bfd/elfarm-oabi.c

   1 /* 32-bit ELF support for ARM old abi option.
   2    Copyright 1999 Free Software Foundation, Inc.
   3
   4    This file is part of BFD, the Binary File Descriptor library.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "elf/arm-oabi.h"
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "elf-bfd.h"
  25
  26 #define USE_RELA
  27
  28 #define TARGET_LITTLE_SYM               bfd_elf32_littlearm_oabi_vec
  29 #define TARGET_LITTLE_NAME              "elf32-littlearm-oabi"
  30 #define TARGET_BIG_SYM                  bfd_elf32_bigarm_oabi_vec
  31 #define TARGET_BIG_NAME                 "elf32-bigarm-oabi"
  32 #define elf_info_to_howto               elf32_arm_info_to_howto
  33 #define elf_info_to_howto_rel           0
  34
  35 static reloc_howto_type elf32_arm_howto_table[] =
  36 {
  37   /* No relocation */
  38   HOWTO (R_ARM_NONE,            /* type */
  39          0,                     /* rightshift */
  40          0,                     /* size (0 = byte, 1 = short, 2 = long) */
  41          0,                     /* bitsize */
  42          false,                 /* pc_relative */
  43          0,                     /* bitpos */
  44          complain_overflow_dont,        /* complain_on_overflow */
  45          bfd_elf_generic_reloc, /* special_function */
  46          "R_ARM_NONE",          /* name */
  47          false,                 /* partial_inplace */
  48          0,                     /* src_mask */
  49          0,                     /* dst_mask */
  50          false),                /* pcrel_offset */
  51
  52   HOWTO (R_ARM_PC24,            /* type */
  53          2,                     /* rightshift */
  54          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  55          24,                    /* bitsize */
  56          true,                  /* pc_relative */
  57          0,                     /* bitpos */
  58          complain_overflow_signed,      /* complain_on_overflow */
  59          bfd_elf_generic_reloc, /* special_function */
  60          "R_ARM_PC24",          /* name */
  61          false,                 /* partial_inplace */
  62          0x00ffffff,            /* src_mask */
  63          0x00ffffff,            /* dst_mask */
  64          true),                 /* pcrel_offset */
  65
  66   /* 32 bit absolute */
  67   HOWTO (R_ARM_ABS32,           /* type */
  68          0,                     /* rightshift */
  69          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  70          32,                    /* bitsize */
  71          false,                 /* pc_relative */
  72          0,                     /* bitpos */
  73          complain_overflow_bitfield,    /* complain_on_overflow */
  74          bfd_elf_generic_reloc, /* special_function */
  75          "R_ARM_ABS32",         /* name */
  76          false,                 /* partial_inplace */
  77          0xffffffff,            /* src_mask */
  78          0xffffffff,            /* dst_mask */
  79          false),                /* pcrel_offset */
  80
  81   /* standard 32bit pc-relative reloc */
  82   HOWTO (R_ARM_REL32,           /* type */
  83          0,                     /* rightshift */
  84          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  85          32,                    /* bitsize */
  86          true,                  /* pc_relative */
  87          0,                     /* bitpos */
  88          complain_overflow_bitfield,    /* complain_on_overflow */
  89          bfd_elf_generic_reloc, /* special_function */
  90          "R_ARM_REL32",         /* name */
  91          false,                 /* partial_inplace */
  92          0xffffffff,            /* src_mask */
  93          0xffffffff,            /* dst_mask */
  94          true),                 /* pcrel_offset */
  95
  96   /* 8 bit absolute */
  97   HOWTO (R_ARM_ABS8,            /* type */
  98          0,                     /* rightshift */
  99          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 100          8,                     /* bitsize */
 101          false,                 /* pc_relative */
 102          0,                     /* bitpos */
 103          complain_overflow_bitfield,    /* complain_on_overflow */
 104          bfd_elf_generic_reloc, /* special_function */
 105          "R_ARM_ABS8",          /* name */
 106          false,                 /* partial_inplace */
 107          0x000000ff,            /* src_mask */
 108          0x000000ff,            /* dst_mask */
 109          false),                /* pcrel_offset */
 110
 111    /* 16 bit absolute */
 112   HOWTO (R_ARM_ABS16,           /* type */
 113          0,                     /* rightshift */
 114          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 115          16,                    /* bitsize */
 116          false,                 /* pc_relative */
 117          0,                     /* bitpos */
 118          complain_overflow_bitfield,    /* complain_on_overflow */
 119          bfd_elf_generic_reloc, /* special_function */
 120          "R_ARM_ABS16",         /* name */
 121          false,                 /* partial_inplace */
 122          0,                     /* src_mask */
 123          0,                     /* dst_mask */
 124          false),                /* pcrel_offset */
 125
 126   /* 12 bit absolute */
 127   HOWTO (R_ARM_ABS12,           /* type */
 128          0,                     /* rightshift */
 129          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 130          12,                    /* bitsize */
 131          false,                 /* pc_relative */
 132          0,                     /* bitpos */
 133          complain_overflow_bitfield,    /* complain_on_overflow */
 134          bfd_elf_generic_reloc, /* special_function */
 135          "R_ARM_ABS12",         /* name */
 136          false,                 /* partial_inplace */
 137          0x000008ff,            /* src_mask */
 138          0x000008ff,            /* dst_mask */
 139          false),                /* pcrel_offset */
 140
 141   HOWTO (R_ARM_THM_ABS5,        /* type */
 142          0,                     /* rightshift */
 143          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 144          5,                     /* bitsize */
 145          false,                 /* pc_relative */
 146          0,                     /* bitpos */
 147          complain_overflow_bitfield,    /* complain_on_overflow */
 148          bfd_elf_generic_reloc, /* special_function */
 149          "R_ARM_THM_ABS5",      /* name */
 150          false,                 /* partial_inplace */
 151          0x000007e0,            /* src_mask */
 152          0x000007e0,            /* dst_mask */
 153          false),                /* pcrel_offset */
 154
 155   HOWTO (R_ARM_THM_PC22,        /* type */
 156          1,                     /* rightshift */
 157          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 158          22,                    /* bitsize */
 159          true,                  /* pc_relative */
 160          0,                     /* bitpos */
 161          complain_overflow_signed,      /* complain_on_overflow */
 162          bfd_elf_generic_reloc, /* special_function */
 163          "R_ARM_THM_PC22",      /* name */
 164          false,                 /* partial_inplace */
 165          0x07ff07ff,            /* src_mask */
 166          0x07ff07ff,            /* dst_mask */
 167          true),                 /* pcrel_offset */
 168
 169   HOWTO (R_ARM_SBREL32,         /* type */
 170          0,                     /* rightshift */
 171          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 172          0,                     /* bitsize */
 173          false,                 /* pc_relative */
 174          0,                     /* bitpos */
 175          complain_overflow_dont,        /* complain_on_overflow */
 176          bfd_elf_generic_reloc, /* special_function */
 177          "R_ARM_SBREL32",       /* name */
 178          false,                 /* partial_inplace */
 179          0,                     /* src_mask */
 180          0,                     /* dst_mask */
 181          false),                /* pcrel_offset */
 182
 183   HOWTO (R_ARM_AMP_VCALL9,      /* type */
 184          1,                     /* rightshift */
 185          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 186          8,                     /* bitsize */
 187          true,                  /* pc_relative */
 188          0,                     /* bitpos */
 189          complain_overflow_signed,      /* complain_on_overflow */
 190          bfd_elf_generic_reloc, /* special_function */
 191          "R_ARM_AMP_VCALL9",    /* name */
 192          false,                 /* partial_inplace */
 193          0x000000ff,            /* src_mask */
 194          0x000000ff,            /* dst_mask */
 195          true),                 /* pcrel_offset */
 196
 197   /* 12 bit pc relative */
 198   HOWTO (R_ARM_THM_PC11,        /* type */
 199          1,                     /* rightshift */
 200          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 201          11,                    /* bitsize */
 202          true,                  /* pc_relative */
 203          0,                     /* bitpos */
 204          complain_overflow_signed,      /* complain_on_overflow */
 205          bfd_elf_generic_reloc, /* special_function */
 206          "R_ARM_THM_PC11",      /* name */
 207          false,                 /* partial_inplace */
 208          0x000007ff,            /* src_mask */
 209          0x000007ff,            /* dst_mask */
 210          true),                 /* pcrel_offset */
 211
 212   /* 12 bit pc relative */
 213   HOWTO (R_ARM_THM_PC9,         /* type */
 214          1,                     /* rightshift */
 215          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 216          8,                     /* bitsize */
 217          true,                  /* pc_relative */
 218          0,                     /* bitpos */
 219          complain_overflow_signed,      /* complain_on_overflow */
 220          bfd_elf_generic_reloc, /* special_function */
 221          "R_ARM_THM_PC9",       /* name */
 222          false,                 /* partial_inplace */
 223          0x000000ff,            /* src_mask */
 224          0x000000ff,            /* dst_mask */
 225          true),                 /* pcrel_offset */
 226
 227   /* GNU extension to record C++ vtable hierarchy */
 228   HOWTO (R_ARM_GNU_VTINHERIT, /* type */
 229          0,                     /* rightshift */
 230          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 231          0,                     /* bitsize */
 232          false,                 /* pc_relative */
 233          0,                     /* bitpos */
 234          complain_overflow_dont, /* complain_on_overflow */
 235          NULL,                  /* special_function */
 236          "R_ARM_GNU_VTINHERIT", /* name */
 237          false,                 /* partial_inplace */
 238          0,                     /* src_mask */
 239          0,                     /* dst_mask */
 240          false),                /* pcrel_offset */
 241
 242   /* GNU extension to record C++ vtable member usage */
 243   HOWTO (R_ARM_GNU_VTENTRY,     /* type */
 244          0,                     /* rightshift */
 245          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 246          0,                     /* bitsize */
 247          false,                 /* pc_relative */
 248          0,                     /* bitpos */
 249          complain_overflow_dont, /* complain_on_overflow */
 250          _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
 251          "R_ARM_GNU_VTENTRY",   /* name */
 252          false,                 /* partial_inplace */
 253          0,                     /* src_mask */
 254          0,                     /* dst_mask */
 255          false),                /* pcrel_offset */
 256
 257
 258   HOWTO (R_ARM_RREL32,          /* type */
 259          0,                     /* rightshift */
 260          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 261          0,                     /* bitsize */
 262          false,                 /* pc_relative */
 263          0,                     /* bitpos */
 264          complain_overflow_dont,        /* complain_on_overflow */
 265          bfd_elf_generic_reloc, /* special_function */
 266          "R_ARM_RREL32",        /* name */
 267          false,                 /* partial_inplace */
 268          0,                     /* src_mask */
 269          0,                     /* dst_mask */
 270          false),                /* pcrel_offset */
 271
 272   HOWTO (R_ARM_RABS32,          /* type */
 273          0,                     /* rightshift */
 274          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 275          0,                     /* bitsize */
 276          false,                 /* pc_relative */
 277          0,                     /* bitpos */
 278          complain_overflow_dont,        /* complain_on_overflow */
 279          bfd_elf_generic_reloc, /* special_function */
 280          "R_ARM_RABS32",        /* name */
 281          false,                 /* partial_inplace */
 282          0,                     /* src_mask */
 283          0,                     /* dst_mask */
 284          false),                /* pcrel_offset */
 285
 286   HOWTO (R_ARM_RPC24,           /* type */
 287          0,                     /* rightshift */
 288          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 289          0,                     /* bitsize */
 290          false,                 /* pc_relative */
 291          0,                     /* bitpos */
 292          complain_overflow_dont,        /* complain_on_overflow */
 293          bfd_elf_generic_reloc, /* special_function */
 294          "R_ARM_RPC24",         /* name */
 295          false,                 /* partial_inplace */
 296          0,                     /* src_mask */
 297          0,                     /* dst_mask */
 298          false),                /* pcrel_offset */
 299
 300   HOWTO (R_ARM_RBASE,           /* type */
 301          0,                     /* rightshift */
 302          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 303          0,                     /* bitsize */
 304          false,                 /* pc_relative */
 305          0,                     /* bitpos */
 306          complain_overflow_dont,        /* complain_on_overflow */
 307          bfd_elf_generic_reloc, /* special_function */
 308          "R_ARM_RBASE",         /* name */
 309          false,                 /* partial_inplace */
 310          0,                     /* src_mask */
 311          0,                     /* dst_mask */
 312          false),                /* pcrel_offset */
 313
 314 };
 315
 316 static void
 317 elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc)
 318      bfd *abfd;
 319      arelent *bfd_reloc;
 320      Elf32_Internal_Rela *elf_reloc;
 321 {
 322   unsigned int r_type;
 323
 324   r_type = ELF32_R_TYPE (elf_reloc->r_info);
 325   /* fixme: need range test */
 326   /* BFD_ASSERT (r_type < (unsigned int) R_ELF32_ARM_MAX); */
 327   bfd_reloc->howto = &elf32_arm_howto_table[r_type];
 328 }
 329
 330 struct elf32_arm_reloc_map
 331   {
 332     unsigned char bfd_reloc_val;
 333     unsigned char elf_reloc_val;
 334   };
 335
 336 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
 337 {
 338   {BFD_RELOC_NONE, R_ARM_NONE,},
 339   {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24,},
 340   {BFD_RELOC_32, R_ARM_ABS32,},
 341   {BFD_RELOC_32_PCREL, R_ARM_REL32,},
 342   {BFD_RELOC_8, R_ARM_ABS8,},
 343   {BFD_RELOC_16, R_ARM_ABS16,},
 344   {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12,},
 345   {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5,},
 346   {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22,},
 347   {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT },
 348   {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY },
 349   {BFD_RELOC_NONE, R_ARM_SBREL32,},
 350   {BFD_RELOC_NONE, R_ARM_AMP_VCALL9,},
 351   {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11,},
 352   {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_PC9,}
 353 };
 354
 355 static reloc_howto_type *
 356 elf32_arm_reloc_type_lookup (abfd, code)
 357      bfd *abfd;
 358      bfd_reloc_code_real_type code;
 359 {
 360   unsigned int i;
 361
 362   for (i = 0;
 363      i < sizeof (elf32_arm_reloc_map) / sizeof (struct elf32_arm_reloc_map);
 364        i++)
 365     {
 366       if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
 367         return &elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val];
 368     }
 369
 370   return NULL;
 371 }
 372 #include "elf32-arm.h"