bfd/aout-arm.c

   1 /* BFD back-end for raw ARM a.out binaries.
   2    Copyright (C) 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
   3    Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
   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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21
  22 #define N_TXTADDR(x) \
  23   ((N_MAGIC(x) == NMAGIC) ? 0x8000 : \
  24    (N_MAGIC(x) != ZMAGIC) ? 0 : \
  25    (N_SHARED_LIB(x)) ? ((x).a_entry & ~(TARGET_PAGE_SIZE - 1)) : \
  26    TEXT_START_ADDR)
  27
  28 #define TEXT_START_ADDR 0x8000
  29 #define TARGET_PAGE_SIZE 0x8000
  30 #define SEGMENT_SIZE TARGET_PAGE_SIZE
  31 #define DEFAULT_ARCH bfd_arch_arm
  32
  33 #define MY(OP) CAT(aoutarm_,OP)
  34 #define N_BADMAG(x) ((((x).a_info & ~007200) != ZMAGIC) && \
  35                      (((x).a_info & ~006000) != OMAGIC) && \
  36                      ((x).a_info != NMAGIC))
  37 #define N_MAGIC(x) ((x).a_info & ~07200)
  38
  39 #include "bfd.h"
  40 #include "sysdep.h"
  41
  42 #define MYARM(OP) CAT(aoutarm_,OP)
  43 reloc_howto_type        *MYARM(bfd_reloc_type_lookup)
  44                                 PARAMS((bfd *, bfd_reloc_code_real_type));
  45 static boolean          MYARM(write_object_contents)    PARAMS((bfd *));
  46
  47 /* Avoid multiple defininitions from aoutx if supporting standarad a.out
  48    as well as our own.  */
  49 #define NAME(x,y) CAT3(aoutarm,_32_,y)
  50
  51 #define MY_bfd_reloc_type_lookup aoutarm_bfd_reloc_type_lookup
  52
  53 #include "libaout.h"
  54 #include "aout/aout64.h"
  55
  56 static bfd_reloc_status_type
  57 MY(fix_pcrel_26_done)   PARAMS ((bfd *, arelent *, asymbol *, PTR,
  58                                  asection *, bfd *, char **));
  59
  60 static bfd_reloc_status_type
  61 MY(fix_pcrel_26)         PARAMS ((bfd *, arelent *, asymbol *, PTR,
  62                                   asection *, bfd *, char **));
  63 static void MY(swap_std_reloc_in) PARAMS ((bfd *, struct reloc_std_external *,
  64                                            arelent *, asymbol **,
  65                                            bfd_size_type));
  66 void MY(swap_std_reloc_out) PARAMS ((bfd *, arelent *,
  67                                      struct reloc_std_external *));
  68
  69 reloc_howto_type MY(howto_table)[] =
  70 {
  71   /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask
  72      pcdone */
  73   HOWTO (0, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "8", true,
  74          0x000000ff, 0x000000ff, false),
  75   HOWTO (1, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "16", true,
  76          0x0000ffff, 0x0000ffff, false),
  77   HOWTO (2, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "32", true,
  78          0xffffffff, 0xffffffff, false),
  79   HOWTO (3, 2, 2, 26, true, 0, complain_overflow_signed, MY(fix_pcrel_26),
  80          "ARM26", true, 0x00ffffff, 0x00ffffff, true),
  81   HOWTO (4, 0, 0, 8, true, 0, complain_overflow_signed, 0, "DISP8", true,
  82          0x000000ff, 0x000000ff, true),
  83   HOWTO (5, 0, 1, 16, true, 0, complain_overflow_signed, 0, "DISP16", true,
  84          0x0000ffff, 0x0000ffff, true),
  85   HOWTO (6, 0, 2, 32, true, 0, complain_overflow_signed, 0, "DISP32", true,
  86          0xffffffff, 0xffffffff, true),
  87   HOWTO (7, 2, 2, 26, false, 0, complain_overflow_signed,
  88          MY(fix_pcrel_26_done), "ARM26D", true, 0x0, 0x0,
  89          false),
  90   {-1},
  91   HOWTO (9, 0, -1, 16, false, 0, complain_overflow_bitfield, 0, "NEG16", true,
  92          0x0000ffff, 0x0000ffff, false),
  93   HOWTO (10, 0, -2, 32, false, 0, complain_overflow_bitfield, 0, "NEG32", true,
  94          0xffffffff, 0xffffffff, false)
  95 };
  96
  97 #define RELOC_ARM_BITS_NEG_BIG      ((unsigned int) 0x08)
  98 #define RELOC_ARM_BITS_NEG_LITTLE   ((unsigned int) 0x10)
  99
 100 reloc_howto_type *
 101 MY(reloc_howto)(abfd, rel, r_index, r_extern, r_pcrel)
 102      bfd *abfd;
 103      struct reloc_std_external *rel;
 104      int *r_index;
 105      int *r_extern;
 106      int *r_pcrel;
 107 {
 108   unsigned int r_length;
 109   unsigned int r_pcrel_done;
 110   unsigned int r_neg;
 111   int index;
 112
 113   *r_pcrel = 0;
 114   if (bfd_header_big_endian (abfd))
 115     {
 116       *r_index     =  ((rel->r_index[0] << 16)
 117                        | (rel->r_index[1] << 8)
 118                        | rel->r_index[2]);
 119       *r_extern    = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
 120       r_pcrel_done = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
 121       r_neg        = (0 != (rel->r_type[0] & RELOC_ARM_BITS_NEG_BIG));
 122       r_length     = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
 123                       >> RELOC_STD_BITS_LENGTH_SH_BIG);
 124     }
 125   else
 126     {
 127       *r_index     = ((rel->r_index[2] << 16)
 128                       | (rel->r_index[1] << 8)
 129                       | rel->r_index[0]);
 130       *r_extern    = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
 131       r_pcrel_done = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
 132       r_neg        = (0 != (rel->r_type[0] & RELOC_ARM_BITS_NEG_LITTLE));
 133       r_length     = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
 134                       >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
 135     }
 136   index = r_length + 4 * r_pcrel_done + 8 * r_neg;
 137   if (index == 3)
 138     *r_pcrel = 1;
 139
 140   return MY(howto_table) + index;
 141 }
 142
 143 #define MY_reloc_howto(BFD, REL, IN, EX, PC) \
 144         MY(reloc_howto) (BFD, REL, &IN, &EX, &PC)
 145
 146 void
 147 MY(put_reloc)(abfd, r_extern, r_index, value, howto, reloc)
 148      bfd *abfd;
 149      int r_extern;
 150      int r_index;
 151      long value;
 152      reloc_howto_type *howto;
 153      struct reloc_std_external *reloc;
 154 {
 155   unsigned int r_length;
 156   int r_pcrel;
 157   int r_neg;
 158
 159   PUT_WORD (abfd, value, reloc->r_address);
 160   r_length = howto->size ;      /* Size as a power of two */
 161
 162   /* Special case for branch relocations. */
 163   if (howto->type == 3 || howto->type == 7)
 164     r_length = 3;
 165
 166   r_pcrel  = howto->type & 4;   /* PC Relative done? */
 167   r_neg = howto->type & 8;      /* Negative relocation */
 168   if (bfd_header_big_endian (abfd))
 169     {
 170       reloc->r_index[0] = r_index >> 16;
 171       reloc->r_index[1] = r_index >> 8;
 172       reloc->r_index[2] = r_index;
 173       reloc->r_type[0] =
 174         ((r_extern ?     RELOC_STD_BITS_EXTERN_BIG : 0)
 175          | (r_pcrel ?    RELOC_STD_BITS_PCREL_BIG : 0)
 176          | (r_neg ?      RELOC_ARM_BITS_NEG_BIG : 0)
 177          | (r_length <<  RELOC_STD_BITS_LENGTH_SH_BIG));
 178     }
 179   else
 180     {
 181       reloc->r_index[2] = r_index >> 16;
 182       reloc->r_index[1] = r_index >> 8;
 183       reloc->r_index[0] = r_index;
 184       reloc->r_type[0] =
 185         ((r_extern ?     RELOC_STD_BITS_EXTERN_LITTLE : 0)
 186          | (r_pcrel ?    RELOC_STD_BITS_PCREL_LITTLE : 0)
 187          | (r_neg ?      RELOC_ARM_BITS_NEG_LITTLE : 0)
 188          | (r_length <<  RELOC_STD_BITS_LENGTH_SH_LITTLE));
 189     }
 190 }
 191
 192 #define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \
 193   MY(put_reloc)(BFD, EXT, IDX, VAL, HOWTO, RELOC)
 194
 195 void
 196 MY(relocatable_reloc)(howto, abfd, reloc, amount, r_addr)
 197      reloc_howto_type *howto;
 198      bfd *abfd;
 199      struct reloc_std_external *reloc;
 200      bfd_vma *amount;
 201      bfd_vma r_addr;
 202 {
 203   if (howto->type == 3)
 204     {
 205       if (reloc->r_type[0]
 206           & (bfd_header_big_endian (abfd)
 207              ? RELOC_STD_BITS_EXTERN_BIG : RELOC_STD_BITS_EXTERN_LITTLE))
 208         {
 209           /* The reloc is still external, so don't modify anything. */
 210           *amount = 0;
 211         }
 212       else
 213         {
 214           *amount -= r_addr;
 215           /* Change the r_pcrel value -- on the ARM, this bit is set once the
 216              relocation is done.  */
 217           if (bfd_header_big_endian (abfd))
 218             reloc->r_type[0] |= RELOC_STD_BITS_PCREL_BIG;
 219           else
 220             reloc->r_type[0] |= RELOC_STD_BITS_PCREL_LITTLE;
 221         }
 222     }
 223   else if (howto->type == 7)
 224     *amount = 0;
 225 }
 226
 227 #define MY_relocatable_reloc(HOW, BFD, REL, AMOUNT, ADDR) \
 228   MY(relocatable_reloc)(HOW, BFD, REL, &(AMOUNT), ADDR)
 229
 230 static bfd_reloc_status_type
 231 MY(fix_pcrel_26_done) (abfd, reloc_entry, symbol, data, input_section,
 232                        output_bfd, error_message)
 233      bfd *abfd;
 234      arelent *reloc_entry;
 235      asymbol *symbol;
 236      PTR data;
 237      asection *input_section;
 238      bfd *output_bfd;
 239      char **error_message;
 240 {
 241   /* This is dead simple at present.  */
 242   return bfd_reloc_ok;
 243 }
 244
 245 static bfd_reloc_status_type
 246 MY(fix_pcrel_26) (abfd, reloc_entry, symbol, data, input_section,
 247                   output_bfd, error_message)
 248      bfd *abfd;
 249      arelent *reloc_entry;
 250      asymbol *symbol;
 251      PTR data;
 252      asection *input_section;
 253      bfd *output_bfd;
 254      char **error_message;
 255 {
 256   bfd_vma relocation;
 257   bfd_size_type addr = reloc_entry->address;
 258   long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
 259   bfd_reloc_status_type flag = bfd_reloc_ok;
 260
 261   /* If this is an undefined symbol, return error */
 262   if (symbol->section == &bfd_und_section
 263       && (symbol->flags & BSF_WEAK) == 0)
 264     return output_bfd ? bfd_reloc_ok : bfd_reloc_undefined;
 265
 266   /* If the sections are different, and we are doing a partial relocation,
 267      just ignore it for now.  */
 268   if (symbol->section->name != input_section->name
 269       && output_bfd != (bfd *)NULL)
 270     return bfd_reloc_ok;
 271
 272   relocation = (target & 0x00ffffff) << 2;
 273   relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */
 274   relocation += symbol->value;
 275   relocation += symbol->section->output_section->vma;
 276   relocation += symbol->section->output_offset;
 277   relocation += reloc_entry->addend;
 278   relocation -= input_section->output_section->vma;
 279   relocation -= input_section->output_offset;
 280   relocation -= addr;
 281   if (relocation & 3)
 282     return bfd_reloc_overflow;
 283
 284   /* Check for overflow */
 285   if (relocation & 0x02000000)
 286     {
 287       if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff)
 288         flag = bfd_reloc_overflow;
 289     }
 290   else if (relocation & ~0x03ffffff)
 291     flag = bfd_reloc_overflow;
 292
 293   target &= ~0x00ffffff;
 294   target |= (relocation >> 2) & 0x00ffffff;
 295   bfd_put_32 (abfd, target, (bfd_byte *) data + addr);
 296
 297   /* Now the ARM magic... Change the reloc type so that it is marked as done.
 298      Strictly this is only necessary if we are doing a partial relocation.  */
 299   reloc_entry->howto = &MY(howto_table)[7];
 300
 301   return flag;
 302 }
 303
 304 reloc_howto_type *
 305 MY(bfd_reloc_type_lookup)(abfd,code)
 306      bfd *abfd;
 307      bfd_reloc_code_real_type code;
 308 {
 309 #define ASTD(i,j)       case i: return &MY(howto_table)[j]
 310   if (code == BFD_RELOC_CTOR)
 311     switch (bfd_get_arch_info (abfd)->bits_per_address)
 312       {
 313       case 32:
 314         code = BFD_RELOC_32;
 315         break;
 316       default: return (CONST struct reloc_howto_struct *) 0;
 317       }
 318
 319   switch (code)
 320     {
 321       ASTD (BFD_RELOC_16, 1);
 322       ASTD (BFD_RELOC_32, 2);
 323       ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3);
 324       ASTD (BFD_RELOC_8_PCREL, 4);
 325       ASTD (BFD_RELOC_16_PCREL, 5);
 326       ASTD (BFD_RELOC_32_PCREL, 6);
 327     default: return (CONST struct reloc_howto_struct *) 0;
 328     }
 329 }
 330
 331 #define MY_swap_std_reloc_in MY(swap_std_reloc_in)
 332 #define MY_swap_std_reloc_out MY(swap_std_reloc_out)
 333 #define MY_get_section_contents _bfd_generic_get_section_contents
 334 /* #define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create */
 335 /* #define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols */
 336 /* #define MY_bfd_final_link _bfd_generic_final_link */
 337
 338 #include "aoutx.h"
 339
 340 static void
 341 MY_swap_std_reloc_in (abfd, bytes, cache_ptr, symbols, symcount)
 342      bfd *abfd;
 343      struct reloc_std_external *bytes;
 344      arelent *cache_ptr;
 345      asymbol **symbols;
 346      bfd_size_type symcount;
 347 {
 348   int r_index;
 349   int r_extern;
 350   int r_pcrel;
 351   struct aoutdata *su = &(abfd->tdata.aout_data->a);
 352
 353   cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
 354
 355   cache_ptr->howto = MY_reloc_howto (abfd, bytes, r_index, r_extern, r_pcrel);
 356
 357   MOVE_ADDRESS (0);
 358 }
 359
 360 void
 361 MY_swap_std_reloc_out (abfd, g, natptr)
 362      bfd *abfd;
 363      arelent *g;
 364      struct reloc_std_external *natptr;
 365 {
 366   int r_index;
 367   asymbol *sym = *(g->sym_ptr_ptr);
 368   int r_extern;
 369   int r_length;
 370   int r_pcrel;
 371   int r_neg = 0;        /* Negative relocs use the BASEREL bit.  */
 372   asection *output_section = sym->section->output_section;
 373
 374   PUT_WORD(abfd, g->address, natptr->r_address);
 375
 376   r_length = g->howto->size ;   /* Size as a power of two */
 377   if (r_length < 0)
 378     {
 379       r_length = -r_length;
 380       r_neg = 1;
 381     }
 382
 383   r_pcrel  = (int) g->howto->pc_relative; /* Relative to PC? */
 384
 385   /* For RISC iX, in pc-relative relocs the r_pcrel bit means that the
 386      relocation has been done already (Only for the 26-bit one I think)???!!!
 387      */
 388
 389   if (g->howto->type == 3)
 390     {
 391       r_length = 3;
 392       r_pcrel = 0;
 393     }
 394   else if (g->howto->type == 7)
 395     {
 396       r_length = 3;
 397       r_pcrel = 1;
 398     }
 399
 400
 401 #if 0
 402   /* For a standard reloc, the addend is in the object file.  */
 403   r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
 404 #endif
 405
 406   /* name was clobbered by aout_write_syms to be symbol index */
 407
 408   /* If this relocation is relative to a symbol then set the
 409      r_index to the symbols index, and the r_extern bit.
 410
 411      Absolute symbols can come in in two ways, either as an offset
 412      from the abs section, or as a symbol which has an abs value.
 413      check for that here
 414      */
 415
 416   if (bfd_is_com_section (output_section)
 417       || output_section == &bfd_abs_section
 418       || output_section == &bfd_und_section)
 419     {
 420       if (bfd_abs_section.symbol == sym)
 421         {
 422           /* Whoops, looked like an abs symbol, but is really an offset
 423              from the abs section */
 424           r_index = 0;
 425           r_extern = 0;
 426         }
 427       else
 428         {
 429           /* Fill in symbol */
 430           r_extern = 1;
 431           r_index = (*(g->sym_ptr_ptr))->KEEPIT;
 432         }
 433     }
 434   else
 435     {
 436       /* Just an ordinary section */
 437       r_extern = 0;
 438       r_index  = output_section->target_index;
 439     }
 440
 441   /* now the fun stuff */
 442   if (bfd_header_big_endian (abfd))
 443     {
 444       natptr->r_index[0] = r_index >> 16;
 445       natptr->r_index[1] = r_index >> 8;
 446       natptr->r_index[2] = r_index;
 447       natptr->r_type[0] =
 448         (  (r_extern ?   RELOC_STD_BITS_EXTERN_BIG: 0)
 449          | (r_pcrel  ?   RELOC_STD_BITS_PCREL_BIG: 0)
 450          | (r_neg    ?   RELOC_ARM_BITS_NEG_BIG: 0)
 451          | (r_length <<  RELOC_STD_BITS_LENGTH_SH_BIG));
 452     }
 453   else
 454     {
 455       natptr->r_index[2] = r_index >> 16;
 456       natptr->r_index[1] = r_index >> 8;
 457       natptr->r_index[0] = r_index;
 458       natptr->r_type[0] =
 459         (  (r_extern ?   RELOC_STD_BITS_EXTERN_LITTLE: 0)
 460          | (r_pcrel  ?   RELOC_STD_BITS_PCREL_LITTLE: 0)
 461          | (r_neg    ?   RELOC_ARM_BITS_NEG_LITTLE: 0)
 462          | (r_length <<  RELOC_STD_BITS_LENGTH_SH_LITTLE));
 463     }
 464 }
 465
 466 #define MY_BFD_TARGET
 467
 468 #include "aout-target.h"
 469
 470 const bfd_target aout_arm_little_vec =
 471 {
 472   "a.out-arm-little",           /* name */
 473   bfd_target_aout_flavour,
 474   BFD_ENDIAN_LITTLE,            /* target byte order (little) */
 475   BFD_ENDIAN_LITTLE,            /* target headers byte order (little) */
 476   (HAS_RELOC | EXEC_P |         /* object flags */
 477    HAS_LINENO | HAS_DEBUG |
 478    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
 479   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
 480   MY_symbol_leading_char,
 481   AR_PAD_CHAR,                  /* ar_pad_char */
 482   15,                           /* ar_max_namelen */
 483   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 484      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 485      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
 486   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 487      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 488      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
 489     {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
 490        bfd_generic_archive_p, MY_core_file_p},
 491     {bfd_false, MY_mkobject,    /* bfd_set_format */
 492        _bfd_generic_mkarchive, bfd_false},
 493     {bfd_false, MY_write_object_contents, /* bfd_write_contents */
 494        _bfd_write_archive_contents, bfd_false},
 495
 496      BFD_JUMP_TABLE_GENERIC (MY),
 497      BFD_JUMP_TABLE_COPY (MY),
 498      BFD_JUMP_TABLE_CORE (MY),
 499      BFD_JUMP_TABLE_ARCHIVE (MY),
 500      BFD_JUMP_TABLE_SYMBOLS (MY),
 501      BFD_JUMP_TABLE_RELOCS (MY),
 502      BFD_JUMP_TABLE_WRITE (MY),
 503      BFD_JUMP_TABLE_LINK (MY),
 504      BFD_JUMP_TABLE_DYNAMIC (MY),
 505
 506   (PTR) MY_backend_data,
 507 };
 508
 509 const bfd_target aout_arm_big_vec =
 510 {
 511   "a.out-arm-big",           /* name */
 512   bfd_target_aout_flavour,
 513   BFD_ENDIAN_BIG,               /* target byte order (big) */
 514   BFD_ENDIAN_BIG,               /* target headers byte order (big) */
 515   (HAS_RELOC | EXEC_P |         /* object flags */
 516    HAS_LINENO | HAS_DEBUG |
 517    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
 518   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
 519   MY_symbol_leading_char,
 520   AR_PAD_CHAR,                  /* ar_pad_char */
 521   15,                           /* ar_max_namelen */
 522   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 523      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 524      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
 525   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 526      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 527      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
 528     {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
 529        bfd_generic_archive_p, MY_core_file_p},
 530     {bfd_false, MY_mkobject,    /* bfd_set_format */
 531        _bfd_generic_mkarchive, bfd_false},
 532     {bfd_false, MY_write_object_contents, /* bfd_write_contents */
 533        _bfd_write_archive_contents, bfd_false},
 534
 535      BFD_JUMP_TABLE_GENERIC (MY),
 536      BFD_JUMP_TABLE_COPY (MY),
 537      BFD_JUMP_TABLE_CORE (MY),
 538      BFD_JUMP_TABLE_ARCHIVE (MY),
 539      BFD_JUMP_TABLE_SYMBOLS (MY),
 540      BFD_JUMP_TABLE_RELOCS (MY),
 541      BFD_JUMP_TABLE_WRITE (MY),
 542      BFD_JUMP_TABLE_LINK (MY),
 543      BFD_JUMP_TABLE_DYNAMIC (MY),
 544
 545   (PTR) MY_backend_data,
 546 };