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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> |
bae7f79e | 28 | |
14bfc3f5 | 29 | #include "target-select.h" |
a2fb1b05 | 30 | #include "layout.h" |
61ba1cf9 | 31 | #include "output.h" |
f6ce93d6 ILT |
32 | #include "symtab.h" |
33 | #include "object.h" | |
34 | #include "dynobj.h" | |
bae7f79e ILT |
35 | |
36 | namespace gold | |
37 | { | |
38 | ||
645f8123 ILT |
39 | // Class Object. |
40 | ||
dbe717ef ILT |
41 | // Set the target based on fields in the ELF file header. |
42 | ||
43 | void | |
44 | Object::set_target(int machine, int size, bool big_endian, int osabi, | |
45 | int abiversion) | |
46 | { | |
47 | Target* target = select_target(machine, size, big_endian, osabi, abiversion); | |
48 | if (target == NULL) | |
75f2446e ILT |
49 | gold_fatal(_("%s: unsupported ELF machine number %d"), |
50 | this->name().c_str(), machine); | |
dbe717ef ILT |
51 | this->target_ = target; |
52 | } | |
53 | ||
75f2446e ILT |
54 | // Report an error for this object file. This is used by the |
55 | // elfcpp::Elf_file interface, and also called by the Object code | |
56 | // itself. | |
645f8123 ILT |
57 | |
58 | void | |
75f2446e | 59 | Object::error(const char* format, ...) const |
645f8123 ILT |
60 | { |
61 | va_list args; | |
645f8123 | 62 | va_start(args, format); |
75f2446e ILT |
63 | char* buf = NULL; |
64 | if (vasprintf(&buf, format, args) < 0) | |
65 | gold_nomem(); | |
645f8123 | 66 | va_end(args); |
75f2446e ILT |
67 | gold_error(_("%s: %s"), this->name().c_str(), buf); |
68 | free(buf); | |
645f8123 ILT |
69 | } |
70 | ||
71 | // Return a view of the contents of a section. | |
72 | ||
73 | const unsigned char* | |
9eb9fa57 | 74 | Object::section_contents(unsigned int shndx, off_t* plen, bool cache) |
645f8123 ILT |
75 | { |
76 | Location loc(this->do_section_contents(shndx)); | |
77 | *plen = loc.data_size; | |
9eb9fa57 | 78 | return this->get_view(loc.file_offset, loc.data_size, cache); |
645f8123 ILT |
79 | } |
80 | ||
dbe717ef ILT |
81 | // Read the section data into SD. This is code common to Sized_relobj |
82 | // and Sized_dynobj, so we put it into Object. | |
83 | ||
84 | template<int size, bool big_endian> | |
85 | void | |
86 | Object::read_section_data(elfcpp::Elf_file<size, big_endian, Object>* elf_file, | |
87 | Read_symbols_data* sd) | |
88 | { | |
89 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
90 | ||
91 | // Read the section headers. | |
92 | const off_t shoff = elf_file->shoff(); | |
93 | const unsigned int shnum = this->shnum(); | |
9eb9fa57 | 94 | sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size, true); |
dbe717ef ILT |
95 | |
96 | // Read the section names. | |
97 | const unsigned char* pshdrs = sd->section_headers->data(); | |
98 | const unsigned char* pshdrnames = pshdrs + elf_file->shstrndx() * shdr_size; | |
99 | typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames); | |
100 | ||
101 | if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB) | |
75f2446e ILT |
102 | this->error(_("section name section has wrong type: %u"), |
103 | static_cast<unsigned int>(shdrnames.get_sh_type())); | |
dbe717ef ILT |
104 | |
105 | sd->section_names_size = shdrnames.get_sh_size(); | |
106 | sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(), | |
9eb9fa57 | 107 | sd->section_names_size, false); |
dbe717ef ILT |
108 | } |
109 | ||
110 | // If NAME is the name of a special .gnu.warning section, arrange for | |
111 | // the warning to be issued. SHNDX is the section index. Return | |
112 | // whether it is a warning section. | |
113 | ||
114 | bool | |
115 | Object::handle_gnu_warning_section(const char* name, unsigned int shndx, | |
116 | Symbol_table* symtab) | |
117 | { | |
118 | const char warn_prefix[] = ".gnu.warning."; | |
119 | const int warn_prefix_len = sizeof warn_prefix - 1; | |
120 | if (strncmp(name, warn_prefix, warn_prefix_len) == 0) | |
121 | { | |
122 | symtab->add_warning(name + warn_prefix_len, this, shndx); | |
123 | return true; | |
124 | } | |
125 | return false; | |
126 | } | |
127 | ||
f6ce93d6 | 128 | // Class Sized_relobj. |
bae7f79e ILT |
129 | |
130 | template<int size, bool big_endian> | |
f6ce93d6 | 131 | Sized_relobj<size, big_endian>::Sized_relobj( |
bae7f79e ILT |
132 | const std::string& name, |
133 | Input_file* input_file, | |
134 | off_t offset, | |
135 | const elfcpp::Ehdr<size, big_endian>& ehdr) | |
f6ce93d6 | 136 | : Relobj(name, input_file, offset), |
645f8123 | 137 | elf_file_(this, ehdr), |
dbe717ef | 138 | symtab_shndx_(-1U), |
61ba1cf9 ILT |
139 | local_symbol_count_(0), |
140 | output_local_symbol_count_(0), | |
75f65a3e | 141 | symbols_(NULL), |
61ba1cf9 | 142 | local_symbol_offset_(0), |
e727fa71 ILT |
143 | local_values_(), |
144 | local_got_offsets_() | |
bae7f79e | 145 | { |
bae7f79e ILT |
146 | } |
147 | ||
148 | template<int size, bool big_endian> | |
f6ce93d6 | 149 | Sized_relobj<size, big_endian>::~Sized_relobj() |
bae7f79e ILT |
150 | { |
151 | } | |
152 | ||
645f8123 | 153 | // Set up an object file based on the file header. This sets up the |
bae7f79e ILT |
154 | // target and reads the section information. |
155 | ||
156 | template<int size, bool big_endian> | |
157 | void | |
f6ce93d6 | 158 | Sized_relobj<size, big_endian>::setup( |
bae7f79e ILT |
159 | const elfcpp::Ehdr<size, big_endian>& ehdr) |
160 | { | |
dbe717ef ILT |
161 | this->set_target(ehdr.get_e_machine(), size, big_endian, |
162 | ehdr.get_e_ident()[elfcpp::EI_OSABI], | |
163 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); | |
12e14209 | 164 | |
dbe717ef | 165 | const unsigned int shnum = this->elf_file_.shnum(); |
a2fb1b05 | 166 | this->set_shnum(shnum); |
dbe717ef | 167 | } |
12e14209 | 168 | |
dbe717ef ILT |
169 | // Find the SHT_SYMTAB section, given the section headers. The ELF |
170 | // standard says that maybe in the future there can be more than one | |
171 | // SHT_SYMTAB section. Until somebody figures out how that could | |
172 | // work, we assume there is only one. | |
12e14209 | 173 | |
dbe717ef ILT |
174 | template<int size, bool big_endian> |
175 | void | |
176 | Sized_relobj<size, big_endian>::find_symtab(const unsigned char* pshdrs) | |
177 | { | |
178 | const unsigned int shnum = this->shnum(); | |
179 | this->symtab_shndx_ = 0; | |
180 | if (shnum > 0) | |
bae7f79e | 181 | { |
dbe717ef ILT |
182 | // Look through the sections in reverse order, since gas tends |
183 | // to put the symbol table at the end. | |
184 | const unsigned char* p = pshdrs + shnum * This::shdr_size; | |
185 | unsigned int i = shnum; | |
186 | while (i > 0) | |
bae7f79e | 187 | { |
dbe717ef ILT |
188 | --i; |
189 | p -= This::shdr_size; | |
190 | typename This::Shdr shdr(p); | |
191 | if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB) | |
192 | { | |
193 | this->symtab_shndx_ = i; | |
194 | break; | |
195 | } | |
bae7f79e | 196 | } |
bae7f79e ILT |
197 | } |
198 | } | |
199 | ||
12e14209 | 200 | // Read the sections and symbols from an object file. |
bae7f79e ILT |
201 | |
202 | template<int size, bool big_endian> | |
12e14209 | 203 | void |
f6ce93d6 | 204 | Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) |
bae7f79e | 205 | { |
dbe717ef | 206 | this->read_section_data(&this->elf_file_, sd); |
12e14209 | 207 | |
dbe717ef ILT |
208 | const unsigned char* const pshdrs = sd->section_headers->data(); |
209 | ||
210 | this->find_symtab(pshdrs); | |
12e14209 | 211 | |
75f2446e ILT |
212 | sd->symbols = NULL; |
213 | sd->symbols_size = 0; | |
214 | sd->symbol_names = NULL; | |
215 | sd->symbol_names_size = 0; | |
216 | ||
645f8123 | 217 | if (this->symtab_shndx_ == 0) |
bae7f79e ILT |
218 | { |
219 | // No symbol table. Weird but legal. | |
12e14209 | 220 | return; |
bae7f79e ILT |
221 | } |
222 | ||
12e14209 ILT |
223 | // Get the symbol table section header. |
224 | typename This::Shdr symtabshdr(pshdrs | |
645f8123 | 225 | + this->symtab_shndx_ * This::shdr_size); |
a3ad94ed | 226 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
bae7f79e | 227 | |
75f65a3e ILT |
228 | // We only need the external symbols. |
229 | const int sym_size = This::sym_size; | |
92e059d8 ILT |
230 | const unsigned int loccount = symtabshdr.get_sh_info(); |
231 | this->local_symbol_count_ = loccount; | |
232 | off_t locsize = loccount * sym_size; | |
75f65a3e ILT |
233 | off_t extoff = symtabshdr.get_sh_offset() + locsize; |
234 | off_t extsize = symtabshdr.get_sh_size() - locsize; | |
235 | ||
bae7f79e | 236 | // Read the symbol table. |
9eb9fa57 | 237 | File_view* fvsymtab = this->get_lasting_view(extoff, extsize, false); |
bae7f79e ILT |
238 | |
239 | // Read the section header for the symbol names. | |
dbe717ef ILT |
240 | unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
241 | if (strtab_shndx >= this->shnum()) | |
bae7f79e | 242 | { |
75f2446e ILT |
243 | this->error(_("invalid symbol table name index: %u"), strtab_shndx); |
244 | return; | |
bae7f79e | 245 | } |
dbe717ef | 246 | typename This::Shdr strtabshdr(pshdrs + strtab_shndx * This::shdr_size); |
bae7f79e ILT |
247 | if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB) |
248 | { | |
75f2446e ILT |
249 | this->error(_("symbol table name section has wrong type: %u"), |
250 | static_cast<unsigned int>(strtabshdr.get_sh_type())); | |
251 | return; | |
bae7f79e ILT |
252 | } |
253 | ||
254 | // Read the symbol names. | |
255 | File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(), | |
9eb9fa57 | 256 | strtabshdr.get_sh_size(), true); |
bae7f79e | 257 | |
12e14209 ILT |
258 | sd->symbols = fvsymtab; |
259 | sd->symbols_size = extsize; | |
260 | sd->symbol_names = fvstrtab; | |
261 | sd->symbol_names_size = strtabshdr.get_sh_size(); | |
a2fb1b05 ILT |
262 | } |
263 | ||
264 | // Return whether to include a section group in the link. LAYOUT is | |
265 | // used to keep track of which section groups we have already seen. | |
266 | // INDEX is the index of the section group and SHDR is the section | |
267 | // header. If we do not want to include this group, we set bits in | |
268 | // OMIT for each section which should be discarded. | |
269 | ||
270 | template<int size, bool big_endian> | |
271 | bool | |
f6ce93d6 | 272 | Sized_relobj<size, big_endian>::include_section_group( |
a2fb1b05 ILT |
273 | Layout* layout, |
274 | unsigned int index, | |
275 | const elfcpp::Shdr<size, big_endian>& shdr, | |
276 | std::vector<bool>* omit) | |
277 | { | |
278 | // Read the section contents. | |
279 | const unsigned char* pcon = this->get_view(shdr.get_sh_offset(), | |
9eb9fa57 | 280 | shdr.get_sh_size(), false); |
a2fb1b05 ILT |
281 | const elfcpp::Elf_Word* pword = |
282 | reinterpret_cast<const elfcpp::Elf_Word*>(pcon); | |
283 | ||
284 | // The first word contains flags. We only care about COMDAT section | |
285 | // groups. Other section groups are always included in the link | |
286 | // just like ordinary sections. | |
f6ce93d6 | 287 | elfcpp::Elf_Word flags = elfcpp::Swap<32, big_endian>::readval(pword); |
a2fb1b05 ILT |
288 | if ((flags & elfcpp::GRP_COMDAT) == 0) |
289 | return true; | |
290 | ||
291 | // Look up the group signature, which is the name of a symbol. This | |
292 | // is a lot of effort to go to to read a string. Why didn't they | |
293 | // just use the name of the SHT_GROUP section as the group | |
294 | // signature? | |
295 | ||
296 | // Get the appropriate symbol table header (this will normally be | |
297 | // the single SHT_SYMTAB section, but in principle it need not be). | |
645f8123 ILT |
298 | const unsigned int link = shdr.get_sh_link(); |
299 | typename This::Shdr symshdr(this, this->elf_file_.section_header(link)); | |
a2fb1b05 ILT |
300 | |
301 | // Read the symbol table entry. | |
302 | if (shdr.get_sh_info() >= symshdr.get_sh_size() / This::sym_size) | |
303 | { | |
75f2446e ILT |
304 | this->error(_("section group %u info %u out of range"), |
305 | index, shdr.get_sh_info()); | |
306 | return false; | |
a2fb1b05 ILT |
307 | } |
308 | off_t symoff = symshdr.get_sh_offset() + shdr.get_sh_info() * This::sym_size; | |
9eb9fa57 | 309 | const unsigned char* psym = this->get_view(symoff, This::sym_size, true); |
a2fb1b05 ILT |
310 | elfcpp::Sym<size, big_endian> sym(psym); |
311 | ||
a2fb1b05 | 312 | // Read the symbol table names. |
645f8123 ILT |
313 | off_t symnamelen; |
314 | const unsigned char* psymnamesu; | |
9eb9fa57 ILT |
315 | psymnamesu = this->section_contents(symshdr.get_sh_link(), &symnamelen, |
316 | true); | |
a2fb1b05 ILT |
317 | const char* psymnames = reinterpret_cast<const char*>(psymnamesu); |
318 | ||
319 | // Get the section group signature. | |
645f8123 | 320 | if (sym.get_st_name() >= symnamelen) |
a2fb1b05 | 321 | { |
75f2446e ILT |
322 | this->error(_("symbol %u name offset %u out of range"), |
323 | shdr.get_sh_info(), sym.get_st_name()); | |
324 | return false; | |
a2fb1b05 ILT |
325 | } |
326 | ||
327 | const char* signature = psymnames + sym.get_st_name(); | |
328 | ||
ead1e424 ILT |
329 | // It seems that some versions of gas will create a section group |
330 | // associated with a section symbol, and then fail to give a name to | |
331 | // the section symbol. In such a case, use the name of the section. | |
332 | // FIXME. | |
645f8123 ILT |
333 | std::string secname; |
334 | if (signature[0] == '\0' && sym.get_st_type() == elfcpp::STT_SECTION) | |
ead1e424 | 335 | { |
645f8123 ILT |
336 | secname = this->section_name(sym.get_st_shndx()); |
337 | signature = secname.c_str(); | |
ead1e424 ILT |
338 | } |
339 | ||
a2fb1b05 ILT |
340 | // Record this section group, and see whether we've already seen one |
341 | // with the same signature. | |
342 | if (layout->add_comdat(signature, true)) | |
343 | return true; | |
344 | ||
345 | // This is a duplicate. We want to discard the sections in this | |
346 | // group. | |
347 | size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word); | |
348 | for (size_t i = 1; i < count; ++i) | |
349 | { | |
f6ce93d6 ILT |
350 | elfcpp::Elf_Word secnum = |
351 | elfcpp::Swap<32, big_endian>::readval(pword + i); | |
a2fb1b05 ILT |
352 | if (secnum >= this->shnum()) |
353 | { | |
75f2446e ILT |
354 | this->error(_("section %u in section group %u out of range"), |
355 | secnum, index); | |
356 | continue; | |
a2fb1b05 ILT |
357 | } |
358 | (*omit)[secnum] = true; | |
359 | } | |
360 | ||
361 | return false; | |
362 | } | |
363 | ||
364 | // Whether to include a linkonce section in the link. NAME is the | |
365 | // name of the section and SHDR is the section header. | |
366 | ||
367 | // Linkonce sections are a GNU extension implemented in the original | |
368 | // GNU linker before section groups were defined. The semantics are | |
369 | // that we only include one linkonce section with a given name. The | |
370 | // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME, | |
371 | // where T is the type of section and SYMNAME is the name of a symbol. | |
372 | // In an attempt to make linkonce sections interact well with section | |
373 | // groups, we try to identify SYMNAME and use it like a section group | |
374 | // signature. We want to block section groups with that signature, | |
375 | // but not other linkonce sections with that signature. We also use | |
376 | // the full name of the linkonce section as a normal section group | |
377 | // signature. | |
378 | ||
379 | template<int size, bool big_endian> | |
380 | bool | |
f6ce93d6 | 381 | Sized_relobj<size, big_endian>::include_linkonce_section( |
a2fb1b05 ILT |
382 | Layout* layout, |
383 | const char* name, | |
384 | const elfcpp::Shdr<size, big_endian>&) | |
385 | { | |
ad435a24 ILT |
386 | // In general the symbol name we want will be the string following |
387 | // the last '.'. However, we have to handle the case of | |
388 | // .gnu.linkonce.t.__i686.get_pc_thunk.bx, which was generated by | |
389 | // some versions of gcc. So we use a heuristic: if the name starts | |
390 | // with ".gnu.linkonce.t.", we use everything after that. Otherwise | |
391 | // we look for the last '.'. We can't always simply skip | |
392 | // ".gnu.linkonce.X", because we have to deal with cases like | |
393 | // ".gnu.linkonce.d.rel.ro.local". | |
394 | const char* const linkonce_t = ".gnu.linkonce.t."; | |
395 | const char* symname; | |
396 | if (strncmp(name, linkonce_t, strlen(linkonce_t)) == 0) | |
397 | symname = name + strlen(linkonce_t); | |
398 | else | |
399 | symname = strrchr(name, '.') + 1; | |
a783673b ILT |
400 | bool include1 = layout->add_comdat(symname, false); |
401 | bool include2 = layout->add_comdat(name, true); | |
402 | return include1 && include2; | |
a2fb1b05 ILT |
403 | } |
404 | ||
405 | // Lay out the input sections. We walk through the sections and check | |
406 | // whether they should be included in the link. If they should, we | |
407 | // pass them to the Layout object, which will return an output section | |
408 | // and an offset. | |
409 | ||
410 | template<int size, bool big_endian> | |
411 | void | |
7e1edb90 | 412 | Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab, |
f6ce93d6 | 413 | Layout* layout, |
12e14209 | 414 | Read_symbols_data* sd) |
a2fb1b05 | 415 | { |
dbe717ef | 416 | const unsigned int shnum = this->shnum(); |
12e14209 ILT |
417 | if (shnum == 0) |
418 | return; | |
a2fb1b05 ILT |
419 | |
420 | // Get the section headers. | |
12e14209 | 421 | const unsigned char* pshdrs = sd->section_headers->data(); |
a2fb1b05 ILT |
422 | |
423 | // Get the section names. | |
12e14209 | 424 | const unsigned char* pnamesu = sd->section_names->data(); |
a2fb1b05 ILT |
425 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
426 | ||
427 | std::vector<Map_to_output>& map_sections(this->map_to_output()); | |
61ba1cf9 | 428 | map_sections.resize(shnum); |
a2fb1b05 | 429 | |
35cdfc9a ILT |
430 | // Whether we've seen a .note.GNU-stack section. |
431 | bool seen_gnu_stack = false; | |
432 | // The flags of a .note.GNU-stack section. | |
433 | uint64_t gnu_stack_flags = 0; | |
434 | ||
a2fb1b05 ILT |
435 | // Keep track of which sections to omit. |
436 | std::vector<bool> omit(shnum, false); | |
437 | ||
f6ce93d6 ILT |
438 | // Skip the first, dummy, section. |
439 | pshdrs += This::shdr_size; | |
440 | for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size) | |
a2fb1b05 | 441 | { |
75f65a3e | 442 | typename This::Shdr shdr(pshdrs); |
a2fb1b05 | 443 | |
12e14209 | 444 | if (shdr.get_sh_name() >= sd->section_names_size) |
a2fb1b05 | 445 | { |
75f2446e ILT |
446 | this->error(_("bad section name offset for section %u: %lu"), |
447 | i, static_cast<unsigned long>(shdr.get_sh_name())); | |
448 | return; | |
a2fb1b05 ILT |
449 | } |
450 | ||
451 | const char* name = pnames + shdr.get_sh_name(); | |
452 | ||
dbe717ef | 453 | if (this->handle_gnu_warning_section(name, i, symtab)) |
f6ce93d6 | 454 | { |
7e1edb90 | 455 | if (!parameters->output_is_object()) |
f6ce93d6 ILT |
456 | omit[i] = true; |
457 | } | |
458 | ||
35cdfc9a ILT |
459 | // The .note.GNU-stack section is special. It gives the |
460 | // protection flags that this object file requires for the stack | |
461 | // in memory. | |
462 | if (strcmp(name, ".note.GNU-stack") == 0) | |
463 | { | |
464 | seen_gnu_stack = true; | |
465 | gnu_stack_flags |= shdr.get_sh_flags(); | |
466 | omit[i] = true; | |
467 | } | |
468 | ||
a2fb1b05 ILT |
469 | bool discard = omit[i]; |
470 | if (!discard) | |
471 | { | |
472 | if (shdr.get_sh_type() == elfcpp::SHT_GROUP) | |
473 | { | |
474 | if (!this->include_section_group(layout, i, shdr, &omit)) | |
475 | discard = true; | |
476 | } | |
cba134d6 ILT |
477 | else if ((shdr.get_sh_flags() & elfcpp::SHF_GROUP) == 0 |
478 | && Layout::is_linkonce(name)) | |
a2fb1b05 ILT |
479 | { |
480 | if (!this->include_linkonce_section(layout, name, shdr)) | |
481 | discard = true; | |
482 | } | |
483 | } | |
484 | ||
485 | if (discard) | |
486 | { | |
487 | // Do not include this section in the link. | |
488 | map_sections[i].output_section = NULL; | |
489 | continue; | |
490 | } | |
491 | ||
492 | off_t offset; | |
ead1e424 | 493 | Output_section* os = layout->layout(this, i, name, shdr, &offset); |
a2fb1b05 ILT |
494 | |
495 | map_sections[i].output_section = os; | |
496 | map_sections[i].offset = offset; | |
12e14209 ILT |
497 | } |
498 | ||
35cdfc9a ILT |
499 | layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags); |
500 | ||
12e14209 ILT |
501 | delete sd->section_headers; |
502 | sd->section_headers = NULL; | |
503 | delete sd->section_names; | |
504 | sd->section_names = NULL; | |
505 | } | |
506 | ||
507 | // Add the symbols to the symbol table. | |
508 | ||
509 | template<int size, bool big_endian> | |
510 | void | |
f6ce93d6 | 511 | Sized_relobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, |
12e14209 ILT |
512 | Read_symbols_data* sd) |
513 | { | |
514 | if (sd->symbols == NULL) | |
515 | { | |
a3ad94ed | 516 | gold_assert(sd->symbol_names == NULL); |
12e14209 ILT |
517 | return; |
518 | } | |
a2fb1b05 | 519 | |
12e14209 ILT |
520 | const int sym_size = This::sym_size; |
521 | size_t symcount = sd->symbols_size / sym_size; | |
f5c3f225 | 522 | if (static_cast<off_t>(symcount * sym_size) != sd->symbols_size) |
12e14209 | 523 | { |
75f2446e ILT |
524 | this->error(_("size of symbols is not multiple of symbol size")); |
525 | return; | |
a2fb1b05 | 526 | } |
12e14209 ILT |
527 | |
528 | this->symbols_ = new Symbol*[symcount]; | |
529 | ||
12e14209 ILT |
530 | const char* sym_names = |
531 | reinterpret_cast<const char*>(sd->symbol_names->data()); | |
193a53d9 | 532 | symtab->add_from_relobj(this, sd->symbols->data(), symcount, sym_names, |
dbe717ef | 533 | sd->symbol_names_size, this->symbols_); |
12e14209 ILT |
534 | |
535 | delete sd->symbols; | |
536 | sd->symbols = NULL; | |
537 | delete sd->symbol_names; | |
538 | sd->symbol_names = NULL; | |
bae7f79e ILT |
539 | } |
540 | ||
75f65a3e | 541 | // Finalize the local symbols. Here we record the file offset at |
61ba1cf9 | 542 | // which they should be output, we add their names to *POOL, and we |
b8e6aad9 ILT |
543 | // add their values to THIS->LOCAL_VALUES_. Return the symbol index. |
544 | // This function is always called from the main thread. The actual | |
545 | // output of the local symbols will occur in a separate task. | |
75f65a3e ILT |
546 | |
547 | template<int size, bool big_endian> | |
c06b7b0b ILT |
548 | unsigned int |
549 | Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index, | |
550 | off_t off, | |
75f65a3e ILT |
551 | Stringpool* pool) |
552 | { | |
a3ad94ed | 553 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 554 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
555 | { |
556 | // This object has no symbols. Weird but legal. | |
c06b7b0b | 557 | return index; |
61ba1cf9 ILT |
558 | } |
559 | ||
a3ad94ed | 560 | gold_assert(off == static_cast<off_t>(align_address(off, size >> 3))); |
61ba1cf9 | 561 | |
75f65a3e ILT |
562 | this->local_symbol_offset_ = off; |
563 | ||
564 | // Read the symbol table section header. | |
645f8123 ILT |
565 | const unsigned int symtab_shndx = this->symtab_shndx_; |
566 | typename This::Shdr symtabshdr(this, | |
567 | this->elf_file_.section_header(symtab_shndx)); | |
a3ad94ed | 568 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
75f65a3e ILT |
569 | |
570 | // Read the local symbols. | |
75f65a3e | 571 | const int sym_size = This::sym_size; |
92e059d8 | 572 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 573 | gold_assert(loccount == symtabshdr.get_sh_info()); |
75f65a3e ILT |
574 | off_t locsize = loccount * sym_size; |
575 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), | |
9eb9fa57 | 576 | locsize, true); |
75f65a3e | 577 | |
c06b7b0b | 578 | this->local_values_.resize(loccount); |
61ba1cf9 | 579 | |
75f65a3e | 580 | // Read the symbol names. |
645f8123 ILT |
581 | const unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
582 | off_t strtab_size; | |
583 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, | |
9eb9fa57 ILT |
584 | &strtab_size, |
585 | true); | |
75f65a3e ILT |
586 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
587 | ||
588 | // Loop over the local symbols. | |
589 | ||
c06b7b0b | 590 | const std::vector<Map_to_output>& mo(this->map_to_output()); |
75f65a3e | 591 | unsigned int shnum = this->shnum(); |
61ba1cf9 | 592 | unsigned int count = 0; |
75f65a3e ILT |
593 | // Skip the first, dummy, symbol. |
594 | psyms += sym_size; | |
61ba1cf9 | 595 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
75f65a3e ILT |
596 | { |
597 | elfcpp::Sym<size, big_endian> sym(psyms); | |
598 | ||
b8e6aad9 ILT |
599 | Symbol_value<size>& lv(this->local_values_[i]); |
600 | ||
75f65a3e | 601 | unsigned int shndx = sym.get_st_shndx(); |
b8e6aad9 | 602 | lv.set_input_shndx(shndx); |
75f65a3e | 603 | |
063f12a8 ILT |
604 | if (sym.get_st_type() == elfcpp::STT_SECTION) |
605 | lv.set_is_section_symbol(); | |
606 | ||
75f65a3e ILT |
607 | if (shndx >= elfcpp::SHN_LORESERVE) |
608 | { | |
61ba1cf9 | 609 | if (shndx == elfcpp::SHN_ABS) |
b8e6aad9 | 610 | lv.set_output_value(sym.get_st_value()); |
61ba1cf9 | 611 | else |
75f65a3e | 612 | { |
61ba1cf9 | 613 | // FIXME: Handle SHN_XINDEX. |
75f2446e ILT |
614 | this->error(_("unknown section index %u for local symbol %u"), |
615 | shndx, i); | |
616 | lv.set_output_value(0); | |
75f65a3e | 617 | } |
75f65a3e ILT |
618 | } |
619 | else | |
620 | { | |
621 | if (shndx >= shnum) | |
622 | { | |
75f2446e ILT |
623 | this->error(_("local symbol %u section index %u out of range"), |
624 | i, shndx); | |
625 | shndx = 0; | |
75f65a3e ILT |
626 | } |
627 | ||
b8e6aad9 ILT |
628 | Output_section* os = mo[shndx].output_section; |
629 | ||
630 | if (os == NULL) | |
61ba1cf9 | 631 | { |
b8e6aad9 ILT |
632 | lv.set_output_value(0); |
633 | lv.set_no_output_symtab_entry(); | |
61ba1cf9 ILT |
634 | continue; |
635 | } | |
636 | ||
b8e6aad9 ILT |
637 | if (mo[shndx].offset == -1) |
638 | lv.set_input_value(sym.get_st_value()); | |
639 | else | |
640 | lv.set_output_value(mo[shndx].output_section->address() | |
641 | + mo[shndx].offset | |
642 | + sym.get_st_value()); | |
75f65a3e ILT |
643 | } |
644 | ||
c06b7b0b ILT |
645 | // Decide whether this symbol should go into the output file. |
646 | ||
647 | if (sym.get_st_type() == elfcpp::STT_SECTION) | |
f6ce93d6 | 648 | { |
b8e6aad9 | 649 | lv.set_no_output_symtab_entry(); |
c06b7b0b ILT |
650 | continue; |
651 | } | |
645f8123 | 652 | |
c06b7b0b ILT |
653 | if (sym.get_st_name() >= strtab_size) |
654 | { | |
75f2446e ILT |
655 | this->error(_("local symbol %u section name out of range: %u >= %u"), |
656 | i, sym.get_st_name(), | |
657 | static_cast<unsigned int>(strtab_size)); | |
658 | lv.set_no_output_symtab_entry(); | |
659 | continue; | |
f6ce93d6 | 660 | } |
c06b7b0b ILT |
661 | |
662 | const char* name = pnames + sym.get_st_name(); | |
cfd73a4e | 663 | pool->add(name, true, NULL); |
b8e6aad9 | 664 | lv.set_output_symtab_index(index); |
c06b7b0b | 665 | ++index; |
c06b7b0b | 666 | ++count; |
75f65a3e ILT |
667 | } |
668 | ||
61ba1cf9 ILT |
669 | this->output_local_symbol_count_ = count; |
670 | ||
c06b7b0b | 671 | return index; |
75f65a3e ILT |
672 | } |
673 | ||
e727fa71 ILT |
674 | // Return the value of the local symbol symndx. |
675 | template<int size, bool big_endian> | |
676 | typename elfcpp::Elf_types<size>::Elf_Addr | |
677 | Sized_relobj<size, big_endian>::local_symbol_value(unsigned int symndx) const | |
678 | { | |
679 | gold_assert(symndx < this->local_symbol_count_); | |
680 | gold_assert(symndx < this->local_values_.size()); | |
681 | const Symbol_value<size>& lv(this->local_values_[symndx]); | |
682 | return lv.value(this, 0); | |
683 | } | |
684 | ||
b8e6aad9 | 685 | // Return the value of a local symbol defined in input section SHNDX, |
063f12a8 ILT |
686 | // with value VALUE, adding addend ADDEND. IS_SECTION_SYMBOL |
687 | // indicates whether the symbol is a section symbol. This handles | |
688 | // SHF_MERGE sections. | |
b8e6aad9 ILT |
689 | template<int size, bool big_endian> |
690 | typename elfcpp::Elf_types<size>::Elf_Addr | |
691 | Sized_relobj<size, big_endian>::local_value(unsigned int shndx, | |
692 | Address value, | |
063f12a8 | 693 | bool is_section_symbol, |
b8e6aad9 ILT |
694 | Address addend) const |
695 | { | |
696 | const std::vector<Map_to_output>& mo(this->map_to_output()); | |
697 | Output_section* os = mo[shndx].output_section; | |
698 | if (os == NULL) | |
699 | return addend; | |
700 | gold_assert(mo[shndx].offset == -1); | |
063f12a8 ILT |
701 | |
702 | // Do the mapping required by the output section. If this is not a | |
703 | // section symbol, then we want to map the symbol value, and then | |
704 | // include the addend. If this is a section symbol, then we need to | |
705 | // include the addend to figure out where in the section we are, | |
706 | // before we do the mapping. This will do the right thing provided | |
707 | // the assembler is careful to only convert a relocation in a merged | |
708 | // section to a section symbol if there is a zero addend. If the | |
709 | // assembler does not do this, then in general we can't know what to | |
710 | // do, because we can't distinguish the addend for the instruction | |
711 | // format from the addend for the section offset. | |
712 | ||
713 | if (is_section_symbol) | |
714 | return os->output_address(this, shndx, value + addend); | |
715 | else | |
716 | return addend + os->output_address(this, shndx, value); | |
b8e6aad9 ILT |
717 | } |
718 | ||
61ba1cf9 ILT |
719 | // Write out the local symbols. |
720 | ||
721 | template<int size, bool big_endian> | |
722 | void | |
f6ce93d6 | 723 | Sized_relobj<size, big_endian>::write_local_symbols(Output_file* of, |
61ba1cf9 ILT |
724 | const Stringpool* sympool) |
725 | { | |
9e2dcb77 ILT |
726 | if (parameters->strip_all()) |
727 | return; | |
728 | ||
a3ad94ed | 729 | gold_assert(this->symtab_shndx_ != -1U); |
645f8123 | 730 | if (this->symtab_shndx_ == 0) |
61ba1cf9 ILT |
731 | { |
732 | // This object has no symbols. Weird but legal. | |
733 | return; | |
734 | } | |
735 | ||
736 | // Read the symbol table section header. | |
645f8123 ILT |
737 | const unsigned int symtab_shndx = this->symtab_shndx_; |
738 | typename This::Shdr symtabshdr(this, | |
739 | this->elf_file_.section_header(symtab_shndx)); | |
a3ad94ed | 740 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
92e059d8 | 741 | const unsigned int loccount = this->local_symbol_count_; |
a3ad94ed | 742 | gold_assert(loccount == symtabshdr.get_sh_info()); |
61ba1cf9 ILT |
743 | |
744 | // Read the local symbols. | |
745 | const int sym_size = This::sym_size; | |
92e059d8 | 746 | off_t locsize = loccount * sym_size; |
61ba1cf9 | 747 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), |
9eb9fa57 | 748 | locsize, false); |
61ba1cf9 | 749 | |
61ba1cf9 | 750 | // Read the symbol names. |
645f8123 ILT |
751 | const unsigned int strtab_shndx = symtabshdr.get_sh_link(); |
752 | off_t strtab_size; | |
753 | const unsigned char* pnamesu = this->section_contents(strtab_shndx, | |
9eb9fa57 ILT |
754 | &strtab_size, |
755 | true); | |
61ba1cf9 ILT |
756 | const char* pnames = reinterpret_cast<const char*>(pnamesu); |
757 | ||
758 | // Get a view into the output file. | |
759 | off_t output_size = this->output_local_symbol_count_ * sym_size; | |
760 | unsigned char* oview = of->get_output_view(this->local_symbol_offset_, | |
761 | output_size); | |
762 | ||
c06b7b0b ILT |
763 | const std::vector<Map_to_output>& mo(this->map_to_output()); |
764 | ||
a3ad94ed | 765 | gold_assert(this->local_values_.size() == loccount); |
61ba1cf9 | 766 | |
61ba1cf9 | 767 | unsigned char* ov = oview; |
c06b7b0b | 768 | psyms += sym_size; |
92e059d8 | 769 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
61ba1cf9 ILT |
770 | { |
771 | elfcpp::Sym<size, big_endian> isym(psyms); | |
f6ce93d6 | 772 | |
b8e6aad9 | 773 | if (!this->local_values_[i].needs_output_symtab_entry()) |
f6ce93d6 | 774 | continue; |
61ba1cf9 ILT |
775 | |
776 | unsigned int st_shndx = isym.get_st_shndx(); | |
777 | if (st_shndx < elfcpp::SHN_LORESERVE) | |
778 | { | |
a3ad94ed | 779 | gold_assert(st_shndx < mo.size()); |
61ba1cf9 ILT |
780 | if (mo[st_shndx].output_section == NULL) |
781 | continue; | |
ead1e424 | 782 | st_shndx = mo[st_shndx].output_section->out_shndx(); |
61ba1cf9 ILT |
783 | } |
784 | ||
f6ce93d6 ILT |
785 | elfcpp::Sym_write<size, big_endian> osym(ov); |
786 | ||
a3ad94ed | 787 | gold_assert(isym.get_st_name() < strtab_size); |
c06b7b0b ILT |
788 | const char* name = pnames + isym.get_st_name(); |
789 | osym.put_st_name(sympool->get_offset(name)); | |
b8e6aad9 | 790 | osym.put_st_value(this->local_values_[i].value(this, 0)); |
61ba1cf9 ILT |
791 | osym.put_st_size(isym.get_st_size()); |
792 | osym.put_st_info(isym.get_st_info()); | |
793 | osym.put_st_other(isym.get_st_other()); | |
794 | osym.put_st_shndx(st_shndx); | |
795 | ||
796 | ov += sym_size; | |
797 | } | |
798 | ||
a3ad94ed | 799 | gold_assert(ov - oview == output_size); |
61ba1cf9 ILT |
800 | |
801 | of->write_output_view(this->local_symbol_offset_, output_size, oview); | |
802 | } | |
803 | ||
54dc6425 ILT |
804 | // Input_objects methods. |
805 | ||
008db82e ILT |
806 | // Add a regular relocatable object to the list. Return false if this |
807 | // object should be ignored. | |
f6ce93d6 | 808 | |
008db82e | 809 | bool |
54dc6425 ILT |
810 | Input_objects::add_object(Object* obj) |
811 | { | |
008db82e | 812 | if (!obj->is_dynamic()) |
f6ce93d6 | 813 | this->relobj_list_.push_back(static_cast<Relobj*>(obj)); |
008db82e ILT |
814 | else |
815 | { | |
816 | // See if this is a duplicate SONAME. | |
817 | Dynobj* dynobj = static_cast<Dynobj*>(obj); | |
818 | ||
819 | std::pair<Unordered_set<std::string>::iterator, bool> ins = | |
820 | this->sonames_.insert(dynobj->soname()); | |
821 | if (!ins.second) | |
822 | { | |
823 | // We have already seen a dynamic object with this soname. | |
824 | return false; | |
825 | } | |
826 | ||
827 | this->dynobj_list_.push_back(dynobj); | |
828 | } | |
75f65a3e ILT |
829 | |
830 | Target* target = obj->target(); | |
831 | if (this->target_ == NULL) | |
832 | this->target_ = target; | |
833 | else if (this->target_ != target) | |
834 | { | |
75f2446e ILT |
835 | gold_error(_("%s: incompatible target"), obj->name().c_str()); |
836 | return false; | |
75f65a3e | 837 | } |
008db82e | 838 | |
9025d29d ILT |
839 | set_parameters_size_and_endianness(target->get_size(), |
840 | target->is_big_endian()); | |
841 | ||
008db82e | 842 | return true; |
54dc6425 ILT |
843 | } |
844 | ||
92e059d8 ILT |
845 | // Relocate_info methods. |
846 | ||
847 | // Return a string describing the location of a relocation. This is | |
848 | // only used in error messages. | |
849 | ||
850 | template<int size, bool big_endian> | |
851 | std::string | |
852 | Relocate_info<size, big_endian>::location(size_t relnum, off_t) const | |
853 | { | |
854 | std::string ret(this->object->name()); | |
855 | ret += ": reloc "; | |
856 | char buf[100]; | |
857 | snprintf(buf, sizeof buf, "%zu", relnum); | |
858 | ret += buf; | |
859 | ret += " in reloc section "; | |
860 | snprintf(buf, sizeof buf, "%u", this->reloc_shndx); | |
861 | ret += buf; | |
862 | ret += " (" + this->object->section_name(this->reloc_shndx); | |
863 | ret += ") for section "; | |
864 | snprintf(buf, sizeof buf, "%u", this->data_shndx); | |
865 | ret += buf; | |
866 | ret += " (" + this->object->section_name(this->data_shndx) + ")"; | |
867 | return ret; | |
868 | } | |
869 | ||
bae7f79e ILT |
870 | } // End namespace gold. |
871 | ||
872 | namespace | |
873 | { | |
874 | ||
875 | using namespace gold; | |
876 | ||
877 | // Read an ELF file with the header and return the appropriate | |
878 | // instance of Object. | |
879 | ||
880 | template<int size, bool big_endian> | |
881 | Object* | |
882 | make_elf_sized_object(const std::string& name, Input_file* input_file, | |
883 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
884 | { | |
885 | int et = ehdr.get_e_type(); | |
bae7f79e ILT |
886 | if (et == elfcpp::ET_REL) |
887 | { | |
f6ce93d6 ILT |
888 | Sized_relobj<size, big_endian>* obj = |
889 | new Sized_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
bae7f79e ILT |
890 | obj->setup(ehdr); |
891 | return obj; | |
892 | } | |
dbe717ef ILT |
893 | else if (et == elfcpp::ET_DYN) |
894 | { | |
895 | Sized_dynobj<size, big_endian>* obj = | |
896 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
897 | obj->setup(ehdr); | |
898 | return obj; | |
899 | } | |
bae7f79e ILT |
900 | else |
901 | { | |
75f2446e ILT |
902 | gold_error(_("%s: unsupported ELF file type %d"), |
903 | name.c_str(), et); | |
904 | return NULL; | |
bae7f79e ILT |
905 | } |
906 | } | |
907 | ||
908 | } // End anonymous namespace. | |
909 | ||
910 | namespace gold | |
911 | { | |
912 | ||
913 | // Read an ELF file and return the appropriate instance of Object. | |
914 | ||
915 | Object* | |
916 | make_elf_object(const std::string& name, Input_file* input_file, off_t offset, | |
917 | const unsigned char* p, off_t bytes) | |
918 | { | |
919 | if (bytes < elfcpp::EI_NIDENT) | |
920 | { | |
75f2446e ILT |
921 | gold_error(_("%s: ELF file too short"), name.c_str()); |
922 | return NULL; | |
bae7f79e ILT |
923 | } |
924 | ||
925 | int v = p[elfcpp::EI_VERSION]; | |
926 | if (v != elfcpp::EV_CURRENT) | |
927 | { | |
928 | if (v == elfcpp::EV_NONE) | |
75f2446e | 929 | gold_error(_("%s: invalid ELF version 0"), name.c_str()); |
bae7f79e | 930 | else |
75f2446e ILT |
931 | gold_error(_("%s: unsupported ELF version %d"), name.c_str(), v); |
932 | return NULL; | |
bae7f79e ILT |
933 | } |
934 | ||
935 | int c = p[elfcpp::EI_CLASS]; | |
936 | if (c == elfcpp::ELFCLASSNONE) | |
937 | { | |
75f2446e ILT |
938 | gold_error(_("%s: invalid ELF class 0"), name.c_str()); |
939 | return NULL; | |
bae7f79e ILT |
940 | } |
941 | else if (c != elfcpp::ELFCLASS32 | |
942 | && c != elfcpp::ELFCLASS64) | |
943 | { | |
75f2446e ILT |
944 | gold_error(_("%s: unsupported ELF class %d"), name.c_str(), c); |
945 | return NULL; | |
bae7f79e ILT |
946 | } |
947 | ||
948 | int d = p[elfcpp::EI_DATA]; | |
949 | if (d == elfcpp::ELFDATANONE) | |
950 | { | |
75f2446e ILT |
951 | gold_error(_("%s: invalid ELF data encoding"), name.c_str()); |
952 | return NULL; | |
bae7f79e ILT |
953 | } |
954 | else if (d != elfcpp::ELFDATA2LSB | |
955 | && d != elfcpp::ELFDATA2MSB) | |
956 | { | |
75f2446e ILT |
957 | gold_error(_("%s: unsupported ELF data encoding %d"), name.c_str(), d); |
958 | return NULL; | |
bae7f79e ILT |
959 | } |
960 | ||
961 | bool big_endian = d == elfcpp::ELFDATA2MSB; | |
962 | ||
963 | if (c == elfcpp::ELFCLASS32) | |
964 | { | |
965 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
966 | { | |
75f2446e ILT |
967 | gold_error(_("%s: ELF file too short"), name.c_str()); |
968 | return NULL; | |
bae7f79e ILT |
969 | } |
970 | if (big_endian) | |
971 | { | |
193a53d9 | 972 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e ILT |
973 | elfcpp::Ehdr<32, true> ehdr(p); |
974 | return make_elf_sized_object<32, true>(name, input_file, | |
975 | offset, ehdr); | |
193a53d9 | 976 | #else |
75f2446e ILT |
977 | gold_error(_("%s: not configured to support " |
978 | "32-bit big-endian object"), | |
979 | name.c_str()); | |
980 | return NULL; | |
193a53d9 | 981 | #endif |
bae7f79e ILT |
982 | } |
983 | else | |
984 | { | |
193a53d9 | 985 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e ILT |
986 | elfcpp::Ehdr<32, false> ehdr(p); |
987 | return make_elf_sized_object<32, false>(name, input_file, | |
988 | offset, ehdr); | |
193a53d9 | 989 | #else |
75f2446e ILT |
990 | gold_error(_("%s: not configured to support " |
991 | "32-bit little-endian object"), | |
992 | name.c_str()); | |
993 | return NULL; | |
193a53d9 | 994 | #endif |
bae7f79e ILT |
995 | } |
996 | } | |
997 | else | |
998 | { | |
999 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
1000 | { | |
75f2446e ILT |
1001 | gold_error(_("%s: ELF file too short"), name.c_str()); |
1002 | return NULL; | |
bae7f79e ILT |
1003 | } |
1004 | if (big_endian) | |
1005 | { | |
193a53d9 | 1006 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e ILT |
1007 | elfcpp::Ehdr<64, true> ehdr(p); |
1008 | return make_elf_sized_object<64, true>(name, input_file, | |
1009 | offset, ehdr); | |
193a53d9 | 1010 | #else |
75f2446e ILT |
1011 | gold_error(_("%s: not configured to support " |
1012 | "64-bit big-endian object"), | |
1013 | name.c_str()); | |
1014 | return NULL; | |
193a53d9 | 1015 | #endif |
bae7f79e ILT |
1016 | } |
1017 | else | |
1018 | { | |
193a53d9 | 1019 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e ILT |
1020 | elfcpp::Ehdr<64, false> ehdr(p); |
1021 | return make_elf_sized_object<64, false>(name, input_file, | |
1022 | offset, ehdr); | |
193a53d9 | 1023 | #else |
75f2446e ILT |
1024 | gold_error(_("%s: not configured to support " |
1025 | "64-bit little-endian object"), | |
1026 | name.c_str()); | |
1027 | return NULL; | |
193a53d9 | 1028 | #endif |
bae7f79e ILT |
1029 | } |
1030 | } | |
1031 | } | |
1032 | ||
1033 | // Instantiate the templates we need. We could use the configure | |
1034 | // script to restrict this to only the ones for implemented targets. | |
1035 | ||
193a53d9 | 1036 | #ifdef HAVE_TARGET_32_LITTLE |
bae7f79e | 1037 | template |
f6ce93d6 | 1038 | class Sized_relobj<32, false>; |
193a53d9 | 1039 | #endif |
bae7f79e | 1040 | |
193a53d9 | 1041 | #ifdef HAVE_TARGET_32_BIG |
bae7f79e | 1042 | template |
f6ce93d6 | 1043 | class Sized_relobj<32, true>; |
193a53d9 | 1044 | #endif |
bae7f79e | 1045 | |
193a53d9 | 1046 | #ifdef HAVE_TARGET_64_LITTLE |
bae7f79e | 1047 | template |
f6ce93d6 | 1048 | class Sized_relobj<64, false>; |
193a53d9 | 1049 | #endif |
bae7f79e | 1050 | |
193a53d9 | 1051 | #ifdef HAVE_TARGET_64_BIG |
bae7f79e | 1052 | template |
f6ce93d6 | 1053 | class Sized_relobj<64, true>; |
193a53d9 | 1054 | #endif |
bae7f79e | 1055 | |
193a53d9 | 1056 | #ifdef HAVE_TARGET_32_LITTLE |
92e059d8 ILT |
1057 | template |
1058 | struct Relocate_info<32, false>; | |
193a53d9 | 1059 | #endif |
92e059d8 | 1060 | |
193a53d9 | 1061 | #ifdef HAVE_TARGET_32_BIG |
92e059d8 ILT |
1062 | template |
1063 | struct Relocate_info<32, true>; | |
193a53d9 | 1064 | #endif |
92e059d8 | 1065 | |
193a53d9 | 1066 | #ifdef HAVE_TARGET_64_LITTLE |
92e059d8 ILT |
1067 | template |
1068 | struct Relocate_info<64, false>; | |
193a53d9 | 1069 | #endif |
92e059d8 | 1070 | |
193a53d9 | 1071 | #ifdef HAVE_TARGET_64_BIG |
92e059d8 ILT |
1072 | template |
1073 | struct Relocate_info<64, true>; | |
193a53d9 | 1074 | #endif |
92e059d8 | 1075 | |
bae7f79e | 1076 | } // End namespace gold. |