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a2fb1b05 ILT |
1 | // layout.cc -- lay out output file sections for gold |
2 | ||
6cb15b7f ILT |
3 | // Copyright 2006, 2007 Free Software Foundation, Inc. |
4 | // Written by Ian Lance Taylor <iant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
a2fb1b05 ILT |
23 | #include "gold.h" |
24 | ||
a2fb1b05 | 25 | #include <cstring> |
54dc6425 | 26 | #include <algorithm> |
a2fb1b05 ILT |
27 | #include <iostream> |
28 | #include <utility> | |
29 | ||
7e1edb90 | 30 | #include "parameters.h" |
a2fb1b05 | 31 | #include "output.h" |
f6ce93d6 | 32 | #include "symtab.h" |
a3ad94ed | 33 | #include "dynobj.h" |
3151305a | 34 | #include "ehframe.h" |
a2fb1b05 ILT |
35 | #include "layout.h" |
36 | ||
37 | namespace gold | |
38 | { | |
39 | ||
92e059d8 | 40 | // Layout_task_runner methods. |
a2fb1b05 ILT |
41 | |
42 | // Lay out the sections. This is called after all the input objects | |
43 | // have been read. | |
44 | ||
45 | void | |
92e059d8 | 46 | Layout_task_runner::run(Workqueue* workqueue) |
a2fb1b05 | 47 | { |
12e14209 ILT |
48 | off_t file_size = this->layout_->finalize(this->input_objects_, |
49 | this->symtab_); | |
61ba1cf9 ILT |
50 | |
51 | // Now we know the final size of the output file and we know where | |
52 | // each piece of information goes. | |
c51e6221 ILT |
53 | Output_file* of = new Output_file(this->options_, |
54 | this->input_objects_->target()); | |
61ba1cf9 ILT |
55 | of->open(file_size); |
56 | ||
57 | // Queue up the final set of tasks. | |
58 | gold::queue_final_tasks(this->options_, this->input_objects_, | |
12e14209 | 59 | this->symtab_, this->layout_, workqueue, of); |
a2fb1b05 ILT |
60 | } |
61 | ||
62 | // Layout methods. | |
63 | ||
54dc6425 | 64 | Layout::Layout(const General_options& options) |
a3ad94ed | 65 | : options_(options), namepool_(), sympool_(), dynpool_(), signatures_(), |
61ba1cf9 | 66 | section_name_map_(), segment_list_(), section_list_(), |
a3ad94ed | 67 | unattached_section_list_(), special_output_list_(), |
14b31740 | 68 | tls_segment_(NULL), symtab_section_(NULL), |
3151305a | 69 | dynsym_section_(NULL), dynamic_section_(NULL), dynamic_data_(NULL), |
35cdfc9a ILT |
70 | eh_frame_section_(NULL), output_file_size_(-1), |
71 | input_requires_executable_stack_(false), | |
72 | input_with_gnu_stack_note_(false), | |
07f397ab ILT |
73 | input_without_gnu_stack_note_(false), |
74 | have_textrel_(false) | |
54dc6425 ILT |
75 | { |
76 | // Make space for more than enough segments for a typical file. | |
77 | // This is just for efficiency--it's OK if we wind up needing more. | |
a3ad94ed ILT |
78 | this->segment_list_.reserve(12); |
79 | ||
80 | // We expect three unattached Output_data objects: the file header, | |
81 | // the segment headers, and the section headers. | |
82 | this->special_output_list_.reserve(3); | |
54dc6425 ILT |
83 | } |
84 | ||
a2fb1b05 ILT |
85 | // Hash a key we use to look up an output section mapping. |
86 | ||
87 | size_t | |
88 | Layout::Hash_key::operator()(const Layout::Key& k) const | |
89 | { | |
f0641a0b | 90 | return k.first + k.second.first + k.second.second; |
a2fb1b05 ILT |
91 | } |
92 | ||
9e2dcb77 ILT |
93 | // Return whether PREFIX is a prefix of STR. |
94 | ||
95 | static inline bool | |
96 | is_prefix_of(const char* prefix, const char* str) | |
97 | { | |
98 | return strncmp(prefix, str, strlen(prefix)) == 0; | |
99 | } | |
100 | ||
02d2ba74 ILT |
101 | // Returns whether the given section is in the list of |
102 | // debug-sections-used-by-some-version-of-gdb. Currently, | |
103 | // we've checked versions of gdb up to and including 6.7.1. | |
104 | ||
105 | static const char* gdb_sections[] = | |
106 | { ".debug_abbrev", | |
107 | // ".debug_aranges", // not used by gdb as of 6.7.1 | |
108 | ".debug_frame", | |
109 | ".debug_info", | |
110 | ".debug_line", | |
111 | ".debug_loc", | |
112 | ".debug_macinfo", | |
113 | // ".debug_pubnames", // not used by gdb as of 6.7.1 | |
114 | ".debug_ranges", | |
115 | ".debug_str", | |
116 | }; | |
117 | ||
118 | static inline bool | |
119 | is_gdb_debug_section(const char* str) | |
120 | { | |
121 | // We can do this faster: binary search or a hashtable. But why bother? | |
122 | for (size_t i = 0; i < sizeof(gdb_sections)/sizeof(*gdb_sections); ++i) | |
123 | if (strcmp(str, gdb_sections[i]) == 0) | |
124 | return true; | |
125 | return false; | |
126 | } | |
127 | ||
a2fb1b05 ILT |
128 | // Whether to include this section in the link. |
129 | ||
130 | template<int size, bool big_endian> | |
131 | bool | |
730cdc88 | 132 | Layout::include_section(Sized_relobj<size, big_endian>*, const char* name, |
a2fb1b05 ILT |
133 | const elfcpp::Shdr<size, big_endian>& shdr) |
134 | { | |
135 | // Some section types are never linked. Some are only linked when | |
136 | // doing a relocateable link. | |
137 | switch (shdr.get_sh_type()) | |
138 | { | |
139 | case elfcpp::SHT_NULL: | |
140 | case elfcpp::SHT_SYMTAB: | |
141 | case elfcpp::SHT_DYNSYM: | |
142 | case elfcpp::SHT_STRTAB: | |
143 | case elfcpp::SHT_HASH: | |
144 | case elfcpp::SHT_DYNAMIC: | |
145 | case elfcpp::SHT_SYMTAB_SHNDX: | |
146 | return false; | |
147 | ||
148 | case elfcpp::SHT_RELA: | |
149 | case elfcpp::SHT_REL: | |
150 | case elfcpp::SHT_GROUP: | |
7e1edb90 | 151 | return parameters->output_is_object(); |
a2fb1b05 | 152 | |
9e2dcb77 ILT |
153 | case elfcpp::SHT_PROGBITS: |
154 | if (parameters->strip_debug() | |
155 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0) | |
156 | { | |
157 | // Debugging sections can only be recognized by name. | |
158 | if (is_prefix_of(".debug", name) | |
159 | || is_prefix_of(".gnu.linkonce.wi.", name) | |
160 | || is_prefix_of(".line", name) | |
161 | || is_prefix_of(".stab", name)) | |
162 | return false; | |
163 | } | |
02d2ba74 ILT |
164 | if (parameters->strip_debug_gdb() |
165 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0) | |
166 | { | |
167 | // Debugging sections can only be recognized by name. | |
168 | if (is_prefix_of(".debug", name) | |
169 | && !is_gdb_debug_section(name)) | |
170 | return false; | |
171 | } | |
9e2dcb77 ILT |
172 | return true; |
173 | ||
a2fb1b05 | 174 | default: |
a2fb1b05 ILT |
175 | return true; |
176 | } | |
177 | } | |
178 | ||
ead1e424 | 179 | // Return an output section named NAME, or NULL if there is none. |
a2fb1b05 | 180 | |
a2fb1b05 | 181 | Output_section* |
ead1e424 | 182 | Layout::find_output_section(const char* name) const |
a2fb1b05 | 183 | { |
ead1e424 ILT |
184 | for (Section_name_map::const_iterator p = this->section_name_map_.begin(); |
185 | p != this->section_name_map_.end(); | |
186 | ++p) | |
f0641a0b | 187 | if (strcmp(p->second->name(), name) == 0) |
ead1e424 ILT |
188 | return p->second; |
189 | return NULL; | |
190 | } | |
a2fb1b05 | 191 | |
ead1e424 ILT |
192 | // Return an output segment of type TYPE, with segment flags SET set |
193 | // and segment flags CLEAR clear. Return NULL if there is none. | |
a2fb1b05 | 194 | |
ead1e424 ILT |
195 | Output_segment* |
196 | Layout::find_output_segment(elfcpp::PT type, elfcpp::Elf_Word set, | |
197 | elfcpp::Elf_Word clear) const | |
198 | { | |
199 | for (Segment_list::const_iterator p = this->segment_list_.begin(); | |
200 | p != this->segment_list_.end(); | |
201 | ++p) | |
202 | if (static_cast<elfcpp::PT>((*p)->type()) == type | |
203 | && ((*p)->flags() & set) == set | |
204 | && ((*p)->flags() & clear) == 0) | |
205 | return *p; | |
206 | return NULL; | |
207 | } | |
a2fb1b05 | 208 | |
ead1e424 ILT |
209 | // Return the output section to use for section NAME with type TYPE |
210 | // and section flags FLAGS. | |
a2fb1b05 | 211 | |
ead1e424 | 212 | Output_section* |
f0641a0b ILT |
213 | Layout::get_output_section(const char* name, Stringpool::Key name_key, |
214 | elfcpp::Elf_Word type, elfcpp::Elf_Xword flags) | |
ead1e424 ILT |
215 | { |
216 | // We should ignore some flags. | |
217 | flags &= ~ (elfcpp::SHF_INFO_LINK | |
218 | | elfcpp::SHF_LINK_ORDER | |
b8e6aad9 ILT |
219 | | elfcpp::SHF_GROUP |
220 | | elfcpp::SHF_MERGE | |
221 | | elfcpp::SHF_STRINGS); | |
a2fb1b05 | 222 | |
f0641a0b | 223 | const Key key(name_key, std::make_pair(type, flags)); |
a2fb1b05 ILT |
224 | const std::pair<Key, Output_section*> v(key, NULL); |
225 | std::pair<Section_name_map::iterator, bool> ins( | |
226 | this->section_name_map_.insert(v)); | |
227 | ||
a2fb1b05 | 228 | if (!ins.second) |
ead1e424 | 229 | return ins.first->second; |
a2fb1b05 ILT |
230 | else |
231 | { | |
232 | // This is the first time we've seen this name/type/flags | |
233 | // combination. | |
ead1e424 | 234 | Output_section* os = this->make_output_section(name, type, flags); |
a2fb1b05 | 235 | ins.first->second = os; |
ead1e424 | 236 | return os; |
a2fb1b05 | 237 | } |
ead1e424 ILT |
238 | } |
239 | ||
240 | // Return the output section to use for input section SHNDX, with name | |
730cdc88 ILT |
241 | // NAME, with header HEADER, from object OBJECT. RELOC_SHNDX is the |
242 | // index of a relocation section which applies to this section, or 0 | |
243 | // if none, or -1U if more than one. RELOC_TYPE is the type of the | |
244 | // relocation section if there is one. Set *OFF to the offset of this | |
245 | // input section without the output section. Return NULL if the | |
246 | // section should be discarded. Set *OFF to -1 if the section | |
247 | // contents should not be written directly to the output file, but | |
248 | // will instead receive special handling. | |
ead1e424 ILT |
249 | |
250 | template<int size, bool big_endian> | |
251 | Output_section* | |
730cdc88 ILT |
252 | Layout::layout(Sized_relobj<size, big_endian>* object, unsigned int shndx, |
253 | const char* name, const elfcpp::Shdr<size, big_endian>& shdr, | |
254 | unsigned int reloc_shndx, unsigned int, off_t* off) | |
ead1e424 ILT |
255 | { |
256 | if (!this->include_section(object, name, shdr)) | |
257 | return NULL; | |
258 | ||
259 | // If we are not doing a relocateable link, choose the name to use | |
260 | // for the output section. | |
261 | size_t len = strlen(name); | |
7e1edb90 | 262 | if (!parameters->output_is_object()) |
ead1e424 ILT |
263 | name = Layout::output_section_name(name, &len); |
264 | ||
265 | // FIXME: Handle SHF_OS_NONCONFORMING here. | |
266 | ||
267 | // Canonicalize the section name. | |
f0641a0b | 268 | Stringpool::Key name_key; |
cfd73a4e | 269 | name = this->namepool_.add_prefix(name, len, &name_key); |
ead1e424 ILT |
270 | |
271 | // Find the output section. The output section is selected based on | |
272 | // the section name, type, and flags. | |
f0641a0b ILT |
273 | Output_section* os = this->get_output_section(name, name_key, |
274 | shdr.get_sh_type(), | |
ead1e424 | 275 | shdr.get_sh_flags()); |
a2fb1b05 ILT |
276 | |
277 | // FIXME: Handle SHF_LINK_ORDER somewhere. | |
278 | ||
730cdc88 | 279 | *off = os->add_input_section(object, shndx, name, shdr, reloc_shndx); |
a2fb1b05 ILT |
280 | |
281 | return os; | |
282 | } | |
283 | ||
730cdc88 ILT |
284 | // Special GNU handling of sections name .eh_frame. They will |
285 | // normally hold exception frame data as defined by the C++ ABI | |
286 | // (http://codesourcery.com/cxx-abi/). | |
3151305a ILT |
287 | |
288 | template<int size, bool big_endian> | |
730cdc88 ILT |
289 | Output_section* |
290 | Layout::layout_eh_frame(Sized_relobj<size, big_endian>* object, | |
291 | const unsigned char* symbols, | |
292 | off_t symbols_size, | |
293 | const unsigned char* symbol_names, | |
294 | off_t symbol_names_size, | |
3151305a | 295 | unsigned int shndx, |
3151305a | 296 | const elfcpp::Shdr<size, big_endian>& shdr, |
730cdc88 ILT |
297 | unsigned int reloc_shndx, unsigned int reloc_type, |
298 | off_t* off) | |
3151305a | 299 | { |
730cdc88 ILT |
300 | gold_assert(shdr.get_sh_type() == elfcpp::SHT_PROGBITS); |
301 | gold_assert(shdr.get_sh_flags() == elfcpp::SHF_ALLOC); | |
302 | ||
303 | Stringpool::Key name_key; | |
304 | const char* name = this->namepool_.add(".eh_frame", false, &name_key); | |
305 | ||
306 | Output_section* os = this->get_output_section(name, name_key, | |
307 | elfcpp::SHT_PROGBITS, | |
308 | elfcpp::SHF_ALLOC); | |
309 | ||
3151305a ILT |
310 | if (this->eh_frame_section_ == NULL) |
311 | { | |
312 | this->eh_frame_section_ = os; | |
730cdc88 ILT |
313 | this->eh_frame_data_ = new Eh_frame(); |
314 | os->add_output_section_data(this->eh_frame_data_); | |
3151305a ILT |
315 | |
316 | if (this->options_.create_eh_frame_hdr()) | |
317 | { | |
318 | Stringpool::Key hdr_name_key; | |
319 | const char* hdr_name = this->namepool_.add(".eh_frame_hdr", | |
cfd73a4e | 320 | false, |
3151305a ILT |
321 | &hdr_name_key); |
322 | Output_section* hdr_os = | |
323 | this->get_output_section(hdr_name, hdr_name_key, | |
324 | elfcpp::SHT_PROGBITS, | |
325 | elfcpp::SHF_ALLOC); | |
326 | ||
730cdc88 | 327 | Eh_frame_hdr* hdr_posd = new Eh_frame_hdr(os, this->eh_frame_data_); |
3151305a ILT |
328 | hdr_os->add_output_section_data(hdr_posd); |
329 | ||
730cdc88 ILT |
330 | hdr_os->set_after_input_sections(); |
331 | ||
3151305a ILT |
332 | Output_segment* hdr_oseg = |
333 | new Output_segment(elfcpp::PT_GNU_EH_FRAME, elfcpp::PF_R); | |
334 | this->segment_list_.push_back(hdr_oseg); | |
335 | hdr_oseg->add_output_section(hdr_os, elfcpp::PF_R); | |
730cdc88 ILT |
336 | |
337 | this->eh_frame_data_->set_eh_frame_hdr(hdr_posd); | |
3151305a ILT |
338 | } |
339 | } | |
340 | ||
341 | gold_assert(this->eh_frame_section_ == os); | |
342 | ||
730cdc88 ILT |
343 | if (this->eh_frame_data_->add_ehframe_input_section(object, |
344 | symbols, | |
345 | symbols_size, | |
346 | symbol_names, | |
347 | symbol_names_size, | |
348 | shndx, | |
349 | reloc_shndx, | |
350 | reloc_type)) | |
351 | *off = -1; | |
352 | else | |
353 | { | |
354 | // We couldn't handle this .eh_frame section for some reason. | |
355 | // Add it as a normal section. | |
356 | *off = os->add_input_section(object, shndx, name, shdr, reloc_shndx); | |
357 | } | |
358 | ||
359 | return os; | |
3151305a ILT |
360 | } |
361 | ||
ead1e424 ILT |
362 | // Add POSD to an output section using NAME, TYPE, and FLAGS. |
363 | ||
364 | void | |
365 | Layout::add_output_section_data(const char* name, elfcpp::Elf_Word type, | |
366 | elfcpp::Elf_Xword flags, | |
367 | Output_section_data* posd) | |
368 | { | |
369 | // Canonicalize the name. | |
f0641a0b | 370 | Stringpool::Key name_key; |
cfd73a4e | 371 | name = this->namepool_.add(name, true, &name_key); |
ead1e424 | 372 | |
f0641a0b | 373 | Output_section* os = this->get_output_section(name, name_key, type, flags); |
ead1e424 ILT |
374 | os->add_output_section_data(posd); |
375 | } | |
376 | ||
a2fb1b05 ILT |
377 | // Map section flags to segment flags. |
378 | ||
379 | elfcpp::Elf_Word | |
380 | Layout::section_flags_to_segment(elfcpp::Elf_Xword flags) | |
381 | { | |
382 | elfcpp::Elf_Word ret = elfcpp::PF_R; | |
383 | if ((flags & elfcpp::SHF_WRITE) != 0) | |
384 | ret |= elfcpp::PF_W; | |
385 | if ((flags & elfcpp::SHF_EXECINSTR) != 0) | |
386 | ret |= elfcpp::PF_X; | |
387 | return ret; | |
388 | } | |
389 | ||
390 | // Make a new Output_section, and attach it to segments as | |
391 | // appropriate. | |
392 | ||
393 | Output_section* | |
394 | Layout::make_output_section(const char* name, elfcpp::Elf_Word type, | |
395 | elfcpp::Elf_Xword flags) | |
396 | { | |
b8e6aad9 | 397 | Output_section* os = new Output_section(name, type, flags); |
a3ad94ed | 398 | this->section_list_.push_back(os); |
a2fb1b05 ILT |
399 | |
400 | if ((flags & elfcpp::SHF_ALLOC) == 0) | |
a3ad94ed | 401 | this->unattached_section_list_.push_back(os); |
a2fb1b05 ILT |
402 | else |
403 | { | |
404 | // This output section goes into a PT_LOAD segment. | |
405 | ||
406 | elfcpp::Elf_Word seg_flags = Layout::section_flags_to_segment(flags); | |
407 | ||
408 | // The only thing we really care about for PT_LOAD segments is | |
409 | // whether or not they are writable, so that is how we search | |
410 | // for them. People who need segments sorted on some other | |
411 | // basis will have to wait until we implement a mechanism for | |
412 | // them to describe the segments they want. | |
413 | ||
414 | Segment_list::const_iterator p; | |
415 | for (p = this->segment_list_.begin(); | |
416 | p != this->segment_list_.end(); | |
417 | ++p) | |
418 | { | |
419 | if ((*p)->type() == elfcpp::PT_LOAD | |
420 | && ((*p)->flags() & elfcpp::PF_W) == (seg_flags & elfcpp::PF_W)) | |
421 | { | |
75f65a3e | 422 | (*p)->add_output_section(os, seg_flags); |
a2fb1b05 ILT |
423 | break; |
424 | } | |
425 | } | |
426 | ||
427 | if (p == this->segment_list_.end()) | |
428 | { | |
429 | Output_segment* oseg = new Output_segment(elfcpp::PT_LOAD, | |
430 | seg_flags); | |
431 | this->segment_list_.push_back(oseg); | |
75f65a3e | 432 | oseg->add_output_section(os, seg_flags); |
a2fb1b05 ILT |
433 | } |
434 | ||
435 | // If we see a loadable SHT_NOTE section, we create a PT_NOTE | |
436 | // segment. | |
437 | if (type == elfcpp::SHT_NOTE) | |
438 | { | |
439 | // See if we already have an equivalent PT_NOTE segment. | |
440 | for (p = this->segment_list_.begin(); | |
441 | p != segment_list_.end(); | |
442 | ++p) | |
443 | { | |
444 | if ((*p)->type() == elfcpp::PT_NOTE | |
445 | && (((*p)->flags() & elfcpp::PF_W) | |
446 | == (seg_flags & elfcpp::PF_W))) | |
447 | { | |
75f65a3e | 448 | (*p)->add_output_section(os, seg_flags); |
a2fb1b05 ILT |
449 | break; |
450 | } | |
451 | } | |
452 | ||
453 | if (p == this->segment_list_.end()) | |
454 | { | |
455 | Output_segment* oseg = new Output_segment(elfcpp::PT_NOTE, | |
456 | seg_flags); | |
457 | this->segment_list_.push_back(oseg); | |
75f65a3e | 458 | oseg->add_output_section(os, seg_flags); |
a2fb1b05 ILT |
459 | } |
460 | } | |
54dc6425 ILT |
461 | |
462 | // If we see a loadable SHF_TLS section, we create a PT_TLS | |
92e059d8 | 463 | // segment. There can only be one such segment. |
54dc6425 ILT |
464 | if ((flags & elfcpp::SHF_TLS) != 0) |
465 | { | |
92e059d8 | 466 | if (this->tls_segment_ == NULL) |
54dc6425 | 467 | { |
92e059d8 ILT |
468 | this->tls_segment_ = new Output_segment(elfcpp::PT_TLS, |
469 | seg_flags); | |
470 | this->segment_list_.push_back(this->tls_segment_); | |
54dc6425 | 471 | } |
92e059d8 | 472 | this->tls_segment_->add_output_section(os, seg_flags); |
54dc6425 | 473 | } |
a2fb1b05 ILT |
474 | } |
475 | ||
476 | return os; | |
477 | } | |
478 | ||
35cdfc9a ILT |
479 | // Handle the .note.GNU-stack section at layout time. SEEN_GNU_STACK |
480 | // is whether we saw a .note.GNU-stack section in the object file. | |
481 | // GNU_STACK_FLAGS is the section flags. The flags give the | |
482 | // protection required for stack memory. We record this in an | |
483 | // executable as a PT_GNU_STACK segment. If an object file does not | |
484 | // have a .note.GNU-stack segment, we must assume that it is an old | |
485 | // object. On some targets that will force an executable stack. | |
486 | ||
487 | void | |
488 | Layout::layout_gnu_stack(bool seen_gnu_stack, uint64_t gnu_stack_flags) | |
489 | { | |
490 | if (!seen_gnu_stack) | |
491 | this->input_without_gnu_stack_note_ = true; | |
492 | else | |
493 | { | |
494 | this->input_with_gnu_stack_note_ = true; | |
495 | if ((gnu_stack_flags & elfcpp::SHF_EXECINSTR) != 0) | |
496 | this->input_requires_executable_stack_ = true; | |
497 | } | |
498 | } | |
499 | ||
a3ad94ed ILT |
500 | // Create the dynamic sections which are needed before we read the |
501 | // relocs. | |
502 | ||
503 | void | |
504 | Layout::create_initial_dynamic_sections(const Input_objects* input_objects, | |
505 | Symbol_table* symtab) | |
506 | { | |
436ca963 | 507 | if (parameters->doing_static_link()) |
a3ad94ed ILT |
508 | return; |
509 | ||
cfd73a4e | 510 | const char* dynamic_name = this->namepool_.add(".dynamic", false, NULL); |
a3ad94ed ILT |
511 | this->dynamic_section_ = this->make_output_section(dynamic_name, |
512 | elfcpp::SHT_DYNAMIC, | |
513 | (elfcpp::SHF_ALLOC | |
514 | | elfcpp::SHF_WRITE)); | |
515 | ||
14b31740 | 516 | symtab->define_in_output_data(input_objects->target(), "_DYNAMIC", NULL, |
a3ad94ed ILT |
517 | this->dynamic_section_, 0, 0, |
518 | elfcpp::STT_OBJECT, elfcpp::STB_LOCAL, | |
519 | elfcpp::STV_HIDDEN, 0, false, false); | |
16649710 | 520 | |
9025d29d | 521 | this->dynamic_data_ = new Output_data_dynamic(&this->dynpool_); |
16649710 ILT |
522 | |
523 | this->dynamic_section_->add_output_section_data(this->dynamic_data_); | |
a3ad94ed ILT |
524 | } |
525 | ||
bfd58944 ILT |
526 | // For each output section whose name can be represented as C symbol, |
527 | // define __start and __stop symbols for the section. This is a GNU | |
528 | // extension. | |
529 | ||
530 | void | |
531 | Layout::define_section_symbols(Symbol_table* symtab, const Target* target) | |
532 | { | |
533 | for (Section_list::const_iterator p = this->section_list_.begin(); | |
534 | p != this->section_list_.end(); | |
535 | ++p) | |
536 | { | |
537 | const char* const name = (*p)->name(); | |
538 | if (name[strspn(name, | |
539 | ("0123456789" | |
540 | "ABCDEFGHIJKLMNOPWRSTUVWXYZ" | |
541 | "abcdefghijklmnopqrstuvwxyz" | |
542 | "_"))] | |
543 | == '\0') | |
544 | { | |
545 | const std::string name_string(name); | |
546 | const std::string start_name("__start_" + name_string); | |
547 | const std::string stop_name("__stop_" + name_string); | |
548 | ||
549 | symtab->define_in_output_data(target, | |
550 | start_name.c_str(), | |
551 | NULL, // version | |
552 | *p, | |
553 | 0, // value | |
554 | 0, // symsize | |
555 | elfcpp::STT_NOTYPE, | |
556 | elfcpp::STB_GLOBAL, | |
557 | elfcpp::STV_DEFAULT, | |
558 | 0, // nonvis | |
559 | false, // offset_is_from_end | |
560 | false); // only_if_ref | |
561 | ||
562 | symtab->define_in_output_data(target, | |
563 | stop_name.c_str(), | |
564 | NULL, // version | |
565 | *p, | |
566 | 0, // value | |
567 | 0, // symsize | |
568 | elfcpp::STT_NOTYPE, | |
569 | elfcpp::STB_GLOBAL, | |
570 | elfcpp::STV_DEFAULT, | |
571 | 0, // nonvis | |
572 | true, // offset_is_from_end | |
573 | false); // only_if_ref | |
574 | } | |
575 | } | |
576 | } | |
577 | ||
75f65a3e ILT |
578 | // Find the first read-only PT_LOAD segment, creating one if |
579 | // necessary. | |
54dc6425 | 580 | |
75f65a3e ILT |
581 | Output_segment* |
582 | Layout::find_first_load_seg() | |
54dc6425 | 583 | { |
75f65a3e ILT |
584 | for (Segment_list::const_iterator p = this->segment_list_.begin(); |
585 | p != this->segment_list_.end(); | |
586 | ++p) | |
587 | { | |
588 | if ((*p)->type() == elfcpp::PT_LOAD | |
589 | && ((*p)->flags() & elfcpp::PF_R) != 0 | |
590 | && ((*p)->flags() & elfcpp::PF_W) == 0) | |
591 | return *p; | |
592 | } | |
593 | ||
594 | Output_segment* load_seg = new Output_segment(elfcpp::PT_LOAD, elfcpp::PF_R); | |
595 | this->segment_list_.push_back(load_seg); | |
596 | return load_seg; | |
54dc6425 ILT |
597 | } |
598 | ||
599 | // Finalize the layout. When this is called, we have created all the | |
600 | // output sections and all the output segments which are based on | |
601 | // input sections. We have several things to do, and we have to do | |
602 | // them in the right order, so that we get the right results correctly | |
603 | // and efficiently. | |
604 | ||
605 | // 1) Finalize the list of output segments and create the segment | |
606 | // table header. | |
607 | ||
608 | // 2) Finalize the dynamic symbol table and associated sections. | |
609 | ||
610 | // 3) Determine the final file offset of all the output segments. | |
611 | ||
612 | // 4) Determine the final file offset of all the SHF_ALLOC output | |
613 | // sections. | |
614 | ||
75f65a3e ILT |
615 | // 5) Create the symbol table sections and the section name table |
616 | // section. | |
617 | ||
618 | // 6) Finalize the symbol table: set symbol values to their final | |
54dc6425 ILT |
619 | // value and make a final determination of which symbols are going |
620 | // into the output symbol table. | |
621 | ||
54dc6425 ILT |
622 | // 7) Create the section table header. |
623 | ||
624 | // 8) Determine the final file offset of all the output sections which | |
625 | // are not SHF_ALLOC, including the section table header. | |
626 | ||
627 | // 9) Finalize the ELF file header. | |
628 | ||
75f65a3e ILT |
629 | // This function returns the size of the output file. |
630 | ||
631 | off_t | |
632 | Layout::finalize(const Input_objects* input_objects, Symbol_table* symtab) | |
54dc6425 | 633 | { |
5a6f7e2d | 634 | Target* const target = input_objects->target(); |
dbe717ef | 635 | |
7e1edb90 | 636 | target->finalize_sections(this); |
5a6f7e2d | 637 | |
35cdfc9a ILT |
638 | this->create_gold_note(); |
639 | this->create_executable_stack_info(target); | |
4f211c8b | 640 | |
dbe717ef | 641 | Output_segment* phdr_seg = NULL; |
436ca963 | 642 | if (!parameters->doing_static_link()) |
54dc6425 | 643 | { |
dbe717ef ILT |
644 | // There was a dynamic object in the link. We need to create |
645 | // some information for the dynamic linker. | |
646 | ||
647 | // Create the PT_PHDR segment which will hold the program | |
648 | // headers. | |
649 | phdr_seg = new Output_segment(elfcpp::PT_PHDR, elfcpp::PF_R); | |
650 | this->segment_list_.push_back(phdr_seg); | |
651 | ||
14b31740 ILT |
652 | // Create the dynamic symbol table, including the hash table. |
653 | Output_section* dynstr; | |
654 | std::vector<Symbol*> dynamic_symbols; | |
655 | unsigned int local_dynamic_count; | |
656 | Versions versions; | |
657 | this->create_dynamic_symtab(target, symtab, &dynstr, | |
658 | &local_dynamic_count, &dynamic_symbols, | |
659 | &versions); | |
dbe717ef ILT |
660 | |
661 | // Create the .interp section to hold the name of the | |
662 | // interpreter, and put it in a PT_INTERP segment. | |
96f2030e ILT |
663 | if (!parameters->output_is_shared()) |
664 | this->create_interp(target); | |
a3ad94ed ILT |
665 | |
666 | // Finish the .dynamic section to hold the dynamic data, and put | |
667 | // it in a PT_DYNAMIC segment. | |
16649710 | 668 | this->finish_dynamic_section(input_objects, symtab); |
14b31740 ILT |
669 | |
670 | // We should have added everything we need to the dynamic string | |
671 | // table. | |
672 | this->dynpool_.set_string_offsets(); | |
673 | ||
674 | // Create the version sections. We can't do this until the | |
675 | // dynamic string table is complete. | |
46fe1623 | 676 | this->create_version_sections(&versions, symtab, local_dynamic_count, |
14b31740 | 677 | dynamic_symbols, dynstr); |
54dc6425 ILT |
678 | } |
679 | ||
680 | // FIXME: Handle PT_GNU_STACK. | |
681 | ||
75f65a3e ILT |
682 | Output_segment* load_seg = this->find_first_load_seg(); |
683 | ||
684 | // Lay out the segment headers. | |
75f65a3e | 685 | Output_segment_headers* segment_headers; |
9025d29d | 686 | segment_headers = new Output_segment_headers(this->segment_list_); |
75f65a3e | 687 | load_seg->add_initial_output_data(segment_headers); |
61ba1cf9 | 688 | this->special_output_list_.push_back(segment_headers); |
dbe717ef ILT |
689 | if (phdr_seg != NULL) |
690 | phdr_seg->add_initial_output_data(segment_headers); | |
75f65a3e ILT |
691 | |
692 | // Lay out the file header. | |
693 | Output_file_header* file_header; | |
9025d29d | 694 | file_header = new Output_file_header(target, symtab, segment_headers); |
75f65a3e | 695 | load_seg->add_initial_output_data(file_header); |
61ba1cf9 | 696 | this->special_output_list_.push_back(file_header); |
75f65a3e | 697 | |
ead1e424 ILT |
698 | // We set the output section indexes in set_segment_offsets and |
699 | // set_section_offsets. | |
700 | unsigned int shndx = 1; | |
701 | ||
702 | // Set the file offsets of all the segments, and all the sections | |
703 | // they contain. | |
a3ad94ed | 704 | off_t off = this->set_segment_offsets(target, load_seg, &shndx); |
75f65a3e | 705 | |
dba5a01f ILT |
706 | // Set the file offsets of all the data sections not associated with |
707 | // segments. This makes sure that debug sections have their offsets | |
708 | // before symbols are finalized. | |
86887060 | 709 | off = this->set_section_offsets(off, true); |
dba5a01f | 710 | |
75f65a3e | 711 | // Create the symbol table sections. |
9025d29d | 712 | this->create_symtab_sections(input_objects, symtab, &off); |
75f65a3e ILT |
713 | |
714 | // Create the .shstrtab section. | |
715 | Output_section* shstrtab_section = this->create_shstrtab(); | |
716 | ||
dba5a01f | 717 | // Set the file offsets of all the non-data sections not associated with |
75f65a3e | 718 | // segments. |
86887060 ILT |
719 | off = this->set_section_offsets(off, false); |
720 | ||
721 | // Now that all sections have been created, set the section indexes. | |
722 | shndx = this->set_section_indexes(shndx); | |
ead1e424 | 723 | |
75f65a3e | 724 | // Create the section table header. |
9025d29d | 725 | Output_section_headers* oshdrs = this->create_shdrs(&off); |
75f65a3e ILT |
726 | |
727 | file_header->set_section_info(oshdrs, shstrtab_section); | |
728 | ||
729 | // Now we know exactly where everything goes in the output file. | |
a3ad94ed | 730 | Output_data::layout_complete(); |
75f65a3e | 731 | |
e44fcf3b ILT |
732 | this->output_file_size_ = off; |
733 | ||
75f65a3e ILT |
734 | return off; |
735 | } | |
736 | ||
4f211c8b ILT |
737 | // Create a .note section for an executable or shared library. This |
738 | // records the version of gold used to create the binary. | |
739 | ||
740 | void | |
35cdfc9a | 741 | Layout::create_gold_note() |
4f211c8b ILT |
742 | { |
743 | if (parameters->output_is_object()) | |
744 | return; | |
745 | ||
e2305dc0 ILT |
746 | // Authorities all agree that the values in a .note field should |
747 | // be aligned on 4-byte boundaries for 32-bit binaries. However, | |
748 | // they differ on what the alignment is for 64-bit binaries. | |
749 | // The GABI says unambiguously they take 8-byte alignment: | |
750 | // http://sco.com/developers/gabi/latest/ch5.pheader.html#note_section | |
751 | // Other documentation says alignment should always be 4 bytes: | |
752 | // http://www.netbsd.org/docs/kernel/elf-notes.html#note-format | |
753 | // GNU ld and GNU readelf both support the latter (at least as of | |
754 | // version 2.16.91), and glibc always generates the latter for | |
755 | // .note.ABI-tag (as of version 1.6), so that's the one we go with | |
756 | // here. | |
35cdfc9a | 757 | #ifdef GABI_FORMAT_FOR_DOTNOTE_SECTION // This is not defined by default. |
4f211c8b | 758 | const int size = parameters->get_size(); |
e2305dc0 ILT |
759 | #else |
760 | const int size = 32; | |
761 | #endif | |
4f211c8b ILT |
762 | |
763 | // The contents of the .note section. | |
764 | const char* name = "GNU"; | |
765 | std::string desc(std::string("gold ") + gold::get_version_string()); | |
766 | size_t namesz = strlen(name) + 1; | |
767 | size_t aligned_namesz = align_address(namesz, size / 8); | |
768 | size_t descsz = desc.length() + 1; | |
769 | size_t aligned_descsz = align_address(descsz, size / 8); | |
770 | const int note_type = 4; | |
771 | ||
772 | size_t notesz = 3 * (size / 8) + aligned_namesz + aligned_descsz; | |
773 | ||
774 | unsigned char buffer[128]; | |
775 | gold_assert(sizeof buffer >= notesz); | |
776 | memset(buffer, 0, notesz); | |
777 | ||
778 | bool is_big_endian = parameters->is_big_endian(); | |
779 | ||
780 | if (size == 32) | |
781 | { | |
782 | if (!is_big_endian) | |
783 | { | |
784 | elfcpp::Swap<32, false>::writeval(buffer, namesz); | |
785 | elfcpp::Swap<32, false>::writeval(buffer + 4, descsz); | |
786 | elfcpp::Swap<32, false>::writeval(buffer + 8, note_type); | |
787 | } | |
788 | else | |
789 | { | |
790 | elfcpp::Swap<32, true>::writeval(buffer, namesz); | |
791 | elfcpp::Swap<32, true>::writeval(buffer + 4, descsz); | |
792 | elfcpp::Swap<32, true>::writeval(buffer + 8, note_type); | |
793 | } | |
794 | } | |
795 | else if (size == 64) | |
796 | { | |
797 | if (!is_big_endian) | |
798 | { | |
799 | elfcpp::Swap<64, false>::writeval(buffer, namesz); | |
800 | elfcpp::Swap<64, false>::writeval(buffer + 8, descsz); | |
801 | elfcpp::Swap<64, false>::writeval(buffer + 16, note_type); | |
802 | } | |
803 | else | |
804 | { | |
805 | elfcpp::Swap<64, true>::writeval(buffer, namesz); | |
806 | elfcpp::Swap<64, true>::writeval(buffer + 8, descsz); | |
807 | elfcpp::Swap<64, true>::writeval(buffer + 16, note_type); | |
808 | } | |
809 | } | |
810 | else | |
811 | gold_unreachable(); | |
812 | ||
813 | memcpy(buffer + 3 * (size / 8), name, namesz); | |
814 | memcpy(buffer + 3 * (size / 8) + aligned_namesz, desc.data(), descsz); | |
815 | ||
cfd73a4e | 816 | const char* note_name = this->namepool_.add(".note", false, NULL); |
4f211c8b ILT |
817 | Output_section* os = this->make_output_section(note_name, |
818 | elfcpp::SHT_NOTE, | |
819 | 0); | |
820 | Output_section_data* posd = new Output_data_const(buffer, notesz, | |
821 | size / 8); | |
822 | os->add_output_section_data(posd); | |
823 | } | |
824 | ||
35cdfc9a ILT |
825 | // Record whether the stack should be executable. This can be set |
826 | // from the command line using the -z execstack or -z noexecstack | |
827 | // options. Otherwise, if any input file has a .note.GNU-stack | |
828 | // section with the SHF_EXECINSTR flag set, the stack should be | |
829 | // executable. Otherwise, if at least one input file a | |
830 | // .note.GNU-stack section, and some input file has no .note.GNU-stack | |
831 | // section, we use the target default for whether the stack should be | |
832 | // executable. Otherwise, we don't generate a stack note. When | |
833 | // generating a object file, we create a .note.GNU-stack section with | |
834 | // the appropriate marking. When generating an executable or shared | |
835 | // library, we create a PT_GNU_STACK segment. | |
836 | ||
837 | void | |
838 | Layout::create_executable_stack_info(const Target* target) | |
839 | { | |
840 | bool is_stack_executable; | |
841 | if (this->options_.is_execstack_set()) | |
842 | is_stack_executable = this->options_.is_stack_executable(); | |
843 | else if (!this->input_with_gnu_stack_note_) | |
844 | return; | |
845 | else | |
846 | { | |
847 | if (this->input_requires_executable_stack_) | |
848 | is_stack_executable = true; | |
849 | else if (this->input_without_gnu_stack_note_) | |
850 | is_stack_executable = target->is_default_stack_executable(); | |
851 | else | |
852 | is_stack_executable = false; | |
853 | } | |
854 | ||
855 | if (parameters->output_is_object()) | |
856 | { | |
857 | const char* name = this->namepool_.add(".note.GNU-stack", false, NULL); | |
858 | elfcpp::Elf_Xword flags = 0; | |
859 | if (is_stack_executable) | |
860 | flags |= elfcpp::SHF_EXECINSTR; | |
861 | this->make_output_section(name, elfcpp::SHT_PROGBITS, flags); | |
862 | } | |
863 | else | |
864 | { | |
865 | int flags = elfcpp::PF_R | elfcpp::PF_W; | |
866 | if (is_stack_executable) | |
867 | flags |= elfcpp::PF_X; | |
868 | Output_segment* oseg = new Output_segment(elfcpp::PT_GNU_STACK, flags); | |
869 | this->segment_list_.push_back(oseg); | |
870 | } | |
871 | } | |
872 | ||
75f65a3e ILT |
873 | // Return whether SEG1 should be before SEG2 in the output file. This |
874 | // is based entirely on the segment type and flags. When this is | |
875 | // called the segment addresses has normally not yet been set. | |
876 | ||
877 | bool | |
878 | Layout::segment_precedes(const Output_segment* seg1, | |
879 | const Output_segment* seg2) | |
880 | { | |
881 | elfcpp::Elf_Word type1 = seg1->type(); | |
882 | elfcpp::Elf_Word type2 = seg2->type(); | |
883 | ||
884 | // The single PT_PHDR segment is required to precede any loadable | |
885 | // segment. We simply make it always first. | |
886 | if (type1 == elfcpp::PT_PHDR) | |
887 | { | |
a3ad94ed | 888 | gold_assert(type2 != elfcpp::PT_PHDR); |
75f65a3e ILT |
889 | return true; |
890 | } | |
891 | if (type2 == elfcpp::PT_PHDR) | |
892 | return false; | |
893 | ||
894 | // The single PT_INTERP segment is required to precede any loadable | |
895 | // segment. We simply make it always second. | |
896 | if (type1 == elfcpp::PT_INTERP) | |
897 | { | |
a3ad94ed | 898 | gold_assert(type2 != elfcpp::PT_INTERP); |
75f65a3e ILT |
899 | return true; |
900 | } | |
901 | if (type2 == elfcpp::PT_INTERP) | |
902 | return false; | |
903 | ||
904 | // We then put PT_LOAD segments before any other segments. | |
905 | if (type1 == elfcpp::PT_LOAD && type2 != elfcpp::PT_LOAD) | |
906 | return true; | |
907 | if (type2 == elfcpp::PT_LOAD && type1 != elfcpp::PT_LOAD) | |
908 | return false; | |
909 | ||
92e059d8 ILT |
910 | // We put the PT_TLS segment last, because that is where the dynamic |
911 | // linker expects to find it (this is just for efficiency; other | |
912 | // positions would also work correctly). | |
913 | if (type1 == elfcpp::PT_TLS && type2 != elfcpp::PT_TLS) | |
914 | return false; | |
915 | if (type2 == elfcpp::PT_TLS && type1 != elfcpp::PT_TLS) | |
916 | return true; | |
917 | ||
75f65a3e ILT |
918 | const elfcpp::Elf_Word flags1 = seg1->flags(); |
919 | const elfcpp::Elf_Word flags2 = seg2->flags(); | |
920 | ||
921 | // The order of non-PT_LOAD segments is unimportant. We simply sort | |
922 | // by the numeric segment type and flags values. There should not | |
923 | // be more than one segment with the same type and flags. | |
924 | if (type1 != elfcpp::PT_LOAD) | |
925 | { | |
926 | if (type1 != type2) | |
927 | return type1 < type2; | |
a3ad94ed | 928 | gold_assert(flags1 != flags2); |
75f65a3e ILT |
929 | return flags1 < flags2; |
930 | } | |
931 | ||
932 | // We sort PT_LOAD segments based on the flags. Readonly segments | |
933 | // come before writable segments. Then executable segments come | |
934 | // before non-executable segments. Then the unlikely case of a | |
935 | // non-readable segment comes before the normal case of a readable | |
936 | // segment. If there are multiple segments with the same type and | |
937 | // flags, we require that the address be set, and we sort by | |
938 | // virtual address and then physical address. | |
939 | if ((flags1 & elfcpp::PF_W) != (flags2 & elfcpp::PF_W)) | |
940 | return (flags1 & elfcpp::PF_W) == 0; | |
941 | if ((flags1 & elfcpp::PF_X) != (flags2 & elfcpp::PF_X)) | |
942 | return (flags1 & elfcpp::PF_X) != 0; | |
943 | if ((flags1 & elfcpp::PF_R) != (flags2 & elfcpp::PF_R)) | |
944 | return (flags1 & elfcpp::PF_R) == 0; | |
945 | ||
946 | uint64_t vaddr1 = seg1->vaddr(); | |
947 | uint64_t vaddr2 = seg2->vaddr(); | |
948 | if (vaddr1 != vaddr2) | |
949 | return vaddr1 < vaddr2; | |
950 | ||
951 | uint64_t paddr1 = seg1->paddr(); | |
952 | uint64_t paddr2 = seg2->paddr(); | |
a3ad94ed | 953 | gold_assert(paddr1 != paddr2); |
75f65a3e ILT |
954 | return paddr1 < paddr2; |
955 | } | |
956 | ||
ead1e424 ILT |
957 | // Set the file offsets of all the segments, and all the sections they |
958 | // contain. They have all been created. LOAD_SEG must be be laid out | |
959 | // first. Return the offset of the data to follow. | |
75f65a3e ILT |
960 | |
961 | off_t | |
ead1e424 ILT |
962 | Layout::set_segment_offsets(const Target* target, Output_segment* load_seg, |
963 | unsigned int *pshndx) | |
75f65a3e ILT |
964 | { |
965 | // Sort them into the final order. | |
54dc6425 ILT |
966 | std::sort(this->segment_list_.begin(), this->segment_list_.end(), |
967 | Layout::Compare_segments()); | |
968 | ||
75f65a3e ILT |
969 | // Find the PT_LOAD segments, and set their addresses and offsets |
970 | // and their section's addresses and offsets. | |
0c5e9c22 ILT |
971 | uint64_t addr; |
972 | if (options_.user_set_text_segment_address()) | |
973 | addr = options_.text_segment_address(); | |
974 | else | |
975 | addr = target->default_text_segment_address(); | |
75f65a3e ILT |
976 | off_t off = 0; |
977 | bool was_readonly = false; | |
978 | for (Segment_list::iterator p = this->segment_list_.begin(); | |
979 | p != this->segment_list_.end(); | |
980 | ++p) | |
981 | { | |
982 | if ((*p)->type() == elfcpp::PT_LOAD) | |
983 | { | |
984 | if (load_seg != NULL && load_seg != *p) | |
a3ad94ed | 985 | gold_unreachable(); |
75f65a3e ILT |
986 | load_seg = NULL; |
987 | ||
988 | // If the last segment was readonly, and this one is not, | |
989 | // then skip the address forward one page, maintaining the | |
990 | // same position within the page. This lets us store both | |
991 | // segments overlapping on a single page in the file, but | |
992 | // the loader will put them on different pages in memory. | |
993 | ||
994 | uint64_t orig_addr = addr; | |
995 | uint64_t orig_off = off; | |
996 | ||
997 | uint64_t aligned_addr = addr; | |
998 | uint64_t abi_pagesize = target->abi_pagesize(); | |
0496d5e5 ILT |
999 | |
1000 | // FIXME: This should depend on the -n and -N options. | |
1001 | (*p)->set_minimum_addralign(target->common_pagesize()); | |
1002 | ||
75f65a3e ILT |
1003 | if (was_readonly && ((*p)->flags() & elfcpp::PF_W) != 0) |
1004 | { | |
ead1e424 | 1005 | uint64_t align = (*p)->addralign(); |
75f65a3e | 1006 | |
ead1e424 | 1007 | addr = align_address(addr, align); |
75f65a3e ILT |
1008 | aligned_addr = addr; |
1009 | if ((addr & (abi_pagesize - 1)) != 0) | |
1010 | addr = addr + abi_pagesize; | |
1011 | } | |
1012 | ||
ead1e424 | 1013 | unsigned int shndx_hold = *pshndx; |
75f65a3e | 1014 | off = orig_off + ((addr - orig_addr) & (abi_pagesize - 1)); |
ead1e424 | 1015 | uint64_t new_addr = (*p)->set_section_addresses(addr, &off, pshndx); |
75f65a3e ILT |
1016 | |
1017 | // Now that we know the size of this segment, we may be able | |
1018 | // to save a page in memory, at the cost of wasting some | |
1019 | // file space, by instead aligning to the start of a new | |
1020 | // page. Here we use the real machine page size rather than | |
1021 | // the ABI mandated page size. | |
1022 | ||
1023 | if (aligned_addr != addr) | |
1024 | { | |
1025 | uint64_t common_pagesize = target->common_pagesize(); | |
1026 | uint64_t first_off = (common_pagesize | |
1027 | - (aligned_addr | |
1028 | & (common_pagesize - 1))); | |
1029 | uint64_t last_off = new_addr & (common_pagesize - 1); | |
1030 | if (first_off > 0 | |
1031 | && last_off > 0 | |
1032 | && ((aligned_addr & ~ (common_pagesize - 1)) | |
1033 | != (new_addr & ~ (common_pagesize - 1))) | |
1034 | && first_off + last_off <= common_pagesize) | |
1035 | { | |
ead1e424 ILT |
1036 | *pshndx = shndx_hold; |
1037 | addr = align_address(aligned_addr, common_pagesize); | |
75f65a3e | 1038 | off = orig_off + ((addr - orig_addr) & (abi_pagesize - 1)); |
ead1e424 | 1039 | new_addr = (*p)->set_section_addresses(addr, &off, pshndx); |
75f65a3e ILT |
1040 | } |
1041 | } | |
1042 | ||
1043 | addr = new_addr; | |
1044 | ||
1045 | if (((*p)->flags() & elfcpp::PF_W) == 0) | |
1046 | was_readonly = true; | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | // Handle the non-PT_LOAD segments, setting their offsets from their | |
1051 | // section's offsets. | |
1052 | for (Segment_list::iterator p = this->segment_list_.begin(); | |
1053 | p != this->segment_list_.end(); | |
1054 | ++p) | |
1055 | { | |
1056 | if ((*p)->type() != elfcpp::PT_LOAD) | |
1057 | (*p)->set_offset(); | |
1058 | } | |
1059 | ||
1060 | return off; | |
1061 | } | |
1062 | ||
1063 | // Set the file offset of all the sections not associated with a | |
1064 | // segment. | |
1065 | ||
1066 | off_t | |
dba5a01f | 1067 | Layout::set_section_offsets(off_t off, |
dba5a01f | 1068 | bool do_bits_sections) |
75f65a3e | 1069 | { |
a3ad94ed ILT |
1070 | for (Section_list::iterator p = this->unattached_section_list_.begin(); |
1071 | p != this->unattached_section_list_.end(); | |
75f65a3e ILT |
1072 | ++p) |
1073 | { | |
dba5a01f ILT |
1074 | bool is_bits_section = ((*p)->type() == elfcpp::SHT_PROGBITS |
1075 | || (*p)->type() == elfcpp::SHT_NOBITS); | |
1076 | if (is_bits_section != do_bits_sections) | |
1077 | continue; | |
61ba1cf9 ILT |
1078 | if ((*p)->offset() != -1) |
1079 | continue; | |
ead1e424 | 1080 | off = align_address(off, (*p)->addralign()); |
75f65a3e ILT |
1081 | (*p)->set_address(0, off); |
1082 | off += (*p)->data_size(); | |
1083 | } | |
1084 | return off; | |
1085 | } | |
1086 | ||
86887060 ILT |
1087 | // Set the section indexes of all the sections not associated with a |
1088 | // segment. | |
1089 | ||
1090 | unsigned int | |
1091 | Layout::set_section_indexes(unsigned int shndx) | |
1092 | { | |
1093 | for (Section_list::iterator p = this->unattached_section_list_.begin(); | |
1094 | p != this->unattached_section_list_.end(); | |
1095 | ++p) | |
1096 | { | |
1097 | (*p)->set_out_shndx(shndx); | |
1098 | ++shndx; | |
1099 | } | |
1100 | return shndx; | |
1101 | } | |
1102 | ||
b8e6aad9 ILT |
1103 | // Create the symbol table sections. Here we also set the final |
1104 | // values of the symbols. At this point all the loadable sections are | |
1105 | // fully laid out. | |
75f65a3e ILT |
1106 | |
1107 | void | |
9025d29d | 1108 | Layout::create_symtab_sections(const Input_objects* input_objects, |
75f65a3e | 1109 | Symbol_table* symtab, |
16649710 | 1110 | off_t* poff) |
75f65a3e | 1111 | { |
61ba1cf9 ILT |
1112 | int symsize; |
1113 | unsigned int align; | |
9025d29d | 1114 | if (parameters->get_size() == 32) |
61ba1cf9 ILT |
1115 | { |
1116 | symsize = elfcpp::Elf_sizes<32>::sym_size; | |
1117 | align = 4; | |
1118 | } | |
9025d29d | 1119 | else if (parameters->get_size() == 64) |
61ba1cf9 ILT |
1120 | { |
1121 | symsize = elfcpp::Elf_sizes<64>::sym_size; | |
1122 | align = 8; | |
1123 | } | |
1124 | else | |
a3ad94ed | 1125 | gold_unreachable(); |
61ba1cf9 ILT |
1126 | |
1127 | off_t off = *poff; | |
ead1e424 | 1128 | off = align_address(off, align); |
61ba1cf9 ILT |
1129 | off_t startoff = off; |
1130 | ||
1131 | // Save space for the dummy symbol at the start of the section. We | |
1132 | // never bother to write this out--it will just be left as zero. | |
1133 | off += symsize; | |
c06b7b0b | 1134 | unsigned int local_symbol_index = 1; |
61ba1cf9 | 1135 | |
a3ad94ed ILT |
1136 | // Add STT_SECTION symbols for each Output section which needs one. |
1137 | for (Section_list::iterator p = this->section_list_.begin(); | |
1138 | p != this->section_list_.end(); | |
1139 | ++p) | |
1140 | { | |
1141 | if (!(*p)->needs_symtab_index()) | |
1142 | (*p)->set_symtab_index(-1U); | |
1143 | else | |
1144 | { | |
1145 | (*p)->set_symtab_index(local_symbol_index); | |
1146 | ++local_symbol_index; | |
1147 | off += symsize; | |
1148 | } | |
1149 | } | |
1150 | ||
f6ce93d6 ILT |
1151 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); |
1152 | p != input_objects->relobj_end(); | |
75f65a3e ILT |
1153 | ++p) |
1154 | { | |
1155 | Task_lock_obj<Object> tlo(**p); | |
c06b7b0b ILT |
1156 | unsigned int index = (*p)->finalize_local_symbols(local_symbol_index, |
1157 | off, | |
1158 | &this->sympool_); | |
1159 | off += (index - local_symbol_index) * symsize; | |
1160 | local_symbol_index = index; | |
75f65a3e ILT |
1161 | } |
1162 | ||
c06b7b0b | 1163 | unsigned int local_symcount = local_symbol_index; |
a3ad94ed | 1164 | gold_assert(local_symcount * symsize == off - startoff); |
61ba1cf9 | 1165 | |
16649710 ILT |
1166 | off_t dynoff; |
1167 | size_t dyn_global_index; | |
1168 | size_t dyncount; | |
1169 | if (this->dynsym_section_ == NULL) | |
1170 | { | |
1171 | dynoff = 0; | |
1172 | dyn_global_index = 0; | |
1173 | dyncount = 0; | |
1174 | } | |
1175 | else | |
1176 | { | |
1177 | dyn_global_index = this->dynsym_section_->info(); | |
1178 | off_t locsize = dyn_global_index * this->dynsym_section_->entsize(); | |
1179 | dynoff = this->dynsym_section_->offset() + locsize; | |
1180 | dyncount = (this->dynsym_section_->data_size() - locsize) / symsize; | |
f5c3f225 | 1181 | gold_assert(static_cast<off_t>(dyncount * symsize) |
16649710 ILT |
1182 | == this->dynsym_section_->data_size() - locsize); |
1183 | } | |
1184 | ||
1185 | off = symtab->finalize(local_symcount, off, dynoff, dyn_global_index, | |
1186 | dyncount, &this->sympool_); | |
75f65a3e | 1187 | |
9e2dcb77 ILT |
1188 | if (!parameters->strip_all()) |
1189 | { | |
1190 | this->sympool_.set_string_offsets(); | |
61ba1cf9 | 1191 | |
cfd73a4e | 1192 | const char* symtab_name = this->namepool_.add(".symtab", false, NULL); |
9e2dcb77 ILT |
1193 | Output_section* osymtab = this->make_output_section(symtab_name, |
1194 | elfcpp::SHT_SYMTAB, | |
1195 | 0); | |
1196 | this->symtab_section_ = osymtab; | |
a3ad94ed | 1197 | |
9e2dcb77 ILT |
1198 | Output_section_data* pos = new Output_data_space(off - startoff, |
1199 | align); | |
1200 | osymtab->add_output_section_data(pos); | |
61ba1cf9 | 1201 | |
cfd73a4e | 1202 | const char* strtab_name = this->namepool_.add(".strtab", false, NULL); |
9e2dcb77 ILT |
1203 | Output_section* ostrtab = this->make_output_section(strtab_name, |
1204 | elfcpp::SHT_STRTAB, | |
1205 | 0); | |
a3ad94ed | 1206 | |
9e2dcb77 ILT |
1207 | Output_section_data* pstr = new Output_data_strtab(&this->sympool_); |
1208 | ostrtab->add_output_section_data(pstr); | |
61ba1cf9 | 1209 | |
9e2dcb77 ILT |
1210 | osymtab->set_address(0, startoff); |
1211 | osymtab->set_link_section(ostrtab); | |
1212 | osymtab->set_info(local_symcount); | |
1213 | osymtab->set_entsize(symsize); | |
61ba1cf9 | 1214 | |
9e2dcb77 ILT |
1215 | *poff = off; |
1216 | } | |
75f65a3e ILT |
1217 | } |
1218 | ||
1219 | // Create the .shstrtab section, which holds the names of the | |
1220 | // sections. At the time this is called, we have created all the | |
1221 | // output sections except .shstrtab itself. | |
1222 | ||
1223 | Output_section* | |
1224 | Layout::create_shstrtab() | |
1225 | { | |
1226 | // FIXME: We don't need to create a .shstrtab section if we are | |
1227 | // stripping everything. | |
1228 | ||
cfd73a4e | 1229 | const char* name = this->namepool_.add(".shstrtab", false, NULL); |
75f65a3e | 1230 | |
61ba1cf9 ILT |
1231 | this->namepool_.set_string_offsets(); |
1232 | ||
a3ad94ed | 1233 | Output_section* os = this->make_output_section(name, elfcpp::SHT_STRTAB, 0); |
75f65a3e | 1234 | |
a3ad94ed ILT |
1235 | Output_section_data* posd = new Output_data_strtab(&this->namepool_); |
1236 | os->add_output_section_data(posd); | |
75f65a3e ILT |
1237 | |
1238 | return os; | |
1239 | } | |
1240 | ||
1241 | // Create the section headers. SIZE is 32 or 64. OFF is the file | |
1242 | // offset. | |
1243 | ||
1244 | Output_section_headers* | |
9025d29d | 1245 | Layout::create_shdrs(off_t* poff) |
75f65a3e ILT |
1246 | { |
1247 | Output_section_headers* oshdrs; | |
9025d29d | 1248 | oshdrs = new Output_section_headers(this, |
16649710 ILT |
1249 | &this->segment_list_, |
1250 | &this->unattached_section_list_, | |
61ba1cf9 | 1251 | &this->namepool_); |
ead1e424 | 1252 | off_t off = align_address(*poff, oshdrs->addralign()); |
75f65a3e | 1253 | oshdrs->set_address(0, off); |
61ba1cf9 ILT |
1254 | off += oshdrs->data_size(); |
1255 | *poff = off; | |
1256 | this->special_output_list_.push_back(oshdrs); | |
75f65a3e | 1257 | return oshdrs; |
54dc6425 ILT |
1258 | } |
1259 | ||
dbe717ef ILT |
1260 | // Create the dynamic symbol table. |
1261 | ||
1262 | void | |
14b31740 ILT |
1263 | Layout::create_dynamic_symtab(const Target* target, Symbol_table* symtab, |
1264 | Output_section **pdynstr, | |
1265 | unsigned int* plocal_dynamic_count, | |
1266 | std::vector<Symbol*>* pdynamic_symbols, | |
1267 | Versions* pversions) | |
dbe717ef | 1268 | { |
a3ad94ed ILT |
1269 | // Count all the symbols in the dynamic symbol table, and set the |
1270 | // dynamic symbol indexes. | |
dbe717ef | 1271 | |
a3ad94ed ILT |
1272 | // Skip symbol 0, which is always all zeroes. |
1273 | unsigned int index = 1; | |
dbe717ef | 1274 | |
a3ad94ed ILT |
1275 | // Add STT_SECTION symbols for each Output section which needs one. |
1276 | for (Section_list::iterator p = this->section_list_.begin(); | |
1277 | p != this->section_list_.end(); | |
1278 | ++p) | |
1279 | { | |
1280 | if (!(*p)->needs_dynsym_index()) | |
1281 | (*p)->set_dynsym_index(-1U); | |
1282 | else | |
1283 | { | |
1284 | (*p)->set_dynsym_index(index); | |
1285 | ++index; | |
1286 | } | |
1287 | } | |
1288 | ||
1289 | // FIXME: Some targets apparently require local symbols in the | |
1290 | // dynamic symbol table. Here is where we will have to count them, | |
1291 | // and set the dynamic symbol indexes, and add the names to | |
1292 | // this->dynpool_. | |
1293 | ||
1294 | unsigned int local_symcount = index; | |
14b31740 | 1295 | *plocal_dynamic_count = local_symcount; |
a3ad94ed ILT |
1296 | |
1297 | // FIXME: We have to tell set_dynsym_indexes whether the | |
1298 | // -E/--export-dynamic option was used. | |
35cdfc9a ILT |
1299 | index = symtab->set_dynsym_indexes(target, index, pdynamic_symbols, |
1300 | &this->dynpool_, pversions); | |
a3ad94ed ILT |
1301 | |
1302 | int symsize; | |
1303 | unsigned int align; | |
9025d29d | 1304 | const int size = parameters->get_size(); |
a3ad94ed ILT |
1305 | if (size == 32) |
1306 | { | |
1307 | symsize = elfcpp::Elf_sizes<32>::sym_size; | |
1308 | align = 4; | |
1309 | } | |
1310 | else if (size == 64) | |
1311 | { | |
1312 | symsize = elfcpp::Elf_sizes<64>::sym_size; | |
1313 | align = 8; | |
1314 | } | |
1315 | else | |
1316 | gold_unreachable(); | |
1317 | ||
14b31740 ILT |
1318 | // Create the dynamic symbol table section. |
1319 | ||
cfd73a4e | 1320 | const char* dynsym_name = this->namepool_.add(".dynsym", false, NULL); |
a3ad94ed ILT |
1321 | Output_section* dynsym = this->make_output_section(dynsym_name, |
1322 | elfcpp::SHT_DYNSYM, | |
1323 | elfcpp::SHF_ALLOC); | |
1324 | ||
1325 | Output_section_data* odata = new Output_data_space(index * symsize, | |
1326 | align); | |
1327 | dynsym->add_output_section_data(odata); | |
1328 | ||
1329 | dynsym->set_info(local_symcount); | |
1330 | dynsym->set_entsize(symsize); | |
1331 | dynsym->set_addralign(align); | |
1332 | ||
1333 | this->dynsym_section_ = dynsym; | |
1334 | ||
16649710 | 1335 | Output_data_dynamic* const odyn = this->dynamic_data_; |
a3ad94ed ILT |
1336 | odyn->add_section_address(elfcpp::DT_SYMTAB, dynsym); |
1337 | odyn->add_constant(elfcpp::DT_SYMENT, symsize); | |
1338 | ||
14b31740 ILT |
1339 | // Create the dynamic string table section. |
1340 | ||
cfd73a4e | 1341 | const char* dynstr_name = this->namepool_.add(".dynstr", false, NULL); |
a3ad94ed ILT |
1342 | Output_section* dynstr = this->make_output_section(dynstr_name, |
1343 | elfcpp::SHT_STRTAB, | |
1344 | elfcpp::SHF_ALLOC); | |
1345 | ||
1346 | Output_section_data* strdata = new Output_data_strtab(&this->dynpool_); | |
1347 | dynstr->add_output_section_data(strdata); | |
1348 | ||
16649710 ILT |
1349 | dynsym->set_link_section(dynstr); |
1350 | this->dynamic_section_->set_link_section(dynstr); | |
1351 | ||
a3ad94ed ILT |
1352 | odyn->add_section_address(elfcpp::DT_STRTAB, dynstr); |
1353 | odyn->add_section_size(elfcpp::DT_STRSZ, dynstr); | |
1354 | ||
14b31740 ILT |
1355 | *pdynstr = dynstr; |
1356 | ||
1357 | // Create the hash tables. | |
1358 | ||
a3ad94ed ILT |
1359 | // FIXME: We need an option to create a GNU hash table. |
1360 | ||
1361 | unsigned char* phash; | |
1362 | unsigned int hashlen; | |
9025d29d | 1363 | Dynobj::create_elf_hash_table(*pdynamic_symbols, local_symcount, |
a3ad94ed ILT |
1364 | &phash, &hashlen); |
1365 | ||
cfd73a4e | 1366 | const char* hash_name = this->namepool_.add(".hash", false, NULL); |
a3ad94ed ILT |
1367 | Output_section* hashsec = this->make_output_section(hash_name, |
1368 | elfcpp::SHT_HASH, | |
1369 | elfcpp::SHF_ALLOC); | |
1370 | ||
1371 | Output_section_data* hashdata = new Output_data_const_buffer(phash, | |
1372 | hashlen, | |
1373 | align); | |
1374 | hashsec->add_output_section_data(hashdata); | |
1375 | ||
16649710 | 1376 | hashsec->set_link_section(dynsym); |
a3ad94ed | 1377 | hashsec->set_entsize(4); |
a3ad94ed ILT |
1378 | |
1379 | odyn->add_section_address(elfcpp::DT_HASH, hashsec); | |
dbe717ef ILT |
1380 | } |
1381 | ||
14b31740 ILT |
1382 | // Create the version sections. |
1383 | ||
1384 | void | |
9025d29d | 1385 | Layout::create_version_sections(const Versions* versions, |
46fe1623 | 1386 | const Symbol_table* symtab, |
14b31740 ILT |
1387 | unsigned int local_symcount, |
1388 | const std::vector<Symbol*>& dynamic_symbols, | |
1389 | const Output_section* dynstr) | |
1390 | { | |
1391 | if (!versions->any_defs() && !versions->any_needs()) | |
1392 | return; | |
1393 | ||
9025d29d | 1394 | if (parameters->get_size() == 32) |
14b31740 | 1395 | { |
9025d29d | 1396 | if (parameters->is_big_endian()) |
193a53d9 ILT |
1397 | { |
1398 | #ifdef HAVE_TARGET_32_BIG | |
1399 | this->sized_create_version_sections | |
1400 | SELECT_SIZE_ENDIAN_NAME(32, true)( | |
46fe1623 | 1401 | versions, symtab, local_symcount, dynamic_symbols, dynstr |
193a53d9 ILT |
1402 | SELECT_SIZE_ENDIAN(32, true)); |
1403 | #else | |
1404 | gold_unreachable(); | |
1405 | #endif | |
1406 | } | |
14b31740 | 1407 | else |
193a53d9 ILT |
1408 | { |
1409 | #ifdef HAVE_TARGET_32_LITTLE | |
1410 | this->sized_create_version_sections | |
1411 | SELECT_SIZE_ENDIAN_NAME(32, false)( | |
46fe1623 | 1412 | versions, symtab, local_symcount, dynamic_symbols, dynstr |
193a53d9 ILT |
1413 | SELECT_SIZE_ENDIAN(32, false)); |
1414 | #else | |
1415 | gold_unreachable(); | |
1416 | #endif | |
1417 | } | |
14b31740 | 1418 | } |
9025d29d | 1419 | else if (parameters->get_size() == 64) |
14b31740 | 1420 | { |
9025d29d | 1421 | if (parameters->is_big_endian()) |
193a53d9 ILT |
1422 | { |
1423 | #ifdef HAVE_TARGET_64_BIG | |
1424 | this->sized_create_version_sections | |
1425 | SELECT_SIZE_ENDIAN_NAME(64, true)( | |
46fe1623 | 1426 | versions, symtab, local_symcount, dynamic_symbols, dynstr |
193a53d9 ILT |
1427 | SELECT_SIZE_ENDIAN(64, true)); |
1428 | #else | |
1429 | gold_unreachable(); | |
1430 | #endif | |
1431 | } | |
14b31740 | 1432 | else |
193a53d9 ILT |
1433 | { |
1434 | #ifdef HAVE_TARGET_64_LITTLE | |
1435 | this->sized_create_version_sections | |
1436 | SELECT_SIZE_ENDIAN_NAME(64, false)( | |
46fe1623 | 1437 | versions, symtab, local_symcount, dynamic_symbols, dynstr |
193a53d9 ILT |
1438 | SELECT_SIZE_ENDIAN(64, false)); |
1439 | #else | |
1440 | gold_unreachable(); | |
1441 | #endif | |
1442 | } | |
14b31740 ILT |
1443 | } |
1444 | else | |
1445 | gold_unreachable(); | |
1446 | } | |
1447 | ||
1448 | // Create the version sections, sized version. | |
1449 | ||
1450 | template<int size, bool big_endian> | |
1451 | void | |
1452 | Layout::sized_create_version_sections( | |
1453 | const Versions* versions, | |
46fe1623 | 1454 | const Symbol_table* symtab, |
14b31740 ILT |
1455 | unsigned int local_symcount, |
1456 | const std::vector<Symbol*>& dynamic_symbols, | |
91da9340 ILT |
1457 | const Output_section* dynstr |
1458 | ACCEPT_SIZE_ENDIAN) | |
14b31740 | 1459 | { |
cfd73a4e | 1460 | const char* vname = this->namepool_.add(".gnu.version", false, NULL); |
14b31740 ILT |
1461 | Output_section* vsec = this->make_output_section(vname, |
1462 | elfcpp::SHT_GNU_versym, | |
1463 | elfcpp::SHF_ALLOC); | |
1464 | ||
1465 | unsigned char* vbuf; | |
1466 | unsigned int vsize; | |
91da9340 | 1467 | versions->symbol_section_contents SELECT_SIZE_ENDIAN_NAME(size, big_endian)( |
46fe1623 | 1468 | symtab, &this->dynpool_, local_symcount, dynamic_symbols, &vbuf, &vsize |
7e1edb90 | 1469 | SELECT_SIZE_ENDIAN(size, big_endian)); |
14b31740 ILT |
1470 | |
1471 | Output_section_data* vdata = new Output_data_const_buffer(vbuf, vsize, 2); | |
1472 | ||
1473 | vsec->add_output_section_data(vdata); | |
1474 | vsec->set_entsize(2); | |
1475 | vsec->set_link_section(this->dynsym_section_); | |
1476 | ||
1477 | Output_data_dynamic* const odyn = this->dynamic_data_; | |
1478 | odyn->add_section_address(elfcpp::DT_VERSYM, vsec); | |
1479 | ||
1480 | if (versions->any_defs()) | |
1481 | { | |
cfd73a4e | 1482 | const char* vdname = this->namepool_.add(".gnu.version_d", false, NULL); |
14b31740 ILT |
1483 | Output_section *vdsec; |
1484 | vdsec = this->make_output_section(vdname, elfcpp::SHT_GNU_verdef, | |
1485 | elfcpp::SHF_ALLOC); | |
1486 | ||
1487 | unsigned char* vdbuf; | |
1488 | unsigned int vdsize; | |
1489 | unsigned int vdentries; | |
91da9340 ILT |
1490 | versions->def_section_contents SELECT_SIZE_ENDIAN_NAME(size, big_endian)( |
1491 | &this->dynpool_, &vdbuf, &vdsize, &vdentries | |
1492 | SELECT_SIZE_ENDIAN(size, big_endian)); | |
14b31740 ILT |
1493 | |
1494 | Output_section_data* vddata = new Output_data_const_buffer(vdbuf, | |
1495 | vdsize, | |
1496 | 4); | |
1497 | ||
1498 | vdsec->add_output_section_data(vddata); | |
1499 | vdsec->set_link_section(dynstr); | |
1500 | vdsec->set_info(vdentries); | |
1501 | ||
1502 | odyn->add_section_address(elfcpp::DT_VERDEF, vdsec); | |
1503 | odyn->add_constant(elfcpp::DT_VERDEFNUM, vdentries); | |
1504 | } | |
1505 | ||
1506 | if (versions->any_needs()) | |
1507 | { | |
cfd73a4e | 1508 | const char* vnname = this->namepool_.add(".gnu.version_r", false, NULL); |
14b31740 ILT |
1509 | Output_section* vnsec; |
1510 | vnsec = this->make_output_section(vnname, elfcpp::SHT_GNU_verneed, | |
1511 | elfcpp::SHF_ALLOC); | |
1512 | ||
1513 | unsigned char* vnbuf; | |
1514 | unsigned int vnsize; | |
1515 | unsigned int vnentries; | |
91da9340 ILT |
1516 | versions->need_section_contents SELECT_SIZE_ENDIAN_NAME(size, big_endian) |
1517 | (&this->dynpool_, &vnbuf, &vnsize, &vnentries | |
1518 | SELECT_SIZE_ENDIAN(size, big_endian)); | |
14b31740 ILT |
1519 | |
1520 | Output_section_data* vndata = new Output_data_const_buffer(vnbuf, | |
1521 | vnsize, | |
1522 | 4); | |
1523 | ||
1524 | vnsec->add_output_section_data(vndata); | |
1525 | vnsec->set_link_section(dynstr); | |
1526 | vnsec->set_info(vnentries); | |
1527 | ||
1528 | odyn->add_section_address(elfcpp::DT_VERNEED, vnsec); | |
1529 | odyn->add_constant(elfcpp::DT_VERNEEDNUM, vnentries); | |
1530 | } | |
1531 | } | |
1532 | ||
dbe717ef ILT |
1533 | // Create the .interp section and PT_INTERP segment. |
1534 | ||
1535 | void | |
1536 | Layout::create_interp(const Target* target) | |
1537 | { | |
1538 | const char* interp = this->options_.dynamic_linker(); | |
1539 | if (interp == NULL) | |
1540 | { | |
1541 | interp = target->dynamic_linker(); | |
a3ad94ed | 1542 | gold_assert(interp != NULL); |
dbe717ef ILT |
1543 | } |
1544 | ||
1545 | size_t len = strlen(interp) + 1; | |
1546 | ||
1547 | Output_section_data* odata = new Output_data_const(interp, len, 1); | |
1548 | ||
cfd73a4e | 1549 | const char* interp_name = this->namepool_.add(".interp", false, NULL); |
dbe717ef ILT |
1550 | Output_section* osec = this->make_output_section(interp_name, |
1551 | elfcpp::SHT_PROGBITS, | |
1552 | elfcpp::SHF_ALLOC); | |
1553 | osec->add_output_section_data(odata); | |
1554 | ||
1555 | Output_segment* oseg = new Output_segment(elfcpp::PT_INTERP, elfcpp::PF_R); | |
1556 | this->segment_list_.push_back(oseg); | |
1557 | oseg->add_initial_output_section(osec, elfcpp::PF_R); | |
1558 | } | |
1559 | ||
a3ad94ed ILT |
1560 | // Finish the .dynamic section and PT_DYNAMIC segment. |
1561 | ||
1562 | void | |
1563 | Layout::finish_dynamic_section(const Input_objects* input_objects, | |
16649710 | 1564 | const Symbol_table* symtab) |
a3ad94ed | 1565 | { |
a3ad94ed ILT |
1566 | Output_segment* oseg = new Output_segment(elfcpp::PT_DYNAMIC, |
1567 | elfcpp::PF_R | elfcpp::PF_W); | |
1568 | this->segment_list_.push_back(oseg); | |
1569 | oseg->add_initial_output_section(this->dynamic_section_, | |
1570 | elfcpp::PF_R | elfcpp::PF_W); | |
1571 | ||
16649710 ILT |
1572 | Output_data_dynamic* const odyn = this->dynamic_data_; |
1573 | ||
a3ad94ed ILT |
1574 | for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin(); |
1575 | p != input_objects->dynobj_end(); | |
1576 | ++p) | |
1577 | { | |
1578 | // FIXME: Handle --as-needed. | |
1579 | odyn->add_string(elfcpp::DT_NEEDED, (*p)->soname()); | |
1580 | } | |
1581 | ||
1582 | // FIXME: Support --init and --fini. | |
1583 | Symbol* sym = symtab->lookup("_init"); | |
14b31740 | 1584 | if (sym != NULL && sym->is_defined() && !sym->is_from_dynobj()) |
a3ad94ed ILT |
1585 | odyn->add_symbol(elfcpp::DT_INIT, sym); |
1586 | ||
1587 | sym = symtab->lookup("_fini"); | |
14b31740 | 1588 | if (sym != NULL && sym->is_defined() && !sym->is_from_dynobj()) |
a3ad94ed ILT |
1589 | odyn->add_symbol(elfcpp::DT_FINI, sym); |
1590 | ||
1591 | // FIXME: Support DT_INIT_ARRAY and DT_FINI_ARRAY. | |
41f542e7 ILT |
1592 | |
1593 | // Add a DT_RPATH entry if needed. | |
1594 | const General_options::Dir_list& rpath(this->options_.rpath()); | |
1595 | if (!rpath.empty()) | |
1596 | { | |
1597 | std::string rpath_val; | |
1598 | for (General_options::Dir_list::const_iterator p = rpath.begin(); | |
1599 | p != rpath.end(); | |
1600 | ++p) | |
1601 | { | |
1602 | if (rpath_val.empty()) | |
ad2d6943 | 1603 | rpath_val = p->name(); |
41f542e7 ILT |
1604 | else |
1605 | { | |
1606 | // Eliminate duplicates. | |
1607 | General_options::Dir_list::const_iterator q; | |
1608 | for (q = rpath.begin(); q != p; ++q) | |
ad2d6943 | 1609 | if (q->name() == p->name()) |
41f542e7 ILT |
1610 | break; |
1611 | if (q == p) | |
1612 | { | |
1613 | rpath_val += ':'; | |
ad2d6943 | 1614 | rpath_val += p->name(); |
41f542e7 ILT |
1615 | } |
1616 | } | |
1617 | } | |
1618 | ||
1619 | odyn->add_string(elfcpp::DT_RPATH, rpath_val); | |
1620 | } | |
07f397ab ILT |
1621 | |
1622 | // Add a DT_FLAGS entry. We add it even if no flags are set so that | |
1623 | // post-link tools can easily modify these flags if desired. | |
1624 | unsigned int flags = 0; | |
1625 | if (this->have_textrel_) | |
1626 | flags |= elfcpp::DF_TEXTREL; | |
1627 | odyn->add_constant(elfcpp::DT_FLAGS, flags); | |
a3ad94ed ILT |
1628 | } |
1629 | ||
a2fb1b05 ILT |
1630 | // The mapping of .gnu.linkonce section names to real section names. |
1631 | ||
ead1e424 | 1632 | #define MAPPING_INIT(f, t) { f, sizeof(f) - 1, t, sizeof(t) - 1 } |
a2fb1b05 ILT |
1633 | const Layout::Linkonce_mapping Layout::linkonce_mapping[] = |
1634 | { | |
1635 | MAPPING_INIT("d.rel.ro", ".data.rel.ro"), // Must be before "d". | |
1636 | MAPPING_INIT("t", ".text"), | |
1637 | MAPPING_INIT("r", ".rodata"), | |
1638 | MAPPING_INIT("d", ".data"), | |
1639 | MAPPING_INIT("b", ".bss"), | |
1640 | MAPPING_INIT("s", ".sdata"), | |
1641 | MAPPING_INIT("sb", ".sbss"), | |
1642 | MAPPING_INIT("s2", ".sdata2"), | |
1643 | MAPPING_INIT("sb2", ".sbss2"), | |
1644 | MAPPING_INIT("wi", ".debug_info"), | |
1645 | MAPPING_INIT("td", ".tdata"), | |
1646 | MAPPING_INIT("tb", ".tbss"), | |
1647 | MAPPING_INIT("lr", ".lrodata"), | |
1648 | MAPPING_INIT("l", ".ldata"), | |
1649 | MAPPING_INIT("lb", ".lbss"), | |
1650 | }; | |
1651 | #undef MAPPING_INIT | |
1652 | ||
1653 | const int Layout::linkonce_mapping_count = | |
1654 | sizeof(Layout::linkonce_mapping) / sizeof(Layout::linkonce_mapping[0]); | |
1655 | ||
1656 | // Return the name of the output section to use for a .gnu.linkonce | |
1657 | // section. This is based on the default ELF linker script of the old | |
1658 | // GNU linker. For example, we map a name like ".gnu.linkonce.t.foo" | |
ead1e424 ILT |
1659 | // to ".text". Set *PLEN to the length of the name. *PLEN is |
1660 | // initialized to the length of NAME. | |
a2fb1b05 ILT |
1661 | |
1662 | const char* | |
ead1e424 | 1663 | Layout::linkonce_output_name(const char* name, size_t *plen) |
a2fb1b05 ILT |
1664 | { |
1665 | const char* s = name + sizeof(".gnu.linkonce") - 1; | |
1666 | if (*s != '.') | |
1667 | return name; | |
1668 | ++s; | |
1669 | const Linkonce_mapping* plm = linkonce_mapping; | |
1670 | for (int i = 0; i < linkonce_mapping_count; ++i, ++plm) | |
1671 | { | |
1672 | if (strncmp(s, plm->from, plm->fromlen) == 0 && s[plm->fromlen] == '.') | |
ead1e424 ILT |
1673 | { |
1674 | *plen = plm->tolen; | |
1675 | return plm->to; | |
1676 | } | |
a2fb1b05 ILT |
1677 | } |
1678 | return name; | |
1679 | } | |
1680 | ||
ead1e424 ILT |
1681 | // Choose the output section name to use given an input section name. |
1682 | // Set *PLEN to the length of the name. *PLEN is initialized to the | |
1683 | // length of NAME. | |
1684 | ||
1685 | const char* | |
1686 | Layout::output_section_name(const char* name, size_t* plen) | |
1687 | { | |
1688 | if (Layout::is_linkonce(name)) | |
1689 | { | |
1690 | // .gnu.linkonce sections are laid out as though they were named | |
1691 | // for the sections are placed into. | |
1692 | return Layout::linkonce_output_name(name, plen); | |
1693 | } | |
1694 | ||
af4a8a83 ILT |
1695 | // gcc 4.3 generates the following sorts of section names when it |
1696 | // needs a section name specific to a function: | |
1697 | // .text.FN | |
1698 | // .rodata.FN | |
1699 | // .sdata2.FN | |
1700 | // .data.FN | |
1701 | // .data.rel.FN | |
1702 | // .data.rel.local.FN | |
1703 | // .data.rel.ro.FN | |
1704 | // .data.rel.ro.local.FN | |
1705 | // .sdata.FN | |
1706 | // .bss.FN | |
1707 | // .sbss.FN | |
1708 | // .tdata.FN | |
1709 | // .tbss.FN | |
1710 | ||
1711 | // The GNU linker maps all of those to the part before the .FN, | |
1712 | // except that .data.rel.local.FN is mapped to .data, and | |
1713 | // .data.rel.ro.local.FN is mapped to .data.rel.ro. The sections | |
1714 | // beginning with .data.rel.ro.local are grouped together. | |
1715 | ||
1716 | // For an anonymous namespace, the string FN can contain a '.'. | |
1717 | ||
1718 | // Also of interest: .rodata.strN.N, .rodata.cstN, both of which the | |
1719 | // GNU linker maps to .rodata. | |
1720 | ||
1721 | // The .data.rel.ro sections enable a security feature triggered by | |
1722 | // the -z relro option. Section which need to be relocated at | |
1723 | // program startup time but which may be readonly after startup are | |
1724 | // grouped into .data.rel.ro. They are then put into a PT_GNU_RELRO | |
1725 | // segment. The dynamic linker will make that segment writable, | |
1726 | // perform relocations, and then make it read-only. FIXME: We do | |
1727 | // not yet implement this optimization. | |
1728 | ||
1729 | // It is hard to handle this in a principled way. | |
1730 | ||
1731 | // These are the rules we follow: | |
1732 | ||
1733 | // If the section name has no initial '.', or no dot other than an | |
1734 | // initial '.', we use the name unchanged (i.e., "mysection" and | |
1735 | // ".text" are unchanged). | |
1736 | ||
1737 | // If the name starts with ".data.rel.ro" we use ".data.rel.ro". | |
1738 | ||
1739 | // Otherwise, we drop the second '.' and everything that comes after | |
1740 | // it (i.e., ".text.XXX" becomes ".text"). | |
ead1e424 ILT |
1741 | |
1742 | const char* s = name; | |
af4a8a83 ILT |
1743 | if (*s != '.') |
1744 | return name; | |
1745 | ++s; | |
ead1e424 ILT |
1746 | const char* sdot = strchr(s, '.'); |
1747 | if (sdot == NULL) | |
1748 | return name; | |
1749 | ||
af4a8a83 ILT |
1750 | const char* const data_rel_ro = ".data.rel.ro"; |
1751 | if (strncmp(name, data_rel_ro, strlen(data_rel_ro)) == 0) | |
ead1e424 | 1752 | { |
af4a8a83 ILT |
1753 | *plen = strlen(data_rel_ro); |
1754 | return data_rel_ro; | |
ead1e424 ILT |
1755 | } |
1756 | ||
ead1e424 ILT |
1757 | *plen = sdot - name; |
1758 | return name; | |
1759 | } | |
1760 | ||
a2fb1b05 ILT |
1761 | // Record the signature of a comdat section, and return whether to |
1762 | // include it in the link. If GROUP is true, this is a regular | |
1763 | // section group. If GROUP is false, this is a group signature | |
1764 | // derived from the name of a linkonce section. We want linkonce | |
1765 | // signatures and group signatures to block each other, but we don't | |
1766 | // want a linkonce signature to block another linkonce signature. | |
1767 | ||
1768 | bool | |
1769 | Layout::add_comdat(const char* signature, bool group) | |
1770 | { | |
1771 | std::string sig(signature); | |
1772 | std::pair<Signatures::iterator, bool> ins( | |
ead1e424 | 1773 | this->signatures_.insert(std::make_pair(sig, group))); |
a2fb1b05 ILT |
1774 | |
1775 | if (ins.second) | |
1776 | { | |
1777 | // This is the first time we've seen this signature. | |
1778 | return true; | |
1779 | } | |
1780 | ||
1781 | if (ins.first->second) | |
1782 | { | |
1783 | // We've already seen a real section group with this signature. | |
1784 | return false; | |
1785 | } | |
1786 | else if (group) | |
1787 | { | |
1788 | // This is a real section group, and we've already seen a | |
a0fa0c07 | 1789 | // linkonce section with this signature. Record that we've seen |
a2fb1b05 ILT |
1790 | // a section group, and don't include this section group. |
1791 | ins.first->second = true; | |
1792 | return false; | |
1793 | } | |
1794 | else | |
1795 | { | |
1796 | // We've already seen a linkonce section and this is a linkonce | |
1797 | // section. These don't block each other--this may be the same | |
1798 | // symbol name with different section types. | |
1799 | return true; | |
1800 | } | |
1801 | } | |
1802 | ||
730cdc88 ILT |
1803 | // Write out the Output_sections. Most won't have anything to write, |
1804 | // since most of the data will come from input sections which are | |
1805 | // handled elsewhere. But some Output_sections do have Output_data. | |
1806 | ||
1807 | void | |
1808 | Layout::write_output_sections(Output_file* of) const | |
1809 | { | |
1810 | for (Section_list::const_iterator p = this->section_list_.begin(); | |
1811 | p != this->section_list_.end(); | |
1812 | ++p) | |
1813 | { | |
1814 | if (!(*p)->after_input_sections()) | |
1815 | (*p)->write(of); | |
1816 | } | |
1817 | } | |
1818 | ||
61ba1cf9 ILT |
1819 | // Write out data not associated with a section or the symbol table. |
1820 | ||
1821 | void | |
9025d29d | 1822 | Layout::write_data(const Symbol_table* symtab, Output_file* of) const |
61ba1cf9 | 1823 | { |
9e2dcb77 | 1824 | if (!parameters->strip_all()) |
a3ad94ed | 1825 | { |
9e2dcb77 ILT |
1826 | const Output_section* symtab_section = this->symtab_section_; |
1827 | for (Section_list::const_iterator p = this->section_list_.begin(); | |
1828 | p != this->section_list_.end(); | |
1829 | ++p) | |
a3ad94ed | 1830 | { |
9e2dcb77 ILT |
1831 | if ((*p)->needs_symtab_index()) |
1832 | { | |
1833 | gold_assert(symtab_section != NULL); | |
1834 | unsigned int index = (*p)->symtab_index(); | |
1835 | gold_assert(index > 0 && index != -1U); | |
1836 | off_t off = (symtab_section->offset() | |
1837 | + index * symtab_section->entsize()); | |
1838 | symtab->write_section_symbol(*p, of, off); | |
1839 | } | |
a3ad94ed ILT |
1840 | } |
1841 | } | |
1842 | ||
1843 | const Output_section* dynsym_section = this->dynsym_section_; | |
1844 | for (Section_list::const_iterator p = this->section_list_.begin(); | |
1845 | p != this->section_list_.end(); | |
1846 | ++p) | |
1847 | { | |
1848 | if ((*p)->needs_dynsym_index()) | |
1849 | { | |
1850 | gold_assert(dynsym_section != NULL); | |
1851 | unsigned int index = (*p)->dynsym_index(); | |
1852 | gold_assert(index > 0 && index != -1U); | |
1853 | off_t off = (dynsym_section->offset() | |
1854 | + index * dynsym_section->entsize()); | |
9025d29d | 1855 | symtab->write_section_symbol(*p, of, off); |
a3ad94ed ILT |
1856 | } |
1857 | } | |
1858 | ||
a3ad94ed | 1859 | // Write out the Output_data which are not in an Output_section. |
61ba1cf9 ILT |
1860 | for (Data_list::const_iterator p = this->special_output_list_.begin(); |
1861 | p != this->special_output_list_.end(); | |
1862 | ++p) | |
1863 | (*p)->write(of); | |
1864 | } | |
1865 | ||
730cdc88 ILT |
1866 | // Write out the Output_sections which can only be written after the |
1867 | // input sections are complete. | |
1868 | ||
1869 | void | |
1870 | Layout::write_sections_after_input_sections(Output_file* of) const | |
1871 | { | |
1872 | for (Section_list::const_iterator p = this->section_list_.begin(); | |
1873 | p != this->section_list_.end(); | |
1874 | ++p) | |
1875 | { | |
1876 | if ((*p)->after_input_sections()) | |
1877 | (*p)->write(of); | |
1878 | } | |
1879 | } | |
1880 | ||
1881 | // Write_sections_task methods. | |
1882 | ||
1883 | // We can always run this task. | |
1884 | ||
1885 | Task::Is_runnable_type | |
1886 | Write_sections_task::is_runnable(Workqueue*) | |
1887 | { | |
1888 | return IS_RUNNABLE; | |
1889 | } | |
1890 | ||
1891 | // We need to unlock both OUTPUT_SECTIONS_BLOCKER and FINAL_BLOCKER | |
1892 | // when finished. | |
1893 | ||
1894 | class Write_sections_task::Write_sections_locker : public Task_locker | |
1895 | { | |
1896 | public: | |
1897 | Write_sections_locker(Task_token& output_sections_blocker, | |
1898 | Task_token& final_blocker, | |
1899 | Workqueue* workqueue) | |
1900 | : output_sections_block_(output_sections_blocker, workqueue), | |
1901 | final_block_(final_blocker, workqueue) | |
1902 | { } | |
1903 | ||
1904 | private: | |
1905 | Task_block_token output_sections_block_; | |
1906 | Task_block_token final_block_; | |
1907 | }; | |
1908 | ||
1909 | Task_locker* | |
1910 | Write_sections_task::locks(Workqueue* workqueue) | |
1911 | { | |
1912 | return new Write_sections_locker(*this->output_sections_blocker_, | |
1913 | *this->final_blocker_, | |
1914 | workqueue); | |
1915 | } | |
1916 | ||
1917 | // Run the task--write out the data. | |
1918 | ||
1919 | void | |
1920 | Write_sections_task::run(Workqueue*) | |
1921 | { | |
1922 | this->layout_->write_output_sections(this->of_); | |
1923 | } | |
1924 | ||
61ba1cf9 ILT |
1925 | // Write_data_task methods. |
1926 | ||
1927 | // We can always run this task. | |
1928 | ||
1929 | Task::Is_runnable_type | |
1930 | Write_data_task::is_runnable(Workqueue*) | |
1931 | { | |
1932 | return IS_RUNNABLE; | |
1933 | } | |
1934 | ||
1935 | // We need to unlock FINAL_BLOCKER when finished. | |
1936 | ||
1937 | Task_locker* | |
1938 | Write_data_task::locks(Workqueue* workqueue) | |
1939 | { | |
1940 | return new Task_locker_block(*this->final_blocker_, workqueue); | |
1941 | } | |
1942 | ||
1943 | // Run the task--write out the data. | |
1944 | ||
1945 | void | |
1946 | Write_data_task::run(Workqueue*) | |
1947 | { | |
9025d29d | 1948 | this->layout_->write_data(this->symtab_, this->of_); |
61ba1cf9 ILT |
1949 | } |
1950 | ||
1951 | // Write_symbols_task methods. | |
1952 | ||
1953 | // We can always run this task. | |
1954 | ||
1955 | Task::Is_runnable_type | |
1956 | Write_symbols_task::is_runnable(Workqueue*) | |
1957 | { | |
1958 | return IS_RUNNABLE; | |
1959 | } | |
1960 | ||
1961 | // We need to unlock FINAL_BLOCKER when finished. | |
1962 | ||
1963 | Task_locker* | |
1964 | Write_symbols_task::locks(Workqueue* workqueue) | |
1965 | { | |
1966 | return new Task_locker_block(*this->final_blocker_, workqueue); | |
1967 | } | |
1968 | ||
1969 | // Run the task--write out the symbols. | |
1970 | ||
1971 | void | |
1972 | Write_symbols_task::run(Workqueue*) | |
1973 | { | |
9a2d6984 ILT |
1974 | this->symtab_->write_globals(this->input_objects_, this->sympool_, |
1975 | this->dynpool_, this->of_); | |
61ba1cf9 ILT |
1976 | } |
1977 | ||
730cdc88 ILT |
1978 | // Write_after_input_sections_task methods. |
1979 | ||
1980 | // We can only run this task after the input sections have completed. | |
1981 | ||
1982 | Task::Is_runnable_type | |
1983 | Write_after_input_sections_task::is_runnable(Workqueue*) | |
1984 | { | |
1985 | if (this->input_sections_blocker_->is_blocked()) | |
1986 | return IS_BLOCKED; | |
1987 | return IS_RUNNABLE; | |
1988 | } | |
1989 | ||
1990 | // We need to unlock FINAL_BLOCKER when finished. | |
1991 | ||
1992 | Task_locker* | |
1993 | Write_after_input_sections_task::locks(Workqueue* workqueue) | |
1994 | { | |
1995 | return new Task_locker_block(*this->final_blocker_, workqueue); | |
1996 | } | |
1997 | ||
1998 | // Run the task. | |
1999 | ||
2000 | void | |
2001 | Write_after_input_sections_task::run(Workqueue*) | |
2002 | { | |
2003 | this->layout_->write_sections_after_input_sections(this->of_); | |
2004 | } | |
2005 | ||
92e059d8 | 2006 | // Close_task_runner methods. |
61ba1cf9 ILT |
2007 | |
2008 | // Run the task--close the file. | |
2009 | ||
2010 | void | |
92e059d8 | 2011 | Close_task_runner::run(Workqueue*) |
61ba1cf9 ILT |
2012 | { |
2013 | this->of_->close(); | |
2014 | } | |
2015 | ||
a2fb1b05 ILT |
2016 | // Instantiate the templates we need. We could use the configure |
2017 | // script to restrict this to only the ones for implemented targets. | |
2018 | ||
193a53d9 | 2019 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
2020 | template |
2021 | Output_section* | |
730cdc88 ILT |
2022 | Layout::layout<32, false>(Sized_relobj<32, false>* object, unsigned int shndx, |
2023 | const char* name, | |
2024 | const elfcpp::Shdr<32, false>& shdr, | |
2025 | unsigned int, unsigned int, off_t*); | |
193a53d9 | 2026 | #endif |
a2fb1b05 | 2027 | |
193a53d9 | 2028 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
2029 | template |
2030 | Output_section* | |
730cdc88 ILT |
2031 | Layout::layout<32, true>(Sized_relobj<32, true>* object, unsigned int shndx, |
2032 | const char* name, | |
2033 | const elfcpp::Shdr<32, true>& shdr, | |
2034 | unsigned int, unsigned int, off_t*); | |
193a53d9 | 2035 | #endif |
a2fb1b05 | 2036 | |
193a53d9 | 2037 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
2038 | template |
2039 | Output_section* | |
730cdc88 ILT |
2040 | Layout::layout<64, false>(Sized_relobj<64, false>* object, unsigned int shndx, |
2041 | const char* name, | |
2042 | const elfcpp::Shdr<64, false>& shdr, | |
2043 | unsigned int, unsigned int, off_t*); | |
193a53d9 | 2044 | #endif |
a2fb1b05 | 2045 | |
193a53d9 | 2046 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
2047 | template |
2048 | Output_section* | |
730cdc88 ILT |
2049 | Layout::layout<64, true>(Sized_relobj<64, true>* object, unsigned int shndx, |
2050 | const char* name, | |
2051 | const elfcpp::Shdr<64, true>& shdr, | |
2052 | unsigned int, unsigned int, off_t*); | |
193a53d9 | 2053 | #endif |
a2fb1b05 | 2054 | |
730cdc88 ILT |
2055 | #ifdef HAVE_TARGET_32_LITTLE |
2056 | template | |
2057 | Output_section* | |
2058 | Layout::layout_eh_frame<32, false>(Sized_relobj<32, false>* object, | |
2059 | const unsigned char* symbols, | |
2060 | off_t symbols_size, | |
2061 | const unsigned char* symbol_names, | |
2062 | off_t symbol_names_size, | |
2063 | unsigned int shndx, | |
2064 | const elfcpp::Shdr<32, false>& shdr, | |
2065 | unsigned int reloc_shndx, | |
2066 | unsigned int reloc_type, | |
2067 | off_t* off); | |
2068 | #endif | |
2069 | ||
2070 | #ifdef HAVE_TARGET_32_BIG | |
2071 | template | |
2072 | Output_section* | |
2073 | Layout::layout_eh_frame<32, true>(Sized_relobj<32, true>* object, | |
2074 | const unsigned char* symbols, | |
2075 | off_t symbols_size, | |
2076 | const unsigned char* symbol_names, | |
2077 | off_t symbol_names_size, | |
2078 | unsigned int shndx, | |
2079 | const elfcpp::Shdr<32, true>& shdr, | |
2080 | unsigned int reloc_shndx, | |
2081 | unsigned int reloc_type, | |
2082 | off_t* off); | |
2083 | #endif | |
2084 | ||
2085 | #ifdef HAVE_TARGET_64_LITTLE | |
2086 | template | |
2087 | Output_section* | |
2088 | Layout::layout_eh_frame<64, false>(Sized_relobj<64, false>* object, | |
2089 | const unsigned char* symbols, | |
2090 | off_t symbols_size, | |
2091 | const unsigned char* symbol_names, | |
2092 | off_t symbol_names_size, | |
2093 | unsigned int shndx, | |
2094 | const elfcpp::Shdr<64, false>& shdr, | |
2095 | unsigned int reloc_shndx, | |
2096 | unsigned int reloc_type, | |
2097 | off_t* off); | |
2098 | #endif | |
2099 | ||
2100 | #ifdef HAVE_TARGET_64_BIG | |
2101 | template | |
2102 | Output_section* | |
2103 | Layout::layout_eh_frame<64, true>(Sized_relobj<64, true>* object, | |
2104 | const unsigned char* symbols, | |
2105 | off_t symbols_size, | |
2106 | const unsigned char* symbol_names, | |
2107 | off_t symbol_names_size, | |
2108 | unsigned int shndx, | |
2109 | const elfcpp::Shdr<64, true>& shdr, | |
2110 | unsigned int reloc_shndx, | |
2111 | unsigned int reloc_type, | |
2112 | off_t* off); | |
2113 | #endif | |
a2fb1b05 ILT |
2114 | |
2115 | } // End namespace gold. |