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| 1 // mips.cc -- mips target support for gold. |
| 2 |
| 3 // Copyright 2011 Free Software Foundation, Inc. |
| 4 // Written by Aleksandar Simeonov <aleksandar.simeonov@rt-rk.com> |
| 5 // based on the i386 code by Ian Lance Taylor <iant@google.com>. |
| 6 // This file also contains borrowed and adapted code from |
| 7 // bfd/elf32-mips.c. |
| 8 |
| 9 // This file is part of gold. |
| 10 |
| 11 // This program is free software; you can redistribute it and/or modify |
| 12 // it under the terms of the GNU General Public License as published by |
| 13 // the Free Software Foundation; either version 3 of the License, or |
| 14 // (at your option) any later version. |
| 15 |
| 16 // This program is distributed in the hope that it will be useful, |
| 17 // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 // GNU General Public License for more details. |
| 20 |
| 21 // You should have received a copy of the GNU General Public License |
| 22 // along with this program; if not, write to the Free Software |
| 23 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 24 // MA 02110-1301, USA. |
| 25 |
| 26 #include <set> |
| 27 #include <sstream> |
| 28 |
| 29 #include "gold.h" |
| 30 |
| 31 #include "elfcpp.h" |
| 32 #include "parameters.h" |
| 33 #include "reloc.h" |
| 34 #include "mips.h" |
| 35 #include "object.h" |
| 36 #include "symtab.h" |
| 37 #include "layout.h" |
| 38 #include "output.h" |
| 39 #include "copy-relocs.h" |
| 40 #include "target.h" |
| 41 #include "target-reloc.h" |
| 42 #include "target-select.h" |
| 43 #include "tls.h" |
| 44 #include "errors.h" |
| 45 #include "gc.h" |
| 46 |
| 47 namespace |
| 48 { |
| 49 using namespace gold; |
| 50 |
| 51 template<int size, bool big_endian> |
| 52 class Mips_output_data_plt; |
| 53 |
| 54 template<int size, bool big_endian> |
| 55 class Mips_output_data_got; |
| 56 |
| 57 template<int size, bool big_endian> |
| 58 class Target_mips; |
| 59 |
| 60 template<int size> |
| 61 class Mips_output_section_reginfo; |
| 62 |
| 63 template<int size, bool big_endian> |
| 64 class Mips_output_data_stub; |
| 65 |
| 66 template<int size, bool big_endian> |
| 67 class Mips_output_data_mips_stubs; |
| 68 |
| 69 // Mips_output_data_got class. We derive this from Output_data_got to add |
| 70 // extra methods to handle TLS relocations. |
| 71 |
| 72 template<int size, bool big_endian> |
| 73 class Mips_output_data_got : public Output_data_got<size, big_endian> |
| 74 { |
| 75 public: |
| 76 typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> |
| 77 Reloc_section; |
| 78 |
| 79 Mips_output_data_got(Symbol_table* symtab, Layout* layout) |
| 80 : Output_data_got<size, big_endian>(), symbol_table_(symtab), |
| 81 layout_(layout), tls_entries_(0), tls_entries_set_(false) |
| 82 { |
| 83 // According to MIPS O32 ABI zero entry of GOT is reserved. |
| 84 this->add_constant(0); |
| 85 // Module pointer (GNU extension) |
| 86 this->add_constant(0x80000000); |
| 87 } |
| 88 |
| 89 // Add a static entry for the GOT entry at OFFSET. GSYM is a global |
| 90 // symbol and R_TYPE is the code of a dynamic relocation that needs to be |
| 91 // applied in a static link. |
| 92 void |
| 93 add_static_reloc(unsigned int got_offset, unsigned int r_type, Symbol* gsym) |
| 94 { this->static_relocs_.push_back(Static_reloc(got_offset, r_type, gsym)); } |
| 95 |
| 96 // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object |
| 97 // defining a local symbol with INDEX. R_TYPE is the code of a dynamic |
| 98 // relocation that needs to be applied in a static link. |
| 99 void |
| 100 add_static_reloc(unsigned int got_offset, unsigned int r_type, |
| 101 Sized_relobj_file<size, big_endian>* relobj, |
| 102 unsigned int index) |
| 103 { |
| 104 this->static_relocs_.push_back(Static_reloc(got_offset, r_type, relobj, |
| 105 index)); |
| 106 } |
| 107 |
| 108 void |
| 109 add_tls_gd_with_static_reloc(unsigned int got_type, Symbol* gsym); |
| 110 |
| 111 // Same as the above but for a local symbol in OBJECT with INDEX. |
| 112 void |
| 113 add_tls_gd_local_reloc(unsigned int got_type, |
| 114 Sized_relobj_file<size, big_endian>* object, |
| 115 unsigned int index); |
| 116 |
| 117 void |
| 118 add_got16_view(std::string key, Mips_output_data_got<size, big_endian>* got) |
| 119 |
| 120 { |
| 121 if (got16_views_.count(key) == 0) |
| 122 got16_views_[key] = got->add_constant(0); |
| 123 } |
| 124 |
| 125 unsigned int |
| 126 got16_offset(std::string key) |
| 127 { |
| 128 if (got16_views_.count(key) == 0) |
| 129 gold_error("internal error in GOT16 relocation"); |
| 130 |
| 131 return got16_views_[key]; |
| 132 } |
| 133 |
| 134 unsigned char* |
| 135 got_view() |
| 136 { return this->got_view_; } |
| 137 |
| 138 Symbol_table* |
| 139 symbol_table() |
| 140 { return this->symbol_table_; } |
| 141 |
| 142 Layout* |
| 143 layout() |
| 144 { return this->layout_; } |
| 145 |
| 146 void |
| 147 add_global_with_reloc_mips(Symbol* gsym) |
| 148 { |
| 149 this->global_relocs_.push(gsym); |
| 150 } |
| 151 |
| 152 void |
| 153 add_global_tls_with_reloc_mips(Symbol* gsym, Reloc_section* rel_dyn, |
| 154 unsigned int r_type) |
| 155 { |
| 156 this->tls_relocs_.push(Tls_reloc(gsym, rel_dyn, r_type)); |
| 157 } |
| 158 |
| 159 void |
| 160 add_global_relocs() |
| 161 { |
| 162 while (!this->global_relocs_.empty()) |
| 163 { |
| 164 Symbol *gsym = this->global_relocs_.front(); |
| 165 |
| 166 this->add_global(gsym, 0); |
| 167 gsym->set_needs_dynsym_entry(); |
| 168 this->global_relocs_.pop(); |
| 169 } |
| 170 } |
| 171 |
| 172 void |
| 173 add_global_tls_relocs() |
| 174 { |
| 175 while (!this->tls_relocs_.empty()) |
| 176 { |
| 177 Tls_reloc tls_rel = this->tls_relocs_.front(); |
| 178 Symbol *gsym = tls_rel.symbol(); |
| 179 |
| 180 if (!gsym->has_got_offset(1)) |
| 181 { |
| 182 unsigned int r_type = tls_rel.r_type(); |
| 183 Reloc_section* rel_dyn = tls_rel.rel_dyn(); |
| 184 |
| 185 this->tls_entries_++; |
| 186 |
| 187 if (parameters->options().output_is_position_independent()) |
| 188 { |
| 189 this->add_global(gsym, 1); |
| 190 rel_dyn->add_absolute(r_type, this, gsym->got_offset(1)); |
| 191 } |
| 192 else |
| 193 { |
| 194 this->add_global_with_rel(gsym, 1, rel_dyn, r_type); |
| 195 } |
| 196 |
| 197 gsym->set_needs_dynsym_entry(); |
| 198 } |
| 199 |
| 200 this->tls_relocs_.pop(); |
| 201 } |
| 202 |
| 203 this->tls_entries_set_ = true; |
| 204 } |
| 205 |
| 206 unsigned int |
| 207 tls_entries() |
| 208 { |
| 209 if (this->tls_entries_set_) |
| 210 return this->tls_entries_; |
| 211 |
| 212 return 0; |
| 213 } |
| 214 protected: |
| 215 // Write out the GOT table. |
| 216 void |
| 217 do_write(Output_file*); |
| 218 |
| 219 private: |
| 220 class Tls_reloc |
| 221 { |
| 222 public: |
| 223 Tls_reloc(Symbol* gsym, Reloc_section* rel_dyn, unsigned int r_type) |
| 224 : symbol_(gsym), rel_dyn_(rel_dyn), r_type_(r_type) |
| 225 { } |
| 226 |
| 227 Symbol* |
| 228 symbol() |
| 229 { return this->symbol_; } |
| 230 |
| 231 Reloc_section* |
| 232 rel_dyn() |
| 233 { return this->rel_dyn_; } |
| 234 |
| 235 unsigned int |
| 236 r_type() |
| 237 { return this->r_type_; } |
| 238 |
| 239 private: |
| 240 Symbol* symbol_; |
| 241 Reloc_section* rel_dyn_; |
| 242 unsigned int r_type_; |
| 243 }; |
| 244 |
| 245 // This class represent dynamic relocations that need to be applied by |
| 246 // gold because we are using TLS relocations in a static link. |
| 247 class Static_reloc |
| 248 { |
| 249 public: |
| 250 Static_reloc(unsigned int got_offset, unsigned int r_type, Symbol* gsym) |
| 251 : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(true) |
| 252 { this->u_.global.symbol = gsym; } |
| 253 |
| 254 Static_reloc(unsigned int got_offset, unsigned int r_type, |
| 255 Sized_relobj_file<size, big_endian>* relobj, unsigned int index) |
| 256 : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(false) |
| 257 { |
| 258 this->u_.local.relobj = relobj; |
| 259 this->u_.local.index = index; |
| 260 } |
| 261 |
| 262 // Return the GOT offset. |
| 263 unsigned int |
| 264 got_offset() const |
| 265 { return this->got_offset_; } |
| 266 |
| 267 // Relocation type. |
| 268 unsigned int |
| 269 r_type() const |
| 270 { return this->r_type_; } |
| 271 |
| 272 // Whether the symbol is global or not. |
| 273 bool |
| 274 symbol_is_global() const |
| 275 { return this->symbol_is_global_; } |
| 276 |
| 277 // For a relocation against a global symbol, the global symbol. |
| 278 Symbol* |
| 279 symbol() const |
| 280 { |
| 281 gold_assert(this->symbol_is_global_); |
| 282 return this->u_.global.symbol; |
| 283 } |
| 284 |
| 285 // For a relocation against a local symbol, the defining object. |
| 286 Sized_relobj_file<size, big_endian>* |
| 287 relobj() const |
| 288 { |
| 289 gold_assert(!this->symbol_is_global_); |
| 290 return this->u_.local.relobj; |
| 291 } |
| 292 |
| 293 // For a relocation against a local symbol, the local symbol index. |
| 294 unsigned int |
| 295 index() const |
| 296 { |
| 297 gold_assert(!this->symbol_is_global_); |
| 298 return this->u_.local.index; |
| 299 } |
| 300 |
| 301 private: |
| 302 // GOT offset of the entry to which this relocation is applied. |
| 303 unsigned int got_offset_; |
| 304 // Type of relocation. |
| 305 unsigned int r_type_; |
| 306 // Whether this relocation is against a global symbol. |
| 307 bool symbol_is_global_; |
| 308 // A global or local symbol. |
| 309 union |
| 310 { |
| 311 struct |
| 312 { |
| 313 // For a global symbol, the symbol itself. |
| 314 Symbol* symbol; |
| 315 } global; |
| 316 struct |
| 317 { |
| 318 // For a local symbol, the object defining object. |
| 319 Sized_relobj_file<size, big_endian>* relobj; |
| 320 // For a local symbol, the symbol index. |
| 321 unsigned int index; |
| 322 } local; |
| 323 } u_; |
| 324 }; |
| 325 |
| 326 // Symbol table of the output object. |
| 327 Symbol_table* symbol_table_; |
| 328 // Layout of the output object. |
| 329 Layout* layout_; |
| 330 // Static relocs to be applied to the GOT. |
| 331 std::vector<Static_reloc> static_relocs_; |
| 332 // Got16 relocs that are related to the GOT |
| 333 std::map<std::string, unsigned int> got16_views_; |
| 334 // .got section view |
| 335 unsigned char* got_view_; |
| 336 // List of global relocs that should be at the end of .got section |
| 337 std::queue<Symbol *> global_relocs_; |
| 338 // List of global tls relocs that should be at the end of .got section |
| 339 std::queue<Tls_reloc> tls_relocs_; |
| 340 // Number of TLS entries |
| 341 unsigned int tls_entries_; |
| 342 // Is number of TLS entries set |
| 343 bool tls_entries_set_; |
| 344 }; |
| 345 |
| 346 // Mips reginfo output section class |
| 347 |
| 348 template<int size> |
| 349 class Mips_output_section_reginfo : public Output_section |
| 350 { |
| 351 public: |
| 352 Mips_output_section_reginfo (const char *name, elfcpp::Elf_Word type, |
| 353 elfcpp::Elf_Xword flags):Output_section (name, type, flags) |
| 354 { |
| 355 this->set_always_keeps_input_sections(); |
| 356 |
| 357 gp_ = NULL; |
| 358 |
| 359 for (size_t i = 0; i < 24; i++) |
| 360 data_[i] = 0; |
| 361 } |
| 362 |
| 363 ~Mips_output_section_reginfo() |
| 364 { }; |
| 365 |
| 366 void |
| 367 set_gp(Sized_symbol<size> *gp) |
| 368 { this->gp_ = gp; } |
| 369 |
| 370 // Downcast a base pointer to an Mips_output_section_reginfo pointer. |
| 371 static Mips_output_section_reginfo<size>* |
| 372 as_mips_output_section_reginfo(Output_section* os) |
| 373 { return static_cast<Mips_output_section_reginfo<size>*>(os); } |
| 374 |
| 375 protected: |
| 376 // Set the final data size. |
| 377 void set_final_data_size(); |
| 378 |
| 379 // Write reginfo section into file OF. |
| 380 void do_write (Output_file * of); |
| 381 |
| 382 private: |
| 383 // Data. |
| 384 unsigned char data_[24]; |
| 385 |
| 386 // _gp symbol |
| 387 Sized_symbol<size>* gp_; |
| 388 }; |
| 389 |
| 390 // The MIPS target has many relocation types with odd-sizes or noncontiguous |
| 391 // bits. The default handling of relocatable relocation cannot process these |
| 392 // relocations. So we have to extend the default code. |
| 393 |
| 394 template<bool big_endian, int sh_type, typename Classify_reloc> |
| 395 class Mips_scan_relocatable_relocs : |
| 396 public Default_scan_relocatable_relocs<sh_type, Classify_reloc> |
| 397 { |
| 398 public: |
| 399 // Return the strategy to use for a local symbol which is a section |
| 400 // symbol, given the relocation type. |
| 401 inline Relocatable_relocs::Reloc_strategy |
| 402 local_section_strategy(unsigned int r_type, Relobj *object) |
| 403 { |
| 404 switch (r_type) |
| 405 { |
| 406 case elfcpp::R_MIPS_26: |
| 407 return Relocatable_relocs::RELOC_SPECIAL; |
| 408 |
| 409 default: |
| 410 return Default_scan_relocatable_relocs<sh_type, Classify_reloc>::local
_section_strategy(r_type, object); |
| 411 } |
| 412 } |
| 413 }; |
| 414 |
| 415 template<int size, bool big_endian> |
| 416 class Target_mips : public Sized_target<size, big_endian> |
| 417 { |
| 418 public: |
| 419 typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> |
| 420 Reloc_section; |
| 421 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
| 422 Reloca_section; |
| 423 typedef Unordered_map<const char*, Symbol*> Stub_symbol_info; |
| 424 |
| 425 Target_mips() |
| 426 : Sized_target<size, big_endian>(&mips_info), |
| 427 got_(NULL), plt_(NULL), got_plt_(NULL), |
| 428 rel_dyn_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_MIPS_COPY), |
| 429 copy_relocsa_(elfcpp::R_MIPS_COPY), got_mod_index_offset_(-1U), |
| 430 gp_(NULL), stub_(NULL), stub_flag_(false), |
| 431 processor_specific_flags_(0), mips_stubs_(NULL), text_section_(NULL), |
| 432 layout_(NULL), symtab_(NULL) |
| 433 { |
| 434 add_extension(elfcpp::E_MIPS_ARCH_64R2, elfcpp::E_MIPS_MACH_OCTEON); |
| 435 add_extension(elfcpp::E_MIPS_ARCH_64, elfcpp::E_MIPS_ARCH_64R2); |
| 436 add_extension(elfcpp::E_MIPS_ARCH_64, elfcpp::E_MIPS_ARCH_64 |
| 437 | elfcpp::E_MIPS_MACH_SB1); |
| 438 add_extension(elfcpp::E_MIPS_ARCH_64, elfcpp::E_MIPS_ARCH_64 |
| 439 | elfcpp::E_MIPS_MACH_XLR); |
| 440 add_extension(elfcpp::E_MIPS_ARCH_64, elfcpp::E_MIPS_ARCH_64 |
| 441 | elfcpp::E_MIPS_MACH_LS3A); |
| 442 add_extension(elfcpp::E_MIPS_ARCH_5, elfcpp::E_MIPS_ARCH_64); |
| 443 add_extension(elfcpp::E_MIPS_ARCH_4 | elfcpp::E_MIPS_MACH_5400, |
| 444 elfcpp::E_MIPS_ARCH_4 | elfcpp::E_MIPS_MACH_5500); |
| 445 add_extension(elfcpp::E_MIPS_ARCH_4, elfcpp::E_MIPS_ARCH_4 |
| 446 | elfcpp::E_MIPS_MACH_5400); |
| 447 add_extension(elfcpp::E_MIPS_ARCH_4, elfcpp::E_MIPS_ARCH_5); |
| 448 add_extension(elfcpp::E_MIPS_ARCH_4, elfcpp::E_MIPS_ARCH_4 |
| 449 | elfcpp::E_MIPS_MACH_9000); |
| 450 add_extension(elfcpp::E_MIPS_ARCH_3 | elfcpp::E_MIPS_MACH_4100, |
| 451 elfcpp::E_MIPS_ARCH_3 | elfcpp::E_MIPS_MACH_4120); |
| 452 add_extension(elfcpp::E_MIPS_ARCH_3 | elfcpp::E_MIPS_MACH_4100, |
| 453 elfcpp::E_MIPS_ARCH_3 | elfcpp::E_MIPS_MACH_4111); |
| 454 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 455 | elfcpp::E_MIPS_MACH_LS2F); |
| 456 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 457 | elfcpp::E_MIPS_MACH_LS2F); |
| 458 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_4); |
| 459 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 460 | elfcpp::E_MIPS_MACH_4650); |
| 461 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 462 | elfcpp::E_MIPS_MACH_4100); |
| 463 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 464 | elfcpp::E_MIPS_MACH_4111); |
| 465 add_extension(elfcpp::E_MIPS_ARCH_32, elfcpp::E_MIPS_ARCH_32R2); |
| 466 add_extension(elfcpp::E_MIPS_ARCH_2, elfcpp::E_MIPS_ARCH_3); |
| 467 add_extension(elfcpp::E_MIPS_ARCH_2, elfcpp::E_MIPS_ARCH_32); |
| 468 add_extension(elfcpp::E_MIPS_ARCH_1, elfcpp::E_MIPS_ARCH_2); |
| 469 add_extension(elfcpp::E_MIPS_ARCH_1, elfcpp::E_MIPS_ARCH_1 |
| 470 | elfcpp::E_MIPS_MACH_3900); |
| 471 } |
| 472 |
| 473 // Process the relocations to determine unreferenced sections for |
| 474 // garbage collection. |
| 475 void |
| 476 gc_process_relocs(Symbol_table* symtab, |
| 477 Layout* layout, |
| 478 Sized_relobj_file<size, big_endian>* object, |
| 479 unsigned int data_shndx, |
| 480 unsigned int sh_type, |
| 481 const unsigned char* prelocs, |
| 482 size_t reloc_count, |
| 483 Output_section* output_section, |
| 484 bool needs_special_offset_handling, |
| 485 size_t local_symbol_count, |
| 486 const unsigned char* plocal_symbols); |
| 487 |
| 488 // Scan the relocations to look for symbol adjustments. |
| 489 void |
| 490 scan_relocs(Symbol_table* symtab, |
| 491 Layout* layout, |
| 492 Sized_relobj_file<size, big_endian>* object, |
| 493 unsigned int data_shndx, |
| 494 unsigned int sh_type, |
| 495 const unsigned char* prelocs, |
| 496 size_t reloc_count, |
| 497 Output_section* output_section, |
| 498 bool needs_special_offset_handling, |
| 499 size_t local_symbol_count, |
| 500 const unsigned char* plocal_symbols); |
| 501 |
| 502 // Finalize the sections. |
| 503 void |
| 504 do_finalize_sections (Layout *, const Input_objects *, Symbol_table *); |
| 505 |
| 506 // Fix values that are known only after sections are finalized. |
| 507 void |
| 508 do_fix_sections(Layout*, Symbol_table*); |
| 509 |
| 510 // Relocate a section. |
| 511 void |
| 512 relocate_section(const Relocate_info<size, big_endian>*, |
| 513 unsigned int sh_type, |
| 514 const unsigned char* prelocs, |
| 515 size_t reloc_count, |
| 516 Output_section* output_section, |
| 517 bool needs_special_offset_handling, |
| 518 unsigned char* view, |
| 519 typename elfcpp::Elf_types<size>::Elf_Addr view_address, |
| 520 section_size_type view_size, |
| 521 const Reloc_symbol_changes*); |
| 522 |
| 523 // Scan the relocs during a relocatable link. |
| 524 void |
| 525 scan_relocatable_relocs(Symbol_table* symtab, |
| 526 Layout* layout, |
| 527 Sized_relobj_file<size, big_endian>* object, |
| 528 unsigned int data_shndx, |
| 529 unsigned int sh_type, |
| 530 const unsigned char* prelocs, |
| 531 size_t reloc_count, |
| 532 Output_section* output_section, |
| 533 bool needs_special_offset_handling, |
| 534 size_t local_symbol_count, |
| 535 const unsigned char* plocal_symbols, |
| 536 Relocatable_relocs*); |
| 537 |
| 538 // Relocate a section during a relocatable link. |
| 539 void |
| 540 relocate_for_relocatable(const Relocate_info<size, big_endian>*, |
| 541 unsigned int sh_type, |
| 542 const unsigned char* prelocs, |
| 543 size_t reloc_count, |
| 544 Output_section* output_section, |
| 545 off_t offset_in_output_section, |
| 546 const Relocatable_relocs*, |
| 547 unsigned char* view, |
| 548 typename elfcpp::Elf_types<size>::Elf_Addr view_addre
ss, |
| 549 section_size_type view_size, |
| 550 unsigned char* reloc_view, |
| 551 section_size_type reloc_view_size); |
| 552 |
| 553 // Perform target-specific processing in a relocatable link. This is |
| 554 // only used if we use the relocation strategy RELOC_SPECIAL. |
| 555 void |
| 556 relocate_special_relocatable(const Relocate_info<size, big_endian>* relinfo, |
| 557 unsigned int sh_type, |
| 558 const unsigned char* preloc_in, |
| 559 size_t relnum, |
| 560 Output_section* output_section, |
| 561 off_t offset_in_output_section, |
| 562 unsigned char* view, |
| 563 typename elfcpp::Elf_types<32>::Elf_Addr |
| 564 view_address, |
| 565 section_size_type view_size, |
| 566 unsigned char* preloc_out); |
| 567 |
| 568 // Return whether SYM is defined by the ABI. |
| 569 bool |
| 570 do_is_defined_by_abi(const Symbol* sym) const |
| 571 { |
| 572 return ((strcmp(sym->name(), "__gnu_local_gp") == 0) |
| 573 || (strcmp(sym->name(), "_gp_disp") == 0) |
| 574 || (strcmp(sym->name(), "___tls_get_addr") == 0)); |
| 575 } |
| 576 |
| 577 // Return the number of entries in the GOT. |
| 578 unsigned int |
| 579 got_entry_count() const |
| 580 { |
| 581 if (!this->has_got_section()) |
| 582 return 0; |
| 583 return this->got_size() / 4; |
| 584 } |
| 585 |
| 586 // Return the number of entries in the PLT. |
| 587 unsigned int |
| 588 plt_entry_count() const |
| 589 { |
| 590 if (this->plt_ == NULL) |
| 591 return 0; |
| 592 return this->plt_->entry_count(); |
| 593 } |
| 594 |
| 595 // Return the offset of the first non-reserved PLT entry. |
| 596 unsigned int |
| 597 first_plt_entry_offset() const |
| 598 { return Mips_output_data_plt<size, big_endian>::first_plt_entry_offset(); } |
| 599 |
| 600 // Return the size of each PLT entry. |
| 601 unsigned int |
| 602 plt_entry_size() const |
| 603 { return Mips_output_data_plt<size, big_endian>::plt_entry_size(); } |
| 604 |
| 605 // Get stub section |
| 606 Mips_output_data_stub<size, big_endian>* |
| 607 stub() |
| 608 { return this->stub_; } |
| 609 |
| 610 // Add stub symbol to map |
| 611 void |
| 612 add_stub_symbol(const char* name, Symbol *gsym) |
| 613 { this->stub_symbol_[name] = gsym; } |
| 614 |
| 615 // Get stub symbol from map |
| 616 Symbol* |
| 617 stub_symbol(const char* name) |
| 618 { return this->stub_symbol_[name]; } |
| 619 |
| 620 // Check if symbol is in .plt section |
| 621 bool |
| 622 is_plt_symbol(Sized_symbol<size> *sym) |
| 623 { |
| 624 if (this->mips_stubs_ == NULL) |
| 625 return true; |
| 626 |
| 627 return this->mips_stubs_->is_plt_symbol(sym); |
| 628 } |
| 629 |
| 630 // Return .MIPS.stubs output section. |
| 631 Mips_output_data_mips_stubs<size, big_endian> * |
| 632 mips_stubs() const |
| 633 { return this->mips_stubs_; } |
| 634 |
| 635 // Retrun address of .text section |
| 636 uint64_t |
| 637 text_section_address() const |
| 638 { |
| 639 if (this->text_section_ == 0) |
| 640 return 0; |
| 641 |
| 642 return this->text_section_->address(); |
| 643 } |
| 644 |
| 645 protected: |
| 646 // Return the value to use for a dynamic symbol which requires special |
| 647 // treatment. This is how we support equality comparisons of function |
| 648 // pointers across shared library boundaries, as described in the |
| 649 // processor specific ABI supplement. |
| 650 uint64_t |
| 651 do_dynsym_value(const Symbol* gsym) const; |
| 652 |
| 653 // Make an output section. |
| 654 Output_section* |
| 655 do_make_output_section (const char *name, elfcpp::Elf_Word type, |
| 656 elfcpp::Elf_Xword flags) |
| 657 { |
| 658 if (type == elfcpp::SHT_MIPS_REGINFO) |
| 659 return new Mips_output_section_reginfo<size>(name, type, flags); |
| 660 else |
| 661 return new Output_section(name, type, flags); |
| 662 } |
| 663 |
| 664 void |
| 665 do_adjust_elf_header(unsigned char* view, int len) const; |
| 666 |
| 667 // MIPS specific dynamic tags. |
| 668 unsigned int |
| 669 do_dynamic_tag_value(elfcpp::DT) const; |
| 670 |
| 671 private: |
| 672 // The class which scans relocations. |
| 673 class Scan |
| 674 { |
| 675 public: |
| 676 Scan() |
| 677 : issued_non_pic_error_(false) |
| 678 { } |
| 679 |
| 680 static inline int |
| 681 get_reference_flags(unsigned int r_type); |
| 682 |
| 683 inline void |
| 684 local(Symbol_table* symtab, Layout* layout, Target_mips* target, |
| 685 Sized_relobj_file<size, big_endian>* object, |
| 686 unsigned int data_shndx, |
| 687 Output_section* output_section, |
| 688 const elfcpp::Rel<size, big_endian>& reloc, unsigned int r_type, |
| 689 const elfcpp::Sym<size, big_endian>& lsym); |
| 690 |
| 691 inline void |
| 692 local(Symbol_table* symtab, Layout* layout, Target_mips* target, |
| 693 Sized_relobj_file<size, big_endian>* object, |
| 694 unsigned int data_shndx, |
| 695 Output_section* output_section, |
| 696 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, |
| 697 const elfcpp::Sym<size, big_endian>& lsym); |
| 698 |
| 699 inline void |
| 700 local(Symbol_table* symtab, Layout* layout, Target_mips* target, |
| 701 Sized_relobj_file<size, big_endian>* object, |
| 702 unsigned int data_shndx, |
| 703 Output_section* output_section, |
| 704 const elfcpp::Rela<size, big_endian>* rela, |
| 705 const elfcpp::Rel<size, big_endian>* rel, |
| 706 unsigned int rel_type, |
| 707 unsigned int r_type, |
| 708 const elfcpp::Sym<size, big_endian>& lsym); |
| 709 |
| 710 inline void |
| 711 global(Symbol_table* symtab, Layout* layout, Target_mips* target, |
| 712 Sized_relobj_file<size, big_endian>* object, |
| 713 unsigned int data_shndx, |
| 714 Output_section* output_section, |
| 715 const elfcpp::Rel<size, big_endian>& reloc, unsigned int r_type, |
| 716 Symbol* gsym); |
| 717 |
| 718 inline void |
| 719 global(Symbol_table* symtab, Layout* layout, Target_mips* target, |
| 720 Sized_relobj_file<size, big_endian>* object, |
| 721 unsigned int data_shndx, |
| 722 Output_section* output_section, |
| 723 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, |
| 724 Symbol* gsym); |
| 725 |
| 726 inline void |
| 727 global(Symbol_table* symtab, Layout* layout, Target_mips* target, |
| 728 Sized_relobj_file<size, big_endian>* object, |
| 729 unsigned int data_shndx, |
| 730 Output_section* output_section, |
| 731 const elfcpp::Rela<size, big_endian>* rela, |
| 732 const elfcpp::Rel<size, big_endian>* rel, |
| 733 unsigned int rel_type, |
| 734 unsigned int r_type, |
| 735 Symbol* gsym); |
| 736 |
| 737 inline bool |
| 738 local_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 739 Target_mips* , |
| 740 Sized_relobj_file<size, big_endian>* , |
| 741 unsigned int , |
| 742 Output_section* , |
| 743 const elfcpp::Rel<size, big_endian>& , |
| 744 unsigned int , |
| 745 const elfcpp::Sym<size, big_endian>&) |
| 746 { return false; } |
| 747 |
| 748 inline bool |
| 749 global_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 750 Target_mips* , |
| 751 Sized_relobj_file<size, big_endian>* , |
| 752 unsigned int , |
| 753 Output_section* , |
| 754 const elfcpp::Rel<size, big_endian>& , |
| 755 unsigned int , Symbol*) |
| 756 { return false; } |
| 757 |
| 758 inline bool |
| 759 local_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 760 Target_mips* , |
| 761 Sized_relobj_file<size, big_endian>* , |
| 762 unsigned int , |
| 763 Output_section* , |
| 764 const elfcpp::Rela<size, big_endian>& , |
| 765 unsigned int , |
| 766 const elfcpp::Sym<size, big_endian>&) |
| 767 { return false; } |
| 768 |
| 769 inline bool |
| 770 global_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 771 Target_mips* , |
| 772 Sized_relobj_file<size, big_endian>* , |
| 773 unsigned int , |
| 774 Output_section* , |
| 775 const elfcpp::Rela<size, big_endian>& , |
| 776 unsigned int , Symbol*) |
| 777 { return false; } |
| 778 private: |
| 779 static void |
| 780 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
| 781 unsigned int r_type); |
| 782 |
| 783 static void |
| 784 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
| 785 unsigned int r_type, Symbol*); |
| 786 |
| 787 static void |
| 788 generate_tls_call(Symbol_table* symtab, Layout* layout, |
| 789 Target_mips* target); |
| 790 |
| 791 void |
| 792 check_non_pic(Relobj*, unsigned int r_type); |
| 793 |
| 794 static bool |
| 795 symbol_needs_plt_entry(const Symbol* sym) |
| 796 { |
| 797 // An undefined symbol from an executable does not need a PLT entry. |
| 798 if (sym->is_undefined() && !parameters->options().shared()) |
| 799 return false; |
| 800 |
| 801 return (!parameters->doing_static_link() |
| 802 && sym->is_func() |
| 803 && (!sym->is_undef_binding_weak()) |
| 804 && (sym->is_from_dynobj() |
| 805 || sym->is_undefined() |
| 806 || sym->is_preemptible())); |
| 807 } |
| 808 |
| 809 // Whether we have issued an error about a non-PIC compilation. |
| 810 bool issued_non_pic_error_; |
| 811 }; |
| 812 |
| 813 // The class which implements relocation. |
| 814 class Relocate |
| 815 { |
| 816 public: |
| 817 // Do a relocation. Return false if the caller should not issue |
| 818 // any warnings about this relocation. |
| 819 inline bool |
| 820 relocate(const Relocate_info<size, big_endian>*, Target_mips*, |
| 821 Output_section*, size_t relnum, |
| 822 const elfcpp::Rela<size, big_endian>*, |
| 823 const elfcpp::Rel<size, big_endian>*, |
| 824 unsigned int, |
| 825 unsigned int, const Sized_symbol<size>*, |
| 826 const Symbol_value<size>*, |
| 827 unsigned char*, |
| 828 typename elfcpp::Elf_types<size>::Elf_Addr, |
| 829 section_size_type); |
| 830 |
| 831 inline bool |
| 832 relocate(const Relocate_info<size, big_endian>*, Target_mips*, |
| 833 Output_section*, size_t relnum, |
| 834 const elfcpp::Rel<size, big_endian>&, |
| 835 unsigned int, const Sized_symbol<size>*, |
| 836 const Symbol_value<size>*, |
| 837 unsigned char*, |
| 838 typename elfcpp::Elf_types<size>::Elf_Addr, |
| 839 section_size_type); |
| 840 |
| 841 inline bool |
| 842 relocate(const Relocate_info<size, big_endian>*, Target_mips*, |
| 843 Output_section*, size_t relnum, |
| 844 const elfcpp::Rela<size, big_endian>&, |
| 845 unsigned int, const Sized_symbol<size>*, |
| 846 const Symbol_value<size>*, |
| 847 unsigned char*, |
| 848 typename elfcpp::Elf_types<size>::Elf_Addr, |
| 849 section_size_type); |
| 850 }; |
| 851 |
| 852 // A class which returns the size required for a relocation type, |
| 853 // used while scanning relocs during a relocatable link. |
| 854 class Relocatable_size_for_reloc |
| 855 { |
| 856 public: |
| 857 unsigned int |
| 858 get_size_for_reloc(unsigned int, Relobj*); |
| 859 }; |
| 860 |
| 861 // Adjust TLS relocation type based on the options and whether this |
| 862 // is a local symbol. |
| 863 static tls::Tls_optimization |
| 864 optimize_tls_reloc(bool is_final, int r_type); |
| 865 |
| 866 // Return whether there is a GOT section. |
| 867 bool |
| 868 has_got_section() const |
| 869 { return this->got_ != NULL; } |
| 870 |
| 871 // Get the GOT section, creating it if necessary. |
| 872 Mips_output_data_got<size, big_endian>* |
| 873 got_section(Symbol_table*, Layout*); |
| 874 |
| 875 Mips_output_data_got<size, big_endian>* |
| 876 got_section() |
| 877 { return this->got_; } |
| 878 |
| 879 // Return processor specific flags |
| 880 elfcpp::Elf_Word |
| 881 processor_specific_flags() const |
| 882 { return this->processor_specific_flags_; } |
| 883 |
| 884 // Set processor specific flags |
| 885 void |
| 886 set_processor_specific_flags(elfcpp::Elf_Word psf) |
| 887 { this->processor_specific_flags_ = psf; } |
| 888 |
| 889 // Check if the given ELF header glags describe a 32-bit binary. |
| 890 bool |
| 891 mips_32bit_flags(elfcpp::Elf_Word); |
| 892 |
| 893 // Check if new architecture extends previous one. |
| 894 bool |
| 895 mips_mach_extends(elfcpp::Elf_Word, elfcpp::Elf_Word); |
| 896 |
| 897 // Merge processor specific flags. |
| 898 void |
| 899 merge_processor_specific_flags(const char*, elfcpp::Elf_Word); |
| 900 |
| 901 // Return the size of the GOT section. |
| 902 section_size_type |
| 903 got_size() const |
| 904 { |
| 905 gold_assert(this->got_ != NULL); |
| 906 return this->got_->data_size(); |
| 907 } |
| 908 |
| 909 // Create a GOT entry for the TLS module index. |
| 910 unsigned int |
| 911 got_mod_index_entry(Symbol_table* symtab, Layout* layout, |
| 912 Sized_relobj_file<size, big_endian>* object); |
| 913 |
| 914 // Create a PLT entry for a global symbol. |
| 915 void |
| 916 make_plt_entry(Symbol_table*, Layout*, Symbol*); |
| 917 |
| 918 // Create a .MIPS.stubs entry for a global symbol. |
| 919 void |
| 920 make_mips_stubs_entry(Symbol_table*, Layout*, Symbol*); |
| 921 |
| 922 // Remove symbol that should not have entry. |
| 923 void |
| 924 remove_stub_entry(Symbol *sym) |
| 925 { |
| 926 if (this->mips_stubs_ != NULL) |
| 927 this->mips_stubs_->remove(sym); |
| 928 } |
| 929 |
| 930 // Create a STUB entry for a global symbol. |
| 931 void |
| 932 make_stub_entry(Layout*); |
| 933 |
| 934 void |
| 935 set_stub_flag() |
| 936 { this->stub_flag_ = true; } |
| 937 |
| 938 bool |
| 939 stub_flag() const |
| 940 { return this->stub_flag_; } |
| 941 |
| 942 // Get the PLT section. |
| 943 const Mips_output_data_plt<size, big_endian>* |
| 944 plt_section() const |
| 945 { |
| 946 gold_assert(this->plt_ != NULL); |
| 947 return this->plt_; |
| 948 } |
| 949 |
| 950 // Get the GOT PLT section. |
| 951 const Mips_output_data_plt<size, big_endian>* |
| 952 got_plt_section() const |
| 953 { |
| 954 gold_assert(this->got_plt_ != NULL); |
| 955 return this->got_plt_; |
| 956 } |
| 957 |
| 958 // Get _gp. |
| 959 Sized_symbol<size>* |
| 960 gp() |
| 961 { return this->gp_; } |
| 962 |
| 963 // Get value of _gp. |
| 964 const typename elfcpp::Elf_types<size>::Elf_Addr |
| 965 gp_address() const |
| 966 { return this->gp_->value(); } |
| 967 |
| 968 // Copy a relocation against a global symbol. |
| 969 void |
| 970 copy_reloc(Symbol_table* symtab, Layout* layout, |
| 971 Sized_relobj_file<size, big_endian>* object, |
| 972 unsigned int shndx, Output_section* output_section, |
| 973 Symbol* sym, const elfcpp::Rel<size, big_endian>& reloc) |
| 974 { |
| 975 this->copy_relocs_.copy_reloc(symtab, layout, |
| 976 symtab->get_sized_symbol<size>(sym), |
| 977 object, shndx, output_section, |
| 978 reloc, this->rel_dyn_section(layout)); |
| 979 } |
| 980 |
| 981 // Copy a relocation against a global symbol. |
| 982 void |
| 983 copy_reloc(Symbol_table* symtab, Layout* layout, |
| 984 Sized_relobj_file<size, big_endian>* object, |
| 985 unsigned int shndx, Output_section* output_section, |
| 986 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) |
| 987 { |
| 988 this->copy_relocsa_.copy_reloc(symtab, layout, |
| 989 symtab->get_sized_symbol<size>(sym), |
| 990 object, shndx, output_section, |
| 991 reloc, this->rela_dyn_section(layout)); |
| 992 } |
| 993 |
| 994 // Calculate value of _gp. |
| 995 void |
| 996 set_gp(Layout*, Symbol_table*); |
| 997 |
| 998 // Get the dynamic reloc section, creating it if necessary. |
| 999 Reloc_section* |
| 1000 rel_dyn_section(Layout*); |
| 1001 |
| 1002 Reloca_section* |
| 1003 rela_dyn_section(Layout*); |
| 1004 |
| 1005 // Add value to MIPS extenstions. |
| 1006 void |
| 1007 add_extension(unsigned long base, unsigned long extension) |
| 1008 { |
| 1009 std::pair<unsigned long, unsigned long> ext(base, extension); |
| 1010 this->extensions_.push_back(ext); |
| 1011 } |
| 1012 |
| 1013 // The types of GOT entries needed for this platform. |
| 1014 // These values are exposed to the ABI in an incremental link. |
| 1015 // Do not renumber existing values without changing the version |
| 1016 // number of the .gnu_incremental_inputs section. |
| 1017 enum Got_type |
| 1018 { |
| 1019 GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol |
| 1020 GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset |
| 1021 GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair |
| 1022 }; |
| 1023 |
| 1024 // Information about this specific target which we pass to the |
| 1025 // general Target structure. |
| 1026 static Target::Target_info mips_info; |
| 1027 // The GOT section. |
| 1028 Mips_output_data_got<size, big_endian>* got_; |
| 1029 // The PLT section. |
| 1030 Mips_output_data_plt<size, big_endian>* plt_; |
| 1031 // The GOT PLT section. |
| 1032 Output_data_space* got_plt_; |
| 1033 // The dynamic reloc section. |
| 1034 Reloc_section* rel_dyn_; |
| 1035 Reloca_section* rela_dyn_; |
| 1036 // Relocs saved to avoid a COPY reloc. |
| 1037 Copy_relocs<elfcpp::SHT_REL, size, big_endian> copy_relocs_; |
| 1038 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocsa_; |
| 1039 // Offset of the GOT entry for the TLS module index. |
| 1040 unsigned int got_mod_index_offset_; |
| 1041 // Value of the _gp |
| 1042 Sized_symbol<size>* gp_; |
| 1043 // The stub section. |
| 1044 Mips_output_data_stub<size, big_endian>* stub_; |
| 1045 // Stub flag |
| 1046 bool stub_flag_; |
| 1047 // Map of stub symbols |
| 1048 Stub_symbol_info stub_symbol_; |
| 1049 // processor-specific flags in ELF file header. |
| 1050 elfcpp::Elf_Word processor_specific_flags_; |
| 1051 // Architecture extensions. |
| 1052 std::vector<std::pair<unsigned long, unsigned long> > extensions_; |
| 1053 // .MIPS.stubs |
| 1054 Mips_output_data_mips_stubs<size, big_endian>* mips_stubs_; |
| 1055 // .text section |
| 1056 Output_section *text_section_; |
| 1057 // Layout |
| 1058 Layout* layout_; |
| 1059 // Symbol table |
| 1060 Symbol_table* symtab_; |
| 1061 }; |
| 1062 |
| 1063 // Helper structure for R_MIPS_HI/LO16 and R_MIPS16_HI/LO16 relocations |
| 1064 |
| 1065 template<int size, bool big_endian> |
| 1066 struct hi16 |
| 1067 { |
| 1068 unsigned char* view; |
| 1069 typename elfcpp::Swap<32, big_endian>::Valtype symval; |
| 1070 typename elfcpp::Elf_types<size>::Elf_Addr addend; |
| 1071 }; |
| 1072 |
| 1073 template<int size, bool big_endian> |
| 1074 class Mips_relocate_functions : public Relocate_functions<size, big_endian> |
| 1075 { |
| 1076 public: |
| 1077 typedef enum |
| 1078 { |
| 1079 STATUS_OKAY, // No error during relocation. |
| 1080 STATUS_OVERFLOW, // Relocation overflow. |
| 1081 STATUS_BAD_RELOC // Relocation cannot be applied. |
| 1082 } Status; |
| 1083 |
| 1084 private: |
| 1085 typedef Relocate_functions<size, big_endian> Base; |
| 1086 typedef Mips_relocate_functions<size, big_endian> This; |
| 1087 |
| 1088 public: |
| 1089 // R_MIPS_16 |
| 1090 static inline typename This::Status |
| 1091 rel16(unsigned char* view, |
| 1092 const Sized_relobj_file<size, big_endian>* object, |
| 1093 const Symbol_value<size>* psymval, |
| 1094 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1095 unsigned int rel_type) |
| 1096 { |
| 1097 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1098 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1099 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1100 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1101 Reltype addend; |
| 1102 |
| 1103 if (rel_type == elfcpp::SHT_RELA) |
| 1104 addend = Bits<16>::sign_extend32(addend_o); |
| 1105 else |
| 1106 addend = Bits<16>::sign_extend32(val); |
| 1107 |
| 1108 Reltype x = psymval->value(object, addend); |
| 1109 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1110 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1111 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1112 ? This::STATUS_OVERFLOW |
| 1113 : This::STATUS_OKAY); |
| 1114 } |
| 1115 |
| 1116 // R_MIPS_32 |
| 1117 static inline typename This::Status |
| 1118 rel32(unsigned char* view, |
| 1119 const Sized_relobj_file<size, big_endian>* object, |
| 1120 const Symbol_value<size>* psymval, |
| 1121 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1122 unsigned int rel_type) |
| 1123 { |
| 1124 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1125 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1126 Valtype addend; |
| 1127 |
| 1128 if (rel_type == elfcpp::SHT_RELA) |
| 1129 addend = Bits<32>::sign_extend32(addend_o); |
| 1130 else |
| 1131 addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1132 |
| 1133 Valtype x = psymval->value(object, addend); |
| 1134 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1135 return This::STATUS_OKAY; |
| 1136 } |
| 1137 |
| 1138 // R_MIPS_JALR |
| 1139 static inline typename This::Status |
| 1140 reljalr(unsigned char* view, |
| 1141 const Sized_relobj_file<size, big_endian>* object, |
| 1142 const Symbol_value<size>* psymval, |
| 1143 typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 1144 { |
| 1145 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1146 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1147 Valtype instr = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1148 Valtype x = psymval->value(object, 0); |
| 1149 Valtype offset = x - address - 4; |
| 1150 |
| 1151 if (!Bits<17>::has_signed_unsigned_overflow32(offset)) |
| 1152 { |
| 1153 if (instr == 0x0320f809) // jalr t9 |
| 1154 { |
| 1155 // bal addr |
| 1156 Valtype jalr = 0x04110000 | ((offset >> 2) & 0x0000ffffU); |
| 1157 elfcpp::Swap<32, big_endian>::writeval(wv, jalr); |
| 1158 } |
| 1159 else if (instr == 0x03200008) //jr t9 |
| 1160 { |
| 1161 // b addr |
| 1162 Valtype jalr = 0x10000000 | ((offset >> 2) & 0x0000ffffU); |
| 1163 elfcpp::Swap<32, big_endian>::writeval(wv, jalr); |
| 1164 } |
| 1165 } |
| 1166 return This::STATUS_OKAY; |
| 1167 } |
| 1168 |
| 1169 // R_MIPS_REL32, R_MIPS_PC32 |
| 1170 static inline typename This::Status |
| 1171 relrel32(unsigned char* view, |
| 1172 const Sized_relobj_file<size, big_endian>* object, |
| 1173 const Symbol_value<size>* psymval, |
| 1174 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 1175 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1176 unsigned int rel_type) |
| 1177 { |
| 1178 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1179 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1180 Valtype addend; |
| 1181 |
| 1182 if (rel_type == elfcpp::SHT_RELA) |
| 1183 addend = Bits<32>::sign_extend32(addend_o); |
| 1184 else |
| 1185 addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1186 |
| 1187 Valtype x = (psymval->value(object, addend)) - address; |
| 1188 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1189 return This::STATUS_OKAY; |
| 1190 } |
| 1191 |
| 1192 // R_MIPS_26 |
| 1193 static inline typename This::Status |
| 1194 rel26(unsigned char* view, |
| 1195 const Sized_relobj_file<size, big_endian>* object, |
| 1196 const Symbol_value<size>* psymval, |
| 1197 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 1198 bool local, |
| 1199 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1200 unsigned int rel_type) |
| 1201 { |
| 1202 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1203 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1204 Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1205 Valtype addend; |
| 1206 |
| 1207 if (local) |
| 1208 { |
| 1209 if (rel_type == elfcpp::SHT_RELA) |
| 1210 addend = ((addend_o & 0x03ffffffU) | ((address + 4) & 0xf0000000U)); |
| 1211 else |
| 1212 addend = ((val & 0x03ffffffU) | ((address + 4) & 0xf0000000U)); |
| 1213 } |
| 1214 else |
| 1215 { |
| 1216 if (rel_type == elfcpp::SHT_RELA) |
| 1217 addend = Bits<26>::sign_extend32(addend_o); |
| 1218 else |
| 1219 addend = Bits<26>::sign_extend32(val & 0x03ffffffU); |
| 1220 } |
| 1221 |
| 1222 Valtype x = psymval->value(object, addend << 2); |
| 1223 val = Bits<32>::bit_select32(val, x >> 2, 0x03ffffffU); |
| 1224 elfcpp::Swap<32, big_endian>::writeval(wv, val); |
| 1225 return This::STATUS_OKAY; |
| 1226 } |
| 1227 |
| 1228 // R_MIPS_SHIFT5 |
| 1229 static inline typename This::Status |
| 1230 relsh5(unsigned char* view, |
| 1231 const Sized_relobj_file<size, big_endian>* object, |
| 1232 const Symbol_value<size>* psymval, |
| 1233 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1234 unsigned int rel_type) |
| 1235 { |
| 1236 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1237 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1238 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1239 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1240 Reltype addend; |
| 1241 |
| 1242 if (rel_type == elfcpp::SHT_RELA) |
| 1243 addend = Bits<11>::sign_extend32(addend_o); |
| 1244 else |
| 1245 addend = Bits<11>::sign_extend32(val & 0x000007c0U); |
| 1246 |
| 1247 Reltype x = psymval->value(object, addend); |
| 1248 val = Bits<11>::bit_select32(val, x, 0x000007c0U); |
| 1249 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1250 return ((Bits<11>::has_signed_unsigned_overflow32(x) || ((x & 0x3fU) != 0)) |
| 1251 ? This::STATUS_OVERFLOW |
| 1252 : This::STATUS_OKAY); |
| 1253 } |
| 1254 |
| 1255 // R_MIPS_SHIFT6 |
| 1256 static inline typename This::Status |
| 1257 relsh6(unsigned char* view, |
| 1258 const Sized_relobj_file<size, big_endian>* object, |
| 1259 const Symbol_value<size>* psymval, |
| 1260 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1261 unsigned int rel_type) |
| 1262 { |
| 1263 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1264 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1265 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1266 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1267 Reltype addend; |
| 1268 |
| 1269 if (rel_type == elfcpp::SHT_RELA) |
| 1270 addend = Bits<11>::sign_extend32(addend_o); |
| 1271 else |
| 1272 addend = Bits<11>::sign_extend32(val & 0x000007c0U) |
| 1273 || ((val & 0x00004U) << 2); |
| 1274 Reltype x = psymval->value(object, addend); |
| 1275 x = (x & ~0x00000020U) | ((x & 0x00000020U) >> 2); |
| 1276 val = Bits<16>::bit_select32(val, x, 0x000007c4U); |
| 1277 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1278 return ((Bits<11>::has_signed_unsigned_overflow32(x) || ((x & 0x37U) != 0)) |
| 1279 ? This::STATUS_OVERFLOW |
| 1280 : This::STATUS_OKAY); |
| 1281 } |
| 1282 |
| 1283 // R_MIPS_SUB |
| 1284 static inline typename This::Status |
| 1285 relsub(unsigned char* view, |
| 1286 const Sized_relobj_file<size, big_endian>* object, |
| 1287 const Symbol_value<size>* psymval, |
| 1288 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1289 unsigned int rel_type) |
| 1290 { |
| 1291 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 1292 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1293 Valtype addend; |
| 1294 |
| 1295 if (rel_type == elfcpp::SHT_RELA) |
| 1296 addend = addend_o; |
| 1297 else |
| 1298 addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1299 |
| 1300 Valtype x = (psymval->value(object, -addend)); |
| 1301 elfcpp::Swap<64, big_endian>::writeval(wv, x); |
| 1302 return This::STATUS_OKAY; |
| 1303 } |
| 1304 |
| 1305 // R_MIPS_HIGHER |
| 1306 static inline typename This::Status |
| 1307 relhigher(unsigned char* view, |
| 1308 const Sized_relobj_file<size, big_endian>* object, |
| 1309 const Symbol_value<size>* psymval, |
| 1310 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1311 unsigned int rel_type) |
| 1312 { |
| 1313 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 1314 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1315 Valtype addend; |
| 1316 |
| 1317 if (rel_type == elfcpp::SHT_RELA) |
| 1318 addend = addend_o; |
| 1319 else |
| 1320 addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1321 |
| 1322 Valtype x = (((Valtype)(psymval->value(object, addend) + 0x80008000) >> 32) |
| 1323 & 0xffffU); |
| 1324 elfcpp::Swap<64, big_endian>::writeval(wv, x); |
| 1325 return This::STATUS_OKAY; |
| 1326 } |
| 1327 |
| 1328 // R_MIPS_HIGHEST |
| 1329 static inline typename This::Status |
| 1330 relhighest(unsigned char* view, |
| 1331 const Sized_relobj_file<size, big_endian>* object, |
| 1332 const Symbol_value<size>* psymval, |
| 1333 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1334 unsigned int rel_type) |
| 1335 { |
| 1336 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 1337 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1338 Valtype addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1339 |
| 1340 if (rel_type == elfcpp::SHT_RELA) |
| 1341 addend = addend_o; |
| 1342 else |
| 1343 addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1344 |
| 1345 Valtype x = (((Valtype)(psymval->value(object, addend) + 0x800080008000) |
| 1346 >> 48) & 0xffffU); |
| 1347 elfcpp::Swap<64, big_endian>::writeval(wv, x); |
| 1348 return This::STATUS_OKAY; |
| 1349 } |
| 1350 |
| 1351 // R_MIPS_SCN_DISP |
| 1352 static inline typename This::Status |
| 1353 relscndisp(unsigned char* view, |
| 1354 const Sized_relobj_file<size, big_endian>* object, |
| 1355 const Symbol_value<size>* psymval, |
| 1356 typename elfcpp::Elf_types<size>::Elf_Off offset, |
| 1357 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1358 unsigned int rel_type) |
| 1359 { |
| 1360 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1361 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1362 Valtype addend; |
| 1363 |
| 1364 if (rel_type == elfcpp::SHT_RELA) |
| 1365 addend = addend_o; |
| 1366 else |
| 1367 addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1368 |
| 1369 Valtype x = (psymval->value(object, addend)) - offset; |
| 1370 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1371 return This::STATUS_OKAY; |
| 1372 } |
| 1373 |
| 1374 // R_MIPS_PC16, R_MIPS_GNU_REL16_S2 |
| 1375 static inline typename This::Status |
| 1376 relpc16(unsigned char* view, |
| 1377 const Sized_relobj_file<size, big_endian>* object, |
| 1378 const Symbol_value<size>* psymval, |
| 1379 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 1380 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1381 unsigned int rel_type) |
| 1382 { |
| 1383 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1384 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1385 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1386 Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1387 Reltype addend; |
| 1388 |
| 1389 if (rel_type == elfcpp::SHT_REL) |
| 1390 addend = Bits<16>::sign_extend32(val); |
| 1391 else |
| 1392 addend = Bits<18>::sign_extend32(addend_o); |
| 1393 |
| 1394 Reltype x = psymval->value(object, addend) - address; |
| 1395 val = Bits<16>::bit_select32(val, x >> 2, 0x0000ffffU); |
| 1396 elfcpp::Swap<32, big_endian>::writeval(wv, val); |
| 1397 return (Bits<18>::has_signed_unsigned_overflow32(x) |
| 1398 ? This::STATUS_OVERFLOW |
| 1399 : This::STATUS_OKAY); |
| 1400 } |
| 1401 |
| 1402 // R_MIPS_HI16, R_MIPS16_HI16, R_MIPS_GOT16, R_MIPS16_GOT16 |
| 1403 static inline typename This::Status |
| 1404 relhi16(unsigned char* view, |
| 1405 typename elfcpp::Swap<32, big_endian>::Valtype symval, |
| 1406 typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1407 { |
| 1408 struct hi16<size, big_endian>* _hi16 = new hi16<size, big_endian>; |
| 1409 |
| 1410 if (!_hi16) |
| 1411 return This::STATUS_OVERFLOW; |
| 1412 |
| 1413 _hi16->view = view; |
| 1414 _hi16->symval = symval; |
| 1415 _hi16->addend = addend; |
| 1416 |
| 1417 This::hi16_list.push_back(_hi16); |
| 1418 return This::STATUS_OKAY; |
| 1419 } |
| 1420 |
| 1421 // R_MIPS_LO16, R_MIPS16_LO16 |
| 1422 static inline typename This::Status |
| 1423 rello16(unsigned char* view, |
| 1424 const Sized_relobj_file<size, big_endian>* object, |
| 1425 const Symbol_value<size>* psymval, |
| 1426 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1427 unsigned int rel_type) |
| 1428 { |
| 1429 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1430 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1431 Valtype* wvlo = reinterpret_cast<Valtype*>(view), *wv; |
| 1432 Valtype vallo = elfcpp::Swap<16, big_endian>::readval(wvlo), val; |
| 1433 Reltype addendlo, addend; |
| 1434 Reltype x, xlo; |
| 1435 |
| 1436 if (rel_type == elfcpp::SHT_RELA) |
| 1437 addendlo = addend_o; |
| 1438 else |
| 1439 addendlo = Bits<16>::sign_extend32(vallo); |
| 1440 |
| 1441 xlo = psymval->value(object, addendlo); |
| 1442 vallo = Bits<16>::bit_select32(vallo, xlo, 0x0000ffffU); |
| 1443 |
| 1444 while (hi16_list.size()) |
| 1445 { |
| 1446 struct hi16<size, big_endian>* _hi16 = hi16_list.back(); |
| 1447 wv = reinterpret_cast<Valtype*>(_hi16->view); |
| 1448 |
| 1449 if (rel_type == elfcpp::SHT_RELA) |
| 1450 addend = _hi16->addend; |
| 1451 else |
| 1452 addend = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1453 |
| 1454 x = _hi16->symval + addendlo + (addend << 16); |
| 1455 x += 0x00008000U; |
| 1456 x >>= 16; |
| 1457 |
| 1458 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1459 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1460 |
| 1461 free(_hi16); |
| 1462 This::hi16_list.pop_back(); |
| 1463 }; |
| 1464 |
| 1465 elfcpp::Swap<16, big_endian>::writeval(wvlo, vallo); |
| 1466 return This::STATUS_OKAY; |
| 1467 } |
| 1468 |
| 1469 //R_MIPS_64 |
| 1470 static inline typename This::Status |
| 1471 rel64(unsigned char* view, |
| 1472 const Sized_relobj_file<size, big_endian>* object, |
| 1473 const Symbol_value<size>* psymval, |
| 1474 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1475 unsigned int rel_type) |
| 1476 { |
| 1477 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 1478 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1479 Valtype addend; |
| 1480 |
| 1481 if (rel_type == elfcpp::SHT_RELA) |
| 1482 addend = addend_o; |
| 1483 else |
| 1484 addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1485 |
| 1486 Valtype x = psymval->value(object, addend); |
| 1487 elfcpp::Swap<64, big_endian>::writeval(wv, x); |
| 1488 return This::STATUS_OKAY; |
| 1489 } |
| 1490 static typename std::vector<struct hi16<size, big_endian> *> hi16_list; |
| 1491 |
| 1492 // R_MIPS_GOT_DISP, R_MIPS_GOT_PAGE, |
| 1493 // R_MIPS_TLS_GOTTPREL, R_MIPS_TLS_GD, R_MIPS_TLS_LDM |
| 1494 static inline typename This::Status |
| 1495 relgotofst(unsigned char* view, |
| 1496 typename elfcpp::Swap<32, big_endian>::Valtype got_offset) |
| 1497 { |
| 1498 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1499 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1500 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1501 Reltype x = got_offset; |
| 1502 elfcpp::Swap<16, big_endian>::writeval(wv, x); |
| 1503 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1504 ? This::STATUS_OVERFLOW |
| 1505 : This::STATUS_OKAY); |
| 1506 } |
| 1507 |
| 1508 // R_MIPS_GOT16, R_MIPS16_GOT16 |
| 1509 static inline typename This::Status |
| 1510 relgot16(unsigned char* view, |
| 1511 const Sized_relobj_file<size, big_endian>* object, |
| 1512 const Symbol_value<size>* psymval, |
| 1513 const typename elfcpp::Swap<size, big_endian>::Valtype _gp, |
| 1514 unsigned char* got_view, |
| 1515 const typename elfcpp::Swap<size, big_endian>::Valtype got_address, |
| 1516 const typename elfcpp::Swap<size, big_endian>::Valtype got_offset, |
| 1517 const Sized_symbol<size>* gsym, |
| 1518 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1519 unsigned int rel_type) |
| 1520 { |
| 1521 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1522 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1523 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1524 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1525 Reltype x = got_address - _gp; |
| 1526 |
| 1527 if (gsym != NULL) |
| 1528 // TODO AS: Constant GOT_TYPE_STANDARD should be used. |
| 1529 x += gsym->got_offset(0); |
| 1530 else |
| 1531 { |
| 1532 Valtype addend; |
| 1533 |
| 1534 if (rel_type == elfcpp::SHT_RELA) |
| 1535 addend = Bits<16>::sign_extend32(addend_o); |
| 1536 else |
| 1537 addend = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1538 |
| 1539 // got_view points to beggining of location, data is written |
| 1540 // in the second half |
| 1541 relhi16(got_view + 2, psymval->value(object, addend << 16), 0); |
| 1542 x = got_address + got_offset - _gp; |
| 1543 } |
| 1544 |
| 1545 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1546 |
| 1547 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1548 |
| 1549 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1550 ? This::STATUS_OVERFLOW |
| 1551 : This::STATUS_OKAY); |
| 1552 } |
| 1553 |
| 1554 // R_MIPS_GPREL16, R_MIPS16_GPREL and R_MIPS_LITERAL |
| 1555 static inline typename This::Status |
| 1556 relgprel(unsigned char* view, |
| 1557 const Sized_relobj_file<size, big_endian>* object, |
| 1558 const Symbol_value<size>* psymval, |
| 1559 const typename elfcpp::Swap<size, big_endian>::Valtype _gp, |
| 1560 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1561 unsigned int rel_type) |
| 1562 { |
| 1563 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1564 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1565 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1566 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1567 Reltype addend; |
| 1568 |
| 1569 if (rel_type == elfcpp::SHT_RELA) |
| 1570 addend = Bits<16>::sign_extend32(addend_o); |
| 1571 else |
| 1572 addend = Bits<16>::sign_extend32(val); |
| 1573 |
| 1574 Reltype x = psymval->value(object, addend) - _gp; |
| 1575 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1576 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1577 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1578 ? This::STATUS_OVERFLOW |
| 1579 : This::STATUS_OKAY); |
| 1580 } |
| 1581 |
| 1582 // R_MIPS_GPREL32 |
| 1583 static inline typename This::Status |
| 1584 relgprel32(unsigned char* view, |
| 1585 const Sized_relobj_file<size, big_endian>* object, |
| 1586 const Symbol_value<size>* psymval, |
| 1587 const typename elfcpp::Swap<size, big_endian>::Valtype gp, |
| 1588 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1589 unsigned int rel_type) |
| 1590 { |
| 1591 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1592 size_t sec_num; |
| 1593 for (sec_num = 0; sec_num < object->shnum(); sec_num++) |
| 1594 if (((Object*)object)->section_type(sec_num) == elfcpp::SHT_MIPS_REGINFO) |
| 1595 break; |
| 1596 |
| 1597 gold::section_size_type section_size = 24; |
| 1598 const unsigned char* reginfo = ((Object*)object)->section_contents(sec_num, |
| 1599 §ion_size, false) + 20; |
| 1600 const Valtype* ri = reinterpret_cast<const Valtype*>(reginfo); |
| 1601 Valtype gp0 = elfcpp::Swap<32, big_endian>::readval(ri); |
| 1602 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1603 Valtype addend; |
| 1604 |
| 1605 if (rel_type == elfcpp::SHT_RELA) |
| 1606 addend = Bits<32>::sign_extend32(addend_o); |
| 1607 else |
| 1608 addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1609 |
| 1610 Valtype x = (psymval->value(object, addend)) + gp0 - gp; |
| 1611 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1612 return This::STATUS_OKAY; |
| 1613 } |
| 1614 |
| 1615 // R_MIPS_GLOB_DAT |
| 1616 static inline typename This::Status |
| 1617 relglob(unsigned char* view, |
| 1618 const Sized_relobj_file<size, big_endian>* object, |
| 1619 const Symbol_value<size>* psymval) |
| 1620 { |
| 1621 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1622 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1623 elfcpp::Swap<32, big_endian>::writeval(wv, psymval->value(object, 0)); |
| 1624 return This::STATUS_OKAY; |
| 1625 } |
| 1626 |
| 1627 // R_MIPS_TLS_TPREL32, R_MIPS_TLS_DTPREL32 |
| 1628 static inline typename This::Status |
| 1629 tlsrel32(unsigned char* view, |
| 1630 const Sized_relobj_file<size, big_endian>* object, |
| 1631 const Symbol_value<size>* psymval, |
| 1632 const typename elfcpp::Swap<32, big_endian>::Valtype offset, |
| 1633 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1634 unsigned int rel_type) |
| 1635 { |
| 1636 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1637 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1638 Valtype addend; |
| 1639 |
| 1640 if (rel_type == elfcpp::SHT_RELA) |
| 1641 addend = Bits<32>::sign_extend32(addend_o); |
| 1642 else |
| 1643 addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1644 |
| 1645 Valtype x = psymval->value(object, addend) - offset; |
| 1646 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1647 return This::STATUS_OKAY; |
| 1648 } |
| 1649 |
| 1650 // R_MIPS_TLS_TPREL_LO16, R_MIPS_TLS_DTPREL_LO16 |
| 1651 static inline typename This::Status |
| 1652 tlsrello16(unsigned char* view, |
| 1653 const Sized_relobj_file<size, big_endian>* object, |
| 1654 const Symbol_value<size>* psymval, |
| 1655 const typename elfcpp::Swap<32, big_endian>::Valtype offset, |
| 1656 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1657 unsigned int rel_type) |
| 1658 { |
| 1659 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1660 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1661 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1662 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1663 Reltype addend; |
| 1664 |
| 1665 if (rel_type == elfcpp::SHT_RELA) |
| 1666 addend = Bits<16>::sign_extend32(addend_o); |
| 1667 else |
| 1668 addend = Bits<16>::sign_extend32(val); |
| 1669 |
| 1670 Reltype x = psymval->value(object, addend) - offset; |
| 1671 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1672 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1673 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1674 ? This::STATUS_OVERFLOW |
| 1675 : This::STATUS_OKAY); |
| 1676 } |
| 1677 |
| 1678 // R_MIPS_TLS_TPREL_HI16, R_MIPS_TLS_DTPREL_HI16 |
| 1679 static inline typename This::Status |
| 1680 tlsrelhi16(unsigned char* view, |
| 1681 const Sized_relobj_file<size, big_endian>* object, |
| 1682 const Symbol_value<size>* psymval, |
| 1683 const typename elfcpp::Swap<32, big_endian>::Valtype offset, |
| 1684 typename elfcpp::Elf_types<size>::Elf_Addr addend_o, |
| 1685 unsigned int rel_type) |
| 1686 { |
| 1687 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1688 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1689 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1690 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1691 Reltype addend; |
| 1692 |
| 1693 if (rel_type == elfcpp::SHT_RELA) |
| 1694 addend = Bits<16>::sign_extend32(addend_o); |
| 1695 else |
| 1696 addend = Bits<16>::sign_extend32(val); |
| 1697 |
| 1698 Reltype x = ((psymval->value(object, addend) - offset) + 0x8000U) >> 16; |
| 1699 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1700 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1701 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1702 ? This::STATUS_OVERFLOW |
| 1703 : This::STATUS_OKAY); |
| 1704 } |
| 1705 }; |
| 1706 |
| 1707 template<int size> |
| 1708 void |
| 1709 Mips_output_section_reginfo<size>::set_final_data_size() |
| 1710 { |
| 1711 // Set data size. |
| 1712 this->set_data_size(24); |
| 1713 } |
| 1714 |
| 1715 template<int size> |
| 1716 void |
| 1717 Mips_output_section_reginfo<size>::do_write(Output_file* of) |
| 1718 { |
| 1719 // Set output data |
| 1720 for (Input_section_list::const_iterator p = this->input_sections().begin(); |
| 1721 p != this->input_sections().end(); |
| 1722 ++p) |
| 1723 { |
| 1724 unsigned int shndx = p->shndx(); |
| 1725 Relobj* relobj = p->relobj(); |
| 1726 |
| 1727 section_size_type section_size; |
| 1728 const unsigned char* section_contents = |
| 1729 relobj->section_contents(shndx, §ion_size, false); |
| 1730 |
| 1731 for (size_t i = 0; i < 20; i++) |
| 1732 this->data_[i] |= section_contents[i]; |
| 1733 } |
| 1734 |
| 1735 unsigned long gp_val = 0; |
| 1736 if (this->gp_ != NULL) |
| 1737 gp_val = this->gp_->value(); |
| 1738 |
| 1739 this->data_[20]=gp_val & 0xff; |
| 1740 this->data_[21]=(gp_val >> 8) & 0xff; |
| 1741 this->data_[22]=(gp_val >> 16) & 0xff; |
| 1742 this->data_[23]=(gp_val >> 24) & 0xff; |
| 1743 |
| 1744 off_t offset = this->offset(); |
| 1745 off_t data_size = this->data_size(); |
| 1746 |
| 1747 unsigned char* view = of->get_output_view(offset, data_size); |
| 1748 memcpy(view, this->data_, data_size); |
| 1749 of->write_output_view(offset, data_size, view); |
| 1750 } |
| 1751 |
| 1752 // Return the value to use for a dynamic symbol which requires special |
| 1753 // treatment. This is how we support equality comparisons of function |
| 1754 // pointers across shared library boundaries, as described in the |
| 1755 // processor specific ABI supplement. |
| 1756 |
| 1757 template<int size, bool big_endian> |
| 1758 uint64_t |
| 1759 Target_mips<size, big_endian>::do_dynsym_value(const Symbol* gsym) const |
| 1760 { |
| 1761 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); |
| 1762 |
| 1763 if (gsym->plt_offset() == 0) |
| 1764 return 0; |
| 1765 |
| 1766 if ((this->mips_stubs() == NULL) || |
| 1767 (this->mips_stubs()->is_plt_symbol((Sized_symbol<size> *)gsym))) |
| 1768 return this->plt_section()->address() + gsym->plt_offset(); |
| 1769 else |
| 1770 return this->mips_stubs()->address() + |
| 1771 gsym->plt_offset() * (this->mips_stubs()->big_dyn_symtab() ? 20 : 16); |
| 1772 } |
| 1773 |
| 1774 template<int size, bool big_endian> |
| 1775 typename std::vector<struct hi16<size, big_endian> *> |
| 1776 Mips_relocate_functions<size, big_endian>::hi16_list; |
| 1777 |
| 1778 // Get the dynamic reloc section, creating it if necessary. |
| 1779 |
| 1780 template<int size, bool big_endian> |
| 1781 typename Target_mips<size, big_endian>::Reloc_section* |
| 1782 Target_mips<size, big_endian>::rel_dyn_section(Layout* layout) |
| 1783 { |
| 1784 if (this->rel_dyn_ == NULL) |
| 1785 { |
| 1786 gold_assert(layout != NULL); |
| 1787 this->rel_dyn_ = new Reloc_section(parameters->options().combreloc()); |
| 1788 layout->add_output_section_data(".rel.dyn", elfcpp::SHT_REL, |
| 1789 elfcpp::SHF_ALLOC, this->rel_dyn_, |
| 1790 ORDER_DYNAMIC_RELOCS, false); |
| 1791 } |
| 1792 return this->rel_dyn_; |
| 1793 } |
| 1794 |
| 1795 template<int size, bool big_endian> |
| 1796 typename Target_mips<size, big_endian>::Reloca_section* |
| 1797 Target_mips<size, big_endian>::rela_dyn_section(Layout* layout) |
| 1798 { |
| 1799 if (this->rela_dyn_ == NULL) |
| 1800 { |
| 1801 gold_assert(layout != NULL); |
| 1802 this->rela_dyn_ = new Reloca_section(parameters->options().combreloc()); |
| 1803 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, |
| 1804 elfcpp::SHF_ALLOC, this->rela_dyn_, |
| 1805 ORDER_DYNAMIC_RELOCS, false); |
| 1806 } |
| 1807 return this->rela_dyn_; |
| 1808 } |
| 1809 |
| 1810 // Get the GOT section, creating it if necessary. |
| 1811 |
| 1812 template<int size, bool big_endian> |
| 1813 Mips_output_data_got<size, big_endian>* |
| 1814 Target_mips<size, big_endian>::got_section(Symbol_table* symtab, |
| 1815 Layout* layout) |
| 1816 { |
| 1817 if (this->got_ == NULL) |
| 1818 { |
| 1819 gold_assert(symtab != NULL && layout != NULL); |
| 1820 |
| 1821 this->got_ = new Mips_output_data_got<size, big_endian>(symtab, layout); |
| 1822 |
| 1823 this->got_plt_ = new Output_data_space(4, "** GOT PLT"); |
| 1824 |
| 1825 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, |
| 1826 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE | |
| 1827 elfcpp::SHF_MIPS_GPREL, |
| 1828 this->got_, ORDER_DATA, false); |
| 1829 |
| 1830 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. |
| 1831 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
| 1832 Symbol_table::PREDEFINED, |
| 1833 this->got_, |
| 1834 0, 0, elfcpp::STT_OBJECT, |
| 1835 elfcpp::STB_GLOBAL, |
| 1836 elfcpp::STV_DEFAULT, 0, |
| 1837 false, false); |
| 1838 } |
| 1839 |
| 1840 // Set _gp value, too. |
| 1841 this->set_gp(layout, symtab); |
| 1842 |
| 1843 return this->got_; |
| 1844 } |
| 1845 |
| 1846 template<int size, bool big_endian> |
| 1847 void |
| 1848 Mips_output_data_got<size, big_endian>::add_tls_gd_with_static_reloc( |
| 1849 unsigned int got_type, |
| 1850 Symbol* gsym) |
| 1851 { |
| 1852 if (gsym->has_got_offset(got_type)) |
| 1853 return; |
| 1854 |
| 1855 // We are doing a static link. Just mark it as belong to module 1, |
| 1856 // the executable. |
| 1857 unsigned int got_offset = this->add_constant(1); |
| 1858 gsym->set_got_offset(got_type, got_offset); |
| 1859 got_offset = this->add_constant(0); |
| 1860 this->static_relocs_.push_back(Static_reloc(got_offset, |
| 1861 size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 : elfcpp::R_MIPS_TLS_DTPREL64, |
| 1862 gsym)); |
| 1863 } |
| 1864 |
| 1865 template<int size, bool big_endian> |
| 1866 void |
| 1867 Mips_output_data_got<size, big_endian>::add_tls_gd_local_reloc( |
| 1868 unsigned int got_type, |
| 1869 Sized_relobj_file<size, big_endian>* object, |
| 1870 unsigned int index) |
| 1871 { |
| 1872 if (object->local_has_got_offset(index, got_type)) |
| 1873 return; |
| 1874 |
| 1875 unsigned int got_offset = this->add_constant(1); |
| 1876 object->set_local_got_offset(index, got_type, got_offset); |
| 1877 got_offset = this->add_constant(0); |
| 1878 this->static_relocs_.push_back(Static_reloc(got_offset, |
| 1879 size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 : elfcpp::R_MIPS_TLS_DTPREL64, |
| 1880 object, index)); |
| 1881 } |
| 1882 |
| 1883 // Calculate value of gp_. |
| 1884 |
| 1885 template<int size, bool big_endian> |
| 1886 void |
| 1887 Target_mips<size, big_endian>::set_gp(Layout* layout, Symbol_table* symtab) |
| 1888 { |
| 1889 if (gp_ == NULL) |
| 1890 { |
| 1891 Sized_symbol<size>* sym = |
| 1892 static_cast<Sized_symbol<size>*>(symtab->lookup("_gp")); |
| 1893 |
| 1894 if ((sym == NULL) || (sym->source() != Symbol::IS_CONSTANT)) |
| 1895 { |
| 1896 Output_data *got_section = layout->find_output_section(".got"); |
| 1897 |
| 1898 gold_assert(got_section != NULL); |
| 1899 |
| 1900 if (sym == NULL) |
| 1901 sym =static_cast<Sized_symbol<size>*>(symtab->define_in_output_data( |
| 1902 "_gp", NULL, Symbol_table::PREDEFINED, |
| 1903 got_section, 0x7ff0, 0, |
| 1904 elfcpp::STT_OBJECT, |
| 1905 elfcpp::STB_GLOBAL, |
| 1906 elfcpp::STV_DEFAULT, |
| 1907 0, false, false)); |
| 1908 else |
| 1909 { |
| 1910 sym->init_output_data("_gp", NULL, got_section, 0x7ff0, 0, |
| 1911 elfcpp::STT_OBJECT, |
| 1912 elfcpp::STB_GLOBAL, |
| 1913 elfcpp::STV_DEFAULT, 0, |
| 1914 false, false); |
| 1915 } |
| 1916 gold_assert(sym != NULL); |
| 1917 } |
| 1918 |
| 1919 this->gp_ = sym; |
| 1920 } |
| 1921 } |
| 1922 |
| 1923 // A class to handle the STUB data. |
| 1924 |
| 1925 template<int size, bool big_endian> |
| 1926 class Mips_output_data_stub : public Output_section_data |
| 1927 { |
| 1928 public: |
| 1929 typedef std::vector<Symbol *> symbol_list; |
| 1930 Mips_output_data_stub(); |
| 1931 |
| 1932 // Add an entry to the STUB. |
| 1933 void add_entry(Symbol_table* symtab, |
| 1934 Target_mips<size, big_endian>* target, |
| 1935 Symbol* gsym); |
| 1936 |
| 1937 // Return the number of STUB entries. |
| 1938 unsigned int |
| 1939 entry_count() const |
| 1940 { return this->count_; } |
| 1941 |
| 1942 // Add stub symbol |
| 1943 void |
| 1944 add_symbol(Symbol *sym) |
| 1945 { symbols.push_back(sym); } |
| 1946 |
| 1947 // Get symbol on position n |
| 1948 Symbol * |
| 1949 symbol(unsigned int n) |
| 1950 { return symbols[n]; } |
| 1951 |
| 1952 protected: |
| 1953 void do_adjust_output_section(Output_section* os); |
| 1954 |
| 1955 private: |
| 1956 // Template for subsequent STUB entries. |
| 1957 static const uint32_t stub_entry[4]; |
| 1958 |
| 1959 // Set the final size. |
| 1960 void |
| 1961 set_final_data_size() |
| 1962 { |
| 1963 unsigned int full_count = this->count_ * 4; |
| 1964 |
| 1965 this->set_data_size(full_count * 4); |
| 1966 } |
| 1967 |
| 1968 // Write out the STUB data. |
| 1969 void |
| 1970 do_write(Output_file*); |
| 1971 |
| 1972 // The number of STUB entries. |
| 1973 unsigned int count_; |
| 1974 |
| 1975 // List of symbols used in stubs |
| 1976 symbol_list symbols; |
| 1977 }; |
| 1978 |
| 1979 // A class to handle the PLT data. |
| 1980 |
| 1981 template<int size, bool big_endian> |
| 1982 class Mips_output_data_plt : public Output_section_data |
| 1983 { |
| 1984 public: |
| 1985 typedef Output_data_reloc<elfcpp::SHT_REL, true, |
| 1986 size, big_endian> Reloc_section; |
| 1987 |
| 1988 Mips_output_data_plt(Layout*, Output_data_space*); |
| 1989 |
| 1990 // Add an entry to the PLT. |
| 1991 void add_entry(Symbol* gsym); |
| 1992 |
| 1993 // Return the .rel.plt section data. |
| 1994 const Reloc_section* rel_plt() const |
| 1995 { return this->rel_; } |
| 1996 |
| 1997 // Return the number of PLT entries. |
| 1998 unsigned int |
| 1999 entry_count() const |
| 2000 { return this->count_; } |
| 2001 |
| 2002 // Return the offset of the first non-reserved PLT entry. |
| 2003 static unsigned int |
| 2004 first_plt_entry_offset() |
| 2005 { return sizeof(first_plt_entry[0]); } |
| 2006 |
| 2007 // Return the size of a PLT entry. |
| 2008 static unsigned int |
| 2009 plt_entry_size() |
| 2010 { return sizeof(plt_entry); } |
| 2011 |
| 2012 protected: |
| 2013 void do_adjust_output_section(Output_section* os); |
| 2014 |
| 2015 // Write to a map file. |
| 2016 void |
| 2017 do_print_to_mapfile(Mapfile* mapfile) const |
| 2018 { mapfile->print_output_data(this, _(".plt")); } |
| 2019 |
| 2020 private: |
| 2021 // Template for the first PLT entry. |
| 2022 static const uint32_t first_plt_entry[3][8]; |
| 2023 |
| 2024 // Template for subsequent PLT entries. |
| 2025 static const uint32_t plt_entry[4]; |
| 2026 |
| 2027 // Set the final size. |
| 2028 void |
| 2029 set_final_data_size() |
| 2030 { |
| 2031 unsigned int full_count = this->count_ * 4 + 8; |
| 2032 |
| 2033 this->set_data_size(full_count * 4); |
| 2034 } |
| 2035 |
| 2036 // MIPS abi types |
| 2037 enum Abi_type |
| 2038 { |
| 2039 MIPS_ABI_ERROR = -1, // Error when getting ABI type |
| 2040 MIPS_O32 = 0, // Mips O32 ABI |
| 2041 MIPS_N32 = 1, // Mips N32 ABI |
| 2042 MIPS_N64 = 2, // Mips N64 ABI |
| 2043 MIPS_O64 = 3, // Mips O64 ABI |
| 2044 MIPS_EABI32 = 4, // Mips 32 EABI |
| 2045 MIPS_EABI64 = 5, // Mips 64 EABI |
| 2046 }; |
| 2047 |
| 2048 // Get MIPS abi |
| 2049 Abi_type |
| 2050 abi(elfcpp::Elf_Word /*flags*/) const |
| 2051 { |
| 2052 #if 0 |
| 2053 // MIPS ABI2 |
| 2054 if ((flags & elfcpp::EF_MIPS_ABI2) != 0) |
| 2055 { |
| 2056 switch (flags & elfcpp::EF_MIPS_ABI) |
| 2057 { |
| 2058 case elfcpp::E_MIPS_ABI_O32: |
| 2059 return MIPS_N32; |
| 2060 case elfcpp::E_MIPS_ABI_O64: |
| 2061 return MIPS_N64; |
| 2062 case elfcpp::E_MIPS_ABI_EABI32: |
| 2063 return MIPS_EABI32; // TODO AS: Check if this is correct!!!! |
| 2064 case elfcpp::E_MIPS_ABI_EABI64: |
| 2065 return MIPS_EABI64; // TODO AS: Check if this is correct!!!! |
| 2066 default: |
| 2067 return MIPS_ABI_ERROR; |
| 2068 } |
| 2069 } |
| 2070 else |
| 2071 { |
| 2072 switch (flags & elfcpp::EF_MIPS_ABI) |
| 2073 { |
| 2074 case elfcpp::E_MIPS_ABI_O32: |
| 2075 return MIPS_O32; |
| 2076 case elfcpp::E_MIPS_ABI_O64: |
| 2077 return MIPS_O64; |
| 2078 case elfcpp::E_MIPS_ABI_EABI32: |
| 2079 return MIPS_EABI32; // TODO AS: Check if this is correct!!!! |
| 2080 case elfcpp:: E_MIPS_ABI_EABI64: |
| 2081 return MIPS_EABI64; // TODO AS: Check if this is correct!!!! |
| 2082 default: |
| 2083 return MIPS_ABI_ERROR; |
| 2084 } |
| 2085 } |
| 2086 #endif |
| 2087 // TODO AS: For now only support O32 ABI |
| 2088 return MIPS_O32; |
| 2089 } |
| 2090 |
| 2091 // Write out the PLT data. |
| 2092 void |
| 2093 do_write(Output_file*); |
| 2094 |
| 2095 // The reloc section. |
| 2096 Reloc_section* rel_; |
| 2097 // The .got.plt section. |
| 2098 Output_data_space* got_plt_; |
| 2099 // The number of PLT entries. |
| 2100 unsigned int count_; |
| 2101 }; |
| 2102 |
| 2103 // A class to handle the .MIPS.stubs data. |
| 2104 |
| 2105 template<int size, bool big_endian> |
| 2106 class Mips_output_data_mips_stubs : public Output_section_data |
| 2107 { |
| 2108 public: |
| 2109 Mips_output_data_mips_stubs(Layout* layout, |
| 2110 Mips_output_data_got<size, big_endian>* got, Sized_symbol<size>* gp) |
| 2111 : Output_section_data(size == 32 ? 4 : 8), count_(1), got_(got), gp_(gp), |
| 2112 layout_(layout), big_dyn_symtab_(false) |
| 2113 { }; |
| 2114 |
| 2115 // Add an entry to the .MIPS.stubs. |
| 2116 void add_entry(Symbol* gsym); |
| 2117 |
| 2118 // Return the number of .MIPS.stubs entries. |
| 2119 unsigned int |
| 2120 entry_count() const |
| 2121 { return this->count_; } |
| 2122 |
| 2123 // Return if symbol is in .plt |
| 2124 bool |
| 2125 is_plt_symbol(Sized_symbol<size> *sym) |
| 2126 { |
| 2127 if (this->symbols_.size() == 0) |
| 2128 return true; |
| 2129 |
| 2130 return (this->symbols_.count(sym) == 0); |
| 2131 } |
| 2132 |
| 2133 // Remove symbol that should not have entry. |
| 2134 void |
| 2135 remove(Symbol *sym) |
| 2136 { |
| 2137 if (this->symbols_.size() == 0) |
| 2138 return; |
| 2139 |
| 2140 if (this->symbols_.count(sym) == 0) |
| 2141 return; |
| 2142 |
| 2143 this->symbols_.erase(sym); |
| 2144 --this->count_; |
| 2145 } |
| 2146 |
| 2147 // Set if dynamic symbole table has more then 0x10000 entries. |
| 2148 void |
| 2149 set_big_dyn_symtab(bool big_dyn_symtab) |
| 2150 { big_dyn_symtab_ = big_dyn_symtab; } |
| 2151 |
| 2152 // If dynamic symbole table has more then 0x10000 entries. |
| 2153 bool |
| 2154 big_dyn_symtab() |
| 2155 { return this->big_dyn_symtab_; } |
| 2156 |
| 2157 // Fix values of used symbols in symbol table. |
| 2158 void |
| 2159 fix_symbol_values(); |
| 2160 |
| 2161 protected: |
| 2162 void do_adjust_output_section(Output_section* os); |
| 2163 |
| 2164 // Write to a map file. |
| 2165 void |
| 2166 do_print_to_mapfile(Mapfile* mapfile) const |
| 2167 { mapfile->print_output_data(this, _(".MIPS.stubs")); } |
| 2168 |
| 2169 private: |
| 2170 // Template for the .MIPS.stubs instructions. |
| 2171 // lw t9, .got offset from _gp |
| 2172 unsigned long |
| 2173 stub_lw() |
| 2174 { return 0x8f990000 | ((this->got_->address() - this->gp_->value()) & 0xffff)
; } |
| 2175 |
| 2176 // addu t7,ra |
| 2177 unsigned long |
| 2178 stub_move() |
| 2179 { return 0x03e07821; } |
| 2180 |
| 2181 // lui t8,val |
| 2182 unsigned long |
| 2183 stub_lui(int val) |
| 2184 { return (0x3c180000 + (val & 0xffff)); } |
| 2185 |
| 2186 //jalr t9,ra |
| 2187 unsigned long |
| 2188 stub_jalr() |
| 2189 { return 0x0320f809; } |
| 2190 |
| 2191 // ori t8,t8,val |
| 2192 unsigned long |
| 2193 stub_ori(int val) |
| 2194 { return (0x37180000 + (val & 0xffff)); } |
| 2195 |
| 2196 // ori t8,zero,val unsigned |
| 2197 unsigned long |
| 2198 stub_li16u(int val) |
| 2199 { return (0x34180000 + (val & 0xffff)); } |
| 2200 |
| 2201 // addiu t8,zero,val sign extended |
| 2202 unsigned long |
| 2203 stub_li16s(int val) |
| 2204 { return (0x24180000 + (val & 0xffff)); } |
| 2205 |
| 2206 // Set the final size. |
| 2207 void |
| 2208 set_final_data_size() |
| 2209 { |
| 2210 unsigned int full_count = this->count_ * (this->big_dyn_symtab_ ? 5 : 4); |
| 2211 |
| 2212 this->set_data_size(full_count * 4); |
| 2213 } |
| 2214 |
| 2215 // Write out the .MIPS.stubs data. |
| 2216 void |
| 2217 do_write(Output_file*); |
| 2218 |
| 2219 // The number of .MIPS.stubs entries. |
| 2220 unsigned int count_; |
| 2221 // .got section |
| 2222 Mips_output_data_got<size, big_endian>* got_; |
| 2223 // _gp symbol |
| 2224 Sized_symbol<size>* gp_; |
| 2225 // Layout |
| 2226 Layout* layout_; |
| 2227 // Set if dynamic symbol table has more then 0x10000 entries. |
| 2228 bool big_dyn_symtab_; |
| 2229 // .MIPS.stubs symbols |
| 2230 std::set<Symbol *> symbols_; |
| 2231 }; |
| 2232 |
| 2233 template<int size, bool big_endian> |
| 2234 void |
| 2235 Mips_output_data_mips_stubs<size, big_endian>::do_adjust_output_section( |
| 2236 Output_section* os) |
| 2237 { os->set_entsize(0); } |
| 2238 |
| 2239 // Add an entry to the .MIPS.stubs. |
| 2240 |
| 2241 template<int size, bool big_endian> |
| 2242 void |
| 2243 Mips_output_data_mips_stubs<size, big_endian>::add_entry(Symbol* sym) |
| 2244 { |
| 2245 gold_assert(!sym->has_plt_offset()); |
| 2246 sym->set_plt_offset(0*this->count_); |
| 2247 |
| 2248 this->symbols_.insert(sym); |
| 2249 |
| 2250 sym->set_needs_dynsym_entry(); |
| 2251 ++this->count_; |
| 2252 } |
| 2253 |
| 2254 // Fix values of used symbols in symbol table. |
| 2255 template<int size, bool big_endian> |
| 2256 void |
| 2257 Mips_output_data_mips_stubs<size, big_endian>::fix_symbol_values() |
| 2258 { |
| 2259 int i = 0; |
| 2260 for (std::set<Symbol *>::const_iterator p = this->symbols_.begin(); |
| 2261 p != this->symbols_.end(); ++p, i++) |
| 2262 { |
| 2263 Sized_symbol<size> *sym = static_cast<Sized_symbol<size>*> (*p); |
| 2264 elfcpp::Elf_Xword value = this->address() + i |
| 2265 * (this->big_dyn_symtab_ ? 20 : 16); |
| 2266 sym->set_value(value); |
| 2267 } |
| 2268 } |
| 2269 |
| 2270 // Write out the .MIPS.stubs. This uses the hand-coded instructions and |
| 2271 // adjusts them as needed. |
| 2272 |
| 2273 template<int size, bool big_endian> |
| 2274 void |
| 2275 Mips_output_data_mips_stubs<size, big_endian>::do_write(Output_file* of) |
| 2276 { |
| 2277 typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; |
| 2278 |
| 2279 // Read processor-specific flags in ELF file header. |
| 2280 const unsigned char* pehdr = of->get_output_view(elfcpp::file_header_offset, |
| 2281 elfcpp::Elf_sizes<size>::ehdr_size); |
| 2282 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 2283 |
| 2284 const off_t offset = this->offset(); |
| 2285 const section_size_type oview_size = |
| 2286 convert_to_section_size_type(this->data_size()) + |
| 2287 (this->big_dyn_symtab_ * (this->symbols_.size() + 1) * 4); |
| 2288 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 2289 |
| 2290 unsigned char* pov = oview; |
| 2291 |
| 2292 for (std::set<Symbol *>::const_iterator p = this->symbols_.begin(); |
| 2293 p != this->symbols_.end(); ++p) |
| 2294 { |
| 2295 // Fill the stub. |
| 2296 uint32_t stub_insn0 = stub_lw(); |
| 2297 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn0); |
| 2298 pov += 4; |
| 2299 uint32_t stub_insn1 = stub_move(); |
| 2300 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn1); |
| 2301 pov += 4; |
| 2302 if (this->big_dyn_symtab_) |
| 2303 { |
| 2304 uint32_t stub_insn2 = stub_lui(((*p)->dynsym_index() >> 16) & 0x7fff); |
| 2305 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn2); |
| 2306 pov += 4; |
| 2307 } |
| 2308 uint32_t stub_insn3 = stub_jalr(); |
| 2309 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn3); |
| 2310 pov += 4; |
| 2311 if (this->big_dyn_symtab_) |
| 2312 { |
| 2313 uint32_t stub_insn4 = stub_ori((*p)->dynsym_index() & 0xffff); |
| 2314 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn4); |
| 2315 } |
| 2316 else if ((*p)->dynsym_index() & ~0x7fff) |
| 2317 { |
| 2318 uint32_t stub_insn5 = stub_li16u((*p)->dynsym_index() & 0xffff); |
| 2319 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn5); |
| 2320 } |
| 2321 else |
| 2322 { |
| 2323 uint32_t stub_insn6 = stub_li16s((*p)->dynsym_index()); |
| 2324 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn6); |
| 2325 } |
| 2326 pov += 4; |
| 2327 } |
| 2328 |
| 2329 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2330 pov += 4; |
| 2331 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2332 pov += 4; |
| 2333 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2334 pov += 4; |
| 2335 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2336 pov += 4; |
| 2337 |
| 2338 if (this->big_dyn_symtab_) |
| 2339 { |
| 2340 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2341 pov += 4; |
| 2342 } |
| 2343 |
| 2344 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
| 2345 |
| 2346 of->write_output_view(offset, oview_size, oview); |
| 2347 } |
| 2348 |
| 2349 // Create the PLT section. The ordinary .got section is an argument, |
| 2350 // since we need to refer to the start. |
| 2351 |
| 2352 template<int size, bool big_endian> |
| 2353 Mips_output_data_plt<size, big_endian>::Mips_output_data_plt(Layout* layout, |
| 2354 Output_data_space* got_plt) |
| 2355 : Output_section_data(size == 32 ? 4 : 8), got_plt_(got_plt), count_(0) |
| 2356 { |
| 2357 this->rel_ = new Reloc_section(false); |
| 2358 layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL, |
| 2359 elfcpp::SHF_ALLOC, this->rel_, |
| 2360 ORDER_DYNAMIC_PLT_RELOCS, false); |
| 2361 } |
| 2362 |
| 2363 template<int size, bool big_endian> |
| 2364 void |
| 2365 Mips_output_data_plt<size, big_endian>::do_adjust_output_section( |
| 2366 Output_section* os) |
| 2367 { os->set_entsize(0); } |
| 2368 |
| 2369 // Add an entry to the PLT. |
| 2370 |
| 2371 template<int size, bool big_endian> |
| 2372 void |
| 2373 Mips_output_data_plt<size, big_endian>::add_entry(Symbol* gsym) |
| 2374 { |
| 2375 gold_assert(!gsym->has_plt_offset()); |
| 2376 section_offset_type plt_offset = (this->count_) * sizeof(plt_entry) |
| 2377 + sizeof(first_plt_entry[0]); |
| 2378 gsym->set_plt_offset(plt_offset); |
| 2379 |
| 2380 ++this->count_; |
| 2381 |
| 2382 section_offset_type got_offset = this->got_plt_->current_data_size(); |
| 2383 |
| 2384 // Every PLT entry needs a GOT entry which points back to the PLT |
| 2385 // entry (this will be changed by the dynamic linker, normally |
| 2386 // lazily when the function is called). |
| 2387 this->got_plt_->set_current_data_size(got_offset + 4); |
| 2388 |
| 2389 gsym->set_needs_dynsym_entry(); |
| 2390 this->rel_->add_global(gsym, elfcpp::R_MIPS_JUMP_SLOT, this->got_plt_, |
| 2391 got_offset); |
| 2392 } |
| 2393 |
| 2394 // Mips PLTs. |
| 2395 |
| 2396 // The first entry in the PLT. |
| 2397 |
| 2398 template<int size, bool big_endian> |
| 2399 const uint32_t Mips_output_data_plt<size, big_endian>::first_plt_entry[3][8] = |
| 2400 { |
| 2401 // The format of the first PLT entry in an O32 executable. |
| 2402 { |
| 2403 0x3c1c0000, // lui $28, %hi(&GOTPLT[0]) |
| 2404 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28) |
| 2405 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0]) |
| 2406 0x031cc023, // subu $24, $24, $28 |
| 2407 0x03e07821, // move $15, $31 |
| 2408 0x0018c082, // srl $24, $24, 2 |
| 2409 0x0320f809, // jalr $25 |
| 2410 0x2718fffe // subu $24, $24, 2 |
| 2411 }, |
| 2412 |
| 2413 // The format of the first PLT entry in an N32 executable. Different |
| 2414 // because gp ($28) is not available; we use t2 ($14) instead. |
| 2415 { |
| 2416 0x3c0e0000, // lui $14, %hi(&GOTPLT[0]) |
| 2417 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14) |
| 2418 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0]) |
| 2419 0x030ec023, // subu $24, $24, $14 |
| 2420 0x03e07821, // move $15, $31 |
| 2421 0x0018c082, // srl $24, $24, 2 |
| 2422 0x0320f809, // jalr $25 |
| 2423 0x2718fffe // subu $24, $24, 2 |
| 2424 }, |
| 2425 |
| 2426 // The format of the first PLT entry in an N64 executable. Different |
| 2427 // from N32 because of the increased size of GOT entries. |
| 2428 { |
| 2429 0x3c0e0000, // lui $14, %hi(&GOTPLT[0]) |
| 2430 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14) |
| 2431 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0]) |
| 2432 0x030ec023, // subu $24, $24, $14 |
| 2433 0x03e07821, // move $15, $31 |
| 2434 0x0018c0c2, // srl $24, $24, 3 |
| 2435 0x0320f809, // jalr $25 |
| 2436 0x2718fffe // subu $24, $24, 2 |
| 2437 } |
| 2438 }; |
| 2439 |
| 2440 // Subsequent entries in the PLT. |
| 2441 |
| 2442 template<int size, bool big_endian> |
| 2443 const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry[4] = |
| 2444 { |
| 2445 0x3c0f0000, // lui $15, %hi(.got.plt entry) |
| 2446 0x8df90000, // l[wd] $25, %lo(.got.plt entry)($15) |
| 2447 0x03200008, // jr $25 |
| 2448 0x25f80000 // addiu $24, $15, %lo(.got.plt entry) |
| 2449 }; |
| 2450 |
| 2451 // Write out the PLT. This uses the hand-coded instructions above, |
| 2452 // and adjusts them as needed. |
| 2453 |
| 2454 template<int size, bool big_endian> |
| 2455 void |
| 2456 Mips_output_data_plt<size, big_endian>::do_write(Output_file* of) |
| 2457 { |
| 2458 typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; |
| 2459 |
| 2460 // Read processor-specific flags in ELF file header. |
| 2461 const unsigned char* pehdr = of->get_output_view(elfcpp::file_header_offset, |
| 2462 elfcpp::Elf_sizes<size>::ehdr_size); |
| 2463 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 2464 const size_t abi = this->abi(ehdr.get_e_flags()); |
| 2465 |
| 2466 const off_t offset = this->offset(); |
| 2467 const section_size_type oview_size = |
| 2468 convert_to_section_size_type(this->data_size()); |
| 2469 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 2470 |
| 2471 const off_t got_file_offset = this->got_plt_->offset(); |
| 2472 const section_size_type got_size = |
| 2473 convert_to_section_size_type(this->got_plt_->data_size()); |
| 2474 unsigned char* const got_view = of->get_output_view(got_file_offset, |
| 2475 got_size); |
| 2476 unsigned char* pov = oview; |
| 2477 |
| 2478 Mips_address plt_address = this->address(); |
| 2479 Mips_address got_address = this->got_plt_->address(); |
| 2480 |
| 2481 uint32_t plt_insn0 = first_plt_entry[abi][0] | (((got_address + 0x8000) >> 16)
& 0xffff); |
| 2482 elfcpp::Swap<32, big_endian>::writeval(pov, plt_insn0); |
| 2483 uint32_t plt_insn1 = first_plt_entry[abi][1] | (got_address & 0xffff); |
| 2484 elfcpp::Swap<32, big_endian>::writeval(pov + 4, plt_insn1); |
| 2485 uint32_t plt_insn2 = first_plt_entry[abi][2] | (got_address & 0xffff); |
| 2486 elfcpp::Swap<32, big_endian>::writeval(pov + 8, plt_insn2); |
| 2487 |
| 2488 for (size_t i = 3; i < 8; i++) |
| 2489 elfcpp::Swap<32, big_endian>::writeval(pov + i * 4, |
| 2490 first_plt_entry[abi][i]); |
| 2491 |
| 2492 pov += sizeof(first_plt_entry[abi]); |
| 2493 |
| 2494 unsigned char* got_pov = got_view; |
| 2495 |
| 2496 memset(got_pov, 0, 8); |
| 2497 got_pov += 8; |
| 2498 |
| 2499 const int rel_size = elfcpp::Elf_sizes<32>::rel_size; |
| 2500 unsigned int plt_offset = sizeof(first_plt_entry[abi]); |
| 2501 unsigned int plt_rel_offset = 0; |
| 2502 unsigned int got_offset = 8; |
| 2503 const unsigned int count = this->count_; |
| 2504 for (unsigned int i = 0; |
| 2505 i < count; |
| 2506 ++i, |
| 2507 pov += sizeof(plt_entry), |
| 2508 got_pov += 4, |
| 2509 plt_offset += sizeof(plt_entry), |
| 2510 plt_rel_offset += rel_size, |
| 2511 got_offset += 4) |
| 2512 { |
| 2513 // Set and adjust the PLT entry itself. |
| 2514 int32_t offset = (got_address + got_offset); |
| 2515 |
| 2516 uint32_t plt_insn0 = plt_entry[0] | (((offset + 0x8000) >> 16) & 0xffff); |
| 2517 elfcpp::Swap<32, big_endian>::writeval(pov, plt_insn0); |
| 2518 uint32_t plt_insn1 = plt_entry[1] | (offset & 0xffff); |
| 2519 elfcpp::Swap<32, big_endian>::writeval(pov + 4, plt_insn1); |
| 2520 uint32_t plt_insn2 = plt_entry[2]; |
| 2521 elfcpp::Swap<32, big_endian>::writeval(pov + 8, plt_insn2); |
| 2522 uint32_t plt_insn3 = plt_entry[3] | (offset & 0xffff); |
| 2523 elfcpp::Swap<32, big_endian>::writeval(pov + 12, plt_insn3); |
| 2524 |
| 2525 // Set the entry in the GOT. |
| 2526 elfcpp::Swap<32, big_endian>::writeval(got_pov, plt_address); |
| 2527 } |
| 2528 |
| 2529 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
| 2530 gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size); |
| 2531 |
| 2532 of->write_output_view(offset, oview_size, oview); |
| 2533 of->write_output_view(got_file_offset, got_size, got_view); |
| 2534 } |
| 2535 |
| 2536 // Create a GOT entry for the TLS module index. |
| 2537 |
| 2538 template<int size, bool big_endian> |
| 2539 unsigned int |
| 2540 Target_mips<size, big_endian>::got_mod_index_entry( |
| 2541 Symbol_table* symtab, |
| 2542 Layout* layout, |
| 2543 Sized_relobj_file<size, big_endian>* object) |
| 2544 { |
| 2545 if (this->got_mod_index_offset_ == -1U) |
| 2546 { |
| 2547 gold_assert(symtab != NULL && layout != NULL && object != NULL); |
| 2548 Mips_output_data_got<size, big_endian>* got = |
| 2549 this->got_section(symtab, layout); |
| 2550 unsigned int got_offset; |
| 2551 if (!parameters->doing_static_link()) |
| 2552 { |
| 2553 got_offset = got->add_constant(0); |
| 2554 |
| 2555 Reloc_section* rel_dyn = this->rel_dyn_section(layout); |
| 2556 rel_dyn->add_local(object, 0, |
| 2557 size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 : |
| 2558 elfcpp::R_MIPS_TLS_DTPMOD64, got, |
| 2559 got_offset); |
| 2560 } |
| 2561 else |
| 2562 { |
| 2563 // We are doing a static link. Just mark it as belong to module 1, |
| 2564 // the executable. |
| 2565 got_offset = got->add_constant(1); |
| 2566 } |
| 2567 |
| 2568 got->add_constant(0); |
| 2569 this->got_mod_index_offset_ = got_offset; |
| 2570 } |
| 2571 |
| 2572 return this->got_mod_index_offset_; |
| 2573 } |
| 2574 |
| 2575 // Create a PLT entry for a global symbol. |
| 2576 |
| 2577 template<int size, bool big_endian> |
| 2578 void |
| 2579 Target_mips<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
| 2580 Layout* layout, |
| 2581 Symbol* gsym) |
| 2582 { |
| 2583 if (gsym->has_plt_offset()) |
| 2584 return; |
| 2585 |
| 2586 if (this->plt_ == NULL) |
| 2587 { |
| 2588 // Create the GOT section first. |
| 2589 this->got_section(symtab, layout); |
| 2590 |
| 2591 // Create .rel.dyn section. |
| 2592 this->rel_dyn_section(layout); |
| 2593 |
| 2594 layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, |
| 2595 (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), |
| 2596 this->got_plt_, ORDER_DATA, false); |
| 2597 |
| 2598 // The first two entries are reserved. |
| 2599 this->got_plt_->set_current_data_size(2 * 4); |
| 2600 |
| 2601 this->plt_ = new Mips_output_data_plt<size, big_endian>(layout, |
| 2602 this->got_plt_); |
| 2603 layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, |
| 2604 (elfcpp::SHF_ALLOC |
| 2605 | elfcpp::SHF_EXECINSTR), |
| 2606 this->plt_, ORDER_PLT, false); |
| 2607 |
| 2608 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. |
| 2609 symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, |
| 2610 Symbol_table::PREDEFINED, |
| 2611 this->plt_, |
| 2612 0, 0, elfcpp::STT_FUNC, |
| 2613 elfcpp::STB_LOCAL, |
| 2614 elfcpp::STV_DEFAULT, 0, |
| 2615 false, false); |
| 2616 } |
| 2617 |
| 2618 this->plt_->add_entry(gsym); |
| 2619 } |
| 2620 |
| 2621 |
| 2622 // Create a .MIPS.stubs entry for a global symbol. |
| 2623 |
| 2624 template<int size, bool big_endian> |
| 2625 void |
| 2626 Target_mips<size, big_endian>::make_mips_stubs_entry(Symbol_table* symtab, |
| 2627 Layout* layout, |
| 2628 Symbol* gsym) |
| 2629 { |
| 2630 if (gsym->has_plt_offset()) |
| 2631 return; |
| 2632 |
| 2633 if (this->mips_stubs_ == NULL) |
| 2634 { |
| 2635 // Create the .MIPS.stubs section first. |
| 2636 |
| 2637 this->mips_stubs_ = new Mips_output_data_mips_stubs<size, big_endian> |
| 2638 (layout, this->got_section(symtab, layout), this->gp_); |
| 2639 |
| 2640 layout->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS, |
| 2641 (elfcpp::SHF_ALLOC |
| 2642 | elfcpp::SHF_EXECINSTR), |
| 2643 this->mips_stubs_, ORDER_PLT, false); |
| 2644 } |
| 2645 this->mips_stubs_->add_entry(gsym); |
| 2646 } |
| 2647 |
| 2648 template<int size, bool big_endian> |
| 2649 Mips_output_data_stub<size, big_endian>::Mips_output_data_stub() |
| 2650 : Output_section_data(size == 32 ? 4 : 8), count_(0) |
| 2651 {} |
| 2652 |
| 2653 template<int size, bool big_endian> |
| 2654 void |
| 2655 Mips_output_data_stub<size, big_endian>::do_adjust_output_section( |
| 2656 Output_section* os) |
| 2657 { |
| 2658 os->set_entsize(0); |
| 2659 } |
| 2660 |
| 2661 // Add an entry to the STUB. |
| 2662 |
| 2663 template<int size, bool big_endian> |
| 2664 void |
| 2665 Mips_output_data_stub<size, big_endian>::add_entry(Symbol_table* symtab, |
| 2666 Target_mips<size, big_endian>
* target, |
| 2667 Symbol* gsym) |
| 2668 { |
| 2669 Symbol* sym; |
| 2670 char* buffer = new char[strlen(gsym->name()) + 6]; |
| 2671 gold_assert(buffer != NULL); |
| 2672 |
| 2673 section_offset_type stub_offset = this->count_ * 4 * 4; |
| 2674 |
| 2675 ++this->count_; |
| 2676 |
| 2677 sprintf(buffer, ".pic.%s", gsym->name()); |
| 2678 |
| 2679 sym = symtab->define_in_output_data(buffer, NULL, |
| 2680 Symbol_table::PREDEFINED, |
| 2681 target->stub(), |
| 2682 stub_offset, 0x10, elfcpp::STT_FUNC, |
| 2683 elfcpp::STB_GLOBAL, |
| 2684 elfcpp::STV_DEFAULT, 0, |
| 2685 false, false); |
| 2686 |
| 2687 target->add_stub_symbol(gsym->name(), sym); |
| 2688 this->add_symbol(gsym); |
| 2689 |
| 2690 delete [] buffer; |
| 2691 } |
| 2692 |
| 2693 |
| 2694 // Create a STUB entry for a global symbol. |
| 2695 |
| 2696 template<int size, bool big_endian> |
| 2697 void |
| 2698 Target_mips<size, big_endian>::make_stub_entry(Layout* layout) |
| 2699 { |
| 2700 if (this->stub_ == NULL) |
| 2701 { |
| 2702 this->stub_ = new Mips_output_data_stub<size, big_endian>(); |
| 2703 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
| 2704 (elfcpp::SHF_ALLOC |
| 2705 | elfcpp::SHF_EXECINSTR |
| 2706 | elfcpp::SHF_WRITE), |
| 2707 this->stub_, ORDER_TEXT, false); |
| 2708 } |
| 2709 } |
| 2710 |
| 2711 template<int size, bool big_endian> |
| 2712 const uint32_t Mips_output_data_stub<size, big_endian>::stub_entry[4] = |
| 2713 { |
| 2714 0x3c190000, // lui $25, %hi(func) |
| 2715 0x08000000, // j func |
| 2716 0x27390000, // add $25, $25, %lo(func) |
| 2717 0x00000000 // nop |
| 2718 }; |
| 2719 |
| 2720 // Write out the STUB. This uses the hand-coded instructions above, |
| 2721 // and adjusts them as needed. |
| 2722 |
| 2723 template<int size, bool big_endian> |
| 2724 void |
| 2725 Mips_output_data_stub<size, big_endian>::do_write(Output_file* of) |
| 2726 { |
| 2727 typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; |
| 2728 |
| 2729 const off_t offset = this->offset(); |
| 2730 const section_size_type oview_size = |
| 2731 convert_to_section_size_type(this->data_size()); |
| 2732 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 2733 |
| 2734 unsigned char* pov = oview; |
| 2735 |
| 2736 const unsigned int count = this->count_; |
| 2737 for (unsigned int i = 0; |
| 2738 i < count; |
| 2739 ++i, |
| 2740 pov += 4*4) |
| 2741 { |
| 2742 Sized_symbol<size> *sym = static_cast<Sized_symbol<size>*> |
| 2743 (this->symbol(i)); |
| 2744 |
| 2745 unsigned int value = (unsigned int)sym->value(); |
| 2746 gold_assert(offset >= 0 && offset < 0x0fffffff); |
| 2747 uint32_t stub_insn0 = stub_entry[0] | (((value + 0x8000) >> 16) & 0xffff); |
| 2748 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn0); |
| 2749 uint32_t stub_insn1 = stub_entry[1] | (((value >> 2) & 0x03ffffff)); |
| 2750 elfcpp::Swap<32, big_endian>::writeval(pov + 4, stub_insn1); |
| 2751 uint32_t stub_insn2 = stub_entry[2] | ((value & 0x0000ffff)); |
| 2752 elfcpp::Swap<32, big_endian>::writeval(pov + 8, stub_insn2); |
| 2753 uint32_t stub_insn3 = stub_entry[3]; |
| 2754 elfcpp::Swap<32, big_endian>::writeval(pov + 12, stub_insn3); |
| 2755 } |
| 2756 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
| 2757 |
| 2758 of->write_output_view(offset, oview_size, oview); |
| 2759 } |
| 2760 |
| 2761 // Process the relocations to determine unreferenced sections for |
| 2762 // garbage collection. |
| 2763 |
| 2764 template<int size, bool big_endian> |
| 2765 void |
| 2766 Target_mips<size, big_endian>::gc_process_relocs( |
| 2767 Symbol_table* symtab, |
| 2768 Layout* layout, |
| 2769 Sized_relobj_file<size, big_endian>* object, |
| 2770 unsigned int data_shndx, |
| 2771 unsigned int, |
| 2772 const unsigned char* prelocs, |
| 2773 size_t reloc_count, |
| 2774 Output_section* output_section, |
| 2775 bool needs_special_offset_handling, |
| 2776 size_t local_symbol_count, |
| 2777 const unsigned char* plocal_symbols) |
| 2778 { |
| 2779 typedef Target_mips<size, big_endian> Mips; |
| 2780 typedef typename Target_mips<size, big_endian>::Scan Scan; |
| 2781 |
| 2782 gold::gc_process_relocs<size, big_endian, Mips, elfcpp::SHT_REL, Scan, |
| 2783 typename Target_mips::Relocatable_size_for_reloc>( |
| 2784 symtab, |
| 2785 layout, |
| 2786 this, |
| 2787 object, |
| 2788 data_shndx, |
| 2789 prelocs, |
| 2790 reloc_count, |
| 2791 output_section, |
| 2792 needs_special_offset_handling, |
| 2793 local_symbol_count, |
| 2794 plocal_symbols); |
| 2795 } |
| 2796 |
| 2797 // Scan the relocations to look for symbol adjustments. |
| 2798 |
| 2799 template<int size, bool big_endian> |
| 2800 void |
| 2801 Target_mips<size, big_endian>::scan_relocs( |
| 2802 Symbol_table* symtab, |
| 2803 Layout* layout, |
| 2804 Sized_relobj_file<size, big_endian>* object, |
| 2805 unsigned int data_shndx, |
| 2806 unsigned int sh_type, |
| 2807 const unsigned char* prelocs, |
| 2808 size_t reloc_count, |
| 2809 Output_section* output_section, |
| 2810 bool needs_special_offset_handling, |
| 2811 size_t local_symbol_count, |
| 2812 const unsigned char* plocal_symbols) |
| 2813 { |
| 2814 typedef Target_mips<size, big_endian> Mips; |
| 2815 typedef typename Target_mips<size, big_endian>::Scan Scan; |
| 2816 |
| 2817 if (sh_type == elfcpp::SHT_REL) |
| 2818 gold::scan_relocs<size, big_endian, Mips, elfcpp::SHT_REL, Scan>( |
| 2819 symtab, |
| 2820 layout, |
| 2821 this, |
| 2822 object, |
| 2823 data_shndx, |
| 2824 prelocs, |
| 2825 reloc_count, |
| 2826 output_section, |
| 2827 needs_special_offset_handling, |
| 2828 local_symbol_count, |
| 2829 plocal_symbols); |
| 2830 else if (sh_type == elfcpp::SHT_RELA) |
| 2831 gold::scan_relocs<size, big_endian, Mips, elfcpp::SHT_RELA, Scan>( |
| 2832 symtab, |
| 2833 layout, |
| 2834 this, |
| 2835 object, |
| 2836 data_shndx, |
| 2837 prelocs, |
| 2838 reloc_count, |
| 2839 output_section, |
| 2840 needs_special_offset_handling, |
| 2841 local_symbol_count, |
| 2842 plocal_symbols); |
| 2843 } |
| 2844 |
| 2845 template<int size, bool big_endian> |
| 2846 bool |
| 2847 Target_mips<size, big_endian>::mips_32bit_flags(elfcpp::Elf_Word flags) |
| 2848 { |
| 2849 return ((flags & elfcpp::EF_MIPS_32BITMODE) != 0 |
| 2850 || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_O32 |
| 2851 || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_EABI32 |
| 2852 || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_1 |
| 2853 || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_2 |
| 2854 || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32 |
| 2855 || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32R2); |
| 2856 } |
| 2857 |
| 2858 template<int size, bool big_endian> |
| 2859 bool |
| 2860 Target_mips<size, big_endian>::mips_mach_extends(elfcpp::Elf_Word base, |
| 2861 elfcpp::Elf_Word extension) |
| 2862 { |
| 2863 unsigned int i; |
| 2864 |
| 2865 if (base == extension) |
| 2866 return true; |
| 2867 |
| 2868 if ((base == elfcpp::E_MIPS_ARCH_32) |
| 2869 && mips_mach_extends(elfcpp::E_MIPS_ARCH_64, extension)) |
| 2870 return true; |
| 2871 |
| 2872 if ((base == elfcpp::E_MIPS_ARCH_32R2) |
| 2873 && mips_mach_extends(elfcpp::E_MIPS_ARCH_64R2, extension)) |
| 2874 return true; |
| 2875 |
| 2876 for (i = 0; i < this->extensions_.size(); i++) |
| 2877 if (extension == this->extensions_[i].second) |
| 2878 { |
| 2879 extension = this->extensions_[i].first; |
| 2880 if (extension == base) |
| 2881 return true; |
| 2882 } |
| 2883 |
| 2884 return false; |
| 2885 } |
| 2886 |
| 2887 template<int size, bool big_endian> |
| 2888 void |
| 2889 Target_mips<size, big_endian>::merge_processor_specific_flags(const char* name, |
| 2890 elfcpp::Elf_Word in_flags) |
| 2891 { |
| 2892 elfcpp::Elf_Word out_flags = this->processor_specific_flags(); |
| 2893 |
| 2894 // If flags are not set yet, just copy them. |
| 2895 if (out_flags == 0) |
| 2896 this->set_processor_specific_flags(in_flags); |
| 2897 else |
| 2898 { |
| 2899 elfcpp::Elf_Word new_flags = out_flags; |
| 2900 new_flags |= in_flags & elfcpp::EF_MIPS_NOREORDER; |
| 2901 |
| 2902 // Check flag compatibility. |
| 2903 in_flags &= ~elfcpp::EF_MIPS_NOREORDER; |
| 2904 out_flags &= ~elfcpp::EF_MIPS_NOREORDER; |
| 2905 |
| 2906 // Some IRIX 6 BSD-compatibility objects have this bit set. It |
| 2907 // doesn't seem to matter. |
| 2908 in_flags &= ~elfcpp::EF_MIPS_XGOT; |
| 2909 out_flags &= ~elfcpp::EF_MIPS_XGOT; |
| 2910 |
| 2911 // MIPSpro generates ucode info in n64 objects. Again, we should |
| 2912 // just be able to ignore this. |
| 2913 in_flags &= ~elfcpp::EF_MIPS_UCODE; |
| 2914 out_flags &= ~elfcpp::EF_MIPS_UCODE; |
| 2915 |
| 2916 if ((in_flags & elfcpp::EF_MIPS_DYNAMIC) != 0) |
| 2917 in_flags |= elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC; |
| 2918 |
| 2919 // Input flags are same as output, do nothing. |
| 2920 if (in_flags == out_flags) |
| 2921 return; |
| 2922 |
| 2923 // TODO AS: If input file has no sections, its flags are not important. |
| 2924 |
| 2925 if (((in_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0) |
| 2926 != ((out_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0)) |
| 2927 gold_warning(_("Linking abicalls files with non-abicalls files.")); |
| 2928 |
| 2929 if (in_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) |
| 2930 new_flags |= elfcpp::EF_MIPS_CPIC; |
| 2931 if (!(in_flags & elfcpp::EF_MIPS_PIC)) |
| 2932 new_flags &= ~elfcpp::EF_MIPS_PIC; |
| 2933 |
| 2934 in_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC); |
| 2935 out_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC); |
| 2936 |
| 2937 // Compare the ISAs. |
| 2938 if (mips_32bit_flags(out_flags) != mips_32bit_flags(in_flags)) |
| 2939 { |
| 2940 gold_error(_("Source object %s is %d-bit, but output is %d-bit"), |
| 2941 name, mips_32bit_flags(in_flags) ? 32 : 64, |
| 2942 mips_32bit_flags(out_flags) ? 32 : 64); |
| 2943 } |
| 2944 else if (!mips_mach_extends(in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MI
PS_MACH), |
| 2945 out_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH))) |
| 2946 { |
| 2947 // Input ISA is not set. Just skip it. |
| 2948 if ((in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH)) == 0); |
| 2949 // ISA is not set yet, do it now. |
| 2950 else if ((out_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH)) ==
0) |
| 2951 new_flags |= in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH |
elfcpp::EF_MIPS_32BITMODE); |
| 2952 // OBFD's ISA isn't the same as, or an extension of, IBFD's. |
| 2953 else if (mips_mach_extends(out_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::E
F_MIPS_MACH), |
| 2954 in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH))) |
| 2955 { |
| 2956 // Copy the architecture info from IBFD to OBFD. Also copy |
| 2957 // the 32-bit flag (if set) so that we continue to recognise |
| 2958 // OBFD as a 32-bit binary. |
| 2959 new_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH); |
| 2960 new_flags |= |
| 2961 in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | elfcpp
::EF_MIPS_32BITMODE); |
| 2962 |
| 2963 // Copy across the ABI flags if OBFD doesn't use them |
| 2964 // and if that was what caused us to treat IBFD as 32-bit. |
| 2965 if ((out_flags & elfcpp::EF_MIPS_ABI) == 0 |
| 2966 && mips_32bit_flags(in_flags) |
| 2967 && !mips_32bit_flags(in_flags & ~elfcpp::EF_MIPS_ABI)) |
| 2968 new_flags |= in_flags & elfcpp::EF_MIPS_ABI; |
| 2969 } |
| 2970 else |
| 2971 { |
| 2972 // The ISAs aren't compatible. |
| 2973 gold_error(_("%s ISA is 0x%x and it is not compatible with current" |
| 2974 " ISA 0x%x"), |
| 2975 name, in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIP
S_MACH), |
| 2976 out_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MAC
H)); |
| 2977 } |
| 2978 } |
| 2979 |
| 2980 in_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | elfcpp::EF_MIPS_
32BITMODE); |
| 2981 out_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | elfcpp::EF_MIPS
_32BITMODE); |
| 2982 |
| 2983 // Compare ABIs. TODO AS: The 64-bit ABI does not use EF_MIPS_ABI. |
| 2984 // But, it does set EI_CLASS differently from any 32-bit ABI. |
| 2985 if ((in_flags & elfcpp::EF_MIPS_ABI) != (out_flags & elfcpp::EF_MIPS_ABI)) |
| 2986 { |
| 2987 // Only error if both are set (to different values). |
| 2988 if ((in_flags & elfcpp::EF_MIPS_ABI) && (out_flags & elfcpp::EF_MIPS_ABI
)) |
| 2989 { |
| 2990 gold_error(_("%s ABI %d is different then current ABI %d"), |
| 2991 name, in_flags & elfcpp::EF_MIPS_ABI, |
| 2992 out_flags & elfcpp::EF_MIPS_ABI); |
| 2993 } |
| 2994 |
| 2995 in_flags &= ~elfcpp::EF_MIPS_ABI; |
| 2996 out_flags &= ~elfcpp::EF_MIPS_ABI; |
| 2997 } |
| 2998 |
| 2999 // Compare ABIs. |
| 3000 if ((in_flags & elfcpp::EF_MIPS_ABI2) != (out_flags & elfcpp::EF_MIPS_ABI2)) |
| 3001 { |
| 3002 gold_error(_("%s is ABI%s while output is ABI%s"), |
| 3003 name, ((in_flags & elfcpp::EF_MIPS_ABI2) ? "2" : ""), |
| 3004 ((out_flags & elfcpp::EF_MIPS_ABI2) ? "2" : "")); |
| 3005 |
| 3006 in_flags &= ~elfcpp::EF_MIPS_ABI2; |
| 3007 out_flags &= ~elfcpp::EF_MIPS_ABI2; |
| 3008 } |
| 3009 |
| 3010 // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together |
| 3011 // and allow arbitrary mixing of the remaining ASEs (retain the union). |
| 3012 if ((in_flags & elfcpp::EF_MIPS_ARCH_ASE) != (out_flags & elfcpp::EF_MIPS_AR
CH_ASE)) |
| 3013 { |
| 3014 int old_micro = out_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS; |
| 3015 int new_micro = in_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS; |
| 3016 int old_m16 = out_flags & elfcpp::EF_MIPS_ARCH_ASE_M16; |
| 3017 int new_m16 = in_flags & elfcpp::EF_MIPS_ARCH_ASE_M16; |
| 3018 int micro_mis = old_m16 && new_micro; |
| 3019 int m16_mis = old_micro && new_m16; |
| 3020 |
| 3021 if (m16_mis || micro_mis) |
| 3022 { |
| 3023 gold_error(_("%s ASE is %s while output ASE is %s"), |
| 3024 name, m16_mis ? "MIPS16" : "microMIPS", |
| 3025 m16_mis ? "microMIPS" : "MIPS16"); |
| 3026 } |
| 3027 |
| 3028 new_flags |= in_flags & elfcpp::EF_MIPS_ARCH_ASE; |
| 3029 |
| 3030 in_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE; |
| 3031 out_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE; |
| 3032 } |
| 3033 |
| 3034 // Warn about any other mismatches |
| 3035 if (in_flags != out_flags) |
| 3036 { |
| 3037 gold_error(_("%s uses different flags 0x%x then output 0x%x"), |
| 3038 name, in_flags, out_flags); |
| 3039 } |
| 3040 |
| 3041 this->set_processor_specific_flags(new_flags); |
| 3042 } |
| 3043 } |
| 3044 |
| 3045 // Finalize the sections. |
| 3046 |
| 3047 template <int size, bool big_endian> |
| 3048 void |
| 3049 Target_mips<size, big_endian>::do_finalize_sections(Layout* layout, |
| 3050 const Input_objects* input_objects, |
| 3051 Symbol_table* symtab) |
| 3052 { |
| 3053 // Add NULL segment. |
| 3054 if (!parameters->options().relocatable()) |
| 3055 layout->make_output_segment(elfcpp::PT_NULL, 0); |
| 3056 |
| 3057 for (Layout::Section_list::const_iterator p = layout->section_list().begin(); |
| 3058 p != layout->section_list().end(); ++p) |
| 3059 if ((*p)->type() == elfcpp::SHT_MIPS_REGINFO) |
| 3060 { |
| 3061 Mips_output_section_reginfo<size>* reginfo = |
| 3062 Mips_output_section_reginfo<size>::as_mips_output_section_reginfo(*p); |
| 3063 |
| 3064 if (this->gp() == NULL) |
| 3065 reginfo->set_gp(0); |
| 3066 else |
| 3067 reginfo->set_gp(this->gp()); |
| 3068 |
| 3069 if (!parameters->options().relocatable()) |
| 3070 { |
| 3071 Output_segment *reginfo_segment = |
| 3072 layout->make_output_segment(elfcpp::PT_MIPS_REGINFO, elfcpp::P
F_R); |
| 3073 reginfo_segment->add_output_section_to_nonload(reginfo, elfcpp::PF
_R); |
| 3074 } |
| 3075 |
| 3076 // There is only one .reginfo section |
| 3077 break; |
| 3078 } |
| 3079 |
| 3080 if (this->got_section()) |
| 3081 { |
| 3082 this->got_section()->add_global_relocs(); |
| 3083 this->got_section()->add_global_tls_relocs(); |
| 3084 } |
| 3085 |
| 3086 // Merge processor-specific flags. |
| 3087 for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); |
| 3088 p != input_objects->relobj_end(); |
| 3089 ++p) |
| 3090 { |
| 3091 Sized_relobj_file<size, big_endian>* relobj = |
| 3092 static_cast<const Sized_relobj_file<size, big_endian>*>(*p); |
| 3093 |
| 3094 Input_file::Format format = relobj->input_file()->format(); |
| 3095 if (format == Input_file::FORMAT_ELF) |
| 3096 { |
| 3097 // Read processor-specific flags in ELF file header. |
| 3098 const unsigned char* pehdr = relobj-> |
| 3099 get_view(elfcpp::file_header_offset, |
| 3100 elfcpp::Elf_sizes<size>::ehdr_size, |
| 3101 true, false); |
| 3102 |
| 3103 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 3104 elfcpp::Elf_Word in_flags = ehdr.get_e_flags(); |
| 3105 |
| 3106 this->merge_processor_specific_flags(relobj->name().c_str(), in_flags)
; |
| 3107 } |
| 3108 } |
| 3109 |
| 3110 for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin(); |
| 3111 p != input_objects->dynobj_end(); |
| 3112 ++p) |
| 3113 { |
| 3114 Sized_dynobj<size, big_endian>* dynobj = |
| 3115 static_cast<const Sized_dynobj<size, big_endian>*>(*p); |
| 3116 |
| 3117 // Read processor-specific flags. |
| 3118 const unsigned char* pehdr = dynobj->get_view(elfcpp::file_header_offset, |
| 3119 elfcpp::Elf_sizes<size>::ehdr_size, |
| 3120 true, false); |
| 3121 |
| 3122 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 3123 elfcpp::Elf_Word in_flags = ehdr.get_e_flags(); |
| 3124 |
| 3125 this->merge_processor_specific_flags(dynobj->name().c_str(), in_flags); |
| 3126 } |
| 3127 |
| 3128 // Fill in some more dynamic tags. |
| 3129 const Reloc_section* rel_plt = (this->plt_ == NULL |
| 3130 ? NULL |
| 3131 : this->plt_->rel_plt()); |
| 3132 layout->add_target_dynamic_tags(true, this->got_, rel_plt, |
| 3133 this->rel_dyn_, true, false); |
| 3134 |
| 3135 Output_data_dynamic* const odyn = layout->dynamic_data(); |
| 3136 if ((odyn) && |
| 3137 (!parameters->options().relocatable() && !parameters->doing_static_link())) |
| 3138 { |
| 3139 // In case there is no .got section, create one. |
| 3140 this->got_section(symtab, layout); |
| 3141 |
| 3142 unsigned int d_val; |
| 3143 // This element holds a 32-bit version id for the Runtime |
| 3144 // Linker Interface. This will start at integer value 1. |
| 3145 d_val = 0x01; |
| 3146 odyn->add_constant(elfcpp::DT_MIPS_RLD_VERSION, d_val); |
| 3147 |
| 3148 // Dynamic flags |
| 3149 d_val = elfcpp::RHF_NOTPOT; |
| 3150 odyn->add_constant(elfcpp::DT_MIPS_FLAGS, d_val); |
| 3151 |
| 3152 // This member holds the base address of the segment. |
| 3153 odyn->add_target_specific(elfcpp::DT_MIPS_BASE_ADDRESS); |
| 3154 |
| 3155 // This member holds the number of entries in the .dynsym section. |
| 3156 odyn->add_target_specific(elfcpp::DT_MIPS_SYMTABNO); |
| 3157 |
| 3158 // This member holds the index of the first dynamic symbol |
| 3159 // table entry that corresponds to an entry in the global offset table. |
| 3160 odyn->add_target_specific(elfcpp::DT_MIPS_GOTSYM); |
| 3161 |
| 3162 // This member holds the number of local global offset table entries. |
| 3163 odyn->add_target_specific(elfcpp::DT_MIPS_LOCAL_GOTNO); |
| 3164 |
| 3165 if (this->plt_ != NULL) |
| 3166 // DT_MIPS_PLTGOT dynamic tag |
| 3167 odyn->add_section_address(elfcpp::DT_MIPS_PLTGOT, this->got_plt_); |
| 3168 } |
| 3169 |
| 3170 // Set the .text section. |
| 3171 this->text_section_ = layout->find_output_section(".text"); |
| 3172 // Set the symbol table |
| 3173 this->symtab_ = symtab; |
| 3174 // Set the layout |
| 3175 this->layout_ = layout; |
| 3176 |
| 3177 // Emit any relocs we saved in an attempt to avoid generating COPY |
| 3178 // relocs. |
| 3179 if (this->copy_relocs_.any_saved_relocs()) |
| 3180 this->copy_relocs_.emit(this->rel_dyn_section(layout)); |
| 3181 |
| 3182 if (this->copy_relocsa_.any_saved_relocs()) |
| 3183 this->copy_relocsa_.emit(this->rela_dyn_section(layout)); |
| 3184 |
| 3185 Target::do_finalize_sections (layout, input_objects, symtab); |
| 3186 } |
| 3187 |
| 3188 // Functor class for processing the global symbol table. Processes the |
| 3189 // index in dynamic section if the symbol has GOT entry, and finds |
| 3190 // minimum index value. |
| 3191 |
| 3192 template<int size, bool big_endian> |
| 3193 class Symbol_visitor_gotsym |
| 3194 { |
| 3195 public: |
| 3196 Symbol_visitor_gotsym() |
| 3197 { } |
| 3198 |
| 3199 void |
| 3200 operator()(const Sized_symbol<size>* sym) |
| 3201 { |
| 3202 if (sym->has_got_offset(0) && sym->needs_dynsym_entry() && sym->dynsym_index
() < this->min_index_) |
| 3203 this->min_index_ = sym->dynsym_index(); |
| 3204 } |
| 3205 |
| 3206 unsigned int min_dynsym_index() |
| 3207 { |
| 3208 return this->min_index_; |
| 3209 } |
| 3210 private: |
| 3211 static unsigned int min_index_; |
| 3212 }; |
| 3213 |
| 3214 template<int size, bool big_endian> |
| 3215 unsigned int Symbol_visitor_gotsym<size, big_endian>::min_index_ = -1U; |
| 3216 |
| 3217 template<int size, bool big_endian> |
| 3218 void |
| 3219 Target_mips<size, big_endian>::do_fix_sections(Layout*, Symbol_table*) |
| 3220 { |
| 3221 Output_section *dynsym = this->layout_->find_output_section(".dynsym"); |
| 3222 |
| 3223 if ((dynsym != NULL) && (this->mips_stubs_ != NULL)) |
| 3224 { |
| 3225 this->mips_stubs_->set_big_dyn_symtab(((unsigned int)dynsym->data_size()/1
6) > 0x10000); |
| 3226 |
| 3227 this->mips_stubs_->fix_symbol_values(); |
| 3228 } |
| 3229 } |
| 3230 |
| 3231 // MIPS specific dynamic tags. |
| 3232 template<int size, bool big_endian> |
| 3233 unsigned int |
| 3234 Target_mips<size, big_endian>::do_dynamic_tag_value(elfcpp::DT tag) const |
| 3235 { |
| 3236 Symbol_table *symtab = this->symtab_; |
| 3237 Layout *layout = this->layout_; |
| 3238 |
| 3239 Output_section *dynsym = layout->find_output_section(".dynsym"); |
| 3240 gold_assert(dynsym != NULL); |
| 3241 |
| 3242 switch (tag) |
| 3243 { |
| 3244 case elfcpp::DT_MIPS_BASE_ADDRESS: |
| 3245 { |
| 3246 typedef std::vector<Output_segment*> Segment_list; |
| 3247 const Segment_list segment_list_ = layout->segment_list(); |
| 3248 unsigned int vaddr = -1U; |
| 3249 for (Segment_list::const_iterator p = segment_list_.begin(); |
| 3250 p != segment_list_.end(); |
| 3251 ++p) |
| 3252 { |
| 3253 if (((*p)->flags() & elfcpp::PF_R) != 0) |
| 3254 { |
| 3255 if ((*p)->vaddr() < vaddr) |
| 3256 vaddr = (*p)->vaddr(); |
| 3257 } |
| 3258 } |
| 3259 return vaddr; |
| 3260 } |
| 3261 case elfcpp::DT_MIPS_SYMTABNO: |
| 3262 return (unsigned int)dynsym->data_size()/16; |
| 3263 case elfcpp::DT_MIPS_GOTSYM: |
| 3264 { |
| 3265 unsigned int min_index = symtab->global_got_index(); |
| 3266 |
| 3267 if (min_index == -1U) |
| 3268 min_index = (unsigned int)dynsym->data_size()/16; |
| 3269 |
| 3270 return min_index; |
| 3271 } |
| 3272 case elfcpp::DT_MIPS_LOCAL_GOTNO: |
| 3273 |
| 3274 return (unsigned int)this->got_->data_size()/4 - |
| 3275 ((unsigned int)dynsym->data_size()/16 - symtab->global_got_index()) - |
| 3276 this->got_->tls_entries(); |
| 3277 default: |
| 3278 gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag); |
| 3279 } |
| 3280 |
| 3281 return (unsigned int)-1; |
| 3282 } |
| 3283 |
| 3284 // Relocate a section. |
| 3285 |
| 3286 template<int size, bool big_endian> |
| 3287 void |
| 3288 Target_mips<size, big_endian>::relocate_section( |
| 3289 const Relocate_info<size, big_endian>* relinfo, |
| 3290 unsigned int sh_type, |
| 3291 const unsigned char* prelocs, |
| 3292 size_t reloc_count, |
| 3293 Output_section* output_section, |
| 3294 bool needs_special_offset_handling, |
| 3295 unsigned char* view, |
| 3296 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 3297 section_size_type view_size, |
| 3298 const Reloc_symbol_changes* reloc_symbol_changes) |
| 3299 { |
| 3300 typedef Target_mips<size, big_endian> Mips; |
| 3301 typedef typename Target_mips<size, big_endian>::Relocate Mips_relocate; |
| 3302 |
| 3303 |
| 3304 if (sh_type == elfcpp::SHT_REL) |
| 3305 gold::relocate_section<size, big_endian, Mips, elfcpp::SHT_REL, |
| 3306 Mips_relocate>( |
| 3307 relinfo, |
| 3308 this, |
| 3309 prelocs, |
| 3310 reloc_count, |
| 3311 output_section, |
| 3312 needs_special_offset_handling, |
| 3313 view, |
| 3314 address, |
| 3315 view_size, |
| 3316 reloc_symbol_changes); |
| 3317 else if (sh_type == elfcpp::SHT_RELA) |
| 3318 gold::relocate_section<size, big_endian, Mips, elfcpp::SHT_RELA, |
| 3319 Mips_relocate>( |
| 3320 relinfo, |
| 3321 this, |
| 3322 prelocs, |
| 3323 reloc_count, |
| 3324 output_section, |
| 3325 needs_special_offset_handling, |
| 3326 view, |
| 3327 address, |
| 3328 view_size, |
| 3329 reloc_symbol_changes); |
| 3330 } |
| 3331 |
| 3332 // Return the size of a relocation while scanning during a relocatable |
| 3333 // link. |
| 3334 |
| 3335 template<int size, bool big_endian> |
| 3336 unsigned int |
| 3337 Target_mips<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( |
| 3338 unsigned int r_type, |
| 3339 Relobj* object) |
| 3340 { |
| 3341 switch (r_type) |
| 3342 { |
| 3343 case elfcpp::R_MIPS_NONE: |
| 3344 case elfcpp::R_MIPS_UNUSED1: |
| 3345 case elfcpp::R_MIPS_UNUSED2: |
| 3346 case elfcpp::R_MIPS_UNUSED3: |
| 3347 case elfcpp::R_MIPS_INSERT_A: |
| 3348 case elfcpp::R_MIPS_INSERT_B: |
| 3349 case elfcpp::R_MIPS_DELETE: |
| 3350 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 3351 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 3352 case elfcpp::R_MIPS_REL16: |
| 3353 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 3354 case elfcpp::R_MIPS_PJUMP: |
| 3355 case elfcpp::R_MIPS_RELGOT: |
| 3356 case elfcpp::R_MIPS_TLS_TPREL64: |
| 3357 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 3358 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 3359 return 0; |
| 3360 |
| 3361 case elfcpp::R_MIPS_64: |
| 3362 case elfcpp::R_MIPS_SUB: |
| 3363 return 8; |
| 3364 |
| 3365 case elfcpp::R_MIPS_32: |
| 3366 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 3367 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 3368 case elfcpp::R_MIPS_TLS_TPREL32: |
| 3369 case elfcpp::R_MIPS_REL32: |
| 3370 case elfcpp::R_MIPS_PC32: |
| 3371 case elfcpp::R_MIPS_GPREL32: |
| 3372 case elfcpp::R_MIPS_JALR: |
| 3373 case elfcpp::R_MIPS_SCN_DISP: |
| 3374 return 4; |
| 3375 |
| 3376 case elfcpp::R_MIPS_16: |
| 3377 case elfcpp::R_MIPS_HI16: |
| 3378 case elfcpp::R_MIPS_LO16: |
| 3379 case elfcpp::R_MIPS_HIGHER: |
| 3380 case elfcpp::R_MIPS_HIGHEST: |
| 3381 case elfcpp::R_MIPS_GPREL16: |
| 3382 case elfcpp::R_MIPS16_HI16: |
| 3383 case elfcpp::R_MIPS16_LO16: |
| 3384 case elfcpp::R_MIPS_PC16: |
| 3385 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 3386 case elfcpp::R_MIPS_GOT16: |
| 3387 case elfcpp::R_MIPS16_GOT16: |
| 3388 case elfcpp::R_MIPS_CALL16: |
| 3389 case elfcpp::R_MIPS16_CALL16: |
| 3390 case elfcpp::R_MIPS_GOT_HI16: |
| 3391 case elfcpp::R_MIPS_CALL_HI16: |
| 3392 case elfcpp::R_MIPS_GOT_LO16: |
| 3393 case elfcpp::R_MIPS_CALL_LO16: |
| 3394 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 3395 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 3396 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 3397 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 3398 case elfcpp::R_MIPS16_GPREL: |
| 3399 case elfcpp::R_MIPS_GOT_DISP: |
| 3400 case elfcpp::R_MIPS_LITERAL: |
| 3401 case elfcpp::R_MIPS_GOT_PAGE: |
| 3402 case elfcpp::R_MIPS_GOT_OFST: |
| 3403 case elfcpp::R_MIPS_TLS_GD: |
| 3404 case elfcpp::R_MIPS_TLS_LDM: |
| 3405 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 3406 return 2; |
| 3407 |
| 3408 // These relocations are not byte sized |
| 3409 case elfcpp::R_MIPS_26: |
| 3410 case elfcpp::R_MIPS16_26: |
| 3411 return 4; |
| 3412 |
| 3413 // These relocations are not byte sized |
| 3414 case elfcpp::R_MIPS_SHIFT5: |
| 3415 case elfcpp::R_MIPS_SHIFT6: |
| 3416 return 1; |
| 3417 |
| 3418 case elfcpp::R_MIPS_COPY: |
| 3419 case elfcpp::R_MIPS_GLOB_DAT: |
| 3420 case elfcpp::R_MIPS_JUMP_SLOT: |
| 3421 object->error(_("unexpected reloc %u in object file"), r_type); |
| 3422 return 0; |
| 3423 |
| 3424 default: |
| 3425 object->error(_("unsupported reloc %u in object file"), r_type); |
| 3426 return 0; |
| 3427 } |
| 3428 } |
| 3429 |
| 3430 // Scan the relocs during a relocatable link. |
| 3431 |
| 3432 template<int size, bool big_endian> |
| 3433 void |
| 3434 Target_mips<size, big_endian>::scan_relocatable_relocs( |
| 3435 Symbol_table* symtab, |
| 3436 Layout* layout, |
| 3437 Sized_relobj_file<size, big_endian>* object, |
| 3438 unsigned int data_shndx, |
| 3439 unsigned int sh_type, |
| 3440 const unsigned char* prelocs, |
| 3441 size_t reloc_count, |
| 3442 Output_section* output_section, |
| 3443 bool needs_special_offset_handling, |
| 3444 size_t local_symbol_count, |
| 3445 const unsigned char* plocal_symbols, |
| 3446 Relocatable_relocs* rr) |
| 3447 { |
| 3448 gold_assert(sh_type == elfcpp::SHT_REL); |
| 3449 |
| 3450 typedef Mips_scan_relocatable_relocs<big_endian, elfcpp::SHT_REL, |
| 3451 Relocatable_size_for_reloc> Scan_relocatable_relocs; |
| 3452 |
| 3453 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_REL, |
| 3454 Scan_relocatable_relocs>( |
| 3455 symtab, |
| 3456 layout, |
| 3457 object, |
| 3458 data_shndx, |
| 3459 prelocs, |
| 3460 reloc_count, |
| 3461 output_section, |
| 3462 needs_special_offset_handling, |
| 3463 local_symbol_count, |
| 3464 plocal_symbols, |
| 3465 rr); |
| 3466 } |
| 3467 |
| 3468 // Relocate a section during a relocatable link. |
| 3469 |
| 3470 template<int size, bool big_endian> |
| 3471 void |
| 3472 Target_mips<size, big_endian>::relocate_for_relocatable( |
| 3473 const Relocate_info<size, big_endian>* relinfo, |
| 3474 unsigned int sh_type, |
| 3475 const unsigned char* prelocs, |
| 3476 size_t reloc_count, |
| 3477 Output_section* output_section, |
| 3478 off_t offset_in_output_section, |
| 3479 const Relocatable_relocs* rr, |
| 3480 unsigned char* view, |
| 3481 typename elfcpp::Elf_types<size>::Elf_Addr view_address, |
| 3482 section_size_type view_size, |
| 3483 unsigned char* reloc_view, |
| 3484 section_size_type reloc_view_size) |
| 3485 { |
| 3486 gold_assert(sh_type == elfcpp::SHT_REL); |
| 3487 |
| 3488 gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_REL>( |
| 3489 relinfo, |
| 3490 prelocs, |
| 3491 reloc_count, |
| 3492 output_section, |
| 3493 offset_in_output_section, |
| 3494 rr, |
| 3495 view, |
| 3496 view_address, |
| 3497 view_size, |
| 3498 reloc_view, |
| 3499 reloc_view_size); |
| 3500 } |
| 3501 |
| 3502 // Perform target-specific processing in a relocatable link. This is |
| 3503 // only used if we use the relocation strategy RELOC_SPECIAL. |
| 3504 |
| 3505 template<int size, bool big_endian> |
| 3506 void |
| 3507 Target_mips<size, big_endian>::relocate_special_relocatable( |
| 3508 const Relocate_info<size, big_endian>* relinfo, |
| 3509 unsigned int sh_type, |
| 3510 const unsigned char* preloc_in, |
| 3511 size_t relnum, |
| 3512 Output_section* output_section, |
| 3513 off_t offset_in_output_section, |
| 3514 unsigned char* view, |
| 3515 elfcpp::Elf_types<32>::Elf_Addr view_address, |
| 3516 section_size_type, |
| 3517 unsigned char* preloc_out) |
| 3518 { |
| 3519 typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc Reltype
; |
| 3520 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc Relaty
pe; |
| 3521 |
| 3522 typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc_write |
| 3523 Reltype_write; |
| 3524 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write |
| 3525 Relatype_write; |
| 3526 |
| 3527 typedef typename elfcpp::Elf_types<32>::Elf_Addr Mips_address; |
| 3528 typedef Mips_relocate_functions<size, big_endian> Reloc_funcs; |
| 3529 |
| 3530 const Mips_address invalid_address = static_cast<Mips_address>(0) - 1; |
| 3531 |
| 3532 const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
| 3533 const unsigned int local_count = object->local_symbol_count(); |
| 3534 |
| 3535 // SHT_REL types |
| 3536 Reltype reloc(preloc_in); |
| 3537 Reltype_write reloc_write(preloc_out); |
| 3538 |
| 3539 // SHT_RELA types |
| 3540 Relatype reloca(preloc_in); |
| 3541 Relatype_write reloca_write(preloc_out); |
| 3542 |
| 3543 elfcpp::Elf_types<32>::Elf_WXword r_info; |
| 3544 |
| 3545 if (sh_type == elfcpp::SHT_RELA) |
| 3546 r_info = reloca.get_r_info(); |
| 3547 else |
| 3548 r_info = reloc.get_r_info(); |
| 3549 |
| 3550 const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 3551 const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); |
| 3552 |
| 3553 // Get the new symbol index. |
| 3554 // We only use RELOC_SPECIAL strategy in local relocations. |
| 3555 gold_assert(r_sym < local_count); |
| 3556 |
| 3557 // We are adjusting a section symbol. We need to find |
| 3558 // the symbol table index of the section symbol for |
| 3559 // the output section corresponding to input section |
| 3560 // in which this symbol is defined. |
| 3561 bool is_ordinary; |
| 3562 unsigned int shndx = object->local_symbol_input_shndx(r_sym, &is_ordinary); |
| 3563 gold_assert(is_ordinary); |
| 3564 Output_section* os = object->output_section(shndx); |
| 3565 gold_assert(os != NULL); |
| 3566 gold_assert(os->needs_symtab_index()); |
| 3567 unsigned int new_symndx = os->symtab_index(); |
| 3568 |
| 3569 // Get the new offset--the location in the output section where |
| 3570 // this relocation should be applied. |
| 3571 |
| 3572 Mips_address offset; |
| 3573 |
| 3574 if (sh_type == elfcpp::SHT_RELA) |
| 3575 offset = reloca.get_r_offset(); |
| 3576 else |
| 3577 offset = reloc.get_r_offset(); |
| 3578 |
| 3579 Mips_address new_offset; |
| 3580 if (offset_in_output_section != invalid_address) |
| 3581 new_offset = offset + offset_in_output_section; |
| 3582 else |
| 3583 { |
| 3584 section_offset_type sot_offset = |
| 3585 convert_types<section_offset_type, Mips_address>(offset); |
| 3586 section_offset_type new_sot_offset = |
| 3587 output_section->output_offset(object, relinfo->data_shndx, |
| 3588 sot_offset); |
| 3589 gold_assert(new_sot_offset != -1); |
| 3590 new_offset = new_sot_offset; |
| 3591 } |
| 3592 |
| 3593 // In an object file, r_offset is an offset within the section. |
| 3594 // In an executable or dynamic object, generated by |
| 3595 // --emit-relocs, r_offset is an absolute address. |
| 3596 if (!parameters->options().relocatable()) |
| 3597 { |
| 3598 new_offset += view_address; |
| 3599 if (offset_in_output_section != invalid_address) |
| 3600 new_offset -= offset_in_output_section; |
| 3601 } |
| 3602 |
| 3603 typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
| 3604 if (sh_type == elfcpp::SHT_RELA) |
| 3605 r_addend = reloca.get_r_addend(); |
| 3606 else |
| 3607 r_addend = 0; |
| 3608 |
| 3609 if (sh_type == elfcpp::SHT_RELA) |
| 3610 { |
| 3611 reloca_write.put_r_offset(new_offset); |
| 3612 reloca_write.put_r_info(elfcpp::elf_r_info<32>(new_symndx, r_type)); |
| 3613 reloca_write.put_r_addend(r_addend); |
| 3614 } |
| 3615 else |
| 3616 { |
| 3617 reloc_write.put_r_offset(new_offset); |
| 3618 reloc_write.put_r_info(elfcpp::elf_r_info<32>(new_symndx, r_type)); |
| 3619 } |
| 3620 |
| 3621 // Handle the reloc addend. |
| 3622 // The relocation uses a section symbol in the input file. |
| 3623 // We are adjusting it to use a section symbol in the output |
| 3624 // file. The input section symbol refers to some address in |
| 3625 // the input section. We need the relocation in the output |
| 3626 // file to refer to that same address. This adjustment to |
| 3627 // the addend is the same calculation we use for a simple |
| 3628 // absolute relocation for the input section symbol. |
| 3629 |
| 3630 unsigned char* paddend = view + offset; |
| 3631 typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY; |
| 3632 switch (r_type) |
| 3633 { |
| 3634 case elfcpp::R_MIPS_26: |
| 3635 reloc_status = Reloc_funcs::rel26(paddend, object, object->local_symbol(r_
sym), |
| 3636 offset_in_output_section, false, |
| 3637 r_addend, sh_type); |
| 3638 |
| 3639 break; |
| 3640 |
| 3641 default: |
| 3642 gold_unreachable(); |
| 3643 } |
| 3644 |
| 3645 // Report any errors. |
| 3646 switch (reloc_status) |
| 3647 { |
| 3648 case Reloc_funcs::STATUS_OKAY: |
| 3649 break; |
| 3650 case Reloc_funcs::STATUS_OVERFLOW: |
| 3651 gold_error_at_location(relinfo, relnum, new_offset, |
| 3652 _("relocation overflow")); |
| 3653 break; |
| 3654 case Reloc_funcs::STATUS_BAD_RELOC: |
| 3655 gold_error_at_location( |
| 3656 relinfo, |
| 3657 relnum, |
| 3658 new_offset , |
| 3659 _("unexpected opcode while processing relocation")); |
| 3660 break; |
| 3661 default: |
| 3662 gold_unreachable(); |
| 3663 } |
| 3664 } |
| 3665 |
| 3666 // Optimize the TLS relocation type based on what we know about the |
| 3667 // symbol. IS_FINAL is true if the final address of this symbol is |
| 3668 // known at link time. |
| 3669 |
| 3670 template<int size, bool big_endian> |
| 3671 tls::Tls_optimization |
| 3672 Target_mips<size, big_endian>::optimize_tls_reloc(bool, int) |
| 3673 { |
| 3674 // FIXME: Currently we do not do any TLS optimization. |
| 3675 return tls::TLSOPT_NONE; |
| 3676 } |
| 3677 |
| 3678 // We are about to emit a dynamic relocation of type R_TYPE. If the |
| 3679 // dynamic linker does not support it, issue an error. |
| 3680 |
| 3681 template<int size, bool big_endian> |
| 3682 void |
| 3683 Target_mips<size, big_endian>::Scan::check_non_pic(Relobj* object, |
| 3684 unsigned int r_type) |
| 3685 { |
| 3686 switch (r_type) |
| 3687 { |
| 3688 // These are the relocation types supported by glibc for MIPS. |
| 3689 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 3690 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 3691 case elfcpp::R_MIPS_TLS_TPREL32: |
| 3692 case elfcpp::R_MIPS_REL32: |
| 3693 case elfcpp::R_MIPS_GLOB_DAT: |
| 3694 case elfcpp::R_MIPS_64: |
| 3695 return; |
| 3696 |
| 3697 default: |
| 3698 { |
| 3699 // This prevents us from issuing more than one error per reloc |
| 3700 // section. But we can still wind up issuing more than one |
| 3701 // error per object file. |
| 3702 if (this->issued_non_pic_error_) |
| 3703 return; |
| 3704 gold_assert(parameters->options().output_is_position_independent()); |
| 3705 object->error(_("requires unsupported dynamic reloc; " |
| 3706 "recompile with -fPIC")); |
| 3707 this->issued_non_pic_error_ = true; |
| 3708 return; |
| 3709 } |
| 3710 |
| 3711 case elfcpp::R_MIPS_NONE: |
| 3712 gold_unreachable(); |
| 3713 } |
| 3714 } |
| 3715 |
| 3716 // Scan a relocation for a local symbol. |
| 3717 |
| 3718 template<int size, bool big_endian> |
| 3719 inline void |
| 3720 Target_mips<size, big_endian>::Scan::local( |
| 3721 Symbol_table* symtab, |
| 3722 Layout* layout, |
| 3723 Target_mips<size, big_endian>* target, |
| 3724 Sized_relobj_file<size, big_endian>* object, |
| 3725 unsigned int data_shndx, |
| 3726 Output_section* output_section, |
| 3727 const elfcpp::Rela<size, big_endian>* rela, |
| 3728 const elfcpp::Rel<size, big_endian>* rel, |
| 3729 unsigned int rel_type, |
| 3730 unsigned int r_type, |
| 3731 const elfcpp::Sym<size, big_endian>& lsym) |
| 3732 { |
| 3733 typename elfcpp::Elf_types<size>::Elf_Addr r_offset; |
| 3734 typename elfcpp::Elf_types<size>::Elf_WXword r_info; |
| 3735 typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
| 3736 |
| 3737 if (rel_type == elfcpp::SHT_RELA) |
| 3738 { |
| 3739 r_offset = rela->get_r_offset(); |
| 3740 r_info = rela->get_r_info(); |
| 3741 r_addend = rela->get_r_addend(); |
| 3742 } |
| 3743 else |
| 3744 { |
| 3745 r_offset = rel->get_r_offset(); |
| 3746 r_info = rel->get_r_info(); |
| 3747 r_addend = 0; |
| 3748 } |
| 3749 |
| 3750 switch (r_type) |
| 3751 { |
| 3752 // Global offset table relocations |
| 3753 case elfcpp::R_MIPS_CALL16: |
| 3754 case elfcpp::R_MIPS16_CALL16: |
| 3755 case elfcpp::R_MIPS_GOT16: |
| 3756 case elfcpp::R_MIPS16_GOT16: |
| 3757 { |
| 3758 Mips_output_data_got<size, big_endian>* got = |
| 3759 target->got_section(symtab, layout); |
| 3760 |
| 3761 std::stringstream tmp; |
| 3762 tmp << static_cast<unsigned int> (r_info) |
| 3763 << static_cast<unsigned int> (reinterpret_cast<unsigned long long> (ob
ject)) |
| 3764 << static_cast<unsigned int> (r_offset); |
| 3765 std::string key = tmp.str(); |
| 3766 |
| 3767 got->add_got16_view(key, got); |
| 3768 } |
| 3769 break; |
| 3770 case elfcpp::R_MIPS_GOT_DISP: |
| 3771 case elfcpp::R_MIPS_GOT_HI16: |
| 3772 case elfcpp::R_MIPS_CALL_HI16: |
| 3773 case elfcpp::R_MIPS_GOT_LO16: |
| 3774 case elfcpp::R_MIPS_CALL_LO16: |
| 3775 { |
| 3776 // The symbol requires a GOT entry. |
| 3777 Mips_output_data_got<size, big_endian>* got = |
| 3778 target->got_section(symtab, layout); |
| 3779 |
| 3780 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 3781 |
| 3782 got->add_local(object, r_sym, GOT_TYPE_STANDARD); |
| 3783 } |
| 3784 break; |
| 3785 case elfcpp::R_MIPS_GPREL32: |
| 3786 case elfcpp::R_MIPS_GPREL16: |
| 3787 case elfcpp::R_MIPS16_GPREL: |
| 3788 case elfcpp::R_MIPS_LITERAL: |
| 3789 break; |
| 3790 case elfcpp::R_MIPS_NONE: |
| 3791 case elfcpp::R_MIPS_16: |
| 3792 break; |
| 3793 case elfcpp::R_MIPS_32: |
| 3794 { |
| 3795 if (parameters->options().output_is_position_independent()) |
| 3796 { |
| 3797 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 3798 unsigned int r_sym = elfcpp::elf_r_sym<32>(r_info); |
| 3799 |
| 3800 rel_dyn->add_symbolless_local_addend(object, r_sym, elfcpp::R_MIPS_R
EL32, |
| 3801 output_section, data_shndx, |
| 3802 r_offset); |
| 3803 } |
| 3804 } |
| 3805 case elfcpp::R_MIPS_REL32: |
| 3806 case elfcpp::R_MIPS_26: |
| 3807 case elfcpp::R_MIPS_HI16: |
| 3808 case elfcpp::R_MIPS_LO16: |
| 3809 case elfcpp::R_MIPS_PC16: |
| 3810 case elfcpp::R_MIPS_UNUSED1: |
| 3811 case elfcpp::R_MIPS_UNUSED2: |
| 3812 case elfcpp::R_MIPS_UNUSED3: |
| 3813 case elfcpp::R_MIPS_SHIFT5: |
| 3814 case elfcpp::R_MIPS_SHIFT6: |
| 3815 case elfcpp::R_MIPS_64: |
| 3816 case elfcpp::R_MIPS_GOT_PAGE: |
| 3817 case elfcpp::R_MIPS_GOT_OFST: |
| 3818 case elfcpp::R_MIPS_SUB: |
| 3819 case elfcpp::R_MIPS_INSERT_A: |
| 3820 case elfcpp::R_MIPS_INSERT_B: |
| 3821 case elfcpp::R_MIPS_DELETE: |
| 3822 case elfcpp::R_MIPS_HIGHER: |
| 3823 case elfcpp::R_MIPS_HIGHEST: |
| 3824 case elfcpp::R_MIPS_SCN_DISP: |
| 3825 case elfcpp::R_MIPS_REL16: |
| 3826 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 3827 case elfcpp::R_MIPS_PJUMP: |
| 3828 case elfcpp::R_MIPS_RELGOT: |
| 3829 case elfcpp::R_MIPS_JALR: |
| 3830 case elfcpp::R_MIPS_GLOB_DAT: |
| 3831 case elfcpp::R_MIPS16_26: |
| 3832 case elfcpp::R_MIPS16_HI16: |
| 3833 case elfcpp::R_MIPS16_LO16: |
| 3834 case elfcpp::R_MIPS_COPY: |
| 3835 case elfcpp::R_MIPS_JUMP_SLOT: |
| 3836 case elfcpp::R_MIPS_PC32: |
| 3837 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 3838 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 3839 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 3840 break; |
| 3841 |
| 3842 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 3843 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 3844 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 3845 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 3846 case elfcpp::R_MIPS_TLS_GD: |
| 3847 case elfcpp::R_MIPS_TLS_LDM: |
| 3848 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 3849 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 3850 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 3851 case elfcpp::R_MIPS_TLS_TPREL32: |
| 3852 case elfcpp::R_MIPS_TLS_TPREL64: |
| 3853 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 3854 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 3855 { |
| 3856 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 3857 if (object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)) |
| 3858 break; |
| 3859 |
| 3860 bool output_is_shared = parameters->options().shared(); |
| 3861 const tls::Tls_optimization optimized_type |
| 3862 = Target_mips<size, big_endian>::optimize_tls_reloc( |
| 3863 !output_is_shared, r_type); |
| 3864 switch (r_type) |
| 3865 { |
| 3866 case elfcpp::R_MIPS_TLS_GD: |
| 3867 if (optimized_type == tls::TLSOPT_NONE) |
| 3868 { |
| 3869 // Create a pair of GOT entries for the module index and |
| 3870 // dtv-relative offset. |
| 3871 Mips_output_data_got<size, big_endian>* got |
| 3872 = target->got_section(symtab, layout); |
| 3873 unsigned int shndx = lsym.get_st_shndx(); |
| 3874 bool is_ordinary; |
| 3875 shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); |
| 3876 if (!is_ordinary) |
| 3877 { |
| 3878 object->error(_("local symbol %u has bad shndx %u"), |
| 3879 r_sym, shndx); |
| 3880 break; |
| 3881 } |
| 3882 |
| 3883 got->add_tls_gd_local_reloc(GOT_TYPE_TLS_PAIR, object, r_sym); |
| 3884 } |
| 3885 else |
| 3886 // FIXME: TLS optimization not supported yet. |
| 3887 gold_unreachable(); |
| 3888 break; |
| 3889 |
| 3890 case elfcpp::R_MIPS_TLS_LDM: |
| 3891 if (optimized_type == tls::TLSOPT_NONE) |
| 3892 { |
| 3893 // Create a GOT entry for the module index. |
| 3894 target->got_mod_index_entry(symtab, layout, object); |
| 3895 } |
| 3896 else |
| 3897 // FIXME: TLS optimization not supported yet. |
| 3898 gold_unreachable(); |
| 3899 break; |
| 3900 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 3901 layout->set_has_static_tls(); |
| 3902 if (optimized_type == tls::TLSOPT_NONE) |
| 3903 { |
| 3904 // Create a GOT entry for the tp-relative offset. |
| 3905 Mips_output_data_got<size, big_endian>* got |
| 3906 = target->got_section(symtab, layout); |
| 3907 if (!parameters->doing_static_link()) |
| 3908 got->add_local_with_rel(object, r_sym, GOT_TYPE_TLS_OFFSET, |
| 3909 target->rel_dyn_section(layout), |
| 3910 size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 : |
| 3911 elfcpp::R_MIPS_TLS_TPREL64); |
| 3912 else if (!object->local_has_got_offset(r_sym, |
| 3913 GOT_TYPE_TLS_OFFSET)) |
| 3914 { |
| 3915 got->add_local(object, r_sym, GOT_TYPE_TLS_OFFSET); |
| 3916 |
| 3917 unsigned int got_offset = |
| 3918 object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET); |
| 3919 got->add_static_reloc(got_offset, |
| 3920 size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 : |
| 3921 elfcpp::R_MIPS_TLS_TPREL64, object, |
| 3922 r_sym); |
| 3923 } |
| 3924 } |
| 3925 else |
| 3926 // FIXME: TLS optimization not supported yet. |
| 3927 gold_unreachable(); |
| 3928 break; |
| 3929 |
| 3930 default: // TODO AS: Check if this is correct at all |
| 3931 layout->set_has_static_tls(); |
| 3932 if (output_is_shared) |
| 3933 { |
| 3934 // We need to create a dynamic relocation. |
| 3935 gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION); |
| 3936 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 3937 rel_dyn->add_local(object, r_sym, size == 32 ? |
| 3938 elfcpp::R_MIPS_TLS_TPREL32 : |
| 3939 elfcpp::R_MIPS_TLS_TPREL64, |
| 3940 output_section, data_shndx, r_offset); |
| 3941 } |
| 3942 break; |
| 3943 } |
| 3944 } |
| 3945 break; |
| 3946 |
| 3947 default: |
| 3948 unsupported_reloc_local(object, r_type); |
| 3949 break; |
| 3950 } |
| 3951 } |
| 3952 |
| 3953 template<int size, bool big_endian> |
| 3954 inline void |
| 3955 Target_mips<size, big_endian>::Scan::local( |
| 3956 Symbol_table* symtab, |
| 3957 Layout* layout, |
| 3958 Target_mips<size, big_endian>* target, |
| 3959 Sized_relobj_file<size, big_endian>* object, |
| 3960 unsigned int data_shndx, |
| 3961 Output_section* output_section, |
| 3962 const elfcpp::Rel<size, big_endian>& reloc, |
| 3963 unsigned int r_type, |
| 3964 const elfcpp::Sym<size, big_endian>& lsym) |
| 3965 { |
| 3966 local( |
| 3967 symtab, |
| 3968 layout, |
| 3969 target, |
| 3970 object, |
| 3971 data_shndx, |
| 3972 output_section, |
| 3973 (const elfcpp::Rela<size, big_endian>*) NULL, |
| 3974 &reloc, |
| 3975 elfcpp::SHT_REL, |
| 3976 r_type, |
| 3977 lsym); |
| 3978 } |
| 3979 |
| 3980 |
| 3981 template<int size, bool big_endian> |
| 3982 inline void |
| 3983 Target_mips<size, big_endian>::Scan::local( |
| 3984 Symbol_table* symtab, |
| 3985 Layout* layout, |
| 3986 Target_mips<size, big_endian>* target, |
| 3987 Sized_relobj_file<size, big_endian>* object, |
| 3988 unsigned int data_shndx, |
| 3989 Output_section* output_section, |
| 3990 const elfcpp::Rela<size, big_endian>& reloc, |
| 3991 unsigned int r_type, |
| 3992 const elfcpp::Sym<size, big_endian>& lsym) |
| 3993 { |
| 3994 local( |
| 3995 symtab, |
| 3996 layout, |
| 3997 target, |
| 3998 object, |
| 3999 data_shndx, |
| 4000 output_section, |
| 4001 &reloc, |
| 4002 (const elfcpp::Rel<size, big_endian>*) NULL, |
| 4003 elfcpp::SHT_RELA, |
| 4004 r_type, |
| 4005 lsym); |
| 4006 } |
| 4007 |
| 4008 template<int size, bool big_endian> |
| 4009 void |
| 4010 Mips_output_data_got<size, big_endian>::do_write(Output_file* of) |
| 4011 { |
| 4012 typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; |
| 4013 |
| 4014 // Call parent to write out GOT. |
| 4015 Output_data_got<size, big_endian>::do_write(of); |
| 4016 |
| 4017 // Collect views for later fixing values of .got section |
| 4018 if (!this->got16_views_.empty()) |
| 4019 { |
| 4020 const off_t offset = this->offset(); |
| 4021 const section_size_type oview_size = |
| 4022 convert_to_section_size_type(this->data_size()); |
| 4023 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 4024 |
| 4025 this->got_view_ = oview; |
| 4026 } |
| 4027 |
| 4028 // We are done if there is no fix up. |
| 4029 if (this->static_relocs_.empty()) |
| 4030 return; |
| 4031 |
| 4032 const off_t offset = this->offset(); |
| 4033 const section_size_type oview_size = |
| 4034 convert_to_section_size_type(this->data_size()); |
| 4035 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 4036 |
| 4037 Output_segment* tls_segment = this->layout_->tls_segment(); |
| 4038 gold_assert(tls_segment != NULL); |
| 4039 |
| 4040 for (size_t i = 0; i < this->static_relocs_.size(); ++i) |
| 4041 { |
| 4042 Static_reloc& reloc(this->static_relocs_[i]); |
| 4043 |
| 4044 Mips_address value; |
| 4045 if (!reloc.symbol_is_global()) |
| 4046 { |
| 4047 Sized_relobj_file<size, big_endian>* object = reloc.relobj(); |
| 4048 const Symbol_value<size>* psymval = |
| 4049 reloc.relobj()->local_symbol(reloc.index()); |
| 4050 |
| 4051 // We are doing static linking. Issue an error and skip this |
| 4052 // relocation if the symbol is undefined or in a discarded_section. |
| 4053 bool is_ordinary; |
| 4054 unsigned int shndx = psymval->input_shndx(&is_ordinary); |
| 4055 if ((shndx == elfcpp::SHN_UNDEF) |
| 4056 || (is_ordinary |
| 4057 && shndx != elfcpp::SHN_UNDEF |
| 4058 && !object->is_section_included(shndx) |
| 4059 && !this->symbol_table_->is_section_folded(object, shndx))) |
| 4060 { |
| 4061 gold_error(_("undefined or discarded local symbol %u from " |
| 4062 " object %s in GOT"), |
| 4063 reloc.index(), reloc.relobj()->name().c_str()); |
| 4064 continue; |
| 4065 } |
| 4066 |
| 4067 value = psymval->value(object, 0); |
| 4068 } |
| 4069 else |
| 4070 { |
| 4071 const Symbol* gsym = reloc.symbol(); |
| 4072 gold_assert(gsym != NULL); |
| 4073 if (gsym->is_forwarder()) |
| 4074 gsym = this->symbol_table_->resolve_forwards(gsym); |
| 4075 |
| 4076 // We are doing static linking. Issue an error and skip this |
| 4077 // relocation if the symbol is undefined or in a discarded_section |
| 4078 // unless it is a weakly_undefined symbol. |
| 4079 if ((gsym->is_defined_in_discarded_section() |
| 4080 || gsym->is_undefined()) |
| 4081 && !gsym->is_weak_undefined()) |
| 4082 { |
| 4083 gold_error(_("undefined or discarded symbol %s in GOT"), |
| 4084 gsym->name()); |
| 4085 continue; |
| 4086 } |
| 4087 |
| 4088 if (!gsym->is_weak_undefined()) |
| 4089 { |
| 4090 const Sized_symbol<size>* sym = |
| 4091 static_cast<const Sized_symbol<size>*>(gsym); |
| 4092 value = sym->value(); |
| 4093 } |
| 4094 else |
| 4095 value = 0; |
| 4096 } |
| 4097 |
| 4098 unsigned got_offset = reloc.got_offset(); |
| 4099 gold_assert(got_offset < oview_size); |
| 4100 |
| 4101 typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; |
| 4102 Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset); |
| 4103 Valtype x; |
| 4104 |
| 4105 switch (reloc.r_type()) |
| 4106 { |
| 4107 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 4108 x = value; |
| 4109 break; |
| 4110 case elfcpp::R_MIPS_TLS_TPREL32: |
| 4111 x = value - elfcpp::TP_OFFSET; |
| 4112 break; |
| 4113 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 4114 x = value - elfcpp::DTP_OFFSET; |
| 4115 break; |
| 4116 default: |
| 4117 gold_unreachable(); |
| 4118 break; |
| 4119 } |
| 4120 |
| 4121 elfcpp::Swap<size, big_endian>::writeval(wv, x); |
| 4122 } |
| 4123 |
| 4124 of->write_output_view(offset, oview_size, oview); |
| 4125 } |
| 4126 |
| 4127 // Scan a relocation for a global symbol. |
| 4128 |
| 4129 template<int size, bool big_endian> |
| 4130 inline void |
| 4131 Target_mips<size, big_endian>::Scan::global( |
| 4132 Symbol_table* symtab, |
| 4133 Layout* layout, |
| 4134 Target_mips<size, big_endian>* target, |
| 4135 Sized_relobj_file<size, big_endian>* object, |
| 4136 unsigned int data_shndx, |
| 4137 Output_section* output_section, |
| 4138 const elfcpp::Rela<size, big_endian>* rela, |
| 4139 const elfcpp::Rel<size, big_endian>* rel, |
| 4140 unsigned int rel_type, |
| 4141 unsigned int r_type, |
| 4142 Symbol* gsym) |
| 4143 { |
| 4144 typename elfcpp::Elf_types<size>::Elf_Addr r_offset; |
| 4145 typename elfcpp::Elf_types<size>::Elf_WXword r_info; |
| 4146 typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
| 4147 |
| 4148 if (rel_type == elfcpp::SHT_RELA) |
| 4149 { |
| 4150 r_offset = rela->get_r_offset(); |
| 4151 r_info = rela->get_r_info(); |
| 4152 r_addend = rela->get_r_addend(); |
| 4153 } |
| 4154 else |
| 4155 { |
| 4156 r_offset = rel->get_r_offset(); |
| 4157 r_info = rel->get_r_info(); |
| 4158 r_addend = 0; |
| 4159 } |
| 4160 |
| 4161 // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got |
| 4162 // section. We check here to avoid creating a dynamic reloc against |
| 4163 // _GLOBAL_OFFSET_TABLE_. |
| 4164 if (!target->has_got_section() |
| 4165 && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) |
| 4166 target->got_section(symtab, layout); |
| 4167 |
| 4168 // TODO AS: Check where to put this code!!!!! |
| 4169 if (!parameters->options().shared()) |
| 4170 if ((this->symbol_needs_plt_entry(gsym)) && (!gsym->has_plt_offset())) |
| 4171 { |
| 4172 if (gsym->object() != object) |
| 4173 { |
| 4174 if (parameters->options().output_is_position_independent()) |
| 4175 { |
| 4176 gold_assert(!gsym->has_dynsym_index()); |
| 4177 target->make_mips_stubs_entry(symtab, layout, gsym); |
| 4178 } |
| 4179 else if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)
)) |
| 4180 { |
| 4181 target->make_plt_entry(symtab, layout, gsym); |
| 4182 } |
| 4183 } |
| 4184 |
| 4185 // Since this is not a PC-relative relocation, we may be |
| 4186 // taking the address of a function. In that case we need to |
| 4187 // set the entry in the dynamic symbol table to the address of |
| 4188 // the PLT entry. |
| 4189 if (((gsym->is_from_dynobj() && !parameters->options().shared()) || |
| 4190 ((this->get_reference_flags(r_type) == Symbol::ABSOLUTE_REF) |
| 4191 && !(parameters->options().output_is_position_independent()))) |
| 4192 && (gsym->has_plt_offset())) |
| 4193 { |
| 4194 gsym->set_needs_dynsym_value(); |
| 4195 gsym->set_nonvis(elfcpp::STO_MIPS_PLT>>2); |
| 4196 } |
| 4197 } |
| 4198 |
| 4199 if ((gsym->has_plt_offset()) |
| 4200 && (parameters->options().output_is_position_independent())) |
| 4201 switch (r_type) |
| 4202 { |
| 4203 case elfcpp::R_MIPS_HI16: |
| 4204 case elfcpp::R_MIPS_LO16: |
| 4205 case elfcpp::R_MIPS_CALL16: |
| 4206 case elfcpp::R_MIPS_JALR: |
| 4207 break; |
| 4208 default: |
| 4209 target->remove_stub_entry(gsym); |
| 4210 break; |
| 4211 } |
| 4212 |
| 4213 switch (r_type) |
| 4214 { |
| 4215 case elfcpp::R_MIPS_NONE: |
| 4216 case elfcpp::R_MIPS_UNUSED1: |
| 4217 case elfcpp::R_MIPS_UNUSED2: |
| 4218 case elfcpp::R_MIPS_UNUSED3: |
| 4219 case elfcpp::R_MIPS_INSERT_A: |
| 4220 case elfcpp::R_MIPS_INSERT_B: |
| 4221 case elfcpp::R_MIPS_DELETE: |
| 4222 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 4223 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 4224 case elfcpp::R_MIPS_REL16: |
| 4225 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 4226 case elfcpp::R_MIPS_PJUMP: |
| 4227 case elfcpp::R_MIPS_RELGOT: |
| 4228 case elfcpp::R_MIPS_TLS_TPREL64: |
| 4229 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 4230 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 4231 break; |
| 4232 case elfcpp::R_MIPS_GOT16: |
| 4233 case elfcpp::R_MIPS16_GOT16: |
| 4234 case elfcpp::R_MIPS_CALL16: |
| 4235 case elfcpp::R_MIPS16_CALL16: |
| 4236 case elfcpp::R_MIPS_GOT_DISP: |
| 4237 case elfcpp::R_MIPS_GOT_HI16: |
| 4238 case elfcpp::R_MIPS_CALL_HI16: |
| 4239 case elfcpp::R_MIPS_GOT_LO16: |
| 4240 case elfcpp::R_MIPS_CALL_LO16: |
| 4241 case elfcpp::R_MIPS_GOT_PAGE: |
| 4242 case elfcpp::R_MIPS_GOT_OFST: |
| 4243 { |
| 4244 // The symbol requires a GOT entry. |
| 4245 Mips_output_data_got<size, big_endian>* got = |
| 4246 target->got_section(symtab, layout); |
| 4247 if (!gsym->final_value_is_known() |
| 4248 || (parameters->options().output_is_position_independent())) |
| 4249 got->add_global_with_reloc_mips(gsym); |
| 4250 else |
| 4251 { |
| 4252 got->add_global(gsym, GOT_TYPE_STANDARD); |
| 4253 gsym->set_needs_dynsym_entry(); |
| 4254 } |
| 4255 |
| 4256 } |
| 4257 break; |
| 4258 case elfcpp::R_MIPS_LITERAL: |
| 4259 gold_error(_("%s:R_MIPS_LITERAL is defined only for local symbols"), |
| 4260 object->name().c_str()); |
| 4261 break; |
| 4262 case elfcpp::R_MIPS_GPREL32: |
| 4263 gold_error(_("%s:R_MIPS_GPREL32 not defined for global symbols"), |
| 4264 object->name().c_str()); |
| 4265 case elfcpp::R_MIPS_GPREL16: |
| 4266 case elfcpp::R_MIPS16_GPREL: |
| 4267 case elfcpp::R_MIPS16_26: |
| 4268 break; |
| 4269 case elfcpp::R_MIPS_26: |
| 4270 case elfcpp::R_MIPS_PC16: |
| 4271 { |
| 4272 const unsigned char* pehdr = gsym->object()->get_view( |
| 4273 elfcpp::file_header_offset, |
| 4274 elfcpp::Elf_sizes<size>::ehdr_size, |
| 4275 true, false); |
| 4276 |
| 4277 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 4278 |
| 4279 if (((ehdr.get_e_flags() & elfcpp::EF_MIPS_PIC) != 0) |
| 4280 && (gsym->is_defined_in_discarded_section() == false) |
| 4281 && (gsym->is_func()) |
| 4282 && (!gsym->has_plt_offset()) |
| 4283 && (gsym->object() != object)) |
| 4284 { |
| 4285 bool is_ordinary = false; |
| 4286 |
| 4287 target->make_stub_entry(layout); |
| 4288 target->set_stub_flag(); |
| 4289 |
| 4290 // If the function is at the beginning of the section and if we |
| 4291 // would need no more than 2 nops. |
| 4292 // TODO AS: For now we only support stubs of second type |
| 4293 if ((((Sized_symbol<size> *)gsym)->value() == 0) |
| 4294 &&(gsym->object()->section_addralign(gsym->shndx(&is_ordinary)) |
| 4295 <= 16)) |
| 4296 { |
| 4297 if (target->stub_symbol(gsym->name()) == NULL) |
| 4298 target->stub_->add_entry(symtab, target, gsym); |
| 4299 } |
| 4300 else |
| 4301 { |
| 4302 if (target->stub_symbol(gsym->name()) == NULL) |
| 4303 target->stub_->add_entry(symtab, target, gsym); |
| 4304 } |
| 4305 } |
| 4306 break; |
| 4307 } |
| 4308 case elfcpp::R_MIPS_16: |
| 4309 case elfcpp::R_MIPS_SHIFT5: |
| 4310 case elfcpp::R_MIPS_SHIFT6: |
| 4311 case elfcpp::R_MIPS_SUB: |
| 4312 case elfcpp::R_MIPS_HIGHER: |
| 4313 case elfcpp::R_MIPS_HIGHEST: |
| 4314 case elfcpp::R_MIPS_SCN_DISP: |
| 4315 case elfcpp::R_MIPS16_HI16: |
| 4316 case elfcpp::R_MIPS16_LO16: |
| 4317 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 4318 case elfcpp::R_MIPS_PC32: |
| 4319 break; |
| 4320 case elfcpp::R_MIPS_HI16: |
| 4321 case elfcpp::R_MIPS_LO16: |
| 4322 case elfcpp::R_MIPS_32: |
| 4323 case elfcpp::R_MIPS_64: |
| 4324 // Absolute addressing relocations. |
| 4325 { |
| 4326 // Make a dynamic relocation if necessary. |
| 4327 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
| 4328 { |
| 4329 if (gsym->may_need_copy_reloc() && gsym->in_dyn() |
| 4330 && !((r_type == elfcpp::R_MIPS_32) || (r_type == elfcpp::R_MIPS_64
))) |
| 4331 { |
| 4332 if (rel_type == elfcpp::SHT_RELA) |
| 4333 target->copy_reloc(symtab, layout, object, |
| 4334 data_shndx, output_section, gsym, *rela); |
| 4335 else |
| 4336 target->copy_reloc(symtab, layout, object, |
| 4337 data_shndx, output_section, gsym, *rel); |
| 4338 } |
| 4339 else if ((r_type == elfcpp::R_MIPS_32) || (r_type == elfcpp::R_MIPS_
64)) |
| 4340 { |
| 4341 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 4342 Mips_output_data_got<size, big_endian>* |
| 4343 got = target->got_section(symtab, layout); |
| 4344 |
| 4345 if (!gsym->final_value_is_known() |
| 4346 || (parameters->options().output_is_position_independent())) |
| 4347 got->add_global_with_reloc_mips(gsym); |
| 4348 |
| 4349 rel_dyn->add_global(gsym, elfcpp::R_MIPS_REL32, output_section,
object, |
| 4350 data_shndx, r_offset); |
| 4351 } |
| 4352 } |
| 4353 } |
| 4354 break; |
| 4355 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 4356 case elfcpp::R_MIPS_TLS_GD: |
| 4357 case elfcpp::R_MIPS_TLS_LDM: |
| 4358 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 4359 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 4360 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 4361 case elfcpp::R_MIPS_TLS_TPREL32: |
| 4362 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 4363 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 4364 { |
| 4365 if (gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)) |
| 4366 break; |
| 4367 |
| 4368 const bool is_final = gsym->final_value_is_known(); |
| 4369 const tls::Tls_optimization optimized_type = |
| 4370 Target_mips<size, big_endian>::optimize_tls_reloc(is_final, r_type); |
| 4371 //unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 4372 |
| 4373 switch (r_type) |
| 4374 { |
| 4375 case elfcpp::R_MIPS_TLS_GD: |
| 4376 if (optimized_type == tls::TLSOPT_NONE) |
| 4377 { |
| 4378 // Create a pair of GOT entries for the module index and |
| 4379 // dtv-relative offset. |
| 4380 Mips_output_data_got<size, big_endian>* got |
| 4381 = target->got_section(symtab, layout); |
| 4382 if (!parameters->doing_static_link()) |
| 4383 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR, |
| 4384 target->rel_dyn_section(layout), |
| 4385 size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 : |
| 4386 elfcpp::R_MIPS_TLS_DTPMOD64, |
| 4387 size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 : |
| 4388 elfcpp::R_MIPS_TLS_DTPREL64); |
| 4389 else |
| 4390 got->add_tls_gd_with_static_reloc(GOT_TYPE_TLS_PAIR, gsym); |
| 4391 } |
| 4392 else |
| 4393 // FIXME: TLS optimization not supported yet. |
| 4394 gold_unreachable(); |
| 4395 break; |
| 4396 |
| 4397 case elfcpp::R_MIPS_TLS_LDM: |
| 4398 if (optimized_type == tls::TLSOPT_NONE) |
| 4399 // Create a GOT entry for the module index. |
| 4400 target->got_mod_index_entry(symtab, layout, object); |
| 4401 else |
| 4402 // FIXME: TLS optimization not supported yet. |
| 4403 gold_unreachable(); |
| 4404 break; |
| 4405 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 4406 layout->set_has_static_tls(); |
| 4407 if (optimized_type == tls::TLSOPT_NONE) |
| 4408 { |
| 4409 // Create a GOT entry for the tp-relative offset. |
| 4410 Mips_output_data_got<size, big_endian>* got |
| 4411 = target->got_section(symtab, layout); |
| 4412 if (!parameters->doing_static_link()) |
| 4413 got->add_global_tls_with_reloc_mips(gsym, target->rel_dyn_sect
ion(layout), |
| 4414 elfcpp::R_MIPS_TLS_TPREL32); |
| 4415 else if (!gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)) |
| 4416 { |
| 4417 got->add_global(gsym, GOT_TYPE_TLS_OFFSET); |
| 4418 unsigned int got_offset = |
| 4419 gsym->got_offset(GOT_TYPE_TLS_OFFSET); |
| 4420 got->add_static_reloc(got_offset, |
| 4421 size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 : |
| 4422 elfcpp::R_MIPS_TLS_TPREL64, gsym); |
| 4423 } |
| 4424 } |
| 4425 else |
| 4426 // FIXME: TLS optimization not supported yet. |
| 4427 gold_unreachable(); |
| 4428 break; |
| 4429 |
| 4430 default: |
| 4431 layout->set_has_static_tls(); |
| 4432 if (parameters->options().shared()) |
| 4433 { |
| 4434 // We need to create a dynamic relocation. |
| 4435 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 4436 rel_dyn->add_global(gsym, |
| 4437 size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 : |
| 4438 elfcpp::R_MIPS_TLS_TPREL64, |
| 4439 output_section, object, |
| 4440 data_shndx, r_offset); |
| 4441 } |
| 4442 break; |
| 4443 } |
| 4444 } |
| 4445 break; |
| 4446 case elfcpp::R_MIPS_REL32: |
| 4447 // Relative addressing relocations. |
| 4448 { |
| 4449 // Make a dynamic relocation if necessary. |
| 4450 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
| 4451 { |
| 4452 if (gsym->may_need_copy_reloc()) |
| 4453 { |
| 4454 if (rel_type == elfcpp::SHT_RELA) |
| 4455 target->copy_reloc(symtab, layout, object, |
| 4456 data_shndx, output_section, gsym, *rela); |
| 4457 else |
| 4458 target->copy_reloc(symtab, layout, object, |
| 4459 data_shndx, output_section, gsym, *rel); |
| 4460 } |
| 4461 else |
| 4462 { |
| 4463 check_non_pic(object, r_type); |
| 4464 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 4465 rel_dyn->add_global(gsym, r_type, output_section, object, |
| 4466 data_shndx, r_offset); |
| 4467 } |
| 4468 } |
| 4469 } |
| 4470 break; |
| 4471 case elfcpp::R_MIPS_JALR: |
| 4472 break; |
| 4473 case elfcpp::R_MIPS_COPY: |
| 4474 case elfcpp::R_MIPS_GLOB_DAT: |
| 4475 case elfcpp::R_MIPS_JUMP_SLOT: |
| 4476 // These are relocations which should only be seen by the |
| 4477 // dynamic linker, and should never be seen here. |
| 4478 gold_error(_("%s: unexpected reloc %u in object file"), |
| 4479 object->name().c_str(), r_type); |
| 4480 break; |
| 4481 |
| 4482 default: |
| 4483 unsupported_reloc_global(object, r_type, gsym); |
| 4484 break; |
| 4485 } |
| 4486 } |
| 4487 |
| 4488 template<int size, bool big_endian> |
| 4489 inline void |
| 4490 Target_mips<size, big_endian>::Scan::global( |
| 4491 Symbol_table* symtab, |
| 4492 Layout* layout, |
| 4493 Target_mips<size, big_endian>* target, |
| 4494 Sized_relobj_file<size, big_endian>* object, |
| 4495 unsigned int data_shndx, |
| 4496 Output_section* output_section, |
| 4497 const elfcpp::Rela<size, big_endian>& reloc, |
| 4498 unsigned int r_type, |
| 4499 Symbol* gsym) |
| 4500 { |
| 4501 global( |
| 4502 symtab, |
| 4503 layout, |
| 4504 target, |
| 4505 object, |
| 4506 data_shndx, |
| 4507 output_section, |
| 4508 &reloc, |
| 4509 (const elfcpp::Rel<size, big_endian>*) NULL, |
| 4510 elfcpp::SHT_RELA, |
| 4511 r_type, |
| 4512 gsym); |
| 4513 } |
| 4514 |
| 4515 template<int size, bool big_endian> |
| 4516 inline void |
| 4517 Target_mips<size, big_endian>::Scan::global( |
| 4518 Symbol_table* symtab, |
| 4519 Layout* layout, |
| 4520 Target_mips<size, big_endian>* target, |
| 4521 Sized_relobj_file<size, big_endian>* object, |
| 4522 unsigned int data_shndx, |
| 4523 Output_section* output_section, |
| 4524 const elfcpp::Rel<size, big_endian>& reloc, |
| 4525 unsigned int r_type, |
| 4526 Symbol* gsym) |
| 4527 { |
| 4528 global( |
| 4529 symtab, |
| 4530 layout, |
| 4531 target, |
| 4532 object, |
| 4533 data_shndx, |
| 4534 output_section, |
| 4535 (const elfcpp::Rela<size, big_endian>*) NULL, |
| 4536 &reloc, |
| 4537 elfcpp::SHT_REL, |
| 4538 r_type, |
| 4539 gsym); |
| 4540 } |
| 4541 |
| 4542 // Perform a relocation. |
| 4543 |
| 4544 template<int size, bool big_endian> |
| 4545 inline bool |
| 4546 Target_mips<size, big_endian>::Relocate::relocate( |
| 4547 const Relocate_info<size, big_endian>* relinfo, |
| 4548 Target_mips* target, |
| 4549 Output_section* output_section, |
| 4550 size_t relnum, |
| 4551 const elfcpp::Rela<size, big_endian>* rela, |
| 4552 const elfcpp::Rel<size, big_endian>* rel, |
| 4553 unsigned int rel_type, |
| 4554 unsigned int r_type, |
| 4555 const Sized_symbol<size>* gsym, |
| 4556 const Symbol_value<size>* psymval, |
| 4557 unsigned char* view, |
| 4558 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 4559 section_size_type) |
| 4560 { |
| 4561 typename elfcpp::Elf_types<size>::Elf_Addr r_offset; |
| 4562 typename elfcpp::Elf_types<size>::Elf_WXword r_info; |
| 4563 typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
| 4564 |
| 4565 if (rel_type == elfcpp::SHT_RELA) |
| 4566 { |
| 4567 r_offset = rela->get_r_offset(); |
| 4568 r_info = rela->get_r_info(); |
| 4569 r_addend = rela->get_r_addend(); |
| 4570 } |
| 4571 else |
| 4572 { |
| 4573 r_offset = rel->get_r_offset(); |
| 4574 r_info = rel->get_r_info(); |
| 4575 r_addend = 0; |
| 4576 } |
| 4577 |
| 4578 typedef Mips_relocate_functions<size, big_endian> Reloc_funcs; |
| 4579 typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY; |
| 4580 |
| 4581 unsigned int got_offset = 0; |
| 4582 const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
| 4583 |
| 4584 Symbol_value<size> symval; |
| 4585 |
| 4586 // __gnu_local_gp is _gp symbol, just swich it |
| 4587 if (gsym && (strcmp(gsym->name(), "__gnu_local_gp") == 0)) |
| 4588 { |
| 4589 gsym = target->gp(); |
| 4590 |
| 4591 gold_assert(gsym != NULL); |
| 4592 |
| 4593 symval.set_output_value(target->gp_address()); |
| 4594 |
| 4595 psymval = &symval; |
| 4596 } |
| 4597 else if (gsym && (strcmp(gsym->name(), "_gp_disp") == 0)) |
| 4598 { |
| 4599 if (r_type != elfcpp::R_MIPS_HI16 && r_type != elfcpp::R_MIPS16_HI16 && |
| 4600 r_type != elfcpp::R_MIPS_LO16 && r_type != elfcpp::R_MIPS16_LO16) |
| 4601 gold_error_at_location(relinfo, relnum, r_offset, |
| 4602 _("relocations against _gp_disp are permitted only" |
| 4603 " with R_MIPS_HI16 and R_MIPS_LO16 relocations.")); |
| 4604 |
| 4605 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 4606 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 4607 Valtype addend = (elfcpp::Swap<32, big_endian>::readval(wv)) & 0xffffU; |
| 4608 Valtype value; |
| 4609 |
| 4610 if (r_type == elfcpp::R_MIPS16_HI16) |
| 4611 value = addend + target->gp_address() - address - 4; |
| 4612 else if (r_type == elfcpp::R_MIPS_HI16) |
| 4613 value = addend + target->gp_address() - address; |
| 4614 else if (r_type == elfcpp::R_MIPS16_LO16) |
| 4615 value = addend + target->gp_address() - address; |
| 4616 else if (r_type == elfcpp::R_MIPS_LO16) |
| 4617 value = addend + target->gp_address() - address + 4; |
| 4618 else |
| 4619 gold_unreachable(); |
| 4620 |
| 4621 symval.set_output_value(value); |
| 4622 |
| 4623 psymval = &symval; |
| 4624 } |
| 4625 |
| 4626 // Get the GOT offset. |
| 4627 // The GOT pointer points to the end of the GOT section. |
| 4628 // We need to subtract the size of the GOT section to get |
| 4629 // the actual offset to use in the relocation. |
| 4630 switch (r_type) |
| 4631 { |
| 4632 case elfcpp::R_MIPS_GOT_DISP: |
| 4633 case elfcpp::R_MIPS_GOT_HI16: |
| 4634 case elfcpp::R_MIPS_CALL_HI16: |
| 4635 case elfcpp::R_MIPS_GOT_LO16: |
| 4636 case elfcpp::R_MIPS_CALL_LO16: |
| 4637 if (gsym != NULL) |
| 4638 { |
| 4639 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); |
| 4640 got_offset = (gsym->got_offset(GOT_TYPE_STANDARD) |
| 4641 - target->got_size()); |
| 4642 } |
| 4643 else |
| 4644 { |
| 4645 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 4646 gold_assert(relinfo->object->local_has_got_offset |
| 4647 (r_sym, GOT_TYPE_STANDARD)); |
| 4648 got_offset = (relinfo->object->local_got_offset |
| 4649 (r_sym, GOT_TYPE_STANDARD) - target->got_size()); |
| 4650 } |
| 4651 break; |
| 4652 case elfcpp::R_MIPS_TLS_GD: |
| 4653 if (gsym != NULL) |
| 4654 { |
| 4655 got_offset = target->got_section()->address() + |
| 4656 gsym->got_offset(GOT_TYPE_TLS_PAIR) - |
| 4657 target->gp_address(); |
| 4658 } |
| 4659 else |
| 4660 { |
| 4661 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 4662 gold_assert(relinfo->object->local_has_got_offset |
| 4663 (r_sym, GOT_TYPE_TLS_PAIR)); |
| 4664 got_offset = target->got_section()->address() + |
| 4665 relinfo->object->local_got_offset(r_sym, GOT_TYPE_TLS_PAIR) - |
| 4666 target->gp_address(); |
| 4667 } |
| 4668 break; |
| 4669 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 4670 if (gsym != NULL) |
| 4671 { |
| 4672 got_offset = target->got_section()->address() + |
| 4673 gsym->got_offset(GOT_TYPE_TLS_OFFSET) - |
| 4674 target->gp_address(); |
| 4675 } |
| 4676 else |
| 4677 { |
| 4678 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 4679 gold_assert(relinfo->object->local_has_got_offset |
| 4680 (r_sym, GOT_TYPE_TLS_OFFSET)); |
| 4681 got_offset = target->got_section()->address() + |
| 4682 relinfo->object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET) - |
| 4683 target->gp_address(); |
| 4684 } |
| 4685 break; |
| 4686 case elfcpp::R_MIPS_TLS_LDM: |
| 4687 // Relocate the field with the offset of the GOT entry for |
| 4688 // the module index. |
| 4689 got_offset = target->got_section()->address() + |
| 4690 (target->got_mod_index_entry(NULL, NULL, NULL)) - |
| 4691 target->gp_address(); |
| 4692 break; |
| 4693 case elfcpp::R_MIPS_GOT_OFST: |
| 4694 if ((gsym != NULL) && (!gsym->is_forced_local())) |
| 4695 { |
| 4696 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 4697 typedef typename elfcpp::Swap<16, big_endian>::Valtype Reltype; |
| 4698 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 4699 Reltype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 4700 addend &= 0x0000ffffU; |
| 4701 |
| 4702 got_offset = addend; |
| 4703 break; |
| 4704 } |
| 4705 case elfcpp::R_MIPS_GOT_PAGE: |
| 4706 { |
| 4707 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 4708 typedef typename elfcpp::Swap<16, big_endian>::Valtype Reltype; |
| 4709 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 4710 Reltype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 4711 addend &= 0x0000ffffU; |
| 4712 got_offset = target->got_section()->add_constant(psymval->value(object, |
| 4713 addend) + 0x00008000U) & ~0x0000ffffU; |
| 4714 } |
| 4715 break; |
| 4716 default: |
| 4717 break; |
| 4718 } |
| 4719 |
| 4720 // Pick the value to use for symbols defined in shared objects. |
| 4721 if (gsym != NULL |
| 4722 && gsym->use_plt_offset(Scan::get_reference_flags(r_type))) |
| 4723 { |
| 4724 elfcpp::Elf_Xword value; |
| 4725 |
| 4726 // To avoid problems with symbols that are no longer in .MIPS.stubs |
| 4727 if (gsym->plt_offset() > 0) |
| 4728 { |
| 4729 if (target->is_plt_symbol((Sized_symbol<size> *)gsym)) |
| 4730 value = target->plt_section()->address() + gsym->plt_offset(); |
| 4731 else |
| 4732 value = target->mips_stubs()->address() + |
| 4733 gsym->plt_offset() * (target->mips_stubs()->big_dyn_symtab() ? 20
: 16); |
| 4734 |
| 4735 symval.set_output_value(value); |
| 4736 |
| 4737 psymval = &symval; |
| 4738 } |
| 4739 } |
| 4740 |
| 4741 // Set symbol for use with stub |
| 4742 switch (r_type) |
| 4743 { |
| 4744 case elfcpp::R_MIPS_26: |
| 4745 case elfcpp::R_MIPS_PC16: |
| 4746 case elfcpp::R_MIPS16_26: |
| 4747 { |
| 4748 if (target->stub_flag()) |
| 4749 { |
| 4750 if (gsym == NULL) |
| 4751 break; |
| 4752 |
| 4753 Sized_symbol<size> * sym = static_cast<Sized_symbol<size>*> |
| 4754 (target->stub_symbol(gsym->name())); |
| 4755 if (sym != NULL) |
| 4756 { |
| 4757 symval.set_output_value(sym->value()); |
| 4758 psymval = &symval; |
| 4759 } |
| 4760 } |
| 4761 } |
| 4762 break; |
| 4763 default: |
| 4764 break; |
| 4765 } |
| 4766 |
| 4767 switch (r_type) |
| 4768 { |
| 4769 case elfcpp::R_MIPS_NONE: |
| 4770 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 4771 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 4772 break; |
| 4773 case elfcpp::R_MIPS_16: |
| 4774 reloc_status = Reloc_funcs::rel16(view, object, psymval, r_addend, rel_typ
e); |
| 4775 break; |
| 4776 case elfcpp::R_MIPS_32: |
| 4777 if ((gsym != NULL) |
| 4778 && ((parameters->options().shared()) |
| 4779 || (parameters->options().pie()))) |
| 4780 break; |
| 4781 |
| 4782 reloc_status = Reloc_funcs::rel32(view, object, psymval, r_addend, rel_typ
e); |
| 4783 break; |
| 4784 case elfcpp::R_MIPS_REL32: |
| 4785 if (parameters->options().shared() && (gsym != NULL)) |
| 4786 break; |
| 4787 case elfcpp::R_MIPS_PC32: |
| 4788 reloc_status = Reloc_funcs::relrel32(view, object, psymval, address, r_add
end, rel_type); |
| 4789 break; |
| 4790 case elfcpp::R_MIPS_26: |
| 4791 // TODO AS: Check if this is correct. |
| 4792 if (gsym != NULL) |
| 4793 reloc_status = Reloc_funcs::rel26(view, object, psymval, address, |
| 4794 gsym->is_forced_local(), r_addend, rel
_type); |
| 4795 else |
| 4796 reloc_status = Reloc_funcs::rel26(view, object, psymval, address, |
| 4797 false, r_addend, rel_type); |
| 4798 break; |
| 4799 case elfcpp::R_MIPS_HI16: |
| 4800 case elfcpp::R_MIPS16_HI16: |
| 4801 reloc_status = Reloc_funcs::relhi16(view, psymval->value(object, 0), r_add
end); |
| 4802 break; |
| 4803 case elfcpp::R_MIPS_LO16: |
| 4804 case elfcpp::R_MIPS16_LO16: |
| 4805 reloc_status = Reloc_funcs::rello16(view, object, psymval, r_addend, rel_t
ype); |
| 4806 break; |
| 4807 case elfcpp::R_MIPS_GPREL16: |
| 4808 case elfcpp::R_MIPS16_GPREL: |
| 4809 case elfcpp::R_MIPS_LITERAL: |
| 4810 reloc_status = Reloc_funcs::relgprel(view, object, psymval, |
| 4811 target->gp_address(), r_addend, rel_t
ype); |
| 4812 break; |
| 4813 case elfcpp::R_MIPS_GOT16: |
| 4814 case elfcpp::R_MIPS_CALL16: |
| 4815 case elfcpp::R_MIPS16_GOT16: |
| 4816 case elfcpp::R_MIPS16_CALL16: |
| 4817 { |
| 4818 typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; |
| 4819 Mips_output_data_got<size, big_endian>* got = target->got_section(); |
| 4820 Valtype got_offset; |
| 4821 |
| 4822 if (gsym == NULL) |
| 4823 { |
| 4824 std::stringstream tmp; |
| 4825 tmp << static_cast<unsigned int> (r_info) |
| 4826 << static_cast<unsigned int> (reinterpret_cast<unsigned long long>
(object)) |
| 4827 << static_cast<unsigned int> (r_offset); |
| 4828 std::string key = tmp.str(); |
| 4829 |
| 4830 got_offset = got->got16_offset(key); |
| 4831 } |
| 4832 else |
| 4833 got_offset = gsym->got_offset(GOT_TYPE_STANDARD); |
| 4834 |
| 4835 unsigned char* got_view = got_offset + |
| 4836 (unsigned char* const)got->got_view(); |
| 4837 |
| 4838 reloc_status = Reloc_funcs::relgot16(view, object, psymval, |
| 4839 target->gp_address(), got_view, |
| 4840 got->address(), got_offset, |
| 4841 gsym, r_addend, rel_type); |
| 4842 } |
| 4843 break; |
| 4844 case elfcpp::R_MIPS_PC16: |
| 4845 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 4846 reloc_status = Reloc_funcs::relpc16(view, object, psymval, address, |
| 4847 r_addend, rel_type); |
| 4848 break; |
| 4849 case elfcpp::R_MIPS_GPREL32: |
| 4850 reloc_status = Reloc_funcs::relgprel32(view, object, psymval, |
| 4851 target->gp_address(), r_addend, rel
_type); |
| 4852 break; |
| 4853 case elfcpp::R_MIPS_UNUSED1: |
| 4854 case elfcpp::R_MIPS_UNUSED2: |
| 4855 case elfcpp::R_MIPS_UNUSED3: |
| 4856 break; |
| 4857 case elfcpp::R_MIPS_SHIFT5: |
| 4858 reloc_status = Reloc_funcs::relsh5(view, object, psymval, r_addend, rel_ty
pe); |
| 4859 break; |
| 4860 case elfcpp::R_MIPS_SHIFT6: |
| 4861 reloc_status = Reloc_funcs::relsh6(view, object, psymval, r_addend, rel_ty
pe); |
| 4862 break; |
| 4863 case elfcpp::R_MIPS_64: |
| 4864 if (parameters->options().shared() && (gsym != NULL)) |
| 4865 break; |
| 4866 |
| 4867 reloc_status = Reloc_funcs::rel64(view, object, psymval, r_addend, rel_typ
e); |
| 4868 break; |
| 4869 case elfcpp::R_MIPS_GOT_HI16: |
| 4870 case elfcpp::R_MIPS_CALL_HI16: |
| 4871 got_offset = ((got_offset + 0x8000) >> 16); |
| 4872 case elfcpp::R_MIPS_GOT_LO16: |
| 4873 case elfcpp::R_MIPS_CALL_LO16: |
| 4874 case elfcpp::R_MIPS_GOT_OFST: |
| 4875 case elfcpp::R_MIPS_GOT_PAGE: |
| 4876 case elfcpp::R_MIPS_GOT_DISP: |
| 4877 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 4878 case elfcpp::R_MIPS_TLS_GD: |
| 4879 case elfcpp::R_MIPS_TLS_LDM: |
| 4880 reloc_status = Reloc_funcs::relgotofst(view, got_offset); |
| 4881 break; |
| 4882 case elfcpp::R_MIPS_SUB: |
| 4883 reloc_status = Reloc_funcs::relsub(view, object, psymval, r_addend, rel_ty
pe); |
| 4884 break; |
| 4885 case elfcpp::R_MIPS_INSERT_A: |
| 4886 case elfcpp::R_MIPS_INSERT_B: |
| 4887 case elfcpp::R_MIPS_DELETE: |
| 4888 break; |
| 4889 case elfcpp::R_MIPS_HIGHER: |
| 4890 reloc_status = Reloc_funcs::relhigher(view, object, psymval, r_addend, rel
_type); |
| 4891 break; |
| 4892 case elfcpp::R_MIPS_HIGHEST: |
| 4893 reloc_status = Reloc_funcs::relhighest(view, object, psymval, r_addend, re
l_type); |
| 4894 break; |
| 4895 case elfcpp::R_MIPS_SCN_DISP: |
| 4896 reloc_status = Reloc_funcs::relscndisp(view, object, psymval, |
| 4897 output_section->offset(), r_addend, rel_type); |
| 4898 break; |
| 4899 case elfcpp::R_MIPS_REL16: |
| 4900 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 4901 case elfcpp::R_MIPS_PJUMP: |
| 4902 case elfcpp::R_MIPS_RELGOT: |
| 4903 break; |
| 4904 case elfcpp::R_MIPS_JALR: |
| 4905 if ((gsym != NULL) && !(gsym->final_value_is_known())) |
| 4906 break; |
| 4907 |
| 4908 reloc_status = Reloc_funcs::reljalr(view, object, psymval, address); |
| 4909 break; |
| 4910 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 4911 reloc_status = Reloc_funcs::tlsrel32(view, object, psymval, |
| 4912 elfcpp::DTP_OFFSET, r_addend, rel_typ
e); |
| 4913 break; |
| 4914 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 4915 reloc_status = Reloc_funcs::tlsrello16(view, object, psymval, |
| 4916 elfcpp::DTP_OFFSET, r_addend, rel_t
ype); |
| 4917 break; |
| 4918 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 4919 reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval, |
| 4920 elfcpp::DTP_OFFSET, r_addend, rel_t
ype); |
| 4921 break; |
| 4922 case elfcpp::R_MIPS_TLS_TPREL32: |
| 4923 reloc_status = Reloc_funcs::tlsrel32(view, object, psymval, |
| 4924 elfcpp::TP_OFFSET, r_addend, rel_type
); |
| 4925 break; |
| 4926 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 4927 reloc_status = Reloc_funcs::tlsrello16(view, object, psymval, |
| 4928 elfcpp::TP_OFFSET, r_addend, rel_ty
pe); |
| 4929 break; |
| 4930 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 4931 reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval, |
| 4932 elfcpp::TP_OFFSET, r_addend, rel_ty
pe); |
| 4933 break; |
| 4934 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 4935 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 4936 case elfcpp::R_MIPS_TLS_TPREL64: |
| 4937 case elfcpp::R_MIPS_TLS_DTPMOD32: // TODO AS! For now this reloc do nothing. |
| 4938 break; |
| 4939 case elfcpp::R_MIPS_GLOB_DAT: |
| 4940 reloc_status = Reloc_funcs::relglob(view, object, psymval); |
| 4941 break; |
| 4942 default: |
| 4943 gold_error_at_location(relinfo, relnum, r_offset, |
| 4944 _("unsupported reloc %u"), r_type); |
| 4945 break; |
| 4946 } |
| 4947 |
| 4948 // Report any errors. |
| 4949 switch (reloc_status) |
| 4950 { |
| 4951 case Reloc_funcs::STATUS_OKAY: |
| 4952 break; |
| 4953 case Reloc_funcs::STATUS_OVERFLOW: |
| 4954 gold_error_at_location(relinfo, relnum, r_offset, |
| 4955 _("relocation overflow")); |
| 4956 break; |
| 4957 case Reloc_funcs::STATUS_BAD_RELOC: |
| 4958 gold_error_at_location( |
| 4959 relinfo, |
| 4960 relnum, |
| 4961 r_offset, |
| 4962 _("unexpected opcode while processing relocation")); |
| 4963 break; |
| 4964 default: |
| 4965 gold_unreachable(); |
| 4966 } |
| 4967 |
| 4968 return true; |
| 4969 } |
| 4970 |
| 4971 template<int size, bool big_endian> |
| 4972 inline bool |
| 4973 Target_mips<size, big_endian>::Relocate::relocate( |
| 4974 const Relocate_info<size, big_endian>* relinfo, |
| 4975 Target_mips* target, |
| 4976 Output_section* output_section, |
| 4977 size_t relnum, |
| 4978 const elfcpp::Rela<size, big_endian>& reloc, |
| 4979 unsigned int r_type, |
| 4980 const Sized_symbol<size>* gsym, |
| 4981 const Symbol_value<size>* psymval, |
| 4982 unsigned char* view, |
| 4983 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 4984 section_size_type view_size) |
| 4985 { |
| 4986 return relocate( |
| 4987 relinfo, |
| 4988 target, |
| 4989 output_section, |
| 4990 relnum, |
| 4991 &reloc, |
| 4992 (const elfcpp::Rel<size, big_endian>*) NULL, |
| 4993 elfcpp::SHT_RELA, |
| 4994 r_type, |
| 4995 gsym, |
| 4996 psymval, |
| 4997 view, |
| 4998 address, |
| 4999 view_size); |
| 5000 } |
| 5001 |
| 5002 template<int size, bool big_endian> |
| 5003 inline bool |
| 5004 Target_mips<size, big_endian>::Relocate::relocate( |
| 5005 const Relocate_info<size, big_endian>* relinfo, |
| 5006 Target_mips* target, |
| 5007 Output_section* output_section, |
| 5008 size_t relnum, |
| 5009 const elfcpp::Rel<size, big_endian>& reloc, |
| 5010 unsigned int r_type, |
| 5011 const Sized_symbol<size>* gsym, |
| 5012 const Symbol_value<size>* psymval, |
| 5013 unsigned char* view, |
| 5014 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 5015 section_size_type view_size) |
| 5016 { |
| 5017 return relocate( |
| 5018 relinfo, |
| 5019 target, |
| 5020 output_section, |
| 5021 relnum, |
| 5022 (const elfcpp::Rela<size, big_endian>*) NULL, |
| 5023 &reloc, |
| 5024 elfcpp::SHT_REL, |
| 5025 r_type, |
| 5026 gsym, |
| 5027 psymval, |
| 5028 view, |
| 5029 address, |
| 5030 view_size); |
| 5031 } |
| 5032 |
| 5033 // Get the Reference_flags for a particular relocation. |
| 5034 |
| 5035 template<int size, bool big_endian> |
| 5036 int |
| 5037 Target_mips<size, big_endian>::Scan::get_reference_flags( |
| 5038 unsigned int r_type) |
| 5039 { |
| 5040 switch (r_type) |
| 5041 { |
| 5042 case elfcpp::R_MIPS_NONE: |
| 5043 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 5044 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 5045 case elfcpp::R_MIPS_INSERT_A: |
| 5046 case elfcpp::R_MIPS_INSERT_B: |
| 5047 case elfcpp::R_MIPS_DELETE: |
| 5048 case elfcpp::R_MIPS_PJUMP: |
| 5049 case elfcpp::R_MIPS_RELGOT: |
| 5050 case elfcpp::R_MIPS_REL16: |
| 5051 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 5052 // No symbol reference. |
| 5053 return 0; |
| 5054 |
| 5055 case elfcpp::R_MIPS_16: |
| 5056 case elfcpp::R_MIPS_32: |
| 5057 case elfcpp::R_MIPS_64: |
| 5058 case elfcpp::R_MIPS_HI16: |
| 5059 case elfcpp::R_MIPS_LO16: |
| 5060 case elfcpp::R_MIPS_SHIFT5: |
| 5061 case elfcpp::R_MIPS_SHIFT6: |
| 5062 case elfcpp::R_MIPS_SUB: |
| 5063 case elfcpp::R_MIPS_HIGHER: |
| 5064 case elfcpp::R_MIPS_HIGHEST: |
| 5065 case elfcpp::R_MIPS_SCN_DISP: |
| 5066 case elfcpp::R_MIPS16_HI16: |
| 5067 case elfcpp::R_MIPS16_LO16: |
| 5068 return Symbol::ABSOLUTE_REF; |
| 5069 |
| 5070 case elfcpp::R_MIPS_26: |
| 5071 case elfcpp::R_MIPS16_26: |
| 5072 case elfcpp::R_MIPS_GPREL32: |
| 5073 case elfcpp::R_MIPS_GPREL16: |
| 5074 case elfcpp::R_MIPS16_GPREL: |
| 5075 case elfcpp::R_MIPS_REL32: |
| 5076 return Symbol::RELATIVE_REF; |
| 5077 |
| 5078 case elfcpp::R_MIPS_PC16: |
| 5079 case elfcpp::R_MIPS_PC32: |
| 5080 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 5081 case elfcpp::R_MIPS_JALR: |
| 5082 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
| 5083 |
| 5084 case elfcpp::R_MIPS_GOT16: |
| 5085 case elfcpp::R_MIPS16_GOT16: |
| 5086 case elfcpp::R_MIPS_CALL16: |
| 5087 case elfcpp::R_MIPS16_CALL16: |
| 5088 case elfcpp::R_MIPS_GOT_DISP: |
| 5089 case elfcpp::R_MIPS_GOT_HI16: |
| 5090 case elfcpp::R_MIPS_CALL_HI16: |
| 5091 case elfcpp::R_MIPS_GOT_LO16: |
| 5092 case elfcpp::R_MIPS_CALL_LO16: |
| 5093 case elfcpp::R_MIPS_LITERAL: |
| 5094 case elfcpp::R_MIPS_GOT_PAGE: |
| 5095 case elfcpp::R_MIPS_GOT_OFST: |
| 5096 // Absolute in GOT. |
| 5097 return Symbol::RELATIVE_REF; |
| 5098 |
| 5099 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 5100 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 5101 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 5102 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 5103 case elfcpp::R_MIPS_TLS_GD: |
| 5104 case elfcpp::R_MIPS_TLS_LDM: |
| 5105 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 5106 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 5107 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 5108 case elfcpp::R_MIPS_TLS_TPREL32: |
| 5109 case elfcpp::R_MIPS_TLS_TPREL64: |
| 5110 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 5111 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 5112 return Symbol::TLS_REF; |
| 5113 |
| 5114 case elfcpp::R_MIPS_COPY: |
| 5115 case elfcpp::R_MIPS_UNUSED1: |
| 5116 case elfcpp::R_MIPS_UNUSED2: |
| 5117 case elfcpp::R_MIPS_UNUSED3: |
| 5118 case elfcpp::R_MIPS_GLOB_DAT: |
| 5119 case elfcpp::R_MIPS_JUMP_SLOT: |
| 5120 default: |
| 5121 // Not expected. We will give an error later. |
| 5122 return 0; |
| 5123 } |
| 5124 } |
| 5125 |
| 5126 // Report an unsupported relocation against a local symbol. |
| 5127 |
| 5128 template<int size, bool big_endian> |
| 5129 void |
| 5130 Target_mips<size, big_endian>::Scan::unsupported_reloc_local( |
| 5131 Sized_relobj_file<size, big_endian>* object, |
| 5132 unsigned int r_type) |
| 5133 { |
| 5134 gold_error(_("%s: unsupported reloc %u against local symbol"), |
| 5135 object->name().c_str(), r_type); |
| 5136 } |
| 5137 |
| 5138 // Report an unsupported relocation against a global symbol. |
| 5139 |
| 5140 template<int size, bool big_endian> |
| 5141 void |
| 5142 Target_mips<size, big_endian>::Scan::unsupported_reloc_global( |
| 5143 Sized_relobj_file<size, big_endian>* object, |
| 5144 unsigned int r_type, |
| 5145 Symbol* gsym) |
| 5146 { |
| 5147 gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
| 5148 object->name().c_str(), r_type, gsym->demangled_name().c_str()); |
| 5149 } |
| 5150 |
| 5151 template<int size, bool big_endian> |
| 5152 Target::Target_info Target_mips<size, big_endian>::mips_info = |
| 5153 { |
| 5154 size, // size |
| 5155 big_endian, // is_big_endian |
| 5156 elfcpp::EM_MIPS, // machine_code |
| 5157 false, // has_make_symbol |
| 5158 false, // has_resolve |
| 5159 false, // has_code_fill |
| 5160 true, // is_default_stack_executable |
| 5161 false, // can_icf_inline_merge_sections |
| 5162 '\0', // wrap_char |
| 5163 "/lib/ld.so.1", // dynamic_linker |
| 5164 0x400000, // default_text_segment_address |
| 5165 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 5166 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
| 5167 elfcpp::SHN_UNDEF, // small_common_shndx |
| 5168 elfcpp::SHN_UNDEF, // large_common_shndx |
| 5169 0, // small_common_section_flags |
| 5170 0, // large_common_section_flags |
| 5171 NULL, // attributes_section |
| 5172 NULL // attributes_vendor |
| 5173 }; |
| 5174 |
| 5175 // Adjust ELF file header. |
| 5176 |
| 5177 template<int size, bool big_endian> |
| 5178 void |
| 5179 Target_mips<size, big_endian>::do_adjust_elf_header( |
| 5180 unsigned char* view, |
| 5181 int len) const |
| 5182 { |
| 5183 gold_assert(len == elfcpp::Elf_sizes<size>::ehdr_size); |
| 5184 |
| 5185 elfcpp::Ehdr<size, big_endian> ehdr(view); |
| 5186 unsigned char e_ident[elfcpp::EI_NIDENT]; |
| 5187 memcpy(e_ident, ehdr.get_e_ident(), elfcpp::EI_NIDENT); |
| 5188 |
| 5189 e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; |
| 5190 e_ident[elfcpp::EI_ABIVERSION] = elfcpp::EV_NONE; |
| 5191 |
| 5192 elfcpp::Ehdr_write<size, big_endian> oehdr(view); |
| 5193 oehdr.put_e_ident(e_ident); |
| 5194 oehdr.put_e_flags(this->processor_specific_flags_); |
| 5195 } |
| 5196 |
| 5197 // The selector for mips object files. |
| 5198 |
| 5199 template<int size, bool big_endian> |
| 5200 class Target_selector_mips : public Target_selector |
| 5201 { |
| 5202 public: |
| 5203 Target_selector_mips() |
| 5204 : Target_selector(elfcpp::EM_MIPS, size, big_endian, |
| 5205 (size == 64 ? |
| 5206 (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") : |
| 5207 (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips")), |
| 5208 (size == 64 ? |
| 5209 (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") : |
| 5210 (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips"))) |
| 5211 { } |
| 5212 |
| 5213 Target* do_instantiate_target() |
| 5214 { return new Target_mips<size, big_endian>(); } |
| 5215 }; |
| 5216 |
| 5217 Target_selector_mips<32, false> target_selector_mips32; |
| 5218 |
| 5219 |
| 5220 } // End anonymous namespace. |
OLD | NEW |