bfd/elf32-cris.c

   1 /* CRIS-specific support for 32-bit ELF.
   2    Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   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 3 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,
  23    MA 02110-1301, USA.  */
  24
  25 #include "sysdep.h"
  26 #include "bfd.h"
  27 #include "libbfd.h"
  28 #include "elf-bfd.h"
  29 #include "elf/cris.h"
  30
  31 /* Forward declarations.  */
  32 static reloc_howto_type * cris_reloc_type_lookup
  33   PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
  34
  35 static void cris_info_to_howto_rela
  36   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
  37
  38 static bfd_reloc_status_type cris_elf_pcrel_reloc
  39   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  40
  41 static bfd_boolean cris_elf_grok_prstatus
  42   PARAMS ((bfd *abfd, Elf_Internal_Note *note));
  43
  44 static bfd_boolean cris_elf_grok_psinfo
  45   PARAMS ((bfd *abfd, Elf_Internal_Note *note));
  46
  47 static bfd_boolean cris_elf_relocate_section
  48   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
  49            Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
  50
  51 static bfd_reloc_status_type cris_final_link_relocate
  52   PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
  53            Elf_Internal_Rela *, bfd_vma));
  54
  55 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
  56
  57 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
  58
  59 static bfd_boolean cris_elf_set_mach_from_flags
  60   PARAMS ((bfd *, unsigned long int));
  61
  62 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
  63
  64 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
  65 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
  66
  67 struct elf_cris_link_hash_entry;
  68 static bfd_boolean elf_cris_discard_excess_dso_dynamics
  69   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
  70 static bfd_boolean elf_cris_discard_excess_program_dynamics
  71   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
  72 static bfd_boolean elf_cris_adjust_gotplt_to_got
  73   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
  74 static bfd_boolean elf_cris_try_fold_plt_to_got
  75   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
  76 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
  77   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
  78 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
  79   PARAMS ((bfd *));
  80 static bfd_boolean elf_cris_adjust_dynamic_symbol
  81   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
  82 static bfd_boolean cris_elf_check_relocs
  83   PARAMS ((bfd *, struct bfd_link_info *, asection *,
  84            const Elf_Internal_Rela *));
  85
  86 static bfd_boolean elf_cris_size_dynamic_sections
  87   PARAMS ((bfd *, struct bfd_link_info *));
  88 static bfd_boolean elf_cris_finish_dynamic_symbol
  89   PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
  90            Elf_Internal_Sym *));
  91 static bfd_boolean elf_cris_finish_dynamic_sections
  92   PARAMS ((bfd *, struct bfd_link_info *));
  93 static void elf_cris_hide_symbol
  94   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
  95 static enum elf_reloc_type_class elf_cris_reloc_type_class
  96   PARAMS ((const Elf_Internal_Rela *));
  97
  98 static reloc_howto_type cris_elf_howto_table [] =
  99 {
 100   /* This reloc does nothing.  */
 101   HOWTO (R_CRIS_NONE,           /* type */
 102          0,                     /* rightshift */
 103          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 104          32,                    /* bitsize */
 105          FALSE,                 /* pc_relative */
 106          0,                     /* bitpos */
 107          complain_overflow_bitfield, /* complain_on_overflow */
 108          bfd_elf_generic_reloc, /* special_function */
 109          "R_CRIS_NONE",         /* name */
 110          FALSE,                 /* partial_inplace */
 111          0,                     /* src_mask */
 112          0,                     /* dst_mask */
 113          FALSE),                /* pcrel_offset */
 114
 115   /* An 8 bit absolute relocation.  */
 116   HOWTO (R_CRIS_8,              /* type */
 117          0,                     /* rightshift */
 118          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 119          8,                     /* bitsize */
 120          FALSE,                 /* pc_relative */
 121          0,                     /* bitpos */
 122          complain_overflow_bitfield, /* complain_on_overflow */
 123          bfd_elf_generic_reloc, /* special_function */
 124          "R_CRIS_8",            /* name */
 125          FALSE,                 /* partial_inplace */
 126          0x0000,                /* src_mask */
 127          0x00ff,                /* dst_mask */
 128          FALSE),                /* pcrel_offset */
 129
 130   /* A 16 bit absolute relocation.  */
 131   HOWTO (R_CRIS_16,             /* type */
 132          0,                     /* rightshift */
 133          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 134          16,                    /* bitsize */
 135          FALSE,                 /* pc_relative */
 136          0,                     /* bitpos */
 137          complain_overflow_bitfield, /* complain_on_overflow */
 138          bfd_elf_generic_reloc, /* special_function */
 139          "R_CRIS_16",           /* name */
 140          FALSE,                 /* partial_inplace */
 141          0x00000000,            /* src_mask */
 142          0x0000ffff,            /* dst_mask */
 143          FALSE),                /* pcrel_offset */
 144
 145   /* A 32 bit absolute relocation.  */
 146   HOWTO (R_CRIS_32,             /* type */
 147          0,                     /* rightshift */
 148          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 149          32,                    /* bitsize */
 150          FALSE,                 /* pc_relative */
 151          0,                     /* bitpos */
 152          /* We don't want overflow complaints for 64-bit vma builds
 153             for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
 154             32-bit ELF) where sym=0xc0001234.
 155             Don't do this for the PIC relocs, as we don't expect to
 156             see them with large offsets.  */
 157          complain_overflow_dont, /* complain_on_overflow */
 158          bfd_elf_generic_reloc, /* special_function */
 159          "R_CRIS_32",           /* name */
 160          FALSE,                 /* partial_inplace */
 161          0x00000000,            /* src_mask */
 162          0xffffffff,            /* dst_mask */
 163          FALSE),                /* pcrel_offset */
 164
 165   /* An 8 bit PC-relative relocation.  */
 166   HOWTO (R_CRIS_8_PCREL,        /* type */
 167          0,                     /* rightshift */
 168          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 169          8,                     /* bitsize */
 170          TRUE,                  /* pc_relative */
 171          0,                     /* bitpos */
 172          complain_overflow_bitfield, /* complain_on_overflow */
 173          cris_elf_pcrel_reloc,  /* special_function */
 174          "R_CRIS_8_PCREL",      /* name */
 175          FALSE,                 /* partial_inplace */
 176          0x0000,                /* src_mask */
 177          0x00ff,                /* dst_mask */
 178          TRUE),                 /* pcrel_offset */
 179
 180   /* A 16 bit PC-relative relocation.  */
 181   HOWTO (R_CRIS_16_PCREL,       /* type */
 182          0,                     /* rightshift */
 183          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 184          16,                    /* bitsize */
 185          TRUE,                  /* pc_relative */
 186          0,                     /* bitpos */
 187          complain_overflow_bitfield, /* complain_on_overflow */
 188          cris_elf_pcrel_reloc,  /* special_function */
 189          "R_CRIS_16_PCREL",     /* name */
 190          FALSE,                 /* partial_inplace */
 191          0x00000000,            /* src_mask */
 192          0x0000ffff,            /* dst_mask */
 193          TRUE),                 /* pcrel_offset */
 194
 195   /* A 32 bit PC-relative relocation.  */
 196   HOWTO (R_CRIS_32_PCREL,       /* type */
 197          0,                     /* rightshift */
 198          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 199          32,                    /* bitsize */
 200          TRUE,                  /* pc_relative */
 201          0,                     /* bitpos */
 202          complain_overflow_bitfield, /* complain_on_overflow */
 203          cris_elf_pcrel_reloc,  /* special_function */
 204          "R_CRIS_32_PCREL",     /* name */
 205          FALSE,                 /* partial_inplace */
 206          0x00000000,            /* src_mask */
 207          0xffffffff,            /* dst_mask */
 208          TRUE),                 /* pcrel_offset */
 209
 210   /* GNU extension to record C++ vtable hierarchy.  */
 211   HOWTO (R_CRIS_GNU_VTINHERIT,  /* type */
 212          0,                     /* rightshift */
 213          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 214          0,                     /* bitsize */
 215          FALSE,                 /* pc_relative */
 216          0,                     /* bitpos */
 217          complain_overflow_dont, /* complain_on_overflow */
 218          NULL,                  /* special_function */
 219          "R_CRIS_GNU_VTINHERIT", /* name */
 220          FALSE,                 /* partial_inplace */
 221          0,                     /* src_mask */
 222          0,                     /* dst_mask */
 223          FALSE),                /* pcrel_offset */
 224
 225   /* GNU extension to record C++ vtable member usage.  */
 226   HOWTO (R_CRIS_GNU_VTENTRY,    /* type */
 227          0,                     /* rightshift */
 228          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 229          0,                     /* bitsize */
 230          FALSE,                 /* pc_relative */
 231          0,                     /* bitpos */
 232          complain_overflow_dont, /* complain_on_overflow */
 233          _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
 234          "R_CRIS_GNU_VTENTRY",   /* name */
 235          FALSE,                 /* partial_inplace */
 236          0,                     /* src_mask */
 237          0,                     /* dst_mask */
 238          FALSE),                /* pcrel_offset */
 239
 240   /* This is used only by the dynamic linker.  The symbol should exist
 241      both in the object being run and in some shared library.  The
 242      dynamic linker copies the data addressed by the symbol from the
 243      shared library into the object, because the object being
 244      run has to have the data at some particular address.  */
 245   HOWTO (R_CRIS_COPY,           /* type */
 246          0,                     /* rightshift */
 247          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 248          32,                    /* bitsize */
 249          FALSE,                 /* pc_relative */
 250          0,                     /* bitpos */
 251          complain_overflow_bitfield, /* complain_on_overflow */
 252          bfd_elf_generic_reloc, /* special_function */
 253          "R_CRIS_COPY",         /* name */
 254          FALSE,                 /* partial_inplace */
 255          0,                     /* src_mask */
 256          0,                     /* dst_mask */
 257          FALSE),                /* pcrel_offset */
 258
 259   /* Like R_CRIS_32, but used when setting global offset table entries.  */
 260   HOWTO (R_CRIS_GLOB_DAT,       /* type */
 261          0,                     /* rightshift */
 262          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 263          32,                    /* bitsize */
 264          FALSE,                 /* pc_relative */
 265          0,                     /* bitpos */
 266          complain_overflow_bitfield, /* complain_on_overflow */
 267          bfd_elf_generic_reloc, /* special_function */
 268          "R_CRIS_GLOB_DAT",     /* name */
 269          FALSE,                 /* partial_inplace */
 270          0,                     /* src_mask */
 271          0xffffffff,            /* dst_mask */
 272          FALSE),                /* pcrel_offset */
 273
 274   /* Marks a procedure linkage table entry for a symbol.  */
 275   HOWTO (R_CRIS_JUMP_SLOT,      /* type */
 276          0,                     /* rightshift */
 277          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 278          32,                    /* bitsize */
 279          FALSE,                 /* pc_relative */
 280          0,                     /* bitpos */
 281          complain_overflow_bitfield, /* complain_on_overflow */
 282          bfd_elf_generic_reloc, /* special_function */
 283          "R_CRIS_JUMP_SLOT",    /* name */
 284          FALSE,                 /* partial_inplace */
 285          0,                     /* src_mask */
 286          0,                     /* dst_mask */
 287          FALSE),                /* pcrel_offset */
 288
 289   /* Used only by the dynamic linker.  When the object is run, this
 290      longword is set to the load address of the object, plus the
 291      addend.  */
 292   HOWTO (R_CRIS_RELATIVE,       /* type */
 293          0,                     /* rightshift */
 294          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 295          32,                    /* bitsize */
 296          FALSE,                 /* pc_relative */
 297          0,                     /* bitpos */
 298          complain_overflow_bitfield, /* complain_on_overflow */
 299          bfd_elf_generic_reloc, /* special_function */
 300          "R_CRIS_RELATIVE",     /* name */
 301          FALSE,                 /* partial_inplace */
 302          0,                     /* src_mask */
 303          0xffffffff,            /* dst_mask */
 304          FALSE),                /* pcrel_offset */
 305
 306   /* Like R_CRIS_32, but referring to the GOT table entry for the symbol.  */
 307   HOWTO (R_CRIS_16_GOT,         /* type */
 308          0,                     /* rightshift */
 309          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 310          16,                    /* bitsize */
 311          FALSE,                 /* pc_relative */
 312          0,                     /* bitpos */
 313          complain_overflow_bitfield, /* complain_on_overflow */
 314          bfd_elf_generic_reloc, /* special_function */
 315          "R_CRIS_16_GOT",       /* name */
 316          FALSE,                 /* partial_inplace */
 317          0,                     /* src_mask */
 318          0xffff,                /* dst_mask */
 319          FALSE),                /* pcrel_offset */
 320
 321   HOWTO (R_CRIS_32_GOT,         /* type */
 322          0,                     /* rightshift */
 323          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 324          32,                    /* bitsize */
 325          FALSE,                 /* pc_relative */
 326          0,                     /* bitpos */
 327          complain_overflow_bitfield, /* complain_on_overflow */
 328          bfd_elf_generic_reloc, /* special_function */
 329          "R_CRIS_32_GOT",       /* name */
 330          FALSE,                 /* partial_inplace */
 331          0,                     /* src_mask */
 332          0xffffffff,            /* dst_mask */
 333          FALSE),                /* pcrel_offset */
 334
 335   /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
 336      the GOT table for the symbol.  */
 337   HOWTO (R_CRIS_16_GOTPLT,      /* type */
 338          0,                     /* rightshift */
 339          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 340          16,                    /* bitsize */
 341          FALSE,                 /* pc_relative */
 342          0,                     /* bitpos */
 343          complain_overflow_bitfield, /* complain_on_overflow */
 344          bfd_elf_generic_reloc, /* special_function */
 345          "R_CRIS_16_GOTPLT",    /* name */
 346          FALSE,                 /* partial_inplace */
 347          0,                     /* src_mask */
 348          0xffff,                /* dst_mask */
 349          FALSE),                /* pcrel_offset */
 350
 351   HOWTO (R_CRIS_32_GOTPLT,      /* type */
 352          0,                     /* rightshift */
 353          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 354          32,                    /* bitsize */
 355          FALSE,                 /* pc_relative */
 356          0,                     /* bitpos */
 357          complain_overflow_bitfield, /* complain_on_overflow */
 358          bfd_elf_generic_reloc, /* special_function */
 359          "R_CRIS_32_GOTPLT",    /* name */
 360          FALSE,                 /* partial_inplace */
 361          0,                     /* src_mask */
 362          0xffffffff,            /* dst_mask */
 363          FALSE),                /* pcrel_offset */
 364
 365   /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
 366      be necessary.  */
 367   HOWTO (R_CRIS_32_GOTREL,      /* type */
 368          0,                     /* rightshift */
 369          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 370          32,                    /* bitsize */
 371          FALSE,                 /* pc_relative */
 372          0,                     /* bitpos */
 373          complain_overflow_bitfield, /* complain_on_overflow */
 374          bfd_elf_generic_reloc, /* special_function */
 375          "R_CRIS_32_GOTREL",    /* name */
 376          FALSE,                 /* partial_inplace */
 377          0,                     /* src_mask */
 378          0xffffffff,            /* dst_mask */
 379          FALSE),                /* pcrel_offset */
 380
 381   /* A 32-bit offset from GOT to entry for this symbol in PLT and request
 382      to create PLT entry for symbol.  */
 383   HOWTO (R_CRIS_32_PLT_GOTREL,  /* type */
 384          0,                     /* rightshift */
 385          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 386          32,                    /* bitsize */
 387          FALSE,                 /* pc_relative */
 388          0,                     /* bitpos */
 389          complain_overflow_bitfield, /* complain_on_overflow */
 390          bfd_elf_generic_reloc, /* special_function */
 391          "R_CRIS_32_PLT_GOTREL", /* name */
 392          FALSE,                 /* partial_inplace */
 393          0,                     /* src_mask */
 394          0xffffffff,            /* dst_mask */
 395          FALSE),                /* pcrel_offset */
 396
 397   /* A 32-bit offset from PC (location after the relocation) + addend to
 398      entry for this symbol in PLT and request to create PLT entry for
 399      symbol.  */
 400   HOWTO (R_CRIS_32_PLT_PCREL,   /* type */
 401          0,                     /* rightshift */
 402          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 403          32,                    /* bitsize */
 404          TRUE,                  /* pc_relative */
 405          0,                     /* bitpos */
 406          complain_overflow_bitfield, /* complain_on_overflow */
 407          cris_elf_pcrel_reloc,  /* special_function */
 408          "R_CRIS_32_PLT_PCREL", /* name */
 409          FALSE,                 /* partial_inplace */
 410          0,                     /* src_mask */
 411          0xffffffff,            /* dst_mask */
 412          TRUE)                  /* pcrel_offset */
 413 };
 414 \f
 415 /* Map BFD reloc types to CRIS ELF reloc types.  */
 416
 417 struct cris_reloc_map
 418 {
 419   bfd_reloc_code_real_type bfd_reloc_val;
 420   unsigned int cris_reloc_val;
 421 };
 422
 423 static const struct cris_reloc_map cris_reloc_map [] =
 424 {
 425   { BFD_RELOC_NONE,             R_CRIS_NONE },
 426   { BFD_RELOC_8,                R_CRIS_8 },
 427   { BFD_RELOC_16,               R_CRIS_16 },
 428   { BFD_RELOC_32,               R_CRIS_32 },
 429   { BFD_RELOC_8_PCREL,          R_CRIS_8_PCREL },
 430   { BFD_RELOC_16_PCREL,         R_CRIS_16_PCREL },
 431   { BFD_RELOC_32_PCREL,         R_CRIS_32_PCREL },
 432   { BFD_RELOC_VTABLE_INHERIT,   R_CRIS_GNU_VTINHERIT },
 433   { BFD_RELOC_VTABLE_ENTRY,     R_CRIS_GNU_VTENTRY },
 434   { BFD_RELOC_CRIS_COPY,        R_CRIS_COPY },
 435   { BFD_RELOC_CRIS_GLOB_DAT,    R_CRIS_GLOB_DAT },
 436   { BFD_RELOC_CRIS_JUMP_SLOT,   R_CRIS_JUMP_SLOT },
 437   { BFD_RELOC_CRIS_RELATIVE,    R_CRIS_RELATIVE },
 438   { BFD_RELOC_CRIS_16_GOT,      R_CRIS_16_GOT },
 439   { BFD_RELOC_CRIS_32_GOT,      R_CRIS_32_GOT },
 440   { BFD_RELOC_CRIS_16_GOTPLT,   R_CRIS_16_GOTPLT },
 441   { BFD_RELOC_CRIS_32_GOTPLT,   R_CRIS_32_GOTPLT },
 442   { BFD_RELOC_CRIS_32_GOTREL,   R_CRIS_32_GOTREL },
 443   { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
 444   { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }
 445 };
 446
 447 static reloc_howto_type *
 448 cris_reloc_type_lookup (abfd, code)
 449      bfd * abfd ATTRIBUTE_UNUSED;
 450      bfd_reloc_code_real_type code;
 451 {
 452   unsigned int i;
 453
 454   for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
 455     if (cris_reloc_map [i].bfd_reloc_val == code)
 456       return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
 457
 458   return NULL;
 459 }
 460
 461 static reloc_howto_type *
 462 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
 463 {
 464   unsigned int i;
 465
 466   for (i = 0;
 467        i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
 468        i++)
 469     if (cris_elf_howto_table[i].name != NULL
 470         && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
 471       return &cris_elf_howto_table[i];
 472
 473   return NULL;
 474 }
 475
 476 /* Set the howto pointer for an CRIS ELF reloc.  */
 477
 478 static void
 479 cris_info_to_howto_rela (abfd, cache_ptr, dst)
 480      bfd * abfd ATTRIBUTE_UNUSED;
 481      arelent * cache_ptr;
 482      Elf_Internal_Rela * dst;
 483 {
 484   unsigned int r_type;
 485
 486   r_type = ELF32_R_TYPE (dst->r_info);
 487   BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
 488   cache_ptr->howto = & cris_elf_howto_table [r_type];
 489 }
 490
 491 bfd_reloc_status_type
 492 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
 493                       output_bfd, error_message)
 494      bfd *abfd ATTRIBUTE_UNUSED;
 495      arelent *reloc_entry;
 496      asymbol *symbol;
 497      PTR data ATTRIBUTE_UNUSED;
 498      asection *input_section;
 499      bfd *output_bfd;
 500      char **error_message ATTRIBUTE_UNUSED;
 501 {
 502   /* By default (using only bfd_elf_generic_reloc when linking to
 503      non-ELF formats) PC-relative relocs are relative to the beginning
 504      of the reloc.  CRIS PC-relative relocs are relative to the position
 505      *after* the reloc because that's what pre-CRISv32 PC points to
 506      after reading an insn field with that reloc.  (For CRISv32, PC is
 507      actually relative to the start of the insn, but we keep the old
 508      definition.)  Still, we use as much generic machinery as we can.
 509
 510      Only adjust when doing a final link.  */
 511   if (output_bfd == (bfd *) NULL)
 512     reloc_entry->addend -= 1 << reloc_entry->howto->size;
 513
 514   return
 515     bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
 516                            input_section, output_bfd, error_message);
 517 }
 518 \f
 519 /* Support for core dump NOTE sections.
 520    The slightly unintuitive code layout is an attempt to keep at least
 521    some similarities with other ports, hoping to simplify general
 522    changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
 523
 524 static bfd_boolean
 525 cris_elf_grok_prstatus (abfd, note)
 526      bfd *abfd;
 527      Elf_Internal_Note *note;
 528 {
 529   int offset;
 530   size_t size;
 531
 532   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
 533     switch (note->descsz)
 534       {
 535       default:
 536         return FALSE;
 537
 538       case 202:         /* Linux/CRISv32 */
 539         /* pr_cursig */
 540         elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
 541
 542         /* pr_pid */
 543         elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
 544
 545         /* pr_reg */
 546         offset = 70;
 547         size = 128;
 548
 549         break;
 550       }
 551   else
 552     switch (note->descsz)
 553       {
 554       default:
 555         return FALSE;
 556
 557       case 214:         /* Linux/CRIS */
 558         /* pr_cursig */
 559         elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
 560
 561         /* pr_pid */
 562         elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
 563
 564         /* pr_reg */
 565         offset = 70;
 566         size = 140;
 567
 568         break;
 569       }
 570
 571   /* Make a ".reg/999" section.  */
 572   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
 573                                           size, note->descpos + offset);
 574 }
 575
 576 static bfd_boolean
 577 cris_elf_grok_psinfo (abfd, note)
 578      bfd *abfd;
 579      Elf_Internal_Note *note;
 580 {
 581   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
 582     switch (note->descsz)
 583       {
 584       default:
 585         return FALSE;
 586
 587       case 124:         /* Linux/CRISv32 elf_prpsinfo */
 588         elf_tdata (abfd)->core_program
 589           = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 590         elf_tdata (abfd)->core_command
 591           = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 592       }
 593   else
 594     switch (note->descsz)
 595       {
 596       default:
 597         return FALSE;
 598
 599       case 124:         /* Linux/CRIS elf_prpsinfo */
 600         elf_tdata (abfd)->core_program
 601           = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 602         elf_tdata (abfd)->core_command
 603           = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 604       }
 605
 606   /* Note that for some reason, a spurious space is tacked
 607      onto the end of the args in some (at least one anyway)
 608      implementations, so strip it off if it exists.  */
 609
 610   {
 611     char *command = elf_tdata (abfd)->core_command;
 612     int n = strlen (command);
 613
 614     if (0 < n && command[n - 1] == ' ')
 615       command[n - 1] = '\0';
 616   }
 617
 618   return TRUE;
 619 }
 620 \f
 621 /* The name of the dynamic interpreter.  This is put in the .interp
 622    section.  */
 623
 624 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
 625
 626 /* The size in bytes of an entry in the procedure linkage table.  */
 627
 628 #define PLT_ENTRY_SIZE 20
 629 #define PLT_ENTRY_SIZE_V32 26
 630
 631 /* The first entry in an absolute procedure linkage table looks like this.  */
 632
 633 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
 634 {
 635   0xfc, 0xe1,
 636   0x7e, 0x7e,   /* push mof.  */
 637   0x7f, 0x0d,   /*  (dip [pc+]) */
 638   0, 0, 0, 0,   /*  Replaced with address of .got + 4.  */
 639   0x30, 0x7a,   /* move [...],mof */
 640   0x7f, 0x0d,   /*  (dip [pc+]) */
 641   0, 0, 0, 0,   /*  Replaced with address of .got + 8.  */
 642   0x30, 0x09    /* jump [...] */
 643 };
 644
 645 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
 646 {
 647   0x84, 0xe2,   /* subq 4,$sp */
 648   0x6f, 0xfe,   /* move.d 0,$acr */
 649   0, 0, 0, 0,   /*  Replaced by address of .got + 4.  */
 650   0x7e, 0x7a,   /* move $mof,[$sp] */
 651   0x3f, 0x7a,   /* move [$acr],$mof */
 652   0x04, 0xf2,   /* addq 4,acr */
 653   0x6f, 0xfa,   /* move.d [$acr],$acr */
 654   0xbf, 0x09,   /* jump $acr */
 655   0xb0, 0x05,   /* nop */
 656   0, 0          /*  Pad out to 26 bytes.  */
 657 };
 658
 659 /* Subsequent entries in an absolute procedure linkage table look like
 660    this.  */
 661
 662 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
 663 {
 664   0x7f, 0x0d,   /*  (dip [pc+]) */
 665   0, 0, 0, 0,   /*  Replaced with address of this symbol in .got.  */
 666   0x30, 0x09,   /* jump [...] */
 667   0x3f,  0x7e,  /* move [pc+],mof */
 668   0, 0, 0, 0,   /*  Replaced with offset into relocation table.  */
 669   0x2f, 0xfe,   /* add.d [pc+],pc */
 670   0xec, 0xff,
 671   0xff, 0xff    /*  Replaced with offset to start of .plt.  */
 672 };
 673
 674 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
 675 {
 676   0x6f, 0xfe,   /* move.d 0,$acr */
 677   0, 0, 0, 0,   /*  Replaced with address of this symbol in .got.  */
 678   0x6f, 0xfa,   /* move.d [$acr],$acr */
 679   0xbf, 0x09,   /* jump $acr */
 680   0xb0, 0x05,   /* nop */
 681   0x3f, 0x7e,   /* move 0,mof */
 682   0, 0, 0, 0,   /*  Replaced with offset into relocation table. */
 683   0xbf, 0x0e,   /* ba start_of_plt0_entry */
 684   0, 0, 0, 0,   /*  Replaced with offset to plt0 entry.  */
 685   0xb0, 0x05    /* nop */
 686 };
 687
 688 /* The first entry in a PIC procedure linkage table looks like this.  */
 689
 690 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
 691 {
 692   0xfc, 0xe1, 0x7e, 0x7e,       /* push mof */
 693   0x04, 0x01, 0x30, 0x7a,       /* move [r0+4],mof */
 694   0x08, 0x01, 0x30, 0x09,       /* jump [r0+8] */
 695   0, 0, 0, 0, 0, 0, 0, 0,       /*  Pad out to 20 bytes.  */
 696 };
 697
 698 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
 699 {
 700   0x84, 0xe2,   /* subq 4,$sp */
 701   0x04, 0x01,   /* addoq 4,$r0,$acr */
 702   0x7e, 0x7a,   /* move $mof,[$sp] */
 703   0x3f, 0x7a,   /* move [$acr],$mof */
 704   0x04, 0xf2,   /* addq 4,$acr */
 705   0x6f, 0xfa,   /* move.d [$acr],$acr */
 706   0xbf, 0x09,   /* jump $acr */
 707   0xb0, 0x05,   /* nop */
 708   0, 0,         /*  Pad out to 26 bytes.  */
 709   0, 0, 0, 0,
 710   0, 0, 0, 0
 711 };
 712
 713 /* Subsequent entries in a PIC procedure linkage table look like this.  */
 714
 715 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
 716 {
 717   0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
 718   0, 0, 0, 0,   /*  Replaced with offset of this symbol in .got.  */
 719   0x30, 0x09,   /* jump [...] */
 720   0x3f, 0x7e,   /* move [pc+],mof */
 721   0, 0, 0, 0,   /*  Replaced with offset into relocation table.  */
 722   0x2f, 0xfe,   /* add.d [pc+],pc */
 723   0xec, 0xff,   /*  Replaced with offset to start of .plt.  */
 724   0xff, 0xff
 725 };
 726
 727 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
 728 {
 729   0x6f, 0x0d,   /* addo.d 0,$r0,$acr */
 730   0, 0, 0, 0,   /*  Replaced with offset of this symbol in .got.  */
 731   0x6f, 0xfa,   /* move.d [$acr],$acr */
 732   0xbf, 0x09,   /* jump $acr */
 733   0xb0, 0x05,   /* nop */
 734   0x3f, 0x7e,   /* move relocoffs,$mof */
 735   0, 0, 0, 0,   /*  Replaced with offset into relocation table.  */
 736   0xbf, 0x0e,   /* ba start_of_plt */
 737   0, 0, 0, 0,   /*  Replaced with offset to start of .plt.  */
 738   0xb0, 0x05    /* nop */
 739 };
 740 \f
 741 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
 742    (and most other PIC/shlib stuff).  Check that we don't drift away
 743    without reason.
 744
 745    The CRIS linker, like the m68k and i386 linkers (and probably the rest
 746    too) needs to keep track of the number of relocs that it decides to
 747    copy in check_relocs for each symbol.  This is so that it can discard
 748    PC relative relocs if it doesn't need them when linking with
 749    -Bsymbolic.  We store the information in a field extending the regular
 750    ELF linker hash table.  */
 751
 752 /* This structure keeps track of the number of PC relative relocs we have
 753    copied for a given symbol.  */
 754
 755 struct elf_cris_pcrel_relocs_copied
 756 {
 757   /* Next section.  */
 758   struct elf_cris_pcrel_relocs_copied *next;
 759   /* A section in dynobj.  */
 760   asection *section;
 761   /* Number of relocs copied in this section.  */
 762   bfd_size_type count;
 763 };
 764
 765 /* CRIS ELF linker hash entry.  */
 766
 767 struct elf_cris_link_hash_entry
 768 {
 769   struct elf_link_hash_entry root;
 770
 771   /* Number of PC relative relocs copied for this symbol.  */
 772   struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
 773
 774   /* The GOTPLT references are CRIS-specific; the goal is to avoid having
 775      both a general GOT and a PLT-specific GOT entry for the same symbol,
 776      when it is referenced both as a function and as a function pointer.
 777
 778      Number of GOTPLT references for a function.  */
 779   bfd_signed_vma gotplt_refcount;
 780
 781   /* Actual GOTPLT index for this symbol, if applicable, or zero if not
 782      (zero is never used as an index).  FIXME: We should be able to fold
 783      this with gotplt_refcount in a union, like the got and plt unions in
 784      elf_link_hash_entry.  */
 785   bfd_size_type gotplt_offset;
 786 };
 787
 788 /* CRIS ELF linker hash table.  */
 789
 790 struct elf_cris_link_hash_table
 791 {
 792   struct elf_link_hash_table root;
 793
 794   /* We can't use the PLT offset and calculate to get the GOTPLT offset,
 795      since we try and avoid creating GOTPLT:s when there's already a GOT.
 796      Instead, we keep and update the next available index here.  */
 797   bfd_size_type next_gotplt_entry;
 798 };
 799
 800 /* Traverse a CRIS ELF linker hash table.  */
 801
 802 #define elf_cris_link_hash_traverse(table, func, info)                  \
 803   (elf_link_hash_traverse                                               \
 804    (&(table)->root,                                                     \
 805     (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
 806     (info)))
 807
 808 /* Get the CRIS ELF linker hash table from a link_info structure.  */
 809
 810 #define elf_cris_hash_table(p) \
 811   ((struct elf_cris_link_hash_table *) (p)->hash)
 812
 813 /* Create an entry in a CRIS ELF linker hash table.  */
 814
 815 static struct bfd_hash_entry *
 816 elf_cris_link_hash_newfunc (entry, table, string)
 817      struct bfd_hash_entry *entry;
 818      struct bfd_hash_table *table;
 819      const char *string;
 820 {
 821   struct elf_cris_link_hash_entry *ret =
 822     (struct elf_cris_link_hash_entry *) entry;
 823
 824   /* Allocate the structure if it has not already been allocated by a
 825      subclass.  */
 826   if (ret == (struct elf_cris_link_hash_entry *) NULL)
 827     ret = ((struct elf_cris_link_hash_entry *)
 828            bfd_hash_allocate (table,
 829                               sizeof (struct elf_cris_link_hash_entry)));
 830   if (ret == (struct elf_cris_link_hash_entry *) NULL)
 831     return (struct bfd_hash_entry *) ret;
 832
 833   /* Call the allocation method of the superclass.  */
 834   ret = ((struct elf_cris_link_hash_entry *)
 835          _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
 836                                      table, string));
 837   if (ret != (struct elf_cris_link_hash_entry *) NULL)
 838     {
 839       ret->pcrel_relocs_copied = NULL;
 840       ret->gotplt_refcount = 0;
 841       ret->gotplt_offset = 0;
 842     }
 843
 844   return (struct bfd_hash_entry *) ret;
 845 }
 846
 847 /* Create a CRIS ELF linker hash table.  */
 848
 849 static struct bfd_link_hash_table *
 850 elf_cris_link_hash_table_create (abfd)
 851      bfd *abfd;
 852 {
 853   struct elf_cris_link_hash_table *ret;
 854   bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
 855
 856   ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
 857   if (ret == (struct elf_cris_link_hash_table *) NULL)
 858     return NULL;
 859
 860   if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
 861                                       elf_cris_link_hash_newfunc,
 862                                       sizeof (struct elf_cris_link_hash_entry)))
 863     {
 864       free (ret);
 865       return NULL;
 866     }
 867
 868   /* Initialize to skip over the first three entries in the gotplt; they
 869      are used for run-time symbol evaluation.  */
 870   ret->next_gotplt_entry = 12;
 871
 872   return &ret->root.root;
 873 }
 874 \f
 875 /* Perform a single relocation.  By default we use the standard BFD
 876    routines, with a few tweaks.  */
 877
 878 static bfd_reloc_status_type
 879 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
 880                           relocation)
 881      reloc_howto_type *  howto;
 882      bfd *               input_bfd;
 883      asection *          input_section;
 884      bfd_byte *          contents;
 885      Elf_Internal_Rela * rel;
 886      bfd_vma             relocation;
 887 {
 888   bfd_reloc_status_type r;
 889
 890   /* PC-relative relocations are relative to the position *after*
 891      the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
 892      not a single byte, since PC must be 16-bit-aligned.  */
 893   switch (ELF32_R_TYPE (rel->r_info))
 894     {
 895       /* Check that the 16-bit GOT relocs are positive.  */
 896     case R_CRIS_16_GOTPLT:
 897     case R_CRIS_16_GOT:
 898       if ((bfd_signed_vma) relocation < 0)
 899         return bfd_reloc_overflow;
 900       break;
 901
 902     case R_CRIS_32_PLT_PCREL:
 903     case R_CRIS_32_PCREL:
 904       relocation -= 2;
 905       /* Fall through.  */
 906     case R_CRIS_8_PCREL:
 907     case R_CRIS_16_PCREL:
 908       relocation -= 2;
 909       break;
 910
 911     default:
 912       break;
 913     }
 914
 915   r = _bfd_final_link_relocate (howto, input_bfd, input_section,
 916                                 contents, rel->r_offset,
 917                                 relocation, rel->r_addend);
 918   return r;
 919 }
 920 \f
 921 /* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
 922    copied, for further comments.  */
 923
 924 static bfd_boolean
 925 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
 926                            contents, relocs, local_syms, local_sections)
 927      bfd *output_bfd ATTRIBUTE_UNUSED;
 928      struct bfd_link_info *info;
 929      bfd *input_bfd;
 930      asection *input_section;
 931      bfd_byte *contents;
 932      Elf_Internal_Rela *relocs;
 933      Elf_Internal_Sym *local_syms;
 934      asection **local_sections;
 935 {
 936   bfd *dynobj;
 937   Elf_Internal_Shdr *symtab_hdr;
 938   struct elf_link_hash_entry **sym_hashes;
 939   bfd_vma *local_got_offsets;
 940   asection *sgot;
 941   asection *splt;
 942   asection *sreloc;
 943   Elf_Internal_Rela *rel;
 944   Elf_Internal_Rela *relend;
 945
 946   dynobj = elf_hash_table (info)->dynobj;
 947   local_got_offsets = elf_local_got_offsets (input_bfd);
 948   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
 949   sym_hashes = elf_sym_hashes (input_bfd);
 950   relend     = relocs + input_section->reloc_count;
 951
 952   sgot = NULL;
 953   splt = NULL;
 954   sreloc = NULL;
 955
 956   if (dynobj != NULL)
 957     {
 958       splt = bfd_get_section_by_name (dynobj, ".plt");
 959       sgot = bfd_get_section_by_name (dynobj, ".got");
 960     }
 961
 962   for (rel = relocs; rel < relend; rel ++)
 963     {
 964       reloc_howto_type *howto;
 965       unsigned long r_symndx;
 966       Elf_Internal_Sym *sym;
 967       asection *sec;
 968       struct elf_link_hash_entry *h;
 969       bfd_vma relocation;
 970       bfd_reloc_status_type r;
 971       const char *symname = NULL;
 972       int r_type;
 973
 974       r_type = ELF32_R_TYPE (rel->r_info);
 975
 976       if (   r_type == R_CRIS_GNU_VTINHERIT
 977           || r_type == R_CRIS_GNU_VTENTRY)
 978         continue;
 979
 980       r_symndx = ELF32_R_SYM (rel->r_info);
 981       howto  = cris_elf_howto_table + r_type;
 982       h      = NULL;
 983       sym    = NULL;
 984       sec    = NULL;
 985
 986       if (r_symndx < symtab_hdr->sh_info)
 987         {
 988           sym = local_syms + r_symndx;
 989           sec = local_sections [r_symndx];
 990           relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
 991
 992           symname = (bfd_elf_string_from_elf_section
 993                      (input_bfd, symtab_hdr->sh_link, sym->st_name));
 994           if (symname == NULL)
 995             symname = bfd_section_name (input_bfd, sec);
 996         }
 997       else
 998         {
 999           bfd_boolean warned;
1000           bfd_boolean unresolved_reloc;
1001
1002           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1003                                    r_symndx, symtab_hdr, sym_hashes,
1004                                    h, sec, relocation,
1005                                    unresolved_reloc, warned);
1006
1007           if (unresolved_reloc
1008               /* Perhaps we should detect the cases that
1009                  sec->output_section is expected to be NULL like i386 and
1010                  m68k, but apparently (and according to elfxx-ia64.c) all
1011                  valid cases are where the symbol is defined in a shared
1012                  object which we link dynamically against.  This includes
1013                  PLT relocs for which we've created a PLT entry and other
1014                  relocs for which we're prepared to create dynamic
1015                  relocations.
1016
1017                  For now, new situations cause us to just err when
1018                  sec->output_offset is NULL but the object with the symbol
1019                  is *not* dynamically linked against.  Thus this will
1020                  automatically remind us so we can see if there are other
1021                  valid cases we need to revisit.  */
1022               && (sec->owner->flags & DYNAMIC) != 0)
1023             relocation = 0;
1024
1025           else if (h->root.type == bfd_link_hash_defined
1026                    || h->root.type == bfd_link_hash_defweak)
1027             {
1028               /* Here follow the cases where the relocation value must
1029                  be zero (or when further handling is simplified when
1030                  zero).  I can't claim to understand the various
1031                  conditions and they weren't described in the files
1032                  where I copied them from (elf32-m68k.c and
1033                  elf32-i386.c), but let's mention examples of where
1034                  they happen.  FIXME: Perhaps define and use a
1035                  dynamic_symbol_p function like ia64.
1036
1037                  - When creating a shared library, we can have an
1038                  ordinary relocation for a symbol defined in a shared
1039                  library (perhaps the one we create).  We then make
1040                  the relocation value zero, as the value seen now will
1041                  be added into the relocation addend in this shared
1042                  library, but must be handled only at dynamic-link
1043                  time.  FIXME: Not sure this example covers the
1044                  h->elf_link_hash_flags test, though it's there in
1045                  other targets.  */
1046               if (info->shared
1047                   && ((! info->symbolic && h->dynindx != -1)
1048                       || !h->def_regular)
1049                   && (input_section->flags & SEC_ALLOC) != 0
1050                   && (r_type == R_CRIS_8
1051                       || r_type == R_CRIS_16
1052                       || r_type == R_CRIS_32
1053                       || r_type == R_CRIS_8_PCREL
1054                       || r_type == R_CRIS_16_PCREL
1055                       || r_type == R_CRIS_32_PCREL))
1056                 relocation = 0;
1057               else if (!info->relocatable && unresolved_reloc)
1058                 {
1059                   _bfd_error_handler
1060                     (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1061                      input_bfd,
1062                      input_section,
1063                      cris_elf_howto_table[r_type].name,
1064                      symname);
1065                   bfd_set_error (bfd_error_bad_value);
1066                   return FALSE;
1067                 }
1068             }
1069         }
1070
1071       if (sec != NULL && elf_discarded_section (sec))
1072         {
1073           /* For relocs against symbols from removed linkonce sections,
1074              or sections discarded by a linker script, we just want the
1075              section contents zeroed.  Avoid any special processing.  */
1076           _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1077           rel->r_info = 0;
1078           rel->r_addend = 0;
1079           continue;
1080         }
1081
1082       if (info->relocatable)
1083         continue;
1084
1085       switch (r_type)
1086         {
1087         case R_CRIS_16_GOTPLT:
1088         case R_CRIS_32_GOTPLT:
1089           /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1090              but we require a PLT, and the PLT handling will take care of
1091              filling in the PLT-specific GOT entry.  For the GOT offset,
1092              calculate it as we do when filling it in for the .got.plt
1093              section.  If we don't have a PLT, punt to GOT handling.  */
1094           if (h != NULL
1095               && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1096             {
1097               asection *sgotplt
1098                 = bfd_get_section_by_name (dynobj, ".got.plt");
1099               bfd_vma got_offset;
1100
1101               BFD_ASSERT (h->dynindx != -1);
1102               BFD_ASSERT (sgotplt != NULL);
1103
1104               got_offset
1105                 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1106
1107               relocation = got_offset;
1108               break;
1109             }
1110
1111           /* We didn't make a PLT entry for this symbol.  Maybe everything is
1112              folded into the GOT.  Other than folding, this happens when
1113              statically linking PIC code, or when using -Bsymbolic.  Check
1114              that we instead have a GOT entry as done for us by
1115              elf_cris_adjust_dynamic_symbol, and drop through into the
1116              ordinary GOT cases.  This must not happen for the
1117              executable, because any reference it does to a function
1118              that is satisfied by a DSO must generate a PLT.  We assume
1119              these call-specific relocs don't address non-functions.  */
1120           if (h != NULL
1121               && (h->got.offset == (bfd_vma) -1
1122                   || (!info->shared
1123                       && !(h->def_regular
1124                            || (!h->def_dynamic
1125                                && h->root.type == bfd_link_hash_undefweak)))))
1126             {
1127               (*_bfd_error_handler)
1128                 ((h->got.offset == (bfd_vma) -1)
1129                  ? _("%B, section %A: No PLT nor GOT for relocation %s"
1130                      " against symbol `%s'")
1131                  : _("%B, section %A: No PLT for relocation %s"
1132                      " against symbol `%s'"),
1133                  input_bfd,
1134                  input_section,
1135                  cris_elf_howto_table[r_type].name,
1136                  (symname != NULL && symname[0] != '\0'
1137                   ? symname : _("[whose name is lost]")));
1138
1139               /* FIXME: Perhaps blaming input is not the right thing to
1140                  do; this is probably an internal error.  But it is true
1141                  that we didn't like that particular input.  */
1142               bfd_set_error (bfd_error_bad_value);
1143               return FALSE;
1144             }
1145           /* Fall through.  */
1146
1147           /* The size of the actual relocation is not used here; we only
1148              fill in the GOT table here.  */
1149         case R_CRIS_16_GOT:
1150         case R_CRIS_32_GOT:
1151           {
1152             bfd_vma off;
1153
1154             /* Note that despite using RELA relocations, the .got contents
1155                is always filled in with the link-relative relocation
1156                value; the addend.  */
1157
1158             if (h != NULL)
1159               {
1160                 off = h->got.offset;
1161                 BFD_ASSERT (off != (bfd_vma) -1);
1162
1163                 if (!elf_hash_table (info)->dynamic_sections_created
1164                     || (! info->shared
1165                         && (h->def_regular
1166                             || h->type == STT_FUNC
1167                             || h->needs_plt))
1168                     || (info->shared
1169                         && (info->symbolic || h->dynindx == -1)
1170                         && h->def_regular))
1171                   {
1172                     /* This wasn't checked above for ! info->shared, but
1173                        must hold there if we get here; the symbol must
1174                        be defined in the regular program or be undefweak
1175                        or be a function or otherwise need a PLT.  */
1176                     BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1177                                 || info->shared
1178                                 || h->def_regular
1179                                 || h->type == STT_FUNC
1180                                 || h->needs_plt
1181                                 || h->root.type == bfd_link_hash_undefweak);
1182
1183                     /* This is actually a static link, or it is a
1184                        -Bsymbolic link and the symbol is defined locally,
1185                        or is undefweak, or the symbol was forced to be
1186                        local because of a version file, or we're not
1187                        creating a dynamic object.  We must initialize this
1188                        entry in the global offset table.  Since the offset
1189                        must always be a multiple of 4, we use the least
1190                        significant bit to record whether we have
1191                        initialized it already.
1192
1193                        If this GOT entry should be runtime-initialized, we
1194                        will create a .rela.got relocation entry to
1195                        initialize the value.  This is done in the
1196                        finish_dynamic_symbol routine.  */
1197                     if ((off & 1) != 0)
1198                       off &= ~1;
1199                     else
1200                       {
1201                         bfd_put_32 (output_bfd, relocation,
1202                                     sgot->contents + off);
1203                         h->got.offset |= 1;
1204                       }
1205                   }
1206               }
1207             else
1208               {
1209                 BFD_ASSERT (local_got_offsets != NULL
1210                             && local_got_offsets[r_symndx] != (bfd_vma) -1);
1211
1212                 off = local_got_offsets[r_symndx];
1213
1214                 /* The offset must always be a multiple of 4.  We use
1215                    the least significant bit to record whether we have
1216                    already generated the necessary reloc.  */
1217                 if ((off & 1) != 0)
1218                   off &= ~1;
1219                 else
1220                   {
1221                     bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1222
1223                     if (info->shared)
1224                       {
1225                         asection *s;
1226                         Elf_Internal_Rela outrel;
1227                         bfd_byte *loc;
1228
1229                         s = bfd_get_section_by_name (dynobj, ".rela.got");
1230                         BFD_ASSERT (s != NULL);
1231
1232                         outrel.r_offset = (sgot->output_section->vma
1233                                            + sgot->output_offset
1234                                            + off);
1235                         outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1236                         outrel.r_addend = relocation;
1237                         loc = s->contents;
1238                         loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1239                         bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1240                       }
1241
1242                     local_got_offsets[r_symndx] |= 1;
1243                   }
1244               }
1245
1246             relocation = sgot->output_offset + off;
1247             if (rel->r_addend != 0)
1248               {
1249                 /* We can't do anything for a relocation which is against
1250                    a symbol *plus offset*.  GOT holds relocations for
1251                    symbols.  Make this an error; the compiler isn't
1252                    allowed to pass us these kinds of things.  */
1253                 if (h == NULL)
1254                   (*_bfd_error_handler)
1255                     (_("%B, section %A: relocation %s with non-zero addend %d"
1256                        " against local symbol"),
1257                      input_bfd,
1258                      input_section,
1259                      cris_elf_howto_table[r_type].name,
1260                      rel->r_addend);
1261                 else
1262                   (*_bfd_error_handler)
1263                     (_("%B, section %A: relocation %s with non-zero addend %d"
1264                        " against symbol `%s'"),
1265                      input_bfd,
1266                      input_section,
1267                      cris_elf_howto_table[r_type].name,
1268                      rel->r_addend,
1269                      symname[0] != '\0' ? symname : _("[whose name is lost]"));
1270
1271                 bfd_set_error (bfd_error_bad_value);
1272                 return FALSE;
1273               }
1274           }
1275           break;
1276
1277         case R_CRIS_32_GOTREL:
1278           /* This relocation must only be performed against local symbols.
1279              It's also ok when we link a program and the symbol is either
1280              defined in an ordinary (non-DSO) object or is undefined weak.  */
1281           if (h != NULL
1282               && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1283               && !(!info->shared
1284                    && (h->def_regular
1285                        || (!h->def_dynamic
1286                            && h->root.type == bfd_link_hash_undefweak))))
1287             {
1288               (*_bfd_error_handler)
1289                 (_("%B, section %A: relocation %s is"
1290                    " not allowed for global symbol: `%s'"),
1291                  input_bfd,
1292                  input_section,
1293                  cris_elf_howto_table[r_type].name,
1294                  symname);
1295               bfd_set_error (bfd_error_bad_value);
1296               return FALSE;
1297             }
1298
1299           /* This can happen if we get a link error with the input ELF
1300              variant mismatching the output variant.  Emit an error so
1301              it's noticed if it happens elsewhere.  */
1302           if (sgot == NULL)
1303             {
1304               (*_bfd_error_handler)
1305                 (_("%B, section %A: relocation %s with no GOT created"),
1306                  input_bfd,
1307                  input_section,
1308                  cris_elf_howto_table[r_type].name);
1309               bfd_set_error (bfd_error_bad_value);
1310               return FALSE;
1311             }
1312
1313           /* This relocation is like a PC-relative one, except the
1314              reference point is the location of GOT.  Note that
1315              sgot->output_offset is not involved in this calculation.  We
1316              always want the start of entire .got section, not the
1317              position after the reserved header.  */
1318           relocation -= sgot->output_section->vma;
1319           break;
1320
1321         case R_CRIS_32_PLT_PCREL:
1322           /* Relocation is to the entry for this symbol in the
1323              procedure linkage table.  */
1324
1325           /* Resolve a PLT_PCREL reloc against a local symbol directly,
1326              without using the procedure linkage table.  */
1327           if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1328             break;
1329
1330           if (h->plt.offset == (bfd_vma) -1
1331               || splt == NULL)
1332             {
1333               /* We didn't make a PLT entry for this symbol.  This
1334                  happens when statically linking PIC code, or when
1335                  using -Bsymbolic.  */
1336               break;
1337             }
1338
1339           relocation = (splt->output_section->vma
1340                         + splt->output_offset
1341                         + h->plt.offset);
1342           break;
1343
1344         case R_CRIS_32_PLT_GOTREL:
1345           /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1346              start of the .got section.  See also comment at
1347              R_CRIS_32_GOT.  */
1348           relocation -= sgot->output_section->vma;
1349
1350           /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1351              without using the procedure linkage table.  */
1352           if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1353             break;
1354
1355           if (h->plt.offset == (bfd_vma) -1
1356               || splt == NULL)
1357             {
1358               /* We didn't make a PLT entry for this symbol.  This
1359                  happens when statically linking PIC code, or when
1360                  using -Bsymbolic.  */
1361               break;
1362             }
1363
1364           relocation = (splt->output_section->vma
1365                         + splt->output_offset
1366                         + h->plt.offset
1367                         - sgot->output_section->vma);
1368           break;
1369
1370         case R_CRIS_8_PCREL:
1371         case R_CRIS_16_PCREL:
1372         case R_CRIS_32_PCREL:
1373           /* If the symbol was local, we need no shlib-specific handling.  */
1374           if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1375             break;
1376
1377           /* Fall through.  */
1378         case R_CRIS_8:
1379         case R_CRIS_16:
1380         case R_CRIS_32:
1381           if (info->shared
1382               && r_symndx != 0
1383               && (input_section->flags & SEC_ALLOC) != 0
1384               && ((r_type != R_CRIS_8_PCREL
1385                    && r_type != R_CRIS_16_PCREL
1386                    && r_type != R_CRIS_32_PCREL)
1387                   || (!info->symbolic
1388                       || !h->def_regular)))
1389             {
1390               Elf_Internal_Rela outrel;
1391               bfd_byte *loc;
1392               bfd_boolean skip, relocate;
1393
1394               /* When generating a shared object, these relocations
1395                  are copied into the output file to be resolved at run
1396                  time.  */
1397
1398               if (sreloc == NULL)
1399                 {
1400                   const char *name;
1401
1402                   name = (bfd_elf_string_from_elf_section
1403                           (input_bfd,
1404                            elf_elfheader (input_bfd)->e_shstrndx,
1405                            elf_section_data (input_section)->rel_hdr.sh_name));
1406                   if (name == NULL)
1407                     return FALSE;
1408
1409                   BFD_ASSERT (CONST_STRNEQ (name, ".rela")
1410                               && strcmp (bfd_get_section_name (input_bfd,
1411                                                                input_section),
1412                                          name + 5) == 0);
1413
1414                   sreloc = bfd_get_section_by_name (dynobj, name);
1415
1416                   /* That section should have been created in
1417                      cris_elf_check_relocs, but that function will not be
1418                      called for objects which fail in
1419                      cris_elf_merge_private_bfd_data.  */
1420                   if (sreloc == NULL)
1421                     {
1422                       (*_bfd_error_handler)
1423                         (_("%B: Internal inconsistency; no relocation section %s"),
1424                          input_bfd,
1425                          name);
1426
1427                       bfd_set_error (bfd_error_bad_value);
1428                       return FALSE;
1429                     }
1430                 }
1431
1432               skip = FALSE;
1433               relocate = FALSE;
1434
1435               outrel.r_offset =
1436                 _bfd_elf_section_offset (output_bfd, info, input_section,
1437                                          rel->r_offset);
1438               if (outrel.r_offset == (bfd_vma) -1)
1439                 skip = TRUE;
1440               else if (outrel.r_offset == (bfd_vma) -2)
1441                 skip = TRUE, relocate = TRUE;
1442               outrel.r_offset += (input_section->output_section->vma
1443                                   + input_section->output_offset);
1444
1445               if (skip)
1446                 memset (&outrel, 0, sizeof outrel);
1447               /* h->dynindx may be -1 if the symbol was marked to
1448                  become local.  */
1449               else if (h != NULL
1450                        && ((! info->symbolic && h->dynindx != -1)
1451                            || !h->def_regular))
1452                 {
1453                   BFD_ASSERT (h->dynindx != -1);
1454                   outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1455                   outrel.r_addend = relocation + rel->r_addend;
1456                 }
1457               else
1458                 {
1459                   outrel.r_addend = relocation + rel->r_addend;
1460
1461                   if (r_type == R_CRIS_32)
1462                     {
1463                       relocate = TRUE;
1464                       outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1465                     }
1466                   else
1467                     {
1468                       long indx;
1469
1470                       if (bfd_is_abs_section (sec))
1471                         indx = 0;
1472                       else if (sec == NULL || sec->owner == NULL)
1473                         {
1474                           bfd_set_error (bfd_error_bad_value);
1475                           return FALSE;
1476                         }
1477                       else
1478                         {
1479                           asection *osec;
1480
1481                           /* We are turning this relocation into one
1482                              against a section symbol.  It would be
1483                              proper to subtract the symbol's value,
1484                              osec->vma, from the emitted reloc addend,
1485                              but ld.so expects buggy relocs.  */
1486                           osec = sec->output_section;
1487                           indx = elf_section_data (osec)->dynindx;
1488                           if (indx == 0)
1489                             {
1490                               struct elf_cris_link_hash_table *htab;
1491                               htab = elf_cris_hash_table (info);
1492                               osec = htab->root.text_index_section;
1493                               indx = elf_section_data (osec)->dynindx;
1494                             }
1495                           BFD_ASSERT (indx != 0);
1496                         }
1497
1498                       outrel.r_info = ELF32_R_INFO (indx, r_type);
1499                     }
1500                 }
1501
1502               loc = sreloc->contents;
1503               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1504               bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1505
1506               /* This reloc will be computed at runtime, so there's no
1507                  need to do anything now, except for R_CRIS_32 relocations
1508                  that have been turned into R_CRIS_RELATIVE.  */
1509               if (!relocate)
1510                 continue;
1511             }
1512
1513           break;
1514         }
1515
1516       r = cris_final_link_relocate (howto, input_bfd, input_section,
1517                                      contents, rel, relocation);
1518
1519       if (r != bfd_reloc_ok)
1520         {
1521           const char * msg = (const char *) NULL;
1522
1523           switch (r)
1524             {
1525             case bfd_reloc_overflow:
1526               r = info->callbacks->reloc_overflow
1527                 (info, (h ? &h->root : NULL), symname, howto->name,
1528                  (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1529               break;
1530
1531             case bfd_reloc_undefined:
1532               r = info->callbacks->undefined_symbol
1533                 (info, symname, input_bfd, input_section, rel->r_offset,
1534                  TRUE);
1535               break;
1536
1537             case bfd_reloc_outofrange:
1538               msg = _("internal error: out of range error");
1539               break;
1540
1541             case bfd_reloc_notsupported:
1542               msg = _("internal error: unsupported relocation error");
1543               break;
1544
1545             case bfd_reloc_dangerous:
1546               msg = _("internal error: dangerous relocation");
1547               break;
1548
1549             default:
1550               msg = _("internal error: unknown error");
1551               break;
1552             }
1553
1554           if (msg)
1555             r = info->callbacks->warning
1556               (info, msg, symname, input_bfd, input_section, rel->r_offset);
1557
1558           if (! r)
1559             return FALSE;
1560         }
1561     }
1562
1563   return TRUE;
1564 }
1565 \f
1566 /* Finish up dynamic symbol handling.  We set the contents of various
1567    dynamic sections here.  */
1568
1569 static bfd_boolean
1570 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
1571      bfd *output_bfd;
1572      struct bfd_link_info *info;
1573      struct elf_link_hash_entry *h;
1574      Elf_Internal_Sym *sym;
1575 {
1576   bfd *dynobj;
1577
1578   /* Where in the plt entry to put values.  */
1579   int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
1580
1581   /* What offset to add to the distance to the first PLT entry for the
1582      value at plt_off3.   */
1583   int plt_off3_value_bias = 4;
1584
1585   /* Where in the PLT entry the call-dynlink-stub is (happens to be same
1586      for PIC and non-PIC for v32 and pre-v32).  */
1587   int plt_stub_offset = 8;
1588   int plt_entry_size = PLT_ENTRY_SIZE;
1589   const bfd_byte *plt_entry = elf_cris_plt_entry;
1590   const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
1591
1592   /* Adjust the various PLT entry offsets.  */
1593   if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1594     {
1595       plt_off2 = 14;
1596       plt_off3 = 20;
1597       plt_off3_value_bias = -2;
1598       plt_stub_offset = 12;
1599       plt_entry_size = PLT_ENTRY_SIZE_V32;
1600       plt_entry = elf_cris_plt_entry_v32;
1601       plt_pic_entry = elf_cris_pic_plt_entry_v32;
1602     }
1603
1604   dynobj = elf_hash_table (info)->dynobj;
1605
1606   if (h->plt.offset != (bfd_vma) -1)
1607     {
1608       asection *splt;
1609       asection *sgotplt;
1610       asection *sgot;
1611       asection *srela;
1612       bfd_vma got_base;
1613
1614       bfd_vma gotplt_offset
1615         = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1616       Elf_Internal_Rela rela;
1617       bfd_byte *loc;
1618       bfd_boolean has_gotplt = gotplt_offset != 0;
1619
1620       /* Get the index in the procedure linkage table which
1621          corresponds to this symbol.  This is the index of this symbol
1622          in all the symbols for which we are making plt entries.  The
1623          first entry in the procedure linkage table is reserved.  */
1624       /* We have to count backwards here, and the result is only valid as
1625          an index into .got.plt and its relocations.  FIXME: Constants...  */
1626       bfd_vma gotplt_index = gotplt_offset/4 - 3;
1627
1628       /* Get the offset into the .got table of the entry that corresponds
1629          to this function.  Note that we embed knowledge that "incoming"
1630          .got goes after .got.plt in the output without padding (pointer
1631          aligned).  However, that knowledge is present in several other
1632          places too.  */
1633       bfd_vma got_offset
1634         = (has_gotplt
1635            ? gotplt_offset
1636            : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
1637
1638       /* This symbol has an entry in the procedure linkage table.  Set it
1639          up.  */
1640
1641       BFD_ASSERT (h->dynindx != -1);
1642
1643       splt = bfd_get_section_by_name (dynobj, ".plt");
1644       sgot = bfd_get_section_by_name (dynobj, ".got");
1645       sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1646       srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1647       BFD_ASSERT (splt != NULL && sgotplt != NULL
1648                   && (! has_gotplt || srela != NULL));
1649
1650       got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1651
1652       /* Fill in the entry in the procedure linkage table.  */
1653       if (! info->shared)
1654         {
1655           memcpy (splt->contents + h->plt.offset, plt_entry,
1656                   plt_entry_size);
1657
1658           /* We need to enter the absolute address of the GOT entry here.  */
1659           bfd_put_32 (output_bfd, got_base + got_offset,
1660                       splt->contents + h->plt.offset + plt_off1);
1661         }
1662       else
1663         {
1664           memcpy (splt->contents + h->plt.offset, plt_pic_entry,
1665                   plt_entry_size);
1666           bfd_put_32 (output_bfd, got_offset,
1667                       splt->contents + h->plt.offset + plt_off1);
1668         }
1669
1670       /* Fill in the plt entry and make a relocation, if this is a "real"
1671          PLT entry.  */
1672       if (has_gotplt)
1673         {
1674           /* Fill in the offset to the reloc table.  */
1675           bfd_put_32 (output_bfd,
1676                       gotplt_index * sizeof (Elf32_External_Rela),
1677                       splt->contents + h->plt.offset + plt_off2);
1678
1679           /* Fill in the offset to the first PLT entry, where to "jump".  */
1680           bfd_put_32 (output_bfd,
1681                       - (h->plt.offset + plt_off3 + plt_off3_value_bias),
1682                       splt->contents + h->plt.offset + plt_off3);
1683
1684           /* Fill in the entry in the global offset table with the address of
1685              the relocating stub.  */
1686           bfd_put_32 (output_bfd,
1687                       (splt->output_section->vma
1688                        + splt->output_offset
1689                        + h->plt.offset
1690                        + plt_stub_offset),
1691                       sgotplt->contents + got_offset);
1692
1693           /* Fill in the entry in the .rela.plt section.  */
1694           rela.r_offset = (sgotplt->output_section->vma
1695                            + sgotplt->output_offset
1696                            + got_offset);
1697           rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
1698           rela.r_addend = 0;
1699           loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
1700           bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1701         }
1702
1703       if (!h->def_regular)
1704         {
1705           /* Mark the symbol as undefined, rather than as defined in
1706              the .plt section.  Leave the value alone.  */
1707           sym->st_shndx = SHN_UNDEF;
1708
1709           /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
1710              know whether resetting the value is significant; if it really
1711              is, rather than a quirk or bug in the sparc port, then I
1712              believe we'd see this elsewhere.  */
1713           /* If the symbol is weak, we do need to clear the value.
1714              Otherwise, the PLT entry would provide a definition for
1715              the symbol even if the symbol wasn't defined anywhere,
1716              and so the symbol would never be NULL.  */
1717           if (!h->ref_regular_nonweak)
1718             sym->st_value = 0;
1719         }
1720     }
1721
1722   /* For an ordinary program, we emit .got relocs only for symbols that
1723      are in the dynamic-symbols table and are either defined by the
1724      program or are undefined weak symbols, or are function symbols
1725      where we do not output a PLT: the PLT reloc was output above and all
1726      references to the function symbol are redirected to the PLT.  */
1727   if (h->got.offset != (bfd_vma) -1
1728       && (info->shared
1729           || (h->dynindx != -1
1730               && h->plt.offset == (bfd_vma) -1
1731               && !h->def_regular
1732               && h->root.type != bfd_link_hash_undefweak)))
1733     {
1734       asection *sgot;
1735       asection *srela;
1736       Elf_Internal_Rela rela;
1737       bfd_byte *loc;
1738       bfd_byte *where;
1739
1740       /* This symbol has an entry in the global offset table.  Set it up.  */
1741
1742       sgot = bfd_get_section_by_name (dynobj, ".got");
1743       srela = bfd_get_section_by_name (dynobj, ".rela.got");
1744       BFD_ASSERT (sgot != NULL && srela != NULL);
1745
1746       rela.r_offset = (sgot->output_section->vma
1747                        + sgot->output_offset
1748                        + (h->got.offset &~ (bfd_vma) 1));
1749
1750       /* If this is a static link, or it is a -Bsymbolic link and the
1751          symbol is defined locally or was forced to be local because
1752          of a version file, we just want to emit a RELATIVE reloc.
1753          The entry in the global offset table will already have been
1754          initialized in the relocate_section function.  */
1755       where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
1756       if (! elf_hash_table (info)->dynamic_sections_created
1757           || (info->shared
1758               && (info->symbolic || h->dynindx == -1)
1759               && h->def_regular))
1760         {
1761           rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1762           rela.r_addend = bfd_get_signed_32 (output_bfd, where);
1763         }
1764       else
1765         {
1766           bfd_put_32 (output_bfd, (bfd_vma) 0, where);
1767           rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
1768           rela.r_addend = 0;
1769         }
1770
1771       loc = srela->contents;
1772       loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1773       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1774     }
1775
1776   if (h->needs_copy)
1777     {
1778       asection *s;
1779       Elf_Internal_Rela rela;
1780       bfd_byte *loc;
1781
1782       /* This symbol needs a copy reloc.  Set it up.  */
1783
1784       BFD_ASSERT (h->dynindx != -1
1785                   && (h->root.type == bfd_link_hash_defined
1786                       || h->root.type == bfd_link_hash_defweak));
1787
1788       s = bfd_get_section_by_name (h->root.u.def.section->owner,
1789                                    ".rela.bss");
1790       BFD_ASSERT (s != NULL);
1791
1792       rela.r_offset = (h->root.u.def.value
1793                        + h->root.u.def.section->output_section->vma
1794                        + h->root.u.def.section->output_offset);
1795       rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
1796       rela.r_addend = 0;
1797       loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1798       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1799     }
1800
1801   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
1802   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1803       || h == elf_hash_table (info)->hgot)
1804     sym->st_shndx = SHN_ABS;
1805
1806   return TRUE;
1807 }
1808 \f
1809 /* Finish up the dynamic sections.  */
1810
1811 static bfd_boolean
1812 elf_cris_finish_dynamic_sections (output_bfd, info)
1813      bfd *output_bfd;
1814      struct bfd_link_info *info;
1815 {
1816   bfd *dynobj;
1817   asection *sgot;
1818   asection *sdyn;
1819
1820   dynobj = elf_hash_table (info)->dynobj;
1821
1822   sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1823   BFD_ASSERT (sgot != NULL);
1824   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1825
1826   if (elf_hash_table (info)->dynamic_sections_created)
1827     {
1828       asection *splt;
1829       Elf32_External_Dyn *dyncon, *dynconend;
1830
1831       splt = bfd_get_section_by_name (dynobj, ".plt");
1832       BFD_ASSERT (splt != NULL && sdyn != NULL);
1833
1834       dyncon = (Elf32_External_Dyn *) sdyn->contents;
1835       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1836       for (; dyncon < dynconend; dyncon++)
1837         {
1838           Elf_Internal_Dyn dyn;
1839           asection *s;
1840
1841           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1842
1843           switch (dyn.d_tag)
1844             {
1845             default:
1846               break;
1847
1848             case DT_PLTGOT:
1849               s = bfd_get_section_by_name (output_bfd, ".got");
1850               BFD_ASSERT (s != NULL);
1851               dyn.d_un.d_ptr = s->vma;
1852               bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1853               break;
1854
1855             case DT_JMPREL:
1856               /* Yes, we *can* have a .plt and no .plt.rela, for instance
1857                  if all symbols are found in the .got (not .got.plt).  */
1858               s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1859               dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
1860               bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1861               break;
1862
1863             case DT_PLTRELSZ:
1864               s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1865               if (s == NULL)
1866                 dyn.d_un.d_val = 0;
1867               else
1868                 dyn.d_un.d_val = s->size;
1869               bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1870               break;
1871
1872             case DT_RELASZ:
1873               /* The procedure linkage table relocs (DT_JMPREL) should
1874                  not be included in the overall relocs (DT_RELA).
1875                  Therefore, we override the DT_RELASZ entry here to
1876                  make it not include the JMPREL relocs.  Since the
1877                  linker script arranges for .rela.plt to follow all
1878                  other relocation sections, we don't have to worry
1879                  about changing the DT_RELA entry.  */
1880               s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1881               if (s != NULL)
1882                 dyn.d_un.d_val -= s->size;
1883               bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1884               break;
1885             }
1886         }
1887
1888       /* Fill in the first entry in the procedure linkage table.  */
1889       if (splt->size > 0)
1890         {
1891           if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1892             {
1893               if (info->shared)
1894                 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
1895                         PLT_ENTRY_SIZE_V32);
1896               else
1897                 {
1898                   memcpy (splt->contents, elf_cris_plt0_entry_v32,
1899                           PLT_ENTRY_SIZE_V32);
1900                   bfd_put_32 (output_bfd,
1901                               sgot->output_section->vma
1902                               + sgot->output_offset + 4,
1903                               splt->contents + 4);
1904
1905                   elf_section_data (splt->output_section)->this_hdr.sh_entsize
1906                     = PLT_ENTRY_SIZE_V32;
1907                 }
1908             }
1909           else
1910             {
1911               if (info->shared)
1912                 memcpy (splt->contents, elf_cris_pic_plt0_entry,
1913                         PLT_ENTRY_SIZE);
1914               else
1915                 {
1916                   memcpy (splt->contents, elf_cris_plt0_entry,
1917                           PLT_ENTRY_SIZE);
1918                   bfd_put_32 (output_bfd,
1919                               sgot->output_section->vma
1920                               + sgot->output_offset + 4,
1921                               splt->contents + 6);
1922                   bfd_put_32 (output_bfd,
1923                               sgot->output_section->vma
1924                               + sgot->output_offset + 8,
1925                               splt->contents + 14);
1926
1927                   elf_section_data (splt->output_section)->this_hdr.sh_entsize
1928                     = PLT_ENTRY_SIZE;
1929                 }
1930             }
1931         }
1932     }
1933
1934   /* Fill in the first three entries in the global offset table.  */
1935   if (sgot->size > 0)
1936     {
1937       if (sdyn == NULL)
1938         bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1939       else
1940         bfd_put_32 (output_bfd,
1941                     sdyn->output_section->vma + sdyn->output_offset,
1942                     sgot->contents);
1943       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1944       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1945     }
1946
1947   elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1948
1949   return TRUE;
1950 }
1951 \f
1952 /* Return the section that should be marked against GC for a given
1953    relocation.  */
1954
1955 static asection *
1956 cris_elf_gc_mark_hook (asection *sec,
1957                        struct bfd_link_info *info,
1958                        Elf_Internal_Rela *rel,
1959                        struct elf_link_hash_entry *h,
1960                        Elf_Internal_Sym *sym)
1961 {
1962   if (h != NULL)
1963     switch (ELF32_R_TYPE (rel->r_info))
1964       {
1965       case R_CRIS_GNU_VTINHERIT:
1966       case R_CRIS_GNU_VTENTRY:
1967         return NULL;
1968       }
1969
1970   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1971 }
1972
1973 /* Update the got entry reference counts for the section being removed.  */
1974
1975 static bfd_boolean
1976 cris_elf_gc_sweep_hook (bfd *abfd,
1977                         struct bfd_link_info *info,
1978                         asection *sec,
1979                         const Elf_Internal_Rela *relocs)
1980 {
1981   Elf_Internal_Shdr *symtab_hdr;
1982   struct elf_link_hash_entry **sym_hashes;
1983   bfd_signed_vma *local_got_refcounts;
1984   const Elf_Internal_Rela *rel, *relend;
1985   bfd *dynobj;
1986   asection *sgot;
1987   asection *srelgot;
1988
1989   dynobj = elf_hash_table (info)->dynobj;
1990   if (dynobj == NULL)
1991     return TRUE;
1992
1993   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1994   sym_hashes = elf_sym_hashes (abfd);
1995   local_got_refcounts = elf_local_got_refcounts (abfd);
1996
1997   sgot = bfd_get_section_by_name (dynobj, ".got");
1998   srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1999
2000   relend = relocs + sec->reloc_count;
2001   for (rel = relocs; rel < relend; rel++)
2002     {
2003       unsigned long r_symndx;
2004       struct elf_link_hash_entry *h = NULL;
2005
2006       r_symndx = ELF32_R_SYM (rel->r_info);
2007       if (r_symndx >= symtab_hdr->sh_info)
2008         {
2009           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2010           while (h->root.type == bfd_link_hash_indirect
2011                  || h->root.type == bfd_link_hash_warning)
2012             h = (struct elf_link_hash_entry *) h->root.u.i.link;
2013         }
2014
2015       switch (ELF32_R_TYPE (rel->r_info))
2016         {
2017         case R_CRIS_16_GOT:
2018         case R_CRIS_32_GOT:
2019           if (h != NULL)
2020             {
2021               if (h->got.refcount > 0)
2022                 {
2023                   --h->got.refcount;
2024                   if (h->got.refcount == 0)
2025                     {
2026                       /* We don't need the .got entry any more.  */
2027                       sgot->size -= 4;
2028                       srelgot->size -= sizeof (Elf32_External_Rela);
2029                     }
2030                 }
2031               break;
2032             }
2033
2034         local_got_reloc:
2035           if (local_got_refcounts != NULL)
2036             {
2037               if (local_got_refcounts[r_symndx] > 0)
2038                 {
2039                   --local_got_refcounts[r_symndx];
2040                   if (local_got_refcounts[r_symndx] == 0)
2041                     {
2042                       /* We don't need the .got entry any more.  */
2043                       sgot->size -= 4;
2044                       if (info->shared)
2045                         srelgot->size -= sizeof (Elf32_External_Rela);
2046                     }
2047                 }
2048             }
2049           break;
2050
2051         case R_CRIS_16_GOTPLT:
2052         case R_CRIS_32_GOTPLT:
2053           /* For local symbols, treat these like GOT relocs.  */
2054           if (h == NULL)
2055             goto local_got_reloc;
2056           /* Fall through.  */
2057
2058         case R_CRIS_32_PLT_GOTREL:
2059           /* FIXME: We don't garbage-collect away the .got section.  */
2060           if (local_got_refcounts != NULL)
2061             local_got_refcounts[-1]--;
2062           /* Fall through.  */
2063
2064         case R_CRIS_8_PCREL:
2065         case R_CRIS_16_PCREL:
2066         case R_CRIS_32_PCREL:
2067         case R_CRIS_32_PLT_PCREL:
2068           if (h != NULL)
2069             {
2070               if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2071                   && h->plt.refcount > 0)
2072                 --h->plt.refcount;
2073             }
2074           break;
2075
2076         default:
2077           break;
2078         }
2079     }
2080
2081   return TRUE;
2082 }
2083
2084 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2085    entry but we found we will not create any.  Called when we find we will
2086    not have any PLT for this symbol, by for example
2087    elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2088    or elf_cris_size_dynamic_sections if no dynamic sections will be
2089    created (we're only linking static objects).  */
2090
2091 static bfd_boolean
2092 elf_cris_adjust_gotplt_to_got (h, p)
2093      struct elf_cris_link_hash_entry *h;
2094      PTR p;
2095 {
2096   struct bfd_link_info *info = (struct bfd_link_info *) p;
2097
2098   if (h->root.root.type == bfd_link_hash_warning)
2099     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2100
2101   /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2102   if (h->gotplt_refcount <= 0)
2103     return TRUE;
2104
2105   if (h->root.got.refcount > 0)
2106     {
2107       /* There's a GOT entry for this symbol.  Just adjust the refcount.
2108          Probably not necessary at this stage, but keeping it accurate
2109          helps avoiding surprises later.  */
2110       h->root.got.refcount += h->gotplt_refcount;
2111       h->gotplt_refcount = 0;
2112     }
2113   else
2114     {
2115       /* No GOT entry for this symbol.  We need to create one.  */
2116       bfd *dynobj = elf_hash_table (info)->dynobj;
2117       asection *sgot;
2118       asection *srelgot;
2119
2120       BFD_ASSERT (dynobj != NULL);
2121       sgot = bfd_get_section_by_name (dynobj, ".got");
2122       srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2123
2124       /* Put an accurate refcount there.  */
2125       h->root.got.refcount = h->gotplt_refcount;
2126
2127       h->gotplt_refcount = 0;
2128
2129       /* We always have a .got and a .rela.got section if there were
2130          GOTPLT relocs in input.  */
2131       BFD_ASSERT (sgot != NULL && srelgot != NULL);
2132
2133       /* Allocate space in the .got section.  */
2134       sgot->size += 4;
2135
2136       /* Allocate relocation space.  */
2137       srelgot->size += sizeof (Elf32_External_Rela);
2138     }
2139
2140   return TRUE;
2141 }
2142
2143 /* Try to fold PLT entries with GOT entries.  There are two cases when we
2144    want to do this:
2145
2146    - When all PLT references are GOTPLT references, and there are GOT
2147      references, and this is not the executable.  We don't have to
2148      generate a PLT at all.
2149
2150    - When there are both (ordinary) PLT references and GOT references,
2151      and this isn't the executable.
2152      We want to make the PLT reference use the ordinary GOT entry rather
2153      than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2154      since the GOT entry will have to be resolved at startup anyway.
2155
2156    Though the latter case is handled when room for the PLT is allocated,
2157    not here.
2158
2159    By folding into the GOT, we may need a round-trip to a PLT in the
2160    executable for calls, a loss in performance.  Still, losing a
2161    reloc is a win in size and at least in start-up time.
2162
2163    Note that this function is called before symbols are forced local by
2164    version scripts.  The differing cases are handled by
2165    elf_cris_hide_symbol.  */
2166
2167 static bfd_boolean
2168 elf_cris_try_fold_plt_to_got (h, p)
2169      struct elf_cris_link_hash_entry *h;
2170      PTR p;
2171 {
2172   struct bfd_link_info *info = (struct bfd_link_info *) p;
2173
2174   /* If there are no GOT references for this symbol, we can't fold any
2175      other reference so there's nothing to do.  Likewise if there are no
2176      PLT references; GOTPLT references included.  */
2177   if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2178     return TRUE;
2179
2180   /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2181   BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2182
2183   if (h->gotplt_refcount == h->root.plt.refcount)
2184     {
2185       /* The only PLT references are GOTPLT references, and there are GOT
2186          references.  Convert PLT to GOT references.  */
2187       if (! elf_cris_adjust_gotplt_to_got (h, info))
2188         return FALSE;
2189
2190       /* Clear the PLT references, so no PLT will be created.  */
2191       h->root.plt.offset = (bfd_vma) -1;
2192     }
2193
2194   return TRUE;
2195 }
2196
2197 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2198    to use a GOT entry (and create one) rather than requiring a GOTPLT
2199    entry.  */
2200
2201 static void
2202 elf_cris_hide_symbol (info, h, force_local)
2203      struct bfd_link_info *info;
2204      struct elf_link_hash_entry *h;
2205      bfd_boolean force_local;
2206 {
2207   elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2208
2209   _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2210 }
2211
2212 /* Adjust a symbol defined by a dynamic object and referenced by a
2213    regular object.  The current definition is in some section of the
2214    dynamic object, but we're not including those sections.  We have to
2215    change the definition to something the rest of the link can
2216    understand.  */
2217
2218 static bfd_boolean
2219 elf_cris_adjust_dynamic_symbol (info, h)
2220      struct bfd_link_info *info;
2221      struct elf_link_hash_entry *h;
2222 {
2223   bfd *dynobj;
2224   asection *s;
2225   bfd_size_type plt_entry_size;
2226
2227   dynobj = elf_hash_table (info)->dynobj;
2228
2229   /* Make sure we know what is going on here.  */
2230   BFD_ASSERT (dynobj != NULL
2231               && (h->needs_plt
2232                   || h->u.weakdef != NULL
2233                   || (h->def_dynamic
2234                       && h->ref_regular
2235                       && !h->def_regular)));
2236
2237   plt_entry_size
2238     = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2239        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2240
2241   /* If this is a function, put it in the procedure linkage table.  We
2242      will fill in the contents of the procedure linkage table later,
2243      when we know the address of the .got section.  */
2244   if (h->type == STT_FUNC
2245       || h->needs_plt)
2246     {
2247       /* If we link a program (not a DSO), we'll get rid of unnecessary
2248          PLT entries; we point to the actual symbols -- even for pic
2249          relocs, because a program built with -fpic should have the same
2250          result as one built without -fpic, specifically considering weak
2251          symbols.
2252          FIXME: m68k and i386 differ here, for unclear reasons.  */
2253       if (! info->shared
2254           && !h->def_dynamic)
2255         {
2256           /* This case can occur if we saw a PLT reloc in an input file,
2257              but the symbol was not defined by a dynamic object.  In such
2258              a case, we don't actually need to build a procedure linkage
2259              table, and we can just do an absolute or PC reloc instead, or
2260              change a .got.plt index to a .got index for GOTPLT relocs.  */
2261           BFD_ASSERT (h->needs_plt);
2262           h->needs_plt = 0;
2263           h->plt.offset = (bfd_vma) -1;
2264           return
2265             elf_cris_adjust_gotplt_to_got ((struct
2266                                             elf_cris_link_hash_entry *) h,
2267                                            info);
2268         }
2269
2270       /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2271          where a pointer-equivalent symbol was unimportant (i.e. more
2272          like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2273          of the PLT.  We can't for the executable, because the GOT
2274          entries will point to the PLT there (and be constant).  */
2275       if (info->shared
2276           && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2277                                             h, info))
2278         return FALSE;
2279
2280       /* GC or folding may have rendered this entry unused.  */
2281       if (h->plt.refcount <= 0)
2282         {
2283           h->needs_plt = 0;
2284           h->plt.offset = (bfd_vma) -1;
2285           return TRUE;
2286         }
2287
2288       /* Make sure this symbol is output as a dynamic symbol.  */
2289       if (h->dynindx == -1)
2290         {
2291           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2292             return FALSE;
2293         }
2294
2295       s = bfd_get_section_by_name (dynobj, ".plt");
2296       BFD_ASSERT (s != NULL);
2297
2298       /* If this is the first .plt entry, make room for the special
2299          first entry.  */
2300       if (s->size == 0)
2301         s->size += plt_entry_size;
2302
2303       /* If this symbol is not defined in a regular file, and we are
2304          not generating a shared library, then set the symbol to this
2305          location in the .plt.  */
2306       if (!info->shared
2307           && !h->def_regular)
2308         {
2309           h->root.u.def.section = s;
2310           h->root.u.def.value = s->size;
2311         }
2312
2313       /* If there's already a GOT entry, use that, not a .got.plt.  A
2314          GOT field still has a reference count when we get here; it's
2315          not yet changed to an offset.  We can't do this for an
2316          executable, because then the reloc associated with the PLT
2317          would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2318          this to elf_cris_try_fold_plt_to_got.  */
2319       if (info->shared && h->got.refcount > 0)
2320         {
2321           h->got.refcount += h->plt.refcount;
2322
2323           /* Mark the PLT offset to use the GOT entry by setting the low
2324              bit in the plt offset; it is always a multiple of
2325              plt_entry_size (which is at least a multiple of 2).  */
2326           BFD_ASSERT ((s->size % plt_entry_size) == 0);
2327
2328           /* Change the PLT refcount to an offset.  */
2329           h->plt.offset = s->size;
2330
2331           /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2332              that the got entry should be used instead.  */
2333           BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2334                        h)->gotplt_offset == 0);
2335
2336           /* Make room for this entry.  */
2337           s->size += plt_entry_size;
2338
2339           return TRUE;
2340         }
2341
2342       /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2343       h->plt.offset = s->size;
2344
2345       /* Make room for this entry.  */
2346       s->size += plt_entry_size;
2347
2348       /* We also need to make an entry in the .got.plt section, which
2349          will be placed in the .got section by the linker script.  */
2350       ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2351         = elf_cris_hash_table (info)->next_gotplt_entry;
2352       elf_cris_hash_table (info)->next_gotplt_entry += 4;
2353
2354       s = bfd_get_section_by_name (dynobj, ".got.plt");
2355       BFD_ASSERT (s != NULL);
2356       s->size += 4;
2357
2358       /* We also need to make an entry in the .rela.plt section.  */
2359
2360       s = bfd_get_section_by_name (dynobj, ".rela.plt");
2361       BFD_ASSERT (s != NULL);
2362       s->size += sizeof (Elf32_External_Rela);
2363
2364       return TRUE;
2365     }
2366
2367   /* Reinitialize the plt offset now that it is not used as a reference
2368      count any more.  */
2369   h->plt.offset = (bfd_vma) -1;
2370
2371   /* If this is a weak symbol, and there is a real definition, the
2372      processor independent code will have arranged for us to see the
2373      real definition first, and we can just use the same value.  */
2374   if (h->u.weakdef != NULL)
2375     {
2376       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2377                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
2378       h->root.u.def.section = h->u.weakdef->root.u.def.section;
2379       h->root.u.def.value = h->u.weakdef->root.u.def.value;
2380       return TRUE;
2381     }
2382
2383   /* This is a reference to a symbol defined by a dynamic object which
2384      is not a function.  */
2385
2386   /* If we are creating a shared library, we must presume that the
2387      only references to the symbol are via the global offset table.
2388      For such cases we need not do anything here; the relocations will
2389      be handled correctly by relocate_section.  */
2390   if (info->shared)
2391     return TRUE;
2392
2393   /* If there are no references to this symbol that do not use the
2394      GOT, we don't need to generate a copy reloc.  */
2395   if (!h->non_got_ref)
2396     return TRUE;
2397
2398   if (h->size == 0)
2399     {
2400       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2401                              h->root.root.string);
2402       return TRUE;
2403     }
2404
2405   /* We must allocate the symbol in our .dynbss section, which will
2406      become part of the .bss section of the executable.  There will be
2407      an entry for this symbol in the .dynsym section.  The dynamic
2408      object will contain position independent code, so all references
2409      from the dynamic object to this symbol will go through the global
2410      offset table.  The dynamic linker will use the .dynsym entry to
2411      determine the address it must put in the global offset table, so
2412      both the dynamic object and the regular object will refer to the
2413      same memory location for the variable.  */
2414
2415   s = bfd_get_section_by_name (dynobj, ".dynbss");
2416   BFD_ASSERT (s != NULL);
2417
2418   /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2419      copy the initial value out of the dynamic object and into the
2420      runtime process image.  We need to remember the offset into the
2421      .rela.bss section we are going to use.  */
2422   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2423     {
2424       asection *srel;
2425
2426       srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2427       BFD_ASSERT (srel != NULL);
2428       srel->size += sizeof (Elf32_External_Rela);
2429       h->needs_copy = 1;
2430     }
2431
2432   return _bfd_elf_adjust_dynamic_copy (h, s);
2433 }
2434
2435 /* Look through the relocs for a section during the first phase.  */
2436
2437 static bfd_boolean
2438 cris_elf_check_relocs (abfd, info, sec, relocs)
2439      bfd *abfd;
2440      struct bfd_link_info *info;
2441      asection *sec;
2442      const Elf_Internal_Rela *relocs;
2443 {
2444   bfd *dynobj;
2445   Elf_Internal_Shdr *symtab_hdr;
2446   struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2447   bfd_signed_vma *local_got_refcounts;
2448   const Elf_Internal_Rela *rel;
2449   const Elf_Internal_Rela *rel_end;
2450   asection *sgot;
2451   asection *srelgot;
2452   asection *sreloc;
2453
2454   if (info->relocatable)
2455     return TRUE;
2456
2457   dynobj = elf_hash_table (info)->dynobj;
2458   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2459   sym_hashes = elf_sym_hashes (abfd);
2460   sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
2461   local_got_refcounts = elf_local_got_refcounts (abfd);
2462
2463   sgot = NULL;
2464   srelgot = NULL;
2465   sreloc = NULL;
2466
2467   if (!elf_bad_symtab (abfd))
2468     sym_hashes_end -= symtab_hdr->sh_info;
2469
2470   rel_end = relocs + sec->reloc_count;
2471   for (rel = relocs; rel < rel_end; rel++)
2472     {
2473       struct elf_link_hash_entry *h;
2474       unsigned long r_symndx;
2475       enum elf_cris_reloc_type r_type;
2476
2477       r_symndx = ELF32_R_SYM (rel->r_info);
2478       if (r_symndx < symtab_hdr->sh_info)
2479         h = NULL;
2480       else
2481         {
2482           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2483           while (h->root.type == bfd_link_hash_indirect
2484                  || h->root.type == bfd_link_hash_warning)
2485             h = (struct elf_link_hash_entry *) h->root.u.i.link;
2486         }
2487
2488       r_type = ELF32_R_TYPE (rel->r_info);
2489
2490       /* Some relocs require linker-created sections; we need to hang them
2491          on the first input bfd we found that contained dynamic relocs.  */
2492       switch (r_type)
2493         {
2494         case R_CRIS_16_GOT:
2495         case R_CRIS_32_GOT:
2496         case R_CRIS_32_GOTREL:
2497         case R_CRIS_32_PLT_GOTREL:
2498         case R_CRIS_32_PLT_PCREL:
2499         case R_CRIS_16_GOTPLT:
2500         case R_CRIS_32_GOTPLT:
2501           if (dynobj == NULL)
2502             {
2503               elf_hash_table (info)->dynobj = dynobj = abfd;
2504
2505               /* We could handle this if we can get a handle on the
2506                  output bfd in elf_cris_adjust_dynamic_symbol.  Failing
2507                  that, we must insist on dynobj being a specific mach.  */
2508               if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
2509                 {
2510                   (*_bfd_error_handler)
2511                     (_("%B, section %A:\n  v10/v32 compatible object %s"
2512                        " must not contain a PIC relocation"),
2513                      abfd, sec);
2514                   return FALSE;
2515                 }
2516
2517               /* Create the .got section, so we can assume it's always
2518                  present whenever there's a dynobj.  */
2519               if (!_bfd_elf_create_got_section (dynobj, info))
2520                 return FALSE;
2521             }
2522           break;
2523
2524         default:
2525           break;
2526         }
2527
2528       /* Some relocs require a global offset table (but perhaps not a
2529          specific GOT entry).  */
2530       switch (r_type)
2531         {
2532           /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2533              entry only for local symbols.  Unfortunately, we don't know
2534              until later on if there's a version script that forces the
2535              symbol local.  We must have the .rela.got section in place
2536              before we know if the symbol looks global now, so we need
2537              to treat the reloc just like for R_CRIS_16_GOT and
2538              R_CRIS_32_GOT.  */
2539         case R_CRIS_16_GOTPLT:
2540         case R_CRIS_32_GOTPLT:
2541         case R_CRIS_16_GOT:
2542         case R_CRIS_32_GOT:
2543           if (srelgot == NULL
2544               && (h != NULL || info->shared))
2545             {
2546               srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2547               if (srelgot == NULL)
2548                 {
2549                   srelgot = bfd_make_section_with_flags (dynobj,
2550                                                          ".rela.got",
2551                                                          (SEC_ALLOC
2552                                                           | SEC_LOAD
2553                                                           | SEC_HAS_CONTENTS
2554                                                           | SEC_IN_MEMORY
2555                                                           | SEC_LINKER_CREATED
2556                                                           | SEC_READONLY));
2557                   if (srelgot == NULL
2558                       || !bfd_set_section_alignment (dynobj, srelgot, 2))
2559                     return FALSE;
2560                 }
2561             }
2562           /* Fall through.  */
2563
2564         case R_CRIS_32_GOTREL:
2565         case R_CRIS_32_PLT_GOTREL:
2566           if (sgot == NULL)
2567             sgot = bfd_get_section_by_name (dynobj, ".got");
2568
2569           if (local_got_refcounts == NULL)
2570             {
2571               bfd_size_type amt;
2572
2573               /* We use index local_got_refcounts[-1] to count all
2574                  GOT-relative relocations that do not have explicit
2575                  GOT entries.  */
2576               amt = symtab_hdr->sh_info + 1;
2577               amt *= sizeof (bfd_signed_vma);
2578               local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
2579               if (local_got_refcounts == NULL)
2580                 return FALSE;
2581
2582               local_got_refcounts++;
2583               elf_local_got_refcounts (abfd) = local_got_refcounts;
2584             }
2585           break;
2586
2587         default:
2588           break;
2589         }
2590
2591       switch (r_type)
2592         {
2593         case R_CRIS_16_GOTPLT:
2594         case R_CRIS_32_GOTPLT:
2595           /* Mark that we need a GOT entry if the PLT entry (and its GOT
2596              entry) is eliminated.  We can only do this for a non-local
2597              symbol.  */
2598           if (h != NULL)
2599             {
2600               ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++;
2601               goto handle_gotplt_reloc;
2602             }
2603           /* If h is NULL then this is a local symbol, and we must make a
2604              GOT entry for it, so handle it like a GOT reloc.  */
2605           /* Fall through.  */
2606
2607         case R_CRIS_16_GOT:
2608         case R_CRIS_32_GOT:
2609           /* This symbol requires a global offset table entry.  */
2610           if (h != NULL)
2611             {
2612               if (h->got.refcount == 0)
2613                 {
2614                   /* Make sure this symbol is output as a dynamic symbol.  */
2615                   if (h->dynindx == -1)
2616                     {
2617                       if (!bfd_elf_link_record_dynamic_symbol (info, h))
2618                         return FALSE;
2619                     }
2620
2621                   /* Allocate space in the .got section.  */
2622                   sgot->size += 4;
2623                   /* Allocate relocation space.  */
2624                   srelgot->size += sizeof (Elf32_External_Rela);
2625                 }
2626               h->got.refcount++;
2627             }
2628           else
2629             {
2630               /* This is a global offset table entry for a local symbol.  */
2631               if (local_got_refcounts[r_symndx] == 0)
2632                 {
2633                   sgot->size += 4;
2634                   if (info->shared)
2635                     {
2636                       /* If we are generating a shared object, we need to
2637                          output a R_CRIS_RELATIVE reloc so that the dynamic
2638                          linker can adjust this GOT entry.  */
2639                       srelgot->size += sizeof (Elf32_External_Rela);
2640                     }
2641                 }
2642               local_got_refcounts[r_symndx]++;
2643             }
2644           break;
2645
2646         case R_CRIS_32_GOTREL:
2647           /* This reference requires a global offset table.
2648              FIXME: The actual refcount isn't used currently; the .got
2649              section can't be removed if there were any references in the
2650              input.  */
2651           local_got_refcounts[-1]++;
2652           break;
2653
2654         handle_gotplt_reloc:
2655
2656         case R_CRIS_32_PLT_GOTREL:
2657           /* This reference requires a global offset table.  */
2658           local_got_refcounts[-1]++;
2659           /* Fall through.  */
2660
2661         case R_CRIS_32_PLT_PCREL:
2662           /* This symbol requires a procedure linkage table entry.  We
2663              actually build the entry in adjust_dynamic_symbol,
2664              because this might be a case of linking PIC code which is
2665              never referenced by a dynamic object, in which case we
2666              don't need to generate a procedure linkage table entry
2667              after all.  */
2668
2669           /* Beware: if we'd check for visibility of the symbol here
2670              (and not marking the need for a PLT when non-visible), we'd
2671              get into trouble with keeping handling consistent with
2672              regards to relocs found before definition and GOTPLT
2673              handling.  Eliminable PLT entries will be dealt with later
2674              anyway.  */
2675           if (h == NULL)
2676             continue;
2677
2678           h->needs_plt = 1;
2679           h->plt.refcount++;
2680           break;
2681
2682         case R_CRIS_8:
2683         case R_CRIS_16:
2684         case R_CRIS_32:
2685           /* Let's help debug shared library creation.  Any of these
2686              relocs can be used in shared libs, but pages containing them
2687              cannot be shared.  Don't warn for sections we don't care
2688              about, such as debug sections or non-constant sections.  We
2689              can't help tables of (global) function pointers, for example,
2690              though they must be emitted in a data section to avoid having
2691              impure text sections.  */
2692           if (info->shared
2693               && (sec->flags & SEC_ALLOC) != 0
2694               && (sec->flags & SEC_READONLY) != 0)
2695             {
2696               /* FIXME: How do we make this optionally a warning only?  */
2697               (*_bfd_error_handler)
2698                 (_("%B, section %A:\n  relocation %s should not"
2699                    " be used in a shared object; recompile with -fPIC"),
2700                  abfd,
2701                  sec,
2702                  cris_elf_howto_table[r_type].name);
2703             }
2704           /* Fall through.  */
2705
2706         case R_CRIS_8_PCREL:
2707         case R_CRIS_16_PCREL:
2708         case R_CRIS_32_PCREL:
2709           if (h != NULL)
2710             {
2711               h->non_got_ref = 1;
2712
2713               /* Make sure a plt entry is created for this symbol if it
2714                  turns out to be a function defined by a dynamic object.  */
2715               if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2716                 h->plt.refcount++;
2717             }
2718
2719           /* If we are creating a shared library and this is not a local
2720              symbol, we need to copy the reloc into the shared library.
2721              However when linking with -Bsymbolic and this is a global
2722              symbol which is defined in an object we are including in the
2723              link (i.e., DEF_REGULAR is set), then we can resolve the
2724              reloc directly.  At this point we have not seen all the input
2725              files, so it is possible that DEF_REGULAR is not set now but
2726              will be set later (it is never cleared).  In case of a weak
2727              definition, DEF_REGULAR may be cleared later by a strong
2728              definition in a shared library.  We account for that
2729              possibility below by storing information in the relocs_copied
2730              field of the hash table entry.  A similar situation occurs
2731              when creating shared libraries and symbol visibility changes
2732              render the symbol local.  */
2733
2734           /* No need to do anything if we're not creating a shared object.  */
2735           if (! info->shared)
2736             break;
2737
2738           /* We don't need to handle relocs into sections not going into
2739              the "real" output.  */
2740           if ((sec->flags & SEC_ALLOC) == 0)
2741             break;
2742
2743           /* We can only eliminate PC-relative relocs.  */
2744           if (r_type == R_CRIS_8_PCREL
2745               || r_type == R_CRIS_16_PCREL
2746               || r_type == R_CRIS_32_PCREL)
2747             {
2748               /* If the symbol is local, then we can eliminate the reloc.  */
2749               if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2750                 break;
2751
2752               /* If this is with -Bsymbolic and the symbol isn't weak, and
2753                  is defined by an ordinary object (the ones we include in
2754                  this shared library) then we can also eliminate the
2755                  reloc.  See comment above for more eliminable cases which
2756                  we can't identify at this time.  */
2757               if (info->symbolic
2758                   && h->root.type != bfd_link_hash_defweak
2759                   && h->def_regular)
2760                 break;
2761
2762               if ((sec->flags & SEC_READONLY) != 0)
2763                 {
2764                   /* FIXME: How do we make this optionally a warning only?  */
2765                   (*_bfd_error_handler)
2766                     (_("%B, section %A:\n  relocation %s should not be used"
2767                        " in a shared object; recompile with -fPIC"),
2768                      abfd,
2769                      sec,
2770                      cris_elf_howto_table[r_type].name);
2771                 }
2772             }
2773
2774           /* We create a reloc section in dynobj and make room for this
2775              reloc.  */
2776           if (sreloc == NULL)
2777             {
2778               const char *name;
2779
2780               name = (bfd_elf_string_from_elf_section
2781                       (abfd,
2782                        elf_elfheader (abfd)->e_shstrndx,
2783                        elf_section_data (sec)->rel_hdr.sh_name));
2784               if (name == NULL)
2785                 return FALSE;
2786
2787               BFD_ASSERT (CONST_STRNEQ (name, ".rela")
2788                           && strcmp (bfd_get_section_name (abfd, sec),
2789                                      name + 5) == 0);
2790
2791               sreloc = bfd_get_section_by_name (dynobj, name);
2792               if (sreloc == NULL)
2793                 {
2794                   sreloc = bfd_make_section_with_flags (dynobj, name,
2795                                                         (SEC_ALLOC
2796                                                          | SEC_LOAD
2797                                                          | SEC_HAS_CONTENTS
2798                                                          | SEC_IN_MEMORY
2799                                                          | SEC_LINKER_CREATED
2800                                                          | SEC_READONLY));
2801                   if (sreloc == NULL
2802                       || !bfd_set_section_alignment (dynobj, sreloc, 2))
2803                     return FALSE;
2804                 }
2805               if (sec->flags & SEC_READONLY)
2806                 info->flags |= DF_TEXTREL;
2807             }
2808
2809           sreloc->size += sizeof (Elf32_External_Rela);
2810
2811           /* If we are linking with -Bsymbolic, we count the number of PC
2812              relative relocations we have entered for this symbol, so that
2813              we can discard them again if the symbol is later defined by a
2814              regular object.  We know that h is really a pointer to an
2815              elf_cris_link_hash_entry.  */
2816           if ((r_type == R_CRIS_8_PCREL
2817                || r_type == R_CRIS_16_PCREL
2818                || r_type == R_CRIS_32_PCREL)
2819               && info->symbolic)
2820             {
2821               struct elf_cris_link_hash_entry *eh;
2822               struct elf_cris_pcrel_relocs_copied *p;
2823
2824               eh = (struct elf_cris_link_hash_entry *) h;
2825
2826               for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2827                 if (p->section == sreloc)
2828                   break;
2829
2830               if (p == NULL)
2831                 {
2832                   p = ((struct elf_cris_pcrel_relocs_copied *)
2833                        bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2834                   if (p == NULL)
2835                     return FALSE;
2836                   p->next = eh->pcrel_relocs_copied;
2837                   eh->pcrel_relocs_copied = p;
2838                   p->section = sreloc;
2839                   p->count = 0;
2840                 }
2841
2842               ++p->count;
2843             }
2844           break;
2845
2846         /* This relocation describes the C++ object vtable hierarchy.
2847            Reconstruct it for later use during GC.  */
2848         case R_CRIS_GNU_VTINHERIT:
2849           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2850             return FALSE;
2851           break;
2852
2853         /* This relocation describes which C++ vtable entries are actually
2854            used.  Record for later use during GC.  */
2855         case R_CRIS_GNU_VTENTRY:
2856           if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2857             return FALSE;
2858           break;
2859
2860         default:
2861           /* Other relocs do not appear here.  */
2862           bfd_set_error (bfd_error_bad_value);
2863           return FALSE;
2864         }
2865     }
2866
2867   return TRUE;
2868 }
2869
2870 /* Set the sizes of the dynamic sections.  */
2871
2872 static bfd_boolean
2873 elf_cris_size_dynamic_sections (output_bfd, info)
2874      bfd *output_bfd ATTRIBUTE_UNUSED;
2875      struct bfd_link_info *info;
2876 {
2877   bfd *dynobj;
2878   asection *s;
2879   bfd_boolean plt;
2880   bfd_boolean relocs;
2881
2882   dynobj = elf_hash_table (info)->dynobj;
2883   BFD_ASSERT (dynobj != NULL);
2884
2885   if (elf_hash_table (info)->dynamic_sections_created)
2886     {
2887       /* Set the contents of the .interp section to the interpreter.  */
2888       if (info->executable)
2889         {
2890           s = bfd_get_section_by_name (dynobj, ".interp");
2891           BFD_ASSERT (s != NULL);
2892           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2893           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2894         }
2895     }
2896   else
2897     {
2898       /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
2899       elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2900                                    elf_cris_adjust_gotplt_to_got,
2901                                    (PTR) info);
2902
2903       /* We may have created entries in the .rela.got section.
2904          However, if we are not creating the dynamic sections, we will
2905          not actually use these entries.  Reset the size of .rela.got,
2906          which will cause it to get stripped from the output file
2907          below.  */
2908       s = bfd_get_section_by_name (dynobj, ".rela.got");
2909       if (s != NULL)
2910         s->size = 0;
2911     }
2912
2913   /* If this is a -Bsymbolic shared link, then we need to discard all PC
2914      relative relocs against symbols defined in a regular object.  We
2915      allocated space for them in the check_relocs routine, but we will not
2916      fill them in in the relocate_section routine.  We also discard space
2917      for relocs that have become for local symbols due to symbol
2918      visibility changes.  For programs, we discard space for relocs for
2919      symbols not referenced by any dynamic object.  */
2920   if (info->shared)
2921     elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2922                                  elf_cris_discard_excess_dso_dynamics,
2923                                  (PTR) info);
2924   else
2925     elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2926                                  elf_cris_discard_excess_program_dynamics,
2927                                  (PTR) info);
2928
2929   /* The check_relocs and adjust_dynamic_symbol entry points have
2930      determined the sizes of the various dynamic sections.  Allocate
2931      memory for them.  */
2932   plt = FALSE;
2933   relocs = FALSE;
2934   for (s = dynobj->sections; s != NULL; s = s->next)
2935     {
2936       const char *name;
2937
2938       if ((s->flags & SEC_LINKER_CREATED) == 0)
2939         continue;
2940
2941       /* It's OK to base decisions on the section name, because none
2942          of the dynobj section names depend upon the input files.  */
2943       name = bfd_get_section_name (dynobj, s);
2944
2945       if (strcmp (name, ".plt") == 0)
2946         {
2947           /* Remember whether there is a PLT.  */
2948           plt = s->size != 0;
2949         }
2950       else if (CONST_STRNEQ (name, ".rela"))
2951         {
2952           if (s->size != 0)
2953             {
2954               /* Remember whether there are any reloc sections other
2955                  than .rela.plt.  */
2956               if (strcmp (name, ".rela.plt") != 0)
2957                   relocs = TRUE;
2958
2959               /* We use the reloc_count field as a counter if we need
2960                  to copy relocs into the output file.  */
2961               s->reloc_count = 0;
2962             }
2963         }
2964       else if (! CONST_STRNEQ (name, ".got")
2965                && strcmp (name, ".dynbss") != 0)
2966         {
2967           /* It's not one of our sections, so don't allocate space.  */
2968           continue;
2969         }
2970
2971       if (s->size == 0)
2972         {
2973           /* If we don't need this section, strip it from the
2974              output file.  This is mostly to handle .rela.bss and
2975              .rela.plt.  We must create both sections in
2976              create_dynamic_sections, because they must be created
2977              before the linker maps input sections to output
2978              sections.  The linker does that before
2979              adjust_dynamic_symbol is called, and it is that
2980              function which decides whether anything needs to go
2981              into these sections.  */
2982           s->flags |= SEC_EXCLUDE;
2983           continue;
2984         }
2985
2986       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2987         continue;
2988
2989       /* Allocate memory for the section contents. We use bfd_zalloc here
2990          in case unused entries are not reclaimed before the section's
2991          contents are written out.  This should not happen, but this way
2992          if it does, we will not write out garbage.  For reloc sections,
2993          this will make entries have the type R_CRIS_NONE.  */
2994       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2995       if (s->contents == NULL)
2996         return FALSE;
2997     }
2998
2999   if (elf_hash_table (info)->dynamic_sections_created)
3000     {
3001       /* Add some entries to the .dynamic section.  We fill in the
3002          values later, in elf_cris_finish_dynamic_sections, but we
3003          must add the entries now so that we get the correct size for
3004          the .dynamic section.  The DT_DEBUG entry is filled in by the
3005          dynamic linker and used by the debugger.  */
3006 #define add_dynamic_entry(TAG, VAL) \
3007   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3008
3009       if (!info->shared)
3010         {
3011           if (!add_dynamic_entry (DT_DEBUG, 0))
3012             return FALSE;
3013         }
3014
3015       if (plt)
3016         {
3017           if (!add_dynamic_entry (DT_PLTGOT, 0)
3018               || !add_dynamic_entry (DT_PLTRELSZ, 0)
3019               || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3020               || !add_dynamic_entry (DT_JMPREL, 0))
3021             return FALSE;
3022         }
3023
3024       if (relocs)
3025         {
3026           if (!add_dynamic_entry (DT_RELA, 0)
3027               || !add_dynamic_entry (DT_RELASZ, 0)
3028               || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3029             return FALSE;
3030         }
3031
3032       if ((info->flags & DF_TEXTREL) != 0)
3033         {
3034           if (!add_dynamic_entry (DT_TEXTREL, 0))
3035             return FALSE;
3036           info->flags |= DF_TEXTREL;
3037         }
3038     }
3039 #undef add_dynamic_entry
3040
3041   return TRUE;
3042 }
3043
3044 /* This function is called via elf_cris_link_hash_traverse if we are
3045    creating a shared object.  In the -Bsymbolic case, it discards the
3046    space allocated to copy PC relative relocs against symbols which
3047    are defined in regular objects.  For the normal non-symbolic case,
3048    we also discard space for relocs that have become local due to
3049    symbol visibility changes.  We allocated space for them in the
3050    check_relocs routine, but we won't fill them in in the
3051    relocate_section routine.  */
3052
3053 static bfd_boolean
3054 elf_cris_discard_excess_dso_dynamics (h, inf)
3055      struct elf_cris_link_hash_entry *h;
3056      PTR inf;
3057 {
3058   struct elf_cris_pcrel_relocs_copied *s;
3059   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3060
3061   if (h->root.root.type == bfd_link_hash_warning)
3062     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3063
3064   /* If a symbol has been forced local or we have found a regular
3065      definition for the symbolic link case, then we won't be needing
3066      any relocs.  */
3067   if (h->root.def_regular
3068       && (h->root.forced_local
3069           || info->symbolic))
3070     {
3071       for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3072         s->section->size -= s->count * sizeof (Elf32_External_Rela);
3073     }
3074
3075   return TRUE;
3076 }
3077
3078 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3079    creating a shared object.  We discard space for relocs for symbols put
3080    in the .got, but which we found we do not have to resolve at run-time.  */
3081
3082 static bfd_boolean
3083 elf_cris_discard_excess_program_dynamics (h, inf)
3084      struct elf_cris_link_hash_entry *h;
3085      PTR inf;
3086 {
3087   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3088
3089   if (h->root.root.type == bfd_link_hash_warning)
3090     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3091
3092   /* If we're not creating a shared library and have a symbol which is
3093      referred to by .got references, but the symbol is defined locally,
3094      (or rather, not defined by a DSO) then lose the reloc for the .got
3095      (don't allocate room for it).  Likewise for relocs for something
3096      for which we create a PLT.  */
3097   if (!h->root.def_dynamic
3098       || h->root.plt.refcount > 0)
3099     {
3100       if (h->root.got.refcount > 0
3101           /* The size of this section is only valid and in sync with the
3102              various reference counts if we do dynamic; don't decrement it
3103              otherwise.  */
3104           && elf_hash_table (info)->dynamic_sections_created)
3105         {
3106           bfd *dynobj = elf_hash_table (info)->dynobj;
3107           asection *srelgot;
3108
3109           BFD_ASSERT (dynobj != NULL);
3110
3111           srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3112
3113           BFD_ASSERT (srelgot != NULL);
3114
3115           srelgot->size -= sizeof (Elf32_External_Rela);
3116         }
3117
3118       /* If the locally-defined symbol isn't used by a DSO, then we don't
3119          have to export it as a dynamic symbol.  This was already done for
3120          functions; doing this for all symbols would presumably not
3121          introduce new problems.  Of course we don't do this if we're
3122          exporting all dynamic symbols.  */
3123       if (! info->export_dynamic
3124           && h->root.dynindx != -1
3125           && !h->root.def_dynamic
3126           && !h->root.ref_dynamic)
3127         {
3128           h->root.dynindx = -1;
3129           _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3130                                   h->root.dynstr_index);
3131         }
3132     }
3133
3134   return TRUE;
3135 }
3136
3137 /* Reject a file depending on presence and expectation of prefixed
3138    underscores on symbols.  */
3139
3140 static bfd_boolean
3141 cris_elf_object_p (abfd)
3142      bfd *abfd;
3143 {
3144   if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3145     return FALSE;
3146
3147   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3148     return (bfd_get_symbol_leading_char (abfd) == '_');
3149   else
3150     return (bfd_get_symbol_leading_char (abfd) == 0);
3151 }
3152
3153 /* Mark presence or absence of leading underscore.  Set machine type
3154    flags from mach type.  */
3155
3156 static void
3157 cris_elf_final_write_processing (abfd, linker)
3158      bfd *abfd;
3159      bfd_boolean linker ATTRIBUTE_UNUSED;
3160 {
3161   unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3162
3163   e_flags &= ~EF_CRIS_UNDERSCORE;
3164   if (bfd_get_symbol_leading_char (abfd) == '_')
3165     e_flags |= EF_CRIS_UNDERSCORE;
3166
3167   switch (bfd_get_mach (abfd))
3168     {
3169     case bfd_mach_cris_v0_v10:
3170       e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3171       break;
3172
3173     case bfd_mach_cris_v10_v32:
3174       e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3175       break;
3176
3177     case bfd_mach_cris_v32:
3178       e_flags |= EF_CRIS_VARIANT_V32;
3179       break;
3180
3181     default:
3182       _bfd_abort (__FILE__, __LINE__,
3183                   _("Unexpected machine number"));
3184     }
3185
3186   elf_elfheader (abfd)->e_flags = e_flags;
3187 }
3188
3189 /* Set the mach type from e_flags value.  */
3190
3191 static bfd_boolean
3192 cris_elf_set_mach_from_flags (abfd, flags)
3193      bfd *abfd;
3194      unsigned long flags;
3195 {
3196   switch (flags & EF_CRIS_VARIANT_MASK)
3197     {
3198     case EF_CRIS_VARIANT_ANY_V0_V10:
3199       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3200       break;
3201
3202     case EF_CRIS_VARIANT_V32:
3203       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3204       break;
3205
3206     case EF_CRIS_VARIANT_COMMON_V10_V32:
3207       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3208       break;
3209
3210     default:
3211       /* Since we don't recognize them, we obviously can't support them
3212          with this code; we'd have to require that all future handling
3213          would be optional.  */
3214       bfd_set_error (bfd_error_wrong_format);
3215       return FALSE;
3216     }
3217
3218   return TRUE;
3219 }
3220
3221 /* Display the flags field.  */
3222
3223 static bfd_boolean
3224 cris_elf_print_private_bfd_data (abfd, ptr)
3225      bfd *abfd;
3226      PTR ptr;
3227 {
3228   FILE *file = (FILE *) ptr;
3229
3230   BFD_ASSERT (abfd != NULL && ptr != NULL);
3231
3232   _bfd_elf_print_private_bfd_data (abfd, ptr);
3233
3234   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3235
3236   if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3237     fprintf (file, _(" [symbols have a _ prefix]"));
3238   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3239       == EF_CRIS_VARIANT_COMMON_V10_V32)
3240     fprintf (file, _(" [v10 and v32]"));
3241   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3242       == EF_CRIS_VARIANT_V32)
3243     fprintf (file, _(" [v32]"));
3244
3245   fputc ('\n', file);
3246   return TRUE;
3247 }
3248
3249 /* Don't mix files with and without a leading underscore.  */
3250
3251 static bfd_boolean
3252 cris_elf_merge_private_bfd_data (ibfd, obfd)
3253      bfd *ibfd;
3254      bfd *obfd;
3255 {
3256   int imach, omach;
3257
3258   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3259     return FALSE;
3260
3261   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3262       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3263     return TRUE;
3264
3265   imach = bfd_get_mach (ibfd);
3266
3267   if (! elf_flags_init (obfd))
3268     {
3269       /* This happens when ld starts out with a 'blank' output file.  */
3270       elf_flags_init (obfd) = TRUE;
3271
3272       /* We ignore the linker-set mach, and instead set it according to
3273          the first input file.  This would also happen if we could
3274          somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3275          This allows us to keep the same linker config across
3276          cris(v0..v10) and crisv32.  The drawback is that we can't force
3277          the output type, which might be a sane thing to do for a
3278          v10+v32 compatibility object.  */
3279       if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3280         return FALSE;
3281     }
3282
3283   if (bfd_get_symbol_leading_char (ibfd)
3284       != bfd_get_symbol_leading_char (obfd))
3285     {
3286       (*_bfd_error_handler)
3287         (bfd_get_symbol_leading_char (ibfd) == '_'
3288          ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3289          : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3290          ibfd);
3291       bfd_set_error (bfd_error_bad_value);
3292       return FALSE;
3293     }
3294
3295   omach = bfd_get_mach (obfd);
3296
3297   if (imach != omach)
3298     {
3299       /* We can get an incompatible combination only if either is
3300          bfd_mach_cris_v32, and the other one isn't compatible.  */
3301       if ((imach == bfd_mach_cris_v32
3302            && omach != bfd_mach_cris_v10_v32)
3303           || (omach == bfd_mach_cris_v32
3304               && imach != bfd_mach_cris_v10_v32))
3305         {
3306           (*_bfd_error_handler)
3307             ((imach == bfd_mach_cris_v32)
3308              ? _("%B contains CRIS v32 code, incompatible"
3309                  " with previous objects")
3310              : _("%B contains non-CRIS-v32 code, incompatible"
3311                  " with previous objects"),
3312              ibfd);
3313           bfd_set_error (bfd_error_bad_value);
3314           return FALSE;
3315         }
3316
3317       /* We don't have to check the case where the input is compatible
3318          with v10 and v32, because the output is already known to be set
3319          to the other (compatible) mach.  */
3320       if (omach == bfd_mach_cris_v10_v32
3321           && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3322         return FALSE;
3323     }
3324
3325   return TRUE;
3326 }
3327
3328 /* Do side-effects of e_flags copying to obfd.  */
3329
3330 static bfd_boolean
3331 cris_elf_copy_private_bfd_data (ibfd, obfd)
3332      bfd *ibfd;
3333      bfd *obfd;
3334 {
3335   /* Call the base function.  */
3336   if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3337     return FALSE;
3338
3339   /* If output is big-endian for some obscure reason, stop here.  */
3340   if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
3341     return FALSE;
3342
3343   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3344       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3345     return TRUE;
3346
3347   /* Do what we really came here for.  */
3348   return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3349 }
3350
3351 static enum elf_reloc_type_class
3352 elf_cris_reloc_type_class (rela)
3353      const Elf_Internal_Rela *rela;
3354 {
3355   switch ((int) ELF32_R_TYPE (rela->r_info))
3356     {
3357     case R_CRIS_RELATIVE:
3358       return reloc_class_relative;
3359     case R_CRIS_JUMP_SLOT:
3360       return reloc_class_plt;
3361     case R_CRIS_COPY:
3362       return reloc_class_copy;
3363     default:
3364       return reloc_class_normal;
3365     }
3366 }
3367 \f
3368 #define ELF_ARCH                bfd_arch_cris
3369 #define ELF_MACHINE_CODE        EM_CRIS
3370 #define ELF_MAXPAGESIZE         0x2000
3371
3372 #define TARGET_LITTLE_SYM       bfd_elf32_cris_vec
3373 #define TARGET_LITTLE_NAME      "elf32-cris"
3374 #define elf_symbol_leading_char 0
3375
3376 #define elf_info_to_howto_rel                   NULL
3377 #define elf_info_to_howto                       cris_info_to_howto_rela
3378 #define elf_backend_relocate_section            cris_elf_relocate_section
3379 #define elf_backend_gc_mark_hook                cris_elf_gc_mark_hook
3380 #define elf_backend_gc_sweep_hook               cris_elf_gc_sweep_hook
3381 #define elf_backend_check_relocs                cris_elf_check_relocs
3382 #define elf_backend_grok_prstatus               cris_elf_grok_prstatus
3383 #define elf_backend_grok_psinfo                 cris_elf_grok_psinfo
3384
3385 #define elf_backend_can_gc_sections             1
3386 #define elf_backend_can_refcount                1
3387
3388 #define elf_backend_object_p                    cris_elf_object_p
3389 #define elf_backend_final_write_processing \
3390         cris_elf_final_write_processing
3391 #define bfd_elf32_bfd_print_private_bfd_data \
3392         cris_elf_print_private_bfd_data
3393 #define bfd_elf32_bfd_merge_private_bfd_data \
3394         cris_elf_merge_private_bfd_data
3395 #define bfd_elf32_bfd_copy_private_bfd_data \
3396         cris_elf_copy_private_bfd_data
3397
3398 #define bfd_elf32_bfd_reloc_type_lookup         cris_reloc_type_lookup
3399 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
3400
3401 #define bfd_elf32_bfd_link_hash_table_create \
3402         elf_cris_link_hash_table_create
3403 #define elf_backend_adjust_dynamic_symbol \
3404         elf_cris_adjust_dynamic_symbol
3405 #define elf_backend_size_dynamic_sections \
3406         elf_cris_size_dynamic_sections
3407 #define elf_backend_init_index_section          _bfd_elf_init_1_index_section
3408 #define elf_backend_finish_dynamic_symbol \
3409         elf_cris_finish_dynamic_symbol
3410 #define elf_backend_finish_dynamic_sections \
3411         elf_cris_finish_dynamic_sections
3412 #define elf_backend_create_dynamic_sections \
3413         _bfd_elf_create_dynamic_sections
3414 #define bfd_elf32_bfd_final_link \
3415         bfd_elf_gc_common_final_link
3416 #define elf_backend_hide_symbol                 elf_cris_hide_symbol
3417 #define elf_backend_reloc_type_class            elf_cris_reloc_type_class
3418
3419 #define elf_backend_want_got_plt        1
3420 #define elf_backend_plt_readonly        1
3421 #define elf_backend_want_plt_sym        0
3422 #define elf_backend_got_header_size     12
3423
3424 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3425    linking and libraries (if it's a win of any significance).  Until then,
3426    take the easy route.  */
3427 #define elf_backend_may_use_rel_p 0
3428 #define elf_backend_may_use_rela_p 1
3429 #define elf_backend_rela_normal         1
3430
3431 #include "elf32-target.h"
3432
3433 #undef TARGET_LITTLE_SYM
3434 #undef TARGET_LITTLE_NAME
3435 #undef elf_symbol_leading_char
3436
3437 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3438 #define TARGET_LITTLE_NAME "elf32-us-cris"
3439 #define elf_symbol_leading_char '_'
3440 #undef elf32_bed
3441 #define elf32_bed elf32_us_cris_bed
3442
3443 #include "elf32-target.h"