bfd/elf32-xgate.c

   1 /* Freescale XGATE-specific support for 32-bit ELF
   2    Copyright 2010, 2011, 2012
   3    Free Software Foundation, Inc.
   4    Contributed by Sean Keys(skeys@ipdatasys.com)
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "bfdlink.h"
  26 #include "libbfd.h"
  27 #include "elf-bfd.h"
  28 #include "elf32-xgate.h"
  29 #include "elf/xgate.h"
  30 #include "opcode/xgate.h"
  31 #include "libiberty.h"
  32
  33 /* Relocation functions.  */
  34 static reloc_howto_type *
  35 bfd_elf32_bfd_reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
  36 static reloc_howto_type *
  37 bfd_elf32_bfd_reloc_name_lookup (bfd *, const char *);
  38 static void
  39 xgate_info_to_howto_rel (bfd *, arelent *, Elf_Internal_Rela *);
  40 static bfd_boolean
  41 xgate_elf_set_mach_from_flags (bfd *);
  42 static struct bfd_hash_entry *
  43 stub_hash_newfunc (struct bfd_hash_entry *, struct bfd_hash_table *,
  44     const char *);
  45 static struct bfd_link_hash_table*
  46 xgate_elf_bfd_link_hash_table_create (bfd *);
  47
  48 /* Use REL instead of RELA to save space */
  49 #define USE_REL 1
  50
  51 static reloc_howto_type elf_xgate_howto_table[] =
  52 {
  53   /* This reloc does nothing.  */
  54   HOWTO (R_XGATE_NONE, /* type */
  55          0, /* rightshift */
  56          2, /* size (0 = byte, 1 = short, 2 = long) */
  57          32, /* bitsize */
  58          FALSE, /* pc_relative */
  59          0, /* bitpos */
  60          complain_overflow_dont,/* complain_on_overflow */
  61          bfd_elf_generic_reloc, /* special_function */
  62          "R_XGATE_NONE", /* name */
  63          FALSE, /* partial_inplace */
  64          0, /* src_mask */
  65          0, /* dst_mask */
  66          FALSE), /* pcrel_offset */
  67
  68   /* A 8 bit absolute relocation.  */
  69   HOWTO (R_XGATE_8, /* type */
  70          0, /* rightshift */
  71          0, /* size (0 = byte, 1 = short, 2 = long) */
  72          8, /* bitsize */
  73          FALSE, /* pc_relative */
  74          0, /* bitpos */
  75          complain_overflow_bitfield, /* complain_on_overflow */
  76          bfd_elf_generic_reloc, /* special_function */
  77          "R_XGATE_8", /* name */
  78          FALSE, /* partial_inplace */
  79          0x00ff, /* src_mask */
  80          0x00ff, /* dst_mask */
  81          FALSE), /* pcrel_offset */
  82
  83   /* A 8 bit PC-rel relocation.  */
  84   HOWTO (R_XGATE_PCREL_8, /* type */
  85          0, /* rightshift */
  86          0, /* size (0 = byte, 1 = short, 2 = long) */
  87          8, /* bitsize */
  88          TRUE, /* pc_relative */
  89          0, /* bitpos */
  90          complain_overflow_bitfield, /* complain_on_overflow */
  91          bfd_elf_generic_reloc, /* special_function */
  92          "R_XGATE_PCREL_8", /* name */
  93          FALSE, /* partial_inplace */
  94          0x00ff, /* src_mask */
  95          0x00ff, /* dst_mask */
  96          TRUE), /* pcrel_offset */
  97
  98   /* A 16 bit absolute relocation.  */
  99   HOWTO (R_XGATE_16, /* type */
 100          0, /* rightshift */
 101          1, /* size (0 = byte, 1 = short, 2 = long) */
 102          16, /* bitsize */
 103          FALSE, /* pc_relative */
 104          0, /* bitpos */
 105          complain_overflow_dont /*bitfield */, /* complain_on_overflow */
 106          bfd_elf_generic_reloc, /* special_function */
 107          "R_XGATE_16", /* name */
 108          FALSE, /* partial_inplace */
 109          0xffff, /* src_mask */
 110          0xffff, /* dst_mask */
 111          FALSE), /* pcrel_offset */
 112
 113   /* A 32 bit absolute relocation.  This one is never used for the
 114      code relocation.  It's used by gas for -gstabs generation.  */
 115   HOWTO (R_XGATE_32, /* type */
 116          0, /* rightshift */
 117          2, /* size (0 = byte, 1 = short, 2 = long) */
 118          32, /* bitsize */
 119          FALSE, /* pc_relative */
 120          0, /* bitpos */
 121          complain_overflow_bitfield, /* complain_on_overflow */
 122          bfd_elf_generic_reloc, /* special_function */
 123          "R_XGATE_32", /* name */
 124          FALSE, /* partial_inplace */
 125          0xffffffff, /* src_mask */
 126          0xffffffff, /* dst_mask */
 127          FALSE), /* pcrel_offset */
 128
 129   /* A 16 bit PC-rel relocation.  */
 130   HOWTO (R_XGATE_PCREL_16, /* type */
 131          0, /* rightshift */
 132          1, /* size (0 = byte, 1 = short, 2 = long) */
 133          16, /* bitsize */
 134          TRUE, /* pc_relative */
 135          0, /* bitpos */
 136          complain_overflow_dont, /* complain_on_overflow */
 137          bfd_elf_generic_reloc, /* special_function */
 138          "R_XGATE_PCREL_16", /* name */
 139          FALSE, /* partial_inplace */
 140          0xffff, /* src_mask */
 141          0xffff, /* dst_mask */
 142          TRUE), /* pcrel_offset */
 143
 144   /* GNU extension to record C++ vtable hierarchy.  */
 145   HOWTO (R_XGATE_GNU_VTINHERIT, /* type */
 146          0, /* rightshift */
 147          1, /* size (0 = byte, 1 = short, 2 = long) */
 148          0, /* bitsize */
 149          FALSE, /* pc_relative */
 150          0, /* bitpos */
 151          complain_overflow_dont, /* complain_on_overflow */
 152          NULL, /* special_function */
 153          "R_XGATE_GNU_VTINHERIT", /* name */
 154          FALSE, /* partial_inplace */
 155          0, /* src_mask */
 156          0, /* dst_mask */
 157          FALSE), /* pcrel_offset */
 158
 159   /* GNU extension to record C++ vtable member usage.  */
 160   HOWTO (R_XGATE_GNU_VTENTRY, /* type */
 161          0, /* rightshift */
 162          1, /* size (0 = byte, 1 = short, 2 = long) */
 163          0, /* bitsize */
 164          FALSE, /* pc_relative */
 165          0, /* bitpos */
 166          complain_overflow_dont, /* complain_on_overflow */
 167          _bfd_elf_rel_vtable_reloc_fn, /* special_function */
 168          "R_XGATE_GNU_VTENTRY", /* name */
 169          FALSE, /* partial_inplace */
 170          0, /* src_mask */
 171          0, /* dst_mask */
 172          FALSE), /* pcrel_offset */
 173
 174   /* A 24 bit relocation.  */
 175   HOWTO (R_XGATE_24, /* type */
 176          0, /* rightshift */
 177          1, /* size (0 = byte, 1 = short, 2 = long) */
 178          16, /* bitsize */
 179          FALSE, /* pc_relative */
 180          0, /* bitpos */
 181          complain_overflow_dont, /* complain_on_overflow */
 182          bfd_elf_generic_reloc, /* special_function */
 183          "R_XGATE_IMM8_LO", /* name */
 184          FALSE, /* partial_inplace */
 185          0x00ff, /* src_mask */
 186          0x00ff, /* dst_mask */
 187          FALSE), /* pcrel_offset */
 188
 189   /* A 16-bit low relocation.  */
 190   HOWTO (R_XGATE_LO16, /* type */
 191          8, /* rightshift */
 192          1, /* size (0 = byte, 1 = short, 2 = long) */
 193          16, /* bitsize */
 194          FALSE, /* pc_relative */
 195          0, /* bitpos */
 196          complain_overflow_dont, /* complain_on_overflow */
 197          bfd_elf_generic_reloc, /* special_function */
 198          "R_XGATE_IMM8_HI", /* name */
 199          FALSE, /* partial_inplace */
 200          0x00ff, /* src_mask */
 201          0x00ff, /* dst_mask */
 202          FALSE), /* pcrel_offset */
 203
 204   /* A page relocation.  */
 205   HOWTO (R_XGATE_GPAGE, /* type */
 206          0, /* rightshift */
 207          0, /* size (0 = byte, 1 = short, 2 = long) */
 208          8, /* bitsize */
 209          FALSE, /* pc_relative */
 210          0, /* bitpos */
 211          complain_overflow_dont, /* complain_on_overflow */
 212          xgate_elf_special_reloc,/* special_function */
 213          "R_XGATE_GPAGE", /* name */
 214          FALSE, /* partial_inplace */
 215          0x00ff, /* src_mask */
 216          0x00ff, /* dst_mask */
 217          FALSE), /* pcrel_offset */
 218
 219   /* A 9 bit absolute relocation.   */
 220   HOWTO (R_XGATE_PCREL_9, /* type */
 221          0, /* rightshift */
 222          1, /* size (0 = byte, 1 = short, 2 = long) */
 223          9, /* bitsize */
 224          TRUE, /* pc_relative */
 225          0, /* bitpos */
 226          complain_overflow_bitfield, /* complain_on_overflow */
 227          bfd_elf_generic_reloc, /* special_function */
 228          "R_XGATE_PCREL_9", /* name */
 229          FALSE, /* partial_inplace */
 230          0xffff, /* src_mask */
 231          0xffff, /* dst_mask */
 232          TRUE), /* pcrel_offset */
 233
 234   /* A 8 bit absolute relocation (upper address).  */
 235   HOWTO (R_XGATE_PCREL_10, /* type */
 236          8, /* rightshift */
 237          0, /* size (0 = byte, 1 = short, 2 = long) */
 238          10, /* bitsize */
 239          TRUE, /* pc_relative */
 240          0, /* bitpos */
 241          complain_overflow_dont, /* complain_on_overflow */
 242          bfd_elf_generic_reloc, /* special_function */
 243          "R_XGATE_PCREL_10", /* name */
 244          FALSE, /* partial_inplace */
 245          0x00ff, /* src_mask */
 246          0x00ff, /* dst_mask */
 247          TRUE), /* pcrel_offset */
 248
 249   /* A 8 bit absolute relocation.  */
 250   HOWTO (R_XGATE_IMM8_LO, /* type */
 251          0, /* rightshift */
 252          1, /* size (0 = byte, 1 = short, 2 = long) */
 253          16, /* bitsize */
 254          FALSE, /* pc_relative */
 255          0, /* bitpos */
 256          complain_overflow_dont, /* complain_on_overflow */
 257          bfd_elf_generic_reloc, /* special_function */
 258          "R_XGATE_IMM8_LO", /* name */
 259          FALSE, /* partial_inplace */
 260          0xffff, /* src_mask */
 261          0xffff, /* dst_mask */
 262          FALSE), /* pcrel_offset */
 263
 264   /* A 16 bit absolute relocation (upper address).  */
 265   HOWTO (R_XGATE_IMM8_HI, /* type */
 266          8, /* rightshift */
 267          1, /* size (0 = byte, 1 = short, 2 = long) */
 268          16, /* bitsize */
 269          FALSE, /* pc_relative */
 270          0, /* bitpos */
 271          complain_overflow_dont, /* complain_on_overflow */
 272          bfd_elf_generic_reloc, /* special_function */
 273          "R_XGATE_IMM8_HI", /* name */
 274          FALSE, /* partial_inplace */
 275          0x00ff, /* src_mask */
 276          0x00ff, /* dst_mask */
 277          FALSE), /* pcrel_offset */
 278
 279   /* A 3 bit absolute relocation.  */
 280   HOWTO (R_XGATE_IMM3, /* type */
 281          8, /* rightshift */
 282          1, /* size (0 = byte, 1 = short, 2 = long) */
 283          16, /* bitsize */
 284          FALSE, /* pc_relative */
 285          0, /* bitpos */
 286          complain_overflow_dont, /* complain_on_overflow */
 287          bfd_elf_generic_reloc, /* special_function */
 288          "R_XGATE_IMM3", /* name */
 289          FALSE, /* partial_inplace */
 290          0x00ff, /* src_mask */
 291          0x00ff, /* dst_mask */
 292          FALSE), /* pcrel_offset */
 293
 294   /* A 4 bit absolute relocation.  */
 295   HOWTO (R_XGATE_IMM4, /* type */
 296          8, /* rightshift */
 297          1, /* size (0 = byte, 1 = short, 2 = long) */
 298          16, /* bitsize */
 299          FALSE, /* pc_relative */
 300          0, /* bitpos */
 301          complain_overflow_dont, /* complain_on_overflow */
 302          bfd_elf_generic_reloc, /* special_function */
 303          "R_XGATE_IMM4", /* name */
 304          FALSE, /* partial_inplace */
 305          0x00ff, /* src_mask */
 306          0x00ff, /* dst_mask */
 307          FALSE), /* pcrel_offset */
 308
 309   /* A 5 bit absolute relocation.  */
 310   HOWTO (R_XGATE_IMM5, /* type */
 311          8, /* rightshift */
 312          1, /* size (0 = byte, 1 = short, 2 = long) */
 313          16, /* bitsize */
 314          FALSE, /* pc_relative */
 315          0, /* bitpos */
 316          complain_overflow_dont, /* complain_on_overflow */
 317          bfd_elf_generic_reloc, /* special_function */
 318          "R_XGATE_IMM5", /* name */
 319          FALSE, /* partial_inplace */
 320          0x00ff, /* src_mask */
 321          0x00ff, /* dst_mask */
 322          FALSE), /* pcrel_offset */
 323
 324   /* Mark beginning of a jump instruction (any form).  */
 325   HOWTO (R_XGATE_RL_JUMP, /* type */
 326          0, /* rightshift */
 327          1, /* size (0 = byte, 1 = short, 2 = long) */
 328          0, /* bitsize */
 329          FALSE, /* pc_relative */
 330          0, /* bitpos */
 331          complain_overflow_dont, /* complain_on_overflow */
 332          xgate_elf_ignore_reloc, /* special_function */
 333          "R_XGATE_RL_JUMP", /* name */
 334          TRUE, /* partial_inplace */
 335          0, /* src_mask */
 336          0, /* dst_mask */
 337          TRUE), /* pcrel_offset */
 338
 339   /* Mark beginning of Gcc relaxation group instruction.  */
 340   HOWTO (R_XGATE_RL_GROUP, /* type */
 341          0, /* rightshift */
 342          1, /* size (0 = byte, 1 = short, 2 = long) */
 343          0, /* bitsize */
 344          FALSE, /* pc_relative */
 345          0, /* bitpos */
 346          complain_overflow_dont, /* complain_on_overflow */
 347          xgate_elf_ignore_reloc, /* special_function */
 348          "R_XGATE_RL_GROUP", /* name */
 349          TRUE, /* partial_inplace */
 350          0, /* src_mask */
 351          0, /* dst_mask */
 352          TRUE), /* pcrel_offset */
 353 };
 354
 355 /* Map BFD reloc types to XGATE ELF reloc types.  */
 356
 357 struct xgate_reloc_map
 358 {
 359   bfd_reloc_code_real_type bfd_reloc_val;
 360   unsigned char elf_reloc_val;
 361 };
 362
 363 static const struct xgate_reloc_map xgate_reloc_map[] =
 364 {
 365   {BFD_RELOC_NONE, R_XGATE_NONE},
 366   {BFD_RELOC_8, R_XGATE_8},
 367   {BFD_RELOC_8_PCREL, R_XGATE_PCREL_8},
 368   {BFD_RELOC_16_PCREL, R_XGATE_PCREL_16},
 369   {BFD_RELOC_16, R_XGATE_16},
 370   {BFD_RELOC_32, R_XGATE_32},
 371
 372   {BFD_RELOC_VTABLE_INHERIT, R_XGATE_GNU_VTINHERIT},
 373   {BFD_RELOC_VTABLE_ENTRY, R_XGATE_GNU_VTENTRY},
 374
 375   {BFD_RELOC_XGATE_LO16, R_XGATE_LO16},
 376   {BFD_RELOC_XGATE_GPAGE, R_XGATE_GPAGE},
 377   {BFD_RELOC_XGATE_24, R_XGATE_24},
 378   {BFD_RELOC_XGATE_PCREL_9, R_XGATE_PCREL_9},
 379   {BFD_RELOC_XGATE_PCREL_10,  R_XGATE_PCREL_10},
 380   {BFD_RELOC_XGATE_IMM8_LO, R_XGATE_IMM8_LO},
 381   {BFD_RELOC_XGATE_IMM8_HI, R_XGATE_IMM8_HI},
 382   {BFD_RELOC_XGATE_IMM3, R_XGATE_IMM3},
 383   {BFD_RELOC_XGATE_IMM4, R_XGATE_IMM4},
 384   {BFD_RELOC_XGATE_IMM5, R_XGATE_IMM5},
 385
 386   {BFD_RELOC_XGATE_RL_JUMP, R_XGATE_RL_JUMP},
 387   {BFD_RELOC_XGATE_RL_GROUP, R_XGATE_RL_GROUP},
 388 };
 389
 390 static reloc_howto_type *
 391 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 392                                  bfd_reloc_code_real_type code)
 393 {
 394   unsigned int i;
 395
 396   for (i = 0; i < ARRAY_SIZE (xgate_reloc_map); i++)
 397     if (xgate_reloc_map[i].bfd_reloc_val == code)
 398       return &elf_xgate_howto_table[xgate_reloc_map[i].elf_reloc_val];
 399
 400   return NULL;
 401 }
 402
 403 static reloc_howto_type *
 404 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
 405 {
 406   unsigned int i;
 407
 408   for (i = 0; i < ARRAY_SIZE (elf_xgate_howto_table); i++)
 409     if (elf_xgate_howto_table[i].name != NULL
 410         && strcasecmp (elf_xgate_howto_table[i].name, r_name) == 0)
 411       return &elf_xgate_howto_table[i];
 412
 413   return NULL;
 414 }
 415
 416 /* Set the howto pointer for an XGATE ELF reloc.  */
 417
 418 static void
 419 xgate_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
 420                          arelent *cache_ptr,
 421                          Elf_Internal_Rela *dst)
 422 {
 423   unsigned int r_type;
 424
 425   r_type = ELF32_R_TYPE (dst->r_info);
 426   BFD_ASSERT(r_type < (unsigned int) R_XGATE_max);
 427   cache_ptr->howto = &elf_xgate_howto_table[r_type];
 428 }
 429
 430 /* Free the derived linker hash table.  */
 431
 432 void
 433 xgate_elf_bfd_link_hash_table_free (struct bfd_link_hash_table *hash)
 434 {
 435   struct xgate_elf_link_hash_table *ret =
 436       (struct xgate_elf_link_hash_table *) hash;
 437
 438   bfd_hash_table_free (ret->stub_hash_table);
 439   free (ret->stub_hash_table);
 440   _bfd_elf_link_hash_table_free (hash);
 441 }
 442
 443 /* Create a XGATE ELF linker hash table.  */
 444
 445 static struct bfd_link_hash_table*
 446 xgate_elf_bfd_link_hash_table_create (bfd *abfd)
 447 {
 448   struct xgate_elf_link_hash_table *ret;
 449   bfd_size_type amt = sizeof(struct xgate_elf_link_hash_table);
 450
 451   ret = (struct xgate_elf_link_hash_table *) bfd_zmalloc (amt);
 452   if (ret == (struct xgate_elf_link_hash_table *) NULL)
 453     return NULL;
 454
 455   if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
 456       _bfd_elf_link_hash_newfunc, sizeof(struct elf_link_hash_entry),
 457       XGATE_ELF_DATA))
 458     {
 459       free (ret);
 460       return NULL;
 461     }
 462
 463   /* Init the stub hash table too.  */
 464   amt = sizeof(struct bfd_hash_table);
 465   ret->stub_hash_table = (struct bfd_hash_table*) bfd_zmalloc (amt);
 466   if (ret->stub_hash_table == NULL)
 467     {
 468       free (ret);
 469       return NULL;
 470     }
 471
 472   if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc,
 473       sizeof(struct elf32_xgate_stub_hash_entry)))
 474     {
 475       free (ret->stub_hash_table);
 476       free (ret);
 477       return NULL;
 478     }
 479
 480   return &ret->root.root;
 481 }
 482
 483 static bfd_boolean
 484 xgate_elf_set_mach_from_flags (bfd *abfd ATTRIBUTE_UNUSED)
 485 {
 486   return TRUE;
 487 }
 488
 489 /* Specific sections:
 490  - The .page0 is a data section that is mapped in [0x0000..0x00FF].
 491    Page0 accesses are faster on the M68HC12.
 492  - The .vectors is the section that represents the interrupt
 493    vectors.
 494  - The .xgate section is starts in 0xE08800 or as xgate sees it 0x0800. */
 495 static const struct bfd_elf_special_section elf32_xgate_special_sections[] =
 496 {
 497   { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
 498   { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
 499   { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
 500   { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC },
 501 /*{ STRING_COMMA_LEN (".xgate"),    0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
 502   TODO finish this implementation */
 503   { NULL, 0, 0, 0, 0 }
 504 };
 505
 506 struct xgate_scan_param
 507 {
 508   struct xgate_page_info* pinfo;
 509   bfd_boolean use_memory_banks;
 510 };
 511
 512 /* Assorted hash table functions.  */
 513
 514 /* Initialize an entry in the stub hash table.  */
 515
 516 static struct bfd_hash_entry *
 517 stub_hash_newfunc (struct bfd_hash_entry *entry,
 518                    struct bfd_hash_table *table ATTRIBUTE_UNUSED,
 519                    const char *string ATTRIBUTE_UNUSED)
 520 {
 521   return entry;
 522 }
 523
 524 /* Hook called by the linker routine which adds symbols from an object
 525    file. */
 526
 527 bfd_boolean
 528 elf32_xgate_add_symbol_hook (bfd *abfd ATTRIBUTE_UNUSED,
 529                              struct bfd_link_info *info ATTRIBUTE_UNUSED,
 530                              Elf_Internal_Sym *sym,
 531                              const char **namep ATTRIBUTE_UNUSED,
 532                              flagword *flagsp ATTRIBUTE_UNUSED,
 533                              asection **secp ATTRIBUTE_UNUSED,
 534                              bfd_vma *valp ATTRIBUTE_UNUSED)
 535 {
 536   /* For some reason the st_target_internal value is not retained
 537      after xgate_frob_symbol is called, hence this temp hack.  */
 538   sym->st_target_internal = 1;
 539   return TRUE;
 540 }
 541
 542 /* External entry points for sizing and building linker stubs.  */
 543
 544 /* Set up various things so that we can make a list of input sections
 545    for each output section included in the link.  Returns -1 on error,
 546    0 when no stubs will be needed, and 1 on success.  */
 547
 548 int
 549 elf32_xgate_setup_section_lists (bfd *output_bfd ATTRIBUTE_UNUSED,
 550                                  struct bfd_link_info *info ATTRIBUTE_UNUSED)
 551 {
 552   return 1;
 553 }
 554
 555 /* Determine and set the size of the stub section for a final link.
 556    The basic idea here is to examine all the relocations looking for
 557    PC-relative calls to a target that is unreachable with any "9-bit PC-REL"
 558    instruction.  */
 559
 560 bfd_boolean
 561 elf32_xgate_size_stubs (bfd *output_bfd ATTRIBUTE_UNUSED,
 562                         bfd *stub_bfd ATTRIBUTE_UNUSED,
 563                         struct bfd_link_info *info ATTRIBUTE_UNUSED,
 564                         asection * (*add_stub_section) (const char*, asection*) ATTRIBUTE_UNUSED)
 565 {
 566   return FALSE;
 567 }
 568
 569 /* Build all the stubs associated with the current output file.  The
 570    stubs are kept in a hash table attached to the main linker hash
 571    table.  This function is called via xgateelf_finish in the
 572    linker.  */
 573
 574 bfd_boolean
 575 elf32_xgate_build_stubs (bfd *abfd ATTRIBUTE_UNUSED,
 576                          struct bfd_link_info *info ATTRIBUTE_UNUSED)
 577 {
 578   return TRUE;
 579 }
 580
 581 void
 582 xgate_elf_get_bank_parameters (struct bfd_link_info *info ATTRIBUTE_UNUSED)
 583 {
 584   return;
 585 }
 586
 587 /* This function is used for relocs which are only used for relaxing,
 588    which the linker should otherwise ignore.  */
 589
 590 bfd_reloc_status_type
 591 xgate_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED,
 592                         arelent *reloc_entry,
 593                         asymbol *symbol ATTRIBUTE_UNUSED,
 594                         void *data ATTRIBUTE_UNUSED,
 595                         asection *input_section,
 596                         bfd *output_bfd,
 597                         char **error_message ATTRIBUTE_UNUSED)
 598 {
 599   if (output_bfd != NULL)
 600     reloc_entry->address += input_section->output_offset;
 601   return bfd_reloc_ok;
 602 }
 603
 604 bfd_reloc_status_type
 605 xgate_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED,
 606                          arelent *reloc_entry ATTRIBUTE_UNUSED,
 607                          asymbol *symbol ATTRIBUTE_UNUSED,
 608                          void *data ATTRIBUTE_UNUSED,
 609                          asection *input_section ATTRIBUTE_UNUSED,
 610                          bfd *output_bfd ATTRIBUTE_UNUSED,
 611                          char **error_message ATTRIBUTE_UNUSED)
 612 {
 613   abort ();
 614 }
 615
 616 /* Look through the relocs for a section during the first phase.
 617    Since we don't do .gots or .plts, we just need to consider the
 618    virtual table relocs for gc.  */
 619
 620 bfd_boolean
 621 elf32_xgate_check_relocs (bfd *abfd ATTRIBUTE_UNUSED,
 622                           struct bfd_link_info *info ATTRIBUTE_UNUSED,
 623                           asection *sec ATTRIBUTE_UNUSED,
 624                           const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
 625 {
 626   return TRUE;
 627 }
 628
 629 /* Relocate a XGATE/S12x ELF section.  */
 630
 631 bfd_boolean
 632 elf32_xgate_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
 633                               struct bfd_link_info *info ATTRIBUTE_UNUSED,
 634                               bfd *input_bfd ATTRIBUTE_UNUSED,
 635                               asection *input_section ATTRIBUTE_UNUSED,
 636                               bfd_byte *contents ATTRIBUTE_UNUSED,
 637                               Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED,
 638                               Elf_Internal_Sym *local_syms ATTRIBUTE_UNUSED,
 639                               asection **local_sections ATTRIBUTE_UNUSED)
 640 {
 641   return TRUE;
 642 }
 643
 644 /* Set and control ELF flags in ELF header.  */
 645
 646 bfd_boolean
 647 _bfd_xgate_elf_set_private_flags (bfd *abfd ATTRIBUTE_UNUSED,
 648                                   flagword flags ATTRIBUTE_UNUSED)
 649 {
 650   return TRUE;
 651 }
 652
 653 /* Merge backend specific data from an object file to the output
 654    object file when linking.  */
 655
 656 bfd_boolean
 657 _bfd_xgate_elf_merge_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
 658                                        bfd *obfd ATTRIBUTE_UNUSED)
 659 {
 660   return TRUE;
 661 }
 662
 663 bfd_boolean
 664 _bfd_xgate_elf_print_private_bfd_data (bfd *abfd, void *ptr)
 665 {
 666   FILE *file = (FILE *) ptr;
 667
 668   BFD_ASSERT (abfd != NULL && ptr != NULL);
 669
 670   /* Print normal ELF private data.  */
 671   _bfd_elf_print_private_bfd_data (abfd, ptr);
 672
 673   /* xgettext:c-format */
 674   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
 675
 676   if (elf_elfheader (abfd)->e_flags & E_XGATE_I32)
 677     fprintf (file, _("[abi=32-bit int, "));
 678   else
 679     fprintf (file, _("[abi=16-bit int, "));
 680
 681   if (elf_elfheader (abfd)->e_flags & E_XGATE_F64)
 682     fprintf (file, _("64-bit double, "));
 683   else
 684     fprintf (file, _("32-bit double, "));
 685   if (elf_elfheader (abfd)->e_flags & EF_XGATE_MACH)
 686     fprintf (file, _("cpu=XGATE]"));
 687   else
 688     fprintf (file, _("error reading cpu type from elf private data"));
 689   fputc ('\n', file);
 690
 691   return TRUE;
 692 }
 693
 694 void
 695 elf32_xgate_post_process_headers (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *link_info ATTRIBUTE_UNUSED)
 696 {
 697
 698 }
 699
 700 #define ELF_ARCH                             bfd_arch_xgate
 701 #define ELF_MACHINE_CODE                     EM_XGATE
 702 #define ELF_TARGET_ID                        XGATE_ELF_DATA
 703
 704 #define ELF_MAXPAGESIZE                      0x1000
 705
 706 #define TARGET_BIG_SYM                       bfd_elf32_xgate_vec
 707 #define TARGET_BIG_NAME                      "elf32-xgate"
 708
 709 #define elf_info_to_howto                    0
 710 #define elf_info_to_howto_rel                xgate_info_to_howto_rel
 711 #define elf_backend_check_relocs             elf32_xgate_check_relocs
 712 #define elf_backend_relocate_section         elf32_xgate_relocate_section
 713 #define elf_backend_object_p                 xgate_elf_set_mach_from_flags
 714 #define elf_backend_final_write_processing   0
 715 #define elf_backend_can_gc_sections          1
 716 #define elf_backend_special_sections         elf32_xgate_special_sections
 717 #define elf_backend_post_process_headers     elf32_xgate_post_process_headers
 718 #define elf_backend_add_symbol_hook          elf32_xgate_add_symbol_hook
 719
 720 #define bfd_elf32_bfd_link_hash_table_create xgate_elf_bfd_link_hash_table_create
 721 #define bfd_elf32_bfd_link_hash_table_free   xgate_elf_bfd_link_hash_table_free
 722 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_xgate_elf_merge_private_bfd_data
 723 #define bfd_elf32_bfd_set_private_flags      _bfd_xgate_elf_set_private_flags
 724 #define bfd_elf32_bfd_print_private_bfd_data _bfd_xgate_elf_print_private_bfd_data
 725
 726 #define xgate_stub_hash_lookup(table, string, create, copy)     \
 727     ((struct elf32_xgate_stub_hash_entry *) \
 728         bfd_hash_lookup ((table), (string), (create), (copy)))
 729
 730 #include "elf32-target.h"