| 1 | // powerpc.cc -- powerpc target support for gold. |
| 2 | |
| 3 | // Copyright (C) 2008-2019 Free Software Foundation, Inc. |
| 4 | // Written by David S. Miller <davem@davemloft.net> |
| 5 | // and David Edelsohn <edelsohn@gnu.org> |
| 6 | |
| 7 | // This file is part of gold. |
| 8 | |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; either version 3 of the License, or |
| 12 | // (at your option) any later version. |
| 13 | |
| 14 | // This program is distributed in the hope that it will be useful, |
| 15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | // GNU General Public License for more details. |
| 18 | |
| 19 | // You should have received a copy of the GNU General Public License |
| 20 | // along with this program; if not, write to the Free Software |
| 21 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 22 | // MA 02110-1301, USA. |
| 23 | |
| 24 | #include "gold.h" |
| 25 | |
| 26 | #include <set> |
| 27 | #include <algorithm> |
| 28 | #include "elfcpp.h" |
| 29 | #include "dwarf.h" |
| 30 | #include "parameters.h" |
| 31 | #include "reloc.h" |
| 32 | #include "powerpc.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 | #include "attributes.h" |
| 45 | |
| 46 | namespace |
| 47 | { |
| 48 | |
| 49 | using namespace gold; |
| 50 | |
| 51 | template<int size, bool big_endian> |
| 52 | class Output_data_plt_powerpc; |
| 53 | |
| 54 | template<int size, bool big_endian> |
| 55 | class Output_data_brlt_powerpc; |
| 56 | |
| 57 | template<int size, bool big_endian> |
| 58 | class Output_data_got_powerpc; |
| 59 | |
| 60 | template<int size, bool big_endian> |
| 61 | class Output_data_glink; |
| 62 | |
| 63 | template<int size, bool big_endian> |
| 64 | class Stub_table; |
| 65 | |
| 66 | template<int size, bool big_endian> |
| 67 | class Output_data_save_res; |
| 68 | |
| 69 | template<int size, bool big_endian> |
| 70 | class Target_powerpc; |
| 71 | |
| 72 | struct Stub_table_owner |
| 73 | { |
| 74 | Stub_table_owner() |
| 75 | : output_section(NULL), owner(NULL) |
| 76 | { } |
| 77 | |
| 78 | Output_section* output_section; |
| 79 | const Output_section::Input_section* owner; |
| 80 | }; |
| 81 | |
| 82 | template<int size> |
| 83 | inline bool is_branch_reloc(unsigned int); |
| 84 | |
| 85 | template<int size> |
| 86 | inline bool is_plt16_reloc(unsigned int); |
| 87 | |
| 88 | // Counter incremented on every Powerpc_relobj constructed. |
| 89 | static uint32_t object_id = 0; |
| 90 | |
| 91 | template<int size, bool big_endian> |
| 92 | class Powerpc_relobj : public Sized_relobj_file<size, big_endian> |
| 93 | { |
| 94 | public: |
| 95 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 96 | typedef Unordered_set<Section_id, Section_id_hash> Section_refs; |
| 97 | typedef Unordered_map<Address, Section_refs> Access_from; |
| 98 | |
| 99 | Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset, |
| 100 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) |
| 101 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), |
| 102 | uniq_(object_id++), special_(0), relatoc_(0), toc_(0), |
| 103 | has_small_toc_reloc_(false), opd_valid_(false), |
| 104 | e_flags_(ehdr.get_e_flags()), no_toc_opt_(), opd_ent_(), |
| 105 | access_from_map_(), has14_(), stub_table_index_(), st_other_(), |
| 106 | attributes_section_data_(NULL) |
| 107 | { |
| 108 | this->set_abiversion(0); |
| 109 | } |
| 110 | |
| 111 | ~Powerpc_relobj() |
| 112 | { delete this->attributes_section_data_; } |
| 113 | |
| 114 | // Read the symbols then set up st_other vector. |
| 115 | void |
| 116 | do_read_symbols(Read_symbols_data*); |
| 117 | |
| 118 | // Arrange to always relocate .toc first. |
| 119 | virtual void |
| 120 | do_relocate_sections( |
| 121 | const Symbol_table* symtab, const Layout* layout, |
| 122 | const unsigned char* pshdrs, Output_file* of, |
| 123 | typename Sized_relobj_file<size, big_endian>::Views* pviews); |
| 124 | |
| 125 | // The .toc section index. |
| 126 | unsigned int |
| 127 | toc_shndx() const |
| 128 | { |
| 129 | return this->toc_; |
| 130 | } |
| 131 | |
| 132 | // Mark .toc entry at OFF as not optimizable. |
| 133 | void |
| 134 | set_no_toc_opt(Address off) |
| 135 | { |
| 136 | if (this->no_toc_opt_.empty()) |
| 137 | this->no_toc_opt_.resize(this->section_size(this->toc_shndx()) |
| 138 | / (size / 8)); |
| 139 | off /= size / 8; |
| 140 | if (off < this->no_toc_opt_.size()) |
| 141 | this->no_toc_opt_[off] = true; |
| 142 | } |
| 143 | |
| 144 | // Mark the entire .toc as not optimizable. |
| 145 | void |
| 146 | set_no_toc_opt() |
| 147 | { |
| 148 | this->no_toc_opt_.resize(1); |
| 149 | this->no_toc_opt_[0] = true; |
| 150 | } |
| 151 | |
| 152 | // Return true if code using the .toc entry at OFF should not be edited. |
| 153 | bool |
| 154 | no_toc_opt(Address off) const |
| 155 | { |
| 156 | if (this->no_toc_opt_.empty()) |
| 157 | return false; |
| 158 | off /= size / 8; |
| 159 | if (off >= this->no_toc_opt_.size()) |
| 160 | return true; |
| 161 | return this->no_toc_opt_[off]; |
| 162 | } |
| 163 | |
| 164 | // The .got2 section shndx. |
| 165 | unsigned int |
| 166 | got2_shndx() const |
| 167 | { |
| 168 | if (size == 32) |
| 169 | return this->special_; |
| 170 | else |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | // The .opd section shndx. |
| 175 | unsigned int |
| 176 | opd_shndx() const |
| 177 | { |
| 178 | if (size == 32) |
| 179 | return 0; |
| 180 | else |
| 181 | return this->special_; |
| 182 | } |
| 183 | |
| 184 | // Init OPD entry arrays. |
| 185 | void |
| 186 | init_opd(size_t opd_size) |
| 187 | { |
| 188 | size_t count = this->opd_ent_ndx(opd_size); |
| 189 | this->opd_ent_.resize(count); |
| 190 | } |
| 191 | |
| 192 | // Return section and offset of function entry for .opd + R_OFF. |
| 193 | unsigned int |
| 194 | get_opd_ent(Address r_off, Address* value = NULL) const |
| 195 | { |
| 196 | size_t ndx = this->opd_ent_ndx(r_off); |
| 197 | gold_assert(ndx < this->opd_ent_.size()); |
| 198 | gold_assert(this->opd_ent_[ndx].shndx != 0); |
| 199 | if (value != NULL) |
| 200 | *value = this->opd_ent_[ndx].off; |
| 201 | return this->opd_ent_[ndx].shndx; |
| 202 | } |
| 203 | |
| 204 | // Set section and offset of function entry for .opd + R_OFF. |
| 205 | void |
| 206 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
| 207 | { |
| 208 | size_t ndx = this->opd_ent_ndx(r_off); |
| 209 | gold_assert(ndx < this->opd_ent_.size()); |
| 210 | this->opd_ent_[ndx].shndx = shndx; |
| 211 | this->opd_ent_[ndx].off = value; |
| 212 | } |
| 213 | |
| 214 | // Return discard flag for .opd + R_OFF. |
| 215 | bool |
| 216 | get_opd_discard(Address r_off) const |
| 217 | { |
| 218 | size_t ndx = this->opd_ent_ndx(r_off); |
| 219 | gold_assert(ndx < this->opd_ent_.size()); |
| 220 | return this->opd_ent_[ndx].discard; |
| 221 | } |
| 222 | |
| 223 | // Set discard flag for .opd + R_OFF. |
| 224 | void |
| 225 | set_opd_discard(Address r_off) |
| 226 | { |
| 227 | size_t ndx = this->opd_ent_ndx(r_off); |
| 228 | gold_assert(ndx < this->opd_ent_.size()); |
| 229 | this->opd_ent_[ndx].discard = true; |
| 230 | } |
| 231 | |
| 232 | bool |
| 233 | opd_valid() const |
| 234 | { return this->opd_valid_; } |
| 235 | |
| 236 | void |
| 237 | set_opd_valid() |
| 238 | { this->opd_valid_ = true; } |
| 239 | |
| 240 | // Examine .rela.opd to build info about function entry points. |
| 241 | void |
| 242 | scan_opd_relocs(size_t reloc_count, |
| 243 | const unsigned char* prelocs, |
| 244 | const unsigned char* plocal_syms); |
| 245 | |
| 246 | // Returns true if a code sequence loading a TOC entry can be |
| 247 | // converted into code calculating a TOC pointer relative offset. |
| 248 | bool |
| 249 | make_toc_relative(Target_powerpc<size, big_endian>* target, |
| 250 | Address* value); |
| 251 | |
| 252 | bool |
| 253 | make_got_relative(Target_powerpc<size, big_endian>* target, |
| 254 | const Symbol_value<size>* psymval, |
| 255 | Address addend, |
| 256 | Address* value); |
| 257 | |
| 258 | // Perform the Sized_relobj_file method, then set up opd info from |
| 259 | // .opd relocs. |
| 260 | void |
| 261 | do_read_relocs(Read_relocs_data*); |
| 262 | |
| 263 | bool |
| 264 | do_find_special_sections(Read_symbols_data* sd); |
| 265 | |
| 266 | // Adjust this local symbol value. Return false if the symbol |
| 267 | // should be discarded from the output file. |
| 268 | bool |
| 269 | do_adjust_local_symbol(Symbol_value<size>* lv) const |
| 270 | { |
| 271 | if (size == 64 && this->opd_shndx() != 0) |
| 272 | { |
| 273 | bool is_ordinary; |
| 274 | if (lv->input_shndx(&is_ordinary) != this->opd_shndx()) |
| 275 | return true; |
| 276 | if (this->get_opd_discard(lv->input_value())) |
| 277 | return false; |
| 278 | } |
| 279 | return true; |
| 280 | } |
| 281 | |
| 282 | Access_from* |
| 283 | access_from_map() |
| 284 | { return &this->access_from_map_; } |
| 285 | |
| 286 | // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd |
| 287 | // section at DST_OFF. |
| 288 | void |
| 289 | add_reference(Relobj* src_obj, |
| 290 | unsigned int src_indx, |
| 291 | typename elfcpp::Elf_types<size>::Elf_Addr dst_off) |
| 292 | { |
| 293 | Section_id src_id(src_obj, src_indx); |
| 294 | this->access_from_map_[dst_off].insert(src_id); |
| 295 | } |
| 296 | |
| 297 | // Add a reference to the code section specified by the .opd entry |
| 298 | // at DST_OFF |
| 299 | void |
| 300 | add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off) |
| 301 | { |
| 302 | size_t ndx = this->opd_ent_ndx(dst_off); |
| 303 | if (ndx >= this->opd_ent_.size()) |
| 304 | this->opd_ent_.resize(ndx + 1); |
| 305 | this->opd_ent_[ndx].gc_mark = true; |
| 306 | } |
| 307 | |
| 308 | void |
| 309 | process_gc_mark(Symbol_table* symtab) |
| 310 | { |
| 311 | for (size_t i = 0; i < this->opd_ent_.size(); i++) |
| 312 | if (this->opd_ent_[i].gc_mark) |
| 313 | { |
| 314 | unsigned int shndx = this->opd_ent_[i].shndx; |
| 315 | symtab->gc()->worklist().push_back(Section_id(this, shndx)); |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | // Return offset in output GOT section that this object will use |
| 320 | // as a TOC pointer. Won't be just a constant with multi-toc support. |
| 321 | Address |
| 322 | toc_base_offset() const |
| 323 | { return 0x8000; } |
| 324 | |
| 325 | void |
| 326 | set_has_small_toc_reloc() |
| 327 | { has_small_toc_reloc_ = true; } |
| 328 | |
| 329 | bool |
| 330 | has_small_toc_reloc() const |
| 331 | { return has_small_toc_reloc_; } |
| 332 | |
| 333 | void |
| 334 | set_has_14bit_branch(unsigned int shndx) |
| 335 | { |
| 336 | if (shndx >= this->has14_.size()) |
| 337 | this->has14_.resize(shndx + 1); |
| 338 | this->has14_[shndx] = true; |
| 339 | } |
| 340 | |
| 341 | bool |
| 342 | has_14bit_branch(unsigned int shndx) const |
| 343 | { return shndx < this->has14_.size() && this->has14_[shndx]; } |
| 344 | |
| 345 | void |
| 346 | set_stub_table(unsigned int shndx, unsigned int stub_index) |
| 347 | { |
| 348 | if (shndx >= this->stub_table_index_.size()) |
| 349 | this->stub_table_index_.resize(shndx + 1, -1); |
| 350 | this->stub_table_index_[shndx] = stub_index; |
| 351 | } |
| 352 | |
| 353 | Stub_table<size, big_endian>* |
| 354 | stub_table(unsigned int shndx) |
| 355 | { |
| 356 | if (shndx < this->stub_table_index_.size()) |
| 357 | { |
| 358 | Target_powerpc<size, big_endian>* target |
| 359 | = static_cast<Target_powerpc<size, big_endian>*>( |
| 360 | parameters->sized_target<size, big_endian>()); |
| 361 | unsigned int indx = this->stub_table_index_[shndx]; |
| 362 | if (indx < target->stub_tables().size()) |
| 363 | return target->stub_tables()[indx]; |
| 364 | } |
| 365 | return NULL; |
| 366 | } |
| 367 | |
| 368 | void |
| 369 | clear_stub_table() |
| 370 | { |
| 371 | this->stub_table_index_.clear(); |
| 372 | } |
| 373 | |
| 374 | uint32_t |
| 375 | uniq() const |
| 376 | { return this->uniq_; } |
| 377 | |
| 378 | int |
| 379 | abiversion() const |
| 380 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } |
| 381 | |
| 382 | // Set ABI version for input and output |
| 383 | void |
| 384 | set_abiversion(int ver); |
| 385 | |
| 386 | unsigned int |
| 387 | st_other (unsigned int symndx) const |
| 388 | { |
| 389 | return this->st_other_[symndx]; |
| 390 | } |
| 391 | |
| 392 | unsigned int |
| 393 | ppc64_local_entry_offset(const Symbol* sym) const |
| 394 | { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); } |
| 395 | |
| 396 | unsigned int |
| 397 | ppc64_local_entry_offset(unsigned int symndx) const |
| 398 | { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); } |
| 399 | |
| 400 | bool |
| 401 | ppc64_needs_toc(const Symbol* sym) const |
| 402 | { return sym->nonvis() > 1 << 3; } |
| 403 | |
| 404 | bool |
| 405 | ppc64_needs_toc(unsigned int symndx) const |
| 406 | { return this->st_other_[symndx] > 1 << 5; } |
| 407 | |
| 408 | // The contents of the .gnu.attributes section if there is one. |
| 409 | const Attributes_section_data* |
| 410 | attributes_section_data() const |
| 411 | { return this->attributes_section_data_; } |
| 412 | |
| 413 | private: |
| 414 | struct Opd_ent |
| 415 | { |
| 416 | unsigned int shndx; |
| 417 | bool discard : 1; |
| 418 | bool gc_mark : 1; |
| 419 | Address off; |
| 420 | }; |
| 421 | |
| 422 | // Return index into opd_ent_ array for .opd entry at OFF. |
| 423 | // .opd entries are 24 bytes long, but they can be spaced 16 bytes |
| 424 | // apart when the language doesn't use the last 8-byte word, the |
| 425 | // environment pointer. Thus dividing the entry section offset by |
| 426 | // 16 will give an index into opd_ent_ that works for either layout |
| 427 | // of .opd. (It leaves some elements of the vector unused when .opd |
| 428 | // entries are spaced 24 bytes apart, but we don't know the spacing |
| 429 | // until relocations are processed, and in any case it is possible |
| 430 | // for an object to have some entries spaced 16 bytes apart and |
| 431 | // others 24 bytes apart.) |
| 432 | size_t |
| 433 | opd_ent_ndx(size_t off) const |
| 434 | { return off >> 4;} |
| 435 | |
| 436 | // Per object unique identifier |
| 437 | uint32_t uniq_; |
| 438 | |
| 439 | // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx. |
| 440 | unsigned int special_; |
| 441 | |
| 442 | // For 64-bit the .rela.toc and .toc section shdnx. |
| 443 | unsigned int relatoc_; |
| 444 | unsigned int toc_; |
| 445 | |
| 446 | // For 64-bit, whether this object uses small model relocs to access |
| 447 | // the toc. |
| 448 | bool has_small_toc_reloc_; |
| 449 | |
| 450 | // Set at the start of gc_process_relocs, when we know opd_ent_ |
| 451 | // vector is valid. The flag could be made atomic and set in |
| 452 | // do_read_relocs with memory_order_release and then tested with |
| 453 | // memory_order_acquire, potentially resulting in fewer entries in |
| 454 | // access_from_map_. |
| 455 | bool opd_valid_; |
| 456 | |
| 457 | // Header e_flags |
| 458 | elfcpp::Elf_Word e_flags_; |
| 459 | |
| 460 | // For 64-bit, an array with one entry per 64-bit word in the .toc |
| 461 | // section, set if accesses using that word cannot be optimised. |
| 462 | std::vector<bool> no_toc_opt_; |
| 463 | |
| 464 | // The first 8-byte word of an OPD entry gives the address of the |
| 465 | // entry point of the function. Relocatable object files have a |
| 466 | // relocation on this word. The following vector records the |
| 467 | // section and offset specified by these relocations. |
| 468 | std::vector<Opd_ent> opd_ent_; |
| 469 | |
| 470 | // References made to this object's .opd section when running |
| 471 | // gc_process_relocs for another object, before the opd_ent_ vector |
| 472 | // is valid for this object. |
| 473 | Access_from access_from_map_; |
| 474 | |
| 475 | // Whether input section has a 14-bit branch reloc. |
| 476 | std::vector<bool> has14_; |
| 477 | |
| 478 | // The stub table to use for a given input section. |
| 479 | std::vector<unsigned int> stub_table_index_; |
| 480 | |
| 481 | // ELF st_other field for local symbols. |
| 482 | std::vector<unsigned char> st_other_; |
| 483 | |
| 484 | // Object attributes if there is a .gnu.attributes section. |
| 485 | Attributes_section_data* attributes_section_data_; |
| 486 | }; |
| 487 | |
| 488 | template<int size, bool big_endian> |
| 489 | class Powerpc_dynobj : public Sized_dynobj<size, big_endian> |
| 490 | { |
| 491 | public: |
| 492 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 493 | |
| 494 | Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset, |
| 495 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) |
| 496 | : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr), |
| 497 | opd_shndx_(0), e_flags_(ehdr.get_e_flags()), opd_ent_(), |
| 498 | attributes_section_data_(NULL) |
| 499 | { |
| 500 | this->set_abiversion(0); |
| 501 | } |
| 502 | |
| 503 | ~Powerpc_dynobj() |
| 504 | { delete this->attributes_section_data_; } |
| 505 | |
| 506 | // Call Sized_dynobj::do_read_symbols to read the symbols then |
| 507 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
| 508 | void |
| 509 | do_read_symbols(Read_symbols_data*); |
| 510 | |
| 511 | // The .opd section shndx. |
| 512 | unsigned int |
| 513 | opd_shndx() const |
| 514 | { |
| 515 | return this->opd_shndx_; |
| 516 | } |
| 517 | |
| 518 | // The .opd section address. |
| 519 | Address |
| 520 | opd_address() const |
| 521 | { |
| 522 | return this->opd_address_; |
| 523 | } |
| 524 | |
| 525 | // Init OPD entry arrays. |
| 526 | void |
| 527 | init_opd(size_t opd_size) |
| 528 | { |
| 529 | size_t count = this->opd_ent_ndx(opd_size); |
| 530 | this->opd_ent_.resize(count); |
| 531 | } |
| 532 | |
| 533 | // Return section and offset of function entry for .opd + R_OFF. |
| 534 | unsigned int |
| 535 | get_opd_ent(Address r_off, Address* value = NULL) const |
| 536 | { |
| 537 | size_t ndx = this->opd_ent_ndx(r_off); |
| 538 | gold_assert(ndx < this->opd_ent_.size()); |
| 539 | gold_assert(this->opd_ent_[ndx].shndx != 0); |
| 540 | if (value != NULL) |
| 541 | *value = this->opd_ent_[ndx].off; |
| 542 | return this->opd_ent_[ndx].shndx; |
| 543 | } |
| 544 | |
| 545 | // Set section and offset of function entry for .opd + R_OFF. |
| 546 | void |
| 547 | set_opd_ent(Address r_off, unsigned int shndx, Address value) |
| 548 | { |
| 549 | size_t ndx = this->opd_ent_ndx(r_off); |
| 550 | gold_assert(ndx < this->opd_ent_.size()); |
| 551 | this->opd_ent_[ndx].shndx = shndx; |
| 552 | this->opd_ent_[ndx].off = value; |
| 553 | } |
| 554 | |
| 555 | int |
| 556 | abiversion() const |
| 557 | { return this->e_flags_ & elfcpp::EF_PPC64_ABI; } |
| 558 | |
| 559 | // Set ABI version for input and output. |
| 560 | void |
| 561 | set_abiversion(int ver); |
| 562 | |
| 563 | // The contents of the .gnu.attributes section if there is one. |
| 564 | const Attributes_section_data* |
| 565 | attributes_section_data() const |
| 566 | { return this->attributes_section_data_; } |
| 567 | |
| 568 | private: |
| 569 | // Used to specify extent of executable sections. |
| 570 | struct Sec_info |
| 571 | { |
| 572 | Sec_info(Address start_, Address len_, unsigned int shndx_) |
| 573 | : start(start_), len(len_), shndx(shndx_) |
| 574 | { } |
| 575 | |
| 576 | bool |
| 577 | operator<(const Sec_info& that) const |
| 578 | { return this->start < that.start; } |
| 579 | |
| 580 | Address start; |
| 581 | Address len; |
| 582 | unsigned int shndx; |
| 583 | }; |
| 584 | |
| 585 | struct Opd_ent |
| 586 | { |
| 587 | unsigned int shndx; |
| 588 | Address off; |
| 589 | }; |
| 590 | |
| 591 | // Return index into opd_ent_ array for .opd entry at OFF. |
| 592 | size_t |
| 593 | opd_ent_ndx(size_t off) const |
| 594 | { return off >> 4;} |
| 595 | |
| 596 | // For 64-bit the .opd section shndx and address. |
| 597 | unsigned int opd_shndx_; |
| 598 | Address opd_address_; |
| 599 | |
| 600 | // Header e_flags |
| 601 | elfcpp::Elf_Word e_flags_; |
| 602 | |
| 603 | // The first 8-byte word of an OPD entry gives the address of the |
| 604 | // entry point of the function. Records the section and offset |
| 605 | // corresponding to the address. Note that in dynamic objects, |
| 606 | // offset is *not* relative to the section. |
| 607 | std::vector<Opd_ent> opd_ent_; |
| 608 | |
| 609 | // Object attributes if there is a .gnu.attributes section. |
| 610 | Attributes_section_data* attributes_section_data_; |
| 611 | }; |
| 612 | |
| 613 | // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the |
| 614 | // base class will emit. |
| 615 | |
| 616 | template<int sh_type, int size, bool big_endian> |
| 617 | class Powerpc_copy_relocs : public Copy_relocs<sh_type, size, big_endian> |
| 618 | { |
| 619 | public: |
| 620 | Powerpc_copy_relocs() |
| 621 | : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_POWERPC_COPY) |
| 622 | { } |
| 623 | |
| 624 | // Emit any saved relocations which turn out to be needed. This is |
| 625 | // called after all the relocs have been scanned. |
| 626 | void |
| 627 | emit(Output_data_reloc<sh_type, true, size, big_endian>*); |
| 628 | }; |
| 629 | |
| 630 | template<int size, bool big_endian> |
| 631 | class Target_powerpc : public Sized_target<size, big_endian> |
| 632 | { |
| 633 | public: |
| 634 | typedef |
| 635 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; |
| 636 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 637 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address; |
| 638 | typedef Unordered_set<Symbol_location, Symbol_location_hash> Tocsave_loc; |
| 639 | static const Address invalid_address = static_cast<Address>(0) - 1; |
| 640 | // Offset of tp and dtp pointers from start of TLS block. |
| 641 | static const Address tp_offset = 0x7000; |
| 642 | static const Address dtp_offset = 0x8000; |
| 643 | |
| 644 | Target_powerpc() |
| 645 | : Sized_target<size, big_endian>(&powerpc_info), |
| 646 | got_(NULL), plt_(NULL), iplt_(NULL), lplt_(NULL), brlt_section_(NULL), |
| 647 | glink_(NULL), rela_dyn_(NULL), copy_relocs_(), |
| 648 | tlsld_got_offset_(-1U), |
| 649 | stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(), |
| 650 | powerxx_stubs_(false), plt_thread_safe_(false), plt_localentry0_(false), |
| 651 | plt_localentry0_init_(false), has_localentry0_(false), |
| 652 | has_tls_get_addr_opt_(false), |
| 653 | relax_failed_(false), relax_fail_count_(0), |
| 654 | stub_group_size_(0), savres_section_(0), |
| 655 | tls_get_addr_(NULL), tls_get_addr_opt_(NULL), |
| 656 | attributes_section_data_(NULL), |
| 657 | last_fp_(NULL), last_ld_(NULL), last_vec_(NULL), last_struct_(NULL) |
| 658 | { |
| 659 | } |
| 660 | |
| 661 | // Process the relocations to determine unreferenced sections for |
| 662 | // garbage collection. |
| 663 | void |
| 664 | gc_process_relocs(Symbol_table* symtab, |
| 665 | Layout* layout, |
| 666 | Sized_relobj_file<size, big_endian>* object, |
| 667 | unsigned int data_shndx, |
| 668 | unsigned int sh_type, |
| 669 | const unsigned char* prelocs, |
| 670 | size_t reloc_count, |
| 671 | Output_section* output_section, |
| 672 | bool needs_special_offset_handling, |
| 673 | size_t local_symbol_count, |
| 674 | const unsigned char* plocal_symbols); |
| 675 | |
| 676 | // Scan the relocations to look for symbol adjustments. |
| 677 | void |
| 678 | scan_relocs(Symbol_table* symtab, |
| 679 | Layout* layout, |
| 680 | Sized_relobj_file<size, big_endian>* object, |
| 681 | unsigned int data_shndx, |
| 682 | unsigned int sh_type, |
| 683 | const unsigned char* prelocs, |
| 684 | size_t reloc_count, |
| 685 | Output_section* output_section, |
| 686 | bool needs_special_offset_handling, |
| 687 | size_t local_symbol_count, |
| 688 | const unsigned char* plocal_symbols); |
| 689 | |
| 690 | // Map input .toc section to output .got section. |
| 691 | const char* |
| 692 | do_output_section_name(const Relobj*, const char* name, size_t* plen) const |
| 693 | { |
| 694 | if (size == 64 && strcmp(name, ".toc") == 0) |
| 695 | { |
| 696 | *plen = 4; |
| 697 | return ".got"; |
| 698 | } |
| 699 | return NULL; |
| 700 | } |
| 701 | |
| 702 | // Provide linker defined save/restore functions. |
| 703 | void |
| 704 | define_save_restore_funcs(Layout*, Symbol_table*); |
| 705 | |
| 706 | // No stubs unless a final link. |
| 707 | bool |
| 708 | do_may_relax() const |
| 709 | { return !parameters->options().relocatable(); } |
| 710 | |
| 711 | bool |
| 712 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); |
| 713 | |
| 714 | void |
| 715 | do_plt_fde_location(const Output_data*, unsigned char*, |
| 716 | uint64_t*, off_t*) const; |
| 717 | |
| 718 | // Stash info about branches, for stub generation. |
| 719 | void |
| 720 | push_branch(Powerpc_relobj<size, big_endian>* ppc_object, |
| 721 | unsigned int data_shndx, Address r_offset, |
| 722 | unsigned int r_type, unsigned int r_sym, Address addend) |
| 723 | { |
| 724 | Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend); |
| 725 | this->branch_info_.push_back(info); |
| 726 | if (r_type == elfcpp::R_POWERPC_REL14 |
| 727 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN |
| 728 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) |
| 729 | ppc_object->set_has_14bit_branch(data_shndx); |
| 730 | } |
| 731 | |
| 732 | // Return whether the last branch is a plt call, and if so, mark the |
| 733 | // branch as having an R_PPC64_TOCSAVE. |
| 734 | bool |
| 735 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, |
| 736 | unsigned int data_shndx, Address r_offset, Symbol_table* symtab) |
| 737 | { |
| 738 | return (size == 64 |
| 739 | && !this->branch_info_.empty() |
| 740 | && this->branch_info_.back().mark_pltcall(ppc_object, data_shndx, |
| 741 | r_offset, this, symtab)); |
| 742 | } |
| 743 | |
| 744 | // Say the given location, that of a nop in a function prologue with |
| 745 | // an R_PPC64_TOCSAVE reloc, will be used to save r2. |
| 746 | // R_PPC64_TOCSAVE relocs on nops following calls point at this nop. |
| 747 | void |
| 748 | add_tocsave(Powerpc_relobj<size, big_endian>* ppc_object, |
| 749 | unsigned int shndx, Address offset) |
| 750 | { |
| 751 | Symbol_location loc; |
| 752 | loc.object = ppc_object; |
| 753 | loc.shndx = shndx; |
| 754 | loc.offset = offset; |
| 755 | this->tocsave_loc_.insert(loc); |
| 756 | } |
| 757 | |
| 758 | // Accessor |
| 759 | const Tocsave_loc |
| 760 | tocsave_loc() const |
| 761 | { |
| 762 | return this->tocsave_loc_; |
| 763 | } |
| 764 | |
| 765 | void |
| 766 | do_define_standard_symbols(Symbol_table*, Layout*); |
| 767 | |
| 768 | // Finalize the sections. |
| 769 | void |
| 770 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); |
| 771 | |
| 772 | // Return the value to use for a dynamic which requires special |
| 773 | // treatment. |
| 774 | uint64_t |
| 775 | do_dynsym_value(const Symbol*) const; |
| 776 | |
| 777 | // Return the PLT address to use for a local symbol. |
| 778 | uint64_t |
| 779 | do_plt_address_for_local(const Relobj*, unsigned int) const; |
| 780 | |
| 781 | // Return the PLT address to use for a global symbol. |
| 782 | uint64_t |
| 783 | do_plt_address_for_global(const Symbol*) const; |
| 784 | |
| 785 | // Return the offset to use for the GOT_INDX'th got entry which is |
| 786 | // for a local tls symbol specified by OBJECT, SYMNDX. |
| 787 | int64_t |
| 788 | do_tls_offset_for_local(const Relobj* object, |
| 789 | unsigned int symndx, |
| 790 | unsigned int got_indx) const; |
| 791 | |
| 792 | // Return the offset to use for the GOT_INDX'th got entry which is |
| 793 | // for global tls symbol GSYM. |
| 794 | int64_t |
| 795 | do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const; |
| 796 | |
| 797 | void |
| 798 | do_function_location(Symbol_location*) const; |
| 799 | |
| 800 | bool |
| 801 | do_can_check_for_function_pointers() const |
| 802 | { return true; } |
| 803 | |
| 804 | // Adjust -fsplit-stack code which calls non-split-stack code. |
| 805 | void |
| 806 | do_calls_non_split(Relobj* object, unsigned int shndx, |
| 807 | section_offset_type fnoffset, section_size_type fnsize, |
| 808 | const unsigned char* prelocs, size_t reloc_count, |
| 809 | unsigned char* view, section_size_type view_size, |
| 810 | std::string* from, std::string* to) const; |
| 811 | |
| 812 | // Relocate a section. |
| 813 | void |
| 814 | relocate_section(const Relocate_info<size, big_endian>*, |
| 815 | unsigned int sh_type, |
| 816 | const unsigned char* prelocs, |
| 817 | size_t reloc_count, |
| 818 | Output_section* output_section, |
| 819 | bool needs_special_offset_handling, |
| 820 | unsigned char* view, |
| 821 | Address view_address, |
| 822 | section_size_type view_size, |
| 823 | const Reloc_symbol_changes*); |
| 824 | |
| 825 | // Scan the relocs during a relocatable link. |
| 826 | void |
| 827 | scan_relocatable_relocs(Symbol_table* symtab, |
| 828 | Layout* layout, |
| 829 | Sized_relobj_file<size, big_endian>* object, |
| 830 | unsigned int data_shndx, |
| 831 | unsigned int sh_type, |
| 832 | const unsigned char* prelocs, |
| 833 | size_t reloc_count, |
| 834 | Output_section* output_section, |
| 835 | bool needs_special_offset_handling, |
| 836 | size_t local_symbol_count, |
| 837 | const unsigned char* plocal_symbols, |
| 838 | Relocatable_relocs*); |
| 839 | |
| 840 | // Scan the relocs for --emit-relocs. |
| 841 | void |
| 842 | emit_relocs_scan(Symbol_table* symtab, |
| 843 | Layout* layout, |
| 844 | Sized_relobj_file<size, big_endian>* object, |
| 845 | unsigned int data_shndx, |
| 846 | unsigned int sh_type, |
| 847 | const unsigned char* prelocs, |
| 848 | size_t reloc_count, |
| 849 | Output_section* output_section, |
| 850 | bool needs_special_offset_handling, |
| 851 | size_t local_symbol_count, |
| 852 | const unsigned char* plocal_syms, |
| 853 | Relocatable_relocs* rr); |
| 854 | |
| 855 | // Emit relocations for a section. |
| 856 | void |
| 857 | relocate_relocs(const Relocate_info<size, big_endian>*, |
| 858 | unsigned int sh_type, |
| 859 | const unsigned char* prelocs, |
| 860 | size_t reloc_count, |
| 861 | Output_section* output_section, |
| 862 | typename elfcpp::Elf_types<size>::Elf_Off |
| 863 | offset_in_output_section, |
| 864 | unsigned char*, |
| 865 | Address view_address, |
| 866 | section_size_type, |
| 867 | unsigned char* reloc_view, |
| 868 | section_size_type reloc_view_size); |
| 869 | |
| 870 | // Return whether SYM is defined by the ABI. |
| 871 | bool |
| 872 | do_is_defined_by_abi(const Symbol* sym) const |
| 873 | { |
| 874 | return strcmp(sym->name(), "__tls_get_addr") == 0; |
| 875 | } |
| 876 | |
| 877 | // Return the size of the GOT section. |
| 878 | section_size_type |
| 879 | got_size() const |
| 880 | { |
| 881 | gold_assert(this->got_ != NULL); |
| 882 | return this->got_->data_size(); |
| 883 | } |
| 884 | |
| 885 | // Get the PLT section. |
| 886 | const Output_data_plt_powerpc<size, big_endian>* |
| 887 | plt_section() const |
| 888 | { |
| 889 | gold_assert(this->plt_ != NULL); |
| 890 | return this->plt_; |
| 891 | } |
| 892 | |
| 893 | // Get the IPLT section. |
| 894 | const Output_data_plt_powerpc<size, big_endian>* |
| 895 | iplt_section() const |
| 896 | { |
| 897 | gold_assert(this->iplt_ != NULL); |
| 898 | return this->iplt_; |
| 899 | } |
| 900 | |
| 901 | // Get the LPLT section. |
| 902 | const Output_data_plt_powerpc<size, big_endian>* |
| 903 | lplt_section() const |
| 904 | { |
| 905 | return this->lplt_; |
| 906 | } |
| 907 | |
| 908 | // Return the plt offset and section for the given global sym. |
| 909 | Address |
| 910 | plt_off(const Symbol* gsym, |
| 911 | const Output_data_plt_powerpc<size, big_endian>** sec) const |
| 912 | { |
| 913 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
| 914 | && gsym->can_use_relative_reloc(false)) |
| 915 | *sec = this->iplt_section(); |
| 916 | else |
| 917 | *sec = this->plt_section(); |
| 918 | return gsym->plt_offset(); |
| 919 | } |
| 920 | |
| 921 | // Return the plt offset and section for the given local sym. |
| 922 | Address |
| 923 | plt_off(const Sized_relobj_file<size, big_endian>* relobj, |
| 924 | unsigned int local_sym_index, |
| 925 | const Output_data_plt_powerpc<size, big_endian>** sec) const |
| 926 | { |
| 927 | const Symbol_value<size>* lsym = relobj->local_symbol(local_sym_index); |
| 928 | if (lsym->is_ifunc_symbol()) |
| 929 | *sec = this->iplt_section(); |
| 930 | else |
| 931 | *sec = this->lplt_section(); |
| 932 | return relobj->local_plt_offset(local_sym_index); |
| 933 | } |
| 934 | |
| 935 | // Get the .glink section. |
| 936 | const Output_data_glink<size, big_endian>* |
| 937 | glink_section() const |
| 938 | { |
| 939 | gold_assert(this->glink_ != NULL); |
| 940 | return this->glink_; |
| 941 | } |
| 942 | |
| 943 | Output_data_glink<size, big_endian>* |
| 944 | glink_section() |
| 945 | { |
| 946 | gold_assert(this->glink_ != NULL); |
| 947 | return this->glink_; |
| 948 | } |
| 949 | |
| 950 | bool has_glink() const |
| 951 | { return this->glink_ != NULL; } |
| 952 | |
| 953 | // Get the GOT section. |
| 954 | const Output_data_got_powerpc<size, big_endian>* |
| 955 | got_section() const |
| 956 | { |
| 957 | gold_assert(this->got_ != NULL); |
| 958 | return this->got_; |
| 959 | } |
| 960 | |
| 961 | // Get the GOT section, creating it if necessary. |
| 962 | Output_data_got_powerpc<size, big_endian>* |
| 963 | got_section(Symbol_table*, Layout*); |
| 964 | |
| 965 | Object* |
| 966 | do_make_elf_object(const std::string&, Input_file*, off_t, |
| 967 | const elfcpp::Ehdr<size, big_endian>&); |
| 968 | |
| 969 | // Return the number of entries in the GOT. |
| 970 | unsigned int |
| 971 | got_entry_count() const |
| 972 | { |
| 973 | if (this->got_ == NULL) |
| 974 | return 0; |
| 975 | return this->got_size() / (size / 8); |
| 976 | } |
| 977 | |
| 978 | // Return the number of entries in the PLT. |
| 979 | unsigned int |
| 980 | plt_entry_count() const; |
| 981 | |
| 982 | // Return the offset of the first non-reserved PLT entry. |
| 983 | unsigned int |
| 984 | first_plt_entry_offset() const |
| 985 | { |
| 986 | if (size == 32) |
| 987 | return 0; |
| 988 | if (this->abiversion() >= 2) |
| 989 | return 16; |
| 990 | return 24; |
| 991 | } |
| 992 | |
| 993 | // Return the size of each PLT entry. |
| 994 | unsigned int |
| 995 | plt_entry_size() const |
| 996 | { |
| 997 | if (size == 32) |
| 998 | return 4; |
| 999 | if (this->abiversion() >= 2) |
| 1000 | return 8; |
| 1001 | return 24; |
| 1002 | } |
| 1003 | |
| 1004 | Output_data_save_res<size, big_endian>* |
| 1005 | savres_section() const |
| 1006 | { |
| 1007 | return this->savres_section_; |
| 1008 | } |
| 1009 | |
| 1010 | // Add any special sections for this symbol to the gc work list. |
| 1011 | // For powerpc64, this adds the code section of a function |
| 1012 | // descriptor. |
| 1013 | void |
| 1014 | do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const; |
| 1015 | |
| 1016 | // Handle target specific gc actions when adding a gc reference from |
| 1017 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX |
| 1018 | // and DST_OFF. For powerpc64, this adds a referenc to the code |
| 1019 | // section of a function descriptor. |
| 1020 | void |
| 1021 | do_gc_add_reference(Symbol_table* symtab, |
| 1022 | Relobj* src_obj, |
| 1023 | unsigned int src_shndx, |
| 1024 | Relobj* dst_obj, |
| 1025 | unsigned int dst_shndx, |
| 1026 | Address dst_off) const; |
| 1027 | |
| 1028 | typedef std::vector<Stub_table<size, big_endian>*> Stub_tables; |
| 1029 | const Stub_tables& |
| 1030 | stub_tables() const |
| 1031 | { return this->stub_tables_; } |
| 1032 | |
| 1033 | const Output_data_brlt_powerpc<size, big_endian>* |
| 1034 | brlt_section() const |
| 1035 | { return this->brlt_section_; } |
| 1036 | |
| 1037 | void |
| 1038 | add_branch_lookup_table(Address to) |
| 1039 | { |
| 1040 | unsigned int off = this->branch_lookup_table_.size() * (size / 8); |
| 1041 | this->branch_lookup_table_.insert(std::make_pair(to, off)); |
| 1042 | } |
| 1043 | |
| 1044 | Address |
| 1045 | find_branch_lookup_table(Address to) |
| 1046 | { |
| 1047 | typename Branch_lookup_table::const_iterator p |
| 1048 | = this->branch_lookup_table_.find(to); |
| 1049 | return p == this->branch_lookup_table_.end() ? invalid_address : p->second; |
| 1050 | } |
| 1051 | |
| 1052 | void |
| 1053 | write_branch_lookup_table(unsigned char *oview) |
| 1054 | { |
| 1055 | for (typename Branch_lookup_table::const_iterator p |
| 1056 | = this->branch_lookup_table_.begin(); |
| 1057 | p != this->branch_lookup_table_.end(); |
| 1058 | ++p) |
| 1059 | { |
| 1060 | elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first); |
| 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | // Wrapper used after relax to define a local symbol in output data, |
| 1065 | // from the end if value < 0. |
| 1066 | void |
| 1067 | define_local(Symbol_table* symtab, const char* name, |
| 1068 | Output_data* od, Address value, unsigned int symsize) |
| 1069 | { |
| 1070 | Symbol* sym |
| 1071 | = symtab->define_in_output_data(name, NULL, Symbol_table::PREDEFINED, |
| 1072 | od, value, symsize, elfcpp::STT_NOTYPE, |
| 1073 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0, |
| 1074 | static_cast<Signed_address>(value) < 0, |
| 1075 | false); |
| 1076 | // We are creating this symbol late, so need to fix up things |
| 1077 | // done early in Layout::finalize. |
| 1078 | sym->set_dynsym_index(-1U); |
| 1079 | } |
| 1080 | |
| 1081 | bool |
| 1082 | powerxx_stubs() const |
| 1083 | { return this->powerxx_stubs_; } |
| 1084 | |
| 1085 | void |
| 1086 | set_powerxx_stubs() |
| 1087 | { |
| 1088 | this->powerxx_stubs_ = true; |
| 1089 | } |
| 1090 | |
| 1091 | bool |
| 1092 | plt_thread_safe() const |
| 1093 | { return this->plt_thread_safe_; } |
| 1094 | |
| 1095 | bool |
| 1096 | plt_localentry0() const |
| 1097 | { return this->plt_localentry0_; } |
| 1098 | |
| 1099 | void |
| 1100 | set_has_localentry0() |
| 1101 | { |
| 1102 | this->has_localentry0_ = true; |
| 1103 | } |
| 1104 | |
| 1105 | bool |
| 1106 | is_elfv2_localentry0(const Symbol* gsym) const |
| 1107 | { |
| 1108 | return (size == 64 |
| 1109 | && this->abiversion() >= 2 |
| 1110 | && this->plt_localentry0() |
| 1111 | && gsym->type() == elfcpp::STT_FUNC |
| 1112 | && gsym->is_defined() |
| 1113 | && gsym->nonvis() >> 3 == 0 |
| 1114 | && !gsym->non_zero_localentry()); |
| 1115 | } |
| 1116 | |
| 1117 | bool |
| 1118 | is_elfv2_localentry0(const Sized_relobj_file<size, big_endian>* object, |
| 1119 | unsigned int r_sym) const |
| 1120 | { |
| 1121 | const Powerpc_relobj<size, big_endian>* ppc_object |
| 1122 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); |
| 1123 | |
| 1124 | if (size == 64 |
| 1125 | && this->abiversion() >= 2 |
| 1126 | && this->plt_localentry0() |
| 1127 | && ppc_object->st_other(r_sym) >> 5 == 0) |
| 1128 | { |
| 1129 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); |
| 1130 | bool is_ordinary; |
| 1131 | if (!psymval->is_ifunc_symbol() |
| 1132 | && psymval->input_shndx(&is_ordinary) != elfcpp::SHN_UNDEF |
| 1133 | && is_ordinary) |
| 1134 | return true; |
| 1135 | } |
| 1136 | return false; |
| 1137 | } |
| 1138 | |
| 1139 | // Remember any symbols seen with non-zero localentry, even those |
| 1140 | // not providing a definition |
| 1141 | bool |
| 1142 | resolve(Symbol* to, const elfcpp::Sym<size, big_endian>& sym, Object*, |
| 1143 | const char*) |
| 1144 | { |
| 1145 | if (size == 64) |
| 1146 | { |
| 1147 | unsigned char st_other = sym.get_st_other(); |
| 1148 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) |
| 1149 | to->set_non_zero_localentry(); |
| 1150 | } |
| 1151 | // We haven't resolved anything, continue normal processing. |
| 1152 | return false; |
| 1153 | } |
| 1154 | |
| 1155 | int |
| 1156 | abiversion() const |
| 1157 | { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; } |
| 1158 | |
| 1159 | void |
| 1160 | set_abiversion(int ver) |
| 1161 | { |
| 1162 | elfcpp::Elf_Word flags = this->processor_specific_flags(); |
| 1163 | flags &= ~elfcpp::EF_PPC64_ABI; |
| 1164 | flags |= ver & elfcpp::EF_PPC64_ABI; |
| 1165 | this->set_processor_specific_flags(flags); |
| 1166 | } |
| 1167 | |
| 1168 | Symbol* |
| 1169 | tls_get_addr_opt() const |
| 1170 | { return this->tls_get_addr_opt_; } |
| 1171 | |
| 1172 | Symbol* |
| 1173 | tls_get_addr() const |
| 1174 | { return this->tls_get_addr_; } |
| 1175 | |
| 1176 | // If optimizing __tls_get_addr calls, whether this is the |
| 1177 | // "__tls_get_addr" symbol. |
| 1178 | bool |
| 1179 | is_tls_get_addr_opt(const Symbol* gsym) const |
| 1180 | { |
| 1181 | return this->tls_get_addr_opt_ && (gsym == this->tls_get_addr_ |
| 1182 | || gsym == this->tls_get_addr_opt_); |
| 1183 | } |
| 1184 | |
| 1185 | bool |
| 1186 | replace_tls_get_addr(const Symbol* gsym) const |
| 1187 | { return this->tls_get_addr_opt_ && gsym == this->tls_get_addr_; } |
| 1188 | |
| 1189 | void |
| 1190 | set_has_tls_get_addr_opt() |
| 1191 | { this->has_tls_get_addr_opt_ = true; } |
| 1192 | |
| 1193 | // Offset to toc save stack slot |
| 1194 | int |
| 1195 | stk_toc() const |
| 1196 | { return this->abiversion() < 2 ? 40 : 24; } |
| 1197 | |
| 1198 | // Offset to linker save stack slot. ELFv2 doesn't have a linker word, |
| 1199 | // so use the CR save slot. Used only by __tls_get_addr call stub, |
| 1200 | // relying on __tls_get_addr not saving CR itself. |
| 1201 | int |
| 1202 | stk_linker() const |
| 1203 | { return this->abiversion() < 2 ? 32 : 8; } |
| 1204 | |
| 1205 | // Merge object attributes from input object with those in the output. |
| 1206 | void |
| 1207 | merge_object_attributes(const char*, const Attributes_section_data*); |
| 1208 | |
| 1209 | private: |
| 1210 | |
| 1211 | class Track_tls |
| 1212 | { |
| 1213 | public: |
| 1214 | enum Tls_get_addr |
| 1215 | { |
| 1216 | NOT_EXPECTED = 0, |
| 1217 | EXPECTED = 1, |
| 1218 | SKIP = 2, |
| 1219 | NORMAL = 3 |
| 1220 | }; |
| 1221 | |
| 1222 | Track_tls() |
| 1223 | : tls_get_addr_state_(NOT_EXPECTED), |
| 1224 | relinfo_(NULL), relnum_(0), r_offset_(0) |
| 1225 | { } |
| 1226 | |
| 1227 | ~Track_tls() |
| 1228 | { |
| 1229 | if (this->tls_get_addr_state_ != NOT_EXPECTED) |
| 1230 | this->missing(); |
| 1231 | } |
| 1232 | |
| 1233 | void |
| 1234 | missing(void) |
| 1235 | { |
| 1236 | if (this->relinfo_ != NULL) |
| 1237 | gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_, |
| 1238 | _("missing expected __tls_get_addr call")); |
| 1239 | } |
| 1240 | |
| 1241 | void |
| 1242 | expect_tls_get_addr_call( |
| 1243 | const Relocate_info<size, big_endian>* relinfo, |
| 1244 | size_t relnum, |
| 1245 | Address r_offset) |
| 1246 | { |
| 1247 | this->tls_get_addr_state_ = EXPECTED; |
| 1248 | this->relinfo_ = relinfo; |
| 1249 | this->relnum_ = relnum; |
| 1250 | this->r_offset_ = r_offset; |
| 1251 | } |
| 1252 | |
| 1253 | void |
| 1254 | expect_tls_get_addr_call() |
| 1255 | { this->tls_get_addr_state_ = EXPECTED; } |
| 1256 | |
| 1257 | void |
| 1258 | skip_next_tls_get_addr_call() |
| 1259 | {this->tls_get_addr_state_ = SKIP; } |
| 1260 | |
| 1261 | Tls_get_addr |
| 1262 | maybe_skip_tls_get_addr_call(Target_powerpc<size, big_endian>* target, |
| 1263 | unsigned int r_type, const Symbol* gsym) |
| 1264 | { |
| 1265 | bool is_tls_call |
| 1266 | = ((r_type == elfcpp::R_POWERPC_REL24 |
| 1267 | || (size == 64 && r_type == elfcpp::R_PPC64_REL24_NOTOC) |
| 1268 | || r_type == elfcpp::R_PPC_PLTREL24 |
| 1269 | || is_plt16_reloc<size>(r_type) |
| 1270 | || r_type == elfcpp::R_PPC64_PLT_PCREL34 |
| 1271 | || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC |
| 1272 | || r_type == elfcpp::R_POWERPC_PLTSEQ |
| 1273 | || r_type == elfcpp::R_POWERPC_PLTCALL |
| 1274 | || r_type == elfcpp::R_PPC64_PLTSEQ_NOTOC |
| 1275 | || r_type == elfcpp::R_PPC64_PLTCALL_NOTOC) |
| 1276 | && gsym != NULL |
| 1277 | && (gsym == target->tls_get_addr() |
| 1278 | || gsym == target->tls_get_addr_opt())); |
| 1279 | Tls_get_addr last_tls = this->tls_get_addr_state_; |
| 1280 | this->tls_get_addr_state_ = NOT_EXPECTED; |
| 1281 | if (is_tls_call && last_tls != EXPECTED) |
| 1282 | return last_tls; |
| 1283 | else if (!is_tls_call && last_tls != NOT_EXPECTED) |
| 1284 | { |
| 1285 | this->missing(); |
| 1286 | return EXPECTED; |
| 1287 | } |
| 1288 | return NORMAL; |
| 1289 | } |
| 1290 | |
| 1291 | private: |
| 1292 | // What we're up to regarding calls to __tls_get_addr. |
| 1293 | // On powerpc, the branch and link insn making a call to |
| 1294 | // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD, |
| 1295 | // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the |
| 1296 | // usual R_POWERPC_REL24 or R_PPC_PLTREL24 relocation on a call. |
| 1297 | // The marker relocation always comes first, and has the same |
| 1298 | // symbol as the reloc on the insn setting up the __tls_get_addr |
| 1299 | // argument. This ties the arg setup insn with the call insn, |
| 1300 | // allowing ld to safely optimize away the call. We check that |
| 1301 | // every call to __tls_get_addr has a marker relocation, and that |
| 1302 | // every marker relocation is on a call to __tls_get_addr. |
| 1303 | Tls_get_addr tls_get_addr_state_; |
| 1304 | // Info about the last reloc for error message. |
| 1305 | const Relocate_info<size, big_endian>* relinfo_; |
| 1306 | size_t relnum_; |
| 1307 | Address r_offset_; |
| 1308 | }; |
| 1309 | |
| 1310 | // The class which scans relocations. |
| 1311 | class Scan : protected Track_tls |
| 1312 | { |
| 1313 | public: |
| 1314 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 1315 | |
| 1316 | Scan() |
| 1317 | : Track_tls(), issued_non_pic_error_(false) |
| 1318 | { } |
| 1319 | |
| 1320 | static inline int |
| 1321 | get_reference_flags(unsigned int r_type, const Target_powerpc* target); |
| 1322 | |
| 1323 | inline void |
| 1324 | local(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
| 1325 | Sized_relobj_file<size, big_endian>* object, |
| 1326 | unsigned int data_shndx, |
| 1327 | Output_section* output_section, |
| 1328 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, |
| 1329 | const elfcpp::Sym<size, big_endian>& lsym, |
| 1330 | bool is_discarded); |
| 1331 | |
| 1332 | inline void |
| 1333 | global(Symbol_table* symtab, Layout* layout, Target_powerpc* target, |
| 1334 | Sized_relobj_file<size, big_endian>* object, |
| 1335 | unsigned int data_shndx, |
| 1336 | Output_section* output_section, |
| 1337 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, |
| 1338 | Symbol* gsym); |
| 1339 | |
| 1340 | inline bool |
| 1341 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 1342 | Target_powerpc* , |
| 1343 | Sized_relobj_file<size, big_endian>* relobj, |
| 1344 | unsigned int , |
| 1345 | Output_section* , |
| 1346 | const elfcpp::Rela<size, big_endian>& , |
| 1347 | unsigned int r_type, |
| 1348 | const elfcpp::Sym<size, big_endian>&) |
| 1349 | { |
| 1350 | // PowerPC64 .opd is not folded, so any identical function text |
| 1351 | // may be folded and we'll still keep function addresses distinct. |
| 1352 | // That means no reloc is of concern here. |
| 1353 | if (size == 64) |
| 1354 | { |
| 1355 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
| 1356 | <Powerpc_relobj<size, big_endian>*>(relobj); |
| 1357 | if (ppcobj->abiversion() == 1) |
| 1358 | return false; |
| 1359 | } |
| 1360 | // For 32-bit and ELFv2, conservatively assume anything but calls to |
| 1361 | // function code might be taking the address of the function. |
| 1362 | return !is_branch_reloc<size>(r_type); |
| 1363 | } |
| 1364 | |
| 1365 | inline bool |
| 1366 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , |
| 1367 | Target_powerpc* , |
| 1368 | Sized_relobj_file<size, big_endian>* relobj, |
| 1369 | unsigned int , |
| 1370 | Output_section* , |
| 1371 | const elfcpp::Rela<size, big_endian>& , |
| 1372 | unsigned int r_type, |
| 1373 | Symbol*) |
| 1374 | { |
| 1375 | // As above. |
| 1376 | if (size == 64) |
| 1377 | { |
| 1378 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
| 1379 | <Powerpc_relobj<size, big_endian>*>(relobj); |
| 1380 | if (ppcobj->abiversion() == 1) |
| 1381 | return false; |
| 1382 | } |
| 1383 | return !is_branch_reloc<size>(r_type); |
| 1384 | } |
| 1385 | |
| 1386 | static bool |
| 1387 | reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target, |
| 1388 | Sized_relobj_file<size, big_endian>* object, |
| 1389 | unsigned int r_type, bool report_err); |
| 1390 | |
| 1391 | private: |
| 1392 | static void |
| 1393 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, |
| 1394 | unsigned int r_type); |
| 1395 | |
| 1396 | static void |
| 1397 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, |
| 1398 | unsigned int r_type, Symbol*); |
| 1399 | |
| 1400 | static void |
| 1401 | generate_tls_call(Symbol_table* symtab, Layout* layout, |
| 1402 | Target_powerpc* target); |
| 1403 | |
| 1404 | void |
| 1405 | check_non_pic(Relobj*, unsigned int r_type); |
| 1406 | |
| 1407 | // Whether we have issued an error about a non-PIC compilation. |
| 1408 | bool issued_non_pic_error_; |
| 1409 | }; |
| 1410 | |
| 1411 | bool |
| 1412 | symval_for_branch(const Symbol_table* symtab, |
| 1413 | const Sized_symbol<size>* gsym, |
| 1414 | Powerpc_relobj<size, big_endian>* object, |
| 1415 | Address *value, unsigned int *dest_shndx); |
| 1416 | |
| 1417 | // The class which implements relocation. |
| 1418 | class Relocate : protected Track_tls |
| 1419 | { |
| 1420 | public: |
| 1421 | // Use 'at' branch hints when true, 'y' when false. |
| 1422 | // FIXME maybe: set this with an option. |
| 1423 | static const bool is_isa_v2 = true; |
| 1424 | |
| 1425 | Relocate() |
| 1426 | : Track_tls() |
| 1427 | { } |
| 1428 | |
| 1429 | // Do a relocation. Return false if the caller should not issue |
| 1430 | // any warnings about this relocation. |
| 1431 | inline bool |
| 1432 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
| 1433 | Target_powerpc*, Output_section*, size_t, const unsigned char*, |
| 1434 | const Sized_symbol<size>*, const Symbol_value<size>*, |
| 1435 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, |
| 1436 | section_size_type); |
| 1437 | }; |
| 1438 | |
| 1439 | class Relocate_comdat_behavior |
| 1440 | { |
| 1441 | public: |
| 1442 | // Decide what the linker should do for relocations that refer to |
| 1443 | // discarded comdat sections. |
| 1444 | inline Comdat_behavior |
| 1445 | get(const char* name) |
| 1446 | { |
| 1447 | gold::Default_comdat_behavior default_behavior; |
| 1448 | Comdat_behavior ret = default_behavior.get(name); |
| 1449 | if (ret == CB_ERROR) |
| 1450 | { |
| 1451 | if (size == 32 |
| 1452 | && (strcmp(name, ".fixup") == 0 |
| 1453 | || strcmp(name, ".got2") == 0)) |
| 1454 | ret = CB_IGNORE; |
| 1455 | if (size == 64 |
| 1456 | && (strcmp(name, ".opd") == 0 |
| 1457 | || strcmp(name, ".toc") == 0 |
| 1458 | || strcmp(name, ".toc1") == 0)) |
| 1459 | ret = CB_IGNORE; |
| 1460 | } |
| 1461 | return ret; |
| 1462 | } |
| 1463 | }; |
| 1464 | |
| 1465 | // Optimize the TLS relocation type based on what we know about the |
| 1466 | // symbol. IS_FINAL is true if the final address of this symbol is |
| 1467 | // known at link time. |
| 1468 | |
| 1469 | tls::Tls_optimization |
| 1470 | optimize_tls_gd(bool is_final) |
| 1471 | { |
| 1472 | // If we are generating a shared library, then we can't do anything |
| 1473 | // in the linker. |
| 1474 | if (parameters->options().shared() |
| 1475 | || !parameters->options().tls_optimize()) |
| 1476 | return tls::TLSOPT_NONE; |
| 1477 | |
| 1478 | if (!is_final) |
| 1479 | return tls::TLSOPT_TO_IE; |
| 1480 | return tls::TLSOPT_TO_LE; |
| 1481 | } |
| 1482 | |
| 1483 | tls::Tls_optimization |
| 1484 | optimize_tls_ld() |
| 1485 | { |
| 1486 | if (parameters->options().shared() |
| 1487 | || !parameters->options().tls_optimize()) |
| 1488 | return tls::TLSOPT_NONE; |
| 1489 | |
| 1490 | return tls::TLSOPT_TO_LE; |
| 1491 | } |
| 1492 | |
| 1493 | tls::Tls_optimization |
| 1494 | optimize_tls_ie(bool is_final) |
| 1495 | { |
| 1496 | if (!is_final |
| 1497 | || parameters->options().shared() |
| 1498 | || !parameters->options().tls_optimize()) |
| 1499 | return tls::TLSOPT_NONE; |
| 1500 | |
| 1501 | return tls::TLSOPT_TO_LE; |
| 1502 | } |
| 1503 | |
| 1504 | // Create glink. |
| 1505 | void |
| 1506 | make_glink_section(Layout*); |
| 1507 | |
| 1508 | // Create the PLT section. |
| 1509 | void |
| 1510 | make_plt_section(Symbol_table*, Layout*); |
| 1511 | |
| 1512 | void |
| 1513 | make_iplt_section(Symbol_table*, Layout*); |
| 1514 | |
| 1515 | void |
| 1516 | make_lplt_section(Layout*); |
| 1517 | |
| 1518 | void |
| 1519 | make_brlt_section(Layout*); |
| 1520 | |
| 1521 | // Create a PLT entry for a global symbol. |
| 1522 | void |
| 1523 | make_plt_entry(Symbol_table*, Layout*, Symbol*); |
| 1524 | |
| 1525 | // Create a PLT entry for a local IFUNC symbol. |
| 1526 | void |
| 1527 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
| 1528 | Sized_relobj_file<size, big_endian>*, |
| 1529 | unsigned int); |
| 1530 | |
| 1531 | // Create a PLT entry for a local non-IFUNC symbol. |
| 1532 | void |
| 1533 | make_local_plt_entry(Layout*, |
| 1534 | Sized_relobj_file<size, big_endian>*, |
| 1535 | unsigned int); |
| 1536 | |
| 1537 | |
| 1538 | // Create a GOT entry for local dynamic __tls_get_addr. |
| 1539 | unsigned int |
| 1540 | tlsld_got_offset(Symbol_table* symtab, Layout* layout, |
| 1541 | Sized_relobj_file<size, big_endian>* object); |
| 1542 | |
| 1543 | unsigned int |
| 1544 | tlsld_got_offset() const |
| 1545 | { |
| 1546 | return this->tlsld_got_offset_; |
| 1547 | } |
| 1548 | |
| 1549 | // Get the dynamic reloc section, creating it if necessary. |
| 1550 | Reloc_section* |
| 1551 | rela_dyn_section(Layout*); |
| 1552 | |
| 1553 | // Similarly, but for ifunc symbols get the one for ifunc. |
| 1554 | Reloc_section* |
| 1555 | rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc); |
| 1556 | |
| 1557 | // Copy a relocation against a global symbol. |
| 1558 | void |
| 1559 | copy_reloc(Symbol_table* symtab, Layout* layout, |
| 1560 | Sized_relobj_file<size, big_endian>* object, |
| 1561 | unsigned int shndx, Output_section* output_section, |
| 1562 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) |
| 1563 | { |
| 1564 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
| 1565 | this->copy_relocs_.copy_reloc(symtab, layout, |
| 1566 | symtab->get_sized_symbol<size>(sym), |
| 1567 | object, shndx, output_section, |
| 1568 | r_type, reloc.get_r_offset(), |
| 1569 | reloc.get_r_addend(), |
| 1570 | this->rela_dyn_section(layout)); |
| 1571 | } |
| 1572 | |
| 1573 | // Look over all the input sections, deciding where to place stubs. |
| 1574 | void |
| 1575 | group_sections(Layout*, const Task*, bool); |
| 1576 | |
| 1577 | // Sort output sections by address. |
| 1578 | struct Sort_sections |
| 1579 | { |
| 1580 | bool |
| 1581 | operator()(const Output_section* sec1, const Output_section* sec2) |
| 1582 | { return sec1->address() < sec2->address(); } |
| 1583 | }; |
| 1584 | |
| 1585 | class Branch_info |
| 1586 | { |
| 1587 | public: |
| 1588 | Branch_info(Powerpc_relobj<size, big_endian>* ppc_object, |
| 1589 | unsigned int data_shndx, |
| 1590 | Address r_offset, |
| 1591 | unsigned int r_type, |
| 1592 | unsigned int r_sym, |
| 1593 | Address addend) |
| 1594 | : object_(ppc_object), shndx_(data_shndx), offset_(r_offset), |
| 1595 | r_type_(r_type), tocsave_ (0), r_sym_(r_sym), addend_(addend) |
| 1596 | { } |
| 1597 | |
| 1598 | ~Branch_info() |
| 1599 | { } |
| 1600 | |
| 1601 | // Return whether this branch is going via a plt call stub, and if |
| 1602 | // so, mark it as having an R_PPC64_TOCSAVE. |
| 1603 | bool |
| 1604 | mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object, |
| 1605 | unsigned int shndx, Address offset, |
| 1606 | Target_powerpc* target, Symbol_table* symtab); |
| 1607 | |
| 1608 | // If this branch needs a plt call stub, or a long branch stub, make one. |
| 1609 | bool |
| 1610 | make_stub(Stub_table<size, big_endian>*, |
| 1611 | Stub_table<size, big_endian>*, |
| 1612 | Symbol_table*) const; |
| 1613 | |
| 1614 | private: |
| 1615 | // The branch location.. |
| 1616 | Powerpc_relobj<size, big_endian>* object_; |
| 1617 | unsigned int shndx_; |
| 1618 | Address offset_; |
| 1619 | // ..and the branch type and destination. |
| 1620 | unsigned int r_type_ : 31; |
| 1621 | unsigned int tocsave_ : 1; |
| 1622 | unsigned int r_sym_; |
| 1623 | Address addend_; |
| 1624 | }; |
| 1625 | |
| 1626 | // Information about this specific target which we pass to the |
| 1627 | // general Target structure. |
| 1628 | static Target::Target_info powerpc_info; |
| 1629 | |
| 1630 | // The types of GOT entries needed for this platform. |
| 1631 | // These values are exposed to the ABI in an incremental link. |
| 1632 | // Do not renumber existing values without changing the version |
| 1633 | // number of the .gnu_incremental_inputs section. |
| 1634 | enum Got_type |
| 1635 | { |
| 1636 | GOT_TYPE_STANDARD, |
| 1637 | GOT_TYPE_TLSGD, // double entry for @got@tlsgd |
| 1638 | GOT_TYPE_DTPREL, // entry for @got@dtprel |
| 1639 | GOT_TYPE_TPREL // entry for @got@tprel |
| 1640 | }; |
| 1641 | |
| 1642 | // The GOT section. |
| 1643 | Output_data_got_powerpc<size, big_endian>* got_; |
| 1644 | // The PLT section. This is a container for a table of addresses, |
| 1645 | // and their relocations. Each address in the PLT has a dynamic |
| 1646 | // relocation (R_*_JMP_SLOT) and each address will have a |
| 1647 | // corresponding entry in .glink for lazy resolution of the PLT. |
| 1648 | // ppc32 initialises the PLT to point at the .glink entry, while |
| 1649 | // ppc64 leaves this to ld.so. To make a call via the PLT, the |
| 1650 | // linker adds a stub that loads the PLT entry into ctr then |
| 1651 | // branches to ctr. There may be more than one stub for each PLT |
| 1652 | // entry. DT_JMPREL points at the first PLT dynamic relocation and |
| 1653 | // DT_PLTRELSZ gives the total size of PLT dynamic relocations. |
| 1654 | Output_data_plt_powerpc<size, big_endian>* plt_; |
| 1655 | // The IPLT section. Like plt_, this is a container for a table of |
| 1656 | // addresses and their relocations, specifically for STT_GNU_IFUNC |
| 1657 | // functions that resolve locally (STT_GNU_IFUNC functions that |
| 1658 | // don't resolve locally go in PLT). Unlike plt_, these have no |
| 1659 | // entry in .glink for lazy resolution, and the relocation section |
| 1660 | // does not have a 1-1 correspondence with IPLT addresses. In fact, |
| 1661 | // the relocation section may contain relocations against |
| 1662 | // STT_GNU_IFUNC symbols at locations outside of IPLT. The |
| 1663 | // relocation section will appear at the end of other dynamic |
| 1664 | // relocations, so that ld.so applies these relocations after other |
| 1665 | // dynamic relocations. In a static executable, the relocation |
| 1666 | // section is emitted and marked with __rela_iplt_start and |
| 1667 | // __rela_iplt_end symbols. |
| 1668 | Output_data_plt_powerpc<size, big_endian>* iplt_; |
| 1669 | // A PLT style section for local, non-ifunc symbols |
| 1670 | Output_data_plt_powerpc<size, big_endian>* lplt_; |
| 1671 | // Section holding long branch destinations. |
| 1672 | Output_data_brlt_powerpc<size, big_endian>* brlt_section_; |
| 1673 | // The .glink section. |
| 1674 | Output_data_glink<size, big_endian>* glink_; |
| 1675 | // The dynamic reloc section. |
| 1676 | Reloc_section* rela_dyn_; |
| 1677 | // Relocs saved to avoid a COPY reloc. |
| 1678 | Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
| 1679 | // Offset of the GOT entry for local dynamic __tls_get_addr calls. |
| 1680 | unsigned int tlsld_got_offset_; |
| 1681 | |
| 1682 | Stub_tables stub_tables_; |
| 1683 | typedef Unordered_map<Address, unsigned int> Branch_lookup_table; |
| 1684 | Branch_lookup_table branch_lookup_table_; |
| 1685 | |
| 1686 | typedef std::vector<Branch_info> Branches; |
| 1687 | Branches branch_info_; |
| 1688 | Tocsave_loc tocsave_loc_; |
| 1689 | |
| 1690 | bool powerxx_stubs_; |
| 1691 | bool plt_thread_safe_; |
| 1692 | bool plt_localentry0_; |
| 1693 | bool plt_localentry0_init_; |
| 1694 | bool has_localentry0_; |
| 1695 | bool has_tls_get_addr_opt_; |
| 1696 | |
| 1697 | bool relax_failed_; |
| 1698 | int relax_fail_count_; |
| 1699 | int32_t stub_group_size_; |
| 1700 | |
| 1701 | Output_data_save_res<size, big_endian> *savres_section_; |
| 1702 | |
| 1703 | // The "__tls_get_addr" symbol, if present |
| 1704 | Symbol* tls_get_addr_; |
| 1705 | // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol. |
| 1706 | Symbol* tls_get_addr_opt_; |
| 1707 | |
| 1708 | // Attributes in output. |
| 1709 | Attributes_section_data* attributes_section_data_; |
| 1710 | |
| 1711 | // Last input file to change various attribute tags |
| 1712 | const char* last_fp_; |
| 1713 | const char* last_ld_; |
| 1714 | const char* last_vec_; |
| 1715 | const char* last_struct_; |
| 1716 | }; |
| 1717 | |
| 1718 | template<> |
| 1719 | Target::Target_info Target_powerpc<32, true>::powerpc_info = |
| 1720 | { |
| 1721 | 32, // size |
| 1722 | true, // is_big_endian |
| 1723 | elfcpp::EM_PPC, // machine_code |
| 1724 | false, // has_make_symbol |
| 1725 | false, // has_resolve |
| 1726 | false, // has_code_fill |
| 1727 | true, // is_default_stack_executable |
| 1728 | false, // can_icf_inline_merge_sections |
| 1729 | '\0', // wrap_char |
| 1730 | "/usr/lib/ld.so.1", // dynamic_linker |
| 1731 | 0x10000000, // default_text_segment_address |
| 1732 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 1733 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
| 1734 | false, // isolate_execinstr |
| 1735 | 0, // rosegment_gap |
| 1736 | elfcpp::SHN_UNDEF, // small_common_shndx |
| 1737 | elfcpp::SHN_UNDEF, // large_common_shndx |
| 1738 | 0, // small_common_section_flags |
| 1739 | 0, // large_common_section_flags |
| 1740 | NULL, // attributes_section |
| 1741 | NULL, // attributes_vendor |
| 1742 | "_start", // entry_symbol_name |
| 1743 | 32, // hash_entry_size |
| 1744 | elfcpp::SHT_PROGBITS, // unwind_section_type |
| 1745 | }; |
| 1746 | |
| 1747 | template<> |
| 1748 | Target::Target_info Target_powerpc<32, false>::powerpc_info = |
| 1749 | { |
| 1750 | 32, // size |
| 1751 | false, // is_big_endian |
| 1752 | elfcpp::EM_PPC, // machine_code |
| 1753 | false, // has_make_symbol |
| 1754 | false, // has_resolve |
| 1755 | false, // has_code_fill |
| 1756 | true, // is_default_stack_executable |
| 1757 | false, // can_icf_inline_merge_sections |
| 1758 | '\0', // wrap_char |
| 1759 | "/usr/lib/ld.so.1", // dynamic_linker |
| 1760 | 0x10000000, // default_text_segment_address |
| 1761 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 1762 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
| 1763 | false, // isolate_execinstr |
| 1764 | 0, // rosegment_gap |
| 1765 | elfcpp::SHN_UNDEF, // small_common_shndx |
| 1766 | elfcpp::SHN_UNDEF, // large_common_shndx |
| 1767 | 0, // small_common_section_flags |
| 1768 | 0, // large_common_section_flags |
| 1769 | NULL, // attributes_section |
| 1770 | NULL, // attributes_vendor |
| 1771 | "_start", // entry_symbol_name |
| 1772 | 32, // hash_entry_size |
| 1773 | elfcpp::SHT_PROGBITS, // unwind_section_type |
| 1774 | }; |
| 1775 | |
| 1776 | template<> |
| 1777 | Target::Target_info Target_powerpc<64, true>::powerpc_info = |
| 1778 | { |
| 1779 | 64, // size |
| 1780 | true, // is_big_endian |
| 1781 | elfcpp::EM_PPC64, // machine_code |
| 1782 | false, // has_make_symbol |
| 1783 | true, // has_resolve |
| 1784 | false, // has_code_fill |
| 1785 | false, // is_default_stack_executable |
| 1786 | false, // can_icf_inline_merge_sections |
| 1787 | '\0', // wrap_char |
| 1788 | "/usr/lib/ld.so.1", // dynamic_linker |
| 1789 | 0x10000000, // default_text_segment_address |
| 1790 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 1791 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
| 1792 | false, // isolate_execinstr |
| 1793 | 0, // rosegment_gap |
| 1794 | elfcpp::SHN_UNDEF, // small_common_shndx |
| 1795 | elfcpp::SHN_UNDEF, // large_common_shndx |
| 1796 | 0, // small_common_section_flags |
| 1797 | 0, // large_common_section_flags |
| 1798 | NULL, // attributes_section |
| 1799 | NULL, // attributes_vendor |
| 1800 | "_start", // entry_symbol_name |
| 1801 | 32, // hash_entry_size |
| 1802 | elfcpp::SHT_PROGBITS, // unwind_section_type |
| 1803 | }; |
| 1804 | |
| 1805 | template<> |
| 1806 | Target::Target_info Target_powerpc<64, false>::powerpc_info = |
| 1807 | { |
| 1808 | 64, // size |
| 1809 | false, // is_big_endian |
| 1810 | elfcpp::EM_PPC64, // machine_code |
| 1811 | false, // has_make_symbol |
| 1812 | true, // has_resolve |
| 1813 | false, // has_code_fill |
| 1814 | false, // is_default_stack_executable |
| 1815 | false, // can_icf_inline_merge_sections |
| 1816 | '\0', // wrap_char |
| 1817 | "/usr/lib/ld.so.1", // dynamic_linker |
| 1818 | 0x10000000, // default_text_segment_address |
| 1819 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 1820 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) |
| 1821 | false, // isolate_execinstr |
| 1822 | 0, // rosegment_gap |
| 1823 | elfcpp::SHN_UNDEF, // small_common_shndx |
| 1824 | elfcpp::SHN_UNDEF, // large_common_shndx |
| 1825 | 0, // small_common_section_flags |
| 1826 | 0, // large_common_section_flags |
| 1827 | NULL, // attributes_section |
| 1828 | NULL, // attributes_vendor |
| 1829 | "_start", // entry_symbol_name |
| 1830 | 32, // hash_entry_size |
| 1831 | elfcpp::SHT_PROGBITS, // unwind_section_type |
| 1832 | }; |
| 1833 | |
| 1834 | template<int size> |
| 1835 | inline bool |
| 1836 | is_branch_reloc(unsigned int r_type) |
| 1837 | { |
| 1838 | return (r_type == elfcpp::R_POWERPC_REL24 |
| 1839 | || (size == 64 && r_type == elfcpp::R_PPC64_REL24_NOTOC) |
| 1840 | || r_type == elfcpp::R_PPC_PLTREL24 |
| 1841 | || r_type == elfcpp::R_PPC_LOCAL24PC |
| 1842 | || r_type == elfcpp::R_POWERPC_REL14 |
| 1843 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN |
| 1844 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN |
| 1845 | || r_type == elfcpp::R_POWERPC_ADDR24 |
| 1846 | || r_type == elfcpp::R_POWERPC_ADDR14 |
| 1847 | || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN |
| 1848 | || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN); |
| 1849 | } |
| 1850 | |
| 1851 | // Reloc resolves to plt entry. |
| 1852 | template<int size> |
| 1853 | inline bool |
| 1854 | is_plt16_reloc(unsigned int r_type) |
| 1855 | { |
| 1856 | return (r_type == elfcpp::R_POWERPC_PLT16_LO |
| 1857 | || r_type == elfcpp::R_POWERPC_PLT16_HI |
| 1858 | || r_type == elfcpp::R_POWERPC_PLT16_HA |
| 1859 | || (size == 64 && r_type == elfcpp::R_PPC64_PLT16_LO_DS)); |
| 1860 | } |
| 1861 | |
| 1862 | // If INSN is an opcode that may be used with an @tls operand, return |
| 1863 | // the transformed insn for TLS optimisation, otherwise return 0. If |
| 1864 | // REG is non-zero only match an insn with RB or RA equal to REG. |
| 1865 | uint32_t |
| 1866 | at_tls_transform(uint32_t insn, unsigned int reg) |
| 1867 | { |
| 1868 | if ((insn & (0x3f << 26)) != 31 << 26) |
| 1869 | return 0; |
| 1870 | |
| 1871 | unsigned int rtra; |
| 1872 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) |
| 1873 | rtra = insn & ((1 << 26) - (1 << 16)); |
| 1874 | else if (((insn >> 16) & 0x1f) == reg) |
| 1875 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); |
| 1876 | else |
| 1877 | return 0; |
| 1878 | |
| 1879 | if ((insn & (0x3ff << 1)) == 266 << 1) |
| 1880 | // add -> addi |
| 1881 | insn = 14 << 26; |
| 1882 | else if ((insn & (0x1f << 1)) == 23 << 1 |
| 1883 | && ((insn & (0x1f << 6)) < 14 << 6 |
| 1884 | || ((insn & (0x1f << 6)) >= 16 << 6 |
| 1885 | && (insn & (0x1f << 6)) < 24 << 6))) |
| 1886 | // load and store indexed -> dform |
| 1887 | insn = (32 | ((insn >> 6) & 0x1f)) << 26; |
| 1888 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) |
| 1889 | // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu |
| 1890 | insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); |
| 1891 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) |
| 1892 | // lwax -> lwa |
| 1893 | insn = (58 << 26) | 2; |
| 1894 | else |
| 1895 | return 0; |
| 1896 | insn |= rtra; |
| 1897 | return insn; |
| 1898 | } |
| 1899 | |
| 1900 | |
| 1901 | template<int size, bool big_endian> |
| 1902 | class Powerpc_relocate_functions |
| 1903 | { |
| 1904 | public: |
| 1905 | enum Overflow_check |
| 1906 | { |
| 1907 | CHECK_NONE, |
| 1908 | CHECK_SIGNED, |
| 1909 | CHECK_UNSIGNED, |
| 1910 | CHECK_BITFIELD, |
| 1911 | CHECK_LOW_INSN, |
| 1912 | CHECK_HIGH_INSN |
| 1913 | }; |
| 1914 | |
| 1915 | enum Status |
| 1916 | { |
| 1917 | STATUS_OK, |
| 1918 | STATUS_OVERFLOW |
| 1919 | }; |
| 1920 | |
| 1921 | private: |
| 1922 | typedef Powerpc_relocate_functions<size, big_endian> This; |
| 1923 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 1924 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress; |
| 1925 | |
| 1926 | template<int valsize> |
| 1927 | static inline bool |
| 1928 | has_overflow_signed(Address value) |
| 1929 | { |
| 1930 | // limit = 1 << (valsize - 1) without shift count exceeding size of type |
| 1931 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); |
| 1932 | limit <<= ((valsize - 1) >> 1); |
| 1933 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); |
| 1934 | return value + limit > (limit << 1) - 1; |
| 1935 | } |
| 1936 | |
| 1937 | template<int valsize> |
| 1938 | static inline bool |
| 1939 | has_overflow_unsigned(Address value) |
| 1940 | { |
| 1941 | Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1); |
| 1942 | limit <<= ((valsize - 1) >> 1); |
| 1943 | limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1)); |
| 1944 | return value > (limit << 1) - 1; |
| 1945 | } |
| 1946 | |
| 1947 | template<int valsize> |
| 1948 | static inline bool |
| 1949 | has_overflow_bitfield(Address value) |
| 1950 | { |
| 1951 | return (has_overflow_unsigned<valsize>(value) |
| 1952 | && has_overflow_signed<valsize>(value)); |
| 1953 | } |
| 1954 | |
| 1955 | template<int valsize> |
| 1956 | static inline Status |
| 1957 | overflowed(Address value, Overflow_check overflow) |
| 1958 | { |
| 1959 | if (overflow == CHECK_SIGNED) |
| 1960 | { |
| 1961 | if (has_overflow_signed<valsize>(value)) |
| 1962 | return STATUS_OVERFLOW; |
| 1963 | } |
| 1964 | else if (overflow == CHECK_UNSIGNED) |
| 1965 | { |
| 1966 | if (has_overflow_unsigned<valsize>(value)) |
| 1967 | return STATUS_OVERFLOW; |
| 1968 | } |
| 1969 | else if (overflow == CHECK_BITFIELD) |
| 1970 | { |
| 1971 | if (has_overflow_bitfield<valsize>(value)) |
| 1972 | return STATUS_OVERFLOW; |
| 1973 | } |
| 1974 | return STATUS_OK; |
| 1975 | } |
| 1976 | |
| 1977 | // Do a simple RELA relocation |
| 1978 | template<int fieldsize, int valsize> |
| 1979 | static inline Status |
| 1980 | rela(unsigned char* view, Address value, Overflow_check overflow) |
| 1981 | { |
| 1982 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
| 1983 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1984 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value); |
| 1985 | return overflowed<valsize>(value, overflow); |
| 1986 | } |
| 1987 | |
| 1988 | template<int fieldsize, int valsize> |
| 1989 | static inline Status |
| 1990 | rela(unsigned char* view, |
| 1991 | unsigned int right_shift, |
| 1992 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
| 1993 | Address value, |
| 1994 | Overflow_check overflow) |
| 1995 | { |
| 1996 | typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype; |
| 1997 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 1998 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv); |
| 1999 | if (overflow == CHECK_SIGNED) |
| 2000 | value = static_cast<SignedAddress>(value) >> right_shift; |
| 2001 | else |
| 2002 | value = value >> right_shift; |
| 2003 | Valtype reloc = value; |
| 2004 | val &= ~dst_mask; |
| 2005 | reloc &= dst_mask; |
| 2006 | elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc); |
| 2007 | return overflowed<valsize>(value, overflow); |
| 2008 | } |
| 2009 | |
| 2010 | // Do a simple RELA relocation, unaligned. |
| 2011 | template<int fieldsize, int valsize> |
| 2012 | static inline Status |
| 2013 | rela_ua(unsigned char* view, Address value, Overflow_check overflow) |
| 2014 | { |
| 2015 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value); |
| 2016 | return overflowed<valsize>(value, overflow); |
| 2017 | } |
| 2018 | |
| 2019 | template<int fieldsize, int valsize> |
| 2020 | static inline Status |
| 2021 | rela_ua(unsigned char* view, |
| 2022 | unsigned int right_shift, |
| 2023 | typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask, |
| 2024 | Address value, |
| 2025 | Overflow_check overflow) |
| 2026 | { |
| 2027 | typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype |
| 2028 | Valtype; |
| 2029 | Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view); |
| 2030 | if (overflow == CHECK_SIGNED) |
| 2031 | value = static_cast<SignedAddress>(value) >> right_shift; |
| 2032 | else |
| 2033 | value = value >> right_shift; |
| 2034 | Valtype reloc = value; |
| 2035 | val &= ~dst_mask; |
| 2036 | reloc &= dst_mask; |
| 2037 | elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc); |
| 2038 | return overflowed<valsize>(value, overflow); |
| 2039 | } |
| 2040 | |
| 2041 | public: |
| 2042 | // R_PPC64_ADDR64: (Symbol + Addend) |
| 2043 | static inline void |
| 2044 | addr64(unsigned char* view, Address value) |
| 2045 | { This::template rela<64,64>(view, value, CHECK_NONE); } |
| 2046 | |
| 2047 | // R_PPC64_UADDR64: (Symbol + Addend) unaligned |
| 2048 | static inline void |
| 2049 | addr64_u(unsigned char* view, Address value) |
| 2050 | { This::template rela_ua<64,64>(view, value, CHECK_NONE); } |
| 2051 | |
| 2052 | // R_POWERPC_ADDR32: (Symbol + Addend) |
| 2053 | static inline Status |
| 2054 | addr32(unsigned char* view, Address value, Overflow_check overflow) |
| 2055 | { return This::template rela<32,32>(view, value, overflow); } |
| 2056 | |
| 2057 | // R_POWERPC_UADDR32: (Symbol + Addend) unaligned |
| 2058 | static inline Status |
| 2059 | addr32_u(unsigned char* view, Address value, Overflow_check overflow) |
| 2060 | { return This::template rela_ua<32,32>(view, value, overflow); } |
| 2061 | |
| 2062 | // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc |
| 2063 | static inline Status |
| 2064 | addr24(unsigned char* view, Address value, Overflow_check overflow) |
| 2065 | { |
| 2066 | Status stat = This::template rela<32,26>(view, 0, 0x03fffffc, |
| 2067 | value, overflow); |
| 2068 | if (overflow != CHECK_NONE && (value & 3) != 0) |
| 2069 | stat = STATUS_OVERFLOW; |
| 2070 | return stat; |
| 2071 | } |
| 2072 | |
| 2073 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff |
| 2074 | static inline Status |
| 2075 | addr16(unsigned char* view, Address value, Overflow_check overflow) |
| 2076 | { return This::template rela<16,16>(view, value, overflow); } |
| 2077 | |
| 2078 | // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned |
| 2079 | static inline Status |
| 2080 | addr16_u(unsigned char* view, Address value, Overflow_check overflow) |
| 2081 | { return This::template rela_ua<16,16>(view, value, overflow); } |
| 2082 | |
| 2083 | // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc |
| 2084 | static inline Status |
| 2085 | addr16_ds(unsigned char* view, Address value, Overflow_check overflow) |
| 2086 | { |
| 2087 | Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow); |
| 2088 | if ((value & 3) != 0) |
| 2089 | stat = STATUS_OVERFLOW; |
| 2090 | return stat; |
| 2091 | } |
| 2092 | |
| 2093 | // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0 |
| 2094 | static inline Status |
| 2095 | addr16_dq(unsigned char* view, Address value, Overflow_check overflow) |
| 2096 | { |
| 2097 | Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow); |
| 2098 | if ((value & 15) != 0) |
| 2099 | stat = STATUS_OVERFLOW; |
| 2100 | return stat; |
| 2101 | } |
| 2102 | |
| 2103 | // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff |
| 2104 | static inline void |
| 2105 | addr16_hi(unsigned char* view, Address value) |
| 2106 | { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); } |
| 2107 | |
| 2108 | // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff |
| 2109 | static inline void |
| 2110 | addr16_ha(unsigned char* view, Address value) |
| 2111 | { This::addr16_hi(view, value + 0x8000); } |
| 2112 | |
| 2113 | // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff |
| 2114 | static inline void |
| 2115 | addr16_hi2(unsigned char* view, Address value) |
| 2116 | { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); } |
| 2117 | |
| 2118 | // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff |
| 2119 | static inline void |
| 2120 | addr16_ha2(unsigned char* view, Address value) |
| 2121 | { This::addr16_hi2(view, value + 0x8000); } |
| 2122 | |
| 2123 | // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff |
| 2124 | static inline void |
| 2125 | addr16_hi3(unsigned char* view, Address value) |
| 2126 | { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); } |
| 2127 | |
| 2128 | // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff |
| 2129 | static inline void |
| 2130 | addr16_ha3(unsigned char* view, Address value) |
| 2131 | { This::addr16_hi3(view, value + 0x8000); } |
| 2132 | |
| 2133 | // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc |
| 2134 | static inline Status |
| 2135 | addr14(unsigned char* view, Address value, Overflow_check overflow) |
| 2136 | { |
| 2137 | Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow); |
| 2138 | if (overflow != CHECK_NONE && (value & 3) != 0) |
| 2139 | stat = STATUS_OVERFLOW; |
| 2140 | return stat; |
| 2141 | } |
| 2142 | |
| 2143 | // R_POWERPC_REL16DX_HA |
| 2144 | static inline Status |
| 2145 | addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow) |
| 2146 | { |
| 2147 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 2148 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 2149 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); |
| 2150 | value += 0x8000; |
| 2151 | value = static_cast<SignedAddress>(value) >> 16; |
| 2152 | val |= (value & 0xffc1) | ((value & 0x3e) << 15); |
| 2153 | elfcpp::Swap<32, big_endian>::writeval(wv, val); |
| 2154 | return overflowed<16>(value, overflow); |
| 2155 | } |
| 2156 | |
| 2157 | // R_PPC64_D34 |
| 2158 | static inline Status |
| 2159 | addr34(unsigned char *view, uint64_t value, Overflow_check overflow) |
| 2160 | { |
| 2161 | Status stat = This::template rela<32,18>(view, 16, 0x3ffff, |
| 2162 | value, overflow); |
| 2163 | This::rela<32,16>(view + 4, 0, 0xffff, value, CHECK_NONE); |
| 2164 | return stat; |
| 2165 | } |
| 2166 | |
| 2167 | // R_PPC64_D34_HI30 |
| 2168 | static inline void |
| 2169 | addr34_hi(unsigned char *view, uint64_t value) |
| 2170 | { This::addr34(view, value >> 34, CHECK_NONE);} |
| 2171 | |
| 2172 | // R_PPC64_D34_HA30 |
| 2173 | static inline void |
| 2174 | addr34_ha(unsigned char *view, uint64_t value) |
| 2175 | { This::addr34_hi(view, value + (1ULL << 33));} |
| 2176 | |
| 2177 | // R_PPC64_D28 |
| 2178 | static inline Status |
| 2179 | addr28(unsigned char *view, uint64_t value, Overflow_check overflow) |
| 2180 | { |
| 2181 | Status stat = This::template rela<32,12>(view, 16, 0xfff, |
| 2182 | value, overflow); |
| 2183 | This::rela<32,16>(view + 4, 0, 0xffff, value, CHECK_NONE); |
| 2184 | return stat; |
| 2185 | } |
| 2186 | |
| 2187 | // R_PPC64_ADDR16_HIGHER34 |
| 2188 | static inline void |
| 2189 | addr16_higher34(unsigned char* view, uint64_t value) |
| 2190 | { This::addr16(view, value >> 34, CHECK_NONE); } |
| 2191 | |
| 2192 | // R_PPC64_ADDR16_HIGHERA34 |
| 2193 | static inline void |
| 2194 | addr16_highera34(unsigned char* view, uint64_t value) |
| 2195 | { This::addr16_higher34(view, value + (1ULL << 33)); } |
| 2196 | |
| 2197 | // R_PPC64_ADDR16_HIGHEST34 |
| 2198 | static inline void |
| 2199 | addr16_highest34(unsigned char* view, uint64_t value) |
| 2200 | { This::addr16(view, value >> 50, CHECK_NONE); } |
| 2201 | |
| 2202 | // R_PPC64_ADDR16_HIGHESTA34 |
| 2203 | static inline void |
| 2204 | addr16_highesta34(unsigned char* view, uint64_t value) |
| 2205 | { This::addr16_highest34(view, value + (1ULL << 33)); } |
| 2206 | }; |
| 2207 | |
| 2208 | // Set ABI version for input and output. |
| 2209 | |
| 2210 | template<int size, bool big_endian> |
| 2211 | void |
| 2212 | Powerpc_relobj<size, big_endian>::set_abiversion(int ver) |
| 2213 | { |
| 2214 | this->e_flags_ |= ver; |
| 2215 | if (this->abiversion() != 0) |
| 2216 | { |
| 2217 | Target_powerpc<size, big_endian>* target = |
| 2218 | static_cast<Target_powerpc<size, big_endian>*>( |
| 2219 | parameters->sized_target<size, big_endian>()); |
| 2220 | if (target->abiversion() == 0) |
| 2221 | target->set_abiversion(this->abiversion()); |
| 2222 | else if (target->abiversion() != this->abiversion()) |
| 2223 | gold_error(_("%s: ABI version %d is not compatible " |
| 2224 | "with ABI version %d output"), |
| 2225 | this->name().c_str(), |
| 2226 | this->abiversion(), target->abiversion()); |
| 2227 | |
| 2228 | } |
| 2229 | } |
| 2230 | |
| 2231 | // Stash away the index of .got2, .opd, .rela.toc, and .toc in a |
| 2232 | // relocatable object, if such sections exists. |
| 2233 | |
| 2234 | template<int size, bool big_endian> |
| 2235 | bool |
| 2236 | Powerpc_relobj<size, big_endian>::do_find_special_sections( |
| 2237 | Read_symbols_data* sd) |
| 2238 | { |
| 2239 | const unsigned char* const pshdrs = sd->section_headers->data(); |
| 2240 | const unsigned char* namesu = sd->section_names->data(); |
| 2241 | const char* names = reinterpret_cast<const char*>(namesu); |
| 2242 | section_size_type names_size = sd->section_names_size; |
| 2243 | const unsigned char* s; |
| 2244 | |
| 2245 | s = this->template find_shdr<size, big_endian>(pshdrs, |
| 2246 | size == 32 ? ".got2" : ".opd", |
| 2247 | names, names_size, NULL); |
| 2248 | if (s != NULL) |
| 2249 | { |
| 2250 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; |
| 2251 | this->special_ = ndx; |
| 2252 | if (size == 64) |
| 2253 | { |
| 2254 | if (this->abiversion() == 0) |
| 2255 | this->set_abiversion(1); |
| 2256 | else if (this->abiversion() > 1) |
| 2257 | gold_error(_("%s: .opd invalid in abiv%d"), |
| 2258 | this->name().c_str(), this->abiversion()); |
| 2259 | } |
| 2260 | } |
| 2261 | if (size == 64) |
| 2262 | { |
| 2263 | s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc", |
| 2264 | names, names_size, NULL); |
| 2265 | if (s != NULL) |
| 2266 | { |
| 2267 | unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size; |
| 2268 | this->relatoc_ = ndx; |
| 2269 | typename elfcpp::Shdr<size, big_endian> shdr(s); |
| 2270 | this->toc_ = this->adjust_shndx(shdr.get_sh_info()); |
| 2271 | } |
| 2272 | } |
| 2273 | return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd); |
| 2274 | } |
| 2275 | |
| 2276 | // Examine .rela.opd to build info about function entry points. |
| 2277 | |
| 2278 | template<int size, bool big_endian> |
| 2279 | void |
| 2280 | Powerpc_relobj<size, big_endian>::scan_opd_relocs( |
| 2281 | size_t reloc_count, |
| 2282 | const unsigned char* prelocs, |
| 2283 | const unsigned char* plocal_syms) |
| 2284 | { |
| 2285 | if (size == 64) |
| 2286 | { |
| 2287 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
| 2288 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 2289 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 2290 | Address expected_off = 0; |
| 2291 | bool regular = true; |
| 2292 | unsigned int opd_ent_size = 0; |
| 2293 | |
| 2294 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
| 2295 | { |
| 2296 | Reltype reloc(prelocs); |
| 2297 | typename elfcpp::Elf_types<size>::Elf_WXword r_info |
| 2298 | = reloc.get_r_info(); |
| 2299 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); |
| 2300 | if (r_type == elfcpp::R_PPC64_ADDR64) |
| 2301 | { |
| 2302 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 2303 | typename elfcpp::Elf_types<size>::Elf_Addr value; |
| 2304 | bool is_ordinary; |
| 2305 | unsigned int shndx; |
| 2306 | if (r_sym < this->local_symbol_count()) |
| 2307 | { |
| 2308 | typename elfcpp::Sym<size, big_endian> |
| 2309 | lsym(plocal_syms + r_sym * sym_size); |
| 2310 | shndx = lsym.get_st_shndx(); |
| 2311 | shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary); |
| 2312 | value = lsym.get_st_value(); |
| 2313 | } |
| 2314 | else |
| 2315 | shndx = this->symbol_section_and_value(r_sym, &value, |
| 2316 | &is_ordinary); |
| 2317 | this->set_opd_ent(reloc.get_r_offset(), shndx, |
| 2318 | value + reloc.get_r_addend()); |
| 2319 | if (i == 2) |
| 2320 | { |
| 2321 | expected_off = reloc.get_r_offset(); |
| 2322 | opd_ent_size = expected_off; |
| 2323 | } |
| 2324 | else if (expected_off != reloc.get_r_offset()) |
| 2325 | regular = false; |
| 2326 | expected_off += opd_ent_size; |
| 2327 | } |
| 2328 | else if (r_type == elfcpp::R_PPC64_TOC) |
| 2329 | { |
| 2330 | if (expected_off - opd_ent_size + 8 != reloc.get_r_offset()) |
| 2331 | regular = false; |
| 2332 | } |
| 2333 | else |
| 2334 | { |
| 2335 | gold_warning(_("%s: unexpected reloc type %u in .opd section"), |
| 2336 | this->name().c_str(), r_type); |
| 2337 | regular = false; |
| 2338 | } |
| 2339 | } |
| 2340 | if (reloc_count <= 2) |
| 2341 | opd_ent_size = this->section_size(this->opd_shndx()); |
| 2342 | if (opd_ent_size != 24 && opd_ent_size != 16) |
| 2343 | regular = false; |
| 2344 | if (!regular) |
| 2345 | { |
| 2346 | gold_warning(_("%s: .opd is not a regular array of opd entries"), |
| 2347 | this->name().c_str()); |
| 2348 | opd_ent_size = 0; |
| 2349 | } |
| 2350 | } |
| 2351 | } |
| 2352 | |
| 2353 | // Returns true if a code sequence loading the TOC entry at VALUE |
| 2354 | // relative to the TOC pointer can be converted into code calculating |
| 2355 | // a TOC pointer relative offset. |
| 2356 | // If so, the TOC pointer relative offset is stored to VALUE. |
| 2357 | |
| 2358 | template<int size, bool big_endian> |
| 2359 | bool |
| 2360 | Powerpc_relobj<size, big_endian>::make_toc_relative( |
| 2361 | Target_powerpc<size, big_endian>* target, |
| 2362 | Address* value) |
| 2363 | { |
| 2364 | if (size != 64) |
| 2365 | return false; |
| 2366 | |
| 2367 | // With -mcmodel=medium code it is quite possible to have |
| 2368 | // toc-relative relocs referring to objects outside the TOC. |
| 2369 | // Don't try to look at a non-existent TOC. |
| 2370 | if (this->toc_shndx() == 0) |
| 2371 | return false; |
| 2372 | |
| 2373 | // Convert VALUE back to an address by adding got_base (see below), |
| 2374 | // then to an offset in the TOC by subtracting the TOC output |
| 2375 | // section address and the TOC output offset. Since this TOC output |
| 2376 | // section and the got output section are one and the same, we can |
| 2377 | // omit adding and subtracting the output section address. |
| 2378 | Address off = (*value + this->toc_base_offset() |
| 2379 | - this->output_section_offset(this->toc_shndx())); |
| 2380 | // Is this offset in the TOC? -mcmodel=medium code may be using |
| 2381 | // TOC relative access to variables outside the TOC. Those of |
| 2382 | // course can't be optimized. We also don't try to optimize code |
| 2383 | // that is using a different object's TOC. |
| 2384 | if (off >= this->section_size(this->toc_shndx())) |
| 2385 | return false; |
| 2386 | |
| 2387 | if (this->no_toc_opt(off)) |
| 2388 | return false; |
| 2389 | |
| 2390 | section_size_type vlen; |
| 2391 | unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen); |
| 2392 | Address addr = elfcpp::Swap<size, big_endian>::readval(view + off); |
| 2393 | // The TOC pointer |
| 2394 | Address got_base = (target->got_section()->output_section()->address() |
| 2395 | + this->toc_base_offset()); |
| 2396 | addr -= got_base; |
| 2397 | if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32) |
| 2398 | return false; |
| 2399 | |
| 2400 | *value = addr; |
| 2401 | return true; |
| 2402 | } |
| 2403 | |
| 2404 | template<int size, bool big_endian> |
| 2405 | bool |
| 2406 | Powerpc_relobj<size, big_endian>::make_got_relative( |
| 2407 | Target_powerpc<size, big_endian>* target, |
| 2408 | const Symbol_value<size>* psymval, |
| 2409 | Address addend, |
| 2410 | Address* value) |
| 2411 | { |
| 2412 | Address addr = psymval->value(this, addend); |
| 2413 | Address got_base = (target->got_section()->output_section()->address() |
| 2414 | + this->toc_base_offset()); |
| 2415 | addr -= got_base; |
| 2416 | if (addr + 0x80008000 > 0xffffffff) |
| 2417 | return false; |
| 2418 | |
| 2419 | *value = addr; |
| 2420 | return true; |
| 2421 | } |
| 2422 | |
| 2423 | // Perform the Sized_relobj_file method, then set up opd info from |
| 2424 | // .opd relocs. |
| 2425 | |
| 2426 | template<int size, bool big_endian> |
| 2427 | void |
| 2428 | Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd) |
| 2429 | { |
| 2430 | Sized_relobj_file<size, big_endian>::do_read_relocs(rd); |
| 2431 | if (size == 64) |
| 2432 | { |
| 2433 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); |
| 2434 | p != rd->relocs.end(); |
| 2435 | ++p) |
| 2436 | { |
| 2437 | if (p->data_shndx == this->opd_shndx()) |
| 2438 | { |
| 2439 | uint64_t opd_size = this->section_size(this->opd_shndx()); |
| 2440 | gold_assert(opd_size == static_cast<size_t>(opd_size)); |
| 2441 | if (opd_size != 0) |
| 2442 | { |
| 2443 | this->init_opd(opd_size); |
| 2444 | this->scan_opd_relocs(p->reloc_count, p->contents->data(), |
| 2445 | rd->local_symbols->data()); |
| 2446 | } |
| 2447 | break; |
| 2448 | } |
| 2449 | } |
| 2450 | } |
| 2451 | } |
| 2452 | |
| 2453 | // Read the symbols then set up st_other vector. |
| 2454 | |
| 2455 | template<int size, bool big_endian> |
| 2456 | void |
| 2457 | Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) |
| 2458 | { |
| 2459 | this->base_read_symbols(sd); |
| 2460 | if (this->input_file()->format() != Input_file::FORMAT_ELF) |
| 2461 | return; |
| 2462 | if (size == 64) |
| 2463 | { |
| 2464 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; |
| 2465 | const unsigned char* const pshdrs = sd->section_headers->data(); |
| 2466 | const unsigned int loccount = this->do_local_symbol_count(); |
| 2467 | if (loccount != 0) |
| 2468 | { |
| 2469 | this->st_other_.resize(loccount); |
| 2470 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
| 2471 | off_t locsize = loccount * sym_size; |
| 2472 | const unsigned int symtab_shndx = this->symtab_shndx(); |
| 2473 | const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size; |
| 2474 | typename elfcpp::Shdr<size, big_endian> shdr(psymtab); |
| 2475 | const unsigned char* psyms = this->get_view(shdr.get_sh_offset(), |
| 2476 | locsize, true, false); |
| 2477 | psyms += sym_size; |
| 2478 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) |
| 2479 | { |
| 2480 | elfcpp::Sym<size, big_endian> sym(psyms); |
| 2481 | unsigned char st_other = sym.get_st_other(); |
| 2482 | this->st_other_[i] = st_other; |
| 2483 | if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0) |
| 2484 | { |
| 2485 | if (this->abiversion() == 0) |
| 2486 | this->set_abiversion(2); |
| 2487 | else if (this->abiversion() < 2) |
| 2488 | gold_error(_("%s: local symbol %d has invalid st_other" |
| 2489 | " for ABI version 1"), |
| 2490 | this->name().c_str(), i); |
| 2491 | } |
| 2492 | } |
| 2493 | } |
| 2494 | } |
| 2495 | |
| 2496 | const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size; |
| 2497 | const unsigned char* ps = sd->section_headers->data() + shdr_size; |
| 2498 | bool merge_attributes = false; |
| 2499 | for (unsigned int i = 1; i < this->shnum(); ++i, ps += shdr_size) |
| 2500 | { |
| 2501 | elfcpp::Shdr<size, big_endian> shdr(ps); |
| 2502 | switch (shdr.get_sh_type()) |
| 2503 | { |
| 2504 | case elfcpp::SHT_GNU_ATTRIBUTES: |
| 2505 | { |
| 2506 | gold_assert(this->attributes_section_data_ == NULL); |
| 2507 | section_offset_type section_offset = shdr.get_sh_offset(); |
| 2508 | section_size_type section_size = |
| 2509 | convert_to_section_size_type(shdr.get_sh_size()); |
| 2510 | const unsigned char* view = |
| 2511 | this->get_view(section_offset, section_size, true, false); |
| 2512 | this->attributes_section_data_ = |
| 2513 | new Attributes_section_data(view, section_size); |
| 2514 | } |
| 2515 | break; |
| 2516 | |
| 2517 | case elfcpp::SHT_SYMTAB: |
| 2518 | { |
| 2519 | // Sometimes an object has no contents except the section |
| 2520 | // name string table and an empty symbol table with the |
| 2521 | // undefined symbol. We don't want to merge |
| 2522 | // processor-specific flags from such an object. |
| 2523 | const typename elfcpp::Elf_types<size>::Elf_WXword sym_size = |
| 2524 | elfcpp::Elf_sizes<size>::sym_size; |
| 2525 | if (shdr.get_sh_size() > sym_size) |
| 2526 | merge_attributes = true; |
| 2527 | } |
| 2528 | break; |
| 2529 | |
| 2530 | case elfcpp::SHT_STRTAB: |
| 2531 | break; |
| 2532 | |
| 2533 | default: |
| 2534 | merge_attributes = true; |
| 2535 | break; |
| 2536 | } |
| 2537 | } |
| 2538 | |
| 2539 | if (!merge_attributes) |
| 2540 | { |
| 2541 | // Should rarely happen. |
| 2542 | delete this->attributes_section_data_; |
| 2543 | this->attributes_section_data_ = NULL; |
| 2544 | } |
| 2545 | } |
| 2546 | |
| 2547 | template<int size, bool big_endian> |
| 2548 | void |
| 2549 | Powerpc_dynobj<size, big_endian>::set_abiversion(int ver) |
| 2550 | { |
| 2551 | this->e_flags_ |= ver; |
| 2552 | if (this->abiversion() != 0) |
| 2553 | { |
| 2554 | Target_powerpc<size, big_endian>* target = |
| 2555 | static_cast<Target_powerpc<size, big_endian>*>( |
| 2556 | parameters->sized_target<size, big_endian>()); |
| 2557 | if (target->abiversion() == 0) |
| 2558 | target->set_abiversion(this->abiversion()); |
| 2559 | else if (target->abiversion() != this->abiversion()) |
| 2560 | gold_error(_("%s: ABI version %d is not compatible " |
| 2561 | "with ABI version %d output"), |
| 2562 | this->name().c_str(), |
| 2563 | this->abiversion(), target->abiversion()); |
| 2564 | |
| 2565 | } |
| 2566 | } |
| 2567 | |
| 2568 | // Call Sized_dynobj::base_read_symbols to read the symbols then |
| 2569 | // read .opd from a dynamic object, filling in opd_ent_ vector, |
| 2570 | |
| 2571 | template<int size, bool big_endian> |
| 2572 | void |
| 2573 | Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) |
| 2574 | { |
| 2575 | this->base_read_symbols(sd); |
| 2576 | const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size; |
| 2577 | const unsigned char* ps = |
| 2578 | sd->section_headers->data() + shdr_size * (this->shnum() - 1); |
| 2579 | for (unsigned int i = this->shnum(); i > 0; --i, ps -= shdr_size) |
| 2580 | { |
| 2581 | elfcpp::Shdr<size, big_endian> shdr(ps); |
| 2582 | if (shdr.get_sh_type() == elfcpp::SHT_GNU_ATTRIBUTES) |
| 2583 | { |
| 2584 | section_offset_type section_offset = shdr.get_sh_offset(); |
| 2585 | section_size_type section_size = |
| 2586 | convert_to_section_size_type(shdr.get_sh_size()); |
| 2587 | const unsigned char* view = |
| 2588 | this->get_view(section_offset, section_size, true, false); |
| 2589 | this->attributes_section_data_ = |
| 2590 | new Attributes_section_data(view, section_size); |
| 2591 | break; |
| 2592 | } |
| 2593 | } |
| 2594 | if (size == 64) |
| 2595 | { |
| 2596 | const unsigned char* const pshdrs = sd->section_headers->data(); |
| 2597 | const unsigned char* namesu = sd->section_names->data(); |
| 2598 | const char* names = reinterpret_cast<const char*>(namesu); |
| 2599 | const unsigned char* s = NULL; |
| 2600 | const unsigned char* opd; |
| 2601 | section_size_type opd_size; |
| 2602 | |
| 2603 | // Find and read .opd section. |
| 2604 | while (1) |
| 2605 | { |
| 2606 | s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names, |
| 2607 | sd->section_names_size, |
| 2608 | s); |
| 2609 | if (s == NULL) |
| 2610 | return; |
| 2611 | |
| 2612 | typename elfcpp::Shdr<size, big_endian> shdr(s); |
| 2613 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS |
| 2614 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0) |
| 2615 | { |
| 2616 | if (this->abiversion() == 0) |
| 2617 | this->set_abiversion(1); |
| 2618 | else if (this->abiversion() > 1) |
| 2619 | gold_error(_("%s: .opd invalid in abiv%d"), |
| 2620 | this->name().c_str(), this->abiversion()); |
| 2621 | |
| 2622 | this->opd_shndx_ = (s - pshdrs) / shdr_size; |
| 2623 | this->opd_address_ = shdr.get_sh_addr(); |
| 2624 | opd_size = convert_to_section_size_type(shdr.get_sh_size()); |
| 2625 | opd = this->get_view(shdr.get_sh_offset(), opd_size, |
| 2626 | true, false); |
| 2627 | break; |
| 2628 | } |
| 2629 | } |
| 2630 | |
| 2631 | // Build set of executable sections. |
| 2632 | // Using a set is probably overkill. There is likely to be only |
| 2633 | // a few executable sections, typically .init, .text and .fini, |
| 2634 | // and they are generally grouped together. |
| 2635 | typedef std::set<Sec_info> Exec_sections; |
| 2636 | Exec_sections exec_sections; |
| 2637 | s = pshdrs; |
| 2638 | for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size) |
| 2639 | { |
| 2640 | typename elfcpp::Shdr<size, big_endian> shdr(s); |
| 2641 | if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS |
| 2642 | && ((shdr.get_sh_flags() |
| 2643 | & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) |
| 2644 | == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) |
| 2645 | && shdr.get_sh_size() != 0) |
| 2646 | { |
| 2647 | exec_sections.insert(Sec_info(shdr.get_sh_addr(), |
| 2648 | shdr.get_sh_size(), i)); |
| 2649 | } |
| 2650 | } |
| 2651 | if (exec_sections.empty()) |
| 2652 | return; |
| 2653 | |
| 2654 | // Look over the OPD entries. This is complicated by the fact |
| 2655 | // that some binaries will use two-word entries while others |
| 2656 | // will use the standard three-word entries. In most cases |
| 2657 | // the third word (the environment pointer for languages like |
| 2658 | // Pascal) is unused and will be zero. If the third word is |
| 2659 | // used it should not be pointing into executable sections, |
| 2660 | // I think. |
| 2661 | this->init_opd(opd_size); |
| 2662 | for (const unsigned char* p = opd; p < opd + opd_size; p += 8) |
| 2663 | { |
| 2664 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype; |
| 2665 | const Valtype* valp = reinterpret_cast<const Valtype*>(p); |
| 2666 | Valtype val = elfcpp::Swap<64, big_endian>::readval(valp); |
| 2667 | if (val == 0) |
| 2668 | // Chances are that this is the third word of an OPD entry. |
| 2669 | continue; |
| 2670 | typename Exec_sections::const_iterator e |
| 2671 | = exec_sections.upper_bound(Sec_info(val, 0, 0)); |
| 2672 | if (e != exec_sections.begin()) |
| 2673 | { |
| 2674 | --e; |
| 2675 | if (e->start <= val && val < e->start + e->len) |
| 2676 | { |
| 2677 | // We have an address in an executable section. |
| 2678 | // VAL ought to be the function entry, set it up. |
| 2679 | this->set_opd_ent(p - opd, e->shndx, val); |
| 2680 | // Skip second word of OPD entry, the TOC pointer. |
| 2681 | p += 8; |
| 2682 | } |
| 2683 | } |
| 2684 | // If we didn't match any executable sections, we likely |
| 2685 | // have a non-zero third word in the OPD entry. |
| 2686 | } |
| 2687 | } |
| 2688 | } |
| 2689 | |
| 2690 | // Relocate sections. |
| 2691 | |
| 2692 | template<int size, bool big_endian> |
| 2693 | void |
| 2694 | Powerpc_relobj<size, big_endian>::do_relocate_sections( |
| 2695 | const Symbol_table* symtab, const Layout* layout, |
| 2696 | const unsigned char* pshdrs, Output_file* of, |
| 2697 | typename Sized_relobj_file<size, big_endian>::Views* pviews) |
| 2698 | { |
| 2699 | unsigned int start = 1; |
| 2700 | if (size == 64 |
| 2701 | && this->relatoc_ != 0 |
| 2702 | && !parameters->options().relocatable()) |
| 2703 | { |
| 2704 | // Relocate .toc first. |
| 2705 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, |
| 2706 | this->relatoc_, this->relatoc_); |
| 2707 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, |
| 2708 | 1, this->relatoc_ - 1); |
| 2709 | start = this->relatoc_ + 1; |
| 2710 | } |
| 2711 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, |
| 2712 | start, this->shnum() - 1); |
| 2713 | |
| 2714 | if (!parameters->options().output_is_position_independent()) |
| 2715 | { |
| 2716 | Target_powerpc<size, big_endian>* target |
| 2717 | = static_cast<Target_powerpc<size, big_endian>*>( |
| 2718 | parameters->sized_target<size, big_endian>()); |
| 2719 | if (target->lplt_section() && target->lplt_section()->data_size() != 0) |
| 2720 | { |
| 2721 | const section_size_type offset = target->lplt_section()->offset(); |
| 2722 | const section_size_type oview_size |
| 2723 | = convert_to_section_size_type(target->lplt_section()->data_size()); |
| 2724 | unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 2725 | |
| 2726 | bool modified = false; |
| 2727 | unsigned int nsyms = this->local_symbol_count(); |
| 2728 | for (unsigned int i = 0; i < nsyms; i++) |
| 2729 | if (this->local_has_plt_offset(i)) |
| 2730 | { |
| 2731 | Address value = this->local_symbol_value(i, 0); |
| 2732 | if (size == 64) |
| 2733 | value += ppc64_local_entry_offset(i); |
| 2734 | size_t off = this->local_plt_offset(i); |
| 2735 | elfcpp::Swap<size, big_endian>::writeval(oview + off, value); |
| 2736 | modified = true; |
| 2737 | } |
| 2738 | if (modified) |
| 2739 | of->write_output_view(offset, oview_size, oview); |
| 2740 | } |
| 2741 | } |
| 2742 | } |
| 2743 | |
| 2744 | // Set up some symbols. |
| 2745 | |
| 2746 | template<int size, bool big_endian> |
| 2747 | void |
| 2748 | Target_powerpc<size, big_endian>::do_define_standard_symbols( |
| 2749 | Symbol_table* symtab, |
| 2750 | Layout* layout) |
| 2751 | { |
| 2752 | if (size == 32) |
| 2753 | { |
| 2754 | // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as |
| 2755 | // undefined when scanning relocs (and thus requires |
| 2756 | // non-relative dynamic relocs). The proper value will be |
| 2757 | // updated later. |
| 2758 | Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
| 2759 | if (gotsym != NULL && gotsym->is_undefined()) |
| 2760 | { |
| 2761 | Target_powerpc<size, big_endian>* target = |
| 2762 | static_cast<Target_powerpc<size, big_endian>*>( |
| 2763 | parameters->sized_target<size, big_endian>()); |
| 2764 | Output_data_got_powerpc<size, big_endian>* got |
| 2765 | = target->got_section(symtab, layout); |
| 2766 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
| 2767 | Symbol_table::PREDEFINED, |
| 2768 | got, 0, 0, |
| 2769 | elfcpp::STT_OBJECT, |
| 2770 | elfcpp::STB_LOCAL, |
| 2771 | elfcpp::STV_HIDDEN, 0, |
| 2772 | false, false); |
| 2773 | } |
| 2774 | |
| 2775 | // Define _SDA_BASE_ at the start of the .sdata section + 32768. |
| 2776 | Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL); |
| 2777 | if (sdasym != NULL && sdasym->is_undefined()) |
| 2778 | { |
| 2779 | Output_data_space* sdata = new Output_data_space(4, "** sdata"); |
| 2780 | Output_section* os |
| 2781 | = layout->add_output_section_data(".sdata", 0, |
| 2782 | elfcpp::SHF_ALLOC |
| 2783 | | elfcpp::SHF_WRITE, |
| 2784 | sdata, ORDER_SMALL_DATA, false); |
| 2785 | symtab->define_in_output_data("_SDA_BASE_", NULL, |
| 2786 | Symbol_table::PREDEFINED, |
| 2787 | os, 32768, 0, elfcpp::STT_OBJECT, |
| 2788 | elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, |
| 2789 | 0, false, false); |
| 2790 | } |
| 2791 | } |
| 2792 | else |
| 2793 | { |
| 2794 | // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_ |
| 2795 | Symbol *gotsym = symtab->lookup(".TOC.", NULL); |
| 2796 | if (gotsym != NULL && gotsym->is_undefined()) |
| 2797 | { |
| 2798 | Target_powerpc<size, big_endian>* target = |
| 2799 | static_cast<Target_powerpc<size, big_endian>*>( |
| 2800 | parameters->sized_target<size, big_endian>()); |
| 2801 | Output_data_got_powerpc<size, big_endian>* got |
| 2802 | = target->got_section(symtab, layout); |
| 2803 | symtab->define_in_output_data(".TOC.", NULL, |
| 2804 | Symbol_table::PREDEFINED, |
| 2805 | got, 0x8000, 0, |
| 2806 | elfcpp::STT_OBJECT, |
| 2807 | elfcpp::STB_LOCAL, |
| 2808 | elfcpp::STV_HIDDEN, 0, |
| 2809 | false, false); |
| 2810 | } |
| 2811 | } |
| 2812 | |
| 2813 | this->tls_get_addr_ = symtab->lookup("__tls_get_addr"); |
| 2814 | if (parameters->options().tls_get_addr_optimize() |
| 2815 | && this->tls_get_addr_ != NULL |
| 2816 | && this->tls_get_addr_->in_reg()) |
| 2817 | this->tls_get_addr_opt_ = symtab->lookup("__tls_get_addr_opt"); |
| 2818 | if (this->tls_get_addr_opt_ != NULL) |
| 2819 | { |
| 2820 | if (this->tls_get_addr_->is_undefined() |
| 2821 | || this->tls_get_addr_->is_from_dynobj()) |
| 2822 | { |
| 2823 | // Make it seem as if references to __tls_get_addr are |
| 2824 | // really to __tls_get_addr_opt, so the latter symbol is |
| 2825 | // made dynamic, not the former. |
| 2826 | this->tls_get_addr_->clear_in_reg(); |
| 2827 | this->tls_get_addr_opt_->set_in_reg(); |
| 2828 | } |
| 2829 | // We have a non-dynamic definition for __tls_get_addr. |
| 2830 | // Make __tls_get_addr_opt the same, if it does not already have |
| 2831 | // a non-dynamic definition. |
| 2832 | else if (this->tls_get_addr_opt_->is_undefined() |
| 2833 | || this->tls_get_addr_opt_->is_from_dynobj()) |
| 2834 | { |
| 2835 | Sized_symbol<size>* from |
| 2836 | = static_cast<Sized_symbol<size>*>(this->tls_get_addr_); |
| 2837 | Sized_symbol<size>* to |
| 2838 | = static_cast<Sized_symbol<size>*>(this->tls_get_addr_opt_); |
| 2839 | symtab->clone<size>(to, from); |
| 2840 | } |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | // Set up PowerPC target specific relobj. |
| 2845 | |
| 2846 | template<int size, bool big_endian> |
| 2847 | Object* |
| 2848 | Target_powerpc<size, big_endian>::do_make_elf_object( |
| 2849 | const std::string& name, |
| 2850 | Input_file* input_file, |
| 2851 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) |
| 2852 | { |
| 2853 | int et = ehdr.get_e_type(); |
| 2854 | // ET_EXEC files are valid input for --just-symbols/-R, |
| 2855 | // and we treat them as relocatable objects. |
| 2856 | if (et == elfcpp::ET_REL |
| 2857 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) |
| 2858 | { |
| 2859 | Powerpc_relobj<size, big_endian>* obj = |
| 2860 | new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr); |
| 2861 | obj->setup(); |
| 2862 | return obj; |
| 2863 | } |
| 2864 | else if (et == elfcpp::ET_DYN) |
| 2865 | { |
| 2866 | Powerpc_dynobj<size, big_endian>* obj = |
| 2867 | new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr); |
| 2868 | obj->setup(); |
| 2869 | return obj; |
| 2870 | } |
| 2871 | else |
| 2872 | { |
| 2873 | gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et); |
| 2874 | return NULL; |
| 2875 | } |
| 2876 | } |
| 2877 | |
| 2878 | template<int size, bool big_endian> |
| 2879 | class Output_data_got_powerpc : public Output_data_got<size, big_endian> |
| 2880 | { |
| 2881 | public: |
| 2882 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; |
| 2883 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn; |
| 2884 | |
| 2885 | Output_data_got_powerpc(Symbol_table* symtab, Layout* layout) |
| 2886 | : Output_data_got<size, big_endian>(), |
| 2887 | symtab_(symtab), layout_(layout), |
| 2888 | header_ent_cnt_(size == 32 ? 3 : 1), |
| 2889 | header_index_(size == 32 ? 0x2000 : 0) |
| 2890 | { |
| 2891 | if (size == 64) |
| 2892 | this->set_addralign(256); |
| 2893 | } |
| 2894 | |
| 2895 | // Override all the Output_data_got methods we use so as to first call |
| 2896 | // reserve_ent(). |
| 2897 | bool |
| 2898 | add_global(Symbol* gsym, unsigned int got_type) |
| 2899 | { |
| 2900 | this->reserve_ent(); |
| 2901 | return Output_data_got<size, big_endian>::add_global(gsym, got_type); |
| 2902 | } |
| 2903 | |
| 2904 | bool |
| 2905 | add_global_plt(Symbol* gsym, unsigned int got_type) |
| 2906 | { |
| 2907 | this->reserve_ent(); |
| 2908 | return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type); |
| 2909 | } |
| 2910 | |
| 2911 | bool |
| 2912 | add_global_tls(Symbol* gsym, unsigned int got_type) |
| 2913 | { return this->add_global_plt(gsym, got_type); } |
| 2914 | |
| 2915 | void |
| 2916 | add_global_with_rel(Symbol* gsym, unsigned int got_type, |
| 2917 | Output_data_reloc_generic* rel_dyn, unsigned int r_type) |
| 2918 | { |
| 2919 | this->reserve_ent(); |
| 2920 | Output_data_got<size, big_endian>:: |
| 2921 | add_global_with_rel(gsym, got_type, rel_dyn, r_type); |
| 2922 | } |
| 2923 | |
| 2924 | void |
| 2925 | add_global_pair_with_rel(Symbol* gsym, unsigned int got_type, |
| 2926 | Output_data_reloc_generic* rel_dyn, |
| 2927 | unsigned int r_type_1, unsigned int r_type_2) |
| 2928 | { |
| 2929 | if (gsym->has_got_offset(got_type)) |
| 2930 | return; |
| 2931 | |
| 2932 | this->reserve_ent(2); |
| 2933 | Output_data_got<size, big_endian>:: |
| 2934 | add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2); |
| 2935 | } |
| 2936 | |
| 2937 | bool |
| 2938 | add_local(Relobj* object, unsigned int sym_index, unsigned int got_type) |
| 2939 | { |
| 2940 | this->reserve_ent(); |
| 2941 | return Output_data_got<size, big_endian>::add_local(object, sym_index, |
| 2942 | got_type); |
| 2943 | } |
| 2944 | |
| 2945 | bool |
| 2946 | add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type) |
| 2947 | { |
| 2948 | this->reserve_ent(); |
| 2949 | return Output_data_got<size, big_endian>::add_local_plt(object, sym_index, |
| 2950 | got_type); |
| 2951 | } |
| 2952 | |
| 2953 | bool |
| 2954 | add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type) |
| 2955 | { return this->add_local_plt(object, sym_index, got_type); } |
| 2956 | |
| 2957 | void |
| 2958 | add_local_tls_pair(Relobj* object, unsigned int sym_index, |
| 2959 | unsigned int got_type, |
| 2960 | Output_data_reloc_generic* rel_dyn, |
| 2961 | unsigned int r_type) |
| 2962 | { |
| 2963 | if (object->local_has_got_offset(sym_index, got_type)) |
| 2964 | return; |
| 2965 | |
| 2966 | this->reserve_ent(2); |
| 2967 | Output_data_got<size, big_endian>:: |
| 2968 | add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type); |
| 2969 | } |
| 2970 | |
| 2971 | unsigned int |
| 2972 | add_constant(Valtype constant) |
| 2973 | { |
| 2974 | this->reserve_ent(); |
| 2975 | return Output_data_got<size, big_endian>::add_constant(constant); |
| 2976 | } |
| 2977 | |
| 2978 | unsigned int |
| 2979 | add_constant_pair(Valtype c1, Valtype c2) |
| 2980 | { |
| 2981 | this->reserve_ent(2); |
| 2982 | return Output_data_got<size, big_endian>::add_constant_pair(c1, c2); |
| 2983 | } |
| 2984 | |
| 2985 | // Offset of _GLOBAL_OFFSET_TABLE_. |
| 2986 | unsigned int |
| 2987 | g_o_t() const |
| 2988 | { |
| 2989 | return this->got_offset(this->header_index_); |
| 2990 | } |
| 2991 | |
| 2992 | // Offset of base used to access the GOT/TOC. |
| 2993 | // The got/toc pointer reg will be set to this value. |
| 2994 | Valtype |
| 2995 | got_base_offset(const Powerpc_relobj<size, big_endian>* object) const |
| 2996 | { |
| 2997 | if (size == 32) |
| 2998 | return this->g_o_t(); |
| 2999 | else |
| 3000 | return (this->output_section()->address() |
| 3001 | + object->toc_base_offset() |
| 3002 | - this->address()); |
| 3003 | } |
| 3004 | |
| 3005 | // Ensure our GOT has a header. |
| 3006 | void |
| 3007 | set_final_data_size() |
| 3008 | { |
| 3009 | if (this->header_ent_cnt_ != 0) |
| 3010 | this->make_header(); |
| 3011 | Output_data_got<size, big_endian>::set_final_data_size(); |
| 3012 | } |
| 3013 | |
| 3014 | // First word of GOT header needs some values that are not |
| 3015 | // handled by Output_data_got so poke them in here. |
| 3016 | // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase. |
| 3017 | void |
| 3018 | do_write(Output_file* of) |
| 3019 | { |
| 3020 | Valtype val = 0; |
| 3021 | if (size == 32 && this->layout_->dynamic_data() != NULL) |
| 3022 | val = this->layout_->dynamic_section()->address(); |
| 3023 | if (size == 64) |
| 3024 | val = this->output_section()->address() + 0x8000; |
| 3025 | this->replace_constant(this->header_index_, val); |
| 3026 | Output_data_got<size, big_endian>::do_write(of); |
| 3027 | } |
| 3028 | |
| 3029 | private: |
| 3030 | void |
| 3031 | reserve_ent(unsigned int cnt = 1) |
| 3032 | { |
| 3033 | if (this->header_ent_cnt_ == 0) |
| 3034 | return; |
| 3035 | if (this->num_entries() + cnt > this->header_index_) |
| 3036 | this->make_header(); |
| 3037 | } |
| 3038 | |
| 3039 | void |
| 3040 | make_header() |
| 3041 | { |
| 3042 | this->header_ent_cnt_ = 0; |
| 3043 | this->header_index_ = this->num_entries(); |
| 3044 | if (size == 32) |
| 3045 | { |
| 3046 | Output_data_got<size, big_endian>::add_constant(0); |
| 3047 | Output_data_got<size, big_endian>::add_constant(0); |
| 3048 | Output_data_got<size, big_endian>::add_constant(0); |
| 3049 | |
| 3050 | // Define _GLOBAL_OFFSET_TABLE_ at the header |
| 3051 | Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL); |
| 3052 | if (gotsym != NULL) |
| 3053 | { |
| 3054 | Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym); |
| 3055 | sym->set_value(this->g_o_t()); |
| 3056 | } |
| 3057 | else |
| 3058 | this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
| 3059 | Symbol_table::PREDEFINED, |
| 3060 | this, this->g_o_t(), 0, |
| 3061 | elfcpp::STT_OBJECT, |
| 3062 | elfcpp::STB_LOCAL, |
| 3063 | elfcpp::STV_HIDDEN, 0, |
| 3064 | false, false); |
| 3065 | } |
| 3066 | else |
| 3067 | Output_data_got<size, big_endian>::add_constant(0); |
| 3068 | } |
| 3069 | |
| 3070 | // Stashed pointers. |
| 3071 | Symbol_table* symtab_; |
| 3072 | Layout* layout_; |
| 3073 | |
| 3074 | // GOT header size. |
| 3075 | unsigned int header_ent_cnt_; |
| 3076 | // GOT header index. |
| 3077 | unsigned int header_index_; |
| 3078 | }; |
| 3079 | |
| 3080 | // Get the GOT section, creating it if necessary. |
| 3081 | |
| 3082 | template<int size, bool big_endian> |
| 3083 | Output_data_got_powerpc<size, big_endian>* |
| 3084 | Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab, |
| 3085 | Layout* layout) |
| 3086 | { |
| 3087 | if (this->got_ == NULL) |
| 3088 | { |
| 3089 | gold_assert(symtab != NULL && layout != NULL); |
| 3090 | |
| 3091 | this->got_ |
| 3092 | = new Output_data_got_powerpc<size, big_endian>(symtab, layout); |
| 3093 | |
| 3094 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, |
| 3095 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, |
| 3096 | this->got_, ORDER_DATA, false); |
| 3097 | } |
| 3098 | |
| 3099 | return this->got_; |
| 3100 | } |
| 3101 | |
| 3102 | // Get the dynamic reloc section, creating it if necessary. |
| 3103 | |
| 3104 | template<int size, bool big_endian> |
| 3105 | typename Target_powerpc<size, big_endian>::Reloc_section* |
| 3106 | Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout) |
| 3107 | { |
| 3108 | if (this->rela_dyn_ == NULL) |
| 3109 | { |
| 3110 | gold_assert(layout != NULL); |
| 3111 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); |
| 3112 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, |
| 3113 | elfcpp::SHF_ALLOC, this->rela_dyn_, |
| 3114 | ORDER_DYNAMIC_RELOCS, false); |
| 3115 | } |
| 3116 | return this->rela_dyn_; |
| 3117 | } |
| 3118 | |
| 3119 | // Similarly, but for ifunc symbols get the one for ifunc. |
| 3120 | |
| 3121 | template<int size, bool big_endian> |
| 3122 | typename Target_powerpc<size, big_endian>::Reloc_section* |
| 3123 | Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab, |
| 3124 | Layout* layout, |
| 3125 | bool for_ifunc) |
| 3126 | { |
| 3127 | if (!for_ifunc) |
| 3128 | return this->rela_dyn_section(layout); |
| 3129 | |
| 3130 | if (this->iplt_ == NULL) |
| 3131 | this->make_iplt_section(symtab, layout); |
| 3132 | return this->iplt_->rel_plt(); |
| 3133 | } |
| 3134 | |
| 3135 | class Stub_control |
| 3136 | { |
| 3137 | public: |
| 3138 | // Determine the stub group size. The group size is the absolute |
| 3139 | // value of the parameter --stub-group-size. If --stub-group-size |
| 3140 | // is passed a negative value, we restrict stubs to be always after |
| 3141 | // the stubbed branches. |
| 3142 | Stub_control(int32_t size, bool no_size_errors, bool multi_os) |
| 3143 | : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0), |
| 3144 | suppress_size_errors_(no_size_errors), multi_os_(multi_os), |
| 3145 | state_(NO_GROUP), group_size_(0), group_start_addr_(0), |
| 3146 | owner_(NULL), output_section_(NULL) |
| 3147 | { |
| 3148 | } |
| 3149 | |
| 3150 | // Return true iff input section can be handled by current stub |
| 3151 | // group. |
| 3152 | bool |
| 3153 | can_add_to_stub_group(Output_section* o, |
| 3154 | const Output_section::Input_section* i, |
| 3155 | bool has14); |
| 3156 | |
| 3157 | const Output_section::Input_section* |
| 3158 | owner() |
| 3159 | { return owner_; } |
| 3160 | |
| 3161 | Output_section* |
| 3162 | output_section() |
| 3163 | { return output_section_; } |
| 3164 | |
| 3165 | void |
| 3166 | set_output_and_owner(Output_section* o, |
| 3167 | const Output_section::Input_section* i) |
| 3168 | { |
| 3169 | this->output_section_ = o; |
| 3170 | this->owner_ = i; |
| 3171 | } |
| 3172 | |
| 3173 | private: |
| 3174 | typedef enum |
| 3175 | { |
| 3176 | // Initial state. |
| 3177 | NO_GROUP, |
| 3178 | // Adding group sections before the stubs. |
| 3179 | FINDING_STUB_SECTION, |
| 3180 | // Adding group sections after the stubs. |
| 3181 | HAS_STUB_SECTION |
| 3182 | } State; |
| 3183 | |
| 3184 | uint32_t stub_group_size_; |
| 3185 | bool stubs_always_after_branch_; |
| 3186 | bool suppress_size_errors_; |
| 3187 | // True if a stub group can serve multiple output sections. |
| 3188 | bool multi_os_; |
| 3189 | State state_; |
| 3190 | // Current max size of group. Starts at stub_group_size_ but is |
| 3191 | // reduced to stub_group_size_/1024 on seeing a section with |
| 3192 | // external conditional branches. |
| 3193 | uint32_t group_size_; |
| 3194 | uint64_t group_start_addr_; |
| 3195 | // owner_ and output_section_ specify the section to which stubs are |
| 3196 | // attached. The stubs are placed at the end of this section. |
| 3197 | const Output_section::Input_section* owner_; |
| 3198 | Output_section* output_section_; |
| 3199 | }; |
| 3200 | |
| 3201 | // Return true iff input section can be handled by current stub |
| 3202 | // group. Sections are presented to this function in order, |
| 3203 | // so the first section is the head of the group. |
| 3204 | |
| 3205 | bool |
| 3206 | Stub_control::can_add_to_stub_group(Output_section* o, |
| 3207 | const Output_section::Input_section* i, |
| 3208 | bool has14) |
| 3209 | { |
| 3210 | bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI; |
| 3211 | uint64_t this_size; |
| 3212 | uint64_t start_addr = o->address(); |
| 3213 | |
| 3214 | if (whole_sec) |
| 3215 | // .init and .fini sections are pasted together to form a single |
| 3216 | // function. We can't be adding stubs in the middle of the function. |
| 3217 | this_size = o->data_size(); |
| 3218 | else |
| 3219 | { |
| 3220 | start_addr += i->relobj()->output_section_offset(i->shndx()); |
| 3221 | this_size = i->data_size(); |
| 3222 | } |
| 3223 | |
| 3224 | uint64_t end_addr = start_addr + this_size; |
| 3225 | uint32_t group_size = this->stub_group_size_; |
| 3226 | if (has14) |
| 3227 | this->group_size_ = group_size = group_size >> 10; |
| 3228 | |
| 3229 | if (this_size > group_size && !this->suppress_size_errors_) |
| 3230 | gold_warning(_("%s:%s exceeds group size"), |
| 3231 | i->relobj()->name().c_str(), |
| 3232 | i->relobj()->section_name(i->shndx()).c_str()); |
| 3233 | |
| 3234 | gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx", |
| 3235 | has14 ? " 14bit" : "", |
| 3236 | i->relobj()->name().c_str(), |
| 3237 | i->relobj()->section_name(i->shndx()).c_str(), |
| 3238 | (long long) this_size, |
| 3239 | (this->state_ == NO_GROUP |
| 3240 | ? this_size |
| 3241 | : (long long) end_addr - this->group_start_addr_)); |
| 3242 | |
| 3243 | if (this->state_ == NO_GROUP) |
| 3244 | { |
| 3245 | // Only here on very first use of Stub_control |
| 3246 | this->owner_ = i; |
| 3247 | this->output_section_ = o; |
| 3248 | this->state_ = FINDING_STUB_SECTION; |
| 3249 | this->group_size_ = group_size; |
| 3250 | this->group_start_addr_ = start_addr; |
| 3251 | return true; |
| 3252 | } |
| 3253 | else if (!this->multi_os_ && this->output_section_ != o) |
| 3254 | ; |
| 3255 | else if (this->state_ == HAS_STUB_SECTION) |
| 3256 | { |
| 3257 | // Can we add this section, which is after the stubs, to the |
| 3258 | // group? |
| 3259 | if (end_addr - this->group_start_addr_ <= this->group_size_) |
| 3260 | return true; |
| 3261 | } |
| 3262 | else if (this->state_ == FINDING_STUB_SECTION) |
| 3263 | { |
| 3264 | if ((whole_sec && this->output_section_ == o) |
| 3265 | || end_addr - this->group_start_addr_ <= this->group_size_) |
| 3266 | { |
| 3267 | // Stubs are added at the end of "owner_". |
| 3268 | this->owner_ = i; |
| 3269 | this->output_section_ = o; |
| 3270 | return true; |
| 3271 | } |
| 3272 | // The group before the stubs has reached maximum size. |
| 3273 | // Now see about adding sections after the stubs to the |
| 3274 | // group. If the current section has a 14-bit branch and |
| 3275 | // the group before the stubs exceeds group_size_ (because |
| 3276 | // they didn't have 14-bit branches), don't add sections |
| 3277 | // after the stubs: The size of stubs for such a large |
| 3278 | // group may exceed the reach of a 14-bit branch. |
| 3279 | if (!this->stubs_always_after_branch_ |
| 3280 | && this_size <= this->group_size_ |
| 3281 | && start_addr - this->group_start_addr_ <= this->group_size_) |
| 3282 | { |
| 3283 | gold_debug(DEBUG_TARGET, "adding after stubs"); |
| 3284 | this->state_ = HAS_STUB_SECTION; |
| 3285 | this->group_start_addr_ = start_addr; |
| 3286 | return true; |
| 3287 | } |
| 3288 | } |
| 3289 | else |
| 3290 | gold_unreachable(); |
| 3291 | |
| 3292 | gold_debug(DEBUG_TARGET, |
| 3293 | !this->multi_os_ && this->output_section_ != o |
| 3294 | ? "nope, new output section\n" |
| 3295 | : "nope, didn't fit\n"); |
| 3296 | |
| 3297 | // The section fails to fit in the current group. Set up a few |
| 3298 | // things for the next group. owner_ and output_section_ will be |
| 3299 | // set later after we've retrieved those values for the current |
| 3300 | // group. |
| 3301 | this->state_ = FINDING_STUB_SECTION; |
| 3302 | this->group_size_ = group_size; |
| 3303 | this->group_start_addr_ = start_addr; |
| 3304 | return false; |
| 3305 | } |
| 3306 | |
| 3307 | // Look over all the input sections, deciding where to place stubs. |
| 3308 | |
| 3309 | template<int size, bool big_endian> |
| 3310 | void |
| 3311 | Target_powerpc<size, big_endian>::group_sections(Layout* layout, |
| 3312 | const Task*, |
| 3313 | bool no_size_errors) |
| 3314 | { |
| 3315 | Stub_control stub_control(this->stub_group_size_, no_size_errors, |
| 3316 | parameters->options().stub_group_multi()); |
| 3317 | |
| 3318 | // Group input sections and insert stub table |
| 3319 | Stub_table_owner* table_owner = NULL; |
| 3320 | std::vector<Stub_table_owner*> tables; |
| 3321 | Layout::Section_list section_list; |
| 3322 | layout->get_executable_sections(§ion_list); |
| 3323 | std::stable_sort(section_list.begin(), section_list.end(), Sort_sections()); |
| 3324 | for (Layout::Section_list::iterator o = section_list.begin(); |
| 3325 | o != section_list.end(); |
| 3326 | ++o) |
| 3327 | { |
| 3328 | typedef Output_section::Input_section_list Input_section_list; |
| 3329 | for (Input_section_list::const_iterator i |
| 3330 | = (*o)->input_sections().begin(); |
| 3331 | i != (*o)->input_sections().end(); |
| 3332 | ++i) |
| 3333 | { |
| 3334 | if (i->is_input_section() |
| 3335 | || i->is_relaxed_input_section()) |
| 3336 | { |
| 3337 | Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
| 3338 | <Powerpc_relobj<size, big_endian>*>(i->relobj()); |
| 3339 | bool has14 = ppcobj->has_14bit_branch(i->shndx()); |
| 3340 | if (!stub_control.can_add_to_stub_group(*o, &*i, has14)) |
| 3341 | { |
| 3342 | table_owner->output_section = stub_control.output_section(); |
| 3343 | table_owner->owner = stub_control.owner(); |
| 3344 | stub_control.set_output_and_owner(*o, &*i); |
| 3345 | table_owner = NULL; |
| 3346 | } |
| 3347 | if (table_owner == NULL) |
| 3348 | { |
| 3349 | table_owner = new Stub_table_owner; |
| 3350 | tables.push_back(table_owner); |
| 3351 | } |
| 3352 | ppcobj->set_stub_table(i->shndx(), tables.size() - 1); |
| 3353 | } |
| 3354 | } |
| 3355 | } |
| 3356 | if (table_owner != NULL) |
| 3357 | { |
| 3358 | table_owner->output_section = stub_control.output_section(); |
| 3359 | table_owner->owner = stub_control.owner();; |
| 3360 | } |
| 3361 | for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin(); |
| 3362 | t != tables.end(); |
| 3363 | ++t) |
| 3364 | { |
| 3365 | Stub_table<size, big_endian>* stub_table; |
| 3366 | |
| 3367 | if ((*t)->owner->is_input_section()) |
| 3368 | stub_table = new Stub_table<size, big_endian>(this, |
| 3369 | (*t)->output_section, |
| 3370 | (*t)->owner, |
| 3371 | this->stub_tables_.size()); |
| 3372 | else if ((*t)->owner->is_relaxed_input_section()) |
| 3373 | stub_table = static_cast<Stub_table<size, big_endian>*>( |
| 3374 | (*t)->owner->relaxed_input_section()); |
| 3375 | else |
| 3376 | gold_unreachable(); |
| 3377 | this->stub_tables_.push_back(stub_table); |
| 3378 | delete *t; |
| 3379 | } |
| 3380 | } |
| 3381 | |
| 3382 | template<int size> |
| 3383 | static unsigned long |
| 3384 | max_branch_delta (unsigned int r_type) |
| 3385 | { |
| 3386 | if (r_type == elfcpp::R_POWERPC_REL14 |
| 3387 | || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN |
| 3388 | || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN) |
| 3389 | return 1L << 15; |
| 3390 | if (r_type == elfcpp::R_POWERPC_REL24 |
| 3391 | || (size == 64 && r_type == elfcpp::R_PPC64_REL24_NOTOC) |
| 3392 | || r_type == elfcpp::R_PPC_PLTREL24 |
| 3393 | || r_type == elfcpp::R_PPC_LOCAL24PC) |
| 3394 | return 1L << 25; |
| 3395 | return 0; |
| 3396 | } |
| 3397 | |
| 3398 | // Return whether this branch is going via a plt call stub. |
| 3399 | |
| 3400 | template<int size, bool big_endian> |
| 3401 | bool |
| 3402 | Target_powerpc<size, big_endian>::Branch_info::mark_pltcall( |
| 3403 | Powerpc_relobj<size, big_endian>* ppc_object, |
| 3404 | unsigned int shndx, |
| 3405 | Address offset, |
| 3406 | Target_powerpc* target, |
| 3407 | Symbol_table* symtab) |
| 3408 | { |
| 3409 | if (this->object_ != ppc_object |
| 3410 | || this->shndx_ != shndx |
| 3411 | || this->offset_ != offset) |
| 3412 | return false; |
| 3413 | |
| 3414 | Symbol* sym = this->object_->global_symbol(this->r_sym_); |
| 3415 | if (sym != NULL && sym->is_forwarder()) |
| 3416 | sym = symtab->resolve_forwards(sym); |
| 3417 | if (target->replace_tls_get_addr(sym)) |
| 3418 | sym = target->tls_get_addr_opt(); |
| 3419 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); |
| 3420 | if (gsym != NULL |
| 3421 | ? (gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
| 3422 | && !target->is_elfv2_localentry0(gsym)) |
| 3423 | : (this->object_->local_has_plt_offset(this->r_sym_) |
| 3424 | && !target->is_elfv2_localentry0(this->object_, this->r_sym_))) |
| 3425 | { |
| 3426 | this->tocsave_ = 1; |
| 3427 | return true; |
| 3428 | } |
| 3429 | return false; |
| 3430 | } |
| 3431 | |
| 3432 | // If this branch needs a plt call stub, or a long branch stub, make one. |
| 3433 | |
| 3434 | template<int size, bool big_endian> |
| 3435 | bool |
| 3436 | Target_powerpc<size, big_endian>::Branch_info::make_stub( |
| 3437 | Stub_table<size, big_endian>* stub_table, |
| 3438 | Stub_table<size, big_endian>* ifunc_stub_table, |
| 3439 | Symbol_table* symtab) const |
| 3440 | { |
| 3441 | Symbol* sym = this->object_->global_symbol(this->r_sym_); |
| 3442 | Target_powerpc<size, big_endian>* target = |
| 3443 | static_cast<Target_powerpc<size, big_endian>*>( |
| 3444 | parameters->sized_target<size, big_endian>()); |
| 3445 | if (sym != NULL && sym->is_forwarder()) |
| 3446 | sym = symtab->resolve_forwards(sym); |
| 3447 | if (target->replace_tls_get_addr(sym)) |
| 3448 | sym = target->tls_get_addr_opt(); |
| 3449 | const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym); |
| 3450 | bool ok = true; |
| 3451 | |
| 3452 | if (gsym != NULL |
| 3453 | ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target)) |
| 3454 | : this->object_->local_has_plt_offset(this->r_sym_)) |
| 3455 | { |
| 3456 | if (size == 64 |
| 3457 | && gsym != NULL |
| 3458 | && target->abiversion() >= 2 |
| 3459 | && !parameters->options().output_is_position_independent() |
| 3460 | && !is_branch_reloc<size>(this->r_type_)) |
| 3461 | target->glink_section()->add_global_entry(gsym); |
| 3462 | else |
| 3463 | { |
| 3464 | if (stub_table == NULL |
| 3465 | && !(size == 32 |
| 3466 | && gsym != NULL |
| 3467 | && !parameters->options().output_is_position_independent() |
| 3468 | && !is_branch_reloc<size>(this->r_type_))) |
| 3469 | stub_table = this->object_->stub_table(this->shndx_); |
| 3470 | if (stub_table == NULL) |
| 3471 | { |
| 3472 | // This is a ref from a data section to an ifunc symbol, |
| 3473 | // or a non-branch reloc for which we always want to use |
| 3474 | // one set of stubs for resolving function addresses. |
| 3475 | stub_table = ifunc_stub_table; |
| 3476 | } |
| 3477 | gold_assert(stub_table != NULL); |
| 3478 | Address from = this->object_->get_output_section_offset(this->shndx_); |
| 3479 | if (from != invalid_address) |
| 3480 | from += (this->object_->output_section(this->shndx_)->address() |
| 3481 | + this->offset_); |
| 3482 | if (gsym != NULL) |
| 3483 | ok = stub_table->add_plt_call_entry(from, |
| 3484 | this->object_, gsym, |
| 3485 | this->r_type_, this->addend_, |
| 3486 | this->tocsave_); |
| 3487 | else |
| 3488 | ok = stub_table->add_plt_call_entry(from, |
| 3489 | this->object_, this->r_sym_, |
| 3490 | this->r_type_, this->addend_, |
| 3491 | this->tocsave_); |
| 3492 | } |
| 3493 | } |
| 3494 | else |
| 3495 | { |
| 3496 | Address max_branch_offset = max_branch_delta<size>(this->r_type_); |
| 3497 | if (max_branch_offset == 0) |
| 3498 | return true; |
| 3499 | Address from = this->object_->get_output_section_offset(this->shndx_); |
| 3500 | gold_assert(from != invalid_address); |
| 3501 | from += (this->object_->output_section(this->shndx_)->address() |
| 3502 | + this->offset_); |
| 3503 | Address to; |
| 3504 | if (gsym != NULL) |
| 3505 | { |
| 3506 | switch (gsym->source()) |
| 3507 | { |
| 3508 | case Symbol::FROM_OBJECT: |
| 3509 | { |
| 3510 | Object* symobj = gsym->object(); |
| 3511 | if (symobj->is_dynamic() |
| 3512 | || symobj->pluginobj() != NULL) |
| 3513 | return true; |
| 3514 | bool is_ordinary; |
| 3515 | unsigned int shndx = gsym->shndx(&is_ordinary); |
| 3516 | if (shndx == elfcpp::SHN_UNDEF) |
| 3517 | return true; |
| 3518 | } |
| 3519 | break; |
| 3520 | |
| 3521 | case Symbol::IS_UNDEFINED: |
| 3522 | return true; |
| 3523 | |
| 3524 | default: |
| 3525 | break; |
| 3526 | } |
| 3527 | Symbol_table::Compute_final_value_status status; |
| 3528 | to = symtab->compute_final_value<size>(gsym, &status); |
| 3529 | if (status != Symbol_table::CFVS_OK) |
| 3530 | return true; |
| 3531 | if (size == 64) |
| 3532 | to += this->object_->ppc64_local_entry_offset(gsym); |
| 3533 | } |
| 3534 | else |
| 3535 | { |
| 3536 | const Symbol_value<size>* psymval |
| 3537 | = this->object_->local_symbol(this->r_sym_); |
| 3538 | Symbol_value<size> symval; |
| 3539 | if (psymval->is_section_symbol()) |
| 3540 | symval.set_is_section_symbol(); |
| 3541 | typedef Sized_relobj_file<size, big_endian> ObjType; |
| 3542 | typename ObjType::Compute_final_local_value_status status |
| 3543 | = this->object_->compute_final_local_value(this->r_sym_, psymval, |
| 3544 | &symval, symtab); |
| 3545 | if (status != ObjType::CFLV_OK |
| 3546 | || !symval.has_output_value()) |
| 3547 | return true; |
| 3548 | to = symval.value(this->object_, 0); |
| 3549 | if (size == 64) |
| 3550 | to += this->object_->ppc64_local_entry_offset(this->r_sym_); |
| 3551 | } |
| 3552 | if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24)) |
| 3553 | to += this->addend_; |
| 3554 | if (stub_table == NULL) |
| 3555 | stub_table = this->object_->stub_table(this->shndx_); |
| 3556 | if (size == 64 && target->abiversion() < 2) |
| 3557 | { |
| 3558 | unsigned int dest_shndx; |
| 3559 | if (!target->symval_for_branch(symtab, gsym, this->object_, |
| 3560 | &to, &dest_shndx)) |
| 3561 | return true; |
| 3562 | } |
| 3563 | Address delta = to - from; |
| 3564 | if (delta + max_branch_offset >= 2 * max_branch_offset |
| 3565 | || (size == 64 |
| 3566 | && this->r_type_ == elfcpp::R_PPC64_REL24_NOTOC |
| 3567 | && (gsym != NULL |
| 3568 | ? this->object_->ppc64_needs_toc(gsym) |
| 3569 | : this->object_->ppc64_needs_toc(this->r_sym_)))) |
| 3570 | { |
| 3571 | if (stub_table == NULL) |
| 3572 | { |
| 3573 | gold_warning(_("%s:%s: branch in non-executable section," |
| 3574 | " no long branch stub for you"), |
| 3575 | this->object_->name().c_str(), |
| 3576 | this->object_->section_name(this->shndx_).c_str()); |
| 3577 | return true; |
| 3578 | } |
| 3579 | bool save_res = (size == 64 |
| 3580 | && gsym != NULL |
| 3581 | && gsym->source() == Symbol::IN_OUTPUT_DATA |
| 3582 | && gsym->output_data() == target->savres_section()); |
| 3583 | ok = stub_table->add_long_branch_entry(this->object_, |
| 3584 | this->r_type_, |
| 3585 | from, to, save_res); |
| 3586 | } |
| 3587 | } |
| 3588 | if (!ok) |
| 3589 | gold_debug(DEBUG_TARGET, |
| 3590 | "branch at %s:%s+%#lx\n" |
| 3591 | "can't reach stub attached to %s:%s", |
| 3592 | this->object_->name().c_str(), |
| 3593 | this->object_->section_name(this->shndx_).c_str(), |
| 3594 | (unsigned long) this->offset_, |
| 3595 | stub_table->relobj()->name().c_str(), |
| 3596 | stub_table->relobj()->section_name(stub_table->shndx()).c_str()); |
| 3597 | |
| 3598 | return ok; |
| 3599 | } |
| 3600 | |
| 3601 | // Relaxation hook. This is where we do stub generation. |
| 3602 | |
| 3603 | template<int size, bool big_endian> |
| 3604 | bool |
| 3605 | Target_powerpc<size, big_endian>::do_relax(int pass, |
| 3606 | const Input_objects*, |
| 3607 | Symbol_table* symtab, |
| 3608 | Layout* layout, |
| 3609 | const Task* task) |
| 3610 | { |
| 3611 | unsigned int prev_brlt_size = 0; |
| 3612 | if (pass == 1) |
| 3613 | { |
| 3614 | bool thread_safe |
| 3615 | = this->abiversion() < 2 && parameters->options().plt_thread_safe(); |
| 3616 | if (size == 64 |
| 3617 | && this->abiversion() < 2 |
| 3618 | && !thread_safe |
| 3619 | && !parameters->options().user_set_plt_thread_safe()) |
| 3620 | { |
| 3621 | static const char* const thread_starter[] = |
| 3622 | { |
| 3623 | "pthread_create", |
| 3624 | /* libstdc++ */ |
| 3625 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", |
| 3626 | /* librt */ |
| 3627 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", |
| 3628 | "mq_notify", "create_timer", |
| 3629 | /* libanl */ |
| 3630 | "getaddrinfo_a", |
| 3631 | /* libgomp */ |
| 3632 | "GOMP_parallel", |
| 3633 | "GOMP_parallel_start", |
| 3634 | "GOMP_parallel_loop_static", |
| 3635 | "GOMP_parallel_loop_static_start", |
| 3636 | "GOMP_parallel_loop_dynamic", |
| 3637 | "GOMP_parallel_loop_dynamic_start", |
| 3638 | "GOMP_parallel_loop_guided", |
| 3639 | "GOMP_parallel_loop_guided_start", |
| 3640 | "GOMP_parallel_loop_runtime", |
| 3641 | "GOMP_parallel_loop_runtime_start", |
| 3642 | "GOMP_parallel_sections", |
| 3643 | "GOMP_parallel_sections_start", |
| 3644 | /* libgo */ |
| 3645 | "__go_go", |
| 3646 | }; |
| 3647 | |
| 3648 | if (parameters->options().shared()) |
| 3649 | thread_safe = true; |
| 3650 | else |
| 3651 | { |
| 3652 | for (unsigned int i = 0; |
| 3653 | i < sizeof(thread_starter) / sizeof(thread_starter[0]); |
| 3654 | i++) |
| 3655 | { |
| 3656 | Symbol* sym = symtab->lookup(thread_starter[i], NULL); |
| 3657 | thread_safe = (sym != NULL |
| 3658 | && sym->in_reg() |
| 3659 | && sym->in_real_elf()); |
| 3660 | if (thread_safe) |
| 3661 | break; |
| 3662 | } |
| 3663 | } |
| 3664 | } |
| 3665 | this->plt_thread_safe_ = thread_safe; |
| 3666 | } |
| 3667 | |
| 3668 | if (pass == 1) |
| 3669 | { |
| 3670 | this->stub_group_size_ = parameters->options().stub_group_size(); |
| 3671 | bool no_size_errors = true; |
| 3672 | if (this->stub_group_size_ == 1) |
| 3673 | this->stub_group_size_ = 0x1c00000; |
| 3674 | else if (this->stub_group_size_ == -1) |
| 3675 | this->stub_group_size_ = -0x1e00000; |
| 3676 | else |
| 3677 | no_size_errors = false; |
| 3678 | this->group_sections(layout, task, no_size_errors); |
| 3679 | } |
| 3680 | else if (this->relax_failed_ && this->relax_fail_count_ < 3) |
| 3681 | { |
| 3682 | this->branch_lookup_table_.clear(); |
| 3683 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3684 | p != this->stub_tables_.end(); |
| 3685 | ++p) |
| 3686 | { |
| 3687 | (*p)->clear_stubs(true); |
| 3688 | } |
| 3689 | this->stub_tables_.clear(); |
| 3690 | this->stub_group_size_ = this->stub_group_size_ / 4 * 3; |
| 3691 | gold_info(_("%s: stub group size is too large; retrying with %#x"), |
| 3692 | program_name, this->stub_group_size_); |
| 3693 | this->group_sections(layout, task, true); |
| 3694 | } |
| 3695 | |
| 3696 | // We need address of stub tables valid for make_stub. |
| 3697 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3698 | p != this->stub_tables_.end(); |
| 3699 | ++p) |
| 3700 | { |
| 3701 | const Powerpc_relobj<size, big_endian>* object |
| 3702 | = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj()); |
| 3703 | Address off = object->get_output_section_offset((*p)->shndx()); |
| 3704 | gold_assert(off != invalid_address); |
| 3705 | Output_section* os = (*p)->output_section(); |
| 3706 | (*p)->set_address_and_size(os, off); |
| 3707 | } |
| 3708 | |
| 3709 | if (pass != 1) |
| 3710 | { |
| 3711 | // Clear plt call stubs, long branch stubs and branch lookup table. |
| 3712 | prev_brlt_size = this->branch_lookup_table_.size(); |
| 3713 | this->branch_lookup_table_.clear(); |
| 3714 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3715 | p != this->stub_tables_.end(); |
| 3716 | ++p) |
| 3717 | { |
| 3718 | (*p)->clear_stubs(false); |
| 3719 | } |
| 3720 | } |
| 3721 | |
| 3722 | // Build all the stubs. |
| 3723 | this->relax_failed_ = false; |
| 3724 | Stub_table<size, big_endian>* ifunc_stub_table |
| 3725 | = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0]; |
| 3726 | Stub_table<size, big_endian>* one_stub_table |
| 3727 | = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table; |
| 3728 | for (typename Branches::const_iterator b = this->branch_info_.begin(); |
| 3729 | b != this->branch_info_.end(); |
| 3730 | b++) |
| 3731 | { |
| 3732 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
| 3733 | && !this->relax_failed_) |
| 3734 | { |
| 3735 | this->relax_failed_ = true; |
| 3736 | this->relax_fail_count_++; |
| 3737 | if (this->relax_fail_count_ < 3) |
| 3738 | return true; |
| 3739 | } |
| 3740 | } |
| 3741 | bool do_resize = false; |
| 3742 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3743 | p != this->stub_tables_.end(); |
| 3744 | ++p) |
| 3745 | if ((*p)->need_resize()) |
| 3746 | { |
| 3747 | do_resize = true; |
| 3748 | break; |
| 3749 | } |
| 3750 | if (do_resize) |
| 3751 | { |
| 3752 | this->branch_lookup_table_.clear(); |
| 3753 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3754 | p != this->stub_tables_.end(); |
| 3755 | ++p) |
| 3756 | (*p)->set_resizing(true); |
| 3757 | for (typename Branches::const_iterator b = this->branch_info_.begin(); |
| 3758 | b != this->branch_info_.end(); |
| 3759 | b++) |
| 3760 | { |
| 3761 | if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab) |
| 3762 | && !this->relax_failed_) |
| 3763 | { |
| 3764 | this->relax_failed_ = true; |
| 3765 | this->relax_fail_count_++; |
| 3766 | if (this->relax_fail_count_ < 3) |
| 3767 | return true; |
| 3768 | } |
| 3769 | } |
| 3770 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3771 | p != this->stub_tables_.end(); |
| 3772 | ++p) |
| 3773 | (*p)->set_resizing(false); |
| 3774 | } |
| 3775 | |
| 3776 | // Did anything change size? |
| 3777 | unsigned int num_huge_branches = this->branch_lookup_table_.size(); |
| 3778 | bool again = num_huge_branches != prev_brlt_size; |
| 3779 | if (size == 64 && num_huge_branches != 0) |
| 3780 | this->make_brlt_section(layout); |
| 3781 | if (size == 64 && again) |
| 3782 | this->brlt_section_->set_current_size(num_huge_branches); |
| 3783 | |
| 3784 | for (typename Stub_tables::reverse_iterator p = this->stub_tables_.rbegin(); |
| 3785 | p != this->stub_tables_.rend(); |
| 3786 | ++p) |
| 3787 | (*p)->remove_eh_frame(layout); |
| 3788 | |
| 3789 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3790 | p != this->stub_tables_.end(); |
| 3791 | ++p) |
| 3792 | (*p)->add_eh_frame(layout); |
| 3793 | |
| 3794 | typedef Unordered_set<Output_section*> Output_sections; |
| 3795 | Output_sections os_need_update; |
| 3796 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3797 | p != this->stub_tables_.end(); |
| 3798 | ++p) |
| 3799 | { |
| 3800 | if ((*p)->size_update()) |
| 3801 | { |
| 3802 | again = true; |
| 3803 | os_need_update.insert((*p)->output_section()); |
| 3804 | } |
| 3805 | } |
| 3806 | |
| 3807 | // Set output section offsets for all input sections in an output |
| 3808 | // section that just changed size. Anything past the stubs will |
| 3809 | // need updating. |
| 3810 | for (typename Output_sections::iterator p = os_need_update.begin(); |
| 3811 | p != os_need_update.end(); |
| 3812 | p++) |
| 3813 | { |
| 3814 | Output_section* os = *p; |
| 3815 | Address off = 0; |
| 3816 | typedef Output_section::Input_section_list Input_section_list; |
| 3817 | for (Input_section_list::const_iterator i = os->input_sections().begin(); |
| 3818 | i != os->input_sections().end(); |
| 3819 | ++i) |
| 3820 | { |
| 3821 | off = align_address(off, i->addralign()); |
| 3822 | if (i->is_input_section() || i->is_relaxed_input_section()) |
| 3823 | i->relobj()->set_section_offset(i->shndx(), off); |
| 3824 | if (i->is_relaxed_input_section()) |
| 3825 | { |
| 3826 | Stub_table<size, big_endian>* stub_table |
| 3827 | = static_cast<Stub_table<size, big_endian>*>( |
| 3828 | i->relaxed_input_section()); |
| 3829 | Address stub_table_size = stub_table->set_address_and_size(os, off); |
| 3830 | off += stub_table_size; |
| 3831 | // After a few iterations, set current stub table size |
| 3832 | // as min size threshold, so later stub tables can only |
| 3833 | // grow in size. |
| 3834 | if (pass >= 4) |
| 3835 | stub_table->set_min_size_threshold(stub_table_size); |
| 3836 | } |
| 3837 | else |
| 3838 | off += i->data_size(); |
| 3839 | } |
| 3840 | // If .branch_lt is part of this output section, then we have |
| 3841 | // just done the offset adjustment. |
| 3842 | os->clear_section_offsets_need_adjustment(); |
| 3843 | } |
| 3844 | |
| 3845 | if (size == 64 |
| 3846 | && !again |
| 3847 | && num_huge_branches != 0 |
| 3848 | && parameters->options().output_is_position_independent()) |
| 3849 | { |
| 3850 | // Fill in the BRLT relocs. |
| 3851 | this->brlt_section_->reset_brlt_sizes(); |
| 3852 | for (typename Branch_lookup_table::const_iterator p |
| 3853 | = this->branch_lookup_table_.begin(); |
| 3854 | p != this->branch_lookup_table_.end(); |
| 3855 | ++p) |
| 3856 | { |
| 3857 | this->brlt_section_->add_reloc(p->first, p->second); |
| 3858 | } |
| 3859 | this->brlt_section_->finalize_brlt_sizes(); |
| 3860 | } |
| 3861 | |
| 3862 | if (!again |
| 3863 | && (parameters->options().user_set_emit_stub_syms() |
| 3864 | ? parameters->options().emit_stub_syms() |
| 3865 | : (size == 64 |
| 3866 | || parameters->options().output_is_position_independent() |
| 3867 | || parameters->options().emit_relocs()))) |
| 3868 | { |
| 3869 | for (typename Stub_tables::iterator p = this->stub_tables_.begin(); |
| 3870 | p != this->stub_tables_.end(); |
| 3871 | ++p) |
| 3872 | (*p)->define_stub_syms(symtab); |
| 3873 | |
| 3874 | if (this->glink_ != NULL) |
| 3875 | { |
| 3876 | int stub_size = this->glink_->pltresolve_size(); |
| 3877 | Address value = -stub_size; |
| 3878 | if (size == 64) |
| 3879 | { |
| 3880 | value = 8; |
| 3881 | stub_size -= 8; |
| 3882 | } |
| 3883 | this->define_local(symtab, "__glink_PLTresolve", |
| 3884 | this->glink_, value, stub_size); |
| 3885 | |
| 3886 | if (size != 64) |
| 3887 | this->define_local(symtab, "__glink", this->glink_, 0, 0); |
| 3888 | } |
| 3889 | } |
| 3890 | |
| 3891 | return again; |
| 3892 | } |
| 3893 | |
| 3894 | template<int size, bool big_endian> |
| 3895 | void |
| 3896 | Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt, |
| 3897 | unsigned char* oview, |
| 3898 | uint64_t* paddress, |
| 3899 | off_t* plen) const |
| 3900 | { |
| 3901 | uint64_t address = plt->address(); |
| 3902 | off_t len = plt->data_size(); |
| 3903 | |
| 3904 | if (plt == this->glink_) |
| 3905 | { |
| 3906 | // See Output_data_glink::do_write() for glink contents. |
| 3907 | if (len == 0) |
| 3908 | { |
| 3909 | gold_assert(parameters->doing_static_link()); |
| 3910 | // Static linking may need stubs, to support ifunc and long |
| 3911 | // branches. We need to create an output section for |
| 3912 | // .eh_frame early in the link process, to have a place to |
| 3913 | // attach stub .eh_frame info. We also need to have |
| 3914 | // registered a CIE that matches the stub CIE. Both of |
| 3915 | // these requirements are satisfied by creating an FDE and |
| 3916 | // CIE for .glink, even though static linking will leave |
| 3917 | // .glink zero length. |
| 3918 | // ??? Hopefully generating an FDE with a zero address range |
| 3919 | // won't confuse anything that consumes .eh_frame info. |
| 3920 | } |
| 3921 | else if (size == 64) |
| 3922 | { |
| 3923 | // There is one word before __glink_PLTresolve |
| 3924 | address += 8; |
| 3925 | len -= 8; |
| 3926 | } |
| 3927 | else if (parameters->options().output_is_position_independent()) |
| 3928 | { |
| 3929 | // There are two FDEs for a position independent glink. |
| 3930 | // The first covers the branch table, the second |
| 3931 | // __glink_PLTresolve at the end of glink. |
| 3932 | off_t resolve_size = this->glink_->pltresolve_size(); |
| 3933 | if (oview[9] == elfcpp::DW_CFA_nop) |
| 3934 | len -= resolve_size; |
| 3935 | else |
| 3936 | { |
| 3937 | address += len - resolve_size; |
| 3938 | len = resolve_size; |
| 3939 | } |
| 3940 | } |
| 3941 | } |
| 3942 | else |
| 3943 | { |
| 3944 | // Must be a stub table. |
| 3945 | const Stub_table<size, big_endian>* stub_table |
| 3946 | = static_cast<const Stub_table<size, big_endian>*>(plt); |
| 3947 | uint64_t stub_address = stub_table->stub_address(); |
| 3948 | len -= stub_address - address; |
| 3949 | address = stub_address; |
| 3950 | } |
| 3951 | |
| 3952 | *paddress = address; |
| 3953 | *plen = len; |
| 3954 | } |
| 3955 | |
| 3956 | // A class to handle the PLT data. |
| 3957 | |
| 3958 | template<int size, bool big_endian> |
| 3959 | class Output_data_plt_powerpc : public Output_section_data_build |
| 3960 | { |
| 3961 | public: |
| 3962 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, |
| 3963 | size, big_endian> Reloc_section; |
| 3964 | |
| 3965 | Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ, |
| 3966 | Reloc_section* plt_rel, |
| 3967 | const char* name) |
| 3968 | : Output_section_data_build(size == 32 ? 4 : 8), |
| 3969 | rel_(plt_rel), |
| 3970 | targ_(targ), |
| 3971 | name_(name) |
| 3972 | { } |
| 3973 | |
| 3974 | // Add an entry to the PLT. |
| 3975 | void |
| 3976 | add_entry(Symbol*); |
| 3977 | |
| 3978 | void |
| 3979 | add_ifunc_entry(Symbol*); |
| 3980 | |
| 3981 | void |
| 3982 | add_local_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
| 3983 | |
| 3984 | void |
| 3985 | add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int); |
| 3986 | |
| 3987 | // Return the .rela.plt section data. |
| 3988 | Reloc_section* |
| 3989 | rel_plt() const |
| 3990 | { |
| 3991 | return this->rel_; |
| 3992 | } |
| 3993 | |
| 3994 | // Return the number of PLT entries. |
| 3995 | unsigned int |
| 3996 | entry_count() const |
| 3997 | { |
| 3998 | if (this->current_data_size() == 0) |
| 3999 | return 0; |
| 4000 | return ((this->current_data_size() - this->first_plt_entry_offset()) |
| 4001 | / this->plt_entry_size()); |
| 4002 | } |
| 4003 | |
| 4004 | protected: |
| 4005 | void |
| 4006 | do_adjust_output_section(Output_section* os) |
| 4007 | { |
| 4008 | os->set_entsize(0); |
| 4009 | } |
| 4010 | |
| 4011 | // Write to a map file. |
| 4012 | void |
| 4013 | do_print_to_mapfile(Mapfile* mapfile) const |
| 4014 | { mapfile->print_output_data(this, this->name_); } |
| 4015 | |
| 4016 | private: |
| 4017 | // Return the offset of the first non-reserved PLT entry. |
| 4018 | unsigned int |
| 4019 | first_plt_entry_offset() const |
| 4020 | { |
| 4021 | // IPLT and LPLT have no reserved entry. |
| 4022 | if (this->name_[3] == 'I' || this->name_[3] == 'L') |
| 4023 | return 0; |
| 4024 | return this->targ_->first_plt_entry_offset(); |
| 4025 | } |
| 4026 | |
| 4027 | // Return the size of each PLT entry. |
| 4028 | unsigned int |
| 4029 | plt_entry_size() const |
| 4030 | { |
| 4031 | return this->targ_->plt_entry_size(); |
| 4032 | } |
| 4033 | |
| 4034 | // Write out the PLT data. |
| 4035 | void |
| 4036 | do_write(Output_file*); |
| 4037 | |
| 4038 | // The reloc section. |
| 4039 | Reloc_section* rel_; |
| 4040 | // Allows access to .glink for do_write. |
| 4041 | Target_powerpc<size, big_endian>* targ_; |
| 4042 | // What to report in map file. |
| 4043 | const char *name_; |
| 4044 | }; |
| 4045 | |
| 4046 | // Add an entry to the PLT. |
| 4047 | |
| 4048 | template<int size, bool big_endian> |
| 4049 | void |
| 4050 | Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym) |
| 4051 | { |
| 4052 | if (!gsym->has_plt_offset()) |
| 4053 | { |
| 4054 | section_size_type off = this->current_data_size(); |
| 4055 | if (off == 0) |
| 4056 | off += this->first_plt_entry_offset(); |
| 4057 | gsym->set_plt_offset(off); |
| 4058 | gsym->set_needs_dynsym_entry(); |
| 4059 | unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT; |
| 4060 | this->rel_->add_global(gsym, dynrel, this, off, 0); |
| 4061 | off += this->plt_entry_size(); |
| 4062 | this->set_current_data_size(off); |
| 4063 | } |
| 4064 | } |
| 4065 | |
| 4066 | // Add an entry for a global ifunc symbol that resolves locally, to the IPLT. |
| 4067 | |
| 4068 | template<int size, bool big_endian> |
| 4069 | void |
| 4070 | Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym) |
| 4071 | { |
| 4072 | if (!gsym->has_plt_offset()) |
| 4073 | { |
| 4074 | section_size_type off = this->current_data_size(); |
| 4075 | gsym->set_plt_offset(off); |
| 4076 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
| 4077 | if (size == 64 && this->targ_->abiversion() < 2) |
| 4078 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
| 4079 | this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0); |
| 4080 | off += this->plt_entry_size(); |
| 4081 | this->set_current_data_size(off); |
| 4082 | } |
| 4083 | } |
| 4084 | |
| 4085 | // Add an entry for a local symbol to the PLT. |
| 4086 | |
| 4087 | template<int size, bool big_endian> |
| 4088 | void |
| 4089 | Output_data_plt_powerpc<size, big_endian>::add_local_entry( |
| 4090 | Sized_relobj_file<size, big_endian>* relobj, |
| 4091 | unsigned int local_sym_index) |
| 4092 | { |
| 4093 | if (!relobj->local_has_plt_offset(local_sym_index)) |
| 4094 | { |
| 4095 | section_size_type off = this->current_data_size(); |
| 4096 | relobj->set_local_plt_offset(local_sym_index, off); |
| 4097 | if (this->rel_) |
| 4098 | { |
| 4099 | unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE; |
| 4100 | if (size == 64 && this->targ_->abiversion() < 2) |
| 4101 | dynrel = elfcpp::R_POWERPC_JMP_SLOT; |
| 4102 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, |
| 4103 | dynrel, this, off, 0); |
| 4104 | } |
| 4105 | off += this->plt_entry_size(); |
| 4106 | this->set_current_data_size(off); |
| 4107 | } |
| 4108 | } |
| 4109 | |
| 4110 | // Add an entry for a local ifunc symbol to the IPLT. |
| 4111 | |
| 4112 | template<int size, bool big_endian> |
| 4113 | void |
| 4114 | Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry( |
| 4115 | Sized_relobj_file<size, big_endian>* relobj, |
| 4116 | unsigned int local_sym_index) |
| 4117 | { |
| 4118 | if (!relobj->local_has_plt_offset(local_sym_index)) |
| 4119 | { |
| 4120 | section_size_type off = this->current_data_size(); |
| 4121 | relobj->set_local_plt_offset(local_sym_index, off); |
| 4122 | unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE; |
| 4123 | if (size == 64 && this->targ_->abiversion() < 2) |
| 4124 | dynrel = elfcpp::R_PPC64_JMP_IREL; |
| 4125 | this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel, |
| 4126 | this, off, 0); |
| 4127 | off += this->plt_entry_size(); |
| 4128 | this->set_current_data_size(off); |
| 4129 | } |
| 4130 | } |
| 4131 | |
| 4132 | static const uint32_t add_0_11_11 = 0x7c0b5a14; |
| 4133 | static const uint32_t add_2_2_11 = 0x7c425a14; |
| 4134 | static const uint32_t add_2_2_12 = 0x7c426214; |
| 4135 | static const uint32_t add_3_3_2 = 0x7c631214; |
| 4136 | static const uint32_t add_3_3_13 = 0x7c636a14; |
| 4137 | static const uint32_t add_3_12_2 = 0x7c6c1214; |
| 4138 | static const uint32_t add_3_12_13 = 0x7c6c6a14; |
| 4139 | static const uint32_t add_11_0_11 = 0x7d605a14; |
| 4140 | static const uint32_t add_11_2_11 = 0x7d625a14; |
| 4141 | static const uint32_t add_11_11_2 = 0x7d6b1214; |
| 4142 | static const uint32_t add_12_11_12 = 0x7d8b6214; |
| 4143 | static const uint32_t addi_0_12 = 0x380c0000; |
| 4144 | static const uint32_t addi_2_2 = 0x38420000; |
| 4145 | static const uint32_t addi_3_3 = 0x38630000; |
| 4146 | static const uint32_t addi_11_11 = 0x396b0000; |
| 4147 | static const uint32_t addi_12_1 = 0x39810000; |
| 4148 | static const uint32_t addi_12_11 = 0x398b0000; |
| 4149 | static const uint32_t addi_12_12 = 0x398c0000; |
| 4150 | static const uint32_t addis_0_2 = 0x3c020000; |
| 4151 | static const uint32_t addis_0_13 = 0x3c0d0000; |
| 4152 | static const uint32_t addis_2_12 = 0x3c4c0000; |
| 4153 | static const uint32_t addis_11_2 = 0x3d620000; |
| 4154 | static const uint32_t addis_11_11 = 0x3d6b0000; |
| 4155 | static const uint32_t addis_11_30 = 0x3d7e0000; |
| 4156 | static const uint32_t addis_12_1 = 0x3d810000; |
| 4157 | static const uint32_t addis_12_2 = 0x3d820000; |
| 4158 | static const uint32_t addis_12_11 = 0x3d8b0000; |
| 4159 | static const uint32_t addis_12_12 = 0x3d8c0000; |
| 4160 | static const uint32_t b = 0x48000000; |
| 4161 | static const uint32_t bcl_20_31 = 0x429f0005; |
| 4162 | static const uint32_t bctr = 0x4e800420; |
| 4163 | static const uint32_t bctrl = 0x4e800421; |
| 4164 | static const uint32_t beqlr = 0x4d820020; |
| 4165 | static const uint32_t blr = 0x4e800020; |
| 4166 | static const uint32_t bnectr_p4 = 0x4ce20420; |
| 4167 | static const uint32_t cmpld_7_12_0 = 0x7fac0040; |
| 4168 | static const uint32_t cmpldi_2_0 = 0x28220000; |
| 4169 | static const uint32_t cmpdi_11_0 = 0x2c2b0000; |
| 4170 | static const uint32_t cmpwi_11_0 = 0x2c0b0000; |
| 4171 | static const uint32_t cror_15_15_15 = 0x4def7b82; |
| 4172 | static const uint32_t cror_31_31_31 = 0x4ffffb82; |
| 4173 | static const uint32_t ld_0_1 = 0xe8010000; |
| 4174 | static const uint32_t ld_0_12 = 0xe80c0000; |
| 4175 | static const uint32_t ld_2_1 = 0xe8410000; |
| 4176 | static const uint32_t ld_2_2 = 0xe8420000; |
| 4177 | static const uint32_t ld_2_11 = 0xe84b0000; |
| 4178 | static const uint32_t ld_2_12 = 0xe84c0000; |
| 4179 | static const uint32_t ld_11_1 = 0xe9610000; |
| 4180 | static const uint32_t ld_11_2 = 0xe9620000; |
| 4181 | static const uint32_t ld_11_3 = 0xe9630000; |
| 4182 | static const uint32_t ld_11_11 = 0xe96b0000; |
| 4183 | static const uint32_t ld_12_2 = 0xe9820000; |
| 4184 | static const uint32_t ld_12_3 = 0xe9830000; |
| 4185 | static const uint32_t ld_12_11 = 0xe98b0000; |
| 4186 | static const uint32_t ld_12_12 = 0xe98c0000; |
| 4187 | static const uint32_t ldx_12_11_12 = 0x7d8b602a; |
| 4188 | static const uint32_t lfd_0_1 = 0xc8010000; |
| 4189 | static const uint32_t li_0_0 = 0x38000000; |
| 4190 | static const uint32_t li_11_0 = 0x39600000; |
| 4191 | static const uint32_t li_12_0 = 0x39800000; |
| 4192 | static const uint32_t lis_0 = 0x3c000000; |
| 4193 | static const uint32_t lis_2 = 0x3c400000; |
| 4194 | static const uint32_t lis_11 = 0x3d600000; |
| 4195 | static const uint32_t lis_12 = 0x3d800000; |
| 4196 | static const uint32_t lvx_0_12_0 = 0x7c0c00ce; |
| 4197 | static const uint32_t lwz_0_12 = 0x800c0000; |
| 4198 | static const uint32_t lwz_11_3 = 0x81630000; |
| 4199 | static const uint32_t lwz_11_11 = 0x816b0000; |
| 4200 | static const uint32_t lwz_11_30 = 0x817e0000; |
| 4201 | static const uint32_t lwz_12_3 = 0x81830000; |
| 4202 | static const uint32_t lwz_12_12 = 0x818c0000; |
| 4203 | static const uint32_t lwzu_0_12 = 0x840c0000; |
| 4204 | static const uint32_t mflr_0 = 0x7c0802a6; |
| 4205 | static const uint32_t mflr_11 = 0x7d6802a6; |
| 4206 | static const uint32_t mflr_12 = 0x7d8802a6; |
| 4207 | static const uint32_t mr_0_3 = 0x7c601b78; |
| 4208 | static const uint32_t mr_3_0 = 0x7c030378; |
| 4209 | static const uint32_t mtctr_0 = 0x7c0903a6; |
| 4210 | static const uint32_t mtctr_11 = 0x7d6903a6; |
| 4211 | static const uint32_t mtctr_12 = 0x7d8903a6; |
| 4212 | static const uint32_t mtlr_0 = 0x7c0803a6; |
| 4213 | static const uint32_t mtlr_11 = 0x7d6803a6; |
| 4214 | static const uint32_t mtlr_12 = 0x7d8803a6; |
| 4215 | static const uint32_t nop = 0x60000000; |
| 4216 | static const uint32_t ori_0_0_0 = 0x60000000; |
| 4217 | static const uint32_t ori_11_11_0 = 0x616b0000; |
| 4218 | static const uint32_t ori_12_12_0 = 0x618c0000; |
| 4219 | static const uint32_t oris_12_12_0 = 0x658c0000; |
| 4220 | static const uint32_t sldi_11_11_34 = 0x796b1746; |
| 4221 | static const uint32_t sldi_12_12_32 = 0x799c07c6; |
| 4222 | static const uint32_t srdi_0_0_2 = 0x7800f082; |
| 4223 | static const uint32_t std_0_1 = 0xf8010000; |
| 4224 | static const uint32_t std_0_12 = 0xf80c0000; |
| 4225 | static const uint32_t std_2_1 = 0xf8410000; |
| 4226 | static const uint32_t std_11_1 = 0xf9610000; |
| 4227 | static const uint32_t stfd_0_1 = 0xd8010000; |
| 4228 | static const uint32_t stvx_0_12_0 = 0x7c0c01ce; |
| 4229 | static const uint32_t sub_11_11_12 = 0x7d6c5850; |
| 4230 | static const uint32_t sub_12_12_11 = 0x7d8b6050; |
| 4231 | static const uint32_t xor_2_12_12 = 0x7d826278; |
| 4232 | static const uint32_t xor_11_12_12 = 0x7d8b6278; |
| 4233 | |
| 4234 | static const uint64_t paddi_12_pc = 0x0610000039800000ULL; |
| 4235 | static const uint64_t pld_12_pc = 0x04100000e5800000ULL; |
| 4236 | static const uint64_t pnop = 0x0700000000000000ULL; |
| 4237 | |
| 4238 | // Write out the PLT. |
| 4239 | |
| 4240 | template<int size, bool big_endian> |
| 4241 | void |
| 4242 | Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of) |
| 4243 | { |
| 4244 | if (size == 32 && (this->name_[3] != 'I' && this->name_[3] != 'L')) |
| 4245 | { |
| 4246 | const section_size_type offset = this->offset(); |
| 4247 | const section_size_type oview_size |
| 4248 | = convert_to_section_size_type(this->data_size()); |
| 4249 | unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 4250 | unsigned char* pov = oview; |
| 4251 | unsigned char* endpov = oview + oview_size; |
| 4252 | |
| 4253 | // The address of the .glink branch table |
| 4254 | const Output_data_glink<size, big_endian>* glink |
| 4255 | = this->targ_->glink_section(); |
| 4256 | elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address(); |
| 4257 | |
| 4258 | while (pov < endpov) |
| 4259 | { |
| 4260 | elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab); |
| 4261 | pov += 4; |
| 4262 | branch_tab += 4; |
| 4263 | } |
| 4264 | |
| 4265 | of->write_output_view(offset, oview_size, oview); |
| 4266 | } |
| 4267 | } |
| 4268 | |
| 4269 | // Create the PLT section. |
| 4270 | |
| 4271 | template<int size, bool big_endian> |
| 4272 | void |
| 4273 | Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
| 4274 | Layout* layout) |
| 4275 | { |
| 4276 | if (this->plt_ == NULL) |
| 4277 | { |
| 4278 | if (this->got_ == NULL) |
| 4279 | this->got_section(symtab, layout); |
| 4280 | |
| 4281 | if (this->glink_ == NULL) |
| 4282 | make_glink_section(layout); |
| 4283 | |
| 4284 | // Ensure that .rela.dyn always appears before .rela.plt This is |
| 4285 | // necessary due to how, on PowerPC and some other targets, .rela.dyn |
| 4286 | // needs to include .rela.plt in its range. |
| 4287 | this->rela_dyn_section(layout); |
| 4288 | |
| 4289 | Reloc_section* plt_rel = new Reloc_section(false); |
| 4290 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, |
| 4291 | elfcpp::SHF_ALLOC, plt_rel, |
| 4292 | ORDER_DYNAMIC_PLT_RELOCS, false); |
| 4293 | this->plt_ |
| 4294 | = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel, |
| 4295 | "** PLT"); |
| 4296 | layout->add_output_section_data(".plt", |
| 4297 | (size == 32 |
| 4298 | ? elfcpp::SHT_PROGBITS |
| 4299 | : elfcpp::SHT_NOBITS), |
| 4300 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, |
| 4301 | this->plt_, |
| 4302 | (size == 32 |
| 4303 | ? ORDER_SMALL_DATA |
| 4304 | : ORDER_SMALL_BSS), |
| 4305 | false); |
| 4306 | |
| 4307 | Output_section* rela_plt_os = plt_rel->output_section(); |
| 4308 | rela_plt_os->set_info_section(this->plt_->output_section()); |
| 4309 | } |
| 4310 | } |
| 4311 | |
| 4312 | // Create the IPLT section. |
| 4313 | |
| 4314 | template<int size, bool big_endian> |
| 4315 | void |
| 4316 | Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab, |
| 4317 | Layout* layout) |
| 4318 | { |
| 4319 | if (this->iplt_ == NULL) |
| 4320 | { |
| 4321 | this->make_plt_section(symtab, layout); |
| 4322 | this->make_lplt_section(layout); |
| 4323 | |
| 4324 | Reloc_section* iplt_rel = new Reloc_section(false); |
| 4325 | if (this->rela_dyn_->output_section()) |
| 4326 | this->rela_dyn_->output_section()->add_output_section_data(iplt_rel); |
| 4327 | this->iplt_ |
| 4328 | = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel, |
| 4329 | "** IPLT"); |
| 4330 | if (this->plt_->output_section()) |
| 4331 | this->plt_->output_section()->add_output_section_data(this->iplt_); |
| 4332 | } |
| 4333 | } |
| 4334 | |
| 4335 | // Create the LPLT section. |
| 4336 | |
| 4337 | template<int size, bool big_endian> |
| 4338 | void |
| 4339 | Target_powerpc<size, big_endian>::make_lplt_section(Layout* layout) |
| 4340 | { |
| 4341 | if (this->lplt_ == NULL) |
| 4342 | { |
| 4343 | Reloc_section* lplt_rel = NULL; |
| 4344 | if (parameters->options().output_is_position_independent()) |
| 4345 | { |
| 4346 | lplt_rel = new Reloc_section(false); |
| 4347 | this->rela_dyn_section(layout); |
| 4348 | if (this->rela_dyn_->output_section()) |
| 4349 | this->rela_dyn_->output_section() |
| 4350 | ->add_output_section_data(lplt_rel); |
| 4351 | } |
| 4352 | this->lplt_ |
| 4353 | = new Output_data_plt_powerpc<size, big_endian>(this, lplt_rel, |
| 4354 | "** LPLT"); |
| 4355 | this->make_brlt_section(layout); |
| 4356 | if (this->brlt_section_ && this->brlt_section_->output_section()) |
| 4357 | this->brlt_section_->output_section() |
| 4358 | ->add_output_section_data(this->lplt_); |
| 4359 | else |
| 4360 | layout->add_output_section_data(".branch_lt", |
| 4361 | elfcpp::SHT_PROGBITS, |
| 4362 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, |
| 4363 | this->lplt_, |
| 4364 | ORDER_RELRO, |
| 4365 | true); |
| 4366 | } |
| 4367 | } |
| 4368 | |
| 4369 | // A section for huge long branch addresses, similar to plt section. |
| 4370 | |
| 4371 | template<int size, bool big_endian> |
| 4372 | class Output_data_brlt_powerpc : public Output_section_data_build |
| 4373 | { |
| 4374 | public: |
| 4375 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 4376 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, |
| 4377 | size, big_endian> Reloc_section; |
| 4378 | |
| 4379 | Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ, |
| 4380 | Reloc_section* brlt_rel) |
| 4381 | : Output_section_data_build(size == 32 ? 4 : 8), |
| 4382 | rel_(brlt_rel), |
| 4383 | targ_(targ) |
| 4384 | { } |
| 4385 | |
| 4386 | void |
| 4387 | reset_brlt_sizes() |
| 4388 | { |
| 4389 | this->reset_data_size(); |
| 4390 | this->rel_->reset_data_size(); |
| 4391 | } |
| 4392 | |
| 4393 | void |
| 4394 | finalize_brlt_sizes() |
| 4395 | { |
| 4396 | this->finalize_data_size(); |
| 4397 | this->rel_->finalize_data_size(); |
| 4398 | } |
| 4399 | |
| 4400 | // Add a reloc for an entry in the BRLT. |
| 4401 | void |
| 4402 | add_reloc(Address to, unsigned int off) |
| 4403 | { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); } |
| 4404 | |
| 4405 | // Update section and reloc section size. |
| 4406 | void |
| 4407 | set_current_size(unsigned int num_branches) |
| 4408 | { |
| 4409 | this->reset_address_and_file_offset(); |
| 4410 | this->set_current_data_size(num_branches * 16); |
| 4411 | this->finalize_data_size(); |
| 4412 | Output_section* os = this->output_section(); |
| 4413 | os->set_section_offsets_need_adjustment(); |
| 4414 | if (this->rel_ != NULL) |
| 4415 | { |
| 4416 | const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 4417 | this->rel_->reset_address_and_file_offset(); |
| 4418 | this->rel_->set_current_data_size(num_branches * reloc_size); |
| 4419 | this->rel_->finalize_data_size(); |
| 4420 | Output_section* os = this->rel_->output_section(); |
| 4421 | os->set_section_offsets_need_adjustment(); |
| 4422 | } |
| 4423 | } |
| 4424 | |
| 4425 | protected: |
| 4426 | void |
| 4427 | do_adjust_output_section(Output_section* os) |
| 4428 | { |
| 4429 | os->set_entsize(0); |
| 4430 | } |
| 4431 | |
| 4432 | // Write to a map file. |
| 4433 | void |
| 4434 | do_print_to_mapfile(Mapfile* mapfile) const |
| 4435 | { mapfile->print_output_data(this, "** BRLT"); } |
| 4436 | |
| 4437 | private: |
| 4438 | // Write out the BRLT data. |
| 4439 | void |
| 4440 | do_write(Output_file*); |
| 4441 | |
| 4442 | // The reloc section. |
| 4443 | Reloc_section* rel_; |
| 4444 | Target_powerpc<size, big_endian>* targ_; |
| 4445 | }; |
| 4446 | |
| 4447 | // Make the branch lookup table section. |
| 4448 | |
| 4449 | template<int size, bool big_endian> |
| 4450 | void |
| 4451 | Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout) |
| 4452 | { |
| 4453 | if (size == 64 && this->brlt_section_ == NULL) |
| 4454 | { |
| 4455 | Reloc_section* brlt_rel = NULL; |
| 4456 | bool is_pic = parameters->options().output_is_position_independent(); |
| 4457 | if (is_pic) |
| 4458 | { |
| 4459 | // When PIC we can't fill in .branch_lt but must initialise at |
| 4460 | // runtime via dynamic relocations. |
| 4461 | this->rela_dyn_section(layout); |
| 4462 | brlt_rel = new Reloc_section(false); |
| 4463 | if (this->rela_dyn_->output_section()) |
| 4464 | this->rela_dyn_->output_section() |
| 4465 | ->add_output_section_data(brlt_rel); |
| 4466 | } |
| 4467 | this->brlt_section_ |
| 4468 | = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel); |
| 4469 | if (this->plt_ && is_pic && this->plt_->output_section()) |
| 4470 | this->plt_->output_section() |
| 4471 | ->add_output_section_data(this->brlt_section_); |
| 4472 | else |
| 4473 | layout->add_output_section_data(".branch_lt", |
| 4474 | elfcpp::SHT_PROGBITS, |
| 4475 | elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE, |
| 4476 | this->brlt_section_, |
| 4477 | ORDER_RELRO, |
| 4478 | true); |
| 4479 | } |
| 4480 | } |
| 4481 | |
| 4482 | // Write out .branch_lt when non-PIC. |
| 4483 | |
| 4484 | template<int size, bool big_endian> |
| 4485 | void |
| 4486 | Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of) |
| 4487 | { |
| 4488 | if (size == 64 && !parameters->options().output_is_position_independent()) |
| 4489 | { |
| 4490 | const section_size_type offset = this->offset(); |
| 4491 | const section_size_type oview_size |
| 4492 | = convert_to_section_size_type(this->data_size()); |
| 4493 | unsigned char* const oview = of->get_output_view(offset, oview_size); |
| 4494 | |
| 4495 | this->targ_->write_branch_lookup_table(oview); |
| 4496 | of->write_output_view(offset, oview_size, oview); |
| 4497 | } |
| 4498 | } |
| 4499 | |
| 4500 | static inline uint32_t |
| 4501 | l(uint32_t a) |
| 4502 | { |
| 4503 | return a & 0xffff; |
| 4504 | } |
| 4505 | |
| 4506 | static inline uint32_t |
| 4507 | hi(uint32_t a) |
| 4508 | { |
| 4509 | return l(a >> 16); |
| 4510 | } |
| 4511 | |
| 4512 | static inline uint32_t |
| 4513 | ha(uint32_t a) |
| 4514 | { |
| 4515 | return hi(a + 0x8000); |
| 4516 | } |
| 4517 | |
| 4518 | static inline uint64_t |
| 4519 | d34(uint64_t v) |
| 4520 | { |
| 4521 | return ((v & 0x3ffff0000ULL) << 16) | (v & 0xffff); |
| 4522 | } |
| 4523 | |
| 4524 | static inline uint64_t |
| 4525 | ha34(uint64_t v) |
| 4526 | { |
| 4527 | return (v + (1ULL << 33)) >> 34; |
| 4528 | } |
| 4529 | |
| 4530 | template<int size> |
| 4531 | struct Eh_cie |
| 4532 | { |
| 4533 | static const unsigned char eh_frame_cie[12]; |
| 4534 | }; |
| 4535 | |
| 4536 | template<int size> |
| 4537 | const unsigned char Eh_cie<size>::eh_frame_cie[] = |
| 4538 | { |
| 4539 | 1, // CIE version. |
| 4540 | 'z', 'R', 0, // Augmentation string. |
| 4541 | 4, // Code alignment. |
| 4542 | 0x80 - size / 8 , // Data alignment. |
| 4543 | 65, // RA reg. |
| 4544 | 1, // Augmentation size. |
| 4545 | (elfcpp::DW_EH_PE_pcrel |
| 4546 | | elfcpp::DW_EH_PE_sdata4), // FDE encoding. |
| 4547 | elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0. |
| 4548 | }; |
| 4549 | |
| 4550 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1. |
| 4551 | static const unsigned char glink_eh_frame_fde_64v1[] = |
| 4552 | { |
| 4553 | 0, 0, 0, 0, // Replaced with offset to .glink. |
| 4554 | 0, 0, 0, 0, // Replaced with size of .glink. |
| 4555 | 0, // Augmentation size. |
| 4556 | elfcpp::DW_CFA_advance_loc + 1, |
| 4557 | elfcpp::DW_CFA_register, 65, 12, |
| 4558 | elfcpp::DW_CFA_advance_loc + 5, |
| 4559 | elfcpp::DW_CFA_restore_extended, 65 |
| 4560 | }; |
| 4561 | |
| 4562 | // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2. |
| 4563 | static const unsigned char glink_eh_frame_fde_64v2[] = |
| 4564 | { |
| 4565 | 0, 0, 0, 0, // Replaced with offset to .glink. |
| 4566 | 0, 0, 0, 0, // Replaced with size of .glink. |
| 4567 | 0, // Augmentation size. |
| 4568 | elfcpp::DW_CFA_advance_loc + 1, |
| 4569 | elfcpp::DW_CFA_register, 65, 0, |
| 4570 | elfcpp::DW_CFA_advance_loc + 7, |
| 4571 | elfcpp::DW_CFA_restore_extended, 65 |
| 4572 | }; |
| 4573 | |
| 4574 | // Describe __glink_PLTresolve use of LR, 32-bit version. |
| 4575 | static const unsigned char glink_eh_frame_fde_32[] = |
| 4576 | { |
| 4577 | 0, 0, 0, 0, // Replaced with offset to .glink. |
| 4578 | 0, 0, 0, 0, // Replaced with size of .glink. |
| 4579 | 0, // Augmentation size. |
| 4580 | elfcpp::DW_CFA_advance_loc + 2, |
| 4581 | elfcpp::DW_CFA_register, 65, 0, |
| 4582 | elfcpp::DW_CFA_advance_loc + 4, |
| 4583 | elfcpp::DW_CFA_restore_extended, 65 |
| 4584 | }; |
| 4585 | |
| 4586 | static const unsigned char default_fde[] = |
| 4587 | { |
| 4588 | 0, 0, 0, 0, // Replaced with offset to stubs. |
| 4589 | 0, 0, 0, 0, // Replaced with size of stubs. |
| 4590 | 0, // Augmentation size. |
| 4591 | elfcpp::DW_CFA_nop, // Pad. |
| 4592 | elfcpp::DW_CFA_nop, |
| 4593 | elfcpp::DW_CFA_nop |
| 4594 | }; |
| 4595 | |
| 4596 | template<bool big_endian> |
| 4597 | static inline void |
| 4598 | write_insn(unsigned char* p, uint32_t v) |
| 4599 | { |
| 4600 | elfcpp::Swap<32, big_endian>::writeval(p, v); |
| 4601 | } |
| 4602 | |
| 4603 | template<int size> |
| 4604 | static inline unsigned int |
| 4605 | param_plt_align() |
| 4606 | { |
| 4607 | if (!parameters->options().user_set_plt_align()) |
| 4608 | return size == 64 ? 32 : 8; |
| 4609 | return 1 << parameters->options().plt_align(); |
| 4610 | } |
| 4611 | |
| 4612 | // Stub_table holds information about plt and long branch stubs. |
| 4613 | // Stubs are built in an area following some input section determined |
| 4614 | // by group_sections(). This input section is converted to a relaxed |
| 4615 | // input section allowing it to be resized to accommodate the stubs |
| 4616 | |
| 4617 | template<int size, bool big_endian> |
| 4618 | class Stub_table : public Output_relaxed_input_section |
| 4619 | { |
| 4620 | public: |
| 4621 | struct Plt_stub_ent |
| 4622 | { |
| 4623 | Plt_stub_ent(unsigned int off, unsigned int indx) |
| 4624 | : off_(off), indx_(indx), iter_(0), notoc_(0), r2save_(0), localentry0_(0) |
| 4625 | { } |
| 4626 | |
| 4627 | unsigned int off_; |
| 4628 | unsigned int indx_ : 28; |
| 4629 | unsigned int iter_ : 1; |
| 4630 | unsigned int notoc_ : 1; |
| 4631 | unsigned int r2save_ : 1; |
| 4632 | unsigned int localentry0_ : 1; |
| 4633 | }; |
| 4634 | struct Branch_stub_ent |
| 4635 | { |
| 4636 | Branch_stub_ent(unsigned int off, bool notoc, bool save_res) |
| 4637 | : off_(off), iter_(false), notoc_(notoc), save_res_(save_res) |
| 4638 | { } |
| 4639 | |
| 4640 | unsigned int off_; |
| 4641 | bool iter_; |
| 4642 | bool notoc_; |
| 4643 | bool save_res_; |
| 4644 | }; |
| 4645 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 4646 | static const Address invalid_address = static_cast<Address>(0) - 1; |
| 4647 | |
| 4648 | Stub_table(Target_powerpc<size, big_endian>* targ, |
| 4649 | Output_section* output_section, |
| 4650 | const Output_section::Input_section* owner, |
| 4651 | uint32_t id) |
| 4652 | : Output_relaxed_input_section(owner->relobj(), owner->shndx(), |
| 4653 | owner->relobj() |
| 4654 | ->section_addralign(owner->shndx())), |
| 4655 | targ_(targ), plt_call_stubs_(), long_branch_stubs_(), |
| 4656 | orig_data_size_(owner->current_data_size()), |
| 4657 | plt_size_(0), last_plt_size_(0), |
| 4658 | branch_size_(0), last_branch_size_(0), min_size_threshold_(0), |
| 4659 | need_save_res_(false), need_resize_(false), resizing_(false), |
| 4660 | uniq_(id) |
| 4661 | { |
| 4662 | this->set_output_section(output_section); |
| 4663 | |
| 4664 | std::vector<Output_relaxed_input_section*> new_relaxed; |
| 4665 | new_relaxed.push_back(this); |
| 4666 | output_section->convert_input_sections_to_relaxed_sections(new_relaxed); |
| 4667 | } |
| 4668 | |
| 4669 | // Add a plt call stub. |
| 4670 | bool |
| 4671 | add_plt_call_entry(Address, |
| 4672 | const Sized_relobj_file<size, big_endian>*, |
| 4673 | const Symbol*, |
| 4674 | unsigned int, |
| 4675 | Address, |
| 4676 | bool); |
| 4677 | |
| 4678 | bool |
| 4679 | add_plt_call_entry(Address, |
| 4680 | const Sized_relobj_file<size, big_endian>*, |
| 4681 | unsigned int, |
| 4682 | unsigned int, |
| 4683 | Address, |
| 4684 | bool); |
| 4685 | |
| 4686 | // Find a given plt call stub. |
| 4687 | const Plt_stub_ent* |
| 4688 | find_plt_call_entry(const Symbol*) const; |
| 4689 | |
| 4690 | const Plt_stub_ent* |
| 4691 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
| 4692 | unsigned int) const; |
| 4693 | |
| 4694 | const Plt_stub_ent* |
| 4695 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
| 4696 | const Symbol*, |
| 4697 | unsigned int, |
| 4698 | Address) const; |
| 4699 | |
| 4700 | const Plt_stub_ent* |
| 4701 | find_plt_call_entry(const Sized_relobj_file<size, big_endian>*, |
| 4702 | unsigned int, |
| 4703 | unsigned int, |
| 4704 | Address) const; |
| 4705 | |
| 4706 | // Add a long branch stub. |
| 4707 | bool |
| 4708 | add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
| 4709 | unsigned int, Address, Address, bool); |
| 4710 | |
| 4711 | const Branch_stub_ent* |
| 4712 | find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, |
| 4713 | Address) const; |
| 4714 | |
| 4715 | bool |
| 4716 | can_reach_stub(Address from, unsigned int off, unsigned int r_type) |
| 4717 | { |
| 4718 | Address max_branch_offset = max_branch_delta<size>(r_type); |
| 4719 | if (max_branch_offset == 0) |
| 4720 | return true; |
| 4721 | gold_assert(from != invalid_address); |
| 4722 | Address loc = off + this->stub_address(); |
| 4723 | return loc - from + max_branch_offset < 2 * max_branch_offset; |
| 4724 | } |
| 4725 | |
| 4726 | void |
| 4727 | clear_stubs(bool all) |
| 4728 | { |
| 4729 | this->plt_call_stubs_.clear(); |
| 4730 | this->plt_size_ = 0; |
| 4731 | this->long_branch_stubs_.clear(); |
| 4732 | this->branch_size_ = 0; |
| 4733 | this->need_save_res_ = false; |
| 4734 | if (all) |
| 4735 | { |
| 4736 | this->last_plt_size_ = 0; |
| 4737 | this->last_branch_size_ = 0; |
| 4738 | } |
| 4739 | } |
| 4740 | |
| 4741 | bool |
| 4742 | need_resize() const |
| 4743 | { return need_resize_; } |
| 4744 | |
| 4745 | void |
| 4746 | set_resizing(bool val) |
| 4747 | { |
| 4748 | this->resizing_ = val; |
| 4749 | if (val) |
| 4750 | { |
| 4751 | this->need_resize_ = false; |
| 4752 | this->plt_size_ = 0; |
| 4753 | this->branch_size_ = 0; |
| 4754 | this->need_save_res_ = false; |
| 4755 | } |
| 4756 | } |
| 4757 | |
| 4758 | Address |
| 4759 | set_address_and_size(const Output_section* os, Address off) |
| 4760 | { |
| 4761 | Address start_off = off; |
| 4762 | off += this->orig_data_size_; |
| 4763 | Address my_size = this->plt_size_ + this->branch_size_; |
| 4764 | if (this->need_save_res_) |
| 4765 | my_size += this->targ_->savres_section()->data_size(); |
| 4766 | if (my_size != 0) |
| 4767 | off = align_address(off, this->stub_align()); |
| 4768 | // Include original section size and alignment padding in size |
| 4769 | my_size += off - start_off; |
| 4770 | // Ensure new size is always larger than min size |
| 4771 | // threshold. Alignment requirement is included in "my_size", so |
| 4772 | // increase "my_size" does not invalidate alignment. |
| 4773 | if (my_size < this->min_size_threshold_) |
| 4774 | my_size = this->min_size_threshold_; |
| 4775 | this->reset_address_and_file_offset(); |
| 4776 | this->set_current_data_size(my_size); |
| 4777 | this->set_address_and_file_offset(os->address() + start_off, |
| 4778 | os->offset() + start_off); |
| 4779 | return my_size; |
| 4780 | } |
| 4781 | |
| 4782 | Address |
| 4783 | stub_address() const |
| 4784 | { |
| 4785 | return align_address(this->address() + this->orig_data_size_, |
| 4786 | this->stub_align()); |
| 4787 | } |
| 4788 | |
| 4789 | Address |
| 4790 | stub_offset() const |
| 4791 | { |
| 4792 | return align_address(this->offset() + this->orig_data_size_, |
| 4793 | this->stub_align()); |
| 4794 | } |
| 4795 | |
| 4796 | section_size_type |
| 4797 | plt_size() const |
| 4798 | { return this->plt_size_; } |
| 4799 | |
| 4800 | section_size_type |
| 4801 | branch_size() const |
| 4802 | { return this->branch_size_; } |
| 4803 | |
| 4804 | void |
| 4805 | set_min_size_threshold(Address min_size) |
| 4806 | { this->min_size_threshold_ = min_size; } |
| 4807 | |
| 4808 | void |
| 4809 | define_stub_syms(Symbol_table*); |
| 4810 | |
| 4811 | bool |
| 4812 | size_update() |
| 4813 | { |
| 4814 | Output_section* os = this->output_section(); |
| 4815 | if (os->addralign() < this->stub_align()) |
| 4816 | { |
| 4817 | os->set_addralign(this->stub_align()); |
| 4818 | // FIXME: get rid of the insane checkpointing. |
| 4819 | // We can't increase alignment of the input section to which |
| 4820 | // stubs are attached; The input section may be .init which |
| 4821 | // is pasted together with other .init sections to form a |
| 4822 | // function. Aligning might insert zero padding resulting in |
| 4823 | // sigill. However we do need to increase alignment of the |
| 4824 | // output section so that the align_address() on offset in |
| 4825 | // set_address_and_size() adds the same padding as the |
| 4826 | // align_address() on address in stub_address(). |
| 4827 | // What's more, we need this alignment for the layout done in |
| 4828 | // relaxation_loop_body() so that the output section starts at |
| 4829 | // a suitably aligned address. |
| 4830 | os->checkpoint_set_addralign(this->stub_align()); |
| 4831 | } |
| 4832 | if (this->last_plt_size_ != this->plt_size_ |
| 4833 | || this->last_branch_size_ != this->branch_size_) |
| 4834 | { |
| 4835 | this->last_plt_size_ = this->plt_size_; |
| 4836 | this->last_branch_size_ = this->branch_size_; |
| 4837 | return true; |
| 4838 | } |
| 4839 | return false; |
| 4840 | } |
| 4841 | |
| 4842 | // Add .eh_frame info for this stub section. |
| 4843 | void |
| 4844 | add_eh_frame(Layout* layout); |
| 4845 | |
| 4846 | // Remove .eh_frame info for this stub section. |
| 4847 | void |
| 4848 | remove_eh_frame(Layout* layout); |
| 4849 | |
| 4850 | Target_powerpc<size, big_endian>* |
| 4851 | targ() const |
| 4852 | { return targ_; } |
| 4853 | |
| 4854 | private: |
| 4855 | class Plt_stub_key; |
| 4856 | class Plt_stub_key_hash; |
| 4857 | typedef Unordered_map<Plt_stub_key, Plt_stub_ent, |
| 4858 | Plt_stub_key_hash> Plt_stub_entries; |
| 4859 | class Branch_stub_key; |
| 4860 | class Branch_stub_key_hash; |
| 4861 | typedef Unordered_map<Branch_stub_key, Branch_stub_ent, |
| 4862 | Branch_stub_key_hash> Branch_stub_entries; |
| 4863 | |
| 4864 | // Alignment of stub section. |
| 4865 | unsigned int |
| 4866 | stub_align() const |
| 4867 | { |
| 4868 | unsigned int min_align = size == 64 ? 32 : 16; |
| 4869 | unsigned int user_align = 1 << parameters->options().plt_align(); |
| 4870 | return std::max(user_align, min_align); |
| 4871 | } |
| 4872 | |
| 4873 | // Return the plt offset for the given call stub. |
| 4874 | Address |
| 4875 | plt_off(typename Plt_stub_entries::const_iterator p, |
| 4876 | const Output_data_plt_powerpc<size, big_endian>** sec) const |
| 4877 | { |
| 4878 | const Symbol* gsym = p->first.sym_; |
| 4879 | if (gsym != NULL) |
| 4880 | return this->targ_->plt_off(gsym, sec); |
| 4881 | else |
| 4882 | { |
| 4883 | const Sized_relobj_file<size, big_endian>* relobj = p->first.object_; |
| 4884 | unsigned int local_sym_index = p->first.locsym_; |
| 4885 | return this->targ_->plt_off(relobj, local_sym_index, sec); |
| 4886 | } |
| 4887 | } |
| 4888 | |
| 4889 | // Size of a given plt call stub. |
| 4890 | unsigned int |
| 4891 | plt_call_size(typename Plt_stub_entries::const_iterator p) const; |
| 4892 | |
| 4893 | unsigned int |
| 4894 | plt_call_align(unsigned int bytes) const |
| 4895 | { |
| 4896 | unsigned int align = param_plt_align<size>(); |
| 4897 | return (bytes + align - 1) & -align; |
| 4898 | } |
| 4899 | |
| 4900 | // Return long branch stub size. |
| 4901 | unsigned int |
| 4902 | branch_stub_size(typename Branch_stub_entries::const_iterator p, |
| 4903 | bool* need_lt); |
| 4904 | |
| 4905 | bool |
| 4906 | build_tls_opt_head(unsigned char** pp, |
| 4907 | typename Plt_stub_entries::const_iterator cs); |
| 4908 | |
| 4909 | bool |
| 4910 | build_tls_opt_tail(unsigned char* p, |
| 4911 | typename Plt_stub_entries::const_iterator cs); |
| 4912 | |
| 4913 | void |
| 4914 | plt_error(const Plt_stub_key& p); |
| 4915 | |
| 4916 | // Write out stubs. |
| 4917 | void |
| 4918 | do_write(Output_file*); |
| 4919 | |
| 4920 | // Plt call stub keys. |
| 4921 | class Plt_stub_key |
| 4922 | { |
| 4923 | public: |
| 4924 | Plt_stub_key(const Symbol* sym) |
| 4925 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
| 4926 | { } |
| 4927 | |
| 4928 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
| 4929 | unsigned int locsym_index) |
| 4930 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
| 4931 | { } |
| 4932 | |
| 4933 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
| 4934 | const Symbol* sym, |
| 4935 | unsigned int r_type, |
| 4936 | Address addend) |
| 4937 | : sym_(sym), object_(0), addend_(0), locsym_(0) |
| 4938 | { |
| 4939 | if (size != 32) |
| 4940 | this->addend_ = addend; |
| 4941 | else if (parameters->options().output_is_position_independent() |
| 4942 | && (r_type == elfcpp::R_PPC_PLTREL24 |
| 4943 | || r_type == elfcpp::R_POWERPC_PLTCALL)) |
| 4944 | { |
| 4945 | this->addend_ = addend; |
| 4946 | if (this->addend_ >= 32768) |
| 4947 | this->object_ = object; |
| 4948 | } |
| 4949 | } |
| 4950 | |
| 4951 | Plt_stub_key(const Sized_relobj_file<size, big_endian>* object, |
| 4952 | unsigned int locsym_index, |
| 4953 | unsigned int r_type, |
| 4954 | Address addend) |
| 4955 | : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index) |
| 4956 | { |
| 4957 | if (size != 32) |
| 4958 | this->addend_ = addend; |
| 4959 | else if (parameters->options().output_is_position_independent() |
| 4960 | && (r_type == elfcpp::R_PPC_PLTREL24 |
| 4961 | || r_type == elfcpp::R_POWERPC_PLTCALL)) |
| 4962 | this->addend_ = addend; |
| 4963 | } |
| 4964 | |
| 4965 | bool operator==(const Plt_stub_key& that) const |
| 4966 | { |
| 4967 | return (this->sym_ == that.sym_ |
| 4968 | && this->object_ == that.object_ |
| 4969 | && this->addend_ == that.addend_ |
| 4970 | && this->locsym_ == that.locsym_); |
| 4971 | } |
| 4972 | |
| 4973 | const Symbol* sym_; |
| 4974 | const Sized_relobj_file<size, big_endian>* object_; |
| 4975 | typename elfcpp::Elf_types<size>::Elf_Addr addend_; |
| 4976 | unsigned int locsym_; |
| 4977 | }; |
| 4978 | |
| 4979 | class Plt_stub_key_hash |
| 4980 | { |
| 4981 | public: |
| 4982 | size_t operator()(const Plt_stub_key& ent) const |
| 4983 | { |
| 4984 | return (reinterpret_cast<uintptr_t>(ent.sym_) |
| 4985 | ^ reinterpret_cast<uintptr_t>(ent.object_) |
| 4986 | ^ ent.addend_ |
| 4987 | ^ ent.locsym_); |
| 4988 | } |
| 4989 | }; |
| 4990 | |
| 4991 | // Long branch stub keys. |
| 4992 | class Branch_stub_key |
| 4993 | { |
| 4994 | public: |
| 4995 | Branch_stub_key(const Powerpc_relobj<size, big_endian>* obj, Address to) |
| 4996 | : dest_(to), toc_base_off_(0) |
| 4997 | { |
| 4998 | if (size == 64) |
| 4999 | toc_base_off_ = obj->toc_base_offset(); |
| 5000 | } |
| 5001 | |
| 5002 | bool operator==(const Branch_stub_key& that) const |
| 5003 | { |
| 5004 | return (this->dest_ == that.dest_ |
| 5005 | && (size == 32 |
| 5006 | || this->toc_base_off_ == that.toc_base_off_)); |
| 5007 | } |
| 5008 | |
| 5009 | Address dest_; |
| 5010 | unsigned int toc_base_off_; |
| 5011 | }; |
| 5012 | |
| 5013 | class Branch_stub_key_hash |
| 5014 | { |
| 5015 | public: |
| 5016 | size_t operator()(const Branch_stub_key& key) const |
| 5017 | { return key.dest_ ^ key.toc_base_off_; } |
| 5018 | }; |
| 5019 | |
| 5020 | // In a sane world this would be a global. |
| 5021 | Target_powerpc<size, big_endian>* targ_; |
| 5022 | // Map sym/object/addend to stub offset. |
| 5023 | Plt_stub_entries plt_call_stubs_; |
| 5024 | // Map destination address to stub offset. |
| 5025 | Branch_stub_entries long_branch_stubs_; |
| 5026 | // size of input section |
| 5027 | section_size_type orig_data_size_; |
| 5028 | // size of stubs |
| 5029 | section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_; |
| 5030 | // Some rare cases cause (PR/20529) fluctuation in stub table |
| 5031 | // size, which leads to an endless relax loop. This is to be fixed |
| 5032 | // by, after the first few iterations, allowing only increase of |
| 5033 | // stub table size. This variable sets the minimal possible size of |
| 5034 | // a stub table, it is zero for the first few iterations, then |
| 5035 | // increases monotonically. |
| 5036 | Address min_size_threshold_; |
| 5037 | // Set if this stub group needs a copy of out-of-line register |
| 5038 | // save/restore functions. |
| 5039 | bool need_save_res_; |
| 5040 | // Set when notoc_/r2save_ changes after sizing a stub |
| 5041 | bool need_resize_; |
| 5042 | // Set when resizing stubs |
| 5043 | bool resizing_; |
| 5044 | // Per stub table unique identifier. |
| 5045 | uint32_t uniq_; |
| 5046 | }; |
| 5047 | |
| 5048 | // Add a plt call stub, if we do not already have one for this |
| 5049 | // sym/object/addend combo. |
| 5050 | |
| 5051 | template<int size, bool big_endian> |
| 5052 | bool |
| 5053 | Stub_table<size, big_endian>::add_plt_call_entry( |
| 5054 | Address from, |
| 5055 | const Sized_relobj_file<size, big_endian>* object, |
| 5056 | const Symbol* gsym, |
| 5057 | unsigned int r_type, |
| 5058 | Address addend, |
| 5059 | bool tocsave) |
| 5060 | { |
| 5061 | Plt_stub_key key(object, gsym, r_type, addend); |
| 5062 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); |
| 5063 | std::pair<typename Plt_stub_entries::iterator, bool> p |
| 5064 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
| 5065 | if (size == 64) |
| 5066 | { |
| 5067 | if (p.second |
| 5068 | && this->targ_->is_elfv2_localentry0(gsym)) |
| 5069 | { |
| 5070 | p.first->second.localentry0_ = 1; |
| 5071 | this->targ_->set_has_localentry0(); |
| 5072 | } |
| 5073 | if (r_type == elfcpp::R_PPC64_REL24_NOTOC) |
| 5074 | { |
| 5075 | if (!p.second && !p.first->second.notoc_ |
| 5076 | && !this->targ_->powerxx_stubs()) |
| 5077 | this->need_resize_ = true; |
| 5078 | p.first->second.notoc_ = 1; |
| 5079 | } |
| 5080 | else if (!tocsave && !p.first->second.localentry0_) |
| 5081 | { |
| 5082 | if (!p.second && !p.first->second.r2save_) |
| 5083 | this->need_resize_ = true; |
| 5084 | p.first->second.r2save_ = 1; |
| 5085 | } |
| 5086 | } |
| 5087 | if (p.second || (this->resizing_ && !p.first->second.iter_)) |
| 5088 | { |
| 5089 | if (this->resizing_) |
| 5090 | { |
| 5091 | p.first->second.iter_ = 1; |
| 5092 | p.first->second.off_ = this->plt_size_; |
| 5093 | } |
| 5094 | this->plt_size_ += this->plt_call_size(p.first); |
| 5095 | if (this->targ_->is_tls_get_addr_opt(gsym)) |
| 5096 | this->targ_->set_has_tls_get_addr_opt(); |
| 5097 | this->plt_size_ = this->plt_call_align(this->plt_size_); |
| 5098 | } |
| 5099 | return this->can_reach_stub(from, p.first->second.off_, r_type); |
| 5100 | } |
| 5101 | |
| 5102 | template<int size, bool big_endian> |
| 5103 | bool |
| 5104 | Stub_table<size, big_endian>::add_plt_call_entry( |
| 5105 | Address from, |
| 5106 | const Sized_relobj_file<size, big_endian>* object, |
| 5107 | unsigned int locsym_index, |
| 5108 | unsigned int r_type, |
| 5109 | Address addend, |
| 5110 | bool tocsave) |
| 5111 | { |
| 5112 | Plt_stub_key key(object, locsym_index, r_type, addend); |
| 5113 | Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size()); |
| 5114 | std::pair<typename Plt_stub_entries::iterator, bool> p |
| 5115 | = this->plt_call_stubs_.insert(std::make_pair(key, ent)); |
| 5116 | if (size == 64) |
| 5117 | { |
| 5118 | if (p.second |
| 5119 | && this->targ_->is_elfv2_localentry0(object, locsym_index)) |
| 5120 | { |
| 5121 | p.first->second.localentry0_ = 1; |
| 5122 | this->targ_->set_has_localentry0(); |
| 5123 | } |
| 5124 | if (r_type == elfcpp::R_PPC64_REL24_NOTOC) |
| 5125 | { |
| 5126 | if (!p.second && !p.first->second.notoc_ |
| 5127 | && !this->targ_->powerxx_stubs()) |
| 5128 | this->need_resize_ = true; |
| 5129 | p.first->second.notoc_ = 1; |
| 5130 | } |
| 5131 | else if (!tocsave && !p.first->second.localentry0_) |
| 5132 | { |
| 5133 | if (!p.second && !p.first->second.r2save_) |
| 5134 | this->need_resize_ = true; |
| 5135 | p.first->second.r2save_ = 1; |
| 5136 | } |
| 5137 | } |
| 5138 | if (p.second || (this->resizing_ && !p.first->second.iter_)) |
| 5139 | { |
| 5140 | if (this->resizing_) |
| 5141 | { |
| 5142 | p.first->second.iter_ = 1; |
| 5143 | p.first->second.off_ = this->plt_size_; |
| 5144 | } |
| 5145 | this->plt_size_ += this->plt_call_size(p.first); |
| 5146 | this->plt_size_ = this->plt_call_align(this->plt_size_); |
| 5147 | } |
| 5148 | return this->can_reach_stub(from, p.first->second.off_, r_type); |
| 5149 | } |
| 5150 | |
| 5151 | // Find a plt call stub. |
| 5152 | |
| 5153 | template<int size, bool big_endian> |
| 5154 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
| 5155 | Stub_table<size, big_endian>::find_plt_call_entry( |
| 5156 | const Sized_relobj_file<size, big_endian>* object, |
| 5157 | const Symbol* gsym, |
| 5158 | unsigned int r_type, |
| 5159 | Address addend) const |
| 5160 | { |
| 5161 | Plt_stub_key key(object, gsym, r_type, addend); |
| 5162 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); |
| 5163 | if (p == this->plt_call_stubs_.end()) |
| 5164 | return NULL; |
| 5165 | return &p->second; |
| 5166 | } |
| 5167 | |
| 5168 | template<int size, bool big_endian> |
| 5169 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
| 5170 | Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const |
| 5171 | { |
| 5172 | Plt_stub_key key(gsym); |
| 5173 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); |
| 5174 | if (p == this->plt_call_stubs_.end()) |
| 5175 | return NULL; |
| 5176 | return &p->second; |
| 5177 | } |
| 5178 | |
| 5179 | template<int size, bool big_endian> |
| 5180 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
| 5181 | Stub_table<size, big_endian>::find_plt_call_entry( |
| 5182 | const Sized_relobj_file<size, big_endian>* object, |
| 5183 | unsigned int locsym_index, |
| 5184 | unsigned int r_type, |
| 5185 | Address addend) const |
| 5186 | { |
| 5187 | Plt_stub_key key(object, locsym_index, r_type, addend); |
| 5188 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); |
| 5189 | if (p == this->plt_call_stubs_.end()) |
| 5190 | return NULL; |
| 5191 | return &p->second; |
| 5192 | } |
| 5193 | |
| 5194 | template<int size, bool big_endian> |
| 5195 | const typename Stub_table<size, big_endian>::Plt_stub_ent* |
| 5196 | Stub_table<size, big_endian>::find_plt_call_entry( |
| 5197 | const Sized_relobj_file<size, big_endian>* object, |
| 5198 | unsigned int locsym_index) const |
| 5199 | { |
| 5200 | Plt_stub_key key(object, locsym_index); |
| 5201 | typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key); |
| 5202 | if (p == this->plt_call_stubs_.end()) |
| 5203 | return NULL; |
| 5204 | return &p->second; |
| 5205 | } |
| 5206 | |
| 5207 | // Add a long branch stub if we don't already have one to given |
| 5208 | // destination. |
| 5209 | |
| 5210 | template<int size, bool big_endian> |
| 5211 | bool |
| 5212 | Stub_table<size, big_endian>::add_long_branch_entry( |
| 5213 | const Powerpc_relobj<size, big_endian>* object, |
| 5214 | unsigned int r_type, |
| 5215 | Address from, |
| 5216 | Address to, |
| 5217 | bool save_res) |
| 5218 | { |
| 5219 | Branch_stub_key key(object, to); |
| 5220 | bool notoc = (size == 64 && r_type == elfcpp::R_PPC64_REL24_NOTOC); |
| 5221 | Branch_stub_ent ent(this->branch_size_, notoc, save_res); |
| 5222 | std::pair<typename Branch_stub_entries::iterator, bool> p |
| 5223 | = this->long_branch_stubs_.insert(std::make_pair(key, ent)); |
| 5224 | if (notoc && !p.first->second.notoc_) |
| 5225 | { |
| 5226 | this->need_resize_ = true; |
| 5227 | p.first->second.notoc_ = true; |
| 5228 | } |
| 5229 | gold_assert(save_res == p.first->second.save_res_); |
| 5230 | if (p.second || (this->resizing_ && !p.first->second.iter_)) |
| 5231 | { |
| 5232 | if (this->resizing_) |
| 5233 | { |
| 5234 | p.first->second.iter_ = 1; |
| 5235 | p.first->second.off_ = this->branch_size_; |
| 5236 | } |
| 5237 | if (save_res) |
| 5238 | this->need_save_res_ = true; |
| 5239 | else |
| 5240 | { |
| 5241 | bool need_lt = false; |
| 5242 | unsigned int stub_size = this->branch_stub_size(p.first, &need_lt); |
| 5243 | this->branch_size_ += stub_size; |
| 5244 | if (size == 64 && need_lt) |
| 5245 | this->targ_->add_branch_lookup_table(to); |
| 5246 | } |
| 5247 | } |
| 5248 | return this->can_reach_stub(from, p.first->second.off_, r_type); |
| 5249 | } |
| 5250 | |
| 5251 | // Find long branch stub offset. |
| 5252 | |
| 5253 | template<int size, bool big_endian> |
| 5254 | const typename Stub_table<size, big_endian>::Branch_stub_ent* |
| 5255 | Stub_table<size, big_endian>::find_long_branch_entry( |
| 5256 | const Powerpc_relobj<size, big_endian>* object, |
| 5257 | Address to) const |
| 5258 | { |
| 5259 | Branch_stub_key key(object, to); |
| 5260 | typename Branch_stub_entries::const_iterator p |
| 5261 | = this->long_branch_stubs_.find(key); |
| 5262 | if (p == this->long_branch_stubs_.end()) |
| 5263 | return NULL; |
| 5264 | return &p->second; |
| 5265 | } |
| 5266 | |
| 5267 | template<bool big_endian> |
| 5268 | static void |
| 5269 | eh_advance (std::vector<unsigned char>& fde, unsigned int delta) |
| 5270 | { |
| 5271 | delta /= 4; |
| 5272 | if (delta < 64) |
| 5273 | fde.push_back(elfcpp::DW_CFA_advance_loc + delta); |
| 5274 | else if (delta < 256) |
| 5275 | { |
| 5276 | fde.push_back(elfcpp::DW_CFA_advance_loc1); |
| 5277 | fde.push_back(delta); |
| 5278 | } |
| 5279 | else if (delta < 65536) |
| 5280 | { |
| 5281 | fde.resize(fde.size() + 3); |
| 5282 | unsigned char *p = &*fde.end() - 3; |
| 5283 | *p++ = elfcpp::DW_CFA_advance_loc2; |
| 5284 | elfcpp::Swap<16, big_endian>::writeval(p, delta); |
| 5285 | } |
| 5286 | else |
| 5287 | { |
| 5288 | fde.resize(fde.size() + 5); |
| 5289 | unsigned char *p = &*fde.end() - 5; |
| 5290 | *p++ = elfcpp::DW_CFA_advance_loc4; |
| 5291 | elfcpp::Swap<32, big_endian>::writeval(p, delta); |
| 5292 | } |
| 5293 | } |
| 5294 | |
| 5295 | template<typename T> |
| 5296 | static bool |
| 5297 | stub_sort(T s1, T s2) |
| 5298 | { |
| 5299 | return s1->second.off_ < s2->second.off_; |
| 5300 | } |
| 5301 | |
| 5302 | // Add .eh_frame info for this stub section. Unlike other linker |
| 5303 | // generated .eh_frame this is added late in the link, because we |
| 5304 | // only want the .eh_frame info if this particular stub section is |
| 5305 | // non-empty. |
| 5306 | |
| 5307 | template<int size, bool big_endian> |
| 5308 | void |
| 5309 | Stub_table<size, big_endian>::add_eh_frame(Layout* layout) |
| 5310 | { |
| 5311 | if (size != 64 |
| 5312 | || !parameters->options().ld_generated_unwind_info()) |
| 5313 | return; |
| 5314 | |
| 5315 | // Since we add stub .eh_frame info late, it must be placed |
| 5316 | // after all other linker generated .eh_frame info so that |
| 5317 | // merge mapping need not be updated for input sections. |
| 5318 | // There is no provision to use a different CIE to that used |
| 5319 | // by .glink. |
| 5320 | if (!this->targ_->has_glink()) |
| 5321 | return; |
| 5322 | |
| 5323 | typedef typename Plt_stub_entries::const_iterator plt_iter; |
| 5324 | std::vector<plt_iter> calls; |
| 5325 | if (!this->plt_call_stubs_.empty()) |
| 5326 | for (plt_iter cs = this->plt_call_stubs_.begin(); |
| 5327 | cs != this->plt_call_stubs_.end(); |
| 5328 | ++cs) |
| 5329 | if ((this->targ_->is_tls_get_addr_opt(cs->first.sym_) |
| 5330 | && cs->second.r2save_ |
| 5331 | && !cs->second.localentry0_) |
| 5332 | || (cs->second.notoc_ |
| 5333 | && !this->targ_->powerxx_stubs())) |
| 5334 | calls.push_back(cs); |
| 5335 | if (calls.size() > 1) |
| 5336 | std::stable_sort(calls.begin(), calls.end(), |
| 5337 | stub_sort<plt_iter>); |
| 5338 | |
| 5339 | typedef typename Branch_stub_entries::const_iterator branch_iter; |
| 5340 | std::vector<branch_iter> branches; |
| 5341 | if (!this->long_branch_stubs_.empty() |
| 5342 | && !this->targ_->powerxx_stubs()) |
| 5343 | for (branch_iter bs = this->long_branch_stubs_.begin(); |
| 5344 | bs != this->long_branch_stubs_.end(); |
| 5345 | ++bs) |
| 5346 | if (bs->second.notoc_) |
| 5347 | branches.push_back(bs); |
| 5348 | if (branches.size() > 1) |
| 5349 | std::stable_sort(branches.begin(), branches.end(), |
| 5350 | stub_sort<branch_iter>); |
| 5351 | |
| 5352 | if (calls.empty() && branches.empty()) |
| 5353 | return; |
| 5354 | |
| 5355 | unsigned int last_eh_loc = 0; |
| 5356 | // offset pcrel sdata4, size udata4, and augmentation size byte. |
| 5357 | std::vector<unsigned char> fde(9, 0); |
| 5358 | |
| 5359 | for (unsigned int i = 0; i < calls.size(); i++) |
| 5360 | { |
| 5361 | plt_iter cs = calls[i]; |
| 5362 | unsigned int off = cs->second.off_; |
| 5363 | // The __tls_get_addr_opt call stub needs to describe where |
| 5364 | // it saves LR, to support exceptions that might be thrown |
| 5365 | // from __tls_get_addr, and to support asynchronous exceptions. |
| 5366 | if (this->targ_->is_tls_get_addr_opt(cs->first.sym_)) |
| 5367 | { |
| 5368 | off += 7 * 4; |
| 5369 | if (cs->second.r2save_ |
| 5370 | && !cs->second.localentry0_) |
| 5371 | { |
| 5372 | off += 2 * 4; |
| 5373 | eh_advance<big_endian>(fde, off - last_eh_loc); |
| 5374 | fde.resize(fde.size() + 6); |
| 5375 | unsigned char* p = &*fde.end() - 6; |
| 5376 | *p++ = elfcpp::DW_CFA_offset_extended_sf; |
| 5377 | *p++ = 65; |
| 5378 | *p++ = -(this->targ_->stk_linker() / 8) & 0x7f; |
| 5379 | unsigned int delta = this->plt_call_size(cs) - 4 - 9 * 4; |
| 5380 | *p++ = elfcpp::DW_CFA_advance_loc + delta / 4; |
| 5381 | *p++ = elfcpp::DW_CFA_restore_extended; |
| 5382 | *p++ = 65; |
| 5383 | last_eh_loc = off + delta; |
| 5384 | continue; |
| 5385 | } |
| 5386 | } |
| 5387 | // notoc stubs also should describe LR changes, to support |
| 5388 | // asynchronous exceptions. |
| 5389 | off += (cs->second.r2save_ ? 4 : 0) + 8; |
| 5390 | eh_advance<big_endian>(fde, off - last_eh_loc); |
| 5391 | fde.resize(fde.size() + 6); |
| 5392 | unsigned char* p = &*fde.end() - 6; |
| 5393 | *p++ = elfcpp::DW_CFA_register; |
| 5394 | *p++ = 65; |
| 5395 | *p++ = 12; |
| 5396 | *p++ = elfcpp::DW_CFA_advance_loc + 8 / 4; |
| 5397 | *p++ = elfcpp::DW_CFA_restore_extended; |
| 5398 | *p++ = 65; |
| 5399 | last_eh_loc = off + 8; |
| 5400 | } |
| 5401 | |
| 5402 | for (unsigned int i = 0; i < branches.size(); i++) |
| 5403 | { |
| 5404 | branch_iter bs = branches[i]; |
| 5405 | unsigned int off = bs->second.off_ + 8; |
| 5406 | eh_advance<big_endian>(fde, off - last_eh_loc); |
| 5407 | fde.resize(fde.size() + 6); |
| 5408 | unsigned char* p = &*fde.end() - 6; |
| 5409 | *p++ = elfcpp::DW_CFA_register; |
| 5410 | *p++ = 65; |
| 5411 | *p++ = 12; |
| 5412 | *p++ = elfcpp::DW_CFA_advance_loc + 8 / 4; |
| 5413 | *p++ = elfcpp::DW_CFA_restore_extended; |
| 5414 | *p++ = 65; |
| 5415 | last_eh_loc = off + 8; |
| 5416 | } |
| 5417 | |
| 5418 | layout->add_eh_frame_for_plt(this, |
| 5419 | Eh_cie<size>::eh_frame_cie, |
| 5420 | sizeof (Eh_cie<size>::eh_frame_cie), |
| 5421 | &*fde.begin(), fde.size()); |
| 5422 | } |
| 5423 | |
| 5424 | template<int size, bool big_endian> |
| 5425 | void |
| 5426 | Stub_table<size, big_endian>::remove_eh_frame(Layout* layout) |
| 5427 | { |
| 5428 | if (size == 64 |
| 5429 | && parameters->options().ld_generated_unwind_info() |
| 5430 | && this->targ_->has_glink()) |
| 5431 | layout->remove_eh_frame_for_plt(this, |
| 5432 | Eh_cie<size>::eh_frame_cie, |
| 5433 | sizeof (Eh_cie<size>::eh_frame_cie)); |
| 5434 | } |
| 5435 | |
| 5436 | // A class to handle .glink. |
| 5437 | |
| 5438 | template<int size, bool big_endian> |
| 5439 | class Output_data_glink : public Output_section_data |
| 5440 | { |
| 5441 | public: |
| 5442 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 5443 | static const Address invalid_address = static_cast<Address>(0) - 1; |
| 5444 | |
| 5445 | Output_data_glink(Target_powerpc<size, big_endian>* targ) |
| 5446 | : Output_section_data(16), targ_(targ), global_entry_stubs_(), |
| 5447 | end_branch_table_(), ge_size_(0) |
| 5448 | { } |
| 5449 | |
| 5450 | void |
| 5451 | add_eh_frame(Layout* layout); |
| 5452 | |
| 5453 | void |
| 5454 | add_global_entry(const Symbol*); |
| 5455 | |
| 5456 | Address |
| 5457 | find_global_entry(const Symbol*) const; |
| 5458 | |
| 5459 | unsigned int |
| 5460 | global_entry_align(unsigned int off) const |
| 5461 | { |
| 5462 | unsigned int align = param_plt_align<size>(); |
| 5463 | return (off + align - 1) & -align; |
| 5464 | } |
| 5465 | |
| 5466 | unsigned int |
| 5467 | global_entry_off() const |
| 5468 | { |
| 5469 | return this->global_entry_align(this->end_branch_table_); |
| 5470 | } |
| 5471 | |
| 5472 | Address |
| 5473 | global_entry_address() const |
| 5474 | { |
| 5475 | gold_assert(this->is_data_size_valid()); |
| 5476 | return this->address() + this->global_entry_off(); |
| 5477 | } |
| 5478 | |
| 5479 | int |
| 5480 | pltresolve_size() const |
| 5481 | { |
| 5482 | if (size == 64) |
| 5483 | return (8 |
| 5484 | + (this->targ_->abiversion() < 2 ? 11 * 4 : 14 * 4)); |
| 5485 | return 16 * 4; |
| 5486 | } |
| 5487 | |
| 5488 | protected: |
| 5489 | // Write to a map file. |
| 5490 | void |
| 5491 | do_print_to_mapfile(Mapfile* mapfile) const |
| 5492 | { mapfile->print_output_data(this, _("** glink")); } |
| 5493 | |
| 5494 | private: |
| 5495 | void |
| 5496 | set_final_data_size(); |
| 5497 | |
| 5498 | // Write out .glink |
| 5499 | void |
| 5500 | do_write(Output_file*); |
| 5501 | |
| 5502 | // Allows access to .got and .plt for do_write. |
| 5503 | Target_powerpc<size, big_endian>* targ_; |
| 5504 | |
| 5505 | // Map sym to stub offset. |
| 5506 | typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries; |
| 5507 | Global_entry_stub_entries global_entry_stubs_; |
| 5508 | |
| 5509 | unsigned int end_branch_table_, ge_size_; |
| 5510 | }; |
| 5511 | |
| 5512 | template<int size, bool big_endian> |
| 5513 | void |
| 5514 | Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout) |
| 5515 | { |
| 5516 | if (!parameters->options().ld_generated_unwind_info()) |
| 5517 | return; |
| 5518 | |
| 5519 | if (size == 64) |
| 5520 | { |
| 5521 | if (this->targ_->abiversion() < 2) |
| 5522 | layout->add_eh_frame_for_plt(this, |
| 5523 | Eh_cie<64>::eh_frame_cie, |
| 5524 | sizeof (Eh_cie<64>::eh_frame_cie), |
| 5525 | glink_eh_frame_fde_64v1, |
| 5526 | sizeof (glink_eh_frame_fde_64v1)); |
| 5527 | else |
| 5528 | layout->add_eh_frame_for_plt(this, |
| 5529 | Eh_cie<64>::eh_frame_cie, |
| 5530 | sizeof (Eh_cie<64>::eh_frame_cie), |
| 5531 | glink_eh_frame_fde_64v2, |
| 5532 | sizeof (glink_eh_frame_fde_64v2)); |
| 5533 | } |
| 5534 | else |
| 5535 | { |
| 5536 | // 32-bit .glink can use the default since the CIE return |
| 5537 | // address reg, LR, is valid. |
| 5538 | layout->add_eh_frame_for_plt(this, |
| 5539 | Eh_cie<32>::eh_frame_cie, |
| 5540 | sizeof (Eh_cie<32>::eh_frame_cie), |
| 5541 | default_fde, |
| 5542 | sizeof (default_fde)); |
| 5543 | // Except where LR is used in a PIC __glink_PLTresolve. |
| 5544 | if (parameters->options().output_is_position_independent()) |
| 5545 | layout->add_eh_frame_for_plt(this, |
| 5546 | Eh_cie<32>::eh_frame_cie, |
| 5547 | sizeof (Eh_cie<32>::eh_frame_cie), |
| 5548 | glink_eh_frame_fde_32, |
| 5549 | sizeof (glink_eh_frame_fde_32)); |
| 5550 | } |
| 5551 | } |
| 5552 | |
| 5553 | template<int size, bool big_endian> |
| 5554 | void |
| 5555 | Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym) |
| 5556 | { |
| 5557 | unsigned int off = this->global_entry_align(this->ge_size_); |
| 5558 | std::pair<typename Global_entry_stub_entries::iterator, bool> p |
| 5559 | = this->global_entry_stubs_.insert(std::make_pair(gsym, off)); |
| 5560 | if (p.second) |
| 5561 | this->ge_size_ = off + 16; |
| 5562 | } |
| 5563 | |
| 5564 | template<int size, bool big_endian> |
| 5565 | typename Output_data_glink<size, big_endian>::Address |
| 5566 | Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const |
| 5567 | { |
| 5568 | typename Global_entry_stub_entries::const_iterator p |
| 5569 | = this->global_entry_stubs_.find(gsym); |
| 5570 | return p == this->global_entry_stubs_.end() ? invalid_address : p->second; |
| 5571 | } |
| 5572 | |
| 5573 | template<int size, bool big_endian> |
| 5574 | void |
| 5575 | Output_data_glink<size, big_endian>::set_final_data_size() |
| 5576 | { |
| 5577 | unsigned int count = this->targ_->plt_entry_count(); |
| 5578 | section_size_type total = 0; |
| 5579 | |
| 5580 | if (count != 0) |
| 5581 | { |
| 5582 | if (size == 32) |
| 5583 | { |
| 5584 | // space for branch table |
| 5585 | total += 4 * (count - 1); |
| 5586 | |
| 5587 | total += -total & 15; |
| 5588 | total += this->pltresolve_size(); |
| 5589 | } |
| 5590 | else |
| 5591 | { |
| 5592 | total += this->pltresolve_size(); |
| 5593 | |
| 5594 | // space for branch table |
| 5595 | total += 4 * count; |
| 5596 | if (this->targ_->abiversion() < 2) |
| 5597 | { |
| 5598 | total += 4 * count; |
| 5599 | if (count > 0x8000) |
| 5600 | total += 4 * (count - 0x8000); |
| 5601 | } |
| 5602 | } |
| 5603 | } |
| 5604 | this->end_branch_table_ = total; |
| 5605 | total = this->global_entry_align(total); |
| 5606 | total += this->ge_size_; |
| 5607 | |
| 5608 | this->set_data_size(total); |
| 5609 | } |
| 5610 | |
| 5611 | // Define symbols on stubs, identifying the stub. |
| 5612 | |
| 5613 | template<int size, bool big_endian> |
| 5614 | void |
| 5615 | Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab) |
| 5616 | { |
| 5617 | if (!this->plt_call_stubs_.empty()) |
| 5618 | { |
| 5619 | // The key for the plt call stub hash table includes addresses, |
| 5620 | // therefore traversal order depends on those addresses, which |
| 5621 | // can change between runs if gold is a PIE. Unfortunately the |
| 5622 | // output .symtab ordering depends on the order in which symbols |
| 5623 | // are added to the linker symtab. We want reproducible output |
| 5624 | // so must sort the call stub symbols. |
| 5625 | typedef typename Plt_stub_entries::const_iterator plt_iter; |
| 5626 | std::vector<plt_iter> sorted; |
| 5627 | sorted.resize(this->plt_call_stubs_.size()); |
| 5628 | |
| 5629 | for (plt_iter cs = this->plt_call_stubs_.begin(); |
| 5630 | cs != this->plt_call_stubs_.end(); |
| 5631 | ++cs) |
| 5632 | sorted[cs->second.indx_] = cs; |
| 5633 | |
| 5634 | for (unsigned int i = 0; i < this->plt_call_stubs_.size(); ++i) |
| 5635 | { |
| 5636 | plt_iter cs = sorted[i]; |
| 5637 | char add[10]; |
| 5638 | add[0] = 0; |
| 5639 | if (cs->first.addend_ != 0) |
| 5640 | sprintf(add, "+%x", static_cast<uint32_t>(cs->first.addend_)); |
| 5641 | char obj[10]; |
| 5642 | obj[0] = 0; |
| 5643 | if (cs->first.object_) |
| 5644 | { |
| 5645 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
| 5646 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); |
| 5647 | sprintf(obj, "%x:", ppcobj->uniq()); |
| 5648 | } |
| 5649 | char localname[9]; |
| 5650 | const char *symname; |
| 5651 | if (cs->first.sym_ == NULL) |
| 5652 | { |
| 5653 | sprintf(localname, "%x", cs->first.locsym_); |
| 5654 | symname = localname; |
| 5655 | } |
| 5656 | else if (this->targ_->is_tls_get_addr_opt(cs->first.sym_)) |
| 5657 | symname = this->targ_->tls_get_addr_opt()->name(); |
| 5658 | else |
| 5659 | symname = cs->first.sym_->name(); |
| 5660 | char* name = new char[8 + 10 + strlen(obj) + strlen(symname) + strlen(add) + 1]; |
| 5661 | sprintf(name, "%08x.plt_call.%s%s%s", this->uniq_, obj, symname, add); |
| 5662 | Address value |
| 5663 | = this->stub_address() - this->address() + cs->second.off_; |
| 5664 | unsigned int stub_size = this->plt_call_align(this->plt_call_size(cs)); |
| 5665 | this->targ_->define_local(symtab, name, this, value, stub_size); |
| 5666 | } |
| 5667 | } |
| 5668 | |
| 5669 | typedef typename Branch_stub_entries::const_iterator branch_iter; |
| 5670 | for (branch_iter bs = this->long_branch_stubs_.begin(); |
| 5671 | bs != this->long_branch_stubs_.end(); |
| 5672 | ++bs) |
| 5673 | { |
| 5674 | if (bs->second.save_res_) |
| 5675 | continue; |
| 5676 | |
| 5677 | char* name = new char[8 + 13 + 16 + 1]; |
| 5678 | sprintf(name, "%08x.long_branch.%llx", this->uniq_, |
| 5679 | static_cast<unsigned long long>(bs->first.dest_)); |
| 5680 | Address value = (this->stub_address() - this->address() |
| 5681 | + this->plt_size_ + bs->second.off_); |
| 5682 | bool need_lt = false; |
| 5683 | unsigned int stub_size = this->branch_stub_size(bs, &need_lt); |
| 5684 | this->targ_->define_local(symtab, name, this, value, stub_size); |
| 5685 | } |
| 5686 | } |
| 5687 | |
| 5688 | // Emit the start of a __tls_get_addr_opt plt call stub. |
| 5689 | |
| 5690 | template<int size, bool big_endian> |
| 5691 | bool |
| 5692 | Stub_table<size, big_endian>::build_tls_opt_head( |
| 5693 | unsigned char** pp, |
| 5694 | typename Plt_stub_entries::const_iterator cs) |
| 5695 | { |
| 5696 | if (this->targ_->is_tls_get_addr_opt(cs->first.sym_)) |
| 5697 | { |
| 5698 | unsigned char* p = *pp; |
| 5699 | if (size == 64) |
| 5700 | { |
| 5701 | write_insn<big_endian>(p, ld_11_3 + 0); |
| 5702 | p += 4; |
| 5703 | write_insn<big_endian>(p, ld_12_3 + 8); |
| 5704 | p += 4; |
| 5705 | write_insn<big_endian>(p, mr_0_3); |
| 5706 | p += 4; |
| 5707 | write_insn<big_endian>(p, cmpdi_11_0); |
| 5708 | p += 4; |
| 5709 | write_insn<big_endian>(p, add_3_12_13); |
| 5710 | p += 4; |
| 5711 | write_insn<big_endian>(p, beqlr); |
| 5712 | p += 4; |
| 5713 | write_insn<big_endian>(p, mr_3_0); |
| 5714 | p += 4; |
| 5715 | if (cs->second.r2save_ && !cs->second.localentry0_) |
| 5716 | { |
| 5717 | write_insn<big_endian>(p, mflr_11); |
| 5718 | p += 4; |
| 5719 | write_insn<big_endian>(p, (std_11_1 + this->targ_->stk_linker())); |
| 5720 | p += 4; |
| 5721 | } |
| 5722 | } |
| 5723 | else |
| 5724 | { |
| 5725 | write_insn<big_endian>(p, lwz_11_3 + 0); |
| 5726 | p += 4; |
| 5727 | write_insn<big_endian>(p, lwz_12_3 + 4); |
| 5728 | p += 4; |
| 5729 | write_insn<big_endian>(p, mr_0_3); |
| 5730 | p += 4; |
| 5731 | write_insn<big_endian>(p, cmpwi_11_0); |
| 5732 | p += 4; |
| 5733 | write_insn<big_endian>(p, add_3_12_2); |
| 5734 | p += 4; |
| 5735 | write_insn<big_endian>(p, beqlr); |
| 5736 | p += 4; |
| 5737 | write_insn<big_endian>(p, mr_3_0); |
| 5738 | p += 4; |
| 5739 | write_insn<big_endian>(p, nop); |
| 5740 | p += 4; |
| 5741 | } |
| 5742 | *pp = p; |
| 5743 | return true; |
| 5744 | } |
| 5745 | return false; |
| 5746 | } |
| 5747 | |
| 5748 | // Emit the tail of a __tls_get_addr_opt plt call stub. |
| 5749 | |
| 5750 | template<int size, bool big_endian> |
| 5751 | bool |
| 5752 | Stub_table<size, big_endian>::build_tls_opt_tail( |
| 5753 | unsigned char* p, |
| 5754 | typename Plt_stub_entries::const_iterator cs) |
| 5755 | { |
| 5756 | if (size == 64 |
| 5757 | && cs->second.r2save_ |
| 5758 | && !cs->second.localentry0_ |
| 5759 | && this->targ_->is_tls_get_addr_opt(cs->first.sym_)) |
| 5760 | { |
| 5761 | write_insn<big_endian>(p, bctrl); |
| 5762 | p += 4; |
| 5763 | write_insn<big_endian>(p, ld_2_1 + this->targ_->stk_toc()); |
| 5764 | p += 4; |
| 5765 | write_insn<big_endian>(p, ld_11_1 + this->targ_->stk_linker()); |
| 5766 | p += 4; |
| 5767 | write_insn<big_endian>(p, mtlr_11); |
| 5768 | p += 4; |
| 5769 | write_insn<big_endian>(p, blr); |
| 5770 | return true; |
| 5771 | } |
| 5772 | return false; |
| 5773 | } |
| 5774 | |
| 5775 | // Emit pc-relative plt call stub code. |
| 5776 | |
| 5777 | template<bool big_endian> |
| 5778 | static unsigned char* |
| 5779 | build_powerxx_offset(unsigned char* p, uint64_t off, uint64_t odd, bool load) |
| 5780 | { |
| 5781 | uint64_t insn; |
| 5782 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
| 5783 | { |
| 5784 | off -= odd; |
| 5785 | if (odd) |
| 5786 | { |
| 5787 | write_insn<big_endian>(p, nop); |
| 5788 | p += 4; |
| 5789 | } |
| 5790 | if (load) |
| 5791 | insn = pld_12_pc; |
| 5792 | else |
| 5793 | insn = paddi_12_pc; |
| 5794 | insn |= d34(off); |
| 5795 | write_insn<big_endian>(p, insn >> 32); |
| 5796 | p += 4; |
| 5797 | write_insn<big_endian>(p, insn & 0xffffffff); |
| 5798 | } |
| 5799 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
| 5800 | { |
| 5801 | off -= 8 - odd; |
| 5802 | write_insn<big_endian>(p, li_11_0 | (ha34(off) & 0xffff)); |
| 5803 | p += 4; |
| 5804 | if (!odd) |
| 5805 | { |
| 5806 | write_insn<big_endian>(p, sldi_11_11_34); |
| 5807 | p += 4; |
| 5808 | } |
| 5809 | insn = paddi_12_pc | d34(off); |
| 5810 | write_insn<big_endian>(p, insn >> 32); |
| 5811 | p += 4; |
| 5812 | write_insn<big_endian>(p, insn & 0xffffffff); |
| 5813 | p += 4; |
| 5814 | if (odd) |
| 5815 | { |
| 5816 | write_insn<big_endian>(p, sldi_11_11_34); |
| 5817 | p += 4; |
| 5818 | } |
| 5819 | if (load) |
| 5820 | write_insn<big_endian>(p, ldx_12_11_12); |
| 5821 | else |
| 5822 | write_insn<big_endian>(p, add_12_11_12); |
| 5823 | } |
| 5824 | else |
| 5825 | { |
| 5826 | off -= odd + 8; |
| 5827 | write_insn<big_endian>(p, lis_11 | ((ha34(off) >> 16) & 0x3fff)); |
| 5828 | p += 4; |
| 5829 | write_insn<big_endian>(p, ori_11_11_0 | (ha34(off) & 0xffff)); |
| 5830 | p += 4; |
| 5831 | if (odd) |
| 5832 | { |
| 5833 | write_insn<big_endian>(p, sldi_11_11_34); |
| 5834 | p += 4; |
| 5835 | } |
| 5836 | insn = paddi_12_pc | d34(off); |
| 5837 | write_insn<big_endian>(p, insn >> 32); |
| 5838 | p += 4; |
| 5839 | write_insn<big_endian>(p, insn & 0xffffffff); |
| 5840 | p += 4; |
| 5841 | if (!odd) |
| 5842 | { |
| 5843 | write_insn<big_endian>(p, sldi_11_11_34); |
| 5844 | p += 4; |
| 5845 | } |
| 5846 | if (load) |
| 5847 | write_insn<big_endian>(p, ldx_12_11_12); |
| 5848 | else |
| 5849 | write_insn<big_endian>(p, add_12_11_12); |
| 5850 | } |
| 5851 | p += 4; |
| 5852 | return p; |
| 5853 | } |
| 5854 | |
| 5855 | // Gets the address of a label (1:) in r11 and builds an offset in r12, |
| 5856 | // then adds it to r11 (LOAD false) or loads r12 from r11+r12 (LOAD true). |
| 5857 | // mflr %r12 |
| 5858 | // bcl 20,31,1f |
| 5859 | // 1: mflr %r11 |
| 5860 | // mtlr %r12 |
| 5861 | // lis %r12,xxx-1b@highest |
| 5862 | // ori %r12,%r12,xxx-1b@higher |
| 5863 | // sldi %r12,%r12,32 |
| 5864 | // oris %r12,%r12,xxx-1b@high |
| 5865 | // ori %r12,%r12,xxx-1b@l |
| 5866 | // add/ldx %r12,%r11,%r12 |
| 5867 | |
| 5868 | template<bool big_endian> |
| 5869 | static unsigned char* |
| 5870 | build_notoc_offset(unsigned char* p, uint64_t off, bool load) |
| 5871 | { |
| 5872 | write_insn<big_endian>(p, mflr_12); |
| 5873 | p += 4; |
| 5874 | write_insn<big_endian>(p, bcl_20_31); |
| 5875 | p += 4; |
| 5876 | write_insn<big_endian>(p, mflr_11); |
| 5877 | p += 4; |
| 5878 | write_insn<big_endian>(p, mtlr_12); |
| 5879 | p += 4; |
| 5880 | if (off + 0x8000 < 0x10000) |
| 5881 | { |
| 5882 | if (load) |
| 5883 | write_insn<big_endian>(p, ld_12_11 + l(off)); |
| 5884 | else |
| 5885 | write_insn<big_endian>(p, addi_12_11 + l(off)); |
| 5886 | } |
| 5887 | else if (off + 0x80008000ULL < 0x100000000ULL) |
| 5888 | { |
| 5889 | write_insn<big_endian>(p, addis_12_11 + ha(off)); |
| 5890 | p += 4; |
| 5891 | if (load) |
| 5892 | write_insn<big_endian>(p, ld_12_12 + l(off)); |
| 5893 | else |
| 5894 | write_insn<big_endian>(p, addi_12_12 + l(off)); |
| 5895 | } |
| 5896 | else |
| 5897 | { |
| 5898 | if (off + 0x800000000000ULL < 0x1000000000000ULL) |
| 5899 | { |
| 5900 | write_insn<big_endian>(p, li_12_0 + ((off >> 32) & 0xffff)); |
| 5901 | p += 4; |
| 5902 | } |
| 5903 | else |
| 5904 | { |
| 5905 | write_insn<big_endian>(p, lis_12 + ((off >> 48) & 0xffff)); |
| 5906 | p += 4; |
| 5907 | if (((off >> 32) & 0xffff) != 0) |
| 5908 | { |
| 5909 | write_insn<big_endian>(p, ori_12_12_0 + ((off >> 32) & 0xffff)); |
| 5910 | p += 4; |
| 5911 | } |
| 5912 | } |
| 5913 | if (((off >> 32) & 0xffffffffULL) != 0) |
| 5914 | { |
| 5915 | write_insn<big_endian>(p, sldi_12_12_32); |
| 5916 | p += 4; |
| 5917 | } |
| 5918 | if (hi(off) != 0) |
| 5919 | { |
| 5920 | write_insn<big_endian>(p, oris_12_12_0 + hi(off)); |
| 5921 | p += 4; |
| 5922 | } |
| 5923 | if (l(off) != 0) |
| 5924 | { |
| 5925 | write_insn<big_endian>(p, ori_12_12_0 + l(off)); |
| 5926 | p += 4; |
| 5927 | } |
| 5928 | if (load) |
| 5929 | write_insn<big_endian>(p, ldx_12_11_12); |
| 5930 | else |
| 5931 | write_insn<big_endian>(p, add_12_11_12); |
| 5932 | } |
| 5933 | p += 4; |
| 5934 | return p; |
| 5935 | } |
| 5936 | |
| 5937 | // Size of a given plt call stub. |
| 5938 | |
| 5939 | template<int size, bool big_endian> |
| 5940 | unsigned int |
| 5941 | Stub_table<size, big_endian>::plt_call_size( |
| 5942 | typename Plt_stub_entries::const_iterator p) const |
| 5943 | { |
| 5944 | if (size == 32) |
| 5945 | { |
| 5946 | const Symbol* gsym = p->first.sym_; |
| 5947 | return (4 * 4 |
| 5948 | + (this->targ_->is_tls_get_addr_opt(gsym) ? 8 * 4 : 0)); |
| 5949 | } |
| 5950 | |
| 5951 | const Output_data_plt_powerpc<size, big_endian>* plt; |
| 5952 | uint64_t plt_addr = this->plt_off(p, &plt); |
| 5953 | plt_addr += plt->address(); |
| 5954 | unsigned int bytes = 0; |
| 5955 | const Symbol* gsym = p->first.sym_; |
| 5956 | if (this->targ_->is_tls_get_addr_opt(gsym)) |
| 5957 | { |
| 5958 | if (p->second.r2save_ && !p->second.localentry0_) |
| 5959 | bytes = 13 * 4; |
| 5960 | else |
| 5961 | bytes = 7 * 4; |
| 5962 | } |
| 5963 | |
| 5964 | if (p->second.r2save_) |
| 5965 | bytes += 4; |
| 5966 | |
| 5967 | if (this->targ_->powerxx_stubs()) |
| 5968 | { |
| 5969 | uint64_t from = this->stub_address() + p->second.off_ + bytes; |
| 5970 | if (bytes > 8 * 4) |
| 5971 | from -= 4 * 4; |
| 5972 | uint64_t odd = from & 4; |
| 5973 | uint64_t off = plt_addr - from; |
| 5974 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
| 5975 | bytes += odd + 4 * 4; |
| 5976 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
| 5977 | bytes += 7 * 4; |
| 5978 | else |
| 5979 | bytes += 8 * 4; |
| 5980 | return bytes; |
| 5981 | } |
| 5982 | |
| 5983 | if (p->second.notoc_) |
| 5984 | { |
| 5985 | uint64_t from = this->stub_address() + p->second.off_ + bytes + 2 * 4; |
| 5986 | if (bytes > 32) |
| 5987 | from -= 4 * 4; |
| 5988 | uint64_t off = plt_addr - from; |
| 5989 | if (off + 0x8000 < 0x10000) |
| 5990 | bytes += 7 * 4; |
| 5991 | else if (off + 0x80008000ULL < 0x100000000ULL) |
| 5992 | bytes += 8 * 4; |
| 5993 | else |
| 5994 | { |
| 5995 | bytes += 8 * 4; |
| 5996 | if (off + 0x800000000000ULL >= 0x1000000000000ULL |
| 5997 | && ((off >> 32) & 0xffff) != 0) |
| 5998 | bytes += 4; |
| 5999 | if (((off >> 32) & 0xffffffffULL) != 0) |
| 6000 | bytes += 4; |
| 6001 | if (hi(off) != 0) |
| 6002 | bytes += 4; |
| 6003 | if (l(off) != 0) |
| 6004 | bytes += 4; |
| 6005 | } |
| 6006 | return bytes; |
| 6007 | } |
| 6008 | |
| 6009 | uint64_t got_addr = this->targ_->got_section()->output_section()->address(); |
| 6010 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
| 6011 | <const Powerpc_relobj<size, big_endian>*>(p->first.object_); |
| 6012 | got_addr += ppcobj->toc_base_offset(); |
| 6013 | uint64_t off = plt_addr - got_addr; |
| 6014 | bytes += 3 * 4 + 4 * (ha(off) != 0); |
| 6015 | if (this->targ_->abiversion() < 2) |
| 6016 | { |
| 6017 | bool static_chain = parameters->options().plt_static_chain(); |
| 6018 | bool thread_safe = this->targ_->plt_thread_safe(); |
| 6019 | bytes += (4 |
| 6020 | + 4 * static_chain |
| 6021 | + 8 * thread_safe |
| 6022 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))); |
| 6023 | } |
| 6024 | return bytes; |
| 6025 | } |
| 6026 | |
| 6027 | // Return long branch stub size. |
| 6028 | |
| 6029 | template<int size, bool big_endian> |
| 6030 | unsigned int |
| 6031 | Stub_table<size, big_endian>::branch_stub_size( |
| 6032 | typename Branch_stub_entries::const_iterator p, |
| 6033 | bool* need_lt) |
| 6034 | { |
| 6035 | Address loc = this->stub_address() + this->last_plt_size_ + p->second.off_; |
| 6036 | if (size == 32) |
| 6037 | { |
| 6038 | if (p->first.dest_ - loc + (1 << 25) < 2 << 25) |
| 6039 | return 4; |
| 6040 | if (parameters->options().output_is_position_independent()) |
| 6041 | return 32; |
| 6042 | return 16; |
| 6043 | } |
| 6044 | |
| 6045 | uint64_t off = p->first.dest_ - loc; |
| 6046 | if (p->second.notoc_) |
| 6047 | { |
| 6048 | if (this->targ_->powerxx_stubs()) |
| 6049 | { |
| 6050 | Address odd = loc & 4; |
| 6051 | if (off + (1 << 25) < 2 << 25) |
| 6052 | return odd + 12; |
| 6053 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
| 6054 | return odd + 16; |
| 6055 | if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
| 6056 | return 28; |
| 6057 | return 32; |
| 6058 | } |
| 6059 | off -= 8; |
| 6060 | if (off + 0x8000 < 0x10000) |
| 6061 | return 24; |
| 6062 | if (off + 0x80008000ULL < 0x100000000ULL) |
| 6063 | { |
| 6064 | if (off + 24 + (1 << 25) < 2 << 25) |
| 6065 | return 28; |
| 6066 | return 32; |
| 6067 | } |
| 6068 | unsigned int bytes = 32; |
| 6069 | if (off + 0x800000000000ULL >= 0x1000000000000ULL |
| 6070 | && ((off >> 32) & 0xffff) != 0) |
| 6071 | bytes += 4; |
| 6072 | if (((off >> 32) & 0xffffffffULL) != 0) |
| 6073 | bytes += 4; |
| 6074 | if (hi(off) != 0) |
| 6075 | bytes += 4; |
| 6076 | if (l(off) != 0) |
| 6077 | bytes += 4; |
| 6078 | return bytes; |
| 6079 | } |
| 6080 | |
| 6081 | if (off + (1 << 25) < 2 << 25) |
| 6082 | return 4; |
| 6083 | if (!this->targ_->powerxx_stubs()) |
| 6084 | *need_lt = true; |
| 6085 | return 16; |
| 6086 | } |
| 6087 | |
| 6088 | template<int size, bool big_endian> |
| 6089 | void |
| 6090 | Stub_table<size, big_endian>::plt_error(const Plt_stub_key& p) |
| 6091 | { |
| 6092 | if (p.sym_) |
| 6093 | gold_error(_("linkage table error against `%s'"), |
| 6094 | p.sym_->demangled_name().c_str()); |
| 6095 | else |
| 6096 | gold_error(_("linkage table error against `%s:[local %u]'"), |
| 6097 | p.object_->name().c_str(), |
| 6098 | p.locsym_); |
| 6099 | } |
| 6100 | |
| 6101 | // Write out plt and long branch stub code. |
| 6102 | |
| 6103 | template<int size, bool big_endian> |
| 6104 | void |
| 6105 | Stub_table<size, big_endian>::do_write(Output_file* of) |
| 6106 | { |
| 6107 | if (this->plt_call_stubs_.empty() |
| 6108 | && this->long_branch_stubs_.empty()) |
| 6109 | return; |
| 6110 | |
| 6111 | const section_size_type start_off = this->offset(); |
| 6112 | const section_size_type off = this->stub_offset(); |
| 6113 | const section_size_type oview_size = |
| 6114 | convert_to_section_size_type(this->data_size() - (off - start_off)); |
| 6115 | unsigned char* const oview = of->get_output_view(off, oview_size); |
| 6116 | unsigned char* p; |
| 6117 | |
| 6118 | if (size == 64 |
| 6119 | && this->targ_->powerxx_stubs()) |
| 6120 | { |
| 6121 | if (!this->plt_call_stubs_.empty()) |
| 6122 | { |
| 6123 | // Write out plt call stubs. |
| 6124 | typename Plt_stub_entries::const_iterator cs; |
| 6125 | for (cs = this->plt_call_stubs_.begin(); |
| 6126 | cs != this->plt_call_stubs_.end(); |
| 6127 | ++cs) |
| 6128 | { |
| 6129 | p = oview + cs->second.off_; |
| 6130 | this->build_tls_opt_head(&p, cs); |
| 6131 | if (cs->second.r2save_) |
| 6132 | { |
| 6133 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
| 6134 | p += 4; |
| 6135 | } |
| 6136 | const Output_data_plt_powerpc<size, big_endian>* plt; |
| 6137 | Address pltoff = this->plt_off(cs, &plt); |
| 6138 | Address plt_addr = pltoff + plt->address(); |
| 6139 | Address from = this->stub_address() + (p - oview); |
| 6140 | Address delta = plt_addr - from; |
| 6141 | p = build_powerxx_offset<big_endian>(p, delta, from & 4, true); |
| 6142 | write_insn<big_endian>(p, mtctr_12); |
| 6143 | p += 4; |
| 6144 | if (!this->build_tls_opt_tail(p, cs)) |
| 6145 | write_insn<big_endian>(p, bctr); |
| 6146 | } |
| 6147 | } |
| 6148 | |
| 6149 | // Write out long branch stubs. |
| 6150 | typename Branch_stub_entries::const_iterator bs; |
| 6151 | for (bs = this->long_branch_stubs_.begin(); |
| 6152 | bs != this->long_branch_stubs_.end(); |
| 6153 | ++bs) |
| 6154 | { |
| 6155 | if (bs->second.save_res_) |
| 6156 | continue; |
| 6157 | Address off = this->plt_size_ + bs->second.off_; |
| 6158 | p = oview + off; |
| 6159 | Address loc = this->stub_address() + off; |
| 6160 | Address delta = bs->first.dest_ - loc; |
| 6161 | if (bs->second.notoc_ || delta + (1 << 25) >= 2 << 25) |
| 6162 | { |
| 6163 | unsigned char* startp = p; |
| 6164 | p = build_powerxx_offset<big_endian>(p, delta, loc & 4, false); |
| 6165 | delta -= p - startp; |
| 6166 | } |
| 6167 | if (delta + (1 << 25) < 2 << 25) |
| 6168 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); |
| 6169 | else |
| 6170 | { |
| 6171 | write_insn<big_endian>(p, mtctr_12); |
| 6172 | p += 4; |
| 6173 | write_insn<big_endian>(p, bctr); |
| 6174 | } |
| 6175 | } |
| 6176 | } |
| 6177 | else if (size == 64) |
| 6178 | { |
| 6179 | const Output_data_got_powerpc<size, big_endian>* got |
| 6180 | = this->targ_->got_section(); |
| 6181 | Address got_os_addr = got->output_section()->address(); |
| 6182 | |
| 6183 | if (!this->plt_call_stubs_.empty() |
| 6184 | && this->targ_->abiversion() >= 2) |
| 6185 | { |
| 6186 | // Write out plt call stubs for ELFv2. |
| 6187 | typename Plt_stub_entries::const_iterator cs; |
| 6188 | for (cs = this->plt_call_stubs_.begin(); |
| 6189 | cs != this->plt_call_stubs_.end(); |
| 6190 | ++cs) |
| 6191 | { |
| 6192 | const Output_data_plt_powerpc<size, big_endian>* plt; |
| 6193 | Address pltoff = this->plt_off(cs, &plt); |
| 6194 | Address plt_addr = pltoff + plt->address(); |
| 6195 | |
| 6196 | p = oview + cs->second.off_; |
| 6197 | this->build_tls_opt_head(&p, cs); |
| 6198 | if (cs->second.r2save_) |
| 6199 | { |
| 6200 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
| 6201 | p += 4; |
| 6202 | } |
| 6203 | if (cs->second.notoc_) |
| 6204 | { |
| 6205 | Address from = this->stub_address() + (p - oview) + 8; |
| 6206 | Address off = plt_addr - from; |
| 6207 | p = build_notoc_offset<big_endian>(p, off, true); |
| 6208 | } |
| 6209 | else |
| 6210 | { |
| 6211 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
| 6212 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); |
| 6213 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); |
| 6214 | Address off = plt_addr - got_addr; |
| 6215 | |
| 6216 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
| 6217 | this->plt_error(cs->first); |
| 6218 | |
| 6219 | if (ha(off) != 0) |
| 6220 | { |
| 6221 | write_insn<big_endian>(p, addis_12_2 + ha(off)); |
| 6222 | p += 4; |
| 6223 | write_insn<big_endian>(p, ld_12_12 + l(off)); |
| 6224 | p += 4; |
| 6225 | } |
| 6226 | else |
| 6227 | { |
| 6228 | write_insn<big_endian>(p, ld_12_2 + l(off)); |
| 6229 | p += 4; |
| 6230 | } |
| 6231 | } |
| 6232 | write_insn<big_endian>(p, mtctr_12); |
| 6233 | p += 4; |
| 6234 | if (!this->build_tls_opt_tail(p, cs)) |
| 6235 | write_insn<big_endian>(p, bctr); |
| 6236 | } |
| 6237 | } |
| 6238 | else if (!this->plt_call_stubs_.empty()) |
| 6239 | { |
| 6240 | // Write out plt call stubs for ELFv1. |
| 6241 | typename Plt_stub_entries::const_iterator cs; |
| 6242 | for (cs = this->plt_call_stubs_.begin(); |
| 6243 | cs != this->plt_call_stubs_.end(); |
| 6244 | ++cs) |
| 6245 | { |
| 6246 | const Output_data_plt_powerpc<size, big_endian>* plt; |
| 6247 | Address pltoff = this->plt_off(cs, &plt); |
| 6248 | Address plt_addr = pltoff + plt->address(); |
| 6249 | const Powerpc_relobj<size, big_endian>* ppcobj = static_cast |
| 6250 | <const Powerpc_relobj<size, big_endian>*>(cs->first.object_); |
| 6251 | Address got_addr = got_os_addr + ppcobj->toc_base_offset(); |
| 6252 | Address off = plt_addr - got_addr; |
| 6253 | |
| 6254 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0 |
| 6255 | || cs->second.notoc_) |
| 6256 | this->plt_error(cs->first); |
| 6257 | |
| 6258 | bool static_chain = parameters->options().plt_static_chain(); |
| 6259 | bool thread_safe = this->targ_->plt_thread_safe(); |
| 6260 | bool use_fake_dep = false; |
| 6261 | Address cmp_branch_off = 0; |
| 6262 | if (thread_safe) |
| 6263 | { |
| 6264 | unsigned int pltindex |
| 6265 | = ((pltoff - this->targ_->first_plt_entry_offset()) |
| 6266 | / this->targ_->plt_entry_size()); |
| 6267 | Address glinkoff |
| 6268 | = (this->targ_->glink_section()->pltresolve_size() |
| 6269 | + pltindex * 8); |
| 6270 | if (pltindex > 32768) |
| 6271 | glinkoff += (pltindex - 32768) * 4; |
| 6272 | Address to |
| 6273 | = this->targ_->glink_section()->address() + glinkoff; |
| 6274 | Address from |
| 6275 | = (this->stub_address() + cs->second.off_ + 20 |
| 6276 | + 4 * cs->second.r2save_ |
| 6277 | + 4 * (ha(off) != 0) |
| 6278 | + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)) |
| 6279 | + 4 * static_chain); |
| 6280 | cmp_branch_off = to - from; |
| 6281 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); |
| 6282 | } |
| 6283 | |
| 6284 | p = oview + cs->second.off_; |
| 6285 | if (this->build_tls_opt_head(&p, cs)) |
| 6286 | use_fake_dep = thread_safe; |
| 6287 | if (cs->second.r2save_) |
| 6288 | { |
| 6289 | write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc()); |
| 6290 | p += 4; |
| 6291 | } |
| 6292 | if (ha(off) != 0) |
| 6293 | { |
| 6294 | write_insn<big_endian>(p, addis_11_2 + ha(off)); |
| 6295 | p += 4; |
| 6296 | write_insn<big_endian>(p, ld_12_11 + l(off)); |
| 6297 | p += 4; |
| 6298 | if (ha(off + 8 + 8 * static_chain) != ha(off)) |
| 6299 | { |
| 6300 | write_insn<big_endian>(p, addi_11_11 + l(off)); |
| 6301 | p += 4; |
| 6302 | off = 0; |
| 6303 | } |
| 6304 | write_insn<big_endian>(p, mtctr_12); |
| 6305 | p += 4; |
| 6306 | if (use_fake_dep) |
| 6307 | { |
| 6308 | write_insn<big_endian>(p, xor_2_12_12); |
| 6309 | p += 4; |
| 6310 | write_insn<big_endian>(p, add_11_11_2); |
| 6311 | p += 4; |
| 6312 | } |
| 6313 | write_insn<big_endian>(p, ld_2_11 + l(off + 8)); |
| 6314 | p += 4; |
| 6315 | if (static_chain) |
| 6316 | { |
| 6317 | write_insn<big_endian>(p, ld_11_11 + l(off + 16)); |
| 6318 | p += 4; |
| 6319 | } |
| 6320 | } |
| 6321 | else |
| 6322 | { |
| 6323 | write_insn<big_endian>(p, ld_12_2 + l(off)); |
| 6324 | p += 4; |
| 6325 | if (ha(off + 8 + 8 * static_chain) != ha(off)) |
| 6326 | { |
| 6327 | write_insn<big_endian>(p, addi_2_2 + l(off)); |
| 6328 | p += 4; |
| 6329 | off = 0; |
| 6330 | } |
| 6331 | write_insn<big_endian>(p, mtctr_12); |
| 6332 | p += 4; |
| 6333 | if (use_fake_dep) |
| 6334 | { |
| 6335 | write_insn<big_endian>(p, xor_11_12_12); |
| 6336 | p += 4; |
| 6337 | write_insn<big_endian>(p, add_2_2_11); |
| 6338 | p += 4; |
| 6339 | } |
| 6340 | if (static_chain) |
| 6341 | { |
| 6342 | write_insn<big_endian>(p, ld_11_2 + l(off + 16)); |
| 6343 | p += 4; |
| 6344 | } |
| 6345 | write_insn<big_endian>(p, ld_2_2 + l(off + 8)); |
| 6346 | p += 4; |
| 6347 | } |
| 6348 | if (this->build_tls_opt_tail(p, cs)) |
| 6349 | ; |
| 6350 | else if (thread_safe && !use_fake_dep) |
| 6351 | { |
| 6352 | write_insn<big_endian>(p, cmpldi_2_0); |
| 6353 | p += 4; |
| 6354 | write_insn<big_endian>(p, bnectr_p4); |
| 6355 | p += 4; |
| 6356 | write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc)); |
| 6357 | } |
| 6358 | else |
| 6359 | write_insn<big_endian>(p, bctr); |
| 6360 | } |
| 6361 | } |
| 6362 | |
| 6363 | // Write out long branch stubs. |
| 6364 | typename Branch_stub_entries::const_iterator bs; |
| 6365 | for (bs = this->long_branch_stubs_.begin(); |
| 6366 | bs != this->long_branch_stubs_.end(); |
| 6367 | ++bs) |
| 6368 | { |
| 6369 | if (bs->second.save_res_) |
| 6370 | continue; |
| 6371 | Address off = this->plt_size_ + bs->second.off_; |
| 6372 | p = oview + off; |
| 6373 | Address loc = this->stub_address() + off; |
| 6374 | Address delta = bs->first.dest_ - loc; |
| 6375 | if (bs->second.notoc_) |
| 6376 | { |
| 6377 | unsigned char* startp = p; |
| 6378 | p = build_notoc_offset<big_endian>(p, off, false); |
| 6379 | delta -= p - startp; |
| 6380 | } |
| 6381 | else if (delta + (1 << 25) >= 2 << 25) |
| 6382 | { |
| 6383 | Address brlt_addr |
| 6384 | = this->targ_->find_branch_lookup_table(bs->first.dest_); |
| 6385 | gold_assert(brlt_addr != invalid_address); |
| 6386 | brlt_addr += this->targ_->brlt_section()->address(); |
| 6387 | Address got_addr = got_os_addr + bs->first.toc_base_off_; |
| 6388 | Address brltoff = brlt_addr - got_addr; |
| 6389 | if (ha(brltoff) == 0) |
| 6390 | { |
| 6391 | write_insn<big_endian>(p, ld_12_2 + l(brltoff)); |
| 6392 | p += 4; |
| 6393 | } |
| 6394 | else |
| 6395 | { |
| 6396 | write_insn<big_endian>(p, addis_12_2 + ha(brltoff)); |
| 6397 | p += 4; |
| 6398 | write_insn<big_endian>(p, ld_12_12 + l(brltoff)); |
| 6399 | p += 4; |
| 6400 | } |
| 6401 | } |
| 6402 | if (delta + (1 << 25) < 2 << 25) |
| 6403 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); |
| 6404 | else |
| 6405 | { |
| 6406 | write_insn<big_endian>(p, mtctr_12); |
| 6407 | p += 4; |
| 6408 | write_insn<big_endian>(p, bctr); |
| 6409 | } |
| 6410 | } |
| 6411 | } |
| 6412 | else // size == 32 |
| 6413 | { |
| 6414 | if (!this->plt_call_stubs_.empty()) |
| 6415 | { |
| 6416 | // The address of _GLOBAL_OFFSET_TABLE_. |
| 6417 | Address g_o_t = invalid_address; |
| 6418 | |
| 6419 | // Write out plt call stubs. |
| 6420 | typename Plt_stub_entries::const_iterator cs; |
| 6421 | for (cs = this->plt_call_stubs_.begin(); |
| 6422 | cs != this->plt_call_stubs_.end(); |
| 6423 | ++cs) |
| 6424 | { |
| 6425 | const Output_data_plt_powerpc<size, big_endian>* plt; |
| 6426 | Address plt_addr = this->plt_off(cs, &plt); |
| 6427 | plt_addr += plt->address(); |
| 6428 | |
| 6429 | p = oview + cs->second.off_; |
| 6430 | this->build_tls_opt_head(&p, cs); |
| 6431 | if (parameters->options().output_is_position_independent()) |
| 6432 | { |
| 6433 | Address got_addr; |
| 6434 | const Powerpc_relobj<size, big_endian>* ppcobj |
| 6435 | = (static_cast<const Powerpc_relobj<size, big_endian>*> |
| 6436 | (cs->first.object_)); |
| 6437 | if (ppcobj != NULL && cs->first.addend_ >= 32768) |
| 6438 | { |
| 6439 | unsigned int got2 = ppcobj->got2_shndx(); |
| 6440 | got_addr = ppcobj->get_output_section_offset(got2); |
| 6441 | gold_assert(got_addr != invalid_address); |
| 6442 | got_addr += (ppcobj->output_section(got2)->address() |
| 6443 | + cs->first.addend_); |
| 6444 | } |
| 6445 | else |
| 6446 | { |
| 6447 | if (g_o_t == invalid_address) |
| 6448 | { |
| 6449 | const Output_data_got_powerpc<size, big_endian>* got |
| 6450 | = this->targ_->got_section(); |
| 6451 | g_o_t = got->address() + got->g_o_t(); |
| 6452 | } |
| 6453 | got_addr = g_o_t; |
| 6454 | } |
| 6455 | |
| 6456 | Address off = plt_addr - got_addr; |
| 6457 | if (ha(off) == 0) |
| 6458 | write_insn<big_endian>(p, lwz_11_30 + l(off)); |
| 6459 | else |
| 6460 | { |
| 6461 | write_insn<big_endian>(p, addis_11_30 + ha(off)); |
| 6462 | p += 4; |
| 6463 | write_insn<big_endian>(p, lwz_11_11 + l(off)); |
| 6464 | } |
| 6465 | } |
| 6466 | else |
| 6467 | { |
| 6468 | write_insn<big_endian>(p, lis_11 + ha(plt_addr)); |
| 6469 | p += 4; |
| 6470 | write_insn<big_endian>(p, lwz_11_11 + l(plt_addr)); |
| 6471 | } |
| 6472 | p += 4; |
| 6473 | write_insn<big_endian>(p, mtctr_11); |
| 6474 | p += 4; |
| 6475 | write_insn<big_endian>(p, bctr); |
| 6476 | } |
| 6477 | } |
| 6478 | |
| 6479 | // Write out long branch stubs. |
| 6480 | typename Branch_stub_entries::const_iterator bs; |
| 6481 | for (bs = this->long_branch_stubs_.begin(); |
| 6482 | bs != this->long_branch_stubs_.end(); |
| 6483 | ++bs) |
| 6484 | { |
| 6485 | if (bs->second.save_res_) |
| 6486 | continue; |
| 6487 | Address off = this->plt_size_ + bs->second.off_; |
| 6488 | p = oview + off; |
| 6489 | Address loc = this->stub_address() + off; |
| 6490 | Address delta = bs->first.dest_ - loc; |
| 6491 | if (delta + (1 << 25) < 2 << 25) |
| 6492 | write_insn<big_endian>(p, b | (delta & 0x3fffffc)); |
| 6493 | else if (!parameters->options().output_is_position_independent()) |
| 6494 | { |
| 6495 | write_insn<big_endian>(p, lis_12 + ha(bs->first.dest_)); |
| 6496 | p += 4; |
| 6497 | write_insn<big_endian>(p, addi_12_12 + l(bs->first.dest_)); |
| 6498 | } |
| 6499 | else |
| 6500 | { |
| 6501 | delta -= 8; |
| 6502 | write_insn<big_endian>(p, mflr_0); |
| 6503 | p += 4; |
| 6504 | write_insn<big_endian>(p, bcl_20_31); |
| 6505 | p += 4; |
| 6506 | write_insn<big_endian>(p, mflr_12); |
| 6507 | p += 4; |
| 6508 | write_insn<big_endian>(p, addis_12_12 + ha(delta)); |
| 6509 | p += 4; |
| 6510 | write_insn<big_endian>(p, addi_12_12 + l(delta)); |
| 6511 | p += 4; |
| 6512 | write_insn<big_endian>(p, mtlr_0); |
| 6513 | } |
| 6514 | p += 4; |
| 6515 | write_insn<big_endian>(p, mtctr_12); |
| 6516 | p += 4; |
| 6517 | write_insn<big_endian>(p, bctr); |
| 6518 | } |
| 6519 | } |
| 6520 | if (this->need_save_res_) |
| 6521 | { |
| 6522 | p = oview + this->plt_size_ + this->branch_size_; |
| 6523 | memcpy (p, this->targ_->savres_section()->contents(), |
| 6524 | this->targ_->savres_section()->data_size()); |
| 6525 | } |
| 6526 | } |
| 6527 | |
| 6528 | // Write out .glink. |
| 6529 | |
| 6530 | template<int size, bool big_endian> |
| 6531 | void |
| 6532 | Output_data_glink<size, big_endian>::do_write(Output_file* of) |
| 6533 | { |
| 6534 | const section_size_type off = this->offset(); |
| 6535 | const section_size_type oview_size = |
| 6536 | convert_to_section_size_type(this->data_size()); |
| 6537 | unsigned char* const oview = of->get_output_view(off, oview_size); |
| 6538 | unsigned char* p; |
| 6539 | |
| 6540 | // The base address of the .plt section. |
| 6541 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| 6542 | Address plt_base = this->targ_->plt_section()->address(); |
| 6543 | |
| 6544 | if (size == 64) |
| 6545 | { |
| 6546 | if (this->end_branch_table_ != 0) |
| 6547 | { |
| 6548 | // Write pltresolve stub. |
| 6549 | p = oview; |
| 6550 | Address after_bcl = this->address() + 16; |
| 6551 | Address pltoff = plt_base - after_bcl; |
| 6552 | |
| 6553 | elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8; |
| 6554 | |
| 6555 | if (this->targ_->abiversion() < 2) |
| 6556 | { |
| 6557 | write_insn<big_endian>(p, mflr_12), p += 4; |
| 6558 | write_insn<big_endian>(p, bcl_20_31), p += 4; |
| 6559 | write_insn<big_endian>(p, mflr_11), p += 4; |
| 6560 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; |
| 6561 | write_insn<big_endian>(p, mtlr_12), p += 4; |
| 6562 | write_insn<big_endian>(p, add_11_2_11), p += 4; |
| 6563 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; |
| 6564 | write_insn<big_endian>(p, ld_2_11 + 8), p += 4; |
| 6565 | write_insn<big_endian>(p, mtctr_12), p += 4; |
| 6566 | write_insn<big_endian>(p, ld_11_11 + 16), p += 4; |
| 6567 | } |
| 6568 | else |
| 6569 | { |
| 6570 | write_insn<big_endian>(p, mflr_0), p += 4; |
| 6571 | write_insn<big_endian>(p, bcl_20_31), p += 4; |
| 6572 | write_insn<big_endian>(p, mflr_11), p += 4; |
| 6573 | write_insn<big_endian>(p, std_2_1 + 24), p += 4; |
| 6574 | write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4; |
| 6575 | write_insn<big_endian>(p, mtlr_0), p += 4; |
| 6576 | write_insn<big_endian>(p, sub_12_12_11), p += 4; |
| 6577 | write_insn<big_endian>(p, add_11_2_11), p += 4; |
| 6578 | write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4; |
| 6579 | write_insn<big_endian>(p, ld_12_11 + 0), p += 4; |
| 6580 | write_insn<big_endian>(p, srdi_0_0_2), p += 4; |
| 6581 | write_insn<big_endian>(p, mtctr_12), p += 4; |
| 6582 | write_insn<big_endian>(p, ld_11_11 + 8), p += 4; |
| 6583 | } |
| 6584 | write_insn<big_endian>(p, bctr), p += 4; |
| 6585 | gold_assert(p == oview + this->pltresolve_size()); |
| 6586 | |
| 6587 | // Write lazy link call stubs. |
| 6588 | uint32_t indx = 0; |
| 6589 | while (p < oview + this->end_branch_table_) |
| 6590 | { |
| 6591 | if (this->targ_->abiversion() < 2) |
| 6592 | { |
| 6593 | if (indx < 0x8000) |
| 6594 | { |
| 6595 | write_insn<big_endian>(p, li_0_0 + indx), p += 4; |
| 6596 | } |
| 6597 | else |
| 6598 | { |
| 6599 | write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4; |
| 6600 | write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4; |
| 6601 | } |
| 6602 | } |
| 6603 | uint32_t branch_off = 8 - (p - oview); |
| 6604 | write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4; |
| 6605 | indx++; |
| 6606 | } |
| 6607 | } |
| 6608 | |
| 6609 | Address plt_base = this->targ_->plt_section()->address(); |
| 6610 | Address iplt_base = invalid_address; |
| 6611 | unsigned int global_entry_off = this->global_entry_off(); |
| 6612 | Address global_entry_base = this->address() + global_entry_off; |
| 6613 | typename Global_entry_stub_entries::const_iterator ge; |
| 6614 | for (ge = this->global_entry_stubs_.begin(); |
| 6615 | ge != this->global_entry_stubs_.end(); |
| 6616 | ++ge) |
| 6617 | { |
| 6618 | p = oview + global_entry_off + ge->second; |
| 6619 | Address plt_addr = ge->first->plt_offset(); |
| 6620 | if (ge->first->type() == elfcpp::STT_GNU_IFUNC |
| 6621 | && ge->first->can_use_relative_reloc(false)) |
| 6622 | { |
| 6623 | if (iplt_base == invalid_address) |
| 6624 | iplt_base = this->targ_->iplt_section()->address(); |
| 6625 | plt_addr += iplt_base; |
| 6626 | } |
| 6627 | else |
| 6628 | plt_addr += plt_base; |
| 6629 | Address my_addr = global_entry_base + ge->second; |
| 6630 | Address off = plt_addr - my_addr; |
| 6631 | |
| 6632 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) |
| 6633 | gold_error(_("linkage table error against `%s'"), |
| 6634 | ge->first->demangled_name().c_str()); |
| 6635 | |
| 6636 | write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4; |
| 6637 | write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4; |
| 6638 | write_insn<big_endian>(p, mtctr_12), p += 4; |
| 6639 | write_insn<big_endian>(p, bctr); |
| 6640 | } |
| 6641 | } |
| 6642 | else |
| 6643 | { |
| 6644 | const Output_data_got_powerpc<size, big_endian>* got |
| 6645 | = this->targ_->got_section(); |
| 6646 | // The address of _GLOBAL_OFFSET_TABLE_. |
| 6647 | Address g_o_t = got->address() + got->g_o_t(); |
| 6648 | |
| 6649 | // Write out pltresolve branch table. |
| 6650 | p = oview; |
| 6651 | unsigned int the_end = oview_size - this->pltresolve_size(); |
| 6652 | unsigned char* end_p = oview + the_end; |
| 6653 | while (p < end_p - 8 * 4) |
| 6654 | write_insn<big_endian>(p, b + end_p - p), p += 4; |
| 6655 | while (p < end_p) |
| 6656 | write_insn<big_endian>(p, nop), p += 4; |
| 6657 | |
| 6658 | // Write out pltresolve call stub. |
| 6659 | end_p = oview + oview_size; |
| 6660 | if (parameters->options().output_is_position_independent()) |
| 6661 | { |
| 6662 | Address res0_off = 0; |
| 6663 | Address after_bcl_off = the_end + 12; |
| 6664 | Address bcl_res0 = after_bcl_off - res0_off; |
| 6665 | |
| 6666 | write_insn<big_endian>(p, addis_11_11 + ha(bcl_res0)); |
| 6667 | p += 4; |
| 6668 | write_insn<big_endian>(p, mflr_0); |
| 6669 | p += 4; |
| 6670 | write_insn<big_endian>(p, bcl_20_31); |
| 6671 | p += 4; |
| 6672 | write_insn<big_endian>(p, addi_11_11 + l(bcl_res0)); |
| 6673 | p += 4; |
| 6674 | write_insn<big_endian>(p, mflr_12); |
| 6675 | p += 4; |
| 6676 | write_insn<big_endian>(p, mtlr_0); |
| 6677 | p += 4; |
| 6678 | write_insn<big_endian>(p, sub_11_11_12); |
| 6679 | p += 4; |
| 6680 | |
| 6681 | Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address()); |
| 6682 | |
| 6683 | write_insn<big_endian>(p, addis_12_12 + ha(got_bcl)); |
| 6684 | p += 4; |
| 6685 | if (ha(got_bcl) == ha(got_bcl + 4)) |
| 6686 | { |
| 6687 | write_insn<big_endian>(p, lwz_0_12 + l(got_bcl)); |
| 6688 | p += 4; |
| 6689 | write_insn<big_endian>(p, lwz_12_12 + l(got_bcl + 4)); |
| 6690 | } |
| 6691 | else |
| 6692 | { |
| 6693 | write_insn<big_endian>(p, lwzu_0_12 + l(got_bcl)); |
| 6694 | p += 4; |
| 6695 | write_insn<big_endian>(p, lwz_12_12 + 4); |
| 6696 | } |
| 6697 | p += 4; |
| 6698 | write_insn<big_endian>(p, mtctr_0); |
| 6699 | p += 4; |
| 6700 | write_insn<big_endian>(p, add_0_11_11); |
| 6701 | p += 4; |
| 6702 | write_insn<big_endian>(p, add_11_0_11); |
| 6703 | } |
| 6704 | else |
| 6705 | { |
| 6706 | Address res0 = this->address(); |
| 6707 | |
| 6708 | write_insn<big_endian>(p, lis_12 + ha(g_o_t + 4)); |
| 6709 | p += 4; |
| 6710 | write_insn<big_endian>(p, addis_11_11 + ha(-res0)); |
| 6711 | p += 4; |
| 6712 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) |
| 6713 | write_insn<big_endian>(p, lwz_0_12 + l(g_o_t + 4)); |
| 6714 | else |
| 6715 | write_insn<big_endian>(p, lwzu_0_12 + l(g_o_t + 4)); |
| 6716 | p += 4; |
| 6717 | write_insn<big_endian>(p, addi_11_11 + l(-res0)); |
| 6718 | p += 4; |
| 6719 | write_insn<big_endian>(p, mtctr_0); |
| 6720 | p += 4; |
| 6721 | write_insn<big_endian>(p, add_0_11_11); |
| 6722 | p += 4; |
| 6723 | if (ha(g_o_t + 4) == ha(g_o_t + 8)) |
| 6724 | write_insn<big_endian>(p, lwz_12_12 + l(g_o_t + 8)); |
| 6725 | else |
| 6726 | write_insn<big_endian>(p, lwz_12_12 + 4); |
| 6727 | p += 4; |
| 6728 | write_insn<big_endian>(p, add_11_0_11); |
| 6729 | } |
| 6730 | p += 4; |
| 6731 | write_insn<big_endian>(p, bctr); |
| 6732 | p += 4; |
| 6733 | while (p < end_p) |
| 6734 | { |
| 6735 | write_insn<big_endian>(p, nop); |
| 6736 | p += 4; |
| 6737 | } |
| 6738 | } |
| 6739 | |
| 6740 | of->write_output_view(off, oview_size, oview); |
| 6741 | } |
| 6742 | |
| 6743 | |
| 6744 | // A class to handle linker generated save/restore functions. |
| 6745 | |
| 6746 | template<int size, bool big_endian> |
| 6747 | class Output_data_save_res : public Output_section_data_build |
| 6748 | { |
| 6749 | public: |
| 6750 | Output_data_save_res(Symbol_table* symtab); |
| 6751 | |
| 6752 | const unsigned char* |
| 6753 | contents() const |
| 6754 | { |
| 6755 | return contents_; |
| 6756 | } |
| 6757 | |
| 6758 | protected: |
| 6759 | // Write to a map file. |
| 6760 | void |
| 6761 | do_print_to_mapfile(Mapfile* mapfile) const |
| 6762 | { mapfile->print_output_data(this, _("** save/restore")); } |
| 6763 | |
| 6764 | void |
| 6765 | do_write(Output_file*); |
| 6766 | |
| 6767 | private: |
| 6768 | // The maximum size of save/restore contents. |
| 6769 | static const unsigned int savres_max = 218*4; |
| 6770 | |
| 6771 | void |
| 6772 | savres_define(Symbol_table* symtab, |
| 6773 | const char *name, |
| 6774 | unsigned int lo, unsigned int hi, |
| 6775 | unsigned char* write_ent(unsigned char*, int), |
| 6776 | unsigned char* write_tail(unsigned char*, int)); |
| 6777 | |
| 6778 | unsigned char *contents_; |
| 6779 | }; |
| 6780 | |
| 6781 | template<bool big_endian> |
| 6782 | static unsigned char* |
| 6783 | savegpr0(unsigned char* p, int r) |
| 6784 | { |
| 6785 | uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; |
| 6786 | write_insn<big_endian>(p, insn); |
| 6787 | return p + 4; |
| 6788 | } |
| 6789 | |
| 6790 | template<bool big_endian> |
| 6791 | static unsigned char* |
| 6792 | savegpr0_tail(unsigned char* p, int r) |
| 6793 | { |
| 6794 | p = savegpr0<big_endian>(p, r); |
| 6795 | uint32_t insn = std_0_1 + 16; |
| 6796 | write_insn<big_endian>(p, insn); |
| 6797 | p = p + 4; |
| 6798 | write_insn<big_endian>(p, blr); |
| 6799 | return p + 4; |
| 6800 | } |
| 6801 | |
| 6802 | template<bool big_endian> |
| 6803 | static unsigned char* |
| 6804 | restgpr0(unsigned char* p, int r) |
| 6805 | { |
| 6806 | uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; |
| 6807 | write_insn<big_endian>(p, insn); |
| 6808 | return p + 4; |
| 6809 | } |
| 6810 | |
| 6811 | template<bool big_endian> |
| 6812 | static unsigned char* |
| 6813 | restgpr0_tail(unsigned char* p, int r) |
| 6814 | { |
| 6815 | uint32_t insn = ld_0_1 + 16; |
| 6816 | write_insn<big_endian>(p, insn); |
| 6817 | p = p + 4; |
| 6818 | p = restgpr0<big_endian>(p, r); |
| 6819 | write_insn<big_endian>(p, mtlr_0); |
| 6820 | p = p + 4; |
| 6821 | if (r == 29) |
| 6822 | { |
| 6823 | p = restgpr0<big_endian>(p, 30); |
| 6824 | p = restgpr0<big_endian>(p, 31); |
| 6825 | } |
| 6826 | write_insn<big_endian>(p, blr); |
| 6827 | return p + 4; |
| 6828 | } |
| 6829 | |
| 6830 | template<bool big_endian> |
| 6831 | static unsigned char* |
| 6832 | savegpr1(unsigned char* p, int r) |
| 6833 | { |
| 6834 | uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; |
| 6835 | write_insn<big_endian>(p, insn); |
| 6836 | return p + 4; |
| 6837 | } |
| 6838 | |
| 6839 | template<bool big_endian> |
| 6840 | static unsigned char* |
| 6841 | savegpr1_tail(unsigned char* p, int r) |
| 6842 | { |
| 6843 | p = savegpr1<big_endian>(p, r); |
| 6844 | write_insn<big_endian>(p, blr); |
| 6845 | return p + 4; |
| 6846 | } |
| 6847 | |
| 6848 | template<bool big_endian> |
| 6849 | static unsigned char* |
| 6850 | restgpr1(unsigned char* p, int r) |
| 6851 | { |
| 6852 | uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8; |
| 6853 | write_insn<big_endian>(p, insn); |
| 6854 | return p + 4; |
| 6855 | } |
| 6856 | |
| 6857 | template<bool big_endian> |
| 6858 | static unsigned char* |
| 6859 | restgpr1_tail(unsigned char* p, int r) |
| 6860 | { |
| 6861 | p = restgpr1<big_endian>(p, r); |
| 6862 | write_insn<big_endian>(p, blr); |
| 6863 | return p + 4; |
| 6864 | } |
| 6865 | |
| 6866 | template<bool big_endian> |
| 6867 | static unsigned char* |
| 6868 | savefpr(unsigned char* p, int r) |
| 6869 | { |
| 6870 | uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; |
| 6871 | write_insn<big_endian>(p, insn); |
| 6872 | return p + 4; |
| 6873 | } |
| 6874 | |
| 6875 | template<bool big_endian> |
| 6876 | static unsigned char* |
| 6877 | savefpr0_tail(unsigned char* p, int r) |
| 6878 | { |
| 6879 | p = savefpr<big_endian>(p, r); |
| 6880 | write_insn<big_endian>(p, std_0_1 + 16); |
| 6881 | p = p + 4; |
| 6882 | write_insn<big_endian>(p, blr); |
| 6883 | return p + 4; |
| 6884 | } |
| 6885 | |
| 6886 | template<bool big_endian> |
| 6887 | static unsigned char* |
| 6888 | restfpr(unsigned char* p, int r) |
| 6889 | { |
| 6890 | uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8; |
| 6891 | write_insn<big_endian>(p, insn); |
| 6892 | return p + 4; |
| 6893 | } |
| 6894 | |
| 6895 | template<bool big_endian> |
| 6896 | static unsigned char* |
| 6897 | restfpr0_tail(unsigned char* p, int r) |
| 6898 | { |
| 6899 | write_insn<big_endian>(p, ld_0_1 + 16); |
| 6900 | p = p + 4; |
| 6901 | p = restfpr<big_endian>(p, r); |
| 6902 | write_insn<big_endian>(p, mtlr_0); |
| 6903 | p = p + 4; |
| 6904 | if (r == 29) |
| 6905 | { |
| 6906 | p = restfpr<big_endian>(p, 30); |
| 6907 | p = restfpr<big_endian>(p, 31); |
| 6908 | } |
| 6909 | write_insn<big_endian>(p, blr); |
| 6910 | return p + 4; |
| 6911 | } |
| 6912 | |
| 6913 | template<bool big_endian> |
| 6914 | static unsigned char* |
| 6915 | savefpr1_tail(unsigned char* p, int r) |
| 6916 | { |
| 6917 | p = savefpr<big_endian>(p, r); |
| 6918 | write_insn<big_endian>(p, blr); |
| 6919 | return p + 4; |
| 6920 | } |
| 6921 | |
| 6922 | template<bool big_endian> |
| 6923 | static unsigned char* |
| 6924 | restfpr1_tail(unsigned char* p, int r) |
| 6925 | { |
| 6926 | p = restfpr<big_endian>(p, r); |
| 6927 | write_insn<big_endian>(p, blr); |
| 6928 | return p + 4; |
| 6929 | } |
| 6930 | |
| 6931 | template<bool big_endian> |
| 6932 | static unsigned char* |
| 6933 | savevr(unsigned char* p, int r) |
| 6934 | { |
| 6935 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; |
| 6936 | write_insn<big_endian>(p, insn); |
| 6937 | p = p + 4; |
| 6938 | insn = stvx_0_12_0 + (r << 21); |
| 6939 | write_insn<big_endian>(p, insn); |
| 6940 | return p + 4; |
| 6941 | } |
| 6942 | |
| 6943 | template<bool big_endian> |
| 6944 | static unsigned char* |
| 6945 | savevr_tail(unsigned char* p, int r) |
| 6946 | { |
| 6947 | p = savevr<big_endian>(p, r); |
| 6948 | write_insn<big_endian>(p, blr); |
| 6949 | return p + 4; |
| 6950 | } |
| 6951 | |
| 6952 | template<bool big_endian> |
| 6953 | static unsigned char* |
| 6954 | restvr(unsigned char* p, int r) |
| 6955 | { |
| 6956 | uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16; |
| 6957 | write_insn<big_endian>(p, insn); |
| 6958 | p = p + 4; |
| 6959 | insn = lvx_0_12_0 + (r << 21); |
| 6960 | write_insn<big_endian>(p, insn); |
| 6961 | return p + 4; |
| 6962 | } |
| 6963 | |
| 6964 | template<bool big_endian> |
| 6965 | static unsigned char* |
| 6966 | restvr_tail(unsigned char* p, int r) |
| 6967 | { |
| 6968 | p = restvr<big_endian>(p, r); |
| 6969 | write_insn<big_endian>(p, blr); |
| 6970 | return p + 4; |
| 6971 | } |
| 6972 | |
| 6973 | |
| 6974 | template<int size, bool big_endian> |
| 6975 | Output_data_save_res<size, big_endian>::Output_data_save_res( |
| 6976 | Symbol_table* symtab) |
| 6977 | : Output_section_data_build(4), |
| 6978 | contents_(NULL) |
| 6979 | { |
| 6980 | this->savres_define(symtab, |
| 6981 | "_savegpr0_", 14, 31, |
| 6982 | savegpr0<big_endian>, savegpr0_tail<big_endian>); |
| 6983 | this->savres_define(symtab, |
| 6984 | "_restgpr0_", 14, 29, |
| 6985 | restgpr0<big_endian>, restgpr0_tail<big_endian>); |
| 6986 | this->savres_define(symtab, |
| 6987 | "_restgpr0_", 30, 31, |
| 6988 | restgpr0<big_endian>, restgpr0_tail<big_endian>); |
| 6989 | this->savres_define(symtab, |
| 6990 | "_savegpr1_", 14, 31, |
| 6991 | savegpr1<big_endian>, savegpr1_tail<big_endian>); |
| 6992 | this->savres_define(symtab, |
| 6993 | "_restgpr1_", 14, 31, |
| 6994 | restgpr1<big_endian>, restgpr1_tail<big_endian>); |
| 6995 | this->savres_define(symtab, |
| 6996 | "_savefpr_", 14, 31, |
| 6997 | savefpr<big_endian>, savefpr0_tail<big_endian>); |
| 6998 | this->savres_define(symtab, |
| 6999 | "_restfpr_", 14, 29, |
| 7000 | restfpr<big_endian>, restfpr0_tail<big_endian>); |
| 7001 | this->savres_define(symtab, |
| 7002 | "_restfpr_", 30, 31, |
| 7003 | restfpr<big_endian>, restfpr0_tail<big_endian>); |
| 7004 | this->savres_define(symtab, |
| 7005 | "._savef", 14, 31, |
| 7006 | savefpr<big_endian>, savefpr1_tail<big_endian>); |
| 7007 | this->savres_define(symtab, |
| 7008 | "._restf", 14, 31, |
| 7009 | restfpr<big_endian>, restfpr1_tail<big_endian>); |
| 7010 | this->savres_define(symtab, |
| 7011 | "_savevr_", 20, 31, |
| 7012 | savevr<big_endian>, savevr_tail<big_endian>); |
| 7013 | this->savres_define(symtab, |
| 7014 | "_restvr_", 20, 31, |
| 7015 | restvr<big_endian>, restvr_tail<big_endian>); |
| 7016 | } |
| 7017 | |
| 7018 | template<int size, bool big_endian> |
| 7019 | void |
| 7020 | Output_data_save_res<size, big_endian>::savres_define( |
| 7021 | Symbol_table* symtab, |
| 7022 | const char *name, |
| 7023 | unsigned int lo, unsigned int hi, |
| 7024 | unsigned char* write_ent(unsigned char*, int), |
| 7025 | unsigned char* write_tail(unsigned char*, int)) |
| 7026 | { |
| 7027 | size_t len = strlen(name); |
| 7028 | bool writing = false; |
| 7029 | char sym[16]; |
| 7030 | |
| 7031 | memcpy(sym, name, len); |
| 7032 | sym[len + 2] = 0; |
| 7033 | |
| 7034 | for (unsigned int i = lo; i <= hi; i++) |
| 7035 | { |
| 7036 | sym[len + 0] = i / 10 + '0'; |
| 7037 | sym[len + 1] = i % 10 + '0'; |
| 7038 | Symbol* gsym = symtab->lookup(sym); |
| 7039 | bool refd = gsym != NULL && gsym->is_undefined(); |
| 7040 | writing = writing || refd; |
| 7041 | if (writing) |
| 7042 | { |
| 7043 | if (this->contents_ == NULL) |
| 7044 | this->contents_ = new unsigned char[this->savres_max]; |
| 7045 | |
| 7046 | section_size_type value = this->current_data_size(); |
| 7047 | unsigned char* p = this->contents_ + value; |
| 7048 | if (i != hi) |
| 7049 | p = write_ent(p, i); |
| 7050 | else |
| 7051 | p = write_tail(p, i); |
| 7052 | section_size_type cur_size = p - this->contents_; |
| 7053 | this->set_current_data_size(cur_size); |
| 7054 | if (refd) |
| 7055 | symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED, |
| 7056 | this, value, cur_size - value, |
| 7057 | elfcpp::STT_FUNC, elfcpp::STB_GLOBAL, |
| 7058 | elfcpp::STV_HIDDEN, 0, false, false); |
| 7059 | } |
| 7060 | } |
| 7061 | } |
| 7062 | |
| 7063 | // Write out save/restore. |
| 7064 | |
| 7065 | template<int size, bool big_endian> |
| 7066 | void |
| 7067 | Output_data_save_res<size, big_endian>::do_write(Output_file* of) |
| 7068 | { |
| 7069 | const section_size_type off = this->offset(); |
| 7070 | const section_size_type oview_size = |
| 7071 | convert_to_section_size_type(this->data_size()); |
| 7072 | unsigned char* const oview = of->get_output_view(off, oview_size); |
| 7073 | memcpy(oview, this->contents_, oview_size); |
| 7074 | of->write_output_view(off, oview_size, oview); |
| 7075 | } |
| 7076 | |
| 7077 | |
| 7078 | // Create the glink section. |
| 7079 | |
| 7080 | template<int size, bool big_endian> |
| 7081 | void |
| 7082 | Target_powerpc<size, big_endian>::make_glink_section(Layout* layout) |
| 7083 | { |
| 7084 | if (this->glink_ == NULL) |
| 7085 | { |
| 7086 | this->glink_ = new Output_data_glink<size, big_endian>(this); |
| 7087 | this->glink_->add_eh_frame(layout); |
| 7088 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
| 7089 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, |
| 7090 | this->glink_, ORDER_TEXT, false); |
| 7091 | } |
| 7092 | } |
| 7093 | |
| 7094 | // Create a PLT entry for a global symbol. |
| 7095 | |
| 7096 | template<int size, bool big_endian> |
| 7097 | void |
| 7098 | Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
| 7099 | Layout* layout, |
| 7100 | Symbol* gsym) |
| 7101 | { |
| 7102 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
| 7103 | && gsym->can_use_relative_reloc(false)) |
| 7104 | { |
| 7105 | if (this->iplt_ == NULL) |
| 7106 | this->make_iplt_section(symtab, layout); |
| 7107 | this->iplt_->add_ifunc_entry(gsym); |
| 7108 | } |
| 7109 | else |
| 7110 | { |
| 7111 | if (this->plt_ == NULL) |
| 7112 | this->make_plt_section(symtab, layout); |
| 7113 | this->plt_->add_entry(gsym); |
| 7114 | } |
| 7115 | } |
| 7116 | |
| 7117 | // Make a PLT entry for a local symbol. |
| 7118 | |
| 7119 | template<int size, bool big_endian> |
| 7120 | void |
| 7121 | Target_powerpc<size, big_endian>::make_local_plt_entry( |
| 7122 | Layout* layout, |
| 7123 | Sized_relobj_file<size, big_endian>* relobj, |
| 7124 | unsigned int r_sym) |
| 7125 | { |
| 7126 | if (this->lplt_ == NULL) |
| 7127 | this->make_lplt_section(layout); |
| 7128 | this->lplt_->add_local_entry(relobj, r_sym); |
| 7129 | } |
| 7130 | |
| 7131 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
| 7132 | |
| 7133 | template<int size, bool big_endian> |
| 7134 | void |
| 7135 | Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry( |
| 7136 | Symbol_table* symtab, |
| 7137 | Layout* layout, |
| 7138 | Sized_relobj_file<size, big_endian>* relobj, |
| 7139 | unsigned int r_sym) |
| 7140 | { |
| 7141 | if (this->iplt_ == NULL) |
| 7142 | this->make_iplt_section(symtab, layout); |
| 7143 | this->iplt_->add_local_ifunc_entry(relobj, r_sym); |
| 7144 | } |
| 7145 | |
| 7146 | // Return the number of entries in the PLT. |
| 7147 | |
| 7148 | template<int size, bool big_endian> |
| 7149 | unsigned int |
| 7150 | Target_powerpc<size, big_endian>::plt_entry_count() const |
| 7151 | { |
| 7152 | if (this->plt_ == NULL) |
| 7153 | return 0; |
| 7154 | return this->plt_->entry_count(); |
| 7155 | } |
| 7156 | |
| 7157 | // Create a GOT entry for local dynamic __tls_get_addr calls. |
| 7158 | |
| 7159 | template<int size, bool big_endian> |
| 7160 | unsigned int |
| 7161 | Target_powerpc<size, big_endian>::tlsld_got_offset( |
| 7162 | Symbol_table* symtab, |
| 7163 | Layout* layout, |
| 7164 | Sized_relobj_file<size, big_endian>* object) |
| 7165 | { |
| 7166 | if (this->tlsld_got_offset_ == -1U) |
| 7167 | { |
| 7168 | gold_assert(symtab != NULL && layout != NULL && object != NULL); |
| 7169 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); |
| 7170 | Output_data_got_powerpc<size, big_endian>* got |
| 7171 | = this->got_section(symtab, layout); |
| 7172 | unsigned int got_offset = got->add_constant_pair(0, 0); |
| 7173 | rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got, |
| 7174 | got_offset, 0); |
| 7175 | this->tlsld_got_offset_ = got_offset; |
| 7176 | } |
| 7177 | return this->tlsld_got_offset_; |
| 7178 | } |
| 7179 | |
| 7180 | // Get the Reference_flags for a particular relocation. |
| 7181 | |
| 7182 | template<int size, bool big_endian> |
| 7183 | int |
| 7184 | Target_powerpc<size, big_endian>::Scan::get_reference_flags( |
| 7185 | unsigned int r_type, |
| 7186 | const Target_powerpc* target) |
| 7187 | { |
| 7188 | int ref = 0; |
| 7189 | |
| 7190 | switch (r_type) |
| 7191 | { |
| 7192 | case elfcpp::R_POWERPC_NONE: |
| 7193 | case elfcpp::R_POWERPC_GNU_VTINHERIT: |
| 7194 | case elfcpp::R_POWERPC_GNU_VTENTRY: |
| 7195 | case elfcpp::R_PPC64_TOC: |
| 7196 | // No symbol reference. |
| 7197 | break; |
| 7198 | |
| 7199 | case elfcpp::R_PPC64_ADDR64: |
| 7200 | case elfcpp::R_PPC64_UADDR64: |
| 7201 | case elfcpp::R_POWERPC_ADDR32: |
| 7202 | case elfcpp::R_POWERPC_UADDR32: |
| 7203 | case elfcpp::R_POWERPC_ADDR16: |
| 7204 | case elfcpp::R_POWERPC_UADDR16: |
| 7205 | case elfcpp::R_POWERPC_ADDR16_LO: |
| 7206 | case elfcpp::R_POWERPC_ADDR16_HI: |
| 7207 | case elfcpp::R_POWERPC_ADDR16_HA: |
| 7208 | case elfcpp::R_PPC64_ADDR16_HIGHER34: |
| 7209 | case elfcpp::R_PPC64_ADDR16_HIGHERA34: |
| 7210 | case elfcpp::R_PPC64_ADDR16_HIGHEST34: |
| 7211 | case elfcpp::R_PPC64_ADDR16_HIGHESTA34: |
| 7212 | case elfcpp::R_PPC64_D34: |
| 7213 | case elfcpp::R_PPC64_D34_LO: |
| 7214 | case elfcpp::R_PPC64_D34_HI30: |
| 7215 | case elfcpp::R_PPC64_D34_HA30: |
| 7216 | case elfcpp::R_PPC64_D28: |
| 7217 | ref = Symbol::ABSOLUTE_REF; |
| 7218 | break; |
| 7219 | |
| 7220 | case elfcpp::R_POWERPC_ADDR24: |
| 7221 | case elfcpp::R_POWERPC_ADDR14: |
| 7222 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
| 7223 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
| 7224 | ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
| 7225 | break; |
| 7226 | |
| 7227 | case elfcpp::R_PPC64_REL64: |
| 7228 | case elfcpp::R_POWERPC_REL32: |
| 7229 | case elfcpp::R_PPC_LOCAL24PC: |
| 7230 | case elfcpp::R_POWERPC_REL16: |
| 7231 | case elfcpp::R_POWERPC_REL16_LO: |
| 7232 | case elfcpp::R_POWERPC_REL16_HI: |
| 7233 | case elfcpp::R_POWERPC_REL16_HA: |
| 7234 | case elfcpp::R_PPC64_REL16_HIGH: |
| 7235 | case elfcpp::R_PPC64_REL16_HIGHA: |
| 7236 | case elfcpp::R_PPC64_REL16_HIGHER: |
| 7237 | case elfcpp::R_PPC64_REL16_HIGHERA: |
| 7238 | case elfcpp::R_PPC64_REL16_HIGHEST: |
| 7239 | case elfcpp::R_PPC64_REL16_HIGHESTA: |
| 7240 | case elfcpp::R_PPC64_PCREL34: |
| 7241 | case elfcpp::R_PPC64_REL16_HIGHER34: |
| 7242 | case elfcpp::R_PPC64_REL16_HIGHERA34: |
| 7243 | case elfcpp::R_PPC64_REL16_HIGHEST34: |
| 7244 | case elfcpp::R_PPC64_REL16_HIGHESTA34: |
| 7245 | case elfcpp::R_PPC64_PCREL28: |
| 7246 | ref = Symbol::RELATIVE_REF; |
| 7247 | break; |
| 7248 | |
| 7249 | case elfcpp::R_PPC64_REL24_NOTOC: |
| 7250 | if (size == 32) |
| 7251 | break; |
| 7252 | // Fall through. |
| 7253 | case elfcpp::R_POWERPC_REL24: |
| 7254 | case elfcpp::R_PPC_PLTREL24: |
| 7255 | case elfcpp::R_POWERPC_REL14: |
| 7256 | case elfcpp::R_POWERPC_REL14_BRTAKEN: |
| 7257 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: |
| 7258 | ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
| 7259 | break; |
| 7260 | |
| 7261 | case elfcpp::R_POWERPC_GOT16: |
| 7262 | case elfcpp::R_POWERPC_GOT16_LO: |
| 7263 | case elfcpp::R_POWERPC_GOT16_HI: |
| 7264 | case elfcpp::R_POWERPC_GOT16_HA: |
| 7265 | case elfcpp::R_PPC64_GOT16_DS: |
| 7266 | case elfcpp::R_PPC64_GOT16_LO_DS: |
| 7267 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 7268 | case elfcpp::R_PPC64_TOC16: |
| 7269 | case elfcpp::R_PPC64_TOC16_LO: |
| 7270 | case elfcpp::R_PPC64_TOC16_HI: |
| 7271 | case elfcpp::R_PPC64_TOC16_HA: |
| 7272 | case elfcpp::R_PPC64_TOC16_DS: |
| 7273 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 7274 | case elfcpp::R_POWERPC_PLT16_LO: |
| 7275 | case elfcpp::R_POWERPC_PLT16_HI: |
| 7276 | case elfcpp::R_POWERPC_PLT16_HA: |
| 7277 | case elfcpp::R_PPC64_PLT16_LO_DS: |
| 7278 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 7279 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 7280 | ref = Symbol::RELATIVE_REF; |
| 7281 | break; |
| 7282 | |
| 7283 | case elfcpp::R_POWERPC_GOT_TPREL16: |
| 7284 | case elfcpp::R_POWERPC_TLS: |
| 7285 | case elfcpp::R_PPC64_TLSGD: |
| 7286 | case elfcpp::R_PPC64_TLSLD: |
| 7287 | case elfcpp::R_PPC64_TPREL34: |
| 7288 | case elfcpp::R_PPC64_DTPREL34: |
| 7289 | case elfcpp::R_PPC64_GOT_TLSGD34: |
| 7290 | case elfcpp::R_PPC64_GOT_TLSLD34: |
| 7291 | case elfcpp::R_PPC64_GOT_TPREL34: |
| 7292 | case elfcpp::R_PPC64_GOT_DTPREL34: |
| 7293 | ref = Symbol::TLS_REF; |
| 7294 | break; |
| 7295 | |
| 7296 | case elfcpp::R_POWERPC_COPY: |
| 7297 | case elfcpp::R_POWERPC_GLOB_DAT: |
| 7298 | case elfcpp::R_POWERPC_JMP_SLOT: |
| 7299 | case elfcpp::R_POWERPC_RELATIVE: |
| 7300 | case elfcpp::R_POWERPC_DTPMOD: |
| 7301 | default: |
| 7302 | // Not expected. We will give an error later. |
| 7303 | break; |
| 7304 | } |
| 7305 | |
| 7306 | if (size == 64 && target->abiversion() < 2) |
| 7307 | ref |= Symbol::FUNC_DESC_ABI; |
| 7308 | return ref; |
| 7309 | } |
| 7310 | |
| 7311 | // Report an unsupported relocation against a local symbol. |
| 7312 | |
| 7313 | template<int size, bool big_endian> |
| 7314 | void |
| 7315 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local( |
| 7316 | Sized_relobj_file<size, big_endian>* object, |
| 7317 | unsigned int r_type) |
| 7318 | { |
| 7319 | gold_error(_("%s: unsupported reloc %u against local symbol"), |
| 7320 | object->name().c_str(), r_type); |
| 7321 | } |
| 7322 | |
| 7323 | // We are about to emit a dynamic relocation of type R_TYPE. If the |
| 7324 | // dynamic linker does not support it, issue an error. |
| 7325 | |
| 7326 | template<int size, bool big_endian> |
| 7327 | void |
| 7328 | Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object, |
| 7329 | unsigned int r_type) |
| 7330 | { |
| 7331 | gold_assert(r_type != elfcpp::R_POWERPC_NONE); |
| 7332 | |
| 7333 | // These are the relocation types supported by glibc for both 32-bit |
| 7334 | // and 64-bit powerpc. |
| 7335 | switch (r_type) |
| 7336 | { |
| 7337 | case elfcpp::R_POWERPC_NONE: |
| 7338 | case elfcpp::R_POWERPC_RELATIVE: |
| 7339 | case elfcpp::R_POWERPC_GLOB_DAT: |
| 7340 | case elfcpp::R_POWERPC_DTPMOD: |
| 7341 | case elfcpp::R_POWERPC_DTPREL: |
| 7342 | case elfcpp::R_POWERPC_TPREL: |
| 7343 | case elfcpp::R_POWERPC_JMP_SLOT: |
| 7344 | case elfcpp::R_POWERPC_COPY: |
| 7345 | case elfcpp::R_POWERPC_IRELATIVE: |
| 7346 | case elfcpp::R_POWERPC_ADDR32: |
| 7347 | case elfcpp::R_POWERPC_UADDR32: |
| 7348 | case elfcpp::R_POWERPC_ADDR24: |
| 7349 | case elfcpp::R_POWERPC_ADDR16: |
| 7350 | case elfcpp::R_POWERPC_UADDR16: |
| 7351 | case elfcpp::R_POWERPC_ADDR16_LO: |
| 7352 | case elfcpp::R_POWERPC_ADDR16_HI: |
| 7353 | case elfcpp::R_POWERPC_ADDR16_HA: |
| 7354 | case elfcpp::R_POWERPC_ADDR14: |
| 7355 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
| 7356 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
| 7357 | case elfcpp::R_POWERPC_REL32: |
| 7358 | case elfcpp::R_POWERPC_TPREL16: |
| 7359 | case elfcpp::R_POWERPC_TPREL16_LO: |
| 7360 | case elfcpp::R_POWERPC_TPREL16_HI: |
| 7361 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 7362 | return; |
| 7363 | |
| 7364 | default: |
| 7365 | break; |
| 7366 | } |
| 7367 | |
| 7368 | if (size == 64) |
| 7369 | { |
| 7370 | switch (r_type) |
| 7371 | { |
| 7372 | // These are the relocation types supported only on 64-bit. |
| 7373 | case elfcpp::R_PPC64_ADDR64: |
| 7374 | case elfcpp::R_PPC64_UADDR64: |
| 7375 | case elfcpp::R_PPC64_JMP_IREL: |
| 7376 | case elfcpp::R_PPC64_ADDR16_DS: |
| 7377 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
| 7378 | case elfcpp::R_PPC64_ADDR16_HIGH: |
| 7379 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
| 7380 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
| 7381 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
| 7382 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
| 7383 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
| 7384 | case elfcpp::R_PPC64_REL64: |
| 7385 | case elfcpp::R_POWERPC_ADDR30: |
| 7386 | case elfcpp::R_PPC64_TPREL16_DS: |
| 7387 | case elfcpp::R_PPC64_TPREL16_LO_DS: |
| 7388 | case elfcpp::R_PPC64_TPREL16_HIGH: |
| 7389 | case elfcpp::R_PPC64_TPREL16_HIGHA: |
| 7390 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
| 7391 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
| 7392 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
| 7393 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
| 7394 | return; |
| 7395 | |
| 7396 | default: |
| 7397 | break; |
| 7398 | } |
| 7399 | } |
| 7400 | else |
| 7401 | { |
| 7402 | switch (r_type) |
| 7403 | { |
| 7404 | // These are the relocation types supported only on 32-bit. |
| 7405 | // ??? glibc ld.so doesn't need to support these. |
| 7406 | case elfcpp::R_POWERPC_REL24: |
| 7407 | case elfcpp::R_POWERPC_DTPREL16: |
| 7408 | case elfcpp::R_POWERPC_DTPREL16_LO: |
| 7409 | case elfcpp::R_POWERPC_DTPREL16_HI: |
| 7410 | case elfcpp::R_POWERPC_DTPREL16_HA: |
| 7411 | return; |
| 7412 | |
| 7413 | default: |
| 7414 | break; |
| 7415 | } |
| 7416 | } |
| 7417 | |
| 7418 | // This prevents us from issuing more than one error per reloc |
| 7419 | // section. But we can still wind up issuing more than one |
| 7420 | // error per object file. |
| 7421 | if (this->issued_non_pic_error_) |
| 7422 | return; |
| 7423 | gold_assert(parameters->options().output_is_position_independent()); |
| 7424 | object->error(_("requires unsupported dynamic reloc; " |
| 7425 | "recompile with -fPIC")); |
| 7426 | this->issued_non_pic_error_ = true; |
| 7427 | return; |
| 7428 | } |
| 7429 | |
| 7430 | // Return whether we need to make a PLT entry for a relocation of the |
| 7431 | // given type against a STT_GNU_IFUNC symbol. |
| 7432 | |
| 7433 | template<int size, bool big_endian> |
| 7434 | bool |
| 7435 | Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( |
| 7436 | Target_powerpc<size, big_endian>* target, |
| 7437 | Sized_relobj_file<size, big_endian>* object, |
| 7438 | unsigned int r_type, |
| 7439 | bool report_err) |
| 7440 | { |
| 7441 | // In non-pic code any reference will resolve to the plt call stub |
| 7442 | // for the ifunc symbol. |
| 7443 | if ((size == 32 || target->abiversion() >= 2) |
| 7444 | && !parameters->options().output_is_position_independent()) |
| 7445 | return true; |
| 7446 | |
| 7447 | switch (r_type) |
| 7448 | { |
| 7449 | // Word size refs from data sections are OK, but don't need a PLT entry. |
| 7450 | case elfcpp::R_POWERPC_ADDR32: |
| 7451 | case elfcpp::R_POWERPC_UADDR32: |
| 7452 | if (size == 32) |
| 7453 | return false; |
| 7454 | break; |
| 7455 | |
| 7456 | case elfcpp::R_PPC64_ADDR64: |
| 7457 | case elfcpp::R_PPC64_UADDR64: |
| 7458 | if (size == 64) |
| 7459 | return false; |
| 7460 | break; |
| 7461 | |
| 7462 | // GOT refs are good, but also don't need a PLT entry. |
| 7463 | case elfcpp::R_POWERPC_GOT16: |
| 7464 | case elfcpp::R_POWERPC_GOT16_LO: |
| 7465 | case elfcpp::R_POWERPC_GOT16_HI: |
| 7466 | case elfcpp::R_POWERPC_GOT16_HA: |
| 7467 | case elfcpp::R_PPC64_GOT16_DS: |
| 7468 | case elfcpp::R_PPC64_GOT16_LO_DS: |
| 7469 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 7470 | return false; |
| 7471 | |
| 7472 | // PLT relocs are OK and need a PLT entry. |
| 7473 | case elfcpp::R_POWERPC_PLT16_LO: |
| 7474 | case elfcpp::R_POWERPC_PLT16_HI: |
| 7475 | case elfcpp::R_POWERPC_PLT16_HA: |
| 7476 | case elfcpp::R_PPC64_PLT16_LO_DS: |
| 7477 | case elfcpp::R_POWERPC_PLTSEQ: |
| 7478 | case elfcpp::R_POWERPC_PLTCALL: |
| 7479 | case elfcpp::R_PPC64_PLTSEQ_NOTOC: |
| 7480 | case elfcpp::R_PPC64_PLTCALL_NOTOC: |
| 7481 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 7482 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 7483 | return true; |
| 7484 | break; |
| 7485 | |
| 7486 | // Function calls are good, and these do need a PLT entry. |
| 7487 | case elfcpp::R_PPC64_REL24_NOTOC: |
| 7488 | if (size == 32) |
| 7489 | break; |
| 7490 | // Fall through. |
| 7491 | case elfcpp::R_POWERPC_ADDR24: |
| 7492 | case elfcpp::R_POWERPC_ADDR14: |
| 7493 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
| 7494 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
| 7495 | case elfcpp::R_POWERPC_REL24: |
| 7496 | case elfcpp::R_PPC_PLTREL24: |
| 7497 | case elfcpp::R_POWERPC_REL14: |
| 7498 | case elfcpp::R_POWERPC_REL14_BRTAKEN: |
| 7499 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: |
| 7500 | return true; |
| 7501 | |
| 7502 | default: |
| 7503 | break; |
| 7504 | } |
| 7505 | |
| 7506 | // Anything else is a problem. |
| 7507 | // If we are building a static executable, the libc startup function |
| 7508 | // responsible for applying indirect function relocations is going |
| 7509 | // to complain about the reloc type. |
| 7510 | // If we are building a dynamic executable, we will have a text |
| 7511 | // relocation. The dynamic loader will set the text segment |
| 7512 | // writable and non-executable to apply text relocations. So we'll |
| 7513 | // segfault when trying to run the indirection function to resolve |
| 7514 | // the reloc. |
| 7515 | if (report_err) |
| 7516 | gold_error(_("%s: unsupported reloc %u for IFUNC symbol"), |
| 7517 | object->name().c_str(), r_type); |
| 7518 | return false; |
| 7519 | } |
| 7520 | |
| 7521 | // Return TRUE iff INSN is one we expect on a _LO variety toc/got |
| 7522 | // reloc. |
| 7523 | |
| 7524 | static bool |
| 7525 | ok_lo_toc_insn(uint32_t insn, unsigned int r_type) |
| 7526 | { |
| 7527 | return ((insn & (0x3f << 26)) == 12u << 26 /* addic */ |
| 7528 | || (insn & (0x3f << 26)) == 14u << 26 /* addi */ |
| 7529 | || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ |
| 7530 | || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ |
| 7531 | || (insn & (0x3f << 26)) == 36u << 26 /* stw */ |
| 7532 | || (insn & (0x3f << 26)) == 38u << 26 /* stb */ |
| 7533 | || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ |
| 7534 | || (insn & (0x3f << 26)) == 42u << 26 /* lha */ |
| 7535 | || (insn & (0x3f << 26)) == 44u << 26 /* sth */ |
| 7536 | || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ |
| 7537 | || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ |
| 7538 | || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ |
| 7539 | || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ |
| 7540 | || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ |
| 7541 | || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ |
| 7542 | || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */ |
| 7543 | || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ |
| 7544 | /* Exclude lfqu by testing reloc. If relocs are ever |
| 7545 | defined for the reduced D field in psq_lu then those |
| 7546 | will need testing too. */ |
| 7547 | && r_type != elfcpp::R_PPC64_TOC16_LO |
| 7548 | && r_type != elfcpp::R_POWERPC_GOT16_LO) |
| 7549 | || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */ |
| 7550 | && (insn & 1) == 0) |
| 7551 | || (insn & (0x3f << 26)) == 60u << 26 /* stfq */ |
| 7552 | || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ |
| 7553 | /* Exclude stfqu. psq_stu as above for psq_lu. */ |
| 7554 | && r_type != elfcpp::R_PPC64_TOC16_LO |
| 7555 | && r_type != elfcpp::R_POWERPC_GOT16_LO) |
| 7556 | || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */ |
| 7557 | && (insn & 1) == 0)); |
| 7558 | } |
| 7559 | |
| 7560 | // Scan a relocation for a local symbol. |
| 7561 | |
| 7562 | template<int size, bool big_endian> |
| 7563 | inline void |
| 7564 | Target_powerpc<size, big_endian>::Scan::local( |
| 7565 | Symbol_table* symtab, |
| 7566 | Layout* layout, |
| 7567 | Target_powerpc<size, big_endian>* target, |
| 7568 | Sized_relobj_file<size, big_endian>* object, |
| 7569 | unsigned int data_shndx, |
| 7570 | Output_section* output_section, |
| 7571 | const elfcpp::Rela<size, big_endian>& reloc, |
| 7572 | unsigned int r_type, |
| 7573 | const elfcpp::Sym<size, big_endian>& lsym, |
| 7574 | bool is_discarded) |
| 7575 | { |
| 7576 | this->maybe_skip_tls_get_addr_call(target, r_type, NULL); |
| 7577 | |
| 7578 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) |
| 7579 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) |
| 7580 | { |
| 7581 | this->expect_tls_get_addr_call(); |
| 7582 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); |
| 7583 | if (tls_type != tls::TLSOPT_NONE) |
| 7584 | this->skip_next_tls_get_addr_call(); |
| 7585 | } |
| 7586 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) |
| 7587 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) |
| 7588 | { |
| 7589 | this->expect_tls_get_addr_call(); |
| 7590 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
| 7591 | if (tls_type != tls::TLSOPT_NONE) |
| 7592 | this->skip_next_tls_get_addr_call(); |
| 7593 | } |
| 7594 | |
| 7595 | Powerpc_relobj<size, big_endian>* ppc_object |
| 7596 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); |
| 7597 | |
| 7598 | if (is_discarded) |
| 7599 | { |
| 7600 | if (size == 64 |
| 7601 | && data_shndx == ppc_object->opd_shndx() |
| 7602 | && r_type == elfcpp::R_PPC64_ADDR64) |
| 7603 | ppc_object->set_opd_discard(reloc.get_r_offset()); |
| 7604 | return; |
| 7605 | } |
| 7606 | |
| 7607 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
| 7608 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; |
| 7609 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
| 7610 | { |
| 7611 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7612 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
| 7613 | r_type, r_sym, reloc.get_r_addend()); |
| 7614 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); |
| 7615 | } |
| 7616 | |
| 7617 | switch (r_type) |
| 7618 | { |
| 7619 | case elfcpp::R_POWERPC_NONE: |
| 7620 | case elfcpp::R_POWERPC_GNU_VTINHERIT: |
| 7621 | case elfcpp::R_POWERPC_GNU_VTENTRY: |
| 7622 | case elfcpp::R_POWERPC_TLS: |
| 7623 | case elfcpp::R_PPC64_ENTRY: |
| 7624 | case elfcpp::R_POWERPC_PLTSEQ: |
| 7625 | case elfcpp::R_POWERPC_PLTCALL: |
| 7626 | case elfcpp::R_PPC64_PLTSEQ_NOTOC: |
| 7627 | case elfcpp::R_PPC64_PLTCALL_NOTOC: |
| 7628 | case elfcpp::R_PPC64_PCREL_OPT: |
| 7629 | case elfcpp::R_PPC64_ADDR16_HIGHER34: |
| 7630 | case elfcpp::R_PPC64_ADDR16_HIGHERA34: |
| 7631 | case elfcpp::R_PPC64_ADDR16_HIGHEST34: |
| 7632 | case elfcpp::R_PPC64_ADDR16_HIGHESTA34: |
| 7633 | case elfcpp::R_PPC64_REL16_HIGHER34: |
| 7634 | case elfcpp::R_PPC64_REL16_HIGHERA34: |
| 7635 | case elfcpp::R_PPC64_REL16_HIGHEST34: |
| 7636 | case elfcpp::R_PPC64_REL16_HIGHESTA34: |
| 7637 | case elfcpp::R_PPC64_D34: |
| 7638 | case elfcpp::R_PPC64_D34_LO: |
| 7639 | case elfcpp::R_PPC64_D34_HI30: |
| 7640 | case elfcpp::R_PPC64_D34_HA30: |
| 7641 | case elfcpp::R_PPC64_D28: |
| 7642 | case elfcpp::R_PPC64_PCREL34: |
| 7643 | case elfcpp::R_PPC64_PCREL28: |
| 7644 | case elfcpp::R_PPC64_TPREL34: |
| 7645 | case elfcpp::R_PPC64_DTPREL34: |
| 7646 | break; |
| 7647 | |
| 7648 | case elfcpp::R_PPC64_TOC: |
| 7649 | { |
| 7650 | Output_data_got_powerpc<size, big_endian>* got |
| 7651 | = target->got_section(symtab, layout); |
| 7652 | if (parameters->options().output_is_position_independent()) |
| 7653 | { |
| 7654 | Address off = reloc.get_r_offset(); |
| 7655 | if (size == 64 |
| 7656 | && target->abiversion() < 2 |
| 7657 | && data_shndx == ppc_object->opd_shndx() |
| 7658 | && ppc_object->get_opd_discard(off - 8)) |
| 7659 | break; |
| 7660 | |
| 7661 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 7662 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
| 7663 | rela_dyn->add_output_section_relative(got->output_section(), |
| 7664 | elfcpp::R_POWERPC_RELATIVE, |
| 7665 | output_section, |
| 7666 | object, data_shndx, off, |
| 7667 | symobj->toc_base_offset()); |
| 7668 | } |
| 7669 | } |
| 7670 | break; |
| 7671 | |
| 7672 | case elfcpp::R_PPC64_ADDR64: |
| 7673 | case elfcpp::R_PPC64_UADDR64: |
| 7674 | case elfcpp::R_POWERPC_ADDR32: |
| 7675 | case elfcpp::R_POWERPC_UADDR32: |
| 7676 | case elfcpp::R_POWERPC_ADDR24: |
| 7677 | case elfcpp::R_POWERPC_ADDR16: |
| 7678 | case elfcpp::R_POWERPC_ADDR16_LO: |
| 7679 | case elfcpp::R_POWERPC_ADDR16_HI: |
| 7680 | case elfcpp::R_POWERPC_ADDR16_HA: |
| 7681 | case elfcpp::R_POWERPC_UADDR16: |
| 7682 | case elfcpp::R_PPC64_ADDR16_HIGH: |
| 7683 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
| 7684 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
| 7685 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
| 7686 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
| 7687 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
| 7688 | case elfcpp::R_PPC64_ADDR16_DS: |
| 7689 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
| 7690 | case elfcpp::R_POWERPC_ADDR14: |
| 7691 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
| 7692 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
| 7693 | // If building a shared library (or a position-independent |
| 7694 | // executable), we need to create a dynamic relocation for |
| 7695 | // this location. |
| 7696 | if (parameters->options().output_is_position_independent() |
| 7697 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
| 7698 | { |
| 7699 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
| 7700 | is_ifunc); |
| 7701 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7702 | if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32) |
| 7703 | || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64)) |
| 7704 | { |
| 7705 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
| 7706 | : elfcpp::R_POWERPC_RELATIVE); |
| 7707 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
| 7708 | output_section, data_shndx, |
| 7709 | reloc.get_r_offset(), |
| 7710 | reloc.get_r_addend(), false); |
| 7711 | } |
| 7712 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) |
| 7713 | { |
| 7714 | check_non_pic(object, r_type); |
| 7715 | rela_dyn->add_local(object, r_sym, r_type, output_section, |
| 7716 | data_shndx, reloc.get_r_offset(), |
| 7717 | reloc.get_r_addend()); |
| 7718 | } |
| 7719 | else |
| 7720 | { |
| 7721 | gold_assert(lsym.get_st_value() == 0); |
| 7722 | unsigned int shndx = lsym.get_st_shndx(); |
| 7723 | bool is_ordinary; |
| 7724 | shndx = object->adjust_sym_shndx(r_sym, shndx, |
| 7725 | &is_ordinary); |
| 7726 | if (!is_ordinary) |
| 7727 | object->error(_("section symbol %u has bad shndx %u"), |
| 7728 | r_sym, shndx); |
| 7729 | else |
| 7730 | rela_dyn->add_local_section(object, shndx, r_type, |
| 7731 | output_section, data_shndx, |
| 7732 | reloc.get_r_offset()); |
| 7733 | } |
| 7734 | } |
| 7735 | break; |
| 7736 | |
| 7737 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 7738 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 7739 | case elfcpp::R_POWERPC_PLT16_LO: |
| 7740 | case elfcpp::R_POWERPC_PLT16_HI: |
| 7741 | case elfcpp::R_POWERPC_PLT16_HA: |
| 7742 | case elfcpp::R_PPC64_PLT16_LO_DS: |
| 7743 | if (!is_ifunc) |
| 7744 | { |
| 7745 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7746 | target->make_local_plt_entry(layout, object, r_sym); |
| 7747 | } |
| 7748 | break; |
| 7749 | |
| 7750 | case elfcpp::R_PPC64_REL24_NOTOC: |
| 7751 | if (size == 32) |
| 7752 | break; |
| 7753 | // Fall through. |
| 7754 | case elfcpp::R_POWERPC_REL24: |
| 7755 | case elfcpp::R_PPC_PLTREL24: |
| 7756 | case elfcpp::R_PPC_LOCAL24PC: |
| 7757 | case elfcpp::R_POWERPC_REL14: |
| 7758 | case elfcpp::R_POWERPC_REL14_BRTAKEN: |
| 7759 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: |
| 7760 | if (!is_ifunc) |
| 7761 | { |
| 7762 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7763 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
| 7764 | r_type, r_sym, reloc.get_r_addend()); |
| 7765 | } |
| 7766 | break; |
| 7767 | |
| 7768 | case elfcpp::R_PPC64_TOCSAVE: |
| 7769 | // R_PPC64_TOCSAVE follows a call instruction to indicate the |
| 7770 | // caller has already saved r2 and thus a plt call stub need not |
| 7771 | // save r2. |
| 7772 | if (size == 64 |
| 7773 | && target->mark_pltcall(ppc_object, data_shndx, |
| 7774 | reloc.get_r_offset() - 4, symtab)) |
| 7775 | { |
| 7776 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7777 | unsigned int shndx = lsym.get_st_shndx(); |
| 7778 | bool is_ordinary; |
| 7779 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); |
| 7780 | if (!is_ordinary) |
| 7781 | object->error(_("tocsave symbol %u has bad shndx %u"), |
| 7782 | r_sym, shndx); |
| 7783 | else |
| 7784 | target->add_tocsave(ppc_object, shndx, |
| 7785 | lsym.get_st_value() + reloc.get_r_addend()); |
| 7786 | } |
| 7787 | break; |
| 7788 | |
| 7789 | case elfcpp::R_PPC64_REL64: |
| 7790 | case elfcpp::R_POWERPC_REL32: |
| 7791 | case elfcpp::R_POWERPC_REL16: |
| 7792 | case elfcpp::R_POWERPC_REL16_LO: |
| 7793 | case elfcpp::R_POWERPC_REL16_HI: |
| 7794 | case elfcpp::R_POWERPC_REL16_HA: |
| 7795 | case elfcpp::R_POWERPC_REL16DX_HA: |
| 7796 | case elfcpp::R_PPC64_REL16_HIGH: |
| 7797 | case elfcpp::R_PPC64_REL16_HIGHA: |
| 7798 | case elfcpp::R_PPC64_REL16_HIGHER: |
| 7799 | case elfcpp::R_PPC64_REL16_HIGHERA: |
| 7800 | case elfcpp::R_PPC64_REL16_HIGHEST: |
| 7801 | case elfcpp::R_PPC64_REL16_HIGHESTA: |
| 7802 | case elfcpp::R_POWERPC_SECTOFF: |
| 7803 | case elfcpp::R_POWERPC_SECTOFF_LO: |
| 7804 | case elfcpp::R_POWERPC_SECTOFF_HI: |
| 7805 | case elfcpp::R_POWERPC_SECTOFF_HA: |
| 7806 | case elfcpp::R_PPC64_SECTOFF_DS: |
| 7807 | case elfcpp::R_PPC64_SECTOFF_LO_DS: |
| 7808 | case elfcpp::R_POWERPC_TPREL16: |
| 7809 | case elfcpp::R_POWERPC_TPREL16_LO: |
| 7810 | case elfcpp::R_POWERPC_TPREL16_HI: |
| 7811 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 7812 | case elfcpp::R_PPC64_TPREL16_DS: |
| 7813 | case elfcpp::R_PPC64_TPREL16_LO_DS: |
| 7814 | case elfcpp::R_PPC64_TPREL16_HIGH: |
| 7815 | case elfcpp::R_PPC64_TPREL16_HIGHA: |
| 7816 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
| 7817 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
| 7818 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
| 7819 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
| 7820 | case elfcpp::R_POWERPC_DTPREL16: |
| 7821 | case elfcpp::R_POWERPC_DTPREL16_LO: |
| 7822 | case elfcpp::R_POWERPC_DTPREL16_HI: |
| 7823 | case elfcpp::R_POWERPC_DTPREL16_HA: |
| 7824 | case elfcpp::R_PPC64_DTPREL16_DS: |
| 7825 | case elfcpp::R_PPC64_DTPREL16_LO_DS: |
| 7826 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
| 7827 | case elfcpp::R_PPC64_DTPREL16_HIGHA: |
| 7828 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
| 7829 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
| 7830 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
| 7831 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
| 7832 | case elfcpp::R_PPC64_TLSGD: |
| 7833 | case elfcpp::R_PPC64_TLSLD: |
| 7834 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
| 7835 | break; |
| 7836 | |
| 7837 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 7838 | case elfcpp::R_POWERPC_GOT16: |
| 7839 | case elfcpp::R_POWERPC_GOT16_LO: |
| 7840 | case elfcpp::R_POWERPC_GOT16_HI: |
| 7841 | case elfcpp::R_POWERPC_GOT16_HA: |
| 7842 | case elfcpp::R_PPC64_GOT16_DS: |
| 7843 | case elfcpp::R_PPC64_GOT16_LO_DS: |
| 7844 | { |
| 7845 | // The symbol requires a GOT entry. |
| 7846 | Output_data_got_powerpc<size, big_endian>* got |
| 7847 | = target->got_section(symtab, layout); |
| 7848 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7849 | |
| 7850 | if (!parameters->options().output_is_position_independent()) |
| 7851 | { |
| 7852 | if (is_ifunc |
| 7853 | && (size == 32 || target->abiversion() >= 2)) |
| 7854 | got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); |
| 7855 | else |
| 7856 | got->add_local(object, r_sym, GOT_TYPE_STANDARD); |
| 7857 | } |
| 7858 | else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) |
| 7859 | { |
| 7860 | // If we are generating a shared object or a pie, this |
| 7861 | // symbol's GOT entry will be set by a dynamic relocation. |
| 7862 | unsigned int off; |
| 7863 | off = got->add_constant(0); |
| 7864 | object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); |
| 7865 | |
| 7866 | Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout, |
| 7867 | is_ifunc); |
| 7868 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
| 7869 | : elfcpp::R_POWERPC_RELATIVE); |
| 7870 | rela_dyn->add_local_relative(object, r_sym, dynrel, |
| 7871 | got, off, 0, false); |
| 7872 | } |
| 7873 | } |
| 7874 | break; |
| 7875 | |
| 7876 | case elfcpp::R_PPC64_TOC16: |
| 7877 | case elfcpp::R_PPC64_TOC16_LO: |
| 7878 | case elfcpp::R_PPC64_TOC16_HI: |
| 7879 | case elfcpp::R_PPC64_TOC16_HA: |
| 7880 | case elfcpp::R_PPC64_TOC16_DS: |
| 7881 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 7882 | // We need a GOT section. |
| 7883 | target->got_section(symtab, layout); |
| 7884 | break; |
| 7885 | |
| 7886 | case elfcpp::R_PPC64_GOT_TLSGD34: |
| 7887 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
| 7888 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: |
| 7889 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: |
| 7890 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: |
| 7891 | { |
| 7892 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(true); |
| 7893 | if (tls_type == tls::TLSOPT_NONE) |
| 7894 | { |
| 7895 | Output_data_got_powerpc<size, big_endian>* got |
| 7896 | = target->got_section(symtab, layout); |
| 7897 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7898 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 7899 | got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD, |
| 7900 | rela_dyn, elfcpp::R_POWERPC_DTPMOD); |
| 7901 | } |
| 7902 | else if (tls_type == tls::TLSOPT_TO_LE) |
| 7903 | { |
| 7904 | // no GOT relocs needed for Local Exec. |
| 7905 | } |
| 7906 | else |
| 7907 | gold_unreachable(); |
| 7908 | } |
| 7909 | break; |
| 7910 | |
| 7911 | case elfcpp::R_PPC64_GOT_TLSLD34: |
| 7912 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
| 7913 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: |
| 7914 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: |
| 7915 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
| 7916 | { |
| 7917 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
| 7918 | if (tls_type == tls::TLSOPT_NONE) |
| 7919 | target->tlsld_got_offset(symtab, layout, object); |
| 7920 | else if (tls_type == tls::TLSOPT_TO_LE) |
| 7921 | { |
| 7922 | // no GOT relocs needed for Local Exec. |
| 7923 | if (parameters->options().emit_relocs()) |
| 7924 | { |
| 7925 | Output_section* os = layout->tls_segment()->first_section(); |
| 7926 | gold_assert(os != NULL); |
| 7927 | os->set_needs_symtab_index(); |
| 7928 | } |
| 7929 | } |
| 7930 | else |
| 7931 | gold_unreachable(); |
| 7932 | } |
| 7933 | break; |
| 7934 | |
| 7935 | case elfcpp::R_PPC64_GOT_DTPREL34: |
| 7936 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
| 7937 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: |
| 7938 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: |
| 7939 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: |
| 7940 | { |
| 7941 | Output_data_got_powerpc<size, big_endian>* got |
| 7942 | = target->got_section(symtab, layout); |
| 7943 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7944 | got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL); |
| 7945 | } |
| 7946 | break; |
| 7947 | |
| 7948 | case elfcpp::R_PPC64_GOT_TPREL34: |
| 7949 | case elfcpp::R_POWERPC_GOT_TPREL16: |
| 7950 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: |
| 7951 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: |
| 7952 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: |
| 7953 | { |
| 7954 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(true); |
| 7955 | if (tls_type == tls::TLSOPT_NONE) |
| 7956 | { |
| 7957 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 7958 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)) |
| 7959 | { |
| 7960 | Output_data_got_powerpc<size, big_endian>* got |
| 7961 | = target->got_section(symtab, layout); |
| 7962 | unsigned int off = got->add_constant(0); |
| 7963 | object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off); |
| 7964 | |
| 7965 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 7966 | rela_dyn->add_symbolless_local_addend(object, r_sym, |
| 7967 | elfcpp::R_POWERPC_TPREL, |
| 7968 | got, off, 0); |
| 7969 | } |
| 7970 | } |
| 7971 | else if (tls_type == tls::TLSOPT_TO_LE) |
| 7972 | { |
| 7973 | // no GOT relocs needed for Local Exec. |
| 7974 | } |
| 7975 | else |
| 7976 | gold_unreachable(); |
| 7977 | } |
| 7978 | break; |
| 7979 | |
| 7980 | default: |
| 7981 | unsupported_reloc_local(object, r_type); |
| 7982 | break; |
| 7983 | } |
| 7984 | |
| 7985 | if (size == 64 |
| 7986 | && parameters->options().toc_optimize()) |
| 7987 | { |
| 7988 | if (data_shndx == ppc_object->toc_shndx()) |
| 7989 | { |
| 7990 | bool ok = true; |
| 7991 | if (r_type != elfcpp::R_PPC64_ADDR64 |
| 7992 | || (is_ifunc && target->abiversion() < 2)) |
| 7993 | ok = false; |
| 7994 | else if (parameters->options().output_is_position_independent()) |
| 7995 | { |
| 7996 | if (is_ifunc) |
| 7997 | ok = false; |
| 7998 | else |
| 7999 | { |
| 8000 | unsigned int shndx = lsym.get_st_shndx(); |
| 8001 | if (shndx >= elfcpp::SHN_LORESERVE |
| 8002 | && shndx != elfcpp::SHN_XINDEX) |
| 8003 | ok = false; |
| 8004 | } |
| 8005 | } |
| 8006 | if (!ok) |
| 8007 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); |
| 8008 | } |
| 8009 | |
| 8010 | enum {no_check, check_lo, check_ha} insn_check; |
| 8011 | switch (r_type) |
| 8012 | { |
| 8013 | default: |
| 8014 | insn_check = no_check; |
| 8015 | break; |
| 8016 | |
| 8017 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
| 8018 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: |
| 8019 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: |
| 8020 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: |
| 8021 | case elfcpp::R_POWERPC_GOT16_HA: |
| 8022 | case elfcpp::R_PPC64_TOC16_HA: |
| 8023 | insn_check = check_ha; |
| 8024 | break; |
| 8025 | |
| 8026 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: |
| 8027 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: |
| 8028 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: |
| 8029 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: |
| 8030 | case elfcpp::R_POWERPC_GOT16_LO: |
| 8031 | case elfcpp::R_PPC64_GOT16_LO_DS: |
| 8032 | case elfcpp::R_PPC64_TOC16_LO: |
| 8033 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 8034 | insn_check = check_lo; |
| 8035 | break; |
| 8036 | } |
| 8037 | |
| 8038 | section_size_type slen; |
| 8039 | const unsigned char* view = NULL; |
| 8040 | if (insn_check != no_check) |
| 8041 | { |
| 8042 | view = ppc_object->section_contents(data_shndx, &slen, false); |
| 8043 | section_size_type off = |
| 8044 | convert_to_section_size_type(reloc.get_r_offset()) & -4; |
| 8045 | if (off < slen) |
| 8046 | { |
| 8047 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); |
| 8048 | if (insn_check == check_lo |
| 8049 | ? !ok_lo_toc_insn(insn, r_type) |
| 8050 | : ((insn & ((0x3f << 26) | 0x1f << 16)) |
| 8051 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) |
| 8052 | { |
| 8053 | ppc_object->set_no_toc_opt(); |
| 8054 | gold_warning(_("%s: toc optimization is not supported " |
| 8055 | "for %#08x instruction"), |
| 8056 | ppc_object->name().c_str(), insn); |
| 8057 | } |
| 8058 | } |
| 8059 | } |
| 8060 | |
| 8061 | switch (r_type) |
| 8062 | { |
| 8063 | default: |
| 8064 | break; |
| 8065 | case elfcpp::R_PPC64_TOC16: |
| 8066 | case elfcpp::R_PPC64_TOC16_LO: |
| 8067 | case elfcpp::R_PPC64_TOC16_HI: |
| 8068 | case elfcpp::R_PPC64_TOC16_HA: |
| 8069 | case elfcpp::R_PPC64_TOC16_DS: |
| 8070 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 8071 | unsigned int shndx = lsym.get_st_shndx(); |
| 8072 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 8073 | bool is_ordinary; |
| 8074 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); |
| 8075 | if (is_ordinary && shndx == ppc_object->toc_shndx()) |
| 8076 | { |
| 8077 | Address dst_off = lsym.get_st_value() + reloc.get_r_addend(); |
| 8078 | if (dst_off < ppc_object->section_size(shndx)) |
| 8079 | { |
| 8080 | bool ok = false; |
| 8081 | if (r_type == elfcpp::R_PPC64_TOC16_HA) |
| 8082 | ok = true; |
| 8083 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) |
| 8084 | { |
| 8085 | // Need to check that the insn is a ld |
| 8086 | if (!view) |
| 8087 | view = ppc_object->section_contents(data_shndx, |
| 8088 | &slen, |
| 8089 | false); |
| 8090 | section_size_type off = |
| 8091 | (convert_to_section_size_type(reloc.get_r_offset()) |
| 8092 | + (big_endian ? -2 : 3)); |
| 8093 | if (off < slen |
| 8094 | && (view[off] & (0x3f << 2)) == 58u << 2) |
| 8095 | ok = true; |
| 8096 | } |
| 8097 | if (!ok) |
| 8098 | ppc_object->set_no_toc_opt(dst_off); |
| 8099 | } |
| 8100 | } |
| 8101 | break; |
| 8102 | } |
| 8103 | } |
| 8104 | |
| 8105 | if (size == 32) |
| 8106 | { |
| 8107 | switch (r_type) |
| 8108 | { |
| 8109 | case elfcpp::R_POWERPC_REL32: |
| 8110 | if (ppc_object->got2_shndx() != 0 |
| 8111 | && parameters->options().output_is_position_independent()) |
| 8112 | { |
| 8113 | unsigned int shndx = lsym.get_st_shndx(); |
| 8114 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 8115 | bool is_ordinary; |
| 8116 | shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); |
| 8117 | if (is_ordinary && shndx == ppc_object->got2_shndx() |
| 8118 | && (ppc_object->section_flags(data_shndx) |
| 8119 | & elfcpp::SHF_EXECINSTR) != 0) |
| 8120 | gold_error(_("%s: unsupported -mbss-plt code"), |
| 8121 | ppc_object->name().c_str()); |
| 8122 | } |
| 8123 | break; |
| 8124 | default: |
| 8125 | break; |
| 8126 | } |
| 8127 | } |
| 8128 | |
| 8129 | switch (r_type) |
| 8130 | { |
| 8131 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
| 8132 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
| 8133 | case elfcpp::R_POWERPC_GOT_TPREL16: |
| 8134 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
| 8135 | case elfcpp::R_POWERPC_GOT16: |
| 8136 | case elfcpp::R_PPC64_GOT16_DS: |
| 8137 | case elfcpp::R_PPC64_TOC16: |
| 8138 | case elfcpp::R_PPC64_TOC16_DS: |
| 8139 | ppc_object->set_has_small_toc_reloc(); |
| 8140 | break; |
| 8141 | default: |
| 8142 | break; |
| 8143 | } |
| 8144 | |
| 8145 | switch (r_type) |
| 8146 | { |
| 8147 | case elfcpp::R_POWERPC_TPREL16: |
| 8148 | case elfcpp::R_POWERPC_TPREL16_LO: |
| 8149 | case elfcpp::R_POWERPC_TPREL16_HI: |
| 8150 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 8151 | case elfcpp::R_PPC64_TPREL16_DS: |
| 8152 | case elfcpp::R_PPC64_TPREL16_LO_DS: |
| 8153 | case elfcpp::R_PPC64_TPREL16_HIGH: |
| 8154 | case elfcpp::R_PPC64_TPREL16_HIGHA: |
| 8155 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
| 8156 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
| 8157 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
| 8158 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
| 8159 | case elfcpp::R_PPC64_TPREL34: |
| 8160 | layout->set_has_static_tls(); |
| 8161 | break; |
| 8162 | default: |
| 8163 | break; |
| 8164 | } |
| 8165 | |
| 8166 | switch (r_type) |
| 8167 | { |
| 8168 | case elfcpp::R_PPC64_D34: |
| 8169 | case elfcpp::R_PPC64_D34_LO: |
| 8170 | case elfcpp::R_PPC64_D34_HI30: |
| 8171 | case elfcpp::R_PPC64_D34_HA30: |
| 8172 | case elfcpp::R_PPC64_D28: |
| 8173 | case elfcpp::R_PPC64_PCREL34: |
| 8174 | case elfcpp::R_PPC64_PCREL28: |
| 8175 | case elfcpp::R_PPC64_TPREL34: |
| 8176 | case elfcpp::R_PPC64_DTPREL34: |
| 8177 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 8178 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 8179 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 8180 | case elfcpp::R_PPC64_GOT_TLSGD34: |
| 8181 | case elfcpp::R_PPC64_GOT_TLSLD34: |
| 8182 | case elfcpp::R_PPC64_GOT_DTPREL34: |
| 8183 | case elfcpp::R_PPC64_GOT_TPREL34: |
| 8184 | target->set_powerxx_stubs(); |
| 8185 | break; |
| 8186 | default: |
| 8187 | break; |
| 8188 | } |
| 8189 | } |
| 8190 | |
| 8191 | // Report an unsupported relocation against a global symbol. |
| 8192 | |
| 8193 | template<int size, bool big_endian> |
| 8194 | void |
| 8195 | Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global( |
| 8196 | Sized_relobj_file<size, big_endian>* object, |
| 8197 | unsigned int r_type, |
| 8198 | Symbol* gsym) |
| 8199 | { |
| 8200 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
| 8201 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); |
| 8202 | } |
| 8203 | |
| 8204 | // Scan a relocation for a global symbol. |
| 8205 | |
| 8206 | template<int size, bool big_endian> |
| 8207 | inline void |
| 8208 | Target_powerpc<size, big_endian>::Scan::global( |
| 8209 | Symbol_table* symtab, |
| 8210 | Layout* layout, |
| 8211 | Target_powerpc<size, big_endian>* target, |
| 8212 | Sized_relobj_file<size, big_endian>* object, |
| 8213 | unsigned int data_shndx, |
| 8214 | Output_section* output_section, |
| 8215 | const elfcpp::Rela<size, big_endian>& reloc, |
| 8216 | unsigned int r_type, |
| 8217 | Symbol* gsym) |
| 8218 | { |
| 8219 | if (this->maybe_skip_tls_get_addr_call(target, r_type, gsym) |
| 8220 | == Track_tls::SKIP) |
| 8221 | return; |
| 8222 | |
| 8223 | if (target->replace_tls_get_addr(gsym)) |
| 8224 | // Change a __tls_get_addr reference to __tls_get_addr_opt |
| 8225 | // so dynamic relocs are emitted against the latter symbol. |
| 8226 | gsym = target->tls_get_addr_opt(); |
| 8227 | |
| 8228 | if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) |
| 8229 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) |
| 8230 | { |
| 8231 | this->expect_tls_get_addr_call(); |
| 8232 | const bool final = gsym->final_value_is_known(); |
| 8233 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); |
| 8234 | if (tls_type != tls::TLSOPT_NONE) |
| 8235 | this->skip_next_tls_get_addr_call(); |
| 8236 | } |
| 8237 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) |
| 8238 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) |
| 8239 | { |
| 8240 | this->expect_tls_get_addr_call(); |
| 8241 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
| 8242 | if (tls_type != tls::TLSOPT_NONE) |
| 8243 | this->skip_next_tls_get_addr_call(); |
| 8244 | } |
| 8245 | |
| 8246 | Powerpc_relobj<size, big_endian>* ppc_object |
| 8247 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); |
| 8248 | |
| 8249 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
| 8250 | bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
| 8251 | bool pushed_ifunc = false; |
| 8252 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true)) |
| 8253 | { |
| 8254 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 8255 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
| 8256 | r_type, r_sym, reloc.get_r_addend()); |
| 8257 | target->make_plt_entry(symtab, layout, gsym); |
| 8258 | pushed_ifunc = true; |
| 8259 | } |
| 8260 | |
| 8261 | switch (r_type) |
| 8262 | { |
| 8263 | case elfcpp::R_POWERPC_NONE: |
| 8264 | case elfcpp::R_POWERPC_GNU_VTINHERIT: |
| 8265 | case elfcpp::R_POWERPC_GNU_VTENTRY: |
| 8266 | case elfcpp::R_PPC_LOCAL24PC: |
| 8267 | case elfcpp::R_POWERPC_TLS: |
| 8268 | case elfcpp::R_PPC64_ENTRY: |
| 8269 | case elfcpp::R_POWERPC_PLTSEQ: |
| 8270 | case elfcpp::R_POWERPC_PLTCALL: |
| 8271 | case elfcpp::R_PPC64_PLTSEQ_NOTOC: |
| 8272 | case elfcpp::R_PPC64_PLTCALL_NOTOC: |
| 8273 | case elfcpp::R_PPC64_PCREL_OPT: |
| 8274 | case elfcpp::R_PPC64_ADDR16_HIGHER34: |
| 8275 | case elfcpp::R_PPC64_ADDR16_HIGHERA34: |
| 8276 | case elfcpp::R_PPC64_ADDR16_HIGHEST34: |
| 8277 | case elfcpp::R_PPC64_ADDR16_HIGHESTA34: |
| 8278 | case elfcpp::R_PPC64_REL16_HIGHER34: |
| 8279 | case elfcpp::R_PPC64_REL16_HIGHERA34: |
| 8280 | case elfcpp::R_PPC64_REL16_HIGHEST34: |
| 8281 | case elfcpp::R_PPC64_REL16_HIGHESTA34: |
| 8282 | case elfcpp::R_PPC64_D34: |
| 8283 | case elfcpp::R_PPC64_D34_LO: |
| 8284 | case elfcpp::R_PPC64_D34_HI30: |
| 8285 | case elfcpp::R_PPC64_D34_HA30: |
| 8286 | case elfcpp::R_PPC64_D28: |
| 8287 | case elfcpp::R_PPC64_PCREL34: |
| 8288 | case elfcpp::R_PPC64_PCREL28: |
| 8289 | case elfcpp::R_PPC64_TPREL34: |
| 8290 | case elfcpp::R_PPC64_DTPREL34: |
| 8291 | break; |
| 8292 | |
| 8293 | case elfcpp::R_PPC64_TOC: |
| 8294 | { |
| 8295 | Output_data_got_powerpc<size, big_endian>* got |
| 8296 | = target->got_section(symtab, layout); |
| 8297 | if (parameters->options().output_is_position_independent()) |
| 8298 | { |
| 8299 | Address off = reloc.get_r_offset(); |
| 8300 | if (size == 64 |
| 8301 | && data_shndx == ppc_object->opd_shndx() |
| 8302 | && ppc_object->get_opd_discard(off - 8)) |
| 8303 | break; |
| 8304 | |
| 8305 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 8306 | Powerpc_relobj<size, big_endian>* symobj = ppc_object; |
| 8307 | if (data_shndx != ppc_object->opd_shndx()) |
| 8308 | symobj = static_cast |
| 8309 | <Powerpc_relobj<size, big_endian>*>(gsym->object()); |
| 8310 | rela_dyn->add_output_section_relative(got->output_section(), |
| 8311 | elfcpp::R_POWERPC_RELATIVE, |
| 8312 | output_section, |
| 8313 | object, data_shndx, off, |
| 8314 | symobj->toc_base_offset()); |
| 8315 | } |
| 8316 | } |
| 8317 | break; |
| 8318 | |
| 8319 | case elfcpp::R_PPC64_ADDR64: |
| 8320 | if (size == 64 |
| 8321 | && target->abiversion() < 2 |
| 8322 | && data_shndx == ppc_object->opd_shndx() |
| 8323 | && (gsym->is_defined_in_discarded_section() |
| 8324 | || gsym->object() != object)) |
| 8325 | { |
| 8326 | ppc_object->set_opd_discard(reloc.get_r_offset()); |
| 8327 | break; |
| 8328 | } |
| 8329 | // Fall through. |
| 8330 | case elfcpp::R_PPC64_UADDR64: |
| 8331 | case elfcpp::R_POWERPC_ADDR32: |
| 8332 | case elfcpp::R_POWERPC_UADDR32: |
| 8333 | case elfcpp::R_POWERPC_ADDR24: |
| 8334 | case elfcpp::R_POWERPC_ADDR16: |
| 8335 | case elfcpp::R_POWERPC_ADDR16_LO: |
| 8336 | case elfcpp::R_POWERPC_ADDR16_HI: |
| 8337 | case elfcpp::R_POWERPC_ADDR16_HA: |
| 8338 | case elfcpp::R_POWERPC_UADDR16: |
| 8339 | case elfcpp::R_PPC64_ADDR16_HIGH: |
| 8340 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
| 8341 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
| 8342 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
| 8343 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
| 8344 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
| 8345 | case elfcpp::R_PPC64_ADDR16_DS: |
| 8346 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
| 8347 | case elfcpp::R_POWERPC_ADDR14: |
| 8348 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
| 8349 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
| 8350 | { |
| 8351 | // Make a PLT entry if necessary. |
| 8352 | if (gsym->needs_plt_entry()) |
| 8353 | { |
| 8354 | // Since this is not a PC-relative relocation, we may be |
| 8355 | // taking the address of a function. In that case we need to |
| 8356 | // set the entry in the dynamic symbol table to the address of |
| 8357 | // the PLT call stub. |
| 8358 | bool need_ifunc_plt = false; |
| 8359 | if ((size == 32 || target->abiversion() >= 2) |
| 8360 | && gsym->is_from_dynobj() |
| 8361 | && !parameters->options().output_is_position_independent()) |
| 8362 | { |
| 8363 | gsym->set_needs_dynsym_value(); |
| 8364 | need_ifunc_plt = true; |
| 8365 | } |
| 8366 | if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt)) |
| 8367 | { |
| 8368 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 8369 | target->push_branch(ppc_object, data_shndx, |
| 8370 | reloc.get_r_offset(), r_type, r_sym, |
| 8371 | reloc.get_r_addend()); |
| 8372 | target->make_plt_entry(symtab, layout, gsym); |
| 8373 | } |
| 8374 | } |
| 8375 | // Make a dynamic relocation if necessary. |
| 8376 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)) |
| 8377 | || (size == 64 && is_ifunc && target->abiversion() < 2)) |
| 8378 | { |
| 8379 | if (!parameters->options().output_is_position_independent() |
| 8380 | && gsym->may_need_copy_reloc()) |
| 8381 | { |
| 8382 | target->copy_reloc(symtab, layout, object, |
| 8383 | data_shndx, output_section, gsym, reloc); |
| 8384 | } |
| 8385 | else if ((((size == 32 |
| 8386 | && r_type == elfcpp::R_POWERPC_ADDR32) |
| 8387 | || (size == 64 |
| 8388 | && r_type == elfcpp::R_PPC64_ADDR64 |
| 8389 | && target->abiversion() >= 2)) |
| 8390 | && gsym->can_use_relative_reloc(false) |
| 8391 | && !(gsym->visibility() == elfcpp::STV_PROTECTED |
| 8392 | && parameters->options().shared())) |
| 8393 | || (size == 64 |
| 8394 | && r_type == elfcpp::R_PPC64_ADDR64 |
| 8395 | && target->abiversion() < 2 |
| 8396 | && (gsym->can_use_relative_reloc(false) |
| 8397 | || data_shndx == ppc_object->opd_shndx()))) |
| 8398 | { |
| 8399 | Reloc_section* rela_dyn |
| 8400 | = target->rela_dyn_section(symtab, layout, is_ifunc); |
| 8401 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
| 8402 | : elfcpp::R_POWERPC_RELATIVE); |
| 8403 | rela_dyn->add_symbolless_global_addend( |
| 8404 | gsym, dynrel, output_section, object, data_shndx, |
| 8405 | reloc.get_r_offset(), reloc.get_r_addend()); |
| 8406 | } |
| 8407 | else |
| 8408 | { |
| 8409 | Reloc_section* rela_dyn |
| 8410 | = target->rela_dyn_section(symtab, layout, is_ifunc); |
| 8411 | check_non_pic(object, r_type); |
| 8412 | rela_dyn->add_global(gsym, r_type, output_section, |
| 8413 | object, data_shndx, |
| 8414 | reloc.get_r_offset(), |
| 8415 | reloc.get_r_addend()); |
| 8416 | |
| 8417 | if (size == 64 |
| 8418 | && parameters->options().toc_optimize() |
| 8419 | && data_shndx == ppc_object->toc_shndx()) |
| 8420 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); |
| 8421 | } |
| 8422 | } |
| 8423 | } |
| 8424 | break; |
| 8425 | |
| 8426 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 8427 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 8428 | case elfcpp::R_POWERPC_PLT16_LO: |
| 8429 | case elfcpp::R_POWERPC_PLT16_HI: |
| 8430 | case elfcpp::R_POWERPC_PLT16_HA: |
| 8431 | case elfcpp::R_PPC64_PLT16_LO_DS: |
| 8432 | if (!pushed_ifunc) |
| 8433 | target->make_plt_entry(symtab, layout, gsym); |
| 8434 | break; |
| 8435 | |
| 8436 | case elfcpp::R_PPC64_REL24_NOTOC: |
| 8437 | if (size == 32) |
| 8438 | break; |
| 8439 | // Fall through. |
| 8440 | case elfcpp::R_PPC_PLTREL24: |
| 8441 | case elfcpp::R_POWERPC_REL24: |
| 8442 | if (!is_ifunc) |
| 8443 | { |
| 8444 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 8445 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
| 8446 | r_type, r_sym, reloc.get_r_addend()); |
| 8447 | if (gsym->needs_plt_entry() |
| 8448 | || (!gsym->final_value_is_known() |
| 8449 | && (gsym->is_undefined() |
| 8450 | || gsym->is_from_dynobj() |
| 8451 | || gsym->is_preemptible()))) |
| 8452 | target->make_plt_entry(symtab, layout, gsym); |
| 8453 | } |
| 8454 | // Fall through. |
| 8455 | |
| 8456 | case elfcpp::R_PPC64_REL64: |
| 8457 | case elfcpp::R_POWERPC_REL32: |
| 8458 | // Make a dynamic relocation if necessary. |
| 8459 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))) |
| 8460 | { |
| 8461 | if (!parameters->options().output_is_position_independent() |
| 8462 | && gsym->may_need_copy_reloc()) |
| 8463 | { |
| 8464 | target->copy_reloc(symtab, layout, object, |
| 8465 | data_shndx, output_section, gsym, |
| 8466 | reloc); |
| 8467 | } |
| 8468 | else |
| 8469 | { |
| 8470 | Reloc_section* rela_dyn |
| 8471 | = target->rela_dyn_section(symtab, layout, is_ifunc); |
| 8472 | check_non_pic(object, r_type); |
| 8473 | rela_dyn->add_global(gsym, r_type, output_section, object, |
| 8474 | data_shndx, reloc.get_r_offset(), |
| 8475 | reloc.get_r_addend()); |
| 8476 | } |
| 8477 | } |
| 8478 | break; |
| 8479 | |
| 8480 | case elfcpp::R_POWERPC_REL14: |
| 8481 | case elfcpp::R_POWERPC_REL14_BRTAKEN: |
| 8482 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: |
| 8483 | if (!is_ifunc) |
| 8484 | { |
| 8485 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 8486 | target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(), |
| 8487 | r_type, r_sym, reloc.get_r_addend()); |
| 8488 | } |
| 8489 | break; |
| 8490 | |
| 8491 | case elfcpp::R_PPC64_TOCSAVE: |
| 8492 | // R_PPC64_TOCSAVE follows a call instruction to indicate the |
| 8493 | // caller has already saved r2 and thus a plt call stub need not |
| 8494 | // save r2. |
| 8495 | if (size == 64 |
| 8496 | && target->mark_pltcall(ppc_object, data_shndx, |
| 8497 | reloc.get_r_offset() - 4, symtab)) |
| 8498 | { |
| 8499 | unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| 8500 | bool is_ordinary; |
| 8501 | unsigned int shndx = gsym->shndx(&is_ordinary); |
| 8502 | if (!is_ordinary) |
| 8503 | object->error(_("tocsave symbol %u has bad shndx %u"), |
| 8504 | r_sym, shndx); |
| 8505 | else |
| 8506 | { |
| 8507 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); |
| 8508 | target->add_tocsave(ppc_object, shndx, |
| 8509 | sym->value() + reloc.get_r_addend()); |
| 8510 | } |
| 8511 | } |
| 8512 | break; |
| 8513 | |
| 8514 | case elfcpp::R_POWERPC_REL16: |
| 8515 | case elfcpp::R_POWERPC_REL16_LO: |
| 8516 | case elfcpp::R_POWERPC_REL16_HI: |
| 8517 | case elfcpp::R_POWERPC_REL16_HA: |
| 8518 | case elfcpp::R_POWERPC_REL16DX_HA: |
| 8519 | case elfcpp::R_PPC64_REL16_HIGH: |
| 8520 | case elfcpp::R_PPC64_REL16_HIGHA: |
| 8521 | case elfcpp::R_PPC64_REL16_HIGHER: |
| 8522 | case elfcpp::R_PPC64_REL16_HIGHERA: |
| 8523 | case elfcpp::R_PPC64_REL16_HIGHEST: |
| 8524 | case elfcpp::R_PPC64_REL16_HIGHESTA: |
| 8525 | case elfcpp::R_POWERPC_SECTOFF: |
| 8526 | case elfcpp::R_POWERPC_SECTOFF_LO: |
| 8527 | case elfcpp::R_POWERPC_SECTOFF_HI: |
| 8528 | case elfcpp::R_POWERPC_SECTOFF_HA: |
| 8529 | case elfcpp::R_PPC64_SECTOFF_DS: |
| 8530 | case elfcpp::R_PPC64_SECTOFF_LO_DS: |
| 8531 | case elfcpp::R_POWERPC_TPREL16: |
| 8532 | case elfcpp::R_POWERPC_TPREL16_LO: |
| 8533 | case elfcpp::R_POWERPC_TPREL16_HI: |
| 8534 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 8535 | case elfcpp::R_PPC64_TPREL16_DS: |
| 8536 | case elfcpp::R_PPC64_TPREL16_LO_DS: |
| 8537 | case elfcpp::R_PPC64_TPREL16_HIGH: |
| 8538 | case elfcpp::R_PPC64_TPREL16_HIGHA: |
| 8539 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
| 8540 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
| 8541 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
| 8542 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
| 8543 | case elfcpp::R_POWERPC_DTPREL16: |
| 8544 | case elfcpp::R_POWERPC_DTPREL16_LO: |
| 8545 | case elfcpp::R_POWERPC_DTPREL16_HI: |
| 8546 | case elfcpp::R_POWERPC_DTPREL16_HA: |
| 8547 | case elfcpp::R_PPC64_DTPREL16_DS: |
| 8548 | case elfcpp::R_PPC64_DTPREL16_LO_DS: |
| 8549 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
| 8550 | case elfcpp::R_PPC64_DTPREL16_HIGHA: |
| 8551 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
| 8552 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
| 8553 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
| 8554 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
| 8555 | case elfcpp::R_PPC64_TLSGD: |
| 8556 | case elfcpp::R_PPC64_TLSLD: |
| 8557 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
| 8558 | break; |
| 8559 | |
| 8560 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 8561 | case elfcpp::R_POWERPC_GOT16: |
| 8562 | case elfcpp::R_POWERPC_GOT16_LO: |
| 8563 | case elfcpp::R_POWERPC_GOT16_HI: |
| 8564 | case elfcpp::R_POWERPC_GOT16_HA: |
| 8565 | case elfcpp::R_PPC64_GOT16_DS: |
| 8566 | case elfcpp::R_PPC64_GOT16_LO_DS: |
| 8567 | { |
| 8568 | // The symbol requires a GOT entry. |
| 8569 | Output_data_got_powerpc<size, big_endian>* got; |
| 8570 | |
| 8571 | got = target->got_section(symtab, layout); |
| 8572 | if (gsym->final_value_is_known()) |
| 8573 | { |
| 8574 | if (is_ifunc |
| 8575 | && (size == 32 || target->abiversion() >= 2)) |
| 8576 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
| 8577 | else |
| 8578 | got->add_global(gsym, GOT_TYPE_STANDARD); |
| 8579 | } |
| 8580 | else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) |
| 8581 | { |
| 8582 | // If we are generating a shared object or a pie, this |
| 8583 | // symbol's GOT entry will be set by a dynamic relocation. |
| 8584 | unsigned int off = got->add_constant(0); |
| 8585 | gsym->set_got_offset(GOT_TYPE_STANDARD, off); |
| 8586 | |
| 8587 | Reloc_section* rela_dyn |
| 8588 | = target->rela_dyn_section(symtab, layout, is_ifunc); |
| 8589 | |
| 8590 | if (gsym->can_use_relative_reloc(false) |
| 8591 | && !((size == 32 |
| 8592 | || target->abiversion() >= 2) |
| 8593 | && gsym->visibility() == elfcpp::STV_PROTECTED |
| 8594 | && parameters->options().shared())) |
| 8595 | { |
| 8596 | unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE |
| 8597 | : elfcpp::R_POWERPC_RELATIVE); |
| 8598 | rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false); |
| 8599 | } |
| 8600 | else |
| 8601 | { |
| 8602 | unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT; |
| 8603 | rela_dyn->add_global(gsym, dynrel, got, off, 0); |
| 8604 | } |
| 8605 | } |
| 8606 | } |
| 8607 | break; |
| 8608 | |
| 8609 | case elfcpp::R_PPC64_TOC16: |
| 8610 | case elfcpp::R_PPC64_TOC16_LO: |
| 8611 | case elfcpp::R_PPC64_TOC16_HI: |
| 8612 | case elfcpp::R_PPC64_TOC16_HA: |
| 8613 | case elfcpp::R_PPC64_TOC16_DS: |
| 8614 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 8615 | // We need a GOT section. |
| 8616 | target->got_section(symtab, layout); |
| 8617 | break; |
| 8618 | |
| 8619 | case elfcpp::R_PPC64_GOT_TLSGD34: |
| 8620 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
| 8621 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: |
| 8622 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: |
| 8623 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: |
| 8624 | { |
| 8625 | const bool final = gsym->final_value_is_known(); |
| 8626 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); |
| 8627 | if (tls_type == tls::TLSOPT_NONE) |
| 8628 | { |
| 8629 | Output_data_got_powerpc<size, big_endian>* got |
| 8630 | = target->got_section(symtab, layout); |
| 8631 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 8632 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn, |
| 8633 | elfcpp::R_POWERPC_DTPMOD, |
| 8634 | elfcpp::R_POWERPC_DTPREL); |
| 8635 | } |
| 8636 | else if (tls_type == tls::TLSOPT_TO_IE) |
| 8637 | { |
| 8638 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
| 8639 | { |
| 8640 | Output_data_got_powerpc<size, big_endian>* got |
| 8641 | = target->got_section(symtab, layout); |
| 8642 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 8643 | if (gsym->is_undefined() |
| 8644 | || gsym->is_from_dynobj()) |
| 8645 | { |
| 8646 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, |
| 8647 | elfcpp::R_POWERPC_TPREL); |
| 8648 | } |
| 8649 | else |
| 8650 | { |
| 8651 | unsigned int off = got->add_constant(0); |
| 8652 | gsym->set_got_offset(GOT_TYPE_TPREL, off); |
| 8653 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; |
| 8654 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, |
| 8655 | got, off, 0); |
| 8656 | } |
| 8657 | } |
| 8658 | } |
| 8659 | else if (tls_type == tls::TLSOPT_TO_LE) |
| 8660 | { |
| 8661 | // no GOT relocs needed for Local Exec. |
| 8662 | } |
| 8663 | else |
| 8664 | gold_unreachable(); |
| 8665 | } |
| 8666 | break; |
| 8667 | |
| 8668 | case elfcpp::R_PPC64_GOT_TLSLD34: |
| 8669 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
| 8670 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: |
| 8671 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: |
| 8672 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
| 8673 | { |
| 8674 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
| 8675 | if (tls_type == tls::TLSOPT_NONE) |
| 8676 | target->tlsld_got_offset(symtab, layout, object); |
| 8677 | else if (tls_type == tls::TLSOPT_TO_LE) |
| 8678 | { |
| 8679 | // no GOT relocs needed for Local Exec. |
| 8680 | if (parameters->options().emit_relocs()) |
| 8681 | { |
| 8682 | Output_section* os = layout->tls_segment()->first_section(); |
| 8683 | gold_assert(os != NULL); |
| 8684 | os->set_needs_symtab_index(); |
| 8685 | } |
| 8686 | } |
| 8687 | else |
| 8688 | gold_unreachable(); |
| 8689 | } |
| 8690 | break; |
| 8691 | |
| 8692 | case elfcpp::R_PPC64_GOT_DTPREL34: |
| 8693 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
| 8694 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: |
| 8695 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: |
| 8696 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: |
| 8697 | { |
| 8698 | Output_data_got_powerpc<size, big_endian>* got |
| 8699 | = target->got_section(symtab, layout); |
| 8700 | if (!gsym->final_value_is_known() |
| 8701 | && (gsym->is_from_dynobj() |
| 8702 | || gsym->is_undefined() |
| 8703 | || gsym->is_preemptible())) |
| 8704 | got->add_global_with_rel(gsym, GOT_TYPE_DTPREL, |
| 8705 | target->rela_dyn_section(layout), |
| 8706 | elfcpp::R_POWERPC_DTPREL); |
| 8707 | else |
| 8708 | got->add_global_tls(gsym, GOT_TYPE_DTPREL); |
| 8709 | } |
| 8710 | break; |
| 8711 | |
| 8712 | case elfcpp::R_PPC64_GOT_TPREL34: |
| 8713 | case elfcpp::R_POWERPC_GOT_TPREL16: |
| 8714 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: |
| 8715 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: |
| 8716 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: |
| 8717 | { |
| 8718 | const bool final = gsym->final_value_is_known(); |
| 8719 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); |
| 8720 | if (tls_type == tls::TLSOPT_NONE) |
| 8721 | { |
| 8722 | if (!gsym->has_got_offset(GOT_TYPE_TPREL)) |
| 8723 | { |
| 8724 | Output_data_got_powerpc<size, big_endian>* got |
| 8725 | = target->got_section(symtab, layout); |
| 8726 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| 8727 | if (gsym->is_undefined() |
| 8728 | || gsym->is_from_dynobj()) |
| 8729 | { |
| 8730 | got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn, |
| 8731 | elfcpp::R_POWERPC_TPREL); |
| 8732 | } |
| 8733 | else |
| 8734 | { |
| 8735 | unsigned int off = got->add_constant(0); |
| 8736 | gsym->set_got_offset(GOT_TYPE_TPREL, off); |
| 8737 | unsigned int dynrel = elfcpp::R_POWERPC_TPREL; |
| 8738 | rela_dyn->add_symbolless_global_addend(gsym, dynrel, |
| 8739 | got, off, 0); |
| 8740 | } |
| 8741 | } |
| 8742 | } |
| 8743 | else if (tls_type == tls::TLSOPT_TO_LE) |
| 8744 | { |
| 8745 | // no GOT relocs needed for Local Exec. |
| 8746 | } |
| 8747 | else |
| 8748 | gold_unreachable(); |
| 8749 | } |
| 8750 | break; |
| 8751 | |
| 8752 | default: |
| 8753 | unsupported_reloc_global(object, r_type, gsym); |
| 8754 | break; |
| 8755 | } |
| 8756 | |
| 8757 | if (size == 64 |
| 8758 | && parameters->options().toc_optimize()) |
| 8759 | { |
| 8760 | if (data_shndx == ppc_object->toc_shndx()) |
| 8761 | { |
| 8762 | bool ok = true; |
| 8763 | if (r_type != elfcpp::R_PPC64_ADDR64 |
| 8764 | || (is_ifunc && target->abiversion() < 2)) |
| 8765 | ok = false; |
| 8766 | else if (parameters->options().output_is_position_independent() |
| 8767 | && (is_ifunc || gsym->is_absolute() || gsym->is_undefined())) |
| 8768 | ok = false; |
| 8769 | if (!ok) |
| 8770 | ppc_object->set_no_toc_opt(reloc.get_r_offset()); |
| 8771 | } |
| 8772 | |
| 8773 | enum {no_check, check_lo, check_ha} insn_check; |
| 8774 | switch (r_type) |
| 8775 | { |
| 8776 | default: |
| 8777 | insn_check = no_check; |
| 8778 | break; |
| 8779 | |
| 8780 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
| 8781 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: |
| 8782 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: |
| 8783 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: |
| 8784 | case elfcpp::R_POWERPC_GOT16_HA: |
| 8785 | case elfcpp::R_PPC64_TOC16_HA: |
| 8786 | insn_check = check_ha; |
| 8787 | break; |
| 8788 | |
| 8789 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: |
| 8790 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: |
| 8791 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: |
| 8792 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: |
| 8793 | case elfcpp::R_POWERPC_GOT16_LO: |
| 8794 | case elfcpp::R_PPC64_GOT16_LO_DS: |
| 8795 | case elfcpp::R_PPC64_TOC16_LO: |
| 8796 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 8797 | insn_check = check_lo; |
| 8798 | break; |
| 8799 | } |
| 8800 | |
| 8801 | section_size_type slen; |
| 8802 | const unsigned char* view = NULL; |
| 8803 | if (insn_check != no_check) |
| 8804 | { |
| 8805 | view = ppc_object->section_contents(data_shndx, &slen, false); |
| 8806 | section_size_type off = |
| 8807 | convert_to_section_size_type(reloc.get_r_offset()) & -4; |
| 8808 | if (off < slen) |
| 8809 | { |
| 8810 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off); |
| 8811 | if (insn_check == check_lo |
| 8812 | ? !ok_lo_toc_insn(insn, r_type) |
| 8813 | : ((insn & ((0x3f << 26) | 0x1f << 16)) |
| 8814 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) |
| 8815 | { |
| 8816 | ppc_object->set_no_toc_opt(); |
| 8817 | gold_warning(_("%s: toc optimization is not supported " |
| 8818 | "for %#08x instruction"), |
| 8819 | ppc_object->name().c_str(), insn); |
| 8820 | } |
| 8821 | } |
| 8822 | } |
| 8823 | |
| 8824 | switch (r_type) |
| 8825 | { |
| 8826 | default: |
| 8827 | break; |
| 8828 | case elfcpp::R_PPC64_TOC16: |
| 8829 | case elfcpp::R_PPC64_TOC16_LO: |
| 8830 | case elfcpp::R_PPC64_TOC16_HI: |
| 8831 | case elfcpp::R_PPC64_TOC16_HA: |
| 8832 | case elfcpp::R_PPC64_TOC16_DS: |
| 8833 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 8834 | if (gsym->source() == Symbol::FROM_OBJECT |
| 8835 | && !gsym->object()->is_dynamic()) |
| 8836 | { |
| 8837 | Powerpc_relobj<size, big_endian>* sym_object |
| 8838 | = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); |
| 8839 | bool is_ordinary; |
| 8840 | unsigned int shndx = gsym->shndx(&is_ordinary); |
| 8841 | if (shndx == sym_object->toc_shndx()) |
| 8842 | { |
| 8843 | Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym); |
| 8844 | Address dst_off = sym->value() + reloc.get_r_addend(); |
| 8845 | if (dst_off < sym_object->section_size(shndx)) |
| 8846 | { |
| 8847 | bool ok = false; |
| 8848 | if (r_type == elfcpp::R_PPC64_TOC16_HA) |
| 8849 | ok = true; |
| 8850 | else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS) |
| 8851 | { |
| 8852 | // Need to check that the insn is a ld |
| 8853 | if (!view) |
| 8854 | view = ppc_object->section_contents(data_shndx, |
| 8855 | &slen, |
| 8856 | false); |
| 8857 | section_size_type off = |
| 8858 | (convert_to_section_size_type(reloc.get_r_offset()) |
| 8859 | + (big_endian ? -2 : 3)); |
| 8860 | if (off < slen |
| 8861 | && (view[off] & (0x3f << 2)) == (58u << 2)) |
| 8862 | ok = true; |
| 8863 | } |
| 8864 | if (!ok) |
| 8865 | sym_object->set_no_toc_opt(dst_off); |
| 8866 | } |
| 8867 | } |
| 8868 | } |
| 8869 | break; |
| 8870 | } |
| 8871 | } |
| 8872 | |
| 8873 | if (size == 32) |
| 8874 | { |
| 8875 | switch (r_type) |
| 8876 | { |
| 8877 | case elfcpp::R_PPC_LOCAL24PC: |
| 8878 | if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) |
| 8879 | gold_error(_("%s: unsupported -mbss-plt code"), |
| 8880 | ppc_object->name().c_str()); |
| 8881 | break; |
| 8882 | default: |
| 8883 | break; |
| 8884 | } |
| 8885 | } |
| 8886 | |
| 8887 | switch (r_type) |
| 8888 | { |
| 8889 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
| 8890 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
| 8891 | case elfcpp::R_POWERPC_GOT_TPREL16: |
| 8892 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
| 8893 | case elfcpp::R_POWERPC_GOT16: |
| 8894 | case elfcpp::R_PPC64_GOT16_DS: |
| 8895 | case elfcpp::R_PPC64_TOC16: |
| 8896 | case elfcpp::R_PPC64_TOC16_DS: |
| 8897 | ppc_object->set_has_small_toc_reloc(); |
| 8898 | break; |
| 8899 | default: |
| 8900 | break; |
| 8901 | } |
| 8902 | |
| 8903 | switch (r_type) |
| 8904 | { |
| 8905 | case elfcpp::R_POWERPC_TPREL16: |
| 8906 | case elfcpp::R_POWERPC_TPREL16_LO: |
| 8907 | case elfcpp::R_POWERPC_TPREL16_HI: |
| 8908 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 8909 | case elfcpp::R_PPC64_TPREL16_DS: |
| 8910 | case elfcpp::R_PPC64_TPREL16_LO_DS: |
| 8911 | case elfcpp::R_PPC64_TPREL16_HIGH: |
| 8912 | case elfcpp::R_PPC64_TPREL16_HIGHA: |
| 8913 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
| 8914 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
| 8915 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
| 8916 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
| 8917 | case elfcpp::R_PPC64_TPREL34: |
| 8918 | layout->set_has_static_tls(); |
| 8919 | break; |
| 8920 | default: |
| 8921 | break; |
| 8922 | } |
| 8923 | |
| 8924 | switch (r_type) |
| 8925 | { |
| 8926 | case elfcpp::R_PPC64_D34: |
| 8927 | case elfcpp::R_PPC64_D34_LO: |
| 8928 | case elfcpp::R_PPC64_D34_HI30: |
| 8929 | case elfcpp::R_PPC64_D34_HA30: |
| 8930 | case elfcpp::R_PPC64_D28: |
| 8931 | case elfcpp::R_PPC64_PCREL34: |
| 8932 | case elfcpp::R_PPC64_PCREL28: |
| 8933 | case elfcpp::R_PPC64_TPREL34: |
| 8934 | case elfcpp::R_PPC64_DTPREL34: |
| 8935 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 8936 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 8937 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 8938 | case elfcpp::R_PPC64_GOT_TLSGD34: |
| 8939 | case elfcpp::R_PPC64_GOT_TLSLD34: |
| 8940 | case elfcpp::R_PPC64_GOT_DTPREL34: |
| 8941 | case elfcpp::R_PPC64_GOT_TPREL34: |
| 8942 | target->set_powerxx_stubs(); |
| 8943 | break; |
| 8944 | default: |
| 8945 | break; |
| 8946 | } |
| 8947 | } |
| 8948 | |
| 8949 | // Process relocations for gc. |
| 8950 | |
| 8951 | template<int size, bool big_endian> |
| 8952 | void |
| 8953 | Target_powerpc<size, big_endian>::gc_process_relocs( |
| 8954 | Symbol_table* symtab, |
| 8955 | Layout* layout, |
| 8956 | Sized_relobj_file<size, big_endian>* object, |
| 8957 | unsigned int data_shndx, |
| 8958 | unsigned int, |
| 8959 | const unsigned char* prelocs, |
| 8960 | size_t reloc_count, |
| 8961 | Output_section* output_section, |
| 8962 | bool needs_special_offset_handling, |
| 8963 | size_t local_symbol_count, |
| 8964 | const unsigned char* plocal_symbols) |
| 8965 | { |
| 8966 | typedef Target_powerpc<size, big_endian> Powerpc; |
| 8967 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 8968 | Classify_reloc; |
| 8969 | |
| 8970 | Powerpc_relobj<size, big_endian>* ppc_object |
| 8971 | = static_cast<Powerpc_relobj<size, big_endian>*>(object); |
| 8972 | if (size == 64) |
| 8973 | ppc_object->set_opd_valid(); |
| 8974 | if (size == 64 && data_shndx == ppc_object->opd_shndx()) |
| 8975 | { |
| 8976 | typename Powerpc_relobj<size, big_endian>::Access_from::iterator p; |
| 8977 | for (p = ppc_object->access_from_map()->begin(); |
| 8978 | p != ppc_object->access_from_map()->end(); |
| 8979 | ++p) |
| 8980 | { |
| 8981 | Address dst_off = p->first; |
| 8982 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); |
| 8983 | typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s; |
| 8984 | for (s = p->second.begin(); s != p->second.end(); ++s) |
| 8985 | { |
| 8986 | Relobj* src_obj = s->first; |
| 8987 | unsigned int src_indx = s->second; |
| 8988 | symtab->gc()->add_reference(src_obj, src_indx, |
| 8989 | ppc_object, dst_indx); |
| 8990 | } |
| 8991 | p->second.clear(); |
| 8992 | } |
| 8993 | ppc_object->access_from_map()->clear(); |
| 8994 | ppc_object->process_gc_mark(symtab); |
| 8995 | // Don't look at .opd relocs as .opd will reference everything. |
| 8996 | return; |
| 8997 | } |
| 8998 | |
| 8999 | gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
| 9000 | symtab, |
| 9001 | layout, |
| 9002 | this, |
| 9003 | object, |
| 9004 | data_shndx, |
| 9005 | prelocs, |
| 9006 | reloc_count, |
| 9007 | output_section, |
| 9008 | needs_special_offset_handling, |
| 9009 | local_symbol_count, |
| 9010 | plocal_symbols); |
| 9011 | } |
| 9012 | |
| 9013 | // Handle target specific gc actions when adding a gc reference from |
| 9014 | // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX |
| 9015 | // and DST_OFF. For powerpc64, this adds a referenc to the code |
| 9016 | // section of a function descriptor. |
| 9017 | |
| 9018 | template<int size, bool big_endian> |
| 9019 | void |
| 9020 | Target_powerpc<size, big_endian>::do_gc_add_reference( |
| 9021 | Symbol_table* symtab, |
| 9022 | Relobj* src_obj, |
| 9023 | unsigned int src_shndx, |
| 9024 | Relobj* dst_obj, |
| 9025 | unsigned int dst_shndx, |
| 9026 | Address dst_off) const |
| 9027 | { |
| 9028 | if (size != 64 || dst_obj->is_dynamic()) |
| 9029 | return; |
| 9030 | |
| 9031 | Powerpc_relobj<size, big_endian>* ppc_object |
| 9032 | = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj); |
| 9033 | if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx()) |
| 9034 | { |
| 9035 | if (ppc_object->opd_valid()) |
| 9036 | { |
| 9037 | dst_shndx = ppc_object->get_opd_ent(dst_off); |
| 9038 | symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx); |
| 9039 | } |
| 9040 | else |
| 9041 | { |
| 9042 | // If we haven't run scan_opd_relocs, we must delay |
| 9043 | // processing this function descriptor reference. |
| 9044 | ppc_object->add_reference(src_obj, src_shndx, dst_off); |
| 9045 | } |
| 9046 | } |
| 9047 | } |
| 9048 | |
| 9049 | // Add any special sections for this symbol to the gc work list. |
| 9050 | // For powerpc64, this adds the code section of a function |
| 9051 | // descriptor. |
| 9052 | |
| 9053 | template<int size, bool big_endian> |
| 9054 | void |
| 9055 | Target_powerpc<size, big_endian>::do_gc_mark_symbol( |
| 9056 | Symbol_table* symtab, |
| 9057 | Symbol* sym) const |
| 9058 | { |
| 9059 | if (size == 64) |
| 9060 | { |
| 9061 | Powerpc_relobj<size, big_endian>* ppc_object |
| 9062 | = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object()); |
| 9063 | bool is_ordinary; |
| 9064 | unsigned int shndx = sym->shndx(&is_ordinary); |
| 9065 | if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx()) |
| 9066 | { |
| 9067 | Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym); |
| 9068 | Address dst_off = gsym->value(); |
| 9069 | if (ppc_object->opd_valid()) |
| 9070 | { |
| 9071 | unsigned int dst_indx = ppc_object->get_opd_ent(dst_off); |
| 9072 | symtab->gc()->worklist().push_back(Section_id(ppc_object, |
| 9073 | dst_indx)); |
| 9074 | } |
| 9075 | else |
| 9076 | ppc_object->add_gc_mark(dst_off); |
| 9077 | } |
| 9078 | } |
| 9079 | } |
| 9080 | |
| 9081 | // For a symbol location in .opd, set LOC to the location of the |
| 9082 | // function entry. |
| 9083 | |
| 9084 | template<int size, bool big_endian> |
| 9085 | void |
| 9086 | Target_powerpc<size, big_endian>::do_function_location( |
| 9087 | Symbol_location* loc) const |
| 9088 | { |
| 9089 | if (size == 64 && loc->shndx != 0) |
| 9090 | { |
| 9091 | if (loc->object->is_dynamic()) |
| 9092 | { |
| 9093 | Powerpc_dynobj<size, big_endian>* ppc_object |
| 9094 | = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object); |
| 9095 | if (loc->shndx == ppc_object->opd_shndx()) |
| 9096 | { |
| 9097 | Address dest_off; |
| 9098 | Address off = loc->offset - ppc_object->opd_address(); |
| 9099 | loc->shndx = ppc_object->get_opd_ent(off, &dest_off); |
| 9100 | loc->offset = dest_off; |
| 9101 | } |
| 9102 | } |
| 9103 | else |
| 9104 | { |
| 9105 | const Powerpc_relobj<size, big_endian>* ppc_object |
| 9106 | = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object); |
| 9107 | if (loc->shndx == ppc_object->opd_shndx()) |
| 9108 | { |
| 9109 | Address dest_off; |
| 9110 | loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off); |
| 9111 | loc->offset = dest_off; |
| 9112 | } |
| 9113 | } |
| 9114 | } |
| 9115 | } |
| 9116 | |
| 9117 | // FNOFFSET in section SHNDX in OBJECT is the start of a function |
| 9118 | // compiled with -fsplit-stack. The function calls non-split-stack |
| 9119 | // code. Change the function to ensure it has enough stack space to |
| 9120 | // call some random function. |
| 9121 | |
| 9122 | template<int size, bool big_endian> |
| 9123 | void |
| 9124 | Target_powerpc<size, big_endian>::do_calls_non_split( |
| 9125 | Relobj* object, |
| 9126 | unsigned int shndx, |
| 9127 | section_offset_type fnoffset, |
| 9128 | section_size_type fnsize, |
| 9129 | const unsigned char* prelocs, |
| 9130 | size_t reloc_count, |
| 9131 | unsigned char* view, |
| 9132 | section_size_type view_size, |
| 9133 | std::string* from, |
| 9134 | std::string* to) const |
| 9135 | { |
| 9136 | // 32-bit not supported. |
| 9137 | if (size == 32) |
| 9138 | { |
| 9139 | // warn |
| 9140 | Target::do_calls_non_split(object, shndx, fnoffset, fnsize, |
| 9141 | prelocs, reloc_count, view, view_size, |
| 9142 | from, to); |
| 9143 | return; |
| 9144 | } |
| 9145 | |
| 9146 | // The function always starts with |
| 9147 | // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss |
| 9148 | // addis %r12,%r1,-allocate@ha |
| 9149 | // addi %r12,%r12,-allocate@l |
| 9150 | // cmpld %r12,%r0 |
| 9151 | // but note that the addis or addi may be replaced with a nop |
| 9152 | |
| 9153 | unsigned char *entry = view + fnoffset; |
| 9154 | uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry); |
| 9155 | |
| 9156 | if ((insn & 0xffff0000) == addis_2_12) |
| 9157 | { |
| 9158 | /* Skip ELFv2 global entry code. */ |
| 9159 | entry += 8; |
| 9160 | insn = elfcpp::Swap<32, big_endian>::readval(entry); |
| 9161 | } |
| 9162 | |
| 9163 | unsigned char *pinsn = entry; |
| 9164 | bool ok = false; |
| 9165 | const uint32_t ld_private_ss = 0xe80d8fc0; |
| 9166 | if (insn == ld_private_ss) |
| 9167 | { |
| 9168 | int32_t allocate = 0; |
| 9169 | while (1) |
| 9170 | { |
| 9171 | pinsn += 4; |
| 9172 | insn = elfcpp::Swap<32, big_endian>::readval(pinsn); |
| 9173 | if ((insn & 0xffff0000) == addis_12_1) |
| 9174 | allocate += (insn & 0xffff) << 16; |
| 9175 | else if ((insn & 0xffff0000) == addi_12_1 |
| 9176 | || (insn & 0xffff0000) == addi_12_12) |
| 9177 | allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000; |
| 9178 | else if (insn != nop) |
| 9179 | break; |
| 9180 | } |
| 9181 | if (insn == cmpld_7_12_0 && pinsn == entry + 12) |
| 9182 | { |
| 9183 | int extra = parameters->options().split_stack_adjust_size(); |
| 9184 | allocate -= extra; |
| 9185 | if (allocate >= 0 || extra < 0) |
| 9186 | { |
| 9187 | object->error(_("split-stack stack size overflow at " |
| 9188 | "section %u offset %0zx"), |
| 9189 | shndx, static_cast<size_t>(fnoffset)); |
| 9190 | return; |
| 9191 | } |
| 9192 | pinsn = entry + 4; |
| 9193 | insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff); |
| 9194 | if (insn != addis_12_1) |
| 9195 | { |
| 9196 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); |
| 9197 | pinsn += 4; |
| 9198 | insn = addi_12_12 | (allocate & 0xffff); |
| 9199 | if (insn != addi_12_12) |
| 9200 | { |
| 9201 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); |
| 9202 | pinsn += 4; |
| 9203 | } |
| 9204 | } |
| 9205 | else |
| 9206 | { |
| 9207 | insn = addi_12_1 | (allocate & 0xffff); |
| 9208 | elfcpp::Swap<32, big_endian>::writeval(pinsn, insn); |
| 9209 | pinsn += 4; |
| 9210 | } |
| 9211 | if (pinsn != entry + 12) |
| 9212 | elfcpp::Swap<32, big_endian>::writeval(pinsn, nop); |
| 9213 | |
| 9214 | ok = true; |
| 9215 | } |
| 9216 | } |
| 9217 | |
| 9218 | if (!ok) |
| 9219 | { |
| 9220 | if (!object->has_no_split_stack()) |
| 9221 | object->error(_("failed to match split-stack sequence at " |
| 9222 | "section %u offset %0zx"), |
| 9223 | shndx, static_cast<size_t>(fnoffset)); |
| 9224 | } |
| 9225 | } |
| 9226 | |
| 9227 | // Scan relocations for a section. |
| 9228 | |
| 9229 | template<int size, bool big_endian> |
| 9230 | void |
| 9231 | Target_powerpc<size, big_endian>::scan_relocs( |
| 9232 | Symbol_table* symtab, |
| 9233 | Layout* layout, |
| 9234 | Sized_relobj_file<size, big_endian>* object, |
| 9235 | unsigned int data_shndx, |
| 9236 | unsigned int sh_type, |
| 9237 | const unsigned char* prelocs, |
| 9238 | size_t reloc_count, |
| 9239 | Output_section* output_section, |
| 9240 | bool needs_special_offset_handling, |
| 9241 | size_t local_symbol_count, |
| 9242 | const unsigned char* plocal_symbols) |
| 9243 | { |
| 9244 | typedef Target_powerpc<size, big_endian> Powerpc; |
| 9245 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 9246 | Classify_reloc; |
| 9247 | |
| 9248 | if (!this->plt_localentry0_init_) |
| 9249 | { |
| 9250 | bool plt_localentry0 = false; |
| 9251 | if (size == 64 |
| 9252 | && this->abiversion() >= 2) |
| 9253 | { |
| 9254 | if (parameters->options().user_set_plt_localentry()) |
| 9255 | plt_localentry0 = parameters->options().plt_localentry(); |
| 9256 | if (plt_localentry0 |
| 9257 | && symtab->lookup("GLIBC_2.26", NULL) == NULL) |
| 9258 | gold_warning(_("--plt-localentry is especially dangerous without " |
| 9259 | "ld.so support to detect ABI violations")); |
| 9260 | } |
| 9261 | this->plt_localentry0_ = plt_localentry0; |
| 9262 | this->plt_localentry0_init_ = true; |
| 9263 | } |
| 9264 | |
| 9265 | if (sh_type == elfcpp::SHT_REL) |
| 9266 | { |
| 9267 | gold_error(_("%s: unsupported REL reloc section"), |
| 9268 | object->name().c_str()); |
| 9269 | return; |
| 9270 | } |
| 9271 | |
| 9272 | gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>( |
| 9273 | symtab, |
| 9274 | layout, |
| 9275 | this, |
| 9276 | object, |
| 9277 | data_shndx, |
| 9278 | prelocs, |
| 9279 | reloc_count, |
| 9280 | output_section, |
| 9281 | needs_special_offset_handling, |
| 9282 | local_symbol_count, |
| 9283 | plocal_symbols); |
| 9284 | } |
| 9285 | |
| 9286 | // Functor class for processing the global symbol table. |
| 9287 | // Removes symbols defined on discarded opd entries. |
| 9288 | |
| 9289 | template<bool big_endian> |
| 9290 | class Global_symbol_visitor_opd |
| 9291 | { |
| 9292 | public: |
| 9293 | Global_symbol_visitor_opd() |
| 9294 | { } |
| 9295 | |
| 9296 | void |
| 9297 | operator()(Sized_symbol<64>* sym) |
| 9298 | { |
| 9299 | if (sym->has_symtab_index() |
| 9300 | || sym->source() != Symbol::FROM_OBJECT |
| 9301 | || !sym->in_real_elf()) |
| 9302 | return; |
| 9303 | |
| 9304 | if (sym->object()->is_dynamic()) |
| 9305 | return; |
| 9306 | |
| 9307 | Powerpc_relobj<64, big_endian>* symobj |
| 9308 | = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object()); |
| 9309 | if (symobj->opd_shndx() == 0) |
| 9310 | return; |
| 9311 | |
| 9312 | bool is_ordinary; |
| 9313 | unsigned int shndx = sym->shndx(&is_ordinary); |
| 9314 | if (shndx == symobj->opd_shndx() |
| 9315 | && symobj->get_opd_discard(sym->value())) |
| 9316 | { |
| 9317 | sym->set_undefined(); |
| 9318 | sym->set_visibility(elfcpp::STV_DEFAULT); |
| 9319 | sym->set_is_defined_in_discarded_section(); |
| 9320 | sym->set_symtab_index(-1U); |
| 9321 | } |
| 9322 | } |
| 9323 | }; |
| 9324 | |
| 9325 | template<int size, bool big_endian> |
| 9326 | void |
| 9327 | Target_powerpc<size, big_endian>::define_save_restore_funcs( |
| 9328 | Layout* layout, |
| 9329 | Symbol_table* symtab) |
| 9330 | { |
| 9331 | if (size == 64) |
| 9332 | { |
| 9333 | Output_data_save_res<size, big_endian>* savres |
| 9334 | = new Output_data_save_res<size, big_endian>(symtab); |
| 9335 | this->savres_section_ = savres; |
| 9336 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, |
| 9337 | elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR, |
| 9338 | savres, ORDER_TEXT, false); |
| 9339 | } |
| 9340 | } |
| 9341 | |
| 9342 | // Sort linker created .got section first (for the header), then input |
| 9343 | // sections belonging to files using small model code. |
| 9344 | |
| 9345 | template<bool big_endian> |
| 9346 | class Sort_toc_sections |
| 9347 | { |
| 9348 | public: |
| 9349 | bool |
| 9350 | operator()(const Output_section::Input_section& is1, |
| 9351 | const Output_section::Input_section& is2) const |
| 9352 | { |
| 9353 | if (!is1.is_input_section() && is2.is_input_section()) |
| 9354 | return true; |
| 9355 | bool small1 |
| 9356 | = (is1.is_input_section() |
| 9357 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj()) |
| 9358 | ->has_small_toc_reloc())); |
| 9359 | bool small2 |
| 9360 | = (is2.is_input_section() |
| 9361 | && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj()) |
| 9362 | ->has_small_toc_reloc())); |
| 9363 | return small1 && !small2; |
| 9364 | } |
| 9365 | }; |
| 9366 | |
| 9367 | // Finalize the sections. |
| 9368 | |
| 9369 | template<int size, bool big_endian> |
| 9370 | void |
| 9371 | Target_powerpc<size, big_endian>::do_finalize_sections( |
| 9372 | Layout* layout, |
| 9373 | const Input_objects* input_objects, |
| 9374 | Symbol_table* symtab) |
| 9375 | { |
| 9376 | if (parameters->doing_static_link()) |
| 9377 | { |
| 9378 | // At least some versions of glibc elf-init.o have a strong |
| 9379 | // reference to __rela_iplt marker syms. A weak ref would be |
| 9380 | // better.. |
| 9381 | if (this->iplt_ != NULL) |
| 9382 | { |
| 9383 | Reloc_section* rel = this->iplt_->rel_plt(); |
| 9384 | symtab->define_in_output_data("__rela_iplt_start", NULL, |
| 9385 | Symbol_table::PREDEFINED, rel, 0, 0, |
| 9386 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
| 9387 | elfcpp::STV_HIDDEN, 0, false, true); |
| 9388 | symtab->define_in_output_data("__rela_iplt_end", NULL, |
| 9389 | Symbol_table::PREDEFINED, rel, 0, 0, |
| 9390 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
| 9391 | elfcpp::STV_HIDDEN, 0, true, true); |
| 9392 | } |
| 9393 | else |
| 9394 | { |
| 9395 | symtab->define_as_constant("__rela_iplt_start", NULL, |
| 9396 | Symbol_table::PREDEFINED, 0, 0, |
| 9397 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
| 9398 | elfcpp::STV_HIDDEN, 0, true, false); |
| 9399 | symtab->define_as_constant("__rela_iplt_end", NULL, |
| 9400 | Symbol_table::PREDEFINED, 0, 0, |
| 9401 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
| 9402 | elfcpp::STV_HIDDEN, 0, true, false); |
| 9403 | } |
| 9404 | } |
| 9405 | |
| 9406 | if (size == 64) |
| 9407 | { |
| 9408 | typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor; |
| 9409 | symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor()); |
| 9410 | |
| 9411 | if (!parameters->options().relocatable()) |
| 9412 | { |
| 9413 | this->define_save_restore_funcs(layout, symtab); |
| 9414 | |
| 9415 | // Annoyingly, we need to make these sections now whether or |
| 9416 | // not we need them. If we delay until do_relax then we |
| 9417 | // need to mess with the relaxation machinery checkpointing. |
| 9418 | this->got_section(symtab, layout); |
| 9419 | this->make_brlt_section(layout); |
| 9420 | |
| 9421 | if (parameters->options().toc_sort()) |
| 9422 | { |
| 9423 | Output_section* os = this->got_->output_section(); |
| 9424 | if (os != NULL && os->input_sections().size() > 1) |
| 9425 | std::stable_sort(os->input_sections().begin(), |
| 9426 | os->input_sections().end(), |
| 9427 | Sort_toc_sections<big_endian>()); |
| 9428 | } |
| 9429 | } |
| 9430 | } |
| 9431 | |
| 9432 | // Fill in some more dynamic tags. |
| 9433 | Output_data_dynamic* odyn = layout->dynamic_data(); |
| 9434 | if (odyn != NULL) |
| 9435 | { |
| 9436 | const Reloc_section* rel_plt = (this->plt_ == NULL |
| 9437 | ? NULL |
| 9438 | : this->plt_->rel_plt()); |
| 9439 | layout->add_target_dynamic_tags(false, this->plt_, rel_plt, |
| 9440 | this->rela_dyn_, true, size == 32); |
| 9441 | |
| 9442 | if (size == 32) |
| 9443 | { |
| 9444 | if (this->got_ != NULL) |
| 9445 | { |
| 9446 | this->got_->finalize_data_size(); |
| 9447 | odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT, |
| 9448 | this->got_, this->got_->g_o_t()); |
| 9449 | } |
| 9450 | if (this->has_tls_get_addr_opt_) |
| 9451 | odyn->add_constant(elfcpp::DT_PPC_OPT, elfcpp::PPC_OPT_TLS); |
| 9452 | } |
| 9453 | else |
| 9454 | { |
| 9455 | if (this->glink_ != NULL) |
| 9456 | { |
| 9457 | this->glink_->finalize_data_size(); |
| 9458 | odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK, |
| 9459 | this->glink_, |
| 9460 | (this->glink_->pltresolve_size() |
| 9461 | - 32)); |
| 9462 | } |
| 9463 | if (this->has_localentry0_ || this->has_tls_get_addr_opt_) |
| 9464 | odyn->add_constant(elfcpp::DT_PPC64_OPT, |
| 9465 | ((this->has_localentry0_ |
| 9466 | ? elfcpp::PPC64_OPT_LOCALENTRY : 0) |
| 9467 | | (this->has_tls_get_addr_opt_ |
| 9468 | ? elfcpp::PPC64_OPT_TLS : 0))); |
| 9469 | } |
| 9470 | } |
| 9471 | |
| 9472 | // Emit any relocs we saved in an attempt to avoid generating COPY |
| 9473 | // relocs. |
| 9474 | if (this->copy_relocs_.any_saved_relocs()) |
| 9475 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); |
| 9476 | |
| 9477 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); |
| 9478 | p != input_objects->relobj_end(); |
| 9479 | ++p) |
| 9480 | { |
| 9481 | Powerpc_relobj<size, big_endian>* ppc_relobj |
| 9482 | = static_cast<Powerpc_relobj<size, big_endian>*>(*p); |
| 9483 | if (ppc_relobj->attributes_section_data()) |
| 9484 | this->merge_object_attributes(ppc_relobj->name().c_str(), |
| 9485 | ppc_relobj->attributes_section_data()); |
| 9486 | } |
| 9487 | for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin(); |
| 9488 | p != input_objects->dynobj_end(); |
| 9489 | ++p) |
| 9490 | { |
| 9491 | Powerpc_dynobj<size, big_endian>* ppc_dynobj |
| 9492 | = static_cast<Powerpc_dynobj<size, big_endian>*>(*p); |
| 9493 | if (ppc_dynobj->attributes_section_data()) |
| 9494 | this->merge_object_attributes(ppc_dynobj->name().c_str(), |
| 9495 | ppc_dynobj->attributes_section_data()); |
| 9496 | } |
| 9497 | |
| 9498 | // Create a .gnu.attributes section if we have merged any attributes |
| 9499 | // from inputs. |
| 9500 | if (this->attributes_section_data_ != NULL |
| 9501 | && this->attributes_section_data_->size() != 0) |
| 9502 | { |
| 9503 | Output_attributes_section_data* attributes_section |
| 9504 | = new Output_attributes_section_data(*this->attributes_section_data_); |
| 9505 | layout->add_output_section_data(".gnu.attributes", |
| 9506 | elfcpp::SHT_GNU_ATTRIBUTES, 0, |
| 9507 | attributes_section, ORDER_INVALID, false); |
| 9508 | } |
| 9509 | } |
| 9510 | |
| 9511 | // Merge object attributes from input file called NAME with those of the |
| 9512 | // output. The input object attributes are in the object pointed by PASD. |
| 9513 | |
| 9514 | template<int size, bool big_endian> |
| 9515 | void |
| 9516 | Target_powerpc<size, big_endian>::merge_object_attributes( |
| 9517 | const char* name, |
| 9518 | const Attributes_section_data* pasd) |
| 9519 | { |
| 9520 | // Return if there is no attributes section data. |
| 9521 | if (pasd == NULL) |
| 9522 | return; |
| 9523 | |
| 9524 | // Create output object attributes. |
| 9525 | if (this->attributes_section_data_ == NULL) |
| 9526 | this->attributes_section_data_ = new Attributes_section_data(NULL, 0); |
| 9527 | |
| 9528 | const int vendor = Object_attribute::OBJ_ATTR_GNU; |
| 9529 | const Object_attribute* in_attr = pasd->known_attributes(vendor); |
| 9530 | Object_attribute* out_attr |
| 9531 | = this->attributes_section_data_->known_attributes(vendor); |
| 9532 | |
| 9533 | const char* err; |
| 9534 | const char* first; |
| 9535 | const char* second; |
| 9536 | int tag = elfcpp::Tag_GNU_Power_ABI_FP; |
| 9537 | int in_fp = in_attr[tag].int_value() & 0xf; |
| 9538 | int out_fp = out_attr[tag].int_value() & 0xf; |
| 9539 | if (in_fp != out_fp) |
| 9540 | { |
| 9541 | err = NULL; |
| 9542 | if ((in_fp & 3) == 0) |
| 9543 | ; |
| 9544 | else if ((out_fp & 3) == 0) |
| 9545 | { |
| 9546 | out_fp |= in_fp & 3; |
| 9547 | out_attr[tag].set_int_value(out_fp); |
| 9548 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); |
| 9549 | this->last_fp_ = name; |
| 9550 | } |
| 9551 | else if ((out_fp & 3) != 2 && (in_fp & 3) == 2) |
| 9552 | { |
| 9553 | err = N_("%s uses hard float, %s uses soft float"); |
| 9554 | first = this->last_fp_; |
| 9555 | second = name; |
| 9556 | } |
| 9557 | else if ((out_fp & 3) == 2 && (in_fp & 3) != 2) |
| 9558 | { |
| 9559 | err = N_("%s uses hard float, %s uses soft float"); |
| 9560 | first = name; |
| 9561 | second = this->last_fp_; |
| 9562 | } |
| 9563 | else if ((out_fp & 3) == 1 && (in_fp & 3) == 3) |
| 9564 | { |
| 9565 | err = N_("%s uses double-precision hard float, " |
| 9566 | "%s uses single-precision hard float"); |
| 9567 | first = this->last_fp_; |
| 9568 | second = name; |
| 9569 | } |
| 9570 | else if ((out_fp & 3) == 3 && (in_fp & 3) == 1) |
| 9571 | { |
| 9572 | err = N_("%s uses double-precision hard float, " |
| 9573 | "%s uses single-precision hard float"); |
| 9574 | first = name; |
| 9575 | second = this->last_fp_; |
| 9576 | } |
| 9577 | |
| 9578 | if (err || (in_fp & 0xc) == 0) |
| 9579 | ; |
| 9580 | else if ((out_fp & 0xc) == 0) |
| 9581 | { |
| 9582 | out_fp |= in_fp & 0xc; |
| 9583 | out_attr[tag].set_int_value(out_fp); |
| 9584 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); |
| 9585 | this->last_ld_ = name; |
| 9586 | } |
| 9587 | else if ((out_fp & 0xc) != 2 * 4 && (in_fp & 0xc) == 2 * 4) |
| 9588 | { |
| 9589 | err = N_("%s uses 64-bit long double, %s uses 128-bit long double"); |
| 9590 | first = name; |
| 9591 | second = this->last_ld_; |
| 9592 | } |
| 9593 | else if ((in_fp & 0xc) != 2 * 4 && (out_fp & 0xc) == 2 * 4) |
| 9594 | { |
| 9595 | err = N_("%s uses 64-bit long double, %s uses 128-bit long double"); |
| 9596 | first = this->last_ld_; |
| 9597 | second = name; |
| 9598 | } |
| 9599 | else if ((out_fp & 0xc) == 1 * 4 && (in_fp & 0xc) == 3 * 4) |
| 9600 | { |
| 9601 | err = N_("%s uses IBM long double, %s uses IEEE long double"); |
| 9602 | first = this->last_ld_; |
| 9603 | second = name; |
| 9604 | } |
| 9605 | else if ((out_fp & 0xc) == 3 * 4 && (in_fp & 0xc) == 1 * 4) |
| 9606 | { |
| 9607 | err = N_("%s uses IBM long double, %s uses IEEE long double"); |
| 9608 | first = name; |
| 9609 | second = this->last_ld_; |
| 9610 | } |
| 9611 | |
| 9612 | if (err) |
| 9613 | { |
| 9614 | if (parameters->options().warn_mismatch()) |
| 9615 | gold_error(_(err), first, second); |
| 9616 | // Arrange for this attribute to be deleted. It's better to |
| 9617 | // say "don't know" about a file than to wrongly claim compliance. |
| 9618 | out_attr[tag].set_type(0); |
| 9619 | } |
| 9620 | } |
| 9621 | |
| 9622 | if (size == 32) |
| 9623 | { |
| 9624 | tag = elfcpp::Tag_GNU_Power_ABI_Vector; |
| 9625 | int in_vec = in_attr[tag].int_value() & 3; |
| 9626 | int out_vec = out_attr[tag].int_value() & 3; |
| 9627 | if (in_vec != out_vec) |
| 9628 | { |
| 9629 | err = NULL; |
| 9630 | if (in_vec == 0) |
| 9631 | ; |
| 9632 | else if (out_vec == 0) |
| 9633 | { |
| 9634 | out_vec = in_vec; |
| 9635 | out_attr[tag].set_int_value(out_vec); |
| 9636 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); |
| 9637 | this->last_vec_ = name; |
| 9638 | } |
| 9639 | // For now, allow generic to transition to AltiVec or SPE |
| 9640 | // without a warning. If GCC marked files with their stack |
| 9641 | // alignment and used don't-care markings for files which are |
| 9642 | // not affected by the vector ABI, we could warn about this |
| 9643 | // case too. */ |
| 9644 | else if (in_vec == 1) |
| 9645 | ; |
| 9646 | else if (out_vec == 1) |
| 9647 | { |
| 9648 | out_vec = in_vec; |
| 9649 | out_attr[tag].set_int_value(out_vec); |
| 9650 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); |
| 9651 | this->last_vec_ = name; |
| 9652 | } |
| 9653 | else if (out_vec < in_vec) |
| 9654 | { |
| 9655 | err = N_("%s uses AltiVec vector ABI, %s uses SPE vector ABI"); |
| 9656 | first = this->last_vec_; |
| 9657 | second = name; |
| 9658 | } |
| 9659 | else if (out_vec > in_vec) |
| 9660 | { |
| 9661 | err = N_("%s uses AltiVec vector ABI, %s uses SPE vector ABI"); |
| 9662 | first = name; |
| 9663 | second = this->last_vec_; |
| 9664 | } |
| 9665 | if (err) |
| 9666 | { |
| 9667 | if (parameters->options().warn_mismatch()) |
| 9668 | gold_error(_(err), first, second); |
| 9669 | out_attr[tag].set_type(0); |
| 9670 | } |
| 9671 | } |
| 9672 | |
| 9673 | tag = elfcpp::Tag_GNU_Power_ABI_Struct_Return; |
| 9674 | int in_struct = in_attr[tag].int_value() & 3; |
| 9675 | int out_struct = out_attr[tag].int_value() & 3; |
| 9676 | if (in_struct != out_struct) |
| 9677 | { |
| 9678 | err = NULL; |
| 9679 | if (in_struct == 0 || in_struct == 3) |
| 9680 | ; |
| 9681 | else if (out_struct == 0) |
| 9682 | { |
| 9683 | out_struct = in_struct; |
| 9684 | out_attr[tag].set_int_value(out_struct); |
| 9685 | out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL); |
| 9686 | this->last_struct_ = name; |
| 9687 | } |
| 9688 | else if (out_struct < in_struct) |
| 9689 | { |
| 9690 | err = N_("%s uses r3/r4 for small structure returns, " |
| 9691 | "%s uses memory"); |
| 9692 | first = this->last_struct_; |
| 9693 | second = name; |
| 9694 | } |
| 9695 | else if (out_struct > in_struct) |
| 9696 | { |
| 9697 | err = N_("%s uses r3/r4 for small structure returns, " |
| 9698 | "%s uses memory"); |
| 9699 | first = name; |
| 9700 | second = this->last_struct_; |
| 9701 | } |
| 9702 | if (err) |
| 9703 | { |
| 9704 | if (parameters->options().warn_mismatch()) |
| 9705 | gold_error(_(err), first, second); |
| 9706 | out_attr[tag].set_type(0); |
| 9707 | } |
| 9708 | } |
| 9709 | } |
| 9710 | |
| 9711 | // Merge Tag_compatibility attributes and any common GNU ones. |
| 9712 | this->attributes_section_data_->merge(name, pasd); |
| 9713 | } |
| 9714 | |
| 9715 | // Emit any saved relocs, and mark toc entries using any of these |
| 9716 | // relocs as not optimizable. |
| 9717 | |
| 9718 | template<int sh_type, int size, bool big_endian> |
| 9719 | void |
| 9720 | Powerpc_copy_relocs<sh_type, size, big_endian>::emit( |
| 9721 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section) |
| 9722 | { |
| 9723 | if (size == 64 |
| 9724 | && parameters->options().toc_optimize()) |
| 9725 | { |
| 9726 | for (typename Copy_relocs<sh_type, size, big_endian>:: |
| 9727 | Copy_reloc_entries::iterator p = this->entries_.begin(); |
| 9728 | p != this->entries_.end(); |
| 9729 | ++p) |
| 9730 | { |
| 9731 | typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry& |
| 9732 | entry = *p; |
| 9733 | |
| 9734 | // If the symbol is no longer defined in a dynamic object, |
| 9735 | // then we emitted a COPY relocation. If it is still |
| 9736 | // dynamic then we'll need dynamic relocations and thus |
| 9737 | // can't optimize toc entries. |
| 9738 | if (entry.sym_->is_from_dynobj()) |
| 9739 | { |
| 9740 | Powerpc_relobj<size, big_endian>* ppc_object |
| 9741 | = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_); |
| 9742 | if (entry.shndx_ == ppc_object->toc_shndx()) |
| 9743 | ppc_object->set_no_toc_opt(entry.address_); |
| 9744 | } |
| 9745 | } |
| 9746 | } |
| 9747 | |
| 9748 | Copy_relocs<sh_type, size, big_endian>::emit(reloc_section); |
| 9749 | } |
| 9750 | |
| 9751 | // Return the value to use for a branch relocation. |
| 9752 | |
| 9753 | template<int size, bool big_endian> |
| 9754 | bool |
| 9755 | Target_powerpc<size, big_endian>::symval_for_branch( |
| 9756 | const Symbol_table* symtab, |
| 9757 | const Sized_symbol<size>* gsym, |
| 9758 | Powerpc_relobj<size, big_endian>* object, |
| 9759 | Address *value, |
| 9760 | unsigned int *dest_shndx) |
| 9761 | { |
| 9762 | if (size == 32 || this->abiversion() >= 2) |
| 9763 | gold_unreachable(); |
| 9764 | *dest_shndx = 0; |
| 9765 | |
| 9766 | // If the symbol is defined in an opd section, ie. is a function |
| 9767 | // descriptor, use the function descriptor code entry address |
| 9768 | Powerpc_relobj<size, big_endian>* symobj = object; |
| 9769 | if (gsym != NULL |
| 9770 | && (gsym->source() != Symbol::FROM_OBJECT |
| 9771 | || gsym->object()->is_dynamic())) |
| 9772 | return true; |
| 9773 | if (gsym != NULL) |
| 9774 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object()); |
| 9775 | unsigned int shndx = symobj->opd_shndx(); |
| 9776 | if (shndx == 0) |
| 9777 | return true; |
| 9778 | Address opd_addr = symobj->get_output_section_offset(shndx); |
| 9779 | if (opd_addr == invalid_address) |
| 9780 | return true; |
| 9781 | opd_addr += symobj->output_section_address(shndx); |
| 9782 | if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx)) |
| 9783 | { |
| 9784 | Address sec_off; |
| 9785 | *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off); |
| 9786 | if (symtab->is_section_folded(symobj, *dest_shndx)) |
| 9787 | { |
| 9788 | Section_id folded |
| 9789 | = symtab->icf()->get_folded_section(symobj, *dest_shndx); |
| 9790 | symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first); |
| 9791 | *dest_shndx = folded.second; |
| 9792 | } |
| 9793 | Address sec_addr = symobj->get_output_section_offset(*dest_shndx); |
| 9794 | if (sec_addr == invalid_address) |
| 9795 | return false; |
| 9796 | |
| 9797 | sec_addr += symobj->output_section(*dest_shndx)->address(); |
| 9798 | *value = sec_addr + sec_off; |
| 9799 | } |
| 9800 | return true; |
| 9801 | } |
| 9802 | |
| 9803 | template<int size> |
| 9804 | static bool |
| 9805 | relative_value_is_known(const Sized_symbol<size>* gsym) |
| 9806 | { |
| 9807 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) |
| 9808 | return false; |
| 9809 | |
| 9810 | if (gsym->is_from_dynobj() |
| 9811 | || gsym->is_undefined() |
| 9812 | || gsym->is_preemptible()) |
| 9813 | return false; |
| 9814 | |
| 9815 | if (gsym->is_absolute()) |
| 9816 | return !parameters->options().output_is_position_independent(); |
| 9817 | |
| 9818 | return true; |
| 9819 | } |
| 9820 | |
| 9821 | template<int size> |
| 9822 | static bool |
| 9823 | relative_value_is_known(const Symbol_value<size>* psymval) |
| 9824 | { |
| 9825 | if (psymval->is_ifunc_symbol()) |
| 9826 | return false; |
| 9827 | |
| 9828 | bool is_ordinary; |
| 9829 | unsigned int shndx = psymval->input_shndx(&is_ordinary); |
| 9830 | |
| 9831 | return is_ordinary && shndx != elfcpp::SHN_UNDEF; |
| 9832 | } |
| 9833 | |
| 9834 | // PCREL_OPT in one instance flags to the linker that a pair of insns: |
| 9835 | // pld ra,symbol@got@pcrel |
| 9836 | // load/store rt,0(ra) |
| 9837 | // or |
| 9838 | // pla ra,symbol@pcrel |
| 9839 | // load/store rt,0(ra) |
| 9840 | // may be translated to |
| 9841 | // pload/pstore rt,symbol@pcrel |
| 9842 | // nop. |
| 9843 | // This function returns true if the optimization is possible, placing |
| 9844 | // the prefix insn in *PINSN1 and a NOP in *PINSN2. |
| 9845 | // |
| 9846 | // On entry to this function, the linker has already determined that |
| 9847 | // the pld can be replaced with pla: *PINSN1 is that pla insn, |
| 9848 | // while *PINSN2 is the second instruction. |
| 9849 | |
| 9850 | inline bool |
| 9851 | xlate_pcrel_opt(uint64_t *pinsn1, uint64_t *pinsn2) |
| 9852 | { |
| 9853 | uint32_t insn2 = *pinsn2 >> 32; |
| 9854 | uint64_t i1new; |
| 9855 | |
| 9856 | // Check that regs match. |
| 9857 | if (((insn2 >> 16) & 31) != ((*pinsn1 >> 21) & 31)) |
| 9858 | return false; |
| 9859 | |
| 9860 | switch ((insn2 >> 26) & 63) |
| 9861 | { |
| 9862 | default: |
| 9863 | return false; |
| 9864 | |
| 9865 | case 32: // lwz |
| 9866 | case 34: // lbz |
| 9867 | case 36: // stw |
| 9868 | case 38: // stb |
| 9869 | case 40: // lhz |
| 9870 | case 42: // lha |
| 9871 | case 44: // sth |
| 9872 | case 48: // lfs |
| 9873 | case 50: // lfd |
| 9874 | case 52: // stfs |
| 9875 | case 54: // stfd |
| 9876 | // These are the PMLS cases, where we just need to tack a prefix |
| 9877 | // on the insn. Check that the D field is zero. |
| 9878 | if ((insn2 & 0xffff) != 0) |
| 9879 | return false; |
| 9880 | i1new = ((1ULL << 58) | (2ULL << 56) | (1ULL << 52) |
| 9881 | | (insn2 & ((63ULL << 26) | (31ULL << 21)))); |
| 9882 | break; |
| 9883 | |
| 9884 | case 58: // lwa, ld |
| 9885 | if ((insn2 & 0xfffd) != 0) |
| 9886 | return false; |
| 9887 | i1new = ((1ULL << 58) | (1ULL << 52) |
| 9888 | | (insn2 & 2 ? 41ULL << 26 : 57ULL << 26) |
| 9889 | | (insn2 & (31ULL << 21))); |
| 9890 | break; |
| 9891 | |
| 9892 | case 57: // lxsd, lxssp |
| 9893 | if ((insn2 & 0xfffc) != 0 || (insn2 & 3) < 2) |
| 9894 | return false; |
| 9895 | i1new = ((1ULL << 58) | (1ULL << 52) |
| 9896 | | ((40ULL | (insn2 & 3)) << 26) |
| 9897 | | (insn2 & (31ULL << 21))); |
| 9898 | break; |
| 9899 | |
| 9900 | case 61: // stxsd, stxssp, lxv, stxv |
| 9901 | if ((insn2 & 3) == 0) |
| 9902 | return false; |
| 9903 | else if ((insn2 & 3) >= 2) |
| 9904 | { |
| 9905 | if ((insn2 & 0xfffc) != 0) |
| 9906 | return false; |
| 9907 | i1new = ((1ULL << 58) | (1ULL << 52) |
| 9908 | | ((44ULL | (insn2 & 3)) << 26) |
| 9909 | | (insn2 & (31ULL << 21))); |
| 9910 | } |
| 9911 | else |
| 9912 | { |
| 9913 | if ((insn2 & 0xfff0) != 0) |
| 9914 | return false; |
| 9915 | i1new = ((1ULL << 58) | (1ULL << 52) |
| 9916 | | ((50ULL | (insn2 & 4) | ((insn2 & 8) >> 3)) << 26) |
| 9917 | | (insn2 & (31ULL << 21))); |
| 9918 | } |
| 9919 | break; |
| 9920 | |
| 9921 | case 56: // lq |
| 9922 | if ((insn2 & 0xffff) != 0) |
| 9923 | return false; |
| 9924 | i1new = ((1ULL << 58) | (1ULL << 52) |
| 9925 | | (insn2 & ((63ULL << 26) | (31ULL << 21)))); |
| 9926 | break; |
| 9927 | |
| 9928 | case 62: // std, stq |
| 9929 | if ((insn2 & 0xfffd) != 0) |
| 9930 | return false; |
| 9931 | i1new = ((1ULL << 58) | (1ULL << 52) |
| 9932 | | ((insn2 & 2) == 0 ? 61ULL << 26 : 60ULL << 26) |
| 9933 | | (insn2 & (31ULL << 21))); |
| 9934 | break; |
| 9935 | } |
| 9936 | |
| 9937 | *pinsn1 = i1new; |
| 9938 | *pinsn2 = (uint64_t) nop << 32; |
| 9939 | return true; |
| 9940 | } |
| 9941 | |
| 9942 | // Perform a relocation. |
| 9943 | |
| 9944 | template<int size, bool big_endian> |
| 9945 | inline bool |
| 9946 | Target_powerpc<size, big_endian>::Relocate::relocate( |
| 9947 | const Relocate_info<size, big_endian>* relinfo, |
| 9948 | unsigned int, |
| 9949 | Target_powerpc* target, |
| 9950 | Output_section* os, |
| 9951 | size_t relnum, |
| 9952 | const unsigned char* preloc, |
| 9953 | const Sized_symbol<size>* gsym, |
| 9954 | const Symbol_value<size>* psymval, |
| 9955 | unsigned char* view, |
| 9956 | Address address, |
| 9957 | section_size_type view_size) |
| 9958 | { |
| 9959 | typedef Powerpc_relocate_functions<size, big_endian> Reloc; |
| 9960 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn; |
| 9961 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
| 9962 | |
| 9963 | if (view == NULL) |
| 9964 | return true; |
| 9965 | |
| 9966 | if (target->replace_tls_get_addr(gsym)) |
| 9967 | gsym = static_cast<const Sized_symbol<size>*>(target->tls_get_addr_opt()); |
| 9968 | |
| 9969 | const elfcpp::Rela<size, big_endian> rela(preloc); |
| 9970 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); |
| 9971 | switch (this->maybe_skip_tls_get_addr_call(target, r_type, gsym)) |
| 9972 | { |
| 9973 | case Track_tls::NOT_EXPECTED: |
| 9974 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 9975 | _("__tls_get_addr call lacks marker reloc")); |
| 9976 | break; |
| 9977 | case Track_tls::EXPECTED: |
| 9978 | // We have already complained. |
| 9979 | break; |
| 9980 | case Track_tls::SKIP: |
| 9981 | if (is_plt16_reloc<size>(r_type) |
| 9982 | || r_type == elfcpp::R_POWERPC_PLTSEQ |
| 9983 | || r_type == elfcpp::R_PPC64_PLTSEQ_NOTOC) |
| 9984 | { |
| 9985 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 9986 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); |
| 9987 | } |
| 9988 | else if (size == 64 && r_type == elfcpp::R_POWERPC_PLTCALL) |
| 9989 | { |
| 9990 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 9991 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, nop); |
| 9992 | } |
| 9993 | else if (size == 64 && (r_type == elfcpp::R_PPC64_PLT_PCREL34 |
| 9994 | || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC)) |
| 9995 | { |
| 9996 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 9997 | elfcpp::Swap<32, big_endian>::writeval(iview, pnop >> 32); |
| 9998 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, pnop & 0xffffffff); |
| 9999 | } |
| 10000 | return true; |
| 10001 | case Track_tls::NORMAL: |
| 10002 | break; |
| 10003 | } |
| 10004 | |
| 10005 | // Offset from start of insn to d-field reloc. |
| 10006 | const int d_offset = big_endian ? 2 : 0; |
| 10007 | |
| 10008 | Powerpc_relobj<size, big_endian>* const object |
| 10009 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); |
| 10010 | Address value = 0; |
| 10011 | bool has_stub_value = false; |
| 10012 | bool localentry0 = false; |
| 10013 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| 10014 | bool has_plt_offset |
| 10015 | = (gsym != NULL |
| 10016 | ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target)) |
| 10017 | : object->local_has_plt_offset(r_sym)); |
| 10018 | if (has_plt_offset |
| 10019 | && !is_plt16_reloc<size>(r_type) |
| 10020 | && r_type != elfcpp::R_PPC64_PLT_PCREL34 |
| 10021 | && r_type != elfcpp::R_PPC64_PLT_PCREL34_NOTOC |
| 10022 | && r_type != elfcpp::R_POWERPC_PLTSEQ |
| 10023 | && r_type != elfcpp::R_POWERPC_PLTCALL |
| 10024 | && r_type != elfcpp::R_PPC64_PLTSEQ_NOTOC |
| 10025 | && r_type != elfcpp::R_PPC64_PLTCALL_NOTOC |
| 10026 | && (!psymval->is_ifunc_symbol() |
| 10027 | || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false))) |
| 10028 | { |
| 10029 | if (size == 64 |
| 10030 | && gsym != NULL |
| 10031 | && target->abiversion() >= 2 |
| 10032 | && !parameters->options().output_is_position_independent() |
| 10033 | && !is_branch_reloc<size>(r_type)) |
| 10034 | { |
| 10035 | Address off = target->glink_section()->find_global_entry(gsym); |
| 10036 | if (off != invalid_address) |
| 10037 | { |
| 10038 | value = target->glink_section()->global_entry_address() + off; |
| 10039 | has_stub_value = true; |
| 10040 | } |
| 10041 | } |
| 10042 | else |
| 10043 | { |
| 10044 | Stub_table<size, big_endian>* stub_table = NULL; |
| 10045 | if (target->stub_tables().size() == 1) |
| 10046 | stub_table = target->stub_tables()[0]; |
| 10047 | if (stub_table == NULL |
| 10048 | && !(size == 32 |
| 10049 | && gsym != NULL |
| 10050 | && !parameters->options().output_is_position_independent() |
| 10051 | && !is_branch_reloc<size>(r_type))) |
| 10052 | stub_table = object->stub_table(relinfo->data_shndx); |
| 10053 | if (stub_table == NULL) |
| 10054 | { |
| 10055 | // This is a ref from a data section to an ifunc symbol, |
| 10056 | // or a non-branch reloc for which we always want to use |
| 10057 | // one set of stubs for resolving function addresses. |
| 10058 | if (target->stub_tables().size() != 0) |
| 10059 | stub_table = target->stub_tables()[0]; |
| 10060 | } |
| 10061 | if (stub_table != NULL) |
| 10062 | { |
| 10063 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent; |
| 10064 | if (gsym != NULL) |
| 10065 | ent = stub_table->find_plt_call_entry(object, gsym, r_type, |
| 10066 | rela.get_r_addend()); |
| 10067 | else |
| 10068 | ent = stub_table->find_plt_call_entry(object, r_sym, r_type, |
| 10069 | rela.get_r_addend()); |
| 10070 | if (ent != NULL) |
| 10071 | { |
| 10072 | value = stub_table->stub_address() + ent->off_; |
| 10073 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 10074 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); |
| 10075 | size_t reloc_count = shdr.get_sh_size() / reloc_size; |
| 10076 | if (size == 64 |
| 10077 | && ent->r2save_ |
| 10078 | && r_type == elfcpp::R_PPC64_REL24_NOTOC) |
| 10079 | value += 4; |
| 10080 | else if (size == 64 |
| 10081 | && ent->r2save_ |
| 10082 | && relnum < reloc_count - 1) |
| 10083 | { |
| 10084 | Reltype next_rela(preloc + reloc_size); |
| 10085 | if (elfcpp::elf_r_type<size>(next_rela.get_r_info()) |
| 10086 | == elfcpp::R_PPC64_TOCSAVE |
| 10087 | && next_rela.get_r_offset() == rela.get_r_offset() + 4) |
| 10088 | value += 4; |
| 10089 | } |
| 10090 | localentry0 = ent->localentry0_; |
| 10091 | has_stub_value = true; |
| 10092 | } |
| 10093 | } |
| 10094 | } |
| 10095 | // We don't care too much about bogus debug references to |
| 10096 | // non-local functions, but otherwise there had better be a plt |
| 10097 | // call stub or global entry stub as appropriate. |
| 10098 | gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC)); |
| 10099 | } |
| 10100 | |
| 10101 | if (has_plt_offset && (is_plt16_reloc<size>(r_type) |
| 10102 | || r_type == elfcpp::R_PPC64_PLT_PCREL34 |
| 10103 | || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC)) |
| 10104 | { |
| 10105 | const Output_data_plt_powerpc<size, big_endian>* plt; |
| 10106 | if (gsym) |
| 10107 | value = target->plt_off(gsym, &plt); |
| 10108 | else |
| 10109 | value = target->plt_off(object, r_sym, &plt); |
| 10110 | value += plt->address(); |
| 10111 | |
| 10112 | if (size == 64) |
| 10113 | { |
| 10114 | if (r_type != elfcpp::R_PPC64_PLT_PCREL34 |
| 10115 | && r_type != elfcpp::R_PPC64_PLT_PCREL34_NOTOC) |
| 10116 | value -= (target->got_section()->output_section()->address() |
| 10117 | + object->toc_base_offset()); |
| 10118 | } |
| 10119 | else if (parameters->options().output_is_position_independent()) |
| 10120 | { |
| 10121 | if (rela.get_r_addend() >= 32768) |
| 10122 | { |
| 10123 | unsigned int got2 = object->got2_shndx(); |
| 10124 | value -= (object->get_output_section_offset(got2) |
| 10125 | + object->output_section(got2)->address() |
| 10126 | + rela.get_r_addend()); |
| 10127 | } |
| 10128 | else |
| 10129 | value -= (target->got_section()->address() |
| 10130 | + target->got_section()->g_o_t()); |
| 10131 | } |
| 10132 | } |
| 10133 | else if (!has_plt_offset |
| 10134 | && (is_plt16_reloc<size>(r_type) |
| 10135 | || r_type == elfcpp::R_POWERPC_PLTSEQ |
| 10136 | || r_type == elfcpp::R_PPC64_PLTSEQ_NOTOC)) |
| 10137 | { |
| 10138 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10139 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); |
| 10140 | r_type = elfcpp::R_POWERPC_NONE; |
| 10141 | } |
| 10142 | else if (!has_plt_offset |
| 10143 | && (r_type == elfcpp::R_PPC64_PLT_PCREL34 |
| 10144 | || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC)) |
| 10145 | { |
| 10146 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10147 | elfcpp::Swap<32, big_endian>::writeval(iview, pnop >> 32); |
| 10148 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, pnop & 0xffffffff); |
| 10149 | r_type = elfcpp::R_POWERPC_NONE; |
| 10150 | } |
| 10151 | else if (r_type == elfcpp::R_POWERPC_GOT16 |
| 10152 | || r_type == elfcpp::R_POWERPC_GOT16_LO |
| 10153 | || r_type == elfcpp::R_POWERPC_GOT16_HI |
| 10154 | || r_type == elfcpp::R_POWERPC_GOT16_HA |
| 10155 | || r_type == elfcpp::R_PPC64_GOT16_DS |
| 10156 | || r_type == elfcpp::R_PPC64_GOT16_LO_DS |
| 10157 | || r_type == elfcpp::R_PPC64_GOT_PCREL34) |
| 10158 | { |
| 10159 | if (gsym != NULL) |
| 10160 | { |
| 10161 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); |
| 10162 | value = gsym->got_offset(GOT_TYPE_STANDARD); |
| 10163 | } |
| 10164 | else |
| 10165 | { |
| 10166 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
| 10167 | value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); |
| 10168 | } |
| 10169 | if (r_type == elfcpp::R_PPC64_GOT_PCREL34) |
| 10170 | value += target->got_section()->address(); |
| 10171 | else |
| 10172 | value -= target->got_section()->got_base_offset(object); |
| 10173 | } |
| 10174 | else if (r_type == elfcpp::R_PPC64_TOC) |
| 10175 | { |
| 10176 | value = (target->got_section()->output_section()->address() |
| 10177 | + object->toc_base_offset()); |
| 10178 | } |
| 10179 | else if (gsym != NULL |
| 10180 | && (r_type == elfcpp::R_POWERPC_REL24 |
| 10181 | || r_type == elfcpp::R_PPC_PLTREL24) |
| 10182 | && has_stub_value) |
| 10183 | { |
| 10184 | if (size == 64) |
| 10185 | { |
| 10186 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; |
| 10187 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
| 10188 | bool can_plt_call = localentry0 || target->is_tls_get_addr_opt(gsym); |
| 10189 | if (!can_plt_call && rela.get_r_offset() + 8 <= view_size) |
| 10190 | { |
| 10191 | Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv); |
| 10192 | Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1); |
| 10193 | if ((insn & 1) != 0 |
| 10194 | && (insn2 == nop |
| 10195 | || insn2 == cror_15_15_15 || insn2 == cror_31_31_31)) |
| 10196 | { |
| 10197 | elfcpp::Swap<32, big_endian>:: |
| 10198 | writeval(wv + 1, ld_2_1 + target->stk_toc()); |
| 10199 | can_plt_call = true; |
| 10200 | } |
| 10201 | } |
| 10202 | if (!can_plt_call) |
| 10203 | { |
| 10204 | // If we don't have a branch and link followed by a nop, |
| 10205 | // we can't go via the plt because there is no place to |
| 10206 | // put a toc restoring instruction. |
| 10207 | // Unless we know we won't be returning. |
| 10208 | if (strcmp(gsym->name(), "__libc_start_main") == 0) |
| 10209 | can_plt_call = true; |
| 10210 | } |
| 10211 | if (!can_plt_call) |
| 10212 | { |
| 10213 | // g++ as of 20130507 emits self-calls without a |
| 10214 | // following nop. This is arguably wrong since we have |
| 10215 | // conflicting information. On the one hand a global |
| 10216 | // symbol and on the other a local call sequence, but |
| 10217 | // don't error for this special case. |
| 10218 | // It isn't possible to cheaply verify we have exactly |
| 10219 | // such a call. Allow all calls to the same section. |
| 10220 | bool ok = false; |
| 10221 | Address code = value; |
| 10222 | if (gsym->source() == Symbol::FROM_OBJECT |
| 10223 | && gsym->object() == object) |
| 10224 | { |
| 10225 | unsigned int dest_shndx = 0; |
| 10226 | if (target->abiversion() < 2) |
| 10227 | { |
| 10228 | Address addend = rela.get_r_addend(); |
| 10229 | code = psymval->value(object, addend); |
| 10230 | target->symval_for_branch(relinfo->symtab, gsym, object, |
| 10231 | &code, &dest_shndx); |
| 10232 | } |
| 10233 | bool is_ordinary; |
| 10234 | if (dest_shndx == 0) |
| 10235 | dest_shndx = gsym->shndx(&is_ordinary); |
| 10236 | ok = dest_shndx == relinfo->data_shndx; |
| 10237 | } |
| 10238 | if (!ok) |
| 10239 | { |
| 10240 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 10241 | _("call lacks nop, can't restore toc; " |
| 10242 | "recompile with -fPIC")); |
| 10243 | value = code; |
| 10244 | } |
| 10245 | } |
| 10246 | } |
| 10247 | } |
| 10248 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
| 10249 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO |
| 10250 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI |
| 10251 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA |
| 10252 | || r_type == elfcpp::R_PPC64_GOT_TLSGD34) |
| 10253 | { |
| 10254 | // First instruction of a global dynamic sequence, arg setup insn. |
| 10255 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
| 10256 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); |
| 10257 | enum Got_type got_type = GOT_TYPE_STANDARD; |
| 10258 | if (tls_type == tls::TLSOPT_NONE) |
| 10259 | got_type = GOT_TYPE_TLSGD; |
| 10260 | else if (tls_type == tls::TLSOPT_TO_IE) |
| 10261 | got_type = GOT_TYPE_TPREL; |
| 10262 | if (got_type != GOT_TYPE_STANDARD) |
| 10263 | { |
| 10264 | if (gsym != NULL) |
| 10265 | { |
| 10266 | gold_assert(gsym->has_got_offset(got_type)); |
| 10267 | value = gsym->got_offset(got_type); |
| 10268 | } |
| 10269 | else |
| 10270 | { |
| 10271 | gold_assert(object->local_has_got_offset(r_sym, got_type)); |
| 10272 | value = object->local_got_offset(r_sym, got_type); |
| 10273 | } |
| 10274 | if (r_type == elfcpp::R_PPC64_GOT_TLSGD34) |
| 10275 | value += target->got_section()->address(); |
| 10276 | else |
| 10277 | value -= target->got_section()->got_base_offset(object); |
| 10278 | } |
| 10279 | if (tls_type == tls::TLSOPT_TO_IE) |
| 10280 | { |
| 10281 | if (r_type == elfcpp::R_PPC64_GOT_TLSGD34) |
| 10282 | { |
| 10283 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10284 | uint64_t pinsn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10285 | pinsn <<= 32; |
| 10286 | pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1); |
| 10287 | // pla -> pld |
| 10288 | pinsn += (-2ULL << 56) + (57ULL << 26) - (14ULL << 26); |
| 10289 | elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32); |
| 10290 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, |
| 10291 | pinsn & 0xffffffff); |
| 10292 | r_type = elfcpp::R_PPC64_GOT_TPREL34; |
| 10293 | } |
| 10294 | else |
| 10295 | { |
| 10296 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
| 10297 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) |
| 10298 | { |
| 10299 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10300 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10301 | insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi |
| 10302 | if (size == 32) |
| 10303 | insn |= 32 << 26; // lwz |
| 10304 | else |
| 10305 | insn |= 58 << 26; // ld |
| 10306 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10307 | } |
| 10308 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 |
| 10309 | - elfcpp::R_POWERPC_GOT_TLSGD16); |
| 10310 | } |
| 10311 | } |
| 10312 | else if (tls_type == tls::TLSOPT_TO_LE) |
| 10313 | { |
| 10314 | if (r_type == elfcpp::R_PPC64_GOT_TLSGD34) |
| 10315 | { |
| 10316 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10317 | uint64_t pinsn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10318 | pinsn <<= 32; |
| 10319 | pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1); |
| 10320 | // pla pcrel -> paddi r13 |
| 10321 | pinsn += (-1ULL << 52) + (13ULL << 16); |
| 10322 | elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32); |
| 10323 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, |
| 10324 | pinsn & 0xffffffff); |
| 10325 | r_type = elfcpp::R_PPC64_TPREL34; |
| 10326 | value = psymval->value(object, rela.get_r_addend()); |
| 10327 | } |
| 10328 | else |
| 10329 | { |
| 10330 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
| 10331 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) |
| 10332 | { |
| 10333 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10334 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10335 | insn &= (1 << 26) - (1 << 21); // extract rt |
| 10336 | if (size == 32) |
| 10337 | insn |= addis_0_2; |
| 10338 | else |
| 10339 | insn |= addis_0_13; |
| 10340 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10341 | r_type = elfcpp::R_POWERPC_TPREL16_HA; |
| 10342 | value = psymval->value(object, rela.get_r_addend()); |
| 10343 | } |
| 10344 | else |
| 10345 | { |
| 10346 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10347 | Insn insn = nop; |
| 10348 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10349 | r_type = elfcpp::R_POWERPC_NONE; |
| 10350 | } |
| 10351 | } |
| 10352 | } |
| 10353 | } |
| 10354 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 |
| 10355 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO |
| 10356 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI |
| 10357 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA |
| 10358 | || r_type == elfcpp::R_PPC64_GOT_TLSLD34) |
| 10359 | { |
| 10360 | // First instruction of a local dynamic sequence, arg setup insn. |
| 10361 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
| 10362 | if (tls_type == tls::TLSOPT_NONE) |
| 10363 | { |
| 10364 | value = target->tlsld_got_offset(); |
| 10365 | if (r_type == elfcpp::R_PPC64_GOT_TLSLD34) |
| 10366 | value += target->got_section()->address(); |
| 10367 | else |
| 10368 | value -= target->got_section()->got_base_offset(object); |
| 10369 | } |
| 10370 | else |
| 10371 | { |
| 10372 | gold_assert(tls_type == tls::TLSOPT_TO_LE); |
| 10373 | if (r_type == elfcpp::R_PPC64_GOT_TLSLD34) |
| 10374 | { |
| 10375 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10376 | uint64_t pinsn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10377 | pinsn <<= 32; |
| 10378 | pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1); |
| 10379 | // pla pcrel -> paddi r13 |
| 10380 | pinsn += (-1ULL << 52) + (13ULL << 16); |
| 10381 | elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32); |
| 10382 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, |
| 10383 | pinsn & 0xffffffff); |
| 10384 | r_type = elfcpp::R_PPC64_TPREL34; |
| 10385 | value = dtp_offset; |
| 10386 | } |
| 10387 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 |
| 10388 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) |
| 10389 | { |
| 10390 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10391 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10392 | insn &= (1 << 26) - (1 << 21); // extract rt |
| 10393 | if (size == 32) |
| 10394 | insn |= addis_0_2; |
| 10395 | else |
| 10396 | insn |= addis_0_13; |
| 10397 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10398 | r_type = elfcpp::R_POWERPC_TPREL16_HA; |
| 10399 | value = dtp_offset; |
| 10400 | } |
| 10401 | else |
| 10402 | { |
| 10403 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10404 | Insn insn = nop; |
| 10405 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10406 | r_type = elfcpp::R_POWERPC_NONE; |
| 10407 | } |
| 10408 | } |
| 10409 | } |
| 10410 | else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16 |
| 10411 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO |
| 10412 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI |
| 10413 | || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA |
| 10414 | || r_type == elfcpp::R_PPC64_GOT_DTPREL34) |
| 10415 | { |
| 10416 | // Accesses relative to a local dynamic sequence address, |
| 10417 | // no optimisation here. |
| 10418 | if (gsym != NULL) |
| 10419 | { |
| 10420 | gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL)); |
| 10421 | value = gsym->got_offset(GOT_TYPE_DTPREL); |
| 10422 | } |
| 10423 | else |
| 10424 | { |
| 10425 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL)); |
| 10426 | value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL); |
| 10427 | } |
| 10428 | if (r_type == elfcpp::R_PPC64_GOT_DTPREL34) |
| 10429 | value += target->got_section()->address(); |
| 10430 | else |
| 10431 | value -= target->got_section()->got_base_offset(object); |
| 10432 | } |
| 10433 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 |
| 10434 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO |
| 10435 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI |
| 10436 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA |
| 10437 | || r_type == elfcpp::R_PPC64_GOT_TPREL34) |
| 10438 | { |
| 10439 | // First instruction of initial exec sequence. |
| 10440 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
| 10441 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); |
| 10442 | if (tls_type == tls::TLSOPT_NONE) |
| 10443 | { |
| 10444 | if (gsym != NULL) |
| 10445 | { |
| 10446 | gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL)); |
| 10447 | value = gsym->got_offset(GOT_TYPE_TPREL); |
| 10448 | } |
| 10449 | else |
| 10450 | { |
| 10451 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL)); |
| 10452 | value = object->local_got_offset(r_sym, GOT_TYPE_TPREL); |
| 10453 | } |
| 10454 | if (r_type == elfcpp::R_PPC64_GOT_TPREL34) |
| 10455 | value += target->got_section()->address(); |
| 10456 | else |
| 10457 | value -= target->got_section()->got_base_offset(object); |
| 10458 | } |
| 10459 | else |
| 10460 | { |
| 10461 | gold_assert(tls_type == tls::TLSOPT_TO_LE); |
| 10462 | if (r_type == elfcpp::R_PPC64_GOT_TPREL34) |
| 10463 | { |
| 10464 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10465 | uint64_t pinsn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10466 | pinsn <<= 32; |
| 10467 | pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1); |
| 10468 | // pld ra,sym@got@tprel@pcrel -> paddi ra,r13,sym@tprel |
| 10469 | pinsn += ((2ULL << 56) + (-1ULL << 52) |
| 10470 | + (14ULL << 26) - (57ULL << 26) + (13ULL << 16)); |
| 10471 | elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32); |
| 10472 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, |
| 10473 | pinsn & 0xffffffff); |
| 10474 | r_type = elfcpp::R_PPC64_TPREL34; |
| 10475 | value = psymval->value(object, rela.get_r_addend()); |
| 10476 | } |
| 10477 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 |
| 10478 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) |
| 10479 | { |
| 10480 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10481 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10482 | insn &= (1 << 26) - (1 << 21); // extract rt from ld |
| 10483 | if (size == 32) |
| 10484 | insn |= addis_0_2; |
| 10485 | else |
| 10486 | insn |= addis_0_13; |
| 10487 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10488 | r_type = elfcpp::R_POWERPC_TPREL16_HA; |
| 10489 | value = psymval->value(object, rela.get_r_addend()); |
| 10490 | } |
| 10491 | else |
| 10492 | { |
| 10493 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10494 | Insn insn = nop; |
| 10495 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10496 | r_type = elfcpp::R_POWERPC_NONE; |
| 10497 | } |
| 10498 | } |
| 10499 | } |
| 10500 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) |
| 10501 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) |
| 10502 | { |
| 10503 | // Second instruction of a global dynamic sequence, |
| 10504 | // the __tls_get_addr call |
| 10505 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
| 10506 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
| 10507 | const tls::Tls_optimization tls_type = target->optimize_tls_gd(final); |
| 10508 | if (tls_type != tls::TLSOPT_NONE) |
| 10509 | { |
| 10510 | if (tls_type == tls::TLSOPT_TO_IE) |
| 10511 | { |
| 10512 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10513 | Insn insn = add_3_3_13; |
| 10514 | if (size == 32) |
| 10515 | insn = add_3_3_2; |
| 10516 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10517 | r_type = elfcpp::R_POWERPC_NONE; |
| 10518 | } |
| 10519 | else |
| 10520 | { |
| 10521 | bool is_pcrel = false; |
| 10522 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 10523 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); |
| 10524 | size_t reloc_count = shdr.get_sh_size() / reloc_size; |
| 10525 | if (relnum < reloc_count - 1) |
| 10526 | { |
| 10527 | Reltype next_rela(preloc + reloc_size); |
| 10528 | unsigned int r_type2 |
| 10529 | = elfcpp::elf_r_type<size>(next_rela.get_r_info()); |
| 10530 | if ((r_type2 == elfcpp::R_PPC64_REL24_NOTOC |
| 10531 | || r_type2 == elfcpp::R_PPC64_PLTCALL_NOTOC) |
| 10532 | && next_rela.get_r_offset() == rela.get_r_offset()) |
| 10533 | is_pcrel = true; |
| 10534 | } |
| 10535 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10536 | if (is_pcrel) |
| 10537 | { |
| 10538 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); |
| 10539 | r_type = elfcpp::R_POWERPC_NONE; |
| 10540 | } |
| 10541 | else |
| 10542 | { |
| 10543 | elfcpp::Swap<32, big_endian>::writeval(iview, addi_3_3); |
| 10544 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
| 10545 | view += d_offset; |
| 10546 | value = psymval->value(object, rela.get_r_addend()); |
| 10547 | } |
| 10548 | } |
| 10549 | this->skip_next_tls_get_addr_call(); |
| 10550 | } |
| 10551 | } |
| 10552 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) |
| 10553 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) |
| 10554 | { |
| 10555 | // Second instruction of a local dynamic sequence, |
| 10556 | // the __tls_get_addr call |
| 10557 | this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset()); |
| 10558 | const tls::Tls_optimization tls_type = target->optimize_tls_ld(); |
| 10559 | if (tls_type == tls::TLSOPT_TO_LE) |
| 10560 | { |
| 10561 | bool is_pcrel = false; |
| 10562 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 10563 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); |
| 10564 | size_t reloc_count = shdr.get_sh_size() / reloc_size; |
| 10565 | if (relnum < reloc_count - 1) |
| 10566 | { |
| 10567 | Reltype next_rela(preloc + reloc_size); |
| 10568 | unsigned int r_type2 |
| 10569 | = elfcpp::elf_r_type<size>(next_rela.get_r_info()); |
| 10570 | if ((r_type2 == elfcpp::R_PPC64_REL24_NOTOC |
| 10571 | || r_type2 == elfcpp::R_PPC64_PLTCALL_NOTOC) |
| 10572 | && next_rela.get_r_offset() == rela.get_r_offset()) |
| 10573 | is_pcrel = true; |
| 10574 | } |
| 10575 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10576 | if (is_pcrel) |
| 10577 | { |
| 10578 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); |
| 10579 | r_type = elfcpp::R_POWERPC_NONE; |
| 10580 | } |
| 10581 | else |
| 10582 | { |
| 10583 | elfcpp::Swap<32, big_endian>::writeval(iview, addi_3_3); |
| 10584 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
| 10585 | view += d_offset; |
| 10586 | value = dtp_offset; |
| 10587 | } |
| 10588 | this->skip_next_tls_get_addr_call(); |
| 10589 | } |
| 10590 | } |
| 10591 | else if (r_type == elfcpp::R_POWERPC_TLS) |
| 10592 | { |
| 10593 | // Second instruction of an initial exec sequence |
| 10594 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
| 10595 | const tls::Tls_optimization tls_type = target->optimize_tls_ie(final); |
| 10596 | if (tls_type == tls::TLSOPT_TO_LE) |
| 10597 | { |
| 10598 | Address roff = rela.get_r_offset() & 3; |
| 10599 | Insn* iview = reinterpret_cast<Insn*>(view - roff); |
| 10600 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10601 | unsigned int reg = size == 32 ? 2 : 13; |
| 10602 | insn = at_tls_transform(insn, reg); |
| 10603 | gold_assert(insn != 0); |
| 10604 | if (roff == 0) |
| 10605 | { |
| 10606 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10607 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
| 10608 | view += d_offset; |
| 10609 | value = psymval->value(object, rela.get_r_addend()); |
| 10610 | } |
| 10611 | else if (roff == 1) |
| 10612 | { |
| 10613 | // For pcrel IE to LE we already have the full offset |
| 10614 | // and thus don't need an addi here. A nop or mr will do. |
| 10615 | if ((insn & (0x3f << 26)) == 14 << 26) |
| 10616 | { |
| 10617 | // Extract regs from addi rt,ra,si. |
| 10618 | unsigned int rt = (insn >> 21) & 0x1f; |
| 10619 | unsigned int ra = (insn >> 16) & 0x1f; |
| 10620 | if (rt == ra) |
| 10621 | insn = nop; |
| 10622 | else |
| 10623 | { |
| 10624 | // Build or ra,rs,rb with rb==rs, ie. mr ra,rs. |
| 10625 | insn = (rt << 16) | (ra << 21) | (ra << 11); |
| 10626 | insn |= (31u << 26) | (444u << 1); |
| 10627 | } |
| 10628 | } |
| 10629 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10630 | r_type = elfcpp::R_POWERPC_NONE; |
| 10631 | } |
| 10632 | } |
| 10633 | } |
| 10634 | else if (!has_stub_value) |
| 10635 | { |
| 10636 | if (!has_plt_offset && (r_type == elfcpp::R_POWERPC_PLTCALL |
| 10637 | || r_type == elfcpp::R_PPC64_PLTCALL_NOTOC)) |
| 10638 | { |
| 10639 | // PLTCALL without plt entry => convert to direct call |
| 10640 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10641 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10642 | insn = (insn & 1) | b; |
| 10643 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10644 | if (size == 32) |
| 10645 | r_type = elfcpp::R_PPC_PLTREL24; |
| 10646 | else if (r_type == elfcpp::R_PPC64_PLTCALL_NOTOC) |
| 10647 | r_type = elfcpp::R_PPC64_REL24_NOTOC; |
| 10648 | else |
| 10649 | r_type = elfcpp::R_POWERPC_REL24; |
| 10650 | } |
| 10651 | Address addend = 0; |
| 10652 | if (!(size == 32 |
| 10653 | && (r_type == elfcpp::R_PPC_PLTREL24 |
| 10654 | || r_type == elfcpp::R_POWERPC_PLT16_LO |
| 10655 | || r_type == elfcpp::R_POWERPC_PLT16_HI |
| 10656 | || r_type == elfcpp::R_POWERPC_PLT16_HA))) |
| 10657 | addend = rela.get_r_addend(); |
| 10658 | value = psymval->value(object, addend); |
| 10659 | if (size == 64 && is_branch_reloc<size>(r_type)) |
| 10660 | { |
| 10661 | if (target->abiversion() >= 2) |
| 10662 | { |
| 10663 | if (gsym != NULL) |
| 10664 | value += object->ppc64_local_entry_offset(gsym); |
| 10665 | else |
| 10666 | value += object->ppc64_local_entry_offset(r_sym); |
| 10667 | } |
| 10668 | else |
| 10669 | { |
| 10670 | unsigned int dest_shndx; |
| 10671 | target->symval_for_branch(relinfo->symtab, gsym, object, |
| 10672 | &value, &dest_shndx); |
| 10673 | } |
| 10674 | } |
| 10675 | Address max_branch_offset = max_branch_delta<size>(r_type); |
| 10676 | if (max_branch_offset != 0 |
| 10677 | && (value - address + max_branch_offset >= 2 * max_branch_offset |
| 10678 | || (size == 64 |
| 10679 | && r_type == elfcpp::R_PPC64_REL24_NOTOC |
| 10680 | && (gsym != NULL |
| 10681 | ? object->ppc64_needs_toc(gsym) |
| 10682 | : object->ppc64_needs_toc(r_sym))))) |
| 10683 | { |
| 10684 | Stub_table<size, big_endian>* stub_table |
| 10685 | = object->stub_table(relinfo->data_shndx); |
| 10686 | if (stub_table != NULL) |
| 10687 | { |
| 10688 | const typename Stub_table<size, big_endian>::Branch_stub_ent* ent |
| 10689 | = stub_table->find_long_branch_entry(object, value); |
| 10690 | if (ent != NULL) |
| 10691 | { |
| 10692 | if (ent->save_res_) |
| 10693 | value = (value - target->savres_section()->address() |
| 10694 | + stub_table->branch_size()); |
| 10695 | else |
| 10696 | value = (stub_table->stub_address() + stub_table->plt_size() |
| 10697 | + ent->off_); |
| 10698 | has_stub_value = true; |
| 10699 | } |
| 10700 | } |
| 10701 | } |
| 10702 | } |
| 10703 | |
| 10704 | switch (r_type) |
| 10705 | { |
| 10706 | case elfcpp::R_PPC64_REL24_NOTOC: |
| 10707 | if (size == 32) |
| 10708 | break; |
| 10709 | // Fall through. |
| 10710 | case elfcpp::R_PPC64_REL64: |
| 10711 | case elfcpp::R_POWERPC_REL32: |
| 10712 | case elfcpp::R_POWERPC_REL24: |
| 10713 | case elfcpp::R_PPC_PLTREL24: |
| 10714 | case elfcpp::R_PPC_LOCAL24PC: |
| 10715 | case elfcpp::R_POWERPC_REL16: |
| 10716 | case elfcpp::R_POWERPC_REL16_LO: |
| 10717 | case elfcpp::R_POWERPC_REL16_HI: |
| 10718 | case elfcpp::R_POWERPC_REL16_HA: |
| 10719 | case elfcpp::R_POWERPC_REL16DX_HA: |
| 10720 | case elfcpp::R_PPC64_REL16_HIGH: |
| 10721 | case elfcpp::R_PPC64_REL16_HIGHA: |
| 10722 | case elfcpp::R_PPC64_REL16_HIGHER: |
| 10723 | case elfcpp::R_PPC64_REL16_HIGHERA: |
| 10724 | case elfcpp::R_PPC64_REL16_HIGHEST: |
| 10725 | case elfcpp::R_PPC64_REL16_HIGHESTA: |
| 10726 | case elfcpp::R_POWERPC_REL14: |
| 10727 | case elfcpp::R_POWERPC_REL14_BRTAKEN: |
| 10728 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: |
| 10729 | case elfcpp::R_PPC64_PCREL34: |
| 10730 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 10731 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 10732 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 10733 | case elfcpp::R_PPC64_PCREL28: |
| 10734 | case elfcpp::R_PPC64_GOT_TLSGD34: |
| 10735 | case elfcpp::R_PPC64_GOT_TLSLD34: |
| 10736 | case elfcpp::R_PPC64_GOT_TPREL34: |
| 10737 | case elfcpp::R_PPC64_GOT_DTPREL34: |
| 10738 | case elfcpp::R_PPC64_REL16_HIGHER34: |
| 10739 | case elfcpp::R_PPC64_REL16_HIGHERA34: |
| 10740 | case elfcpp::R_PPC64_REL16_HIGHEST34: |
| 10741 | case elfcpp::R_PPC64_REL16_HIGHESTA34: |
| 10742 | value -= address; |
| 10743 | break; |
| 10744 | |
| 10745 | case elfcpp::R_PPC64_TOC16: |
| 10746 | case elfcpp::R_PPC64_TOC16_LO: |
| 10747 | case elfcpp::R_PPC64_TOC16_HI: |
| 10748 | case elfcpp::R_PPC64_TOC16_HA: |
| 10749 | case elfcpp::R_PPC64_TOC16_DS: |
| 10750 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 10751 | // Subtract the TOC base address. |
| 10752 | value -= (target->got_section()->output_section()->address() |
| 10753 | + object->toc_base_offset()); |
| 10754 | break; |
| 10755 | |
| 10756 | case elfcpp::R_POWERPC_SECTOFF: |
| 10757 | case elfcpp::R_POWERPC_SECTOFF_LO: |
| 10758 | case elfcpp::R_POWERPC_SECTOFF_HI: |
| 10759 | case elfcpp::R_POWERPC_SECTOFF_HA: |
| 10760 | case elfcpp::R_PPC64_SECTOFF_DS: |
| 10761 | case elfcpp::R_PPC64_SECTOFF_LO_DS: |
| 10762 | if (os != NULL) |
| 10763 | value -= os->address(); |
| 10764 | break; |
| 10765 | |
| 10766 | case elfcpp::R_PPC64_TPREL16_DS: |
| 10767 | case elfcpp::R_PPC64_TPREL16_LO_DS: |
| 10768 | case elfcpp::R_PPC64_TPREL16_HIGH: |
| 10769 | case elfcpp::R_PPC64_TPREL16_HIGHA: |
| 10770 | if (size != 64) |
| 10771 | // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI |
| 10772 | break; |
| 10773 | // Fall through. |
| 10774 | case elfcpp::R_POWERPC_TPREL16: |
| 10775 | case elfcpp::R_POWERPC_TPREL16_LO: |
| 10776 | case elfcpp::R_POWERPC_TPREL16_HI: |
| 10777 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 10778 | case elfcpp::R_POWERPC_TPREL: |
| 10779 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
| 10780 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
| 10781 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
| 10782 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
| 10783 | case elfcpp::R_PPC64_TPREL34: |
| 10784 | // tls symbol values are relative to tls_segment()->vaddr() |
| 10785 | value -= tp_offset; |
| 10786 | break; |
| 10787 | |
| 10788 | case elfcpp::R_PPC64_DTPREL16_DS: |
| 10789 | case elfcpp::R_PPC64_DTPREL16_LO_DS: |
| 10790 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
| 10791 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
| 10792 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
| 10793 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
| 10794 | if (size != 64) |
| 10795 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO |
| 10796 | // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16 |
| 10797 | break; |
| 10798 | // Fall through. |
| 10799 | case elfcpp::R_POWERPC_DTPREL16: |
| 10800 | case elfcpp::R_POWERPC_DTPREL16_LO: |
| 10801 | case elfcpp::R_POWERPC_DTPREL16_HI: |
| 10802 | case elfcpp::R_POWERPC_DTPREL16_HA: |
| 10803 | case elfcpp::R_POWERPC_DTPREL: |
| 10804 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
| 10805 | case elfcpp::R_PPC64_DTPREL16_HIGHA: |
| 10806 | case elfcpp::R_PPC64_DTPREL34: |
| 10807 | // tls symbol values are relative to tls_segment()->vaddr() |
| 10808 | value -= dtp_offset; |
| 10809 | break; |
| 10810 | |
| 10811 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
| 10812 | if (gsym != NULL) |
| 10813 | value += object->ppc64_local_entry_offset(gsym); |
| 10814 | else |
| 10815 | value += object->ppc64_local_entry_offset(r_sym); |
| 10816 | break; |
| 10817 | |
| 10818 | default: |
| 10819 | break; |
| 10820 | } |
| 10821 | |
| 10822 | Insn branch_bit = 0; |
| 10823 | switch (r_type) |
| 10824 | { |
| 10825 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
| 10826 | case elfcpp::R_POWERPC_REL14_BRTAKEN: |
| 10827 | branch_bit = 1 << 21; |
| 10828 | // Fall through. |
| 10829 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
| 10830 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: |
| 10831 | { |
| 10832 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 10833 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10834 | insn &= ~(1 << 21); |
| 10835 | insn |= branch_bit; |
| 10836 | if (this->is_isa_v2) |
| 10837 | { |
| 10838 | // Set 'a' bit. This is 0b00010 in BO field for branch |
| 10839 | // on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| 10840 | // for branch on CTR insns (BO == 1a00t or 1a01t). |
| 10841 | if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| 10842 | insn |= 0x02 << 21; |
| 10843 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| 10844 | insn |= 0x08 << 21; |
| 10845 | else |
| 10846 | break; |
| 10847 | } |
| 10848 | else |
| 10849 | { |
| 10850 | // Invert 'y' bit if not the default. |
| 10851 | if (static_cast<Signed_address>(value) < 0) |
| 10852 | insn ^= 1 << 21; |
| 10853 | } |
| 10854 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10855 | } |
| 10856 | break; |
| 10857 | |
| 10858 | case elfcpp::R_POWERPC_PLT16_HA: |
| 10859 | if (size == 32 |
| 10860 | && !parameters->options().output_is_position_independent()) |
| 10861 | { |
| 10862 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10863 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10864 | |
| 10865 | // Convert addis to lis. |
| 10866 | if ((insn & (0x3f << 26)) == 15u << 26 |
| 10867 | && (insn & (0x1f << 16)) != 0) |
| 10868 | { |
| 10869 | insn &= ~(0x1f << 16); |
| 10870 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10871 | } |
| 10872 | } |
| 10873 | break; |
| 10874 | |
| 10875 | default: |
| 10876 | break; |
| 10877 | } |
| 10878 | |
| 10879 | if (size == 64 |
| 10880 | && (gsym |
| 10881 | ? relative_value_is_known(gsym) |
| 10882 | : relative_value_is_known(psymval))) |
| 10883 | { |
| 10884 | Insn* iview; |
| 10885 | Insn* iview2; |
| 10886 | Insn insn; |
| 10887 | uint64_t pinsn, pinsn2; |
| 10888 | |
| 10889 | switch (r_type) |
| 10890 | { |
| 10891 | default: |
| 10892 | break; |
| 10893 | |
| 10894 | // Multi-instruction sequences that access the GOT/TOC can |
| 10895 | // be optimized, eg. |
| 10896 | // addis ra,r2,x@got@ha; ld rb,x@got@l(ra); |
| 10897 | // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l; |
| 10898 | // and |
| 10899 | // addis ra,r2,0; addi rb,ra,x@toc@l; |
| 10900 | // to nop; addi rb,r2,x@toc; |
| 10901 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
| 10902 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: |
| 10903 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: |
| 10904 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: |
| 10905 | case elfcpp::R_POWERPC_GOT16_HA: |
| 10906 | case elfcpp::R_PPC64_TOC16_HA: |
| 10907 | if (parameters->options().toc_optimize()) |
| 10908 | { |
| 10909 | iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10910 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10911 | if ((r_type == elfcpp::R_PPC64_TOC16_HA |
| 10912 | && object->make_toc_relative(target, &value)) |
| 10913 | || (r_type == elfcpp::R_POWERPC_GOT16_HA |
| 10914 | && object->make_got_relative(target, psymval, |
| 10915 | rela.get_r_addend(), |
| 10916 | &value))) |
| 10917 | { |
| 10918 | gold_assert((insn & ((0x3f << 26) | 0x1f << 16)) |
| 10919 | == ((15u << 26) | (2 << 16))); |
| 10920 | } |
| 10921 | if (((insn & ((0x3f << 26) | 0x1f << 16)) |
| 10922 | == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */) |
| 10923 | && value + 0x8000 < 0x10000) |
| 10924 | { |
| 10925 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); |
| 10926 | return true; |
| 10927 | } |
| 10928 | } |
| 10929 | break; |
| 10930 | |
| 10931 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: |
| 10932 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: |
| 10933 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: |
| 10934 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: |
| 10935 | case elfcpp::R_POWERPC_GOT16_LO: |
| 10936 | case elfcpp::R_PPC64_GOT16_LO_DS: |
| 10937 | case elfcpp::R_PPC64_TOC16_LO: |
| 10938 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 10939 | if (parameters->options().toc_optimize()) |
| 10940 | { |
| 10941 | iview = reinterpret_cast<Insn*>(view - d_offset); |
| 10942 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10943 | bool changed = false; |
| 10944 | if ((r_type == elfcpp::R_PPC64_TOC16_LO_DS |
| 10945 | && object->make_toc_relative(target, &value)) |
| 10946 | || (r_type == elfcpp::R_PPC64_GOT16_LO_DS |
| 10947 | && object->make_got_relative(target, psymval, |
| 10948 | rela.get_r_addend(), |
| 10949 | &value))) |
| 10950 | { |
| 10951 | gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */); |
| 10952 | insn ^= (14u << 26) ^ (58u << 26); |
| 10953 | r_type = elfcpp::R_PPC64_TOC16_LO; |
| 10954 | changed = true; |
| 10955 | } |
| 10956 | if (ok_lo_toc_insn(insn, r_type) |
| 10957 | && value + 0x8000 < 0x10000) |
| 10958 | { |
| 10959 | if ((insn & (0x3f << 26)) == 12u << 26 /* addic */) |
| 10960 | { |
| 10961 | // Transform addic to addi when we change reg. |
| 10962 | insn &= ~((0x3f << 26) | (0x1f << 16)); |
| 10963 | insn |= (14u << 26) | (2 << 16); |
| 10964 | } |
| 10965 | else |
| 10966 | { |
| 10967 | insn &= ~(0x1f << 16); |
| 10968 | insn |= 2 << 16; |
| 10969 | } |
| 10970 | changed = true; |
| 10971 | } |
| 10972 | if (changed) |
| 10973 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 10974 | } |
| 10975 | break; |
| 10976 | |
| 10977 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 10978 | if (parameters->options().toc_optimize()) |
| 10979 | { |
| 10980 | iview = reinterpret_cast<Insn*>(view); |
| 10981 | pinsn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 10982 | pinsn <<= 32; |
| 10983 | pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1); |
| 10984 | if ((pinsn & ((-1ULL << 50) | (63ULL << 26))) |
| 10985 | != ((1ULL << 58) | (1ULL << 52) | (57ULL << 26) /* pld */)) |
| 10986 | break; |
| 10987 | |
| 10988 | Address relval = psymval->value(object, rela.get_r_addend()); |
| 10989 | relval -= address; |
| 10990 | if (relval + (1ULL << 33) < 1ULL << 34) |
| 10991 | { |
| 10992 | value = relval; |
| 10993 | // Replace with paddi |
| 10994 | pinsn += (2ULL << 56) + (14ULL << 26) - (57ULL << 26); |
| 10995 | elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32); |
| 10996 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, |
| 10997 | pinsn & 0xffffffff); |
| 10998 | goto pcrelopt; |
| 10999 | } |
| 11000 | } |
| 11001 | break; |
| 11002 | |
| 11003 | case elfcpp::R_PPC64_PCREL34: |
| 11004 | { |
| 11005 | iview = reinterpret_cast<Insn*>(view); |
| 11006 | pinsn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 11007 | pinsn <<= 32; |
| 11008 | pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1); |
| 11009 | if ((pinsn & ((-1ULL << 50) | (63ULL << 26))) |
| 11010 | != ((1ULL << 58) | (2ULL << 56) | (1ULL << 52) |
| 11011 | | (14ULL << 26) /* paddi */)) |
| 11012 | break; |
| 11013 | |
| 11014 | pcrelopt: |
| 11015 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 11016 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); |
| 11017 | size_t reloc_count = shdr.get_sh_size() / reloc_size; |
| 11018 | if (relnum >= reloc_count - 1) |
| 11019 | break; |
| 11020 | |
| 11021 | Reltype next_rela(preloc + reloc_size); |
| 11022 | if ((elfcpp::elf_r_type<size>(next_rela.get_r_info()) |
| 11023 | != elfcpp::R_PPC64_PCREL_OPT) |
| 11024 | || next_rela.get_r_offset() != rela.get_r_offset()) |
| 11025 | break; |
| 11026 | |
| 11027 | Address off = next_rela.get_r_addend(); |
| 11028 | if (off == 0) |
| 11029 | off = 8; // zero means next insn. |
| 11030 | if (off + rela.get_r_offset() + 4 > view_size) |
| 11031 | break; |
| 11032 | |
| 11033 | iview2 = reinterpret_cast<Insn*>(view + off); |
| 11034 | pinsn2 = elfcpp::Swap<32, big_endian>::readval(iview2); |
| 11035 | pinsn2 <<= 32; |
| 11036 | if ((pinsn2 & (63ULL << 58)) == 1ULL << 58) |
| 11037 | break; |
| 11038 | if (xlate_pcrel_opt(&pinsn, &pinsn2)) |
| 11039 | { |
| 11040 | elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32); |
| 11041 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, |
| 11042 | pinsn & 0xffffffff); |
| 11043 | elfcpp::Swap<32, big_endian>::writeval(iview2, pinsn2 >> 32); |
| 11044 | } |
| 11045 | } |
| 11046 | break; |
| 11047 | |
| 11048 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 11049 | if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000) |
| 11050 | { |
| 11051 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 11052 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 11053 | if ((insn & ((0x3f << 26) | 0x1f << 16)) |
| 11054 | != ((15u << 26) | ((size == 32 ? 2 : 13) << 16))) |
| 11055 | ; |
| 11056 | else |
| 11057 | { |
| 11058 | elfcpp::Swap<32, big_endian>::writeval(iview, nop); |
| 11059 | return true; |
| 11060 | } |
| 11061 | } |
| 11062 | break; |
| 11063 | |
| 11064 | case elfcpp::R_PPC64_TPREL16_LO_DS: |
| 11065 | if (size == 32) |
| 11066 | // R_PPC_TLSGD, R_PPC_TLSLD |
| 11067 | break; |
| 11068 | // Fall through. |
| 11069 | case elfcpp::R_POWERPC_TPREL16_LO: |
| 11070 | if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000) |
| 11071 | { |
| 11072 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 11073 | Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 11074 | insn &= ~(0x1f << 16); |
| 11075 | insn |= (size == 32 ? 2 : 13) << 16; |
| 11076 | elfcpp::Swap<32, big_endian>::writeval(iview, insn); |
| 11077 | } |
| 11078 | break; |
| 11079 | |
| 11080 | case elfcpp::R_PPC64_ENTRY: |
| 11081 | value = (target->got_section()->output_section()->address() |
| 11082 | + object->toc_base_offset()); |
| 11083 | if (value + 0x80008000 <= 0xffffffff |
| 11084 | && !parameters->options().output_is_position_independent()) |
| 11085 | { |
| 11086 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 11087 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); |
| 11088 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); |
| 11089 | |
| 11090 | if ((insn1 & ~0xfffc) == ld_2_12 |
| 11091 | && insn2 == add_2_2_12) |
| 11092 | { |
| 11093 | insn1 = lis_2 + ha(value); |
| 11094 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); |
| 11095 | insn2 = addi_2_2 + l(value); |
| 11096 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); |
| 11097 | return true; |
| 11098 | } |
| 11099 | } |
| 11100 | else |
| 11101 | { |
| 11102 | value -= address; |
| 11103 | if (value + 0x80008000 <= 0xffffffff) |
| 11104 | { |
| 11105 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 11106 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview); |
| 11107 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1); |
| 11108 | |
| 11109 | if ((insn1 & ~0xfffc) == ld_2_12 |
| 11110 | && insn2 == add_2_2_12) |
| 11111 | { |
| 11112 | insn1 = addis_2_12 + ha(value); |
| 11113 | elfcpp::Swap<32, big_endian>::writeval(iview, insn1); |
| 11114 | insn2 = addi_2_2 + l(value); |
| 11115 | elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2); |
| 11116 | return true; |
| 11117 | } |
| 11118 | } |
| 11119 | } |
| 11120 | break; |
| 11121 | |
| 11122 | case elfcpp::R_POWERPC_REL16_LO: |
| 11123 | // If we are generating a non-PIC executable, edit |
| 11124 | // 0: addis 2,12,.TOC.-0b@ha |
| 11125 | // addi 2,2,.TOC.-0b@l |
| 11126 | // used by ELFv2 global entry points to set up r2, to |
| 11127 | // lis 2,.TOC.@ha |
| 11128 | // addi 2,2,.TOC.@l |
| 11129 | // if .TOC. is in range. */ |
| 11130 | if (value + address - 4 + 0x80008000 <= 0xffffffff |
| 11131 | && relnum + 1 > 1 |
| 11132 | && preloc != NULL |
| 11133 | && target->abiversion() >= 2 |
| 11134 | && !parameters->options().output_is_position_independent() |
| 11135 | && rela.get_r_addend() == d_offset + 4 |
| 11136 | && gsym != NULL |
| 11137 | && strcmp(gsym->name(), ".TOC.") == 0) |
| 11138 | { |
| 11139 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 11140 | Reltype prev_rela(preloc - reloc_size); |
| 11141 | if ((prev_rela.get_r_info() |
| 11142 | == elfcpp::elf_r_info<size>(r_sym, |
| 11143 | elfcpp::R_POWERPC_REL16_HA)) |
| 11144 | && prev_rela.get_r_offset() + 4 == rela.get_r_offset() |
| 11145 | && prev_rela.get_r_addend() + 4 == rela.get_r_addend()) |
| 11146 | { |
| 11147 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 11148 | Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1); |
| 11149 | Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview); |
| 11150 | |
| 11151 | if ((insn1 & 0xffff0000) == addis_2_12 |
| 11152 | && (insn2 & 0xffff0000) == addi_2_2) |
| 11153 | { |
| 11154 | insn1 = lis_2 + ha(value + address - 4); |
| 11155 | elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1); |
| 11156 | insn2 = addi_2_2 + l(value + address - 4); |
| 11157 | elfcpp::Swap<32, big_endian>::writeval(iview, insn2); |
| 11158 | if (relinfo->rr) |
| 11159 | { |
| 11160 | relinfo->rr->set_strategy(relnum - 1, |
| 11161 | Relocatable_relocs::RELOC_SPECIAL); |
| 11162 | relinfo->rr->set_strategy(relnum, |
| 11163 | Relocatable_relocs::RELOC_SPECIAL); |
| 11164 | } |
| 11165 | return true; |
| 11166 | } |
| 11167 | } |
| 11168 | } |
| 11169 | break; |
| 11170 | } |
| 11171 | } |
| 11172 | |
| 11173 | typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE; |
| 11174 | elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr); |
| 11175 | switch (r_type) |
| 11176 | { |
| 11177 | case elfcpp::R_POWERPC_ADDR32: |
| 11178 | case elfcpp::R_POWERPC_UADDR32: |
| 11179 | if (size == 64) |
| 11180 | overflow = Reloc::CHECK_BITFIELD; |
| 11181 | break; |
| 11182 | |
| 11183 | case elfcpp::R_POWERPC_REL32: |
| 11184 | case elfcpp::R_POWERPC_REL16DX_HA: |
| 11185 | if (size == 64) |
| 11186 | overflow = Reloc::CHECK_SIGNED; |
| 11187 | break; |
| 11188 | |
| 11189 | case elfcpp::R_POWERPC_UADDR16: |
| 11190 | overflow = Reloc::CHECK_BITFIELD; |
| 11191 | break; |
| 11192 | |
| 11193 | case elfcpp::R_POWERPC_ADDR16: |
| 11194 | // We really should have three separate relocations, |
| 11195 | // one for 16-bit data, one for insns with 16-bit signed fields, |
| 11196 | // and one for insns with 16-bit unsigned fields. |
| 11197 | overflow = Reloc::CHECK_BITFIELD; |
| 11198 | if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) |
| 11199 | overflow = Reloc::CHECK_LOW_INSN; |
| 11200 | break; |
| 11201 | |
| 11202 | case elfcpp::R_POWERPC_ADDR16_HI: |
| 11203 | case elfcpp::R_POWERPC_ADDR16_HA: |
| 11204 | case elfcpp::R_POWERPC_GOT16_HI: |
| 11205 | case elfcpp::R_POWERPC_GOT16_HA: |
| 11206 | case elfcpp::R_POWERPC_PLT16_HI: |
| 11207 | case elfcpp::R_POWERPC_PLT16_HA: |
| 11208 | case elfcpp::R_POWERPC_SECTOFF_HI: |
| 11209 | case elfcpp::R_POWERPC_SECTOFF_HA: |
| 11210 | case elfcpp::R_PPC64_TOC16_HI: |
| 11211 | case elfcpp::R_PPC64_TOC16_HA: |
| 11212 | case elfcpp::R_PPC64_PLTGOT16_HI: |
| 11213 | case elfcpp::R_PPC64_PLTGOT16_HA: |
| 11214 | case elfcpp::R_POWERPC_TPREL16_HI: |
| 11215 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 11216 | case elfcpp::R_POWERPC_DTPREL16_HI: |
| 11217 | case elfcpp::R_POWERPC_DTPREL16_HA: |
| 11218 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: |
| 11219 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: |
| 11220 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: |
| 11221 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
| 11222 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: |
| 11223 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: |
| 11224 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: |
| 11225 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: |
| 11226 | case elfcpp::R_POWERPC_REL16_HI: |
| 11227 | case elfcpp::R_POWERPC_REL16_HA: |
| 11228 | if (size != 32) |
| 11229 | overflow = Reloc::CHECK_HIGH_INSN; |
| 11230 | break; |
| 11231 | |
| 11232 | case elfcpp::R_POWERPC_REL16: |
| 11233 | case elfcpp::R_PPC64_TOC16: |
| 11234 | case elfcpp::R_POWERPC_GOT16: |
| 11235 | case elfcpp::R_POWERPC_SECTOFF: |
| 11236 | case elfcpp::R_POWERPC_TPREL16: |
| 11237 | case elfcpp::R_POWERPC_DTPREL16: |
| 11238 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
| 11239 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
| 11240 | case elfcpp::R_POWERPC_GOT_TPREL16: |
| 11241 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
| 11242 | overflow = Reloc::CHECK_LOW_INSN; |
| 11243 | break; |
| 11244 | |
| 11245 | case elfcpp::R_PPC64_REL24_NOTOC: |
| 11246 | if (size == 32) |
| 11247 | break; |
| 11248 | // Fall through. |
| 11249 | case elfcpp::R_POWERPC_ADDR24: |
| 11250 | case elfcpp::R_POWERPC_ADDR14: |
| 11251 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
| 11252 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
| 11253 | case elfcpp::R_PPC64_ADDR16_DS: |
| 11254 | case elfcpp::R_POWERPC_REL24: |
| 11255 | case elfcpp::R_PPC_PLTREL24: |
| 11256 | case elfcpp::R_PPC_LOCAL24PC: |
| 11257 | case elfcpp::R_PPC64_TPREL16_DS: |
| 11258 | case elfcpp::R_PPC64_DTPREL16_DS: |
| 11259 | case elfcpp::R_PPC64_TOC16_DS: |
| 11260 | case elfcpp::R_PPC64_GOT16_DS: |
| 11261 | case elfcpp::R_PPC64_SECTOFF_DS: |
| 11262 | case elfcpp::R_POWERPC_REL14: |
| 11263 | case elfcpp::R_POWERPC_REL14_BRTAKEN: |
| 11264 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: |
| 11265 | case elfcpp::R_PPC64_D34: |
| 11266 | case elfcpp::R_PPC64_PCREL34: |
| 11267 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 11268 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 11269 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 11270 | case elfcpp::R_PPC64_D28: |
| 11271 | case elfcpp::R_PPC64_PCREL28: |
| 11272 | case elfcpp::R_PPC64_TPREL34: |
| 11273 | case elfcpp::R_PPC64_DTPREL34: |
| 11274 | case elfcpp::R_PPC64_GOT_TLSGD34: |
| 11275 | case elfcpp::R_PPC64_GOT_TLSLD34: |
| 11276 | case elfcpp::R_PPC64_GOT_TPREL34: |
| 11277 | case elfcpp::R_PPC64_GOT_DTPREL34: |
| 11278 | overflow = Reloc::CHECK_SIGNED; |
| 11279 | break; |
| 11280 | } |
| 11281 | |
| 11282 | Insn* iview = reinterpret_cast<Insn*>(view - d_offset); |
| 11283 | Insn insn = 0; |
| 11284 | |
| 11285 | if (overflow == Reloc::CHECK_LOW_INSN |
| 11286 | || overflow == Reloc::CHECK_HIGH_INSN) |
| 11287 | { |
| 11288 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 11289 | |
| 11290 | if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) |
| 11291 | overflow = Reloc::CHECK_BITFIELD; |
| 11292 | else if (overflow == Reloc::CHECK_LOW_INSN |
| 11293 | ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ |
| 11294 | || (insn & (0x3f << 26)) == 24u << 26 /* ori */ |
| 11295 | || (insn & (0x3f << 26)) == 26u << 26 /* xori */) |
| 11296 | : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ |
| 11297 | || (insn & (0x3f << 26)) == 25u << 26 /* oris */ |
| 11298 | || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) |
| 11299 | overflow = Reloc::CHECK_UNSIGNED; |
| 11300 | else |
| 11301 | overflow = Reloc::CHECK_SIGNED; |
| 11302 | } |
| 11303 | |
| 11304 | bool maybe_dq_reloc = false; |
| 11305 | typename Powerpc_relocate_functions<size, big_endian>::Status status |
| 11306 | = Powerpc_relocate_functions<size, big_endian>::STATUS_OK; |
| 11307 | switch (r_type) |
| 11308 | { |
| 11309 | case elfcpp::R_POWERPC_NONE: |
| 11310 | case elfcpp::R_POWERPC_TLS: |
| 11311 | case elfcpp::R_POWERPC_GNU_VTINHERIT: |
| 11312 | case elfcpp::R_POWERPC_GNU_VTENTRY: |
| 11313 | case elfcpp::R_POWERPC_PLTSEQ: |
| 11314 | case elfcpp::R_POWERPC_PLTCALL: |
| 11315 | case elfcpp::R_PPC64_PLTSEQ_NOTOC: |
| 11316 | case elfcpp::R_PPC64_PLTCALL_NOTOC: |
| 11317 | case elfcpp::R_PPC64_PCREL_OPT: |
| 11318 | break; |
| 11319 | |
| 11320 | case elfcpp::R_PPC64_ADDR64: |
| 11321 | case elfcpp::R_PPC64_REL64: |
| 11322 | case elfcpp::R_PPC64_TOC: |
| 11323 | case elfcpp::R_PPC64_ADDR64_LOCAL: |
| 11324 | Reloc::addr64(view, value); |
| 11325 | break; |
| 11326 | |
| 11327 | case elfcpp::R_POWERPC_TPREL: |
| 11328 | case elfcpp::R_POWERPC_DTPREL: |
| 11329 | if (size == 64) |
| 11330 | Reloc::addr64(view, value); |
| 11331 | else |
| 11332 | status = Reloc::addr32(view, value, overflow); |
| 11333 | break; |
| 11334 | |
| 11335 | case elfcpp::R_PPC64_UADDR64: |
| 11336 | Reloc::addr64_u(view, value); |
| 11337 | break; |
| 11338 | |
| 11339 | case elfcpp::R_POWERPC_ADDR32: |
| 11340 | status = Reloc::addr32(view, value, overflow); |
| 11341 | break; |
| 11342 | |
| 11343 | case elfcpp::R_POWERPC_REL32: |
| 11344 | case elfcpp::R_POWERPC_UADDR32: |
| 11345 | status = Reloc::addr32_u(view, value, overflow); |
| 11346 | break; |
| 11347 | |
| 11348 | case elfcpp::R_PPC64_REL24_NOTOC: |
| 11349 | if (size == 32) |
| 11350 | goto unsupp; // R_PPC_EMB_RELSDA |
| 11351 | // Fall through. |
| 11352 | case elfcpp::R_POWERPC_ADDR24: |
| 11353 | case elfcpp::R_POWERPC_REL24: |
| 11354 | case elfcpp::R_PPC_PLTREL24: |
| 11355 | case elfcpp::R_PPC_LOCAL24PC: |
| 11356 | status = Reloc::addr24(view, value, overflow); |
| 11357 | break; |
| 11358 | |
| 11359 | case elfcpp::R_POWERPC_GOT_DTPREL16: |
| 11360 | case elfcpp::R_POWERPC_GOT_DTPREL16_LO: |
| 11361 | case elfcpp::R_POWERPC_GOT_TPREL16: |
| 11362 | case elfcpp::R_POWERPC_GOT_TPREL16_LO: |
| 11363 | if (size == 64) |
| 11364 | { |
| 11365 | // On ppc64 these are all ds form |
| 11366 | maybe_dq_reloc = true; |
| 11367 | break; |
| 11368 | } |
| 11369 | // Fall through. |
| 11370 | case elfcpp::R_POWERPC_ADDR16: |
| 11371 | case elfcpp::R_POWERPC_REL16: |
| 11372 | case elfcpp::R_PPC64_TOC16: |
| 11373 | case elfcpp::R_POWERPC_GOT16: |
| 11374 | case elfcpp::R_POWERPC_SECTOFF: |
| 11375 | case elfcpp::R_POWERPC_TPREL16: |
| 11376 | case elfcpp::R_POWERPC_DTPREL16: |
| 11377 | case elfcpp::R_POWERPC_GOT_TLSGD16: |
| 11378 | case elfcpp::R_POWERPC_GOT_TLSLD16: |
| 11379 | case elfcpp::R_POWERPC_ADDR16_LO: |
| 11380 | case elfcpp::R_POWERPC_REL16_LO: |
| 11381 | case elfcpp::R_PPC64_TOC16_LO: |
| 11382 | case elfcpp::R_POWERPC_GOT16_LO: |
| 11383 | case elfcpp::R_POWERPC_PLT16_LO: |
| 11384 | case elfcpp::R_POWERPC_SECTOFF_LO: |
| 11385 | case elfcpp::R_POWERPC_TPREL16_LO: |
| 11386 | case elfcpp::R_POWERPC_DTPREL16_LO: |
| 11387 | case elfcpp::R_POWERPC_GOT_TLSGD16_LO: |
| 11388 | case elfcpp::R_POWERPC_GOT_TLSLD16_LO: |
| 11389 | if (size == 64) |
| 11390 | status = Reloc::addr16(view, value, overflow); |
| 11391 | else |
| 11392 | maybe_dq_reloc = true; |
| 11393 | break; |
| 11394 | |
| 11395 | case elfcpp::R_POWERPC_UADDR16: |
| 11396 | status = Reloc::addr16_u(view, value, overflow); |
| 11397 | break; |
| 11398 | |
| 11399 | case elfcpp::R_PPC64_ADDR16_HIGH: |
| 11400 | case elfcpp::R_PPC64_TPREL16_HIGH: |
| 11401 | case elfcpp::R_PPC64_DTPREL16_HIGH: |
| 11402 | if (size == 32) |
| 11403 | // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA |
| 11404 | goto unsupp; |
| 11405 | // Fall through. |
| 11406 | case elfcpp::R_POWERPC_ADDR16_HI: |
| 11407 | case elfcpp::R_POWERPC_REL16_HI: |
| 11408 | case elfcpp::R_PPC64_REL16_HIGH: |
| 11409 | case elfcpp::R_PPC64_TOC16_HI: |
| 11410 | case elfcpp::R_POWERPC_GOT16_HI: |
| 11411 | case elfcpp::R_POWERPC_PLT16_HI: |
| 11412 | case elfcpp::R_POWERPC_SECTOFF_HI: |
| 11413 | case elfcpp::R_POWERPC_TPREL16_HI: |
| 11414 | case elfcpp::R_POWERPC_DTPREL16_HI: |
| 11415 | case elfcpp::R_POWERPC_GOT_TLSGD16_HI: |
| 11416 | case elfcpp::R_POWERPC_GOT_TLSLD16_HI: |
| 11417 | case elfcpp::R_POWERPC_GOT_TPREL16_HI: |
| 11418 | case elfcpp::R_POWERPC_GOT_DTPREL16_HI: |
| 11419 | Reloc::addr16_hi(view, value); |
| 11420 | break; |
| 11421 | |
| 11422 | case elfcpp::R_PPC64_ADDR16_HIGHA: |
| 11423 | case elfcpp::R_PPC64_TPREL16_HIGHA: |
| 11424 | case elfcpp::R_PPC64_DTPREL16_HIGHA: |
| 11425 | if (size == 32) |
| 11426 | // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD |
| 11427 | goto unsupp; |
| 11428 | // Fall through. |
| 11429 | case elfcpp::R_POWERPC_ADDR16_HA: |
| 11430 | case elfcpp::R_POWERPC_REL16_HA: |
| 11431 | case elfcpp::R_PPC64_REL16_HIGHA: |
| 11432 | case elfcpp::R_PPC64_TOC16_HA: |
| 11433 | case elfcpp::R_POWERPC_GOT16_HA: |
| 11434 | case elfcpp::R_POWERPC_PLT16_HA: |
| 11435 | case elfcpp::R_POWERPC_SECTOFF_HA: |
| 11436 | case elfcpp::R_POWERPC_TPREL16_HA: |
| 11437 | case elfcpp::R_POWERPC_DTPREL16_HA: |
| 11438 | case elfcpp::R_POWERPC_GOT_TLSGD16_HA: |
| 11439 | case elfcpp::R_POWERPC_GOT_TLSLD16_HA: |
| 11440 | case elfcpp::R_POWERPC_GOT_TPREL16_HA: |
| 11441 | case elfcpp::R_POWERPC_GOT_DTPREL16_HA: |
| 11442 | Reloc::addr16_ha(view, value); |
| 11443 | break; |
| 11444 | |
| 11445 | case elfcpp::R_POWERPC_REL16DX_HA: |
| 11446 | status = Reloc::addr16dx_ha(view, value, overflow); |
| 11447 | break; |
| 11448 | |
| 11449 | case elfcpp::R_PPC64_DTPREL16_HIGHER: |
| 11450 | if (size == 32) |
| 11451 | // R_PPC_EMB_NADDR16_LO |
| 11452 | goto unsupp; |
| 11453 | // Fall through. |
| 11454 | case elfcpp::R_PPC64_ADDR16_HIGHER: |
| 11455 | case elfcpp::R_PPC64_REL16_HIGHER: |
| 11456 | case elfcpp::R_PPC64_TPREL16_HIGHER: |
| 11457 | Reloc::addr16_hi2(view, value); |
| 11458 | break; |
| 11459 | |
| 11460 | case elfcpp::R_PPC64_DTPREL16_HIGHERA: |
| 11461 | if (size == 32) |
| 11462 | // R_PPC_EMB_NADDR16_HI |
| 11463 | goto unsupp; |
| 11464 | // Fall through. |
| 11465 | case elfcpp::R_PPC64_ADDR16_HIGHERA: |
| 11466 | case elfcpp::R_PPC64_REL16_HIGHERA: |
| 11467 | case elfcpp::R_PPC64_TPREL16_HIGHERA: |
| 11468 | Reloc::addr16_ha2(view, value); |
| 11469 | break; |
| 11470 | |
| 11471 | case elfcpp::R_PPC64_DTPREL16_HIGHEST: |
| 11472 | if (size == 32) |
| 11473 | // R_PPC_EMB_NADDR16_HA |
| 11474 | goto unsupp; |
| 11475 | // Fall through. |
| 11476 | case elfcpp::R_PPC64_ADDR16_HIGHEST: |
| 11477 | case elfcpp::R_PPC64_REL16_HIGHEST: |
| 11478 | case elfcpp::R_PPC64_TPREL16_HIGHEST: |
| 11479 | Reloc::addr16_hi3(view, value); |
| 11480 | break; |
| 11481 | |
| 11482 | case elfcpp::R_PPC64_DTPREL16_HIGHESTA: |
| 11483 | if (size == 32) |
| 11484 | // R_PPC_EMB_SDAI16 |
| 11485 | goto unsupp; |
| 11486 | // Fall through. |
| 11487 | case elfcpp::R_PPC64_ADDR16_HIGHESTA: |
| 11488 | case elfcpp::R_PPC64_REL16_HIGHESTA: |
| 11489 | case elfcpp::R_PPC64_TPREL16_HIGHESTA: |
| 11490 | Reloc::addr16_ha3(view, value); |
| 11491 | break; |
| 11492 | |
| 11493 | case elfcpp::R_PPC64_DTPREL16_DS: |
| 11494 | case elfcpp::R_PPC64_DTPREL16_LO_DS: |
| 11495 | if (size == 32) |
| 11496 | // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16 |
| 11497 | goto unsupp; |
| 11498 | // Fall through. |
| 11499 | case elfcpp::R_PPC64_TPREL16_DS: |
| 11500 | case elfcpp::R_PPC64_TPREL16_LO_DS: |
| 11501 | if (size == 32) |
| 11502 | // R_PPC_TLSGD, R_PPC_TLSLD |
| 11503 | break; |
| 11504 | // Fall through. |
| 11505 | case elfcpp::R_PPC64_ADDR16_DS: |
| 11506 | case elfcpp::R_PPC64_ADDR16_LO_DS: |
| 11507 | case elfcpp::R_PPC64_TOC16_DS: |
| 11508 | case elfcpp::R_PPC64_TOC16_LO_DS: |
| 11509 | case elfcpp::R_PPC64_GOT16_DS: |
| 11510 | case elfcpp::R_PPC64_GOT16_LO_DS: |
| 11511 | case elfcpp::R_PPC64_PLT16_LO_DS: |
| 11512 | case elfcpp::R_PPC64_SECTOFF_DS: |
| 11513 | case elfcpp::R_PPC64_SECTOFF_LO_DS: |
| 11514 | maybe_dq_reloc = true; |
| 11515 | break; |
| 11516 | |
| 11517 | case elfcpp::R_POWERPC_ADDR14: |
| 11518 | case elfcpp::R_POWERPC_ADDR14_BRTAKEN: |
| 11519 | case elfcpp::R_POWERPC_ADDR14_BRNTAKEN: |
| 11520 | case elfcpp::R_POWERPC_REL14: |
| 11521 | case elfcpp::R_POWERPC_REL14_BRTAKEN: |
| 11522 | case elfcpp::R_POWERPC_REL14_BRNTAKEN: |
| 11523 | status = Reloc::addr14(view, value, overflow); |
| 11524 | break; |
| 11525 | |
| 11526 | case elfcpp::R_POWERPC_COPY: |
| 11527 | case elfcpp::R_POWERPC_GLOB_DAT: |
| 11528 | case elfcpp::R_POWERPC_JMP_SLOT: |
| 11529 | case elfcpp::R_POWERPC_RELATIVE: |
| 11530 | case elfcpp::R_POWERPC_DTPMOD: |
| 11531 | case elfcpp::R_PPC64_JMP_IREL: |
| 11532 | case elfcpp::R_POWERPC_IRELATIVE: |
| 11533 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 11534 | _("unexpected reloc %u in object file"), |
| 11535 | r_type); |
| 11536 | break; |
| 11537 | |
| 11538 | case elfcpp::R_PPC64_TOCSAVE: |
| 11539 | if (size == 32) |
| 11540 | // R_PPC_EMB_SDA21 |
| 11541 | goto unsupp; |
| 11542 | else |
| 11543 | { |
| 11544 | Symbol_location loc; |
| 11545 | loc.object = relinfo->object; |
| 11546 | loc.shndx = relinfo->data_shndx; |
| 11547 | loc.offset = rela.get_r_offset(); |
| 11548 | Tocsave_loc::const_iterator p = target->tocsave_loc().find(loc); |
| 11549 | if (p != target->tocsave_loc().end()) |
| 11550 | { |
| 11551 | // If we've generated plt calls using this tocsave, then |
| 11552 | // the nop needs to be changed to save r2. |
| 11553 | Insn* iview = reinterpret_cast<Insn*>(view); |
| 11554 | if (elfcpp::Swap<32, big_endian>::readval(iview) == nop) |
| 11555 | elfcpp::Swap<32, big_endian>:: |
| 11556 | writeval(iview, std_2_1 + target->stk_toc()); |
| 11557 | } |
| 11558 | } |
| 11559 | break; |
| 11560 | |
| 11561 | case elfcpp::R_PPC_EMB_SDA2I16: |
| 11562 | case elfcpp::R_PPC_EMB_SDA2REL: |
| 11563 | if (size == 32) |
| 11564 | goto unsupp; |
| 11565 | // R_PPC64_TLSGD, R_PPC64_TLSLD |
| 11566 | break; |
| 11567 | |
| 11568 | case elfcpp::R_PPC64_D34: |
| 11569 | case elfcpp::R_PPC64_D34_LO: |
| 11570 | case elfcpp::R_PPC64_PCREL34: |
| 11571 | case elfcpp::R_PPC64_GOT_PCREL34: |
| 11572 | case elfcpp::R_PPC64_PLT_PCREL34: |
| 11573 | case elfcpp::R_PPC64_PLT_PCREL34_NOTOC: |
| 11574 | case elfcpp::R_PPC64_TPREL34: |
| 11575 | case elfcpp::R_PPC64_DTPREL34: |
| 11576 | case elfcpp::R_PPC64_GOT_TLSGD34: |
| 11577 | case elfcpp::R_PPC64_GOT_TLSLD34: |
| 11578 | case elfcpp::R_PPC64_GOT_TPREL34: |
| 11579 | case elfcpp::R_PPC64_GOT_DTPREL34: |
| 11580 | if (size == 32) |
| 11581 | goto unsupp; |
| 11582 | status = Reloc::addr34(view, value, overflow); |
| 11583 | break; |
| 11584 | |
| 11585 | case elfcpp::R_PPC64_D34_HI30: |
| 11586 | if (size == 32) |
| 11587 | goto unsupp; |
| 11588 | Reloc::addr34_hi(view, value); |
| 11589 | break; |
| 11590 | |
| 11591 | case elfcpp::R_PPC64_D34_HA30: |
| 11592 | if (size == 32) |
| 11593 | goto unsupp; |
| 11594 | Reloc::addr34_ha(view, value); |
| 11595 | break; |
| 11596 | |
| 11597 | case elfcpp::R_PPC64_D28: |
| 11598 | case elfcpp::R_PPC64_PCREL28: |
| 11599 | if (size == 32) |
| 11600 | goto unsupp; |
| 11601 | status = Reloc::addr28(view, value, overflow); |
| 11602 | break; |
| 11603 | |
| 11604 | case elfcpp::R_PPC64_ADDR16_HIGHER34: |
| 11605 | case elfcpp::R_PPC64_REL16_HIGHER34: |
| 11606 | if (size == 32) |
| 11607 | goto unsupp; |
| 11608 | Reloc::addr16_higher34(view, value); |
| 11609 | break; |
| 11610 | |
| 11611 | case elfcpp::R_PPC64_ADDR16_HIGHERA34: |
| 11612 | case elfcpp::R_PPC64_REL16_HIGHERA34: |
| 11613 | if (size == 32) |
| 11614 | goto unsupp; |
| 11615 | Reloc::addr16_highera34(view, value); |
| 11616 | break; |
| 11617 | |
| 11618 | case elfcpp::R_PPC64_ADDR16_HIGHEST34: |
| 11619 | case elfcpp::R_PPC64_REL16_HIGHEST34: |
| 11620 | if (size == 32) |
| 11621 | goto unsupp; |
| 11622 | Reloc::addr16_highest34(view, value); |
| 11623 | break; |
| 11624 | |
| 11625 | case elfcpp::R_PPC64_ADDR16_HIGHESTA34: |
| 11626 | case elfcpp::R_PPC64_REL16_HIGHESTA34: |
| 11627 | if (size == 32) |
| 11628 | goto unsupp; |
| 11629 | Reloc::addr16_highesta34(view, value); |
| 11630 | break; |
| 11631 | |
| 11632 | case elfcpp::R_POWERPC_PLT32: |
| 11633 | case elfcpp::R_POWERPC_PLTREL32: |
| 11634 | case elfcpp::R_PPC_SDAREL16: |
| 11635 | case elfcpp::R_POWERPC_ADDR30: |
| 11636 | case elfcpp::R_PPC64_PLT64: |
| 11637 | case elfcpp::R_PPC64_PLTREL64: |
| 11638 | case elfcpp::R_PPC64_PLTGOT16: |
| 11639 | case elfcpp::R_PPC64_PLTGOT16_LO: |
| 11640 | case elfcpp::R_PPC64_PLTGOT16_HI: |
| 11641 | case elfcpp::R_PPC64_PLTGOT16_HA: |
| 11642 | case elfcpp::R_PPC64_PLTGOT16_DS: |
| 11643 | case elfcpp::R_PPC64_PLTGOT16_LO_DS: |
| 11644 | case elfcpp::R_PPC_TOC16: |
| 11645 | default: |
| 11646 | unsupp: |
| 11647 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 11648 | _("unsupported reloc %u"), |
| 11649 | r_type); |
| 11650 | break; |
| 11651 | } |
| 11652 | |
| 11653 | if (maybe_dq_reloc) |
| 11654 | { |
| 11655 | if (insn == 0) |
| 11656 | insn = elfcpp::Swap<32, big_endian>::readval(iview); |
| 11657 | |
| 11658 | if ((insn & (0x3f << 26)) == 56u << 26 /* lq */ |
| 11659 | || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ |
| 11660 | && (insn & 3) == 1)) |
| 11661 | status = Reloc::addr16_dq(view, value, overflow); |
| 11662 | else if (size == 64 |
| 11663 | || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ |
| 11664 | || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ |
| 11665 | || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ |
| 11666 | || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */) |
| 11667 | status = Reloc::addr16_ds(view, value, overflow); |
| 11668 | else |
| 11669 | status = Reloc::addr16(view, value, overflow); |
| 11670 | } |
| 11671 | |
| 11672 | if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK |
| 11673 | && (has_stub_value |
| 11674 | || !(gsym != NULL |
| 11675 | && gsym->is_undefined() |
| 11676 | && is_branch_reloc<size>(r_type)))) |
| 11677 | { |
| 11678 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| 11679 | _("relocation overflow")); |
| 11680 | if (has_stub_value) |
| 11681 | gold_info(_("try relinking with a smaller --stub-group-size")); |
| 11682 | } |
| 11683 | |
| 11684 | return true; |
| 11685 | } |
| 11686 | |
| 11687 | // Relocate section data. |
| 11688 | |
| 11689 | template<int size, bool big_endian> |
| 11690 | void |
| 11691 | Target_powerpc<size, big_endian>::relocate_section( |
| 11692 | const Relocate_info<size, big_endian>* relinfo, |
| 11693 | unsigned int sh_type, |
| 11694 | const unsigned char* prelocs, |
| 11695 | size_t reloc_count, |
| 11696 | Output_section* output_section, |
| 11697 | bool needs_special_offset_handling, |
| 11698 | unsigned char* view, |
| 11699 | Address address, |
| 11700 | section_size_type view_size, |
| 11701 | const Reloc_symbol_changes* reloc_symbol_changes) |
| 11702 | { |
| 11703 | typedef Target_powerpc<size, big_endian> Powerpc; |
| 11704 | typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate; |
| 11705 | typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior |
| 11706 | Powerpc_comdat_behavior; |
| 11707 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 11708 | Classify_reloc; |
| 11709 | |
| 11710 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 11711 | |
| 11712 | gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate, |
| 11713 | Powerpc_comdat_behavior, Classify_reloc>( |
| 11714 | relinfo, |
| 11715 | this, |
| 11716 | prelocs, |
| 11717 | reloc_count, |
| 11718 | output_section, |
| 11719 | needs_special_offset_handling, |
| 11720 | view, |
| 11721 | address, |
| 11722 | view_size, |
| 11723 | reloc_symbol_changes); |
| 11724 | } |
| 11725 | |
| 11726 | template<int size, bool big_endian> |
| 11727 | class Powerpc_scan_relocatable_reloc |
| 11728 | { |
| 11729 | public: |
| 11730 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
| 11731 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 11732 | static const int sh_type = elfcpp::SHT_RELA; |
| 11733 | |
| 11734 | // Return the symbol referred to by the relocation. |
| 11735 | static inline unsigned int |
| 11736 | get_r_sym(const Reltype* reloc) |
| 11737 | { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); } |
| 11738 | |
| 11739 | // Return the type of the relocation. |
| 11740 | static inline unsigned int |
| 11741 | get_r_type(const Reltype* reloc) |
| 11742 | { return elfcpp::elf_r_type<size>(reloc->get_r_info()); } |
| 11743 | |
| 11744 | // Return the strategy to use for a local symbol which is not a |
| 11745 | // section symbol, given the relocation type. |
| 11746 | inline Relocatable_relocs::Reloc_strategy |
| 11747 | local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym) |
| 11748 | { |
| 11749 | if (r_type == 0 && r_sym == 0) |
| 11750 | return Relocatable_relocs::RELOC_DISCARD; |
| 11751 | return Relocatable_relocs::RELOC_COPY; |
| 11752 | } |
| 11753 | |
| 11754 | // Return the strategy to use for a local symbol which is a section |
| 11755 | // symbol, given the relocation type. |
| 11756 | inline Relocatable_relocs::Reloc_strategy |
| 11757 | local_section_strategy(unsigned int, Relobj*) |
| 11758 | { |
| 11759 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; |
| 11760 | } |
| 11761 | |
| 11762 | // Return the strategy to use for a global symbol, given the |
| 11763 | // relocation type, the object, and the symbol index. |
| 11764 | inline Relocatable_relocs::Reloc_strategy |
| 11765 | global_strategy(unsigned int r_type, Relobj*, unsigned int) |
| 11766 | { |
| 11767 | if (size == 32 |
| 11768 | && (r_type == elfcpp::R_PPC_PLTREL24 |
| 11769 | || r_type == elfcpp::R_POWERPC_PLT16_LO |
| 11770 | || r_type == elfcpp::R_POWERPC_PLT16_HI |
| 11771 | || r_type == elfcpp::R_POWERPC_PLT16_HA)) |
| 11772 | return Relocatable_relocs::RELOC_SPECIAL; |
| 11773 | return Relocatable_relocs::RELOC_COPY; |
| 11774 | } |
| 11775 | }; |
| 11776 | |
| 11777 | // Scan the relocs during a relocatable link. |
| 11778 | |
| 11779 | template<int size, bool big_endian> |
| 11780 | void |
| 11781 | Target_powerpc<size, big_endian>::scan_relocatable_relocs( |
| 11782 | Symbol_table* symtab, |
| 11783 | Layout* layout, |
| 11784 | Sized_relobj_file<size, big_endian>* object, |
| 11785 | unsigned int data_shndx, |
| 11786 | unsigned int sh_type, |
| 11787 | const unsigned char* prelocs, |
| 11788 | size_t reloc_count, |
| 11789 | Output_section* output_section, |
| 11790 | bool needs_special_offset_handling, |
| 11791 | size_t local_symbol_count, |
| 11792 | const unsigned char* plocal_symbols, |
| 11793 | Relocatable_relocs* rr) |
| 11794 | { |
| 11795 | typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy; |
| 11796 | |
| 11797 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 11798 | |
| 11799 | gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>( |
| 11800 | symtab, |
| 11801 | layout, |
| 11802 | object, |
| 11803 | data_shndx, |
| 11804 | prelocs, |
| 11805 | reloc_count, |
| 11806 | output_section, |
| 11807 | needs_special_offset_handling, |
| 11808 | local_symbol_count, |
| 11809 | plocal_symbols, |
| 11810 | rr); |
| 11811 | } |
| 11812 | |
| 11813 | // Scan the relocs for --emit-relocs. |
| 11814 | |
| 11815 | template<int size, bool big_endian> |
| 11816 | void |
| 11817 | Target_powerpc<size, big_endian>::emit_relocs_scan( |
| 11818 | Symbol_table* symtab, |
| 11819 | Layout* layout, |
| 11820 | Sized_relobj_file<size, big_endian>* object, |
| 11821 | unsigned int data_shndx, |
| 11822 | unsigned int sh_type, |
| 11823 | const unsigned char* prelocs, |
| 11824 | size_t reloc_count, |
| 11825 | Output_section* output_section, |
| 11826 | bool needs_special_offset_handling, |
| 11827 | size_t local_symbol_count, |
| 11828 | const unsigned char* plocal_syms, |
| 11829 | Relocatable_relocs* rr) |
| 11830 | { |
| 11831 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| 11832 | Classify_reloc; |
| 11833 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> |
| 11834 | Emit_relocs_strategy; |
| 11835 | |
| 11836 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 11837 | |
| 11838 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( |
| 11839 | symtab, |
| 11840 | layout, |
| 11841 | object, |
| 11842 | data_shndx, |
| 11843 | prelocs, |
| 11844 | reloc_count, |
| 11845 | output_section, |
| 11846 | needs_special_offset_handling, |
| 11847 | local_symbol_count, |
| 11848 | plocal_syms, |
| 11849 | rr); |
| 11850 | } |
| 11851 | |
| 11852 | // Emit relocations for a section. |
| 11853 | // This is a modified version of the function by the same name in |
| 11854 | // target-reloc.h. Using relocate_special_relocatable for |
| 11855 | // R_PPC_PLTREL24 would require duplication of the entire body of the |
| 11856 | // loop, so we may as well duplicate the whole thing. |
| 11857 | |
| 11858 | template<int size, bool big_endian> |
| 11859 | void |
| 11860 | Target_powerpc<size, big_endian>::relocate_relocs( |
| 11861 | const Relocate_info<size, big_endian>* relinfo, |
| 11862 | unsigned int sh_type, |
| 11863 | const unsigned char* prelocs, |
| 11864 | size_t reloc_count, |
| 11865 | Output_section* output_section, |
| 11866 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
| 11867 | unsigned char*, |
| 11868 | Address view_address, |
| 11869 | section_size_type, |
| 11870 | unsigned char* reloc_view, |
| 11871 | section_size_type reloc_view_size) |
| 11872 | { |
| 11873 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 11874 | |
| 11875 | typedef typename elfcpp::Rela<size, big_endian> Reltype; |
| 11876 | typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write; |
| 11877 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 11878 | // Offset from start of insn to d-field reloc. |
| 11879 | const int d_offset = big_endian ? 2 : 0; |
| 11880 | |
| 11881 | Powerpc_relobj<size, big_endian>* const object |
| 11882 | = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object); |
| 11883 | const unsigned int local_count = object->local_symbol_count(); |
| 11884 | unsigned int got2_shndx = object->got2_shndx(); |
| 11885 | Address got2_addend = 0; |
| 11886 | if (got2_shndx != 0) |
| 11887 | { |
| 11888 | got2_addend = object->get_output_section_offset(got2_shndx); |
| 11889 | gold_assert(got2_addend != invalid_address); |
| 11890 | } |
| 11891 | |
| 11892 | const bool relocatable = parameters->options().relocatable(); |
| 11893 | |
| 11894 | unsigned char* pwrite = reloc_view; |
| 11895 | bool zap_next = false; |
| 11896 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
| 11897 | { |
| 11898 | Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i); |
| 11899 | if (strategy == Relocatable_relocs::RELOC_DISCARD) |
| 11900 | continue; |
| 11901 | |
| 11902 | Reltype reloc(prelocs); |
| 11903 | Reltype_write reloc_write(pwrite); |
| 11904 | |
| 11905 | Address offset = reloc.get_r_offset(); |
| 11906 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
| 11907 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 11908 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); |
| 11909 | const unsigned int orig_r_sym = r_sym; |
| 11910 | typename elfcpp::Elf_types<size>::Elf_Swxword addend |
| 11911 | = reloc.get_r_addend(); |
| 11912 | const Symbol* gsym = NULL; |
| 11913 | |
| 11914 | if (zap_next) |
| 11915 | { |
| 11916 | // We could arrange to discard these and other relocs for |
| 11917 | // tls optimised sequences in the strategy methods, but for |
| 11918 | // now do as BFD ld does. |
| 11919 | r_type = elfcpp::R_POWERPC_NONE; |
| 11920 | zap_next = false; |
| 11921 | } |
| 11922 | |
| 11923 | // Get the new symbol index. |
| 11924 | Output_section* os = NULL; |
| 11925 | if (r_sym < local_count) |
| 11926 | { |
| 11927 | switch (strategy) |
| 11928 | { |
| 11929 | case Relocatable_relocs::RELOC_COPY: |
| 11930 | case Relocatable_relocs::RELOC_SPECIAL: |
| 11931 | if (r_sym != 0) |
| 11932 | { |
| 11933 | r_sym = object->symtab_index(r_sym); |
| 11934 | gold_assert(r_sym != -1U); |
| 11935 | } |
| 11936 | break; |
| 11937 | |
| 11938 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: |
| 11939 | { |
| 11940 | // We are adjusting a section symbol. We need to find |
| 11941 | // the symbol table index of the section symbol for |
| 11942 | // the output section corresponding to input section |
| 11943 | // in which this symbol is defined. |
| 11944 | gold_assert(r_sym < local_count); |
| 11945 | bool is_ordinary; |
| 11946 | unsigned int shndx = |
| 11947 | object->local_symbol_input_shndx(r_sym, &is_ordinary); |
| 11948 | gold_assert(is_ordinary); |
| 11949 | os = object->output_section(shndx); |
| 11950 | gold_assert(os != NULL); |
| 11951 | gold_assert(os->needs_symtab_index()); |
| 11952 | r_sym = os->symtab_index(); |
| 11953 | } |
| 11954 | break; |
| 11955 | |
| 11956 | default: |
| 11957 | gold_unreachable(); |
| 11958 | } |
| 11959 | } |
| 11960 | else |
| 11961 | { |
| 11962 | gsym = object->global_symbol(r_sym); |
| 11963 | gold_assert(gsym != NULL); |
| 11964 | if (gsym->is_forwarder()) |
| 11965 | gsym = relinfo->symtab->resolve_forwards(gsym); |
| 11966 | |
| 11967 | gold_assert(gsym->has_symtab_index()); |
| 11968 | r_sym = gsym->symtab_index(); |
| 11969 | } |
| 11970 | |
| 11971 | // Get the new offset--the location in the output section where |
| 11972 | // this relocation should be applied. |
| 11973 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
| 11974 | offset += offset_in_output_section; |
| 11975 | else |
| 11976 | { |
| 11977 | section_offset_type sot_offset = |
| 11978 | convert_types<section_offset_type, Address>(offset); |
| 11979 | section_offset_type new_sot_offset = |
| 11980 | output_section->output_offset(object, relinfo->data_shndx, |
| 11981 | sot_offset); |
| 11982 | gold_assert(new_sot_offset != -1); |
| 11983 | offset = new_sot_offset; |
| 11984 | } |
| 11985 | |
| 11986 | // In an object file, r_offset is an offset within the section. |
| 11987 | // In an executable or dynamic object, generated by |
| 11988 | // --emit-relocs, r_offset is an absolute address. |
| 11989 | if (!relocatable) |
| 11990 | { |
| 11991 | offset += view_address; |
| 11992 | if (static_cast<Address>(offset_in_output_section) != invalid_address) |
| 11993 | offset -= offset_in_output_section; |
| 11994 | } |
| 11995 | |
| 11996 | // Handle the reloc addend based on the strategy. |
| 11997 | if (strategy == Relocatable_relocs::RELOC_COPY) |
| 11998 | ; |
| 11999 | else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA) |
| 12000 | { |
| 12001 | const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym); |
| 12002 | addend = psymval->value(object, addend); |
| 12003 | // In a relocatable link, the symbol value is relative to |
| 12004 | // the start of the output section. For a non-relocatable |
| 12005 | // link, we need to adjust the addend. |
| 12006 | if (!relocatable) |
| 12007 | { |
| 12008 | gold_assert(os != NULL); |
| 12009 | addend -= os->address(); |
| 12010 | } |
| 12011 | } |
| 12012 | else if (strategy == Relocatable_relocs::RELOC_SPECIAL) |
| 12013 | { |
| 12014 | if (size == 32) |
| 12015 | { |
| 12016 | if (addend >= 32768) |
| 12017 | addend += got2_addend; |
| 12018 | } |
| 12019 | else if (r_type == elfcpp::R_POWERPC_REL16_HA) |
| 12020 | { |
| 12021 | r_type = elfcpp::R_POWERPC_ADDR16_HA; |
| 12022 | addend -= d_offset; |
| 12023 | } |
| 12024 | else if (r_type == elfcpp::R_POWERPC_REL16_LO) |
| 12025 | { |
| 12026 | r_type = elfcpp::R_POWERPC_ADDR16_LO; |
| 12027 | addend -= d_offset + 4; |
| 12028 | } |
| 12029 | } |
| 12030 | else |
| 12031 | gold_unreachable(); |
| 12032 | |
| 12033 | if (!relocatable) |
| 12034 | { |
| 12035 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
| 12036 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO |
| 12037 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI |
| 12038 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA) |
| 12039 | { |
| 12040 | // First instruction of a global dynamic sequence, |
| 12041 | // arg setup insn. |
| 12042 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
| 12043 | switch (this->optimize_tls_gd(final)) |
| 12044 | { |
| 12045 | case tls::TLSOPT_TO_IE: |
| 12046 | r_type += (elfcpp::R_POWERPC_GOT_TPREL16 |
| 12047 | - elfcpp::R_POWERPC_GOT_TLSGD16); |
| 12048 | break; |
| 12049 | case tls::TLSOPT_TO_LE: |
| 12050 | if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16 |
| 12051 | || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO) |
| 12052 | r_type = elfcpp::R_POWERPC_TPREL16_HA; |
| 12053 | else |
| 12054 | { |
| 12055 | r_type = elfcpp::R_POWERPC_NONE; |
| 12056 | offset -= d_offset; |
| 12057 | } |
| 12058 | break; |
| 12059 | default: |
| 12060 | break; |
| 12061 | } |
| 12062 | } |
| 12063 | else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 |
| 12064 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO |
| 12065 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI |
| 12066 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA) |
| 12067 | { |
| 12068 | // First instruction of a local dynamic sequence, |
| 12069 | // arg setup insn. |
| 12070 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) |
| 12071 | { |
| 12072 | if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16 |
| 12073 | || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO) |
| 12074 | { |
| 12075 | r_type = elfcpp::R_POWERPC_TPREL16_HA; |
| 12076 | const Output_section* os = relinfo->layout->tls_segment() |
| 12077 | ->first_section(); |
| 12078 | gold_assert(os != NULL); |
| 12079 | gold_assert(os->needs_symtab_index()); |
| 12080 | r_sym = os->symtab_index(); |
| 12081 | addend = dtp_offset; |
| 12082 | } |
| 12083 | else |
| 12084 | { |
| 12085 | r_type = elfcpp::R_POWERPC_NONE; |
| 12086 | offset -= d_offset; |
| 12087 | } |
| 12088 | } |
| 12089 | } |
| 12090 | else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 |
| 12091 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO |
| 12092 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI |
| 12093 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA) |
| 12094 | { |
| 12095 | // First instruction of initial exec sequence. |
| 12096 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
| 12097 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) |
| 12098 | { |
| 12099 | if (r_type == elfcpp::R_POWERPC_GOT_TPREL16 |
| 12100 | || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO) |
| 12101 | r_type = elfcpp::R_POWERPC_TPREL16_HA; |
| 12102 | else |
| 12103 | { |
| 12104 | r_type = elfcpp::R_POWERPC_NONE; |
| 12105 | offset -= d_offset; |
| 12106 | } |
| 12107 | } |
| 12108 | } |
| 12109 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD) |
| 12110 | || (size == 32 && r_type == elfcpp::R_PPC_TLSGD)) |
| 12111 | { |
| 12112 | // Second instruction of a global dynamic sequence, |
| 12113 | // the __tls_get_addr call |
| 12114 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
| 12115 | switch (this->optimize_tls_gd(final)) |
| 12116 | { |
| 12117 | case tls::TLSOPT_TO_IE: |
| 12118 | r_type = elfcpp::R_POWERPC_NONE; |
| 12119 | zap_next = true; |
| 12120 | break; |
| 12121 | case tls::TLSOPT_TO_LE: |
| 12122 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
| 12123 | offset += d_offset; |
| 12124 | zap_next = true; |
| 12125 | break; |
| 12126 | default: |
| 12127 | break; |
| 12128 | } |
| 12129 | } |
| 12130 | else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD) |
| 12131 | || (size == 32 && r_type == elfcpp::R_PPC_TLSLD)) |
| 12132 | { |
| 12133 | // Second instruction of a local dynamic sequence, |
| 12134 | // the __tls_get_addr call |
| 12135 | if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE) |
| 12136 | { |
| 12137 | const Output_section* os = relinfo->layout->tls_segment() |
| 12138 | ->first_section(); |
| 12139 | gold_assert(os != NULL); |
| 12140 | gold_assert(os->needs_symtab_index()); |
| 12141 | r_sym = os->symtab_index(); |
| 12142 | addend = dtp_offset; |
| 12143 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
| 12144 | offset += d_offset; |
| 12145 | zap_next = true; |
| 12146 | } |
| 12147 | } |
| 12148 | else if (r_type == elfcpp::R_POWERPC_TLS) |
| 12149 | { |
| 12150 | // Second instruction of an initial exec sequence |
| 12151 | const bool final = gsym == NULL || gsym->final_value_is_known(); |
| 12152 | if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE) |
| 12153 | { |
| 12154 | r_type = elfcpp::R_POWERPC_TPREL16_LO; |
| 12155 | offset += d_offset; |
| 12156 | } |
| 12157 | } |
| 12158 | } |
| 12159 | |
| 12160 | reloc_write.put_r_offset(offset); |
| 12161 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type)); |
| 12162 | reloc_write.put_r_addend(addend); |
| 12163 | |
| 12164 | pwrite += reloc_size; |
| 12165 | } |
| 12166 | |
| 12167 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) |
| 12168 | == reloc_view_size); |
| 12169 | } |
| 12170 | |
| 12171 | // Return the value to use for a dynamic symbol which requires special |
| 12172 | // treatment. This is how we support equality comparisons of function |
| 12173 | // pointers across shared library boundaries, as described in the |
| 12174 | // processor specific ABI supplement. |
| 12175 | |
| 12176 | template<int size, bool big_endian> |
| 12177 | uint64_t |
| 12178 | Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const |
| 12179 | { |
| 12180 | if (size == 32) |
| 12181 | { |
| 12182 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); |
| 12183 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
| 12184 | p != this->stub_tables_.end(); |
| 12185 | ++p) |
| 12186 | { |
| 12187 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
| 12188 | = (*p)->find_plt_call_entry(gsym); |
| 12189 | if (ent != NULL) |
| 12190 | return (*p)->stub_address() + ent->off_; |
| 12191 | } |
| 12192 | } |
| 12193 | else if (this->abiversion() >= 2) |
| 12194 | { |
| 12195 | Address off = this->glink_section()->find_global_entry(gsym); |
| 12196 | if (off != invalid_address) |
| 12197 | return this->glink_section()->global_entry_address() + off; |
| 12198 | } |
| 12199 | gold_unreachable(); |
| 12200 | } |
| 12201 | |
| 12202 | // Return the PLT address to use for a local symbol. |
| 12203 | template<int size, bool big_endian> |
| 12204 | uint64_t |
| 12205 | Target_powerpc<size, big_endian>::do_plt_address_for_local( |
| 12206 | const Relobj* object, |
| 12207 | unsigned int symndx) const |
| 12208 | { |
| 12209 | if (size == 32) |
| 12210 | { |
| 12211 | const Sized_relobj<size, big_endian>* relobj |
| 12212 | = static_cast<const Sized_relobj<size, big_endian>*>(object); |
| 12213 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
| 12214 | p != this->stub_tables_.end(); |
| 12215 | ++p) |
| 12216 | { |
| 12217 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
| 12218 | = (*p)->find_plt_call_entry(relobj->sized_relobj(), symndx); |
| 12219 | if (ent != NULL) |
| 12220 | return (*p)->stub_address() + ent->off_; |
| 12221 | } |
| 12222 | } |
| 12223 | gold_unreachable(); |
| 12224 | } |
| 12225 | |
| 12226 | // Return the PLT address to use for a global symbol. |
| 12227 | template<int size, bool big_endian> |
| 12228 | uint64_t |
| 12229 | Target_powerpc<size, big_endian>::do_plt_address_for_global( |
| 12230 | const Symbol* gsym) const |
| 12231 | { |
| 12232 | if (size == 32) |
| 12233 | { |
| 12234 | for (typename Stub_tables::const_iterator p = this->stub_tables_.begin(); |
| 12235 | p != this->stub_tables_.end(); |
| 12236 | ++p) |
| 12237 | { |
| 12238 | const typename Stub_table<size, big_endian>::Plt_stub_ent* ent |
| 12239 | = (*p)->find_plt_call_entry(gsym); |
| 12240 | if (ent != NULL) |
| 12241 | return (*p)->stub_address() + ent->off_; |
| 12242 | } |
| 12243 | } |
| 12244 | else if (this->abiversion() >= 2) |
| 12245 | { |
| 12246 | Address off = this->glink_section()->find_global_entry(gsym); |
| 12247 | if (off != invalid_address) |
| 12248 | return this->glink_section()->global_entry_address() + off; |
| 12249 | } |
| 12250 | gold_unreachable(); |
| 12251 | } |
| 12252 | |
| 12253 | // Return the offset to use for the GOT_INDX'th got entry which is |
| 12254 | // for a local tls symbol specified by OBJECT, SYMNDX. |
| 12255 | template<int size, bool big_endian> |
| 12256 | int64_t |
| 12257 | Target_powerpc<size, big_endian>::do_tls_offset_for_local( |
| 12258 | const Relobj* object, |
| 12259 | unsigned int symndx, |
| 12260 | unsigned int got_indx) const |
| 12261 | { |
| 12262 | const Powerpc_relobj<size, big_endian>* ppc_object |
| 12263 | = static_cast<const Powerpc_relobj<size, big_endian>*>(object); |
| 12264 | if (ppc_object->local_symbol(symndx)->is_tls_symbol()) |
| 12265 | { |
| 12266 | for (Got_type got_type = GOT_TYPE_TLSGD; |
| 12267 | got_type <= GOT_TYPE_TPREL; |
| 12268 | got_type = Got_type(got_type + 1)) |
| 12269 | if (ppc_object->local_has_got_offset(symndx, got_type)) |
| 12270 | { |
| 12271 | unsigned int off = ppc_object->local_got_offset(symndx, got_type); |
| 12272 | if (got_type == GOT_TYPE_TLSGD) |
| 12273 | off += size / 8; |
| 12274 | if (off == got_indx * (size / 8)) |
| 12275 | { |
| 12276 | if (got_type == GOT_TYPE_TPREL) |
| 12277 | return -tp_offset; |
| 12278 | else |
| 12279 | return -dtp_offset; |
| 12280 | } |
| 12281 | } |
| 12282 | } |
| 12283 | gold_unreachable(); |
| 12284 | } |
| 12285 | |
| 12286 | // Return the offset to use for the GOT_INDX'th got entry which is |
| 12287 | // for global tls symbol GSYM. |
| 12288 | template<int size, bool big_endian> |
| 12289 | int64_t |
| 12290 | Target_powerpc<size, big_endian>::do_tls_offset_for_global( |
| 12291 | Symbol* gsym, |
| 12292 | unsigned int got_indx) const |
| 12293 | { |
| 12294 | if (gsym->type() == elfcpp::STT_TLS) |
| 12295 | { |
| 12296 | for (Got_type got_type = GOT_TYPE_TLSGD; |
| 12297 | got_type <= GOT_TYPE_TPREL; |
| 12298 | got_type = Got_type(got_type + 1)) |
| 12299 | if (gsym->has_got_offset(got_type)) |
| 12300 | { |
| 12301 | unsigned int off = gsym->got_offset(got_type); |
| 12302 | if (got_type == GOT_TYPE_TLSGD) |
| 12303 | off += size / 8; |
| 12304 | if (off == got_indx * (size / 8)) |
| 12305 | { |
| 12306 | if (got_type == GOT_TYPE_TPREL) |
| 12307 | return -tp_offset; |
| 12308 | else |
| 12309 | return -dtp_offset; |
| 12310 | } |
| 12311 | } |
| 12312 | } |
| 12313 | gold_unreachable(); |
| 12314 | } |
| 12315 | |
| 12316 | // The selector for powerpc object files. |
| 12317 | |
| 12318 | template<int size, bool big_endian> |
| 12319 | class Target_selector_powerpc : public Target_selector |
| 12320 | { |
| 12321 | public: |
| 12322 | Target_selector_powerpc() |
| 12323 | : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC, |
| 12324 | size, big_endian, |
| 12325 | (size == 64 |
| 12326 | ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle") |
| 12327 | : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")), |
| 12328 | (size == 64 |
| 12329 | ? (big_endian ? "elf64ppc" : "elf64lppc") |
| 12330 | : (big_endian ? "elf32ppc" : "elf32lppc"))) |
| 12331 | { } |
| 12332 | |
| 12333 | virtual Target* |
| 12334 | do_instantiate_target() |
| 12335 | { return new Target_powerpc<size, big_endian>(); } |
| 12336 | }; |
| 12337 | |
| 12338 | Target_selector_powerpc<32, true> target_selector_ppc32; |
| 12339 | Target_selector_powerpc<32, false> target_selector_ppc32le; |
| 12340 | Target_selector_powerpc<64, true> target_selector_ppc64; |
| 12341 | Target_selector_powerpc<64, false> target_selector_ppc64le; |
| 12342 | |
| 12343 | // Instantiate these constants for -O0 |
| 12344 | template<int size, bool big_endian> |
| 12345 | const typename Output_data_glink<size, big_endian>::Address |
| 12346 | Output_data_glink<size, big_endian>::invalid_address; |
| 12347 | template<int size, bool big_endian> |
| 12348 | const typename Stub_table<size, big_endian>::Address |
| 12349 | Stub_table<size, big_endian>::invalid_address; |
| 12350 | template<int size, bool big_endian> |
| 12351 | const typename Target_powerpc<size, big_endian>::Address |
| 12352 | Target_powerpc<size, big_endian>::invalid_address; |
| 12353 | |
| 12354 | } // End anonymous namespace. |