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, 2009,
   3    2010  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_DATA)
 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_DATA);
 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 cache.  */
 689   struct sym_cache sym_cache;
 690 };
 691
 692 /* Get the s390 ELF linker hash table from a link_info structure.  */
 693
 694 #define elf_s390_hash_table(p) \
 695   (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
 696   == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
 697
 698 /* Create an entry in an s390 ELF linker hash table.  */
 699
 700 static struct bfd_hash_entry *
 701 link_hash_newfunc (entry, table, string)
 702      struct bfd_hash_entry *entry;
 703      struct bfd_hash_table *table;
 704      const char *string;
 705 {
 706   /* Allocate the structure if it has not already been allocated by a
 707      subclass.  */
 708   if (entry == NULL)
 709     {
 710       entry = bfd_hash_allocate (table,
 711                                  sizeof (struct elf_s390_link_hash_entry));
 712       if (entry == NULL)
 713         return entry;
 714     }
 715
 716   /* Call the allocation method of the superclass.  */
 717   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 718   if (entry != NULL)
 719     {
 720       struct elf_s390_link_hash_entry *eh;
 721
 722       eh = (struct elf_s390_link_hash_entry *) entry;
 723       eh->dyn_relocs = NULL;
 724       eh->gotplt_refcount = 0;
 725       eh->tls_type = GOT_UNKNOWN;
 726     }
 727
 728   return entry;
 729 }
 730
 731 /* Create an s390 ELF linker hash table.  */
 732
 733 static struct bfd_link_hash_table *
 734 elf_s390_link_hash_table_create (abfd)
 735      bfd *abfd;
 736 {
 737   struct elf_s390_link_hash_table *ret;
 738   bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
 739
 740   ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
 741   if (ret == NULL)
 742     return NULL;
 743
 744   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
 745                                       sizeof (struct elf_s390_link_hash_entry),
 746                                       S390_ELF_DATA))
 747     {
 748       free (ret);
 749       return NULL;
 750     }
 751
 752   ret->sgot = NULL;
 753   ret->sgotplt = NULL;
 754   ret->srelgot = NULL;
 755   ret->splt = NULL;
 756   ret->srelplt = NULL;
 757   ret->sdynbss = NULL;
 758   ret->srelbss = NULL;
 759   ret->tls_ldm_got.refcount = 0;
 760   ret->sym_cache.abfd = NULL;
 761
 762   return &ret->elf.root;
 763 }
 764
 765 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
 766    shortcuts to them in our hash table.  */
 767
 768 static bfd_boolean
 769 create_got_section (bfd *dynobj,
 770                     struct bfd_link_info *info)
 771 {
 772   struct elf_s390_link_hash_table *htab;
 773
 774   if (! _bfd_elf_create_got_section (dynobj, info))
 775     return FALSE;
 776
 777   htab = elf_s390_hash_table (info);
 778   if (htab == NULL)
 779     return FALSE;
 780
 781   htab->sgot = bfd_get_section_by_name (dynobj, ".got");
 782   htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
 783   htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
 784   if (!htab->sgot || !htab->sgotplt || !htab->srelgot)
 785     abort ();
 786   return TRUE;
 787 }
 788
 789 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
 790    .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
 791    hash table.  */
 792
 793 static bfd_boolean
 794 elf_s390_create_dynamic_sections (bfd *dynobj,
 795                                   struct bfd_link_info *info)
 796 {
 797   struct elf_s390_link_hash_table *htab;
 798
 799   htab = elf_s390_hash_table (info);
 800   if (htab == NULL)
 801     return FALSE;
 802
 803   if (!htab->sgot && !create_got_section (dynobj, info))
 804     return FALSE;
 805
 806   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 807     return FALSE;
 808
 809   htab->splt = bfd_get_section_by_name (dynobj, ".plt");
 810   htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
 811   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 812   if (!info->shared)
 813     htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
 814
 815   if (!htab->splt || !htab->srelplt || !htab->sdynbss
 816       || (!info->shared && !htab->srelbss))
 817     abort ();
 818
 819   return TRUE;
 820 }
 821
 822 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 823
 824 static void
 825 elf_s390_copy_indirect_symbol (info, dir, ind)
 826      struct bfd_link_info *info;
 827      struct elf_link_hash_entry *dir, *ind;
 828 {
 829   struct elf_s390_link_hash_entry *edir, *eind;
 830
 831   edir = (struct elf_s390_link_hash_entry *) dir;
 832   eind = (struct elf_s390_link_hash_entry *) ind;
 833
 834   if (eind->dyn_relocs != NULL)
 835     {
 836       if (edir->dyn_relocs != NULL)
 837         {
 838           struct elf_s390_dyn_relocs **pp;
 839           struct elf_s390_dyn_relocs *p;
 840
 841           /* Add reloc counts against the indirect sym to the direct sym
 842              list.  Merge any entries against the same section.  */
 843           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 844             {
 845               struct elf_s390_dyn_relocs *q;
 846
 847               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 848                 if (q->sec == p->sec)
 849                   {
 850                     q->pc_count += p->pc_count;
 851                     q->count += p->count;
 852                     *pp = p->next;
 853                     break;
 854                   }
 855               if (q == NULL)
 856                 pp = &p->next;
 857             }
 858           *pp = edir->dyn_relocs;
 859         }
 860
 861       edir->dyn_relocs = eind->dyn_relocs;
 862       eind->dyn_relocs = NULL;
 863     }
 864
 865   if (ind->root.type == bfd_link_hash_indirect
 866       && dir->got.refcount <= 0)
 867     {
 868       edir->tls_type = eind->tls_type;
 869       eind->tls_type = GOT_UNKNOWN;
 870     }
 871
 872   if (ELIMINATE_COPY_RELOCS
 873       && ind->root.type != bfd_link_hash_indirect
 874       && dir->dynamic_adjusted)
 875     {
 876       /* If called to transfer flags for a weakdef during processing
 877          of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 878          We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 879       dir->ref_dynamic |= ind->ref_dynamic;
 880       dir->ref_regular |= ind->ref_regular;
 881       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
 882       dir->needs_plt |= ind->needs_plt;
 883     }
 884   else
 885     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 886 }
 887
 888 static int
 889 elf_s390_tls_transition (info, r_type, is_local)
 890      struct bfd_link_info *info;
 891      int r_type;
 892      int is_local;
 893 {
 894   if (info->shared)
 895     return r_type;
 896
 897   switch (r_type)
 898     {
 899     case R_390_TLS_GD64:
 900     case R_390_TLS_IE64:
 901       if (is_local)
 902         return R_390_TLS_LE64;
 903       return R_390_TLS_IE64;
 904     case R_390_TLS_GOTIE64:
 905       if (is_local)
 906         return R_390_TLS_LE64;
 907       return R_390_TLS_GOTIE64;
 908     case R_390_TLS_LDM64:
 909       return R_390_TLS_LE64;
 910     }
 911
 912   return r_type;
 913 }
 914
 915 /* Look through the relocs for a section during the first phase, and
 916    allocate space in the global offset table or procedure linkage
 917    table.  */
 918
 919 static bfd_boolean
 920 elf_s390_check_relocs (bfd *abfd,
 921                        struct bfd_link_info *info,
 922                        asection *sec,
 923                        const Elf_Internal_Rela *relocs)
 924 {
 925   struct elf_s390_link_hash_table *htab;
 926   Elf_Internal_Shdr *symtab_hdr;
 927   struct elf_link_hash_entry **sym_hashes;
 928   const Elf_Internal_Rela *rel;
 929   const Elf_Internal_Rela *rel_end;
 930   asection *sreloc;
 931   bfd_signed_vma *local_got_refcounts;
 932   int tls_type, old_tls_type;
 933
 934   if (info->relocatable)
 935     return TRUE;
 936
 937   BFD_ASSERT (is_s390_elf (abfd));
 938
 939   htab = elf_s390_hash_table (info);
 940   if (htab == NULL)
 941     return FALSE;
 942
 943   symtab_hdr = &elf_symtab_hdr (abfd);
 944   sym_hashes = elf_sym_hashes (abfd);
 945   local_got_refcounts = elf_local_got_refcounts (abfd);
 946
 947   sreloc = NULL;
 948
 949   rel_end = relocs + sec->reloc_count;
 950   for (rel = relocs; rel < rel_end; rel++)
 951     {
 952       unsigned int r_type;
 953       unsigned long r_symndx;
 954       struct elf_link_hash_entry *h;
 955
 956       r_symndx = ELF64_R_SYM (rel->r_info);
 957
 958       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
 959         {
 960           (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
 961                                  abfd,
 962                                  r_symndx);
 963           return FALSE;
 964         }
 965
 966       if (r_symndx < symtab_hdr->sh_info)
 967         h = NULL;
 968       else
 969         {
 970           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
 971           while (h->root.type == bfd_link_hash_indirect
 972                  || h->root.type == bfd_link_hash_warning)
 973             h = (struct elf_link_hash_entry *) h->root.u.i.link;
 974         }
 975
 976       /* Create got section and local_got_refcounts array if they
 977          are needed.  */
 978       r_type = elf_s390_tls_transition (info,
 979                                         ELF64_R_TYPE (rel->r_info),
 980                                         h == NULL);
 981       switch (r_type)
 982         {
 983         case R_390_GOT12:
 984         case R_390_GOT16:
 985         case R_390_GOT20:
 986         case R_390_GOT32:
 987         case R_390_GOT64:
 988         case R_390_GOTENT:
 989         case R_390_GOTPLT12:
 990         case R_390_GOTPLT16:
 991         case R_390_GOTPLT20:
 992         case R_390_GOTPLT32:
 993         case R_390_GOTPLT64:
 994         case R_390_GOTPLTENT:
 995         case R_390_TLS_GD64:
 996         case R_390_TLS_GOTIE12:
 997         case R_390_TLS_GOTIE20:
 998         case R_390_TLS_GOTIE64:
 999         case R_390_TLS_IEENT:
1000         case R_390_TLS_IE64:
1001         case R_390_TLS_LDM64:
1002           if (h == NULL
1003               && local_got_refcounts == NULL)
1004             {
1005               bfd_size_type size;
1006
1007               size = symtab_hdr->sh_info;
1008               size *= (sizeof (bfd_signed_vma) + sizeof(char));
1009               local_got_refcounts = ((bfd_signed_vma *)
1010                                      bfd_zalloc (abfd, size));
1011               if (local_got_refcounts == NULL)
1012                 return FALSE;
1013               elf_local_got_refcounts (abfd) = local_got_refcounts;
1014               elf_s390_local_got_tls_type (abfd)
1015                 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1016             }
1017           /* Fall through.  */
1018         case R_390_GOTOFF16:
1019         case R_390_GOTOFF32:
1020         case R_390_GOTOFF64:
1021         case R_390_GOTPC:
1022         case R_390_GOTPCDBL:
1023           if (htab->sgot == NULL)
1024             {
1025               if (htab->elf.dynobj == NULL)
1026                 htab->elf.dynobj = abfd;
1027               if (!create_got_section (htab->elf.dynobj, info))
1028                 return FALSE;
1029             }
1030         }
1031
1032       switch (r_type)
1033         {
1034         case R_390_GOTOFF16:
1035         case R_390_GOTOFF32:
1036         case R_390_GOTOFF64:
1037         case R_390_GOTPC:
1038         case R_390_GOTPCDBL:
1039           /* Got is created, nothing to be done.  */
1040           break;
1041
1042         case R_390_PLT16DBL:
1043         case R_390_PLT32:
1044         case R_390_PLT32DBL:
1045         case R_390_PLT64:
1046         case R_390_PLTOFF16:
1047         case R_390_PLTOFF32:
1048         case R_390_PLTOFF64:
1049           /* This symbol requires a procedure linkage table entry.  We
1050              actually build the entry in adjust_dynamic_symbol,
1051              because this might be a case of linking PIC code which is
1052              never referenced by a dynamic object, in which case we
1053              don't need to generate a procedure linkage table entry
1054              after all.  */
1055
1056           /* If this is a local symbol, we resolve it directly without
1057              creating a procedure linkage table entry.  */
1058           if (h != NULL)
1059             {
1060               h->needs_plt = 1;
1061               h->plt.refcount += 1;
1062             }
1063           break;
1064
1065         case R_390_GOTPLT12:
1066         case R_390_GOTPLT16:
1067         case R_390_GOTPLT20:
1068         case R_390_GOTPLT32:
1069         case R_390_GOTPLT64:
1070         case R_390_GOTPLTENT:
1071           /* This symbol requires either a procedure linkage table entry
1072              or an entry in the local got. We actually build the entry
1073              in adjust_dynamic_symbol because whether this is really a
1074              global reference can change and with it the fact if we have
1075              to create a plt entry or a local got entry. To be able to
1076              make a once global symbol a local one we have to keep track
1077              of the number of gotplt references that exist for this
1078              symbol.  */
1079           if (h != NULL)
1080             {
1081               ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1082               h->needs_plt = 1;
1083               h->plt.refcount += 1;
1084             }
1085           else
1086             local_got_refcounts[r_symndx] += 1;
1087           break;
1088
1089         case R_390_TLS_LDM64:
1090           htab->tls_ldm_got.refcount += 1;
1091           break;
1092
1093         case R_390_TLS_IE64:
1094         case R_390_TLS_GOTIE12:
1095         case R_390_TLS_GOTIE20:
1096         case R_390_TLS_GOTIE64:
1097         case R_390_TLS_IEENT:
1098           if (info->shared)
1099             info->flags |= DF_STATIC_TLS;
1100           /* Fall through */
1101
1102         case R_390_GOT12:
1103         case R_390_GOT16:
1104         case R_390_GOT20:
1105         case R_390_GOT32:
1106         case R_390_GOT64:
1107         case R_390_GOTENT:
1108         case R_390_TLS_GD64:
1109           /* This symbol requires a global offset table entry.  */
1110           switch (r_type)
1111             {
1112             default:
1113             case R_390_GOT12:
1114             case R_390_GOT16:
1115             case R_390_GOT20:
1116             case R_390_GOT32:
1117             case R_390_GOTENT:
1118               tls_type = GOT_NORMAL;
1119               break;
1120             case R_390_TLS_GD64:
1121               tls_type = GOT_TLS_GD;
1122               break;
1123             case R_390_TLS_IE64:
1124             case R_390_TLS_GOTIE64:
1125               tls_type = GOT_TLS_IE;
1126               break;
1127             case R_390_TLS_GOTIE12:
1128             case R_390_TLS_GOTIE20:
1129             case R_390_TLS_IEENT:
1130               tls_type = GOT_TLS_IE_NLT;
1131               break;
1132             }
1133
1134           if (h != NULL)
1135             {
1136               h->got.refcount += 1;
1137               old_tls_type = elf_s390_hash_entry(h)->tls_type;
1138             }
1139           else
1140             {
1141               local_got_refcounts[r_symndx] += 1;
1142               old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1143             }
1144           /* If a TLS symbol is accessed using IE at least once,
1145              there is no point to use dynamic model for it.  */
1146           if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1147             {
1148               if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1149                 {
1150                   (*_bfd_error_handler)
1151                     (_("%B: `%s' accessed both as normal and thread local symbol"),
1152                      abfd, h->root.root.string);
1153                   return FALSE;
1154                 }
1155               if (old_tls_type > tls_type)
1156                 tls_type = old_tls_type;
1157             }
1158
1159           if (old_tls_type != tls_type)
1160             {
1161               if (h != NULL)
1162                 elf_s390_hash_entry (h)->tls_type = tls_type;
1163               else
1164                 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1165             }
1166
1167           if (r_type != R_390_TLS_IE64)
1168             break;
1169           /* Fall through */
1170
1171         case R_390_TLS_LE64:
1172           if (!info->shared)
1173             break;
1174           info->flags |= DF_STATIC_TLS;
1175           /* Fall through */
1176
1177         case R_390_8:
1178         case R_390_16:
1179         case R_390_32:
1180         case R_390_64:
1181         case R_390_PC16:
1182         case R_390_PC16DBL:
1183         case R_390_PC32:
1184         case R_390_PC32DBL:
1185         case R_390_PC64:
1186           if (h != NULL && !info->shared)
1187             {
1188               /* If this reloc is in a read-only section, we might
1189                  need a copy reloc.  We can't check reliably at this
1190                  stage whether the section is read-only, as input
1191                  sections have not yet been mapped to output sections.
1192                  Tentatively set the flag for now, and correct in
1193                  adjust_dynamic_symbol.  */
1194               h->non_got_ref = 1;
1195
1196               /* We may need a .plt entry if the function this reloc
1197                  refers to is in a shared lib.  */
1198               h->plt.refcount += 1;
1199             }
1200
1201           /* If we are creating a shared library, and this is a reloc
1202              against a global symbol, or a non PC relative reloc
1203              against a local symbol, then we need to copy the reloc
1204              into the shared library.  However, if we are linking with
1205              -Bsymbolic, we do not need to copy a reloc against a
1206              global symbol which is defined in an object we are
1207              including in the link (i.e., DEF_REGULAR is set).  At
1208              this point we have not seen all the input files, so it is
1209              possible that DEF_REGULAR is not set now but will be set
1210              later (it is never cleared).  In case of a weak definition,
1211              DEF_REGULAR may be cleared later by a strong definition in
1212              a shared library. We account for that possibility below by
1213              storing information in the relocs_copied field of the hash
1214              table entry.  A similar situation occurs when creating
1215              shared libraries and symbol visibility changes render the
1216              symbol local.
1217
1218              If on the other hand, we are creating an executable, we
1219              may need to keep relocations for symbols satisfied by a
1220              dynamic library if we manage to avoid copy relocs for the
1221              symbol.  */
1222           if ((info->shared
1223                && (sec->flags & SEC_ALLOC) != 0
1224                && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1225                     && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1226                     && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1227                     && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1228                     && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1229                    || (h != NULL
1230                        && (! SYMBOLIC_BIND (info, h)
1231                            || h->root.type == bfd_link_hash_defweak
1232                            || !h->def_regular))))
1233               || (ELIMINATE_COPY_RELOCS
1234                   && !info->shared
1235                   && (sec->flags & SEC_ALLOC) != 0
1236                   && h != NULL
1237                   && (h->root.type == bfd_link_hash_defweak
1238                       || !h->def_regular)))
1239             {
1240               struct elf_s390_dyn_relocs *p;
1241               struct elf_s390_dyn_relocs **head;
1242
1243               /* We must copy these reloc types into the output file.
1244                  Create a reloc section in dynobj and make room for
1245                  this reloc.  */
1246               if (sreloc == NULL)
1247                 {
1248                   if (htab->elf.dynobj == NULL)
1249                     htab->elf.dynobj = abfd;
1250
1251                   sreloc = _bfd_elf_make_dynamic_reloc_section
1252                     (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1253
1254                   if (sreloc == NULL)
1255                     return FALSE;
1256                 }
1257
1258               /* If this is a global symbol, we count the number of
1259                  relocations we need for this symbol.  */
1260               if (h != NULL)
1261                 {
1262                   head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1263                 }
1264               else
1265                 {
1266                   /* Track dynamic relocs needed for local syms too.
1267                      We really need local syms available to do this
1268                      easily.  Oh well.  */
1269                   asection *s;
1270                   void *vpp;
1271                   Elf_Internal_Sym *isym;
1272
1273                   isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1274                                                 abfd, r_symndx);
1275                   if (isym == NULL)
1276                     return FALSE;
1277
1278                   s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1279                   if (s == NULL)
1280                     s = sec;
1281
1282                   vpp = &elf_section_data (s)->local_dynrel;
1283                   head = (struct elf_s390_dyn_relocs **) vpp;
1284                 }
1285
1286               p = *head;
1287               if (p == NULL || p->sec != sec)
1288                 {
1289                   bfd_size_type amt = sizeof *p;
1290                   p = ((struct elf_s390_dyn_relocs *)
1291                        bfd_alloc (htab->elf.dynobj, amt));
1292                   if (p == NULL)
1293                     return FALSE;
1294                   p->next = *head;
1295                   *head = p;
1296                   p->sec = sec;
1297                   p->count = 0;
1298                   p->pc_count = 0;
1299                 }
1300
1301               p->count += 1;
1302               if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1303                   || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1304                   || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1305                   || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1306                   || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1307                 p->pc_count += 1;
1308             }
1309           break;
1310
1311           /* This relocation describes the C++ object vtable hierarchy.
1312              Reconstruct it for later use during GC.  */
1313         case R_390_GNU_VTINHERIT:
1314           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1315             return FALSE;
1316           break;
1317
1318           /* This relocation describes which C++ vtable entries are actually
1319              used.  Record for later use during GC.  */
1320         case R_390_GNU_VTENTRY:
1321           BFD_ASSERT (h != NULL);
1322           if (h != NULL
1323               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1324             return FALSE;
1325           break;
1326
1327         default:
1328           break;
1329         }
1330     }
1331
1332   return TRUE;
1333 }
1334
1335 /* Return the section that should be marked against GC for a given
1336    relocation.  */
1337
1338 static asection *
1339 elf_s390_gc_mark_hook (asection *sec,
1340                        struct bfd_link_info *info,
1341                        Elf_Internal_Rela *rel,
1342                        struct elf_link_hash_entry *h,
1343                        Elf_Internal_Sym *sym)
1344 {
1345   if (h != NULL)
1346     switch (ELF64_R_TYPE (rel->r_info))
1347       {
1348       case R_390_GNU_VTINHERIT:
1349       case R_390_GNU_VTENTRY:
1350         return NULL;
1351       }
1352
1353   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1354 }
1355
1356 /* Update the got entry reference counts for the section being removed.  */
1357
1358 static bfd_boolean
1359 elf_s390_gc_sweep_hook (bfd *abfd,
1360                         struct bfd_link_info *info,
1361                         asection *sec,
1362                         const Elf_Internal_Rela *relocs)
1363 {
1364   struct elf_s390_link_hash_table *htab;
1365   Elf_Internal_Shdr *symtab_hdr;
1366   struct elf_link_hash_entry **sym_hashes;
1367   bfd_signed_vma *local_got_refcounts;
1368   const Elf_Internal_Rela *rel, *relend;
1369
1370   if (info->relocatable)
1371     return TRUE;
1372
1373   htab = elf_s390_hash_table (info);
1374   if (htab == NULL)
1375     return FALSE;
1376
1377   elf_section_data (sec)->local_dynrel = NULL;
1378
1379   symtab_hdr = &elf_symtab_hdr (abfd);
1380   sym_hashes = elf_sym_hashes (abfd);
1381   local_got_refcounts = elf_local_got_refcounts (abfd);
1382
1383   relend = relocs + sec->reloc_count;
1384   for (rel = relocs; rel < relend; rel++)
1385     {
1386       unsigned long r_symndx;
1387       unsigned int r_type;
1388       struct elf_link_hash_entry *h = NULL;
1389
1390       r_symndx = ELF64_R_SYM (rel->r_info);
1391       if (r_symndx >= symtab_hdr->sh_info)
1392         {
1393           struct elf_s390_link_hash_entry *eh;
1394           struct elf_s390_dyn_relocs **pp;
1395           struct elf_s390_dyn_relocs *p;
1396
1397           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1398           while (h->root.type == bfd_link_hash_indirect
1399                  || h->root.type == bfd_link_hash_warning)
1400             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1401           eh = (struct elf_s390_link_hash_entry *) h;
1402
1403           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1404             if (p->sec == sec)
1405               {
1406                 /* Everything must go for SEC.  */
1407                 *pp = p->next;
1408                 break;
1409               }
1410         }
1411
1412       r_type = ELF64_R_TYPE (rel->r_info);
1413       r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1414       switch (r_type)
1415         {
1416         case R_390_TLS_LDM64:
1417           if (htab->tls_ldm_got.refcount > 0)
1418             htab->tls_ldm_got.refcount -= 1;
1419           break;
1420
1421         case R_390_TLS_GD64:
1422         case R_390_TLS_IE64:
1423         case R_390_TLS_GOTIE12:
1424         case R_390_TLS_GOTIE20:
1425         case R_390_TLS_GOTIE64:
1426         case R_390_TLS_IEENT:
1427         case R_390_GOT12:
1428         case R_390_GOT16:
1429         case R_390_GOT20:
1430         case R_390_GOT32:
1431         case R_390_GOT64:
1432         case R_390_GOTOFF16:
1433         case R_390_GOTOFF32:
1434         case R_390_GOTOFF64:
1435         case R_390_GOTPC:
1436         case R_390_GOTPCDBL:
1437         case R_390_GOTENT:
1438           if (h != NULL)
1439             {
1440               if (h->got.refcount > 0)
1441                 h->got.refcount -= 1;
1442             }
1443           else if (local_got_refcounts != NULL)
1444             {
1445               if (local_got_refcounts[r_symndx] > 0)
1446                 local_got_refcounts[r_symndx] -= 1;
1447             }
1448           break;
1449
1450         case R_390_8:
1451         case R_390_12:
1452         case R_390_16:
1453         case R_390_20:
1454         case R_390_32:
1455         case R_390_64:
1456         case R_390_PC16:
1457         case R_390_PC16DBL:
1458         case R_390_PC32:
1459         case R_390_PC32DBL:
1460         case R_390_PC64:
1461           if (info->shared)
1462             break;
1463           /* Fall through */
1464
1465         case R_390_PLT16DBL:
1466         case R_390_PLT32:
1467         case R_390_PLT32DBL:
1468         case R_390_PLT64:
1469         case R_390_PLTOFF16:
1470         case R_390_PLTOFF32:
1471         case R_390_PLTOFF64:
1472           if (h != NULL)
1473             {
1474               if (h->plt.refcount > 0)
1475                 h->plt.refcount -= 1;
1476             }
1477           break;
1478
1479         case R_390_GOTPLT12:
1480         case R_390_GOTPLT16:
1481         case R_390_GOTPLT20:
1482         case R_390_GOTPLT32:
1483         case R_390_GOTPLT64:
1484         case R_390_GOTPLTENT:
1485           if (h != NULL)
1486             {
1487               if (h->plt.refcount > 0)
1488                 {
1489                   ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1490                   h->plt.refcount -= 1;
1491                 }
1492             }
1493           else if (local_got_refcounts != NULL)
1494             {
1495               if (local_got_refcounts[r_symndx] > 0)
1496                 local_got_refcounts[r_symndx] -= 1;
1497             }
1498           break;
1499
1500         default:
1501           break;
1502         }
1503     }
1504
1505   return TRUE;
1506 }
1507
1508 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1509    entry but we found we will not create any.  Called when we find we will
1510    not have any PLT for this symbol, by for example
1511    elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1512    or elf_s390_size_dynamic_sections if no dynamic sections will be
1513    created (we're only linking static objects).  */
1514
1515 static void
1516 elf_s390_adjust_gotplt (h)
1517      struct elf_s390_link_hash_entry *h;
1518 {
1519   if (h->elf.root.type == bfd_link_hash_warning)
1520     h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1521
1522   if (h->gotplt_refcount <= 0)
1523     return;
1524
1525   /* We simply add the number of gotplt references to the number
1526    * of got references for this symbol.  */
1527   h->elf.got.refcount += h->gotplt_refcount;
1528   h->gotplt_refcount = -1;
1529 }
1530
1531 /* Adjust a symbol defined by a dynamic object and referenced by a
1532    regular object.  The current definition is in some section of the
1533    dynamic object, but we're not including those sections.  We have to
1534    change the definition to something the rest of the link can
1535    understand.  */
1536
1537 static bfd_boolean
1538 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1539                                 struct elf_link_hash_entry *h)
1540 {
1541   struct elf_s390_link_hash_table *htab;
1542   asection *s;
1543
1544   /* If this is a function, put it in the procedure linkage table.  We
1545      will fill in the contents of the procedure linkage table later
1546      (although we could actually do it here).  */
1547   if (h->type == STT_FUNC
1548       || h->needs_plt)
1549     {
1550       if (h->plt.refcount <= 0
1551           || SYMBOL_CALLS_LOCAL (info, h)
1552           || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1553               && h->root.type == bfd_link_hash_undefweak))
1554         {
1555           /* This case can occur if we saw a PLT32 reloc in an input
1556              file, but the symbol was never referred to by a dynamic
1557              object, or if all references were garbage collected.  In
1558              such a case, we don't actually need to build a procedure
1559              linkage table, and we can just do a PC32 reloc instead.  */
1560           h->plt.offset = (bfd_vma) -1;
1561           h->needs_plt = 0;
1562           elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1563         }
1564
1565       return TRUE;
1566     }
1567   else
1568     /* It's possible that we incorrectly decided a .plt reloc was
1569        needed for an R_390_PC32 reloc to a non-function sym in
1570        check_relocs.  We can't decide accurately between function and
1571        non-function syms in check-relocs;  Objects loaded later in
1572        the link may change h->type.  So fix it now.  */
1573     h->plt.offset = (bfd_vma) -1;
1574
1575   /* If this is a weak symbol, and there is a real definition, the
1576      processor independent code will have arranged for us to see the
1577      real definition first, and we can just use the same value.  */
1578   if (h->u.weakdef != NULL)
1579     {
1580       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1581                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
1582       h->root.u.def.section = h->u.weakdef->root.u.def.section;
1583       h->root.u.def.value = h->u.weakdef->root.u.def.value;
1584       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1585         h->non_got_ref = h->u.weakdef->non_got_ref;
1586       return TRUE;
1587     }
1588
1589   /* This is a reference to a symbol defined by a dynamic object which
1590      is not a function.  */
1591
1592   /* If we are creating a shared library, we must presume that the
1593      only references to the symbol are via the global offset table.
1594      For such cases we need not do anything here; the relocations will
1595      be handled correctly by relocate_section.  */
1596   if (info->shared)
1597     return TRUE;
1598
1599   /* If there are no references to this symbol that do not use the
1600      GOT, we don't need to generate a copy reloc.  */
1601   if (!h->non_got_ref)
1602     return TRUE;
1603
1604   /* If -z nocopyreloc was given, we won't generate them either.  */
1605   if (info->nocopyreloc)
1606     {
1607       h->non_got_ref = 0;
1608       return TRUE;
1609     }
1610
1611   if (ELIMINATE_COPY_RELOCS)
1612     {
1613       struct elf_s390_link_hash_entry * eh;
1614       struct elf_s390_dyn_relocs *p;
1615
1616       eh = (struct elf_s390_link_hash_entry *) h;
1617       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1618         {
1619           s = p->sec->output_section;
1620           if (s != NULL && (s->flags & SEC_READONLY) != 0)
1621             break;
1622         }
1623
1624       /* If we didn't find any dynamic relocs in read-only sections, then
1625          we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1626       if (p == NULL)
1627         {
1628           h->non_got_ref = 0;
1629           return TRUE;
1630         }
1631     }
1632
1633   if (h->size == 0)
1634     {
1635       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1636                              h->root.root.string);
1637       return TRUE;
1638     }
1639
1640   /* We must allocate the symbol in our .dynbss section, which will
1641      become part of the .bss section of the executable.  There will be
1642      an entry for this symbol in the .dynsym section.  The dynamic
1643      object will contain position independent code, so all references
1644      from the dynamic object to this symbol will go through the global
1645      offset table.  The dynamic linker will use the .dynsym entry to
1646      determine the address it must put in the global offset table, so
1647      both the dynamic object and the regular object will refer to the
1648      same memory location for the variable.  */
1649
1650   htab = elf_s390_hash_table (info);
1651   if (htab == NULL)
1652     return FALSE;
1653
1654   /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1655      copy the initial value out of the dynamic object and into the
1656      runtime process image.  */
1657   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1658     {
1659       htab->srelbss->size += sizeof (Elf64_External_Rela);
1660       h->needs_copy = 1;
1661     }
1662
1663   s = htab->sdynbss;
1664
1665   return _bfd_elf_adjust_dynamic_copy (h, s);
1666 }
1667
1668 /* Allocate space in .plt, .got and associated reloc sections for
1669    dynamic relocs.  */
1670
1671 static bfd_boolean
1672 allocate_dynrelocs (struct elf_link_hash_entry *h,
1673                     void * inf)
1674 {
1675   struct bfd_link_info *info;
1676   struct elf_s390_link_hash_table *htab;
1677   struct elf_s390_link_hash_entry *eh;
1678   struct elf_s390_dyn_relocs *p;
1679
1680   if (h->root.type == bfd_link_hash_indirect)
1681     return TRUE;
1682
1683   if (h->root.type == bfd_link_hash_warning)
1684     /* When warning symbols are created, they **replace** the "real"
1685        entry in the hash table, thus we never get to see the real
1686        symbol in a hash traversal.  So look at it now.  */
1687     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1688
1689   info = (struct bfd_link_info *) inf;
1690   htab = elf_s390_hash_table (info);
1691   if (htab == NULL)
1692     return FALSE;
1693
1694   if (htab->elf.dynamic_sections_created
1695       && h->plt.refcount > 0)
1696     {
1697       /* Make sure this symbol is output as a dynamic symbol.
1698          Undefined weak syms won't yet be marked as dynamic.  */
1699       if (h->dynindx == -1
1700           && !h->forced_local)
1701         {
1702           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1703             return FALSE;
1704         }
1705
1706       if (info->shared
1707           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1708         {
1709           asection *s = htab->splt;
1710
1711           /* If this is the first .plt entry, make room for the special
1712              first entry.  */
1713           if (s->size == 0)
1714             s->size += PLT_FIRST_ENTRY_SIZE;
1715
1716           h->plt.offset = s->size;
1717
1718           /* If this symbol is not defined in a regular file, and we are
1719              not generating a shared library, then set the symbol to this
1720              location in the .plt.  This is required to make function
1721              pointers compare as equal between the normal executable and
1722              the shared library.  */
1723           if (! info->shared
1724               && !h->def_regular)
1725             {
1726               h->root.u.def.section = s;
1727               h->root.u.def.value = h->plt.offset;
1728             }
1729
1730           /* Make room for this entry.  */
1731           s->size += PLT_ENTRY_SIZE;
1732
1733           /* We also need to make an entry in the .got.plt section, which
1734              will be placed in the .got section by the linker script.  */
1735           htab->sgotplt->size += GOT_ENTRY_SIZE;
1736
1737           /* We also need to make an entry in the .rela.plt section.  */
1738           htab->srelplt->size += sizeof (Elf64_External_Rela);
1739         }
1740       else
1741         {
1742           h->plt.offset = (bfd_vma) -1;
1743           h->needs_plt = 0;
1744           elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1745         }
1746     }
1747   else
1748     {
1749       h->plt.offset = (bfd_vma) -1;
1750       h->needs_plt = 0;
1751       elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1752     }
1753
1754   /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1755      the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1756      to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1757      we can save the dynamic TLS relocation.  */
1758   if (h->got.refcount > 0
1759       && !info->shared
1760       && h->dynindx == -1
1761       && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1762     {
1763       if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1764         /* For the GOTIE access without a literal pool entry the offset has
1765            to be stored somewhere. The immediate value in the instruction
1766            is not bit enough so the value is stored in the got.  */
1767         {
1768           h->got.offset = htab->sgot->size;
1769           htab->sgot->size += GOT_ENTRY_SIZE;
1770         }
1771       else
1772         h->got.offset = (bfd_vma) -1;
1773     }
1774   else if (h->got.refcount > 0)
1775     {
1776       asection *s;
1777       bfd_boolean dyn;
1778       int tls_type = elf_s390_hash_entry(h)->tls_type;
1779
1780       /* Make sure this symbol is output as a dynamic symbol.
1781          Undefined weak syms won't yet be marked as dynamic.  */
1782       if (h->dynindx == -1
1783           && !h->forced_local)
1784         {
1785           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1786             return FALSE;
1787         }
1788
1789       s = htab->sgot;
1790       h->got.offset = s->size;
1791       s->size += GOT_ENTRY_SIZE;
1792       /* R_390_TLS_GD64 needs 2 consecutive GOT slots.  */
1793       if (tls_type == GOT_TLS_GD)
1794         s->size += GOT_ENTRY_SIZE;
1795       dyn = htab->elf.dynamic_sections_created;
1796       /* R_390_TLS_IE64 needs one dynamic relocation,
1797          R_390_TLS_GD64 needs one if local symbol and two if global.  */
1798       if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1799           || tls_type >= GOT_TLS_IE)
1800         htab->srelgot->size += sizeof (Elf64_External_Rela);
1801       else if (tls_type == GOT_TLS_GD)
1802         htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1803       else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1804                 || h->root.type != bfd_link_hash_undefweak)
1805                && (info->shared
1806                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1807         htab->srelgot->size += sizeof (Elf64_External_Rela);
1808     }
1809   else
1810     h->got.offset = (bfd_vma) -1;
1811
1812   eh = (struct elf_s390_link_hash_entry *) h;
1813   if (eh->dyn_relocs == NULL)
1814     return TRUE;
1815
1816   /* In the shared -Bsymbolic case, discard space allocated for
1817      dynamic pc-relative relocs against symbols which turn out to be
1818      defined in regular objects.  For the normal shared case, discard
1819      space for pc-relative relocs that have become local due to symbol
1820      visibility changes.  */
1821
1822   if (info->shared)
1823     {
1824       if (SYMBOL_CALLS_LOCAL (info, h))
1825         {
1826           struct elf_s390_dyn_relocs **pp;
1827
1828           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1829             {
1830               p->count -= p->pc_count;
1831               p->pc_count = 0;
1832               if (p->count == 0)
1833                 *pp = p->next;
1834               else
1835                 pp = &p->next;
1836             }
1837         }
1838
1839       /* Also discard relocs on undefined weak syms with non-default
1840          visibility.  */
1841       if (eh->dyn_relocs != NULL
1842           && h->root.type == bfd_link_hash_undefweak)
1843         {
1844           if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1845             eh->dyn_relocs = NULL;
1846
1847           /* Make sure undefined weak symbols are output as a dynamic
1848              symbol in PIEs.  */
1849           else if (h->dynindx == -1
1850                    && !h->forced_local)
1851             {
1852               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1853                 return FALSE;
1854             }
1855         }
1856     }
1857   else if (ELIMINATE_COPY_RELOCS)
1858     {
1859       /* For the non-shared case, discard space for relocs against
1860          symbols which turn out to need copy relocs or are not
1861          dynamic.  */
1862
1863       if (!h->non_got_ref
1864           && ((h->def_dynamic
1865                && !h->def_regular)
1866               || (htab->elf.dynamic_sections_created
1867                   && (h->root.type == bfd_link_hash_undefweak
1868                       || h->root.type == bfd_link_hash_undefined))))
1869         {
1870           /* Make sure this symbol is output as a dynamic symbol.
1871              Undefined weak syms won't yet be marked as dynamic.  */
1872           if (h->dynindx == -1
1873               && !h->forced_local)
1874             {
1875               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1876                 return FALSE;
1877             }
1878
1879           /* If that succeeded, we know we'll be keeping all the
1880              relocs.  */
1881           if (h->dynindx != -1)
1882             goto keep;
1883         }
1884
1885       eh->dyn_relocs = NULL;
1886
1887     keep: ;
1888     }
1889
1890   /* Finally, allocate space.  */
1891   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1892     {
1893       asection *sreloc = elf_section_data (p->sec)->sreloc;
1894       sreloc->size += p->count * sizeof (Elf64_External_Rela);
1895     }
1896
1897   return TRUE;
1898 }
1899
1900 /* Find any dynamic relocs that apply to read-only sections.  */
1901
1902 static bfd_boolean
1903 readonly_dynrelocs (h, inf)
1904      struct elf_link_hash_entry *h;
1905      PTR inf;
1906 {
1907   struct elf_s390_link_hash_entry *eh;
1908   struct elf_s390_dyn_relocs *p;
1909
1910   if (h->root.type == bfd_link_hash_warning)
1911     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1912
1913   eh = (struct elf_s390_link_hash_entry *) h;
1914   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1915     {
1916       asection *s = p->sec->output_section;
1917
1918       if (s != NULL && (s->flags & SEC_READONLY) != 0)
1919         {
1920           struct bfd_link_info *info = (struct bfd_link_info *) inf;
1921
1922           info->flags |= DF_TEXTREL;
1923
1924           /* Not an error, just cut short the traversal.  */
1925           return FALSE;
1926         }
1927     }
1928   return TRUE;
1929 }
1930
1931 /* Set the sizes of the dynamic sections.  */
1932
1933 static bfd_boolean
1934 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1935                                 struct bfd_link_info *info)
1936 {
1937   struct elf_s390_link_hash_table *htab;
1938   bfd *dynobj;
1939   asection *s;
1940   bfd_boolean relocs;
1941   bfd *ibfd;
1942
1943   htab = elf_s390_hash_table (info);
1944   if (htab == NULL)
1945     return FALSE;
1946
1947   dynobj = htab->elf.dynobj;
1948   if (dynobj == NULL)
1949     abort ();
1950
1951   if (htab->elf.dynamic_sections_created)
1952     {
1953       /* Set the contents of the .interp section to the interpreter.  */
1954       if (info->executable)
1955         {
1956           s = bfd_get_section_by_name (dynobj, ".interp");
1957           if (s == NULL)
1958             abort ();
1959           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1960           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1961         }
1962     }
1963
1964   /* Set up .got offsets for local syms, and space for local dynamic
1965      relocs.  */
1966   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1967     {
1968       bfd_signed_vma *local_got;
1969       bfd_signed_vma *end_local_got;
1970       char *local_tls_type;
1971       bfd_size_type locsymcount;
1972       Elf_Internal_Shdr *symtab_hdr;
1973       asection *srela;
1974
1975       if (! is_s390_elf (ibfd))
1976         continue;
1977
1978       for (s = ibfd->sections; s != NULL; s = s->next)
1979         {
1980           struct elf_s390_dyn_relocs *p;
1981
1982           for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1983             {
1984               if (!bfd_is_abs_section (p->sec)
1985                   && bfd_is_abs_section (p->sec->output_section))
1986                 {
1987                   /* Input section has been discarded, either because
1988                      it is a copy of a linkonce section or due to
1989                      linker script /DISCARD/, so we'll be discarding
1990                      the relocs too.  */
1991                 }
1992               else if (p->count != 0)
1993                 {
1994                   srela = elf_section_data (p->sec)->sreloc;
1995                   srela->size += p->count * sizeof (Elf64_External_Rela);
1996                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1997                     info->flags |= DF_TEXTREL;
1998                 }
1999             }
2000         }
2001
2002       local_got = elf_local_got_refcounts (ibfd);
2003       if (!local_got)
2004         continue;
2005
2006       symtab_hdr = &elf_symtab_hdr (ibfd);
2007       locsymcount = symtab_hdr->sh_info;
2008       end_local_got = local_got + locsymcount;
2009       local_tls_type = elf_s390_local_got_tls_type (ibfd);
2010       s = htab->sgot;
2011       srela = htab->srelgot;
2012       for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2013         {
2014           if (*local_got > 0)
2015             {
2016               *local_got = s->size;
2017               s->size += GOT_ENTRY_SIZE;
2018               if (*local_tls_type == GOT_TLS_GD)
2019                 s->size += GOT_ENTRY_SIZE;
2020               if (info->shared)
2021                 srela->size += sizeof (Elf64_External_Rela);
2022             }
2023           else
2024             *local_got = (bfd_vma) -1;
2025         }
2026     }
2027
2028   if (htab->tls_ldm_got.refcount > 0)
2029     {
2030       /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2031          relocs.  */
2032       htab->tls_ldm_got.offset = htab->sgot->size;
2033       htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2034       htab->srelgot->size += sizeof (Elf64_External_Rela);
2035     }
2036   else
2037     htab->tls_ldm_got.offset = -1;
2038
2039   /* Allocate global sym .plt and .got entries, and space for global
2040      sym dynamic relocs.  */
2041   elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2042
2043   /* We now have determined the sizes of the various dynamic sections.
2044      Allocate memory for them.  */
2045   relocs = FALSE;
2046   for (s = dynobj->sections; s != NULL; s = s->next)
2047     {
2048       if ((s->flags & SEC_LINKER_CREATED) == 0)
2049         continue;
2050
2051       if (s == htab->splt
2052           || s == htab->sgot
2053           || s == htab->sgotplt
2054           || s == htab->sdynbss)
2055         {
2056           /* Strip this section if we don't need it; see the
2057              comment below.  */
2058         }
2059       else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2060         {
2061           if (s->size != 0 && s != htab->srelplt)
2062             relocs = TRUE;
2063
2064           /* We use the reloc_count field as a counter if we need
2065              to copy relocs into the output file.  */
2066           s->reloc_count = 0;
2067         }
2068       else
2069         {
2070           /* It's not one of our sections, so don't allocate space.  */
2071           continue;
2072         }
2073
2074       if (s->size == 0)
2075         {
2076           /* If we don't need this section, strip it from the
2077              output file.  This is to handle .rela.bss and
2078              .rela.plt.  We must create it in
2079              create_dynamic_sections, because it must be created
2080              before the linker maps input sections to output
2081              sections.  The linker does that before
2082              adjust_dynamic_symbol is called, and it is that
2083              function which decides whether anything needs to go
2084              into these sections.  */
2085
2086           s->flags |= SEC_EXCLUDE;
2087           continue;
2088         }
2089
2090       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2091         continue;
2092
2093       /* Allocate memory for the section contents.  We use bfd_zalloc
2094          here in case unused entries are not reclaimed before the
2095          section's contents are written out.  This should not happen,
2096          but this way if it does, we get a R_390_NONE reloc instead
2097          of garbage.  */
2098       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2099       if (s->contents == NULL)
2100         return FALSE;
2101     }
2102
2103   if (htab->elf.dynamic_sections_created)
2104     {
2105       /* Add some entries to the .dynamic section.  We fill in the
2106          values later, in elf_s390_finish_dynamic_sections, but we
2107          must add the entries now so that we get the correct size for
2108          the .dynamic section.  The DT_DEBUG entry is filled in by the
2109          dynamic linker and used by the debugger.  */
2110 #define add_dynamic_entry(TAG, VAL) \
2111   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2112
2113       if (info->executable)
2114         {
2115           if (!add_dynamic_entry (DT_DEBUG, 0))
2116             return FALSE;
2117         }
2118
2119       if (htab->splt->size != 0)
2120         {
2121           if (!add_dynamic_entry (DT_PLTGOT, 0)
2122               || !add_dynamic_entry (DT_PLTRELSZ, 0)
2123               || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2124               || !add_dynamic_entry (DT_JMPREL, 0))
2125             return FALSE;
2126         }
2127
2128       if (relocs)
2129         {
2130           if (!add_dynamic_entry (DT_RELA, 0)
2131               || !add_dynamic_entry (DT_RELASZ, 0)
2132               || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2133             return FALSE;
2134
2135           /* If any dynamic relocs apply to a read-only section,
2136              then we need a DT_TEXTREL entry.  */
2137           if ((info->flags & DF_TEXTREL) == 0)
2138             elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2139                                     (PTR) info);
2140
2141           if ((info->flags & DF_TEXTREL) != 0)
2142             {
2143               if (!add_dynamic_entry (DT_TEXTREL, 0))
2144                 return FALSE;
2145             }
2146         }
2147     }
2148 #undef add_dynamic_entry
2149
2150   return TRUE;
2151 }
2152
2153 /* Return the base VMA address which should be subtracted from real addresses
2154    when resolving @dtpoff relocation.
2155    This is PT_TLS segment p_vaddr.  */
2156
2157 static bfd_vma
2158 dtpoff_base (info)
2159      struct bfd_link_info *info;
2160 {
2161   /* If tls_sec is NULL, we should have signalled an error already.  */
2162   if (elf_hash_table (info)->tls_sec == NULL)
2163     return 0;
2164   return elf_hash_table (info)->tls_sec->vma;
2165 }
2166
2167 /* Return the relocation value for @tpoff relocation
2168    if STT_TLS virtual address is ADDRESS.  */
2169
2170 static bfd_vma
2171 tpoff (info, address)
2172      struct bfd_link_info *info;
2173      bfd_vma address;
2174 {
2175   struct elf_link_hash_table *htab = elf_hash_table (info);
2176
2177   /* If tls_sec is NULL, we should have signalled an error already.  */
2178   if (htab->tls_sec == NULL)
2179     return 0;
2180   return htab->tls_size + htab->tls_sec->vma - address;
2181 }
2182
2183 /* Complain if TLS instruction relocation is against an invalid
2184    instruction.  */
2185
2186 static void
2187 invalid_tls_insn (input_bfd, input_section, rel)
2188      bfd *input_bfd;
2189      asection *input_section;
2190      Elf_Internal_Rela *rel;
2191 {
2192   reloc_howto_type *howto;
2193
2194   howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2195   (*_bfd_error_handler)
2196     (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2197      input_bfd,
2198      input_section,
2199      (long) rel->r_offset,
2200      howto->name);
2201   bfd_set_error (bfd_error_bad_value);
2202 }
2203
2204 /* Relocate a 390 ELF section.  */
2205
2206 static bfd_boolean
2207 elf_s390_relocate_section (bfd *output_bfd,
2208                            struct bfd_link_info *info,
2209                            bfd *input_bfd,
2210                            asection *input_section,
2211                            bfd_byte *contents,
2212                            Elf_Internal_Rela *relocs,
2213                            Elf_Internal_Sym *local_syms,
2214                            asection **local_sections)
2215 {
2216   struct elf_s390_link_hash_table *htab;
2217   Elf_Internal_Shdr *symtab_hdr;
2218   struct elf_link_hash_entry **sym_hashes;
2219   bfd_vma *local_got_offsets;
2220   Elf_Internal_Rela *rel;
2221   Elf_Internal_Rela *relend;
2222
2223   BFD_ASSERT (is_s390_elf (input_bfd));
2224
2225   htab = elf_s390_hash_table (info);
2226   if (htab == NULL)
2227     return FALSE;
2228
2229   symtab_hdr = &elf_symtab_hdr (input_bfd);
2230   sym_hashes = elf_sym_hashes (input_bfd);
2231   local_got_offsets = elf_local_got_offsets (input_bfd);
2232
2233   rel = relocs;
2234   relend = relocs + input_section->reloc_count;
2235   for (; rel < relend; rel++)
2236     {
2237       unsigned int r_type;
2238       reloc_howto_type *howto;
2239       unsigned long r_symndx;
2240       struct elf_link_hash_entry *h;
2241       Elf_Internal_Sym *sym;
2242       asection *sec;
2243       bfd_vma off;
2244       bfd_vma relocation;
2245       bfd_boolean unresolved_reloc;
2246       bfd_reloc_status_type r;
2247       int tls_type;
2248
2249       r_type = ELF64_R_TYPE (rel->r_info);
2250       if (r_type == (int) R_390_GNU_VTINHERIT
2251           || r_type == (int) R_390_GNU_VTENTRY)
2252         continue;
2253       if (r_type >= (int) R_390_max)
2254         {
2255           bfd_set_error (bfd_error_bad_value);
2256           return FALSE;
2257         }
2258
2259       howto = elf_howto_table + r_type;
2260       r_symndx = ELF64_R_SYM (rel->r_info);
2261
2262       h = NULL;
2263       sym = NULL;
2264       sec = NULL;
2265       unresolved_reloc = FALSE;
2266       if (r_symndx < symtab_hdr->sh_info)
2267         {
2268           sym = local_syms + r_symndx;
2269           sec = local_sections[r_symndx];
2270           relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2271         }
2272       else
2273         {
2274           bfd_boolean warned ATTRIBUTE_UNUSED;
2275
2276           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2277                                    r_symndx, symtab_hdr, sym_hashes,
2278                                    h, sec, relocation,
2279                                    unresolved_reloc, warned);
2280         }
2281
2282       if (sec != NULL && elf_discarded_section (sec))
2283         RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2284                                          rel, relend, howto, contents);
2285
2286       if (info->relocatable)
2287         continue;
2288
2289       switch (r_type)
2290         {
2291         case R_390_GOTPLT12:
2292         case R_390_GOTPLT16:
2293         case R_390_GOTPLT20:
2294         case R_390_GOTPLT32:
2295         case R_390_GOTPLT64:
2296         case R_390_GOTPLTENT:
2297           /* There are three cases for a GOTPLT relocation. 1) The
2298              relocation is against the jump slot entry of a plt that
2299              will get emitted to the output file. 2) The relocation
2300              is against the jump slot of a plt entry that has been
2301              removed. elf_s390_adjust_gotplt has created a GOT entry
2302              as replacement. 3) The relocation is against a local symbol.
2303              Cases 2) and 3) are the same as the GOT relocation code
2304              so we just have to test for case 1 and fall through for
2305              the other two.  */
2306           if (h != NULL && h->plt.offset != (bfd_vma) -1)
2307             {
2308               bfd_vma plt_index;
2309
2310               /* Calc. index no.
2311                  Current offset - size first entry / entry size.  */
2312               plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2313                 PLT_ENTRY_SIZE;
2314
2315               /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2316                  addr & GOT addr.  */
2317               relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2318               unresolved_reloc = FALSE;
2319
2320               if (r_type == R_390_GOTPLTENT)
2321                 relocation += htab->sgot->output_section->vma;
2322               break;
2323             }
2324           /* Fall through.  */
2325
2326         case R_390_GOT12:
2327         case R_390_GOT16:
2328         case R_390_GOT20:
2329         case R_390_GOT32:
2330         case R_390_GOT64:
2331         case R_390_GOTENT:
2332           /* Relocation is to the entry for this symbol in the global
2333              offset table.  */
2334           if (htab->sgot == NULL)
2335             abort ();
2336
2337           if (h != NULL)
2338             {
2339               bfd_boolean dyn;
2340
2341               off = h->got.offset;
2342               dyn = htab->elf.dynamic_sections_created;
2343               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2344                   || (info->shared
2345                       && SYMBOL_REFERENCES_LOCAL (info, h))
2346                   || (ELF_ST_VISIBILITY (h->other)
2347                       && h->root.type == bfd_link_hash_undefweak))
2348                 {
2349                   /* This is actually a static link, or it is a
2350                      -Bsymbolic link and the symbol is defined
2351                      locally, or the symbol was forced to be local
2352                      because of a version file.  We must initialize
2353                      this entry in the global offset table.  Since the
2354                      offset must always be a multiple of 2, we use the
2355                      least significant bit to record whether we have
2356                      initialized it already.
2357
2358                      When doing a dynamic link, we create a .rel.got
2359                      relocation entry to initialize the value.  This
2360                      is done in the finish_dynamic_symbol routine.  */
2361                   if ((off & 1) != 0)
2362                     off &= ~1;
2363                   else
2364                     {
2365                       bfd_put_64 (output_bfd, relocation,
2366                                   htab->sgot->contents + off);
2367                       h->got.offset |= 1;
2368                     }
2369                 }
2370               else
2371                 unresolved_reloc = FALSE;
2372             }
2373           else
2374             {
2375               if (local_got_offsets == NULL)
2376                 abort ();
2377
2378               off = local_got_offsets[r_symndx];
2379
2380               /* The offset must always be a multiple of 8.  We use
2381                  the least significant bit to record whether we have
2382                  already generated the necessary reloc.  */
2383               if ((off & 1) != 0)
2384                 off &= ~1;
2385               else
2386                 {
2387                   bfd_put_64 (output_bfd, relocation,
2388                               htab->sgot->contents + off);
2389
2390                   if (info->shared)
2391                     {
2392                       asection *s;
2393                       Elf_Internal_Rela outrel;
2394                       bfd_byte *loc;
2395
2396                       s = htab->srelgot;
2397                       if (s == NULL)
2398                         abort ();
2399
2400                       outrel.r_offset = (htab->sgot->output_section->vma
2401                                          + htab->sgot->output_offset
2402                                          + off);
2403                       outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2404                       outrel.r_addend = relocation;
2405                       loc = s->contents;
2406                       loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2407                       bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2408                     }
2409
2410                   local_got_offsets[r_symndx] |= 1;
2411                 }
2412             }
2413
2414           if (off >= (bfd_vma) -2)
2415             abort ();
2416
2417           relocation = htab->sgot->output_offset + off;
2418
2419           /* For @GOTENT the relocation is against the offset between
2420              the instruction and the symbols entry in the GOT and not
2421              between the start of the GOT and the symbols entry. We
2422              add the vma of the GOT to get the correct value.  */
2423           if (   r_type == R_390_GOTENT
2424               || r_type == R_390_GOTPLTENT)
2425             relocation += htab->sgot->output_section->vma;
2426
2427           break;
2428
2429         case R_390_GOTOFF16:
2430         case R_390_GOTOFF32:
2431         case R_390_GOTOFF64:
2432           /* Relocation is relative to the start of the global offset
2433              table.  */
2434
2435           /* Note that sgot->output_offset is not involved in this
2436              calculation.  We always want the start of .got.  If we
2437              defined _GLOBAL_OFFSET_TABLE in a different way, as is
2438              permitted by the ABI, we might have to change this
2439              calculation.  */
2440           relocation -= htab->sgot->output_section->vma;
2441           break;
2442
2443         case R_390_GOTPC:
2444         case R_390_GOTPCDBL:
2445           /* Use global offset table as symbol value.  */
2446           relocation = htab->sgot->output_section->vma;
2447           unresolved_reloc = FALSE;
2448           break;
2449
2450         case R_390_PLT16DBL:
2451         case R_390_PLT32:
2452         case R_390_PLT32DBL:
2453         case R_390_PLT64:
2454           /* Relocation is to the entry for this symbol in the
2455              procedure linkage table.  */
2456
2457           /* Resolve a PLT32 reloc against a local symbol directly,
2458              without using the procedure linkage table.  */
2459           if (h == NULL)
2460             break;
2461
2462           if (h->plt.offset == (bfd_vma) -1
2463               || htab->splt == NULL)
2464             {
2465               /* We didn't make a PLT entry for this symbol.  This
2466                  happens when statically linking PIC code, or when
2467                  using -Bsymbolic.  */
2468               break;
2469             }
2470
2471           relocation = (htab->splt->output_section->vma
2472                         + htab->splt->output_offset
2473                         + h->plt.offset);
2474           unresolved_reloc = FALSE;
2475           break;
2476
2477         case R_390_PLTOFF16:
2478         case R_390_PLTOFF32:
2479         case R_390_PLTOFF64:
2480           /* Relocation is to the entry for this symbol in the
2481              procedure linkage table relative to the start of the GOT.  */
2482
2483           /* For local symbols or if we didn't make a PLT entry for
2484              this symbol resolve the symbol directly.  */
2485           if (   h == NULL
2486               || h->plt.offset == (bfd_vma) -1
2487               || htab->splt == NULL)
2488             {
2489               relocation -= htab->sgot->output_section->vma;
2490               break;
2491             }
2492
2493           relocation = (htab->splt->output_section->vma
2494                         + htab->splt->output_offset
2495                         + h->plt.offset
2496                         - htab->sgot->output_section->vma);
2497           unresolved_reloc = FALSE;
2498           break;
2499
2500         case R_390_8:
2501         case R_390_16:
2502         case R_390_32:
2503         case R_390_64:
2504         case R_390_PC16:
2505         case R_390_PC16DBL:
2506         case R_390_PC32:
2507         case R_390_PC32DBL:
2508         case R_390_PC64:
2509           if ((input_section->flags & SEC_ALLOC) == 0)
2510             break;
2511
2512           if ((info->shared
2513                && (h == NULL
2514                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2515                    || h->root.type != bfd_link_hash_undefweak)
2516                && ((r_type != R_390_PC16
2517                     && r_type != R_390_PC16DBL
2518                     && r_type != R_390_PC32
2519                     && r_type != R_390_PC32DBL
2520                     && r_type != R_390_PC64)
2521                    || !SYMBOL_CALLS_LOCAL (info, h)))
2522               || (ELIMINATE_COPY_RELOCS
2523                   && !info->shared
2524                   && h != NULL
2525                   && h->dynindx != -1
2526                   && !h->non_got_ref
2527                   && ((h->def_dynamic
2528                        && !h->def_regular)
2529                       || h->root.type == bfd_link_hash_undefweak
2530                       || h->root.type == bfd_link_hash_undefined)))
2531             {
2532               Elf_Internal_Rela outrel;
2533               bfd_boolean skip, relocate;
2534               asection *sreloc;
2535               bfd_byte *loc;
2536
2537               /* When generating a shared object, these relocations
2538                  are copied into the output file to be resolved at run
2539                  time.  */
2540               skip = FALSE;
2541               relocate = FALSE;
2542
2543               outrel.r_offset =
2544                 _bfd_elf_section_offset (output_bfd, info, input_section,
2545                                          rel->r_offset);
2546               if (outrel.r_offset == (bfd_vma) -1)
2547                 skip = TRUE;
2548               else if (outrel.r_offset == (bfd_vma) -2)
2549                 skip = TRUE, relocate = TRUE;
2550
2551               outrel.r_offset += (input_section->output_section->vma
2552                                   + input_section->output_offset);
2553
2554               if (skip)
2555                 memset (&outrel, 0, sizeof outrel);
2556               else if (h != NULL
2557                        && h->dynindx != -1
2558                        && (r_type == R_390_PC16
2559                            || r_type == R_390_PC16DBL
2560                            || r_type == R_390_PC32
2561                            || r_type == R_390_PC32DBL
2562                            || r_type == R_390_PC64
2563                            || !info->shared
2564                            || !SYMBOLIC_BIND (info, h)
2565                            || !h->def_regular))
2566                 {
2567                   outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2568                   outrel.r_addend = rel->r_addend;
2569                 }
2570               else
2571                 {
2572                   /* This symbol is local, or marked to become local.  */
2573                   outrel.r_addend = relocation + rel->r_addend;
2574                   if (r_type == R_390_64)
2575                     {
2576                       relocate = TRUE;
2577                       outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2578                     }
2579                   else
2580                     {
2581                       long sindx;
2582
2583                       if (bfd_is_abs_section (sec))
2584                         sindx = 0;
2585                       else if (sec == NULL || sec->owner == NULL)
2586                         {
2587                           bfd_set_error(bfd_error_bad_value);
2588                           return FALSE;
2589                         }
2590                       else
2591                         {
2592                           asection *osec;
2593
2594                           osec = sec->output_section;
2595                           sindx = elf_section_data (osec)->dynindx;
2596
2597                           if (sindx == 0)
2598                             {
2599                               osec = htab->elf.text_index_section;
2600                               sindx = elf_section_data (osec)->dynindx;
2601                             }
2602                           BFD_ASSERT (sindx != 0);
2603
2604                           /* We are turning this relocation into one
2605                              against a section symbol, so subtract out
2606                              the output section's address but not the
2607                              offset of the input section in the output
2608                              section.  */
2609                           outrel.r_addend -= osec->vma;
2610                         }
2611                       outrel.r_info = ELF64_R_INFO (sindx, r_type);
2612                     }
2613                 }
2614
2615               sreloc = elf_section_data (input_section)->sreloc;
2616               if (sreloc == NULL)
2617                 abort ();
2618
2619               loc = sreloc->contents;
2620               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2621               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2622
2623               /* If this reloc is against an external symbol, we do
2624                  not want to fiddle with the addend.  Otherwise, we
2625                  need to include the symbol value so that it becomes
2626                  an addend for the dynamic reloc.  */
2627               if (! relocate)
2628                 continue;
2629             }
2630
2631           break;
2632
2633           /* Relocations for tls literal pool entries.  */
2634         case R_390_TLS_IE64:
2635           if (info->shared)
2636             {
2637               Elf_Internal_Rela outrel;
2638               asection *sreloc;
2639               bfd_byte *loc;
2640
2641               outrel.r_offset = rel->r_offset
2642                                 + input_section->output_section->vma
2643                                 + input_section->output_offset;
2644               outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2645               sreloc = elf_section_data (input_section)->sreloc;
2646               if (sreloc == NULL)
2647                 abort ();
2648               loc = sreloc->contents;
2649               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2650               bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2651             }
2652           /* Fall through.  */
2653
2654         case R_390_TLS_GD64:
2655         case R_390_TLS_GOTIE64:
2656           r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2657           tls_type = GOT_UNKNOWN;
2658           if (h == NULL && local_got_offsets)
2659             tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2660           else if (h != NULL)
2661             {
2662               tls_type = elf_s390_hash_entry(h)->tls_type;
2663               if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2664                 r_type = R_390_TLS_LE64;
2665             }
2666           if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2667             r_type = R_390_TLS_IE64;
2668
2669           if (r_type == R_390_TLS_LE64)
2670             {
2671               /* This relocation gets optimized away by the local exec
2672                  access optimization.  */
2673               BFD_ASSERT (! unresolved_reloc);
2674               bfd_put_64 (output_bfd, -tpoff (info, relocation),
2675                           contents + rel->r_offset);
2676               continue;
2677             }
2678
2679           if (htab->sgot == NULL)
2680             abort ();
2681
2682           if (h != NULL)
2683             off = h->got.offset;
2684           else
2685             {
2686               if (local_got_offsets == NULL)
2687                 abort ();
2688
2689               off = local_got_offsets[r_symndx];
2690             }
2691
2692         emit_tls_relocs:
2693
2694           if ((off & 1) != 0)
2695             off &= ~1;
2696           else
2697             {
2698               Elf_Internal_Rela outrel;
2699               bfd_byte *loc;
2700               int dr_type, indx;
2701
2702               if (htab->srelgot == NULL)
2703                 abort ();
2704
2705               outrel.r_offset = (htab->sgot->output_section->vma
2706                                  + htab->sgot->output_offset + off);
2707
2708               indx = h && h->dynindx != -1 ? h->dynindx : 0;
2709               if (r_type == R_390_TLS_GD64)
2710                 dr_type = R_390_TLS_DTPMOD;
2711               else
2712                 dr_type = R_390_TLS_TPOFF;
2713               if (dr_type == R_390_TLS_TPOFF && indx == 0)
2714                 outrel.r_addend = relocation - dtpoff_base (info);
2715               else
2716                 outrel.r_addend = 0;
2717               outrel.r_info = ELF64_R_INFO (indx, dr_type);
2718               loc = htab->srelgot->contents;
2719               loc += htab->srelgot->reloc_count++
2720                 * sizeof (Elf64_External_Rela);
2721               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2722
2723               if (r_type == R_390_TLS_GD64)
2724                 {
2725                   if (indx == 0)
2726                     {
2727                       BFD_ASSERT (! unresolved_reloc);
2728                       bfd_put_64 (output_bfd,
2729                                   relocation - dtpoff_base (info),
2730                                   htab->sgot->contents + off + GOT_ENTRY_SIZE);
2731                     }
2732                   else
2733                     {
2734                       outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2735                       outrel.r_offset += GOT_ENTRY_SIZE;
2736                       outrel.r_addend = 0;
2737                       htab->srelgot->reloc_count++;
2738                       loc += sizeof (Elf64_External_Rela);
2739                       bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2740                     }
2741                 }
2742
2743               if (h != NULL)
2744                 h->got.offset |= 1;
2745               else
2746                 local_got_offsets[r_symndx] |= 1;
2747             }
2748
2749           if (off >= (bfd_vma) -2)
2750             abort ();
2751           if (r_type == ELF64_R_TYPE (rel->r_info))
2752             {
2753               relocation = htab->sgot->output_offset + off;
2754               if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2755                 relocation += htab->sgot->output_section->vma;
2756               unresolved_reloc = FALSE;
2757             }
2758           else
2759             {
2760               bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2761                           contents + rel->r_offset);
2762               continue;
2763             }
2764           break;
2765
2766         case R_390_TLS_GOTIE12:
2767         case R_390_TLS_GOTIE20:
2768         case R_390_TLS_IEENT:
2769           if (h == NULL)
2770             {
2771               if (local_got_offsets == NULL)
2772                 abort();
2773               off = local_got_offsets[r_symndx];
2774               if (info->shared)
2775                 goto emit_tls_relocs;
2776             }
2777           else
2778             {
2779               off = h->got.offset;
2780               tls_type = elf_s390_hash_entry(h)->tls_type;
2781               if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2782                 goto emit_tls_relocs;
2783             }
2784
2785           if (htab->sgot == NULL)
2786             abort ();
2787
2788           BFD_ASSERT (! unresolved_reloc);
2789           bfd_put_64 (output_bfd, -tpoff (info, relocation),
2790                       htab->sgot->contents + off);
2791           relocation = htab->sgot->output_offset + off;
2792           if (r_type == R_390_TLS_IEENT)
2793             relocation += htab->sgot->output_section->vma;
2794           unresolved_reloc = FALSE;
2795           break;
2796
2797         case R_390_TLS_LDM64:
2798           if (! info->shared)
2799             /* The literal pool entry this relocation refers to gets ignored
2800                by the optimized code of the local exec model. Do nothing
2801                and the value will turn out zero.  */
2802             continue;
2803
2804           if (htab->sgot == NULL)
2805             abort ();
2806
2807           off = htab->tls_ldm_got.offset;
2808           if (off & 1)
2809             off &= ~1;
2810           else
2811             {
2812               Elf_Internal_Rela outrel;
2813               bfd_byte *loc;
2814
2815               if (htab->srelgot == NULL)
2816                 abort ();
2817
2818               outrel.r_offset = (htab->sgot->output_section->vma
2819                                  + htab->sgot->output_offset + off);
2820
2821               bfd_put_64 (output_bfd, 0,
2822                           htab->sgot->contents + off + GOT_ENTRY_SIZE);
2823               outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2824               outrel.r_addend = 0;
2825               loc = htab->srelgot->contents;
2826               loc += htab->srelgot->reloc_count++
2827                 * sizeof (Elf64_External_Rela);
2828               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2829               htab->tls_ldm_got.offset |= 1;
2830             }
2831           relocation = htab->sgot->output_offset + off;
2832           unresolved_reloc = FALSE;
2833           break;
2834
2835         case R_390_TLS_LE64:
2836           if (info->shared)
2837             {
2838               /* Linking a shared library with non-fpic code requires
2839                  a R_390_TLS_TPOFF relocation.  */
2840               Elf_Internal_Rela outrel;
2841               asection *sreloc;
2842               bfd_byte *loc;
2843               int indx;
2844
2845               outrel.r_offset = rel->r_offset
2846                                 + input_section->output_section->vma
2847                                 + input_section->output_offset;
2848               if (h != NULL && h->dynindx != -1)
2849                 indx = h->dynindx;
2850               else
2851                 indx = 0;
2852               outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2853               if (indx == 0)
2854                 outrel.r_addend = relocation - dtpoff_base (info);
2855               else
2856                 outrel.r_addend = 0;
2857               sreloc = elf_section_data (input_section)->sreloc;
2858               if (sreloc == NULL)
2859                 abort ();
2860               loc = sreloc->contents;
2861               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2862               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2863             }
2864           else
2865             {
2866               BFD_ASSERT (! unresolved_reloc);
2867               bfd_put_64 (output_bfd, -tpoff (info, relocation),
2868                           contents + rel->r_offset);
2869             }
2870           continue;
2871
2872         case R_390_TLS_LDO64:
2873           if (info->shared)
2874             relocation -= dtpoff_base (info);
2875           else
2876             /* When converting LDO to LE, we must negate.  */
2877             relocation = -tpoff (info, relocation);
2878           break;
2879
2880           /* Relocations for tls instructions.  */
2881         case R_390_TLS_LOAD:
2882         case R_390_TLS_GDCALL:
2883         case R_390_TLS_LDCALL:
2884           tls_type = GOT_UNKNOWN;
2885           if (h == NULL && local_got_offsets)
2886             tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2887           else if (h != NULL)
2888             tls_type = elf_s390_hash_entry(h)->tls_type;
2889
2890           if (tls_type == GOT_TLS_GD)
2891             continue;
2892
2893           if (r_type == R_390_TLS_LOAD)
2894             {
2895               if (!info->shared && (h == NULL || h->dynindx == -1))
2896                 {
2897                   /* IE->LE transition. Four valid cases:
2898                      lg %rx,(0,%ry)    -> sllg %rx,%ry,0
2899                      lg %rx,(%ry,0)    -> sllg %rx,%ry,0
2900                      lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2901                      lg %rx,(%r12,%ry) -> sllg %rx,%ry,0  */
2902                   unsigned int insn0, insn1, ry;
2903
2904                   insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2905                   insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2906                   if (insn1 != 0x0004)
2907                     invalid_tls_insn (input_bfd, input_section, rel);
2908                   ry = 0;
2909                   if ((insn0 & 0xff00f000) == 0xe3000000)
2910                     /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0  */
2911                     ry = (insn0 & 0x000f0000);
2912                   else if ((insn0 & 0xff0f0000) == 0xe3000000)
2913                     /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0  */
2914                     ry = (insn0 & 0x0000f000) << 4;
2915                   else if ((insn0 & 0xff00f000) == 0xe300c000)
2916                     /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0  */
2917                     ry = (insn0 & 0x000f0000);
2918                   else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2919                     /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0  */
2920                     ry = (insn0 & 0x0000f000) << 4;
2921                   else
2922                     invalid_tls_insn (input_bfd, input_section, rel);
2923                   insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2924                   insn1 = 0x000d;
2925                   bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2926                   bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2927                 }
2928             }
2929           else if (r_type == R_390_TLS_GDCALL)
2930             {
2931               unsigned int insn0, insn1;
2932
2933               insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2934               insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2935               if ((insn0 & 0xffff0000) != 0xc0e50000)
2936                 invalid_tls_insn (input_bfd, input_section, rel);
2937               if (!info->shared && (h == NULL || h->dynindx == -1))
2938                 {
2939                   /* GD->LE transition.
2940                      brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2941                   insn0 = 0xc0040000;
2942                   insn1 = 0x0000;
2943                 }
2944               else
2945                 {
2946                   /* GD->IE transition.
2947                      brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12)  */
2948                   insn0 = 0xe322c000;
2949                   insn1 = 0x0004;
2950                 }
2951               bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2952               bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2953             }
2954           else if (r_type == R_390_TLS_LDCALL)
2955             {
2956               if (!info->shared)
2957                 {
2958                   unsigned int insn0, insn1;
2959
2960                   insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2961                   insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2962                   if ((insn0 & 0xffff0000) != 0xc0e50000)
2963                     invalid_tls_insn (input_bfd, input_section, rel);
2964                   /* LD->LE transition.
2965                      brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2966                   insn0 = 0xc0040000;
2967                   insn1 = 0x0000;
2968                   bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2969                   bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2970                 }
2971             }
2972           continue;
2973
2974         default:
2975           break;
2976         }
2977
2978       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2979          because such sections are not SEC_ALLOC and thus ld.so will
2980          not process them.  */
2981       if (unresolved_reloc
2982           && !((input_section->flags & SEC_DEBUGGING) != 0
2983                && h->def_dynamic))
2984         (*_bfd_error_handler)
2985           (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2986            input_bfd,
2987            input_section,
2988            (long) rel->r_offset,
2989            howto->name,
2990            h->root.root.string);
2991
2992       if (r_type == R_390_20
2993           || r_type == R_390_GOT20
2994           || r_type == R_390_GOTPLT20
2995           || r_type == R_390_TLS_GOTIE20)
2996         {
2997           relocation += rel->r_addend;
2998           relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
2999           r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3000                                         contents, rel->r_offset,
3001                                         relocation, 0);
3002         }
3003       else
3004         r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3005                                       contents, rel->r_offset,
3006                                       relocation, rel->r_addend);
3007
3008       if (r != bfd_reloc_ok)
3009         {
3010           const char *name;
3011
3012           if (h != NULL)
3013             name = h->root.root.string;
3014           else
3015             {
3016               name = bfd_elf_string_from_elf_section (input_bfd,
3017                                                       symtab_hdr->sh_link,
3018                                                       sym->st_name);
3019               if (name == NULL)
3020                 return FALSE;
3021               if (*name == '\0')
3022                 name = bfd_section_name (input_bfd, sec);
3023             }
3024
3025           if (r == bfd_reloc_overflow)
3026             {
3027
3028               if (! ((*info->callbacks->reloc_overflow)
3029                      (info, (h ? &h->root : NULL), name, howto->name,
3030                       (bfd_vma) 0, input_bfd, input_section,
3031                       rel->r_offset)))
3032                 return FALSE;
3033             }
3034           else
3035             {
3036               (*_bfd_error_handler)
3037                 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3038                  input_bfd, input_section,
3039                  (long) rel->r_offset, name, (int) r);
3040               return FALSE;
3041             }
3042         }
3043     }
3044
3045   return TRUE;
3046 }
3047
3048 /* Finish up dynamic symbol handling.  We set the contents of various
3049    dynamic sections here.  */
3050
3051 static bfd_boolean
3052 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3053                                 struct bfd_link_info *info,
3054                                 struct elf_link_hash_entry *h,
3055                                 Elf_Internal_Sym *sym)
3056 {
3057   struct elf_s390_link_hash_table *htab;
3058
3059   htab = elf_s390_hash_table (info);
3060   if (htab == NULL)
3061     return FALSE;
3062
3063   if (h->plt.offset != (bfd_vma) -1)
3064     {
3065       bfd_vma plt_index;
3066       bfd_vma got_offset;
3067       Elf_Internal_Rela rela;
3068       bfd_byte *loc;
3069
3070       /* This symbol has an entry in the procedure linkage table.  Set
3071          it up.  */
3072
3073       if (h->dynindx == -1
3074           || htab->splt == NULL
3075           || htab->sgotplt == NULL
3076           || htab->srelplt == NULL)
3077         abort ();
3078
3079       /* Calc. index no.
3080          Current offset - size first entry / entry size.  */
3081       plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3082
3083       /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3084          addr & GOT addr.  */
3085       got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3086
3087       /* Fill in the blueprint of a PLT.  */
3088       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3089                   htab->splt->contents + h->plt.offset);
3090       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3091                   htab->splt->contents + h->plt.offset + 4);
3092       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3093                   htab->splt->contents + h->plt.offset + 8);
3094       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3095                   htab->splt->contents + h->plt.offset + 12);
3096       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3097                   htab->splt->contents + h->plt.offset + 16);
3098       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3099                   htab->splt->contents + h->plt.offset + 20);
3100       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3101                   htab->splt->contents + h->plt.offset + 24);
3102       bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3103                   htab->splt->contents + h->plt.offset + 28);
3104       /* Fixup the relative address to the GOT entry */
3105       bfd_put_32 (output_bfd,
3106                   (htab->sgotplt->output_section->vma +
3107                    htab->sgotplt->output_offset + got_offset
3108                    - (htab->splt->output_section->vma + h->plt.offset))/2,
3109                   htab->splt->contents + h->plt.offset + 2);
3110       /* Fixup the relative branch to PLT 0 */
3111       bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3112                                  (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3113                   htab->splt->contents + h->plt.offset + 24);
3114       /* Fixup offset into symbol table */
3115       bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3116                   htab->splt->contents + h->plt.offset + 28);
3117
3118       /* Fill in the entry in the global offset table.
3119          Points to instruction after GOT offset.  */
3120       bfd_put_64 (output_bfd,
3121                   (htab->splt->output_section->vma
3122                    + htab->splt->output_offset
3123                    + h->plt.offset
3124                    + 14),
3125                   htab->sgotplt->contents + got_offset);
3126
3127       /* Fill in the entry in the .rela.plt section.  */
3128       rela.r_offset = (htab->sgotplt->output_section->vma
3129                        + htab->sgotplt->output_offset
3130                        + got_offset);
3131       rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3132       rela.r_addend = 0;
3133       loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3134       bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3135
3136       if (!h->def_regular)
3137         {
3138           /* Mark the symbol as undefined, rather than as defined in
3139              the .plt section.  Leave the value alone.  This is a clue
3140              for the dynamic linker, to make function pointer
3141              comparisons work between an application and shared
3142              library.  */
3143           sym->st_shndx = SHN_UNDEF;
3144         }
3145     }
3146
3147   if (h->got.offset != (bfd_vma) -1
3148       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3149       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3150       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3151     {
3152       Elf_Internal_Rela rela;
3153       bfd_byte *loc;
3154
3155       /* This symbol has an entry in the global offset table.  Set it
3156          up.  */
3157       if (htab->sgot == NULL || htab->srelgot == NULL)
3158         abort ();
3159
3160       rela.r_offset = (htab->sgot->output_section->vma
3161                        + htab->sgot->output_offset
3162                        + (h->got.offset &~ (bfd_vma) 1));
3163
3164       /* If this is a static link, or it is a -Bsymbolic link and the
3165          symbol is defined locally or was forced to be local because
3166          of a version file, we just want to emit a RELATIVE reloc.
3167          The entry in the global offset table will already have been
3168          initialized in the relocate_section function.  */
3169       if (info->shared
3170           && SYMBOL_REFERENCES_LOCAL (info, h))
3171         {
3172           if (!h->def_regular)
3173             return FALSE;
3174           BFD_ASSERT((h->got.offset & 1) != 0);
3175           rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3176           rela.r_addend = (h->root.u.def.value
3177                            + h->root.u.def.section->output_section->vma
3178                            + h->root.u.def.section->output_offset);
3179         }
3180       else
3181         {
3182           BFD_ASSERT((h->got.offset & 1) == 0);
3183           bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3184           rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3185           rela.r_addend = 0;
3186         }
3187
3188       loc = htab->srelgot->contents;
3189       loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3190       bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3191     }
3192
3193   if (h->needs_copy)
3194     {
3195       Elf_Internal_Rela rela;
3196       bfd_byte *loc;
3197
3198       /* This symbols needs a copy reloc.  Set it up.  */
3199
3200       if (h->dynindx == -1
3201           || (h->root.type != bfd_link_hash_defined
3202               && h->root.type != bfd_link_hash_defweak)
3203           || htab->srelbss == NULL)
3204         abort ();
3205
3206       rela.r_offset = (h->root.u.def.value
3207                        + h->root.u.def.section->output_section->vma
3208                        + h->root.u.def.section->output_offset);
3209       rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3210       rela.r_addend = 0;
3211       loc = htab->srelbss->contents;
3212       loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3213       bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3214     }
3215
3216   /* Mark some specially defined symbols as absolute.  */
3217   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3218       || h == htab->elf.hgot
3219       || h == htab->elf.hplt)
3220     sym->st_shndx = SHN_ABS;
3221
3222   return TRUE;
3223 }
3224
3225 /* Used to decide how to sort relocs in an optimal manner for the
3226    dynamic linker, before writing them out.  */
3227
3228 static enum elf_reloc_type_class
3229 elf_s390_reloc_type_class (rela)
3230      const Elf_Internal_Rela *rela;
3231 {
3232   switch ((int) ELF64_R_TYPE (rela->r_info))
3233     {
3234     case R_390_RELATIVE:
3235       return reloc_class_relative;
3236     case R_390_JMP_SLOT:
3237       return reloc_class_plt;
3238     case R_390_COPY:
3239       return reloc_class_copy;
3240     default:
3241       return reloc_class_normal;
3242     }
3243 }
3244
3245 /* Finish up the dynamic sections.  */
3246
3247 static bfd_boolean
3248 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3249                                   struct bfd_link_info *info)
3250 {
3251   struct elf_s390_link_hash_table *htab;
3252   bfd *dynobj;
3253   asection *sdyn;
3254
3255   htab = elf_s390_hash_table (info);
3256   if (htab == NULL)
3257     return FALSE;
3258
3259   dynobj = htab->elf.dynobj;
3260   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3261
3262   if (htab->elf.dynamic_sections_created)
3263     {
3264       Elf64_External_Dyn *dyncon, *dynconend;
3265
3266       if (sdyn == NULL || htab->sgot == NULL)
3267         abort ();
3268
3269       dyncon = (Elf64_External_Dyn *) sdyn->contents;
3270       dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3271       for (; dyncon < dynconend; dyncon++)
3272         {
3273           Elf_Internal_Dyn dyn;
3274           asection *s;
3275
3276           bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3277
3278           switch (dyn.d_tag)
3279             {
3280             default:
3281               continue;
3282
3283             case DT_PLTGOT:
3284               dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3285               break;
3286
3287             case DT_JMPREL:
3288               dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3289               break;
3290
3291             case DT_PLTRELSZ:
3292               s = htab->srelplt->output_section;
3293               dyn.d_un.d_val = s->size;
3294               break;
3295
3296             case DT_RELASZ:
3297               /* The procedure linkage table relocs (DT_JMPREL) should
3298                  not be included in the overall relocs (DT_RELA).
3299                  Therefore, we override the DT_RELASZ entry here to
3300                  make it not include the JMPREL relocs.  Since the
3301                  linker script arranges for .rela.plt to follow all
3302                  other relocation sections, we don't have to worry
3303                  about changing the DT_RELA entry.  */
3304               s = htab->srelplt->output_section;
3305               dyn.d_un.d_val -= s->size;
3306               break;
3307             }
3308
3309           bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3310         }
3311
3312       /* Fill in the special first entry in the procedure linkage table.  */
3313       if (htab->splt && htab->splt->size > 0)
3314         {
3315           /* fill in blueprint for plt 0 entry */
3316           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3317                       htab->splt->contents );
3318           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3319                       htab->splt->contents +4 );
3320           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3321                       htab->splt->contents +12 );
3322           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3323                       htab->splt->contents +16 );
3324           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3325                       htab->splt->contents +20 );
3326           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3327                       htab->splt->contents + 24);
3328           bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3329                       htab->splt->contents + 28 );
3330           /* Fixup relative address to start of GOT */
3331           bfd_put_32 (output_bfd,
3332                       (htab->sgotplt->output_section->vma +
3333                        htab->sgotplt->output_offset
3334                        - htab->splt->output_section->vma - 6)/2,
3335                       htab->splt->contents + 8);
3336         }
3337       elf_section_data (htab->splt->output_section)
3338         ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3339     }
3340
3341   if (htab->sgotplt)
3342     {
3343       /* Fill in the first three entries in the global offset table.  */
3344       if (htab->sgotplt->size > 0)
3345         {
3346           bfd_put_64 (output_bfd,
3347                       (sdyn == NULL ? (bfd_vma) 0
3348                        : sdyn->output_section->vma + sdyn->output_offset),
3349                       htab->sgotplt->contents);
3350           /* One entry for shared object struct ptr.  */
3351           bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3352           /* One entry for _dl_runtime_resolve.  */
3353           bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3354         }
3355
3356       elf_section_data (htab->sgot->output_section)
3357         ->this_hdr.sh_entsize = 8;
3358     }
3359   return TRUE;
3360 }
3361
3362 /* Return address for Ith PLT stub in section PLT, for relocation REL
3363    or (bfd_vma) -1 if it should not be included.  */
3364
3365 static bfd_vma
3366 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3367                       const arelent *rel ATTRIBUTE_UNUSED)
3368 {
3369   return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3370 }
3371
3372
3373 /* Why was the hash table entry size definition changed from
3374    ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3375    this is the only reason for the s390_elf64_size_info structure.  */
3376
3377 const struct elf_size_info s390_elf64_size_info =
3378 {
3379   sizeof (Elf64_External_Ehdr),
3380   sizeof (Elf64_External_Phdr),
3381   sizeof (Elf64_External_Shdr),
3382   sizeof (Elf64_External_Rel),
3383   sizeof (Elf64_External_Rela),
3384   sizeof (Elf64_External_Sym),
3385   sizeof (Elf64_External_Dyn),
3386   sizeof (Elf_External_Note),
3387   8,            /* hash-table entry size.  */
3388   1,            /* internal relocations per external relocations.  */
3389   64,           /* arch_size.  */
3390   3,            /* log_file_align.  */
3391   ELFCLASS64, EV_CURRENT,
3392   bfd_elf64_write_out_phdrs,
3393   bfd_elf64_write_shdrs_and_ehdr,
3394   bfd_elf64_checksum_contents,
3395   bfd_elf64_write_relocs,
3396   bfd_elf64_swap_symbol_in,
3397   bfd_elf64_swap_symbol_out,
3398   bfd_elf64_slurp_reloc_table,
3399   bfd_elf64_slurp_symbol_table,
3400   bfd_elf64_swap_dyn_in,
3401   bfd_elf64_swap_dyn_out,
3402   bfd_elf64_swap_reloc_in,
3403   bfd_elf64_swap_reloc_out,
3404   bfd_elf64_swap_reloca_in,
3405   bfd_elf64_swap_reloca_out
3406 };
3407
3408 #define TARGET_BIG_SYM  bfd_elf64_s390_vec
3409 #define TARGET_BIG_NAME "elf64-s390"
3410 #define ELF_ARCH        bfd_arch_s390
3411 #define ELF_TARGET_ID   S390_ELF_DATA
3412 #define ELF_MACHINE_CODE EM_S390
3413 #define ELF_MACHINE_ALT1 EM_S390_OLD
3414 #define ELF_MAXPAGESIZE 0x1000
3415
3416 #define elf_backend_size_info           s390_elf64_size_info
3417
3418 #define elf_backend_can_gc_sections     1
3419 #define elf_backend_can_refcount        1
3420 #define elf_backend_want_got_plt        1
3421 #define elf_backend_plt_readonly        1
3422 #define elf_backend_want_plt_sym        0
3423 #define elf_backend_got_header_size     24
3424 #define elf_backend_rela_normal         1
3425
3426 #define elf_info_to_howto               elf_s390_info_to_howto
3427
3428 #define bfd_elf64_bfd_is_local_label_name     elf_s390_is_local_label_name
3429 #define bfd_elf64_bfd_link_hash_table_create  elf_s390_link_hash_table_create
3430 #define bfd_elf64_bfd_reloc_type_lookup       elf_s390_reloc_type_lookup
3431 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3432
3433 #define elf_backend_adjust_dynamic_symbol     elf_s390_adjust_dynamic_symbol
3434 #define elf_backend_check_relocs              elf_s390_check_relocs
3435 #define elf_backend_copy_indirect_symbol      elf_s390_copy_indirect_symbol
3436 #define elf_backend_create_dynamic_sections   elf_s390_create_dynamic_sections
3437 #define elf_backend_finish_dynamic_sections   elf_s390_finish_dynamic_sections
3438 #define elf_backend_finish_dynamic_symbol     elf_s390_finish_dynamic_symbol
3439 #define elf_backend_gc_mark_hook              elf_s390_gc_mark_hook
3440 #define elf_backend_gc_sweep_hook             elf_s390_gc_sweep_hook
3441 #define elf_backend_reloc_type_class          elf_s390_reloc_type_class
3442 #define elf_backend_relocate_section          elf_s390_relocate_section
3443 #define elf_backend_size_dynamic_sections     elf_s390_size_dynamic_sections
3444 #define elf_backend_init_index_section        _bfd_elf_init_1_index_section
3445 #define elf_backend_reloc_type_class          elf_s390_reloc_type_class
3446 #define elf_backend_plt_sym_val               elf_s390_plt_sym_val
3447
3448 #define bfd_elf64_mkobject              elf_s390_mkobject
3449 #define elf_backend_object_p            elf_s390_object_p
3450
3451 #include "elf64-target.h"