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a2fb1b05 ILT |
1 | // output.cc -- manage the output file for gold |
2 | ||
ebdbb458 | 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
6cb15b7f ILT |
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> | |
04bf7072 | 26 | #include <cstring> |
61ba1cf9 ILT |
27 | #include <cerrno> |
28 | #include <fcntl.h> | |
29 | #include <unistd.h> | |
30 | #include <sys/mman.h> | |
4e9d8586 | 31 | #include <sys/stat.h> |
75f65a3e | 32 | #include <algorithm> |
5ffcaa86 | 33 | #include "libiberty.h" // for unlink_if_ordinary() |
a2fb1b05 | 34 | |
7e1edb90 | 35 | #include "parameters.h" |
a2fb1b05 | 36 | #include "object.h" |
ead1e424 ILT |
37 | #include "symtab.h" |
38 | #include "reloc.h" | |
b8e6aad9 | 39 | #include "merge.h" |
a2fb1b05 ILT |
40 | #include "output.h" |
41 | ||
c420411f ILT |
42 | // Some BSD systems still use MAP_ANON instead of MAP_ANONYMOUS |
43 | #ifndef MAP_ANONYMOUS | |
44 | # define MAP_ANONYMOUS MAP_ANON | |
45 | #endif | |
46 | ||
a2fb1b05 ILT |
47 | namespace gold |
48 | { | |
49 | ||
a3ad94ed ILT |
50 | // Output_data variables. |
51 | ||
27bc2bce | 52 | bool Output_data::allocated_sizes_are_fixed; |
a3ad94ed | 53 | |
a2fb1b05 ILT |
54 | // Output_data methods. |
55 | ||
56 | Output_data::~Output_data() | |
57 | { | |
58 | } | |
59 | ||
730cdc88 ILT |
60 | // Return the default alignment for the target size. |
61 | ||
62 | uint64_t | |
63 | Output_data::default_alignment() | |
64 | { | |
8851ecca ILT |
65 | return Output_data::default_alignment_for_size( |
66 | parameters->target().get_size()); | |
730cdc88 ILT |
67 | } |
68 | ||
75f65a3e ILT |
69 | // Return the default alignment for a size--32 or 64. |
70 | ||
71 | uint64_t | |
730cdc88 | 72 | Output_data::default_alignment_for_size(int size) |
75f65a3e ILT |
73 | { |
74 | if (size == 32) | |
75 | return 4; | |
76 | else if (size == 64) | |
77 | return 8; | |
78 | else | |
a3ad94ed | 79 | gold_unreachable(); |
75f65a3e ILT |
80 | } |
81 | ||
75f65a3e ILT |
82 | // Output_section_header methods. This currently assumes that the |
83 | // segment and section lists are complete at construction time. | |
84 | ||
85 | Output_section_headers::Output_section_headers( | |
16649710 ILT |
86 | const Layout* layout, |
87 | const Layout::Segment_list* segment_list, | |
6a74a719 | 88 | const Layout::Section_list* section_list, |
16649710 | 89 | const Layout::Section_list* unattached_section_list, |
d491d34e ILT |
90 | const Stringpool* secnamepool, |
91 | const Output_section* shstrtab_section) | |
9025d29d | 92 | : layout_(layout), |
75f65a3e | 93 | segment_list_(segment_list), |
6a74a719 | 94 | section_list_(section_list), |
a3ad94ed | 95 | unattached_section_list_(unattached_section_list), |
d491d34e ILT |
96 | secnamepool_(secnamepool), |
97 | shstrtab_section_(shstrtab_section) | |
75f65a3e | 98 | { |
61ba1cf9 ILT |
99 | // Count all the sections. Start with 1 for the null section. |
100 | off_t count = 1; | |
8851ecca | 101 | if (!parameters->options().relocatable()) |
6a74a719 ILT |
102 | { |
103 | for (Layout::Segment_list::const_iterator p = segment_list->begin(); | |
104 | p != segment_list->end(); | |
105 | ++p) | |
106 | if ((*p)->type() == elfcpp::PT_LOAD) | |
107 | count += (*p)->output_section_count(); | |
108 | } | |
109 | else | |
110 | { | |
111 | for (Layout::Section_list::const_iterator p = section_list->begin(); | |
112 | p != section_list->end(); | |
113 | ++p) | |
114 | if (((*p)->flags() & elfcpp::SHF_ALLOC) != 0) | |
115 | ++count; | |
116 | } | |
16649710 | 117 | count += unattached_section_list->size(); |
75f65a3e | 118 | |
8851ecca | 119 | const int size = parameters->target().get_size(); |
75f65a3e ILT |
120 | int shdr_size; |
121 | if (size == 32) | |
122 | shdr_size = elfcpp::Elf_sizes<32>::shdr_size; | |
123 | else if (size == 64) | |
124 | shdr_size = elfcpp::Elf_sizes<64>::shdr_size; | |
125 | else | |
a3ad94ed | 126 | gold_unreachable(); |
75f65a3e ILT |
127 | |
128 | this->set_data_size(count * shdr_size); | |
129 | } | |
130 | ||
61ba1cf9 ILT |
131 | // Write out the section headers. |
132 | ||
75f65a3e | 133 | void |
61ba1cf9 | 134 | Output_section_headers::do_write(Output_file* of) |
a2fb1b05 | 135 | { |
8851ecca | 136 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 137 | { |
9025d29d | 138 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca ILT |
139 | case Parameters::TARGET_32_LITTLE: |
140 | this->do_sized_write<32, false>(of); | |
141 | break; | |
9025d29d | 142 | #endif |
8851ecca ILT |
143 | #ifdef HAVE_TARGET_32_BIG |
144 | case Parameters::TARGET_32_BIG: | |
145 | this->do_sized_write<32, true>(of); | |
146 | break; | |
9025d29d | 147 | #endif |
9025d29d | 148 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca ILT |
149 | case Parameters::TARGET_64_LITTLE: |
150 | this->do_sized_write<64, false>(of); | |
151 | break; | |
9025d29d | 152 | #endif |
8851ecca ILT |
153 | #ifdef HAVE_TARGET_64_BIG |
154 | case Parameters::TARGET_64_BIG: | |
155 | this->do_sized_write<64, true>(of); | |
156 | break; | |
157 | #endif | |
158 | default: | |
159 | gold_unreachable(); | |
61ba1cf9 | 160 | } |
61ba1cf9 ILT |
161 | } |
162 | ||
163 | template<int size, bool big_endian> | |
164 | void | |
165 | Output_section_headers::do_sized_write(Output_file* of) | |
166 | { | |
167 | off_t all_shdrs_size = this->data_size(); | |
168 | unsigned char* view = of->get_output_view(this->offset(), all_shdrs_size); | |
169 | ||
170 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
171 | unsigned char* v = view; | |
172 | ||
173 | { | |
174 | typename elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
175 | oshdr.put_sh_name(0); | |
176 | oshdr.put_sh_type(elfcpp::SHT_NULL); | |
177 | oshdr.put_sh_flags(0); | |
178 | oshdr.put_sh_addr(0); | |
179 | oshdr.put_sh_offset(0); | |
d491d34e ILT |
180 | |
181 | size_t section_count = (this->data_size() | |
182 | / elfcpp::Elf_sizes<size>::shdr_size); | |
183 | if (section_count < elfcpp::SHN_LORESERVE) | |
184 | oshdr.put_sh_size(0); | |
185 | else | |
186 | oshdr.put_sh_size(section_count); | |
187 | ||
188 | unsigned int shstrndx = this->shstrtab_section_->out_shndx(); | |
189 | if (shstrndx < elfcpp::SHN_LORESERVE) | |
190 | oshdr.put_sh_link(0); | |
191 | else | |
192 | oshdr.put_sh_link(shstrndx); | |
193 | ||
61ba1cf9 ILT |
194 | oshdr.put_sh_info(0); |
195 | oshdr.put_sh_addralign(0); | |
196 | oshdr.put_sh_entsize(0); | |
197 | } | |
198 | ||
199 | v += shdr_size; | |
200 | ||
6a74a719 | 201 | unsigned int shndx = 1; |
8851ecca | 202 | if (!parameters->options().relocatable()) |
6a74a719 ILT |
203 | { |
204 | for (Layout::Segment_list::const_iterator p = | |
205 | this->segment_list_->begin(); | |
206 | p != this->segment_list_->end(); | |
207 | ++p) | |
208 | v = (*p)->write_section_headers<size, big_endian>(this->layout_, | |
209 | this->secnamepool_, | |
210 | v, | |
211 | &shndx); | |
212 | } | |
213 | else | |
214 | { | |
215 | for (Layout::Section_list::const_iterator p = | |
216 | this->section_list_->begin(); | |
217 | p != this->section_list_->end(); | |
218 | ++p) | |
219 | { | |
220 | // We do unallocated sections below, except that group | |
221 | // sections have to come first. | |
222 | if (((*p)->flags() & elfcpp::SHF_ALLOC) == 0 | |
223 | && (*p)->type() != elfcpp::SHT_GROUP) | |
224 | continue; | |
225 | gold_assert(shndx == (*p)->out_shndx()); | |
226 | elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
227 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); | |
228 | v += shdr_size; | |
229 | ++shndx; | |
230 | } | |
231 | } | |
232 | ||
a3ad94ed | 233 | for (Layout::Section_list::const_iterator p = |
16649710 ILT |
234 | this->unattached_section_list_->begin(); |
235 | p != this->unattached_section_list_->end(); | |
61ba1cf9 ILT |
236 | ++p) |
237 | { | |
6a74a719 ILT |
238 | // For a relocatable link, we did unallocated group sections |
239 | // above, since they have to come first. | |
240 | if ((*p)->type() == elfcpp::SHT_GROUP | |
8851ecca | 241 | && parameters->options().relocatable()) |
6a74a719 | 242 | continue; |
a3ad94ed | 243 | gold_assert(shndx == (*p)->out_shndx()); |
61ba1cf9 | 244 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 245 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); |
61ba1cf9 | 246 | v += shdr_size; |
ead1e424 | 247 | ++shndx; |
61ba1cf9 ILT |
248 | } |
249 | ||
250 | of->write_output_view(this->offset(), all_shdrs_size, view); | |
a2fb1b05 ILT |
251 | } |
252 | ||
54dc6425 ILT |
253 | // Output_segment_header methods. |
254 | ||
61ba1cf9 | 255 | Output_segment_headers::Output_segment_headers( |
61ba1cf9 | 256 | const Layout::Segment_list& segment_list) |
9025d29d | 257 | : segment_list_(segment_list) |
61ba1cf9 | 258 | { |
8851ecca | 259 | const int size = parameters->target().get_size(); |
61ba1cf9 ILT |
260 | int phdr_size; |
261 | if (size == 32) | |
262 | phdr_size = elfcpp::Elf_sizes<32>::phdr_size; | |
263 | else if (size == 64) | |
264 | phdr_size = elfcpp::Elf_sizes<64>::phdr_size; | |
265 | else | |
a3ad94ed | 266 | gold_unreachable(); |
61ba1cf9 ILT |
267 | |
268 | this->set_data_size(segment_list.size() * phdr_size); | |
269 | } | |
270 | ||
54dc6425 | 271 | void |
61ba1cf9 | 272 | Output_segment_headers::do_write(Output_file* of) |
75f65a3e | 273 | { |
8851ecca | 274 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 275 | { |
9025d29d | 276 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca ILT |
277 | case Parameters::TARGET_32_LITTLE: |
278 | this->do_sized_write<32, false>(of); | |
279 | break; | |
9025d29d | 280 | #endif |
8851ecca ILT |
281 | #ifdef HAVE_TARGET_32_BIG |
282 | case Parameters::TARGET_32_BIG: | |
283 | this->do_sized_write<32, true>(of); | |
284 | break; | |
9025d29d | 285 | #endif |
9025d29d | 286 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca ILT |
287 | case Parameters::TARGET_64_LITTLE: |
288 | this->do_sized_write<64, false>(of); | |
289 | break; | |
9025d29d | 290 | #endif |
8851ecca ILT |
291 | #ifdef HAVE_TARGET_64_BIG |
292 | case Parameters::TARGET_64_BIG: | |
293 | this->do_sized_write<64, true>(of); | |
294 | break; | |
295 | #endif | |
296 | default: | |
297 | gold_unreachable(); | |
61ba1cf9 | 298 | } |
61ba1cf9 ILT |
299 | } |
300 | ||
301 | template<int size, bool big_endian> | |
302 | void | |
303 | Output_segment_headers::do_sized_write(Output_file* of) | |
304 | { | |
305 | const int phdr_size = elfcpp::Elf_sizes<size>::phdr_size; | |
306 | off_t all_phdrs_size = this->segment_list_.size() * phdr_size; | |
a445fddf | 307 | gold_assert(all_phdrs_size == this->data_size()); |
61ba1cf9 ILT |
308 | unsigned char* view = of->get_output_view(this->offset(), |
309 | all_phdrs_size); | |
310 | unsigned char* v = view; | |
311 | for (Layout::Segment_list::const_iterator p = this->segment_list_.begin(); | |
312 | p != this->segment_list_.end(); | |
313 | ++p) | |
314 | { | |
315 | elfcpp::Phdr_write<size, big_endian> ophdr(v); | |
316 | (*p)->write_header(&ophdr); | |
317 | v += phdr_size; | |
318 | } | |
319 | ||
a445fddf ILT |
320 | gold_assert(v - view == all_phdrs_size); |
321 | ||
61ba1cf9 | 322 | of->write_output_view(this->offset(), all_phdrs_size, view); |
75f65a3e ILT |
323 | } |
324 | ||
325 | // Output_file_header methods. | |
326 | ||
9025d29d | 327 | Output_file_header::Output_file_header(const Target* target, |
75f65a3e | 328 | const Symbol_table* symtab, |
d391083d ILT |
329 | const Output_segment_headers* osh, |
330 | const char* entry) | |
9025d29d | 331 | : target_(target), |
75f65a3e | 332 | symtab_(symtab), |
61ba1cf9 | 333 | segment_header_(osh), |
75f65a3e | 334 | section_header_(NULL), |
d391083d ILT |
335 | shstrtab_(NULL), |
336 | entry_(entry) | |
75f65a3e | 337 | { |
8851ecca | 338 | const int size = parameters->target().get_size(); |
61ba1cf9 ILT |
339 | int ehdr_size; |
340 | if (size == 32) | |
341 | ehdr_size = elfcpp::Elf_sizes<32>::ehdr_size; | |
342 | else if (size == 64) | |
343 | ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size; | |
344 | else | |
a3ad94ed | 345 | gold_unreachable(); |
61ba1cf9 ILT |
346 | |
347 | this->set_data_size(ehdr_size); | |
75f65a3e ILT |
348 | } |
349 | ||
350 | // Set the section table information for a file header. | |
351 | ||
352 | void | |
353 | Output_file_header::set_section_info(const Output_section_headers* shdrs, | |
354 | const Output_section* shstrtab) | |
355 | { | |
356 | this->section_header_ = shdrs; | |
357 | this->shstrtab_ = shstrtab; | |
358 | } | |
359 | ||
360 | // Write out the file header. | |
361 | ||
362 | void | |
61ba1cf9 | 363 | Output_file_header::do_write(Output_file* of) |
54dc6425 | 364 | { |
27bc2bce ILT |
365 | gold_assert(this->offset() == 0); |
366 | ||
8851ecca | 367 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 368 | { |
9025d29d | 369 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca ILT |
370 | case Parameters::TARGET_32_LITTLE: |
371 | this->do_sized_write<32, false>(of); | |
372 | break; | |
9025d29d | 373 | #endif |
8851ecca ILT |
374 | #ifdef HAVE_TARGET_32_BIG |
375 | case Parameters::TARGET_32_BIG: | |
376 | this->do_sized_write<32, true>(of); | |
377 | break; | |
9025d29d | 378 | #endif |
9025d29d | 379 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca ILT |
380 | case Parameters::TARGET_64_LITTLE: |
381 | this->do_sized_write<64, false>(of); | |
382 | break; | |
9025d29d | 383 | #endif |
8851ecca ILT |
384 | #ifdef HAVE_TARGET_64_BIG |
385 | case Parameters::TARGET_64_BIG: | |
386 | this->do_sized_write<64, true>(of); | |
387 | break; | |
388 | #endif | |
389 | default: | |
390 | gold_unreachable(); | |
61ba1cf9 | 391 | } |
61ba1cf9 ILT |
392 | } |
393 | ||
394 | // Write out the file header with appropriate size and endianess. | |
395 | ||
396 | template<int size, bool big_endian> | |
397 | void | |
398 | Output_file_header::do_sized_write(Output_file* of) | |
399 | { | |
a3ad94ed | 400 | gold_assert(this->offset() == 0); |
61ba1cf9 ILT |
401 | |
402 | int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; | |
403 | unsigned char* view = of->get_output_view(0, ehdr_size); | |
404 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); | |
405 | ||
406 | unsigned char e_ident[elfcpp::EI_NIDENT]; | |
407 | memset(e_ident, 0, elfcpp::EI_NIDENT); | |
408 | e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0; | |
409 | e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1; | |
410 | e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2; | |
411 | e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3; | |
412 | if (size == 32) | |
413 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32; | |
414 | else if (size == 64) | |
415 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64; | |
416 | else | |
a3ad94ed | 417 | gold_unreachable(); |
61ba1cf9 ILT |
418 | e_ident[elfcpp::EI_DATA] = (big_endian |
419 | ? elfcpp::ELFDATA2MSB | |
420 | : elfcpp::ELFDATA2LSB); | |
421 | e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; | |
422 | // FIXME: Some targets may need to set EI_OSABI and EI_ABIVERSION. | |
423 | oehdr.put_e_ident(e_ident); | |
424 | ||
425 | elfcpp::ET e_type; | |
8851ecca | 426 | if (parameters->options().relocatable()) |
61ba1cf9 | 427 | e_type = elfcpp::ET_REL; |
8851ecca | 428 | else if (parameters->options().shared()) |
436ca963 | 429 | e_type = elfcpp::ET_DYN; |
61ba1cf9 ILT |
430 | else |
431 | e_type = elfcpp::ET_EXEC; | |
432 | oehdr.put_e_type(e_type); | |
433 | ||
434 | oehdr.put_e_machine(this->target_->machine_code()); | |
435 | oehdr.put_e_version(elfcpp::EV_CURRENT); | |
436 | ||
d391083d | 437 | oehdr.put_e_entry(this->entry<size>()); |
61ba1cf9 | 438 | |
6a74a719 ILT |
439 | if (this->segment_header_ == NULL) |
440 | oehdr.put_e_phoff(0); | |
441 | else | |
442 | oehdr.put_e_phoff(this->segment_header_->offset()); | |
443 | ||
61ba1cf9 ILT |
444 | oehdr.put_e_shoff(this->section_header_->offset()); |
445 | ||
446 | // FIXME: The target needs to set the flags. | |
447 | oehdr.put_e_flags(0); | |
448 | ||
449 | oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size); | |
6a74a719 ILT |
450 | |
451 | if (this->segment_header_ == NULL) | |
452 | { | |
453 | oehdr.put_e_phentsize(0); | |
454 | oehdr.put_e_phnum(0); | |
455 | } | |
456 | else | |
457 | { | |
458 | oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size); | |
459 | oehdr.put_e_phnum(this->segment_header_->data_size() | |
460 | / elfcpp::Elf_sizes<size>::phdr_size); | |
461 | } | |
462 | ||
61ba1cf9 | 463 | oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size); |
d491d34e ILT |
464 | size_t section_count = (this->section_header_->data_size() |
465 | / elfcpp::Elf_sizes<size>::shdr_size); | |
466 | ||
467 | if (section_count < elfcpp::SHN_LORESERVE) | |
468 | oehdr.put_e_shnum(this->section_header_->data_size() | |
469 | / elfcpp::Elf_sizes<size>::shdr_size); | |
470 | else | |
471 | oehdr.put_e_shnum(0); | |
472 | ||
473 | unsigned int shstrndx = this->shstrtab_->out_shndx(); | |
474 | if (shstrndx < elfcpp::SHN_LORESERVE) | |
475 | oehdr.put_e_shstrndx(this->shstrtab_->out_shndx()); | |
476 | else | |
477 | oehdr.put_e_shstrndx(elfcpp::SHN_XINDEX); | |
61ba1cf9 ILT |
478 | |
479 | of->write_output_view(0, ehdr_size, view); | |
54dc6425 ILT |
480 | } |
481 | ||
d391083d ILT |
482 | // Return the value to use for the entry address. THIS->ENTRY_ is the |
483 | // symbol specified on the command line, if any. | |
484 | ||
485 | template<int size> | |
486 | typename elfcpp::Elf_types<size>::Elf_Addr | |
487 | Output_file_header::entry() | |
488 | { | |
489 | const bool should_issue_warning = (this->entry_ != NULL | |
8851ecca ILT |
490 | && !parameters->options().relocatable() |
491 | && !parameters->options().shared()); | |
d391083d ILT |
492 | |
493 | // FIXME: Need to support target specific entry symbol. | |
494 | const char* entry = this->entry_; | |
495 | if (entry == NULL) | |
496 | entry = "_start"; | |
497 | ||
498 | Symbol* sym = this->symtab_->lookup(entry); | |
499 | ||
500 | typename Sized_symbol<size>::Value_type v; | |
501 | if (sym != NULL) | |
502 | { | |
503 | Sized_symbol<size>* ssym; | |
504 | ssym = this->symtab_->get_sized_symbol<size>(sym); | |
505 | if (!ssym->is_defined() && should_issue_warning) | |
506 | gold_warning("entry symbol '%s' exists but is not defined", entry); | |
507 | v = ssym->value(); | |
508 | } | |
509 | else | |
510 | { | |
511 | // We couldn't find the entry symbol. See if we can parse it as | |
512 | // a number. This supports, e.g., -e 0x1000. | |
513 | char* endptr; | |
514 | v = strtoull(entry, &endptr, 0); | |
515 | if (*endptr != '\0') | |
516 | { | |
517 | if (should_issue_warning) | |
518 | gold_warning("cannot find entry symbol '%s'", entry); | |
519 | v = 0; | |
520 | } | |
521 | } | |
522 | ||
523 | return v; | |
524 | } | |
525 | ||
dbe717ef ILT |
526 | // Output_data_const methods. |
527 | ||
528 | void | |
a3ad94ed | 529 | Output_data_const::do_write(Output_file* of) |
dbe717ef | 530 | { |
a3ad94ed ILT |
531 | of->write(this->offset(), this->data_.data(), this->data_.size()); |
532 | } | |
533 | ||
534 | // Output_data_const_buffer methods. | |
535 | ||
536 | void | |
537 | Output_data_const_buffer::do_write(Output_file* of) | |
538 | { | |
539 | of->write(this->offset(), this->p_, this->data_size()); | |
dbe717ef ILT |
540 | } |
541 | ||
542 | // Output_section_data methods. | |
543 | ||
16649710 ILT |
544 | // Record the output section, and set the entry size and such. |
545 | ||
546 | void | |
547 | Output_section_data::set_output_section(Output_section* os) | |
548 | { | |
549 | gold_assert(this->output_section_ == NULL); | |
550 | this->output_section_ = os; | |
551 | this->do_adjust_output_section(os); | |
552 | } | |
553 | ||
554 | // Return the section index of the output section. | |
555 | ||
dbe717ef ILT |
556 | unsigned int |
557 | Output_section_data::do_out_shndx() const | |
558 | { | |
a3ad94ed | 559 | gold_assert(this->output_section_ != NULL); |
dbe717ef ILT |
560 | return this->output_section_->out_shndx(); |
561 | } | |
562 | ||
759b1a24 ILT |
563 | // Set the alignment, which means we may need to update the alignment |
564 | // of the output section. | |
565 | ||
566 | void | |
567 | Output_section_data::set_addralign(uint64_t addralign) | |
568 | { | |
569 | this->addralign_ = addralign; | |
570 | if (this->output_section_ != NULL | |
571 | && this->output_section_->addralign() < addralign) | |
572 | this->output_section_->set_addralign(addralign); | |
573 | } | |
574 | ||
a3ad94ed ILT |
575 | // Output_data_strtab methods. |
576 | ||
27bc2bce | 577 | // Set the final data size. |
a3ad94ed ILT |
578 | |
579 | void | |
27bc2bce | 580 | Output_data_strtab::set_final_data_size() |
a3ad94ed ILT |
581 | { |
582 | this->strtab_->set_string_offsets(); | |
583 | this->set_data_size(this->strtab_->get_strtab_size()); | |
584 | } | |
585 | ||
586 | // Write out a string table. | |
587 | ||
588 | void | |
589 | Output_data_strtab::do_write(Output_file* of) | |
590 | { | |
591 | this->strtab_->write(of, this->offset()); | |
592 | } | |
593 | ||
c06b7b0b ILT |
594 | // Output_reloc methods. |
595 | ||
7bf1f802 ILT |
596 | // A reloc against a global symbol. |
597 | ||
598 | template<bool dynamic, int size, bool big_endian> | |
599 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
600 | Symbol* gsym, | |
601 | unsigned int type, | |
602 | Output_data* od, | |
e8c846c3 ILT |
603 | Address address, |
604 | bool is_relative) | |
7bf1f802 | 605 | : address_(address), local_sym_index_(GSYM_CODE), type_(type), |
dceae3c1 | 606 | is_relative_(is_relative), is_section_symbol_(false), shndx_(INVALID_CODE) |
7bf1f802 | 607 | { |
dceae3c1 ILT |
608 | // this->type_ is a bitfield; make sure TYPE fits. |
609 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
610 | this->u1_.gsym = gsym; |
611 | this->u2_.od = od; | |
dceae3c1 ILT |
612 | if (dynamic) |
613 | this->set_needs_dynsym_index(); | |
7bf1f802 ILT |
614 | } |
615 | ||
616 | template<bool dynamic, int size, bool big_endian> | |
617 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
618 | Symbol* gsym, | |
619 | unsigned int type, | |
620 | Relobj* relobj, | |
621 | unsigned int shndx, | |
e8c846c3 ILT |
622 | Address address, |
623 | bool is_relative) | |
7bf1f802 | 624 | : address_(address), local_sym_index_(GSYM_CODE), type_(type), |
dceae3c1 | 625 | is_relative_(is_relative), is_section_symbol_(false), shndx_(shndx) |
7bf1f802 ILT |
626 | { |
627 | gold_assert(shndx != INVALID_CODE); | |
dceae3c1 ILT |
628 | // this->type_ is a bitfield; make sure TYPE fits. |
629 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
630 | this->u1_.gsym = gsym; |
631 | this->u2_.relobj = relobj; | |
dceae3c1 ILT |
632 | if (dynamic) |
633 | this->set_needs_dynsym_index(); | |
7bf1f802 ILT |
634 | } |
635 | ||
636 | // A reloc against a local symbol. | |
637 | ||
638 | template<bool dynamic, int size, bool big_endian> | |
639 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
640 | Sized_relobj<size, big_endian>* relobj, | |
641 | unsigned int local_sym_index, | |
642 | unsigned int type, | |
643 | Output_data* od, | |
e8c846c3 | 644 | Address address, |
dceae3c1 ILT |
645 | bool is_relative, |
646 | bool is_section_symbol) | |
7bf1f802 | 647 | : address_(address), local_sym_index_(local_sym_index), type_(type), |
dceae3c1 ILT |
648 | is_relative_(is_relative), is_section_symbol_(is_section_symbol), |
649 | shndx_(INVALID_CODE) | |
7bf1f802 ILT |
650 | { |
651 | gold_assert(local_sym_index != GSYM_CODE | |
652 | && local_sym_index != INVALID_CODE); | |
dceae3c1 ILT |
653 | // this->type_ is a bitfield; make sure TYPE fits. |
654 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
655 | this->u1_.relobj = relobj; |
656 | this->u2_.od = od; | |
dceae3c1 ILT |
657 | if (dynamic) |
658 | this->set_needs_dynsym_index(); | |
7bf1f802 ILT |
659 | } |
660 | ||
661 | template<bool dynamic, int size, bool big_endian> | |
662 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
663 | Sized_relobj<size, big_endian>* relobj, | |
664 | unsigned int local_sym_index, | |
665 | unsigned int type, | |
666 | unsigned int shndx, | |
e8c846c3 | 667 | Address address, |
dceae3c1 ILT |
668 | bool is_relative, |
669 | bool is_section_symbol) | |
7bf1f802 | 670 | : address_(address), local_sym_index_(local_sym_index), type_(type), |
dceae3c1 ILT |
671 | is_relative_(is_relative), is_section_symbol_(is_section_symbol), |
672 | shndx_(shndx) | |
7bf1f802 ILT |
673 | { |
674 | gold_assert(local_sym_index != GSYM_CODE | |
675 | && local_sym_index != INVALID_CODE); | |
676 | gold_assert(shndx != INVALID_CODE); | |
dceae3c1 ILT |
677 | // this->type_ is a bitfield; make sure TYPE fits. |
678 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
679 | this->u1_.relobj = relobj; |
680 | this->u2_.relobj = relobj; | |
dceae3c1 ILT |
681 | if (dynamic) |
682 | this->set_needs_dynsym_index(); | |
7bf1f802 ILT |
683 | } |
684 | ||
685 | // A reloc against the STT_SECTION symbol of an output section. | |
686 | ||
687 | template<bool dynamic, int size, bool big_endian> | |
688 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
689 | Output_section* os, | |
690 | unsigned int type, | |
691 | Output_data* od, | |
692 | Address address) | |
693 | : address_(address), local_sym_index_(SECTION_CODE), type_(type), | |
dceae3c1 | 694 | is_relative_(false), is_section_symbol_(true), shndx_(INVALID_CODE) |
7bf1f802 | 695 | { |
dceae3c1 ILT |
696 | // this->type_ is a bitfield; make sure TYPE fits. |
697 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
698 | this->u1_.os = os; |
699 | this->u2_.od = od; | |
700 | if (dynamic) | |
dceae3c1 ILT |
701 | this->set_needs_dynsym_index(); |
702 | else | |
703 | os->set_needs_symtab_index(); | |
7bf1f802 ILT |
704 | } |
705 | ||
706 | template<bool dynamic, int size, bool big_endian> | |
707 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
708 | Output_section* os, | |
709 | unsigned int type, | |
710 | Relobj* relobj, | |
711 | unsigned int shndx, | |
712 | Address address) | |
713 | : address_(address), local_sym_index_(SECTION_CODE), type_(type), | |
dceae3c1 | 714 | is_relative_(false), is_section_symbol_(true), shndx_(shndx) |
7bf1f802 ILT |
715 | { |
716 | gold_assert(shndx != INVALID_CODE); | |
dceae3c1 ILT |
717 | // this->type_ is a bitfield; make sure TYPE fits. |
718 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
719 | this->u1_.os = os; |
720 | this->u2_.relobj = relobj; | |
721 | if (dynamic) | |
dceae3c1 ILT |
722 | this->set_needs_dynsym_index(); |
723 | else | |
724 | os->set_needs_symtab_index(); | |
725 | } | |
726 | ||
727 | // Record that we need a dynamic symbol index for this relocation. | |
728 | ||
729 | template<bool dynamic, int size, bool big_endian> | |
730 | void | |
731 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>:: | |
732 | set_needs_dynsym_index() | |
733 | { | |
734 | if (this->is_relative_) | |
735 | return; | |
736 | switch (this->local_sym_index_) | |
737 | { | |
738 | case INVALID_CODE: | |
739 | gold_unreachable(); | |
740 | ||
741 | case GSYM_CODE: | |
742 | this->u1_.gsym->set_needs_dynsym_entry(); | |
743 | break; | |
744 | ||
745 | case SECTION_CODE: | |
746 | this->u1_.os->set_needs_dynsym_index(); | |
747 | break; | |
748 | ||
749 | case 0: | |
750 | break; | |
751 | ||
752 | default: | |
753 | { | |
754 | const unsigned int lsi = this->local_sym_index_; | |
755 | if (!this->is_section_symbol_) | |
756 | this->u1_.relobj->set_needs_output_dynsym_entry(lsi); | |
757 | else | |
758 | { | |
759 | section_offset_type dummy; | |
760 | Output_section* os = this->u1_.relobj->output_section(lsi, &dummy); | |
761 | gold_assert(os != NULL); | |
762 | os->set_needs_dynsym_index(); | |
763 | } | |
764 | } | |
765 | break; | |
766 | } | |
7bf1f802 ILT |
767 | } |
768 | ||
c06b7b0b ILT |
769 | // Get the symbol index of a relocation. |
770 | ||
771 | template<bool dynamic, int size, bool big_endian> | |
772 | unsigned int | |
773 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index() | |
774 | const | |
775 | { | |
776 | unsigned int index; | |
777 | switch (this->local_sym_index_) | |
778 | { | |
779 | case INVALID_CODE: | |
a3ad94ed | 780 | gold_unreachable(); |
c06b7b0b ILT |
781 | |
782 | case GSYM_CODE: | |
5a6f7e2d | 783 | if (this->u1_.gsym == NULL) |
c06b7b0b ILT |
784 | index = 0; |
785 | else if (dynamic) | |
5a6f7e2d | 786 | index = this->u1_.gsym->dynsym_index(); |
c06b7b0b | 787 | else |
5a6f7e2d | 788 | index = this->u1_.gsym->symtab_index(); |
c06b7b0b ILT |
789 | break; |
790 | ||
791 | case SECTION_CODE: | |
792 | if (dynamic) | |
5a6f7e2d | 793 | index = this->u1_.os->dynsym_index(); |
c06b7b0b | 794 | else |
5a6f7e2d | 795 | index = this->u1_.os->symtab_index(); |
c06b7b0b ILT |
796 | break; |
797 | ||
436ca963 ILT |
798 | case 0: |
799 | // Relocations without symbols use a symbol index of 0. | |
800 | index = 0; | |
801 | break; | |
802 | ||
c06b7b0b | 803 | default: |
dceae3c1 ILT |
804 | { |
805 | const unsigned int lsi = this->local_sym_index_; | |
806 | if (!this->is_section_symbol_) | |
807 | { | |
808 | if (dynamic) | |
809 | index = this->u1_.relobj->dynsym_index(lsi); | |
810 | else | |
811 | index = this->u1_.relobj->symtab_index(lsi); | |
812 | } | |
813 | else | |
814 | { | |
815 | section_offset_type dummy; | |
816 | Output_section* os = this->u1_.relobj->output_section(lsi, &dummy); | |
817 | gold_assert(os != NULL); | |
818 | if (dynamic) | |
819 | index = os->dynsym_index(); | |
820 | else | |
821 | index = os->symtab_index(); | |
822 | } | |
823 | } | |
c06b7b0b ILT |
824 | break; |
825 | } | |
a3ad94ed | 826 | gold_assert(index != -1U); |
c06b7b0b ILT |
827 | return index; |
828 | } | |
829 | ||
624f8810 ILT |
830 | // For a local section symbol, get the address of the offset ADDEND |
831 | // within the input section. | |
dceae3c1 ILT |
832 | |
833 | template<bool dynamic, int size, bool big_endian> | |
834 | section_offset_type | |
835 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>:: | |
624f8810 | 836 | local_section_offset(Addend addend) const |
dceae3c1 | 837 | { |
624f8810 ILT |
838 | gold_assert(this->local_sym_index_ != GSYM_CODE |
839 | && this->local_sym_index_ != SECTION_CODE | |
840 | && this->local_sym_index_ != INVALID_CODE | |
841 | && this->is_section_symbol_); | |
dceae3c1 ILT |
842 | const unsigned int lsi = this->local_sym_index_; |
843 | section_offset_type offset; | |
844 | Output_section* os = this->u1_.relobj->output_section(lsi, &offset); | |
624f8810 ILT |
845 | gold_assert(os != NULL); |
846 | if (offset != -1) | |
847 | return offset + addend; | |
848 | // This is a merge section. | |
849 | offset = os->output_address(this->u1_.relobj, lsi, addend); | |
850 | gold_assert(offset != -1); | |
dceae3c1 ILT |
851 | return offset; |
852 | } | |
853 | ||
d98bc257 | 854 | // Get the output address of a relocation. |
c06b7b0b ILT |
855 | |
856 | template<bool dynamic, int size, bool big_endian> | |
d98bc257 ILT |
857 | section_offset_type |
858 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_address() const | |
c06b7b0b | 859 | { |
a3ad94ed | 860 | Address address = this->address_; |
5a6f7e2d ILT |
861 | if (this->shndx_ != INVALID_CODE) |
862 | { | |
8383303e | 863 | section_offset_type off; |
5a6f7e2d ILT |
864 | Output_section* os = this->u2_.relobj->output_section(this->shndx_, |
865 | &off); | |
866 | gold_assert(os != NULL); | |
730cdc88 ILT |
867 | if (off != -1) |
868 | address += os->address() + off; | |
869 | else | |
870 | { | |
871 | address = os->output_address(this->u2_.relobj, this->shndx_, | |
872 | address); | |
873 | gold_assert(address != -1U); | |
874 | } | |
5a6f7e2d ILT |
875 | } |
876 | else if (this->u2_.od != NULL) | |
877 | address += this->u2_.od->address(); | |
d98bc257 ILT |
878 | return address; |
879 | } | |
880 | ||
881 | // Write out the offset and info fields of a Rel or Rela relocation | |
882 | // entry. | |
883 | ||
884 | template<bool dynamic, int size, bool big_endian> | |
885 | template<typename Write_rel> | |
886 | void | |
887 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel( | |
888 | Write_rel* wr) const | |
889 | { | |
890 | wr->put_r_offset(this->get_address()); | |
e8c846c3 ILT |
891 | unsigned int sym_index = this->is_relative_ ? 0 : this->get_symbol_index(); |
892 | wr->put_r_info(elfcpp::elf_r_info<size>(sym_index, this->type_)); | |
c06b7b0b ILT |
893 | } |
894 | ||
895 | // Write out a Rel relocation. | |
896 | ||
897 | template<bool dynamic, int size, bool big_endian> | |
898 | void | |
899 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write( | |
900 | unsigned char* pov) const | |
901 | { | |
902 | elfcpp::Rel_write<size, big_endian> orel(pov); | |
903 | this->write_rel(&orel); | |
904 | } | |
905 | ||
e8c846c3 ILT |
906 | // Get the value of the symbol referred to by a Rel relocation. |
907 | ||
908 | template<bool dynamic, int size, bool big_endian> | |
909 | typename elfcpp::Elf_types<size>::Elf_Addr | |
d1f003c6 | 910 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::symbol_value( |
624f8810 | 911 | Addend addend) const |
e8c846c3 ILT |
912 | { |
913 | if (this->local_sym_index_ == GSYM_CODE) | |
914 | { | |
915 | const Sized_symbol<size>* sym; | |
916 | sym = static_cast<const Sized_symbol<size>*>(this->u1_.gsym); | |
d1f003c6 | 917 | return sym->value() + addend; |
e8c846c3 ILT |
918 | } |
919 | gold_assert(this->local_sym_index_ != SECTION_CODE | |
d1f003c6 ILT |
920 | && this->local_sym_index_ != INVALID_CODE |
921 | && !this->is_section_symbol_); | |
922 | const unsigned int lsi = this->local_sym_index_; | |
923 | const Symbol_value<size>* symval = this->u1_.relobj->local_symbol(lsi); | |
924 | return symval->value(this->u1_.relobj, addend); | |
e8c846c3 ILT |
925 | } |
926 | ||
d98bc257 ILT |
927 | // Reloc comparison. This function sorts the dynamic relocs for the |
928 | // benefit of the dynamic linker. First we sort all relative relocs | |
929 | // to the front. Among relative relocs, we sort by output address. | |
930 | // Among non-relative relocs, we sort by symbol index, then by output | |
931 | // address. | |
932 | ||
933 | template<bool dynamic, int size, bool big_endian> | |
934 | int | |
935 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>:: | |
936 | compare(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& r2) | |
937 | const | |
938 | { | |
939 | if (this->is_relative_) | |
940 | { | |
941 | if (!r2.is_relative_) | |
942 | return -1; | |
943 | // Otherwise sort by reloc address below. | |
944 | } | |
945 | else if (r2.is_relative_) | |
946 | return 1; | |
947 | else | |
948 | { | |
949 | unsigned int sym1 = this->get_symbol_index(); | |
950 | unsigned int sym2 = r2.get_symbol_index(); | |
951 | if (sym1 < sym2) | |
952 | return -1; | |
953 | else if (sym1 > sym2) | |
954 | return 1; | |
955 | // Otherwise sort by reloc address. | |
956 | } | |
957 | ||
958 | section_offset_type addr1 = this->get_address(); | |
959 | section_offset_type addr2 = r2.get_address(); | |
960 | if (addr1 < addr2) | |
961 | return -1; | |
962 | else if (addr1 > addr2) | |
963 | return 1; | |
964 | ||
965 | // Final tie breaker, in order to generate the same output on any | |
966 | // host: reloc type. | |
967 | unsigned int type1 = this->type_; | |
968 | unsigned int type2 = r2.type_; | |
969 | if (type1 < type2) | |
970 | return -1; | |
971 | else if (type1 > type2) | |
972 | return 1; | |
973 | ||
974 | // These relocs appear to be exactly the same. | |
975 | return 0; | |
976 | } | |
977 | ||
c06b7b0b ILT |
978 | // Write out a Rela relocation. |
979 | ||
980 | template<bool dynamic, int size, bool big_endian> | |
981 | void | |
982 | Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write( | |
983 | unsigned char* pov) const | |
984 | { | |
985 | elfcpp::Rela_write<size, big_endian> orel(pov); | |
986 | this->rel_.write_rel(&orel); | |
e8c846c3 | 987 | Addend addend = this->addend_; |
dceae3c1 | 988 | if (this->rel_.is_relative()) |
d1f003c6 ILT |
989 | addend = this->rel_.symbol_value(addend); |
990 | else if (this->rel_.is_local_section_symbol()) | |
624f8810 | 991 | addend = this->rel_.local_section_offset(addend); |
e8c846c3 | 992 | orel.put_r_addend(addend); |
c06b7b0b ILT |
993 | } |
994 | ||
995 | // Output_data_reloc_base methods. | |
996 | ||
16649710 ILT |
997 | // Adjust the output section. |
998 | ||
999 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
1000 | void | |
1001 | Output_data_reloc_base<sh_type, dynamic, size, big_endian> | |
1002 | ::do_adjust_output_section(Output_section* os) | |
1003 | { | |
1004 | if (sh_type == elfcpp::SHT_REL) | |
1005 | os->set_entsize(elfcpp::Elf_sizes<size>::rel_size); | |
1006 | else if (sh_type == elfcpp::SHT_RELA) | |
1007 | os->set_entsize(elfcpp::Elf_sizes<size>::rela_size); | |
1008 | else | |
1009 | gold_unreachable(); | |
1010 | if (dynamic) | |
1011 | os->set_should_link_to_dynsym(); | |
1012 | else | |
1013 | os->set_should_link_to_symtab(); | |
1014 | } | |
1015 | ||
c06b7b0b ILT |
1016 | // Write out relocation data. |
1017 | ||
1018 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
1019 | void | |
1020 | Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write( | |
1021 | Output_file* of) | |
1022 | { | |
1023 | const off_t off = this->offset(); | |
1024 | const off_t oview_size = this->data_size(); | |
1025 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
1026 | ||
d98bc257 ILT |
1027 | if (this->sort_relocs_) |
1028 | { | |
1029 | gold_assert(dynamic); | |
1030 | std::sort(this->relocs_.begin(), this->relocs_.end(), | |
1031 | Sort_relocs_comparison()); | |
1032 | } | |
1033 | ||
c06b7b0b ILT |
1034 | unsigned char* pov = oview; |
1035 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
1036 | p != this->relocs_.end(); | |
1037 | ++p) | |
1038 | { | |
1039 | p->write(pov); | |
1040 | pov += reloc_size; | |
1041 | } | |
1042 | ||
a3ad94ed | 1043 | gold_assert(pov - oview == oview_size); |
c06b7b0b ILT |
1044 | |
1045 | of->write_output_view(off, oview_size, oview); | |
1046 | ||
1047 | // We no longer need the relocation entries. | |
1048 | this->relocs_.clear(); | |
1049 | } | |
1050 | ||
6a74a719 ILT |
1051 | // Class Output_relocatable_relocs. |
1052 | ||
1053 | template<int sh_type, int size, bool big_endian> | |
1054 | void | |
1055 | Output_relocatable_relocs<sh_type, size, big_endian>::set_final_data_size() | |
1056 | { | |
1057 | this->set_data_size(this->rr_->output_reloc_count() | |
1058 | * Reloc_types<sh_type, size, big_endian>::reloc_size); | |
1059 | } | |
1060 | ||
1061 | // class Output_data_group. | |
1062 | ||
1063 | template<int size, bool big_endian> | |
1064 | Output_data_group<size, big_endian>::Output_data_group( | |
1065 | Sized_relobj<size, big_endian>* relobj, | |
1066 | section_size_type entry_count, | |
8825ac63 ILT |
1067 | elfcpp::Elf_Word flags, |
1068 | std::vector<unsigned int>* input_shndxes) | |
6a74a719 | 1069 | : Output_section_data(entry_count * 4, 4), |
8825ac63 ILT |
1070 | relobj_(relobj), |
1071 | flags_(flags) | |
6a74a719 | 1072 | { |
8825ac63 | 1073 | this->input_shndxes_.swap(*input_shndxes); |
6a74a719 ILT |
1074 | } |
1075 | ||
1076 | // Write out the section group, which means translating the section | |
1077 | // indexes to apply to the output file. | |
1078 | ||
1079 | template<int size, bool big_endian> | |
1080 | void | |
1081 | Output_data_group<size, big_endian>::do_write(Output_file* of) | |
1082 | { | |
1083 | const off_t off = this->offset(); | |
1084 | const section_size_type oview_size = | |
1085 | convert_to_section_size_type(this->data_size()); | |
1086 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
1087 | ||
1088 | elfcpp::Elf_Word* contents = reinterpret_cast<elfcpp::Elf_Word*>(oview); | |
1089 | elfcpp::Swap<32, big_endian>::writeval(contents, this->flags_); | |
1090 | ++contents; | |
1091 | ||
1092 | for (std::vector<unsigned int>::const_iterator p = | |
8825ac63 ILT |
1093 | this->input_shndxes_.begin(); |
1094 | p != this->input_shndxes_.end(); | |
6a74a719 ILT |
1095 | ++p, ++contents) |
1096 | { | |
1097 | section_offset_type dummy; | |
1098 | Output_section* os = this->relobj_->output_section(*p, &dummy); | |
1099 | ||
1100 | unsigned int output_shndx; | |
1101 | if (os != NULL) | |
1102 | output_shndx = os->out_shndx(); | |
1103 | else | |
1104 | { | |
1105 | this->relobj_->error(_("section group retained but " | |
1106 | "group element discarded")); | |
1107 | output_shndx = 0; | |
1108 | } | |
1109 | ||
1110 | elfcpp::Swap<32, big_endian>::writeval(contents, output_shndx); | |
1111 | } | |
1112 | ||
1113 | size_t wrote = reinterpret_cast<unsigned char*>(contents) - oview; | |
1114 | gold_assert(wrote == oview_size); | |
1115 | ||
1116 | of->write_output_view(off, oview_size, oview); | |
1117 | ||
1118 | // We no longer need this information. | |
8825ac63 | 1119 | this->input_shndxes_.clear(); |
6a74a719 ILT |
1120 | } |
1121 | ||
dbe717ef | 1122 | // Output_data_got::Got_entry methods. |
ead1e424 ILT |
1123 | |
1124 | // Write out the entry. | |
1125 | ||
1126 | template<int size, bool big_endian> | |
1127 | void | |
7e1edb90 | 1128 | Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const |
ead1e424 ILT |
1129 | { |
1130 | Valtype val = 0; | |
1131 | ||
1132 | switch (this->local_sym_index_) | |
1133 | { | |
1134 | case GSYM_CODE: | |
1135 | { | |
e8c846c3 ILT |
1136 | // If the symbol is resolved locally, we need to write out the |
1137 | // link-time value, which will be relocated dynamically by a | |
1138 | // RELATIVE relocation. | |
ead1e424 | 1139 | Symbol* gsym = this->u_.gsym; |
e8c846c3 ILT |
1140 | Sized_symbol<size>* sgsym; |
1141 | // This cast is a bit ugly. We don't want to put a | |
1142 | // virtual method in Symbol, because we want Symbol to be | |
1143 | // as small as possible. | |
1144 | sgsym = static_cast<Sized_symbol<size>*>(gsym); | |
1145 | val = sgsym->value(); | |
ead1e424 ILT |
1146 | } |
1147 | break; | |
1148 | ||
1149 | case CONSTANT_CODE: | |
1150 | val = this->u_.constant; | |
1151 | break; | |
1152 | ||
1153 | default: | |
d1f003c6 ILT |
1154 | { |
1155 | const unsigned int lsi = this->local_sym_index_; | |
1156 | const Symbol_value<size>* symval = this->u_.object->local_symbol(lsi); | |
1157 | val = symval->value(this->u_.object, 0); | |
1158 | } | |
e727fa71 | 1159 | break; |
ead1e424 ILT |
1160 | } |
1161 | ||
a3ad94ed | 1162 | elfcpp::Swap<size, big_endian>::writeval(pov, val); |
ead1e424 ILT |
1163 | } |
1164 | ||
dbe717ef | 1165 | // Output_data_got methods. |
ead1e424 | 1166 | |
dbe717ef ILT |
1167 | // Add an entry for a global symbol to the GOT. This returns true if |
1168 | // this is a new GOT entry, false if the symbol already had a GOT | |
1169 | // entry. | |
1170 | ||
1171 | template<int size, bool big_endian> | |
1172 | bool | |
0a65a3a7 CC |
1173 | Output_data_got<size, big_endian>::add_global( |
1174 | Symbol* gsym, | |
1175 | unsigned int got_type) | |
ead1e424 | 1176 | { |
0a65a3a7 | 1177 | if (gsym->has_got_offset(got_type)) |
dbe717ef | 1178 | return false; |
ead1e424 | 1179 | |
dbe717ef ILT |
1180 | this->entries_.push_back(Got_entry(gsym)); |
1181 | this->set_got_size(); | |
0a65a3a7 | 1182 | gsym->set_got_offset(got_type, this->last_got_offset()); |
dbe717ef ILT |
1183 | return true; |
1184 | } | |
ead1e424 | 1185 | |
7bf1f802 ILT |
1186 | // Add an entry for a global symbol to the GOT, and add a dynamic |
1187 | // relocation of type R_TYPE for the GOT entry. | |
1188 | template<int size, bool big_endian> | |
1189 | void | |
1190 | Output_data_got<size, big_endian>::add_global_with_rel( | |
1191 | Symbol* gsym, | |
0a65a3a7 | 1192 | unsigned int got_type, |
7bf1f802 ILT |
1193 | Rel_dyn* rel_dyn, |
1194 | unsigned int r_type) | |
1195 | { | |
0a65a3a7 | 1196 | if (gsym->has_got_offset(got_type)) |
7bf1f802 ILT |
1197 | return; |
1198 | ||
1199 | this->entries_.push_back(Got_entry()); | |
1200 | this->set_got_size(); | |
1201 | unsigned int got_offset = this->last_got_offset(); | |
0a65a3a7 | 1202 | gsym->set_got_offset(got_type, got_offset); |
7bf1f802 ILT |
1203 | rel_dyn->add_global(gsym, r_type, this, got_offset); |
1204 | } | |
1205 | ||
1206 | template<int size, bool big_endian> | |
1207 | void | |
1208 | Output_data_got<size, big_endian>::add_global_with_rela( | |
1209 | Symbol* gsym, | |
0a65a3a7 | 1210 | unsigned int got_type, |
7bf1f802 ILT |
1211 | Rela_dyn* rela_dyn, |
1212 | unsigned int r_type) | |
1213 | { | |
0a65a3a7 | 1214 | if (gsym->has_got_offset(got_type)) |
7bf1f802 ILT |
1215 | return; |
1216 | ||
1217 | this->entries_.push_back(Got_entry()); | |
1218 | this->set_got_size(); | |
1219 | unsigned int got_offset = this->last_got_offset(); | |
0a65a3a7 | 1220 | gsym->set_got_offset(got_type, got_offset); |
7bf1f802 ILT |
1221 | rela_dyn->add_global(gsym, r_type, this, got_offset, 0); |
1222 | } | |
1223 | ||
0a65a3a7 CC |
1224 | // Add a pair of entries for a global symbol to the GOT, and add |
1225 | // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively. | |
1226 | // If R_TYPE_2 == 0, add the second entry with no relocation. | |
7bf1f802 ILT |
1227 | template<int size, bool big_endian> |
1228 | void | |
0a65a3a7 CC |
1229 | Output_data_got<size, big_endian>::add_global_pair_with_rel( |
1230 | Symbol* gsym, | |
1231 | unsigned int got_type, | |
7bf1f802 | 1232 | Rel_dyn* rel_dyn, |
0a65a3a7 CC |
1233 | unsigned int r_type_1, |
1234 | unsigned int r_type_2) | |
7bf1f802 | 1235 | { |
0a65a3a7 | 1236 | if (gsym->has_got_offset(got_type)) |
7bf1f802 ILT |
1237 | return; |
1238 | ||
1239 | this->entries_.push_back(Got_entry()); | |
7bf1f802 | 1240 | unsigned int got_offset = this->last_got_offset(); |
0a65a3a7 CC |
1241 | gsym->set_got_offset(got_type, got_offset); |
1242 | rel_dyn->add_global(gsym, r_type_1, this, got_offset); | |
1243 | ||
1244 | this->entries_.push_back(Got_entry()); | |
1245 | if (r_type_2 != 0) | |
1246 | { | |
1247 | got_offset = this->last_got_offset(); | |
1248 | rel_dyn->add_global(gsym, r_type_2, this, got_offset); | |
1249 | } | |
1250 | ||
1251 | this->set_got_size(); | |
7bf1f802 ILT |
1252 | } |
1253 | ||
1254 | template<int size, bool big_endian> | |
1255 | void | |
0a65a3a7 CC |
1256 | Output_data_got<size, big_endian>::add_global_pair_with_rela( |
1257 | Symbol* gsym, | |
1258 | unsigned int got_type, | |
7bf1f802 | 1259 | Rela_dyn* rela_dyn, |
0a65a3a7 CC |
1260 | unsigned int r_type_1, |
1261 | unsigned int r_type_2) | |
7bf1f802 | 1262 | { |
0a65a3a7 | 1263 | if (gsym->has_got_offset(got_type)) |
7bf1f802 ILT |
1264 | return; |
1265 | ||
1266 | this->entries_.push_back(Got_entry()); | |
7bf1f802 | 1267 | unsigned int got_offset = this->last_got_offset(); |
0a65a3a7 CC |
1268 | gsym->set_got_offset(got_type, got_offset); |
1269 | rela_dyn->add_global(gsym, r_type_1, this, got_offset, 0); | |
1270 | ||
1271 | this->entries_.push_back(Got_entry()); | |
1272 | if (r_type_2 != 0) | |
1273 | { | |
1274 | got_offset = this->last_got_offset(); | |
1275 | rela_dyn->add_global(gsym, r_type_2, this, got_offset, 0); | |
1276 | } | |
1277 | ||
1278 | this->set_got_size(); | |
7bf1f802 ILT |
1279 | } |
1280 | ||
0a65a3a7 CC |
1281 | // Add an entry for a local symbol to the GOT. This returns true if |
1282 | // this is a new GOT entry, false if the symbol already has a GOT | |
1283 | // entry. | |
07f397ab ILT |
1284 | |
1285 | template<int size, bool big_endian> | |
1286 | bool | |
0a65a3a7 CC |
1287 | Output_data_got<size, big_endian>::add_local( |
1288 | Sized_relobj<size, big_endian>* object, | |
1289 | unsigned int symndx, | |
1290 | unsigned int got_type) | |
07f397ab | 1291 | { |
0a65a3a7 | 1292 | if (object->local_has_got_offset(symndx, got_type)) |
07f397ab ILT |
1293 | return false; |
1294 | ||
0a65a3a7 | 1295 | this->entries_.push_back(Got_entry(object, symndx)); |
07f397ab | 1296 | this->set_got_size(); |
0a65a3a7 | 1297 | object->set_local_got_offset(symndx, got_type, this->last_got_offset()); |
07f397ab ILT |
1298 | return true; |
1299 | } | |
1300 | ||
0a65a3a7 CC |
1301 | // Add an entry for a local symbol to the GOT, and add a dynamic |
1302 | // relocation of type R_TYPE for the GOT entry. | |
7bf1f802 ILT |
1303 | template<int size, bool big_endian> |
1304 | void | |
0a65a3a7 CC |
1305 | Output_data_got<size, big_endian>::add_local_with_rel( |
1306 | Sized_relobj<size, big_endian>* object, | |
1307 | unsigned int symndx, | |
1308 | unsigned int got_type, | |
7bf1f802 ILT |
1309 | Rel_dyn* rel_dyn, |
1310 | unsigned int r_type) | |
1311 | { | |
0a65a3a7 | 1312 | if (object->local_has_got_offset(symndx, got_type)) |
7bf1f802 ILT |
1313 | return; |
1314 | ||
1315 | this->entries_.push_back(Got_entry()); | |
1316 | this->set_got_size(); | |
1317 | unsigned int got_offset = this->last_got_offset(); | |
0a65a3a7 CC |
1318 | object->set_local_got_offset(symndx, got_type, got_offset); |
1319 | rel_dyn->add_local(object, symndx, r_type, this, got_offset); | |
7bf1f802 ILT |
1320 | } |
1321 | ||
1322 | template<int size, bool big_endian> | |
1323 | void | |
0a65a3a7 CC |
1324 | Output_data_got<size, big_endian>::add_local_with_rela( |
1325 | Sized_relobj<size, big_endian>* object, | |
1326 | unsigned int symndx, | |
1327 | unsigned int got_type, | |
7bf1f802 ILT |
1328 | Rela_dyn* rela_dyn, |
1329 | unsigned int r_type) | |
1330 | { | |
0a65a3a7 | 1331 | if (object->local_has_got_offset(symndx, got_type)) |
7bf1f802 ILT |
1332 | return; |
1333 | ||
1334 | this->entries_.push_back(Got_entry()); | |
1335 | this->set_got_size(); | |
1336 | unsigned int got_offset = this->last_got_offset(); | |
0a65a3a7 CC |
1337 | object->set_local_got_offset(symndx, got_type, got_offset); |
1338 | rela_dyn->add_local(object, symndx, r_type, this, got_offset, 0); | |
07f397ab ILT |
1339 | } |
1340 | ||
0a65a3a7 CC |
1341 | // Add a pair of entries for a local symbol to the GOT, and add |
1342 | // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively. | |
1343 | // If R_TYPE_2 == 0, add the second entry with no relocation. | |
7bf1f802 ILT |
1344 | template<int size, bool big_endian> |
1345 | void | |
0a65a3a7 | 1346 | Output_data_got<size, big_endian>::add_local_pair_with_rel( |
7bf1f802 ILT |
1347 | Sized_relobj<size, big_endian>* object, |
1348 | unsigned int symndx, | |
1349 | unsigned int shndx, | |
0a65a3a7 | 1350 | unsigned int got_type, |
7bf1f802 | 1351 | Rel_dyn* rel_dyn, |
0a65a3a7 CC |
1352 | unsigned int r_type_1, |
1353 | unsigned int r_type_2) | |
7bf1f802 | 1354 | { |
0a65a3a7 | 1355 | if (object->local_has_got_offset(symndx, got_type)) |
7bf1f802 ILT |
1356 | return; |
1357 | ||
1358 | this->entries_.push_back(Got_entry()); | |
1359 | unsigned int got_offset = this->last_got_offset(); | |
0a65a3a7 | 1360 | object->set_local_got_offset(symndx, got_type, got_offset); |
8383303e | 1361 | section_offset_type off; |
7bf1f802 | 1362 | Output_section* os = object->output_section(shndx, &off); |
0a65a3a7 | 1363 | rel_dyn->add_output_section(os, r_type_1, this, got_offset); |
7bf1f802 | 1364 | |
0a65a3a7 CC |
1365 | this->entries_.push_back(Got_entry(object, symndx)); |
1366 | if (r_type_2 != 0) | |
1367 | { | |
1368 | got_offset = this->last_got_offset(); | |
1369 | rel_dyn->add_output_section(os, r_type_2, this, got_offset); | |
1370 | } | |
7bf1f802 ILT |
1371 | |
1372 | this->set_got_size(); | |
1373 | } | |
1374 | ||
1375 | template<int size, bool big_endian> | |
1376 | void | |
0a65a3a7 | 1377 | Output_data_got<size, big_endian>::add_local_pair_with_rela( |
7bf1f802 ILT |
1378 | Sized_relobj<size, big_endian>* object, |
1379 | unsigned int symndx, | |
1380 | unsigned int shndx, | |
0a65a3a7 | 1381 | unsigned int got_type, |
7bf1f802 | 1382 | Rela_dyn* rela_dyn, |
0a65a3a7 CC |
1383 | unsigned int r_type_1, |
1384 | unsigned int r_type_2) | |
7bf1f802 | 1385 | { |
0a65a3a7 | 1386 | if (object->local_has_got_offset(symndx, got_type)) |
7bf1f802 ILT |
1387 | return; |
1388 | ||
1389 | this->entries_.push_back(Got_entry()); | |
1390 | unsigned int got_offset = this->last_got_offset(); | |
0a65a3a7 | 1391 | object->set_local_got_offset(symndx, got_type, got_offset); |
8383303e | 1392 | section_offset_type off; |
7bf1f802 | 1393 | Output_section* os = object->output_section(shndx, &off); |
0a65a3a7 | 1394 | rela_dyn->add_output_section(os, r_type_1, this, got_offset, 0); |
7bf1f802 | 1395 | |
0a65a3a7 CC |
1396 | this->entries_.push_back(Got_entry(object, symndx)); |
1397 | if (r_type_2 != 0) | |
1398 | { | |
1399 | got_offset = this->last_got_offset(); | |
1400 | rela_dyn->add_output_section(os, r_type_2, this, got_offset, 0); | |
1401 | } | |
7bf1f802 ILT |
1402 | |
1403 | this->set_got_size(); | |
1404 | } | |
1405 | ||
ead1e424 ILT |
1406 | // Write out the GOT. |
1407 | ||
1408 | template<int size, bool big_endian> | |
1409 | void | |
dbe717ef | 1410 | Output_data_got<size, big_endian>::do_write(Output_file* of) |
ead1e424 ILT |
1411 | { |
1412 | const int add = size / 8; | |
1413 | ||
1414 | const off_t off = this->offset(); | |
c06b7b0b | 1415 | const off_t oview_size = this->data_size(); |
ead1e424 ILT |
1416 | unsigned char* const oview = of->get_output_view(off, oview_size); |
1417 | ||
1418 | unsigned char* pov = oview; | |
1419 | for (typename Got_entries::const_iterator p = this->entries_.begin(); | |
1420 | p != this->entries_.end(); | |
1421 | ++p) | |
1422 | { | |
7e1edb90 | 1423 | p->write(pov); |
ead1e424 ILT |
1424 | pov += add; |
1425 | } | |
1426 | ||
a3ad94ed | 1427 | gold_assert(pov - oview == oview_size); |
c06b7b0b | 1428 | |
ead1e424 ILT |
1429 | of->write_output_view(off, oview_size, oview); |
1430 | ||
1431 | // We no longer need the GOT entries. | |
1432 | this->entries_.clear(); | |
1433 | } | |
1434 | ||
a3ad94ed ILT |
1435 | // Output_data_dynamic::Dynamic_entry methods. |
1436 | ||
1437 | // Write out the entry. | |
1438 | ||
1439 | template<int size, bool big_endian> | |
1440 | void | |
1441 | Output_data_dynamic::Dynamic_entry::write( | |
1442 | unsigned char* pov, | |
7d1a9ebb | 1443 | const Stringpool* pool) const |
a3ad94ed ILT |
1444 | { |
1445 | typename elfcpp::Elf_types<size>::Elf_WXword val; | |
c2b45e22 | 1446 | switch (this->offset_) |
a3ad94ed ILT |
1447 | { |
1448 | case DYNAMIC_NUMBER: | |
1449 | val = this->u_.val; | |
1450 | break; | |
1451 | ||
a3ad94ed | 1452 | case DYNAMIC_SECTION_SIZE: |
16649710 | 1453 | val = this->u_.od->data_size(); |
a3ad94ed ILT |
1454 | break; |
1455 | ||
1456 | case DYNAMIC_SYMBOL: | |
1457 | { | |
16649710 ILT |
1458 | const Sized_symbol<size>* s = |
1459 | static_cast<const Sized_symbol<size>*>(this->u_.sym); | |
a3ad94ed ILT |
1460 | val = s->value(); |
1461 | } | |
1462 | break; | |
1463 | ||
1464 | case DYNAMIC_STRING: | |
1465 | val = pool->get_offset(this->u_.str); | |
1466 | break; | |
1467 | ||
1468 | default: | |
c2b45e22 CC |
1469 | val = this->u_.od->address() + this->offset_; |
1470 | break; | |
a3ad94ed ILT |
1471 | } |
1472 | ||
1473 | elfcpp::Dyn_write<size, big_endian> dw(pov); | |
1474 | dw.put_d_tag(this->tag_); | |
1475 | dw.put_d_val(val); | |
1476 | } | |
1477 | ||
1478 | // Output_data_dynamic methods. | |
1479 | ||
16649710 ILT |
1480 | // Adjust the output section to set the entry size. |
1481 | ||
1482 | void | |
1483 | Output_data_dynamic::do_adjust_output_section(Output_section* os) | |
1484 | { | |
8851ecca | 1485 | if (parameters->target().get_size() == 32) |
16649710 | 1486 | os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size); |
8851ecca | 1487 | else if (parameters->target().get_size() == 64) |
16649710 ILT |
1488 | os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size); |
1489 | else | |
1490 | gold_unreachable(); | |
1491 | } | |
1492 | ||
a3ad94ed ILT |
1493 | // Set the final data size. |
1494 | ||
1495 | void | |
27bc2bce | 1496 | Output_data_dynamic::set_final_data_size() |
a3ad94ed ILT |
1497 | { |
1498 | // Add the terminating entry. | |
1499 | this->add_constant(elfcpp::DT_NULL, 0); | |
1500 | ||
1501 | int dyn_size; | |
8851ecca | 1502 | if (parameters->target().get_size() == 32) |
a3ad94ed | 1503 | dyn_size = elfcpp::Elf_sizes<32>::dyn_size; |
8851ecca | 1504 | else if (parameters->target().get_size() == 64) |
a3ad94ed ILT |
1505 | dyn_size = elfcpp::Elf_sizes<64>::dyn_size; |
1506 | else | |
1507 | gold_unreachable(); | |
1508 | this->set_data_size(this->entries_.size() * dyn_size); | |
1509 | } | |
1510 | ||
1511 | // Write out the dynamic entries. | |
1512 | ||
1513 | void | |
1514 | Output_data_dynamic::do_write(Output_file* of) | |
1515 | { | |
8851ecca | 1516 | switch (parameters->size_and_endianness()) |
a3ad94ed | 1517 | { |
9025d29d | 1518 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca ILT |
1519 | case Parameters::TARGET_32_LITTLE: |
1520 | this->sized_write<32, false>(of); | |
1521 | break; | |
9025d29d | 1522 | #endif |
8851ecca ILT |
1523 | #ifdef HAVE_TARGET_32_BIG |
1524 | case Parameters::TARGET_32_BIG: | |
1525 | this->sized_write<32, true>(of); | |
1526 | break; | |
9025d29d | 1527 | #endif |
9025d29d | 1528 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca ILT |
1529 | case Parameters::TARGET_64_LITTLE: |
1530 | this->sized_write<64, false>(of); | |
1531 | break; | |
9025d29d | 1532 | #endif |
8851ecca ILT |
1533 | #ifdef HAVE_TARGET_64_BIG |
1534 | case Parameters::TARGET_64_BIG: | |
1535 | this->sized_write<64, true>(of); | |
1536 | break; | |
1537 | #endif | |
1538 | default: | |
1539 | gold_unreachable(); | |
a3ad94ed | 1540 | } |
a3ad94ed ILT |
1541 | } |
1542 | ||
1543 | template<int size, bool big_endian> | |
1544 | void | |
1545 | Output_data_dynamic::sized_write(Output_file* of) | |
1546 | { | |
1547 | const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
1548 | ||
1549 | const off_t offset = this->offset(); | |
1550 | const off_t oview_size = this->data_size(); | |
1551 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1552 | ||
1553 | unsigned char* pov = oview; | |
1554 | for (typename Dynamic_entries::const_iterator p = this->entries_.begin(); | |
1555 | p != this->entries_.end(); | |
1556 | ++p) | |
1557 | { | |
7d1a9ebb | 1558 | p->write<size, big_endian>(pov, this->pool_); |
a3ad94ed ILT |
1559 | pov += dyn_size; |
1560 | } | |
1561 | ||
1562 | gold_assert(pov - oview == oview_size); | |
1563 | ||
1564 | of->write_output_view(offset, oview_size, oview); | |
1565 | ||
1566 | // We no longer need the dynamic entries. | |
1567 | this->entries_.clear(); | |
1568 | } | |
1569 | ||
d491d34e ILT |
1570 | // Class Output_symtab_xindex. |
1571 | ||
1572 | void | |
1573 | Output_symtab_xindex::do_write(Output_file* of) | |
1574 | { | |
1575 | const off_t offset = this->offset(); | |
1576 | const off_t oview_size = this->data_size(); | |
1577 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1578 | ||
1579 | memset(oview, 0, oview_size); | |
1580 | ||
1581 | if (parameters->target().is_big_endian()) | |
1582 | this->endian_do_write<true>(oview); | |
1583 | else | |
1584 | this->endian_do_write<false>(oview); | |
1585 | ||
1586 | of->write_output_view(offset, oview_size, oview); | |
1587 | ||
1588 | // We no longer need the data. | |
1589 | this->entries_.clear(); | |
1590 | } | |
1591 | ||
1592 | template<bool big_endian> | |
1593 | void | |
1594 | Output_symtab_xindex::endian_do_write(unsigned char* const oview) | |
1595 | { | |
1596 | for (Xindex_entries::const_iterator p = this->entries_.begin(); | |
1597 | p != this->entries_.end(); | |
1598 | ++p) | |
1599 | elfcpp::Swap<32, big_endian>::writeval(oview + p->first * 4, p->second); | |
1600 | } | |
1601 | ||
ead1e424 ILT |
1602 | // Output_section::Input_section methods. |
1603 | ||
1604 | // Return the data size. For an input section we store the size here. | |
1605 | // For an Output_section_data, we have to ask it for the size. | |
1606 | ||
1607 | off_t | |
1608 | Output_section::Input_section::data_size() const | |
1609 | { | |
1610 | if (this->is_input_section()) | |
b8e6aad9 | 1611 | return this->u1_.data_size; |
ead1e424 | 1612 | else |
b8e6aad9 | 1613 | return this->u2_.posd->data_size(); |
ead1e424 ILT |
1614 | } |
1615 | ||
1616 | // Set the address and file offset. | |
1617 | ||
1618 | void | |
96803768 ILT |
1619 | Output_section::Input_section::set_address_and_file_offset( |
1620 | uint64_t address, | |
1621 | off_t file_offset, | |
1622 | off_t section_file_offset) | |
ead1e424 ILT |
1623 | { |
1624 | if (this->is_input_section()) | |
96803768 ILT |
1625 | this->u2_.object->set_section_offset(this->shndx_, |
1626 | file_offset - section_file_offset); | |
ead1e424 | 1627 | else |
96803768 ILT |
1628 | this->u2_.posd->set_address_and_file_offset(address, file_offset); |
1629 | } | |
1630 | ||
a445fddf ILT |
1631 | // Reset the address and file offset. |
1632 | ||
1633 | void | |
1634 | Output_section::Input_section::reset_address_and_file_offset() | |
1635 | { | |
1636 | if (!this->is_input_section()) | |
1637 | this->u2_.posd->reset_address_and_file_offset(); | |
1638 | } | |
1639 | ||
96803768 ILT |
1640 | // Finalize the data size. |
1641 | ||
1642 | void | |
1643 | Output_section::Input_section::finalize_data_size() | |
1644 | { | |
1645 | if (!this->is_input_section()) | |
1646 | this->u2_.posd->finalize_data_size(); | |
b8e6aad9 ILT |
1647 | } |
1648 | ||
1e983657 ILT |
1649 | // Try to turn an input offset into an output offset. We want to |
1650 | // return the output offset relative to the start of this | |
1651 | // Input_section in the output section. | |
b8e6aad9 | 1652 | |
8f00aeb8 | 1653 | inline bool |
8383303e ILT |
1654 | Output_section::Input_section::output_offset( |
1655 | const Relobj* object, | |
1656 | unsigned int shndx, | |
1657 | section_offset_type offset, | |
1658 | section_offset_type *poutput) const | |
b8e6aad9 ILT |
1659 | { |
1660 | if (!this->is_input_section()) | |
730cdc88 | 1661 | return this->u2_.posd->output_offset(object, shndx, offset, poutput); |
b8e6aad9 ILT |
1662 | else |
1663 | { | |
730cdc88 | 1664 | if (this->shndx_ != shndx || this->u2_.object != object) |
b8e6aad9 | 1665 | return false; |
1e983657 | 1666 | *poutput = offset; |
b8e6aad9 ILT |
1667 | return true; |
1668 | } | |
ead1e424 ILT |
1669 | } |
1670 | ||
a9a60db6 ILT |
1671 | // Return whether this is the merge section for the input section |
1672 | // SHNDX in OBJECT. | |
1673 | ||
1674 | inline bool | |
1675 | Output_section::Input_section::is_merge_section_for(const Relobj* object, | |
1676 | unsigned int shndx) const | |
1677 | { | |
1678 | if (this->is_input_section()) | |
1679 | return false; | |
1680 | return this->u2_.posd->is_merge_section_for(object, shndx); | |
1681 | } | |
1682 | ||
ead1e424 ILT |
1683 | // Write out the data. We don't have to do anything for an input |
1684 | // section--they are handled via Object::relocate--but this is where | |
1685 | // we write out the data for an Output_section_data. | |
1686 | ||
1687 | void | |
1688 | Output_section::Input_section::write(Output_file* of) | |
1689 | { | |
1690 | if (!this->is_input_section()) | |
b8e6aad9 | 1691 | this->u2_.posd->write(of); |
ead1e424 ILT |
1692 | } |
1693 | ||
96803768 ILT |
1694 | // Write the data to a buffer. As for write(), we don't have to do |
1695 | // anything for an input section. | |
1696 | ||
1697 | void | |
1698 | Output_section::Input_section::write_to_buffer(unsigned char* buffer) | |
1699 | { | |
1700 | if (!this->is_input_section()) | |
1701 | this->u2_.posd->write_to_buffer(buffer); | |
1702 | } | |
1703 | ||
a2fb1b05 ILT |
1704 | // Output_section methods. |
1705 | ||
1706 | // Construct an Output_section. NAME will point into a Stringpool. | |
1707 | ||
96803768 | 1708 | Output_section::Output_section(const char* name, elfcpp::Elf_Word type, |
b8e6aad9 | 1709 | elfcpp::Elf_Xword flags) |
96803768 | 1710 | : name_(name), |
a2fb1b05 ILT |
1711 | addralign_(0), |
1712 | entsize_(0), | |
a445fddf | 1713 | load_address_(0), |
16649710 | 1714 | link_section_(NULL), |
a2fb1b05 | 1715 | link_(0), |
16649710 | 1716 | info_section_(NULL), |
6a74a719 | 1717 | info_symndx_(NULL), |
a2fb1b05 ILT |
1718 | info_(0), |
1719 | type_(type), | |
61ba1cf9 | 1720 | flags_(flags), |
91ea499d | 1721 | out_shndx_(-1U), |
c06b7b0b ILT |
1722 | symtab_index_(0), |
1723 | dynsym_index_(0), | |
ead1e424 ILT |
1724 | input_sections_(), |
1725 | first_input_offset_(0), | |
c51e6221 | 1726 | fills_(), |
96803768 | 1727 | postprocessing_buffer_(NULL), |
a3ad94ed | 1728 | needs_symtab_index_(false), |
16649710 ILT |
1729 | needs_dynsym_index_(false), |
1730 | should_link_to_symtab_(false), | |
730cdc88 | 1731 | should_link_to_dynsym_(false), |
27bc2bce | 1732 | after_input_sections_(false), |
7bf1f802 | 1733 | requires_postprocessing_(false), |
a445fddf ILT |
1734 | found_in_sections_clause_(false), |
1735 | has_load_address_(false), | |
755ab8af | 1736 | info_uses_section_index_(false), |
2fd32231 ILT |
1737 | may_sort_attached_input_sections_(false), |
1738 | must_sort_attached_input_sections_(false), | |
1739 | attached_input_sections_are_sorted_(false), | |
7bf1f802 | 1740 | tls_offset_(0) |
a2fb1b05 | 1741 | { |
27bc2bce ILT |
1742 | // An unallocated section has no address. Forcing this means that |
1743 | // we don't need special treatment for symbols defined in debug | |
1744 | // sections. | |
1745 | if ((flags & elfcpp::SHF_ALLOC) == 0) | |
1746 | this->set_address(0); | |
a2fb1b05 ILT |
1747 | } |
1748 | ||
54dc6425 ILT |
1749 | Output_section::~Output_section() |
1750 | { | |
1751 | } | |
1752 | ||
16649710 ILT |
1753 | // Set the entry size. |
1754 | ||
1755 | void | |
1756 | Output_section::set_entsize(uint64_t v) | |
1757 | { | |
1758 | if (this->entsize_ == 0) | |
1759 | this->entsize_ = v; | |
1760 | else | |
1761 | gold_assert(this->entsize_ == v); | |
1762 | } | |
1763 | ||
ead1e424 | 1764 | // Add the input section SHNDX, with header SHDR, named SECNAME, in |
730cdc88 ILT |
1765 | // OBJECT, to the Output_section. RELOC_SHNDX is the index of a |
1766 | // relocation section which applies to this section, or 0 if none, or | |
1767 | // -1U if more than one. Return the offset of the input section | |
1768 | // within the output section. Return -1 if the input section will | |
1769 | // receive special handling. In the normal case we don't always keep | |
1770 | // track of input sections for an Output_section. Instead, each | |
1771 | // Object keeps track of the Output_section for each of its input | |
a445fddf ILT |
1772 | // sections. However, if HAVE_SECTIONS_SCRIPT is true, we do keep |
1773 | // track of input sections here; this is used when SECTIONS appears in | |
1774 | // a linker script. | |
a2fb1b05 ILT |
1775 | |
1776 | template<int size, bool big_endian> | |
1777 | off_t | |
730cdc88 ILT |
1778 | Output_section::add_input_section(Sized_relobj<size, big_endian>* object, |
1779 | unsigned int shndx, | |
ead1e424 | 1780 | const char* secname, |
730cdc88 | 1781 | const elfcpp::Shdr<size, big_endian>& shdr, |
a445fddf ILT |
1782 | unsigned int reloc_shndx, |
1783 | bool have_sections_script) | |
a2fb1b05 ILT |
1784 | { |
1785 | elfcpp::Elf_Xword addralign = shdr.get_sh_addralign(); | |
1786 | if ((addralign & (addralign - 1)) != 0) | |
1787 | { | |
75f2446e ILT |
1788 | object->error(_("invalid alignment %lu for section \"%s\""), |
1789 | static_cast<unsigned long>(addralign), secname); | |
1790 | addralign = 1; | |
a2fb1b05 | 1791 | } |
a2fb1b05 ILT |
1792 | |
1793 | if (addralign > this->addralign_) | |
1794 | this->addralign_ = addralign; | |
1795 | ||
44a43cf9 | 1796 | typename elfcpp::Elf_types<size>::Elf_WXword sh_flags = shdr.get_sh_flags(); |
154e0e9a | 1797 | this->update_flags_for_input_section(sh_flags); |
a445fddf | 1798 | |
4f833eee | 1799 | uint64_t entsize = shdr.get_sh_entsize(); |
44a43cf9 ILT |
1800 | |
1801 | // .debug_str is a mergeable string section, but is not always so | |
1802 | // marked by compilers. Mark manually here so we can optimize. | |
1803 | if (strcmp(secname, ".debug_str") == 0) | |
4f833eee ILT |
1804 | { |
1805 | sh_flags |= (elfcpp::SHF_MERGE | elfcpp::SHF_STRINGS); | |
1806 | entsize = 1; | |
1807 | } | |
44a43cf9 | 1808 | |
b8e6aad9 | 1809 | // If this is a SHF_MERGE section, we pass all the input sections to |
730cdc88 ILT |
1810 | // a Output_data_merge. We don't try to handle relocations for such |
1811 | // a section. | |
44a43cf9 | 1812 | if ((sh_flags & elfcpp::SHF_MERGE) != 0 |
730cdc88 | 1813 | && reloc_shndx == 0) |
b8e6aad9 | 1814 | { |
44a43cf9 | 1815 | if (this->add_merge_input_section(object, shndx, sh_flags, |
96803768 | 1816 | entsize, addralign)) |
b8e6aad9 ILT |
1817 | { |
1818 | // Tell the relocation routines that they need to call the | |
730cdc88 | 1819 | // output_offset method to determine the final address. |
b8e6aad9 ILT |
1820 | return -1; |
1821 | } | |
1822 | } | |
1823 | ||
27bc2bce | 1824 | off_t offset_in_section = this->current_data_size_for_child(); |
c51e6221 ILT |
1825 | off_t aligned_offset_in_section = align_address(offset_in_section, |
1826 | addralign); | |
1827 | ||
1828 | if (aligned_offset_in_section > offset_in_section | |
a445fddf | 1829 | && !have_sections_script |
44a43cf9 | 1830 | && (sh_flags & elfcpp::SHF_EXECINSTR) != 0 |
c51e6221 ILT |
1831 | && object->target()->has_code_fill()) |
1832 | { | |
1833 | // We need to add some fill data. Using fill_list_ when | |
1834 | // possible is an optimization, since we will often have fill | |
1835 | // sections without input sections. | |
1836 | off_t fill_len = aligned_offset_in_section - offset_in_section; | |
1837 | if (this->input_sections_.empty()) | |
1838 | this->fills_.push_back(Fill(offset_in_section, fill_len)); | |
1839 | else | |
1840 | { | |
1841 | // FIXME: When relaxing, the size needs to adjust to | |
1842 | // maintain a constant alignment. | |
1843 | std::string fill_data(object->target()->code_fill(fill_len)); | |
1844 | Output_data_const* odc = new Output_data_const(fill_data, 1); | |
1845 | this->input_sections_.push_back(Input_section(odc)); | |
1846 | } | |
1847 | } | |
1848 | ||
27bc2bce ILT |
1849 | this->set_current_data_size_for_child(aligned_offset_in_section |
1850 | + shdr.get_sh_size()); | |
a2fb1b05 | 1851 | |
ead1e424 | 1852 | // We need to keep track of this section if we are already keeping |
2fd32231 ILT |
1853 | // track of sections, or if we are relaxing. Also, if this is a |
1854 | // section which requires sorting, or which may require sorting in | |
1855 | // the future, we keep track of the sections. FIXME: Add test for | |
ead1e424 | 1856 | // relaxing. |
2fd32231 ILT |
1857 | if (have_sections_script |
1858 | || !this->input_sections_.empty() | |
1859 | || this->may_sort_attached_input_sections() | |
1860 | || this->must_sort_attached_input_sections()) | |
ead1e424 ILT |
1861 | this->input_sections_.push_back(Input_section(object, shndx, |
1862 | shdr.get_sh_size(), | |
1863 | addralign)); | |
54dc6425 | 1864 | |
c51e6221 | 1865 | return aligned_offset_in_section; |
61ba1cf9 ILT |
1866 | } |
1867 | ||
ead1e424 ILT |
1868 | // Add arbitrary data to an output section. |
1869 | ||
1870 | void | |
1871 | Output_section::add_output_section_data(Output_section_data* posd) | |
1872 | { | |
b8e6aad9 ILT |
1873 | Input_section inp(posd); |
1874 | this->add_output_section_data(&inp); | |
a445fddf ILT |
1875 | |
1876 | if (posd->is_data_size_valid()) | |
1877 | { | |
1878 | off_t offset_in_section = this->current_data_size_for_child(); | |
1879 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
1880 | posd->addralign()); | |
1881 | this->set_current_data_size_for_child(aligned_offset_in_section | |
1882 | + posd->data_size()); | |
1883 | } | |
b8e6aad9 ILT |
1884 | } |
1885 | ||
1886 | // Add arbitrary data to an output section by Input_section. | |
c06b7b0b | 1887 | |
b8e6aad9 ILT |
1888 | void |
1889 | Output_section::add_output_section_data(Input_section* inp) | |
1890 | { | |
ead1e424 | 1891 | if (this->input_sections_.empty()) |
27bc2bce | 1892 | this->first_input_offset_ = this->current_data_size_for_child(); |
c06b7b0b | 1893 | |
b8e6aad9 | 1894 | this->input_sections_.push_back(*inp); |
c06b7b0b | 1895 | |
b8e6aad9 | 1896 | uint64_t addralign = inp->addralign(); |
ead1e424 ILT |
1897 | if (addralign > this->addralign_) |
1898 | this->addralign_ = addralign; | |
c06b7b0b | 1899 | |
b8e6aad9 ILT |
1900 | inp->set_output_section(this); |
1901 | } | |
1902 | ||
1903 | // Add a merge section to an output section. | |
1904 | ||
1905 | void | |
1906 | Output_section::add_output_merge_section(Output_section_data* posd, | |
1907 | bool is_string, uint64_t entsize) | |
1908 | { | |
1909 | Input_section inp(posd, is_string, entsize); | |
1910 | this->add_output_section_data(&inp); | |
1911 | } | |
1912 | ||
1913 | // Add an input section to a SHF_MERGE section. | |
1914 | ||
1915 | bool | |
1916 | Output_section::add_merge_input_section(Relobj* object, unsigned int shndx, | |
1917 | uint64_t flags, uint64_t entsize, | |
96803768 | 1918 | uint64_t addralign) |
b8e6aad9 | 1919 | { |
87f95776 ILT |
1920 | bool is_string = (flags & elfcpp::SHF_STRINGS) != 0; |
1921 | ||
1922 | // We only merge strings if the alignment is not more than the | |
1923 | // character size. This could be handled, but it's unusual. | |
1924 | if (is_string && addralign > entsize) | |
b8e6aad9 ILT |
1925 | return false; |
1926 | ||
b8e6aad9 ILT |
1927 | Input_section_list::iterator p; |
1928 | for (p = this->input_sections_.begin(); | |
1929 | p != this->input_sections_.end(); | |
1930 | ++p) | |
87f95776 | 1931 | if (p->is_merge_section(is_string, entsize, addralign)) |
9a0910c3 ILT |
1932 | { |
1933 | p->add_input_section(object, shndx); | |
1934 | return true; | |
1935 | } | |
b8e6aad9 ILT |
1936 | |
1937 | // We handle the actual constant merging in Output_merge_data or | |
1938 | // Output_merge_string_data. | |
9a0910c3 ILT |
1939 | Output_section_data* posd; |
1940 | if (!is_string) | |
1941 | posd = new Output_merge_data(entsize, addralign); | |
b8e6aad9 ILT |
1942 | else |
1943 | { | |
9a0910c3 ILT |
1944 | switch (entsize) |
1945 | { | |
1946 | case 1: | |
1947 | posd = new Output_merge_string<char>(addralign); | |
1948 | break; | |
1949 | case 2: | |
1950 | posd = new Output_merge_string<uint16_t>(addralign); | |
1951 | break; | |
1952 | case 4: | |
1953 | posd = new Output_merge_string<uint32_t>(addralign); | |
1954 | break; | |
1955 | default: | |
1956 | return false; | |
1957 | } | |
b8e6aad9 ILT |
1958 | } |
1959 | ||
9a0910c3 ILT |
1960 | this->add_output_merge_section(posd, is_string, entsize); |
1961 | posd->add_input_section(object, shndx); | |
1962 | ||
b8e6aad9 ILT |
1963 | return true; |
1964 | } | |
1965 | ||
730cdc88 ILT |
1966 | // Given an address OFFSET relative to the start of input section |
1967 | // SHNDX in OBJECT, return whether this address is being included in | |
1968 | // the final link. This should only be called if SHNDX in OBJECT has | |
1969 | // a special mapping. | |
1970 | ||
1971 | bool | |
1972 | Output_section::is_input_address_mapped(const Relobj* object, | |
1973 | unsigned int shndx, | |
1974 | off_t offset) const | |
1975 | { | |
1976 | gold_assert(object->is_section_specially_mapped(shndx)); | |
1977 | ||
1978 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
1979 | p != this->input_sections_.end(); | |
1980 | ++p) | |
1981 | { | |
8383303e | 1982 | section_offset_type output_offset; |
730cdc88 ILT |
1983 | if (p->output_offset(object, shndx, offset, &output_offset)) |
1984 | return output_offset != -1; | |
1985 | } | |
1986 | ||
1987 | // By default we assume that the address is mapped. This should | |
1988 | // only be called after we have passed all sections to Layout. At | |
1989 | // that point we should know what we are discarding. | |
1990 | return true; | |
1991 | } | |
1992 | ||
1993 | // Given an address OFFSET relative to the start of input section | |
1994 | // SHNDX in object OBJECT, return the output offset relative to the | |
1e983657 ILT |
1995 | // start of the input section in the output section. This should only |
1996 | // be called if SHNDX in OBJECT has a special mapping. | |
730cdc88 | 1997 | |
8383303e | 1998 | section_offset_type |
730cdc88 | 1999 | Output_section::output_offset(const Relobj* object, unsigned int shndx, |
8383303e | 2000 | section_offset_type offset) const |
730cdc88 ILT |
2001 | { |
2002 | gold_assert(object->is_section_specially_mapped(shndx)); | |
2003 | // This can only be called meaningfully when layout is complete. | |
2004 | gold_assert(Output_data::is_layout_complete()); | |
2005 | ||
2006 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
2007 | p != this->input_sections_.end(); | |
2008 | ++p) | |
2009 | { | |
8383303e | 2010 | section_offset_type output_offset; |
730cdc88 ILT |
2011 | if (p->output_offset(object, shndx, offset, &output_offset)) |
2012 | return output_offset; | |
2013 | } | |
2014 | gold_unreachable(); | |
2015 | } | |
2016 | ||
b8e6aad9 ILT |
2017 | // Return the output virtual address of OFFSET relative to the start |
2018 | // of input section SHNDX in object OBJECT. | |
2019 | ||
2020 | uint64_t | |
2021 | Output_section::output_address(const Relobj* object, unsigned int shndx, | |
2022 | off_t offset) const | |
2023 | { | |
730cdc88 | 2024 | gold_assert(object->is_section_specially_mapped(shndx)); |
730cdc88 | 2025 | |
b8e6aad9 ILT |
2026 | uint64_t addr = this->address() + this->first_input_offset_; |
2027 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
2028 | p != this->input_sections_.end(); | |
2029 | ++p) | |
2030 | { | |
2031 | addr = align_address(addr, p->addralign()); | |
8383303e | 2032 | section_offset_type output_offset; |
730cdc88 ILT |
2033 | if (p->output_offset(object, shndx, offset, &output_offset)) |
2034 | { | |
2035 | if (output_offset == -1) | |
2036 | return -1U; | |
2037 | return addr + output_offset; | |
2038 | } | |
b8e6aad9 ILT |
2039 | addr += p->data_size(); |
2040 | } | |
2041 | ||
2042 | // If we get here, it means that we don't know the mapping for this | |
2043 | // input section. This might happen in principle if | |
2044 | // add_input_section were called before add_output_section_data. | |
2045 | // But it should never actually happen. | |
2046 | ||
2047 | gold_unreachable(); | |
ead1e424 ILT |
2048 | } |
2049 | ||
a9a60db6 ILT |
2050 | // Return the output address of the start of the merged section for |
2051 | // input section SHNDX in object OBJECT. | |
2052 | ||
2053 | uint64_t | |
2054 | Output_section::starting_output_address(const Relobj* object, | |
2055 | unsigned int shndx) const | |
2056 | { | |
2057 | gold_assert(object->is_section_specially_mapped(shndx)); | |
2058 | ||
2059 | uint64_t addr = this->address() + this->first_input_offset_; | |
2060 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
2061 | p != this->input_sections_.end(); | |
2062 | ++p) | |
2063 | { | |
2064 | addr = align_address(addr, p->addralign()); | |
2065 | ||
2066 | // It would be nice if we could use the existing output_offset | |
2067 | // method to get the output offset of input offset 0. | |
2068 | // Unfortunately we don't know for sure that input offset 0 is | |
2069 | // mapped at all. | |
2070 | if (p->is_merge_section_for(object, shndx)) | |
2071 | return addr; | |
2072 | ||
2073 | addr += p->data_size(); | |
2074 | } | |
2075 | gold_unreachable(); | |
2076 | } | |
2077 | ||
27bc2bce | 2078 | // Set the data size of an Output_section. This is where we handle |
ead1e424 ILT |
2079 | // setting the addresses of any Output_section_data objects. |
2080 | ||
2081 | void | |
27bc2bce | 2082 | Output_section::set_final_data_size() |
ead1e424 ILT |
2083 | { |
2084 | if (this->input_sections_.empty()) | |
27bc2bce ILT |
2085 | { |
2086 | this->set_data_size(this->current_data_size_for_child()); | |
2087 | return; | |
2088 | } | |
ead1e424 | 2089 | |
2fd32231 ILT |
2090 | if (this->must_sort_attached_input_sections()) |
2091 | this->sort_attached_input_sections(); | |
2092 | ||
27bc2bce ILT |
2093 | uint64_t address = this->address(); |
2094 | off_t startoff = this->offset(); | |
ead1e424 ILT |
2095 | off_t off = startoff + this->first_input_offset_; |
2096 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2097 | p != this->input_sections_.end(); | |
2098 | ++p) | |
2099 | { | |
2100 | off = align_address(off, p->addralign()); | |
96803768 ILT |
2101 | p->set_address_and_file_offset(address + (off - startoff), off, |
2102 | startoff); | |
ead1e424 ILT |
2103 | off += p->data_size(); |
2104 | } | |
2105 | ||
2106 | this->set_data_size(off - startoff); | |
2107 | } | |
9a0910c3 | 2108 | |
a445fddf ILT |
2109 | // Reset the address and file offset. |
2110 | ||
2111 | void | |
2112 | Output_section::do_reset_address_and_file_offset() | |
2113 | { | |
2114 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2115 | p != this->input_sections_.end(); | |
2116 | ++p) | |
2117 | p->reset_address_and_file_offset(); | |
2118 | } | |
2119 | ||
7bf1f802 ILT |
2120 | // Set the TLS offset. Called only for SHT_TLS sections. |
2121 | ||
2122 | void | |
2123 | Output_section::do_set_tls_offset(uint64_t tls_base) | |
2124 | { | |
2125 | this->tls_offset_ = this->address() - tls_base; | |
2126 | } | |
2127 | ||
2fd32231 ILT |
2128 | // In a few cases we need to sort the input sections attached to an |
2129 | // output section. This is used to implement the type of constructor | |
2130 | // priority ordering implemented by the GNU linker, in which the | |
2131 | // priority becomes part of the section name and the sections are | |
2132 | // sorted by name. We only do this for an output section if we see an | |
2133 | // attached input section matching ".ctor.*", ".dtor.*", | |
2134 | // ".init_array.*" or ".fini_array.*". | |
2135 | ||
2136 | class Output_section::Input_section_sort_entry | |
2137 | { | |
2138 | public: | |
2139 | Input_section_sort_entry() | |
2140 | : input_section_(), index_(-1U), section_has_name_(false), | |
2141 | section_name_() | |
2142 | { } | |
2143 | ||
2144 | Input_section_sort_entry(const Input_section& input_section, | |
2145 | unsigned int index) | |
2146 | : input_section_(input_section), index_(index), | |
2147 | section_has_name_(input_section.is_input_section()) | |
2148 | { | |
2149 | if (this->section_has_name_) | |
2150 | { | |
2151 | // This is only called single-threaded from Layout::finalize, | |
2152 | // so it is OK to lock. Unfortunately we have no way to pass | |
2153 | // in a Task token. | |
2154 | const Task* dummy_task = reinterpret_cast<const Task*>(-1); | |
2155 | Object* obj = input_section.relobj(); | |
2156 | Task_lock_obj<Object> tl(dummy_task, obj); | |
2157 | ||
2158 | // This is a slow operation, which should be cached in | |
2159 | // Layout::layout if this becomes a speed problem. | |
2160 | this->section_name_ = obj->section_name(input_section.shndx()); | |
2161 | } | |
2162 | } | |
2163 | ||
2164 | // Return the Input_section. | |
2165 | const Input_section& | |
2166 | input_section() const | |
2167 | { | |
2168 | gold_assert(this->index_ != -1U); | |
2169 | return this->input_section_; | |
2170 | } | |
2171 | ||
2172 | // The index of this entry in the original list. This is used to | |
2173 | // make the sort stable. | |
2174 | unsigned int | |
2175 | index() const | |
2176 | { | |
2177 | gold_assert(this->index_ != -1U); | |
2178 | return this->index_; | |
2179 | } | |
2180 | ||
2181 | // Whether there is a section name. | |
2182 | bool | |
2183 | section_has_name() const | |
2184 | { return this->section_has_name_; } | |
2185 | ||
2186 | // The section name. | |
2187 | const std::string& | |
2188 | section_name() const | |
2189 | { | |
2190 | gold_assert(this->section_has_name_); | |
2191 | return this->section_name_; | |
2192 | } | |
2193 | ||
ab794b6b ILT |
2194 | // Return true if the section name has a priority. This is assumed |
2195 | // to be true if it has a dot after the initial dot. | |
2fd32231 | 2196 | bool |
ab794b6b | 2197 | has_priority() const |
2fd32231 ILT |
2198 | { |
2199 | gold_assert(this->section_has_name_); | |
ab794b6b | 2200 | return this->section_name_.find('.', 1); |
2fd32231 ILT |
2201 | } |
2202 | ||
ab794b6b ILT |
2203 | // Return true if this an input file whose base name matches |
2204 | // FILE_NAME. The base name must have an extension of ".o", and | |
2205 | // must be exactly FILE_NAME.o or FILE_NAME, one character, ".o". | |
2206 | // This is to match crtbegin.o as well as crtbeginS.o without | |
2207 | // getting confused by other possibilities. Overall matching the | |
2208 | // file name this way is a dreadful hack, but the GNU linker does it | |
2209 | // in order to better support gcc, and we need to be compatible. | |
2fd32231 | 2210 | bool |
ab794b6b | 2211 | match_file_name(const char* match_file_name) const |
2fd32231 | 2212 | { |
2fd32231 ILT |
2213 | const std::string& file_name(this->input_section_.relobj()->name()); |
2214 | const char* base_name = lbasename(file_name.c_str()); | |
2215 | size_t match_len = strlen(match_file_name); | |
2216 | if (strncmp(base_name, match_file_name, match_len) != 0) | |
2217 | return false; | |
2218 | size_t base_len = strlen(base_name); | |
2219 | if (base_len != match_len + 2 && base_len != match_len + 3) | |
2220 | return false; | |
2221 | return memcmp(base_name + base_len - 2, ".o", 2) == 0; | |
2222 | } | |
2223 | ||
2224 | private: | |
2225 | // The Input_section we are sorting. | |
2226 | Input_section input_section_; | |
2227 | // The index of this Input_section in the original list. | |
2228 | unsigned int index_; | |
2229 | // Whether this Input_section has a section name--it won't if this | |
2230 | // is some random Output_section_data. | |
2231 | bool section_has_name_; | |
2232 | // The section name if there is one. | |
2233 | std::string section_name_; | |
2234 | }; | |
2235 | ||
2236 | // Return true if S1 should come before S2 in the output section. | |
2237 | ||
2238 | bool | |
2239 | Output_section::Input_section_sort_compare::operator()( | |
2240 | const Output_section::Input_section_sort_entry& s1, | |
2241 | const Output_section::Input_section_sort_entry& s2) const | |
2242 | { | |
ab794b6b ILT |
2243 | // crtbegin.o must come first. |
2244 | bool s1_begin = s1.match_file_name("crtbegin"); | |
2245 | bool s2_begin = s2.match_file_name("crtbegin"); | |
2fd32231 ILT |
2246 | if (s1_begin || s2_begin) |
2247 | { | |
2248 | if (!s1_begin) | |
2249 | return false; | |
2250 | if (!s2_begin) | |
2251 | return true; | |
2252 | return s1.index() < s2.index(); | |
2253 | } | |
2254 | ||
ab794b6b ILT |
2255 | // crtend.o must come last. |
2256 | bool s1_end = s1.match_file_name("crtend"); | |
2257 | bool s2_end = s2.match_file_name("crtend"); | |
2fd32231 ILT |
2258 | if (s1_end || s2_end) |
2259 | { | |
2260 | if (!s1_end) | |
2261 | return true; | |
2262 | if (!s2_end) | |
2263 | return false; | |
2264 | return s1.index() < s2.index(); | |
2265 | } | |
2266 | ||
ab794b6b ILT |
2267 | // We sort all the sections with no names to the end. |
2268 | if (!s1.section_has_name() || !s2.section_has_name()) | |
2269 | { | |
2270 | if (s1.section_has_name()) | |
2271 | return true; | |
2272 | if (s2.section_has_name()) | |
2273 | return false; | |
2274 | return s1.index() < s2.index(); | |
2275 | } | |
2fd32231 | 2276 | |
ab794b6b ILT |
2277 | // A section with a priority follows a section without a priority. |
2278 | // The GNU linker does this for all but .init_array sections; until | |
2279 | // further notice we'll assume that that is an mistake. | |
2280 | bool s1_has_priority = s1.has_priority(); | |
2281 | bool s2_has_priority = s2.has_priority(); | |
2282 | if (s1_has_priority && !s2_has_priority) | |
2fd32231 | 2283 | return false; |
ab794b6b | 2284 | if (!s1_has_priority && s2_has_priority) |
2fd32231 ILT |
2285 | return true; |
2286 | ||
2287 | // Otherwise we sort by name. | |
2288 | int compare = s1.section_name().compare(s2.section_name()); | |
2289 | if (compare != 0) | |
2290 | return compare < 0; | |
2291 | ||
2292 | // Otherwise we keep the input order. | |
2293 | return s1.index() < s2.index(); | |
2294 | } | |
2295 | ||
2296 | // Sort the input sections attached to an output section. | |
2297 | ||
2298 | void | |
2299 | Output_section::sort_attached_input_sections() | |
2300 | { | |
2301 | if (this->attached_input_sections_are_sorted_) | |
2302 | return; | |
2303 | ||
2304 | // The only thing we know about an input section is the object and | |
2305 | // the section index. We need the section name. Recomputing this | |
2306 | // is slow but this is an unusual case. If this becomes a speed | |
2307 | // problem we can cache the names as required in Layout::layout. | |
2308 | ||
2309 | // We start by building a larger vector holding a copy of each | |
2310 | // Input_section, plus its current index in the list and its name. | |
2311 | std::vector<Input_section_sort_entry> sort_list; | |
2312 | ||
2313 | unsigned int i = 0; | |
2314 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2315 | p != this->input_sections_.end(); | |
2316 | ++p, ++i) | |
2317 | sort_list.push_back(Input_section_sort_entry(*p, i)); | |
2318 | ||
2319 | // Sort the input sections. | |
2320 | std::sort(sort_list.begin(), sort_list.end(), Input_section_sort_compare()); | |
2321 | ||
2322 | // Copy the sorted input sections back to our list. | |
2323 | this->input_sections_.clear(); | |
2324 | for (std::vector<Input_section_sort_entry>::iterator p = sort_list.begin(); | |
2325 | p != sort_list.end(); | |
2326 | ++p) | |
2327 | this->input_sections_.push_back(p->input_section()); | |
2328 | ||
2329 | // Remember that we sorted the input sections, since we might get | |
2330 | // called again. | |
2331 | this->attached_input_sections_are_sorted_ = true; | |
2332 | } | |
2333 | ||
61ba1cf9 ILT |
2334 | // Write the section header to *OSHDR. |
2335 | ||
2336 | template<int size, bool big_endian> | |
2337 | void | |
16649710 ILT |
2338 | Output_section::write_header(const Layout* layout, |
2339 | const Stringpool* secnamepool, | |
61ba1cf9 ILT |
2340 | elfcpp::Shdr_write<size, big_endian>* oshdr) const |
2341 | { | |
2342 | oshdr->put_sh_name(secnamepool->get_offset(this->name_)); | |
2343 | oshdr->put_sh_type(this->type_); | |
6a74a719 ILT |
2344 | |
2345 | elfcpp::Elf_Xword flags = this->flags_; | |
755ab8af | 2346 | if (this->info_section_ != NULL && this->info_uses_section_index_) |
6a74a719 ILT |
2347 | flags |= elfcpp::SHF_INFO_LINK; |
2348 | oshdr->put_sh_flags(flags); | |
2349 | ||
61ba1cf9 ILT |
2350 | oshdr->put_sh_addr(this->address()); |
2351 | oshdr->put_sh_offset(this->offset()); | |
2352 | oshdr->put_sh_size(this->data_size()); | |
16649710 ILT |
2353 | if (this->link_section_ != NULL) |
2354 | oshdr->put_sh_link(this->link_section_->out_shndx()); | |
2355 | else if (this->should_link_to_symtab_) | |
2356 | oshdr->put_sh_link(layout->symtab_section()->out_shndx()); | |
2357 | else if (this->should_link_to_dynsym_) | |
2358 | oshdr->put_sh_link(layout->dynsym_section()->out_shndx()); | |
2359 | else | |
2360 | oshdr->put_sh_link(this->link_); | |
755ab8af ILT |
2361 | |
2362 | elfcpp::Elf_Word info; | |
16649710 | 2363 | if (this->info_section_ != NULL) |
755ab8af ILT |
2364 | { |
2365 | if (this->info_uses_section_index_) | |
2366 | info = this->info_section_->out_shndx(); | |
2367 | else | |
2368 | info = this->info_section_->symtab_index(); | |
2369 | } | |
6a74a719 | 2370 | else if (this->info_symndx_ != NULL) |
755ab8af | 2371 | info = this->info_symndx_->symtab_index(); |
16649710 | 2372 | else |
755ab8af ILT |
2373 | info = this->info_; |
2374 | oshdr->put_sh_info(info); | |
2375 | ||
61ba1cf9 ILT |
2376 | oshdr->put_sh_addralign(this->addralign_); |
2377 | oshdr->put_sh_entsize(this->entsize_); | |
a2fb1b05 ILT |
2378 | } |
2379 | ||
ead1e424 ILT |
2380 | // Write out the data. For input sections the data is written out by |
2381 | // Object::relocate, but we have to handle Output_section_data objects | |
2382 | // here. | |
2383 | ||
2384 | void | |
2385 | Output_section::do_write(Output_file* of) | |
2386 | { | |
96803768 ILT |
2387 | gold_assert(!this->requires_postprocessing()); |
2388 | ||
c51e6221 ILT |
2389 | off_t output_section_file_offset = this->offset(); |
2390 | for (Fill_list::iterator p = this->fills_.begin(); | |
2391 | p != this->fills_.end(); | |
2392 | ++p) | |
2393 | { | |
8851ecca | 2394 | std::string fill_data(parameters->target().code_fill(p->length())); |
c51e6221 | 2395 | of->write(output_section_file_offset + p->section_offset(), |
a445fddf | 2396 | fill_data.data(), fill_data.size()); |
c51e6221 ILT |
2397 | } |
2398 | ||
ead1e424 ILT |
2399 | for (Input_section_list::iterator p = this->input_sections_.begin(); |
2400 | p != this->input_sections_.end(); | |
2401 | ++p) | |
2402 | p->write(of); | |
2403 | } | |
2404 | ||
96803768 ILT |
2405 | // If a section requires postprocessing, create the buffer to use. |
2406 | ||
2407 | void | |
2408 | Output_section::create_postprocessing_buffer() | |
2409 | { | |
2410 | gold_assert(this->requires_postprocessing()); | |
1bedcac5 ILT |
2411 | |
2412 | if (this->postprocessing_buffer_ != NULL) | |
2413 | return; | |
96803768 ILT |
2414 | |
2415 | if (!this->input_sections_.empty()) | |
2416 | { | |
2417 | off_t off = this->first_input_offset_; | |
2418 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2419 | p != this->input_sections_.end(); | |
2420 | ++p) | |
2421 | { | |
2422 | off = align_address(off, p->addralign()); | |
2423 | p->finalize_data_size(); | |
2424 | off += p->data_size(); | |
2425 | } | |
2426 | this->set_current_data_size_for_child(off); | |
2427 | } | |
2428 | ||
2429 | off_t buffer_size = this->current_data_size_for_child(); | |
2430 | this->postprocessing_buffer_ = new unsigned char[buffer_size]; | |
2431 | } | |
2432 | ||
2433 | // Write all the data of an Output_section into the postprocessing | |
2434 | // buffer. This is used for sections which require postprocessing, | |
2435 | // such as compression. Input sections are handled by | |
2436 | // Object::Relocate. | |
2437 | ||
2438 | void | |
2439 | Output_section::write_to_postprocessing_buffer() | |
2440 | { | |
2441 | gold_assert(this->requires_postprocessing()); | |
2442 | ||
96803768 ILT |
2443 | unsigned char* buffer = this->postprocessing_buffer(); |
2444 | for (Fill_list::iterator p = this->fills_.begin(); | |
2445 | p != this->fills_.end(); | |
2446 | ++p) | |
2447 | { | |
8851ecca | 2448 | std::string fill_data(parameters->target().code_fill(p->length())); |
a445fddf ILT |
2449 | memcpy(buffer + p->section_offset(), fill_data.data(), |
2450 | fill_data.size()); | |
96803768 ILT |
2451 | } |
2452 | ||
2453 | off_t off = this->first_input_offset_; | |
2454 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2455 | p != this->input_sections_.end(); | |
2456 | ++p) | |
2457 | { | |
2458 | off = align_address(off, p->addralign()); | |
2459 | p->write_to_buffer(buffer + off); | |
2460 | off += p->data_size(); | |
2461 | } | |
2462 | } | |
2463 | ||
a445fddf ILT |
2464 | // Get the input sections for linker script processing. We leave |
2465 | // behind the Output_section_data entries. Note that this may be | |
2466 | // slightly incorrect for merge sections. We will leave them behind, | |
2467 | // but it is possible that the script says that they should follow | |
2468 | // some other input sections, as in: | |
2469 | // .rodata { *(.rodata) *(.rodata.cst*) } | |
2470 | // For that matter, we don't handle this correctly: | |
2471 | // .rodata { foo.o(.rodata.cst*) *(.rodata.cst*) } | |
2472 | // With luck this will never matter. | |
2473 | ||
2474 | uint64_t | |
2475 | Output_section::get_input_sections( | |
2476 | uint64_t address, | |
2477 | const std::string& fill, | |
2478 | std::list<std::pair<Relobj*, unsigned int> >* input_sections) | |
2479 | { | |
2480 | uint64_t orig_address = address; | |
2481 | ||
2482 | address = align_address(address, this->addralign()); | |
2483 | ||
2484 | Input_section_list remaining; | |
2485 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2486 | p != this->input_sections_.end(); | |
2487 | ++p) | |
2488 | { | |
2489 | if (p->is_input_section()) | |
2490 | input_sections->push_back(std::make_pair(p->relobj(), p->shndx())); | |
2491 | else | |
2492 | { | |
2493 | uint64_t aligned_address = align_address(address, p->addralign()); | |
2494 | if (aligned_address != address && !fill.empty()) | |
2495 | { | |
2496 | section_size_type length = | |
2497 | convert_to_section_size_type(aligned_address - address); | |
2498 | std::string this_fill; | |
2499 | this_fill.reserve(length); | |
2500 | while (this_fill.length() + fill.length() <= length) | |
2501 | this_fill += fill; | |
2502 | if (this_fill.length() < length) | |
2503 | this_fill.append(fill, 0, length - this_fill.length()); | |
2504 | ||
2505 | Output_section_data* posd = new Output_data_const(this_fill, 0); | |
2506 | remaining.push_back(Input_section(posd)); | |
2507 | } | |
2508 | address = aligned_address; | |
2509 | ||
2510 | remaining.push_back(*p); | |
2511 | ||
2512 | p->finalize_data_size(); | |
2513 | address += p->data_size(); | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | this->input_sections_.swap(remaining); | |
2518 | this->first_input_offset_ = 0; | |
2519 | ||
2520 | uint64_t data_size = address - orig_address; | |
2521 | this->set_current_data_size_for_child(data_size); | |
2522 | return data_size; | |
2523 | } | |
2524 | ||
2525 | // Add an input section from a script. | |
2526 | ||
2527 | void | |
2528 | Output_section::add_input_section_for_script(Relobj* object, | |
2529 | unsigned int shndx, | |
2530 | off_t data_size, | |
2531 | uint64_t addralign) | |
2532 | { | |
2533 | if (addralign > this->addralign_) | |
2534 | this->addralign_ = addralign; | |
2535 | ||
2536 | off_t offset_in_section = this->current_data_size_for_child(); | |
2537 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
2538 | addralign); | |
2539 | ||
2540 | this->set_current_data_size_for_child(aligned_offset_in_section | |
2541 | + data_size); | |
2542 | ||
2543 | this->input_sections_.push_back(Input_section(object, shndx, | |
2544 | data_size, addralign)); | |
2545 | } | |
2546 | ||
38c5e8b4 ILT |
2547 | // Print stats for merge sections to stderr. |
2548 | ||
2549 | void | |
2550 | Output_section::print_merge_stats() | |
2551 | { | |
2552 | Input_section_list::iterator p; | |
2553 | for (p = this->input_sections_.begin(); | |
2554 | p != this->input_sections_.end(); | |
2555 | ++p) | |
2556 | p->print_merge_stats(this->name_); | |
2557 | } | |
2558 | ||
a2fb1b05 ILT |
2559 | // Output segment methods. |
2560 | ||
2561 | Output_segment::Output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags) | |
54dc6425 | 2562 | : output_data_(), |
75f65a3e | 2563 | output_bss_(), |
a2fb1b05 ILT |
2564 | vaddr_(0), |
2565 | paddr_(0), | |
2566 | memsz_(0), | |
a445fddf ILT |
2567 | max_align_(0), |
2568 | min_p_align_(0), | |
a2fb1b05 ILT |
2569 | offset_(0), |
2570 | filesz_(0), | |
2571 | type_(type), | |
ead1e424 | 2572 | flags_(flags), |
a445fddf ILT |
2573 | is_max_align_known_(false), |
2574 | are_addresses_set_(false) | |
a2fb1b05 ILT |
2575 | { |
2576 | } | |
2577 | ||
2578 | // Add an Output_section to an Output_segment. | |
2579 | ||
2580 | void | |
75f65a3e | 2581 | Output_segment::add_output_section(Output_section* os, |
dbe717ef ILT |
2582 | elfcpp::Elf_Word seg_flags, |
2583 | bool front) | |
a2fb1b05 | 2584 | { |
a3ad94ed | 2585 | gold_assert((os->flags() & elfcpp::SHF_ALLOC) != 0); |
a445fddf | 2586 | gold_assert(!this->is_max_align_known_); |
75f65a3e | 2587 | |
ead1e424 | 2588 | // Update the segment flags. |
75f65a3e | 2589 | this->flags_ |= seg_flags; |
75f65a3e ILT |
2590 | |
2591 | Output_segment::Output_data_list* pdl; | |
2592 | if (os->type() == elfcpp::SHT_NOBITS) | |
2593 | pdl = &this->output_bss_; | |
2594 | else | |
2595 | pdl = &this->output_data_; | |
54dc6425 | 2596 | |
a2fb1b05 ILT |
2597 | // So that PT_NOTE segments will work correctly, we need to ensure |
2598 | // that all SHT_NOTE sections are adjacent. This will normally | |
2599 | // happen automatically, because all the SHT_NOTE input sections | |
2600 | // will wind up in the same output section. However, it is possible | |
2601 | // for multiple SHT_NOTE input sections to have different section | |
2602 | // flags, and thus be in different output sections, but for the | |
2603 | // different section flags to map into the same segment flags and | |
2604 | // thus the same output segment. | |
54dc6425 ILT |
2605 | |
2606 | // Note that while there may be many input sections in an output | |
2607 | // section, there are normally only a few output sections in an | |
2608 | // output segment. This loop is expected to be fast. | |
2609 | ||
61ba1cf9 | 2610 | if (os->type() == elfcpp::SHT_NOTE && !pdl->empty()) |
a2fb1b05 | 2611 | { |
a3ad94ed | 2612 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 2613 | do |
54dc6425 | 2614 | { |
75f65a3e | 2615 | --p; |
54dc6425 ILT |
2616 | if ((*p)->is_section_type(elfcpp::SHT_NOTE)) |
2617 | { | |
dbe717ef | 2618 | // We don't worry about the FRONT parameter. |
54dc6425 | 2619 | ++p; |
75f65a3e | 2620 | pdl->insert(p, os); |
54dc6425 ILT |
2621 | return; |
2622 | } | |
2623 | } | |
75f65a3e | 2624 | while (p != pdl->begin()); |
54dc6425 ILT |
2625 | } |
2626 | ||
2627 | // Similarly, so that PT_TLS segments will work, we need to group | |
75f65a3e ILT |
2628 | // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special |
2629 | // case: we group the SHF_TLS/SHT_NOBITS sections right after the | |
2630 | // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS | |
07f397ab ILT |
2631 | // correctly. SHF_TLS sections get added to both a PT_LOAD segment |
2632 | // and the PT_TLS segment -- we do this grouping only for the | |
2633 | // PT_LOAD segment. | |
2634 | if (this->type_ != elfcpp::PT_TLS | |
2635 | && (os->flags() & elfcpp::SHF_TLS) != 0 | |
2636 | && !this->output_data_.empty()) | |
54dc6425 | 2637 | { |
75f65a3e ILT |
2638 | pdl = &this->output_data_; |
2639 | bool nobits = os->type() == elfcpp::SHT_NOBITS; | |
ead1e424 | 2640 | bool sawtls = false; |
a3ad94ed | 2641 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 2642 | do |
a2fb1b05 | 2643 | { |
75f65a3e | 2644 | --p; |
ead1e424 ILT |
2645 | bool insert; |
2646 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
2647 | { | |
2648 | sawtls = true; | |
2649 | // Put a NOBITS section after the first TLS section. | |
2650 | // But a PROGBITS section after the first TLS/PROGBITS | |
2651 | // section. | |
2652 | insert = nobits || !(*p)->is_section_type(elfcpp::SHT_NOBITS); | |
2653 | } | |
2654 | else | |
2655 | { | |
2656 | // If we've gone past the TLS sections, but we've seen a | |
2657 | // TLS section, then we need to insert this section now. | |
2658 | insert = sawtls; | |
2659 | } | |
2660 | ||
2661 | if (insert) | |
a2fb1b05 | 2662 | { |
dbe717ef | 2663 | // We don't worry about the FRONT parameter. |
a2fb1b05 | 2664 | ++p; |
75f65a3e | 2665 | pdl->insert(p, os); |
a2fb1b05 ILT |
2666 | return; |
2667 | } | |
2668 | } | |
75f65a3e | 2669 | while (p != pdl->begin()); |
ead1e424 | 2670 | |
dbe717ef ILT |
2671 | // There are no TLS sections yet; put this one at the requested |
2672 | // location in the section list. | |
a2fb1b05 ILT |
2673 | } |
2674 | ||
dbe717ef ILT |
2675 | if (front) |
2676 | pdl->push_front(os); | |
2677 | else | |
2678 | pdl->push_back(os); | |
75f65a3e ILT |
2679 | } |
2680 | ||
1650c4ff ILT |
2681 | // Remove an Output_section from this segment. It is an error if it |
2682 | // is not present. | |
2683 | ||
2684 | void | |
2685 | Output_segment::remove_output_section(Output_section* os) | |
2686 | { | |
2687 | // We only need this for SHT_PROGBITS. | |
2688 | gold_assert(os->type() == elfcpp::SHT_PROGBITS); | |
2689 | for (Output_data_list::iterator p = this->output_data_.begin(); | |
2690 | p != this->output_data_.end(); | |
2691 | ++p) | |
2692 | { | |
2693 | if (*p == os) | |
2694 | { | |
2695 | this->output_data_.erase(p); | |
2696 | return; | |
2697 | } | |
2698 | } | |
2699 | gold_unreachable(); | |
2700 | } | |
2701 | ||
75f65a3e ILT |
2702 | // Add an Output_data (which is not an Output_section) to the start of |
2703 | // a segment. | |
2704 | ||
2705 | void | |
2706 | Output_segment::add_initial_output_data(Output_data* od) | |
2707 | { | |
a445fddf | 2708 | gold_assert(!this->is_max_align_known_); |
75f65a3e ILT |
2709 | this->output_data_.push_front(od); |
2710 | } | |
2711 | ||
2712 | // Return the maximum alignment of the Output_data in Output_segment. | |
75f65a3e ILT |
2713 | |
2714 | uint64_t | |
a445fddf | 2715 | Output_segment::maximum_alignment() |
75f65a3e | 2716 | { |
a445fddf | 2717 | if (!this->is_max_align_known_) |
ead1e424 ILT |
2718 | { |
2719 | uint64_t addralign; | |
2720 | ||
a445fddf ILT |
2721 | addralign = Output_segment::maximum_alignment_list(&this->output_data_); |
2722 | if (addralign > this->max_align_) | |
2723 | this->max_align_ = addralign; | |
ead1e424 | 2724 | |
a445fddf ILT |
2725 | addralign = Output_segment::maximum_alignment_list(&this->output_bss_); |
2726 | if (addralign > this->max_align_) | |
2727 | this->max_align_ = addralign; | |
ead1e424 | 2728 | |
a445fddf | 2729 | this->is_max_align_known_ = true; |
ead1e424 ILT |
2730 | } |
2731 | ||
a445fddf | 2732 | return this->max_align_; |
75f65a3e ILT |
2733 | } |
2734 | ||
ead1e424 ILT |
2735 | // Return the maximum alignment of a list of Output_data. |
2736 | ||
2737 | uint64_t | |
a445fddf | 2738 | Output_segment::maximum_alignment_list(const Output_data_list* pdl) |
ead1e424 ILT |
2739 | { |
2740 | uint64_t ret = 0; | |
2741 | for (Output_data_list::const_iterator p = pdl->begin(); | |
2742 | p != pdl->end(); | |
2743 | ++p) | |
2744 | { | |
2745 | uint64_t addralign = (*p)->addralign(); | |
2746 | if (addralign > ret) | |
2747 | ret = addralign; | |
2748 | } | |
2749 | return ret; | |
2750 | } | |
2751 | ||
4f4c5f80 ILT |
2752 | // Return the number of dynamic relocs applied to this segment. |
2753 | ||
2754 | unsigned int | |
2755 | Output_segment::dynamic_reloc_count() const | |
2756 | { | |
2757 | return (this->dynamic_reloc_count_list(&this->output_data_) | |
2758 | + this->dynamic_reloc_count_list(&this->output_bss_)); | |
2759 | } | |
2760 | ||
2761 | // Return the number of dynamic relocs applied to an Output_data_list. | |
2762 | ||
2763 | unsigned int | |
2764 | Output_segment::dynamic_reloc_count_list(const Output_data_list* pdl) const | |
2765 | { | |
2766 | unsigned int count = 0; | |
2767 | for (Output_data_list::const_iterator p = pdl->begin(); | |
2768 | p != pdl->end(); | |
2769 | ++p) | |
2770 | count += (*p)->dynamic_reloc_count(); | |
2771 | return count; | |
2772 | } | |
2773 | ||
a445fddf ILT |
2774 | // Set the section addresses for an Output_segment. If RESET is true, |
2775 | // reset the addresses first. ADDR is the address and *POFF is the | |
2776 | // file offset. Set the section indexes starting with *PSHNDX. | |
2777 | // Return the address of the immediately following segment. Update | |
2778 | // *POFF and *PSHNDX. | |
75f65a3e ILT |
2779 | |
2780 | uint64_t | |
96a2b4e4 ILT |
2781 | Output_segment::set_section_addresses(const Layout* layout, bool reset, |
2782 | uint64_t addr, off_t* poff, | |
ead1e424 | 2783 | unsigned int* pshndx) |
75f65a3e | 2784 | { |
a3ad94ed | 2785 | gold_assert(this->type_ == elfcpp::PT_LOAD); |
75f65a3e | 2786 | |
a445fddf ILT |
2787 | if (!reset && this->are_addresses_set_) |
2788 | { | |
2789 | gold_assert(this->paddr_ == addr); | |
2790 | addr = this->vaddr_; | |
2791 | } | |
2792 | else | |
2793 | { | |
2794 | this->vaddr_ = addr; | |
2795 | this->paddr_ = addr; | |
2796 | this->are_addresses_set_ = true; | |
2797 | } | |
75f65a3e | 2798 | |
96a2b4e4 ILT |
2799 | bool in_tls = false; |
2800 | ||
75f65a3e ILT |
2801 | off_t orig_off = *poff; |
2802 | this->offset_ = orig_off; | |
2803 | ||
96a2b4e4 ILT |
2804 | addr = this->set_section_list_addresses(layout, reset, &this->output_data_, |
2805 | addr, poff, pshndx, &in_tls); | |
75f65a3e ILT |
2806 | this->filesz_ = *poff - orig_off; |
2807 | ||
2808 | off_t off = *poff; | |
2809 | ||
96a2b4e4 ILT |
2810 | uint64_t ret = this->set_section_list_addresses(layout, reset, |
2811 | &this->output_bss_, | |
2812 | addr, poff, pshndx, | |
2813 | &in_tls); | |
2814 | ||
2815 | // If the last section was a TLS section, align upward to the | |
2816 | // alignment of the TLS segment, so that the overall size of the TLS | |
2817 | // segment is aligned. | |
2818 | if (in_tls) | |
2819 | { | |
2820 | uint64_t segment_align = layout->tls_segment()->maximum_alignment(); | |
2821 | *poff = align_address(*poff, segment_align); | |
2822 | } | |
2823 | ||
75f65a3e ILT |
2824 | this->memsz_ = *poff - orig_off; |
2825 | ||
2826 | // Ignore the file offset adjustments made by the BSS Output_data | |
2827 | // objects. | |
2828 | *poff = off; | |
61ba1cf9 ILT |
2829 | |
2830 | return ret; | |
75f65a3e ILT |
2831 | } |
2832 | ||
b8e6aad9 ILT |
2833 | // Set the addresses and file offsets in a list of Output_data |
2834 | // structures. | |
75f65a3e ILT |
2835 | |
2836 | uint64_t | |
96a2b4e4 ILT |
2837 | Output_segment::set_section_list_addresses(const Layout* layout, bool reset, |
2838 | Output_data_list* pdl, | |
ead1e424 | 2839 | uint64_t addr, off_t* poff, |
96a2b4e4 ILT |
2840 | unsigned int* pshndx, |
2841 | bool* in_tls) | |
75f65a3e | 2842 | { |
ead1e424 | 2843 | off_t startoff = *poff; |
75f65a3e | 2844 | |
ead1e424 | 2845 | off_t off = startoff; |
75f65a3e ILT |
2846 | for (Output_data_list::iterator p = pdl->begin(); |
2847 | p != pdl->end(); | |
2848 | ++p) | |
2849 | { | |
a445fddf ILT |
2850 | if (reset) |
2851 | (*p)->reset_address_and_file_offset(); | |
2852 | ||
2853 | // When using a linker script the section will most likely | |
2854 | // already have an address. | |
2855 | if (!(*p)->is_address_valid()) | |
3802b2dd | 2856 | { |
96a2b4e4 ILT |
2857 | uint64_t align = (*p)->addralign(); |
2858 | ||
2859 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
2860 | { | |
2861 | // Give the first TLS section the alignment of the | |
2862 | // entire TLS segment. Otherwise the TLS segment as a | |
2863 | // whole may be misaligned. | |
2864 | if (!*in_tls) | |
2865 | { | |
2866 | Output_segment* tls_segment = layout->tls_segment(); | |
2867 | gold_assert(tls_segment != NULL); | |
2868 | uint64_t segment_align = tls_segment->maximum_alignment(); | |
2869 | gold_assert(segment_align >= align); | |
2870 | align = segment_align; | |
2871 | ||
2872 | *in_tls = true; | |
2873 | } | |
2874 | } | |
2875 | else | |
2876 | { | |
2877 | // If this is the first section after the TLS segment, | |
2878 | // align it to at least the alignment of the TLS | |
2879 | // segment, so that the size of the overall TLS segment | |
2880 | // is aligned. | |
2881 | if (*in_tls) | |
2882 | { | |
2883 | uint64_t segment_align = | |
2884 | layout->tls_segment()->maximum_alignment(); | |
2885 | if (segment_align > align) | |
2886 | align = segment_align; | |
2887 | ||
2888 | *in_tls = false; | |
2889 | } | |
2890 | } | |
2891 | ||
2892 | off = align_address(off, align); | |
3802b2dd ILT |
2893 | (*p)->set_address_and_file_offset(addr + (off - startoff), off); |
2894 | } | |
a445fddf ILT |
2895 | else |
2896 | { | |
2897 | // The script may have inserted a skip forward, but it | |
2898 | // better not have moved backward. | |
3802b2dd ILT |
2899 | gold_assert((*p)->address() >= addr + (off - startoff)); |
2900 | off += (*p)->address() - (addr + (off - startoff)); | |
a445fddf ILT |
2901 | (*p)->set_file_offset(off); |
2902 | (*p)->finalize_data_size(); | |
2903 | } | |
ead1e424 | 2904 | |
96a2b4e4 ILT |
2905 | // We want to ignore the size of a SHF_TLS or SHT_NOBITS |
2906 | // section. Such a section does not affect the size of a | |
2907 | // PT_LOAD segment. | |
2908 | if (!(*p)->is_section_flag_set(elfcpp::SHF_TLS) | |
ead1e424 ILT |
2909 | || !(*p)->is_section_type(elfcpp::SHT_NOBITS)) |
2910 | off += (*p)->data_size(); | |
75f65a3e | 2911 | |
ead1e424 ILT |
2912 | if ((*p)->is_section()) |
2913 | { | |
2914 | (*p)->set_out_shndx(*pshndx); | |
2915 | ++*pshndx; | |
2916 | } | |
75f65a3e ILT |
2917 | } |
2918 | ||
2919 | *poff = off; | |
ead1e424 | 2920 | return addr + (off - startoff); |
75f65a3e ILT |
2921 | } |
2922 | ||
2923 | // For a non-PT_LOAD segment, set the offset from the sections, if | |
2924 | // any. | |
2925 | ||
2926 | void | |
2927 | Output_segment::set_offset() | |
2928 | { | |
a3ad94ed | 2929 | gold_assert(this->type_ != elfcpp::PT_LOAD); |
75f65a3e | 2930 | |
a445fddf ILT |
2931 | gold_assert(!this->are_addresses_set_); |
2932 | ||
75f65a3e ILT |
2933 | if (this->output_data_.empty() && this->output_bss_.empty()) |
2934 | { | |
2935 | this->vaddr_ = 0; | |
2936 | this->paddr_ = 0; | |
a445fddf | 2937 | this->are_addresses_set_ = true; |
75f65a3e | 2938 | this->memsz_ = 0; |
a445fddf | 2939 | this->min_p_align_ = 0; |
75f65a3e ILT |
2940 | this->offset_ = 0; |
2941 | this->filesz_ = 0; | |
2942 | return; | |
2943 | } | |
2944 | ||
2945 | const Output_data* first; | |
2946 | if (this->output_data_.empty()) | |
2947 | first = this->output_bss_.front(); | |
2948 | else | |
2949 | first = this->output_data_.front(); | |
2950 | this->vaddr_ = first->address(); | |
a445fddf ILT |
2951 | this->paddr_ = (first->has_load_address() |
2952 | ? first->load_address() | |
2953 | : this->vaddr_); | |
2954 | this->are_addresses_set_ = true; | |
75f65a3e ILT |
2955 | this->offset_ = first->offset(); |
2956 | ||
2957 | if (this->output_data_.empty()) | |
2958 | this->filesz_ = 0; | |
2959 | else | |
2960 | { | |
2961 | const Output_data* last_data = this->output_data_.back(); | |
2962 | this->filesz_ = (last_data->address() | |
2963 | + last_data->data_size() | |
2964 | - this->vaddr_); | |
2965 | } | |
2966 | ||
2967 | const Output_data* last; | |
2968 | if (this->output_bss_.empty()) | |
2969 | last = this->output_data_.back(); | |
2970 | else | |
2971 | last = this->output_bss_.back(); | |
2972 | this->memsz_ = (last->address() | |
2973 | + last->data_size() | |
2974 | - this->vaddr_); | |
96a2b4e4 ILT |
2975 | |
2976 | // If this is a TLS segment, align the memory size. The code in | |
2977 | // set_section_list ensures that the section after the TLS segment | |
2978 | // is aligned to give us room. | |
2979 | if (this->type_ == elfcpp::PT_TLS) | |
2980 | { | |
2981 | uint64_t segment_align = this->maximum_alignment(); | |
2982 | gold_assert(this->vaddr_ == align_address(this->vaddr_, segment_align)); | |
2983 | this->memsz_ = align_address(this->memsz_, segment_align); | |
2984 | } | |
75f65a3e ILT |
2985 | } |
2986 | ||
7bf1f802 ILT |
2987 | // Set the TLS offsets of the sections in the PT_TLS segment. |
2988 | ||
2989 | void | |
2990 | Output_segment::set_tls_offsets() | |
2991 | { | |
2992 | gold_assert(this->type_ == elfcpp::PT_TLS); | |
2993 | ||
2994 | for (Output_data_list::iterator p = this->output_data_.begin(); | |
2995 | p != this->output_data_.end(); | |
2996 | ++p) | |
2997 | (*p)->set_tls_offset(this->vaddr_); | |
2998 | ||
2999 | for (Output_data_list::iterator p = this->output_bss_.begin(); | |
3000 | p != this->output_bss_.end(); | |
3001 | ++p) | |
3002 | (*p)->set_tls_offset(this->vaddr_); | |
3003 | } | |
3004 | ||
a445fddf ILT |
3005 | // Return the address of the first section. |
3006 | ||
3007 | uint64_t | |
3008 | Output_segment::first_section_load_address() const | |
3009 | { | |
3010 | for (Output_data_list::const_iterator p = this->output_data_.begin(); | |
3011 | p != this->output_data_.end(); | |
3012 | ++p) | |
3013 | if ((*p)->is_section()) | |
3014 | return (*p)->has_load_address() ? (*p)->load_address() : (*p)->address(); | |
3015 | ||
3016 | for (Output_data_list::const_iterator p = this->output_bss_.begin(); | |
3017 | p != this->output_bss_.end(); | |
3018 | ++p) | |
3019 | if ((*p)->is_section()) | |
3020 | return (*p)->has_load_address() ? (*p)->load_address() : (*p)->address(); | |
3021 | ||
3022 | gold_unreachable(); | |
3023 | } | |
3024 | ||
75f65a3e ILT |
3025 | // Return the number of Output_sections in an Output_segment. |
3026 | ||
3027 | unsigned int | |
3028 | Output_segment::output_section_count() const | |
3029 | { | |
3030 | return (this->output_section_count_list(&this->output_data_) | |
3031 | + this->output_section_count_list(&this->output_bss_)); | |
3032 | } | |
3033 | ||
3034 | // Return the number of Output_sections in an Output_data_list. | |
3035 | ||
3036 | unsigned int | |
3037 | Output_segment::output_section_count_list(const Output_data_list* pdl) const | |
3038 | { | |
3039 | unsigned int count = 0; | |
3040 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3041 | p != pdl->end(); | |
3042 | ++p) | |
3043 | { | |
3044 | if ((*p)->is_section()) | |
3045 | ++count; | |
3046 | } | |
3047 | return count; | |
a2fb1b05 ILT |
3048 | } |
3049 | ||
1c4f3631 ILT |
3050 | // Return the section attached to the list segment with the lowest |
3051 | // load address. This is used when handling a PHDRS clause in a | |
3052 | // linker script. | |
3053 | ||
3054 | Output_section* | |
3055 | Output_segment::section_with_lowest_load_address() const | |
3056 | { | |
3057 | Output_section* found = NULL; | |
3058 | uint64_t found_lma = 0; | |
3059 | this->lowest_load_address_in_list(&this->output_data_, &found, &found_lma); | |
3060 | ||
3061 | Output_section* found_data = found; | |
3062 | this->lowest_load_address_in_list(&this->output_bss_, &found, &found_lma); | |
3063 | if (found != found_data && found_data != NULL) | |
3064 | { | |
3065 | gold_error(_("nobits section %s may not precede progbits section %s " | |
3066 | "in same segment"), | |
3067 | found->name(), found_data->name()); | |
3068 | return NULL; | |
3069 | } | |
3070 | ||
3071 | return found; | |
3072 | } | |
3073 | ||
3074 | // Look through a list for a section with a lower load address. | |
3075 | ||
3076 | void | |
3077 | Output_segment::lowest_load_address_in_list(const Output_data_list* pdl, | |
3078 | Output_section** found, | |
3079 | uint64_t* found_lma) const | |
3080 | { | |
3081 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3082 | p != pdl->end(); | |
3083 | ++p) | |
3084 | { | |
3085 | if (!(*p)->is_section()) | |
3086 | continue; | |
3087 | Output_section* os = static_cast<Output_section*>(*p); | |
3088 | uint64_t lma = (os->has_load_address() | |
3089 | ? os->load_address() | |
3090 | : os->address()); | |
3091 | if (*found == NULL || lma < *found_lma) | |
3092 | { | |
3093 | *found = os; | |
3094 | *found_lma = lma; | |
3095 | } | |
3096 | } | |
3097 | } | |
3098 | ||
61ba1cf9 ILT |
3099 | // Write the segment data into *OPHDR. |
3100 | ||
3101 | template<int size, bool big_endian> | |
3102 | void | |
ead1e424 | 3103 | Output_segment::write_header(elfcpp::Phdr_write<size, big_endian>* ophdr) |
61ba1cf9 ILT |
3104 | { |
3105 | ophdr->put_p_type(this->type_); | |
3106 | ophdr->put_p_offset(this->offset_); | |
3107 | ophdr->put_p_vaddr(this->vaddr_); | |
3108 | ophdr->put_p_paddr(this->paddr_); | |
3109 | ophdr->put_p_filesz(this->filesz_); | |
3110 | ophdr->put_p_memsz(this->memsz_); | |
3111 | ophdr->put_p_flags(this->flags_); | |
a445fddf | 3112 | ophdr->put_p_align(std::max(this->min_p_align_, this->maximum_alignment())); |
61ba1cf9 ILT |
3113 | } |
3114 | ||
3115 | // Write the section headers into V. | |
3116 | ||
3117 | template<int size, bool big_endian> | |
3118 | unsigned char* | |
16649710 ILT |
3119 | Output_segment::write_section_headers(const Layout* layout, |
3120 | const Stringpool* secnamepool, | |
ead1e424 | 3121 | unsigned char* v, |
7d1a9ebb | 3122 | unsigned int *pshndx) const |
5482377d | 3123 | { |
ead1e424 ILT |
3124 | // Every section that is attached to a segment must be attached to a |
3125 | // PT_LOAD segment, so we only write out section headers for PT_LOAD | |
3126 | // segments. | |
3127 | if (this->type_ != elfcpp::PT_LOAD) | |
3128 | return v; | |
3129 | ||
7d1a9ebb ILT |
3130 | v = this->write_section_headers_list<size, big_endian>(layout, secnamepool, |
3131 | &this->output_data_, | |
3132 | v, pshndx); | |
3133 | v = this->write_section_headers_list<size, big_endian>(layout, secnamepool, | |
3134 | &this->output_bss_, | |
3135 | v, pshndx); | |
61ba1cf9 ILT |
3136 | return v; |
3137 | } | |
3138 | ||
3139 | template<int size, bool big_endian> | |
3140 | unsigned char* | |
16649710 ILT |
3141 | Output_segment::write_section_headers_list(const Layout* layout, |
3142 | const Stringpool* secnamepool, | |
61ba1cf9 | 3143 | const Output_data_list* pdl, |
ead1e424 | 3144 | unsigned char* v, |
7d1a9ebb | 3145 | unsigned int* pshndx) const |
61ba1cf9 ILT |
3146 | { |
3147 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
3148 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3149 | p != pdl->end(); | |
3150 | ++p) | |
3151 | { | |
3152 | if ((*p)->is_section()) | |
3153 | { | |
5482377d | 3154 | const Output_section* ps = static_cast<const Output_section*>(*p); |
a3ad94ed | 3155 | gold_assert(*pshndx == ps->out_shndx()); |
61ba1cf9 | 3156 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 3157 | ps->write_header(layout, secnamepool, &oshdr); |
61ba1cf9 | 3158 | v += shdr_size; |
ead1e424 | 3159 | ++*pshndx; |
61ba1cf9 ILT |
3160 | } |
3161 | } | |
3162 | return v; | |
3163 | } | |
3164 | ||
a2fb1b05 ILT |
3165 | // Output_file methods. |
3166 | ||
14144f39 ILT |
3167 | Output_file::Output_file(const char* name) |
3168 | : name_(name), | |
61ba1cf9 ILT |
3169 | o_(-1), |
3170 | file_size_(0), | |
c420411f | 3171 | base_(NULL), |
516cb3d0 ILT |
3172 | map_is_anonymous_(false), |
3173 | is_temporary_(false) | |
61ba1cf9 ILT |
3174 | { |
3175 | } | |
3176 | ||
3177 | // Open the output file. | |
3178 | ||
a2fb1b05 | 3179 | void |
61ba1cf9 | 3180 | Output_file::open(off_t file_size) |
a2fb1b05 | 3181 | { |
61ba1cf9 ILT |
3182 | this->file_size_ = file_size; |
3183 | ||
4e9d8586 ILT |
3184 | // Unlink the file first; otherwise the open() may fail if the file |
3185 | // is busy (e.g. it's an executable that's currently being executed). | |
3186 | // | |
3187 | // However, the linker may be part of a system where a zero-length | |
3188 | // file is created for it to write to, with tight permissions (gcc | |
3189 | // 2.95 did something like this). Unlinking the file would work | |
3190 | // around those permission controls, so we only unlink if the file | |
3191 | // has a non-zero size. We also unlink only regular files to avoid | |
3192 | // trouble with directories/etc. | |
3193 | // | |
3194 | // If we fail, continue; this command is merely a best-effort attempt | |
3195 | // to improve the odds for open(). | |
3196 | ||
42a1b686 | 3197 | // We let the name "-" mean "stdout" |
516cb3d0 | 3198 | if (!this->is_temporary_) |
42a1b686 | 3199 | { |
516cb3d0 ILT |
3200 | if (strcmp(this->name_, "-") == 0) |
3201 | this->o_ = STDOUT_FILENO; | |
3202 | else | |
3203 | { | |
3204 | struct stat s; | |
3205 | if (::stat(this->name_, &s) == 0 && s.st_size != 0) | |
3206 | unlink_if_ordinary(this->name_); | |
3207 | ||
8851ecca | 3208 | int mode = parameters->options().relocatable() ? 0666 : 0777; |
516cb3d0 ILT |
3209 | int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode); |
3210 | if (o < 0) | |
3211 | gold_fatal(_("%s: open: %s"), this->name_, strerror(errno)); | |
3212 | this->o_ = o; | |
3213 | } | |
42a1b686 | 3214 | } |
61ba1cf9 | 3215 | |
27bc2bce ILT |
3216 | this->map(); |
3217 | } | |
3218 | ||
3219 | // Resize the output file. | |
3220 | ||
3221 | void | |
3222 | Output_file::resize(off_t file_size) | |
3223 | { | |
c420411f ILT |
3224 | // If the mmap is mapping an anonymous memory buffer, this is easy: |
3225 | // just mremap to the new size. If it's mapping to a file, we want | |
3226 | // to unmap to flush to the file, then remap after growing the file. | |
3227 | if (this->map_is_anonymous_) | |
3228 | { | |
3229 | void* base = ::mremap(this->base_, this->file_size_, file_size, | |
3230 | MREMAP_MAYMOVE); | |
3231 | if (base == MAP_FAILED) | |
3232 | gold_fatal(_("%s: mremap: %s"), this->name_, strerror(errno)); | |
3233 | this->base_ = static_cast<unsigned char*>(base); | |
3234 | this->file_size_ = file_size; | |
3235 | } | |
3236 | else | |
3237 | { | |
3238 | this->unmap(); | |
3239 | this->file_size_ = file_size; | |
3240 | this->map(); | |
3241 | } | |
27bc2bce ILT |
3242 | } |
3243 | ||
3244 | // Map the file into memory. | |
3245 | ||
3246 | void | |
3247 | Output_file::map() | |
3248 | { | |
c420411f | 3249 | const int o = this->o_; |
61ba1cf9 | 3250 | |
c420411f ILT |
3251 | // If the output file is not a regular file, don't try to mmap it; |
3252 | // instead, we'll mmap a block of memory (an anonymous buffer), and | |
3253 | // then later write the buffer to the file. | |
3254 | void* base; | |
3255 | struct stat statbuf; | |
42a1b686 ILT |
3256 | if (o == STDOUT_FILENO || o == STDERR_FILENO |
3257 | || ::fstat(o, &statbuf) != 0 | |
516cb3d0 ILT |
3258 | || !S_ISREG(statbuf.st_mode) |
3259 | || this->is_temporary_) | |
c420411f ILT |
3260 | { |
3261 | this->map_is_anonymous_ = true; | |
3262 | base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE, | |
3263 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
3264 | } | |
3265 | else | |
3266 | { | |
3267 | // Write out one byte to make the file the right size. | |
3268 | if (::lseek(o, this->file_size_ - 1, SEEK_SET) < 0) | |
3269 | gold_fatal(_("%s: lseek: %s"), this->name_, strerror(errno)); | |
3270 | char b = 0; | |
3271 | if (::write(o, &b, 1) != 1) | |
3272 | gold_fatal(_("%s: write: %s"), this->name_, strerror(errno)); | |
3273 | ||
3274 | // Map the file into memory. | |
3275 | this->map_is_anonymous_ = false; | |
3276 | base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE, | |
3277 | MAP_SHARED, o, 0); | |
3278 | } | |
61ba1cf9 | 3279 | if (base == MAP_FAILED) |
75f2446e | 3280 | gold_fatal(_("%s: mmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 ILT |
3281 | this->base_ = static_cast<unsigned char*>(base); |
3282 | } | |
3283 | ||
c420411f | 3284 | // Unmap the file from memory. |
61ba1cf9 ILT |
3285 | |
3286 | void | |
c420411f | 3287 | Output_file::unmap() |
61ba1cf9 ILT |
3288 | { |
3289 | if (::munmap(this->base_, this->file_size_) < 0) | |
a0c4fb0a | 3290 | gold_error(_("%s: munmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 | 3291 | this->base_ = NULL; |
c420411f ILT |
3292 | } |
3293 | ||
3294 | // Close the output file. | |
3295 | ||
3296 | void | |
3297 | Output_file::close() | |
3298 | { | |
3299 | // If the map isn't file-backed, we need to write it now. | |
516cb3d0 | 3300 | if (this->map_is_anonymous_ && !this->is_temporary_) |
c420411f ILT |
3301 | { |
3302 | size_t bytes_to_write = this->file_size_; | |
3303 | while (bytes_to_write > 0) | |
3304 | { | |
3305 | ssize_t bytes_written = ::write(this->o_, this->base_, bytes_to_write); | |
3306 | if (bytes_written == 0) | |
3307 | gold_error(_("%s: write: unexpected 0 return-value"), this->name_); | |
3308 | else if (bytes_written < 0) | |
3309 | gold_error(_("%s: write: %s"), this->name_, strerror(errno)); | |
3310 | else | |
3311 | bytes_to_write -= bytes_written; | |
3312 | } | |
3313 | } | |
3314 | this->unmap(); | |
61ba1cf9 | 3315 | |
42a1b686 | 3316 | // We don't close stdout or stderr |
516cb3d0 ILT |
3317 | if (this->o_ != STDOUT_FILENO |
3318 | && this->o_ != STDERR_FILENO | |
3319 | && !this->is_temporary_) | |
42a1b686 ILT |
3320 | if (::close(this->o_) < 0) |
3321 | gold_error(_("%s: close: %s"), this->name_, strerror(errno)); | |
61ba1cf9 | 3322 | this->o_ = -1; |
a2fb1b05 ILT |
3323 | } |
3324 | ||
3325 | // Instantiate the templates we need. We could use the configure | |
3326 | // script to restrict this to only the ones for implemented targets. | |
3327 | ||
193a53d9 | 3328 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
3329 | template |
3330 | off_t | |
3331 | Output_section::add_input_section<32, false>( | |
730cdc88 | 3332 | Sized_relobj<32, false>* object, |
ead1e424 | 3333 | unsigned int shndx, |
a2fb1b05 | 3334 | const char* secname, |
730cdc88 | 3335 | const elfcpp::Shdr<32, false>& shdr, |
a445fddf ILT |
3336 | unsigned int reloc_shndx, |
3337 | bool have_sections_script); | |
193a53d9 | 3338 | #endif |
a2fb1b05 | 3339 | |
193a53d9 | 3340 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
3341 | template |
3342 | off_t | |
3343 | Output_section::add_input_section<32, true>( | |
730cdc88 | 3344 | Sized_relobj<32, true>* object, |
ead1e424 | 3345 | unsigned int shndx, |
a2fb1b05 | 3346 | const char* secname, |
730cdc88 | 3347 | const elfcpp::Shdr<32, true>& shdr, |
a445fddf ILT |
3348 | unsigned int reloc_shndx, |
3349 | bool have_sections_script); | |
193a53d9 | 3350 | #endif |
a2fb1b05 | 3351 | |
193a53d9 | 3352 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
3353 | template |
3354 | off_t | |
3355 | Output_section::add_input_section<64, false>( | |
730cdc88 | 3356 | Sized_relobj<64, false>* object, |
ead1e424 | 3357 | unsigned int shndx, |
a2fb1b05 | 3358 | const char* secname, |
730cdc88 | 3359 | const elfcpp::Shdr<64, false>& shdr, |
a445fddf ILT |
3360 | unsigned int reloc_shndx, |
3361 | bool have_sections_script); | |
193a53d9 | 3362 | #endif |
a2fb1b05 | 3363 | |
193a53d9 | 3364 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
3365 | template |
3366 | off_t | |
3367 | Output_section::add_input_section<64, true>( | |
730cdc88 | 3368 | Sized_relobj<64, true>* object, |
ead1e424 | 3369 | unsigned int shndx, |
a2fb1b05 | 3370 | const char* secname, |
730cdc88 | 3371 | const elfcpp::Shdr<64, true>& shdr, |
a445fddf ILT |
3372 | unsigned int reloc_shndx, |
3373 | bool have_sections_script); | |
193a53d9 | 3374 | #endif |
a2fb1b05 | 3375 | |
193a53d9 | 3376 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
3377 | template |
3378 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, false>; | |
193a53d9 | 3379 | #endif |
c06b7b0b | 3380 | |
193a53d9 | 3381 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
3382 | template |
3383 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, true>; | |
193a53d9 | 3384 | #endif |
c06b7b0b | 3385 | |
193a53d9 | 3386 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
3387 | template |
3388 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, false>; | |
193a53d9 | 3389 | #endif |
c06b7b0b | 3390 | |
193a53d9 | 3391 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
3392 | template |
3393 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, true>; | |
193a53d9 | 3394 | #endif |
c06b7b0b | 3395 | |
193a53d9 | 3396 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
3397 | template |
3398 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, false>; | |
193a53d9 | 3399 | #endif |
c06b7b0b | 3400 | |
193a53d9 | 3401 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
3402 | template |
3403 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, true>; | |
193a53d9 | 3404 | #endif |
c06b7b0b | 3405 | |
193a53d9 | 3406 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
3407 | template |
3408 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, false>; | |
193a53d9 | 3409 | #endif |
c06b7b0b | 3410 | |
193a53d9 | 3411 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
3412 | template |
3413 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, true>; | |
193a53d9 | 3414 | #endif |
c06b7b0b | 3415 | |
193a53d9 | 3416 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
3417 | template |
3418 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, false>; | |
193a53d9 | 3419 | #endif |
c06b7b0b | 3420 | |
193a53d9 | 3421 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
3422 | template |
3423 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, true>; | |
193a53d9 | 3424 | #endif |
c06b7b0b | 3425 | |
193a53d9 | 3426 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
3427 | template |
3428 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, false>; | |
193a53d9 | 3429 | #endif |
c06b7b0b | 3430 | |
193a53d9 | 3431 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
3432 | template |
3433 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, true>; | |
193a53d9 | 3434 | #endif |
c06b7b0b | 3435 | |
193a53d9 | 3436 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
3437 | template |
3438 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
193a53d9 | 3439 | #endif |
c06b7b0b | 3440 | |
193a53d9 | 3441 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
3442 | template |
3443 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
193a53d9 | 3444 | #endif |
c06b7b0b | 3445 | |
193a53d9 | 3446 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
3447 | template |
3448 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
193a53d9 | 3449 | #endif |
c06b7b0b | 3450 | |
193a53d9 | 3451 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
3452 | template |
3453 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
193a53d9 | 3454 | #endif |
c06b7b0b | 3455 | |
6a74a719 ILT |
3456 | #ifdef HAVE_TARGET_32_LITTLE |
3457 | template | |
3458 | class Output_relocatable_relocs<elfcpp::SHT_REL, 32, false>; | |
3459 | #endif | |
3460 | ||
3461 | #ifdef HAVE_TARGET_32_BIG | |
3462 | template | |
3463 | class Output_relocatable_relocs<elfcpp::SHT_REL, 32, true>; | |
3464 | #endif | |
3465 | ||
3466 | #ifdef HAVE_TARGET_64_LITTLE | |
3467 | template | |
3468 | class Output_relocatable_relocs<elfcpp::SHT_REL, 64, false>; | |
3469 | #endif | |
3470 | ||
3471 | #ifdef HAVE_TARGET_64_BIG | |
3472 | template | |
3473 | class Output_relocatable_relocs<elfcpp::SHT_REL, 64, true>; | |
3474 | #endif | |
3475 | ||
3476 | #ifdef HAVE_TARGET_32_LITTLE | |
3477 | template | |
3478 | class Output_relocatable_relocs<elfcpp::SHT_RELA, 32, false>; | |
3479 | #endif | |
3480 | ||
3481 | #ifdef HAVE_TARGET_32_BIG | |
3482 | template | |
3483 | class Output_relocatable_relocs<elfcpp::SHT_RELA, 32, true>; | |
3484 | #endif | |
3485 | ||
3486 | #ifdef HAVE_TARGET_64_LITTLE | |
3487 | template | |
3488 | class Output_relocatable_relocs<elfcpp::SHT_RELA, 64, false>; | |
3489 | #endif | |
3490 | ||
3491 | #ifdef HAVE_TARGET_64_BIG | |
3492 | template | |
3493 | class Output_relocatable_relocs<elfcpp::SHT_RELA, 64, true>; | |
3494 | #endif | |
3495 | ||
3496 | #ifdef HAVE_TARGET_32_LITTLE | |
3497 | template | |
3498 | class Output_data_group<32, false>; | |
3499 | #endif | |
3500 | ||
3501 | #ifdef HAVE_TARGET_32_BIG | |
3502 | template | |
3503 | class Output_data_group<32, true>; | |
3504 | #endif | |
3505 | ||
3506 | #ifdef HAVE_TARGET_64_LITTLE | |
3507 | template | |
3508 | class Output_data_group<64, false>; | |
3509 | #endif | |
3510 | ||
3511 | #ifdef HAVE_TARGET_64_BIG | |
3512 | template | |
3513 | class Output_data_group<64, true>; | |
3514 | #endif | |
3515 | ||
193a53d9 | 3516 | #ifdef HAVE_TARGET_32_LITTLE |
ead1e424 | 3517 | template |
dbe717ef | 3518 | class Output_data_got<32, false>; |
193a53d9 | 3519 | #endif |
ead1e424 | 3520 | |
193a53d9 | 3521 | #ifdef HAVE_TARGET_32_BIG |
ead1e424 | 3522 | template |
dbe717ef | 3523 | class Output_data_got<32, true>; |
193a53d9 | 3524 | #endif |
ead1e424 | 3525 | |
193a53d9 | 3526 | #ifdef HAVE_TARGET_64_LITTLE |
ead1e424 | 3527 | template |
dbe717ef | 3528 | class Output_data_got<64, false>; |
193a53d9 | 3529 | #endif |
ead1e424 | 3530 | |
193a53d9 | 3531 | #ifdef HAVE_TARGET_64_BIG |
ead1e424 | 3532 | template |
dbe717ef | 3533 | class Output_data_got<64, true>; |
193a53d9 | 3534 | #endif |
ead1e424 | 3535 | |
a2fb1b05 | 3536 | } // End namespace gold. |