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
  33 #define elf_info_to_howto               elf32_arm_info_to_howto
  34 #define elf_info_to_howto_rel           0
  35
  36 static reloc_howto_type elf32_arm_howto_table[] =
  37 {
  38   /* No relocation */
  39   HOWTO (R_ARM_NONE,            /* type */
  40          0,                     /* rightshift */
  41          0,                     /* size (0 = byte, 1 = short, 2 = long) */
  42          0,                     /* bitsize */
  43          false,                 /* pc_relative */
  44          0,                     /* bitpos */
  45          complain_overflow_dont,        /* complain_on_overflow */
  46          bfd_elf_generic_reloc, /* special_function */
  47          "R_ARM_NONE",          /* name */
  48          false,                 /* partial_inplace */
  49          0,                     /* src_mask */
  50          0,                     /* dst_mask */
  51          false),                /* pcrel_offset */
  52
  53   HOWTO (R_ARM_PC24,            /* type */
  54          2,                     /* rightshift */
  55          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  56          24,                    /* bitsize */
  57          true,                  /* pc_relative */
  58          0,                     /* bitpos */
  59          complain_overflow_signed,      /* complain_on_overflow */
  60          bfd_elf_generic_reloc, /* special_function */
  61          "R_ARM_PC24",          /* name */
  62          false,                 /* partial_inplace */
  63          0x00ffffff,            /* src_mask */
  64          0x00ffffff,            /* dst_mask */
  65          true),                 /* pcrel_offset */
  66
  67   /* 32 bit absolute */
  68   HOWTO (R_ARM_ABS32,           /* type */
  69          0,                     /* rightshift */
  70          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  71          32,                    /* bitsize */
  72          false,                 /* pc_relative */
  73          0,                     /* bitpos */
  74          complain_overflow_bitfield,    /* complain_on_overflow */
  75          bfd_elf_generic_reloc, /* special_function */
  76          "R_ARM_ABS32",         /* name */
  77          false,                 /* partial_inplace */
  78          0xffffffff,            /* src_mask */
  79          0xffffffff,            /* dst_mask */
  80          false),                /* pcrel_offset */
  81
  82   /* standard 32bit pc-relative reloc */
  83   HOWTO (R_ARM_REL32,           /* type */
  84          0,                     /* rightshift */
  85          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  86          32,                    /* bitsize */
  87          true,                  /* pc_relative */
  88          0,                     /* bitpos */
  89          complain_overflow_bitfield,    /* complain_on_overflow */
  90          bfd_elf_generic_reloc, /* special_function */
  91          "R_ARM_REL32",         /* name */
  92          false,                 /* partial_inplace */
  93          0xffffffff,            /* src_mask */
  94          0xffffffff,            /* dst_mask */
  95          true),                 /* pcrel_offset */
  96
  97   /* 8 bit absolute */
  98   HOWTO (R_ARM_ABS8,            /* type */
  99          0,                     /* rightshift */
 100          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 101          8,                     /* bitsize */
 102          false,                 /* pc_relative */
 103          0,                     /* bitpos */
 104          complain_overflow_bitfield,    /* complain_on_overflow */
 105          bfd_elf_generic_reloc, /* special_function */
 106          "R_ARM_ABS8",          /* name */
 107          false,                 /* partial_inplace */
 108          0x000000ff,            /* src_mask */
 109          0x000000ff,            /* dst_mask */
 110          false),                /* pcrel_offset */
 111
 112    /* 16 bit absolute */
 113   HOWTO (R_ARM_ABS16,           /* type */
 114          0,                     /* rightshift */
 115          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 116          16,                    /* bitsize */
 117          false,                 /* pc_relative */
 118          0,                     /* bitpos */
 119          complain_overflow_bitfield,    /* complain_on_overflow */
 120          bfd_elf_generic_reloc, /* special_function */
 121          "R_ARM_ABS16",         /* name */
 122          false,                 /* partial_inplace */
 123          0,                     /* src_mask */
 124          0,                     /* dst_mask */
 125          false),                /* pcrel_offset */
 126
 127   /* 12 bit absolute */
 128   HOWTO (R_ARM_ABS12,           /* type */
 129          0,                     /* rightshift */
 130          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 131          12,                    /* bitsize */
 132          false,                 /* pc_relative */
 133          0,                     /* bitpos */
 134          complain_overflow_bitfield,    /* complain_on_overflow */
 135          bfd_elf_generic_reloc, /* special_function */
 136          "R_ARM_ABS12",         /* name */
 137          false,                 /* partial_inplace */
 138          0x000008ff,            /* src_mask */
 139          0x000008ff,            /* dst_mask */
 140          false),                /* pcrel_offset */
 141
 142   HOWTO (R_ARM_THM_ABS5,        /* type */
 143          6,                     /* rightshift */
 144          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 145          5,                     /* bitsize */
 146          false,                 /* pc_relative */
 147          0,                     /* bitpos */
 148          complain_overflow_bitfield,    /* complain_on_overflow */
 149          bfd_elf_generic_reloc, /* special_function */
 150          "R_ARM_THM_ABS5",      /* name */
 151          false,                 /* partial_inplace */
 152          0x000007e0,            /* src_mask */
 153          0x000007e0,            /* dst_mask */
 154          false),                /* pcrel_offset */
 155
 156   HOWTO (R_ARM_THM_PC22,        /* type */
 157          1,                     /* rightshift */
 158          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 159          23,                    /* bitsize */
 160          true,                  /* pc_relative */
 161          0,                     /* bitpos */
 162          complain_overflow_signed,      /* complain_on_overflow */
 163          bfd_elf_generic_reloc, /* special_function */
 164          "R_ARM_THM_PC22",      /* name */
 165          false,                 /* partial_inplace */
 166          0x07ff07ff,            /* src_mask */
 167          0x07ff07ff,            /* dst_mask */
 168          true),                 /* pcrel_offset */
 169
 170   HOWTO (R_ARM_SBREL32,         /* type */
 171          0,                     /* rightshift */
 172          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 173          0,                     /* bitsize */
 174          false,                 /* pc_relative */
 175          0,                     /* bitpos */
 176          complain_overflow_dont,        /* complain_on_overflow */
 177          bfd_elf_generic_reloc, /* special_function */
 178          "R_ARM_SBREL32",       /* name */
 179          false,                 /* partial_inplace */
 180          0,                     /* src_mask */
 181          0,                     /* dst_mask */
 182          false),                /* pcrel_offset */
 183
 184   HOWTO (R_ARM_AMP_VCALL9,      /* type */
 185          1,                     /* rightshift */
 186          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 187          8,                     /* bitsize */
 188          true,                  /* pc_relative */
 189          0,                     /* bitpos */
 190          complain_overflow_signed,      /* complain_on_overflow */
 191          bfd_elf_generic_reloc, /* special_function */
 192          "R_ARM_AMP_VCALL9",    /* name */
 193          false,                 /* partial_inplace */
 194          0x000000ff,            /* src_mask */
 195          0x000000ff,            /* dst_mask */
 196          true),                 /* pcrel_offset */
 197
 198   /* 12 bit pc relative */
 199   HOWTO (R_ARM_THM_PC11,        /* type */
 200          1,                     /* rightshift */
 201          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 202          11,                    /* bitsize */
 203          true,                  /* pc_relative */
 204          0,                     /* bitpos */
 205          complain_overflow_signed,      /* complain_on_overflow */
 206          bfd_elf_generic_reloc, /* special_function */
 207          "R_ARM_THM_PC11",      /* name */
 208          false,                 /* partial_inplace */
 209          0x000007ff,            /* src_mask */
 210          0x000007ff,            /* dst_mask */
 211          true),                 /* pcrel_offset */
 212
 213   /* 12 bit pc relative */
 214   HOWTO (R_ARM_THM_PC9,         /* type */
 215          1,                     /* rightshift */
 216          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 217          8,                     /* bitsize */
 218          true,                  /* pc_relative */
 219          0,                     /* bitpos */
 220          complain_overflow_signed,      /* complain_on_overflow */
 221          bfd_elf_generic_reloc, /* special_function */
 222          "R_ARM_THM_PC9",       /* name */
 223          false,                 /* partial_inplace */
 224          0x000000ff,            /* src_mask */
 225          0x000000ff,            /* dst_mask */
 226          true),                 /* pcrel_offset */
 227
 228   /* GNU extension to record C++ vtable hierarchy */
 229   HOWTO (R_ARM_GNU_VTINHERIT, /* type */
 230          0,                     /* rightshift */
 231          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 232          0,                     /* bitsize */
 233          false,                 /* pc_relative */
 234          0,                     /* bitpos */
 235          complain_overflow_dont, /* complain_on_overflow */
 236          NULL,                  /* special_function */
 237          "R_ARM_GNU_VTINHERIT", /* name */
 238          false,                 /* partial_inplace */
 239          0,                     /* src_mask */
 240          0,                     /* dst_mask */
 241          false),                /* pcrel_offset */
 242
 243   /* GNU extension to record C++ vtable member usage */
 244   HOWTO (R_ARM_GNU_VTENTRY,     /* type */
 245          0,                     /* rightshift */
 246          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 247          0,                     /* bitsize */
 248          false,                 /* pc_relative */
 249          0,                     /* bitpos */
 250          complain_overflow_dont, /* complain_on_overflow */
 251          _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
 252          "R_ARM_GNU_VTENTRY",   /* name */
 253          false,                 /* partial_inplace */
 254          0,                     /* src_mask */
 255          0,                     /* dst_mask */
 256          false),                /* pcrel_offset */
 257
 258
 259   HOWTO (R_ARM_RREL32,          /* type */
 260          0,                     /* rightshift */
 261          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 262          0,                     /* bitsize */
 263          false,                 /* pc_relative */
 264          0,                     /* bitpos */
 265          complain_overflow_dont,        /* complain_on_overflow */
 266          bfd_elf_generic_reloc, /* special_function */
 267          "R_ARM_RREL32",        /* name */
 268          false,                 /* partial_inplace */
 269          0,                     /* src_mask */
 270          0,                     /* dst_mask */
 271          false),                /* pcrel_offset */
 272
 273   HOWTO (R_ARM_RABS32,          /* type */
 274          0,                     /* rightshift */
 275          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 276          0,                     /* bitsize */
 277          false,                 /* pc_relative */
 278          0,                     /* bitpos */
 279          complain_overflow_dont,        /* complain_on_overflow */
 280          bfd_elf_generic_reloc, /* special_function */
 281          "R_ARM_RABS32",        /* name */
 282          false,                 /* partial_inplace */
 283          0,                     /* src_mask */
 284          0,                     /* dst_mask */
 285          false),                /* pcrel_offset */
 286
 287   HOWTO (R_ARM_RPC24,           /* type */
 288          0,                     /* rightshift */
 289          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 290          0,                     /* bitsize */
 291          false,                 /* pc_relative */
 292          0,                     /* bitpos */
 293          complain_overflow_dont,        /* complain_on_overflow */
 294          bfd_elf_generic_reloc, /* special_function */
 295          "R_ARM_RPC24",         /* name */
 296          false,                 /* partial_inplace */
 297          0,                     /* src_mask */
 298          0,                     /* dst_mask */
 299          false),                /* pcrel_offset */
 300
 301   HOWTO (R_ARM_RBASE,           /* type */
 302          0,                     /* rightshift */
 303          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 304          0,                     /* bitsize */
 305          false,                 /* pc_relative */
 306          0,                     /* bitpos */
 307          complain_overflow_dont,        /* complain_on_overflow */
 308          bfd_elf_generic_reloc, /* special_function */
 309          "R_ARM_RBASE",         /* name */
 310          false,                 /* partial_inplace */
 311          0,                     /* src_mask */
 312          0,                     /* dst_mask */
 313          false),                /* pcrel_offset */
 314
 315 };
 316
 317 static void
 318 elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc)
 319      bfd *abfd;
 320      arelent *bfd_reloc;
 321      Elf32_Internal_Rela *elf_reloc;
 322 {
 323   unsigned int r_type;
 324
 325   r_type = ELF32_R_TYPE (elf_reloc->r_info);
 326   /* fixme: need range test */
 327   /* BFD_ASSERT (r_type < (unsigned int) R_ELF32_ARM_MAX); */
 328   bfd_reloc->howto = &elf32_arm_howto_table[r_type];
 329 }
 330
 331 struct elf32_arm_reloc_map
 332   {
 333     bfd_reloc_code_real_type bfd_reloc_val;
 334     unsigned char elf_reloc_val;
 335   };
 336
 337 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
 338 {
 339   {BFD_RELOC_NONE, R_ARM_NONE,},
 340   {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24,},
 341   {BFD_RELOC_32, R_ARM_ABS32,},
 342   {BFD_RELOC_32_PCREL, R_ARM_REL32,},
 343   {BFD_RELOC_8, R_ARM_ABS8,},
 344   {BFD_RELOC_16, R_ARM_ABS16,},
 345   {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12,},
 346   {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5,},
 347   {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22,},
 348   {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT },
 349   {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY },
 350   {BFD_RELOC_NONE, R_ARM_SBREL32,},
 351   {BFD_RELOC_NONE, R_ARM_AMP_VCALL9,},
 352   {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11,},
 353   {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_PC9,}
 354 };
 355
 356 static reloc_howto_type *
 357 elf32_arm_reloc_type_lookup (abfd, code)
 358      bfd * abfd;
 359      bfd_reloc_code_real_type code;
 360 {
 361   unsigned int i;
 362
 363   for (i = 0;
 364      i < sizeof (elf32_arm_reloc_map) / sizeof (struct elf32_arm_reloc_map);
 365        i++)
 366     {
 367       if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
 368         return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val];
 369     }
 370
 371   return NULL;
 372 }
 373
 374 #define bfd_elf32_arm_allocate_interworking_sections \
 375         bfd_elf32_arm_oabi_allocate_interworking_sections
 376 #define bfd_elf32_arm_get_bfd_for_interworking \
 377         bfd_elf32_arm_oabi_get_bfd_for_interworking
 378 #define bfd_elf32_arm_process_before_allocation \
 379         bfd_elf32_arm_oabi_process_before_allocation
 380
 381 #include "elf32-arm.h"