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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> |
5ffcaa86 | 32 | #include "libiberty.h" // for unlink_if_ordinary() |
a2fb1b05 | 33 | |
7e1edb90 | 34 | #include "parameters.h" |
a2fb1b05 | 35 | #include "object.h" |
ead1e424 ILT |
36 | #include "symtab.h" |
37 | #include "reloc.h" | |
b8e6aad9 | 38 | #include "merge.h" |
a2fb1b05 ILT |
39 | #include "output.h" |
40 | ||
41 | namespace gold | |
42 | { | |
43 | ||
a3ad94ed ILT |
44 | // Output_data variables. |
45 | ||
46 | bool Output_data::sizes_are_fixed; | |
47 | ||
a2fb1b05 ILT |
48 | // Output_data methods. |
49 | ||
50 | Output_data::~Output_data() | |
51 | { | |
52 | } | |
53 | ||
75f65a3e ILT |
54 | // Set the address and offset. |
55 | ||
56 | void | |
57 | Output_data::set_address(uint64_t addr, off_t off) | |
58 | { | |
59 | this->address_ = addr; | |
60 | this->offset_ = off; | |
61 | ||
62 | // Let the child class know. | |
63 | this->do_set_address(addr, off); | |
64 | } | |
65 | ||
66 | // Return the default alignment for a size--32 or 64. | |
67 | ||
68 | uint64_t | |
69 | Output_data::default_alignment(int size) | |
70 | { | |
71 | if (size == 32) | |
72 | return 4; | |
73 | else if (size == 64) | |
74 | return 8; | |
75 | else | |
a3ad94ed | 76 | gold_unreachable(); |
75f65a3e ILT |
77 | } |
78 | ||
75f65a3e ILT |
79 | // Output_section_header methods. This currently assumes that the |
80 | // segment and section lists are complete at construction time. | |
81 | ||
82 | Output_section_headers::Output_section_headers( | |
16649710 ILT |
83 | const Layout* layout, |
84 | const Layout::Segment_list* segment_list, | |
85 | const Layout::Section_list* unattached_section_list, | |
61ba1cf9 | 86 | const Stringpool* secnamepool) |
9025d29d | 87 | : layout_(layout), |
75f65a3e | 88 | segment_list_(segment_list), |
a3ad94ed | 89 | unattached_section_list_(unattached_section_list), |
61ba1cf9 | 90 | secnamepool_(secnamepool) |
75f65a3e | 91 | { |
61ba1cf9 ILT |
92 | // Count all the sections. Start with 1 for the null section. |
93 | off_t count = 1; | |
16649710 ILT |
94 | for (Layout::Segment_list::const_iterator p = segment_list->begin(); |
95 | p != segment_list->end(); | |
75f65a3e | 96 | ++p) |
ead1e424 ILT |
97 | if ((*p)->type() == elfcpp::PT_LOAD) |
98 | count += (*p)->output_section_count(); | |
16649710 | 99 | count += unattached_section_list->size(); |
75f65a3e | 100 | |
9025d29d | 101 | const int size = parameters->get_size(); |
75f65a3e ILT |
102 | int shdr_size; |
103 | if (size == 32) | |
104 | shdr_size = elfcpp::Elf_sizes<32>::shdr_size; | |
105 | else if (size == 64) | |
106 | shdr_size = elfcpp::Elf_sizes<64>::shdr_size; | |
107 | else | |
a3ad94ed | 108 | gold_unreachable(); |
75f65a3e ILT |
109 | |
110 | this->set_data_size(count * shdr_size); | |
111 | } | |
112 | ||
61ba1cf9 ILT |
113 | // Write out the section headers. |
114 | ||
75f65a3e | 115 | void |
61ba1cf9 | 116 | Output_section_headers::do_write(Output_file* of) |
a2fb1b05 | 117 | { |
9025d29d | 118 | if (parameters->get_size() == 32) |
61ba1cf9 | 119 | { |
9025d29d ILT |
120 | if (parameters->is_big_endian()) |
121 | { | |
122 | #ifdef HAVE_TARGET_32_BIG | |
123 | this->do_sized_write<32, true>(of); | |
124 | #else | |
125 | gold_unreachable(); | |
126 | #endif | |
127 | } | |
61ba1cf9 | 128 | else |
9025d29d ILT |
129 | { |
130 | #ifdef HAVE_TARGET_32_LITTLE | |
131 | this->do_sized_write<32, false>(of); | |
132 | #else | |
133 | gold_unreachable(); | |
134 | #endif | |
135 | } | |
61ba1cf9 | 136 | } |
9025d29d | 137 | else if (parameters->get_size() == 64) |
61ba1cf9 | 138 | { |
9025d29d ILT |
139 | if (parameters->is_big_endian()) |
140 | { | |
141 | #ifdef HAVE_TARGET_64_BIG | |
142 | this->do_sized_write<64, true>(of); | |
143 | #else | |
144 | gold_unreachable(); | |
145 | #endif | |
146 | } | |
61ba1cf9 | 147 | else |
9025d29d ILT |
148 | { |
149 | #ifdef HAVE_TARGET_64_LITTLE | |
150 | this->do_sized_write<64, false>(of); | |
151 | #else | |
152 | gold_unreachable(); | |
153 | #endif | |
154 | } | |
61ba1cf9 ILT |
155 | } |
156 | else | |
a3ad94ed | 157 | gold_unreachable(); |
61ba1cf9 ILT |
158 | } |
159 | ||
160 | template<int size, bool big_endian> | |
161 | void | |
162 | Output_section_headers::do_sized_write(Output_file* of) | |
163 | { | |
164 | off_t all_shdrs_size = this->data_size(); | |
165 | unsigned char* view = of->get_output_view(this->offset(), all_shdrs_size); | |
166 | ||
167 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
168 | unsigned char* v = view; | |
169 | ||
170 | { | |
171 | typename elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
172 | oshdr.put_sh_name(0); | |
173 | oshdr.put_sh_type(elfcpp::SHT_NULL); | |
174 | oshdr.put_sh_flags(0); | |
175 | oshdr.put_sh_addr(0); | |
176 | oshdr.put_sh_offset(0); | |
177 | oshdr.put_sh_size(0); | |
178 | oshdr.put_sh_link(0); | |
179 | oshdr.put_sh_info(0); | |
180 | oshdr.put_sh_addralign(0); | |
181 | oshdr.put_sh_entsize(0); | |
182 | } | |
183 | ||
184 | v += shdr_size; | |
185 | ||
ead1e424 | 186 | unsigned shndx = 1; |
16649710 ILT |
187 | for (Layout::Segment_list::const_iterator p = this->segment_list_->begin(); |
188 | p != this->segment_list_->end(); | |
61ba1cf9 | 189 | ++p) |
593f47df | 190 | v = (*p)->write_section_headers SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
16649710 | 191 | this->layout_, this->secnamepool_, v, &shndx |
ead1e424 | 192 | SELECT_SIZE_ENDIAN(size, big_endian)); |
a3ad94ed | 193 | for (Layout::Section_list::const_iterator p = |
16649710 ILT |
194 | this->unattached_section_list_->begin(); |
195 | p != this->unattached_section_list_->end(); | |
61ba1cf9 ILT |
196 | ++p) |
197 | { | |
a3ad94ed | 198 | gold_assert(shndx == (*p)->out_shndx()); |
61ba1cf9 | 199 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 200 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); |
61ba1cf9 | 201 | v += shdr_size; |
ead1e424 | 202 | ++shndx; |
61ba1cf9 ILT |
203 | } |
204 | ||
205 | of->write_output_view(this->offset(), all_shdrs_size, view); | |
a2fb1b05 ILT |
206 | } |
207 | ||
54dc6425 ILT |
208 | // Output_segment_header methods. |
209 | ||
61ba1cf9 | 210 | Output_segment_headers::Output_segment_headers( |
61ba1cf9 | 211 | const Layout::Segment_list& segment_list) |
9025d29d | 212 | : segment_list_(segment_list) |
61ba1cf9 | 213 | { |
9025d29d | 214 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
215 | int phdr_size; |
216 | if (size == 32) | |
217 | phdr_size = elfcpp::Elf_sizes<32>::phdr_size; | |
218 | else if (size == 64) | |
219 | phdr_size = elfcpp::Elf_sizes<64>::phdr_size; | |
220 | else | |
a3ad94ed | 221 | gold_unreachable(); |
61ba1cf9 ILT |
222 | |
223 | this->set_data_size(segment_list.size() * phdr_size); | |
224 | } | |
225 | ||
54dc6425 | 226 | void |
61ba1cf9 | 227 | Output_segment_headers::do_write(Output_file* of) |
75f65a3e | 228 | { |
9025d29d | 229 | if (parameters->get_size() == 32) |
61ba1cf9 | 230 | { |
9025d29d ILT |
231 | if (parameters->is_big_endian()) |
232 | { | |
233 | #ifdef HAVE_TARGET_32_BIG | |
234 | this->do_sized_write<32, true>(of); | |
235 | #else | |
236 | gold_unreachable(); | |
237 | #endif | |
238 | } | |
61ba1cf9 | 239 | else |
9025d29d ILT |
240 | { |
241 | #ifdef HAVE_TARGET_32_LITTLE | |
61ba1cf9 | 242 | this->do_sized_write<32, false>(of); |
9025d29d ILT |
243 | #else |
244 | gold_unreachable(); | |
245 | #endif | |
246 | } | |
61ba1cf9 | 247 | } |
9025d29d | 248 | else if (parameters->get_size() == 64) |
61ba1cf9 | 249 | { |
9025d29d ILT |
250 | if (parameters->is_big_endian()) |
251 | { | |
252 | #ifdef HAVE_TARGET_64_BIG | |
253 | this->do_sized_write<64, true>(of); | |
254 | #else | |
255 | gold_unreachable(); | |
256 | #endif | |
257 | } | |
61ba1cf9 | 258 | else |
9025d29d ILT |
259 | { |
260 | #ifdef HAVE_TARGET_64_LITTLE | |
261 | this->do_sized_write<64, false>(of); | |
262 | #else | |
263 | gold_unreachable(); | |
264 | #endif | |
265 | } | |
61ba1cf9 ILT |
266 | } |
267 | else | |
a3ad94ed | 268 | gold_unreachable(); |
61ba1cf9 ILT |
269 | } |
270 | ||
271 | template<int size, bool big_endian> | |
272 | void | |
273 | Output_segment_headers::do_sized_write(Output_file* of) | |
274 | { | |
275 | const int phdr_size = elfcpp::Elf_sizes<size>::phdr_size; | |
276 | off_t all_phdrs_size = this->segment_list_.size() * phdr_size; | |
277 | unsigned char* view = of->get_output_view(this->offset(), | |
278 | all_phdrs_size); | |
279 | unsigned char* v = view; | |
280 | for (Layout::Segment_list::const_iterator p = this->segment_list_.begin(); | |
281 | p != this->segment_list_.end(); | |
282 | ++p) | |
283 | { | |
284 | elfcpp::Phdr_write<size, big_endian> ophdr(v); | |
285 | (*p)->write_header(&ophdr); | |
286 | v += phdr_size; | |
287 | } | |
288 | ||
289 | of->write_output_view(this->offset(), all_phdrs_size, view); | |
75f65a3e ILT |
290 | } |
291 | ||
292 | // Output_file_header methods. | |
293 | ||
9025d29d | 294 | Output_file_header::Output_file_header(const Target* target, |
75f65a3e ILT |
295 | const Symbol_table* symtab, |
296 | const Output_segment_headers* osh) | |
9025d29d | 297 | : target_(target), |
75f65a3e | 298 | symtab_(symtab), |
61ba1cf9 | 299 | segment_header_(osh), |
75f65a3e ILT |
300 | section_header_(NULL), |
301 | shstrtab_(NULL) | |
302 | { | |
9025d29d | 303 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
304 | int ehdr_size; |
305 | if (size == 32) | |
306 | ehdr_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
307 | else if (size == 64) | |
308 | ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
309 | else | |
a3ad94ed | 310 | gold_unreachable(); |
61ba1cf9 ILT |
311 | |
312 | this->set_data_size(ehdr_size); | |
75f65a3e ILT |
313 | } |
314 | ||
315 | // Set the section table information for a file header. | |
316 | ||
317 | void | |
318 | Output_file_header::set_section_info(const Output_section_headers* shdrs, | |
319 | const Output_section* shstrtab) | |
320 | { | |
321 | this->section_header_ = shdrs; | |
322 | this->shstrtab_ = shstrtab; | |
323 | } | |
324 | ||
325 | // Write out the file header. | |
326 | ||
327 | void | |
61ba1cf9 | 328 | Output_file_header::do_write(Output_file* of) |
54dc6425 | 329 | { |
9025d29d | 330 | if (parameters->get_size() == 32) |
61ba1cf9 | 331 | { |
9025d29d ILT |
332 | if (parameters->is_big_endian()) |
333 | { | |
334 | #ifdef HAVE_TARGET_32_BIG | |
335 | this->do_sized_write<32, true>(of); | |
336 | #else | |
337 | gold_unreachable(); | |
338 | #endif | |
339 | } | |
61ba1cf9 | 340 | else |
9025d29d ILT |
341 | { |
342 | #ifdef HAVE_TARGET_32_LITTLE | |
343 | this->do_sized_write<32, false>(of); | |
344 | #else | |
345 | gold_unreachable(); | |
346 | #endif | |
347 | } | |
61ba1cf9 | 348 | } |
9025d29d | 349 | else if (parameters->get_size() == 64) |
61ba1cf9 | 350 | { |
9025d29d ILT |
351 | if (parameters->is_big_endian()) |
352 | { | |
353 | #ifdef HAVE_TARGET_64_BIG | |
354 | this->do_sized_write<64, true>(of); | |
355 | #else | |
356 | gold_unreachable(); | |
357 | #endif | |
358 | } | |
61ba1cf9 | 359 | else |
9025d29d ILT |
360 | { |
361 | #ifdef HAVE_TARGET_64_LITTLE | |
362 | this->do_sized_write<64, false>(of); | |
363 | #else | |
364 | gold_unreachable(); | |
365 | #endif | |
366 | } | |
61ba1cf9 ILT |
367 | } |
368 | else | |
a3ad94ed | 369 | gold_unreachable(); |
61ba1cf9 ILT |
370 | } |
371 | ||
372 | // Write out the file header with appropriate size and endianess. | |
373 | ||
374 | template<int size, bool big_endian> | |
375 | void | |
376 | Output_file_header::do_sized_write(Output_file* of) | |
377 | { | |
a3ad94ed | 378 | gold_assert(this->offset() == 0); |
61ba1cf9 ILT |
379 | |
380 | int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; | |
381 | unsigned char* view = of->get_output_view(0, ehdr_size); | |
382 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); | |
383 | ||
384 | unsigned char e_ident[elfcpp::EI_NIDENT]; | |
385 | memset(e_ident, 0, elfcpp::EI_NIDENT); | |
386 | e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0; | |
387 | e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1; | |
388 | e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2; | |
389 | e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3; | |
390 | if (size == 32) | |
391 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32; | |
392 | else if (size == 64) | |
393 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64; | |
394 | else | |
a3ad94ed | 395 | gold_unreachable(); |
61ba1cf9 ILT |
396 | e_ident[elfcpp::EI_DATA] = (big_endian |
397 | ? elfcpp::ELFDATA2MSB | |
398 | : elfcpp::ELFDATA2LSB); | |
399 | e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; | |
400 | // FIXME: Some targets may need to set EI_OSABI and EI_ABIVERSION. | |
401 | oehdr.put_e_ident(e_ident); | |
402 | ||
403 | elfcpp::ET e_type; | |
404 | // FIXME: ET_DYN. | |
7e1edb90 | 405 | if (parameters->output_is_object()) |
61ba1cf9 ILT |
406 | e_type = elfcpp::ET_REL; |
407 | else | |
408 | e_type = elfcpp::ET_EXEC; | |
409 | oehdr.put_e_type(e_type); | |
410 | ||
411 | oehdr.put_e_machine(this->target_->machine_code()); | |
412 | oehdr.put_e_version(elfcpp::EV_CURRENT); | |
413 | ||
ead1e424 | 414 | // FIXME: Need to support -e, and target specific entry symbol. |
61ba1cf9 ILT |
415 | Symbol* sym = this->symtab_->lookup("_start"); |
416 | typename Sized_symbol<size>::Value_type v; | |
417 | if (sym == NULL) | |
418 | v = 0; | |
419 | else | |
420 | { | |
421 | Sized_symbol<size>* ssym; | |
593f47df | 422 | ssym = this->symtab_->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d | 423 | sym SELECT_SIZE(size)); |
61ba1cf9 ILT |
424 | v = ssym->value(); |
425 | } | |
426 | oehdr.put_e_entry(v); | |
427 | ||
428 | oehdr.put_e_phoff(this->segment_header_->offset()); | |
429 | oehdr.put_e_shoff(this->section_header_->offset()); | |
430 | ||
431 | // FIXME: The target needs to set the flags. | |
432 | oehdr.put_e_flags(0); | |
433 | ||
434 | oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size); | |
435 | oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size); | |
436 | oehdr.put_e_phnum(this->segment_header_->data_size() | |
437 | / elfcpp::Elf_sizes<size>::phdr_size); | |
438 | oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size); | |
439 | oehdr.put_e_shnum(this->section_header_->data_size() | |
440 | / elfcpp::Elf_sizes<size>::shdr_size); | |
ead1e424 | 441 | oehdr.put_e_shstrndx(this->shstrtab_->out_shndx()); |
61ba1cf9 ILT |
442 | |
443 | of->write_output_view(0, ehdr_size, view); | |
54dc6425 ILT |
444 | } |
445 | ||
dbe717ef ILT |
446 | // Output_data_const methods. |
447 | ||
448 | void | |
a3ad94ed | 449 | Output_data_const::do_write(Output_file* of) |
dbe717ef | 450 | { |
a3ad94ed ILT |
451 | of->write(this->offset(), this->data_.data(), this->data_.size()); |
452 | } | |
453 | ||
454 | // Output_data_const_buffer methods. | |
455 | ||
456 | void | |
457 | Output_data_const_buffer::do_write(Output_file* of) | |
458 | { | |
459 | of->write(this->offset(), this->p_, this->data_size()); | |
dbe717ef ILT |
460 | } |
461 | ||
462 | // Output_section_data methods. | |
463 | ||
16649710 ILT |
464 | // Record the output section, and set the entry size and such. |
465 | ||
466 | void | |
467 | Output_section_data::set_output_section(Output_section* os) | |
468 | { | |
469 | gold_assert(this->output_section_ == NULL); | |
470 | this->output_section_ = os; | |
471 | this->do_adjust_output_section(os); | |
472 | } | |
473 | ||
474 | // Return the section index of the output section. | |
475 | ||
dbe717ef ILT |
476 | unsigned int |
477 | Output_section_data::do_out_shndx() const | |
478 | { | |
a3ad94ed | 479 | gold_assert(this->output_section_ != NULL); |
dbe717ef ILT |
480 | return this->output_section_->out_shndx(); |
481 | } | |
482 | ||
a3ad94ed ILT |
483 | // Output_data_strtab methods. |
484 | ||
485 | // Set the address. We don't actually care about the address, but we | |
486 | // do set our final size. | |
487 | ||
488 | void | |
489 | Output_data_strtab::do_set_address(uint64_t, off_t) | |
490 | { | |
491 | this->strtab_->set_string_offsets(); | |
492 | this->set_data_size(this->strtab_->get_strtab_size()); | |
493 | } | |
494 | ||
495 | // Write out a string table. | |
496 | ||
497 | void | |
498 | Output_data_strtab::do_write(Output_file* of) | |
499 | { | |
500 | this->strtab_->write(of, this->offset()); | |
501 | } | |
502 | ||
c06b7b0b ILT |
503 | // Output_reloc methods. |
504 | ||
505 | // Get the symbol index of a relocation. | |
506 | ||
507 | template<bool dynamic, int size, bool big_endian> | |
508 | unsigned int | |
509 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index() | |
510 | const | |
511 | { | |
512 | unsigned int index; | |
513 | switch (this->local_sym_index_) | |
514 | { | |
515 | case INVALID_CODE: | |
a3ad94ed | 516 | gold_unreachable(); |
c06b7b0b ILT |
517 | |
518 | case GSYM_CODE: | |
5a6f7e2d | 519 | if (this->u1_.gsym == NULL) |
c06b7b0b ILT |
520 | index = 0; |
521 | else if (dynamic) | |
5a6f7e2d | 522 | index = this->u1_.gsym->dynsym_index(); |
c06b7b0b | 523 | else |
5a6f7e2d | 524 | index = this->u1_.gsym->symtab_index(); |
c06b7b0b ILT |
525 | break; |
526 | ||
527 | case SECTION_CODE: | |
528 | if (dynamic) | |
5a6f7e2d | 529 | index = this->u1_.os->dynsym_index(); |
c06b7b0b | 530 | else |
5a6f7e2d | 531 | index = this->u1_.os->symtab_index(); |
c06b7b0b ILT |
532 | break; |
533 | ||
534 | default: | |
535 | if (dynamic) | |
536 | { | |
537 | // FIXME: It seems that some targets may need to generate | |
538 | // dynamic relocations against local symbols for some | |
539 | // reasons. This will have to be addressed at some point. | |
a3ad94ed | 540 | gold_unreachable(); |
c06b7b0b ILT |
541 | } |
542 | else | |
5a6f7e2d | 543 | index = this->u1_.relobj->symtab_index(this->local_sym_index_); |
c06b7b0b ILT |
544 | break; |
545 | } | |
a3ad94ed | 546 | gold_assert(index != -1U); |
c06b7b0b ILT |
547 | return index; |
548 | } | |
549 | ||
550 | // Write out the offset and info fields of a Rel or Rela relocation | |
551 | // entry. | |
552 | ||
553 | template<bool dynamic, int size, bool big_endian> | |
554 | template<typename Write_rel> | |
555 | void | |
556 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel( | |
557 | Write_rel* wr) const | |
558 | { | |
a3ad94ed | 559 | Address address = this->address_; |
5a6f7e2d ILT |
560 | if (this->shndx_ != INVALID_CODE) |
561 | { | |
562 | off_t off; | |
563 | Output_section* os = this->u2_.relobj->output_section(this->shndx_, | |
564 | &off); | |
565 | gold_assert(os != NULL); | |
566 | address += os->address() + off; | |
567 | } | |
568 | else if (this->u2_.od != NULL) | |
569 | address += this->u2_.od->address(); | |
a3ad94ed | 570 | wr->put_r_offset(address); |
c06b7b0b ILT |
571 | wr->put_r_info(elfcpp::elf_r_info<size>(this->get_symbol_index(), |
572 | this->type_)); | |
573 | } | |
574 | ||
575 | // Write out a Rel relocation. | |
576 | ||
577 | template<bool dynamic, int size, bool big_endian> | |
578 | void | |
579 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write( | |
580 | unsigned char* pov) const | |
581 | { | |
582 | elfcpp::Rel_write<size, big_endian> orel(pov); | |
583 | this->write_rel(&orel); | |
584 | } | |
585 | ||
586 | // Write out a Rela relocation. | |
587 | ||
588 | template<bool dynamic, int size, bool big_endian> | |
589 | void | |
590 | Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write( | |
591 | unsigned char* pov) const | |
592 | { | |
593 | elfcpp::Rela_write<size, big_endian> orel(pov); | |
594 | this->rel_.write_rel(&orel); | |
595 | orel.put_r_addend(this->addend_); | |
596 | } | |
597 | ||
598 | // Output_data_reloc_base methods. | |
599 | ||
16649710 ILT |
600 | // Adjust the output section. |
601 | ||
602 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
603 | void | |
604 | Output_data_reloc_base<sh_type, dynamic, size, big_endian> | |
605 | ::do_adjust_output_section(Output_section* os) | |
606 | { | |
607 | if (sh_type == elfcpp::SHT_REL) | |
608 | os->set_entsize(elfcpp::Elf_sizes<size>::rel_size); | |
609 | else if (sh_type == elfcpp::SHT_RELA) | |
610 | os->set_entsize(elfcpp::Elf_sizes<size>::rela_size); | |
611 | else | |
612 | gold_unreachable(); | |
613 | if (dynamic) | |
614 | os->set_should_link_to_dynsym(); | |
615 | else | |
616 | os->set_should_link_to_symtab(); | |
617 | } | |
618 | ||
c06b7b0b ILT |
619 | // Write out relocation data. |
620 | ||
621 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
622 | void | |
623 | Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write( | |
624 | Output_file* of) | |
625 | { | |
626 | const off_t off = this->offset(); | |
627 | const off_t oview_size = this->data_size(); | |
628 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
629 | ||
630 | unsigned char* pov = oview; | |
631 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
632 | p != this->relocs_.end(); | |
633 | ++p) | |
634 | { | |
635 | p->write(pov); | |
636 | pov += reloc_size; | |
637 | } | |
638 | ||
a3ad94ed | 639 | gold_assert(pov - oview == oview_size); |
c06b7b0b ILT |
640 | |
641 | of->write_output_view(off, oview_size, oview); | |
642 | ||
643 | // We no longer need the relocation entries. | |
644 | this->relocs_.clear(); | |
645 | } | |
646 | ||
dbe717ef | 647 | // Output_data_got::Got_entry methods. |
ead1e424 ILT |
648 | |
649 | // Write out the entry. | |
650 | ||
651 | template<int size, bool big_endian> | |
652 | void | |
7e1edb90 | 653 | Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const |
ead1e424 ILT |
654 | { |
655 | Valtype val = 0; | |
656 | ||
657 | switch (this->local_sym_index_) | |
658 | { | |
659 | case GSYM_CODE: | |
660 | { | |
661 | Symbol* gsym = this->u_.gsym; | |
662 | ||
663 | // If the symbol is resolved locally, we need to write out its | |
664 | // value. Otherwise we just write zero. The target code is | |
665 | // responsible for creating a relocation entry to fill in the | |
666 | // value at runtime. | |
7e1edb90 | 667 | if (gsym->final_value_is_known()) |
ead1e424 ILT |
668 | { |
669 | Sized_symbol<size>* sgsym; | |
670 | // This cast is a bit ugly. We don't want to put a | |
671 | // virtual method in Symbol, because we want Symbol to be | |
672 | // as small as possible. | |
673 | sgsym = static_cast<Sized_symbol<size>*>(gsym); | |
674 | val = sgsym->value(); | |
675 | } | |
676 | } | |
677 | break; | |
678 | ||
679 | case CONSTANT_CODE: | |
680 | val = this->u_.constant; | |
681 | break; | |
682 | ||
683 | default: | |
e727fa71 ILT |
684 | val = this->u_.object->local_symbol_value(this->local_sym_index_); |
685 | break; | |
ead1e424 ILT |
686 | } |
687 | ||
a3ad94ed | 688 | elfcpp::Swap<size, big_endian>::writeval(pov, val); |
ead1e424 ILT |
689 | } |
690 | ||
dbe717ef | 691 | // Output_data_got methods. |
ead1e424 | 692 | |
dbe717ef ILT |
693 | // Add an entry for a global symbol to the GOT. This returns true if |
694 | // this is a new GOT entry, false if the symbol already had a GOT | |
695 | // entry. | |
696 | ||
697 | template<int size, bool big_endian> | |
698 | bool | |
699 | Output_data_got<size, big_endian>::add_global(Symbol* gsym) | |
ead1e424 | 700 | { |
dbe717ef ILT |
701 | if (gsym->has_got_offset()) |
702 | return false; | |
ead1e424 | 703 | |
dbe717ef ILT |
704 | this->entries_.push_back(Got_entry(gsym)); |
705 | this->set_got_size(); | |
706 | gsym->set_got_offset(this->last_got_offset()); | |
707 | return true; | |
708 | } | |
ead1e424 | 709 | |
e727fa71 ILT |
710 | // Add an entry for a local symbol to the GOT. This returns true if |
711 | // this is a new GOT entry, false if the symbol already has a GOT | |
712 | // entry. | |
713 | ||
714 | template<int size, bool big_endian> | |
715 | bool | |
716 | Output_data_got<size, big_endian>::add_local( | |
717 | Sized_relobj<size, big_endian>* object, | |
718 | unsigned int symndx) | |
719 | { | |
720 | if (object->local_has_got_offset(symndx)) | |
721 | return false; | |
722 | this->entries_.push_back(Got_entry(object, symndx)); | |
723 | this->set_got_size(); | |
724 | object->set_local_got_offset(symndx, this->last_got_offset()); | |
725 | return true; | |
726 | } | |
727 | ||
ead1e424 ILT |
728 | // Write out the GOT. |
729 | ||
730 | template<int size, bool big_endian> | |
731 | void | |
dbe717ef | 732 | Output_data_got<size, big_endian>::do_write(Output_file* of) |
ead1e424 ILT |
733 | { |
734 | const int add = size / 8; | |
735 | ||
736 | const off_t off = this->offset(); | |
c06b7b0b | 737 | const off_t oview_size = this->data_size(); |
ead1e424 ILT |
738 | unsigned char* const oview = of->get_output_view(off, oview_size); |
739 | ||
740 | unsigned char* pov = oview; | |
741 | for (typename Got_entries::const_iterator p = this->entries_.begin(); | |
742 | p != this->entries_.end(); | |
743 | ++p) | |
744 | { | |
7e1edb90 | 745 | p->write(pov); |
ead1e424 ILT |
746 | pov += add; |
747 | } | |
748 | ||
a3ad94ed | 749 | gold_assert(pov - oview == oview_size); |
c06b7b0b | 750 | |
ead1e424 ILT |
751 | of->write_output_view(off, oview_size, oview); |
752 | ||
753 | // We no longer need the GOT entries. | |
754 | this->entries_.clear(); | |
755 | } | |
756 | ||
a3ad94ed ILT |
757 | // Output_data_dynamic::Dynamic_entry methods. |
758 | ||
759 | // Write out the entry. | |
760 | ||
761 | template<int size, bool big_endian> | |
762 | void | |
763 | Output_data_dynamic::Dynamic_entry::write( | |
764 | unsigned char* pov, | |
1ddbd1e6 ILT |
765 | const Stringpool* pool |
766 | ACCEPT_SIZE_ENDIAN) const | |
a3ad94ed ILT |
767 | { |
768 | typename elfcpp::Elf_types<size>::Elf_WXword val; | |
769 | switch (this->classification_) | |
770 | { | |
771 | case DYNAMIC_NUMBER: | |
772 | val = this->u_.val; | |
773 | break; | |
774 | ||
775 | case DYNAMIC_SECTION_ADDRESS: | |
16649710 | 776 | val = this->u_.od->address(); |
a3ad94ed ILT |
777 | break; |
778 | ||
779 | case DYNAMIC_SECTION_SIZE: | |
16649710 | 780 | val = this->u_.od->data_size(); |
a3ad94ed ILT |
781 | break; |
782 | ||
783 | case DYNAMIC_SYMBOL: | |
784 | { | |
16649710 ILT |
785 | const Sized_symbol<size>* s = |
786 | static_cast<const Sized_symbol<size>*>(this->u_.sym); | |
a3ad94ed ILT |
787 | val = s->value(); |
788 | } | |
789 | break; | |
790 | ||
791 | case DYNAMIC_STRING: | |
792 | val = pool->get_offset(this->u_.str); | |
793 | break; | |
794 | ||
795 | default: | |
796 | gold_unreachable(); | |
797 | } | |
798 | ||
799 | elfcpp::Dyn_write<size, big_endian> dw(pov); | |
800 | dw.put_d_tag(this->tag_); | |
801 | dw.put_d_val(val); | |
802 | } | |
803 | ||
804 | // Output_data_dynamic methods. | |
805 | ||
16649710 ILT |
806 | // Adjust the output section to set the entry size. |
807 | ||
808 | void | |
809 | Output_data_dynamic::do_adjust_output_section(Output_section* os) | |
810 | { | |
9025d29d | 811 | if (parameters->get_size() == 32) |
16649710 | 812 | os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size); |
9025d29d | 813 | else if (parameters->get_size() == 64) |
16649710 ILT |
814 | os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size); |
815 | else | |
816 | gold_unreachable(); | |
817 | } | |
818 | ||
a3ad94ed ILT |
819 | // Set the final data size. |
820 | ||
821 | void | |
822 | Output_data_dynamic::do_set_address(uint64_t, off_t) | |
823 | { | |
824 | // Add the terminating entry. | |
825 | this->add_constant(elfcpp::DT_NULL, 0); | |
826 | ||
827 | int dyn_size; | |
9025d29d | 828 | if (parameters->get_size() == 32) |
a3ad94ed | 829 | dyn_size = elfcpp::Elf_sizes<32>::dyn_size; |
9025d29d | 830 | else if (parameters->get_size() == 64) |
a3ad94ed ILT |
831 | dyn_size = elfcpp::Elf_sizes<64>::dyn_size; |
832 | else | |
833 | gold_unreachable(); | |
834 | this->set_data_size(this->entries_.size() * dyn_size); | |
835 | } | |
836 | ||
837 | // Write out the dynamic entries. | |
838 | ||
839 | void | |
840 | Output_data_dynamic::do_write(Output_file* of) | |
841 | { | |
9025d29d | 842 | if (parameters->get_size() == 32) |
a3ad94ed | 843 | { |
9025d29d ILT |
844 | if (parameters->is_big_endian()) |
845 | { | |
846 | #ifdef HAVE_TARGET_32_BIG | |
847 | this->sized_write<32, true>(of); | |
848 | #else | |
849 | gold_unreachable(); | |
850 | #endif | |
851 | } | |
a3ad94ed | 852 | else |
9025d29d ILT |
853 | { |
854 | #ifdef HAVE_TARGET_32_LITTLE | |
855 | this->sized_write<32, false>(of); | |
856 | #else | |
857 | gold_unreachable(); | |
858 | #endif | |
859 | } | |
a3ad94ed | 860 | } |
9025d29d | 861 | else if (parameters->get_size() == 64) |
a3ad94ed | 862 | { |
9025d29d ILT |
863 | if (parameters->is_big_endian()) |
864 | { | |
865 | #ifdef HAVE_TARGET_64_BIG | |
866 | this->sized_write<64, true>(of); | |
867 | #else | |
868 | gold_unreachable(); | |
869 | #endif | |
870 | } | |
a3ad94ed | 871 | else |
9025d29d ILT |
872 | { |
873 | #ifdef HAVE_TARGET_64_LITTLE | |
874 | this->sized_write<64, false>(of); | |
875 | #else | |
876 | gold_unreachable(); | |
877 | #endif | |
878 | } | |
a3ad94ed ILT |
879 | } |
880 | else | |
881 | gold_unreachable(); | |
882 | } | |
883 | ||
884 | template<int size, bool big_endian> | |
885 | void | |
886 | Output_data_dynamic::sized_write(Output_file* of) | |
887 | { | |
888 | const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
889 | ||
890 | const off_t offset = this->offset(); | |
891 | const off_t oview_size = this->data_size(); | |
892 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
893 | ||
894 | unsigned char* pov = oview; | |
895 | for (typename Dynamic_entries::const_iterator p = this->entries_.begin(); | |
896 | p != this->entries_.end(); | |
897 | ++p) | |
898 | { | |
1ddbd1e6 ILT |
899 | p->write SELECT_SIZE_ENDIAN_NAME(size, big_endian)( |
900 | pov, this->pool_ SELECT_SIZE_ENDIAN(size, big_endian)); | |
a3ad94ed ILT |
901 | pov += dyn_size; |
902 | } | |
903 | ||
904 | gold_assert(pov - oview == oview_size); | |
905 | ||
906 | of->write_output_view(offset, oview_size, oview); | |
907 | ||
908 | // We no longer need the dynamic entries. | |
909 | this->entries_.clear(); | |
910 | } | |
911 | ||
ead1e424 ILT |
912 | // Output_section::Input_section methods. |
913 | ||
914 | // Return the data size. For an input section we store the size here. | |
915 | // For an Output_section_data, we have to ask it for the size. | |
916 | ||
917 | off_t | |
918 | Output_section::Input_section::data_size() const | |
919 | { | |
920 | if (this->is_input_section()) | |
b8e6aad9 | 921 | return this->u1_.data_size; |
ead1e424 | 922 | else |
b8e6aad9 | 923 | return this->u2_.posd->data_size(); |
ead1e424 ILT |
924 | } |
925 | ||
926 | // Set the address and file offset. | |
927 | ||
928 | void | |
929 | Output_section::Input_section::set_address(uint64_t addr, off_t off, | |
930 | off_t secoff) | |
931 | { | |
932 | if (this->is_input_section()) | |
b8e6aad9 | 933 | this->u2_.object->set_section_offset(this->shndx_, off - secoff); |
ead1e424 | 934 | else |
b8e6aad9 ILT |
935 | this->u2_.posd->set_address(addr, off); |
936 | } | |
937 | ||
938 | // Try to turn an input address into an output address. | |
939 | ||
940 | bool | |
941 | Output_section::Input_section::output_address(const Relobj* object, | |
942 | unsigned int shndx, | |
943 | off_t offset, | |
944 | uint64_t output_section_address, | |
945 | uint64_t *poutput) const | |
946 | { | |
947 | if (!this->is_input_section()) | |
948 | return this->u2_.posd->output_address(object, shndx, offset, | |
949 | output_section_address, poutput); | |
950 | else | |
951 | { | |
9d7094e8 ILT |
952 | if (this->shndx_ != shndx |
953 | || this->u2_.object != object) | |
b8e6aad9 ILT |
954 | return false; |
955 | off_t output_offset; | |
956 | Output_section* os = object->output_section(shndx, &output_offset); | |
957 | gold_assert(os != NULL); | |
958 | *poutput = output_section_address + output_offset + offset; | |
959 | return true; | |
960 | } | |
ead1e424 ILT |
961 | } |
962 | ||
963 | // Write out the data. We don't have to do anything for an input | |
964 | // section--they are handled via Object::relocate--but this is where | |
965 | // we write out the data for an Output_section_data. | |
966 | ||
967 | void | |
968 | Output_section::Input_section::write(Output_file* of) | |
969 | { | |
970 | if (!this->is_input_section()) | |
b8e6aad9 | 971 | this->u2_.posd->write(of); |
ead1e424 ILT |
972 | } |
973 | ||
a2fb1b05 ILT |
974 | // Output_section methods. |
975 | ||
976 | // Construct an Output_section. NAME will point into a Stringpool. | |
977 | ||
978 | Output_section::Output_section(const char* name, elfcpp::Elf_Word type, | |
b8e6aad9 | 979 | elfcpp::Elf_Xword flags) |
a2fb1b05 | 980 | : name_(name), |
a2fb1b05 ILT |
981 | addralign_(0), |
982 | entsize_(0), | |
16649710 | 983 | link_section_(NULL), |
a2fb1b05 | 984 | link_(0), |
16649710 | 985 | info_section_(NULL), |
a2fb1b05 ILT |
986 | info_(0), |
987 | type_(type), | |
61ba1cf9 | 988 | flags_(flags), |
ead1e424 | 989 | out_shndx_(0), |
c06b7b0b ILT |
990 | symtab_index_(0), |
991 | dynsym_index_(0), | |
ead1e424 ILT |
992 | input_sections_(), |
993 | first_input_offset_(0), | |
c51e6221 | 994 | fills_(), |
a3ad94ed | 995 | needs_symtab_index_(false), |
16649710 ILT |
996 | needs_dynsym_index_(false), |
997 | should_link_to_symtab_(false), | |
998 | should_link_to_dynsym_(false) | |
a2fb1b05 ILT |
999 | { |
1000 | } | |
1001 | ||
54dc6425 ILT |
1002 | Output_section::~Output_section() |
1003 | { | |
1004 | } | |
1005 | ||
16649710 ILT |
1006 | // Set the entry size. |
1007 | ||
1008 | void | |
1009 | Output_section::set_entsize(uint64_t v) | |
1010 | { | |
1011 | if (this->entsize_ == 0) | |
1012 | this->entsize_ = v; | |
1013 | else | |
1014 | gold_assert(this->entsize_ == v); | |
1015 | } | |
1016 | ||
ead1e424 ILT |
1017 | // Add the input section SHNDX, with header SHDR, named SECNAME, in |
1018 | // OBJECT, to the Output_section. Return the offset of the input | |
1019 | // section within the output section. We don't always keep track of | |
a2fb1b05 ILT |
1020 | // input sections for an Output_section. Instead, each Object keeps |
1021 | // track of the Output_section for each of its input sections. | |
1022 | ||
1023 | template<int size, bool big_endian> | |
1024 | off_t | |
f6ce93d6 | 1025 | Output_section::add_input_section(Relobj* object, unsigned int shndx, |
ead1e424 | 1026 | const char* secname, |
a2fb1b05 ILT |
1027 | const elfcpp::Shdr<size, big_endian>& shdr) |
1028 | { | |
1029 | elfcpp::Elf_Xword addralign = shdr.get_sh_addralign(); | |
1030 | if ((addralign & (addralign - 1)) != 0) | |
1031 | { | |
75f2446e ILT |
1032 | object->error(_("invalid alignment %lu for section \"%s\""), |
1033 | static_cast<unsigned long>(addralign), secname); | |
1034 | addralign = 1; | |
a2fb1b05 | 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 | ||
4e9d8586 | 1689 | struct stat s; |
5ffcaa86 ILT |
1690 | if (::stat(this->name_, &s) == 0 && s.st_size != 0) |
1691 | unlink_if_ordinary(this->name_); | |
4e9d8586 | 1692 | |
7e1edb90 | 1693 | int mode = parameters->output_is_object() ? 0666 : 0777; |
61ba1cf9 ILT |
1694 | int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode); |
1695 | if (o < 0) | |
75f2446e | 1696 | gold_fatal(_("%s: open: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1697 | this->o_ = o; |
1698 | ||
1699 | // Write out one byte to make the file the right size. | |
1700 | if (::lseek(o, file_size - 1, SEEK_SET) < 0) | |
75f2446e | 1701 | gold_fatal(_("%s: lseek: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1702 | char b = 0; |
1703 | if (::write(o, &b, 1) != 1) | |
75f2446e | 1704 | gold_fatal(_("%s: write: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1705 | |
1706 | // Map the file into memory. | |
1707 | void* base = ::mmap(NULL, file_size, PROT_READ | PROT_WRITE, | |
1708 | MAP_SHARED, o, 0); | |
1709 | if (base == MAP_FAILED) | |
75f2446e | 1710 | gold_fatal(_("%s: mmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1711 | this->base_ = static_cast<unsigned char*>(base); |
1712 | } | |
1713 | ||
1714 | // Close the output file. | |
1715 | ||
1716 | void | |
1717 | Output_file::close() | |
1718 | { | |
1719 | if (::munmap(this->base_, this->file_size_) < 0) | |
a0c4fb0a | 1720 | gold_error(_("%s: munmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1721 | this->base_ = NULL; |
1722 | ||
1723 | if (::close(this->o_) < 0) | |
75f2446e | 1724 | gold_error(_("%s: close: %s"), this->name_, strerror(errno)); |
61ba1cf9 | 1725 | this->o_ = -1; |
a2fb1b05 ILT |
1726 | } |
1727 | ||
1728 | // Instantiate the templates we need. We could use the configure | |
1729 | // script to restrict this to only the ones for implemented targets. | |
1730 | ||
193a53d9 | 1731 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
1732 | template |
1733 | off_t | |
1734 | Output_section::add_input_section<32, false>( | |
f6ce93d6 | 1735 | Relobj* object, |
ead1e424 | 1736 | unsigned int shndx, |
a2fb1b05 ILT |
1737 | const char* secname, |
1738 | const elfcpp::Shdr<32, false>& shdr); | |
193a53d9 | 1739 | #endif |
a2fb1b05 | 1740 | |
193a53d9 | 1741 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
1742 | template |
1743 | off_t | |
1744 | Output_section::add_input_section<32, true>( | |
f6ce93d6 | 1745 | Relobj* object, |
ead1e424 | 1746 | unsigned int shndx, |
a2fb1b05 ILT |
1747 | const char* secname, |
1748 | const elfcpp::Shdr<32, true>& shdr); | |
193a53d9 | 1749 | #endif |
a2fb1b05 | 1750 | |
193a53d9 | 1751 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
1752 | template |
1753 | off_t | |
1754 | Output_section::add_input_section<64, false>( | |
f6ce93d6 | 1755 | Relobj* object, |
ead1e424 | 1756 | unsigned int shndx, |
a2fb1b05 ILT |
1757 | const char* secname, |
1758 | const elfcpp::Shdr<64, false>& shdr); | |
193a53d9 | 1759 | #endif |
a2fb1b05 | 1760 | |
193a53d9 | 1761 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
1762 | template |
1763 | off_t | |
1764 | Output_section::add_input_section<64, true>( | |
f6ce93d6 | 1765 | Relobj* object, |
ead1e424 | 1766 | unsigned int shndx, |
a2fb1b05 ILT |
1767 | const char* secname, |
1768 | const elfcpp::Shdr<64, true>& shdr); | |
193a53d9 | 1769 | #endif |
a2fb1b05 | 1770 | |
193a53d9 | 1771 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1772 | template |
1773 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, false>; | |
193a53d9 | 1774 | #endif |
c06b7b0b | 1775 | |
193a53d9 | 1776 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1777 | template |
1778 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, true>; | |
193a53d9 | 1779 | #endif |
c06b7b0b | 1780 | |
193a53d9 | 1781 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1782 | template |
1783 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, false>; | |
193a53d9 | 1784 | #endif |
c06b7b0b | 1785 | |
193a53d9 | 1786 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1787 | template |
1788 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, true>; | |
193a53d9 | 1789 | #endif |
c06b7b0b | 1790 | |
193a53d9 | 1791 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1792 | template |
1793 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, false>; | |
193a53d9 | 1794 | #endif |
c06b7b0b | 1795 | |
193a53d9 | 1796 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1797 | template |
1798 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, true>; | |
193a53d9 | 1799 | #endif |
c06b7b0b | 1800 | |
193a53d9 | 1801 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1802 | template |
1803 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, false>; | |
193a53d9 | 1804 | #endif |
c06b7b0b | 1805 | |
193a53d9 | 1806 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1807 | template |
1808 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, true>; | |
193a53d9 | 1809 | #endif |
c06b7b0b | 1810 | |
193a53d9 | 1811 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1812 | template |
1813 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, false>; | |
193a53d9 | 1814 | #endif |
c06b7b0b | 1815 | |
193a53d9 | 1816 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1817 | template |
1818 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, true>; | |
193a53d9 | 1819 | #endif |
c06b7b0b | 1820 | |
193a53d9 | 1821 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1822 | template |
1823 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, false>; | |
193a53d9 | 1824 | #endif |
c06b7b0b | 1825 | |
193a53d9 | 1826 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1827 | template |
1828 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, true>; | |
193a53d9 | 1829 | #endif |
c06b7b0b | 1830 | |
193a53d9 | 1831 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1832 | template |
1833 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
193a53d9 | 1834 | #endif |
c06b7b0b | 1835 | |
193a53d9 | 1836 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1837 | template |
1838 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
193a53d9 | 1839 | #endif |
c06b7b0b | 1840 | |
193a53d9 | 1841 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1842 | template |
1843 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
193a53d9 | 1844 | #endif |
c06b7b0b | 1845 | |
193a53d9 | 1846 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1847 | template |
1848 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
193a53d9 | 1849 | #endif |
c06b7b0b | 1850 | |
193a53d9 | 1851 | #ifdef HAVE_TARGET_32_LITTLE |
ead1e424 | 1852 | template |
dbe717ef | 1853 | class Output_data_got<32, false>; |
193a53d9 | 1854 | #endif |
ead1e424 | 1855 | |
193a53d9 | 1856 | #ifdef HAVE_TARGET_32_BIG |
ead1e424 | 1857 | template |
dbe717ef | 1858 | class Output_data_got<32, true>; |
193a53d9 | 1859 | #endif |
ead1e424 | 1860 | |
193a53d9 | 1861 | #ifdef HAVE_TARGET_64_LITTLE |
ead1e424 | 1862 | template |
dbe717ef | 1863 | class Output_data_got<64, false>; |
193a53d9 | 1864 | #endif |
ead1e424 | 1865 | |
193a53d9 | 1866 | #ifdef HAVE_TARGET_64_BIG |
ead1e424 | 1867 | template |
dbe717ef | 1868 | class Output_data_got<64, true>; |
193a53d9 | 1869 | #endif |
ead1e424 | 1870 | |
a2fb1b05 | 1871 | } // End namespace gold. |