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bae7f79e ILT |
1 | // object.cc -- support for an object file for linking in gold |
2 | ||
ebdbb458 | 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
6cb15b7f ILT |
4 | // Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
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 | |
14bfc3f5 | 31 | #include "target-select.h" |
5c2c6c95 | 32 | #include "dwarf_reader.h" |
a2fb1b05 | 33 | #include "layout.h" |
61ba1cf9 | 34 | #include "output.h" |
f6ce93d6 | 35 | #include "symtab.h" |
92de84a6 | 36 | #include "cref.h" |
4c50553d | 37 | #include "reloc.h" |
f6ce93d6 ILT |
38 | #include "object.h" |
39 | #include "dynobj.h" | |
5995b570 | 40 | #include "plugin.h" |
bae7f79e ILT |
41 | |
42 | namespace gold | |
43 | { | |
44 | ||
d491d34e ILT |
45 | // Class Xindex. |
46 | ||
47 | // Initialize the symtab_xindex_ array. Find the SHT_SYMTAB_SHNDX | |
48 | // section and read it in. SYMTAB_SHNDX is the index of the symbol | |
49 | // table we care about. | |
50 | ||
51 | template<int size, bool big_endian> | |
52 | void | |
53 | Xindex::initialize_symtab_xindex(Object* object, unsigned int symtab_shndx) | |
54 | { | |
55 | if (!this->symtab_xindex_.empty()) | |
56 | return; | |
57 | ||
58 | gold_assert(symtab_shndx != 0); | |
59 | ||
60 | // Look through the sections in reverse order, on the theory that it | |
61 | // is more likely to be near the end than the beginning. | |
62 | unsigned int i = object->shnum(); | |
63 | while (i > 0) | |
64 | { | |
65 | --i; | |
66 | if (object->section_type(i) == elfcpp::SHT_SYMTAB_SHNDX | |
67 | && this->adjust_shndx(object->section_link(i)) == symtab_shndx) | |
68 | { | |
69 | this->read_symtab_xindex<size, big_endian>(object, i, NULL); | |
70 | return; | |
71 | } | |
72 | } | |
73 | ||
74 | object->error(_("missing SHT_SYMTAB_SHNDX section")); | |
75 | } | |
76 | ||
77 | // Read in the symtab_xindex_ array, given the section index of the | |
78 | // SHT_SYMTAB_SHNDX section. If PSHDRS is not NULL, it points at the | |
79 | // section headers. | |
80 | ||
81 | template<int size, bool big_endian> | |
82 | void | |
83 | Xindex::read_symtab_xindex(Object* object, unsigned int xindex_shndx, | |
84 | const unsigned char* pshdrs) | |
85 | { | |
86 | section_size_type bytecount; | |
87 | const unsigned char* contents; | |
88 | if (pshdrs == NULL) | |
89 | contents = object->section_contents(xindex_shndx, &bytecount, false); | |
90 | else | |
91 | { | |
92 | const unsigned char* p = (pshdrs | |
93 | + (xindex_shndx | |
94 | * elfcpp::Elf_sizes<size>::shdr_size)); | |
95 | typename elfcpp::Shdr<size, big_endian> shdr(p); | |
96 | bytecount = convert_to_section_size_type(shdr.get_sh_size()); | |
97 | contents = object->get_view(shdr.get_sh_offset(), bytecount, true, false); | |
98 | } | |
99 | ||
100 | gold_assert(this->symtab_xindex_.empty()); | |
101 | this->symtab_xindex_.reserve(bytecount / 4); | |
102 | for (section_size_type i = 0; i < bytecount; i += 4) | |
103 | { | |
104 | unsigned int shndx = elfcpp::Swap<32, big_endian>::readval(contents + i); | |
105 | // We preadjust the section indexes we save. | |
106 | this->symtab_xindex_.push_back(this->adjust_shndx(shndx)); | |
107 | } | |
108 | } | |
109 | ||
110 | // Symbol symndx has a section of SHN_XINDEX; return the real section | |
111 | // index. | |
112 | ||
113 | unsigned int | |
114 | Xindex::sym_xindex_to_shndx(Object* object, unsigned int symndx) | |
115 | { | |
116 | if (symndx >= this->symtab_xindex_.size()) | |
117 | { | |
118 | object->error(_("symbol %u out of range for SHT_SYMTAB_SHNDX section"), | |
119 | symndx); | |
120 | return elfcpp::SHN_UNDEF; | |
121 | } | |
122 | unsigned int shndx = this->symtab_xindex_[symndx]; | |
123 | if (shndx < elfcpp::SHN_LORESERVE || shndx >= object->shnum()) | |
124 | { | |
125 | object->error(_("extended index for symbol %u out of range: %u"), | |
126 | symndx, shndx); | |
127 | return elfcpp::SHN_UNDEF; | |
128 | } | |
129 | return shndx; | |
130 | } | |
131 | ||
645f8123 ILT |
132 | // Class Object. |
133 | ||
dbe717ef ILT |
134 | // Set the target based on fields in the ELF file header. |
135 | ||
136 | void | |
137 | Object::set_target(int machine, int size, bool big_endian, int osabi, | |
138 | int abiversion) | |
139 | { | |
140 | Target* target = select_target(machine, size, big_endian, osabi, abiversion); | |
141 | if (target == NULL) | |
75f2446e ILT |
142 | gold_fatal(_("%s: unsupported ELF machine number %d"), |
143 | this->name().c_str(), machine); | |
dbe717ef ILT |
144 | this->target_ = target; |
145 | } | |
146 | ||
75f2446e ILT |
147 | // Report an error for this object file. This is used by the |
148 | // elfcpp::Elf_file interface, and also called by the Object code | |
149 | // itself. | |
645f8123 ILT |
150 | |
151 | void | |
75f2446e | 152 | Object::error(const char* format, ...) const |
645f8123 ILT |
153 | { |
154 | va_list args; | |
645f8123 | 155 | va_start(args, format); |
75f2446e ILT |
156 | char* buf = NULL; |
157 | if (vasprintf(&buf, format, args) < 0) | |
158 | gold_nomem(); | |
645f8123 | 159 | va_end(args); |
75f2446e ILT |
160 | gold_error(_("%s: %s"), this->name().c_str(), buf); |
161 | free(buf); | |
645f8123 ILT |
162 | } |
163 | ||
164 | // Return a view of the contents of a section. | |
165 | ||
166 | const unsigned char* | |
8383303e ILT |
167 | Object::section_contents(unsigned int shndx, section_size_type* plen, |
168 | bool cache) | |
645f8123 ILT |
169 | { |
170 | Location loc(this->do_section_contents(shndx)); | |
8383303e | 171 | *plen = convert_to_section_size_type(loc.data_size); |
39d0cb0e | 172 | return this->get_view(loc.file_offset, *plen, true, cache); |
645f8123 ILT |
173 | } |
174 | ||
dbe717ef ILT |
175 | // Read the section data into SD. This is code common to Sized_relobj |
176 | // and Sized_dynobj, so we put it into Object. | |
177 | ||
178 | template<int size, bool big_endian> | |
179 | void | |
180 | Object::read_section_data(elfcpp::Elf_file<size, big_endian, Object>* elf_file, | |
181 | Read_symbols_data* sd) | |
182 | { | |
183 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
184 | ||
185 | // Read the section headers. | |
186 | const off_t shoff = elf_file->shoff(); | |
187 | const unsigned int shnum = this->shnum(); | |
39d0cb0e ILT |
188 | sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size, |
189 | true, true); | |
dbe717ef ILT |
190 | |
191 | // Read the section names. | |
192 | const unsigned char* pshdrs = sd->section_headers->data(); | |
193 | const unsigned char* pshdrnames = pshdrs + elf_file->shstrndx() * shdr_size; | |
194 | typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames); | |
195 | ||
196 | if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB) | |
75f2446e ILT |
197 | this->error(_("section name section has wrong type: %u"), |
198 | static_cast<unsigned int>(shdrnames.get_sh_type())); | |
dbe717ef | 199 | |
8383303e ILT |
200 | sd->section_names_size = |
201 | convert_to_section_size_type(shdrnames.get_sh_size()); | |
dbe717ef | 202 | sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(), |
39d0cb0e ILT |
203 | sd->section_names_size, false, |
204 | false); | |
dbe717ef ILT |
205 | } |
206 | ||
207 | // If NAME is the name of a special .gnu.warning section, arrange for | |
208 | // the warning to be issued. SHNDX is the section index. Return | |
209 | // whether it is a warning section. | |
210 | ||
211 | bool | |
212 | Object::handle_gnu_warning_section(const char* name, unsigned int shndx, | |
213 | Symbol_table* symtab) | |
214 | { | |
215 | const char warn_prefix[] = ".gnu.warning."; | |
216 | const int warn_prefix_len = sizeof warn_prefix - 1; | |
217 | if (strncmp(name, warn_prefix, warn_prefix_len) == 0) | |
218 | { | |
cb295612 ILT |
219 | // Read the section contents to get the warning text. It would |
220 | // be nicer if we only did this if we have to actually issue a | |
221 | // warning. Unfortunately, warnings are issued as we relocate | |
222 | // sections. That means that we can not lock the object then, | |
223 | // as we might try to issue the same warning multiple times | |
224 | // simultaneously. | |
225 | section_size_type len; | |
226 | const unsigned char* contents = this->section_contents(shndx, &len, | |
227 | false); | |
228 | std::string warning(reinterpret_cast<const char*>(contents), len); | |
229 | symtab->add_warning(name + warn_prefix_len, this, warning); | |
dbe717ef ILT |
230 | return true; |
231 | } | |
232 | return false; | |
233 | } | |
234 | ||
f6ce93d6 | 235 | // Class Sized_relobj. |
bae7f79e ILT |
236 | |
237 | template<int size, bool big_endian> | |
f6ce93d6 | 238 | Sized_relobj<size, big_endian>::Sized_relobj( |
bae7f79e ILT |
239 | const std::string& name, |
240 | Input_file* input_file, | |
241 | off_t offset, | |
242 | const elfcpp::Ehdr<size, big_endian>& ehdr) | |
f6ce93d6 | 243 | : Relobj(name, input_file, offset), |
645f8123 | 244 | elf_file_(this, ehdr), |
dbe717ef | 245 | symtab_shndx_(-1U), |
61ba1cf9 ILT |
246 | local_symbol_count_(0), |
247 | output_local_symbol_count_(0), | |
7bf1f802 | 248 | output_local_dynsym_count_(0), |
730cdc88 | 249 | symbols_(), |
92de84a6 | 250 | defined_count_(0), |
61ba1cf9 | 251 | local_symbol_offset_(0), |
7bf1f802 | 252 | local_dynsym_offset_(0), |
e727fa71 | 253 | local_values_(), |
730cdc88 | 254 | local_got_offsets_(), |
ef9beddf ILT |
255 | kept_comdat_sections_(), |
256 | comdat_groups_(), | |
730cdc88 | 257 | has_eh_frame_(false) |
bae7f79e | 258 | { |
bae7f79e ILT |
259 | } |
260 | ||
261 | template<int size, bool big_endian> | |
f6ce93d6 | 262 | Sized_relobj<size, big_endian>::~Sized_relobj() |
bae7f79e ILT |
263 | { |
264 | } | |
265 | ||
645f8123 | 266 | // Set up an object file based on the file header. This sets up the |
bae7f79e ILT |
267 | // target and reads the section information. |
268 | ||
269 | template<int size, bool big_endian> | |
270 | void | |
f6ce93d6 | 271 | Sized_relobj<size, big_endian>::setup( |
bae7f79e ILT |
272 | const elfcpp::Ehdr<size, big_endian>& ehdr) |
273 | { | |
dbe717ef ILT |
274 | this->set_target(ehdr.get_e_machine(), size, big_endian, |
275 | ehdr.get_e_ident()[elfcpp::EI_OSABI], | |
276 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); | |
12e14209 | 277 | |
dbe717ef | 278 | const unsigned int shnum = this->elf_file_.shnum(); |
a2fb1b05 | 279 | this->set_shnum(shnum); |
dbe717ef | 280 | } |
12e14209 | 281 | |
dbe717ef ILT |
282 | // Find the SHT_SYMTAB section, given the section headers. The ELF |
283 | // standard says that maybe in the future there can be more than one | |
284 | // SHT_SYMTAB section. Until somebody figures out how that could | |
285 | // work, we assume there is only one. | |
12e14209 | 286 | |
dbe717ef ILT |
287 | template<int size, bool big_endian> |
288 | void | |
289 | Sized_relobj<size, big_endian>::find_symtab(const unsigned char* pshdrs) | |
290 | { | |
291 | const unsigned int shnum = this->shnum(); | |
292 | this->symtab_shndx_ = 0; | |
293 | if (shnum > 0) | |
bae7f79e | 294 | { |
dbe717ef ILT |
295 | // Look through the sections in reverse order, since gas tends |
296 | // to put the symbol table at the end. | |
297 | const unsigned char* p = pshdrs + shnum * This::shdr_size; | |
298 | unsigned int i = shnum; | |
d491d34e ILT |
299 | unsigned int xindex_shndx = 0; |
300 | unsigned int xindex_link = 0; | |
dbe717ef | 301 | while (i > 0) |
bae7f79e | 302 | { |
dbe717ef ILT |
303 | --i; |
304 | p -= This::shdr_size; | |
305 | typename This::Shdr shdr(p); | |
306 | if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB) | |
307 | { | |
308 | this->symtab_shndx_ = i; | |
d491d34e ILT |
309 | if (xindex_shndx > 0 && xindex_link == i) |
310 | { | |
311 | Xindex* xindex = | |
312 | new Xindex(this->elf_file_.large_shndx_offset()); | |
313 | xindex->read_symtab_xindex<size, big_endian>(this, | |
314 | xindex_shndx, | |
315 | pshdrs); | |
316 | this->set_xindex(xindex); | |
317 | } | |
dbe717ef ILT |
318 | break; |
319 | } | |
d491d34e ILT |
320 | |
321 | // Try to pick up the SHT_SYMTAB_SHNDX section, if there is | |
322 | // one. This will work if it follows the SHT_SYMTAB | |
323 | // section. | |
324 | if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB_SHNDX) | |
325 | { | |
326 | xindex_shndx = i; | |
327 | xindex_link = this->adjust_shndx(shdr.get_sh_link()); | |
328 | } | |
bae7f79e | 329 | } |
bae7f79e ILT |
330 | } |
331 | } | |
332 | ||
d491d34e ILT |
333 | // Return the Xindex structure to use for object with lots of |
334 | // sections. | |
335 | ||
336 | template<int size, bool big_endian> | |
337 | Xindex* | |
338 | Sized_relobj<size, big_endian>::do_initialize_xindex() | |
339 | { | |
340 | gold_assert(this->symtab_shndx_ != -1U); | |
341 | Xindex* xindex = new Xindex(this->elf_file_.large_shndx_offset()); | |
342 | xindex->initialize_symtab_xindex<size, big_endian>(this, this->symtab_shndx_); | |
343 | return xindex; | |
344 | } | |
345 | ||
730cdc88 ILT |
346 | // Return whether SHDR has the right type and flags to be a GNU |
347 | // .eh_frame section. | |
348 | ||
349 | template<int size, bool big_endian> | |
350 | bool | |
351 | Sized_relobj<size, big_endian>::check_eh_frame_flags( | |
352 | const elfcpp::Shdr<size, big_endian>* shdr) const | |
353 | { | |
2c38906f | 354 | return (shdr->get_sh_type() == elfcpp::SHT_PROGBITS |
1650c4ff | 355 | && (shdr->get_sh_flags() & elfcpp::SHF_ALLOC) != 0); |
730cdc88 ILT |
356 | } |
357 | ||
358 | // Return whether there is a GNU .eh_frame section, given the section | |
359 | // headers and the section names. | |
360 | ||
361 | template<int size, bool big_endian> | |
362 | bool | |
8383303e ILT |
363 | Sized_relobj<size, big_endian>::find_eh_frame( |
364 | const unsigned char* pshdrs, | |
365 | const char* names, | |
366 | section_size_type names_size) const | |
730cdc88 ILT |
367 | { |
368 | const unsigned int shnum = this->shnum(); | |
369 | const unsigned char* p = pshdrs + This::shdr_size; | |
370 | for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size) | |
371 | { | |
372 | typename This::Shdr shdr(p); | |
373 | if (this->check_eh_frame_flags(&shdr)) | |
374 | { | |
375 | if (shdr.get_sh_name() >= names_size) | |
376 | { | |
377 | this->error(_("bad section name offset for section %u: %lu"), | |
378 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
379 | continue; | |
380 | } | |
381 | ||
382 | const char* name = names + shdr.get_sh_name(); | |
383 | if (strcmp(name, ".eh_frame") == 0) | |
384 | return true; | |
385 | } | |
386 | } | |
387 | return false; | |
388 | } | |
389 | ||
12e14209 | 390 | // Read the sections and symbols from an object file. |
bae7f79e ILT |
391 | |
392 | template<int size, bool big_endian> | |
12e14209 | 393 | void |
f6ce93d6 | 394 | Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) |
bae7f79e | 395 | { |
dbe717ef | 396 | this->read_section_data(&this->elf_file_, sd); |
12e14209 | 397 | |
dbe717ef ILT |
398 | const unsigned char* const pshdrs = sd->section_headers->data(); |
399 | ||
400 | this->find_symtab(pshdrs); | |
12e14209 | 401 | |
730cdc88 ILT |
402 | const unsigned char* namesu = sd->section_names->data(); |
403 | const char* names = reinterpret_cast<const char*>(namesu); | |
1650c4ff ILT |
404 | if (memmem(names, sd->section_names_size, ".eh_frame", 10) != NULL) |
405 | { | |
406 | if (this->find_eh_frame(pshdrs, names, sd->section_names_size)) | |
407 | this->has_eh_frame_ = true; | |
408 | } | |
730cdc88 | 409 | |
75f2446e ILT |
410 | sd->symbols = NULL; |
411 | sd->symbols_size = 0; | |
730cdc88 | 412 | sd->external_symbols_offset = 0; |
75f2446e ILT |
413 | sd->symbol_names = NULL; |
414 | sd->symbol_names_size = 0; | |
415 | ||
645f8123 | 416 | if (this->symtab_shndx_ == 0) |
bae7f79e ILT |
417 | { |
418 | // No symbol table. Weird but legal. | |
12e14209 | 419 | return; |
bae7f79e ILT |
420 | } |
421 | ||
12e14209 ILT |
422 | // Get the symbol table section header. |
423 | typename This::Shdr symtabshdr(pshdrs | |
645f8123 | 424 | + this->symtab_shndx_ * This::shdr_size); |
a3ad94ed | 425 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
bae7f79e | 426 | |
730cdc88 ILT |
427 | // If this object has a .eh_frame section, we need all the symbols. |
428 | // Otherwise we only need the external symbols. While it would be | |
429 | // simpler to just always read all the symbols, I've seen object | |
430 | // files with well over 2000 local symbols, which for a 64-bit | |
431 | // object file format is over 5 pages that we don't need to read | |
432 | // now. | |
433 | ||
75f65a3e | 434 | const int sym_size = This::sym_size; |
92e059d8 ILT |
435 | const unsigned int loccount = symtabshdr.get_sh_info(); |
436 | this->local_symbol_count_ = loccount; | |
7bf1f802 | 437 | this->local_values_.resize(loccount); |
8383303e | 438 | section_offset_type locsize = loccount * sym_size; |
730cdc88 | 439 | off_t dataoff = symtabshdr.get_sh_offset(); |
8383303e ILT |
440 | section_size_type datasize = |
441 | convert_to_section_size_type(symtabshdr.get_sh_size()); | |
730cdc88 | 442 | off_t extoff = dataoff + locsize; |
8383303e | 443 | section_size_type extsize = datasize - locsize; |
75f65a3e | 444 | |
730cdc88 | 445 | off_t readoff = this->has_eh_frame_ ? dataoff : extoff; |
8383303e | 446 | section_size_type readsize = this->has_eh_frame_ ? datasize : extsize; |
730cdc88 | 447 | |
3f2e6a2d CC |
448 | if (readsize == 0) |
449 | { | |
450 | // No external symbols. Also weird but also legal. | |
451 | return; | |
452 | } | |
453 | ||
39d0cb0e | 454 | File_view* fvsymtab = this->get_lasting_view(readoff, readsize, true, false); |
bae7f79e ILT |
455 | |
456 | // Read the section header for the symbol names. | |
d491d34e | 457 | unsigned int strtab_shndx = this->adjust_shndx(symtabshdr.get_sh_link()); |
dbe717ef | 458 | if (strtab_shndx >= this->shnum()) |
bae7f79e | 459 | { |
75f2446e ILT |
460 | this->error(_("invalid symbol table name index: %u"), strtab_shndx); |
461 | return; | |
bae7f79e | 462 | } |
dbe717ef | 463 | typename This::Shdr strtabshdr(pshdrs + strtab_shndx * This::shdr_size); |
bae7f79e ILT |
464 | if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB) |
465 | { | |
75f2446e ILT |
466 | this->error(_("symbol table name section has wrong type: %u"), |
467 | static_cast<unsigned int>(strtabshdr.get_sh_type())); | |
468 | return; | |
bae7f79e ILT |
469 | } |
470 | ||
471 | // Read the symbol names. | |
472 | File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(), | |
39d0cb0e ILT |
473 | strtabshdr.get_sh_size(), |
474 | false, true); | |
bae7f79e | 475 | |
12e14209 | 476 | sd->symbols = fvsymtab; |
730cdc88 ILT |
477 | sd->symbols_size = readsize; |
478 | sd->external_symbols_offset = this->has_eh_frame_ ? locsize : 0; | |
12e14209 | 479 | sd->symbol_names = fvstrtab; |
8383303e ILT |
480 | sd->symbol_names_size = |
481 | convert_to_section_size_type(strtabshdr.get_sh_size()); | |
a2fb1b05 ILT |
482 | } |
483 | ||
730cdc88 | 484 | // Return the section index of symbol SYM. Set *VALUE to its value in |
d491d34e ILT |
485 | // the object file. Set *IS_ORDINARY if this is an ordinary section |
486 | // index. not a special cod between SHN_LORESERVE and SHN_HIRESERVE. | |
487 | // Note that for a symbol which is not defined in this object file, | |
488 | // this will set *VALUE to 0 and return SHN_UNDEF; it will not return | |
489 | // the final value of the symbol in the link. | |
730cdc88 ILT |
490 | |
491 | template<int size, bool big_endian> | |
492 | unsigned int | |
493 | Sized_relobj<size, big_endian>::symbol_section_and_value(unsigned int sym, | |
d491d34e ILT |
494 | Address* value, |
495 | bool* is_ordinary) | |
730cdc88 | 496 | { |
8383303e | 497 | section_size_type symbols_size; |
730cdc88 ILT |
498 | const unsigned char* symbols = this->section_contents(this->symtab_shndx_, |
499 | &symbols_size, | |
500 | false); | |
501 | ||
502 | const size_t count = symbols_size / This::sym_size; | |
503 | gold_assert(sym < count); | |
504 | ||
505 | elfcpp::Sym<size, big_endian> elfsym(symbols + sym * This::sym_size); | |
506 | *value = elfsym.get_st_value(); | |
d491d34e ILT |
507 | |
508 | return this->adjust_sym_shndx(sym, elfsym.get_st_shndx(), is_ordinary); | |
730cdc88 ILT |
509 | } |
510 | ||
a2fb1b05 ILT |
511 | // Return whether to include a section group in the link. LAYOUT is |
512 | // used to keep track of which section groups we have already seen. | |
513 | // INDEX is the index of the section group and SHDR is the section | |
514 | // header. If we do not want to include this group, we set bits in | |
515 | // OMIT for each section which should be discarded. | |
516 | ||
517 | template<int size, bool big_endian> | |
518 | bool | |
f6ce93d6 | 519 | Sized_relobj<size, big_endian>::include_section_group( |
6a74a719 | 520 | Symbol_table* symtab, |
a2fb1b05 ILT |
521 | Layout* layout, |
522 | unsigned int index, | |
6a74a719 | 523 | const char* name, |
e94cf127 CC |
524 | const unsigned char* shdrs, |
525 | const char* section_names, | |
526 | section_size_type section_names_size, | |
a2fb1b05 ILT |
527 | std::vector<bool>* omit) |
528 | { | |
529 | // Read the section contents. | |
e94cf127 | 530 | typename This::Shdr shdr(shdrs + index * This::shdr_size); |
a2fb1b05 | 531 | const unsigned char* pcon = this->get_view(shdr.get_sh_offset(), |
39d0cb0e | 532 | shdr.get_sh_size(), true, false); |
a2fb1b05 ILT |
533 | const elfcpp::Elf_Word* pword = |
534 | reinterpret_cast<const elfcpp::Elf_Word*>(pcon); | |
535 | ||
536 | // The first word contains flags. We only care about COMDAT section | |
537 | // groups. Other section groups are always included in the link | |
538 | // just like ordinary sections. | |
f6ce93d6 | 539 | elfcpp::Elf_Word flags = elfcpp::Swap<32, big_endian>::readval(pword); |
a2fb1b05 ILT |
540 | |
541 | // Look up the group signature, which is the name of a symbol. This | |
542 | // is a lot of effort to go to to read a string. Why didn't they | |
6a74a719 ILT |
543 | // just have the group signature point into the string table, rather |
544 | // than indirect through a symbol? | |
a2fb1b05 ILT |
545 | |
546 | // Get the appropriate symbol table header (this will normally be | |
547 | // the single SHT_SYMTAB section, but in principle it need not be). | |
d491d34e | 548 | const unsigned int link = this->adjust_shndx(shdr.get_sh_link()); |
645f8123 | 549 | typename This::Shdr symshdr(this, this->elf_file_.section_header(link)); |
a2fb1b05 ILT |
550 | |
551 | // Read the symbol table entry. | |
d491d34e ILT |
552 | unsigned int symndx = shdr.get_sh_info(); |
553 | if (symndx >= symshdr.get_sh_size() / This::sym_size) | |
a2fb1b05 | 554 | { |
75f2446e | 555 | this->error(_("section group %u info %u out of range"), |
d491d34e | 556 | index, symndx); |
75f2446e | 557 | return false; |
a2fb1b05 | 558 | } |
d491d34e | 559 | off_t symoff = symshdr.get_sh_offset() + symndx * This::sym_size; |
39d0cb0e ILT |
560 | const unsigned char* psym = this->get_view(symoff, This::sym_size, true, |
561 | false); | |
a2fb1b05 ILT |
562 | elfcpp::Sym<size, big_endian> sym(psym); |
563 | ||
a2fb1b05 | 564 | // Read the symbol table names. |
8383303e | 565 | section_size_type symnamelen; |
645f8123 | 566 | const unsigned char* psymnamesu; |
d491d34e ILT |
567 | psymnamesu = this->section_contents(this->adjust_shndx(symshdr.get_sh_link()), |
568 | &symnamelen, true); | |
a2fb1b05 ILT |
569 | const char* psymnames = reinterpret_cast<const char*>(psymnamesu); |
570 | ||
571 | // Get the section group signature. | |
645f8123 | 572 | if (sym.get_st_name() >= symnamelen) |
a2fb1b05 | 573 | { |
75f2446e | 574 | this->error(_("symbol %u name offset %u out of range"), |
d491d34e | 575 | symndx, sym.get_st_name()); |
75f2446e | 576 | return false; |
a2fb1b05 ILT |
577 | } |
578 | ||
e94cf127 | 579 | std::string signature(psymnames + sym.get_st_name()); |
a2fb1b05 | 580 | |
ead1e424 ILT |
581 | // It seems that some versions of gas will create a section group |
582 | // associated with a section symbol, and then fail to give a name to | |
583 | // the section symbol. In such a case, use the name of the section. | |
645f8123 | 584 | if (signature[0] == '\0' && sym.get_st_type() == elfcpp::STT_SECTION) |
ead1e424 | 585 | { |
d491d34e ILT |
586 | bool is_ordinary; |
587 | unsigned int sym_shndx = this->adjust_sym_shndx(symndx, | |
588 | sym.get_st_shndx(), | |
589 | &is_ordinary); | |
590 | if (!is_ordinary || sym_shndx >= this->shnum()) | |
591 | { | |
592 | this->error(_("symbol %u invalid section index %u"), | |
593 | symndx, sym_shndx); | |
594 | return false; | |
595 | } | |
e94cf127 CC |
596 | typename This::Shdr member_shdr(shdrs + sym_shndx * This::shdr_size); |
597 | if (member_shdr.get_sh_name() < section_names_size) | |
598 | signature = section_names + member_shdr.get_sh_name(); | |
ead1e424 ILT |
599 | } |
600 | ||
e94cf127 CC |
601 | // Record this section group in the layout, and see whether we've already |
602 | // seen one with the same signature. | |
603 | bool include_group = ((flags & elfcpp::GRP_COMDAT) == 0 | |
604 | || layout->add_comdat(this, index, signature, true)); | |
605 | ||
ef9beddf | 606 | Sized_relobj<size, big_endian>* kept_object = NULL; |
e94cf127 | 607 | Comdat_group* kept_group = NULL; |
6a74a719 | 608 | |
e94cf127 | 609 | if (!include_group) |
6a74a719 | 610 | { |
e94cf127 CC |
611 | // This group is being discarded. Find the object and group |
612 | // that was kept in its place. | |
613 | unsigned int kept_group_index = 0; | |
ef9beddf ILT |
614 | Relobj* kept_relobj = layout->find_kept_object(signature, |
615 | &kept_group_index); | |
616 | kept_object = static_cast<Sized_relobj<size, big_endian>*>(kept_relobj); | |
e94cf127 CC |
617 | if (kept_object != NULL) |
618 | kept_group = kept_object->find_comdat_group(kept_group_index); | |
619 | } | |
620 | else if (flags & elfcpp::GRP_COMDAT) | |
621 | { | |
622 | // This group is being kept. Create the table to map section names | |
623 | // to section indexes and add it to the table of groups. | |
624 | kept_group = new Comdat_group(); | |
625 | this->add_comdat_group(index, kept_group); | |
6a74a719 | 626 | } |
a2fb1b05 | 627 | |
a2fb1b05 | 628 | size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word); |
8825ac63 ILT |
629 | |
630 | std::vector<unsigned int> shndxes; | |
631 | bool relocate_group = include_group && parameters->options().relocatable(); | |
632 | if (relocate_group) | |
633 | shndxes.reserve(count - 1); | |
634 | ||
a2fb1b05 ILT |
635 | for (size_t i = 1; i < count; ++i) |
636 | { | |
f6ce93d6 | 637 | elfcpp::Elf_Word secnum = |
8825ac63 ILT |
638 | this->adjust_shndx(elfcpp::Swap<32, big_endian>::readval(pword + i)); |
639 | ||
640 | if (relocate_group) | |
641 | shndxes.push_back(secnum); | |
642 | ||
a2fb1b05 ILT |
643 | if (secnum >= this->shnum()) |
644 | { | |
75f2446e ILT |
645 | this->error(_("section %u in section group %u out of range"), |
646 | secnum, index); | |
647 | continue; | |
a2fb1b05 | 648 | } |
55438702 ILT |
649 | |
650 | // Check for an earlier section number, since we're going to get | |
651 | // it wrong--we may have already decided to include the section. | |
652 | if (secnum < index) | |
653 | this->error(_("invalid section group %u refers to earlier section %u"), | |
654 | index, secnum); | |
655 | ||
e94cf127 CC |
656 | // Get the name of the member section. |
657 | typename This::Shdr member_shdr(shdrs + secnum * This::shdr_size); | |
658 | if (member_shdr.get_sh_name() >= section_names_size) | |
659 | { | |
660 | // This is an error, but it will be diagnosed eventually | |
661 | // in do_layout, so we don't need to do anything here but | |
662 | // ignore it. | |
663 | continue; | |
664 | } | |
665 | std::string mname(section_names + member_shdr.get_sh_name()); | |
666 | ||
667 | if (!include_group) | |
668 | { | |
669 | (*omit)[secnum] = true; | |
670 | if (kept_group != NULL) | |
671 | { | |
672 | // Find the corresponding kept section, and store that info | |
673 | // in the discarded section table. | |
674 | Comdat_group::const_iterator p = kept_group->find(mname); | |
675 | if (p != kept_group->end()) | |
676 | { | |
677 | Kept_comdat_section* kept = | |
678 | new Kept_comdat_section(kept_object, p->second); | |
679 | this->set_kept_comdat_section(secnum, kept); | |
680 | } | |
681 | } | |
682 | } | |
683 | else if (flags & elfcpp::GRP_COMDAT) | |
684 | { | |
685 | // Add the section to the kept group table. | |
686 | gold_assert(kept_group != NULL); | |
687 | kept_group->insert(std::make_pair(mname, secnum)); | |
688 | } | |
a2fb1b05 ILT |
689 | } |
690 | ||
8825ac63 ILT |
691 | if (relocate_group) |
692 | layout->layout_group(symtab, this, index, name, signature.c_str(), | |
693 | shdr, flags, &shndxes); | |
694 | ||
e94cf127 | 695 | return include_group; |
a2fb1b05 ILT |
696 | } |
697 | ||
698 | // Whether to include a linkonce section in the link. NAME is the | |
699 | // name of the section and SHDR is the section header. | |
700 | ||
701 | // Linkonce sections are a GNU extension implemented in the original | |
702 | // GNU linker before section groups were defined. The semantics are | |
703 | // that we only include one linkonce section with a given name. The | |
704 | // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME, | |
705 | // where T is the type of section and SYMNAME is the name of a symbol. | |
706 | // In an attempt to make linkonce sections interact well with section | |
707 | // groups, we try to identify SYMNAME and use it like a section group | |
708 | // signature. We want to block section groups with that signature, | |
709 | // but not other linkonce sections with that signature. We also use | |
710 | // the full name of the linkonce section as a normal section group | |
711 | // signature. | |
712 | ||
713 | template<int size, bool big_endian> | |
714 | bool | |
f6ce93d6 | 715 | Sized_relobj<size, big_endian>::include_linkonce_section( |
a2fb1b05 | 716 | Layout* layout, |
e94cf127 | 717 | unsigned int index, |
a2fb1b05 ILT |
718 | const char* name, |
719 | const elfcpp::Shdr<size, big_endian>&) | |
720 | { | |
ad435a24 ILT |
721 | // In general the symbol name we want will be the string following |
722 | // the last '.'. However, we have to handle the case of | |
723 | // .gnu.linkonce.t.__i686.get_pc_thunk.bx, which was generated by | |
724 | // some versions of gcc. So we use a heuristic: if the name starts | |
725 | // with ".gnu.linkonce.t.", we use everything after that. Otherwise | |
726 | // we look for the last '.'. We can't always simply skip | |
727 | // ".gnu.linkonce.X", because we have to deal with cases like | |
728 | // ".gnu.linkonce.d.rel.ro.local". | |
729 | const char* const linkonce_t = ".gnu.linkonce.t."; | |
730 | const char* symname; | |
731 | if (strncmp(name, linkonce_t, strlen(linkonce_t)) == 0) | |
732 | symname = name + strlen(linkonce_t); | |
733 | else | |
734 | symname = strrchr(name, '.') + 1; | |
e94cf127 CC |
735 | std::string sig1(symname); |
736 | std::string sig2(name); | |
737 | bool include1 = layout->add_comdat(this, index, sig1, false); | |
738 | bool include2 = layout->add_comdat(this, index, sig2, true); | |
739 | ||
740 | if (!include2) | |
741 | { | |
742 | // The section is being discarded on the basis of its section | |
743 | // name (i.e., the kept section was also a linkonce section). | |
744 | // In this case, the section index stored with the layout object | |
745 | // is the linkonce section that was kept. | |
746 | unsigned int kept_group_index = 0; | |
ef9beddf ILT |
747 | Relobj* kept_relobj = layout->find_kept_object(sig2, &kept_group_index); |
748 | if (kept_relobj != NULL) | |
e94cf127 | 749 | { |
ef9beddf ILT |
750 | Sized_relobj<size, big_endian>* kept_object |
751 | = static_cast<Sized_relobj<size, big_endian>*>(kept_relobj); | |
e94cf127 CC |
752 | Kept_comdat_section* kept = |
753 | new Kept_comdat_section(kept_object, kept_group_index); | |
754 | this->set_kept_comdat_section(index, kept); | |
755 | } | |
756 | } | |
757 | else if (!include1) | |
758 | { | |
759 | // The section is being discarded on the basis of its symbol | |
760 | // name. This means that the corresponding kept section was | |
761 | // part of a comdat group, and it will be difficult to identify | |
762 | // the specific section within that group that corresponds to | |
763 | // this linkonce section. We'll handle the simple case where | |
764 | // the group has only one member section. Otherwise, it's not | |
765 | // worth the effort. | |
766 | unsigned int kept_group_index = 0; | |
ef9beddf ILT |
767 | Relobj* kept_relobj = layout->find_kept_object(sig1, &kept_group_index); |
768 | if (kept_relobj != NULL) | |
e94cf127 | 769 | { |
ef9beddf ILT |
770 | Sized_relobj<size, big_endian>* kept_object = |
771 | static_cast<Sized_relobj<size, big_endian>*>(kept_relobj); | |
e94cf127 CC |
772 | Comdat_group* kept_group = |
773 | kept_object->find_comdat_group(kept_group_index); | |
774 | if (kept_group != NULL && kept_group->size() == 1) | |
775 | { | |
776 | Comdat_group::const_iterator p = kept_group->begin(); | |
777 | gold_assert(p != kept_group->end()); | |
778 | Kept_comdat_section* kept = | |
779 | new Kept_comdat_section(kept_object, p->second); | |
780 | this->set_kept_comdat_section(index, kept); | |
781 | } | |
782 | } | |
783 | } | |
784 | ||
a783673b | 785 | return include1 && include2; |
a2fb1b05 ILT |
786 | } |
787 | ||
5995b570 CC |
788 | // Layout an input section. |
789 | ||
790 | template<int size, bool big_endian> | |
791 | inline void | |
792 | Sized_relobj<size, big_endian>::layout_section(Layout* layout, | |
793 | unsigned int shndx, | |
794 | const char* name, | |
795 | typename This::Shdr& shdr, | |
796 | unsigned int reloc_shndx, | |
797 | unsigned int reloc_type) | |
798 | { | |
799 | off_t offset; | |
800 | Output_section* os = layout->layout(this, shndx, name, shdr, | |
801 | reloc_shndx, reloc_type, &offset); | |
802 | ||
803 | this->output_sections()[shndx] = os; | |
804 | if (offset == -1) | |
805 | this->section_offsets_[shndx] = invalid_address; | |
806 | else | |
807 | this->section_offsets_[shndx] = convert_types<Address, off_t>(offset); | |
808 | ||
809 | // If this section requires special handling, and if there are | |
810 | // relocs that apply to it, then we must do the special handling | |
811 | // before we apply the relocs. | |
812 | if (offset == -1 && reloc_shndx != 0) | |
813 | this->set_relocs_must_follow_section_writes(); | |
814 | } | |
815 | ||
a2fb1b05 ILT |
816 | // Lay out the input sections. We walk through the sections and check |
817 | // whether they should be included in the link. If they should, we | |
818 | // pass them to the Layout object, which will return an output section | |
819 | // and an offset. | |
820 | ||
821 | template<int size, bool big_endian> | |
822 | void | |
7e1edb90 | 823 | Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab, |
f6ce93d6 | 824 | Layout* layout, |
12e14209 | 825 | Read_symbols_data* sd) |
a2fb1b05 | 826 | { |
dbe717ef | 827 | const unsigned int shnum = this->shnum(); |
12e14209 ILT |
828 | if (shnum == 0) |
829 | return; | |
a2fb1b05 ILT |
830 | |
831 | // Get the section headers. | |
e94cf127 CC |
832 | const unsigned char* shdrs = sd->section_headers->data(); |
833 | const unsigned char* pshdrs; | |
a2fb1b05 ILT |
834 | |
835 | // Get the section names. | |
12e14209 | 836 | const unsigned char* pnamesu = sd->section_names->data(); |
a2fb1b05 ILT |
837 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
838 | ||
5995b570 CC |
839 | // If any input files have been claimed by plugins, we need to defer |
840 | // actual layout until the replacement files have arrived. | |
841 | const bool should_defer_layout = | |
842 | (parameters->options().has_plugins() | |
843 | && parameters->options().plugins()->should_defer_layout()); | |
844 | unsigned int num_sections_to_defer = 0; | |
845 | ||
730cdc88 ILT |
846 | // For each section, record the index of the reloc section if any. |
847 | // Use 0 to mean that there is no reloc section, -1U to mean that | |
848 | // there is more than one. | |
849 | std::vector<unsigned int> reloc_shndx(shnum, 0); | |
850 | std::vector<unsigned int> reloc_type(shnum, elfcpp::SHT_NULL); | |
851 | // Skip the first, dummy, section. | |
e94cf127 | 852 | pshdrs = shdrs + This::shdr_size; |
730cdc88 ILT |
853 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) |
854 | { | |
855 | typename This::Shdr shdr(pshdrs); | |
856 | ||
5995b570 CC |
857 | // Count the number of sections whose layout will be deferred. |
858 | if (should_defer_layout && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC)) | |
859 | ++num_sections_to_defer; | |
860 | ||
730cdc88 ILT |
861 | unsigned int sh_type = shdr.get_sh_type(); |
862 | if (sh_type == elfcpp::SHT_REL || sh_type == elfcpp::SHT_RELA) | |
863 | { | |
d491d34e | 864 | unsigned int target_shndx = this->adjust_shndx(shdr.get_sh_info()); |
730cdc88 ILT |
865 | if (target_shndx == 0 || target_shndx >= shnum) |
866 | { | |
867 | this->error(_("relocation section %u has bad info %u"), | |
868 | i, target_shndx); | |
869 | continue; | |
870 | } | |
871 | ||
872 | if (reloc_shndx[target_shndx] != 0) | |
873 | reloc_shndx[target_shndx] = -1U; | |
874 | else | |
875 | { | |
876 | reloc_shndx[target_shndx] = i; | |
877 | reloc_type[target_shndx] = sh_type; | |
878 | } | |
879 | } | |
880 | } | |
881 | ||
ef9beddf ILT |
882 | Output_sections& out_sections(this->output_sections()); |
883 | std::vector<Address>& out_section_offsets(this->section_offsets_); | |
884 | ||
885 | out_sections.resize(shnum); | |
886 | out_section_offsets.resize(shnum); | |
a2fb1b05 | 887 | |
88dd47ac ILT |
888 | // If we are only linking for symbols, then there is nothing else to |
889 | // do here. | |
890 | if (this->input_file()->just_symbols()) | |
891 | { | |
892 | delete sd->section_headers; | |
893 | sd->section_headers = NULL; | |
894 | delete sd->section_names; | |
895 | sd->section_names = NULL; | |
896 | return; | |
897 | } | |
898 | ||
5995b570 CC |
899 | if (num_sections_to_defer > 0) |
900 | { | |
901 | parameters->options().plugins()->add_deferred_layout_object(this); | |
902 | this->deferred_layout_.reserve(num_sections_to_defer); | |
903 | } | |
904 | ||
35cdfc9a ILT |
905 | // Whether we've seen a .note.GNU-stack section. |
906 | bool seen_gnu_stack = false; | |
907 | // The flags of a .note.GNU-stack section. | |
908 | uint64_t gnu_stack_flags = 0; | |
909 | ||
a2fb1b05 ILT |
910 | // Keep track of which sections to omit. |
911 | std::vector<bool> omit(shnum, false); | |
912 | ||
7019cd25 | 913 | // Keep track of reloc sections when emitting relocations. |
8851ecca ILT |
914 | const bool relocatable = parameters->options().relocatable(); |
915 | const bool emit_relocs = (relocatable | |
916 | || parameters->options().emit_relocs()); | |
6a74a719 ILT |
917 | std::vector<unsigned int> reloc_sections; |
918 | ||
730cdc88 ILT |
919 | // Keep track of .eh_frame sections. |
920 | std::vector<unsigned int> eh_frame_sections; | |
921 | ||
f6ce93d6 | 922 | // Skip the first, dummy, section. |
e94cf127 | 923 | pshdrs = shdrs + This::shdr_size; |
f6ce93d6 | 924 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) |
a2fb1b05 | 925 | { |
75f65a3e | 926 | typename This::Shdr shdr(pshdrs); |
a2fb1b05 | 927 | |
12e14209 | 928 | if (shdr.get_sh_name() >= sd->section_names_size) |
a2fb1b05 | 929 | { |
75f2446e ILT |
930 | this->error(_("bad section name offset for section %u: %lu"), |
931 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
932 | return; | |
a2fb1b05 ILT |
933 | } |
934 | ||
935 | const char* name = pnames + shdr.get_sh_name(); | |
936 | ||
dbe717ef | 937 | if (this->handle_gnu_warning_section(name, i, symtab)) |
f6ce93d6 | 938 | { |
8851ecca | 939 | if (!relocatable) |
f6ce93d6 ILT |
940 | omit[i] = true; |
941 | } | |
942 | ||
35cdfc9a ILT |
943 | // The .note.GNU-stack section is special. It gives the |
944 | // protection flags that this object file requires for the stack | |
945 | // in memory. | |
946 | if (strcmp(name, ".note.GNU-stack") == 0) | |
947 | { | |
948 | seen_gnu_stack = true; | |
949 | gnu_stack_flags |= shdr.get_sh_flags(); | |
950 | omit[i] = true; | |
951 | } | |
952 | ||
a2fb1b05 ILT |
953 | bool discard = omit[i]; |
954 | if (!discard) | |
955 | { | |
956 | if (shdr.get_sh_type() == elfcpp::SHT_GROUP) | |
957 | { | |
e94cf127 CC |
958 | if (!this->include_section_group(symtab, layout, i, name, shdrs, |
959 | pnames, sd->section_names_size, | |
6a74a719 | 960 | &omit)) |
a2fb1b05 ILT |
961 | discard = true; |
962 | } | |
cba134d6 ILT |
963 | else if ((shdr.get_sh_flags() & elfcpp::SHF_GROUP) == 0 |
964 | && Layout::is_linkonce(name)) | |
a2fb1b05 | 965 | { |
e94cf127 | 966 | if (!this->include_linkonce_section(layout, i, name, shdr)) |
a2fb1b05 ILT |
967 | discard = true; |
968 | } | |
969 | } | |
970 | ||
971 | if (discard) | |
972 | { | |
973 | // Do not include this section in the link. | |
ef9beddf | 974 | out_sections[i] = NULL; |
eff45813 | 975 | out_section_offsets[i] = invalid_address; |
a2fb1b05 ILT |
976 | continue; |
977 | } | |
978 | ||
6a74a719 ILT |
979 | // When doing a relocatable link we are going to copy input |
980 | // reloc sections into the output. We only want to copy the | |
981 | // ones associated with sections which are not being discarded. | |
982 | // However, we don't know that yet for all sections. So save | |
983 | // reloc sections and process them later. | |
7019cd25 | 984 | if (emit_relocs |
6a74a719 ILT |
985 | && (shdr.get_sh_type() == elfcpp::SHT_REL |
986 | || shdr.get_sh_type() == elfcpp::SHT_RELA)) | |
987 | { | |
988 | reloc_sections.push_back(i); | |
989 | continue; | |
990 | } | |
991 | ||
8851ecca | 992 | if (relocatable && shdr.get_sh_type() == elfcpp::SHT_GROUP) |
6a74a719 ILT |
993 | continue; |
994 | ||
730cdc88 ILT |
995 | // The .eh_frame section is special. It holds exception frame |
996 | // information that we need to read in order to generate the | |
997 | // exception frame header. We process these after all the other | |
998 | // sections so that the exception frame reader can reliably | |
999 | // determine which sections are being discarded, and discard the | |
1000 | // corresponding information. | |
8851ecca | 1001 | if (!relocatable |
730cdc88 ILT |
1002 | && strcmp(name, ".eh_frame") == 0 |
1003 | && this->check_eh_frame_flags(&shdr)) | |
1004 | { | |
1005 | eh_frame_sections.push_back(i); | |
1006 | continue; | |
1007 | } | |
1008 | ||
5995b570 CC |
1009 | if (should_defer_layout && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC)) |
1010 | { | |
1011 | this->deferred_layout_.push_back(Deferred_layout(i, name, pshdrs, | |
1012 | reloc_shndx[i], | |
1013 | reloc_type[i])); | |
a2fb1b05 | 1014 | |
5995b570 CC |
1015 | // Put dummy values here; real values will be supplied by |
1016 | // do_layout_deferred_sections. | |
1017 | out_sections[i] = reinterpret_cast<Output_section*>(1); | |
1018 | out_section_offsets[i] = invalid_address; | |
1019 | } | |
ef9beddf | 1020 | else |
5995b570 CC |
1021 | { |
1022 | this->layout_section(layout, i, name, shdr, reloc_shndx[i], | |
1023 | reloc_type[i]); | |
1024 | } | |
12e14209 ILT |
1025 | } |
1026 | ||
35cdfc9a ILT |
1027 | layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags); |
1028 | ||
6a74a719 ILT |
1029 | // When doing a relocatable link handle the reloc sections at the |
1030 | // end. | |
7019cd25 | 1031 | if (emit_relocs) |
6a74a719 ILT |
1032 | this->size_relocatable_relocs(); |
1033 | for (std::vector<unsigned int>::const_iterator p = reloc_sections.begin(); | |
1034 | p != reloc_sections.end(); | |
1035 | ++p) | |
1036 | { | |
1037 | unsigned int i = *p; | |
1038 | const unsigned char* pshdr; | |
1039 | pshdr = sd->section_headers->data() + i * This::shdr_size; | |
1040 | typename This::Shdr shdr(pshdr); | |
1041 | ||
d491d34e | 1042 | unsigned int data_shndx = this->adjust_shndx(shdr.get_sh_info()); |
6a74a719 ILT |
1043 | if (data_shndx >= shnum) |
1044 | { | |
1045 | // We already warned about this above. | |
1046 | continue; | |
1047 | } | |
1048 | ||
ef9beddf | 1049 | Output_section* data_section = out_sections[data_shndx]; |
6a74a719 ILT |
1050 | if (data_section == NULL) |
1051 | { | |
ef9beddf | 1052 | out_sections[i] = NULL; |
eff45813 | 1053 | out_section_offsets[i] = invalid_address; |
6a74a719 ILT |
1054 | continue; |
1055 | } | |
1056 | ||
1057 | Relocatable_relocs* rr = new Relocatable_relocs(); | |
1058 | this->set_relocatable_relocs(i, rr); | |
1059 | ||
1060 | Output_section* os = layout->layout_reloc(this, i, shdr, data_section, | |
1061 | rr); | |
ef9beddf | 1062 | out_sections[i] = os; |
eff45813 | 1063 | out_section_offsets[i] = invalid_address; |
6a74a719 ILT |
1064 | } |
1065 | ||
730cdc88 ILT |
1066 | // Handle the .eh_frame sections at the end. |
1067 | for (std::vector<unsigned int>::const_iterator p = eh_frame_sections.begin(); | |
1068 | p != eh_frame_sections.end(); | |
1069 | ++p) | |
1070 | { | |
1071 | gold_assert(this->has_eh_frame_); | |
1072 | gold_assert(sd->external_symbols_offset != 0); | |
1073 | ||
1074 | unsigned int i = *p; | |
1075 | const unsigned char *pshdr; | |
1076 | pshdr = sd->section_headers->data() + i * This::shdr_size; | |
1077 | typename This::Shdr shdr(pshdr); | |
1078 | ||
1079 | off_t offset; | |
1080 | Output_section* os = layout->layout_eh_frame(this, | |
1081 | sd->symbols->data(), | |
1082 | sd->symbols_size, | |
1083 | sd->symbol_names->data(), | |
1084 | sd->symbol_names_size, | |
1085 | i, shdr, | |
1086 | reloc_shndx[i], | |
1087 | reloc_type[i], | |
1088 | &offset); | |
ef9beddf ILT |
1089 | out_sections[i] = os; |
1090 | if (offset == -1) | |
eff45813 | 1091 | out_section_offsets[i] = invalid_address; |
ef9beddf ILT |
1092 | else |
1093 | out_section_offsets[i] = convert_types<Address, off_t>(offset); | |
730cdc88 ILT |
1094 | |
1095 | // If this section requires special handling, and if there are | |
1096 | // relocs that apply to it, then we must do the special handling | |
1097 | // before we apply the relocs. | |
1098 | if (offset == -1 && reloc_shndx[i] != 0) | |
1099 | this->set_relocs_must_follow_section_writes(); | |
1100 | } | |
1101 | ||
12e14209 ILT |
1102 | delete sd->section_headers; |
1103 | sd->section_headers = NULL; | |
1104 | delete sd->section_names; | |
1105 | sd->section_names = NULL; | |
1106 | } | |
1107 | ||
5995b570 CC |
1108 | // Layout sections whose layout was deferred while waiting for |
1109 | // input files from a plugin. | |
1110 | ||
1111 | template<int size, bool big_endian> | |
1112 | void | |
1113 | Sized_relobj<size, big_endian>::do_layout_deferred_sections(Layout* layout) | |
1114 | { | |
1115 | typename std::vector<Deferred_layout>::iterator deferred; | |
1116 | ||
1117 | for (deferred = this->deferred_layout_.begin(); | |
1118 | deferred != this->deferred_layout_.end(); | |
1119 | ++deferred) | |
1120 | { | |
1121 | typename This::Shdr shdr(deferred->shdr_data_); | |
1122 | this->layout_section(layout, deferred->shndx_, deferred->name_.c_str(), | |
1123 | shdr, deferred->reloc_shndx_, deferred->reloc_type_); | |
1124 | } | |
1125 | ||
1126 | this->deferred_layout_.clear(); | |
1127 | } | |
1128 | ||
12e14209 ILT |
1129 | // Add the symbols to the symbol table. |
1130 | ||
1131 | template<int size, bool big_endian> | |
1132 | void | |
f6ce93d6 | 1133 | Sized_relobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, |
12e14209 ILT |
1134 | Read_symbols_data* sd) |
1135 | { | |
1136 | if (sd->symbols == NULL) | |
1137 | { | |
a3ad94ed | 1138 | gold_assert(sd->symbol_names == NULL); |
12e14209 ILT |
1139 | return; |
1140 | } | |
a2fb1b05 | 1141 | |
12e14209 | 1142 | const int sym_size = This::sym_size; |
730cdc88 ILT |
1143 | size_t symcount = ((sd->symbols_size - sd->external_symbols_offset) |
1144 | / sym_size); | |
8383303e | 1145 | if (symcount * sym_size != sd->symbols_size - sd->external_symbols_offset) |
12e14209 | 1146 | { |
75f2446e ILT |
1147 | this->error(_("size of symbols is not multiple of symbol size")); |
1148 | return; | |
a2fb1b05 | 1149 | } |
12e14209 | 1150 | |
730cdc88 | 1151 | this->symbols_.resize(symcount); |
12e14209 | 1152 | |
12e14209 ILT |
1153 | const char* sym_names = |
1154 | reinterpret_cast<const char*>(sd->symbol_names->data()); | |
730cdc88 ILT |
1155 | symtab->add_from_relobj(this, |
1156 | sd->symbols->data() + sd->external_symbols_offset, | |
7fcd3aa9 | 1157 | symcount, this->local_symbol_count_, |
d491d34e | 1158 | sym_names, sd->symbol_names_size, |
92de84a6 ILT |
1159 | &this->symbols_, |
1160 | &this->defined_count_); | |
12e14209 ILT |
1161 | |
1162 | delete sd->symbols; | |
1163 | sd->symbols = NULL; | |
1164 | delete sd->symbol_names; | |
1165 | sd->symbol_names = NULL; | |
bae7f79e ILT |
1166 | } |
1167 | ||
cb295612 ILT |
1168 | // First pass over the local symbols. Here we add their names to |
1169 | // *POOL and *DYNPOOL, and we store the symbol value in | |
1170 | // THIS->LOCAL_VALUES_. This function is always called from a | |
1171 | // singleton thread. This is followed by a call to | |
1172 | // finalize_local_symbols. | |
75f65a3e ILT |
1173 | |
1174 | template<int size, bool big_endian> | |
7bf1f802 ILT |
1175 | void |
1176 | Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool, | |
1177 | Stringpool* dynpool) | |
75f65a3e | 1178 | { |
a3ad94ed | 1179 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 1180 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
1181 | { |
1182 | // This object has no symbols. Weird but legal. | |
7bf1f802 | 1183 | return; |
61ba1cf9 ILT |
1184 | } |
1185 | ||
75f65a3e | 1186 | // Read the symbol table section header. |
645f8123 ILT |
1187 | const unsigned int symtab_shndx = this->symtab_shndx_; |
1188 | typename This::Shdr symtabshdr(this, | |
1189 | this->elf_file_.section_header(symtab_shndx)); | |
a3ad94ed | 1190 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
75f65a3e ILT |
1191 | |
1192 | // Read the local symbols. | |
75f65a3e | 1193 | const int sym_size = This::sym_size; |
92e059d8 | 1194 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 1195 | gold_assert(loccount == symtabshdr.get_sh_info()); |
75f65a3e ILT |
1196 | off_t locsize = loccount * sym_size; |
1197 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), | |
39d0cb0e | 1198 | locsize, true, true); |
75f65a3e | 1199 | |
75f65a3e | 1200 | // Read the symbol names. |
d491d34e ILT |
1201 | const unsigned int strtab_shndx = |
1202 | this->adjust_shndx(symtabshdr.get_sh_link()); | |
8383303e | 1203 | section_size_type strtab_size; |
645f8123 | 1204 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, |
9eb9fa57 ILT |
1205 | &strtab_size, |
1206 | true); | |
75f65a3e ILT |
1207 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
1208 | ||
1209 | // Loop over the local symbols. | |
1210 | ||
ef9beddf | 1211 | const Output_sections& out_sections(this->output_sections()); |
75f65a3e | 1212 | unsigned int shnum = this->shnum(); |
61ba1cf9 | 1213 | unsigned int count = 0; |
7bf1f802 | 1214 | unsigned int dyncount = 0; |
75f65a3e ILT |
1215 | // Skip the first, dummy, symbol. |
1216 | psyms += sym_size; | |
61ba1cf9 | 1217 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
75f65a3e ILT |
1218 | { |
1219 | elfcpp::Sym<size, big_endian> sym(psyms); | |
1220 | ||
b8e6aad9 ILT |
1221 | Symbol_value<size>& lv(this->local_values_[i]); |
1222 | ||
d491d34e ILT |
1223 | bool is_ordinary; |
1224 | unsigned int shndx = this->adjust_sym_shndx(i, sym.get_st_shndx(), | |
1225 | &is_ordinary); | |
1226 | lv.set_input_shndx(shndx, is_ordinary); | |
75f65a3e | 1227 | |
063f12a8 ILT |
1228 | if (sym.get_st_type() == elfcpp::STT_SECTION) |
1229 | lv.set_is_section_symbol(); | |
7bf1f802 ILT |
1230 | else if (sym.get_st_type() == elfcpp::STT_TLS) |
1231 | lv.set_is_tls_symbol(); | |
1232 | ||
1233 | // Save the input symbol value for use in do_finalize_local_symbols(). | |
1234 | lv.set_input_value(sym.get_st_value()); | |
1235 | ||
1236 | // Decide whether this symbol should go into the output file. | |
063f12a8 | 1237 | |
ef9beddf | 1238 | if (shndx < shnum && out_sections[shndx] == NULL) |
7bf1f802 ILT |
1239 | { |
1240 | lv.set_no_output_symtab_entry(); | |
dceae3c1 | 1241 | gold_assert(!lv.needs_output_dynsym_entry()); |
7bf1f802 ILT |
1242 | continue; |
1243 | } | |
1244 | ||
1245 | if (sym.get_st_type() == elfcpp::STT_SECTION) | |
1246 | { | |
1247 | lv.set_no_output_symtab_entry(); | |
dceae3c1 | 1248 | gold_assert(!lv.needs_output_dynsym_entry()); |
7bf1f802 ILT |
1249 | continue; |
1250 | } | |
1251 | ||
1252 | if (sym.get_st_name() >= strtab_size) | |
1253 | { | |
1254 | this->error(_("local symbol %u section name out of range: %u >= %u"), | |
1255 | i, sym.get_st_name(), | |
1256 | static_cast<unsigned int>(strtab_size)); | |
1257 | lv.set_no_output_symtab_entry(); | |
1258 | continue; | |
1259 | } | |
1260 | ||
1261 | // Add the symbol to the symbol table string pool. | |
1262 | const char* name = pnames + sym.get_st_name(); | |
1263 | pool->add(name, true, NULL); | |
1264 | ++count; | |
1265 | ||
1266 | // If needed, add the symbol to the dynamic symbol table string pool. | |
1267 | if (lv.needs_output_dynsym_entry()) | |
1268 | { | |
1269 | dynpool->add(name, true, NULL); | |
1270 | ++dyncount; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | this->output_local_symbol_count_ = count; | |
1275 | this->output_local_dynsym_count_ = dyncount; | |
1276 | } | |
1277 | ||
cb295612 | 1278 | // Finalize the local symbols. Here we set the final value in |
7bf1f802 | 1279 | // THIS->LOCAL_VALUES_ and set their output symbol table indexes. |
17a1d0a9 | 1280 | // This function is always called from a singleton thread. The actual |
7bf1f802 ILT |
1281 | // output of the local symbols will occur in a separate task. |
1282 | ||
1283 | template<int size, bool big_endian> | |
1284 | unsigned int | |
1285 | Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index, | |
d491d34e | 1286 | off_t off) |
7bf1f802 ILT |
1287 | { |
1288 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); | |
1289 | ||
1290 | const unsigned int loccount = this->local_symbol_count_; | |
1291 | this->local_symbol_offset_ = off; | |
1292 | ||
ef9beddf ILT |
1293 | const Output_sections& out_sections(this->output_sections()); |
1294 | const std::vector<Address>& out_offsets(this->section_offsets_); | |
7bf1f802 ILT |
1295 | unsigned int shnum = this->shnum(); |
1296 | ||
1297 | for (unsigned int i = 1; i < loccount; ++i) | |
1298 | { | |
1299 | Symbol_value<size>& lv(this->local_values_[i]); | |
1300 | ||
d491d34e ILT |
1301 | bool is_ordinary; |
1302 | unsigned int shndx = lv.input_shndx(&is_ordinary); | |
7bf1f802 ILT |
1303 | |
1304 | // Set the output symbol value. | |
ef9beddf | 1305 | |
d491d34e | 1306 | if (!is_ordinary) |
75f65a3e | 1307 | { |
0dfbdef4 | 1308 | if (shndx == elfcpp::SHN_ABS || shndx == elfcpp::SHN_COMMON) |
7bf1f802 | 1309 | lv.set_output_value(lv.input_value()); |
61ba1cf9 | 1310 | else |
75f65a3e | 1311 | { |
75f2446e ILT |
1312 | this->error(_("unknown section index %u for local symbol %u"), |
1313 | shndx, i); | |
1314 | lv.set_output_value(0); | |
75f65a3e | 1315 | } |
75f65a3e ILT |
1316 | } |
1317 | else | |
1318 | { | |
1319 | if (shndx >= shnum) | |
1320 | { | |
75f2446e ILT |
1321 | this->error(_("local symbol %u section index %u out of range"), |
1322 | i, shndx); | |
1323 | shndx = 0; | |
75f65a3e ILT |
1324 | } |
1325 | ||
ef9beddf | 1326 | Output_section* os = out_sections[shndx]; |
b8e6aad9 ILT |
1327 | |
1328 | if (os == NULL) | |
61ba1cf9 | 1329 | { |
e94cf127 CC |
1330 | // This local symbol belongs to a section we are discarding. |
1331 | // In some cases when applying relocations later, we will | |
1332 | // attempt to match it to the corresponding kept section, | |
1333 | // so we leave the input value unchanged here. | |
61ba1cf9 ILT |
1334 | continue; |
1335 | } | |
eff45813 | 1336 | else if (out_offsets[shndx] == invalid_address) |
7bf1f802 | 1337 | { |
a9a60db6 ILT |
1338 | // This is a SHF_MERGE section or one which otherwise |
1339 | // requires special handling. We get the output address | |
1340 | // of the start of the merged section. If this is not a | |
1341 | // section symbol, we can then determine the final | |
1342 | // value. If it is a section symbol, we can not, as in | |
1343 | // that case we have to consider the addend to determine | |
1344 | // the value to use in a relocation. | |
a9a60db6 | 1345 | if (!lv.is_section_symbol()) |
8d32f935 ILT |
1346 | lv.set_output_value(os->output_address(this, shndx, |
1347 | lv.input_value())); | |
a9a60db6 ILT |
1348 | else |
1349 | { | |
8d32f935 ILT |
1350 | section_offset_type start = |
1351 | os->starting_output_address(this, shndx); | |
a9a60db6 ILT |
1352 | Merged_symbol_value<size>* msv = |
1353 | new Merged_symbol_value<size>(lv.input_value(), start); | |
1354 | lv.set_merged_symbol_value(msv); | |
1355 | } | |
7bf1f802 ILT |
1356 | } |
1357 | else if (lv.is_tls_symbol()) | |
a9a60db6 | 1358 | lv.set_output_value(os->tls_offset() |
ef9beddf | 1359 | + out_offsets[shndx] |
7bf1f802 | 1360 | + lv.input_value()); |
b8e6aad9 | 1361 | else |
a9a60db6 | 1362 | lv.set_output_value(os->address() |
ef9beddf | 1363 | + out_offsets[shndx] |
7bf1f802 | 1364 | + lv.input_value()); |
75f65a3e ILT |
1365 | } |
1366 | ||
7bf1f802 ILT |
1367 | if (lv.needs_output_symtab_entry()) |
1368 | { | |
1369 | lv.set_output_symtab_index(index); | |
1370 | ++index; | |
1371 | } | |
1372 | } | |
1373 | return index; | |
1374 | } | |
645f8123 | 1375 | |
7bf1f802 | 1376 | // Set the output dynamic symbol table indexes for the local variables. |
c06b7b0b | 1377 | |
7bf1f802 ILT |
1378 | template<int size, bool big_endian> |
1379 | unsigned int | |
1380 | Sized_relobj<size, big_endian>::do_set_local_dynsym_indexes(unsigned int index) | |
1381 | { | |
1382 | const unsigned int loccount = this->local_symbol_count_; | |
1383 | for (unsigned int i = 1; i < loccount; ++i) | |
1384 | { | |
1385 | Symbol_value<size>& lv(this->local_values_[i]); | |
1386 | if (lv.needs_output_dynsym_entry()) | |
1387 | { | |
1388 | lv.set_output_dynsym_index(index); | |
1389 | ++index; | |
1390 | } | |
75f65a3e | 1391 | } |
7bf1f802 ILT |
1392 | return index; |
1393 | } | |
75f65a3e | 1394 | |
7bf1f802 ILT |
1395 | // Set the offset where local dynamic symbol information will be stored. |
1396 | // Returns the count of local symbols contributed to the symbol table by | |
1397 | // this object. | |
61ba1cf9 | 1398 | |
7bf1f802 ILT |
1399 | template<int size, bool big_endian> |
1400 | unsigned int | |
1401 | Sized_relobj<size, big_endian>::do_set_local_dynsym_offset(off_t off) | |
1402 | { | |
1403 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); | |
1404 | this->local_dynsym_offset_ = off; | |
1405 | return this->output_local_dynsym_count_; | |
75f65a3e ILT |
1406 | } |
1407 | ||
61ba1cf9 ILT |
1408 | // Write out the local symbols. |
1409 | ||
1410 | template<int size, bool big_endian> | |
1411 | void | |
17a1d0a9 ILT |
1412 | Sized_relobj<size, big_endian>::write_local_symbols( |
1413 | Output_file* of, | |
1414 | const Stringpool* sympool, | |
d491d34e ILT |
1415 | const Stringpool* dynpool, |
1416 | Output_symtab_xindex* symtab_xindex, | |
1417 | Output_symtab_xindex* dynsym_xindex) | |
61ba1cf9 | 1418 | { |
8851ecca ILT |
1419 | if (parameters->options().strip_all() |
1420 | && this->output_local_dynsym_count_ == 0) | |
9e2dcb77 ILT |
1421 | return; |
1422 | ||
a3ad94ed | 1423 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 1424 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
1425 | { |
1426 | // This object has no symbols. Weird but legal. | |
1427 | return; | |
1428 | } | |
1429 | ||
1430 | // Read the symbol table section header. | |
645f8123 ILT |
1431 | const unsigned int symtab_shndx = this->symtab_shndx_; |
1432 | typename This::Shdr symtabshdr(this, | |
1433 | this->elf_file_.section_header(symtab_shndx)); | |
a3ad94ed | 1434 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
92e059d8 | 1435 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 1436 | gold_assert(loccount == symtabshdr.get_sh_info()); |
61ba1cf9 ILT |
1437 | |
1438 | // Read the local symbols. | |
1439 | const int sym_size = This::sym_size; | |
92e059d8 | 1440 | off_t locsize = loccount * sym_size; |
61ba1cf9 | 1441 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), |
39d0cb0e | 1442 | locsize, true, false); |
61ba1cf9 | 1443 | |
61ba1cf9 | 1444 | // Read the symbol names. |
d491d34e ILT |
1445 | const unsigned int strtab_shndx = |
1446 | this->adjust_shndx(symtabshdr.get_sh_link()); | |
8383303e | 1447 | section_size_type strtab_size; |
645f8123 | 1448 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, |
9eb9fa57 | 1449 | &strtab_size, |
cb295612 | 1450 | false); |
61ba1cf9 ILT |
1451 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
1452 | ||
7bf1f802 ILT |
1453 | // Get views into the output file for the portions of the symbol table |
1454 | // and the dynamic symbol table that we will be writing. | |
61ba1cf9 | 1455 | off_t output_size = this->output_local_symbol_count_ * sym_size; |
f2619d6c | 1456 | unsigned char* oview = NULL; |
7bf1f802 ILT |
1457 | if (output_size > 0) |
1458 | oview = of->get_output_view(this->local_symbol_offset_, output_size); | |
1459 | ||
1460 | off_t dyn_output_size = this->output_local_dynsym_count_ * sym_size; | |
1461 | unsigned char* dyn_oview = NULL; | |
1462 | if (dyn_output_size > 0) | |
1463 | dyn_oview = of->get_output_view(this->local_dynsym_offset_, | |
1464 | dyn_output_size); | |
61ba1cf9 | 1465 | |
ef9beddf | 1466 | const Output_sections out_sections(this->output_sections()); |
c06b7b0b | 1467 | |
a3ad94ed | 1468 | gold_assert(this->local_values_.size() == loccount); |
61ba1cf9 | 1469 | |
61ba1cf9 | 1470 | unsigned char* ov = oview; |
7bf1f802 | 1471 | unsigned char* dyn_ov = dyn_oview; |
c06b7b0b | 1472 | psyms += sym_size; |
92e059d8 | 1473 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
61ba1cf9 ILT |
1474 | { |
1475 | elfcpp::Sym<size, big_endian> isym(psyms); | |
f6ce93d6 | 1476 | |
d491d34e ILT |
1477 | Symbol_value<size>& lv(this->local_values_[i]); |
1478 | ||
1479 | bool is_ordinary; | |
1480 | unsigned int st_shndx = this->adjust_sym_shndx(i, isym.get_st_shndx(), | |
1481 | &is_ordinary); | |
1482 | if (is_ordinary) | |
61ba1cf9 | 1483 | { |
ef9beddf ILT |
1484 | gold_assert(st_shndx < out_sections.size()); |
1485 | if (out_sections[st_shndx] == NULL) | |
61ba1cf9 | 1486 | continue; |
ef9beddf | 1487 | st_shndx = out_sections[st_shndx]->out_shndx(); |
d491d34e ILT |
1488 | if (st_shndx >= elfcpp::SHN_LORESERVE) |
1489 | { | |
1490 | if (lv.needs_output_symtab_entry()) | |
1491 | symtab_xindex->add(lv.output_symtab_index(), st_shndx); | |
1492 | if (lv.needs_output_dynsym_entry()) | |
1493 | dynsym_xindex->add(lv.output_dynsym_index(), st_shndx); | |
1494 | st_shndx = elfcpp::SHN_XINDEX; | |
1495 | } | |
61ba1cf9 ILT |
1496 | } |
1497 | ||
7bf1f802 | 1498 | // Write the symbol to the output symbol table. |
8851ecca | 1499 | if (!parameters->options().strip_all() |
d491d34e | 1500 | && lv.needs_output_symtab_entry()) |
7bf1f802 ILT |
1501 | { |
1502 | elfcpp::Sym_write<size, big_endian> osym(ov); | |
1503 | ||
1504 | gold_assert(isym.get_st_name() < strtab_size); | |
1505 | const char* name = pnames + isym.get_st_name(); | |
1506 | osym.put_st_name(sympool->get_offset(name)); | |
1507 | osym.put_st_value(this->local_values_[i].value(this, 0)); | |
1508 | osym.put_st_size(isym.get_st_size()); | |
1509 | osym.put_st_info(isym.get_st_info()); | |
1510 | osym.put_st_other(isym.get_st_other()); | |
1511 | osym.put_st_shndx(st_shndx); | |
1512 | ||
1513 | ov += sym_size; | |
1514 | } | |
1515 | ||
1516 | // Write the symbol to the output dynamic symbol table. | |
d491d34e | 1517 | if (lv.needs_output_dynsym_entry()) |
7bf1f802 ILT |
1518 | { |
1519 | gold_assert(dyn_ov < dyn_oview + dyn_output_size); | |
1520 | elfcpp::Sym_write<size, big_endian> osym(dyn_ov); | |
1521 | ||
1522 | gold_assert(isym.get_st_name() < strtab_size); | |
1523 | const char* name = pnames + isym.get_st_name(); | |
1524 | osym.put_st_name(dynpool->get_offset(name)); | |
1525 | osym.put_st_value(this->local_values_[i].value(this, 0)); | |
1526 | osym.put_st_size(isym.get_st_size()); | |
1527 | osym.put_st_info(isym.get_st_info()); | |
1528 | osym.put_st_other(isym.get_st_other()); | |
1529 | osym.put_st_shndx(st_shndx); | |
1530 | ||
1531 | dyn_ov += sym_size; | |
1532 | } | |
1533 | } | |
f6ce93d6 | 1534 | |
61ba1cf9 | 1535 | |
7bf1f802 ILT |
1536 | if (output_size > 0) |
1537 | { | |
1538 | gold_assert(ov - oview == output_size); | |
1539 | of->write_output_view(this->local_symbol_offset_, output_size, oview); | |
61ba1cf9 ILT |
1540 | } |
1541 | ||
7bf1f802 ILT |
1542 | if (dyn_output_size > 0) |
1543 | { | |
1544 | gold_assert(dyn_ov - dyn_oview == dyn_output_size); | |
1545 | of->write_output_view(this->local_dynsym_offset_, dyn_output_size, | |
1546 | dyn_oview); | |
1547 | } | |
61ba1cf9 ILT |
1548 | } |
1549 | ||
f7e2ee48 ILT |
1550 | // Set *INFO to symbolic information about the offset OFFSET in the |
1551 | // section SHNDX. Return true if we found something, false if we | |
1552 | // found nothing. | |
1553 | ||
1554 | template<int size, bool big_endian> | |
1555 | bool | |
1556 | Sized_relobj<size, big_endian>::get_symbol_location_info( | |
1557 | unsigned int shndx, | |
1558 | off_t offset, | |
1559 | Symbol_location_info* info) | |
1560 | { | |
1561 | if (this->symtab_shndx_ == 0) | |
1562 | return false; | |
1563 | ||
8383303e | 1564 | section_size_type symbols_size; |
f7e2ee48 ILT |
1565 | const unsigned char* symbols = this->section_contents(this->symtab_shndx_, |
1566 | &symbols_size, | |
1567 | false); | |
1568 | ||
d491d34e ILT |
1569 | unsigned int symbol_names_shndx = |
1570 | this->adjust_shndx(this->section_link(this->symtab_shndx_)); | |
8383303e | 1571 | section_size_type names_size; |
f7e2ee48 ILT |
1572 | const unsigned char* symbol_names_u = |
1573 | this->section_contents(symbol_names_shndx, &names_size, false); | |
1574 | const char* symbol_names = reinterpret_cast<const char*>(symbol_names_u); | |
1575 | ||
1576 | const int sym_size = This::sym_size; | |
1577 | const size_t count = symbols_size / sym_size; | |
1578 | ||
1579 | const unsigned char* p = symbols; | |
1580 | for (size_t i = 0; i < count; ++i, p += sym_size) | |
1581 | { | |
1582 | elfcpp::Sym<size, big_endian> sym(p); | |
1583 | ||
1584 | if (sym.get_st_type() == elfcpp::STT_FILE) | |
1585 | { | |
1586 | if (sym.get_st_name() >= names_size) | |
1587 | info->source_file = "(invalid)"; | |
1588 | else | |
1589 | info->source_file = symbol_names + sym.get_st_name(); | |
d491d34e | 1590 | continue; |
f7e2ee48 | 1591 | } |
d491d34e ILT |
1592 | |
1593 | bool is_ordinary; | |
1594 | unsigned int st_shndx = this->adjust_sym_shndx(i, sym.get_st_shndx(), | |
1595 | &is_ordinary); | |
1596 | if (is_ordinary | |
1597 | && st_shndx == shndx | |
1598 | && static_cast<off_t>(sym.get_st_value()) <= offset | |
1599 | && (static_cast<off_t>(sym.get_st_value() + sym.get_st_size()) | |
1600 | > offset)) | |
f7e2ee48 ILT |
1601 | { |
1602 | if (sym.get_st_name() > names_size) | |
1603 | info->enclosing_symbol_name = "(invalid)"; | |
1604 | else | |
a2b1aa12 ILT |
1605 | { |
1606 | info->enclosing_symbol_name = symbol_names + sym.get_st_name(); | |
086a1841 | 1607 | if (parameters->options().do_demangle()) |
a2b1aa12 ILT |
1608 | { |
1609 | char* demangled_name = cplus_demangle( | |
1610 | info->enclosing_symbol_name.c_str(), | |
1611 | DMGL_ANSI | DMGL_PARAMS); | |
1612 | if (demangled_name != NULL) | |
1613 | { | |
1614 | info->enclosing_symbol_name.assign(demangled_name); | |
1615 | free(demangled_name); | |
1616 | } | |
1617 | } | |
1618 | } | |
f7e2ee48 ILT |
1619 | return true; |
1620 | } | |
1621 | } | |
1622 | ||
1623 | return false; | |
1624 | } | |
1625 | ||
e94cf127 CC |
1626 | // Look for a kept section corresponding to the given discarded section, |
1627 | // and return its output address. This is used only for relocations in | |
1628 | // debugging sections. If we can't find the kept section, return 0. | |
1629 | ||
1630 | template<int size, bool big_endian> | |
1631 | typename Sized_relobj<size, big_endian>::Address | |
1632 | Sized_relobj<size, big_endian>::map_to_kept_section( | |
1633 | unsigned int shndx, | |
1634 | bool* found) const | |
1635 | { | |
1636 | Kept_comdat_section *kept = this->get_kept_comdat_section(shndx); | |
1637 | if (kept != NULL) | |
1638 | { | |
1639 | gold_assert(kept->object_ != NULL); | |
1640 | *found = true; | |
ef9beddf ILT |
1641 | Output_section* os = kept->object_->output_section(kept->shndx_); |
1642 | Address offset = kept->object_->get_output_section_offset(kept->shndx_); | |
eff45813 | 1643 | gold_assert(os != NULL && offset != invalid_address); |
ef9beddf | 1644 | return os->address() + offset; |
e94cf127 CC |
1645 | } |
1646 | *found = false; | |
1647 | return 0; | |
1648 | } | |
1649 | ||
92de84a6 ILT |
1650 | // Get symbol counts. |
1651 | ||
1652 | template<int size, bool big_endian> | |
1653 | void | |
1654 | Sized_relobj<size, big_endian>::do_get_global_symbol_counts( | |
1655 | const Symbol_table*, | |
1656 | size_t* defined, | |
1657 | size_t* used) const | |
1658 | { | |
1659 | *defined = this->defined_count_; | |
1660 | size_t count = 0; | |
1661 | for (Symbols::const_iterator p = this->symbols_.begin(); | |
1662 | p != this->symbols_.end(); | |
1663 | ++p) | |
1664 | if (*p != NULL | |
1665 | && (*p)->source() == Symbol::FROM_OBJECT | |
1666 | && (*p)->object() == this | |
1667 | && (*p)->is_defined()) | |
1668 | ++count; | |
1669 | *used = count; | |
1670 | } | |
1671 | ||
54dc6425 ILT |
1672 | // Input_objects methods. |
1673 | ||
008db82e ILT |
1674 | // Add a regular relocatable object to the list. Return false if this |
1675 | // object should be ignored. | |
f6ce93d6 | 1676 | |
008db82e | 1677 | bool |
54dc6425 ILT |
1678 | Input_objects::add_object(Object* obj) |
1679 | { | |
fbfba508 | 1680 | // Set the global target from the first object file we recognize. |
019cdb1a | 1681 | Target* target = obj->target(); |
8851ecca | 1682 | if (!parameters->target_valid()) |
fbfba508 | 1683 | set_parameters_target(target); |
8851ecca | 1684 | else if (target != ¶meters->target()) |
019cdb1a | 1685 | { |
fbfba508 | 1686 | obj->error(_("incompatible target")); |
019cdb1a ILT |
1687 | return false; |
1688 | } | |
1689 | ||
c5818ff1 CC |
1690 | // Print the filename if the -t/--trace option is selected. |
1691 | if (parameters->options().trace()) | |
1692 | gold_info("%s", obj->name().c_str()); | |
1693 | ||
008db82e | 1694 | if (!obj->is_dynamic()) |
f6ce93d6 | 1695 | this->relobj_list_.push_back(static_cast<Relobj*>(obj)); |
008db82e ILT |
1696 | else |
1697 | { | |
1698 | // See if this is a duplicate SONAME. | |
1699 | Dynobj* dynobj = static_cast<Dynobj*>(obj); | |
9a2d6984 | 1700 | const char* soname = dynobj->soname(); |
008db82e ILT |
1701 | |
1702 | std::pair<Unordered_set<std::string>::iterator, bool> ins = | |
9a2d6984 | 1703 | this->sonames_.insert(soname); |
008db82e ILT |
1704 | if (!ins.second) |
1705 | { | |
1706 | // We have already seen a dynamic object with this soname. | |
1707 | return false; | |
1708 | } | |
1709 | ||
1710 | this->dynobj_list_.push_back(dynobj); | |
9a2d6984 ILT |
1711 | |
1712 | // If this is -lc, remember the directory in which we found it. | |
1713 | // We use this when issuing warnings about undefined symbols: as | |
1714 | // a heuristic, we don't warn about system libraries found in | |
1715 | // the same directory as -lc. | |
1716 | if (strncmp(soname, "libc.so", 7) == 0) | |
1717 | { | |
1718 | const char* object_name = dynobj->name().c_str(); | |
1719 | const char* base = lbasename(object_name); | |
1720 | if (base != object_name) | |
1721 | this->system_library_directory_.assign(object_name, | |
1722 | base - 1 - object_name); | |
1723 | } | |
008db82e | 1724 | } |
75f65a3e | 1725 | |
92de84a6 ILT |
1726 | // Add this object to the cross-referencer if requested. |
1727 | if (parameters->options().user_set_print_symbol_counts()) | |
1728 | { | |
1729 | if (this->cref_ == NULL) | |
1730 | this->cref_ = new Cref(); | |
1731 | this->cref_->add_object(obj); | |
1732 | } | |
1733 | ||
008db82e | 1734 | return true; |
54dc6425 ILT |
1735 | } |
1736 | ||
9a2d6984 ILT |
1737 | // Return whether an object was found in the system library directory. |
1738 | ||
1739 | bool | |
1740 | Input_objects::found_in_system_library_directory(const Object* object) const | |
1741 | { | |
1742 | return (!this->system_library_directory_.empty() | |
1743 | && object->name().compare(0, | |
1744 | this->system_library_directory_.size(), | |
1745 | this->system_library_directory_) == 0); | |
1746 | } | |
1747 | ||
e2827e5f ILT |
1748 | // For each dynamic object, record whether we've seen all of its |
1749 | // explicit dependencies. | |
1750 | ||
1751 | void | |
1752 | Input_objects::check_dynamic_dependencies() const | |
1753 | { | |
1754 | for (Dynobj_list::const_iterator p = this->dynobj_list_.begin(); | |
1755 | p != this->dynobj_list_.end(); | |
1756 | ++p) | |
1757 | { | |
1758 | const Dynobj::Needed& needed((*p)->needed()); | |
1759 | bool found_all = true; | |
1760 | for (Dynobj::Needed::const_iterator pneeded = needed.begin(); | |
1761 | pneeded != needed.end(); | |
1762 | ++pneeded) | |
1763 | { | |
1764 | if (this->sonames_.find(*pneeded) == this->sonames_.end()) | |
1765 | { | |
1766 | found_all = false; | |
1767 | break; | |
1768 | } | |
1769 | } | |
1770 | (*p)->set_has_unknown_needed_entries(!found_all); | |
1771 | } | |
1772 | } | |
1773 | ||
92de84a6 ILT |
1774 | // Start processing an archive. |
1775 | ||
1776 | void | |
1777 | Input_objects::archive_start(Archive* archive) | |
1778 | { | |
1779 | if (parameters->options().user_set_print_symbol_counts()) | |
1780 | { | |
1781 | if (this->cref_ == NULL) | |
1782 | this->cref_ = new Cref(); | |
1783 | this->cref_->add_archive_start(archive); | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | // Stop processing an archive. | |
1788 | ||
1789 | void | |
1790 | Input_objects::archive_stop(Archive* archive) | |
1791 | { | |
1792 | if (parameters->options().user_set_print_symbol_counts()) | |
1793 | this->cref_->add_archive_stop(archive); | |
1794 | } | |
1795 | ||
1796 | // Print symbol counts | |
1797 | ||
1798 | void | |
1799 | Input_objects::print_symbol_counts(const Symbol_table* symtab) const | |
1800 | { | |
1801 | if (parameters->options().user_set_print_symbol_counts() | |
1802 | && this->cref_ != NULL) | |
1803 | this->cref_->print_symbol_counts(symtab); | |
1804 | } | |
1805 | ||
92e059d8 ILT |
1806 | // Relocate_info methods. |
1807 | ||
1808 | // Return a string describing the location of a relocation. This is | |
1809 | // only used in error messages. | |
1810 | ||
1811 | template<int size, bool big_endian> | |
1812 | std::string | |
f7e2ee48 | 1813 | Relocate_info<size, big_endian>::location(size_t, off_t offset) const |
92e059d8 | 1814 | { |
5c2c6c95 ILT |
1815 | // See if we can get line-number information from debugging sections. |
1816 | std::string filename; | |
1817 | std::string file_and_lineno; // Better than filename-only, if available. | |
4c50553d | 1818 | |
a55ce7fe | 1819 | Sized_dwarf_line_info<size, big_endian> line_info(this->object); |
24badc65 ILT |
1820 | // This will be "" if we failed to parse the debug info for any reason. |
1821 | file_and_lineno = line_info.addr2line(this->data_shndx, offset); | |
4c50553d | 1822 | |
92e059d8 | 1823 | std::string ret(this->object->name()); |
f7e2ee48 ILT |
1824 | ret += ':'; |
1825 | Symbol_location_info info; | |
1826 | if (this->object->get_symbol_location_info(this->data_shndx, offset, &info)) | |
1827 | { | |
1828 | ret += " in function "; | |
1829 | ret += info.enclosing_symbol_name; | |
1830 | ret += ":"; | |
5c2c6c95 ILT |
1831 | filename = info.source_file; |
1832 | } | |
1833 | ||
1834 | if (!file_and_lineno.empty()) | |
1835 | ret += file_and_lineno; | |
1836 | else | |
1837 | { | |
1838 | if (!filename.empty()) | |
1839 | ret += filename; | |
1840 | ret += "("; | |
1841 | ret += this->object->section_name(this->data_shndx); | |
1842 | char buf[100]; | |
1843 | // Offsets into sections have to be positive. | |
1844 | snprintf(buf, sizeof(buf), "+0x%lx", static_cast<long>(offset)); | |
1845 | ret += buf; | |
1846 | ret += ")"; | |
f7e2ee48 | 1847 | } |
92e059d8 ILT |
1848 | return ret; |
1849 | } | |
1850 | ||
bae7f79e ILT |
1851 | } // End namespace gold. |
1852 | ||
1853 | namespace | |
1854 | { | |
1855 | ||
1856 | using namespace gold; | |
1857 | ||
1858 | // Read an ELF file with the header and return the appropriate | |
1859 | // instance of Object. | |
1860 | ||
1861 | template<int size, bool big_endian> | |
1862 | Object* | |
1863 | make_elf_sized_object(const std::string& name, Input_file* input_file, | |
1864 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1865 | { | |
1866 | int et = ehdr.get_e_type(); | |
bae7f79e ILT |
1867 | if (et == elfcpp::ET_REL) |
1868 | { | |
f6ce93d6 ILT |
1869 | Sized_relobj<size, big_endian>* obj = |
1870 | new Sized_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
bae7f79e ILT |
1871 | obj->setup(ehdr); |
1872 | return obj; | |
1873 | } | |
dbe717ef ILT |
1874 | else if (et == elfcpp::ET_DYN) |
1875 | { | |
1876 | Sized_dynobj<size, big_endian>* obj = | |
1877 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
1878 | obj->setup(ehdr); | |
1879 | return obj; | |
1880 | } | |
bae7f79e ILT |
1881 | else |
1882 | { | |
75f2446e ILT |
1883 | gold_error(_("%s: unsupported ELF file type %d"), |
1884 | name.c_str(), et); | |
1885 | return NULL; | |
bae7f79e ILT |
1886 | } |
1887 | } | |
1888 | ||
1889 | } // End anonymous namespace. | |
1890 | ||
1891 | namespace gold | |
1892 | { | |
1893 | ||
1894 | // Read an ELF file and return the appropriate instance of Object. | |
1895 | ||
1896 | Object* | |
1897 | make_elf_object(const std::string& name, Input_file* input_file, off_t offset, | |
8383303e | 1898 | const unsigned char* p, section_offset_type bytes) |
bae7f79e ILT |
1899 | { |
1900 | if (bytes < elfcpp::EI_NIDENT) | |
1901 | { | |
75f2446e ILT |
1902 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1903 | return NULL; | |
bae7f79e ILT |
1904 | } |
1905 | ||
1906 | int v = p[elfcpp::EI_VERSION]; | |
1907 | if (v != elfcpp::EV_CURRENT) | |
1908 | { | |
1909 | if (v == elfcpp::EV_NONE) | |
75f2446e | 1910 | gold_error(_("%s: invalid ELF version 0"), name.c_str()); |
bae7f79e | 1911 | else |
75f2446e ILT |
1912 | gold_error(_("%s: unsupported ELF version %d"), name.c_str(), v); |
1913 | return NULL; | |
bae7f79e ILT |
1914 | } |
1915 | ||
1916 | int c = p[elfcpp::EI_CLASS]; | |
1917 | if (c == elfcpp::ELFCLASSNONE) | |
1918 | { | |
75f2446e ILT |
1919 | gold_error(_("%s: invalid ELF class 0"), name.c_str()); |
1920 | return NULL; | |
bae7f79e ILT |
1921 | } |
1922 | else if (c != elfcpp::ELFCLASS32 | |
1923 | && c != elfcpp::ELFCLASS64) | |
1924 | { | |
75f2446e ILT |
1925 | gold_error(_("%s: unsupported ELF class %d"), name.c_str(), c); |
1926 | return NULL; | |
bae7f79e ILT |
1927 | } |
1928 | ||
1929 | int d = p[elfcpp::EI_DATA]; | |
1930 | if (d == elfcpp::ELFDATANONE) | |
1931 | { | |
75f2446e ILT |
1932 | gold_error(_("%s: invalid ELF data encoding"), name.c_str()); |
1933 | return NULL; | |
bae7f79e ILT |
1934 | } |
1935 | else if (d != elfcpp::ELFDATA2LSB | |
1936 | && d != elfcpp::ELFDATA2MSB) | |
1937 | { | |
75f2446e ILT |
1938 | gold_error(_("%s: unsupported ELF data encoding %d"), name.c_str(), d); |
1939 | return NULL; | |
bae7f79e ILT |
1940 | } |
1941 | ||
1942 | bool big_endian = d == elfcpp::ELFDATA2MSB; | |
1943 | ||
1944 | if (c == elfcpp::ELFCLASS32) | |
1945 | { | |
1946 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
1947 | { | |
75f2446e ILT |
1948 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1949 | return NULL; | |
bae7f79e ILT |
1950 | } |
1951 | if (big_endian) | |
1952 | { | |
193a53d9 | 1953 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e ILT |
1954 | elfcpp::Ehdr<32, true> ehdr(p); |
1955 | return make_elf_sized_object<32, true>(name, input_file, | |
1956 | offset, ehdr); | |
193a53d9 | 1957 | #else |
75f2446e ILT |
1958 | gold_error(_("%s: not configured to support " |
1959 | "32-bit big-endian object"), | |
1960 | name.c_str()); | |
1961 | return NULL; | |
193a53d9 | 1962 | #endif |
bae7f79e ILT |
1963 | } |
1964 | else | |
1965 | { | |
193a53d9 | 1966 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e ILT |
1967 | elfcpp::Ehdr<32, false> ehdr(p); |
1968 | return make_elf_sized_object<32, false>(name, input_file, | |
1969 | offset, ehdr); | |
193a53d9 | 1970 | #else |
75f2446e ILT |
1971 | gold_error(_("%s: not configured to support " |
1972 | "32-bit little-endian object"), | |
1973 | name.c_str()); | |
1974 | return NULL; | |
193a53d9 | 1975 | #endif |
bae7f79e ILT |
1976 | } |
1977 | } | |
1978 | else | |
1979 | { | |
c165fb93 | 1980 | if (bytes < elfcpp::Elf_sizes<64>::ehdr_size) |
bae7f79e | 1981 | { |
75f2446e ILT |
1982 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1983 | return NULL; | |
bae7f79e ILT |
1984 | } |
1985 | if (big_endian) | |
1986 | { | |
193a53d9 | 1987 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e ILT |
1988 | elfcpp::Ehdr<64, true> ehdr(p); |
1989 | return make_elf_sized_object<64, true>(name, input_file, | |
1990 | offset, ehdr); | |
193a53d9 | 1991 | #else |
75f2446e ILT |
1992 | gold_error(_("%s: not configured to support " |
1993 | "64-bit big-endian object"), | |
1994 | name.c_str()); | |
1995 | return NULL; | |
193a53d9 | 1996 | #endif |
bae7f79e ILT |
1997 | } |
1998 | else | |
1999 | { | |
193a53d9 | 2000 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e ILT |
2001 | elfcpp::Ehdr<64, false> ehdr(p); |
2002 | return make_elf_sized_object<64, false>(name, input_file, | |
2003 | offset, ehdr); | |
193a53d9 | 2004 | #else |
75f2446e ILT |
2005 | gold_error(_("%s: not configured to support " |
2006 | "64-bit little-endian object"), | |
2007 | name.c_str()); | |
2008 | return NULL; | |
193a53d9 | 2009 | #endif |
bae7f79e ILT |
2010 | } |
2011 | } | |
2012 | } | |
2013 | ||
04bf7072 ILT |
2014 | // Instantiate the templates we need. |
2015 | ||
2016 | #ifdef HAVE_TARGET_32_LITTLE | |
2017 | template | |
2018 | void | |
2019 | Object::read_section_data<32, false>(elfcpp::Elf_file<32, false, Object>*, | |
2020 | Read_symbols_data*); | |
2021 | #endif | |
2022 | ||
2023 | #ifdef HAVE_TARGET_32_BIG | |
2024 | template | |
2025 | void | |
2026 | Object::read_section_data<32, true>(elfcpp::Elf_file<32, true, Object>*, | |
2027 | Read_symbols_data*); | |
2028 | #endif | |
2029 | ||
2030 | #ifdef HAVE_TARGET_64_LITTLE | |
2031 | template | |
2032 | void | |
2033 | Object::read_section_data<64, false>(elfcpp::Elf_file<64, false, Object>*, | |
2034 | Read_symbols_data*); | |
2035 | #endif | |
2036 | ||
2037 | #ifdef HAVE_TARGET_64_BIG | |
2038 | template | |
2039 | void | |
2040 | Object::read_section_data<64, true>(elfcpp::Elf_file<64, true, Object>*, | |
2041 | Read_symbols_data*); | |
2042 | #endif | |
bae7f79e | 2043 | |
193a53d9 | 2044 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e | 2045 | template |
f6ce93d6 | 2046 | class Sized_relobj<32, false>; |
193a53d9 | 2047 | #endif |
bae7f79e | 2048 | |
193a53d9 | 2049 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e | 2050 | template |
f6ce93d6 | 2051 | class Sized_relobj<32, true>; |
193a53d9 | 2052 | #endif |
bae7f79e | 2053 | |
193a53d9 | 2054 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e | 2055 | template |
f6ce93d6 | 2056 | class Sized_relobj<64, false>; |
193a53d9 | 2057 | #endif |
bae7f79e | 2058 | |
193a53d9 | 2059 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e | 2060 | template |
f6ce93d6 | 2061 | class Sized_relobj<64, true>; |
193a53d9 | 2062 | #endif |
bae7f79e | 2063 | |
193a53d9 | 2064 | #ifdef HAVE_TARGET_32_LITTLE |
92e059d8 ILT |
2065 | template |
2066 | struct Relocate_info<32, false>; | |
193a53d9 | 2067 | #endif |
92e059d8 | 2068 | |
193a53d9 | 2069 | #ifdef HAVE_TARGET_32_BIG |
92e059d8 ILT |
2070 | template |
2071 | struct Relocate_info<32, true>; | |
193a53d9 | 2072 | #endif |
92e059d8 | 2073 | |
193a53d9 | 2074 | #ifdef HAVE_TARGET_64_LITTLE |
92e059d8 ILT |
2075 | template |
2076 | struct Relocate_info<64, false>; | |
193a53d9 | 2077 | #endif |
92e059d8 | 2078 | |
193a53d9 | 2079 | #ifdef HAVE_TARGET_64_BIG |
92e059d8 ILT |
2080 | template |
2081 | struct Relocate_info<64, true>; | |
193a53d9 | 2082 | #endif |
92e059d8 | 2083 | |
bae7f79e | 2084 | } // End namespace gold. |