bfd/elf32-cris.c

   1 /* CRIS-specific support for 32-bit ELF.
   2    Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
   3    Free Software Foundation, Inc.
   4    Contributed by Axis Communications AB.
   5    Written by Hans-Peter Nilsson, based on elf32-fr30.c
   6    PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
   7
   8    This file is part of BFD, the Binary File Descriptor library.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  23
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "libbfd.h"
  27 #include "elf-bfd.h"
  28 #include "elf/cris.h"
  29
  30 /* Forward declarations.  */
  31 static reloc_howto_type * cris_reloc_type_lookup
  32   PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
  33
  34 static void cris_info_to_howto_rela
  35   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
  36
  37 static bfd_reloc_status_type cris_elf_pcrel_reloc
  38   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  39
  40 static bfd_boolean cris_elf_grok_prstatus
  41   PARAMS ((bfd *abfd, Elf_Internal_Note *note));
  42
  43 static bfd_boolean cris_elf_grok_psinfo
  44   PARAMS ((bfd *abfd, Elf_Internal_Note *note));
  45
  46 static bfd_boolean cris_elf_relocate_section
  47   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
  48            Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
  49
  50 static bfd_reloc_status_type cris_final_link_relocate
  51   PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
  52            Elf_Internal_Rela *, bfd_vma));
  53
  54 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
  55
  56 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
  57
  58 static bfd_boolean cris_elf_set_mach_from_flags
  59   PARAMS ((bfd *, unsigned long int));
  60
  61 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
  62
  63 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
  64 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
  65
  66 struct elf_cris_link_hash_entry;
  67 static bfd_boolean elf_cris_discard_excess_dso_dynamics
  68   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
  69 static bfd_boolean elf_cris_discard_excess_program_dynamics
  70   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
  71 static bfd_boolean elf_cris_adjust_gotplt_to_got
  72   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
  73 static bfd_boolean elf_cris_try_fold_plt_to_got
  74   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
  75 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
  76   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
  77 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
  78   PARAMS ((bfd *));
  79 static bfd_boolean elf_cris_adjust_dynamic_symbol
  80   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
  81 static bfd_boolean cris_elf_check_relocs
  82   PARAMS ((bfd *, struct bfd_link_info *, asection *,
  83            const Elf_Internal_Rela *));
  84
  85 static bfd_boolean elf_cris_size_dynamic_sections
  86   PARAMS ((bfd *, struct bfd_link_info *));
  87 static bfd_boolean elf_cris_finish_dynamic_symbol
  88   PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
  89            Elf_Internal_Sym *));
  90 static bfd_boolean elf_cris_finish_dynamic_sections
  91   PARAMS ((bfd *, struct bfd_link_info *));
  92 static void elf_cris_hide_symbol
  93   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
  94 static enum elf_reloc_type_class elf_cris_reloc_type_class
  95   PARAMS ((const Elf_Internal_Rela *));
  96
  97 static reloc_howto_type cris_elf_howto_table [] =
  98 {
  99   /* This reloc does nothing.  */
 100   HOWTO (R_CRIS_NONE,           /* type */
 101          0,                     /* rightshift */
 102          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 103          32,                    /* bitsize */
 104          FALSE,                 /* pc_relative */
 105          0,                     /* bitpos */
 106          complain_overflow_bitfield, /* complain_on_overflow */
 107          bfd_elf_generic_reloc, /* special_function */
 108          "R_CRIS_NONE",         /* name */
 109          FALSE,                 /* partial_inplace */
 110          0,                     /* src_mask */
 111          0,                     /* dst_mask */
 112          FALSE),                /* pcrel_offset */
 113
 114   /* An 8 bit absolute relocation.  */
 115   HOWTO (R_CRIS_8,              /* type */
 116          0,                     /* rightshift */
 117          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 118          8,                     /* bitsize */
 119          FALSE,                 /* pc_relative */
 120          0,                     /* bitpos */
 121          complain_overflow_bitfield, /* complain_on_overflow */
 122          bfd_elf_generic_reloc, /* special_function */
 123          "R_CRIS_8",            /* name */
 124          FALSE,                 /* partial_inplace */
 125          0x0000,                /* src_mask */
 126          0x00ff,                /* dst_mask */
 127          FALSE),                /* pcrel_offset */
 128
 129   /* A 16 bit absolute relocation.  */
 130   HOWTO (R_CRIS_16,             /* type */
 131          0,                     /* rightshift */
 132          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 133          16,                    /* bitsize */
 134          FALSE,                 /* pc_relative */
 135          0,                     /* bitpos */
 136          complain_overflow_bitfield, /* complain_on_overflow */
 137          bfd_elf_generic_reloc, /* special_function */
 138          "R_CRIS_16",           /* name */
 139          FALSE,                 /* partial_inplace */
 140          0x00000000,            /* src_mask */
 141          0x0000ffff,            /* dst_mask */
 142          FALSE),                /* pcrel_offset */
 143
 144   /* A 32 bit absolute relocation.  */
 145   HOWTO (R_CRIS_32,             /* type */
 146          0,                     /* rightshift */
 147          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 148          32,                    /* bitsize */
 149          FALSE,                 /* pc_relative */
 150          0,                     /* bitpos */
 151          /* We don't want overflow complaints for 64-bit vma builds
 152             for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
 153             32-bit ELF) where sym=0xc0001234.
 154             Don't do this for the PIC relocs, as we don't expect to
 155             see them with large offsets.  */
 156          complain_overflow_dont, /* complain_on_overflow */
 157          bfd_elf_generic_reloc, /* special_function */
 158          "R_CRIS_32",           /* name */
 159          FALSE,                 /* partial_inplace */
 160          0x00000000,            /* src_mask */
 161          0xffffffff,            /* dst_mask */
 162          FALSE),                /* pcrel_offset */
 163
 164   /* An 8 bit PC-relative relocation.  */
 165   HOWTO (R_CRIS_8_PCREL,        /* type */
 166          0,                     /* rightshift */
 167          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 168          8,                     /* bitsize */
 169          TRUE,                  /* pc_relative */
 170          0,                     /* bitpos */
 171          complain_overflow_bitfield, /* complain_on_overflow */
 172          cris_elf_pcrel_reloc,  /* special_function */
 173          "R_CRIS_8_PCREL",      /* name */
 174          FALSE,                 /* partial_inplace */
 175          0x0000,                /* src_mask */
 176          0x00ff,                /* dst_mask */
 177          TRUE),                 /* pcrel_offset */
 178
 179   /* A 16 bit PC-relative relocation.  */
 180   HOWTO (R_CRIS_16_PCREL,       /* type */
 181          0,                     /* rightshift */
 182          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 183          16,                    /* bitsize */
 184          TRUE,                  /* pc_relative */
 185          0,                     /* bitpos */
 186          complain_overflow_bitfield, /* complain_on_overflow */
 187          cris_elf_pcrel_reloc,  /* special_function */
 188          "R_CRIS_16_PCREL",     /* name */
 189          FALSE,                 /* partial_inplace */
 190          0x00000000,            /* src_mask */
 191          0x0000ffff,            /* dst_mask */
 192          TRUE),                 /* pcrel_offset */
 193
 194   /* A 32 bit PC-relative relocation.  */
 195   HOWTO (R_CRIS_32_PCREL,       /* type */
 196          0,                     /* rightshift */
 197          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 198          32,                    /* bitsize */
 199          TRUE,                  /* pc_relative */
 200          0,                     /* bitpos */
 201          complain_overflow_bitfield, /* complain_on_overflow */
 202          cris_elf_pcrel_reloc,  /* special_function */
 203          "R_CRIS_32_PCREL",     /* name */
 204          FALSE,                 /* partial_inplace */
 205          0x00000000,            /* src_mask */
 206          0xffffffff,            /* dst_mask */
 207          TRUE),                 /* pcrel_offset */
 208
 209   /* GNU extension to record C++ vtable hierarchy.  */
 210   HOWTO (R_CRIS_GNU_VTINHERIT,  /* type */
 211          0,                     /* rightshift */
 212          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 213          0,                     /* bitsize */
 214          FALSE,                 /* pc_relative */
 215          0,                     /* bitpos */
 216          complain_overflow_dont, /* complain_on_overflow */
 217          NULL,                  /* special_function */
 218          "R_CRIS_GNU_VTINHERIT", /* name */
 219          FALSE,                 /* partial_inplace */
 220          0,                     /* src_mask */
 221          0,                     /* dst_mask */
 222          FALSE),                /* pcrel_offset */
 223
 224   /* GNU extension to record C++ vtable member usage.  */
 225   HOWTO (R_CRIS_GNU_VTENTRY,    /* type */
 226          0,                     /* rightshift */
 227          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 228          0,                     /* bitsize */
 229          FALSE,                 /* pc_relative */
 230          0,                     /* bitpos */
 231          complain_overflow_dont, /* complain_on_overflow */
 232          _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
 233          "R_CRIS_GNU_VTENTRY",   /* name */
 234          FALSE,                 /* partial_inplace */
 235          0,                     /* src_mask */
 236          0,                     /* dst_mask */
 237          FALSE),                /* pcrel_offset */
 238
 239   /* This is used only by the dynamic linker.  The symbol should exist
 240      both in the object being run and in some shared library.  The
 241      dynamic linker copies the data addressed by the symbol from the
 242      shared library into the object, because the object being
 243      run has to have the data at some particular address.  */
 244   HOWTO (R_CRIS_COPY,           /* type */
 245          0,                     /* rightshift */
 246          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 247          32,                    /* bitsize */
 248          FALSE,                 /* pc_relative */
 249          0,                     /* bitpos */
 250          complain_overflow_bitfield, /* complain_on_overflow */
 251          bfd_elf_generic_reloc, /* special_function */
 252          "R_CRIS_COPY",         /* name */
 253          FALSE,                 /* partial_inplace */
 254          0,                     /* src_mask */
 255          0,                     /* dst_mask */
 256          FALSE),                /* pcrel_offset */
 257
 258   /* Like R_CRIS_32, but used when setting global offset table entries.  */
 259   HOWTO (R_CRIS_GLOB_DAT,       /* type */
 260          0,                     /* rightshift */
 261          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 262          32,                    /* bitsize */
 263          FALSE,                 /* pc_relative */
 264          0,                     /* bitpos */
 265          complain_overflow_bitfield, /* complain_on_overflow */
 266          bfd_elf_generic_reloc, /* special_function */
 267          "R_CRIS_GLOB_DAT",     /* name */
 268          FALSE,                 /* partial_inplace */
 269          0,                     /* src_mask */
 270          0xffffffff,            /* dst_mask */
 271          FALSE),                /* pcrel_offset */
 272
 273   /* Marks a procedure linkage table entry for a symbol.  */
 274   HOWTO (R_CRIS_JUMP_SLOT,      /* type */
 275          0,                     /* rightshift */
 276          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 277          32,                    /* bitsize */
 278          FALSE,                 /* pc_relative */
 279          0,                     /* bitpos */
 280          complain_overflow_bitfield, /* complain_on_overflow */
 281          bfd_elf_generic_reloc, /* special_function */
 282          "R_CRIS_JUMP_SLOT",    /* name */
 283          FALSE,                 /* partial_inplace */
 284          0,                     /* src_mask */
 285          0,                     /* dst_mask */
 286          FALSE),                /* pcrel_offset */
 287
 288   /* Used only by the dynamic linker.  When the object is run, this
 289      longword is set to the load address of the object, plus the
 290      addend.  */
 291   HOWTO (R_CRIS_RELATIVE,       /* type */
 292          0,                     /* rightshift */
 293          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 294          32,                    /* bitsize */
 295          FALSE,                 /* pc_relative */
 296          0,                     /* bitpos */
 297          complain_overflow_bitfield, /* complain_on_overflow */
 298          bfd_elf_generic_reloc, /* special_function */
 299          "R_CRIS_RELATIVE",     /* name */
 300          FALSE,                 /* partial_inplace */
 301          0,                     /* src_mask */
 302          0xffffffff,            /* dst_mask */
 303          FALSE),                /* pcrel_offset */
 304
 305   /* Like R_CRIS_32, but referring to the GOT table entry for the symbol.  */
 306   HOWTO (R_CRIS_16_GOT,         /* type */
 307          0,                     /* rightshift */
 308          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 309          16,                    /* bitsize */
 310          FALSE,                 /* pc_relative */
 311          0,                     /* bitpos */
 312          complain_overflow_bitfield, /* complain_on_overflow */
 313          bfd_elf_generic_reloc, /* special_function */
 314          "R_CRIS_16_GOT",       /* name */
 315          FALSE,                 /* partial_inplace */
 316          0,                     /* src_mask */
 317          0xffff,                /* dst_mask */
 318          FALSE),                /* pcrel_offset */
 319
 320   HOWTO (R_CRIS_32_GOT,         /* type */
 321          0,                     /* rightshift */
 322          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 323          32,                    /* bitsize */
 324          FALSE,                 /* pc_relative */
 325          0,                     /* bitpos */
 326          complain_overflow_bitfield, /* complain_on_overflow */
 327          bfd_elf_generic_reloc, /* special_function */
 328          "R_CRIS_32_GOT",       /* name */
 329          FALSE,                 /* partial_inplace */
 330          0,                     /* src_mask */
 331          0xffffffff,            /* dst_mask */
 332          FALSE),                /* pcrel_offset */
 333
 334   /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
 335      the GOT table for the symbol.  */
 336   HOWTO (R_CRIS_16_GOTPLT,      /* type */
 337          0,                     /* rightshift */
 338          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 339          16,                    /* bitsize */
 340          FALSE,                 /* pc_relative */
 341          0,                     /* bitpos */
 342          complain_overflow_bitfield, /* complain_on_overflow */
 343          bfd_elf_generic_reloc, /* special_function */
 344          "R_CRIS_16_GOTPLT",    /* name */
 345          FALSE,                 /* partial_inplace */
 346          0,                     /* src_mask */
 347          0xffff,                /* dst_mask */
 348          FALSE),                /* pcrel_offset */
 349
 350   HOWTO (R_CRIS_32_GOTPLT,      /* type */
 351          0,                     /* rightshift */
 352          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 353          32,                    /* bitsize */
 354          FALSE,                 /* pc_relative */
 355          0,                     /* bitpos */
 356          complain_overflow_bitfield, /* complain_on_overflow */
 357          bfd_elf_generic_reloc, /* special_function */
 358          "R_CRIS_32_GOTPLT",    /* name */
 359          FALSE,                 /* partial_inplace */
 360          0,                     /* src_mask */
 361          0xffffffff,            /* dst_mask */
 362          FALSE),                /* pcrel_offset */
 363
 364   /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
 365      be necessary.  */
 366   HOWTO (R_CRIS_32_GOTREL,      /* type */
 367          0,                     /* rightshift */
 368          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 369          32,                    /* bitsize */
 370          FALSE,                 /* pc_relative */
 371          0,                     /* bitpos */
 372          complain_overflow_bitfield, /* complain_on_overflow */
 373          bfd_elf_generic_reloc, /* special_function */
 374          "R_CRIS_32_GOTREL",    /* name */
 375          FALSE,                 /* partial_inplace */
 376          0,                     /* src_mask */
 377          0xffffffff,            /* dst_mask */
 378          FALSE),                /* pcrel_offset */
 379
 380   /* A 32-bit offset from GOT to entry for this symbol in PLT and request
 381      to create PLT entry for symbol.  */
 382   HOWTO (R_CRIS_32_PLT_GOTREL,  /* type */
 383          0,                     /* rightshift */
 384          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 385          32,                    /* bitsize */
 386          FALSE,                 /* pc_relative */
 387          0,                     /* bitpos */
 388          complain_overflow_bitfield, /* complain_on_overflow */
 389          bfd_elf_generic_reloc, /* special_function */
 390          "R_CRIS_32_PLT_GOTREL", /* name */
 391          FALSE,                 /* partial_inplace */
 392          0,                     /* src_mask */
 393          0xffffffff,            /* dst_mask */
 394          FALSE),                /* pcrel_offset */
 395
 396   /* A 32-bit offset from PC (location after the relocation) + addend to
 397      entry for this symbol in PLT and request to create PLT entry for
 398      symbol.  */
 399   HOWTO (R_CRIS_32_PLT_PCREL,   /* type */
 400          0,                     /* rightshift */
 401          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 402          32,                    /* bitsize */
 403          TRUE,                  /* pc_relative */
 404          0,                     /* bitpos */
 405          complain_overflow_bitfield, /* complain_on_overflow */
 406          cris_elf_pcrel_reloc,  /* special_function */
 407          "R_CRIS_32_PLT_PCREL", /* name */
 408          FALSE,                 /* partial_inplace */
 409          0,                     /* src_mask */
 410          0xffffffff,            /* dst_mask */
 411          TRUE)                  /* pcrel_offset */
 412 };
 413 \f
 414 /* Map BFD reloc types to CRIS ELF reloc types.  */
 415
 416 struct cris_reloc_map
 417 {
 418   bfd_reloc_code_real_type bfd_reloc_val;
 419   unsigned int cris_reloc_val;
 420 };
 421
 422 static const struct cris_reloc_map cris_reloc_map [] =
 423 {
 424   { BFD_RELOC_NONE,             R_CRIS_NONE },
 425   { BFD_RELOC_8,                R_CRIS_8 },
 426   { BFD_RELOC_16,               R_CRIS_16 },
 427   { BFD_RELOC_32,               R_CRIS_32 },
 428   { BFD_RELOC_8_PCREL,          R_CRIS_8_PCREL },
 429   { BFD_RELOC_16_PCREL,         R_CRIS_16_PCREL },
 430   { BFD_RELOC_32_PCREL,         R_CRIS_32_PCREL },
 431   { BFD_RELOC_VTABLE_INHERIT,   R_CRIS_GNU_VTINHERIT },
 432   { BFD_RELOC_VTABLE_ENTRY,     R_CRIS_GNU_VTENTRY },
 433   { BFD_RELOC_CRIS_COPY,        R_CRIS_COPY },
 434   { BFD_RELOC_CRIS_GLOB_DAT,    R_CRIS_GLOB_DAT },
 435   { BFD_RELOC_CRIS_JUMP_SLOT,   R_CRIS_JUMP_SLOT },
 436   { BFD_RELOC_CRIS_RELATIVE,    R_CRIS_RELATIVE },
 437   { BFD_RELOC_CRIS_16_GOT,      R_CRIS_16_GOT },
 438   { BFD_RELOC_CRIS_32_GOT,      R_CRIS_32_GOT },
 439   { BFD_RELOC_CRIS_16_GOTPLT,   R_CRIS_16_GOTPLT },
 440   { BFD_RELOC_CRIS_32_GOTPLT,   R_CRIS_32_GOTPLT },
 441   { BFD_RELOC_CRIS_32_GOTREL,   R_CRIS_32_GOTREL },
 442   { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
 443   { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }
 444 };
 445
 446 static reloc_howto_type *
 447 cris_reloc_type_lookup (abfd, code)
 448      bfd * abfd ATTRIBUTE_UNUSED;
 449      bfd_reloc_code_real_type code;
 450 {
 451   unsigned int i;
 452
 453   for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
 454     if (cris_reloc_map [i].bfd_reloc_val == code)
 455       return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
 456
 457   return NULL;
 458 }
 459
 460 /* Set the howto pointer for an CRIS ELF reloc.  */
 461
 462 static void
 463 cris_info_to_howto_rela (abfd, cache_ptr, dst)
 464      bfd * abfd ATTRIBUTE_UNUSED;
 465      arelent * cache_ptr;
 466      Elf_Internal_Rela * dst;
 467 {
 468   unsigned int r_type;
 469
 470   r_type = ELF32_R_TYPE (dst->r_info);
 471   BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
 472   cache_ptr->howto = & cris_elf_howto_table [r_type];
 473 }
 474
 475 bfd_reloc_status_type
 476 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
 477                       output_bfd, error_message)
 478      bfd *abfd ATTRIBUTE_UNUSED;
 479      arelent *reloc_entry;
 480      asymbol *symbol;
 481      PTR data ATTRIBUTE_UNUSED;
 482      asection *input_section;
 483      bfd *output_bfd;
 484      char **error_message ATTRIBUTE_UNUSED;
 485 {
 486   /* By default (using only bfd_elf_generic_reloc when linking to
 487      non-ELF formats) PC-relative relocs are relative to the beginning
 488      of the reloc.  CRIS PC-relative relocs are relative to the position
 489      *after* the reloc because that's what pre-CRISv32 PC points to
 490      after reading an insn field with that reloc.  (For CRISv32, PC is
 491      actually relative to the start of the insn, but we keep the old
 492      definition.)  Still, we use as much generic machinery as we can.
 493
 494      Only adjust when doing a final link.  */
 495   if (output_bfd == (bfd *) NULL)
 496     reloc_entry->addend -= 1 << reloc_entry->howto->size;
 497
 498   return
 499     bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
 500                            input_section, output_bfd, error_message);
 501 }
 502 \f
 503 /* Support for core dump NOTE sections.
 504    The slightly unintuitive code layout is an attempt to keep at least
 505    some similarities with other ports, hoping to simplify general
 506    changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
 507
 508 static bfd_boolean
 509 cris_elf_grok_prstatus (abfd, note)
 510      bfd *abfd;
 511      Elf_Internal_Note *note;
 512 {
 513   int offset;
 514   size_t size;
 515
 516   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
 517     switch (note->descsz)
 518       {
 519       default:
 520         return FALSE;
 521
 522       case 202:         /* Linux/CRISv32 */
 523         /* pr_cursig */
 524         elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
 525
 526         /* pr_pid */
 527         elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
 528
 529         /* pr_reg */
 530         offset = 70;
 531         size = 128;
 532
 533         break;
 534       }
 535   else
 536     switch (note->descsz)
 537       {
 538       default:
 539         return FALSE;
 540
 541       case 214:         /* Linux/CRIS */
 542         /* pr_cursig */
 543         elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
 544
 545         /* pr_pid */
 546         elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
 547
 548         /* pr_reg */
 549         offset = 70;
 550         size = 140;
 551
 552         break;
 553       }
 554
 555   /* Make a ".reg/999" section.  */
 556   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
 557                                           size, note->descpos + offset);
 558 }
 559
 560 static bfd_boolean
 561 cris_elf_grok_psinfo (abfd, note)
 562      bfd *abfd;
 563      Elf_Internal_Note *note;
 564 {
 565   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
 566     switch (note->descsz)
 567       {
 568       default:
 569         return FALSE;
 570
 571       case 124:         /* Linux/CRISv32 elf_prpsinfo */
 572         elf_tdata (abfd)->core_program
 573           = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 574         elf_tdata (abfd)->core_command
 575           = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 576       }
 577   else
 578     switch (note->descsz)
 579       {
 580       default:
 581         return FALSE;
 582
 583       case 124:         /* Linux/CRIS elf_prpsinfo */
 584         elf_tdata (abfd)->core_program
 585           = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 586         elf_tdata (abfd)->core_command
 587           = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 588       }
 589
 590   /* Note that for some reason, a spurious space is tacked
 591      onto the end of the args in some (at least one anyway)
 592      implementations, so strip it off if it exists.  */
 593
 594   {
 595     char *command = elf_tdata (abfd)->core_command;
 596     int n = strlen (command);
 597
 598     if (0 < n && command[n - 1] == ' ')
 599       command[n - 1] = '\0';
 600   }
 601
 602   return TRUE;
 603 }
 604 \f
 605 /* The name of the dynamic interpreter.  This is put in the .interp
 606    section.  */
 607
 608 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
 609
 610 /* The size in bytes of an entry in the procedure linkage table.  */
 611
 612 #define PLT_ENTRY_SIZE 20
 613 #define PLT_ENTRY_SIZE_V32 26
 614
 615 /* The first entry in an absolute procedure linkage table looks like this.  */
 616
 617 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
 618 {
 619   0xfc, 0xe1,
 620   0x7e, 0x7e,   /* push mof.  */
 621   0x7f, 0x0d,   /*  (dip [pc+]) */
 622   0, 0, 0, 0,   /*  Replaced with address of .got + 4.  */
 623   0x30, 0x7a,   /* move [...],mof */
 624   0x7f, 0x0d,   /*  (dip [pc+]) */
 625   0, 0, 0, 0,   /*  Replaced with address of .got + 8.  */
 626   0x30, 0x09    /* jump [...] */
 627 };
 628
 629 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
 630 {
 631   0x84, 0xe2,   /* subq 4,$sp */
 632   0x6f, 0xfe,   /* move.d 0,$acr */
 633   0, 0, 0, 0,   /*  Replaced by address of .got + 4.  */
 634   0x7e, 0x7a,   /* move $mof,[$sp] */
 635   0x3f, 0x7a,   /* move [$acr],$mof */
 636   0x04, 0xf2,   /* addq 4,acr */
 637   0x6f, 0xfa,   /* move.d [$acr],$acr */
 638   0xbf, 0x09,   /* jump $acr */
 639   0xb0, 0x05,   /* nop */
 640   0, 0          /*  Pad out to 26 bytes.  */
 641 };
 642
 643 /* Subsequent entries in an absolute procedure linkage table look like
 644    this.  */
 645
 646 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
 647 {
 648   0x7f, 0x0d,   /*  (dip [pc+]) */
 649   0, 0, 0, 0,   /*  Replaced with address of this symbol in .got.  */
 650   0x30, 0x09,   /* jump [...] */
 651   0x3f,  0x7e,  /* move [pc+],mof */
 652   0, 0, 0, 0,   /*  Replaced with offset into relocation table.  */
 653   0x2f, 0xfe,   /* add.d [pc+],pc */
 654   0xec, 0xff,
 655   0xff, 0xff    /*  Replaced with offset to start of .plt.  */
 656 };
 657
 658 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
 659 {
 660   0x6f, 0xfe,   /* move.d 0,$acr */
 661   0, 0, 0, 0,   /*  Replaced with address of this symbol in .got.  */
 662   0x6f, 0xfa,   /* move.d [$acr],$acr */
 663   0xbf, 0x09,   /* jump $acr */
 664   0xb0, 0x05,   /* nop */
 665   0x3f, 0x7e,   /* move 0,mof */
 666   0, 0, 0, 0,   /*  Replaced with offset into relocation table. */
 667   0xbf, 0x0e,   /* ba start_of_plt0_entry */
 668   0, 0, 0, 0,   /*  Replaced with offset to plt0 entry.  */
 669   0xb0, 0x05    /* nop */
 670 };
 671
 672 /* The first entry in a PIC procedure linkage table looks like this.  */
 673
 674 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
 675 {
 676   0xfc, 0xe1, 0x7e, 0x7e,       /* push mof */
 677   0x04, 0x01, 0x30, 0x7a,       /* move [r0+4],mof */
 678   0x08, 0x01, 0x30, 0x09,       /* jump [r0+8] */
 679   0, 0, 0, 0, 0, 0, 0, 0,       /*  Pad out to 20 bytes.  */
 680 };
 681
 682 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
 683 {
 684   0x84, 0xe2,   /* subq 4,$sp */
 685   0x04, 0x01,   /* addoq 4,$r0,$acr */
 686   0x7e, 0x7a,   /* move $mof,[$sp] */
 687   0x3f, 0x7a,   /* move [$acr],$mof */
 688   0x04, 0xf2,   /* addq 4,$acr */
 689   0x6f, 0xfa,   /* move.d [$acr],$acr */
 690   0xbf, 0x09,   /* jump $acr */
 691   0xb0, 0x05,   /* nop */
 692   0, 0,         /*  Pad out to 26 bytes.  */
 693   0, 0, 0, 0,
 694   0, 0, 0, 0
 695 };
 696
 697 /* Subsequent entries in a PIC procedure linkage table look like this.  */
 698
 699 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
 700 {
 701   0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
 702   0, 0, 0, 0,   /*  Replaced with offset of this symbol in .got.  */
 703   0x30, 0x09,   /* jump [...] */
 704   0x3f, 0x7e,   /* move [pc+],mof */
 705   0, 0, 0, 0,   /*  Replaced with offset into relocation table.  */
 706   0x2f, 0xfe,   /* add.d [pc+],pc */
 707   0xec, 0xff,   /*  Replaced with offset to start of .plt.  */
 708   0xff, 0xff
 709 };
 710
 711 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
 712 {
 713   0x6f, 0x0d,   /* addo.d 0,$r0,$acr */
 714   0, 0, 0, 0,   /*  Replaced with offset of this symbol in .got.  */
 715   0x6f, 0xfa,   /* move.d [$acr],$acr */
 716   0xbf, 0x09,   /* jump $acr */
 717   0xb0, 0x05,   /* nop */
 718   0x3f, 0x7e,   /* move relocoffs,$mof */
 719   0, 0, 0, 0,   /*  Replaced with offset into relocation table.  */
 720   0xbf, 0x0e,   /* ba start_of_plt */
 721   0, 0, 0, 0,   /*  Replaced with offset to start of .plt.  */
 722   0xb0, 0x05    /* nop */
 723 };
 724 \f
 725 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
 726    (and most other PIC/shlib stuff).  Check that we don't drift away
 727    without reason.
 728
 729    The CRIS linker, like the m68k and i386 linkers (and probably the rest
 730    too) needs to keep track of the number of relocs that it decides to
 731    copy in check_relocs for each symbol.  This is so that it can discard
 732    PC relative relocs if it doesn't need them when linking with
 733    -Bsymbolic.  We store the information in a field extending the regular
 734    ELF linker hash table.  */
 735
 736 /* This structure keeps track of the number of PC relative relocs we have
 737    copied for a given symbol.  */
 738
 739 struct elf_cris_pcrel_relocs_copied
 740 {
 741   /* Next section.  */
 742   struct elf_cris_pcrel_relocs_copied *next;
 743   /* A section in dynobj.  */
 744   asection *section;
 745   /* Number of relocs copied in this section.  */
 746   bfd_size_type count;
 747 };
 748
 749 /* CRIS ELF linker hash entry.  */
 750
 751 struct elf_cris_link_hash_entry
 752 {
 753   struct elf_link_hash_entry root;
 754
 755   /* Number of PC relative relocs copied for this symbol.  */
 756   struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
 757
 758   /* The GOTPLT references are CRIS-specific; the goal is to avoid having
 759      both a general GOT and a PLT-specific GOT entry for the same symbol,
 760      when it is referenced both as a function and as a function pointer.
 761
 762      Number of GOTPLT references for a function.  */
 763   bfd_signed_vma gotplt_refcount;
 764
 765   /* Actual GOTPLT index for this symbol, if applicable, or zero if not
 766      (zero is never used as an index).  FIXME: We should be able to fold
 767      this with gotplt_refcount in a union, like the got and plt unions in
 768      elf_link_hash_entry.  */
 769   bfd_size_type gotplt_offset;
 770 };
 771
 772 /* CRIS ELF linker hash table.  */
 773
 774 struct elf_cris_link_hash_table
 775 {
 776   struct elf_link_hash_table root;
 777
 778   /* We can't use the PLT offset and calculate to get the GOTPLT offset,
 779      since we try and avoid creating GOTPLT:s when there's already a GOT.
 780      Instead, we keep and update the next available index here.  */
 781   bfd_size_type next_gotplt_entry;
 782 };
 783
 784 /* Traverse a CRIS ELF linker hash table.  */
 785
 786 #define elf_cris_link_hash_traverse(table, func, info)                  \
 787   (elf_link_hash_traverse                                               \
 788    (&(table)->root,                                                     \
 789     (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
 790     (info)))
 791
 792 /* Get the CRIS ELF linker hash table from a link_info structure.  */
 793
 794 #define elf_cris_hash_table(p) \
 795   ((struct elf_cris_link_hash_table *) (p)->hash)
 796
 797 /* Create an entry in a CRIS ELF linker hash table.  */
 798
 799 static struct bfd_hash_entry *
 800 elf_cris_link_hash_newfunc (entry, table, string)
 801      struct bfd_hash_entry *entry;
 802      struct bfd_hash_table *table;
 803      const char *string;
 804 {
 805   struct elf_cris_link_hash_entry *ret =
 806     (struct elf_cris_link_hash_entry *) entry;
 807
 808   /* Allocate the structure if it has not already been allocated by a
 809      subclass.  */
 810   if (ret == (struct elf_cris_link_hash_entry *) NULL)
 811     ret = ((struct elf_cris_link_hash_entry *)
 812            bfd_hash_allocate (table,
 813                               sizeof (struct elf_cris_link_hash_entry)));
 814   if (ret == (struct elf_cris_link_hash_entry *) NULL)
 815     return (struct bfd_hash_entry *) ret;
 816
 817   /* Call the allocation method of the superclass.  */
 818   ret = ((struct elf_cris_link_hash_entry *)
 819          _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
 820                                      table, string));
 821   if (ret != (struct elf_cris_link_hash_entry *) NULL)
 822     {
 823       ret->pcrel_relocs_copied = NULL;
 824       ret->gotplt_refcount = 0;
 825       ret->gotplt_offset = 0;
 826     }
 827
 828   return (struct bfd_hash_entry *) ret;
 829 }
 830
 831 /* Create a CRIS ELF linker hash table.  */
 832
 833 static struct bfd_link_hash_table *
 834 elf_cris_link_hash_table_create (abfd)
 835      bfd *abfd;
 836 {
 837   struct elf_cris_link_hash_table *ret;
 838   bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
 839
 840   ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
 841   if (ret == (struct elf_cris_link_hash_table *) NULL)
 842     return NULL;
 843
 844   if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
 845                                       elf_cris_link_hash_newfunc,
 846                                       sizeof (struct elf_cris_link_hash_entry)))
 847     {
 848       free (ret);
 849       return NULL;
 850     }
 851
 852   /* Initialize to skip over the first three entries in the gotplt; they
 853      are used for run-time symbol evaluation.  */
 854   ret->next_gotplt_entry = 12;
 855
 856   return &ret->root.root;
 857 }
 858 \f
 859 /* Perform a single relocation.  By default we use the standard BFD
 860    routines, with a few tweaks.  */
 861
 862 static bfd_reloc_status_type
 863 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
 864                           relocation)
 865      reloc_howto_type *  howto;
 866      bfd *               input_bfd;
 867      asection *          input_section;
 868      bfd_byte *          contents;
 869      Elf_Internal_Rela * rel;
 870      bfd_vma             relocation;
 871 {
 872   bfd_reloc_status_type r;
 873
 874   /* PC-relative relocations are relative to the position *after*
 875      the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
 876      not a single byte, since PC must be 16-bit-aligned.  */
 877   switch (ELF32_R_TYPE (rel->r_info))
 878     {
 879       /* Check that the 16-bit GOT relocs are positive.  */
 880     case R_CRIS_16_GOTPLT:
 881     case R_CRIS_16_GOT:
 882       if ((bfd_signed_vma) relocation < 0)
 883         return bfd_reloc_overflow;
 884       break;
 885
 886     case R_CRIS_32_PLT_PCREL:
 887     case R_CRIS_32_PCREL:
 888       relocation -= 2;
 889       /* Fall through.  */
 890     case R_CRIS_8_PCREL:
 891     case R_CRIS_16_PCREL:
 892       relocation -= 2;
 893       break;
 894
 895     default:
 896       break;
 897     }
 898
 899   r = _bfd_final_link_relocate (howto, input_bfd, input_section,
 900                                 contents, rel->r_offset,
 901                                 relocation, rel->r_addend);
 902   return r;
 903 }
 904 \f
 905 /* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
 906    copied, for further comments.  */
 907
 908 static bfd_boolean
 909 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
 910                            contents, relocs, local_syms, local_sections)
 911      bfd *output_bfd ATTRIBUTE_UNUSED;
 912      struct bfd_link_info *info;
 913      bfd *input_bfd;
 914      asection *input_section;
 915      bfd_byte *contents;
 916      Elf_Internal_Rela *relocs;
 917      Elf_Internal_Sym *local_syms;
 918      asection **local_sections;
 919 {
 920   bfd *dynobj;
 921   Elf_Internal_Shdr *symtab_hdr;
 922   struct elf_link_hash_entry **sym_hashes;
 923   bfd_vma *local_got_offsets;
 924   asection *sgot;
 925   asection *splt;
 926   asection *sreloc;
 927   Elf_Internal_Rela *rel;
 928   Elf_Internal_Rela *relend;
 929
 930   if (info->relocatable)
 931     return TRUE;
 932
 933   dynobj = elf_hash_table (info)->dynobj;
 934   local_got_offsets = elf_local_got_offsets (input_bfd);
 935   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
 936   sym_hashes = elf_sym_hashes (input_bfd);
 937   relend     = relocs + input_section->reloc_count;
 938
 939   sgot = NULL;
 940   splt = NULL;
 941   sreloc = NULL;
 942
 943   if (dynobj != NULL)
 944     {
 945       splt = bfd_get_section_by_name (dynobj, ".plt");
 946       sgot = bfd_get_section_by_name (dynobj, ".got");
 947     }
 948
 949   for (rel = relocs; rel < relend; rel ++)
 950     {
 951       reloc_howto_type *howto;
 952       unsigned long r_symndx;
 953       Elf_Internal_Sym *sym;
 954       asection *sec;
 955       struct elf_link_hash_entry *h;
 956       bfd_vma relocation;
 957       bfd_reloc_status_type r;
 958       const char *symname = NULL;
 959       int r_type;
 960
 961       r_type = ELF32_R_TYPE (rel->r_info);
 962
 963       if (   r_type == R_CRIS_GNU_VTINHERIT
 964           || r_type == R_CRIS_GNU_VTENTRY)
 965         continue;
 966
 967       /* This is a final link.  */
 968       r_symndx = ELF32_R_SYM (rel->r_info);
 969       howto  = cris_elf_howto_table + r_type;
 970       h      = NULL;
 971       sym    = NULL;
 972       sec    = NULL;
 973
 974       if (r_symndx < symtab_hdr->sh_info)
 975         {
 976           sym = local_syms + r_symndx;
 977           sec = local_sections [r_symndx];
 978           relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
 979
 980           symname = (bfd_elf_string_from_elf_section
 981                      (input_bfd, symtab_hdr->sh_link, sym->st_name));
 982           if (symname == NULL)
 983             symname = bfd_section_name (input_bfd, sec);
 984         }
 985       else
 986         {
 987           bfd_boolean warned;
 988           bfd_boolean unresolved_reloc;
 989
 990           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
 991                                    r_symndx, symtab_hdr, sym_hashes,
 992                                    h, sec, relocation,
 993                                    unresolved_reloc, warned);
 994
 995           if (unresolved_reloc
 996               /* Perhaps we should detect the cases that
 997                  sec->output_section is expected to be NULL like i386 and
 998                  m68k, but apparently (and according to elfxx-ia64.c) all
 999                  valid cases are where the symbol is defined in a shared
1000                  object which we link dynamically against.  This includes
1001                  PLT relocs for which we've created a PLT entry and other
1002                  relocs for which we're prepared to create dynamic
1003                  relocations.
1004
1005                  For now, new situations cause us to just err when
1006                  sec->output_offset is NULL but the object with the symbol
1007                  is *not* dynamically linked against.  Thus this will
1008                  automatically remind us so we can see if there are other
1009                  valid cases we need to revisit.  */
1010               && (sec->owner->flags & DYNAMIC) != 0)
1011             relocation = 0;
1012
1013           else if (h->root.type == bfd_link_hash_defined
1014                    || h->root.type == bfd_link_hash_defweak)
1015             {
1016               /* Here follow the cases where the relocation value must
1017                  be zero (or when further handling is simplified when
1018                  zero).  I can't claim to understand the various
1019                  conditions and they weren't described in the files
1020                  where I copied them from (elf32-m68k.c and
1021                  elf32-i386.c), but let's mention examples of where
1022                  they happen.  FIXME: Perhaps define and use a
1023                  dynamic_symbol_p function like ia64.
1024
1025                  - When creating a shared library, we can have an
1026                  ordinary relocation for a symbol defined in a shared
1027                  library (perhaps the one we create).  We then make
1028                  the relocation value zero, as the value seen now will
1029                  be added into the relocation addend in this shared
1030                  library, but must be handled only at dynamic-link
1031                  time.  FIXME: Not sure this example covers the
1032                  h->elf_link_hash_flags test, though it's there in
1033                  other targets.  */
1034               if (info->shared
1035                   && ((! info->symbolic && h->dynindx != -1)
1036                       || !h->def_regular)
1037                   && (input_section->flags & SEC_ALLOC) != 0
1038                   && (r_type == R_CRIS_8
1039                       || r_type == R_CRIS_16
1040                       || r_type == R_CRIS_32
1041                       || r_type == R_CRIS_8_PCREL
1042                       || r_type == R_CRIS_16_PCREL
1043                       || r_type == R_CRIS_32_PCREL))
1044                 relocation = 0;
1045               else if (unresolved_reloc)
1046                 {
1047                   _bfd_error_handler
1048                     (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1049                      input_bfd,
1050                      input_section,
1051                      cris_elf_howto_table[r_type].name,
1052                      symname);
1053                   bfd_set_error (bfd_error_bad_value);
1054                   return FALSE;
1055                 }
1056             }
1057         }
1058
1059       switch (r_type)
1060         {
1061         case R_CRIS_16_GOTPLT:
1062         case R_CRIS_32_GOTPLT:
1063           /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1064              but we require a PLT, and the PLT handling will take care of
1065              filling in the PLT-specific GOT entry.  For the GOT offset,
1066              calculate it as we do when filling it in for the .got.plt
1067              section.  If we don't have a PLT, punt to GOT handling.  */
1068           if (h != NULL
1069               && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1070             {
1071               asection *sgotplt
1072                 = bfd_get_section_by_name (dynobj, ".got.plt");
1073               bfd_vma got_offset;
1074
1075               BFD_ASSERT (h->dynindx != -1);
1076               BFD_ASSERT (sgotplt != NULL);
1077
1078               got_offset
1079                 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1080
1081               relocation = got_offset;
1082               break;
1083             }
1084
1085           /* We didn't make a PLT entry for this symbol.  Maybe everything is
1086              folded into the GOT.  Other than folding, this happens when
1087              statically linking PIC code, or when using -Bsymbolic.  Check
1088              that we instead have a GOT entry as done for us by
1089              elf_cris_adjust_dynamic_symbol, and drop through into the
1090              ordinary GOT cases.  This must not happen for the
1091              executable, because any reference it does to a function
1092              that is satisfied by a DSO must generate a PLT.  We assume
1093              these call-specific relocs don't address non-functions.  */
1094           if (h != NULL
1095               && (h->got.offset == (bfd_vma) -1
1096                   || (!info->shared
1097                       && !(h->def_regular
1098                            || (!h->def_dynamic
1099                                && h->root.type == bfd_link_hash_undefweak)))))
1100             {
1101               (*_bfd_error_handler)
1102                 ((h->got.offset == (bfd_vma) -1)
1103                  ? _("%B, section %A: No PLT nor GOT for relocation %s"
1104                      " against symbol `%s'")
1105                  : _("%B, section %A: No PLT for relocation %s"
1106                      " against symbol `%s'"),
1107                  input_bfd,
1108                  input_section,
1109                  cris_elf_howto_table[r_type].name,
1110                  (symname != NULL && symname[0] != '\0'
1111                   ? symname : _("[whose name is lost]")));
1112
1113               /* FIXME: Perhaps blaming input is not the right thing to
1114                  do; this is probably an internal error.  But it is true
1115                  that we didn't like that particular input.  */
1116               bfd_set_error (bfd_error_bad_value);
1117               return FALSE;
1118             }
1119           /* Fall through.  */
1120
1121           /* The size of the actual relocation is not used here; we only
1122              fill in the GOT table here.  */
1123         case R_CRIS_16_GOT:
1124         case R_CRIS_32_GOT:
1125           {
1126             bfd_vma off;
1127
1128             /* Note that despite using RELA relocations, the .got contents
1129                is always filled in with the link-relative relocation
1130                value; the addend.  */
1131
1132             if (h != NULL)
1133               {
1134                 off = h->got.offset;
1135                 BFD_ASSERT (off != (bfd_vma) -1);
1136
1137                 if (!elf_hash_table (info)->dynamic_sections_created
1138                     || (! info->shared
1139                         && (h->def_regular
1140                             || h->type == STT_FUNC
1141                             || h->needs_plt))
1142                     || (info->shared
1143                         && (info->symbolic || h->dynindx == -1)
1144                         && h->def_regular))
1145                   {
1146                     /* This wasn't checked above for ! info->shared, but
1147                        must hold there if we get here; the symbol must
1148                        be defined in the regular program or be undefweak
1149                        or be a function or otherwise need a PLT.  */
1150                     BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1151                                 || info->shared
1152                                 || h->def_regular
1153                                 || h->type == STT_FUNC
1154                                 || h->needs_plt
1155                                 || h->root.type == bfd_link_hash_undefweak);
1156
1157                     /* This is actually a static link, or it is a
1158                        -Bsymbolic link and the symbol is defined locally,
1159                        or is undefweak, or the symbol was forced to be
1160                        local because of a version file, or we're not
1161                        creating a dynamic object.  We must initialize this
1162                        entry in the global offset table.  Since the offset
1163                        must always be a multiple of 4, we use the least
1164                        significant bit to record whether we have
1165                        initialized it already.
1166
1167                        If this GOT entry should be runtime-initialized, we
1168                        will create a .rela.got relocation entry to
1169                        initialize the value.  This is done in the
1170                        finish_dynamic_symbol routine.  */
1171                     if ((off & 1) != 0)
1172                       off &= ~1;
1173                     else
1174                       {
1175                         bfd_put_32 (output_bfd, relocation,
1176                                     sgot->contents + off);
1177                         h->got.offset |= 1;
1178                       }
1179                   }
1180               }
1181             else
1182               {
1183                 BFD_ASSERT (local_got_offsets != NULL
1184                             && local_got_offsets[r_symndx] != (bfd_vma) -1);
1185
1186                 off = local_got_offsets[r_symndx];
1187
1188                 /* The offset must always be a multiple of 4.  We use
1189                    the least significant bit to record whether we have
1190                    already generated the necessary reloc.  */
1191                 if ((off & 1) != 0)
1192                   off &= ~1;
1193                 else
1194                   {
1195                     bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1196
1197                     if (info->shared)
1198                       {
1199                         asection *s;
1200                         Elf_Internal_Rela outrel;
1201                         bfd_byte *loc;
1202
1203                         s = bfd_get_section_by_name (dynobj, ".rela.got");
1204                         BFD_ASSERT (s != NULL);
1205
1206                         outrel.r_offset = (sgot->output_section->vma
1207                                            + sgot->output_offset
1208                                            + off);
1209                         outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1210                         outrel.r_addend = relocation;
1211                         loc = s->contents;
1212                         loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1213                         bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1214                       }
1215
1216                     local_got_offsets[r_symndx] |= 1;
1217                   }
1218               }
1219
1220             relocation = sgot->output_offset + off;
1221             if (rel->r_addend != 0)
1222               {
1223                 /* We can't do anything for a relocation which is against
1224                    a symbol *plus offset*.  GOT holds relocations for
1225                    symbols.  Make this an error; the compiler isn't
1226                    allowed to pass us these kinds of things.  */
1227                 if (h == NULL)
1228                   (*_bfd_error_handler)
1229                     (_("%B, section %A: relocation %s with non-zero addend %d"
1230                        " against local symbol"),
1231                      input_bfd,
1232                      input_section,
1233                      cris_elf_howto_table[r_type].name,
1234                      rel->r_addend);
1235                 else
1236                   (*_bfd_error_handler)
1237                     (_("%B, section %A: relocation %s with non-zero addend %d"
1238                        " against symbol `%s'"),
1239                      input_bfd,
1240                      input_section,
1241                      cris_elf_howto_table[r_type].name,
1242                      rel->r_addend,
1243                      symname[0] != '\0' ? symname : _("[whose name is lost]"));
1244
1245                 bfd_set_error (bfd_error_bad_value);
1246                 return FALSE;
1247               }
1248           }
1249           break;
1250
1251         case R_CRIS_32_GOTREL:
1252           /* This relocation must only be performed against local symbols.
1253              It's also ok when we link a program and the symbol is either
1254              defined in an ordinary (non-DSO) object or is undefined weak.  */
1255           if (h != NULL
1256               && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1257               && !(!info->shared
1258                    && (h->def_regular
1259                        || (!h->def_dynamic
1260                            && h->root.type == bfd_link_hash_undefweak))))
1261             {
1262               (*_bfd_error_handler)
1263                 (_("%B, section %A: relocation %s is"
1264                    " not allowed for global symbol: `%s'"),
1265                  input_bfd,
1266                  input_section,
1267                  cris_elf_howto_table[r_type].name,
1268                  symname);
1269               bfd_set_error (bfd_error_bad_value);
1270               return FALSE;
1271             }
1272
1273           /* This can happen if we get a link error with the input ELF
1274              variant mismatching the output variant.  Emit an error so
1275              it's noticed if it happens elsewhere.  */
1276           if (sgot == NULL)
1277             {
1278               (*_bfd_error_handler)
1279                 (_("%B, section %A: relocation %s with no GOT created"),
1280                  input_bfd,
1281                  input_section,
1282                  cris_elf_howto_table[r_type].name);
1283               bfd_set_error (bfd_error_bad_value);
1284               return FALSE;
1285             }
1286
1287           /* This relocation is like a PC-relative one, except the
1288              reference point is the location of GOT.  Note that
1289              sgot->output_offset is not involved in this calculation.  We
1290              always want the start of entire .got section, not the
1291              position after the reserved header.  */
1292           relocation -= sgot->output_section->vma;
1293           break;
1294
1295         case R_CRIS_32_PLT_PCREL:
1296           /* Relocation is to the entry for this symbol in the
1297              procedure linkage table.  */
1298
1299           /* Resolve a PLT_PCREL reloc against a local symbol directly,
1300              without using the procedure linkage table.  */
1301           if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1302             break;
1303
1304           if (h->plt.offset == (bfd_vma) -1
1305               || splt == NULL)
1306             {
1307               /* We didn't make a PLT entry for this symbol.  This
1308                  happens when statically linking PIC code, or when
1309                  using -Bsymbolic.  */
1310               break;
1311             }
1312
1313           relocation = (splt->output_section->vma
1314                         + splt->output_offset
1315                         + h->plt.offset);
1316           break;
1317
1318         case R_CRIS_32_PLT_GOTREL:
1319           /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1320              start of the .got section.  See also comment at
1321              R_CRIS_32_GOT.  */
1322           relocation -= sgot->output_section->vma;
1323
1324           /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1325              without using the procedure linkage table.  */
1326           if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1327             break;
1328
1329           if (h->plt.offset == (bfd_vma) -1
1330               || splt == NULL)
1331             {
1332               /* We didn't make a PLT entry for this symbol.  This
1333                  happens when statically linking PIC code, or when
1334                  using -Bsymbolic.  */
1335               break;
1336             }
1337
1338           relocation = (splt->output_section->vma
1339                         + splt->output_offset
1340                         + h->plt.offset
1341                         - sgot->output_section->vma);
1342           break;
1343
1344         case R_CRIS_8_PCREL:
1345         case R_CRIS_16_PCREL:
1346         case R_CRIS_32_PCREL:
1347           /* If the symbol was local, we need no shlib-specific handling.  */
1348           if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1349             break;
1350
1351           /* Fall through.  */
1352         case R_CRIS_8:
1353         case R_CRIS_16:
1354         case R_CRIS_32:
1355           if (info->shared
1356               && r_symndx != 0
1357               && (input_section->flags & SEC_ALLOC) != 0
1358               && ((r_type != R_CRIS_8_PCREL
1359                    && r_type != R_CRIS_16_PCREL
1360                    && r_type != R_CRIS_32_PCREL)
1361                   || (!info->symbolic
1362                       || !h->def_regular)))
1363             {
1364               Elf_Internal_Rela outrel;
1365               bfd_byte *loc;
1366               bfd_boolean skip, relocate;
1367
1368               /* When generating a shared object, these relocations
1369                  are copied into the output file to be resolved at run
1370                  time.  */
1371
1372               if (sreloc == NULL)
1373                 {
1374                   const char *name;
1375
1376                   name = (bfd_elf_string_from_elf_section
1377                           (input_bfd,
1378                            elf_elfheader (input_bfd)->e_shstrndx,
1379                            elf_section_data (input_section)->rel_hdr.sh_name));
1380                   if (name == NULL)
1381                     return FALSE;
1382
1383                   BFD_ASSERT (CONST_STRNEQ (name, ".rela")
1384                               && strcmp (bfd_get_section_name (input_bfd,
1385                                                                input_section),
1386                                          name + 5) == 0);
1387
1388                   sreloc = bfd_get_section_by_name (dynobj, name);
1389
1390                   /* That section should have been created in
1391                      cris_elf_check_relocs, but that function will not be
1392                      called for objects which fail in
1393                      cris_elf_merge_private_bfd_data.  */
1394                   if (sreloc == NULL)
1395                     {
1396                       (*_bfd_error_handler)
1397                         (_("%B: Internal inconsistency; no relocation section %s"),
1398                          input_bfd,
1399                          name);
1400
1401                       bfd_set_error (bfd_error_bad_value);
1402                       return FALSE;
1403                     }
1404                 }
1405
1406               skip = FALSE;
1407               relocate = FALSE;
1408
1409               outrel.r_offset =
1410                 _bfd_elf_section_offset (output_bfd, info, input_section,
1411                                          rel->r_offset);
1412               if (outrel.r_offset == (bfd_vma) -1)
1413                 skip = TRUE;
1414               else if (outrel.r_offset == (bfd_vma) -2)
1415                 skip = TRUE, relocate = TRUE;
1416               outrel.r_offset += (input_section->output_section->vma
1417                                   + input_section->output_offset);
1418
1419               if (skip)
1420                 memset (&outrel, 0, sizeof outrel);
1421               /* h->dynindx may be -1 if the symbol was marked to
1422                  become local.  */
1423               else if (h != NULL
1424                        && ((! info->symbolic && h->dynindx != -1)
1425                            || !h->def_regular))
1426                 {
1427                   BFD_ASSERT (h->dynindx != -1);
1428                   outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1429                   outrel.r_addend = relocation + rel->r_addend;
1430                 }
1431               else
1432                 {
1433                   outrel.r_addend = relocation + rel->r_addend;
1434
1435                   if (r_type == R_CRIS_32)
1436                     {
1437                       relocate = TRUE;
1438                       outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1439                     }
1440                   else
1441                     {
1442                       long indx;
1443
1444                       if (bfd_is_abs_section (sec))
1445                         indx = 0;
1446                       else if (sec == NULL || sec->owner == NULL)
1447                         {
1448                           bfd_set_error (bfd_error_bad_value);
1449                           return FALSE;
1450                         }
1451                       else
1452                         {
1453                           asection *osec;
1454
1455                           /* We are turning this relocation into one
1456                              against a section symbol.  It would be
1457                              proper to subtract the symbol's value,
1458                              osec->vma, from the emitted reloc addend,
1459                              but ld.so expects buggy relocs.  */
1460                           osec = sec->output_section;
1461                           indx = elf_section_data (osec)->dynindx;
1462                           if (indx == 0)
1463                             {
1464                               struct elf_cris_link_hash_table *htab;
1465                               htab = elf_cris_hash_table (info);
1466                               osec = htab->root.text_index_section;
1467                               indx = elf_section_data (osec)->dynindx;
1468                             }
1469                           BFD_ASSERT (indx != 0);
1470                         }
1471
1472                       outrel.r_info = ELF32_R_INFO (indx, r_type);
1473                     }
1474                 }
1475
1476               loc = sreloc->contents;
1477               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1478               bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1479
1480               /* This reloc will be computed at runtime, so there's no
1481                  need to do anything now, except for R_CRIS_32 relocations
1482                  that have been turned into R_CRIS_RELATIVE.  */
1483               if (!relocate)
1484                 continue;
1485             }
1486
1487           break;
1488         }
1489
1490       r = cris_final_link_relocate (howto, input_bfd, input_section,
1491                                      contents, rel, relocation);
1492
1493       if (r != bfd_reloc_ok)
1494         {
1495           const char * msg = (const char *) NULL;
1496
1497           switch (r)
1498             {
1499             case bfd_reloc_overflow:
1500               r = info->callbacks->reloc_overflow
1501                 (info, (h ? &h->root : NULL), symname, howto->name,
1502                  (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1503               break;
1504
1505             case bfd_reloc_undefined:
1506               r = info->callbacks->undefined_symbol
1507                 (info, symname, input_bfd, input_section, rel->r_offset,
1508                  TRUE);
1509               break;
1510
1511             case bfd_reloc_outofrange:
1512               msg = _("internal error: out of range error");
1513               break;
1514
1515             case bfd_reloc_notsupported:
1516               msg = _("internal error: unsupported relocation error");
1517               break;
1518
1519             case bfd_reloc_dangerous:
1520               msg = _("internal error: dangerous relocation");
1521               break;
1522
1523             default:
1524               msg = _("internal error: unknown error");
1525               break;
1526             }
1527
1528           if (msg)
1529             r = info->callbacks->warning
1530               (info, msg, symname, input_bfd, input_section, rel->r_offset);
1531
1532           if (! r)
1533             return FALSE;
1534         }
1535     }
1536
1537   return TRUE;
1538 }
1539 \f
1540 /* Finish up dynamic symbol handling.  We set the contents of various
1541    dynamic sections here.  */
1542
1543 static bfd_boolean
1544 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
1545      bfd *output_bfd;
1546      struct bfd_link_info *info;
1547      struct elf_link_hash_entry *h;
1548      Elf_Internal_Sym *sym;
1549 {
1550   bfd *dynobj;
1551
1552   /* Where in the plt entry to put values.  */
1553   int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
1554
1555   /* What offset to add to the distance to the first PLT entry for the
1556      value at plt_off3.   */
1557   int plt_off3_value_bias = 4;
1558
1559   /* Where in the PLT entry the call-dynlink-stub is (happens to be same
1560      for PIC and non-PIC for v32 and pre-v32).  */
1561   int plt_stub_offset = 8;
1562   int plt_entry_size = PLT_ENTRY_SIZE;
1563   const bfd_byte *plt_entry = elf_cris_plt_entry;
1564   const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
1565
1566   /* Adjust the various PLT entry offsets.  */
1567   if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1568     {
1569       plt_off2 = 14;
1570       plt_off3 = 20;
1571       plt_off3_value_bias = -2;
1572       plt_stub_offset = 12;
1573       plt_entry_size = PLT_ENTRY_SIZE_V32;
1574       plt_entry = elf_cris_plt_entry_v32;
1575       plt_pic_entry = elf_cris_pic_plt_entry_v32;
1576     }
1577
1578   dynobj = elf_hash_table (info)->dynobj;
1579
1580   if (h->plt.offset != (bfd_vma) -1)
1581     {
1582       asection *splt;
1583       asection *sgotplt;
1584       asection *sgot;
1585       asection *srela;
1586       bfd_vma got_base;
1587
1588       bfd_vma gotplt_offset
1589         = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1590       Elf_Internal_Rela rela;
1591       bfd_byte *loc;
1592       bfd_boolean has_gotplt = gotplt_offset != 0;
1593
1594       /* Get the index in the procedure linkage table which
1595          corresponds to this symbol.  This is the index of this symbol
1596          in all the symbols for which we are making plt entries.  The
1597          first entry in the procedure linkage table is reserved.  */
1598       /* We have to count backwards here, and the result is only valid as
1599          an index into .got.plt and its relocations.  FIXME: Constants...  */
1600       bfd_vma gotplt_index = gotplt_offset/4 - 3;
1601
1602       /* Get the offset into the .got table of the entry that corresponds
1603          to this function.  Note that we embed knowledge that "incoming"
1604          .got goes after .got.plt in the output without padding (pointer
1605          aligned).  However, that knowledge is present in several other
1606          places too.  */
1607       bfd_vma got_offset
1608         = (has_gotplt
1609            ? gotplt_offset
1610            : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
1611
1612       /* This symbol has an entry in the procedure linkage table.  Set it
1613          up.  */
1614
1615       BFD_ASSERT (h->dynindx != -1);
1616
1617       splt = bfd_get_section_by_name (dynobj, ".plt");
1618       sgot = bfd_get_section_by_name (dynobj, ".got");
1619       sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1620       srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1621       BFD_ASSERT (splt != NULL && sgotplt != NULL
1622                   && (! has_gotplt || srela != NULL));
1623
1624       got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1625
1626       /* Fill in the entry in the procedure linkage table.  */
1627       if (! info->shared)
1628         {
1629           memcpy (splt->contents + h->plt.offset, plt_entry,
1630                   plt_entry_size);
1631
1632           /* We need to enter the absolute address of the GOT entry here.  */
1633           bfd_put_32 (output_bfd, got_base + got_offset,
1634                       splt->contents + h->plt.offset + plt_off1);
1635         }
1636       else
1637         {
1638           memcpy (splt->contents + h->plt.offset, plt_pic_entry,
1639                   plt_entry_size);
1640           bfd_put_32 (output_bfd, got_offset,
1641                       splt->contents + h->plt.offset + plt_off1);
1642         }
1643
1644       /* Fill in the plt entry and make a relocation, if this is a "real"
1645          PLT entry.  */
1646       if (has_gotplt)
1647         {
1648           /* Fill in the offset to the reloc table.  */
1649           bfd_put_32 (output_bfd,
1650                       gotplt_index * sizeof (Elf32_External_Rela),
1651                       splt->contents + h->plt.offset + plt_off2);
1652
1653           /* Fill in the offset to the first PLT entry, where to "jump".  */
1654           bfd_put_32 (output_bfd,
1655                       - (h->plt.offset + plt_off3 + plt_off3_value_bias),
1656                       splt->contents + h->plt.offset + plt_off3);
1657
1658           /* Fill in the entry in the global offset table with the address of
1659              the relocating stub.  */
1660           bfd_put_32 (output_bfd,
1661                       (splt->output_section->vma
1662                        + splt->output_offset
1663                        + h->plt.offset
1664                        + plt_stub_offset),
1665                       sgotplt->contents + got_offset);
1666
1667           /* Fill in the entry in the .rela.plt section.  */
1668           rela.r_offset = (sgotplt->output_section->vma
1669                            + sgotplt->output_offset
1670                            + got_offset);
1671           rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
1672           rela.r_addend = 0;
1673           loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
1674           bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1675         }
1676
1677       if (!h->def_regular)
1678         {
1679           /* Mark the symbol as undefined, rather than as defined in
1680              the .plt section.  Leave the value alone.  */
1681           sym->st_shndx = SHN_UNDEF;
1682
1683           /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
1684              know whether resetting the value is significant; if it really
1685              is, rather than a quirk or bug in the sparc port, then I
1686              believe we'd see this elsewhere.  */
1687           /* If the symbol is weak, we do need to clear the value.
1688              Otherwise, the PLT entry would provide a definition for
1689              the symbol even if the symbol wasn't defined anywhere,
1690              and so the symbol would never be NULL.  */
1691           if (!h->ref_regular_nonweak)
1692             sym->st_value = 0;
1693         }
1694     }
1695
1696   /* For an ordinary program, we emit .got relocs only for symbols that
1697      are in the dynamic-symbols table and are either defined by the
1698      program or are undefined weak symbols, or are function symbols
1699      where we do not output a PLT: the PLT reloc was output above and all
1700      references to the function symbol are redirected to the PLT.  */
1701   if (h->got.offset != (bfd_vma) -1
1702       && (info->shared
1703           || (h->dynindx != -1
1704               && h->plt.offset == (bfd_vma) -1
1705               && !h->def_regular
1706               && h->root.type != bfd_link_hash_undefweak)))
1707     {
1708       asection *sgot;
1709       asection *srela;
1710       Elf_Internal_Rela rela;
1711       bfd_byte *loc;
1712       bfd_byte *where;
1713
1714       /* This symbol has an entry in the global offset table.  Set it up.  */
1715
1716       sgot = bfd_get_section_by_name (dynobj, ".got");
1717       srela = bfd_get_section_by_name (dynobj, ".rela.got");
1718       BFD_ASSERT (sgot != NULL && srela != NULL);
1719
1720       rela.r_offset = (sgot->output_section->vma
1721                        + sgot->output_offset
1722                        + (h->got.offset &~ (bfd_vma) 1));
1723
1724       /* If this is a static link, or it is a -Bsymbolic link and the
1725          symbol is defined locally or was forced to be local because
1726          of a version file, we just want to emit a RELATIVE reloc.
1727          The entry in the global offset table will already have been
1728          initialized in the relocate_section function.  */
1729       where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
1730       if (! elf_hash_table (info)->dynamic_sections_created
1731           || (info->shared
1732               && (info->symbolic || h->dynindx == -1)
1733               && h->def_regular))
1734         {
1735           rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1736           rela.r_addend = bfd_get_signed_32 (output_bfd, where);
1737         }
1738       else
1739         {
1740           bfd_put_32 (output_bfd, (bfd_vma) 0, where);
1741           rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
1742           rela.r_addend = 0;
1743         }
1744
1745       loc = srela->contents;
1746       loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1747       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1748     }
1749
1750   if (h->needs_copy)
1751     {
1752       asection *s;
1753       Elf_Internal_Rela rela;
1754       bfd_byte *loc;
1755
1756       /* This symbol needs a copy reloc.  Set it up.  */
1757
1758       BFD_ASSERT (h->dynindx != -1
1759                   && (h->root.type == bfd_link_hash_defined
1760                       || h->root.type == bfd_link_hash_defweak));
1761
1762       s = bfd_get_section_by_name (h->root.u.def.section->owner,
1763                                    ".rela.bss");
1764       BFD_ASSERT (s != NULL);
1765
1766       rela.r_offset = (h->root.u.def.value
1767                        + h->root.u.def.section->output_section->vma
1768                        + h->root.u.def.section->output_offset);
1769       rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
1770       rela.r_addend = 0;
1771       loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1772       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1773     }
1774
1775   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
1776   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1777       || h == elf_hash_table (info)->hgot)
1778     sym->st_shndx = SHN_ABS;
1779
1780   return TRUE;
1781 }
1782 \f
1783 /* Finish up the dynamic sections.  */
1784
1785 static bfd_boolean
1786 elf_cris_finish_dynamic_sections (output_bfd, info)
1787      bfd *output_bfd;
1788      struct bfd_link_info *info;
1789 {
1790   bfd *dynobj;
1791   asection *sgot;
1792   asection *sdyn;
1793
1794   dynobj = elf_hash_table (info)->dynobj;
1795
1796   sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1797   BFD_ASSERT (sgot != NULL);
1798   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1799
1800   if (elf_hash_table (info)->dynamic_sections_created)
1801     {
1802       asection *splt;
1803       Elf32_External_Dyn *dyncon, *dynconend;
1804
1805       splt = bfd_get_section_by_name (dynobj, ".plt");
1806       BFD_ASSERT (splt != NULL && sdyn != NULL);
1807
1808       dyncon = (Elf32_External_Dyn *) sdyn->contents;
1809       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1810       for (; dyncon < dynconend; dyncon++)
1811         {
1812           Elf_Internal_Dyn dyn;
1813           asection *s;
1814
1815           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1816
1817           switch (dyn.d_tag)
1818             {
1819             default:
1820               break;
1821
1822             case DT_PLTGOT:
1823               s = bfd_get_section_by_name (output_bfd, ".got");
1824               BFD_ASSERT (s != NULL);
1825               dyn.d_un.d_ptr = s->vma;
1826               bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1827               break;
1828
1829             case DT_JMPREL:
1830               /* Yes, we *can* have a .plt and no .plt.rela, for instance
1831                  if all symbols are found in the .got (not .got.plt).  */
1832               s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1833               dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
1834               bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1835               break;
1836
1837             case DT_PLTRELSZ:
1838               s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1839               if (s == NULL)
1840                 dyn.d_un.d_val = 0;
1841               else
1842                 dyn.d_un.d_val = s->size;
1843               bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1844               break;
1845
1846             case DT_RELASZ:
1847               /* The procedure linkage table relocs (DT_JMPREL) should
1848                  not be included in the overall relocs (DT_RELA).
1849                  Therefore, we override the DT_RELASZ entry here to
1850                  make it not include the JMPREL relocs.  Since the
1851                  linker script arranges for .rela.plt to follow all
1852                  other relocation sections, we don't have to worry
1853                  about changing the DT_RELA entry.  */
1854               s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1855               if (s != NULL)
1856                 dyn.d_un.d_val -= s->size;
1857               bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1858               break;
1859             }
1860         }
1861
1862       /* Fill in the first entry in the procedure linkage table.  */
1863       if (splt->size > 0)
1864         {
1865           if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1866             {
1867               if (info->shared)
1868                 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
1869                         PLT_ENTRY_SIZE_V32);
1870               else
1871                 {
1872                   memcpy (splt->contents, elf_cris_plt0_entry_v32,
1873                           PLT_ENTRY_SIZE_V32);
1874                   bfd_put_32 (output_bfd,
1875                               sgot->output_section->vma
1876                               + sgot->output_offset + 4,
1877                               splt->contents + 4);
1878
1879                   elf_section_data (splt->output_section)->this_hdr.sh_entsize
1880                     = PLT_ENTRY_SIZE_V32;
1881                 }
1882             }
1883           else
1884             {
1885               if (info->shared)
1886                 memcpy (splt->contents, elf_cris_pic_plt0_entry,
1887                         PLT_ENTRY_SIZE);
1888               else
1889                 {
1890                   memcpy (splt->contents, elf_cris_plt0_entry,
1891                           PLT_ENTRY_SIZE);
1892                   bfd_put_32 (output_bfd,
1893                               sgot->output_section->vma
1894                               + sgot->output_offset + 4,
1895                               splt->contents + 6);
1896                   bfd_put_32 (output_bfd,
1897                               sgot->output_section->vma
1898                               + sgot->output_offset + 8,
1899                               splt->contents + 14);
1900
1901                   elf_section_data (splt->output_section)->this_hdr.sh_entsize
1902                     = PLT_ENTRY_SIZE;
1903                 }
1904             }
1905         }
1906     }
1907
1908   /* Fill in the first three entries in the global offset table.  */
1909   if (sgot->size > 0)
1910     {
1911       if (sdyn == NULL)
1912         bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1913       else
1914         bfd_put_32 (output_bfd,
1915                     sdyn->output_section->vma + sdyn->output_offset,
1916                     sgot->contents);
1917       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1918       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1919     }
1920
1921   elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1922
1923   return TRUE;
1924 }
1925 \f
1926 /* Return the section that should be marked against GC for a given
1927    relocation.  */
1928
1929 static asection *
1930 cris_elf_gc_mark_hook (asection *sec,
1931                        struct bfd_link_info *info,
1932                        Elf_Internal_Rela *rel,
1933                        struct elf_link_hash_entry *h,
1934                        Elf_Internal_Sym *sym)
1935 {
1936   if (h != NULL)
1937     switch (ELF32_R_TYPE (rel->r_info))
1938       {
1939       case R_CRIS_GNU_VTINHERIT:
1940       case R_CRIS_GNU_VTENTRY:
1941         return NULL;
1942       }
1943
1944   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1945 }
1946
1947 /* Update the got entry reference counts for the section being removed.  */
1948
1949 static bfd_boolean
1950 cris_elf_gc_sweep_hook (bfd *abfd,
1951                         struct bfd_link_info *info,
1952                         asection *sec,
1953                         const Elf_Internal_Rela *relocs)
1954 {
1955   Elf_Internal_Shdr *symtab_hdr;
1956   struct elf_link_hash_entry **sym_hashes;
1957   bfd_signed_vma *local_got_refcounts;
1958   const Elf_Internal_Rela *rel, *relend;
1959   bfd *dynobj;
1960   asection *sgot;
1961   asection *srelgot;
1962
1963   dynobj = elf_hash_table (info)->dynobj;
1964   if (dynobj == NULL)
1965     return TRUE;
1966
1967   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1968   sym_hashes = elf_sym_hashes (abfd);
1969   local_got_refcounts = elf_local_got_refcounts (abfd);
1970
1971   sgot = bfd_get_section_by_name (dynobj, ".got");
1972   srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1973
1974   relend = relocs + sec->reloc_count;
1975   for (rel = relocs; rel < relend; rel++)
1976     {
1977       unsigned long r_symndx;
1978       struct elf_link_hash_entry *h = NULL;
1979
1980       r_symndx = ELF32_R_SYM (rel->r_info);
1981       if (r_symndx >= symtab_hdr->sh_info)
1982         {
1983           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1984           while (h->root.type == bfd_link_hash_indirect
1985                  || h->root.type == bfd_link_hash_warning)
1986             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1987         }
1988
1989       switch (ELF32_R_TYPE (rel->r_info))
1990         {
1991         case R_CRIS_16_GOT:
1992         case R_CRIS_32_GOT:
1993           if (h != NULL)
1994             {
1995               if (h->got.refcount > 0)
1996                 {
1997                   --h->got.refcount;
1998                   if (h->got.refcount == 0)
1999                     {
2000                       /* We don't need the .got entry any more.  */
2001                       sgot->size -= 4;
2002                       srelgot->size -= sizeof (Elf32_External_Rela);
2003                     }
2004                 }
2005               break;
2006             }
2007
2008         local_got_reloc:
2009           if (local_got_refcounts != NULL)
2010             {
2011               if (local_got_refcounts[r_symndx] > 0)
2012                 {
2013                   --local_got_refcounts[r_symndx];
2014                   if (local_got_refcounts[r_symndx] == 0)
2015                     {
2016                       /* We don't need the .got entry any more.  */
2017                       sgot->size -= 4;
2018                       if (info->shared)
2019                         srelgot->size -= sizeof (Elf32_External_Rela);
2020                     }
2021                 }
2022             }
2023           break;
2024
2025         case R_CRIS_16_GOTPLT:
2026         case R_CRIS_32_GOTPLT:
2027           /* For local symbols, treat these like GOT relocs.  */
2028           if (h == NULL)
2029             goto local_got_reloc;
2030           /* Fall through.  */
2031
2032         case R_CRIS_32_PLT_GOTREL:
2033           /* FIXME: We don't garbage-collect away the .got section.  */
2034           if (local_got_refcounts != NULL)
2035             local_got_refcounts[-1]--;
2036           /* Fall through.  */
2037
2038         case R_CRIS_8_PCREL:
2039         case R_CRIS_16_PCREL:
2040         case R_CRIS_32_PCREL:
2041         case R_CRIS_32_PLT_PCREL:
2042           if (h != NULL)
2043             {
2044               if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2045                   && h->plt.refcount > 0)
2046                 --h->plt.refcount;
2047             }
2048           break;
2049
2050         default:
2051           break;
2052         }
2053     }
2054
2055   return TRUE;
2056 }
2057
2058 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2059    entry but we found we will not create any.  Called when we find we will
2060    not have any PLT for this symbol, by for example
2061    elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2062    or elf_cris_size_dynamic_sections if no dynamic sections will be
2063    created (we're only linking static objects).  */
2064
2065 static bfd_boolean
2066 elf_cris_adjust_gotplt_to_got (h, p)
2067      struct elf_cris_link_hash_entry *h;
2068      PTR p;
2069 {
2070   struct bfd_link_info *info = (struct bfd_link_info *) p;
2071
2072   if (h->root.root.type == bfd_link_hash_warning)
2073     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2074
2075   /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2076   if (h->gotplt_refcount <= 0)
2077     return TRUE;
2078
2079   if (h->root.got.refcount > 0)
2080     {
2081       /* There's a GOT entry for this symbol.  Just adjust the refcount.
2082          Probably not necessary at this stage, but keeping it accurate
2083          helps avoiding surprises later.  */
2084       h->root.got.refcount += h->gotplt_refcount;
2085       h->gotplt_refcount = 0;
2086     }
2087   else
2088     {
2089       /* No GOT entry for this symbol.  We need to create one.  */
2090       bfd *dynobj = elf_hash_table (info)->dynobj;
2091       asection *sgot;
2092       asection *srelgot;
2093
2094       BFD_ASSERT (dynobj != NULL);
2095       sgot = bfd_get_section_by_name (dynobj, ".got");
2096       srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2097
2098       /* Put an accurate refcount there.  */
2099       h->root.got.refcount = h->gotplt_refcount;
2100
2101       h->gotplt_refcount = 0;
2102
2103       /* We always have a .got and a .rela.got section if there were
2104          GOTPLT relocs in input.  */
2105       BFD_ASSERT (sgot != NULL && srelgot != NULL);
2106
2107       /* Allocate space in the .got section.  */
2108       sgot->size += 4;
2109
2110       /* Allocate relocation space.  */
2111       srelgot->size += sizeof (Elf32_External_Rela);
2112     }
2113
2114   return TRUE;
2115 }
2116
2117 /* Try to fold PLT entries with GOT entries.  There are two cases when we
2118    want to do this:
2119
2120    - When all PLT references are GOTPLT references, and there are GOT
2121      references, and this is not the executable.  We don't have to
2122      generate a PLT at all.
2123
2124    - When there are both (ordinary) PLT references and GOT references,
2125      and this isn't the executable.
2126      We want to make the PLT reference use the ordinary GOT entry rather
2127      than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2128      since the GOT entry will have to be resolved at startup anyway.
2129
2130    Though the latter case is handled when room for the PLT is allocated,
2131    not here.
2132
2133    By folding into the GOT, we may need a round-trip to a PLT in the
2134    executable for calls, a loss in performance.  Still, losing a
2135    reloc is a win in size and at least in start-up time.
2136
2137    Note that this function is called before symbols are forced local by
2138    version scripts.  The differing cases are handled by
2139    elf_cris_hide_symbol.  */
2140
2141 static bfd_boolean
2142 elf_cris_try_fold_plt_to_got (h, p)
2143      struct elf_cris_link_hash_entry *h;
2144      PTR p;
2145 {
2146   struct bfd_link_info *info = (struct bfd_link_info *) p;
2147
2148   /* If there are no GOT references for this symbol, we can't fold any
2149      other reference so there's nothing to do.  Likewise if there are no
2150      PLT references; GOTPLT references included.  */
2151   if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2152     return TRUE;
2153
2154   /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2155   BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2156
2157   if (h->gotplt_refcount == h->root.plt.refcount)
2158     {
2159       /* The only PLT references are GOTPLT references, and there are GOT
2160          references.  Convert PLT to GOT references.  */
2161       if (! elf_cris_adjust_gotplt_to_got (h, info))
2162         return FALSE;
2163
2164       /* Clear the PLT references, so no PLT will be created.  */
2165       h->root.plt.offset = (bfd_vma) -1;
2166     }
2167
2168   return TRUE;
2169 }
2170
2171 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2172    to use a GOT entry (and create one) rather than requiring a GOTPLT
2173    entry.  */
2174
2175 static void
2176 elf_cris_hide_symbol (info, h, force_local)
2177      struct bfd_link_info *info;
2178      struct elf_link_hash_entry *h;
2179      bfd_boolean force_local;
2180 {
2181   elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2182
2183   _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2184 }
2185
2186 /* Adjust a symbol defined by a dynamic object and referenced by a
2187    regular object.  The current definition is in some section of the
2188    dynamic object, but we're not including those sections.  We have to
2189    change the definition to something the rest of the link can
2190    understand.  */
2191
2192 static bfd_boolean
2193 elf_cris_adjust_dynamic_symbol (info, h)
2194      struct bfd_link_info *info;
2195      struct elf_link_hash_entry *h;
2196 {
2197   bfd *dynobj;
2198   asection *s;
2199   unsigned int power_of_two;
2200   bfd_size_type plt_entry_size;
2201
2202   dynobj = elf_hash_table (info)->dynobj;
2203
2204   /* Make sure we know what is going on here.  */
2205   BFD_ASSERT (dynobj != NULL
2206               && (h->needs_plt
2207                   || h->u.weakdef != NULL
2208                   || (h->def_dynamic
2209                       && h->ref_regular
2210                       && !h->def_regular)));
2211
2212   plt_entry_size
2213     = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2214        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2215
2216   /* If this is a function, put it in the procedure linkage table.  We
2217      will fill in the contents of the procedure linkage table later,
2218      when we know the address of the .got section.  */
2219   if (h->type == STT_FUNC
2220       || h->needs_plt)
2221     {
2222       /* If we link a program (not a DSO), we'll get rid of unnecessary
2223          PLT entries; we point to the actual symbols -- even for pic
2224          relocs, because a program built with -fpic should have the same
2225          result as one built without -fpic, specifically considering weak
2226          symbols.
2227          FIXME: m68k and i386 differ here, for unclear reasons.  */
2228       if (! info->shared
2229           && !h->def_dynamic)
2230         {
2231           /* This case can occur if we saw a PLT reloc in an input file,
2232              but the symbol was not defined by a dynamic object.  In such
2233              a case, we don't actually need to build a procedure linkage
2234              table, and we can just do an absolute or PC reloc instead, or
2235              change a .got.plt index to a .got index for GOTPLT relocs.  */
2236           BFD_ASSERT (h->needs_plt);
2237           h->needs_plt = 0;
2238           h->plt.offset = (bfd_vma) -1;
2239           return
2240             elf_cris_adjust_gotplt_to_got ((struct
2241                                             elf_cris_link_hash_entry *) h,
2242                                            info);
2243         }
2244
2245       /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2246          where a pointer-equivalent symbol was unimportant (i.e. more
2247          like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2248          of the PLT.  We can't for the executable, because the GOT
2249          entries will point to the PLT there (and be constant).  */
2250       if (info->shared
2251           && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2252                                             h, info))
2253         return FALSE;
2254
2255       /* GC or folding may have rendered this entry unused.  */
2256       if (h->plt.refcount <= 0)
2257         {
2258           h->needs_plt = 0;
2259           h->plt.offset = (bfd_vma) -1;
2260           return TRUE;
2261         }
2262
2263       /* Make sure this symbol is output as a dynamic symbol.  */
2264       if (h->dynindx == -1)
2265         {
2266           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2267             return FALSE;
2268         }
2269
2270       s = bfd_get_section_by_name (dynobj, ".plt");
2271       BFD_ASSERT (s != NULL);
2272
2273       /* If this is the first .plt entry, make room for the special
2274          first entry.  */
2275       if (s->size == 0)
2276         s->size += plt_entry_size;
2277
2278       /* If this symbol is not defined in a regular file, and we are
2279          not generating a shared library, then set the symbol to this
2280          location in the .plt.  */
2281       if (!info->shared
2282           && !h->def_regular)
2283         {
2284           h->root.u.def.section = s;
2285           h->root.u.def.value = s->size;
2286         }
2287
2288       /* If there's already a GOT entry, use that, not a .got.plt.  A
2289          GOT field still has a reference count when we get here; it's
2290          not yet changed to an offset.  We can't do this for an
2291          executable, because then the reloc associated with the PLT
2292          would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2293          this to elf_cris_try_fold_plt_to_got.  */
2294       if (info->shared && h->got.refcount > 0)
2295         {
2296           h->got.refcount += h->plt.refcount;
2297
2298           /* Mark the PLT offset to use the GOT entry by setting the low
2299              bit in the plt offset; it is always a multiple of
2300              plt_entry_size (which is at least a multiple of 2).  */
2301           BFD_ASSERT ((s->size % plt_entry_size) == 0);
2302
2303           /* Change the PLT refcount to an offset.  */
2304           h->plt.offset = s->size;
2305
2306           /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2307              that the got entry should be used instead.  */
2308           BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2309                        h)->gotplt_offset == 0);
2310
2311           /* Make room for this entry.  */
2312           s->size += plt_entry_size;
2313
2314           return TRUE;
2315         }
2316
2317       /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2318       h->plt.offset = s->size;
2319
2320       /* Make room for this entry.  */
2321       s->size += plt_entry_size;
2322
2323       /* We also need to make an entry in the .got.plt section, which
2324          will be placed in the .got section by the linker script.  */
2325       ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2326         = elf_cris_hash_table (info)->next_gotplt_entry;
2327       elf_cris_hash_table (info)->next_gotplt_entry += 4;
2328
2329       s = bfd_get_section_by_name (dynobj, ".got.plt");
2330       BFD_ASSERT (s != NULL);
2331       s->size += 4;
2332
2333       /* We also need to make an entry in the .rela.plt section.  */
2334
2335       s = bfd_get_section_by_name (dynobj, ".rela.plt");
2336       BFD_ASSERT (s != NULL);
2337       s->size += sizeof (Elf32_External_Rela);
2338
2339       return TRUE;
2340     }
2341
2342   /* Reinitialize the plt offset now that it is not used as a reference
2343      count any more.  */
2344   h->plt.offset = (bfd_vma) -1;
2345
2346   /* If this is a weak symbol, and there is a real definition, the
2347      processor independent code will have arranged for us to see the
2348      real definition first, and we can just use the same value.  */
2349   if (h->u.weakdef != NULL)
2350     {
2351       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2352                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
2353       h->root.u.def.section = h->u.weakdef->root.u.def.section;
2354       h->root.u.def.value = h->u.weakdef->root.u.def.value;
2355       return TRUE;
2356     }
2357
2358   /* This is a reference to a symbol defined by a dynamic object which
2359      is not a function.  */
2360
2361   /* If we are creating a shared library, we must presume that the
2362      only references to the symbol are via the global offset table.
2363      For such cases we need not do anything here; the relocations will
2364      be handled correctly by relocate_section.  */
2365   if (info->shared)
2366     return TRUE;
2367
2368   /* If there are no references to this symbol that do not use the
2369      GOT, we don't need to generate a copy reloc.  */
2370   if (!h->non_got_ref)
2371     return TRUE;
2372
2373   if (h->size == 0)
2374     {
2375       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2376                              h->root.root.string);
2377       return TRUE;
2378     }
2379
2380   /* We must allocate the symbol in our .dynbss section, which will
2381      become part of the .bss section of the executable.  There will be
2382      an entry for this symbol in the .dynsym section.  The dynamic
2383      object will contain position independent code, so all references
2384      from the dynamic object to this symbol will go through the global
2385      offset table.  The dynamic linker will use the .dynsym entry to
2386      determine the address it must put in the global offset table, so
2387      both the dynamic object and the regular object will refer to the
2388      same memory location for the variable.  */
2389
2390   s = bfd_get_section_by_name (dynobj, ".dynbss");
2391   BFD_ASSERT (s != NULL);
2392
2393   /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2394      copy the initial value out of the dynamic object and into the
2395      runtime process image.  We need to remember the offset into the
2396      .rela.bss section we are going to use.  */
2397   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2398     {
2399       asection *srel;
2400
2401       srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2402       BFD_ASSERT (srel != NULL);
2403       srel->size += sizeof (Elf32_External_Rela);
2404       h->needs_copy = 1;
2405     }
2406
2407   /* Historic precedent: m68k and i386 allow max 8-byte alignment for the
2408      thing to copy; so do we.  */
2409
2410   /* We need to figure out the alignment required for this symbol.  I
2411      have no idea how ELF linkers handle this.  */
2412   power_of_two = bfd_log2 (h->size);
2413   if (power_of_two > 3)
2414     power_of_two = 3;
2415
2416   /* Apply the required alignment.  */
2417   s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2418   if (power_of_two > bfd_get_section_alignment (dynobj, s))
2419     {
2420       if (!bfd_set_section_alignment (dynobj, s, power_of_two))
2421         return FALSE;
2422     }
2423
2424   /* Define the symbol as being at this point in the section.  */
2425   h->root.u.def.section = s;
2426   h->root.u.def.value = s->size;
2427
2428   /* Increment the section size to make room for the symbol.  */
2429   s->size += h->size;
2430
2431   return TRUE;
2432 }
2433
2434 /* Look through the relocs for a section during the first phase.  */
2435
2436 static bfd_boolean
2437 cris_elf_check_relocs (abfd, info, sec, relocs)
2438      bfd *abfd;
2439      struct bfd_link_info *info;
2440      asection *sec;
2441      const Elf_Internal_Rela *relocs;
2442 {
2443   bfd *dynobj;
2444   Elf_Internal_Shdr *symtab_hdr;
2445   struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2446   bfd_signed_vma *local_got_refcounts;
2447   const Elf_Internal_Rela *rel;
2448   const Elf_Internal_Rela *rel_end;
2449   asection *sgot;
2450   asection *srelgot;
2451   asection *sreloc;
2452
2453   if (info->relocatable)
2454     return TRUE;
2455
2456   dynobj = elf_hash_table (info)->dynobj;
2457   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2458   sym_hashes = elf_sym_hashes (abfd);
2459   sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
2460   local_got_refcounts = elf_local_got_refcounts (abfd);
2461
2462   sgot = NULL;
2463   srelgot = NULL;
2464   sreloc = NULL;
2465
2466   if (!elf_bad_symtab (abfd))
2467     sym_hashes_end -= symtab_hdr->sh_info;
2468
2469   rel_end = relocs + sec->reloc_count;
2470   for (rel = relocs; rel < rel_end; rel++)
2471     {
2472       struct elf_link_hash_entry *h;
2473       unsigned long r_symndx;
2474       enum elf_cris_reloc_type r_type;
2475
2476       r_symndx = ELF32_R_SYM (rel->r_info);
2477       if (r_symndx < symtab_hdr->sh_info)
2478         h = NULL;
2479       else
2480         {
2481           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2482           while (h->root.type == bfd_link_hash_indirect
2483                  || h->root.type == bfd_link_hash_warning)
2484             h = (struct elf_link_hash_entry *) h->root.u.i.link;
2485         }
2486
2487       r_type = ELF32_R_TYPE (rel->r_info);
2488
2489       /* Some relocs require linker-created sections; we need to hang them
2490          on the first input bfd we found that contained dynamic relocs.  */
2491       switch (r_type)
2492         {
2493         case R_CRIS_16_GOT:
2494         case R_CRIS_32_GOT:
2495         case R_CRIS_32_GOTREL:
2496         case R_CRIS_32_PLT_GOTREL:
2497         case R_CRIS_32_PLT_PCREL:
2498         case R_CRIS_16_GOTPLT:
2499         case R_CRIS_32_GOTPLT:
2500           if (dynobj == NULL)
2501             {
2502               elf_hash_table (info)->dynobj = dynobj = abfd;
2503
2504               /* We could handle this if we can get a handle on the
2505                  output bfd in elf_cris_adjust_dynamic_symbol.  Failing
2506                  that, we must insist on dynobj being a specific mach.  */
2507               if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
2508                 {
2509                   (*_bfd_error_handler)
2510                     (_("%B, section %A:\n  v10/v32 compatible object %s"
2511                        " must not contain a PIC relocation"),
2512                      abfd, sec);
2513                   return FALSE;
2514                 }
2515
2516               /* Create the .got section, so we can assume it's always
2517                  present whenever there's a dynobj.  */
2518               if (!_bfd_elf_create_got_section (dynobj, info))
2519                 return FALSE;
2520             }
2521           break;
2522
2523         default:
2524           break;
2525         }
2526
2527       /* Some relocs require a global offset table (but perhaps not a
2528          specific GOT entry).  */
2529       switch (r_type)
2530         {
2531           /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2532              entry only for local symbols.  Unfortunately, we don't know
2533              until later on if there's a version script that forces the
2534              symbol local.  We must have the .rela.got section in place
2535              before we know if the symbol looks global now, so we need
2536              to treat the reloc just like for R_CRIS_16_GOT and
2537              R_CRIS_32_GOT.  */
2538         case R_CRIS_16_GOTPLT:
2539         case R_CRIS_32_GOTPLT:
2540         case R_CRIS_16_GOT:
2541         case R_CRIS_32_GOT:
2542           if (srelgot == NULL
2543               && (h != NULL || info->shared))
2544             {
2545               srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2546               if (srelgot == NULL)
2547                 {
2548                   srelgot = bfd_make_section_with_flags (dynobj,
2549                                                          ".rela.got",
2550                                                          (SEC_ALLOC
2551                                                           | SEC_LOAD
2552                                                           | SEC_HAS_CONTENTS
2553                                                           | SEC_IN_MEMORY
2554                                                           | SEC_LINKER_CREATED
2555                                                           | SEC_READONLY));
2556                   if (srelgot == NULL
2557                       || !bfd_set_section_alignment (dynobj, srelgot, 2))
2558                     return FALSE;
2559                 }
2560             }
2561           /* Fall through.  */
2562
2563         case R_CRIS_32_GOTREL:
2564         case R_CRIS_32_PLT_GOTREL:
2565           if (sgot == NULL)
2566             sgot = bfd_get_section_by_name (dynobj, ".got");
2567
2568           if (local_got_refcounts == NULL)
2569             {
2570               bfd_size_type amt;
2571
2572               /* We use index local_got_refcounts[-1] to count all
2573                  GOT-relative relocations that do not have explicit
2574                  GOT entries.  */
2575               amt = symtab_hdr->sh_info + 1;
2576               amt *= sizeof (bfd_signed_vma);
2577               local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
2578               if (local_got_refcounts == NULL)
2579                 return FALSE;
2580
2581               local_got_refcounts++;
2582               elf_local_got_refcounts (abfd) = local_got_refcounts;
2583             }
2584           break;
2585
2586         default:
2587           break;
2588         }
2589
2590       switch (r_type)
2591         {
2592         case R_CRIS_16_GOTPLT:
2593         case R_CRIS_32_GOTPLT:
2594           /* Mark that we need a GOT entry if the PLT entry (and its GOT
2595              entry) is eliminated.  We can only do this for a non-local
2596              symbol.  */
2597           if (h != NULL)
2598             {
2599               ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++;
2600               goto handle_gotplt_reloc;
2601             }
2602           /* If h is NULL then this is a local symbol, and we must make a
2603              GOT entry for it, so handle it like a GOT reloc.  */
2604           /* Fall through.  */
2605
2606         case R_CRIS_16_GOT:
2607         case R_CRIS_32_GOT:
2608           /* This symbol requires a global offset table entry.  */
2609           if (h != NULL)
2610             {
2611               if (h->got.refcount == 0)
2612                 {
2613                   /* Make sure this symbol is output as a dynamic symbol.  */
2614                   if (h->dynindx == -1)
2615                     {
2616                       if (!bfd_elf_link_record_dynamic_symbol (info, h))
2617                         return FALSE;
2618                     }
2619
2620                   /* Allocate space in the .got section.  */
2621                   sgot->size += 4;
2622                   /* Allocate relocation space.  */
2623                   srelgot->size += sizeof (Elf32_External_Rela);
2624                 }
2625               h->got.refcount++;
2626             }
2627           else
2628             {
2629               /* This is a global offset table entry for a local symbol.  */
2630               if (local_got_refcounts[r_symndx] == 0)
2631                 {
2632                   sgot->size += 4;
2633                   if (info->shared)
2634                     {
2635                       /* If we are generating a shared object, we need to
2636                          output a R_CRIS_RELATIVE reloc so that the dynamic
2637                          linker can adjust this GOT entry.  */
2638                       srelgot->size += sizeof (Elf32_External_Rela);
2639                     }
2640                 }
2641               local_got_refcounts[r_symndx]++;
2642             }
2643           break;
2644
2645         case R_CRIS_32_GOTREL:
2646           /* This reference requires a global offset table.
2647              FIXME: The actual refcount isn't used currently; the .got
2648              section can't be removed if there were any references in the
2649              input.  */
2650           local_got_refcounts[-1]++;
2651           break;
2652
2653         handle_gotplt_reloc:
2654
2655         case R_CRIS_32_PLT_GOTREL:
2656           /* This reference requires a global offset table.  */
2657           local_got_refcounts[-1]++;
2658           /* Fall through.  */
2659
2660         case R_CRIS_32_PLT_PCREL:
2661           /* This symbol requires a procedure linkage table entry.  We
2662              actually build the entry in adjust_dynamic_symbol,
2663              because this might be a case of linking PIC code which is
2664              never referenced by a dynamic object, in which case we
2665              don't need to generate a procedure linkage table entry
2666              after all.  */
2667
2668           /* Beware: if we'd check for visibility of the symbol here
2669              (and not marking the need for a PLT when non-visible), we'd
2670              get into trouble with keeping handling consistent with
2671              regards to relocs found before definition and GOTPLT
2672              handling.  Eliminable PLT entries will be dealt with later
2673              anyway.  */
2674           if (h == NULL)
2675             continue;
2676
2677           h->needs_plt = 1;
2678           h->plt.refcount++;
2679           break;
2680
2681         case R_CRIS_8:
2682         case R_CRIS_16:
2683         case R_CRIS_32:
2684           /* Let's help debug shared library creation.  Any of these
2685              relocs can be used in shared libs, but pages containing them
2686              cannot be shared.  Don't warn for sections we don't care
2687              about, such as debug sections or non-constant sections.  We
2688              can't help tables of (global) function pointers, for example,
2689              though they must be emitted in a data section to avoid having
2690              impure text sections.  */
2691           if (info->shared
2692               && (sec->flags & SEC_ALLOC) != 0
2693               && (sec->flags & SEC_READONLY) != 0)
2694             {
2695               /* FIXME: How do we make this optionally a warning only?  */
2696               (*_bfd_error_handler)
2697                 (_("%B, section %A:\n  relocation %s should not"
2698                    " be used in a shared object; recompile with -fPIC"),
2699                  abfd,
2700                  sec,
2701                  cris_elf_howto_table[r_type].name);
2702             }
2703           /* Fall through.  */
2704
2705         case R_CRIS_8_PCREL:
2706         case R_CRIS_16_PCREL:
2707         case R_CRIS_32_PCREL:
2708           if (h != NULL)
2709             {
2710               h->non_got_ref = 1;
2711
2712               /* Make sure a plt entry is created for this symbol if it
2713                  turns out to be a function defined by a dynamic object.  */
2714               if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2715                 h->plt.refcount++;
2716             }
2717
2718           /* If we are creating a shared library and this is not a local
2719              symbol, we need to copy the reloc into the shared library.
2720              However when linking with -Bsymbolic and this is a global
2721              symbol which is defined in an object we are including in the
2722              link (i.e., DEF_REGULAR is set), then we can resolve the
2723              reloc directly.  At this point we have not seen all the input
2724              files, so it is possible that DEF_REGULAR is not set now but
2725              will be set later (it is never cleared).  In case of a weak
2726              definition, DEF_REGULAR may be cleared later by a strong
2727              definition in a shared library.  We account for that
2728              possibility below by storing information in the relocs_copied
2729              field of the hash table entry.  A similar situation occurs
2730              when creating shared libraries and symbol visibility changes
2731              render the symbol local.  */
2732
2733           /* No need to do anything if we're not creating a shared object.  */
2734           if (! info->shared)
2735             break;
2736
2737           /* We don't need to handle relocs into sections not going into
2738              the "real" output.  */
2739           if ((sec->flags & SEC_ALLOC) == 0)
2740             break;
2741
2742           /* We can only eliminate PC-relative relocs.  */
2743           if (r_type == R_CRIS_8_PCREL
2744               || r_type == R_CRIS_16_PCREL
2745               || r_type == R_CRIS_32_PCREL)
2746             {
2747               /* If the symbol is local, then we can eliminate the reloc.  */
2748               if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2749                 break;
2750
2751               /* If this is with -Bsymbolic and the symbol isn't weak, and
2752                  is defined by an ordinary object (the ones we include in
2753                  this shared library) then we can also eliminate the
2754                  reloc.  See comment above for more eliminable cases which
2755                  we can't identify at this time.  */
2756               if (info->symbolic
2757                   && h->root.type != bfd_link_hash_defweak
2758                   && h->def_regular)
2759                 break;
2760
2761               if ((sec->flags & SEC_READONLY) != 0)
2762                 {
2763                   /* FIXME: How do we make this optionally a warning only?  */
2764                   (*_bfd_error_handler)
2765                     (_("%B, section %A:\n  relocation %s should not be used"
2766                        " in a shared object; recompile with -fPIC"),
2767                      abfd,
2768                      sec,
2769                      cris_elf_howto_table[r_type].name);
2770                 }
2771             }
2772
2773           /* We create a reloc section in dynobj and make room for this
2774              reloc.  */
2775           if (sreloc == NULL)
2776             {
2777               const char *name;
2778
2779               name = (bfd_elf_string_from_elf_section
2780                       (abfd,
2781                        elf_elfheader (abfd)->e_shstrndx,
2782                        elf_section_data (sec)->rel_hdr.sh_name));
2783               if (name == NULL)
2784                 return FALSE;
2785
2786               BFD_ASSERT (CONST_STRNEQ (name, ".rela")
2787                           && strcmp (bfd_get_section_name (abfd, sec),
2788                                      name + 5) == 0);
2789
2790               sreloc = bfd_get_section_by_name (dynobj, name);
2791               if (sreloc == NULL)
2792                 {
2793                   sreloc = bfd_make_section_with_flags (dynobj, name,
2794                                                         (SEC_ALLOC
2795                                                          | SEC_LOAD
2796                                                          | SEC_HAS_CONTENTS
2797                                                          | SEC_IN_MEMORY
2798                                                          | SEC_LINKER_CREATED
2799                                                          | SEC_READONLY));
2800                   if (sreloc == NULL
2801                       || !bfd_set_section_alignment (dynobj, sreloc, 2))
2802                     return FALSE;
2803                 }
2804               if (sec->flags & SEC_READONLY)
2805                 info->flags |= DF_TEXTREL;
2806             }
2807
2808           sreloc->size += sizeof (Elf32_External_Rela);
2809
2810           /* If we are linking with -Bsymbolic, we count the number of PC
2811              relative relocations we have entered for this symbol, so that
2812              we can discard them again if the symbol is later defined by a
2813              regular object.  We know that h is really a pointer to an
2814              elf_cris_link_hash_entry.  */
2815           if ((r_type == R_CRIS_8_PCREL
2816                || r_type == R_CRIS_16_PCREL
2817                || r_type == R_CRIS_32_PCREL)
2818               && info->symbolic)
2819             {
2820               struct elf_cris_link_hash_entry *eh;
2821               struct elf_cris_pcrel_relocs_copied *p;
2822
2823               eh = (struct elf_cris_link_hash_entry *) h;
2824
2825               for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2826                 if (p->section == sreloc)
2827                   break;
2828
2829               if (p == NULL)
2830                 {
2831                   p = ((struct elf_cris_pcrel_relocs_copied *)
2832                        bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2833                   if (p == NULL)
2834                     return FALSE;
2835                   p->next = eh->pcrel_relocs_copied;
2836                   eh->pcrel_relocs_copied = p;
2837                   p->section = sreloc;
2838                   p->count = 0;
2839                 }
2840
2841               ++p->count;
2842             }
2843           break;
2844
2845         /* This relocation describes the C++ object vtable hierarchy.
2846            Reconstruct it for later use during GC.  */
2847         case R_CRIS_GNU_VTINHERIT:
2848           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2849             return FALSE;
2850           break;
2851
2852         /* This relocation describes which C++ vtable entries are actually
2853            used.  Record for later use during GC.  */
2854         case R_CRIS_GNU_VTENTRY:
2855           if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2856             return FALSE;
2857           break;
2858
2859         default:
2860           /* Other relocs do not appear here.  */
2861           bfd_set_error (bfd_error_bad_value);
2862           return FALSE;
2863         }
2864     }
2865
2866   return TRUE;
2867 }
2868
2869 /* Set the sizes of the dynamic sections.  */
2870
2871 static bfd_boolean
2872 elf_cris_size_dynamic_sections (output_bfd, info)
2873      bfd *output_bfd ATTRIBUTE_UNUSED;
2874      struct bfd_link_info *info;
2875 {
2876   bfd *dynobj;
2877   asection *s;
2878   bfd_boolean plt;
2879   bfd_boolean relocs;
2880
2881   dynobj = elf_hash_table (info)->dynobj;
2882   BFD_ASSERT (dynobj != NULL);
2883
2884   if (elf_hash_table (info)->dynamic_sections_created)
2885     {
2886       /* Set the contents of the .interp section to the interpreter.  */
2887       if (info->executable)
2888         {
2889           s = bfd_get_section_by_name (dynobj, ".interp");
2890           BFD_ASSERT (s != NULL);
2891           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2892           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2893         }
2894     }
2895   else
2896     {
2897       /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
2898       elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2899                                    elf_cris_adjust_gotplt_to_got,
2900                                    (PTR) info);
2901
2902       /* We may have created entries in the .rela.got section.
2903          However, if we are not creating the dynamic sections, we will
2904          not actually use these entries.  Reset the size of .rela.got,
2905          which will cause it to get stripped from the output file
2906          below.  */
2907       s = bfd_get_section_by_name (dynobj, ".rela.got");
2908       if (s != NULL)
2909         s->size = 0;
2910     }
2911
2912   /* If this is a -Bsymbolic shared link, then we need to discard all PC
2913      relative relocs against symbols defined in a regular object.  We
2914      allocated space for them in the check_relocs routine, but we will not
2915      fill them in in the relocate_section routine.  We also discard space
2916      for relocs that have become for local symbols due to symbol
2917      visibility changes.  For programs, we discard space for relocs for
2918      symbols not referenced by any dynamic object.  */
2919   if (info->shared)
2920     elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2921                                  elf_cris_discard_excess_dso_dynamics,
2922                                  (PTR) info);
2923   else
2924     elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2925                                  elf_cris_discard_excess_program_dynamics,
2926                                  (PTR) info);
2927
2928   /* The check_relocs and adjust_dynamic_symbol entry points have
2929      determined the sizes of the various dynamic sections.  Allocate
2930      memory for them.  */
2931   plt = FALSE;
2932   relocs = FALSE;
2933   for (s = dynobj->sections; s != NULL; s = s->next)
2934     {
2935       const char *name;
2936
2937       if ((s->flags & SEC_LINKER_CREATED) == 0)
2938         continue;
2939
2940       /* It's OK to base decisions on the section name, because none
2941          of the dynobj section names depend upon the input files.  */
2942       name = bfd_get_section_name (dynobj, s);
2943
2944       if (strcmp (name, ".plt") == 0)
2945         {
2946           /* Remember whether there is a PLT.  */
2947           plt = s->size != 0;
2948         }
2949       else if (CONST_STRNEQ (name, ".rela"))
2950         {
2951           if (s->size != 0)
2952             {
2953               /* Remember whether there are any reloc sections other
2954                  than .rela.plt.  */
2955               if (strcmp (name, ".rela.plt") != 0)
2956                   relocs = TRUE;
2957
2958               /* We use the reloc_count field as a counter if we need
2959                  to copy relocs into the output file.  */
2960               s->reloc_count = 0;
2961             }
2962         }
2963       else if (! CONST_STRNEQ (name, ".got")
2964                && strcmp (name, ".dynbss") != 0)
2965         {
2966           /* It's not one of our sections, so don't allocate space.  */
2967           continue;
2968         }
2969
2970       if (s->size == 0)
2971         {
2972           /* If we don't need this section, strip it from the
2973              output file.  This is mostly to handle .rela.bss and
2974              .rela.plt.  We must create both sections in
2975              create_dynamic_sections, because they must be created
2976              before the linker maps input sections to output
2977              sections.  The linker does that before
2978              adjust_dynamic_symbol is called, and it is that
2979              function which decides whether anything needs to go
2980              into these sections.  */
2981           s->flags |= SEC_EXCLUDE;
2982           continue;
2983         }
2984
2985       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2986         continue;
2987
2988       /* Allocate memory for the section contents. We use bfd_zalloc here
2989          in case unused entries are not reclaimed before the section's
2990          contents are written out.  This should not happen, but this way
2991          if it does, we will not write out garbage.  For reloc sections,
2992          this will make entries have the type R_CRIS_NONE.  */
2993       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2994       if (s->contents == NULL)
2995         return FALSE;
2996     }
2997
2998   if (elf_hash_table (info)->dynamic_sections_created)
2999     {
3000       /* Add some entries to the .dynamic section.  We fill in the
3001          values later, in elf_cris_finish_dynamic_sections, but we
3002          must add the entries now so that we get the correct size for
3003          the .dynamic section.  The DT_DEBUG entry is filled in by the
3004          dynamic linker and used by the debugger.  */
3005 #define add_dynamic_entry(TAG, VAL) \
3006   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3007
3008       if (!info->shared)
3009         {
3010           if (!add_dynamic_entry (DT_DEBUG, 0))
3011             return FALSE;
3012         }
3013
3014       if (plt)
3015         {
3016           if (!add_dynamic_entry (DT_PLTGOT, 0)
3017               || !add_dynamic_entry (DT_PLTRELSZ, 0)
3018               || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3019               || !add_dynamic_entry (DT_JMPREL, 0))
3020             return FALSE;
3021         }
3022
3023       if (relocs)
3024         {
3025           if (!add_dynamic_entry (DT_RELA, 0)
3026               || !add_dynamic_entry (DT_RELASZ, 0)
3027               || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3028             return FALSE;
3029         }
3030
3031       if ((info->flags & DF_TEXTREL) != 0)
3032         {
3033           if (!add_dynamic_entry (DT_TEXTREL, 0))
3034             return FALSE;
3035           info->flags |= DF_TEXTREL;
3036         }
3037     }
3038 #undef add_dynamic_entry
3039
3040   return TRUE;
3041 }
3042
3043 /* This function is called via elf_cris_link_hash_traverse if we are
3044    creating a shared object.  In the -Bsymbolic case, it discards the
3045    space allocated to copy PC relative relocs against symbols which
3046    are defined in regular objects.  For the normal non-symbolic case,
3047    we also discard space for relocs that have become local due to
3048    symbol visibility changes.  We allocated space for them in the
3049    check_relocs routine, but we won't fill them in in the
3050    relocate_section routine.  */
3051
3052 static bfd_boolean
3053 elf_cris_discard_excess_dso_dynamics (h, inf)
3054      struct elf_cris_link_hash_entry *h;
3055      PTR inf;
3056 {
3057   struct elf_cris_pcrel_relocs_copied *s;
3058   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3059
3060   if (h->root.root.type == bfd_link_hash_warning)
3061     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3062
3063   /* If a symbol has been forced local or we have found a regular
3064      definition for the symbolic link case, then we won't be needing
3065      any relocs.  */
3066   if (h->root.def_regular
3067       && (h->root.forced_local
3068           || info->symbolic))
3069     {
3070       for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3071         s->section->size -= s->count * sizeof (Elf32_External_Rela);
3072     }
3073
3074   return TRUE;
3075 }
3076
3077 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3078    creating a shared object.  We discard space for relocs for symbols put
3079    in the .got, but which we found we do not have to resolve at run-time.  */
3080
3081 static bfd_boolean
3082 elf_cris_discard_excess_program_dynamics (h, inf)
3083      struct elf_cris_link_hash_entry *h;
3084      PTR inf;
3085 {
3086   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3087
3088   if (h->root.root.type == bfd_link_hash_warning)
3089     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3090
3091   /* If we're not creating a shared library and have a symbol which is
3092      referred to by .got references, but the symbol is defined locally,
3093      (or rather, not defined by a DSO) then lose the reloc for the .got
3094      (don't allocate room for it).  Likewise for relocs for something
3095      for which we create a PLT.  */
3096   if (!h->root.def_dynamic
3097       || h->root.plt.refcount > 0)
3098     {
3099       if (h->root.got.refcount > 0
3100           /* The size of this section is only valid and in sync with the
3101              various reference counts if we do dynamic; don't decrement it
3102              otherwise.  */
3103           && elf_hash_table (info)->dynamic_sections_created)
3104         {
3105           bfd *dynobj = elf_hash_table (info)->dynobj;
3106           asection *srelgot;
3107
3108           BFD_ASSERT (dynobj != NULL);
3109
3110           srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3111
3112           BFD_ASSERT (srelgot != NULL);
3113
3114           srelgot->size -= sizeof (Elf32_External_Rela);
3115         }
3116
3117       /* If the locally-defined symbol isn't used by a DSO, then we don't
3118          have to export it as a dynamic symbol.  This was already done for
3119          functions; doing this for all symbols would presumably not
3120          introduce new problems.  Of course we don't do this if we're
3121          exporting all dynamic symbols.  */
3122       if (! info->export_dynamic
3123           && h->root.dynindx != -1
3124           && !h->root.def_dynamic
3125           && !h->root.ref_dynamic)
3126         {
3127           h->root.dynindx = -1;
3128           _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3129                                   h->root.dynstr_index);
3130         }
3131     }
3132
3133   return TRUE;
3134 }
3135
3136 /* Reject a file depending on presence and expectation of prefixed
3137    underscores on symbols.  */
3138
3139 static bfd_boolean
3140 cris_elf_object_p (abfd)
3141      bfd *abfd;
3142 {
3143   if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3144     return FALSE;
3145
3146   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3147     return (bfd_get_symbol_leading_char (abfd) == '_');
3148   else
3149     return (bfd_get_symbol_leading_char (abfd) == 0);
3150 }
3151
3152 /* Mark presence or absence of leading underscore.  Set machine type
3153    flags from mach type.  */
3154
3155 static void
3156 cris_elf_final_write_processing (abfd, linker)
3157      bfd *abfd;
3158      bfd_boolean linker ATTRIBUTE_UNUSED;
3159 {
3160   unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3161
3162   e_flags &= ~EF_CRIS_UNDERSCORE;
3163   if (bfd_get_symbol_leading_char (abfd) == '_')
3164     e_flags |= EF_CRIS_UNDERSCORE;
3165
3166   switch (bfd_get_mach (abfd))
3167     {
3168     case bfd_mach_cris_v0_v10:
3169       e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3170       break;
3171
3172     case bfd_mach_cris_v10_v32:
3173       e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3174       break;
3175
3176     case bfd_mach_cris_v32:
3177       e_flags |= EF_CRIS_VARIANT_V32;
3178       break;
3179
3180     default:
3181       _bfd_abort (__FILE__, __LINE__,
3182                   _("Unexpected machine number"));
3183     }
3184
3185   elf_elfheader (abfd)->e_flags = e_flags;
3186 }
3187
3188 /* Set the mach type from e_flags value.  */
3189
3190 static bfd_boolean
3191 cris_elf_set_mach_from_flags (abfd, flags)
3192      bfd *abfd;
3193      unsigned long flags;
3194 {
3195   switch (flags & EF_CRIS_VARIANT_MASK)
3196     {
3197     case EF_CRIS_VARIANT_ANY_V0_V10:
3198       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3199       break;
3200
3201     case EF_CRIS_VARIANT_V32:
3202       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3203       break;
3204
3205     case EF_CRIS_VARIANT_COMMON_V10_V32:
3206       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3207       break;
3208
3209     default:
3210       /* Since we don't recognize them, we obviously can't support them
3211          with this code; we'd have to require that all future handling
3212          would be optional.  */
3213       bfd_set_error (bfd_error_wrong_format);
3214       return FALSE;
3215     }
3216
3217   return TRUE;
3218 }
3219
3220 /* Display the flags field.  */
3221
3222 static bfd_boolean
3223 cris_elf_print_private_bfd_data (abfd, ptr)
3224      bfd *abfd;
3225      PTR ptr;
3226 {
3227   FILE *file = (FILE *) ptr;
3228
3229   BFD_ASSERT (abfd != NULL && ptr != NULL);
3230
3231   _bfd_elf_print_private_bfd_data (abfd, ptr);
3232
3233   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3234
3235   if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3236     fprintf (file, _(" [symbols have a _ prefix]"));
3237   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3238       == EF_CRIS_VARIANT_COMMON_V10_V32)
3239     fprintf (file, _(" [v10 and v32]"));
3240   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3241       == EF_CRIS_VARIANT_V32)
3242     fprintf (file, _(" [v32]"));
3243
3244   fputc ('\n', file);
3245   return TRUE;
3246 }
3247
3248 /* Don't mix files with and without a leading underscore.  */
3249
3250 static bfd_boolean
3251 cris_elf_merge_private_bfd_data (ibfd, obfd)
3252      bfd *ibfd;
3253      bfd *obfd;
3254 {
3255   int imach, omach;
3256
3257   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3258     return FALSE;
3259
3260   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3261       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3262     return TRUE;
3263
3264   imach = bfd_get_mach (ibfd);
3265
3266   if (! elf_flags_init (obfd))
3267     {
3268       /* This happens when ld starts out with a 'blank' output file.  */
3269       elf_flags_init (obfd) = TRUE;
3270
3271       /* We ignore the linker-set mach, and instead set it according to
3272          the first input file.  This would also happen if we could
3273          somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3274          This allows us to keep the same linker config across
3275          cris(v0..v10) and crisv32.  The drawback is that we can't force
3276          the output type, which might be a sane thing to do for a
3277          v10+v32 compatibility object.  */
3278       if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3279         return FALSE;
3280     }
3281
3282   if (bfd_get_symbol_leading_char (ibfd)
3283       != bfd_get_symbol_leading_char (obfd))
3284     {
3285       (*_bfd_error_handler)
3286         (bfd_get_symbol_leading_char (ibfd) == '_'
3287          ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3288          : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3289          ibfd);
3290       bfd_set_error (bfd_error_bad_value);
3291       return FALSE;
3292     }
3293
3294   omach = bfd_get_mach (obfd);
3295
3296   if (imach != omach)
3297     {
3298       /* We can get an incompatible combination only if either is
3299          bfd_mach_cris_v32, and the other one isn't compatible.  */
3300       if ((imach == bfd_mach_cris_v32
3301            && omach != bfd_mach_cris_v10_v32)
3302           || (omach == bfd_mach_cris_v32
3303               && imach != bfd_mach_cris_v10_v32))
3304         {
3305           (*_bfd_error_handler)
3306             ((imach == bfd_mach_cris_v32)
3307              ? _("%B contains CRIS v32 code, incompatible"
3308                  " with previous objects")
3309              : _("%B contains non-CRIS-v32 code, incompatible"
3310                  " with previous objects"),
3311              ibfd);
3312           bfd_set_error (bfd_error_bad_value);
3313           return FALSE;
3314         }
3315
3316       /* We don't have to check the case where the input is compatible
3317          with v10 and v32, because the output is already known to be set
3318          to the other (compatible) mach.  */
3319       if (omach == bfd_mach_cris_v10_v32
3320           && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3321         return FALSE;
3322     }
3323
3324   return TRUE;
3325 }
3326
3327 /* Do side-effects of e_flags copying to obfd.  */
3328
3329 static bfd_boolean
3330 cris_elf_copy_private_bfd_data (ibfd, obfd)
3331      bfd *ibfd;
3332      bfd *obfd;
3333 {
3334   /* Call the base function.  */
3335   if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3336     return FALSE;
3337
3338   /* If output is big-endian for some obscure reason, stop here.  */
3339   if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
3340     return FALSE;
3341
3342   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3343       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3344     return TRUE;
3345
3346   /* Do what we really came here for.  */
3347   return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3348 }
3349
3350 static enum elf_reloc_type_class
3351 elf_cris_reloc_type_class (rela)
3352      const Elf_Internal_Rela *rela;
3353 {
3354   switch ((int) ELF32_R_TYPE (rela->r_info))
3355     {
3356     case R_CRIS_RELATIVE:
3357       return reloc_class_relative;
3358     case R_CRIS_JUMP_SLOT:
3359       return reloc_class_plt;
3360     case R_CRIS_COPY:
3361       return reloc_class_copy;
3362     default:
3363       return reloc_class_normal;
3364     }
3365 }
3366 \f
3367 #define ELF_ARCH                bfd_arch_cris
3368 #define ELF_MACHINE_CODE        EM_CRIS
3369 #define ELF_MAXPAGESIZE         0x2000
3370
3371 #define TARGET_LITTLE_SYM       bfd_elf32_cris_vec
3372 #define TARGET_LITTLE_NAME      "elf32-cris"
3373 #define elf_symbol_leading_char 0
3374
3375 #define elf_info_to_howto_rel                   NULL
3376 #define elf_info_to_howto                       cris_info_to_howto_rela
3377 #define elf_backend_relocate_section            cris_elf_relocate_section
3378 #define elf_backend_gc_mark_hook                cris_elf_gc_mark_hook
3379 #define elf_backend_gc_sweep_hook               cris_elf_gc_sweep_hook
3380 #define elf_backend_check_relocs                cris_elf_check_relocs
3381 #define elf_backend_grok_prstatus               cris_elf_grok_prstatus
3382 #define elf_backend_grok_psinfo                 cris_elf_grok_psinfo
3383
3384 #define elf_backend_can_gc_sections             1
3385 #define elf_backend_can_refcount                1
3386
3387 #define elf_backend_object_p                    cris_elf_object_p
3388 #define elf_backend_final_write_processing \
3389         cris_elf_final_write_processing
3390 #define bfd_elf32_bfd_print_private_bfd_data \
3391         cris_elf_print_private_bfd_data
3392 #define bfd_elf32_bfd_merge_private_bfd_data \
3393         cris_elf_merge_private_bfd_data
3394 #define bfd_elf32_bfd_copy_private_bfd_data \
3395         cris_elf_copy_private_bfd_data
3396
3397 #define bfd_elf32_bfd_reloc_type_lookup         cris_reloc_type_lookup
3398
3399 #define bfd_elf32_bfd_link_hash_table_create \
3400         elf_cris_link_hash_table_create
3401 #define elf_backend_adjust_dynamic_symbol \
3402         elf_cris_adjust_dynamic_symbol
3403 #define elf_backend_size_dynamic_sections \
3404         elf_cris_size_dynamic_sections
3405 #define elf_backend_init_index_section          _bfd_elf_init_1_index_section
3406 #define elf_backend_finish_dynamic_symbol \
3407         elf_cris_finish_dynamic_symbol
3408 #define elf_backend_finish_dynamic_sections \
3409         elf_cris_finish_dynamic_sections
3410 #define elf_backend_create_dynamic_sections \
3411         _bfd_elf_create_dynamic_sections
3412 #define bfd_elf32_bfd_final_link \
3413         bfd_elf_gc_common_final_link
3414 #define elf_backend_hide_symbol                 elf_cris_hide_symbol
3415 #define elf_backend_reloc_type_class            elf_cris_reloc_type_class
3416
3417 #define elf_backend_want_got_plt        1
3418 #define elf_backend_plt_readonly        1
3419 #define elf_backend_want_plt_sym        0
3420 #define elf_backend_got_header_size     12
3421
3422 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3423    linking and libraries (if it's a win of any significance).  Until then,
3424    take the easy route.  */
3425 #define elf_backend_may_use_rel_p 0
3426 #define elf_backend_may_use_rela_p 1
3427 #define elf_backend_rela_normal         1
3428
3429 #include "elf32-target.h"
3430
3431 #undef TARGET_LITTLE_SYM
3432 #undef TARGET_LITTLE_NAME
3433 #undef elf_symbol_leading_char
3434
3435 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3436 #define TARGET_LITTLE_NAME "elf32-us-cris"
3437 #define elf_symbol_leading_char '_'
3438 #undef elf32_bed
3439 #define elf32_bed elf32_us_cris_bed
3440
3441 #include "elf32-target.h"