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bae7f79e ILT |
1 | // object.cc -- support for an object file for linking in gold |
2 | ||
3 | #include "gold.h" | |
4 | ||
5 | #include <cerrno> | |
6 | #include <cstring> | |
7 | #include <cassert> | |
8 | ||
9 | #include "object.h" | |
14bfc3f5 | 10 | #include "target-select.h" |
a2fb1b05 | 11 | #include "layout.h" |
bae7f79e ILT |
12 | |
13 | namespace gold | |
14 | { | |
15 | ||
16 | // Class Object. | |
17 | ||
18 | const unsigned char* | |
19 | Object::get_view(off_t start, off_t size) | |
20 | { | |
21 | return this->input_file_->file().get_view(start + this->offset_, size); | |
22 | } | |
23 | ||
24 | void | |
25 | Object::read(off_t start, off_t size, void* p) | |
26 | { | |
27 | this->input_file_->file().read(start + this->offset_, size, p); | |
28 | } | |
29 | ||
30 | File_view* | |
31 | Object::get_lasting_view(off_t start, off_t size) | |
32 | { | |
33 | return this->input_file_->file().get_lasting_view(start + this->offset_, | |
34 | size); | |
35 | } | |
36 | ||
37 | // Class Sized_object. | |
38 | ||
39 | template<int size, bool big_endian> | |
40 | Sized_object<size, big_endian>::Sized_object( | |
41 | const std::string& name, | |
42 | Input_file* input_file, | |
43 | off_t offset, | |
44 | const elfcpp::Ehdr<size, big_endian>& ehdr) | |
14bfc3f5 | 45 | : Object(name, input_file, false, offset), |
bae7f79e | 46 | flags_(ehdr.get_e_flags()), |
bae7f79e | 47 | shoff_(ehdr.get_e_shoff()), |
bae7f79e | 48 | shstrndx_(0), |
14bfc3f5 ILT |
49 | symtab_shnum_(0), |
50 | symbols_(NULL) | |
bae7f79e | 51 | { |
a2fb1b05 | 52 | if (ehdr.get_e_ehsize() != This::ehdr_size) |
bae7f79e ILT |
53 | { |
54 | fprintf(stderr, _("%s: %s: bad e_ehsize field (%d != %d)\n"), | |
55 | program_name, this->name().c_str(), ehdr.get_e_ehsize(), | |
a2fb1b05 | 56 | This::ehdr_size); |
bae7f79e ILT |
57 | gold_exit(false); |
58 | } | |
a2fb1b05 | 59 | if (ehdr.get_e_shentsize() != This::shdr_size) |
bae7f79e ILT |
60 | { |
61 | fprintf(stderr, _("%s: %s: bad e_shentsize field (%d != %d)\n"), | |
62 | program_name, this->name().c_str(), ehdr.get_e_shentsize(), | |
a2fb1b05 | 63 | This::shdr_size); |
bae7f79e ILT |
64 | gold_exit(false); |
65 | } | |
66 | } | |
67 | ||
68 | template<int size, bool big_endian> | |
69 | Sized_object<size, big_endian>::~Sized_object() | |
70 | { | |
71 | } | |
72 | ||
73 | // Set up an object file bsaed on the file header. This sets up the | |
74 | // target and reads the section information. | |
75 | ||
76 | template<int size, bool big_endian> | |
77 | void | |
78 | Sized_object<size, big_endian>::setup( | |
79 | const elfcpp::Ehdr<size, big_endian>& ehdr) | |
80 | { | |
a2fb1b05 ILT |
81 | int machine = ehdr.get_e_machine(); |
82 | Target* target = select_target(machine, size, big_endian, | |
83 | ehdr.get_e_ident()[elfcpp::EI_OSABI], | |
84 | ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); | |
14bfc3f5 ILT |
85 | if (target == NULL) |
86 | { | |
87 | fprintf(stderr, _("%s: %s: unsupported ELF machine number %d\n"), | |
a2fb1b05 | 88 | program_name, this->name().c_str(), machine); |
14bfc3f5 ILT |
89 | gold_exit(false); |
90 | } | |
91 | this->set_target(target); | |
bae7f79e ILT |
92 | unsigned int shnum = ehdr.get_e_shnum(); |
93 | unsigned int shstrndx = ehdr.get_e_shstrndx(); | |
94 | if ((shnum == 0 || shstrndx == elfcpp::SHN_XINDEX) | |
95 | && this->shoff_ != 0) | |
96 | { | |
a2fb1b05 | 97 | const unsigned char* p = this->get_view (this->shoff_, This::shdr_size); |
bae7f79e ILT |
98 | elfcpp::Shdr<size, big_endian> shdr(p); |
99 | if (shnum == 0) | |
100 | shnum = shdr.get_sh_size(); | |
101 | if (shstrndx == elfcpp::SHN_XINDEX) | |
102 | shstrndx = shdr.get_sh_link(); | |
103 | } | |
a2fb1b05 | 104 | this->set_shnum(shnum); |
bae7f79e ILT |
105 | this->shstrndx_ = shstrndx; |
106 | ||
107 | if (shnum == 0) | |
108 | return; | |
109 | ||
110 | // Find the SHT_SYMTAB section. | |
a2fb1b05 ILT |
111 | const unsigned char* p = this->get_view (this->shoff_, |
112 | shnum * This::shdr_size); | |
bae7f79e | 113 | // Skip the first section, which is always empty. |
a2fb1b05 | 114 | p += This::shdr_size; |
bae7f79e ILT |
115 | for (unsigned int i = 1; i < shnum; ++i) |
116 | { | |
117 | elfcpp::Shdr<size, big_endian> shdr(p); | |
118 | if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB) | |
119 | { | |
120 | this->symtab_shnum_ = i; | |
121 | break; | |
122 | } | |
a2fb1b05 | 123 | p += This::shdr_size; |
bae7f79e ILT |
124 | } |
125 | } | |
126 | ||
127 | // Read the symbols and relocations from an object file. | |
128 | ||
129 | template<int size, bool big_endian> | |
130 | Read_symbols_data | |
131 | Sized_object<size, big_endian>::do_read_symbols() | |
132 | { | |
133 | if (this->symtab_shnum_ == 0) | |
134 | { | |
135 | // No symbol table. Weird but legal. | |
136 | Read_symbols_data ret; | |
137 | ret.symbols = NULL; | |
138 | ret.symbols_size = 0; | |
139 | ret.symbol_names = NULL; | |
140 | ret.symbol_names_size = 0; | |
141 | return ret; | |
142 | } | |
143 | ||
a2fb1b05 | 144 | const int shdr_size = This::shdr_size; |
bae7f79e ILT |
145 | |
146 | // Read the symbol table section header. | |
147 | off_t symtabshdroff = this->shoff_ + (this->symtab_shnum_ * shdr_size); | |
148 | const unsigned char* psymtabshdr = this->get_view(symtabshdroff, shdr_size); | |
149 | elfcpp::Shdr<size, big_endian> symtabshdr(psymtabshdr); | |
150 | assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); | |
151 | ||
14bfc3f5 | 152 | // We only need the external symbols. |
a2fb1b05 | 153 | const int sym_size = This::sym_size; |
14bfc3f5 ILT |
154 | off_t locsize = symtabshdr.get_sh_info() * sym_size; |
155 | off_t extoff = symtabshdr.get_sh_offset() + locsize; | |
156 | off_t extsize = symtabshdr.get_sh_size() - locsize; | |
157 | ||
bae7f79e | 158 | // Read the symbol table. |
14bfc3f5 | 159 | File_view* fvsymtab = this->get_lasting_view(extoff, extsize); |
bae7f79e ILT |
160 | |
161 | // Read the section header for the symbol names. | |
162 | unsigned int strtab_shnum = symtabshdr.get_sh_link(); | |
a2fb1b05 | 163 | if (strtab_shnum == 0 || strtab_shnum >= this->shnum()) |
bae7f79e ILT |
164 | { |
165 | fprintf(stderr, _("%s: %s: invalid symbol table name index: %u\n"), | |
166 | program_name, this->name().c_str(), strtab_shnum); | |
167 | gold_exit(false); | |
168 | } | |
169 | off_t strtabshdroff = this->shoff_ + (strtab_shnum * shdr_size); | |
170 | const unsigned char *pstrtabshdr = this->get_view(strtabshdroff, shdr_size); | |
171 | elfcpp::Shdr<size, big_endian> strtabshdr(pstrtabshdr); | |
172 | if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB) | |
173 | { | |
174 | fprintf(stderr, | |
175 | _("%s: %s: symbol table name section has wrong type: %u\n"), | |
176 | program_name, this->name().c_str(), | |
177 | static_cast<unsigned int>(strtabshdr.get_sh_type())); | |
178 | gold_exit(false); | |
179 | } | |
180 | ||
181 | // Read the symbol names. | |
182 | File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(), | |
183 | strtabshdr.get_sh_size()); | |
184 | ||
185 | Read_symbols_data ret; | |
186 | ret.symbols = fvsymtab; | |
14bfc3f5 | 187 | ret.symbols_size = extsize; |
bae7f79e ILT |
188 | ret.symbol_names = fvstrtab; |
189 | ret.symbol_names_size = strtabshdr.get_sh_size(); | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
194 | // Add the symbols to the symbol table. | |
195 | ||
196 | template<int size, bool big_endian> | |
197 | void | |
14bfc3f5 ILT |
198 | Sized_object<size, big_endian>::do_add_symbols(Symbol_table* symtab, |
199 | Read_symbols_data sd) | |
bae7f79e ILT |
200 | { |
201 | if (sd.symbols == NULL) | |
202 | { | |
203 | assert(sd.symbol_names == NULL); | |
204 | return; | |
205 | } | |
206 | ||
a2fb1b05 | 207 | const int sym_size = This::sym_size; |
14bfc3f5 ILT |
208 | size_t symcount = sd.symbols_size / sym_size; |
209 | if (symcount * sym_size != sd.symbols_size) | |
bae7f79e | 210 | { |
14bfc3f5 ILT |
211 | fprintf(stderr, |
212 | _("%s: %s: size of symbols is not multiple of symbol size\n"), | |
213 | program_name, this->name().c_str()); | |
214 | gold_exit(false); | |
bae7f79e | 215 | } |
14bfc3f5 ILT |
216 | |
217 | this->symbols_ = new Symbol*[symcount]; | |
218 | ||
219 | const elfcpp::Sym<size, big_endian>* syms = | |
220 | reinterpret_cast<const elfcpp::Sym<size, big_endian>*>(sd.symbols->data()); | |
221 | const char* sym_names = | |
222 | reinterpret_cast<const char*>(sd.symbol_names->data()); | |
223 | symtab->add_from_object(this, syms, symcount, sym_names, | |
224 | sd.symbol_names_size, this->symbols_); | |
a2fb1b05 ILT |
225 | |
226 | delete sd.symbols; | |
227 | delete sd.symbol_names; | |
228 | } | |
229 | ||
230 | // Return whether to include a section group in the link. LAYOUT is | |
231 | // used to keep track of which section groups we have already seen. | |
232 | // INDEX is the index of the section group and SHDR is the section | |
233 | // header. If we do not want to include this group, we set bits in | |
234 | // OMIT for each section which should be discarded. | |
235 | ||
236 | template<int size, bool big_endian> | |
237 | bool | |
238 | Sized_object<size, big_endian>::include_section_group( | |
239 | Layout* layout, | |
240 | unsigned int index, | |
241 | const elfcpp::Shdr<size, big_endian>& shdr, | |
242 | std::vector<bool>* omit) | |
243 | { | |
244 | // Read the section contents. | |
245 | const unsigned char* pcon = this->get_view(shdr.get_sh_offset(), | |
246 | shdr.get_sh_size()); | |
247 | const elfcpp::Elf_Word* pword = | |
248 | reinterpret_cast<const elfcpp::Elf_Word*>(pcon); | |
249 | ||
250 | // The first word contains flags. We only care about COMDAT section | |
251 | // groups. Other section groups are always included in the link | |
252 | // just like ordinary sections. | |
253 | elfcpp::Elf_Word flags = elfcpp::read_elf_word<big_endian>(pword); | |
254 | if ((flags & elfcpp::GRP_COMDAT) == 0) | |
255 | return true; | |
256 | ||
257 | // Look up the group signature, which is the name of a symbol. This | |
258 | // is a lot of effort to go to to read a string. Why didn't they | |
259 | // just use the name of the SHT_GROUP section as the group | |
260 | // signature? | |
261 | ||
262 | // Get the appropriate symbol table header (this will normally be | |
263 | // the single SHT_SYMTAB section, but in principle it need not be). | |
264 | if (shdr.get_sh_link() >= this->shnum()) | |
265 | { | |
266 | fprintf(stderr, _("%s: %s: section group %u link %u out of range\n"), | |
267 | program_name, this->name().c_str(), index, shdr.get_sh_link()); | |
268 | gold_exit(false); | |
269 | } | |
270 | off_t off = this->shoff_ + shdr.get_sh_link() * This::shdr_size; | |
271 | const unsigned char* psymshdr = this->get_view(off, This::shdr_size); | |
272 | elfcpp::Shdr<size, big_endian> symshdr(psymshdr); | |
273 | ||
274 | // Read the symbol table entry. | |
275 | if (shdr.get_sh_info() >= symshdr.get_sh_size() / This::sym_size) | |
276 | { | |
277 | fprintf(stderr, _("%s: %s: section group %u info %u out of range\n"), | |
278 | program_name, this->name().c_str(), index, shdr.get_sh_info()); | |
279 | gold_exit(false); | |
280 | } | |
281 | off_t symoff = symshdr.get_sh_offset() + shdr.get_sh_info() * This::sym_size; | |
282 | const unsigned char* psym = this->get_view(symoff, This::sym_size); | |
283 | elfcpp::Sym<size, big_endian> sym(psym); | |
284 | ||
285 | // Read the section header for the symbol table names. | |
286 | if (symshdr.get_sh_link() >= this->shnum()) | |
287 | { | |
288 | fprintf(stderr, _("%s; %s: symtab section %u link %u out of range\n"), | |
289 | program_name, this->name().c_str(), shdr.get_sh_link(), | |
290 | symshdr.get_sh_link()); | |
291 | gold_exit(false); | |
292 | } | |
293 | off_t symnameoff = this->shoff_ + symshdr.get_sh_link() * This::shdr_size; | |
294 | const unsigned char* psymnamehdr = this->get_view(symnameoff, | |
295 | This::shdr_size); | |
296 | elfcpp::Shdr<size, big_endian> symnamehdr(psymnamehdr); | |
297 | ||
298 | // Read the symbol table names. | |
299 | const unsigned char *psymnamesu = this->get_view(symnamehdr.get_sh_offset(), | |
300 | symnamehdr.get_sh_size()); | |
301 | const char* psymnames = reinterpret_cast<const char*>(psymnamesu); | |
302 | ||
303 | // Get the section group signature. | |
304 | if (sym.get_st_name() >= symnamehdr.get_sh_size()) | |
305 | { | |
306 | fprintf(stderr, _("%s: %s: symbol %u name offset %u out of range\n"), | |
307 | program_name, this->name().c_str(), shdr.get_sh_info(), | |
308 | sym.get_st_name()); | |
309 | gold_exit(false); | |
310 | } | |
311 | ||
312 | const char* signature = psymnames + sym.get_st_name(); | |
313 | ||
314 | // Record this section group, and see whether we've already seen one | |
315 | // with the same signature. | |
316 | if (layout->add_comdat(signature, true)) | |
317 | return true; | |
318 | ||
319 | // This is a duplicate. We want to discard the sections in this | |
320 | // group. | |
321 | size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word); | |
322 | for (size_t i = 1; i < count; ++i) | |
323 | { | |
324 | elfcpp::Elf_Word secnum = elfcpp::read_elf_word<big_endian>(pword + i); | |
325 | if (secnum >= this->shnum()) | |
326 | { | |
327 | fprintf(stderr, | |
328 | _("%s: %s: section %u in section group %u out of range"), | |
329 | program_name, this->name().c_str(), secnum, | |
330 | index); | |
331 | gold_exit(false); | |
332 | } | |
333 | (*omit)[secnum] = true; | |
334 | } | |
335 | ||
336 | return false; | |
337 | } | |
338 | ||
339 | // Whether to include a linkonce section in the link. NAME is the | |
340 | // name of the section and SHDR is the section header. | |
341 | ||
342 | // Linkonce sections are a GNU extension implemented in the original | |
343 | // GNU linker before section groups were defined. The semantics are | |
344 | // that we only include one linkonce section with a given name. The | |
345 | // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME, | |
346 | // where T is the type of section and SYMNAME is the name of a symbol. | |
347 | // In an attempt to make linkonce sections interact well with section | |
348 | // groups, we try to identify SYMNAME and use it like a section group | |
349 | // signature. We want to block section groups with that signature, | |
350 | // but not other linkonce sections with that signature. We also use | |
351 | // the full name of the linkonce section as a normal section group | |
352 | // signature. | |
353 | ||
354 | template<int size, bool big_endian> | |
355 | bool | |
356 | Sized_object<size, big_endian>::include_linkonce_section( | |
357 | Layout* layout, | |
358 | const char* name, | |
359 | const elfcpp::Shdr<size, big_endian>&) | |
360 | { | |
361 | const char* symname = strrchr(name, '.') + 1; | |
362 | bool omit1 = layout->add_comdat(symname, false); | |
363 | bool omit2 = layout->add_comdat(name, true); | |
364 | return omit1 || omit2; | |
365 | } | |
366 | ||
367 | // Lay out the input sections. We walk through the sections and check | |
368 | // whether they should be included in the link. If they should, we | |
369 | // pass them to the Layout object, which will return an output section | |
370 | // and an offset. | |
371 | ||
372 | template<int size, bool big_endian> | |
373 | void | |
374 | Sized_object<size, big_endian>::do_layout(Layout* layout) | |
375 | { | |
376 | // This is always called from the main thread. Lock the file to | |
377 | // keep the error checks happy. | |
378 | Task_locker_obj<File_read> frl(this->input_file()->file()); | |
379 | ||
380 | // Get the section headers. | |
381 | unsigned int shnum = this->shnum(); | |
382 | const unsigned char* pshdrs = this->get_view(this->shoff_, | |
383 | shnum * This::shdr_size); | |
384 | ||
385 | // Get the section names. | |
386 | const unsigned char* pshdrnames = pshdrs + this->shstrndx_ * This::shdr_size; | |
387 | elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames); | |
388 | typename elfcpp::Elf_types<size>::Elf_WXword names_size = | |
389 | shdrnames.get_sh_size(); | |
390 | const unsigned char* pnamesu = this->get_view(shdrnames.get_sh_offset(), | |
391 | shdrnames.get_sh_size()); | |
392 | const char* pnames = reinterpret_cast<const char*>(pnamesu); | |
393 | ||
394 | std::vector<Map_to_output>& map_sections(this->map_to_output()); | |
395 | map_sections.reserve(shnum); | |
396 | ||
397 | // Keep track of which sections to omit. | |
398 | std::vector<bool> omit(shnum, false); | |
399 | ||
400 | for (unsigned int i = 0; i < shnum; ++i) | |
401 | { | |
402 | elfcpp::Shdr<size, big_endian> shdr(pshdrs); | |
403 | ||
404 | if (shdr.get_sh_name() >= names_size) | |
405 | { | |
406 | fprintf(stderr, | |
407 | _("%s: %s: bad section name offset for section %u: %lu\n"), | |
408 | program_name, this->name().c_str(), i, | |
409 | static_cast<unsigned long>(shdr.get_sh_name())); | |
410 | gold_exit(false); | |
411 | } | |
412 | ||
413 | const char* name = pnames + shdr.get_sh_name(); | |
414 | ||
415 | bool discard = omit[i]; | |
416 | if (!discard) | |
417 | { | |
418 | if (shdr.get_sh_type() == elfcpp::SHT_GROUP) | |
419 | { | |
420 | if (!this->include_section_group(layout, i, shdr, &omit)) | |
421 | discard = true; | |
422 | } | |
423 | else if (Layout::is_linkonce(name)) | |
424 | { | |
425 | if (!this->include_linkonce_section(layout, name, shdr)) | |
426 | discard = true; | |
427 | } | |
428 | } | |
429 | ||
430 | if (discard) | |
431 | { | |
432 | // Do not include this section in the link. | |
433 | map_sections[i].output_section = NULL; | |
434 | continue; | |
435 | } | |
436 | ||
437 | off_t offset; | |
438 | Output_section* os = layout->layout(this, name, shdr, &offset); | |
439 | ||
440 | map_sections[i].output_section = os; | |
441 | map_sections[i].offset = offset; | |
442 | ||
443 | pshdrs += This::shdr_size; | |
444 | } | |
bae7f79e ILT |
445 | } |
446 | ||
447 | } // End namespace gold. | |
448 | ||
449 | namespace | |
450 | { | |
451 | ||
452 | using namespace gold; | |
453 | ||
454 | // Read an ELF file with the header and return the appropriate | |
455 | // instance of Object. | |
456 | ||
457 | template<int size, bool big_endian> | |
458 | Object* | |
459 | make_elf_sized_object(const std::string& name, Input_file* input_file, | |
460 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
461 | { | |
462 | int et = ehdr.get_e_type(); | |
463 | if (et != elfcpp::ET_REL && et != elfcpp::ET_DYN) | |
464 | { | |
465 | fprintf(stderr, "%s: %s: unsupported ELF type %d\n", | |
466 | program_name, name.c_str(), static_cast<int>(et)); | |
467 | gold_exit(false); | |
468 | } | |
469 | ||
470 | if (et == elfcpp::ET_REL) | |
471 | { | |
472 | Sized_object<size, big_endian>* obj = | |
473 | new Sized_object<size, big_endian>(name, input_file, offset, ehdr); | |
474 | obj->setup(ehdr); | |
475 | return obj; | |
476 | } | |
477 | else | |
478 | { | |
479 | // elfcpp::ET_DYN | |
480 | fprintf(stderr, _("%s: %s: dynamic objects are not yet supported\n"), | |
481 | program_name, name.c_str()); | |
482 | gold_exit(false); | |
483 | // Sized_dynobj<size, big_endian>* obj = | |
484 | // new Sized_dynobj<size, big_endian>(this->input_.name(), input_file, | |
485 | // offset, ehdr); | |
486 | // obj->setup(ehdr); | |
487 | // return obj; | |
488 | } | |
489 | } | |
490 | ||
491 | } // End anonymous namespace. | |
492 | ||
493 | namespace gold | |
494 | { | |
495 | ||
496 | // Read an ELF file and return the appropriate instance of Object. | |
497 | ||
498 | Object* | |
499 | make_elf_object(const std::string& name, Input_file* input_file, off_t offset, | |
500 | const unsigned char* p, off_t bytes) | |
501 | { | |
502 | if (bytes < elfcpp::EI_NIDENT) | |
503 | { | |
504 | fprintf(stderr, _("%s: %s: ELF file too short\n"), | |
505 | program_name, name.c_str()); | |
506 | gold_exit(false); | |
507 | } | |
508 | ||
509 | int v = p[elfcpp::EI_VERSION]; | |
510 | if (v != elfcpp::EV_CURRENT) | |
511 | { | |
512 | if (v == elfcpp::EV_NONE) | |
513 | fprintf(stderr, _("%s: %s: invalid ELF version 0\n"), | |
514 | program_name, name.c_str()); | |
515 | else | |
516 | fprintf(stderr, _("%s: %s: unsupported ELF version %d\n"), | |
517 | program_name, name.c_str(), v); | |
518 | gold_exit(false); | |
519 | } | |
520 | ||
521 | int c = p[elfcpp::EI_CLASS]; | |
522 | if (c == elfcpp::ELFCLASSNONE) | |
523 | { | |
524 | fprintf(stderr, _("%s: %s: invalid ELF class 0\n"), | |
525 | program_name, name.c_str()); | |
526 | gold_exit(false); | |
527 | } | |
528 | else if (c != elfcpp::ELFCLASS32 | |
529 | && c != elfcpp::ELFCLASS64) | |
530 | { | |
531 | fprintf(stderr, _("%s: %s: unsupported ELF class %d\n"), | |
532 | program_name, name.c_str(), c); | |
533 | gold_exit(false); | |
534 | } | |
535 | ||
536 | int d = p[elfcpp::EI_DATA]; | |
537 | if (d == elfcpp::ELFDATANONE) | |
538 | { | |
539 | fprintf(stderr, _("%s: %s: invalid ELF data encoding\n"), | |
540 | program_name, name.c_str()); | |
541 | gold_exit(false); | |
542 | } | |
543 | else if (d != elfcpp::ELFDATA2LSB | |
544 | && d != elfcpp::ELFDATA2MSB) | |
545 | { | |
546 | fprintf(stderr, _("%s: %s: unsupported ELF data encoding %d\n"), | |
547 | program_name, name.c_str(), d); | |
548 | gold_exit(false); | |
549 | } | |
550 | ||
551 | bool big_endian = d == elfcpp::ELFDATA2MSB; | |
552 | ||
553 | if (c == elfcpp::ELFCLASS32) | |
554 | { | |
555 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
556 | { | |
557 | fprintf(stderr, _("%s: %s: ELF file too short\n"), | |
558 | program_name, name.c_str()); | |
559 | gold_exit(false); | |
560 | } | |
561 | if (big_endian) | |
562 | { | |
563 | elfcpp::Ehdr<32, true> ehdr(p); | |
564 | return make_elf_sized_object<32, true>(name, input_file, | |
565 | offset, ehdr); | |
566 | } | |
567 | else | |
568 | { | |
569 | elfcpp::Ehdr<32, false> ehdr(p); | |
570 | return make_elf_sized_object<32, false>(name, input_file, | |
571 | offset, ehdr); | |
572 | } | |
573 | } | |
574 | else | |
575 | { | |
576 | if (bytes < elfcpp::Elf_sizes<32>::ehdr_size) | |
577 | { | |
578 | fprintf(stderr, _("%s: %s: ELF file too short\n"), | |
579 | program_name, name.c_str()); | |
580 | gold_exit(false); | |
581 | } | |
582 | if (big_endian) | |
583 | { | |
584 | elfcpp::Ehdr<64, true> ehdr(p); | |
585 | return make_elf_sized_object<64, true>(name, input_file, | |
586 | offset, ehdr); | |
587 | } | |
588 | else | |
589 | { | |
590 | elfcpp::Ehdr<64, false> ehdr(p); | |
591 | return make_elf_sized_object<64, false>(name, input_file, | |
592 | offset, ehdr); | |
593 | } | |
594 | } | |
595 | } | |
596 | ||
597 | // Instantiate the templates we need. We could use the configure | |
598 | // script to restrict this to only the ones for implemented targets. | |
599 | ||
600 | template | |
601 | class Sized_object<32, false>; | |
602 | ||
603 | template | |
604 | class Sized_object<32, true>; | |
605 | ||
606 | template | |
607 | class Sized_object<64, false>; | |
608 | ||
609 | template | |
610 | class Sized_object<64, true>; | |
611 | ||
612 | } // End namespace gold. |