addralign()); |
1493 | (*p)->set_address(addr + (off - startoff), off); | |
1494 | ||
1495 | // Unless this is a PT_TLS segment, we want to ignore the size | |
1496 | // of a SHF_TLS/SHT_NOBITS section. Such a section does not | |
1497 | // affect the size of a PT_LOAD segment. | |
1498 | if (this->type_ == elfcpp::PT_TLS | |
1499 | || !(*p)->is_section_flag_set(elfcpp::SHF_TLS) | |
1500 | || !(*p)->is_section_type(elfcpp::SHT_NOBITS)) | |
1501 | off += (*p)->data_size(); | |
75f65a3e | 1502 | |
ead1e424 ILT |
1503 | if ((*p)->is_section()) |
1504 | { | |
1505 | (*p)->set_out_shndx(*pshndx); | |
1506 | ++*pshndx; | |
1507 | } | |
75f65a3e ILT |
1508 | } |
1509 | ||
1510 | *poff = off; | |
ead1e424 | 1511 | return addr + (off - startoff); |
75f65a3e ILT |
1512 | } |
1513 | ||
1514 | // For a non-PT_LOAD segment, set the offset from the sections, if | |
1515 | // any. | |
1516 | ||
1517 | void | |
1518 | Output_segment::set_offset() | |
1519 | { | |
a3ad94ed | 1520 | gold_assert(this->type_ != elfcpp::PT_LOAD); |
75f65a3e ILT |
1521 | |
1522 | if (this->output_data_.empty() && this->output_bss_.empty()) | |
1523 | { | |
1524 | this->vaddr_ = 0; | |
1525 | this->paddr_ = 0; | |
1526 | this->memsz_ = 0; | |
1527 | this->align_ = 0; | |
1528 | this->offset_ = 0; | |
1529 | this->filesz_ = 0; | |
1530 | return; | |
1531 | } | |
1532 | ||
1533 | const Output_data* first; | |
1534 | if (this->output_data_.empty()) | |
1535 | first = this->output_bss_.front(); | |
1536 | else | |
1537 | first = this->output_data_.front(); | |
1538 | this->vaddr_ = first->address(); | |
1539 | this->paddr_ = this->vaddr_; | |
1540 | this->offset_ = first->offset(); | |
1541 | ||
1542 | if (this->output_data_.empty()) | |
1543 | this->filesz_ = 0; | |
1544 | else | |
1545 | { | |
1546 | const Output_data* last_data = this->output_data_.back(); | |
1547 | this->filesz_ = (last_data->address() | |
1548 | + last_data->data_size() | |
1549 | - this->vaddr_); | |
1550 | } | |
1551 | ||
1552 | const Output_data* last; | |
1553 | if (this->output_bss_.empty()) | |
1554 | last = this->output_data_.back(); | |
1555 | else | |
1556 | last = this->output_bss_.back(); | |
1557 | this->memsz_ = (last->address() | |
1558 | + last->data_size() | |
1559 | - this->vaddr_); | |
75f65a3e ILT |
1560 | } |
1561 | ||
1562 | // Return the number of Output_sections in an Output_segment. | |
1563 | ||
1564 | unsigned int | |
1565 | Output_segment::output_section_count() const | |
1566 | { | |
1567 | return (this->output_section_count_list(&this->output_data_) | |
1568 | + this->output_section_count_list(&this->output_bss_)); | |
1569 | } | |
1570 | ||
1571 | // Return the number of Output_sections in an Output_data_list. | |
1572 | ||
1573 | unsigned int | |
1574 | Output_segment::output_section_count_list(const Output_data_list* pdl) const | |
1575 | { | |
1576 | unsigned int count = 0; | |
1577 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1578 | p != pdl->end(); | |
1579 | ++p) | |
1580 | { | |
1581 | if ((*p)->is_section()) | |
1582 | ++count; | |
1583 | } | |
1584 | return count; | |
a2fb1b05 ILT |
1585 | } |
1586 | ||
61ba1cf9 ILT |
1587 | // Write the segment data into *OPHDR. |
1588 | ||
1589 | template<int size, bool big_endian> | |
1590 | void | |
ead1e424 | 1591 | Output_segment::write_header(elfcpp::Phdr_write<size, big_endian>* ophdr) |
61ba1cf9 ILT |
1592 | { |
1593 | ophdr->put_p_type(this->type_); | |
1594 | ophdr->put_p_offset(this->offset_); | |
1595 | ophdr->put_p_vaddr(this->vaddr_); | |
1596 | ophdr->put_p_paddr(this->paddr_); | |
1597 | ophdr->put_p_filesz(this->filesz_); | |
1598 | ophdr->put_p_memsz(this->memsz_); | |
1599 | ophdr->put_p_flags(this->flags_); | |
ead1e424 | 1600 | ophdr->put_p_align(this->addralign()); |
61ba1cf9 ILT |
1601 | } |
1602 | ||
1603 | // Write the section headers into V. | |
1604 | ||
1605 | template<int size, bool big_endian> | |
1606 | unsigned char* | |
16649710 ILT |
1607 | Output_segment::write_section_headers(const Layout* layout, |
1608 | const Stringpool* secnamepool, | |
ead1e424 ILT |
1609 | unsigned char* v, |
1610 | unsigned int *pshndx | |
5482377d ILT |
1611 | ACCEPT_SIZE_ENDIAN) const |
1612 | { | |
ead1e424 ILT |
1613 | // Every section that is attached to a segment must be attached to a |
1614 | // PT_LOAD segment, so we only write out section headers for PT_LOAD | |
1615 | // segments. | |
1616 | if (this->type_ != elfcpp::PT_LOAD) | |
1617 | return v; | |
1618 | ||
593f47df ILT |
1619 | v = this->write_section_headers_list |
1620 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 1621 | layout, secnamepool, &this->output_data_, v, pshndx |
593f47df ILT |
1622 | SELECT_SIZE_ENDIAN(size, big_endian)); |
1623 | v = this->write_section_headers_list | |
1624 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 1625 | layout, secnamepool, &this->output_bss_, v, pshndx |
593f47df | 1626 | SELECT_SIZE_ENDIAN(size, big_endian)); |
61ba1cf9 ILT |
1627 | return v; |
1628 | } | |
1629 | ||
1630 | template<int size, bool big_endian> | |
1631 | unsigned char* | |
16649710 ILT |
1632 | Output_segment::write_section_headers_list(const Layout* layout, |
1633 | const Stringpool* secnamepool, | |
61ba1cf9 | 1634 | const Output_data_list* pdl, |
ead1e424 ILT |
1635 | unsigned char* v, |
1636 | unsigned int* pshndx | |
5482377d | 1637 | ACCEPT_SIZE_ENDIAN) const |
61ba1cf9 ILT |
1638 | { |
1639 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1640 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1641 | p != pdl->end(); | |
1642 | ++p) | |
1643 | { | |
1644 | if ((*p)->is_section()) | |
1645 | { | |
5482377d | 1646 | const Output_section* ps = static_cast<const Output_section*>(*p); |
a3ad94ed | 1647 | gold_assert(*pshndx == ps->out_shndx()); |
61ba1cf9 | 1648 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 1649 | ps->write_header(layout, secnamepool, &oshdr); |
61ba1cf9 | 1650 | v += shdr_size; |
ead1e424 | 1651 | ++*pshndx; |
61ba1cf9 ILT |
1652 | } |
1653 | } | |
1654 | return v; | |
1655 | } | |
1656 | ||
a2fb1b05 ILT |
1657 | // Output_file methods. |
1658 | ||
c51e6221 | 1659 | Output_file::Output_file(const General_options& options, Target* target) |
61ba1cf9 | 1660 | : options_(options), |
c51e6221 | 1661 | target_(target), |
61ba1cf9 ILT |
1662 | name_(options.output_file_name()), |
1663 | o_(-1), | |
1664 | file_size_(0), | |
1665 | base_(NULL) | |
1666 | { | |
1667 | } | |
1668 | ||
1669 | // Open the output file. | |
1670 | ||
a2fb1b05 | 1671 | void |
61ba1cf9 | 1672 | Output_file::open(off_t file_size) |
a2fb1b05 | 1673 | { |
61ba1cf9 ILT |
1674 | this->file_size_ = file_size; |
1675 | ||
4e9d8586 ILT |
1676 | // Unlink the file first; otherwise the open() may fail if the file |
1677 | // is busy (e.g. it's an executable that's currently being executed). | |
1678 | // | |
1679 | // However, the linker may be part of a system where a zero-length | |
1680 | // file is created for it to write to, with tight permissions (gcc | |
1681 | // 2.95 did something like this). Unlinking the file would work | |
1682 | // around those permission controls, so we only unlink if the file | |
1683 | // has a non-zero size. We also unlink only regular files to avoid | |
1684 | // trouble with directories/etc. | |
1685 | // | |
1686 | // If we fail, continue; this command is merely a best-effort attempt | |
1687 | // to improve the odds for open(). | |
1688 | ||
1689 | // FIXME: unlink the file if it's a symlink, even a symlink to a dir. | |
1690 | // Or do we want to follow the symlink and unlink its target? | |
1691 | struct stat s; | |
1692 | if (::stat(this->name_, &s) == 0 && s.st_size != 0 && S_ISREG(s.st_mode)) | |
1693 | ::unlink(this->name_); | |
1694 | ||
7e1edb90 | 1695 | int mode = parameters->output_is_object() ? 0666 : 0777; |
61ba1cf9 ILT |
1696 | int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode); |
1697 | if (o < 0) | |
1698 | { | |
1699 | fprintf(stderr, _("%s: %s: open: %s\n"), | |
1700 | program_name, this->name_, strerror(errno)); | |
1701 | gold_exit(false); | |
1702 | } | |
1703 | this->o_ = o; | |
1704 | ||
1705 | // Write out one byte to make the file the right size. | |
1706 | if (::lseek(o, file_size - 1, SEEK_SET) < 0) | |
1707 | { | |
1708 | fprintf(stderr, _("%s: %s: lseek: %s\n"), | |
1709 | program_name, this->name_, strerror(errno)); | |
1710 | gold_exit(false); | |
1711 | } | |
1712 | char b = 0; | |
1713 | if (::write(o, &b, 1) != 1) | |
1714 | { | |
1715 | fprintf(stderr, _("%s: %s: write: %s\n"), | |
1716 | program_name, this->name_, strerror(errno)); | |
1717 | gold_exit(false); | |
1718 | } | |
1719 | ||
1720 | // Map the file into memory. | |
1721 | void* base = ::mmap(NULL, file_size, PROT_READ | PROT_WRITE, | |
1722 | MAP_SHARED, o, 0); | |
1723 | if (base == MAP_FAILED) | |
1724 | { | |
1725 | fprintf(stderr, _("%s: %s: mmap: %s\n"), | |
1726 | program_name, this->name_, strerror(errno)); | |
1727 | gold_exit(false); | |
1728 | } | |
1729 | this->base_ = static_cast<unsigned char*>(base); | |
1730 | } | |
1731 | ||
1732 | // Close the output file. | |
1733 | ||
1734 | void | |
1735 | Output_file::close() | |
1736 | { | |
1737 | if (::munmap(this->base_, this->file_size_) < 0) | |
1738 | { | |
1739 | fprintf(stderr, _("%s: %s: munmap: %s\n"), | |
1740 | program_name, this->name_, strerror(errno)); | |
1741 | gold_exit(false); | |
1742 | } | |
1743 | this->base_ = NULL; | |
1744 | ||
1745 | if (::close(this->o_) < 0) | |
1746 | { | |
1747 | fprintf(stderr, _("%s: %s: close: %s\n"), | |
1748 | program_name, this->name_, strerror(errno)); | |
1749 | gold_exit(false); | |
1750 | } | |
1751 | this->o_ = -1; | |
a2fb1b05 ILT |
1752 | } |
1753 | ||
1754 | // Instantiate the templates we need. We could use the configure | |
1755 | // script to restrict this to only the ones for implemented targets. | |
1756 | ||
193a53d9 | 1757 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
1758 | template |
1759 | off_t | |
1760 | Output_section::add_input_section<32, false>( | |
f6ce93d6 | 1761 | Relobj* object, |
ead1e424 | 1762 | unsigned int shndx, |
a2fb1b05 ILT |
1763 | const char* secname, |
1764 | const elfcpp::Shdr<32, false>& shdr); | |
193a53d9 | 1765 | #endif |
a2fb1b05 | 1766 | |
193a53d9 | 1767 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
1768 | template |
1769 | off_t | |
1770 | Output_section::add_input_section<32, true>( | |
f6ce93d6 | 1771 | Relobj* object, |
ead1e424 | 1772 | unsigned int shndx, |
a2fb1b05 ILT |
1773 | const char* secname, |
1774 | const elfcpp::Shdr<32, true>& shdr); | |
193a53d9 | 1775 | #endif |
a2fb1b05 | 1776 | |
193a53d9 | 1777 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
1778 | template |
1779 | off_t | |
1780 | Output_section::add_input_section<64, false>( | |
f6ce93d6 | 1781 | Relobj* object, |
ead1e424 | 1782 | unsigned int shndx, |
a2fb1b05 ILT |
1783 | const char* secname, |
1784 | const elfcpp::Shdr<64, false>& shdr); | |
193a53d9 | 1785 | #endif |
a2fb1b05 | 1786 | |
193a53d9 | 1787 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
1788 | template |
1789 | off_t | |
1790 | Output_section::add_input_section<64, true>( | |
f6ce93d6 | 1791 | Relobj* object, |
ead1e424 | 1792 | unsigned int shndx, |
a2fb1b05 ILT |
1793 | const char* secname, |
1794 | const elfcpp::Shdr<64, true>& shdr); | |
193a53d9 | 1795 | #endif |
a2fb1b05 | 1796 | |
193a53d9 | 1797 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1798 | template |
1799 | class Output_data_reloc<elfcpp::SHT_REL, false, 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, false, 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, false, 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, false, 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_REL, true, 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_REL, true, 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_REL, true, 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_REL, true, 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, false, 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, false, 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, false, 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, false, 64, true>; | |
193a53d9 | 1855 | #endif |
c06b7b0b | 1856 | |
193a53d9 | 1857 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1858 | template |
1859 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
193a53d9 | 1860 | #endif |
c06b7b0b | 1861 | |
193a53d9 | 1862 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1863 | template |
1864 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
193a53d9 | 1865 | #endif |
c06b7b0b | 1866 | |
193a53d9 | 1867 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1868 | template |
1869 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
193a53d9 | 1870 | #endif |
c06b7b0b | 1871 | |
193a53d9 | 1872 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1873 | template |
1874 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
193a53d9 | 1875 | #endif |
c06b7b0b | 1876 | |
193a53d9 | 1877 | #ifdef HAVE_TARGET_32_LITTLE |
ead1e424 | 1878 | template |
dbe717ef | 1879 | class Output_data_got<32, false>; |
193a53d9 | 1880 | #endif |
ead1e424 | 1881 | |
193a53d9 | 1882 | #ifdef HAVE_TARGET_32_BIG |
ead1e424 | 1883 | template |
dbe717ef | 1884 | class Output_data_got<32, true>; |
193a53d9 | 1885 | #endif |
ead1e424 | 1886 | |
193a53d9 | 1887 | #ifdef HAVE_TARGET_64_LITTLE |
ead1e424 | 1888 | template |
dbe717ef | 1889 | class Output_data_got<64, false>; |
193a53d9 | 1890 | #endif |
ead1e424 | 1891 | |
193a53d9 | 1892 | #ifdef HAVE_TARGET_64_BIG |
ead1e424 | 1893 | template |
dbe717ef | 1894 | class Output_data_got<64, true>; |
193a53d9 | 1895 | #endif |
ead1e424 | 1896 | |
a2fb1b05 | 1897 | } // End namespace gold. |