| 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 | #ifndef NUM_ELEM |
| 27 | #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) |
| 28 | #endif |
| 29 | |
| 30 | #define USE_RELA |
| 31 | |
| 32 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_oabi_vec |
| 33 | #define TARGET_LITTLE_NAME "elf32-littlearm-oabi" |
| 34 | #define TARGET_BIG_SYM bfd_elf32_bigarm_oabi_vec |
| 35 | #define TARGET_BIG_NAME "elf32-bigarm-oabi" |
| 36 | |
| 37 | #define elf_info_to_howto elf32_arm_info_to_howto |
| 38 | #define elf_info_to_howto_rel 0 |
| 39 | |
| 40 | #define ARM_ELF_ABI_VERSION 0 |
| 41 | #define ARM_ELF_OS_ABI_VERSION 0 |
| 42 | |
| 43 | static reloc_howto_type elf32_arm_howto_table[] = |
| 44 | { |
| 45 | /* No relocation */ |
| 46 | HOWTO (R_ARM_NONE, /* type */ |
| 47 | 0, /* rightshift */ |
| 48 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 49 | 0, /* bitsize */ |
| 50 | false, /* pc_relative */ |
| 51 | 0, /* bitpos */ |
| 52 | complain_overflow_dont, /* complain_on_overflow */ |
| 53 | bfd_elf_generic_reloc, /* special_function */ |
| 54 | "R_ARM_NONE", /* name */ |
| 55 | false, /* partial_inplace */ |
| 56 | 0, /* src_mask */ |
| 57 | 0, /* dst_mask */ |
| 58 | false), /* pcrel_offset */ |
| 59 | |
| 60 | HOWTO (R_ARM_PC24, /* type */ |
| 61 | 2, /* rightshift */ |
| 62 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 63 | 24, /* bitsize */ |
| 64 | true, /* pc_relative */ |
| 65 | 0, /* bitpos */ |
| 66 | complain_overflow_signed, /* complain_on_overflow */ |
| 67 | bfd_elf_generic_reloc, /* special_function */ |
| 68 | "R_ARM_PC24", /* name */ |
| 69 | false, /* partial_inplace */ |
| 70 | 0x00ffffff, /* src_mask */ |
| 71 | 0x00ffffff, /* dst_mask */ |
| 72 | true), /* pcrel_offset */ |
| 73 | |
| 74 | /* 32 bit absolute */ |
| 75 | HOWTO (R_ARM_ABS32, /* type */ |
| 76 | 0, /* rightshift */ |
| 77 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 78 | 32, /* bitsize */ |
| 79 | false, /* pc_relative */ |
| 80 | 0, /* bitpos */ |
| 81 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 82 | bfd_elf_generic_reloc, /* special_function */ |
| 83 | "R_ARM_ABS32", /* name */ |
| 84 | false, /* partial_inplace */ |
| 85 | 0xffffffff, /* src_mask */ |
| 86 | 0xffffffff, /* dst_mask */ |
| 87 | false), /* pcrel_offset */ |
| 88 | |
| 89 | /* standard 32bit pc-relative reloc */ |
| 90 | HOWTO (R_ARM_REL32, /* type */ |
| 91 | 0, /* rightshift */ |
| 92 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 93 | 32, /* bitsize */ |
| 94 | true, /* pc_relative */ |
| 95 | 0, /* bitpos */ |
| 96 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 97 | bfd_elf_generic_reloc, /* special_function */ |
| 98 | "R_ARM_REL32", /* name */ |
| 99 | false, /* partial_inplace */ |
| 100 | 0xffffffff, /* src_mask */ |
| 101 | 0xffffffff, /* dst_mask */ |
| 102 | true), /* pcrel_offset */ |
| 103 | |
| 104 | /* 8 bit absolute */ |
| 105 | HOWTO (R_ARM_ABS8, /* type */ |
| 106 | 0, /* rightshift */ |
| 107 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 108 | 8, /* bitsize */ |
| 109 | false, /* pc_relative */ |
| 110 | 0, /* bitpos */ |
| 111 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 112 | bfd_elf_generic_reloc, /* special_function */ |
| 113 | "R_ARM_ABS8", /* name */ |
| 114 | false, /* partial_inplace */ |
| 115 | 0x000000ff, /* src_mask */ |
| 116 | 0x000000ff, /* dst_mask */ |
| 117 | false), /* pcrel_offset */ |
| 118 | |
| 119 | /* 16 bit absolute */ |
| 120 | HOWTO (R_ARM_ABS16, /* type */ |
| 121 | 0, /* rightshift */ |
| 122 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 123 | 16, /* bitsize */ |
| 124 | false, /* pc_relative */ |
| 125 | 0, /* bitpos */ |
| 126 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 127 | bfd_elf_generic_reloc, /* special_function */ |
| 128 | "R_ARM_ABS16", /* name */ |
| 129 | false, /* partial_inplace */ |
| 130 | 0, /* src_mask */ |
| 131 | 0, /* dst_mask */ |
| 132 | false), /* pcrel_offset */ |
| 133 | |
| 134 | /* 12 bit absolute */ |
| 135 | HOWTO (R_ARM_ABS12, /* type */ |
| 136 | 0, /* rightshift */ |
| 137 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 138 | 12, /* bitsize */ |
| 139 | false, /* pc_relative */ |
| 140 | 0, /* bitpos */ |
| 141 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 142 | bfd_elf_generic_reloc, /* special_function */ |
| 143 | "R_ARM_ABS12", /* name */ |
| 144 | false, /* partial_inplace */ |
| 145 | 0x000008ff, /* src_mask */ |
| 146 | 0x000008ff, /* dst_mask */ |
| 147 | false), /* pcrel_offset */ |
| 148 | |
| 149 | HOWTO (R_ARM_THM_ABS5, /* type */ |
| 150 | 6, /* rightshift */ |
| 151 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 152 | 5, /* bitsize */ |
| 153 | false, /* pc_relative */ |
| 154 | 0, /* bitpos */ |
| 155 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 156 | bfd_elf_generic_reloc, /* special_function */ |
| 157 | "R_ARM_THM_ABS5", /* name */ |
| 158 | false, /* partial_inplace */ |
| 159 | 0x000007e0, /* src_mask */ |
| 160 | 0x000007e0, /* dst_mask */ |
| 161 | false), /* pcrel_offset */ |
| 162 | |
| 163 | HOWTO (R_ARM_THM_PC22, /* type */ |
| 164 | 1, /* rightshift */ |
| 165 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 166 | 23, /* bitsize */ |
| 167 | true, /* pc_relative */ |
| 168 | 0, /* bitpos */ |
| 169 | complain_overflow_signed, /* complain_on_overflow */ |
| 170 | bfd_elf_generic_reloc, /* special_function */ |
| 171 | "R_ARM_THM_PC22", /* name */ |
| 172 | false, /* partial_inplace */ |
| 173 | 0x07ff07ff, /* src_mask */ |
| 174 | 0x07ff07ff, /* dst_mask */ |
| 175 | true), /* pcrel_offset */ |
| 176 | |
| 177 | HOWTO (R_ARM_SBREL32, /* type */ |
| 178 | 0, /* rightshift */ |
| 179 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 180 | 0, /* bitsize */ |
| 181 | false, /* pc_relative */ |
| 182 | 0, /* bitpos */ |
| 183 | complain_overflow_dont,/* complain_on_overflow */ |
| 184 | bfd_elf_generic_reloc, /* special_function */ |
| 185 | "R_ARM_SBREL32", /* name */ |
| 186 | false, /* partial_inplace */ |
| 187 | 0, /* src_mask */ |
| 188 | 0, /* dst_mask */ |
| 189 | false), /* pcrel_offset */ |
| 190 | |
| 191 | HOWTO (R_ARM_AMP_VCALL9, /* type */ |
| 192 | 1, /* rightshift */ |
| 193 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 194 | 8, /* bitsize */ |
| 195 | true, /* pc_relative */ |
| 196 | 0, /* bitpos */ |
| 197 | complain_overflow_signed, /* complain_on_overflow */ |
| 198 | bfd_elf_generic_reloc, /* special_function */ |
| 199 | "R_ARM_AMP_VCALL9", /* name */ |
| 200 | false, /* partial_inplace */ |
| 201 | 0x000000ff, /* src_mask */ |
| 202 | 0x000000ff, /* dst_mask */ |
| 203 | true), /* pcrel_offset */ |
| 204 | |
| 205 | /* 12 bit pc relative */ |
| 206 | HOWTO (R_ARM_THM_PC11, /* type */ |
| 207 | 1, /* rightshift */ |
| 208 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 209 | 11, /* bitsize */ |
| 210 | true, /* pc_relative */ |
| 211 | 0, /* bitpos */ |
| 212 | complain_overflow_signed, /* complain_on_overflow */ |
| 213 | bfd_elf_generic_reloc, /* special_function */ |
| 214 | "R_ARM_THM_PC11", /* name */ |
| 215 | false, /* partial_inplace */ |
| 216 | 0x000007ff, /* src_mask */ |
| 217 | 0x000007ff, /* dst_mask */ |
| 218 | true), /* pcrel_offset */ |
| 219 | |
| 220 | /* 12 bit pc relative */ |
| 221 | HOWTO (R_ARM_THM_PC9, /* type */ |
| 222 | 1, /* rightshift */ |
| 223 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 224 | 8, /* bitsize */ |
| 225 | true, /* pc_relative */ |
| 226 | 0, /* bitpos */ |
| 227 | complain_overflow_signed, /* complain_on_overflow */ |
| 228 | bfd_elf_generic_reloc, /* special_function */ |
| 229 | "R_ARM_THM_PC9", /* name */ |
| 230 | false, /* partial_inplace */ |
| 231 | 0x000000ff, /* src_mask */ |
| 232 | 0x000000ff, /* dst_mask */ |
| 233 | true), /* pcrel_offset */ |
| 234 | |
| 235 | /* GNU extension to record C++ vtable hierarchy */ |
| 236 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */ |
| 237 | 0, /* rightshift */ |
| 238 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 239 | 0, /* bitsize */ |
| 240 | false, /* pc_relative */ |
| 241 | 0, /* bitpos */ |
| 242 | complain_overflow_dont, /* complain_on_overflow */ |
| 243 | NULL, /* special_function */ |
| 244 | "R_ARM_GNU_VTINHERIT", /* name */ |
| 245 | false, /* partial_inplace */ |
| 246 | 0, /* src_mask */ |
| 247 | 0, /* dst_mask */ |
| 248 | false), /* pcrel_offset */ |
| 249 | |
| 250 | /* GNU extension to record C++ vtable member usage */ |
| 251 | HOWTO (R_ARM_GNU_VTENTRY, /* type */ |
| 252 | 0, /* rightshift */ |
| 253 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 254 | 0, /* bitsize */ |
| 255 | false, /* pc_relative */ |
| 256 | 0, /* bitpos */ |
| 257 | complain_overflow_dont, /* complain_on_overflow */ |
| 258 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 259 | "R_ARM_GNU_VTENTRY", /* name */ |
| 260 | false, /* partial_inplace */ |
| 261 | 0, /* src_mask */ |
| 262 | 0, /* dst_mask */ |
| 263 | false), /* pcrel_offset */ |
| 264 | |
| 265 | /* XXX - gap in index numbering here. */ |
| 266 | |
| 267 | HOWTO (R_ARM_PLT32, /* type */ |
| 268 | 2, /* rightshift */ |
| 269 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 270 | 26, /* bitsize */ |
| 271 | true, /* pc_relative */ |
| 272 | 0, /* bitpos */ |
| 273 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 274 | bfd_elf_generic_reloc, /* special_function */ |
| 275 | "R_ARM_PLT32", /* name */ |
| 276 | true, /* partial_inplace */ |
| 277 | 0x00ffffff, /* src_mask */ |
| 278 | 0x00ffffff, /* dst_mask */ |
| 279 | true), /* pcrel_offset */ |
| 280 | |
| 281 | /* XXX - gap in index numbering here. */ |
| 282 | |
| 283 | HOWTO (R_ARM_RREL32, /* type */ |
| 284 | 0, /* rightshift */ |
| 285 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 286 | 0, /* bitsize */ |
| 287 | false, /* pc_relative */ |
| 288 | 0, /* bitpos */ |
| 289 | complain_overflow_dont, /* complain_on_overflow */ |
| 290 | bfd_elf_generic_reloc, /* special_function */ |
| 291 | "R_ARM_RREL32", /* name */ |
| 292 | false, /* partial_inplace */ |
| 293 | 0, /* src_mask */ |
| 294 | 0, /* dst_mask */ |
| 295 | false), /* pcrel_offset */ |
| 296 | |
| 297 | HOWTO (R_ARM_RABS32, /* type */ |
| 298 | 0, /* rightshift */ |
| 299 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 300 | 0, /* bitsize */ |
| 301 | false, /* pc_relative */ |
| 302 | 0, /* bitpos */ |
| 303 | complain_overflow_dont, /* complain_on_overflow */ |
| 304 | bfd_elf_generic_reloc, /* special_function */ |
| 305 | "R_ARM_RABS32", /* name */ |
| 306 | false, /* partial_inplace */ |
| 307 | 0, /* src_mask */ |
| 308 | 0, /* dst_mask */ |
| 309 | false), /* pcrel_offset */ |
| 310 | |
| 311 | HOWTO (R_ARM_RPC24, /* type */ |
| 312 | 0, /* rightshift */ |
| 313 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 314 | 0, /* bitsize */ |
| 315 | false, /* pc_relative */ |
| 316 | 0, /* bitpos */ |
| 317 | complain_overflow_dont, /* complain_on_overflow */ |
| 318 | bfd_elf_generic_reloc, /* special_function */ |
| 319 | "R_ARM_RPC24", /* name */ |
| 320 | false, /* partial_inplace */ |
| 321 | 0, /* src_mask */ |
| 322 | 0, /* dst_mask */ |
| 323 | false), /* pcrel_offset */ |
| 324 | |
| 325 | HOWTO (R_ARM_RBASE, /* type */ |
| 326 | 0, /* rightshift */ |
| 327 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 328 | 0, /* bitsize */ |
| 329 | false, /* pc_relative */ |
| 330 | 0, /* bitpos */ |
| 331 | complain_overflow_dont, /* complain_on_overflow */ |
| 332 | bfd_elf_generic_reloc, /* special_function */ |
| 333 | "R_ARM_RBASE", /* name */ |
| 334 | false, /* partial_inplace */ |
| 335 | 0, /* src_mask */ |
| 336 | 0, /* dst_mask */ |
| 337 | false) /* pcrel_offset */ |
| 338 | }; |
| 339 | |
| 340 | /* Locate a reloc in the howto table. This function must be used |
| 341 | when the entry number is is > R_ARM_GNU_VTINHERIT. */ |
| 342 | static reloc_howto_type * |
| 343 | find_howto (r_type) |
| 344 | unsigned int r_type; |
| 345 | { |
| 346 | int i; |
| 347 | |
| 348 | for (i = NUM_ELEM (elf32_arm_howto_table); i--;) |
| 349 | if (elf32_arm_howto_table [i].type == r_type) |
| 350 | return elf32_arm_howto_table + i; |
| 351 | |
| 352 | return NULL; |
| 353 | } |
| 354 | |
| 355 | static void |
| 356 | elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc) |
| 357 | bfd *abfd ATTRIBUTE_UNUSED; |
| 358 | arelent *bfd_reloc; |
| 359 | Elf32_Internal_Rela *elf_reloc; |
| 360 | { |
| 361 | unsigned int r_type; |
| 362 | |
| 363 | r_type = ELF32_R_TYPE (elf_reloc->r_info); |
| 364 | |
| 365 | if (r_type <= R_ARM_GNU_VTINHERIT) |
| 366 | bfd_reloc->howto = & elf32_arm_howto_table[r_type]; |
| 367 | else |
| 368 | bfd_reloc->howto = find_howto (r_type); |
| 369 | } |
| 370 | |
| 371 | struct elf32_arm_reloc_map |
| 372 | { |
| 373 | bfd_reloc_code_real_type bfd_reloc_val; |
| 374 | unsigned char elf_reloc_val; |
| 375 | }; |
| 376 | |
| 377 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = |
| 378 | { |
| 379 | {BFD_RELOC_NONE, R_ARM_NONE }, |
| 380 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24 }, |
| 381 | {BFD_RELOC_32, R_ARM_ABS32 }, |
| 382 | {BFD_RELOC_32_PCREL, R_ARM_REL32 }, |
| 383 | {BFD_RELOC_8, R_ARM_ABS8 }, |
| 384 | {BFD_RELOC_16, R_ARM_ABS16 }, |
| 385 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12 }, |
| 386 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5 }, |
| 387 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22 }, |
| 388 | {BFD_RELOC_NONE, R_ARM_SBREL32 }, |
| 389 | {BFD_RELOC_NONE, R_ARM_AMP_VCALL9 }, |
| 390 | {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11 }, |
| 391 | {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_PC9 }, |
| 392 | {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT }, |
| 393 | {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY } |
| 394 | }; |
| 395 | |
| 396 | static reloc_howto_type * |
| 397 | elf32_arm_reloc_type_lookup (abfd, code) |
| 398 | bfd * abfd ATTRIBUTE_UNUSED; |
| 399 | bfd_reloc_code_real_type code; |
| 400 | { |
| 401 | unsigned int i; |
| 402 | |
| 403 | for (i = NUM_ELEM (elf32_arm_reloc_map); i--;) |
| 404 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code) |
| 405 | return & elf32_arm_howto_table [elf32_arm_reloc_map[i].elf_reloc_val]; |
| 406 | |
| 407 | if (code == BFD_RELOC_ARM_PLT32) |
| 408 | return find_howto (R_ARM_PLT32); |
| 409 | |
| 410 | return NULL; |
| 411 | } |
| 412 | |
| 413 | #define bfd_elf32_arm_allocate_interworking_sections \ |
| 414 | bfd_elf32_arm_oabi_allocate_interworking_sections |
| 415 | #define bfd_elf32_arm_get_bfd_for_interworking \ |
| 416 | bfd_elf32_arm_oabi_get_bfd_for_interworking |
| 417 | #define bfd_elf32_arm_process_before_allocation \ |
| 418 | bfd_elf32_arm_oabi_process_before_allocation |
| 419 | |
| 420 | #include "elf32-arm.h" |