Commit | Line | Data |
---|---|---|
bae7f79e ILT |
1 | // object.cc -- support for an object file for linking in gold |
2 | ||
6cb15b7f ILT |
3 | // Copyright 2006, 2007 Free Software Foundation, Inc. |
4 | // Written by Ian Lance Taylor <iant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
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 ILT |
82 | *plen = convert_to_section_size_type(loc.data_size); |
83 | return this->get_view(loc.file_offset, *plen, 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(); | |
9eb9fa57 | 99 | sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size, true); |
dbe717ef ILT |
100 | |
101 | // Read the section names. | |
102 | const unsigned char* pshdrs = sd->section_headers->data(); | |
103 | const unsigned char* pshdrnames = pshdrs + elf_file->shstrndx() * shdr_size; | |
104 | typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames); | |
105 | ||
106 | if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB) | |
75f2446e ILT |
107 | this->error(_("section name section has wrong type: %u"), |
108 | static_cast<unsigned int>(shdrnames.get_sh_type())); | |
dbe717ef | 109 | |
8383303e ILT |
110 | sd->section_names_size = |
111 | convert_to_section_size_type(shdrnames.get_sh_size()); | |
dbe717ef | 112 | sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(), |
9eb9fa57 | 113 | sd->section_names_size, false); |
dbe717ef ILT |
114 | } |
115 | ||
116 | // If NAME is the name of a special .gnu.warning section, arrange for | |
117 | // the warning to be issued. SHNDX is the section index. Return | |
118 | // whether it is a warning section. | |
119 | ||
120 | bool | |
121 | Object::handle_gnu_warning_section(const char* name, unsigned int shndx, | |
122 | Symbol_table* symtab) | |
123 | { | |
124 | const char warn_prefix[] = ".gnu.warning."; | |
125 | const int warn_prefix_len = sizeof warn_prefix - 1; | |
126 | if (strncmp(name, warn_prefix, warn_prefix_len) == 0) | |
127 | { | |
cb295612 ILT |
128 | // Read the section contents to get the warning text. It would |
129 | // be nicer if we only did this if we have to actually issue a | |
130 | // warning. Unfortunately, warnings are issued as we relocate | |
131 | // sections. That means that we can not lock the object then, | |
132 | // as we might try to issue the same warning multiple times | |
133 | // simultaneously. | |
134 | section_size_type len; | |
135 | const unsigned char* contents = this->section_contents(shndx, &len, | |
136 | false); | |
137 | std::string warning(reinterpret_cast<const char*>(contents), len); | |
138 | symtab->add_warning(name + warn_prefix_len, this, warning); | |
dbe717ef ILT |
139 | return true; |
140 | } | |
141 | return false; | |
142 | } | |
143 | ||
f6ce93d6 | 144 | // Class Sized_relobj. |
bae7f79e ILT |
145 | |
146 | template<int size, bool big_endian> | |
f6ce93d6 | 147 | Sized_relobj<size, big_endian>::Sized_relobj( |
bae7f79e ILT |
148 | const std::string& name, |
149 | Input_file* input_file, | |
150 | off_t offset, | |
151 | const elfcpp::Ehdr<size, big_endian>& ehdr) | |
f6ce93d6 | 152 | : Relobj(name, input_file, offset), |
645f8123 | 153 | elf_file_(this, ehdr), |
dbe717ef | 154 | symtab_shndx_(-1U), |
61ba1cf9 ILT |
155 | local_symbol_count_(0), |
156 | output_local_symbol_count_(0), | |
7bf1f802 | 157 | output_local_dynsym_count_(0), |
730cdc88 | 158 | symbols_(), |
61ba1cf9 | 159 | local_symbol_offset_(0), |
7bf1f802 | 160 | local_dynsym_offset_(0), |
e727fa71 | 161 | local_values_(), |
730cdc88 ILT |
162 | local_got_offsets_(), |
163 | has_eh_frame_(false) | |
bae7f79e | 164 | { |
bae7f79e ILT |
165 | } |
166 | ||
167 | template<int size, bool big_endian> | |
f6ce93d6 | 168 | Sized_relobj<size, big_endian>::~Sized_relobj() |
bae7f79e ILT |
169 | { |
170 | } | |
171 | ||
645f8123 | 172 | // Set up an object file based on the file header. This sets up the |
bae7f79e ILT |
173 | // target and reads the section information. |
174 | ||
175 | template<int size, bool big_endian> | |
176 | void | |
f6ce93d6 | 177 | Sized_relobj<size, big_endian>::setup( |
bae7f79e ILT |
178 | const elfcpp::Ehdr<size, big_endian>& ehdr) |
179 | { | |
dbe717ef ILT |
180 | this->set_target(ehdr.get_e_machine(), size, big_endian, |
181 | ehdr.get_e_ident()[elfcpp::EI_OSABI], | |
182 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); | |
12e14209 | 183 | |
dbe717ef | 184 | const unsigned int shnum = this->elf_file_.shnum(); |
a2fb1b05 | 185 | this->set_shnum(shnum); |
dbe717ef | 186 | } |
12e14209 | 187 | |
dbe717ef ILT |
188 | // Find the SHT_SYMTAB section, given the section headers. The ELF |
189 | // standard says that maybe in the future there can be more than one | |
190 | // SHT_SYMTAB section. Until somebody figures out how that could | |
191 | // work, we assume there is only one. | |
12e14209 | 192 | |
dbe717ef ILT |
193 | template<int size, bool big_endian> |
194 | void | |
195 | Sized_relobj<size, big_endian>::find_symtab(const unsigned char* pshdrs) | |
196 | { | |
197 | const unsigned int shnum = this->shnum(); | |
198 | this->symtab_shndx_ = 0; | |
199 | if (shnum > 0) | |
bae7f79e | 200 | { |
dbe717ef ILT |
201 | // Look through the sections in reverse order, since gas tends |
202 | // to put the symbol table at the end. | |
203 | const unsigned char* p = pshdrs + shnum * This::shdr_size; | |
204 | unsigned int i = shnum; | |
205 | while (i > 0) | |
bae7f79e | 206 | { |
dbe717ef ILT |
207 | --i; |
208 | p -= This::shdr_size; | |
209 | typename This::Shdr shdr(p); | |
210 | if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB) | |
211 | { | |
212 | this->symtab_shndx_ = i; | |
213 | break; | |
214 | } | |
bae7f79e | 215 | } |
bae7f79e ILT |
216 | } |
217 | } | |
218 | ||
730cdc88 ILT |
219 | // Return whether SHDR has the right type and flags to be a GNU |
220 | // .eh_frame section. | |
221 | ||
222 | template<int size, bool big_endian> | |
223 | bool | |
224 | Sized_relobj<size, big_endian>::check_eh_frame_flags( | |
225 | const elfcpp::Shdr<size, big_endian>* shdr) const | |
226 | { | |
227 | return (shdr->get_sh_size() > 0 | |
228 | && shdr->get_sh_type() == elfcpp::SHT_PROGBITS | |
229 | && shdr->get_sh_flags() == elfcpp::SHF_ALLOC); | |
230 | } | |
231 | ||
232 | // Return whether there is a GNU .eh_frame section, given the section | |
233 | // headers and the section names. | |
234 | ||
235 | template<int size, bool big_endian> | |
236 | bool | |
8383303e ILT |
237 | Sized_relobj<size, big_endian>::find_eh_frame( |
238 | const unsigned char* pshdrs, | |
239 | const char* names, | |
240 | section_size_type names_size) const | |
730cdc88 ILT |
241 | { |
242 | const unsigned int shnum = this->shnum(); | |
243 | const unsigned char* p = pshdrs + This::shdr_size; | |
244 | for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size) | |
245 | { | |
246 | typename This::Shdr shdr(p); | |
247 | if (this->check_eh_frame_flags(&shdr)) | |
248 | { | |
249 | if (shdr.get_sh_name() >= names_size) | |
250 | { | |
251 | this->error(_("bad section name offset for section %u: %lu"), | |
252 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
253 | continue; | |
254 | } | |
255 | ||
256 | const char* name = names + shdr.get_sh_name(); | |
257 | if (strcmp(name, ".eh_frame") == 0) | |
258 | return true; | |
259 | } | |
260 | } | |
261 | return false; | |
262 | } | |
263 | ||
12e14209 | 264 | // Read the sections and symbols from an object file. |
bae7f79e ILT |
265 | |
266 | template<int size, bool big_endian> | |
12e14209 | 267 | void |
f6ce93d6 | 268 | Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) |
bae7f79e | 269 | { |
dbe717ef | 270 | this->read_section_data(&this->elf_file_, sd); |
12e14209 | 271 | |
dbe717ef ILT |
272 | const unsigned char* const pshdrs = sd->section_headers->data(); |
273 | ||
274 | this->find_symtab(pshdrs); | |
12e14209 | 275 | |
730cdc88 ILT |
276 | const unsigned char* namesu = sd->section_names->data(); |
277 | const char* names = reinterpret_cast<const char*>(namesu); | |
278 | if (this->find_eh_frame(pshdrs, names, sd->section_names_size)) | |
279 | this->has_eh_frame_ = true; | |
280 | ||
75f2446e ILT |
281 | sd->symbols = NULL; |
282 | sd->symbols_size = 0; | |
730cdc88 | 283 | sd->external_symbols_offset = 0; |
75f2446e ILT |
284 | sd->symbol_names = NULL; |
285 | sd->symbol_names_size = 0; | |
286 | ||
645f8123 | 287 | if (this->symtab_shndx_ == 0) |
bae7f79e ILT |
288 | { |
289 | // No symbol table. Weird but legal. | |
12e14209 | 290 | return; |
bae7f79e ILT |
291 | } |
292 | ||
12e14209 ILT |
293 | // Get the symbol table section header. |
294 | typename This::Shdr symtabshdr(pshdrs | |
645f8123 | 295 | + this->symtab_shndx_ * This::shdr_size); |
a3ad94ed | 296 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
bae7f79e | 297 | |
730cdc88 ILT |
298 | // If this object has a .eh_frame section, we need all the symbols. |
299 | // Otherwise we only need the external symbols. While it would be | |
300 | // simpler to just always read all the symbols, I've seen object | |
301 | // files with well over 2000 local symbols, which for a 64-bit | |
302 | // object file format is over 5 pages that we don't need to read | |
303 | // now. | |
304 | ||
75f65a3e | 305 | const int sym_size = This::sym_size; |
92e059d8 ILT |
306 | const unsigned int loccount = symtabshdr.get_sh_info(); |
307 | this->local_symbol_count_ = loccount; | |
7bf1f802 | 308 | this->local_values_.resize(loccount); |
8383303e | 309 | section_offset_type locsize = loccount * sym_size; |
730cdc88 | 310 | off_t dataoff = symtabshdr.get_sh_offset(); |
8383303e ILT |
311 | section_size_type datasize = |
312 | convert_to_section_size_type(symtabshdr.get_sh_size()); | |
730cdc88 | 313 | off_t extoff = dataoff + locsize; |
8383303e | 314 | section_size_type extsize = datasize - locsize; |
75f65a3e | 315 | |
730cdc88 | 316 | off_t readoff = this->has_eh_frame_ ? dataoff : extoff; |
8383303e | 317 | section_size_type readsize = this->has_eh_frame_ ? datasize : extsize; |
730cdc88 ILT |
318 | |
319 | File_view* fvsymtab = this->get_lasting_view(readoff, readsize, false); | |
bae7f79e ILT |
320 | |
321 | // Read the section header for the symbol names. | |
dbe717ef ILT |
322 | unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
323 | if (strtab_shndx >= this->shnum()) | |
bae7f79e | 324 | { |
75f2446e ILT |
325 | this->error(_("invalid symbol table name index: %u"), strtab_shndx); |
326 | return; | |
bae7f79e | 327 | } |
dbe717ef | 328 | typename This::Shdr strtabshdr(pshdrs + strtab_shndx * This::shdr_size); |
bae7f79e ILT |
329 | if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB) |
330 | { | |
75f2446e ILT |
331 | this->error(_("symbol table name section has wrong type: %u"), |
332 | static_cast<unsigned int>(strtabshdr.get_sh_type())); | |
333 | return; | |
bae7f79e ILT |
334 | } |
335 | ||
336 | // Read the symbol names. | |
337 | File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(), | |
9eb9fa57 | 338 | strtabshdr.get_sh_size(), true); |
bae7f79e | 339 | |
12e14209 | 340 | sd->symbols = fvsymtab; |
730cdc88 ILT |
341 | sd->symbols_size = readsize; |
342 | sd->external_symbols_offset = this->has_eh_frame_ ? locsize : 0; | |
12e14209 | 343 | sd->symbol_names = fvstrtab; |
8383303e ILT |
344 | sd->symbol_names_size = |
345 | convert_to_section_size_type(strtabshdr.get_sh_size()); | |
a2fb1b05 ILT |
346 | } |
347 | ||
730cdc88 ILT |
348 | // Return the section index of symbol SYM. Set *VALUE to its value in |
349 | // the object file. Note that for a symbol which is not defined in | |
350 | // this object file, this will set *VALUE to 0 and return SHN_UNDEF; | |
351 | // it will not return the final value of the symbol in the link. | |
352 | ||
353 | template<int size, bool big_endian> | |
354 | unsigned int | |
355 | Sized_relobj<size, big_endian>::symbol_section_and_value(unsigned int sym, | |
356 | Address* value) | |
357 | { | |
8383303e | 358 | section_size_type symbols_size; |
730cdc88 ILT |
359 | const unsigned char* symbols = this->section_contents(this->symtab_shndx_, |
360 | &symbols_size, | |
361 | false); | |
362 | ||
363 | const size_t count = symbols_size / This::sym_size; | |
364 | gold_assert(sym < count); | |
365 | ||
366 | elfcpp::Sym<size, big_endian> elfsym(symbols + sym * This::sym_size); | |
367 | *value = elfsym.get_st_value(); | |
368 | // FIXME: Handle SHN_XINDEX. | |
369 | return elfsym.get_st_shndx(); | |
370 | } | |
371 | ||
a2fb1b05 ILT |
372 | // Return whether to include a section group in the link. LAYOUT is |
373 | // used to keep track of which section groups we have already seen. | |
374 | // INDEX is the index of the section group and SHDR is the section | |
375 | // header. If we do not want to include this group, we set bits in | |
376 | // OMIT for each section which should be discarded. | |
377 | ||
378 | template<int size, bool big_endian> | |
379 | bool | |
f6ce93d6 | 380 | Sized_relobj<size, big_endian>::include_section_group( |
6a74a719 | 381 | Symbol_table* symtab, |
a2fb1b05 ILT |
382 | Layout* layout, |
383 | unsigned int index, | |
6a74a719 | 384 | const char* name, |
a2fb1b05 ILT |
385 | const elfcpp::Shdr<size, big_endian>& shdr, |
386 | std::vector<bool>* omit) | |
387 | { | |
388 | // Read the section contents. | |
389 | const unsigned char* pcon = this->get_view(shdr.get_sh_offset(), | |
9eb9fa57 | 390 | shdr.get_sh_size(), false); |
a2fb1b05 ILT |
391 | const elfcpp::Elf_Word* pword = |
392 | reinterpret_cast<const elfcpp::Elf_Word*>(pcon); | |
393 | ||
394 | // The first word contains flags. We only care about COMDAT section | |
395 | // groups. Other section groups are always included in the link | |
396 | // just like ordinary sections. | |
f6ce93d6 | 397 | elfcpp::Elf_Word flags = elfcpp::Swap<32, big_endian>::readval(pword); |
a2fb1b05 ILT |
398 | |
399 | // Look up the group signature, which is the name of a symbol. This | |
400 | // is a lot of effort to go to to read a string. Why didn't they | |
6a74a719 ILT |
401 | // just have the group signature point into the string table, rather |
402 | // than indirect through a symbol? | |
a2fb1b05 ILT |
403 | |
404 | // Get the appropriate symbol table header (this will normally be | |
405 | // the single SHT_SYMTAB section, but in principle it need not be). | |
645f8123 ILT |
406 | const unsigned int link = shdr.get_sh_link(); |
407 | typename This::Shdr symshdr(this, this->elf_file_.section_header(link)); | |
a2fb1b05 ILT |
408 | |
409 | // Read the symbol table entry. | |
410 | if (shdr.get_sh_info() >= symshdr.get_sh_size() / This::sym_size) | |
411 | { | |
75f2446e ILT |
412 | this->error(_("section group %u info %u out of range"), |
413 | index, shdr.get_sh_info()); | |
414 | return false; | |
a2fb1b05 ILT |
415 | } |
416 | off_t symoff = symshdr.get_sh_offset() + shdr.get_sh_info() * This::sym_size; | |
cb295612 | 417 | const unsigned char* psym = this->get_view(symoff, This::sym_size, false); |
a2fb1b05 ILT |
418 | elfcpp::Sym<size, big_endian> sym(psym); |
419 | ||
a2fb1b05 | 420 | // Read the symbol table names. |
8383303e | 421 | section_size_type symnamelen; |
645f8123 | 422 | const unsigned char* psymnamesu; |
9eb9fa57 ILT |
423 | psymnamesu = this->section_contents(symshdr.get_sh_link(), &symnamelen, |
424 | true); | |
a2fb1b05 ILT |
425 | const char* psymnames = reinterpret_cast<const char*>(psymnamesu); |
426 | ||
427 | // Get the section group signature. | |
645f8123 | 428 | if (sym.get_st_name() >= symnamelen) |
a2fb1b05 | 429 | { |
75f2446e ILT |
430 | this->error(_("symbol %u name offset %u out of range"), |
431 | shdr.get_sh_info(), sym.get_st_name()); | |
432 | return false; | |
a2fb1b05 ILT |
433 | } |
434 | ||
435 | const char* signature = psymnames + sym.get_st_name(); | |
436 | ||
ead1e424 ILT |
437 | // It seems that some versions of gas will create a section group |
438 | // associated with a section symbol, and then fail to give a name to | |
439 | // the section symbol. In such a case, use the name of the section. | |
440 | // FIXME. | |
645f8123 ILT |
441 | std::string secname; |
442 | if (signature[0] == '\0' && sym.get_st_type() == elfcpp::STT_SECTION) | |
ead1e424 | 443 | { |
645f8123 ILT |
444 | secname = this->section_name(sym.get_st_shndx()); |
445 | signature = secname.c_str(); | |
ead1e424 ILT |
446 | } |
447 | ||
a2fb1b05 ILT |
448 | // Record this section group, and see whether we've already seen one |
449 | // with the same signature. | |
6a74a719 ILT |
450 | |
451 | if ((flags & elfcpp::GRP_COMDAT) == 0 | |
452 | || layout->add_comdat(signature, true)) | |
453 | { | |
8851ecca | 454 | if (parameters->options().relocatable()) |
6a74a719 ILT |
455 | layout->layout_group(symtab, this, index, name, signature, shdr, |
456 | pword); | |
457 | return true; | |
458 | } | |
a2fb1b05 ILT |
459 | |
460 | // This is a duplicate. We want to discard the sections in this | |
461 | // group. | |
462 | size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word); | |
463 | for (size_t i = 1; i < count; ++i) | |
464 | { | |
f6ce93d6 ILT |
465 | elfcpp::Elf_Word secnum = |
466 | elfcpp::Swap<32, big_endian>::readval(pword + i); | |
a2fb1b05 ILT |
467 | if (secnum >= this->shnum()) |
468 | { | |
75f2446e ILT |
469 | this->error(_("section %u in section group %u out of range"), |
470 | secnum, index); | |
471 | continue; | |
a2fb1b05 ILT |
472 | } |
473 | (*omit)[secnum] = true; | |
474 | } | |
475 | ||
476 | return false; | |
477 | } | |
478 | ||
479 | // Whether to include a linkonce section in the link. NAME is the | |
480 | // name of the section and SHDR is the section header. | |
481 | ||
482 | // Linkonce sections are a GNU extension implemented in the original | |
483 | // GNU linker before section groups were defined. The semantics are | |
484 | // that we only include one linkonce section with a given name. The | |
485 | // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME, | |
486 | // where T is the type of section and SYMNAME is the name of a symbol. | |
487 | // In an attempt to make linkonce sections interact well with section | |
488 | // groups, we try to identify SYMNAME and use it like a section group | |
489 | // signature. We want to block section groups with that signature, | |
490 | // but not other linkonce sections with that signature. We also use | |
491 | // the full name of the linkonce section as a normal section group | |
492 | // signature. | |
493 | ||
494 | template<int size, bool big_endian> | |
495 | bool | |
f6ce93d6 | 496 | Sized_relobj<size, big_endian>::include_linkonce_section( |
a2fb1b05 ILT |
497 | Layout* layout, |
498 | const char* name, | |
499 | const elfcpp::Shdr<size, big_endian>&) | |
500 | { | |
ad435a24 ILT |
501 | // In general the symbol name we want will be the string following |
502 | // the last '.'. However, we have to handle the case of | |
503 | // .gnu.linkonce.t.__i686.get_pc_thunk.bx, which was generated by | |
504 | // some versions of gcc. So we use a heuristic: if the name starts | |
505 | // with ".gnu.linkonce.t.", we use everything after that. Otherwise | |
506 | // we look for the last '.'. We can't always simply skip | |
507 | // ".gnu.linkonce.X", because we have to deal with cases like | |
508 | // ".gnu.linkonce.d.rel.ro.local". | |
509 | const char* const linkonce_t = ".gnu.linkonce.t."; | |
510 | const char* symname; | |
511 | if (strncmp(name, linkonce_t, strlen(linkonce_t)) == 0) | |
512 | symname = name + strlen(linkonce_t); | |
513 | else | |
514 | symname = strrchr(name, '.') + 1; | |
a783673b ILT |
515 | bool include1 = layout->add_comdat(symname, false); |
516 | bool include2 = layout->add_comdat(name, true); | |
517 | return include1 && include2; | |
a2fb1b05 ILT |
518 | } |
519 | ||
520 | // Lay out the input sections. We walk through the sections and check | |
521 | // whether they should be included in the link. If they should, we | |
522 | // pass them to the Layout object, which will return an output section | |
523 | // and an offset. | |
524 | ||
525 | template<int size, bool big_endian> | |
526 | void | |
7e1edb90 | 527 | Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab, |
f6ce93d6 | 528 | Layout* layout, |
12e14209 | 529 | Read_symbols_data* sd) |
a2fb1b05 | 530 | { |
dbe717ef | 531 | const unsigned int shnum = this->shnum(); |
12e14209 ILT |
532 | if (shnum == 0) |
533 | return; | |
a2fb1b05 ILT |
534 | |
535 | // Get the section headers. | |
12e14209 | 536 | const unsigned char* pshdrs = sd->section_headers->data(); |
a2fb1b05 ILT |
537 | |
538 | // Get the section names. | |
12e14209 | 539 | const unsigned char* pnamesu = sd->section_names->data(); |
a2fb1b05 ILT |
540 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
541 | ||
730cdc88 ILT |
542 | // For each section, record the index of the reloc section if any. |
543 | // Use 0 to mean that there is no reloc section, -1U to mean that | |
544 | // there is more than one. | |
545 | std::vector<unsigned int> reloc_shndx(shnum, 0); | |
546 | std::vector<unsigned int> reloc_type(shnum, elfcpp::SHT_NULL); | |
547 | // Skip the first, dummy, section. | |
548 | pshdrs += This::shdr_size; | |
549 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) | |
550 | { | |
551 | typename This::Shdr shdr(pshdrs); | |
552 | ||
553 | unsigned int sh_type = shdr.get_sh_type(); | |
554 | if (sh_type == elfcpp::SHT_REL || sh_type == elfcpp::SHT_RELA) | |
555 | { | |
556 | unsigned int target_shndx = shdr.get_sh_info(); | |
557 | if (target_shndx == 0 || target_shndx >= shnum) | |
558 | { | |
559 | this->error(_("relocation section %u has bad info %u"), | |
560 | i, target_shndx); | |
561 | continue; | |
562 | } | |
563 | ||
564 | if (reloc_shndx[target_shndx] != 0) | |
565 | reloc_shndx[target_shndx] = -1U; | |
566 | else | |
567 | { | |
568 | reloc_shndx[target_shndx] = i; | |
569 | reloc_type[target_shndx] = sh_type; | |
570 | } | |
571 | } | |
572 | } | |
573 | ||
a2fb1b05 | 574 | std::vector<Map_to_output>& map_sections(this->map_to_output()); |
61ba1cf9 | 575 | map_sections.resize(shnum); |
a2fb1b05 | 576 | |
88dd47ac ILT |
577 | // If we are only linking for symbols, then there is nothing else to |
578 | // do here. | |
579 | if (this->input_file()->just_symbols()) | |
580 | { | |
581 | delete sd->section_headers; | |
582 | sd->section_headers = NULL; | |
583 | delete sd->section_names; | |
584 | sd->section_names = NULL; | |
585 | return; | |
586 | } | |
587 | ||
35cdfc9a ILT |
588 | // Whether we've seen a .note.GNU-stack section. |
589 | bool seen_gnu_stack = false; | |
590 | // The flags of a .note.GNU-stack section. | |
591 | uint64_t gnu_stack_flags = 0; | |
592 | ||
a2fb1b05 ILT |
593 | // Keep track of which sections to omit. |
594 | std::vector<bool> omit(shnum, false); | |
595 | ||
7019cd25 | 596 | // Keep track of reloc sections when emitting relocations. |
8851ecca ILT |
597 | const bool relocatable = parameters->options().relocatable(); |
598 | const bool emit_relocs = (relocatable | |
599 | || parameters->options().emit_relocs()); | |
6a74a719 ILT |
600 | std::vector<unsigned int> reloc_sections; |
601 | ||
730cdc88 ILT |
602 | // Keep track of .eh_frame sections. |
603 | std::vector<unsigned int> eh_frame_sections; | |
604 | ||
f6ce93d6 | 605 | // Skip the first, dummy, section. |
730cdc88 | 606 | pshdrs = sd->section_headers->data() + This::shdr_size; |
f6ce93d6 | 607 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) |
a2fb1b05 | 608 | { |
75f65a3e | 609 | typename This::Shdr shdr(pshdrs); |
a2fb1b05 | 610 | |
12e14209 | 611 | if (shdr.get_sh_name() >= sd->section_names_size) |
a2fb1b05 | 612 | { |
75f2446e ILT |
613 | this->error(_("bad section name offset for section %u: %lu"), |
614 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
615 | return; | |
a2fb1b05 ILT |
616 | } |
617 | ||
618 | const char* name = pnames + shdr.get_sh_name(); | |
619 | ||
dbe717ef | 620 | if (this->handle_gnu_warning_section(name, i, symtab)) |
f6ce93d6 | 621 | { |
8851ecca | 622 | if (!relocatable) |
f6ce93d6 ILT |
623 | omit[i] = true; |
624 | } | |
625 | ||
35cdfc9a ILT |
626 | // The .note.GNU-stack section is special. It gives the |
627 | // protection flags that this object file requires for the stack | |
628 | // in memory. | |
629 | if (strcmp(name, ".note.GNU-stack") == 0) | |
630 | { | |
631 | seen_gnu_stack = true; | |
632 | gnu_stack_flags |= shdr.get_sh_flags(); | |
633 | omit[i] = true; | |
634 | } | |
635 | ||
a2fb1b05 ILT |
636 | bool discard = omit[i]; |
637 | if (!discard) | |
638 | { | |
639 | if (shdr.get_sh_type() == elfcpp::SHT_GROUP) | |
640 | { | |
6a74a719 ILT |
641 | if (!this->include_section_group(symtab, layout, i, name, shdr, |
642 | &omit)) | |
a2fb1b05 ILT |
643 | discard = true; |
644 | } | |
cba134d6 ILT |
645 | else if ((shdr.get_sh_flags() & elfcpp::SHF_GROUP) == 0 |
646 | && Layout::is_linkonce(name)) | |
a2fb1b05 ILT |
647 | { |
648 | if (!this->include_linkonce_section(layout, name, shdr)) | |
649 | discard = true; | |
650 | } | |
651 | } | |
652 | ||
653 | if (discard) | |
654 | { | |
655 | // Do not include this section in the link. | |
656 | map_sections[i].output_section = NULL; | |
657 | continue; | |
658 | } | |
659 | ||
6a74a719 ILT |
660 | // When doing a relocatable link we are going to copy input |
661 | // reloc sections into the output. We only want to copy the | |
662 | // ones associated with sections which are not being discarded. | |
663 | // However, we don't know that yet for all sections. So save | |
664 | // reloc sections and process them later. | |
7019cd25 | 665 | if (emit_relocs |
6a74a719 ILT |
666 | && (shdr.get_sh_type() == elfcpp::SHT_REL |
667 | || shdr.get_sh_type() == elfcpp::SHT_RELA)) | |
668 | { | |
669 | reloc_sections.push_back(i); | |
670 | continue; | |
671 | } | |
672 | ||
8851ecca | 673 | if (relocatable && shdr.get_sh_type() == elfcpp::SHT_GROUP) |
6a74a719 ILT |
674 | continue; |
675 | ||
730cdc88 ILT |
676 | // The .eh_frame section is special. It holds exception frame |
677 | // information that we need to read in order to generate the | |
678 | // exception frame header. We process these after all the other | |
679 | // sections so that the exception frame reader can reliably | |
680 | // determine which sections are being discarded, and discard the | |
681 | // corresponding information. | |
8851ecca | 682 | if (!relocatable |
730cdc88 ILT |
683 | && strcmp(name, ".eh_frame") == 0 |
684 | && this->check_eh_frame_flags(&shdr)) | |
685 | { | |
686 | eh_frame_sections.push_back(i); | |
687 | continue; | |
688 | } | |
689 | ||
a2fb1b05 | 690 | off_t offset; |
730cdc88 ILT |
691 | Output_section* os = layout->layout(this, i, name, shdr, |
692 | reloc_shndx[i], reloc_type[i], | |
693 | &offset); | |
a2fb1b05 ILT |
694 | |
695 | map_sections[i].output_section = os; | |
696 | map_sections[i].offset = offset; | |
730cdc88 ILT |
697 | |
698 | // If this section requires special handling, and if there are | |
699 | // relocs that apply to it, then we must do the special handling | |
700 | // before we apply the relocs. | |
701 | if (offset == -1 && reloc_shndx[i] != 0) | |
702 | this->set_relocs_must_follow_section_writes(); | |
12e14209 ILT |
703 | } |
704 | ||
35cdfc9a ILT |
705 | layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags); |
706 | ||
6a74a719 ILT |
707 | // When doing a relocatable link handle the reloc sections at the |
708 | // end. | |
7019cd25 | 709 | if (emit_relocs) |
6a74a719 ILT |
710 | this->size_relocatable_relocs(); |
711 | for (std::vector<unsigned int>::const_iterator p = reloc_sections.begin(); | |
712 | p != reloc_sections.end(); | |
713 | ++p) | |
714 | { | |
715 | unsigned int i = *p; | |
716 | const unsigned char* pshdr; | |
717 | pshdr = sd->section_headers->data() + i * This::shdr_size; | |
718 | typename This::Shdr shdr(pshdr); | |
719 | ||
720 | unsigned int data_shndx = shdr.get_sh_info(); | |
721 | if (data_shndx >= shnum) | |
722 | { | |
723 | // We already warned about this above. | |
724 | continue; | |
725 | } | |
726 | ||
727 | Output_section* data_section = map_sections[data_shndx].output_section; | |
728 | if (data_section == NULL) | |
729 | { | |
730 | map_sections[i].output_section = NULL; | |
731 | continue; | |
732 | } | |
733 | ||
734 | Relocatable_relocs* rr = new Relocatable_relocs(); | |
735 | this->set_relocatable_relocs(i, rr); | |
736 | ||
737 | Output_section* os = layout->layout_reloc(this, i, shdr, data_section, | |
738 | rr); | |
739 | map_sections[i].output_section = os; | |
740 | map_sections[i].offset = -1; | |
741 | } | |
742 | ||
730cdc88 ILT |
743 | // Handle the .eh_frame sections at the end. |
744 | for (std::vector<unsigned int>::const_iterator p = eh_frame_sections.begin(); | |
745 | p != eh_frame_sections.end(); | |
746 | ++p) | |
747 | { | |
748 | gold_assert(this->has_eh_frame_); | |
749 | gold_assert(sd->external_symbols_offset != 0); | |
750 | ||
751 | unsigned int i = *p; | |
752 | const unsigned char *pshdr; | |
753 | pshdr = sd->section_headers->data() + i * This::shdr_size; | |
754 | typename This::Shdr shdr(pshdr); | |
755 | ||
756 | off_t offset; | |
757 | Output_section* os = layout->layout_eh_frame(this, | |
758 | sd->symbols->data(), | |
759 | sd->symbols_size, | |
760 | sd->symbol_names->data(), | |
761 | sd->symbol_names_size, | |
762 | i, shdr, | |
763 | reloc_shndx[i], | |
764 | reloc_type[i], | |
765 | &offset); | |
766 | map_sections[i].output_section = os; | |
767 | map_sections[i].offset = offset; | |
768 | ||
769 | // If this section requires special handling, and if there are | |
770 | // relocs that apply to it, then we must do the special handling | |
771 | // before we apply the relocs. | |
772 | if (offset == -1 && reloc_shndx[i] != 0) | |
773 | this->set_relocs_must_follow_section_writes(); | |
774 | } | |
775 | ||
12e14209 ILT |
776 | delete sd->section_headers; |
777 | sd->section_headers = NULL; | |
778 | delete sd->section_names; | |
779 | sd->section_names = NULL; | |
780 | } | |
781 | ||
782 | // Add the symbols to the symbol table. | |
783 | ||
784 | template<int size, bool big_endian> | |
785 | void | |
f6ce93d6 | 786 | Sized_relobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, |
12e14209 ILT |
787 | Read_symbols_data* sd) |
788 | { | |
789 | if (sd->symbols == NULL) | |
790 | { | |
a3ad94ed | 791 | gold_assert(sd->symbol_names == NULL); |
12e14209 ILT |
792 | return; |
793 | } | |
a2fb1b05 | 794 | |
12e14209 | 795 | const int sym_size = This::sym_size; |
730cdc88 ILT |
796 | size_t symcount = ((sd->symbols_size - sd->external_symbols_offset) |
797 | / sym_size); | |
8383303e | 798 | if (symcount * sym_size != sd->symbols_size - sd->external_symbols_offset) |
12e14209 | 799 | { |
75f2446e ILT |
800 | this->error(_("size of symbols is not multiple of symbol size")); |
801 | return; | |
a2fb1b05 | 802 | } |
12e14209 | 803 | |
730cdc88 | 804 | this->symbols_.resize(symcount); |
12e14209 | 805 | |
12e14209 ILT |
806 | const char* sym_names = |
807 | reinterpret_cast<const char*>(sd->symbol_names->data()); | |
730cdc88 ILT |
808 | symtab->add_from_relobj(this, |
809 | sd->symbols->data() + sd->external_symbols_offset, | |
810 | symcount, sym_names, sd->symbol_names_size, | |
811 | &this->symbols_); | |
12e14209 ILT |
812 | |
813 | delete sd->symbols; | |
814 | sd->symbols = NULL; | |
815 | delete sd->symbol_names; | |
816 | sd->symbol_names = NULL; | |
bae7f79e ILT |
817 | } |
818 | ||
cb295612 ILT |
819 | // First pass over the local symbols. Here we add their names to |
820 | // *POOL and *DYNPOOL, and we store the symbol value in | |
821 | // THIS->LOCAL_VALUES_. This function is always called from a | |
822 | // singleton thread. This is followed by a call to | |
823 | // finalize_local_symbols. | |
75f65a3e ILT |
824 | |
825 | template<int size, bool big_endian> | |
7bf1f802 ILT |
826 | void |
827 | Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool, | |
828 | Stringpool* dynpool) | |
75f65a3e | 829 | { |
a3ad94ed | 830 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 831 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
832 | { |
833 | // This object has no symbols. Weird but legal. | |
7bf1f802 | 834 | return; |
61ba1cf9 ILT |
835 | } |
836 | ||
75f65a3e | 837 | // Read the symbol table section header. |
645f8123 ILT |
838 | const unsigned int symtab_shndx = this->symtab_shndx_; |
839 | typename This::Shdr symtabshdr(this, | |
840 | this->elf_file_.section_header(symtab_shndx)); | |
a3ad94ed | 841 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
75f65a3e ILT |
842 | |
843 | // Read the local symbols. | |
75f65a3e | 844 | const int sym_size = This::sym_size; |
92e059d8 | 845 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 846 | gold_assert(loccount == symtabshdr.get_sh_info()); |
75f65a3e ILT |
847 | off_t locsize = loccount * sym_size; |
848 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), | |
9eb9fa57 | 849 | locsize, true); |
75f65a3e | 850 | |
75f65a3e | 851 | // Read the symbol names. |
645f8123 | 852 | const unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
8383303e | 853 | section_size_type strtab_size; |
645f8123 | 854 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, |
9eb9fa57 ILT |
855 | &strtab_size, |
856 | true); | |
75f65a3e ILT |
857 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
858 | ||
859 | // Loop over the local symbols. | |
860 | ||
c06b7b0b | 861 | const std::vector<Map_to_output>& mo(this->map_to_output()); |
75f65a3e | 862 | unsigned int shnum = this->shnum(); |
61ba1cf9 | 863 | unsigned int count = 0; |
7bf1f802 | 864 | unsigned int dyncount = 0; |
75f65a3e ILT |
865 | // Skip the first, dummy, symbol. |
866 | psyms += sym_size; | |
61ba1cf9 | 867 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
75f65a3e ILT |
868 | { |
869 | elfcpp::Sym<size, big_endian> sym(psyms); | |
870 | ||
b8e6aad9 ILT |
871 | Symbol_value<size>& lv(this->local_values_[i]); |
872 | ||
75f65a3e | 873 | unsigned int shndx = sym.get_st_shndx(); |
b8e6aad9 | 874 | lv.set_input_shndx(shndx); |
75f65a3e | 875 | |
063f12a8 ILT |
876 | if (sym.get_st_type() == elfcpp::STT_SECTION) |
877 | lv.set_is_section_symbol(); | |
7bf1f802 ILT |
878 | else if (sym.get_st_type() == elfcpp::STT_TLS) |
879 | lv.set_is_tls_symbol(); | |
880 | ||
881 | // Save the input symbol value for use in do_finalize_local_symbols(). | |
882 | lv.set_input_value(sym.get_st_value()); | |
883 | ||
884 | // Decide whether this symbol should go into the output file. | |
063f12a8 | 885 | |
7bf1f802 ILT |
886 | if (shndx < shnum && mo[shndx].output_section == NULL) |
887 | { | |
888 | lv.set_no_output_symtab_entry(); | |
dceae3c1 | 889 | gold_assert(!lv.needs_output_dynsym_entry()); |
7bf1f802 ILT |
890 | continue; |
891 | } | |
892 | ||
893 | if (sym.get_st_type() == elfcpp::STT_SECTION) | |
894 | { | |
895 | lv.set_no_output_symtab_entry(); | |
dceae3c1 | 896 | gold_assert(!lv.needs_output_dynsym_entry()); |
7bf1f802 ILT |
897 | continue; |
898 | } | |
899 | ||
900 | if (sym.get_st_name() >= strtab_size) | |
901 | { | |
902 | this->error(_("local symbol %u section name out of range: %u >= %u"), | |
903 | i, sym.get_st_name(), | |
904 | static_cast<unsigned int>(strtab_size)); | |
905 | lv.set_no_output_symtab_entry(); | |
906 | continue; | |
907 | } | |
908 | ||
909 | // Add the symbol to the symbol table string pool. | |
910 | const char* name = pnames + sym.get_st_name(); | |
911 | pool->add(name, true, NULL); | |
912 | ++count; | |
913 | ||
914 | // If needed, add the symbol to the dynamic symbol table string pool. | |
915 | if (lv.needs_output_dynsym_entry()) | |
916 | { | |
917 | dynpool->add(name, true, NULL); | |
918 | ++dyncount; | |
919 | } | |
920 | } | |
921 | ||
922 | this->output_local_symbol_count_ = count; | |
923 | this->output_local_dynsym_count_ = dyncount; | |
924 | } | |
925 | ||
cb295612 | 926 | // Finalize the local symbols. Here we set the final value in |
7bf1f802 | 927 | // THIS->LOCAL_VALUES_ and set their output symbol table indexes. |
17a1d0a9 | 928 | // This function is always called from a singleton thread. The actual |
7bf1f802 ILT |
929 | // output of the local symbols will occur in a separate task. |
930 | ||
931 | template<int size, bool big_endian> | |
932 | unsigned int | |
933 | Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index, | |
934 | off_t off) | |
935 | { | |
936 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); | |
937 | ||
938 | const unsigned int loccount = this->local_symbol_count_; | |
939 | this->local_symbol_offset_ = off; | |
940 | ||
941 | const std::vector<Map_to_output>& mo(this->map_to_output()); | |
942 | unsigned int shnum = this->shnum(); | |
943 | ||
944 | for (unsigned int i = 1; i < loccount; ++i) | |
945 | { | |
946 | Symbol_value<size>& lv(this->local_values_[i]); | |
947 | ||
948 | unsigned int shndx = lv.input_shndx(); | |
949 | ||
950 | // Set the output symbol value. | |
951 | ||
75f65a3e ILT |
952 | if (shndx >= elfcpp::SHN_LORESERVE) |
953 | { | |
0dfbdef4 | 954 | if (shndx == elfcpp::SHN_ABS || shndx == elfcpp::SHN_COMMON) |
7bf1f802 | 955 | lv.set_output_value(lv.input_value()); |
61ba1cf9 | 956 | else |
75f65a3e | 957 | { |
61ba1cf9 | 958 | // FIXME: Handle SHN_XINDEX. |
75f2446e ILT |
959 | this->error(_("unknown section index %u for local symbol %u"), |
960 | shndx, i); | |
961 | lv.set_output_value(0); | |
75f65a3e | 962 | } |
75f65a3e ILT |
963 | } |
964 | else | |
965 | { | |
966 | if (shndx >= shnum) | |
967 | { | |
75f2446e ILT |
968 | this->error(_("local symbol %u section index %u out of range"), |
969 | i, shndx); | |
970 | shndx = 0; | |
75f65a3e ILT |
971 | } |
972 | ||
b8e6aad9 ILT |
973 | Output_section* os = mo[shndx].output_section; |
974 | ||
975 | if (os == NULL) | |
61ba1cf9 | 976 | { |
b8e6aad9 | 977 | lv.set_output_value(0); |
61ba1cf9 ILT |
978 | continue; |
979 | } | |
7bf1f802 ILT |
980 | else if (mo[shndx].offset == -1) |
981 | { | |
a9a60db6 ILT |
982 | // This is a SHF_MERGE section or one which otherwise |
983 | // requires special handling. We get the output address | |
984 | // of the start of the merged section. If this is not a | |
985 | // section symbol, we can then determine the final | |
986 | // value. If it is a section symbol, we can not, as in | |
987 | // that case we have to consider the addend to determine | |
988 | // the value to use in a relocation. | |
a9a60db6 | 989 | if (!lv.is_section_symbol()) |
8d32f935 ILT |
990 | lv.set_output_value(os->output_address(this, shndx, |
991 | lv.input_value())); | |
a9a60db6 ILT |
992 | else |
993 | { | |
8d32f935 ILT |
994 | section_offset_type start = |
995 | os->starting_output_address(this, shndx); | |
a9a60db6 ILT |
996 | Merged_symbol_value<size>* msv = |
997 | new Merged_symbol_value<size>(lv.input_value(), start); | |
998 | lv.set_merged_symbol_value(msv); | |
999 | } | |
7bf1f802 ILT |
1000 | } |
1001 | else if (lv.is_tls_symbol()) | |
a9a60db6 | 1002 | lv.set_output_value(os->tls_offset() |
7bf1f802 ILT |
1003 | + mo[shndx].offset |
1004 | + lv.input_value()); | |
b8e6aad9 | 1005 | else |
a9a60db6 | 1006 | lv.set_output_value(os->address() |
b8e6aad9 | 1007 | + mo[shndx].offset |
7bf1f802 | 1008 | + lv.input_value()); |
75f65a3e ILT |
1009 | } |
1010 | ||
7bf1f802 ILT |
1011 | if (lv.needs_output_symtab_entry()) |
1012 | { | |
1013 | lv.set_output_symtab_index(index); | |
1014 | ++index; | |
1015 | } | |
1016 | } | |
1017 | return index; | |
1018 | } | |
645f8123 | 1019 | |
7bf1f802 | 1020 | // Set the output dynamic symbol table indexes for the local variables. |
c06b7b0b | 1021 | |
7bf1f802 ILT |
1022 | template<int size, bool big_endian> |
1023 | unsigned int | |
1024 | Sized_relobj<size, big_endian>::do_set_local_dynsym_indexes(unsigned int index) | |
1025 | { | |
1026 | const unsigned int loccount = this->local_symbol_count_; | |
1027 | for (unsigned int i = 1; i < loccount; ++i) | |
1028 | { | |
1029 | Symbol_value<size>& lv(this->local_values_[i]); | |
1030 | if (lv.needs_output_dynsym_entry()) | |
1031 | { | |
1032 | lv.set_output_dynsym_index(index); | |
1033 | ++index; | |
1034 | } | |
75f65a3e | 1035 | } |
7bf1f802 ILT |
1036 | return index; |
1037 | } | |
75f65a3e | 1038 | |
7bf1f802 ILT |
1039 | // Set the offset where local dynamic symbol information will be stored. |
1040 | // Returns the count of local symbols contributed to the symbol table by | |
1041 | // this object. | |
61ba1cf9 | 1042 | |
7bf1f802 ILT |
1043 | template<int size, bool big_endian> |
1044 | unsigned int | |
1045 | Sized_relobj<size, big_endian>::do_set_local_dynsym_offset(off_t off) | |
1046 | { | |
1047 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); | |
1048 | this->local_dynsym_offset_ = off; | |
1049 | return this->output_local_dynsym_count_; | |
75f65a3e ILT |
1050 | } |
1051 | ||
e727fa71 ILT |
1052 | // Return the value of the local symbol symndx. |
1053 | template<int size, bool big_endian> | |
1054 | typename elfcpp::Elf_types<size>::Elf_Addr | |
1055 | Sized_relobj<size, big_endian>::local_symbol_value(unsigned int symndx) const | |
1056 | { | |
1057 | gold_assert(symndx < this->local_symbol_count_); | |
1058 | gold_assert(symndx < this->local_values_.size()); | |
1059 | const Symbol_value<size>& lv(this->local_values_[symndx]); | |
1060 | return lv.value(this, 0); | |
1061 | } | |
1062 | ||
61ba1cf9 ILT |
1063 | // Write out the local symbols. |
1064 | ||
1065 | template<int size, bool big_endian> | |
1066 | void | |
17a1d0a9 ILT |
1067 | Sized_relobj<size, big_endian>::write_local_symbols( |
1068 | Output_file* of, | |
1069 | const Stringpool* sympool, | |
1070 | const Stringpool* dynpool) | |
61ba1cf9 | 1071 | { |
8851ecca ILT |
1072 | if (parameters->options().strip_all() |
1073 | && this->output_local_dynsym_count_ == 0) | |
9e2dcb77 ILT |
1074 | return; |
1075 | ||
a3ad94ed | 1076 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 1077 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
1078 | { |
1079 | // This object has no symbols. Weird but legal. | |
1080 | return; | |
1081 | } | |
1082 | ||
1083 | // Read the symbol table section header. | |
645f8123 ILT |
1084 | const unsigned int symtab_shndx = this->symtab_shndx_; |
1085 | typename This::Shdr symtabshdr(this, | |
1086 | this->elf_file_.section_header(symtab_shndx)); | |
a3ad94ed | 1087 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
92e059d8 | 1088 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 1089 | gold_assert(loccount == symtabshdr.get_sh_info()); |
61ba1cf9 ILT |
1090 | |
1091 | // Read the local symbols. | |
1092 | const int sym_size = This::sym_size; | |
92e059d8 | 1093 | off_t locsize = loccount * sym_size; |
61ba1cf9 | 1094 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), |
9eb9fa57 | 1095 | locsize, false); |
61ba1cf9 | 1096 | |
61ba1cf9 | 1097 | // Read the symbol names. |
645f8123 | 1098 | const unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
8383303e | 1099 | section_size_type strtab_size; |
645f8123 | 1100 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, |
9eb9fa57 | 1101 | &strtab_size, |
cb295612 | 1102 | false); |
61ba1cf9 ILT |
1103 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
1104 | ||
7bf1f802 ILT |
1105 | // Get views into the output file for the portions of the symbol table |
1106 | // and the dynamic symbol table that we will be writing. | |
61ba1cf9 | 1107 | off_t output_size = this->output_local_symbol_count_ * sym_size; |
f2619d6c | 1108 | unsigned char* oview = NULL; |
7bf1f802 ILT |
1109 | if (output_size > 0) |
1110 | oview = of->get_output_view(this->local_symbol_offset_, output_size); | |
1111 | ||
1112 | off_t dyn_output_size = this->output_local_dynsym_count_ * sym_size; | |
1113 | unsigned char* dyn_oview = NULL; | |
1114 | if (dyn_output_size > 0) | |
1115 | dyn_oview = of->get_output_view(this->local_dynsym_offset_, | |
1116 | dyn_output_size); | |
61ba1cf9 | 1117 | |
c06b7b0b ILT |
1118 | const std::vector<Map_to_output>& mo(this->map_to_output()); |
1119 | ||
a3ad94ed | 1120 | gold_assert(this->local_values_.size() == loccount); |
61ba1cf9 | 1121 | |
61ba1cf9 | 1122 | unsigned char* ov = oview; |
7bf1f802 | 1123 | unsigned char* dyn_ov = dyn_oview; |
c06b7b0b | 1124 | psyms += sym_size; |
92e059d8 | 1125 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
61ba1cf9 ILT |
1126 | { |
1127 | elfcpp::Sym<size, big_endian> isym(psyms); | |
f6ce93d6 | 1128 | |
61ba1cf9 ILT |
1129 | unsigned int st_shndx = isym.get_st_shndx(); |
1130 | if (st_shndx < elfcpp::SHN_LORESERVE) | |
1131 | { | |
a3ad94ed | 1132 | gold_assert(st_shndx < mo.size()); |
61ba1cf9 ILT |
1133 | if (mo[st_shndx].output_section == NULL) |
1134 | continue; | |
ead1e424 | 1135 | st_shndx = mo[st_shndx].output_section->out_shndx(); |
61ba1cf9 ILT |
1136 | } |
1137 | ||
7bf1f802 | 1138 | // Write the symbol to the output symbol table. |
8851ecca | 1139 | if (!parameters->options().strip_all() |
7bf1f802 ILT |
1140 | && this->local_values_[i].needs_output_symtab_entry()) |
1141 | { | |
1142 | elfcpp::Sym_write<size, big_endian> osym(ov); | |
1143 | ||
1144 | gold_assert(isym.get_st_name() < strtab_size); | |
1145 | const char* name = pnames + isym.get_st_name(); | |
1146 | osym.put_st_name(sympool->get_offset(name)); | |
1147 | osym.put_st_value(this->local_values_[i].value(this, 0)); | |
1148 | osym.put_st_size(isym.get_st_size()); | |
1149 | osym.put_st_info(isym.get_st_info()); | |
1150 | osym.put_st_other(isym.get_st_other()); | |
1151 | osym.put_st_shndx(st_shndx); | |
1152 | ||
1153 | ov += sym_size; | |
1154 | } | |
1155 | ||
1156 | // Write the symbol to the output dynamic symbol table. | |
1157 | if (this->local_values_[i].needs_output_dynsym_entry()) | |
1158 | { | |
1159 | gold_assert(dyn_ov < dyn_oview + dyn_output_size); | |
1160 | elfcpp::Sym_write<size, big_endian> osym(dyn_ov); | |
1161 | ||
1162 | gold_assert(isym.get_st_name() < strtab_size); | |
1163 | const char* name = pnames + isym.get_st_name(); | |
1164 | osym.put_st_name(dynpool->get_offset(name)); | |
1165 | osym.put_st_value(this->local_values_[i].value(this, 0)); | |
1166 | osym.put_st_size(isym.get_st_size()); | |
1167 | osym.put_st_info(isym.get_st_info()); | |
1168 | osym.put_st_other(isym.get_st_other()); | |
1169 | osym.put_st_shndx(st_shndx); | |
1170 | ||
1171 | dyn_ov += sym_size; | |
1172 | } | |
1173 | } | |
f6ce93d6 | 1174 | |
61ba1cf9 | 1175 | |
7bf1f802 ILT |
1176 | if (output_size > 0) |
1177 | { | |
1178 | gold_assert(ov - oview == output_size); | |
1179 | of->write_output_view(this->local_symbol_offset_, output_size, oview); | |
61ba1cf9 ILT |
1180 | } |
1181 | ||
7bf1f802 ILT |
1182 | if (dyn_output_size > 0) |
1183 | { | |
1184 | gold_assert(dyn_ov - dyn_oview == dyn_output_size); | |
1185 | of->write_output_view(this->local_dynsym_offset_, dyn_output_size, | |
1186 | dyn_oview); | |
1187 | } | |
61ba1cf9 ILT |
1188 | } |
1189 | ||
f7e2ee48 ILT |
1190 | // Set *INFO to symbolic information about the offset OFFSET in the |
1191 | // section SHNDX. Return true if we found something, false if we | |
1192 | // found nothing. | |
1193 | ||
1194 | template<int size, bool big_endian> | |
1195 | bool | |
1196 | Sized_relobj<size, big_endian>::get_symbol_location_info( | |
1197 | unsigned int shndx, | |
1198 | off_t offset, | |
1199 | Symbol_location_info* info) | |
1200 | { | |
1201 | if (this->symtab_shndx_ == 0) | |
1202 | return false; | |
1203 | ||
8383303e | 1204 | section_size_type symbols_size; |
f7e2ee48 ILT |
1205 | const unsigned char* symbols = this->section_contents(this->symtab_shndx_, |
1206 | &symbols_size, | |
1207 | false); | |
1208 | ||
1209 | unsigned int symbol_names_shndx = this->section_link(this->symtab_shndx_); | |
8383303e | 1210 | section_size_type names_size; |
f7e2ee48 ILT |
1211 | const unsigned char* symbol_names_u = |
1212 | this->section_contents(symbol_names_shndx, &names_size, false); | |
1213 | const char* symbol_names = reinterpret_cast<const char*>(symbol_names_u); | |
1214 | ||
1215 | const int sym_size = This::sym_size; | |
1216 | const size_t count = symbols_size / sym_size; | |
1217 | ||
1218 | const unsigned char* p = symbols; | |
1219 | for (size_t i = 0; i < count; ++i, p += sym_size) | |
1220 | { | |
1221 | elfcpp::Sym<size, big_endian> sym(p); | |
1222 | ||
1223 | if (sym.get_st_type() == elfcpp::STT_FILE) | |
1224 | { | |
1225 | if (sym.get_st_name() >= names_size) | |
1226 | info->source_file = "(invalid)"; | |
1227 | else | |
1228 | info->source_file = symbol_names + sym.get_st_name(); | |
1229 | } | |
1230 | else if (sym.get_st_shndx() == shndx | |
1231 | && static_cast<off_t>(sym.get_st_value()) <= offset | |
1232 | && (static_cast<off_t>(sym.get_st_value() + sym.get_st_size()) | |
5c2c6c95 | 1233 | > offset)) |
f7e2ee48 ILT |
1234 | { |
1235 | if (sym.get_st_name() > names_size) | |
1236 | info->enclosing_symbol_name = "(invalid)"; | |
1237 | else | |
a2b1aa12 ILT |
1238 | { |
1239 | info->enclosing_symbol_name = symbol_names + sym.get_st_name(); | |
8851ecca | 1240 | if (parameters->options().demangle()) |
a2b1aa12 ILT |
1241 | { |
1242 | char* demangled_name = cplus_demangle( | |
1243 | info->enclosing_symbol_name.c_str(), | |
1244 | DMGL_ANSI | DMGL_PARAMS); | |
1245 | if (demangled_name != NULL) | |
1246 | { | |
1247 | info->enclosing_symbol_name.assign(demangled_name); | |
1248 | free(demangled_name); | |
1249 | } | |
1250 | } | |
1251 | } | |
f7e2ee48 ILT |
1252 | return true; |
1253 | } | |
1254 | } | |
1255 | ||
1256 | return false; | |
1257 | } | |
1258 | ||
54dc6425 ILT |
1259 | // Input_objects methods. |
1260 | ||
008db82e ILT |
1261 | // Add a regular relocatable object to the list. Return false if this |
1262 | // object should be ignored. | |
f6ce93d6 | 1263 | |
008db82e | 1264 | bool |
54dc6425 ILT |
1265 | Input_objects::add_object(Object* obj) |
1266 | { | |
fbfba508 | 1267 | // Set the global target from the first object file we recognize. |
019cdb1a | 1268 | Target* target = obj->target(); |
8851ecca | 1269 | if (!parameters->target_valid()) |
fbfba508 | 1270 | set_parameters_target(target); |
8851ecca | 1271 | else if (target != ¶meters->target()) |
019cdb1a | 1272 | { |
fbfba508 | 1273 | obj->error(_("incompatible target")); |
019cdb1a ILT |
1274 | return false; |
1275 | } | |
1276 | ||
008db82e | 1277 | if (!obj->is_dynamic()) |
f6ce93d6 | 1278 | this->relobj_list_.push_back(static_cast<Relobj*>(obj)); |
008db82e ILT |
1279 | else |
1280 | { | |
1281 | // See if this is a duplicate SONAME. | |
1282 | Dynobj* dynobj = static_cast<Dynobj*>(obj); | |
9a2d6984 | 1283 | const char* soname = dynobj->soname(); |
008db82e ILT |
1284 | |
1285 | std::pair<Unordered_set<std::string>::iterator, bool> ins = | |
9a2d6984 | 1286 | this->sonames_.insert(soname); |
008db82e ILT |
1287 | if (!ins.second) |
1288 | { | |
1289 | // We have already seen a dynamic object with this soname. | |
1290 | return false; | |
1291 | } | |
1292 | ||
1293 | this->dynobj_list_.push_back(dynobj); | |
9a2d6984 ILT |
1294 | |
1295 | // If this is -lc, remember the directory in which we found it. | |
1296 | // We use this when issuing warnings about undefined symbols: as | |
1297 | // a heuristic, we don't warn about system libraries found in | |
1298 | // the same directory as -lc. | |
1299 | if (strncmp(soname, "libc.so", 7) == 0) | |
1300 | { | |
1301 | const char* object_name = dynobj->name().c_str(); | |
1302 | const char* base = lbasename(object_name); | |
1303 | if (base != object_name) | |
1304 | this->system_library_directory_.assign(object_name, | |
1305 | base - 1 - object_name); | |
1306 | } | |
008db82e | 1307 | } |
75f65a3e | 1308 | |
008db82e | 1309 | return true; |
54dc6425 ILT |
1310 | } |
1311 | ||
9a2d6984 ILT |
1312 | // Return whether an object was found in the system library directory. |
1313 | ||
1314 | bool | |
1315 | Input_objects::found_in_system_library_directory(const Object* object) const | |
1316 | { | |
1317 | return (!this->system_library_directory_.empty() | |
1318 | && object->name().compare(0, | |
1319 | this->system_library_directory_.size(), | |
1320 | this->system_library_directory_) == 0); | |
1321 | } | |
1322 | ||
e2827e5f ILT |
1323 | // For each dynamic object, record whether we've seen all of its |
1324 | // explicit dependencies. | |
1325 | ||
1326 | void | |
1327 | Input_objects::check_dynamic_dependencies() const | |
1328 | { | |
1329 | for (Dynobj_list::const_iterator p = this->dynobj_list_.begin(); | |
1330 | p != this->dynobj_list_.end(); | |
1331 | ++p) | |
1332 | { | |
1333 | const Dynobj::Needed& needed((*p)->needed()); | |
1334 | bool found_all = true; | |
1335 | for (Dynobj::Needed::const_iterator pneeded = needed.begin(); | |
1336 | pneeded != needed.end(); | |
1337 | ++pneeded) | |
1338 | { | |
1339 | if (this->sonames_.find(*pneeded) == this->sonames_.end()) | |
1340 | { | |
1341 | found_all = false; | |
1342 | break; | |
1343 | } | |
1344 | } | |
1345 | (*p)->set_has_unknown_needed_entries(!found_all); | |
1346 | } | |
1347 | } | |
1348 | ||
92e059d8 ILT |
1349 | // Relocate_info methods. |
1350 | ||
1351 | // Return a string describing the location of a relocation. This is | |
1352 | // only used in error messages. | |
1353 | ||
1354 | template<int size, bool big_endian> | |
1355 | std::string | |
f7e2ee48 | 1356 | Relocate_info<size, big_endian>::location(size_t, off_t offset) const |
92e059d8 | 1357 | { |
5c2c6c95 ILT |
1358 | // See if we can get line-number information from debugging sections. |
1359 | std::string filename; | |
1360 | std::string file_and_lineno; // Better than filename-only, if available. | |
4c50553d | 1361 | |
a55ce7fe | 1362 | Sized_dwarf_line_info<size, big_endian> line_info(this->object); |
24badc65 ILT |
1363 | // This will be "" if we failed to parse the debug info for any reason. |
1364 | file_and_lineno = line_info.addr2line(this->data_shndx, offset); | |
4c50553d | 1365 | |
92e059d8 | 1366 | std::string ret(this->object->name()); |
f7e2ee48 ILT |
1367 | ret += ':'; |
1368 | Symbol_location_info info; | |
1369 | if (this->object->get_symbol_location_info(this->data_shndx, offset, &info)) | |
1370 | { | |
1371 | ret += " in function "; | |
1372 | ret += info.enclosing_symbol_name; | |
1373 | ret += ":"; | |
5c2c6c95 ILT |
1374 | filename = info.source_file; |
1375 | } | |
1376 | ||
1377 | if (!file_and_lineno.empty()) | |
1378 | ret += file_and_lineno; | |
1379 | else | |
1380 | { | |
1381 | if (!filename.empty()) | |
1382 | ret += filename; | |
1383 | ret += "("; | |
1384 | ret += this->object->section_name(this->data_shndx); | |
1385 | char buf[100]; | |
1386 | // Offsets into sections have to be positive. | |
1387 | snprintf(buf, sizeof(buf), "+0x%lx", static_cast<long>(offset)); | |
1388 | ret += buf; | |
1389 | ret += ")"; | |
f7e2ee48 | 1390 | } |
92e059d8 ILT |
1391 | return ret; |
1392 | } | |
1393 | ||
bae7f79e ILT |
1394 | } // End namespace gold. |
1395 | ||
1396 | namespace | |
1397 | { | |
1398 | ||
1399 | using namespace gold; | |
1400 | ||
1401 | // Read an ELF file with the header and return the appropriate | |
1402 | // instance of Object. | |
1403 | ||
1404 | template<int size, bool big_endian> | |
1405 | Object* | |
1406 | make_elf_sized_object(const std::string& name, Input_file* input_file, | |
1407 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
1408 | { | |
1409 | int et = ehdr.get_e_type(); | |
bae7f79e ILT |
1410 | if (et == elfcpp::ET_REL) |
1411 | { | |
f6ce93d6 ILT |
1412 | Sized_relobj<size, big_endian>* obj = |
1413 | new Sized_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
bae7f79e ILT |
1414 | obj->setup(ehdr); |
1415 | return obj; | |
1416 | } | |
dbe717ef ILT |
1417 | else if (et == elfcpp::ET_DYN) |
1418 | { | |
1419 | Sized_dynobj<size, big_endian>* obj = | |
1420 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
1421 | obj->setup(ehdr); | |
1422 | return obj; | |
1423 | } | |
bae7f79e ILT |
1424 | else |
1425 | { | |
75f2446e ILT |
1426 | gold_error(_("%s: unsupported ELF file type %d"), |
1427 | name.c_str(), et); | |
1428 | return NULL; | |
bae7f79e ILT |
1429 | } |
1430 | } | |
1431 | ||
1432 | } // End anonymous namespace. | |
1433 | ||
1434 | namespace gold | |
1435 | { | |
1436 | ||
1437 | // Read an ELF file and return the appropriate instance of Object. | |
1438 | ||
1439 | Object* | |
1440 | make_elf_object(const std::string& name, Input_file* input_file, off_t offset, | |
8383303e | 1441 | const unsigned char* p, section_offset_type bytes) |
bae7f79e ILT |
1442 | { |
1443 | if (bytes < elfcpp::EI_NIDENT) | |
1444 | { | |
75f2446e ILT |
1445 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1446 | return NULL; | |
bae7f79e ILT |
1447 | } |
1448 | ||
1449 | int v = p[elfcpp::EI_VERSION]; | |
1450 | if (v != elfcpp::EV_CURRENT) | |
1451 | { | |
1452 | if (v == elfcpp::EV_NONE) | |
75f2446e | 1453 | gold_error(_("%s: invalid ELF version 0"), name.c_str()); |
bae7f79e | 1454 | else |
75f2446e ILT |
1455 | gold_error(_("%s: unsupported ELF version %d"), name.c_str(), v); |
1456 | return NULL; | |
bae7f79e ILT |
1457 | } |
1458 | ||
1459 | int c = p[elfcpp::EI_CLASS]; | |
1460 | if (c == elfcpp::ELFCLASSNONE) | |
1461 | { | |
75f2446e ILT |
1462 | gold_error(_("%s: invalid ELF class 0"), name.c_str()); |
1463 | return NULL; | |
bae7f79e ILT |
1464 | } |
1465 | else if (c != elfcpp::ELFCLASS32 | |
1466 | && c != elfcpp::ELFCLASS64) | |
1467 | { | |
75f2446e ILT |
1468 | gold_error(_("%s: unsupported ELF class %d"), name.c_str(), c); |
1469 | return NULL; | |
bae7f79e ILT |
1470 | } |
1471 | ||
1472 | int d = p[elfcpp::EI_DATA]; | |
1473 | if (d == elfcpp::ELFDATANONE) | |
1474 | { | |
75f2446e ILT |
1475 | gold_error(_("%s: invalid ELF data encoding"), name.c_str()); |
1476 | return NULL; | |
bae7f79e ILT |
1477 | } |
1478 | else if (d != elfcpp::ELFDATA2LSB | |
1479 | && d != elfcpp::ELFDATA2MSB) | |
1480 | { | |
75f2446e ILT |
1481 | gold_error(_("%s: unsupported ELF data encoding %d"), name.c_str(), d); |
1482 | return NULL; | |
bae7f79e ILT |
1483 | } |
1484 | ||
1485 | bool big_endian = d == elfcpp::ELFDATA2MSB; | |
1486 | ||
1487 | if (c == elfcpp::ELFCLASS32) | |
1488 | { | |
1489 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
1490 | { | |
75f2446e ILT |
1491 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1492 | return NULL; | |
bae7f79e ILT |
1493 | } |
1494 | if (big_endian) | |
1495 | { | |
193a53d9 | 1496 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e ILT |
1497 | elfcpp::Ehdr<32, true> ehdr(p); |
1498 | return make_elf_sized_object<32, true>(name, input_file, | |
1499 | offset, ehdr); | |
193a53d9 | 1500 | #else |
75f2446e ILT |
1501 | gold_error(_("%s: not configured to support " |
1502 | "32-bit big-endian object"), | |
1503 | name.c_str()); | |
1504 | return NULL; | |
193a53d9 | 1505 | #endif |
bae7f79e ILT |
1506 | } |
1507 | else | |
1508 | { | |
193a53d9 | 1509 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e ILT |
1510 | elfcpp::Ehdr<32, false> ehdr(p); |
1511 | return make_elf_sized_object<32, false>(name, input_file, | |
1512 | offset, ehdr); | |
193a53d9 | 1513 | #else |
75f2446e ILT |
1514 | gold_error(_("%s: not configured to support " |
1515 | "32-bit little-endian object"), | |
1516 | name.c_str()); | |
1517 | return NULL; | |
193a53d9 | 1518 | #endif |
bae7f79e ILT |
1519 | } |
1520 | } | |
1521 | else | |
1522 | { | |
1523 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
1524 | { | |
75f2446e ILT |
1525 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1526 | return NULL; | |
bae7f79e ILT |
1527 | } |
1528 | if (big_endian) | |
1529 | { | |
193a53d9 | 1530 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e ILT |
1531 | elfcpp::Ehdr<64, true> ehdr(p); |
1532 | return make_elf_sized_object<64, true>(name, input_file, | |
1533 | offset, ehdr); | |
193a53d9 | 1534 | #else |
75f2446e ILT |
1535 | gold_error(_("%s: not configured to support " |
1536 | "64-bit big-endian object"), | |
1537 | name.c_str()); | |
1538 | return NULL; | |
193a53d9 | 1539 | #endif |
bae7f79e ILT |
1540 | } |
1541 | else | |
1542 | { | |
193a53d9 | 1543 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e ILT |
1544 | elfcpp::Ehdr<64, false> ehdr(p); |
1545 | return make_elf_sized_object<64, false>(name, input_file, | |
1546 | offset, ehdr); | |
193a53d9 | 1547 | #else |
75f2446e ILT |
1548 | gold_error(_("%s: not configured to support " |
1549 | "64-bit little-endian object"), | |
1550 | name.c_str()); | |
1551 | return NULL; | |
193a53d9 | 1552 | #endif |
bae7f79e ILT |
1553 | } |
1554 | } | |
1555 | } | |
1556 | ||
1557 | // Instantiate the templates we need. We could use the configure | |
1558 | // script to restrict this to only the ones for implemented targets. | |
1559 | ||
193a53d9 | 1560 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e | 1561 | template |
f6ce93d6 | 1562 | class Sized_relobj<32, false>; |
193a53d9 | 1563 | #endif |
bae7f79e | 1564 | |
193a53d9 | 1565 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e | 1566 | template |
f6ce93d6 | 1567 | class Sized_relobj<32, true>; |
193a53d9 | 1568 | #endif |
bae7f79e | 1569 | |
193a53d9 | 1570 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e | 1571 | template |
f6ce93d6 | 1572 | class Sized_relobj<64, false>; |
193a53d9 | 1573 | #endif |
bae7f79e | 1574 | |
193a53d9 | 1575 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e | 1576 | template |
f6ce93d6 | 1577 | class Sized_relobj<64, true>; |
193a53d9 | 1578 | #endif |
bae7f79e | 1579 | |
193a53d9 | 1580 | #ifdef HAVE_TARGET_32_LITTLE |
92e059d8 ILT |
1581 | template |
1582 | struct Relocate_info<32, false>; | |
193a53d9 | 1583 | #endif |
92e059d8 | 1584 | |
193a53d9 | 1585 | #ifdef HAVE_TARGET_32_BIG |
92e059d8 ILT |
1586 | template |
1587 | struct Relocate_info<32, true>; | |
193a53d9 | 1588 | #endif |
92e059d8 | 1589 | |
193a53d9 | 1590 | #ifdef HAVE_TARGET_64_LITTLE |
92e059d8 ILT |
1591 | template |
1592 | struct Relocate_info<64, false>; | |
193a53d9 | 1593 | #endif |
92e059d8 | 1594 | |
193a53d9 | 1595 | #ifdef HAVE_TARGET_64_BIG |
92e059d8 ILT |
1596 | template |
1597 | struct Relocate_info<64, true>; | |
193a53d9 | 1598 | #endif |
92e059d8 | 1599 | |
bae7f79e | 1600 | } // End namespace gold. |