bfd/elf64-s390.c

   1 /* IBM S/390-specific support for 64-bit ELF
   2    Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
   3    Free Software Foundation, Inc.
   4    Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "bfdlink.h"
  26 #include "libbfd.h"
  27 #include "elf-bfd.h"
  28
  29 static reloc_howto_type *elf_s390_reloc_type_lookup
  30   PARAMS ((bfd *, bfd_reloc_code_real_type));
  31 static void elf_s390_info_to_howto
  32   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
  33 static bfd_boolean elf_s390_is_local_label_name
  34   PARAMS ((bfd *, const char *));
  35 static struct bfd_hash_entry *link_hash_newfunc
  36   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
  37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
  38   PARAMS ((bfd *));
  39 static bfd_boolean create_got_section
  40   PARAMS((bfd *, struct bfd_link_info *));
  41 static bfd_boolean elf_s390_create_dynamic_sections
  42   PARAMS((bfd *, struct bfd_link_info *));
  43 static void elf_s390_copy_indirect_symbol
  44   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
  45            struct elf_link_hash_entry *));
  46 static bfd_boolean elf_s390_check_relocs
  47   PARAMS ((bfd *, struct bfd_link_info *, asection *,
  48            const Elf_Internal_Rela *));
  49 struct elf_s390_link_hash_entry;
  50 static void elf_s390_adjust_gotplt
  51   PARAMS ((struct elf_s390_link_hash_entry *));
  52 static bfd_boolean elf_s390_adjust_dynamic_symbol
  53   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
  54 static bfd_boolean allocate_dynrelocs
  55   PARAMS ((struct elf_link_hash_entry *, PTR));
  56 static bfd_boolean readonly_dynrelocs
  57   PARAMS ((struct elf_link_hash_entry *, PTR));
  58 static bfd_boolean elf_s390_size_dynamic_sections
  59   PARAMS ((bfd *, struct bfd_link_info *));
  60 static bfd_boolean elf_s390_relocate_section
  61   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
  62            Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
  63 static bfd_boolean elf_s390_finish_dynamic_symbol
  64   PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
  65            Elf_Internal_Sym *));
  66 static enum elf_reloc_type_class elf_s390_reloc_type_class
  67   PARAMS ((const Elf_Internal_Rela *));
  68 static bfd_boolean elf_s390_finish_dynamic_sections
  69   PARAMS ((bfd *, struct bfd_link_info *));
  70 static bfd_boolean elf_s390_object_p
  71   PARAMS ((bfd *));
  72 static int elf_s390_tls_transition
  73   PARAMS ((struct bfd_link_info *, int, int));
  74 static bfd_reloc_status_type s390_tls_reloc
  75   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  76 static bfd_vma dtpoff_base
  77   PARAMS ((struct bfd_link_info *));
  78 static bfd_vma tpoff
  79   PARAMS ((struct bfd_link_info *, bfd_vma));
  80 static void invalid_tls_insn
  81   PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
  82 static bfd_reloc_status_type s390_elf_ldisp_reloc
  83   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  84
  85 #include "elf/s390.h"
  86
  87 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
  88    from smaller values.  Start with zero, widen, *then* decrement.  */
  89 #define MINUS_ONE      (((bfd_vma)0) - 1)
  90
  91 /* The relocation "howto" table.  */
  92 static reloc_howto_type elf_howto_table[] =
  93 {
  94   HOWTO (R_390_NONE,            /* type */
  95          0,                     /* rightshift */
  96          0,                     /* size (0 = byte, 1 = short, 2 = long) */
  97          0,                     /* bitsize */
  98          FALSE,                 /* pc_relative */
  99          0,                     /* bitpos */
 100          complain_overflow_dont, /* complain_on_overflow */
 101          bfd_elf_generic_reloc, /* special_function */
 102          "R_390_NONE",          /* name */
 103          FALSE,                 /* partial_inplace */
 104          0,                     /* src_mask */
 105          0,                     /* dst_mask */
 106          FALSE),                /* pcrel_offset */
 107
 108   HOWTO(R_390_8,         0, 0,  8, FALSE, 0, complain_overflow_bitfield,
 109         bfd_elf_generic_reloc, "R_390_8",        FALSE, 0,0x000000ff, FALSE),
 110   HOWTO(R_390_12,        0, 1, 12, FALSE, 0, complain_overflow_dont,
 111         bfd_elf_generic_reloc, "R_390_12",       FALSE, 0,0x00000fff, FALSE),
 112   HOWTO(R_390_16,        0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 113         bfd_elf_generic_reloc, "R_390_16",       FALSE, 0,0x0000ffff, FALSE),
 114   HOWTO(R_390_32,        0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 115         bfd_elf_generic_reloc, "R_390_32",       FALSE, 0,0xffffffff, FALSE),
 116   HOWTO(R_390_PC32,      0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 117         bfd_elf_generic_reloc, "R_390_PC32",     FALSE, 0,0xffffffff, TRUE),
 118   HOWTO(R_390_GOT12,     0, 1, 12, FALSE, 0, complain_overflow_bitfield,
 119         bfd_elf_generic_reloc, "R_390_GOT12",    FALSE, 0,0x00000fff, FALSE),
 120   HOWTO(R_390_GOT32,     0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 121         bfd_elf_generic_reloc, "R_390_GOT32",    FALSE, 0,0xffffffff, FALSE),
 122   HOWTO(R_390_PLT32,     0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 123         bfd_elf_generic_reloc, "R_390_PLT32",    FALSE, 0,0xffffffff, TRUE),
 124   HOWTO(R_390_COPY,      0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 125         bfd_elf_generic_reloc, "R_390_COPY",     FALSE, 0,MINUS_ONE,  FALSE),
 126   HOWTO(R_390_GLOB_DAT,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 127         bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE,  FALSE),
 128   HOWTO(R_390_JMP_SLOT,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 129         bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE,  FALSE),
 130   HOWTO(R_390_RELATIVE,  0, 4, 64,  TRUE, 0, complain_overflow_bitfield,
 131         bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE,  FALSE),
 132   HOWTO(R_390_GOTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 133         bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE,  FALSE),
 134   HOWTO(R_390_GOTPC,     0, 4, 64,  TRUE, 0, complain_overflow_bitfield,
 135         bfd_elf_generic_reloc, "R_390_GOTPC",    FALSE, 0,MINUS_ONE,  TRUE),
 136   HOWTO(R_390_GOT16,     0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 137         bfd_elf_generic_reloc, "R_390_GOT16",    FALSE, 0,0x0000ffff, FALSE),
 138   HOWTO(R_390_PC16,      0, 1, 16,  TRUE, 0, complain_overflow_bitfield,
 139         bfd_elf_generic_reloc, "R_390_PC16",     FALSE, 0,0x0000ffff, TRUE),
 140   HOWTO(R_390_PC16DBL,   1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
 141         bfd_elf_generic_reloc, "R_390_PC16DBL",  FALSE, 0,0x0000ffff, TRUE),
 142   HOWTO(R_390_PLT16DBL,  1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
 143         bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
 144   HOWTO(R_390_PC32DBL,   1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 145         bfd_elf_generic_reloc, "R_390_PC32DBL",  FALSE, 0,0xffffffff, TRUE),
 146   HOWTO(R_390_PLT32DBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 147         bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
 148   HOWTO(R_390_GOTPCDBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 149         bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE,  TRUE),
 150   HOWTO(R_390_64,        0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 151         bfd_elf_generic_reloc, "R_390_64",       FALSE, 0,MINUS_ONE,  FALSE),
 152   HOWTO(R_390_PC64,      0, 4, 64,  TRUE, 0, complain_overflow_bitfield,
 153         bfd_elf_generic_reloc, "R_390_PC64",     FALSE, 0,MINUS_ONE,  TRUE),
 154   HOWTO(R_390_GOT64,     0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 155         bfd_elf_generic_reloc, "R_390_GOT64",    FALSE, 0,MINUS_ONE,  FALSE),
 156   HOWTO(R_390_PLT64,     0, 4, 64,  TRUE, 0, complain_overflow_bitfield,
 157         bfd_elf_generic_reloc, "R_390_PLT64",    FALSE, 0,MINUS_ONE,  TRUE),
 158   HOWTO(R_390_GOTENT,    1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 159         bfd_elf_generic_reloc, "R_390_GOTENT",   FALSE, 0,MINUS_ONE,  TRUE),
 160   HOWTO(R_390_GOTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 161         bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
 162   HOWTO(R_390_GOTOFF64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 163         bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE,  FALSE),
 164   HOWTO(R_390_GOTPLT12,  0, 1, 12, FALSE, 0, complain_overflow_dont,
 165         bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
 166   HOWTO(R_390_GOTPLT16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 167         bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
 168   HOWTO(R_390_GOTPLT32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 169         bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
 170   HOWTO(R_390_GOTPLT64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 171         bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE,  FALSE),
 172   HOWTO(R_390_GOTPLTENT, 1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 173         bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE,  TRUE),
 174   HOWTO(R_390_PLTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 175         bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
 176   HOWTO(R_390_PLTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 177         bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
 178   HOWTO(R_390_PLTOFF64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 179         bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE,  FALSE),
 180   HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 181         s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
 182   HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 183         s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
 184   HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 185         s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
 186   EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32.  */
 187   HOWTO(R_390_TLS_GD64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 188         bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
 189   HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
 190         bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
 191   EMPTY_HOWTO (R_390_TLS_GOTIE32),      /* Empty entry for R_390_TLS_GOTIE32.  */
 192   HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 193         bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
 194   EMPTY_HOWTO (R_390_TLS_LDM32),        /* Empty entry for R_390_TLS_LDM32.  */
 195   HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 196         bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
 197   EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32.  */
 198   HOWTO(R_390_TLS_IE64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 199         bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
 200   HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
 201         bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
 202   EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32.  */
 203   HOWTO(R_390_TLS_LE64,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 204         bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
 205   EMPTY_HOWTO (R_390_TLS_LDO32),        /* Empty entry for R_390_TLS_LDO32.  */
 206   HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 207         bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
 208   HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 209         bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
 210   HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 211         bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
 212   HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 213         bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
 214   HOWTO(R_390_20,        0, 2, 20, FALSE, 8, complain_overflow_dont,
 215         s390_elf_ldisp_reloc, "R_390_20",      FALSE, 0,0x0fffff00, FALSE),
 216   HOWTO(R_390_GOT20,     0, 2, 20, FALSE, 8, complain_overflow_dont,
 217         s390_elf_ldisp_reloc, "R_390_GOT20",   FALSE, 0,0x0fffff00, FALSE),
 218   HOWTO(R_390_GOTPLT20,  0, 2, 20, FALSE, 8, complain_overflow_dont,
 219         s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
 220   HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
 221         s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
 222 };
 223
 224 /* GNU extension to record C++ vtable hierarchy.  */
 225 static reloc_howto_type elf64_s390_vtinherit_howto =
 226   HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
 227 static reloc_howto_type elf64_s390_vtentry_howto =
 228   HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
 229
 230 static reloc_howto_type *
 231 elf_s390_reloc_type_lookup (abfd, code)
 232      bfd *abfd ATTRIBUTE_UNUSED;
 233      bfd_reloc_code_real_type code;
 234 {
 235   switch (code)
 236     {
 237     case BFD_RELOC_NONE:
 238       return &elf_howto_table[(int) R_390_NONE];
 239     case BFD_RELOC_8:
 240       return &elf_howto_table[(int) R_390_8];
 241     case BFD_RELOC_390_12:
 242       return &elf_howto_table[(int) R_390_12];
 243     case BFD_RELOC_16:
 244       return &elf_howto_table[(int) R_390_16];
 245     case BFD_RELOC_32:
 246       return &elf_howto_table[(int) R_390_32];
 247     case BFD_RELOC_CTOR:
 248       return &elf_howto_table[(int) R_390_32];
 249     case BFD_RELOC_32_PCREL:
 250       return &elf_howto_table[(int) R_390_PC32];
 251     case BFD_RELOC_390_GOT12:
 252       return &elf_howto_table[(int) R_390_GOT12];
 253     case BFD_RELOC_32_GOT_PCREL:
 254       return &elf_howto_table[(int) R_390_GOT32];
 255     case BFD_RELOC_390_PLT32:
 256       return &elf_howto_table[(int) R_390_PLT32];
 257     case BFD_RELOC_390_COPY:
 258       return &elf_howto_table[(int) R_390_COPY];
 259     case BFD_RELOC_390_GLOB_DAT:
 260       return &elf_howto_table[(int) R_390_GLOB_DAT];
 261     case BFD_RELOC_390_JMP_SLOT:
 262       return &elf_howto_table[(int) R_390_JMP_SLOT];
 263     case BFD_RELOC_390_RELATIVE:
 264       return &elf_howto_table[(int) R_390_RELATIVE];
 265     case BFD_RELOC_32_GOTOFF:
 266       return &elf_howto_table[(int) R_390_GOTOFF32];
 267     case BFD_RELOC_390_GOTPC:
 268       return &elf_howto_table[(int) R_390_GOTPC];
 269     case BFD_RELOC_390_GOT16:
 270       return &elf_howto_table[(int) R_390_GOT16];
 271     case BFD_RELOC_16_PCREL:
 272       return &elf_howto_table[(int) R_390_PC16];
 273     case BFD_RELOC_390_PC16DBL:
 274       return &elf_howto_table[(int) R_390_PC16DBL];
 275     case BFD_RELOC_390_PLT16DBL:
 276       return &elf_howto_table[(int) R_390_PLT16DBL];
 277     case BFD_RELOC_390_PC32DBL:
 278       return &elf_howto_table[(int) R_390_PC32DBL];
 279     case BFD_RELOC_390_PLT32DBL:
 280       return &elf_howto_table[(int) R_390_PLT32DBL];
 281     case BFD_RELOC_390_GOTPCDBL:
 282       return &elf_howto_table[(int) R_390_GOTPCDBL];
 283     case BFD_RELOC_64:
 284       return &elf_howto_table[(int) R_390_64];
 285     case BFD_RELOC_64_PCREL:
 286       return &elf_howto_table[(int) R_390_PC64];
 287     case BFD_RELOC_390_GOT64:
 288       return &elf_howto_table[(int) R_390_GOT64];
 289     case BFD_RELOC_390_PLT64:
 290       return &elf_howto_table[(int) R_390_PLT64];
 291     case BFD_RELOC_390_GOTENT:
 292       return &elf_howto_table[(int) R_390_GOTENT];
 293     case BFD_RELOC_16_GOTOFF:
 294       return &elf_howto_table[(int) R_390_GOTOFF16];
 295     case BFD_RELOC_390_GOTOFF64:
 296       return &elf_howto_table[(int) R_390_GOTOFF64];
 297     case BFD_RELOC_390_GOTPLT12:
 298       return &elf_howto_table[(int) R_390_GOTPLT12];
 299     case BFD_RELOC_390_GOTPLT16:
 300       return &elf_howto_table[(int) R_390_GOTPLT16];
 301     case BFD_RELOC_390_GOTPLT32:
 302       return &elf_howto_table[(int) R_390_GOTPLT32];
 303     case BFD_RELOC_390_GOTPLT64:
 304       return &elf_howto_table[(int) R_390_GOTPLT64];
 305     case BFD_RELOC_390_GOTPLTENT:
 306       return &elf_howto_table[(int) R_390_GOTPLTENT];
 307     case BFD_RELOC_390_PLTOFF16:
 308       return &elf_howto_table[(int) R_390_PLTOFF16];
 309     case BFD_RELOC_390_PLTOFF32:
 310       return &elf_howto_table[(int) R_390_PLTOFF32];
 311     case BFD_RELOC_390_PLTOFF64:
 312       return &elf_howto_table[(int) R_390_PLTOFF64];
 313     case BFD_RELOC_390_TLS_LOAD:
 314       return &elf_howto_table[(int) R_390_TLS_LOAD];
 315     case BFD_RELOC_390_TLS_GDCALL:
 316       return &elf_howto_table[(int) R_390_TLS_GDCALL];
 317     case BFD_RELOC_390_TLS_LDCALL:
 318       return &elf_howto_table[(int) R_390_TLS_LDCALL];
 319     case BFD_RELOC_390_TLS_GD64:
 320       return &elf_howto_table[(int) R_390_TLS_GD64];
 321     case BFD_RELOC_390_TLS_GOTIE12:
 322       return &elf_howto_table[(int) R_390_TLS_GOTIE12];
 323     case BFD_RELOC_390_TLS_GOTIE64:
 324       return &elf_howto_table[(int) R_390_TLS_GOTIE64];
 325     case BFD_RELOC_390_TLS_LDM64:
 326       return &elf_howto_table[(int) R_390_TLS_LDM64];
 327     case BFD_RELOC_390_TLS_IE64:
 328       return &elf_howto_table[(int) R_390_TLS_IE64];
 329     case BFD_RELOC_390_TLS_IEENT:
 330       return &elf_howto_table[(int) R_390_TLS_IEENT];
 331     case BFD_RELOC_390_TLS_LE64:
 332       return &elf_howto_table[(int) R_390_TLS_LE64];
 333     case BFD_RELOC_390_TLS_LDO64:
 334       return &elf_howto_table[(int) R_390_TLS_LDO64];
 335     case BFD_RELOC_390_TLS_DTPMOD:
 336       return &elf_howto_table[(int) R_390_TLS_DTPMOD];
 337     case BFD_RELOC_390_TLS_DTPOFF:
 338       return &elf_howto_table[(int) R_390_TLS_DTPOFF];
 339     case BFD_RELOC_390_TLS_TPOFF:
 340       return &elf_howto_table[(int) R_390_TLS_TPOFF];
 341     case BFD_RELOC_390_20:
 342       return &elf_howto_table[(int) R_390_20];
 343     case BFD_RELOC_390_GOT20:
 344       return &elf_howto_table[(int) R_390_GOT20];
 345     case BFD_RELOC_390_GOTPLT20:
 346       return &elf_howto_table[(int) R_390_GOTPLT20];
 347     case BFD_RELOC_390_TLS_GOTIE20:
 348       return &elf_howto_table[(int) R_390_TLS_GOTIE20];
 349     case BFD_RELOC_VTABLE_INHERIT:
 350       return &elf64_s390_vtinherit_howto;
 351     case BFD_RELOC_VTABLE_ENTRY:
 352       return &elf64_s390_vtentry_howto;
 353     default:
 354       break;
 355     }
 356   return 0;
 357 }
 358
 359 static reloc_howto_type *
 360 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 361                             const char *r_name)
 362 {
 363   unsigned int i;
 364
 365   for (i = 0;
 366        i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
 367        i++)
 368     if (elf_howto_table[i].name != NULL
 369         && strcasecmp (elf_howto_table[i].name, r_name) == 0)
 370       return &elf_howto_table[i];
 371
 372     if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
 373       return &elf64_s390_vtinherit_howto;
 374     if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
 375       return &elf64_s390_vtentry_howto;
 376
 377   return NULL;
 378 }
 379
 380 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
 381    and elf64-s390.c has its own copy.  */
 382
 383 static void
 384 elf_s390_info_to_howto (abfd, cache_ptr, dst)
 385      bfd *abfd ATTRIBUTE_UNUSED;
 386      arelent *cache_ptr;
 387      Elf_Internal_Rela *dst;
 388 {
 389   unsigned int r_type = ELF64_R_TYPE(dst->r_info);
 390   switch (r_type)
 391     {
 392     case R_390_GNU_VTINHERIT:
 393       cache_ptr->howto = &elf64_s390_vtinherit_howto;
 394       break;
 395
 396     case R_390_GNU_VTENTRY:
 397       cache_ptr->howto = &elf64_s390_vtentry_howto;
 398       break;
 399
 400     default:
 401       if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
 402         {
 403           (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
 404                                  abfd, (int) r_type);
 405           r_type = R_390_NONE;
 406         }
 407       cache_ptr->howto = &elf_howto_table[r_type];
 408     }
 409 }
 410
 411 /* A relocation function which doesn't do anything.  */
 412 static bfd_reloc_status_type
 413 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
 414                 output_bfd, error_message)
 415      bfd *abfd ATTRIBUTE_UNUSED;
 416      arelent *reloc_entry;
 417      asymbol *symbol ATTRIBUTE_UNUSED;
 418      PTR data ATTRIBUTE_UNUSED;
 419      asection *input_section;
 420      bfd *output_bfd;
 421      char **error_message ATTRIBUTE_UNUSED;
 422 {
 423   if (output_bfd)
 424     reloc_entry->address += input_section->output_offset;
 425   return bfd_reloc_ok;
 426 }
 427
 428 /* Handle the large displacement relocs.  */
 429 static bfd_reloc_status_type
 430 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
 431                       output_bfd, error_message)
 432      bfd *abfd;
 433      arelent *reloc_entry;
 434      asymbol *symbol;
 435      PTR data;
 436      asection *input_section;
 437      bfd *output_bfd;
 438      char **error_message ATTRIBUTE_UNUSED;
 439 {
 440   reloc_howto_type *howto = reloc_entry->howto;
 441   bfd_vma relocation;
 442   bfd_vma insn;
 443
 444   if (output_bfd != (bfd *) NULL
 445       && (symbol->flags & BSF_SECTION_SYM) == 0
 446       && (! howto->partial_inplace
 447           || reloc_entry->addend == 0))
 448     {
 449       reloc_entry->address += input_section->output_offset;
 450       return bfd_reloc_ok;
 451     }
 452   if (output_bfd != NULL)
 453     return bfd_reloc_continue;
 454
 455   if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
 456     return bfd_reloc_outofrange;
 457
 458   relocation = (symbol->value
 459                 + symbol->section->output_section->vma
 460                 + symbol->section->output_offset);
 461   relocation += reloc_entry->addend;
 462   if (howto->pc_relative)
 463     {
 464       relocation -= (input_section->output_section->vma
 465                      + input_section->output_offset);
 466       relocation -= reloc_entry->address;
 467     }
 468
 469   insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
 470   insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
 471   bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
 472
 473   if ((bfd_signed_vma) relocation < - 0x80000
 474       || (bfd_signed_vma) relocation > 0x7ffff)
 475     return bfd_reloc_overflow;
 476   else
 477     return bfd_reloc_ok;
 478 }
 479
 480 static bfd_boolean
 481 elf_s390_is_local_label_name (abfd, name)
 482      bfd *abfd;
 483      const char *name;
 484 {
 485   if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
 486     return TRUE;
 487
 488   return _bfd_elf_is_local_label_name (abfd, name);
 489 }
 490
 491 /* Functions for the 390 ELF linker.  */
 492
 493 /* The name of the dynamic interpreter.  This is put in the .interp
 494    section.  */
 495
 496 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
 497
 498 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
 499    copying dynamic variables from a shared lib into an app's dynbss
 500    section, and instead use a dynamic relocation to point into the
 501    shared lib.  */
 502 #define ELIMINATE_COPY_RELOCS 1
 503
 504 /* The size in bytes of the first entry in the procedure linkage table.  */
 505 #define PLT_FIRST_ENTRY_SIZE 32
 506 /* The size in bytes of an entry in the procedure linkage table.  */
 507 #define PLT_ENTRY_SIZE 32
 508
 509 #define GOT_ENTRY_SIZE 8
 510
 511 /* The first three entries in a procedure linkage table are reserved,
 512    and the initial contents are unimportant (we zero them out).
 513    Subsequent entries look like this.  See the SVR4 ABI 386
 514    supplement to see how this works.  */
 515
 516 /* For the s390, simple addr offset can only be 0 - 4096.
 517    To use the full 16777216 TB address space, several instructions
 518    are needed to load an address in a register and execute
 519    a branch( or just saving the address)
 520
 521    Furthermore, only r 0 and 1 are free to use!!!  */
 522
 523 /* The first 3 words in the GOT are then reserved.
 524    Word 0 is the address of the dynamic table.
 525    Word 1 is a pointer to a structure describing the object
 526    Word 2 is used to point to the loader entry address.
 527
 528    The code for PLT entries looks like this:
 529
 530    The GOT holds the address in the PLT to be executed.
 531    The loader then gets:
 532    24(15) =  Pointer to the structure describing the object.
 533    28(15) =  Offset in symbol table
 534    The loader  must  then find the module where the function is
 535    and insert the address in the GOT.
 536
 537    PLT1: LARL 1,<fn>@GOTENT # 6 bytes  Load address of GOT entry in r1
 538          LG   1,0(1)      # 6 bytes  Load address from GOT in r1
 539          BCR  15,1        # 2 bytes  Jump to address
 540    RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
 541          LGF  1,12(1)     # 6 bytes  Load offset in symbl table in r1
 542          BRCL 15,-x       # 6 bytes  Jump to start of PLT
 543          .long ?          # 4 bytes  offset into symbol table
 544
 545    Total = 32 bytes per PLT entry
 546    Fixup at offset 2: relative address to GOT entry
 547    Fixup at offset 22: relative branch to PLT0
 548    Fixup at offset 28: 32 bit offset into symbol table
 549
 550    A 32 bit offset into the symbol table is enough. It allows for symbol
 551    tables up to a size of 2 gigabyte. A single dynamic object (the main
 552    program, any shared library) is limited to 4GB in size and I want to see
 553    the program that manages to have a symbol table of more than 2 GB with a
 554    total size of at max 4 GB.  */
 555
 556 #define PLT_ENTRY_WORD0     (bfd_vma) 0xc0100000
 557 #define PLT_ENTRY_WORD1     (bfd_vma) 0x0000e310
 558 #define PLT_ENTRY_WORD2     (bfd_vma) 0x10000004
 559 #define PLT_ENTRY_WORD3     (bfd_vma) 0x07f10d10
 560 #define PLT_ENTRY_WORD4     (bfd_vma) 0xe310100c
 561 #define PLT_ENTRY_WORD5     (bfd_vma) 0x0014c0f4
 562 #define PLT_ENTRY_WORD6     (bfd_vma) 0x00000000
 563 #define PLT_ENTRY_WORD7     (bfd_vma) 0x00000000
 564
 565 /* The first PLT entry pushes the offset into the symbol table
 566    from R1 onto the stack at 8(15) and the loader object info
 567    at 12(15), loads the loader address in R1 and jumps to it.  */
 568
 569 /* The first entry in the PLT:
 570
 571   PLT0:
 572      STG  1,56(15)  # r1 contains the offset into the symbol table
 573      LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
 574      MVC  48(8,15),8(1) # move loader ino (object struct address) to stack
 575      LG   1,16(1)   # get entry address of loader
 576      BCR  15,1      # jump to loader
 577
 578      Fixup at offset 8: relative address to start of GOT.  */
 579
 580 #define PLT_FIRST_ENTRY_WORD0     (bfd_vma) 0xe310f038
 581 #define PLT_FIRST_ENTRY_WORD1     (bfd_vma) 0x0024c010
 582 #define PLT_FIRST_ENTRY_WORD2     (bfd_vma) 0x00000000
 583 #define PLT_FIRST_ENTRY_WORD3     (bfd_vma) 0xd207f030
 584 #define PLT_FIRST_ENTRY_WORD4     (bfd_vma) 0x1008e310
 585 #define PLT_FIRST_ENTRY_WORD5     (bfd_vma) 0x10100004
 586 #define PLT_FIRST_ENTRY_WORD6     (bfd_vma) 0x07f10700
 587 #define PLT_FIRST_ENTRY_WORD7     (bfd_vma) 0x07000700
 588
 589 /* The s390 linker needs to keep track of the number of relocs that it
 590    decides to copy as dynamic relocs in check_relocs for each symbol.
 591    This is so that it can later discard them if they are found to be
 592    unnecessary.  We store the information in a field extending the
 593    regular ELF linker hash table.  */
 594
 595 struct elf_s390_dyn_relocs
 596 {
 597   struct elf_s390_dyn_relocs *next;
 598
 599   /* The input section of the reloc.  */
 600   asection *sec;
 601
 602   /* Total number of relocs copied for the input section.  */
 603   bfd_size_type count;
 604
 605   /* Number of pc-relative relocs copied for the input section.  */
 606   bfd_size_type pc_count;
 607 };
 608
 609 /* s390 ELF linker hash entry.  */
 610
 611 struct elf_s390_link_hash_entry
 612 {
 613   struct elf_link_hash_entry elf;
 614
 615   /* Track dynamic relocs copied for this symbol.  */
 616   struct elf_s390_dyn_relocs *dyn_relocs;
 617
 618   /* Number of GOTPLT references for a function.  */
 619   bfd_signed_vma gotplt_refcount;
 620
 621 #define GOT_UNKNOWN     0
 622 #define GOT_NORMAL      1
 623 #define GOT_TLS_GD      2
 624 #define GOT_TLS_IE      3
 625 #define GOT_TLS_IE_NLT  3
 626   unsigned char tls_type;
 627 };
 628
 629 #define elf_s390_hash_entry(ent) \
 630   ((struct elf_s390_link_hash_entry *)(ent))
 631
 632 /* NOTE: Keep this structure in sync with
 633    the one declared in elf32-s390.c.  */
 634 struct elf_s390_obj_tdata
 635 {
 636   struct elf_obj_tdata root;
 637
 638   /* TLS type for each local got entry.  */
 639   char *local_got_tls_type;
 640 };
 641
 642 #define elf_s390_tdata(abfd) \
 643   ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
 644
 645 #define elf_s390_local_got_tls_type(abfd) \
 646   (elf_s390_tdata (abfd)->local_got_tls_type)
 647
 648 #define is_s390_elf(bfd)                                \
 649   (bfd_get_flavour (bfd) == bfd_target_elf_flavour      \
 650    && elf_tdata (bfd) != NULL                           \
 651    && elf_object_id (bfd) == S390_ELF_TDATA)
 652
 653 static bfd_boolean
 654 elf_s390_mkobject (bfd *abfd)
 655 {
 656   return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
 657                                   S390_ELF_TDATA);
 658 }
 659
 660 static bfd_boolean
 661 elf_s390_object_p (abfd)
 662      bfd *abfd;
 663 {
 664   /* Set the right machine number for an s390 elf32 file.  */
 665   return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
 666 }
 667
 668 /* s390 ELF linker hash table.  */
 669
 670 struct elf_s390_link_hash_table
 671 {
 672   struct elf_link_hash_table elf;
 673
 674   /* Short-cuts to get to dynamic linker sections.  */
 675   asection *sgot;
 676   asection *sgotplt;
 677   asection *srelgot;
 678   asection *splt;
 679   asection *srelplt;
 680   asection *sdynbss;
 681   asection *srelbss;
 682
 683   union {
 684     bfd_signed_vma refcount;
 685     bfd_vma offset;
 686   } tls_ldm_got;
 687
 688   /* Small local sym to section mapping cache.  */
 689   struct sym_sec_cache sym_sec;
 690 };
 691
 692 /* Get the s390 ELF linker hash table from a link_info structure.  */
 693
 694 #define elf_s390_hash_table(p) \
 695   ((struct elf_s390_link_hash_table *) ((p)->hash))
 696
 697 /* Create an entry in an s390 ELF linker hash table.  */
 698
 699 static struct bfd_hash_entry *
 700 link_hash_newfunc (entry, table, string)
 701      struct bfd_hash_entry *entry;
 702      struct bfd_hash_table *table;
 703      const char *string;
 704 {
 705   /* Allocate the structure if it has not already been allocated by a
 706      subclass.  */
 707   if (entry == NULL)
 708     {
 709       entry = bfd_hash_allocate (table,
 710                                  sizeof (struct elf_s390_link_hash_entry));
 711       if (entry == NULL)
 712         return entry;
 713     }
 714
 715   /* Call the allocation method of the superclass.  */
 716   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 717   if (entry != NULL)
 718     {
 719       struct elf_s390_link_hash_entry *eh;
 720
 721       eh = (struct elf_s390_link_hash_entry *) entry;
 722       eh->dyn_relocs = NULL;
 723       eh->gotplt_refcount = 0;
 724       eh->tls_type = GOT_UNKNOWN;
 725     }
 726
 727   return entry;
 728 }
 729
 730 /* Create an s390 ELF linker hash table.  */
 731
 732 static struct bfd_link_hash_table *
 733 elf_s390_link_hash_table_create (abfd)
 734      bfd *abfd;
 735 {
 736   struct elf_s390_link_hash_table *ret;
 737   bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
 738
 739   ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
 740   if (ret == NULL)
 741     return NULL;
 742
 743   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
 744                                       sizeof (struct elf_s390_link_hash_entry)))
 745     {
 746       free (ret);
 747       return NULL;
 748     }
 749
 750   ret->sgot = NULL;
 751   ret->sgotplt = NULL;
 752   ret->srelgot = NULL;
 753   ret->splt = NULL;
 754   ret->srelplt = NULL;
 755   ret->sdynbss = NULL;
 756   ret->srelbss = NULL;
 757   ret->tls_ldm_got.refcount = 0;
 758   ret->sym_sec.abfd = NULL;
 759
 760   return &ret->elf.root;
 761 }
 762
 763 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
 764    shortcuts to them in our hash table.  */
 765
 766 static bfd_boolean
 767 create_got_section (dynobj, info)
 768      bfd *dynobj;
 769      struct bfd_link_info *info;
 770 {
 771   struct elf_s390_link_hash_table *htab;
 772
 773   if (! _bfd_elf_create_got_section (dynobj, info))
 774     return FALSE;
 775
 776   htab = elf_s390_hash_table (info);
 777   htab->sgot = bfd_get_section_by_name (dynobj, ".got");
 778   htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
 779   if (!htab->sgot || !htab->sgotplt)
 780     abort ();
 781
 782   htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
 783                                                (SEC_ALLOC | SEC_LOAD
 784                                                 | SEC_HAS_CONTENTS
 785                                                 | SEC_IN_MEMORY
 786                                                 | SEC_LINKER_CREATED
 787                                                 | SEC_READONLY));
 788   if (htab->srelgot == NULL
 789       || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
 790     return FALSE;
 791   return TRUE;
 792 }
 793
 794 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
 795    .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
 796    hash table.  */
 797
 798 static bfd_boolean
 799 elf_s390_create_dynamic_sections (dynobj, info)
 800      bfd *dynobj;
 801      struct bfd_link_info *info;
 802 {
 803   struct elf_s390_link_hash_table *htab;
 804
 805   htab = elf_s390_hash_table (info);
 806   if (!htab->sgot && !create_got_section (dynobj, info))
 807     return FALSE;
 808
 809   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 810     return FALSE;
 811
 812   htab->splt = bfd_get_section_by_name (dynobj, ".plt");
 813   htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
 814   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 815   if (!info->shared)
 816     htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
 817
 818   if (!htab->splt || !htab->srelplt || !htab->sdynbss
 819       || (!info->shared && !htab->srelbss))
 820     abort ();
 821
 822   return TRUE;
 823 }
 824
 825 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 826
 827 static void
 828 elf_s390_copy_indirect_symbol (info, dir, ind)
 829      struct bfd_link_info *info;
 830      struct elf_link_hash_entry *dir, *ind;
 831 {
 832   struct elf_s390_link_hash_entry *edir, *eind;
 833
 834   edir = (struct elf_s390_link_hash_entry *) dir;
 835   eind = (struct elf_s390_link_hash_entry *) ind;
 836
 837   if (eind->dyn_relocs != NULL)
 838     {
 839       if (edir->dyn_relocs != NULL)
 840         {
 841           struct elf_s390_dyn_relocs **pp;
 842           struct elf_s390_dyn_relocs *p;
 843
 844           /* Add reloc counts against the indirect sym to the direct sym
 845              list.  Merge any entries against the same section.  */
 846           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 847             {
 848               struct elf_s390_dyn_relocs *q;
 849
 850               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 851                 if (q->sec == p->sec)
 852                   {
 853                     q->pc_count += p->pc_count;
 854                     q->count += p->count;
 855                     *pp = p->next;
 856                     break;
 857                   }
 858               if (q == NULL)
 859                 pp = &p->next;
 860             }
 861           *pp = edir->dyn_relocs;
 862         }
 863
 864       edir->dyn_relocs = eind->dyn_relocs;
 865       eind->dyn_relocs = NULL;
 866     }
 867
 868   if (ind->root.type == bfd_link_hash_indirect
 869       && dir->got.refcount <= 0)
 870     {
 871       edir->tls_type = eind->tls_type;
 872       eind->tls_type = GOT_UNKNOWN;
 873     }
 874
 875   if (ELIMINATE_COPY_RELOCS
 876       && ind->root.type != bfd_link_hash_indirect
 877       && dir->dynamic_adjusted)
 878     {
 879       /* If called to transfer flags for a weakdef during processing
 880          of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 881          We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 882       dir->ref_dynamic |= ind->ref_dynamic;
 883       dir->ref_regular |= ind->ref_regular;
 884       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
 885       dir->needs_plt |= ind->needs_plt;
 886     }
 887   else
 888     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 889 }
 890
 891 static int
 892 elf_s390_tls_transition (info, r_type, is_local)
 893      struct bfd_link_info *info;
 894      int r_type;
 895      int is_local;
 896 {
 897   if (info->shared)
 898     return r_type;
 899
 900   switch (r_type)
 901     {
 902     case R_390_TLS_GD64:
 903     case R_390_TLS_IE64:
 904       if (is_local)
 905         return R_390_TLS_LE64;
 906       return R_390_TLS_IE64;
 907     case R_390_TLS_GOTIE64:
 908       if (is_local)
 909         return R_390_TLS_LE64;
 910       return R_390_TLS_GOTIE64;
 911     case R_390_TLS_LDM64:
 912       return R_390_TLS_LE64;
 913     }
 914
 915   return r_type;
 916 }
 917
 918 /* Look through the relocs for a section during the first phase, and
 919    allocate space in the global offset table or procedure linkage
 920    table.  */
 921
 922 static bfd_boolean
 923 elf_s390_check_relocs (abfd, info, sec, relocs)
 924      bfd *abfd;
 925      struct bfd_link_info *info;
 926      asection *sec;
 927      const Elf_Internal_Rela *relocs;
 928 {
 929   struct elf_s390_link_hash_table *htab;
 930   Elf_Internal_Shdr *symtab_hdr;
 931   struct elf_link_hash_entry **sym_hashes;
 932   const Elf_Internal_Rela *rel;
 933   const Elf_Internal_Rela *rel_end;
 934   asection *sreloc;
 935   bfd_signed_vma *local_got_refcounts;
 936   int tls_type, old_tls_type;
 937
 938   if (info->relocatable)
 939     return TRUE;
 940
 941   BFD_ASSERT (is_s390_elf (abfd));
 942
 943   htab = elf_s390_hash_table (info);
 944   symtab_hdr = &elf_symtab_hdr (abfd);
 945   sym_hashes = elf_sym_hashes (abfd);
 946   local_got_refcounts = elf_local_got_refcounts (abfd);
 947
 948   sreloc = NULL;
 949
 950   rel_end = relocs + sec->reloc_count;
 951   for (rel = relocs; rel < rel_end; rel++)
 952     {
 953       unsigned int r_type;
 954       unsigned long r_symndx;
 955       struct elf_link_hash_entry *h;
 956
 957       r_symndx = ELF64_R_SYM (rel->r_info);
 958
 959       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
 960         {
 961           (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
 962                                  abfd,
 963                                  r_symndx);
 964           return FALSE;
 965         }
 966
 967       if (r_symndx < symtab_hdr->sh_info)
 968         h = NULL;
 969       else
 970         {
 971           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
 972           while (h->root.type == bfd_link_hash_indirect
 973                  || h->root.type == bfd_link_hash_warning)
 974             h = (struct elf_link_hash_entry *) h->root.u.i.link;
 975         }
 976
 977       /* Create got section and local_got_refcounts array if they
 978          are needed.  */
 979       r_type = elf_s390_tls_transition (info,
 980                                         ELF64_R_TYPE (rel->r_info),
 981                                         h == NULL);
 982       switch (r_type)
 983         {
 984         case R_390_GOT12:
 985         case R_390_GOT16:
 986         case R_390_GOT20:
 987         case R_390_GOT32:
 988         case R_390_GOT64:
 989         case R_390_GOTENT:
 990         case R_390_GOTPLT12:
 991         case R_390_GOTPLT16:
 992         case R_390_GOTPLT20:
 993         case R_390_GOTPLT32:
 994         case R_390_GOTPLT64:
 995         case R_390_GOTPLTENT:
 996         case R_390_TLS_GD64:
 997         case R_390_TLS_GOTIE12:
 998         case R_390_TLS_GOTIE20:
 999         case R_390_TLS_GOTIE64:
1000         case R_390_TLS_IEENT:
1001         case R_390_TLS_IE64:
1002         case R_390_TLS_LDM64:
1003           if (h == NULL
1004               && local_got_refcounts == NULL)
1005             {
1006               bfd_size_type size;
1007
1008               size = symtab_hdr->sh_info;
1009               size *= (sizeof (bfd_signed_vma) + sizeof(char));
1010               local_got_refcounts = ((bfd_signed_vma *)
1011                                      bfd_zalloc (abfd, size));
1012               if (local_got_refcounts == NULL)
1013                 return FALSE;
1014               elf_local_got_refcounts (abfd) = local_got_refcounts;
1015               elf_s390_local_got_tls_type (abfd)
1016                 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1017             }
1018           /* Fall through.  */
1019         case R_390_GOTOFF16:
1020         case R_390_GOTOFF32:
1021         case R_390_GOTOFF64:
1022         case R_390_GOTPC:
1023         case R_390_GOTPCDBL:
1024           if (htab->sgot == NULL)
1025             {
1026               if (htab->elf.dynobj == NULL)
1027                 htab->elf.dynobj = abfd;
1028               if (!create_got_section (htab->elf.dynobj, info))
1029                 return FALSE;
1030             }
1031         }
1032
1033       switch (r_type)
1034         {
1035         case R_390_GOTOFF16:
1036         case R_390_GOTOFF32:
1037         case R_390_GOTOFF64:
1038         case R_390_GOTPC:
1039         case R_390_GOTPCDBL:
1040           /* Got is created, nothing to be done.  */
1041           break;
1042
1043         case R_390_PLT16DBL:
1044         case R_390_PLT32:
1045         case R_390_PLT32DBL:
1046         case R_390_PLT64:
1047         case R_390_PLTOFF16:
1048         case R_390_PLTOFF32:
1049         case R_390_PLTOFF64:
1050           /* This symbol requires a procedure linkage table entry.  We
1051              actually build the entry in adjust_dynamic_symbol,
1052              because this might be a case of linking PIC code which is
1053              never referenced by a dynamic object, in which case we
1054              don't need to generate a procedure linkage table entry
1055              after all.  */
1056
1057           /* If this is a local symbol, we resolve it directly without
1058              creating a procedure linkage table entry.  */
1059           if (h != NULL)
1060             {
1061               h->needs_plt = 1;
1062               h->plt.refcount += 1;
1063             }
1064           break;
1065
1066         case R_390_GOTPLT12:
1067         case R_390_GOTPLT16:
1068         case R_390_GOTPLT20:
1069         case R_390_GOTPLT32:
1070         case R_390_GOTPLT64:
1071         case R_390_GOTPLTENT:
1072           /* This symbol requires either a procedure linkage table entry
1073              or an entry in the local got. We actually build the entry
1074              in adjust_dynamic_symbol because whether this is really a
1075              global reference can change and with it the fact if we have
1076              to create a plt entry or a local got entry. To be able to
1077              make a once global symbol a local one we have to keep track
1078              of the number of gotplt references that exist for this
1079              symbol.  */
1080           if (h != NULL)
1081             {
1082               ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1083               h->needs_plt = 1;
1084               h->plt.refcount += 1;
1085             }
1086           else
1087             local_got_refcounts[r_symndx] += 1;
1088           break;
1089
1090         case R_390_TLS_LDM64:
1091           htab->tls_ldm_got.refcount += 1;
1092           break;
1093
1094         case R_390_TLS_IE64:
1095         case R_390_TLS_GOTIE12:
1096         case R_390_TLS_GOTIE20:
1097         case R_390_TLS_GOTIE64:
1098         case R_390_TLS_IEENT:
1099           if (info->shared)
1100             info->flags |= DF_STATIC_TLS;
1101           /* Fall through */
1102
1103         case R_390_GOT12:
1104         case R_390_GOT16:
1105         case R_390_GOT20:
1106         case R_390_GOT32:
1107         case R_390_GOT64:
1108         case R_390_GOTENT:
1109         case R_390_TLS_GD64:
1110           /* This symbol requires a global offset table entry.  */
1111           switch (r_type)
1112             {
1113             default:
1114             case R_390_GOT12:
1115             case R_390_GOT16:
1116             case R_390_GOT20:
1117             case R_390_GOT32:
1118             case R_390_GOTENT:
1119               tls_type = GOT_NORMAL;
1120               break;
1121             case R_390_TLS_GD64:
1122               tls_type = GOT_TLS_GD;
1123               break;
1124             case R_390_TLS_IE64:
1125             case R_390_TLS_GOTIE64:
1126               tls_type = GOT_TLS_IE;
1127               break;
1128             case R_390_TLS_GOTIE12:
1129             case R_390_TLS_GOTIE20:
1130             case R_390_TLS_IEENT:
1131               tls_type = GOT_TLS_IE_NLT;
1132               break;
1133             }
1134
1135           if (h != NULL)
1136             {
1137               h->got.refcount += 1;
1138               old_tls_type = elf_s390_hash_entry(h)->tls_type;
1139             }
1140           else
1141             {
1142               local_got_refcounts[r_symndx] += 1;
1143               old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1144             }
1145           /* If a TLS symbol is accessed using IE at least once,
1146              there is no point to use dynamic model for it.  */
1147           if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1148             {
1149               if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1150                 {
1151                   (*_bfd_error_handler)
1152                     (_("%B: `%s' accessed both as normal and thread local symbol"),
1153                      abfd, h->root.root.string);
1154                   return FALSE;
1155                 }
1156               if (old_tls_type > tls_type)
1157                 tls_type = old_tls_type;
1158             }
1159
1160           if (old_tls_type != tls_type)
1161             {
1162               if (h != NULL)
1163                 elf_s390_hash_entry (h)->tls_type = tls_type;
1164               else
1165                 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1166             }
1167
1168           if (r_type != R_390_TLS_IE64)
1169             break;
1170           /* Fall through */
1171
1172         case R_390_TLS_LE64:
1173           if (!info->shared)
1174             break;
1175           info->flags |= DF_STATIC_TLS;
1176           /* Fall through */
1177
1178         case R_390_8:
1179         case R_390_16:
1180         case R_390_32:
1181         case R_390_64:
1182         case R_390_PC16:
1183         case R_390_PC16DBL:
1184         case R_390_PC32:
1185         case R_390_PC32DBL:
1186         case R_390_PC64:
1187           if (h != NULL && !info->shared)
1188             {
1189               /* If this reloc is in a read-only section, we might
1190                  need a copy reloc.  We can't check reliably at this
1191                  stage whether the section is read-only, as input
1192                  sections have not yet been mapped to output sections.
1193                  Tentatively set the flag for now, and correct in
1194                  adjust_dynamic_symbol.  */
1195               h->non_got_ref = 1;
1196
1197               /* We may need a .plt entry if the function this reloc
1198                  refers to is in a shared lib.  */
1199               h->plt.refcount += 1;
1200             }
1201
1202           /* If we are creating a shared library, and this is a reloc
1203              against a global symbol, or a non PC relative reloc
1204              against a local symbol, then we need to copy the reloc
1205              into the shared library.  However, if we are linking with
1206              -Bsymbolic, we do not need to copy a reloc against a
1207              global symbol which is defined in an object we are
1208              including in the link (i.e., DEF_REGULAR is set).  At
1209              this point we have not seen all the input files, so it is
1210              possible that DEF_REGULAR is not set now but will be set
1211              later (it is never cleared).  In case of a weak definition,
1212              DEF_REGULAR may be cleared later by a strong definition in
1213              a shared library. We account for that possibility below by
1214              storing information in the relocs_copied field of the hash
1215              table entry.  A similar situation occurs when creating
1216              shared libraries and symbol visibility changes render the
1217              symbol local.
1218
1219              If on the other hand, we are creating an executable, we
1220              may need to keep relocations for symbols satisfied by a
1221              dynamic library if we manage to avoid copy relocs for the
1222              symbol.  */
1223           if ((info->shared
1224                && (sec->flags & SEC_ALLOC) != 0
1225                && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1226                     && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1227                     && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1228                     && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1229                     && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1230                    || (h != NULL
1231                        && (! info->symbolic
1232                            || h->root.type == bfd_link_hash_defweak
1233                            || !h->def_regular))))
1234               || (ELIMINATE_COPY_RELOCS
1235                   && !info->shared
1236                   && (sec->flags & SEC_ALLOC) != 0
1237                   && h != NULL
1238                   && (h->root.type == bfd_link_hash_defweak
1239                       || !h->def_regular)))
1240             {
1241               struct elf_s390_dyn_relocs *p;
1242               struct elf_s390_dyn_relocs **head;
1243
1244               /* We must copy these reloc types into the output file.
1245                  Create a reloc section in dynobj and make room for
1246                  this reloc.  */
1247               if (sreloc == NULL)
1248                 {
1249                   const char *name;
1250                   bfd *dynobj;
1251
1252                   name = (bfd_elf_string_from_elf_section
1253                           (abfd,
1254                            elf_elfheader (abfd)->e_shstrndx,
1255                            elf_section_data (sec)->rel_hdr.sh_name));
1256                   if (name == NULL)
1257                     return FALSE;
1258
1259                   if (! CONST_STRNEQ (name, ".rela")
1260                       || strcmp (bfd_get_section_name (abfd, sec),
1261                                  name + 5) != 0)
1262                     {
1263                       (*_bfd_error_handler)
1264                         (_("%B: bad relocation section name `%s\'"),
1265                          abfd, name);
1266                     }
1267
1268                   if (htab->elf.dynobj == NULL)
1269                     htab->elf.dynobj = abfd;
1270
1271                   dynobj = htab->elf.dynobj;
1272                   sreloc = bfd_get_section_by_name (dynobj, name);
1273                   if (sreloc == NULL)
1274                     {
1275                       flagword flags;
1276
1277                       flags = (SEC_HAS_CONTENTS | SEC_READONLY
1278                                | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1279                       if ((sec->flags & SEC_ALLOC) != 0)
1280                         flags |= SEC_ALLOC | SEC_LOAD;
1281                       sreloc = bfd_make_section_with_flags (dynobj,
1282                                                             name,
1283                                                             flags);
1284                       if (sreloc == NULL
1285                           || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1286                         return FALSE;
1287                     }
1288                   elf_section_data (sec)->sreloc = sreloc;
1289                 }
1290
1291               /* If this is a global symbol, we count the number of
1292                  relocations we need for this symbol.  */
1293               if (h != NULL)
1294                 {
1295                   head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1296                 }
1297               else
1298                 {
1299                   /* Track dynamic relocs needed for local syms too.
1300                      We really need local syms available to do this
1301                      easily.  Oh well.  */
1302
1303                   asection *s;
1304                   void *vpp;
1305
1306                   s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1307                                                  sec, r_symndx);
1308                   if (s == NULL)
1309                     return FALSE;
1310
1311                   vpp = &elf_section_data (s)->local_dynrel;
1312                   head = (struct elf_s390_dyn_relocs **) vpp;
1313                 }
1314
1315               p = *head;
1316               if (p == NULL || p->sec != sec)
1317                 {
1318                   bfd_size_type amt = sizeof *p;
1319                   p = ((struct elf_s390_dyn_relocs *)
1320                        bfd_alloc (htab->elf.dynobj, amt));
1321                   if (p == NULL)
1322                     return FALSE;
1323                   p->next = *head;
1324                   *head = p;
1325                   p->sec = sec;
1326                   p->count = 0;
1327                   p->pc_count = 0;
1328                 }
1329
1330               p->count += 1;
1331               if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1332                   || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1333                   || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1334                   || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1335                   || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1336                 p->pc_count += 1;
1337             }
1338           break;
1339
1340           /* This relocation describes the C++ object vtable hierarchy.
1341              Reconstruct it for later use during GC.  */
1342         case R_390_GNU_VTINHERIT:
1343           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1344             return FALSE;
1345           break;
1346
1347           /* This relocation describes which C++ vtable entries are actually
1348              used.  Record for later use during GC.  */
1349         case R_390_GNU_VTENTRY:
1350           BFD_ASSERT (h != NULL);
1351           if (h != NULL
1352               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1353             return FALSE;
1354           break;
1355
1356         default:
1357           break;
1358         }
1359     }
1360
1361   return TRUE;
1362 }
1363
1364 /* Return the section that should be marked against GC for a given
1365    relocation.  */
1366
1367 static asection *
1368 elf_s390_gc_mark_hook (asection *sec,
1369                        struct bfd_link_info *info,
1370                        Elf_Internal_Rela *rel,
1371                        struct elf_link_hash_entry *h,
1372                        Elf_Internal_Sym *sym)
1373 {
1374   if (h != NULL)
1375     switch (ELF64_R_TYPE (rel->r_info))
1376       {
1377       case R_390_GNU_VTINHERIT:
1378       case R_390_GNU_VTENTRY:
1379         return NULL;
1380       }
1381
1382   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1383 }
1384
1385 /* Update the got entry reference counts for the section being removed.  */
1386
1387 static bfd_boolean
1388 elf_s390_gc_sweep_hook (bfd *abfd,
1389                         struct bfd_link_info *info,
1390                         asection *sec,
1391                         const Elf_Internal_Rela *relocs)
1392 {
1393   Elf_Internal_Shdr *symtab_hdr;
1394   struct elf_link_hash_entry **sym_hashes;
1395   bfd_signed_vma *local_got_refcounts;
1396   const Elf_Internal_Rela *rel, *relend;
1397
1398   if (info->relocatable)
1399     return TRUE;
1400
1401   elf_section_data (sec)->local_dynrel = NULL;
1402
1403   symtab_hdr = &elf_symtab_hdr (abfd);
1404   sym_hashes = elf_sym_hashes (abfd);
1405   local_got_refcounts = elf_local_got_refcounts (abfd);
1406
1407   relend = relocs + sec->reloc_count;
1408   for (rel = relocs; rel < relend; rel++)
1409     {
1410       unsigned long r_symndx;
1411       unsigned int r_type;
1412       struct elf_link_hash_entry *h = NULL;
1413
1414       r_symndx = ELF64_R_SYM (rel->r_info);
1415       if (r_symndx >= symtab_hdr->sh_info)
1416         {
1417           struct elf_s390_link_hash_entry *eh;
1418           struct elf_s390_dyn_relocs **pp;
1419           struct elf_s390_dyn_relocs *p;
1420
1421           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1422           while (h->root.type == bfd_link_hash_indirect
1423                  || h->root.type == bfd_link_hash_warning)
1424             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1425           eh = (struct elf_s390_link_hash_entry *) h;
1426
1427           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1428             if (p->sec == sec)
1429               {
1430                 /* Everything must go for SEC.  */
1431                 *pp = p->next;
1432                 break;
1433               }
1434         }
1435
1436       r_type = ELF64_R_TYPE (rel->r_info);
1437       r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1438       switch (r_type)
1439         {
1440         case R_390_TLS_LDM64:
1441           if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1442             elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1443           break;
1444
1445         case R_390_TLS_GD64:
1446         case R_390_TLS_IE64:
1447         case R_390_TLS_GOTIE12:
1448         case R_390_TLS_GOTIE20:
1449         case R_390_TLS_GOTIE64:
1450         case R_390_TLS_IEENT:
1451         case R_390_GOT12:
1452         case R_390_GOT16:
1453         case R_390_GOT20:
1454         case R_390_GOT32:
1455         case R_390_GOT64:
1456         case R_390_GOTOFF16:
1457         case R_390_GOTOFF32:
1458         case R_390_GOTOFF64:
1459         case R_390_GOTPC:
1460         case R_390_GOTPCDBL:
1461         case R_390_GOTENT:
1462           if (h != NULL)
1463             {
1464               if (h->got.refcount > 0)
1465                 h->got.refcount -= 1;
1466             }
1467           else if (local_got_refcounts != NULL)
1468             {
1469               if (local_got_refcounts[r_symndx] > 0)
1470                 local_got_refcounts[r_symndx] -= 1;
1471             }
1472           break;
1473
1474         case R_390_8:
1475         case R_390_12:
1476         case R_390_16:
1477         case R_390_20:
1478         case R_390_32:
1479         case R_390_64:
1480         case R_390_PC16:
1481         case R_390_PC16DBL:
1482         case R_390_PC32:
1483         case R_390_PC32DBL:
1484         case R_390_PC64:
1485           if (info->shared)
1486             break;
1487           /* Fall through */
1488
1489         case R_390_PLT16DBL:
1490         case R_390_PLT32:
1491         case R_390_PLT32DBL:
1492         case R_390_PLT64:
1493         case R_390_PLTOFF16:
1494         case R_390_PLTOFF32:
1495         case R_390_PLTOFF64:
1496           if (h != NULL)
1497             {
1498               if (h->plt.refcount > 0)
1499                 h->plt.refcount -= 1;
1500             }
1501           break;
1502
1503         case R_390_GOTPLT12:
1504         case R_390_GOTPLT16:
1505         case R_390_GOTPLT20:
1506         case R_390_GOTPLT32:
1507         case R_390_GOTPLT64:
1508         case R_390_GOTPLTENT:
1509           if (h != NULL)
1510             {
1511               if (h->plt.refcount > 0)
1512                 {
1513                   ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1514                   h->plt.refcount -= 1;
1515                 }
1516             }
1517           else if (local_got_refcounts != NULL)
1518             {
1519               if (local_got_refcounts[r_symndx] > 0)
1520                 local_got_refcounts[r_symndx] -= 1;
1521             }
1522           break;
1523
1524         default:
1525           break;
1526         }
1527     }
1528
1529   return TRUE;
1530 }
1531
1532 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1533    entry but we found we will not create any.  Called when we find we will
1534    not have any PLT for this symbol, by for example
1535    elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1536    or elf_s390_size_dynamic_sections if no dynamic sections will be
1537    created (we're only linking static objects).  */
1538
1539 static void
1540 elf_s390_adjust_gotplt (h)
1541      struct elf_s390_link_hash_entry *h;
1542 {
1543   if (h->elf.root.type == bfd_link_hash_warning)
1544     h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1545
1546   if (h->gotplt_refcount <= 0)
1547     return;
1548
1549   /* We simply add the number of gotplt references to the number
1550    * of got references for this symbol.  */
1551   h->elf.got.refcount += h->gotplt_refcount;
1552   h->gotplt_refcount = -1;
1553 }
1554
1555 /* Adjust a symbol defined by a dynamic object and referenced by a
1556    regular object.  The current definition is in some section of the
1557    dynamic object, but we're not including those sections.  We have to
1558    change the definition to something the rest of the link can
1559    understand.  */
1560
1561 static bfd_boolean
1562 elf_s390_adjust_dynamic_symbol (info, h)
1563      struct bfd_link_info *info;
1564      struct elf_link_hash_entry *h;
1565 {
1566   struct elf_s390_link_hash_table *htab;
1567   asection *s;
1568
1569   /* If this is a function, put it in the procedure linkage table.  We
1570      will fill in the contents of the procedure linkage table later
1571      (although we could actually do it here).  */
1572   if (h->type == STT_FUNC
1573       || h->needs_plt)
1574     {
1575       if (h->plt.refcount <= 0
1576           || (! info->shared
1577               && !h->def_dynamic
1578               && !h->ref_dynamic
1579               && h->root.type != bfd_link_hash_undefweak
1580               && h->root.type != bfd_link_hash_undefined))
1581         {
1582           /* This case can occur if we saw a PLT32 reloc in an input
1583              file, but the symbol was never referred to by a dynamic
1584              object, or if all references were garbage collected.  In
1585              such a case, we don't actually need to build a procedure
1586              linkage table, and we can just do a PC32 reloc instead.  */
1587           h->plt.offset = (bfd_vma) -1;
1588           h->needs_plt = 0;
1589           elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1590         }
1591
1592       return TRUE;
1593     }
1594   else
1595     /* It's possible that we incorrectly decided a .plt reloc was
1596        needed for an R_390_PC32 reloc to a non-function sym in
1597        check_relocs.  We can't decide accurately between function and
1598        non-function syms in check-relocs;  Objects loaded later in
1599        the link may change h->type.  So fix it now.  */
1600     h->plt.offset = (bfd_vma) -1;
1601
1602   /* If this is a weak symbol, and there is a real definition, the
1603      processor independent code will have arranged for us to see the
1604      real definition first, and we can just use the same value.  */
1605   if (h->u.weakdef != NULL)
1606     {
1607       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1608                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
1609       h->root.u.def.section = h->u.weakdef->root.u.def.section;
1610       h->root.u.def.value = h->u.weakdef->root.u.def.value;
1611       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1612         h->non_got_ref = h->u.weakdef->non_got_ref;
1613       return TRUE;
1614     }
1615
1616   /* This is a reference to a symbol defined by a dynamic object which
1617      is not a function.  */
1618
1619   /* If we are creating a shared library, we must presume that the
1620      only references to the symbol are via the global offset table.
1621      For such cases we need not do anything here; the relocations will
1622      be handled correctly by relocate_section.  */
1623   if (info->shared)
1624     return TRUE;
1625
1626   /* If there are no references to this symbol that do not use the
1627      GOT, we don't need to generate a copy reloc.  */
1628   if (!h->non_got_ref)
1629     return TRUE;
1630
1631   /* If -z nocopyreloc was given, we won't generate them either.  */
1632   if (info->nocopyreloc)
1633     {
1634       h->non_got_ref = 0;
1635       return TRUE;
1636     }
1637
1638   if (ELIMINATE_COPY_RELOCS)
1639     {
1640       struct elf_s390_link_hash_entry * eh;
1641       struct elf_s390_dyn_relocs *p;
1642
1643       eh = (struct elf_s390_link_hash_entry *) h;
1644       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1645         {
1646           s = p->sec->output_section;
1647           if (s != NULL && (s->flags & SEC_READONLY) != 0)
1648             break;
1649         }
1650
1651       /* If we didn't find any dynamic relocs in read-only sections, then
1652          we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1653       if (p == NULL)
1654         {
1655           h->non_got_ref = 0;
1656           return TRUE;
1657         }
1658     }
1659
1660   if (h->size == 0)
1661     {
1662       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1663                              h->root.root.string);
1664       return TRUE;
1665     }
1666
1667   /* We must allocate the symbol in our .dynbss section, which will
1668      become part of the .bss section of the executable.  There will be
1669      an entry for this symbol in the .dynsym section.  The dynamic
1670      object will contain position independent code, so all references
1671      from the dynamic object to this symbol will go through the global
1672      offset table.  The dynamic linker will use the .dynsym entry to
1673      determine the address it must put in the global offset table, so
1674      both the dynamic object and the regular object will refer to the
1675      same memory location for the variable.  */
1676
1677   htab = elf_s390_hash_table (info);
1678
1679   /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1680      copy the initial value out of the dynamic object and into the
1681      runtime process image.  */
1682   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1683     {
1684       htab->srelbss->size += sizeof (Elf64_External_Rela);
1685       h->needs_copy = 1;
1686     }
1687
1688   s = htab->sdynbss;
1689
1690   return _bfd_elf_adjust_dynamic_copy (h, s);
1691 }
1692
1693 /* Allocate space in .plt, .got and associated reloc sections for
1694    dynamic relocs.  */
1695
1696 static bfd_boolean
1697 allocate_dynrelocs (h, inf)
1698      struct elf_link_hash_entry *h;
1699      PTR inf;
1700 {
1701   struct bfd_link_info *info;
1702   struct elf_s390_link_hash_table *htab;
1703   struct elf_s390_link_hash_entry *eh;
1704   struct elf_s390_dyn_relocs *p;
1705
1706   if (h->root.type == bfd_link_hash_indirect)
1707     return TRUE;
1708
1709   if (h->root.type == bfd_link_hash_warning)
1710     /* When warning symbols are created, they **replace** the "real"
1711        entry in the hash table, thus we never get to see the real
1712        symbol in a hash traversal.  So look at it now.  */
1713     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1714
1715   info = (struct bfd_link_info *) inf;
1716   htab = elf_s390_hash_table (info);
1717
1718   if (htab->elf.dynamic_sections_created
1719       && h->plt.refcount > 0
1720       && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1721           || h->root.type != bfd_link_hash_undefweak))
1722     {
1723       /* Make sure this symbol is output as a dynamic symbol.
1724          Undefined weak syms won't yet be marked as dynamic.  */
1725       if (h->dynindx == -1
1726           && !h->forced_local)
1727         {
1728           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1729             return FALSE;
1730         }
1731
1732       if (info->shared
1733           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1734         {
1735           asection *s = htab->splt;
1736
1737           /* If this is the first .plt entry, make room for the special
1738              first entry.  */
1739           if (s->size == 0)
1740             s->size += PLT_FIRST_ENTRY_SIZE;
1741
1742           h->plt.offset = s->size;
1743
1744           /* If this symbol is not defined in a regular file, and we are
1745              not generating a shared library, then set the symbol to this
1746              location in the .plt.  This is required to make function
1747              pointers compare as equal between the normal executable and
1748              the shared library.  */
1749           if (! info->shared
1750               && !h->def_regular)
1751             {
1752               h->root.u.def.section = s;
1753               h->root.u.def.value = h->plt.offset;
1754             }
1755
1756           /* Make room for this entry.  */
1757           s->size += PLT_ENTRY_SIZE;
1758
1759           /* We also need to make an entry in the .got.plt section, which
1760              will be placed in the .got section by the linker script.  */
1761           htab->sgotplt->size += GOT_ENTRY_SIZE;
1762
1763           /* We also need to make an entry in the .rela.plt section.  */
1764           htab->srelplt->size += sizeof (Elf64_External_Rela);
1765         }
1766       else
1767         {
1768           h->plt.offset = (bfd_vma) -1;
1769           h->needs_plt = 0;
1770           elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1771         }
1772     }
1773   else
1774     {
1775       h->plt.offset = (bfd_vma) -1;
1776       h->needs_plt = 0;
1777       elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1778     }
1779
1780   /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1781      the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1782      to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1783      we can save the dynamic TLS relocation.  */
1784   if (h->got.refcount > 0
1785       && !info->shared
1786       && h->dynindx == -1
1787       && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1788     {
1789       if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1790         /* For the GOTIE access without a literal pool entry the offset has
1791            to be stored somewhere. The immediate value in the instruction
1792            is not bit enough so the value is stored in the got.  */
1793         {
1794           h->got.offset = htab->sgot->size;
1795           htab->sgot->size += GOT_ENTRY_SIZE;
1796         }
1797       else
1798         h->got.offset = (bfd_vma) -1;
1799     }
1800   else if (h->got.refcount > 0)
1801     {
1802       asection *s;
1803       bfd_boolean dyn;
1804       int tls_type = elf_s390_hash_entry(h)->tls_type;
1805
1806       /* Make sure this symbol is output as a dynamic symbol.
1807          Undefined weak syms won't yet be marked as dynamic.  */
1808       if (h->dynindx == -1
1809           && !h->forced_local)
1810         {
1811           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1812             return FALSE;
1813         }
1814
1815       s = htab->sgot;
1816       h->got.offset = s->size;
1817       s->size += GOT_ENTRY_SIZE;
1818       /* R_390_TLS_GD64 needs 2 consecutive GOT slots.  */
1819       if (tls_type == GOT_TLS_GD)
1820         s->size += GOT_ENTRY_SIZE;
1821       dyn = htab->elf.dynamic_sections_created;
1822       /* R_390_TLS_IE64 needs one dynamic relocation,
1823          R_390_TLS_GD64 needs one if local symbol and two if global.  */
1824       if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1825           || tls_type >= GOT_TLS_IE)
1826         htab->srelgot->size += sizeof (Elf64_External_Rela);
1827       else if (tls_type == GOT_TLS_GD)
1828         htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1829       else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1830                 || h->root.type != bfd_link_hash_undefweak)
1831                && (info->shared
1832                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1833         htab->srelgot->size += sizeof (Elf64_External_Rela);
1834     }
1835   else
1836     h->got.offset = (bfd_vma) -1;
1837
1838   eh = (struct elf_s390_link_hash_entry *) h;
1839   if (eh->dyn_relocs == NULL)
1840     return TRUE;
1841
1842   /* In the shared -Bsymbolic case, discard space allocated for
1843      dynamic pc-relative relocs against symbols which turn out to be
1844      defined in regular objects.  For the normal shared case, discard
1845      space for pc-relative relocs that have become local due to symbol
1846      visibility changes.  */
1847
1848   if (info->shared)
1849     {
1850       if (SYMBOL_REFERENCES_LOCAL (info, h))
1851         {
1852           struct elf_s390_dyn_relocs **pp;
1853
1854           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1855             {
1856               p->count -= p->pc_count;
1857               p->pc_count = 0;
1858               if (p->count == 0)
1859                 *pp = p->next;
1860               else
1861                 pp = &p->next;
1862             }
1863         }
1864
1865       /* Also discard relocs on undefined weak syms with non-default
1866          visibility.  */
1867       if (eh->dyn_relocs != NULL
1868           && h->root.type == bfd_link_hash_undefweak)
1869         {
1870           if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1871             eh->dyn_relocs = NULL;
1872
1873           /* Make sure undefined weak symbols are output as a dynamic
1874              symbol in PIEs.  */
1875           else if (h->dynindx == -1
1876                    && !h->forced_local)
1877             {
1878               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1879                 return FALSE;
1880             }
1881         }
1882     }
1883   else if (ELIMINATE_COPY_RELOCS)
1884     {
1885       /* For the non-shared case, discard space for relocs against
1886          symbols which turn out to need copy relocs or are not
1887          dynamic.  */
1888
1889       if (!h->non_got_ref
1890           && ((h->def_dynamic
1891                && !h->def_regular)
1892               || (htab->elf.dynamic_sections_created
1893                   && (h->root.type == bfd_link_hash_undefweak
1894                       || h->root.type == bfd_link_hash_undefined))))
1895         {
1896           /* Make sure this symbol is output as a dynamic symbol.
1897              Undefined weak syms won't yet be marked as dynamic.  */
1898           if (h->dynindx == -1
1899               && !h->forced_local)
1900             {
1901               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1902                 return FALSE;
1903             }
1904
1905           /* If that succeeded, we know we'll be keeping all the
1906              relocs.  */
1907           if (h->dynindx != -1)
1908             goto keep;
1909         }
1910
1911       eh->dyn_relocs = NULL;
1912
1913     keep: ;
1914     }
1915
1916   /* Finally, allocate space.  */
1917   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1918     {
1919       asection *sreloc = elf_section_data (p->sec)->sreloc;
1920       sreloc->size += p->count * sizeof (Elf64_External_Rela);
1921     }
1922
1923   return TRUE;
1924 }
1925
1926 /* Find any dynamic relocs that apply to read-only sections.  */
1927
1928 static bfd_boolean
1929 readonly_dynrelocs (h, inf)
1930      struct elf_link_hash_entry *h;
1931      PTR inf;
1932 {
1933   struct elf_s390_link_hash_entry *eh;
1934   struct elf_s390_dyn_relocs *p;
1935
1936   if (h->root.type == bfd_link_hash_warning)
1937     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1938
1939   eh = (struct elf_s390_link_hash_entry *) h;
1940   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1941     {
1942       asection *s = p->sec->output_section;
1943
1944       if (s != NULL && (s->flags & SEC_READONLY) != 0)
1945         {
1946           struct bfd_link_info *info = (struct bfd_link_info *) inf;
1947
1948           info->flags |= DF_TEXTREL;
1949
1950           /* Not an error, just cut short the traversal.  */
1951           return FALSE;
1952         }
1953     }
1954   return TRUE;
1955 }
1956
1957 /* Set the sizes of the dynamic sections.  */
1958
1959 static bfd_boolean
1960 elf_s390_size_dynamic_sections (output_bfd, info)
1961      bfd *output_bfd ATTRIBUTE_UNUSED;
1962      struct bfd_link_info *info;
1963 {
1964   struct elf_s390_link_hash_table *htab;
1965   bfd *dynobj;
1966   asection *s;
1967   bfd_boolean relocs;
1968   bfd *ibfd;
1969
1970   htab = elf_s390_hash_table (info);
1971   dynobj = htab->elf.dynobj;
1972   if (dynobj == NULL)
1973     abort ();
1974
1975   if (htab->elf.dynamic_sections_created)
1976     {
1977       /* Set the contents of the .interp section to the interpreter.  */
1978       if (info->executable)
1979         {
1980           s = bfd_get_section_by_name (dynobj, ".interp");
1981           if (s == NULL)
1982             abort ();
1983           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1984           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1985         }
1986     }
1987
1988   /* Set up .got offsets for local syms, and space for local dynamic
1989      relocs.  */
1990   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1991     {
1992       bfd_signed_vma *local_got;
1993       bfd_signed_vma *end_local_got;
1994       char *local_tls_type;
1995       bfd_size_type locsymcount;
1996       Elf_Internal_Shdr *symtab_hdr;
1997       asection *srela;
1998
1999       if (! is_s390_elf (ibfd))
2000         continue;
2001
2002       for (s = ibfd->sections; s != NULL; s = s->next)
2003         {
2004           struct elf_s390_dyn_relocs *p;
2005
2006           for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2007             {
2008               if (!bfd_is_abs_section (p->sec)
2009                   && bfd_is_abs_section (p->sec->output_section))
2010                 {
2011                   /* Input section has been discarded, either because
2012                      it is a copy of a linkonce section or due to
2013                      linker script /DISCARD/, so we'll be discarding
2014                      the relocs too.  */
2015                 }
2016               else if (p->count != 0)
2017                 {
2018                   srela = elf_section_data (p->sec)->sreloc;
2019                   srela->size += p->count * sizeof (Elf64_External_Rela);
2020                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2021                     info->flags |= DF_TEXTREL;
2022                 }
2023             }
2024         }
2025
2026       local_got = elf_local_got_refcounts (ibfd);
2027       if (!local_got)
2028         continue;
2029
2030       symtab_hdr = &elf_symtab_hdr (ibfd);
2031       locsymcount = symtab_hdr->sh_info;
2032       end_local_got = local_got + locsymcount;
2033       local_tls_type = elf_s390_local_got_tls_type (ibfd);
2034       s = htab->sgot;
2035       srela = htab->srelgot;
2036       for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2037         {
2038           if (*local_got > 0)
2039             {
2040               *local_got = s->size;
2041               s->size += GOT_ENTRY_SIZE;
2042               if (*local_tls_type == GOT_TLS_GD)
2043                 s->size += GOT_ENTRY_SIZE;
2044               if (info->shared)
2045                 srela->size += sizeof (Elf64_External_Rela);
2046             }
2047           else
2048             *local_got = (bfd_vma) -1;
2049         }
2050     }
2051
2052   if (htab->tls_ldm_got.refcount > 0)
2053     {
2054       /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2055          relocs.  */
2056       htab->tls_ldm_got.offset = htab->sgot->size;
2057       htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2058       htab->srelgot->size += sizeof (Elf64_External_Rela);
2059     }
2060   else
2061     htab->tls_ldm_got.offset = -1;
2062
2063   /* Allocate global sym .plt and .got entries, and space for global
2064      sym dynamic relocs.  */
2065   elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2066
2067   /* We now have determined the sizes of the various dynamic sections.
2068      Allocate memory for them.  */
2069   relocs = FALSE;
2070   for (s = dynobj->sections; s != NULL; s = s->next)
2071     {
2072       if ((s->flags & SEC_LINKER_CREATED) == 0)
2073         continue;
2074
2075       if (s == htab->splt
2076           || s == htab->sgot
2077           || s == htab->sgotplt
2078           || s == htab->sdynbss)
2079         {
2080           /* Strip this section if we don't need it; see the
2081              comment below.  */
2082         }
2083       else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2084         {
2085           if (s->size != 0 && s != htab->srelplt)
2086             relocs = TRUE;
2087
2088           /* We use the reloc_count field as a counter if we need
2089              to copy relocs into the output file.  */
2090           s->reloc_count = 0;
2091         }
2092       else
2093         {
2094           /* It's not one of our sections, so don't allocate space.  */
2095           continue;
2096         }
2097
2098       if (s->size == 0)
2099         {
2100           /* If we don't need this section, strip it from the
2101              output file.  This is to handle .rela.bss and
2102              .rela.plt.  We must create it in
2103              create_dynamic_sections, because it must be created
2104              before the linker maps input sections to output
2105              sections.  The linker does that before
2106              adjust_dynamic_symbol is called, and it is that
2107              function which decides whether anything needs to go
2108              into these sections.  */
2109
2110           s->flags |= SEC_EXCLUDE;
2111           continue;
2112         }
2113
2114       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2115         continue;
2116
2117       /* Allocate memory for the section contents.  We use bfd_zalloc
2118          here in case unused entries are not reclaimed before the
2119          section's contents are written out.  This should not happen,
2120          but this way if it does, we get a R_390_NONE reloc instead
2121          of garbage.  */
2122       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2123       if (s->contents == NULL)
2124         return FALSE;
2125     }
2126
2127   if (htab->elf.dynamic_sections_created)
2128     {
2129       /* Add some entries to the .dynamic section.  We fill in the
2130          values later, in elf_s390_finish_dynamic_sections, but we
2131          must add the entries now so that we get the correct size for
2132          the .dynamic section.  The DT_DEBUG entry is filled in by the
2133          dynamic linker and used by the debugger.  */
2134 #define add_dynamic_entry(TAG, VAL) \
2135   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2136
2137       if (info->executable)
2138         {
2139           if (!add_dynamic_entry (DT_DEBUG, 0))
2140             return FALSE;
2141         }
2142
2143       if (htab->splt->size != 0)
2144         {
2145           if (!add_dynamic_entry (DT_PLTGOT, 0)
2146               || !add_dynamic_entry (DT_PLTRELSZ, 0)
2147               || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2148               || !add_dynamic_entry (DT_JMPREL, 0))
2149             return FALSE;
2150         }
2151
2152       if (relocs)
2153         {
2154           if (!add_dynamic_entry (DT_RELA, 0)
2155               || !add_dynamic_entry (DT_RELASZ, 0)
2156               || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2157             return FALSE;
2158
2159           /* If any dynamic relocs apply to a read-only section,
2160              then we need a DT_TEXTREL entry.  */
2161           if ((info->flags & DF_TEXTREL) == 0)
2162             elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2163                                     (PTR) info);
2164
2165           if ((info->flags & DF_TEXTREL) != 0)
2166             {
2167               if (!add_dynamic_entry (DT_TEXTREL, 0))
2168                 return FALSE;
2169             }
2170         }
2171     }
2172 #undef add_dynamic_entry
2173
2174   return TRUE;
2175 }
2176
2177 /* Return the base VMA address which should be subtracted from real addresses
2178    when resolving @dtpoff relocation.
2179    This is PT_TLS segment p_vaddr.  */
2180
2181 static bfd_vma
2182 dtpoff_base (info)
2183      struct bfd_link_info *info;
2184 {
2185   /* If tls_sec is NULL, we should have signalled an error already.  */
2186   if (elf_hash_table (info)->tls_sec == NULL)
2187     return 0;
2188   return elf_hash_table (info)->tls_sec->vma;
2189 }
2190
2191 /* Return the relocation value for @tpoff relocation
2192    if STT_TLS virtual address is ADDRESS.  */
2193
2194 static bfd_vma
2195 tpoff (info, address)
2196      struct bfd_link_info *info;
2197      bfd_vma address;
2198 {
2199   struct elf_link_hash_table *htab = elf_hash_table (info);
2200
2201   /* If tls_sec is NULL, we should have signalled an error already.  */
2202   if (htab->tls_sec == NULL)
2203     return 0;
2204   return htab->tls_size + htab->tls_sec->vma - address;
2205 }
2206
2207 /* Complain if TLS instruction relocation is against an invalid
2208    instruction.  */
2209
2210 static void
2211 invalid_tls_insn (input_bfd, input_section, rel)
2212      bfd *input_bfd;
2213      asection *input_section;
2214      Elf_Internal_Rela *rel;
2215 {
2216   reloc_howto_type *howto;
2217
2218   howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2219   (*_bfd_error_handler)
2220     (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2221      input_bfd,
2222      input_section,
2223      (long) rel->r_offset,
2224      howto->name);
2225   bfd_set_error (bfd_error_bad_value);
2226 }
2227
2228 /* Relocate a 390 ELF section.  */
2229
2230 static bfd_boolean
2231 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2232                               contents, relocs, local_syms, local_sections)
2233      bfd *output_bfd;
2234      struct bfd_link_info *info;
2235      bfd *input_bfd;
2236      asection *input_section;
2237      bfd_byte *contents;
2238      Elf_Internal_Rela *relocs;
2239      Elf_Internal_Sym *local_syms;
2240      asection **local_sections;
2241 {
2242   struct elf_s390_link_hash_table *htab;
2243   Elf_Internal_Shdr *symtab_hdr;
2244   struct elf_link_hash_entry **sym_hashes;
2245   bfd_vma *local_got_offsets;
2246   Elf_Internal_Rela *rel;
2247   Elf_Internal_Rela *relend;
2248
2249   BFD_ASSERT (is_s390_elf (input_bfd));
2250
2251   htab = elf_s390_hash_table (info);
2252   symtab_hdr = &elf_symtab_hdr (input_bfd);
2253   sym_hashes = elf_sym_hashes (input_bfd);
2254   local_got_offsets = elf_local_got_offsets (input_bfd);
2255
2256   rel = relocs;
2257   relend = relocs + input_section->reloc_count;
2258   for (; rel < relend; rel++)
2259     {
2260       unsigned int r_type;
2261       reloc_howto_type *howto;
2262       unsigned long r_symndx;
2263       struct elf_link_hash_entry *h;
2264       Elf_Internal_Sym *sym;
2265       asection *sec;
2266       bfd_vma off;
2267       bfd_vma relocation;
2268       bfd_boolean unresolved_reloc;
2269       bfd_reloc_status_type r;
2270       int tls_type;
2271
2272       r_type = ELF64_R_TYPE (rel->r_info);
2273       if (r_type == (int) R_390_GNU_VTINHERIT
2274           || r_type == (int) R_390_GNU_VTENTRY)
2275         continue;
2276       if (r_type >= (int) R_390_max)
2277         {
2278           bfd_set_error (bfd_error_bad_value);
2279           return FALSE;
2280         }
2281
2282       howto = elf_howto_table + r_type;
2283       r_symndx = ELF64_R_SYM (rel->r_info);
2284
2285       h = NULL;
2286       sym = NULL;
2287       sec = NULL;
2288       unresolved_reloc = FALSE;
2289       if (r_symndx < symtab_hdr->sh_info)
2290         {
2291           sym = local_syms + r_symndx;
2292           sec = local_sections[r_symndx];
2293           relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2294         }
2295       else
2296         {
2297           bfd_boolean warned ATTRIBUTE_UNUSED;
2298
2299           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2300                                    r_symndx, symtab_hdr, sym_hashes,
2301                                    h, sec, relocation,
2302                                    unresolved_reloc, warned);
2303         }
2304
2305       if (sec != NULL && elf_discarded_section (sec))
2306         {
2307           /* For relocs against symbols from removed linkonce sections,
2308              or sections discarded by a linker script, we just want the
2309              section contents zeroed.  Avoid any special processing.  */
2310           _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2311           rel->r_info = 0;
2312           rel->r_addend = 0;
2313           continue;
2314         }
2315
2316       if (info->relocatable)
2317         continue;
2318
2319       switch (r_type)
2320         {
2321         case R_390_GOTPLT12:
2322         case R_390_GOTPLT16:
2323         case R_390_GOTPLT20:
2324         case R_390_GOTPLT32:
2325         case R_390_GOTPLT64:
2326         case R_390_GOTPLTENT:
2327           /* There are three cases for a GOTPLT relocation. 1) The
2328              relocation is against the jump slot entry of a plt that
2329              will get emitted to the output file. 2) The relocation
2330              is against the jump slot of a plt entry that has been
2331              removed. elf_s390_adjust_gotplt has created a GOT entry
2332              as replacement. 3) The relocation is against a local symbol.
2333              Cases 2) and 3) are the same as the GOT relocation code
2334              so we just have to test for case 1 and fall through for
2335              the other two.  */
2336           if (h != NULL && h->plt.offset != (bfd_vma) -1)
2337             {
2338               bfd_vma plt_index;
2339
2340               /* Calc. index no.
2341                  Current offset - size first entry / entry size.  */
2342               plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2343                 PLT_ENTRY_SIZE;
2344
2345               /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2346                  addr & GOT addr.  */
2347               relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2348               unresolved_reloc = FALSE;
2349
2350               if (r_type == R_390_GOTPLTENT)
2351                 relocation += htab->sgot->output_section->vma;
2352               break;
2353             }
2354           /* Fall through.  */
2355
2356         case R_390_GOT12:
2357         case R_390_GOT16:
2358         case R_390_GOT20:
2359         case R_390_GOT32:
2360         case R_390_GOT64:
2361         case R_390_GOTENT:
2362           /* Relocation is to the entry for this symbol in the global
2363              offset table.  */
2364           if (htab->sgot == NULL)
2365             abort ();
2366
2367           if (h != NULL)
2368             {
2369               bfd_boolean dyn;
2370
2371               off = h->got.offset;
2372               dyn = htab->elf.dynamic_sections_created;
2373               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2374                   || (info->shared
2375                       && (info->symbolic
2376                           || h->dynindx == -1
2377                           || h->forced_local)
2378                       && h->def_regular)
2379                   || (ELF_ST_VISIBILITY (h->other)
2380                       && h->root.type == bfd_link_hash_undefweak))
2381                 {
2382                   /* This is actually a static link, or it is a
2383                      -Bsymbolic link and the symbol is defined
2384                      locally, or the symbol was forced to be local
2385                      because of a version file.  We must initialize
2386                      this entry in the global offset table.  Since the
2387                      offset must always be a multiple of 2, we use the
2388                      least significant bit to record whether we have
2389                      initialized it already.
2390
2391                      When doing a dynamic link, we create a .rel.got
2392                      relocation entry to initialize the value.  This
2393                      is done in the finish_dynamic_symbol routine.  */
2394                   if ((off & 1) != 0)
2395                     off &= ~1;
2396                   else
2397                     {
2398                       bfd_put_64 (output_bfd, relocation,
2399                                   htab->sgot->contents + off);
2400                       h->got.offset |= 1;
2401                     }
2402                 }
2403               else
2404                 unresolved_reloc = FALSE;
2405             }
2406           else
2407             {
2408               if (local_got_offsets == NULL)
2409                 abort ();
2410
2411               off = local_got_offsets[r_symndx];
2412
2413               /* The offset must always be a multiple of 8.  We use
2414                  the least significant bit to record whether we have
2415                  already generated the necessary reloc.  */
2416               if ((off & 1) != 0)
2417                 off &= ~1;
2418               else
2419                 {
2420                   bfd_put_64 (output_bfd, relocation,
2421                               htab->sgot->contents + off);
2422
2423                   if (info->shared)
2424                     {
2425                       asection *s;
2426                       Elf_Internal_Rela outrel;
2427                       bfd_byte *loc;
2428
2429                       s = htab->srelgot;
2430                       if (s == NULL)
2431                         abort ();
2432
2433                       outrel.r_offset = (htab->sgot->output_section->vma
2434                                          + htab->sgot->output_offset
2435                                          + off);
2436                       outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2437                       outrel.r_addend = relocation;
2438                       loc = s->contents;
2439                       loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2440                       bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2441                     }
2442
2443                   local_got_offsets[r_symndx] |= 1;
2444                 }
2445             }
2446
2447           if (off >= (bfd_vma) -2)
2448             abort ();
2449
2450           relocation = htab->sgot->output_offset + off;
2451
2452           /* For @GOTENT the relocation is against the offset between
2453              the instruction and the symbols entry in the GOT and not
2454              between the start of the GOT and the symbols entry. We
2455              add the vma of the GOT to get the correct value.  */
2456           if (   r_type == R_390_GOTENT
2457               || r_type == R_390_GOTPLTENT)
2458             relocation += htab->sgot->output_section->vma;
2459
2460           break;
2461
2462         case R_390_GOTOFF16:
2463         case R_390_GOTOFF32:
2464         case R_390_GOTOFF64:
2465           /* Relocation is relative to the start of the global offset
2466              table.  */
2467
2468           /* Note that sgot->output_offset is not involved in this
2469              calculation.  We always want the start of .got.  If we
2470              defined _GLOBAL_OFFSET_TABLE in a different way, as is
2471              permitted by the ABI, we might have to change this
2472              calculation.  */
2473           relocation -= htab->sgot->output_section->vma;
2474           break;
2475
2476         case R_390_GOTPC:
2477         case R_390_GOTPCDBL:
2478           /* Use global offset table as symbol value.  */
2479           relocation = htab->sgot->output_section->vma;
2480           unresolved_reloc = FALSE;
2481           break;
2482
2483         case R_390_PLT16DBL:
2484         case R_390_PLT32:
2485         case R_390_PLT32DBL:
2486         case R_390_PLT64:
2487           /* Relocation is to the entry for this symbol in the
2488              procedure linkage table.  */
2489
2490           /* Resolve a PLT32 reloc against a local symbol directly,
2491              without using the procedure linkage table.  */
2492           if (h == NULL)
2493             break;
2494
2495           if (h->plt.offset == (bfd_vma) -1
2496               || htab->splt == NULL)
2497             {
2498               /* We didn't make a PLT entry for this symbol.  This
2499                  happens when statically linking PIC code, or when
2500                  using -Bsymbolic.  */
2501               break;
2502             }
2503
2504           relocation = (htab->splt->output_section->vma
2505                         + htab->splt->output_offset
2506                         + h->plt.offset);
2507           unresolved_reloc = FALSE;
2508           break;
2509
2510         case R_390_PLTOFF16:
2511         case R_390_PLTOFF32:
2512         case R_390_PLTOFF64:
2513           /* Relocation is to the entry for this symbol in the
2514              procedure linkage table relative to the start of the GOT.  */
2515
2516           /* For local symbols or if we didn't make a PLT entry for
2517              this symbol resolve the symbol directly.  */
2518           if (   h == NULL
2519               || h->plt.offset == (bfd_vma) -1
2520               || htab->splt == NULL)
2521             {
2522               relocation -= htab->sgot->output_section->vma;
2523               break;
2524             }
2525
2526           relocation = (htab->splt->output_section->vma
2527                         + htab->splt->output_offset
2528                         + h->plt.offset
2529                         - htab->sgot->output_section->vma);
2530           unresolved_reloc = FALSE;
2531           break;
2532
2533         case R_390_8:
2534         case R_390_16:
2535         case R_390_32:
2536         case R_390_64:
2537         case R_390_PC16:
2538         case R_390_PC16DBL:
2539         case R_390_PC32:
2540         case R_390_PC32DBL:
2541         case R_390_PC64:
2542           if ((input_section->flags & SEC_ALLOC) == 0)
2543             break;
2544
2545           if ((info->shared
2546                && (h == NULL
2547                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2548                    || h->root.type != bfd_link_hash_undefweak)
2549                && ((r_type != R_390_PC16
2550                     && r_type != R_390_PC16DBL
2551                     && r_type != R_390_PC32
2552                     && r_type != R_390_PC32DBL
2553                     && r_type != R_390_PC64)
2554                    || (h != NULL
2555                        && !SYMBOL_REFERENCES_LOCAL (info, h))))
2556               || (ELIMINATE_COPY_RELOCS
2557                   && !info->shared
2558                   && h != NULL
2559                   && h->dynindx != -1
2560                   && !h->non_got_ref
2561                   && ((h->def_dynamic
2562                        && !h->def_regular)
2563                       || h->root.type == bfd_link_hash_undefweak
2564                       || h->root.type == bfd_link_hash_undefined)))
2565             {
2566               Elf_Internal_Rela outrel;
2567               bfd_boolean skip, relocate;
2568               asection *sreloc;
2569               bfd_byte *loc;
2570
2571               /* When generating a shared object, these relocations
2572                  are copied into the output file to be resolved at run
2573                  time.  */
2574               skip = FALSE;
2575               relocate = FALSE;
2576
2577               outrel.r_offset =
2578                 _bfd_elf_section_offset (output_bfd, info, input_section,
2579                                          rel->r_offset);
2580               if (outrel.r_offset == (bfd_vma) -1)
2581                 skip = TRUE;
2582               else if (outrel.r_offset == (bfd_vma) -2)
2583                 skip = TRUE, relocate = TRUE;
2584
2585               outrel.r_offset += (input_section->output_section->vma
2586                                   + input_section->output_offset);
2587
2588               if (skip)
2589                 memset (&outrel, 0, sizeof outrel);
2590               else if (h != NULL
2591                        && h->dynindx != -1
2592                        && (r_type == R_390_PC16
2593                            || r_type == R_390_PC16DBL
2594                            || r_type == R_390_PC32
2595                            || r_type == R_390_PC32DBL
2596                            || r_type == R_390_PC64
2597                            || !info->shared
2598                            || !info->symbolic
2599                            || !h->def_regular))
2600                 {
2601                   outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2602                   outrel.r_addend = rel->r_addend;
2603                 }
2604               else
2605                 {
2606                   /* This symbol is local, or marked to become local.  */
2607                   outrel.r_addend = relocation + rel->r_addend;
2608                   if (r_type == R_390_64)
2609                     {
2610                       relocate = TRUE;
2611                       outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2612                     }
2613                   else
2614                     {
2615                       long sindx;
2616
2617                       if (bfd_is_abs_section (sec))
2618                         sindx = 0;
2619                       else if (sec == NULL || sec->owner == NULL)
2620                         {
2621                           bfd_set_error(bfd_error_bad_value);
2622                           return FALSE;
2623                         }
2624                       else
2625                         {
2626                           asection *osec;
2627
2628                           osec = sec->output_section;
2629                           sindx = elf_section_data (osec)->dynindx;
2630
2631                           if (sindx == 0)
2632                             {
2633                               osec = htab->elf.text_index_section;
2634                               sindx = elf_section_data (osec)->dynindx;
2635                             }
2636                           BFD_ASSERT (sindx != 0);
2637
2638                           /* We are turning this relocation into one
2639                              against a section symbol, so subtract out
2640                              the output section's address but not the
2641                              offset of the input section in the output
2642                              section.  */
2643                           outrel.r_addend -= osec->vma;
2644                         }
2645                       outrel.r_info = ELF64_R_INFO (sindx, r_type);
2646                     }
2647                 }
2648
2649               sreloc = elf_section_data (input_section)->sreloc;
2650               if (sreloc == NULL)
2651                 abort ();
2652
2653               loc = sreloc->contents;
2654               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2655               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2656
2657               /* If this reloc is against an external symbol, we do
2658                  not want to fiddle with the addend.  Otherwise, we
2659                  need to include the symbol value so that it becomes
2660                  an addend for the dynamic reloc.  */
2661               if (! relocate)
2662                 continue;
2663             }
2664
2665           break;
2666
2667           /* Relocations for tls literal pool entries.  */
2668         case R_390_TLS_IE64:
2669           if (info->shared)
2670             {
2671               Elf_Internal_Rela outrel;
2672               asection *sreloc;
2673               bfd_byte *loc;
2674
2675               outrel.r_offset = rel->r_offset
2676                                 + input_section->output_section->vma
2677                                 + input_section->output_offset;
2678               outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2679               sreloc = elf_section_data (input_section)->sreloc;
2680               if (sreloc == NULL)
2681                 abort ();
2682               loc = sreloc->contents;
2683               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2684               bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2685             }
2686           /* Fall through.  */
2687
2688         case R_390_TLS_GD64:
2689         case R_390_TLS_GOTIE64:
2690           r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2691           tls_type = GOT_UNKNOWN;
2692           if (h == NULL && local_got_offsets)
2693             tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2694           else if (h != NULL)
2695             {
2696               tls_type = elf_s390_hash_entry(h)->tls_type;
2697               if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2698                 r_type = R_390_TLS_LE64;
2699             }
2700           if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2701             r_type = R_390_TLS_IE64;
2702
2703           if (r_type == R_390_TLS_LE64)
2704             {
2705               /* This relocation gets optimized away by the local exec
2706                  access optimization.  */
2707               BFD_ASSERT (! unresolved_reloc);
2708               bfd_put_64 (output_bfd, -tpoff (info, relocation),
2709                           contents + rel->r_offset);
2710               continue;
2711             }
2712
2713           if (htab->sgot == NULL)
2714             abort ();
2715
2716           if (h != NULL)
2717             off = h->got.offset;
2718           else
2719             {
2720               if (local_got_offsets == NULL)
2721                 abort ();
2722
2723               off = local_got_offsets[r_symndx];
2724             }
2725
2726         emit_tls_relocs:
2727
2728           if ((off & 1) != 0)
2729             off &= ~1;
2730           else
2731             {
2732               Elf_Internal_Rela outrel;
2733               bfd_byte *loc;
2734               int dr_type, indx;
2735
2736               if (htab->srelgot == NULL)
2737                 abort ();
2738
2739               outrel.r_offset = (htab->sgot->output_section->vma
2740                                  + htab->sgot->output_offset + off);
2741
2742               indx = h && h->dynindx != -1 ? h->dynindx : 0;
2743               if (r_type == R_390_TLS_GD64)
2744                 dr_type = R_390_TLS_DTPMOD;
2745               else
2746                 dr_type = R_390_TLS_TPOFF;
2747               if (dr_type == R_390_TLS_TPOFF && indx == 0)
2748                 outrel.r_addend = relocation - dtpoff_base (info);
2749               else
2750                 outrel.r_addend = 0;
2751               outrel.r_info = ELF64_R_INFO (indx, dr_type);
2752               loc = htab->srelgot->contents;
2753               loc += htab->srelgot->reloc_count++
2754                 * sizeof (Elf64_External_Rela);
2755               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2756
2757               if (r_type == R_390_TLS_GD64)
2758                 {
2759                   if (indx == 0)
2760                     {
2761                       BFD_ASSERT (! unresolved_reloc);
2762                       bfd_put_64 (output_bfd,
2763                                   relocation - dtpoff_base (info),
2764                                   htab->sgot->contents + off + GOT_ENTRY_SIZE);
2765                     }
2766                   else
2767                     {
2768                       outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2769                       outrel.r_offset += GOT_ENTRY_SIZE;
2770                       outrel.r_addend = 0;
2771                       htab->srelgot->reloc_count++;
2772                       loc += sizeof (Elf64_External_Rela);
2773                       bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2774                     }
2775                 }
2776
2777               if (h != NULL)
2778                 h->got.offset |= 1;
2779               else
2780                 local_got_offsets[r_symndx] |= 1;
2781             }
2782
2783           if (off >= (bfd_vma) -2)
2784             abort ();
2785           if (r_type == ELF64_R_TYPE (rel->r_info))
2786             {
2787               relocation = htab->sgot->output_offset + off;
2788               if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2789                 relocation += htab->sgot->output_section->vma;
2790               unresolved_reloc = FALSE;
2791             }
2792           else
2793             {
2794               bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2795                           contents + rel->r_offset);
2796               continue;
2797             }
2798           break;
2799
2800         case R_390_TLS_GOTIE12:
2801         case R_390_TLS_GOTIE20:
2802         case R_390_TLS_IEENT:
2803           if (h == NULL)
2804             {
2805               if (local_got_offsets == NULL)
2806                 abort();
2807               off = local_got_offsets[r_symndx];
2808               if (info->shared)
2809                 goto emit_tls_relocs;
2810             }
2811           else
2812             {
2813               off = h->got.offset;
2814               tls_type = elf_s390_hash_entry(h)->tls_type;
2815               if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2816                 goto emit_tls_relocs;
2817             }
2818
2819           if (htab->sgot == NULL)
2820             abort ();
2821
2822           BFD_ASSERT (! unresolved_reloc);
2823           bfd_put_64 (output_bfd, -tpoff (info, relocation),
2824                       htab->sgot->contents + off);
2825           relocation = htab->sgot->output_offset + off;
2826           if (r_type == R_390_TLS_IEENT)
2827             relocation += htab->sgot->output_section->vma;
2828           unresolved_reloc = FALSE;
2829           break;
2830
2831         case R_390_TLS_LDM64:
2832           if (! info->shared)
2833             /* The literal pool entry this relocation refers to gets ignored
2834                by the optimized code of the local exec model. Do nothing
2835                and the value will turn out zero.  */
2836             continue;
2837
2838           if (htab->sgot == NULL)
2839             abort ();
2840
2841           off = htab->tls_ldm_got.offset;
2842           if (off & 1)
2843             off &= ~1;
2844           else
2845             {
2846               Elf_Internal_Rela outrel;
2847               bfd_byte *loc;
2848
2849               if (htab->srelgot == NULL)
2850                 abort ();
2851
2852               outrel.r_offset = (htab->sgot->output_section->vma
2853                                  + htab->sgot->output_offset + off);
2854
2855               bfd_put_64 (output_bfd, 0,
2856                           htab->sgot->contents + off + GOT_ENTRY_SIZE);
2857               outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2858               outrel.r_addend = 0;
2859               loc = htab->srelgot->contents;
2860               loc += htab->srelgot->reloc_count++
2861                 * sizeof (Elf64_External_Rela);
2862               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2863               htab->tls_ldm_got.offset |= 1;
2864             }
2865           relocation = htab->sgot->output_offset + off;
2866           unresolved_reloc = FALSE;
2867           break;
2868
2869         case R_390_TLS_LE64:
2870           if (info->shared)
2871             {
2872               /* Linking a shared library with non-fpic code requires
2873                  a R_390_TLS_TPOFF relocation.  */
2874               Elf_Internal_Rela outrel;
2875               asection *sreloc;
2876               bfd_byte *loc;
2877               int indx;
2878
2879               outrel.r_offset = rel->r_offset
2880                                 + input_section->output_section->vma
2881                                 + input_section->output_offset;
2882               if (h != NULL && h->dynindx != -1)
2883                 indx = h->dynindx;
2884               else
2885                 indx = 0;
2886               outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2887               if (indx == 0)
2888                 outrel.r_addend = relocation - dtpoff_base (info);
2889               else
2890                 outrel.r_addend = 0;
2891               sreloc = elf_section_data (input_section)->sreloc;
2892               if (sreloc == NULL)
2893                 abort ();
2894               loc = sreloc->contents;
2895               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2896               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2897             }
2898           else
2899             {
2900               BFD_ASSERT (! unresolved_reloc);
2901               bfd_put_64 (output_bfd, -tpoff (info, relocation),
2902                           contents + rel->r_offset);
2903             }
2904           continue;
2905
2906         case R_390_TLS_LDO64:
2907           if (info->shared)
2908             relocation -= dtpoff_base (info);
2909           else
2910             /* When converting LDO to LE, we must negate.  */
2911             relocation = -tpoff (info, relocation);
2912           break;
2913
2914           /* Relocations for tls instructions.  */
2915         case R_390_TLS_LOAD:
2916         case R_390_TLS_GDCALL:
2917         case R_390_TLS_LDCALL:
2918           tls_type = GOT_UNKNOWN;
2919           if (h == NULL && local_got_offsets)
2920             tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2921           else if (h != NULL)
2922             tls_type = elf_s390_hash_entry(h)->tls_type;
2923
2924           if (tls_type == GOT_TLS_GD)
2925             continue;
2926
2927           if (r_type == R_390_TLS_LOAD)
2928             {
2929               if (!info->shared && (h == NULL || h->dynindx == -1))
2930                 {
2931                   /* IE->LE transition. Four valid cases:
2932                      lg %rx,(0,%ry)    -> sllg %rx,%ry,0
2933                      lg %rx,(%ry,0)    -> sllg %rx,%ry,0
2934                      lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2935                      lg %rx,(%r12,%ry) -> sllg %rx,%ry,0  */
2936                   unsigned int insn0, insn1, ry;
2937
2938                   insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2939                   insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2940                   if (insn1 != 0x0004)
2941                     invalid_tls_insn (input_bfd, input_section, rel);
2942                   ry = 0;
2943                   if ((insn0 & 0xff00f000) == 0xe3000000)
2944                     /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0  */
2945                     ry = (insn0 & 0x000f0000);
2946                   else if ((insn0 & 0xff0f0000) == 0xe3000000)
2947                     /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0  */
2948                     ry = (insn0 & 0x0000f000) << 4;
2949                   else if ((insn0 & 0xff00f000) == 0xe300c000)
2950                     /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0  */
2951                     ry = (insn0 & 0x000f0000);
2952                   else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2953                     /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0  */
2954                     ry = (insn0 & 0x0000f000) << 4;
2955                   else
2956                     invalid_tls_insn (input_bfd, input_section, rel);
2957                   insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2958                   insn1 = 0x000d;
2959                   bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2960                   bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2961                 }
2962             }
2963           else if (r_type == R_390_TLS_GDCALL)
2964             {
2965               unsigned int insn0, insn1;
2966
2967               insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2968               insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2969               if ((insn0 & 0xffff0000) != 0xc0e50000)
2970                 invalid_tls_insn (input_bfd, input_section, rel);
2971               if (!info->shared && (h == NULL || h->dynindx == -1))
2972                 {
2973                   /* GD->LE transition.
2974                      brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2975                   insn0 = 0xc0040000;
2976                   insn1 = 0x0000;
2977                 }
2978               else
2979                 {
2980                   /* GD->IE transition.
2981                      brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12)  */
2982                   insn0 = 0xe322c000;
2983                   insn1 = 0x0004;
2984                 }
2985               bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2986               bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2987             }
2988           else if (r_type == R_390_TLS_LDCALL)
2989             {
2990               if (!info->shared)
2991                 {
2992                   unsigned int insn0, insn1;
2993
2994                   insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2995                   insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2996                   if ((insn0 & 0xffff0000) != 0xc0e50000)
2997                     invalid_tls_insn (input_bfd, input_section, rel);
2998                   /* LD->LE transition.
2999                      brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3000                   insn0 = 0xc0040000;
3001                   insn1 = 0x0000;
3002                   bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3003                   bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3004                 }
3005             }
3006           continue;
3007
3008         default:
3009           break;
3010         }
3011
3012       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3013          because such sections are not SEC_ALLOC and thus ld.so will
3014          not process them.  */
3015       if (unresolved_reloc
3016           && !((input_section->flags & SEC_DEBUGGING) != 0
3017                && h->def_dynamic))
3018         (*_bfd_error_handler)
3019           (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3020            input_bfd,
3021            input_section,
3022            (long) rel->r_offset,
3023            howto->name,
3024            h->root.root.string);
3025
3026       if (r_type == R_390_20
3027           || r_type == R_390_GOT20
3028           || r_type == R_390_GOTPLT20
3029           || r_type == R_390_TLS_GOTIE20)
3030         {
3031           relocation += rel->r_addend;
3032           relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3033           r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3034                                         contents, rel->r_offset,
3035                                         relocation, 0);
3036         }
3037       else
3038         r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3039                                       contents, rel->r_offset,
3040                                       relocation, rel->r_addend);
3041
3042       if (r != bfd_reloc_ok)
3043         {
3044           const char *name;
3045
3046           if (h != NULL)
3047             name = h->root.root.string;
3048           else
3049             {
3050               name = bfd_elf_string_from_elf_section (input_bfd,
3051                                                       symtab_hdr->sh_link,
3052                                                       sym->st_name);
3053               if (name == NULL)
3054                 return FALSE;
3055               if (*name == '\0')
3056                 name = bfd_section_name (input_bfd, sec);
3057             }
3058
3059           if (r == bfd_reloc_overflow)
3060             {
3061
3062               if (! ((*info->callbacks->reloc_overflow)
3063                      (info, (h ? &h->root : NULL), name, howto->name,
3064                       (bfd_vma) 0, input_bfd, input_section,
3065                       rel->r_offset)))
3066                 return FALSE;
3067             }
3068           else
3069             {
3070               (*_bfd_error_handler)
3071                 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3072                  input_bfd, input_section,
3073                  (long) rel->r_offset, name, (int) r);
3074               return FALSE;
3075             }
3076         }
3077     }
3078
3079   return TRUE;
3080 }
3081
3082 /* Finish up dynamic symbol handling.  We set the contents of various
3083    dynamic sections here.  */
3084
3085 static bfd_boolean
3086 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3087      bfd *output_bfd;
3088      struct bfd_link_info *info;
3089      struct elf_link_hash_entry *h;
3090      Elf_Internal_Sym *sym;
3091 {
3092   struct elf_s390_link_hash_table *htab;
3093
3094   htab = elf_s390_hash_table (info);
3095
3096   if (h->plt.offset != (bfd_vma) -1)
3097     {
3098       bfd_vma plt_index;
3099       bfd_vma got_offset;
3100       Elf_Internal_Rela rela;
3101       bfd_byte *loc;
3102
3103       /* This symbol has an entry in the procedure linkage table.  Set
3104          it up.  */
3105
3106       if (h->dynindx == -1
3107           || htab->splt == NULL
3108           || htab->sgotplt == NULL
3109           || htab->srelplt == NULL)
3110         abort ();
3111
3112       /* Calc. index no.
3113          Current offset - size first entry / entry size.  */
3114       plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3115
3116       /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3117          addr & GOT addr.  */
3118       got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3119
3120       /* Fill in the blueprint of a PLT.  */
3121       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3122                   htab->splt->contents + h->plt.offset);
3123       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3124                   htab->splt->contents + h->plt.offset + 4);
3125       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3126                   htab->splt->contents + h->plt.offset + 8);
3127       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3128                   htab->splt->contents + h->plt.offset + 12);
3129       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3130                   htab->splt->contents + h->plt.offset + 16);
3131       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3132                   htab->splt->contents + h->plt.offset + 20);
3133       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3134                   htab->splt->contents + h->plt.offset + 24);
3135       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3136                   htab->splt->contents + h->plt.offset + 28);
3137       /* Fixup the relative address to the GOT entry */
3138       bfd_put_32 (output_bfd,
3139                   (htab->sgotplt->output_section->vma +
3140                    htab->sgotplt->output_offset + got_offset
3141                    - (htab->splt->output_section->vma + h->plt.offset))/2,
3142                   htab->splt->contents + h->plt.offset + 2);
3143       /* Fixup the relative branch to PLT 0 */
3144       bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3145                                  (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3146                   htab->splt->contents + h->plt.offset + 24);
3147       /* Fixup offset into symbol table */
3148       bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3149                   htab->splt->contents + h->plt.offset + 28);
3150
3151       /* Fill in the entry in the global offset table.
3152          Points to instruction after GOT offset.  */
3153       bfd_put_64 (output_bfd,
3154                   (htab->splt->output_section->vma
3155                    + htab->splt->output_offset
3156                    + h->plt.offset
3157                    + 14),
3158                   htab->sgotplt->contents + got_offset);
3159
3160       /* Fill in the entry in the .rela.plt section.  */
3161       rela.r_offset = (htab->sgotplt->output_section->vma
3162                        + htab->sgotplt->output_offset
3163                        + got_offset);
3164       rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3165       rela.r_addend = 0;
3166       loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3167       bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3168
3169       if (!h->def_regular)
3170         {
3171           /* Mark the symbol as undefined, rather than as defined in
3172              the .plt section.  Leave the value alone.  This is a clue
3173              for the dynamic linker, to make function pointer
3174              comparisons work between an application and shared
3175              library.  */
3176           sym->st_shndx = SHN_UNDEF;
3177         }
3178     }
3179
3180   if (h->got.offset != (bfd_vma) -1
3181       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3182       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3183       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3184     {
3185       Elf_Internal_Rela rela;
3186       bfd_byte *loc;
3187
3188       /* This symbol has an entry in the global offset table.  Set it
3189          up.  */
3190       if (htab->sgot == NULL || htab->srelgot == NULL)
3191         abort ();
3192
3193       rela.r_offset = (htab->sgot->output_section->vma
3194                        + htab->sgot->output_offset
3195                        + (h->got.offset &~ (bfd_vma) 1));
3196
3197       /* If this is a static link, or it is a -Bsymbolic link and the
3198          symbol is defined locally or was forced to be local because
3199          of a version file, we just want to emit a RELATIVE reloc.
3200          The entry in the global offset table will already have been
3201          initialized in the relocate_section function.  */
3202       if (info->shared
3203           && (info->symbolic
3204               || h->dynindx == -1
3205               || h->forced_local)
3206           && h->def_regular)
3207         {
3208           BFD_ASSERT((h->got.offset & 1) != 0);
3209           rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3210           rela.r_addend = (h->root.u.def.value
3211                            + h->root.u.def.section->output_section->vma
3212                            + h->root.u.def.section->output_offset);
3213         }
3214       else
3215         {
3216           BFD_ASSERT((h->got.offset & 1) == 0);
3217           bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3218           rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3219           rela.r_addend = 0;
3220         }
3221
3222       loc = htab->srelgot->contents;
3223       loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3224       bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3225     }
3226
3227   if (h->needs_copy)
3228     {
3229       Elf_Internal_Rela rela;
3230       bfd_byte *loc;
3231
3232       /* This symbols needs a copy reloc.  Set it up.  */
3233
3234       if (h->dynindx == -1
3235           || (h->root.type != bfd_link_hash_defined
3236               && h->root.type != bfd_link_hash_defweak)
3237           || htab->srelbss == NULL)
3238         abort ();
3239
3240       rela.r_offset = (h->root.u.def.value
3241                        + h->root.u.def.section->output_section->vma
3242                        + h->root.u.def.section->output_offset);
3243       rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3244       rela.r_addend = 0;
3245       loc = htab->srelbss->contents;
3246       loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3247       bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3248     }
3249
3250   /* Mark some specially defined symbols as absolute.  */
3251   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3252       || h == htab->elf.hgot
3253       || h == htab->elf.hplt)
3254     sym->st_shndx = SHN_ABS;
3255
3256   return TRUE;
3257 }
3258
3259 /* Used to decide how to sort relocs in an optimal manner for the
3260    dynamic linker, before writing them out.  */
3261
3262 static enum elf_reloc_type_class
3263 elf_s390_reloc_type_class (rela)
3264      const Elf_Internal_Rela *rela;
3265 {
3266   switch ((int) ELF64_R_TYPE (rela->r_info))
3267     {
3268     case R_390_RELATIVE:
3269       return reloc_class_relative;
3270     case R_390_JMP_SLOT:
3271       return reloc_class_plt;
3272     case R_390_COPY:
3273       return reloc_class_copy;
3274     default:
3275       return reloc_class_normal;
3276     }
3277 }
3278
3279 /* Finish up the dynamic sections.  */
3280
3281 static bfd_boolean
3282 elf_s390_finish_dynamic_sections (output_bfd, info)
3283      bfd *output_bfd;
3284      struct bfd_link_info *info;
3285 {
3286   struct elf_s390_link_hash_table *htab;
3287   bfd *dynobj;
3288   asection *sdyn;
3289
3290   htab = elf_s390_hash_table (info);
3291   dynobj = htab->elf.dynobj;
3292   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3293
3294   if (htab->elf.dynamic_sections_created)
3295     {
3296       Elf64_External_Dyn *dyncon, *dynconend;
3297
3298       if (sdyn == NULL || htab->sgot == NULL)
3299         abort ();
3300
3301       dyncon = (Elf64_External_Dyn *) sdyn->contents;
3302       dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3303       for (; dyncon < dynconend; dyncon++)
3304         {
3305           Elf_Internal_Dyn dyn;
3306           asection *s;
3307
3308           bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3309
3310           switch (dyn.d_tag)
3311             {
3312             default:
3313               continue;
3314
3315             case DT_PLTGOT:
3316               dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3317               break;
3318
3319             case DT_JMPREL:
3320               dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3321               break;
3322
3323             case DT_PLTRELSZ:
3324               s = htab->srelplt->output_section;
3325               dyn.d_un.d_val = s->size;
3326               break;
3327
3328             case DT_RELASZ:
3329               /* The procedure linkage table relocs (DT_JMPREL) should
3330                  not be included in the overall relocs (DT_RELA).
3331                  Therefore, we override the DT_RELASZ entry here to
3332                  make it not include the JMPREL relocs.  Since the
3333                  linker script arranges for .rela.plt to follow all
3334                  other relocation sections, we don't have to worry
3335                  about changing the DT_RELA entry.  */
3336               s = htab->srelplt->output_section;
3337               dyn.d_un.d_val -= s->size;
3338               break;
3339             }
3340
3341           bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3342         }
3343
3344       /* Fill in the special first entry in the procedure linkage table.  */
3345       if (htab->splt && htab->splt->size > 0)
3346         {
3347           /* fill in blueprint for plt 0 entry */
3348           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3349                       htab->splt->contents );
3350           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3351                       htab->splt->contents +4 );
3352           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3353                       htab->splt->contents +12 );
3354           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3355                       htab->splt->contents +16 );
3356           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3357                       htab->splt->contents +20 );
3358           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3359                       htab->splt->contents + 24);
3360           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3361                       htab->splt->contents + 28 );
3362           /* Fixup relative address to start of GOT */
3363           bfd_put_32 (output_bfd,
3364                       (htab->sgotplt->output_section->vma +
3365                        htab->sgotplt->output_offset
3366                        - htab->splt->output_section->vma - 6)/2,
3367                       htab->splt->contents + 8);
3368         }
3369       elf_section_data (htab->splt->output_section)
3370         ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3371     }
3372
3373   if (htab->sgotplt)
3374     {
3375       /* Fill in the first three entries in the global offset table.  */
3376       if (htab->sgotplt->size > 0)
3377         {
3378           bfd_put_64 (output_bfd,
3379                       (sdyn == NULL ? (bfd_vma) 0
3380                        : sdyn->output_section->vma + sdyn->output_offset),
3381                       htab->sgotplt->contents);
3382           /* One entry for shared object struct ptr.  */
3383           bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3384           /* One entry for _dl_runtime_resolve.  */
3385           bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3386         }
3387
3388       elf_section_data (htab->sgot->output_section)
3389         ->this_hdr.sh_entsize = 8;
3390     }
3391   return TRUE;
3392 }
3393
3394 /* Return address for Ith PLT stub in section PLT, for relocation REL
3395    or (bfd_vma) -1 if it should not be included.  */
3396
3397 static bfd_vma
3398 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3399                       const arelent *rel ATTRIBUTE_UNUSED)
3400 {
3401   return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3402 }
3403
3404
3405 /* Why was the hash table entry size definition changed from
3406    ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3407    this is the only reason for the s390_elf64_size_info structure.  */
3408
3409 const struct elf_size_info s390_elf64_size_info =
3410 {
3411   sizeof (Elf64_External_Ehdr),
3412   sizeof (Elf64_External_Phdr),
3413   sizeof (Elf64_External_Shdr),
3414   sizeof (Elf64_External_Rel),
3415   sizeof (Elf64_External_Rela),
3416   sizeof (Elf64_External_Sym),
3417   sizeof (Elf64_External_Dyn),
3418   sizeof (Elf_External_Note),
3419   8,            /* hash-table entry size.  */
3420   1,            /* internal relocations per external relocations.  */
3421   64,           /* arch_size.  */
3422   3,            /* log_file_align.  */
3423   ELFCLASS64, EV_CURRENT,
3424   bfd_elf64_write_out_phdrs,
3425   bfd_elf64_write_shdrs_and_ehdr,
3426   bfd_elf64_checksum_contents,
3427   bfd_elf64_write_relocs,
3428   bfd_elf64_swap_symbol_in,
3429   bfd_elf64_swap_symbol_out,
3430   bfd_elf64_slurp_reloc_table,
3431   bfd_elf64_slurp_symbol_table,
3432   bfd_elf64_swap_dyn_in,
3433   bfd_elf64_swap_dyn_out,
3434   bfd_elf64_swap_reloc_in,
3435   bfd_elf64_swap_reloc_out,
3436   bfd_elf64_swap_reloca_in,
3437   bfd_elf64_swap_reloca_out
3438 };
3439
3440 #define TARGET_BIG_SYM  bfd_elf64_s390_vec
3441 #define TARGET_BIG_NAME "elf64-s390"
3442 #define ELF_ARCH        bfd_arch_s390
3443 #define ELF_MACHINE_CODE EM_S390
3444 #define ELF_MACHINE_ALT1 EM_S390_OLD
3445 #define ELF_MAXPAGESIZE 0x1000
3446
3447 #define elf_backend_size_info           s390_elf64_size_info
3448
3449 #define elf_backend_can_gc_sections     1
3450 #define elf_backend_can_refcount        1
3451 #define elf_backend_want_got_plt        1
3452 #define elf_backend_plt_readonly        1
3453 #define elf_backend_want_plt_sym        0
3454 #define elf_backend_got_header_size     24
3455 #define elf_backend_rela_normal         1
3456
3457 #define elf_info_to_howto               elf_s390_info_to_howto
3458
3459 #define bfd_elf64_bfd_is_local_label_name     elf_s390_is_local_label_name
3460 #define bfd_elf64_bfd_link_hash_table_create  elf_s390_link_hash_table_create
3461 #define bfd_elf64_bfd_reloc_type_lookup       elf_s390_reloc_type_lookup
3462 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3463
3464 #define elf_backend_adjust_dynamic_symbol     elf_s390_adjust_dynamic_symbol
3465 #define elf_backend_check_relocs              elf_s390_check_relocs
3466 #define elf_backend_copy_indirect_symbol      elf_s390_copy_indirect_symbol
3467 #define elf_backend_create_dynamic_sections   elf_s390_create_dynamic_sections
3468 #define elf_backend_finish_dynamic_sections   elf_s390_finish_dynamic_sections
3469 #define elf_backend_finish_dynamic_symbol     elf_s390_finish_dynamic_symbol
3470 #define elf_backend_gc_mark_hook              elf_s390_gc_mark_hook
3471 #define elf_backend_gc_sweep_hook             elf_s390_gc_sweep_hook
3472 #define elf_backend_reloc_type_class          elf_s390_reloc_type_class
3473 #define elf_backend_relocate_section          elf_s390_relocate_section
3474 #define elf_backend_size_dynamic_sections     elf_s390_size_dynamic_sections
3475 #define elf_backend_init_index_section        _bfd_elf_init_1_index_section
3476 #define elf_backend_reloc_type_class          elf_s390_reloc_type_class
3477 #define elf_backend_plt_sym_val               elf_s390_plt_sym_val
3478
3479 #define bfd_elf64_mkobject              elf_s390_mkobject
3480 #define elf_backend_object_p            elf_s390_object_p
3481
3482 #include "elf64-target.h"