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bae7f79e ILT |
1 | // object.cc -- support for an object file for linking in gold |
2 | ||
308ecdc7 | 3 | // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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 | ||
bae7f79e ILT |
23 | #include "gold.h" |
24 | ||
25 | #include <cerrno> | |
26 | #include <cstring> | |
645f8123 | 27 | #include <cstdarg> |
a2b1aa12 | 28 | #include "demangle.h" |
9a2d6984 | 29 | #include "libiberty.h" |
bae7f79e | 30 | |
6d03d481 | 31 | #include "gc.h" |
14bfc3f5 | 32 | #include "target-select.h" |
5c2c6c95 | 33 | #include "dwarf_reader.h" |
a2fb1b05 | 34 | #include "layout.h" |
61ba1cf9 | 35 | #include "output.h" |
f6ce93d6 | 36 | #include "symtab.h" |
92de84a6 | 37 | #include "cref.h" |
4c50553d | 38 | #include "reloc.h" |
f6ce93d6 ILT |
39 | #include "object.h" |
40 | #include "dynobj.h" | |
5995b570 | 41 | #include "plugin.h" |
a2e47362 | 42 | #include "compressed_output.h" |
09ec0418 | 43 | #include "incremental.h" |
bae7f79e ILT |
44 | |
45 | namespace gold | |
46 | { | |
47 | ||
00698fc5 CC |
48 | // Struct Read_symbols_data. |
49 | ||
50 | // Destroy any remaining File_view objects. | |
51 | ||
52 | Read_symbols_data::~Read_symbols_data() | |
53 | { | |
54 | if (this->section_headers != NULL) | |
55 | delete this->section_headers; | |
56 | if (this->section_names != NULL) | |
57 | delete this->section_names; | |
58 | if (this->symbols != NULL) | |
59 | delete this->symbols; | |
60 | if (this->symbol_names != NULL) | |
61 | delete this->symbol_names; | |
62 | if (this->versym != NULL) | |
63 | delete this->versym; | |
64 | if (this->verdef != NULL) | |
65 | delete this->verdef; | |
66 | if (this->verneed != NULL) | |
67 | delete this->verneed; | |
68 | } | |
69 | ||
d491d34e ILT |
70 | // Class Xindex. |
71 | ||
72 | // Initialize the symtab_xindex_ array. Find the SHT_SYMTAB_SHNDX | |
73 | // section and read it in. SYMTAB_SHNDX is the index of the symbol | |
74 | // table we care about. | |
75 | ||
76 | template<int size, bool big_endian> | |
77 | void | |
2ea97941 | 78 | Xindex::initialize_symtab_xindex(Object* object, unsigned int symtab_shndx) |
d491d34e ILT |
79 | { |
80 | if (!this->symtab_xindex_.empty()) | |
81 | return; | |
82 | ||
2ea97941 | 83 | gold_assert(symtab_shndx != 0); |
d491d34e ILT |
84 | |
85 | // Look through the sections in reverse order, on the theory that it | |
86 | // is more likely to be near the end than the beginning. | |
87 | unsigned int i = object->shnum(); | |
88 | while (i > 0) | |
89 | { | |
90 | --i; | |
91 | if (object->section_type(i) == elfcpp::SHT_SYMTAB_SHNDX | |
2ea97941 | 92 | && this->adjust_shndx(object->section_link(i)) == symtab_shndx) |
d491d34e ILT |
93 | { |
94 | this->read_symtab_xindex<size, big_endian>(object, i, NULL); | |
95 | return; | |
96 | } | |
97 | } | |
98 | ||
99 | object->error(_("missing SHT_SYMTAB_SHNDX section")); | |
100 | } | |
101 | ||
102 | // Read in the symtab_xindex_ array, given the section index of the | |
103 | // SHT_SYMTAB_SHNDX section. If PSHDRS is not NULL, it points at the | |
104 | // section headers. | |
105 | ||
106 | template<int size, bool big_endian> | |
107 | void | |
108 | Xindex::read_symtab_xindex(Object* object, unsigned int xindex_shndx, | |
109 | const unsigned char* pshdrs) | |
110 | { | |
111 | section_size_type bytecount; | |
112 | const unsigned char* contents; | |
113 | if (pshdrs == NULL) | |
114 | contents = object->section_contents(xindex_shndx, &bytecount, false); | |
115 | else | |
116 | { | |
117 | const unsigned char* p = (pshdrs | |
118 | + (xindex_shndx | |
119 | * elfcpp::Elf_sizes<size>::shdr_size)); | |
120 | typename elfcpp::Shdr<size, big_endian> shdr(p); | |
121 | bytecount = convert_to_section_size_type(shdr.get_sh_size()); | |
122 | contents = object->get_view(shdr.get_sh_offset(), bytecount, true, false); | |
123 | } | |
124 | ||
125 | gold_assert(this->symtab_xindex_.empty()); | |
126 | this->symtab_xindex_.reserve(bytecount / 4); | |
127 | for (section_size_type i = 0; i < bytecount; i += 4) | |
128 | { | |
129 | unsigned int shndx = elfcpp::Swap<32, big_endian>::readval(contents + i); | |
130 | // We preadjust the section indexes we save. | |
131 | this->symtab_xindex_.push_back(this->adjust_shndx(shndx)); | |
132 | } | |
133 | } | |
134 | ||
135 | // Symbol symndx has a section of SHN_XINDEX; return the real section | |
136 | // index. | |
137 | ||
138 | unsigned int | |
139 | Xindex::sym_xindex_to_shndx(Object* object, unsigned int symndx) | |
140 | { | |
141 | if (symndx >= this->symtab_xindex_.size()) | |
142 | { | |
143 | object->error(_("symbol %u out of range for SHT_SYMTAB_SHNDX section"), | |
144 | symndx); | |
145 | return elfcpp::SHN_UNDEF; | |
146 | } | |
147 | unsigned int shndx = this->symtab_xindex_[symndx]; | |
148 | if (shndx < elfcpp::SHN_LORESERVE || shndx >= object->shnum()) | |
149 | { | |
150 | object->error(_("extended index for symbol %u out of range: %u"), | |
151 | symndx, shndx); | |
152 | return elfcpp::SHN_UNDEF; | |
153 | } | |
154 | return shndx; | |
155 | } | |
156 | ||
645f8123 ILT |
157 | // Class Object. |
158 | ||
75f2446e ILT |
159 | // Report an error for this object file. This is used by the |
160 | // elfcpp::Elf_file interface, and also called by the Object code | |
161 | // itself. | |
645f8123 ILT |
162 | |
163 | void | |
75f2446e | 164 | Object::error(const char* format, ...) const |
645f8123 ILT |
165 | { |
166 | va_list args; | |
645f8123 | 167 | va_start(args, format); |
75f2446e ILT |
168 | char* buf = NULL; |
169 | if (vasprintf(&buf, format, args) < 0) | |
170 | gold_nomem(); | |
645f8123 | 171 | va_end(args); |
75f2446e ILT |
172 | gold_error(_("%s: %s"), this->name().c_str(), buf); |
173 | free(buf); | |
645f8123 ILT |
174 | } |
175 | ||
176 | // Return a view of the contents of a section. | |
177 | ||
178 | const unsigned char* | |
8383303e ILT |
179 | Object::section_contents(unsigned int shndx, section_size_type* plen, |
180 | bool cache) | |
645f8123 ILT |
181 | { |
182 | Location loc(this->do_section_contents(shndx)); | |
8383303e | 183 | *plen = convert_to_section_size_type(loc.data_size); |
8d63875c ILT |
184 | if (*plen == 0) |
185 | { | |
186 | static const unsigned char empty[1] = { '\0' }; | |
187 | return empty; | |
188 | } | |
39d0cb0e | 189 | return this->get_view(loc.file_offset, *plen, true, cache); |
645f8123 ILT |
190 | } |
191 | ||
6fa2a40b | 192 | // Read the section data into SD. This is code common to Sized_relobj_file |
dbe717ef ILT |
193 | // and Sized_dynobj, so we put it into Object. |
194 | ||
195 | template<int size, bool big_endian> | |
196 | void | |
197 | Object::read_section_data(elfcpp::Elf_file<size, big_endian, Object>* elf_file, | |
198 | Read_symbols_data* sd) | |
199 | { | |
200 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
201 | ||
202 | // Read the section headers. | |
203 | const off_t shoff = elf_file->shoff(); | |
2ea97941 ILT |
204 | const unsigned int shnum = this->shnum(); |
205 | sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size, | |
39d0cb0e | 206 | true, true); |
dbe717ef ILT |
207 | |
208 | // Read the section names. | |
209 | const unsigned char* pshdrs = sd->section_headers->data(); | |
210 | const unsigned char* pshdrnames = pshdrs + elf_file->shstrndx() * shdr_size; | |
211 | typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames); | |
212 | ||
213 | if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB) | |
75f2446e ILT |
214 | this->error(_("section name section has wrong type: %u"), |
215 | static_cast<unsigned int>(shdrnames.get_sh_type())); | |
dbe717ef | 216 | |
8383303e ILT |
217 | sd->section_names_size = |
218 | convert_to_section_size_type(shdrnames.get_sh_size()); | |
dbe717ef | 219 | sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(), |
39d0cb0e ILT |
220 | sd->section_names_size, false, |
221 | false); | |
dbe717ef ILT |
222 | } |
223 | ||
2ea97941 | 224 | // If NAME is the name of a special .gnu.warning section, arrange for |
dbe717ef ILT |
225 | // the warning to be issued. SHNDX is the section index. Return |
226 | // whether it is a warning section. | |
227 | ||
228 | bool | |
2ea97941 | 229 | Object::handle_gnu_warning_section(const char* name, unsigned int shndx, |
dbe717ef ILT |
230 | Symbol_table* symtab) |
231 | { | |
232 | const char warn_prefix[] = ".gnu.warning."; | |
233 | const int warn_prefix_len = sizeof warn_prefix - 1; | |
2ea97941 | 234 | if (strncmp(name, warn_prefix, warn_prefix_len) == 0) |
dbe717ef | 235 | { |
cb295612 ILT |
236 | // Read the section contents to get the warning text. It would |
237 | // be nicer if we only did this if we have to actually issue a | |
238 | // warning. Unfortunately, warnings are issued as we relocate | |
239 | // sections. That means that we can not lock the object then, | |
240 | // as we might try to issue the same warning multiple times | |
241 | // simultaneously. | |
242 | section_size_type len; | |
243 | const unsigned char* contents = this->section_contents(shndx, &len, | |
244 | false); | |
8d63875c ILT |
245 | if (len == 0) |
246 | { | |
2ea97941 | 247 | const char* warning = name + warn_prefix_len; |
8d63875c ILT |
248 | contents = reinterpret_cast<const unsigned char*>(warning); |
249 | len = strlen(warning); | |
250 | } | |
cb295612 | 251 | std::string warning(reinterpret_cast<const char*>(contents), len); |
2ea97941 | 252 | symtab->add_warning(name + warn_prefix_len, this, warning); |
dbe717ef ILT |
253 | return true; |
254 | } | |
255 | return false; | |
256 | } | |
257 | ||
2ea97941 | 258 | // If NAME is the name of the special section which indicates that |
9b547ce6 | 259 | // this object was compiled with -fsplit-stack, mark it accordingly. |
364c7fa5 ILT |
260 | |
261 | bool | |
2ea97941 | 262 | Object::handle_split_stack_section(const char* name) |
364c7fa5 | 263 | { |
2ea97941 | 264 | if (strcmp(name, ".note.GNU-split-stack") == 0) |
364c7fa5 ILT |
265 | { |
266 | this->uses_split_stack_ = true; | |
267 | return true; | |
268 | } | |
2ea97941 | 269 | if (strcmp(name, ".note.GNU-no-split-stack") == 0) |
364c7fa5 ILT |
270 | { |
271 | this->has_no_split_stack_ = true; | |
272 | return true; | |
273 | } | |
274 | return false; | |
275 | } | |
276 | ||
6d03d481 ST |
277 | // Class Relobj |
278 | ||
279 | // To copy the symbols data read from the file to a local data structure. | |
280 | // This function is called from do_layout only while doing garbage | |
281 | // collection. | |
282 | ||
283 | void | |
284 | Relobj::copy_symbols_data(Symbols_data* gc_sd, Read_symbols_data* sd, | |
285 | unsigned int section_header_size) | |
286 | { | |
287 | gc_sd->section_headers_data = | |
288 | new unsigned char[(section_header_size)]; | |
289 | memcpy(gc_sd->section_headers_data, sd->section_headers->data(), | |
290 | section_header_size); | |
291 | gc_sd->section_names_data = | |
292 | new unsigned char[sd->section_names_size]; | |
293 | memcpy(gc_sd->section_names_data, sd->section_names->data(), | |
294 | sd->section_names_size); | |
295 | gc_sd->section_names_size = sd->section_names_size; | |
296 | if (sd->symbols != NULL) | |
297 | { | |
298 | gc_sd->symbols_data = | |
299 | new unsigned char[sd->symbols_size]; | |
300 | memcpy(gc_sd->symbols_data, sd->symbols->data(), | |
301 | sd->symbols_size); | |
302 | } | |
303 | else | |
304 | { | |
305 | gc_sd->symbols_data = NULL; | |
306 | } | |
307 | gc_sd->symbols_size = sd->symbols_size; | |
308 | gc_sd->external_symbols_offset = sd->external_symbols_offset; | |
309 | if (sd->symbol_names != NULL) | |
310 | { | |
311 | gc_sd->symbol_names_data = | |
312 | new unsigned char[sd->symbol_names_size]; | |
313 | memcpy(gc_sd->symbol_names_data, sd->symbol_names->data(), | |
314 | sd->symbol_names_size); | |
315 | } | |
316 | else | |
317 | { | |
318 | gc_sd->symbol_names_data = NULL; | |
319 | } | |
320 | gc_sd->symbol_names_size = sd->symbol_names_size; | |
321 | } | |
322 | ||
323 | // This function determines if a particular section name must be included | |
324 | // in the link. This is used during garbage collection to determine the | |
325 | // roots of the worklist. | |
326 | ||
327 | bool | |
2ea97941 | 328 | Relobj::is_section_name_included(const char* name) |
6d03d481 | 329 | { |
2ea97941 ILT |
330 | if (is_prefix_of(".ctors", name) |
331 | || is_prefix_of(".dtors", name) | |
332 | || is_prefix_of(".note", name) | |
333 | || is_prefix_of(".init", name) | |
334 | || is_prefix_of(".fini", name) | |
335 | || is_prefix_of(".gcc_except_table", name) | |
336 | || is_prefix_of(".jcr", name) | |
337 | || is_prefix_of(".preinit_array", name) | |
338 | || (is_prefix_of(".text", name) | |
339 | && strstr(name, "personality")) | |
340 | || (is_prefix_of(".data", name) | |
341 | && strstr(name, "personality")) | |
fa618ee4 ILT |
342 | || (is_prefix_of(".gnu.linkonce.d", name) |
343 | && strstr(name, "personality"))) | |
6d03d481 ST |
344 | { |
345 | return true; | |
346 | } | |
347 | return false; | |
348 | } | |
349 | ||
09ec0418 CC |
350 | // Finalize the incremental relocation information. Allocates a block |
351 | // of relocation entries for each symbol, and sets the reloc_bases_ | |
cdc29364 CC |
352 | // array to point to the first entry in each block. If CLEAR_COUNTS |
353 | // is TRUE, also clear the per-symbol relocation counters. | |
09ec0418 CC |
354 | |
355 | void | |
cdc29364 | 356 | Relobj::finalize_incremental_relocs(Layout* layout, bool clear_counts) |
09ec0418 CC |
357 | { |
358 | unsigned int nsyms = this->get_global_symbols()->size(); | |
359 | this->reloc_bases_ = new unsigned int[nsyms]; | |
360 | ||
361 | gold_assert(this->reloc_bases_ != NULL); | |
362 | gold_assert(layout->incremental_inputs() != NULL); | |
363 | ||
364 | unsigned int rindex = layout->incremental_inputs()->get_reloc_count(); | |
365 | for (unsigned int i = 0; i < nsyms; ++i) | |
366 | { | |
367 | this->reloc_bases_[i] = rindex; | |
368 | rindex += this->reloc_counts_[i]; | |
cdc29364 CC |
369 | if (clear_counts) |
370 | this->reloc_counts_[i] = 0; | |
09ec0418 CC |
371 | } |
372 | layout->incremental_inputs()->set_reloc_count(rindex); | |
373 | } | |
374 | ||
f6ce93d6 | 375 | // Class Sized_relobj. |
bae7f79e | 376 | |
6fa2a40b CC |
377 | // Iterate over local symbols, calling a visitor class V for each GOT offset |
378 | // associated with a local symbol. | |
379 | ||
bae7f79e | 380 | template<int size, bool big_endian> |
6fa2a40b CC |
381 | void |
382 | Sized_relobj<size, big_endian>::do_for_all_local_got_entries( | |
383 | Got_offset_list::Visitor* v) const | |
384 | { | |
385 | unsigned int nsyms = this->local_symbol_count(); | |
386 | for (unsigned int i = 0; i < nsyms; i++) | |
387 | { | |
388 | Local_got_offsets::const_iterator p = this->local_got_offsets_.find(i); | |
389 | if (p != this->local_got_offsets_.end()) | |
390 | { | |
391 | const Got_offset_list* got_offsets = p->second; | |
392 | got_offsets->for_all_got_offsets(v); | |
393 | } | |
394 | } | |
395 | } | |
396 | ||
397 | // Class Sized_relobj_file. | |
398 | ||
399 | template<int size, bool big_endian> | |
400 | Sized_relobj_file<size, big_endian>::Sized_relobj_file( | |
2ea97941 ILT |
401 | const std::string& name, |
402 | Input_file* input_file, | |
403 | off_t offset, | |
bae7f79e | 404 | const elfcpp::Ehdr<size, big_endian>& ehdr) |
6fa2a40b | 405 | : Sized_relobj<size, big_endian>(name, input_file, offset), |
645f8123 | 406 | elf_file_(this, ehdr), |
dbe717ef | 407 | symtab_shndx_(-1U), |
61ba1cf9 ILT |
408 | local_symbol_count_(0), |
409 | output_local_symbol_count_(0), | |
7bf1f802 | 410 | output_local_dynsym_count_(0), |
730cdc88 | 411 | symbols_(), |
92de84a6 | 412 | defined_count_(0), |
61ba1cf9 | 413 | local_symbol_offset_(0), |
7bf1f802 | 414 | local_dynsym_offset_(0), |
e727fa71 | 415 | local_values_(), |
7223e9ca | 416 | local_plt_offsets_(), |
ef9beddf | 417 | kept_comdat_sections_(), |
805bb01c | 418 | has_eh_frame_(false), |
a2e47362 CC |
419 | discarded_eh_frame_shndx_(-1U), |
420 | deferred_layout_(), | |
421 | deferred_layout_relocs_(), | |
422 | compressed_sections_() | |
bae7f79e | 423 | { |
9590bf25 | 424 | this->e_type_ = ehdr.get_e_type(); |
bae7f79e ILT |
425 | } |
426 | ||
427 | template<int size, bool big_endian> | |
6fa2a40b | 428 | Sized_relobj_file<size, big_endian>::~Sized_relobj_file() |
bae7f79e ILT |
429 | { |
430 | } | |
431 | ||
645f8123 | 432 | // Set up an object file based on the file header. This sets up the |
029ba973 | 433 | // section information. |
bae7f79e ILT |
434 | |
435 | template<int size, bool big_endian> | |
436 | void | |
6fa2a40b | 437 | Sized_relobj_file<size, big_endian>::do_setup() |
bae7f79e | 438 | { |
2ea97941 ILT |
439 | const unsigned int shnum = this->elf_file_.shnum(); |
440 | this->set_shnum(shnum); | |
dbe717ef | 441 | } |
12e14209 | 442 | |
dbe717ef ILT |
443 | // Find the SHT_SYMTAB section, given the section headers. The ELF |
444 | // standard says that maybe in the future there can be more than one | |
445 | // SHT_SYMTAB section. Until somebody figures out how that could | |
446 | // work, we assume there is only one. | |
12e14209 | 447 | |
dbe717ef ILT |
448 | template<int size, bool big_endian> |
449 | void | |
6fa2a40b | 450 | Sized_relobj_file<size, big_endian>::find_symtab(const unsigned char* pshdrs) |
dbe717ef | 451 | { |
2ea97941 | 452 | const unsigned int shnum = this->shnum(); |
dbe717ef | 453 | this->symtab_shndx_ = 0; |
2ea97941 | 454 | if (shnum > 0) |
bae7f79e | 455 | { |
dbe717ef ILT |
456 | // Look through the sections in reverse order, since gas tends |
457 | // to put the symbol table at the end. | |
2ea97941 ILT |
458 | const unsigned char* p = pshdrs + shnum * This::shdr_size; |
459 | unsigned int i = shnum; | |
d491d34e ILT |
460 | unsigned int xindex_shndx = 0; |
461 | unsigned int xindex_link = 0; | |
dbe717ef | 462 | while (i > 0) |
bae7f79e | 463 | { |
dbe717ef ILT |
464 | --i; |
465 | p -= This::shdr_size; | |
466 | typename This::Shdr shdr(p); | |
467 | if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB) | |
468 | { | |
469 | this->symtab_shndx_ = i; | |
d491d34e ILT |
470 | if (xindex_shndx > 0 && xindex_link == i) |
471 | { | |
472 | Xindex* xindex = | |
473 | new Xindex(this->elf_file_.large_shndx_offset()); | |
474 | xindex->read_symtab_xindex<size, big_endian>(this, | |
475 | xindex_shndx, | |
476 | pshdrs); | |
477 | this->set_xindex(xindex); | |
478 | } | |
dbe717ef ILT |
479 | break; |
480 | } | |
d491d34e ILT |
481 | |
482 | // Try to pick up the SHT_SYMTAB_SHNDX section, if there is | |
483 | // one. This will work if it follows the SHT_SYMTAB | |
484 | // section. | |
485 | if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB_SHNDX) | |
486 | { | |
487 | xindex_shndx = i; | |
488 | xindex_link = this->adjust_shndx(shdr.get_sh_link()); | |
489 | } | |
bae7f79e | 490 | } |
bae7f79e ILT |
491 | } |
492 | } | |
493 | ||
d491d34e ILT |
494 | // Return the Xindex structure to use for object with lots of |
495 | // sections. | |
496 | ||
497 | template<int size, bool big_endian> | |
498 | Xindex* | |
6fa2a40b | 499 | Sized_relobj_file<size, big_endian>::do_initialize_xindex() |
d491d34e ILT |
500 | { |
501 | gold_assert(this->symtab_shndx_ != -1U); | |
502 | Xindex* xindex = new Xindex(this->elf_file_.large_shndx_offset()); | |
503 | xindex->initialize_symtab_xindex<size, big_endian>(this, this->symtab_shndx_); | |
504 | return xindex; | |
505 | } | |
506 | ||
730cdc88 ILT |
507 | // Return whether SHDR has the right type and flags to be a GNU |
508 | // .eh_frame section. | |
509 | ||
510 | template<int size, bool big_endian> | |
511 | bool | |
6fa2a40b | 512 | Sized_relobj_file<size, big_endian>::check_eh_frame_flags( |
730cdc88 ILT |
513 | const elfcpp::Shdr<size, big_endian>* shdr) const |
514 | { | |
4d5e4e62 ILT |
515 | elfcpp::Elf_Word sh_type = shdr->get_sh_type(); |
516 | return ((sh_type == elfcpp::SHT_PROGBITS | |
517 | || sh_type == elfcpp::SHT_X86_64_UNWIND) | |
1650c4ff | 518 | && (shdr->get_sh_flags() & elfcpp::SHF_ALLOC) != 0); |
730cdc88 ILT |
519 | } |
520 | ||
521 | // Return whether there is a GNU .eh_frame section, given the section | |
522 | // headers and the section names. | |
523 | ||
524 | template<int size, bool big_endian> | |
525 | bool | |
6fa2a40b | 526 | Sized_relobj_file<size, big_endian>::find_eh_frame( |
8383303e ILT |
527 | const unsigned char* pshdrs, |
528 | const char* names, | |
529 | section_size_type names_size) const | |
730cdc88 | 530 | { |
2ea97941 | 531 | const unsigned int shnum = this->shnum(); |
730cdc88 | 532 | const unsigned char* p = pshdrs + This::shdr_size; |
2ea97941 | 533 | for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size) |
730cdc88 ILT |
534 | { |
535 | typename This::Shdr shdr(p); | |
536 | if (this->check_eh_frame_flags(&shdr)) | |
537 | { | |
538 | if (shdr.get_sh_name() >= names_size) | |
539 | { | |
540 | this->error(_("bad section name offset for section %u: %lu"), | |
541 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
542 | continue; | |
543 | } | |
544 | ||
2ea97941 ILT |
545 | const char* name = names + shdr.get_sh_name(); |
546 | if (strcmp(name, ".eh_frame") == 0) | |
730cdc88 ILT |
547 | return true; |
548 | } | |
549 | } | |
550 | return false; | |
551 | } | |
552 | ||
5dd8762a CC |
553 | // Return TRUE if this is a section whose contents will be needed in the |
554 | // Add_symbols task. | |
555 | ||
556 | static bool | |
557 | need_decompressed_section(const char* name) | |
558 | { | |
559 | // We will need .zdebug_str if this is not an incremental link | |
560 | // (i.e., we are processing string merge sections). | |
561 | if (!parameters->incremental() && strcmp(name, ".zdebug_str") == 0) | |
562 | return true; | |
563 | ||
564 | return false; | |
565 | } | |
566 | ||
a2e47362 | 567 | // Build a table for any compressed debug sections, mapping each section index |
5dd8762a | 568 | // to the uncompressed size and (if needed) the decompressed contents. |
a2e47362 CC |
569 | |
570 | template<int size, bool big_endian> | |
571 | Compressed_section_map* | |
572 | build_compressed_section_map( | |
573 | const unsigned char* pshdrs, | |
574 | unsigned int shnum, | |
575 | const char* names, | |
576 | section_size_type names_size, | |
6fa2a40b | 577 | Sized_relobj_file<size, big_endian>* obj) |
a2e47362 | 578 | { |
5dd8762a | 579 | Compressed_section_map* uncompressed_map = new Compressed_section_map(); |
a2e47362 CC |
580 | const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; |
581 | const unsigned char* p = pshdrs + shdr_size; | |
5dd8762a | 582 | |
a2e47362 CC |
583 | for (unsigned int i = 1; i < shnum; ++i, p += shdr_size) |
584 | { | |
585 | typename elfcpp::Shdr<size, big_endian> shdr(p); | |
586 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS | |
587 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0) | |
588 | { | |
589 | if (shdr.get_sh_name() >= names_size) | |
590 | { | |
591 | obj->error(_("bad section name offset for section %u: %lu"), | |
592 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
593 | continue; | |
594 | } | |
595 | ||
596 | const char* name = names + shdr.get_sh_name(); | |
597 | if (is_compressed_debug_section(name)) | |
598 | { | |
599 | section_size_type len; | |
600 | const unsigned char* contents = | |
601 | obj->section_contents(i, &len, false); | |
602 | uint64_t uncompressed_size = get_uncompressed_size(contents, len); | |
603 | if (uncompressed_size != -1ULL) | |
5dd8762a CC |
604 | { |
605 | Compressed_section_info info; | |
606 | info.size = convert_to_section_size_type(uncompressed_size); | |
607 | info.contents = NULL; | |
608 | ||
609 | #ifdef ENABLE_THREADS | |
610 | // If we're multi-threaded, it will help to decompress | |
611 | // any sections that will be needed during the Add_symbols | |
612 | // task, so that several decompressions can run in | |
613 | // parallel. | |
614 | if (parameters->options().threads()) | |
615 | { | |
616 | unsigned char* uncompressed_data = NULL; | |
617 | if (need_decompressed_section(name)) | |
618 | { | |
619 | uncompressed_data = new unsigned char[uncompressed_size]; | |
620 | if (decompress_input_section(contents, len, | |
621 | uncompressed_data, | |
622 | uncompressed_size)) | |
623 | info.contents = uncompressed_data; | |
624 | else | |
625 | delete[] uncompressed_data; | |
626 | } | |
627 | } | |
628 | #endif | |
629 | ||
630 | (*uncompressed_map)[i] = info; | |
631 | } | |
a2e47362 CC |
632 | } |
633 | } | |
634 | } | |
5dd8762a | 635 | return uncompressed_map; |
a2e47362 CC |
636 | } |
637 | ||
12e14209 | 638 | // Read the sections and symbols from an object file. |
bae7f79e ILT |
639 | |
640 | template<int size, bool big_endian> | |
12e14209 | 641 | void |
6fa2a40b | 642 | Sized_relobj_file<size, big_endian>::do_read_symbols(Read_symbols_data* sd) |
bae7f79e | 643 | { |
dbe717ef | 644 | this->read_section_data(&this->elf_file_, sd); |
12e14209 | 645 | |
dbe717ef ILT |
646 | const unsigned char* const pshdrs = sd->section_headers->data(); |
647 | ||
648 | this->find_symtab(pshdrs); | |
12e14209 | 649 | |
730cdc88 ILT |
650 | const unsigned char* namesu = sd->section_names->data(); |
651 | const char* names = reinterpret_cast<const char*>(namesu); | |
1650c4ff ILT |
652 | if (memmem(names, sd->section_names_size, ".eh_frame", 10) != NULL) |
653 | { | |
654 | if (this->find_eh_frame(pshdrs, names, sd->section_names_size)) | |
655 | this->has_eh_frame_ = true; | |
656 | } | |
a2e47362 CC |
657 | if (memmem(names, sd->section_names_size, ".zdebug_", 8) != NULL) |
658 | this->compressed_sections_ = | |
659 | build_compressed_section_map(pshdrs, this->shnum(), names, | |
660 | sd->section_names_size, this); | |
730cdc88 | 661 | |
75f2446e ILT |
662 | sd->symbols = NULL; |
663 | sd->symbols_size = 0; | |
730cdc88 | 664 | sd->external_symbols_offset = 0; |
75f2446e ILT |
665 | sd->symbol_names = NULL; |
666 | sd->symbol_names_size = 0; | |
667 | ||
645f8123 | 668 | if (this->symtab_shndx_ == 0) |
bae7f79e ILT |
669 | { |
670 | // No symbol table. Weird but legal. | |
12e14209 | 671 | return; |
bae7f79e ILT |
672 | } |
673 | ||
12e14209 ILT |
674 | // Get the symbol table section header. |
675 | typename This::Shdr symtabshdr(pshdrs | |
645f8123 | 676 | + this->symtab_shndx_ * This::shdr_size); |
a3ad94ed | 677 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
bae7f79e | 678 | |
730cdc88 ILT |
679 | // If this object has a .eh_frame section, we need all the symbols. |
680 | // Otherwise we only need the external symbols. While it would be | |
681 | // simpler to just always read all the symbols, I've seen object | |
682 | // files with well over 2000 local symbols, which for a 64-bit | |
683 | // object file format is over 5 pages that we don't need to read | |
684 | // now. | |
685 | ||
2ea97941 | 686 | const int sym_size = This::sym_size; |
92e059d8 ILT |
687 | const unsigned int loccount = symtabshdr.get_sh_info(); |
688 | this->local_symbol_count_ = loccount; | |
7bf1f802 | 689 | this->local_values_.resize(loccount); |
2ea97941 | 690 | section_offset_type locsize = loccount * sym_size; |
730cdc88 | 691 | off_t dataoff = symtabshdr.get_sh_offset(); |
8383303e ILT |
692 | section_size_type datasize = |
693 | convert_to_section_size_type(symtabshdr.get_sh_size()); | |
730cdc88 | 694 | off_t extoff = dataoff + locsize; |
8383303e | 695 | section_size_type extsize = datasize - locsize; |
75f65a3e | 696 | |
730cdc88 | 697 | off_t readoff = this->has_eh_frame_ ? dataoff : extoff; |
8383303e | 698 | section_size_type readsize = this->has_eh_frame_ ? datasize : extsize; |
730cdc88 | 699 | |
3f2e6a2d CC |
700 | if (readsize == 0) |
701 | { | |
702 | // No external symbols. Also weird but also legal. | |
703 | return; | |
704 | } | |
705 | ||
39d0cb0e | 706 | File_view* fvsymtab = this->get_lasting_view(readoff, readsize, true, false); |
bae7f79e ILT |
707 | |
708 | // Read the section header for the symbol names. | |
d491d34e | 709 | unsigned int strtab_shndx = this->adjust_shndx(symtabshdr.get_sh_link()); |
dbe717ef | 710 | if (strtab_shndx >= this->shnum()) |
bae7f79e | 711 | { |
75f2446e ILT |
712 | this->error(_("invalid symbol table name index: %u"), strtab_shndx); |
713 | return; | |
bae7f79e | 714 | } |
dbe717ef | 715 | typename This::Shdr strtabshdr(pshdrs + strtab_shndx * This::shdr_size); |
bae7f79e ILT |
716 | if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB) |
717 | { | |
75f2446e ILT |
718 | this->error(_("symbol table name section has wrong type: %u"), |
719 | static_cast<unsigned int>(strtabshdr.get_sh_type())); | |
720 | return; | |
bae7f79e ILT |
721 | } |
722 | ||
723 | // Read the symbol names. | |
724 | File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(), | |
39d0cb0e ILT |
725 | strtabshdr.get_sh_size(), |
726 | false, true); | |
bae7f79e | 727 | |
12e14209 | 728 | sd->symbols = fvsymtab; |
730cdc88 ILT |
729 | sd->symbols_size = readsize; |
730 | sd->external_symbols_offset = this->has_eh_frame_ ? locsize : 0; | |
12e14209 | 731 | sd->symbol_names = fvstrtab; |
8383303e ILT |
732 | sd->symbol_names_size = |
733 | convert_to_section_size_type(strtabshdr.get_sh_size()); | |
a2fb1b05 ILT |
734 | } |
735 | ||
730cdc88 | 736 | // Return the section index of symbol SYM. Set *VALUE to its value in |
d491d34e | 737 | // the object file. Set *IS_ORDINARY if this is an ordinary section |
9b547ce6 | 738 | // index, not a special code between SHN_LORESERVE and SHN_HIRESERVE. |
d491d34e ILT |
739 | // Note that for a symbol which is not defined in this object file, |
740 | // this will set *VALUE to 0 and return SHN_UNDEF; it will not return | |
741 | // the final value of the symbol in the link. | |
730cdc88 ILT |
742 | |
743 | template<int size, bool big_endian> | |
744 | unsigned int | |
6fa2a40b CC |
745 | Sized_relobj_file<size, big_endian>::symbol_section_and_value(unsigned int sym, |
746 | Address* value, | |
747 | bool* is_ordinary) | |
730cdc88 | 748 | { |
8383303e | 749 | section_size_type symbols_size; |
730cdc88 ILT |
750 | const unsigned char* symbols = this->section_contents(this->symtab_shndx_, |
751 | &symbols_size, | |
752 | false); | |
753 | ||
754 | const size_t count = symbols_size / This::sym_size; | |
755 | gold_assert(sym < count); | |
756 | ||
757 | elfcpp::Sym<size, big_endian> elfsym(symbols + sym * This::sym_size); | |
758 | *value = elfsym.get_st_value(); | |
d491d34e ILT |
759 | |
760 | return this->adjust_sym_shndx(sym, elfsym.get_st_shndx(), is_ordinary); | |
730cdc88 ILT |
761 | } |
762 | ||
a2fb1b05 ILT |
763 | // Return whether to include a section group in the link. LAYOUT is |
764 | // used to keep track of which section groups we have already seen. | |
765 | // INDEX is the index of the section group and SHDR is the section | |
766 | // header. If we do not want to include this group, we set bits in | |
767 | // OMIT for each section which should be discarded. | |
768 | ||
769 | template<int size, bool big_endian> | |
770 | bool | |
6fa2a40b | 771 | Sized_relobj_file<size, big_endian>::include_section_group( |
6a74a719 | 772 | Symbol_table* symtab, |
2ea97941 | 773 | Layout* layout, |
a2fb1b05 | 774 | unsigned int index, |
2ea97941 | 775 | const char* name, |
e94cf127 CC |
776 | const unsigned char* shdrs, |
777 | const char* section_names, | |
778 | section_size_type section_names_size, | |
a2fb1b05 ILT |
779 | std::vector<bool>* omit) |
780 | { | |
781 | // Read the section contents. | |
e94cf127 | 782 | typename This::Shdr shdr(shdrs + index * This::shdr_size); |
a2fb1b05 | 783 | const unsigned char* pcon = this->get_view(shdr.get_sh_offset(), |
39d0cb0e | 784 | shdr.get_sh_size(), true, false); |
a2fb1b05 ILT |
785 | const elfcpp::Elf_Word* pword = |
786 | reinterpret_cast<const elfcpp::Elf_Word*>(pcon); | |
787 | ||
788 | // The first word contains flags. We only care about COMDAT section | |
789 | // groups. Other section groups are always included in the link | |
790 | // just like ordinary sections. | |
f6ce93d6 | 791 | elfcpp::Elf_Word flags = elfcpp::Swap<32, big_endian>::readval(pword); |
a2fb1b05 | 792 | |
41f9cbbe ILT |
793 | // Look up the group signature, which is the name of a symbol. ELF |
794 | // uses a symbol name because some group signatures are long, and | |
795 | // the name is generally already in the symbol table, so it makes | |
796 | // sense to put the long string just once in .strtab rather than in | |
797 | // both .strtab and .shstrtab. | |
a2fb1b05 ILT |
798 | |
799 | // Get the appropriate symbol table header (this will normally be | |
800 | // the single SHT_SYMTAB section, but in principle it need not be). | |
d491d34e | 801 | const unsigned int link = this->adjust_shndx(shdr.get_sh_link()); |
645f8123 | 802 | typename This::Shdr symshdr(this, this->elf_file_.section_header(link)); |
a2fb1b05 ILT |
803 | |
804 | // Read the symbol table entry. | |
d491d34e ILT |
805 | unsigned int symndx = shdr.get_sh_info(); |
806 | if (symndx >= symshdr.get_sh_size() / This::sym_size) | |
a2fb1b05 | 807 | { |
75f2446e | 808 | this->error(_("section group %u info %u out of range"), |
d491d34e | 809 | index, symndx); |
75f2446e | 810 | return false; |
a2fb1b05 | 811 | } |
d491d34e | 812 | off_t symoff = symshdr.get_sh_offset() + symndx * This::sym_size; |
39d0cb0e ILT |
813 | const unsigned char* psym = this->get_view(symoff, This::sym_size, true, |
814 | false); | |
a2fb1b05 ILT |
815 | elfcpp::Sym<size, big_endian> sym(psym); |
816 | ||
a2fb1b05 | 817 | // Read the symbol table names. |
8383303e | 818 | section_size_type symnamelen; |
645f8123 | 819 | const unsigned char* psymnamesu; |
d491d34e ILT |
820 | psymnamesu = this->section_contents(this->adjust_shndx(symshdr.get_sh_link()), |
821 | &symnamelen, true); | |
a2fb1b05 ILT |
822 | const char* psymnames = reinterpret_cast<const char*>(psymnamesu); |
823 | ||
824 | // Get the section group signature. | |
645f8123 | 825 | if (sym.get_st_name() >= symnamelen) |
a2fb1b05 | 826 | { |
75f2446e | 827 | this->error(_("symbol %u name offset %u out of range"), |
d491d34e | 828 | symndx, sym.get_st_name()); |
75f2446e | 829 | return false; |
a2fb1b05 ILT |
830 | } |
831 | ||
e94cf127 | 832 | std::string signature(psymnames + sym.get_st_name()); |
a2fb1b05 | 833 | |
ead1e424 ILT |
834 | // It seems that some versions of gas will create a section group |
835 | // associated with a section symbol, and then fail to give a name to | |
836 | // the section symbol. In such a case, use the name of the section. | |
645f8123 | 837 | if (signature[0] == '\0' && sym.get_st_type() == elfcpp::STT_SECTION) |
ead1e424 | 838 | { |
d491d34e ILT |
839 | bool is_ordinary; |
840 | unsigned int sym_shndx = this->adjust_sym_shndx(symndx, | |
841 | sym.get_st_shndx(), | |
842 | &is_ordinary); | |
843 | if (!is_ordinary || sym_shndx >= this->shnum()) | |
844 | { | |
845 | this->error(_("symbol %u invalid section index %u"), | |
846 | symndx, sym_shndx); | |
847 | return false; | |
848 | } | |
e94cf127 CC |
849 | typename This::Shdr member_shdr(shdrs + sym_shndx * This::shdr_size); |
850 | if (member_shdr.get_sh_name() < section_names_size) | |
851 | signature = section_names + member_shdr.get_sh_name(); | |
ead1e424 ILT |
852 | } |
853 | ||
e94cf127 CC |
854 | // Record this section group in the layout, and see whether we've already |
855 | // seen one with the same signature. | |
8a4c0b0d | 856 | bool include_group; |
1ef4d87f ILT |
857 | bool is_comdat; |
858 | Kept_section* kept_section = NULL; | |
6a74a719 | 859 | |
8a4c0b0d | 860 | if ((flags & elfcpp::GRP_COMDAT) == 0) |
1ef4d87f ILT |
861 | { |
862 | include_group = true; | |
863 | is_comdat = false; | |
864 | } | |
8a4c0b0d | 865 | else |
e94cf127 | 866 | { |
2ea97941 ILT |
867 | include_group = layout->find_or_add_kept_section(signature, |
868 | this, index, true, | |
869 | true, &kept_section); | |
1ef4d87f | 870 | is_comdat = true; |
6a74a719 | 871 | } |
a2fb1b05 | 872 | |
89d8a36b CC |
873 | if (is_comdat && include_group) |
874 | { | |
875 | Incremental_inputs* incremental_inputs = layout->incremental_inputs(); | |
876 | if (incremental_inputs != NULL) | |
877 | incremental_inputs->report_comdat_group(this, signature.c_str()); | |
878 | } | |
879 | ||
a2fb1b05 | 880 | size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word); |
8825ac63 ILT |
881 | |
882 | std::vector<unsigned int> shndxes; | |
883 | bool relocate_group = include_group && parameters->options().relocatable(); | |
884 | if (relocate_group) | |
885 | shndxes.reserve(count - 1); | |
886 | ||
a2fb1b05 ILT |
887 | for (size_t i = 1; i < count; ++i) |
888 | { | |
1ef4d87f | 889 | elfcpp::Elf_Word shndx = |
8825ac63 ILT |
890 | this->adjust_shndx(elfcpp::Swap<32, big_endian>::readval(pword + i)); |
891 | ||
892 | if (relocate_group) | |
1ef4d87f | 893 | shndxes.push_back(shndx); |
8825ac63 | 894 | |
1ef4d87f | 895 | if (shndx >= this->shnum()) |
a2fb1b05 | 896 | { |
75f2446e | 897 | this->error(_("section %u in section group %u out of range"), |
1ef4d87f | 898 | shndx, index); |
75f2446e | 899 | continue; |
a2fb1b05 | 900 | } |
55438702 ILT |
901 | |
902 | // Check for an earlier section number, since we're going to get | |
903 | // it wrong--we may have already decided to include the section. | |
1ef4d87f | 904 | if (shndx < index) |
55438702 | 905 | this->error(_("invalid section group %u refers to earlier section %u"), |
1ef4d87f | 906 | index, shndx); |
55438702 | 907 | |
e94cf127 | 908 | // Get the name of the member section. |
1ef4d87f | 909 | typename This::Shdr member_shdr(shdrs + shndx * This::shdr_size); |
e94cf127 CC |
910 | if (member_shdr.get_sh_name() >= section_names_size) |
911 | { | |
912 | // This is an error, but it will be diagnosed eventually | |
913 | // in do_layout, so we don't need to do anything here but | |
914 | // ignore it. | |
915 | continue; | |
916 | } | |
917 | std::string mname(section_names + member_shdr.get_sh_name()); | |
918 | ||
1ef4d87f ILT |
919 | if (include_group) |
920 | { | |
921 | if (is_comdat) | |
922 | kept_section->add_comdat_section(mname, shndx, | |
923 | member_shdr.get_sh_size()); | |
924 | } | |
925 | else | |
e94cf127 | 926 | { |
1ef4d87f ILT |
927 | (*omit)[shndx] = true; |
928 | ||
929 | if (is_comdat) | |
e94cf127 | 930 | { |
1ef4d87f ILT |
931 | Relobj* kept_object = kept_section->object(); |
932 | if (kept_section->is_comdat()) | |
933 | { | |
934 | // Find the corresponding kept section, and store | |
935 | // that info in the discarded section table. | |
936 | unsigned int kept_shndx; | |
937 | uint64_t kept_size; | |
938 | if (kept_section->find_comdat_section(mname, &kept_shndx, | |
939 | &kept_size)) | |
940 | { | |
941 | // We don't keep a mapping for this section if | |
942 | // it has a different size. The mapping is only | |
943 | // used for relocation processing, and we don't | |
944 | // want to treat the sections as similar if the | |
945 | // sizes are different. Checking the section | |
946 | // size is the approach used by the GNU linker. | |
947 | if (kept_size == member_shdr.get_sh_size()) | |
948 | this->set_kept_comdat_section(shndx, kept_object, | |
949 | kept_shndx); | |
950 | } | |
951 | } | |
952 | else | |
953 | { | |
954 | // The existing section is a linkonce section. Add | |
955 | // a mapping if there is exactly one section in the | |
956 | // group (which is true when COUNT == 2) and if it | |
957 | // is the same size. | |
958 | if (count == 2 | |
959 | && (kept_section->linkonce_size() | |
960 | == member_shdr.get_sh_size())) | |
961 | this->set_kept_comdat_section(shndx, kept_object, | |
962 | kept_section->shndx()); | |
963 | } | |
e94cf127 CC |
964 | } |
965 | } | |
a2fb1b05 ILT |
966 | } |
967 | ||
8825ac63 | 968 | if (relocate_group) |
2ea97941 ILT |
969 | layout->layout_group(symtab, this, index, name, signature.c_str(), |
970 | shdr, flags, &shndxes); | |
8825ac63 | 971 | |
e94cf127 | 972 | return include_group; |
a2fb1b05 ILT |
973 | } |
974 | ||
975 | // Whether to include a linkonce section in the link. NAME is the | |
976 | // name of the section and SHDR is the section header. | |
977 | ||
978 | // Linkonce sections are a GNU extension implemented in the original | |
979 | // GNU linker before section groups were defined. The semantics are | |
980 | // that we only include one linkonce section with a given name. The | |
981 | // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME, | |
982 | // where T is the type of section and SYMNAME is the name of a symbol. | |
983 | // In an attempt to make linkonce sections interact well with section | |
984 | // groups, we try to identify SYMNAME and use it like a section group | |
985 | // signature. We want to block section groups with that signature, | |
986 | // but not other linkonce sections with that signature. We also use | |
987 | // the full name of the linkonce section as a normal section group | |
988 | // signature. | |
989 | ||
990 | template<int size, bool big_endian> | |
991 | bool | |
6fa2a40b | 992 | Sized_relobj_file<size, big_endian>::include_linkonce_section( |
2ea97941 | 993 | Layout* layout, |
e94cf127 | 994 | unsigned int index, |
2ea97941 | 995 | const char* name, |
1ef4d87f | 996 | const elfcpp::Shdr<size, big_endian>& shdr) |
a2fb1b05 | 997 | { |
1ef4d87f | 998 | typename elfcpp::Elf_types<size>::Elf_WXword sh_size = shdr.get_sh_size(); |
ad435a24 ILT |
999 | // In general the symbol name we want will be the string following |
1000 | // the last '.'. However, we have to handle the case of | |
1001 | // .gnu.linkonce.t.__i686.get_pc_thunk.bx, which was generated by | |
1002 | // some versions of gcc. So we use a heuristic: if the name starts | |
1003 | // with ".gnu.linkonce.t.", we use everything after that. Otherwise | |
1004 | // we look for the last '.'. We can't always simply skip | |
1005 | // ".gnu.linkonce.X", because we have to deal with cases like | |
1006 | // ".gnu.linkonce.d.rel.ro.local". | |
1007 | const char* const linkonce_t = ".gnu.linkonce.t."; | |
1008 | const char* symname; | |
2ea97941 ILT |
1009 | if (strncmp(name, linkonce_t, strlen(linkonce_t)) == 0) |
1010 | symname = name + strlen(linkonce_t); | |
ad435a24 | 1011 | else |
2ea97941 | 1012 | symname = strrchr(name, '.') + 1; |
e94cf127 | 1013 | std::string sig1(symname); |
2ea97941 | 1014 | std::string sig2(name); |
8a4c0b0d ILT |
1015 | Kept_section* kept1; |
1016 | Kept_section* kept2; | |
2ea97941 ILT |
1017 | bool include1 = layout->find_or_add_kept_section(sig1, this, index, false, |
1018 | false, &kept1); | |
1019 | bool include2 = layout->find_or_add_kept_section(sig2, this, index, false, | |
1020 | true, &kept2); | |
e94cf127 CC |
1021 | |
1022 | if (!include2) | |
1023 | { | |
1ef4d87f ILT |
1024 | // We are not including this section because we already saw the |
1025 | // name of the section as a signature. This normally implies | |
1026 | // that the kept section is another linkonce section. If it is | |
1027 | // the same size, record it as the section which corresponds to | |
1028 | // this one. | |
1029 | if (kept2->object() != NULL | |
1030 | && !kept2->is_comdat() | |
1031 | && kept2->linkonce_size() == sh_size) | |
1032 | this->set_kept_comdat_section(index, kept2->object(), kept2->shndx()); | |
e94cf127 CC |
1033 | } |
1034 | else if (!include1) | |
1035 | { | |
1036 | // The section is being discarded on the basis of its symbol | |
1037 | // name. This means that the corresponding kept section was | |
1038 | // part of a comdat group, and it will be difficult to identify | |
1039 | // the specific section within that group that corresponds to | |
1040 | // this linkonce section. We'll handle the simple case where | |
1041 | // the group has only one member section. Otherwise, it's not | |
1042 | // worth the effort. | |
1ef4d87f ILT |
1043 | unsigned int kept_shndx; |
1044 | uint64_t kept_size; | |
1045 | if (kept1->object() != NULL | |
1046 | && kept1->is_comdat() | |
1047 | && kept1->find_single_comdat_section(&kept_shndx, &kept_size) | |
1048 | && kept_size == sh_size) | |
1049 | this->set_kept_comdat_section(index, kept1->object(), kept_shndx); | |
1050 | } | |
1051 | else | |
1052 | { | |
1053 | kept1->set_linkonce_size(sh_size); | |
1054 | kept2->set_linkonce_size(sh_size); | |
e94cf127 CC |
1055 | } |
1056 | ||
a783673b | 1057 | return include1 && include2; |
a2fb1b05 ILT |
1058 | } |
1059 | ||
5995b570 CC |
1060 | // Layout an input section. |
1061 | ||
1062 | template<int size, bool big_endian> | |
1063 | inline void | |
14788a3f ILT |
1064 | Sized_relobj_file<size, big_endian>::layout_section( |
1065 | Layout* layout, | |
1066 | unsigned int shndx, | |
1067 | const char* name, | |
1068 | const typename This::Shdr& shdr, | |
1069 | unsigned int reloc_shndx, | |
1070 | unsigned int reloc_type) | |
5995b570 | 1071 | { |
2ea97941 ILT |
1072 | off_t offset; |
1073 | Output_section* os = layout->layout(this, shndx, name, shdr, | |
1074 | reloc_shndx, reloc_type, &offset); | |
5995b570 CC |
1075 | |
1076 | this->output_sections()[shndx] = os; | |
2ea97941 | 1077 | if (offset == -1) |
6fa2a40b | 1078 | this->section_offsets()[shndx] = invalid_address; |
5995b570 | 1079 | else |
6fa2a40b | 1080 | this->section_offsets()[shndx] = convert_types<Address, off_t>(offset); |
5995b570 CC |
1081 | |
1082 | // If this section requires special handling, and if there are | |
1083 | // relocs that apply to it, then we must do the special handling | |
1084 | // before we apply the relocs. | |
2ea97941 | 1085 | if (offset == -1 && reloc_shndx != 0) |
5995b570 CC |
1086 | this->set_relocs_must_follow_section_writes(); |
1087 | } | |
1088 | ||
14788a3f ILT |
1089 | // Layout an input .eh_frame section. |
1090 | ||
1091 | template<int size, bool big_endian> | |
1092 | void | |
1093 | Sized_relobj_file<size, big_endian>::layout_eh_frame_section( | |
1094 | Layout* layout, | |
1095 | const unsigned char* symbols_data, | |
1096 | section_size_type symbols_size, | |
1097 | const unsigned char* symbol_names_data, | |
1098 | section_size_type symbol_names_size, | |
1099 | unsigned int shndx, | |
1100 | const typename This::Shdr& shdr, | |
1101 | unsigned int reloc_shndx, | |
1102 | unsigned int reloc_type) | |
1103 | { | |
1104 | gold_assert(this->has_eh_frame_); | |
1105 | ||
1106 | off_t offset; | |
1107 | Output_section* os = layout->layout_eh_frame(this, | |
1108 | symbols_data, | |
1109 | symbols_size, | |
1110 | symbol_names_data, | |
1111 | symbol_names_size, | |
1112 | shndx, | |
1113 | shdr, | |
1114 | reloc_shndx, | |
1115 | reloc_type, | |
1116 | &offset); | |
1117 | this->output_sections()[shndx] = os; | |
1118 | if (os == NULL || offset == -1) | |
1119 | { | |
1120 | // An object can contain at most one section holding exception | |
1121 | // frame information. | |
1122 | gold_assert(this->discarded_eh_frame_shndx_ == -1U); | |
1123 | this->discarded_eh_frame_shndx_ = shndx; | |
1124 | this->section_offsets()[shndx] = invalid_address; | |
1125 | } | |
1126 | else | |
1127 | this->section_offsets()[shndx] = convert_types<Address, off_t>(offset); | |
1128 | ||
1129 | // If this section requires special handling, and if there are | |
1130 | // relocs that aply to it, then we must do the special handling | |
1131 | // before we apply the relocs. | |
1132 | if (os != NULL && offset == -1 && reloc_shndx != 0) | |
1133 | this->set_relocs_must_follow_section_writes(); | |
1134 | } | |
1135 | ||
a2fb1b05 ILT |
1136 | // Lay out the input sections. We walk through the sections and check |
1137 | // whether they should be included in the link. If they should, we | |
1138 | // pass them to the Layout object, which will return an output section | |
6d03d481 | 1139 | // and an offset. |
ef15dade ST |
1140 | // During garbage collection (--gc-sections) and identical code folding |
1141 | // (--icf), this function is called twice. When it is called the first | |
1142 | // time, it is for setting up some sections as roots to a work-list for | |
1143 | // --gc-sections and to do comdat processing. Actual layout happens the | |
1144 | // second time around after all the relevant sections have been determined. | |
1145 | // The first time, is_worklist_ready or is_icf_ready is false. It is then | |
1146 | // set to true after the garbage collection worklist or identical code | |
1147 | // folding is processed and the relevant sections to be kept are | |
1148 | // determined. Then, this function is called again to layout the sections. | |
a2fb1b05 ILT |
1149 | |
1150 | template<int size, bool big_endian> | |
1151 | void | |
6fa2a40b CC |
1152 | Sized_relobj_file<size, big_endian>::do_layout(Symbol_table* symtab, |
1153 | Layout* layout, | |
1154 | Read_symbols_data* sd) | |
a2fb1b05 | 1155 | { |
2ea97941 | 1156 | const unsigned int shnum = this->shnum(); |
ef15dade ST |
1157 | bool is_gc_pass_one = ((parameters->options().gc_sections() |
1158 | && !symtab->gc()->is_worklist_ready()) | |
032ce4e9 | 1159 | || (parameters->options().icf_enabled() |
ef15dade ST |
1160 | && !symtab->icf()->is_icf_ready())); |
1161 | ||
1162 | bool is_gc_pass_two = ((parameters->options().gc_sections() | |
1163 | && symtab->gc()->is_worklist_ready()) | |
032ce4e9 | 1164 | || (parameters->options().icf_enabled() |
ef15dade ST |
1165 | && symtab->icf()->is_icf_ready())); |
1166 | ||
1167 | bool is_gc_or_icf = (parameters->options().gc_sections() | |
032ce4e9 | 1168 | || parameters->options().icf_enabled()); |
ef15dade ST |
1169 | |
1170 | // Both is_gc_pass_one and is_gc_pass_two should not be true. | |
1171 | gold_assert(!(is_gc_pass_one && is_gc_pass_two)); | |
1172 | ||
2ea97941 | 1173 | if (shnum == 0) |
12e14209 | 1174 | return; |
e0ebcf42 | 1175 | Symbols_data* gc_sd = NULL; |
6d03d481 ST |
1176 | if (is_gc_pass_one) |
1177 | { | |
1178 | // During garbage collection save the symbols data to use it when | |
1179 | // re-entering this function. | |
1180 | gc_sd = new Symbols_data; | |
2ea97941 | 1181 | this->copy_symbols_data(gc_sd, sd, This::shdr_size * shnum); |
6d03d481 ST |
1182 | this->set_symbols_data(gc_sd); |
1183 | } | |
1184 | else if (is_gc_pass_two) | |
1185 | { | |
1186 | gc_sd = this->get_symbols_data(); | |
1187 | } | |
1188 | ||
1189 | const unsigned char* section_headers_data = NULL; | |
1190 | section_size_type section_names_size; | |
1191 | const unsigned char* symbols_data = NULL; | |
1192 | section_size_type symbols_size; | |
6d03d481 ST |
1193 | const unsigned char* symbol_names_data = NULL; |
1194 | section_size_type symbol_names_size; | |
1195 | ||
ef15dade | 1196 | if (is_gc_or_icf) |
6d03d481 ST |
1197 | { |
1198 | section_headers_data = gc_sd->section_headers_data; | |
1199 | section_names_size = gc_sd->section_names_size; | |
1200 | symbols_data = gc_sd->symbols_data; | |
1201 | symbols_size = gc_sd->symbols_size; | |
6d03d481 ST |
1202 | symbol_names_data = gc_sd->symbol_names_data; |
1203 | symbol_names_size = gc_sd->symbol_names_size; | |
1204 | } | |
1205 | else | |
1206 | { | |
1207 | section_headers_data = sd->section_headers->data(); | |
1208 | section_names_size = sd->section_names_size; | |
1209 | if (sd->symbols != NULL) | |
1210 | symbols_data = sd->symbols->data(); | |
1211 | symbols_size = sd->symbols_size; | |
6d03d481 ST |
1212 | if (sd->symbol_names != NULL) |
1213 | symbol_names_data = sd->symbol_names->data(); | |
1214 | symbol_names_size = sd->symbol_names_size; | |
1215 | } | |
a2fb1b05 ILT |
1216 | |
1217 | // Get the section headers. | |
6d03d481 | 1218 | const unsigned char* shdrs = section_headers_data; |
e94cf127 | 1219 | const unsigned char* pshdrs; |
a2fb1b05 ILT |
1220 | |
1221 | // Get the section names. | |
ef15dade ST |
1222 | const unsigned char* pnamesu = (is_gc_or_icf) |
1223 | ? gc_sd->section_names_data | |
1224 | : sd->section_names->data(); | |
1225 | ||
a2fb1b05 ILT |
1226 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
1227 | ||
5995b570 CC |
1228 | // If any input files have been claimed by plugins, we need to defer |
1229 | // actual layout until the replacement files have arrived. | |
1230 | const bool should_defer_layout = | |
1231 | (parameters->options().has_plugins() | |
1232 | && parameters->options().plugins()->should_defer_layout()); | |
1233 | unsigned int num_sections_to_defer = 0; | |
1234 | ||
730cdc88 ILT |
1235 | // For each section, record the index of the reloc section if any. |
1236 | // Use 0 to mean that there is no reloc section, -1U to mean that | |
1237 | // there is more than one. | |
2ea97941 ILT |
1238 | std::vector<unsigned int> reloc_shndx(shnum, 0); |
1239 | std::vector<unsigned int> reloc_type(shnum, elfcpp::SHT_NULL); | |
730cdc88 | 1240 | // Skip the first, dummy, section. |
e94cf127 | 1241 | pshdrs = shdrs + This::shdr_size; |
2ea97941 | 1242 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) |
730cdc88 ILT |
1243 | { |
1244 | typename This::Shdr shdr(pshdrs); | |
1245 | ||
5995b570 CC |
1246 | // Count the number of sections whose layout will be deferred. |
1247 | if (should_defer_layout && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC)) | |
1248 | ++num_sections_to_defer; | |
1249 | ||
730cdc88 ILT |
1250 | unsigned int sh_type = shdr.get_sh_type(); |
1251 | if (sh_type == elfcpp::SHT_REL || sh_type == elfcpp::SHT_RELA) | |
1252 | { | |
d491d34e | 1253 | unsigned int target_shndx = this->adjust_shndx(shdr.get_sh_info()); |
2ea97941 | 1254 | if (target_shndx == 0 || target_shndx >= shnum) |
730cdc88 ILT |
1255 | { |
1256 | this->error(_("relocation section %u has bad info %u"), | |
1257 | i, target_shndx); | |
1258 | continue; | |
1259 | } | |
1260 | ||
1261 | if (reloc_shndx[target_shndx] != 0) | |
1262 | reloc_shndx[target_shndx] = -1U; | |
1263 | else | |
1264 | { | |
1265 | reloc_shndx[target_shndx] = i; | |
1266 | reloc_type[target_shndx] = sh_type; | |
1267 | } | |
1268 | } | |
1269 | } | |
1270 | ||
ef9beddf | 1271 | Output_sections& out_sections(this->output_sections()); |
6fa2a40b | 1272 | std::vector<Address>& out_section_offsets(this->section_offsets()); |
ef9beddf | 1273 | |
6d03d481 ST |
1274 | if (!is_gc_pass_two) |
1275 | { | |
2ea97941 ILT |
1276 | out_sections.resize(shnum); |
1277 | out_section_offsets.resize(shnum); | |
6d03d481 | 1278 | } |
a2fb1b05 | 1279 | |
88dd47ac ILT |
1280 | // If we are only linking for symbols, then there is nothing else to |
1281 | // do here. | |
1282 | if (this->input_file()->just_symbols()) | |
1283 | { | |
6d03d481 ST |
1284 | if (!is_gc_pass_two) |
1285 | { | |
1286 | delete sd->section_headers; | |
1287 | sd->section_headers = NULL; | |
1288 | delete sd->section_names; | |
1289 | sd->section_names = NULL; | |
1290 | } | |
88dd47ac ILT |
1291 | return; |
1292 | } | |
1293 | ||
5995b570 CC |
1294 | if (num_sections_to_defer > 0) |
1295 | { | |
1296 | parameters->options().plugins()->add_deferred_layout_object(this); | |
1297 | this->deferred_layout_.reserve(num_sections_to_defer); | |
1298 | } | |
1299 | ||
35cdfc9a ILT |
1300 | // Whether we've seen a .note.GNU-stack section. |
1301 | bool seen_gnu_stack = false; | |
1302 | // The flags of a .note.GNU-stack section. | |
1303 | uint64_t gnu_stack_flags = 0; | |
1304 | ||
a2fb1b05 | 1305 | // Keep track of which sections to omit. |
2ea97941 | 1306 | std::vector<bool> omit(shnum, false); |
a2fb1b05 | 1307 | |
7019cd25 | 1308 | // Keep track of reloc sections when emitting relocations. |
8851ecca | 1309 | const bool relocatable = parameters->options().relocatable(); |
2ea97941 ILT |
1310 | const bool emit_relocs = (relocatable |
1311 | || parameters->options().emit_relocs()); | |
6a74a719 ILT |
1312 | std::vector<unsigned int> reloc_sections; |
1313 | ||
730cdc88 ILT |
1314 | // Keep track of .eh_frame sections. |
1315 | std::vector<unsigned int> eh_frame_sections; | |
1316 | ||
f6ce93d6 | 1317 | // Skip the first, dummy, section. |
e94cf127 | 1318 | pshdrs = shdrs + This::shdr_size; |
2ea97941 | 1319 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) |
a2fb1b05 | 1320 | { |
75f65a3e | 1321 | typename This::Shdr shdr(pshdrs); |
a2fb1b05 | 1322 | |
6d03d481 | 1323 | if (shdr.get_sh_name() >= section_names_size) |
a2fb1b05 | 1324 | { |
75f2446e ILT |
1325 | this->error(_("bad section name offset for section %u: %lu"), |
1326 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
1327 | return; | |
a2fb1b05 ILT |
1328 | } |
1329 | ||
2ea97941 | 1330 | const char* name = pnames + shdr.get_sh_name(); |
a2fb1b05 | 1331 | |
6d03d481 ST |
1332 | if (!is_gc_pass_two) |
1333 | { | |
2ea97941 | 1334 | if (this->handle_gnu_warning_section(name, i, symtab)) |
6d03d481 | 1335 | { |
e588ea8d | 1336 | if (!relocatable && !parameters->options().shared()) |
6d03d481 ST |
1337 | omit[i] = true; |
1338 | } | |
f6ce93d6 | 1339 | |
6d03d481 ST |
1340 | // The .note.GNU-stack section is special. It gives the |
1341 | // protection flags that this object file requires for the stack | |
1342 | // in memory. | |
2ea97941 | 1343 | if (strcmp(name, ".note.GNU-stack") == 0) |
6d03d481 ST |
1344 | { |
1345 | seen_gnu_stack = true; | |
1346 | gnu_stack_flags |= shdr.get_sh_flags(); | |
1347 | omit[i] = true; | |
1348 | } | |
35cdfc9a | 1349 | |
364c7fa5 ILT |
1350 | // The .note.GNU-split-stack section is also special. It |
1351 | // indicates that the object was compiled with | |
1352 | // -fsplit-stack. | |
2ea97941 | 1353 | if (this->handle_split_stack_section(name)) |
364c7fa5 | 1354 | { |
e588ea8d | 1355 | if (!relocatable && !parameters->options().shared()) |
364c7fa5 ILT |
1356 | omit[i] = true; |
1357 | } | |
1358 | ||
05a352e6 | 1359 | // Skip attributes section. |
2ea97941 | 1360 | if (parameters->target().is_attributes_section(name)) |
05a352e6 DK |
1361 | { |
1362 | omit[i] = true; | |
1363 | } | |
1364 | ||
6d03d481 ST |
1365 | bool discard = omit[i]; |
1366 | if (!discard) | |
1367 | { | |
1368 | if (shdr.get_sh_type() == elfcpp::SHT_GROUP) | |
1369 | { | |
2ea97941 | 1370 | if (!this->include_section_group(symtab, layout, i, name, |
6d03d481 ST |
1371 | shdrs, pnames, |
1372 | section_names_size, | |
1373 | &omit)) | |
1374 | discard = true; | |
1375 | } | |
1376 | else if ((shdr.get_sh_flags() & elfcpp::SHF_GROUP) == 0 | |
2ea97941 | 1377 | && Layout::is_linkonce(name)) |
6d03d481 | 1378 | { |
2ea97941 | 1379 | if (!this->include_linkonce_section(layout, i, name, shdr)) |
6d03d481 ST |
1380 | discard = true; |
1381 | } | |
a2fb1b05 | 1382 | } |
a2fb1b05 | 1383 | |
09ec0418 CC |
1384 | // Add the section to the incremental inputs layout. |
1385 | Incremental_inputs* incremental_inputs = layout->incremental_inputs(); | |
cdc29364 CC |
1386 | if (incremental_inputs != NULL |
1387 | && !discard | |
aa06ae28 | 1388 | && can_incremental_update(shdr.get_sh_type())) |
4fb3a1c3 CC |
1389 | { |
1390 | off_t sh_size = shdr.get_sh_size(); | |
1391 | section_size_type uncompressed_size; | |
1392 | if (this->section_is_compressed(i, &uncompressed_size)) | |
1393 | sh_size = uncompressed_size; | |
1394 | incremental_inputs->report_input_section(this, i, name, sh_size); | |
1395 | } | |
09ec0418 | 1396 | |
6d03d481 ST |
1397 | if (discard) |
1398 | { | |
1399 | // Do not include this section in the link. | |
1400 | out_sections[i] = NULL; | |
1401 | out_section_offsets[i] = invalid_address; | |
1402 | continue; | |
1403 | } | |
1404 | } | |
1405 | ||
ef15dade | 1406 | if (is_gc_pass_one && parameters->options().gc_sections()) |
6d03d481 | 1407 | { |
cdc29364 | 1408 | if (this->is_section_name_included(name) |
6d03d481 ST |
1409 | || shdr.get_sh_type() == elfcpp::SHT_INIT_ARRAY |
1410 | || shdr.get_sh_type() == elfcpp::SHT_FINI_ARRAY) | |
1411 | { | |
1412 | symtab->gc()->worklist().push(Section_id(this, i)); | |
1413 | } | |
f1ec9ded ST |
1414 | // If the section name XXX can be represented as a C identifier |
1415 | // it cannot be discarded if there are references to | |
1416 | // __start_XXX and __stop_XXX symbols. These need to be | |
1417 | // specially handled. | |
1418 | if (is_cident(name)) | |
1419 | { | |
1420 | symtab->gc()->add_cident_section(name, Section_id(this, i)); | |
1421 | } | |
6d03d481 | 1422 | } |
a2fb1b05 | 1423 | |
6a74a719 ILT |
1424 | // When doing a relocatable link we are going to copy input |
1425 | // reloc sections into the output. We only want to copy the | |
1426 | // ones associated with sections which are not being discarded. | |
1427 | // However, we don't know that yet for all sections. So save | |
6d03d481 ST |
1428 | // reloc sections and process them later. Garbage collection is |
1429 | // not triggered when relocatable code is desired. | |
2ea97941 | 1430 | if (emit_relocs |
6a74a719 ILT |
1431 | && (shdr.get_sh_type() == elfcpp::SHT_REL |
1432 | || shdr.get_sh_type() == elfcpp::SHT_RELA)) | |
1433 | { | |
1434 | reloc_sections.push_back(i); | |
1435 | continue; | |
1436 | } | |
1437 | ||
8851ecca | 1438 | if (relocatable && shdr.get_sh_type() == elfcpp::SHT_GROUP) |
6a74a719 ILT |
1439 | continue; |
1440 | ||
730cdc88 ILT |
1441 | // The .eh_frame section is special. It holds exception frame |
1442 | // information that we need to read in order to generate the | |
1443 | // exception frame header. We process these after all the other | |
1444 | // sections so that the exception frame reader can reliably | |
1445 | // determine which sections are being discarded, and discard the | |
1446 | // corresponding information. | |
8851ecca | 1447 | if (!relocatable |
2ea97941 | 1448 | && strcmp(name, ".eh_frame") == 0 |
6d03d481 ST |
1449 | && this->check_eh_frame_flags(&shdr)) |
1450 | { | |
1451 | if (is_gc_pass_one) | |
1452 | { | |
1453 | out_sections[i] = reinterpret_cast<Output_section*>(1); | |
1454 | out_section_offsets[i] = invalid_address; | |
1455 | } | |
14788a3f ILT |
1456 | else if (should_defer_layout) |
1457 | this->deferred_layout_.push_back(Deferred_layout(i, name, | |
1458 | pshdrs, | |
1459 | reloc_shndx[i], | |
1460 | reloc_type[i])); | |
1461 | else | |
6d03d481 ST |
1462 | eh_frame_sections.push_back(i); |
1463 | continue; | |
1464 | } | |
730cdc88 | 1465 | |
ef15dade | 1466 | if (is_gc_pass_two && parameters->options().gc_sections()) |
6d03d481 ST |
1467 | { |
1468 | // This is executed during the second pass of garbage | |
1469 | // collection. do_layout has been called before and some | |
1470 | // sections have been already discarded. Simply ignore | |
1471 | // such sections this time around. | |
1472 | if (out_sections[i] == NULL) | |
1473 | { | |
1474 | gold_assert(out_section_offsets[i] == invalid_address); | |
1475 | continue; | |
1476 | } | |
ef15dade ST |
1477 | if (((shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) |
1478 | && symtab->gc()->is_section_garbage(this, i)) | |
6d03d481 ST |
1479 | { |
1480 | if (parameters->options().print_gc_sections()) | |
89dd1680 | 1481 | gold_info(_("%s: removing unused section from '%s'" |
ef15dade | 1482 | " in file '%s'"), |
6d03d481 ST |
1483 | program_name, this->section_name(i).c_str(), |
1484 | this->name().c_str()); | |
1485 | out_sections[i] = NULL; | |
1486 | out_section_offsets[i] = invalid_address; | |
1487 | continue; | |
1488 | } | |
1489 | } | |
ef15dade | 1490 | |
032ce4e9 | 1491 | if (is_gc_pass_two && parameters->options().icf_enabled()) |
ef15dade ST |
1492 | { |
1493 | if (out_sections[i] == NULL) | |
1494 | { | |
1495 | gold_assert(out_section_offsets[i] == invalid_address); | |
1496 | continue; | |
1497 | } | |
1498 | if (((shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) | |
1499 | && symtab->icf()->is_section_folded(this, i)) | |
1500 | { | |
1501 | if (parameters->options().print_icf_sections()) | |
1502 | { | |
1503 | Section_id folded = | |
1504 | symtab->icf()->get_folded_section(this, i); | |
1505 | Relobj* folded_obj = | |
1506 | reinterpret_cast<Relobj*>(folded.first); | |
1507 | gold_info(_("%s: ICF folding section '%s' in file '%s'" | |
1508 | "into '%s' in file '%s'"), | |
1509 | program_name, this->section_name(i).c_str(), | |
1510 | this->name().c_str(), | |
1511 | folded_obj->section_name(folded.second).c_str(), | |
1512 | folded_obj->name().c_str()); | |
1513 | } | |
1514 | out_sections[i] = NULL; | |
1515 | out_section_offsets[i] = invalid_address; | |
1516 | continue; | |
1517 | } | |
1518 | } | |
1519 | ||
6d03d481 ST |
1520 | // Defer layout here if input files are claimed by plugins. When gc |
1521 | // is turned on this function is called twice. For the second call | |
1522 | // should_defer_layout should be false. | |
5995b570 CC |
1523 | if (should_defer_layout && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC)) |
1524 | { | |
6d03d481 | 1525 | gold_assert(!is_gc_pass_two); |
2ea97941 | 1526 | this->deferred_layout_.push_back(Deferred_layout(i, name, |
6d03d481 | 1527 | pshdrs, |
5995b570 CC |
1528 | reloc_shndx[i], |
1529 | reloc_type[i])); | |
5995b570 CC |
1530 | // Put dummy values here; real values will be supplied by |
1531 | // do_layout_deferred_sections. | |
6d03d481 ST |
1532 | out_sections[i] = reinterpret_cast<Output_section*>(2); |
1533 | out_section_offsets[i] = invalid_address; | |
1534 | continue; | |
ef15dade ST |
1535 | } |
1536 | ||
6d03d481 ST |
1537 | // During gc_pass_two if a section that was previously deferred is |
1538 | // found, do not layout the section as layout_deferred_sections will | |
1539 | // do it later from gold.cc. | |
1540 | if (is_gc_pass_two | |
1541 | && (out_sections[i] == reinterpret_cast<Output_section*>(2))) | |
1542 | continue; | |
1543 | ||
1544 | if (is_gc_pass_one) | |
1545 | { | |
1546 | // This is during garbage collection. The out_sections are | |
1547 | // assigned in the second call to this function. | |
5995b570 CC |
1548 | out_sections[i] = reinterpret_cast<Output_section*>(1); |
1549 | out_section_offsets[i] = invalid_address; | |
1550 | } | |
ef9beddf | 1551 | else |
5995b570 | 1552 | { |
6d03d481 ST |
1553 | // When garbage collection is switched on the actual layout |
1554 | // only happens in the second call. | |
2ea97941 | 1555 | this->layout_section(layout, i, name, shdr, reloc_shndx[i], |
5995b570 CC |
1556 | reloc_type[i]); |
1557 | } | |
12e14209 ILT |
1558 | } |
1559 | ||
459e9b03 | 1560 | if (!is_gc_pass_two) |
83e17bd5 | 1561 | layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags, this); |
35cdfc9a | 1562 | |
6a74a719 | 1563 | // When doing a relocatable link handle the reloc sections at the |
ef15dade ST |
1564 | // end. Garbage collection and Identical Code Folding is not |
1565 | // turned on for relocatable code. | |
2ea97941 | 1566 | if (emit_relocs) |
6a74a719 | 1567 | this->size_relocatable_relocs(); |
ef15dade ST |
1568 | |
1569 | gold_assert(!(is_gc_or_icf) || reloc_sections.empty()); | |
1570 | ||
6a74a719 ILT |
1571 | for (std::vector<unsigned int>::const_iterator p = reloc_sections.begin(); |
1572 | p != reloc_sections.end(); | |
1573 | ++p) | |
1574 | { | |
1575 | unsigned int i = *p; | |
1576 | const unsigned char* pshdr; | |
6d03d481 | 1577 | pshdr = section_headers_data + i * This::shdr_size; |
6a74a719 ILT |
1578 | typename This::Shdr shdr(pshdr); |
1579 | ||
d491d34e | 1580 | unsigned int data_shndx = this->adjust_shndx(shdr.get_sh_info()); |
2ea97941 | 1581 | if (data_shndx >= shnum) |
6a74a719 ILT |
1582 | { |
1583 | // We already warned about this above. | |
1584 | continue; | |
1585 | } | |
1586 | ||
ef9beddf | 1587 | Output_section* data_section = out_sections[data_shndx]; |
f3a2388f CC |
1588 | if (data_section == reinterpret_cast<Output_section*>(2)) |
1589 | { | |
1590 | // The layout for the data section was deferred, so we need | |
1591 | // to defer the relocation section, too. | |
1592 | const char* name = pnames + shdr.get_sh_name(); | |
1593 | this->deferred_layout_relocs_.push_back( | |
1594 | Deferred_layout(i, name, pshdr, 0, elfcpp::SHT_NULL)); | |
1595 | out_sections[i] = reinterpret_cast<Output_section*>(2); | |
1596 | out_section_offsets[i] = invalid_address; | |
1597 | continue; | |
1598 | } | |
6a74a719 ILT |
1599 | if (data_section == NULL) |
1600 | { | |
ef9beddf | 1601 | out_sections[i] = NULL; |
eff45813 | 1602 | out_section_offsets[i] = invalid_address; |
6a74a719 ILT |
1603 | continue; |
1604 | } | |
1605 | ||
1606 | Relocatable_relocs* rr = new Relocatable_relocs(); | |
1607 | this->set_relocatable_relocs(i, rr); | |
1608 | ||
2ea97941 ILT |
1609 | Output_section* os = layout->layout_reloc(this, i, shdr, data_section, |
1610 | rr); | |
ef9beddf | 1611 | out_sections[i] = os; |
eff45813 | 1612 | out_section_offsets[i] = invalid_address; |
6a74a719 ILT |
1613 | } |
1614 | ||
730cdc88 | 1615 | // Handle the .eh_frame sections at the end. |
6d03d481 | 1616 | gold_assert(!is_gc_pass_one || eh_frame_sections.empty()); |
730cdc88 ILT |
1617 | for (std::vector<unsigned int>::const_iterator p = eh_frame_sections.begin(); |
1618 | p != eh_frame_sections.end(); | |
1619 | ++p) | |
1620 | { | |
730cdc88 | 1621 | unsigned int i = *p; |
ca09d69a | 1622 | const unsigned char* pshdr; |
6d03d481 | 1623 | pshdr = section_headers_data + i * This::shdr_size; |
730cdc88 ILT |
1624 | typename This::Shdr shdr(pshdr); |
1625 | ||
14788a3f ILT |
1626 | this->layout_eh_frame_section(layout, |
1627 | symbols_data, | |
1628 | symbols_size, | |
1629 | symbol_names_data, | |
1630 | symbol_names_size, | |
1631 | i, | |
1632 | shdr, | |
1633 | reloc_shndx[i], | |
1634 | reloc_type[i]); | |
730cdc88 ILT |
1635 | } |
1636 | ||
6d03d481 ST |
1637 | if (is_gc_pass_two) |
1638 | { | |
1639 | delete[] gc_sd->section_headers_data; | |
1640 | delete[] gc_sd->section_names_data; | |
1641 | delete[] gc_sd->symbols_data; | |
1642 | delete[] gc_sd->symbol_names_data; | |
ef15dade | 1643 | this->set_symbols_data(NULL); |
6d03d481 ST |
1644 | } |
1645 | else | |
1646 | { | |
1647 | delete sd->section_headers; | |
1648 | sd->section_headers = NULL; | |
1649 | delete sd->section_names; | |
1650 | sd->section_names = NULL; | |
1651 | } | |
12e14209 ILT |
1652 | } |
1653 | ||
5995b570 CC |
1654 | // Layout sections whose layout was deferred while waiting for |
1655 | // input files from a plugin. | |
1656 | ||
1657 | template<int size, bool big_endian> | |
1658 | void | |
6fa2a40b | 1659 | Sized_relobj_file<size, big_endian>::do_layout_deferred_sections(Layout* layout) |
5995b570 CC |
1660 | { |
1661 | typename std::vector<Deferred_layout>::iterator deferred; | |
1662 | ||
1663 | for (deferred = this->deferred_layout_.begin(); | |
1664 | deferred != this->deferred_layout_.end(); | |
1665 | ++deferred) | |
1666 | { | |
1667 | typename This::Shdr shdr(deferred->shdr_data_); | |
5e0f337e RÁE |
1668 | // If the section is not included, it is because the garbage collector |
1669 | // decided it is not needed. Avoid reverting that decision. | |
1670 | if (!this->is_section_included(deferred->shndx_)) | |
1671 | continue; | |
1672 | ||
14788a3f ILT |
1673 | if (parameters->options().relocatable() |
1674 | || deferred->name_ != ".eh_frame" | |
1675 | || !this->check_eh_frame_flags(&shdr)) | |
1676 | this->layout_section(layout, deferred->shndx_, deferred->name_.c_str(), | |
1677 | shdr, deferred->reloc_shndx_, | |
1678 | deferred->reloc_type_); | |
1679 | else | |
1680 | { | |
1681 | // Reading the symbols again here may be slow. | |
1682 | Read_symbols_data sd; | |
1683 | this->read_symbols(&sd); | |
1684 | this->layout_eh_frame_section(layout, | |
1685 | sd.symbols->data(), | |
1686 | sd.symbols_size, | |
1687 | sd.symbol_names->data(), | |
1688 | sd.symbol_names_size, | |
1689 | deferred->shndx_, | |
1690 | shdr, | |
1691 | deferred->reloc_shndx_, | |
1692 | deferred->reloc_type_); | |
1693 | } | |
5995b570 CC |
1694 | } |
1695 | ||
1696 | this->deferred_layout_.clear(); | |
f3a2388f CC |
1697 | |
1698 | // Now handle the deferred relocation sections. | |
1699 | ||
1700 | Output_sections& out_sections(this->output_sections()); | |
6fa2a40b | 1701 | std::vector<Address>& out_section_offsets(this->section_offsets()); |
f3a2388f CC |
1702 | |
1703 | for (deferred = this->deferred_layout_relocs_.begin(); | |
1704 | deferred != this->deferred_layout_relocs_.end(); | |
1705 | ++deferred) | |
1706 | { | |
1707 | unsigned int shndx = deferred->shndx_; | |
1708 | typename This::Shdr shdr(deferred->shdr_data_); | |
1709 | unsigned int data_shndx = this->adjust_shndx(shdr.get_sh_info()); | |
1710 | ||
1711 | Output_section* data_section = out_sections[data_shndx]; | |
1712 | if (data_section == NULL) | |
1713 | { | |
1714 | out_sections[shndx] = NULL; | |
1715 | out_section_offsets[shndx] = invalid_address; | |
1716 | continue; | |
1717 | } | |
1718 | ||
1719 | Relocatable_relocs* rr = new Relocatable_relocs(); | |
1720 | this->set_relocatable_relocs(shndx, rr); | |
1721 | ||
1722 | Output_section* os = layout->layout_reloc(this, shndx, shdr, | |
1723 | data_section, rr); | |
1724 | out_sections[shndx] = os; | |
1725 | out_section_offsets[shndx] = invalid_address; | |
1726 | } | |
5995b570 CC |
1727 | } |
1728 | ||
12e14209 ILT |
1729 | // Add the symbols to the symbol table. |
1730 | ||
1731 | template<int size, bool big_endian> | |
1732 | void | |
6fa2a40b CC |
1733 | Sized_relobj_file<size, big_endian>::do_add_symbols(Symbol_table* symtab, |
1734 | Read_symbols_data* sd, | |
1735 | Layout*) | |
12e14209 ILT |
1736 | { |
1737 | if (sd->symbols == NULL) | |
1738 | { | |
a3ad94ed | 1739 | gold_assert(sd->symbol_names == NULL); |
12e14209 ILT |
1740 | return; |
1741 | } | |
a2fb1b05 | 1742 | |
2ea97941 | 1743 | const int sym_size = This::sym_size; |
730cdc88 | 1744 | size_t symcount = ((sd->symbols_size - sd->external_symbols_offset) |
2ea97941 ILT |
1745 | / sym_size); |
1746 | if (symcount * sym_size != sd->symbols_size - sd->external_symbols_offset) | |
12e14209 | 1747 | { |
75f2446e ILT |
1748 | this->error(_("size of symbols is not multiple of symbol size")); |
1749 | return; | |
a2fb1b05 | 1750 | } |
12e14209 | 1751 | |
730cdc88 | 1752 | this->symbols_.resize(symcount); |
12e14209 | 1753 | |
12e14209 ILT |
1754 | const char* sym_names = |
1755 | reinterpret_cast<const char*>(sd->symbol_names->data()); | |
730cdc88 ILT |
1756 | symtab->add_from_relobj(this, |
1757 | sd->symbols->data() + sd->external_symbols_offset, | |
7fcd3aa9 | 1758 | symcount, this->local_symbol_count_, |
d491d34e | 1759 | sym_names, sd->symbol_names_size, |
92de84a6 ILT |
1760 | &this->symbols_, |
1761 | &this->defined_count_); | |
12e14209 ILT |
1762 | |
1763 | delete sd->symbols; | |
1764 | sd->symbols = NULL; | |
1765 | delete sd->symbol_names; | |
1766 | sd->symbol_names = NULL; | |
bae7f79e ILT |
1767 | } |
1768 | ||
b0193076 RÁE |
1769 | // Find out if this object, that is a member of a lib group, should be included |
1770 | // in the link. We check every symbol defined by this object. If the symbol | |
1771 | // table has a strong undefined reference to that symbol, we have to include | |
1772 | // the object. | |
1773 | ||
1774 | template<int size, bool big_endian> | |
1775 | Archive::Should_include | |
6fa2a40b CC |
1776 | Sized_relobj_file<size, big_endian>::do_should_include_member( |
1777 | Symbol_table* symtab, | |
1778 | Layout* layout, | |
1779 | Read_symbols_data* sd, | |
1780 | std::string* why) | |
b0193076 RÁE |
1781 | { |
1782 | char* tmpbuf = NULL; | |
1783 | size_t tmpbuflen = 0; | |
1784 | const char* sym_names = | |
1785 | reinterpret_cast<const char*>(sd->symbol_names->data()); | |
1786 | const unsigned char* syms = | |
1787 | sd->symbols->data() + sd->external_symbols_offset; | |
1788 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1789 | size_t symcount = ((sd->symbols_size - sd->external_symbols_offset) | |
1790 | / sym_size); | |
1791 | ||
1792 | const unsigned char* p = syms; | |
1793 | ||
1794 | for (size_t i = 0; i < symcount; ++i, p += sym_size) | |
1795 | { | |
1796 | elfcpp::Sym<size, big_endian> sym(p); | |
1797 | unsigned int st_shndx = sym.get_st_shndx(); | |
1798 | if (st_shndx == elfcpp::SHN_UNDEF) | |
1799 | continue; | |
1800 | ||
1801 | unsigned int st_name = sym.get_st_name(); | |
1802 | const char* name = sym_names + st_name; | |
1803 | Symbol* symbol; | |
88a4108b ILT |
1804 | Archive::Should_include t = Archive::should_include_member(symtab, |
1805 | layout, | |
1806 | name, | |
b0193076 RÁE |
1807 | &symbol, why, |
1808 | &tmpbuf, | |
1809 | &tmpbuflen); | |
1810 | if (t == Archive::SHOULD_INCLUDE_YES) | |
1811 | { | |
1812 | if (tmpbuf != NULL) | |
1813 | free(tmpbuf); | |
1814 | return t; | |
1815 | } | |
1816 | } | |
1817 | if (tmpbuf != NULL) | |
1818 | free(tmpbuf); | |
1819 | return Archive::SHOULD_INCLUDE_UNKNOWN; | |
1820 | } | |
1821 | ||
e0c52780 CC |
1822 | // Iterate over global defined symbols, calling a visitor class V for each. |
1823 | ||
1824 | template<int size, bool big_endian> | |
1825 | void | |
6fa2a40b | 1826 | Sized_relobj_file<size, big_endian>::do_for_all_global_symbols( |
e0c52780 CC |
1827 | Read_symbols_data* sd, |
1828 | Library_base::Symbol_visitor_base* v) | |
1829 | { | |
1830 | const char* sym_names = | |
1831 | reinterpret_cast<const char*>(sd->symbol_names->data()); | |
1832 | const unsigned char* syms = | |
1833 | sd->symbols->data() + sd->external_symbols_offset; | |
1834 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1835 | size_t symcount = ((sd->symbols_size - sd->external_symbols_offset) | |
1836 | / sym_size); | |
1837 | const unsigned char* p = syms; | |
1838 | ||
1839 | for (size_t i = 0; i < symcount; ++i, p += sym_size) | |
1840 | { | |
1841 | elfcpp::Sym<size, big_endian> sym(p); | |
1842 | if (sym.get_st_shndx() != elfcpp::SHN_UNDEF) | |
1843 | v->visit(sym_names + sym.get_st_name()); | |
1844 | } | |
1845 | } | |
1846 | ||
7223e9ca ILT |
1847 | // Return whether the local symbol SYMNDX has a PLT offset. |
1848 | ||
1849 | template<int size, bool big_endian> | |
1850 | bool | |
6fa2a40b CC |
1851 | Sized_relobj_file<size, big_endian>::local_has_plt_offset( |
1852 | unsigned int symndx) const | |
7223e9ca ILT |
1853 | { |
1854 | typename Local_plt_offsets::const_iterator p = | |
1855 | this->local_plt_offsets_.find(symndx); | |
1856 | return p != this->local_plt_offsets_.end(); | |
1857 | } | |
1858 | ||
1859 | // Get the PLT offset of a local symbol. | |
1860 | ||
1861 | template<int size, bool big_endian> | |
1862 | unsigned int | |
83896202 ILT |
1863 | Sized_relobj_file<size, big_endian>::do_local_plt_offset( |
1864 | unsigned int symndx) const | |
7223e9ca ILT |
1865 | { |
1866 | typename Local_plt_offsets::const_iterator p = | |
1867 | this->local_plt_offsets_.find(symndx); | |
1868 | gold_assert(p != this->local_plt_offsets_.end()); | |
1869 | return p->second; | |
1870 | } | |
1871 | ||
1872 | // Set the PLT offset of a local symbol. | |
1873 | ||
1874 | template<int size, bool big_endian> | |
1875 | void | |
6fa2a40b CC |
1876 | Sized_relobj_file<size, big_endian>::set_local_plt_offset( |
1877 | unsigned int symndx, unsigned int plt_offset) | |
7223e9ca ILT |
1878 | { |
1879 | std::pair<typename Local_plt_offsets::iterator, bool> ins = | |
1880 | this->local_plt_offsets_.insert(std::make_pair(symndx, plt_offset)); | |
1881 | gold_assert(ins.second); | |
1882 | } | |
1883 | ||
cb295612 ILT |
1884 | // First pass over the local symbols. Here we add their names to |
1885 | // *POOL and *DYNPOOL, and we store the symbol value in | |
1886 | // THIS->LOCAL_VALUES_. This function is always called from a | |
1887 | // singleton thread. This is followed by a call to | |
1888 | // finalize_local_symbols. | |
75f65a3e ILT |
1889 | |
1890 | template<int size, bool big_endian> | |
7bf1f802 | 1891 | void |
6fa2a40b CC |
1892 | Sized_relobj_file<size, big_endian>::do_count_local_symbols(Stringpool* pool, |
1893 | Stringpool* dynpool) | |
75f65a3e | 1894 | { |
a3ad94ed | 1895 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 1896 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
1897 | { |
1898 | // This object has no symbols. Weird but legal. | |
7bf1f802 | 1899 | return; |
61ba1cf9 ILT |
1900 | } |
1901 | ||
75f65a3e | 1902 | // Read the symbol table section header. |
2ea97941 | 1903 | const unsigned int symtab_shndx = this->symtab_shndx_; |
645f8123 | 1904 | typename This::Shdr symtabshdr(this, |
2ea97941 | 1905 | this->elf_file_.section_header(symtab_shndx)); |
a3ad94ed | 1906 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
75f65a3e ILT |
1907 | |
1908 | // Read the local symbols. | |
2ea97941 | 1909 | const int sym_size = This::sym_size; |
92e059d8 | 1910 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 1911 | gold_assert(loccount == symtabshdr.get_sh_info()); |
2ea97941 | 1912 | off_t locsize = loccount * sym_size; |
75f65a3e | 1913 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), |
39d0cb0e | 1914 | locsize, true, true); |
75f65a3e | 1915 | |
75f65a3e | 1916 | // Read the symbol names. |
d491d34e ILT |
1917 | const unsigned int strtab_shndx = |
1918 | this->adjust_shndx(symtabshdr.get_sh_link()); | |
8383303e | 1919 | section_size_type strtab_size; |
645f8123 | 1920 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, |
9eb9fa57 ILT |
1921 | &strtab_size, |
1922 | true); | |
75f65a3e ILT |
1923 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
1924 | ||
1925 | // Loop over the local symbols. | |
1926 | ||
ef9beddf | 1927 | const Output_sections& out_sections(this->output_sections()); |
2ea97941 | 1928 | unsigned int shnum = this->shnum(); |
61ba1cf9 | 1929 | unsigned int count = 0; |
7bf1f802 | 1930 | unsigned int dyncount = 0; |
75f65a3e | 1931 | // Skip the first, dummy, symbol. |
2ea97941 | 1932 | psyms += sym_size; |
403676b5 | 1933 | bool strip_all = parameters->options().strip_all(); |
ebcc8304 | 1934 | bool discard_all = parameters->options().discard_all(); |
bb04269c | 1935 | bool discard_locals = parameters->options().discard_locals(); |
2ea97941 | 1936 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
75f65a3e ILT |
1937 | { |
1938 | elfcpp::Sym<size, big_endian> sym(psyms); | |
1939 | ||
b8e6aad9 ILT |
1940 | Symbol_value<size>& lv(this->local_values_[i]); |
1941 | ||
d491d34e ILT |
1942 | bool is_ordinary; |
1943 | unsigned int shndx = this->adjust_sym_shndx(i, sym.get_st_shndx(), | |
1944 | &is_ordinary); | |
1945 | lv.set_input_shndx(shndx, is_ordinary); | |
75f65a3e | 1946 | |
063f12a8 ILT |
1947 | if (sym.get_st_type() == elfcpp::STT_SECTION) |
1948 | lv.set_is_section_symbol(); | |
7bf1f802 ILT |
1949 | else if (sym.get_st_type() == elfcpp::STT_TLS) |
1950 | lv.set_is_tls_symbol(); | |
7223e9ca ILT |
1951 | else if (sym.get_st_type() == elfcpp::STT_GNU_IFUNC) |
1952 | lv.set_is_ifunc_symbol(); | |
7bf1f802 ILT |
1953 | |
1954 | // Save the input symbol value for use in do_finalize_local_symbols(). | |
1955 | lv.set_input_value(sym.get_st_value()); | |
1956 | ||
1957 | // Decide whether this symbol should go into the output file. | |
063f12a8 | 1958 | |
2ea97941 | 1959 | if ((shndx < shnum && out_sections[shndx] == NULL) |
ebcc8304 | 1960 | || shndx == this->discarded_eh_frame_shndx_) |
7bf1f802 ILT |
1961 | { |
1962 | lv.set_no_output_symtab_entry(); | |
dceae3c1 | 1963 | gold_assert(!lv.needs_output_dynsym_entry()); |
7bf1f802 ILT |
1964 | continue; |
1965 | } | |
1966 | ||
1967 | if (sym.get_st_type() == elfcpp::STT_SECTION) | |
1968 | { | |
1969 | lv.set_no_output_symtab_entry(); | |
dceae3c1 | 1970 | gold_assert(!lv.needs_output_dynsym_entry()); |
7bf1f802 ILT |
1971 | continue; |
1972 | } | |
1973 | ||
1974 | if (sym.get_st_name() >= strtab_size) | |
1975 | { | |
1976 | this->error(_("local symbol %u section name out of range: %u >= %u"), | |
1977 | i, sym.get_st_name(), | |
1978 | static_cast<unsigned int>(strtab_size)); | |
1979 | lv.set_no_output_symtab_entry(); | |
1980 | continue; | |
1981 | } | |
1982 | ||
ebcc8304 ILT |
1983 | const char* name = pnames + sym.get_st_name(); |
1984 | ||
1985 | // If needed, add the symbol to the dynamic symbol table string pool. | |
1986 | if (lv.needs_output_dynsym_entry()) | |
1987 | { | |
1988 | dynpool->add(name, true, NULL); | |
1989 | ++dyncount; | |
1990 | } | |
1991 | ||
403676b5 CC |
1992 | if (strip_all |
1993 | || (discard_all && lv.may_be_discarded_from_output_symtab())) | |
ebcc8304 ILT |
1994 | { |
1995 | lv.set_no_output_symtab_entry(); | |
1996 | continue; | |
1997 | } | |
1998 | ||
bb04269c DK |
1999 | // If --discard-locals option is used, discard all temporary local |
2000 | // symbols. These symbols start with system-specific local label | |
2001 | // prefixes, typically .L for ELF system. We want to be compatible | |
2002 | // with GNU ld so here we essentially use the same check in | |
2003 | // bfd_is_local_label(). The code is different because we already | |
2004 | // know that: | |
2005 | // | |
2006 | // - the symbol is local and thus cannot have global or weak binding. | |
2007 | // - the symbol is not a section symbol. | |
2008 | // - the symbol has a name. | |
2009 | // | |
2010 | // We do not discard a symbol if it needs a dynamic symbol entry. | |
bb04269c DK |
2011 | if (discard_locals |
2012 | && sym.get_st_type() != elfcpp::STT_FILE | |
2013 | && !lv.needs_output_dynsym_entry() | |
d3bbad62 | 2014 | && lv.may_be_discarded_from_output_symtab() |
2ea97941 | 2015 | && parameters->target().is_local_label_name(name)) |
bb04269c DK |
2016 | { |
2017 | lv.set_no_output_symtab_entry(); | |
2018 | continue; | |
2019 | } | |
2020 | ||
8c604651 CS |
2021 | // Discard the local symbol if -retain_symbols_file is specified |
2022 | // and the local symbol is not in that file. | |
2ea97941 | 2023 | if (!parameters->options().should_retain_symbol(name)) |
8c604651 CS |
2024 | { |
2025 | lv.set_no_output_symtab_entry(); | |
2026 | continue; | |
2027 | } | |
2028 | ||
bb04269c | 2029 | // Add the symbol to the symbol table string pool. |
2ea97941 | 2030 | pool->add(name, true, NULL); |
7bf1f802 | 2031 | ++count; |
7bf1f802 ILT |
2032 | } |
2033 | ||
2034 | this->output_local_symbol_count_ = count; | |
2035 | this->output_local_dynsym_count_ = dyncount; | |
2036 | } | |
2037 | ||
aa98ff75 DK |
2038 | // Compute the final value of a local symbol. |
2039 | ||
2040 | template<int size, bool big_endian> | |
6fa2a40b CC |
2041 | typename Sized_relobj_file<size, big_endian>::Compute_final_local_value_status |
2042 | Sized_relobj_file<size, big_endian>::compute_final_local_value_internal( | |
aa98ff75 DK |
2043 | unsigned int r_sym, |
2044 | const Symbol_value<size>* lv_in, | |
2045 | Symbol_value<size>* lv_out, | |
2046 | bool relocatable, | |
2047 | const Output_sections& out_sections, | |
2048 | const std::vector<Address>& out_offsets, | |
2049 | const Symbol_table* symtab) | |
2050 | { | |
2051 | // We are going to overwrite *LV_OUT, if it has a merged symbol value, | |
2052 | // we may have a memory leak. | |
2053 | gold_assert(lv_out->has_output_value()); | |
2054 | ||
2055 | bool is_ordinary; | |
2056 | unsigned int shndx = lv_in->input_shndx(&is_ordinary); | |
2057 | ||
2058 | // Set the output symbol value. | |
2059 | ||
2060 | if (!is_ordinary) | |
2061 | { | |
2062 | if (shndx == elfcpp::SHN_ABS || Symbol::is_common_shndx(shndx)) | |
2063 | lv_out->set_output_value(lv_in->input_value()); | |
2064 | else | |
2065 | { | |
2066 | this->error(_("unknown section index %u for local symbol %u"), | |
2067 | shndx, r_sym); | |
2068 | lv_out->set_output_value(0); | |
2069 | return This::CFLV_ERROR; | |
2070 | } | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | if (shndx >= this->shnum()) | |
2075 | { | |
2076 | this->error(_("local symbol %u section index %u out of range"), | |
2077 | r_sym, shndx); | |
2078 | lv_out->set_output_value(0); | |
2079 | return This::CFLV_ERROR; | |
2080 | } | |
2081 | ||
2082 | Output_section* os = out_sections[shndx]; | |
2083 | Address secoffset = out_offsets[shndx]; | |
2084 | if (symtab->is_section_folded(this, shndx)) | |
2085 | { | |
2086 | gold_assert(os == NULL && secoffset == invalid_address); | |
2087 | // Get the os of the section it is folded onto. | |
2088 | Section_id folded = symtab->icf()->get_folded_section(this, | |
2089 | shndx); | |
2090 | gold_assert(folded.first != NULL); | |
6fa2a40b CC |
2091 | Sized_relobj_file<size, big_endian>* folded_obj = reinterpret_cast |
2092 | <Sized_relobj_file<size, big_endian>*>(folded.first); | |
aa98ff75 DK |
2093 | os = folded_obj->output_section(folded.second); |
2094 | gold_assert(os != NULL); | |
2095 | secoffset = folded_obj->get_output_section_offset(folded.second); | |
2096 | ||
2097 | // This could be a relaxed input section. | |
2098 | if (secoffset == invalid_address) | |
2099 | { | |
2100 | const Output_relaxed_input_section* relaxed_section = | |
2101 | os->find_relaxed_input_section(folded_obj, folded.second); | |
2102 | gold_assert(relaxed_section != NULL); | |
2103 | secoffset = relaxed_section->address() - os->address(); | |
2104 | } | |
2105 | } | |
2106 | ||
2107 | if (os == NULL) | |
2108 | { | |
2109 | // This local symbol belongs to a section we are discarding. | |
2110 | // In some cases when applying relocations later, we will | |
2111 | // attempt to match it to the corresponding kept section, | |
2112 | // so we leave the input value unchanged here. | |
2113 | return This::CFLV_DISCARDED; | |
2114 | } | |
2115 | else if (secoffset == invalid_address) | |
2116 | { | |
2117 | uint64_t start; | |
2118 | ||
2119 | // This is a SHF_MERGE section or one which otherwise | |
2120 | // requires special handling. | |
2121 | if (shndx == this->discarded_eh_frame_shndx_) | |
2122 | { | |
2123 | // This local symbol belongs to a discarded .eh_frame | |
2124 | // section. Just treat it like the case in which | |
2125 | // os == NULL above. | |
2126 | gold_assert(this->has_eh_frame_); | |
2127 | return This::CFLV_DISCARDED; | |
2128 | } | |
2129 | else if (!lv_in->is_section_symbol()) | |
2130 | { | |
2131 | // This is not a section symbol. We can determine | |
2132 | // the final value now. | |
2133 | lv_out->set_output_value( | |
2134 | os->output_address(this, shndx, lv_in->input_value())); | |
2135 | } | |
2136 | else if (!os->find_starting_output_address(this, shndx, &start)) | |
2137 | { | |
2138 | // This is a section symbol, but apparently not one in a | |
2139 | // merged section. First check to see if this is a relaxed | |
2140 | // input section. If so, use its address. Otherwise just | |
2141 | // use the start of the output section. This happens with | |
2142 | // relocatable links when the input object has section | |
2143 | // symbols for arbitrary non-merge sections. | |
2144 | const Output_section_data* posd = | |
2145 | os->find_relaxed_input_section(this, shndx); | |
2146 | if (posd != NULL) | |
2147 | { | |
2148 | Address relocatable_link_adjustment = | |
2149 | relocatable ? os->address() : 0; | |
2150 | lv_out->set_output_value(posd->address() | |
2151 | - relocatable_link_adjustment); | |
2152 | } | |
2153 | else | |
2154 | lv_out->set_output_value(os->address()); | |
2155 | } | |
2156 | else | |
2157 | { | |
2158 | // We have to consider the addend to determine the | |
2159 | // value to use in a relocation. START is the start | |
2160 | // of this input section. If we are doing a relocatable | |
2161 | // link, use offset from start output section instead of | |
2162 | // address. | |
2163 | Address adjusted_start = | |
2164 | relocatable ? start - os->address() : start; | |
2165 | Merged_symbol_value<size>* msv = | |
2166 | new Merged_symbol_value<size>(lv_in->input_value(), | |
2167 | adjusted_start); | |
2168 | lv_out->set_merged_symbol_value(msv); | |
2169 | } | |
2170 | } | |
2171 | else if (lv_in->is_tls_symbol()) | |
2172 | lv_out->set_output_value(os->tls_offset() | |
2173 | + secoffset | |
2174 | + lv_in->input_value()); | |
2175 | else | |
2176 | lv_out->set_output_value((relocatable ? 0 : os->address()) | |
2177 | + secoffset | |
2178 | + lv_in->input_value()); | |
2179 | } | |
2180 | return This::CFLV_OK; | |
2181 | } | |
2182 | ||
2183 | // Compute final local symbol value. R_SYM is the index of a local | |
2184 | // symbol in symbol table. LV points to a symbol value, which is | |
2185 | // expected to hold the input value and to be over-written by the | |
2186 | // final value. SYMTAB points to a symbol table. Some targets may want | |
2187 | // to know would-be-finalized local symbol values in relaxation. | |
2188 | // Hence we provide this method. Since this method updates *LV, a | |
2189 | // callee should make a copy of the original local symbol value and | |
2190 | // use the copy instead of modifying an object's local symbols before | |
2191 | // everything is finalized. The caller should also free up any allocated | |
2192 | // memory in the return value in *LV. | |
2193 | template<int size, bool big_endian> | |
6fa2a40b CC |
2194 | typename Sized_relobj_file<size, big_endian>::Compute_final_local_value_status |
2195 | Sized_relobj_file<size, big_endian>::compute_final_local_value( | |
aa98ff75 DK |
2196 | unsigned int r_sym, |
2197 | const Symbol_value<size>* lv_in, | |
2198 | Symbol_value<size>* lv_out, | |
2199 | const Symbol_table* symtab) | |
2200 | { | |
2201 | // This is just a wrapper of compute_final_local_value_internal. | |
2202 | const bool relocatable = parameters->options().relocatable(); | |
2203 | const Output_sections& out_sections(this->output_sections()); | |
6fa2a40b | 2204 | const std::vector<Address>& out_offsets(this->section_offsets()); |
aa98ff75 DK |
2205 | return this->compute_final_local_value_internal(r_sym, lv_in, lv_out, |
2206 | relocatable, out_sections, | |
2207 | out_offsets, symtab); | |
2208 | } | |
2209 | ||
cb295612 | 2210 | // Finalize the local symbols. Here we set the final value in |
7bf1f802 | 2211 | // THIS->LOCAL_VALUES_ and set their output symbol table indexes. |
17a1d0a9 | 2212 | // This function is always called from a singleton thread. The actual |
7bf1f802 ILT |
2213 | // output of the local symbols will occur in a separate task. |
2214 | ||
2215 | template<int size, bool big_endian> | |
2216 | unsigned int | |
6fa2a40b CC |
2217 | Sized_relobj_file<size, big_endian>::do_finalize_local_symbols( |
2218 | unsigned int index, | |
2219 | off_t off, | |
2220 | Symbol_table* symtab) | |
7bf1f802 ILT |
2221 | { |
2222 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); | |
2223 | ||
2224 | const unsigned int loccount = this->local_symbol_count_; | |
2225 | this->local_symbol_offset_ = off; | |
2226 | ||
b4ecf66b | 2227 | const bool relocatable = parameters->options().relocatable(); |
ef9beddf | 2228 | const Output_sections& out_sections(this->output_sections()); |
6fa2a40b | 2229 | const std::vector<Address>& out_offsets(this->section_offsets()); |
7bf1f802 ILT |
2230 | |
2231 | for (unsigned int i = 1; i < loccount; ++i) | |
2232 | { | |
aa98ff75 | 2233 | Symbol_value<size>* lv = &this->local_values_[i]; |
7bf1f802 | 2234 | |
6695e4b3 | 2235 | Compute_final_local_value_status cflv_status = |
aa98ff75 DK |
2236 | this->compute_final_local_value_internal(i, lv, lv, relocatable, |
2237 | out_sections, out_offsets, | |
2238 | symtab); | |
2239 | switch (cflv_status) | |
75f65a3e | 2240 | { |
aa98ff75 DK |
2241 | case CFLV_OK: |
2242 | if (!lv->is_output_symtab_index_set()) | |
75f65a3e | 2243 | { |
aa98ff75 DK |
2244 | lv->set_output_symtab_index(index); |
2245 | ++index; | |
75f65a3e | 2246 | } |
aa98ff75 DK |
2247 | break; |
2248 | case CFLV_DISCARDED: | |
2249 | case CFLV_ERROR: | |
2250 | // Do nothing. | |
2251 | break; | |
2252 | default: | |
2253 | gold_unreachable(); | |
75f65a3e | 2254 | } |
7bf1f802 ILT |
2255 | } |
2256 | return index; | |
2257 | } | |
645f8123 | 2258 | |
7bf1f802 | 2259 | // Set the output dynamic symbol table indexes for the local variables. |
c06b7b0b | 2260 | |
7bf1f802 ILT |
2261 | template<int size, bool big_endian> |
2262 | unsigned int | |
6fa2a40b CC |
2263 | Sized_relobj_file<size, big_endian>::do_set_local_dynsym_indexes( |
2264 | unsigned int index) | |
7bf1f802 ILT |
2265 | { |
2266 | const unsigned int loccount = this->local_symbol_count_; | |
2267 | for (unsigned int i = 1; i < loccount; ++i) | |
2268 | { | |
2269 | Symbol_value<size>& lv(this->local_values_[i]); | |
2270 | if (lv.needs_output_dynsym_entry()) | |
2271 | { | |
2272 | lv.set_output_dynsym_index(index); | |
2273 | ++index; | |
2274 | } | |
75f65a3e | 2275 | } |
7bf1f802 ILT |
2276 | return index; |
2277 | } | |
75f65a3e | 2278 | |
7bf1f802 ILT |
2279 | // Set the offset where local dynamic symbol information will be stored. |
2280 | // Returns the count of local symbols contributed to the symbol table by | |
2281 | // this object. | |
61ba1cf9 | 2282 | |
7bf1f802 ILT |
2283 | template<int size, bool big_endian> |
2284 | unsigned int | |
6fa2a40b | 2285 | Sized_relobj_file<size, big_endian>::do_set_local_dynsym_offset(off_t off) |
7bf1f802 ILT |
2286 | { |
2287 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); | |
2288 | this->local_dynsym_offset_ = off; | |
2289 | return this->output_local_dynsym_count_; | |
75f65a3e ILT |
2290 | } |
2291 | ||
ef15dade ST |
2292 | // If Symbols_data is not NULL get the section flags from here otherwise |
2293 | // get it from the file. | |
2294 | ||
2295 | template<int size, bool big_endian> | |
2296 | uint64_t | |
6fa2a40b | 2297 | Sized_relobj_file<size, big_endian>::do_section_flags(unsigned int shndx) |
ef15dade ST |
2298 | { |
2299 | Symbols_data* sd = this->get_symbols_data(); | |
2300 | if (sd != NULL) | |
2301 | { | |
2302 | const unsigned char* pshdrs = sd->section_headers_data | |
2303 | + This::shdr_size * shndx; | |
2304 | typename This::Shdr shdr(pshdrs); | |
2305 | return shdr.get_sh_flags(); | |
2306 | } | |
2307 | // If sd is NULL, read the section header from the file. | |
2308 | return this->elf_file_.section_flags(shndx); | |
2309 | } | |
2310 | ||
2311 | // Get the section's ent size from Symbols_data. Called by get_section_contents | |
2312 | // in icf.cc | |
2313 | ||
2314 | template<int size, bool big_endian> | |
2315 | uint64_t | |
6fa2a40b | 2316 | Sized_relobj_file<size, big_endian>::do_section_entsize(unsigned int shndx) |
ef15dade ST |
2317 | { |
2318 | Symbols_data* sd = this->get_symbols_data(); | |
ca09d69a | 2319 | gold_assert(sd != NULL); |
ef15dade ST |
2320 | |
2321 | const unsigned char* pshdrs = sd->section_headers_data | |
2322 | + This::shdr_size * shndx; | |
2323 | typename This::Shdr shdr(pshdrs); | |
2324 | return shdr.get_sh_entsize(); | |
2325 | } | |
2326 | ||
61ba1cf9 ILT |
2327 | // Write out the local symbols. |
2328 | ||
2329 | template<int size, bool big_endian> | |
2330 | void | |
6fa2a40b | 2331 | Sized_relobj_file<size, big_endian>::write_local_symbols( |
17a1d0a9 ILT |
2332 | Output_file* of, |
2333 | const Stringpool* sympool, | |
d491d34e ILT |
2334 | const Stringpool* dynpool, |
2335 | Output_symtab_xindex* symtab_xindex, | |
cdc29364 CC |
2336 | Output_symtab_xindex* dynsym_xindex, |
2337 | off_t symtab_off) | |
61ba1cf9 | 2338 | { |
99e9a495 ILT |
2339 | const bool strip_all = parameters->options().strip_all(); |
2340 | if (strip_all) | |
2341 | { | |
2342 | if (this->output_local_dynsym_count_ == 0) | |
2343 | return; | |
2344 | this->output_local_symbol_count_ = 0; | |
2345 | } | |
9e2dcb77 | 2346 | |
a3ad94ed | 2347 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 2348 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
2349 | { |
2350 | // This object has no symbols. Weird but legal. | |
2351 | return; | |
2352 | } | |
2353 | ||
2354 | // Read the symbol table section header. | |
2ea97941 | 2355 | const unsigned int symtab_shndx = this->symtab_shndx_; |
645f8123 | 2356 | typename This::Shdr symtabshdr(this, |
2ea97941 | 2357 | this->elf_file_.section_header(symtab_shndx)); |
a3ad94ed | 2358 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
92e059d8 | 2359 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 2360 | gold_assert(loccount == symtabshdr.get_sh_info()); |
61ba1cf9 ILT |
2361 | |
2362 | // Read the local symbols. | |
2ea97941 ILT |
2363 | const int sym_size = This::sym_size; |
2364 | off_t locsize = loccount * sym_size; | |
61ba1cf9 | 2365 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), |
39d0cb0e | 2366 | locsize, true, false); |
61ba1cf9 | 2367 | |
61ba1cf9 | 2368 | // Read the symbol names. |
d491d34e ILT |
2369 | const unsigned int strtab_shndx = |
2370 | this->adjust_shndx(symtabshdr.get_sh_link()); | |
8383303e | 2371 | section_size_type strtab_size; |
645f8123 | 2372 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, |
9eb9fa57 | 2373 | &strtab_size, |
cb295612 | 2374 | false); |
61ba1cf9 ILT |
2375 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
2376 | ||
7bf1f802 ILT |
2377 | // Get views into the output file for the portions of the symbol table |
2378 | // and the dynamic symbol table that we will be writing. | |
2ea97941 | 2379 | off_t output_size = this->output_local_symbol_count_ * sym_size; |
f2619d6c | 2380 | unsigned char* oview = NULL; |
7bf1f802 | 2381 | if (output_size > 0) |
cdc29364 CC |
2382 | oview = of->get_output_view(symtab_off + this->local_symbol_offset_, |
2383 | output_size); | |
7bf1f802 | 2384 | |
2ea97941 | 2385 | off_t dyn_output_size = this->output_local_dynsym_count_ * sym_size; |
7bf1f802 ILT |
2386 | unsigned char* dyn_oview = NULL; |
2387 | if (dyn_output_size > 0) | |
2388 | dyn_oview = of->get_output_view(this->local_dynsym_offset_, | |
2389 | dyn_output_size); | |
61ba1cf9 | 2390 | |
ef9beddf | 2391 | const Output_sections out_sections(this->output_sections()); |
c06b7b0b | 2392 | |
a3ad94ed | 2393 | gold_assert(this->local_values_.size() == loccount); |
61ba1cf9 | 2394 | |
61ba1cf9 | 2395 | unsigned char* ov = oview; |
7bf1f802 | 2396 | unsigned char* dyn_ov = dyn_oview; |
2ea97941 ILT |
2397 | psyms += sym_size; |
2398 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
61ba1cf9 ILT |
2399 | { |
2400 | elfcpp::Sym<size, big_endian> isym(psyms); | |
f6ce93d6 | 2401 | |
d491d34e ILT |
2402 | Symbol_value<size>& lv(this->local_values_[i]); |
2403 | ||
2404 | bool is_ordinary; | |
2405 | unsigned int st_shndx = this->adjust_sym_shndx(i, isym.get_st_shndx(), | |
2406 | &is_ordinary); | |
2407 | if (is_ordinary) | |
61ba1cf9 | 2408 | { |
ef9beddf ILT |
2409 | gold_assert(st_shndx < out_sections.size()); |
2410 | if (out_sections[st_shndx] == NULL) | |
61ba1cf9 | 2411 | continue; |
ef9beddf | 2412 | st_shndx = out_sections[st_shndx]->out_shndx(); |
d491d34e ILT |
2413 | if (st_shndx >= elfcpp::SHN_LORESERVE) |
2414 | { | |
d3bbad62 | 2415 | if (lv.has_output_symtab_entry()) |
d491d34e | 2416 | symtab_xindex->add(lv.output_symtab_index(), st_shndx); |
d3bbad62 | 2417 | if (lv.has_output_dynsym_entry()) |
d491d34e ILT |
2418 | dynsym_xindex->add(lv.output_dynsym_index(), st_shndx); |
2419 | st_shndx = elfcpp::SHN_XINDEX; | |
2420 | } | |
61ba1cf9 ILT |
2421 | } |
2422 | ||
7bf1f802 | 2423 | // Write the symbol to the output symbol table. |
d3bbad62 | 2424 | if (lv.has_output_symtab_entry()) |
7bf1f802 ILT |
2425 | { |
2426 | elfcpp::Sym_write<size, big_endian> osym(ov); | |
2427 | ||
2428 | gold_assert(isym.get_st_name() < strtab_size); | |
2ea97941 ILT |
2429 | const char* name = pnames + isym.get_st_name(); |
2430 | osym.put_st_name(sympool->get_offset(name)); | |
7bf1f802 ILT |
2431 | osym.put_st_value(this->local_values_[i].value(this, 0)); |
2432 | osym.put_st_size(isym.get_st_size()); | |
2433 | osym.put_st_info(isym.get_st_info()); | |
2434 | osym.put_st_other(isym.get_st_other()); | |
2435 | osym.put_st_shndx(st_shndx); | |
2436 | ||
2ea97941 | 2437 | ov += sym_size; |
7bf1f802 ILT |
2438 | } |
2439 | ||
2440 | // Write the symbol to the output dynamic symbol table. | |
d3bbad62 | 2441 | if (lv.has_output_dynsym_entry()) |
7bf1f802 ILT |
2442 | { |
2443 | gold_assert(dyn_ov < dyn_oview + dyn_output_size); | |
2444 | elfcpp::Sym_write<size, big_endian> osym(dyn_ov); | |
2445 | ||
2446 | gold_assert(isym.get_st_name() < strtab_size); | |
2ea97941 ILT |
2447 | const char* name = pnames + isym.get_st_name(); |
2448 | osym.put_st_name(dynpool->get_offset(name)); | |
7bf1f802 ILT |
2449 | osym.put_st_value(this->local_values_[i].value(this, 0)); |
2450 | osym.put_st_size(isym.get_st_size()); | |
2451 | osym.put_st_info(isym.get_st_info()); | |
2452 | osym.put_st_other(isym.get_st_other()); | |
2453 | osym.put_st_shndx(st_shndx); | |
2454 | ||
2ea97941 | 2455 | dyn_ov += sym_size; |
7bf1f802 ILT |
2456 | } |
2457 | } | |
f6ce93d6 | 2458 | |
61ba1cf9 | 2459 | |
7bf1f802 ILT |
2460 | if (output_size > 0) |
2461 | { | |
2462 | gold_assert(ov - oview == output_size); | |
cdc29364 CC |
2463 | of->write_output_view(symtab_off + this->local_symbol_offset_, |
2464 | output_size, oview); | |
61ba1cf9 ILT |
2465 | } |
2466 | ||
7bf1f802 ILT |
2467 | if (dyn_output_size > 0) |
2468 | { | |
2469 | gold_assert(dyn_ov - dyn_oview == dyn_output_size); | |
2470 | of->write_output_view(this->local_dynsym_offset_, dyn_output_size, | |
2471 | dyn_oview); | |
2472 | } | |
61ba1cf9 ILT |
2473 | } |
2474 | ||
f7e2ee48 ILT |
2475 | // Set *INFO to symbolic information about the offset OFFSET in the |
2476 | // section SHNDX. Return true if we found something, false if we | |
2477 | // found nothing. | |
2478 | ||
2479 | template<int size, bool big_endian> | |
2480 | bool | |
6fa2a40b | 2481 | Sized_relobj_file<size, big_endian>::get_symbol_location_info( |
f7e2ee48 | 2482 | unsigned int shndx, |
2ea97941 | 2483 | off_t offset, |
f7e2ee48 ILT |
2484 | Symbol_location_info* info) |
2485 | { | |
2486 | if (this->symtab_shndx_ == 0) | |
2487 | return false; | |
2488 | ||
8383303e | 2489 | section_size_type symbols_size; |
f7e2ee48 ILT |
2490 | const unsigned char* symbols = this->section_contents(this->symtab_shndx_, |
2491 | &symbols_size, | |
2492 | false); | |
2493 | ||
d491d34e ILT |
2494 | unsigned int symbol_names_shndx = |
2495 | this->adjust_shndx(this->section_link(this->symtab_shndx_)); | |
8383303e | 2496 | section_size_type names_size; |
f7e2ee48 ILT |
2497 | const unsigned char* symbol_names_u = |
2498 | this->section_contents(symbol_names_shndx, &names_size, false); | |
2499 | const char* symbol_names = reinterpret_cast<const char*>(symbol_names_u); | |
2500 | ||
2ea97941 ILT |
2501 | const int sym_size = This::sym_size; |
2502 | const size_t count = symbols_size / sym_size; | |
f7e2ee48 ILT |
2503 | |
2504 | const unsigned char* p = symbols; | |
2ea97941 | 2505 | for (size_t i = 0; i < count; ++i, p += sym_size) |
f7e2ee48 ILT |
2506 | { |
2507 | elfcpp::Sym<size, big_endian> sym(p); | |
2508 | ||
2509 | if (sym.get_st_type() == elfcpp::STT_FILE) | |
2510 | { | |
2511 | if (sym.get_st_name() >= names_size) | |
2512 | info->source_file = "(invalid)"; | |
2513 | else | |
2514 | info->source_file = symbol_names + sym.get_st_name(); | |
d491d34e | 2515 | continue; |
f7e2ee48 | 2516 | } |
d491d34e ILT |
2517 | |
2518 | bool is_ordinary; | |
2519 | unsigned int st_shndx = this->adjust_sym_shndx(i, sym.get_st_shndx(), | |
2520 | &is_ordinary); | |
2521 | if (is_ordinary | |
2522 | && st_shndx == shndx | |
2ea97941 | 2523 | && static_cast<off_t>(sym.get_st_value()) <= offset |
d491d34e | 2524 | && (static_cast<off_t>(sym.get_st_value() + sym.get_st_size()) |
2ea97941 | 2525 | > offset)) |
f7e2ee48 ILT |
2526 | { |
2527 | if (sym.get_st_name() > names_size) | |
2528 | info->enclosing_symbol_name = "(invalid)"; | |
2529 | else | |
a2b1aa12 ILT |
2530 | { |
2531 | info->enclosing_symbol_name = symbol_names + sym.get_st_name(); | |
086a1841 | 2532 | if (parameters->options().do_demangle()) |
a2b1aa12 ILT |
2533 | { |
2534 | char* demangled_name = cplus_demangle( | |
2535 | info->enclosing_symbol_name.c_str(), | |
2536 | DMGL_ANSI | DMGL_PARAMS); | |
2537 | if (demangled_name != NULL) | |
2538 | { | |
2539 | info->enclosing_symbol_name.assign(demangled_name); | |
2540 | free(demangled_name); | |
2541 | } | |
2542 | } | |
2543 | } | |
f7e2ee48 ILT |
2544 | return true; |
2545 | } | |
2546 | } | |
2547 | ||
2548 | return false; | |
2549 | } | |
2550 | ||
e94cf127 CC |
2551 | // Look for a kept section corresponding to the given discarded section, |
2552 | // and return its output address. This is used only for relocations in | |
2553 | // debugging sections. If we can't find the kept section, return 0. | |
2554 | ||
2555 | template<int size, bool big_endian> | |
6fa2a40b CC |
2556 | typename Sized_relobj_file<size, big_endian>::Address |
2557 | Sized_relobj_file<size, big_endian>::map_to_kept_section( | |
e94cf127 CC |
2558 | unsigned int shndx, |
2559 | bool* found) const | |
2560 | { | |
1ef4d87f ILT |
2561 | Relobj* kept_object; |
2562 | unsigned int kept_shndx; | |
2563 | if (this->get_kept_comdat_section(shndx, &kept_object, &kept_shndx)) | |
e94cf127 | 2564 | { |
6fa2a40b CC |
2565 | Sized_relobj_file<size, big_endian>* kept_relobj = |
2566 | static_cast<Sized_relobj_file<size, big_endian>*>(kept_object); | |
1ef4d87f | 2567 | Output_section* os = kept_relobj->output_section(kept_shndx); |
2ea97941 ILT |
2568 | Address offset = kept_relobj->get_output_section_offset(kept_shndx); |
2569 | if (os != NULL && offset != invalid_address) | |
1ef4d87f ILT |
2570 | { |
2571 | *found = true; | |
2ea97941 | 2572 | return os->address() + offset; |
1ef4d87f | 2573 | } |
e94cf127 CC |
2574 | } |
2575 | *found = false; | |
2576 | return 0; | |
2577 | } | |
2578 | ||
92de84a6 ILT |
2579 | // Get symbol counts. |
2580 | ||
2581 | template<int size, bool big_endian> | |
2582 | void | |
6fa2a40b | 2583 | Sized_relobj_file<size, big_endian>::do_get_global_symbol_counts( |
92de84a6 ILT |
2584 | const Symbol_table*, |
2585 | size_t* defined, | |
2586 | size_t* used) const | |
2587 | { | |
2588 | *defined = this->defined_count_; | |
2589 | size_t count = 0; | |
cdc29364 | 2590 | for (typename Symbols::const_iterator p = this->symbols_.begin(); |
92de84a6 ILT |
2591 | p != this->symbols_.end(); |
2592 | ++p) | |
2593 | if (*p != NULL | |
2594 | && (*p)->source() == Symbol::FROM_OBJECT | |
2595 | && (*p)->object() == this | |
2596 | && (*p)->is_defined()) | |
2597 | ++count; | |
2598 | *used = count; | |
2599 | } | |
2600 | ||
5dd8762a CC |
2601 | // Return a view of the decompressed contents of a section. Set *PLEN |
2602 | // to the size. Set *IS_NEW to true if the contents need to be freed | |
2603 | // by the caller. | |
2604 | ||
2605 | template<int size, bool big_endian> | |
2606 | const unsigned char* | |
2607 | Sized_relobj_file<size, big_endian>::do_decompressed_section_contents( | |
2608 | unsigned int shndx, | |
2609 | section_size_type* plen, | |
2610 | bool* is_new) | |
2611 | { | |
2612 | section_size_type buffer_size; | |
2613 | const unsigned char* buffer = this->section_contents(shndx, &buffer_size, | |
2614 | false); | |
2615 | ||
2616 | if (this->compressed_sections_ == NULL) | |
2617 | { | |
2618 | *plen = buffer_size; | |
2619 | *is_new = false; | |
2620 | return buffer; | |
2621 | } | |
2622 | ||
2623 | Compressed_section_map::const_iterator p = | |
2624 | this->compressed_sections_->find(shndx); | |
2625 | if (p == this->compressed_sections_->end()) | |
2626 | { | |
2627 | *plen = buffer_size; | |
2628 | *is_new = false; | |
2629 | return buffer; | |
2630 | } | |
2631 | ||
2632 | section_size_type uncompressed_size = p->second.size; | |
2633 | if (p->second.contents != NULL) | |
2634 | { | |
2635 | *plen = uncompressed_size; | |
2636 | *is_new = false; | |
2637 | return p->second.contents; | |
2638 | } | |
2639 | ||
2640 | unsigned char* uncompressed_data = new unsigned char[uncompressed_size]; | |
2641 | if (!decompress_input_section(buffer, | |
2642 | buffer_size, | |
2643 | uncompressed_data, | |
2644 | uncompressed_size)) | |
2645 | this->error(_("could not decompress section %s"), | |
2646 | this->do_section_name(shndx).c_str()); | |
2647 | ||
2648 | // We could cache the results in p->second.contents and store | |
2649 | // false in *IS_NEW, but build_compressed_section_map() would | |
2650 | // have done so if it had expected it to be profitable. If | |
2651 | // we reach this point, we expect to need the contents only | |
2652 | // once in this pass. | |
2653 | *plen = uncompressed_size; | |
2654 | *is_new = true; | |
2655 | return uncompressed_data; | |
2656 | } | |
2657 | ||
2658 | // Discard any buffers of uncompressed sections. This is done | |
2659 | // at the end of the Add_symbols task. | |
2660 | ||
2661 | template<int size, bool big_endian> | |
2662 | void | |
2663 | Sized_relobj_file<size, big_endian>::do_discard_decompressed_sections() | |
2664 | { | |
2665 | if (this->compressed_sections_ == NULL) | |
2666 | return; | |
2667 | ||
2668 | for (Compressed_section_map::iterator p = this->compressed_sections_->begin(); | |
2669 | p != this->compressed_sections_->end(); | |
2670 | ++p) | |
2671 | { | |
2672 | if (p->second.contents != NULL) | |
2673 | { | |
2674 | delete[] p->second.contents; | |
2675 | p->second.contents = NULL; | |
2676 | } | |
2677 | } | |
2678 | } | |
2679 | ||
54dc6425 ILT |
2680 | // Input_objects methods. |
2681 | ||
008db82e ILT |
2682 | // Add a regular relocatable object to the list. Return false if this |
2683 | // object should be ignored. | |
f6ce93d6 | 2684 | |
008db82e | 2685 | bool |
54dc6425 ILT |
2686 | Input_objects::add_object(Object* obj) |
2687 | { | |
c5818ff1 CC |
2688 | // Print the filename if the -t/--trace option is selected. |
2689 | if (parameters->options().trace()) | |
2690 | gold_info("%s", obj->name().c_str()); | |
2691 | ||
008db82e | 2692 | if (!obj->is_dynamic()) |
f6ce93d6 | 2693 | this->relobj_list_.push_back(static_cast<Relobj*>(obj)); |
008db82e ILT |
2694 | else |
2695 | { | |
2696 | // See if this is a duplicate SONAME. | |
2697 | Dynobj* dynobj = static_cast<Dynobj*>(obj); | |
9a2d6984 | 2698 | const char* soname = dynobj->soname(); |
008db82e ILT |
2699 | |
2700 | std::pair<Unordered_set<std::string>::iterator, bool> ins = | |
9a2d6984 | 2701 | this->sonames_.insert(soname); |
008db82e ILT |
2702 | if (!ins.second) |
2703 | { | |
2704 | // We have already seen a dynamic object with this soname. | |
2705 | return false; | |
2706 | } | |
2707 | ||
2708 | this->dynobj_list_.push_back(dynobj); | |
2709 | } | |
75f65a3e | 2710 | |
92de84a6 | 2711 | // Add this object to the cross-referencer if requested. |
dde3f402 ILT |
2712 | if (parameters->options().user_set_print_symbol_counts() |
2713 | || parameters->options().cref()) | |
92de84a6 ILT |
2714 | { |
2715 | if (this->cref_ == NULL) | |
2716 | this->cref_ = new Cref(); | |
2717 | this->cref_->add_object(obj); | |
2718 | } | |
2719 | ||
008db82e | 2720 | return true; |
54dc6425 ILT |
2721 | } |
2722 | ||
e2827e5f ILT |
2723 | // For each dynamic object, record whether we've seen all of its |
2724 | // explicit dependencies. | |
2725 | ||
2726 | void | |
2727 | Input_objects::check_dynamic_dependencies() const | |
2728 | { | |
7eaea549 | 2729 | bool issued_copy_dt_needed_error = false; |
e2827e5f ILT |
2730 | for (Dynobj_list::const_iterator p = this->dynobj_list_.begin(); |
2731 | p != this->dynobj_list_.end(); | |
2732 | ++p) | |
2733 | { | |
2734 | const Dynobj::Needed& needed((*p)->needed()); | |
2735 | bool found_all = true; | |
7eaea549 ILT |
2736 | Dynobj::Needed::const_iterator pneeded; |
2737 | for (pneeded = needed.begin(); pneeded != needed.end(); ++pneeded) | |
e2827e5f ILT |
2738 | { |
2739 | if (this->sonames_.find(*pneeded) == this->sonames_.end()) | |
2740 | { | |
2741 | found_all = false; | |
2742 | break; | |
2743 | } | |
2744 | } | |
2745 | (*p)->set_has_unknown_needed_entries(!found_all); | |
7eaea549 ILT |
2746 | |
2747 | // --copy-dt-needed-entries aka --add-needed is a GNU ld option | |
612bdda1 ILT |
2748 | // that gold does not support. However, they cause no trouble |
2749 | // unless there is a DT_NEEDED entry that we don't know about; | |
2750 | // warn only in that case. | |
7eaea549 ILT |
2751 | if (!found_all |
2752 | && !issued_copy_dt_needed_error | |
2753 | && (parameters->options().copy_dt_needed_entries() | |
2754 | || parameters->options().add_needed())) | |
2755 | { | |
2756 | const char* optname; | |
2757 | if (parameters->options().copy_dt_needed_entries()) | |
2758 | optname = "--copy-dt-needed-entries"; | |
2759 | else | |
2760 | optname = "--add-needed"; | |
2761 | gold_error(_("%s is not supported but is required for %s in %s"), | |
2762 | optname, (*pneeded).c_str(), (*p)->name().c_str()); | |
2763 | issued_copy_dt_needed_error = true; | |
2764 | } | |
e2827e5f ILT |
2765 | } |
2766 | } | |
2767 | ||
92de84a6 ILT |
2768 | // Start processing an archive. |
2769 | ||
2770 | void | |
2771 | Input_objects::archive_start(Archive* archive) | |
2772 | { | |
dde3f402 ILT |
2773 | if (parameters->options().user_set_print_symbol_counts() |
2774 | || parameters->options().cref()) | |
92de84a6 ILT |
2775 | { |
2776 | if (this->cref_ == NULL) | |
2777 | this->cref_ = new Cref(); | |
2778 | this->cref_->add_archive_start(archive); | |
2779 | } | |
2780 | } | |
2781 | ||
2782 | // Stop processing an archive. | |
2783 | ||
2784 | void | |
2785 | Input_objects::archive_stop(Archive* archive) | |
2786 | { | |
dde3f402 ILT |
2787 | if (parameters->options().user_set_print_symbol_counts() |
2788 | || parameters->options().cref()) | |
92de84a6 ILT |
2789 | this->cref_->add_archive_stop(archive); |
2790 | } | |
2791 | ||
2792 | // Print symbol counts | |
2793 | ||
2794 | void | |
2795 | Input_objects::print_symbol_counts(const Symbol_table* symtab) const | |
2796 | { | |
2797 | if (parameters->options().user_set_print_symbol_counts() | |
2798 | && this->cref_ != NULL) | |
2799 | this->cref_->print_symbol_counts(symtab); | |
2800 | } | |
2801 | ||
dde3f402 ILT |
2802 | // Print a cross reference table. |
2803 | ||
2804 | void | |
2805 | Input_objects::print_cref(const Symbol_table* symtab, FILE* f) const | |
2806 | { | |
2807 | if (parameters->options().cref() && this->cref_ != NULL) | |
2808 | this->cref_->print_cref(symtab, f); | |
2809 | } | |
2810 | ||
92e059d8 ILT |
2811 | // Relocate_info methods. |
2812 | ||
308ecdc7 ILT |
2813 | // Return a string describing the location of a relocation when file |
2814 | // and lineno information is not available. This is only used in | |
2815 | // error messages. | |
92e059d8 ILT |
2816 | |
2817 | template<int size, bool big_endian> | |
2818 | std::string | |
f7e2ee48 | 2819 | Relocate_info<size, big_endian>::location(size_t, off_t offset) const |
92e059d8 | 2820 | { |
a55ce7fe | 2821 | Sized_dwarf_line_info<size, big_endian> line_info(this->object); |
308ecdc7 ILT |
2822 | std::string ret = line_info.addr2line(this->data_shndx, offset, NULL); |
2823 | if (!ret.empty()) | |
2824 | return ret; | |
2825 | ||
2826 | ret = this->object->name(); | |
4c50553d | 2827 | |
f7e2ee48 ILT |
2828 | Symbol_location_info info; |
2829 | if (this->object->get_symbol_location_info(this->data_shndx, offset, &info)) | |
2830 | { | |
308ecdc7 ILT |
2831 | if (!info.source_file.empty()) |
2832 | { | |
2833 | ret += ":"; | |
2834 | ret += info.source_file; | |
2835 | } | |
2836 | size_t len = info.enclosing_symbol_name.length() + 100; | |
2837 | char* buf = new char[len]; | |
2838 | snprintf(buf, len, _(":function %s"), | |
2839 | info.enclosing_symbol_name.c_str()); | |
5c2c6c95 | 2840 | ret += buf; |
308ecdc7 ILT |
2841 | delete[] buf; |
2842 | return ret; | |
f7e2ee48 | 2843 | } |
308ecdc7 ILT |
2844 | |
2845 | ret += "("; | |
2846 | ret += this->object->section_name(this->data_shndx); | |
2847 | char buf[100]; | |
2848 | snprintf(buf, sizeof buf, "+0x%lx)", static_cast<long>(offset)); | |
2849 | ret += buf; | |
92e059d8 ILT |
2850 | return ret; |
2851 | } | |
2852 | ||
bae7f79e ILT |
2853 | } // End namespace gold. |
2854 | ||
2855 | namespace | |
2856 | { | |
2857 | ||
2858 | using namespace gold; | |
2859 | ||
2860 | // Read an ELF file with the header and return the appropriate | |
2861 | // instance of Object. | |
2862 | ||
2863 | template<int size, bool big_endian> | |
2864 | Object* | |
2865 | make_elf_sized_object(const std::string& name, Input_file* input_file, | |
029ba973 ILT |
2866 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr, |
2867 | bool* punconfigured) | |
bae7f79e | 2868 | { |
f733487b DK |
2869 | Target* target = select_target(ehdr.get_e_machine(), size, big_endian, |
2870 | ehdr.get_e_ident()[elfcpp::EI_OSABI], | |
2871 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); | |
2872 | if (target == NULL) | |
2873 | gold_fatal(_("%s: unsupported ELF machine number %d"), | |
2874 | name.c_str(), ehdr.get_e_machine()); | |
029ba973 ILT |
2875 | |
2876 | if (!parameters->target_valid()) | |
2877 | set_parameters_target(target); | |
2878 | else if (target != ¶meters->target()) | |
2879 | { | |
2880 | if (punconfigured != NULL) | |
2881 | *punconfigured = true; | |
2882 | else | |
2883 | gold_error(_("%s: incompatible target"), name.c_str()); | |
2884 | return NULL; | |
2885 | } | |
2886 | ||
f733487b DK |
2887 | return target->make_elf_object<size, big_endian>(name, input_file, offset, |
2888 | ehdr); | |
bae7f79e ILT |
2889 | } |
2890 | ||
2891 | } // End anonymous namespace. | |
2892 | ||
2893 | namespace gold | |
2894 | { | |
2895 | ||
f6060a4d ILT |
2896 | // Return whether INPUT_FILE is an ELF object. |
2897 | ||
2898 | bool | |
2899 | is_elf_object(Input_file* input_file, off_t offset, | |
ca09d69a | 2900 | const unsigned char** start, int* read_size) |
f6060a4d ILT |
2901 | { |
2902 | off_t filesize = input_file->file().filesize(); | |
c549a694 | 2903 | int want = elfcpp::Elf_recognizer::max_header_size; |
f6060a4d ILT |
2904 | if (filesize - offset < want) |
2905 | want = filesize - offset; | |
2906 | ||
2907 | const unsigned char* p = input_file->file().get_view(offset, 0, want, | |
2908 | true, false); | |
2909 | *start = p; | |
2910 | *read_size = want; | |
2911 | ||
c549a694 | 2912 | return elfcpp::Elf_recognizer::is_elf_file(p, want); |
f6060a4d ILT |
2913 | } |
2914 | ||
bae7f79e ILT |
2915 | // Read an ELF file and return the appropriate instance of Object. |
2916 | ||
2917 | Object* | |
2918 | make_elf_object(const std::string& name, Input_file* input_file, off_t offset, | |
15f8229b ILT |
2919 | const unsigned char* p, section_offset_type bytes, |
2920 | bool* punconfigured) | |
bae7f79e | 2921 | { |
15f8229b ILT |
2922 | if (punconfigured != NULL) |
2923 | *punconfigured = false; | |
2924 | ||
c549a694 | 2925 | std::string error; |
ac33a407 DK |
2926 | bool big_endian = false; |
2927 | int size = 0; | |
c549a694 ILT |
2928 | if (!elfcpp::Elf_recognizer::is_valid_header(p, bytes, &size, |
2929 | &big_endian, &error)) | |
bae7f79e | 2930 | { |
c549a694 | 2931 | gold_error(_("%s: %s"), name.c_str(), error.c_str()); |
75f2446e | 2932 | return NULL; |
bae7f79e ILT |
2933 | } |
2934 | ||
c549a694 | 2935 | if (size == 32) |
bae7f79e | 2936 | { |
bae7f79e ILT |
2937 | if (big_endian) |
2938 | { | |
193a53d9 | 2939 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e ILT |
2940 | elfcpp::Ehdr<32, true> ehdr(p); |
2941 | return make_elf_sized_object<32, true>(name, input_file, | |
029ba973 | 2942 | offset, ehdr, punconfigured); |
193a53d9 | 2943 | #else |
15f8229b ILT |
2944 | if (punconfigured != NULL) |
2945 | *punconfigured = true; | |
2946 | else | |
2947 | gold_error(_("%s: not configured to support " | |
2948 | "32-bit big-endian object"), | |
2949 | name.c_str()); | |
75f2446e | 2950 | return NULL; |
193a53d9 | 2951 | #endif |
bae7f79e ILT |
2952 | } |
2953 | else | |
2954 | { | |
193a53d9 | 2955 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e ILT |
2956 | elfcpp::Ehdr<32, false> ehdr(p); |
2957 | return make_elf_sized_object<32, false>(name, input_file, | |
029ba973 | 2958 | offset, ehdr, punconfigured); |
193a53d9 | 2959 | #else |
15f8229b ILT |
2960 | if (punconfigured != NULL) |
2961 | *punconfigured = true; | |
2962 | else | |
2963 | gold_error(_("%s: not configured to support " | |
2964 | "32-bit little-endian object"), | |
2965 | name.c_str()); | |
75f2446e | 2966 | return NULL; |
193a53d9 | 2967 | #endif |
bae7f79e ILT |
2968 | } |
2969 | } | |
c549a694 | 2970 | else if (size == 64) |
bae7f79e | 2971 | { |
bae7f79e ILT |
2972 | if (big_endian) |
2973 | { | |
193a53d9 | 2974 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e ILT |
2975 | elfcpp::Ehdr<64, true> ehdr(p); |
2976 | return make_elf_sized_object<64, true>(name, input_file, | |
029ba973 | 2977 | offset, ehdr, punconfigured); |
193a53d9 | 2978 | #else |
15f8229b ILT |
2979 | if (punconfigured != NULL) |
2980 | *punconfigured = true; | |
2981 | else | |
2982 | gold_error(_("%s: not configured to support " | |
2983 | "64-bit big-endian object"), | |
2984 | name.c_str()); | |
75f2446e | 2985 | return NULL; |
193a53d9 | 2986 | #endif |
bae7f79e ILT |
2987 | } |
2988 | else | |
2989 | { | |
193a53d9 | 2990 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e ILT |
2991 | elfcpp::Ehdr<64, false> ehdr(p); |
2992 | return make_elf_sized_object<64, false>(name, input_file, | |
029ba973 | 2993 | offset, ehdr, punconfigured); |
193a53d9 | 2994 | #else |
15f8229b ILT |
2995 | if (punconfigured != NULL) |
2996 | *punconfigured = true; | |
2997 | else | |
2998 | gold_error(_("%s: not configured to support " | |
2999 | "64-bit little-endian object"), | |
3000 | name.c_str()); | |
75f2446e | 3001 | return NULL; |
193a53d9 | 3002 | #endif |
bae7f79e ILT |
3003 | } |
3004 | } | |
c549a694 ILT |
3005 | else |
3006 | gold_unreachable(); | |
bae7f79e ILT |
3007 | } |
3008 | ||
04bf7072 ILT |
3009 | // Instantiate the templates we need. |
3010 | ||
3011 | #ifdef HAVE_TARGET_32_LITTLE | |
3012 | template | |
3013 | void | |
3014 | Object::read_section_data<32, false>(elfcpp::Elf_file<32, false, Object>*, | |
3015 | Read_symbols_data*); | |
3016 | #endif | |
3017 | ||
3018 | #ifdef HAVE_TARGET_32_BIG | |
3019 | template | |
3020 | void | |
3021 | Object::read_section_data<32, true>(elfcpp::Elf_file<32, true, Object>*, | |
3022 | Read_symbols_data*); | |
3023 | #endif | |
3024 | ||
3025 | #ifdef HAVE_TARGET_64_LITTLE | |
3026 | template | |
3027 | void | |
3028 | Object::read_section_data<64, false>(elfcpp::Elf_file<64, false, Object>*, | |
3029 | Read_symbols_data*); | |
3030 | #endif | |
3031 | ||
3032 | #ifdef HAVE_TARGET_64_BIG | |
3033 | template | |
3034 | void | |
3035 | Object::read_section_data<64, true>(elfcpp::Elf_file<64, true, Object>*, | |
3036 | Read_symbols_data*); | |
3037 | #endif | |
bae7f79e | 3038 | |
193a53d9 | 3039 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e | 3040 | template |
6fa2a40b | 3041 | class Sized_relobj_file<32, false>; |
193a53d9 | 3042 | #endif |
bae7f79e | 3043 | |
193a53d9 | 3044 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e | 3045 | template |
6fa2a40b | 3046 | class Sized_relobj_file<32, true>; |
193a53d9 | 3047 | #endif |
bae7f79e | 3048 | |
193a53d9 | 3049 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e | 3050 | template |
6fa2a40b | 3051 | class Sized_relobj_file<64, false>; |
193a53d9 | 3052 | #endif |
bae7f79e | 3053 | |
193a53d9 | 3054 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e | 3055 | template |
6fa2a40b | 3056 | class Sized_relobj_file<64, true>; |
193a53d9 | 3057 | #endif |
bae7f79e | 3058 | |
193a53d9 | 3059 | #ifdef HAVE_TARGET_32_LITTLE |
92e059d8 ILT |
3060 | template |
3061 | struct Relocate_info<32, false>; | |
193a53d9 | 3062 | #endif |
92e059d8 | 3063 | |
193a53d9 | 3064 | #ifdef HAVE_TARGET_32_BIG |
92e059d8 ILT |
3065 | template |
3066 | struct Relocate_info<32, true>; | |
193a53d9 | 3067 | #endif |
92e059d8 | 3068 | |
193a53d9 | 3069 | #ifdef HAVE_TARGET_64_LITTLE |
92e059d8 ILT |
3070 | template |
3071 | struct Relocate_info<64, false>; | |
193a53d9 | 3072 | #endif |
92e059d8 | 3073 | |
193a53d9 | 3074 | #ifdef HAVE_TARGET_64_BIG |
92e059d8 ILT |
3075 | template |
3076 | struct Relocate_info<64, true>; | |
193a53d9 | 3077 | #endif |
92e059d8 | 3078 | |
9d3b86f6 ILT |
3079 | #ifdef HAVE_TARGET_32_LITTLE |
3080 | template | |
3081 | void | |
3082 | Xindex::initialize_symtab_xindex<32, false>(Object*, unsigned int); | |
3083 | ||
3084 | template | |
3085 | void | |
3086 | Xindex::read_symtab_xindex<32, false>(Object*, unsigned int, | |
3087 | const unsigned char*); | |
3088 | #endif | |
3089 | ||
3090 | #ifdef HAVE_TARGET_32_BIG | |
3091 | template | |
3092 | void | |
3093 | Xindex::initialize_symtab_xindex<32, true>(Object*, unsigned int); | |
3094 | ||
3095 | template | |
3096 | void | |
3097 | Xindex::read_symtab_xindex<32, true>(Object*, unsigned int, | |
3098 | const unsigned char*); | |
3099 | #endif | |
3100 | ||
3101 | #ifdef HAVE_TARGET_64_LITTLE | |
3102 | template | |
3103 | void | |
3104 | Xindex::initialize_symtab_xindex<64, false>(Object*, unsigned int); | |
3105 | ||
3106 | template | |
3107 | void | |
3108 | Xindex::read_symtab_xindex<64, false>(Object*, unsigned int, | |
3109 | const unsigned char*); | |
3110 | #endif | |
3111 | ||
3112 | #ifdef HAVE_TARGET_64_BIG | |
3113 | template | |
3114 | void | |
3115 | Xindex::initialize_symtab_xindex<64, true>(Object*, unsigned int); | |
3116 | ||
3117 | template | |
3118 | void | |
3119 | Xindex::read_symtab_xindex<64, true>(Object*, unsigned int, | |
3120 | const unsigned char*); | |
3121 | #endif | |
3122 | ||
bae7f79e | 3123 | } // End namespace gold. |