bfd/elf64-sparc.c

   1 /* SPARC-specific support for 64-bit ELF
   2    Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
   3    Free Software Foundation, Inc.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "elf-bfd.h"
  25 #include "opcode/sparc.h"
  26
  27 /* This is defined if one wants to build upward compatible binaries
  28    with the original sparc64-elf toolchain.  The support is kept in for
  29    now but is turned off by default.  dje 970930  */
  30 /*#define SPARC64_OLD_RELOCS*/
  31
  32 #include "elf/sparc.h"
  33
  34 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value.  */
  35 #define MINUS_ONE (~ (bfd_vma) 0)
  36
  37 static struct bfd_link_hash_table * sparc64_elf_bfd_link_hash_table_create
  38   PARAMS((bfd *));
  39 static reloc_howto_type *sparc64_elf_reloc_type_lookup
  40   PARAMS ((bfd *, bfd_reloc_code_real_type));
  41 static void sparc64_elf_info_to_howto
  42   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
  43
  44 static void sparc64_elf_build_plt
  45   PARAMS((bfd *, unsigned char *, int));
  46 static bfd_vma sparc64_elf_plt_entry_offset
  47   PARAMS((int));
  48 static bfd_vma sparc64_elf_plt_ptr_offset
  49   PARAMS((int, int));
  50
  51 static boolean sparc64_elf_check_relocs
  52   PARAMS((bfd *, struct bfd_link_info *, asection *sec,
  53           const Elf_Internal_Rela *));
  54 static boolean sparc64_elf_adjust_dynamic_symbol
  55   PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *));
  56 static boolean sparc64_elf_size_dynamic_sections
  57   PARAMS((bfd *, struct bfd_link_info *));
  58 static int sparc64_elf_get_symbol_type
  59   PARAMS (( Elf_Internal_Sym *, int));
  60 static boolean sparc64_elf_add_symbol_hook
  61   PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
  62         const char **, flagword *, asection **, bfd_vma *));
  63 static void sparc64_elf_symbol_processing
  64   PARAMS ((bfd *, asymbol *));
  65
  66 static boolean sparc64_elf_copy_private_bfd_data
  67   PARAMS ((bfd *, bfd *));
  68 static boolean sparc64_elf_merge_private_bfd_data
  69   PARAMS ((bfd *, bfd *));
  70
  71 static boolean sparc64_elf_relax_section
  72   PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
  73 static boolean sparc64_elf_relocate_section
  74   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
  75            Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
  76 static boolean sparc64_elf_object_p PARAMS ((bfd *));
  77 static long sparc64_elf_get_reloc_upper_bound PARAMS ((bfd *, asection *));
  78 static long sparc64_elf_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
  79 static boolean sparc64_elf_slurp_one_reloc_table
  80   PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, asymbol **, boolean));
  81 static boolean sparc64_elf_slurp_reloc_table
  82   PARAMS ((bfd *, asection *, asymbol **, boolean));
  83 static long sparc64_elf_canonicalize_dynamic_reloc
  84   PARAMS ((bfd *, arelent **, asymbol **));
  85 static void sparc64_elf_write_relocs PARAMS ((bfd *, asection *, PTR));
  86 \f
  87 /* The relocation "howto" table.  */
  88
  89 static bfd_reloc_status_type sparc_elf_notsup_reloc
  90   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  91 static bfd_reloc_status_type sparc_elf_wdisp16_reloc
  92   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  93 static bfd_reloc_status_type sparc_elf_hix22_reloc
  94   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  95 static bfd_reloc_status_type sparc_elf_lox10_reloc
  96   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  97
  98 static reloc_howto_type sparc64_elf_howto_table[] =
  99 {
 100   HOWTO(R_SPARC_NONE,      0,0, 0,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_NONE",    false,0,0x00000000,true),
 101   HOWTO(R_SPARC_8,         0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_8",       false,0,0x000000ff,true),
 102   HOWTO(R_SPARC_16,        0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_16",      false,0,0x0000ffff,true),
 103   HOWTO(R_SPARC_32,        0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_32",      false,0,0xffffffff,true),
 104   HOWTO(R_SPARC_DISP8,     0,0, 8,true, 0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_DISP8",   false,0,0x000000ff,true),
 105   HOWTO(R_SPARC_DISP16,    0,1,16,true, 0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_DISP16",  false,0,0x0000ffff,true),
 106   HOWTO(R_SPARC_DISP32,    0,2,32,true, 0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_DISP32",  false,0,0x00ffffff,true),
 107   HOWTO(R_SPARC_WDISP30,   2,2,30,true, 0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_WDISP30", false,0,0x3fffffff,true),
 108   HOWTO(R_SPARC_WDISP22,   2,2,22,true, 0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_WDISP22", false,0,0x003fffff,true),
 109   HOWTO(R_SPARC_HI22,     10,2,22,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_HI22",    false,0,0x003fffff,true),
 110   HOWTO(R_SPARC_22,        0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_22",      false,0,0x003fffff,true),
 111   HOWTO(R_SPARC_13,        0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_13",      false,0,0x00001fff,true),
 112   HOWTO(R_SPARC_LO10,      0,2,10,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_LO10",    false,0,0x000003ff,true),
 113   HOWTO(R_SPARC_GOT10,     0,2,10,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_GOT10",   false,0,0x000003ff,true),
 114   HOWTO(R_SPARC_GOT13,     0,2,13,false,0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_GOT13",   false,0,0x00001fff,true),
 115   HOWTO(R_SPARC_GOT22,    10,2,22,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_GOT22",   false,0,0x003fffff,true),
 116   HOWTO(R_SPARC_PC10,      0,2,10,true, 0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_PC10",    false,0,0x000003ff,true),
 117   HOWTO(R_SPARC_PC22,     10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_PC22",    false,0,0x003fffff,true),
 118   HOWTO(R_SPARC_WPLT30,    2,2,30,true, 0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_WPLT30",  false,0,0x3fffffff,true),
 119   HOWTO(R_SPARC_COPY,      0,0,00,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_COPY",    false,0,0x00000000,true),
 120   HOWTO(R_SPARC_GLOB_DAT,  0,0,00,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_GLOB_DAT",false,0,0x00000000,true),
 121   HOWTO(R_SPARC_JMP_SLOT,  0,0,00,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_JMP_SLOT",false,0,0x00000000,true),
 122   HOWTO(R_SPARC_RELATIVE,  0,0,00,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_RELATIVE",false,0,0x00000000,true),
 123   HOWTO(R_SPARC_UA32,      0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_UA32",    false,0,0xffffffff,true),
 124 #ifndef SPARC64_OLD_RELOCS
 125   /* These aren't implemented yet.  */
 126   HOWTO(R_SPARC_PLT32,     0,0,00,false,0,complain_overflow_dont,    sparc_elf_notsup_reloc, "R_SPARC_PLT32",    false,0,0x00000000,true),
 127   HOWTO(R_SPARC_HIPLT22,   0,0,00,false,0,complain_overflow_dont,    sparc_elf_notsup_reloc, "R_SPARC_HIPLT22",  false,0,0x00000000,true),
 128   HOWTO(R_SPARC_LOPLT10,   0,0,00,false,0,complain_overflow_dont,    sparc_elf_notsup_reloc, "R_SPARC_LOPLT10",  false,0,0x00000000,true),
 129   HOWTO(R_SPARC_PCPLT32,   0,0,00,false,0,complain_overflow_dont,    sparc_elf_notsup_reloc, "R_SPARC_PCPLT32",  false,0,0x00000000,true),
 130   HOWTO(R_SPARC_PCPLT22,   0,0,00,false,0,complain_overflow_dont,    sparc_elf_notsup_reloc, "R_SPARC_PCPLT22",  false,0,0x00000000,true),
 131   HOWTO(R_SPARC_PCPLT10,   0,0,00,false,0,complain_overflow_dont,    sparc_elf_notsup_reloc, "R_SPARC_PCPLT10",  false,0,0x00000000,true),
 132 #endif
 133   HOWTO(R_SPARC_10,        0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_10",      false,0,0x000003ff,true),
 134   HOWTO(R_SPARC_11,        0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_11",      false,0,0x000007ff,true),
 135   HOWTO(R_SPARC_64,        0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_64",      false,0,MINUS_ONE, true),
 136   HOWTO(R_SPARC_OLO10,     0,2,13,false,0,complain_overflow_signed,  sparc_elf_notsup_reloc, "R_SPARC_OLO10",   false,0,0x00001fff,true),
 137   HOWTO(R_SPARC_HH22,     42,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc,  "R_SPARC_HH22",    false,0,0x003fffff,true),
 138   HOWTO(R_SPARC_HM10,     32,2,10,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_HM10",    false,0,0x000003ff,true),
 139   HOWTO(R_SPARC_LM22,     10,2,22,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_LM22",    false,0,0x003fffff,true),
 140   HOWTO(R_SPARC_PC_HH22,  42,2,22,true, 0,complain_overflow_unsigned,bfd_elf_generic_reloc,  "R_SPARC_PC_HH22",    false,0,0x003fffff,true),
 141   HOWTO(R_SPARC_PC_HM10,  32,2,10,true, 0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_PC_HM10",    false,0,0x000003ff,true),
 142   HOWTO(R_SPARC_PC_LM22,  10,2,22,true, 0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_PC_LM22",    false,0,0x003fffff,true),
 143   HOWTO(R_SPARC_WDISP16,   2,2,16,true, 0,complain_overflow_signed,  sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true),
 144   HOWTO(R_SPARC_WDISP19,   2,2,19,true, 0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_WDISP19", false,0,0x0007ffff,true),
 145   HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_UNUSED_42",false,0,0x00000000,true),
 146   HOWTO(R_SPARC_7,         0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_7",       false,0,0x0000007f,true),
 147   HOWTO(R_SPARC_5,         0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_5",       false,0,0x0000001f,true),
 148   HOWTO(R_SPARC_6,         0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_6",       false,0,0x0000003f,true),
 149   HOWTO(R_SPARC_DISP64,    0,4,64,true, 0,complain_overflow_signed,  bfd_elf_generic_reloc,  "R_SPARC_DISP64",  false,0,MINUS_ONE, true),
 150   HOWTO(R_SPARC_PLT64,     0,4,64,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_PLT64",   false,0,MINUS_ONE, false),
 151   HOWTO(R_SPARC_HIX22,     0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,  "R_SPARC_HIX22",   false,0,MINUS_ONE, false),
 152   HOWTO(R_SPARC_LOX10,     0,4, 0,false,0,complain_overflow_dont,    sparc_elf_lox10_reloc,  "R_SPARC_LOX10",   false,0,MINUS_ONE, false),
 153   HOWTO(R_SPARC_H44,      22,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc,  "R_SPARC_H44",     false,0,0x003fffff,false),
 154   HOWTO(R_SPARC_M44,      12,2,10,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_M44",     false,0,0x000003ff,false),
 155   HOWTO(R_SPARC_L44,       0,2,13,false,0,complain_overflow_dont,    bfd_elf_generic_reloc,  "R_SPARC_L44",     false,0,0x00000fff,false),
 156   HOWTO(R_SPARC_REGISTER,  0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",false,0,MINUS_ONE, false),
 157   HOWTO(R_SPARC_UA64,        0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_UA64",      false,0,MINUS_ONE, true),
 158   HOWTO(R_SPARC_UA16,        0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,  "R_SPARC_UA16",      false,0,0x0000ffff,true)
 159 };
 160
 161 struct elf_reloc_map {
 162   bfd_reloc_code_real_type bfd_reloc_val;
 163   unsigned char elf_reloc_val;
 164 };
 165
 166 static CONST struct elf_reloc_map sparc_reloc_map[] =
 167 {
 168   { BFD_RELOC_NONE, R_SPARC_NONE, },
 169   { BFD_RELOC_16, R_SPARC_16, },
 170   { BFD_RELOC_8, R_SPARC_8 },
 171   { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
 172   { BFD_RELOC_CTOR, R_SPARC_64 },
 173   { BFD_RELOC_32, R_SPARC_32 },
 174   { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
 175   { BFD_RELOC_HI22, R_SPARC_HI22 },
 176   { BFD_RELOC_LO10, R_SPARC_LO10, },
 177   { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
 178   { BFD_RELOC_SPARC22, R_SPARC_22 },
 179   { BFD_RELOC_SPARC13, R_SPARC_13 },
 180   { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
 181   { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
 182   { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
 183   { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
 184   { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
 185   { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
 186   { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
 187   { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
 188   { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
 189   { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
 190   { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
 191   /* ??? Doesn't dwarf use this?  */
 192 /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
 193   {BFD_RELOC_SPARC_10, R_SPARC_10},
 194   {BFD_RELOC_SPARC_11, R_SPARC_11},
 195   {BFD_RELOC_SPARC_64, R_SPARC_64},
 196   {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10},
 197   {BFD_RELOC_SPARC_HH22, R_SPARC_HH22},
 198   {BFD_RELOC_SPARC_HM10, R_SPARC_HM10},
 199   {BFD_RELOC_SPARC_LM22, R_SPARC_LM22},
 200   {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22},
 201   {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10},
 202   {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22},
 203   {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16},
 204   {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19},
 205   {BFD_RELOC_SPARC_7, R_SPARC_7},
 206   {BFD_RELOC_SPARC_5, R_SPARC_5},
 207   {BFD_RELOC_SPARC_6, R_SPARC_6},
 208   {BFD_RELOC_SPARC_DISP64, R_SPARC_DISP64},
 209   {BFD_RELOC_SPARC_PLT64, R_SPARC_PLT64},
 210   {BFD_RELOC_SPARC_HIX22, R_SPARC_HIX22},
 211   {BFD_RELOC_SPARC_LOX10, R_SPARC_LOX10},
 212   {BFD_RELOC_SPARC_H44, R_SPARC_H44},
 213   {BFD_RELOC_SPARC_M44, R_SPARC_M44},
 214   {BFD_RELOC_SPARC_L44, R_SPARC_L44},
 215   {BFD_RELOC_SPARC_REGISTER, R_SPARC_REGISTER}
 216 };
 217
 218 static reloc_howto_type *
 219 sparc64_elf_reloc_type_lookup (abfd, code)
 220      bfd *abfd ATTRIBUTE_UNUSED;
 221      bfd_reloc_code_real_type code;
 222 {
 223   unsigned int i;
 224   for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++)
 225     {
 226       if (sparc_reloc_map[i].bfd_reloc_val == code)
 227         return &sparc64_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val];
 228     }
 229   return 0;
 230 }
 231
 232 static void
 233 sparc64_elf_info_to_howto (abfd, cache_ptr, dst)
 234      bfd *abfd ATTRIBUTE_UNUSED;
 235      arelent *cache_ptr;
 236      Elf64_Internal_Rela *dst;
 237 {
 238   BFD_ASSERT (ELF64_R_TYPE_ID (dst->r_info) < (unsigned int) R_SPARC_max_std);
 239   cache_ptr->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (dst->r_info)];
 240 }
 241 \f
 242 /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA
 243    section can represent up to two relocs, we must tell the user to allocate
 244    more space.  */
 245
 246 static long
 247 sparc64_elf_get_reloc_upper_bound (abfd, sec)
 248      bfd *abfd ATTRIBUTE_UNUSED;
 249      asection *sec;
 250 {
 251   return (sec->reloc_count * 2 + 1) * sizeof (arelent *);
 252 }
 253
 254 static long
 255 sparc64_elf_get_dynamic_reloc_upper_bound (abfd)
 256      bfd *abfd;
 257 {
 258   return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2;
 259 }
 260
 261 /* Read  relocations for ASECT from REL_HDR.  There are RELOC_COUNT of
 262    them.  We cannot use generic elf routines for this,  because R_SPARC_OLO10
 263    has secondary addend in ELF64_R_TYPE_DATA.  We handle it as two relocations
 264    for the same location,  R_SPARC_LO10 and R_SPARC_13.  */
 265
 266 static boolean
 267 sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, dynamic)
 268      bfd *abfd;
 269      asection *asect;
 270      Elf_Internal_Shdr *rel_hdr;
 271      asymbol **symbols;
 272      boolean dynamic;
 273 {
 274   PTR allocated = NULL;
 275   bfd_byte *native_relocs;
 276   arelent *relent;
 277   unsigned int i;
 278   int entsize;
 279   bfd_size_type count;
 280   arelent *relents;
 281
 282   allocated = (PTR) bfd_malloc ((size_t) rel_hdr->sh_size);
 283   if (allocated == NULL)
 284     goto error_return;
 285
 286   if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
 287       || (bfd_read (allocated, 1, rel_hdr->sh_size, abfd)
 288           != rel_hdr->sh_size))
 289     goto error_return;
 290
 291   native_relocs = (bfd_byte *) allocated;
 292
 293   relents = asect->relocation + asect->reloc_count;
 294
 295   entsize = rel_hdr->sh_entsize;
 296   BFD_ASSERT (entsize == sizeof (Elf64_External_Rela));
 297
 298   count = rel_hdr->sh_size / entsize;
 299
 300   for (i = 0, relent = relents; i < count;
 301        i++, relent++, native_relocs += entsize)
 302     {
 303       Elf_Internal_Rela rela;
 304
 305       bfd_elf64_swap_reloca_in (abfd, (Elf64_External_Rela *) native_relocs, &rela);
 306
 307       /* The address of an ELF reloc is section relative for an object
 308          file, and absolute for an executable file or shared library.
 309          The address of a normal BFD reloc is always section relative,
 310          and the address of a dynamic reloc is absolute..  */
 311       if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
 312         relent->address = rela.r_offset;
 313       else
 314         relent->address = rela.r_offset - asect->vma;
 315
 316       if (ELF64_R_SYM (rela.r_info) == 0)
 317         relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 318       else
 319         {
 320           asymbol **ps, *s;
 321
 322           ps = symbols + ELF64_R_SYM (rela.r_info) - 1;
 323           s = *ps;
 324
 325           /* Canonicalize ELF section symbols.  FIXME: Why?  */
 326           if ((s->flags & BSF_SECTION_SYM) == 0)
 327             relent->sym_ptr_ptr = ps;
 328           else
 329             relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
 330         }
 331
 332       relent->addend = rela.r_addend;
 333
 334       BFD_ASSERT (ELF64_R_TYPE_ID (rela.r_info) < (unsigned int) R_SPARC_max_std);
 335       if (ELF64_R_TYPE_ID (rela.r_info) == R_SPARC_OLO10)
 336         {
 337           relent->howto = &sparc64_elf_howto_table[R_SPARC_LO10];
 338           relent[1].address = relent->address;
 339           relent++;
 340           relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 341           relent->addend = ELF64_R_TYPE_DATA (rela.r_info);
 342           relent->howto = &sparc64_elf_howto_table[R_SPARC_13];
 343         }
 344       else
 345         relent->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (rela.r_info)];
 346     }
 347
 348   asect->reloc_count += relent - relents;
 349
 350   if (allocated != NULL)
 351     free (allocated);
 352
 353   return true;
 354
 355  error_return:
 356   if (allocated != NULL)
 357     free (allocated);
 358   return false;
 359 }
 360
 361 /* Read in and swap the external relocs.  */
 362
 363 static boolean
 364 sparc64_elf_slurp_reloc_table (abfd, asect, symbols, dynamic)
 365      bfd *abfd;
 366      asection *asect;
 367      asymbol **symbols;
 368      boolean dynamic;
 369 {
 370   struct bfd_elf_section_data * const d = elf_section_data (asect);
 371   Elf_Internal_Shdr *rel_hdr;
 372   Elf_Internal_Shdr *rel_hdr2;
 373
 374   if (asect->relocation != NULL)
 375     return true;
 376
 377   if (! dynamic)
 378     {
 379       if ((asect->flags & SEC_RELOC) == 0
 380           || asect->reloc_count == 0)
 381         return true;
 382
 383       rel_hdr = &d->rel_hdr;
 384       rel_hdr2 = d->rel_hdr2;
 385
 386       BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
 387                   || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
 388     }
 389   else
 390     {
 391       /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
 392          case because relocations against this section may use the
 393          dynamic symbol table, and in that case bfd_section_from_shdr
 394          in elf.c does not update the RELOC_COUNT.  */
 395       if (asect->_raw_size == 0)
 396         return true;
 397
 398       rel_hdr = &d->this_hdr;
 399       asect->reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
 400       rel_hdr2 = NULL;
 401     }
 402
 403   asect->relocation = ((arelent *)
 404                        bfd_alloc (abfd,
 405                                   asect->reloc_count * 2 * sizeof (arelent)));
 406   if (asect->relocation == NULL)
 407     return false;
 408
 409   /* The sparc64_elf_slurp_one_reloc_table routine increments reloc_count.  */
 410   asect->reloc_count = 0;
 411
 412   if (!sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols,
 413                                           dynamic))
 414     return false;
 415
 416   if (rel_hdr2
 417       && !sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols,
 418                                              dynamic))
 419     return false;
 420
 421   return true;
 422 }
 423
 424 /* Canonicalize the dynamic relocation entries.  Note that we return
 425    the dynamic relocations as a single block, although they are
 426    actually associated with particular sections; the interface, which
 427    was designed for SunOS style shared libraries, expects that there
 428    is only one set of dynamic relocs.  Any section that was actually
 429    installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
 430    the dynamic symbol table, is considered to be a dynamic reloc
 431    section.  */
 432
 433 static long
 434 sparc64_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
 435      bfd *abfd;
 436      arelent **storage;
 437      asymbol **syms;
 438 {
 439   asection *s;
 440   long ret;
 441
 442   if (elf_dynsymtab (abfd) == 0)
 443     {
 444       bfd_set_error (bfd_error_invalid_operation);
 445       return -1;
 446     }
 447
 448   ret = 0;
 449   for (s = abfd->sections; s != NULL; s = s->next)
 450     {
 451       if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
 452           && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
 453         {
 454           arelent *p;
 455           long count, i;
 456
 457           if (! sparc64_elf_slurp_reloc_table (abfd, s, syms, true))
 458             return -1;
 459           count = s->reloc_count;
 460           p = s->relocation;
 461           for (i = 0; i < count; i++)
 462             *storage++ = p++;
 463           ret += count;
 464         }
 465     }
 466
 467   *storage = NULL;
 468
 469   return ret;
 470 }
 471
 472 /* Write out the relocs.  */
 473
 474 static void
 475 sparc64_elf_write_relocs (abfd, sec, data)
 476      bfd *abfd;
 477      asection *sec;
 478      PTR data;
 479 {
 480   boolean *failedp = (boolean *) data;
 481   Elf_Internal_Shdr *rela_hdr;
 482   Elf64_External_Rela *outbound_relocas, *src_rela;
 483   unsigned int idx, count;
 484   asymbol *last_sym = 0;
 485   int last_sym_idx = 0;
 486
 487   /* If we have already failed, don't do anything.  */
 488   if (*failedp)
 489     return;
 490
 491   if ((sec->flags & SEC_RELOC) == 0)
 492     return;
 493
 494   /* The linker backend writes the relocs out itself, and sets the
 495      reloc_count field to zero to inhibit writing them here.  Also,
 496      sometimes the SEC_RELOC flag gets set even when there aren't any
 497      relocs.  */
 498   if (sec->reloc_count == 0)
 499     return;
 500
 501   /* We can combine two relocs that refer to the same address
 502      into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the
 503      latter is R_SPARC_13 with no associated symbol.  */
 504   count = 0;
 505   for (idx = 0; idx < sec->reloc_count; idx++)
 506     {
 507       bfd_vma addr;
 508
 509       ++count;
 510
 511       addr = sec->orelocation[idx]->address;
 512       if (sec->orelocation[idx]->howto->type == R_SPARC_LO10
 513           && idx < sec->reloc_count - 1)
 514         {
 515           arelent *r = sec->orelocation[idx + 1];
 516
 517           if (r->howto->type == R_SPARC_13
 518               && r->address == addr
 519               && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
 520               && (*r->sym_ptr_ptr)->value == 0)
 521             ++idx;
 522         }
 523     }
 524
 525   rela_hdr = &elf_section_data (sec)->rel_hdr;
 526
 527   rela_hdr->sh_size = rela_hdr->sh_entsize * count;
 528   rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
 529   if (rela_hdr->contents == NULL)
 530     {
 531       *failedp = true;
 532       return;
 533     }
 534
 535   /* Figure out whether the relocations are RELA or REL relocations.  */
 536   if (rela_hdr->sh_type != SHT_RELA)
 537     abort ();
 538
 539   /* orelocation has the data, reloc_count has the count...  */
 540   outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents;
 541   src_rela = outbound_relocas;
 542
 543   for (idx = 0; idx < sec->reloc_count; idx++)
 544     {
 545       Elf_Internal_Rela dst_rela;
 546       arelent *ptr;
 547       asymbol *sym;
 548       int n;
 549
 550       ptr = sec->orelocation[idx];
 551
 552       /* The address of an ELF reloc is section relative for an object
 553          file, and absolute for an executable file or shared library.
 554          The address of a BFD reloc is always section relative.  */
 555       if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
 556         dst_rela.r_offset = ptr->address;
 557       else
 558         dst_rela.r_offset = ptr->address + sec->vma;
 559
 560       sym = *ptr->sym_ptr_ptr;
 561       if (sym == last_sym)
 562         n = last_sym_idx;
 563       else if (bfd_is_abs_section (sym->section) && sym->value == 0)
 564         n = STN_UNDEF;
 565       else
 566         {
 567           last_sym = sym;
 568           n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
 569           if (n < 0)
 570             {
 571               *failedp = true;
 572               return;
 573             }
 574           last_sym_idx = n;
 575         }
 576
 577       if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
 578           && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
 579           && ! _bfd_elf_validate_reloc (abfd, ptr))
 580         {
 581           *failedp = true;
 582           return;
 583         }
 584
 585       if (ptr->howto->type == R_SPARC_LO10
 586           && idx < sec->reloc_count - 1)
 587         {
 588           arelent *r = sec->orelocation[idx + 1];
 589
 590           if (r->howto->type == R_SPARC_13
 591               && r->address == ptr->address
 592               && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
 593               && (*r->sym_ptr_ptr)->value == 0)
 594             {
 595               idx++;
 596               dst_rela.r_info
 597                 = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend,
 598                                                       R_SPARC_OLO10));
 599             }
 600           else
 601             dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10);
 602         }
 603       else
 604         dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type);
 605
 606       dst_rela.r_addend = ptr->addend;
 607       bfd_elf64_swap_reloca_out (abfd, &dst_rela, src_rela);
 608       ++src_rela;
 609     }
 610 }
 611 \f
 612 /* Sparc64 ELF linker hash table.  */
 613
 614 struct sparc64_elf_app_reg
 615 {
 616   unsigned char bind;
 617   unsigned short shndx;
 618   bfd *abfd;
 619   char *name;
 620 };
 621
 622 struct sparc64_elf_link_hash_table
 623 {
 624   struct elf_link_hash_table root;
 625
 626   struct sparc64_elf_app_reg app_regs [4];
 627 };
 628
 629 /* Get the Sparc64 ELF linker hash table from a link_info structure.  */
 630
 631 #define sparc64_elf_hash_table(p) \
 632   ((struct sparc64_elf_link_hash_table *) ((p)->hash))
 633
 634 /* Create a Sparc64 ELF linker hash table.  */
 635
 636 static struct bfd_link_hash_table *
 637 sparc64_elf_bfd_link_hash_table_create (abfd)
 638      bfd *abfd;
 639 {
 640   struct sparc64_elf_link_hash_table *ret;
 641
 642   ret = ((struct sparc64_elf_link_hash_table *)
 643          bfd_zalloc (abfd, sizeof (struct sparc64_elf_link_hash_table)));
 644   if (ret == (struct sparc64_elf_link_hash_table *) NULL)
 645     return NULL;
 646
 647   if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
 648                                        _bfd_elf_link_hash_newfunc))
 649     {
 650       bfd_release (abfd, ret);
 651       return NULL;
 652     }
 653
 654   return &ret->root.root;
 655 }
 656 \f
 657 /* Utility for performing the standard initial work of an instruction
 658    relocation.
 659    *PRELOCATION will contain the relocated item.
 660    *PINSN will contain the instruction from the input stream.
 661    If the result is `bfd_reloc_other' the caller can continue with
 662    performing the relocation.  Otherwise it must stop and return the
 663    value to its caller.  */
 664
 665 static bfd_reloc_status_type
 666 init_insn_reloc (abfd,
 667                  reloc_entry,
 668                  symbol,
 669                  data,
 670                  input_section,
 671                  output_bfd,
 672                  prelocation,
 673                  pinsn)
 674      bfd *abfd;
 675      arelent *reloc_entry;
 676      asymbol *symbol;
 677      PTR data;
 678      asection *input_section;
 679      bfd *output_bfd;
 680      bfd_vma *prelocation;
 681      bfd_vma *pinsn;
 682 {
 683   bfd_vma relocation;
 684   reloc_howto_type *howto = reloc_entry->howto;
 685
 686   if (output_bfd != (bfd *) NULL
 687       && (symbol->flags & BSF_SECTION_SYM) == 0
 688       && (! howto->partial_inplace
 689           || reloc_entry->addend == 0))
 690     {
 691       reloc_entry->address += input_section->output_offset;
 692       return bfd_reloc_ok;
 693     }
 694
 695   /* This works because partial_inplace == false.  */
 696   if (output_bfd != NULL)
 697     return bfd_reloc_continue;
 698
 699   if (reloc_entry->address > input_section->_cooked_size)
 700     return bfd_reloc_outofrange;
 701
 702   relocation = (symbol->value
 703                 + symbol->section->output_section->vma
 704                 + symbol->section->output_offset);
 705   relocation += reloc_entry->addend;
 706   if (howto->pc_relative)
 707     {
 708       relocation -= (input_section->output_section->vma
 709                      + input_section->output_offset);
 710       relocation -= reloc_entry->address;
 711     }
 712
 713   *prelocation = relocation;
 714   *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
 715   return bfd_reloc_other;
 716 }
 717
 718 /* For unsupported relocs.  */
 719
 720 static bfd_reloc_status_type
 721 sparc_elf_notsup_reloc (abfd,
 722                         reloc_entry,
 723                         symbol,
 724                         data,
 725                         input_section,
 726                         output_bfd,
 727                         error_message)
 728      bfd *abfd ATTRIBUTE_UNUSED;
 729      arelent *reloc_entry ATTRIBUTE_UNUSED;
 730      asymbol *symbol ATTRIBUTE_UNUSED;
 731      PTR data ATTRIBUTE_UNUSED;
 732      asection *input_section ATTRIBUTE_UNUSED;
 733      bfd *output_bfd ATTRIBUTE_UNUSED;
 734      char **error_message ATTRIBUTE_UNUSED;
 735 {
 736   return bfd_reloc_notsupported;
 737 }
 738
 739 /* Handle the WDISP16 reloc.  */
 740
 741 static bfd_reloc_status_type
 742 sparc_elf_wdisp16_reloc (abfd, reloc_entry, symbol, data, input_section,
 743                          output_bfd, error_message)
 744      bfd *abfd;
 745      arelent *reloc_entry;
 746      asymbol *symbol;
 747      PTR data;
 748      asection *input_section;
 749      bfd *output_bfd;
 750      char **error_message ATTRIBUTE_UNUSED;
 751 {
 752   bfd_vma relocation;
 753   bfd_vma insn;
 754   bfd_reloc_status_type status;
 755
 756   status = init_insn_reloc (abfd, reloc_entry, symbol, data,
 757                             input_section, output_bfd, &relocation, &insn);
 758   if (status != bfd_reloc_other)
 759     return status;
 760
 761   insn = (insn & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6)
 762                                | ((relocation >> 2) & 0x3fff));
 763   bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
 764
 765   if ((bfd_signed_vma) relocation < - 0x40000
 766       || (bfd_signed_vma) relocation > 0x3ffff)
 767     return bfd_reloc_overflow;
 768   else
 769     return bfd_reloc_ok;
 770 }
 771
 772 /* Handle the HIX22 reloc.  */
 773
 774 static bfd_reloc_status_type
 775 sparc_elf_hix22_reloc (abfd,
 776                        reloc_entry,
 777                        symbol,
 778                        data,
 779                        input_section,
 780                        output_bfd,
 781                        error_message)
 782      bfd *abfd;
 783      arelent *reloc_entry;
 784      asymbol *symbol;
 785      PTR data;
 786      asection *input_section;
 787      bfd *output_bfd;
 788      char **error_message ATTRIBUTE_UNUSED;
 789 {
 790   bfd_vma relocation;
 791   bfd_vma insn;
 792   bfd_reloc_status_type status;
 793
 794   status = init_insn_reloc (abfd, reloc_entry, symbol, data,
 795                             input_section, output_bfd, &relocation, &insn);
 796   if (status != bfd_reloc_other)
 797     return status;
 798
 799   relocation ^= MINUS_ONE;
 800   insn = (insn & ~0x3fffff) | ((relocation >> 10) & 0x3fffff);
 801   bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
 802
 803   if ((relocation & ~ (bfd_vma) 0xffffffff) != 0)
 804     return bfd_reloc_overflow;
 805   else
 806     return bfd_reloc_ok;
 807 }
 808
 809 /* Handle the LOX10 reloc.  */
 810
 811 static bfd_reloc_status_type
 812 sparc_elf_lox10_reloc (abfd,
 813                        reloc_entry,
 814                        symbol,
 815                        data,
 816                        input_section,
 817                        output_bfd,
 818                        error_message)
 819      bfd *abfd;
 820      arelent *reloc_entry;
 821      asymbol *symbol;
 822      PTR data;
 823      asection *input_section;
 824      bfd *output_bfd;
 825      char **error_message ATTRIBUTE_UNUSED;
 826 {
 827   bfd_vma relocation;
 828   bfd_vma insn;
 829   bfd_reloc_status_type status;
 830
 831   status = init_insn_reloc (abfd, reloc_entry, symbol, data,
 832                             input_section, output_bfd, &relocation, &insn);
 833   if (status != bfd_reloc_other)
 834     return status;
 835
 836   insn = (insn & ~0x1fff) | 0x1c00 | (relocation & 0x3ff);
 837   bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
 838
 839   return bfd_reloc_ok;
 840 }
 841 \f
 842 /* PLT/GOT stuff */
 843
 844 /* Both the headers and the entries are icache aligned.  */
 845 #define PLT_ENTRY_SIZE          32
 846 #define PLT_HEADER_SIZE         (4 * PLT_ENTRY_SIZE)
 847 #define LARGE_PLT_THRESHOLD     32768
 848 #define GOT_RESERVED_ENTRIES    1
 849
 850 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1"
 851
 852 /* Fill in the .plt section.  */
 853
 854 static void
 855 sparc64_elf_build_plt (output_bfd, contents, nentries)
 856      bfd *output_bfd;
 857      unsigned char *contents;
 858      int nentries;
 859 {
 860   const unsigned int nop = 0x01000000;
 861   int i, j;
 862
 863   /* The first four entries are reserved, and are initially undefined.
 864      We fill them with `illtrap 0' to force ld.so to do something.  */
 865
 866   for (i = 0; i < PLT_HEADER_SIZE/4; ++i)
 867     bfd_put_32 (output_bfd, 0, contents+i*4);
 868
 869   /* The first 32768 entries are close enough to plt1 to get there via
 870      a straight branch.  */
 871
 872   for (i = 4; i < LARGE_PLT_THRESHOLD && i < nentries; ++i)
 873     {
 874       unsigned char *entry = contents + i * PLT_ENTRY_SIZE;
 875       unsigned int sethi, ba;
 876
 877       /* sethi (. - plt0), %g1 */
 878       sethi = 0x03000000 | (i * PLT_ENTRY_SIZE);
 879
 880       /* ba,a,pt %xcc, plt1 */
 881       ba = 0x30680000 | (((contents+PLT_ENTRY_SIZE) - (entry+4)) / 4 & 0x7ffff);
 882
 883       bfd_put_32 (output_bfd, sethi, entry);
 884       bfd_put_32 (output_bfd, ba, entry+4);
 885       bfd_put_32 (output_bfd, nop, entry+8);
 886       bfd_put_32 (output_bfd, nop, entry+12);
 887       bfd_put_32 (output_bfd, nop, entry+16);
 888       bfd_put_32 (output_bfd, nop, entry+20);
 889       bfd_put_32 (output_bfd, nop, entry+24);
 890       bfd_put_32 (output_bfd, nop, entry+28);
 891     }
 892
 893   /* Now the tricky bit.  Entries 32768 and higher are grouped in blocks of
 894      160: 160 entries and 160 pointers.  This is to separate code from data,
 895      which is much friendlier on the cache.  */
 896
 897   for (; i < nentries; i += 160)
 898     {
 899       int block = (i + 160 <= nentries ? 160 : nentries - i);
 900       for (j = 0; j < block; ++j)
 901         {
 902           unsigned char *entry, *ptr;
 903           unsigned int ldx;
 904
 905           entry = contents + i*PLT_ENTRY_SIZE + j*4*6;
 906           ptr = contents + i*PLT_ENTRY_SIZE + block*4*6 + j*8;
 907
 908           /* ldx [%o7 + ptr - entry+4], %g1 */
 909           ldx = 0xc25be000 | ((ptr - entry+4) & 0x1fff);
 910
 911           bfd_put_32 (output_bfd, 0x8a10000f, entry);    /* mov %o7,%g5 */
 912           bfd_put_32 (output_bfd, 0x40000002, entry+4);  /* call .+8 */
 913           bfd_put_32 (output_bfd, nop, entry+8);         /* nop */
 914           bfd_put_32 (output_bfd, ldx, entry+12);        /* ldx [%o7+P],%g1 */
 915           bfd_put_32 (output_bfd, 0x83c3c001, entry+16); /* jmpl %o7+%g1,%g1 */
 916           bfd_put_32 (output_bfd, 0x9e100005, entry+20); /* mov %g5,%o7 */
 917
 918           bfd_put_64 (output_bfd, contents - (entry+4), ptr);
 919         }
 920     }
 921 }
 922
 923 /* Return the offset of a particular plt entry within the .plt section.  */
 924
 925 static bfd_vma
 926 sparc64_elf_plt_entry_offset (index)
 927      int index;
 928 {
 929   int block, ofs;
 930
 931   if (index < LARGE_PLT_THRESHOLD)
 932     return index * PLT_ENTRY_SIZE;
 933
 934   /* See above for details.  */
 935
 936   block = (index - LARGE_PLT_THRESHOLD) / 160;
 937   ofs = (index - LARGE_PLT_THRESHOLD) % 160;
 938
 939   return ((bfd_vma) (LARGE_PLT_THRESHOLD + block*160) * PLT_ENTRY_SIZE
 940           + ofs * 6*4);
 941 }
 942
 943 static bfd_vma
 944 sparc64_elf_plt_ptr_offset (index, max)
 945      int index, max;
 946 {
 947   int block, ofs, last;
 948
 949   BFD_ASSERT(index >= LARGE_PLT_THRESHOLD);
 950
 951   /* See above for details.  */
 952
 953   block = (((index - LARGE_PLT_THRESHOLD) / 160) * 160)
 954           + LARGE_PLT_THRESHOLD;
 955   ofs = index - block;
 956   if (block + 160 > max)
 957     last = (max - LARGE_PLT_THRESHOLD) % 160;
 958   else
 959     last = 160;
 960
 961   return (block * PLT_ENTRY_SIZE
 962           + last * 6*4
 963           + ofs * 8);
 964 }
 965 \f
 966 /* Look through the relocs for a section during the first phase, and
 967    allocate space in the global offset table or procedure linkage
 968    table.  */
 969
 970 static boolean
 971 sparc64_elf_check_relocs (abfd, info, sec, relocs)
 972      bfd *abfd;
 973      struct bfd_link_info *info;
 974      asection *sec;
 975      const Elf_Internal_Rela *relocs;
 976 {
 977   bfd *dynobj;
 978   Elf_Internal_Shdr *symtab_hdr;
 979   struct elf_link_hash_entry **sym_hashes;
 980   bfd_vma *local_got_offsets;
 981   const Elf_Internal_Rela *rel;
 982   const Elf_Internal_Rela *rel_end;
 983   asection *sgot;
 984   asection *srelgot;
 985   asection *sreloc;
 986
 987   if (info->relocateable || !(sec->flags & SEC_ALLOC))
 988     return true;
 989
 990   dynobj = elf_hash_table (info)->dynobj;
 991   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
 992   sym_hashes = elf_sym_hashes (abfd);
 993   local_got_offsets = elf_local_got_offsets (abfd);
 994
 995   sgot = NULL;
 996   srelgot = NULL;
 997   sreloc = NULL;
 998
 999   rel_end = relocs + NUM_SHDR_ENTRIES (& elf_section_data (sec)->rel_hdr);
1000   for (rel = relocs; rel < rel_end; rel++)
1001     {
1002       unsigned long r_symndx;
1003       struct elf_link_hash_entry *h;
1004
1005       r_symndx = ELF64_R_SYM (rel->r_info);
1006       if (r_symndx < symtab_hdr->sh_info)
1007         h = NULL;
1008       else
1009         h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1010
1011       switch (ELF64_R_TYPE_ID (rel->r_info))
1012         {
1013         case R_SPARC_GOT10:
1014         case R_SPARC_GOT13:
1015         case R_SPARC_GOT22:
1016           /* This symbol requires a global offset table entry.  */
1017
1018           if (dynobj == NULL)
1019             {
1020               /* Create the .got section.  */
1021               elf_hash_table (info)->dynobj = dynobj = abfd;
1022               if (! _bfd_elf_create_got_section (dynobj, info))
1023                 return false;
1024             }
1025
1026           if (sgot == NULL)
1027             {
1028               sgot = bfd_get_section_by_name (dynobj, ".got");
1029               BFD_ASSERT (sgot != NULL);
1030             }
1031
1032           if (srelgot == NULL && (h != NULL || info->shared))
1033             {
1034               srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1035               if (srelgot == NULL)
1036                 {
1037                   srelgot = bfd_make_section (dynobj, ".rela.got");
1038                   if (srelgot == NULL
1039                       || ! bfd_set_section_flags (dynobj, srelgot,
1040                                                   (SEC_ALLOC
1041                                                    | SEC_LOAD
1042                                                    | SEC_HAS_CONTENTS
1043                                                    | SEC_IN_MEMORY
1044                                                    | SEC_LINKER_CREATED
1045                                                    | SEC_READONLY))
1046                       || ! bfd_set_section_alignment (dynobj, srelgot, 3))
1047                     return false;
1048                 }
1049             }
1050
1051           if (h != NULL)
1052             {
1053               if (h->got.offset != (bfd_vma) -1)
1054                 {
1055                   /* We have already allocated space in the .got.  */
1056                   break;
1057                 }
1058               h->got.offset = sgot->_raw_size;
1059
1060               /* Make sure this symbol is output as a dynamic symbol.  */
1061               if (h->dynindx == -1)
1062                 {
1063                   if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1064                     return false;
1065                 }
1066
1067               srelgot->_raw_size += sizeof (Elf64_External_Rela);
1068             }
1069           else
1070             {
1071               /* This is a global offset table entry for a local
1072                  symbol.  */
1073               if (local_got_offsets == NULL)
1074                 {
1075                   size_t size;
1076                   register unsigned int i;
1077
1078                   size = symtab_hdr->sh_info * sizeof (bfd_vma);
1079                   local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
1080                   if (local_got_offsets == NULL)
1081                     return false;
1082                   elf_local_got_offsets (abfd) = local_got_offsets;
1083                   for (i = 0; i < symtab_hdr->sh_info; i++)
1084                     local_got_offsets[i] = (bfd_vma) -1;
1085                 }
1086               if (local_got_offsets[r_symndx] != (bfd_vma) -1)
1087                 {
1088                   /* We have already allocated space in the .got.  */
1089                   break;
1090                 }
1091               local_got_offsets[r_symndx] = sgot->_raw_size;
1092
1093               if (info->shared)
1094                 {
1095                   /* If we are generating a shared object, we need to
1096                      output a R_SPARC_RELATIVE reloc so that the
1097                      dynamic linker can adjust this GOT entry.  */
1098                   srelgot->_raw_size += sizeof (Elf64_External_Rela);
1099                 }
1100             }
1101
1102           sgot->_raw_size += 8;
1103
1104 #if 0
1105           /* Doesn't work for 64-bit -fPIC, since sethi/or builds
1106              unsigned numbers.  If we permit ourselves to modify
1107              code so we get sethi/xor, this could work.
1108              Question: do we consider conditionally re-enabling
1109              this for -fpic, once we know about object code models?  */
1110           /* If the .got section is more than 0x1000 bytes, we add
1111              0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13
1112              bit relocations have a greater chance of working.  */
1113           if (sgot->_raw_size >= 0x1000
1114               && elf_hash_table (info)->hgot->root.u.def.value == 0)
1115             elf_hash_table (info)->hgot->root.u.def.value = 0x1000;
1116 #endif
1117
1118           break;
1119
1120         case R_SPARC_WPLT30:
1121         case R_SPARC_PLT32:
1122         case R_SPARC_HIPLT22:
1123         case R_SPARC_LOPLT10:
1124         case R_SPARC_PCPLT32:
1125         case R_SPARC_PCPLT22:
1126         case R_SPARC_PCPLT10:
1127         case R_SPARC_PLT64:
1128           /* This symbol requires a procedure linkage table entry.  We
1129              actually build the entry in adjust_dynamic_symbol,
1130              because this might be a case of linking PIC code without
1131              linking in any dynamic objects, in which case we don't
1132              need to generate a procedure linkage table after all.  */
1133
1134           if (h == NULL)
1135             {
1136               /* It does not make sense to have a procedure linkage
1137                  table entry for a local symbol.  */
1138               bfd_set_error (bfd_error_bad_value);
1139               return false;
1140             }
1141
1142           /* Make sure this symbol is output as a dynamic symbol.  */
1143           if (h->dynindx == -1)
1144             {
1145               if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1146                 return false;
1147             }
1148
1149           h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1150           break;
1151
1152         case R_SPARC_PC10:
1153         case R_SPARC_PC22:
1154         case R_SPARC_PC_HH22:
1155         case R_SPARC_PC_HM10:
1156         case R_SPARC_PC_LM22:
1157           if (h != NULL
1158               && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1159             break;
1160           /* Fall through.  */
1161         case R_SPARC_DISP8:
1162         case R_SPARC_DISP16:
1163         case R_SPARC_DISP32:
1164         case R_SPARC_DISP64:
1165         case R_SPARC_WDISP30:
1166         case R_SPARC_WDISP22:
1167         case R_SPARC_WDISP19:
1168         case R_SPARC_WDISP16:
1169           if (h == NULL)
1170             break;
1171           /* Fall through.  */
1172         case R_SPARC_8:
1173         case R_SPARC_16:
1174         case R_SPARC_32:
1175         case R_SPARC_HI22:
1176         case R_SPARC_22:
1177         case R_SPARC_13:
1178         case R_SPARC_LO10:
1179         case R_SPARC_UA32:
1180         case R_SPARC_10:
1181         case R_SPARC_11:
1182         case R_SPARC_64:
1183         case R_SPARC_OLO10:
1184         case R_SPARC_HH22:
1185         case R_SPARC_HM10:
1186         case R_SPARC_LM22:
1187         case R_SPARC_7:
1188         case R_SPARC_5:
1189         case R_SPARC_6:
1190         case R_SPARC_HIX22:
1191         case R_SPARC_LOX10:
1192         case R_SPARC_H44:
1193         case R_SPARC_M44:
1194         case R_SPARC_L44:
1195         case R_SPARC_UA64:
1196         case R_SPARC_UA16:
1197           /* When creating a shared object, we must copy these relocs
1198              into the output file.  We create a reloc section in
1199              dynobj and make room for the reloc.
1200
1201              But don't do this for debugging sections -- this shows up
1202              with DWARF2 -- first because they are not loaded, and
1203              second because DWARF sez the debug info is not to be
1204              biased by the load address.  */
1205           if (info->shared && (sec->flags & SEC_ALLOC))
1206             {
1207               if (sreloc == NULL)
1208                 {
1209                   const char *name;
1210
1211                   name = (bfd_elf_string_from_elf_section
1212                           (abfd,
1213                            elf_elfheader (abfd)->e_shstrndx,
1214                            elf_section_data (sec)->rel_hdr.sh_name));
1215                   if (name == NULL)
1216                     return false;
1217
1218                   BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1219                               && strcmp (bfd_get_section_name (abfd, sec),
1220                                          name + 5) == 0);
1221
1222                   sreloc = bfd_get_section_by_name (dynobj, name);
1223                   if (sreloc == NULL)
1224                     {
1225                       flagword flags;
1226
1227                       sreloc = bfd_make_section (dynobj, name);
1228                       flags = (SEC_HAS_CONTENTS | SEC_READONLY
1229                                | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1230                       if ((sec->flags & SEC_ALLOC) != 0)
1231                         flags |= SEC_ALLOC | SEC_LOAD;
1232                       if (sreloc == NULL
1233                           || ! bfd_set_section_flags (dynobj, sreloc, flags)
1234                           || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1235                         return false;
1236                     }
1237                 }
1238
1239               sreloc->_raw_size += sizeof (Elf64_External_Rela);
1240             }
1241           break;
1242
1243         case R_SPARC_REGISTER:
1244           /* Nothing to do.  */
1245           break;
1246
1247         default:
1248           (*_bfd_error_handler) (_("%s: check_relocs: unhandled reloc type %d"),
1249                                 bfd_get_filename(abfd),
1250                                 ELF64_R_TYPE_ID (rel->r_info));
1251           return false;
1252         }
1253     }
1254
1255   return true;
1256 }
1257
1258 /* Hook called by the linker routine which adds symbols from an object
1259    file.  We use it for STT_REGISTER symbols.  */
1260
1261 static boolean
1262 sparc64_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1263      bfd *abfd;
1264      struct bfd_link_info *info;
1265      const Elf_Internal_Sym *sym;
1266      const char **namep;
1267      flagword *flagsp ATTRIBUTE_UNUSED;
1268      asection **secp ATTRIBUTE_UNUSED;
1269      bfd_vma *valp ATTRIBUTE_UNUSED;
1270 {
1271   static char *stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" };
1272
1273   if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER)
1274     {
1275       int reg;
1276       struct sparc64_elf_app_reg *p;
1277
1278       reg = (int)sym->st_value;
1279       switch (reg & ~1)
1280         {
1281         case 2: reg -= 2; break;
1282         case 6: reg -= 4; break;
1283         default:
1284           (*_bfd_error_handler)
1285             (_("%s: Only registers %%g[2367] can be declared using STT_REGISTER"),
1286              bfd_get_filename (abfd));
1287           return false;
1288         }
1289
1290       if (info->hash->creator != abfd->xvec
1291           || (abfd->flags & DYNAMIC) != 0)
1292         {
1293           /* STT_REGISTER only works when linking an elf64_sparc object.
1294              If STT_REGISTER comes from a dynamic object, don't put it into
1295              the output bfd.  The dynamic linker will recheck it.  */
1296           *namep = NULL;
1297           return true;
1298         }
1299
1300       p = sparc64_elf_hash_table(info)->app_regs + reg;
1301
1302       if (p->name != NULL && strcmp (p->name, *namep))
1303         {
1304           (*_bfd_error_handler)
1305             (_("Register %%g%d used incompatibly: "
1306                "previously declared in %s to %s, in %s redefined to %s"),
1307              (int)sym->st_value,
1308              bfd_get_filename (p->abfd), *p->name ? p->name : "#scratch",
1309              bfd_get_filename (abfd), **namep ? *namep : "#scratch");
1310           return false;
1311         }
1312
1313       if (p->name == NULL)
1314         {
1315           if (**namep)
1316             {
1317               struct elf_link_hash_entry *h;
1318
1319               h = (struct elf_link_hash_entry *)
1320                 bfd_link_hash_lookup (info->hash, *namep, false, false, false);
1321
1322               if (h != NULL)
1323                 {
1324                   unsigned char type = h->type;
1325
1326                   if (type > STT_FUNC) type = 0;
1327                   (*_bfd_error_handler)
1328                     (_("Symbol `%s' has differing types: "
1329                        "previously %s, REGISTER in %s"),
1330                      *namep, stt_types [type], bfd_get_filename (abfd));
1331                   return false;
1332                 }
1333
1334               p->name = bfd_hash_allocate (&info->hash->table,
1335                                            strlen (*namep) + 1);
1336               if (!p->name)
1337                 return false;
1338
1339               strcpy (p->name, *namep);
1340             }
1341           else
1342             p->name = "";
1343           p->bind = ELF_ST_BIND (sym->st_info);
1344           p->abfd = abfd;
1345           p->shndx = sym->st_shndx;
1346         }
1347       else
1348         {
1349           if (p->bind == STB_WEAK
1350               && ELF_ST_BIND (sym->st_info) == STB_GLOBAL)
1351             {
1352               p->bind = STB_GLOBAL;
1353               p->abfd = abfd;
1354             }
1355         }
1356       *namep = NULL;
1357       return true;
1358     }
1359   else if (! *namep || ! **namep)
1360     return true;
1361   else
1362     {
1363       int i;
1364       struct sparc64_elf_app_reg *p;
1365
1366       p = sparc64_elf_hash_table(info)->app_regs;
1367       for (i = 0; i < 4; i++, p++)
1368         if (p->name != NULL && ! strcmp (p->name, *namep))
1369           {
1370             unsigned char type = ELF_ST_TYPE (sym->st_info);
1371
1372             if (type > STT_FUNC) type = 0;
1373             (*_bfd_error_handler)
1374               (_("Symbol `%s' has differing types: "
1375                  "REGISTER in %s, %s in %s"),
1376                *namep, bfd_get_filename (p->abfd), stt_types [type],
1377                bfd_get_filename (abfd));
1378             return false;
1379           }
1380     }
1381   return true;
1382 }
1383
1384 /* This function takes care of emiting STT_REGISTER symbols
1385    which we cannot easily keep in the symbol hash table.  */
1386
1387 static boolean
1388 sparc64_elf_output_arch_syms (output_bfd, info, finfo, func)
1389      bfd *output_bfd ATTRIBUTE_UNUSED;
1390      struct bfd_link_info *info;
1391      PTR finfo;
1392      boolean (*func) PARAMS ((PTR, const char *,
1393                               Elf_Internal_Sym *, asection *));
1394 {
1395   int reg;
1396   struct sparc64_elf_app_reg *app_regs =
1397     sparc64_elf_hash_table(info)->app_regs;
1398   Elf_Internal_Sym sym;
1399
1400   /* We arranged in size_dynamic_sections to put the STT_REGISTER entries
1401      at the end of the dynlocal list, so they came at the end of the local
1402      symbols in the symtab.  Except that they aren't STB_LOCAL, so we need
1403      to back up symtab->sh_info.  */
1404   if (elf_hash_table (info)->dynlocal)
1405     {
1406       bfd * dynobj = elf_hash_table (info)->dynobj;
1407       asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym");
1408       struct elf_link_local_dynamic_entry *e;
1409
1410       for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
1411         if (e->input_indx == -1)
1412           break;
1413       if (e)
1414         {
1415           elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
1416             = e->dynindx;
1417         }
1418     }
1419
1420   if (info->strip == strip_all)
1421     return true;
1422
1423   for (reg = 0; reg < 4; reg++)
1424     if (app_regs [reg].name != NULL)
1425       {
1426         if (info->strip == strip_some
1427             && bfd_hash_lookup (info->keep_hash,
1428                                 app_regs [reg].name,
1429                                 false, false) == NULL)
1430           continue;
1431
1432         sym.st_value = reg < 2 ? reg + 2 : reg + 4;
1433         sym.st_size = 0;
1434         sym.st_other = 0;
1435         sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER);
1436         sym.st_shndx = app_regs [reg].shndx;
1437         if (! (*func) (finfo, app_regs [reg].name, &sym,
1438                        sym.st_shndx == SHN_ABS
1439                          ? bfd_abs_section_ptr : bfd_und_section_ptr))
1440           return false;
1441       }
1442
1443   return true;
1444 }
1445
1446 static int
1447 sparc64_elf_get_symbol_type (elf_sym, type)
1448      Elf_Internal_Sym * elf_sym;
1449      int type;
1450 {
1451   if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER)
1452     return STT_REGISTER;
1453   else
1454     return type;
1455 }
1456
1457 /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL
1458    even in SHN_UNDEF section.  */
1459
1460 static void
1461 sparc64_elf_symbol_processing (abfd, asym)
1462      bfd *abfd ATTRIBUTE_UNUSED;
1463      asymbol *asym;
1464 {
1465   elf_symbol_type *elfsym;
1466
1467   elfsym = (elf_symbol_type *) asym;
1468   if (elfsym->internal_elf_sym.st_info
1469       == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER))
1470     {
1471       asym->flags |= BSF_GLOBAL;
1472     }
1473 }
1474
1475 /* Adjust a symbol defined by a dynamic object and referenced by a
1476    regular object.  The current definition is in some section of the
1477    dynamic object, but we're not including those sections.  We have to
1478    change the definition to something the rest of the link can
1479    understand.  */
1480
1481 static boolean
1482 sparc64_elf_adjust_dynamic_symbol (info, h)
1483      struct bfd_link_info *info;
1484      struct elf_link_hash_entry *h;
1485 {
1486   bfd *dynobj;
1487   asection *s;
1488   unsigned int power_of_two;
1489
1490   dynobj = elf_hash_table (info)->dynobj;
1491
1492   /* Make sure we know what is going on here.  */
1493   BFD_ASSERT (dynobj != NULL
1494               && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
1495                   || h->weakdef != NULL
1496                   || ((h->elf_link_hash_flags
1497                        & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1498                       && (h->elf_link_hash_flags
1499                           & ELF_LINK_HASH_REF_REGULAR) != 0
1500                       && (h->elf_link_hash_flags
1501                           & ELF_LINK_HASH_DEF_REGULAR) == 0)));
1502
1503   /* If this is a function, put it in the procedure linkage table.  We
1504      will fill in the contents of the procedure linkage table later
1505      (although we could actually do it here).  The STT_NOTYPE
1506      condition is a hack specifically for the Oracle libraries
1507      delivered for Solaris; for some inexplicable reason, they define
1508      some of their functions as STT_NOTYPE when they really should be
1509      STT_FUNC.  */
1510   if (h->type == STT_FUNC
1511       || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
1512       || (h->type == STT_NOTYPE
1513           && (h->root.type == bfd_link_hash_defined
1514               || h->root.type == bfd_link_hash_defweak)
1515           && (h->root.u.def.section->flags & SEC_CODE) != 0))
1516     {
1517       if (! elf_hash_table (info)->dynamic_sections_created)
1518         {
1519           /* This case can occur if we saw a WPLT30 reloc in an input
1520              file, but none of the input files were dynamic objects.
1521              In such a case, we don't actually need to build a
1522              procedure linkage table, and we can just do a WDISP30
1523              reloc instead.  */
1524           BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
1525           return true;
1526         }
1527
1528       s = bfd_get_section_by_name (dynobj, ".plt");
1529       BFD_ASSERT (s != NULL);
1530
1531       /* The first four bit in .plt is reserved.  */
1532       if (s->_raw_size == 0)
1533         s->_raw_size = PLT_HEADER_SIZE;
1534
1535       /* If this symbol is not defined in a regular file, and we are
1536          not generating a shared library, then set the symbol to this
1537          location in the .plt.  This is required to make function
1538          pointers compare as equal between the normal executable and
1539          the shared library.  */
1540       if (! info->shared
1541           && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1542         {
1543           h->root.u.def.section = s;
1544           h->root.u.def.value = s->_raw_size;
1545         }
1546
1547       /* To simplify matters later, just store the plt index here.  */
1548       h->plt.offset = s->_raw_size / PLT_ENTRY_SIZE;
1549
1550       /* Make room for this entry.  */
1551       s->_raw_size += PLT_ENTRY_SIZE;
1552
1553       /* We also need to make an entry in the .rela.plt section.  */
1554
1555       s = bfd_get_section_by_name (dynobj, ".rela.plt");
1556       BFD_ASSERT (s != NULL);
1557
1558       s->_raw_size += sizeof (Elf64_External_Rela);
1559
1560       /* The procedure linkage table size is bounded by the magnitude
1561          of the offset we can describe in the entry.  */
1562       if (s->_raw_size >= (bfd_vma)1 << 32)
1563         {
1564           bfd_set_error (bfd_error_bad_value);
1565           return false;
1566         }
1567
1568       return true;
1569     }
1570
1571   /* If this is a weak symbol, and there is a real definition, the
1572      processor independent code will have arranged for us to see the
1573      real definition first, and we can just use the same value.  */
1574   if (h->weakdef != NULL)
1575     {
1576       BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1577                   || h->weakdef->root.type == bfd_link_hash_defweak);
1578       h->root.u.def.section = h->weakdef->root.u.def.section;
1579       h->root.u.def.value = h->weakdef->root.u.def.value;
1580       return true;
1581     }
1582
1583   /* This is a reference to a symbol defined by a dynamic object which
1584      is not a function.  */
1585
1586   /* If we are creating a shared library, we must presume that the
1587      only references to the symbol are via the global offset table.
1588      For such cases we need not do anything here; the relocations will
1589      be handled correctly by relocate_section.  */
1590   if (info->shared)
1591     return true;
1592
1593   /* We must allocate the symbol in our .dynbss section, which will
1594      become part of the .bss section of the executable.  There will be
1595      an entry for this symbol in the .dynsym section.  The dynamic
1596      object will contain position independent code, so all references
1597      from the dynamic object to this symbol will go through the global
1598      offset table.  The dynamic linker will use the .dynsym entry to
1599      determine the address it must put in the global offset table, so
1600      both the dynamic object and the regular object will refer to the
1601      same memory location for the variable.  */
1602
1603   s = bfd_get_section_by_name (dynobj, ".dynbss");
1604   BFD_ASSERT (s != NULL);
1605
1606   /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker
1607      to copy the initial value out of the dynamic object and into the
1608      runtime process image.  We need to remember the offset into the
1609      .rel.bss section we are going to use.  */
1610   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1611     {
1612       asection *srel;
1613
1614       srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1615       BFD_ASSERT (srel != NULL);
1616       srel->_raw_size += sizeof (Elf64_External_Rela);
1617       h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1618     }
1619
1620   /* We need to figure out the alignment required for this symbol.  I
1621      have no idea how ELF linkers handle this.  16-bytes is the size
1622      of the largest type that requires hard alignment -- long double.  */
1623   power_of_two = bfd_log2 (h->size);
1624   if (power_of_two > 4)
1625     power_of_two = 4;
1626
1627   /* Apply the required alignment.  */
1628   s->_raw_size = BFD_ALIGN (s->_raw_size,
1629                             (bfd_size_type) (1 << power_of_two));
1630   if (power_of_two > bfd_get_section_alignment (dynobj, s))
1631     {
1632       if (! bfd_set_section_alignment (dynobj, s, power_of_two))
1633         return false;
1634     }
1635
1636   /* Define the symbol as being at this point in the section.  */
1637   h->root.u.def.section = s;
1638   h->root.u.def.value = s->_raw_size;
1639
1640   /* Increment the section size to make room for the symbol.  */
1641   s->_raw_size += h->size;
1642
1643   return true;
1644 }
1645
1646 /* Set the sizes of the dynamic sections.  */
1647
1648 static boolean
1649 sparc64_elf_size_dynamic_sections (output_bfd, info)
1650      bfd *output_bfd;
1651      struct bfd_link_info *info;
1652 {
1653   bfd *dynobj;
1654   asection *s;
1655   boolean reltext;
1656   boolean relplt;
1657
1658   dynobj = elf_hash_table (info)->dynobj;
1659   BFD_ASSERT (dynobj != NULL);
1660
1661   if (elf_hash_table (info)->dynamic_sections_created)
1662     {
1663       /* Set the contents of the .interp section to the interpreter.  */
1664       if (! info->shared)
1665         {
1666           s = bfd_get_section_by_name (dynobj, ".interp");
1667           BFD_ASSERT (s != NULL);
1668           s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1669           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1670         }
1671     }
1672   else
1673     {
1674       /* We may have created entries in the .rela.got section.
1675          However, if we are not creating the dynamic sections, we will
1676          not actually use these entries.  Reset the size of .rela.got,
1677          which will cause it to get stripped from the output file
1678          below.  */
1679       s = bfd_get_section_by_name (dynobj, ".rela.got");
1680       if (s != NULL)
1681         s->_raw_size = 0;
1682     }
1683
1684   /* The check_relocs and adjust_dynamic_symbol entry points have
1685      determined the sizes of the various dynamic sections.  Allocate
1686      memory for them.  */
1687   reltext = false;
1688   relplt = false;
1689   for (s = dynobj->sections; s != NULL; s = s->next)
1690     {
1691       const char *name;
1692       boolean strip;
1693
1694       if ((s->flags & SEC_LINKER_CREATED) == 0)
1695         continue;
1696
1697       /* It's OK to base decisions on the section name, because none
1698          of the dynobj section names depend upon the input files.  */
1699       name = bfd_get_section_name (dynobj, s);
1700
1701       strip = false;
1702
1703       if (strncmp (name, ".rela", 5) == 0)
1704         {
1705           if (s->_raw_size == 0)
1706             {
1707               /* If we don't need this section, strip it from the
1708                  output file.  This is to handle .rela.bss and
1709                  .rel.plt.  We must create it in
1710                  create_dynamic_sections, because it must be created
1711                  before the linker maps input sections to output
1712                  sections.  The linker does that before
1713                  adjust_dynamic_symbol is called, and it is that
1714                  function which decides whether anything needs to go
1715                  into these sections.  */
1716               strip = true;
1717             }
1718           else
1719             {
1720               const char *outname;
1721               asection *target;
1722
1723               /* If this relocation section applies to a read only
1724                  section, then we probably need a DT_TEXTREL entry.  */
1725               outname = bfd_get_section_name (output_bfd,
1726                                               s->output_section);
1727               target = bfd_get_section_by_name (output_bfd, outname + 5);
1728               if (target != NULL
1729                   && (target->flags & SEC_READONLY) != 0)
1730                 reltext = true;
1731
1732               if (strcmp (name, ".rela.plt") == 0)
1733                 relplt = true;
1734
1735               /* We use the reloc_count field as a counter if we need
1736                  to copy relocs into the output file.  */
1737               s->reloc_count = 0;
1738             }
1739         }
1740       else if (strcmp (name, ".plt") != 0
1741                && strncmp (name, ".got", 4) != 0)
1742         {
1743           /* It's not one of our sections, so don't allocate space.  */
1744           continue;
1745         }
1746
1747       if (strip)
1748         {
1749           _bfd_strip_section_from_output (info, s);
1750           continue;
1751         }
1752
1753       /* Allocate memory for the section contents.  Zero the memory
1754          for the benefit of .rela.plt, which has 4 unused entries
1755          at the beginning, and we don't want garbage.  */
1756       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1757       if (s->contents == NULL && s->_raw_size != 0)
1758         return false;
1759     }
1760
1761   if (elf_hash_table (info)->dynamic_sections_created)
1762     {
1763       /* Add some entries to the .dynamic section.  We fill in the
1764          values later, in sparc64_elf_finish_dynamic_sections, but we
1765          must add the entries now so that we get the correct size for
1766          the .dynamic section.  The DT_DEBUG entry is filled in by the
1767          dynamic linker and used by the debugger.  */
1768       int reg;
1769       struct sparc64_elf_app_reg * app_regs;
1770       struct bfd_strtab_hash *dynstr;
1771       struct elf_link_hash_table *eht = elf_hash_table (info);
1772
1773       if (! info->shared)
1774         {
1775           if (! bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0))
1776             return false;
1777         }
1778
1779       if (relplt)
1780         {
1781           if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0)
1782               || ! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0)
1783               || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
1784               || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0))
1785             return false;
1786         }
1787
1788       if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0)
1789           || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0)
1790           || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT,
1791                                             sizeof (Elf64_External_Rela)))
1792         return false;
1793
1794       if (reltext)
1795         {
1796           if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0))
1797             return false;
1798           info->flags |= DF_TEXTREL;
1799         }
1800
1801       /* Add dynamic STT_REGISTER symbols and corresponding DT_SPARC_REGISTER
1802          entries if needed.  */
1803       app_regs = sparc64_elf_hash_table (info)->app_regs;
1804       dynstr = eht->dynstr;
1805
1806       for (reg = 0; reg < 4; reg++)
1807         if (app_regs [reg].name != NULL)
1808           {
1809             struct elf_link_local_dynamic_entry *entry, *e;
1810
1811             if (! bfd_elf64_add_dynamic_entry (info, DT_SPARC_REGISTER, 0))
1812               return false;
1813
1814             entry = (struct elf_link_local_dynamic_entry *)
1815               bfd_hash_allocate (&info->hash->table, sizeof (*entry));
1816             if (entry == NULL)
1817               return false;
1818
1819             /* We cheat here a little bit: the symbol will not be local, so we
1820                put it at the end of the dynlocal linked list.  We will fix it
1821                later on, as we have to fix other fields anyway.  */
1822             entry->isym.st_value = reg < 2 ? reg + 2 : reg + 4;
1823             entry->isym.st_size = 0;
1824             if (*app_regs [reg].name != '\0')
1825               entry->isym.st_name
1826                 = _bfd_stringtab_add (dynstr, app_regs[reg].name, true, false);
1827             else
1828               entry->isym.st_name = 0;
1829             entry->isym.st_other = 0;
1830             entry->isym.st_info = ELF_ST_INFO (app_regs [reg].bind,
1831                                                STT_REGISTER);
1832             entry->isym.st_shndx = app_regs [reg].shndx;
1833             entry->next = NULL;
1834             entry->input_bfd = output_bfd;
1835             entry->input_indx = -1;
1836
1837             if (eht->dynlocal == NULL)
1838               eht->dynlocal = entry;
1839             else
1840               {
1841                 for (e = eht->dynlocal; e->next; e = e->next)
1842                   ;
1843                 e->next = entry;
1844               }
1845             eht->dynsymcount++;
1846           }
1847     }
1848
1849   return true;
1850 }
1851 \f
1852 #define SET_SEC_DO_RELAX(section) do { elf_section_data(section)->tdata = (void *)1; } while (0)
1853 #define SEC_DO_RELAX(section) (elf_section_data(section)->tdata == (void *)1)
1854
1855 static boolean
1856 sparc64_elf_relax_section (abfd, section, link_info, again)
1857      bfd *abfd ATTRIBUTE_UNUSED;
1858      asection *section ATTRIBUTE_UNUSED;
1859      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
1860      boolean *again;
1861 {
1862   *again = false;
1863   SET_SEC_DO_RELAX (section);
1864   return true;
1865 }
1866 \f
1867 /* Relocate a SPARC64 ELF section.  */
1868
1869 static boolean
1870 sparc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1871                               contents, relocs, local_syms, local_sections)
1872      bfd *output_bfd;
1873      struct bfd_link_info *info;
1874      bfd *input_bfd;
1875      asection *input_section;
1876      bfd_byte *contents;
1877      Elf_Internal_Rela *relocs;
1878      Elf_Internal_Sym *local_syms;
1879      asection **local_sections;
1880 {
1881   bfd *dynobj;
1882   Elf_Internal_Shdr *symtab_hdr;
1883   struct elf_link_hash_entry **sym_hashes;
1884   bfd_vma *local_got_offsets;
1885   bfd_vma got_base;
1886   asection *sgot;
1887   asection *splt;
1888   asection *sreloc;
1889   Elf_Internal_Rela *rel;
1890   Elf_Internal_Rela *relend;
1891
1892   dynobj = elf_hash_table (info)->dynobj;
1893   symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1894   sym_hashes = elf_sym_hashes (input_bfd);
1895   local_got_offsets = elf_local_got_offsets (input_bfd);
1896
1897   if (elf_hash_table(info)->hgot == NULL)
1898     got_base = 0;
1899   else
1900     got_base = elf_hash_table (info)->hgot->root.u.def.value;
1901
1902   sgot = splt = sreloc = NULL;
1903
1904   rel = relocs;
1905   relend = relocs + NUM_SHDR_ENTRIES (& elf_section_data (input_section)->rel_hdr);
1906   for (; rel < relend; rel++)
1907     {
1908       int r_type;
1909       reloc_howto_type *howto;
1910       unsigned long r_symndx;
1911       struct elf_link_hash_entry *h;
1912       Elf_Internal_Sym *sym;
1913       asection *sec;
1914       bfd_vma relocation;
1915       bfd_reloc_status_type r;
1916
1917       r_type = ELF64_R_TYPE_ID (rel->r_info);
1918       if (r_type < 0 || r_type >= (int) R_SPARC_max_std)
1919         {
1920           bfd_set_error (bfd_error_bad_value);
1921           return false;
1922         }
1923       howto = sparc64_elf_howto_table + r_type;
1924
1925       r_symndx = ELF64_R_SYM (rel->r_info);
1926
1927       if (info->relocateable)
1928         {
1929           /* This is a relocateable link.  We don't have to change
1930              anything, unless the reloc is against a section symbol,
1931              in which case we have to adjust according to where the
1932              section symbol winds up in the output section.  */
1933           if (r_symndx < symtab_hdr->sh_info)
1934             {
1935               sym = local_syms + r_symndx;
1936               if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1937                 {
1938                   sec = local_sections[r_symndx];
1939                   rel->r_addend += sec->output_offset + sym->st_value;
1940                 }
1941             }
1942
1943           continue;
1944         }
1945
1946       /* This is a final link.  */
1947       h = NULL;
1948       sym = NULL;
1949       sec = NULL;
1950       if (r_symndx < symtab_hdr->sh_info)
1951         {
1952           sym = local_syms + r_symndx;
1953           sec = local_sections[r_symndx];
1954           relocation = (sec->output_section->vma
1955                         + sec->output_offset
1956                         + sym->st_value);
1957         }
1958       else
1959         {
1960           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1961           while (h->root.type == bfd_link_hash_indirect
1962                  || h->root.type == bfd_link_hash_warning)
1963             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1964           if (h->root.type == bfd_link_hash_defined
1965               || h->root.type == bfd_link_hash_defweak)
1966             {
1967               boolean skip_it = false;
1968               sec = h->root.u.def.section;
1969
1970               switch (r_type)
1971                 {
1972                 case R_SPARC_WPLT30:
1973                 case R_SPARC_PLT32:
1974                 case R_SPARC_HIPLT22:
1975                 case R_SPARC_LOPLT10:
1976                 case R_SPARC_PCPLT32:
1977                 case R_SPARC_PCPLT22:
1978                 case R_SPARC_PCPLT10:
1979                 case R_SPARC_PLT64:
1980                   if (h->plt.offset != (bfd_vma) -1)
1981                     skip_it = true;
1982                   break;
1983
1984                 case R_SPARC_GOT10:
1985                 case R_SPARC_GOT13:
1986                 case R_SPARC_GOT22:
1987                   if (elf_hash_table(info)->dynamic_sections_created
1988                       && (!info->shared
1989                           || (!info->symbolic && h->dynindx != -1)
1990                           || !(h->elf_link_hash_flags
1991                                & ELF_LINK_HASH_DEF_REGULAR)))
1992                     skip_it = true;
1993                   break;
1994
1995                 case R_SPARC_PC10:
1996                 case R_SPARC_PC22:
1997                 case R_SPARC_PC_HH22:
1998                 case R_SPARC_PC_HM10:
1999                 case R_SPARC_PC_LM22:
2000                   if (!strcmp(h->root.root.string, "_GLOBAL_OFFSET_TABLE_"))
2001                     break;
2002                   /* FALLTHRU */
2003
2004                 case R_SPARC_8:
2005                 case R_SPARC_16:
2006                 case R_SPARC_32:
2007                 case R_SPARC_DISP8:
2008                 case R_SPARC_DISP16:
2009                 case R_SPARC_DISP32:
2010                 case R_SPARC_WDISP30:
2011                 case R_SPARC_WDISP22:
2012                 case R_SPARC_HI22:
2013                 case R_SPARC_22:
2014                 case R_SPARC_13:
2015                 case R_SPARC_LO10:
2016                 case R_SPARC_UA32:
2017                 case R_SPARC_10:
2018                 case R_SPARC_11:
2019                 case R_SPARC_64:
2020                 case R_SPARC_OLO10:
2021                 case R_SPARC_HH22:
2022                 case R_SPARC_HM10:
2023                 case R_SPARC_LM22:
2024                 case R_SPARC_WDISP19:
2025                 case R_SPARC_WDISP16:
2026                 case R_SPARC_7:
2027                 case R_SPARC_5:
2028                 case R_SPARC_6:
2029                 case R_SPARC_DISP64:
2030                 case R_SPARC_HIX22:
2031                 case R_SPARC_LOX10:
2032                 case R_SPARC_H44:
2033                 case R_SPARC_M44:
2034                 case R_SPARC_L44:
2035                 case R_SPARC_UA64:
2036                 case R_SPARC_UA16:
2037                   if (info->shared
2038                       && ((!info->symbolic && h->dynindx != -1)
2039                           || !(h->elf_link_hash_flags
2040                                & ELF_LINK_HASH_DEF_REGULAR)))
2041                     skip_it = true;
2042                   break;
2043                 }
2044
2045               if (skip_it)
2046                 {
2047                   /* In these cases, we don't need the relocation
2048                      value.  We check specially because in some
2049                      obscure cases sec->output_section will be NULL.  */
2050                   relocation = 0;
2051                 }
2052               else
2053                 {
2054                   relocation = (h->root.u.def.value
2055                                 + sec->output_section->vma
2056                                 + sec->output_offset);
2057                 }
2058             }
2059           else if (h->root.type == bfd_link_hash_undefweak)
2060             relocation = 0;
2061           else if (info->shared && !info->symbolic
2062                    && !info->no_undefined
2063                    && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2064             relocation = 0;
2065           else
2066             {
2067               if (! ((*info->callbacks->undefined_symbol)
2068                      (info, h->root.root.string, input_bfd,
2069                       input_section, rel->r_offset,
2070                       (!info->shared || info->no_undefined
2071                        || ELF_ST_VISIBILITY (h->other)))))
2072                 return false;
2073
2074               /* To avoid generating warning messages about truncated
2075                  relocations, set the relocation's address to be the same as
2076                  the start of this section.  */
2077
2078               if (input_section->output_section != NULL)
2079                 relocation = input_section->output_section->vma;
2080               else
2081                 relocation = 0;
2082             }
2083         }
2084
2085       /* When generating a shared object, these relocations are copied
2086          into the output file to be resolved at run time.  */
2087       if (info->shared && (input_section->flags & SEC_ALLOC))
2088         {
2089           switch (r_type)
2090             {
2091             case R_SPARC_PC10:
2092             case R_SPARC_PC22:
2093             case R_SPARC_PC_HH22:
2094             case R_SPARC_PC_HM10:
2095             case R_SPARC_PC_LM22:
2096               if (h != NULL
2097                   && !strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_"))
2098                 break;
2099               /* Fall through.  */
2100             case R_SPARC_DISP8:
2101             case R_SPARC_DISP16:
2102             case R_SPARC_DISP32:
2103             case R_SPARC_WDISP30:
2104             case R_SPARC_WDISP22:
2105             case R_SPARC_WDISP19:
2106             case R_SPARC_WDISP16:
2107             case R_SPARC_DISP64:
2108               if (h == NULL)
2109                 break;
2110               /* Fall through.  */
2111             case R_SPARC_8:
2112             case R_SPARC_16:
2113             case R_SPARC_32:
2114             case R_SPARC_HI22:
2115             case R_SPARC_22:
2116             case R_SPARC_13:
2117             case R_SPARC_LO10:
2118             case R_SPARC_UA32:
2119             case R_SPARC_10:
2120             case R_SPARC_11:
2121             case R_SPARC_64:
2122             case R_SPARC_OLO10:
2123             case R_SPARC_HH22:
2124             case R_SPARC_HM10:
2125             case R_SPARC_LM22:
2126             case R_SPARC_7:
2127             case R_SPARC_5:
2128             case R_SPARC_6:
2129             case R_SPARC_HIX22:
2130             case R_SPARC_LOX10:
2131             case R_SPARC_H44:
2132             case R_SPARC_M44:
2133             case R_SPARC_L44:
2134             case R_SPARC_UA64:
2135             case R_SPARC_UA16:
2136               {
2137                 Elf_Internal_Rela outrel;
2138                 boolean skip;
2139
2140                 if (sreloc == NULL)
2141                   {
2142                     const char *name =
2143                       (bfd_elf_string_from_elf_section
2144                        (input_bfd,
2145                         elf_elfheader (input_bfd)->e_shstrndx,
2146                         elf_section_data (input_section)->rel_hdr.sh_name));
2147
2148                     if (name == NULL)
2149                       return false;
2150
2151                     BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2152                                 && strcmp (bfd_get_section_name(input_bfd,
2153                                                                 input_section),
2154                                            name + 5) == 0);
2155
2156                     sreloc = bfd_get_section_by_name (dynobj, name);
2157                     BFD_ASSERT (sreloc != NULL);
2158                   }
2159
2160                 skip = false;
2161
2162                 if (elf_section_data (input_section)->stab_info == NULL)
2163                   outrel.r_offset = rel->r_offset;
2164                 else
2165                   {
2166                     bfd_vma off;
2167
2168                     off = (_bfd_stab_section_offset
2169                            (output_bfd, &elf_hash_table (info)->stab_info,
2170                             input_section,
2171                             &elf_section_data (input_section)->stab_info,
2172                             rel->r_offset));
2173                     if (off == MINUS_ONE)
2174                       skip = true;
2175                     outrel.r_offset = off;
2176                   }
2177
2178                 outrel.r_offset += (input_section->output_section->vma
2179                                     + input_section->output_offset);
2180
2181                 /* Optimize unaligned reloc usage now that we know where
2182                    it finally resides.  */
2183                 switch (r_type)
2184                   {
2185                   case R_SPARC_16:
2186                     if (outrel.r_offset & 1) r_type = R_SPARC_UA16;
2187                     break;
2188                   case R_SPARC_UA16:
2189                     if (!(outrel.r_offset & 1)) r_type = R_SPARC_16;
2190                     break;
2191                   case R_SPARC_32:
2192                     if (outrel.r_offset & 3) r_type = R_SPARC_UA32;
2193                     break;
2194                   case R_SPARC_UA32:
2195                     if (!(outrel.r_offset & 3)) r_type = R_SPARC_32;
2196                     break;
2197                   case R_SPARC_64:
2198                     if (outrel.r_offset & 7) r_type = R_SPARC_UA64;
2199                     break;
2200                   case R_SPARC_UA64:
2201                     if (!(outrel.r_offset & 7)) r_type = R_SPARC_64;
2202                     break;
2203                   }
2204
2205                 if (skip)
2206                   memset (&outrel, 0, sizeof outrel);
2207                 /* h->dynindx may be -1 if the symbol was marked to
2208                    become local.  */
2209                 else if (h != NULL
2210                          && ((! info->symbolic && h->dynindx != -1)
2211                              || (h->elf_link_hash_flags
2212                                  & ELF_LINK_HASH_DEF_REGULAR) == 0))
2213                   {
2214                     BFD_ASSERT (h->dynindx != -1);
2215                     outrel.r_info
2216                       = ELF64_R_INFO (h->dynindx,
2217                                       ELF64_R_TYPE_INFO (
2218                                         ELF64_R_TYPE_DATA (rel->r_info),
2219                                                            r_type));
2220                     outrel.r_addend = rel->r_addend;
2221                   }
2222                 else
2223                   {
2224                     if (r_type == R_SPARC_64)
2225                       {
2226                         outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2227                         outrel.r_addend = relocation + rel->r_addend;
2228                       }
2229                     else
2230                       {
2231                         long indx;
2232
2233                         if (h == NULL)
2234                           sec = local_sections[r_symndx];
2235                         else
2236                           {
2237                             BFD_ASSERT (h->root.type == bfd_link_hash_defined
2238                                         || (h->root.type
2239                                             == bfd_link_hash_defweak));
2240                             sec = h->root.u.def.section;
2241                           }
2242                         if (sec != NULL && bfd_is_abs_section (sec))
2243                           indx = 0;
2244                         else if (sec == NULL || sec->owner == NULL)
2245                           {
2246                             bfd_set_error (bfd_error_bad_value);
2247                             return false;
2248                           }
2249                         else
2250                           {
2251                             asection *osec;
2252
2253                             osec = sec->output_section;
2254                             indx = elf_section_data (osec)->dynindx;
2255
2256                             /* FIXME: we really should be able to link non-pic
2257                                shared libraries.  */
2258                             if (indx == 0)
2259                               {
2260                                 BFD_FAIL ();
2261                                 (*_bfd_error_handler)
2262                                   (_("%s: probably compiled without -fPIC?"),
2263                                    bfd_get_filename (input_bfd));
2264                                 bfd_set_error (bfd_error_bad_value);
2265                                 return false;
2266                               }
2267                           }
2268
2269                         outrel.r_info
2270                           = ELF64_R_INFO (indx,
2271                                           ELF64_R_TYPE_INFO (
2272                                             ELF64_R_TYPE_DATA (rel->r_info),
2273                                                                r_type));
2274                         outrel.r_addend = relocation + rel->r_addend;
2275                       }
2276                   }
2277
2278                 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
2279                                            (((Elf64_External_Rela *)
2280                                              sreloc->contents)
2281                                             + sreloc->reloc_count));
2282                 ++sreloc->reloc_count;
2283
2284                 /* This reloc will be computed at runtime, so there's no
2285                    need to do anything now, unless this is a RELATIVE
2286                    reloc in an unallocated section.  */
2287                 if (skip
2288                     || (input_section->flags & SEC_ALLOC) != 0
2289                     || ELF64_R_TYPE_ID (outrel.r_info) != R_SPARC_RELATIVE)
2290                   continue;
2291               }
2292             break;
2293             }
2294         }
2295
2296       switch (r_type)
2297         {
2298         case R_SPARC_GOT10:
2299         case R_SPARC_GOT13:
2300         case R_SPARC_GOT22:
2301           /* Relocation is to the entry for this symbol in the global
2302              offset table.  */
2303           if (sgot == NULL)
2304             {
2305               sgot = bfd_get_section_by_name (dynobj, ".got");
2306               BFD_ASSERT (sgot != NULL);
2307             }
2308
2309           if (h != NULL)
2310             {
2311               bfd_vma off = h->got.offset;
2312               BFD_ASSERT (off != (bfd_vma) -1);
2313
2314               if (! elf_hash_table (info)->dynamic_sections_created
2315                   || (info->shared
2316                       && (info->symbolic || h->dynindx == -1)
2317                       && (h->elf_link_hash_flags
2318                           & ELF_LINK_HASH_DEF_REGULAR)))
2319                 {
2320                   /* This is actually a static link, or it is a -Bsymbolic
2321                      link and the symbol is defined locally, or the symbol
2322                      was forced to be local because of a version file.  We
2323                      must initialize this entry in the global offset table.
2324                      Since the offset must always be a multiple of 8, we
2325                      use the least significant bit to record whether we
2326                      have initialized it already.
2327
2328                      When doing a dynamic link, we create a .rela.got
2329                      relocation entry to initialize the value.  This is
2330                      done in the finish_dynamic_symbol routine.  */
2331
2332                   if ((off & 1) != 0)
2333                     off &= ~1;
2334                   else
2335                     {
2336                       bfd_put_64 (output_bfd, relocation,
2337                                   sgot->contents + off);
2338                       h->got.offset |= 1;
2339                     }
2340                 }
2341               relocation = sgot->output_offset + off - got_base;
2342             }
2343           else
2344             {
2345               bfd_vma off;
2346
2347               BFD_ASSERT (local_got_offsets != NULL);
2348               off = local_got_offsets[r_symndx];
2349               BFD_ASSERT (off != (bfd_vma) -1);
2350
2351               /* The offset must always be a multiple of 8.  We use
2352                  the least significant bit to record whether we have
2353                  already processed this entry.  */
2354               if ((off & 1) != 0)
2355                 off &= ~1;
2356               else
2357                 {
2358                   local_got_offsets[r_symndx] |= 1;
2359
2360                   if (info->shared)
2361                     {
2362                       asection *srelgot;
2363                       Elf_Internal_Rela outrel;
2364
2365                       /* The Solaris 2.7 64-bit linker adds the contents
2366                          of the location to the value of the reloc.
2367                          Note this is different behaviour to the
2368                          32-bit linker, which both adds the contents
2369                          and ignores the addend.  So clear the location.  */
2370                       bfd_put_64 (output_bfd, 0, sgot->contents + off);
2371
2372                       /* We need to generate a R_SPARC_RELATIVE reloc
2373                          for the dynamic linker.  */
2374                       srelgot = bfd_get_section_by_name(dynobj, ".rela.got");
2375                       BFD_ASSERT (srelgot != NULL);
2376
2377                       outrel.r_offset = (sgot->output_section->vma
2378                                          + sgot->output_offset
2379                                          + off);
2380                       outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2381                       outrel.r_addend = relocation;
2382                       bfd_elf64_swap_reloca_out (output_bfd, &outrel,
2383                                                  (((Elf64_External_Rela *)
2384                                                    srelgot->contents)
2385                                                   + srelgot->reloc_count));
2386                       ++srelgot->reloc_count;
2387                     }
2388                   else
2389                     bfd_put_64 (output_bfd, relocation, sgot->contents + off);
2390                 }
2391               relocation = sgot->output_offset + off - got_base;
2392             }
2393           goto do_default;
2394
2395         case R_SPARC_WPLT30:
2396         case R_SPARC_PLT32:
2397         case R_SPARC_HIPLT22:
2398         case R_SPARC_LOPLT10:
2399         case R_SPARC_PCPLT32:
2400         case R_SPARC_PCPLT22:
2401         case R_SPARC_PCPLT10:
2402         case R_SPARC_PLT64:
2403           /* Relocation is to the entry for this symbol in the
2404              procedure linkage table.  */
2405           BFD_ASSERT (h != NULL);
2406
2407           if (h->plt.offset == (bfd_vma) -1)
2408             {
2409               /* We didn't make a PLT entry for this symbol.  This
2410                  happens when statically linking PIC code, or when
2411                  using -Bsymbolic.  */
2412               goto do_default;
2413             }
2414
2415           if (splt == NULL)
2416             {
2417               splt = bfd_get_section_by_name (dynobj, ".plt");
2418               BFD_ASSERT (splt != NULL);
2419             }
2420
2421           relocation = (splt->output_section->vma
2422                         + splt->output_offset
2423                         + sparc64_elf_plt_entry_offset (h->plt.offset));
2424           if (r_type == R_SPARC_WPLT30)
2425             goto do_wplt30;
2426           goto do_default;
2427
2428         case R_SPARC_OLO10:
2429           {
2430             bfd_vma x;
2431
2432             relocation += rel->r_addend;
2433             relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info);
2434
2435             x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2436             x = (x & ~0x1fff) | (relocation & 0x1fff);
2437             bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2438
2439             r = bfd_check_overflow (howto->complain_on_overflow,
2440                                     howto->bitsize, howto->rightshift,
2441                                     bfd_arch_bits_per_address (input_bfd),
2442                                     relocation);
2443           }
2444           break;
2445
2446         case R_SPARC_WDISP16:
2447           {
2448             bfd_vma x;
2449
2450             relocation += rel->r_addend;
2451             /* Adjust for pc-relative-ness.  */
2452             relocation -= (input_section->output_section->vma
2453                            + input_section->output_offset);
2454             relocation -= rel->r_offset;
2455
2456             x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2457             x = (x & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6)
2458                                    | ((relocation >> 2) & 0x3fff));
2459             bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2460
2461             r = bfd_check_overflow (howto->complain_on_overflow,
2462                                     howto->bitsize, howto->rightshift,
2463                                     bfd_arch_bits_per_address (input_bfd),
2464                                     relocation);
2465           }
2466           break;
2467
2468         case R_SPARC_HIX22:
2469           {
2470             bfd_vma x;
2471
2472             relocation += rel->r_addend;
2473             relocation = relocation ^ MINUS_ONE;
2474
2475             x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2476             x = (x & ~0x3fffff) | ((relocation >> 10) & 0x3fffff);
2477             bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2478
2479             r = bfd_check_overflow (howto->complain_on_overflow,
2480                                     howto->bitsize, howto->rightshift,
2481                                     bfd_arch_bits_per_address (input_bfd),
2482                                     relocation);
2483           }
2484           break;
2485
2486         case R_SPARC_LOX10:
2487           {
2488             bfd_vma x;
2489
2490             relocation += rel->r_addend;
2491             relocation = (relocation & 0x3ff) | 0x1c00;
2492
2493             x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2494             x = (x & ~0x1fff) | relocation;
2495             bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2496
2497             r = bfd_reloc_ok;
2498           }
2499           break;
2500
2501         case R_SPARC_WDISP30:
2502         do_wplt30:
2503           if (SEC_DO_RELAX (input_section)
2504               && rel->r_offset + 4 < input_section->_raw_size)
2505             {
2506 #define G0              0
2507 #define O7              15
2508 #define XCC             (2 << 20)
2509 #define COND(x)         (((x)&0xf)<<25)
2510 #define CONDA           COND(0x8)
2511 #define INSN_BPA        (F2(0,1) | CONDA | BPRED | XCC)
2512 #define INSN_BA         (F2(0,2) | CONDA)
2513 #define INSN_OR         F3(2, 0x2, 0)
2514 #define INSN_NOP        F2(0,4)
2515
2516               bfd_vma x, y;
2517
2518               /* If the instruction is a call with either:
2519                  restore
2520                  arithmetic instruction with rd == %o7
2521                  where rs1 != %o7 and rs2 if it is register != %o7
2522                  then we can optimize if the call destination is near
2523                  by changing the call into a branch always.  */
2524               x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2525               y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
2526               if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2))
2527                 {
2528                   if (((y & OP3(~0)) == OP3(0x3d) /* restore */
2529                        || ((y & OP3(0x28)) == 0 /* arithmetic */
2530                            && (y & RD(~0)) == RD(O7)))
2531                       && (y & RS1(~0)) != RS1(O7)
2532                       && ((y & F3I(~0))
2533                           || (y & RS2(~0)) != RS2(O7)))
2534                     {
2535                       bfd_vma reloc;
2536
2537                       reloc = relocation + rel->r_addend - rel->r_offset;
2538                       reloc -= (input_section->output_section->vma
2539                                 + input_section->output_offset);
2540                       if (reloc & 3)
2541                         goto do_default;
2542
2543                       /* Ensure the branch fits into simm22.  */
2544                       if ((reloc & ~(bfd_vma)0x7fffff)
2545                            && ((reloc | 0x7fffff) != MINUS_ONE))
2546                         goto do_default;
2547                       reloc >>= 2;
2548
2549                       /* Check whether it fits into simm19.  */
2550                       if ((reloc & 0x3c0000) == 0
2551                           || (reloc & 0x3c0000) == 0x3c0000)
2552                         x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */
2553                       else
2554                         x = INSN_BA | (reloc & 0x3fffff); /* ba */
2555                       bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2556                       r = bfd_reloc_ok;
2557                       if (rel->r_offset >= 4
2558                           && (y & (0xffffffff ^ RS1(~0)))
2559                              == (INSN_OR | RD(O7) | RS2(G0)))
2560                         {
2561                           bfd_vma z;
2562                           unsigned int reg;
2563
2564                           z = bfd_get_32 (input_bfd,
2565                                           contents + rel->r_offset - 4);
2566                           if ((z & (0xffffffff ^ RD(~0)))
2567                               != (INSN_OR | RS1(O7) | RS2(G0)))
2568                             break;
2569
2570                           /* The sequence was
2571                              or %o7, %g0, %rN
2572                              call foo
2573                              or %rN, %g0, %o7
2574
2575                              If call foo was replaced with ba, replace
2576                              or %rN, %g0, %o7 with nop.  */
2577
2578                           reg = (y & RS1(~0)) >> 14;
2579                           if (reg != ((z & RD(~0)) >> 25)
2580                               || reg == G0 || reg == O7)
2581                             break;
2582
2583                           bfd_put_32 (input_bfd, INSN_NOP,
2584                                       contents + rel->r_offset + 4);
2585                         }
2586                       break;
2587                     }
2588                 }
2589             }
2590           /* FALLTHROUGH */
2591
2592         default:
2593         do_default:
2594           r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2595                                         contents, rel->r_offset,
2596                                         relocation, rel->r_addend);
2597           break;
2598         }
2599
2600       switch (r)
2601         {
2602         case bfd_reloc_ok:
2603           break;
2604
2605         default:
2606         case bfd_reloc_outofrange:
2607           abort ();
2608
2609         case bfd_reloc_overflow:
2610           {
2611             const char *name;
2612
2613             if (h != NULL)
2614               {
2615                 if (h->root.type == bfd_link_hash_undefweak
2616                     && howto->pc_relative)
2617                   {
2618                     /* Assume this is a call protected by other code that
2619                        detect the symbol is undefined.  If this is the case,
2620                        we can safely ignore the overflow.  If not, the
2621                        program is hosed anyway, and a little warning isn't
2622                        going to help.  */
2623                     break;
2624                   }
2625
2626                 name = h->root.root.string;
2627               }
2628             else
2629               {
2630                 name = (bfd_elf_string_from_elf_section
2631                         (input_bfd,
2632                          symtab_hdr->sh_link,
2633                          sym->st_name));
2634                 if (name == NULL)
2635                   return false;
2636                 if (*name == '\0')
2637                   name = bfd_section_name (input_bfd, sec);
2638               }
2639             if (! ((*info->callbacks->reloc_overflow)
2640                    (info, name, howto->name, (bfd_vma) 0,
2641                     input_bfd, input_section, rel->r_offset)))
2642               return false;
2643           }
2644         break;
2645         }
2646     }
2647
2648   return true;
2649 }
2650
2651 /* Finish up dynamic symbol handling.  We set the contents of various
2652    dynamic sections here.  */
2653
2654 static boolean
2655 sparc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
2656      bfd *output_bfd;
2657      struct bfd_link_info *info;
2658      struct elf_link_hash_entry *h;
2659      Elf_Internal_Sym *sym;
2660 {
2661   bfd *dynobj;
2662
2663   dynobj = elf_hash_table (info)->dynobj;
2664
2665   if (h->plt.offset != (bfd_vma) -1)
2666     {
2667       asection *splt;
2668       asection *srela;
2669       Elf_Internal_Rela rela;
2670
2671       /* This symbol has an entry in the PLT.  Set it up.  */
2672
2673       BFD_ASSERT (h->dynindx != -1);
2674
2675       splt = bfd_get_section_by_name (dynobj, ".plt");
2676       srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2677       BFD_ASSERT (splt != NULL && srela != NULL);
2678
2679       /* Fill in the entry in the .rela.plt section.  */
2680
2681       if (h->plt.offset < LARGE_PLT_THRESHOLD)
2682         {
2683           rela.r_offset = sparc64_elf_plt_entry_offset (h->plt.offset);
2684           rela.r_addend = 0;
2685         }
2686       else
2687         {
2688           int max = splt->_raw_size / PLT_ENTRY_SIZE;
2689           rela.r_offset = sparc64_elf_plt_ptr_offset (h->plt.offset, max);
2690           rela.r_addend = -(sparc64_elf_plt_entry_offset (h->plt.offset) + 4)
2691                           -(splt->output_section->vma + splt->output_offset);
2692         }
2693       rela.r_offset += (splt->output_section->vma + splt->output_offset);
2694       rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_JMP_SLOT);
2695
2696       /* Adjust for the first 4 reserved elements in the .plt section
2697          when setting the offset in the .rela.plt section.
2698          Sun forgot to read their own ABI and copied elf32-sparc behaviour,
2699          thus .plt[4] has corresponding .rela.plt[0] and so on.  */
2700
2701       bfd_elf64_swap_reloca_out (output_bfd, &rela,
2702                                  ((Elf64_External_Rela *) srela->contents
2703                                   + (h->plt.offset - 4)));
2704
2705       if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2706         {
2707           /* Mark the symbol as undefined, rather than as defined in
2708              the .plt section.  Leave the value alone.  */
2709           sym->st_shndx = SHN_UNDEF;
2710           /* If the symbol is weak, we do need to clear the value.
2711              Otherwise, the PLT entry would provide a definition for
2712              the symbol even if the symbol wasn't defined anywhere,
2713              and so the symbol would never be NULL.  */
2714           if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
2715               == 0)
2716             sym->st_value = 0;
2717         }
2718     }
2719
2720   if (h->got.offset != (bfd_vma) -1)
2721     {
2722       asection *sgot;
2723       asection *srela;
2724       Elf_Internal_Rela rela;
2725
2726       /* This symbol has an entry in the GOT.  Set it up.  */
2727
2728       sgot = bfd_get_section_by_name (dynobj, ".got");
2729       srela = bfd_get_section_by_name (dynobj, ".rela.got");
2730       BFD_ASSERT (sgot != NULL && srela != NULL);
2731
2732       rela.r_offset = (sgot->output_section->vma
2733                        + sgot->output_offset
2734                        + (h->got.offset &~ 1));
2735
2736       /* If this is a -Bsymbolic link, and the symbol is defined
2737          locally, we just want to emit a RELATIVE reloc.  Likewise if
2738          the symbol was forced to be local because of a version file.
2739          The entry in the global offset table will already have been
2740          initialized in the relocate_section function.  */
2741       if (info->shared
2742           && (info->symbolic || h->dynindx == -1)
2743           && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2744         {
2745           asection *sec = h->root.u.def.section;
2746           rela.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2747           rela.r_addend = (h->root.u.def.value
2748                            + sec->output_section->vma
2749                            + sec->output_offset);
2750         }
2751       else
2752         {
2753           bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2754           rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_GLOB_DAT);
2755           rela.r_addend = 0;
2756         }
2757
2758       bfd_elf64_swap_reloca_out (output_bfd, &rela,
2759                                  ((Elf64_External_Rela *) srela->contents
2760                                   + srela->reloc_count));
2761       ++srela->reloc_count;
2762     }
2763
2764   if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2765     {
2766       asection *s;
2767       Elf_Internal_Rela rela;
2768
2769       /* This symbols needs a copy reloc.  Set it up.  */
2770
2771       BFD_ASSERT (h->dynindx != -1);
2772
2773       s = bfd_get_section_by_name (h->root.u.def.section->owner,
2774                                    ".rela.bss");
2775       BFD_ASSERT (s != NULL);
2776
2777       rela.r_offset = (h->root.u.def.value
2778                        + h->root.u.def.section->output_section->vma
2779                        + h->root.u.def.section->output_offset);
2780       rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_COPY);
2781       rela.r_addend = 0;
2782       bfd_elf64_swap_reloca_out (output_bfd, &rela,
2783                                  ((Elf64_External_Rela *) s->contents
2784                                   + s->reloc_count));
2785       ++s->reloc_count;
2786     }
2787
2788   /* Mark some specially defined symbols as absolute.  */
2789   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2790       || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2791       || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2792     sym->st_shndx = SHN_ABS;
2793
2794   return true;
2795 }
2796
2797 /* Finish up the dynamic sections.  */
2798
2799 static boolean
2800 sparc64_elf_finish_dynamic_sections (output_bfd, info)
2801      bfd *output_bfd;
2802      struct bfd_link_info *info;
2803 {
2804   bfd *dynobj;
2805   int stt_regidx = -1;
2806   asection *sdyn;
2807   asection *sgot;
2808
2809   dynobj = elf_hash_table (info)->dynobj;
2810
2811   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2812
2813   if (elf_hash_table (info)->dynamic_sections_created)
2814     {
2815       asection *splt;
2816       Elf64_External_Dyn *dyncon, *dynconend;
2817
2818       splt = bfd_get_section_by_name (dynobj, ".plt");
2819       BFD_ASSERT (splt != NULL && sdyn != NULL);
2820
2821       dyncon = (Elf64_External_Dyn *) sdyn->contents;
2822       dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2823       for (; dyncon < dynconend; dyncon++)
2824         {
2825           Elf_Internal_Dyn dyn;
2826           const char *name;
2827           boolean size;
2828
2829           bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
2830
2831           switch (dyn.d_tag)
2832             {
2833             case DT_PLTGOT:   name = ".plt"; size = false; break;
2834             case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
2835             case DT_JMPREL:   name = ".rela.plt"; size = false; break;
2836             case DT_SPARC_REGISTER:
2837               if (stt_regidx == -1)
2838                 {
2839                   stt_regidx =
2840                     _bfd_elf_link_lookup_local_dynindx (info, output_bfd, -1);
2841                   if (stt_regidx == -1)
2842                     return false;
2843                 }
2844               dyn.d_un.d_val = stt_regidx++;
2845               bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2846               /* fallthrough */
2847             default:          name = NULL; size = false; break;
2848             }
2849
2850           if (name != NULL)
2851             {
2852               asection *s;
2853
2854               s = bfd_get_section_by_name (output_bfd, name);
2855               if (s == NULL)
2856                 dyn.d_un.d_val = 0;
2857               else
2858                 {
2859                   if (! size)
2860                     dyn.d_un.d_ptr = s->vma;
2861                   else
2862                     {
2863                       if (s->_cooked_size != 0)
2864                         dyn.d_un.d_val = s->_cooked_size;
2865                       else
2866                         dyn.d_un.d_val = s->_raw_size;
2867                     }
2868                 }
2869               bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2870             }
2871         }
2872
2873       /* Initialize the contents of the .plt section.  */
2874       if (splt->_raw_size > 0)
2875         {
2876           sparc64_elf_build_plt(output_bfd, splt->contents,
2877                                 splt->_raw_size / PLT_ENTRY_SIZE);
2878         }
2879
2880       elf_section_data (splt->output_section)->this_hdr.sh_entsize =
2881         PLT_ENTRY_SIZE;
2882     }
2883
2884   /* Set the first entry in the global offset table to the address of
2885      the dynamic section.  */
2886   sgot = bfd_get_section_by_name (dynobj, ".got");
2887   BFD_ASSERT (sgot != NULL);
2888   if (sgot->_raw_size > 0)
2889     {
2890       if (sdyn == NULL)
2891         bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents);
2892       else
2893         bfd_put_64 (output_bfd,
2894                     sdyn->output_section->vma + sdyn->output_offset,
2895                     sgot->contents);
2896     }
2897
2898   elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 8;
2899
2900   return true;
2901 }
2902 \f
2903 /* Functions for dealing with the e_flags field.  */
2904
2905 /* Copy backend specific data from one object module to another */
2906 static boolean
2907 sparc64_elf_copy_private_bfd_data (ibfd, obfd)
2908      bfd *ibfd, *obfd;
2909 {
2910   if (   bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2911       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2912     return true;
2913
2914   BFD_ASSERT (!elf_flags_init (obfd)
2915               || (elf_elfheader (obfd)->e_flags
2916                   == elf_elfheader (ibfd)->e_flags));
2917
2918   elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
2919   elf_flags_init (obfd) = true;
2920   return true;
2921 }
2922
2923 /* Merge backend specific data from an object file to the output
2924    object file when linking.  */
2925
2926 static boolean
2927 sparc64_elf_merge_private_bfd_data (ibfd, obfd)
2928      bfd *ibfd;
2929      bfd *obfd;
2930 {
2931   boolean error;
2932   flagword new_flags, old_flags;
2933   int new_mm, old_mm;
2934
2935   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2936       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2937     return true;
2938
2939   new_flags = elf_elfheader (ibfd)->e_flags;
2940   old_flags = elf_elfheader (obfd)->e_flags;
2941
2942   if (!elf_flags_init (obfd))   /* First call, no flags set */
2943     {
2944       elf_flags_init (obfd) = true;
2945       elf_elfheader (obfd)->e_flags = new_flags;
2946     }
2947
2948   else if (new_flags == old_flags)      /* Compatible flags are ok */
2949     ;
2950
2951   else                                  /* Incompatible flags */
2952     {
2953       error = false;
2954
2955 #define EF_SPARC_ISA_EXTENSIONS \
2956   (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1)
2957
2958       if ((ibfd->flags & DYNAMIC) != 0)
2959         {
2960           /* We don't want dynamic objects memory ordering and
2961              architecture to have any role. That's what dynamic linker
2962              should do.  */
2963           new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS);
2964           new_flags |= (old_flags
2965                         & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS));
2966         }
2967       else
2968         {
2969           /* Choose the highest architecture requirements.  */
2970           old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS);
2971           new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS);
2972           if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3))
2973               && (old_flags & EF_SPARC_HAL_R1))
2974             {
2975               error = true;
2976               (*_bfd_error_handler)
2977                 (_("%s: linking UltraSPARC specific with HAL specific code"),
2978                  bfd_get_filename (ibfd));
2979             }
2980           /* Choose the most restrictive memory ordering.  */
2981           old_mm = (old_flags & EF_SPARCV9_MM);
2982           new_mm = (new_flags & EF_SPARCV9_MM);
2983           old_flags &= ~EF_SPARCV9_MM;
2984           new_flags &= ~EF_SPARCV9_MM;
2985           if (new_mm < old_mm)
2986             old_mm = new_mm;
2987           old_flags |= old_mm;
2988           new_flags |= old_mm;
2989         }
2990
2991       /* Warn about any other mismatches */
2992       if (new_flags != old_flags)
2993         {
2994           error = true;
2995           (*_bfd_error_handler)
2996             (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
2997              bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
2998         }
2999
3000       elf_elfheader (obfd)->e_flags = old_flags;
3001
3002       if (error)
3003         {
3004           bfd_set_error (bfd_error_bad_value);
3005           return false;
3006         }
3007     }
3008   return true;
3009 }
3010 \f
3011 /* Print a STT_REGISTER symbol to file FILE.  */
3012
3013 static const char *
3014 sparc64_elf_print_symbol_all (abfd, filep, symbol)
3015      bfd *abfd ATTRIBUTE_UNUSED;
3016      PTR filep;
3017      asymbol *symbol;
3018 {
3019   FILE *file = (FILE *) filep;
3020   int reg, type;
3021
3022   if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info)
3023       != STT_REGISTER)
3024     return NULL;
3025
3026   reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
3027   type = symbol->flags;
3028   fprintf (file, "REG_%c%c%11s%c%c    R", "GOLI" [reg / 8], '0' + (reg & 7), "",
3029                  ((type & BSF_LOCAL)
3030                   ? (type & BSF_GLOBAL) ? '!' : 'l'
3031                   : (type & BSF_GLOBAL) ? 'g' : ' '),
3032                  (type & BSF_WEAK) ? 'w' : ' ');
3033   if (symbol->name == NULL || symbol->name [0] == '\0')
3034     return "#scratch";
3035   else
3036     return symbol->name;
3037 }
3038 \f
3039 /* Set the right machine number for a SPARC64 ELF file.  */
3040
3041 static boolean
3042 sparc64_elf_object_p (abfd)
3043      bfd *abfd;
3044 {
3045   unsigned long mach = bfd_mach_sparc_v9;
3046
3047   if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3)
3048     mach = bfd_mach_sparc_v9b;
3049   else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
3050     mach = bfd_mach_sparc_v9a;
3051   return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach);
3052 }
3053
3054 /* Relocations in the 64 bit SPARC ELF ABI are more complex than in
3055    standard ELF, because R_SPARC_OLO10 has secondary addend in
3056    ELF64_R_TYPE_DATA field.  This structure is used to redirect the
3057    relocation handling routines.  */
3058
3059 const struct elf_size_info sparc64_elf_size_info =
3060 {
3061   sizeof (Elf64_External_Ehdr),
3062   sizeof (Elf64_External_Phdr),
3063   sizeof (Elf64_External_Shdr),
3064   sizeof (Elf64_External_Rel),
3065   sizeof (Elf64_External_Rela),
3066   sizeof (Elf64_External_Sym),
3067   sizeof (Elf64_External_Dyn),
3068   sizeof (Elf_External_Note),
3069   4,            /* hash-table entry size */
3070   /* internal relocations per external relocations.
3071      For link purposes we use just 1 internal per
3072      1 external, for assembly and slurp symbol table
3073      we use 2.  */
3074   1,
3075   64,           /* arch_size */
3076   8,            /* file_align */
3077   ELFCLASS64,
3078   EV_CURRENT,
3079   bfd_elf64_write_out_phdrs,
3080   bfd_elf64_write_shdrs_and_ehdr,
3081   sparc64_elf_write_relocs,
3082   bfd_elf64_swap_symbol_out,
3083   sparc64_elf_slurp_reloc_table,
3084   bfd_elf64_slurp_symbol_table,
3085   bfd_elf64_swap_dyn_in,
3086   bfd_elf64_swap_dyn_out,
3087   NULL,
3088   NULL,
3089   NULL,
3090   NULL
3091 };
3092
3093 #define TARGET_BIG_SYM  bfd_elf64_sparc_vec
3094 #define TARGET_BIG_NAME "elf64-sparc"
3095 #define ELF_ARCH        bfd_arch_sparc
3096 #define ELF_MAXPAGESIZE 0x100000
3097
3098 /* This is the official ABI value.  */
3099 #define ELF_MACHINE_CODE EM_SPARCV9
3100
3101 /* This is the value that we used before the ABI was released.  */
3102 #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9
3103
3104 #define bfd_elf64_bfd_link_hash_table_create \
3105   sparc64_elf_bfd_link_hash_table_create
3106
3107 #define elf_info_to_howto \
3108   sparc64_elf_info_to_howto
3109 #define bfd_elf64_get_reloc_upper_bound \
3110   sparc64_elf_get_reloc_upper_bound
3111 #define bfd_elf64_get_dynamic_reloc_upper_bound \
3112   sparc64_elf_get_dynamic_reloc_upper_bound
3113 #define bfd_elf64_canonicalize_dynamic_reloc \
3114   sparc64_elf_canonicalize_dynamic_reloc
3115 #define bfd_elf64_bfd_reloc_type_lookup \
3116   sparc64_elf_reloc_type_lookup
3117 #define bfd_elf64_bfd_relax_section \
3118   sparc64_elf_relax_section
3119
3120 #define elf_backend_create_dynamic_sections \
3121   _bfd_elf_create_dynamic_sections
3122 #define elf_backend_add_symbol_hook \
3123   sparc64_elf_add_symbol_hook
3124 #define elf_backend_get_symbol_type \
3125   sparc64_elf_get_symbol_type
3126 #define elf_backend_symbol_processing \
3127   sparc64_elf_symbol_processing
3128 #define elf_backend_check_relocs \
3129   sparc64_elf_check_relocs
3130 #define elf_backend_adjust_dynamic_symbol \
3131   sparc64_elf_adjust_dynamic_symbol
3132 #define elf_backend_size_dynamic_sections \
3133   sparc64_elf_size_dynamic_sections
3134 #define elf_backend_relocate_section \
3135   sparc64_elf_relocate_section
3136 #define elf_backend_finish_dynamic_symbol \
3137   sparc64_elf_finish_dynamic_symbol
3138 #define elf_backend_finish_dynamic_sections \
3139   sparc64_elf_finish_dynamic_sections
3140 #define elf_backend_print_symbol_all \
3141   sparc64_elf_print_symbol_all
3142 #define elf_backend_output_arch_syms \
3143   sparc64_elf_output_arch_syms
3144 #define bfd_elf64_bfd_copy_private_bfd_data \
3145   sparc64_elf_copy_private_bfd_data
3146 #define bfd_elf64_bfd_merge_private_bfd_data \
3147   sparc64_elf_merge_private_bfd_data
3148
3149 #define elf_backend_size_info \
3150   sparc64_elf_size_info
3151 #define elf_backend_object_p \
3152   sparc64_elf_object_p
3153
3154 #define elf_backend_want_got_plt 0
3155 #define elf_backend_plt_readonly 0
3156 #define elf_backend_want_plt_sym 1
3157
3158 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table.  */
3159 #define elf_backend_plt_alignment 8
3160
3161 #define elf_backend_got_header_size 8
3162 #define elf_backend_plt_header_size PLT_HEADER_SIZE
3163
3164 #include "elf64-target.h"