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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 Unordered_map<const char*, Symbol*> Stub_symbol_info; |
| 422 |
| 423 Target_mips() |
| 424 : Sized_target<size, big_endian>(&mips_info), |
| 425 got_(NULL), plt_(NULL), got_plt_(NULL), |
| 426 rel_dyn_(NULL), copy_relocs_(elfcpp::R_MIPS_COPY), got_mod_index_offset_(-
1U), |
| 427 gp_(NULL), stub_(NULL), stub_flag_(false), |
| 428 processor_specific_flags_(0), mips_stubs_(NULL), text_section_(NULL), |
| 429 layout_(NULL), symtab_(NULL) |
| 430 { |
| 431 add_extension(elfcpp::E_MIPS_ARCH_64R2, elfcpp::E_MIPS_MACH_OCTEON); |
| 432 add_extension(elfcpp::E_MIPS_ARCH_64, elfcpp::E_MIPS_ARCH_64R2); |
| 433 add_extension(elfcpp::E_MIPS_ARCH_64, elfcpp::E_MIPS_ARCH_64 |
| 434 | elfcpp::E_MIPS_MACH_SB1); |
| 435 add_extension(elfcpp::E_MIPS_ARCH_64, elfcpp::E_MIPS_ARCH_64 |
| 436 | elfcpp::E_MIPS_MACH_XLR); |
| 437 add_extension(elfcpp::E_MIPS_ARCH_64, elfcpp::E_MIPS_ARCH_64 |
| 438 | elfcpp::E_MIPS_MACH_LS3A); |
| 439 add_extension(elfcpp::E_MIPS_ARCH_5, elfcpp::E_MIPS_ARCH_64); |
| 440 add_extension(elfcpp::E_MIPS_ARCH_4 | elfcpp::E_MIPS_MACH_5400, |
| 441 elfcpp::E_MIPS_ARCH_4 | elfcpp::E_MIPS_MACH_5500); |
| 442 add_extension(elfcpp::E_MIPS_ARCH_4, elfcpp::E_MIPS_ARCH_4 |
| 443 | elfcpp::E_MIPS_MACH_5400); |
| 444 add_extension(elfcpp::E_MIPS_ARCH_4, elfcpp::E_MIPS_ARCH_5); |
| 445 add_extension(elfcpp::E_MIPS_ARCH_4, elfcpp::E_MIPS_ARCH_4 |
| 446 | elfcpp::E_MIPS_MACH_9000); |
| 447 add_extension(elfcpp::E_MIPS_ARCH_3 | elfcpp::E_MIPS_MACH_4100, |
| 448 elfcpp::E_MIPS_ARCH_3 | elfcpp::E_MIPS_MACH_4120); |
| 449 add_extension(elfcpp::E_MIPS_ARCH_3 | elfcpp::E_MIPS_MACH_4100, |
| 450 elfcpp::E_MIPS_ARCH_3 | elfcpp::E_MIPS_MACH_4111); |
| 451 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 452 | elfcpp::E_MIPS_MACH_LS2F); |
| 453 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 454 | elfcpp::E_MIPS_MACH_LS2F); |
| 455 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_4); |
| 456 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 457 | elfcpp::E_MIPS_MACH_4650); |
| 458 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 459 | elfcpp::E_MIPS_MACH_4100); |
| 460 add_extension(elfcpp::E_MIPS_ARCH_3, elfcpp::E_MIPS_ARCH_3 |
| 461 | elfcpp::E_MIPS_MACH_4111); |
| 462 add_extension(elfcpp::E_MIPS_ARCH_32, elfcpp::E_MIPS_ARCH_32R2); |
| 463 add_extension(elfcpp::E_MIPS_ARCH_2, elfcpp::E_MIPS_ARCH_3); |
| 464 add_extension(elfcpp::E_MIPS_ARCH_2, elfcpp::E_MIPS_ARCH_32); |
| 465 add_extension(elfcpp::E_MIPS_ARCH_1, elfcpp::E_MIPS_ARCH_2); |
| 466 add_extension(elfcpp::E_MIPS_ARCH_1, elfcpp::E_MIPS_ARCH_1 |
| 467 | elfcpp::E_MIPS_MACH_3900); |
| 468 } |
| 469 |
| 470 // Process the relocations to determine unreferenced sections for |
| 471 // garbage collection. |
| 472 void |
| 473 gc_process_relocs(Symbol_table* symtab, |
| 474 Layout* layout, |
| 475 Sized_relobj_file<size, big_endian>* object, |
| 476 unsigned int data_shndx, |
| 477 unsigned int sh_type, |
| 478 const unsigned char* prelocs, |
| 479 size_t reloc_count, |
| 480 Output_section* output_section, |
| 481 bool needs_special_offset_handling, |
| 482 size_t local_symbol_count, |
| 483 const unsigned char* plocal_symbols); |
| 484 |
| 485 // Scan the relocations to look for symbol adjustments. |
| 486 void |
| 487 scan_relocs(Symbol_table* symtab, |
| 488 Layout* layout, |
| 489 Sized_relobj_file<size, big_endian>* object, |
| 490 unsigned int data_shndx, |
| 491 unsigned int sh_type, |
| 492 const unsigned char* prelocs, |
| 493 size_t reloc_count, |
| 494 Output_section* output_section, |
| 495 bool needs_special_offset_handling, |
| 496 size_t local_symbol_count, |
| 497 const unsigned char* plocal_symbols); |
| 498 |
| 499 // Finalize the sections. |
| 500 void |
| 501 do_finalize_sections (Layout *, const Input_objects *, Symbol_table *); |
| 502 |
| 503 // Fix values that are known only after sections are finalized. |
| 504 void |
| 505 do_fix_sections(Layout*, Symbol_table*); |
| 506 |
| 507 // Relocate a section. |
| 508 void |
| 509 relocate_section(const Relocate_info<size, big_endian>*, |
| 510 unsigned int sh_type, |
| 511 const unsigned char* prelocs, |
| 512 size_t reloc_count, |
| 513 Output_section* output_section, |
| 514 bool needs_special_offset_handling, |
| 515 unsigned char* view, |
| 516 typename elfcpp::Elf_types<size>::Elf_Addr view_address, |
| 517 section_size_type view_size, |
| 518 const Reloc_symbol_changes*); |
| 519 |
| 520 // Scan the relocs during a relocatable link. |
| 521 void |
| 522 scan_relocatable_relocs(Symbol_table* symtab, |
| 523 Layout* layout, |
| 524 Sized_relobj_file<size, big_endian>* object, |
| 525 unsigned int data_shndx, |
| 526 unsigned int sh_type, |
| 527 const unsigned char* prelocs, |
| 528 size_t reloc_count, |
| 529 Output_section* output_section, |
| 530 bool needs_special_offset_handling, |
| 531 size_t local_symbol_count, |
| 532 const unsigned char* plocal_symbols, |
| 533 Relocatable_relocs*); |
| 534 |
| 535 // Relocate a section during a relocatable link. |
| 536 void |
| 537 relocate_for_relocatable(const Relocate_info<size, big_endian>*, |
| 538 unsigned int sh_type, |
| 539 const unsigned char* prelocs, |
| 540 size_t reloc_count, |
| 541 Output_section* output_section, |
| 542 off_t offset_in_output_section, |
| 543 const Relocatable_relocs*, |
| 544 unsigned char* view, |
| 545 typename elfcpp::Elf_types<size>::Elf_Addr view_addre
ss, |
| 546 section_size_type view_size, |
| 547 unsigned char* reloc_view, |
| 548 section_size_type reloc_view_size); |
| 549 |
| 550 // Perform target-specific processing in a relocatable link. This is |
| 551 // only used if we use the relocation strategy RELOC_SPECIAL. |
| 552 void |
| 553 relocate_special_relocatable(const Relocate_info<size, big_endian>* relinfo, |
| 554 unsigned int sh_type, |
| 555 const unsigned char* preloc_in, |
| 556 size_t relnum, |
| 557 Output_section* output_section, |
| 558 off_t offset_in_output_section, |
| 559 unsigned char* view, |
| 560 typename elfcpp::Elf_types<32>::Elf_Addr |
| 561 view_address, |
| 562 section_size_type view_size, |
| 563 unsigned char* preloc_out); |
| 564 |
| 565 // Return whether SYM is defined by the ABI. |
| 566 bool |
| 567 do_is_defined_by_abi(const Symbol* sym) const |
| 568 { |
| 569 return ((strcmp(sym->name(), "__gnu_local_gp") == 0) |
| 570 || (strcmp(sym->name(), "_gp_disp") == 0) |
| 571 || (strcmp(sym->name(), "___tls_get_addr") == 0)); |
| 572 } |
| 573 |
| 574 // Return the number of entries in the GOT. |
| 575 unsigned int |
| 576 got_entry_count() const |
| 577 { |
| 578 if (!this->has_got_section()) |
| 579 return 0; |
| 580 return this->got_size() / 4; |
| 581 } |
| 582 |
| 583 // Return the number of entries in the PLT. |
| 584 unsigned int |
| 585 plt_entry_count() const |
| 586 { |
| 587 if (this->plt_ == NULL) |
| 588 return 0; |
| 589 return this->plt_->entry_count(); |
| 590 } |
| 591 |
| 592 // Return the offset of the first non-reserved PLT entry. |
| 593 unsigned int |
| 594 first_plt_entry_offset() const |
| 595 { return Mips_output_data_plt<size, big_endian>::first_plt_entry_offset(); } |
| 596 |
| 597 // Return the size of each PLT entry. |
| 598 unsigned int |
| 599 plt_entry_size() const |
| 600 { return Mips_output_data_plt<size, big_endian>::plt_entry_size(); } |
| 601 |
| 602 // Get stub section |
| 603 Mips_output_data_stub<size, big_endian>* |
| 604 stub() |
| 605 { return this->stub_; } |
| 606 |
| 607 // Add stub symbol to map |
| 608 void |
| 609 add_stub_symbol(const char* name, Symbol *gsym) |
| 610 { this->stub_symbol_[name] = gsym; } |
| 611 |
| 612 // Get stub symbol from map |
| 613 Symbol* |
| 614 stub_symbol(const char* name) |
| 615 { return this->stub_symbol_[name]; } |
| 616 |
| 617 // Check if symbol is in .plt section |
| 618 bool |
| 619 is_plt_symbol(Sized_symbol<size> *sym) |
| 620 { |
| 621 if(this->mips_stubs_ == NULL) |
| 622 return true; |
| 623 |
| 624 return this->mips_stubs_->is_plt_symbol(sym); |
| 625 } |
| 626 |
| 627 // Return .MIPS.stubs output section. |
| 628 Mips_output_data_mips_stubs<size, big_endian> * |
| 629 mips_stubs() const |
| 630 { return this->mips_stubs_; } |
| 631 |
| 632 // Retrun address of .text section |
| 633 uint64_t |
| 634 text_section_address() const |
| 635 { |
| 636 if(this->text_section_ == 0) |
| 637 return 0; |
| 638 |
| 639 return this->text_section_->address(); |
| 640 } |
| 641 |
| 642 protected: |
| 643 // Return the value to use for a dynamic symbol which requires special |
| 644 // treatment. This is how we support equality comparisons of function |
| 645 // pointers across shared library boundaries, as described in the |
| 646 // processor specific ABI supplement. |
| 647 uint64_t |
| 648 do_dynsym_value(const Symbol* gsym) const; |
| 649 |
| 650 // Make an output section. |
| 651 Output_section* |
| 652 do_make_output_section (const char *name, elfcpp::Elf_Word type, |
| 653 elfcpp::Elf_Xword flags) |
| 654 { |
| 655 if(type == elfcpp::SHT_MIPS_REGINFO) |
| 656 return new Mips_output_section_reginfo<size>(name, type, flags); |
| 657 else |
| 658 return new Output_section(name, type, flags); |
| 659 } |
| 660 |
| 661 void |
| 662 do_adjust_elf_header(unsigned char* view, int len) const; |
| 663 |
| 664 // MIPS specific dynamic tags. |
| 665 unsigned int |
| 666 do_dynamic_tag_value(elfcpp::DT) const; |
| 667 |
| 668 private: |
| 669 // The class which scans relocations. |
| 670 class Scan |
| 671 { |
| 672 public: |
| 673 Scan() |
| 674 : issued_non_pic_error_(false) |
| 675 { } |
| 676 |
| 677 static inline int |
| 678 get_reference_flags(unsigned int r_type); |
| 679 |
| 680 inline void |
| 681 local(Symbol_table* symtab, Layout* layout, Target_mips* target, |
| 682 Sized_relobj_file<size, big_endian>* object, |
| 683 unsigned int data_shndx, |
| 684 Output_section* output_section, |
| 685 const elfcpp::Rel<size, big_endian>& reloc, unsigned int r_type, |
| 686 const elfcpp::Sym<size, big_endian>& lsym); |
| 687 |
| 688 inline void |
| 689 global(Symbol_table* symtab, Layout* layout, Target_mips* target, |
| 690 Sized_relobj_file<size, big_endian>* object, |
| 691 unsigned int data_shndx, |
| 692 Output_section* output_section, |
| 693 const elfcpp::Rel<size, big_endian>& reloc, unsigned int r_type, |
| 694 Symbol* gsym); |
| 695 |
| 696 inline bool |
| 697 local_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 698 Target_mips* , |
| 699 Sized_relobj_file<size, big_endian>* , |
| 700 unsigned int , |
| 701 Output_section* , |
| 702 const elfcpp::Rel<size, big_endian>& , |
| 703 unsigned int , |
| 704 const elfcpp::Sym<size, big_endian>&) |
| 705 { return false; } |
| 706 |
| 707 inline bool |
| 708 global_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 709 Target_mips* , |
| 710 Sized_relobj_file<size, big_endian>* , |
| 711 unsigned int , |
| 712 Output_section* , |
| 713 const elfcpp::Rel<size, big_endian>& , |
| 714 unsigned int , Symbol*) |
| 715 { return false; } |
| 716 |
| 717 private: |
| 718 static void |
| 719 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
| 720 unsigned int r_type); |
| 721 |
| 722 static void |
| 723 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
| 724 unsigned int r_type, Symbol*); |
| 725 |
| 726 static void |
| 727 generate_tls_call(Symbol_table* symtab, Layout* layout, |
| 728 Target_mips* target); |
| 729 |
| 730 void |
| 731 check_non_pic(Relobj*, unsigned int r_type); |
| 732 |
| 733 static bool |
| 734 symbol_needs_plt_entry(const Symbol* sym) |
| 735 { |
| 736 // An undefined symbol from an executable does not need a PLT entry. |
| 737 if (sym->is_undefined() && !parameters->options().shared()) |
| 738 return false; |
| 739 |
| 740 return (!parameters->doing_static_link() |
| 741 && sym->is_func() |
| 742 && (!sym->is_undef_binding_weak()) |
| 743 && (sym->is_from_dynobj() |
| 744 || sym->is_undefined() |
| 745 || sym->is_preemptible())); |
| 746 } |
| 747 |
| 748 // Whether we have issued an error about a non-PIC compilation. |
| 749 bool issued_non_pic_error_; |
| 750 }; |
| 751 |
| 752 // The class which implements relocation. |
| 753 class Relocate |
| 754 { |
| 755 public: |
| 756 // Do a relocation. Return false if the caller should not issue |
| 757 // any warnings about this relocation. |
| 758 inline bool |
| 759 relocate(const Relocate_info<size, big_endian>*, Target_mips*, |
| 760 Output_section*, size_t relnum, |
| 761 const elfcpp::Rel<size, big_endian>&, |
| 762 unsigned int r_type, const Sized_symbol<size>*, |
| 763 const Symbol_value<size>*, |
| 764 unsigned char*, |
| 765 typename elfcpp::Elf_types<size>::Elf_Addr, |
| 766 section_size_type); |
| 767 |
| 768 private: |
| 769 // Do a TLS relocation. |
| 770 inline void |
| 771 relocate_tls(const Relocate_info<size, big_endian>*, |
| 772 Target_mips* target, |
| 773 size_t relnum, const elfcpp::Rel<size, big_endian>&, |
| 774 unsigned int r_type, const Sized_symbol<size>*, |
| 775 const Symbol_value<size>*, |
| 776 unsigned char*, |
| 777 typename elfcpp::Elf_types<size>::Elf_Addr, |
| 778 section_size_type); |
| 779 }; |
| 780 |
| 781 // A class which returns the size required for a relocation type, |
| 782 // used while scanning relocs during a relocatable link. |
| 783 class Relocatable_size_for_reloc |
| 784 { |
| 785 public: |
| 786 unsigned int |
| 787 get_size_for_reloc(unsigned int, Relobj*); |
| 788 }; |
| 789 |
| 790 // Adjust TLS relocation type based on the options and whether this |
| 791 // is a local symbol. |
| 792 static tls::Tls_optimization |
| 793 optimize_tls_reloc(bool is_final, int r_type); |
| 794 |
| 795 // Return whether there is a GOT section. |
| 796 bool |
| 797 has_got_section() const |
| 798 { return this->got_ != NULL; } |
| 799 |
| 800 // Get the GOT section, creating it if necessary. |
| 801 Mips_output_data_got<size, big_endian>* |
| 802 got_section(Symbol_table*, Layout*); |
| 803 |
| 804 Mips_output_data_got<size, big_endian>* |
| 805 got_section() |
| 806 { return this->got_; } |
| 807 |
| 808 // Return processor specific flags |
| 809 elfcpp::Elf_Word |
| 810 processor_specific_flags() const |
| 811 { return this->processor_specific_flags_; } |
| 812 |
| 813 // Set processor specific flags |
| 814 void |
| 815 set_processor_specific_flags(elfcpp::Elf_Word psf) |
| 816 { this->processor_specific_flags_ = psf; } |
| 817 |
| 818 // Check if the given ELF header glags describe a 32-bit binary. |
| 819 bool |
| 820 mips_32bit_flags(elfcpp::Elf_Word); |
| 821 |
| 822 // Check if new architecture extends previous one. |
| 823 bool |
| 824 mips_mach_extends(elfcpp::Elf_Word, elfcpp::Elf_Word); |
| 825 |
| 826 // Merge processor specific flags. |
| 827 void |
| 828 merge_processor_specific_flags(const char*, elfcpp::Elf_Word); |
| 829 |
| 830 // Return the size of the GOT section. |
| 831 section_size_type |
| 832 got_size() const |
| 833 { |
| 834 gold_assert(this->got_ != NULL); |
| 835 return this->got_->data_size(); |
| 836 } |
| 837 |
| 838 // Create a GOT entry for the TLS module index. |
| 839 unsigned int |
| 840 got_mod_index_entry(Symbol_table* symtab, Layout* layout, |
| 841 Sized_relobj_file<size, big_endian>* object); |
| 842 |
| 843 // Create a PLT entry for a global symbol. |
| 844 void |
| 845 make_plt_entry(Symbol_table*, Layout*, Symbol*); |
| 846 |
| 847 // Create a .MIPS.stubs entry for a global symbol. |
| 848 void |
| 849 make_mips_stubs_entry(Symbol_table*, Layout*, Symbol*); |
| 850 |
| 851 // Remove symbol that should not have entry. |
| 852 void |
| 853 remove_stub_entry(Symbol *sym) |
| 854 { |
| 855 if(this->mips_stubs_ != NULL) |
| 856 this->mips_stubs_->remove(sym); |
| 857 } |
| 858 |
| 859 // Create a STUB entry for a global symbol. |
| 860 void |
| 861 make_stub_entry(Layout*); |
| 862 |
| 863 void |
| 864 set_stub_flag() |
| 865 { this->stub_flag_ = true; } |
| 866 |
| 867 bool |
| 868 stub_flag() const |
| 869 { return this->stub_flag_; } |
| 870 |
| 871 // Get the PLT section. |
| 872 const Mips_output_data_plt<size, big_endian>* |
| 873 plt_section() const |
| 874 { |
| 875 gold_assert(this->plt_ != NULL); |
| 876 return this->plt_; |
| 877 } |
| 878 |
| 879 // Get the GOT PLT section. |
| 880 const Mips_output_data_plt<size, big_endian>* |
| 881 got_plt_section() const |
| 882 { |
| 883 gold_assert(this->got_plt_ != NULL); |
| 884 return this->got_plt_; |
| 885 } |
| 886 |
| 887 // Get _gp. |
| 888 Sized_symbol<size>* |
| 889 gp() |
| 890 { return this->gp_; } |
| 891 |
| 892 // Get value of _gp. |
| 893 const typename elfcpp::Elf_types<size>::Elf_Addr |
| 894 gp_address() const |
| 895 { return this->gp_->value(); } |
| 896 |
| 897 // Copy a relocation against a global symbol. |
| 898 void |
| 899 copy_reloc(Symbol_table* symtab, Layout* layout, |
| 900 Sized_relobj_file<size, big_endian>* object, |
| 901 unsigned int shndx, Output_section* output_section, |
| 902 Symbol* sym, const elfcpp::Rel<size, big_endian>& reloc) |
| 903 { |
| 904 this->copy_relocs_.copy_reloc(symtab, layout, |
| 905 symtab->get_sized_symbol<size>(sym), |
| 906 object, shndx, output_section, |
| 907 reloc, this->rel_dyn_section(layout)); |
| 908 } |
| 909 |
| 910 // Calculate value of _gp. |
| 911 void |
| 912 set_gp(Layout*, Symbol_table*); |
| 913 |
| 914 // Get the dynamic reloc section, creating it if necessary. |
| 915 Reloc_section* |
| 916 rel_dyn_section(Layout*); |
| 917 |
| 918 // Add value to MIPS extenstions. |
| 919 void |
| 920 add_extension(unsigned long base, unsigned long extension) |
| 921 { |
| 922 std::pair<unsigned long, unsigned long> ext(base, extension); |
| 923 this->extensions_.push_back(ext); |
| 924 } |
| 925 |
| 926 // The types of GOT entries needed for this platform. |
| 927 // These values are exposed to the ABI in an incremental link. |
| 928 // Do not renumber existing values without changing the version |
| 929 // number of the .gnu_incremental_inputs section. |
| 930 enum Got_type |
| 931 { |
| 932 GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol |
| 933 GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset |
| 934 GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair |
| 935 }; |
| 936 |
| 937 // Information about this specific target which we pass to the |
| 938 // general Target structure. |
| 939 static Target::Target_info mips_info; |
| 940 // The GOT section. |
| 941 Mips_output_data_got<size, big_endian>* got_; |
| 942 // The PLT section. |
| 943 Mips_output_data_plt<size, big_endian>* plt_; |
| 944 // The GOT PLT section. |
| 945 Output_data_space* got_plt_; |
| 946 // The dynamic reloc section. |
| 947 Reloc_section* rel_dyn_; |
| 948 // Relocs saved to avoid a COPY reloc. |
| 949 Copy_relocs<elfcpp::SHT_REL, size, big_endian> copy_relocs_; |
| 950 // Offset of the GOT entry for the TLS module index. |
| 951 unsigned int got_mod_index_offset_; |
| 952 // Value of the _gp |
| 953 Sized_symbol<size>* gp_; |
| 954 // The stub section. |
| 955 Mips_output_data_stub<size, big_endian>* stub_; |
| 956 // Stub flag |
| 957 bool stub_flag_; |
| 958 // Map of stub symbols |
| 959 Stub_symbol_info stub_symbol_; |
| 960 // processor-specific flags in ELF file header. |
| 961 elfcpp::Elf_Word processor_specific_flags_; |
| 962 // Architecture extensions. |
| 963 std::vector<std::pair<unsigned long, unsigned long> > extensions_; |
| 964 // .MIPS.stubs |
| 965 Mips_output_data_mips_stubs<size, big_endian>* mips_stubs_; |
| 966 // .text section |
| 967 Output_section *text_section_; |
| 968 // Layout |
| 969 Layout* layout_; |
| 970 // Symbol table |
| 971 Symbol_table* symtab_; |
| 972 }; |
| 973 |
| 974 // Helper structure for R_MIPS_HI/LO16 and R_MIPS16_HI/LO16 relocations |
| 975 |
| 976 template<int size, bool big_endian> |
| 977 struct hi16 |
| 978 { |
| 979 unsigned char* view; |
| 980 typename elfcpp::Swap<32, big_endian>::Valtype symval; |
| 981 }; |
| 982 |
| 983 template<int size, bool big_endian> |
| 984 class Mips_relocate_functions : public Relocate_functions<size, big_endian> |
| 985 { |
| 986 public: |
| 987 typedef enum |
| 988 { |
| 989 STATUS_OKAY, // No error during relocation. |
| 990 STATUS_OVERFLOW, // Relocation overflow. |
| 991 STATUS_BAD_RELOC // Relocation cannot be applied. |
| 992 } Status; |
| 993 |
| 994 private: |
| 995 typedef Relocate_functions<size, big_endian> Base; |
| 996 typedef Mips_relocate_functions<size, big_endian> This; |
| 997 |
| 998 public: |
| 999 // R_MIPS_16 |
| 1000 static inline typename This::Status |
| 1001 rel16(unsigned char* view, |
| 1002 const Sized_relobj_file<size, big_endian>* object, |
| 1003 const Symbol_value<size>* psymval) |
| 1004 { |
| 1005 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1006 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1007 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1008 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1009 Reltype addend = Bits<16>::sign_extend32(val); |
| 1010 Reltype x = psymval->value(object, addend); |
| 1011 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1012 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1013 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1014 ? This::STATUS_OVERFLOW |
| 1015 : This::STATUS_OKAY); |
| 1016 } |
| 1017 |
| 1018 // R_MIPS_32 |
| 1019 static inline typename This::Status |
| 1020 rel32(unsigned char* view, |
| 1021 const Sized_relobj_file<size, big_endian>* object, |
| 1022 const Symbol_value<size>* psymval) |
| 1023 { |
| 1024 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1025 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1026 Valtype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1027 Valtype x = psymval->value(object, addend); |
| 1028 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1029 return This::STATUS_OKAY; |
| 1030 } |
| 1031 |
| 1032 // R_MIPS_JALR |
| 1033 static inline typename This::Status |
| 1034 reljalr(unsigned char* view, |
| 1035 const Sized_relobj_file<size, big_endian>* object, |
| 1036 const Symbol_value<size>* psymval, |
| 1037 typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 1038 { |
| 1039 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1040 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1041 Valtype instr = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1042 Valtype x = psymval->value(object, 0); |
| 1043 Valtype offset = x - address - 4; |
| 1044 |
| 1045 if(!Bits<17>::has_signed_unsigned_overflow32(offset)) |
| 1046 { |
| 1047 if(instr == 0x0320f809) // jalr t9 |
| 1048 { |
| 1049 // bal addr |
| 1050 Valtype jalr = 0x04110000 | ((offset >> 2) & 0x0000ffffU); |
| 1051 elfcpp::Swap<32, big_endian>::writeval(wv, jalr); |
| 1052 } |
| 1053 else if(instr == 0x03200008) //jr t9 |
| 1054 { |
| 1055 // b addr |
| 1056 Valtype jalr = 0x10000000 | ((offset >> 2) & 0x0000ffffU); |
| 1057 elfcpp::Swap<32, big_endian>::writeval(wv, jalr); |
| 1058 } |
| 1059 } |
| 1060 return This::STATUS_OKAY; |
| 1061 } |
| 1062 |
| 1063 // R_MIPS_REL32, R_MIPS_PC32 |
| 1064 static inline typename This::Status |
| 1065 relrel32(unsigned char* view, |
| 1066 const Sized_relobj_file<size, big_endian>* object, |
| 1067 const Symbol_value<size>* psymval, |
| 1068 typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 1069 { |
| 1070 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1071 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1072 Valtype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1073 Valtype x = (psymval->value(object, addend)) - address; |
| 1074 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1075 return This::STATUS_OKAY; |
| 1076 } |
| 1077 |
| 1078 // R_MIPS_26 |
| 1079 static inline typename This::Status |
| 1080 rel26(unsigned char* view, |
| 1081 const Sized_relobj_file<size, big_endian>* object, |
| 1082 const Symbol_value<size>* psymval, |
| 1083 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 1084 bool local) |
| 1085 { |
| 1086 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1087 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1088 Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1089 Valtype addend; |
| 1090 |
| 1091 if(local) |
| 1092 addend = ((val & 0x03ffffffU) | ((address + 4) & 0xf0000000U)); |
| 1093 else |
| 1094 addend = Bits<26>::sign_extend32(val & 0x03ffffffU); |
| 1095 |
| 1096 Valtype x = psymval->value(object, addend << 2); |
| 1097 val = Bits<32>::bit_select32(val, x >> 2, 0x03ffffffU); |
| 1098 elfcpp::Swap<32, big_endian>::writeval(wv, val); |
| 1099 return This::STATUS_OKAY; |
| 1100 } |
| 1101 |
| 1102 // R_MIPS_SHIFT5 |
| 1103 static inline typename This::Status |
| 1104 relsh5(unsigned char* view, |
| 1105 const Sized_relobj_file<size, big_endian>* object, |
| 1106 const Symbol_value<size>* psymval) |
| 1107 { |
| 1108 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1109 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1110 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1111 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1112 Reltype addend = Bits<11>::sign_extend32(val & 0x000007c0U); |
| 1113 Reltype x = psymval->value(object, addend); |
| 1114 val = Bits<11>::bit_select32(val, x, 0x000007c0U); |
| 1115 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1116 return ((Bits<11>::has_signed_unsigned_overflow32(x) || ((x & 0x3fU) != 0)) |
| 1117 ? This::STATUS_OVERFLOW |
| 1118 : This::STATUS_OKAY); |
| 1119 } |
| 1120 |
| 1121 // R_MIPS_SHIFT6 |
| 1122 static inline typename This::Status |
| 1123 relsh6(unsigned char* view, |
| 1124 const Sized_relobj_file<size, big_endian>* object, |
| 1125 const Symbol_value<size>* psymval) |
| 1126 { |
| 1127 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1128 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1129 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1130 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1131 Reltype addend = Bits<11>::sign_extend32(val & 0x000007c0U) |
| 1132 || ((val & 0x00004U) << 2); |
| 1133 Reltype x = psymval->value(object, addend); |
| 1134 x = (x & ~0x00000020U) | ((x & 0x00000020U) >> 2); |
| 1135 val = Bits<16>::bit_select32(val, x, 0x000007c4U); |
| 1136 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1137 return ((Bits<11>::has_signed_unsigned_overflow32(x) || ((x & 0x37U) != 0)) |
| 1138 ? This::STATUS_OVERFLOW |
| 1139 : This::STATUS_OKAY); |
| 1140 } |
| 1141 |
| 1142 // R_MIPS_SUB |
| 1143 static inline typename This::Status |
| 1144 relsub(unsigned char* view, |
| 1145 const Sized_relobj_file<size, big_endian>* object, |
| 1146 const Symbol_value<size>* psymval) |
| 1147 { |
| 1148 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 1149 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1150 Valtype addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1151 Valtype x = (psymval->value(object, -addend)); |
| 1152 elfcpp::Swap<64, big_endian>::writeval(wv, x); |
| 1153 return This::STATUS_OKAY; |
| 1154 } |
| 1155 |
| 1156 // R_MIPS_HIGHER |
| 1157 static inline typename This::Status |
| 1158 relhigher(unsigned char* view, |
| 1159 const Sized_relobj_file<size, big_endian>* object, |
| 1160 const Symbol_value<size>* psymval) |
| 1161 { |
| 1162 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 1163 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1164 Valtype addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1165 Valtype x = (((Valtype)(psymval->value(object, addend) + 0x80008000) >> 32) |
| 1166 & 0xffffU); |
| 1167 elfcpp::Swap<64, big_endian>::writeval(wv, x); |
| 1168 return This::STATUS_OKAY; |
| 1169 } |
| 1170 |
| 1171 // R_MIPS_HIGHEST |
| 1172 static inline typename This::Status |
| 1173 relhighest(unsigned char* view, |
| 1174 const Sized_relobj_file<size, big_endian>* object, |
| 1175 const Symbol_value<size>* psymval) |
| 1176 { |
| 1177 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 1178 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1179 Valtype addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1180 Valtype x = (((Valtype)(psymval->value(object, addend) + 0x800080008000) |
| 1181 >> 48) & 0xffffU); |
| 1182 elfcpp::Swap<64, big_endian>::writeval(wv, x); |
| 1183 return This::STATUS_OKAY; |
| 1184 } |
| 1185 |
| 1186 // R_MIPS_SCN_DISP |
| 1187 static inline typename This::Status |
| 1188 relscndisp(unsigned char* view, |
| 1189 const Sized_relobj_file<size, big_endian>* object, |
| 1190 const Symbol_value<size>* psymval, |
| 1191 typename elfcpp::Elf_types<size>::Elf_Off offset) |
| 1192 { |
| 1193 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1194 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1195 Valtype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1196 Valtype x = (psymval->value(object, addend)) - offset; |
| 1197 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1198 return This::STATUS_OKAY; |
| 1199 } |
| 1200 |
| 1201 // R_MIPS_PC16, R_MIPS_GNU_REL16_S2 |
| 1202 static inline typename This::Status |
| 1203 relpc16(unsigned char* view, |
| 1204 const Sized_relobj_file<size, big_endian>* object, |
| 1205 const Symbol_value<size>* psymval, |
| 1206 typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 1207 { |
| 1208 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1209 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1210 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1211 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1212 Reltype addend = Bits<16>::sign_extend32(val); |
| 1213 Reltype x = psymval->value(object, addend) - address; |
| 1214 val = Bits<16>::bit_select32(val, x >> 2, 0x0000ffffU); |
| 1215 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1216 return (Bits<18>::has_signed_unsigned_overflow32(x) |
| 1217 ? This::STATUS_OVERFLOW |
| 1218 : This::STATUS_OKAY); |
| 1219 } |
| 1220 |
| 1221 // R_MIPS_HI16, R_MIPS16_HI16, R_MIPS_GOT16, R_MIPS16_GOT16 |
| 1222 static inline typename This::Status |
| 1223 relhi16(unsigned char* view, |
| 1224 typename elfcpp::Swap<32, big_endian>::Valtype symval) |
| 1225 { |
| 1226 struct hi16<size, big_endian>* _hi16 = new hi16<size, big_endian>; |
| 1227 |
| 1228 if(!_hi16) |
| 1229 return This::STATUS_OVERFLOW; |
| 1230 |
| 1231 _hi16->view = view; |
| 1232 _hi16->symval = symval; |
| 1233 |
| 1234 This::hi16_list.push_back(_hi16); |
| 1235 return This::STATUS_OKAY; |
| 1236 } |
| 1237 |
| 1238 // R_MIPS_LO16, R_MIPS16_LO16 |
| 1239 static inline typename This::Status |
| 1240 rello16(unsigned char* view, |
| 1241 const Sized_relobj_file<size, big_endian>* object, |
| 1242 const Symbol_value<size>* psymval) |
| 1243 { |
| 1244 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1245 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1246 Valtype* wvlo = reinterpret_cast<Valtype*>(view), *wv; |
| 1247 Valtype vallo = elfcpp::Swap<16, big_endian>::readval(wvlo), val; |
| 1248 Reltype addendlo = Bits<16>::sign_extend32(vallo), addend; |
| 1249 Reltype x, xlo = psymval->value(object, addendlo); |
| 1250 vallo = Bits<16>::bit_select32(vallo, xlo, 0x0000ffffU); |
| 1251 |
| 1252 while(hi16_list.size()) |
| 1253 { |
| 1254 struct hi16<size, big_endian>* _hi16 = hi16_list.back(); |
| 1255 wv = reinterpret_cast<Valtype*>(_hi16->view); |
| 1256 addend = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1257 |
| 1258 x = _hi16->symval + addendlo + (addend << 16); |
| 1259 x += 0x00008000U; |
| 1260 x >>= 16; |
| 1261 |
| 1262 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1263 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1264 |
| 1265 free(_hi16); |
| 1266 This::hi16_list.pop_back(); |
| 1267 }; |
| 1268 |
| 1269 elfcpp::Swap<16, big_endian>::writeval(wvlo, vallo); |
| 1270 return This::STATUS_OKAY; |
| 1271 } |
| 1272 |
| 1273 //R_MIPS_64 |
| 1274 static inline typename This::Status |
| 1275 rel64(unsigned char* view, |
| 1276 const Sized_relobj_file<size, big_endian>* object, |
| 1277 const Symbol_value<size>* psymval) |
| 1278 { |
| 1279 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 1280 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1281 Valtype addend = elfcpp::Swap<64, big_endian>::readval(wv); |
| 1282 Valtype x = psymval->value(object, addend); |
| 1283 elfcpp::Swap<64, big_endian>::writeval(wv, x); |
| 1284 return This::STATUS_OKAY; |
| 1285 } |
| 1286 static typename std::vector<struct hi16<size, big_endian> *> hi16_list; |
| 1287 |
| 1288 // R_MIPS_GOT_DISP, R_MIPS_GOT_PAGE, |
| 1289 // R_MIPS_TLS_GOTTPREL, R_MIPS_TLS_GD, R_MIPS_TLS_LDM |
| 1290 static inline typename This::Status |
| 1291 relgotofst(unsigned char* view, |
| 1292 typename elfcpp::Swap<32, big_endian>::Valtype got_offset) |
| 1293 { |
| 1294 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1295 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1296 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1297 Reltype x = got_offset; |
| 1298 elfcpp::Swap<16, big_endian>::writeval(wv, x); |
| 1299 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1300 ? This::STATUS_OVERFLOW |
| 1301 : This::STATUS_OKAY); |
| 1302 } |
| 1303 |
| 1304 // R_MIPS_GOT16, R_MIPS16_GOT16 |
| 1305 static inline typename This::Status |
| 1306 relgot16(unsigned char* view, |
| 1307 const Sized_relobj_file<size, big_endian>* object, |
| 1308 const Symbol_value<size>* psymval, |
| 1309 const typename elfcpp::Swap<size, big_endian>::Valtype _gp, |
| 1310 unsigned char* got_view, |
| 1311 const typename elfcpp::Swap<size, big_endian>::Valtype got_address, |
| 1312 const typename elfcpp::Swap<size, big_endian>::Valtype got_offset, |
| 1313 const Sized_symbol<size>* gsym) |
| 1314 { |
| 1315 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1316 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1317 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1318 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1319 Reltype x = got_address - _gp; |
| 1320 |
| 1321 if(gsym != NULL) |
| 1322 // TODO AS: Constant GOT_TYPE_STANDARD should be used. |
| 1323 x += gsym->got_offset(0); |
| 1324 else |
| 1325 { |
| 1326 Valtype addend = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1327 |
| 1328 // got_view points to beggining of location, data is written |
| 1329 // in the second half |
| 1330 relhi16(got_view + 2, psymval->value(object, addend << 16)); |
| 1331 x = got_address + got_offset - _gp; |
| 1332 } |
| 1333 |
| 1334 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1335 |
| 1336 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1337 |
| 1338 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1339 ? This::STATUS_OVERFLOW |
| 1340 : This::STATUS_OKAY); |
| 1341 } |
| 1342 |
| 1343 // R_MIPS_GPREL16, R_MIPS16_GPREL and R_MIPS_LITERAL |
| 1344 static inline typename This::Status |
| 1345 relgprel(unsigned char* view, |
| 1346 const Sized_relobj_file<size, big_endian>* object, |
| 1347 const Symbol_value<size>* psymval, |
| 1348 const typename elfcpp::Swap<size, big_endian>::Valtype _gp) |
| 1349 { |
| 1350 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1351 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1352 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1353 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1354 Reltype addend = Bits<16>::sign_extend32(val); |
| 1355 Reltype x = psymval->value(object, addend) - _gp; |
| 1356 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1357 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1358 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1359 ? This::STATUS_OVERFLOW |
| 1360 : This::STATUS_OKAY); |
| 1361 } |
| 1362 |
| 1363 // R_MIPS_GPREL32 |
| 1364 static inline typename This::Status |
| 1365 relgprel32(unsigned char* view, |
| 1366 const Sized_relobj_file<size, big_endian>* object, |
| 1367 const Symbol_value<size>* psymval, |
| 1368 const typename elfcpp::Swap<size, big_endian>::Valtype gp) |
| 1369 { |
| 1370 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1371 size_t sec_num; |
| 1372 for(sec_num = 0; sec_num < object->shnum(); sec_num++) |
| 1373 if(((Object*)object)->section_type(sec_num) == elfcpp::SHT_MIPS_REGINFO) |
| 1374 break; |
| 1375 |
| 1376 gold::section_size_type section_size = 24; |
| 1377 const unsigned char* reginfo = ((Object*)object)->section_contents(sec_num, |
| 1378 §ion_size, false) + 20; |
| 1379 const Valtype* ri = reinterpret_cast<const Valtype*>(reginfo); |
| 1380 Valtype gp0 = elfcpp::Swap<32, big_endian>::readval(ri); |
| 1381 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1382 Valtype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1383 Valtype x = (psymval->value(object, addend)) + gp0 - gp; |
| 1384 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1385 return This::STATUS_OKAY; |
| 1386 } |
| 1387 |
| 1388 // R_MIPS_GLOB_DAT |
| 1389 static inline typename This::Status |
| 1390 relglob(unsigned char* view, |
| 1391 const Sized_relobj_file<size, big_endian>* object, |
| 1392 const Symbol_value<size>* psymval) |
| 1393 { |
| 1394 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1395 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1396 elfcpp::Swap<32, big_endian>::writeval(wv, psymval->value(object, 0)); |
| 1397 return This::STATUS_OKAY; |
| 1398 } |
| 1399 |
| 1400 // R_MIPS_TLS_TPREL32, R_MIPS_TLS_DTPREL32 |
| 1401 static inline typename This::Status |
| 1402 tlsrel32(unsigned char* view, |
| 1403 const Sized_relobj_file<size, big_endian>* object, |
| 1404 const Symbol_value<size>* psymval, |
| 1405 const typename elfcpp::Swap<32, big_endian>::Valtype offset) |
| 1406 { |
| 1407 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 1408 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1409 Valtype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 1410 Valtype x = psymval->value(object, addend) - offset; |
| 1411 elfcpp::Swap<32, big_endian>::writeval(wv, x); |
| 1412 return This::STATUS_OKAY; |
| 1413 } |
| 1414 |
| 1415 // R_MIPS_TLS_TPREL_LO16, R_MIPS_TLS_DTPREL_LO16 |
| 1416 static inline typename This::Status |
| 1417 tlsrello16(unsigned char* view, |
| 1418 const Sized_relobj_file<size, big_endian>* object, |
| 1419 const Symbol_value<size>* psymval, |
| 1420 const typename elfcpp::Swap<32, big_endian>::Valtype offset) |
| 1421 { |
| 1422 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1423 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1424 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1425 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1426 Reltype addend = Bits<16>::sign_extend32(val); |
| 1427 Reltype x = psymval->value(object, addend) - offset; |
| 1428 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1429 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1430 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1431 ? This::STATUS_OVERFLOW |
| 1432 : This::STATUS_OKAY); |
| 1433 } |
| 1434 |
| 1435 // R_MIPS_TLS_TPREL_HI16, R_MIPS_TLS_DTPREL_HI16 |
| 1436 static inline typename This::Status |
| 1437 tlsrelhi16(unsigned char* view, |
| 1438 const Sized_relobj_file<size, big_endian>* object, |
| 1439 const Symbol_value<size>* psymval, |
| 1440 const typename elfcpp::Swap<32, big_endian>::Valtype offset) |
| 1441 { |
| 1442 typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype; |
| 1443 typedef typename elfcpp::Swap<32, big_endian>::Valtype Reltype; |
| 1444 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1445 Valtype val = elfcpp::Swap<16, big_endian>::readval(wv); |
| 1446 Reltype addend = Bits<16>::sign_extend32(val); |
| 1447 Reltype x = ((psymval->value(object, addend) - offset) + 0x8000U) >> 16; |
| 1448 val = Bits<16>::bit_select32(val, x, 0x0000ffffU); |
| 1449 elfcpp::Swap<16, big_endian>::writeval(wv, val); |
| 1450 return (Bits<16>::has_signed_unsigned_overflow32(x) |
| 1451 ? This::STATUS_OVERFLOW |
| 1452 : This::STATUS_OKAY); |
| 1453 } |
| 1454 }; |
| 1455 |
| 1456 template<int size> |
| 1457 void |
| 1458 Mips_output_section_reginfo<size>::set_final_data_size() |
| 1459 { |
| 1460 // Set data size. |
| 1461 this->set_data_size(24); |
| 1462 } |
| 1463 |
| 1464 template<int size> |
| 1465 void |
| 1466 Mips_output_section_reginfo<size>::do_write(Output_file* of) |
| 1467 { |
| 1468 // Set output data |
| 1469 for (Input_section_list::const_iterator p = this->input_sections().begin(); |
| 1470 p != this->input_sections().end(); |
| 1471 ++p) |
| 1472 { |
| 1473 unsigned int shndx = p->shndx(); |
| 1474 Relobj* relobj = p->relobj(); |
| 1475 |
| 1476 section_size_type section_size; |
| 1477 const unsigned char* section_contents = |
| 1478 relobj->section_contents(shndx, §ion_size, false); |
| 1479 |
| 1480 for(size_t i = 0; i < 20; i++) |
| 1481 this->data_[i] |= section_contents[i]; |
| 1482 } |
| 1483 |
| 1484 unsigned long gp_val = 0; |
| 1485 if(this->gp_ != NULL) |
| 1486 gp_val = this->gp_->value(); |
| 1487 |
| 1488 this->data_[20]=gp_val & 0xff; |
| 1489 this->data_[21]=(gp_val >> 8) & 0xff; |
| 1490 this->data_[22]=(gp_val >> 16) & 0xff; |
| 1491 this->data_[23]=(gp_val >> 24) & 0xff; |
| 1492 |
| 1493 off_t offset = this->offset(); |
| 1494 off_t data_size = this->data_size(); |
| 1495 |
| 1496 unsigned char* view = of->get_output_view(offset, data_size); |
| 1497 memcpy(view, this->data_, data_size); |
| 1498 of->write_output_view(offset, data_size, view); |
| 1499 } |
| 1500 |
| 1501 // Return the value to use for a dynamic symbol which requires special |
| 1502 // treatment. This is how we support equality comparisons of function |
| 1503 // pointers across shared library boundaries, as described in the |
| 1504 // processor specific ABI supplement. |
| 1505 |
| 1506 template<int size, bool big_endian> |
| 1507 uint64_t |
| 1508 Target_mips<size, big_endian>::do_dynsym_value(const Symbol* gsym) const |
| 1509 { |
| 1510 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); |
| 1511 |
| 1512 if(gsym->plt_offset() == 0) |
| 1513 return 0; |
| 1514 |
| 1515 if((this->mips_stubs() == NULL) || |
| 1516 (this->mips_stubs()->is_plt_symbol((Sized_symbol<size> *)gsym))) |
| 1517 return this->plt_section()->address() + gsym->plt_offset(); |
| 1518 else |
| 1519 return this->mips_stubs()->address() + |
| 1520 gsym->plt_offset() * (this->mips_stubs()->big_dyn_symtab() ? 20 : 16); |
| 1521 } |
| 1522 |
| 1523 template<int size, bool big_endian> |
| 1524 typename std::vector<struct hi16<size, big_endian> *> |
| 1525 Mips_relocate_functions<size, big_endian>::hi16_list; |
| 1526 |
| 1527 // Get the dynamic reloc section, creating it if necessary. |
| 1528 |
| 1529 template<int size, bool big_endian> |
| 1530 typename Target_mips<size, big_endian>::Reloc_section* |
| 1531 Target_mips<size, big_endian>::rel_dyn_section(Layout* layout) |
| 1532 { |
| 1533 if (this->rel_dyn_ == NULL) |
| 1534 { |
| 1535 gold_assert(layout != NULL); |
| 1536 this->rel_dyn_ = new Reloc_section(parameters->options().combreloc()); |
| 1537 layout->add_output_section_data(".rel.dyn", elfcpp::SHT_REL, |
| 1538 elfcpp::SHF_ALLOC, this->rel_dyn_, |
| 1539 ORDER_DYNAMIC_RELOCS, false); |
| 1540 } |
| 1541 return this->rel_dyn_; |
| 1542 } |
| 1543 |
| 1544 // Get the GOT section, creating it if necessary. |
| 1545 |
| 1546 template<int size, bool big_endian> |
| 1547 Mips_output_data_got<size, big_endian>* |
| 1548 Target_mips<size, big_endian>::got_section(Symbol_table* symtab, |
| 1549 Layout* layout) |
| 1550 { |
| 1551 if (this->got_ == NULL) |
| 1552 { |
| 1553 gold_assert(symtab != NULL && layout != NULL); |
| 1554 |
| 1555 this->got_ = new Mips_output_data_got<size, big_endian>(symtab, layout); |
| 1556 |
| 1557 this->got_plt_ = new Output_data_space(4, "** GOT PLT"); |
| 1558 |
| 1559 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, |
| 1560 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE | |
| 1561 elfcpp::SHF_MIPS_GPREL, |
| 1562 this->got_, ORDER_DATA, false); |
| 1563 |
| 1564 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. |
| 1565 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
| 1566 Symbol_table::PREDEFINED, |
| 1567 this->got_, |
| 1568 0, 0, elfcpp::STT_OBJECT, |
| 1569 elfcpp::STB_GLOBAL, |
| 1570 elfcpp::STV_DEFAULT, 0, |
| 1571 false, false); |
| 1572 } |
| 1573 |
| 1574 // Set _gp value, too. |
| 1575 this->set_gp(layout, symtab); |
| 1576 |
| 1577 return this->got_; |
| 1578 } |
| 1579 |
| 1580 template<int size, bool big_endian> |
| 1581 void |
| 1582 Mips_output_data_got<size, big_endian>::add_tls_gd_with_static_reloc( |
| 1583 unsigned int got_type, |
| 1584 Symbol* gsym) |
| 1585 { |
| 1586 if (gsym->has_got_offset(got_type)) |
| 1587 return; |
| 1588 |
| 1589 // We are doing a static link. Just mark it as belong to module 1, |
| 1590 // the executable. |
| 1591 unsigned int got_offset = this->add_constant(1); |
| 1592 gsym->set_got_offset(got_type, got_offset); |
| 1593 got_offset = this->add_constant(0); |
| 1594 this->static_relocs_.push_back(Static_reloc(got_offset, |
| 1595 size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 : elfcpp::R_MIPS_TLS_DTPREL64, |
| 1596 gsym)); |
| 1597 } |
| 1598 |
| 1599 template<int size, bool big_endian> |
| 1600 void |
| 1601 Mips_output_data_got<size, big_endian>::add_tls_gd_local_reloc( |
| 1602 unsigned int got_type, |
| 1603 Sized_relobj_file<size, big_endian>* object, |
| 1604 unsigned int index) |
| 1605 { |
| 1606 if (object->local_has_got_offset(index, got_type)) |
| 1607 return; |
| 1608 |
| 1609 unsigned int got_offset = this->add_constant(1); |
| 1610 object->set_local_got_offset(index, got_type, got_offset); |
| 1611 got_offset = this->add_constant(0); |
| 1612 this->static_relocs_.push_back(Static_reloc(got_offset, |
| 1613 size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 : elfcpp::R_MIPS_TLS_DTPREL64, |
| 1614 object, index)); |
| 1615 } |
| 1616 |
| 1617 // Calculate value of gp_. |
| 1618 |
| 1619 template<int size, bool big_endian> |
| 1620 void |
| 1621 Target_mips<size, big_endian>::set_gp(Layout* layout, Symbol_table* symtab) |
| 1622 { |
| 1623 if(gp_ == NULL) |
| 1624 { |
| 1625 Sized_symbol<size>* sym = |
| 1626 static_cast<Sized_symbol<size>*>(symtab->lookup("_gp")); |
| 1627 |
| 1628 if((sym == NULL) || (sym->source() != Symbol::IS_CONSTANT)) |
| 1629 { |
| 1630 Output_data *got_section = layout->find_output_section(".got"); |
| 1631 |
| 1632 gold_assert(got_section != NULL); |
| 1633 |
| 1634 if(sym == NULL) |
| 1635 sym =static_cast<Sized_symbol<size>*>(symtab->define_in_output_data( |
| 1636 "_gp", NULL, Symbol_table::PREDEFINED, |
| 1637 got_section, 0x7ff0, 0, |
| 1638 elfcpp::STT_OBJECT, |
| 1639 elfcpp::STB_GLOBAL, |
| 1640 elfcpp::STV_DEFAULT, |
| 1641 0, false, false)); |
| 1642 else |
| 1643 { |
| 1644 sym->init_output_data("_gp", NULL, got_section, 0x7ff0, 0, |
| 1645 elfcpp::STT_OBJECT, |
| 1646 elfcpp::STB_GLOBAL, |
| 1647 elfcpp::STV_DEFAULT, 0, |
| 1648 false, false); |
| 1649 } |
| 1650 gold_assert(sym != NULL); |
| 1651 } |
| 1652 |
| 1653 this->gp_ = sym; |
| 1654 } |
| 1655 } |
| 1656 |
| 1657 // A class to handle the STUB data. |
| 1658 |
| 1659 template<int size, bool big_endian> |
| 1660 class Mips_output_data_stub : public Output_section_data |
| 1661 { |
| 1662 public: |
| 1663 typedef std::vector<Symbol *> symbol_list; |
| 1664 Mips_output_data_stub(); |
| 1665 |
| 1666 // Add an entry to the STUB. |
| 1667 void add_entry(Symbol_table* symtab, |
| 1668 Target_mips<size, big_endian>* target, |
| 1669 Symbol* gsym); |
| 1670 |
| 1671 // Return the number of STUB entries. |
| 1672 unsigned int |
| 1673 entry_count() const |
| 1674 { return this->count_; } |
| 1675 |
| 1676 // Add stub symbol |
| 1677 void |
| 1678 add_symbol(Symbol *sym) |
| 1679 { symbols.push_back(sym); } |
| 1680 |
| 1681 // Get symbol on position n |
| 1682 Symbol * |
| 1683 symbol(unsigned int n) |
| 1684 { return symbols[n]; } |
| 1685 |
| 1686 protected: |
| 1687 void do_adjust_output_section(Output_section* os); |
| 1688 |
| 1689 private: |
| 1690 // Template for subsequent STUB entries. |
| 1691 static const uint32_t stub_entry[4]; |
| 1692 |
| 1693 // Set the final size. |
| 1694 void |
| 1695 set_final_data_size() |
| 1696 { |
| 1697 unsigned int full_count = this->count_ * 4; |
| 1698 |
| 1699 this->set_data_size(full_count * 4); |
| 1700 } |
| 1701 |
| 1702 // Write out the STUB data. |
| 1703 void |
| 1704 do_write(Output_file*); |
| 1705 |
| 1706 // The number of STUB entries. |
| 1707 unsigned int count_; |
| 1708 |
| 1709 // List of symbols used in stubs |
| 1710 symbol_list symbols; |
| 1711 }; |
| 1712 |
| 1713 // A class to handle the PLT data. |
| 1714 |
| 1715 template<int size, bool big_endian> |
| 1716 class Mips_output_data_plt : public Output_section_data |
| 1717 { |
| 1718 public: |
| 1719 typedef Output_data_reloc<elfcpp::SHT_REL, true, |
| 1720 size, big_endian> Reloc_section; |
| 1721 |
| 1722 Mips_output_data_plt(Layout*, Output_data_space*); |
| 1723 |
| 1724 // Add an entry to the PLT. |
| 1725 void add_entry(Symbol* gsym); |
| 1726 |
| 1727 // Return the .rel.plt section data. |
| 1728 const Reloc_section* rel_plt() const |
| 1729 { return this->rel_; } |
| 1730 |
| 1731 // Return the number of PLT entries. |
| 1732 unsigned int |
| 1733 entry_count() const |
| 1734 { return this->count_; } |
| 1735 |
| 1736 // Return the offset of the first non-reserved PLT entry. |
| 1737 static unsigned int |
| 1738 first_plt_entry_offset() |
| 1739 { return sizeof(first_plt_entry[0]); } |
| 1740 |
| 1741 // Return the size of a PLT entry. |
| 1742 static unsigned int |
| 1743 plt_entry_size() |
| 1744 { return sizeof(plt_entry); } |
| 1745 |
| 1746 protected: |
| 1747 void do_adjust_output_section(Output_section* os); |
| 1748 |
| 1749 // Write to a map file. |
| 1750 void |
| 1751 do_print_to_mapfile(Mapfile* mapfile) const |
| 1752 { mapfile->print_output_data(this, _(".plt")); } |
| 1753 |
| 1754 private: |
| 1755 // Template for the first PLT entry. |
| 1756 static const uint32_t first_plt_entry[3][8]; |
| 1757 |
| 1758 // Template for subsequent PLT entries. |
| 1759 static const uint32_t plt_entry[4]; |
| 1760 |
| 1761 // Set the final size. |
| 1762 void |
| 1763 set_final_data_size() |
| 1764 { |
| 1765 unsigned int full_count = this->count_ * 4 + 8; |
| 1766 |
| 1767 this->set_data_size(full_count * 4); |
| 1768 } |
| 1769 |
| 1770 // MIPS abi types |
| 1771 enum Abi_type |
| 1772 { |
| 1773 MIPS_ABI_ERROR = -1, // Error when getting ABI type |
| 1774 MIPS_O32 = 0, // Mips O32 ABI |
| 1775 MIPS_N32 = 1, // Mips N32 ABI |
| 1776 MIPS_N64 = 2, // Mips N64 ABI |
| 1777 MIPS_O64 = 3, // Mips O64 ABI |
| 1778 MIPS_EABI32 = 4, // Mips 32 EABI |
| 1779 MIPS_EABI64 = 5, // Mips 64 EABI |
| 1780 }; |
| 1781 |
| 1782 // Get MIPS abi |
| 1783 Abi_type |
| 1784 abi(elfcpp::Elf_Word /*flags*/) const |
| 1785 { |
| 1786 #if 0 |
| 1787 // MIPS ABI2 |
| 1788 if((flags & elfcpp::EF_MIPS_ABI2) != 0) |
| 1789 { |
| 1790 switch(flags & elfcpp::EF_MIPS_ABI) |
| 1791 { |
| 1792 case elfcpp::E_MIPS_ABI_O32: |
| 1793 return MIPS_N32; |
| 1794 case elfcpp::E_MIPS_ABI_O64: |
| 1795 return MIPS_N64; |
| 1796 case elfcpp::E_MIPS_ABI_EABI32: |
| 1797 return MIPS_EABI32; // TODO AS: Check if this is correct!!!! |
| 1798 case elfcpp::E_MIPS_ABI_EABI64: |
| 1799 return MIPS_EABI64; // TODO AS: Check if this is correct!!!! |
| 1800 default: |
| 1801 return MIPS_ABI_ERROR; |
| 1802 } |
| 1803 } |
| 1804 else |
| 1805 { |
| 1806 switch(flags & elfcpp::EF_MIPS_ABI) |
| 1807 { |
| 1808 case elfcpp::E_MIPS_ABI_O32: |
| 1809 return MIPS_O32; |
| 1810 case elfcpp::E_MIPS_ABI_O64: |
| 1811 return MIPS_O64; |
| 1812 case elfcpp::E_MIPS_ABI_EABI32: |
| 1813 return MIPS_EABI32; // TODO AS: Check if this is correct!!!! |
| 1814 case elfcpp:: E_MIPS_ABI_EABI64: |
| 1815 return MIPS_EABI64; // TODO AS: Check if this is correct!!!! |
| 1816 default: |
| 1817 return MIPS_ABI_ERROR; |
| 1818 } |
| 1819 } |
| 1820 #endif |
| 1821 // TODO AS: For now only support O32 ABI |
| 1822 return MIPS_O32; |
| 1823 } |
| 1824 |
| 1825 // Write out the PLT data. |
| 1826 void |
| 1827 do_write(Output_file*); |
| 1828 |
| 1829 // The reloc section. |
| 1830 Reloc_section* rel_; |
| 1831 // The .got.plt section. |
| 1832 Output_data_space* got_plt_; |
| 1833 // The number of PLT entries. |
| 1834 unsigned int count_; |
| 1835 }; |
| 1836 |
| 1837 // A class to handle the .MIPS.stubs data. |
| 1838 |
| 1839 template<int size, bool big_endian> |
| 1840 class Mips_output_data_mips_stubs : public Output_section_data |
| 1841 { |
| 1842 public: |
| 1843 Mips_output_data_mips_stubs(Layout* layout, |
| 1844 Mips_output_data_got<size, big_endian>* got, Sized_symbol<size>* gp) |
| 1845 : Output_section_data(size == 32 ? 4 : 8), count_(1), got_(got), gp_(gp), |
| 1846 layout_(layout), big_dyn_symtab_(false) |
| 1847 { }; |
| 1848 |
| 1849 // Add an entry to the .MIPS.stubs. |
| 1850 void add_entry(Symbol* gsym); |
| 1851 |
| 1852 // Return the number of .MIPS.stubs entries. |
| 1853 unsigned int |
| 1854 entry_count() const |
| 1855 { return this->count_; } |
| 1856 |
| 1857 // Return if symbol is in .plt |
| 1858 bool |
| 1859 is_plt_symbol(Sized_symbol<size> *sym) |
| 1860 { |
| 1861 if(this->symbols_.size() == 0) |
| 1862 return true; |
| 1863 |
| 1864 return (this->symbols_.count(sym) == 0); |
| 1865 } |
| 1866 |
| 1867 // Remove symbol that should not have entry. |
| 1868 void |
| 1869 remove(Symbol *sym) |
| 1870 { |
| 1871 if(this->symbols_.size() == 0) |
| 1872 return; |
| 1873 |
| 1874 if(this->symbols_.count(sym) == 0) |
| 1875 return; |
| 1876 |
| 1877 this->symbols_.erase(sym); |
| 1878 --this->count_; |
| 1879 } |
| 1880 |
| 1881 // Set if dynamic symbole table has more then 0x10000 entries. |
| 1882 void |
| 1883 set_big_dyn_symtab(bool big_dyn_symtab) |
| 1884 { big_dyn_symtab_ = big_dyn_symtab; } |
| 1885 |
| 1886 // If dynamic symbole table has more then 0x10000 entries. |
| 1887 bool |
| 1888 big_dyn_symtab() |
| 1889 { return this->big_dyn_symtab_; } |
| 1890 |
| 1891 // Fix values of used symbols in symbol table. |
| 1892 void |
| 1893 fix_symbol_values(); |
| 1894 |
| 1895 protected: |
| 1896 void do_adjust_output_section(Output_section* os); |
| 1897 |
| 1898 // Write to a map file. |
| 1899 void |
| 1900 do_print_to_mapfile(Mapfile* mapfile) const |
| 1901 { mapfile->print_output_data(this, _(".MIPS.stubs")); } |
| 1902 |
| 1903 private: |
| 1904 // Template for the .MIPS.stubs instructions. |
| 1905 // lw t9, .got offset from _gp |
| 1906 unsigned long |
| 1907 stub_lw() |
| 1908 { return 0x8f990000 | ((this->got_->address() - this->gp_->value()) & 0xffff)
; } |
| 1909 |
| 1910 // addu t7,ra |
| 1911 unsigned long |
| 1912 stub_move() |
| 1913 { return 0x03e07821; } |
| 1914 |
| 1915 // lui t8,val |
| 1916 unsigned long |
| 1917 stub_lui(int val) |
| 1918 { return (0x3c180000 + (val & 0xffff)); } |
| 1919 |
| 1920 //jalr t9,ra |
| 1921 unsigned long |
| 1922 stub_jalr() |
| 1923 { return 0x0320f809; } |
| 1924 |
| 1925 // ori t8,t8,val |
| 1926 unsigned long |
| 1927 stub_ori(int val) |
| 1928 { return (0x37180000 + (val & 0xffff)); } |
| 1929 |
| 1930 // ori t8,zero,val unsigned |
| 1931 unsigned long |
| 1932 stub_li16u(int val) |
| 1933 { return (0x34180000 + (val & 0xffff)); } |
| 1934 |
| 1935 // addiu t8,zero,val sign extended |
| 1936 unsigned long |
| 1937 stub_li16s(int val) |
| 1938 { return (0x24180000 + (val & 0xffff)); } |
| 1939 |
| 1940 // Set the final size. |
| 1941 void |
| 1942 set_final_data_size() |
| 1943 { |
| 1944 unsigned int full_count = this->count_ * (this->big_dyn_symtab_ ? 5 : 4); |
| 1945 |
| 1946 this->set_data_size(full_count * 4); |
| 1947 } |
| 1948 |
| 1949 // Write out the .MIPS.stubs data. |
| 1950 void |
| 1951 do_write(Output_file*); |
| 1952 |
| 1953 // The number of .MIPS.stubs entries. |
| 1954 unsigned int count_; |
| 1955 // .got section |
| 1956 Mips_output_data_got<size, big_endian>* got_; |
| 1957 // _gp symbol |
| 1958 Sized_symbol<size>* gp_; |
| 1959 // Layout |
| 1960 Layout* layout_; |
| 1961 // Set if dynamic symbol table has more then 0x10000 entries. |
| 1962 bool big_dyn_symtab_; |
| 1963 // .MIPS.stubs symbols |
| 1964 std::set<Symbol *> symbols_; |
| 1965 }; |
| 1966 |
| 1967 template<int size, bool big_endian> |
| 1968 void |
| 1969 Mips_output_data_mips_stubs<size, big_endian>::do_adjust_output_section( |
| 1970 Output_section* os) |
| 1971 { os->set_entsize(0); } |
| 1972 |
| 1973 // Add an entry to the .MIPS.stubs. |
| 1974 |
| 1975 template<int size, bool big_endian> |
| 1976 void |
| 1977 Mips_output_data_mips_stubs<size, big_endian>::add_entry(Symbol* sym) |
| 1978 { |
| 1979 gold_assert(!sym->has_plt_offset()); |
| 1980 sym->set_plt_offset(0*this->count_); |
| 1981 |
| 1982 this->symbols_.insert(sym); |
| 1983 |
| 1984 sym->set_needs_dynsym_entry(); |
| 1985 ++this->count_; |
| 1986 } |
| 1987 |
| 1988 // Fix values of used symbols in symbol table. |
| 1989 template<int size, bool big_endian> |
| 1990 void |
| 1991 Mips_output_data_mips_stubs<size, big_endian>::fix_symbol_values() |
| 1992 { |
| 1993 int i = 0; |
| 1994 for (std::set<Symbol *>::const_iterator p = this->symbols_.begin(); |
| 1995 p != this->symbols_.end(); ++p, i++) |
| 1996 { |
| 1997 Sized_symbol<size> *sym = static_cast<Sized_symbol<size>*> (*p); |
| 1998 elfcpp::Elf_Xword value = this->address() + i |
| 1999 * (this->big_dyn_symtab_ ? 20 : 16); |
| 2000 sym->set_value(value); |
| 2001 } |
| 2002 } |
| 2003 |
| 2004 // Write out the .MIPS.stubs. This uses the hand-coded instructions and |
| 2005 // adjusts them as needed. |
| 2006 |
| 2007 template<int size, bool big_endian> |
| 2008 void |
| 2009 Mips_output_data_mips_stubs<size, big_endian>::do_write(Output_file* of) |
| 2010 { |
| 2011 typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; |
| 2012 |
| 2013 // Read processor-specific flags in ELF file header. |
| 2014 const unsigned char* pehdr = of->get_output_view(elfcpp::file_header_offset, |
| 2015 elfcpp::Elf_sizes<size>::ehdr_size); |
| 2016 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 2017 |
| 2018 const off_t offset = this->offset(); |
| 2019 const section_size_type oview_size = |
| 2020 convert_to_section_size_type(this->data_size()) + |
| 2021 (this->big_dyn_symtab_ * (this->symbols_.size() + 1) * 4); |
| 2022 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 2023 |
| 2024 unsigned char* pov = oview; |
| 2025 |
| 2026 for (std::set<Symbol *>::const_iterator p = this->symbols_.begin(); |
| 2027 p != this->symbols_.end(); ++p) |
| 2028 { |
| 2029 // Fill the stub. |
| 2030 uint32_t stub_insn0 = stub_lw(); |
| 2031 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn0); |
| 2032 pov += 4; |
| 2033 uint32_t stub_insn1 = stub_move(); |
| 2034 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn1); |
| 2035 pov += 4; |
| 2036 if(this->big_dyn_symtab_) |
| 2037 { |
| 2038 uint32_t stub_insn2 = stub_lui(((*p)->dynsym_index() >> 16) & 0x7fff); |
| 2039 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn2); |
| 2040 pov += 4; |
| 2041 } |
| 2042 uint32_t stub_insn3 = stub_jalr(); |
| 2043 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn3); |
| 2044 pov += 4; |
| 2045 if(this->big_dyn_symtab_) |
| 2046 { |
| 2047 uint32_t stub_insn4 = stub_ori((*p)->dynsym_index() & 0xffff); |
| 2048 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn4); |
| 2049 } |
| 2050 else if ((*p)->dynsym_index() & ~0x7fff) |
| 2051 { |
| 2052 uint32_t stub_insn5 = stub_li16u((*p)->dynsym_index() & 0xffff); |
| 2053 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn5); |
| 2054 } |
| 2055 else |
| 2056 { |
| 2057 uint32_t stub_insn6 = stub_li16s((*p)->dynsym_index()); |
| 2058 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn6); |
| 2059 } |
| 2060 pov += 4; |
| 2061 } |
| 2062 |
| 2063 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2064 pov += 4; |
| 2065 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2066 pov += 4; |
| 2067 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2068 pov += 4; |
| 2069 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2070 pov += 4; |
| 2071 |
| 2072 if(this->big_dyn_symtab_) |
| 2073 { |
| 2074 elfcpp::Swap<32, big_endian>::writeval(pov, 0UL); |
| 2075 pov += 4; |
| 2076 } |
| 2077 |
| 2078 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
| 2079 |
| 2080 of->write_output_view(offset, oview_size, oview); |
| 2081 } |
| 2082 |
| 2083 // Create the PLT section. The ordinary .got section is an argument, |
| 2084 // since we need to refer to the start. |
| 2085 |
| 2086 template<int size, bool big_endian> |
| 2087 Mips_output_data_plt<size, big_endian>::Mips_output_data_plt(Layout* layout, |
| 2088 Output_data_space* got_plt) |
| 2089 : Output_section_data(size == 32 ? 4 : 8), got_plt_(got_plt), count_(0) |
| 2090 { |
| 2091 this->rel_ = new Reloc_section(false); |
| 2092 layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL, |
| 2093 elfcpp::SHF_ALLOC, this->rel_, |
| 2094 ORDER_DYNAMIC_PLT_RELOCS, false); |
| 2095 } |
| 2096 |
| 2097 template<int size, bool big_endian> |
| 2098 void |
| 2099 Mips_output_data_plt<size, big_endian>::do_adjust_output_section( |
| 2100 Output_section* os) |
| 2101 { os->set_entsize(0); } |
| 2102 |
| 2103 // Add an entry to the PLT. |
| 2104 |
| 2105 template<int size, bool big_endian> |
| 2106 void |
| 2107 Mips_output_data_plt<size, big_endian>::add_entry(Symbol* gsym) |
| 2108 { |
| 2109 gold_assert(!gsym->has_plt_offset()); |
| 2110 section_offset_type plt_offset = (this->count_) * sizeof(plt_entry) |
| 2111 + sizeof(first_plt_entry[0]); |
| 2112 gsym->set_plt_offset(plt_offset); |
| 2113 |
| 2114 ++this->count_; |
| 2115 |
| 2116 section_offset_type got_offset = this->got_plt_->current_data_size(); |
| 2117 |
| 2118 // Every PLT entry needs a GOT entry which points back to the PLT |
| 2119 // entry (this will be changed by the dynamic linker, normally |
| 2120 // lazily when the function is called). |
| 2121 this->got_plt_->set_current_data_size(got_offset + 4); |
| 2122 |
| 2123 gsym->set_needs_dynsym_entry(); |
| 2124 this->rel_->add_global(gsym, elfcpp::R_MIPS_JUMP_SLOT, this->got_plt_, |
| 2125 got_offset); |
| 2126 } |
| 2127 |
| 2128 // Mips PLTs. |
| 2129 |
| 2130 // The first entry in the PLT. |
| 2131 |
| 2132 template<int size, bool big_endian> |
| 2133 const uint32_t Mips_output_data_plt<size, big_endian>::first_plt_entry[3][8] = |
| 2134 { |
| 2135 // The format of the first PLT entry in an O32 executable. |
| 2136 { |
| 2137 0x3c1c0000, // lui $28, %hi(&GOTPLT[0]) |
| 2138 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28) |
| 2139 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0]) |
| 2140 0x031cc023, // subu $24, $24, $28 |
| 2141 0x03e07821, // move $15, $31 |
| 2142 0x0018c082, // srl $24, $24, 2 |
| 2143 0x0320f809, // jalr $25 |
| 2144 0x2718fffe // subu $24, $24, 2 |
| 2145 }, |
| 2146 |
| 2147 // The format of the first PLT entry in an N32 executable. Different |
| 2148 // because gp ($28) is not available; we use t2 ($14) instead. |
| 2149 { |
| 2150 0x3c0e0000, // lui $14, %hi(&GOTPLT[0]) |
| 2151 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14) |
| 2152 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0]) |
| 2153 0x030ec023, // subu $24, $24, $14 |
| 2154 0x03e07821, // move $15, $31 |
| 2155 0x0018c082, // srl $24, $24, 2 |
| 2156 0x0320f809, // jalr $25 |
| 2157 0x2718fffe // subu $24, $24, 2 |
| 2158 }, |
| 2159 |
| 2160 // The format of the first PLT entry in an N64 executable. Different |
| 2161 // from N32 because of the increased size of GOT entries. |
| 2162 { |
| 2163 0x3c0e0000, // lui $14, %hi(&GOTPLT[0]) |
| 2164 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14) |
| 2165 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0]) |
| 2166 0x030ec023, // subu $24, $24, $14 |
| 2167 0x03e07821, // move $15, $31 |
| 2168 0x0018c0c2, // srl $24, $24, 3 |
| 2169 0x0320f809, // jalr $25 |
| 2170 0x2718fffe // subu $24, $24, 2 |
| 2171 } |
| 2172 }; |
| 2173 |
| 2174 // Subsequent entries in the PLT. |
| 2175 |
| 2176 template<int size, bool big_endian> |
| 2177 const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry[4] = |
| 2178 { |
| 2179 0x3c0f0000, // lui $15, %hi(.got.plt entry) |
| 2180 0x8df90000, // l[wd] $25, %lo(.got.plt entry)($15) |
| 2181 0x03200008, // jr $25 |
| 2182 0x25f80000 // addiu $24, $15, %lo(.got.plt entry) |
| 2183 }; |
| 2184 |
| 2185 // Write out the PLT. This uses the hand-coded instructions above, |
| 2186 // and adjusts them as needed. |
| 2187 |
| 2188 template<int size, bool big_endian> |
| 2189 void |
| 2190 Mips_output_data_plt<size, big_endian>::do_write(Output_file* of) |
| 2191 { |
| 2192 typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; |
| 2193 |
| 2194 // Read processor-specific flags in ELF file header. |
| 2195 const unsigned char* pehdr = of->get_output_view(elfcpp::file_header_offset, |
| 2196 elfcpp::Elf_sizes<size>::ehdr_size); |
| 2197 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 2198 const size_t abi = this->abi(ehdr.get_e_flags()); |
| 2199 |
| 2200 const off_t offset = this->offset(); |
| 2201 const section_size_type oview_size = |
| 2202 convert_to_section_size_type(this->data_size()); |
| 2203 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 2204 |
| 2205 const off_t got_file_offset = this->got_plt_->offset(); |
| 2206 const section_size_type got_size = |
| 2207 convert_to_section_size_type(this->got_plt_->data_size()); |
| 2208 unsigned char* const got_view = of->get_output_view(got_file_offset, |
| 2209 got_size); |
| 2210 unsigned char* pov = oview; |
| 2211 |
| 2212 Mips_address plt_address = this->address(); |
| 2213 Mips_address got_address = this->got_plt_->address(); |
| 2214 |
| 2215 uint32_t plt_insn0 = first_plt_entry[abi][0] | (((got_address + 0x8000) >> 16)
& 0xffff); |
| 2216 elfcpp::Swap<32, big_endian>::writeval(pov, plt_insn0); |
| 2217 uint32_t plt_insn1 = first_plt_entry[abi][1] | (got_address & 0xffff); |
| 2218 elfcpp::Swap<32, big_endian>::writeval(pov + 4, plt_insn1); |
| 2219 uint32_t plt_insn2 = first_plt_entry[abi][2] | (got_address & 0xffff); |
| 2220 elfcpp::Swap<32, big_endian>::writeval(pov + 8, plt_insn2); |
| 2221 |
| 2222 for(size_t i = 3; i < 8; i++) |
| 2223 elfcpp::Swap<32, big_endian>::writeval(pov + i * 4, |
| 2224 first_plt_entry[abi][i]); |
| 2225 |
| 2226 pov += sizeof(first_plt_entry[abi]); |
| 2227 |
| 2228 unsigned char* got_pov = got_view; |
| 2229 |
| 2230 memset(got_pov, 0, 8); |
| 2231 got_pov += 8; |
| 2232 |
| 2233 const int rel_size = elfcpp::Elf_sizes<32>::rel_size; |
| 2234 unsigned int plt_offset = sizeof(first_plt_entry[abi]); |
| 2235 unsigned int plt_rel_offset = 0; |
| 2236 unsigned int got_offset = 8; |
| 2237 const unsigned int count = this->count_; |
| 2238 for (unsigned int i = 0; |
| 2239 i < count; |
| 2240 ++i, |
| 2241 pov += sizeof(plt_entry), |
| 2242 got_pov += 4, |
| 2243 plt_offset += sizeof(plt_entry), |
| 2244 plt_rel_offset += rel_size, |
| 2245 got_offset += 4) |
| 2246 { |
| 2247 // Set and adjust the PLT entry itself. |
| 2248 int32_t offset = (got_address + got_offset); |
| 2249 |
| 2250 uint32_t plt_insn0 = plt_entry[0] | (((offset + 0x8000) >> 16) & 0xffff); |
| 2251 elfcpp::Swap<32, big_endian>::writeval(pov, plt_insn0); |
| 2252 uint32_t plt_insn1 = plt_entry[1] | (offset & 0xffff); |
| 2253 elfcpp::Swap<32, big_endian>::writeval(pov + 4, plt_insn1); |
| 2254 uint32_t plt_insn2 = plt_entry[2]; |
| 2255 elfcpp::Swap<32, big_endian>::writeval(pov + 8, plt_insn2); |
| 2256 uint32_t plt_insn3 = plt_entry[3] | (offset & 0xffff); |
| 2257 elfcpp::Swap<32, big_endian>::writeval(pov + 12, plt_insn3); |
| 2258 |
| 2259 // Set the entry in the GOT. |
| 2260 elfcpp::Swap<32, big_endian>::writeval(got_pov, plt_address); |
| 2261 } |
| 2262 |
| 2263 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
| 2264 gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size); |
| 2265 |
| 2266 of->write_output_view(offset, oview_size, oview); |
| 2267 of->write_output_view(got_file_offset, got_size, got_view); |
| 2268 } |
| 2269 |
| 2270 // Create a GOT entry for the TLS module index. |
| 2271 |
| 2272 template<int size, bool big_endian> |
| 2273 unsigned int |
| 2274 Target_mips<size, big_endian>::got_mod_index_entry( |
| 2275 Symbol_table* symtab, |
| 2276 Layout* layout, |
| 2277 Sized_relobj_file<size, big_endian>* object) |
| 2278 { |
| 2279 if (this->got_mod_index_offset_ == -1U) |
| 2280 { |
| 2281 gold_assert(symtab != NULL && layout != NULL && object != NULL); |
| 2282 Mips_output_data_got<size, big_endian>* got = |
| 2283 this->got_section(symtab, layout); |
| 2284 unsigned int got_offset; |
| 2285 if (!parameters->doing_static_link()) |
| 2286 { |
| 2287 got_offset = got->add_constant(0); |
| 2288 |
| 2289 Reloc_section* rel_dyn = this->rel_dyn_section(layout); |
| 2290 rel_dyn->add_local(object, 0, |
| 2291 size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 : |
| 2292 elfcpp::R_MIPS_TLS_DTPMOD64, got, |
| 2293 got_offset); |
| 2294 } |
| 2295 else |
| 2296 { |
| 2297 // We are doing a static link. Just mark it as belong to module 1, |
| 2298 // the executable. |
| 2299 got_offset = got->add_constant(1); |
| 2300 } |
| 2301 |
| 2302 got->add_constant(0); |
| 2303 this->got_mod_index_offset_ = got_offset; |
| 2304 } |
| 2305 |
| 2306 return this->got_mod_index_offset_; |
| 2307 } |
| 2308 |
| 2309 // Create a PLT entry for a global symbol. |
| 2310 |
| 2311 template<int size, bool big_endian> |
| 2312 void |
| 2313 Target_mips<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
| 2314 Layout* layout, |
| 2315 Symbol* gsym) |
| 2316 { |
| 2317 if (gsym->has_plt_offset()) |
| 2318 return; |
| 2319 |
| 2320 if (this->plt_ == NULL) |
| 2321 { |
| 2322 // Create the GOT section first. |
| 2323 this->got_section(symtab, layout); |
| 2324 |
| 2325 // Create .rel.dyn section. |
| 2326 this->rel_dyn_section(layout); |
| 2327 |
| 2328 layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, |
| 2329 (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), |
| 2330 this->got_plt_, ORDER_DATA, false); |
| 2331 |
| 2332 // The first two entries are reserved. |
| 2333 this->got_plt_->set_current_data_size(2 * 4); |
| 2334 |
| 2335 this->plt_ = new Mips_output_data_plt<size, big_endian>(layout, |
| 2336 this->got_plt_); |
| 2337 layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, |
| 2338 (elfcpp::SHF_ALLOC |
| 2339 | elfcpp::SHF_EXECINSTR), |
| 2340 this->plt_, ORDER_PLT, false); |
| 2341 |
| 2342 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. |
| 2343 symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, |
| 2344 Symbol_table::PREDEFINED, |
| 2345 this->plt_, |
| 2346 0, 0, elfcpp::STT_FUNC, |
| 2347 elfcpp::STB_LOCAL, |
| 2348 elfcpp::STV_DEFAULT, 0, |
| 2349 false, false); |
| 2350 } |
| 2351 |
| 2352 this->plt_->add_entry(gsym); |
| 2353 } |
| 2354 |
| 2355 |
| 2356 // Create a .MIPS.stubs entry for a global symbol. |
| 2357 |
| 2358 template<int size, bool big_endian> |
| 2359 void |
| 2360 Target_mips<size, big_endian>::make_mips_stubs_entry(Symbol_table* symtab, |
| 2361 Layout* layout, |
| 2362 Symbol* gsym) |
| 2363 { |
| 2364 if (gsym->has_plt_offset()) |
| 2365 return; |
| 2366 |
| 2367 if (this->mips_stubs_ == NULL) |
| 2368 { |
| 2369 // Create the .MIPS.stubs section first. |
| 2370 |
| 2371 this->mips_stubs_ = new Mips_output_data_mips_stubs<size, big_endian> |
| 2372 (layout, this->got_section(symtab, layout), this->gp_); |
| 2373 |
| 2374 layout->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS, |
| 2375 (elfcpp::SHF_ALLOC |
| 2376 | elfcpp::SHF_EXECINSTR), |
| 2377 this->mips_stubs_, ORDER_PLT, false); |
| 2378 } |
| 2379 this->mips_stubs_->add_entry(gsym); |
| 2380 } |
| 2381 |
| 2382 template<int size, bool big_endian> |
| 2383 Mips_output_data_stub<size, big_endian>::Mips_output_data_stub() |
| 2384 : Output_section_data(size == 32 ? 4 : 8), count_(0) |
| 2385 {} |
| 2386 |
| 2387 template<int size, bool big_endian> |
| 2388 void |
| 2389 Mips_output_data_stub<size, big_endian>::do_adjust_output_section( |
| 2390 Output_section* os) |
| 2391 { |
| 2392 os->set_entsize(0); |
| 2393 } |
| 2394 |
| 2395 // Add an entry to the STUB. |
| 2396 |
| 2397 template<int size, bool big_endian> |
| 2398 void |
| 2399 Mips_output_data_stub<size, big_endian>::add_entry(Symbol_table* symtab, |
| 2400 Target_mips<size, big_endian>
* target, |
| 2401 Symbol* gsym) |
| 2402 { |
| 2403 Symbol* sym; |
| 2404 char* buffer = new char[strlen(gsym->name()) + 6]; |
| 2405 gold_assert(buffer != NULL); |
| 2406 |
| 2407 section_offset_type stub_offset = this->count_ * 4 * 4; |
| 2408 |
| 2409 ++this->count_; |
| 2410 |
| 2411 sprintf(buffer, ".pic.%s", gsym->name()); |
| 2412 |
| 2413 sym = symtab->define_in_output_data(buffer, NULL, |
| 2414 Symbol_table::PREDEFINED, |
| 2415 target->stub(), |
| 2416 stub_offset, 0x10, elfcpp::STT_FUNC, |
| 2417 elfcpp::STB_GLOBAL, |
| 2418 elfcpp::STV_DEFAULT, 0, |
| 2419 false, false); |
| 2420 |
| 2421 target->add_stub_symbol(gsym->name(), sym); |
| 2422 this->add_symbol(gsym); |
| 2423 |
| 2424 delete [] buffer; |
| 2425 } |
| 2426 |
| 2427 |
| 2428 // Create a STUB entry for a global symbol. |
| 2429 |
| 2430 template<int size, bool big_endian> |
| 2431 void |
| 2432 Target_mips<size, big_endian>::make_stub_entry(Layout* layout) |
| 2433 { |
| 2434 if (this->stub_ == NULL) |
| 2435 { |
| 2436 this->stub_ = new Mips_output_data_stub<size, big_endian>(); |
| 2437 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
| 2438 (elfcpp::SHF_ALLOC |
| 2439 | elfcpp::SHF_EXECINSTR |
| 2440 | elfcpp::SHF_WRITE), |
| 2441 this->stub_, ORDER_TEXT, false); |
| 2442 } |
| 2443 } |
| 2444 |
| 2445 template<int size, bool big_endian> |
| 2446 const uint32_t Mips_output_data_stub<size, big_endian>::stub_entry[4] = |
| 2447 { |
| 2448 0x3c190000, // lui $25, %hi(func) |
| 2449 0x08000000, // j func |
| 2450 0x27390000, // add $25, $25, %lo(func) |
| 2451 0x00000000 // nop |
| 2452 }; |
| 2453 |
| 2454 // Write out the STUB. This uses the hand-coded instructions above, |
| 2455 // and adjusts them as needed. |
| 2456 |
| 2457 template<int size, bool big_endian> |
| 2458 void |
| 2459 Mips_output_data_stub<size, big_endian>::do_write(Output_file* of) |
| 2460 { |
| 2461 typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; |
| 2462 |
| 2463 const off_t offset = this->offset(); |
| 2464 const section_size_type oview_size = |
| 2465 convert_to_section_size_type(this->data_size()); |
| 2466 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 2467 |
| 2468 unsigned char* pov = oview; |
| 2469 |
| 2470 const unsigned int count = this->count_; |
| 2471 for (unsigned int i = 0; |
| 2472 i < count; |
| 2473 ++i, |
| 2474 pov += 4*4) |
| 2475 { |
| 2476 Sized_symbol<size> *sym = static_cast<Sized_symbol<size>*> |
| 2477 (this->symbol(i)); |
| 2478 |
| 2479 unsigned int value = (unsigned int)sym->value(); |
| 2480 gold_assert(offset >= 0 && offset < 0x0fffffff); |
| 2481 uint32_t stub_insn0 = stub_entry[0] | (((value + 0x8000) >> 16) & 0xffff); |
| 2482 elfcpp::Swap<32, big_endian>::writeval(pov, stub_insn0); |
| 2483 uint32_t stub_insn1 = stub_entry[1] | (((value >> 2) & 0x03ffffff)); |
| 2484 elfcpp::Swap<32, big_endian>::writeval(pov + 4, stub_insn1); |
| 2485 uint32_t stub_insn2 = stub_entry[2] | ((value & 0x0000ffff)); |
| 2486 elfcpp::Swap<32, big_endian>::writeval(pov + 8, stub_insn2); |
| 2487 uint32_t stub_insn3 = stub_entry[3]; |
| 2488 elfcpp::Swap<32, big_endian>::writeval(pov + 12, stub_insn3); |
| 2489 } |
| 2490 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
| 2491 |
| 2492 of->write_output_view(offset, oview_size, oview); |
| 2493 } |
| 2494 |
| 2495 // Process the relocations to determine unreferenced sections for |
| 2496 // garbage collection. |
| 2497 |
| 2498 template<int size, bool big_endian> |
| 2499 void |
| 2500 Target_mips<size, big_endian>::gc_process_relocs( |
| 2501 Symbol_table* symtab, |
| 2502 Layout* layout, |
| 2503 Sized_relobj_file<size, big_endian>* object, |
| 2504 unsigned int data_shndx, |
| 2505 unsigned int, |
| 2506 const unsigned char* prelocs, |
| 2507 size_t reloc_count, |
| 2508 Output_section* output_section, |
| 2509 bool needs_special_offset_handling, |
| 2510 size_t local_symbol_count, |
| 2511 const unsigned char* plocal_symbols) |
| 2512 { |
| 2513 typedef Target_mips<size, big_endian> Mips; |
| 2514 typedef typename Target_mips<size, big_endian>::Scan Scan; |
| 2515 |
| 2516 gold::gc_process_relocs<size, big_endian, Mips, elfcpp::SHT_REL, Scan, |
| 2517 typename Target_mips::Relocatable_size_for_reloc>( |
| 2518 symtab, |
| 2519 layout, |
| 2520 this, |
| 2521 object, |
| 2522 data_shndx, |
| 2523 prelocs, |
| 2524 reloc_count, |
| 2525 output_section, |
| 2526 needs_special_offset_handling, |
| 2527 local_symbol_count, |
| 2528 plocal_symbols); |
| 2529 } |
| 2530 |
| 2531 // Scan the relocations to look for symbol adjustments. |
| 2532 |
| 2533 template<int size, bool big_endian> |
| 2534 void |
| 2535 Target_mips<size, big_endian>::scan_relocs( |
| 2536 Symbol_table* symtab, |
| 2537 Layout* layout, |
| 2538 Sized_relobj_file<size, big_endian>* object, |
| 2539 unsigned int data_shndx, |
| 2540 unsigned int sh_type, |
| 2541 const unsigned char* prelocs, |
| 2542 size_t reloc_count, |
| 2543 Output_section* output_section, |
| 2544 bool needs_special_offset_handling, |
| 2545 size_t local_symbol_count, |
| 2546 const unsigned char* plocal_symbols) |
| 2547 { |
| 2548 typedef Target_mips<size, big_endian> Mips; |
| 2549 typedef typename Target_mips<size, big_endian>::Scan Scan; |
| 2550 |
| 2551 if (sh_type == elfcpp::SHT_RELA) |
| 2552 { |
| 2553 gold_error(_("%s: unsupported RELA reloc section"), |
| 2554 object->name().c_str()); |
| 2555 return; |
| 2556 } |
| 2557 |
| 2558 gold::scan_relocs<size, big_endian, Mips, elfcpp::SHT_REL, Scan>( |
| 2559 symtab, |
| 2560 layout, |
| 2561 this, |
| 2562 object, |
| 2563 data_shndx, |
| 2564 prelocs, |
| 2565 reloc_count, |
| 2566 output_section, |
| 2567 needs_special_offset_handling, |
| 2568 local_symbol_count, |
| 2569 plocal_symbols); |
| 2570 } |
| 2571 |
| 2572 template<int size, bool big_endian> |
| 2573 bool |
| 2574 Target_mips<size, big_endian>::mips_32bit_flags(elfcpp::Elf_Word flags) |
| 2575 { |
| 2576 return ((flags & elfcpp::EF_MIPS_32BITMODE) != 0 |
| 2577 || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_O32 |
| 2578 || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_EABI32 |
| 2579 || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_1 |
| 2580 || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_2 |
| 2581 || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32 |
| 2582 || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32R2); |
| 2583 } |
| 2584 |
| 2585 template<int size, bool big_endian> |
| 2586 bool |
| 2587 Target_mips<size, big_endian>::mips_mach_extends(elfcpp::Elf_Word base, |
| 2588 elfcpp::Elf_Word extension) |
| 2589 { |
| 2590 unsigned int i; |
| 2591 |
| 2592 if(base == extension) |
| 2593 return true; |
| 2594 |
| 2595 if ((base == elfcpp::E_MIPS_ARCH_32) |
| 2596 && mips_mach_extends(elfcpp::E_MIPS_ARCH_64, extension)) |
| 2597 return true; |
| 2598 |
| 2599 if ((base == elfcpp::E_MIPS_ARCH_32R2) |
| 2600 && mips_mach_extends(elfcpp::E_MIPS_ARCH_64R2, extension)) |
| 2601 return true; |
| 2602 |
| 2603 for (i = 0; i < this->extensions_.size(); i++) |
| 2604 if (extension == this->extensions_[i].second) |
| 2605 { |
| 2606 extension = this->extensions_[i].first; |
| 2607 if (extension == base) |
| 2608 return true; |
| 2609 } |
| 2610 |
| 2611 return false; |
| 2612 } |
| 2613 |
| 2614 template<int size, bool big_endian> |
| 2615 void |
| 2616 Target_mips<size, big_endian>::merge_processor_specific_flags(const char* name, |
| 2617 elfcpp::Elf_Word in_flags) |
| 2618 { |
| 2619 elfcpp::Elf_Word out_flags = this->processor_specific_flags(); |
| 2620 |
| 2621 // If flags are not set yet, just copy them. |
| 2622 if(out_flags == 0) |
| 2623 this->set_processor_specific_flags(in_flags); |
| 2624 else |
| 2625 { |
| 2626 elfcpp::Elf_Word new_flags = out_flags; |
| 2627 new_flags |= in_flags & elfcpp::EF_MIPS_NOREORDER; |
| 2628 |
| 2629 // Check flag compatibility. |
| 2630 in_flags &= ~elfcpp::EF_MIPS_NOREORDER; |
| 2631 out_flags &= ~elfcpp::EF_MIPS_NOREORDER; |
| 2632 |
| 2633 // Some IRIX 6 BSD-compatibility objects have this bit set. It |
| 2634 // doesn't seem to matter. |
| 2635 in_flags &= ~elfcpp::EF_MIPS_XGOT; |
| 2636 out_flags &= ~elfcpp::EF_MIPS_XGOT; |
| 2637 |
| 2638 // MIPSpro generates ucode info in n64 objects. Again, we should |
| 2639 // just be able to ignore this. |
| 2640 in_flags &= ~elfcpp::EF_MIPS_UCODE; |
| 2641 out_flags &= ~elfcpp::EF_MIPS_UCODE; |
| 2642 |
| 2643 if((in_flags & elfcpp::EF_MIPS_DYNAMIC) != 0) |
| 2644 in_flags |= elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC; |
| 2645 |
| 2646 // Input flags are same as output, do nothing. |
| 2647 if(in_flags == out_flags) |
| 2648 return; |
| 2649 |
| 2650 // TODO AS: If input file has no sections, its flags are not important. |
| 2651 |
| 2652 if (((in_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0) |
| 2653 != ((out_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0)) |
| 2654 gold_warning(_("Linking abicalls files with non-abicalls files.")); |
| 2655 |
| 2656 if (in_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) |
| 2657 new_flags |= elfcpp::EF_MIPS_CPIC; |
| 2658 if (!(in_flags & elfcpp::EF_MIPS_PIC)) |
| 2659 new_flags &= ~elfcpp::EF_MIPS_PIC; |
| 2660 |
| 2661 in_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC); |
| 2662 out_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC); |
| 2663 |
| 2664 // Compare the ISAs. |
| 2665 if (mips_32bit_flags(out_flags) != mips_32bit_flags(in_flags)) |
| 2666 { |
| 2667 gold_error(_("Source object %s is %d-bit, but output is %d-bit"), |
| 2668 name, mips_32bit_flags(in_flags) ? 32 : 64, |
| 2669 mips_32bit_flags(out_flags) ? 32 : 64); |
| 2670 } |
| 2671 else if(!mips_mach_extends(in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIP
S_MACH), |
| 2672 out_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH))) |
| 2673 { |
| 2674 // Input ISA is not set. Just skip it. |
| 2675 if((in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH)) == 0); |
| 2676 // ISA is not set yet, do it now. |
| 2677 else if((out_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH)) == 0
) |
| 2678 new_flags |= in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH |
elfcpp::EF_MIPS_32BITMODE); |
| 2679 // OBFD's ISA isn't the same as, or an extension of, IBFD's. |
| 2680 else if(mips_mach_extends(out_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF
_MIPS_MACH), |
| 2681 in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH))) |
| 2682 { |
| 2683 // Copy the architecture info from IBFD to OBFD. Also copy |
| 2684 // the 32-bit flag (if set) so that we continue to recognise |
| 2685 // OBFD as a 32-bit binary. |
| 2686 new_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH); |
| 2687 new_flags |= |
| 2688 in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | elfcpp
::EF_MIPS_32BITMODE); |
| 2689 |
| 2690 // Copy across the ABI flags if OBFD doesn't use them |
| 2691 // and if that was what caused us to treat IBFD as 32-bit. |
| 2692 if((out_flags & elfcpp::EF_MIPS_ABI) == 0 |
| 2693 && mips_32bit_flags(in_flags) |
| 2694 && !mips_32bit_flags(in_flags & ~elfcpp::EF_MIPS_ABI)) |
| 2695 new_flags |= in_flags & elfcpp::EF_MIPS_ABI; |
| 2696 } |
| 2697 else |
| 2698 { |
| 2699 // The ISAs aren't compatible. |
| 2700 gold_error(_("%s ISA is 0x%x and it is not compatible with current" |
| 2701 " ISA 0x%x"), |
| 2702 name, in_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIP
S_MACH), |
| 2703 out_flags & (elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MAC
H)); |
| 2704 } |
| 2705 } |
| 2706 |
| 2707 in_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | elfcpp::EF_MIPS_
32BITMODE); |
| 2708 out_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | elfcpp::EF_MIPS
_32BITMODE); |
| 2709 |
| 2710 // Compare ABIs. TODO AS: The 64-bit ABI does not use EF_MIPS_ABI. |
| 2711 // But, it does set EI_CLASS differently from any 32-bit ABI. |
| 2712 if ((in_flags & elfcpp::EF_MIPS_ABI) != (out_flags & elfcpp::EF_MIPS_ABI)) |
| 2713 { |
| 2714 // Only error if both are set (to different values). |
| 2715 if ((in_flags & elfcpp::EF_MIPS_ABI) && (out_flags & elfcpp::EF_MIPS_ABI
)) |
| 2716 { |
| 2717 gold_error(_("%s ABI %d is different then current ABI %d"), |
| 2718 name, in_flags & elfcpp::EF_MIPS_ABI, |
| 2719 out_flags & elfcpp::EF_MIPS_ABI); |
| 2720 } |
| 2721 |
| 2722 in_flags &= ~elfcpp::EF_MIPS_ABI; |
| 2723 out_flags &= ~elfcpp::EF_MIPS_ABI; |
| 2724 } |
| 2725 |
| 2726 // Compare ABIs. |
| 2727 if ((in_flags & elfcpp::EF_MIPS_ABI2) != (out_flags & elfcpp::EF_MIPS_ABI2)) |
| 2728 { |
| 2729 gold_error(_("%s is ABI%s while output is ABI%s"), |
| 2730 name, ((in_flags & elfcpp::EF_MIPS_ABI2) ? "2" : ""), |
| 2731 ((out_flags & elfcpp::EF_MIPS_ABI2) ? "2" : "")); |
| 2732 |
| 2733 in_flags &= ~elfcpp::EF_MIPS_ABI2; |
| 2734 out_flags &= ~elfcpp::EF_MIPS_ABI2; |
| 2735 } |
| 2736 |
| 2737 // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together |
| 2738 // and allow arbitrary mixing of the remaining ASEs (retain the union). |
| 2739 if ((in_flags & elfcpp::EF_MIPS_ARCH_ASE) != (out_flags & elfcpp::EF_MIPS_AR
CH_ASE)) |
| 2740 { |
| 2741 int old_micro = out_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS; |
| 2742 int new_micro = in_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS; |
| 2743 int old_m16 = out_flags & elfcpp::EF_MIPS_ARCH_ASE_M16; |
| 2744 int new_m16 = in_flags & elfcpp::EF_MIPS_ARCH_ASE_M16; |
| 2745 int micro_mis = old_m16 && new_micro; |
| 2746 int m16_mis = old_micro && new_m16; |
| 2747 |
| 2748 if (m16_mis || micro_mis) |
| 2749 { |
| 2750 gold_error(_("%s ASE is %s while output ASE is %s"), |
| 2751 name, m16_mis ? "MIPS16" : "microMIPS", |
| 2752 m16_mis ? "microMIPS" : "MIPS16"); |
| 2753 } |
| 2754 |
| 2755 new_flags |= in_flags & elfcpp::EF_MIPS_ARCH_ASE; |
| 2756 |
| 2757 in_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE; |
| 2758 out_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE; |
| 2759 } |
| 2760 |
| 2761 // Warn about any other mismatches |
| 2762 if (in_flags != out_flags) |
| 2763 { |
| 2764 gold_error(_("%s uses different flags 0x%x then output 0x%x"), |
| 2765 name, in_flags, out_flags); |
| 2766 } |
| 2767 |
| 2768 this->set_processor_specific_flags(new_flags); |
| 2769 } |
| 2770 } |
| 2771 |
| 2772 // Finalize the sections. |
| 2773 |
| 2774 template <int size, bool big_endian> |
| 2775 void |
| 2776 Target_mips<size, big_endian>::do_finalize_sections(Layout* layout, |
| 2777 const Input_objects* input_objects, |
| 2778 Symbol_table* symtab) |
| 2779 { |
| 2780 // Add NULL segment. |
| 2781 if(!parameters->options().relocatable()) |
| 2782 layout->make_output_segment(elfcpp::PT_NULL, 0); |
| 2783 |
| 2784 for (Layout::Section_list::const_iterator p = layout->section_list().begin(); |
| 2785 p != layout->section_list().end(); ++p) |
| 2786 if ((*p)->type() == elfcpp::SHT_MIPS_REGINFO) |
| 2787 { |
| 2788 Mips_output_section_reginfo<size>* reginfo = |
| 2789 Mips_output_section_reginfo<size>::as_mips_output_section_reginfo(*p); |
| 2790 |
| 2791 if(this->gp() == NULL) |
| 2792 reginfo->set_gp(0); |
| 2793 else |
| 2794 reginfo->set_gp(this->gp()); |
| 2795 |
| 2796 if(!parameters->options().relocatable()) |
| 2797 { |
| 2798 Output_segment *reginfo_segment = |
| 2799 layout->make_output_segment(elfcpp::PT_MIPS_REGINFO, elfcpp::P
F_R); |
| 2800 reginfo_segment->add_output_section_to_nonload(reginfo, elfcpp::PF
_R); |
| 2801 } |
| 2802 |
| 2803 // There is only one .reginfo section |
| 2804 break; |
| 2805 } |
| 2806 |
| 2807 if(this->got_section()) |
| 2808 { |
| 2809 this->got_section()->add_global_relocs(); |
| 2810 this->got_section()->add_global_tls_relocs(); |
| 2811 } |
| 2812 |
| 2813 // Merge processor-specific flags. |
| 2814 for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); |
| 2815 p != input_objects->relobj_end(); |
| 2816 ++p) |
| 2817 { |
| 2818 Sized_relobj_file<size, big_endian>* relobj = |
| 2819 static_cast<const Sized_relobj_file<size, big_endian>*>(*p); |
| 2820 |
| 2821 Input_file::Format format = relobj->input_file()->format(); |
| 2822 if (format == Input_file::FORMAT_ELF) |
| 2823 { |
| 2824 // Read processor-specific flags in ELF file header. |
| 2825 const unsigned char* pehdr = relobj-> |
| 2826 get_view(elfcpp::file_header_offset, |
| 2827 elfcpp::Elf_sizes<size>::ehdr_size, |
| 2828 true, false); |
| 2829 |
| 2830 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 2831 elfcpp::Elf_Word in_flags = ehdr.get_e_flags(); |
| 2832 |
| 2833 this->merge_processor_specific_flags(relobj->name().c_str(), in_flags)
; |
| 2834 } |
| 2835 } |
| 2836 |
| 2837 for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin(); |
| 2838 p != input_objects->dynobj_end(); |
| 2839 ++p) |
| 2840 { |
| 2841 Sized_dynobj<size, big_endian>* dynobj = |
| 2842 static_cast<const Sized_dynobj<size, big_endian>*>(*p); |
| 2843 |
| 2844 // Read processor-specific flags. |
| 2845 const unsigned char* pehdr = dynobj->get_view(elfcpp::file_header_offset, |
| 2846 elfcpp::Elf_sizes<size>::ehdr_size, |
| 2847 true, false); |
| 2848 |
| 2849 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 2850 elfcpp::Elf_Word in_flags = ehdr.get_e_flags(); |
| 2851 |
| 2852 this->merge_processor_specific_flags(dynobj->name().c_str(), in_flags); |
| 2853 } |
| 2854 |
| 2855 // Fill in some more dynamic tags. |
| 2856 const Reloc_section* rel_plt = (this->plt_ == NULL |
| 2857 ? NULL |
| 2858 : this->plt_->rel_plt()); |
| 2859 layout->add_target_dynamic_tags(true, this->got_, rel_plt, |
| 2860 this->rel_dyn_, true, false); |
| 2861 |
| 2862 Output_data_dynamic* const odyn = layout->dynamic_data(); |
| 2863 if((odyn) && |
| 2864 (!parameters->options().relocatable() && !parameters->doing_static_link())) |
| 2865 { |
| 2866 // In case there is no .got section, create one. |
| 2867 this->got_section(symtab, layout); |
| 2868 |
| 2869 unsigned int d_val; |
| 2870 // This element holds a 32-bit version id for the Runtime |
| 2871 // Linker Interface. This will start at integer value 1. |
| 2872 d_val = 0x01; |
| 2873 odyn->add_constant(elfcpp::DT_MIPS_RLD_VERSION, d_val); |
| 2874 |
| 2875 // Dynamic flags |
| 2876 d_val = elfcpp::RHF_NOTPOT; |
| 2877 odyn->add_constant(elfcpp::DT_MIPS_FLAGS, d_val); |
| 2878 |
| 2879 // This member holds the base address of the segment. |
| 2880 odyn->add_target_specific(elfcpp::DT_MIPS_BASE_ADDRESS); |
| 2881 |
| 2882 // This member holds the number of entries in the .dynsym section. |
| 2883 odyn->add_target_specific(elfcpp::DT_MIPS_SYMTABNO); |
| 2884 |
| 2885 // This member holds the index of the first dynamic symbol |
| 2886 // table entry that corresponds to an entry in the global offset table. |
| 2887 odyn->add_target_specific(elfcpp::DT_MIPS_GOTSYM); |
| 2888 |
| 2889 // This member holds the number of local global offset table entries. |
| 2890 odyn->add_target_specific(elfcpp::DT_MIPS_LOCAL_GOTNO); |
| 2891 |
| 2892 if(this->plt_ != NULL) |
| 2893 // DT_MIPS_PLTGOT dynamic tag |
| 2894 odyn->add_section_address(elfcpp::DT_MIPS_PLTGOT, this->got_plt_); |
| 2895 } |
| 2896 |
| 2897 // Set the .text section. |
| 2898 this->text_section_ = layout->find_output_section(".text"); |
| 2899 // Set the symbol table |
| 2900 this->symtab_ = symtab; |
| 2901 // Set the layout |
| 2902 this->layout_ = layout; |
| 2903 |
| 2904 // Emit any relocs we saved in an attempt to avoid generating COPY |
| 2905 // relocs. |
| 2906 if (this->copy_relocs_.any_saved_relocs()) |
| 2907 this->copy_relocs_.emit(this->rel_dyn_section(layout)); |
| 2908 |
| 2909 Target::do_finalize_sections (layout, input_objects, symtab); |
| 2910 } |
| 2911 |
| 2912 // Functor class for processing the global symbol table. Processes the |
| 2913 // index in dynamic section if the symbol has GOT entry, and finds |
| 2914 // minimum index value. |
| 2915 |
| 2916 template<int size, bool big_endian> |
| 2917 class Symbol_visitor_gotsym |
| 2918 { |
| 2919 public: |
| 2920 Symbol_visitor_gotsym() |
| 2921 { } |
| 2922 |
| 2923 void |
| 2924 operator()(const Sized_symbol<size>* sym) |
| 2925 { |
| 2926 if (sym->has_got_offset(0) && sym->needs_dynsym_entry() && sym->dynsym_index
() < this->min_index_) |
| 2927 this->min_index_ = sym->dynsym_index(); |
| 2928 } |
| 2929 |
| 2930 unsigned int min_dynsym_index() |
| 2931 { |
| 2932 return this->min_index_; |
| 2933 } |
| 2934 private: |
| 2935 static unsigned int min_index_; |
| 2936 }; |
| 2937 |
| 2938 template<int size, bool big_endian> |
| 2939 unsigned int Symbol_visitor_gotsym<size, big_endian>::min_index_ = -1U; |
| 2940 |
| 2941 template<int size, bool big_endian> |
| 2942 void |
| 2943 Target_mips<size, big_endian>::do_fix_sections(Layout*, Symbol_table* ) |
| 2944 { |
| 2945 Output_section *dynsym = this->layout_->find_output_section(".dynsym"); |
| 2946 |
| 2947 if((dynsym != NULL) && (this->mips_stubs_ != NULL)) |
| 2948 { |
| 2949 this->mips_stubs_->set_big_dyn_symtab(((unsigned int)dynsym->data_size()/1
6) > 0x10000); |
| 2950 |
| 2951 this->mips_stubs_->fix_symbol_values(); |
| 2952 } |
| 2953 } |
| 2954 |
| 2955 // MIPS specific dynamic tags. |
| 2956 template<int size, bool big_endian> |
| 2957 unsigned int |
| 2958 Target_mips<size, big_endian>::do_dynamic_tag_value(elfcpp::DT tag) const |
| 2959 { |
| 2960 Symbol_table *symtab = this->symtab_; |
| 2961 Layout *layout = this->layout_; |
| 2962 |
| 2963 Output_section *dynsym = layout->find_output_section(".dynsym"); |
| 2964 gold_assert(dynsym != NULL); |
| 2965 |
| 2966 switch(tag) |
| 2967 { |
| 2968 case elfcpp::DT_MIPS_BASE_ADDRESS: |
| 2969 { |
| 2970 typedef std::vector<Output_segment*> Segment_list; |
| 2971 const Segment_list segment_list_ = layout->segment_list(); |
| 2972 unsigned int vaddr = -1U; |
| 2973 for(Segment_list::const_iterator p = segment_list_.begin(); |
| 2974 p != segment_list_.end(); |
| 2975 ++p) |
| 2976 { |
| 2977 if(((*p)->flags() & elfcpp::PF_R) != 0) |
| 2978 { |
| 2979 if((*p)->vaddr() < vaddr) |
| 2980 vaddr = (*p)->vaddr(); |
| 2981 } |
| 2982 } |
| 2983 return vaddr; |
| 2984 } |
| 2985 case elfcpp::DT_MIPS_SYMTABNO: |
| 2986 return (unsigned int)dynsym->data_size()/16; |
| 2987 case elfcpp::DT_MIPS_GOTSYM: |
| 2988 { |
| 2989 unsigned int min_index = symtab->global_got_index(); |
| 2990 |
| 2991 if(min_index == -1U) |
| 2992 min_index = (unsigned int)dynsym->data_size()/16; |
| 2993 |
| 2994 return min_index; |
| 2995 } |
| 2996 case elfcpp::DT_MIPS_LOCAL_GOTNO: |
| 2997 |
| 2998 return(unsigned int)this->got_->data_size()/4 - |
| 2999 ((unsigned int)dynsym->data_size()/16 - symtab->global_got_index()) - |
| 3000 this->got_->tls_entries(); |
| 3001 default: |
| 3002 gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag); |
| 3003 } |
| 3004 |
| 3005 return (unsigned int)-1; |
| 3006 } |
| 3007 |
| 3008 // Relocate a section. |
| 3009 |
| 3010 template<int size, bool big_endian> |
| 3011 void |
| 3012 Target_mips<size, big_endian>::relocate_section( |
| 3013 const Relocate_info<size, big_endian>* relinfo, |
| 3014 unsigned int sh_type, |
| 3015 const unsigned char* prelocs, |
| 3016 size_t reloc_count, |
| 3017 Output_section* output_section, |
| 3018 bool needs_special_offset_handling, |
| 3019 unsigned char* view, |
| 3020 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 3021 section_size_type view_size, |
| 3022 const Reloc_symbol_changes* reloc_symbol_changes) |
| 3023 { |
| 3024 typedef Target_mips<size, big_endian> Mips; |
| 3025 typedef typename Target_mips<size, big_endian>::Relocate Mips_relocate; |
| 3026 |
| 3027 gold_assert(sh_type == elfcpp::SHT_REL); |
| 3028 |
| 3029 gold::relocate_section<size, big_endian, Mips, elfcpp::SHT_REL, |
| 3030 Mips_relocate>( |
| 3031 relinfo, |
| 3032 this, |
| 3033 prelocs, |
| 3034 reloc_count, |
| 3035 output_section, |
| 3036 needs_special_offset_handling, |
| 3037 view, |
| 3038 address, |
| 3039 view_size, |
| 3040 reloc_symbol_changes); |
| 3041 } |
| 3042 |
| 3043 // Return the size of a relocation while scanning during a relocatable |
| 3044 // link. |
| 3045 |
| 3046 template<int size, bool big_endian> |
| 3047 unsigned int |
| 3048 Target_mips<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( |
| 3049 unsigned int r_type, |
| 3050 Relobj* object) |
| 3051 { |
| 3052 switch (r_type) |
| 3053 { |
| 3054 case elfcpp::R_MIPS_NONE: |
| 3055 case elfcpp::R_MIPS_UNUSED1: |
| 3056 case elfcpp::R_MIPS_UNUSED2: |
| 3057 case elfcpp::R_MIPS_UNUSED3: |
| 3058 case elfcpp::R_MIPS_INSERT_A: |
| 3059 case elfcpp::R_MIPS_INSERT_B: |
| 3060 case elfcpp::R_MIPS_DELETE: |
| 3061 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 3062 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 3063 case elfcpp::R_MIPS_REL16: |
| 3064 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 3065 case elfcpp::R_MIPS_PJUMP: |
| 3066 case elfcpp::R_MIPS_RELGOT: |
| 3067 case elfcpp::R_MIPS_TLS_TPREL64: |
| 3068 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 3069 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 3070 return 0; |
| 3071 |
| 3072 case elfcpp::R_MIPS_64: |
| 3073 case elfcpp::R_MIPS_SUB: |
| 3074 return 8; |
| 3075 |
| 3076 case elfcpp::R_MIPS_32: |
| 3077 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 3078 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 3079 case elfcpp::R_MIPS_TLS_TPREL32: |
| 3080 case elfcpp::R_MIPS_REL32: |
| 3081 case elfcpp::R_MIPS_PC32: |
| 3082 case elfcpp::R_MIPS_GPREL32: |
| 3083 case elfcpp::R_MIPS_JALR: |
| 3084 case elfcpp::R_MIPS_SCN_DISP: |
| 3085 return 4; |
| 3086 |
| 3087 case elfcpp::R_MIPS_16: |
| 3088 case elfcpp::R_MIPS_HI16: |
| 3089 case elfcpp::R_MIPS_LO16: |
| 3090 case elfcpp::R_MIPS_HIGHER: |
| 3091 case elfcpp::R_MIPS_HIGHEST: |
| 3092 case elfcpp::R_MIPS_GPREL16: |
| 3093 case elfcpp::R_MIPS16_HI16: |
| 3094 case elfcpp::R_MIPS16_LO16: |
| 3095 case elfcpp::R_MIPS_PC16: |
| 3096 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 3097 case elfcpp::R_MIPS_GOT16: |
| 3098 case elfcpp::R_MIPS16_GOT16: |
| 3099 case elfcpp::R_MIPS_CALL16: |
| 3100 case elfcpp::R_MIPS16_CALL16: |
| 3101 case elfcpp::R_MIPS_GOT_HI16: |
| 3102 case elfcpp::R_MIPS_CALL_HI16: |
| 3103 case elfcpp::R_MIPS_GOT_LO16: |
| 3104 case elfcpp::R_MIPS_CALL_LO16: |
| 3105 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 3106 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 3107 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 3108 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 3109 case elfcpp::R_MIPS16_GPREL: |
| 3110 case elfcpp::R_MIPS_GOT_DISP: |
| 3111 case elfcpp::R_MIPS_LITERAL: |
| 3112 case elfcpp::R_MIPS_GOT_PAGE: |
| 3113 case elfcpp::R_MIPS_GOT_OFST: |
| 3114 case elfcpp::R_MIPS_TLS_GD: |
| 3115 case elfcpp::R_MIPS_TLS_LDM: |
| 3116 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 3117 return 2; |
| 3118 |
| 3119 // These relocations are not byte sized |
| 3120 case elfcpp::R_MIPS_26: |
| 3121 case elfcpp::R_MIPS16_26: |
| 3122 return 4; |
| 3123 |
| 3124 // These relocations are not byte sized |
| 3125 case elfcpp::R_MIPS_SHIFT5: |
| 3126 case elfcpp::R_MIPS_SHIFT6: |
| 3127 return 1; |
| 3128 |
| 3129 case elfcpp::R_MIPS_COPY: |
| 3130 case elfcpp::R_MIPS_GLOB_DAT: |
| 3131 case elfcpp::R_MIPS_JUMP_SLOT: |
| 3132 object->error(_("unexpected reloc %u in object file"), r_type); |
| 3133 return 0; |
| 3134 |
| 3135 default: |
| 3136 object->error(_("unsupported reloc %u in object file"), r_type); |
| 3137 return 0; |
| 3138 } |
| 3139 } |
| 3140 |
| 3141 // Scan the relocs during a relocatable link. |
| 3142 |
| 3143 template<int size, bool big_endian> |
| 3144 void |
| 3145 Target_mips<size, big_endian>::scan_relocatable_relocs( |
| 3146 Symbol_table* symtab, |
| 3147 Layout* layout, |
| 3148 Sized_relobj_file<size, big_endian>* object, |
| 3149 unsigned int data_shndx, |
| 3150 unsigned int sh_type, |
| 3151 const unsigned char* prelocs, |
| 3152 size_t reloc_count, |
| 3153 Output_section* output_section, |
| 3154 bool needs_special_offset_handling, |
| 3155 size_t local_symbol_count, |
| 3156 const unsigned char* plocal_symbols, |
| 3157 Relocatable_relocs* rr) |
| 3158 { |
| 3159 gold_assert(sh_type == elfcpp::SHT_REL); |
| 3160 |
| 3161 typedef Mips_scan_relocatable_relocs<big_endian, elfcpp::SHT_REL, |
| 3162 Relocatable_size_for_reloc> Scan_relocatable_relocs; |
| 3163 |
| 3164 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_REL, |
| 3165 Scan_relocatable_relocs>( |
| 3166 symtab, |
| 3167 layout, |
| 3168 object, |
| 3169 data_shndx, |
| 3170 prelocs, |
| 3171 reloc_count, |
| 3172 output_section, |
| 3173 needs_special_offset_handling, |
| 3174 local_symbol_count, |
| 3175 plocal_symbols, |
| 3176 rr); |
| 3177 } |
| 3178 |
| 3179 // Relocate a section during a relocatable link. |
| 3180 |
| 3181 template<int size, bool big_endian> |
| 3182 void |
| 3183 Target_mips<size, big_endian>::relocate_for_relocatable( |
| 3184 const Relocate_info<size, big_endian>* relinfo, |
| 3185 unsigned int sh_type, |
| 3186 const unsigned char* prelocs, |
| 3187 size_t reloc_count, |
| 3188 Output_section* output_section, |
| 3189 off_t offset_in_output_section, |
| 3190 const Relocatable_relocs* rr, |
| 3191 unsigned char* view, |
| 3192 typename elfcpp::Elf_types<size>::Elf_Addr view_address, |
| 3193 section_size_type view_size, |
| 3194 unsigned char* reloc_view, |
| 3195 section_size_type reloc_view_size) |
| 3196 { |
| 3197 gold_assert(sh_type == elfcpp::SHT_REL); |
| 3198 |
| 3199 gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_REL>( |
| 3200 relinfo, |
| 3201 prelocs, |
| 3202 reloc_count, |
| 3203 output_section, |
| 3204 offset_in_output_section, |
| 3205 rr, |
| 3206 view, |
| 3207 view_address, |
| 3208 view_size, |
| 3209 reloc_view, |
| 3210 reloc_view_size); |
| 3211 } |
| 3212 |
| 3213 // Perform target-specific processing in a relocatable link. This is |
| 3214 // only used if we use the relocation strategy RELOC_SPECIAL. |
| 3215 |
| 3216 template<int size, bool big_endian> |
| 3217 void |
| 3218 Target_mips<size, big_endian>::relocate_special_relocatable( |
| 3219 const Relocate_info<size, big_endian>* relinfo, |
| 3220 unsigned int sh_type, |
| 3221 const unsigned char* preloc_in, |
| 3222 size_t relnum, |
| 3223 Output_section* output_section, |
| 3224 off_t offset_in_output_section, |
| 3225 unsigned char* view, |
| 3226 elfcpp::Elf_types<32>::Elf_Addr view_address, |
| 3227 section_size_type, |
| 3228 unsigned char* preloc_out) |
| 3229 { |
| 3230 // We can only handle REL type relocation sections. |
| 3231 gold_assert(sh_type == elfcpp::SHT_REL); |
| 3232 |
| 3233 typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc Reltype
; |
| 3234 typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc_write |
| 3235 Reltype_write; |
| 3236 typedef typename elfcpp::Elf_types<32>::Elf_Addr Mips_address; |
| 3237 typedef Mips_relocate_functions<size, big_endian> Reloc_funcs; |
| 3238 |
| 3239 const Mips_address invalid_address = static_cast<Mips_address>(0) - 1; |
| 3240 |
| 3241 const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
| 3242 const unsigned int local_count = object->local_symbol_count(); |
| 3243 |
| 3244 Reltype reloc(preloc_in); |
| 3245 Reltype_write reloc_write(preloc_out); |
| 3246 |
| 3247 elfcpp::Elf_types<32>::Elf_WXword r_info = reloc.get_r_info(); |
| 3248 const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 3249 const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); |
| 3250 |
| 3251 // Get the new symbol index. |
| 3252 // We only use RELOC_SPECIAL strategy in local relocations. |
| 3253 gold_assert(r_sym < local_count); |
| 3254 |
| 3255 // We are adjusting a section symbol. We need to find |
| 3256 // the symbol table index of the section symbol for |
| 3257 // the output section corresponding to input section |
| 3258 // in which this symbol is defined. |
| 3259 bool is_ordinary; |
| 3260 unsigned int shndx = object->local_symbol_input_shndx(r_sym, &is_ordinary); |
| 3261 gold_assert(is_ordinary); |
| 3262 Output_section* os = object->output_section(shndx); |
| 3263 gold_assert(os != NULL); |
| 3264 gold_assert(os->needs_symtab_index()); |
| 3265 unsigned int new_symndx = os->symtab_index(); |
| 3266 |
| 3267 // Get the new offset--the location in the output section where |
| 3268 // this relocation should be applied. |
| 3269 |
| 3270 Mips_address offset = reloc.get_r_offset(); |
| 3271 Mips_address new_offset; |
| 3272 if (offset_in_output_section != invalid_address) |
| 3273 new_offset = offset + offset_in_output_section; |
| 3274 else |
| 3275 { |
| 3276 section_offset_type sot_offset = |
| 3277 convert_types<section_offset_type, Mips_address>(offset); |
| 3278 section_offset_type new_sot_offset = |
| 3279 output_section->output_offset(object, relinfo->data_shndx, |
| 3280 sot_offset); |
| 3281 gold_assert(new_sot_offset != -1); |
| 3282 new_offset = new_sot_offset; |
| 3283 } |
| 3284 |
| 3285 // In an object file, r_offset is an offset within the section. |
| 3286 // In an executable or dynamic object, generated by |
| 3287 // --emit-relocs, r_offset is an absolute address. |
| 3288 if (!parameters->options().relocatable()) |
| 3289 { |
| 3290 new_offset += view_address; |
| 3291 if (offset_in_output_section != invalid_address) |
| 3292 new_offset -= offset_in_output_section; |
| 3293 } |
| 3294 |
| 3295 reloc_write.put_r_offset(new_offset); |
| 3296 reloc_write.put_r_info(elfcpp::elf_r_info<32>(new_symndx, r_type)); |
| 3297 |
| 3298 // Handle the reloc addend. |
| 3299 // The relocation uses a section symbol in the input file. |
| 3300 // We are adjusting it to use a section symbol in the output |
| 3301 // file. The input section symbol refers to some address in |
| 3302 // the input section. We need the relocation in the output |
| 3303 // file to refer to that same address. This adjustment to |
| 3304 // the addend is the same calculation we use for a simple |
| 3305 // absolute relocation for the input section symbol. |
| 3306 |
| 3307 unsigned char* paddend = view + offset; |
| 3308 typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY; |
| 3309 switch (r_type) |
| 3310 { |
| 3311 case elfcpp::R_MIPS_26: |
| 3312 reloc_status = Reloc_funcs::rel26(paddend, object, object->local_symbol(r_
sym), |
| 3313 offset_in_output_section, false); |
| 3314 |
| 3315 break; |
| 3316 |
| 3317 default: |
| 3318 gold_unreachable(); |
| 3319 } |
| 3320 |
| 3321 // Report any errors. |
| 3322 switch (reloc_status) |
| 3323 { |
| 3324 case Reloc_funcs::STATUS_OKAY: |
| 3325 break; |
| 3326 case Reloc_funcs::STATUS_OVERFLOW: |
| 3327 gold_error_at_location(relinfo, relnum, new_offset, |
| 3328 _("relocation overflow")); |
| 3329 break; |
| 3330 case Reloc_funcs::STATUS_BAD_RELOC: |
| 3331 gold_error_at_location( |
| 3332 relinfo, |
| 3333 relnum, |
| 3334 new_offset , |
| 3335 _("unexpected opcode while processing relocation")); |
| 3336 break; |
| 3337 default: |
| 3338 gold_unreachable(); |
| 3339 } |
| 3340 } |
| 3341 |
| 3342 // Optimize the TLS relocation type based on what we know about the |
| 3343 // symbol. IS_FINAL is true if the final address of this symbol is |
| 3344 // known at link time. |
| 3345 |
| 3346 template<int size, bool big_endian> |
| 3347 tls::Tls_optimization |
| 3348 Target_mips<size, big_endian>::optimize_tls_reloc(bool, int) |
| 3349 { |
| 3350 // FIXME: Currently we do not do any TLS optimization. |
| 3351 return tls::TLSOPT_NONE; |
| 3352 } |
| 3353 |
| 3354 // We are about to emit a dynamic relocation of type R_TYPE. If the |
| 3355 // dynamic linker does not support it, issue an error. |
| 3356 |
| 3357 template<int size, bool big_endian> |
| 3358 void |
| 3359 Target_mips<size, big_endian>::Scan::check_non_pic(Relobj* object, |
| 3360 unsigned int r_type) |
| 3361 { |
| 3362 switch (r_type) |
| 3363 { |
| 3364 // These are the relocation types supported by glibc for MIPS. |
| 3365 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 3366 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 3367 case elfcpp::R_MIPS_TLS_TPREL32: |
| 3368 case elfcpp::R_MIPS_REL32: |
| 3369 case elfcpp::R_MIPS_GLOB_DAT: |
| 3370 case elfcpp::R_MIPS_64: |
| 3371 return; |
| 3372 |
| 3373 default: |
| 3374 { |
| 3375 // This prevents us from issuing more than one error per reloc |
| 3376 // section. But we can still wind up issuing more than one |
| 3377 // error per object file. |
| 3378 if (this->issued_non_pic_error_) |
| 3379 return; |
| 3380 gold_assert(parameters->options().output_is_position_independent()); |
| 3381 object->error(_("requires unsupported dynamic reloc; " |
| 3382 "recompile with -fPIC")); |
| 3383 this->issued_non_pic_error_ = true; |
| 3384 return; |
| 3385 } |
| 3386 |
| 3387 case elfcpp::R_MIPS_NONE: |
| 3388 gold_unreachable(); |
| 3389 } |
| 3390 } |
| 3391 |
| 3392 // Scan a relocation for a local symbol. |
| 3393 |
| 3394 template<int size, bool big_endian> |
| 3395 inline void |
| 3396 Target_mips<size, big_endian>::Scan::local( |
| 3397 Symbol_table* symtab, |
| 3398 Layout* layout, |
| 3399 Target_mips<size, big_endian>* target, |
| 3400 Sized_relobj_file<size, big_endian>* object, |
| 3401 unsigned int data_shndx, |
| 3402 Output_section* output_section, |
| 3403 const elfcpp::Rel<size, big_endian>& reloc, |
| 3404 unsigned int r_type, |
| 3405 const elfcpp::Sym<size, big_endian>& lsym) |
| 3406 { |
| 3407 switch (r_type) |
| 3408 { |
| 3409 // Global offset table relocations |
| 3410 case elfcpp::R_MIPS_CALL16: |
| 3411 case elfcpp::R_MIPS16_CALL16: |
| 3412 case elfcpp::R_MIPS_GOT16: |
| 3413 case elfcpp::R_MIPS16_GOT16: |
| 3414 { |
| 3415 Mips_output_data_got<size, big_endian>* got = |
| 3416 target->got_section(symtab, layout); |
| 3417 |
| 3418 std::stringstream tmp; |
| 3419 tmp << static_cast<unsigned int> (reloc.get_r_info()) |
| 3420 << static_cast<unsigned int> (reinterpret_cast<unsigned long long> (ob
ject)) |
| 3421 << static_cast<unsigned int> (reloc.get_r_offset()); |
| 3422 std::string key = tmp.str(); |
| 3423 |
| 3424 got->add_got16_view(key, got); |
| 3425 } |
| 3426 break; |
| 3427 case elfcpp::R_MIPS_GOT_DISP: |
| 3428 case elfcpp::R_MIPS_GOT_HI16: |
| 3429 case elfcpp::R_MIPS_CALL_HI16: |
| 3430 case elfcpp::R_MIPS_GOT_LO16: |
| 3431 case elfcpp::R_MIPS_CALL_LO16: |
| 3432 { |
| 3433 // The symbol requires a GOT entry. |
| 3434 Mips_output_data_got<size, big_endian>* got = |
| 3435 target->got_section(symtab, layout); |
| 3436 |
| 3437 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 3438 |
| 3439 if (got->add_local(object, r_sym, GOT_TYPE_STANDARD)) |
| 3440 { |
| 3441 // If we are generating a shared object, we need to add a |
| 3442 // dynamic RELATIVE relocation for this symbol's GOT entry. |
| 3443 /* if (parameters->options().output_is_position_independent()) |
| 3444 { |
| 3445 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 3446 unsigned int r_sym = elfcpp::elf_r_sym<size>( |
| 3447 reloc.get_r_info()); |
| 3448 rel_dyn->add_local_relative( |
| 3449 object, r_sym, elfcpp::R_MIPS_GOT16, got, |
| 3450 object->local_got_offset(r_sym, GOT_TYPE_STANDARD)); |
| 3451 }*/ |
| 3452 } |
| 3453 } |
| 3454 break; |
| 3455 case elfcpp::R_MIPS_GPREL32: |
| 3456 case elfcpp::R_MIPS_GPREL16: |
| 3457 case elfcpp::R_MIPS16_GPREL: |
| 3458 case elfcpp::R_MIPS_LITERAL: |
| 3459 break; |
| 3460 case elfcpp::R_MIPS_NONE: |
| 3461 case elfcpp::R_MIPS_16: |
| 3462 break; |
| 3463 case elfcpp::R_MIPS_32: |
| 3464 { |
| 3465 if (parameters->options().output_is_position_independent()) |
| 3466 { |
| 3467 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 3468 unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info()); |
| 3469 |
| 3470 rel_dyn->add_symbolless_local_addend(object, r_sym, elfcpp::R_MIPS_R
EL32, |
| 3471 output_section, data_shndx, |
| 3472 reloc.get_r_offset()); |
| 3473 } |
| 3474 } |
| 3475 case elfcpp::R_MIPS_REL32: |
| 3476 case elfcpp::R_MIPS_26: |
| 3477 case elfcpp::R_MIPS_HI16: |
| 3478 case elfcpp::R_MIPS_LO16: |
| 3479 case elfcpp::R_MIPS_PC16: |
| 3480 case elfcpp::R_MIPS_UNUSED1: |
| 3481 case elfcpp::R_MIPS_UNUSED2: |
| 3482 case elfcpp::R_MIPS_UNUSED3: |
| 3483 case elfcpp::R_MIPS_SHIFT5: |
| 3484 case elfcpp::R_MIPS_SHIFT6: |
| 3485 case elfcpp::R_MIPS_64: |
| 3486 case elfcpp::R_MIPS_GOT_PAGE: |
| 3487 case elfcpp::R_MIPS_GOT_OFST: |
| 3488 case elfcpp::R_MIPS_SUB: |
| 3489 case elfcpp::R_MIPS_INSERT_A: |
| 3490 case elfcpp::R_MIPS_INSERT_B: |
| 3491 case elfcpp::R_MIPS_DELETE: |
| 3492 case elfcpp::R_MIPS_HIGHER: |
| 3493 case elfcpp::R_MIPS_HIGHEST: |
| 3494 case elfcpp::R_MIPS_SCN_DISP: |
| 3495 case elfcpp::R_MIPS_REL16: |
| 3496 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 3497 case elfcpp::R_MIPS_PJUMP: |
| 3498 case elfcpp::R_MIPS_RELGOT: |
| 3499 case elfcpp::R_MIPS_JALR: |
| 3500 case elfcpp::R_MIPS_GLOB_DAT: |
| 3501 case elfcpp::R_MIPS16_26: |
| 3502 case elfcpp::R_MIPS16_HI16: |
| 3503 case elfcpp::R_MIPS16_LO16: |
| 3504 case elfcpp::R_MIPS_COPY: |
| 3505 case elfcpp::R_MIPS_JUMP_SLOT: |
| 3506 case elfcpp::R_MIPS_PC32: |
| 3507 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 3508 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 3509 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 3510 break; |
| 3511 |
| 3512 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 3513 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 3514 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 3515 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 3516 case elfcpp::R_MIPS_TLS_GD: |
| 3517 case elfcpp::R_MIPS_TLS_LDM: |
| 3518 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 3519 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 3520 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 3521 case elfcpp::R_MIPS_TLS_TPREL32: |
| 3522 case elfcpp::R_MIPS_TLS_TPREL64: |
| 3523 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 3524 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 3525 { |
| 3526 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 3527 if(object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)) |
| 3528 break; |
| 3529 |
| 3530 bool output_is_shared = parameters->options().shared(); |
| 3531 const tls::Tls_optimization optimized_type |
| 3532 = Target_mips<size, big_endian>::optimize_tls_reloc( |
| 3533 !output_is_shared, r_type); |
| 3534 switch (r_type) |
| 3535 { |
| 3536 case elfcpp::R_MIPS_TLS_GD: |
| 3537 if (optimized_type == tls::TLSOPT_NONE) |
| 3538 { |
| 3539 // Create a pair of GOT entries for the module index and |
| 3540 // dtv-relative offset. |
| 3541 Mips_output_data_got<size, big_endian>* got |
| 3542 = target->got_section(symtab, layout); |
| 3543 unsigned int shndx = lsym.get_st_shndx(); |
| 3544 bool is_ordinary; |
| 3545 shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); |
| 3546 if (!is_ordinary) |
| 3547 { |
| 3548 object->error(_("local symbol %u has bad shndx %u"), |
| 3549 r_sym, shndx); |
| 3550 break; |
| 3551 } |
| 3552 |
| 3553 got->add_tls_gd_local_reloc(GOT_TYPE_TLS_PAIR, object, r_sym); |
| 3554 } |
| 3555 else |
| 3556 // FIXME: TLS optimization not supported yet. |
| 3557 gold_unreachable(); |
| 3558 break; |
| 3559 |
| 3560 case elfcpp::R_MIPS_TLS_LDM: |
| 3561 if (optimized_type == tls::TLSOPT_NONE) |
| 3562 { |
| 3563 // Create a GOT entry for the module index. |
| 3564 target->got_mod_index_entry(symtab, layout, object); |
| 3565 } |
| 3566 else |
| 3567 // FIXME: TLS optimization not supported yet. |
| 3568 gold_unreachable(); |
| 3569 break; |
| 3570 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 3571 layout->set_has_static_tls(); |
| 3572 if (optimized_type == tls::TLSOPT_NONE) |
| 3573 { |
| 3574 // Create a GOT entry for the tp-relative offset. |
| 3575 Mips_output_data_got<size, big_endian>* got |
| 3576 = target->got_section(symtab, layout); |
| 3577 if (!parameters->doing_static_link()) |
| 3578 got->add_local_with_rel(object, r_sym, GOT_TYPE_TLS_OFFSET, |
| 3579 target->rel_dyn_section(layout), |
| 3580 size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 : |
| 3581 elfcpp::R_MIPS_TLS_TPREL64); |
| 3582 else if (!object->local_has_got_offset(r_sym, |
| 3583 GOT_TYPE_TLS_OFFSET)) |
| 3584 { |
| 3585 got->add_local(object, r_sym, GOT_TYPE_TLS_OFFSET); |
| 3586 |
| 3587 unsigned int got_offset = |
| 3588 object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET); |
| 3589 got->add_static_reloc(got_offset, |
| 3590 size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 : |
| 3591 elfcpp::R_MIPS_TLS_TPREL64, object, |
| 3592 r_sym); |
| 3593 } |
| 3594 } |
| 3595 else |
| 3596 // FIXME: TLS optimization not supported yet. |
| 3597 gold_unreachable(); |
| 3598 break; |
| 3599 |
| 3600 default: // TODO AS: Check if this is correct at all |
| 3601 layout->set_has_static_tls(); |
| 3602 if (output_is_shared) |
| 3603 { |
| 3604 // We need to create a dynamic relocation. |
| 3605 gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION); |
| 3606 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 3607 rel_dyn->add_local(object, r_sym, size == 32 ? |
| 3608 elfcpp::R_MIPS_TLS_TPREL32 : |
| 3609 elfcpp::R_MIPS_TLS_TPREL64, |
| 3610 output_section, data_shndx, |
| 3611 reloc.get_r_offset()); |
| 3612 } |
| 3613 break; |
| 3614 } |
| 3615 } |
| 3616 break; |
| 3617 |
| 3618 default: |
| 3619 unsupported_reloc_local(object, r_type); |
| 3620 break; |
| 3621 } |
| 3622 } |
| 3623 |
| 3624 template<int size, bool big_endian> |
| 3625 void |
| 3626 Mips_output_data_got<size, big_endian>::do_write(Output_file* of) |
| 3627 { |
| 3628 typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; |
| 3629 |
| 3630 // Call parent to write out GOT. |
| 3631 Output_data_got<size, big_endian>::do_write(of); |
| 3632 |
| 3633 // Collect views for later fixing values of .got section |
| 3634 if(!this->got16_views_.empty()) |
| 3635 { |
| 3636 const off_t offset = this->offset(); |
| 3637 const section_size_type oview_size = |
| 3638 convert_to_section_size_type(this->data_size()); |
| 3639 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 3640 |
| 3641 this->got_view_ = oview; |
| 3642 } |
| 3643 |
| 3644 // We are done if there is no fix up. |
| 3645 if (this->static_relocs_.empty()) |
| 3646 return; |
| 3647 |
| 3648 const off_t offset = this->offset(); |
| 3649 const section_size_type oview_size = |
| 3650 convert_to_section_size_type(this->data_size()); |
| 3651 unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 3652 |
| 3653 Output_segment* tls_segment = this->layout_->tls_segment(); |
| 3654 gold_assert(tls_segment != NULL); |
| 3655 |
| 3656 for (size_t i = 0; i < this->static_relocs_.size(); ++i) |
| 3657 { |
| 3658 Static_reloc& reloc(this->static_relocs_[i]); |
| 3659 |
| 3660 Mips_address value; |
| 3661 if (!reloc.symbol_is_global()) |
| 3662 { |
| 3663 Sized_relobj_file<size, big_endian>* object = reloc.relobj(); |
| 3664 const Symbol_value<size>* psymval = |
| 3665 reloc.relobj()->local_symbol(reloc.index()); |
| 3666 |
| 3667 // We are doing static linking. Issue an error and skip this |
| 3668 // relocation if the symbol is undefined or in a discarded_section. |
| 3669 bool is_ordinary; |
| 3670 unsigned int shndx = psymval->input_shndx(&is_ordinary); |
| 3671 if ((shndx == elfcpp::SHN_UNDEF) |
| 3672 || (is_ordinary |
| 3673 && shndx != elfcpp::SHN_UNDEF |
| 3674 && !object->is_section_included(shndx) |
| 3675 && !this->symbol_table_->is_section_folded(object, shndx))) |
| 3676 { |
| 3677 gold_error(_("undefined or discarded local symbol %u from " |
| 3678 " object %s in GOT"), |
| 3679 reloc.index(), reloc.relobj()->name().c_str()); |
| 3680 continue; |
| 3681 } |
| 3682 |
| 3683 value = psymval->value(object, 0); |
| 3684 } |
| 3685 else |
| 3686 { |
| 3687 const Symbol* gsym = reloc.symbol(); |
| 3688 gold_assert(gsym != NULL); |
| 3689 if (gsym->is_forwarder()) |
| 3690 gsym = this->symbol_table_->resolve_forwards(gsym); |
| 3691 |
| 3692 // We are doing static linking. Issue an error and skip this |
| 3693 // relocation if the symbol is undefined or in a discarded_section |
| 3694 // unless it is a weakly_undefined symbol. |
| 3695 if ((gsym->is_defined_in_discarded_section() |
| 3696 || gsym->is_undefined()) |
| 3697 && !gsym->is_weak_undefined()) |
| 3698 { |
| 3699 gold_error(_("undefined or discarded symbol %s in GOT"), |
| 3700 gsym->name()); |
| 3701 continue; |
| 3702 } |
| 3703 |
| 3704 if (!gsym->is_weak_undefined()) |
| 3705 { |
| 3706 const Sized_symbol<size>* sym = |
| 3707 static_cast<const Sized_symbol<size>*>(gsym); |
| 3708 value = sym->value(); |
| 3709 } |
| 3710 else |
| 3711 value = 0; |
| 3712 } |
| 3713 |
| 3714 unsigned got_offset = reloc.got_offset(); |
| 3715 gold_assert(got_offset < oview_size); |
| 3716 |
| 3717 typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; |
| 3718 Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset); |
| 3719 Valtype x; |
| 3720 |
| 3721 switch (reloc.r_type()) |
| 3722 { |
| 3723 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 3724 x = value; |
| 3725 break; |
| 3726 case elfcpp::R_MIPS_TLS_TPREL32: |
| 3727 x = value - elfcpp::TP_OFFSET; |
| 3728 break; |
| 3729 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 3730 x = value - elfcpp::DTP_OFFSET; |
| 3731 break; |
| 3732 default: |
| 3733 gold_unreachable(); |
| 3734 break; |
| 3735 } |
| 3736 |
| 3737 elfcpp::Swap<size, big_endian>::writeval(wv, x); |
| 3738 } |
| 3739 |
| 3740 of->write_output_view(offset, oview_size, oview); |
| 3741 } |
| 3742 |
| 3743 // Scan a relocation for a global symbol. |
| 3744 |
| 3745 template<int size, bool big_endian> |
| 3746 inline void |
| 3747 Target_mips<size, big_endian>::Scan::global( |
| 3748 Symbol_table* symtab, |
| 3749 Layout* layout, |
| 3750 Target_mips<size, big_endian>* target, |
| 3751 Sized_relobj_file<size, big_endian>* object, |
| 3752 unsigned int data_shndx, |
| 3753 Output_section* output_section, |
| 3754 const elfcpp::Rel<size, big_endian>& reloc, |
| 3755 unsigned int r_type, |
| 3756 Symbol* gsym) |
| 3757 { |
| 3758 // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got |
| 3759 // section. We check here to avoid creating a dynamic reloc against |
| 3760 // _GLOBAL_OFFSET_TABLE_. |
| 3761 if (!target->has_got_section() |
| 3762 && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) |
| 3763 target->got_section(symtab, layout); |
| 3764 |
| 3765 // TODO AS: Check where to put this code!!!!! |
| 3766 if(!parameters->options().shared()) |
| 3767 if((this->symbol_needs_plt_entry(gsym)) && (!gsym->has_plt_offset())) |
| 3768 { |
| 3769 if (gsym->object() != object) |
| 3770 { |
| 3771 if(parameters->options().output_is_position_independent()) |
| 3772 { |
| 3773 gold_assert(!gsym->has_dynsym_index()); |
| 3774 target->make_mips_stubs_entry(symtab, layout, gsym); |
| 3775 } |
| 3776 else if(gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))
) |
| 3777 { |
| 3778 target->make_plt_entry(symtab, layout, gsym); |
| 3779 } |
| 3780 } |
| 3781 |
| 3782 // Since this is not a PC-relative relocation, we may be |
| 3783 // taking the address of a function. In that case we need to |
| 3784 // set the entry in the dynamic symbol table to the address of |
| 3785 // the PLT entry. |
| 3786 if(((gsym->is_from_dynobj() && !parameters->options().shared()) || |
| 3787 ((this->get_reference_flags(r_type) == Symbol::ABSOLUTE_REF) |
| 3788 && !(parameters->options().output_is_position_independent()))) |
| 3789 && (gsym->has_plt_offset())) |
| 3790 { |
| 3791 gsym->set_needs_dynsym_value(); |
| 3792 gsym->set_nonvis(elfcpp::STO_MIPS_PLT>>2); |
| 3793 } |
| 3794 } |
| 3795 |
| 3796 if((gsym->has_plt_offset()) |
| 3797 && (parameters->options().output_is_position_independent())) |
| 3798 switch(r_type) |
| 3799 { |
| 3800 case elfcpp::R_MIPS_HI16: |
| 3801 case elfcpp::R_MIPS_LO16: |
| 3802 case elfcpp::R_MIPS_CALL16: |
| 3803 case elfcpp::R_MIPS_JALR: |
| 3804 break; |
| 3805 default: |
| 3806 target->remove_stub_entry(gsym); |
| 3807 break; |
| 3808 } |
| 3809 |
| 3810 switch (r_type) |
| 3811 { |
| 3812 case elfcpp::R_MIPS_NONE: |
| 3813 case elfcpp::R_MIPS_UNUSED1: |
| 3814 case elfcpp::R_MIPS_UNUSED2: |
| 3815 case elfcpp::R_MIPS_UNUSED3: |
| 3816 case elfcpp::R_MIPS_INSERT_A: |
| 3817 case elfcpp::R_MIPS_INSERT_B: |
| 3818 case elfcpp::R_MIPS_DELETE: |
| 3819 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 3820 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 3821 case elfcpp::R_MIPS_REL16: |
| 3822 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 3823 case elfcpp::R_MIPS_PJUMP: |
| 3824 case elfcpp::R_MIPS_RELGOT: |
| 3825 case elfcpp::R_MIPS_TLS_TPREL64: |
| 3826 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 3827 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 3828 break; |
| 3829 case elfcpp::R_MIPS_GOT16: |
| 3830 case elfcpp::R_MIPS16_GOT16: |
| 3831 case elfcpp::R_MIPS_CALL16: |
| 3832 case elfcpp::R_MIPS16_CALL16: |
| 3833 case elfcpp::R_MIPS_GOT_DISP: |
| 3834 case elfcpp::R_MIPS_GOT_HI16: |
| 3835 case elfcpp::R_MIPS_CALL_HI16: |
| 3836 case elfcpp::R_MIPS_GOT_LO16: |
| 3837 case elfcpp::R_MIPS_CALL_LO16: |
| 3838 case elfcpp::R_MIPS_GOT_PAGE: |
| 3839 case elfcpp::R_MIPS_GOT_OFST: |
| 3840 { |
| 3841 // The symbol requires a GOT entry. |
| 3842 Mips_output_data_got<size, big_endian>* got = |
| 3843 target->got_section(symtab, layout); |
| 3844 if(!gsym->final_value_is_known() |
| 3845 || (parameters->options().output_is_position_independent())) |
| 3846 got->add_global_with_reloc_mips(gsym); |
| 3847 else |
| 3848 { |
| 3849 got->add_global(gsym, GOT_TYPE_STANDARD); |
| 3850 gsym->set_needs_dynsym_entry(); |
| 3851 } |
| 3852 |
| 3853 } |
| 3854 break; |
| 3855 case elfcpp::R_MIPS_LITERAL: |
| 3856 gold_error(_("%s:R_MIPS_LITERAL is defined only for local symbols"), |
| 3857 object->name().c_str()); |
| 3858 break; |
| 3859 case elfcpp::R_MIPS_GPREL32: |
| 3860 gold_error(_("%s:R_MIPS_GPREL32 not defined for global symbols"), |
| 3861 object->name().c_str()); |
| 3862 case elfcpp::R_MIPS_GPREL16: |
| 3863 case elfcpp::R_MIPS16_GPREL: |
| 3864 case elfcpp::R_MIPS16_26: |
| 3865 break; |
| 3866 case elfcpp::R_MIPS_26: |
| 3867 case elfcpp::R_MIPS_PC16: |
| 3868 { |
| 3869 const unsigned char* pehdr = gsym->object()->get_view( |
| 3870 elfcpp::file_header_offset, |
| 3871 elfcpp::Elf_sizes<size>::ehdr_size, |
| 3872 true, false); |
| 3873 |
| 3874 elfcpp::Ehdr<size, big_endian> ehdr(pehdr); |
| 3875 |
| 3876 if(((ehdr.get_e_flags() & elfcpp::EF_MIPS_PIC) != 0) |
| 3877 && (gsym->is_defined_in_discarded_section() == false) |
| 3878 && (gsym->is_func()) |
| 3879 && (!gsym->has_plt_offset()) |
| 3880 && (gsym->object() != object)) |
| 3881 { |
| 3882 bool is_ordinary = false; |
| 3883 |
| 3884 target->make_stub_entry(layout); |
| 3885 target->set_stub_flag(); |
| 3886 |
| 3887 // If the function is at the beginning of the section and if we |
| 3888 // would need no more than 2 nops. |
| 3889 // TODO AS: For now we only support stubs of second type |
| 3890 if((((Sized_symbol<size> *)gsym)->value() == 0) |
| 3891 &&(gsym->object()->section_addralign(gsym->shndx(&is_ordinary)) |
| 3892 <= 16)) |
| 3893 { |
| 3894 if(target->stub_symbol(gsym->name()) == NULL) |
| 3895 target->stub_->add_entry(symtab, target, gsym); |
| 3896 } |
| 3897 else |
| 3898 { |
| 3899 if(target->stub_symbol(gsym->name()) == NULL) |
| 3900 target->stub_->add_entry(symtab, target, gsym); |
| 3901 } |
| 3902 } |
| 3903 break; |
| 3904 } |
| 3905 case elfcpp::R_MIPS_16: |
| 3906 case elfcpp::R_MIPS_SHIFT5: |
| 3907 case elfcpp::R_MIPS_SHIFT6: |
| 3908 case elfcpp::R_MIPS_SUB: |
| 3909 case elfcpp::R_MIPS_HIGHER: |
| 3910 case elfcpp::R_MIPS_HIGHEST: |
| 3911 case elfcpp::R_MIPS_SCN_DISP: |
| 3912 case elfcpp::R_MIPS16_HI16: |
| 3913 case elfcpp::R_MIPS16_LO16: |
| 3914 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 3915 case elfcpp::R_MIPS_PC32: |
| 3916 break; |
| 3917 case elfcpp::R_MIPS_HI16: |
| 3918 case elfcpp::R_MIPS_LO16: |
| 3919 case elfcpp::R_MIPS_32: |
| 3920 case elfcpp::R_MIPS_64: |
| 3921 // Absolute addressing relocations. |
| 3922 { |
| 3923 // Make a dynamic relocation if necessary. |
| 3924 if(gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
| 3925 { |
| 3926 if(gsym->may_need_copy_reloc() && gsym->in_dyn() |
| 3927 && !((r_type == elfcpp::R_MIPS_32) || (r_type == elfcpp::R_MIPS_64
))) |
| 3928 { |
| 3929 target->copy_reloc(symtab, layout, object, |
| 3930 data_shndx, output_section, gsym, reloc); |
| 3931 } |
| 3932 else if((r_type == elfcpp::R_MIPS_32) || (r_type == elfcpp::R_MIPS_6
4)) |
| 3933 { |
| 3934 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 3935 Mips_output_data_got<size, big_endian>* |
| 3936 got = target->got_section(symtab, layout); |
| 3937 |
| 3938 if(!gsym->final_value_is_known() |
| 3939 || (parameters->options().output_is_position_independent())) |
| 3940 got->add_global_with_reloc_mips(gsym); |
| 3941 |
| 3942 rel_dyn->add_global(gsym, elfcpp::R_MIPS_REL32, output_section,
object, |
| 3943 data_shndx, reloc.get_r_offset()); |
| 3944 } |
| 3945 } |
| 3946 } |
| 3947 break; |
| 3948 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 3949 case elfcpp::R_MIPS_TLS_GD: |
| 3950 case elfcpp::R_MIPS_TLS_LDM: |
| 3951 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 3952 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 3953 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 3954 case elfcpp::R_MIPS_TLS_TPREL32: |
| 3955 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 3956 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 3957 { |
| 3958 if(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)) |
| 3959 break; |
| 3960 |
| 3961 const bool is_final = gsym->final_value_is_known(); |
| 3962 const tls::Tls_optimization optimized_type = |
| 3963 Target_mips<size, big_endian>::optimize_tls_reloc(is_final, r_type); |
| 3964 //unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 3965 |
| 3966 switch (r_type) |
| 3967 { |
| 3968 case elfcpp::R_MIPS_TLS_GD: |
| 3969 if (optimized_type == tls::TLSOPT_NONE) |
| 3970 { |
| 3971 // Create a pair of GOT entries for the module index and |
| 3972 // dtv-relative offset. |
| 3973 Mips_output_data_got<size, big_endian>* got |
| 3974 = target->got_section(symtab, layout); |
| 3975 if (!parameters->doing_static_link()) |
| 3976 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR, |
| 3977 target->rel_dyn_section(layout), |
| 3978 size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 : |
| 3979 elfcpp::R_MIPS_TLS_DTPMOD64, |
| 3980 size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 : |
| 3981 elfcpp::R_MIPS_TLS_DTPREL64); |
| 3982 else |
| 3983 got->add_tls_gd_with_static_reloc(GOT_TYPE_TLS_PAIR, gsym); |
| 3984 } |
| 3985 else |
| 3986 // FIXME: TLS optimization not supported yet. |
| 3987 gold_unreachable(); |
| 3988 break; |
| 3989 |
| 3990 case elfcpp::R_MIPS_TLS_LDM: |
| 3991 if (optimized_type == tls::TLSOPT_NONE) |
| 3992 // Create a GOT entry for the module index. |
| 3993 target->got_mod_index_entry(symtab, layout, object); |
| 3994 else |
| 3995 // FIXME: TLS optimization not supported yet. |
| 3996 gold_unreachable(); |
| 3997 break; |
| 3998 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 3999 layout->set_has_static_tls(); |
| 4000 if (optimized_type == tls::TLSOPT_NONE) |
| 4001 { |
| 4002 // Create a GOT entry for the tp-relative offset. |
| 4003 Mips_output_data_got<size, big_endian>* got |
| 4004 = target->got_section(symtab, layout); |
| 4005 if (!parameters->doing_static_link()) |
| 4006 got->add_global_tls_with_reloc_mips(gsym, target->rel_dyn_sect
ion(layout), |
| 4007 elfcpp::R_MIPS_TLS_TPREL32); |
| 4008 else if (!gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)) |
| 4009 { |
| 4010 got->add_global(gsym, GOT_TYPE_TLS_OFFSET); |
| 4011 unsigned int got_offset = |
| 4012 gsym->got_offset(GOT_TYPE_TLS_OFFSET); |
| 4013 got->add_static_reloc(got_offset, |
| 4014 size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 : |
| 4015 elfcpp::R_MIPS_TLS_TPREL64, gsym); |
| 4016 } |
| 4017 } |
| 4018 else |
| 4019 // FIXME: TLS optimization not supported yet. |
| 4020 gold_unreachable(); |
| 4021 break; |
| 4022 |
| 4023 default: |
| 4024 layout->set_has_static_tls(); |
| 4025 if (parameters->options().shared()) |
| 4026 { |
| 4027 // We need to create a dynamic relocation. |
| 4028 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 4029 rel_dyn->add_global(gsym, |
| 4030 size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 : |
| 4031 elfcpp::R_MIPS_TLS_TPREL64, |
| 4032 output_section, object, |
| 4033 data_shndx, reloc.get_r_offset()); |
| 4034 } |
| 4035 break; |
| 4036 } |
| 4037 } |
| 4038 break; |
| 4039 case elfcpp::R_MIPS_REL32: |
| 4040 // Relative addressing relocations. |
| 4041 { |
| 4042 // Make a dynamic relocation if necessary. |
| 4043 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
| 4044 { |
| 4045 if(gsym->may_need_copy_reloc()) |
| 4046 target->copy_reloc(symtab, layout, object, |
| 4047 data_shndx, output_section, gsym, reloc); |
| 4048 else |
| 4049 { |
| 4050 check_non_pic(object, r_type); |
| 4051 Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
| 4052 rel_dyn->add_global(gsym, r_type, output_section, object, |
| 4053 data_shndx, reloc.get_r_offset()); |
| 4054 } |
| 4055 } |
| 4056 } |
| 4057 break; |
| 4058 case elfcpp::R_MIPS_JALR: |
| 4059 break; |
| 4060 case elfcpp::R_MIPS_COPY: |
| 4061 case elfcpp::R_MIPS_GLOB_DAT: |
| 4062 case elfcpp::R_MIPS_JUMP_SLOT: |
| 4063 // These are relocations which should only be seen by the |
| 4064 // dynamic linker, and should never be seen here. |
| 4065 gold_error(_("%s: unexpected reloc %u in object file"), |
| 4066 object->name().c_str(), r_type); |
| 4067 break; |
| 4068 |
| 4069 default: |
| 4070 unsupported_reloc_global(object, r_type, gsym); |
| 4071 break; |
| 4072 } |
| 4073 } |
| 4074 |
| 4075 // Perform a relocation. |
| 4076 |
| 4077 template<int size, bool big_endian> |
| 4078 inline bool |
| 4079 Target_mips<size, big_endian>::Relocate::relocate( |
| 4080 const Relocate_info<size, big_endian>* relinfo, |
| 4081 Target_mips* target, |
| 4082 Output_section* output_section, |
| 4083 size_t relnum, |
| 4084 const elfcpp::Rel<size, big_endian>& rel, |
| 4085 unsigned int r_type, |
| 4086 const Sized_symbol<size>* gsym, |
| 4087 const Symbol_value<size>* psymval, |
| 4088 unsigned char* view, |
| 4089 typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 4090 section_size_type) |
| 4091 { |
| 4092 typedef Mips_relocate_functions<size, big_endian> Reloc_funcs; |
| 4093 typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY; |
| 4094 |
| 4095 unsigned int got_offset = 0; |
| 4096 const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
| 4097 |
| 4098 Symbol_value<size> symval; |
| 4099 |
| 4100 // __gnu_local_gp is _gp symbol, just swich it |
| 4101 if(gsym && (strcmp(gsym->name(), "__gnu_local_gp") == 0)) |
| 4102 { |
| 4103 gsym = target->gp(); |
| 4104 |
| 4105 gold_assert(gsym != NULL); |
| 4106 |
| 4107 symval.set_output_value(target->gp_address()); |
| 4108 |
| 4109 psymval = &symval; |
| 4110 } |
| 4111 else if(gsym && (strcmp(gsym->name(), "_gp_disp") == 0)) |
| 4112 { |
| 4113 if(r_type != elfcpp::R_MIPS_HI16 && r_type != elfcpp::R_MIPS16_HI16 && |
| 4114 r_type != elfcpp::R_MIPS_LO16 && r_type != elfcpp::R_MIPS16_LO16) |
| 4115 gold_error_at_location(relinfo, relnum, rel.get_r_offset(), |
| 4116 _("relocations against _gp_disp are permitted only" |
| 4117 " with R_MIPS_HI16 and R_MIPS_LO16 relocations.")); |
| 4118 |
| 4119 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 4120 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 4121 Valtype addend = (elfcpp::Swap<32, big_endian>::readval(wv)) & 0xffffU; |
| 4122 Valtype value; |
| 4123 |
| 4124 if (r_type == elfcpp::R_MIPS16_HI16) |
| 4125 value = addend + target->gp_address() - address - 4; |
| 4126 else if(r_type == elfcpp::R_MIPS_HI16) |
| 4127 value = addend + target->gp_address() - address; |
| 4128 else if (r_type == elfcpp::R_MIPS16_LO16) |
| 4129 value = addend + target->gp_address() - address; |
| 4130 else if(r_type == elfcpp::R_MIPS_LO16) |
| 4131 value = addend + target->gp_address() - address + 4; |
| 4132 else |
| 4133 gold_unreachable(); |
| 4134 |
| 4135 symval.set_output_value(value); |
| 4136 |
| 4137 psymval = &symval; |
| 4138 } |
| 4139 |
| 4140 // Get the GOT offset. |
| 4141 // The GOT pointer points to the end of the GOT section. |
| 4142 // We need to subtract the size of the GOT section to get |
| 4143 // the actual offset to use in the relocation. |
| 4144 switch (r_type) |
| 4145 { |
| 4146 case elfcpp::R_MIPS_GOT_DISP: |
| 4147 case elfcpp::R_MIPS_GOT_HI16: |
| 4148 case elfcpp::R_MIPS_CALL_HI16: |
| 4149 case elfcpp::R_MIPS_GOT_LO16: |
| 4150 case elfcpp::R_MIPS_CALL_LO16: |
| 4151 if(gsym != NULL) |
| 4152 { |
| 4153 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); |
| 4154 got_offset = (gsym->got_offset(GOT_TYPE_STANDARD) |
| 4155 - target->got_size()); |
| 4156 } |
| 4157 else |
| 4158 { |
| 4159 unsigned int r_sym = elfcpp::elf_r_sym<size>(rel.get_r_info()); |
| 4160 gold_assert(relinfo->object->local_has_got_offset |
| 4161 (r_sym, GOT_TYPE_STANDARD)); |
| 4162 got_offset = (relinfo->object->local_got_offset |
| 4163 (r_sym, GOT_TYPE_STANDARD) - target->got_size()); |
| 4164 } |
| 4165 break; |
| 4166 case elfcpp::R_MIPS_TLS_GD: |
| 4167 if(gsym != NULL) |
| 4168 { |
| 4169 got_offset = target->got_section()->address() + |
| 4170 gsym->got_offset(GOT_TYPE_TLS_PAIR) - |
| 4171 target->gp_address(); |
| 4172 } |
| 4173 else |
| 4174 { |
| 4175 unsigned int r_sym = elfcpp::elf_r_sym<size>(rel.get_r_info()); |
| 4176 gold_assert(relinfo->object->local_has_got_offset |
| 4177 (r_sym, GOT_TYPE_TLS_PAIR)); |
| 4178 got_offset = target->got_section()->address() + |
| 4179 relinfo->object->local_got_offset(r_sym, GOT_TYPE_TLS_PAIR) - |
| 4180 target->gp_address(); |
| 4181 } |
| 4182 break; |
| 4183 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 4184 if(gsym != NULL) |
| 4185 { |
| 4186 got_offset = target->got_section()->address() + |
| 4187 gsym->got_offset(GOT_TYPE_TLS_OFFSET) - |
| 4188 target->gp_address(); |
| 4189 } |
| 4190 else |
| 4191 { |
| 4192 unsigned int r_sym = elfcpp::elf_r_sym<size>(rel.get_r_info()); |
| 4193 gold_assert(relinfo->object->local_has_got_offset |
| 4194 (r_sym, GOT_TYPE_TLS_OFFSET)); |
| 4195 got_offset = target->got_section()->address() + |
| 4196 relinfo->object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET) - |
| 4197 target->gp_address(); |
| 4198 } |
| 4199 break; |
| 4200 case elfcpp::R_MIPS_TLS_LDM: |
| 4201 // Relocate the field with the offset of the GOT entry for |
| 4202 // the module index. |
| 4203 got_offset = target->got_section()->address() + |
| 4204 (target->got_mod_index_entry(NULL, NULL, NULL)) - |
| 4205 target->gp_address(); |
| 4206 break; |
| 4207 case elfcpp::R_MIPS_GOT_OFST: |
| 4208 if((gsym != NULL) && (!gsym->is_forced_local())) |
| 4209 { |
| 4210 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 4211 typedef typename elfcpp::Swap<16, big_endian>::Valtype Reltype; |
| 4212 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 4213 Reltype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 4214 addend &= 0x0000ffffU; |
| 4215 |
| 4216 got_offset = addend; |
| 4217 break; |
| 4218 } |
| 4219 case elfcpp::R_MIPS_GOT_PAGE: |
| 4220 { |
| 4221 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 4222 typedef typename elfcpp::Swap<16, big_endian>::Valtype Reltype; |
| 4223 Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 4224 Reltype addend = elfcpp::Swap<32, big_endian>::readval(wv); |
| 4225 addend &= 0x0000ffffU; |
| 4226 got_offset = target->got_section()->add_constant(psymval->value(object, |
| 4227 addend) + 0x00008000U) & ~0x0000ffffU; |
| 4228 } |
| 4229 break; |
| 4230 default: |
| 4231 break; |
| 4232 } |
| 4233 |
| 4234 // Pick the value to use for symbols defined in shared objects. |
| 4235 if (gsym != NULL |
| 4236 && gsym->use_plt_offset(Scan::get_reference_flags(r_type))) |
| 4237 { |
| 4238 elfcpp::Elf_Xword value; |
| 4239 |
| 4240 // To avoid problems with symbols that are no longer in .MIPS.stubs |
| 4241 if(gsym->plt_offset() > 0) |
| 4242 { |
| 4243 if(target->is_plt_symbol((Sized_symbol<size> *)gsym)) |
| 4244 value = target->plt_section()->address() + gsym->plt_offset(); |
| 4245 else |
| 4246 value = target->mips_stubs()->address() + |
| 4247 gsym->plt_offset() * (target->mips_stubs()->big_dyn_symtab() ? 20
: 16); |
| 4248 |
| 4249 symval.set_output_value(value); |
| 4250 |
| 4251 psymval = &symval; |
| 4252 } |
| 4253 } |
| 4254 |
| 4255 // Set symbol for use with stub |
| 4256 switch (r_type) |
| 4257 { |
| 4258 case elfcpp::R_MIPS_26: |
| 4259 case elfcpp::R_MIPS_PC16: |
| 4260 case elfcpp::R_MIPS16_26: |
| 4261 { |
| 4262 if(target->stub_flag()) |
| 4263 { |
| 4264 if(gsym == NULL) |
| 4265 break; |
| 4266 |
| 4267 Sized_symbol<size> * sym = static_cast<Sized_symbol<size>*> |
| 4268 (target->stub_symbol(gsym->name())); |
| 4269 if(sym != NULL) |
| 4270 { |
| 4271 symval.set_output_value(sym->value()); |
| 4272 psymval = &symval; |
| 4273 } |
| 4274 } |
| 4275 } |
| 4276 break; |
| 4277 default: |
| 4278 break; |
| 4279 } |
| 4280 |
| 4281 switch (r_type) |
| 4282 { |
| 4283 case elfcpp::R_MIPS_NONE: |
| 4284 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 4285 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 4286 break; |
| 4287 case elfcpp::R_MIPS_16: |
| 4288 reloc_status = Reloc_funcs::rel16(view, object, psymval); |
| 4289 break; |
| 4290 case elfcpp::R_MIPS_32: |
| 4291 if((gsym != NULL) |
| 4292 && ((parameters->options().shared()) |
| 4293 || (parameters->options().pie()))) |
| 4294 break; |
| 4295 |
| 4296 reloc_status = Reloc_funcs::rel32(view, object, psymval); |
| 4297 break; |
| 4298 case elfcpp::R_MIPS_REL32: |
| 4299 if(parameters->options().shared() && (gsym != NULL)) |
| 4300 break; |
| 4301 case elfcpp::R_MIPS_PC32: |
| 4302 reloc_status = Reloc_funcs::relrel32(view, object, psymval, address); |
| 4303 break; |
| 4304 case elfcpp::R_MIPS_26: |
| 4305 // TODO AS: Check if this is correct. |
| 4306 if(gsym != NULL) |
| 4307 reloc_status = Reloc_funcs::rel26(view, object, psymval, address, |
| 4308 gsym->is_forced_local()); |
| 4309 else |
| 4310 reloc_status = Reloc_funcs::rel26(view, object, psymval, address, |
| 4311 false); |
| 4312 break; |
| 4313 case elfcpp::R_MIPS_HI16: |
| 4314 case elfcpp::R_MIPS16_HI16: |
| 4315 reloc_status = Reloc_funcs::relhi16(view, psymval->value(object, 0)); |
| 4316 break; |
| 4317 case elfcpp::R_MIPS_LO16: |
| 4318 case elfcpp::R_MIPS16_LO16: |
| 4319 reloc_status = Reloc_funcs::rello16(view, object, psymval); |
| 4320 break; |
| 4321 case elfcpp::R_MIPS_GPREL16: |
| 4322 case elfcpp::R_MIPS16_GPREL: |
| 4323 case elfcpp::R_MIPS_LITERAL: |
| 4324 reloc_status = Reloc_funcs::relgprel(view, object, psymval, |
| 4325 target->gp_address()); |
| 4326 break; |
| 4327 case elfcpp::R_MIPS_GOT16: |
| 4328 case elfcpp::R_MIPS_CALL16: |
| 4329 case elfcpp::R_MIPS16_GOT16: |
| 4330 case elfcpp::R_MIPS16_CALL16: |
| 4331 { |
| 4332 typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; |
| 4333 Mips_output_data_got<size, big_endian>* got = target->got_section(); |
| 4334 Valtype got_offset; |
| 4335 |
| 4336 if(gsym == NULL) |
| 4337 { |
| 4338 std::stringstream tmp; |
| 4339 tmp << static_cast<unsigned int> (rel.get_r_info()) |
| 4340 << static_cast<unsigned int> (reinterpret_cast<unsigned long long>
(object)) |
| 4341 << static_cast<unsigned int> (rel.get_r_offset()); |
| 4342 std::string key = tmp.str(); |
| 4343 |
| 4344 got_offset = got->got16_offset(key); |
| 4345 } |
| 4346 else |
| 4347 got_offset = gsym->got_offset(GOT_TYPE_STANDARD); |
| 4348 |
| 4349 unsigned char* got_view = got_offset + |
| 4350 (unsigned char* const)got->got_view(); |
| 4351 |
| 4352 reloc_status = Reloc_funcs::relgot16(view, object, psymval, |
| 4353 target->gp_address(), got_view, |
| 4354 got->address(), got_offset, |
| 4355 gsym); |
| 4356 } |
| 4357 break; |
| 4358 case elfcpp::R_MIPS_PC16: |
| 4359 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 4360 reloc_status = Reloc_funcs::relpc16(view, object, psymval, address); |
| 4361 break; |
| 4362 case elfcpp::R_MIPS_GPREL32: |
| 4363 reloc_status = Reloc_funcs::relgprel32(view, object, psymval, |
| 4364 target->gp_address()); |
| 4365 break; |
| 4366 case elfcpp::R_MIPS_UNUSED1: |
| 4367 case elfcpp::R_MIPS_UNUSED2: |
| 4368 case elfcpp::R_MIPS_UNUSED3: |
| 4369 break; |
| 4370 case elfcpp::R_MIPS_SHIFT5: |
| 4371 reloc_status = Reloc_funcs::relsh5(view, object, psymval); |
| 4372 break; |
| 4373 case elfcpp::R_MIPS_SHIFT6: |
| 4374 reloc_status = Reloc_funcs::relsh6(view, object, psymval); |
| 4375 break; |
| 4376 case elfcpp::R_MIPS_64: |
| 4377 if(parameters->options().shared() && (gsym != NULL)) |
| 4378 break; |
| 4379 |
| 4380 reloc_status = Reloc_funcs::rel64(view, object, psymval); |
| 4381 break; |
| 4382 case elfcpp::R_MIPS_GOT_HI16: |
| 4383 case elfcpp::R_MIPS_CALL_HI16: |
| 4384 got_offset = ((got_offset + 0x8000) >> 16); |
| 4385 case elfcpp::R_MIPS_GOT_LO16: |
| 4386 case elfcpp::R_MIPS_CALL_LO16: |
| 4387 case elfcpp::R_MIPS_GOT_OFST: |
| 4388 case elfcpp::R_MIPS_GOT_PAGE: |
| 4389 case elfcpp::R_MIPS_GOT_DISP: |
| 4390 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 4391 case elfcpp::R_MIPS_TLS_GD: |
| 4392 case elfcpp::R_MIPS_TLS_LDM: |
| 4393 reloc_status = Reloc_funcs::relgotofst(view, got_offset); |
| 4394 break; |
| 4395 case elfcpp::R_MIPS_SUB: |
| 4396 reloc_status = Reloc_funcs::relsub(view, object, psymval); |
| 4397 break; |
| 4398 case elfcpp::R_MIPS_INSERT_A: |
| 4399 case elfcpp::R_MIPS_INSERT_B: |
| 4400 case elfcpp::R_MIPS_DELETE: |
| 4401 break; |
| 4402 case elfcpp::R_MIPS_HIGHER: |
| 4403 reloc_status = Reloc_funcs::relhigher(view, object, psymval); |
| 4404 break; |
| 4405 case elfcpp::R_MIPS_HIGHEST: |
| 4406 reloc_status = Reloc_funcs::relhighest(view, object, psymval); |
| 4407 break; |
| 4408 case elfcpp::R_MIPS_SCN_DISP: |
| 4409 reloc_status = Reloc_funcs::relscndisp(view, object, psymval, |
| 4410 output_section->offset()); |
| 4411 break; |
| 4412 case elfcpp::R_MIPS_REL16: |
| 4413 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 4414 case elfcpp::R_MIPS_PJUMP: |
| 4415 case elfcpp::R_MIPS_RELGOT: |
| 4416 break; |
| 4417 case elfcpp::R_MIPS_JALR: |
| 4418 if((gsym != NULL) && !(gsym->final_value_is_known())) |
| 4419 break; |
| 4420 |
| 4421 reloc_status = Reloc_funcs::reljalr(view, object, psymval, address); |
| 4422 break; |
| 4423 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 4424 reloc_status = Reloc_funcs::tlsrel32(view, object, psymval, elfcpp::DTP_OF
FSET); |
| 4425 break; |
| 4426 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 4427 reloc_status = Reloc_funcs::tlsrello16(view, object, psymval, elfcpp::DTP_
OFFSET); |
| 4428 break; |
| 4429 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 4430 reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval, elfcpp::DTP_
OFFSET); |
| 4431 break; |
| 4432 case elfcpp::R_MIPS_TLS_TPREL32: |
| 4433 reloc_status = Reloc_funcs::tlsrel32(view, object, psymval, elfcpp::TP_OFF
SET); |
| 4434 break; |
| 4435 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 4436 reloc_status = Reloc_funcs::tlsrello16(view, object, psymval, elfcpp::TP_O
FFSET); |
| 4437 break; |
| 4438 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 4439 reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval, elfcpp::TP_O
FFSET); |
| 4440 break; |
| 4441 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 4442 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 4443 case elfcpp::R_MIPS_TLS_TPREL64: |
| 4444 case elfcpp::R_MIPS_TLS_DTPMOD32: // TODO AS! For now this reloc do nothing. |
| 4445 break; |
| 4446 case elfcpp::R_MIPS_GLOB_DAT: |
| 4447 reloc_status = Reloc_funcs::relglob(view, object, psymval); |
| 4448 break; |
| 4449 default: |
| 4450 gold_error_at_location(relinfo, relnum, rel.get_r_offset(), |
| 4451 _("unsupported reloc %u"), r_type); |
| 4452 break; |
| 4453 } |
| 4454 |
| 4455 // Report any errors. |
| 4456 switch (reloc_status) |
| 4457 { |
| 4458 case Reloc_funcs::STATUS_OKAY: |
| 4459 break; |
| 4460 case Reloc_funcs::STATUS_OVERFLOW: |
| 4461 gold_error_at_location(relinfo, relnum, rel.get_r_offset(), |
| 4462 _("relocation overflow")); |
| 4463 break; |
| 4464 case Reloc_funcs::STATUS_BAD_RELOC: |
| 4465 gold_error_at_location( |
| 4466 relinfo, |
| 4467 relnum, |
| 4468 rel.get_r_offset(), |
| 4469 _("unexpected opcode while processing relocation")); |
| 4470 break; |
| 4471 default: |
| 4472 gold_unreachable(); |
| 4473 } |
| 4474 |
| 4475 return true; |
| 4476 } |
| 4477 |
| 4478 // Get the Reference_flags for a particular relocation. |
| 4479 |
| 4480 template<int size, bool big_endian> |
| 4481 int |
| 4482 Target_mips<size, big_endian>::Scan::get_reference_flags( |
| 4483 unsigned int r_type) |
| 4484 { |
| 4485 switch (r_type) |
| 4486 { |
| 4487 case elfcpp::R_MIPS_NONE: |
| 4488 case elfcpp::R_MIPS_GNU_VTINHERIT: |
| 4489 case elfcpp::R_MIPS_GNU_VTENTRY: |
| 4490 case elfcpp::R_MIPS_INSERT_A: |
| 4491 case elfcpp::R_MIPS_INSERT_B: |
| 4492 case elfcpp::R_MIPS_DELETE: |
| 4493 case elfcpp::R_MIPS_PJUMP: |
| 4494 case elfcpp::R_MIPS_RELGOT: |
| 4495 case elfcpp::R_MIPS_REL16: |
| 4496 case elfcpp::R_MIPS_ADD_IMMEDIATE: |
| 4497 // No symbol reference. |
| 4498 return 0; |
| 4499 |
| 4500 case elfcpp::R_MIPS_16: |
| 4501 case elfcpp::R_MIPS_32: |
| 4502 case elfcpp::R_MIPS_64: |
| 4503 case elfcpp::R_MIPS_HI16: |
| 4504 case elfcpp::R_MIPS_LO16: |
| 4505 case elfcpp::R_MIPS_SHIFT5: |
| 4506 case elfcpp::R_MIPS_SHIFT6: |
| 4507 case elfcpp::R_MIPS_SUB: |
| 4508 case elfcpp::R_MIPS_HIGHER: |
| 4509 case elfcpp::R_MIPS_HIGHEST: |
| 4510 case elfcpp::R_MIPS_SCN_DISP: |
| 4511 case elfcpp::R_MIPS16_HI16: |
| 4512 case elfcpp::R_MIPS16_LO16: |
| 4513 return Symbol::ABSOLUTE_REF; |
| 4514 |
| 4515 case elfcpp::R_MIPS_26: |
| 4516 case elfcpp::R_MIPS16_26: |
| 4517 case elfcpp::R_MIPS_GPREL32: |
| 4518 case elfcpp::R_MIPS_GPREL16: |
| 4519 case elfcpp::R_MIPS16_GPREL: |
| 4520 case elfcpp::R_MIPS_REL32: |
| 4521 return Symbol::RELATIVE_REF; |
| 4522 |
| 4523 case elfcpp::R_MIPS_PC16: |
| 4524 case elfcpp::R_MIPS_PC32: |
| 4525 case elfcpp::R_MIPS_GNU_REL16_S2: |
| 4526 case elfcpp::R_MIPS_JALR: |
| 4527 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
| 4528 |
| 4529 case elfcpp::R_MIPS_GOT16: |
| 4530 case elfcpp::R_MIPS16_GOT16: |
| 4531 case elfcpp::R_MIPS_CALL16: |
| 4532 case elfcpp::R_MIPS16_CALL16: |
| 4533 case elfcpp::R_MIPS_GOT_DISP: |
| 4534 case elfcpp::R_MIPS_GOT_HI16: |
| 4535 case elfcpp::R_MIPS_CALL_HI16: |
| 4536 case elfcpp::R_MIPS_GOT_LO16: |
| 4537 case elfcpp::R_MIPS_CALL_LO16: |
| 4538 case elfcpp::R_MIPS_LITERAL: |
| 4539 case elfcpp::R_MIPS_GOT_PAGE: |
| 4540 case elfcpp::R_MIPS_GOT_OFST: |
| 4541 // Absolute in GOT. |
| 4542 return Symbol::RELATIVE_REF; |
| 4543 |
| 4544 case elfcpp::R_MIPS_TLS_DTPMOD32: |
| 4545 case elfcpp::R_MIPS_TLS_DTPREL32: |
| 4546 case elfcpp::R_MIPS_TLS_DTPMOD64: |
| 4547 case elfcpp::R_MIPS_TLS_DTPREL64: |
| 4548 case elfcpp::R_MIPS_TLS_GD: |
| 4549 case elfcpp::R_MIPS_TLS_LDM: |
| 4550 case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
| 4551 case elfcpp::R_MIPS_TLS_DTPREL_LO16: |
| 4552 case elfcpp::R_MIPS_TLS_GOTTPREL: |
| 4553 case elfcpp::R_MIPS_TLS_TPREL32: |
| 4554 case elfcpp::R_MIPS_TLS_TPREL64: |
| 4555 case elfcpp::R_MIPS_TLS_TPREL_HI16: |
| 4556 case elfcpp::R_MIPS_TLS_TPREL_LO16: |
| 4557 return Symbol::TLS_REF; |
| 4558 |
| 4559 case elfcpp::R_MIPS_COPY: |
| 4560 case elfcpp::R_MIPS_UNUSED1: |
| 4561 case elfcpp::R_MIPS_UNUSED2: |
| 4562 case elfcpp::R_MIPS_UNUSED3: |
| 4563 case elfcpp::R_MIPS_GLOB_DAT: |
| 4564 case elfcpp::R_MIPS_JUMP_SLOT: |
| 4565 default: |
| 4566 // Not expected. We will give an error later. |
| 4567 return 0; |
| 4568 } |
| 4569 } |
| 4570 |
| 4571 // Report an unsupported relocation against a local symbol. |
| 4572 |
| 4573 template<int size, bool big_endian> |
| 4574 void |
| 4575 Target_mips<size, big_endian>::Scan::unsupported_reloc_local( |
| 4576 Sized_relobj_file<size, big_endian>* object, |
| 4577 unsigned int r_type) |
| 4578 { |
| 4579 gold_error(_("%s: unsupported reloc %u against local symbol"), |
| 4580 object->name().c_str(), r_type); |
| 4581 } |
| 4582 |
| 4583 // Report an unsupported relocation against a global symbol. |
| 4584 |
| 4585 template<int size, bool big_endian> |
| 4586 void |
| 4587 Target_mips<size, big_endian>::Scan::unsupported_reloc_global( |
| 4588 Sized_relobj_file<size, big_endian>* object, |
| 4589 unsigned int r_type, |
| 4590 Symbol* gsym) |
| 4591 { |
| 4592 gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
| 4593 object->name().c_str(), r_type, gsym->demangled_name().c_str()); |
| 4594 } |
| 4595 |
| 4596 template<int size, bool big_endian> |
| 4597 Target::Target_info Target_mips<size, big_endian>::mips_info = |
| 4598 { |
| 4599 size, // size |
| 4600 big_endian, // is_big_endian |
| 4601 elfcpp::EM_MIPS, // machine_code |
| 4602 false, // has_make_symbol |
| 4603 false, // has_resolve |
| 4604 false, // has_code_fill |
| 4605 true, // is_default_stack_executable |
| 4606 false, // can_icf_inline_merge_sections |
| 4607 '\0', // wrap_char |
| 4608 "/lib/ld.so.1", // dynamic_linker |
| 4609 0x400000, // default_text_segment_address |
| 4610 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 4611 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
| 4612 elfcpp::SHN_UNDEF, // small_common_shndx |
| 4613 elfcpp::SHN_UNDEF, // large_common_shndx |
| 4614 0, // small_common_section_flags |
| 4615 0, // large_common_section_flags |
| 4616 NULL, // attributes_section |
| 4617 NULL // attributes_vendor |
| 4618 }; |
| 4619 |
| 4620 // Adjust ELF file header. |
| 4621 |
| 4622 template<int size, bool big_endian> |
| 4623 void |
| 4624 Target_mips<size, big_endian>::do_adjust_elf_header( |
| 4625 unsigned char* view, |
| 4626 int len) const |
| 4627 { |
| 4628 gold_assert(len == elfcpp::Elf_sizes<size>::ehdr_size); |
| 4629 |
| 4630 elfcpp::Ehdr<size, big_endian> ehdr(view); |
| 4631 unsigned char e_ident[elfcpp::EI_NIDENT]; |
| 4632 memcpy(e_ident, ehdr.get_e_ident(), elfcpp::EI_NIDENT); |
| 4633 |
| 4634 e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; |
| 4635 e_ident[elfcpp::EI_ABIVERSION] = elfcpp::EV_NONE; |
| 4636 |
| 4637 elfcpp::Ehdr_write<size, big_endian> oehdr(view); |
| 4638 oehdr.put_e_ident(e_ident); |
| 4639 oehdr.put_e_flags(this->processor_specific_flags_); |
| 4640 } |
| 4641 |
| 4642 // The selector for mips object files. |
| 4643 |
| 4644 template<int size, bool big_endian> |
| 4645 class Target_selector_mips : public Target_selector |
| 4646 { |
| 4647 public: |
| 4648 Target_selector_mips() |
| 4649 : Target_selector(elfcpp::EM_MIPS, size, big_endian, |
| 4650 (size == 64 ? |
| 4651 (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") : |
| 4652 (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips")), |
| 4653 (size == 64 ? |
| 4654 (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") : |
| 4655 (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips"))) |
| 4656 { } |
| 4657 |
| 4658 Target* do_instantiate_target() |
| 4659 { return new Target_mips<size, big_endian>(); } |
| 4660 }; |
| 4661 |
| 4662 Target_selector_mips<32, false> target_selector_mips32; |
| 4663 |
| 4664 |
| 4665 } // End anonymous namespace. |
OLD | NEW |