bfd/elf64-sparc.c

   1 /* SPARC-specific support for 64-bit ELF
   2    Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   3    2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25 #include "elf-bfd.h"
  26 #include "elf/sparc.h"
  27 #include "opcode/sparc.h"
  28 #include "elfxx-sparc.h"
  29
  30 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value.  */
  31 #define MINUS_ONE (~ (bfd_vma) 0)
  32
  33 /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA
  34    section can represent up to two relocs, we must tell the user to allocate
  35    more space.  */
  36
  37 static long
  38 elf64_sparc_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
  39 {
  40   return (sec->reloc_count * 2 + 1) * sizeof (arelent *);
  41 }
  42
  43 static long
  44 elf64_sparc_get_dynamic_reloc_upper_bound (bfd *abfd)
  45 {
  46   return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2;
  47 }
  48
  49 /* Read  relocations for ASECT from REL_HDR.  There are RELOC_COUNT of
  50    them.  We cannot use generic elf routines for this,  because R_SPARC_OLO10
  51    has secondary addend in ELF64_R_TYPE_DATA.  We handle it as two relocations
  52    for the same location,  R_SPARC_LO10 and R_SPARC_13.  */
  53
  54 static bfd_boolean
  55 elf64_sparc_slurp_one_reloc_table (bfd *abfd, asection *asect,
  56                                    Elf_Internal_Shdr *rel_hdr,
  57                                    asymbol **symbols, bfd_boolean dynamic)
  58 {
  59   PTR allocated = NULL;
  60   bfd_byte *native_relocs;
  61   arelent *relent;
  62   unsigned int i;
  63   int entsize;
  64   bfd_size_type count;
  65   arelent *relents;
  66
  67   allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
  68   if (allocated == NULL)
  69     goto error_return;
  70
  71   if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
  72       || bfd_bread (allocated, rel_hdr->sh_size, abfd) != rel_hdr->sh_size)
  73     goto error_return;
  74
  75   native_relocs = (bfd_byte *) allocated;
  76
  77   relents = asect->relocation + canon_reloc_count (asect);
  78
  79   entsize = rel_hdr->sh_entsize;
  80   BFD_ASSERT (entsize == sizeof (Elf64_External_Rela));
  81
  82   count = rel_hdr->sh_size / entsize;
  83
  84   for (i = 0, relent = relents; i < count;
  85        i++, relent++, native_relocs += entsize)
  86     {
  87       Elf_Internal_Rela rela;
  88       unsigned int r_type;
  89
  90       bfd_elf64_swap_reloca_in (abfd, native_relocs, &rela);
  91
  92       /* The address of an ELF reloc is section relative for an object
  93          file, and absolute for an executable file or shared library.
  94          The address of a normal BFD reloc is always section relative,
  95          and the address of a dynamic reloc is absolute..  */
  96       if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
  97         relent->address = rela.r_offset;
  98       else
  99         relent->address = rela.r_offset - asect->vma;
 100
 101       if (ELF64_R_SYM (rela.r_info) == STN_UNDEF)
 102         relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 103       else
 104         {
 105           asymbol **ps, *s;
 106
 107           ps = symbols + ELF64_R_SYM (rela.r_info) - 1;
 108           s = *ps;
 109
 110           /* Canonicalize ELF section symbols.  FIXME: Why?  */
 111           if ((s->flags & BSF_SECTION_SYM) == 0)
 112             relent->sym_ptr_ptr = ps;
 113           else
 114             relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
 115         }
 116
 117       relent->addend = rela.r_addend;
 118
 119       r_type = ELF64_R_TYPE_ID (rela.r_info);
 120       if (r_type == R_SPARC_OLO10)
 121         {
 122           relent->howto = _bfd_sparc_elf_info_to_howto_ptr (R_SPARC_LO10);
 123           relent[1].address = relent->address;
 124           relent++;
 125           relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 126           relent->addend = ELF64_R_TYPE_DATA (rela.r_info);
 127           relent->howto = _bfd_sparc_elf_info_to_howto_ptr (R_SPARC_13);
 128         }
 129       else
 130         relent->howto = _bfd_sparc_elf_info_to_howto_ptr (r_type);
 131     }
 132
 133   canon_reloc_count (asect) += relent - relents;
 134
 135   if (allocated != NULL)
 136     free (allocated);
 137
 138   return TRUE;
 139
 140  error_return:
 141   if (allocated != NULL)
 142     free (allocated);
 143   return FALSE;
 144 }
 145
 146 /* Read in and swap the external relocs.  */
 147
 148 static bfd_boolean
 149 elf64_sparc_slurp_reloc_table (bfd *abfd, asection *asect,
 150                                asymbol **symbols, bfd_boolean dynamic)
 151 {
 152   struct bfd_elf_section_data * const d = elf_section_data (asect);
 153   Elf_Internal_Shdr *rel_hdr;
 154   Elf_Internal_Shdr *rel_hdr2;
 155   bfd_size_type amt;
 156
 157   if (asect->relocation != NULL)
 158     return TRUE;
 159
 160   if (! dynamic)
 161     {
 162       if ((asect->flags & SEC_RELOC) == 0
 163           || asect->reloc_count == 0)
 164         return TRUE;
 165
 166       rel_hdr = &d->rel_hdr;
 167       rel_hdr2 = d->rel_hdr2;
 168
 169       BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
 170                   || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
 171     }
 172   else
 173     {
 174       /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
 175          case because relocations against this section may use the
 176          dynamic symbol table, and in that case bfd_section_from_shdr
 177          in elf.c does not update the RELOC_COUNT.  */
 178       if (asect->size == 0)
 179         return TRUE;
 180
 181       rel_hdr = &d->this_hdr;
 182       asect->reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
 183       rel_hdr2 = NULL;
 184     }
 185
 186   amt = asect->reloc_count;
 187   amt *= 2 * sizeof (arelent);
 188   asect->relocation = (arelent *) bfd_alloc (abfd, amt);
 189   if (asect->relocation == NULL)
 190     return FALSE;
 191
 192   /* The elf64_sparc_slurp_one_reloc_table routine increments
 193      canon_reloc_count.  */
 194   canon_reloc_count (asect) = 0;
 195
 196   if (!elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols,
 197                                           dynamic))
 198     return FALSE;
 199
 200   if (rel_hdr2
 201       && !elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols,
 202                                              dynamic))
 203     return FALSE;
 204
 205   return TRUE;
 206 }
 207
 208 /* Canonicalize the relocs.  */
 209
 210 static long
 211 elf64_sparc_canonicalize_reloc (bfd *abfd, sec_ptr section,
 212                                 arelent **relptr, asymbol **symbols)
 213 {
 214   arelent *tblptr;
 215   unsigned int i;
 216   const struct elf_backend_data *bed = get_elf_backend_data (abfd);
 217
 218   if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
 219     return -1;
 220
 221   tblptr = section->relocation;
 222   for (i = 0; i < canon_reloc_count (section); i++)
 223     *relptr++ = tblptr++;
 224
 225   *relptr = NULL;
 226
 227   return canon_reloc_count (section);
 228 }
 229
 230
 231 /* Canonicalize the dynamic relocation entries.  Note that we return
 232    the dynamic relocations as a single block, although they are
 233    actually associated with particular sections; the interface, which
 234    was designed for SunOS style shared libraries, expects that there
 235    is only one set of dynamic relocs.  Any section that was actually
 236    installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
 237    the dynamic symbol table, is considered to be a dynamic reloc
 238    section.  */
 239
 240 static long
 241 elf64_sparc_canonicalize_dynamic_reloc (bfd *abfd, arelent **storage,
 242                                         asymbol **syms)
 243 {
 244   asection *s;
 245   long ret;
 246
 247   if (elf_dynsymtab (abfd) == 0)
 248     {
 249       bfd_set_error (bfd_error_invalid_operation);
 250       return -1;
 251     }
 252
 253   ret = 0;
 254   for (s = abfd->sections; s != NULL; s = s->next)
 255     {
 256       if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
 257           && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
 258         {
 259           arelent *p;
 260           long count, i;
 261
 262           if (! elf64_sparc_slurp_reloc_table (abfd, s, syms, TRUE))
 263             return -1;
 264           count = canon_reloc_count (s);
 265           p = s->relocation;
 266           for (i = 0; i < count; i++)
 267             *storage++ = p++;
 268           ret += count;
 269         }
 270     }
 271
 272   *storage = NULL;
 273
 274   return ret;
 275 }
 276
 277 /* Write out the relocs.  */
 278
 279 static void
 280 elf64_sparc_write_relocs (bfd *abfd, asection *sec, PTR data)
 281 {
 282   bfd_boolean *failedp = (bfd_boolean *) data;
 283   Elf_Internal_Shdr *rela_hdr;
 284   bfd_vma addr_offset;
 285   Elf64_External_Rela *outbound_relocas, *src_rela;
 286   unsigned int idx, count;
 287   asymbol *last_sym = 0;
 288   int last_sym_idx = 0;
 289
 290   /* If we have already failed, don't do anything.  */
 291   if (*failedp)
 292     return;
 293
 294   if ((sec->flags & SEC_RELOC) == 0)
 295     return;
 296
 297   /* The linker backend writes the relocs out itself, and sets the
 298      reloc_count field to zero to inhibit writing them here.  Also,
 299      sometimes the SEC_RELOC flag gets set even when there aren't any
 300      relocs.  */
 301   if (sec->reloc_count == 0)
 302     return;
 303
 304   /* We can combine two relocs that refer to the same address
 305      into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the
 306      latter is R_SPARC_13 with no associated symbol.  */
 307   count = 0;
 308   for (idx = 0; idx < sec->reloc_count; idx++)
 309     {
 310       bfd_vma addr;
 311
 312       ++count;
 313
 314       addr = sec->orelocation[idx]->address;
 315       if (sec->orelocation[idx]->howto->type == R_SPARC_LO10
 316           && idx < sec->reloc_count - 1)
 317         {
 318           arelent *r = sec->orelocation[idx + 1];
 319
 320           if (r->howto->type == R_SPARC_13
 321               && r->address == addr
 322               && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
 323               && (*r->sym_ptr_ptr)->value == 0)
 324             ++idx;
 325         }
 326     }
 327
 328   rela_hdr = &elf_section_data (sec)->rel_hdr;
 329
 330   rela_hdr->sh_size = rela_hdr->sh_entsize * count;
 331   rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
 332   if (rela_hdr->contents == NULL)
 333     {
 334       *failedp = TRUE;
 335       return;
 336     }
 337
 338   /* Figure out whether the relocations are RELA or REL relocations.  */
 339   if (rela_hdr->sh_type != SHT_RELA)
 340     abort ();
 341
 342   /* The address of an ELF reloc is section relative for an object
 343      file, and absolute for an executable file or shared library.
 344      The address of a BFD reloc is always section relative.  */
 345   addr_offset = 0;
 346   if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
 347     addr_offset = sec->vma;
 348
 349   /* orelocation has the data, reloc_count has the count...  */
 350   outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents;
 351   src_rela = outbound_relocas;
 352
 353   for (idx = 0; idx < sec->reloc_count; idx++)
 354     {
 355       Elf_Internal_Rela dst_rela;
 356       arelent *ptr;
 357       asymbol *sym;
 358       int n;
 359
 360       ptr = sec->orelocation[idx];
 361       sym = *ptr->sym_ptr_ptr;
 362       if (sym == last_sym)
 363         n = last_sym_idx;
 364       else if (bfd_is_abs_section (sym->section) && sym->value == 0)
 365         n = STN_UNDEF;
 366       else
 367         {
 368           last_sym = sym;
 369           n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
 370           if (n < 0)
 371             {
 372               *failedp = TRUE;
 373               return;
 374             }
 375           last_sym_idx = n;
 376         }
 377
 378       if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
 379           && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
 380           && ! _bfd_elf_validate_reloc (abfd, ptr))
 381         {
 382           *failedp = TRUE;
 383           return;
 384         }
 385
 386       if (ptr->howto->type == R_SPARC_LO10
 387           && idx < sec->reloc_count - 1)
 388         {
 389           arelent *r = sec->orelocation[idx + 1];
 390
 391           if (r->howto->type == R_SPARC_13
 392               && r->address == ptr->address
 393               && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
 394               && (*r->sym_ptr_ptr)->value == 0)
 395             {
 396               idx++;
 397               dst_rela.r_info
 398                 = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend,
 399                                                       R_SPARC_OLO10));
 400             }
 401           else
 402             dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10);
 403         }
 404       else
 405         dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type);
 406
 407       dst_rela.r_offset = ptr->address + addr_offset;
 408       dst_rela.r_addend = ptr->addend;
 409
 410       bfd_elf64_swap_reloca_out (abfd, &dst_rela, (bfd_byte *) src_rela);
 411       ++src_rela;
 412     }
 413 }
 414 \f
 415 /* Hook called by the linker routine which adds symbols from an object
 416    file.  We use it for STT_REGISTER symbols.  */
 417
 418 static bfd_boolean
 419 elf64_sparc_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
 420                              Elf_Internal_Sym *sym, const char **namep,
 421                              flagword *flagsp ATTRIBUTE_UNUSED,
 422                              asection **secp ATTRIBUTE_UNUSED,
 423                              bfd_vma *valp ATTRIBUTE_UNUSED)
 424 {
 425   static const char *const stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" };
 426
 427   if ((abfd->flags & DYNAMIC) == 0
 428       && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
 429     elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
 430
 431   if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER)
 432     {
 433       int reg;
 434       struct _bfd_sparc_elf_app_reg *p;
 435
 436       reg = (int)sym->st_value;
 437       switch (reg & ~1)
 438         {
 439         case 2: reg -= 2; break;
 440         case 6: reg -= 4; break;
 441         default:
 442           (*_bfd_error_handler)
 443             (_("%B: Only registers %%g[2367] can be declared using STT_REGISTER"),
 444              abfd);
 445           return FALSE;
 446         }
 447
 448       if (info->output_bfd->xvec != abfd->xvec
 449           || (abfd->flags & DYNAMIC) != 0)
 450         {
 451           /* STT_REGISTER only works when linking an elf64_sparc object.
 452              If STT_REGISTER comes from a dynamic object, don't put it into
 453              the output bfd.  The dynamic linker will recheck it.  */
 454           *namep = NULL;
 455           return TRUE;
 456         }
 457
 458       p = _bfd_sparc_elf_hash_table(info)->app_regs + reg;
 459
 460       if (p->name != NULL && strcmp (p->name, *namep))
 461         {
 462           (*_bfd_error_handler)
 463             (_("Register %%g%d used incompatibly: %s in %B, previously %s in %B"),
 464              abfd, p->abfd, (int) sym->st_value,
 465              **namep ? *namep : "#scratch",
 466              *p->name ? p->name : "#scratch");
 467           return FALSE;
 468         }
 469
 470       if (p->name == NULL)
 471         {
 472           if (**namep)
 473             {
 474               struct elf_link_hash_entry *h;
 475
 476               h = (struct elf_link_hash_entry *)
 477                 bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE);
 478
 479               if (h != NULL)
 480                 {
 481                   unsigned char type = h->type;
 482
 483                   if (type > STT_FUNC)
 484                     type = 0;
 485                   (*_bfd_error_handler)
 486                     (_("Symbol `%s' has differing types: REGISTER in %B, previously %s in %B"),
 487                      abfd, p->abfd, *namep, stt_types[type]);
 488                   return FALSE;
 489                 }
 490
 491               p->name = bfd_hash_allocate (&info->hash->table,
 492                                            strlen (*namep) + 1);
 493               if (!p->name)
 494                 return FALSE;
 495
 496               strcpy (p->name, *namep);
 497             }
 498           else
 499             p->name = "";
 500           p->bind = ELF_ST_BIND (sym->st_info);
 501           p->abfd = abfd;
 502           p->shndx = sym->st_shndx;
 503         }
 504       else
 505         {
 506           if (p->bind == STB_WEAK
 507               && ELF_ST_BIND (sym->st_info) == STB_GLOBAL)
 508             {
 509               p->bind = STB_GLOBAL;
 510               p->abfd = abfd;
 511             }
 512         }
 513       *namep = NULL;
 514       return TRUE;
 515     }
 516   else if (*namep && **namep
 517            && info->output_bfd->xvec == abfd->xvec)
 518     {
 519       int i;
 520       struct _bfd_sparc_elf_app_reg *p;
 521
 522       p = _bfd_sparc_elf_hash_table(info)->app_regs;
 523       for (i = 0; i < 4; i++, p++)
 524         if (p->name != NULL && ! strcmp (p->name, *namep))
 525           {
 526             unsigned char type = ELF_ST_TYPE (sym->st_info);
 527
 528             if (type > STT_FUNC)
 529               type = 0;
 530             (*_bfd_error_handler)
 531               (_("Symbol `%s' has differing types: %s in %B, previously REGISTER in %B"),
 532                abfd, p->abfd, *namep, stt_types[type]);
 533             return FALSE;
 534           }
 535     }
 536   return TRUE;
 537 }
 538
 539 /* This function takes care of emitting STT_REGISTER symbols
 540    which we cannot easily keep in the symbol hash table.  */
 541
 542 static bfd_boolean
 543 elf64_sparc_output_arch_syms (bfd *output_bfd ATTRIBUTE_UNUSED,
 544                               struct bfd_link_info *info,
 545                               PTR finfo,
 546                               int (*func) (PTR, const char *,
 547                                            Elf_Internal_Sym *,
 548                                            asection *,
 549                                            struct elf_link_hash_entry *))
 550 {
 551   int reg;
 552   struct _bfd_sparc_elf_app_reg *app_regs =
 553     _bfd_sparc_elf_hash_table(info)->app_regs;
 554   Elf_Internal_Sym sym;
 555
 556   /* We arranged in size_dynamic_sections to put the STT_REGISTER entries
 557      at the end of the dynlocal list, so they came at the end of the local
 558      symbols in the symtab.  Except that they aren't STB_LOCAL, so we need
 559      to back up symtab->sh_info.  */
 560   if (elf_hash_table (info)->dynlocal)
 561     {
 562       bfd * dynobj = elf_hash_table (info)->dynobj;
 563       asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym");
 564       struct elf_link_local_dynamic_entry *e;
 565
 566       for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
 567         if (e->input_indx == -1)
 568           break;
 569       if (e)
 570         {
 571           elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
 572             = e->dynindx;
 573         }
 574     }
 575
 576   if (info->strip == strip_all)
 577     return TRUE;
 578
 579   for (reg = 0; reg < 4; reg++)
 580     if (app_regs [reg].name != NULL)
 581       {
 582         if (info->strip == strip_some
 583             && bfd_hash_lookup (info->keep_hash,
 584                                 app_regs [reg].name,
 585                                 FALSE, FALSE) == NULL)
 586           continue;
 587
 588         sym.st_value = reg < 2 ? reg + 2 : reg + 4;
 589         sym.st_size = 0;
 590         sym.st_other = 0;
 591         sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER);
 592         sym.st_shndx = app_regs [reg].shndx;
 593         if ((*func) (finfo, app_regs [reg].name, &sym,
 594                      sym.st_shndx == SHN_ABS
 595                      ? bfd_abs_section_ptr : bfd_und_section_ptr,
 596                      NULL) != 1)
 597           return FALSE;
 598       }
 599
 600   return TRUE;
 601 }
 602
 603 static int
 604 elf64_sparc_get_symbol_type (Elf_Internal_Sym *elf_sym, int type)
 605 {
 606   if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER)
 607     return STT_REGISTER;
 608   else
 609     return type;
 610 }
 611
 612 /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL
 613    even in SHN_UNDEF section.  */
 614
 615 static void
 616 elf64_sparc_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym)
 617 {
 618   elf_symbol_type *elfsym;
 619
 620   elfsym = (elf_symbol_type *) asym;
 621   if (elfsym->internal_elf_sym.st_info
 622       == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER))
 623     {
 624       asym->flags |= BSF_GLOBAL;
 625     }
 626 }
 627
 628 \f
 629 /* Functions for dealing with the e_flags field.  */
 630
 631 /* Merge backend specific data from an object file to the output
 632    object file when linking.  */
 633
 634 static bfd_boolean
 635 elf64_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
 636 {
 637   bfd_boolean error;
 638   flagword new_flags, old_flags;
 639   int new_mm, old_mm;
 640
 641   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
 642       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
 643     return TRUE;
 644
 645   new_flags = elf_elfheader (ibfd)->e_flags;
 646   old_flags = elf_elfheader (obfd)->e_flags;
 647
 648   if (!elf_flags_init (obfd))   /* First call, no flags set */
 649     {
 650       elf_flags_init (obfd) = TRUE;
 651       elf_elfheader (obfd)->e_flags = new_flags;
 652     }
 653
 654   else if (new_flags == old_flags)      /* Compatible flags are ok */
 655     ;
 656
 657   else                                  /* Incompatible flags */
 658     {
 659       error = FALSE;
 660
 661 #define EF_SPARC_ISA_EXTENSIONS \
 662   (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1)
 663
 664       if ((ibfd->flags & DYNAMIC) != 0)
 665         {
 666           /* We don't want dynamic objects memory ordering and
 667              architecture to have any role. That's what dynamic linker
 668              should do.  */
 669           new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS);
 670           new_flags |= (old_flags
 671                         & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS));
 672         }
 673       else
 674         {
 675           /* Choose the highest architecture requirements.  */
 676           old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS);
 677           new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS);
 678           if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3))
 679               && (old_flags & EF_SPARC_HAL_R1))
 680             {
 681               error = TRUE;
 682               (*_bfd_error_handler)
 683                 (_("%B: linking UltraSPARC specific with HAL specific code"),
 684                  ibfd);
 685             }
 686           /* Choose the most restrictive memory ordering.  */
 687           old_mm = (old_flags & EF_SPARCV9_MM);
 688           new_mm = (new_flags & EF_SPARCV9_MM);
 689           old_flags &= ~EF_SPARCV9_MM;
 690           new_flags &= ~EF_SPARCV9_MM;
 691           if (new_mm < old_mm)
 692             old_mm = new_mm;
 693           old_flags |= old_mm;
 694           new_flags |= old_mm;
 695         }
 696
 697       /* Warn about any other mismatches */
 698       if (new_flags != old_flags)
 699         {
 700           error = TRUE;
 701           (*_bfd_error_handler)
 702             (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
 703              ibfd, (long) new_flags, (long) old_flags);
 704         }
 705
 706       elf_elfheader (obfd)->e_flags = old_flags;
 707
 708       if (error)
 709         {
 710           bfd_set_error (bfd_error_bad_value);
 711           return FALSE;
 712         }
 713     }
 714   return TRUE;
 715 }
 716
 717 /* MARCO: Set the correct entry size for the .stab section.  */
 718
 719 static bfd_boolean
 720 elf64_sparc_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
 721                            Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED,
 722                            asection *sec)
 723 {
 724   const char *name;
 725
 726   name = bfd_get_section_name (abfd, sec);
 727
 728   if (strcmp (name, ".stab") == 0)
 729     {
 730       /* Even in the 64bit case the stab entries are only 12 bytes long.  */
 731       elf_section_data (sec)->this_hdr.sh_entsize = 12;
 732     }
 733
 734   return TRUE;
 735 }
 736 \f
 737 /* Print a STT_REGISTER symbol to file FILE.  */
 738
 739 static const char *
 740 elf64_sparc_print_symbol_all (bfd *abfd ATTRIBUTE_UNUSED, PTR filep,
 741                               asymbol *symbol)
 742 {
 743   FILE *file = (FILE *) filep;
 744   int reg, type;
 745
 746   if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info)
 747       != STT_REGISTER)
 748     return NULL;
 749
 750   reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
 751   type = symbol->flags;
 752   fprintf (file, "REG_%c%c%11s%c%c    R", "GOLI" [reg / 8], '0' + (reg & 7), "",
 753                  ((type & BSF_LOCAL)
 754                   ? (type & BSF_GLOBAL) ? '!' : 'l'
 755                   : (type & BSF_GLOBAL) ? 'g' : ' '),
 756                  (type & BSF_WEAK) ? 'w' : ' ');
 757   if (symbol->name == NULL || symbol->name [0] == '\0')
 758     return "#scratch";
 759   else
 760     return symbol->name;
 761 }
 762 \f
 763 static enum elf_reloc_type_class
 764 elf64_sparc_reloc_type_class (const Elf_Internal_Rela *rela)
 765 {
 766   switch ((int) ELF64_R_TYPE (rela->r_info))
 767     {
 768     case R_SPARC_RELATIVE:
 769       return reloc_class_relative;
 770     case R_SPARC_JMP_SLOT:
 771       return reloc_class_plt;
 772     case R_SPARC_COPY:
 773       return reloc_class_copy;
 774     default:
 775       return reloc_class_normal;
 776     }
 777 }
 778
 779 /* Relocations in the 64 bit SPARC ELF ABI are more complex than in
 780    standard ELF, because R_SPARC_OLO10 has secondary addend in
 781    ELF64_R_TYPE_DATA field.  This structure is used to redirect the
 782    relocation handling routines.  */
 783
 784 const struct elf_size_info elf64_sparc_size_info =
 785 {
 786   sizeof (Elf64_External_Ehdr),
 787   sizeof (Elf64_External_Phdr),
 788   sizeof (Elf64_External_Shdr),
 789   sizeof (Elf64_External_Rel),
 790   sizeof (Elf64_External_Rela),
 791   sizeof (Elf64_External_Sym),
 792   sizeof (Elf64_External_Dyn),
 793   sizeof (Elf_External_Note),
 794   4,            /* hash-table entry size.  */
 795   /* Internal relocations per external relocations.
 796      For link purposes we use just 1 internal per
 797      1 external, for assembly and slurp symbol table
 798      we use 2.  */
 799   1,
 800   64,           /* arch_size.  */
 801   3,            /* log_file_align.  */
 802   ELFCLASS64,
 803   EV_CURRENT,
 804   bfd_elf64_write_out_phdrs,
 805   bfd_elf64_write_shdrs_and_ehdr,
 806   bfd_elf64_checksum_contents,
 807   elf64_sparc_write_relocs,
 808   bfd_elf64_swap_symbol_in,
 809   bfd_elf64_swap_symbol_out,
 810   elf64_sparc_slurp_reloc_table,
 811   bfd_elf64_slurp_symbol_table,
 812   bfd_elf64_swap_dyn_in,
 813   bfd_elf64_swap_dyn_out,
 814   bfd_elf64_swap_reloc_in,
 815   bfd_elf64_swap_reloc_out,
 816   bfd_elf64_swap_reloca_in,
 817   bfd_elf64_swap_reloca_out
 818 };
 819
 820 #define TARGET_BIG_SYM  bfd_elf64_sparc_vec
 821 #define TARGET_BIG_NAME "elf64-sparc"
 822 #define ELF_ARCH        bfd_arch_sparc
 823 #define ELF_MAXPAGESIZE 0x100000
 824 #define ELF_COMMONPAGESIZE 0x2000
 825
 826 /* This is the official ABI value.  */
 827 #define ELF_MACHINE_CODE EM_SPARCV9
 828
 829 /* This is the value that we used before the ABI was released.  */
 830 #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9
 831
 832 #define elf_backend_reloc_type_class \
 833   elf64_sparc_reloc_type_class
 834 #define bfd_elf64_get_reloc_upper_bound \
 835   elf64_sparc_get_reloc_upper_bound
 836 #define bfd_elf64_get_dynamic_reloc_upper_bound \
 837   elf64_sparc_get_dynamic_reloc_upper_bound
 838 #define bfd_elf64_canonicalize_reloc \
 839   elf64_sparc_canonicalize_reloc
 840 #define bfd_elf64_canonicalize_dynamic_reloc \
 841   elf64_sparc_canonicalize_dynamic_reloc
 842 #define elf_backend_add_symbol_hook \
 843   elf64_sparc_add_symbol_hook
 844 #define elf_backend_get_symbol_type \
 845   elf64_sparc_get_symbol_type
 846 #define elf_backend_symbol_processing \
 847   elf64_sparc_symbol_processing
 848 #define elf_backend_print_symbol_all \
 849   elf64_sparc_print_symbol_all
 850 #define elf_backend_output_arch_syms \
 851   elf64_sparc_output_arch_syms
 852 #define bfd_elf64_bfd_merge_private_bfd_data \
 853   elf64_sparc_merge_private_bfd_data
 854 #define elf_backend_fake_sections \
 855   elf64_sparc_fake_sections
 856 #define elf_backend_size_info \
 857   elf64_sparc_size_info
 858
 859 #define elf_backend_plt_sym_val \
 860   _bfd_sparc_elf_plt_sym_val
 861 #define bfd_elf64_bfd_link_hash_table_create \
 862   _bfd_sparc_elf_link_hash_table_create
 863 #define bfd_elf64_bfd_link_hash_table_free \
 864   _bfd_sparc_elf_link_hash_table_free
 865 #define elf_info_to_howto \
 866   _bfd_sparc_elf_info_to_howto
 867 #define elf_backend_copy_indirect_symbol \
 868   _bfd_sparc_elf_copy_indirect_symbol
 869 #define bfd_elf64_bfd_reloc_type_lookup \
 870   _bfd_sparc_elf_reloc_type_lookup
 871 #define bfd_elf64_bfd_reloc_name_lookup \
 872   _bfd_sparc_elf_reloc_name_lookup
 873 #define bfd_elf64_bfd_relax_section \
 874   _bfd_sparc_elf_relax_section
 875 #define bfd_elf64_new_section_hook \
 876   _bfd_sparc_elf_new_section_hook
 877
 878 #define elf_backend_create_dynamic_sections \
 879   _bfd_sparc_elf_create_dynamic_sections
 880 #define elf_backend_relocs_compatible \
 881   _bfd_elf_relocs_compatible
 882 #define elf_backend_check_relocs \
 883   _bfd_sparc_elf_check_relocs
 884 #define elf_backend_adjust_dynamic_symbol \
 885   _bfd_sparc_elf_adjust_dynamic_symbol
 886 #define elf_backend_omit_section_dynsym \
 887   _bfd_sparc_elf_omit_section_dynsym
 888 #define elf_backend_size_dynamic_sections \
 889   _bfd_sparc_elf_size_dynamic_sections
 890 #define elf_backend_relocate_section \
 891   _bfd_sparc_elf_relocate_section
 892 #define elf_backend_finish_dynamic_symbol \
 893   _bfd_sparc_elf_finish_dynamic_symbol
 894 #define elf_backend_finish_dynamic_sections \
 895   _bfd_sparc_elf_finish_dynamic_sections
 896
 897 #define bfd_elf64_mkobject \
 898   _bfd_sparc_elf_mkobject
 899 #define elf_backend_object_p \
 900   _bfd_sparc_elf_object_p
 901 #define elf_backend_gc_mark_hook \
 902   _bfd_sparc_elf_gc_mark_hook
 903 #define elf_backend_gc_sweep_hook \
 904   _bfd_sparc_elf_gc_sweep_hook
 905 #define elf_backend_init_index_section \
 906   _bfd_elf_init_1_index_section
 907
 908 #define elf_backend_can_gc_sections 1
 909 #define elf_backend_can_refcount 1
 910 #define elf_backend_want_got_plt 0
 911 #define elf_backend_plt_readonly 0
 912 #define elf_backend_want_plt_sym 1
 913 #define elf_backend_got_header_size 8
 914 #define elf_backend_rela_normal 1
 915
 916 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table.  */
 917 #define elf_backend_plt_alignment 8
 918
 919 #define elf_backend_post_process_headers        _bfd_elf_set_osabi
 920
 921 #include "elf64-target.h"
 922
 923 /* FreeBSD support */
 924 #undef  TARGET_BIG_SYM
 925 #define TARGET_BIG_SYM bfd_elf64_sparc_freebsd_vec
 926 #undef  TARGET_BIG_NAME
 927 #define TARGET_BIG_NAME "elf64-sparc-freebsd"
 928 #undef  ELF_OSABI
 929 #define ELF_OSABI ELFOSABI_FREEBSD
 930
 931 #undef  elf64_bed
 932 #define elf64_bed                               elf64_sparc_fbsd_bed
 933
 934 #include "elf64-target.h"
 935