| 1 | // sparc.cc -- sparc target support for gold. |
| 2 | |
| 3 | // Copyright (C) 2008-2018 Free Software Foundation, Inc. |
| 4 | // Written by David S. Miller <davem@davemloft.net>. |
| 5 | |
| 6 | // This file is part of gold. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or modify |
| 9 | // it under the terms of the GNU General Public License as published by |
| 10 | // the Free Software Foundation; either version 3 of the License, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | #include "gold.h" |
| 24 | |
| 25 | #include <cstdlib> |
| 26 | #include <cstdio> |
| 27 | #include <cstring> |
| 28 | |
| 29 | #include "elfcpp.h" |
| 30 | #include "parameters.h" |
| 31 | #include "reloc.h" |
| 32 | #include "sparc.h" |
| 33 | #include "object.h" |
| 34 | #include "symtab.h" |
| 35 | #include "layout.h" |
| 36 | #include "output.h" |
| 37 | #include "copy-relocs.h" |
| 38 | #include "target.h" |
| 39 | #include "target-reloc.h" |
| 40 | #include "target-select.h" |
| 41 | #include "tls.h" |
| 42 | #include "errors.h" |
| 43 | #include "gc.h" |
| 44 | |
| 45 | namespace |
| 46 | { |
| 47 | |
| 48 | using namespace gold; |
| 49 | |
| 50 | template<int size, bool big_endian> |
| 51 | class Output_data_plt_sparc; |
| 52 | |
| 53 | template<int size, bool big_endian> |
| 54 | class Target_sparc : public Sized_target<size, big_endian> |
| 55 | { |
| 56 | public: |
| 57 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; |
| 58 | |
| 59 | Target_sparc() |
| 60 | : Sized_target<size, big_endian>(&sparc_info), |
| 61 | got_(NULL), plt_(NULL), rela_dyn_(NULL), rela_ifunc_(NULL), |
| 62 | copy_relocs_(elfcpp::R_SPARC_COPY), |
| 63 | got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL), |
| 64 | elf_machine_(sparc_info.machine_code), elf_flags_(0), |
| 65 | elf_flags_set_(false), register_syms_() |
| 66 | { |
| 67 | } |
| 68 | |
| 69 | // Make a new symbol table entry. |
| 70 | Sized_symbol<size>* |
| 71 | make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t); |
| 72 | |
| 73 | // Process the relocations to determine unreferenced sections for |
| 74 | // garbage collection. |
| 75 | void |
| 76 | gc_process_relocs(Symbol_table* symtab, |
| 77 | Layout* layout, |
| 78 | Sized_relobj_file<size, big_endian>* object, |
| 79 | unsigned int data_shndx, |
| 80 | unsigned int sh_type, |
| 81 | const unsigned char* prelocs, |
| 82 | size_t reloc_count, |
| 83 | Output_section* output_section, |
| 84 | bool needs_special_offset_handling, |
| 85 | size_t local_symbol_count, |
| 86 | const unsigned char* plocal_symbols); |
| 87 | |
| 88 | // Scan the relocations to look for symbol adjustments. |
| 89 | void |
| 90 | scan_relocs(Symbol_table* symtab, |
| 91 | Layout* layout, |
| 92 | Sized_relobj_file<size, big_endian>* object, |
| 93 | unsigned int data_shndx, |
| 94 | unsigned int sh_type, |
| 95 | const unsigned char* prelocs, |
| 96 | size_t reloc_count, |
| 97 | Output_section* output_section, |
| 98 | bool needs_special_offset_handling, |
| 99 | size_t local_symbol_count, |
| 100 | const unsigned char* plocal_symbols); |
| 101 | // Finalize the sections. |
| 102 | void |
| 103 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
| 104 | |
| 105 | // Return the value to use for a dynamic which requires special |
| 106 | // treatment. |
| 107 | uint64_t |
| 108 | do_dynsym_value(const Symbol*) const; |
| 109 | |
| 110 | // Relocate a section. |
| 111 | void |
| 112 | relocate_section(const Relocate_info<size, big_endian>*, |
| 113 | unsigned int sh_type, |
| 114 | const unsigned char* prelocs, |
| 115 | size_t reloc_count, |
| 116 | Output_section* output_section, |
| 117 | bool needs_special_offset_handling, |
| 118 | unsigned char* view, |
| 119 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, |
| 120 | section_size_type view_size, |
| 121 | const Reloc_symbol_changes*); |
| 122 | |
| 123 | // Scan the relocs during a relocatable link. |
| 124 | void |
| 125 | scan_relocatable_relocs(Symbol_table* symtab, |
| 126 | Layout* layout, |
| 127 | Sized_relobj_file<size, big_endian>* object, |
| 128 | unsigned int data_shndx, |
| 129 | unsigned int sh_type, |
| 130 | const unsigned char* prelocs, |
| 131 | size_t reloc_count, |
| 132 | Output_section* output_section, |
| 133 | bool needs_special_offset_handling, |
| 134 | size_t local_symbol_count, |
| 135 | const unsigned char* plocal_symbols, |
| 136 | Relocatable_relocs*); |
| 137 | |
| 138 | // Scan the relocs for --emit-relocs. |
| 139 | void |
| 140 | emit_relocs_scan(Symbol_table* symtab, |
| 141 | Layout* layout, |
| 142 | Sized_relobj_file<size, big_endian>* object, |
| 143 | unsigned int data_shndx, |
| 144 | unsigned int sh_type, |
| 145 | const unsigned char* prelocs, |
| 146 | size_t reloc_count, |
| 147 | Output_section* output_section, |
| 148 | bool needs_special_offset_handling, |
| 149 | size_t local_symbol_count, |
| 150 | const unsigned char* plocal_syms, |
| 151 | Relocatable_relocs* rr); |
| 152 | |
| 153 | // Emit relocations for a section. |
| 154 | void |
| 155 | relocate_relocs(const Relocate_info<size, big_endian>*, |
| 156 | unsigned int sh_type, |
| 157 | const unsigned char* prelocs, |
| 158 | size_t reloc_count, |
| 159 | Output_section* output_section, |
| 160 | typename elfcpp::Elf_types<size>::Elf_Off |
| 161 | offset_in_output_section, |
| 162 | unsigned char* view, |
| 163 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, |
| 164 | section_size_type view_size, |
| 165 | unsigned char* reloc_view, |
| 166 | section_size_type reloc_view_size); |
| 167 | |
| 168 | // Return whether SYM is defined by the ABI. |
| 169 | bool |
| 170 | do_is_defined_by_abi(const Symbol* sym) const |
| 171 | { return strcmp(sym->name(), "___tls_get_addr") == 0; } |
| 172 | |
| 173 | // Return the PLT address to use for a global symbol. |
| 174 | uint64_t |
| 175 | do_plt_address_for_global(const Symbol* gsym) const |
| 176 | { return this->plt_section()->address_for_global(gsym); } |
| 177 | |
| 178 | uint64_t |
| 179 | do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const |
| 180 | { return this->plt_section()->address_for_local(relobj, symndx); } |
| 181 | |
| 182 | // Return whether there is a GOT section. |
| 183 | bool |
| 184 | has_got_section() const |
| 185 | { return this->got_ != NULL; } |
| 186 | |
| 187 | // Return the size of the GOT section. |
| 188 | section_size_type |
| 189 | got_size() const |
| 190 | { |
| 191 | gold_assert(this->got_ != NULL); |
| 192 | return this->got_->data_size(); |
| 193 | } |
| 194 | |
| 195 | // Return the number of entries in the GOT. |
| 196 | unsigned int |
| 197 | got_entry_count() const |
| 198 | { |
| 199 | if (this->got_ == NULL) |
| 200 | return 0; |
| 201 | return this->got_size() / (size / 8); |
| 202 | } |
| 203 | |
| 204 | // Return the address of the GOT. |
| 205 | uint64_t |
| 206 | got_address() const |
| 207 | { |
| 208 | if (this->got_ == NULL) |
| 209 | return 0; |
| 210 | return this->got_->address(); |
| 211 | } |
| 212 | |
| 213 | // Return the number of entries in the PLT. |
| 214 | unsigned int |
| 215 | plt_entry_count() const; |
| 216 | |
| 217 | // Return the offset of the first non-reserved PLT entry. |
| 218 | unsigned int |
| 219 | first_plt_entry_offset() const; |
| 220 | |
| 221 | // Return the size of each PLT entry. |
| 222 | unsigned int |
| 223 | plt_entry_size() const; |
| 224 | |
| 225 | protected: |
| 226 | // Make an ELF object. |
| 227 | Object* |
| 228 | do_make_elf_object(const std::string&, Input_file*, off_t, |
| 229 | const elfcpp::Ehdr<size, big_endian>& ehdr); |
| 230 | |
| 231 | void |
| 232 | do_adjust_elf_header(unsigned char* view, int len); |
| 233 | |
| 234 | private: |
| 235 | |
| 236 | // The class which scans relocations. |
| 237 | class Scan |
| 238 | { |
| 239 | public: |
| 240 | Scan() |
| 241 | : issued_non_pic_error_(false) |
| 242 | { } |
| 243 | |
| 244 | static inline int |
| 245 | get_reference_flags(unsigned int r_type); |
| 246 | |
| 247 | inline void |
| 248 | local(Symbol_table* symtab, Layout* layout, Target_sparc* target, |
| 249 | Sized_relobj_file<size, big_endian>* object, |
| 250 | unsigned int data_shndx, |
| 251 | Output_section* output_section, |
| 252 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, |
| 253 | const elfcpp::Sym<size, big_endian>& lsym, |
| 254 | bool is_discarded); |
| 255 | |
| 256 | inline void |
| 257 | global(Symbol_table* symtab, Layout* layout, Target_sparc* target, |
| 258 | Sized_relobj_file<size, big_endian>* object, |
| 259 | unsigned int data_shndx, |
| 260 | Output_section* output_section, |
| 261 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, |
| 262 | Symbol* gsym); |
| 263 | |
| 264 | inline bool |
| 265 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 266 | Target_sparc* , |
| 267 | Sized_relobj_file<size, big_endian>* , |
| 268 | unsigned int , |
| 269 | Output_section* , |
| 270 | const elfcpp::Rela<size, big_endian>& , |
| 271 | unsigned int , |
| 272 | const elfcpp::Sym<size, big_endian>&) |
| 273 | { return false; } |
| 274 | |
| 275 | inline bool |
| 276 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 277 | Target_sparc* , |
| 278 | Sized_relobj_file<size, big_endian>* , |
| 279 | unsigned int , |
| 280 | Output_section* , |
| 281 | const elfcpp::Rela<size, |
| 282 | big_endian>& , |
| 283 | unsigned int , Symbol*) |
| 284 | { return false; } |
| 285 | |
| 286 | |
| 287 | private: |
| 288 | static void |
| 289 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
| 290 | unsigned int r_type); |
| 291 | |
| 292 | static void |
| 293 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
| 294 | unsigned int r_type, Symbol*); |
| 295 | |
| 296 | static void |
| 297 | generate_tls_call(Symbol_table* symtab, Layout* layout, |
| 298 | Target_sparc* target); |
| 299 | |
| 300 | void |
| 301 | check_non_pic(Relobj*, unsigned int r_type); |
| 302 | |
| 303 | bool |
| 304 | reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>*, |
| 305 | unsigned int r_type); |
| 306 | |
| 307 | // Whether we have issued an error about a non-PIC compilation. |
| 308 | bool issued_non_pic_error_; |
| 309 | }; |
| 310 | |
| 311 | // The class which implements relocation. |
| 312 | class Relocate |
| 313 | { |
| 314 | public: |
| 315 | Relocate() |
| 316 | : ignore_gd_add_(false), reloc_adjust_addr_(NULL) |
| 317 | { } |
| 318 | |
| 319 | ~Relocate() |
| 320 | { |
| 321 | if (this->ignore_gd_add_) |
| 322 | { |
| 323 | // FIXME: This needs to specify the location somehow. |
| 324 | gold_error(_("missing expected TLS relocation")); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | // Do a relocation. Return false if the caller should not issue |
| 329 | // any warnings about this relocation. |
| 330 | inline bool |
| 331 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
| 332 | Target_sparc*, Output_section*, size_t, const unsigned char*, |
| 333 | const Sized_symbol<size>*, const Symbol_value<size>*, |
| 334 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, |
| 335 | section_size_type); |
| 336 | |
| 337 | private: |
| 338 | // Do a TLS relocation. |
| 339 | inline void |
| 340 | relocate_tls(const Relocate_info<size, big_endian>*, Target_sparc* target, |
| 341 | size_t relnum, const elfcpp::Rela<size, big_endian>&, |
| 342 | unsigned int r_type, const Sized_symbol<size>*, |
| 343 | const Symbol_value<size>*, |
| 344 | unsigned char*, |
| 345 | typename elfcpp::Elf_types<size>::Elf_Addr, |
| 346 | section_size_type); |
| 347 | |
| 348 | inline void |
| 349 | relax_call(Target_sparc<size, big_endian>* target, |
| 350 | unsigned char* view, |
| 351 | const elfcpp::Rela<size, big_endian>& rela, |
| 352 | section_size_type view_size); |
| 353 | |
| 354 | // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD |
| 355 | bool ignore_gd_add_; |
| 356 | |
| 357 | // If we hit a reloc at this view address, adjust it back by 4 bytes. |
| 358 | unsigned char *reloc_adjust_addr_; |
| 359 | }; |
| 360 | |
| 361 | // Get the GOT section, creating it if necessary. |
| 362 | Output_data_got<size, big_endian>* |
| 363 | got_section(Symbol_table*, Layout*); |
| 364 | |
| 365 | // Create the PLT section. |
| 366 | void |
| 367 | make_plt_section(Symbol_table* symtab, Layout* layout); |
| 368 | |
| 369 | // Create a PLT entry for a global symbol. |
| 370 | void |
| 371 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
| 372 | |
| 373 | // Create a PLT entry for a local STT_GNU_IFUNC symbol. |
| 374 | void |
| 375 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
| 376 | Sized_relobj_file<size, big_endian>* relobj, |
| 377 | unsigned int local_sym_index); |
| 378 | |
| 379 | // Create a GOT entry for the TLS module index. |
| 380 | unsigned int |
| 381 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, |
| 382 | Sized_relobj_file<size, big_endian>* object); |
| 383 | |
| 384 | // Return the gsym for "__tls_get_addr". Cache if not already |
| 385 | // cached. |
| 386 | Symbol* |
| 387 | tls_get_addr_sym(Symbol_table* symtab) |
| 388 | { |
| 389 | if (!this->tls_get_addr_sym_) |
| 390 | this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL); |
| 391 | gold_assert(this->tls_get_addr_sym_); |
| 392 | return this->tls_get_addr_sym_; |
| 393 | } |
| 394 | |
| 395 | // Get the PLT section. |
| 396 | Output_data_plt_sparc<size, big_endian>* |
| 397 | plt_section() const |
| 398 | { |
| 399 | gold_assert(this->plt_ != NULL); |
| 400 | return this->plt_; |
| 401 | } |
| 402 | |
| 403 | // Get the dynamic reloc section, creating it if necessary. |
| 404 | Reloc_section* |
| 405 | rela_dyn_section(Layout*); |
| 406 | |
| 407 | // Get the section to use for IFUNC relocations. |
| 408 | Reloc_section* |
| 409 | rela_ifunc_section(Layout*); |
| 410 | |
| 411 | // Copy a relocation against a global symbol. |
| 412 | void |
| 413 | copy_reloc(Symbol_table* symtab, Layout* layout, |
| 414 | Sized_relobj_file<size, big_endian>* object, |
| 415 | unsigned int shndx, Output_section* output_section, |
| 416 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) |
| 417 | { |
| 418 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
| 419 | this->copy_relocs_.copy_reloc(symtab, layout, |
| 420 | symtab->get_sized_symbol<size>(sym), |
| 421 | object, shndx, output_section, |
| 422 | r_type, reloc.get_r_offset(), |
| 423 | reloc.get_r_addend(), |
| 424 | this->rela_dyn_section(layout)); |
| 425 | } |
| 426 | |
| 427 | // Information about this specific target which we pass to the |
| 428 | // general Target structure. |
| 429 | static Target::Target_info sparc_info; |
| 430 | |
| 431 | // The types of GOT entries needed for this platform. |
| 432 | // These values are exposed to the ABI in an incremental link. |
| 433 | // Do not renumber existing values without changing the version |
| 434 | // number of the .gnu_incremental_inputs section. |
| 435 | enum Got_type |
| 436 | { |
| 437 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol |
| 438 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset |
| 439 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair |
| 440 | }; |
| 441 | |
| 442 | struct Register_symbol |
| 443 | { |
| 444 | Register_symbol() |
| 445 | : name(NULL), shndx(0), obj(NULL) |
| 446 | { } |
| 447 | const char* name; |
| 448 | unsigned int shndx; |
| 449 | Object* obj; |
| 450 | }; |
| 451 | |
| 452 | // The GOT section. |
| 453 | Output_data_got<size, big_endian>* got_; |
| 454 | // The PLT section. |
| 455 | Output_data_plt_sparc<size, big_endian>* plt_; |
| 456 | // The dynamic reloc section. |
| 457 | Reloc_section* rela_dyn_; |
| 458 | // The section to use for IFUNC relocs. |
| 459 | Reloc_section* rela_ifunc_; |
| 460 | // Relocs saved to avoid a COPY reloc. |
| 461 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
| 462 | // Offset of the GOT entry for the TLS module index; |
| 463 | unsigned int got_mod_index_offset_; |
| 464 | // Cached pointer to __tls_get_addr symbol |
| 465 | Symbol* tls_get_addr_sym_; |
| 466 | // Accumulated elf machine type |
| 467 | elfcpp::Elf_Half elf_machine_; |
| 468 | // Accumulated elf header flags |
| 469 | elfcpp::Elf_Word elf_flags_; |
| 470 | // Whether elf_flags_ has been set for the first time yet |
| 471 | bool elf_flags_set_; |
| 472 | // STT_SPARC_REGISTER symbols (%g2, %g3, %g6, %g7). |
| 473 | Register_symbol register_syms_[4]; |
| 474 | }; |
| 475 | |
| 476 | template<> |
| 477 | Target::Target_info Target_sparc<32, true>::sparc_info = |
| 478 | { |
| 479 | 32, // size |
| 480 | true, // is_big_endian |
| 481 | elfcpp::EM_SPARC, // machine_code |
| 482 | false, // has_make_symbol |
| 483 | false, // has_resolve |
| 484 | false, // has_code_fill |
| 485 | true, // is_default_stack_executable |
| 486 | false, // can_icf_inline_merge_sections |
| 487 | '\0', // wrap_char |
| 488 | "/usr/lib/ld.so.1", // dynamic_linker |
| 489 | 0x00010000, // default_text_segment_address |
| 490 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 491 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
| 492 | false, // isolate_execinstr |
| 493 | 0, // rosegment_gap |
| 494 | elfcpp::SHN_UNDEF, // small_common_shndx |
| 495 | elfcpp::SHN_UNDEF, // large_common_shndx |
| 496 | 0, // small_common_section_flags |
| 497 | 0, // large_common_section_flags |
| 498 | NULL, // attributes_section |
| 499 | NULL, // attributes_vendor |
| 500 | "_start", // entry_symbol_name |
| 501 | 32, // hash_entry_size |
| 502 | }; |
| 503 | |
| 504 | template<> |
| 505 | Target::Target_info Target_sparc<64, true>::sparc_info = |
| 506 | { |
| 507 | 64, // size |
| 508 | true, // is_big_endian |
| 509 | elfcpp::EM_SPARCV9, // machine_code |
| 510 | true, // has_make_symbol |
| 511 | false, // has_resolve |
| 512 | false, // has_code_fill |
| 513 | true, // is_default_stack_executable |
| 514 | false, // can_icf_inline_merge_sections |
| 515 | '\0', // wrap_char |
| 516 | "/usr/lib/sparcv9/ld.so.1", // dynamic_linker |
| 517 | 0x100000, // default_text_segment_address |
| 518 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 519 | 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
| 520 | false, // isolate_execinstr |
| 521 | 0, // rosegment_gap |
| 522 | elfcpp::SHN_UNDEF, // small_common_shndx |
| 523 | elfcpp::SHN_UNDEF, // large_common_shndx |
| 524 | 0, // small_common_section_flags |
| 525 | 0, // large_common_section_flags |
| 526 | NULL, // attributes_section |
| 527 | NULL, // attributes_vendor |
| 528 | "_start", // entry_symbol_name |
| 529 | 32, // hash_entry_size |
| 530 | }; |
| 531 | |
| 532 | // We have to take care here, even when operating in little-endian |
| 533 | // mode, sparc instructions are still big endian. |
| 534 | template<int size, bool big_endian> |
| 535 | class Sparc_relocate_functions |
| 536 | { |
| 537 | private: |
| 538 | // Do a simple relocation with the addend in the relocation. |
| 539 | template<int valsize> |
| 540 | static inline void |
| 541 | rela(unsigned char* view, |
| 542 | unsigned int right_shift, |
| 543 | typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, |
| 544 | typename elfcpp::Swap<size, big_endian>::Valtype value, |
| 545 | typename elfcpp::Swap<size, big_endian>::Valtype addend) |
| 546 | { |
| 547 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
| 548 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 549 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); |
| 550 | Valtype reloc = ((value + addend) >> right_shift); |
| 551 | |
| 552 | val &= ~dst_mask; |
| 553 | reloc &= dst_mask; |
| 554 | |
| 555 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
| 556 | } |
| 557 | |
| 558 | // Do a simple relocation using a symbol value with the addend in |
| 559 | // the relocation. |
| 560 | template<int valsize> |
| 561 | static inline void |
| 562 | rela(unsigned char* view, |
| 563 | unsigned int right_shift, |
| 564 | typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, |
| 565 | const Sized_relobj_file<size, big_endian>* object, |
| 566 | const Symbol_value<size>* psymval, |
| 567 | typename elfcpp::Swap<valsize, big_endian>::Valtype addend) |
| 568 | { |
| 569 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
| 570 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 571 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); |
| 572 | Valtype reloc = (psymval->value(object, addend) >> right_shift); |
| 573 | |
| 574 | val &= ~dst_mask; |
| 575 | reloc &= dst_mask; |
| 576 | |
| 577 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
| 578 | } |
| 579 | |
| 580 | // Do a simple relocation using a symbol value with the addend in |
| 581 | // the relocation, unaligned. |
| 582 | template<int valsize> |
| 583 | static inline void |
| 584 | rela_ua(unsigned char* view, |
| 585 | unsigned int right_shift, elfcpp::Elf_Xword dst_mask, |
| 586 | const Sized_relobj_file<size, big_endian>* object, |
| 587 | const Symbol_value<size>* psymval, |
| 588 | typename elfcpp::Swap<size, big_endian>::Valtype addend) |
| 589 | { |
| 590 | typedef typename elfcpp::Swap_unaligned<valsize, |
| 591 | big_endian>::Valtype Valtype; |
| 592 | unsigned char* wv = view; |
| 593 | Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); |
| 594 | Valtype reloc = (psymval->value(object, addend) >> right_shift); |
| 595 | |
| 596 | val &= ~dst_mask; |
| 597 | reloc &= dst_mask; |
| 598 | |
| 599 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); |
| 600 | } |
| 601 | |
| 602 | // Do a simple PC relative relocation with a Symbol_value with the |
| 603 | // addend in the relocation. |
| 604 | template<int valsize> |
| 605 | static inline void |
| 606 | pcrela(unsigned char* view, |
| 607 | unsigned int right_shift, |
| 608 | typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, |
| 609 | const Sized_relobj_file<size, big_endian>* object, |
| 610 | const Symbol_value<size>* psymval, |
| 611 | typename elfcpp::Swap<size, big_endian>::Valtype addend, |
| 612 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 613 | { |
| 614 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
| 615 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 616 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); |
| 617 | Valtype reloc = ((psymval->value(object, addend) - address) |
| 618 | >> right_shift); |
| 619 | |
| 620 | val &= ~dst_mask; |
| 621 | reloc &= dst_mask; |
| 622 | |
| 623 | elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
| 624 | } |
| 625 | |
| 626 | template<int valsize> |
| 627 | static inline void |
| 628 | pcrela_unaligned(unsigned char* view, |
| 629 | const Sized_relobj_file<size, big_endian>* object, |
| 630 | const Symbol_value<size>* psymval, |
| 631 | typename elfcpp::Swap<size, big_endian>::Valtype addend, |
| 632 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 633 | { |
| 634 | typedef typename elfcpp::Swap_unaligned<valsize, |
| 635 | big_endian>::Valtype Valtype; |
| 636 | unsigned char* wv = view; |
| 637 | Valtype reloc = (psymval->value(object, addend) - address); |
| 638 | |
| 639 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); |
| 640 | } |
| 641 | |
| 642 | typedef Sparc_relocate_functions<size, big_endian> This; |
| 643 | typedef Sparc_relocate_functions<size, true> This_insn; |
| 644 | |
| 645 | public: |
| 646 | // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2 |
| 647 | static inline void |
| 648 | wdisp30(unsigned char* view, |
| 649 | const Sized_relobj_file<size, big_endian>* object, |
| 650 | const Symbol_value<size>* psymval, |
| 651 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 652 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 653 | { |
| 654 | This_insn::template pcrela<32>(view, 2, 0x3fffffff, object, |
| 655 | psymval, addend, address); |
| 656 | } |
| 657 | |
| 658 | // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2 |
| 659 | static inline void |
| 660 | wdisp22(unsigned char* view, |
| 661 | const Sized_relobj_file<size, big_endian>* object, |
| 662 | const Symbol_value<size>* psymval, |
| 663 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 664 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 665 | { |
| 666 | This_insn::template pcrela<32>(view, 2, 0x003fffff, object, |
| 667 | psymval, addend, address); |
| 668 | } |
| 669 | |
| 670 | // R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2 |
| 671 | static inline void |
| 672 | wdisp19(unsigned char* view, |
| 673 | const Sized_relobj_file<size, big_endian>* object, |
| 674 | const Symbol_value<size>* psymval, |
| 675 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 676 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 677 | { |
| 678 | This_insn::template pcrela<32>(view, 2, 0x0007ffff, object, |
| 679 | psymval, addend, address); |
| 680 | } |
| 681 | |
| 682 | // R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2 |
| 683 | static inline void |
| 684 | wdisp16(unsigned char* view, |
| 685 | const Sized_relobj_file<size, big_endian>* object, |
| 686 | const Symbol_value<size>* psymval, |
| 687 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 688 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 689 | { |
| 690 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 691 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 692 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 693 | Valtype reloc = ((psymval->value(object, addend) - address) |
| 694 | >> 2); |
| 695 | |
| 696 | // The relocation value is split between the low 14 bits, |
| 697 | // and bits 20-21. |
| 698 | val &= ~((0x3 << 20) | 0x3fff); |
| 699 | reloc = (((reloc & 0xc000) << (20 - 14)) |
| 700 | | (reloc & 0x3ffff)); |
| 701 | |
| 702 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 703 | } |
| 704 | |
| 705 | // R_SPARC_WDISP10: (Symbol + Addend - Address) >> 2 |
| 706 | static inline void |
| 707 | wdisp10(unsigned char* view, |
| 708 | const Sized_relobj_file<size, big_endian>* object, |
| 709 | const Symbol_value<size>* psymval, |
| 710 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 711 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 712 | { |
| 713 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 714 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 715 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 716 | Valtype reloc = ((psymval->value(object, addend) - address) |
| 717 | >> 2); |
| 718 | |
| 719 | // The relocation value is split between the low bits 5-12, |
| 720 | // and high bits 19-20. |
| 721 | val &= ~((0x3 << 19) | (0xff << 5)); |
| 722 | reloc = (((reloc & 0x300) << (19 - 8)) |
| 723 | | ((reloc & 0xff) << (5 - 0))); |
| 724 | |
| 725 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 726 | } |
| 727 | |
| 728 | // R_SPARC_PC22: (Symbol + Addend - Address) >> 10 |
| 729 | static inline void |
| 730 | pc22(unsigned char* view, |
| 731 | const Sized_relobj_file<size, big_endian>* object, |
| 732 | const Symbol_value<size>* psymval, |
| 733 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 734 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 735 | { |
| 736 | This_insn::template pcrela<32>(view, 10, 0x003fffff, object, |
| 737 | psymval, addend, address); |
| 738 | } |
| 739 | |
| 740 | // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff |
| 741 | static inline void |
| 742 | pc10(unsigned char* view, |
| 743 | const Sized_relobj_file<size, big_endian>* object, |
| 744 | const Symbol_value<size>* psymval, |
| 745 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 746 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 747 | { |
| 748 | This_insn::template pcrela<32>(view, 0, 0x000003ff, object, |
| 749 | psymval, addend, address); |
| 750 | } |
| 751 | |
| 752 | // R_SPARC_HI22: (Symbol + Addend) >> 10 |
| 753 | static inline void |
| 754 | hi22(unsigned char* view, |
| 755 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 756 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 757 | { |
| 758 | This_insn::template rela<32>(view, 10, 0x003fffff, value, addend); |
| 759 | } |
| 760 | |
| 761 | // R_SPARC_HI22: (Symbol + Addend) >> 10 |
| 762 | static inline void |
| 763 | hi22(unsigned char* view, |
| 764 | const Sized_relobj_file<size, big_endian>* object, |
| 765 | const Symbol_value<size>* psymval, |
| 766 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 767 | { |
| 768 | This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend); |
| 769 | } |
| 770 | |
| 771 | // R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10 |
| 772 | static inline void |
| 773 | pcplt22(unsigned char* view, |
| 774 | const Sized_relobj_file<size, big_endian>* object, |
| 775 | const Symbol_value<size>* psymval, |
| 776 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 777 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 778 | { |
| 779 | This_insn::template pcrela<32>(view, 10, 0x003fffff, object, |
| 780 | psymval, addend, address); |
| 781 | } |
| 782 | |
| 783 | // R_SPARC_LO10: (Symbol + Addend) & 0x3ff |
| 784 | static inline void |
| 785 | lo10(unsigned char* view, |
| 786 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 787 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 788 | { |
| 789 | This_insn::template rela<32>(view, 0, 0x000003ff, value, addend); |
| 790 | } |
| 791 | |
| 792 | // R_SPARC_LO10: (Symbol + Addend) & 0x3ff |
| 793 | static inline void |
| 794 | lo10(unsigned char* view, |
| 795 | const Sized_relobj_file<size, big_endian>* object, |
| 796 | const Symbol_value<size>* psymval, |
| 797 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 798 | { |
| 799 | This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend); |
| 800 | } |
| 801 | |
| 802 | // R_SPARC_LO10: (Symbol + Addend) & 0x3ff |
| 803 | static inline void |
| 804 | lo10(unsigned char* view, |
| 805 | const Sized_relobj_file<size, big_endian>* object, |
| 806 | const Symbol_value<size>* psymval, |
| 807 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 808 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 809 | { |
| 810 | This_insn::template pcrela<32>(view, 0, 0x000003ff, object, |
| 811 | psymval, addend, address); |
| 812 | } |
| 813 | |
| 814 | // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2 |
| 815 | static inline void |
| 816 | olo10(unsigned char* view, |
| 817 | const Sized_relobj_file<size, big_endian>* object, |
| 818 | const Symbol_value<size>* psymval, |
| 819 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 820 | typename elfcpp::Elf_types<size>::Elf_Addr addend2) |
| 821 | { |
| 822 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 823 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 824 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 825 | Valtype reloc = psymval->value(object, addend); |
| 826 | |
| 827 | val &= ~0x1fff; |
| 828 | reloc &= 0x3ff; |
| 829 | reloc += addend2; |
| 830 | reloc &= 0x1fff; |
| 831 | |
| 832 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 833 | } |
| 834 | |
| 835 | // R_SPARC_22: (Symbol + Addend) |
| 836 | static inline void |
| 837 | rela32_22(unsigned char* view, |
| 838 | const Sized_relobj_file<size, big_endian>* object, |
| 839 | const Symbol_value<size>* psymval, |
| 840 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 841 | { |
| 842 | This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend); |
| 843 | } |
| 844 | |
| 845 | // R_SPARC_13: (Symbol + Addend) |
| 846 | static inline void |
| 847 | rela32_13(unsigned char* view, |
| 848 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 849 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 850 | { |
| 851 | This_insn::template rela<32>(view, 0, 0x00001fff, value, addend); |
| 852 | } |
| 853 | |
| 854 | // R_SPARC_13: (Symbol + Addend) |
| 855 | static inline void |
| 856 | rela32_13(unsigned char* view, |
| 857 | const Sized_relobj_file<size, big_endian>* object, |
| 858 | const Symbol_value<size>* psymval, |
| 859 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 860 | { |
| 861 | This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend); |
| 862 | } |
| 863 | |
| 864 | // R_SPARC_UA16: (Symbol + Addend) |
| 865 | static inline void |
| 866 | ua16(unsigned char* view, |
| 867 | const Sized_relobj_file<size, big_endian>* object, |
| 868 | const Symbol_value<size>* psymval, |
| 869 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 870 | { |
| 871 | This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend); |
| 872 | } |
| 873 | |
| 874 | // R_SPARC_UA32: (Symbol + Addend) |
| 875 | static inline void |
| 876 | ua32(unsigned char* view, |
| 877 | const Sized_relobj_file<size, big_endian>* object, |
| 878 | const Symbol_value<size>* psymval, |
| 879 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 880 | { |
| 881 | This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend); |
| 882 | } |
| 883 | |
| 884 | // R_SPARC_UA64: (Symbol + Addend) |
| 885 | static inline void |
| 886 | ua64(unsigned char* view, |
| 887 | const Sized_relobj_file<size, big_endian>* object, |
| 888 | const Symbol_value<size>* psymval, |
| 889 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 890 | { |
| 891 | This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0, |
| 892 | object, psymval, addend); |
| 893 | } |
| 894 | |
| 895 | // R_SPARC_DISP8: (Symbol + Addend - Address) |
| 896 | static inline void |
| 897 | disp8(unsigned char* view, |
| 898 | const Sized_relobj_file<size, big_endian>* object, |
| 899 | const Symbol_value<size>* psymval, |
| 900 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 901 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 902 | { |
| 903 | This::template pcrela_unaligned<8>(view, object, psymval, |
| 904 | addend, address); |
| 905 | } |
| 906 | |
| 907 | // R_SPARC_DISP16: (Symbol + Addend - Address) |
| 908 | static inline void |
| 909 | disp16(unsigned char* view, |
| 910 | const Sized_relobj_file<size, big_endian>* object, |
| 911 | const Symbol_value<size>* psymval, |
| 912 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 913 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 914 | { |
| 915 | This::template pcrela_unaligned<16>(view, object, psymval, |
| 916 | addend, address); |
| 917 | } |
| 918 | |
| 919 | // R_SPARC_DISP32: (Symbol + Addend - Address) |
| 920 | static inline void |
| 921 | disp32(unsigned char* view, |
| 922 | const Sized_relobj_file<size, big_endian>* object, |
| 923 | const Symbol_value<size>* psymval, |
| 924 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 925 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 926 | { |
| 927 | This::template pcrela_unaligned<32>(view, object, psymval, |
| 928 | addend, address); |
| 929 | } |
| 930 | |
| 931 | // R_SPARC_DISP64: (Symbol + Addend - Address) |
| 932 | static inline void |
| 933 | disp64(unsigned char* view, |
| 934 | const Sized_relobj_file<size, big_endian>* object, |
| 935 | const Symbol_value<size>* psymval, |
| 936 | elfcpp::Elf_Xword addend, |
| 937 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 938 | { |
| 939 | This::template pcrela_unaligned<64>(view, object, psymval, |
| 940 | addend, address); |
| 941 | } |
| 942 | |
| 943 | // R_SPARC_H34: (Symbol + Addend) >> 12 |
| 944 | static inline void |
| 945 | h34(unsigned char* view, |
| 946 | const Sized_relobj_file<size, big_endian>* object, |
| 947 | const Symbol_value<size>* psymval, |
| 948 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 949 | { |
| 950 | This_insn::template rela<32>(view, 12, 0x003fffff, object, psymval, addend); |
| 951 | } |
| 952 | |
| 953 | // R_SPARC_H44: (Symbol + Addend) >> 22 |
| 954 | static inline void |
| 955 | h44(unsigned char* view, |
| 956 | const Sized_relobj_file<size, big_endian>* object, |
| 957 | const Symbol_value<size>* psymval, |
| 958 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 959 | { |
| 960 | This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend); |
| 961 | } |
| 962 | |
| 963 | // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff |
| 964 | static inline void |
| 965 | m44(unsigned char* view, |
| 966 | const Sized_relobj_file<size, big_endian>* object, |
| 967 | const Symbol_value<size>* psymval, |
| 968 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 969 | { |
| 970 | This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend); |
| 971 | } |
| 972 | |
| 973 | // R_SPARC_L44: (Symbol + Addend) & 0xfff |
| 974 | static inline void |
| 975 | l44(unsigned char* view, |
| 976 | const Sized_relobj_file<size, big_endian>* object, |
| 977 | const Symbol_value<size>* psymval, |
| 978 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 979 | { |
| 980 | This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend); |
| 981 | } |
| 982 | |
| 983 | // R_SPARC_HH22: (Symbol + Addend) >> 42 |
| 984 | static inline void |
| 985 | hh22(unsigned char* view, |
| 986 | const Sized_relobj_file<size, big_endian>* object, |
| 987 | const Symbol_value<size>* psymval, |
| 988 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 989 | { |
| 990 | This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend); |
| 991 | } |
| 992 | |
| 993 | // R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42 |
| 994 | static inline void |
| 995 | pc_hh22(unsigned char* view, |
| 996 | const Sized_relobj_file<size, big_endian>* object, |
| 997 | const Symbol_value<size>* psymval, |
| 998 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 999 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 1000 | { |
| 1001 | This_insn::template pcrela<32>(view, 42, 0x003fffff, object, |
| 1002 | psymval, addend, address); |
| 1003 | } |
| 1004 | |
| 1005 | // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff |
| 1006 | static inline void |
| 1007 | hm10(unsigned char* view, |
| 1008 | const Sized_relobj_file<size, big_endian>* object, |
| 1009 | const Symbol_value<size>* psymval, |
| 1010 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1011 | { |
| 1012 | This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend); |
| 1013 | } |
| 1014 | |
| 1015 | // R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff |
| 1016 | static inline void |
| 1017 | pc_hm10(unsigned char* view, |
| 1018 | const Sized_relobj_file<size, big_endian>* object, |
| 1019 | const Symbol_value<size>* psymval, |
| 1020 | typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| 1021 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
| 1022 | { |
| 1023 | This_insn::template pcrela<32>(view, 32, 0x000003ff, object, |
| 1024 | psymval, addend, address); |
| 1025 | } |
| 1026 | |
| 1027 | // R_SPARC_11: (Symbol + Addend) |
| 1028 | static inline void |
| 1029 | rela32_11(unsigned char* view, |
| 1030 | const Sized_relobj_file<size, big_endian>* object, |
| 1031 | const Symbol_value<size>* psymval, |
| 1032 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1033 | { |
| 1034 | This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend); |
| 1035 | } |
| 1036 | |
| 1037 | // R_SPARC_10: (Symbol + Addend) |
| 1038 | static inline void |
| 1039 | rela32_10(unsigned char* view, |
| 1040 | const Sized_relobj_file<size, big_endian>* object, |
| 1041 | const Symbol_value<size>* psymval, |
| 1042 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1043 | { |
| 1044 | This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend); |
| 1045 | } |
| 1046 | |
| 1047 | // R_SPARC_7: (Symbol + Addend) |
| 1048 | static inline void |
| 1049 | rela32_7(unsigned char* view, |
| 1050 | const Sized_relobj_file<size, big_endian>* object, |
| 1051 | const Symbol_value<size>* psymval, |
| 1052 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1053 | { |
| 1054 | This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend); |
| 1055 | } |
| 1056 | |
| 1057 | // R_SPARC_6: (Symbol + Addend) |
| 1058 | static inline void |
| 1059 | rela32_6(unsigned char* view, |
| 1060 | const Sized_relobj_file<size, big_endian>* object, |
| 1061 | const Symbol_value<size>* psymval, |
| 1062 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1063 | { |
| 1064 | This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend); |
| 1065 | } |
| 1066 | |
| 1067 | // R_SPARC_5: (Symbol + Addend) |
| 1068 | static inline void |
| 1069 | rela32_5(unsigned char* view, |
| 1070 | const Sized_relobj_file<size, big_endian>* object, |
| 1071 | const Symbol_value<size>* psymval, |
| 1072 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1073 | { |
| 1074 | This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend); |
| 1075 | } |
| 1076 | |
| 1077 | // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10 |
| 1078 | static inline void |
| 1079 | ldo_hix22(unsigned char* view, |
| 1080 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 1081 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1082 | { |
| 1083 | This_insn::hi22(view, value, addend); |
| 1084 | } |
| 1085 | |
| 1086 | // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff |
| 1087 | static inline void |
| 1088 | ldo_lox10(unsigned char* view, |
| 1089 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 1090 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1091 | { |
| 1092 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 1093 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1094 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 1095 | Valtype reloc = (value + addend); |
| 1096 | |
| 1097 | val &= ~0x1fff; |
| 1098 | reloc &= 0x3ff; |
| 1099 | |
| 1100 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 1101 | } |
| 1102 | |
| 1103 | // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10 |
| 1104 | static inline void |
| 1105 | hix22(unsigned char* view, |
| 1106 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 1107 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1108 | { |
| 1109 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 1110 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1111 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 1112 | Valtype reloc = (value + addend); |
| 1113 | |
| 1114 | val &= ~0x3fffff; |
| 1115 | |
| 1116 | reloc ^= ~(Valtype)0; |
| 1117 | reloc >>= 10; |
| 1118 | |
| 1119 | reloc &= 0x3fffff; |
| 1120 | |
| 1121 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 1122 | } |
| 1123 | |
| 1124 | // R_SPARC_GOTDATA_OP_HIX22: @gdopoff(Symbol + Addend) >> 10 |
| 1125 | static inline void |
| 1126 | gdop_hix22(unsigned char* view, |
| 1127 | typename elfcpp::Elf_types<size>::Elf_Addr value) |
| 1128 | { |
| 1129 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 1130 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1131 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 1132 | int32_t reloc = static_cast<int32_t>(value); |
| 1133 | |
| 1134 | val &= ~0x3fffff; |
| 1135 | |
| 1136 | if (reloc < 0) |
| 1137 | reloc ^= ~static_cast<int32_t>(0); |
| 1138 | reloc >>= 10; |
| 1139 | |
| 1140 | reloc &= 0x3fffff; |
| 1141 | |
| 1142 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 1143 | } |
| 1144 | |
| 1145 | // R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10 |
| 1146 | static inline void |
| 1147 | hix22(unsigned char* view, |
| 1148 | const Sized_relobj_file<size, big_endian>* object, |
| 1149 | const Symbol_value<size>* psymval, |
| 1150 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1151 | { |
| 1152 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 1153 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1154 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 1155 | Valtype reloc = psymval->value(object, addend); |
| 1156 | |
| 1157 | val &= ~0x3fffff; |
| 1158 | |
| 1159 | reloc ^= ~(Valtype)0; |
| 1160 | reloc >>= 10; |
| 1161 | |
| 1162 | reloc &= 0x3fffff; |
| 1163 | |
| 1164 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 1165 | } |
| 1166 | |
| 1167 | |
| 1168 | // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00 |
| 1169 | static inline void |
| 1170 | lox10(unsigned char* view, |
| 1171 | typename elfcpp::Elf_types<size>::Elf_Addr value, |
| 1172 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1173 | { |
| 1174 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 1175 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1176 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 1177 | Valtype reloc = (value + addend); |
| 1178 | |
| 1179 | val &= ~0x1fff; |
| 1180 | reloc &= 0x3ff; |
| 1181 | reloc |= 0x1c00; |
| 1182 | |
| 1183 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 1184 | } |
| 1185 | |
| 1186 | // R_SPARC_GOTDATA_OP_LOX10: (@gdopoff(Symbol + Addend) & 0x3ff) | 0x1c00 |
| 1187 | static inline void |
| 1188 | gdop_lox10(unsigned char* view, |
| 1189 | typename elfcpp::Elf_types<size>::Elf_Addr value) |
| 1190 | { |
| 1191 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 1192 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1193 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 1194 | int32_t reloc = static_cast<int32_t>(value); |
| 1195 | |
| 1196 | if (reloc < 0) |
| 1197 | reloc = (reloc & 0x3ff) | 0x1c00; |
| 1198 | else |
| 1199 | reloc = (reloc & 0x3ff); |
| 1200 | |
| 1201 | val &= ~0x1fff; |
| 1202 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 1203 | } |
| 1204 | |
| 1205 | // R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00 |
| 1206 | static inline void |
| 1207 | lox10(unsigned char* view, |
| 1208 | const Sized_relobj_file<size, big_endian>* object, |
| 1209 | const Symbol_value<size>* psymval, |
| 1210 | typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| 1211 | { |
| 1212 | typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| 1213 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1214 | Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| 1215 | Valtype reloc = psymval->value(object, addend); |
| 1216 | |
| 1217 | val &= ~0x1fff; |
| 1218 | reloc &= 0x3ff; |
| 1219 | reloc |= 0x1c00; |
| 1220 | |
| 1221 | elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| 1222 | } |
| 1223 | }; |
| 1224 | |
| 1225 | // Get the GOT section, creating it if necessary. |
| 1226 | |
| 1227 | template<int size, bool big_endian> |
| 1228 | Output_data_got<size, big_endian>* |
| 1229 | Target_sparc<size, big_endian>::got_section(Symbol_table* symtab, |
| 1230 | Layout* layout) |
| 1231 | { |
| 1232 | if (this->got_ == NULL) |
| 1233 | { |
| 1234 | gold_assert(symtab != NULL && layout != NULL); |
| 1235 | |
| 1236 | this->got_ = new Output_data_got<size, big_endian>(); |
| 1237 | |
| 1238 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, |
| 1239 | (elfcpp::SHF_ALLOC |
| 1240 | | elfcpp::SHF_WRITE), |
| 1241 | this->got_, ORDER_RELRO, true); |
| 1242 | |
| 1243 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. |
| 1244 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
| 1245 | Symbol_table::PREDEFINED, |
| 1246 | this->got_, |
| 1247 | 0, 0, elfcpp::STT_OBJECT, |
| 1248 | elfcpp::STB_LOCAL, |
| 1249 | elfcpp::STV_HIDDEN, 0, |
| 1250 | false, false); |
| 1251 | } |
| 1252 | |
| 1253 | return this->got_; |
| 1254 | } |
| 1255 | |
| 1256 | // Get the dynamic reloc section, creating it if necessary. |
| 1257 | |
| 1258 | template<int size, bool big_endian> |
| 1259 | typename Target_sparc<size, big_endian>::Reloc_section* |
| 1260 | Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout) |
| 1261 | { |
| 1262 | if (this->rela_dyn_ == NULL) |
| 1263 | { |
| 1264 | gold_assert(layout != NULL); |
| 1265 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); |
| 1266 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, |
| 1267 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
| 1268 | ORDER_DYNAMIC_RELOCS, false); |
| 1269 | } |
| 1270 | return this->rela_dyn_; |
| 1271 | } |
| 1272 | |
| 1273 | // Get the section to use for IFUNC relocs, creating it if |
| 1274 | // necessary. These go in .rela.dyn, but only after all other dynamic |
| 1275 | // relocations. They need to follow the other dynamic relocations so |
| 1276 | // that they can refer to global variables initialized by those |
| 1277 | // relocs. |
| 1278 | |
| 1279 | template<int size, bool big_endian> |
| 1280 | typename Target_sparc<size, big_endian>::Reloc_section* |
| 1281 | Target_sparc<size, big_endian>::rela_ifunc_section(Layout* layout) |
| 1282 | { |
| 1283 | if (this->rela_ifunc_ == NULL) |
| 1284 | { |
| 1285 | // Make sure we have already created the dynamic reloc section. |
| 1286 | this->rela_dyn_section(layout); |
| 1287 | this->rela_ifunc_ = new Reloc_section(false); |
| 1288 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, |
| 1289 | elfcpp::SHF_ALLOC, this->rela_ifunc_, |
| 1290 | ORDER_DYNAMIC_RELOCS, false); |
| 1291 | gold_assert(this->rela_dyn_->output_section() |
| 1292 | == this->rela_ifunc_->output_section()); |
| 1293 | } |
| 1294 | return this->rela_ifunc_; |
| 1295 | } |
| 1296 | |
| 1297 | // A class to handle the PLT data. |
| 1298 | |
| 1299 | template<int size, bool big_endian> |
| 1300 | class Output_data_plt_sparc : public Output_section_data |
| 1301 | { |
| 1302 | public: |
| 1303 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, |
| 1304 | size, big_endian> Reloc_section; |
| 1305 | |
| 1306 | Output_data_plt_sparc(Layout*); |
| 1307 | |
| 1308 | // Add an entry to the PLT. |
| 1309 | void add_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym); |
| 1310 | |
| 1311 | // Add an entry to the PLT for a local STT_GNU_IFUNC symbol. |
| 1312 | unsigned int |
| 1313 | add_local_ifunc_entry(Symbol_table*, Layout*, |
| 1314 | Sized_relobj_file<size, big_endian>* relobj, |
| 1315 | unsigned int local_sym_index); |
| 1316 | |
| 1317 | // Return the .rela.plt section data. |
| 1318 | const Reloc_section* rel_plt() const |
| 1319 | { |
| 1320 | return this->rel_; |
| 1321 | } |
| 1322 | |
| 1323 | // Return where the IFUNC relocations should go. |
| 1324 | Reloc_section* |
| 1325 | rela_ifunc(Symbol_table*, Layout*); |
| 1326 | |
| 1327 | void |
| 1328 | emit_pending_ifunc_relocs(); |
| 1329 | |
| 1330 | // Return whether we created a section for IFUNC relocations. |
| 1331 | bool |
| 1332 | has_ifunc_section() const |
| 1333 | { return this->ifunc_rel_ != NULL; } |
| 1334 | |
| 1335 | // Return the number of PLT entries. |
| 1336 | unsigned int |
| 1337 | entry_count() const |
| 1338 | { return this->count_ + this->ifunc_count_; } |
| 1339 | |
| 1340 | // Return the offset of the first non-reserved PLT entry. |
| 1341 | static unsigned int |
| 1342 | first_plt_entry_offset() |
| 1343 | { return 4 * base_plt_entry_size; } |
| 1344 | |
| 1345 | // Return the size of a PLT entry. |
| 1346 | static unsigned int |
| 1347 | get_plt_entry_size() |
| 1348 | { return base_plt_entry_size; } |
| 1349 | |
| 1350 | // Return the PLT address to use for a global symbol. |
| 1351 | uint64_t |
| 1352 | address_for_global(const Symbol*); |
| 1353 | |
| 1354 | // Return the PLT address to use for a local symbol. |
| 1355 | uint64_t |
| 1356 | address_for_local(const Relobj*, unsigned int symndx); |
| 1357 | |
| 1358 | protected: |
| 1359 | void do_adjust_output_section(Output_section* os); |
| 1360 | |
| 1361 | // Write to a map file. |
| 1362 | void |
| 1363 | do_print_to_mapfile(Mapfile* mapfile) const |
| 1364 | { mapfile->print_output_data(this, _("** PLT")); } |
| 1365 | |
| 1366 | private: |
| 1367 | // The size of an entry in the PLT. |
| 1368 | static const int base_plt_entry_size = (size == 32 ? 12 : 32); |
| 1369 | |
| 1370 | static const unsigned int plt_entries_per_block = 160; |
| 1371 | static const unsigned int plt_insn_chunk_size = 24; |
| 1372 | static const unsigned int plt_pointer_chunk_size = 8; |
| 1373 | static const unsigned int plt_block_size = |
| 1374 | (plt_entries_per_block |
| 1375 | * (plt_insn_chunk_size + plt_pointer_chunk_size)); |
| 1376 | |
| 1377 | section_offset_type |
| 1378 | plt_index_to_offset(unsigned int index) |
| 1379 | { |
| 1380 | section_offset_type offset; |
| 1381 | |
| 1382 | if (size == 32 || index < 32768) |
| 1383 | offset = index * base_plt_entry_size; |
| 1384 | else |
| 1385 | { |
| 1386 | unsigned int ext_index = index - 32768; |
| 1387 | |
| 1388 | offset = (32768 * base_plt_entry_size) |
| 1389 | + ((ext_index / plt_entries_per_block) |
| 1390 | * plt_block_size) |
| 1391 | + ((ext_index % plt_entries_per_block) |
| 1392 | * plt_insn_chunk_size); |
| 1393 | } |
| 1394 | return offset; |
| 1395 | } |
| 1396 | |
| 1397 | // Set the final size. |
| 1398 | void |
| 1399 | set_final_data_size() |
| 1400 | { |
| 1401 | unsigned int full_count = this->entry_count() + 4; |
| 1402 | unsigned int extra = (size == 32 ? 4 : 0); |
| 1403 | section_offset_type sz = plt_index_to_offset(full_count) + extra; |
| 1404 | |
| 1405 | return this->set_data_size(sz); |
| 1406 | } |
| 1407 | |
| 1408 | // Write out the PLT data. |
| 1409 | void |
| 1410 | do_write(Output_file*); |
| 1411 | |
| 1412 | struct Global_ifunc |
| 1413 | { |
| 1414 | Reloc_section* rel; |
| 1415 | Symbol* gsym; |
| 1416 | unsigned int plt_index; |
| 1417 | }; |
| 1418 | |
| 1419 | struct Local_ifunc |
| 1420 | { |
| 1421 | Reloc_section* rel; |
| 1422 | Sized_relobj_file<size, big_endian>* object; |
| 1423 | unsigned int local_sym_index; |
| 1424 | unsigned int plt_index; |
| 1425 | }; |
| 1426 | |
| 1427 | // The reloc section. |
| 1428 | Reloc_section* rel_; |
| 1429 | // The IFUNC relocations, if necessary. These must follow the |
| 1430 | // regular relocations. |
| 1431 | Reloc_section* ifunc_rel_; |
| 1432 | // The number of PLT entries. |
| 1433 | unsigned int count_; |
| 1434 | // The number of PLT entries for IFUNC symbols. |
| 1435 | unsigned int ifunc_count_; |
| 1436 | // Global STT_GNU_IFUNC symbols. |
| 1437 | std::vector<Global_ifunc> global_ifuncs_; |
| 1438 | // Local STT_GNU_IFUNC symbols. |
| 1439 | std::vector<Local_ifunc> local_ifuncs_; |
| 1440 | }; |
| 1441 | |
| 1442 | // Define the constants as required by C++ standard. |
| 1443 | |
| 1444 | template<int size, bool big_endian> |
| 1445 | const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size; |
| 1446 | |
| 1447 | template<int size, bool big_endian> |
| 1448 | const unsigned int |
| 1449 | Output_data_plt_sparc<size, big_endian>::plt_entries_per_block; |
| 1450 | |
| 1451 | template<int size, bool big_endian> |
| 1452 | const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size; |
| 1453 | |
| 1454 | template<int size, bool big_endian> |
| 1455 | const unsigned int |
| 1456 | Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size; |
| 1457 | |
| 1458 | template<int size, bool big_endian> |
| 1459 | const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size; |
| 1460 | |
| 1461 | // Create the PLT section. The ordinary .got section is an argument, |
| 1462 | // since we need to refer to the start. |
| 1463 | |
| 1464 | template<int size, bool big_endian> |
| 1465 | Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout) |
| 1466 | : Output_section_data(size == 32 ? 4 : 8), ifunc_rel_(NULL), |
| 1467 | count_(0), ifunc_count_(0), global_ifuncs_(), local_ifuncs_() |
| 1468 | { |
| 1469 | this->rel_ = new Reloc_section(false); |
| 1470 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, |
| 1471 | elfcpp::SHF_ALLOC, this->rel_, |
| 1472 | ORDER_DYNAMIC_PLT_RELOCS, false); |
| 1473 | } |
| 1474 | |
| 1475 | template<int size, bool big_endian> |
| 1476 | void |
| 1477 | Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os) |
| 1478 | { |
| 1479 | os->set_entsize(0); |
| 1480 | } |
| 1481 | |
| 1482 | // Add an entry to the PLT. |
| 1483 | |
| 1484 | template<int size, bool big_endian> |
| 1485 | void |
| 1486 | Output_data_plt_sparc<size, big_endian>::add_entry(Symbol_table* symtab, |
| 1487 | Layout* layout, |
| 1488 | Symbol* gsym) |
| 1489 | { |
| 1490 | gold_assert(!gsym->has_plt_offset()); |
| 1491 | |
| 1492 | section_offset_type plt_offset; |
| 1493 | unsigned int index; |
| 1494 | |
| 1495 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
| 1496 | && gsym->can_use_relative_reloc(false)) |
| 1497 | { |
| 1498 | index = this->ifunc_count_; |
| 1499 | plt_offset = plt_index_to_offset(index); |
| 1500 | gsym->set_plt_offset(plt_offset); |
| 1501 | ++this->ifunc_count_; |
| 1502 | Reloc_section* rel = this->rela_ifunc(symtab, layout); |
| 1503 | |
| 1504 | struct Global_ifunc gi; |
| 1505 | gi.rel = rel; |
| 1506 | gi.gsym = gsym; |
| 1507 | gi.plt_index = index; |
| 1508 | this->global_ifuncs_.push_back(gi); |
| 1509 | } |
| 1510 | else |
| 1511 | { |
| 1512 | plt_offset = plt_index_to_offset(this->count_ + 4); |
| 1513 | gsym->set_plt_offset(plt_offset); |
| 1514 | ++this->count_; |
| 1515 | gsym->set_needs_dynsym_entry(); |
| 1516 | this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this, |
| 1517 | plt_offset, 0); |
| 1518 | } |
| 1519 | |
| 1520 | // Note that we don't need to save the symbol. The contents of the |
| 1521 | // PLT are independent of which symbols are used. The symbols only |
| 1522 | // appear in the relocations. |
| 1523 | } |
| 1524 | |
| 1525 | template<int size, bool big_endian> |
| 1526 | unsigned int |
| 1527 | Output_data_plt_sparc<size, big_endian>::add_local_ifunc_entry( |
| 1528 | Symbol_table* symtab, |
| 1529 | Layout* layout, |
| 1530 | Sized_relobj_file<size, big_endian>* relobj, |
| 1531 | unsigned int local_sym_index) |
| 1532 | { |
| 1533 | unsigned int index = this->ifunc_count_; |
| 1534 | section_offset_type plt_offset; |
| 1535 | |
| 1536 | plt_offset = plt_index_to_offset(index); |
| 1537 | ++this->ifunc_count_; |
| 1538 | |
| 1539 | Reloc_section* rel = this->rela_ifunc(symtab, layout); |
| 1540 | |
| 1541 | struct Local_ifunc li; |
| 1542 | li.rel = rel; |
| 1543 | li.object = relobj; |
| 1544 | li.local_sym_index = local_sym_index; |
| 1545 | li.plt_index = index; |
| 1546 | this->local_ifuncs_.push_back(li); |
| 1547 | |
| 1548 | return plt_offset; |
| 1549 | } |
| 1550 | |
| 1551 | // Emit any pending IFUNC plt relocations. |
| 1552 | |
| 1553 | template<int size, bool big_endian> |
| 1554 | void |
| 1555 | Output_data_plt_sparc<size, big_endian>::emit_pending_ifunc_relocs() |
| 1556 | { |
| 1557 | // Emit any pending IFUNC relocs. |
| 1558 | for (typename std::vector<Global_ifunc>::const_iterator p = |
| 1559 | this->global_ifuncs_.begin(); |
| 1560 | p != this->global_ifuncs_.end(); |
| 1561 | ++p) |
| 1562 | { |
| 1563 | section_offset_type plt_offset; |
| 1564 | unsigned int index; |
| 1565 | |
| 1566 | index = this->count_ + p->plt_index + 4; |
| 1567 | plt_offset = this->plt_index_to_offset(index); |
| 1568 | p->rel->add_symbolless_global_addend(p->gsym, elfcpp::R_SPARC_JMP_IREL, |
| 1569 | this, plt_offset, 0); |
| 1570 | } |
| 1571 | |
| 1572 | for (typename std::vector<Local_ifunc>::const_iterator p = |
| 1573 | this->local_ifuncs_.begin(); |
| 1574 | p != this->local_ifuncs_.end(); |
| 1575 | ++p) |
| 1576 | { |
| 1577 | section_offset_type plt_offset; |
| 1578 | unsigned int index; |
| 1579 | |
| 1580 | index = this->count_ + p->plt_index + 4; |
| 1581 | plt_offset = this->plt_index_to_offset(index); |
| 1582 | p->rel->add_symbolless_local_addend(p->object, p->local_sym_index, |
| 1583 | elfcpp::R_SPARC_JMP_IREL, |
| 1584 | this, plt_offset, 0); |
| 1585 | } |
| 1586 | } |
| 1587 | |
| 1588 | // Return where the IFUNC relocations should go in the PLT. These |
| 1589 | // follow the non-IFUNC relocations. |
| 1590 | |
| 1591 | template<int size, bool big_endian> |
| 1592 | typename Output_data_plt_sparc<size, big_endian>::Reloc_section* |
| 1593 | Output_data_plt_sparc<size, big_endian>::rela_ifunc( |
| 1594 | Symbol_table* symtab, |
| 1595 | Layout* layout) |
| 1596 | { |
| 1597 | if (this->ifunc_rel_ == NULL) |
| 1598 | { |
| 1599 | this->ifunc_rel_ = new Reloc_section(false); |
| 1600 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, |
| 1601 | elfcpp::SHF_ALLOC, this->ifunc_rel_, |
| 1602 | ORDER_DYNAMIC_PLT_RELOCS, false); |
| 1603 | gold_assert(this->ifunc_rel_->output_section() |
| 1604 | == this->rel_->output_section()); |
| 1605 | |
| 1606 | if (parameters->doing_static_link()) |
| 1607 | { |
| 1608 | // A statically linked executable will only have a .rel.plt |
| 1609 | // section to hold R_SPARC_IRELATIVE and R_SPARC_JMP_IREL |
| 1610 | // relocs for STT_GNU_IFUNC symbols. The library will use |
| 1611 | // these symbols to locate the IRELATIVE and JMP_IREL relocs |
| 1612 | // at program startup time. |
| 1613 | symtab->define_in_output_data("__rela_iplt_start", NULL, |
| 1614 | Symbol_table::PREDEFINED, |
| 1615 | this->ifunc_rel_, 0, 0, |
| 1616 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
| 1617 | elfcpp::STV_HIDDEN, 0, false, true); |
| 1618 | symtab->define_in_output_data("__rela_iplt_end", NULL, |
| 1619 | Symbol_table::PREDEFINED, |
| 1620 | this->ifunc_rel_, 0, 0, |
| 1621 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
| 1622 | elfcpp::STV_HIDDEN, 0, true, true); |
| 1623 | } |
| 1624 | } |
| 1625 | return this->ifunc_rel_; |
| 1626 | } |
| 1627 | |
| 1628 | // Return the PLT address to use for a global symbol. |
| 1629 | |
| 1630 | template<int size, bool big_endian> |
| 1631 | uint64_t |
| 1632 | Output_data_plt_sparc<size, big_endian>::address_for_global(const Symbol* gsym) |
| 1633 | { |
| 1634 | uint64_t offset = 0; |
| 1635 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
| 1636 | && gsym->can_use_relative_reloc(false)) |
| 1637 | offset = plt_index_to_offset(this->count_ + 4); |
| 1638 | return this->address() + offset + gsym->plt_offset(); |
| 1639 | } |
| 1640 | |
| 1641 | // Return the PLT address to use for a local symbol. These are always |
| 1642 | // IRELATIVE relocs. |
| 1643 | |
| 1644 | template<int size, bool big_endian> |
| 1645 | uint64_t |
| 1646 | Output_data_plt_sparc<size, big_endian>::address_for_local( |
| 1647 | const Relobj* object, |
| 1648 | unsigned int r_sym) |
| 1649 | { |
| 1650 | return (this->address() |
| 1651 | + plt_index_to_offset(this->count_ + 4) |
| 1652 | + object->local_plt_offset(r_sym)); |
| 1653 | } |
| 1654 | |
| 1655 | static const unsigned int sparc_nop = 0x01000000; |
| 1656 | static const unsigned int sparc_sethi_g1 = 0x03000000; |
| 1657 | static const unsigned int sparc_branch_always = 0x30800000; |
| 1658 | static const unsigned int sparc_branch_always_pt = 0x30680000; |
| 1659 | static const unsigned int sparc_mov = 0x80100000; |
| 1660 | static const unsigned int sparc_mov_g0_o0 = 0x90100000; |
| 1661 | static const unsigned int sparc_mov_o7_g5 = 0x8a10000f; |
| 1662 | static const unsigned int sparc_call_plus_8 = 0x40000002; |
| 1663 | static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000; |
| 1664 | static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001; |
| 1665 | static const unsigned int sparc_mov_g5_o7 = 0x9e100005; |
| 1666 | |
| 1667 | // Write out the PLT. |
| 1668 | |
| 1669 | template<int size, bool big_endian> |
| 1670 | void |
| 1671 | Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of) |
| 1672 | { |
| 1673 | const off_t offset = this->offset(); |
| 1674 | const section_size_type oview_size = |
| 1675 | convert_to_section_size_type(this->data_size()); |
| 1676 | unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 1677 | unsigned char* pov = oview; |
| 1678 | |
| 1679 | memset(pov, 0, base_plt_entry_size * 4); |
| 1680 | pov += this->first_plt_entry_offset(); |
| 1681 | |
| 1682 | unsigned int plt_offset = base_plt_entry_size * 4; |
| 1683 | const unsigned int count = this->entry_count(); |
| 1684 | |
| 1685 | if (size == 64) |
| 1686 | { |
| 1687 | unsigned int limit; |
| 1688 | |
| 1689 | limit = (count > 32768 ? 32768 : count); |
| 1690 | |
| 1691 | for (unsigned int i = 0; i < limit; ++i) |
| 1692 | { |
| 1693 | elfcpp::Swap<32, true>::writeval(pov + 0x00, |
| 1694 | sparc_sethi_g1 + plt_offset); |
| 1695 | elfcpp::Swap<32, true>::writeval(pov + 0x04, |
| 1696 | sparc_branch_always_pt + |
| 1697 | (((base_plt_entry_size - |
| 1698 | (plt_offset + 4)) >> 2) & |
| 1699 | 0x7ffff)); |
| 1700 | elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); |
| 1701 | elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop); |
| 1702 | elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop); |
| 1703 | elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop); |
| 1704 | elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop); |
| 1705 | elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop); |
| 1706 | |
| 1707 | pov += base_plt_entry_size; |
| 1708 | plt_offset += base_plt_entry_size; |
| 1709 | } |
| 1710 | |
| 1711 | if (count > 32768) |
| 1712 | { |
| 1713 | unsigned int ext_cnt = count - 32768; |
| 1714 | unsigned int blks = ext_cnt / plt_entries_per_block; |
| 1715 | |
| 1716 | for (unsigned int i = 0; i < blks; ++i) |
| 1717 | { |
| 1718 | unsigned int data_off = (plt_entries_per_block |
| 1719 | * plt_insn_chunk_size) - 4; |
| 1720 | |
| 1721 | for (unsigned int j = 0; j < plt_entries_per_block; ++j) |
| 1722 | { |
| 1723 | elfcpp::Swap<32, true>::writeval(pov + 0x00, |
| 1724 | sparc_mov_o7_g5); |
| 1725 | elfcpp::Swap<32, true>::writeval(pov + 0x04, |
| 1726 | sparc_call_plus_8); |
| 1727 | elfcpp::Swap<32, true>::writeval(pov + 0x08, |
| 1728 | sparc_nop); |
| 1729 | elfcpp::Swap<32, true>::writeval(pov + 0x0c, |
| 1730 | sparc_ldx_o7_imm_g1 + |
| 1731 | (data_off & 0x1fff)); |
| 1732 | elfcpp::Swap<32, true>::writeval(pov + 0x10, |
| 1733 | sparc_jmpl_o7_g1_g1); |
| 1734 | elfcpp::Swap<32, true>::writeval(pov + 0x14, |
| 1735 | sparc_mov_g5_o7); |
| 1736 | |
| 1737 | elfcpp::Swap<64, big_endian>::writeval( |
| 1738 | pov + 0x4 + data_off, |
| 1739 | (elfcpp::Elf_Xword) (oview - (pov + 0x04))); |
| 1740 | |
| 1741 | pov += plt_insn_chunk_size; |
| 1742 | data_off -= 16; |
| 1743 | } |
| 1744 | } |
| 1745 | |
| 1746 | unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block; |
| 1747 | for (unsigned int i = 0; i < sub_blk_cnt; ++i) |
| 1748 | { |
| 1749 | unsigned int data_off = (sub_blk_cnt |
| 1750 | * plt_insn_chunk_size) - 4; |
| 1751 | |
| 1752 | for (unsigned int j = 0; j < plt_entries_per_block; ++j) |
| 1753 | { |
| 1754 | elfcpp::Swap<32, true>::writeval(pov + 0x00, |
| 1755 | sparc_mov_o7_g5); |
| 1756 | elfcpp::Swap<32, true>::writeval(pov + 0x04, |
| 1757 | sparc_call_plus_8); |
| 1758 | elfcpp::Swap<32, true>::writeval(pov + 0x08, |
| 1759 | sparc_nop); |
| 1760 | elfcpp::Swap<32, true>::writeval(pov + 0x0c, |
| 1761 | sparc_ldx_o7_imm_g1 + |
| 1762 | (data_off & 0x1fff)); |
| 1763 | elfcpp::Swap<32, true>::writeval(pov + 0x10, |
| 1764 | sparc_jmpl_o7_g1_g1); |
| 1765 | elfcpp::Swap<32, true>::writeval(pov + 0x14, |
| 1766 | sparc_mov_g5_o7); |
| 1767 | |
| 1768 | elfcpp::Swap<64, big_endian>::writeval( |
| 1769 | pov + 0x4 + data_off, |
| 1770 | (elfcpp::Elf_Xword) (oview - (pov + 0x04))); |
| 1771 | |
| 1772 | pov += plt_insn_chunk_size; |
| 1773 | data_off -= 16; |
| 1774 | } |
| 1775 | } |
| 1776 | } |
| 1777 | } |
| 1778 | else |
| 1779 | { |
| 1780 | for (unsigned int i = 0; i < count; ++i) |
| 1781 | { |
| 1782 | elfcpp::Swap<32, true>::writeval(pov + 0x00, |
| 1783 | sparc_sethi_g1 + plt_offset); |
| 1784 | elfcpp::Swap<32, true>::writeval(pov + 0x04, |
| 1785 | sparc_branch_always + |
| 1786 | (((- (plt_offset + 4)) >> 2) & |
| 1787 | 0x003fffff)); |
| 1788 | elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); |
| 1789 | |
| 1790 | pov += base_plt_entry_size; |
| 1791 | plt_offset += base_plt_entry_size; |
| 1792 | } |
| 1793 | |
| 1794 | elfcpp::Swap<32, true>::writeval(pov, sparc_nop); |
| 1795 | pov += 4; |
| 1796 | } |
| 1797 | |
| 1798 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
| 1799 | |
| 1800 | of->write_output_view(offset, oview_size, oview); |
| 1801 | } |
| 1802 | |
| 1803 | // Create the PLT section. |
| 1804 | |
| 1805 | template<int size, bool big_endian> |
| 1806 | void |
| 1807 | Target_sparc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
| 1808 | Layout* layout) |
| 1809 | { |
| 1810 | // Create the GOT sections first. |
| 1811 | this->got_section(symtab, layout); |
| 1812 | |
| 1813 | // Ensure that .rela.dyn always appears before .rela.plt This is |
| 1814 | // necessary due to how, on Sparc and some other targets, .rela.dyn |
| 1815 | // needs to include .rela.plt in it's range. |
| 1816 | this->rela_dyn_section(layout); |
| 1817 | |
| 1818 | this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout); |
| 1819 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, |
| 1820 | (elfcpp::SHF_ALLOC |
| 1821 | | elfcpp::SHF_EXECINSTR |
| 1822 | | elfcpp::SHF_WRITE), |
| 1823 | this->plt_, ORDER_NON_RELRO_FIRST, false); |
| 1824 | |
| 1825 | // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. |
| 1826 | symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, |
| 1827 | Symbol_table::PREDEFINED, |
| 1828 | this->plt_, |
| 1829 | 0, 0, elfcpp::STT_OBJECT, |
| 1830 | elfcpp::STB_LOCAL, |
| 1831 | elfcpp::STV_HIDDEN, 0, |
| 1832 | false, false); |
| 1833 | } |
| 1834 | |
| 1835 | // Create a PLT entry for a global symbol. |
| 1836 | |
| 1837 | template<int size, bool big_endian> |
| 1838 | void |
| 1839 | Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
| 1840 | Layout* layout, |
| 1841 | Symbol* gsym) |
| 1842 | { |
| 1843 | if (gsym->has_plt_offset()) |
| 1844 | return; |
| 1845 | |
| 1846 | if (this->plt_ == NULL) |
| 1847 | this->make_plt_section(symtab, layout); |
| 1848 | |
| 1849 | this->plt_->add_entry(symtab, layout, gsym); |
| 1850 | } |
| 1851 | |
| 1852 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
| 1853 | |
| 1854 | template<int size, bool big_endian> |
| 1855 | void |
| 1856 | Target_sparc<size, big_endian>::make_local_ifunc_plt_entry( |
| 1857 | Symbol_table* symtab, |
| 1858 | Layout* layout, |
| 1859 | Sized_relobj_file<size, big_endian>* relobj, |
| 1860 | unsigned int local_sym_index) |
| 1861 | { |
| 1862 | if (relobj->local_has_plt_offset(local_sym_index)) |
| 1863 | return; |
| 1864 | if (this->plt_ == NULL) |
| 1865 | this->make_plt_section(symtab, layout); |
| 1866 | unsigned int plt_offset = this->plt_->add_local_ifunc_entry(symtab, layout, |
| 1867 | relobj, |
| 1868 | local_sym_index); |
| 1869 | relobj->set_local_plt_offset(local_sym_index, plt_offset); |
| 1870 | } |
| 1871 | |
| 1872 | // Return the number of entries in the PLT. |
| 1873 | |
| 1874 | template<int size, bool big_endian> |
| 1875 | unsigned int |
| 1876 | Target_sparc<size, big_endian>::plt_entry_count() const |
| 1877 | { |
| 1878 | if (this->plt_ == NULL) |
| 1879 | return 0; |
| 1880 | return this->plt_->entry_count(); |
| 1881 | } |
| 1882 | |
| 1883 | // Return the offset of the first non-reserved PLT entry. |
| 1884 | |
| 1885 | template<int size, bool big_endian> |
| 1886 | unsigned int |
| 1887 | Target_sparc<size, big_endian>::first_plt_entry_offset() const |
| 1888 | { |
| 1889 | return Output_data_plt_sparc<size, big_endian>::first_plt_entry_offset(); |
| 1890 | } |
| 1891 | |
| 1892 | // Return the size of each PLT entry. |
| 1893 | |
| 1894 | template<int size, bool big_endian> |
| 1895 | unsigned int |
| 1896 | Target_sparc<size, big_endian>::plt_entry_size() const |
| 1897 | { |
| 1898 | return Output_data_plt_sparc<size, big_endian>::get_plt_entry_size(); |
| 1899 | } |
| 1900 | |
| 1901 | // Create a GOT entry for the TLS module index. |
| 1902 | |
| 1903 | template<int size, bool big_endian> |
| 1904 | unsigned int |
| 1905 | Target_sparc<size, big_endian>::got_mod_index_entry( |
| 1906 | Symbol_table* symtab, |
| 1907 | Layout* layout, |
| 1908 | Sized_relobj_file<size, big_endian>* object) |
| 1909 | { |
| 1910 | if (this->got_mod_index_offset_ == -1U) |
| 1911 | { |
| 1912 | gold_assert(symtab != NULL && layout != NULL && object != NULL); |
| 1913 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); |
| 1914 | Output_data_got<size, big_endian>* got; |
| 1915 | unsigned int got_offset; |
| 1916 | |
| 1917 | got = this->got_section(symtab, layout); |
| 1918 | got_offset = got->add_constant(0); |
| 1919 | rela_dyn->add_local(object, 0, |
| 1920 | (size == 64 ? |
| 1921 | elfcpp::R_SPARC_TLS_DTPMOD64 : |
| 1922 | elfcpp::R_SPARC_TLS_DTPMOD32), got, |
| 1923 | got_offset, 0); |
| 1924 | got->add_constant(0); |
| 1925 | this->got_mod_index_offset_ = got_offset; |
| 1926 | } |
| 1927 | return this->got_mod_index_offset_; |
| 1928 | } |
| 1929 | |
| 1930 | // Optimize the TLS relocation type based on what we know about the |
| 1931 | // symbol. IS_FINAL is true if the final address of this symbol is |
| 1932 | // known at link time. |
| 1933 | |
| 1934 | static tls::Tls_optimization |
| 1935 | optimize_tls_reloc(bool is_final, int r_type) |
| 1936 | { |
| 1937 | // If we are generating a shared library, then we can't do anything |
| 1938 | // in the linker. |
| 1939 | if (parameters->options().shared()) |
| 1940 | return tls::TLSOPT_NONE; |
| 1941 | |
| 1942 | switch (r_type) |
| 1943 | { |
| 1944 | case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| 1945 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 1946 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 1947 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 1948 | // These are General-Dynamic which permits fully general TLS |
| 1949 | // access. Since we know that we are generating an executable, |
| 1950 | // we can convert this to Initial-Exec. If we also know that |
| 1951 | // this is a local symbol, we can further switch to Local-Exec. |
| 1952 | if (is_final) |
| 1953 | return tls::TLSOPT_TO_LE; |
| 1954 | return tls::TLSOPT_TO_IE; |
| 1955 | |
| 1956 | case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic |
| 1957 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 1958 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 1959 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 1960 | // This is Local-Dynamic, which refers to a local symbol in the |
| 1961 | // dynamic TLS block. Since we know that we generating an |
| 1962 | // executable, we can switch to Local-Exec. |
| 1963 | return tls::TLSOPT_TO_LE; |
| 1964 | |
| 1965 | case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| 1966 | case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| 1967 | case elfcpp::R_SPARC_TLS_LDO_ADD: |
| 1968 | // Another type of Local-Dynamic relocation. |
| 1969 | return tls::TLSOPT_TO_LE; |
| 1970 | |
| 1971 | case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| 1972 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 1973 | case elfcpp::R_SPARC_TLS_IE_LD: |
| 1974 | case elfcpp::R_SPARC_TLS_IE_LDX: |
| 1975 | case elfcpp::R_SPARC_TLS_IE_ADD: |
| 1976 | // These are Initial-Exec relocs which get the thread offset |
| 1977 | // from the GOT. If we know that we are linking against the |
| 1978 | // local symbol, we can switch to Local-Exec, which links the |
| 1979 | // thread offset into the instruction. |
| 1980 | if (is_final) |
| 1981 | return tls::TLSOPT_TO_LE; |
| 1982 | return tls::TLSOPT_NONE; |
| 1983 | |
| 1984 | case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec |
| 1985 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 1986 | // When we already have Local-Exec, there is nothing further we |
| 1987 | // can do. |
| 1988 | return tls::TLSOPT_NONE; |
| 1989 | |
| 1990 | default: |
| 1991 | gold_unreachable(); |
| 1992 | } |
| 1993 | } |
| 1994 | |
| 1995 | // Get the Reference_flags for a particular relocation. |
| 1996 | |
| 1997 | template<int size, bool big_endian> |
| 1998 | int |
| 1999 | Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
| 2000 | { |
| 2001 | r_type &= 0xff; |
| 2002 | switch (r_type) |
| 2003 | { |
| 2004 | case elfcpp::R_SPARC_NONE: |
| 2005 | case elfcpp::R_SPARC_REGISTER: |
| 2006 | case elfcpp::R_SPARC_GNU_VTINHERIT: |
| 2007 | case elfcpp::R_SPARC_GNU_VTENTRY: |
| 2008 | // No symbol reference. |
| 2009 | return 0; |
| 2010 | |
| 2011 | case elfcpp::R_SPARC_UA64: |
| 2012 | case elfcpp::R_SPARC_64: |
| 2013 | case elfcpp::R_SPARC_HIX22: |
| 2014 | case elfcpp::R_SPARC_LOX10: |
| 2015 | case elfcpp::R_SPARC_H34: |
| 2016 | case elfcpp::R_SPARC_H44: |
| 2017 | case elfcpp::R_SPARC_M44: |
| 2018 | case elfcpp::R_SPARC_L44: |
| 2019 | case elfcpp::R_SPARC_HH22: |
| 2020 | case elfcpp::R_SPARC_HM10: |
| 2021 | case elfcpp::R_SPARC_LM22: |
| 2022 | case elfcpp::R_SPARC_HI22: |
| 2023 | case elfcpp::R_SPARC_LO10: |
| 2024 | case elfcpp::R_SPARC_OLO10: |
| 2025 | case elfcpp::R_SPARC_UA32: |
| 2026 | case elfcpp::R_SPARC_32: |
| 2027 | case elfcpp::R_SPARC_UA16: |
| 2028 | case elfcpp::R_SPARC_16: |
| 2029 | case elfcpp::R_SPARC_11: |
| 2030 | case elfcpp::R_SPARC_10: |
| 2031 | case elfcpp::R_SPARC_8: |
| 2032 | case elfcpp::R_SPARC_7: |
| 2033 | case elfcpp::R_SPARC_6: |
| 2034 | case elfcpp::R_SPARC_5: |
| 2035 | return Symbol::ABSOLUTE_REF; |
| 2036 | |
| 2037 | case elfcpp::R_SPARC_DISP8: |
| 2038 | case elfcpp::R_SPARC_DISP16: |
| 2039 | case elfcpp::R_SPARC_DISP32: |
| 2040 | case elfcpp::R_SPARC_DISP64: |
| 2041 | case elfcpp::R_SPARC_PC_HH22: |
| 2042 | case elfcpp::R_SPARC_PC_HM10: |
| 2043 | case elfcpp::R_SPARC_PC_LM22: |
| 2044 | case elfcpp::R_SPARC_PC10: |
| 2045 | case elfcpp::R_SPARC_PC22: |
| 2046 | case elfcpp::R_SPARC_WDISP30: |
| 2047 | case elfcpp::R_SPARC_WDISP22: |
| 2048 | case elfcpp::R_SPARC_WDISP19: |
| 2049 | case elfcpp::R_SPARC_WDISP16: |
| 2050 | case elfcpp::R_SPARC_WDISP10: |
| 2051 | return Symbol::RELATIVE_REF; |
| 2052 | |
| 2053 | case elfcpp::R_SPARC_PLT64: |
| 2054 | case elfcpp::R_SPARC_PLT32: |
| 2055 | case elfcpp::R_SPARC_HIPLT22: |
| 2056 | case elfcpp::R_SPARC_LOPLT10: |
| 2057 | case elfcpp::R_SPARC_PCPLT10: |
| 2058 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
| 2059 | |
| 2060 | case elfcpp::R_SPARC_PCPLT32: |
| 2061 | case elfcpp::R_SPARC_PCPLT22: |
| 2062 | case elfcpp::R_SPARC_WPLT30: |
| 2063 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
| 2064 | |
| 2065 | case elfcpp::R_SPARC_GOTDATA_OP: |
| 2066 | case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| 2067 | case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| 2068 | case elfcpp::R_SPARC_GOT10: |
| 2069 | case elfcpp::R_SPARC_GOT13: |
| 2070 | case elfcpp::R_SPARC_GOT22: |
| 2071 | // Absolute in GOT. |
| 2072 | return Symbol::ABSOLUTE_REF; |
| 2073 | |
| 2074 | case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| 2075 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 2076 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 2077 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 2078 | case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic |
| 2079 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 2080 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 2081 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 2082 | case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| 2083 | case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| 2084 | case elfcpp::R_SPARC_TLS_LDO_ADD: |
| 2085 | case elfcpp::R_SPARC_TLS_LE_HIX22: |
| 2086 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 2087 | case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| 2088 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 2089 | case elfcpp::R_SPARC_TLS_IE_LD: |
| 2090 | case elfcpp::R_SPARC_TLS_IE_LDX: |
| 2091 | case elfcpp::R_SPARC_TLS_IE_ADD: |
| 2092 | return Symbol::TLS_REF; |
| 2093 | |
| 2094 | case elfcpp::R_SPARC_COPY: |
| 2095 | case elfcpp::R_SPARC_GLOB_DAT: |
| 2096 | case elfcpp::R_SPARC_JMP_SLOT: |
| 2097 | case elfcpp::R_SPARC_JMP_IREL: |
| 2098 | case elfcpp::R_SPARC_RELATIVE: |
| 2099 | case elfcpp::R_SPARC_IRELATIVE: |
| 2100 | case elfcpp::R_SPARC_TLS_DTPMOD64: |
| 2101 | case elfcpp::R_SPARC_TLS_DTPMOD32: |
| 2102 | case elfcpp::R_SPARC_TLS_DTPOFF64: |
| 2103 | case elfcpp::R_SPARC_TLS_DTPOFF32: |
| 2104 | case elfcpp::R_SPARC_TLS_TPOFF64: |
| 2105 | case elfcpp::R_SPARC_TLS_TPOFF32: |
| 2106 | default: |
| 2107 | // Not expected. We will give an error later. |
| 2108 | return 0; |
| 2109 | } |
| 2110 | } |
| 2111 | |
| 2112 | // Generate a PLT entry slot for a call to __tls_get_addr |
| 2113 | template<int size, bool big_endian> |
| 2114 | void |
| 2115 | Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab, |
| 2116 | Layout* layout, |
| 2117 | Target_sparc<size, big_endian>* target) |
| 2118 | { |
| 2119 | Symbol* gsym = target->tls_get_addr_sym(symtab); |
| 2120 | |
| 2121 | target->make_plt_entry(symtab, layout, gsym); |
| 2122 | } |
| 2123 | |
| 2124 | // Report an unsupported relocation against a local symbol. |
| 2125 | |
| 2126 | template<int size, bool big_endian> |
| 2127 | void |
| 2128 | Target_sparc<size, big_endian>::Scan::unsupported_reloc_local( |
| 2129 | Sized_relobj_file<size, big_endian>* object, |
| 2130 | unsigned int r_type) |
| 2131 | { |
| 2132 | gold_error(_("%s: unsupported reloc %u against local symbol"), |
| 2133 | object->name().c_str(), r_type); |
| 2134 | } |
| 2135 | |
| 2136 | // We are about to emit a dynamic relocation of type R_TYPE. If the |
| 2137 | // dynamic linker does not support it, issue an error. |
| 2138 | |
| 2139 | template<int size, bool big_endian> |
| 2140 | void |
| 2141 | Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type) |
| 2142 | { |
| 2143 | gold_assert(r_type != elfcpp::R_SPARC_NONE); |
| 2144 | |
| 2145 | if (size == 64) |
| 2146 | { |
| 2147 | switch (r_type) |
| 2148 | { |
| 2149 | // These are the relocation types supported by glibc for sparc 64-bit. |
| 2150 | case elfcpp::R_SPARC_RELATIVE: |
| 2151 | case elfcpp::R_SPARC_IRELATIVE: |
| 2152 | case elfcpp::R_SPARC_COPY: |
| 2153 | case elfcpp::R_SPARC_32: |
| 2154 | case elfcpp::R_SPARC_64: |
| 2155 | case elfcpp::R_SPARC_GLOB_DAT: |
| 2156 | case elfcpp::R_SPARC_JMP_SLOT: |
| 2157 | case elfcpp::R_SPARC_JMP_IREL: |
| 2158 | case elfcpp::R_SPARC_TLS_DTPMOD64: |
| 2159 | case elfcpp::R_SPARC_TLS_DTPOFF64: |
| 2160 | case elfcpp::R_SPARC_TLS_TPOFF64: |
| 2161 | case elfcpp::R_SPARC_TLS_LE_HIX22: |
| 2162 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 2163 | case elfcpp::R_SPARC_8: |
| 2164 | case elfcpp::R_SPARC_16: |
| 2165 | case elfcpp::R_SPARC_DISP8: |
| 2166 | case elfcpp::R_SPARC_DISP16: |
| 2167 | case elfcpp::R_SPARC_DISP32: |
| 2168 | case elfcpp::R_SPARC_WDISP30: |
| 2169 | case elfcpp::R_SPARC_LO10: |
| 2170 | case elfcpp::R_SPARC_HI22: |
| 2171 | case elfcpp::R_SPARC_OLO10: |
| 2172 | case elfcpp::R_SPARC_H34: |
| 2173 | case elfcpp::R_SPARC_H44: |
| 2174 | case elfcpp::R_SPARC_M44: |
| 2175 | case elfcpp::R_SPARC_L44: |
| 2176 | case elfcpp::R_SPARC_HH22: |
| 2177 | case elfcpp::R_SPARC_HM10: |
| 2178 | case elfcpp::R_SPARC_LM22: |
| 2179 | case elfcpp::R_SPARC_UA16: |
| 2180 | case elfcpp::R_SPARC_UA32: |
| 2181 | case elfcpp::R_SPARC_UA64: |
| 2182 | return; |
| 2183 | |
| 2184 | default: |
| 2185 | break; |
| 2186 | } |
| 2187 | } |
| 2188 | else |
| 2189 | { |
| 2190 | switch (r_type) |
| 2191 | { |
| 2192 | // These are the relocation types supported by glibc for sparc 32-bit. |
| 2193 | case elfcpp::R_SPARC_RELATIVE: |
| 2194 | case elfcpp::R_SPARC_IRELATIVE: |
| 2195 | case elfcpp::R_SPARC_COPY: |
| 2196 | case elfcpp::R_SPARC_GLOB_DAT: |
| 2197 | case elfcpp::R_SPARC_32: |
| 2198 | case elfcpp::R_SPARC_JMP_SLOT: |
| 2199 | case elfcpp::R_SPARC_JMP_IREL: |
| 2200 | case elfcpp::R_SPARC_TLS_DTPMOD32: |
| 2201 | case elfcpp::R_SPARC_TLS_DTPOFF32: |
| 2202 | case elfcpp::R_SPARC_TLS_TPOFF32: |
| 2203 | case elfcpp::R_SPARC_TLS_LE_HIX22: |
| 2204 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 2205 | case elfcpp::R_SPARC_8: |
| 2206 | case elfcpp::R_SPARC_16: |
| 2207 | case elfcpp::R_SPARC_DISP8: |
| 2208 | case elfcpp::R_SPARC_DISP16: |
| 2209 | case elfcpp::R_SPARC_DISP32: |
| 2210 | case elfcpp::R_SPARC_LO10: |
| 2211 | case elfcpp::R_SPARC_WDISP30: |
| 2212 | case elfcpp::R_SPARC_HI22: |
| 2213 | case elfcpp::R_SPARC_UA16: |
| 2214 | case elfcpp::R_SPARC_UA32: |
| 2215 | return; |
| 2216 | |
| 2217 | default: |
| 2218 | break; |
| 2219 | } |
| 2220 | } |
| 2221 | |
| 2222 | // This prevents us from issuing more than one error per reloc |
| 2223 | // section. But we can still wind up issuing more than one |
| 2224 | // error per object file. |
| 2225 | if (this->issued_non_pic_error_) |
| 2226 | return; |
| 2227 | gold_assert(parameters->options().output_is_position_independent()); |
| 2228 | object->error(_("requires unsupported dynamic reloc; " |
| 2229 | "recompile with -fPIC")); |
| 2230 | this->issued_non_pic_error_ = true; |
| 2231 | return; |
| 2232 | } |
| 2233 | |
| 2234 | // Return whether we need to make a PLT entry for a relocation of the |
| 2235 | // given type against a STT_GNU_IFUNC symbol. |
| 2236 | |
| 2237 | template<int size, bool big_endian> |
| 2238 | bool |
| 2239 | Target_sparc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( |
| 2240 | Sized_relobj_file<size, big_endian>* object, |
| 2241 | unsigned int r_type) |
| 2242 | { |
| 2243 | int flags = Scan::get_reference_flags(r_type); |
| 2244 | if (flags & Symbol::TLS_REF) |
| 2245 | gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"), |
| 2246 | object->name().c_str(), r_type); |
| 2247 | return flags != 0; |
| 2248 | } |
| 2249 | |
| 2250 | // Scan a relocation for a local symbol. |
| 2251 | |
| 2252 | template<int size, bool big_endian> |
| 2253 | inline void |
| 2254 | Target_sparc<size, big_endian>::Scan::local( |
| 2255 | Symbol_table* symtab, |
| 2256 | Layout* layout, |
| 2257 | Target_sparc<size, big_endian>* target, |
| 2258 | Sized_relobj_file<size, big_endian>* object, |
| 2259 | unsigned int data_shndx, |
| 2260 | Output_section* output_section, |
| 2261 | const elfcpp::Rela<size, big_endian>& reloc, |
| 2262 | unsigned int r_type, |
| 2263 | const elfcpp::Sym<size, big_endian>& lsym, |
| 2264 | bool is_discarded) |
| 2265 | { |
| 2266 | if (is_discarded) |
| 2267 | return; |
| 2268 | |
| 2269 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; |
| 2270 | unsigned int orig_r_type = r_type; |
| 2271 | r_type &= 0xff; |
| 2272 | |
| 2273 | if (is_ifunc |
| 2274 | && this->reloc_needs_plt_for_ifunc(object, r_type)) |
| 2275 | { |
| 2276 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 2277 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); |
| 2278 | } |
| 2279 | |
| 2280 | switch (r_type) |
| 2281 | { |
| 2282 | case elfcpp::R_SPARC_NONE: |
| 2283 | case elfcpp::R_SPARC_REGISTER: |
| 2284 | case elfcpp::R_SPARC_GNU_VTINHERIT: |
| 2285 | case elfcpp::R_SPARC_GNU_VTENTRY: |
| 2286 | break; |
| 2287 | |
| 2288 | case elfcpp::R_SPARC_64: |
| 2289 | case elfcpp::R_SPARC_32: |
| 2290 | // If building a shared library (or a position-independent |
| 2291 | // executable), we need to create a dynamic relocation for |
| 2292 | // this location. The relocation applied at link time will |
| 2293 | // apply the link-time value, so we flag the location with |
| 2294 | // an R_SPARC_RELATIVE relocation so the dynamic loader can |
| 2295 | // relocate it easily. |
| 2296 | if (parameters->options().output_is_position_independent() |
| 2297 | && ((size == 64 && r_type == elfcpp::R_SPARC_64) |
| 2298 | || (size == 32 && r_type == elfcpp::R_SPARC_32))) |
| 2299 | { |
| 2300 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2301 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 2302 | rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE, |
| 2303 | output_section, data_shndx, |
| 2304 | reloc.get_r_offset(), |
| 2305 | reloc.get_r_addend(), is_ifunc); |
| 2306 | break; |
| 2307 | } |
| 2308 | // Fall through. |
| 2309 | |
| 2310 | case elfcpp::R_SPARC_HIX22: |
| 2311 | case elfcpp::R_SPARC_LOX10: |
| 2312 | case elfcpp::R_SPARC_H34: |
| 2313 | case elfcpp::R_SPARC_H44: |
| 2314 | case elfcpp::R_SPARC_M44: |
| 2315 | case elfcpp::R_SPARC_L44: |
| 2316 | case elfcpp::R_SPARC_HH22: |
| 2317 | case elfcpp::R_SPARC_HM10: |
| 2318 | case elfcpp::R_SPARC_LM22: |
| 2319 | case elfcpp::R_SPARC_UA64: |
| 2320 | case elfcpp::R_SPARC_UA32: |
| 2321 | case elfcpp::R_SPARC_UA16: |
| 2322 | case elfcpp::R_SPARC_HI22: |
| 2323 | case elfcpp::R_SPARC_LO10: |
| 2324 | case elfcpp::R_SPARC_OLO10: |
| 2325 | case elfcpp::R_SPARC_16: |
| 2326 | case elfcpp::R_SPARC_11: |
| 2327 | case elfcpp::R_SPARC_10: |
| 2328 | case elfcpp::R_SPARC_8: |
| 2329 | case elfcpp::R_SPARC_7: |
| 2330 | case elfcpp::R_SPARC_6: |
| 2331 | case elfcpp::R_SPARC_5: |
| 2332 | // If building a shared library (or a position-independent |
| 2333 | // executable), we need to create a dynamic relocation for |
| 2334 | // this location. |
| 2335 | if (parameters->options().output_is_position_independent()) |
| 2336 | { |
| 2337 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2338 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 2339 | |
| 2340 | check_non_pic(object, r_type); |
| 2341 | if (lsym.get_st_type() != elfcpp::STT_SECTION) |
| 2342 | { |
| 2343 | rela_dyn->add_local(object, r_sym, orig_r_type, output_section, |
| 2344 | data_shndx, reloc.get_r_offset(), |
| 2345 | reloc.get_r_addend()); |
| 2346 | } |
| 2347 | else |
| 2348 | { |
| 2349 | gold_assert(lsym.get_st_value() == 0); |
| 2350 | rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type, |
| 2351 | output_section, data_shndx, |
| 2352 | reloc.get_r_offset(), |
| 2353 | reloc.get_r_addend()); |
| 2354 | } |
| 2355 | } |
| 2356 | break; |
| 2357 | |
| 2358 | case elfcpp::R_SPARC_WDISP30: |
| 2359 | case elfcpp::R_SPARC_WPLT30: |
| 2360 | case elfcpp::R_SPARC_WDISP22: |
| 2361 | case elfcpp::R_SPARC_WDISP19: |
| 2362 | case elfcpp::R_SPARC_WDISP16: |
| 2363 | case elfcpp::R_SPARC_WDISP10: |
| 2364 | case elfcpp::R_SPARC_DISP8: |
| 2365 | case elfcpp::R_SPARC_DISP16: |
| 2366 | case elfcpp::R_SPARC_DISP32: |
| 2367 | case elfcpp::R_SPARC_DISP64: |
| 2368 | case elfcpp::R_SPARC_PC10: |
| 2369 | case elfcpp::R_SPARC_PC22: |
| 2370 | break; |
| 2371 | |
| 2372 | case elfcpp::R_SPARC_GOTDATA_OP: |
| 2373 | case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| 2374 | case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| 2375 | // We will optimize this into a GOT relative relocation |
| 2376 | // and code transform the GOT load into an addition. |
| 2377 | break; |
| 2378 | |
| 2379 | case elfcpp::R_SPARC_GOT10: |
| 2380 | case elfcpp::R_SPARC_GOT13: |
| 2381 | case elfcpp::R_SPARC_GOT22: |
| 2382 | { |
| 2383 | // The symbol requires a GOT entry. |
| 2384 | Output_data_got<size, big_endian>* got; |
| 2385 | unsigned int r_sym; |
| 2386 | |
| 2387 | got = target->got_section(symtab, layout); |
| 2388 | r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 2389 | |
| 2390 | // If we are generating a shared object, we need to add a |
| 2391 | // dynamic relocation for this symbol's GOT entry. |
| 2392 | if (parameters->options().output_is_position_independent()) |
| 2393 | { |
| 2394 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) |
| 2395 | { |
| 2396 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2397 | unsigned int off = got->add_constant(0); |
| 2398 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); |
| 2399 | rela_dyn->add_local_relative(object, r_sym, |
| 2400 | elfcpp::R_SPARC_RELATIVE, |
| 2401 | got, off, 0, is_ifunc); |
| 2402 | } |
| 2403 | } |
| 2404 | else |
| 2405 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); |
| 2406 | } |
| 2407 | break; |
| 2408 | |
| 2409 | // These are initial TLS relocs, which are expected when |
| 2410 | // linking. |
| 2411 | case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| 2412 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 2413 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 2414 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 2415 | case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic |
| 2416 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 2417 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 2418 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 2419 | case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| 2420 | case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| 2421 | case elfcpp::R_SPARC_TLS_LDO_ADD: |
| 2422 | case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| 2423 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 2424 | case elfcpp::R_SPARC_TLS_IE_LD: |
| 2425 | case elfcpp::R_SPARC_TLS_IE_LDX: |
| 2426 | case elfcpp::R_SPARC_TLS_IE_ADD: |
| 2427 | case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec |
| 2428 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 2429 | { |
| 2430 | bool output_is_shared = parameters->options().shared(); |
| 2431 | const tls::Tls_optimization optimized_type |
| 2432 | = optimize_tls_reloc(!output_is_shared, r_type); |
| 2433 | switch (r_type) |
| 2434 | { |
| 2435 | case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| 2436 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 2437 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 2438 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 2439 | if (optimized_type == tls::TLSOPT_NONE) |
| 2440 | { |
| 2441 | // Create a pair of GOT entries for the module index and |
| 2442 | // dtv-relative offset. |
| 2443 | Output_data_got<size, big_endian>* got |
| 2444 | = target->got_section(symtab, layout); |
| 2445 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 2446 | unsigned int shndx = lsym.get_st_shndx(); |
| 2447 | bool is_ordinary; |
| 2448 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); |
| 2449 | if (!is_ordinary) |
| 2450 | object->error(_("local symbol %u has bad shndx %u"), |
| 2451 | r_sym, shndx); |
| 2452 | else |
| 2453 | got->add_local_pair_with_rel(object, r_sym, |
| 2454 | lsym.get_st_shndx(), |
| 2455 | GOT_TYPE_TLS_PAIR, |
| 2456 | target->rela_dyn_section(layout), |
| 2457 | (size == 64 |
| 2458 | ? elfcpp::R_SPARC_TLS_DTPMOD64 |
| 2459 | : elfcpp::R_SPARC_TLS_DTPMOD32)); |
| 2460 | if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) |
| 2461 | generate_tls_call(symtab, layout, target); |
| 2462 | } |
| 2463 | else if (optimized_type != tls::TLSOPT_TO_LE) |
| 2464 | unsupported_reloc_local(object, r_type); |
| 2465 | break; |
| 2466 | |
| 2467 | case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic |
| 2468 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 2469 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 2470 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 2471 | if (optimized_type == tls::TLSOPT_NONE) |
| 2472 | { |
| 2473 | // Create a GOT entry for the module index. |
| 2474 | target->got_mod_index_entry(symtab, layout, object); |
| 2475 | |
| 2476 | if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL) |
| 2477 | generate_tls_call(symtab, layout, target); |
| 2478 | } |
| 2479 | else if (optimized_type != tls::TLSOPT_TO_LE) |
| 2480 | unsupported_reloc_local(object, r_type); |
| 2481 | break; |
| 2482 | |
| 2483 | case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| 2484 | case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| 2485 | case elfcpp::R_SPARC_TLS_LDO_ADD: |
| 2486 | break; |
| 2487 | |
| 2488 | case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| 2489 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 2490 | case elfcpp::R_SPARC_TLS_IE_LD: |
| 2491 | case elfcpp::R_SPARC_TLS_IE_LDX: |
| 2492 | case elfcpp::R_SPARC_TLS_IE_ADD: |
| 2493 | layout->set_has_static_tls(); |
| 2494 | if (optimized_type == tls::TLSOPT_NONE) |
| 2495 | { |
| 2496 | // Create a GOT entry for the tp-relative offset. |
| 2497 | Output_data_got<size, big_endian>* got |
| 2498 | = target->got_section(symtab, layout); |
| 2499 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 2500 | |
| 2501 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)) |
| 2502 | { |
| 2503 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2504 | unsigned int off = got->add_constant(0); |
| 2505 | |
| 2506 | object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET, off); |
| 2507 | |
| 2508 | rela_dyn->add_symbolless_local_addend(object, r_sym, |
| 2509 | (size == 64 ? |
| 2510 | elfcpp::R_SPARC_TLS_TPOFF64 : |
| 2511 | elfcpp::R_SPARC_TLS_TPOFF32), |
| 2512 | got, off, 0); |
| 2513 | } |
| 2514 | } |
| 2515 | else if (optimized_type != tls::TLSOPT_TO_LE) |
| 2516 | unsupported_reloc_local(object, r_type); |
| 2517 | break; |
| 2518 | |
| 2519 | case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec |
| 2520 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 2521 | layout->set_has_static_tls(); |
| 2522 | if (output_is_shared) |
| 2523 | { |
| 2524 | // We need to create a dynamic relocation. |
| 2525 | gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION); |
| 2526 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 2527 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2528 | rela_dyn->add_symbolless_local_addend(object, r_sym, r_type, |
| 2529 | output_section, data_shndx, |
| 2530 | reloc.get_r_offset(), 0); |
| 2531 | } |
| 2532 | break; |
| 2533 | } |
| 2534 | } |
| 2535 | break; |
| 2536 | |
| 2537 | // These are relocations which should only be seen by the |
| 2538 | // dynamic linker, and should never be seen here. |
| 2539 | case elfcpp::R_SPARC_COPY: |
| 2540 | case elfcpp::R_SPARC_GLOB_DAT: |
| 2541 | case elfcpp::R_SPARC_JMP_SLOT: |
| 2542 | case elfcpp::R_SPARC_JMP_IREL: |
| 2543 | case elfcpp::R_SPARC_RELATIVE: |
| 2544 | case elfcpp::R_SPARC_IRELATIVE: |
| 2545 | case elfcpp::R_SPARC_TLS_DTPMOD64: |
| 2546 | case elfcpp::R_SPARC_TLS_DTPMOD32: |
| 2547 | case elfcpp::R_SPARC_TLS_DTPOFF64: |
| 2548 | case elfcpp::R_SPARC_TLS_DTPOFF32: |
| 2549 | case elfcpp::R_SPARC_TLS_TPOFF64: |
| 2550 | case elfcpp::R_SPARC_TLS_TPOFF32: |
| 2551 | gold_error(_("%s: unexpected reloc %u in object file"), |
| 2552 | object->name().c_str(), r_type); |
| 2553 | break; |
| 2554 | |
| 2555 | default: |
| 2556 | unsupported_reloc_local(object, r_type); |
| 2557 | break; |
| 2558 | } |
| 2559 | } |
| 2560 | |
| 2561 | // Report an unsupported relocation against a global symbol. |
| 2562 | |
| 2563 | template<int size, bool big_endian> |
| 2564 | void |
| 2565 | Target_sparc<size, big_endian>::Scan::unsupported_reloc_global( |
| 2566 | Sized_relobj_file<size, big_endian>* object, |
| 2567 | unsigned int r_type, |
| 2568 | Symbol* gsym) |
| 2569 | { |
| 2570 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
| 2571 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); |
| 2572 | } |
| 2573 | |
| 2574 | // Scan a relocation for a global symbol. |
| 2575 | |
| 2576 | template<int size, bool big_endian> |
| 2577 | inline void |
| 2578 | Target_sparc<size, big_endian>::Scan::global( |
| 2579 | Symbol_table* symtab, |
| 2580 | Layout* layout, |
| 2581 | Target_sparc<size, big_endian>* target, |
| 2582 | Sized_relobj_file<size, big_endian>* object, |
| 2583 | unsigned int data_shndx, |
| 2584 | Output_section* output_section, |
| 2585 | const elfcpp::Rela<size, big_endian>& reloc, |
| 2586 | unsigned int r_type, |
| 2587 | Symbol* gsym) |
| 2588 | { |
| 2589 | unsigned int orig_r_type = r_type; |
| 2590 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
| 2591 | |
| 2592 | // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got |
| 2593 | // section. We check here to avoid creating a dynamic reloc against |
| 2594 | // _GLOBAL_OFFSET_TABLE_. |
| 2595 | if (!target->has_got_section() |
| 2596 | && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2597 | target->got_section(symtab, layout); |
| 2598 | |
| 2599 | r_type &= 0xff; |
| 2600 | |
| 2601 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
| 2602 | if (is_ifunc |
| 2603 | && this->reloc_needs_plt_for_ifunc(object, r_type)) |
| 2604 | target->make_plt_entry(symtab, layout, gsym); |
| 2605 | |
| 2606 | switch (r_type) |
| 2607 | { |
| 2608 | case elfcpp::R_SPARC_NONE: |
| 2609 | case elfcpp::R_SPARC_REGISTER: |
| 2610 | case elfcpp::R_SPARC_GNU_VTINHERIT: |
| 2611 | case elfcpp::R_SPARC_GNU_VTENTRY: |
| 2612 | break; |
| 2613 | |
| 2614 | case elfcpp::R_SPARC_PLT64: |
| 2615 | case elfcpp::R_SPARC_PLT32: |
| 2616 | case elfcpp::R_SPARC_HIPLT22: |
| 2617 | case elfcpp::R_SPARC_LOPLT10: |
| 2618 | case elfcpp::R_SPARC_PCPLT32: |
| 2619 | case elfcpp::R_SPARC_PCPLT22: |
| 2620 | case elfcpp::R_SPARC_PCPLT10: |
| 2621 | case elfcpp::R_SPARC_WPLT30: |
| 2622 | // If the symbol is fully resolved, this is just a PC32 reloc. |
| 2623 | // Otherwise we need a PLT entry. |
| 2624 | if (gsym->final_value_is_known()) |
| 2625 | break; |
| 2626 | // If building a shared library, we can also skip the PLT entry |
| 2627 | // if the symbol is defined in the output file and is protected |
| 2628 | // or hidden. |
| 2629 | if (gsym->is_defined() |
| 2630 | && !gsym->is_from_dynobj() |
| 2631 | && !gsym->is_preemptible()) |
| 2632 | break; |
| 2633 | target->make_plt_entry(symtab, layout, gsym); |
| 2634 | break; |
| 2635 | |
| 2636 | case elfcpp::R_SPARC_DISP8: |
| 2637 | case elfcpp::R_SPARC_DISP16: |
| 2638 | case elfcpp::R_SPARC_DISP32: |
| 2639 | case elfcpp::R_SPARC_DISP64: |
| 2640 | case elfcpp::R_SPARC_PC_HH22: |
| 2641 | case elfcpp::R_SPARC_PC_HM10: |
| 2642 | case elfcpp::R_SPARC_PC_LM22: |
| 2643 | case elfcpp::R_SPARC_PC10: |
| 2644 | case elfcpp::R_SPARC_PC22: |
| 2645 | case elfcpp::R_SPARC_WDISP30: |
| 2646 | case elfcpp::R_SPARC_WDISP22: |
| 2647 | case elfcpp::R_SPARC_WDISP19: |
| 2648 | case elfcpp::R_SPARC_WDISP16: |
| 2649 | case elfcpp::R_SPARC_WDISP10: |
| 2650 | { |
| 2651 | if (gsym->needs_plt_entry()) |
| 2652 | target->make_plt_entry(symtab, layout, gsym); |
| 2653 | // Make a dynamic relocation if necessary. |
| 2654 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
| 2655 | { |
| 2656 | if (parameters->options().output_is_executable() |
| 2657 | && gsym->may_need_copy_reloc()) |
| 2658 | { |
| 2659 | target->copy_reloc(symtab, layout, object, |
| 2660 | data_shndx, output_section, gsym, |
| 2661 | reloc); |
| 2662 | } |
| 2663 | else |
| 2664 | { |
| 2665 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2666 | check_non_pic(object, r_type); |
| 2667 | rela_dyn->add_global(gsym, orig_r_type, output_section, object, |
| 2668 | data_shndx, reloc.get_r_offset(), |
| 2669 | reloc.get_r_addend()); |
| 2670 | } |
| 2671 | } |
| 2672 | } |
| 2673 | break; |
| 2674 | |
| 2675 | case elfcpp::R_SPARC_UA64: |
| 2676 | case elfcpp::R_SPARC_64: |
| 2677 | case elfcpp::R_SPARC_HIX22: |
| 2678 | case elfcpp::R_SPARC_LOX10: |
| 2679 | case elfcpp::R_SPARC_H34: |
| 2680 | case elfcpp::R_SPARC_H44: |
| 2681 | case elfcpp::R_SPARC_M44: |
| 2682 | case elfcpp::R_SPARC_L44: |
| 2683 | case elfcpp::R_SPARC_HH22: |
| 2684 | case elfcpp::R_SPARC_HM10: |
| 2685 | case elfcpp::R_SPARC_LM22: |
| 2686 | case elfcpp::R_SPARC_HI22: |
| 2687 | case elfcpp::R_SPARC_LO10: |
| 2688 | case elfcpp::R_SPARC_OLO10: |
| 2689 | case elfcpp::R_SPARC_UA32: |
| 2690 | case elfcpp::R_SPARC_32: |
| 2691 | case elfcpp::R_SPARC_UA16: |
| 2692 | case elfcpp::R_SPARC_16: |
| 2693 | case elfcpp::R_SPARC_11: |
| 2694 | case elfcpp::R_SPARC_10: |
| 2695 | case elfcpp::R_SPARC_8: |
| 2696 | case elfcpp::R_SPARC_7: |
| 2697 | case elfcpp::R_SPARC_6: |
| 2698 | case elfcpp::R_SPARC_5: |
| 2699 | { |
| 2700 | // Make a PLT entry if necessary. |
| 2701 | if (gsym->needs_plt_entry()) |
| 2702 | { |
| 2703 | target->make_plt_entry(symtab, layout, gsym); |
| 2704 | // Since this is not a PC-relative relocation, we may be |
| 2705 | // taking the address of a function. In that case we need to |
| 2706 | // set the entry in the dynamic symbol table to the address of |
| 2707 | // the PLT entry. |
| 2708 | if (gsym->is_from_dynobj() && !parameters->options().shared()) |
| 2709 | gsym->set_needs_dynsym_value(); |
| 2710 | } |
| 2711 | // Make a dynamic relocation if necessary. |
| 2712 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
| 2713 | { |
| 2714 | unsigned int r_off = reloc.get_r_offset(); |
| 2715 | |
| 2716 | // The assembler can sometimes emit unaligned relocations |
| 2717 | // for dwarf2 cfi directives. |
| 2718 | switch (r_type) |
| 2719 | { |
| 2720 | case elfcpp::R_SPARC_16: |
| 2721 | if (r_off & 0x1) |
| 2722 | orig_r_type = r_type = elfcpp::R_SPARC_UA16; |
| 2723 | break; |
| 2724 | case elfcpp::R_SPARC_32: |
| 2725 | if (r_off & 0x3) |
| 2726 | orig_r_type = r_type = elfcpp::R_SPARC_UA32; |
| 2727 | break; |
| 2728 | case elfcpp::R_SPARC_64: |
| 2729 | if (r_off & 0x7) |
| 2730 | orig_r_type = r_type = elfcpp::R_SPARC_UA64; |
| 2731 | break; |
| 2732 | case elfcpp::R_SPARC_UA16: |
| 2733 | if (!(r_off & 0x1)) |
| 2734 | orig_r_type = r_type = elfcpp::R_SPARC_16; |
| 2735 | break; |
| 2736 | case elfcpp::R_SPARC_UA32: |
| 2737 | if (!(r_off & 0x3)) |
| 2738 | orig_r_type = r_type = elfcpp::R_SPARC_32; |
| 2739 | break; |
| 2740 | case elfcpp::R_SPARC_UA64: |
| 2741 | if (!(r_off & 0x7)) |
| 2742 | orig_r_type = r_type = elfcpp::R_SPARC_64; |
| 2743 | break; |
| 2744 | } |
| 2745 | |
| 2746 | if (!parameters->options().output_is_position_independent() |
| 2747 | && gsym->may_need_copy_reloc()) |
| 2748 | { |
| 2749 | target->copy_reloc(symtab, layout, object, |
| 2750 | data_shndx, output_section, gsym, reloc); |
| 2751 | } |
| 2752 | else if (((size == 64 && r_type == elfcpp::R_SPARC_64) |
| 2753 | || (size == 32 && r_type == elfcpp::R_SPARC_32)) |
| 2754 | && gsym->type() == elfcpp::STT_GNU_IFUNC |
| 2755 | && gsym->can_use_relative_reloc(false) |
| 2756 | && !gsym->is_from_dynobj() |
| 2757 | && !gsym->is_undefined() |
| 2758 | && !gsym->is_preemptible()) |
| 2759 | { |
| 2760 | // Use an IRELATIVE reloc for a locally defined |
| 2761 | // STT_GNU_IFUNC symbol. This makes a function |
| 2762 | // address in a PIE executable match the address in a |
| 2763 | // shared library that it links against. |
| 2764 | Reloc_section* rela_dyn = |
| 2765 | target->rela_ifunc_section(layout); |
| 2766 | unsigned int r_type = elfcpp::R_SPARC_IRELATIVE; |
| 2767 | rela_dyn->add_symbolless_global_addend(gsym, r_type, |
| 2768 | output_section, object, |
| 2769 | data_shndx, |
| 2770 | reloc.get_r_offset(), |
| 2771 | reloc.get_r_addend()); |
| 2772 | } |
| 2773 | else if (((size == 64 && r_type == elfcpp::R_SPARC_64) |
| 2774 | || (size == 32 && r_type == elfcpp::R_SPARC_32)) |
| 2775 | && gsym->can_use_relative_reloc(false)) |
| 2776 | { |
| 2777 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2778 | rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE, |
| 2779 | output_section, object, |
| 2780 | data_shndx, reloc.get_r_offset(), |
| 2781 | reloc.get_r_addend(), is_ifunc); |
| 2782 | } |
| 2783 | else |
| 2784 | { |
| 2785 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2786 | |
| 2787 | check_non_pic(object, r_type); |
| 2788 | if (gsym->is_from_dynobj() |
| 2789 | || gsym->is_undefined() |
| 2790 | || gsym->is_preemptible()) |
| 2791 | rela_dyn->add_global(gsym, orig_r_type, output_section, |
| 2792 | object, data_shndx, |
| 2793 | reloc.get_r_offset(), |
| 2794 | reloc.get_r_addend()); |
| 2795 | else |
| 2796 | rela_dyn->add_symbolless_global_addend(gsym, orig_r_type, |
| 2797 | output_section, |
| 2798 | object, data_shndx, |
| 2799 | reloc.get_r_offset(), |
| 2800 | reloc.get_r_addend()); |
| 2801 | } |
| 2802 | } |
| 2803 | } |
| 2804 | break; |
| 2805 | |
| 2806 | case elfcpp::R_SPARC_GOTDATA_OP: |
| 2807 | case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| 2808 | case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| 2809 | if (gsym->is_defined() |
| 2810 | && !gsym->is_from_dynobj() |
| 2811 | && !gsym->is_preemptible() |
| 2812 | && !is_ifunc) |
| 2813 | { |
| 2814 | // We will optimize this into a GOT relative relocation |
| 2815 | // and code transform the GOT load into an addition. |
| 2816 | break; |
| 2817 | } |
| 2818 | // Fall through. |
| 2819 | case elfcpp::R_SPARC_GOT10: |
| 2820 | case elfcpp::R_SPARC_GOT13: |
| 2821 | case elfcpp::R_SPARC_GOT22: |
| 2822 | { |
| 2823 | // The symbol requires a GOT entry. |
| 2824 | Output_data_got<size, big_endian>* got; |
| 2825 | |
| 2826 | got = target->got_section(symtab, layout); |
| 2827 | if (gsym->final_value_is_known()) |
| 2828 | { |
| 2829 | // For a STT_GNU_IFUNC symbol we want the PLT address. |
| 2830 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) |
| 2831 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
| 2832 | else |
| 2833 | got->add_global(gsym, GOT_TYPE_STANDARD); |
| 2834 | } |
| 2835 | else |
| 2836 | { |
| 2837 | // If this symbol is not fully resolved, we need to add a |
| 2838 | // GOT entry with a dynamic relocation. |
| 2839 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
| 2840 | |
| 2841 | // Use a GLOB_DAT rather than a RELATIVE reloc if: |
| 2842 | // |
| 2843 | // 1) The symbol may be defined in some other module. |
| 2844 | // |
| 2845 | // 2) We are building a shared library and this is a |
| 2846 | // protected symbol; using GLOB_DAT means that the dynamic |
| 2847 | // linker can use the address of the PLT in the main |
| 2848 | // executable when appropriate so that function address |
| 2849 | // comparisons work. |
| 2850 | // |
| 2851 | // 3) This is a STT_GNU_IFUNC symbol in position dependent |
| 2852 | // code, again so that function address comparisons work. |
| 2853 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2854 | if (gsym->is_from_dynobj() |
| 2855 | || gsym->is_undefined() |
| 2856 | || gsym->is_preemptible() |
| 2857 | || (gsym->visibility() == elfcpp::STV_PROTECTED |
| 2858 | && parameters->options().shared()) |
| 2859 | || (gsym->type() == elfcpp::STT_GNU_IFUNC |
| 2860 | && parameters->options().output_is_position_independent() |
| 2861 | && !gsym->is_forced_local())) |
| 2862 | { |
| 2863 | unsigned int r_type = elfcpp::R_SPARC_GLOB_DAT; |
| 2864 | |
| 2865 | // If this symbol is forced local, this relocation will |
| 2866 | // not work properly. That's because ld.so on sparc |
| 2867 | // (and 32-bit powerpc) expects st_value in the r_addend |
| 2868 | // of relocations for STB_LOCAL symbols. Curiously the |
| 2869 | // BFD linker does not promote global hidden symbols to be |
| 2870 | // STB_LOCAL in the dynamic symbol table like Gold does. |
| 2871 | gold_assert(!gsym->is_forced_local()); |
| 2872 | got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn, |
| 2873 | r_type); |
| 2874 | } |
| 2875 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) |
| 2876 | { |
| 2877 | unsigned int off = got->add_constant(0); |
| 2878 | |
| 2879 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); |
| 2880 | if (is_ifunc) |
| 2881 | { |
| 2882 | // Tell the dynamic linker to use the PLT address |
| 2883 | // when resolving relocations. |
| 2884 | if (gsym->is_from_dynobj() |
| 2885 | && !parameters->options().shared()) |
| 2886 | gsym->set_needs_dynsym_value(); |
| 2887 | } |
| 2888 | rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE, |
| 2889 | got, off, 0, is_ifunc); |
| 2890 | } |
| 2891 | } |
| 2892 | } |
| 2893 | break; |
| 2894 | |
| 2895 | // These are initial tls relocs, which are expected when |
| 2896 | // linking. |
| 2897 | case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| 2898 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 2899 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 2900 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 2901 | case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic |
| 2902 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 2903 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 2904 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 2905 | case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| 2906 | case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| 2907 | case elfcpp::R_SPARC_TLS_LDO_ADD: |
| 2908 | case elfcpp::R_SPARC_TLS_LE_HIX22: |
| 2909 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 2910 | case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| 2911 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 2912 | case elfcpp::R_SPARC_TLS_IE_LD: |
| 2913 | case elfcpp::R_SPARC_TLS_IE_LDX: |
| 2914 | case elfcpp::R_SPARC_TLS_IE_ADD: |
| 2915 | { |
| 2916 | const bool is_final = gsym->final_value_is_known(); |
| 2917 | const tls::Tls_optimization optimized_type |
| 2918 | = optimize_tls_reloc(is_final, r_type); |
| 2919 | switch (r_type) |
| 2920 | { |
| 2921 | case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| 2922 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 2923 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 2924 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 2925 | if (optimized_type == tls::TLSOPT_NONE) |
| 2926 | { |
| 2927 | // Create a pair of GOT entries for the module index and |
| 2928 | // dtv-relative offset. |
| 2929 | Output_data_got<size, big_endian>* got |
| 2930 | = target->got_section(symtab, layout); |
| 2931 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR, |
| 2932 | target->rela_dyn_section(layout), |
| 2933 | (size == 64 |
| 2934 | ? elfcpp::R_SPARC_TLS_DTPMOD64 |
| 2935 | : elfcpp::R_SPARC_TLS_DTPMOD32), |
| 2936 | (size == 64 |
| 2937 | ? elfcpp::R_SPARC_TLS_DTPOFF64 |
| 2938 | : elfcpp::R_SPARC_TLS_DTPOFF32)); |
| 2939 | |
| 2940 | // Emit R_SPARC_WPLT30 against "__tls_get_addr" |
| 2941 | if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) |
| 2942 | generate_tls_call(symtab, layout, target); |
| 2943 | } |
| 2944 | else if (optimized_type == tls::TLSOPT_TO_IE) |
| 2945 | { |
| 2946 | // Create a GOT entry for the tp-relative offset. |
| 2947 | Output_data_got<size, big_endian>* got |
| 2948 | = target->got_section(symtab, layout); |
| 2949 | got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, |
| 2950 | target->rela_dyn_section(layout), |
| 2951 | (size == 64 ? |
| 2952 | elfcpp::R_SPARC_TLS_TPOFF64 : |
| 2953 | elfcpp::R_SPARC_TLS_TPOFF32)); |
| 2954 | } |
| 2955 | else if (optimized_type != tls::TLSOPT_TO_LE) |
| 2956 | unsupported_reloc_global(object, r_type, gsym); |
| 2957 | break; |
| 2958 | |
| 2959 | case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic |
| 2960 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 2961 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 2962 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 2963 | if (optimized_type == tls::TLSOPT_NONE) |
| 2964 | { |
| 2965 | // Create a GOT entry for the module index. |
| 2966 | target->got_mod_index_entry(symtab, layout, object); |
| 2967 | |
| 2968 | if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL) |
| 2969 | generate_tls_call(symtab, layout, target); |
| 2970 | } |
| 2971 | else if (optimized_type != tls::TLSOPT_TO_LE) |
| 2972 | unsupported_reloc_global(object, r_type, gsym); |
| 2973 | break; |
| 2974 | |
| 2975 | case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| 2976 | case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| 2977 | case elfcpp::R_SPARC_TLS_LDO_ADD: |
| 2978 | break; |
| 2979 | |
| 2980 | case elfcpp::R_SPARC_TLS_LE_HIX22: |
| 2981 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 2982 | layout->set_has_static_tls(); |
| 2983 | if (parameters->options().shared()) |
| 2984 | { |
| 2985 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 2986 | rela_dyn->add_symbolless_global_addend(gsym, orig_r_type, |
| 2987 | output_section, object, |
| 2988 | data_shndx, reloc.get_r_offset(), |
| 2989 | 0); |
| 2990 | } |
| 2991 | break; |
| 2992 | |
| 2993 | case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| 2994 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 2995 | case elfcpp::R_SPARC_TLS_IE_LD: |
| 2996 | case elfcpp::R_SPARC_TLS_IE_LDX: |
| 2997 | case elfcpp::R_SPARC_TLS_IE_ADD: |
| 2998 | layout->set_has_static_tls(); |
| 2999 | if (optimized_type == tls::TLSOPT_NONE) |
| 3000 | { |
| 3001 | // Create a GOT entry for the tp-relative offset. |
| 3002 | Output_data_got<size, big_endian>* got |
| 3003 | = target->got_section(symtab, layout); |
| 3004 | got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, |
| 3005 | target->rela_dyn_section(layout), |
| 3006 | (size == 64 |
| 3007 | ? elfcpp::R_SPARC_TLS_TPOFF64 |
| 3008 | : elfcpp::R_SPARC_TLS_TPOFF32)); |
| 3009 | } |
| 3010 | else if (optimized_type != tls::TLSOPT_TO_LE) |
| 3011 | unsupported_reloc_global(object, r_type, gsym); |
| 3012 | break; |
| 3013 | } |
| 3014 | } |
| 3015 | break; |
| 3016 | |
| 3017 | // These are relocations which should only be seen by the |
| 3018 | // dynamic linker, and should never be seen here. |
| 3019 | case elfcpp::R_SPARC_COPY: |
| 3020 | case elfcpp::R_SPARC_GLOB_DAT: |
| 3021 | case elfcpp::R_SPARC_JMP_SLOT: |
| 3022 | case elfcpp::R_SPARC_JMP_IREL: |
| 3023 | case elfcpp::R_SPARC_RELATIVE: |
| 3024 | case elfcpp::R_SPARC_IRELATIVE: |
| 3025 | case elfcpp::R_SPARC_TLS_DTPMOD64: |
| 3026 | case elfcpp::R_SPARC_TLS_DTPMOD32: |
| 3027 | case elfcpp::R_SPARC_TLS_DTPOFF64: |
| 3028 | case elfcpp::R_SPARC_TLS_DTPOFF32: |
| 3029 | case elfcpp::R_SPARC_TLS_TPOFF64: |
| 3030 | case elfcpp::R_SPARC_TLS_TPOFF32: |
| 3031 | gold_error(_("%s: unexpected reloc %u in object file"), |
| 3032 | object->name().c_str(), r_type); |
| 3033 | break; |
| 3034 | |
| 3035 | default: |
| 3036 | unsupported_reloc_global(object, r_type, gsym); |
| 3037 | break; |
| 3038 | } |
| 3039 | } |
| 3040 | |
| 3041 | // Make a new symbol table entry. |
| 3042 | // STT_SPARC_REGISTER symbols require special handling, |
| 3043 | // so we intercept these symbols and keep track of them separately. |
| 3044 | // We will resolve register symbols here and output them at symbol |
| 3045 | // finalization time. |
| 3046 | |
| 3047 | template<int size, bool big_endian> |
| 3048 | Sized_symbol<size>* |
| 3049 | Target_sparc<size, big_endian>::make_symbol(const char* name, |
| 3050 | elfcpp::STT type, |
| 3051 | Object* object, |
| 3052 | unsigned int shndx, |
| 3053 | uint64_t value) |
| 3054 | { |
| 3055 | // REGISTER symbols are used only on SPARC-64. |
| 3056 | if (size == 64 && type == elfcpp::STT_SPARC_REGISTER) |
| 3057 | { |
| 3058 | // Ignore REGISTER symbols in dynamic objects. |
| 3059 | if (object->is_dynamic()) |
| 3060 | return NULL; |
| 3061 | // Only registers 2, 3, 6, and 7 can be declared global. |
| 3062 | int reg = value; |
| 3063 | switch (reg) |
| 3064 | { |
| 3065 | case 2: case 3: |
| 3066 | reg -= 2; |
| 3067 | break; |
| 3068 | case 6: case 7: |
| 3069 | reg -= 4; |
| 3070 | break; |
| 3071 | default: |
| 3072 | gold_error(_("%s: only registers %%g[2367] can be declared " |
| 3073 | "using STT_REGISTER"), |
| 3074 | object->name().c_str()); |
| 3075 | return NULL; |
| 3076 | } |
| 3077 | Register_symbol& rsym = this->register_syms_[reg]; |
| 3078 | if (rsym.name == NULL) |
| 3079 | { |
| 3080 | rsym.name = name; |
| 3081 | rsym.shndx = shndx; |
| 3082 | rsym.obj = object; |
| 3083 | } |
| 3084 | else |
| 3085 | { |
| 3086 | if (strcmp(rsym.name, name) != 0) |
| 3087 | { |
| 3088 | gold_error(_("%s: register %%g%d declared as '%s'; " |
| 3089 | "previously declared as '%s' in %s"), |
| 3090 | object->name().c_str(), |
| 3091 | static_cast<int>(value), |
| 3092 | *name ? name : "#scratch", |
| 3093 | *rsym.name ? rsym.name : "#scratch", |
| 3094 | rsym.obj->name().c_str()); |
| 3095 | return NULL; |
| 3096 | } |
| 3097 | } |
| 3098 | return NULL; |
| 3099 | } |
| 3100 | return new Sized_symbol<size>(); |
| 3101 | } |
| 3102 | |
| 3103 | // Process relocations for gc. |
| 3104 | |
| 3105 | template<int size, bool big_endian> |
| 3106 | void |
| 3107 | Target_sparc<size, big_endian>::gc_process_relocs( |
| 3108 | Symbol_table* symtab, |
| 3109 | Layout* layout, |
| 3110 | Sized_relobj_file<size, big_endian>* object, |
| 3111 | unsigned int data_shndx, |
| 3112 | unsigned int, |
| 3113 | const unsigned char* prelocs, |
| 3114 | size_t reloc_count, |
| 3115 | Output_section* output_section, |
| 3116 | bool needs_special_offset_handling, |
| 3117 | size_t local_symbol_count, |
| 3118 | const unsigned char* plocal_symbols) |
| 3119 | { |
| 3120 | typedef Target_sparc<size, big_endian> Sparc; |
| 3121 | typedef typename Target_sparc<size, big_endian>::Scan Scan; |
| 3122 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 3123 | Classify_reloc; |
| 3124 | |
| 3125 | gold::gc_process_relocs<size, big_endian, Sparc, Scan, Classify_reloc>( |
| 3126 | symtab, |
| 3127 | layout, |
| 3128 | this, |
| 3129 | object, |
| 3130 | data_shndx, |
| 3131 | prelocs, |
| 3132 | reloc_count, |
| 3133 | output_section, |
| 3134 | needs_special_offset_handling, |
| 3135 | local_symbol_count, |
| 3136 | plocal_symbols); |
| 3137 | } |
| 3138 | |
| 3139 | // Scan relocations for a section. |
| 3140 | |
| 3141 | template<int size, bool big_endian> |
| 3142 | void |
| 3143 | Target_sparc<size, big_endian>::scan_relocs( |
| 3144 | Symbol_table* symtab, |
| 3145 | Layout* layout, |
| 3146 | Sized_relobj_file<size, big_endian>* object, |
| 3147 | unsigned int data_shndx, |
| 3148 | unsigned int sh_type, |
| 3149 | const unsigned char* prelocs, |
| 3150 | size_t reloc_count, |
| 3151 | Output_section* output_section, |
| 3152 | bool needs_special_offset_handling, |
| 3153 | size_t local_symbol_count, |
| 3154 | const unsigned char* plocal_symbols) |
| 3155 | { |
| 3156 | typedef Target_sparc<size, big_endian> Sparc; |
| 3157 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 3158 | Classify_reloc; |
| 3159 | |
| 3160 | if (sh_type == elfcpp::SHT_REL) |
| 3161 | { |
| 3162 | gold_error(_("%s: unsupported REL reloc section"), |
| 3163 | object->name().c_str()); |
| 3164 | return; |
| 3165 | } |
| 3166 | |
| 3167 | gold::scan_relocs<size, big_endian, Sparc, Scan, Classify_reloc>( |
| 3168 | symtab, |
| 3169 | layout, |
| 3170 | this, |
| 3171 | object, |
| 3172 | data_shndx, |
| 3173 | prelocs, |
| 3174 | reloc_count, |
| 3175 | output_section, |
| 3176 | needs_special_offset_handling, |
| 3177 | local_symbol_count, |
| 3178 | plocal_symbols); |
| 3179 | } |
| 3180 | |
| 3181 | // Finalize the sections. |
| 3182 | |
| 3183 | template<int size, bool big_endian> |
| 3184 | void |
| 3185 | Target_sparc<size, big_endian>::do_finalize_sections( |
| 3186 | Layout* layout, |
| 3187 | const Input_objects*, |
| 3188 | Symbol_table* symtab) |
| 3189 | { |
| 3190 | if (this->plt_) |
| 3191 | this->plt_->emit_pending_ifunc_relocs(); |
| 3192 | |
| 3193 | // Fill in some more dynamic tags. |
| 3194 | const Reloc_section* rel_plt = (this->plt_ == NULL |
| 3195 | ? NULL |
| 3196 | : this->plt_->rel_plt()); |
| 3197 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, |
| 3198 | this->rela_dyn_, true, true); |
| 3199 | |
| 3200 | // Emit any relocs we saved in an attempt to avoid generating COPY |
| 3201 | // relocs. |
| 3202 | if (this->copy_relocs_.any_saved_relocs()) |
| 3203 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); |
| 3204 | |
| 3205 | if (parameters->doing_static_link() |
| 3206 | && (this->plt_ == NULL || !this->plt_->has_ifunc_section())) |
| 3207 | { |
| 3208 | // If linking statically, make sure that the __rela_iplt symbols |
| 3209 | // were defined if necessary, even if we didn't create a PLT. |
| 3210 | static const Define_symbol_in_segment syms[] = |
| 3211 | { |
| 3212 | { |
| 3213 | "__rela_iplt_start", // name |
| 3214 | elfcpp::PT_LOAD, // segment_type |
| 3215 | elfcpp::PF_W, // segment_flags_set |
| 3216 | elfcpp::PF(0), // segment_flags_clear |
| 3217 | 0, // value |
| 3218 | 0, // size |
| 3219 | elfcpp::STT_NOTYPE, // type |
| 3220 | elfcpp::STB_GLOBAL, // binding |
| 3221 | elfcpp::STV_HIDDEN, // visibility |
| 3222 | 0, // nonvis |
| 3223 | Symbol::SEGMENT_START, // offset_from_base |
| 3224 | true // only_if_ref |
| 3225 | }, |
| 3226 | { |
| 3227 | "__rela_iplt_end", // name |
| 3228 | elfcpp::PT_LOAD, // segment_type |
| 3229 | elfcpp::PF_W, // segment_flags_set |
| 3230 | elfcpp::PF(0), // segment_flags_clear |
| 3231 | 0, // value |
| 3232 | 0, // size |
| 3233 | elfcpp::STT_NOTYPE, // type |
| 3234 | elfcpp::STB_GLOBAL, // binding |
| 3235 | elfcpp::STV_HIDDEN, // visibility |
| 3236 | 0, // nonvis |
| 3237 | Symbol::SEGMENT_START, // offset_from_base |
| 3238 | true // only_if_ref |
| 3239 | } |
| 3240 | }; |
| 3241 | |
| 3242 | symtab->define_symbols(layout, 2, syms, |
| 3243 | layout->script_options()->saw_sections_clause()); |
| 3244 | } |
| 3245 | |
| 3246 | for (int reg = 0; reg < 4; ++reg) |
| 3247 | { |
| 3248 | Register_symbol& rsym = this->register_syms_[reg]; |
| 3249 | if (rsym.name != NULL) |
| 3250 | { |
| 3251 | int value = reg < 3 ? reg + 2 : reg + 4; |
| 3252 | Sized_symbol<size>* sym = new Sized_symbol<size>(); |
| 3253 | if (rsym.shndx == elfcpp::SHN_UNDEF) |
| 3254 | sym->init_undefined(rsym.name, NULL, value, |
| 3255 | elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL, |
| 3256 | elfcpp::STV_DEFAULT, 0); |
| 3257 | else |
| 3258 | sym->init_constant(rsym.name, NULL, value, 0, |
| 3259 | elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL, |
| 3260 | elfcpp::STV_DEFAULT, 0, false); |
| 3261 | symtab->add_target_global_symbol(sym); |
| 3262 | layout->add_target_specific_dynamic_tag(elfcpp::DT_SPARC_REGISTER, |
| 3263 | value); |
| 3264 | } |
| 3265 | } |
| 3266 | } |
| 3267 | |
| 3268 | // Perform a relocation. |
| 3269 | |
| 3270 | template<int size, bool big_endian> |
| 3271 | inline bool |
| 3272 | Target_sparc<size, big_endian>::Relocate::relocate( |
| 3273 | const Relocate_info<size, big_endian>* relinfo, |
| 3274 | unsigned int, |
| 3275 | Target_sparc* target, |
| 3276 | Output_section*, |
| 3277 | size_t relnum, |
| 3278 | const unsigned char* preloc, |
| 3279 | const Sized_symbol<size>* gsym, |
| 3280 | const Symbol_value<size>* psymval, |
| 3281 | unsigned char* view, |
| 3282 | typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 3283 | section_size_type view_size) |
| 3284 | { |
| 3285 | const elfcpp::Rela<size, big_endian> rela(preloc); |
| 3286 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); |
| 3287 | bool orig_is_ifunc = psymval->is_ifunc_symbol(); |
| 3288 | r_type &= 0xff; |
| 3289 | |
| 3290 | if (this->ignore_gd_add_) |
| 3291 | { |
| 3292 | if (r_type != elfcpp::R_SPARC_TLS_GD_ADD) |
| 3293 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 3294 | _("missing expected TLS relocation")); |
| 3295 | else |
| 3296 | { |
| 3297 | this->ignore_gd_add_ = false; |
| 3298 | return false; |
| 3299 | } |
| 3300 | } |
| 3301 | |
| 3302 | if (view == NULL) |
| 3303 | return true; |
| 3304 | |
| 3305 | if (this->reloc_adjust_addr_ == view) |
| 3306 | view -= 4; |
| 3307 | |
| 3308 | typedef Sparc_relocate_functions<size, big_endian> Reloc; |
| 3309 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
| 3310 | |
| 3311 | // Pick the value to use for symbols defined in shared objects. |
| 3312 | Symbol_value<size> symval; |
| 3313 | if (gsym != NULL |
| 3314 | && gsym->use_plt_offset(Scan::get_reference_flags(r_type))) |
| 3315 | { |
| 3316 | elfcpp::Elf_Xword value; |
| 3317 | |
| 3318 | value = target->plt_address_for_global(gsym); |
| 3319 | |
| 3320 | symval.set_output_value(value); |
| 3321 | |
| 3322 | psymval = &symval; |
| 3323 | } |
| 3324 | else if (gsym == NULL && orig_is_ifunc) |
| 3325 | { |
| 3326 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| 3327 | if (object->local_has_plt_offset(r_sym)) |
| 3328 | { |
| 3329 | symval.set_output_value(target->plt_address_for_local(object, r_sym)); |
| 3330 | psymval = &symval; |
| 3331 | } |
| 3332 | } |
| 3333 | |
| 3334 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); |
| 3335 | |
| 3336 | // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT |
| 3337 | // pointer points to the beginning, not the end, of the table. |
| 3338 | // So we just use the plain offset. |
| 3339 | unsigned int got_offset = 0; |
| 3340 | bool gdop_valid = false; |
| 3341 | switch (r_type) |
| 3342 | { |
| 3343 | case elfcpp::R_SPARC_GOTDATA_OP: |
| 3344 | case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| 3345 | case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| 3346 | // If this is local, we did not create a GOT entry because we |
| 3347 | // intend to transform this into a GOT relative relocation. |
| 3348 | if (gsym == NULL |
| 3349 | || (gsym->is_defined() |
| 3350 | && !gsym->is_from_dynobj() |
| 3351 | && !gsym->is_preemptible() |
| 3352 | && !orig_is_ifunc)) |
| 3353 | { |
| 3354 | got_offset = psymval->value(object, addend) - target->got_address(); |
| 3355 | gdop_valid = true; |
| 3356 | break; |
| 3357 | } |
| 3358 | // Fall through. |
| 3359 | case elfcpp::R_SPARC_GOT10: |
| 3360 | case elfcpp::R_SPARC_GOT13: |
| 3361 | case elfcpp::R_SPARC_GOT22: |
| 3362 | if (gsym != NULL) |
| 3363 | { |
| 3364 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); |
| 3365 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD); |
| 3366 | } |
| 3367 | else |
| 3368 | { |
| 3369 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| 3370 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
| 3371 | got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); |
| 3372 | } |
| 3373 | break; |
| 3374 | |
| 3375 | default: |
| 3376 | break; |
| 3377 | } |
| 3378 | |
| 3379 | switch (r_type) |
| 3380 | { |
| 3381 | case elfcpp::R_SPARC_NONE: |
| 3382 | case elfcpp::R_SPARC_REGISTER: |
| 3383 | case elfcpp::R_SPARC_GNU_VTINHERIT: |
| 3384 | case elfcpp::R_SPARC_GNU_VTENTRY: |
| 3385 | break; |
| 3386 | |
| 3387 | case elfcpp::R_SPARC_8: |
| 3388 | Relocate_functions<size, big_endian>::rela8(view, object, |
| 3389 | psymval, addend); |
| 3390 | break; |
| 3391 | |
| 3392 | case elfcpp::R_SPARC_16: |
| 3393 | if (rela.get_r_offset() & 0x1) |
| 3394 | { |
| 3395 | // The assembler can sometimes emit unaligned relocations |
| 3396 | // for dwarf2 cfi directives. |
| 3397 | Reloc::ua16(view, object, psymval, addend); |
| 3398 | } |
| 3399 | else |
| 3400 | Relocate_functions<size, big_endian>::rela16(view, object, |
| 3401 | psymval, addend); |
| 3402 | break; |
| 3403 | |
| 3404 | case elfcpp::R_SPARC_32: |
| 3405 | if (!parameters->options().output_is_position_independent()) |
| 3406 | { |
| 3407 | if (rela.get_r_offset() & 0x3) |
| 3408 | { |
| 3409 | // The assembler can sometimes emit unaligned relocations |
| 3410 | // for dwarf2 cfi directives. |
| 3411 | Reloc::ua32(view, object, psymval, addend); |
| 3412 | } |
| 3413 | else |
| 3414 | Relocate_functions<size, big_endian>::rela32(view, object, |
| 3415 | psymval, addend); |
| 3416 | } |
| 3417 | break; |
| 3418 | |
| 3419 | case elfcpp::R_SPARC_DISP8: |
| 3420 | Reloc::disp8(view, object, psymval, addend, address); |
| 3421 | break; |
| 3422 | |
| 3423 | case elfcpp::R_SPARC_DISP16: |
| 3424 | Reloc::disp16(view, object, psymval, addend, address); |
| 3425 | break; |
| 3426 | |
| 3427 | case elfcpp::R_SPARC_DISP32: |
| 3428 | Reloc::disp32(view, object, psymval, addend, address); |
| 3429 | break; |
| 3430 | |
| 3431 | case elfcpp::R_SPARC_DISP64: |
| 3432 | Reloc::disp64(view, object, psymval, addend, address); |
| 3433 | break; |
| 3434 | |
| 3435 | case elfcpp::R_SPARC_WDISP30: |
| 3436 | case elfcpp::R_SPARC_WPLT30: |
| 3437 | Reloc::wdisp30(view, object, psymval, addend, address); |
| 3438 | if (target->may_relax()) |
| 3439 | relax_call(target, view, rela, view_size); |
| 3440 | break; |
| 3441 | |
| 3442 | case elfcpp::R_SPARC_WDISP22: |
| 3443 | Reloc::wdisp22(view, object, psymval, addend, address); |
| 3444 | break; |
| 3445 | |
| 3446 | case elfcpp::R_SPARC_WDISP19: |
| 3447 | Reloc::wdisp19(view, object, psymval, addend, address); |
| 3448 | break; |
| 3449 | |
| 3450 | case elfcpp::R_SPARC_WDISP16: |
| 3451 | Reloc::wdisp16(view, object, psymval, addend, address); |
| 3452 | break; |
| 3453 | |
| 3454 | case elfcpp::R_SPARC_WDISP10: |
| 3455 | Reloc::wdisp10(view, object, psymval, addend, address); |
| 3456 | break; |
| 3457 | |
| 3458 | case elfcpp::R_SPARC_HI22: |
| 3459 | Reloc::hi22(view, object, psymval, addend); |
| 3460 | break; |
| 3461 | |
| 3462 | case elfcpp::R_SPARC_22: |
| 3463 | Reloc::rela32_22(view, object, psymval, addend); |
| 3464 | break; |
| 3465 | |
| 3466 | case elfcpp::R_SPARC_13: |
| 3467 | Reloc::rela32_13(view, object, psymval, addend); |
| 3468 | break; |
| 3469 | |
| 3470 | case elfcpp::R_SPARC_LO10: |
| 3471 | Reloc::lo10(view, object, psymval, addend); |
| 3472 | break; |
| 3473 | |
| 3474 | case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| 3475 | if (gdop_valid) |
| 3476 | { |
| 3477 | Reloc::gdop_lox10(view, got_offset); |
| 3478 | break; |
| 3479 | } |
| 3480 | // Fall through. |
| 3481 | case elfcpp::R_SPARC_GOT10: |
| 3482 | Reloc::lo10(view, got_offset, addend); |
| 3483 | break; |
| 3484 | |
| 3485 | case elfcpp::R_SPARC_GOTDATA_OP: |
| 3486 | if (gdop_valid) |
| 3487 | { |
| 3488 | typedef typename elfcpp::Swap<32, true>::Valtype Insntype; |
| 3489 | Insntype* wv = reinterpret_cast<Insntype*>(view); |
| 3490 | Insntype val; |
| 3491 | |
| 3492 | // {ld,ldx} [%rs1 + %rs2], %rd --> add %rs1, %rs2, %rd |
| 3493 | val = elfcpp::Swap<32, true>::readval(wv); |
| 3494 | val = 0x80000000 | (val & 0x3e07c01f); |
| 3495 | elfcpp::Swap<32, true>::writeval(wv, val); |
| 3496 | } |
| 3497 | break; |
| 3498 | |
| 3499 | case elfcpp::R_SPARC_GOT13: |
| 3500 | Reloc::rela32_13(view, got_offset, addend); |
| 3501 | break; |
| 3502 | |
| 3503 | case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| 3504 | if (gdop_valid) |
| 3505 | { |
| 3506 | Reloc::gdop_hix22(view, got_offset); |
| 3507 | break; |
| 3508 | } |
| 3509 | // Fall through. |
| 3510 | case elfcpp::R_SPARC_GOT22: |
| 3511 | Reloc::hi22(view, got_offset, addend); |
| 3512 | break; |
| 3513 | |
| 3514 | case elfcpp::R_SPARC_PC10: |
| 3515 | Reloc::pc10(view, object, psymval, addend, address); |
| 3516 | break; |
| 3517 | |
| 3518 | case elfcpp::R_SPARC_PC22: |
| 3519 | Reloc::pc22(view, object, psymval, addend, address); |
| 3520 | break; |
| 3521 | |
| 3522 | case elfcpp::R_SPARC_TLS_DTPOFF32: |
| 3523 | case elfcpp::R_SPARC_UA32: |
| 3524 | Reloc::ua32(view, object, psymval, addend); |
| 3525 | break; |
| 3526 | |
| 3527 | case elfcpp::R_SPARC_PLT64: |
| 3528 | Relocate_functions<size, big_endian>::rela64(view, object, |
| 3529 | psymval, addend); |
| 3530 | break; |
| 3531 | |
| 3532 | case elfcpp::R_SPARC_PLT32: |
| 3533 | Relocate_functions<size, big_endian>::rela32(view, object, |
| 3534 | psymval, addend); |
| 3535 | break; |
| 3536 | |
| 3537 | case elfcpp::R_SPARC_HIPLT22: |
| 3538 | Reloc::hi22(view, object, psymval, addend); |
| 3539 | break; |
| 3540 | |
| 3541 | case elfcpp::R_SPARC_LOPLT10: |
| 3542 | Reloc::lo10(view, object, psymval, addend); |
| 3543 | break; |
| 3544 | |
| 3545 | case elfcpp::R_SPARC_PCPLT32: |
| 3546 | Reloc::disp32(view, object, psymval, addend, address); |
| 3547 | break; |
| 3548 | |
| 3549 | case elfcpp::R_SPARC_PCPLT22: |
| 3550 | Reloc::pcplt22(view, object, psymval, addend, address); |
| 3551 | break; |
| 3552 | |
| 3553 | case elfcpp::R_SPARC_PCPLT10: |
| 3554 | Reloc::lo10(view, object, psymval, addend, address); |
| 3555 | break; |
| 3556 | |
| 3557 | case elfcpp::R_SPARC_64: |
| 3558 | if (!parameters->options().output_is_position_independent()) |
| 3559 | { |
| 3560 | if (rela.get_r_offset() & 0x7) |
| 3561 | { |
| 3562 | // The assembler can sometimes emit unaligned relocations |
| 3563 | // for dwarf2 cfi directives. |
| 3564 | Reloc::ua64(view, object, psymval, addend); |
| 3565 | } |
| 3566 | else |
| 3567 | Relocate_functions<size, big_endian>::rela64(view, object, |
| 3568 | psymval, addend); |
| 3569 | } |
| 3570 | break; |
| 3571 | |
| 3572 | case elfcpp::R_SPARC_OLO10: |
| 3573 | { |
| 3574 | unsigned int addend2 = rela.get_r_info() & 0xffffffff; |
| 3575 | addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000; |
| 3576 | Reloc::olo10(view, object, psymval, addend, addend2); |
| 3577 | } |
| 3578 | break; |
| 3579 | |
| 3580 | case elfcpp::R_SPARC_HH22: |
| 3581 | Reloc::hh22(view, object, psymval, addend); |
| 3582 | break; |
| 3583 | |
| 3584 | case elfcpp::R_SPARC_PC_HH22: |
| 3585 | Reloc::pc_hh22(view, object, psymval, addend, address); |
| 3586 | break; |
| 3587 | |
| 3588 | case elfcpp::R_SPARC_HM10: |
| 3589 | Reloc::hm10(view, object, psymval, addend); |
| 3590 | break; |
| 3591 | |
| 3592 | case elfcpp::R_SPARC_PC_HM10: |
| 3593 | Reloc::pc_hm10(view, object, psymval, addend, address); |
| 3594 | break; |
| 3595 | |
| 3596 | case elfcpp::R_SPARC_LM22: |
| 3597 | Reloc::hi22(view, object, psymval, addend); |
| 3598 | break; |
| 3599 | |
| 3600 | case elfcpp::R_SPARC_PC_LM22: |
| 3601 | Reloc::pcplt22(view, object, psymval, addend, address); |
| 3602 | break; |
| 3603 | |
| 3604 | case elfcpp::R_SPARC_11: |
| 3605 | Reloc::rela32_11(view, object, psymval, addend); |
| 3606 | break; |
| 3607 | |
| 3608 | case elfcpp::R_SPARC_10: |
| 3609 | Reloc::rela32_10(view, object, psymval, addend); |
| 3610 | break; |
| 3611 | |
| 3612 | case elfcpp::R_SPARC_7: |
| 3613 | Reloc::rela32_7(view, object, psymval, addend); |
| 3614 | break; |
| 3615 | |
| 3616 | case elfcpp::R_SPARC_6: |
| 3617 | Reloc::rela32_6(view, object, psymval, addend); |
| 3618 | break; |
| 3619 | |
| 3620 | case elfcpp::R_SPARC_5: |
| 3621 | Reloc::rela32_5(view, object, psymval, addend); |
| 3622 | break; |
| 3623 | |
| 3624 | case elfcpp::R_SPARC_HIX22: |
| 3625 | Reloc::hix22(view, object, psymval, addend); |
| 3626 | break; |
| 3627 | |
| 3628 | case elfcpp::R_SPARC_LOX10: |
| 3629 | Reloc::lox10(view, object, psymval, addend); |
| 3630 | break; |
| 3631 | |
| 3632 | case elfcpp::R_SPARC_H34: |
| 3633 | Reloc::h34(view, object, psymval, addend); |
| 3634 | break; |
| 3635 | |
| 3636 | case elfcpp::R_SPARC_H44: |
| 3637 | Reloc::h44(view, object, psymval, addend); |
| 3638 | break; |
| 3639 | |
| 3640 | case elfcpp::R_SPARC_M44: |
| 3641 | Reloc::m44(view, object, psymval, addend); |
| 3642 | break; |
| 3643 | |
| 3644 | case elfcpp::R_SPARC_L44: |
| 3645 | Reloc::l44(view, object, psymval, addend); |
| 3646 | break; |
| 3647 | |
| 3648 | case elfcpp::R_SPARC_TLS_DTPOFF64: |
| 3649 | case elfcpp::R_SPARC_UA64: |
| 3650 | Reloc::ua64(view, object, psymval, addend); |
| 3651 | break; |
| 3652 | |
| 3653 | case elfcpp::R_SPARC_UA16: |
| 3654 | Reloc::ua16(view, object, psymval, addend); |
| 3655 | break; |
| 3656 | |
| 3657 | case elfcpp::R_SPARC_TLS_GD_HI22: |
| 3658 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 3659 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 3660 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 3661 | case elfcpp::R_SPARC_TLS_LDM_HI22: |
| 3662 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 3663 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 3664 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 3665 | case elfcpp::R_SPARC_TLS_LDO_HIX22: |
| 3666 | case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| 3667 | case elfcpp::R_SPARC_TLS_LDO_ADD: |
| 3668 | case elfcpp::R_SPARC_TLS_IE_HI22: |
| 3669 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 3670 | case elfcpp::R_SPARC_TLS_IE_LD: |
| 3671 | case elfcpp::R_SPARC_TLS_IE_LDX: |
| 3672 | case elfcpp::R_SPARC_TLS_IE_ADD: |
| 3673 | case elfcpp::R_SPARC_TLS_LE_HIX22: |
| 3674 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 3675 | this->relocate_tls(relinfo, target, relnum, rela, |
| 3676 | r_type, gsym, psymval, view, |
| 3677 | address, view_size); |
| 3678 | break; |
| 3679 | |
| 3680 | case elfcpp::R_SPARC_COPY: |
| 3681 | case elfcpp::R_SPARC_GLOB_DAT: |
| 3682 | case elfcpp::R_SPARC_JMP_SLOT: |
| 3683 | case elfcpp::R_SPARC_JMP_IREL: |
| 3684 | case elfcpp::R_SPARC_RELATIVE: |
| 3685 | case elfcpp::R_SPARC_IRELATIVE: |
| 3686 | // These are outstanding tls relocs, which are unexpected when |
| 3687 | // linking. |
| 3688 | case elfcpp::R_SPARC_TLS_DTPMOD64: |
| 3689 | case elfcpp::R_SPARC_TLS_DTPMOD32: |
| 3690 | case elfcpp::R_SPARC_TLS_TPOFF64: |
| 3691 | case elfcpp::R_SPARC_TLS_TPOFF32: |
| 3692 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 3693 | _("unexpected reloc %u in object file"), |
| 3694 | r_type); |
| 3695 | break; |
| 3696 | |
| 3697 | default: |
| 3698 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 3699 | _("unsupported reloc %u"), |
| 3700 | r_type); |
| 3701 | break; |
| 3702 | } |
| 3703 | |
| 3704 | return true; |
| 3705 | } |
| 3706 | |
| 3707 | // Perform a TLS relocation. |
| 3708 | |
| 3709 | template<int size, bool big_endian> |
| 3710 | inline void |
| 3711 | Target_sparc<size, big_endian>::Relocate::relocate_tls( |
| 3712 | const Relocate_info<size, big_endian>* relinfo, |
| 3713 | Target_sparc<size, big_endian>* target, |
| 3714 | size_t relnum, |
| 3715 | const elfcpp::Rela<size, big_endian>& rela, |
| 3716 | unsigned int r_type, |
| 3717 | const Sized_symbol<size>* gsym, |
| 3718 | const Symbol_value<size>* psymval, |
| 3719 | unsigned char* view, |
| 3720 | typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 3721 | section_size_type) |
| 3722 | { |
| 3723 | Output_segment* tls_segment = relinfo->layout->tls_segment(); |
| 3724 | typedef Sparc_relocate_functions<size, big_endian> Reloc; |
| 3725 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
| 3726 | typedef typename elfcpp::Swap<32, true>::Valtype Insntype; |
| 3727 | |
| 3728 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); |
| 3729 | typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); |
| 3730 | |
| 3731 | const bool is_final = |
| 3732 | (gsym == NULL |
| 3733 | ? !parameters->options().shared() |
| 3734 | : gsym->final_value_is_known()); |
| 3735 | const tls::Tls_optimization optimized_type |
| 3736 | = optimize_tls_reloc(is_final, r_type); |
| 3737 | |
| 3738 | switch (r_type) |
| 3739 | { |
| 3740 | case elfcpp::R_SPARC_TLS_GD_HI22: |
| 3741 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 3742 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 3743 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 3744 | if (optimized_type == tls::TLSOPT_TO_LE) |
| 3745 | { |
| 3746 | Insntype* wv = reinterpret_cast<Insntype*>(view); |
| 3747 | Insntype val; |
| 3748 | |
| 3749 | value -= tls_segment->memsz(); |
| 3750 | |
| 3751 | switch (r_type) |
| 3752 | { |
| 3753 | case elfcpp::R_SPARC_TLS_GD_HI22: |
| 3754 | // TLS_GD_HI22 --> TLS_LE_HIX22 |
| 3755 | Reloc::hix22(view, value, addend); |
| 3756 | break; |
| 3757 | |
| 3758 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 3759 | // TLS_GD_LO10 --> TLS_LE_LOX10 |
| 3760 | Reloc::lox10(view, value, addend); |
| 3761 | break; |
| 3762 | |
| 3763 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 3764 | // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3 |
| 3765 | val = elfcpp::Swap<32, true>::readval(wv); |
| 3766 | val = (val & ~0x7c000) | 0x1c000; |
| 3767 | elfcpp::Swap<32, true>::writeval(wv, val); |
| 3768 | break; |
| 3769 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 3770 | // call __tls_get_addr --> nop |
| 3771 | elfcpp::Swap<32, true>::writeval(wv, sparc_nop); |
| 3772 | break; |
| 3773 | } |
| 3774 | break; |
| 3775 | } |
| 3776 | else |
| 3777 | { |
| 3778 | unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE |
| 3779 | ? GOT_TYPE_TLS_OFFSET |
| 3780 | : GOT_TYPE_TLS_PAIR); |
| 3781 | if (gsym != NULL) |
| 3782 | { |
| 3783 | gold_assert(gsym->has_got_offset(got_type)); |
| 3784 | value = gsym->got_offset(got_type); |
| 3785 | } |
| 3786 | else |
| 3787 | { |
| 3788 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| 3789 | gold_assert(object->local_has_got_offset(r_sym, got_type)); |
| 3790 | value = object->local_got_offset(r_sym, got_type); |
| 3791 | } |
| 3792 | if (optimized_type == tls::TLSOPT_TO_IE) |
| 3793 | { |
| 3794 | Insntype* wv = reinterpret_cast<Insntype*>(view); |
| 3795 | Insntype val; |
| 3796 | |
| 3797 | switch (r_type) |
| 3798 | { |
| 3799 | case elfcpp::R_SPARC_TLS_GD_HI22: |
| 3800 | // TLS_GD_HI22 --> TLS_IE_HI22 |
| 3801 | Reloc::hi22(view, value, addend); |
| 3802 | break; |
| 3803 | |
| 3804 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 3805 | // TLS_GD_LO10 --> TLS_IE_LO10 |
| 3806 | Reloc::lo10(view, value, addend); |
| 3807 | break; |
| 3808 | |
| 3809 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 3810 | // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3 |
| 3811 | val = elfcpp::Swap<32, true>::readval(wv); |
| 3812 | |
| 3813 | if (size == 64) |
| 3814 | val |= 0xc0580000; |
| 3815 | else |
| 3816 | val |= 0xc0000000; |
| 3817 | |
| 3818 | elfcpp::Swap<32, true>::writeval(wv, val); |
| 3819 | break; |
| 3820 | |
| 3821 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 3822 | // The compiler can put the TLS_GD_ADD instruction |
| 3823 | // into the delay slot of the call. If so, we need |
| 3824 | // to transpose the two instructions so that the |
| 3825 | // new sequence works properly. |
| 3826 | // |
| 3827 | // The test we use is if the instruction in the |
| 3828 | // delay slot is an add with destination register |
| 3829 | // equal to %o0 |
| 3830 | val = elfcpp::Swap<32, true>::readval(wv + 1); |
| 3831 | if ((val & 0x81f80000) == 0x80000000 |
| 3832 | && ((val >> 25) & 0x1f) == 0x8) |
| 3833 | { |
| 3834 | if (size == 64) |
| 3835 | val |= 0xc0580000; |
| 3836 | else |
| 3837 | val |= 0xc0000000; |
| 3838 | |
| 3839 | elfcpp::Swap<32, true>::writeval(wv, val); |
| 3840 | |
| 3841 | wv += 1; |
| 3842 | this->ignore_gd_add_ = true; |
| 3843 | } |
| 3844 | else |
| 3845 | { |
| 3846 | // Even if the delay slot isn't the TLS_GD_ADD |
| 3847 | // instruction, we still have to handle the case |
| 3848 | // where it sets up %o0 in some other way. |
| 3849 | elfcpp::Swap<32, true>::writeval(wv, val); |
| 3850 | wv += 1; |
| 3851 | this->reloc_adjust_addr_ = view + 4; |
| 3852 | } |
| 3853 | // call __tls_get_addr --> add %g7, %o0, %o0 |
| 3854 | elfcpp::Swap<32, true>::writeval(wv, 0x9001c008); |
| 3855 | break; |
| 3856 | } |
| 3857 | break; |
| 3858 | } |
| 3859 | else if (optimized_type == tls::TLSOPT_NONE) |
| 3860 | { |
| 3861 | switch (r_type) |
| 3862 | { |
| 3863 | case elfcpp::R_SPARC_TLS_GD_HI22: |
| 3864 | Reloc::hi22(view, value, addend); |
| 3865 | break; |
| 3866 | case elfcpp::R_SPARC_TLS_GD_LO10: |
| 3867 | Reloc::lo10(view, value, addend); |
| 3868 | break; |
| 3869 | case elfcpp::R_SPARC_TLS_GD_ADD: |
| 3870 | break; |
| 3871 | case elfcpp::R_SPARC_TLS_GD_CALL: |
| 3872 | { |
| 3873 | Symbol_value<size> symval; |
| 3874 | elfcpp::Elf_Xword value; |
| 3875 | Symbol* tsym; |
| 3876 | |
| 3877 | tsym = target->tls_get_addr_sym_; |
| 3878 | gold_assert(tsym); |
| 3879 | value = (target->plt_section()->address() + |
| 3880 | tsym->plt_offset()); |
| 3881 | symval.set_output_value(value); |
| 3882 | Reloc::wdisp30(view, object, &symval, addend, address); |
| 3883 | } |
| 3884 | break; |
| 3885 | } |
| 3886 | break; |
| 3887 | } |
| 3888 | } |
| 3889 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 3890 | _("unsupported reloc %u"), |
| 3891 | r_type); |
| 3892 | break; |
| 3893 | |
| 3894 | case elfcpp::R_SPARC_TLS_LDM_HI22: |
| 3895 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 3896 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 3897 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 3898 | if (optimized_type == tls::TLSOPT_TO_LE) |
| 3899 | { |
| 3900 | Insntype* wv = reinterpret_cast<Insntype*>(view); |
| 3901 | |
| 3902 | switch (r_type) |
| 3903 | { |
| 3904 | case elfcpp::R_SPARC_TLS_LDM_HI22: |
| 3905 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 3906 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 3907 | elfcpp::Swap<32, true>::writeval(wv, sparc_nop); |
| 3908 | break; |
| 3909 | |
| 3910 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 3911 | elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0); |
| 3912 | break; |
| 3913 | } |
| 3914 | break; |
| 3915 | } |
| 3916 | else if (optimized_type == tls::TLSOPT_NONE) |
| 3917 | { |
| 3918 | // Relocate the field with the offset of the GOT entry for |
| 3919 | // the module index. |
| 3920 | unsigned int got_offset; |
| 3921 | |
| 3922 | got_offset = target->got_mod_index_entry(NULL, NULL, NULL); |
| 3923 | switch (r_type) |
| 3924 | { |
| 3925 | case elfcpp::R_SPARC_TLS_LDM_HI22: |
| 3926 | Reloc::hi22(view, got_offset, addend); |
| 3927 | break; |
| 3928 | case elfcpp::R_SPARC_TLS_LDM_LO10: |
| 3929 | Reloc::lo10(view, got_offset, addend); |
| 3930 | break; |
| 3931 | case elfcpp::R_SPARC_TLS_LDM_ADD: |
| 3932 | break; |
| 3933 | case elfcpp::R_SPARC_TLS_LDM_CALL: |
| 3934 | { |
| 3935 | Symbol_value<size> symval; |
| 3936 | elfcpp::Elf_Xword value; |
| 3937 | Symbol* tsym; |
| 3938 | |
| 3939 | tsym = target->tls_get_addr_sym_; |
| 3940 | gold_assert(tsym); |
| 3941 | value = (target->plt_section()->address() + |
| 3942 | tsym->plt_offset()); |
| 3943 | symval.set_output_value(value); |
| 3944 | Reloc::wdisp30(view, object, &symval, addend, address); |
| 3945 | } |
| 3946 | break; |
| 3947 | } |
| 3948 | break; |
| 3949 | } |
| 3950 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 3951 | _("unsupported reloc %u"), |
| 3952 | r_type); |
| 3953 | break; |
| 3954 | |
| 3955 | // These relocs can appear in debugging sections, in which case |
| 3956 | // we won't see the TLS_LDM relocs. The local_dynamic_type |
| 3957 | // field tells us this. |
| 3958 | case elfcpp::R_SPARC_TLS_LDO_HIX22: |
| 3959 | if (optimized_type == tls::TLSOPT_TO_LE) |
| 3960 | { |
| 3961 | value -= tls_segment->memsz(); |
| 3962 | Reloc::hix22(view, value, addend); |
| 3963 | } |
| 3964 | else |
| 3965 | Reloc::ldo_hix22(view, value, addend); |
| 3966 | break; |
| 3967 | case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| 3968 | if (optimized_type == tls::TLSOPT_TO_LE) |
| 3969 | { |
| 3970 | value -= tls_segment->memsz(); |
| 3971 | Reloc::lox10(view, value, addend); |
| 3972 | } |
| 3973 | else |
| 3974 | Reloc::ldo_lox10(view, value, addend); |
| 3975 | break; |
| 3976 | case elfcpp::R_SPARC_TLS_LDO_ADD: |
| 3977 | if (optimized_type == tls::TLSOPT_TO_LE) |
| 3978 | { |
| 3979 | Insntype* wv = reinterpret_cast<Insntype*>(view); |
| 3980 | Insntype val; |
| 3981 | |
| 3982 | // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3 |
| 3983 | val = elfcpp::Swap<32, true>::readval(wv); |
| 3984 | val = (val & ~0x7c000) | 0x1c000; |
| 3985 | elfcpp::Swap<32, true>::writeval(wv, val); |
| 3986 | } |
| 3987 | break; |
| 3988 | |
| 3989 | // When optimizing IE --> LE, the only relocation that is handled |
| 3990 | // differently is R_SPARC_TLS_IE_LD, it is rewritten from |
| 3991 | // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is |
| 3992 | // rs2 and rd are the same. |
| 3993 | case elfcpp::R_SPARC_TLS_IE_LD: |
| 3994 | case elfcpp::R_SPARC_TLS_IE_LDX: |
| 3995 | if (optimized_type == tls::TLSOPT_TO_LE) |
| 3996 | { |
| 3997 | Insntype* wv = reinterpret_cast<Insntype*>(view); |
| 3998 | Insntype val = elfcpp::Swap<32, true>::readval(wv); |
| 3999 | Insntype rs2 = val & 0x1f; |
| 4000 | Insntype rd = (val >> 25) & 0x1f; |
| 4001 | |
| 4002 | if (rs2 == rd) |
| 4003 | val = sparc_nop; |
| 4004 | else |
| 4005 | val = sparc_mov | (val & 0x3e00001f); |
| 4006 | |
| 4007 | elfcpp::Swap<32, true>::writeval(wv, val); |
| 4008 | } |
| 4009 | break; |
| 4010 | |
| 4011 | case elfcpp::R_SPARC_TLS_IE_HI22: |
| 4012 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 4013 | if (optimized_type == tls::TLSOPT_TO_LE) |
| 4014 | { |
| 4015 | value -= tls_segment->memsz(); |
| 4016 | switch (r_type) |
| 4017 | { |
| 4018 | case elfcpp::R_SPARC_TLS_IE_HI22: |
| 4019 | // IE_HI22 --> LE_HIX22 |
| 4020 | Reloc::hix22(view, value, addend); |
| 4021 | break; |
| 4022 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 4023 | // IE_LO10 --> LE_LOX10 |
| 4024 | Reloc::lox10(view, value, addend); |
| 4025 | break; |
| 4026 | } |
| 4027 | break; |
| 4028 | } |
| 4029 | else if (optimized_type == tls::TLSOPT_NONE) |
| 4030 | { |
| 4031 | // Relocate the field with the offset of the GOT entry for |
| 4032 | // the tp-relative offset of the symbol. |
| 4033 | if (gsym != NULL) |
| 4034 | { |
| 4035 | gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)); |
| 4036 | value = gsym->got_offset(GOT_TYPE_TLS_OFFSET); |
| 4037 | } |
| 4038 | else |
| 4039 | { |
| 4040 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| 4041 | gold_assert(object->local_has_got_offset(r_sym, |
| 4042 | GOT_TYPE_TLS_OFFSET)); |
| 4043 | value = object->local_got_offset(r_sym, |
| 4044 | GOT_TYPE_TLS_OFFSET); |
| 4045 | } |
| 4046 | switch (r_type) |
| 4047 | { |
| 4048 | case elfcpp::R_SPARC_TLS_IE_HI22: |
| 4049 | Reloc::hi22(view, value, addend); |
| 4050 | break; |
| 4051 | case elfcpp::R_SPARC_TLS_IE_LO10: |
| 4052 | Reloc::lo10(view, value, addend); |
| 4053 | break; |
| 4054 | } |
| 4055 | break; |
| 4056 | } |
| 4057 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 4058 | _("unsupported reloc %u"), |
| 4059 | r_type); |
| 4060 | break; |
| 4061 | |
| 4062 | case elfcpp::R_SPARC_TLS_IE_ADD: |
| 4063 | // This seems to be mainly so that we can find the addition |
| 4064 | // instruction if there is one. There doesn't seem to be any |
| 4065 | // actual relocation to apply. |
| 4066 | break; |
| 4067 | |
| 4068 | case elfcpp::R_SPARC_TLS_LE_HIX22: |
| 4069 | // If we're creating a shared library, a dynamic relocation will |
| 4070 | // have been created for this location, so do not apply it now. |
| 4071 | if (!parameters->options().shared()) |
| 4072 | { |
| 4073 | value -= tls_segment->memsz(); |
| 4074 | Reloc::hix22(view, value, addend); |
| 4075 | } |
| 4076 | break; |
| 4077 | |
| 4078 | case elfcpp::R_SPARC_TLS_LE_LOX10: |
| 4079 | // If we're creating a shared library, a dynamic relocation will |
| 4080 | // have been created for this location, so do not apply it now. |
| 4081 | if (!parameters->options().shared()) |
| 4082 | { |
| 4083 | value -= tls_segment->memsz(); |
| 4084 | Reloc::lox10(view, value, addend); |
| 4085 | } |
| 4086 | break; |
| 4087 | } |
| 4088 | } |
| 4089 | |
| 4090 | // Relax a call instruction. |
| 4091 | |
| 4092 | template<int size, bool big_endian> |
| 4093 | inline void |
| 4094 | Target_sparc<size, big_endian>::Relocate::relax_call( |
| 4095 | Target_sparc<size, big_endian>* target, |
| 4096 | unsigned char* view, |
| 4097 | const elfcpp::Rela<size, big_endian>& rela, |
| 4098 | section_size_type view_size) |
| 4099 | { |
| 4100 | typedef typename elfcpp::Swap<32, true>::Valtype Insntype; |
| 4101 | Insntype *wv = reinterpret_cast<Insntype*>(view); |
| 4102 | Insntype call_insn, delay_insn, set_insn; |
| 4103 | uint32_t op3, reg, off; |
| 4104 | |
| 4105 | // This code tries to relax call instructions that meet |
| 4106 | // certain criteria. |
| 4107 | // |
| 4108 | // The first criteria is that the call must be such that the return |
| 4109 | // address which the call writes into %o7 is unused. Two sequences |
| 4110 | // meet this criteria, and are used to implement tail calls. |
| 4111 | // |
| 4112 | // Leaf function tail call: |
| 4113 | // |
| 4114 | // or %o7, %g0, %ANY_REG |
| 4115 | // call FUNC |
| 4116 | // or %ANY_REG, %g0, %o7 |
| 4117 | // |
| 4118 | // Non-leaf function tail call: |
| 4119 | // |
| 4120 | // call FUNC |
| 4121 | // restore |
| 4122 | // |
| 4123 | // The second criteria is that the call destination is close. If |
| 4124 | // the displacement can fit in a signed 22-bit immediate field of a |
| 4125 | // pre-V9 branch, we can do it. If we are generating a 64-bit |
| 4126 | // object or a 32-bit object with ELF machine type EF_SPARC32PLUS, |
| 4127 | // and the displacement fits in a signed 19-bit immediate field, |
| 4128 | // then we can use a V9 branch. |
| 4129 | |
| 4130 | // Make sure the delay instruction can be safely accessed. |
| 4131 | if (rela.get_r_offset() + 8 > view_size) |
| 4132 | return; |
| 4133 | |
| 4134 | call_insn = elfcpp::Swap<32, true>::readval(wv); |
| 4135 | delay_insn = elfcpp::Swap<32, true>::readval(wv + 1); |
| 4136 | |
| 4137 | // Make sure it is really a call instruction. |
| 4138 | if (((call_insn >> 30) & 0x3) != 1) |
| 4139 | return; |
| 4140 | |
| 4141 | if (((delay_insn >> 30) & 0x3) != 2) |
| 4142 | return; |
| 4143 | |
| 4144 | // Accept only a restore or an integer arithmetic operation whose |
| 4145 | // sole side effect is to write the %o7 register (and perhaps set |
| 4146 | // the condition codes, which are considered clobbered across |
| 4147 | // function calls). |
| 4148 | // |
| 4149 | // For example, we don't want to match a tagged addition or |
| 4150 | // subtraction. We also don't want to match something like a |
| 4151 | // divide. |
| 4152 | // |
| 4153 | // Specifically we accept add{,cc}, and{,cc}, or{,cc}, |
| 4154 | // xor{,cc}, sub{,cc}, andn{,cc}, orn{,cc}, and xnor{,cc}. |
| 4155 | |
| 4156 | op3 = (delay_insn >> 19) & 0x3f; |
| 4157 | reg = (delay_insn >> 25) & 0x1f; |
| 4158 | if (op3 != 0x3d |
| 4159 | && ((op3 & 0x28) != 0 || reg != 15)) |
| 4160 | return; |
| 4161 | |
| 4162 | // For non-restore instructions, make sure %o7 isn't |
| 4163 | // an input. |
| 4164 | if (op3 != 0x3d) |
| 4165 | { |
| 4166 | // First check RS1 |
| 4167 | reg = (delay_insn >> 14) & 0x1f; |
| 4168 | if (reg == 15) |
| 4169 | return; |
| 4170 | |
| 4171 | // And if non-immediate, check RS2 |
| 4172 | if (((delay_insn >> 13) & 1) == 0) |
| 4173 | { |
| 4174 | reg = (delay_insn & 0x1f); |
| 4175 | if (reg == 15) |
| 4176 | return; |
| 4177 | } |
| 4178 | } |
| 4179 | |
| 4180 | // Now check the branch distance. We are called after the |
| 4181 | // call has been relocated, so we just have to peek at the |
| 4182 | // offset contained in the instruction. |
| 4183 | off = call_insn & 0x3fffffff; |
| 4184 | if ((off & 0x3fe00000) != 0 |
| 4185 | && (off & 0x3fe00000) != 0x3fe00000) |
| 4186 | return; |
| 4187 | |
| 4188 | if ((size == 64 || target->elf_machine_ == elfcpp::EM_SPARC32PLUS) |
| 4189 | && ((off & 0x3c0000) == 0 |
| 4190 | || (off & 0x3c0000) == 0x3c0000)) |
| 4191 | { |
| 4192 | // ba,pt %xcc, FUNC |
| 4193 | call_insn = 0x10680000 | (off & 0x07ffff); |
| 4194 | } |
| 4195 | else |
| 4196 | { |
| 4197 | // ba FUNC |
| 4198 | call_insn = 0x10800000 | (off & 0x3fffff); |
| 4199 | } |
| 4200 | elfcpp::Swap<32, true>::writeval(wv, call_insn); |
| 4201 | |
| 4202 | // See if we can NOP out the delay slot instruction. We peek |
| 4203 | // at the instruction before the call to make sure we're dealing |
| 4204 | // with exactly the: |
| 4205 | // |
| 4206 | // or %o7, %g0, %ANY_REG |
| 4207 | // call |
| 4208 | // or %ANY_REG, %g0, %o7 |
| 4209 | // |
| 4210 | // case. Otherwise this might be a tricky piece of hand written |
| 4211 | // assembler calculating %o7 in some non-trivial way, and therefore |
| 4212 | // we can't be sure that NOP'ing out the delay slot is safe. |
| 4213 | if (op3 == 0x02 |
| 4214 | && rela.get_r_offset() >= 4) |
| 4215 | { |
| 4216 | if ((delay_insn & ~(0x1f << 14)) != 0x9e100000) |
| 4217 | return; |
| 4218 | |
| 4219 | set_insn = elfcpp::Swap<32, true>::readval(wv - 1); |
| 4220 | if ((set_insn & ~(0x1f << 25)) != 0x8013c000) |
| 4221 | return; |
| 4222 | |
| 4223 | reg = (set_insn >> 25) & 0x1f; |
| 4224 | if (reg == 0 || reg == 15) |
| 4225 | return; |
| 4226 | if (reg != ((delay_insn >> 14) & 0x1f)) |
| 4227 | return; |
| 4228 | |
| 4229 | // All tests pass, nop it out. |
| 4230 | elfcpp::Swap<32, true>::writeval(wv + 1, sparc_nop); |
| 4231 | } |
| 4232 | } |
| 4233 | |
| 4234 | // Relocate section data. |
| 4235 | |
| 4236 | template<int size, bool big_endian> |
| 4237 | void |
| 4238 | Target_sparc<size, big_endian>::relocate_section( |
| 4239 | const Relocate_info<size, big_endian>* relinfo, |
| 4240 | unsigned int sh_type, |
| 4241 | const unsigned char* prelocs, |
| 4242 | size_t reloc_count, |
| 4243 | Output_section* output_section, |
| 4244 | bool needs_special_offset_handling, |
| 4245 | unsigned char* view, |
| 4246 | typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 4247 | section_size_type view_size, |
| 4248 | const Reloc_symbol_changes* reloc_symbol_changes) |
| 4249 | { |
| 4250 | typedef Target_sparc<size, big_endian> Sparc; |
| 4251 | typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate; |
| 4252 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 4253 | Classify_reloc; |
| 4254 | |
| 4255 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 4256 | |
| 4257 | gold::relocate_section<size, big_endian, Sparc, Sparc_relocate, |
| 4258 | gold::Default_comdat_behavior, Classify_reloc>( |
| 4259 | relinfo, |
| 4260 | this, |
| 4261 | prelocs, |
| 4262 | reloc_count, |
| 4263 | output_section, |
| 4264 | needs_special_offset_handling, |
| 4265 | view, |
| 4266 | address, |
| 4267 | view_size, |
| 4268 | reloc_symbol_changes); |
| 4269 | } |
| 4270 | |
| 4271 | // Scan the relocs during a relocatable link. |
| 4272 | |
| 4273 | template<int size, bool big_endian> |
| 4274 | void |
| 4275 | Target_sparc<size, big_endian>::scan_relocatable_relocs( |
| 4276 | Symbol_table* symtab, |
| 4277 | Layout* layout, |
| 4278 | Sized_relobj_file<size, big_endian>* object, |
| 4279 | unsigned int data_shndx, |
| 4280 | unsigned int sh_type, |
| 4281 | const unsigned char* prelocs, |
| 4282 | size_t reloc_count, |
| 4283 | Output_section* output_section, |
| 4284 | bool needs_special_offset_handling, |
| 4285 | size_t local_symbol_count, |
| 4286 | const unsigned char* plocal_symbols, |
| 4287 | Relocatable_relocs* rr) |
| 4288 | { |
| 4289 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 4290 | Classify_reloc; |
| 4291 | typedef gold::Default_scan_relocatable_relocs<Classify_reloc> |
| 4292 | Scan_relocatable_relocs; |
| 4293 | |
| 4294 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 4295 | |
| 4296 | gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>( |
| 4297 | symtab, |
| 4298 | layout, |
| 4299 | object, |
| 4300 | data_shndx, |
| 4301 | prelocs, |
| 4302 | reloc_count, |
| 4303 | output_section, |
| 4304 | needs_special_offset_handling, |
| 4305 | local_symbol_count, |
| 4306 | plocal_symbols, |
| 4307 | rr); |
| 4308 | } |
| 4309 | |
| 4310 | // Scan the relocs for --emit-relocs. |
| 4311 | |
| 4312 | template<int size, bool big_endian> |
| 4313 | void |
| 4314 | Target_sparc<size, big_endian>::emit_relocs_scan( |
| 4315 | Symbol_table* symtab, |
| 4316 | Layout* layout, |
| 4317 | Sized_relobj_file<size, big_endian>* object, |
| 4318 | unsigned int data_shndx, |
| 4319 | unsigned int sh_type, |
| 4320 | const unsigned char* prelocs, |
| 4321 | size_t reloc_count, |
| 4322 | Output_section* output_section, |
| 4323 | bool needs_special_offset_handling, |
| 4324 | size_t local_symbol_count, |
| 4325 | const unsigned char* plocal_syms, |
| 4326 | Relocatable_relocs* rr) |
| 4327 | { |
| 4328 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 4329 | Classify_reloc; |
| 4330 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> |
| 4331 | Emit_relocs_strategy; |
| 4332 | |
| 4333 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 4334 | |
| 4335 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( |
| 4336 | symtab, |
| 4337 | layout, |
| 4338 | object, |
| 4339 | data_shndx, |
| 4340 | prelocs, |
| 4341 | reloc_count, |
| 4342 | output_section, |
| 4343 | needs_special_offset_handling, |
| 4344 | local_symbol_count, |
| 4345 | plocal_syms, |
| 4346 | rr); |
| 4347 | } |
| 4348 | |
| 4349 | // Emit relocations for a section. |
| 4350 | |
| 4351 | template<int size, bool big_endian> |
| 4352 | void |
| 4353 | Target_sparc<size, big_endian>::relocate_relocs( |
| 4354 | const Relocate_info<size, big_endian>* relinfo, |
| 4355 | unsigned int sh_type, |
| 4356 | const unsigned char* prelocs, |
| 4357 | size_t reloc_count, |
| 4358 | Output_section* output_section, |
| 4359 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
| 4360 | unsigned char* view, |
| 4361 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, |
| 4362 | section_size_type view_size, |
| 4363 | unsigned char* reloc_view, |
| 4364 | section_size_type reloc_view_size) |
| 4365 | { |
| 4366 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 4367 | Classify_reloc; |
| 4368 | |
| 4369 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 4370 | |
| 4371 | gold::relocate_relocs<size, big_endian, Classify_reloc>( |
| 4372 | relinfo, |
| 4373 | prelocs, |
| 4374 | reloc_count, |
| 4375 | output_section, |
| 4376 | offset_in_output_section, |
| 4377 | view, |
| 4378 | view_address, |
| 4379 | view_size, |
| 4380 | reloc_view, |
| 4381 | reloc_view_size); |
| 4382 | } |
| 4383 | |
| 4384 | // Return the value to use for a dynamic which requires special |
| 4385 | // treatment. This is how we support equality comparisons of function |
| 4386 | // pointers across shared library boundaries, as described in the |
| 4387 | // processor specific ABI supplement. |
| 4388 | |
| 4389 | template<int size, bool big_endian> |
| 4390 | uint64_t |
| 4391 | Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const |
| 4392 | { |
| 4393 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); |
| 4394 | return this->plt_section()->address() + gsym->plt_offset(); |
| 4395 | } |
| 4396 | |
| 4397 | // do_make_elf_object to override the same function in the base class. |
| 4398 | // We need to use a target-specific sub-class of |
| 4399 | // Sized_relobj_file<size, big_endian> to process SPARC specific bits |
| 4400 | // of the ELF headers. Hence we need to have our own ELF object creation. |
| 4401 | |
| 4402 | template<int size, bool big_endian> |
| 4403 | Object* |
| 4404 | Target_sparc<size, big_endian>::do_make_elf_object( |
| 4405 | const std::string& name, |
| 4406 | Input_file* input_file, |
| 4407 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) |
| 4408 | { |
| 4409 | elfcpp::Elf_Half machine = ehdr.get_e_machine(); |
| 4410 | elfcpp::Elf_Word flags = ehdr.get_e_flags(); |
| 4411 | elfcpp::Elf_Word omm, mm; |
| 4412 | |
| 4413 | switch (machine) |
| 4414 | { |
| 4415 | case elfcpp::EM_SPARC32PLUS: |
| 4416 | this->elf_machine_ = elfcpp::EM_SPARC32PLUS; |
| 4417 | break; |
| 4418 | |
| 4419 | case elfcpp::EM_SPARC: |
| 4420 | case elfcpp::EM_SPARCV9: |
| 4421 | break; |
| 4422 | |
| 4423 | default: |
| 4424 | break; |
| 4425 | } |
| 4426 | |
| 4427 | if (!this->elf_flags_set_) |
| 4428 | { |
| 4429 | this->elf_flags_ = flags; |
| 4430 | this->elf_flags_set_ = true; |
| 4431 | } |
| 4432 | else |
| 4433 | { |
| 4434 | // Accumulate cpu feature bits. |
| 4435 | this->elf_flags_ |= (flags & (elfcpp::EF_SPARC_32PLUS |
| 4436 | | elfcpp::EF_SPARC_SUN_US1 |
| 4437 | | elfcpp::EF_SPARC_HAL_R1 |
| 4438 | | elfcpp::EF_SPARC_SUN_US3)); |
| 4439 | |
| 4440 | // Bump the memory model setting to the most restrictive |
| 4441 | // one we encounter. |
| 4442 | omm = (this->elf_flags_ & elfcpp::EF_SPARCV9_MM); |
| 4443 | mm = (flags & elfcpp::EF_SPARCV9_MM); |
| 4444 | if (omm != mm) |
| 4445 | { |
| 4446 | if (mm == elfcpp::EF_SPARCV9_TSO) |
| 4447 | { |
| 4448 | this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM; |
| 4449 | this->elf_flags_ |= elfcpp::EF_SPARCV9_TSO; |
| 4450 | } |
| 4451 | else if (mm == elfcpp::EF_SPARCV9_PSO |
| 4452 | && omm == elfcpp::EF_SPARCV9_RMO) |
| 4453 | { |
| 4454 | this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM; |
| 4455 | this->elf_flags_ |= elfcpp::EF_SPARCV9_PSO; |
| 4456 | } |
| 4457 | } |
| 4458 | } |
| 4459 | |
| 4460 | // Validate that the little-endian flag matches how we've |
| 4461 | // been instantiated. |
| 4462 | if (!(flags & elfcpp::EF_SPARC_LEDATA) != big_endian) |
| 4463 | { |
| 4464 | if (big_endian) |
| 4465 | gold_error(_("%s: little endian elf flag set on BE object"), |
| 4466 | name.c_str()); |
| 4467 | else |
| 4468 | gold_error(_("%s: little endian elf flag clear on LE object"), |
| 4469 | name.c_str()); |
| 4470 | } |
| 4471 | |
| 4472 | return Target::do_make_elf_object(name, input_file, offset, ehdr); |
| 4473 | } |
| 4474 | |
| 4475 | // Adjust ELF file header. |
| 4476 | |
| 4477 | template<int size, bool big_endian> |
| 4478 | void |
| 4479 | Target_sparc<size, big_endian>::do_adjust_elf_header( |
| 4480 | unsigned char* view, |
| 4481 | int len) |
| 4482 | { |
| 4483 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); |
| 4484 | |
| 4485 | oehdr.put_e_machine(this->elf_machine_); |
| 4486 | oehdr.put_e_flags(this->elf_flags_); |
| 4487 | |
| 4488 | Sized_target<size, big_endian>::do_adjust_elf_header(view, len); |
| 4489 | } |
| 4490 | |
| 4491 | // The selector for sparc object files. |
| 4492 | |
| 4493 | template<int size, bool big_endian> |
| 4494 | class Target_selector_sparc : public Target_selector |
| 4495 | { |
| 4496 | public: |
| 4497 | Target_selector_sparc() |
| 4498 | : Target_selector(elfcpp::EM_NONE, size, big_endian, |
| 4499 | (size == 64 ? "elf64-sparc" : "elf32-sparc"), |
| 4500 | (size == 64 ? "elf64_sparc" : "elf32_sparc")) |
| 4501 | { } |
| 4502 | |
| 4503 | virtual Target* |
| 4504 | do_recognize(Input_file*, off_t, int machine, int, int) |
| 4505 | { |
| 4506 | switch (size) |
| 4507 | { |
| 4508 | case 64: |
| 4509 | if (machine != elfcpp::EM_SPARCV9) |
| 4510 | return NULL; |
| 4511 | break; |
| 4512 | |
| 4513 | case 32: |
| 4514 | if (machine != elfcpp::EM_SPARC |
| 4515 | && machine != elfcpp::EM_SPARC32PLUS) |
| 4516 | return NULL; |
| 4517 | break; |
| 4518 | |
| 4519 | default: |
| 4520 | return NULL; |
| 4521 | } |
| 4522 | |
| 4523 | return this->instantiate_target(); |
| 4524 | } |
| 4525 | |
| 4526 | virtual Target* |
| 4527 | do_instantiate_target() |
| 4528 | { return new Target_sparc<size, big_endian>(); } |
| 4529 | }; |
| 4530 | |
| 4531 | Target_selector_sparc<32, true> target_selector_sparc32; |
| 4532 | Target_selector_sparc<64, true> target_selector_sparc64; |
| 4533 | |
| 4534 | } // End anonymous namespace. |