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, 2007, 2008 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) == 0)
 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 (ELF_ST_TYPE (sym->st_info) == STT_REGISTER)
 428     {
 429       int reg;
 430       struct _bfd_sparc_elf_app_reg *p;
 431
 432       reg = (int)sym->st_value;
 433       switch (reg & ~1)
 434         {
 435         case 2: reg -= 2; break;
 436         case 6: reg -= 4; break;
 437         default:
 438           (*_bfd_error_handler)
 439             (_("%B: Only registers %%g[2367] can be declared using STT_REGISTER"),
 440              abfd);
 441           return FALSE;
 442         }
 443
 444       if (info->output_bfd->xvec != abfd->xvec
 445           || (abfd->flags & DYNAMIC) != 0)
 446         {
 447           /* STT_REGISTER only works when linking an elf64_sparc object.
 448              If STT_REGISTER comes from a dynamic object, don't put it into
 449              the output bfd.  The dynamic linker will recheck it.  */
 450           *namep = NULL;
 451           return TRUE;
 452         }
 453
 454       p = _bfd_sparc_elf_hash_table(info)->app_regs + reg;
 455
 456       if (p->name != NULL && strcmp (p->name, *namep))
 457         {
 458           (*_bfd_error_handler)
 459             (_("Register %%g%d used incompatibly: %s in %B, previously %s in %B"),
 460              abfd, p->abfd, (int) sym->st_value,
 461              **namep ? *namep : "#scratch",
 462              *p->name ? p->name : "#scratch");
 463           return FALSE;
 464         }
 465
 466       if (p->name == NULL)
 467         {
 468           if (**namep)
 469             {
 470               struct elf_link_hash_entry *h;
 471
 472               h = (struct elf_link_hash_entry *)
 473                 bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE);
 474
 475               if (h != NULL)
 476                 {
 477                   unsigned char type = h->type;
 478
 479                   if (type > STT_FUNC)
 480                     type = 0;
 481                   (*_bfd_error_handler)
 482                     (_("Symbol `%s' has differing types: REGISTER in %B, previously %s in %B"),
 483                      abfd, p->abfd, *namep, stt_types[type]);
 484                   return FALSE;
 485                 }
 486
 487               p->name = bfd_hash_allocate (&info->hash->table,
 488                                            strlen (*namep) + 1);
 489               if (!p->name)
 490                 return FALSE;
 491
 492               strcpy (p->name, *namep);
 493             }
 494           else
 495             p->name = "";
 496           p->bind = ELF_ST_BIND (sym->st_info);
 497           p->abfd = abfd;
 498           p->shndx = sym->st_shndx;
 499         }
 500       else
 501         {
 502           if (p->bind == STB_WEAK
 503               && ELF_ST_BIND (sym->st_info) == STB_GLOBAL)
 504             {
 505               p->bind = STB_GLOBAL;
 506               p->abfd = abfd;
 507             }
 508         }
 509       *namep = NULL;
 510       return TRUE;
 511     }
 512   else if (*namep && **namep
 513            && info->output_bfd->xvec == abfd->xvec)
 514     {
 515       int i;
 516       struct _bfd_sparc_elf_app_reg *p;
 517
 518       p = _bfd_sparc_elf_hash_table(info)->app_regs;
 519       for (i = 0; i < 4; i++, p++)
 520         if (p->name != NULL && ! strcmp (p->name, *namep))
 521           {
 522             unsigned char type = ELF_ST_TYPE (sym->st_info);
 523
 524             if (type > STT_FUNC)
 525               type = 0;
 526             (*_bfd_error_handler)
 527               (_("Symbol `%s' has differing types: %s in %B, previously REGISTER in %B"),
 528                abfd, p->abfd, *namep, stt_types[type]);
 529             return FALSE;
 530           }
 531     }
 532   return TRUE;
 533 }
 534
 535 /* This function takes care of emitting STT_REGISTER symbols
 536    which we cannot easily keep in the symbol hash table.  */
 537
 538 static bfd_boolean
 539 elf64_sparc_output_arch_syms (bfd *output_bfd ATTRIBUTE_UNUSED,
 540                               struct bfd_link_info *info,
 541                               PTR finfo,
 542                               int (*func) (PTR, const char *,
 543                                            Elf_Internal_Sym *,
 544                                            asection *,
 545                                            struct elf_link_hash_entry *))
 546 {
 547   int reg;
 548   struct _bfd_sparc_elf_app_reg *app_regs =
 549     _bfd_sparc_elf_hash_table(info)->app_regs;
 550   Elf_Internal_Sym sym;
 551
 552   /* We arranged in size_dynamic_sections to put the STT_REGISTER entries
 553      at the end of the dynlocal list, so they came at the end of the local
 554      symbols in the symtab.  Except that they aren't STB_LOCAL, so we need
 555      to back up symtab->sh_info.  */
 556   if (elf_hash_table (info)->dynlocal)
 557     {
 558       bfd * dynobj = elf_hash_table (info)->dynobj;
 559       asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym");
 560       struct elf_link_local_dynamic_entry *e;
 561
 562       for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
 563         if (e->input_indx == -1)
 564           break;
 565       if (e)
 566         {
 567           elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
 568             = e->dynindx;
 569         }
 570     }
 571
 572   if (info->strip == strip_all)
 573     return TRUE;
 574
 575   for (reg = 0; reg < 4; reg++)
 576     if (app_regs [reg].name != NULL)
 577       {
 578         if (info->strip == strip_some
 579             && bfd_hash_lookup (info->keep_hash,
 580                                 app_regs [reg].name,
 581                                 FALSE, FALSE) == NULL)
 582           continue;
 583
 584         sym.st_value = reg < 2 ? reg + 2 : reg + 4;
 585         sym.st_size = 0;
 586         sym.st_other = 0;
 587         sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER);
 588         sym.st_shndx = app_regs [reg].shndx;
 589         if ((*func) (finfo, app_regs [reg].name, &sym,
 590                      sym.st_shndx == SHN_ABS
 591                      ? bfd_abs_section_ptr : bfd_und_section_ptr,
 592                      NULL) != 1)
 593           return FALSE;
 594       }
 595
 596   return TRUE;
 597 }
 598
 599 static int
 600 elf64_sparc_get_symbol_type (Elf_Internal_Sym *elf_sym, int type)
 601 {
 602   if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER)
 603     return STT_REGISTER;
 604   else
 605     return type;
 606 }
 607
 608 /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL
 609    even in SHN_UNDEF section.  */
 610
 611 static void
 612 elf64_sparc_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym)
 613 {
 614   elf_symbol_type *elfsym;
 615
 616   elfsym = (elf_symbol_type *) asym;
 617   if (elfsym->internal_elf_sym.st_info
 618       == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER))
 619     {
 620       asym->flags |= BSF_GLOBAL;
 621     }
 622 }
 623
 624 \f
 625 /* Functions for dealing with the e_flags field.  */
 626
 627 /* Merge backend specific data from an object file to the output
 628    object file when linking.  */
 629
 630 static bfd_boolean
 631 elf64_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
 632 {
 633   bfd_boolean error;
 634   flagword new_flags, old_flags;
 635   int new_mm, old_mm;
 636
 637   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
 638       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
 639     return TRUE;
 640
 641   new_flags = elf_elfheader (ibfd)->e_flags;
 642   old_flags = elf_elfheader (obfd)->e_flags;
 643
 644   if (!elf_flags_init (obfd))   /* First call, no flags set */
 645     {
 646       elf_flags_init (obfd) = TRUE;
 647       elf_elfheader (obfd)->e_flags = new_flags;
 648     }
 649
 650   else if (new_flags == old_flags)      /* Compatible flags are ok */
 651     ;
 652
 653   else                                  /* Incompatible flags */
 654     {
 655       error = FALSE;
 656
 657 #define EF_SPARC_ISA_EXTENSIONS \
 658   (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1)
 659
 660       if ((ibfd->flags & DYNAMIC) != 0)
 661         {
 662           /* We don't want dynamic objects memory ordering and
 663              architecture to have any role. That's what dynamic linker
 664              should do.  */
 665           new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS);
 666           new_flags |= (old_flags
 667                         & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS));
 668         }
 669       else
 670         {
 671           /* Choose the highest architecture requirements.  */
 672           old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS);
 673           new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS);
 674           if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3))
 675               && (old_flags & EF_SPARC_HAL_R1))
 676             {
 677               error = TRUE;
 678               (*_bfd_error_handler)
 679                 (_("%B: linking UltraSPARC specific with HAL specific code"),
 680                  ibfd);
 681             }
 682           /* Choose the most restrictive memory ordering.  */
 683           old_mm = (old_flags & EF_SPARCV9_MM);
 684           new_mm = (new_flags & EF_SPARCV9_MM);
 685           old_flags &= ~EF_SPARCV9_MM;
 686           new_flags &= ~EF_SPARCV9_MM;
 687           if (new_mm < old_mm)
 688             old_mm = new_mm;
 689           old_flags |= old_mm;
 690           new_flags |= old_mm;
 691         }
 692
 693       /* Warn about any other mismatches */
 694       if (new_flags != old_flags)
 695         {
 696           error = TRUE;
 697           (*_bfd_error_handler)
 698             (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
 699              ibfd, (long) new_flags, (long) old_flags);
 700         }
 701
 702       elf_elfheader (obfd)->e_flags = old_flags;
 703
 704       if (error)
 705         {
 706           bfd_set_error (bfd_error_bad_value);
 707           return FALSE;
 708         }
 709     }
 710   return TRUE;
 711 }
 712
 713 /* MARCO: Set the correct entry size for the .stab section.  */
 714
 715 static bfd_boolean
 716 elf64_sparc_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
 717                            Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED,
 718                            asection *sec)
 719 {
 720   const char *name;
 721
 722   name = bfd_get_section_name (abfd, sec);
 723
 724   if (strcmp (name, ".stab") == 0)
 725     {
 726       /* Even in the 64bit case the stab entries are only 12 bytes long.  */
 727       elf_section_data (sec)->this_hdr.sh_entsize = 12;
 728     }
 729
 730   return TRUE;
 731 }
 732 \f
 733 /* Print a STT_REGISTER symbol to file FILE.  */
 734
 735 static const char *
 736 elf64_sparc_print_symbol_all (bfd *abfd ATTRIBUTE_UNUSED, PTR filep,
 737                               asymbol *symbol)
 738 {
 739   FILE *file = (FILE *) filep;
 740   int reg, type;
 741
 742   if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info)
 743       != STT_REGISTER)
 744     return NULL;
 745
 746   reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
 747   type = symbol->flags;
 748   fprintf (file, "REG_%c%c%11s%c%c    R", "GOLI" [reg / 8], '0' + (reg & 7), "",
 749                  ((type & BSF_LOCAL)
 750                   ? (type & BSF_GLOBAL) ? '!' : 'l'
 751                   : (type & BSF_GLOBAL) ? 'g' : ' '),
 752                  (type & BSF_WEAK) ? 'w' : ' ');
 753   if (symbol->name == NULL || symbol->name [0] == '\0')
 754     return "#scratch";
 755   else
 756     return symbol->name;
 757 }
 758 \f
 759 static enum elf_reloc_type_class
 760 elf64_sparc_reloc_type_class (const Elf_Internal_Rela *rela)
 761 {
 762   switch ((int) ELF64_R_TYPE (rela->r_info))
 763     {
 764     case R_SPARC_RELATIVE:
 765       return reloc_class_relative;
 766     case R_SPARC_JMP_SLOT:
 767       return reloc_class_plt;
 768     case R_SPARC_COPY:
 769       return reloc_class_copy;
 770     default:
 771       return reloc_class_normal;
 772     }
 773 }
 774
 775 /* Relocations in the 64 bit SPARC ELF ABI are more complex than in
 776    standard ELF, because R_SPARC_OLO10 has secondary addend in
 777    ELF64_R_TYPE_DATA field.  This structure is used to redirect the
 778    relocation handling routines.  */
 779
 780 const struct elf_size_info elf64_sparc_size_info =
 781 {
 782   sizeof (Elf64_External_Ehdr),
 783   sizeof (Elf64_External_Phdr),
 784   sizeof (Elf64_External_Shdr),
 785   sizeof (Elf64_External_Rel),
 786   sizeof (Elf64_External_Rela),
 787   sizeof (Elf64_External_Sym),
 788   sizeof (Elf64_External_Dyn),
 789   sizeof (Elf_External_Note),
 790   4,            /* hash-table entry size.  */
 791   /* Internal relocations per external relocations.
 792      For link purposes we use just 1 internal per
 793      1 external, for assembly and slurp symbol table
 794      we use 2.  */
 795   1,
 796   64,           /* arch_size.  */
 797   3,            /* log_file_align.  */
 798   ELFCLASS64,
 799   EV_CURRENT,
 800   bfd_elf64_write_out_phdrs,
 801   bfd_elf64_write_shdrs_and_ehdr,
 802   bfd_elf64_checksum_contents,
 803   elf64_sparc_write_relocs,
 804   bfd_elf64_swap_symbol_in,
 805   bfd_elf64_swap_symbol_out,
 806   elf64_sparc_slurp_reloc_table,
 807   bfd_elf64_slurp_symbol_table,
 808   bfd_elf64_swap_dyn_in,
 809   bfd_elf64_swap_dyn_out,
 810   bfd_elf64_swap_reloc_in,
 811   bfd_elf64_swap_reloc_out,
 812   bfd_elf64_swap_reloca_in,
 813   bfd_elf64_swap_reloca_out
 814 };
 815
 816 #define TARGET_BIG_SYM  bfd_elf64_sparc_vec
 817 #define TARGET_BIG_NAME "elf64-sparc"
 818 #define ELF_ARCH        bfd_arch_sparc
 819 #define ELF_MAXPAGESIZE 0x100000
 820 #define ELF_COMMONPAGESIZE 0x2000
 821
 822 /* This is the official ABI value.  */
 823 #define ELF_MACHINE_CODE EM_SPARCV9
 824
 825 /* This is the value that we used before the ABI was released.  */
 826 #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9
 827
 828 #define elf_backend_reloc_type_class \
 829   elf64_sparc_reloc_type_class
 830 #define bfd_elf64_get_reloc_upper_bound \
 831   elf64_sparc_get_reloc_upper_bound
 832 #define bfd_elf64_get_dynamic_reloc_upper_bound \
 833   elf64_sparc_get_dynamic_reloc_upper_bound
 834 #define bfd_elf64_canonicalize_reloc \
 835   elf64_sparc_canonicalize_reloc
 836 #define bfd_elf64_canonicalize_dynamic_reloc \
 837   elf64_sparc_canonicalize_dynamic_reloc
 838 #define elf_backend_add_symbol_hook \
 839   elf64_sparc_add_symbol_hook
 840 #define elf_backend_get_symbol_type \
 841   elf64_sparc_get_symbol_type
 842 #define elf_backend_symbol_processing \
 843   elf64_sparc_symbol_processing
 844 #define elf_backend_print_symbol_all \
 845   elf64_sparc_print_symbol_all
 846 #define elf_backend_output_arch_syms \
 847   elf64_sparc_output_arch_syms
 848 #define bfd_elf64_bfd_merge_private_bfd_data \
 849   elf64_sparc_merge_private_bfd_data
 850 #define elf_backend_fake_sections \
 851   elf64_sparc_fake_sections
 852 #define elf_backend_size_info \
 853   elf64_sparc_size_info
 854
 855 #define elf_backend_plt_sym_val \
 856   _bfd_sparc_elf_plt_sym_val
 857 #define bfd_elf64_bfd_link_hash_table_create \
 858   _bfd_sparc_elf_link_hash_table_create
 859 #define elf_info_to_howto \
 860   _bfd_sparc_elf_info_to_howto
 861 #define elf_backend_copy_indirect_symbol \
 862   _bfd_sparc_elf_copy_indirect_symbol
 863 #define bfd_elf64_bfd_reloc_type_lookup \
 864   _bfd_sparc_elf_reloc_type_lookup
 865 #define bfd_elf64_bfd_reloc_name_lookup \
 866   _bfd_sparc_elf_reloc_name_lookup
 867 #define bfd_elf64_bfd_relax_section \
 868   _bfd_sparc_elf_relax_section
 869 #define bfd_elf64_new_section_hook \
 870   _bfd_sparc_elf_new_section_hook
 871
 872 #define elf_backend_create_dynamic_sections \
 873   _bfd_sparc_elf_create_dynamic_sections
 874 #define elf_backend_relocs_compatible \
 875   _bfd_elf_relocs_compatible
 876 #define elf_backend_check_relocs \
 877   _bfd_sparc_elf_check_relocs
 878 #define elf_backend_adjust_dynamic_symbol \
 879   _bfd_sparc_elf_adjust_dynamic_symbol
 880 #define elf_backend_omit_section_dynsym \
 881   _bfd_sparc_elf_omit_section_dynsym
 882 #define elf_backend_size_dynamic_sections \
 883   _bfd_sparc_elf_size_dynamic_sections
 884 #define elf_backend_relocate_section \
 885   _bfd_sparc_elf_relocate_section
 886 #define elf_backend_finish_dynamic_symbol \
 887   _bfd_sparc_elf_finish_dynamic_symbol
 888 #define elf_backend_finish_dynamic_sections \
 889   _bfd_sparc_elf_finish_dynamic_sections
 890
 891 #define bfd_elf64_mkobject \
 892   _bfd_sparc_elf_mkobject
 893 #define elf_backend_object_p \
 894   _bfd_sparc_elf_object_p
 895 #define elf_backend_gc_mark_hook \
 896   _bfd_sparc_elf_gc_mark_hook
 897 #define elf_backend_gc_sweep_hook \
 898   _bfd_sparc_elf_gc_sweep_hook
 899 #define elf_backend_init_index_section \
 900   _bfd_elf_init_1_index_section
 901
 902 #define elf_backend_can_gc_sections 1
 903 #define elf_backend_can_refcount 1
 904 #define elf_backend_want_got_plt 0
 905 #define elf_backend_plt_readonly 0
 906 #define elf_backend_want_plt_sym 1
 907 #define elf_backend_got_header_size 8
 908 #define elf_backend_rela_normal 1
 909
 910 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table.  */
 911 #define elf_backend_plt_alignment 8
 912
 913 #include "elf64-target.h"
 914
 915 /* FreeBSD support */
 916 #undef  TARGET_BIG_SYM
 917 #define TARGET_BIG_SYM bfd_elf64_sparc_freebsd_vec
 918 #undef  TARGET_BIG_NAME
 919 #define TARGET_BIG_NAME "elf64-sparc-freebsd"
 920 #undef  ELF_OSABI
 921 #define ELF_OSABI ELFOSABI_FREEBSD
 922
 923 #undef  elf_backend_post_process_headers
 924 #define elf_backend_post_process_headers        _bfd_elf_set_osabi
 925 #undef  elf64_bed
 926 #define elf64_bed                               elf64_sparc_fbsd_bed
 927
 928 #include "elf64-target.h"
 929