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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 | ||
730cdc88 ILT |
66 | // Return the default alignment for the target size. |
67 | ||
68 | uint64_t | |
69 | Output_data::default_alignment() | |
70 | { | |
71 | return Output_data::default_alignment_for_size(parameters->get_size()); | |
72 | } | |
73 | ||
75f65a3e ILT |
74 | // Return the default alignment for a size--32 or 64. |
75 | ||
76 | uint64_t | |
730cdc88 | 77 | Output_data::default_alignment_for_size(int size) |
75f65a3e ILT |
78 | { |
79 | if (size == 32) | |
80 | return 4; | |
81 | else if (size == 64) | |
82 | return 8; | |
83 | else | |
a3ad94ed | 84 | gold_unreachable(); |
75f65a3e ILT |
85 | } |
86 | ||
75f65a3e ILT |
87 | // Output_section_header methods. This currently assumes that the |
88 | // segment and section lists are complete at construction time. | |
89 | ||
90 | Output_section_headers::Output_section_headers( | |
16649710 ILT |
91 | const Layout* layout, |
92 | const Layout::Segment_list* segment_list, | |
93 | const Layout::Section_list* unattached_section_list, | |
61ba1cf9 | 94 | const Stringpool* secnamepool) |
9025d29d | 95 | : layout_(layout), |
75f65a3e | 96 | segment_list_(segment_list), |
a3ad94ed | 97 | unattached_section_list_(unattached_section_list), |
61ba1cf9 | 98 | secnamepool_(secnamepool) |
75f65a3e | 99 | { |
61ba1cf9 ILT |
100 | // Count all the sections. Start with 1 for the null section. |
101 | off_t count = 1; | |
16649710 ILT |
102 | for (Layout::Segment_list::const_iterator p = segment_list->begin(); |
103 | p != segment_list->end(); | |
75f65a3e | 104 | ++p) |
ead1e424 ILT |
105 | if ((*p)->type() == elfcpp::PT_LOAD) |
106 | count += (*p)->output_section_count(); | |
16649710 | 107 | count += unattached_section_list->size(); |
75f65a3e | 108 | |
9025d29d | 109 | const int size = parameters->get_size(); |
75f65a3e ILT |
110 | int shdr_size; |
111 | if (size == 32) | |
112 | shdr_size = elfcpp::Elf_sizes<32>::shdr_size; | |
113 | else if (size == 64) | |
114 | shdr_size = elfcpp::Elf_sizes<64>::shdr_size; | |
115 | else | |
a3ad94ed | 116 | gold_unreachable(); |
75f65a3e ILT |
117 | |
118 | this->set_data_size(count * shdr_size); | |
119 | } | |
120 | ||
61ba1cf9 ILT |
121 | // Write out the section headers. |
122 | ||
75f65a3e | 123 | void |
61ba1cf9 | 124 | Output_section_headers::do_write(Output_file* of) |
a2fb1b05 | 125 | { |
9025d29d | 126 | if (parameters->get_size() == 32) |
61ba1cf9 | 127 | { |
9025d29d ILT |
128 | if (parameters->is_big_endian()) |
129 | { | |
130 | #ifdef HAVE_TARGET_32_BIG | |
131 | this->do_sized_write<32, true>(of); | |
132 | #else | |
133 | gold_unreachable(); | |
134 | #endif | |
135 | } | |
61ba1cf9 | 136 | else |
9025d29d ILT |
137 | { |
138 | #ifdef HAVE_TARGET_32_LITTLE | |
139 | this->do_sized_write<32, false>(of); | |
140 | #else | |
141 | gold_unreachable(); | |
142 | #endif | |
143 | } | |
61ba1cf9 | 144 | } |
9025d29d | 145 | else if (parameters->get_size() == 64) |
61ba1cf9 | 146 | { |
9025d29d ILT |
147 | if (parameters->is_big_endian()) |
148 | { | |
149 | #ifdef HAVE_TARGET_64_BIG | |
150 | this->do_sized_write<64, true>(of); | |
151 | #else | |
152 | gold_unreachable(); | |
153 | #endif | |
154 | } | |
61ba1cf9 | 155 | else |
9025d29d ILT |
156 | { |
157 | #ifdef HAVE_TARGET_64_LITTLE | |
158 | this->do_sized_write<64, false>(of); | |
159 | #else | |
160 | gold_unreachable(); | |
161 | #endif | |
162 | } | |
61ba1cf9 ILT |
163 | } |
164 | else | |
a3ad94ed | 165 | gold_unreachable(); |
61ba1cf9 ILT |
166 | } |
167 | ||
168 | template<int size, bool big_endian> | |
169 | void | |
170 | Output_section_headers::do_sized_write(Output_file* of) | |
171 | { | |
172 | off_t all_shdrs_size = this->data_size(); | |
173 | unsigned char* view = of->get_output_view(this->offset(), all_shdrs_size); | |
174 | ||
175 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
176 | unsigned char* v = view; | |
177 | ||
178 | { | |
179 | typename elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
180 | oshdr.put_sh_name(0); | |
181 | oshdr.put_sh_type(elfcpp::SHT_NULL); | |
182 | oshdr.put_sh_flags(0); | |
183 | oshdr.put_sh_addr(0); | |
184 | oshdr.put_sh_offset(0); | |
185 | oshdr.put_sh_size(0); | |
186 | oshdr.put_sh_link(0); | |
187 | oshdr.put_sh_info(0); | |
188 | oshdr.put_sh_addralign(0); | |
189 | oshdr.put_sh_entsize(0); | |
190 | } | |
191 | ||
192 | v += shdr_size; | |
193 | ||
ead1e424 | 194 | unsigned shndx = 1; |
16649710 ILT |
195 | for (Layout::Segment_list::const_iterator p = this->segment_list_->begin(); |
196 | p != this->segment_list_->end(); | |
61ba1cf9 | 197 | ++p) |
593f47df | 198 | v = (*p)->write_section_headers SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( |
16649710 | 199 | this->layout_, this->secnamepool_, v, &shndx |
ead1e424 | 200 | SELECT_SIZE_ENDIAN(size, big_endian)); |
a3ad94ed | 201 | for (Layout::Section_list::const_iterator p = |
16649710 ILT |
202 | this->unattached_section_list_->begin(); |
203 | p != this->unattached_section_list_->end(); | |
61ba1cf9 ILT |
204 | ++p) |
205 | { | |
a3ad94ed | 206 | gold_assert(shndx == (*p)->out_shndx()); |
61ba1cf9 | 207 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 208 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); |
61ba1cf9 | 209 | v += shdr_size; |
ead1e424 | 210 | ++shndx; |
61ba1cf9 ILT |
211 | } |
212 | ||
213 | of->write_output_view(this->offset(), all_shdrs_size, view); | |
a2fb1b05 ILT |
214 | } |
215 | ||
54dc6425 ILT |
216 | // Output_segment_header methods. |
217 | ||
61ba1cf9 | 218 | Output_segment_headers::Output_segment_headers( |
61ba1cf9 | 219 | const Layout::Segment_list& segment_list) |
9025d29d | 220 | : segment_list_(segment_list) |
61ba1cf9 | 221 | { |
9025d29d | 222 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
223 | int phdr_size; |
224 | if (size == 32) | |
225 | phdr_size = elfcpp::Elf_sizes<32>::phdr_size; | |
226 | else if (size == 64) | |
227 | phdr_size = elfcpp::Elf_sizes<64>::phdr_size; | |
228 | else | |
a3ad94ed | 229 | gold_unreachable(); |
61ba1cf9 ILT |
230 | |
231 | this->set_data_size(segment_list.size() * phdr_size); | |
232 | } | |
233 | ||
54dc6425 | 234 | void |
61ba1cf9 | 235 | Output_segment_headers::do_write(Output_file* of) |
75f65a3e | 236 | { |
9025d29d | 237 | if (parameters->get_size() == 32) |
61ba1cf9 | 238 | { |
9025d29d ILT |
239 | if (parameters->is_big_endian()) |
240 | { | |
241 | #ifdef HAVE_TARGET_32_BIG | |
242 | this->do_sized_write<32, true>(of); | |
243 | #else | |
244 | gold_unreachable(); | |
245 | #endif | |
246 | } | |
61ba1cf9 | 247 | else |
9025d29d ILT |
248 | { |
249 | #ifdef HAVE_TARGET_32_LITTLE | |
61ba1cf9 | 250 | this->do_sized_write<32, false>(of); |
9025d29d ILT |
251 | #else |
252 | gold_unreachable(); | |
253 | #endif | |
254 | } | |
61ba1cf9 | 255 | } |
9025d29d | 256 | else if (parameters->get_size() == 64) |
61ba1cf9 | 257 | { |
9025d29d ILT |
258 | if (parameters->is_big_endian()) |
259 | { | |
260 | #ifdef HAVE_TARGET_64_BIG | |
261 | this->do_sized_write<64, true>(of); | |
262 | #else | |
263 | gold_unreachable(); | |
264 | #endif | |
265 | } | |
61ba1cf9 | 266 | else |
9025d29d ILT |
267 | { |
268 | #ifdef HAVE_TARGET_64_LITTLE | |
269 | this->do_sized_write<64, false>(of); | |
270 | #else | |
271 | gold_unreachable(); | |
272 | #endif | |
273 | } | |
61ba1cf9 ILT |
274 | } |
275 | else | |
a3ad94ed | 276 | gold_unreachable(); |
61ba1cf9 ILT |
277 | } |
278 | ||
279 | template<int size, bool big_endian> | |
280 | void | |
281 | Output_segment_headers::do_sized_write(Output_file* of) | |
282 | { | |
283 | const int phdr_size = elfcpp::Elf_sizes<size>::phdr_size; | |
284 | off_t all_phdrs_size = this->segment_list_.size() * phdr_size; | |
285 | unsigned char* view = of->get_output_view(this->offset(), | |
286 | all_phdrs_size); | |
287 | unsigned char* v = view; | |
288 | for (Layout::Segment_list::const_iterator p = this->segment_list_.begin(); | |
289 | p != this->segment_list_.end(); | |
290 | ++p) | |
291 | { | |
292 | elfcpp::Phdr_write<size, big_endian> ophdr(v); | |
293 | (*p)->write_header(&ophdr); | |
294 | v += phdr_size; | |
295 | } | |
296 | ||
297 | of->write_output_view(this->offset(), all_phdrs_size, view); | |
75f65a3e ILT |
298 | } |
299 | ||
300 | // Output_file_header methods. | |
301 | ||
9025d29d | 302 | Output_file_header::Output_file_header(const Target* target, |
75f65a3e ILT |
303 | const Symbol_table* symtab, |
304 | const Output_segment_headers* osh) | |
9025d29d | 305 | : target_(target), |
75f65a3e | 306 | symtab_(symtab), |
61ba1cf9 | 307 | segment_header_(osh), |
75f65a3e ILT |
308 | section_header_(NULL), |
309 | shstrtab_(NULL) | |
310 | { | |
9025d29d | 311 | const int size = parameters->get_size(); |
61ba1cf9 ILT |
312 | int ehdr_size; |
313 | if (size == 32) | |
314 | ehdr_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
315 | else if (size == 64) | |
316 | ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
317 | else | |
a3ad94ed | 318 | gold_unreachable(); |
61ba1cf9 ILT |
319 | |
320 | this->set_data_size(ehdr_size); | |
75f65a3e ILT |
321 | } |
322 | ||
323 | // Set the section table information for a file header. | |
324 | ||
325 | void | |
326 | Output_file_header::set_section_info(const Output_section_headers* shdrs, | |
327 | const Output_section* shstrtab) | |
328 | { | |
329 | this->section_header_ = shdrs; | |
330 | this->shstrtab_ = shstrtab; | |
331 | } | |
332 | ||
333 | // Write out the file header. | |
334 | ||
335 | void | |
61ba1cf9 | 336 | Output_file_header::do_write(Output_file* of) |
54dc6425 | 337 | { |
9025d29d | 338 | if (parameters->get_size() == 32) |
61ba1cf9 | 339 | { |
9025d29d ILT |
340 | if (parameters->is_big_endian()) |
341 | { | |
342 | #ifdef HAVE_TARGET_32_BIG | |
343 | this->do_sized_write<32, true>(of); | |
344 | #else | |
345 | gold_unreachable(); | |
346 | #endif | |
347 | } | |
61ba1cf9 | 348 | else |
9025d29d ILT |
349 | { |
350 | #ifdef HAVE_TARGET_32_LITTLE | |
351 | this->do_sized_write<32, false>(of); | |
352 | #else | |
353 | gold_unreachable(); | |
354 | #endif | |
355 | } | |
61ba1cf9 | 356 | } |
9025d29d | 357 | else if (parameters->get_size() == 64) |
61ba1cf9 | 358 | { |
9025d29d ILT |
359 | if (parameters->is_big_endian()) |
360 | { | |
361 | #ifdef HAVE_TARGET_64_BIG | |
362 | this->do_sized_write<64, true>(of); | |
363 | #else | |
364 | gold_unreachable(); | |
365 | #endif | |
366 | } | |
61ba1cf9 | 367 | else |
9025d29d ILT |
368 | { |
369 | #ifdef HAVE_TARGET_64_LITTLE | |
370 | this->do_sized_write<64, false>(of); | |
371 | #else | |
372 | gold_unreachable(); | |
373 | #endif | |
374 | } | |
61ba1cf9 ILT |
375 | } |
376 | else | |
a3ad94ed | 377 | gold_unreachable(); |
61ba1cf9 ILT |
378 | } |
379 | ||
380 | // Write out the file header with appropriate size and endianess. | |
381 | ||
382 | template<int size, bool big_endian> | |
383 | void | |
384 | Output_file_header::do_sized_write(Output_file* of) | |
385 | { | |
a3ad94ed | 386 | gold_assert(this->offset() == 0); |
61ba1cf9 ILT |
387 | |
388 | int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; | |
389 | unsigned char* view = of->get_output_view(0, ehdr_size); | |
390 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); | |
391 | ||
392 | unsigned char e_ident[elfcpp::EI_NIDENT]; | |
393 | memset(e_ident, 0, elfcpp::EI_NIDENT); | |
394 | e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0; | |
395 | e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1; | |
396 | e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2; | |
397 | e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3; | |
398 | if (size == 32) | |
399 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32; | |
400 | else if (size == 64) | |
401 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64; | |
402 | else | |
a3ad94ed | 403 | gold_unreachable(); |
61ba1cf9 ILT |
404 | e_ident[elfcpp::EI_DATA] = (big_endian |
405 | ? elfcpp::ELFDATA2MSB | |
406 | : elfcpp::ELFDATA2LSB); | |
407 | e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; | |
408 | // FIXME: Some targets may need to set EI_OSABI and EI_ABIVERSION. | |
409 | oehdr.put_e_ident(e_ident); | |
410 | ||
411 | elfcpp::ET e_type; | |
7e1edb90 | 412 | if (parameters->output_is_object()) |
61ba1cf9 | 413 | e_type = elfcpp::ET_REL; |
436ca963 ILT |
414 | else if (parameters->output_is_shared()) |
415 | e_type = elfcpp::ET_DYN; | |
61ba1cf9 ILT |
416 | else |
417 | e_type = elfcpp::ET_EXEC; | |
418 | oehdr.put_e_type(e_type); | |
419 | ||
420 | oehdr.put_e_machine(this->target_->machine_code()); | |
421 | oehdr.put_e_version(elfcpp::EV_CURRENT); | |
422 | ||
ead1e424 | 423 | // FIXME: Need to support -e, and target specific entry symbol. |
61ba1cf9 ILT |
424 | Symbol* sym = this->symtab_->lookup("_start"); |
425 | typename Sized_symbol<size>::Value_type v; | |
426 | if (sym == NULL) | |
427 | v = 0; | |
428 | else | |
429 | { | |
430 | Sized_symbol<size>* ssym; | |
593f47df | 431 | ssym = this->symtab_->get_sized_symbol SELECT_SIZE_NAME(size) ( |
5482377d | 432 | sym SELECT_SIZE(size)); |
61ba1cf9 ILT |
433 | v = ssym->value(); |
434 | } | |
435 | oehdr.put_e_entry(v); | |
436 | ||
437 | oehdr.put_e_phoff(this->segment_header_->offset()); | |
438 | oehdr.put_e_shoff(this->section_header_->offset()); | |
439 | ||
440 | // FIXME: The target needs to set the flags. | |
441 | oehdr.put_e_flags(0); | |
442 | ||
443 | oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size); | |
444 | oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size); | |
445 | oehdr.put_e_phnum(this->segment_header_->data_size() | |
446 | / elfcpp::Elf_sizes<size>::phdr_size); | |
447 | oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size); | |
448 | oehdr.put_e_shnum(this->section_header_->data_size() | |
449 | / elfcpp::Elf_sizes<size>::shdr_size); | |
ead1e424 | 450 | oehdr.put_e_shstrndx(this->shstrtab_->out_shndx()); |
61ba1cf9 ILT |
451 | |
452 | of->write_output_view(0, ehdr_size, view); | |
54dc6425 ILT |
453 | } |
454 | ||
dbe717ef ILT |
455 | // Output_data_const methods. |
456 | ||
457 | void | |
a3ad94ed | 458 | Output_data_const::do_write(Output_file* of) |
dbe717ef | 459 | { |
a3ad94ed ILT |
460 | of->write(this->offset(), this->data_.data(), this->data_.size()); |
461 | } | |
462 | ||
463 | // Output_data_const_buffer methods. | |
464 | ||
465 | void | |
466 | Output_data_const_buffer::do_write(Output_file* of) | |
467 | { | |
468 | of->write(this->offset(), this->p_, this->data_size()); | |
dbe717ef ILT |
469 | } |
470 | ||
471 | // Output_section_data methods. | |
472 | ||
16649710 ILT |
473 | // Record the output section, and set the entry size and such. |
474 | ||
475 | void | |
476 | Output_section_data::set_output_section(Output_section* os) | |
477 | { | |
478 | gold_assert(this->output_section_ == NULL); | |
479 | this->output_section_ = os; | |
480 | this->do_adjust_output_section(os); | |
481 | } | |
482 | ||
483 | // Return the section index of the output section. | |
484 | ||
dbe717ef ILT |
485 | unsigned int |
486 | Output_section_data::do_out_shndx() const | |
487 | { | |
a3ad94ed | 488 | gold_assert(this->output_section_ != NULL); |
dbe717ef ILT |
489 | return this->output_section_->out_shndx(); |
490 | } | |
491 | ||
a3ad94ed ILT |
492 | // Output_data_strtab methods. |
493 | ||
494 | // Set the address. We don't actually care about the address, but we | |
495 | // do set our final size. | |
496 | ||
497 | void | |
498 | Output_data_strtab::do_set_address(uint64_t, off_t) | |
499 | { | |
500 | this->strtab_->set_string_offsets(); | |
501 | this->set_data_size(this->strtab_->get_strtab_size()); | |
502 | } | |
503 | ||
504 | // Write out a string table. | |
505 | ||
506 | void | |
507 | Output_data_strtab::do_write(Output_file* of) | |
508 | { | |
509 | this->strtab_->write(of, this->offset()); | |
510 | } | |
511 | ||
c06b7b0b ILT |
512 | // Output_reloc methods. |
513 | ||
514 | // Get the symbol index of a relocation. | |
515 | ||
516 | template<bool dynamic, int size, bool big_endian> | |
517 | unsigned int | |
518 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index() | |
519 | const | |
520 | { | |
521 | unsigned int index; | |
522 | switch (this->local_sym_index_) | |
523 | { | |
524 | case INVALID_CODE: | |
a3ad94ed | 525 | gold_unreachable(); |
c06b7b0b ILT |
526 | |
527 | case GSYM_CODE: | |
5a6f7e2d | 528 | if (this->u1_.gsym == NULL) |
c06b7b0b ILT |
529 | index = 0; |
530 | else if (dynamic) | |
5a6f7e2d | 531 | index = this->u1_.gsym->dynsym_index(); |
c06b7b0b | 532 | else |
5a6f7e2d | 533 | index = this->u1_.gsym->symtab_index(); |
c06b7b0b ILT |
534 | break; |
535 | ||
536 | case SECTION_CODE: | |
537 | if (dynamic) | |
5a6f7e2d | 538 | index = this->u1_.os->dynsym_index(); |
c06b7b0b | 539 | else |
5a6f7e2d | 540 | index = this->u1_.os->symtab_index(); |
c06b7b0b ILT |
541 | break; |
542 | ||
436ca963 ILT |
543 | case 0: |
544 | // Relocations without symbols use a symbol index of 0. | |
545 | index = 0; | |
546 | break; | |
547 | ||
c06b7b0b ILT |
548 | default: |
549 | if (dynamic) | |
550 | { | |
551 | // FIXME: It seems that some targets may need to generate | |
552 | // dynamic relocations against local symbols for some | |
553 | // reasons. This will have to be addressed at some point. | |
a3ad94ed | 554 | gold_unreachable(); |
c06b7b0b ILT |
555 | } |
556 | else | |
5a6f7e2d | 557 | index = this->u1_.relobj->symtab_index(this->local_sym_index_); |
c06b7b0b ILT |
558 | break; |
559 | } | |
a3ad94ed | 560 | gold_assert(index != -1U); |
c06b7b0b ILT |
561 | return index; |
562 | } | |
563 | ||
564 | // Write out the offset and info fields of a Rel or Rela relocation | |
565 | // entry. | |
566 | ||
567 | template<bool dynamic, int size, bool big_endian> | |
568 | template<typename Write_rel> | |
569 | void | |
570 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel( | |
571 | Write_rel* wr) const | |
572 | { | |
a3ad94ed | 573 | Address address = this->address_; |
5a6f7e2d ILT |
574 | if (this->shndx_ != INVALID_CODE) |
575 | { | |
576 | off_t off; | |
577 | Output_section* os = this->u2_.relobj->output_section(this->shndx_, | |
578 | &off); | |
579 | gold_assert(os != NULL); | |
730cdc88 ILT |
580 | if (off != -1) |
581 | address += os->address() + off; | |
582 | else | |
583 | { | |
584 | address = os->output_address(this->u2_.relobj, this->shndx_, | |
585 | address); | |
586 | gold_assert(address != -1U); | |
587 | } | |
5a6f7e2d ILT |
588 | } |
589 | else if (this->u2_.od != NULL) | |
590 | address += this->u2_.od->address(); | |
a3ad94ed | 591 | wr->put_r_offset(address); |
c06b7b0b ILT |
592 | wr->put_r_info(elfcpp::elf_r_info<size>(this->get_symbol_index(), |
593 | this->type_)); | |
594 | } | |
595 | ||
596 | // Write out a Rel relocation. | |
597 | ||
598 | template<bool dynamic, int size, bool big_endian> | |
599 | void | |
600 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write( | |
601 | unsigned char* pov) const | |
602 | { | |
603 | elfcpp::Rel_write<size, big_endian> orel(pov); | |
604 | this->write_rel(&orel); | |
605 | } | |
606 | ||
607 | // Write out a Rela relocation. | |
608 | ||
609 | template<bool dynamic, int size, bool big_endian> | |
610 | void | |
611 | Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write( | |
612 | unsigned char* pov) const | |
613 | { | |
614 | elfcpp::Rela_write<size, big_endian> orel(pov); | |
615 | this->rel_.write_rel(&orel); | |
616 | orel.put_r_addend(this->addend_); | |
617 | } | |
618 | ||
619 | // Output_data_reloc_base methods. | |
620 | ||
16649710 ILT |
621 | // Adjust the output section. |
622 | ||
623 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
624 | void | |
625 | Output_data_reloc_base<sh_type, dynamic, size, big_endian> | |
626 | ::do_adjust_output_section(Output_section* os) | |
627 | { | |
628 | if (sh_type == elfcpp::SHT_REL) | |
629 | os->set_entsize(elfcpp::Elf_sizes<size>::rel_size); | |
630 | else if (sh_type == elfcpp::SHT_RELA) | |
631 | os->set_entsize(elfcpp::Elf_sizes<size>::rela_size); | |
632 | else | |
633 | gold_unreachable(); | |
634 | if (dynamic) | |
635 | os->set_should_link_to_dynsym(); | |
636 | else | |
637 | os->set_should_link_to_symtab(); | |
638 | } | |
639 | ||
c06b7b0b ILT |
640 | // Write out relocation data. |
641 | ||
642 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
643 | void | |
644 | Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write( | |
645 | Output_file* of) | |
646 | { | |
647 | const off_t off = this->offset(); | |
648 | const off_t oview_size = this->data_size(); | |
649 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
650 | ||
651 | unsigned char* pov = oview; | |
652 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
653 | p != this->relocs_.end(); | |
654 | ++p) | |
655 | { | |
656 | p->write(pov); | |
657 | pov += reloc_size; | |
658 | } | |
659 | ||
a3ad94ed | 660 | gold_assert(pov - oview == oview_size); |
c06b7b0b ILT |
661 | |
662 | of->write_output_view(off, oview_size, oview); | |
663 | ||
664 | // We no longer need the relocation entries. | |
665 | this->relocs_.clear(); | |
666 | } | |
667 | ||
dbe717ef | 668 | // Output_data_got::Got_entry methods. |
ead1e424 ILT |
669 | |
670 | // Write out the entry. | |
671 | ||
672 | template<int size, bool big_endian> | |
673 | void | |
7e1edb90 | 674 | Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const |
ead1e424 ILT |
675 | { |
676 | Valtype val = 0; | |
677 | ||
678 | switch (this->local_sym_index_) | |
679 | { | |
680 | case GSYM_CODE: | |
681 | { | |
682 | Symbol* gsym = this->u_.gsym; | |
683 | ||
684 | // If the symbol is resolved locally, we need to write out its | |
685 | // value. Otherwise we just write zero. The target code is | |
686 | // responsible for creating a relocation entry to fill in the | |
d61c6bd4 ILT |
687 | // value at runtime. For non-preemptible symbols in a shared |
688 | // library, the target will need to record whether or not the | |
689 | // value should be written (e.g., it may use a RELATIVE | |
690 | // relocation type). | |
691 | if (gsym->final_value_is_known() || gsym->needs_value_in_got()) | |
ead1e424 ILT |
692 | { |
693 | Sized_symbol<size>* sgsym; | |
694 | // This cast is a bit ugly. We don't want to put a | |
695 | // virtual method in Symbol, because we want Symbol to be | |
696 | // as small as possible. | |
697 | sgsym = static_cast<Sized_symbol<size>*>(gsym); | |
698 | val = sgsym->value(); | |
699 | } | |
700 | } | |
701 | break; | |
702 | ||
703 | case CONSTANT_CODE: | |
704 | val = this->u_.constant; | |
705 | break; | |
706 | ||
707 | default: | |
e727fa71 ILT |
708 | val = this->u_.object->local_symbol_value(this->local_sym_index_); |
709 | break; | |
ead1e424 ILT |
710 | } |
711 | ||
a3ad94ed | 712 | elfcpp::Swap<size, big_endian>::writeval(pov, val); |
ead1e424 ILT |
713 | } |
714 | ||
dbe717ef | 715 | // Output_data_got methods. |
ead1e424 | 716 | |
dbe717ef ILT |
717 | // Add an entry for a global symbol to the GOT. This returns true if |
718 | // this is a new GOT entry, false if the symbol already had a GOT | |
719 | // entry. | |
720 | ||
721 | template<int size, bool big_endian> | |
722 | bool | |
723 | Output_data_got<size, big_endian>::add_global(Symbol* gsym) | |
ead1e424 | 724 | { |
dbe717ef ILT |
725 | if (gsym->has_got_offset()) |
726 | return false; | |
ead1e424 | 727 | |
dbe717ef ILT |
728 | this->entries_.push_back(Got_entry(gsym)); |
729 | this->set_got_size(); | |
730 | gsym->set_got_offset(this->last_got_offset()); | |
731 | return true; | |
732 | } | |
ead1e424 | 733 | |
e727fa71 ILT |
734 | // Add an entry for a local symbol to the GOT. This returns true if |
735 | // this is a new GOT entry, false if the symbol already has a GOT | |
736 | // entry. | |
737 | ||
738 | template<int size, bool big_endian> | |
739 | bool | |
740 | Output_data_got<size, big_endian>::add_local( | |
741 | Sized_relobj<size, big_endian>* object, | |
742 | unsigned int symndx) | |
743 | { | |
744 | if (object->local_has_got_offset(symndx)) | |
745 | return false; | |
07f397ab | 746 | |
e727fa71 ILT |
747 | this->entries_.push_back(Got_entry(object, symndx)); |
748 | this->set_got_size(); | |
749 | object->set_local_got_offset(symndx, this->last_got_offset()); | |
750 | return true; | |
751 | } | |
752 | ||
07f397ab ILT |
753 | // Add an entry (or a pair of entries) for a global TLS symbol to the GOT. |
754 | // In a pair of entries, the first value in the pair will be used for the | |
755 | // module index, and the second value will be used for the dtv-relative | |
756 | // offset. This returns true if this is a new GOT entry, false if the symbol | |
757 | // already has a GOT entry. | |
758 | ||
759 | template<int size, bool big_endian> | |
760 | bool | |
761 | Output_data_got<size, big_endian>::add_global_tls(Symbol* gsym, | |
762 | bool need_pair) | |
763 | { | |
764 | if (gsym->has_tls_got_offset(need_pair)) | |
765 | return false; | |
766 | ||
767 | this->entries_.push_back(Got_entry(gsym)); | |
768 | gsym->set_tls_got_offset(this->last_got_offset(), need_pair); | |
769 | if (need_pair) | |
770 | this->entries_.push_back(Got_entry(gsym)); | |
771 | this->set_got_size(); | |
772 | return true; | |
773 | } | |
774 | ||
775 | // Add an entry (or a pair of entries) for a local TLS symbol to the GOT. | |
776 | // In a pair of entries, the first value in the pair will be used for the | |
777 | // module index, and the second value will be used for the dtv-relative | |
778 | // offset. This returns true if this is a new GOT entry, false if the symbol | |
779 | // already has a GOT entry. | |
780 | ||
781 | template<int size, bool big_endian> | |
782 | bool | |
783 | Output_data_got<size, big_endian>::add_local_tls( | |
784 | Sized_relobj<size, big_endian>* object, | |
785 | unsigned int symndx, | |
786 | bool need_pair) | |
787 | { | |
788 | if (object->local_has_tls_got_offset(symndx, need_pair)) | |
789 | return false; | |
790 | ||
791 | this->entries_.push_back(Got_entry(object, symndx)); | |
792 | object->set_local_tls_got_offset(symndx, this->last_got_offset(), need_pair); | |
793 | if (need_pair) | |
794 | this->entries_.push_back(Got_entry(object, symndx)); | |
795 | this->set_got_size(); | |
796 | return true; | |
797 | } | |
798 | ||
ead1e424 ILT |
799 | // Write out the GOT. |
800 | ||
801 | template<int size, bool big_endian> | |
802 | void | |
dbe717ef | 803 | Output_data_got<size, big_endian>::do_write(Output_file* of) |
ead1e424 ILT |
804 | { |
805 | const int add = size / 8; | |
806 | ||
807 | const off_t off = this->offset(); | |
c06b7b0b | 808 | const off_t oview_size = this->data_size(); |
ead1e424 ILT |
809 | unsigned char* const oview = of->get_output_view(off, oview_size); |
810 | ||
811 | unsigned char* pov = oview; | |
812 | for (typename Got_entries::const_iterator p = this->entries_.begin(); | |
813 | p != this->entries_.end(); | |
814 | ++p) | |
815 | { | |
7e1edb90 | 816 | p->write(pov); |
ead1e424 ILT |
817 | pov += add; |
818 | } | |
819 | ||
a3ad94ed | 820 | gold_assert(pov - oview == oview_size); |
c06b7b0b | 821 | |
ead1e424 ILT |
822 | of->write_output_view(off, oview_size, oview); |
823 | ||
824 | // We no longer need the GOT entries. | |
825 | this->entries_.clear(); | |
826 | } | |
827 | ||
a3ad94ed ILT |
828 | // Output_data_dynamic::Dynamic_entry methods. |
829 | ||
830 | // Write out the entry. | |
831 | ||
832 | template<int size, bool big_endian> | |
833 | void | |
834 | Output_data_dynamic::Dynamic_entry::write( | |
835 | unsigned char* pov, | |
1ddbd1e6 ILT |
836 | const Stringpool* pool |
837 | ACCEPT_SIZE_ENDIAN) const | |
a3ad94ed ILT |
838 | { |
839 | typename elfcpp::Elf_types<size>::Elf_WXword val; | |
840 | switch (this->classification_) | |
841 | { | |
842 | case DYNAMIC_NUMBER: | |
843 | val = this->u_.val; | |
844 | break; | |
845 | ||
846 | case DYNAMIC_SECTION_ADDRESS: | |
16649710 | 847 | val = this->u_.od->address(); |
a3ad94ed ILT |
848 | break; |
849 | ||
850 | case DYNAMIC_SECTION_SIZE: | |
16649710 | 851 | val = this->u_.od->data_size(); |
a3ad94ed ILT |
852 | break; |
853 | ||
854 | case DYNAMIC_SYMBOL: | |
855 | { | |
16649710 ILT |
856 | const Sized_symbol<size>* s = |
857 | static_cast<const Sized_symbol<size>*>(this->u_.sym); | |
a3ad94ed ILT |
858 | val = s->value(); |
859 | } | |
860 | break; | |
861 | ||
862 | case DYNAMIC_STRING: | |
863 | val = pool->get_offset(this->u_.str); | |
864 | break; | |
865 | ||
866 | default: | |
867 | gold_unreachable(); | |
868 | } | |
869 | ||
870 | elfcpp::Dyn_write<size, big_endian> dw(pov); | |
871 | dw.put_d_tag(this->tag_); | |
872 | dw.put_d_val(val); | |
873 | } | |
874 | ||
875 | // Output_data_dynamic methods. | |
876 | ||
16649710 ILT |
877 | // Adjust the output section to set the entry size. |
878 | ||
879 | void | |
880 | Output_data_dynamic::do_adjust_output_section(Output_section* os) | |
881 | { | |
9025d29d | 882 | if (parameters->get_size() == 32) |
16649710 | 883 | os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size); |
9025d29d | 884 | else if (parameters->get_size() == 64) |
16649710 ILT |
885 | os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size); |
886 | else | |
887 | gold_unreachable(); | |
888 | } | |
889 | ||
a3ad94ed ILT |
890 | // Set the final data size. |
891 | ||
892 | void | |
893 | Output_data_dynamic::do_set_address(uint64_t, off_t) | |
894 | { | |
895 | // Add the terminating entry. | |
896 | this->add_constant(elfcpp::DT_NULL, 0); | |
897 | ||
898 | int dyn_size; | |
9025d29d | 899 | if (parameters->get_size() == 32) |
a3ad94ed | 900 | dyn_size = elfcpp::Elf_sizes<32>::dyn_size; |
9025d29d | 901 | else if (parameters->get_size() == 64) |
a3ad94ed ILT |
902 | dyn_size = elfcpp::Elf_sizes<64>::dyn_size; |
903 | else | |
904 | gold_unreachable(); | |
905 | this->set_data_size(this->entries_.size() * dyn_size); | |
906 | } | |
907 | ||
908 | // Write out the dynamic entries. | |
909 | ||
910 | void | |
911 | Output_data_dynamic::do_write(Output_file* of) | |
912 | { | |
9025d29d | 913 | if (parameters->get_size() == 32) |
a3ad94ed | 914 | { |
9025d29d ILT |
915 | if (parameters->is_big_endian()) |
916 | { | |
917 | #ifdef HAVE_TARGET_32_BIG | |
918 | this->sized_write<32, true>(of); | |
919 | #else | |
920 | gold_unreachable(); | |
921 | #endif | |
922 | } | |
a3ad94ed | 923 | else |
9025d29d ILT |
924 | { |
925 | #ifdef HAVE_TARGET_32_LITTLE | |
926 | this->sized_write<32, false>(of); | |
927 | #else | |
928 | gold_unreachable(); | |
929 | #endif | |
930 | } | |
a3ad94ed | 931 | } |
9025d29d | 932 | else if (parameters->get_size() == 64) |
a3ad94ed | 933 | { |
9025d29d ILT |
934 | if (parameters->is_big_endian()) |
935 | { | |
936 | #ifdef HAVE_TARGET_64_BIG | |
937 | this->sized_write<64, true>(of); | |
938 | #else | |
939 | gold_unreachable(); | |
940 | #endif | |
941 | } | |
a3ad94ed | 942 | else |
9025d29d ILT |
943 | { |
944 | #ifdef HAVE_TARGET_64_LITTLE | |
945 | this->sized_write<64, false>(of); | |
946 | #else | |
947 | gold_unreachable(); | |
948 | #endif | |
949 | } | |
a3ad94ed ILT |
950 | } |
951 | else | |
952 | gold_unreachable(); | |
953 | } | |
954 | ||
955 | template<int size, bool big_endian> | |
956 | void | |
957 | Output_data_dynamic::sized_write(Output_file* of) | |
958 | { | |
959 | const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
960 | ||
961 | const off_t offset = this->offset(); | |
962 | const off_t oview_size = this->data_size(); | |
963 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
964 | ||
965 | unsigned char* pov = oview; | |
966 | for (typename Dynamic_entries::const_iterator p = this->entries_.begin(); | |
967 | p != this->entries_.end(); | |
968 | ++p) | |
969 | { | |
1ddbd1e6 ILT |
970 | p->write SELECT_SIZE_ENDIAN_NAME(size, big_endian)( |
971 | pov, this->pool_ SELECT_SIZE_ENDIAN(size, big_endian)); | |
a3ad94ed ILT |
972 | pov += dyn_size; |
973 | } | |
974 | ||
975 | gold_assert(pov - oview == oview_size); | |
976 | ||
977 | of->write_output_view(offset, oview_size, oview); | |
978 | ||
979 | // We no longer need the dynamic entries. | |
980 | this->entries_.clear(); | |
981 | } | |
982 | ||
ead1e424 ILT |
983 | // Output_section::Input_section methods. |
984 | ||
985 | // Return the data size. For an input section we store the size here. | |
986 | // For an Output_section_data, we have to ask it for the size. | |
987 | ||
988 | off_t | |
989 | Output_section::Input_section::data_size() const | |
990 | { | |
991 | if (this->is_input_section()) | |
b8e6aad9 | 992 | return this->u1_.data_size; |
ead1e424 | 993 | else |
b8e6aad9 | 994 | return this->u2_.posd->data_size(); |
ead1e424 ILT |
995 | } |
996 | ||
997 | // Set the address and file offset. | |
998 | ||
999 | void | |
1000 | Output_section::Input_section::set_address(uint64_t addr, off_t off, | |
1001 | off_t secoff) | |
1002 | { | |
1003 | if (this->is_input_section()) | |
b8e6aad9 | 1004 | this->u2_.object->set_section_offset(this->shndx_, off - secoff); |
ead1e424 | 1005 | else |
b8e6aad9 ILT |
1006 | this->u2_.posd->set_address(addr, off); |
1007 | } | |
1008 | ||
730cdc88 | 1009 | // Try to turn an input offset into an output offset. |
b8e6aad9 ILT |
1010 | |
1011 | bool | |
730cdc88 ILT |
1012 | Output_section::Input_section::output_offset(const Relobj* object, |
1013 | unsigned int shndx, | |
1014 | off_t offset, | |
1015 | off_t *poutput) const | |
b8e6aad9 ILT |
1016 | { |
1017 | if (!this->is_input_section()) | |
730cdc88 | 1018 | return this->u2_.posd->output_offset(object, shndx, offset, poutput); |
b8e6aad9 ILT |
1019 | else |
1020 | { | |
730cdc88 | 1021 | if (this->shndx_ != shndx || this->u2_.object != object) |
b8e6aad9 ILT |
1022 | return false; |
1023 | off_t output_offset; | |
1024 | Output_section* os = object->output_section(shndx, &output_offset); | |
1025 | gold_assert(os != NULL); | |
730cdc88 ILT |
1026 | gold_assert(output_offset != -1); |
1027 | *poutput = output_offset + offset; | |
b8e6aad9 ILT |
1028 | return true; |
1029 | } | |
ead1e424 ILT |
1030 | } |
1031 | ||
1032 | // Write out the data. We don't have to do anything for an input | |
1033 | // section--they are handled via Object::relocate--but this is where | |
1034 | // we write out the data for an Output_section_data. | |
1035 | ||
1036 | void | |
1037 | Output_section::Input_section::write(Output_file* of) | |
1038 | { | |
1039 | if (!this->is_input_section()) | |
b8e6aad9 | 1040 | this->u2_.posd->write(of); |
ead1e424 ILT |
1041 | } |
1042 | ||
a2fb1b05 ILT |
1043 | // Output_section methods. |
1044 | ||
1045 | // Construct an Output_section. NAME will point into a Stringpool. | |
1046 | ||
1047 | Output_section::Output_section(const char* name, elfcpp::Elf_Word type, | |
b8e6aad9 | 1048 | elfcpp::Elf_Xword flags) |
a2fb1b05 | 1049 | : name_(name), |
a2fb1b05 ILT |
1050 | addralign_(0), |
1051 | entsize_(0), | |
16649710 | 1052 | link_section_(NULL), |
a2fb1b05 | 1053 | link_(0), |
16649710 | 1054 | info_section_(NULL), |
a2fb1b05 ILT |
1055 | info_(0), |
1056 | type_(type), | |
61ba1cf9 | 1057 | flags_(flags), |
91ea499d | 1058 | out_shndx_(-1U), |
c06b7b0b ILT |
1059 | symtab_index_(0), |
1060 | dynsym_index_(0), | |
ead1e424 ILT |
1061 | input_sections_(), |
1062 | first_input_offset_(0), | |
c51e6221 | 1063 | fills_(), |
a3ad94ed | 1064 | needs_symtab_index_(false), |
16649710 ILT |
1065 | needs_dynsym_index_(false), |
1066 | should_link_to_symtab_(false), | |
730cdc88 ILT |
1067 | should_link_to_dynsym_(false), |
1068 | after_input_sections_(false) | |
a2fb1b05 ILT |
1069 | { |
1070 | } | |
1071 | ||
54dc6425 ILT |
1072 | Output_section::~Output_section() |
1073 | { | |
1074 | } | |
1075 | ||
16649710 ILT |
1076 | // Set the entry size. |
1077 | ||
1078 | void | |
1079 | Output_section::set_entsize(uint64_t v) | |
1080 | { | |
1081 | if (this->entsize_ == 0) | |
1082 | this->entsize_ = v; | |
1083 | else | |
1084 | gold_assert(this->entsize_ == v); | |
1085 | } | |
1086 | ||
ead1e424 | 1087 | // Add the input section SHNDX, with header SHDR, named SECNAME, in |
730cdc88 ILT |
1088 | // OBJECT, to the Output_section. RELOC_SHNDX is the index of a |
1089 | // relocation section which applies to this section, or 0 if none, or | |
1090 | // -1U if more than one. Return the offset of the input section | |
1091 | // within the output section. Return -1 if the input section will | |
1092 | // receive special handling. In the normal case we don't always keep | |
1093 | // track of input sections for an Output_section. Instead, each | |
1094 | // Object keeps track of the Output_section for each of its input | |
1095 | // sections. | |
a2fb1b05 ILT |
1096 | |
1097 | template<int size, bool big_endian> | |
1098 | off_t | |
730cdc88 ILT |
1099 | Output_section::add_input_section(Sized_relobj<size, big_endian>* object, |
1100 | unsigned int shndx, | |
ead1e424 | 1101 | const char* secname, |
730cdc88 ILT |
1102 | const elfcpp::Shdr<size, big_endian>& shdr, |
1103 | unsigned int reloc_shndx) | |
a2fb1b05 ILT |
1104 | { |
1105 | elfcpp::Elf_Xword addralign = shdr.get_sh_addralign(); | |
1106 | if ((addralign & (addralign - 1)) != 0) | |
1107 | { | |
75f2446e ILT |
1108 | object->error(_("invalid alignment %lu for section \"%s\""), |
1109 | static_cast<unsigned long>(addralign), secname); | |
1110 | addralign = 1; | |
a2fb1b05 | 1111 | } |
a2fb1b05 ILT |
1112 | |
1113 | if (addralign > this->addralign_) | |
1114 | this->addralign_ = addralign; | |
1115 | ||
44a43cf9 | 1116 | typename elfcpp::Elf_types<size>::Elf_WXword sh_flags = shdr.get_sh_flags(); |
4f833eee | 1117 | uint64_t entsize = shdr.get_sh_entsize(); |
44a43cf9 ILT |
1118 | |
1119 | // .debug_str is a mergeable string section, but is not always so | |
1120 | // marked by compilers. Mark manually here so we can optimize. | |
1121 | if (strcmp(secname, ".debug_str") == 0) | |
4f833eee ILT |
1122 | { |
1123 | sh_flags |= (elfcpp::SHF_MERGE | elfcpp::SHF_STRINGS); | |
1124 | entsize = 1; | |
1125 | } | |
44a43cf9 | 1126 | |
b8e6aad9 | 1127 | // If this is a SHF_MERGE section, we pass all the input sections to |
730cdc88 ILT |
1128 | // a Output_data_merge. We don't try to handle relocations for such |
1129 | // a section. | |
44a43cf9 | 1130 | if ((sh_flags & elfcpp::SHF_MERGE) != 0 |
730cdc88 | 1131 | && reloc_shndx == 0) |
b8e6aad9 | 1132 | { |
44a43cf9 | 1133 | if (this->add_merge_input_section(object, shndx, sh_flags, |
4f833eee | 1134 | entsize, addralign)) |
b8e6aad9 ILT |
1135 | { |
1136 | // Tell the relocation routines that they need to call the | |
730cdc88 | 1137 | // output_offset method to determine the final address. |
b8e6aad9 ILT |
1138 | return -1; |
1139 | } | |
1140 | } | |
1141 | ||
c51e6221 ILT |
1142 | off_t offset_in_section = this->data_size(); |
1143 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
1144 | addralign); | |
1145 | ||
1146 | if (aligned_offset_in_section > offset_in_section | |
44a43cf9 | 1147 | && (sh_flags & elfcpp::SHF_EXECINSTR) != 0 |
c51e6221 ILT |
1148 | && object->target()->has_code_fill()) |
1149 | { | |
1150 | // We need to add some fill data. Using fill_list_ when | |
1151 | // possible is an optimization, since we will often have fill | |
1152 | // sections without input sections. | |
1153 | off_t fill_len = aligned_offset_in_section - offset_in_section; | |
1154 | if (this->input_sections_.empty()) | |
1155 | this->fills_.push_back(Fill(offset_in_section, fill_len)); | |
1156 | else | |
1157 | { | |
1158 | // FIXME: When relaxing, the size needs to adjust to | |
1159 | // maintain a constant alignment. | |
1160 | std::string fill_data(object->target()->code_fill(fill_len)); | |
1161 | Output_data_const* odc = new Output_data_const(fill_data, 1); | |
1162 | this->input_sections_.push_back(Input_section(odc)); | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | this->set_data_size(aligned_offset_in_section + shdr.get_sh_size()); | |
a2fb1b05 | 1167 | |
ead1e424 ILT |
1168 | // We need to keep track of this section if we are already keeping |
1169 | // track of sections, or if we are relaxing. FIXME: Add test for | |
1170 | // relaxing. | |
c51e6221 | 1171 | if (!this->input_sections_.empty()) |
ead1e424 ILT |
1172 | this->input_sections_.push_back(Input_section(object, shndx, |
1173 | shdr.get_sh_size(), | |
1174 | addralign)); | |
54dc6425 | 1175 | |
c51e6221 | 1176 | return aligned_offset_in_section; |
61ba1cf9 ILT |
1177 | } |
1178 | ||
ead1e424 ILT |
1179 | // Add arbitrary data to an output section. |
1180 | ||
1181 | void | |
1182 | Output_section::add_output_section_data(Output_section_data* posd) | |
1183 | { | |
b8e6aad9 ILT |
1184 | Input_section inp(posd); |
1185 | this->add_output_section_data(&inp); | |
1186 | } | |
1187 | ||
1188 | // Add arbitrary data to an output section by Input_section. | |
c06b7b0b | 1189 | |
b8e6aad9 ILT |
1190 | void |
1191 | Output_section::add_output_section_data(Input_section* inp) | |
1192 | { | |
ead1e424 ILT |
1193 | if (this->input_sections_.empty()) |
1194 | this->first_input_offset_ = this->data_size(); | |
c06b7b0b | 1195 | |
b8e6aad9 | 1196 | this->input_sections_.push_back(*inp); |
c06b7b0b | 1197 | |
b8e6aad9 | 1198 | uint64_t addralign = inp->addralign(); |
ead1e424 ILT |
1199 | if (addralign > this->addralign_) |
1200 | this->addralign_ = addralign; | |
c06b7b0b | 1201 | |
b8e6aad9 ILT |
1202 | inp->set_output_section(this); |
1203 | } | |
1204 | ||
1205 | // Add a merge section to an output section. | |
1206 | ||
1207 | void | |
1208 | Output_section::add_output_merge_section(Output_section_data* posd, | |
1209 | bool is_string, uint64_t entsize) | |
1210 | { | |
1211 | Input_section inp(posd, is_string, entsize); | |
1212 | this->add_output_section_data(&inp); | |
1213 | } | |
1214 | ||
1215 | // Add an input section to a SHF_MERGE section. | |
1216 | ||
1217 | bool | |
1218 | Output_section::add_merge_input_section(Relobj* object, unsigned int shndx, | |
1219 | uint64_t flags, uint64_t entsize, | |
1220 | uint64_t addralign) | |
1221 | { | |
87f95776 ILT |
1222 | bool is_string = (flags & elfcpp::SHF_STRINGS) != 0; |
1223 | ||
1224 | // We only merge strings if the alignment is not more than the | |
1225 | // character size. This could be handled, but it's unusual. | |
1226 | if (is_string && addralign > entsize) | |
b8e6aad9 ILT |
1227 | return false; |
1228 | ||
b8e6aad9 ILT |
1229 | Input_section_list::iterator p; |
1230 | for (p = this->input_sections_.begin(); | |
1231 | p != this->input_sections_.end(); | |
1232 | ++p) | |
87f95776 | 1233 | if (p->is_merge_section(is_string, entsize, addralign)) |
b8e6aad9 ILT |
1234 | break; |
1235 | ||
1236 | // We handle the actual constant merging in Output_merge_data or | |
1237 | // Output_merge_string_data. | |
1238 | if (p != this->input_sections_.end()) | |
1239 | p->add_input_section(object, shndx); | |
1240 | else | |
1241 | { | |
1242 | Output_section_data* posd; | |
1243 | if (!is_string) | |
87f95776 | 1244 | posd = new Output_merge_data(entsize, addralign); |
b8e6aad9 | 1245 | else if (entsize == 1) |
87f95776 | 1246 | posd = new Output_merge_string<char>(addralign); |
b8e6aad9 | 1247 | else if (entsize == 2) |
87f95776 | 1248 | posd = new Output_merge_string<uint16_t>(addralign); |
b8e6aad9 | 1249 | else if (entsize == 4) |
87f95776 | 1250 | posd = new Output_merge_string<uint32_t>(addralign); |
b8e6aad9 ILT |
1251 | else |
1252 | return false; | |
1253 | ||
1254 | this->add_output_merge_section(posd, is_string, entsize); | |
1255 | posd->add_input_section(object, shndx); | |
1256 | } | |
1257 | ||
1258 | return true; | |
1259 | } | |
1260 | ||
730cdc88 ILT |
1261 | // Given an address OFFSET relative to the start of input section |
1262 | // SHNDX in OBJECT, return whether this address is being included in | |
1263 | // the final link. This should only be called if SHNDX in OBJECT has | |
1264 | // a special mapping. | |
1265 | ||
1266 | bool | |
1267 | Output_section::is_input_address_mapped(const Relobj* object, | |
1268 | unsigned int shndx, | |
1269 | off_t offset) const | |
1270 | { | |
1271 | gold_assert(object->is_section_specially_mapped(shndx)); | |
1272 | ||
1273 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1274 | p != this->input_sections_.end(); | |
1275 | ++p) | |
1276 | { | |
1277 | off_t output_offset; | |
1278 | if (p->output_offset(object, shndx, offset, &output_offset)) | |
1279 | return output_offset != -1; | |
1280 | } | |
1281 | ||
1282 | // By default we assume that the address is mapped. This should | |
1283 | // only be called after we have passed all sections to Layout. At | |
1284 | // that point we should know what we are discarding. | |
1285 | return true; | |
1286 | } | |
1287 | ||
1288 | // Given an address OFFSET relative to the start of input section | |
1289 | // SHNDX in object OBJECT, return the output offset relative to the | |
1290 | // start of the section. This should only be called if SHNDX in | |
1291 | // OBJECT has a special mapping. | |
1292 | ||
1293 | off_t | |
1294 | Output_section::output_offset(const Relobj* object, unsigned int shndx, | |
1295 | off_t offset) const | |
1296 | { | |
1297 | gold_assert(object->is_section_specially_mapped(shndx)); | |
1298 | // This can only be called meaningfully when layout is complete. | |
1299 | gold_assert(Output_data::is_layout_complete()); | |
1300 | ||
1301 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1302 | p != this->input_sections_.end(); | |
1303 | ++p) | |
1304 | { | |
1305 | off_t output_offset; | |
1306 | if (p->output_offset(object, shndx, offset, &output_offset)) | |
1307 | return output_offset; | |
1308 | } | |
1309 | gold_unreachable(); | |
1310 | } | |
1311 | ||
b8e6aad9 ILT |
1312 | // Return the output virtual address of OFFSET relative to the start |
1313 | // of input section SHNDX in object OBJECT. | |
1314 | ||
1315 | uint64_t | |
1316 | Output_section::output_address(const Relobj* object, unsigned int shndx, | |
1317 | off_t offset) const | |
1318 | { | |
730cdc88 ILT |
1319 | gold_assert(object->is_section_specially_mapped(shndx)); |
1320 | // This can only be called meaningfully when layout is complete. | |
1321 | gold_assert(Output_data::is_layout_complete()); | |
1322 | ||
b8e6aad9 ILT |
1323 | uint64_t addr = this->address() + this->first_input_offset_; |
1324 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1325 | p != this->input_sections_.end(); | |
1326 | ++p) | |
1327 | { | |
1328 | addr = align_address(addr, p->addralign()); | |
730cdc88 ILT |
1329 | off_t output_offset; |
1330 | if (p->output_offset(object, shndx, offset, &output_offset)) | |
1331 | { | |
1332 | if (output_offset == -1) | |
1333 | return -1U; | |
1334 | return addr + output_offset; | |
1335 | } | |
b8e6aad9 ILT |
1336 | addr += p->data_size(); |
1337 | } | |
1338 | ||
1339 | // If we get here, it means that we don't know the mapping for this | |
1340 | // input section. This might happen in principle if | |
1341 | // add_input_section were called before add_output_section_data. | |
1342 | // But it should never actually happen. | |
1343 | ||
1344 | gold_unreachable(); | |
ead1e424 ILT |
1345 | } |
1346 | ||
1347 | // Set the address of an Output_section. This is where we handle | |
1348 | // setting the addresses of any Output_section_data objects. | |
1349 | ||
1350 | void | |
1351 | Output_section::do_set_address(uint64_t address, off_t startoff) | |
1352 | { | |
1353 | if (this->input_sections_.empty()) | |
1354 | return; | |
1355 | ||
1356 | off_t off = startoff + this->first_input_offset_; | |
1357 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
1358 | p != this->input_sections_.end(); | |
1359 | ++p) | |
1360 | { | |
1361 | off = align_address(off, p->addralign()); | |
1362 | p->set_address(address + (off - startoff), off, startoff); | |
1363 | off += p->data_size(); | |
1364 | } | |
1365 | ||
1366 | this->set_data_size(off - startoff); | |
1367 | } | |
1368 | ||
61ba1cf9 ILT |
1369 | // Write the section header to *OSHDR. |
1370 | ||
1371 | template<int size, bool big_endian> | |
1372 | void | |
16649710 ILT |
1373 | Output_section::write_header(const Layout* layout, |
1374 | const Stringpool* secnamepool, | |
61ba1cf9 ILT |
1375 | elfcpp::Shdr_write<size, big_endian>* oshdr) const |
1376 | { | |
1377 | oshdr->put_sh_name(secnamepool->get_offset(this->name_)); | |
1378 | oshdr->put_sh_type(this->type_); | |
1379 | oshdr->put_sh_flags(this->flags_); | |
1380 | oshdr->put_sh_addr(this->address()); | |
1381 | oshdr->put_sh_offset(this->offset()); | |
1382 | oshdr->put_sh_size(this->data_size()); | |
16649710 ILT |
1383 | if (this->link_section_ != NULL) |
1384 | oshdr->put_sh_link(this->link_section_->out_shndx()); | |
1385 | else if (this->should_link_to_symtab_) | |
1386 | oshdr->put_sh_link(layout->symtab_section()->out_shndx()); | |
1387 | else if (this->should_link_to_dynsym_) | |
1388 | oshdr->put_sh_link(layout->dynsym_section()->out_shndx()); | |
1389 | else | |
1390 | oshdr->put_sh_link(this->link_); | |
1391 | if (this->info_section_ != NULL) | |
1392 | oshdr->put_sh_info(this->info_section_->out_shndx()); | |
1393 | else | |
1394 | oshdr->put_sh_info(this->info_); | |
61ba1cf9 ILT |
1395 | oshdr->put_sh_addralign(this->addralign_); |
1396 | oshdr->put_sh_entsize(this->entsize_); | |
a2fb1b05 ILT |
1397 | } |
1398 | ||
ead1e424 ILT |
1399 | // Write out the data. For input sections the data is written out by |
1400 | // Object::relocate, but we have to handle Output_section_data objects | |
1401 | // here. | |
1402 | ||
1403 | void | |
1404 | Output_section::do_write(Output_file* of) | |
1405 | { | |
c51e6221 ILT |
1406 | off_t output_section_file_offset = this->offset(); |
1407 | for (Fill_list::iterator p = this->fills_.begin(); | |
1408 | p != this->fills_.end(); | |
1409 | ++p) | |
1410 | { | |
1411 | std::string fill_data(of->target()->code_fill(p->length())); | |
1412 | of->write(output_section_file_offset + p->section_offset(), | |
1413 | fill_data.data(), fill_data.size()); | |
1414 | } | |
1415 | ||
ead1e424 ILT |
1416 | for (Input_section_list::iterator p = this->input_sections_.begin(); |
1417 | p != this->input_sections_.end(); | |
1418 | ++p) | |
1419 | p->write(of); | |
1420 | } | |
1421 | ||
a2fb1b05 ILT |
1422 | // Output segment methods. |
1423 | ||
1424 | Output_segment::Output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags) | |
54dc6425 | 1425 | : output_data_(), |
75f65a3e | 1426 | output_bss_(), |
a2fb1b05 ILT |
1427 | vaddr_(0), |
1428 | paddr_(0), | |
1429 | memsz_(0), | |
1430 | align_(0), | |
1431 | offset_(0), | |
1432 | filesz_(0), | |
1433 | type_(type), | |
ead1e424 ILT |
1434 | flags_(flags), |
1435 | is_align_known_(false) | |
a2fb1b05 ILT |
1436 | { |
1437 | } | |
1438 | ||
1439 | // Add an Output_section to an Output_segment. | |
1440 | ||
1441 | void | |
75f65a3e | 1442 | Output_segment::add_output_section(Output_section* os, |
dbe717ef ILT |
1443 | elfcpp::Elf_Word seg_flags, |
1444 | bool front) | |
a2fb1b05 | 1445 | { |
a3ad94ed ILT |
1446 | gold_assert((os->flags() & elfcpp::SHF_ALLOC) != 0); |
1447 | gold_assert(!this->is_align_known_); | |
75f65a3e | 1448 | |
ead1e424 | 1449 | // Update the segment flags. |
75f65a3e | 1450 | this->flags_ |= seg_flags; |
75f65a3e ILT |
1451 | |
1452 | Output_segment::Output_data_list* pdl; | |
1453 | if (os->type() == elfcpp::SHT_NOBITS) | |
1454 | pdl = &this->output_bss_; | |
1455 | else | |
1456 | pdl = &this->output_data_; | |
54dc6425 | 1457 | |
a2fb1b05 ILT |
1458 | // So that PT_NOTE segments will work correctly, we need to ensure |
1459 | // that all SHT_NOTE sections are adjacent. This will normally | |
1460 | // happen automatically, because all the SHT_NOTE input sections | |
1461 | // will wind up in the same output section. However, it is possible | |
1462 | // for multiple SHT_NOTE input sections to have different section | |
1463 | // flags, and thus be in different output sections, but for the | |
1464 | // different section flags to map into the same segment flags and | |
1465 | // thus the same output segment. | |
54dc6425 ILT |
1466 | |
1467 | // Note that while there may be many input sections in an output | |
1468 | // section, there are normally only a few output sections in an | |
1469 | // output segment. This loop is expected to be fast. | |
1470 | ||
61ba1cf9 | 1471 | if (os->type() == elfcpp::SHT_NOTE && !pdl->empty()) |
a2fb1b05 | 1472 | { |
a3ad94ed | 1473 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 1474 | do |
54dc6425 | 1475 | { |
75f65a3e | 1476 | --p; |
54dc6425 ILT |
1477 | if ((*p)->is_section_type(elfcpp::SHT_NOTE)) |
1478 | { | |
dbe717ef | 1479 | // We don't worry about the FRONT parameter. |
54dc6425 | 1480 | ++p; |
75f65a3e | 1481 | pdl->insert(p, os); |
54dc6425 ILT |
1482 | return; |
1483 | } | |
1484 | } | |
75f65a3e | 1485 | while (p != pdl->begin()); |
54dc6425 ILT |
1486 | } |
1487 | ||
1488 | // Similarly, so that PT_TLS segments will work, we need to group | |
75f65a3e ILT |
1489 | // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special |
1490 | // case: we group the SHF_TLS/SHT_NOBITS sections right after the | |
1491 | // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS | |
07f397ab ILT |
1492 | // correctly. SHF_TLS sections get added to both a PT_LOAD segment |
1493 | // and the PT_TLS segment -- we do this grouping only for the | |
1494 | // PT_LOAD segment. | |
1495 | if (this->type_ != elfcpp::PT_TLS | |
1496 | && (os->flags() & elfcpp::SHF_TLS) != 0 | |
1497 | && !this->output_data_.empty()) | |
54dc6425 | 1498 | { |
75f65a3e ILT |
1499 | pdl = &this->output_data_; |
1500 | bool nobits = os->type() == elfcpp::SHT_NOBITS; | |
ead1e424 | 1501 | bool sawtls = false; |
a3ad94ed | 1502 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 1503 | do |
a2fb1b05 | 1504 | { |
75f65a3e | 1505 | --p; |
ead1e424 ILT |
1506 | bool insert; |
1507 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
1508 | { | |
1509 | sawtls = true; | |
1510 | // Put a NOBITS section after the first TLS section. | |
1511 | // But a PROGBITS section after the first TLS/PROGBITS | |
1512 | // section. | |
1513 | insert = nobits || !(*p)->is_section_type(elfcpp::SHT_NOBITS); | |
1514 | } | |
1515 | else | |
1516 | { | |
1517 | // If we've gone past the TLS sections, but we've seen a | |
1518 | // TLS section, then we need to insert this section now. | |
1519 | insert = sawtls; | |
1520 | } | |
1521 | ||
1522 | if (insert) | |
a2fb1b05 | 1523 | { |
dbe717ef | 1524 | // We don't worry about the FRONT parameter. |
a2fb1b05 | 1525 | ++p; |
75f65a3e | 1526 | pdl->insert(p, os); |
a2fb1b05 ILT |
1527 | return; |
1528 | } | |
1529 | } | |
75f65a3e | 1530 | while (p != pdl->begin()); |
ead1e424 | 1531 | |
dbe717ef ILT |
1532 | // There are no TLS sections yet; put this one at the requested |
1533 | // location in the section list. | |
a2fb1b05 ILT |
1534 | } |
1535 | ||
dbe717ef ILT |
1536 | if (front) |
1537 | pdl->push_front(os); | |
1538 | else | |
1539 | pdl->push_back(os); | |
75f65a3e ILT |
1540 | } |
1541 | ||
1542 | // Add an Output_data (which is not an Output_section) to the start of | |
1543 | // a segment. | |
1544 | ||
1545 | void | |
1546 | Output_segment::add_initial_output_data(Output_data* od) | |
1547 | { | |
a3ad94ed | 1548 | gold_assert(!this->is_align_known_); |
75f65a3e ILT |
1549 | this->output_data_.push_front(od); |
1550 | } | |
1551 | ||
1552 | // Return the maximum alignment of the Output_data in Output_segment. | |
ead1e424 | 1553 | // Once we compute this, we prohibit new sections from being added. |
75f65a3e ILT |
1554 | |
1555 | uint64_t | |
ead1e424 | 1556 | Output_segment::addralign() |
75f65a3e | 1557 | { |
ead1e424 ILT |
1558 | if (!this->is_align_known_) |
1559 | { | |
1560 | uint64_t addralign; | |
1561 | ||
1562 | addralign = Output_segment::maximum_alignment(&this->output_data_); | |
1563 | if (addralign > this->align_) | |
1564 | this->align_ = addralign; | |
1565 | ||
1566 | addralign = Output_segment::maximum_alignment(&this->output_bss_); | |
1567 | if (addralign > this->align_) | |
1568 | this->align_ = addralign; | |
1569 | ||
1570 | this->is_align_known_ = true; | |
1571 | } | |
1572 | ||
75f65a3e ILT |
1573 | return this->align_; |
1574 | } | |
1575 | ||
ead1e424 ILT |
1576 | // Return the maximum alignment of a list of Output_data. |
1577 | ||
1578 | uint64_t | |
1579 | Output_segment::maximum_alignment(const Output_data_list* pdl) | |
1580 | { | |
1581 | uint64_t ret = 0; | |
1582 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1583 | p != pdl->end(); | |
1584 | ++p) | |
1585 | { | |
1586 | uint64_t addralign = (*p)->addralign(); | |
1587 | if (addralign > ret) | |
1588 | ret = addralign; | |
1589 | } | |
1590 | return ret; | |
1591 | } | |
1592 | ||
4f4c5f80 ILT |
1593 | // Return the number of dynamic relocs applied to this segment. |
1594 | ||
1595 | unsigned int | |
1596 | Output_segment::dynamic_reloc_count() const | |
1597 | { | |
1598 | return (this->dynamic_reloc_count_list(&this->output_data_) | |
1599 | + this->dynamic_reloc_count_list(&this->output_bss_)); | |
1600 | } | |
1601 | ||
1602 | // Return the number of dynamic relocs applied to an Output_data_list. | |
1603 | ||
1604 | unsigned int | |
1605 | Output_segment::dynamic_reloc_count_list(const Output_data_list* pdl) const | |
1606 | { | |
1607 | unsigned int count = 0; | |
1608 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1609 | p != pdl->end(); | |
1610 | ++p) | |
1611 | count += (*p)->dynamic_reloc_count(); | |
1612 | return count; | |
1613 | } | |
1614 | ||
75f65a3e | 1615 | // Set the section addresses for an Output_segment. ADDR is the |
ead1e424 ILT |
1616 | // address and *POFF is the file offset. Set the section indexes |
1617 | // starting with *PSHNDX. Return the address of the immediately | |
1618 | // following segment. Update *POFF and *PSHNDX. | |
75f65a3e ILT |
1619 | |
1620 | uint64_t | |
ead1e424 ILT |
1621 | Output_segment::set_section_addresses(uint64_t addr, off_t* poff, |
1622 | unsigned int* pshndx) | |
75f65a3e | 1623 | { |
a3ad94ed | 1624 | gold_assert(this->type_ == elfcpp::PT_LOAD); |
75f65a3e ILT |
1625 | |
1626 | this->vaddr_ = addr; | |
1627 | this->paddr_ = addr; | |
1628 | ||
1629 | off_t orig_off = *poff; | |
1630 | this->offset_ = orig_off; | |
1631 | ||
ead1e424 ILT |
1632 | *poff = align_address(*poff, this->addralign()); |
1633 | ||
1634 | addr = this->set_section_list_addresses(&this->output_data_, addr, poff, | |
1635 | pshndx); | |
75f65a3e ILT |
1636 | this->filesz_ = *poff - orig_off; |
1637 | ||
1638 | off_t off = *poff; | |
1639 | ||
61ba1cf9 | 1640 | uint64_t ret = this->set_section_list_addresses(&this->output_bss_, addr, |
ead1e424 | 1641 | poff, pshndx); |
75f65a3e ILT |
1642 | this->memsz_ = *poff - orig_off; |
1643 | ||
1644 | // Ignore the file offset adjustments made by the BSS Output_data | |
1645 | // objects. | |
1646 | *poff = off; | |
61ba1cf9 ILT |
1647 | |
1648 | return ret; | |
75f65a3e ILT |
1649 | } |
1650 | ||
b8e6aad9 ILT |
1651 | // Set the addresses and file offsets in a list of Output_data |
1652 | // structures. | |
75f65a3e ILT |
1653 | |
1654 | uint64_t | |
1655 | Output_segment::set_section_list_addresses(Output_data_list* pdl, | |
ead1e424 ILT |
1656 | uint64_t addr, off_t* poff, |
1657 | unsigned int* pshndx) | |
75f65a3e | 1658 | { |
ead1e424 | 1659 | off_t startoff = *poff; |
75f65a3e | 1660 | |
ead1e424 | 1661 | off_t off = startoff; |
75f65a3e ILT |
1662 | for (Output_data_list::iterator p = pdl->begin(); |
1663 | p != pdl->end(); | |
1664 | ++p) | |
1665 | { | |
ead1e424 ILT |
1666 | off = align_address(off, (*p)->addralign()); |
1667 | (*p)->set_address(addr + (off - startoff), off); | |
1668 | ||
1669 | // Unless this is a PT_TLS segment, we want to ignore the size | |
1670 | // of a SHF_TLS/SHT_NOBITS section. Such a section does not | |
1671 | // affect the size of a PT_LOAD segment. | |
1672 | if (this->type_ == elfcpp::PT_TLS | |
1673 | || !(*p)->is_section_flag_set(elfcpp::SHF_TLS) | |
1674 | || !(*p)->is_section_type(elfcpp::SHT_NOBITS)) | |
1675 | off += (*p)->data_size(); | |
75f65a3e | 1676 | |
ead1e424 ILT |
1677 | if ((*p)->is_section()) |
1678 | { | |
1679 | (*p)->set_out_shndx(*pshndx); | |
1680 | ++*pshndx; | |
1681 | } | |
75f65a3e ILT |
1682 | } |
1683 | ||
1684 | *poff = off; | |
ead1e424 | 1685 | return addr + (off - startoff); |
75f65a3e ILT |
1686 | } |
1687 | ||
1688 | // For a non-PT_LOAD segment, set the offset from the sections, if | |
1689 | // any. | |
1690 | ||
1691 | void | |
1692 | Output_segment::set_offset() | |
1693 | { | |
a3ad94ed | 1694 | gold_assert(this->type_ != elfcpp::PT_LOAD); |
75f65a3e ILT |
1695 | |
1696 | if (this->output_data_.empty() && this->output_bss_.empty()) | |
1697 | { | |
1698 | this->vaddr_ = 0; | |
1699 | this->paddr_ = 0; | |
1700 | this->memsz_ = 0; | |
1701 | this->align_ = 0; | |
1702 | this->offset_ = 0; | |
1703 | this->filesz_ = 0; | |
1704 | return; | |
1705 | } | |
1706 | ||
1707 | const Output_data* first; | |
1708 | if (this->output_data_.empty()) | |
1709 | first = this->output_bss_.front(); | |
1710 | else | |
1711 | first = this->output_data_.front(); | |
1712 | this->vaddr_ = first->address(); | |
1713 | this->paddr_ = this->vaddr_; | |
1714 | this->offset_ = first->offset(); | |
1715 | ||
1716 | if (this->output_data_.empty()) | |
1717 | this->filesz_ = 0; | |
1718 | else | |
1719 | { | |
1720 | const Output_data* last_data = this->output_data_.back(); | |
1721 | this->filesz_ = (last_data->address() | |
1722 | + last_data->data_size() | |
1723 | - this->vaddr_); | |
1724 | } | |
1725 | ||
1726 | const Output_data* last; | |
1727 | if (this->output_bss_.empty()) | |
1728 | last = this->output_data_.back(); | |
1729 | else | |
1730 | last = this->output_bss_.back(); | |
1731 | this->memsz_ = (last->address() | |
1732 | + last->data_size() | |
1733 | - this->vaddr_); | |
75f65a3e ILT |
1734 | } |
1735 | ||
1736 | // Return the number of Output_sections in an Output_segment. | |
1737 | ||
1738 | unsigned int | |
1739 | Output_segment::output_section_count() const | |
1740 | { | |
1741 | return (this->output_section_count_list(&this->output_data_) | |
1742 | + this->output_section_count_list(&this->output_bss_)); | |
1743 | } | |
1744 | ||
1745 | // Return the number of Output_sections in an Output_data_list. | |
1746 | ||
1747 | unsigned int | |
1748 | Output_segment::output_section_count_list(const Output_data_list* pdl) const | |
1749 | { | |
1750 | unsigned int count = 0; | |
1751 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1752 | p != pdl->end(); | |
1753 | ++p) | |
1754 | { | |
1755 | if ((*p)->is_section()) | |
1756 | ++count; | |
1757 | } | |
1758 | return count; | |
a2fb1b05 ILT |
1759 | } |
1760 | ||
61ba1cf9 ILT |
1761 | // Write the segment data into *OPHDR. |
1762 | ||
1763 | template<int size, bool big_endian> | |
1764 | void | |
ead1e424 | 1765 | Output_segment::write_header(elfcpp::Phdr_write<size, big_endian>* ophdr) |
61ba1cf9 ILT |
1766 | { |
1767 | ophdr->put_p_type(this->type_); | |
1768 | ophdr->put_p_offset(this->offset_); | |
1769 | ophdr->put_p_vaddr(this->vaddr_); | |
1770 | ophdr->put_p_paddr(this->paddr_); | |
1771 | ophdr->put_p_filesz(this->filesz_); | |
1772 | ophdr->put_p_memsz(this->memsz_); | |
1773 | ophdr->put_p_flags(this->flags_); | |
ead1e424 | 1774 | ophdr->put_p_align(this->addralign()); |
61ba1cf9 ILT |
1775 | } |
1776 | ||
1777 | // Write the section headers into V. | |
1778 | ||
1779 | template<int size, bool big_endian> | |
1780 | unsigned char* | |
16649710 ILT |
1781 | Output_segment::write_section_headers(const Layout* layout, |
1782 | const Stringpool* secnamepool, | |
ead1e424 ILT |
1783 | unsigned char* v, |
1784 | unsigned int *pshndx | |
5482377d ILT |
1785 | ACCEPT_SIZE_ENDIAN) const |
1786 | { | |
ead1e424 ILT |
1787 | // Every section that is attached to a segment must be attached to a |
1788 | // PT_LOAD segment, so we only write out section headers for PT_LOAD | |
1789 | // segments. | |
1790 | if (this->type_ != elfcpp::PT_LOAD) | |
1791 | return v; | |
1792 | ||
593f47df ILT |
1793 | v = this->write_section_headers_list |
1794 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 1795 | layout, secnamepool, &this->output_data_, v, pshndx |
593f47df ILT |
1796 | SELECT_SIZE_ENDIAN(size, big_endian)); |
1797 | v = this->write_section_headers_list | |
1798 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
16649710 | 1799 | layout, secnamepool, &this->output_bss_, v, pshndx |
593f47df | 1800 | SELECT_SIZE_ENDIAN(size, big_endian)); |
61ba1cf9 ILT |
1801 | return v; |
1802 | } | |
1803 | ||
1804 | template<int size, bool big_endian> | |
1805 | unsigned char* | |
16649710 ILT |
1806 | Output_segment::write_section_headers_list(const Layout* layout, |
1807 | const Stringpool* secnamepool, | |
61ba1cf9 | 1808 | const Output_data_list* pdl, |
ead1e424 ILT |
1809 | unsigned char* v, |
1810 | unsigned int* pshndx | |
5482377d | 1811 | ACCEPT_SIZE_ENDIAN) const |
61ba1cf9 ILT |
1812 | { |
1813 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
1814 | for (Output_data_list::const_iterator p = pdl->begin(); | |
1815 | p != pdl->end(); | |
1816 | ++p) | |
1817 | { | |
1818 | if ((*p)->is_section()) | |
1819 | { | |
5482377d | 1820 | const Output_section* ps = static_cast<const Output_section*>(*p); |
a3ad94ed | 1821 | gold_assert(*pshndx == ps->out_shndx()); |
61ba1cf9 | 1822 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 1823 | ps->write_header(layout, secnamepool, &oshdr); |
61ba1cf9 | 1824 | v += shdr_size; |
ead1e424 | 1825 | ++*pshndx; |
61ba1cf9 ILT |
1826 | } |
1827 | } | |
1828 | return v; | |
1829 | } | |
1830 | ||
a2fb1b05 ILT |
1831 | // Output_file methods. |
1832 | ||
c51e6221 | 1833 | Output_file::Output_file(const General_options& options, Target* target) |
61ba1cf9 | 1834 | : options_(options), |
c51e6221 | 1835 | target_(target), |
61ba1cf9 ILT |
1836 | name_(options.output_file_name()), |
1837 | o_(-1), | |
1838 | file_size_(0), | |
1839 | base_(NULL) | |
1840 | { | |
1841 | } | |
1842 | ||
1843 | // Open the output file. | |
1844 | ||
a2fb1b05 | 1845 | void |
61ba1cf9 | 1846 | Output_file::open(off_t file_size) |
a2fb1b05 | 1847 | { |
61ba1cf9 ILT |
1848 | this->file_size_ = file_size; |
1849 | ||
4e9d8586 ILT |
1850 | // Unlink the file first; otherwise the open() may fail if the file |
1851 | // is busy (e.g. it's an executable that's currently being executed). | |
1852 | // | |
1853 | // However, the linker may be part of a system where a zero-length | |
1854 | // file is created for it to write to, with tight permissions (gcc | |
1855 | // 2.95 did something like this). Unlinking the file would work | |
1856 | // around those permission controls, so we only unlink if the file | |
1857 | // has a non-zero size. We also unlink only regular files to avoid | |
1858 | // trouble with directories/etc. | |
1859 | // | |
1860 | // If we fail, continue; this command is merely a best-effort attempt | |
1861 | // to improve the odds for open(). | |
1862 | ||
4e9d8586 | 1863 | struct stat s; |
5ffcaa86 ILT |
1864 | if (::stat(this->name_, &s) == 0 && s.st_size != 0) |
1865 | unlink_if_ordinary(this->name_); | |
4e9d8586 | 1866 | |
7e1edb90 | 1867 | int mode = parameters->output_is_object() ? 0666 : 0777; |
61ba1cf9 ILT |
1868 | int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode); |
1869 | if (o < 0) | |
75f2446e | 1870 | gold_fatal(_("%s: open: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1871 | this->o_ = o; |
1872 | ||
1873 | // Write out one byte to make the file the right size. | |
1874 | if (::lseek(o, file_size - 1, SEEK_SET) < 0) | |
75f2446e | 1875 | gold_fatal(_("%s: lseek: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1876 | char b = 0; |
1877 | if (::write(o, &b, 1) != 1) | |
75f2446e | 1878 | gold_fatal(_("%s: write: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1879 | |
1880 | // Map the file into memory. | |
1881 | void* base = ::mmap(NULL, file_size, PROT_READ | PROT_WRITE, | |
1882 | MAP_SHARED, o, 0); | |
1883 | if (base == MAP_FAILED) | |
75f2446e | 1884 | gold_fatal(_("%s: mmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1885 | this->base_ = static_cast<unsigned char*>(base); |
1886 | } | |
1887 | ||
1888 | // Close the output file. | |
1889 | ||
1890 | void | |
1891 | Output_file::close() | |
1892 | { | |
1893 | if (::munmap(this->base_, this->file_size_) < 0) | |
a0c4fb0a | 1894 | gold_error(_("%s: munmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
1895 | this->base_ = NULL; |
1896 | ||
1897 | if (::close(this->o_) < 0) | |
75f2446e | 1898 | gold_error(_("%s: close: %s"), this->name_, strerror(errno)); |
61ba1cf9 | 1899 | this->o_ = -1; |
a2fb1b05 ILT |
1900 | } |
1901 | ||
1902 | // Instantiate the templates we need. We could use the configure | |
1903 | // script to restrict this to only the ones for implemented targets. | |
1904 | ||
193a53d9 | 1905 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
1906 | template |
1907 | off_t | |
1908 | Output_section::add_input_section<32, false>( | |
730cdc88 | 1909 | Sized_relobj<32, false>* object, |
ead1e424 | 1910 | unsigned int shndx, |
a2fb1b05 | 1911 | const char* secname, |
730cdc88 ILT |
1912 | const elfcpp::Shdr<32, false>& shdr, |
1913 | unsigned int reloc_shndx); | |
193a53d9 | 1914 | #endif |
a2fb1b05 | 1915 | |
193a53d9 | 1916 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
1917 | template |
1918 | off_t | |
1919 | Output_section::add_input_section<32, true>( | |
730cdc88 | 1920 | Sized_relobj<32, true>* object, |
ead1e424 | 1921 | unsigned int shndx, |
a2fb1b05 | 1922 | const char* secname, |
730cdc88 ILT |
1923 | const elfcpp::Shdr<32, true>& shdr, |
1924 | unsigned int reloc_shndx); | |
193a53d9 | 1925 | #endif |
a2fb1b05 | 1926 | |
193a53d9 | 1927 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
1928 | template |
1929 | off_t | |
1930 | Output_section::add_input_section<64, false>( | |
730cdc88 | 1931 | Sized_relobj<64, false>* object, |
ead1e424 | 1932 | unsigned int shndx, |
a2fb1b05 | 1933 | const char* secname, |
730cdc88 ILT |
1934 | const elfcpp::Shdr<64, false>& shdr, |
1935 | unsigned int reloc_shndx); | |
193a53d9 | 1936 | #endif |
a2fb1b05 | 1937 | |
193a53d9 | 1938 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
1939 | template |
1940 | off_t | |
1941 | Output_section::add_input_section<64, true>( | |
730cdc88 | 1942 | Sized_relobj<64, true>* object, |
ead1e424 | 1943 | unsigned int shndx, |
a2fb1b05 | 1944 | const char* secname, |
730cdc88 ILT |
1945 | const elfcpp::Shdr<64, true>& shdr, |
1946 | unsigned int reloc_shndx); | |
193a53d9 | 1947 | #endif |
a2fb1b05 | 1948 | |
193a53d9 | 1949 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1950 | template |
1951 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, false>; | |
193a53d9 | 1952 | #endif |
c06b7b0b | 1953 | |
193a53d9 | 1954 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1955 | template |
1956 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, true>; | |
193a53d9 | 1957 | #endif |
c06b7b0b | 1958 | |
193a53d9 | 1959 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1960 | template |
1961 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, false>; | |
193a53d9 | 1962 | #endif |
c06b7b0b | 1963 | |
193a53d9 | 1964 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1965 | template |
1966 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, true>; | |
193a53d9 | 1967 | #endif |
c06b7b0b | 1968 | |
193a53d9 | 1969 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1970 | template |
1971 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, false>; | |
193a53d9 | 1972 | #endif |
c06b7b0b | 1973 | |
193a53d9 | 1974 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1975 | template |
1976 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, true>; | |
193a53d9 | 1977 | #endif |
c06b7b0b | 1978 | |
193a53d9 | 1979 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
1980 | template |
1981 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, false>; | |
193a53d9 | 1982 | #endif |
c06b7b0b | 1983 | |
193a53d9 | 1984 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
1985 | template |
1986 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, true>; | |
193a53d9 | 1987 | #endif |
c06b7b0b | 1988 | |
193a53d9 | 1989 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
1990 | template |
1991 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, false>; | |
193a53d9 | 1992 | #endif |
c06b7b0b | 1993 | |
193a53d9 | 1994 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
1995 | template |
1996 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, true>; | |
193a53d9 | 1997 | #endif |
c06b7b0b | 1998 | |
193a53d9 | 1999 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
2000 | template |
2001 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, false>; | |
193a53d9 | 2002 | #endif |
c06b7b0b | 2003 | |
193a53d9 | 2004 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
2005 | template |
2006 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, true>; | |
193a53d9 | 2007 | #endif |
c06b7b0b | 2008 | |
193a53d9 | 2009 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
2010 | template |
2011 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
193a53d9 | 2012 | #endif |
c06b7b0b | 2013 | |
193a53d9 | 2014 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
2015 | template |
2016 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
193a53d9 | 2017 | #endif |
c06b7b0b | 2018 | |
193a53d9 | 2019 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
2020 | template |
2021 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
193a53d9 | 2022 | #endif |
c06b7b0b | 2023 | |
193a53d9 | 2024 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
2025 | template |
2026 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
193a53d9 | 2027 | #endif |
c06b7b0b | 2028 | |
193a53d9 | 2029 | #ifdef HAVE_TARGET_32_LITTLE |
ead1e424 | 2030 | template |
dbe717ef | 2031 | class Output_data_got<32, false>; |
193a53d9 | 2032 | #endif |
ead1e424 | 2033 | |
193a53d9 | 2034 | #ifdef HAVE_TARGET_32_BIG |
ead1e424 | 2035 | template |
dbe717ef | 2036 | class Output_data_got<32, true>; |
193a53d9 | 2037 | #endif |
ead1e424 | 2038 | |
193a53d9 | 2039 | #ifdef HAVE_TARGET_64_LITTLE |
ead1e424 | 2040 | template |
dbe717ef | 2041 | class Output_data_got<64, false>; |
193a53d9 | 2042 | #endif |
ead1e424 | 2043 | |
193a53d9 | 2044 | #ifdef HAVE_TARGET_64_BIG |
ead1e424 | 2045 | template |
dbe717ef | 2046 | class Output_data_got<64, true>; |
193a53d9 | 2047 | #endif |
ead1e424 | 2048 | |
a2fb1b05 | 2049 | } // End namespace gold. |