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) == 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_GNU_IFUNC)
 428     elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
 429
 430   if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER)
 431     {
 432       int reg;
 433       struct _bfd_sparc_elf_app_reg *p;
 434
 435       reg = (int)sym->st_value;
 436       switch (reg & ~1)
 437         {
 438         case 2: reg -= 2; break;
 439         case 6: reg -= 4; break;
 440         default:
 441           (*_bfd_error_handler)
 442             (_("%B: Only registers %%g[2367] can be declared using STT_REGISTER"),
 443              abfd);
 444           return FALSE;
 445         }
 446
 447       if (info->output_bfd->xvec != abfd->xvec
 448           || (abfd->flags & DYNAMIC) != 0)
 449         {
 450           /* STT_REGISTER only works when linking an elf64_sparc object.
 451              If STT_REGISTER comes from a dynamic object, don't put it into
 452              the output bfd.  The dynamic linker will recheck it.  */
 453           *namep = NULL;
 454           return TRUE;
 455         }
 456
 457       p = _bfd_sparc_elf_hash_table(info)->app_regs + reg;
 458
 459       if (p->name != NULL && strcmp (p->name, *namep))
 460         {
 461           (*_bfd_error_handler)
 462             (_("Register %%g%d used incompatibly: %s in %B, previously %s in %B"),
 463              abfd, p->abfd, (int) sym->st_value,
 464              **namep ? *namep : "#scratch",
 465              *p->name ? p->name : "#scratch");
 466           return FALSE;
 467         }
 468
 469       if (p->name == NULL)
 470         {
 471           if (**namep)
 472             {
 473               struct elf_link_hash_entry *h;
 474
 475               h = (struct elf_link_hash_entry *)
 476                 bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE);
 477
 478               if (h != NULL)
 479                 {
 480                   unsigned char type = h->type;
 481
 482                   if (type > STT_FUNC)
 483                     type = 0;
 484                   (*_bfd_error_handler)
 485                     (_("Symbol `%s' has differing types: REGISTER in %B, previously %s in %B"),
 486                      abfd, p->abfd, *namep, stt_types[type]);
 487                   return FALSE;
 488                 }
 489
 490               p->name = bfd_hash_allocate (&info->hash->table,
 491                                            strlen (*namep) + 1);
 492               if (!p->name)
 493                 return FALSE;
 494
 495               strcpy (p->name, *namep);
 496             }
 497           else
 498             p->name = "";
 499           p->bind = ELF_ST_BIND (sym->st_info);
 500           p->abfd = abfd;
 501           p->shndx = sym->st_shndx;
 502         }
 503       else
 504         {
 505           if (p->bind == STB_WEAK
 506               && ELF_ST_BIND (sym->st_info) == STB_GLOBAL)
 507             {
 508               p->bind = STB_GLOBAL;
 509               p->abfd = abfd;
 510             }
 511         }
 512       *namep = NULL;
 513       return TRUE;
 514     }
 515   else if (*namep && **namep
 516            && info->output_bfd->xvec == abfd->xvec)
 517     {
 518       int i;
 519       struct _bfd_sparc_elf_app_reg *p;
 520
 521       p = _bfd_sparc_elf_hash_table(info)->app_regs;
 522       for (i = 0; i < 4; i++, p++)
 523         if (p->name != NULL && ! strcmp (p->name, *namep))
 524           {
 525             unsigned char type = ELF_ST_TYPE (sym->st_info);
 526
 527             if (type > STT_FUNC)
 528               type = 0;
 529             (*_bfd_error_handler)
 530               (_("Symbol `%s' has differing types: %s in %B, previously REGISTER in %B"),
 531                abfd, p->abfd, *namep, stt_types[type]);
 532             return FALSE;
 533           }
 534     }
 535   return TRUE;
 536 }
 537
 538 /* This function takes care of emitting STT_REGISTER symbols
 539    which we cannot easily keep in the symbol hash table.  */
 540
 541 static bfd_boolean
 542 elf64_sparc_output_arch_syms (bfd *output_bfd ATTRIBUTE_UNUSED,
 543                               struct bfd_link_info *info,
 544                               PTR finfo,
 545                               int (*func) (PTR, const char *,
 546                                            Elf_Internal_Sym *,
 547                                            asection *,
 548                                            struct elf_link_hash_entry *))
 549 {
 550   int reg;
 551   struct _bfd_sparc_elf_app_reg *app_regs =
 552     _bfd_sparc_elf_hash_table(info)->app_regs;
 553   Elf_Internal_Sym sym;
 554
 555   /* We arranged in size_dynamic_sections to put the STT_REGISTER entries
 556      at the end of the dynlocal list, so they came at the end of the local
 557      symbols in the symtab.  Except that they aren't STB_LOCAL, so we need
 558      to back up symtab->sh_info.  */
 559   if (elf_hash_table (info)->dynlocal)
 560     {
 561       bfd * dynobj = elf_hash_table (info)->dynobj;
 562       asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym");
 563       struct elf_link_local_dynamic_entry *e;
 564
 565       for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
 566         if (e->input_indx == -1)
 567           break;
 568       if (e)
 569         {
 570           elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
 571             = e->dynindx;
 572         }
 573     }
 574
 575   if (info->strip == strip_all)
 576     return TRUE;
 577
 578   for (reg = 0; reg < 4; reg++)
 579     if (app_regs [reg].name != NULL)
 580       {
 581         if (info->strip == strip_some
 582             && bfd_hash_lookup (info->keep_hash,
 583                                 app_regs [reg].name,
 584                                 FALSE, FALSE) == NULL)
 585           continue;
 586
 587         sym.st_value = reg < 2 ? reg + 2 : reg + 4;
 588         sym.st_size = 0;
 589         sym.st_other = 0;
 590         sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER);
 591         sym.st_shndx = app_regs [reg].shndx;
 592         if ((*func) (finfo, app_regs [reg].name, &sym,
 593                      sym.st_shndx == SHN_ABS
 594                      ? bfd_abs_section_ptr : bfd_und_section_ptr,
 595                      NULL) != 1)
 596           return FALSE;
 597       }
 598
 599   return TRUE;
 600 }
 601
 602 static int
 603 elf64_sparc_get_symbol_type (Elf_Internal_Sym *elf_sym, int type)
 604 {
 605   if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER)
 606     return STT_REGISTER;
 607   else
 608     return type;
 609 }
 610
 611 /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL
 612    even in SHN_UNDEF section.  */
 613
 614 static void
 615 elf64_sparc_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym)
 616 {
 617   elf_symbol_type *elfsym;
 618
 619   elfsym = (elf_symbol_type *) asym;
 620   if (elfsym->internal_elf_sym.st_info
 621       == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER))
 622     {
 623       asym->flags |= BSF_GLOBAL;
 624     }
 625 }
 626
 627 \f
 628 /* Functions for dealing with the e_flags field.  */
 629
 630 /* Merge backend specific data from an object file to the output
 631    object file when linking.  */
 632
 633 static bfd_boolean
 634 elf64_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
 635 {
 636   bfd_boolean error;
 637   flagword new_flags, old_flags;
 638   int new_mm, old_mm;
 639
 640   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
 641       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
 642     return TRUE;
 643
 644   new_flags = elf_elfheader (ibfd)->e_flags;
 645   old_flags = elf_elfheader (obfd)->e_flags;
 646
 647   if (!elf_flags_init (obfd))   /* First call, no flags set */
 648     {
 649       elf_flags_init (obfd) = TRUE;
 650       elf_elfheader (obfd)->e_flags = new_flags;
 651     }
 652
 653   else if (new_flags == old_flags)      /* Compatible flags are ok */
 654     ;
 655
 656   else                                  /* Incompatible flags */
 657     {
 658       error = FALSE;
 659
 660 #define EF_SPARC_ISA_EXTENSIONS \
 661   (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1)
 662
 663       if ((ibfd->flags & DYNAMIC) != 0)
 664         {
 665           /* We don't want dynamic objects memory ordering and
 666              architecture to have any role. That's what dynamic linker
 667              should do.  */
 668           new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS);
 669           new_flags |= (old_flags
 670                         & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS));
 671         }
 672       else
 673         {
 674           /* Choose the highest architecture requirements.  */
 675           old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS);
 676           new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS);
 677           if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3))
 678               && (old_flags & EF_SPARC_HAL_R1))
 679             {
 680               error = TRUE;
 681               (*_bfd_error_handler)
 682                 (_("%B: linking UltraSPARC specific with HAL specific code"),
 683                  ibfd);
 684             }
 685           /* Choose the most restrictive memory ordering.  */
 686           old_mm = (old_flags & EF_SPARCV9_MM);
 687           new_mm = (new_flags & EF_SPARCV9_MM);
 688           old_flags &= ~EF_SPARCV9_MM;
 689           new_flags &= ~EF_SPARCV9_MM;
 690           if (new_mm < old_mm)
 691             old_mm = new_mm;
 692           old_flags |= old_mm;
 693           new_flags |= old_mm;
 694         }
 695
 696       /* Warn about any other mismatches */
 697       if (new_flags != old_flags)
 698         {
 699           error = TRUE;
 700           (*_bfd_error_handler)
 701             (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
 702              ibfd, (long) new_flags, (long) old_flags);
 703         }
 704
 705       elf_elfheader (obfd)->e_flags = old_flags;
 706
 707       if (error)
 708         {
 709           bfd_set_error (bfd_error_bad_value);
 710           return FALSE;
 711         }
 712     }
 713   return TRUE;
 714 }
 715
 716 /* MARCO: Set the correct entry size for the .stab section.  */
 717
 718 static bfd_boolean
 719 elf64_sparc_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
 720                            Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED,
 721                            asection *sec)
 722 {
 723   const char *name;
 724
 725   name = bfd_get_section_name (abfd, sec);
 726
 727   if (strcmp (name, ".stab") == 0)
 728     {
 729       /* Even in the 64bit case the stab entries are only 12 bytes long.  */
 730       elf_section_data (sec)->this_hdr.sh_entsize = 12;
 731     }
 732
 733   return TRUE;
 734 }
 735 \f
 736 /* Print a STT_REGISTER symbol to file FILE.  */
 737
 738 static const char *
 739 elf64_sparc_print_symbol_all (bfd *abfd ATTRIBUTE_UNUSED, PTR filep,
 740                               asymbol *symbol)
 741 {
 742   FILE *file = (FILE *) filep;
 743   int reg, type;
 744
 745   if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info)
 746       != STT_REGISTER)
 747     return NULL;
 748
 749   reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
 750   type = symbol->flags;
 751   fprintf (file, "REG_%c%c%11s%c%c    R", "GOLI" [reg / 8], '0' + (reg & 7), "",
 752                  ((type & BSF_LOCAL)
 753                   ? (type & BSF_GLOBAL) ? '!' : 'l'
 754                   : (type & BSF_GLOBAL) ? 'g' : ' '),
 755                  (type & BSF_WEAK) ? 'w' : ' ');
 756   if (symbol->name == NULL || symbol->name [0] == '\0')
 757     return "#scratch";
 758   else
 759     return symbol->name;
 760 }
 761 \f
 762 static enum elf_reloc_type_class
 763 elf64_sparc_reloc_type_class (const Elf_Internal_Rela *rela)
 764 {
 765   switch ((int) ELF64_R_TYPE (rela->r_info))
 766     {
 767     case R_SPARC_RELATIVE:
 768       return reloc_class_relative;
 769     case R_SPARC_JMP_SLOT:
 770       return reloc_class_plt;
 771     case R_SPARC_COPY:
 772       return reloc_class_copy;
 773     default:
 774       return reloc_class_normal;
 775     }
 776 }
 777
 778 /* Relocations in the 64 bit SPARC ELF ABI are more complex than in
 779    standard ELF, because R_SPARC_OLO10 has secondary addend in
 780    ELF64_R_TYPE_DATA field.  This structure is used to redirect the
 781    relocation handling routines.  */
 782
 783 const struct elf_size_info elf64_sparc_size_info =
 784 {
 785   sizeof (Elf64_External_Ehdr),
 786   sizeof (Elf64_External_Phdr),
 787   sizeof (Elf64_External_Shdr),
 788   sizeof (Elf64_External_Rel),
 789   sizeof (Elf64_External_Rela),
 790   sizeof (Elf64_External_Sym),
 791   sizeof (Elf64_External_Dyn),
 792   sizeof (Elf_External_Note),
 793   4,            /* hash-table entry size.  */
 794   /* Internal relocations per external relocations.
 795      For link purposes we use just 1 internal per
 796      1 external, for assembly and slurp symbol table
 797      we use 2.  */
 798   1,
 799   64,           /* arch_size.  */
 800   3,            /* log_file_align.  */
 801   ELFCLASS64,
 802   EV_CURRENT,
 803   bfd_elf64_write_out_phdrs,
 804   bfd_elf64_write_shdrs_and_ehdr,
 805   bfd_elf64_checksum_contents,
 806   elf64_sparc_write_relocs,
 807   bfd_elf64_swap_symbol_in,
 808   bfd_elf64_swap_symbol_out,
 809   elf64_sparc_slurp_reloc_table,
 810   bfd_elf64_slurp_symbol_table,
 811   bfd_elf64_swap_dyn_in,
 812   bfd_elf64_swap_dyn_out,
 813   bfd_elf64_swap_reloc_in,
 814   bfd_elf64_swap_reloc_out,
 815   bfd_elf64_swap_reloca_in,
 816   bfd_elf64_swap_reloca_out
 817 };
 818
 819 #define TARGET_BIG_SYM  bfd_elf64_sparc_vec
 820 #define TARGET_BIG_NAME "elf64-sparc"
 821 #define ELF_ARCH        bfd_arch_sparc
 822 #define ELF_MAXPAGESIZE 0x100000
 823 #define ELF_COMMONPAGESIZE 0x2000
 824
 825 /* This is the official ABI value.  */
 826 #define ELF_MACHINE_CODE EM_SPARCV9
 827
 828 /* This is the value that we used before the ABI was released.  */
 829 #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9
 830
 831 #define elf_backend_reloc_type_class \
 832   elf64_sparc_reloc_type_class
 833 #define bfd_elf64_get_reloc_upper_bound \
 834   elf64_sparc_get_reloc_upper_bound
 835 #define bfd_elf64_get_dynamic_reloc_upper_bound \
 836   elf64_sparc_get_dynamic_reloc_upper_bound
 837 #define bfd_elf64_canonicalize_reloc \
 838   elf64_sparc_canonicalize_reloc
 839 #define bfd_elf64_canonicalize_dynamic_reloc \
 840   elf64_sparc_canonicalize_dynamic_reloc
 841 #define elf_backend_add_symbol_hook \
 842   elf64_sparc_add_symbol_hook
 843 #define elf_backend_get_symbol_type \
 844   elf64_sparc_get_symbol_type
 845 #define elf_backend_symbol_processing \
 846   elf64_sparc_symbol_processing
 847 #define elf_backend_print_symbol_all \
 848   elf64_sparc_print_symbol_all
 849 #define elf_backend_output_arch_syms \
 850   elf64_sparc_output_arch_syms
 851 #define bfd_elf64_bfd_merge_private_bfd_data \
 852   elf64_sparc_merge_private_bfd_data
 853 #define elf_backend_fake_sections \
 854   elf64_sparc_fake_sections
 855 #define elf_backend_size_info \
 856   elf64_sparc_size_info
 857
 858 #define elf_backend_plt_sym_val \
 859   _bfd_sparc_elf_plt_sym_val
 860 #define bfd_elf64_bfd_link_hash_table_create \
 861   _bfd_sparc_elf_link_hash_table_create
 862 #define bfd_elf64_bfd_link_hash_table_free \
 863   _bfd_sparc_elf_link_hash_table_free
 864 #define elf_info_to_howto \
 865   _bfd_sparc_elf_info_to_howto
 866 #define elf_backend_copy_indirect_symbol \
 867   _bfd_sparc_elf_copy_indirect_symbol
 868 #define bfd_elf64_bfd_reloc_type_lookup \
 869   _bfd_sparc_elf_reloc_type_lookup
 870 #define bfd_elf64_bfd_reloc_name_lookup \
 871   _bfd_sparc_elf_reloc_name_lookup
 872 #define bfd_elf64_bfd_relax_section \
 873   _bfd_sparc_elf_relax_section
 874 #define bfd_elf64_new_section_hook \
 875   _bfd_sparc_elf_new_section_hook
 876
 877 #define elf_backend_create_dynamic_sections \
 878   _bfd_sparc_elf_create_dynamic_sections
 879 #define elf_backend_relocs_compatible \
 880   _bfd_elf_relocs_compatible
 881 #define elf_backend_check_relocs \
 882   _bfd_sparc_elf_check_relocs
 883 #define elf_backend_adjust_dynamic_symbol \
 884   _bfd_sparc_elf_adjust_dynamic_symbol
 885 #define elf_backend_omit_section_dynsym \
 886   _bfd_sparc_elf_omit_section_dynsym
 887 #define elf_backend_size_dynamic_sections \
 888   _bfd_sparc_elf_size_dynamic_sections
 889 #define elf_backend_relocate_section \
 890   _bfd_sparc_elf_relocate_section
 891 #define elf_backend_finish_dynamic_symbol \
 892   _bfd_sparc_elf_finish_dynamic_symbol
 893 #define elf_backend_finish_dynamic_sections \
 894   _bfd_sparc_elf_finish_dynamic_sections
 895
 896 #define bfd_elf64_mkobject \
 897   _bfd_sparc_elf_mkobject
 898 #define elf_backend_object_p \
 899   _bfd_sparc_elf_object_p
 900 #define elf_backend_gc_mark_hook \
 901   _bfd_sparc_elf_gc_mark_hook
 902 #define elf_backend_gc_sweep_hook \
 903   _bfd_sparc_elf_gc_sweep_hook
 904 #define elf_backend_init_index_section \
 905   _bfd_elf_init_1_index_section
 906
 907 #define elf_backend_can_gc_sections 1
 908 #define elf_backend_can_refcount 1
 909 #define elf_backend_want_got_plt 0
 910 #define elf_backend_plt_readonly 0
 911 #define elf_backend_want_plt_sym 1
 912 #define elf_backend_got_header_size 8
 913 #define elf_backend_rela_normal 1
 914
 915 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table.  */
 916 #define elf_backend_plt_alignment 8
 917
 918 #define elf_backend_post_process_headers        _bfd_elf_set_osabi
 919
 920 #include "elf64-target.h"
 921
 922 /* FreeBSD support */
 923 #undef  TARGET_BIG_SYM
 924 #define TARGET_BIG_SYM bfd_elf64_sparc_freebsd_vec
 925 #undef  TARGET_BIG_NAME
 926 #define TARGET_BIG_NAME "elf64-sparc-freebsd"
 927 #undef  ELF_OSABI
 928 #define ELF_OSABI ELFOSABI_FREEBSD
 929
 930 #undef  elf64_bed
 931 #define elf64_bed                               elf64_sparc_fbsd_bed
 932
 933 #include "elf64-target.h"
 934