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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" |
4c50553d | 36 | #include "reloc.h" |
f6ce93d6 ILT |
37 | #include "object.h" |
38 | #include "dynobj.h" | |
bae7f79e ILT |
39 | |
40 | namespace gold | |
41 | { | |
42 | ||
645f8123 ILT |
43 | // Class Object. |
44 | ||
dbe717ef ILT |
45 | // Set the target based on fields in the ELF file header. |
46 | ||
47 | void | |
48 | Object::set_target(int machine, int size, bool big_endian, int osabi, | |
49 | int abiversion) | |
50 | { | |
51 | Target* target = select_target(machine, size, big_endian, osabi, abiversion); | |
52 | if (target == NULL) | |
75f2446e ILT |
53 | gold_fatal(_("%s: unsupported ELF machine number %d"), |
54 | this->name().c_str(), machine); | |
dbe717ef ILT |
55 | this->target_ = target; |
56 | } | |
57 | ||
75f2446e ILT |
58 | // Report an error for this object file. This is used by the |
59 | // elfcpp::Elf_file interface, and also called by the Object code | |
60 | // itself. | |
645f8123 ILT |
61 | |
62 | void | |
75f2446e | 63 | Object::error(const char* format, ...) const |
645f8123 ILT |
64 | { |
65 | va_list args; | |
645f8123 | 66 | va_start(args, format); |
75f2446e ILT |
67 | char* buf = NULL; |
68 | if (vasprintf(&buf, format, args) < 0) | |
69 | gold_nomem(); | |
645f8123 | 70 | va_end(args); |
75f2446e ILT |
71 | gold_error(_("%s: %s"), this->name().c_str(), buf); |
72 | free(buf); | |
645f8123 ILT |
73 | } |
74 | ||
75 | // Return a view of the contents of a section. | |
76 | ||
77 | const unsigned char* | |
8383303e ILT |
78 | Object::section_contents(unsigned int shndx, section_size_type* plen, |
79 | bool cache) | |
645f8123 ILT |
80 | { |
81 | Location loc(this->do_section_contents(shndx)); | |
8383303e | 82 | *plen = convert_to_section_size_type(loc.data_size); |
39d0cb0e | 83 | return this->get_view(loc.file_offset, *plen, true, cache); |
645f8123 ILT |
84 | } |
85 | ||
dbe717ef ILT |
86 | // Read the section data into SD. This is code common to Sized_relobj |
87 | // and Sized_dynobj, so we put it into Object. | |
88 | ||
89 | template<int size, bool big_endian> | |
90 | void | |
91 | Object::read_section_data(elfcpp::Elf_file<size, big_endian, Object>* elf_file, | |
92 | Read_symbols_data* sd) | |
93 | { | |
94 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
95 | ||
96 | // Read the section headers. | |
97 | const off_t shoff = elf_file->shoff(); | |
98 | const unsigned int shnum = this->shnum(); | |
39d0cb0e ILT |
99 | sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size, |
100 | true, true); | |
dbe717ef ILT |
101 | |
102 | // Read the section names. | |
103 | const unsigned char* pshdrs = sd->section_headers->data(); | |
104 | const unsigned char* pshdrnames = pshdrs + elf_file->shstrndx() * shdr_size; | |
105 | typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames); | |
106 | ||
107 | if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB) | |
75f2446e ILT |
108 | this->error(_("section name section has wrong type: %u"), |
109 | static_cast<unsigned int>(shdrnames.get_sh_type())); | |
dbe717ef | 110 | |
8383303e ILT |
111 | sd->section_names_size = |
112 | convert_to_section_size_type(shdrnames.get_sh_size()); | |
dbe717ef | 113 | sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(), |
39d0cb0e ILT |
114 | sd->section_names_size, false, |
115 | false); | |
dbe717ef ILT |
116 | } |
117 | ||
118 | // If NAME is the name of a special .gnu.warning section, arrange for | |
119 | // the warning to be issued. SHNDX is the section index. Return | |
120 | // whether it is a warning section. | |
121 | ||
122 | bool | |
123 | Object::handle_gnu_warning_section(const char* name, unsigned int shndx, | |
124 | Symbol_table* symtab) | |
125 | { | |
126 | const char warn_prefix[] = ".gnu.warning."; | |
127 | const int warn_prefix_len = sizeof warn_prefix - 1; | |
128 | if (strncmp(name, warn_prefix, warn_prefix_len) == 0) | |
129 | { | |
cb295612 ILT |
130 | // Read the section contents to get the warning text. It would |
131 | // be nicer if we only did this if we have to actually issue a | |
132 | // warning. Unfortunately, warnings are issued as we relocate | |
133 | // sections. That means that we can not lock the object then, | |
134 | // as we might try to issue the same warning multiple times | |
135 | // simultaneously. | |
136 | section_size_type len; | |
137 | const unsigned char* contents = this->section_contents(shndx, &len, | |
138 | false); | |
139 | std::string warning(reinterpret_cast<const char*>(contents), len); | |
140 | symtab->add_warning(name + warn_prefix_len, this, warning); | |
dbe717ef ILT |
141 | return true; |
142 | } | |
143 | return false; | |
144 | } | |
145 | ||
f6ce93d6 | 146 | // Class Sized_relobj. |
bae7f79e ILT |
147 | |
148 | template<int size, bool big_endian> | |
f6ce93d6 | 149 | Sized_relobj<size, big_endian>::Sized_relobj( |
bae7f79e ILT |
150 | const std::string& name, |
151 | Input_file* input_file, | |
152 | off_t offset, | |
153 | const elfcpp::Ehdr<size, big_endian>& ehdr) | |
f6ce93d6 | 154 | : Relobj(name, input_file, offset), |
645f8123 | 155 | elf_file_(this, ehdr), |
dbe717ef | 156 | symtab_shndx_(-1U), |
61ba1cf9 ILT |
157 | local_symbol_count_(0), |
158 | output_local_symbol_count_(0), | |
7bf1f802 | 159 | output_local_dynsym_count_(0), |
730cdc88 | 160 | symbols_(), |
61ba1cf9 | 161 | local_symbol_offset_(0), |
7bf1f802 | 162 | local_dynsym_offset_(0), |
e727fa71 | 163 | local_values_(), |
730cdc88 ILT |
164 | local_got_offsets_(), |
165 | has_eh_frame_(false) | |
bae7f79e | 166 | { |
bae7f79e ILT |
167 | } |
168 | ||
169 | template<int size, bool big_endian> | |
f6ce93d6 | 170 | Sized_relobj<size, big_endian>::~Sized_relobj() |
bae7f79e ILT |
171 | { |
172 | } | |
173 | ||
645f8123 | 174 | // Set up an object file based on the file header. This sets up the |
bae7f79e ILT |
175 | // target and reads the section information. |
176 | ||
177 | template<int size, bool big_endian> | |
178 | void | |
f6ce93d6 | 179 | Sized_relobj<size, big_endian>::setup( |
bae7f79e ILT |
180 | const elfcpp::Ehdr<size, big_endian>& ehdr) |
181 | { | |
dbe717ef ILT |
182 | this->set_target(ehdr.get_e_machine(), size, big_endian, |
183 | ehdr.get_e_ident()[elfcpp::EI_OSABI], | |
184 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); | |
12e14209 | 185 | |
dbe717ef | 186 | const unsigned int shnum = this->elf_file_.shnum(); |
a2fb1b05 | 187 | this->set_shnum(shnum); |
dbe717ef | 188 | } |
12e14209 | 189 | |
dbe717ef ILT |
190 | // Find the SHT_SYMTAB section, given the section headers. The ELF |
191 | // standard says that maybe in the future there can be more than one | |
192 | // SHT_SYMTAB section. Until somebody figures out how that could | |
193 | // work, we assume there is only one. | |
12e14209 | 194 | |
dbe717ef ILT |
195 | template<int size, bool big_endian> |
196 | void | |
197 | Sized_relobj<size, big_endian>::find_symtab(const unsigned char* pshdrs) | |
198 | { | |
199 | const unsigned int shnum = this->shnum(); | |
200 | this->symtab_shndx_ = 0; | |
201 | if (shnum > 0) | |
bae7f79e | 202 | { |
dbe717ef ILT |
203 | // Look through the sections in reverse order, since gas tends |
204 | // to put the symbol table at the end. | |
205 | const unsigned char* p = pshdrs + shnum * This::shdr_size; | |
206 | unsigned int i = shnum; | |
207 | while (i > 0) | |
bae7f79e | 208 | { |
dbe717ef ILT |
209 | --i; |
210 | p -= This::shdr_size; | |
211 | typename This::Shdr shdr(p); | |
212 | if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB) | |
213 | { | |
214 | this->symtab_shndx_ = i; | |
215 | break; | |
216 | } | |
bae7f79e | 217 | } |
bae7f79e ILT |
218 | } |
219 | } | |
220 | ||
730cdc88 ILT |
221 | // Return whether SHDR has the right type and flags to be a GNU |
222 | // .eh_frame section. | |
223 | ||
224 | template<int size, bool big_endian> | |
225 | bool | |
226 | Sized_relobj<size, big_endian>::check_eh_frame_flags( | |
227 | const elfcpp::Shdr<size, big_endian>* shdr) const | |
228 | { | |
2c38906f | 229 | return (shdr->get_sh_type() == elfcpp::SHT_PROGBITS |
1650c4ff | 230 | && (shdr->get_sh_flags() & elfcpp::SHF_ALLOC) != 0); |
730cdc88 ILT |
231 | } |
232 | ||
233 | // Return whether there is a GNU .eh_frame section, given the section | |
234 | // headers and the section names. | |
235 | ||
236 | template<int size, bool big_endian> | |
237 | bool | |
8383303e ILT |
238 | Sized_relobj<size, big_endian>::find_eh_frame( |
239 | const unsigned char* pshdrs, | |
240 | const char* names, | |
241 | section_size_type names_size) const | |
730cdc88 ILT |
242 | { |
243 | const unsigned int shnum = this->shnum(); | |
244 | const unsigned char* p = pshdrs + This::shdr_size; | |
245 | for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size) | |
246 | { | |
247 | typename This::Shdr shdr(p); | |
248 | if (this->check_eh_frame_flags(&shdr)) | |
249 | { | |
250 | if (shdr.get_sh_name() >= names_size) | |
251 | { | |
252 | this->error(_("bad section name offset for section %u: %lu"), | |
253 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
254 | continue; | |
255 | } | |
256 | ||
257 | const char* name = names + shdr.get_sh_name(); | |
258 | if (strcmp(name, ".eh_frame") == 0) | |
259 | return true; | |
260 | } | |
261 | } | |
262 | return false; | |
263 | } | |
264 | ||
12e14209 | 265 | // Read the sections and symbols from an object file. |
bae7f79e ILT |
266 | |
267 | template<int size, bool big_endian> | |
12e14209 | 268 | void |
f6ce93d6 | 269 | Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) |
bae7f79e | 270 | { |
dbe717ef | 271 | this->read_section_data(&this->elf_file_, sd); |
12e14209 | 272 | |
dbe717ef ILT |
273 | const unsigned char* const pshdrs = sd->section_headers->data(); |
274 | ||
275 | this->find_symtab(pshdrs); | |
12e14209 | 276 | |
730cdc88 ILT |
277 | const unsigned char* namesu = sd->section_names->data(); |
278 | const char* names = reinterpret_cast<const char*>(namesu); | |
1650c4ff ILT |
279 | if (memmem(names, sd->section_names_size, ".eh_frame", 10) != NULL) |
280 | { | |
281 | if (this->find_eh_frame(pshdrs, names, sd->section_names_size)) | |
282 | this->has_eh_frame_ = true; | |
283 | } | |
730cdc88 | 284 | |
75f2446e ILT |
285 | sd->symbols = NULL; |
286 | sd->symbols_size = 0; | |
730cdc88 | 287 | sd->external_symbols_offset = 0; |
75f2446e ILT |
288 | sd->symbol_names = NULL; |
289 | sd->symbol_names_size = 0; | |
290 | ||
645f8123 | 291 | if (this->symtab_shndx_ == 0) |
bae7f79e ILT |
292 | { |
293 | // No symbol table. Weird but legal. | |
12e14209 | 294 | return; |
bae7f79e ILT |
295 | } |
296 | ||
12e14209 ILT |
297 | // Get the symbol table section header. |
298 | typename This::Shdr symtabshdr(pshdrs | |
645f8123 | 299 | + this->symtab_shndx_ * This::shdr_size); |
a3ad94ed | 300 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
bae7f79e | 301 | |
730cdc88 ILT |
302 | // If this object has a .eh_frame section, we need all the symbols. |
303 | // Otherwise we only need the external symbols. While it would be | |
304 | // simpler to just always read all the symbols, I've seen object | |
305 | // files with well over 2000 local symbols, which for a 64-bit | |
306 | // object file format is over 5 pages that we don't need to read | |
307 | // now. | |
308 | ||
75f65a3e | 309 | const int sym_size = This::sym_size; |
92e059d8 ILT |
310 | const unsigned int loccount = symtabshdr.get_sh_info(); |
311 | this->local_symbol_count_ = loccount; | |
7bf1f802 | 312 | this->local_values_.resize(loccount); |
8383303e | 313 | section_offset_type locsize = loccount * sym_size; |
730cdc88 | 314 | off_t dataoff = symtabshdr.get_sh_offset(); |
8383303e ILT |
315 | section_size_type datasize = |
316 | convert_to_section_size_type(symtabshdr.get_sh_size()); | |
730cdc88 | 317 | off_t extoff = dataoff + locsize; |
8383303e | 318 | section_size_type extsize = datasize - locsize; |
75f65a3e | 319 | |
730cdc88 | 320 | off_t readoff = this->has_eh_frame_ ? dataoff : extoff; |
8383303e | 321 | section_size_type readsize = this->has_eh_frame_ ? datasize : extsize; |
730cdc88 | 322 | |
39d0cb0e | 323 | File_view* fvsymtab = this->get_lasting_view(readoff, readsize, true, false); |
bae7f79e ILT |
324 | |
325 | // Read the section header for the symbol names. | |
dbe717ef ILT |
326 | unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
327 | if (strtab_shndx >= this->shnum()) | |
bae7f79e | 328 | { |
75f2446e ILT |
329 | this->error(_("invalid symbol table name index: %u"), strtab_shndx); |
330 | return; | |
bae7f79e | 331 | } |
dbe717ef | 332 | typename This::Shdr strtabshdr(pshdrs + strtab_shndx * This::shdr_size); |
bae7f79e ILT |
333 | if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB) |
334 | { | |
75f2446e ILT |
335 | this->error(_("symbol table name section has wrong type: %u"), |
336 | static_cast<unsigned int>(strtabshdr.get_sh_type())); | |
337 | return; | |
bae7f79e ILT |
338 | } |
339 | ||
340 | // Read the symbol names. | |
341 | File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(), | |
39d0cb0e ILT |
342 | strtabshdr.get_sh_size(), |
343 | false, true); | |
bae7f79e | 344 | |
12e14209 | 345 | sd->symbols = fvsymtab; |
730cdc88 ILT |
346 | sd->symbols_size = readsize; |
347 | sd->external_symbols_offset = this->has_eh_frame_ ? locsize : 0; | |
12e14209 | 348 | sd->symbol_names = fvstrtab; |
8383303e ILT |
349 | sd->symbol_names_size = |
350 | convert_to_section_size_type(strtabshdr.get_sh_size()); | |
a2fb1b05 ILT |
351 | } |
352 | ||
730cdc88 ILT |
353 | // Return the section index of symbol SYM. Set *VALUE to its value in |
354 | // the object file. Note that for a symbol which is not defined in | |
355 | // this object file, this will set *VALUE to 0 and return SHN_UNDEF; | |
356 | // it will not return the final value of the symbol in the link. | |
357 | ||
358 | template<int size, bool big_endian> | |
359 | unsigned int | |
360 | Sized_relobj<size, big_endian>::symbol_section_and_value(unsigned int sym, | |
361 | Address* value) | |
362 | { | |
8383303e | 363 | section_size_type symbols_size; |
730cdc88 ILT |
364 | const unsigned char* symbols = this->section_contents(this->symtab_shndx_, |
365 | &symbols_size, | |
366 | false); | |
367 | ||
368 | const size_t count = symbols_size / This::sym_size; | |
369 | gold_assert(sym < count); | |
370 | ||
371 | elfcpp::Sym<size, big_endian> elfsym(symbols + sym * This::sym_size); | |
372 | *value = elfsym.get_st_value(); | |
373 | // FIXME: Handle SHN_XINDEX. | |
374 | return elfsym.get_st_shndx(); | |
375 | } | |
376 | ||
a2fb1b05 ILT |
377 | // Return whether to include a section group in the link. LAYOUT is |
378 | // used to keep track of which section groups we have already seen. | |
379 | // INDEX is the index of the section group and SHDR is the section | |
380 | // header. If we do not want to include this group, we set bits in | |
381 | // OMIT for each section which should be discarded. | |
382 | ||
383 | template<int size, bool big_endian> | |
384 | bool | |
f6ce93d6 | 385 | Sized_relobj<size, big_endian>::include_section_group( |
6a74a719 | 386 | Symbol_table* symtab, |
a2fb1b05 ILT |
387 | Layout* layout, |
388 | unsigned int index, | |
6a74a719 | 389 | const char* name, |
a2fb1b05 ILT |
390 | const elfcpp::Shdr<size, big_endian>& shdr, |
391 | std::vector<bool>* omit) | |
392 | { | |
393 | // Read the section contents. | |
394 | const unsigned char* pcon = this->get_view(shdr.get_sh_offset(), | |
39d0cb0e | 395 | shdr.get_sh_size(), true, false); |
a2fb1b05 ILT |
396 | const elfcpp::Elf_Word* pword = |
397 | reinterpret_cast<const elfcpp::Elf_Word*>(pcon); | |
398 | ||
399 | // The first word contains flags. We only care about COMDAT section | |
400 | // groups. Other section groups are always included in the link | |
401 | // just like ordinary sections. | |
f6ce93d6 | 402 | elfcpp::Elf_Word flags = elfcpp::Swap<32, big_endian>::readval(pword); |
a2fb1b05 ILT |
403 | |
404 | // Look up the group signature, which is the name of a symbol. This | |
405 | // is a lot of effort to go to to read a string. Why didn't they | |
6a74a719 ILT |
406 | // just have the group signature point into the string table, rather |
407 | // than indirect through a symbol? | |
a2fb1b05 ILT |
408 | |
409 | // Get the appropriate symbol table header (this will normally be | |
410 | // the single SHT_SYMTAB section, but in principle it need not be). | |
645f8123 ILT |
411 | const unsigned int link = shdr.get_sh_link(); |
412 | typename This::Shdr symshdr(this, this->elf_file_.section_header(link)); | |
a2fb1b05 ILT |
413 | |
414 | // Read the symbol table entry. | |
415 | if (shdr.get_sh_info() >= symshdr.get_sh_size() / This::sym_size) | |
416 | { | |
75f2446e ILT |
417 | this->error(_("section group %u info %u out of range"), |
418 | index, shdr.get_sh_info()); | |
419 | return false; | |
a2fb1b05 ILT |
420 | } |
421 | off_t symoff = symshdr.get_sh_offset() + shdr.get_sh_info() * This::sym_size; | |
39d0cb0e ILT |
422 | const unsigned char* psym = this->get_view(symoff, This::sym_size, true, |
423 | false); | |
a2fb1b05 ILT |
424 | elfcpp::Sym<size, big_endian> sym(psym); |
425 | ||
a2fb1b05 | 426 | // Read the symbol table names. |
8383303e | 427 | section_size_type symnamelen; |
645f8123 | 428 | const unsigned char* psymnamesu; |
9eb9fa57 ILT |
429 | psymnamesu = this->section_contents(symshdr.get_sh_link(), &symnamelen, |
430 | true); | |
a2fb1b05 ILT |
431 | const char* psymnames = reinterpret_cast<const char*>(psymnamesu); |
432 | ||
433 | // Get the section group signature. | |
645f8123 | 434 | if (sym.get_st_name() >= symnamelen) |
a2fb1b05 | 435 | { |
75f2446e ILT |
436 | this->error(_("symbol %u name offset %u out of range"), |
437 | shdr.get_sh_info(), sym.get_st_name()); | |
438 | return false; | |
a2fb1b05 ILT |
439 | } |
440 | ||
441 | const char* signature = psymnames + sym.get_st_name(); | |
442 | ||
ead1e424 ILT |
443 | // It seems that some versions of gas will create a section group |
444 | // associated with a section symbol, and then fail to give a name to | |
445 | // the section symbol. In such a case, use the name of the section. | |
446 | // FIXME. | |
645f8123 ILT |
447 | std::string secname; |
448 | if (signature[0] == '\0' && sym.get_st_type() == elfcpp::STT_SECTION) | |
ead1e424 | 449 | { |
645f8123 ILT |
450 | secname = this->section_name(sym.get_st_shndx()); |
451 | signature = secname.c_str(); | |
ead1e424 ILT |
452 | } |
453 | ||
a2fb1b05 ILT |
454 | // Record this section group, and see whether we've already seen one |
455 | // with the same signature. | |
6a74a719 ILT |
456 | |
457 | if ((flags & elfcpp::GRP_COMDAT) == 0 | |
458 | || layout->add_comdat(signature, true)) | |
459 | { | |
8851ecca | 460 | if (parameters->options().relocatable()) |
6a74a719 ILT |
461 | layout->layout_group(symtab, this, index, name, signature, shdr, |
462 | pword); | |
463 | return true; | |
464 | } | |
a2fb1b05 ILT |
465 | |
466 | // This is a duplicate. We want to discard the sections in this | |
467 | // group. | |
468 | size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word); | |
469 | for (size_t i = 1; i < count; ++i) | |
470 | { | |
f6ce93d6 ILT |
471 | elfcpp::Elf_Word secnum = |
472 | elfcpp::Swap<32, big_endian>::readval(pword + i); | |
a2fb1b05 ILT |
473 | if (secnum >= this->shnum()) |
474 | { | |
75f2446e ILT |
475 | this->error(_("section %u in section group %u out of range"), |
476 | secnum, index); | |
477 | continue; | |
a2fb1b05 ILT |
478 | } |
479 | (*omit)[secnum] = true; | |
480 | } | |
481 | ||
482 | return false; | |
483 | } | |
484 | ||
485 | // Whether to include a linkonce section in the link. NAME is the | |
486 | // name of the section and SHDR is the section header. | |
487 | ||
488 | // Linkonce sections are a GNU extension implemented in the original | |
489 | // GNU linker before section groups were defined. The semantics are | |
490 | // that we only include one linkonce section with a given name. The | |
491 | // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME, | |
492 | // where T is the type of section and SYMNAME is the name of a symbol. | |
493 | // In an attempt to make linkonce sections interact well with section | |
494 | // groups, we try to identify SYMNAME and use it like a section group | |
495 | // signature. We want to block section groups with that signature, | |
496 | // but not other linkonce sections with that signature. We also use | |
497 | // the full name of the linkonce section as a normal section group | |
498 | // signature. | |
499 | ||
500 | template<int size, bool big_endian> | |
501 | bool | |
f6ce93d6 | 502 | Sized_relobj<size, big_endian>::include_linkonce_section( |
a2fb1b05 ILT |
503 | Layout* layout, |
504 | const char* name, | |
505 | const elfcpp::Shdr<size, big_endian>&) | |
506 | { | |
ad435a24 ILT |
507 | // In general the symbol name we want will be the string following |
508 | // the last '.'. However, we have to handle the case of | |
509 | // .gnu.linkonce.t.__i686.get_pc_thunk.bx, which was generated by | |
510 | // some versions of gcc. So we use a heuristic: if the name starts | |
511 | // with ".gnu.linkonce.t.", we use everything after that. Otherwise | |
512 | // we look for the last '.'. We can't always simply skip | |
513 | // ".gnu.linkonce.X", because we have to deal with cases like | |
514 | // ".gnu.linkonce.d.rel.ro.local". | |
515 | const char* const linkonce_t = ".gnu.linkonce.t."; | |
516 | const char* symname; | |
517 | if (strncmp(name, linkonce_t, strlen(linkonce_t)) == 0) | |
518 | symname = name + strlen(linkonce_t); | |
519 | else | |
520 | symname = strrchr(name, '.') + 1; | |
a783673b ILT |
521 | bool include1 = layout->add_comdat(symname, false); |
522 | bool include2 = layout->add_comdat(name, true); | |
523 | return include1 && include2; | |
a2fb1b05 ILT |
524 | } |
525 | ||
526 | // Lay out the input sections. We walk through the sections and check | |
527 | // whether they should be included in the link. If they should, we | |
528 | // pass them to the Layout object, which will return an output section | |
529 | // and an offset. | |
530 | ||
531 | template<int size, bool big_endian> | |
532 | void | |
7e1edb90 | 533 | Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab, |
f6ce93d6 | 534 | Layout* layout, |
12e14209 | 535 | Read_symbols_data* sd) |
a2fb1b05 | 536 | { |
dbe717ef | 537 | const unsigned int shnum = this->shnum(); |
12e14209 ILT |
538 | if (shnum == 0) |
539 | return; | |
a2fb1b05 ILT |
540 | |
541 | // Get the section headers. | |
12e14209 | 542 | const unsigned char* pshdrs = sd->section_headers->data(); |
a2fb1b05 ILT |
543 | |
544 | // Get the section names. | |
12e14209 | 545 | const unsigned char* pnamesu = sd->section_names->data(); |
a2fb1b05 ILT |
546 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
547 | ||
730cdc88 ILT |
548 | // For each section, record the index of the reloc section if any. |
549 | // Use 0 to mean that there is no reloc section, -1U to mean that | |
550 | // there is more than one. | |
551 | std::vector<unsigned int> reloc_shndx(shnum, 0); | |
552 | std::vector<unsigned int> reloc_type(shnum, elfcpp::SHT_NULL); | |
553 | // Skip the first, dummy, section. | |
554 | pshdrs += This::shdr_size; | |
555 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) | |
556 | { | |
557 | typename This::Shdr shdr(pshdrs); | |
558 | ||
559 | unsigned int sh_type = shdr.get_sh_type(); | |
560 | if (sh_type == elfcpp::SHT_REL || sh_type == elfcpp::SHT_RELA) | |
561 | { | |
562 | unsigned int target_shndx = shdr.get_sh_info(); | |
563 | if (target_shndx == 0 || target_shndx >= shnum) | |
564 | { | |
565 | this->error(_("relocation section %u has bad info %u"), | |
566 | i, target_shndx); | |
567 | continue; | |
568 | } | |
569 | ||
570 | if (reloc_shndx[target_shndx] != 0) | |
571 | reloc_shndx[target_shndx] = -1U; | |
572 | else | |
573 | { | |
574 | reloc_shndx[target_shndx] = i; | |
575 | reloc_type[target_shndx] = sh_type; | |
576 | } | |
577 | } | |
578 | } | |
579 | ||
a2fb1b05 | 580 | std::vector<Map_to_output>& map_sections(this->map_to_output()); |
61ba1cf9 | 581 | map_sections.resize(shnum); |
a2fb1b05 | 582 | |
88dd47ac ILT |
583 | // If we are only linking for symbols, then there is nothing else to |
584 | // do here. | |
585 | if (this->input_file()->just_symbols()) | |
586 | { | |
587 | delete sd->section_headers; | |
588 | sd->section_headers = NULL; | |
589 | delete sd->section_names; | |
590 | sd->section_names = NULL; | |
591 | return; | |
592 | } | |
593 | ||
35cdfc9a ILT |
594 | // Whether we've seen a .note.GNU-stack section. |
595 | bool seen_gnu_stack = false; | |
596 | // The flags of a .note.GNU-stack section. | |
597 | uint64_t gnu_stack_flags = 0; | |
598 | ||
a2fb1b05 ILT |
599 | // Keep track of which sections to omit. |
600 | std::vector<bool> omit(shnum, false); | |
601 | ||
7019cd25 | 602 | // Keep track of reloc sections when emitting relocations. |
8851ecca ILT |
603 | const bool relocatable = parameters->options().relocatable(); |
604 | const bool emit_relocs = (relocatable | |
605 | || parameters->options().emit_relocs()); | |
6a74a719 ILT |
606 | std::vector<unsigned int> reloc_sections; |
607 | ||
730cdc88 ILT |
608 | // Keep track of .eh_frame sections. |
609 | std::vector<unsigned int> eh_frame_sections; | |
610 | ||
f6ce93d6 | 611 | // Skip the first, dummy, section. |
730cdc88 | 612 | pshdrs = sd->section_headers->data() + This::shdr_size; |
f6ce93d6 | 613 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) |
a2fb1b05 | 614 | { |
75f65a3e | 615 | typename This::Shdr shdr(pshdrs); |
a2fb1b05 | 616 | |
12e14209 | 617 | if (shdr.get_sh_name() >= sd->section_names_size) |
a2fb1b05 | 618 | { |
75f2446e ILT |
619 | this->error(_("bad section name offset for section %u: %lu"), |
620 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
621 | return; | |
a2fb1b05 ILT |
622 | } |
623 | ||
624 | const char* name = pnames + shdr.get_sh_name(); | |
625 | ||
dbe717ef | 626 | if (this->handle_gnu_warning_section(name, i, symtab)) |
f6ce93d6 | 627 | { |
8851ecca | 628 | if (!relocatable) |
f6ce93d6 ILT |
629 | omit[i] = true; |
630 | } | |
631 | ||
35cdfc9a ILT |
632 | // The .note.GNU-stack section is special. It gives the |
633 | // protection flags that this object file requires for the stack | |
634 | // in memory. | |
635 | if (strcmp(name, ".note.GNU-stack") == 0) | |
636 | { | |
637 | seen_gnu_stack = true; | |
638 | gnu_stack_flags |= shdr.get_sh_flags(); | |
639 | omit[i] = true; | |
640 | } | |
641 | ||
a2fb1b05 ILT |
642 | bool discard = omit[i]; |
643 | if (!discard) | |
644 | { | |
645 | if (shdr.get_sh_type() == elfcpp::SHT_GROUP) | |
646 | { | |
6a74a719 ILT |
647 | if (!this->include_section_group(symtab, layout, i, name, shdr, |
648 | &omit)) | |
a2fb1b05 ILT |
649 | discard = true; |
650 | } | |
cba134d6 ILT |
651 | else if ((shdr.get_sh_flags() & elfcpp::SHF_GROUP) == 0 |
652 | && Layout::is_linkonce(name)) | |
a2fb1b05 ILT |
653 | { |
654 | if (!this->include_linkonce_section(layout, name, shdr)) | |
655 | discard = true; | |
656 | } | |
657 | } | |
658 | ||
659 | if (discard) | |
660 | { | |
661 | // Do not include this section in the link. | |
662 | map_sections[i].output_section = NULL; | |
663 | continue; | |
664 | } | |
665 | ||
6a74a719 ILT |
666 | // When doing a relocatable link we are going to copy input |
667 | // reloc sections into the output. We only want to copy the | |
668 | // ones associated with sections which are not being discarded. | |
669 | // However, we don't know that yet for all sections. So save | |
670 | // reloc sections and process them later. | |
7019cd25 | 671 | if (emit_relocs |
6a74a719 ILT |
672 | && (shdr.get_sh_type() == elfcpp::SHT_REL |
673 | || shdr.get_sh_type() == elfcpp::SHT_RELA)) | |
674 | { | |
675 | reloc_sections.push_back(i); | |
676 | continue; | |
677 | } | |
678 | ||
8851ecca | 679 | if (relocatable && shdr.get_sh_type() == elfcpp::SHT_GROUP) |
6a74a719 ILT |
680 | continue; |
681 | ||
730cdc88 ILT |
682 | // The .eh_frame section is special. It holds exception frame |
683 | // information that we need to read in order to generate the | |
684 | // exception frame header. We process these after all the other | |
685 | // sections so that the exception frame reader can reliably | |
686 | // determine which sections are being discarded, and discard the | |
687 | // corresponding information. | |
8851ecca | 688 | if (!relocatable |
730cdc88 ILT |
689 | && strcmp(name, ".eh_frame") == 0 |
690 | && this->check_eh_frame_flags(&shdr)) | |
691 | { | |
692 | eh_frame_sections.push_back(i); | |
693 | continue; | |
694 | } | |
695 | ||
a2fb1b05 | 696 | off_t offset; |
730cdc88 ILT |
697 | Output_section* os = layout->layout(this, i, name, shdr, |
698 | reloc_shndx[i], reloc_type[i], | |
699 | &offset); | |
a2fb1b05 ILT |
700 | |
701 | map_sections[i].output_section = os; | |
702 | map_sections[i].offset = offset; | |
730cdc88 ILT |
703 | |
704 | // If this section requires special handling, and if there are | |
705 | // relocs that apply to it, then we must do the special handling | |
706 | // before we apply the relocs. | |
707 | if (offset == -1 && reloc_shndx[i] != 0) | |
708 | this->set_relocs_must_follow_section_writes(); | |
12e14209 ILT |
709 | } |
710 | ||
35cdfc9a ILT |
711 | layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags); |
712 | ||
6a74a719 ILT |
713 | // When doing a relocatable link handle the reloc sections at the |
714 | // end. | |
7019cd25 | 715 | if (emit_relocs) |
6a74a719 ILT |
716 | this->size_relocatable_relocs(); |
717 | for (std::vector<unsigned int>::const_iterator p = reloc_sections.begin(); | |
718 | p != reloc_sections.end(); | |
719 | ++p) | |
720 | { | |
721 | unsigned int i = *p; | |
722 | const unsigned char* pshdr; | |
723 | pshdr = sd->section_headers->data() + i * This::shdr_size; | |
724 | typename This::Shdr shdr(pshdr); | |
725 | ||
726 | unsigned int data_shndx = shdr.get_sh_info(); | |
727 | if (data_shndx >= shnum) | |
728 | { | |
729 | // We already warned about this above. | |
730 | continue; | |
731 | } | |
732 | ||
733 | Output_section* data_section = map_sections[data_shndx].output_section; | |
734 | if (data_section == NULL) | |
735 | { | |
736 | map_sections[i].output_section = NULL; | |
737 | continue; | |
738 | } | |
739 | ||
740 | Relocatable_relocs* rr = new Relocatable_relocs(); | |
741 | this->set_relocatable_relocs(i, rr); | |
742 | ||
743 | Output_section* os = layout->layout_reloc(this, i, shdr, data_section, | |
744 | rr); | |
745 | map_sections[i].output_section = os; | |
746 | map_sections[i].offset = -1; | |
747 | } | |
748 | ||
730cdc88 ILT |
749 | // Handle the .eh_frame sections at the end. |
750 | for (std::vector<unsigned int>::const_iterator p = eh_frame_sections.begin(); | |
751 | p != eh_frame_sections.end(); | |
752 | ++p) | |
753 | { | |
754 | gold_assert(this->has_eh_frame_); | |
755 | gold_assert(sd->external_symbols_offset != 0); | |
756 | ||
757 | unsigned int i = *p; | |
758 | const unsigned char *pshdr; | |
759 | pshdr = sd->section_headers->data() + i * This::shdr_size; | |
760 | typename This::Shdr shdr(pshdr); | |
761 | ||
762 | off_t offset; | |
763 | Output_section* os = layout->layout_eh_frame(this, | |
764 | sd->symbols->data(), | |
765 | sd->symbols_size, | |
766 | sd->symbol_names->data(), | |
767 | sd->symbol_names_size, | |
768 | i, shdr, | |
769 | reloc_shndx[i], | |
770 | reloc_type[i], | |
771 | &offset); | |
772 | map_sections[i].output_section = os; | |
773 | map_sections[i].offset = offset; | |
774 | ||
775 | // If this section requires special handling, and if there are | |
776 | // relocs that apply to it, then we must do the special handling | |
777 | // before we apply the relocs. | |
778 | if (offset == -1 && reloc_shndx[i] != 0) | |
779 | this->set_relocs_must_follow_section_writes(); | |
780 | } | |
781 | ||
12e14209 ILT |
782 | delete sd->section_headers; |
783 | sd->section_headers = NULL; | |
784 | delete sd->section_names; | |
785 | sd->section_names = NULL; | |
786 | } | |
787 | ||
788 | // Add the symbols to the symbol table. | |
789 | ||
790 | template<int size, bool big_endian> | |
791 | void | |
f6ce93d6 | 792 | Sized_relobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, |
12e14209 ILT |
793 | Read_symbols_data* sd) |
794 | { | |
795 | if (sd->symbols == NULL) | |
796 | { | |
a3ad94ed | 797 | gold_assert(sd->symbol_names == NULL); |
12e14209 ILT |
798 | return; |
799 | } | |
a2fb1b05 | 800 | |
12e14209 | 801 | const int sym_size = This::sym_size; |
730cdc88 ILT |
802 | size_t symcount = ((sd->symbols_size - sd->external_symbols_offset) |
803 | / sym_size); | |
8383303e | 804 | if (symcount * sym_size != sd->symbols_size - sd->external_symbols_offset) |
12e14209 | 805 | { |
75f2446e ILT |
806 | this->error(_("size of symbols is not multiple of symbol size")); |
807 | return; | |
a2fb1b05 | 808 | } |
12e14209 | 809 | |
730cdc88 | 810 | this->symbols_.resize(symcount); |
12e14209 | 811 | |
12e14209 ILT |
812 | const char* sym_names = |
813 | reinterpret_cast<const char*>(sd->symbol_names->data()); | |
730cdc88 ILT |
814 | symtab->add_from_relobj(this, |
815 | sd->symbols->data() + sd->external_symbols_offset, | |
816 | symcount, sym_names, sd->symbol_names_size, | |
817 | &this->symbols_); | |
12e14209 ILT |
818 | |
819 | delete sd->symbols; | |
820 | sd->symbols = NULL; | |
821 | delete sd->symbol_names; | |
822 | sd->symbol_names = NULL; | |
bae7f79e ILT |
823 | } |
824 | ||
cb295612 ILT |
825 | // First pass over the local symbols. Here we add their names to |
826 | // *POOL and *DYNPOOL, and we store the symbol value in | |
827 | // THIS->LOCAL_VALUES_. This function is always called from a | |
828 | // singleton thread. This is followed by a call to | |
829 | // finalize_local_symbols. | |
75f65a3e ILT |
830 | |
831 | template<int size, bool big_endian> | |
7bf1f802 ILT |
832 | void |
833 | Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool, | |
834 | Stringpool* dynpool) | |
75f65a3e | 835 | { |
a3ad94ed | 836 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 837 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
838 | { |
839 | // This object has no symbols. Weird but legal. | |
7bf1f802 | 840 | return; |
61ba1cf9 ILT |
841 | } |
842 | ||
75f65a3e | 843 | // Read the symbol table section header. |
645f8123 ILT |
844 | const unsigned int symtab_shndx = this->symtab_shndx_; |
845 | typename This::Shdr symtabshdr(this, | |
846 | this->elf_file_.section_header(symtab_shndx)); | |
a3ad94ed | 847 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
75f65a3e ILT |
848 | |
849 | // Read the local symbols. | |
75f65a3e | 850 | const int sym_size = This::sym_size; |
92e059d8 | 851 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 852 | gold_assert(loccount == symtabshdr.get_sh_info()); |
75f65a3e ILT |
853 | off_t locsize = loccount * sym_size; |
854 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), | |
39d0cb0e | 855 | locsize, true, true); |
75f65a3e | 856 | |
75f65a3e | 857 | // Read the symbol names. |
645f8123 | 858 | const unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
8383303e | 859 | section_size_type strtab_size; |
645f8123 | 860 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, |
9eb9fa57 ILT |
861 | &strtab_size, |
862 | true); | |
75f65a3e ILT |
863 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
864 | ||
865 | // Loop over the local symbols. | |
866 | ||
c06b7b0b | 867 | const std::vector<Map_to_output>& mo(this->map_to_output()); |
75f65a3e | 868 | unsigned int shnum = this->shnum(); |
61ba1cf9 | 869 | unsigned int count = 0; |
7bf1f802 | 870 | unsigned int dyncount = 0; |
75f65a3e ILT |
871 | // Skip the first, dummy, symbol. |
872 | psyms += sym_size; | |
61ba1cf9 | 873 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
75f65a3e ILT |
874 | { |
875 | elfcpp::Sym<size, big_endian> sym(psyms); | |
876 | ||
b8e6aad9 ILT |
877 | Symbol_value<size>& lv(this->local_values_[i]); |
878 | ||
75f65a3e | 879 | unsigned int shndx = sym.get_st_shndx(); |
b8e6aad9 | 880 | lv.set_input_shndx(shndx); |
75f65a3e | 881 | |
063f12a8 ILT |
882 | if (sym.get_st_type() == elfcpp::STT_SECTION) |
883 | lv.set_is_section_symbol(); | |
7bf1f802 ILT |
884 | else if (sym.get_st_type() == elfcpp::STT_TLS) |
885 | lv.set_is_tls_symbol(); | |
886 | ||
887 | // Save the input symbol value for use in do_finalize_local_symbols(). | |
888 | lv.set_input_value(sym.get_st_value()); | |
889 | ||
890 | // Decide whether this symbol should go into the output file. | |
063f12a8 | 891 | |
7bf1f802 ILT |
892 | if (shndx < shnum && mo[shndx].output_section == NULL) |
893 | { | |
894 | lv.set_no_output_symtab_entry(); | |
dceae3c1 | 895 | gold_assert(!lv.needs_output_dynsym_entry()); |
7bf1f802 ILT |
896 | continue; |
897 | } | |
898 | ||
899 | if (sym.get_st_type() == elfcpp::STT_SECTION) | |
900 | { | |
901 | lv.set_no_output_symtab_entry(); | |
dceae3c1 | 902 | gold_assert(!lv.needs_output_dynsym_entry()); |
7bf1f802 ILT |
903 | continue; |
904 | } | |
905 | ||
906 | if (sym.get_st_name() >= strtab_size) | |
907 | { | |
908 | this->error(_("local symbol %u section name out of range: %u >= %u"), | |
909 | i, sym.get_st_name(), | |
910 | static_cast<unsigned int>(strtab_size)); | |
911 | lv.set_no_output_symtab_entry(); | |
912 | continue; | |
913 | } | |
914 | ||
915 | // Add the symbol to the symbol table string pool. | |
916 | const char* name = pnames + sym.get_st_name(); | |
917 | pool->add(name, true, NULL); | |
918 | ++count; | |
919 | ||
920 | // If needed, add the symbol to the dynamic symbol table string pool. | |
921 | if (lv.needs_output_dynsym_entry()) | |
922 | { | |
923 | dynpool->add(name, true, NULL); | |
924 | ++dyncount; | |
925 | } | |
926 | } | |
927 | ||
928 | this->output_local_symbol_count_ = count; | |
929 | this->output_local_dynsym_count_ = dyncount; | |
930 | } | |
931 | ||
cb295612 | 932 | // Finalize the local symbols. Here we set the final value in |
7bf1f802 | 933 | // THIS->LOCAL_VALUES_ and set their output symbol table indexes. |
17a1d0a9 | 934 | // This function is always called from a singleton thread. The actual |
7bf1f802 ILT |
935 | // output of the local symbols will occur in a separate task. |
936 | ||
937 | template<int size, bool big_endian> | |
938 | unsigned int | |
939 | Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index, | |
940 | off_t off) | |
941 | { | |
942 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); | |
943 | ||
944 | const unsigned int loccount = this->local_symbol_count_; | |
945 | this->local_symbol_offset_ = off; | |
946 | ||
947 | const std::vector<Map_to_output>& mo(this->map_to_output()); | |
948 | unsigned int shnum = this->shnum(); | |
949 | ||
950 | for (unsigned int i = 1; i < loccount; ++i) | |
951 | { | |
952 | Symbol_value<size>& lv(this->local_values_[i]); | |
953 | ||
954 | unsigned int shndx = lv.input_shndx(); | |
955 | ||
956 | // Set the output symbol value. | |
957 | ||
75f65a3e ILT |
958 | if (shndx >= elfcpp::SHN_LORESERVE) |
959 | { | |
0dfbdef4 | 960 | if (shndx == elfcpp::SHN_ABS || shndx == elfcpp::SHN_COMMON) |
7bf1f802 | 961 | lv.set_output_value(lv.input_value()); |
61ba1cf9 | 962 | else |
75f65a3e | 963 | { |
61ba1cf9 | 964 | // FIXME: Handle SHN_XINDEX. |
75f2446e ILT |
965 | this->error(_("unknown section index %u for local symbol %u"), |
966 | shndx, i); | |
967 | lv.set_output_value(0); | |
75f65a3e | 968 | } |
75f65a3e ILT |
969 | } |
970 | else | |
971 | { | |
972 | if (shndx >= shnum) | |
973 | { | |
75f2446e ILT |
974 | this->error(_("local symbol %u section index %u out of range"), |
975 | i, shndx); | |
976 | shndx = 0; | |
75f65a3e ILT |
977 | } |
978 | ||
b8e6aad9 ILT |
979 | Output_section* os = mo[shndx].output_section; |
980 | ||
981 | if (os == NULL) | |
61ba1cf9 | 982 | { |
b8e6aad9 | 983 | lv.set_output_value(0); |
61ba1cf9 ILT |
984 | continue; |
985 | } | |
7bf1f802 ILT |
986 | else if (mo[shndx].offset == -1) |
987 | { | |
a9a60db6 ILT |
988 | // This is a SHF_MERGE section or one which otherwise |
989 | // requires special handling. We get the output address | |
990 | // of the start of the merged section. If this is not a | |
991 | // section symbol, we can then determine the final | |
992 | // value. If it is a section symbol, we can not, as in | |
993 | // that case we have to consider the addend to determine | |
994 | // the value to use in a relocation. | |
a9a60db6 | 995 | if (!lv.is_section_symbol()) |
8d32f935 ILT |
996 | lv.set_output_value(os->output_address(this, shndx, |
997 | lv.input_value())); | |
a9a60db6 ILT |
998 | else |
999 | { | |
8d32f935 ILT |
1000 | section_offset_type start = |
1001 | os->starting_output_address(this, shndx); | |
a9a60db6 ILT |
1002 | Merged_symbol_value<size>* msv = |
1003 | new Merged_symbol_value<size>(lv.input_value(), start); | |
1004 | lv.set_merged_symbol_value(msv); | |
1005 | } | |
7bf1f802 ILT |
1006 | } |
1007 | else if (lv.is_tls_symbol()) | |
a9a60db6 | 1008 | lv.set_output_value(os->tls_offset() |
7bf1f802 ILT |
1009 | + mo[shndx].offset |
1010 | + lv.input_value()); | |
b8e6aad9 | 1011 | else |
a9a60db6 | 1012 | lv.set_output_value(os->address() |
b8e6aad9 | 1013 | + mo[shndx].offset |
7bf1f802 | 1014 | + lv.input_value()); |
75f65a3e ILT |
1015 | } |
1016 | ||
7bf1f802 ILT |
1017 | if (lv.needs_output_symtab_entry()) |
1018 | { | |
1019 | lv.set_output_symtab_index(index); | |
1020 | ++index; | |
1021 | } | |
1022 | } | |
1023 | return index; | |
1024 | } | |
645f8123 | 1025 | |
7bf1f802 | 1026 | // Set the output dynamic symbol table indexes for the local variables. |
c06b7b0b | 1027 | |
7bf1f802 ILT |
1028 | template<int size, bool big_endian> |
1029 | unsigned int | |
1030 | Sized_relobj<size, big_endian>::do_set_local_dynsym_indexes(unsigned int index) | |
1031 | { | |
1032 | const unsigned int loccount = this->local_symbol_count_; | |
1033 | for (unsigned int i = 1; i < loccount; ++i) | |
1034 | { | |
1035 | Symbol_value<size>& lv(this->local_values_[i]); | |
1036 | if (lv.needs_output_dynsym_entry()) | |
1037 | { | |
1038 | lv.set_output_dynsym_index(index); | |
1039 | ++index; | |
1040 | } | |
75f65a3e | 1041 | } |
7bf1f802 ILT |
1042 | return index; |
1043 | } | |
75f65a3e | 1044 | |
7bf1f802 ILT |
1045 | // Set the offset where local dynamic symbol information will be stored. |
1046 | // Returns the count of local symbols contributed to the symbol table by | |
1047 | // this object. | |
61ba1cf9 | 1048 | |
7bf1f802 ILT |
1049 | template<int size, bool big_endian> |
1050 | unsigned int | |
1051 | Sized_relobj<size, big_endian>::do_set_local_dynsym_offset(off_t off) | |
1052 | { | |
1053 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); | |
1054 | this->local_dynsym_offset_ = off; | |
1055 | return this->output_local_dynsym_count_; | |
75f65a3e ILT |
1056 | } |
1057 | ||
61ba1cf9 ILT |
1058 | // Write out the local symbols. |
1059 | ||
1060 | template<int size, bool big_endian> | |
1061 | void | |
17a1d0a9 ILT |
1062 | Sized_relobj<size, big_endian>::write_local_symbols( |
1063 | Output_file* of, | |
1064 | const Stringpool* sympool, | |
1065 | const Stringpool* dynpool) | |
61ba1cf9 | 1066 | { |
8851ecca ILT |
1067 | if (parameters->options().strip_all() |
1068 | && this->output_local_dynsym_count_ == 0) | |
9e2dcb77 ILT |
1069 | return; |
1070 | ||
a3ad94ed | 1071 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 1072 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
1073 | { |
1074 | // This object has no symbols. Weird but legal. | |
1075 | return; | |
1076 | } | |
1077 | ||
1078 | // Read the symbol table section header. | |
645f8123 ILT |
1079 | const unsigned int symtab_shndx = this->symtab_shndx_; |
1080 | typename This::Shdr symtabshdr(this, | |
1081 | this->elf_file_.section_header(symtab_shndx)); | |
a3ad94ed | 1082 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
92e059d8 | 1083 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 1084 | gold_assert(loccount == symtabshdr.get_sh_info()); |
61ba1cf9 ILT |
1085 | |
1086 | // Read the local symbols. | |
1087 | const int sym_size = This::sym_size; | |
92e059d8 | 1088 | off_t locsize = loccount * sym_size; |
61ba1cf9 | 1089 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), |
39d0cb0e | 1090 | locsize, true, false); |
61ba1cf9 | 1091 | |
61ba1cf9 | 1092 | // Read the symbol names. |
645f8123 | 1093 | const unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
8383303e | 1094 | section_size_type strtab_size; |
645f8123 | 1095 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, |
9eb9fa57 | 1096 | &strtab_size, |
cb295612 | 1097 | false); |
61ba1cf9 ILT |
1098 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
1099 | ||
7bf1f802 ILT |
1100 | // Get views into the output file for the portions of the symbol table |
1101 | // and the dynamic symbol table that we will be writing. | |
61ba1cf9 | 1102 | off_t output_size = this->output_local_symbol_count_ * sym_size; |
f2619d6c | 1103 | unsigned char* oview = NULL; |
7bf1f802 ILT |
1104 | if (output_size > 0) |
1105 | oview = of->get_output_view(this->local_symbol_offset_, output_size); | |
1106 | ||
1107 | off_t dyn_output_size = this->output_local_dynsym_count_ * sym_size; | |
1108 | unsigned char* dyn_oview = NULL; | |
1109 | if (dyn_output_size > 0) | |
1110 | dyn_oview = of->get_output_view(this->local_dynsym_offset_, | |
1111 | dyn_output_size); | |
61ba1cf9 | 1112 | |
c06b7b0b ILT |
1113 | const std::vector<Map_to_output>& mo(this->map_to_output()); |
1114 | ||
a3ad94ed | 1115 | gold_assert(this->local_values_.size() == loccount); |
61ba1cf9 | 1116 | |
61ba1cf9 | 1117 | unsigned char* ov = oview; |
7bf1f802 | 1118 | unsigned char* dyn_ov = dyn_oview; |
c06b7b0b | 1119 | psyms += sym_size; |
92e059d8 | 1120 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
61ba1cf9 ILT |
1121 | { |
1122 | elfcpp::Sym<size, big_endian> isym(psyms); | |
f6ce93d6 | 1123 | |
61ba1cf9 ILT |
1124 | unsigned int st_shndx = isym.get_st_shndx(); |
1125 | if (st_shndx < elfcpp::SHN_LORESERVE) | |
1126 | { | |
a3ad94ed | 1127 | gold_assert(st_shndx < mo.size()); |
61ba1cf9 ILT |
1128 | if (mo[st_shndx].output_section == NULL) |
1129 | continue; | |
ead1e424 | 1130 | st_shndx = mo[st_shndx].output_section->out_shndx(); |
61ba1cf9 ILT |
1131 | } |
1132 | ||
7bf1f802 | 1133 | // Write the symbol to the output symbol table. |
8851ecca | 1134 | if (!parameters->options().strip_all() |
7bf1f802 ILT |
1135 | && this->local_values_[i].needs_output_symtab_entry()) |
1136 | { | |
1137 | elfcpp::Sym_write<size, big_endian> osym(ov); | |
1138 | ||
1139 | gold_assert(isym.get_st_name() < strtab_size); | |
1140 | const char* name = pnames + isym.get_st_name(); | |
1141 | osym.put_st_name(sympool->get_offset(name)); | |
1142 | osym.put_st_value(this->local_values_[i].value(this, 0)); | |
1143 | osym.put_st_size(isym.get_st_size()); | |
1144 | osym.put_st_info(isym.get_st_info()); | |
1145 | osym.put_st_other(isym.get_st_other()); | |
1146 | osym.put_st_shndx(st_shndx); | |
1147 | ||
1148 | ov += sym_size; | |
1149 | } | |
1150 | ||
1151 | // Write the symbol to the output dynamic symbol table. | |
1152 | if (this->local_values_[i].needs_output_dynsym_entry()) | |
1153 | { | |
1154 | gold_assert(dyn_ov < dyn_oview + dyn_output_size); | |
1155 | elfcpp::Sym_write<size, big_endian> osym(dyn_ov); | |
1156 | ||
1157 | gold_assert(isym.get_st_name() < strtab_size); | |
1158 | const char* name = pnames + isym.get_st_name(); | |
1159 | osym.put_st_name(dynpool->get_offset(name)); | |
1160 | osym.put_st_value(this->local_values_[i].value(this, 0)); | |
1161 | osym.put_st_size(isym.get_st_size()); | |
1162 | osym.put_st_info(isym.get_st_info()); | |
1163 | osym.put_st_other(isym.get_st_other()); | |
1164 | osym.put_st_shndx(st_shndx); | |
1165 | ||
1166 | dyn_ov += sym_size; | |
1167 | } | |
1168 | } | |
f6ce93d6 | 1169 | |
61ba1cf9 | 1170 | |
7bf1f802 ILT |
1171 | if (output_size > 0) |
1172 | { | |
1173 | gold_assert(ov - oview == output_size); | |
1174 | of->write_output_view(this->local_symbol_offset_, output_size, oview); | |
61ba1cf9 ILT |
1175 | } |
1176 | ||
7bf1f802 ILT |
1177 | if (dyn_output_size > 0) |
1178 | { | |
1179 | gold_assert(dyn_ov - dyn_oview == dyn_output_size); | |
1180 | of->write_output_view(this->local_dynsym_offset_, dyn_output_size, | |
1181 | dyn_oview); | |
1182 | } | |
61ba1cf9 ILT |
1183 | } |
1184 | ||
f7e2ee48 ILT |
1185 | // Set *INFO to symbolic information about the offset OFFSET in the |
1186 | // section SHNDX. Return true if we found something, false if we | |
1187 | // found nothing. | |
1188 | ||
1189 | template<int size, bool big_endian> | |
1190 | bool | |
1191 | Sized_relobj<size, big_endian>::get_symbol_location_info( | |
1192 | unsigned int shndx, | |
1193 | off_t offset, | |
1194 | Symbol_location_info* info) | |
1195 | { | |
1196 | if (this->symtab_shndx_ == 0) | |
1197 | return false; | |
1198 | ||
8383303e | 1199 | section_size_type symbols_size; |
f7e2ee48 ILT |
1200 | const unsigned char* symbols = this->section_contents(this->symtab_shndx_, |
1201 | &symbols_size, | |
1202 | false); | |
1203 | ||
1204 | unsigned int symbol_names_shndx = this->section_link(this->symtab_shndx_); | |
8383303e | 1205 | section_size_type names_size; |
f7e2ee48 ILT |
1206 | const unsigned char* symbol_names_u = |
1207 | this->section_contents(symbol_names_shndx, &names_size, false); | |
1208 | const char* symbol_names = reinterpret_cast<const char*>(symbol_names_u); | |
1209 | ||
1210 | const int sym_size = This::sym_size; | |
1211 | const size_t count = symbols_size / sym_size; | |
1212 | ||
1213 | const unsigned char* p = symbols; | |
1214 | for (size_t i = 0; i < count; ++i, p += sym_size) | |
1215 | { | |
1216 | elfcpp::Sym<size, big_endian> sym(p); | |
1217 | ||
1218 | if (sym.get_st_type() == elfcpp::STT_FILE) | |
1219 | { | |
1220 | if (sym.get_st_name() >= names_size) | |
1221 | info->source_file = "(invalid)"; | |
1222 | else | |
1223 | info->source_file = symbol_names + sym.get_st_name(); | |
1224 | } | |
1225 | else if (sym.get_st_shndx() == shndx | |
1226 | && static_cast<off_t>(sym.get_st_value()) <= offset | |
1227 | && (static_cast<off_t>(sym.get_st_value() + sym.get_st_size()) | |
5c2c6c95 | 1228 | > offset)) |
f7e2ee48 ILT |
1229 | { |
1230 | if (sym.get_st_name() > names_size) | |
1231 | info->enclosing_symbol_name = "(invalid)"; | |
1232 | else | |
a2b1aa12 ILT |
1233 | { |
1234 | info->enclosing_symbol_name = symbol_names + sym.get_st_name(); | |
086a1841 | 1235 | if (parameters->options().do_demangle()) |
a2b1aa12 ILT |
1236 | { |
1237 | char* demangled_name = cplus_demangle( | |
1238 | info->enclosing_symbol_name.c_str(), | |
1239 | DMGL_ANSI | DMGL_PARAMS); | |
1240 | if (demangled_name != NULL) | |
1241 | { | |
1242 | info->enclosing_symbol_name.assign(demangled_name); | |
1243 | free(demangled_name); | |
1244 | } | |
1245 | } | |
1246 | } | |
f7e2ee48 ILT |
1247 | return true; |
1248 | } | |
1249 | } | |
1250 | ||
1251 | return false; | |
1252 | } | |
1253 | ||
54dc6425 ILT |
1254 | // Input_objects methods. |
1255 | ||
008db82e ILT |
1256 | // Add a regular relocatable object to the list. Return false if this |
1257 | // object should be ignored. | |
f6ce93d6 | 1258 | |
008db82e | 1259 | bool |
54dc6425 ILT |
1260 | Input_objects::add_object(Object* obj) |
1261 | { | |
fbfba508 | 1262 | // Set the global target from the first object file we recognize. |
019cdb1a | 1263 | Target* target = obj->target(); |
8851ecca | 1264 | if (!parameters->target_valid()) |
fbfba508 | 1265 | set_parameters_target(target); |
8851ecca | 1266 | else if (target != ¶meters->target()) |
019cdb1a | 1267 | { |
fbfba508 | 1268 | obj->error(_("incompatible target")); |
019cdb1a ILT |
1269 | return false; |
1270 | } | |
1271 | ||
c5818ff1 CC |
1272 | // Print the filename if the -t/--trace option is selected. |
1273 | if (parameters->options().trace()) | |
1274 | gold_info("%s", obj->name().c_str()); | |
1275 | ||
008db82e | 1276 | if (!obj->is_dynamic()) |
f6ce93d6 | 1277 | this->relobj_list_.push_back(static_cast<Relobj*>(obj)); |
008db82e ILT |
1278 | else |
1279 | { | |
1280 | // See if this is a duplicate SONAME. | |
1281 | Dynobj* dynobj = static_cast<Dynobj*>(obj); | |
9a2d6984 | 1282 | const char* soname = dynobj->soname(); |
008db82e ILT |
1283 | |
1284 | std::pair<Unordered_set<std::string>::iterator, bool> ins = | |
9a2d6984 | 1285 | this->sonames_.insert(soname); |
008db82e ILT |
1286 | if (!ins.second) |
1287 | { | |
1288 | // We have already seen a dynamic object with this soname. | |
1289 | return false; | |
1290 | } | |
1291 | ||
1292 | this->dynobj_list_.push_back(dynobj); | |
9a2d6984 ILT |
1293 | |
1294 | // If this is -lc, remember the directory in which we found it. | |
1295 | // We use this when issuing warnings about undefined symbols: as | |
1296 | // a heuristic, we don't warn about system libraries found in | |
1297 | // the same directory as -lc. | |
1298 | if (strncmp(soname, "libc.so", 7) == 0) | |
1299 | { | |
1300 | const char* object_name = dynobj->name().c_str(); | |
1301 | const char* base = lbasename(object_name); | |
1302 | if (base != object_name) | |
1303 | this->system_library_directory_.assign(object_name, | |
1304 | base - 1 - object_name); | |
1305 | } | |
008db82e | 1306 | } |
75f65a3e | 1307 | |
008db82e | 1308 | return true; |
54dc6425 ILT |
1309 | } |
1310 | ||
9a2d6984 ILT |
1311 | // Return whether an object was found in the system library directory. |
1312 | ||
1313 | bool | |
1314 | Input_objects::found_in_system_library_directory(const Object* object) const | |
1315 | { | |
1316 | return (!this->system_library_directory_.empty() | |
1317 | && object->name().compare(0, | |
1318 | this->system_library_directory_.size(), | |
1319 | this->system_library_directory_) == 0); | |
1320 | } | |
1321 | ||
e2827e5f ILT |
1322 | // For each dynamic object, record whether we've seen all of its |
1323 | // explicit dependencies. | |
1324 | ||
1325 | void | |
1326 | Input_objects::check_dynamic_dependencies() const | |
1327 | { | |
1328 | for (Dynobj_list::const_iterator p = this->dynobj_list_.begin(); | |
1329 | p != this->dynobj_list_.end(); | |
1330 | ++p) | |
1331 | { | |
1332 | const Dynobj::Needed& needed((*p)->needed()); | |
1333 | bool found_all = true; | |
1334 | for (Dynobj::Needed::const_iterator pneeded = needed.begin(); | |
1335 | pneeded != needed.end(); | |
1336 | ++pneeded) | |
1337 | { | |
1338 | if (this->sonames_.find(*pneeded) == this->sonames_.end()) | |
1339 | { | |
1340 | found_all = false; | |
1341 | break; | |
1342 | } | |
1343 | } | |
1344 | (*p)->set_has_unknown_needed_entries(!found_all); | |
1345 | } | |
1346 | } | |
1347 | ||
92e059d8 ILT |
1348 | // Relocate_info methods. |
1349 | ||
1350 | // Return a string describing the location of a relocation. This is | |
1351 | // only used in error messages. | |
1352 | ||
1353 | template<int size, bool big_endian> | |
1354 | std::string | |
f7e2ee48 | 1355 | Relocate_info<size, big_endian>::location(size_t, off_t offset) const |
92e059d8 | 1356 | { |
5c2c6c95 ILT |
1357 | // See if we can get line-number information from debugging sections. |
1358 | std::string filename; | |
1359 | std::string file_and_lineno; // Better than filename-only, if available. | |
4c50553d | 1360 | |
a55ce7fe | 1361 | Sized_dwarf_line_info<size, big_endian> line_info(this->object); |
24badc65 ILT |
1362 | // This will be "" if we failed to parse the debug info for any reason. |
1363 | file_and_lineno = line_info.addr2line(this->data_shndx, offset); | |
4c50553d | 1364 | |
92e059d8 | 1365 | std::string ret(this->object->name()); |
f7e2ee48 ILT |
1366 | ret += ':'; |
1367 | Symbol_location_info info; | |
1368 | if (this->object->get_symbol_location_info(this->data_shndx, offset, &info)) | |
1369 | { | |
1370 | ret += " in function "; | |
1371 | ret += info.enclosing_symbol_name; | |
1372 | ret += ":"; | |
5c2c6c95 ILT |
1373 | filename = info.source_file; |
1374 | } | |
1375 | ||
1376 | if (!file_and_lineno.empty()) | |
1377 | ret += file_and_lineno; | |
1378 | else | |
1379 | { | |
1380 | if (!filename.empty()) | |
1381 | ret += filename; | |
1382 | ret += "("; | |
1383 | ret += this->object->section_name(this->data_shndx); | |
1384 | char buf[100]; | |
1385 | // Offsets into sections have to be positive. | |
1386 | snprintf(buf, sizeof(buf), "+0x%lx", static_cast<long>(offset)); | |
1387 | ret += buf; | |
1388 | ret += ")"; | |
f7e2ee48 | 1389 | } |
92e059d8 ILT |
1390 | return ret; |
1391 | } | |
1392 | ||
bae7f79e ILT |
1393 | } // End namespace gold. |
1394 | ||
1395 | namespace | |
1396 | { | |
1397 | ||
1398 | using namespace gold; | |
1399 | ||
1400 | // Read an ELF file with the header and return the appropriate | |
1401 | // instance of Object. | |
1402 | ||
1403 | template<int size, bool big_endian> | |
1404 | Object* | |
1405 | make_elf_sized_object(const std::string& name, Input_file* input_file, | |
1406 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1407 | { | |
1408 | int et = ehdr.get_e_type(); | |
bae7f79e ILT |
1409 | if (et == elfcpp::ET_REL) |
1410 | { | |
f6ce93d6 ILT |
1411 | Sized_relobj<size, big_endian>* obj = |
1412 | new Sized_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
bae7f79e ILT |
1413 | obj->setup(ehdr); |
1414 | return obj; | |
1415 | } | |
dbe717ef ILT |
1416 | else if (et == elfcpp::ET_DYN) |
1417 | { | |
1418 | Sized_dynobj<size, big_endian>* obj = | |
1419 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
1420 | obj->setup(ehdr); | |
1421 | return obj; | |
1422 | } | |
bae7f79e ILT |
1423 | else |
1424 | { | |
75f2446e ILT |
1425 | gold_error(_("%s: unsupported ELF file type %d"), |
1426 | name.c_str(), et); | |
1427 | return NULL; | |
bae7f79e ILT |
1428 | } |
1429 | } | |
1430 | ||
1431 | } // End anonymous namespace. | |
1432 | ||
1433 | namespace gold | |
1434 | { | |
1435 | ||
1436 | // Read an ELF file and return the appropriate instance of Object. | |
1437 | ||
1438 | Object* | |
1439 | make_elf_object(const std::string& name, Input_file* input_file, off_t offset, | |
8383303e | 1440 | const unsigned char* p, section_offset_type bytes) |
bae7f79e ILT |
1441 | { |
1442 | if (bytes < elfcpp::EI_NIDENT) | |
1443 | { | |
75f2446e ILT |
1444 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1445 | return NULL; | |
bae7f79e ILT |
1446 | } |
1447 | ||
1448 | int v = p[elfcpp::EI_VERSION]; | |
1449 | if (v != elfcpp::EV_CURRENT) | |
1450 | { | |
1451 | if (v == elfcpp::EV_NONE) | |
75f2446e | 1452 | gold_error(_("%s: invalid ELF version 0"), name.c_str()); |
bae7f79e | 1453 | else |
75f2446e ILT |
1454 | gold_error(_("%s: unsupported ELF version %d"), name.c_str(), v); |
1455 | return NULL; | |
bae7f79e ILT |
1456 | } |
1457 | ||
1458 | int c = p[elfcpp::EI_CLASS]; | |
1459 | if (c == elfcpp::ELFCLASSNONE) | |
1460 | { | |
75f2446e ILT |
1461 | gold_error(_("%s: invalid ELF class 0"), name.c_str()); |
1462 | return NULL; | |
bae7f79e ILT |
1463 | } |
1464 | else if (c != elfcpp::ELFCLASS32 | |
1465 | && c != elfcpp::ELFCLASS64) | |
1466 | { | |
75f2446e ILT |
1467 | gold_error(_("%s: unsupported ELF class %d"), name.c_str(), c); |
1468 | return NULL; | |
bae7f79e ILT |
1469 | } |
1470 | ||
1471 | int d = p[elfcpp::EI_DATA]; | |
1472 | if (d == elfcpp::ELFDATANONE) | |
1473 | { | |
75f2446e ILT |
1474 | gold_error(_("%s: invalid ELF data encoding"), name.c_str()); |
1475 | return NULL; | |
bae7f79e ILT |
1476 | } |
1477 | else if (d != elfcpp::ELFDATA2LSB | |
1478 | && d != elfcpp::ELFDATA2MSB) | |
1479 | { | |
75f2446e ILT |
1480 | gold_error(_("%s: unsupported ELF data encoding %d"), name.c_str(), d); |
1481 | return NULL; | |
bae7f79e ILT |
1482 | } |
1483 | ||
1484 | bool big_endian = d == elfcpp::ELFDATA2MSB; | |
1485 | ||
1486 | if (c == elfcpp::ELFCLASS32) | |
1487 | { | |
1488 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
1489 | { | |
75f2446e ILT |
1490 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1491 | return NULL; | |
bae7f79e ILT |
1492 | } |
1493 | if (big_endian) | |
1494 | { | |
193a53d9 | 1495 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e ILT |
1496 | elfcpp::Ehdr<32, true> ehdr(p); |
1497 | return make_elf_sized_object<32, true>(name, input_file, | |
1498 | offset, ehdr); | |
193a53d9 | 1499 | #else |
75f2446e ILT |
1500 | gold_error(_("%s: not configured to support " |
1501 | "32-bit big-endian object"), | |
1502 | name.c_str()); | |
1503 | return NULL; | |
193a53d9 | 1504 | #endif |
bae7f79e ILT |
1505 | } |
1506 | else | |
1507 | { | |
193a53d9 | 1508 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e ILT |
1509 | elfcpp::Ehdr<32, false> ehdr(p); |
1510 | return make_elf_sized_object<32, false>(name, input_file, | |
1511 | offset, ehdr); | |
193a53d9 | 1512 | #else |
75f2446e ILT |
1513 | gold_error(_("%s: not configured to support " |
1514 | "32-bit little-endian object"), | |
1515 | name.c_str()); | |
1516 | return NULL; | |
193a53d9 | 1517 | #endif |
bae7f79e ILT |
1518 | } |
1519 | } | |
1520 | else | |
1521 | { | |
1522 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
1523 | { | |
75f2446e ILT |
1524 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1525 | return NULL; | |
bae7f79e ILT |
1526 | } |
1527 | if (big_endian) | |
1528 | { | |
193a53d9 | 1529 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e ILT |
1530 | elfcpp::Ehdr<64, true> ehdr(p); |
1531 | return make_elf_sized_object<64, true>(name, input_file, | |
1532 | offset, ehdr); | |
193a53d9 | 1533 | #else |
75f2446e ILT |
1534 | gold_error(_("%s: not configured to support " |
1535 | "64-bit big-endian object"), | |
1536 | name.c_str()); | |
1537 | return NULL; | |
193a53d9 | 1538 | #endif |
bae7f79e ILT |
1539 | } |
1540 | else | |
1541 | { | |
193a53d9 | 1542 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e ILT |
1543 | elfcpp::Ehdr<64, false> ehdr(p); |
1544 | return make_elf_sized_object<64, false>(name, input_file, | |
1545 | offset, ehdr); | |
193a53d9 | 1546 | #else |
75f2446e ILT |
1547 | gold_error(_("%s: not configured to support " |
1548 | "64-bit little-endian object"), | |
1549 | name.c_str()); | |
1550 | return NULL; | |
193a53d9 | 1551 | #endif |
bae7f79e ILT |
1552 | } |
1553 | } | |
1554 | } | |
1555 | ||
04bf7072 ILT |
1556 | // Instantiate the templates we need. |
1557 | ||
1558 | #ifdef HAVE_TARGET_32_LITTLE | |
1559 | template | |
1560 | void | |
1561 | Object::read_section_data<32, false>(elfcpp::Elf_file<32, false, Object>*, | |
1562 | Read_symbols_data*); | |
1563 | #endif | |
1564 | ||
1565 | #ifdef HAVE_TARGET_32_BIG | |
1566 | template | |
1567 | void | |
1568 | Object::read_section_data<32, true>(elfcpp::Elf_file<32, true, Object>*, | |
1569 | Read_symbols_data*); | |
1570 | #endif | |
1571 | ||
1572 | #ifdef HAVE_TARGET_64_LITTLE | |
1573 | template | |
1574 | void | |
1575 | Object::read_section_data<64, false>(elfcpp::Elf_file<64, false, Object>*, | |
1576 | Read_symbols_data*); | |
1577 | #endif | |
1578 | ||
1579 | #ifdef HAVE_TARGET_64_BIG | |
1580 | template | |
1581 | void | |
1582 | Object::read_section_data<64, true>(elfcpp::Elf_file<64, true, Object>*, | |
1583 | Read_symbols_data*); | |
1584 | #endif | |
bae7f79e | 1585 | |
193a53d9 | 1586 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e | 1587 | template |
f6ce93d6 | 1588 | class Sized_relobj<32, false>; |
193a53d9 | 1589 | #endif |
bae7f79e | 1590 | |
193a53d9 | 1591 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e | 1592 | template |
f6ce93d6 | 1593 | class Sized_relobj<32, true>; |
193a53d9 | 1594 | #endif |
bae7f79e | 1595 | |
193a53d9 | 1596 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e | 1597 | template |
f6ce93d6 | 1598 | class Sized_relobj<64, false>; |
193a53d9 | 1599 | #endif |
bae7f79e | 1600 | |
193a53d9 | 1601 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e | 1602 | template |
f6ce93d6 | 1603 | class Sized_relobj<64, true>; |
193a53d9 | 1604 | #endif |
bae7f79e | 1605 | |
193a53d9 | 1606 | #ifdef HAVE_TARGET_32_LITTLE |
92e059d8 ILT |
1607 | template |
1608 | struct Relocate_info<32, false>; | |
193a53d9 | 1609 | #endif |
92e059d8 | 1610 | |
193a53d9 | 1611 | #ifdef HAVE_TARGET_32_BIG |
92e059d8 ILT |
1612 | template |
1613 | struct Relocate_info<32, true>; | |
193a53d9 | 1614 | #endif |
92e059d8 | 1615 | |
193a53d9 | 1616 | #ifdef HAVE_TARGET_64_LITTLE |
92e059d8 ILT |
1617 | template |
1618 | struct Relocate_info<64, false>; | |
193a53d9 | 1619 | #endif |
92e059d8 | 1620 | |
193a53d9 | 1621 | #ifdef HAVE_TARGET_64_BIG |
92e059d8 ILT |
1622 | template |
1623 | struct Relocate_info<64, true>; | |
193a53d9 | 1624 | #endif |
92e059d8 | 1625 | |
bae7f79e | 1626 | } // End namespace gold. |