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, 2009, 2010 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_lwpid = 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_lwpid = 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_pid
 479             = bfd_get_32 (abfd, note->descdata + 12);
 480           elf_tdata (abfd)->core_program
 481             = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 482           elf_tdata (abfd)->core_command
 483             = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 484         }
 485     }
 486
 487   /* Note that for some reason, a spurious space is tacked
 488      onto the end of the args in some (at least one anyway)
 489      implementations, so strip it off if it exists.  */
 490   {
 491     char *command = elf_tdata (abfd)->core_command;
 492     int n = strlen (command);
 493
 494     if (0 < n && command[n - 1] == ' ')
 495       command[n - 1] = '\0';
 496   }
 497
 498   return TRUE;
 499 }
 500 \f
 501 /* Functions for the i386 ELF linker.
 502
 503    In order to gain some understanding of code in this file without
 504    knowing all the intricate details of the linker, note the
 505    following:
 506
 507    Functions named elf_i386_* are called by external routines, other
 508    functions are only called locally.  elf_i386_* functions appear
 509    in this file more or less in the order in which they are called
 510    from external routines.  eg. elf_i386_check_relocs is called
 511    early in the link process, elf_i386_finish_dynamic_sections is
 512    one of the last functions.  */
 513
 514
 515 /* The name of the dynamic interpreter.  This is put in the .interp
 516    section.  */
 517
 518 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
 519
 520 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
 521    copying dynamic variables from a shared lib into an app's dynbss
 522    section, and instead use a dynamic relocation to point into the
 523    shared lib.  */
 524 #define ELIMINATE_COPY_RELOCS 1
 525
 526 /* The size in bytes of an entry in the procedure linkage table.  */
 527
 528 #define PLT_ENTRY_SIZE 16
 529
 530 /* The first entry in an absolute procedure linkage table looks like
 531    this.  See the SVR4 ABI i386 supplement to see how this works.
 532    Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte.  */
 533
 534 static const bfd_byte elf_i386_plt0_entry[12] =
 535 {
 536   0xff, 0x35,   /* pushl contents of address */
 537   0, 0, 0, 0,   /* replaced with address of .got + 4.  */
 538   0xff, 0x25,   /* jmp indirect */
 539   0, 0, 0, 0    /* replaced with address of .got + 8.  */
 540 };
 541
 542 /* Subsequent entries in an absolute procedure linkage table look like
 543    this.  */
 544
 545 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
 546 {
 547   0xff, 0x25,   /* jmp indirect */
 548   0, 0, 0, 0,   /* replaced with address of this symbol in .got.  */
 549   0x68,         /* pushl immediate */
 550   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 551   0xe9,         /* jmp relative */
 552   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 553 };
 554
 555 /* The first entry in a PIC procedure linkage table look like this.
 556    Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte.  */
 557
 558 static const bfd_byte elf_i386_pic_plt0_entry[12] =
 559 {
 560   0xff, 0xb3, 4, 0, 0, 0,       /* pushl 4(%ebx) */
 561   0xff, 0xa3, 8, 0, 0, 0        /* jmp *8(%ebx) */
 562 };
 563
 564 /* Subsequent entries in a PIC procedure linkage table look like this.  */
 565
 566 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
 567 {
 568   0xff, 0xa3,   /* jmp *offset(%ebx) */
 569   0, 0, 0, 0,   /* replaced with offset of this symbol in .got.  */
 570   0x68,         /* pushl immediate */
 571   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 572   0xe9,         /* jmp relative */
 573   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 574 };
 575
 576 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
 577    for the PLTResolve stub and then for each PLT entry.  */
 578 #define PLTRESOLVE_RELOCS_SHLIB 0
 579 #define PLTRESOLVE_RELOCS 2
 580 #define PLT_NON_JUMP_SLOT_RELOCS 2
 581
 582 /* i386 ELF linker hash entry.  */
 583
 584 struct elf_i386_link_hash_entry
 585 {
 586   struct elf_link_hash_entry elf;
 587
 588   /* Track dynamic relocs copied for this symbol.  */
 589   struct elf_dyn_relocs *dyn_relocs;
 590
 591 #define GOT_UNKNOWN     0
 592 #define GOT_NORMAL      1
 593 #define GOT_TLS_GD      2
 594 #define GOT_TLS_IE      4
 595 #define GOT_TLS_IE_POS  5
 596 #define GOT_TLS_IE_NEG  6
 597 #define GOT_TLS_IE_BOTH 7
 598 #define GOT_TLS_GDESC   8
 599 #define GOT_TLS_GD_BOTH_P(type)                                         \
 600   ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
 601 #define GOT_TLS_GD_P(type)                                              \
 602   ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
 603 #define GOT_TLS_GDESC_P(type)                                           \
 604   ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
 605 #define GOT_TLS_GD_ANY_P(type)                                          \
 606   (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
 607   unsigned char tls_type;
 608
 609   /* Offset of the GOTPLT entry reserved for the TLS descriptor,
 610      starting at the end of the jump table.  */
 611   bfd_vma tlsdesc_got;
 612 };
 613
 614 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
 615
 616 struct elf_i386_obj_tdata
 617 {
 618   struct elf_obj_tdata root;
 619
 620   /* tls_type for each local got entry.  */
 621   char *local_got_tls_type;
 622
 623   /* GOTPLT entries for TLS descriptors.  */
 624   bfd_vma *local_tlsdesc_gotent;
 625 };
 626
 627 #define elf_i386_tdata(abfd) \
 628   ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
 629
 630 #define elf_i386_local_got_tls_type(abfd) \
 631   (elf_i386_tdata (abfd)->local_got_tls_type)
 632
 633 #define elf_i386_local_tlsdesc_gotent(abfd) \
 634   (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
 635
 636 #define is_i386_elf(bfd)                                \
 637   (bfd_get_flavour (bfd) == bfd_target_elf_flavour      \
 638    && elf_tdata (bfd) != NULL                           \
 639    && elf_object_id (bfd) == I386_ELF_DATA)
 640
 641 static bfd_boolean
 642 elf_i386_mkobject (bfd *abfd)
 643 {
 644   return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
 645                                   I386_ELF_DATA);
 646 }
 647
 648 /* i386 ELF linker hash table.  */
 649
 650 struct elf_i386_link_hash_table
 651 {
 652   struct elf_link_hash_table elf;
 653
 654   /* Short-cuts to get to dynamic linker sections.  */
 655   asection *sdynbss;
 656   asection *srelbss;
 657
 658   union
 659   {
 660     bfd_signed_vma refcount;
 661     bfd_vma offset;
 662   } tls_ldm_got;
 663
 664   /* The amount of space used by the reserved portion of the sgotplt
 665      section, plus whatever space is used by the jump slots.  */
 666   bfd_vma sgotplt_jump_table_size;
 667
 668   /* Small local sym cache.  */
 669   struct sym_cache sym_cache;
 670
 671   /* _TLS_MODULE_BASE_ symbol.  */
 672   struct bfd_link_hash_entry *tls_module_base;
 673
 674   /* Used by local STT_GNU_IFUNC symbols.  */
 675   htab_t loc_hash_table;
 676   void * loc_hash_memory;
 677
 678   /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.  */
 679   asection *srelplt2;
 680
 681   /* True if the target system is VxWorks.  */
 682   int is_vxworks;
 683
 684   /* The index of the next unused R_386_TLS_DESC slot in .rel.plt.  */
 685   bfd_vma next_tls_desc_index;
 686
 687   /* Value used to fill the last word of the first plt entry.  */
 688   bfd_byte plt0_pad_byte;
 689 };
 690
 691 /* Get the i386 ELF linker hash table from a link_info structure.  */
 692
 693 #define elf_i386_hash_table(p) \
 694   (elf_hash_table_id  ((struct elf_link_hash_table *) ((p)->hash)) \
 695   == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
 696
 697 #define elf_i386_compute_jump_table_size(htab) \
 698   ((htab)->next_tls_desc_index * 4)
 699
 700 /* Create an entry in an i386 ELF linker hash table.  */
 701
 702 static struct bfd_hash_entry *
 703 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
 704                             struct bfd_hash_table *table,
 705                             const char *string)
 706 {
 707   /* Allocate the structure if it has not already been allocated by a
 708      subclass.  */
 709   if (entry == NULL)
 710     {
 711       entry = (struct bfd_hash_entry *)
 712           bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
 713       if (entry == NULL)
 714         return entry;
 715     }
 716
 717   /* Call the allocation method of the superclass.  */
 718   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 719   if (entry != NULL)
 720     {
 721       struct elf_i386_link_hash_entry *eh;
 722
 723       eh = (struct elf_i386_link_hash_entry *) entry;
 724       eh->dyn_relocs = NULL;
 725       eh->tls_type = GOT_UNKNOWN;
 726       eh->tlsdesc_got = (bfd_vma) -1;
 727     }
 728
 729   return entry;
 730 }
 731
 732 /* Compute a hash of a local hash entry.  We use elf_link_hash_entry
 733   for local symbol so that we can handle local STT_GNU_IFUNC symbols
 734   as global symbol.  We reuse indx and dynstr_index for local symbol
 735   hash since they aren't used by global symbols in this backend.  */
 736
 737 static hashval_t
 738 elf_i386_local_htab_hash (const void *ptr)
 739 {
 740   struct elf_link_hash_entry *h
 741     = (struct elf_link_hash_entry *) ptr;
 742   return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
 743 }
 744
 745 /* Compare local hash entries.  */
 746
 747 static int
 748 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
 749 {
 750   struct elf_link_hash_entry *h1
 751      = (struct elf_link_hash_entry *) ptr1;
 752   struct elf_link_hash_entry *h2
 753     = (struct elf_link_hash_entry *) ptr2;
 754
 755   return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
 756 }
 757
 758 /* Find and/or create a hash entry for local symbol.  */
 759
 760 static struct elf_link_hash_entry *
 761 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
 762                              bfd *abfd, const Elf_Internal_Rela *rel,
 763                              bfd_boolean create)
 764 {
 765   struct elf_i386_link_hash_entry e, *ret;
 766   asection *sec = abfd->sections;
 767   hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
 768                                        ELF32_R_SYM (rel->r_info));
 769   void **slot;
 770
 771   e.elf.indx = sec->id;
 772   e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
 773   slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
 774                                    create ? INSERT : NO_INSERT);
 775
 776   if (!slot)
 777     return NULL;
 778
 779   if (*slot)
 780     {
 781       ret = (struct elf_i386_link_hash_entry *) *slot;
 782       return &ret->elf;
 783     }
 784
 785   ret = (struct elf_i386_link_hash_entry *)
 786         objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
 787                         sizeof (struct elf_i386_link_hash_entry));
 788   if (ret)
 789     {
 790       memset (ret, 0, sizeof (*ret));
 791       ret->elf.indx = sec->id;
 792       ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
 793       ret->elf.dynindx = -1;
 794       *slot = ret;
 795     }
 796   return &ret->elf;
 797 }
 798
 799 /* Create an i386 ELF linker hash table.  */
 800
 801 static struct bfd_link_hash_table *
 802 elf_i386_link_hash_table_create (bfd *abfd)
 803 {
 804   struct elf_i386_link_hash_table *ret;
 805   bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
 806
 807   ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt);
 808   if (ret == NULL)
 809     return NULL;
 810
 811   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
 812                                       elf_i386_link_hash_newfunc,
 813                                       sizeof (struct elf_i386_link_hash_entry),
 814                                       I386_ELF_DATA))
 815     {
 816       free (ret);
 817       return NULL;
 818     }
 819
 820   ret->sdynbss = NULL;
 821   ret->srelbss = NULL;
 822   ret->tls_ldm_got.refcount = 0;
 823   ret->next_tls_desc_index = 0;
 824   ret->sgotplt_jump_table_size = 0;
 825   ret->sym_cache.abfd = NULL;
 826   ret->is_vxworks = 0;
 827   ret->srelplt2 = NULL;
 828   ret->plt0_pad_byte = 0;
 829   ret->tls_module_base = NULL;
 830
 831   ret->loc_hash_table = htab_try_create (1024,
 832                                          elf_i386_local_htab_hash,
 833                                          elf_i386_local_htab_eq,
 834                                          NULL);
 835   ret->loc_hash_memory = objalloc_create ();
 836   if (!ret->loc_hash_table || !ret->loc_hash_memory)
 837     {
 838       free (ret);
 839       return NULL;
 840     }
 841
 842   return &ret->elf.root;
 843 }
 844
 845 /* Destroy an i386 ELF linker hash table.  */
 846
 847 static void
 848 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
 849 {
 850   struct elf_i386_link_hash_table *htab
 851     = (struct elf_i386_link_hash_table *) hash;
 852
 853   if (htab->loc_hash_table)
 854     htab_delete (htab->loc_hash_table);
 855   if (htab->loc_hash_memory)
 856     objalloc_free ((struct objalloc *) htab->loc_hash_memory);
 857   _bfd_generic_link_hash_table_free (hash);
 858 }
 859
 860 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
 861    .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
 862    hash table.  */
 863
 864 static bfd_boolean
 865 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
 866 {
 867   struct elf_i386_link_hash_table *htab;
 868
 869   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 870     return FALSE;
 871
 872   htab = elf_i386_hash_table (info);
 873   if (htab == NULL)
 874     return FALSE;
 875
 876   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 877   if (!info->shared)
 878     htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
 879
 880   if (!htab->sdynbss
 881       || (!info->shared && !htab->srelbss))
 882     abort ();
 883
 884   if (htab->is_vxworks
 885       && !elf_vxworks_create_dynamic_sections (dynobj, info,
 886                                                &htab->srelplt2))
 887     return FALSE;
 888
 889   return TRUE;
 890 }
 891
 892 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 893
 894 static void
 895 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
 896                                struct elf_link_hash_entry *dir,
 897                                struct elf_link_hash_entry *ind)
 898 {
 899   struct elf_i386_link_hash_entry *edir, *eind;
 900
 901   edir = (struct elf_i386_link_hash_entry *) dir;
 902   eind = (struct elf_i386_link_hash_entry *) ind;
 903
 904   if (eind->dyn_relocs != NULL)
 905     {
 906       if (edir->dyn_relocs != NULL)
 907         {
 908           struct elf_dyn_relocs **pp;
 909           struct elf_dyn_relocs *p;
 910
 911           /* Add reloc counts against the indirect sym to the direct sym
 912              list.  Merge any entries against the same section.  */
 913           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 914             {
 915               struct elf_dyn_relocs *q;
 916
 917               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 918                 if (q->sec == p->sec)
 919                   {
 920                     q->pc_count += p->pc_count;
 921                     q->count += p->count;
 922                     *pp = p->next;
 923                     break;
 924                   }
 925               if (q == NULL)
 926                 pp = &p->next;
 927             }
 928           *pp = edir->dyn_relocs;
 929         }
 930
 931       edir->dyn_relocs = eind->dyn_relocs;
 932       eind->dyn_relocs = NULL;
 933     }
 934
 935   if (ind->root.type == bfd_link_hash_indirect
 936       && dir->got.refcount <= 0)
 937     {
 938       edir->tls_type = eind->tls_type;
 939       eind->tls_type = GOT_UNKNOWN;
 940     }
 941
 942   if (ELIMINATE_COPY_RELOCS
 943       && ind->root.type != bfd_link_hash_indirect
 944       && dir->dynamic_adjusted)
 945     {
 946       /* If called to transfer flags for a weakdef during processing
 947          of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 948          We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 949       dir->ref_dynamic |= ind->ref_dynamic;
 950       dir->ref_regular |= ind->ref_regular;
 951       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
 952       dir->needs_plt |= ind->needs_plt;
 953       dir->pointer_equality_needed |= ind->pointer_equality_needed;
 954     }
 955   else
 956     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 957 }
 958
 959 typedef union
 960   {
 961     unsigned char c[2];
 962     uint16_t i;
 963   }
 964 i386_opcode16;
 965
 966 /* Return TRUE if the TLS access code sequence support transition
 967    from R_TYPE.  */
 968
 969 static bfd_boolean
 970 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
 971                                bfd_byte *contents,
 972                                Elf_Internal_Shdr *symtab_hdr,
 973                                struct elf_link_hash_entry **sym_hashes,
 974                                unsigned int r_type,
 975                                const Elf_Internal_Rela *rel,
 976                                const Elf_Internal_Rela *relend)
 977 {
 978   unsigned int val, type;
 979   unsigned long r_symndx;
 980   struct elf_link_hash_entry *h;
 981   bfd_vma offset;
 982
 983   /* Get the section contents.  */
 984   if (contents == NULL)
 985     {
 986       if (elf_section_data (sec)->this_hdr.contents != NULL)
 987         contents = elf_section_data (sec)->this_hdr.contents;
 988       else
 989         {
 990           /* FIXME: How to better handle error condition?  */
 991           if (!bfd_malloc_and_get_section (abfd, sec, &contents))
 992             return FALSE;
 993
 994           /* Cache the section contents for elf_link_input_bfd.  */
 995           elf_section_data (sec)->this_hdr.contents = contents;
 996         }
 997     }
 998
 999   offset = rel->r_offset;
1000   switch (r_type)
1001     {
1002     case R_386_TLS_GD:
1003     case R_386_TLS_LDM:
1004       if (offset < 2 || (rel + 1) >= relend)
1005         return FALSE;
1006
1007       type = bfd_get_8 (abfd, contents + offset - 2);
1008       if (r_type == R_386_TLS_GD)
1009         {
1010           /* Check transition from GD access model.  Only
1011                 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1012                 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1013              can transit to different access model.  */
1014           if ((offset + 10) > sec->size ||
1015               (type != 0x8d && type != 0x04))
1016             return FALSE;
1017
1018           val = bfd_get_8 (abfd, contents + offset - 1);
1019           if (type == 0x04)
1020             {
1021               /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1022               if (offset < 3)
1023                 return FALSE;
1024
1025               if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1026                 return FALSE;
1027
1028               if ((val & 0xc7) != 0x05 || val == (4 << 3))
1029                 return FALSE;
1030             }
1031           else
1032             {
1033               /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop  */
1034               if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1035                 return FALSE;
1036
1037               if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1038                 return FALSE;
1039             }
1040         }
1041       else
1042         {
1043           /* Check transition from LD access model.  Only
1044                 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1045              can transit to different access model.  */
1046           if (type != 0x8d || (offset + 9) > sec->size)
1047             return FALSE;
1048
1049           val = bfd_get_8 (abfd, contents + offset - 1);
1050           if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1051             return FALSE;
1052         }
1053
1054       if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1055         return FALSE;
1056
1057       r_symndx = ELF32_R_SYM (rel[1].r_info);
1058       if (r_symndx < symtab_hdr->sh_info)
1059         return FALSE;
1060
1061       h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1062       /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1063          may be versioned.  */
1064       return (h != NULL
1065               && h->root.root.string != NULL
1066               && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1067                   || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1068               && (strncmp (h->root.root.string, "___tls_get_addr",
1069                            15) == 0));
1070
1071     case R_386_TLS_IE:
1072       /* Check transition from IE access model:
1073                 movl foo@indntpoff(%rip), %eax
1074                 movl foo@indntpoff(%rip), %reg
1075                 addl foo@indntpoff(%rip), %reg
1076        */
1077
1078       if (offset < 1 || (offset + 4) > sec->size)
1079         return FALSE;
1080
1081       /* Check "movl foo@tpoff(%rip), %eax" first.  */
1082       val = bfd_get_8 (abfd, contents + offset - 1);
1083       if (val == 0xa1)
1084         return TRUE;
1085
1086       if (offset < 2)
1087         return FALSE;
1088
1089       /* Check movl|addl foo@tpoff(%rip), %reg.   */
1090       type = bfd_get_8 (abfd, contents + offset - 2);
1091       return ((type == 0x8b || type == 0x03)
1092               && (val & 0xc7) == 0x05);
1093
1094     case R_386_TLS_GOTIE:
1095     case R_386_TLS_IE_32:
1096       /* Check transition from {IE_32,GOTIE} access model:
1097                 subl foo@{tpoff,gontoff}(%reg1), %reg2
1098                 movl foo@{tpoff,gontoff}(%reg1), %reg2
1099                 addl foo@{tpoff,gontoff}(%reg1), %reg2
1100        */
1101
1102       if (offset < 2 || (offset + 4) > sec->size)
1103         return FALSE;
1104
1105       val = bfd_get_8 (abfd, contents + offset - 1);
1106       if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1107         return FALSE;
1108
1109       type = bfd_get_8 (abfd, contents + offset - 2);
1110       return type == 0x8b || type == 0x2b || type == 0x03;
1111
1112     case R_386_TLS_GOTDESC:
1113       /* Check transition from GDesc access model:
1114                 leal x@tlsdesc(%ebx), %eax
1115
1116          Make sure it's a leal adding ebx to a 32-bit offset
1117          into any register, although it's probably almost always
1118          going to be eax.  */
1119
1120       if (offset < 2 || (offset + 4) > sec->size)
1121         return FALSE;
1122
1123       if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1124         return FALSE;
1125
1126       val = bfd_get_8 (abfd, contents + offset - 1);
1127       return (val & 0xc7) == 0x83;
1128
1129     case R_386_TLS_DESC_CALL:
1130       /* Check transition from GDesc access model:
1131                 call *x@tlsdesc(%rax)
1132        */
1133       if (offset + 2 <= sec->size)
1134         {
1135           /* Make sure that it's a call *x@tlsdesc(%rax).  */
1136           static i386_opcode16 call = { { 0xff, 0x10 } };
1137           return bfd_get_16 (abfd, contents + offset) == call.i;
1138         }
1139
1140       return FALSE;
1141
1142     default:
1143       abort ();
1144     }
1145 }
1146
1147 /* Return TRUE if the TLS access transition is OK or no transition
1148    will be performed.  Update R_TYPE if there is a transition.  */
1149
1150 static bfd_boolean
1151 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1152                          asection *sec, bfd_byte *contents,
1153                          Elf_Internal_Shdr *symtab_hdr,
1154                          struct elf_link_hash_entry **sym_hashes,
1155                          unsigned int *r_type, int tls_type,
1156                          const Elf_Internal_Rela *rel,
1157                          const Elf_Internal_Rela *relend,
1158                          struct elf_link_hash_entry *h,
1159                          unsigned long r_symndx)
1160 {
1161   unsigned int from_type = *r_type;
1162   unsigned int to_type = from_type;
1163   bfd_boolean check = TRUE;
1164
1165   /* Skip TLS transition for functions.  */
1166   if (h != NULL
1167       && (h->type == STT_FUNC
1168           || h->type == STT_GNU_IFUNC))
1169     return TRUE;
1170
1171   switch (from_type)
1172     {
1173     case R_386_TLS_GD:
1174     case R_386_TLS_GOTDESC:
1175     case R_386_TLS_DESC_CALL:
1176     case R_386_TLS_IE_32:
1177     case R_386_TLS_IE:
1178     case R_386_TLS_GOTIE:
1179       if (info->executable)
1180         {
1181           if (h == NULL)
1182             to_type = R_386_TLS_LE_32;
1183           else if (from_type != R_386_TLS_IE
1184                    && from_type != R_386_TLS_GOTIE)
1185             to_type = R_386_TLS_IE_32;
1186         }
1187
1188       /* When we are called from elf_i386_relocate_section, CONTENTS
1189          isn't NULL and there may be additional transitions based on
1190          TLS_TYPE.  */
1191       if (contents != NULL)
1192         {
1193           unsigned int new_to_type = to_type;
1194
1195           if (info->executable
1196               && h != NULL
1197               && h->dynindx == -1
1198               && (tls_type & GOT_TLS_IE))
1199             new_to_type = R_386_TLS_LE_32;
1200
1201           if (to_type == R_386_TLS_GD
1202               || to_type == R_386_TLS_GOTDESC
1203               || to_type == R_386_TLS_DESC_CALL)
1204             {
1205               if (tls_type == GOT_TLS_IE_POS)
1206                 new_to_type = R_386_TLS_GOTIE;
1207               else if (tls_type & GOT_TLS_IE)
1208                 new_to_type = R_386_TLS_IE_32;
1209             }
1210
1211           /* We checked the transition before when we were called from
1212              elf_i386_check_relocs.  We only want to check the new
1213              transition which hasn't been checked before.  */
1214           check = new_to_type != to_type && from_type == to_type;
1215           to_type = new_to_type;
1216         }
1217
1218       break;
1219
1220     case R_386_TLS_LDM:
1221       if (info->executable)
1222         to_type = R_386_TLS_LE_32;
1223       break;
1224
1225     default:
1226       return TRUE;
1227     }
1228
1229   /* Return TRUE if there is no transition.  */
1230   if (from_type == to_type)
1231     return TRUE;
1232
1233   /* Check if the transition can be performed.  */
1234   if (check
1235       && ! elf_i386_check_tls_transition (abfd, sec, contents,
1236                                           symtab_hdr, sym_hashes,
1237                                           from_type, rel, relend))
1238     {
1239       reloc_howto_type *from, *to;
1240       const char *name;
1241
1242       from = elf_i386_rtype_to_howto (abfd, from_type);
1243       to = elf_i386_rtype_to_howto (abfd, to_type);
1244
1245       if (h)
1246         name = h->root.root.string;
1247       else
1248         {
1249           struct elf_i386_link_hash_table *htab;
1250
1251           htab = elf_i386_hash_table (info);
1252           if (htab == NULL)
1253             name = "*unknown*";
1254           else
1255             {
1256               Elf_Internal_Sym *isym;
1257
1258               isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1259                                             abfd, r_symndx);
1260               name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1261             }
1262         }
1263
1264       (*_bfd_error_handler)
1265         (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1266            "in section `%A' failed"),
1267          abfd, sec, from->name, to->name, name,
1268          (unsigned long) rel->r_offset);
1269       bfd_set_error (bfd_error_bad_value);
1270       return FALSE;
1271     }
1272
1273   *r_type = to_type;
1274   return TRUE;
1275 }
1276
1277 /* Look through the relocs for a section during the first phase, and
1278    calculate needed space in the global offset table, procedure linkage
1279    table, and dynamic reloc sections.  */
1280
1281 static bfd_boolean
1282 elf_i386_check_relocs (bfd *abfd,
1283                        struct bfd_link_info *info,
1284                        asection *sec,
1285                        const Elf_Internal_Rela *relocs)
1286 {
1287   struct elf_i386_link_hash_table *htab;
1288   Elf_Internal_Shdr *symtab_hdr;
1289   struct elf_link_hash_entry **sym_hashes;
1290   const Elf_Internal_Rela *rel;
1291   const Elf_Internal_Rela *rel_end;
1292   asection *sreloc;
1293
1294   if (info->relocatable)
1295     return TRUE;
1296
1297   BFD_ASSERT (is_i386_elf (abfd));
1298
1299   htab = elf_i386_hash_table (info);
1300   if (htab == NULL)
1301     return FALSE;
1302
1303   symtab_hdr = &elf_symtab_hdr (abfd);
1304   sym_hashes = elf_sym_hashes (abfd);
1305
1306   sreloc = NULL;
1307
1308   rel_end = relocs + sec->reloc_count;
1309   for (rel = relocs; rel < rel_end; rel++)
1310     {
1311       unsigned int r_type;
1312       unsigned long r_symndx;
1313       struct elf_link_hash_entry *h;
1314       Elf_Internal_Sym *isym;
1315       const char *name;
1316
1317       r_symndx = ELF32_R_SYM (rel->r_info);
1318       r_type = ELF32_R_TYPE (rel->r_info);
1319
1320       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1321         {
1322           (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1323                                  abfd,
1324                                  r_symndx);
1325           return FALSE;
1326         }
1327
1328       if (r_symndx < symtab_hdr->sh_info)
1329         {
1330           /* A local symbol.  */
1331           isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1332                                         abfd, r_symndx);
1333           if (isym == NULL)
1334             return FALSE;
1335
1336           /* Check relocation against local STT_GNU_IFUNC symbol.  */
1337           if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1338             {
1339               h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1340               if (h == NULL)
1341                 return FALSE;
1342
1343               /* Fake a STT_GNU_IFUNC symbol.  */
1344               h->type = STT_GNU_IFUNC;
1345               h->def_regular = 1;
1346               h->ref_regular = 1;
1347               h->forced_local = 1;
1348               h->root.type = bfd_link_hash_defined;
1349             }
1350           else
1351             h = NULL;
1352         }
1353       else
1354         {
1355           isym = NULL;
1356           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1357           while (h->root.type == bfd_link_hash_indirect
1358                  || h->root.type == bfd_link_hash_warning)
1359             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1360         }
1361
1362       if (h != NULL)
1363         {
1364           /* Create the ifunc sections for static executables.  If we
1365              never see an indirect function symbol nor we are building
1366              a static executable, those sections will be empty and
1367              won't appear in output.  */
1368           switch (r_type)
1369             {
1370             default:
1371               break;
1372
1373             case R_386_32:
1374             case R_386_PC32:
1375             case R_386_PLT32:
1376             case R_386_GOT32:
1377             case R_386_GOTOFF:
1378               if (!_bfd_elf_create_ifunc_sections (abfd, info))
1379                 return FALSE;
1380               break;
1381             }
1382
1383           /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1384              it here if it is defined in a non-shared object.  */
1385           if (h->type == STT_GNU_IFUNC
1386               && h->def_regular)
1387             {
1388               /* It is referenced by a non-shared object. */
1389               h->ref_regular = 1;
1390               h->needs_plt = 1;
1391
1392               /* STT_GNU_IFUNC symbol must go through PLT.  */
1393               h->plt.refcount += 1;
1394
1395               /* STT_GNU_IFUNC needs dynamic sections.  */
1396               if (htab->elf.dynobj == NULL)
1397                 htab->elf.dynobj = abfd;
1398
1399               switch (r_type)
1400                 {
1401                 default:
1402                   if (h->root.root.string)
1403                     name = h->root.root.string;
1404                   else
1405                     name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1406                                              NULL);
1407                   (*_bfd_error_handler)
1408                     (_("%B: relocation %s against STT_GNU_IFUNC "
1409                        "symbol `%s' isn't handled by %s"), abfd,
1410                      elf_howto_table[r_type].name,
1411                      name, __FUNCTION__);
1412                   bfd_set_error (bfd_error_bad_value);
1413                   return FALSE;
1414
1415                 case R_386_32:
1416                   h->non_got_ref = 1;
1417                   h->pointer_equality_needed = 1;
1418                   if (info->shared)
1419                     {
1420                       /* We must copy these reloc types into the
1421                          output file.  Create a reloc section in
1422                          dynobj and make room for this reloc.  */
1423                       sreloc = _bfd_elf_create_ifunc_dyn_reloc
1424                         (abfd, info, sec, sreloc,
1425                          &((struct elf_i386_link_hash_entry *) h)->dyn_relocs);
1426                       if (sreloc == NULL)
1427                         return FALSE;
1428                     }
1429                   break;
1430
1431                 case R_386_PC32:
1432                   h->non_got_ref = 1;
1433                   break;
1434
1435                 case R_386_PLT32:
1436                   break;
1437
1438                 case R_386_GOT32:
1439                 case R_386_GOTOFF:
1440                   h->got.refcount += 1;
1441                   if (htab->elf.sgot == NULL
1442                       && !_bfd_elf_create_got_section (htab->elf.dynobj,
1443                                                        info))
1444                     return FALSE;
1445                   break;
1446                 }
1447
1448               continue;
1449             }
1450         }
1451
1452       if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1453                                      symtab_hdr, sym_hashes,
1454                                      &r_type, GOT_UNKNOWN,
1455                                      rel, rel_end, h, r_symndx))
1456         return FALSE;
1457
1458       switch (r_type)
1459         {
1460         case R_386_TLS_LDM:
1461           htab->tls_ldm_got.refcount += 1;
1462           goto create_got;
1463
1464         case R_386_PLT32:
1465           /* This symbol requires a procedure linkage table entry.  We
1466              actually build the entry in adjust_dynamic_symbol,
1467              because this might be a case of linking PIC code which is
1468              never referenced by a dynamic object, in which case we
1469              don't need to generate a procedure linkage table entry
1470              after all.  */
1471
1472           /* If this is a local symbol, we resolve it directly without
1473              creating a procedure linkage table entry.  */
1474           if (h == NULL)
1475             continue;
1476
1477           h->needs_plt = 1;
1478           h->plt.refcount += 1;
1479           break;
1480
1481         case R_386_TLS_IE_32:
1482         case R_386_TLS_IE:
1483         case R_386_TLS_GOTIE:
1484           if (!info->executable)
1485             info->flags |= DF_STATIC_TLS;
1486           /* Fall through */
1487
1488         case R_386_GOT32:
1489         case R_386_TLS_GD:
1490         case R_386_TLS_GOTDESC:
1491         case R_386_TLS_DESC_CALL:
1492           /* This symbol requires a global offset table entry.  */
1493           {
1494             int tls_type, old_tls_type;
1495
1496             switch (r_type)
1497               {
1498               default:
1499               case R_386_GOT32: tls_type = GOT_NORMAL; break;
1500               case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1501               case R_386_TLS_GOTDESC:
1502               case R_386_TLS_DESC_CALL:
1503                 tls_type = GOT_TLS_GDESC; break;
1504               case R_386_TLS_IE_32:
1505                 if (ELF32_R_TYPE (rel->r_info) == r_type)
1506                   tls_type = GOT_TLS_IE_NEG;
1507                 else
1508                   /* If this is a GD->IE transition, we may use either of
1509                      R_386_TLS_TPOFF and R_386_TLS_TPOFF32.  */
1510                   tls_type = GOT_TLS_IE;
1511                 break;
1512               case R_386_TLS_IE:
1513               case R_386_TLS_GOTIE:
1514                 tls_type = GOT_TLS_IE_POS; break;
1515               }
1516
1517             if (h != NULL)
1518               {
1519                 h->got.refcount += 1;
1520                 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1521               }
1522             else
1523               {
1524                 bfd_signed_vma *local_got_refcounts;
1525
1526                 /* This is a global offset table entry for a local symbol.  */
1527                 local_got_refcounts = elf_local_got_refcounts (abfd);
1528                 if (local_got_refcounts == NULL)
1529                   {
1530                     bfd_size_type size;
1531
1532                     size = symtab_hdr->sh_info;
1533                     size *= (sizeof (bfd_signed_vma)
1534                              + sizeof (bfd_vma) + sizeof(char));
1535                     local_got_refcounts = (bfd_signed_vma *)
1536                         bfd_zalloc (abfd, size);
1537                     if (local_got_refcounts == NULL)
1538                       return FALSE;
1539                     elf_local_got_refcounts (abfd) = local_got_refcounts;
1540                     elf_i386_local_tlsdesc_gotent (abfd)
1541                       = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1542                     elf_i386_local_got_tls_type (abfd)
1543                       = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1544                   }
1545                 local_got_refcounts[r_symndx] += 1;
1546                 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1547               }
1548
1549             if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1550               tls_type |= old_tls_type;
1551             /* If a TLS symbol is accessed using IE at least once,
1552                there is no point to use dynamic model for it.  */
1553             else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1554                      && (! GOT_TLS_GD_ANY_P (old_tls_type)
1555                          || (tls_type & GOT_TLS_IE) == 0))
1556               {
1557                 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1558                   tls_type = old_tls_type;
1559                 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1560                          && GOT_TLS_GD_ANY_P (tls_type))
1561                   tls_type |= old_tls_type;
1562                 else
1563                   {
1564                     if (h)
1565                       name = h->root.root.string;
1566                     else
1567                       name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1568                                              NULL);
1569                     (*_bfd_error_handler)
1570                       (_("%B: `%s' accessed both as normal and "
1571                          "thread local symbol"),
1572                        abfd, name);
1573                     return FALSE;
1574                   }
1575               }
1576
1577             if (old_tls_type != tls_type)
1578               {
1579                 if (h != NULL)
1580                   elf_i386_hash_entry (h)->tls_type = tls_type;
1581                 else
1582                   elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1583               }
1584           }
1585           /* Fall through */
1586
1587         case R_386_GOTOFF:
1588         case R_386_GOTPC:
1589         create_got:
1590           if (htab->elf.sgot == NULL)
1591             {
1592               if (htab->elf.dynobj == NULL)
1593                 htab->elf.dynobj = abfd;
1594               if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1595                 return FALSE;
1596             }
1597           if (r_type != R_386_TLS_IE)
1598             break;
1599           /* Fall through */
1600
1601         case R_386_TLS_LE_32:
1602         case R_386_TLS_LE:
1603           if (info->executable)
1604             break;
1605           info->flags |= DF_STATIC_TLS;
1606           /* Fall through */
1607
1608         case R_386_32:
1609         case R_386_PC32:
1610           if (h != NULL && info->executable)
1611             {
1612               /* If this reloc is in a read-only section, we might
1613                  need a copy reloc.  We can't check reliably at this
1614                  stage whether the section is read-only, as input
1615                  sections have not yet been mapped to output sections.
1616                  Tentatively set the flag for now, and correct in
1617                  adjust_dynamic_symbol.  */
1618               h->non_got_ref = 1;
1619
1620               /* We may need a .plt entry if the function this reloc
1621                  refers to is in a shared lib.  */
1622               h->plt.refcount += 1;
1623               if (r_type != R_386_PC32)
1624                 h->pointer_equality_needed = 1;
1625             }
1626
1627           /* If we are creating a shared library, and this is a reloc
1628              against a global symbol, or a non PC relative reloc
1629              against a local symbol, then we need to copy the reloc
1630              into the shared library.  However, if we are linking with
1631              -Bsymbolic, we do not need to copy a reloc against a
1632              global symbol which is defined in an object we are
1633              including in the link (i.e., DEF_REGULAR is set).  At
1634              this point we have not seen all the input files, so it is
1635              possible that DEF_REGULAR is not set now but will be set
1636              later (it is never cleared).  In case of a weak definition,
1637              DEF_REGULAR may be cleared later by a strong definition in
1638              a shared library.  We account for that possibility below by
1639              storing information in the relocs_copied field of the hash
1640              table entry.  A similar situation occurs when creating
1641              shared libraries and symbol visibility changes render the
1642              symbol local.
1643
1644              If on the other hand, we are creating an executable, we
1645              may need to keep relocations for symbols satisfied by a
1646              dynamic library if we manage to avoid copy relocs for the
1647              symbol.  */
1648           if ((info->shared
1649                && (sec->flags & SEC_ALLOC) != 0
1650                && (r_type != R_386_PC32
1651                    || (h != NULL
1652                        && (! SYMBOLIC_BIND (info, h)
1653                            || h->root.type == bfd_link_hash_defweak
1654                            || !h->def_regular))))
1655               || (ELIMINATE_COPY_RELOCS
1656                   && !info->shared
1657                   && (sec->flags & SEC_ALLOC) != 0
1658                   && h != NULL
1659                   && (h->root.type == bfd_link_hash_defweak
1660                       || !h->def_regular)))
1661             {
1662               struct elf_dyn_relocs *p;
1663               struct elf_dyn_relocs **head;
1664
1665               /* We must copy these reloc types into the output file.
1666                  Create a reloc section in dynobj and make room for
1667                  this reloc.  */
1668               if (sreloc == NULL)
1669                 {
1670                   if (htab->elf.dynobj == NULL)
1671                     htab->elf.dynobj = abfd;
1672
1673                   sreloc = _bfd_elf_make_dynamic_reloc_section
1674                     (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1675
1676                   if (sreloc == NULL)
1677                     return FALSE;
1678                 }
1679
1680               /* If this is a global symbol, we count the number of
1681                  relocations we need for this symbol.  */
1682               if (h != NULL)
1683                 {
1684                   head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1685                 }
1686               else
1687                 {
1688                   /* Track dynamic relocs needed for local syms too.
1689                      We really need local syms available to do this
1690                      easily.  Oh well.  */
1691                   void **vpp;
1692                   asection *s;
1693
1694                   isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1695                                                 abfd, r_symndx);
1696                   if (isym == NULL)
1697                     return FALSE;
1698
1699                   s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1700                   if (s == NULL)
1701                     s = sec;
1702
1703                   vpp = &elf_section_data (s)->local_dynrel;
1704                   head = (struct elf_dyn_relocs **)vpp;
1705                 }
1706
1707               p = *head;
1708               if (p == NULL || p->sec != sec)
1709                 {
1710                   bfd_size_type amt = sizeof *p;
1711                   p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1712                                                            amt);
1713                   if (p == NULL)
1714                     return FALSE;
1715                   p->next = *head;
1716                   *head = p;
1717                   p->sec = sec;
1718                   p->count = 0;
1719                   p->pc_count = 0;
1720                 }
1721
1722               p->count += 1;
1723               if (r_type == R_386_PC32)
1724                 p->pc_count += 1;
1725             }
1726           break;
1727
1728           /* This relocation describes the C++ object vtable hierarchy.
1729              Reconstruct it for later use during GC.  */
1730         case R_386_GNU_VTINHERIT:
1731           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1732             return FALSE;
1733           break;
1734
1735           /* This relocation describes which C++ vtable entries are actually
1736              used.  Record for later use during GC.  */
1737         case R_386_GNU_VTENTRY:
1738           BFD_ASSERT (h != NULL);
1739           if (h != NULL
1740               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1741             return FALSE;
1742           break;
1743
1744         default:
1745           break;
1746         }
1747     }
1748
1749   return TRUE;
1750 }
1751
1752 /* Return the section that should be marked against GC for a given
1753    relocation.  */
1754
1755 static asection *
1756 elf_i386_gc_mark_hook (asection *sec,
1757                        struct bfd_link_info *info,
1758                        Elf_Internal_Rela *rel,
1759                        struct elf_link_hash_entry *h,
1760                        Elf_Internal_Sym *sym)
1761 {
1762   if (h != NULL)
1763     switch (ELF32_R_TYPE (rel->r_info))
1764       {
1765       case R_386_GNU_VTINHERIT:
1766       case R_386_GNU_VTENTRY:
1767         return NULL;
1768       }
1769
1770   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1771 }
1772
1773 /* Update the got entry reference counts for the section being removed.  */
1774
1775 static bfd_boolean
1776 elf_i386_gc_sweep_hook (bfd *abfd,
1777                         struct bfd_link_info *info,
1778                         asection *sec,
1779                         const Elf_Internal_Rela *relocs)
1780 {
1781   struct elf_i386_link_hash_table *htab;
1782   Elf_Internal_Shdr *symtab_hdr;
1783   struct elf_link_hash_entry **sym_hashes;
1784   bfd_signed_vma *local_got_refcounts;
1785   const Elf_Internal_Rela *rel, *relend;
1786
1787   if (info->relocatable)
1788     return TRUE;
1789
1790   htab = elf_i386_hash_table (info);
1791   if (htab == NULL)
1792     return FALSE;
1793
1794   elf_section_data (sec)->local_dynrel = NULL;
1795
1796   symtab_hdr = &elf_symtab_hdr (abfd);
1797   sym_hashes = elf_sym_hashes (abfd);
1798   local_got_refcounts = elf_local_got_refcounts (abfd);
1799
1800   relend = relocs + sec->reloc_count;
1801   for (rel = relocs; rel < relend; rel++)
1802     {
1803       unsigned long r_symndx;
1804       unsigned int r_type;
1805       struct elf_link_hash_entry *h = NULL;
1806
1807       r_symndx = ELF32_R_SYM (rel->r_info);
1808       if (r_symndx >= symtab_hdr->sh_info)
1809         {
1810           struct elf_i386_link_hash_entry *eh;
1811           struct elf_dyn_relocs **pp;
1812           struct elf_dyn_relocs *p;
1813
1814           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1815           while (h->root.type == bfd_link_hash_indirect
1816                  || h->root.type == bfd_link_hash_warning)
1817             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1818           eh = (struct elf_i386_link_hash_entry *) h;
1819
1820           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1821             if (p->sec == sec)
1822               {
1823                 /* Everything must go for SEC.  */
1824                 *pp = p->next;
1825                 break;
1826               }
1827         }
1828       else
1829         {
1830           /* A local symbol.  */
1831           Elf_Internal_Sym *isym;
1832
1833           isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1834                                         abfd, r_symndx);
1835
1836           /* Check relocation against local STT_GNU_IFUNC symbol.  */
1837           if (isym != NULL
1838               && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1839             {
1840               h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1841               if (h == NULL)
1842                 abort ();
1843             }
1844         }
1845
1846       r_type = ELF32_R_TYPE (rel->r_info);
1847       if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1848                                      symtab_hdr, sym_hashes,
1849                                      &r_type, GOT_UNKNOWN,
1850                                      rel, relend, h, r_symndx))
1851         return FALSE;
1852
1853       switch (r_type)
1854         {
1855         case R_386_TLS_LDM:
1856           if (htab->tls_ldm_got.refcount > 0)
1857             htab->tls_ldm_got.refcount -= 1;
1858           break;
1859
1860         case R_386_TLS_GD:
1861         case R_386_TLS_GOTDESC:
1862         case R_386_TLS_DESC_CALL:
1863         case R_386_TLS_IE_32:
1864         case R_386_TLS_IE:
1865         case R_386_TLS_GOTIE:
1866         case R_386_GOT32:
1867           if (h != NULL)
1868             {
1869               if (h->got.refcount > 0)
1870                 h->got.refcount -= 1;
1871               if (h->type == STT_GNU_IFUNC)
1872                 {
1873                   if (h->plt.refcount > 0)
1874                     h->plt.refcount -= 1;
1875                 }
1876             }
1877           else if (local_got_refcounts != NULL)
1878             {
1879               if (local_got_refcounts[r_symndx] > 0)
1880                 local_got_refcounts[r_symndx] -= 1;
1881             }
1882           break;
1883
1884         case R_386_32:
1885         case R_386_PC32:
1886           if (info->shared)
1887             break;
1888           /* Fall through */
1889
1890         case R_386_PLT32:
1891           if (h != NULL)
1892             {
1893               if (h->plt.refcount > 0)
1894                 h->plt.refcount -= 1;
1895             }
1896           break;
1897
1898         case R_386_GOTOFF:
1899           if (h != NULL && h->type == STT_GNU_IFUNC)
1900             {
1901               if (h->got.refcount > 0)
1902                 h->got.refcount -= 1;
1903               if (h->plt.refcount > 0)
1904                 h->plt.refcount -= 1;
1905             }
1906           break;
1907
1908         default:
1909           break;
1910         }
1911     }
1912
1913   return TRUE;
1914 }
1915
1916 /* Adjust a symbol defined by a dynamic object and referenced by a
1917    regular object.  The current definition is in some section of the
1918    dynamic object, but we're not including those sections.  We have to
1919    change the definition to something the rest of the link can
1920    understand.  */
1921
1922 static bfd_boolean
1923 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1924                                 struct elf_link_hash_entry *h)
1925 {
1926   struct elf_i386_link_hash_table *htab;
1927   asection *s;
1928
1929   /* STT_GNU_IFUNC symbol must go through PLT. */
1930   if (h->type == STT_GNU_IFUNC)
1931     {
1932       if (h->plt.refcount <= 0)
1933         {
1934           h->plt.offset = (bfd_vma) -1;
1935           h->needs_plt = 0;
1936         }
1937       return TRUE;
1938     }
1939
1940   /* If this is a function, put it in the procedure linkage table.  We
1941      will fill in the contents of the procedure linkage table later,
1942      when we know the address of the .got section.  */
1943   if (h->type == STT_FUNC
1944       || h->needs_plt)
1945     {
1946       if (h->plt.refcount <= 0
1947           || SYMBOL_CALLS_LOCAL (info, h)
1948           || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1949               && h->root.type == bfd_link_hash_undefweak))
1950         {
1951           /* This case can occur if we saw a PLT32 reloc in an input
1952              file, but the symbol was never referred to by a dynamic
1953              object, or if all references were garbage collected.  In
1954              such a case, we don't actually need to build a procedure
1955              linkage table, and we can just do a PC32 reloc instead.  */
1956           h->plt.offset = (bfd_vma) -1;
1957           h->needs_plt = 0;
1958         }
1959
1960       return TRUE;
1961     }
1962   else
1963     /* It's possible that we incorrectly decided a .plt reloc was
1964        needed for an R_386_PC32 reloc to a non-function sym in
1965        check_relocs.  We can't decide accurately between function and
1966        non-function syms in check-relocs;  Objects loaded later in
1967        the link may change h->type.  So fix it now.  */
1968     h->plt.offset = (bfd_vma) -1;
1969
1970   /* If this is a weak symbol, and there is a real definition, the
1971      processor independent code will have arranged for us to see the
1972      real definition first, and we can just use the same value.  */
1973   if (h->u.weakdef != NULL)
1974     {
1975       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1976                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
1977       h->root.u.def.section = h->u.weakdef->root.u.def.section;
1978       h->root.u.def.value = h->u.weakdef->root.u.def.value;
1979       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1980         h->non_got_ref = h->u.weakdef->non_got_ref;
1981       return TRUE;
1982     }
1983
1984   /* This is a reference to a symbol defined by a dynamic object which
1985      is not a function.  */
1986
1987   /* If we are creating a shared library, we must presume that the
1988      only references to the symbol are via the global offset table.
1989      For such cases we need not do anything here; the relocations will
1990      be handled correctly by relocate_section.  */
1991   if (info->shared)
1992     return TRUE;
1993
1994   /* If there are no references to this symbol that do not use the
1995      GOT, we don't need to generate a copy reloc.  */
1996   if (!h->non_got_ref)
1997     return TRUE;
1998
1999   /* If -z nocopyreloc was given, we won't generate them either.  */
2000   if (info->nocopyreloc)
2001     {
2002       h->non_got_ref = 0;
2003       return TRUE;
2004     }
2005
2006   htab = elf_i386_hash_table (info);
2007   if (htab == NULL)
2008     return FALSE;
2009
2010   /* If there aren't any dynamic relocs in read-only sections, then
2011      we can keep the dynamic relocs and avoid the copy reloc.  This
2012      doesn't work on VxWorks, where we can not have dynamic relocations
2013      (other than copy and jump slot relocations) in an executable.  */
2014   if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
2015     {
2016       struct elf_i386_link_hash_entry * eh;
2017       struct elf_dyn_relocs *p;
2018
2019       eh = (struct elf_i386_link_hash_entry *) h;
2020       for (p = eh->dyn_relocs; p != NULL; p = p->next)
2021         {
2022           s = p->sec->output_section;
2023           if (s != NULL && (s->flags & SEC_READONLY) != 0)
2024             break;
2025         }
2026
2027       if (p == NULL)
2028         {
2029           h->non_got_ref = 0;
2030           return TRUE;
2031         }
2032     }
2033
2034   if (h->size == 0)
2035     {
2036       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2037                              h->root.root.string);
2038       return TRUE;
2039     }
2040
2041   /* We must allocate the symbol in our .dynbss section, which will
2042      become part of the .bss section of the executable.  There will be
2043      an entry for this symbol in the .dynsym section.  The dynamic
2044      object will contain position independent code, so all references
2045      from the dynamic object to this symbol will go through the global
2046      offset table.  The dynamic linker will use the .dynsym entry to
2047      determine the address it must put in the global offset table, so
2048      both the dynamic object and the regular object will refer to the
2049      same memory location for the variable.  */
2050
2051   /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2052      copy the initial value out of the dynamic object and into the
2053      runtime process image.  */
2054   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2055     {
2056       htab->srelbss->size += sizeof (Elf32_External_Rel);
2057       h->needs_copy = 1;
2058     }
2059
2060   s = htab->sdynbss;
2061
2062   return _bfd_elf_adjust_dynamic_copy (h, s);
2063 }
2064
2065 /* Allocate space in .plt, .got and associated reloc sections for
2066    dynamic relocs.  */
2067
2068 static bfd_boolean
2069 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2070 {
2071   struct bfd_link_info *info;
2072   struct elf_i386_link_hash_table *htab;
2073   struct elf_i386_link_hash_entry *eh;
2074   struct elf_dyn_relocs *p;
2075
2076   if (h->root.type == bfd_link_hash_indirect)
2077     return TRUE;
2078
2079   if (h->root.type == bfd_link_hash_warning)
2080     /* When warning symbols are created, they **replace** the "real"
2081        entry in the hash table, thus we never get to see the real
2082        symbol in a hash traversal.  So look at it now.  */
2083     h = (struct elf_link_hash_entry *) h->root.u.i.link;
2084   eh = (struct elf_i386_link_hash_entry *) h;
2085
2086   info = (struct bfd_link_info *) inf;
2087   htab = elf_i386_hash_table (info);
2088   if (htab == NULL)
2089     return FALSE;
2090
2091   /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2092      here if it is defined and referenced in a non-shared object.  */
2093   if (h->type == STT_GNU_IFUNC
2094       && h->def_regular)
2095     return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2096                                                &eh->dyn_relocs,
2097                                                PLT_ENTRY_SIZE, 4);
2098   else if (htab->elf.dynamic_sections_created
2099            && h->plt.refcount > 0)
2100     {
2101       /* Make sure this symbol is output as a dynamic symbol.
2102          Undefined weak syms won't yet be marked as dynamic.  */
2103       if (h->dynindx == -1
2104           && !h->forced_local)
2105         {
2106           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2107             return FALSE;
2108         }
2109
2110       if (info->shared
2111           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2112         {
2113           asection *s = htab->elf.splt;
2114
2115           /* If this is the first .plt entry, make room for the special
2116              first entry.  */
2117           if (s->size == 0)
2118             s->size += PLT_ENTRY_SIZE;
2119
2120           h->plt.offset = s->size;
2121
2122           /* If this symbol is not defined in a regular file, and we are
2123              not generating a shared library, then set the symbol to this
2124              location in the .plt.  This is required to make function
2125              pointers compare as equal between the normal executable and
2126              the shared library.  */
2127           if (! info->shared
2128               && !h->def_regular)
2129             {
2130               h->root.u.def.section = s;
2131               h->root.u.def.value = h->plt.offset;
2132             }
2133
2134           /* Make room for this entry.  */
2135           s->size += PLT_ENTRY_SIZE;
2136
2137           /* We also need to make an entry in the .got.plt section, which
2138              will be placed in the .got section by the linker script.  */
2139           htab->elf.sgotplt->size += 4;
2140
2141           /* We also need to make an entry in the .rel.plt section.  */
2142           htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2143           htab->next_tls_desc_index++;
2144
2145           if (htab->is_vxworks && !info->shared)
2146             {
2147               /* VxWorks has a second set of relocations for each PLT entry
2148                  in executables.  They go in a separate relocation section,
2149                  which is processed by the kernel loader.  */
2150
2151               /* There are two relocations for the initial PLT entry: an
2152                  R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2153                  R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8.  */
2154
2155               if (h->plt.offset == PLT_ENTRY_SIZE)
2156                 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2157
2158               /* There are two extra relocations for each subsequent PLT entry:
2159                  an R_386_32 relocation for the GOT entry, and an R_386_32
2160                  relocation for the PLT entry.  */
2161
2162               htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2163             }
2164         }
2165       else
2166         {
2167           h->plt.offset = (bfd_vma) -1;
2168           h->needs_plt = 0;
2169         }
2170     }
2171   else
2172     {
2173       h->plt.offset = (bfd_vma) -1;
2174       h->needs_plt = 0;
2175     }
2176
2177   eh->tlsdesc_got = (bfd_vma) -1;
2178
2179   /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2180      make it a R_386_TLS_LE_32 requiring no TLS entry.  */
2181   if (h->got.refcount > 0
2182       && info->executable
2183       && h->dynindx == -1
2184       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2185     h->got.offset = (bfd_vma) -1;
2186   else if (h->got.refcount > 0)
2187     {
2188       asection *s;
2189       bfd_boolean dyn;
2190       int tls_type = elf_i386_hash_entry(h)->tls_type;
2191
2192       /* Make sure this symbol is output as a dynamic symbol.
2193          Undefined weak syms won't yet be marked as dynamic.  */
2194       if (h->dynindx == -1
2195           && !h->forced_local)
2196         {
2197           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2198             return FALSE;
2199         }
2200
2201       s = htab->elf.sgot;
2202       if (GOT_TLS_GDESC_P (tls_type))
2203         {
2204           eh->tlsdesc_got = htab->elf.sgotplt->size
2205             - elf_i386_compute_jump_table_size (htab);
2206           htab->elf.sgotplt->size += 8;
2207           h->got.offset = (bfd_vma) -2;
2208         }
2209       if (! GOT_TLS_GDESC_P (tls_type)
2210           || GOT_TLS_GD_P (tls_type))
2211         {
2212           h->got.offset = s->size;
2213           s->size += 4;
2214           /* R_386_TLS_GD needs 2 consecutive GOT slots.  */
2215           if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2216             s->size += 4;
2217         }
2218       dyn = htab->elf.dynamic_sections_created;
2219       /* R_386_TLS_IE_32 needs one dynamic relocation,
2220          R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2221          (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2222          need two), R_386_TLS_GD needs one if local symbol and two if
2223          global.  */
2224       if (tls_type == GOT_TLS_IE_BOTH)
2225         htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2226       else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2227                || (tls_type & GOT_TLS_IE))
2228         htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2229       else if (GOT_TLS_GD_P (tls_type))
2230         htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2231       else if (! GOT_TLS_GDESC_P (tls_type)
2232                && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2233                    || h->root.type != bfd_link_hash_undefweak)
2234                && (info->shared
2235                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2236         htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2237       if (GOT_TLS_GDESC_P (tls_type))
2238         htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2239     }
2240   else
2241     h->got.offset = (bfd_vma) -1;
2242
2243   if (eh->dyn_relocs == NULL)
2244     return TRUE;
2245
2246   /* In the shared -Bsymbolic case, discard space allocated for
2247      dynamic pc-relative relocs against symbols which turn out to be
2248      defined in regular objects.  For the normal shared case, discard
2249      space for pc-relative relocs that have become local due to symbol
2250      visibility changes.  */
2251
2252   if (info->shared)
2253     {
2254       /* The only reloc that uses pc_count is R_386_PC32, which will
2255          appear on a call or on something like ".long foo - .".  We
2256          want calls to protected symbols to resolve directly to the
2257          function rather than going via the plt.  If people want
2258          function pointer comparisons to work as expected then they
2259          should avoid writing assembly like ".long foo - .".  */
2260       if (SYMBOL_CALLS_LOCAL (info, h))
2261         {
2262           struct elf_dyn_relocs **pp;
2263
2264           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2265             {
2266               p->count -= p->pc_count;
2267               p->pc_count = 0;
2268               if (p->count == 0)
2269                 *pp = p->next;
2270               else
2271                 pp = &p->next;
2272             }
2273         }
2274
2275       if (htab->is_vxworks)
2276         {
2277           struct elf_dyn_relocs **pp;
2278           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2279             {
2280               if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2281                 *pp = p->next;
2282               else
2283                 pp = &p->next;
2284             }
2285         }
2286
2287       /* Also discard relocs on undefined weak syms with non-default
2288          visibility.  */
2289       if (eh->dyn_relocs != NULL
2290           && h->root.type == bfd_link_hash_undefweak)
2291         {
2292           if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2293             eh->dyn_relocs = NULL;
2294
2295           /* Make sure undefined weak symbols are output as a dynamic
2296              symbol in PIEs.  */
2297           else if (h->dynindx == -1
2298                    && !h->forced_local)
2299             {
2300               if (! bfd_elf_link_record_dynamic_symbol (info, h))
2301                 return FALSE;
2302             }
2303         }
2304     }
2305   else if (ELIMINATE_COPY_RELOCS)
2306     {
2307       /* For the non-shared case, discard space for relocs against
2308          symbols which turn out to need copy relocs or are not
2309          dynamic.  */
2310
2311       if (!h->non_got_ref
2312           && ((h->def_dynamic
2313                && !h->def_regular)
2314               || (htab->elf.dynamic_sections_created
2315                   && (h->root.type == bfd_link_hash_undefweak
2316                       || h->root.type == bfd_link_hash_undefined))))
2317         {
2318           /* Make sure this symbol is output as a dynamic symbol.
2319              Undefined weak syms won't yet be marked as dynamic.  */
2320           if (h->dynindx == -1
2321               && !h->forced_local)
2322             {
2323               if (! bfd_elf_link_record_dynamic_symbol (info, h))
2324                 return FALSE;
2325             }
2326
2327           /* If that succeeded, we know we'll be keeping all the
2328              relocs.  */
2329           if (h->dynindx != -1)
2330             goto keep;
2331         }
2332
2333       eh->dyn_relocs = NULL;
2334
2335     keep: ;
2336     }
2337
2338   /* Finally, allocate space.  */
2339   for (p = eh->dyn_relocs; p != NULL; p = p->next)
2340     {
2341       asection *sreloc;
2342
2343       sreloc = elf_section_data (p->sec)->sreloc;
2344
2345       BFD_ASSERT (sreloc != NULL);
2346       sreloc->size += p->count * sizeof (Elf32_External_Rel);
2347     }
2348
2349   return TRUE;
2350 }
2351
2352 /* Allocate space in .plt, .got and associated reloc sections for
2353    local dynamic relocs.  */
2354
2355 static bfd_boolean
2356 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2357 {
2358   struct elf_link_hash_entry *h
2359     = (struct elf_link_hash_entry *) *slot;
2360
2361   if (h->type != STT_GNU_IFUNC
2362       || !h->def_regular
2363       || !h->ref_regular
2364       || !h->forced_local
2365       || h->root.type != bfd_link_hash_defined)
2366     abort ();
2367
2368   return elf_i386_allocate_dynrelocs (h, inf);
2369 }
2370
2371 /* Find any dynamic relocs that apply to read-only sections.  */
2372
2373 static bfd_boolean
2374 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2375 {
2376   struct elf_i386_link_hash_entry *eh;
2377   struct elf_dyn_relocs *p;
2378
2379   if (h->root.type == bfd_link_hash_warning)
2380     h = (struct elf_link_hash_entry *) h->root.u.i.link;
2381
2382   eh = (struct elf_i386_link_hash_entry *) h;
2383   for (p = eh->dyn_relocs; p != NULL; p = p->next)
2384     {
2385       asection *s = p->sec->output_section;
2386
2387       if (s != NULL && (s->flags & SEC_READONLY) != 0)
2388         {
2389           struct bfd_link_info *info = (struct bfd_link_info *) inf;
2390
2391           info->flags |= DF_TEXTREL;
2392
2393           /* Not an error, just cut short the traversal.  */
2394           return FALSE;
2395         }
2396     }
2397   return TRUE;
2398 }
2399
2400 /* Set the sizes of the dynamic sections.  */
2401
2402 static bfd_boolean
2403 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2404                                 struct bfd_link_info *info)
2405 {
2406   struct elf_i386_link_hash_table *htab;
2407   bfd *dynobj;
2408   asection *s;
2409   bfd_boolean relocs;
2410   bfd *ibfd;
2411
2412   htab = elf_i386_hash_table (info);
2413   if (htab == NULL)
2414     return FALSE;
2415   dynobj = htab->elf.dynobj;
2416   if (dynobj == NULL)
2417     abort ();
2418
2419   if (htab->elf.dynamic_sections_created)
2420     {
2421       /* Set the contents of the .interp section to the interpreter.  */
2422       if (info->executable)
2423         {
2424           s = bfd_get_section_by_name (dynobj, ".interp");
2425           if (s == NULL)
2426             abort ();
2427           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2428           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2429         }
2430     }
2431
2432   /* Set up .got offsets for local syms, and space for local dynamic
2433      relocs.  */
2434   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2435     {
2436       bfd_signed_vma *local_got;
2437       bfd_signed_vma *end_local_got;
2438       char *local_tls_type;
2439       bfd_vma *local_tlsdesc_gotent;
2440       bfd_size_type locsymcount;
2441       Elf_Internal_Shdr *symtab_hdr;
2442       asection *srel;
2443
2444       if (! is_i386_elf (ibfd))
2445         continue;
2446
2447       for (s = ibfd->sections; s != NULL; s = s->next)
2448         {
2449           struct elf_dyn_relocs *p;
2450
2451           for (p = ((struct elf_dyn_relocs *)
2452                      elf_section_data (s)->local_dynrel);
2453                p != NULL;
2454                p = p->next)
2455             {
2456               if (!bfd_is_abs_section (p->sec)
2457                   && bfd_is_abs_section (p->sec->output_section))
2458                 {
2459                   /* Input section has been discarded, either because
2460                      it is a copy of a linkonce section or due to
2461                      linker script /DISCARD/, so we'll be discarding
2462                      the relocs too.  */
2463                 }
2464               else if (htab->is_vxworks
2465                        && strcmp (p->sec->output_section->name,
2466                                   ".tls_vars") == 0)
2467                 {
2468                   /* Relocations in vxworks .tls_vars sections are
2469                      handled specially by the loader.  */
2470                 }
2471               else if (p->count != 0)
2472                 {
2473                   srel = elf_section_data (p->sec)->sreloc;
2474                   srel->size += p->count * sizeof (Elf32_External_Rel);
2475                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2476                     info->flags |= DF_TEXTREL;
2477                 }
2478             }
2479         }
2480
2481       local_got = elf_local_got_refcounts (ibfd);
2482       if (!local_got)
2483         continue;
2484
2485       symtab_hdr = &elf_symtab_hdr (ibfd);
2486       locsymcount = symtab_hdr->sh_info;
2487       end_local_got = local_got + locsymcount;
2488       local_tls_type = elf_i386_local_got_tls_type (ibfd);
2489       local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2490       s = htab->elf.sgot;
2491       srel = htab->elf.srelgot;
2492       for (; local_got < end_local_got;
2493            ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2494         {
2495           *local_tlsdesc_gotent = (bfd_vma) -1;
2496           if (*local_got > 0)
2497             {
2498               if (GOT_TLS_GDESC_P (*local_tls_type))
2499                 {
2500                   *local_tlsdesc_gotent = htab->elf.sgotplt->size
2501                     - elf_i386_compute_jump_table_size (htab);
2502                   htab->elf.sgotplt->size += 8;
2503                   *local_got = (bfd_vma) -2;
2504                 }
2505               if (! GOT_TLS_GDESC_P (*local_tls_type)
2506                   || GOT_TLS_GD_P (*local_tls_type))
2507                 {
2508                   *local_got = s->size;
2509                   s->size += 4;
2510                   if (GOT_TLS_GD_P (*local_tls_type)
2511                       || *local_tls_type == GOT_TLS_IE_BOTH)
2512                     s->size += 4;
2513                 }
2514               if (info->shared
2515                   || GOT_TLS_GD_ANY_P (*local_tls_type)
2516                   || (*local_tls_type & GOT_TLS_IE))
2517                 {
2518                   if (*local_tls_type == GOT_TLS_IE_BOTH)
2519                     srel->size += 2 * sizeof (Elf32_External_Rel);
2520                   else if (GOT_TLS_GD_P (*local_tls_type)
2521                            || ! GOT_TLS_GDESC_P (*local_tls_type))
2522                     srel->size += sizeof (Elf32_External_Rel);
2523                   if (GOT_TLS_GDESC_P (*local_tls_type))
2524                     htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2525                 }
2526             }
2527           else
2528             *local_got = (bfd_vma) -1;
2529         }
2530     }
2531
2532   if (htab->tls_ldm_got.refcount > 0)
2533     {
2534       /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2535          relocs.  */
2536       htab->tls_ldm_got.offset = htab->elf.sgot->size;
2537       htab->elf.sgot->size += 8;
2538       htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2539     }
2540   else
2541     htab->tls_ldm_got.offset = -1;
2542
2543   /* Allocate global sym .plt and .got entries, and space for global
2544      sym dynamic relocs.  */
2545   elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2546
2547   /* Allocate .plt and .got entries, and space for local symbols.  */
2548   htab_traverse (htab->loc_hash_table,
2549                  elf_i386_allocate_local_dynrelocs,
2550                  info);
2551
2552   /* For every jump slot reserved in the sgotplt, reloc_count is
2553      incremented.  However, when we reserve space for TLS descriptors,
2554      it's not incremented, so in order to compute the space reserved
2555      for them, it suffices to multiply the reloc count by the jump
2556      slot size.  */
2557   if (htab->elf.srelplt)
2558     htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2559
2560   if (htab->elf.sgotplt)
2561     {
2562       struct elf_link_hash_entry *got;
2563       got = elf_link_hash_lookup (elf_hash_table (info),
2564                                   "_GLOBAL_OFFSET_TABLE_",
2565                                   FALSE, FALSE, FALSE);
2566
2567       /* Don't allocate .got.plt section if there are no GOT nor PLT
2568          entries and there is no refeence to _GLOBAL_OFFSET_TABLE_.  */
2569       if ((got == NULL
2570            || !got->ref_regular_nonweak)
2571           && (htab->elf.sgotplt->size
2572               == get_elf_backend_data (output_bfd)->got_header_size)
2573           && (htab->elf.splt == NULL
2574               || htab->elf.splt->size == 0)
2575           && (htab->elf.sgot == NULL
2576               || htab->elf.sgot->size == 0)
2577           && (htab->elf.iplt == NULL
2578               || htab->elf.iplt->size == 0)
2579           && (htab->elf.igotplt == NULL
2580               || htab->elf.igotplt->size == 0))
2581         htab->elf.sgotplt->size = 0;
2582     }
2583
2584   /* We now have determined the sizes of the various dynamic sections.
2585      Allocate memory for them.  */
2586   relocs = FALSE;
2587   for (s = dynobj->sections; s != NULL; s = s->next)
2588     {
2589       bfd_boolean strip_section = TRUE;
2590
2591       if ((s->flags & SEC_LINKER_CREATED) == 0)
2592         continue;
2593
2594       if (s == htab->elf.splt
2595           || s == htab->elf.sgot
2596           || s == htab->elf.sgotplt
2597           || s == htab->elf.iplt
2598           || s == htab->elf.igotplt
2599           || s == htab->sdynbss)
2600         {
2601           /* Strip this section if we don't need it; see the
2602              comment below.  */
2603           /* We'd like to strip these sections if they aren't needed, but if
2604              we've exported dynamic symbols from them we must leave them.
2605              It's too late to tell BFD to get rid of the symbols.  */
2606
2607           if (htab->elf.hplt != NULL)
2608             strip_section = FALSE;
2609         }
2610       else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2611         {
2612           if (s->size != 0
2613               && s != htab->elf.srelplt
2614               && s != htab->srelplt2)
2615             relocs = TRUE;
2616
2617           /* We use the reloc_count field as a counter if we need
2618              to copy relocs into the output file.  */
2619           s->reloc_count = 0;
2620         }
2621       else
2622         {
2623           /* It's not one of our sections, so don't allocate space.  */
2624           continue;
2625         }
2626
2627       if (s->size == 0)
2628         {
2629           /* If we don't need this section, strip it from the
2630              output file.  This is mostly to handle .rel.bss and
2631              .rel.plt.  We must create both sections in
2632              create_dynamic_sections, because they must be created
2633              before the linker maps input sections to output
2634              sections.  The linker does that before
2635              adjust_dynamic_symbol is called, and it is that
2636              function which decides whether anything needs to go
2637              into these sections.  */
2638           if (strip_section)
2639             s->flags |= SEC_EXCLUDE;
2640           continue;
2641         }
2642
2643       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2644         continue;
2645
2646       /* Allocate memory for the section contents.  We use bfd_zalloc
2647          here in case unused entries are not reclaimed before the
2648          section's contents are written out.  This should not happen,
2649          but this way if it does, we get a R_386_NONE reloc instead
2650          of garbage.  */
2651       s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2652       if (s->contents == NULL)
2653         return FALSE;
2654     }
2655
2656   if (htab->elf.dynamic_sections_created)
2657     {
2658       /* Add some entries to the .dynamic section.  We fill in the
2659          values later, in elf_i386_finish_dynamic_sections, but we
2660          must add the entries now so that we get the correct size for
2661          the .dynamic section.  The DT_DEBUG entry is filled in by the
2662          dynamic linker and used by the debugger.  */
2663 #define add_dynamic_entry(TAG, VAL) \
2664   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2665
2666       if (info->executable)
2667         {
2668           if (!add_dynamic_entry (DT_DEBUG, 0))
2669             return FALSE;
2670         }
2671
2672       if (htab->elf.splt->size != 0)
2673         {
2674           if (!add_dynamic_entry (DT_PLTGOT, 0)
2675               || !add_dynamic_entry (DT_PLTRELSZ, 0)
2676               || !add_dynamic_entry (DT_PLTREL, DT_REL)
2677               || !add_dynamic_entry (DT_JMPREL, 0))
2678             return FALSE;
2679         }
2680
2681       if (relocs)
2682         {
2683           if (!add_dynamic_entry (DT_REL, 0)
2684               || !add_dynamic_entry (DT_RELSZ, 0)
2685               || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2686             return FALSE;
2687
2688           /* If any dynamic relocs apply to a read-only section,
2689              then we need a DT_TEXTREL entry.  */
2690           if ((info->flags & DF_TEXTREL) == 0)
2691             elf_link_hash_traverse (&htab->elf,
2692                                     elf_i386_readonly_dynrelocs, info);
2693
2694           if ((info->flags & DF_TEXTREL) != 0)
2695             {
2696               if (!add_dynamic_entry (DT_TEXTREL, 0))
2697                 return FALSE;
2698             }
2699         }
2700       if (htab->is_vxworks
2701           && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2702         return FALSE;
2703     }
2704 #undef add_dynamic_entry
2705
2706   return TRUE;
2707 }
2708
2709 static bfd_boolean
2710 elf_i386_always_size_sections (bfd *output_bfd,
2711                                struct bfd_link_info *info)
2712 {
2713   asection *tls_sec = elf_hash_table (info)->tls_sec;
2714
2715   if (tls_sec)
2716     {
2717       struct elf_link_hash_entry *tlsbase;
2718
2719       tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2720                                       "_TLS_MODULE_BASE_",
2721                                       FALSE, FALSE, FALSE);
2722
2723       if (tlsbase && tlsbase->type == STT_TLS)
2724         {
2725           struct elf_i386_link_hash_table *htab;
2726           struct bfd_link_hash_entry *bh = NULL;
2727           const struct elf_backend_data *bed
2728             = get_elf_backend_data (output_bfd);
2729
2730           htab = elf_i386_hash_table (info);
2731           if (htab == NULL)
2732             return FALSE;
2733
2734           if (!(_bfd_generic_link_add_one_symbol
2735                 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2736                  tls_sec, 0, NULL, FALSE,
2737                  bed->collect, &bh)))
2738             return FALSE;
2739
2740           htab->tls_module_base = bh;
2741
2742           tlsbase = (struct elf_link_hash_entry *)bh;
2743           tlsbase->def_regular = 1;
2744           tlsbase->other = STV_HIDDEN;
2745           (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2746         }
2747     }
2748
2749   return TRUE;
2750 }
2751
2752 /* Set the correct type for an x86 ELF section.  We do this by the
2753    section name, which is a hack, but ought to work.  */
2754
2755 static bfd_boolean
2756 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2757                         Elf_Internal_Shdr *hdr,
2758                         asection *sec)
2759 {
2760   const char *name;
2761
2762   name = bfd_get_section_name (abfd, sec);
2763
2764   /* This is an ugly, but unfortunately necessary hack that is
2765      needed when producing EFI binaries on x86. It tells
2766      elf.c:elf_fake_sections() not to consider ".reloc" as a section
2767      containing ELF relocation info.  We need this hack in order to
2768      be able to generate ELF binaries that can be translated into
2769      EFI applications (which are essentially COFF objects).  Those
2770      files contain a COFF ".reloc" section inside an ELFNN object,
2771      which would normally cause BFD to segfault because it would
2772      attempt to interpret this section as containing relocation
2773      entries for section "oc".  With this hack enabled, ".reloc"
2774      will be treated as a normal data section, which will avoid the
2775      segfault.  However, you won't be able to create an ELFNN binary
2776      with a section named "oc" that needs relocations, but that's
2777      the kind of ugly side-effects you get when detecting section
2778      types based on their names...  In practice, this limitation is
2779      unlikely to bite.  */
2780   if (strcmp (name, ".reloc") == 0)
2781     hdr->sh_type = SHT_PROGBITS;
2782
2783   return TRUE;
2784 }
2785
2786 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2787    executables.  Rather than setting it to the beginning of the TLS
2788    section, we have to set it to the end.    This function may be called
2789    multiple times, it is idempotent.  */
2790
2791 static void
2792 elf_i386_set_tls_module_base (struct bfd_link_info *info)
2793 {
2794   struct elf_i386_link_hash_table *htab;
2795   struct bfd_link_hash_entry *base;
2796
2797   if (!info->executable)
2798     return;
2799
2800   htab = elf_i386_hash_table (info);
2801   if (htab == NULL)
2802     return;
2803
2804   base = htab->tls_module_base;
2805   if (base == NULL)
2806     return;
2807
2808   base->u.def.value = htab->elf.tls_size;
2809 }
2810
2811 /* Return the base VMA address which should be subtracted from real addresses
2812    when resolving @dtpoff relocation.
2813    This is PT_TLS segment p_vaddr.  */
2814
2815 static bfd_vma
2816 elf_i386_dtpoff_base (struct bfd_link_info *info)
2817 {
2818   /* If tls_sec is NULL, we should have signalled an error already.  */
2819   if (elf_hash_table (info)->tls_sec == NULL)
2820     return 0;
2821   return elf_hash_table (info)->tls_sec->vma;
2822 }
2823
2824 /* Return the relocation value for @tpoff relocation
2825    if STT_TLS virtual address is ADDRESS.  */
2826
2827 static bfd_vma
2828 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2829 {
2830   struct elf_link_hash_table *htab = elf_hash_table (info);
2831
2832   /* If tls_sec is NULL, we should have signalled an error already.  */
2833   if (htab->tls_sec == NULL)
2834     return 0;
2835   return htab->tls_size + htab->tls_sec->vma - address;
2836 }
2837
2838 /* Relocate an i386 ELF section.  */
2839
2840 static bfd_boolean
2841 elf_i386_relocate_section (bfd *output_bfd,
2842                            struct bfd_link_info *info,
2843                            bfd *input_bfd,
2844                            asection *input_section,
2845                            bfd_byte *contents,
2846                            Elf_Internal_Rela *relocs,
2847                            Elf_Internal_Sym *local_syms,
2848                            asection **local_sections)
2849 {
2850   struct elf_i386_link_hash_table *htab;
2851   Elf_Internal_Shdr *symtab_hdr;
2852   struct elf_link_hash_entry **sym_hashes;
2853   bfd_vma *local_got_offsets;
2854   bfd_vma *local_tlsdesc_gotents;
2855   Elf_Internal_Rela *rel;
2856   Elf_Internal_Rela *relend;
2857   bfd_boolean is_vxworks_tls;
2858
2859   BFD_ASSERT (is_i386_elf (input_bfd));
2860
2861   htab = elf_i386_hash_table (info);
2862   if (htab == NULL)
2863     return FALSE;
2864   symtab_hdr = &elf_symtab_hdr (input_bfd);
2865   sym_hashes = elf_sym_hashes (input_bfd);
2866   local_got_offsets = elf_local_got_offsets (input_bfd);
2867   local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2868   /* We have to handle relocations in vxworks .tls_vars sections
2869      specially, because the dynamic loader is 'weird'.  */
2870   is_vxworks_tls = (htab->is_vxworks && info->shared
2871                     && !strcmp (input_section->output_section->name,
2872                                 ".tls_vars"));
2873
2874   elf_i386_set_tls_module_base (info);
2875
2876   rel = relocs;
2877   relend = relocs + input_section->reloc_count;
2878   for (; rel < relend; rel++)
2879     {
2880       unsigned int r_type;
2881       reloc_howto_type *howto;
2882       unsigned long r_symndx;
2883       struct elf_link_hash_entry *h;
2884       Elf_Internal_Sym *sym;
2885       asection *sec;
2886       bfd_vma off, offplt;
2887       bfd_vma relocation;
2888       bfd_boolean unresolved_reloc;
2889       bfd_reloc_status_type r;
2890       unsigned int indx;
2891       int tls_type;
2892
2893       r_type = ELF32_R_TYPE (rel->r_info);
2894       if (r_type == R_386_GNU_VTINHERIT
2895           || r_type == R_386_GNU_VTENTRY)
2896         continue;
2897
2898       if ((indx = r_type) >= R_386_standard
2899           && ((indx = r_type - R_386_ext_offset) - R_386_standard
2900               >= R_386_ext - R_386_standard)
2901           && ((indx = r_type - R_386_tls_offset) - R_386_ext
2902               >= R_386_irelative - R_386_ext))
2903         {
2904           (*_bfd_error_handler)
2905             (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2906              input_bfd, input_section, r_type);
2907           bfd_set_error (bfd_error_bad_value);
2908           return FALSE;
2909         }
2910       howto = elf_howto_table + indx;
2911
2912       r_symndx = ELF32_R_SYM (rel->r_info);
2913       h = NULL;
2914       sym = NULL;
2915       sec = NULL;
2916       unresolved_reloc = FALSE;
2917       if (r_symndx < symtab_hdr->sh_info)
2918         {
2919           sym = local_syms + r_symndx;
2920           sec = local_sections[r_symndx];
2921           relocation = (sec->output_section->vma
2922                         + sec->output_offset
2923                         + sym->st_value);
2924
2925           if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2926               && ((sec->flags & SEC_MERGE) != 0
2927                   || (info->relocatable
2928                       && sec->output_offset != 0)))
2929             {
2930               bfd_vma addend;
2931               bfd_byte *where = contents + rel->r_offset;
2932
2933               switch (howto->size)
2934                 {
2935                 case 0:
2936                   addend = bfd_get_8 (input_bfd, where);
2937                   if (howto->pc_relative)
2938                     {
2939                       addend = (addend ^ 0x80) - 0x80;
2940                       addend += 1;
2941                     }
2942                   break;
2943                 case 1:
2944                   addend = bfd_get_16 (input_bfd, where);
2945                   if (howto->pc_relative)
2946                     {
2947                       addend = (addend ^ 0x8000) - 0x8000;
2948                       addend += 2;
2949                     }
2950                   break;
2951                 case 2:
2952                   addend = bfd_get_32 (input_bfd, where);
2953                   if (howto->pc_relative)
2954                     {
2955                       addend = (addend ^ 0x80000000) - 0x80000000;
2956                       addend += 4;
2957                     }
2958                   break;
2959                 default:
2960                   abort ();
2961                 }
2962
2963               if (info->relocatable)
2964                 addend += sec->output_offset;
2965               else
2966                 {
2967                   asection *msec = sec;
2968                   addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2969                                                    addend);
2970                   addend -= relocation;
2971                   addend += msec->output_section->vma + msec->output_offset;
2972                 }
2973
2974               switch (howto->size)
2975                 {
2976                 case 0:
2977                   /* FIXME: overflow checks.  */
2978                   if (howto->pc_relative)
2979                     addend -= 1;
2980                   bfd_put_8 (input_bfd, addend, where);
2981                   break;
2982                 case 1:
2983                   if (howto->pc_relative)
2984                     addend -= 2;
2985                   bfd_put_16 (input_bfd, addend, where);
2986                   break;
2987                 case 2:
2988                   if (howto->pc_relative)
2989                     addend -= 4;
2990                   bfd_put_32 (input_bfd, addend, where);
2991                   break;
2992                 }
2993             }
2994           else if (!info->relocatable
2995                    && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2996             {
2997               /* Relocate against local STT_GNU_IFUNC symbol.  */
2998               h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
2999                                                FALSE);
3000               if (h == NULL)
3001                 abort ();
3002
3003               /* Set STT_GNU_IFUNC symbol value.  */
3004               h->root.u.def.value = sym->st_value;
3005               h->root.u.def.section = sec;
3006             }
3007         }
3008       else
3009         {
3010           bfd_boolean warned ATTRIBUTE_UNUSED;
3011
3012           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3013                                    r_symndx, symtab_hdr, sym_hashes,
3014                                    h, sec, relocation,
3015                                    unresolved_reloc, warned);
3016         }
3017
3018       if (sec != NULL && elf_discarded_section (sec))
3019         RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3020                                          rel, relend, howto, contents);
3021
3022       if (info->relocatable)
3023         continue;
3024
3025       /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3026          it here if it is defined in a non-shared object.  */
3027       if (h != NULL
3028           && h->type == STT_GNU_IFUNC
3029           && h->def_regular)
3030         {
3031           asection *plt, *gotplt, *base_got;
3032           bfd_vma plt_index;
3033           const char *name;
3034
3035           if ((input_section->flags & SEC_ALLOC) == 0
3036               || h->plt.offset == (bfd_vma) -1)
3037             abort ();
3038
3039           /* STT_GNU_IFUNC symbol must go through PLT.  */
3040           if (htab->elf.splt != NULL)
3041             {
3042               plt = htab->elf.splt;
3043               gotplt = htab->elf.sgotplt;
3044             }
3045           else
3046             {
3047               plt = htab->elf.iplt;
3048               gotplt = htab->elf.igotplt;
3049             }
3050
3051           relocation = (plt->output_section->vma
3052                         + plt->output_offset + h->plt.offset);
3053
3054           switch (r_type)
3055             {
3056             default:
3057               if (h->root.root.string)
3058                 name = h->root.root.string;
3059               else
3060                 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3061                                          NULL);
3062               (*_bfd_error_handler)
3063                 (_("%B: relocation %s against STT_GNU_IFUNC "
3064                    "symbol `%s' isn't handled by %s"), input_bfd,
3065                  elf_howto_table[r_type].name,
3066                  name, __FUNCTION__);
3067               bfd_set_error (bfd_error_bad_value);
3068               return FALSE;
3069
3070             case R_386_32:
3071               /* Generate dynamic relcoation only when there is a
3072                  non-GOF reference in a shared object.  */
3073               if (info->shared && h->non_got_ref)
3074                 {
3075                   Elf_Internal_Rela outrel;
3076                   bfd_byte *loc;
3077                   asection *sreloc;
3078                   bfd_vma offset;
3079
3080                   /* Need a dynamic relocation to get the real function
3081                      adddress.  */
3082                   offset = _bfd_elf_section_offset (output_bfd,
3083                                                     info,
3084                                                     input_section,
3085                                                     rel->r_offset);
3086                   if (offset == (bfd_vma) -1
3087                       || offset == (bfd_vma) -2)
3088                     abort ();
3089
3090                   outrel.r_offset = (input_section->output_section->vma
3091                                      + input_section->output_offset
3092                                      + offset);
3093
3094                   if (h->dynindx == -1
3095                       || h->forced_local
3096                       || info->executable)
3097                     {
3098                       /* This symbol is resolved locally.  */
3099                       outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3100                       bfd_put_32 (output_bfd,
3101                                   (h->root.u.def.value
3102                                    + h->root.u.def.section->output_section->vma
3103                                    + h->root.u.def.section->output_offset),
3104                                   contents + offset);
3105                     }
3106                   else
3107                     outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3108
3109                   sreloc = htab->elf.irelifunc;
3110                   loc = sreloc->contents;
3111                   loc += (sreloc->reloc_count++
3112                           * sizeof (Elf32_External_Rel));
3113                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3114
3115                   /* If this reloc is against an external symbol, we
3116                      do not want to fiddle with the addend.  Otherwise,
3117                      we need to include the symbol value so that it
3118                      becomes an addend for the dynamic reloc.  For an
3119                      internal symbol, we have updated addend.  */
3120                   continue;
3121                 }
3122
3123             case R_386_PC32:
3124             case R_386_PLT32:
3125               goto do_relocation;
3126
3127             case R_386_GOT32:
3128               base_got = htab->elf.sgot;
3129               off = h->got.offset;
3130
3131               if (base_got == NULL)
3132                 abort ();
3133
3134               if (off == (bfd_vma) -1)
3135                 {
3136                   /* We can't use h->got.offset here to save state, or
3137                      even just remember the offset, as finish_dynamic_symbol
3138                      would use that as offset into .got.  */
3139
3140                   if (htab->elf.splt != NULL)
3141                     {
3142                       plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3143                       off = (plt_index + 3) * 4;
3144                       base_got = htab->elf.sgotplt;
3145                     }
3146                   else
3147                     {
3148                       plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3149                       off = plt_index * 4;
3150                       base_got = htab->elf.igotplt;
3151                     }
3152
3153                   if (h->dynindx == -1
3154                       || h->forced_local
3155                       || info->symbolic)
3156                     {
3157                       /* This references the local defitionion.  We must
3158                          initialize this entry in the global offset table.
3159                          Since the offset must always be a multiple of 8,
3160                          we use the least significant bit to record
3161                          whether we have initialized it already.
3162
3163                          When doing a dynamic link, we create a .rela.got
3164                          relocation entry to initialize the value.  This
3165                          is done in the finish_dynamic_symbol routine.   */
3166                       if ((off & 1) != 0)
3167                         off &= ~1;
3168                       else
3169                         {
3170                           bfd_put_32 (output_bfd, relocation,
3171                                       base_got->contents + off);
3172                           h->got.offset |= 1;
3173                         }
3174                     }
3175
3176                   relocation = off;
3177
3178                   /* Adjust for static executables.  */
3179                   if (htab->elf.splt == NULL)
3180                     relocation += gotplt->output_offset;
3181                 }
3182               else
3183                 {
3184                   relocation = (base_got->output_section->vma
3185                                 + base_got->output_offset + off
3186                                 - gotplt->output_section->vma
3187                                 - gotplt->output_offset);
3188                   /* Adjust for static executables.  */
3189                   if (htab->elf.splt == NULL)
3190                     relocation += gotplt->output_offset;
3191                 }
3192
3193               goto do_relocation;
3194
3195             case R_386_GOTOFF:
3196               relocation -= (gotplt->output_section->vma
3197                              + gotplt->output_offset);
3198               goto do_relocation;
3199             }
3200         }
3201
3202       switch (r_type)
3203         {
3204         case R_386_GOT32:
3205           /* Relocation is to the entry for this symbol in the global
3206              offset table.  */
3207           if (htab->elf.sgot == NULL)
3208             abort ();
3209
3210           if (h != NULL)
3211             {
3212               bfd_boolean dyn;
3213
3214               off = h->got.offset;
3215               dyn = htab->elf.dynamic_sections_created;
3216               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3217                   || (info->shared
3218                       && SYMBOL_REFERENCES_LOCAL (info, h))
3219                   || (ELF_ST_VISIBILITY (h->other)
3220                       && h->root.type == bfd_link_hash_undefweak))
3221                 {
3222                   /* This is actually a static link, or it is a
3223                      -Bsymbolic link and the symbol is defined
3224                      locally, or the symbol was forced to be local
3225                      because of a version file.  We must initialize
3226                      this entry in the global offset table.  Since the
3227                      offset must always be a multiple of 4, we use the
3228                      least significant bit to record whether we have
3229                      initialized it already.
3230
3231                      When doing a dynamic link, we create a .rel.got
3232                      relocation entry to initialize the value.  This
3233                      is done in the finish_dynamic_symbol routine.  */
3234                   if ((off & 1) != 0)
3235                     off &= ~1;
3236                   else
3237                     {
3238                       bfd_put_32 (output_bfd, relocation,
3239                                   htab->elf.sgot->contents + off);
3240                       h->got.offset |= 1;
3241                     }
3242                 }
3243               else
3244                 unresolved_reloc = FALSE;
3245             }
3246           else
3247             {
3248               if (local_got_offsets == NULL)
3249                 abort ();
3250
3251               off = local_got_offsets[r_symndx];
3252
3253               /* The offset must always be a multiple of 4.  We use
3254                  the least significant bit to record whether we have
3255                  already generated the necessary reloc.  */
3256               if ((off & 1) != 0)
3257                 off &= ~1;
3258               else
3259                 {
3260                   bfd_put_32 (output_bfd, relocation,
3261                               htab->elf.sgot->contents + off);
3262
3263                   if (info->shared)
3264                     {
3265                       asection *s;
3266                       Elf_Internal_Rela outrel;
3267                       bfd_byte *loc;
3268
3269                       s = htab->elf.srelgot;
3270                       if (s == NULL)
3271                         abort ();
3272
3273                       outrel.r_offset = (htab->elf.sgot->output_section->vma
3274                                          + htab->elf.sgot->output_offset
3275                                          + off);
3276                       outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3277                       loc = s->contents;
3278                       loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
3279                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3280                     }
3281
3282                   local_got_offsets[r_symndx] |= 1;
3283                 }
3284             }
3285
3286           if (off >= (bfd_vma) -2)
3287             abort ();
3288
3289           relocation = htab->elf.sgot->output_section->vma
3290                        + htab->elf.sgot->output_offset + off
3291                        - htab->elf.sgotplt->output_section->vma
3292                        - htab->elf.sgotplt->output_offset;
3293           break;
3294
3295         case R_386_GOTOFF:
3296           /* Relocation is relative to the start of the global offset
3297              table.  */
3298
3299           /* Check to make sure it isn't a protected function symbol
3300              for shared library since it may not be local when used
3301              as function address.  We also need to make sure that a
3302              symbol is defined locally.  */
3303           if (info->shared && h)
3304             {
3305               if (!h->def_regular)
3306                 {
3307                   const char *v;
3308
3309                   switch (ELF_ST_VISIBILITY (h->other))
3310                     {
3311                     case STV_HIDDEN:
3312                       v = _("hidden symbol");
3313                       break;
3314                     case STV_INTERNAL:
3315                       v = _("internal symbol");
3316                       break;
3317                     case STV_PROTECTED:
3318                       v = _("protected symbol");
3319                       break;
3320                     default:
3321                       v = _("symbol");
3322                       break;
3323                     }
3324
3325                   (*_bfd_error_handler)
3326                     (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3327                      input_bfd, v, h->root.root.string);
3328                   bfd_set_error (bfd_error_bad_value);
3329                   return FALSE;
3330                 }
3331               else if (!info->executable
3332                        && h->type == STT_FUNC
3333                        && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3334                 {
3335                   (*_bfd_error_handler)
3336                     (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3337                      input_bfd, h->root.root.string);
3338                   bfd_set_error (bfd_error_bad_value);
3339                   return FALSE;
3340                 }
3341             }
3342
3343           /* Note that sgot is not involved in this
3344              calculation.  We always want the start of .got.plt.  If we
3345              defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3346              permitted by the ABI, we might have to change this
3347              calculation.  */
3348           relocation -= htab->elf.sgotplt->output_section->vma
3349                         + htab->elf.sgotplt->output_offset;
3350           break;
3351
3352         case R_386_GOTPC:
3353           /* Use global offset table as symbol value.  */
3354           relocation = htab->elf.sgotplt->output_section->vma
3355                        + htab->elf.sgotplt->output_offset;
3356           unresolved_reloc = FALSE;
3357           break;
3358
3359         case R_386_PLT32:
3360           /* Relocation is to the entry for this symbol in the
3361              procedure linkage table.  */
3362
3363           /* Resolve a PLT32 reloc against a local symbol directly,
3364              without using the procedure linkage table.  */
3365           if (h == NULL)
3366             break;
3367
3368           if (h->plt.offset == (bfd_vma) -1
3369               || htab->elf.splt == NULL)
3370             {
3371               /* We didn't make a PLT entry for this symbol.  This
3372                  happens when statically linking PIC code, or when
3373                  using -Bsymbolic.  */
3374               break;
3375             }
3376
3377           relocation = (htab->elf.splt->output_section->vma
3378                         + htab->elf.splt->output_offset
3379                         + h->plt.offset);
3380           unresolved_reloc = FALSE;
3381           break;
3382
3383         case R_386_32:
3384         case R_386_PC32:
3385           if ((input_section->flags & SEC_ALLOC) == 0
3386               || is_vxworks_tls)
3387             break;
3388
3389           if ((info->shared
3390                && (h == NULL
3391                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3392                    || h->root.type != bfd_link_hash_undefweak)
3393                && (r_type != R_386_PC32
3394                    || !SYMBOL_CALLS_LOCAL (info, h)))
3395               || (ELIMINATE_COPY_RELOCS
3396                   && !info->shared
3397                   && h != NULL
3398                   && h->dynindx != -1
3399                   && !h->non_got_ref
3400                   && ((h->def_dynamic
3401                        && !h->def_regular)
3402                       || h->root.type == bfd_link_hash_undefweak
3403                       || h->root.type == bfd_link_hash_undefined)))
3404             {
3405               Elf_Internal_Rela outrel;
3406               bfd_byte *loc;
3407               bfd_boolean skip, relocate;
3408               asection *sreloc;
3409
3410               /* When generating a shared object, these relocations
3411                  are copied into the output file to be resolved at run
3412                  time.  */
3413
3414               skip = FALSE;
3415               relocate = FALSE;
3416
3417               outrel.r_offset =
3418                 _bfd_elf_section_offset (output_bfd, info, input_section,
3419                                          rel->r_offset);
3420               if (outrel.r_offset == (bfd_vma) -1)
3421                 skip = TRUE;
3422               else if (outrel.r_offset == (bfd_vma) -2)
3423                 skip = TRUE, relocate = TRUE;
3424               outrel.r_offset += (input_section->output_section->vma
3425                                   + input_section->output_offset);
3426
3427               if (skip)
3428                 memset (&outrel, 0, sizeof outrel);
3429               else if (h != NULL
3430                        && h->dynindx != -1
3431                        && (r_type == R_386_PC32
3432                            || !info->shared
3433                            || !SYMBOLIC_BIND (info, h)
3434                            || !h->def_regular))
3435                 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3436               else
3437                 {
3438                   /* This symbol is local, or marked to become local.  */
3439                   relocate = TRUE;
3440                   outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3441                 }
3442
3443               sreloc = elf_section_data (input_section)->sreloc;
3444
3445               BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
3446
3447               loc = sreloc->contents;
3448               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3449
3450               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3451
3452               /* If this reloc is against an external symbol, we do
3453                  not want to fiddle with the addend.  Otherwise, we
3454                  need to include the symbol value so that it becomes
3455                  an addend for the dynamic reloc.  */
3456               if (! relocate)
3457                 continue;
3458             }
3459           break;
3460
3461         case R_386_TLS_IE:
3462           if (!info->executable)
3463             {
3464               Elf_Internal_Rela outrel;
3465               bfd_byte *loc;
3466               asection *sreloc;
3467
3468               outrel.r_offset = rel->r_offset
3469                                 + input_section->output_section->vma
3470                                 + input_section->output_offset;
3471               outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3472               sreloc = elf_section_data (input_section)->sreloc;
3473               if (sreloc == NULL)
3474                 abort ();
3475               loc = sreloc->contents;
3476               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3477               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3478             }
3479           /* Fall through */
3480
3481         case R_386_TLS_GD:
3482         case R_386_TLS_GOTDESC:
3483         case R_386_TLS_DESC_CALL:
3484         case R_386_TLS_IE_32:
3485         case R_386_TLS_GOTIE:
3486           tls_type = GOT_UNKNOWN;
3487           if (h == NULL && local_got_offsets)
3488             tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3489           else if (h != NULL)
3490             tls_type = elf_i386_hash_entry(h)->tls_type;
3491           if (tls_type == GOT_TLS_IE)
3492             tls_type = GOT_TLS_IE_NEG;
3493
3494           if (! elf_i386_tls_transition (info, input_bfd,
3495                                          input_section, contents,
3496                                          symtab_hdr, sym_hashes,
3497                                          &r_type, tls_type, rel,
3498                                          relend, h, r_symndx))
3499             return FALSE;
3500
3501           if (r_type == R_386_TLS_LE_32)
3502             {
3503               BFD_ASSERT (! unresolved_reloc);
3504               if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3505                 {
3506                   unsigned int type;
3507                   bfd_vma roff;
3508
3509                   /* GD->LE transition.  */
3510                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3511                   if (type == 0x04)
3512                     {
3513                       /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3514                          Change it into:
3515                          movl %gs:0, %eax; subl $foo@tpoff, %eax
3516                          (6 byte form of subl).  */
3517                       memcpy (contents + rel->r_offset - 3,
3518                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3519                       roff = rel->r_offset + 5;
3520                     }
3521                   else
3522                     {
3523                       /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3524                          Change it into:
3525                          movl %gs:0, %eax; subl $foo@tpoff, %eax
3526                          (6 byte form of subl).  */
3527                       memcpy (contents + rel->r_offset - 2,
3528                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3529                       roff = rel->r_offset + 6;
3530                     }
3531                   bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3532                               contents + roff);
3533                   /* Skip R_386_PC32/R_386_PLT32.  */
3534                   rel++;
3535                   continue;
3536                 }
3537               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3538                 {
3539                   /* GDesc -> LE transition.
3540                      It's originally something like:
3541                      leal x@tlsdesc(%ebx), %eax
3542
3543                      leal x@ntpoff, %eax
3544
3545                      Registers other than %eax may be set up here.  */
3546
3547                   unsigned int val;
3548                   bfd_vma roff;
3549
3550                   roff = rel->r_offset;
3551                   val = bfd_get_8 (input_bfd, contents + roff - 1);
3552
3553                   /* Now modify the instruction as appropriate.  */
3554                   /* aoliva FIXME: remove the above and xor the byte
3555                      below with 0x86.  */
3556                   bfd_put_8 (output_bfd, val ^ 0x86,
3557                              contents + roff - 1);
3558                   bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3559                               contents + roff);
3560                   continue;
3561                 }
3562               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3563                 {
3564                   /* GDesc -> LE transition.
3565                      It's originally:
3566                      call *(%eax)
3567                      Turn it into:
3568                      xchg %ax,%ax  */
3569
3570                   bfd_vma roff;
3571
3572                   roff = rel->r_offset;
3573                   bfd_put_8 (output_bfd, 0x66, contents + roff);
3574                   bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3575                   continue;
3576                 }
3577               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3578                 {
3579                   unsigned int val;
3580
3581                   /* IE->LE transition:
3582                      Originally it can be one of:
3583                      movl foo, %eax
3584                      movl foo, %reg
3585                      addl foo, %reg
3586                      We change it into:
3587                      movl $foo, %eax
3588                      movl $foo, %reg
3589                      addl $foo, %reg.  */
3590                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3591                   if (val == 0xa1)
3592                     {
3593                       /* movl foo, %eax.  */
3594                       bfd_put_8 (output_bfd, 0xb8,
3595                                  contents + rel->r_offset - 1);
3596                     }
3597                   else
3598                     {
3599                       unsigned int type;
3600
3601                       type = bfd_get_8 (input_bfd,
3602                                         contents + rel->r_offset - 2);
3603                       switch (type)
3604                         {
3605                         case 0x8b:
3606                           /* movl */
3607                           bfd_put_8 (output_bfd, 0xc7,
3608                                      contents + rel->r_offset - 2);
3609                           bfd_put_8 (output_bfd,
3610                                      0xc0 | ((val >> 3) & 7),
3611                                      contents + rel->r_offset - 1);
3612                           break;
3613                         case 0x03:
3614                           /* addl */
3615                           bfd_put_8 (output_bfd, 0x81,
3616                                      contents + rel->r_offset - 2);
3617                           bfd_put_8 (output_bfd,
3618                                      0xc0 | ((val >> 3) & 7),
3619                                      contents + rel->r_offset - 1);
3620                           break;
3621                         default:
3622                           BFD_FAIL ();
3623                           break;
3624                         }
3625                     }
3626                   bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3627                               contents + rel->r_offset);
3628                   continue;
3629                 }
3630               else
3631                 {
3632                   unsigned int val, type;
3633
3634                   /* {IE_32,GOTIE}->LE transition:
3635                      Originally it can be one of:
3636                      subl foo(%reg1), %reg2
3637                      movl foo(%reg1), %reg2
3638                      addl foo(%reg1), %reg2
3639                      We change it into:
3640                      subl $foo, %reg2
3641                      movl $foo, %reg2 (6 byte form)
3642                      addl $foo, %reg2.  */
3643                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3644                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3645                   if (type == 0x8b)
3646                     {
3647                       /* movl */
3648                       bfd_put_8 (output_bfd, 0xc7,
3649                                  contents + rel->r_offset - 2);
3650                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3651                                  contents + rel->r_offset - 1);
3652                     }
3653                   else if (type == 0x2b)
3654                     {
3655                       /* subl */
3656                       bfd_put_8 (output_bfd, 0x81,
3657                                  contents + rel->r_offset - 2);
3658                       bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3659                                  contents + rel->r_offset - 1);
3660                     }
3661                   else if (type == 0x03)
3662                     {
3663                       /* addl */
3664                       bfd_put_8 (output_bfd, 0x81,
3665                                  contents + rel->r_offset - 2);
3666                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3667                                  contents + rel->r_offset - 1);
3668                     }
3669                   else
3670                     BFD_FAIL ();
3671                   if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3672                     bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3673                                 contents + rel->r_offset);
3674                   else
3675                     bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3676                                 contents + rel->r_offset);
3677                   continue;
3678                 }
3679             }
3680
3681           if (htab->elf.sgot == NULL)
3682             abort ();
3683
3684           if (h != NULL)
3685             {
3686               off = h->got.offset;
3687               offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3688             }
3689           else
3690             {
3691               if (local_got_offsets == NULL)
3692                 abort ();
3693
3694               off = local_got_offsets[r_symndx];
3695               offplt = local_tlsdesc_gotents[r_symndx];
3696             }
3697
3698           if ((off & 1) != 0)
3699             off &= ~1;
3700           else
3701             {
3702               Elf_Internal_Rela outrel;
3703               bfd_byte *loc;
3704               int dr_type;
3705               asection *sreloc;
3706
3707               if (htab->elf.srelgot == NULL)
3708                 abort ();
3709
3710               indx = h && h->dynindx != -1 ? h->dynindx : 0;
3711
3712               if (GOT_TLS_GDESC_P (tls_type))
3713                 {
3714                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3715                   BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3716                               <= htab->elf.sgotplt->size);
3717                   outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3718                                      + htab->elf.sgotplt->output_offset
3719                                      + offplt
3720                                      + htab->sgotplt_jump_table_size);
3721                   sreloc = htab->elf.srelplt;
3722                   loc = sreloc->contents;
3723                   loc += (htab->next_tls_desc_index++
3724                           * sizeof (Elf32_External_Rel));
3725                   BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3726                               <= sreloc->contents + sreloc->size);
3727                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3728                   if (indx == 0)
3729                     {
3730                       BFD_ASSERT (! unresolved_reloc);
3731                       bfd_put_32 (output_bfd,
3732                                   relocation - elf_i386_dtpoff_base (info),
3733                                   htab->elf.sgotplt->contents + offplt
3734                                   + htab->sgotplt_jump_table_size + 4);
3735                     }
3736                   else
3737                     {
3738                       bfd_put_32 (output_bfd, 0,
3739                                   htab->elf.sgotplt->contents + offplt
3740                                   + htab->sgotplt_jump_table_size + 4);
3741                     }
3742                 }
3743
3744               sreloc = htab->elf.srelgot;
3745
3746               outrel.r_offset = (htab->elf.sgot->output_section->vma
3747                                  + htab->elf.sgot->output_offset + off);
3748
3749               if (GOT_TLS_GD_P (tls_type))
3750                 dr_type = R_386_TLS_DTPMOD32;
3751               else if (GOT_TLS_GDESC_P (tls_type))
3752                 goto dr_done;
3753               else if (tls_type == GOT_TLS_IE_POS)
3754                 dr_type = R_386_TLS_TPOFF;
3755               else
3756                 dr_type = R_386_TLS_TPOFF32;
3757
3758               if (dr_type == R_386_TLS_TPOFF && indx == 0)
3759                 bfd_put_32 (output_bfd,
3760                             relocation - elf_i386_dtpoff_base (info),
3761                             htab->elf.sgot->contents + off);
3762               else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3763                 bfd_put_32 (output_bfd,
3764                             elf_i386_dtpoff_base (info) - relocation,
3765                             htab->elf.sgot->contents + off);
3766               else if (dr_type != R_386_TLS_DESC)
3767                 bfd_put_32 (output_bfd, 0,
3768                             htab->elf.sgot->contents + off);
3769               outrel.r_info = ELF32_R_INFO (indx, dr_type);
3770
3771               loc = sreloc->contents;
3772               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3773               BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3774                           <= sreloc->contents + sreloc->size);
3775               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3776
3777               if (GOT_TLS_GD_P (tls_type))
3778                 {
3779                   if (indx == 0)
3780                     {
3781                       BFD_ASSERT (! unresolved_reloc);
3782                       bfd_put_32 (output_bfd,
3783                                   relocation - elf_i386_dtpoff_base (info),
3784                                   htab->elf.sgot->contents + off + 4);
3785                     }
3786                   else
3787                     {
3788                       bfd_put_32 (output_bfd, 0,
3789                                   htab->elf.sgot->contents + off + 4);
3790                       outrel.r_info = ELF32_R_INFO (indx,
3791                                                     R_386_TLS_DTPOFF32);
3792                       outrel.r_offset += 4;
3793                       sreloc->reloc_count++;
3794                       loc += sizeof (Elf32_External_Rel);
3795                       BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3796                                   <= sreloc->contents + sreloc->size);
3797                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3798                     }
3799                 }
3800               else if (tls_type == GOT_TLS_IE_BOTH)
3801                 {
3802                   bfd_put_32 (output_bfd,
3803                               (indx == 0
3804                                ? relocation - elf_i386_dtpoff_base (info)
3805                                : 0),
3806                               htab->elf.sgot->contents + off + 4);
3807                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3808                   outrel.r_offset += 4;
3809                   sreloc->reloc_count++;
3810                   loc += sizeof (Elf32_External_Rel);
3811                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3812                 }
3813
3814             dr_done:
3815               if (h != NULL)
3816                 h->got.offset |= 1;
3817               else
3818                 local_got_offsets[r_symndx] |= 1;
3819             }
3820
3821           if (off >= (bfd_vma) -2
3822               && ! GOT_TLS_GDESC_P (tls_type))
3823             abort ();
3824           if (r_type == R_386_TLS_GOTDESC
3825               || r_type == R_386_TLS_DESC_CALL)
3826             {
3827               relocation = htab->sgotplt_jump_table_size + offplt;
3828               unresolved_reloc = FALSE;
3829             }
3830           else if (r_type == ELF32_R_TYPE (rel->r_info))
3831             {
3832               bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3833                               + htab->elf.sgotplt->output_offset;
3834               relocation = htab->elf.sgot->output_section->vma
3835                 + htab->elf.sgot->output_offset + off - g_o_t;
3836               if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3837                   && tls_type == GOT_TLS_IE_BOTH)
3838                 relocation += 4;
3839               if (r_type == R_386_TLS_IE)
3840                 relocation += g_o_t;
3841               unresolved_reloc = FALSE;
3842             }
3843           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3844             {
3845               unsigned int val, type;
3846               bfd_vma roff;
3847
3848               /* GD->IE transition.  */
3849               type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3850               val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3851               if (type == 0x04)
3852                 {
3853                   /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3854                      Change it into:
3855                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
3856                   val >>= 3;
3857                   roff = rel->r_offset - 3;
3858                 }
3859               else
3860                 {
3861                   /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3862                      Change it into:
3863                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
3864                   roff = rel->r_offset - 2;
3865                 }
3866               memcpy (contents + roff,
3867                       "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3868               contents[roff + 7] = 0x80 | (val & 7);
3869               /* If foo is used only with foo@gotntpoff(%reg) and
3870                  foo@indntpoff, but not with foo@gottpoff(%reg), change
3871                  subl $foo@gottpoff(%reg), %eax
3872                  into:
3873                  addl $foo@gotntpoff(%reg), %eax.  */
3874               if (tls_type == GOT_TLS_IE_POS)
3875                 contents[roff + 6] = 0x03;
3876               bfd_put_32 (output_bfd,
3877                           htab->elf.sgot->output_section->vma
3878                           + htab->elf.sgot->output_offset + off
3879                           - htab->elf.sgotplt->output_section->vma
3880                           - htab->elf.sgotplt->output_offset,
3881                           contents + roff + 8);
3882               /* Skip R_386_PLT32.  */
3883               rel++;
3884               continue;
3885             }
3886           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3887             {
3888               /* GDesc -> IE transition.
3889                  It's originally something like:
3890                  leal x@tlsdesc(%ebx), %eax
3891
3892                  Change it to:
3893                  movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3894                  or:
3895                  movl x@gottpoff(%ebx), %eax # before negl %eax
3896
3897                  Registers other than %eax may be set up here.  */
3898
3899               bfd_vma roff;
3900
3901               /* First, make sure it's a leal adding ebx to a 32-bit
3902                  offset into any register, although it's probably
3903                  almost always going to be eax.  */
3904               roff = rel->r_offset;
3905
3906               /* Now modify the instruction as appropriate.  */
3907               /* To turn a leal into a movl in the form we use it, it
3908                  suffices to change the first byte from 0x8d to 0x8b.
3909                  aoliva FIXME: should we decide to keep the leal, all
3910                  we have to do is remove the statement below, and
3911                  adjust the relaxation of R_386_TLS_DESC_CALL.  */
3912               bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3913
3914               if (tls_type == GOT_TLS_IE_BOTH)
3915                 off += 4;
3916
3917               bfd_put_32 (output_bfd,
3918                           htab->elf.sgot->output_section->vma
3919                           + htab->elf.sgot->output_offset + off
3920                           - htab->elf.sgotplt->output_section->vma
3921                           - htab->elf.sgotplt->output_offset,
3922                           contents + roff);
3923               continue;
3924             }
3925           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3926             {
3927               /* GDesc -> IE transition.
3928                  It's originally:
3929                  call *(%eax)
3930
3931                  Change it to:
3932                  xchg %ax,%ax
3933                  or
3934                  negl %eax
3935                  depending on how we transformed the TLS_GOTDESC above.
3936               */
3937
3938               bfd_vma roff;
3939
3940               roff = rel->r_offset;
3941
3942               /* Now modify the instruction as appropriate.  */
3943               if (tls_type != GOT_TLS_IE_NEG)
3944                 {
3945                   /* xchg %ax,%ax */
3946                   bfd_put_8 (output_bfd, 0x66, contents + roff);
3947                   bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3948                 }
3949               else
3950                 {
3951                   /* negl %eax */
3952                   bfd_put_8 (output_bfd, 0xf7, contents + roff);
3953                   bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3954                 }
3955
3956               continue;
3957             }
3958           else
3959             BFD_ASSERT (FALSE);
3960           break;
3961
3962         case R_386_TLS_LDM:
3963           if (! elf_i386_tls_transition (info, input_bfd,
3964                                          input_section, contents,
3965                                          symtab_hdr, sym_hashes,
3966                                          &r_type, GOT_UNKNOWN, rel,
3967                                          relend, h, r_symndx))
3968             return FALSE;
3969
3970           if (r_type != R_386_TLS_LDM)
3971             {
3972               /* LD->LE transition:
3973                  leal foo(%reg), %eax; call ___tls_get_addr.
3974                  We change it into:
3975                  movl %gs:0, %eax; nop; leal 0(%esi,1), %esi.  */
3976               BFD_ASSERT (r_type == R_386_TLS_LE_32);
3977               memcpy (contents + rel->r_offset - 2,
3978                       "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3979               /* Skip R_386_PC32/R_386_PLT32.  */
3980               rel++;
3981               continue;
3982             }
3983
3984           if (htab->elf.sgot == NULL)
3985             abort ();
3986
3987           off = htab->tls_ldm_got.offset;
3988           if (off & 1)
3989             off &= ~1;
3990           else
3991             {
3992               Elf_Internal_Rela outrel;
3993               bfd_byte *loc;
3994
3995               if (htab->elf.srelgot == NULL)
3996                 abort ();
3997
3998               outrel.r_offset = (htab->elf.sgot->output_section->vma
3999                                  + htab->elf.sgot->output_offset + off);
4000
4001               bfd_put_32 (output_bfd, 0,
4002                           htab->elf.sgot->contents + off);
4003               bfd_put_32 (output_bfd, 0,
4004                           htab->elf.sgot->contents + off + 4);
4005               outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4006               loc = htab->elf.srelgot->contents;
4007               loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4008               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4009               htab->tls_ldm_got.offset |= 1;
4010             }
4011           relocation = htab->elf.sgot->output_section->vma
4012                        + htab->elf.sgot->output_offset + off
4013                        - htab->elf.sgotplt->output_section->vma
4014                        - htab->elf.sgotplt->output_offset;
4015           unresolved_reloc = FALSE;
4016           break;
4017
4018         case R_386_TLS_LDO_32:
4019           if (info->shared || (input_section->flags & SEC_CODE) == 0)
4020             relocation -= elf_i386_dtpoff_base (info);
4021           else
4022             /* When converting LDO to LE, we must negate.  */
4023             relocation = -elf_i386_tpoff (info, relocation);
4024           break;
4025
4026         case R_386_TLS_LE_32:
4027         case R_386_TLS_LE:
4028           if (!info->executable)
4029             {
4030               Elf_Internal_Rela outrel;
4031               asection *sreloc;
4032               bfd_byte *loc;
4033
4034               outrel.r_offset = rel->r_offset
4035                                 + input_section->output_section->vma
4036                                 + input_section->output_offset;
4037               if (h != NULL && h->dynindx != -1)
4038                 indx = h->dynindx;
4039               else
4040                 indx = 0;
4041               if (r_type == R_386_TLS_LE_32)
4042                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4043               else
4044                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4045               sreloc = elf_section_data (input_section)->sreloc;
4046               if (sreloc == NULL)
4047                 abort ();
4048               loc = sreloc->contents;
4049               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
4050               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4051               if (indx)
4052                 continue;
4053               else if (r_type == R_386_TLS_LE_32)
4054                 relocation = elf_i386_dtpoff_base (info) - relocation;
4055               else
4056                 relocation -= elf_i386_dtpoff_base (info);
4057             }
4058           else if (r_type == R_386_TLS_LE_32)
4059             relocation = elf_i386_tpoff (info, relocation);
4060           else
4061             relocation = -elf_i386_tpoff (info, relocation);
4062           break;
4063
4064         default:
4065           break;
4066         }
4067
4068       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4069          because such sections are not SEC_ALLOC and thus ld.so will
4070          not process them.  */
4071       if (unresolved_reloc
4072           && !((input_section->flags & SEC_DEBUGGING) != 0
4073                && h->def_dynamic))
4074         {
4075           (*_bfd_error_handler)
4076             (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4077              input_bfd,
4078              input_section,
4079              (long) rel->r_offset,
4080              howto->name,
4081              h->root.root.string);
4082           return FALSE;
4083         }
4084
4085 do_relocation:
4086       r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4087                                     contents, rel->r_offset,
4088                                     relocation, 0);
4089
4090       if (r != bfd_reloc_ok)
4091         {
4092           const char *name;
4093
4094           if (h != NULL)
4095             name = h->root.root.string;
4096           else
4097             {
4098               name = bfd_elf_string_from_elf_section (input_bfd,
4099                                                       symtab_hdr->sh_link,
4100                                                       sym->st_name);
4101               if (name == NULL)
4102                 return FALSE;
4103               if (*name == '\0')
4104                 name = bfd_section_name (input_bfd, sec);
4105             }
4106
4107           if (r == bfd_reloc_overflow)
4108             {
4109               if (! ((*info->callbacks->reloc_overflow)
4110                      (info, (h ? &h->root : NULL), name, howto->name,
4111                       (bfd_vma) 0, input_bfd, input_section,
4112                       rel->r_offset)))
4113                 return FALSE;
4114             }
4115           else
4116             {
4117               (*_bfd_error_handler)
4118                 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4119                  input_bfd, input_section,
4120                  (long) rel->r_offset, name, (int) r);
4121               return FALSE;
4122             }
4123         }
4124     }
4125
4126   return TRUE;
4127 }
4128
4129 /* Finish up dynamic symbol handling.  We set the contents of various
4130    dynamic sections here.  */
4131
4132 static bfd_boolean
4133 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4134                                 struct bfd_link_info *info,
4135                                 struct elf_link_hash_entry *h,
4136                                 Elf_Internal_Sym *sym)
4137 {
4138   struct elf_i386_link_hash_table *htab;
4139
4140   htab = elf_i386_hash_table (info);
4141   if (htab == NULL)
4142     return FALSE;
4143
4144   if (h->plt.offset != (bfd_vma) -1)
4145     {
4146       bfd_vma plt_index;
4147       bfd_vma got_offset;
4148       Elf_Internal_Rela rel;
4149       bfd_byte *loc;
4150       asection *plt, *gotplt, *relplt;
4151
4152       /* When building a static executable, use .iplt, .igot.plt and
4153          .rel.iplt sections for STT_GNU_IFUNC symbols.  */
4154       if (htab->elf.splt != NULL)
4155         {
4156           plt = htab->elf.splt;
4157           gotplt = htab->elf.sgotplt;
4158           relplt = htab->elf.srelplt;
4159         }
4160       else
4161         {
4162           plt = htab->elf.iplt;
4163           gotplt = htab->elf.igotplt;
4164           relplt = htab->elf.irelplt;
4165         }
4166
4167       /* This symbol has an entry in the procedure linkage table.  Set
4168          it up.  */
4169
4170       if ((h->dynindx == -1
4171            && !((h->forced_local || info->executable)
4172                 && h->def_regular
4173                 && h->type == STT_GNU_IFUNC))
4174           || plt == NULL
4175           || gotplt == NULL
4176           || relplt == NULL)
4177         abort ();
4178
4179       /* Get the index in the procedure linkage table which
4180          corresponds to this symbol.  This is the index of this symbol
4181          in all the symbols for which we are making plt entries.  The
4182          first entry in the procedure linkage table is reserved.
4183
4184          Get the offset into the .got table of the entry that
4185          corresponds to this function.  Each .got entry is 4 bytes.
4186          The first three are reserved.
4187
4188          For static executables, we don't reserve anything.  */
4189
4190       if (plt == htab->elf.splt)
4191         {
4192           plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
4193           got_offset = (plt_index + 3) * 4;
4194         }
4195       else
4196         {
4197           plt_index = h->plt.offset / PLT_ENTRY_SIZE;
4198           got_offset = plt_index * 4;
4199         }
4200
4201       /* Fill in the entry in the procedure linkage table.  */
4202       if (! info->shared)
4203         {
4204           memcpy (plt->contents + h->plt.offset, elf_i386_plt_entry,
4205                   PLT_ENTRY_SIZE);
4206           bfd_put_32 (output_bfd,
4207                       (gotplt->output_section->vma
4208                        + gotplt->output_offset
4209                        + got_offset),
4210                       plt->contents + h->plt.offset + 2);
4211
4212           if (htab->is_vxworks)
4213             {
4214               int s, k, reloc_index;
4215
4216               /* Create the R_386_32 relocation referencing the GOT
4217                  for this PLT entry.  */
4218
4219               /* S: Current slot number (zero-based).  */
4220               s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
4221               /* K: Number of relocations for PLTResolve. */
4222               if (info->shared)
4223                 k = PLTRESOLVE_RELOCS_SHLIB;
4224               else
4225                 k = PLTRESOLVE_RELOCS;
4226               /* Skip the PLTresolve relocations, and the relocations for
4227                  the other PLT slots. */
4228               reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4229               loc = (htab->srelplt2->contents + reloc_index
4230                      * sizeof (Elf32_External_Rel));
4231
4232               rel.r_offset = (htab->elf.splt->output_section->vma
4233                               + htab->elf.splt->output_offset
4234                               + h->plt.offset + 2),
4235               rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4236               bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4237
4238               /* Create the R_386_32 relocation referencing the beginning of
4239                  the PLT for this GOT entry.  */
4240               rel.r_offset = (htab->elf.sgotplt->output_section->vma
4241                               + htab->elf.sgotplt->output_offset
4242                               + got_offset);
4243               rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4244               bfd_elf32_swap_reloc_out (output_bfd, &rel,
4245               loc + sizeof (Elf32_External_Rel));
4246             }
4247         }
4248       else
4249         {
4250           memcpy (plt->contents + h->plt.offset, elf_i386_pic_plt_entry,
4251                   PLT_ENTRY_SIZE);
4252           bfd_put_32 (output_bfd, got_offset,
4253                       plt->contents + h->plt.offset + 2);
4254         }
4255
4256       /* Don't fill PLT entry for static executables.  */
4257       if (plt == htab->elf.splt)
4258         {
4259           bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4260                       plt->contents + h->plt.offset + 7);
4261           bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
4262                       plt->contents + h->plt.offset + 12);
4263         }
4264
4265       /* Fill in the entry in the global offset table.  */
4266       bfd_put_32 (output_bfd,
4267                   (plt->output_section->vma
4268                    + plt->output_offset
4269                    + h->plt.offset
4270                    + 6),
4271                   gotplt->contents + got_offset);
4272
4273       /* Fill in the entry in the .rel.plt section.  */
4274       rel.r_offset = (gotplt->output_section->vma
4275                       + gotplt->output_offset
4276                       + got_offset);
4277       if (h->dynindx == -1
4278           || ((info->executable
4279                || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4280               && h->def_regular
4281                && h->type == STT_GNU_IFUNC))
4282         {
4283           /* If an STT_GNU_IFUNC symbol is locally defined, generate
4284              R_386_IRELATIVE instead of R_386_JUMP_SLOT.  Store addend
4285              in the .got.plt section.  */
4286           bfd_put_32 (output_bfd,
4287                       (h->root.u.def.value
4288                        + h->root.u.def.section->output_section->vma
4289                        + h->root.u.def.section->output_offset),
4290                       gotplt->contents + got_offset);
4291           rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4292         }
4293       else
4294         rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4295       loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4296       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4297
4298       if (!h->def_regular)
4299         {
4300           /* Mark the symbol as undefined, rather than as defined in
4301              the .plt section.  Leave the value if there were any
4302              relocations where pointer equality matters (this is a clue
4303              for the dynamic linker, to make function pointer
4304              comparisons work between an application and shared
4305              library), otherwise set it to zero.  If a function is only
4306              called from a binary, there is no need to slow down
4307              shared libraries because of that.  */
4308           sym->st_shndx = SHN_UNDEF;
4309           if (!h->pointer_equality_needed)
4310             sym->st_value = 0;
4311         }
4312     }
4313
4314   if (h->got.offset != (bfd_vma) -1
4315       && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4316       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4317     {
4318       Elf_Internal_Rela rel;
4319       bfd_byte *loc;
4320
4321       /* This symbol has an entry in the global offset table.  Set it
4322          up.  */
4323
4324       if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4325         abort ();
4326
4327       rel.r_offset = (htab->elf.sgot->output_section->vma
4328                       + htab->elf.sgot->output_offset
4329                       + (h->got.offset & ~(bfd_vma) 1));
4330
4331       /* If this is a static link, or it is a -Bsymbolic link and the
4332          symbol is defined locally or was forced to be local because
4333          of a version file, we just want to emit a RELATIVE reloc.
4334          The entry in the global offset table will already have been
4335          initialized in the relocate_section function.  */
4336       if (h->def_regular
4337           && h->type == STT_GNU_IFUNC)
4338         {
4339           if (info->shared)
4340             {
4341               /* Generate R_386_GLOB_DAT.  */
4342               goto do_glob_dat;
4343             }
4344           else
4345             {
4346               asection *plt;
4347
4348               if (!h->pointer_equality_needed)
4349                 abort ();
4350
4351               /* For non-shared object, we can't use .got.plt, which
4352                  contains the real function addres if we need pointer
4353                  equality.  We load the GOT entry with the PLT entry.  */
4354               plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4355               bfd_put_32 (output_bfd,
4356                           (plt->output_section->vma
4357                            + plt->output_offset + h->plt.offset),
4358                           htab->elf.sgot->contents + h->got.offset);
4359               return TRUE;
4360             }
4361         }
4362       else if (info->shared
4363                && SYMBOL_REFERENCES_LOCAL (info, h))
4364         {
4365           BFD_ASSERT((h->got.offset & 1) != 0);
4366           rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4367         }
4368       else
4369         {
4370           BFD_ASSERT((h->got.offset & 1) == 0);
4371 do_glob_dat:
4372           bfd_put_32 (output_bfd, (bfd_vma) 0,
4373                       htab->elf.sgot->contents + h->got.offset);
4374           rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4375         }
4376
4377       loc = htab->elf.srelgot->contents;
4378       loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4379       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4380     }
4381
4382   if (h->needs_copy)
4383     {
4384       Elf_Internal_Rela rel;
4385       bfd_byte *loc;
4386
4387       /* This symbol needs a copy reloc.  Set it up.  */
4388
4389       if (h->dynindx == -1
4390           || (h->root.type != bfd_link_hash_defined
4391               && h->root.type != bfd_link_hash_defweak)
4392           || htab->srelbss == NULL)
4393         abort ();
4394
4395       rel.r_offset = (h->root.u.def.value
4396                       + h->root.u.def.section->output_section->vma
4397                       + h->root.u.def.section->output_offset);
4398       rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4399       loc = htab->srelbss->contents;
4400       loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
4401       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4402     }
4403
4404   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  SYM may
4405      be NULL for local symbols.
4406
4407      On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4408      is relative to the ".got" section.  */
4409   if (sym != NULL
4410       && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4411           || (!htab->is_vxworks && h == htab->elf.hgot)))
4412     sym->st_shndx = SHN_ABS;
4413
4414   return TRUE;
4415 }
4416
4417 /* Finish up local dynamic symbol handling.  We set the contents of
4418    various dynamic sections here.  */
4419
4420 static bfd_boolean
4421 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4422 {
4423   struct elf_link_hash_entry *h
4424     = (struct elf_link_hash_entry *) *slot;
4425   struct bfd_link_info *info
4426     = (struct bfd_link_info *) inf;
4427
4428   return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4429                                          h, NULL);
4430 }
4431
4432 /* Used to decide how to sort relocs in an optimal manner for the
4433    dynamic linker, before writing them out.  */
4434
4435 static enum elf_reloc_type_class
4436 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
4437 {
4438   switch (ELF32_R_TYPE (rela->r_info))
4439     {
4440     case R_386_RELATIVE:
4441       return reloc_class_relative;
4442     case R_386_JUMP_SLOT:
4443       return reloc_class_plt;
4444     case R_386_COPY:
4445       return reloc_class_copy;
4446     default:
4447       return reloc_class_normal;
4448     }
4449 }
4450
4451 /* Finish up the dynamic sections.  */
4452
4453 static bfd_boolean
4454 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4455                                   struct bfd_link_info *info)
4456 {
4457   struct elf_i386_link_hash_table *htab;
4458   bfd *dynobj;
4459   asection *sdyn;
4460
4461   htab = elf_i386_hash_table (info);
4462   if (htab == NULL)
4463     return FALSE;
4464
4465   dynobj = htab->elf.dynobj;
4466   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4467
4468   if (htab->elf.dynamic_sections_created)
4469     {
4470       Elf32_External_Dyn *dyncon, *dynconend;
4471
4472       if (sdyn == NULL || htab->elf.sgot == NULL)
4473         abort ();
4474
4475       dyncon = (Elf32_External_Dyn *) sdyn->contents;
4476       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4477       for (; dyncon < dynconend; dyncon++)
4478         {
4479           Elf_Internal_Dyn dyn;
4480           asection *s;
4481
4482           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4483
4484           switch (dyn.d_tag)
4485             {
4486             default:
4487               if (htab->is_vxworks
4488                   && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4489                 break;
4490               continue;
4491
4492             case DT_PLTGOT:
4493               s = htab->elf.sgotplt;
4494               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4495               break;
4496
4497             case DT_JMPREL:
4498               s = htab->elf.srelplt;
4499               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4500               break;
4501
4502             case DT_PLTRELSZ:
4503               s = htab->elf.srelplt;
4504               dyn.d_un.d_val = s->size;
4505               break;
4506
4507             case DT_RELSZ:
4508               /* My reading of the SVR4 ABI indicates that the
4509                  procedure linkage table relocs (DT_JMPREL) should be
4510                  included in the overall relocs (DT_REL).  This is
4511                  what Solaris does.  However, UnixWare can not handle
4512                  that case.  Therefore, we override the DT_RELSZ entry
4513                  here to make it not include the JMPREL relocs.  */
4514               s = htab->elf.srelplt;
4515               if (s == NULL)
4516                 continue;
4517               dyn.d_un.d_val -= s->size;
4518               break;
4519
4520             case DT_REL:
4521               /* We may not be using the standard ELF linker script.
4522                  If .rel.plt is the first .rel section, we adjust
4523                  DT_REL to not include it.  */
4524               s = htab->elf.srelplt;
4525               if (s == NULL)
4526                 continue;
4527               if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4528                 continue;
4529               dyn.d_un.d_ptr += s->size;
4530               break;
4531             }
4532
4533           bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4534         }
4535
4536       /* Fill in the first entry in the procedure linkage table.  */
4537       if (htab->elf.splt && htab->elf.splt->size > 0)
4538         {
4539           if (info->shared)
4540             {
4541               memcpy (htab->elf.splt->contents, elf_i386_pic_plt0_entry,
4542                       sizeof (elf_i386_pic_plt0_entry));
4543               memset (htab->elf.splt->contents + sizeof (elf_i386_pic_plt0_entry),
4544                       htab->plt0_pad_byte,
4545                       PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
4546             }
4547           else
4548             {
4549               memcpy (htab->elf.splt->contents, elf_i386_plt0_entry,
4550                       sizeof(elf_i386_plt0_entry));
4551               memset (htab->elf.splt->contents + sizeof (elf_i386_plt0_entry),
4552                       htab->plt0_pad_byte,
4553                       PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
4554               bfd_put_32 (output_bfd,
4555                           (htab->elf.sgotplt->output_section->vma
4556                            + htab->elf.sgotplt->output_offset
4557                            + 4),
4558                           htab->elf.splt->contents + 2);
4559               bfd_put_32 (output_bfd,
4560                           (htab->elf.sgotplt->output_section->vma
4561                            + htab->elf.sgotplt->output_offset
4562                            + 8),
4563                           htab->elf.splt->contents + 8);
4564
4565               if (htab->is_vxworks)
4566                 {
4567                   Elf_Internal_Rela rel;
4568
4569                   /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4570                      On IA32 we use REL relocations so the addend goes in
4571                      the PLT directly.  */
4572                   rel.r_offset = (htab->elf.splt->output_section->vma
4573                                   + htab->elf.splt->output_offset
4574                                   + 2);
4575                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4576                   bfd_elf32_swap_reloc_out (output_bfd, &rel,
4577                                             htab->srelplt2->contents);
4578                   /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8.  */
4579                   rel.r_offset = (htab->elf.splt->output_section->vma
4580                                   + htab->elf.splt->output_offset
4581                                   + 8);
4582                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4583                   bfd_elf32_swap_reloc_out (output_bfd, &rel,
4584                                             htab->srelplt2->contents +
4585                                             sizeof (Elf32_External_Rel));
4586                 }
4587             }
4588
4589           /* UnixWare sets the entsize of .plt to 4, although that doesn't
4590              really seem like the right value.  */
4591           elf_section_data (htab->elf.splt->output_section)
4592             ->this_hdr.sh_entsize = 4;
4593
4594           /* Correct the .rel.plt.unloaded relocations.  */
4595           if (htab->is_vxworks && !info->shared)
4596             {
4597               int num_plts = (htab->elf.splt->size / PLT_ENTRY_SIZE) - 1;
4598               unsigned char *p;
4599
4600               p = htab->srelplt2->contents;
4601               if (info->shared)
4602                 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4603               else
4604                 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4605
4606               for (; num_plts; num_plts--)
4607                 {
4608                   Elf_Internal_Rela rel;
4609                   bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4610                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4611                   bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4612                   p += sizeof (Elf32_External_Rel);
4613
4614                   bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4615                   rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4616                   bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4617                   p += sizeof (Elf32_External_Rel);
4618                 }
4619             }
4620         }
4621     }
4622
4623   if (htab->elf.sgotplt)
4624     {
4625       if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4626         {
4627           (*_bfd_error_handler)
4628             (_("discarded output section: `%A'"), htab->elf.sgotplt);
4629           return FALSE;
4630         }
4631
4632       /* Fill in the first three entries in the global offset table.  */
4633       if (htab->elf.sgotplt->size > 0)
4634         {
4635           bfd_put_32 (output_bfd,
4636                       (sdyn == NULL ? 0
4637                        : sdyn->output_section->vma + sdyn->output_offset),
4638                       htab->elf.sgotplt->contents);
4639           bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4640           bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4641         }
4642
4643       elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4644     }
4645
4646   if (htab->elf.sgot && htab->elf.sgot->size > 0)
4647     elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4648
4649   /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols.  */
4650   htab_traverse (htab->loc_hash_table,
4651                  elf_i386_finish_local_dynamic_symbol,
4652                  info);
4653
4654   return TRUE;
4655 }
4656
4657 /* Return address for Ith PLT stub in section PLT, for relocation REL
4658    or (bfd_vma) -1 if it should not be included.  */
4659
4660 static bfd_vma
4661 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4662                       const arelent *rel ATTRIBUTE_UNUSED)
4663 {
4664   return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4665 }
4666
4667 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section.  */
4668
4669 static bfd_boolean
4670 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
4671 {
4672   if (h->plt.offset != (bfd_vma) -1
4673       && !h->def_regular
4674       && !h->pointer_equality_needed)
4675     return FALSE;
4676
4677   return _bfd_elf_hash_symbol (h);
4678 }
4679
4680 /* Hook called by the linker routine which adds symbols from an object
4681    file.  */
4682
4683 static bfd_boolean
4684 elf_i386_add_symbol_hook (bfd * abfd,
4685                           struct bfd_link_info * info ATTRIBUTE_UNUSED,
4686                           Elf_Internal_Sym * sym,
4687                           const char ** namep ATTRIBUTE_UNUSED,
4688                           flagword * flagsp ATTRIBUTE_UNUSED,
4689                           asection ** secp ATTRIBUTE_UNUSED,
4690                           bfd_vma * valp ATTRIBUTE_UNUSED)
4691 {
4692   if ((abfd->flags & DYNAMIC) == 0
4693       && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4694     elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4695
4696   return TRUE;
4697 }
4698
4699 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vec
4700 #define TARGET_LITTLE_NAME              "elf32-i386"
4701 #define ELF_ARCH                        bfd_arch_i386
4702 #define ELF_TARGET_ID                   I386_ELF_DATA
4703 #define ELF_MACHINE_CODE                EM_386
4704 #define ELF_MAXPAGESIZE                 0x1000
4705
4706 #define elf_backend_can_gc_sections     1
4707 #define elf_backend_can_refcount        1
4708 #define elf_backend_want_got_plt        1
4709 #define elf_backend_plt_readonly        1
4710 #define elf_backend_want_plt_sym        0
4711 #define elf_backend_got_header_size     12
4712
4713 /* Support RELA for objdump of prelink objects.  */
4714 #define elf_info_to_howto                     elf_i386_info_to_howto_rel
4715 #define elf_info_to_howto_rel                 elf_i386_info_to_howto_rel
4716
4717 #define bfd_elf32_mkobject                    elf_i386_mkobject
4718
4719 #define bfd_elf32_bfd_is_local_label_name     elf_i386_is_local_label_name
4720 #define bfd_elf32_bfd_link_hash_table_create  elf_i386_link_hash_table_create
4721 #define bfd_elf32_bfd_link_hash_table_free    elf_i386_link_hash_table_free
4722 #define bfd_elf32_bfd_reloc_type_lookup       elf_i386_reloc_type_lookup
4723 #define bfd_elf32_bfd_reloc_name_lookup       elf_i386_reloc_name_lookup
4724
4725 #define elf_backend_adjust_dynamic_symbol     elf_i386_adjust_dynamic_symbol
4726 #define elf_backend_relocs_compatible         _bfd_elf_relocs_compatible
4727 #define elf_backend_check_relocs              elf_i386_check_relocs
4728 #define elf_backend_copy_indirect_symbol      elf_i386_copy_indirect_symbol
4729 #define elf_backend_create_dynamic_sections   elf_i386_create_dynamic_sections
4730 #define elf_backend_fake_sections             elf_i386_fake_sections
4731 #define elf_backend_finish_dynamic_sections   elf_i386_finish_dynamic_sections
4732 #define elf_backend_finish_dynamic_symbol     elf_i386_finish_dynamic_symbol
4733 #define elf_backend_gc_mark_hook              elf_i386_gc_mark_hook
4734 #define elf_backend_gc_sweep_hook             elf_i386_gc_sweep_hook
4735 #define elf_backend_grok_prstatus             elf_i386_grok_prstatus
4736 #define elf_backend_grok_psinfo               elf_i386_grok_psinfo
4737 #define elf_backend_reloc_type_class          elf_i386_reloc_type_class
4738 #define elf_backend_relocate_section          elf_i386_relocate_section
4739 #define elf_backend_size_dynamic_sections     elf_i386_size_dynamic_sections
4740 #define elf_backend_always_size_sections      elf_i386_always_size_sections
4741 #define elf_backend_omit_section_dynsym \
4742   ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4743 #define elf_backend_plt_sym_val               elf_i386_plt_sym_val
4744 #define elf_backend_hash_symbol               elf_i386_hash_symbol
4745 #define elf_backend_add_symbol_hook           elf_i386_add_symbol_hook
4746 #undef  elf_backend_post_process_headers
4747 #define elf_backend_post_process_headers        _bfd_elf_set_osabi
4748
4749 #include "elf32-target.h"
4750
4751 /* FreeBSD support.  */
4752
4753 #undef  TARGET_LITTLE_SYM
4754 #define TARGET_LITTLE_SYM               bfd_elf32_i386_freebsd_vec
4755 #undef  TARGET_LITTLE_NAME
4756 #define TARGET_LITTLE_NAME              "elf32-i386-freebsd"
4757 #undef  ELF_OSABI
4758 #define ELF_OSABI                       ELFOSABI_FREEBSD
4759
4760 /* The kernel recognizes executables as valid only if they carry a
4761    "FreeBSD" label in the ELF header.  So we put this label on all
4762    executables and (for simplicity) also all other object files.  */
4763
4764 static void
4765 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4766 {
4767   _bfd_elf_set_osabi (abfd, info);
4768
4769 #ifdef OLD_FREEBSD_ABI_LABEL
4770   /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
4771   memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4772 #endif
4773 }
4774
4775 #undef  elf_backend_post_process_headers
4776 #define elf_backend_post_process_headers        elf_i386_fbsd_post_process_headers
4777 #undef  elf32_bed
4778 #define elf32_bed                               elf32_i386_fbsd_bed
4779
4780 #undef elf_backend_add_symbol_hook
4781
4782 #include "elf32-target.h"
4783
4784 /* Solaris 2.  */
4785
4786 #undef  TARGET_LITTLE_SYM
4787 #define TARGET_LITTLE_SYM               bfd_elf32_i386_sol2_vec
4788 #undef  TARGET_LITTLE_NAME
4789 #define TARGET_LITTLE_NAME              "elf32-i386-sol2"
4790
4791 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4792    objects won't be recognized.  */
4793 #undef ELF_OSABI
4794
4795 #undef  elf32_bed
4796 #define elf32_bed                       elf32_i386_sol2_bed
4797
4798 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4799
4800    Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4801    File, p.63.  */
4802 #undef elf_backend_want_plt_sym
4803 #define elf_backend_want_plt_sym        1
4804
4805 #include "elf32-target.h"
4806
4807 /* VxWorks support.  */
4808
4809 #undef  TARGET_LITTLE_SYM
4810 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vxworks_vec
4811 #undef  TARGET_LITTLE_NAME
4812 #define TARGET_LITTLE_NAME              "elf32-i386-vxworks"
4813 #undef  ELF_OSABI
4814
4815 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks.  */
4816
4817 static struct bfd_link_hash_table *
4818 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4819 {
4820   struct bfd_link_hash_table *ret;
4821   struct elf_i386_link_hash_table *htab;
4822
4823   ret = elf_i386_link_hash_table_create (abfd);
4824   if (ret)
4825     {
4826       htab = (struct elf_i386_link_hash_table *) ret;
4827       htab->is_vxworks = 1;
4828       htab->plt0_pad_byte = 0x90;
4829     }
4830
4831   return ret;
4832 }
4833
4834
4835 #undef elf_backend_relocs_compatible
4836 #undef elf_backend_post_process_headers
4837 #undef bfd_elf32_bfd_link_hash_table_create
4838 #define bfd_elf32_bfd_link_hash_table_create \
4839   elf_i386_vxworks_link_hash_table_create
4840 #undef elf_backend_add_symbol_hook
4841 #define elf_backend_add_symbol_hook \
4842   elf_vxworks_add_symbol_hook
4843 #undef elf_backend_link_output_symbol_hook
4844 #define elf_backend_link_output_symbol_hook \
4845   elf_vxworks_link_output_symbol_hook
4846 #undef elf_backend_emit_relocs
4847 #define elf_backend_emit_relocs                 elf_vxworks_emit_relocs
4848 #undef elf_backend_final_write_processing
4849 #define elf_backend_final_write_processing \
4850   elf_vxworks_final_write_processing
4851
4852 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4853    define it.  */
4854 #undef elf_backend_want_plt_sym
4855 #define elf_backend_want_plt_sym        1
4856
4857 #undef  elf32_bed
4858 #define elf32_bed                               elf32_i386_vxworks_bed
4859
4860 #include "elf32-target.h"