gold/target-reloc.h

   1 // target-reloc.h -- target specific relocation support  -*- C++ -*-
   2
   3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 #ifndef GOLD_TARGET_RELOC_H
  24 #define GOLD_TARGET_RELOC_H
  25
  26 #include "elfcpp.h"
  27 #include "symtab.h"
  28 #include "object.h"
  29 #include "reloc.h"
  30 #include "reloc-types.h"
  31
  32 namespace gold
  33 {
  34
  35 // This function implements the generic part of reloc scanning.  The
  36 // template parameter Scan must be a class type which provides two
  37 // functions: local() and global().  Those functions implement the
  38 // machine specific part of scanning.  We do it this way to
  39 // avoidmaking a function call for each relocation, and to avoid
  40 // repeating the generic code for each target.
  41
  42 template<int size, bool big_endian, typename Target_type, int sh_type,
  43          typename Scan>
  44 inline void
  45 scan_relocs(
  46     const General_options& options,
  47     Symbol_table* symtab,
  48     Layout* layout,
  49     Target_type* target,
  50     Sized_relobj<size, big_endian>* object,
  51     unsigned int data_shndx,
  52     const unsigned char* prelocs,
  53     size_t reloc_count,
  54     Output_section* output_section,
  55     bool needs_special_offset_handling,
  56     size_t local_count,
  57     const unsigned char* plocal_syms)
  58 {
  59   typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype;
  60   const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size;
  61   const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
  62   Scan scan;
  63
  64   for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
  65     {
  66       Reltype reloc(prelocs);
  67
  68       if (needs_special_offset_handling
  69           && !output_section->is_input_address_mapped(object, data_shndx,
  70                                                       reloc.get_r_offset()))
  71         continue;
  72
  73       typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
  74       unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
  75       unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
  76
  77       if (r_sym < local_count)
  78         {
  79           gold_assert(plocal_syms != NULL);
  80           typename elfcpp::Sym<size, big_endian> lsym(plocal_syms
  81                                                       + r_sym * sym_size);
  82           unsigned int shndx = lsym.get_st_shndx();
  83           bool is_ordinary;
  84           shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
  85           if (is_ordinary
  86               && shndx != elfcpp::SHN_UNDEF
  87               && !object->is_section_included(shndx))
  88             {
  89               // RELOC is a relocation against a local symbol in a
  90               // section we are discarding.  We can ignore this
  91               // relocation.  It will eventually become a reloc
  92               // against the value zero.
  93               //
  94               // FIXME: We should issue a warning if this is an
  95               // allocated section; is this the best place to do it?
  96               //
  97               // FIXME: The old GNU linker would in some cases look
  98               // for the linkonce section which caused this section to
  99               // be discarded, and, if the other section was the same
 100               // size, change the reloc to refer to the other section.
 101               // That seems risky and weird to me, and I don't know of
 102               // any case where it is actually required.
 103
 104               continue;
 105             }
 106
 107           scan.local(options, symtab, layout, target, object, data_shndx,
 108                      output_section, reloc, r_type, lsym);
 109         }
 110       else
 111         {
 112           Symbol* gsym = object->global_symbol(r_sym);
 113           gold_assert(gsym != NULL);
 114           if (gsym->is_forwarder())
 115             gsym = symtab->resolve_forwards(gsym);
 116
 117           scan.global(options, symtab, layout, target, object, data_shndx,
 118                       output_section, reloc, r_type, gsym);
 119         }
 120     }
 121 }
 122
 123 // Behavior for relocations to discarded comdat sections.
 124
 125 enum Comdat_behavior
 126 {
 127   CB_UNDETERMINED,   // Not yet determined -- need to look at section name.
 128   CB_PRETEND,        // Attempt to map to the corresponding kept section.
 129   CB_IGNORE,         // Ignore the relocation.
 130   CB_WARNING         // Print a warning.
 131 };
 132
 133 // Decide what the linker should do for relocations that refer to discarded
 134 // comdat sections.  This decision is based on the name of the section being
 135 // relocated.
 136
 137 inline Comdat_behavior
 138 get_comdat_behavior(const char* name)
 139 {
 140   if (Layout::is_debug_info_section(name))
 141     return CB_PRETEND;
 142   if (strcmp(name, ".eh_frame") == 0
 143       || strcmp(name, ".gcc_except_table") == 0)
 144     return CB_IGNORE;
 145   return CB_WARNING;
 146 }
 147
 148 // This function implements the generic part of relocation processing.
 149 // The template parameter Relocate must be a class type which provides
 150 // a single function, relocate(), which implements the machine
 151 // specific part of a relocation.
 152
 153 // SIZE is the ELF size: 32 or 64.  BIG_ENDIAN is the endianness of
 154 // the data.  SH_TYPE is the section type: SHT_REL or SHT_RELA.
 155 // RELOCATE implements operator() to do a relocation.
 156
 157 // PRELOCS points to the relocation data.  RELOC_COUNT is the number
 158 // of relocs.  OUTPUT_SECTION is the output section.
 159 // NEEDS_SPECIAL_OFFSET_HANDLING is true if input offsets need to be
 160 // mapped to output offsets.
 161
 162 // VIEW is the section data, VIEW_ADDRESS is its memory address, and
 163 // VIEW_SIZE is the size.  These refer to the input section, unless
 164 // NEEDS_SPECIAL_OFFSET_HANDLING is true, in which case they refer to
 165 // the output section.
 166
 167 // RELOC_SYMBOL_CHANGES is used for -fsplit-stack support.  If it is
 168 // not NULL, it is a vector indexed by relocation index.  If that
 169 // entry is not NULL, it points to a global symbol which used as the
 170 // symbol for the relocation, ignoring the symbol index in the
 171 // relocation.
 172
 173 template<int size, bool big_endian, typename Target_type, int sh_type,
 174          typename Relocate>
 175 inline void
 176 relocate_section(
 177     const Relocate_info<size, big_endian>* relinfo,
 178     Target_type* target,
 179     const unsigned char* prelocs,
 180     size_t reloc_count,
 181     Output_section* output_section,
 182     bool needs_special_offset_handling,
 183     unsigned char* view,
 184     typename elfcpp::Elf_types<size>::Elf_Addr view_address,
 185     section_size_type view_size,
 186     const Reloc_symbol_changes* reloc_symbol_changes)
 187 {
 188   typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype;
 189   const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size;
 190   Relocate relocate;
 191
 192   Sized_relobj<size, big_endian>* object = relinfo->object;
 193   unsigned int local_count = object->local_symbol_count();
 194
 195   Comdat_behavior comdat_behavior = CB_UNDETERMINED;
 196
 197   for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
 198     {
 199       Reltype reloc(prelocs);
 200
 201       section_offset_type offset =
 202         convert_to_section_size_type(reloc.get_r_offset());
 203
 204       if (needs_special_offset_handling)
 205         {
 206           offset = output_section->output_offset(relinfo->object,
 207                                                  relinfo->data_shndx,
 208                                                  offset);
 209           if (offset == -1)
 210             continue;
 211         }
 212
 213       typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
 214       unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
 215       unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
 216
 217       const Sized_symbol<size>* sym;
 218
 219       Symbol_value<size> symval;
 220       const Symbol_value<size> *psymval;
 221       if (r_sym < local_count
 222           && (reloc_symbol_changes == NULL
 223               || (*reloc_symbol_changes)[i] == NULL))
 224         {
 225           sym = NULL;
 226           psymval = object->local_symbol(r_sym);
 227
 228           // If the local symbol belongs to a section we are discarding,
 229           // and that section is a debug section, try to find the
 230           // corresponding kept section and map this symbol to its
 231           // counterpart in the kept section.  The symbol must not
 232           // correspond to a section we are folding.
 233           bool is_ordinary;
 234           unsigned int shndx = psymval->input_shndx(&is_ordinary);
 235           if (is_ordinary
 236               && shndx != elfcpp::SHN_UNDEF
 237               && !object->is_section_included(shndx)
 238               && !(relinfo->symtab->is_section_folded(object, shndx)))
 239             {
 240               if (comdat_behavior == CB_UNDETERMINED)
 241                 {
 242                   std::string name = object->section_name(relinfo->data_shndx);
 243                   comdat_behavior = get_comdat_behavior(name.c_str());
 244                 }
 245               if (comdat_behavior == CB_PRETEND)
 246                 {
 247                   bool found;
 248                   typename elfcpp::Elf_types<size>::Elf_Addr value =
 249                     object->map_to_kept_section(shndx, &found);
 250                   if (found)
 251                     symval.set_output_value(value + psymval->input_value());
 252                   else
 253                     symval.set_output_value(0);
 254                 }
 255               else
 256                 {
 257                   if (comdat_behavior == CB_WARNING)
 258                     gold_warning_at_location(relinfo, i, offset,
 259                                              _("relocation refers to discarded "
 260                                                "comdat section"));
 261                   symval.set_output_value(0);
 262                 }
 263               symval.set_no_output_symtab_entry();
 264               psymval = &symval;
 265             }
 266         }
 267       else
 268         {
 269           const Symbol* gsym;
 270           if (reloc_symbol_changes != NULL
 271               && (*reloc_symbol_changes)[i] != NULL)
 272             gsym = (*reloc_symbol_changes)[i];
 273           else
 274             {
 275               gsym = object->global_symbol(r_sym);
 276               gold_assert(gsym != NULL);
 277               if (gsym->is_forwarder())
 278                 gsym = relinfo->symtab->resolve_forwards(gsym);
 279             }
 280
 281           sym = static_cast<const Sized_symbol<size>*>(gsym);
 282           if (sym->has_symtab_index())
 283             symval.set_output_symtab_index(sym->symtab_index());
 284           else
 285             symval.set_no_output_symtab_entry();
 286           symval.set_output_value(sym->value());
 287           psymval = &symval;
 288         }
 289
 290       if (!relocate.relocate(relinfo, target, output_section, i, reloc,
 291                              r_type, sym, psymval, view + offset,
 292                              view_address + offset, view_size))
 293         continue;
 294
 295       if (offset < 0 || static_cast<section_size_type>(offset) >= view_size)
 296         {
 297           gold_error_at_location(relinfo, i, offset,
 298                                  _("reloc has bad offset %zu"),
 299                                  static_cast<size_t>(offset));
 300           continue;
 301         }
 302
 303       if (sym != NULL
 304           && sym->is_undefined()
 305           && sym->binding() != elfcpp::STB_WEAK
 306           && !target->is_defined_by_abi(sym)
 307           && (!parameters->options().shared()       // -shared
 308               || parameters->options().defs()))     // -z defs
 309         gold_undefined_symbol_at_location(sym, relinfo, i, offset);
 310
 311       if (sym != NULL && sym->has_warning())
 312         relinfo->symtab->issue_warning(sym, relinfo, i, offset);
 313     }
 314 }
 315
 316 // This class may be used as a typical class for the
 317 // Scan_relocatable_reloc parameter to scan_relocatable_relocs.  The
 318 // template parameter Classify_reloc must be a class type which
 319 // provides a function get_size_for_reloc which returns the number of
 320 // bytes to which a reloc applies.  This class is intended to capture
 321 // the most typical target behaviour, while still permitting targets
 322 // to define their own independent class for Scan_relocatable_reloc.
 323
 324 template<int sh_type, typename Classify_reloc>
 325 class Default_scan_relocatable_relocs
 326 {
 327  public:
 328   // Return the strategy to use for a local symbol which is not a
 329   // section symbol, given the relocation type.
 330   inline Relocatable_relocs::Reloc_strategy
 331   local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
 332   {
 333     // We assume that relocation type 0 is NONE.  Targets which are
 334     // different must override.
 335     if (r_type == 0 && r_sym == 0)
 336       return Relocatable_relocs::RELOC_DISCARD;
 337     return Relocatable_relocs::RELOC_COPY;
 338   }
 339
 340   // Return the strategy to use for a local symbol which is a section
 341   // symbol, given the relocation type.
 342   inline Relocatable_relocs::Reloc_strategy
 343   local_section_strategy(unsigned int r_type, Relobj* object)
 344   {
 345     if (sh_type == elfcpp::SHT_RELA)
 346       return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
 347     else
 348       {
 349         Classify_reloc classify;
 350         switch (classify.get_size_for_reloc(r_type, object))
 351           {
 352           case 0:
 353             return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0;
 354           case 1:
 355             return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_1;
 356           case 2:
 357             return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_2;
 358           case 4:
 359             return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_4;
 360           case 8:
 361             return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_8;
 362           default:
 363             gold_unreachable();
 364           }
 365       }
 366   }
 367
 368   // Return the strategy to use for a global symbol, given the
 369   // relocation type, the object, and the symbol index.
 370   inline Relocatable_relocs::Reloc_strategy
 371   global_strategy(unsigned int, Relobj*, unsigned int)
 372   { return Relocatable_relocs::RELOC_COPY; }
 373 };
 374
 375 // Scan relocs during a relocatable link.  This is a default
 376 // definition which should work for most targets.
 377 // Scan_relocatable_reloc must name a class type which provides three
 378 // functions which return a Relocatable_relocs::Reloc_strategy code:
 379 // global_strategy, local_non_section_strategy, and
 380 // local_section_strategy.  Most targets should be able to use
 381 // Default_scan_relocatable_relocs as this class.
 382
 383 template<int size, bool big_endian, int sh_type,
 384          typename Scan_relocatable_reloc>
 385 void
 386 scan_relocatable_relocs(
 387     const General_options&,
 388     Symbol_table*,
 389     Layout*,
 390     Sized_relobj<size, big_endian>* object,
 391     unsigned int data_shndx,
 392     const unsigned char* prelocs,
 393     size_t reloc_count,
 394     Output_section* output_section,
 395     bool needs_special_offset_handling,
 396     size_t local_symbol_count,
 397     const unsigned char* plocal_syms,
 398     Relocatable_relocs* rr)
 399 {
 400   typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype;
 401   const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size;
 402   const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
 403   Scan_relocatable_reloc scan;
 404
 405   for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
 406     {
 407       Reltype reloc(prelocs);
 408
 409       Relocatable_relocs::Reloc_strategy strategy;
 410
 411       if (needs_special_offset_handling
 412           && !output_section->is_input_address_mapped(object, data_shndx,
 413                                                       reloc.get_r_offset()))
 414         strategy = Relocatable_relocs::RELOC_DISCARD;
 415       else
 416         {
 417           typename elfcpp::Elf_types<size>::Elf_WXword r_info =
 418             reloc.get_r_info();
 419           const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
 420           const unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
 421
 422           if (r_sym >= local_symbol_count)
 423             strategy = scan.global_strategy(r_type, object, r_sym);
 424           else
 425             {
 426               gold_assert(plocal_syms != NULL);
 427               typename elfcpp::Sym<size, big_endian> lsym(plocal_syms
 428                                                           + r_sym * sym_size);
 429               unsigned int shndx = lsym.get_st_shndx();
 430               bool is_ordinary;
 431               shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
 432               if (is_ordinary
 433                   && shndx != elfcpp::SHN_UNDEF
 434                   && !object->is_section_included(shndx))
 435                 {
 436                   // RELOC is a relocation against a local symbol
 437                   // defined in a section we are discarding.  Discard
 438                   // the reloc.  FIXME: Should we issue a warning?
 439                   strategy = Relocatable_relocs::RELOC_DISCARD;
 440                 }
 441               else if (lsym.get_st_type() != elfcpp::STT_SECTION)
 442                 strategy = scan.local_non_section_strategy(r_type, object,
 443                                                            r_sym);
 444               else
 445                 {
 446                   strategy = scan.local_section_strategy(r_type, object);
 447                   if (strategy != Relocatable_relocs::RELOC_DISCARD)
 448                     object->output_section(shndx)->set_needs_symtab_index();
 449                 }
 450             }
 451         }
 452
 453       rr->set_next_reloc_strategy(strategy);
 454     }
 455 }
 456
 457 // Relocate relocs during a relocatable link.  This is a default
 458 // definition which should work for most targets.
 459
 460 template<int size, bool big_endian, int sh_type>
 461 void
 462 relocate_for_relocatable(
 463     const Relocate_info<size, big_endian>* relinfo,
 464     const unsigned char* prelocs,
 465     size_t reloc_count,
 466     Output_section* output_section,
 467     typename elfcpp::Elf_types<size>::Elf_Addr offset_in_output_section,
 468     const Relocatable_relocs* rr,
 469     unsigned char* view,
 470     typename elfcpp::Elf_types<size>::Elf_Addr view_address,
 471     section_size_type,
 472     unsigned char* reloc_view,
 473     section_size_type reloc_view_size)
 474 {
 475   typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
 476   typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype;
 477   typedef typename Reloc_types<sh_type, size, big_endian>::Reloc_write
 478     Reltype_write;
 479   const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size;
 480   const Address invalid_address = static_cast<Address>(0) - 1;
 481
 482   Sized_relobj<size, big_endian>* const object = relinfo->object;
 483   const unsigned int local_count = object->local_symbol_count();
 484
 485   unsigned char* pwrite = reloc_view;
 486
 487   for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
 488     {
 489       Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
 490       if (strategy == Relocatable_relocs::RELOC_DISCARD)
 491         continue;
 492
 493       Reltype reloc(prelocs);
 494       Reltype_write reloc_write(pwrite);
 495
 496       typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
 497       const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
 498       const unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
 499
 500       // Get the new symbol index.
 501
 502       unsigned int new_symndx;
 503       if (r_sym < local_count)
 504         {
 505           switch (strategy)
 506             {
 507             case Relocatable_relocs::RELOC_COPY:
 508               new_symndx = object->symtab_index(r_sym);
 509               gold_assert(new_symndx != -1U);
 510               break;
 511
 512             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
 513             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0:
 514             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_1:
 515             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_2:
 516             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_4:
 517             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_8:
 518               {
 519                 // We are adjusting a section symbol.  We need to find
 520                 // the symbol table index of the section symbol for
 521                 // the output section corresponding to input section
 522                 // in which this symbol is defined.
 523                 gold_assert(r_sym < local_count);
 524                 bool is_ordinary;
 525                 unsigned int shndx =
 526                   object->local_symbol_input_shndx(r_sym, &is_ordinary);
 527                 gold_assert(is_ordinary);
 528                 Output_section* os = object->output_section(shndx);
 529                 gold_assert(os != NULL);
 530                 gold_assert(os->needs_symtab_index());
 531                 new_symndx = os->symtab_index();
 532               }
 533               break;
 534
 535             default:
 536               gold_unreachable();
 537             }
 538         }
 539       else
 540         {
 541           const Symbol* gsym = object->global_symbol(r_sym);
 542           gold_assert(gsym != NULL);
 543           if (gsym->is_forwarder())
 544             gsym = relinfo->symtab->resolve_forwards(gsym);
 545
 546           gold_assert(gsym->has_symtab_index());
 547           new_symndx = gsym->symtab_index();
 548         }
 549
 550       // Get the new offset--the location in the output section where
 551       // this relocation should be applied.
 552
 553       Address offset = reloc.get_r_offset();
 554       Address new_offset;
 555       if (offset_in_output_section != invalid_address)
 556         new_offset = offset + offset_in_output_section;
 557       else
 558         {
 559           section_offset_type sot_offset =
 560               convert_types<section_offset_type, Address>(offset);
 561           section_offset_type new_sot_offset =
 562               output_section->output_offset(object, relinfo->data_shndx,
 563                                             sot_offset);
 564           gold_assert(new_sot_offset != -1);
 565           new_offset = new_sot_offset;
 566         }
 567
 568       // In an object file, r_offset is an offset within the section.
 569       // In an executable or dynamic object, generated by
 570       // --emit-relocs, r_offset is an absolute address.
 571       if (!parameters->options().relocatable())
 572         {
 573           new_offset += view_address;
 574           if (offset_in_output_section != invalid_address)
 575             new_offset -= offset_in_output_section;
 576         }
 577
 578       reloc_write.put_r_offset(new_offset);
 579       reloc_write.put_r_info(elfcpp::elf_r_info<size>(new_symndx, r_type));
 580
 581       // Handle the reloc addend based on the strategy.
 582
 583       if (strategy == Relocatable_relocs::RELOC_COPY)
 584         {
 585           if (sh_type == elfcpp::SHT_RELA)
 586             Reloc_types<sh_type, size, big_endian>::
 587               copy_reloc_addend(&reloc_write,
 588                                 &reloc);
 589         }
 590       else
 591         {
 592           // The relocation uses a section symbol in the input file.
 593           // We are adjusting it to use a section symbol in the output
 594           // file.  The input section symbol refers to some address in
 595           // the input section.  We need the relocation in the output
 596           // file to refer to that same address.  This adjustment to
 597           // the addend is the same calculation we use for a simple
 598           // absolute relocation for the input section symbol.
 599
 600           const Symbol_value<size>* psymval = object->local_symbol(r_sym);
 601
 602           unsigned char* padd = view + offset;
 603           switch (strategy)
 604             {
 605             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
 606               {
 607                 typename elfcpp::Elf_types<size>::Elf_Swxword addend;
 608                 addend = Reloc_types<sh_type, size, big_endian>::
 609                            get_reloc_addend(&reloc);
 610                 addend = psymval->value(object, addend);
 611                 Reloc_types<sh_type, size, big_endian>::
 612                   set_reloc_addend(&reloc_write, addend);
 613               }
 614               break;
 615
 616             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0:
 617               break;
 618
 619             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_1:
 620               Relocate_functions<size, big_endian>::rel8(padd, object,
 621                                                          psymval);
 622               break;
 623
 624             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_2:
 625               Relocate_functions<size, big_endian>::rel16(padd, object,
 626                                                           psymval);
 627               break;
 628
 629             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_4:
 630               Relocate_functions<size, big_endian>::rel32(padd, object,
 631                                                           psymval);
 632               break;
 633
 634             case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_8:
 635               Relocate_functions<size, big_endian>::rel64(padd, object,
 636                                                           psymval);
 637               break;
 638
 639             default:
 640               gold_unreachable();
 641             }
 642         }
 643
 644       pwrite += reloc_size;
 645     }
 646
 647   gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
 648               == reloc_view_size);
 649 }
 650
 651 } // End namespace gold.
 652
 653 #endif // !defined(GOLD_TARGET_RELOC_H)