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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; | |
7e1edb90 | 404 | if (parameters->output_is_object()) |
61ba1cf9 | 405 | e_type = elfcpp::ET_REL; |
436ca963 ILT |
406 | else if (parameters->output_is_shared()) |
407 | e_type = elfcpp::ET_DYN; | |
61ba1cf9 ILT |
408 | else |
409 | e_type = elfcpp::ET_EXEC; | |
410 | oehdr.put_e_type(e_type); | |
411 | ||
412 | oehdr.put_e_machine(this->target_->machine_code()); | |
413 | oehdr.put_e_version(elfcpp::EV_CURRENT); | |
414 | ||
ead1e424 | 415 | // FIXME: Need to support -e, and target specific entry symbol. |
61ba1cf9 ILT |
416 | Symbol* sym = this->symtab_->lookup("_start"); |
417 | typename Sized_symbol<size>::Value_type v; | |
418 | if (sym == NULL) | |
419 | v = 0; | |
420 | else | |
421 | { | |
422 | Sized_symbol<size>* ssym; | |
593f47df | 423 | ssym = this->symtab_->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d | 424 | sym SELECT_SIZE(size)); |
61ba1cf9 ILT |
425 | v = ssym->value(); |
426 | } | |
427 | oehdr.put_e_entry(v); | |
428 | ||
429 | oehdr.put_e_phoff(this->segment_header_->offset()); | |
430 | oehdr.put_e_shoff(this->section_header_->offset()); | |
431 | ||
432 | // FIXME: The target needs to set the flags. | |
433 | oehdr.put_e_flags(0); | |
434 | ||
435 | oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size); | |
436 | oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size); | |
437 | oehdr.put_e_phnum(this->segment_header_->data_size() | |
438 | / elfcpp::Elf_sizes<size>::phdr_size); | |
439 | oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size); | |
440 | oehdr.put_e_shnum(this->section_header_->data_size() | |
441 | / elfcpp::Elf_sizes<size>::shdr_size); | |
ead1e424 | 442 | oehdr.put_e_shstrndx(this->shstrtab_->out_shndx()); |
61ba1cf9 ILT |
443 | |
444 | of->write_output_view(0, ehdr_size, view); | |
54dc6425 ILT |
445 | } |
446 | ||
dbe717ef ILT |
447 | // Output_data_const methods. |
448 | ||
449 | void | |
a3ad94ed | 450 | Output_data_const::do_write(Output_file* of) |
dbe717ef | 451 | { |
a3ad94ed ILT |
452 | of->write(this->offset(), this->data_.data(), this->data_.size()); |
453 | } | |
454 | ||
455 | // Output_data_const_buffer methods. | |
456 | ||
457 | void | |
458 | Output_data_const_buffer::do_write(Output_file* of) | |
459 | { | |
460 | of->write(this->offset(), this->p_, this->data_size()); | |
dbe717ef ILT |
461 | } |
462 | ||
463 | // Output_section_data methods. | |
464 | ||
16649710 ILT |
465 | // Record the output section, and set the entry size and such. |
466 | ||
467 | void | |
468 | Output_section_data::set_output_section(Output_section* os) | |
469 | { | |
470 | gold_assert(this->output_section_ == NULL); | |
471 | this->output_section_ = os; | |
472 | this->do_adjust_output_section(os); | |
473 | } | |
474 | ||
475 | // Return the section index of the output section. | |
476 | ||
dbe717ef ILT |
477 | unsigned int |
478 | Output_section_data::do_out_shndx() const | |
479 | { | |
a3ad94ed | 480 | gold_assert(this->output_section_ != NULL); |
dbe717ef ILT |
481 | return this->output_section_->out_shndx(); |
482 | } | |
483 | ||
a3ad94ed ILT |
484 | // Output_data_strtab methods. |
485 | ||
486 | // Set the address. We don't actually care about the address, but we | |
487 | // do set our final size. | |
488 | ||
489 | void | |
490 | Output_data_strtab::do_set_address(uint64_t, off_t) | |
491 | { | |
492 | this->strtab_->set_string_offsets(); | |
493 | this->set_data_size(this->strtab_->get_strtab_size()); | |
494 | } | |
495 | ||
496 | // Write out a string table. | |
497 | ||
498 | void | |
499 | Output_data_strtab::do_write(Output_file* of) | |
500 | { | |
501 | this->strtab_->write(of, this->offset()); | |
502 | } | |
503 | ||
c06b7b0b ILT |
504 | // Output_reloc methods. |
505 | ||
506 | // Get the symbol index of a relocation. | |
507 | ||
508 | template<bool dynamic, int size, bool big_endian> | |
509 | unsigned int | |
510 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index() | |
511 | const | |
512 | { | |
513 | unsigned int index; | |
514 | switch (this->local_sym_index_) | |
515 | { | |
516 | case INVALID_CODE: | |
a3ad94ed | 517 | gold_unreachable(); |
c06b7b0b ILT |
518 | |
519 | case GSYM_CODE: | |
5a6f7e2d | 520 | if (this->u1_.gsym == NULL) |
c06b7b0b ILT |
521 | index = 0; |
522 | else if (dynamic) | |
5a6f7e2d | 523 | index = this->u1_.gsym->dynsym_index(); |
c06b7b0b | 524 | else |
5a6f7e2d | 525 | index = this->u1_.gsym->symtab_index(); |
c06b7b0b ILT |
526 | break; |
527 | ||
528 | case SECTION_CODE: | |
529 | if (dynamic) | |
5a6f7e2d | 530 | index = this->u1_.os->dynsym_index(); |
c06b7b0b | 531 | else |
5a6f7e2d | 532 | index = this->u1_.os->symtab_index(); |
c06b7b0b ILT |
533 | break; |
534 | ||
436ca963 ILT |
535 | case 0: |
536 | // Relocations without symbols use a symbol index of 0. | |
537 | index = 0; | |
538 | break; | |
539 | ||
c06b7b0b ILT |
540 | default: |
541 | if (dynamic) | |
542 | { | |
543 | // FIXME: It seems that some targets may need to generate | |
544 | // dynamic relocations against local symbols for some | |
545 | // reasons. This will have to be addressed at some point. | |
a3ad94ed | 546 | gold_unreachable(); |
c06b7b0b ILT |
547 | } |
548 | else | |
5a6f7e2d | 549 | index = this->u1_.relobj->symtab_index(this->local_sym_index_); |
c06b7b0b ILT |
550 | break; |
551 | } | |
a3ad94ed | 552 | gold_assert(index != -1U); |
c06b7b0b ILT |
553 | return index; |
554 | } | |
555 | ||
556 | // Write out the offset and info fields of a Rel or Rela relocation | |
557 | // entry. | |
558 | ||
559 | template<bool dynamic, int size, bool big_endian> | |
560 | template<typename Write_rel> | |
561 | void | |
562 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel( | |
563 | Write_rel* wr) const | |
564 | { | |
a3ad94ed | 565 | Address address = this->address_; |
5a6f7e2d ILT |
566 | if (this->shndx_ != INVALID_CODE) |
567 | { | |
568 | off_t off; | |
569 | Output_section* os = this->u2_.relobj->output_section(this->shndx_, | |
570 | &off); | |
571 | gold_assert(os != NULL); | |
572 | address += os->address() + off; | |
573 | } | |
574 | else if (this->u2_.od != NULL) | |
575 | address += this->u2_.od->address(); | |
a3ad94ed | 576 | wr->put_r_offset(address); |
c06b7b0b ILT |
577 | wr->put_r_info(elfcpp::elf_r_info<size>(this->get_symbol_index(), |
578 | this->type_)); | |
579 | } | |
580 | ||
581 | // Write out a Rel relocation. | |
582 | ||
583 | template<bool dynamic, int size, bool big_endian> | |
584 | void | |
585 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write( | |
586 | unsigned char* pov) const | |
587 | { | |
588 | elfcpp::Rel_write<size, big_endian> orel(pov); | |
589 | this->write_rel(&orel); | |
590 | } | |
591 | ||
592 | // Write out a Rela relocation. | |
593 | ||
594 | template<bool dynamic, int size, bool big_endian> | |
595 | void | |
596 | Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write( | |
597 | unsigned char* pov) const | |
598 | { | |
599 | elfcpp::Rela_write<size, big_endian> orel(pov); | |
600 | this->rel_.write_rel(&orel); | |
601 | orel.put_r_addend(this->addend_); | |
602 | } | |
603 | ||
604 | // Output_data_reloc_base methods. | |
605 | ||
16649710 ILT |
606 | // Adjust the output section. |
607 | ||
608 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
609 | void | |
610 | Output_data_reloc_base<sh_type, dynamic, size, big_endian> | |
611 | ::do_adjust_output_section(Output_section* os) | |
612 | { | |
613 | if (sh_type == elfcpp::SHT_REL) | |
614 | os->set_entsize(elfcpp::Elf_sizes<size>::rel_size); | |
615 | else if (sh_type == elfcpp::SHT_RELA) | |
616 | os->set_entsize(elfcpp::Elf_sizes<size>::rela_size); | |
617 | else | |
618 | gold_unreachable(); | |
619 | if (dynamic) | |
620 | os->set_should_link_to_dynsym(); | |
621 | else | |
622 | os->set_should_link_to_symtab(); | |
623 | } | |
624 | ||
c06b7b0b ILT |
625 | // Write out relocation data. |
626 | ||
627 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
628 | void | |
629 | Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write( | |
630 | Output_file* of) | |
631 | { | |
632 | const off_t off = this->offset(); | |
633 | const off_t oview_size = this->data_size(); | |
634 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
635 | ||
636 | unsigned char* pov = oview; | |
637 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
638 | p != this->relocs_.end(); | |
639 | ++p) | |
640 | { | |
641 | p->write(pov); | |
642 | pov += reloc_size; | |
643 | } | |
644 | ||
a3ad94ed | 645 | gold_assert(pov - oview == oview_size); |
c06b7b0b ILT |
646 | |
647 | of->write_output_view(off, oview_size, oview); | |
648 | ||
649 | // We no longer need the relocation entries. | |
650 | this->relocs_.clear(); | |
651 | } | |
652 | ||
dbe717ef | 653 | // Output_data_got::Got_entry methods. |
ead1e424 ILT |
654 | |
655 | // Write out the entry. | |
656 | ||
657 | template<int size, bool big_endian> | |
658 | void | |
7e1edb90 | 659 | Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const |
ead1e424 ILT |
660 | { |
661 | Valtype val = 0; | |
662 | ||
663 | switch (this->local_sym_index_) | |
664 | { | |
665 | case GSYM_CODE: | |
666 | { | |
667 | Symbol* gsym = this->u_.gsym; | |
668 | ||
669 | // If the symbol is resolved locally, we need to write out its | |
670 | // value. Otherwise we just write zero. The target code is | |
671 | // responsible for creating a relocation entry to fill in the | |
672 | // value at runtime. | |
7e1edb90 | 673 | if (gsym->final_value_is_known()) |
ead1e424 ILT |
674 | { |
675 | Sized_symbol<size>* sgsym; | |
676 | // This cast is a bit ugly. We don't want to put a | |
677 | // virtual method in Symbol, because we want Symbol to be | |
678 | // as small as possible. | |
679 | sgsym = static_cast<Sized_symbol<size>*>(gsym); | |
680 | val = sgsym->value(); | |
681 | } | |
682 | } | |
683 | break; | |
684 | ||
685 | case CONSTANT_CODE: | |
686 | val = this->u_.constant; | |
687 | break; | |
688 | ||
689 | default: | |
e727fa71 ILT |
690 | val = this->u_.object->local_symbol_value(this->local_sym_index_); |
691 | break; | |
ead1e424 ILT |
692 | } |
693 | ||
a3ad94ed | 694 | elfcpp::Swap<size, big_endian>::writeval(pov, val); |
ead1e424 ILT |
695 | } |
696 | ||
dbe717ef | 697 | // Output_data_got methods. |
ead1e424 | 698 | |
dbe717ef ILT |
699 | // Add an entry for a global symbol to the GOT. This returns true if |
700 | // this is a new GOT entry, false if the symbol already had a GOT | |
701 | // entry. | |
702 | ||
703 | template<int size, bool big_endian> | |
704 | bool | |
705 | Output_data_got<size, big_endian>::add_global(Symbol* gsym) | |
ead1e424 | 706 | { |
dbe717ef ILT |
707 | if (gsym->has_got_offset()) |
708 | return false; | |
ead1e424 | 709 | |
dbe717ef ILT |
710 | this->entries_.push_back(Got_entry(gsym)); |
711 | this->set_got_size(); | |
712 | gsym->set_got_offset(this->last_got_offset()); | |
713 | return true; | |
714 | } | |
ead1e424 | 715 | |
e727fa71 ILT |
716 | // Add an entry for a local symbol to the GOT. This returns true if |
717 | // this is a new GOT entry, false if the symbol already has a GOT | |
718 | // entry. | |
719 | ||
720 | template<int size, bool big_endian> | |
721 | bool | |
722 | Output_data_got<size, big_endian>::add_local( | |
723 | Sized_relobj<size, big_endian>* object, | |
724 | unsigned int symndx) | |
725 | { | |
726 | if (object->local_has_got_offset(symndx)) | |
727 | return false; | |
728 | this->entries_.push_back(Got_entry(object, symndx)); | |
729 | this->set_got_size(); | |
730 | object->set_local_got_offset(symndx, this->last_got_offset()); | |
731 | return true; | |
732 | } | |
733 | ||
ead1e424 ILT |
734 | // Write out the GOT. |
735 | ||
736 | template<int size, bool big_endian> | |
737 | void | |
dbe717ef | 738 | Output_data_got<size, big_endian>::do_write(Output_file* of) |
ead1e424 ILT |
739 | { |
740 | const int add = size / 8; | |
741 | ||
742 | const off_t off = this->offset(); | |
c06b7b0b | 743 | const off_t oview_size = this->data_size(); |
ead1e424 ILT |
744 | unsigned char* const oview = of->get_output_view(off, oview_size); |
745 | ||
746 | unsigned char* pov = oview; | |
747 | for (typename Got_entries::const_iterator p = this->entries_.begin(); | |
748 | p != this->entries_.end(); | |
749 | ++p) | |
750 | { | |
7e1edb90 | 751 | p->write(pov); |
ead1e424 ILT |
752 | pov += add; |
753 | } | |
754 | ||
a3ad94ed | 755 | gold_assert(pov - oview == oview_size); |
c06b7b0b | 756 | |
ead1e424 ILT |
757 | of->write_output_view(off, oview_size, oview); |
758 | ||
759 | // We no longer need the GOT entries. | |
760 | this->entries_.clear(); | |
761 | } | |
762 | ||
a3ad94ed ILT |
763 | // Output_data_dynamic::Dynamic_entry methods. |
764 | ||
765 | // Write out the entry. | |
766 | ||
767 | template<int size, bool big_endian> | |
768 | void | |
769 | Output_data_dynamic::Dynamic_entry::write( | |
770 | unsigned char* pov, | |
1ddbd1e6 ILT |
771 | const Stringpool* pool |
772 | ACCEPT_SIZE_ENDIAN) const | |
a3ad94ed ILT |
773 | { |
774 | typename elfcpp::Elf_types<size>::Elf_WXword val; | |
775 | switch (this->classification_) | |
776 | { | |
777 | case DYNAMIC_NUMBER: | |
778 | val = this->u_.val; | |
779 | break; | |
780 | ||
781 | case DYNAMIC_SECTION_ADDRESS: | |
16649710 | 782 | val = this->u_.od->address(); |
a3ad94ed ILT |
783 | break; |
784 | ||
785 | case DYNAMIC_SECTION_SIZE: | |
16649710 | 786 | val = this->u_.od->data_size(); |
a3ad94ed ILT |
787 | break; |
788 | ||
789 | case DYNAMIC_SYMBOL: | |
790 | { | |
16649710 ILT |
791 | const Sized_symbol<size>* s = |
792 | static_cast<const Sized_symbol<size>*>(this->u_.sym); | |
a3ad94ed ILT |
793 | val = s->value(); |
794 | } | |
795 | break; | |
796 | ||
797 | case DYNAMIC_STRING: | |
798 | val = pool->get_offset(this->u_.str); | |
799 | break; | |
800 | ||
801 | default: | |
802 | gold_unreachable(); | |
803 | } | |
804 | ||
805 | elfcpp::Dyn_write<size, big_endian> dw(pov); | |
806 | dw.put_d_tag(this->tag_); | |
807 | dw.put_d_val(val); | |
808 | } | |
809 | ||
810 | // Output_data_dynamic methods. | |
811 | ||
16649710 ILT |
812 | // Adjust the output section to set the entry size. |
813 | ||
814 | void | |
815 | Output_data_dynamic::do_adjust_output_section(Output_section* os) | |
816 | { | |
9025d29d | 817 | if (parameters->get_size() == 32) |
16649710 | 818 | os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size); |
9025d29d | 819 | else if (parameters->get_size() == 64) |
16649710 ILT |
820 | os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size); |
821 | else | |
822 | gold_unreachable(); | |
823 | } | |
824 | ||
a3ad94ed ILT |
825 | // Set the final data size. |
826 | ||
827 | void | |
828 | Output_data_dynamic::do_set_address(uint64_t, off_t) | |
829 | { | |
830 | // Add the terminating entry. | |
831 | this->add_constant(elfcpp::DT_NULL, 0); | |
832 | ||
833 | int dyn_size; | |
9025d29d | 834 | if (parameters->get_size() == 32) |
a3ad94ed | 835 | dyn_size = elfcpp::Elf_sizes<32>::dyn_size; |
9025d29d | 836 | else if (parameters->get_size() == 64) |
a3ad94ed ILT |
837 | dyn_size = elfcpp::Elf_sizes<64>::dyn_size; |
838 | else | |
839 | gold_unreachable(); | |
840 | this->set_data_size(this->entries_.size() * dyn_size); | |
841 | } | |
842 | ||
843 | // Write out the dynamic entries. | |
844 | ||
845 | void | |
846 | Output_data_dynamic::do_write(Output_file* of) | |
847 | { | |
9025d29d | 848 | if (parameters->get_size() == 32) |
a3ad94ed | 849 | { |
9025d29d ILT |
850 | if (parameters->is_big_endian()) |
851 | { | |
852 | #ifdef HAVE_TARGET_32_BIG | |
853 | this->sized_write<32, true>(of); | |
854 | #else | |
855 | gold_unreachable(); | |
856 | #endif | |
857 | } | |
a3ad94ed | 858 | else |
9025d29d ILT |
859 | { |
860 | #ifdef HAVE_TARGET_32_LITTLE | |
861 | this->sized_write<32, false>(of); | |
862 | #else | |
863 | gold_unreachable(); | |
864 | #endif | |
865 | } | |
a3ad94ed | 866 | } |
9025d29d | 867 | else if (parameters->get_size() == 64) |
a3ad94ed | 868 | { |
9025d29d ILT |
869 | if (parameters->is_big_endian()) |
870 | { | |
871 | #ifdef HAVE_TARGET_64_BIG | |
872 | this->sized_write<64, true>(of); | |
873 | #else | |
874 | gold_unreachable(); | |
875 | #endif | |
876 | } | |
a3ad94ed | 877 | else |
9025d29d ILT |
878 | { |
879 | #ifdef HAVE_TARGET_64_LITTLE | |
880 | this->sized_write<64, false>(of); | |
881 | #else | |
882 | gold_unreachable(); | |
883 | #endif | |
884 | } | |
a3ad94ed ILT |
885 | } |
886 | else | |
887 | gold_unreachable(); | |
888 | } | |
889 | ||
890 | template<int size, bool big_endian> | |
891 | void | |
892 | Output_data_dynamic::sized_write(Output_file* of) | |
893 | { | |
894 | const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
895 | ||
896 | const off_t offset = this->offset(); | |
897 | const off_t oview_size = this->data_size(); | |
898 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
899 | ||
900 | unsigned char* pov = oview; | |
901 | for (typename Dynamic_entries::const_iterator p = this->entries_.begin(); | |
902 | p != this->entries_.end(); | |
903 | ++p) | |
904 | { | |
1ddbd1e6 ILT |
905 | p->write SELECT_SIZE_ENDIAN_NAME(size, big_endian)( |
906 | pov, this->pool_ SELECT_SIZE_ENDIAN(size, big_endian)); | |
a3ad94ed ILT |
907 | pov += dyn_size; |
908 | } | |
909 | ||
910 | gold_assert(pov - oview == oview_size); | |
911 | ||
912 | of->write_output_view(offset, oview_size, oview); | |
913 | ||
914 | // We no longer need the dynamic entries. | |
915 | this->entries_.clear(); | |
916 | } | |
917 | ||
ead1e424 ILT |
918 | // Output_section::Input_section methods. |
919 | ||
920 | // Return the data size. For an input section we store the size here. | |
921 | // For an Output_section_data, we have to ask it for the size. | |
922 | ||
923 | off_t | |
924 | Output_section::Input_section::data_size() const | |
925 | { | |
926 | if (this->is_input_section()) | |
b8e6aad9 | 927 | return this->u1_.data_size; |
ead1e424 | 928 | else |
b8e6aad9 | 929 | return this->u2_.posd->data_size(); |
ead1e424 ILT |
930 | } |
931 | ||
932 | // Set the address and file offset. | |
933 | ||
934 | void | |
935 | Output_section::Input_section::set_address(uint64_t addr, off_t off, | |
936 | off_t secoff) | |
937 | { | |
938 | if (this->is_input_section()) | |
b8e6aad9 | 939 | this->u2_.object->set_section_offset(this->shndx_, off - secoff); |
ead1e424 | 940 | else |
b8e6aad9 ILT |
941 | this->u2_.posd->set_address(addr, off); |
942 | } | |
943 | ||
944 | // Try to turn an input address into an output address. | |
945 | ||
946 | bool | |
947 | Output_section::Input_section::output_address(const Relobj* object, | |
948 | unsigned int shndx, | |
949 | off_t offset, | |
950 | uint64_t output_section_address, | |
951 | uint64_t *poutput) const | |
952 | { | |
953 | if (!this->is_input_section()) | |
954 | return this->u2_.posd->output_address(object, shndx, offset, | |
955 | output_section_address, poutput); | |
956 | else | |
957 | { | |
9d7094e8 ILT |
958 | if (this->shndx_ != shndx |
959 | || this->u2_.object != object) | |
b8e6aad9 ILT |
960 | return false; |
961 | off_t output_offset; | |
962 | Output_section* os = object->output_section(shndx, &output_offset); | |
963 | gold_assert(os != NULL); | |
964 | *poutput = output_section_address + output_offset + offset; | |
965 | return true; | |
966 | } | |
ead1e424 ILT |
967 | } |
968 | ||
969 | // Write out the data. We don't have to do anything for an input | |
970 | // section--they are handled via Object::relocate--but this is where | |
971 | // we write out the data for an Output_section_data. | |
972 | ||
973 | void | |
974 | Output_section::Input_section::write(Output_file* of) | |
975 | { | |
976 | if (!this->is_input_section()) | |
b8e6aad9 | 977 | this->u2_.posd->write(of); |
ead1e424 ILT |
978 | } |
979 | ||
a2fb1b05 ILT |
980 | // Output_section methods. |
981 | ||
982 | // Construct an Output_section. NAME will point into a Stringpool. | |
983 | ||
984 | Output_section::Output_section(const char* name, elfcpp::Elf_Word type, | |
b8e6aad9 | 985 | elfcpp::Elf_Xword flags) |
a2fb1b05 | 986 | : name_(name), |
a2fb1b05 ILT |
987 | addralign_(0), |
988 | entsize_(0), | |
16649710 | 989 | link_section_(NULL), |
a2fb1b05 | 990 | link_(0), |
16649710 | 991 | info_section_(NULL), |
a2fb1b05 ILT |
992 | info_(0), |
993 | type_(type), | |
61ba1cf9 | 994 | flags_(flags), |
ead1e424 | 995 | out_shndx_(0), |
c06b7b0b ILT |
996 | symtab_index_(0), |
997 | dynsym_index_(0), | |
ead1e424 ILT |
998 | input_sections_(), |
999 | first_input_offset_(0), | |
c51e6221 | 1000 | fills_(), |
a3ad94ed | 1001 | needs_symtab_index_(false), |
16649710 ILT |
1002 | needs_dynsym_index_(false), |
1003 | should_link_to_symtab_(false), | |
1004 | should_link_to_dynsym_(false) | |
a2fb1b05 ILT |
1005 | { |
1006 | } | |
1007 | ||
54dc6425 ILT |
1008 | Output_section::~Output_section() |
1009 | { | |
1010 | } | |
1011 | ||
16649710 ILT |
1012 | // Set the entry size. |
1013 | ||
1014 | void | |
1015 | Output_section::set_entsize(uint64_t v) | |
1016 | { | |
1017 | if (this->entsize_ == 0) | |
1018 | this->entsize_ = v; | |
1019 | else | |
1020 | gold_assert(this->entsize_ == v); | |
1021 | } | |
1022 | ||
ead1e424 ILT |
1023 | // Add the input section SHNDX, with header SHDR, named SECNAME, in |
1024 | // OBJECT, to the Output_section. Return the offset of the input | |
1025 | // section within the output section. We don't always keep track of | |
a2fb1b05 ILT |
1026 | // input sections for an Output_section. Instead, each Object keeps |
1027 | // track of the Output_section for each of its input sections. | |
1028 | ||
1029 | template<int size, bool big_endian> | |
1030 | off_t | |
f6ce93d6 | 1031 | Output_section::add_input_section(Relobj* object, unsigned int shndx, |
ead1e424 | 1032 | const char* secname, |
a2fb1b05 ILT |
1033 | const elfcpp::Shdr<size, big_endian>& shdr) |
1034 | { | |
1035 | elfcpp::Elf_Xword addralign = shdr.get_sh_addralign(); | |
1036 | if ((addralign & (addralign - 1)) != 0) | |
1037 | { | |
75f2446e ILT |
1038 | object->error(_("invalid alignment %lu for section \"%s\""), |
1039 | static_cast<unsigned long>(addralign), secname); | |
1040 | addralign = 1; | |
a2fb1b05 | 1041 | } |
a2fb1b05 ILT |
1042 | |
1043 | if (addralign > this->addralign_) | |
1044 | this->addralign_ = addralign; | |
1045 | ||
b8e6aad9 ILT |
1046 | // If this is a SHF_MERGE section, we pass all the input sections to |
1047 | // a Output_data_merge. | |
1048 | if ((shdr.get_sh_flags() & elfcpp::SHF_MERGE) != 0) | |
1049 | { | |
1050 | if (this->add_merge_input_section(object, shndx, shdr.get_sh_flags(), | |
1051 | shdr.get_sh_entsize(), | |
1052 | addralign)) | |
1053 | { | |
1054 | // Tell the relocation routines that they need to call the | |
1055 | // output_address method to determine the final address. | |
1056 | return -1; | |
1057 | } | |
1058 | } | |
1059 | ||
c51e6221 ILT |
1060 | off_t offset_in_section = this->data_size(); |
1061 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
1062 | addralign); | |
1063 | ||
1064 | if (aligned_offset_in_section > offset_in_section | |
1065 | && (shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0 | |
1066 | && object->target()->has_code_fill()) | |
1067 | { | |
1068 | // We need to add some fill data. Using fill_list_ when | |
1069 | // possible is an optimization, since we will often have fill | |
1070 | // sections without input sections. | |
1071 | off_t fill_len = aligned_offset_in_section - offset_in_section; | |
1072 | if (this->input_sections_.empty()) | |
1073 | this->fills_.push_back(Fill(offset_in_section, fill_len)); | |
1074 | else | |
1075 | { | |
1076 | // FIXME: When relaxing, the size needs to adjust to | |
1077 | // maintain a constant alignment. | |
1078 | std::string fill_data(object->target()->code_fill(fill_len)); | |
1079 | Output_data_const* odc = new Output_data_const(fill_data, 1); | |
1080 | this->input_sections_.push_back(Input_section(odc)); | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | this->set_data_size(aligned_offset_in_section + shdr.get_sh_size()); | |
a2fb1b05 | 1085 | |
ead1e424 ILT |
1086 | // We need to keep track of this section if we are already keeping |
1087 | // track of sections, or if we are relaxing. FIXME: Add test for | |
1088 | // relaxing. | |
c51e6221 | 1089 | if (!this->input_sections_.empty()) |
ead1e424 ILT |
1090 | this->input_sections_.push_back(Input_section(object, shndx, |
1091 | shdr.get_sh_size(), | |
1092 | addralign)); | |
54dc6425 | 1093 | |
c51e6221 | 1094 | return aligned_offset_in_section; |
61ba1cf9 ILT |
1095 | } |
1096 | ||
ead1e424 ILT |
1097 | // Add arbitrary data to an output section. |
1098 | ||
1099 | void | |
1100 | Output_section::add_output_section_data(Output_section_data* posd) | |
1101 | { | |
b8e6aad9 ILT |
1102 | Input_section inp(posd); |
1103 | this->add_output_section_data(&inp); | |
1104 | } | |
1105 | ||
1106 | // Add arbitrary data to an output section by Input_section. | |
c06b7b0b | 1107 | |
b8e6aad9 ILT |
1108 | void |
1109 | Output_section::add_output_section_data(Input_section* inp) | |
1110 | { | |
ead1e424 ILT |
1111 | if (this->input_sections_.empty()) |
1112 | this->first_input_offset_ = this->data_size(); | |
c06b7b0b | 1113 | |
b8e6aad9 | 1114 | this->input_sections_.push_back(*inp); |
c06b7b0b | 1115 | |
b8e6aad9 | 1116 | uint64_t addralign = inp->addralign(); |
ead1e424 ILT |
1117 | if (addralign > this->addralign_) |
1118 | this->addralign_ = addralign; | |
c06b7b0b | 1119 | |
b8e6aad9 ILT |
1120 | inp->set_output_section(this); |
1121 | } | |
1122 | ||
1123 | // Add a merge section to an output section. | |
1124 | ||
1125 | void | |
1126 | Output_section::add_output_merge_section(Output_section_data* posd, | |
1127 | bool is_string, uint64_t entsize) | |
1128 | { | |
1129 | Input_section inp(posd, is_string, entsize); | |
1130 | this->add_output_section_data(&inp); | |
1131 | } | |
1132 | ||
1133 | // Add an input section to a SHF_MERGE section. | |
1134 | ||
1135 | bool | |
1136 | Output_section::add_merge_input_section(Relobj* object, unsigned int shndx, | |
1137 | uint64_t flags, uint64_t entsize, | |
1138 | uint64_t addralign) | |
1139 | { | |
1140 | // We only merge constants if the alignment is not more than the | |
1141 | // entry size. This could be handled, but it's unusual. | |
1142 | if (addralign > entsize) | |
1143 | return false; | |
1144 | ||
1145 | bool is_string = (flags & elfcpp::SHF_STRINGS) != 0; | |
1146 | Input_section_list::iterator p; | |
1147 | for (p = this->input_sections_.begin(); | |
1148 | p != this->input_sections_.end(); | |
1149 | ++p) | |
1150 | if (p->is_merge_section(is_string, entsize)) | |
1151 | break; | |
1152 | ||
1153 | // We handle the actual constant merging in Output_merge_data or | |
1154 | // Output_merge_string_data. | |
1155 | if (p != this->input_sections_.end()) | |
1156 | p->add_input_section(object, shndx); | |
1157 | else | |
1158 | { | |
1159 | Output_section_data* posd; | |
1160 | if (!is_string) | |
1161 | posd = new Output_merge_data(entsize); | |
1162 | else if (entsize == 1) | |
1163 | posd = new Output_merge_string<char>(); | |
1164 | else if (entsize == 2) | |
1165 | posd = new Output_merge_string<uint16_t>(); | |
1166 | else if (entsize == 4) | |
1167 | posd = new Output_merge_string<uint32_t>(); | |
1168 | else | |
1169 | return false; | |
1170 | ||
1171 | this->add_output_merge_section(posd, is_string, entsize); | |
1172 | posd->add_input_section(object, shndx); | |
1173 | } | |
1174 | ||
1175 | return true; | |
1176 | } | |
1177 | ||
1178 | // Return the output virtual address of OFFSET relative to the start | |
1179 | // of input section SHNDX in object OBJECT. | |
1180 | ||
1181 | uint64_t | |
1182 | Output_section::output_address(const Relobj* object, unsigned int shndx, | |
1183 | off_t offset) const | |
1184 | { | |
1185 | uint64_t addr = this->address() + this->first_input_offset_; | |
1186 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1187 | p != this->input_sections_.end(); | |
1188 | ++p) | |
1189 | { | |
1190 | addr = align_address(addr, p->addralign()); | |
1191 | uint64_t output; | |
1192 | if (p->output_address(object, shndx, offset, addr, &output)) | |
1193 | return output; | |
1194 | addr += p->data_size(); | |
1195 | } | |
1196 | ||
1197 | // If we get here, it means that we don't know the mapping for this | |
1198 | // input section. This might happen in principle if | |
1199 | // add_input_section were called before add_output_section_data. | |
1200 | // But it should never actually happen. | |
1201 | ||
1202 | gold_unreachable(); | |
ead1e424 ILT |
1203 | } |
1204 | ||
1205 | // Set the address of an Output_section. This is where we handle | |
1206 | // setting the addresses of any Output_section_data objects. | |
1207 | ||
1208 | void | |
1209 | Output_section::do_set_address(uint64_t address, off_t startoff) | |
1210 | { | |
1211 | if (this->input_sections_.empty()) | |
1212 | return; | |
1213 | ||
1214 | off_t off = startoff + this->first_input_offset_; | |
1215 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
1216 | p != this->input_sections_.end(); | |
1217 | ++p) | |
1218 | { | |
1219 | off = align_address(off, p->addralign()); | |
1220 | p->set_address(address + (off - startoff), off, startoff); | |
1221 | off += p->data_size(); | |
1222 | } | |
1223 | ||
1224 | this->set_data_size(off - startoff); | |
1225 | } | |
1226 | ||
61ba1cf9 ILT |
1227 | // Write the section header to *OSHDR. |
1228 | ||
1229 | template<int size, bool big_endian> | |
1230 | void | |
16649710 ILT |
1231 | Output_section::write_header(const Layout* layout, |
1232 | const Stringpool* secnamepool, | |
61ba1cf9 ILT |
1233 | elfcpp::Shdr_write<size, big_endian>* oshdr) const |
1234 | { | |
1235 | oshdr->put_sh_name(secnamepool->get_offset(this->name_)); | |
1236 | oshdr->put_sh_type(this->type_); | |
1237 | oshdr->put_sh_flags(this->flags_); | |
1238 | oshdr->put_sh_addr(this->address()); | |
1239 | oshdr->put_sh_offset(this->offset()); | |
1240 | oshdr->put_sh_size(this->data_size()); | |
16649710 ILT |
1241 | if (this->link_section_ != NULL) |
1242 | oshdr->put_sh_link(this->link_section_->out_shndx()); | |
1243 | else if (this->should_link_to_symtab_) | |
1244 | oshdr->put_sh_link(layout->symtab_section()->out_shndx()); | |
1245 | else if (this->should_link_to_dynsym_) | |
1246 | oshdr->put_sh_link(layout->dynsym_section()->out_shndx()); | |
1247 | else | |
1248 | oshdr->put_sh_link(this->link_); | |
1249 | if (this->info_section_ != NULL) | |
1250 | oshdr->put_sh_info(this->info_section_->out_shndx()); | |
1251 | else | |
1252 | oshdr->put_sh_info(this->info_); | |
61ba1cf9 ILT |
1253 | oshdr->put_sh_addralign(this->addralign_); |
1254 | oshdr->put_sh_entsize(this->entsize_); | |
a2fb1b05 ILT |
1255 | } |
1256 | ||
ead1e424 ILT |
1257 | // Write out the data. For input sections the data is written out by |
1258 | // Object::relocate, but we have to handle Output_section_data objects | |
1259 | // here. | |
1260 | ||
1261 | void | |
1262 | Output_section::do_write(Output_file* of) | |
1263 | { | |
c51e6221 ILT |
1264 | off_t output_section_file_offset = this->offset(); |
1265 | for (Fill_list::iterator p = this->fills_.begin(); | |
1266 | p != this->fills_.end(); | |
1267 | ++p) | |
1268 | { | |
1269 | std::string fill_data(of->target()->code_fill(p->length())); | |
1270 | of->write(output_section_file_offset + p->section_offset(), | |
1271 | fill_data.data(), fill_data.size()); | |
1272 | } | |
1273 | ||
ead1e424 ILT |
1274 | for (Input_section_list::iterator p = this->input_sections_.begin(); |
1275 | p != this->input_sections_.end(); | |
1276 | ++p) | |
1277 | p->write(of); | |
1278 | } | |
1279 | ||
a2fb1b05 ILT |
1280 | // Output segment methods. |
1281 | ||
1282 | Output_segment::Output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags) | |
54dc6425 | 1283 | : output_data_(), |
75f65a3e | 1284 | output_bss_(), |
a2fb1b05 ILT |
1285 | vaddr_(0), |
1286 | paddr_(0), | |
1287 | memsz_(0), | |
1288 | align_(0), | |
1289 | offset_(0), | |
1290 | filesz_(0), | |
1291 | type_(type), | |
ead1e424 ILT |
1292 | flags_(flags), |
1293 | is_align_known_(false) | |
a2fb1b05 ILT |
1294 | { |
1295 | } | |
1296 | ||
1297 | // Add an Output_section to an Output_segment. | |
1298 | ||
1299 | void | |
75f65a3e | 1300 | Output_segment::add_output_section(Output_section* os, |
dbe717ef ILT |
1301 | elfcpp::Elf_Word seg_flags, |
1302 | bool front) | |
a2fb1b05 | 1303 | { |
a3ad94ed ILT |
1304 | gold_assert((os->flags() & elfcpp::SHF_ALLOC) != 0); |
1305 | gold_assert(!this->is_align_known_); | |
75f65a3e | 1306 | |
ead1e424 | 1307 | // Update the segment flags. |
75f65a3e | 1308 | this->flags_ |= seg_flags; |
75f65a3e ILT |
1309 | |
1310 | Output_segment::Output_data_list* pdl; | |
1311 | if (os->type() == elfcpp::SHT_NOBITS) | |
1312 | pdl = &this->output_bss_; | |
1313 | else | |
1314 | pdl = &this->output_data_; | |
54dc6425 | 1315 | |
a2fb1b05 ILT |
1316 | // So that PT_NOTE segments will work correctly, we need to ensure |
1317 | // that all SHT_NOTE sections are adjacent. This will normally | |
1318 | // happen automatically, because all the SHT_NOTE input sections | |
1319 | // will wind up in the same output section. However, it is possible | |
1320 | // for multiple SHT_NOTE input sections to have different section | |
1321 | // flags, and thus be in different output sections, but for the | |
1322 | // different section flags to map into the same segment flags and | |
1323 | // thus the same output segment. | |
54dc6425 ILT |
1324 | |
1325 | // Note that while there may be many input sections in an output | |
1326 | // section, there are normally only a few output sections in an | |
1327 | // output segment. This loop is expected to be fast. | |
1328 | ||
61ba1cf9 | 1329 | if (os->type() == elfcpp::SHT_NOTE && !pdl->empty()) |
a2fb1b05 | 1330 | { |
a3ad94ed | 1331 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 1332 | do |
54dc6425 | 1333 | { |
75f65a3e | 1334 | --p; |
54dc6425 ILT |
1335 | if ((*p)->is_section_type(elfcpp::SHT_NOTE)) |
1336 | { | |
dbe717ef | 1337 | // We don't worry about the FRONT parameter. |
54dc6425 | 1338 | ++p; |
75f65a3e | 1339 | pdl->insert(p, os); |
54dc6425 ILT |
1340 | return; |
1341 | } | |
1342 | } | |
75f65a3e | 1343 | while (p != pdl->begin()); |
54dc6425 ILT |
1344 | } |
1345 | ||
1346 | // Similarly, so that PT_TLS segments will work, we need to group | |
75f65a3e ILT |
1347 | // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special |
1348 | // case: we group the SHF_TLS/SHT_NOBITS sections right after the | |
1349 | // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS | |
1350 | // correctly. | |
61ba1cf9 | 1351 | if ((os->flags() & elfcpp::SHF_TLS) != 0 && !this->output_data_.empty()) |
54dc6425 | 1352 | { |
75f65a3e ILT |
1353 | pdl = &this->output_data_; |
1354 | bool nobits = os->type() == elfcpp::SHT_NOBITS; | |
ead1e424 | 1355 | bool sawtls = false; |
a3ad94ed | 1356 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 1357 | do |
a2fb1b05 | 1358 | { |
75f65a3e | 1359 | --p; |
ead1e424 ILT |
1360 | bool insert; |
1361 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
1362 | { | |
1363 | sawtls = true; | |
1364 | // Put a NOBITS section after the first TLS section. | |
1365 | // But a PROGBITS section after the first TLS/PROGBITS | |
1366 | // section. | |
1367 | insert = nobits || !(*p)->is_section_type(elfcpp::SHT_NOBITS); | |
1368 | } | |
1369 | else | |
1370 | { | |
1371 | // If we've gone past the TLS sections, but we've seen a | |
1372 | // TLS section, then we need to insert this section now. | |
1373 | insert = sawtls; | |
1374 | } | |
1375 | ||
1376 | if (insert) | |
a2fb1b05 | 1377 | { |
dbe717ef | 1378 | // We don't worry about the FRONT parameter. |
a2fb1b05 | 1379 | ++p; |
75f65a3e | 1380 | pdl->insert(p, os); |
a2fb1b05 ILT |
1381 | return; |
1382 | } | |
1383 | } | |
75f65a3e | 1384 | while (p != pdl->begin()); |
ead1e424 | 1385 | |
dbe717ef ILT |
1386 | // There are no TLS sections yet; put this one at the requested |
1387 | // location in the section list. | |
a2fb1b05 ILT |
1388 | } |
1389 | ||
dbe717ef ILT |
1390 | if (front) |
1391 | pdl->push_front(os); | |
1392 | else | |
1393 | pdl->push_back(os); | |
75f65a3e ILT |
1394 | } |
1395 | ||
1396 | // Add an Output_data (which is not an Output_section) to the start of | |
1397 | // a segment. | |
1398 | ||
1399 | void | |
1400 | Output_segment::add_initial_output_data(Output_data* od) | |
1401 | { | |
a3ad94ed | 1402 | gold_assert(!this->is_align_known_); |
75f65a3e ILT |
1403 | this->output_data_.push_front(od); |
1404 | } | |
1405 | ||
1406 | // Return the maximum alignment of the Output_data in Output_segment. | |
ead1e424 | 1407 | // Once we compute this, we prohibit new sections from being added. |
75f65a3e ILT |
1408 | |
1409 | uint64_t | |
ead1e424 | 1410 | Output_segment::addralign() |
75f65a3e | 1411 | { |
ead1e424 ILT |
1412 | if (!this->is_align_known_) |
1413 | { | |
1414 | uint64_t addralign; | |
1415 | ||
1416 | addralign = Output_segment::maximum_alignment(&this->output_data_); | |
1417 | if (addralign > this->align_) | |
1418 | this->align_ = addralign; | |
1419 | ||
1420 | addralign = Output_segment::maximum_alignment(&this->output_bss_); | |
1421 | if (addralign > this->align_) | |
1422 | this->align_ = addralign; | |
1423 | ||
1424 | this->is_align_known_ = true; | |
1425 | } | |
1426 | ||
75f65a3e ILT |
1427 | return this->align_; |
1428 | } | |
1429 | ||
ead1e424 ILT |
1430 | // Return the maximum alignment of a list of Output_data. |
1431 | ||
1432 | uint64_t | |
1433 | Output_segment::maximum_alignment(const Output_data_list* pdl) | |
1434 | { | |
1435 | uint64_t ret = 0; | |
1436 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1437 | p != pdl->end(); | |
1438 | ++p) | |
1439 | { | |
1440 | uint64_t addralign = (*p)->addralign(); | |
1441 | if (addralign > ret) | |
1442 | ret = addralign; | |
1443 | } | |
1444 | return ret; | |
1445 | } | |
1446 | ||
75f65a3e | 1447 | // Set the section addresses for an Output_segment. ADDR is the |
ead1e424 ILT |
1448 | // address and *POFF is the file offset. Set the section indexes |
1449 | // starting with *PSHNDX. Return the address of the immediately | |
1450 | // following segment. Update *POFF and *PSHNDX. | |
75f65a3e ILT |
1451 | |
1452 | uint64_t | |
ead1e424 ILT |
1453 | Output_segment::set_section_addresses(uint64_t addr, off_t* poff, |
1454 | unsigned int* pshndx) | |
75f65a3e | 1455 | { |
a3ad94ed | 1456 | gold_assert(this->type_ == elfcpp::PT_LOAD); |
75f65a3e ILT |
1457 | |
1458 | this->vaddr_ = addr; | |
1459 | this->paddr_ = addr; | |
1460 | ||
1461 | off_t orig_off = *poff; | |
1462 | this->offset_ = orig_off; | |
1463 | ||
ead1e424 ILT |
1464 | *poff = align_address(*poff, this->addralign()); |
1465 | ||
1466 | addr = this->set_section_list_addresses(&this->output_data_, addr, poff, | |
1467 | pshndx); | |
75f65a3e ILT |
1468 | this->filesz_ = *poff - orig_off; |
1469 | ||
1470 | off_t off = *poff; | |
1471 | ||
61ba1cf9 | 1472 | uint64_t ret = this->set_section_list_addresses(&this->output_bss_, addr, |
ead1e424 | 1473 | poff, pshndx); |
75f65a3e ILT |
1474 | this->memsz_ = *poff - orig_off; |
1475 | ||
1476 | // Ignore the file offset adjustments made by the BSS Output_data | |
1477 | // objects. | |
1478 | *poff = off; | |
61ba1cf9 ILT |
1479 | |
1480 | return ret; | |
75f65a3e ILT |
1481 | } |
1482 | ||
b8e6aad9 ILT |
1483 | // Set the addresses and file offsets in a list of Output_data |
1484 | // structures. | |
75f65a3e ILT |
1485 | |
1486 | uint64_t | |
1487 | Output_segment::set_section_list_addresses(Output_data_list* pdl, | |
ead1e424 ILT |
1488 | uint64_t addr, off_t* poff, |
1489 | unsigned int* pshndx) | |
75f65a3e | 1490 | { |
ead1e424 | 1491 | off_t startoff = *poff; |
75f65a3e | 1492 | |
ead1e424 | 1493 | off_t off = startoff; |
75f65a3e ILT |
1494 | for (Output_data_list::iterator p = pdl->begin(); |
1495 | p != pdl->end(); | |
1496 | ++p) | |
1497 | { | |
ead1e424 ILT |
1498 | off = align_address(off, (*p)->addralign()); |
1499 | (*p)->set_address(addr + (off - startoff), off); | |
1500 | ||
1501 | // Unless this is a PT_TLS segment, we want to ignore the size | |
1502 | // of a SHF_TLS/SHT_NOBITS section. Such a section does not | |
1503 | // affect the size of a PT_LOAD segment. | |
1504 | if (this->type_ == elfcpp::PT_TLS | |
1505 | || !(*p)->is_section_flag_set(elfcpp::SHF_TLS) | |
1506 | || !(*p)->is_section_type(elfcpp::SHT_NOBITS)) | |
1507 | off += (*p)->data_size(); | |
75f65a3e | 1508 | |
ead1e424 ILT |
1509 | if ((*p)->is_section()) |
1510 | { | |
1511 | (*p)->set_out_shndx(*pshndx); | |
1512 | ++*pshndx; | |
1513 | } | |
75f65a3e ILT |
1514 | } |
1515 | ||
1516 | *poff = off; | |
ead1e424 | 1517 | return addr + (off - startoff); |
75f65a3e ILT |
1518 | } |
1519 | ||
1520 | // For a non-PT_LOAD segment, set the offset from the sections, if | |
1521 | // any. | |
1522 | ||
1523 | void | |
1524 | Output_segment::set_offset() | |
1525 | { | |
a3ad94ed | 1526 | gold_assert(this->type_ != elfcpp::PT_LOAD); |
75f65a3e ILT |
1527 | |
1528 | if (this->output_data_.empty() && this->output_bss_.empty()) | |
1529 | { | |
1530 | this->vaddr_ = 0; | |
1531 | this->paddr_ = 0; | |
1532 | this->memsz_ = 0; | |
1533 | this->align_ = 0; | |
1534 | this->offset_ = 0; | |
1535 | this->filesz_ = 0; | |
1536 | return; | |
1537 | } | |
1538 | ||
1539 | const Output_data* first; | |
1540 | if (this->output_data_.empty()) | |
1541 | first = this->output_bss_.front(); | |
1542 | else | |
1543 | first = this->output_data_.front(); | |
1544 | this->vaddr_ = first->address(); | |
1545 | this->paddr_ = this->vaddr_; | |
1546 | this->offset_ = first->offset(); | |
1547 | ||
1548 | if (this->output_data_.empty()) | |
1549 | this->filesz_ = 0; | |
1550 | else | |
1551 | { | |
1552 | const Output_data* last_data = this->output_data_.back(); | |
1553 | this->filesz_ = (last_data->address() | |
1554 | + last_data->data_size() | |
1555 | - this->vaddr_); | |
1556 | } | |
1557 | ||
1558 | const Output_data* last; | |
1559 | if (this->output_bss_.empty()) | |
1560 | last = this->output_data_.back(); | |
1561 | else | |
1562 | last = this->output_bss_.back(); | |
1563 | this->memsz_ = (last->address() | |
1564 | + last->data_size() | |
1565 | - this->vaddr_); | |
75f65a3e ILT |
1566 | } |
1567 | ||
1568 | // Return the number of Output_sections in an Output_segment. | |
1569 | ||
1570 | unsigned int | |
1571 | Output_segment::output_section_count() const | |
1572 | { | |
1573 | return (this->output_section_count_list(&this->output_data_) | |
1574 | + this->output_section_count_list(&this->output_bss_)); | |
1575 | } | |
1576 | ||
1577 | // Return the number of Output_sections in an Output_data_list. | |
1578 | ||
1579 | unsigned int | |
1580 | Output_segment::output_section_count_list(const Output_data_list* pdl) const | |
1581 | { | |
1582 | unsigned int count = 0; | |
1583 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1584 | p != pdl->end(); | |
1585 | ++p) | |
1586 | { | |
1587 | if ((*p)->is_section()) | |
1588 | ++count; | |
1589 | } | |
1590 | return count; | |
a2fb1b05 ILT |
1591 | } |
1592 | ||
61ba1cf9 ILT |
1593 | // Write the segment data into *OPHDR. |
1594 | ||
1595 | template<int size, bool big_endian> | |
1596 | void | |
ead1e424 | 1597 | Output_segment::write_header(elfcpp::Phdr_write<size, big_endian>* ophdr) |
61ba1cf9 ILT |
1598 | { |
1599 | ophdr->put_p_type(this->type_); | |
1600 | ophdr->put_p_offset(this->offset_); | |
1601 | ophdr->put_p_vaddr(this->vaddr_); | |
1602 | ophdr->put_p_paddr(this->paddr_); | |
1603 | ophdr->put_p_filesz(this->filesz_); | |
1604 | ophdr->put_p_memsz(this->memsz_); | |
1605 | ophdr->put_p_flags(this->flags_); | |
ead1e424 | 1606 | ophdr->put_p_align(this->addralign()); |
61ba1cf9 ILT |
1607 | } |
1608 | ||
1609 | // Write the section headers into V. | |
1610 | ||
1611 | template<int size, bool big_endian> | |
1612 | unsigned char* | |
16649710 ILT |
1613 | Output_segment::write_section_headers(const Layout* layout, |
1614 | const Stringpool* secnamepool, | |
ead1e424 ILT |
1615 | unsigned char* v, |
1616 | unsigned int *pshndx | |
5482377d ILT |
1617 | ACCEPT_SIZE_ENDIAN) const |
1618 | { | |
ead1e424 ILT |
1619 | // Every section that is attached to a segment must be attached to a |
1620 | // PT_LOAD segment, so we only write out section headers for PT_LOAD | |
1621 | // segments. | |
1622 | if (this->type_ != elfcpp::PT_LOAD) | |
1623 | return v; | |
1624 | ||
593f47df ILT |
1625 | v = this->write_section_headers_list |
1626 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 1627 | layout, secnamepool, &this->output_data_, v, pshndx |
593f47df ILT |
1628 | SELECT_SIZE_ENDIAN(size, big_endian)); |
1629 | v = this->write_section_headers_list | |
1630 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 1631 | layout, secnamepool, &this->output_bss_, v, pshndx |
593f47df | 1632 | SELECT_SIZE_ENDIAN(size, big_endian)); |
61ba1cf9 ILT |
1633 | return v; |
1634 | } | |
1635 | ||
1636 | template<int size, bool big_endian> | |
1637 | unsigned char* | |
16649710 ILT |
1638 | Output_segment::write_section_headers_list(const Layout* layout, |
1639 | const Stringpool* secnamepool, | |
61ba1cf9 | 1640 | const Output_data_list* pdl, |
ead1e424 ILT |
1641 | unsigned char* v, |
1642 | unsigned int* pshndx | |
5482377d | 1643 | ACCEPT_SIZE_ENDIAN) const |
61ba1cf9 ILT |
1644 | { |
1645 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1646 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1647 | p != pdl->end(); | |
1648 | ++p) | |
1649 | { | |
1650 | if ((*p)->is_section()) | |
1651 | { | |
5482377d | 1652 | const Output_section* ps = static_cast<const Output_section*>(*p); |
a3ad94ed | 1653 | gold_assert(*pshndx == ps->out_shndx()); |
61ba1cf9 | 1654 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 1655 | ps->write_header(layout, secnamepool, &oshdr); |
61ba1cf9 | 1656 | v += shdr_size; |
ead1e424 | 1657 | ++*pshndx; |
61ba1cf9 ILT |
1658 | } |
1659 | } | |
1660 | return v; | |
1661 | } | |
1662 | ||
a2fb1b05 ILT |
1663 | // Output_file methods. |
1664 | ||
c51e6221 | 1665 | Output_file::Output_file(const General_options& options, Target* target) |
61ba1cf9 | 1666 | : options_(options), |
c51e6221 | 1667 | target_(target), |
61ba1cf9 ILT |
1668 | name_(options.output_file_name()), |
1669 | o_(-1), | |
1670 | file_size_(0), | |
1671 | base_(NULL) | |
1672 | { | |
1673 | } | |
1674 | ||
1675 | // Open the output file. | |
1676 | ||
a2fb1b05 | 1677 | void |
61ba1cf9 | 1678 | Output_file::open(off_t file_size) |
a2fb1b05 | 1679 | { |
61ba1cf9 ILT |
1680 | this->file_size_ = file_size; |
1681 | ||
4e9d8586 ILT |
1682 | // Unlink the file first; otherwise the open() may fail if the file |
1683 | // is busy (e.g. it's an executable that's currently being executed). | |
1684 | // | |
1685 | // However, the linker may be part of a system where a zero-length | |
1686 | // file is created for it to write to, with tight permissions (gcc | |
1687 | // 2.95 did something like this). Unlinking the file would work | |
1688 | // around those permission controls, so we only unlink if the file | |
1689 | // has a non-zero size. We also unlink only regular files to avoid | |
1690 | // trouble with directories/etc. | |
1691 | // | |
1692 | // If we fail, continue; this command is merely a best-effort attempt | |
1693 | // to improve the odds for open(). | |
1694 | ||
4e9d8586 | 1695 | struct stat s; |
5ffcaa86 ILT |
1696 | if (::stat(this->name_, &s) == 0 && s.st_size != 0) |
1697 | unlink_if_ordinary(this->name_); | |
4e9d8586 | 1698 | |
7e1edb90 | 1699 | int mode = parameters->output_is_object() ? 0666 : 0777; |
61ba1cf9 ILT |
1700 | int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode); |
1701 | if (o < 0) | |
75f2446e | 1702 | gold_fatal(_("%s: open: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
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) | |
75f2446e | 1707 | gold_fatal(_("%s: lseek: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1708 | char b = 0; |
1709 | if (::write(o, &b, 1) != 1) | |
75f2446e | 1710 | gold_fatal(_("%s: write: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1711 | |
1712 | // Map the file into memory. | |
1713 | void* base = ::mmap(NULL, file_size, PROT_READ | PROT_WRITE, | |
1714 | MAP_SHARED, o, 0); | |
1715 | if (base == MAP_FAILED) | |
75f2446e | 1716 | gold_fatal(_("%s: mmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1717 | this->base_ = static_cast<unsigned char*>(base); |
1718 | } | |
1719 | ||
1720 | // Close the output file. | |
1721 | ||
1722 | void | |
1723 | Output_file::close() | |
1724 | { | |
1725 | if (::munmap(this->base_, this->file_size_) < 0) | |
a0c4fb0a | 1726 | gold_error(_("%s: munmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1727 | this->base_ = NULL; |
1728 | ||
1729 | if (::close(this->o_) < 0) | |
75f2446e | 1730 | gold_error(_("%s: close: %s"), this->name_, strerror(errno)); |
61ba1cf9 | 1731 | this->o_ = -1; |
a2fb1b05 ILT |
1732 | } |
1733 | ||
1734 | // Instantiate the templates we need. We could use the configure | |
1735 | // script to restrict this to only the ones for implemented targets. | |
1736 | ||
193a53d9 | 1737 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
1738 | template |
1739 | off_t | |
1740 | Output_section::add_input_section<32, false>( | |
f6ce93d6 | 1741 | Relobj* object, |
ead1e424 | 1742 | unsigned int shndx, |
a2fb1b05 ILT |
1743 | const char* secname, |
1744 | const elfcpp::Shdr<32, false>& shdr); | |
193a53d9 | 1745 | #endif |
a2fb1b05 | 1746 | |
193a53d9 | 1747 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
1748 | template |
1749 | off_t | |
1750 | Output_section::add_input_section<32, true>( | |
f6ce93d6 | 1751 | Relobj* object, |
ead1e424 | 1752 | unsigned int shndx, |
a2fb1b05 ILT |
1753 | const char* secname, |
1754 | const elfcpp::Shdr<32, true>& shdr); | |
193a53d9 | 1755 | #endif |
a2fb1b05 | 1756 | |
193a53d9 | 1757 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
1758 | template |
1759 | off_t | |
1760 | Output_section::add_input_section<64, false>( | |
f6ce93d6 | 1761 | Relobj* object, |
ead1e424 | 1762 | unsigned int shndx, |
a2fb1b05 ILT |
1763 | const char* secname, |
1764 | const elfcpp::Shdr<64, false>& shdr); | |
193a53d9 | 1765 | #endif |
a2fb1b05 | 1766 | |
193a53d9 | 1767 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
1768 | template |
1769 | off_t | |
1770 | Output_section::add_input_section<64, true>( | |
f6ce93d6 | 1771 | Relobj* object, |
ead1e424 | 1772 | unsigned int shndx, |
a2fb1b05 ILT |
1773 | const char* secname, |
1774 | const elfcpp::Shdr<64, true>& shdr); | |
193a53d9 | 1775 | #endif |
a2fb1b05 | 1776 | |
193a53d9 | 1777 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1778 | template |
1779 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, false>; | |
193a53d9 | 1780 | #endif |
c06b7b0b | 1781 | |
193a53d9 | 1782 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1783 | template |
1784 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, true>; | |
193a53d9 | 1785 | #endif |
c06b7b0b | 1786 | |
193a53d9 | 1787 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1788 | template |
1789 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, false>; | |
193a53d9 | 1790 | #endif |
c06b7b0b | 1791 | |
193a53d9 | 1792 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1793 | template |
1794 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, true>; | |
193a53d9 | 1795 | #endif |
c06b7b0b | 1796 | |
193a53d9 | 1797 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1798 | template |
1799 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, false>; | |
193a53d9 | 1800 | #endif |
c06b7b0b | 1801 | |
193a53d9 | 1802 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1803 | template |
1804 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, true>; | |
193a53d9 | 1805 | #endif |
c06b7b0b | 1806 | |
193a53d9 | 1807 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1808 | template |
1809 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, false>; | |
193a53d9 | 1810 | #endif |
c06b7b0b | 1811 | |
193a53d9 | 1812 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1813 | template |
1814 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, true>; | |
193a53d9 | 1815 | #endif |
c06b7b0b | 1816 | |
193a53d9 | 1817 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1818 | template |
1819 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, false>; | |
193a53d9 | 1820 | #endif |
c06b7b0b | 1821 | |
193a53d9 | 1822 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1823 | template |
1824 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, true>; | |
193a53d9 | 1825 | #endif |
c06b7b0b | 1826 | |
193a53d9 | 1827 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1828 | template |
1829 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, false>; | |
193a53d9 | 1830 | #endif |
c06b7b0b | 1831 | |
193a53d9 | 1832 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1833 | template |
1834 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, true>; | |
193a53d9 | 1835 | #endif |
c06b7b0b | 1836 | |
193a53d9 | 1837 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1838 | template |
1839 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
193a53d9 | 1840 | #endif |
c06b7b0b | 1841 | |
193a53d9 | 1842 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1843 | template |
1844 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
193a53d9 | 1845 | #endif |
c06b7b0b | 1846 | |
193a53d9 | 1847 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1848 | template |
1849 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
193a53d9 | 1850 | #endif |
c06b7b0b | 1851 | |
193a53d9 | 1852 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1853 | template |
1854 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
193a53d9 | 1855 | #endif |
c06b7b0b | 1856 | |
193a53d9 | 1857 | #ifdef HAVE_TARGET_32_LITTLE |
ead1e424 | 1858 | template |
dbe717ef | 1859 | class Output_data_got<32, false>; |
193a53d9 | 1860 | #endif |
ead1e424 | 1861 | |
193a53d9 | 1862 | #ifdef HAVE_TARGET_32_BIG |
ead1e424 | 1863 | template |
dbe717ef | 1864 | class Output_data_got<32, true>; |
193a53d9 | 1865 | #endif |
ead1e424 | 1866 | |
193a53d9 | 1867 | #ifdef HAVE_TARGET_64_LITTLE |
ead1e424 | 1868 | template |
dbe717ef | 1869 | class Output_data_got<64, false>; |
193a53d9 | 1870 | #endif |
ead1e424 | 1871 | |
193a53d9 | 1872 | #ifdef HAVE_TARGET_64_BIG |
ead1e424 | 1873 | template |
dbe717ef | 1874 | class Output_data_got<64, true>; |
193a53d9 | 1875 | #endif |
ead1e424 | 1876 | |
a2fb1b05 | 1877 | } // End namespace gold. |