bfd/elf32-epiphany.c

   1 /* Adapteva epiphany specific support for 32-bit ELF
   2    Copyright (C) 2000-2018 Free Software Foundation, Inc.
   3    Contributed by Embecosm on behalf of Adapteva, 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/epiphany.h"
  27 #include "libiberty.h"
  28
  29 /* Struct used to pass miscellaneous paramaters which
  30    helps to avoid overly long parameter lists.  */
  31 struct misc
  32 {
  33   Elf_Internal_Shdr *  symtab_hdr;
  34   Elf_Internal_Rela *  irelbase;
  35   bfd_byte *           contents;
  36   Elf_Internal_Sym *   isymbuf;
  37 };
  38
  39 struct epiphany_opcode
  40 {
  41   unsigned short opcode;
  42   unsigned short mask;
  43 };
  44
  45 static bfd_boolean epiphany_relaxed = FALSE;
  46
  47 /* Relocation tables.  */
  48 static reloc_howto_type epiphany_elf_howto_table [] =
  49 {
  50 #define AHOW(t,rs,s,bs,pr,bp,co,name,sm,dm)     \
  51     HOWTO(t,                    /* type */ \
  52           rs,                   /* rightshift */ \
  53           s,                    /* size (0 = byte, 1 = short, 2 = long) */ \
  54           bs,                   /* bitsize */ \
  55           pr,                   /* pc_relative */ \
  56           bp,                   /* bitpos */ \
  57           co,                   /* complain_on_overflow */             \
  58           bfd_elf_generic_reloc,/* special_function */ \
  59           name,                 /* name */ \
  60           FALSE,                /* partial_inplace */ \
  61           sm,                   /* src_mask */ \
  62           dm,                   /* dst_mask */ \
  63           pr)                   /* pcrel_offset */
  64
  65   /* This reloc does nothing.  */
  66   AHOW (R_EPIPHANY_NONE,    0, 3,0, FALSE, 0, complain_overflow_dont,     "R_EPIPHANY_NONE",        0,          0),
  67
  68   /* 8 bit absolute (not likely) */
  69   AHOW (R_EPIPHANY_8,       0, 0, 8, FALSE, 0, complain_overflow_bitfield, "R_EPIPHANY_8",      0x000000ff, 0x000000ff),
  70   /* 16 bit absolute */
  71   AHOW (R_EPIPHANY_16,      0, 1,16, FALSE, 0, complain_overflow_bitfield, "R_EPIPHANY_16",     0x0000ffff, 0x00ff1fe0),
  72   /* A 32 bit absolute relocation.  */
  73   AHOW (R_EPIPHANY_32,      0, 2,32, FALSE, 0, complain_overflow_dont,     "R_EPIPHANY_32",     0xffffffff, 0xffffffff),
  74
  75   /*  8 bit relative relocation */
  76   HOWTO ( R_EPIPHANY_8_PCREL,  0, 0,  8, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_EPIPHANY_8_PCREL", FALSE, 0x000000ff, 0x000000ff, FALSE),
  77   /* 16 bit relative relocation */
  78   HOWTO ( R_EPIPHANY_16_PCREL, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_EPIPHANY_8_PCREL", FALSE, 0x000000ff, 0x000000ff, FALSE),
  79   /* 32 bit relative relocation */
  80   HOWTO ( R_EPIPHANY_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_EPIPHANY_8_PCREL", FALSE, 0x000000ff, 0x000000ff, FALSE),
  81
  82   /* 8 bit pc-relative relocation */
  83   AHOW (R_EPIPHANY_SIMM8,   1, 0, 8,  TRUE, 8, complain_overflow_signed,   "R_EPIPHANY_SIMM8",   0x000000ff, 0x0000ff00),
  84   /* 24 bit pc-relative relocation */
  85   AHOW (R_EPIPHANY_SIMM24,  1, 2,24,  TRUE, 8, complain_overflow_signed,   "R_EPIPHANY_SIMM24",  0x00ffffff, 0xffffff00),
  86
  87   /* %HIGH(EA) */
  88   AHOW (R_EPIPHANY_HIGH,    0, 2,16, FALSE, 0, complain_overflow_dont,     "R_EPIPHANY_HIGH",    0x0ff01fe0, 0x0ff01fe0),
  89
  90   /* %LOW(EA) */
  91   AHOW (R_EPIPHANY_LOW,     0, 2,16, FALSE, 0, complain_overflow_dont,  "R_EPIPHANY_LOW",     0x0ff01fe0, 0x0ff01fe0),
  92
  93   /* simm11 */
  94   AHOW (R_EPIPHANY_SIMM11,  0, 2,11, FALSE, 0, complain_overflow_bitfield, "R_EPIPHANY_SIMM11",  0x00ff0380, 0x00ff0380),
  95   /* imm12 - sign-magnitude */
  96   AHOW (R_EPIPHANY_IMM11,   0, 2,11, FALSE, 0, complain_overflow_bitfield, "R_EPIPHANY_IMM12",   0x00ff0380, 0x00ff0380),
  97   /* imm8 */
  98   AHOW (R_EPIPHANY_IMM8,    0, 1, 8, FALSE, 8, complain_overflow_signed,   "R_EPIPHANY_IMM8",    0x0000ff00, 0x0000ff00)
  99
 100
 101 };
 102 #undef AHOW
 103
 104 /* Map BFD reloc types to EPIPHANY ELF reloc types.  */
 105
 106 static reloc_howto_type *
 107 epiphany_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
 108                             bfd_reloc_code_real_type code)
 109 {
 110   /* Note that the epiphany_elf_howto_table is indxed by the R_
 111      constants.  Thus, the order that the howto records appear in the
 112      table *must* match the order of the relocation types defined in
 113      include/elf/epiphany.h.  */
 114
 115   switch (code)
 116     {
 117     case BFD_RELOC_NONE:
 118       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_NONE];
 119
 120     case BFD_RELOC_EPIPHANY_SIMM8:
 121       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_SIMM8];
 122     case BFD_RELOC_EPIPHANY_SIMM24:
 123       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_SIMM24];
 124
 125     case BFD_RELOC_8_PCREL:
 126       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_8_PCREL];
 127     case BFD_RELOC_16_PCREL:
 128       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_16_PCREL];
 129     case BFD_RELOC_32_PCREL:
 130       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_32_PCREL];
 131
 132     case BFD_RELOC_8:
 133       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_8];
 134     case BFD_RELOC_16:
 135       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_16];
 136     case BFD_RELOC_32:
 137       return &epiphany_elf_howto_table[ (int) R_EPIPHANY_32];
 138
 139     case BFD_RELOC_EPIPHANY_HIGH:
 140       return & epiphany_elf_howto_table[ (int) R_EPIPHANY_HIGH];
 141     case BFD_RELOC_EPIPHANY_LOW:
 142       return & epiphany_elf_howto_table[ (int) R_EPIPHANY_LOW];
 143
 144     case BFD_RELOC_EPIPHANY_SIMM11:
 145       return & epiphany_elf_howto_table[ (int) R_EPIPHANY_SIMM11];
 146     case BFD_RELOC_EPIPHANY_IMM11:
 147       return & epiphany_elf_howto_table[ (int) R_EPIPHANY_IMM11];
 148
 149     case BFD_RELOC_EPIPHANY_IMM8:
 150       return & epiphany_elf_howto_table[ (int) R_EPIPHANY_IMM8];
 151
 152     default:
 153       /* Pacify gcc -Wall.  */
 154       return NULL;
 155     }
 156   return NULL;
 157 }
 158
 159 static reloc_howto_type *
 160 epiphany_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
 161 {
 162   unsigned int i;
 163
 164   for (i = 0; i < ARRAY_SIZE (epiphany_elf_howto_table); i++)
 165     if (epiphany_elf_howto_table[i].name != NULL
 166         && strcasecmp (epiphany_elf_howto_table[i].name, r_name) == 0)
 167       return &epiphany_elf_howto_table[i];
 168
 169   return NULL;
 170 }
 171
 172 #define PAGENO(ABSADDR) ((ABSADDR) & 0xFFFFC000)
 173 #define BASEADDR(SEC)   ((SEC)->output_section->vma + (SEC)->output_offset)
 174
 175 /* This function handles relaxing for the epiphany.
 176    Dummy placeholder for future optimizations.  */
 177
 178 static bfd_boolean
 179 epiphany_elf_relax_section (bfd *abfd, asection *sec,
 180                             struct bfd_link_info *link_info,
 181                             bfd_boolean *again)
 182 {
 183   Elf_Internal_Shdr *symtab_hdr;
 184   Elf_Internal_Rela *internal_relocs;
 185   bfd_byte *contents = NULL;
 186   Elf_Internal_Sym *isymbuf = NULL;
 187   static asection * first_section = NULL;
 188   static unsigned long search_addr;
 189   static unsigned long page_start = 0;
 190   static unsigned long page_end = 0;
 191   static unsigned int pass = 0;
 192   static bfd_boolean new_pass = FALSE;
 193   static bfd_boolean changed = FALSE;
 194   struct misc misc ATTRIBUTE_UNUSED;
 195   asection *stab;
 196
 197   /* Assume nothing changes.  */
 198   *again = FALSE;
 199
 200   if (first_section == NULL)
 201     {
 202       epiphany_relaxed = TRUE;
 203       first_section = sec;
 204     }
 205
 206   if (first_section == sec)
 207     {
 208       pass++;
 209       new_pass = TRUE;
 210     }
 211
 212   /* We don't have to do anything for a relocatable link,
 213      if this section does not have relocs, or if this is
 214      not a code section.  */
 215   if (bfd_link_relocatable (link_info)
 216       || (sec->flags & SEC_RELOC) == 0
 217       || sec->reloc_count == 0
 218       || (sec->flags & SEC_CODE) == 0)
 219     return TRUE;
 220
 221   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
 222
 223   internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
 224                                                link_info->keep_memory);
 225   if (internal_relocs == NULL)
 226     goto error_return;
 227
 228   /* Make sure the stac.rela stuff gets read in.  */
 229   stab = bfd_get_section_by_name (abfd, ".stab");
 230
 231   if (stab)
 232     {
 233       /* So stab does exits.  */
 234       Elf_Internal_Rela * irelbase ATTRIBUTE_UNUSED;
 235
 236       irelbase = _bfd_elf_link_read_relocs (abfd, stab, NULL, NULL,
 237                                             link_info->keep_memory);
 238     }
 239
 240   /* Get section contents cached copy if it exists.  */
 241   if (contents == NULL)
 242     {
 243       /* Get cached copy if it exists.  */
 244       if (elf_section_data (sec)->this_hdr.contents != NULL)
 245         contents = elf_section_data (sec)->this_hdr.contents;
 246       else
 247         {
 248           /* Go get them off disk.  */
 249           if (!bfd_malloc_and_get_section (abfd, sec, &contents))
 250             goto error_return;
 251         }
 252     }
 253
 254   /* Read this BFD's symbols cached copy if it exists.  */
 255   if (isymbuf == NULL && symtab_hdr->sh_info != 0)
 256     {
 257       isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
 258       if (isymbuf == NULL)
 259         isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
 260                                         symtab_hdr->sh_info, 0,
 261                                         NULL, NULL, NULL);
 262       if (isymbuf == NULL)
 263         goto error_return;
 264     }
 265
 266   misc.symtab_hdr = symtab_hdr;
 267   misc.isymbuf = isymbuf;
 268   misc.irelbase = internal_relocs;
 269   misc.contents = contents;
 270
 271   /* This is where all the relaxation actually get done.  */
 272   if ((pass == 1) || (new_pass && !changed))
 273     {
 274       /* On the first pass we simply search for the lowest page that
 275          we havn't relaxed yet. Note that the pass count is reset
 276          each time a page is complete in order to move on to the next page.
 277          If we can't find any more pages then we are finished.  */
 278       if (new_pass)
 279         {
 280           pass = 1;
 281           new_pass = FALSE;
 282           changed = TRUE; /* Pre-initialize to break out of pass 1.  */
 283           search_addr = 0xFFFFFFFF;
 284         }
 285
 286       if ((BASEADDR (sec) + sec->size < search_addr)
 287           && (BASEADDR (sec) + sec->size > page_end))
 288         {
 289           if (BASEADDR (sec) <= page_end)
 290             search_addr = page_end + 1;
 291           else
 292             search_addr = BASEADDR (sec);
 293
 294           /* Found a page => more work to do.  */
 295           *again = TRUE;
 296         }
 297     }
 298   else
 299     {
 300       if (new_pass)
 301         {
 302           new_pass = FALSE;
 303           changed = FALSE;
 304           page_start = PAGENO (search_addr);
 305           page_end = page_start | 0x00003FFF;
 306         }
 307
 308       /* Only process sections in range.  */
 309       if ((BASEADDR (sec) + sec->size >= page_start)
 310           && (BASEADDR (sec) <= page_end))
 311         {
 312 #if 0
 313           if (!epiphany_elf_relax_section_page (abfd, sec, &changed, &misc,
 314                                                 page_start, page_end))
 315 #endif
 316             return FALSE;
 317         }
 318       *again = TRUE;
 319     }
 320
 321   /* Perform some house keeping after relaxing the section.  */
 322
 323   if (isymbuf != NULL
 324       && symtab_hdr->contents != (unsigned char *) isymbuf)
 325     {
 326       if (! link_info->keep_memory)
 327         free (isymbuf);
 328       else
 329         symtab_hdr->contents = (unsigned char *) isymbuf;
 330     }
 331
 332   if (contents != NULL
 333       && elf_section_data (sec)->this_hdr.contents != contents)
 334     {
 335       if (! link_info->keep_memory)
 336         free (contents);
 337       else
 338         {
 339           /* Cache the section contents for elf_link_input_bfd.  */
 340           elf_section_data (sec)->this_hdr.contents = contents;
 341         }
 342     }
 343
 344   if (internal_relocs != NULL
 345       && elf_section_data (sec)->relocs != internal_relocs)
 346     free (internal_relocs);
 347
 348   return TRUE;
 349
 350  error_return:
 351   if (isymbuf != NULL
 352       && symtab_hdr->contents != (unsigned char *) isymbuf)
 353     free (isymbuf);
 354   if (contents != NULL
 355       && elf_section_data (sec)->this_hdr.contents != contents)
 356     free (contents);
 357   if (internal_relocs != NULL
 358       && elf_section_data (sec)->relocs != internal_relocs)
 359     free (internal_relocs);
 360   return FALSE;
 361 }
 362
 363 /* Set the howto pointer for a EPIPHANY ELF reloc.  */
 364
 365 static bfd_boolean
 366 epiphany_info_to_howto_rela (bfd * abfd,
 367                              arelent * cache_ptr,
 368                              Elf_Internal_Rela * dst)
 369 {
 370   unsigned int r_type;
 371
 372   r_type = ELF32_R_TYPE (dst->r_info);
 373   if (r_type >= (unsigned int) R_EPIPHANY_max)
 374     {
 375       /* xgettext:c-format */
 376       _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
 377                           abfd, r_type);
 378       bfd_set_error (bfd_error_bad_value);
 379       return FALSE;
 380     }
 381   cache_ptr->howto = & epiphany_elf_howto_table [r_type];
 382   return TRUE;
 383 }
 384
 385 /* Perform a single relocation.
 386    By default we use the standard BFD routines.  */
 387
 388 static bfd_reloc_status_type
 389 epiphany_final_link_relocate (reloc_howto_type *  howto,
 390                               bfd *               input_bfd,
 391                               asection *          input_section,
 392                               bfd_byte *          contents,
 393                               Elf_Internal_Rela * rel,
 394                               bfd_vma             relocation)
 395 {
 396   switch (howto->type)
 397     {
 398       /* Handle 16 bit immediates.  */
 399     case R_EPIPHANY_HIGH:
 400       relocation += rel->r_addend;
 401       relocation >>= 16;
 402       goto common;
 403
 404     case R_EPIPHANY_LOW:
 405       relocation += rel->r_addend;
 406     common:
 407       relocation = ((relocation & 0xff00L) << 12)
 408         | ((relocation & 0x00ffL) << 5);
 409       /* Sanity check the address.  */
 410       if (rel->r_offset > bfd_get_section_limit (input_bfd, input_section))
 411         return bfd_reloc_outofrange;
 412
 413       return _bfd_relocate_contents (howto, input_bfd, relocation,
 414                                      contents + rel->r_offset);
 415
 416     case R_EPIPHANY_SIMM11:
 417       relocation += rel->r_addend;
 418       /* Check signed overflow.  */
 419       if ((int)relocation > 1023 || (int)relocation < -1024)
 420         return bfd_reloc_outofrange;
 421       goto disp11;
 422
 423     case R_EPIPHANY_IMM11:
 424       relocation += rel->r_addend;
 425       if ((unsigned int) relocation > 0x7ff)
 426         return bfd_reloc_outofrange;
 427       /* Fall through.  */
 428     disp11:
 429       relocation = (((relocation & 7) << 5)
 430                     | ((relocation & 0x7f8 ) << 13));
 431       return _bfd_relocate_contents (howto, input_bfd, relocation,
 432                                      contents + rel->r_offset);
 433
 434       /* Pass others through.  */
 435     default:
 436       break;
 437     }
 438
 439   /* Only install relocation if above tests did not disqualify it.  */
 440   return _bfd_final_link_relocate (howto, input_bfd, input_section,
 441                                    contents, rel->r_offset,
 442                                    relocation, rel->r_addend);
 443 }
 444
 445 /* Relocate an EPIPHANY ELF section.
 446
 447    The RELOCATE_SECTION function is called by the new ELF backend linker
 448    to handle the relocations for a section.
 449
 450    The relocs are always passed as Rela structures; if the section
 451    actually uses Rel structures, the r_addend field will always be
 452    zero.
 453
 454    This function is responsible for adjusting the section contents as
 455    necessary, and (if using Rela relocs and generating a relocatable
 456    output file) adjusting the reloc addend as necessary.
 457
 458    This function does not have to worry about setting the reloc
 459    address or the reloc symbol index.
 460
 461    LOCAL_SYMS is a pointer to the swapped in local symbols.
 462
 463    LOCAL_SECTIONS is an array giving the section in the input file
 464    corresponding to the st_shndx field of each local symbol.
 465
 466    The global hash table entry for the global symbols can be found
 467    via elf_sym_hashes (input_bfd).
 468
 469    When generating relocatable output, this function must handle
 470    STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
 471    going to be the section symbol corresponding to the output
 472    section, which means that the addend must be adjusted
 473    accordingly.  */
 474
 475 static bfd_boolean
 476 epiphany_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
 477                                struct bfd_link_info *info,
 478                                bfd *input_bfd,
 479                                asection *input_section,
 480                                bfd_byte *contents,
 481                                Elf_Internal_Rela *relocs,
 482                                Elf_Internal_Sym *local_syms,
 483                                asection **local_sections)
 484 {
 485   Elf_Internal_Shdr *symtab_hdr;
 486   struct elf_link_hash_entry **sym_hashes;
 487   Elf_Internal_Rela *rel;
 488   Elf_Internal_Rela *relend;
 489
 490   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
 491   sym_hashes = elf_sym_hashes (input_bfd);
 492   relend     = relocs + input_section->reloc_count;
 493
 494   for (rel = relocs; rel < relend; rel ++)
 495     {
 496       reloc_howto_type *           howto;
 497       unsigned long                r_symndx;
 498       Elf_Internal_Sym *           sym;
 499       asection *                   sec;
 500       struct elf_link_hash_entry * h;
 501       bfd_vma                      relocation;
 502       bfd_reloc_status_type        r;
 503       const char *                 name = NULL;
 504       int                          r_type ATTRIBUTE_UNUSED;
 505
 506       r_type = ELF32_R_TYPE (rel->r_info);
 507       r_symndx = ELF32_R_SYM (rel->r_info);
 508       howto  = epiphany_elf_howto_table + ELF32_R_TYPE (rel->r_info);
 509       h      = NULL;
 510       sym    = NULL;
 511       sec    = NULL;
 512
 513       if (r_symndx < symtab_hdr->sh_info)
 514         {
 515           sym = local_syms + r_symndx;
 516           sec = local_sections [r_symndx];
 517           relocation = BASEADDR (sec) + sym->st_value;
 518
 519           name = bfd_elf_string_from_elf_section
 520             (input_bfd, symtab_hdr->sh_link, sym->st_name);
 521           name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
 522         }
 523       else
 524         {
 525           bfd_boolean warned ATTRIBUTE_UNUSED;
 526           bfd_boolean unresolved_reloc ATTRIBUTE_UNUSED;
 527           bfd_boolean ignored ATTRIBUTE_UNUSED;
 528
 529           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
 530                                    r_symndx, symtab_hdr, sym_hashes,
 531                                    h, sec, relocation,
 532                                    unresolved_reloc, warned, ignored);
 533
 534           name = h->root.root.string;
 535         }
 536
 537       if (sec != NULL && discarded_section (sec))
 538         RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
 539                                          rel, 1, relend, howto, 0, contents);
 540
 541       if (bfd_link_relocatable (info))
 542         continue;
 543
 544       /* Finally, the sole EPIPHANY-specific part.  */
 545       r = epiphany_final_link_relocate (howto, input_bfd, input_section,
 546                                      contents, rel, relocation);
 547
 548       if (r != bfd_reloc_ok)
 549         {
 550           const char * msg = NULL;
 551
 552           switch (r)
 553             {
 554             case bfd_reloc_overflow:
 555               (*info->callbacks->reloc_overflow)
 556                 (info, (h ? &h->root : NULL), name, howto->name,
 557                  (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
 558               break;
 559
 560             case bfd_reloc_undefined:
 561               (*info->callbacks->undefined_symbol)
 562                 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
 563               break;
 564
 565             case bfd_reloc_outofrange:
 566               msg = _("internal error: out of range error");
 567               break;
 568
 569               /* This is how epiphany_final_link_relocate tells us of a
 570                  non-kosher reference between insn & data address spaces.  */
 571             case bfd_reloc_notsupported:
 572               if (sym != NULL) /* Only if it's not an unresolved symbol.  */
 573                  msg = _("unsupported relocation between data/insn address spaces");
 574               break;
 575
 576             case bfd_reloc_dangerous:
 577               msg = _("internal error: dangerous relocation");
 578               break;
 579
 580             default:
 581               msg = _("internal error: unknown error");
 582               break;
 583             }
 584
 585           if (msg)
 586             (*info->callbacks->warning) (info, msg, name, input_bfd,
 587                                          input_section, rel->r_offset);
 588         }
 589     }
 590
 591   return TRUE;
 592 }
 593
 594 /* We only have a little-endian target.  */
 595 #define TARGET_LITTLE_SYM        epiphany_elf32_vec
 596 #define TARGET_LITTLE_NAME  "elf32-epiphany"
 597
 598 #define ELF_ARCH         bfd_arch_epiphany
 599 #define ELF_MACHINE_CODE EM_ADAPTEVA_EPIPHANY
 600
 601 #define ELF_MAXPAGESIZE  0x8000 /* No pages on the EPIPHANY.  */
 602
 603 #define elf_info_to_howto_rel                   NULL
 604 #define elf_info_to_howto                       epiphany_info_to_howto_rela
 605
 606 #define elf_backend_can_gc_sections             1
 607 #define elf_backend_rela_normal                 1
 608 #define elf_backend_relocate_section            epiphany_elf_relocate_section
 609
 610 #define elf_symbol_leading_char                 '_'
 611 #define bfd_elf32_bfd_reloc_type_lookup         epiphany_reloc_type_lookup
 612 #define bfd_elf32_bfd_reloc_name_lookup         epiphany_reloc_name_lookup
 613 #define bfd_elf32_bfd_relax_section             epiphany_elf_relax_section
 614
 615 #include "elf32-target.h"