bfd/elf32-i386.c

   1 /* Intel 80386/80486-specific support for 32-bit ELF
   2    Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   3    2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "bfdlink.h"
  25 #include "libbfd.h"
  26 #include "elf-bfd.h"
  27 #include "elf-vxworks.h"
  28 #include "bfd_stdint.h"
  29 #include "objalloc.h"
  30 #include "hashtab.h"
  31
  32 /* 386 uses REL relocations instead of RELA.  */
  33 #define USE_REL 1
  34
  35 #include "elf/i386.h"
  36
  37 static reloc_howto_type elf_howto_table[]=
  38 {
  39   HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
  40         bfd_elf_generic_reloc, "R_386_NONE",
  41         TRUE, 0x00000000, 0x00000000, FALSE),
  42   HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  43         bfd_elf_generic_reloc, "R_386_32",
  44         TRUE, 0xffffffff, 0xffffffff, FALSE),
  45   HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  46         bfd_elf_generic_reloc, "R_386_PC32",
  47         TRUE, 0xffffffff, 0xffffffff, TRUE),
  48   HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  49         bfd_elf_generic_reloc, "R_386_GOT32",
  50         TRUE, 0xffffffff, 0xffffffff, FALSE),
  51   HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  52         bfd_elf_generic_reloc, "R_386_PLT32",
  53         TRUE, 0xffffffff, 0xffffffff, TRUE),
  54   HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  55         bfd_elf_generic_reloc, "R_386_COPY",
  56         TRUE, 0xffffffff, 0xffffffff, FALSE),
  57   HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  58         bfd_elf_generic_reloc, "R_386_GLOB_DAT",
  59         TRUE, 0xffffffff, 0xffffffff, FALSE),
  60   HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  61         bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
  62         TRUE, 0xffffffff, 0xffffffff, FALSE),
  63   HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  64         bfd_elf_generic_reloc, "R_386_RELATIVE",
  65         TRUE, 0xffffffff, 0xffffffff, FALSE),
  66   HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  67         bfd_elf_generic_reloc, "R_386_GOTOFF",
  68         TRUE, 0xffffffff, 0xffffffff, FALSE),
  69   HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  70         bfd_elf_generic_reloc, "R_386_GOTPC",
  71         TRUE, 0xffffffff, 0xffffffff, TRUE),
  72
  73   /* We have a gap in the reloc numbers here.
  74      R_386_standard counts the number up to this point, and
  75      R_386_ext_offset is the value to subtract from a reloc type of
  76      R_386_16 thru R_386_PC8 to form an index into this table.  */
  77 #define R_386_standard (R_386_GOTPC + 1)
  78 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
  79
  80   /* These relocs are a GNU extension.  */
  81   HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  82         bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
  83         TRUE, 0xffffffff, 0xffffffff, FALSE),
  84   HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  85         bfd_elf_generic_reloc, "R_386_TLS_IE",
  86         TRUE, 0xffffffff, 0xffffffff, FALSE),
  87   HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  88         bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
  89         TRUE, 0xffffffff, 0xffffffff, FALSE),
  90   HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  91         bfd_elf_generic_reloc, "R_386_TLS_LE",
  92         TRUE, 0xffffffff, 0xffffffff, FALSE),
  93   HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  94         bfd_elf_generic_reloc, "R_386_TLS_GD",
  95         TRUE, 0xffffffff, 0xffffffff, FALSE),
  96   HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  97         bfd_elf_generic_reloc, "R_386_TLS_LDM",
  98         TRUE, 0xffffffff, 0xffffffff, FALSE),
  99   HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 100         bfd_elf_generic_reloc, "R_386_16",
 101         TRUE, 0xffff, 0xffff, FALSE),
 102   HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
 103         bfd_elf_generic_reloc, "R_386_PC16",
 104         TRUE, 0xffff, 0xffff, TRUE),
 105   HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
 106         bfd_elf_generic_reloc, "R_386_8",
 107         TRUE, 0xff, 0xff, FALSE),
 108   HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
 109         bfd_elf_generic_reloc, "R_386_PC8",
 110         TRUE, 0xff, 0xff, TRUE),
 111
 112 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
 113 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
 114   /* These are common with Solaris TLS implementation.  */
 115   HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 116         bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
 117         TRUE, 0xffffffff, 0xffffffff, FALSE),
 118   HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 119         bfd_elf_generic_reloc, "R_386_TLS_IE_32",
 120         TRUE, 0xffffffff, 0xffffffff, FALSE),
 121   HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 122         bfd_elf_generic_reloc, "R_386_TLS_LE_32",
 123         TRUE, 0xffffffff, 0xffffffff, FALSE),
 124   HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 125         bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
 126         TRUE, 0xffffffff, 0xffffffff, FALSE),
 127   HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 128         bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
 129         TRUE, 0xffffffff, 0xffffffff, FALSE),
 130   HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 131         bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
 132         TRUE, 0xffffffff, 0xffffffff, FALSE),
 133   EMPTY_HOWTO (38),
 134   HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 135         bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
 136         TRUE, 0xffffffff, 0xffffffff, FALSE),
 137   HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 138         bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
 139         FALSE, 0, 0, FALSE),
 140   HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 141         bfd_elf_generic_reloc, "R_386_TLS_DESC",
 142         TRUE, 0xffffffff, 0xffffffff, FALSE),
 143   HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 144         bfd_elf_generic_reloc, "R_386_IRELATIVE",
 145         TRUE, 0xffffffff, 0xffffffff, FALSE),
 146
 147   /* Another gap.  */
 148 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
 149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
 150
 151 /* GNU extension to record C++ vtable hierarchy.  */
 152   HOWTO (R_386_GNU_VTINHERIT,   /* type */
 153          0,                     /* rightshift */
 154          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 155          0,                     /* bitsize */
 156          FALSE,                 /* pc_relative */
 157          0,                     /* bitpos */
 158          complain_overflow_dont, /* complain_on_overflow */
 159          NULL,                  /* special_function */
 160          "R_386_GNU_VTINHERIT", /* name */
 161          FALSE,                 /* partial_inplace */
 162          0,                     /* src_mask */
 163          0,                     /* dst_mask */
 164          FALSE),                /* pcrel_offset */
 165
 166 /* GNU extension to record C++ vtable member usage.  */
 167   HOWTO (R_386_GNU_VTENTRY,     /* type */
 168          0,                     /* rightshift */
 169          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 170          0,                     /* bitsize */
 171          FALSE,                 /* pc_relative */
 172          0,                     /* bitpos */
 173          complain_overflow_dont, /* complain_on_overflow */
 174          _bfd_elf_rel_vtable_reloc_fn, /* special_function */
 175          "R_386_GNU_VTENTRY",   /* name */
 176          FALSE,                 /* partial_inplace */
 177          0,                     /* src_mask */
 178          0,                     /* dst_mask */
 179          FALSE)                 /* pcrel_offset */
 180
 181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
 182
 183 };
 184
 185 #ifdef DEBUG_GEN_RELOC
 186 #define TRACE(str) \
 187   fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
 188 #else
 189 #define TRACE(str)
 190 #endif
 191
 192 static reloc_howto_type *
 193 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 194                             bfd_reloc_code_real_type code)
 195 {
 196   switch (code)
 197     {
 198     case BFD_RELOC_NONE:
 199       TRACE ("BFD_RELOC_NONE");
 200       return &elf_howto_table[R_386_NONE];
 201
 202     case BFD_RELOC_32:
 203       TRACE ("BFD_RELOC_32");
 204       return &elf_howto_table[R_386_32];
 205
 206     case BFD_RELOC_CTOR:
 207       TRACE ("BFD_RELOC_CTOR");
 208       return &elf_howto_table[R_386_32];
 209
 210     case BFD_RELOC_32_PCREL:
 211       TRACE ("BFD_RELOC_PC32");
 212       return &elf_howto_table[R_386_PC32];
 213
 214     case BFD_RELOC_386_GOT32:
 215       TRACE ("BFD_RELOC_386_GOT32");
 216       return &elf_howto_table[R_386_GOT32];
 217
 218     case BFD_RELOC_386_PLT32:
 219       TRACE ("BFD_RELOC_386_PLT32");
 220       return &elf_howto_table[R_386_PLT32];
 221
 222     case BFD_RELOC_386_COPY:
 223       TRACE ("BFD_RELOC_386_COPY");
 224       return &elf_howto_table[R_386_COPY];
 225
 226     case BFD_RELOC_386_GLOB_DAT:
 227       TRACE ("BFD_RELOC_386_GLOB_DAT");
 228       return &elf_howto_table[R_386_GLOB_DAT];
 229
 230     case BFD_RELOC_386_JUMP_SLOT:
 231       TRACE ("BFD_RELOC_386_JUMP_SLOT");
 232       return &elf_howto_table[R_386_JUMP_SLOT];
 233
 234     case BFD_RELOC_386_RELATIVE:
 235       TRACE ("BFD_RELOC_386_RELATIVE");
 236       return &elf_howto_table[R_386_RELATIVE];
 237
 238     case BFD_RELOC_386_GOTOFF:
 239       TRACE ("BFD_RELOC_386_GOTOFF");
 240       return &elf_howto_table[R_386_GOTOFF];
 241
 242     case BFD_RELOC_386_GOTPC:
 243       TRACE ("BFD_RELOC_386_GOTPC");
 244       return &elf_howto_table[R_386_GOTPC];
 245
 246       /* These relocs are a GNU extension.  */
 247     case BFD_RELOC_386_TLS_TPOFF:
 248       TRACE ("BFD_RELOC_386_TLS_TPOFF");
 249       return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
 250
 251     case BFD_RELOC_386_TLS_IE:
 252       TRACE ("BFD_RELOC_386_TLS_IE");
 253       return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
 254
 255     case BFD_RELOC_386_TLS_GOTIE:
 256       TRACE ("BFD_RELOC_386_TLS_GOTIE");
 257       return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
 258
 259     case BFD_RELOC_386_TLS_LE:
 260       TRACE ("BFD_RELOC_386_TLS_LE");
 261       return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
 262
 263     case BFD_RELOC_386_TLS_GD:
 264       TRACE ("BFD_RELOC_386_TLS_GD");
 265       return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
 266
 267     case BFD_RELOC_386_TLS_LDM:
 268       TRACE ("BFD_RELOC_386_TLS_LDM");
 269       return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
 270
 271     case BFD_RELOC_16:
 272       TRACE ("BFD_RELOC_16");
 273       return &elf_howto_table[R_386_16 - R_386_ext_offset];
 274
 275     case BFD_RELOC_16_PCREL:
 276       TRACE ("BFD_RELOC_16_PCREL");
 277       return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
 278
 279     case BFD_RELOC_8:
 280       TRACE ("BFD_RELOC_8");
 281       return &elf_howto_table[R_386_8 - R_386_ext_offset];
 282
 283     case BFD_RELOC_8_PCREL:
 284       TRACE ("BFD_RELOC_8_PCREL");
 285       return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
 286
 287     /* Common with Sun TLS implementation.  */
 288     case BFD_RELOC_386_TLS_LDO_32:
 289       TRACE ("BFD_RELOC_386_TLS_LDO_32");
 290       return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
 291
 292     case BFD_RELOC_386_TLS_IE_32:
 293       TRACE ("BFD_RELOC_386_TLS_IE_32");
 294       return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
 295
 296     case BFD_RELOC_386_TLS_LE_32:
 297       TRACE ("BFD_RELOC_386_TLS_LE_32");
 298       return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
 299
 300     case BFD_RELOC_386_TLS_DTPMOD32:
 301       TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
 302       return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
 303
 304     case BFD_RELOC_386_TLS_DTPOFF32:
 305       TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
 306       return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
 307
 308     case BFD_RELOC_386_TLS_TPOFF32:
 309       TRACE ("BFD_RELOC_386_TLS_TPOFF32");
 310       return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
 311
 312     case BFD_RELOC_386_TLS_GOTDESC:
 313       TRACE ("BFD_RELOC_386_TLS_GOTDESC");
 314       return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
 315
 316     case BFD_RELOC_386_TLS_DESC_CALL:
 317       TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
 318       return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
 319
 320     case BFD_RELOC_386_TLS_DESC:
 321       TRACE ("BFD_RELOC_386_TLS_DESC");
 322       return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
 323
 324     case BFD_RELOC_386_IRELATIVE:
 325       TRACE ("BFD_RELOC_386_IRELATIVE");
 326       return &elf_howto_table[R_386_IRELATIVE];
 327
 328     case BFD_RELOC_VTABLE_INHERIT:
 329       TRACE ("BFD_RELOC_VTABLE_INHERIT");
 330       return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
 331
 332     case BFD_RELOC_VTABLE_ENTRY:
 333       TRACE ("BFD_RELOC_VTABLE_ENTRY");
 334       return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
 335
 336     default:
 337       break;
 338     }
 339
 340   TRACE ("Unknown");
 341   return 0;
 342 }
 343
 344 static reloc_howto_type *
 345 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 346                             const char *r_name)
 347 {
 348   unsigned int i;
 349
 350   for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
 351     if (elf_howto_table[i].name != NULL
 352         && strcasecmp (elf_howto_table[i].name, r_name) == 0)
 353       return &elf_howto_table[i];
 354
 355   return NULL;
 356 }
 357
 358 static reloc_howto_type *
 359 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
 360 {
 361   unsigned int indx;
 362
 363   if ((indx = r_type) >= R_386_standard
 364       && ((indx = r_type - R_386_ext_offset) - R_386_standard
 365           >= R_386_ext - R_386_standard)
 366       && ((indx = r_type - R_386_tls_offset) - R_386_ext
 367           >= R_386_irelative - R_386_ext)
 368       && ((indx = r_type - R_386_vt_offset) - R_386_irelative
 369           >= R_386_vt - R_386_irelative))
 370     {
 371       (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
 372                              abfd, (int) r_type);
 373       indx = R_386_NONE;
 374     }
 375   BFD_ASSERT (elf_howto_table [indx].type == r_type);
 376   return &elf_howto_table[indx];
 377 }
 378
 379 static void
 380 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
 381                             arelent *cache_ptr,
 382                             Elf_Internal_Rela *dst)
 383 {
 384   unsigned int r_type = ELF32_R_TYPE (dst->r_info);
 385   cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
 386 }
 387
 388 /* Return whether a symbol name implies a local label.  The UnixWare
 389    2.1 cc generates temporary symbols that start with .X, so we
 390    recognize them here.  FIXME: do other SVR4 compilers also use .X?.
 391    If so, we should move the .X recognition into
 392    _bfd_elf_is_local_label_name.  */
 393
 394 static bfd_boolean
 395 elf_i386_is_local_label_name (bfd *abfd, const char *name)
 396 {
 397   if (name[0] == '.' && name[1] == 'X')
 398     return TRUE;
 399
 400   return _bfd_elf_is_local_label_name (abfd, name);
 401 }
 402 \f
 403 /* Support for core dump NOTE sections.  */
 404
 405 static bfd_boolean
 406 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
 407 {
 408   int offset;
 409   size_t size;
 410
 411   if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
 412     {
 413       int pr_version = bfd_get_32 (abfd, note->descdata);
 414
 415       if (pr_version != 1)
 416         return FALSE;
 417
 418       /* pr_cursig */
 419       elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
 420
 421       /* pr_pid */
 422       elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
 423
 424       /* pr_reg */
 425       offset = 28;
 426       size = bfd_get_32 (abfd, note->descdata + 8);
 427     }
 428   else
 429     {
 430       switch (note->descsz)
 431         {
 432         default:
 433           return FALSE;
 434
 435         case 144:               /* Linux/i386 */
 436           /* pr_cursig */
 437           elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
 438
 439           /* pr_pid */
 440           elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
 441
 442           /* pr_reg */
 443           offset = 72;
 444           size = 68;
 445
 446           break;
 447         }
 448     }
 449
 450   /* Make a ".reg/999" section.  */
 451   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
 452                                           size, note->descpos + offset);
 453 }
 454
 455 static bfd_boolean
 456 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
 457 {
 458   if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
 459     {
 460       int pr_version = bfd_get_32 (abfd, note->descdata);
 461
 462       if (pr_version != 1)
 463         return FALSE;
 464
 465       elf_tdata (abfd)->core_program
 466         = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
 467       elf_tdata (abfd)->core_command
 468         = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
 469     }
 470   else
 471     {
 472       switch (note->descsz)
 473         {
 474         default:
 475           return FALSE;
 476
 477         case 124:               /* Linux/i386 elf_prpsinfo.  */
 478           elf_tdata (abfd)->core_program
 479             = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 480           elf_tdata (abfd)->core_command
 481             = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 482         }
 483     }
 484
 485   /* Note that for some reason, a spurious space is tacked
 486      onto the end of the args in some (at least one anyway)
 487      implementations, so strip it off if it exists.  */
 488   {
 489     char *command = elf_tdata (abfd)->core_command;
 490     int n = strlen (command);
 491
 492     if (0 < n && command[n - 1] == ' ')
 493       command[n - 1] = '\0';
 494   }
 495
 496   return TRUE;
 497 }
 498 \f
 499 /* Functions for the i386 ELF linker.
 500
 501    In order to gain some understanding of code in this file without
 502    knowing all the intricate details of the linker, note the
 503    following:
 504
 505    Functions named elf_i386_* are called by external routines, other
 506    functions are only called locally.  elf_i386_* functions appear
 507    in this file more or less in the order in which they are called
 508    from external routines.  eg. elf_i386_check_relocs is called
 509    early in the link process, elf_i386_finish_dynamic_sections is
 510    one of the last functions.  */
 511
 512
 513 /* The name of the dynamic interpreter.  This is put in the .interp
 514    section.  */
 515
 516 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
 517
 518 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
 519    copying dynamic variables from a shared lib into an app's dynbss
 520    section, and instead use a dynamic relocation to point into the
 521    shared lib.  */
 522 #define ELIMINATE_COPY_RELOCS 1
 523
 524 /* The size in bytes of an entry in the procedure linkage table.  */
 525
 526 #define PLT_ENTRY_SIZE 16
 527
 528 /* The first entry in an absolute procedure linkage table looks like
 529    this.  See the SVR4 ABI i386 supplement to see how this works.
 530    Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte.  */
 531
 532 static const bfd_byte elf_i386_plt0_entry[12] =
 533 {
 534   0xff, 0x35,   /* pushl contents of address */
 535   0, 0, 0, 0,   /* replaced with address of .got + 4.  */
 536   0xff, 0x25,   /* jmp indirect */
 537   0, 0, 0, 0    /* replaced with address of .got + 8.  */
 538 };
 539
 540 /* Subsequent entries in an absolute procedure linkage table look like
 541    this.  */
 542
 543 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
 544 {
 545   0xff, 0x25,   /* jmp indirect */
 546   0, 0, 0, 0,   /* replaced with address of this symbol in .got.  */
 547   0x68,         /* pushl immediate */
 548   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 549   0xe9,         /* jmp relative */
 550   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 551 };
 552
 553 /* The first entry in a PIC procedure linkage table look like this.
 554    Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte.  */
 555
 556 static const bfd_byte elf_i386_pic_plt0_entry[12] =
 557 {
 558   0xff, 0xb3, 4, 0, 0, 0,       /* pushl 4(%ebx) */
 559   0xff, 0xa3, 8, 0, 0, 0        /* jmp *8(%ebx) */
 560 };
 561
 562 /* Subsequent entries in a PIC procedure linkage table look like this.  */
 563
 564 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
 565 {
 566   0xff, 0xa3,   /* jmp *offset(%ebx) */
 567   0, 0, 0, 0,   /* replaced with offset of this symbol in .got.  */
 568   0x68,         /* pushl immediate */
 569   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 570   0xe9,         /* jmp relative */
 571   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 572 };
 573
 574 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
 575    for the PLTResolve stub and then for each PLT entry.  */
 576 #define PLTRESOLVE_RELOCS_SHLIB 0
 577 #define PLTRESOLVE_RELOCS 2
 578 #define PLT_NON_JUMP_SLOT_RELOCS 2
 579
 580 /* i386 ELF linker hash entry.  */
 581
 582 struct elf_i386_link_hash_entry
 583 {
 584   struct elf_link_hash_entry elf;
 585
 586   /* Track dynamic relocs copied for this symbol.  */
 587   struct elf_dyn_relocs *dyn_relocs;
 588
 589 #define GOT_UNKNOWN     0
 590 #define GOT_NORMAL      1
 591 #define GOT_TLS_GD      2
 592 #define GOT_TLS_IE      4
 593 #define GOT_TLS_IE_POS  5
 594 #define GOT_TLS_IE_NEG  6
 595 #define GOT_TLS_IE_BOTH 7
 596 #define GOT_TLS_GDESC   8
 597 #define GOT_TLS_GD_BOTH_P(type)                                         \
 598   ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
 599 #define GOT_TLS_GD_P(type)                                              \
 600   ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
 601 #define GOT_TLS_GDESC_P(type)                                           \
 602   ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
 603 #define GOT_TLS_GD_ANY_P(type)                                          \
 604   (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
 605   unsigned char tls_type;
 606
 607   /* Offset of the GOTPLT entry reserved for the TLS descriptor,
 608      starting at the end of the jump table.  */
 609   bfd_vma tlsdesc_got;
 610 };
 611
 612 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
 613
 614 struct elf_i386_obj_tdata
 615 {
 616   struct elf_obj_tdata root;
 617
 618   /* tls_type for each local got entry.  */
 619   char *local_got_tls_type;
 620
 621   /* GOTPLT entries for TLS descriptors.  */
 622   bfd_vma *local_tlsdesc_gotent;
 623 };
 624
 625 #define elf_i386_tdata(abfd) \
 626   ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
 627
 628 #define elf_i386_local_got_tls_type(abfd) \
 629   (elf_i386_tdata (abfd)->local_got_tls_type)
 630
 631 #define elf_i386_local_tlsdesc_gotent(abfd) \
 632   (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
 633
 634 #define is_i386_elf(bfd)                                \
 635   (bfd_get_flavour (bfd) == bfd_target_elf_flavour      \
 636    && elf_tdata (bfd) != NULL                           \
 637    && elf_object_id (bfd) == I386_ELF_TDATA)
 638
 639 static bfd_boolean
 640 elf_i386_mkobject (bfd *abfd)
 641 {
 642   return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
 643                                   I386_ELF_TDATA);
 644 }
 645
 646 /* i386 ELF linker hash table.  */
 647
 648 struct elf_i386_link_hash_table
 649 {
 650   struct elf_link_hash_table elf;
 651
 652   /* Short-cuts to get to dynamic linker sections.  */
 653   asection *sdynbss;
 654   asection *srelbss;
 655
 656   /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.  */
 657   asection *srelplt2;
 658
 659   /* True if the target system is VxWorks.  */
 660   int is_vxworks;
 661
 662   /* Value used to fill the last word of the first plt entry.  */
 663   bfd_byte plt0_pad_byte;
 664
 665   /* The index of the next unused R_386_TLS_DESC slot in .rel.plt.  */
 666   bfd_vma next_tls_desc_index;
 667
 668   union {
 669     bfd_signed_vma refcount;
 670     bfd_vma offset;
 671   } tls_ldm_got;
 672
 673   /* The amount of space used by the reserved portion of the sgotplt
 674      section, plus whatever space is used by the jump slots.  */
 675   bfd_vma sgotplt_jump_table_size;
 676
 677   /* Small local sym to section mapping cache.  */
 678   struct sym_sec_cache sym_sec;
 679
 680   /* _TLS_MODULE_BASE_ symbol.  */
 681   struct bfd_link_hash_entry *tls_module_base;
 682
 683   /* Used by local STT_GNU_IFUNC symbols.  */
 684   htab_t loc_hash_table;
 685   void *loc_hash_memory;
 686 };
 687
 688 /* Get the i386 ELF linker hash table from a link_info structure.  */
 689
 690 #define elf_i386_hash_table(p) \
 691   ((struct elf_i386_link_hash_table *) ((p)->hash))
 692
 693 #define elf_i386_compute_jump_table_size(htab) \
 694   ((htab)->next_tls_desc_index * 4)
 695
 696 /* Create an entry in an i386 ELF linker hash table.  */
 697
 698 static struct bfd_hash_entry *
 699 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
 700                             struct bfd_hash_table *table,
 701                             const char *string)
 702 {
 703   /* Allocate the structure if it has not already been allocated by a
 704      subclass.  */
 705   if (entry == NULL)
 706     {
 707       entry = bfd_hash_allocate (table,
 708                                  sizeof (struct elf_i386_link_hash_entry));
 709       if (entry == NULL)
 710         return entry;
 711     }
 712
 713   /* Call the allocation method of the superclass.  */
 714   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 715   if (entry != NULL)
 716     {
 717       struct elf_i386_link_hash_entry *eh;
 718
 719       eh = (struct elf_i386_link_hash_entry *) entry;
 720       eh->dyn_relocs = NULL;
 721       eh->tls_type = GOT_UNKNOWN;
 722       eh->tlsdesc_got = (bfd_vma) -1;
 723     }
 724
 725   return entry;
 726 }
 727
 728 /* Compute a hash of a local hash entry.  We use elf_link_hash_entry
 729   for local symbol so that we can handle local STT_GNU_IFUNC symbols
 730   as global symbol.  We reuse indx and dynstr_index for local symbol
 731   hash since they aren't used by global symbols in this backend.  */
 732
 733 static hashval_t
 734 elf_i386_local_htab_hash (const void *ptr)
 735 {
 736   struct elf_link_hash_entry *h
 737     = (struct elf_link_hash_entry *) ptr;
 738   return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
 739 }
 740
 741 /* Compare local hash entries.  */
 742
 743 static int
 744 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
 745 {
 746   struct elf_link_hash_entry *h1
 747      = (struct elf_link_hash_entry *) ptr1;
 748   struct elf_link_hash_entry *h2
 749     = (struct elf_link_hash_entry *) ptr2;
 750
 751   return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
 752 }
 753
 754 /* Find and/or create a hash entry for local symbol.  */
 755
 756 static struct elf_link_hash_entry *
 757 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
 758                              bfd *abfd, const Elf_Internal_Rela *rel,
 759                              bfd_boolean create)
 760 {
 761   struct elf_i386_link_hash_entry e, *ret;
 762   asection *sec = abfd->sections;
 763   hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
 764                                        ELF32_R_SYM (rel->r_info));
 765   void **slot;
 766
 767   e.elf.indx = sec->id;
 768   e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
 769   slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
 770                                    create ? INSERT : NO_INSERT);
 771
 772   if (!slot)
 773     return NULL;
 774
 775   if (*slot)
 776     {
 777       ret = (struct elf_i386_link_hash_entry *) *slot;
 778       return &ret->elf;
 779     }
 780
 781   ret = (struct elf_i386_link_hash_entry *)
 782         objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
 783                         sizeof (struct elf_i386_link_hash_entry));
 784   if (ret)
 785     {
 786       memset (ret, 0, sizeof (*ret));
 787       ret->elf.indx = sec->id;
 788       ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
 789       ret->elf.dynindx = -1;
 790       ret->elf.plt.offset = (bfd_vma) -1;
 791       ret->elf.got.offset = (bfd_vma) -1;
 792       *slot = ret;
 793     }
 794   return &ret->elf;
 795 }
 796
 797 /* Create an i386 ELF linker hash table.  */
 798
 799 static struct bfd_link_hash_table *
 800 elf_i386_link_hash_table_create (bfd *abfd)
 801 {
 802   struct elf_i386_link_hash_table *ret;
 803   bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
 804
 805   ret = bfd_malloc (amt);
 806   if (ret == NULL)
 807     return NULL;
 808
 809   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
 810                                       elf_i386_link_hash_newfunc,
 811                                       sizeof (struct elf_i386_link_hash_entry)))
 812     {
 813       free (ret);
 814       return NULL;
 815     }
 816
 817   ret->sdynbss = NULL;
 818   ret->srelbss = NULL;
 819   ret->tls_ldm_got.refcount = 0;
 820   ret->next_tls_desc_index = 0;
 821   ret->sgotplt_jump_table_size = 0;
 822   ret->sym_sec.abfd = NULL;
 823   ret->is_vxworks = 0;
 824   ret->srelplt2 = NULL;
 825   ret->plt0_pad_byte = 0;
 826   ret->tls_module_base = NULL;
 827
 828   ret->loc_hash_table = htab_try_create (1024,
 829                                          elf_i386_local_htab_hash,
 830                                          elf_i386_local_htab_eq,
 831                                          NULL);
 832   ret->loc_hash_memory = objalloc_create ();
 833   if (!ret->loc_hash_table || !ret->loc_hash_memory)
 834     {
 835       free (ret);
 836       return NULL;
 837     }
 838
 839   return &ret->elf.root;
 840 }
 841
 842 /* Destroy an i386 ELF linker hash table.  */
 843
 844 static void
 845 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
 846 {
 847   struct elf_i386_link_hash_table *htab
 848     = (struct elf_i386_link_hash_table *) hash;
 849
 850   if (htab->loc_hash_table)
 851     htab_delete (htab->loc_hash_table);
 852   if (htab->loc_hash_memory)
 853     objalloc_free ((struct objalloc *) htab->loc_hash_memory);
 854   _bfd_generic_link_hash_table_free (hash);
 855 }
 856
 857 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
 858    .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
 859    hash table.  */
 860
 861 static bfd_boolean
 862 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
 863 {
 864   struct elf_i386_link_hash_table *htab;
 865
 866   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 867     return FALSE;
 868
 869   htab = elf_i386_hash_table (info);
 870   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 871   if (!info->shared)
 872     htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
 873
 874   if (!htab->sdynbss
 875       || (!info->shared && !htab->srelbss))
 876     abort ();
 877
 878   if (htab->is_vxworks
 879       && !elf_vxworks_create_dynamic_sections (dynobj, info,
 880                                                &htab->srelplt2))
 881     return FALSE;
 882
 883   return TRUE;
 884 }
 885
 886 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 887
 888 static void
 889 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
 890                                struct elf_link_hash_entry *dir,
 891                                struct elf_link_hash_entry *ind)
 892 {
 893   struct elf_i386_link_hash_entry *edir, *eind;
 894
 895   edir = (struct elf_i386_link_hash_entry *) dir;
 896   eind = (struct elf_i386_link_hash_entry *) ind;
 897
 898   if (eind->dyn_relocs != NULL)
 899     {
 900       if (edir->dyn_relocs != NULL)
 901         {
 902           struct elf_dyn_relocs **pp;
 903           struct elf_dyn_relocs *p;
 904
 905           /* Add reloc counts against the indirect sym to the direct sym
 906              list.  Merge any entries against the same section.  */
 907           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 908             {
 909               struct elf_dyn_relocs *q;
 910
 911               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 912                 if (q->sec == p->sec)
 913                   {
 914                     q->pc_count += p->pc_count;
 915                     q->count += p->count;
 916                     *pp = p->next;
 917                     break;
 918                   }
 919               if (q == NULL)
 920                 pp = &p->next;
 921             }
 922           *pp = edir->dyn_relocs;
 923         }
 924
 925       edir->dyn_relocs = eind->dyn_relocs;
 926       eind->dyn_relocs = NULL;
 927     }
 928
 929   if (ind->root.type == bfd_link_hash_indirect
 930       && dir->got.refcount <= 0)
 931     {
 932       edir->tls_type = eind->tls_type;
 933       eind->tls_type = GOT_UNKNOWN;
 934     }
 935
 936   if (ELIMINATE_COPY_RELOCS
 937       && ind->root.type != bfd_link_hash_indirect
 938       && dir->dynamic_adjusted)
 939     {
 940       /* If called to transfer flags for a weakdef during processing
 941          of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 942          We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 943       dir->ref_dynamic |= ind->ref_dynamic;
 944       dir->ref_regular |= ind->ref_regular;
 945       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
 946       dir->needs_plt |= ind->needs_plt;
 947       dir->pointer_equality_needed |= ind->pointer_equality_needed;
 948     }
 949   else
 950     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 951 }
 952
 953 typedef union
 954   {
 955     unsigned char c[2];
 956     uint16_t i;
 957   }
 958 i386_opcode16;
 959
 960 /* Return TRUE if the TLS access code sequence support transition
 961    from R_TYPE.  */
 962
 963 static bfd_boolean
 964 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
 965                                bfd_byte *contents,
 966                                Elf_Internal_Shdr *symtab_hdr,
 967                                struct elf_link_hash_entry **sym_hashes,
 968                                unsigned int r_type,
 969                                const Elf_Internal_Rela *rel,
 970                                const Elf_Internal_Rela *relend)
 971 {
 972   unsigned int val, type;
 973   unsigned long r_symndx;
 974   struct elf_link_hash_entry *h;
 975   bfd_vma offset;
 976
 977   /* Get the section contents.  */
 978   if (contents == NULL)
 979     {
 980       if (elf_section_data (sec)->this_hdr.contents != NULL)
 981         contents = elf_section_data (sec)->this_hdr.contents;
 982       else
 983         {
 984           /* FIXME: How to better handle error condition?  */
 985           if (!bfd_malloc_and_get_section (abfd, sec, &contents))
 986             return FALSE;
 987
 988           /* Cache the section contents for elf_link_input_bfd.  */
 989           elf_section_data (sec)->this_hdr.contents = contents;
 990         }
 991     }
 992
 993   offset = rel->r_offset;
 994   switch (r_type)
 995     {
 996     case R_386_TLS_GD:
 997     case R_386_TLS_LDM:
 998       if (offset < 2 || (rel + 1) >= relend)
 999         return FALSE;
1000
1001       type = bfd_get_8 (abfd, contents + offset - 2);
1002       if (r_type == R_386_TLS_GD)
1003         {
1004           /* Check transition from GD access model.  Only
1005                 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1006                 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1007              can transit to different access model.  */
1008           if ((offset + 10) > sec->size ||
1009               (type != 0x8d && type != 0x04))
1010             return FALSE;
1011
1012           val = bfd_get_8 (abfd, contents + offset - 1);
1013           if (type == 0x04)
1014             {
1015               /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1016               if (offset < 3)
1017                 return FALSE;
1018
1019               if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1020                 return FALSE;
1021
1022               if ((val & 0xc7) != 0x05 || val == (4 << 3))
1023                 return FALSE;
1024             }
1025           else
1026             {
1027               /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop  */
1028               if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1029                 return FALSE;
1030
1031               if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1032                 return FALSE;
1033             }
1034         }
1035       else
1036         {
1037           /* Check transition from LD access model.  Only
1038                 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1039              can transit to different access model.  */
1040           if (type != 0x8d || (offset + 9) > sec->size)
1041             return FALSE;
1042
1043           val = bfd_get_8 (abfd, contents + offset - 1);
1044           if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1045             return FALSE;
1046         }
1047
1048       if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1049         return FALSE;
1050
1051       r_symndx = ELF32_R_SYM (rel[1].r_info);
1052       if (r_symndx < symtab_hdr->sh_info)
1053         return FALSE;
1054
1055       h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1056       /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1057          may be versioned.  */
1058       return (h != NULL
1059               && h->root.root.string != NULL
1060               && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1061                   || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1062               && (strncmp (h->root.root.string, "___tls_get_addr",
1063                            15) == 0));
1064
1065     case R_386_TLS_IE:
1066       /* Check transition from IE access model:
1067                 movl foo@indntpoff(%rip), %eax
1068                 movl foo@indntpoff(%rip), %reg
1069                 addl foo@indntpoff(%rip), %reg
1070        */
1071
1072       if (offset < 1 || (offset + 4) > sec->size)
1073         return FALSE;
1074
1075       /* Check "movl foo@tpoff(%rip), %eax" first.  */
1076       val = bfd_get_8 (abfd, contents + offset - 1);
1077       if (val == 0xa1)
1078         return TRUE;
1079
1080       if (offset < 2)
1081         return FALSE;
1082
1083       /* Check movl|addl foo@tpoff(%rip), %reg.   */
1084       type = bfd_get_8 (abfd, contents + offset - 2);
1085       return ((type == 0x8b || type == 0x03)
1086               && (val & 0xc7) == 0x05);
1087
1088     case R_386_TLS_GOTIE:
1089     case R_386_TLS_IE_32:
1090       /* Check transition from {IE_32,GOTIE} access model:
1091                 subl foo@{tpoff,gontoff}(%reg1), %reg2
1092                 movl foo@{tpoff,gontoff}(%reg1), %reg2
1093                 addl foo@{tpoff,gontoff}(%reg1), %reg2
1094        */
1095
1096       if (offset < 2 || (offset + 4) > sec->size)
1097         return FALSE;
1098
1099       val = bfd_get_8 (abfd, contents + offset - 1);
1100       if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1101         return FALSE;
1102
1103       type = bfd_get_8 (abfd, contents + offset - 2);
1104       return type == 0x8b || type == 0x2b || type == 0x03;
1105
1106     case R_386_TLS_GOTDESC:
1107       /* Check transition from GDesc access model:
1108                 leal x@tlsdesc(%ebx), %eax
1109
1110          Make sure it's a leal adding ebx to a 32-bit offset
1111          into any register, although it's probably almost always
1112          going to be eax.  */
1113
1114       if (offset < 2 || (offset + 4) > sec->size)
1115         return FALSE;
1116
1117       if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1118         return FALSE;
1119
1120       val = bfd_get_8 (abfd, contents + offset - 1);
1121       return (val & 0xc7) == 0x83;
1122
1123     case R_386_TLS_DESC_CALL:
1124       /* Check transition from GDesc access model:
1125                 call *x@tlsdesc(%rax)
1126        */
1127       if (offset + 2 <= sec->size)
1128         {
1129           /* Make sure that it's a call *x@tlsdesc(%rax).  */
1130           static i386_opcode16 call = { { 0xff, 0x10 } };
1131           return bfd_get_16 (abfd, contents + offset) == call.i;
1132         }
1133
1134       return FALSE;
1135
1136     default:
1137       abort ();
1138     }
1139 }
1140
1141 /* Return TRUE if the TLS access transition is OK or no transition
1142    will be performed.  Update R_TYPE if there is a transition.  */
1143
1144 static bfd_boolean
1145 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1146                          asection *sec, bfd_byte *contents,
1147                          Elf_Internal_Shdr *symtab_hdr,
1148                          struct elf_link_hash_entry **sym_hashes,
1149                          unsigned int *r_type, int tls_type,
1150                          const Elf_Internal_Rela *rel,
1151                          const Elf_Internal_Rela *relend,
1152                          struct elf_link_hash_entry *h)
1153 {
1154   unsigned int from_type = *r_type;
1155   unsigned int to_type = from_type;
1156   bfd_boolean check = TRUE;
1157
1158   switch (from_type)
1159     {
1160     case R_386_TLS_GD:
1161     case R_386_TLS_GOTDESC:
1162     case R_386_TLS_DESC_CALL:
1163     case R_386_TLS_IE_32:
1164     case R_386_TLS_IE:
1165     case R_386_TLS_GOTIE:
1166       if (!info->shared)
1167         {
1168           if (h == NULL)
1169             to_type = R_386_TLS_LE_32;
1170           else if (from_type != R_386_TLS_IE
1171                    && from_type != R_386_TLS_GOTIE)
1172             to_type = R_386_TLS_IE_32;
1173         }
1174
1175       /* When we are called from elf_i386_relocate_section, CONTENTS
1176          isn't NULL and there may be additional transitions based on
1177          TLS_TYPE.  */
1178       if (contents != NULL)
1179         {
1180           unsigned int new_to_type = to_type;
1181
1182           if (!info->shared
1183               && h != NULL
1184               && h->dynindx == -1
1185               && (tls_type & GOT_TLS_IE))
1186             new_to_type = R_386_TLS_LE_32;
1187
1188           if (to_type == R_386_TLS_GD
1189               || to_type == R_386_TLS_GOTDESC
1190               || to_type == R_386_TLS_DESC_CALL)
1191             {
1192               if (tls_type == GOT_TLS_IE_POS)
1193                 new_to_type = R_386_TLS_GOTIE;
1194               else if (tls_type & GOT_TLS_IE)
1195                 new_to_type = R_386_TLS_IE_32;
1196             }
1197
1198           /* We checked the transition before when we were called from
1199              elf_i386_check_relocs.  We only want to check the new
1200              transition which hasn't been checked before.  */
1201           check = new_to_type != to_type && from_type == to_type;
1202           to_type = new_to_type;
1203         }
1204
1205       break;
1206
1207     case R_386_TLS_LDM:
1208       if (!info->shared)
1209         to_type = R_386_TLS_LE_32;
1210       break;
1211
1212     default:
1213       return TRUE;
1214     }
1215
1216   /* Return TRUE if there is no transition.  */
1217   if (from_type == to_type)
1218     return TRUE;
1219
1220   /* Check if the transition can be performed.  */
1221   if (check
1222       && ! elf_i386_check_tls_transition (abfd, sec, contents,
1223                                           symtab_hdr, sym_hashes,
1224                                           from_type, rel, relend))
1225     {
1226       reloc_howto_type *from, *to;
1227
1228       from = elf_i386_rtype_to_howto (abfd, from_type);
1229       to = elf_i386_rtype_to_howto (abfd, to_type);
1230
1231       (*_bfd_error_handler)
1232         (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1233            "in section `%A' failed"),
1234          abfd, sec, from->name, to->name,
1235          h ? h->root.root.string : "a local symbol",
1236          (unsigned long) rel->r_offset);
1237       bfd_set_error (bfd_error_bad_value);
1238       return FALSE;
1239     }
1240
1241   *r_type = to_type;
1242   return TRUE;
1243 }
1244
1245 /* Look through the relocs for a section during the first phase, and
1246    calculate needed space in the global offset table, procedure linkage
1247    table, and dynamic reloc sections.  */
1248
1249 static bfd_boolean
1250 elf_i386_check_relocs (bfd *abfd,
1251                        struct bfd_link_info *info,
1252                        asection *sec,
1253                        const Elf_Internal_Rela *relocs)
1254 {
1255   struct elf_i386_link_hash_table *htab;
1256   Elf_Internal_Shdr *symtab_hdr;
1257   struct elf_link_hash_entry **sym_hashes;
1258   const Elf_Internal_Rela *rel;
1259   const Elf_Internal_Rela *rel_end;
1260   asection *sreloc;
1261   Elf_Internal_Sym *isymbuf;
1262
1263   if (info->relocatable)
1264     return TRUE;
1265
1266   BFD_ASSERT (is_i386_elf (abfd));
1267
1268   htab = elf_i386_hash_table (info);
1269   symtab_hdr = &elf_symtab_hdr (abfd);
1270   isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1271   sym_hashes = elf_sym_hashes (abfd);
1272
1273   sreloc = NULL;
1274
1275   rel_end = relocs + sec->reloc_count;
1276   for (rel = relocs; rel < rel_end; rel++)
1277     {
1278       unsigned int r_type;
1279       unsigned long r_symndx;
1280       struct elf_link_hash_entry *h;
1281
1282       r_symndx = ELF32_R_SYM (rel->r_info);
1283       r_type = ELF32_R_TYPE (rel->r_info);
1284
1285       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1286         {
1287           (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1288                                  abfd,
1289                                  r_symndx);
1290           return FALSE;
1291         }
1292
1293       if (r_symndx < symtab_hdr->sh_info)
1294         {
1295           /* A local symbol.  */
1296           Elf_Internal_Sym *isym;
1297
1298           /* Read this BFD's local symbols.  */
1299           if (isymbuf == NULL)
1300             {
1301               if (isymbuf == NULL)
1302                 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1303                                                 symtab_hdr->sh_info, 0,
1304                                                 NULL, NULL, NULL);
1305               if (isymbuf == NULL)
1306                   return FALSE;
1307             }
1308
1309           /* Check relocation against local STT_GNU_IFUNC symbol.  */
1310           isym = isymbuf + r_symndx;
1311           if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1312             {
1313               h = elf_i386_get_local_sym_hash (htab, abfd, rel,
1314                                                    TRUE);
1315               if (h == NULL)
1316                 return FALSE;
1317
1318               /* Fake a STT_GNU_IFUNC symbol.  */
1319               h->type = STT_GNU_IFUNC;
1320               h->def_regular = 1;
1321               h->ref_regular = 1;
1322               h->forced_local = 1;
1323               h->root.type = bfd_link_hash_defined;
1324             }
1325           else
1326             h = NULL;
1327         }
1328       else
1329         {
1330           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1331           while (h->root.type == bfd_link_hash_indirect
1332                  || h->root.type == bfd_link_hash_warning)
1333             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1334         }
1335
1336       if (h != NULL)
1337         {
1338           /* Create the ifunc sections for static executables.  If we
1339              never see an indirect function symbol nor we are building
1340              a static executable, those sections will be empty and
1341              won't appear in output.  */
1342           switch (r_type)
1343             {
1344             default:
1345               break;
1346
1347             case R_386_32:
1348             case R_386_PC32:
1349             case R_386_PLT32:
1350             case R_386_GOT32:
1351             case R_386_GOTOFF:
1352               if (!_bfd_elf_create_ifunc_sections (abfd, info))
1353                 return FALSE;
1354               break;
1355             }
1356
1357           /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1358              it here if it is defined in a non-shared object.  */
1359           if (h->type == STT_GNU_IFUNC
1360               && h->def_regular)
1361             {
1362               /* It is referenced by a non-shared object. */
1363               h->ref_regular = 1;
1364
1365               /* STT_GNU_IFUNC symbol must go through PLT.  */
1366               h->plt.refcount += 1;
1367
1368               /* STT_GNU_IFUNC needs dynamic sections.  */
1369               if (htab->elf.dynobj == NULL)
1370                 htab->elf.dynobj = abfd;
1371
1372               switch (r_type)
1373                 {
1374                 default:
1375                   (*_bfd_error_handler)
1376                     (_("%B: relocation %s against STT_GNU_IFUNC "
1377                        "symbol `%s' isn't handled by %s"), abfd,
1378                      elf_howto_table[r_type].name,
1379                      (h->root.root.string
1380                       ? h->root.root.string : "a local symbol"),
1381                      __FUNCTION__);
1382                   bfd_set_error (bfd_error_bad_value);
1383                   return FALSE;
1384
1385                 case R_386_32:
1386                   h->non_got_ref = 1;
1387                   h->pointer_equality_needed = 1;
1388                   if (info->shared)
1389                     {
1390                       /* We must copy these reloc types into the
1391                          output file.  Create a reloc section in
1392                          dynobj and make room for this reloc.  */
1393                       sreloc = _bfd_elf_create_ifunc_dyn_reloc
1394                         (abfd, info, sec, sreloc,
1395                          &((struct elf_i386_link_hash_entry *) h)->dyn_relocs);
1396                       if (sreloc == NULL)
1397                         return FALSE;
1398                     }
1399                   break;
1400
1401                 case R_386_PC32:
1402                   h->non_got_ref = 1;
1403                   break;
1404
1405                 case R_386_PLT32:
1406                   break;
1407
1408                 case R_386_GOT32:
1409                 case R_386_GOTOFF:
1410                   h->got.refcount += 1;
1411                   if (htab->elf.sgot == NULL
1412                       && !_bfd_elf_create_got_section (htab->elf.dynobj,
1413                                                        info))
1414                     return FALSE;
1415                   break;
1416                 }
1417
1418               continue;
1419             }
1420         }
1421
1422       if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1423                                      symtab_hdr, sym_hashes,
1424                                      &r_type, GOT_UNKNOWN,
1425                                      rel, rel_end, h))
1426         return FALSE;
1427
1428       switch (r_type)
1429         {
1430         case R_386_TLS_LDM:
1431           htab->tls_ldm_got.refcount += 1;
1432           goto create_got;
1433
1434         case R_386_PLT32:
1435           /* This symbol requires a procedure linkage table entry.  We
1436              actually build the entry in adjust_dynamic_symbol,
1437              because this might be a case of linking PIC code which is
1438              never referenced by a dynamic object, in which case we
1439              don't need to generate a procedure linkage table entry
1440              after all.  */
1441
1442           /* If this is a local symbol, we resolve it directly without
1443              creating a procedure linkage table entry.  */
1444           if (h == NULL)
1445             continue;
1446
1447           h->needs_plt = 1;
1448           h->plt.refcount += 1;
1449           break;
1450
1451         case R_386_TLS_IE_32:
1452         case R_386_TLS_IE:
1453         case R_386_TLS_GOTIE:
1454           if (info->shared)
1455             info->flags |= DF_STATIC_TLS;
1456           /* Fall through */
1457
1458         case R_386_GOT32:
1459         case R_386_TLS_GD:
1460         case R_386_TLS_GOTDESC:
1461         case R_386_TLS_DESC_CALL:
1462           /* This symbol requires a global offset table entry.  */
1463           {
1464             int tls_type, old_tls_type;
1465
1466             switch (r_type)
1467               {
1468               default:
1469               case R_386_GOT32: tls_type = GOT_NORMAL; break;
1470               case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1471               case R_386_TLS_GOTDESC:
1472               case R_386_TLS_DESC_CALL:
1473                 tls_type = GOT_TLS_GDESC; break;
1474               case R_386_TLS_IE_32:
1475                 if (ELF32_R_TYPE (rel->r_info) == r_type)
1476                   tls_type = GOT_TLS_IE_NEG;
1477                 else
1478                   /* If this is a GD->IE transition, we may use either of
1479                      R_386_TLS_TPOFF and R_386_TLS_TPOFF32.  */
1480                   tls_type = GOT_TLS_IE;
1481                 break;
1482               case R_386_TLS_IE:
1483               case R_386_TLS_GOTIE:
1484                 tls_type = GOT_TLS_IE_POS; break;
1485               }
1486
1487             if (h != NULL)
1488               {
1489                 h->got.refcount += 1;
1490                 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1491               }
1492             else
1493               {
1494                 bfd_signed_vma *local_got_refcounts;
1495
1496                 /* This is a global offset table entry for a local symbol.  */
1497                 local_got_refcounts = elf_local_got_refcounts (abfd);
1498                 if (local_got_refcounts == NULL)
1499                   {
1500                     bfd_size_type size;
1501
1502                     size = symtab_hdr->sh_info;
1503                     size *= (sizeof (bfd_signed_vma)
1504                              + sizeof (bfd_vma) + sizeof(char));
1505                     local_got_refcounts = bfd_zalloc (abfd, size);
1506                     if (local_got_refcounts == NULL)
1507                       return FALSE;
1508                     elf_local_got_refcounts (abfd) = local_got_refcounts;
1509                     elf_i386_local_tlsdesc_gotent (abfd)
1510                       = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1511                     elf_i386_local_got_tls_type (abfd)
1512                       = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1513                   }
1514                 local_got_refcounts[r_symndx] += 1;
1515                 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1516               }
1517
1518             if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1519               tls_type |= old_tls_type;
1520             /* If a TLS symbol is accessed using IE at least once,
1521                there is no point to use dynamic model for it.  */
1522             else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1523                      && (! GOT_TLS_GD_ANY_P (old_tls_type)
1524                          || (tls_type & GOT_TLS_IE) == 0))
1525               {
1526                 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1527                   tls_type = old_tls_type;
1528                 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1529                          && GOT_TLS_GD_ANY_P (tls_type))
1530                   tls_type |= old_tls_type;
1531                 else
1532                   {
1533                     (*_bfd_error_handler)
1534                       (_("%B: `%s' accessed both as normal and "
1535                          "thread local symbol"),
1536                        abfd,
1537                        h ? h->root.root.string : "<local>");
1538                     return FALSE;
1539                   }
1540               }
1541
1542             if (old_tls_type != tls_type)
1543               {
1544                 if (h != NULL)
1545                   elf_i386_hash_entry (h)->tls_type = tls_type;
1546                 else
1547                   elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1548               }
1549           }
1550           /* Fall through */
1551
1552         case R_386_GOTOFF:
1553         case R_386_GOTPC:
1554         create_got:
1555           if (htab->elf.sgot == NULL)
1556             {
1557               if (htab->elf.dynobj == NULL)
1558                 htab->elf.dynobj = abfd;
1559               if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1560                 return FALSE;
1561             }
1562           if (r_type != R_386_TLS_IE)
1563             break;
1564           /* Fall through */
1565
1566         case R_386_TLS_LE_32:
1567         case R_386_TLS_LE:
1568           if (!info->shared)
1569             break;
1570           info->flags |= DF_STATIC_TLS;
1571           /* Fall through */
1572
1573         case R_386_32:
1574         case R_386_PC32:
1575           if (h != NULL && info->executable)
1576             {
1577               /* If this reloc is in a read-only section, we might
1578                  need a copy reloc.  We can't check reliably at this
1579                  stage whether the section is read-only, as input
1580                  sections have not yet been mapped to output sections.
1581                  Tentatively set the flag for now, and correct in
1582                  adjust_dynamic_symbol.  */
1583               h->non_got_ref = 1;
1584
1585               /* We may need a .plt entry if the function this reloc
1586                  refers to is in a shared lib.  */
1587               h->plt.refcount += 1;
1588               if (r_type != R_386_PC32)
1589                 h->pointer_equality_needed = 1;
1590             }
1591
1592           /* If we are creating a shared library, and this is a reloc
1593              against a global symbol, or a non PC relative reloc
1594              against a local symbol, then we need to copy the reloc
1595              into the shared library.  However, if we are linking with
1596              -Bsymbolic, we do not need to copy a reloc against a
1597              global symbol which is defined in an object we are
1598              including in the link (i.e., DEF_REGULAR is set).  At
1599              this point we have not seen all the input files, so it is
1600              possible that DEF_REGULAR is not set now but will be set
1601              later (it is never cleared).  In case of a weak definition,
1602              DEF_REGULAR may be cleared later by a strong definition in
1603              a shared library.  We account for that possibility below by
1604              storing information in the relocs_copied field of the hash
1605              table entry.  A similar situation occurs when creating
1606              shared libraries and symbol visibility changes render the
1607              symbol local.
1608
1609              If on the other hand, we are creating an executable, we
1610              may need to keep relocations for symbols satisfied by a
1611              dynamic library if we manage to avoid copy relocs for the
1612              symbol.  */
1613           if ((info->shared
1614                && (sec->flags & SEC_ALLOC) != 0
1615                && (r_type != R_386_PC32
1616                    || (h != NULL
1617                        && (! SYMBOLIC_BIND (info, h)
1618                            || h->root.type == bfd_link_hash_defweak
1619                            || !h->def_regular))))
1620               || (ELIMINATE_COPY_RELOCS
1621                   && !info->shared
1622                   && (sec->flags & SEC_ALLOC) != 0
1623                   && h != NULL
1624                   && (h->root.type == bfd_link_hash_defweak
1625                       || !h->def_regular)))
1626             {
1627               struct elf_dyn_relocs *p;
1628               struct elf_dyn_relocs **head;
1629
1630               /* We must copy these reloc types into the output file.
1631                  Create a reloc section in dynobj and make room for
1632                  this reloc.  */
1633               if (sreloc == NULL)
1634                 {
1635                   if (htab->elf.dynobj == NULL)
1636                     htab->elf.dynobj = abfd;
1637
1638                   sreloc = _bfd_elf_make_dynamic_reloc_section
1639                     (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1640
1641                   if (sreloc == NULL)
1642                     return FALSE;
1643                 }
1644
1645               /* If this is a global symbol, we count the number of
1646                  relocations we need for this symbol.  */
1647               if (h != NULL)
1648                 {
1649                   head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1650                 }
1651               else
1652                 {
1653                   void **vpp;
1654                   /* Track dynamic relocs needed for local syms too.
1655                      We really need local syms available to do this
1656                      easily.  Oh well.  */
1657
1658                   asection *s;
1659                   s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1660                                                  sec, r_symndx);
1661                   if (s == NULL)
1662                     return FALSE;
1663
1664                   vpp = &elf_section_data (s)->local_dynrel;
1665                   head = (struct elf_dyn_relocs **)vpp;
1666                 }
1667
1668               p = *head;
1669               if (p == NULL || p->sec != sec)
1670                 {
1671                   bfd_size_type amt = sizeof *p;
1672                   p = bfd_alloc (htab->elf.dynobj, amt);
1673                   if (p == NULL)
1674                     return FALSE;
1675                   p->next = *head;
1676                   *head = p;
1677                   p->sec = sec;
1678                   p->count = 0;
1679                   p->pc_count = 0;
1680                 }
1681
1682               p->count += 1;
1683               if (r_type == R_386_PC32)
1684                 p->pc_count += 1;
1685             }
1686           break;
1687
1688           /* This relocation describes the C++ object vtable hierarchy.
1689              Reconstruct it for later use during GC.  */
1690         case R_386_GNU_VTINHERIT:
1691           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1692             return FALSE;
1693           break;
1694
1695           /* This relocation describes which C++ vtable entries are actually
1696              used.  Record for later use during GC.  */
1697         case R_386_GNU_VTENTRY:
1698           BFD_ASSERT (h != NULL);
1699           if (h != NULL
1700               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1701             return FALSE;
1702           break;
1703
1704         default:
1705           break;
1706         }
1707     }
1708
1709   return TRUE;
1710 }
1711
1712 /* Return the section that should be marked against GC for a given
1713    relocation.  */
1714
1715 static asection *
1716 elf_i386_gc_mark_hook (asection *sec,
1717                        struct bfd_link_info *info,
1718                        Elf_Internal_Rela *rel,
1719                        struct elf_link_hash_entry *h,
1720                        Elf_Internal_Sym *sym)
1721 {
1722   if (h != NULL)
1723     switch (ELF32_R_TYPE (rel->r_info))
1724       {
1725       case R_386_GNU_VTINHERIT:
1726       case R_386_GNU_VTENTRY:
1727         return NULL;
1728       }
1729
1730   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1731 }
1732
1733 /* Update the got entry reference counts for the section being removed.  */
1734
1735 static bfd_boolean
1736 elf_i386_gc_sweep_hook (bfd *abfd,
1737                         struct bfd_link_info *info,
1738                         asection *sec,
1739                         const Elf_Internal_Rela *relocs)
1740 {
1741   Elf_Internal_Shdr *symtab_hdr;
1742   struct elf_link_hash_entry **sym_hashes;
1743   bfd_signed_vma *local_got_refcounts;
1744   const Elf_Internal_Rela *rel, *relend;
1745
1746   if (info->relocatable)
1747     return TRUE;
1748
1749   elf_section_data (sec)->local_dynrel = NULL;
1750
1751   symtab_hdr = &elf_symtab_hdr (abfd);
1752   sym_hashes = elf_sym_hashes (abfd);
1753   local_got_refcounts = elf_local_got_refcounts (abfd);
1754
1755   relend = relocs + sec->reloc_count;
1756   for (rel = relocs; rel < relend; rel++)
1757     {
1758       unsigned long r_symndx;
1759       unsigned int r_type;
1760       struct elf_link_hash_entry *h = NULL;
1761
1762       r_symndx = ELF32_R_SYM (rel->r_info);
1763       if (r_symndx >= symtab_hdr->sh_info)
1764         {
1765           struct elf_i386_link_hash_entry *eh;
1766           struct elf_dyn_relocs **pp;
1767           struct elf_dyn_relocs *p;
1768
1769           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1770           while (h->root.type == bfd_link_hash_indirect
1771                  || h->root.type == bfd_link_hash_warning)
1772             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1773           eh = (struct elf_i386_link_hash_entry *) h;
1774
1775           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1776             if (p->sec == sec)
1777               {
1778                 /* Everything must go for SEC.  */
1779                 *pp = p->next;
1780                 break;
1781               }
1782         }
1783
1784       r_type = ELF32_R_TYPE (rel->r_info);
1785       if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1786                                      symtab_hdr, sym_hashes,
1787                                      &r_type, GOT_UNKNOWN,
1788                                      rel, relend, h))
1789         return FALSE;
1790
1791       switch (r_type)
1792         {
1793         case R_386_TLS_LDM:
1794           if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1795             elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1796           break;
1797
1798         case R_386_TLS_GD:
1799         case R_386_TLS_GOTDESC:
1800         case R_386_TLS_DESC_CALL:
1801         case R_386_TLS_IE_32:
1802         case R_386_TLS_IE:
1803         case R_386_TLS_GOTIE:
1804         case R_386_GOT32:
1805           if (h != NULL)
1806             {
1807               if (h->got.refcount > 0)
1808                 h->got.refcount -= 1;
1809             }
1810           else if (local_got_refcounts != NULL)
1811             {
1812               if (local_got_refcounts[r_symndx] > 0)
1813                 local_got_refcounts[r_symndx] -= 1;
1814             }
1815           break;
1816
1817         case R_386_32:
1818         case R_386_PC32:
1819           if (info->shared)
1820             break;
1821           /* Fall through */
1822
1823         case R_386_PLT32:
1824           if (h != NULL)
1825             {
1826               if (h->plt.refcount > 0)
1827                 h->plt.refcount -= 1;
1828             }
1829           break;
1830
1831         default:
1832           break;
1833         }
1834     }
1835
1836   return TRUE;
1837 }
1838
1839 /* Adjust a symbol defined by a dynamic object and referenced by a
1840    regular object.  The current definition is in some section of the
1841    dynamic object, but we're not including those sections.  We have to
1842    change the definition to something the rest of the link can
1843    understand.  */
1844
1845 static bfd_boolean
1846 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1847                                 struct elf_link_hash_entry *h)
1848 {
1849   struct elf_i386_link_hash_table *htab;
1850   asection *s;
1851
1852   /* STT_GNU_IFUNC symbol must go through PLT. */
1853   if (h->type == STT_GNU_IFUNC)
1854     {
1855       if (h->plt.refcount <= 0)
1856         {
1857           h->plt.offset = (bfd_vma) -1;
1858           h->needs_plt = 0;
1859         }
1860       return TRUE;
1861     }
1862
1863   /* If this is a function, put it in the procedure linkage table.  We
1864      will fill in the contents of the procedure linkage table later,
1865      when we know the address of the .got section.  */
1866   if (h->type == STT_FUNC
1867       || h->needs_plt)
1868     {
1869       if (h->plt.refcount <= 0
1870           || SYMBOL_CALLS_LOCAL (info, h)
1871           || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1872               && h->root.type == bfd_link_hash_undefweak))
1873         {
1874           /* This case can occur if we saw a PLT32 reloc in an input
1875              file, but the symbol was never referred to by a dynamic
1876              object, or if all references were garbage collected.  In
1877              such a case, we don't actually need to build a procedure
1878              linkage table, and we can just do a PC32 reloc instead.  */
1879           h->plt.offset = (bfd_vma) -1;
1880           h->needs_plt = 0;
1881         }
1882
1883       return TRUE;
1884     }
1885   else
1886     /* It's possible that we incorrectly decided a .plt reloc was
1887        needed for an R_386_PC32 reloc to a non-function sym in
1888        check_relocs.  We can't decide accurately between function and
1889        non-function syms in check-relocs;  Objects loaded later in
1890        the link may change h->type.  So fix it now.  */
1891     h->plt.offset = (bfd_vma) -1;
1892
1893   /* If this is a weak symbol, and there is a real definition, the
1894      processor independent code will have arranged for us to see the
1895      real definition first, and we can just use the same value.  */
1896   if (h->u.weakdef != NULL)
1897     {
1898       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1899                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
1900       h->root.u.def.section = h->u.weakdef->root.u.def.section;
1901       h->root.u.def.value = h->u.weakdef->root.u.def.value;
1902       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1903         h->non_got_ref = h->u.weakdef->non_got_ref;
1904       return TRUE;
1905     }
1906
1907   /* This is a reference to a symbol defined by a dynamic object which
1908      is not a function.  */
1909
1910   /* If we are creating a shared library, we must presume that the
1911      only references to the symbol are via the global offset table.
1912      For such cases we need not do anything here; the relocations will
1913      be handled correctly by relocate_section.  */
1914   if (info->shared)
1915     return TRUE;
1916
1917   /* If there are no references to this symbol that do not use the
1918      GOT, we don't need to generate a copy reloc.  */
1919   if (!h->non_got_ref)
1920     return TRUE;
1921
1922   /* If -z nocopyreloc was given, we won't generate them either.  */
1923   if (info->nocopyreloc)
1924     {
1925       h->non_got_ref = 0;
1926       return TRUE;
1927     }
1928
1929   htab = elf_i386_hash_table (info);
1930
1931   /* If there aren't any dynamic relocs in read-only sections, then
1932      we can keep the dynamic relocs and avoid the copy reloc.  This
1933      doesn't work on VxWorks, where we can not have dynamic relocations
1934      (other than copy and jump slot relocations) in an executable.  */
1935   if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
1936     {
1937       struct elf_i386_link_hash_entry * eh;
1938       struct elf_dyn_relocs *p;
1939
1940       eh = (struct elf_i386_link_hash_entry *) h;
1941       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1942         {
1943           s = p->sec->output_section;
1944           if (s != NULL && (s->flags & SEC_READONLY) != 0)
1945             break;
1946         }
1947
1948       if (p == NULL)
1949         {
1950           h->non_got_ref = 0;
1951           return TRUE;
1952         }
1953     }
1954
1955   if (h->size == 0)
1956     {
1957       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1958                              h->root.root.string);
1959       return TRUE;
1960     }
1961
1962   /* We must allocate the symbol in our .dynbss section, which will
1963      become part of the .bss section of the executable.  There will be
1964      an entry for this symbol in the .dynsym section.  The dynamic
1965      object will contain position independent code, so all references
1966      from the dynamic object to this symbol will go through the global
1967      offset table.  The dynamic linker will use the .dynsym entry to
1968      determine the address it must put in the global offset table, so
1969      both the dynamic object and the regular object will refer to the
1970      same memory location for the variable.  */
1971
1972   /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1973      copy the initial value out of the dynamic object and into the
1974      runtime process image.  */
1975   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1976     {
1977       htab->srelbss->size += sizeof (Elf32_External_Rel);
1978       h->needs_copy = 1;
1979     }
1980
1981   s = htab->sdynbss;
1982
1983   return _bfd_elf_adjust_dynamic_copy (h, s);
1984 }
1985
1986 /* Allocate space in .plt, .got and associated reloc sections for
1987    dynamic relocs.  */
1988
1989 static bfd_boolean
1990 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1991 {
1992   struct bfd_link_info *info;
1993   struct elf_i386_link_hash_table *htab;
1994   struct elf_i386_link_hash_entry *eh;
1995   struct elf_dyn_relocs *p;
1996
1997   if (h->root.type == bfd_link_hash_indirect)
1998     return TRUE;
1999
2000   if (h->root.type == bfd_link_hash_warning)
2001     /* When warning symbols are created, they **replace** the "real"
2002        entry in the hash table, thus we never get to see the real
2003        symbol in a hash traversal.  So look at it now.  */
2004     h = (struct elf_link_hash_entry *) h->root.u.i.link;
2005   eh = (struct elf_i386_link_hash_entry *) h;
2006
2007   info = (struct bfd_link_info *) inf;
2008   htab = elf_i386_hash_table (info);
2009
2010   /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2011      here if it is defined and referenced in a non-shared object.  */
2012   if (h->type == STT_GNU_IFUNC
2013       && h->def_regular)
2014     return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2015                                                &eh->dyn_relocs,
2016                                                PLT_ENTRY_SIZE, 4);
2017   else if (htab->elf.dynamic_sections_created
2018            && h->plt.refcount > 0)
2019     {
2020       /* Make sure this symbol is output as a dynamic symbol.
2021          Undefined weak syms won't yet be marked as dynamic.  */
2022       if (h->dynindx == -1
2023           && !h->forced_local)
2024         {
2025           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2026             return FALSE;
2027         }
2028
2029       if (info->shared
2030           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2031         {
2032           asection *s = htab->elf.splt;
2033
2034           /* If this is the first .plt entry, make room for the special
2035              first entry.  */
2036           if (s->size == 0)
2037             s->size += PLT_ENTRY_SIZE;
2038
2039           h->plt.offset = s->size;
2040
2041           /* If this symbol is not defined in a regular file, and we are
2042              not generating a shared library, then set the symbol to this
2043              location in the .plt.  This is required to make function
2044              pointers compare as equal between the normal executable and
2045              the shared library.  */
2046           if (! info->shared
2047               && !h->def_regular)
2048             {
2049               h->root.u.def.section = s;
2050               h->root.u.def.value = h->plt.offset;
2051             }
2052
2053           /* Make room for this entry.  */
2054           s->size += PLT_ENTRY_SIZE;
2055
2056           /* We also need to make an entry in the .got.plt section, which
2057              will be placed in the .got section by the linker script.  */
2058           htab->elf.sgotplt->size += 4;
2059
2060           /* We also need to make an entry in the .rel.plt section.  */
2061           htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2062           htab->next_tls_desc_index++;
2063
2064           if (htab->is_vxworks && !info->shared)
2065             {
2066               /* VxWorks has a second set of relocations for each PLT entry
2067                  in executables.  They go in a separate relocation section,
2068                  which is processed by the kernel loader.  */
2069
2070               /* There are two relocations for the initial PLT entry: an
2071                  R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2072                  R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8.  */
2073
2074               if (h->plt.offset == PLT_ENTRY_SIZE)
2075                 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2076
2077               /* There are two extra relocations for each subsequent PLT entry:
2078                  an R_386_32 relocation for the GOT entry, and an R_386_32
2079                  relocation for the PLT entry.  */
2080
2081               htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2082             }
2083         }
2084       else
2085         {
2086           h->plt.offset = (bfd_vma) -1;
2087           h->needs_plt = 0;
2088         }
2089     }
2090   else
2091     {
2092       h->plt.offset = (bfd_vma) -1;
2093       h->needs_plt = 0;
2094     }
2095
2096   eh->tlsdesc_got = (bfd_vma) -1;
2097
2098   /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2099      make it a R_386_TLS_LE_32 requiring no TLS entry.  */
2100   if (h->got.refcount > 0
2101       && !info->shared
2102       && h->dynindx == -1
2103       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2104     h->got.offset = (bfd_vma) -1;
2105   else if (h->got.refcount > 0)
2106     {
2107       asection *s;
2108       bfd_boolean dyn;
2109       int tls_type = elf_i386_hash_entry(h)->tls_type;
2110
2111       /* Make sure this symbol is output as a dynamic symbol.
2112          Undefined weak syms won't yet be marked as dynamic.  */
2113       if (h->dynindx == -1
2114           && !h->forced_local)
2115         {
2116           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2117             return FALSE;
2118         }
2119
2120       s = htab->elf.sgot;
2121       if (GOT_TLS_GDESC_P (tls_type))
2122         {
2123           eh->tlsdesc_got = htab->elf.sgotplt->size
2124             - elf_i386_compute_jump_table_size (htab);
2125           htab->elf.sgotplt->size += 8;
2126           h->got.offset = (bfd_vma) -2;
2127         }
2128       if (! GOT_TLS_GDESC_P (tls_type)
2129           || GOT_TLS_GD_P (tls_type))
2130         {
2131           h->got.offset = s->size;
2132           s->size += 4;
2133           /* R_386_TLS_GD needs 2 consecutive GOT slots.  */
2134           if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2135             s->size += 4;
2136         }
2137       dyn = htab->elf.dynamic_sections_created;
2138       /* R_386_TLS_IE_32 needs one dynamic relocation,
2139          R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2140          (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2141          need two), R_386_TLS_GD needs one if local symbol and two if
2142          global.  */
2143       if (tls_type == GOT_TLS_IE_BOTH)
2144         htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2145       else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2146                || (tls_type & GOT_TLS_IE))
2147         htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2148       else if (GOT_TLS_GD_P (tls_type))
2149         htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2150       else if (! GOT_TLS_GDESC_P (tls_type)
2151                && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2152                    || h->root.type != bfd_link_hash_undefweak)
2153                && (info->shared
2154                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2155         htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2156       if (GOT_TLS_GDESC_P (tls_type))
2157         htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2158     }
2159   else
2160     h->got.offset = (bfd_vma) -1;
2161
2162   if (eh->dyn_relocs == NULL)
2163     return TRUE;
2164
2165   /* In the shared -Bsymbolic case, discard space allocated for
2166      dynamic pc-relative relocs against symbols which turn out to be
2167      defined in regular objects.  For the normal shared case, discard
2168      space for pc-relative relocs that have become local due to symbol
2169      visibility changes.  */
2170
2171   if (info->shared)
2172     {
2173       /* The only reloc that uses pc_count is R_386_PC32, which will
2174          appear on a call or on something like ".long foo - .".  We
2175          want calls to protected symbols to resolve directly to the
2176          function rather than going via the plt.  If people want
2177          function pointer comparisons to work as expected then they
2178          should avoid writing assembly like ".long foo - .".  */
2179       if (SYMBOL_CALLS_LOCAL (info, h))
2180         {
2181           struct elf_dyn_relocs **pp;
2182
2183           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2184             {
2185               p->count -= p->pc_count;
2186               p->pc_count = 0;
2187               if (p->count == 0)
2188                 *pp = p->next;
2189               else
2190                 pp = &p->next;
2191             }
2192         }
2193
2194       if (htab->is_vxworks)
2195         {
2196           struct elf_dyn_relocs **pp;
2197           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2198             {
2199               if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2200                 *pp = p->next;
2201               else
2202                 pp = &p->next;
2203             }
2204         }
2205
2206       /* Also discard relocs on undefined weak syms with non-default
2207          visibility.  */
2208       if (eh->dyn_relocs != NULL
2209           && h->root.type == bfd_link_hash_undefweak)
2210         {
2211           if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2212             eh->dyn_relocs = NULL;
2213
2214           /* Make sure undefined weak symbols are output as a dynamic
2215              symbol in PIEs.  */
2216           else if (h->dynindx == -1
2217                    && !h->forced_local)
2218             {
2219               if (! bfd_elf_link_record_dynamic_symbol (info, h))
2220                 return FALSE;
2221             }
2222         }
2223     }
2224   else if (ELIMINATE_COPY_RELOCS)
2225     {
2226       /* For the non-shared case, discard space for relocs against
2227          symbols which turn out to need copy relocs or are not
2228          dynamic.  */
2229
2230       if (!h->non_got_ref
2231           && ((h->def_dynamic
2232                && !h->def_regular)
2233               || (htab->elf.dynamic_sections_created
2234                   && (h->root.type == bfd_link_hash_undefweak
2235                       || h->root.type == bfd_link_hash_undefined))))
2236         {
2237           /* Make sure this symbol is output as a dynamic symbol.
2238              Undefined weak syms won't yet be marked as dynamic.  */
2239           if (h->dynindx == -1
2240               && !h->forced_local)
2241             {
2242               if (! bfd_elf_link_record_dynamic_symbol (info, h))
2243                 return FALSE;
2244             }
2245
2246           /* If that succeeded, we know we'll be keeping all the
2247              relocs.  */
2248           if (h->dynindx != -1)
2249             goto keep;
2250         }
2251
2252       eh->dyn_relocs = NULL;
2253
2254     keep: ;
2255     }
2256
2257   /* Finally, allocate space.  */
2258   for (p = eh->dyn_relocs; p != NULL; p = p->next)
2259     {
2260       asection *sreloc;
2261
2262       sreloc = elf_section_data (p->sec)->sreloc;
2263
2264       BFD_ASSERT (sreloc != NULL);
2265       sreloc->size += p->count * sizeof (Elf32_External_Rel);
2266     }
2267
2268   return TRUE;
2269 }
2270
2271 /* Allocate space in .plt, .got and associated reloc sections for
2272    local dynamic relocs.  */
2273
2274 static bfd_boolean
2275 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2276 {
2277   struct elf_link_hash_entry *h
2278     = (struct elf_link_hash_entry *) *slot;
2279
2280   if (h->type != STT_GNU_IFUNC
2281       || !h->def_regular
2282       || !h->ref_regular
2283       || !h->forced_local
2284       || h->root.type != bfd_link_hash_defined)
2285     abort ();
2286
2287   return elf_i386_allocate_dynrelocs (h, inf);
2288 }
2289
2290 /* Find any dynamic relocs that apply to read-only sections.  */
2291
2292 static bfd_boolean
2293 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2294 {
2295   struct elf_i386_link_hash_entry *eh;
2296   struct elf_dyn_relocs *p;
2297
2298   if (h->root.type == bfd_link_hash_warning)
2299     h = (struct elf_link_hash_entry *) h->root.u.i.link;
2300
2301   eh = (struct elf_i386_link_hash_entry *) h;
2302   for (p = eh->dyn_relocs; p != NULL; p = p->next)
2303     {
2304       asection *s = p->sec->output_section;
2305
2306       if (s != NULL && (s->flags & SEC_READONLY) != 0)
2307         {
2308           struct bfd_link_info *info = (struct bfd_link_info *) inf;
2309
2310           info->flags |= DF_TEXTREL;
2311
2312           /* Not an error, just cut short the traversal.  */
2313           return FALSE;
2314         }
2315     }
2316   return TRUE;
2317 }
2318
2319 /* Set the sizes of the dynamic sections.  */
2320
2321 static bfd_boolean
2322 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2323                                 struct bfd_link_info *info)
2324 {
2325   struct elf_i386_link_hash_table *htab;
2326   bfd *dynobj;
2327   asection *s;
2328   bfd_boolean relocs;
2329   bfd *ibfd;
2330
2331   htab = elf_i386_hash_table (info);
2332   dynobj = htab->elf.dynobj;
2333   if (dynobj == NULL)
2334     abort ();
2335
2336   if (htab->elf.dynamic_sections_created)
2337     {
2338       /* Set the contents of the .interp section to the interpreter.  */
2339       if (info->executable)
2340         {
2341           s = bfd_get_section_by_name (dynobj, ".interp");
2342           if (s == NULL)
2343             abort ();
2344           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2345           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2346         }
2347     }
2348
2349   /* Set up .got offsets for local syms, and space for local dynamic
2350      relocs.  */
2351   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2352     {
2353       bfd_signed_vma *local_got;
2354       bfd_signed_vma *end_local_got;
2355       char *local_tls_type;
2356       bfd_vma *local_tlsdesc_gotent;
2357       bfd_size_type locsymcount;
2358       Elf_Internal_Shdr *symtab_hdr;
2359       asection *srel;
2360
2361       if (! is_i386_elf (ibfd))
2362         continue;
2363
2364       for (s = ibfd->sections; s != NULL; s = s->next)
2365         {
2366           struct elf_dyn_relocs *p;
2367
2368           for (p = ((struct elf_dyn_relocs *)
2369                      elf_section_data (s)->local_dynrel);
2370                p != NULL;
2371                p = p->next)
2372             {
2373               if (!bfd_is_abs_section (p->sec)
2374                   && bfd_is_abs_section (p->sec->output_section))
2375                 {
2376                   /* Input section has been discarded, either because
2377                      it is a copy of a linkonce section or due to
2378                      linker script /DISCARD/, so we'll be discarding
2379                      the relocs too.  */
2380                 }
2381               else if (htab->is_vxworks
2382                        && strcmp (p->sec->output_section->name,
2383                                   ".tls_vars") == 0)
2384                 {
2385                   /* Relocations in vxworks .tls_vars sections are
2386                      handled specially by the loader.  */
2387                 }
2388               else if (p->count != 0)
2389                 {
2390                   srel = elf_section_data (p->sec)->sreloc;
2391                   srel->size += p->count * sizeof (Elf32_External_Rel);
2392                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2393                     info->flags |= DF_TEXTREL;
2394                 }
2395             }
2396         }
2397
2398       local_got = elf_local_got_refcounts (ibfd);
2399       if (!local_got)
2400         continue;
2401
2402       symtab_hdr = &elf_symtab_hdr (ibfd);
2403       locsymcount = symtab_hdr->sh_info;
2404       end_local_got = local_got + locsymcount;
2405       local_tls_type = elf_i386_local_got_tls_type (ibfd);
2406       local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2407       s = htab->elf.sgot;
2408       srel = htab->elf.srelgot;
2409       for (; local_got < end_local_got;
2410            ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2411         {
2412           *local_tlsdesc_gotent = (bfd_vma) -1;
2413           if (*local_got > 0)
2414             {
2415               if (GOT_TLS_GDESC_P (*local_tls_type))
2416                 {
2417                   *local_tlsdesc_gotent = htab->elf.sgotplt->size
2418                     - elf_i386_compute_jump_table_size (htab);
2419                   htab->elf.sgotplt->size += 8;
2420                   *local_got = (bfd_vma) -2;
2421                 }
2422               if (! GOT_TLS_GDESC_P (*local_tls_type)
2423                   || GOT_TLS_GD_P (*local_tls_type))
2424                 {
2425                   *local_got = s->size;
2426                   s->size += 4;
2427                   if (GOT_TLS_GD_P (*local_tls_type)
2428                       || *local_tls_type == GOT_TLS_IE_BOTH)
2429                     s->size += 4;
2430                 }
2431               if (info->shared
2432                   || GOT_TLS_GD_ANY_P (*local_tls_type)
2433                   || (*local_tls_type & GOT_TLS_IE))
2434                 {
2435                   if (*local_tls_type == GOT_TLS_IE_BOTH)
2436                     srel->size += 2 * sizeof (Elf32_External_Rel);
2437                   else if (GOT_TLS_GD_P (*local_tls_type)
2438                            || ! GOT_TLS_GDESC_P (*local_tls_type))
2439                     srel->size += sizeof (Elf32_External_Rel);
2440                   if (GOT_TLS_GDESC_P (*local_tls_type))
2441                     htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2442                 }
2443             }
2444           else
2445             *local_got = (bfd_vma) -1;
2446         }
2447     }
2448
2449   if (htab->tls_ldm_got.refcount > 0)
2450     {
2451       /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2452          relocs.  */
2453       htab->tls_ldm_got.offset = htab->elf.sgot->size;
2454       htab->elf.sgot->size += 8;
2455       htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2456     }
2457   else
2458     htab->tls_ldm_got.offset = -1;
2459
2460   /* Allocate global sym .plt and .got entries, and space for global
2461      sym dynamic relocs.  */
2462   elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2463
2464   /* Allocate .plt and .got entries, and space for local symbols.  */
2465   htab_traverse (htab->loc_hash_table,
2466                  elf_i386_allocate_local_dynrelocs,
2467                  info);
2468
2469   /* For every jump slot reserved in the sgotplt, reloc_count is
2470      incremented.  However, when we reserve space for TLS descriptors,
2471      it's not incremented, so in order to compute the space reserved
2472      for them, it suffices to multiply the reloc count by the jump
2473      slot size.  */
2474   if (htab->elf.srelplt)
2475     htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2476
2477   /* We now have determined the sizes of the various dynamic sections.
2478      Allocate memory for them.  */
2479   relocs = FALSE;
2480   for (s = dynobj->sections; s != NULL; s = s->next)
2481     {
2482       bfd_boolean strip_section = TRUE;
2483
2484       if ((s->flags & SEC_LINKER_CREATED) == 0)
2485         continue;
2486
2487       if (s == htab->elf.splt
2488           || s == htab->elf.sgot
2489           || s == htab->elf.sgotplt
2490           || s == htab->elf.iplt
2491           || s == htab->elf.igotplt
2492           || s == htab->sdynbss)
2493         {
2494           /* Strip this section if we don't need it; see the
2495              comment below.  */
2496           /* We'd like to strip these sections if they aren't needed, but if
2497              we've exported dynamic symbols from them we must leave them.
2498              It's too late to tell BFD to get rid of the symbols.  */
2499
2500           if (htab->elf.hplt != NULL)
2501             strip_section = FALSE;
2502         }
2503       else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2504         {
2505           if (s->size != 0
2506               && s != htab->elf.srelplt
2507               && s != htab->srelplt2)
2508             relocs = TRUE;
2509
2510           /* We use the reloc_count field as a counter if we need
2511              to copy relocs into the output file.  */
2512           s->reloc_count = 0;
2513         }
2514       else
2515         {
2516           /* It's not one of our sections, so don't allocate space.  */
2517           continue;
2518         }
2519
2520       if (s->size == 0)
2521         {
2522           /* If we don't need this section, strip it from the
2523              output file.  This is mostly to handle .rel.bss and
2524              .rel.plt.  We must create both sections in
2525              create_dynamic_sections, because they must be created
2526              before the linker maps input sections to output
2527              sections.  The linker does that before
2528              adjust_dynamic_symbol is called, and it is that
2529              function which decides whether anything needs to go
2530              into these sections.  */
2531           if (strip_section)
2532             s->flags |= SEC_EXCLUDE;
2533           continue;
2534         }
2535
2536       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2537         continue;
2538
2539       /* Allocate memory for the section contents.  We use bfd_zalloc
2540          here in case unused entries are not reclaimed before the
2541          section's contents are written out.  This should not happen,
2542          but this way if it does, we get a R_386_NONE reloc instead
2543          of garbage.  */
2544       s->contents = bfd_zalloc (dynobj, s->size);
2545       if (s->contents == NULL)
2546         return FALSE;
2547     }
2548
2549   if (htab->elf.dynamic_sections_created)
2550     {
2551       /* Add some entries to the .dynamic section.  We fill in the
2552          values later, in elf_i386_finish_dynamic_sections, but we
2553          must add the entries now so that we get the correct size for
2554          the .dynamic section.  The DT_DEBUG entry is filled in by the
2555          dynamic linker and used by the debugger.  */
2556 #define add_dynamic_entry(TAG, VAL) \
2557   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2558
2559       if (info->executable)
2560         {
2561           if (!add_dynamic_entry (DT_DEBUG, 0))
2562             return FALSE;
2563         }
2564
2565       if (htab->elf.splt->size != 0)
2566         {
2567           if (!add_dynamic_entry (DT_PLTGOT, 0)
2568               || !add_dynamic_entry (DT_PLTRELSZ, 0)
2569               || !add_dynamic_entry (DT_PLTREL, DT_REL)
2570               || !add_dynamic_entry (DT_JMPREL, 0))
2571             return FALSE;
2572         }
2573
2574       if (relocs)
2575         {
2576           if (!add_dynamic_entry (DT_REL, 0)
2577               || !add_dynamic_entry (DT_RELSZ, 0)
2578               || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2579             return FALSE;
2580
2581           /* If any dynamic relocs apply to a read-only section,
2582              then we need a DT_TEXTREL entry.  */
2583           if ((info->flags & DF_TEXTREL) == 0)
2584             elf_link_hash_traverse (&htab->elf,
2585                                     elf_i386_readonly_dynrelocs, info);
2586
2587           if ((info->flags & DF_TEXTREL) != 0)
2588             {
2589               if (!add_dynamic_entry (DT_TEXTREL, 0))
2590                 return FALSE;
2591             }
2592         }
2593       if (htab->is_vxworks
2594           && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2595         return FALSE;
2596     }
2597 #undef add_dynamic_entry
2598
2599   return TRUE;
2600 }
2601
2602 static bfd_boolean
2603 elf_i386_always_size_sections (bfd *output_bfd,
2604                                struct bfd_link_info *info)
2605 {
2606   asection *tls_sec = elf_hash_table (info)->tls_sec;
2607
2608   if (tls_sec)
2609     {
2610       struct elf_link_hash_entry *tlsbase;
2611
2612       tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2613                                       "_TLS_MODULE_BASE_",
2614                                       FALSE, FALSE, FALSE);
2615
2616       if (tlsbase && tlsbase->type == STT_TLS)
2617         {
2618           struct bfd_link_hash_entry *bh = NULL;
2619           const struct elf_backend_data *bed
2620             = get_elf_backend_data (output_bfd);
2621
2622           if (!(_bfd_generic_link_add_one_symbol
2623                 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2624                  tls_sec, 0, NULL, FALSE,
2625                  bed->collect, &bh)))
2626             return FALSE;
2627
2628           elf_i386_hash_table (info)->tls_module_base = bh;
2629
2630           tlsbase = (struct elf_link_hash_entry *)bh;
2631           tlsbase->def_regular = 1;
2632           tlsbase->other = STV_HIDDEN;
2633           (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2634         }
2635     }
2636
2637   return TRUE;
2638 }
2639
2640 /* Set the correct type for an x86 ELF section.  We do this by the
2641    section name, which is a hack, but ought to work.  */
2642
2643 static bfd_boolean
2644 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2645                         Elf_Internal_Shdr *hdr,
2646                         asection *sec)
2647 {
2648   register const char *name;
2649
2650   name = bfd_get_section_name (abfd, sec);
2651
2652   /* This is an ugly, but unfortunately necessary hack that is
2653      needed when producing EFI binaries on x86. It tells
2654      elf.c:elf_fake_sections() not to consider ".reloc" as a section
2655      containing ELF relocation info.  We need this hack in order to
2656      be able to generate ELF binaries that can be translated into
2657      EFI applications (which are essentially COFF objects).  Those
2658      files contain a COFF ".reloc" section inside an ELFNN object,
2659      which would normally cause BFD to segfault because it would
2660      attempt to interpret this section as containing relocation
2661      entries for section "oc".  With this hack enabled, ".reloc"
2662      will be treated as a normal data section, which will avoid the
2663      segfault.  However, you won't be able to create an ELFNN binary
2664      with a section named "oc" that needs relocations, but that's
2665      the kind of ugly side-effects you get when detecting section
2666      types based on their names...  In practice, this limitation is
2667      unlikely to bite.  */
2668   if (strcmp (name, ".reloc") == 0)
2669     hdr->sh_type = SHT_PROGBITS;
2670
2671   return TRUE;
2672 }
2673
2674 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2675    executables.  Rather than setting it to the beginning of the TLS
2676    section, we have to set it to the end.    This function may be called
2677    multiple times, it is idempotent.  */
2678
2679 static void
2680 elf_i386_set_tls_module_base (struct bfd_link_info *info)
2681 {
2682   struct bfd_link_hash_entry *base;
2683
2684   if (!info->executable)
2685     return;
2686
2687   base = elf_i386_hash_table (info)->tls_module_base;
2688
2689   if (!base)
2690     return;
2691
2692   base->u.def.value = elf_hash_table (info)->tls_size;
2693 }
2694
2695 /* Return the base VMA address which should be subtracted from real addresses
2696    when resolving @dtpoff relocation.
2697    This is PT_TLS segment p_vaddr.  */
2698
2699 static bfd_vma
2700 elf_i386_dtpoff_base (struct bfd_link_info *info)
2701 {
2702   /* If tls_sec is NULL, we should have signalled an error already.  */
2703   if (elf_hash_table (info)->tls_sec == NULL)
2704     return 0;
2705   return elf_hash_table (info)->tls_sec->vma;
2706 }
2707
2708 /* Return the relocation value for @tpoff relocation
2709    if STT_TLS virtual address is ADDRESS.  */
2710
2711 static bfd_vma
2712 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2713 {
2714   struct elf_link_hash_table *htab = elf_hash_table (info);
2715
2716   /* If tls_sec is NULL, we should have signalled an error already.  */
2717   if (htab->tls_sec == NULL)
2718     return 0;
2719   return htab->tls_size + htab->tls_sec->vma - address;
2720 }
2721
2722 /* Relocate an i386 ELF section.  */
2723
2724 static bfd_boolean
2725 elf_i386_relocate_section (bfd *output_bfd,
2726                            struct bfd_link_info *info,
2727                            bfd *input_bfd,
2728                            asection *input_section,
2729                            bfd_byte *contents,
2730                            Elf_Internal_Rela *relocs,
2731                            Elf_Internal_Sym *local_syms,
2732                            asection **local_sections)
2733 {
2734   struct elf_i386_link_hash_table *htab;
2735   Elf_Internal_Shdr *symtab_hdr;
2736   struct elf_link_hash_entry **sym_hashes;
2737   bfd_vma *local_got_offsets;
2738   bfd_vma *local_tlsdesc_gotents;
2739   Elf_Internal_Rela *rel;
2740   Elf_Internal_Rela *relend;
2741   bfd_boolean is_vxworks_tls;
2742
2743   BFD_ASSERT (is_i386_elf (input_bfd));
2744
2745   htab = elf_i386_hash_table (info);
2746   symtab_hdr = &elf_symtab_hdr (input_bfd);
2747   sym_hashes = elf_sym_hashes (input_bfd);
2748   local_got_offsets = elf_local_got_offsets (input_bfd);
2749   local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2750   /* We have to handle relocations in vxworks .tls_vars sections
2751      specially, because the dynamic loader is 'weird'.  */
2752   is_vxworks_tls = (htab->is_vxworks && info->shared
2753                     && !strcmp (input_section->output_section->name,
2754                                 ".tls_vars"));
2755
2756   elf_i386_set_tls_module_base (info);
2757
2758   rel = relocs;
2759   relend = relocs + input_section->reloc_count;
2760   for (; rel < relend; rel++)
2761     {
2762       unsigned int r_type;
2763       reloc_howto_type *howto;
2764       unsigned long r_symndx;
2765       struct elf_link_hash_entry *h;
2766       Elf_Internal_Sym *sym;
2767       asection *sec;
2768       bfd_vma off, offplt;
2769       bfd_vma relocation;
2770       bfd_boolean unresolved_reloc;
2771       bfd_reloc_status_type r;
2772       unsigned int indx;
2773       int tls_type;
2774
2775       r_type = ELF32_R_TYPE (rel->r_info);
2776       if (r_type == R_386_GNU_VTINHERIT
2777           || r_type == R_386_GNU_VTENTRY)
2778         continue;
2779
2780       if ((indx = r_type) >= R_386_standard
2781           && ((indx = r_type - R_386_ext_offset) - R_386_standard
2782               >= R_386_ext - R_386_standard)
2783           && ((indx = r_type - R_386_tls_offset) - R_386_ext
2784               >= R_386_irelative - R_386_ext))
2785         {
2786           (*_bfd_error_handler)
2787             (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2788              input_bfd, input_section, r_type);
2789           bfd_set_error (bfd_error_bad_value);
2790           return FALSE;
2791         }
2792       howto = elf_howto_table + indx;
2793
2794       r_symndx = ELF32_R_SYM (rel->r_info);
2795       h = NULL;
2796       sym = NULL;
2797       sec = NULL;
2798       unresolved_reloc = FALSE;
2799       if (r_symndx < symtab_hdr->sh_info)
2800         {
2801           sym = local_syms + r_symndx;
2802           sec = local_sections[r_symndx];
2803           relocation = (sec->output_section->vma
2804                         + sec->output_offset
2805                         + sym->st_value);
2806
2807           if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2808               && ((sec->flags & SEC_MERGE) != 0
2809                   || (info->relocatable
2810                       && sec->output_offset != 0)))
2811             {
2812               bfd_vma addend;
2813               bfd_byte *where = contents + rel->r_offset;
2814
2815               switch (howto->size)
2816                 {
2817                 case 0:
2818                   addend = bfd_get_8 (input_bfd, where);
2819                   if (howto->pc_relative)
2820                     {
2821                       addend = (addend ^ 0x80) - 0x80;
2822                       addend += 1;
2823                     }
2824                   break;
2825                 case 1:
2826                   addend = bfd_get_16 (input_bfd, where);
2827                   if (howto->pc_relative)
2828                     {
2829                       addend = (addend ^ 0x8000) - 0x8000;
2830                       addend += 2;
2831                     }
2832                   break;
2833                 case 2:
2834                   addend = bfd_get_32 (input_bfd, where);
2835                   if (howto->pc_relative)
2836                     {
2837                       addend = (addend ^ 0x80000000) - 0x80000000;
2838                       addend += 4;
2839                     }
2840                   break;
2841                 default:
2842                   abort ();
2843                 }
2844
2845               if (info->relocatable)
2846                 addend += sec->output_offset;
2847               else
2848                 {
2849                   asection *msec = sec;
2850                   addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2851                                                    addend);
2852                   addend -= relocation;
2853                   addend += msec->output_section->vma + msec->output_offset;
2854                 }
2855
2856               switch (howto->size)
2857                 {
2858                 case 0:
2859                   /* FIXME: overflow checks.  */
2860                   if (howto->pc_relative)
2861                     addend -= 1;
2862                   bfd_put_8 (input_bfd, addend, where);
2863                   break;
2864                 case 1:
2865                   if (howto->pc_relative)
2866                     addend -= 2;
2867                   bfd_put_16 (input_bfd, addend, where);
2868                   break;
2869                 case 2:
2870                   if (howto->pc_relative)
2871                     addend -= 4;
2872                   bfd_put_32 (input_bfd, addend, where);
2873                   break;
2874                 }
2875             }
2876           else if (ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2877             {
2878               /* Relocate against local STT_GNU_IFUNC symbol.  */
2879               h = elf_i386_get_local_sym_hash (htab, input_bfd,
2880                                                    rel, FALSE);
2881               if (h == NULL)
2882                 abort ();
2883
2884               /* Set STT_GNU_IFUNC symbol value.  */
2885               h->root.u.def.value = sym->st_value;
2886               h->root.u.def.section = sec;
2887             }
2888         }
2889       else
2890         {
2891           bfd_boolean warned;
2892
2893           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2894                                    r_symndx, symtab_hdr, sym_hashes,
2895                                    h, sec, relocation,
2896                                    unresolved_reloc, warned);
2897         }
2898
2899       if (sec != NULL && elf_discarded_section (sec))
2900         {
2901           /* For relocs against symbols from removed linkonce sections,
2902              or sections discarded by a linker script, we just want the
2903              section contents zeroed.  Avoid any special processing.  */
2904           _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2905           rel->r_info = 0;
2906           rel->r_addend = 0;
2907           continue;
2908         }
2909
2910       if (info->relocatable)
2911         continue;
2912
2913       /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2914          it here if it is defined in a non-shared object.  */
2915       if (h != NULL
2916           && h->type == STT_GNU_IFUNC
2917           && h->def_regular)
2918         {
2919           asection *plt, *gotplt, *base_got;
2920           bfd_vma plt_index;
2921
2922           if ((input_section->flags & SEC_ALLOC) == 0
2923               || h->plt.offset == (bfd_vma) -1)
2924             abort ();
2925
2926           /* STT_GNU_IFUNC symbol must go through PLT.  */
2927           if (htab->elf.splt != NULL)
2928             {
2929               plt = htab->elf.splt;
2930               gotplt = htab->elf.sgotplt;
2931             }
2932           else
2933             {
2934               plt = htab->elf.iplt;
2935               gotplt = htab->elf.igotplt;
2936             }
2937
2938           relocation = (plt->output_section->vma
2939                         + plt->output_offset + h->plt.offset);
2940
2941           switch (r_type)
2942             {
2943             default:
2944               (*_bfd_error_handler)
2945                 (_("%B: relocation %s against STT_GNU_IFUNC "
2946                    "symbol `%s' isn't handled by %s"), input_bfd,
2947                  elf_howto_table[r_type].name,
2948                  (h->root.root.string
2949                   ? h->root.root.string : "a local symbol"),
2950                  __FUNCTION__);
2951               bfd_set_error (bfd_error_bad_value);
2952               return FALSE;
2953
2954             case R_386_32:
2955               /* Generate dynamic relcoation only when there is a
2956                  non-GOF reference in a shared object.  */
2957               if (info->shared && h->non_got_ref)
2958                 {
2959                   Elf_Internal_Rela outrel;
2960                   bfd_byte *loc;
2961                   asection *sreloc;
2962                   bfd_vma offset;
2963
2964                   /* Need a dynamic relocation to get the real function
2965                      adddress.  */
2966                   offset = _bfd_elf_section_offset (output_bfd,
2967                                                     info,
2968                                                     input_section,
2969                                                     rel->r_offset);
2970                   if (offset == (bfd_vma) -1
2971                       || offset == (bfd_vma) -2)
2972                     abort ();
2973
2974                   outrel.r_offset = (input_section->output_section->vma
2975                                      + input_section->output_offset
2976                                      + offset);
2977
2978                   if (h->dynindx == -1
2979                       || h->forced_local
2980                       || info->executable)
2981                     {
2982                       /* This symbol is resolved locally.  */
2983                       outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2984                       bfd_put_32 (output_bfd,
2985                                   (h->root.u.def.value
2986                                    + h->root.u.def.section->output_section->vma
2987                                    + h->root.u.def.section->output_offset),
2988                                   contents + offset);
2989                     }
2990                   else
2991                     outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2992
2993                   sreloc = htab->elf.irelifunc;
2994                   loc = sreloc->contents;
2995                   loc += (sreloc->reloc_count++
2996                           * sizeof (Elf32_External_Rel));
2997                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2998
2999                   /* If this reloc is against an external symbol, we
3000                      do not want to fiddle with the addend.  Otherwise,
3001                      we need to include the symbol value so that it
3002                      becomes an addend for the dynamic reloc.  For an
3003                      internal symbol, we have updated addend.  */
3004                   continue;
3005                 }
3006
3007             case R_386_PC32:
3008             case R_386_PLT32:
3009               goto do_relocation;
3010
3011             case R_386_GOT32:
3012               base_got = htab->elf.sgot;
3013               off = h->got.offset;
3014
3015               if (base_got == NULL)
3016                 abort ();
3017
3018               if (off == (bfd_vma) -1)
3019                 {
3020                   /* We can't use h->got.offset here to save state, or
3021                      even just remember the offset, as finish_dynamic_symbol
3022                      would use that as offset into .got.  */
3023
3024                   if (htab->elf.splt != NULL)
3025                     {
3026                       plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3027                       off = (plt_index + 3) * 4;
3028                       base_got = htab->elf.sgotplt;
3029                     }
3030                   else
3031                     {
3032                       plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3033                       off = plt_index * 4;
3034                       base_got = htab->elf.igotplt;
3035                     }
3036
3037                   if (h->dynindx == -1
3038                       || h->forced_local
3039                       || info->symbolic)
3040                     {
3041                       /* This references the local defitionion.  We must
3042                          initialize this entry in the global offset table.
3043                          Since the offset must always be a multiple of 8,
3044                          we use the least significant bit to record
3045                          whether we have initialized it already.
3046
3047                          When doing a dynamic link, we create a .rela.got
3048                          relocation entry to initialize the value.  This
3049                          is done in the finish_dynamic_symbol routine.   */
3050                       if ((off & 1) != 0)
3051                         off &= ~1;
3052                       else
3053                         {
3054                           bfd_put_32 (output_bfd, relocation,
3055                                       base_got->contents + off);
3056                           h->got.offset |= 1;
3057                         }
3058                     }
3059
3060                   relocation = off;
3061
3062                   /* Adjust for static executables.  */
3063                   if (htab->elf.splt == NULL)
3064                     relocation += gotplt->output_offset;
3065                 }
3066               else
3067                 {
3068                   relocation = (base_got->output_section->vma
3069                                 + base_got->output_offset + off
3070                                 - gotplt->output_section->vma
3071                                 - gotplt->output_offset);
3072                   /* Adjust for static executables.  */
3073                   if (htab->elf.splt == NULL)
3074                     relocation += gotplt->output_offset;
3075                 }
3076
3077               goto do_relocation;
3078
3079             case R_386_GOTOFF:
3080               relocation -= (gotplt->output_section->vma
3081                              + gotplt->output_offset);
3082               goto do_relocation;
3083             }
3084         }
3085
3086       switch (r_type)
3087         {
3088         case R_386_GOT32:
3089           /* Relocation is to the entry for this symbol in the global
3090              offset table.  */
3091           if (htab->elf.sgot == NULL)
3092             abort ();
3093
3094           if (h != NULL)
3095             {
3096               bfd_boolean dyn;
3097
3098               off = h->got.offset;
3099               dyn = htab->elf.dynamic_sections_created;
3100               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3101                   || (info->shared
3102                       && SYMBOL_REFERENCES_LOCAL (info, h))
3103                   || (ELF_ST_VISIBILITY (h->other)
3104                       && h->root.type == bfd_link_hash_undefweak))
3105                 {
3106                   /* This is actually a static link, or it is a
3107                      -Bsymbolic link and the symbol is defined
3108                      locally, or the symbol was forced to be local
3109                      because of a version file.  We must initialize
3110                      this entry in the global offset table.  Since the
3111                      offset must always be a multiple of 4, we use the
3112                      least significant bit to record whether we have
3113                      initialized it already.
3114
3115                      When doing a dynamic link, we create a .rel.got
3116                      relocation entry to initialize the value.  This
3117                      is done in the finish_dynamic_symbol routine.  */
3118                   if ((off & 1) != 0)
3119                     off &= ~1;
3120                   else
3121                     {
3122                       bfd_put_32 (output_bfd, relocation,
3123                                   htab->elf.sgot->contents + off);
3124                       h->got.offset |= 1;
3125                     }
3126                 }
3127               else
3128                 unresolved_reloc = FALSE;
3129             }
3130           else
3131             {
3132               if (local_got_offsets == NULL)
3133                 abort ();
3134
3135               off = local_got_offsets[r_symndx];
3136
3137               /* The offset must always be a multiple of 4.  We use
3138                  the least significant bit to record whether we have
3139                  already generated the necessary reloc.  */
3140               if ((off & 1) != 0)
3141                 off &= ~1;
3142               else
3143                 {
3144                   bfd_put_32 (output_bfd, relocation,
3145                               htab->elf.sgot->contents + off);
3146
3147                   if (info->shared)
3148                     {
3149                       asection *s;
3150                       Elf_Internal_Rela outrel;
3151                       bfd_byte *loc;
3152
3153                       s = htab->elf.srelgot;
3154                       if (s == NULL)
3155                         abort ();
3156
3157                       outrel.r_offset = (htab->elf.sgot->output_section->vma
3158                                          + htab->elf.sgot->output_offset
3159                                          + off);
3160                       outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3161                       loc = s->contents;
3162                       loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
3163                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3164                     }
3165
3166                   local_got_offsets[r_symndx] |= 1;
3167                 }
3168             }
3169
3170           if (off >= (bfd_vma) -2)
3171             abort ();
3172
3173           relocation = htab->elf.sgot->output_section->vma
3174                        + htab->elf.sgot->output_offset + off
3175                        - htab->elf.sgotplt->output_section->vma
3176                        - htab->elf.sgotplt->output_offset;
3177           break;
3178
3179         case R_386_GOTOFF:
3180           /* Relocation is relative to the start of the global offset
3181              table.  */
3182
3183           /* Check to make sure it isn't a protected function symbol
3184              for shared library since it may not be local when used
3185              as function address.  We also need to make sure that a
3186              symbol is defined locally.  */
3187           if (info->shared && h)
3188             {
3189               if (!h->def_regular)
3190                 {
3191                   const char *v;
3192
3193                   switch (ELF_ST_VISIBILITY (h->other))
3194                     {
3195                     case STV_HIDDEN:
3196                       v = _("hidden symbol");
3197                       break;
3198                     case STV_INTERNAL:
3199                       v = _("internal symbol");
3200                       break;
3201                     case STV_PROTECTED:
3202                       v = _("protected symbol");
3203                       break;
3204                     default:
3205                       v = _("symbol");
3206                       break;
3207                     }
3208
3209                   (*_bfd_error_handler)
3210                     (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3211                      input_bfd, v, h->root.root.string);
3212                   bfd_set_error (bfd_error_bad_value);
3213                   return FALSE;
3214                 }
3215               else if (!info->executable
3216                        && h->type == STT_FUNC
3217                        && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3218                 {
3219                   (*_bfd_error_handler)
3220                     (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3221                      input_bfd, h->root.root.string);
3222                   bfd_set_error (bfd_error_bad_value);
3223                   return FALSE;
3224                 }
3225             }
3226
3227           /* Note that sgot is not involved in this
3228              calculation.  We always want the start of .got.plt.  If we
3229              defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3230              permitted by the ABI, we might have to change this
3231              calculation.  */
3232           relocation -= htab->elf.sgotplt->output_section->vma
3233                         + htab->elf.sgotplt->output_offset;
3234           break;
3235
3236         case R_386_GOTPC:
3237           /* Use global offset table as symbol value.  */
3238           relocation = htab->elf.sgotplt->output_section->vma
3239                        + htab->elf.sgotplt->output_offset;
3240           unresolved_reloc = FALSE;
3241           break;
3242
3243         case R_386_PLT32:
3244           /* Relocation is to the entry for this symbol in the
3245              procedure linkage table.  */
3246
3247           /* Resolve a PLT32 reloc against a local symbol directly,
3248              without using the procedure linkage table.  */
3249           if (h == NULL)
3250             break;
3251
3252           if (h->plt.offset == (bfd_vma) -1
3253               || htab->elf.splt == NULL)
3254             {
3255               /* We didn't make a PLT entry for this symbol.  This
3256                  happens when statically linking PIC code, or when
3257                  using -Bsymbolic.  */
3258               break;
3259             }
3260
3261           relocation = (htab->elf.splt->output_section->vma
3262                         + htab->elf.splt->output_offset
3263                         + h->plt.offset);
3264           unresolved_reloc = FALSE;
3265           break;
3266
3267         case R_386_32:
3268         case R_386_PC32:
3269           if ((input_section->flags & SEC_ALLOC) == 0
3270               || is_vxworks_tls)
3271             break;
3272
3273           if ((info->shared
3274                && (h == NULL
3275                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3276                    || h->root.type != bfd_link_hash_undefweak)
3277                && (r_type != R_386_PC32
3278                    || !SYMBOL_CALLS_LOCAL (info, h)))
3279               || (ELIMINATE_COPY_RELOCS
3280                   && !info->shared
3281                   && h != NULL
3282                   && h->dynindx != -1
3283                   && !h->non_got_ref
3284                   && ((h->def_dynamic
3285                        && !h->def_regular)
3286                       || h->root.type == bfd_link_hash_undefweak
3287                       || h->root.type == bfd_link_hash_undefined)))
3288             {
3289               Elf_Internal_Rela outrel;
3290               bfd_byte *loc;
3291               bfd_boolean skip, relocate;
3292               asection *sreloc;
3293
3294               /* When generating a shared object, these relocations
3295                  are copied into the output file to be resolved at run
3296                  time.  */
3297
3298               skip = FALSE;
3299               relocate = FALSE;
3300
3301               outrel.r_offset =
3302                 _bfd_elf_section_offset (output_bfd, info, input_section,
3303                                          rel->r_offset);
3304               if (outrel.r_offset == (bfd_vma) -1)
3305                 skip = TRUE;
3306               else if (outrel.r_offset == (bfd_vma) -2)
3307                 skip = TRUE, relocate = TRUE;
3308               outrel.r_offset += (input_section->output_section->vma
3309                                   + input_section->output_offset);
3310
3311               if (skip)
3312                 memset (&outrel, 0, sizeof outrel);
3313               else if (h != NULL
3314                        && h->dynindx != -1
3315                        && (r_type == R_386_PC32
3316                            || !info->shared
3317                            || !SYMBOLIC_BIND (info, h)
3318                            || !h->def_regular))
3319                 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3320               else
3321                 {
3322                   /* This symbol is local, or marked to become local.  */
3323                   relocate = TRUE;
3324                   outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3325                 }
3326
3327               sreloc = elf_section_data (input_section)->sreloc;
3328
3329               BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
3330
3331               loc = sreloc->contents;
3332               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3333
3334               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3335
3336               /* If this reloc is against an external symbol, we do
3337                  not want to fiddle with the addend.  Otherwise, we
3338                  need to include the symbol value so that it becomes
3339                  an addend for the dynamic reloc.  */
3340               if (! relocate)
3341                 continue;
3342             }
3343           break;
3344
3345         case R_386_TLS_IE:
3346           if (info->shared)
3347             {
3348               Elf_Internal_Rela outrel;
3349               bfd_byte *loc;
3350               asection *sreloc;
3351
3352               outrel.r_offset = rel->r_offset
3353                                 + input_section->output_section->vma
3354                                 + input_section->output_offset;
3355               outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3356               sreloc = elf_section_data (input_section)->sreloc;
3357               if (sreloc == NULL)
3358                 abort ();
3359               loc = sreloc->contents;
3360               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3361               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3362             }
3363           /* Fall through */
3364
3365         case R_386_TLS_GD:
3366         case R_386_TLS_GOTDESC:
3367         case R_386_TLS_DESC_CALL:
3368         case R_386_TLS_IE_32:
3369         case R_386_TLS_GOTIE:
3370           tls_type = GOT_UNKNOWN;
3371           if (h == NULL && local_got_offsets)
3372             tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3373           else if (h != NULL)
3374             tls_type = elf_i386_hash_entry(h)->tls_type;
3375           if (tls_type == GOT_TLS_IE)
3376             tls_type = GOT_TLS_IE_NEG;
3377
3378           if (! elf_i386_tls_transition (info, input_bfd,
3379                                          input_section, contents,
3380                                          symtab_hdr, sym_hashes,
3381                                          &r_type, tls_type, rel,
3382                                          relend, h))
3383             return FALSE;
3384
3385           if (r_type == R_386_TLS_LE_32)
3386             {
3387               BFD_ASSERT (! unresolved_reloc);
3388               if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3389                 {
3390                   unsigned int type;
3391                   bfd_vma roff;
3392
3393                   /* GD->LE transition.  */
3394                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3395                   if (type == 0x04)
3396                     {
3397                       /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3398                          Change it into:
3399                          movl %gs:0, %eax; subl $foo@tpoff, %eax
3400                          (6 byte form of subl).  */
3401                       memcpy (contents + rel->r_offset - 3,
3402                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3403                       roff = rel->r_offset + 5;
3404                     }
3405                   else
3406                     {
3407                       /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3408                          Change it into:
3409                          movl %gs:0, %eax; subl $foo@tpoff, %eax
3410                          (6 byte form of subl).  */
3411                       memcpy (contents + rel->r_offset - 2,
3412                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3413                       roff = rel->r_offset + 6;
3414                     }
3415                   bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3416                               contents + roff);
3417                   /* Skip R_386_PC32/R_386_PLT32.  */
3418                   rel++;
3419                   continue;
3420                 }
3421               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3422                 {
3423                   /* GDesc -> LE transition.
3424                      It's originally something like:
3425                      leal x@tlsdesc(%ebx), %eax
3426
3427                      leal x@ntpoff, %eax
3428
3429                      Registers other than %eax may be set up here.  */
3430
3431                   unsigned int val;
3432                   bfd_vma roff;
3433
3434                   roff = rel->r_offset;
3435                   val = bfd_get_8 (input_bfd, contents + roff - 1);
3436
3437                   /* Now modify the instruction as appropriate.  */
3438                   /* aoliva FIXME: remove the above and xor the byte
3439                      below with 0x86.  */
3440                   bfd_put_8 (output_bfd, val ^ 0x86,
3441                              contents + roff - 1);
3442                   bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3443                               contents + roff);
3444                   continue;
3445                 }
3446               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3447                 {
3448                   /* GDesc -> LE transition.
3449                      It's originally:
3450                      call *(%eax)
3451                      Turn it into:
3452                      xchg %ax,%ax  */
3453
3454                   bfd_vma roff;
3455
3456                   roff = rel->r_offset;
3457                   bfd_put_8 (output_bfd, 0x66, contents + roff);
3458                   bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3459                   continue;
3460                 }
3461               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3462                 {
3463                   unsigned int val;
3464
3465                   /* IE->LE transition:
3466                      Originally it can be one of:
3467                      movl foo, %eax
3468                      movl foo, %reg
3469                      addl foo, %reg
3470                      We change it into:
3471                      movl $foo, %eax
3472                      movl $foo, %reg
3473                      addl $foo, %reg.  */
3474                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3475                   if (val == 0xa1)
3476                     {
3477                       /* movl foo, %eax.  */
3478                       bfd_put_8 (output_bfd, 0xb8,
3479                                  contents + rel->r_offset - 1);
3480                     }
3481                   else
3482                     {
3483                       unsigned int type;
3484
3485                       type = bfd_get_8 (input_bfd,
3486                                         contents + rel->r_offset - 2);
3487                       switch (type)
3488                         {
3489                         case 0x8b:
3490                           /* movl */
3491                           bfd_put_8 (output_bfd, 0xc7,
3492                                      contents + rel->r_offset - 2);
3493                           bfd_put_8 (output_bfd,
3494                                      0xc0 | ((val >> 3) & 7),
3495                                      contents + rel->r_offset - 1);
3496                           break;
3497                         case 0x03:
3498                           /* addl */
3499                           bfd_put_8 (output_bfd, 0x81,
3500                                      contents + rel->r_offset - 2);
3501                           bfd_put_8 (output_bfd,
3502                                      0xc0 | ((val >> 3) & 7),
3503                                      contents + rel->r_offset - 1);
3504                           break;
3505                         default:
3506                           BFD_FAIL ();
3507                           break;
3508                         }
3509                     }
3510                   bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3511                               contents + rel->r_offset);
3512                   continue;
3513                 }
3514               else
3515                 {
3516                   unsigned int val, type;
3517
3518                   /* {IE_32,GOTIE}->LE transition:
3519                      Originally it can be one of:
3520                      subl foo(%reg1), %reg2
3521                      movl foo(%reg1), %reg2
3522                      addl foo(%reg1), %reg2
3523                      We change it into:
3524                      subl $foo, %reg2
3525                      movl $foo, %reg2 (6 byte form)
3526                      addl $foo, %reg2.  */
3527                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3528                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3529                   if (type == 0x8b)
3530                     {
3531                       /* movl */
3532                       bfd_put_8 (output_bfd, 0xc7,
3533                                  contents + rel->r_offset - 2);
3534                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3535                                  contents + rel->r_offset - 1);
3536                     }
3537                   else if (type == 0x2b)
3538                     {
3539                       /* subl */
3540                       bfd_put_8 (output_bfd, 0x81,
3541                                  contents + rel->r_offset - 2);
3542                       bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3543                                  contents + rel->r_offset - 1);
3544                     }
3545                   else if (type == 0x03)
3546                     {
3547                       /* addl */
3548                       bfd_put_8 (output_bfd, 0x81,
3549                                  contents + rel->r_offset - 2);
3550                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3551                                  contents + rel->r_offset - 1);
3552                     }
3553                   else
3554                     BFD_FAIL ();
3555                   if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3556                     bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3557                                 contents + rel->r_offset);
3558                   else
3559                     bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3560                                 contents + rel->r_offset);
3561                   continue;
3562                 }
3563             }
3564
3565           if (htab->elf.sgot == NULL)
3566             abort ();
3567
3568           if (h != NULL)
3569             {
3570               off = h->got.offset;
3571               offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3572             }
3573           else
3574             {
3575               if (local_got_offsets == NULL)
3576                 abort ();
3577
3578               off = local_got_offsets[r_symndx];
3579               offplt = local_tlsdesc_gotents[r_symndx];
3580             }
3581
3582           if ((off & 1) != 0)
3583             off &= ~1;
3584           else
3585             {
3586               Elf_Internal_Rela outrel;
3587               bfd_byte *loc;
3588               int dr_type, indx;
3589               asection *sreloc;
3590
3591               if (htab->elf.srelgot == NULL)
3592                 abort ();
3593
3594               indx = h && h->dynindx != -1 ? h->dynindx : 0;
3595
3596               if (GOT_TLS_GDESC_P (tls_type))
3597                 {
3598                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3599                   BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3600                               <= htab->elf.sgotplt->size);
3601                   outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3602                                      + htab->elf.sgotplt->output_offset
3603                                      + offplt
3604                                      + htab->sgotplt_jump_table_size);
3605                   sreloc = htab->elf.srelplt;
3606                   loc = sreloc->contents;
3607                   loc += (htab->next_tls_desc_index++
3608                           * sizeof (Elf32_External_Rel));
3609                   BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3610                               <= sreloc->contents + sreloc->size);
3611                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3612                   if (indx == 0)
3613                     {
3614                       BFD_ASSERT (! unresolved_reloc);
3615                       bfd_put_32 (output_bfd,
3616                                   relocation - elf_i386_dtpoff_base (info),
3617                                   htab->elf.sgotplt->contents + offplt
3618                                   + htab->sgotplt_jump_table_size + 4);
3619                     }
3620                   else
3621                     {
3622                       bfd_put_32 (output_bfd, 0,
3623                                   htab->elf.sgotplt->contents + offplt
3624                                   + htab->sgotplt_jump_table_size + 4);
3625                     }
3626                 }
3627
3628               sreloc = htab->elf.srelgot;
3629
3630               outrel.r_offset = (htab->elf.sgot->output_section->vma
3631                                  + htab->elf.sgot->output_offset + off);
3632
3633               if (GOT_TLS_GD_P (tls_type))
3634                 dr_type = R_386_TLS_DTPMOD32;
3635               else if (GOT_TLS_GDESC_P (tls_type))
3636                 goto dr_done;
3637               else if (tls_type == GOT_TLS_IE_POS)
3638                 dr_type = R_386_TLS_TPOFF;
3639               else
3640                 dr_type = R_386_TLS_TPOFF32;
3641
3642               if (dr_type == R_386_TLS_TPOFF && indx == 0)
3643                 bfd_put_32 (output_bfd,
3644                             relocation - elf_i386_dtpoff_base (info),
3645                             htab->elf.sgot->contents + off);
3646               else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3647                 bfd_put_32 (output_bfd,
3648                             elf_i386_dtpoff_base (info) - relocation,
3649                             htab->elf.sgot->contents + off);
3650               else if (dr_type != R_386_TLS_DESC)
3651                 bfd_put_32 (output_bfd, 0,
3652                             htab->elf.sgot->contents + off);
3653               outrel.r_info = ELF32_R_INFO (indx, dr_type);
3654
3655               loc = sreloc->contents;
3656               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3657               BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3658                           <= sreloc->contents + sreloc->size);
3659               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3660
3661               if (GOT_TLS_GD_P (tls_type))
3662                 {
3663                   if (indx == 0)
3664                     {
3665                       BFD_ASSERT (! unresolved_reloc);
3666                       bfd_put_32 (output_bfd,
3667                                   relocation - elf_i386_dtpoff_base (info),
3668                                   htab->elf.sgot->contents + off + 4);
3669                     }
3670                   else
3671                     {
3672                       bfd_put_32 (output_bfd, 0,
3673                                   htab->elf.sgot->contents + off + 4);
3674                       outrel.r_info = ELF32_R_INFO (indx,
3675                                                     R_386_TLS_DTPOFF32);
3676                       outrel.r_offset += 4;
3677                       sreloc->reloc_count++;
3678                       loc += sizeof (Elf32_External_Rel);
3679                       BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3680                                   <= sreloc->contents + sreloc->size);
3681                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3682                     }
3683                 }
3684               else if (tls_type == GOT_TLS_IE_BOTH)
3685                 {
3686                   bfd_put_32 (output_bfd,
3687                               (indx == 0
3688                                ? relocation - elf_i386_dtpoff_base (info)
3689                                : 0),
3690                               htab->elf.sgot->contents + off + 4);
3691                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3692                   outrel.r_offset += 4;
3693                   sreloc->reloc_count++;
3694                   loc += sizeof (Elf32_External_Rel);
3695                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3696                 }
3697
3698             dr_done:
3699               if (h != NULL)
3700                 h->got.offset |= 1;
3701               else
3702                 local_got_offsets[r_symndx] |= 1;
3703             }
3704
3705           if (off >= (bfd_vma) -2
3706               && ! GOT_TLS_GDESC_P (tls_type))
3707             abort ();
3708           if (r_type == R_386_TLS_GOTDESC
3709               || r_type == R_386_TLS_DESC_CALL)
3710             {
3711               relocation = htab->sgotplt_jump_table_size + offplt;
3712               unresolved_reloc = FALSE;
3713             }
3714           else if (r_type == ELF32_R_TYPE (rel->r_info))
3715             {
3716               bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3717                               + htab->elf.sgotplt->output_offset;
3718               relocation = htab->elf.sgot->output_section->vma
3719                 + htab->elf.sgot->output_offset + off - g_o_t;
3720               if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3721                   && tls_type == GOT_TLS_IE_BOTH)
3722                 relocation += 4;
3723               if (r_type == R_386_TLS_IE)
3724                 relocation += g_o_t;
3725               unresolved_reloc = FALSE;
3726             }
3727           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3728             {
3729               unsigned int val, type;
3730               bfd_vma roff;
3731
3732               /* GD->IE transition.  */
3733               type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3734               val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3735               if (type == 0x04)
3736                 {
3737                   /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3738                      Change it into:
3739                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
3740                   val >>= 3;
3741                   roff = rel->r_offset - 3;
3742                 }
3743               else
3744                 {
3745                   /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3746                      Change it into:
3747                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
3748                   roff = rel->r_offset - 2;
3749                 }
3750               memcpy (contents + roff,
3751                       "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3752               contents[roff + 7] = 0x80 | (val & 7);
3753               /* If foo is used only with foo@gotntpoff(%reg) and
3754                  foo@indntpoff, but not with foo@gottpoff(%reg), change
3755                  subl $foo@gottpoff(%reg), %eax
3756                  into:
3757                  addl $foo@gotntpoff(%reg), %eax.  */
3758               if (tls_type == GOT_TLS_IE_POS)
3759                 contents[roff + 6] = 0x03;
3760               bfd_put_32 (output_bfd,
3761                           htab->elf.sgot->output_section->vma
3762                           + htab->elf.sgot->output_offset + off
3763                           - htab->elf.sgotplt->output_section->vma
3764                           - htab->elf.sgotplt->output_offset,
3765                           contents + roff + 8);
3766               /* Skip R_386_PLT32.  */
3767               rel++;
3768               continue;
3769             }
3770           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3771             {
3772               /* GDesc -> IE transition.
3773                  It's originally something like:
3774                  leal x@tlsdesc(%ebx), %eax
3775
3776                  Change it to:
3777                  movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3778                  or:
3779                  movl x@gottpoff(%ebx), %eax # before negl %eax
3780
3781                  Registers other than %eax may be set up here.  */
3782
3783               bfd_vma roff;
3784
3785               /* First, make sure it's a leal adding ebx to a 32-bit
3786                  offset into any register, although it's probably
3787                  almost always going to be eax.  */
3788               roff = rel->r_offset;
3789
3790               /* Now modify the instruction as appropriate.  */
3791               /* To turn a leal into a movl in the form we use it, it
3792                  suffices to change the first byte from 0x8d to 0x8b.
3793                  aoliva FIXME: should we decide to keep the leal, all
3794                  we have to do is remove the statement below, and
3795                  adjust the relaxation of R_386_TLS_DESC_CALL.  */
3796               bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3797
3798               if (tls_type == GOT_TLS_IE_BOTH)
3799                 off += 4;
3800
3801               bfd_put_32 (output_bfd,
3802                           htab->elf.sgot->output_section->vma
3803                           + htab->elf.sgot->output_offset + off
3804                           - htab->elf.sgotplt->output_section->vma
3805                           - htab->elf.sgotplt->output_offset,
3806                           contents + roff);
3807               continue;
3808             }
3809           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3810             {
3811               /* GDesc -> IE transition.
3812                  It's originally:
3813                  call *(%eax)
3814
3815                  Change it to:
3816                  xchg %ax,%ax
3817                  or
3818                  negl %eax
3819                  depending on how we transformed the TLS_GOTDESC above.
3820               */
3821
3822               bfd_vma roff;
3823
3824               roff = rel->r_offset;
3825
3826               /* Now modify the instruction as appropriate.  */
3827               if (tls_type != GOT_TLS_IE_NEG)
3828                 {
3829                   /* xchg %ax,%ax */
3830                   bfd_put_8 (output_bfd, 0x66, contents + roff);
3831                   bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3832                 }
3833               else
3834                 {
3835                   /* negl %eax */
3836                   bfd_put_8 (output_bfd, 0xf7, contents + roff);
3837                   bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3838                 }
3839
3840               continue;
3841             }
3842           else
3843             BFD_ASSERT (FALSE);
3844           break;
3845
3846         case R_386_TLS_LDM:
3847           if (! elf_i386_tls_transition (info, input_bfd,
3848                                          input_section, contents,
3849                                          symtab_hdr, sym_hashes,
3850                                          &r_type, GOT_UNKNOWN, rel,
3851                                          relend, h))
3852             return FALSE;
3853
3854           if (r_type != R_386_TLS_LDM)
3855             {
3856               /* LD->LE transition:
3857                  leal foo(%reg), %eax; call ___tls_get_addr.
3858                  We change it into:
3859                  movl %gs:0, %eax; nop; leal 0(%esi,1), %esi.  */
3860               BFD_ASSERT (r_type == R_386_TLS_LE_32);
3861               memcpy (contents + rel->r_offset - 2,
3862                       "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3863               /* Skip R_386_PC32/R_386_PLT32.  */
3864               rel++;
3865               continue;
3866             }
3867
3868           if (htab->elf.sgot == NULL)
3869             abort ();
3870
3871           off = htab->tls_ldm_got.offset;
3872           if (off & 1)
3873             off &= ~1;
3874           else
3875             {
3876               Elf_Internal_Rela outrel;
3877               bfd_byte *loc;
3878
3879               if (htab->elf.srelgot == NULL)
3880                 abort ();
3881
3882               outrel.r_offset = (htab->elf.sgot->output_section->vma
3883                                  + htab->elf.sgot->output_offset + off);
3884
3885               bfd_put_32 (output_bfd, 0,
3886                           htab->elf.sgot->contents + off);
3887               bfd_put_32 (output_bfd, 0,
3888                           htab->elf.sgot->contents + off + 4);
3889               outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3890               loc = htab->elf.srelgot->contents;
3891               loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3892               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3893               htab->tls_ldm_got.offset |= 1;
3894             }
3895           relocation = htab->elf.sgot->output_section->vma
3896                        + htab->elf.sgot->output_offset + off
3897                        - htab->elf.sgotplt->output_section->vma
3898                        - htab->elf.sgotplt->output_offset;
3899           unresolved_reloc = FALSE;
3900           break;
3901
3902         case R_386_TLS_LDO_32:
3903           if (info->shared || (input_section->flags & SEC_CODE) == 0)
3904             relocation -= elf_i386_dtpoff_base (info);
3905           else
3906             /* When converting LDO to LE, we must negate.  */
3907             relocation = -elf_i386_tpoff (info, relocation);
3908           break;
3909
3910         case R_386_TLS_LE_32:
3911         case R_386_TLS_LE:
3912           if (info->shared)
3913             {
3914               Elf_Internal_Rela outrel;
3915               asection *sreloc;
3916               bfd_byte *loc;
3917               int indx;
3918
3919               outrel.r_offset = rel->r_offset
3920                                 + input_section->output_section->vma
3921                                 + input_section->output_offset;
3922               if (h != NULL && h->dynindx != -1)
3923                 indx = h->dynindx;
3924               else
3925                 indx = 0;
3926               if (r_type == R_386_TLS_LE_32)
3927                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3928               else
3929                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3930               sreloc = elf_section_data (input_section)->sreloc;
3931               if (sreloc == NULL)
3932                 abort ();
3933               loc = sreloc->contents;
3934               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3935               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3936               if (indx)
3937                 continue;
3938               else if (r_type == R_386_TLS_LE_32)
3939                 relocation = elf_i386_dtpoff_base (info) - relocation;
3940               else
3941                 relocation -= elf_i386_dtpoff_base (info);
3942             }
3943           else if (r_type == R_386_TLS_LE_32)
3944             relocation = elf_i386_tpoff (info, relocation);
3945           else
3946             relocation = -elf_i386_tpoff (info, relocation);
3947           break;
3948
3949         default:
3950           break;
3951         }
3952
3953       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3954          because such sections are not SEC_ALLOC and thus ld.so will
3955          not process them.  */
3956       if (unresolved_reloc
3957           && !((input_section->flags & SEC_DEBUGGING) != 0
3958                && h->def_dynamic))
3959         {
3960           (*_bfd_error_handler)
3961             (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3962              input_bfd,
3963              input_section,
3964              (long) rel->r_offset,
3965              howto->name,
3966              h->root.root.string);
3967           return FALSE;
3968         }
3969
3970 do_relocation:
3971       r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3972                                     contents, rel->r_offset,
3973                                     relocation, 0);
3974
3975       if (r != bfd_reloc_ok)
3976         {
3977           const char *name;
3978
3979           if (h != NULL)
3980             name = h->root.root.string;
3981           else
3982             {
3983               name = bfd_elf_string_from_elf_section (input_bfd,
3984                                                       symtab_hdr->sh_link,
3985                                                       sym->st_name);
3986               if (name == NULL)
3987                 return FALSE;
3988               if (*name == '\0')
3989                 name = bfd_section_name (input_bfd, sec);
3990             }
3991
3992           if (r == bfd_reloc_overflow)
3993             {
3994               if (! ((*info->callbacks->reloc_overflow)
3995                      (info, (h ? &h->root : NULL), name, howto->name,
3996                       (bfd_vma) 0, input_bfd, input_section,
3997                       rel->r_offset)))
3998                 return FALSE;
3999             }
4000           else
4001             {
4002               (*_bfd_error_handler)
4003                 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4004                  input_bfd, input_section,
4005                  (long) rel->r_offset, name, (int) r);
4006               return FALSE;
4007             }
4008         }
4009     }
4010
4011   return TRUE;
4012 }
4013
4014 /* Finish up dynamic symbol handling.  We set the contents of various
4015    dynamic sections here.  */
4016
4017 static bfd_boolean
4018 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4019                                 struct bfd_link_info *info,
4020                                 struct elf_link_hash_entry *h,
4021                                 Elf_Internal_Sym *sym)
4022 {
4023   struct elf_i386_link_hash_table *htab;
4024
4025   htab = elf_i386_hash_table (info);
4026
4027   if (h->plt.offset != (bfd_vma) -1)
4028     {
4029       bfd_vma plt_index;
4030       bfd_vma got_offset;
4031       Elf_Internal_Rela rel;
4032       bfd_byte *loc;
4033       asection *plt, *gotplt, *relplt;
4034
4035       /* When building a static executable, use .iplt, .igot.plt and
4036          .rel.iplt sections for STT_GNU_IFUNC symbols.  */
4037       if (htab->elf.splt != NULL)
4038         {
4039           plt = htab->elf.splt;
4040           gotplt = htab->elf.sgotplt;
4041           relplt = htab->elf.srelplt;
4042         }
4043       else
4044         {
4045           plt = htab->elf.iplt;
4046           gotplt = htab->elf.igotplt;
4047           relplt = htab->elf.irelplt;
4048         }
4049
4050       /* This symbol has an entry in the procedure linkage table.  Set
4051          it up.  */
4052
4053       if ((h->dynindx == -1
4054            && !((h->forced_local || info->executable)
4055                 && h->def_regular
4056                 && h->type == STT_GNU_IFUNC))
4057           || plt == NULL
4058           || gotplt == NULL
4059           || relplt == NULL)
4060         abort ();
4061
4062       /* Get the index in the procedure linkage table which
4063          corresponds to this symbol.  This is the index of this symbol
4064          in all the symbols for which we are making plt entries.  The
4065          first entry in the procedure linkage table is reserved.
4066
4067          Get the offset into the .got table of the entry that
4068          corresponds to this function.  Each .got entry is 4 bytes.
4069          The first three are reserved.
4070
4071          For static executables, we don't reserve anything.  */
4072
4073       if (plt == htab->elf.splt)
4074         {
4075           plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
4076           got_offset = (plt_index + 3) * 4;
4077         }
4078       else
4079         {
4080           plt_index = h->plt.offset / PLT_ENTRY_SIZE;
4081           got_offset = plt_index * 4;
4082         }
4083
4084       /* Fill in the entry in the procedure linkage table.  */
4085       if (! info->shared)
4086         {
4087           memcpy (plt->contents + h->plt.offset, elf_i386_plt_entry,
4088                   PLT_ENTRY_SIZE);
4089           bfd_put_32 (output_bfd,
4090                       (gotplt->output_section->vma
4091                        + gotplt->output_offset
4092                        + got_offset),
4093                       plt->contents + h->plt.offset + 2);
4094
4095           if (htab->is_vxworks)
4096             {
4097               int s, k, reloc_index;
4098
4099               /* Create the R_386_32 relocation referencing the GOT
4100                  for this PLT entry.  */
4101
4102               /* S: Current slot number (zero-based).  */
4103               s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
4104               /* K: Number of relocations for PLTResolve. */
4105               if (info->shared)
4106                 k = PLTRESOLVE_RELOCS_SHLIB;
4107               else
4108                 k = PLTRESOLVE_RELOCS;
4109               /* Skip the PLTresolve relocations, and the relocations for
4110                  the other PLT slots. */
4111               reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4112               loc = (htab->srelplt2->contents + reloc_index
4113                      * sizeof (Elf32_External_Rel));
4114
4115               rel.r_offset = (htab->elf.splt->output_section->vma
4116                               + htab->elf.splt->output_offset
4117                               + h->plt.offset + 2),
4118               rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4119               bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4120
4121               /* Create the R_386_32 relocation referencing the beginning of
4122                  the PLT for this GOT entry.  */
4123               rel.r_offset = (htab->elf.sgotplt->output_section->vma
4124                               + htab->elf.sgotplt->output_offset
4125                               + got_offset);
4126               rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4127               bfd_elf32_swap_reloc_out (output_bfd, &rel,
4128               loc + sizeof (Elf32_External_Rel));
4129             }
4130         }
4131       else
4132         {
4133           memcpy (plt->contents + h->plt.offset, elf_i386_pic_plt_entry,
4134                   PLT_ENTRY_SIZE);
4135           bfd_put_32 (output_bfd, got_offset,
4136                       plt->contents + h->plt.offset + 2);
4137         }
4138
4139       /* Don't fill PLT entry for static executables.  */
4140       if (plt == htab->elf.splt)
4141         {
4142           bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4143                       plt->contents + h->plt.offset + 7);
4144           bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
4145                       plt->contents + h->plt.offset + 12);
4146         }
4147
4148       /* Fill in the entry in the global offset table.  */
4149       bfd_put_32 (output_bfd,
4150                   (plt->output_section->vma
4151                    + plt->output_offset
4152                    + h->plt.offset
4153                    + 6),
4154                   gotplt->contents + got_offset);
4155
4156       /* Fill in the entry in the .rel.plt section.  */
4157       rel.r_offset = (gotplt->output_section->vma
4158                       + gotplt->output_offset
4159                       + got_offset);
4160       if (h->dynindx == -1
4161           || ((info->executable
4162                || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4163               && h->def_regular
4164                && h->type == STT_GNU_IFUNC))
4165         {
4166           /* If an STT_GNU_IFUNC symbol is locally defined, generate
4167              R_386_IRELATIVE instead of R_386_JUMP_SLOT.  Store addend
4168              in the .got.plt section.  */
4169           bfd_put_32 (output_bfd,
4170                       (h->root.u.def.value
4171                        + h->root.u.def.section->output_section->vma
4172                        + h->root.u.def.section->output_offset),
4173                       gotplt->contents + got_offset);
4174           rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4175         }
4176       else
4177         rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4178       loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4179       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4180
4181       if (!h->def_regular)
4182         {
4183           /* Mark the symbol as undefined, rather than as defined in
4184              the .plt section.  Leave the value if there were any
4185              relocations where pointer equality matters (this is a clue
4186              for the dynamic linker, to make function pointer
4187              comparisons work between an application and shared
4188              library), otherwise set it to zero.  If a function is only
4189              called from a binary, there is no need to slow down
4190              shared libraries because of that.  */
4191           sym->st_shndx = SHN_UNDEF;
4192           if (!h->pointer_equality_needed)
4193             sym->st_value = 0;
4194         }
4195     }
4196
4197   if (h->got.offset != (bfd_vma) -1
4198       && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4199       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4200     {
4201       Elf_Internal_Rela rel;
4202       bfd_byte *loc;
4203
4204       /* This symbol has an entry in the global offset table.  Set it
4205          up.  */
4206
4207       if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4208         abort ();
4209
4210       rel.r_offset = (htab->elf.sgot->output_section->vma
4211                       + htab->elf.sgot->output_offset
4212                       + (h->got.offset & ~(bfd_vma) 1));
4213
4214       /* If this is a static link, or it is a -Bsymbolic link and the
4215          symbol is defined locally or was forced to be local because
4216          of a version file, we just want to emit a RELATIVE reloc.
4217          The entry in the global offset table will already have been
4218          initialized in the relocate_section function.  */
4219       if (h->def_regular
4220           && h->type == STT_GNU_IFUNC)
4221         {
4222           if (info->shared)
4223             {
4224               /* Generate R_386_GLOB_DAT.  */
4225               goto do_glob_dat;
4226             }
4227           else
4228             {
4229               if (!h->pointer_equality_needed)
4230                 abort ();
4231
4232               /* For non-shared object, we can't use .got.plt, which
4233                  contains the real function addres if we need pointer
4234                  equality.  We load the GOT entry with the PLT entry.  */
4235               asection *plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4236               bfd_put_32 (output_bfd,
4237                           (plt->output_section->vma
4238                            + plt->output_offset + h->plt.offset),
4239                           htab->elf.sgot->contents + h->got.offset);
4240               return TRUE;
4241             }
4242         }
4243       else if (info->shared
4244                && SYMBOL_REFERENCES_LOCAL (info, h))
4245         {
4246           BFD_ASSERT((h->got.offset & 1) != 0);
4247           rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4248         }
4249       else
4250         {
4251           BFD_ASSERT((h->got.offset & 1) == 0);
4252 do_glob_dat:
4253           bfd_put_32 (output_bfd, (bfd_vma) 0,
4254                       htab->elf.sgot->contents + h->got.offset);
4255           rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4256         }
4257
4258       loc = htab->elf.srelgot->contents;
4259       loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4260       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4261     }
4262
4263   if (h->needs_copy)
4264     {
4265       Elf_Internal_Rela rel;
4266       bfd_byte *loc;
4267
4268       /* This symbol needs a copy reloc.  Set it up.  */
4269
4270       if (h->dynindx == -1
4271           || (h->root.type != bfd_link_hash_defined
4272               && h->root.type != bfd_link_hash_defweak)
4273           || htab->srelbss == NULL)
4274         abort ();
4275
4276       rel.r_offset = (h->root.u.def.value
4277                       + h->root.u.def.section->output_section->vma
4278                       + h->root.u.def.section->output_offset);
4279       rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4280       loc = htab->srelbss->contents;
4281       loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
4282       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4283     }
4284
4285   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  SYM may
4286      be NULL for local symbols.
4287
4288      On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4289      is relative to the ".got" section.  */
4290   if (sym != NULL
4291       && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4292           || (!htab->is_vxworks && h == htab->elf.hgot)))
4293     sym->st_shndx = SHN_ABS;
4294
4295   return TRUE;
4296 }
4297
4298 /* Finish up local dynamic symbol handling.  We set the contents of
4299    various dynamic sections here.  */
4300
4301 static bfd_boolean
4302 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4303 {
4304   struct elf_link_hash_entry *h
4305     = (struct elf_link_hash_entry *) *slot;
4306   struct bfd_link_info *info
4307     = (struct bfd_link_info *) inf;
4308
4309   return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4310                                          h, NULL);
4311 }
4312
4313 /* Used to decide how to sort relocs in an optimal manner for the
4314    dynamic linker, before writing them out.  */
4315
4316 static enum elf_reloc_type_class
4317 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
4318 {
4319   switch (ELF32_R_TYPE (rela->r_info))
4320     {
4321     case R_386_RELATIVE:
4322       return reloc_class_relative;
4323     case R_386_JUMP_SLOT:
4324       return reloc_class_plt;
4325     case R_386_COPY:
4326       return reloc_class_copy;
4327     default:
4328       return reloc_class_normal;
4329     }
4330 }
4331
4332 /* Finish up the dynamic sections.  */
4333
4334 static bfd_boolean
4335 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4336                                   struct bfd_link_info *info)
4337 {
4338   struct elf_i386_link_hash_table *htab;
4339   bfd *dynobj;
4340   asection *sdyn;
4341
4342   htab = elf_i386_hash_table (info);
4343   dynobj = htab->elf.dynobj;
4344   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4345
4346   if (htab->elf.dynamic_sections_created)
4347     {
4348       Elf32_External_Dyn *dyncon, *dynconend;
4349
4350       if (sdyn == NULL || htab->elf.sgot == NULL)
4351         abort ();
4352
4353       dyncon = (Elf32_External_Dyn *) sdyn->contents;
4354       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4355       for (; dyncon < dynconend; dyncon++)
4356         {
4357           Elf_Internal_Dyn dyn;
4358           asection *s;
4359
4360           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4361
4362           switch (dyn.d_tag)
4363             {
4364             default:
4365               if (htab->is_vxworks
4366                   && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4367                 break;
4368               continue;
4369
4370             case DT_PLTGOT:
4371               s = htab->elf.sgotplt;
4372               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4373               break;
4374
4375             case DT_JMPREL:
4376               s = htab->elf.srelplt;
4377               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4378               break;
4379
4380             case DT_PLTRELSZ:
4381               s = htab->elf.srelplt;
4382               dyn.d_un.d_val = s->size;
4383               break;
4384
4385             case DT_RELSZ:
4386               /* My reading of the SVR4 ABI indicates that the
4387                  procedure linkage table relocs (DT_JMPREL) should be
4388                  included in the overall relocs (DT_REL).  This is
4389                  what Solaris does.  However, UnixWare can not handle
4390                  that case.  Therefore, we override the DT_RELSZ entry
4391                  here to make it not include the JMPREL relocs.  */
4392               s = htab->elf.srelplt;
4393               if (s == NULL)
4394                 continue;
4395               dyn.d_un.d_val -= s->size;
4396               break;
4397
4398             case DT_REL:
4399               /* We may not be using the standard ELF linker script.
4400                  If .rel.plt is the first .rel section, we adjust
4401                  DT_REL to not include it.  */
4402               s = htab->elf.srelplt;
4403               if (s == NULL)
4404                 continue;
4405               if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4406                 continue;
4407               dyn.d_un.d_ptr += s->size;
4408               break;
4409             }
4410
4411           bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4412         }
4413
4414       /* Fill in the first entry in the procedure linkage table.  */
4415       if (htab->elf.splt && htab->elf.splt->size > 0)
4416         {
4417           if (info->shared)
4418             {
4419               memcpy (htab->elf.splt->contents, elf_i386_pic_plt0_entry,
4420                       sizeof (elf_i386_pic_plt0_entry));
4421               memset (htab->elf.splt->contents + sizeof (elf_i386_pic_plt0_entry),
4422                       htab->plt0_pad_byte,
4423                       PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
4424             }
4425           else
4426             {
4427               memcpy (htab->elf.splt->contents, elf_i386_plt0_entry,
4428                       sizeof(elf_i386_plt0_entry));
4429               memset (htab->elf.splt->contents + sizeof (elf_i386_plt0_entry),
4430                       htab->plt0_pad_byte,
4431                       PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
4432               bfd_put_32 (output_bfd,
4433                           (htab->elf.sgotplt->output_section->vma
4434                            + htab->elf.sgotplt->output_offset
4435                            + 4),
4436                           htab->elf.splt->contents + 2);
4437               bfd_put_32 (output_bfd,
4438                           (htab->elf.sgotplt->output_section->vma
4439                            + htab->elf.sgotplt->output_offset
4440                            + 8),
4441                           htab->elf.splt->contents + 8);
4442
4443               if (htab->is_vxworks)
4444                 {
4445                   Elf_Internal_Rela rel;
4446
4447                   /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4448                      On IA32 we use REL relocations so the addend goes in
4449                      the PLT directly.  */
4450                   rel.r_offset = (htab->elf.splt->output_section->vma
4451                                   + htab->elf.splt->output_offset
4452                                   + 2);
4453                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4454                   bfd_elf32_swap_reloc_out (output_bfd, &rel,
4455                                             htab->srelplt2->contents);
4456                   /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8.  */
4457                   rel.r_offset = (htab->elf.splt->output_section->vma
4458                                   + htab->elf.splt->output_offset
4459                                   + 8);
4460                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4461                   bfd_elf32_swap_reloc_out (output_bfd, &rel,
4462                                             htab->srelplt2->contents +
4463                                             sizeof (Elf32_External_Rel));
4464                 }
4465             }
4466
4467           /* UnixWare sets the entsize of .plt to 4, although that doesn't
4468              really seem like the right value.  */
4469           elf_section_data (htab->elf.splt->output_section)
4470             ->this_hdr.sh_entsize = 4;
4471
4472           /* Correct the .rel.plt.unloaded relocations.  */
4473           if (htab->is_vxworks && !info->shared)
4474             {
4475               int num_plts = (htab->elf.splt->size / PLT_ENTRY_SIZE) - 1;
4476               unsigned char *p;
4477
4478               p = htab->srelplt2->contents;
4479               if (info->shared)
4480                 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4481               else
4482                 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4483
4484               for (; num_plts; num_plts--)
4485                 {
4486                   Elf_Internal_Rela rel;
4487                   bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4488                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4489                   bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4490                   p += sizeof (Elf32_External_Rel);
4491
4492                   bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4493                   rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4494                   bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4495                   p += sizeof (Elf32_External_Rel);
4496                 }
4497             }
4498         }
4499     }
4500
4501   if (htab->elf.sgotplt)
4502     {
4503       /* Fill in the first three entries in the global offset table.  */
4504       if (htab->elf.sgotplt->size > 0)
4505         {
4506           bfd_put_32 (output_bfd,
4507                       (sdyn == NULL ? 0
4508                        : sdyn->output_section->vma + sdyn->output_offset),
4509                       htab->elf.sgotplt->contents);
4510           bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4511           bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4512         }
4513
4514       elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4515     }
4516
4517   if (htab->elf.sgot && htab->elf.sgot->size > 0)
4518     elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4519
4520   /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols.  */
4521   htab_traverse (htab->loc_hash_table,
4522                  elf_i386_finish_local_dynamic_symbol,
4523                  info);
4524
4525   return TRUE;
4526 }
4527
4528 /* Return address for Ith PLT stub in section PLT, for relocation REL
4529    or (bfd_vma) -1 if it should not be included.  */
4530
4531 static bfd_vma
4532 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4533                       const arelent *rel ATTRIBUTE_UNUSED)
4534 {
4535   return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4536 }
4537
4538 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section.  */
4539
4540 static bfd_boolean
4541 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
4542 {
4543   if (h->plt.offset != (bfd_vma) -1
4544       && !h->def_regular
4545       && !h->pointer_equality_needed)
4546     return FALSE;
4547
4548   return _bfd_elf_hash_symbol (h);
4549 }
4550
4551 /* Hook called by the linker routine which adds symbols from an object
4552    file.  */
4553
4554 static bfd_boolean
4555 elf_i386_add_symbol_hook (bfd * abfd ATTRIBUTE_UNUSED,
4556                           struct bfd_link_info * info ATTRIBUTE_UNUSED,
4557                           Elf_Internal_Sym * sym,
4558                           const char ** namep ATTRIBUTE_UNUSED,
4559                           flagword * flagsp ATTRIBUTE_UNUSED,
4560                           asection ** secp ATTRIBUTE_UNUSED,
4561                           bfd_vma * valp ATTRIBUTE_UNUSED)
4562 {
4563   if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4564     elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4565
4566   return TRUE;
4567 }
4568
4569 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vec
4570 #define TARGET_LITTLE_NAME              "elf32-i386"
4571 #define ELF_ARCH                        bfd_arch_i386
4572 #define ELF_MACHINE_CODE                EM_386
4573 #define ELF_MAXPAGESIZE                 0x1000
4574
4575 #define elf_backend_can_gc_sections     1
4576 #define elf_backend_can_refcount        1
4577 #define elf_backend_want_got_plt        1
4578 #define elf_backend_plt_readonly        1
4579 #define elf_backend_want_plt_sym        0
4580 #define elf_backend_got_header_size     12
4581
4582 /* Support RELA for objdump of prelink objects.  */
4583 #define elf_info_to_howto                     elf_i386_info_to_howto_rel
4584 #define elf_info_to_howto_rel                 elf_i386_info_to_howto_rel
4585
4586 #define bfd_elf32_mkobject                    elf_i386_mkobject
4587
4588 #define bfd_elf32_bfd_is_local_label_name     elf_i386_is_local_label_name
4589 #define bfd_elf32_bfd_link_hash_table_create  elf_i386_link_hash_table_create
4590 #define bfd_elf32_bfd_link_hash_table_free    elf_i386_link_hash_table_free
4591 #define bfd_elf32_bfd_reloc_type_lookup       elf_i386_reloc_type_lookup
4592 #define bfd_elf32_bfd_reloc_name_lookup       elf_i386_reloc_name_lookup
4593
4594 #define elf_backend_adjust_dynamic_symbol     elf_i386_adjust_dynamic_symbol
4595 #define elf_backend_relocs_compatible         _bfd_elf_relocs_compatible
4596 #define elf_backend_check_relocs              elf_i386_check_relocs
4597 #define elf_backend_copy_indirect_symbol      elf_i386_copy_indirect_symbol
4598 #define elf_backend_create_dynamic_sections   elf_i386_create_dynamic_sections
4599 #define elf_backend_fake_sections             elf_i386_fake_sections
4600 #define elf_backend_finish_dynamic_sections   elf_i386_finish_dynamic_sections
4601 #define elf_backend_finish_dynamic_symbol     elf_i386_finish_dynamic_symbol
4602 #define elf_backend_gc_mark_hook              elf_i386_gc_mark_hook
4603 #define elf_backend_gc_sweep_hook             elf_i386_gc_sweep_hook
4604 #define elf_backend_grok_prstatus             elf_i386_grok_prstatus
4605 #define elf_backend_grok_psinfo               elf_i386_grok_psinfo
4606 #define elf_backend_reloc_type_class          elf_i386_reloc_type_class
4607 #define elf_backend_relocate_section          elf_i386_relocate_section
4608 #define elf_backend_size_dynamic_sections     elf_i386_size_dynamic_sections
4609 #define elf_backend_always_size_sections      elf_i386_always_size_sections
4610 #define elf_backend_omit_section_dynsym \
4611   ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4612 #define elf_backend_plt_sym_val               elf_i386_plt_sym_val
4613 #define elf_backend_hash_symbol               elf_i386_hash_symbol
4614 #define elf_backend_add_symbol_hook           elf_i386_add_symbol_hook
4615 #undef  elf_backend_post_process_headers
4616 #define elf_backend_post_process_headers        _bfd_elf_set_osabi
4617
4618 #include "elf32-target.h"
4619
4620 /* FreeBSD support.  */
4621
4622 #undef  TARGET_LITTLE_SYM
4623 #define TARGET_LITTLE_SYM               bfd_elf32_i386_freebsd_vec
4624 #undef  TARGET_LITTLE_NAME
4625 #define TARGET_LITTLE_NAME              "elf32-i386-freebsd"
4626 #undef  ELF_OSABI
4627 #define ELF_OSABI                       ELFOSABI_FREEBSD
4628
4629 /* The kernel recognizes executables as valid only if they carry a
4630    "FreeBSD" label in the ELF header.  So we put this label on all
4631    executables and (for simplicity) also all other object files.  */
4632
4633 static void
4634 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4635 {
4636   _bfd_elf_set_osabi (abfd, info);
4637
4638 #ifdef OLD_FREEBSD_ABI_LABEL
4639   /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
4640   memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4641 #endif
4642 }
4643
4644 #undef  elf_backend_post_process_headers
4645 #define elf_backend_post_process_headers        elf_i386_fbsd_post_process_headers
4646 #undef  elf32_bed
4647 #define elf32_bed                               elf32_i386_fbsd_bed
4648
4649 #undef elf_backend_add_symbol_hook
4650
4651 #include "elf32-target.h"
4652
4653 /* VxWorks support.  */
4654
4655 #undef  TARGET_LITTLE_SYM
4656 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vxworks_vec
4657 #undef  TARGET_LITTLE_NAME
4658 #define TARGET_LITTLE_NAME              "elf32-i386-vxworks"
4659 #undef  ELF_OSABI
4660
4661 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks.  */
4662
4663 static struct bfd_link_hash_table *
4664 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4665 {
4666   struct bfd_link_hash_table *ret;
4667   struct elf_i386_link_hash_table *htab;
4668
4669   ret = elf_i386_link_hash_table_create (abfd);
4670   if (ret)
4671     {
4672       htab = (struct elf_i386_link_hash_table *) ret;
4673       htab->is_vxworks = 1;
4674       htab->plt0_pad_byte = 0x90;
4675     }
4676
4677   return ret;
4678 }
4679
4680
4681 #undef elf_backend_relocs_compatible
4682 #undef elf_backend_post_process_headers
4683 #undef bfd_elf32_bfd_link_hash_table_create
4684 #define bfd_elf32_bfd_link_hash_table_create \
4685   elf_i386_vxworks_link_hash_table_create
4686 #undef elf_backend_add_symbol_hook
4687 #define elf_backend_add_symbol_hook \
4688   elf_vxworks_add_symbol_hook
4689 #undef elf_backend_link_output_symbol_hook
4690 #define elf_backend_link_output_symbol_hook \
4691   elf_vxworks_link_output_symbol_hook
4692 #undef elf_backend_emit_relocs
4693 #define elf_backend_emit_relocs                 elf_vxworks_emit_relocs
4694 #undef elf_backend_final_write_processing
4695 #define elf_backend_final_write_processing \
4696   elf_vxworks_final_write_processing
4697
4698 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4699    define it.  */
4700 #undef elf_backend_want_plt_sym
4701 #define elf_backend_want_plt_sym        1
4702
4703 #undef  elf32_bed
4704 #define elf32_bed                               elf32_i386_vxworks_bed
4705
4706 #include "elf32-target.h"