| 1 | /* 32-bit ELF support for ARM new abi option. |
| 2 | Copyright 1999, 2000, 2001, 2002 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.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_REL 1 |
| 31 | |
| 32 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec |
| 33 | #define TARGET_LITTLE_NAME "elf32-littlearm" |
| 34 | #define TARGET_BIG_SYM bfd_elf32_bigarm_vec |
| 35 | #define TARGET_BIG_NAME "elf32-bigarm" |
| 36 | |
| 37 | #define elf_info_to_howto 0 |
| 38 | #define elf_info_to_howto_rel elf32_arm_info_to_howto |
| 39 | |
| 40 | #define ARM_ELF_ABI_VERSION 0 |
| 41 | #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM |
| 42 | |
| 43 | static reloc_howto_type * elf32_arm_reloc_type_lookup |
| 44 | PARAMS ((bfd * abfd, bfd_reloc_code_real_type code)); |
| 45 | static bfd_boolean elf32_arm_nabi_grok_prstatus |
| 46 | PARAMS ((bfd *abfd, Elf_Internal_Note *note)); |
| 47 | static bfd_boolean elf32_arm_nabi_grok_psinfo |
| 48 | PARAMS ((bfd *abfd, Elf_Internal_Note *note)); |
| 49 | |
| 50 | /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g. |
| 51 | R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO |
| 52 | in that slot. */ |
| 53 | |
| 54 | static reloc_howto_type elf32_arm_howto_table[] = |
| 55 | { |
| 56 | /* No relocation */ |
| 57 | HOWTO (R_ARM_NONE, /* type */ |
| 58 | 0, /* rightshift */ |
| 59 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 60 | 0, /* bitsize */ |
| 61 | FALSE, /* pc_relative */ |
| 62 | 0, /* bitpos */ |
| 63 | complain_overflow_dont,/* complain_on_overflow */ |
| 64 | bfd_elf_generic_reloc, /* special_function */ |
| 65 | "R_ARM_NONE", /* name */ |
| 66 | FALSE, /* partial_inplace */ |
| 67 | 0, /* src_mask */ |
| 68 | 0, /* dst_mask */ |
| 69 | FALSE), /* pcrel_offset */ |
| 70 | |
| 71 | HOWTO (R_ARM_PC24, /* type */ |
| 72 | 2, /* rightshift */ |
| 73 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 74 | 24, /* bitsize */ |
| 75 | TRUE, /* pc_relative */ |
| 76 | 0, /* bitpos */ |
| 77 | complain_overflow_signed,/* complain_on_overflow */ |
| 78 | bfd_elf_generic_reloc, /* special_function */ |
| 79 | "R_ARM_PC24", /* name */ |
| 80 | FALSE, /* partial_inplace */ |
| 81 | 0x00ffffff, /* src_mask */ |
| 82 | 0x00ffffff, /* dst_mask */ |
| 83 | TRUE), /* pcrel_offset */ |
| 84 | |
| 85 | /* 32 bit absolute */ |
| 86 | HOWTO (R_ARM_ABS32, /* type */ |
| 87 | 0, /* rightshift */ |
| 88 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 89 | 32, /* bitsize */ |
| 90 | FALSE, /* pc_relative */ |
| 91 | 0, /* bitpos */ |
| 92 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 93 | bfd_elf_generic_reloc, /* special_function */ |
| 94 | "R_ARM_ABS32", /* name */ |
| 95 | FALSE, /* partial_inplace */ |
| 96 | 0xffffffff, /* src_mask */ |
| 97 | 0xffffffff, /* dst_mask */ |
| 98 | FALSE), /* pcrel_offset */ |
| 99 | |
| 100 | /* standard 32bit pc-relative reloc */ |
| 101 | HOWTO (R_ARM_REL32, /* type */ |
| 102 | 0, /* rightshift */ |
| 103 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 104 | 32, /* bitsize */ |
| 105 | TRUE, /* pc_relative */ |
| 106 | 0, /* bitpos */ |
| 107 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 108 | bfd_elf_generic_reloc, /* special_function */ |
| 109 | "R_ARM_REL32", /* name */ |
| 110 | FALSE, /* partial_inplace */ |
| 111 | 0xffffffff, /* src_mask */ |
| 112 | 0xffffffff, /* dst_mask */ |
| 113 | TRUE), /* pcrel_offset */ |
| 114 | |
| 115 | /* 8 bit absolute */ |
| 116 | HOWTO (R_ARM_PC13, /* 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_ARM_PC13", /* name */ |
| 125 | FALSE, /* partial_inplace */ |
| 126 | 0x000000ff, /* src_mask */ |
| 127 | 0x000000ff, /* dst_mask */ |
| 128 | FALSE), /* pcrel_offset */ |
| 129 | |
| 130 | /* 16 bit absolute */ |
| 131 | HOWTO (R_ARM_ABS16, /* 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_ARM_ABS16", /* name */ |
| 140 | FALSE, /* partial_inplace */ |
| 141 | 0x0000ffff, /* src_mask */ |
| 142 | 0x0000ffff, /* dst_mask */ |
| 143 | FALSE), /* pcrel_offset */ |
| 144 | |
| 145 | /* 12 bit absolute */ |
| 146 | HOWTO (R_ARM_ABS12, /* type */ |
| 147 | 0, /* rightshift */ |
| 148 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 149 | 12, /* bitsize */ |
| 150 | FALSE, /* pc_relative */ |
| 151 | 0, /* bitpos */ |
| 152 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 153 | bfd_elf_generic_reloc, /* special_function */ |
| 154 | "R_ARM_ABS12", /* name */ |
| 155 | FALSE, /* partial_inplace */ |
| 156 | 0x000008ff, /* src_mask */ |
| 157 | 0x000008ff, /* dst_mask */ |
| 158 | FALSE), /* pcrel_offset */ |
| 159 | |
| 160 | HOWTO (R_ARM_THM_ABS5, /* type */ |
| 161 | 6, /* rightshift */ |
| 162 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 163 | 5, /* bitsize */ |
| 164 | FALSE, /* pc_relative */ |
| 165 | 0, /* bitpos */ |
| 166 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 167 | bfd_elf_generic_reloc, /* special_function */ |
| 168 | "R_ARM_THM_ABS5", /* name */ |
| 169 | FALSE, /* partial_inplace */ |
| 170 | 0x000007e0, /* src_mask */ |
| 171 | 0x000007e0, /* dst_mask */ |
| 172 | FALSE), /* pcrel_offset */ |
| 173 | |
| 174 | /* 8 bit absolute */ |
| 175 | HOWTO (R_ARM_ABS8, /* type */ |
| 176 | 0, /* rightshift */ |
| 177 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 178 | 8, /* bitsize */ |
| 179 | FALSE, /* pc_relative */ |
| 180 | 0, /* bitpos */ |
| 181 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 182 | bfd_elf_generic_reloc, /* special_function */ |
| 183 | "R_ARM_ABS8", /* name */ |
| 184 | FALSE, /* partial_inplace */ |
| 185 | 0x000000ff, /* src_mask */ |
| 186 | 0x000000ff, /* dst_mask */ |
| 187 | FALSE), /* pcrel_offset */ |
| 188 | |
| 189 | HOWTO (R_ARM_SBREL32, /* type */ |
| 190 | 0, /* rightshift */ |
| 191 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 192 | 0, /* bitsize */ |
| 193 | FALSE, /* pc_relative */ |
| 194 | 0, /* bitpos */ |
| 195 | complain_overflow_dont,/* complain_on_overflow */ |
| 196 | bfd_elf_generic_reloc, /* special_function */ |
| 197 | "R_ARM_SBREL32", /* name */ |
| 198 | FALSE, /* partial_inplace */ |
| 199 | 0, /* src_mask */ |
| 200 | 0, /* dst_mask */ |
| 201 | FALSE), /* pcrel_offset */ |
| 202 | |
| 203 | HOWTO (R_ARM_THM_PC22, /* type */ |
| 204 | 1, /* rightshift */ |
| 205 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 206 | 23, /* bitsize */ |
| 207 | TRUE, /* pc_relative */ |
| 208 | 0, /* bitpos */ |
| 209 | complain_overflow_signed,/* complain_on_overflow */ |
| 210 | bfd_elf_generic_reloc, /* special_function */ |
| 211 | "R_ARM_THM_PC22", /* name */ |
| 212 | FALSE, /* partial_inplace */ |
| 213 | 0x07ff07ff, /* src_mask */ |
| 214 | 0x07ff07ff, /* dst_mask */ |
| 215 | TRUE), /* pcrel_offset */ |
| 216 | |
| 217 | HOWTO (R_ARM_THM_PC8, /* type */ |
| 218 | 1, /* rightshift */ |
| 219 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 220 | 8, /* bitsize */ |
| 221 | TRUE, /* pc_relative */ |
| 222 | 0, /* bitpos */ |
| 223 | complain_overflow_signed,/* complain_on_overflow */ |
| 224 | bfd_elf_generic_reloc, /* special_function */ |
| 225 | "R_ARM_THM_PC8", /* name */ |
| 226 | FALSE, /* partial_inplace */ |
| 227 | 0x000000ff, /* src_mask */ |
| 228 | 0x000000ff, /* dst_mask */ |
| 229 | TRUE), /* pcrel_offset */ |
| 230 | |
| 231 | HOWTO (R_ARM_AMP_VCALL9, /* type */ |
| 232 | 1, /* rightshift */ |
| 233 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 234 | 8, /* bitsize */ |
| 235 | TRUE, /* pc_relative */ |
| 236 | 0, /* bitpos */ |
| 237 | complain_overflow_signed,/* complain_on_overflow */ |
| 238 | bfd_elf_generic_reloc, /* special_function */ |
| 239 | "R_ARM_AMP_VCALL9", /* name */ |
| 240 | FALSE, /* partial_inplace */ |
| 241 | 0x000000ff, /* src_mask */ |
| 242 | 0x000000ff, /* dst_mask */ |
| 243 | TRUE), /* pcrel_offset */ |
| 244 | |
| 245 | HOWTO (R_ARM_SWI24, /* type */ |
| 246 | 0, /* rightshift */ |
| 247 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 248 | 0, /* bitsize */ |
| 249 | FALSE, /* pc_relative */ |
| 250 | 0, /* bitpos */ |
| 251 | complain_overflow_signed,/* complain_on_overflow */ |
| 252 | bfd_elf_generic_reloc, /* special_function */ |
| 253 | "R_ARM_SWI24", /* name */ |
| 254 | FALSE, /* partial_inplace */ |
| 255 | 0x00000000, /* src_mask */ |
| 256 | 0x00000000, /* dst_mask */ |
| 257 | FALSE), /* pcrel_offset */ |
| 258 | |
| 259 | HOWTO (R_ARM_THM_SWI8, /* 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_signed,/* complain_on_overflow */ |
| 266 | bfd_elf_generic_reloc, /* special_function */ |
| 267 | "R_ARM_SWI8", /* name */ |
| 268 | FALSE, /* partial_inplace */ |
| 269 | 0x00000000, /* src_mask */ |
| 270 | 0x00000000, /* dst_mask */ |
| 271 | FALSE), /* pcrel_offset */ |
| 272 | |
| 273 | /* BLX instruction for the ARM. */ |
| 274 | HOWTO (R_ARM_XPC25, /* type */ |
| 275 | 2, /* rightshift */ |
| 276 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 277 | 25, /* bitsize */ |
| 278 | TRUE, /* pc_relative */ |
| 279 | 0, /* bitpos */ |
| 280 | complain_overflow_signed,/* complain_on_overflow */ |
| 281 | bfd_elf_generic_reloc, /* special_function */ |
| 282 | "R_ARM_XPC25", /* name */ |
| 283 | FALSE, /* partial_inplace */ |
| 284 | 0x00ffffff, /* src_mask */ |
| 285 | 0x00ffffff, /* dst_mask */ |
| 286 | TRUE), /* pcrel_offset */ |
| 287 | |
| 288 | /* BLX instruction for the Thumb. */ |
| 289 | HOWTO (R_ARM_THM_XPC22, /* type */ |
| 290 | 2, /* rightshift */ |
| 291 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 292 | 22, /* bitsize */ |
| 293 | TRUE, /* pc_relative */ |
| 294 | 0, /* bitpos */ |
| 295 | complain_overflow_signed,/* complain_on_overflow */ |
| 296 | bfd_elf_generic_reloc, /* special_function */ |
| 297 | "R_ARM_THM_XPC22", /* name */ |
| 298 | FALSE, /* partial_inplace */ |
| 299 | 0x07ff07ff, /* src_mask */ |
| 300 | 0x07ff07ff, /* dst_mask */ |
| 301 | TRUE), /* pcrel_offset */ |
| 302 | |
| 303 | /* These next three relocs are not defined, but we need to fill the space. */ |
| 304 | |
| 305 | HOWTO (R_ARM_NONE, /* type */ |
| 306 | 0, /* rightshift */ |
| 307 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 308 | 0, /* bitsize */ |
| 309 | FALSE, /* pc_relative */ |
| 310 | 0, /* bitpos */ |
| 311 | complain_overflow_dont,/* complain_on_overflow */ |
| 312 | bfd_elf_generic_reloc, /* special_function */ |
| 313 | "R_ARM_unknown_17", /* name */ |
| 314 | FALSE, /* partial_inplace */ |
| 315 | 0, /* src_mask */ |
| 316 | 0, /* dst_mask */ |
| 317 | FALSE), /* pcrel_offset */ |
| 318 | |
| 319 | HOWTO (R_ARM_NONE, /* type */ |
| 320 | 0, /* rightshift */ |
| 321 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 322 | 0, /* bitsize */ |
| 323 | FALSE, /* pc_relative */ |
| 324 | 0, /* bitpos */ |
| 325 | complain_overflow_dont,/* complain_on_overflow */ |
| 326 | bfd_elf_generic_reloc, /* special_function */ |
| 327 | "R_ARM_unknown_18", /* name */ |
| 328 | FALSE, /* partial_inplace */ |
| 329 | 0, /* src_mask */ |
| 330 | 0, /* dst_mask */ |
| 331 | FALSE), /* pcrel_offset */ |
| 332 | |
| 333 | HOWTO (R_ARM_NONE, /* type */ |
| 334 | 0, /* rightshift */ |
| 335 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 336 | 0, /* bitsize */ |
| 337 | FALSE, /* pc_relative */ |
| 338 | 0, /* bitpos */ |
| 339 | complain_overflow_dont,/* complain_on_overflow */ |
| 340 | bfd_elf_generic_reloc, /* special_function */ |
| 341 | "R_ARM_unknown_19", /* name */ |
| 342 | FALSE, /* partial_inplace */ |
| 343 | 0, /* src_mask */ |
| 344 | 0, /* dst_mask */ |
| 345 | FALSE), /* pcrel_offset */ |
| 346 | |
| 347 | /* Relocs used in ARM Linux */ |
| 348 | |
| 349 | HOWTO (R_ARM_COPY, /* type */ |
| 350 | 0, /* rightshift */ |
| 351 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 352 | 32, /* bitsize */ |
| 353 | FALSE, /* pc_relative */ |
| 354 | 0, /* bitpos */ |
| 355 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 356 | bfd_elf_generic_reloc, /* special_function */ |
| 357 | "R_ARM_COPY", /* name */ |
| 358 | TRUE, /* partial_inplace */ |
| 359 | 0xffffffff, /* src_mask */ |
| 360 | 0xffffffff, /* dst_mask */ |
| 361 | FALSE), /* pcrel_offset */ |
| 362 | |
| 363 | HOWTO (R_ARM_GLOB_DAT, /* type */ |
| 364 | 0, /* rightshift */ |
| 365 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 366 | 32, /* bitsize */ |
| 367 | FALSE, /* pc_relative */ |
| 368 | 0, /* bitpos */ |
| 369 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 370 | bfd_elf_generic_reloc, /* special_function */ |
| 371 | "R_ARM_GLOB_DAT", /* name */ |
| 372 | TRUE, /* partial_inplace */ |
| 373 | 0xffffffff, /* src_mask */ |
| 374 | 0xffffffff, /* dst_mask */ |
| 375 | FALSE), /* pcrel_offset */ |
| 376 | |
| 377 | HOWTO (R_ARM_JUMP_SLOT, /* type */ |
| 378 | 0, /* rightshift */ |
| 379 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 380 | 32, /* bitsize */ |
| 381 | FALSE, /* pc_relative */ |
| 382 | 0, /* bitpos */ |
| 383 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 384 | bfd_elf_generic_reloc, /* special_function */ |
| 385 | "R_ARM_JUMP_SLOT", /* name */ |
| 386 | TRUE, /* partial_inplace */ |
| 387 | 0xffffffff, /* src_mask */ |
| 388 | 0xffffffff, /* dst_mask */ |
| 389 | FALSE), /* pcrel_offset */ |
| 390 | |
| 391 | HOWTO (R_ARM_RELATIVE, /* type */ |
| 392 | 0, /* rightshift */ |
| 393 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 394 | 32, /* bitsize */ |
| 395 | FALSE, /* pc_relative */ |
| 396 | 0, /* bitpos */ |
| 397 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 398 | bfd_elf_generic_reloc, /* special_function */ |
| 399 | "R_ARM_RELATIVE", /* name */ |
| 400 | TRUE, /* partial_inplace */ |
| 401 | 0xffffffff, /* src_mask */ |
| 402 | 0xffffffff, /* dst_mask */ |
| 403 | FALSE), /* pcrel_offset */ |
| 404 | |
| 405 | HOWTO (R_ARM_GOTOFF, /* type */ |
| 406 | 0, /* rightshift */ |
| 407 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 408 | 32, /* bitsize */ |
| 409 | FALSE, /* pc_relative */ |
| 410 | 0, /* bitpos */ |
| 411 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 412 | bfd_elf_generic_reloc, /* special_function */ |
| 413 | "R_ARM_GOTOFF", /* name */ |
| 414 | TRUE, /* partial_inplace */ |
| 415 | 0xffffffff, /* src_mask */ |
| 416 | 0xffffffff, /* dst_mask */ |
| 417 | FALSE), /* pcrel_offset */ |
| 418 | |
| 419 | HOWTO (R_ARM_GOTPC, /* type */ |
| 420 | 0, /* rightshift */ |
| 421 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 422 | 32, /* bitsize */ |
| 423 | TRUE, /* pc_relative */ |
| 424 | 0, /* bitpos */ |
| 425 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 426 | bfd_elf_generic_reloc, /* special_function */ |
| 427 | "R_ARM_GOTPC", /* name */ |
| 428 | TRUE, /* partial_inplace */ |
| 429 | 0xffffffff, /* src_mask */ |
| 430 | 0xffffffff, /* dst_mask */ |
| 431 | TRUE), /* pcrel_offset */ |
| 432 | |
| 433 | HOWTO (R_ARM_GOT32, /* type */ |
| 434 | 0, /* rightshift */ |
| 435 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 436 | 32, /* bitsize */ |
| 437 | FALSE, /* pc_relative */ |
| 438 | 0, /* bitpos */ |
| 439 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 440 | bfd_elf_generic_reloc, /* special_function */ |
| 441 | "R_ARM_GOT32", /* name */ |
| 442 | TRUE, /* partial_inplace */ |
| 443 | 0xffffffff, /* src_mask */ |
| 444 | 0xffffffff, /* dst_mask */ |
| 445 | FALSE), /* pcrel_offset */ |
| 446 | |
| 447 | HOWTO (R_ARM_PLT32, /* type */ |
| 448 | 2, /* rightshift */ |
| 449 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 450 | 26, /* bitsize */ |
| 451 | TRUE, /* pc_relative */ |
| 452 | 0, /* bitpos */ |
| 453 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 454 | bfd_elf_generic_reloc, /* special_function */ |
| 455 | "R_ARM_PLT32", /* name */ |
| 456 | TRUE, /* partial_inplace */ |
| 457 | 0x00ffffff, /* src_mask */ |
| 458 | 0x00ffffff, /* dst_mask */ |
| 459 | TRUE), /* pcrel_offset */ |
| 460 | |
| 461 | /* End of relocs used in ARM Linux */ |
| 462 | |
| 463 | HOWTO (R_ARM_RREL32, /* type */ |
| 464 | 0, /* rightshift */ |
| 465 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 466 | 0, /* bitsize */ |
| 467 | FALSE, /* pc_relative */ |
| 468 | 0, /* bitpos */ |
| 469 | complain_overflow_dont,/* complain_on_overflow */ |
| 470 | bfd_elf_generic_reloc, /* special_function */ |
| 471 | "R_ARM_RREL32", /* name */ |
| 472 | FALSE, /* partial_inplace */ |
| 473 | 0, /* src_mask */ |
| 474 | 0, /* dst_mask */ |
| 475 | FALSE), /* pcrel_offset */ |
| 476 | |
| 477 | HOWTO (R_ARM_RABS32, /* type */ |
| 478 | 0, /* rightshift */ |
| 479 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 480 | 0, /* bitsize */ |
| 481 | FALSE, /* pc_relative */ |
| 482 | 0, /* bitpos */ |
| 483 | complain_overflow_dont,/* complain_on_overflow */ |
| 484 | bfd_elf_generic_reloc, /* special_function */ |
| 485 | "R_ARM_RABS32", /* name */ |
| 486 | FALSE, /* partial_inplace */ |
| 487 | 0, /* src_mask */ |
| 488 | 0, /* dst_mask */ |
| 489 | FALSE), /* pcrel_offset */ |
| 490 | |
| 491 | HOWTO (R_ARM_RPC24, /* type */ |
| 492 | 0, /* rightshift */ |
| 493 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 494 | 0, /* bitsize */ |
| 495 | FALSE, /* pc_relative */ |
| 496 | 0, /* bitpos */ |
| 497 | complain_overflow_dont,/* complain_on_overflow */ |
| 498 | bfd_elf_generic_reloc, /* special_function */ |
| 499 | "R_ARM_RPC24", /* name */ |
| 500 | FALSE, /* partial_inplace */ |
| 501 | 0, /* src_mask */ |
| 502 | 0, /* dst_mask */ |
| 503 | FALSE), /* pcrel_offset */ |
| 504 | |
| 505 | HOWTO (R_ARM_RBASE, /* type */ |
| 506 | 0, /* rightshift */ |
| 507 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 508 | 0, /* bitsize */ |
| 509 | FALSE, /* pc_relative */ |
| 510 | 0, /* bitpos */ |
| 511 | complain_overflow_dont,/* complain_on_overflow */ |
| 512 | bfd_elf_generic_reloc, /* special_function */ |
| 513 | "R_ARM_RBASE", /* name */ |
| 514 | FALSE, /* partial_inplace */ |
| 515 | 0, /* src_mask */ |
| 516 | 0, /* dst_mask */ |
| 517 | FALSE), /* pcrel_offset */ |
| 518 | |
| 519 | HOWTO (R_ARM_ALU_PCREL7_0, /* type */ |
| 520 | 0, /* rightshift */ |
| 521 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 522 | 12, /* bitsize */ |
| 523 | TRUE, /* pc_relative */ |
| 524 | 0, /* bitpos */ |
| 525 | complain_overflow_dont,/* complain_on_overflow */ |
| 526 | bfd_elf_generic_reloc, /* special_function */ |
| 527 | "R_ARM_ALU_PCREL_7_0", /* name */ |
| 528 | FALSE, /* partial_inplace */ |
| 529 | 0x00000fff, /* src_mask */ |
| 530 | 0x00000fff, /* dst_mask */ |
| 531 | TRUE), /* pcrel_offset */ |
| 532 | |
| 533 | HOWTO (R_ARM_ALU_PCREL15_8, /* type */ |
| 534 | 0, /* rightshift */ |
| 535 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 536 | 12, /* bitsize */ |
| 537 | TRUE, /* pc_relative */ |
| 538 | 8, /* bitpos */ |
| 539 | complain_overflow_dont,/* complain_on_overflow */ |
| 540 | bfd_elf_generic_reloc, /* special_function */ |
| 541 | "R_ARM_ALU_PCREL_15_8",/* name */ |
| 542 | FALSE, /* partial_inplace */ |
| 543 | 0x00000fff, /* src_mask */ |
| 544 | 0x00000fff, /* dst_mask */ |
| 545 | TRUE), /* pcrel_offset */ |
| 546 | |
| 547 | HOWTO (R_ARM_ALU_PCREL23_15, /* type */ |
| 548 | 0, /* rightshift */ |
| 549 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 550 | 12, /* bitsize */ |
| 551 | TRUE, /* pc_relative */ |
| 552 | 16, /* bitpos */ |
| 553 | complain_overflow_dont,/* complain_on_overflow */ |
| 554 | bfd_elf_generic_reloc, /* special_function */ |
| 555 | "R_ARM_ALU_PCREL_23_15",/* name */ |
| 556 | FALSE, /* partial_inplace */ |
| 557 | 0x00000fff, /* src_mask */ |
| 558 | 0x00000fff, /* dst_mask */ |
| 559 | TRUE), /* pcrel_offset */ |
| 560 | }; |
| 561 | |
| 562 | /* GNU extension to record C++ vtable hierarchy */ |
| 563 | static reloc_howto_type elf32_arm_vtinherit_howto = |
| 564 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */ |
| 565 | 0, /* rightshift */ |
| 566 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 567 | 0, /* bitsize */ |
| 568 | FALSE, /* pc_relative */ |
| 569 | 0, /* bitpos */ |
| 570 | complain_overflow_dont, /* complain_on_overflow */ |
| 571 | NULL, /* special_function */ |
| 572 | "R_ARM_GNU_VTINHERIT", /* name */ |
| 573 | FALSE, /* partial_inplace */ |
| 574 | 0, /* src_mask */ |
| 575 | 0, /* dst_mask */ |
| 576 | FALSE); /* pcrel_offset */ |
| 577 | |
| 578 | /* GNU extension to record C++ vtable member usage */ |
| 579 | static reloc_howto_type elf32_arm_vtentry_howto = |
| 580 | HOWTO (R_ARM_GNU_VTENTRY, /* type */ |
| 581 | 0, /* rightshift */ |
| 582 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 583 | 0, /* bitsize */ |
| 584 | FALSE, /* pc_relative */ |
| 585 | 0, /* bitpos */ |
| 586 | complain_overflow_dont, /* complain_on_overflow */ |
| 587 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 588 | "R_ARM_GNU_VTENTRY", /* name */ |
| 589 | FALSE, /* partial_inplace */ |
| 590 | 0, /* src_mask */ |
| 591 | 0, /* dst_mask */ |
| 592 | FALSE); /* pcrel_offset */ |
| 593 | |
| 594 | /* 12 bit pc relative */ |
| 595 | static reloc_howto_type elf32_arm_thm_pc11_howto = |
| 596 | HOWTO (R_ARM_THM_PC11, /* type */ |
| 597 | 1, /* rightshift */ |
| 598 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 599 | 11, /* bitsize */ |
| 600 | TRUE, /* pc_relative */ |
| 601 | 0, /* bitpos */ |
| 602 | complain_overflow_signed, /* complain_on_overflow */ |
| 603 | bfd_elf_generic_reloc, /* special_function */ |
| 604 | "R_ARM_THM_PC11", /* name */ |
| 605 | FALSE, /* partial_inplace */ |
| 606 | 0x000007ff, /* src_mask */ |
| 607 | 0x000007ff, /* dst_mask */ |
| 608 | TRUE); /* pcrel_offset */ |
| 609 | |
| 610 | /* 12 bit pc relative */ |
| 611 | static reloc_howto_type elf32_arm_thm_pc9_howto = |
| 612 | HOWTO (R_ARM_THM_PC9, /* type */ |
| 613 | 1, /* rightshift */ |
| 614 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 615 | 8, /* bitsize */ |
| 616 | TRUE, /* pc_relative */ |
| 617 | 0, /* bitpos */ |
| 618 | complain_overflow_signed, /* complain_on_overflow */ |
| 619 | bfd_elf_generic_reloc, /* special_function */ |
| 620 | "R_ARM_THM_PC9", /* name */ |
| 621 | FALSE, /* partial_inplace */ |
| 622 | 0x000000ff, /* src_mask */ |
| 623 | 0x000000ff, /* dst_mask */ |
| 624 | TRUE); /* pcrel_offset */ |
| 625 | |
| 626 | static void elf32_arm_info_to_howto |
| 627 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 628 | |
| 629 | static void |
| 630 | elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc) |
| 631 | bfd * abfd ATTRIBUTE_UNUSED; |
| 632 | arelent * bfd_reloc; |
| 633 | Elf_Internal_Rela * elf_reloc; |
| 634 | { |
| 635 | unsigned int r_type; |
| 636 | |
| 637 | r_type = ELF32_R_TYPE (elf_reloc->r_info); |
| 638 | |
| 639 | switch (r_type) |
| 640 | { |
| 641 | case R_ARM_GNU_VTINHERIT: |
| 642 | bfd_reloc->howto = & elf32_arm_vtinherit_howto; |
| 643 | break; |
| 644 | |
| 645 | case R_ARM_GNU_VTENTRY: |
| 646 | bfd_reloc->howto = & elf32_arm_vtentry_howto; |
| 647 | break; |
| 648 | |
| 649 | case R_ARM_THM_PC11: |
| 650 | bfd_reloc->howto = & elf32_arm_thm_pc11_howto; |
| 651 | break; |
| 652 | |
| 653 | case R_ARM_THM_PC9: |
| 654 | bfd_reloc->howto = & elf32_arm_thm_pc9_howto; |
| 655 | break; |
| 656 | |
| 657 | default: |
| 658 | if (r_type >= NUM_ELEM (elf32_arm_howto_table)) |
| 659 | bfd_reloc->howto = NULL; |
| 660 | else |
| 661 | bfd_reloc->howto = & elf32_arm_howto_table[r_type]; |
| 662 | break; |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | struct elf32_arm_reloc_map |
| 667 | { |
| 668 | bfd_reloc_code_real_type bfd_reloc_val; |
| 669 | unsigned char elf_reloc_val; |
| 670 | }; |
| 671 | |
| 672 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = |
| 673 | { |
| 674 | {BFD_RELOC_NONE, R_ARM_NONE}, |
| 675 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24}, |
| 676 | {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25}, |
| 677 | {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22}, |
| 678 | {BFD_RELOC_32, R_ARM_ABS32}, |
| 679 | {BFD_RELOC_32_PCREL, R_ARM_REL32}, |
| 680 | {BFD_RELOC_8, R_ARM_ABS8}, |
| 681 | {BFD_RELOC_16, R_ARM_ABS16}, |
| 682 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12}, |
| 683 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5}, |
| 684 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22}, |
| 685 | {BFD_RELOC_ARM_COPY, R_ARM_COPY}, |
| 686 | {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT}, |
| 687 | {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT}, |
| 688 | {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE}, |
| 689 | {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF}, |
| 690 | {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC}, |
| 691 | {BFD_RELOC_ARM_GOT32, R_ARM_GOT32}, |
| 692 | {BFD_RELOC_ARM_PLT32, R_ARM_PLT32} |
| 693 | }; |
| 694 | |
| 695 | static reloc_howto_type * |
| 696 | elf32_arm_reloc_type_lookup (abfd, code) |
| 697 | bfd *abfd ATTRIBUTE_UNUSED; |
| 698 | bfd_reloc_code_real_type code; |
| 699 | { |
| 700 | unsigned int i; |
| 701 | |
| 702 | switch (code) |
| 703 | { |
| 704 | case BFD_RELOC_VTABLE_INHERIT: |
| 705 | return & elf32_arm_vtinherit_howto; |
| 706 | |
| 707 | case BFD_RELOC_VTABLE_ENTRY: |
| 708 | return & elf32_arm_vtentry_howto; |
| 709 | |
| 710 | case BFD_RELOC_THUMB_PCREL_BRANCH12: |
| 711 | return & elf32_arm_thm_pc11_howto; |
| 712 | |
| 713 | case BFD_RELOC_THUMB_PCREL_BRANCH9: |
| 714 | return & elf32_arm_thm_pc9_howto; |
| 715 | |
| 716 | default: |
| 717 | for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++) |
| 718 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code) |
| 719 | return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val]; |
| 720 | |
| 721 | return NULL; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | /* Support for core dump NOTE sections */ |
| 726 | static bfd_boolean |
| 727 | elf32_arm_nabi_grok_prstatus (abfd, note) |
| 728 | bfd *abfd; |
| 729 | Elf_Internal_Note *note; |
| 730 | { |
| 731 | int offset; |
| 732 | size_t raw_size; |
| 733 | |
| 734 | switch (note->descsz) |
| 735 | { |
| 736 | default: |
| 737 | return FALSE; |
| 738 | |
| 739 | case 148: /* Linux/ARM 32-bit*/ |
| 740 | /* pr_cursig */ |
| 741 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 742 | |
| 743 | /* pr_pid */ |
| 744 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); |
| 745 | |
| 746 | /* pr_reg */ |
| 747 | offset = 72; |
| 748 | raw_size = 72; |
| 749 | |
| 750 | break; |
| 751 | } |
| 752 | |
| 753 | /* Make a ".reg/999" section. */ |
| 754 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 755 | raw_size, note->descpos + offset); |
| 756 | } |
| 757 | |
| 758 | static bfd_boolean |
| 759 | elf32_arm_nabi_grok_psinfo (abfd, note) |
| 760 | bfd *abfd; |
| 761 | Elf_Internal_Note *note; |
| 762 | { |
| 763 | switch (note->descsz) |
| 764 | { |
| 765 | default: |
| 766 | return FALSE; |
| 767 | |
| 768 | case 124: /* Linux/ARM elf_prpsinfo */ |
| 769 | elf_tdata (abfd)->core_program |
| 770 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 771 | elf_tdata (abfd)->core_command |
| 772 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 773 | } |
| 774 | |
| 775 | /* Note that for some reason, a spurious space is tacked |
| 776 | onto the end of the args in some (at least one anyway) |
| 777 | implementations, so strip it off if it exists. */ |
| 778 | |
| 779 | { |
| 780 | char *command = elf_tdata (abfd)->core_command; |
| 781 | int n = strlen (command); |
| 782 | |
| 783 | if (0 < n && command[n - 1] == ' ') |
| 784 | command[n - 1] = '\0'; |
| 785 | } |
| 786 | |
| 787 | return TRUE; |
| 788 | } |
| 789 | |
| 790 | #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus |
| 791 | #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo |
| 792 | |
| 793 | #include "elf32-arm.h" |